err.no Git - linux-2.6/blob - drivers/net/wireless/iwlwifi/iwl4965-base.c

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2008 Intel Corporation. All rights reserved.
   4  *
   5  * Portions of this file are derived from the ipw3945 project, as well
   6  * as portions of the ieee80211 subsystem header files.
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of version 2 of the GNU General Public License as
  10  * published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  15  * more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along with
  18  * this program; if not, write to the Free Software Foundation, Inc.,
  19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
  20  *
  21  * The full GNU General Public License is included in this distribution in the
  22  * file called LICENSE.
  23  *
  24  * Contact Information:
  25  * James P. Ketrenos <ipw2100-admin@linux.intel.com>
  26  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  27  *
  28  *****************************************************************************/
  29
  30 #include <linux/kernel.h>
  31 #include <linux/module.h>
  32 #include <linux/version.h>
  33 #include <linux/init.h>
  34 #include <linux/pci.h>
  35 #include <linux/dma-mapping.h>
  36 #include <linux/delay.h>
  37 #include <linux/skbuff.h>
  38 #include <linux/netdevice.h>
  39 #include <linux/wireless.h>
  40 #include <linux/firmware.h>
  41 #include <linux/etherdevice.h>
  42 #include <linux/if_arp.h>
  43
  44 #include <net/mac80211.h>
  45
  46 #include <asm/div64.h>
  47
  48 #include "iwl-eeprom.h"
  49 #include "iwl-4965.h"
  50 #include "iwl-core.h"
  51 #include "iwl-io.h"
  52 #include "iwl-helpers.h"
  53 #include "iwl-sta.h"
  54
  55 static int iwl4965_tx_queue_update_write_ptr(struct iwl_priv *priv,
  56                                   struct iwl4965_tx_queue *txq);
  57
  58 /******************************************************************************
  59  *
  60  * module boiler plate
  61  *
  62  ******************************************************************************/
  63
  64 /*
  65  * module name, copyright, version, etc.
  66  * NOTE: DRV_NAME is defined in iwlwifi.h for use by iwl-debug.h and printk
  67  */
  68
  69 #define DRV_DESCRIPTION "Intel(R) Wireless WiFi Link 4965AGN driver for Linux"
  70
  71 #ifdef CONFIG_IWLWIFI_DEBUG
  72 #define VD "d"
  73 #else
  74 #define VD
  75 #endif
  76
  77 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
  78 #define VS "s"
  79 #else
  80 #define VS
  81 #endif
  82
  83 #define DRV_VERSION     IWLWIFI_VERSION VD VS
  84
  85
  86 MODULE_DESCRIPTION(DRV_DESCRIPTION);
  87 MODULE_VERSION(DRV_VERSION);
  88 MODULE_AUTHOR(DRV_COPYRIGHT);
  89 MODULE_LICENSE("GPL");
  90
  91 __le16 *ieee80211_get_qos_ctrl(struct ieee80211_hdr *hdr)
  92 {
  93         u16 fc = le16_to_cpu(hdr->frame_control);
  94         int hdr_len = ieee80211_get_hdrlen(fc);
  95
  96         if ((fc & 0x00cc) == (IEEE80211_STYPE_QOS_DATA | IEEE80211_FTYPE_DATA))
  97                 return (__le16 *) ((u8 *) hdr + hdr_len - QOS_CONTROL_LEN);
  98         return NULL;
  99 }
 100
 101 static const struct ieee80211_supported_band *iwl4965_get_hw_mode(
 102                 struct iwl_priv *priv, enum ieee80211_band band)
 103 {
 104         return priv->hw->wiphy->bands[band];
 105 }
 106
 107 static int iwl4965_is_empty_essid(const char *essid, int essid_len)
 108 {
 109         /* Single white space is for Linksys APs */
 110         if (essid_len == 1 && essid[0] == ' ')
 111                 return 1;
 112
 113         /* Otherwise, if the entire essid is 0, we assume it is hidden */
 114         while (essid_len) {
 115                 essid_len--;
 116                 if (essid[essid_len] != '\0')
 117                         return 0;
 118         }
 119
 120         return 1;
 121 }
 122
 123 static const char *iwl4965_escape_essid(const char *essid, u8 essid_len)
 124 {
 125         static char escaped[IW_ESSID_MAX_SIZE * 2 + 1];
 126         const char *s = essid;
 127         char *d = escaped;
 128
 129         if (iwl4965_is_empty_essid(essid, essid_len)) {
 130                 memcpy(escaped, "<hidden>", sizeof("<hidden>"));
 131                 return escaped;
 132         }
 133
 134         essid_len = min(essid_len, (u8) IW_ESSID_MAX_SIZE);
 135         while (essid_len--) {
 136                 if (*s == '\0') {
 137                         *d++ = '\\';
 138                         *d++ = '0';
 139                         s++;
 140                 } else
 141                         *d++ = *s++;
 142         }
 143         *d = '\0';
 144         return escaped;
 145 }
 146
 147 /*************** DMA-QUEUE-GENERAL-FUNCTIONS  *****
 148  * DMA services
 149  *
 150  * Theory of operation
 151  *
 152  * A Tx or Rx queue resides in host DRAM, and is comprised of a circular buffer
 153  * of buffer descriptors, each of which points to one or more data buffers for
 154  * the device to read from or fill.  Driver and device exchange status of each
 155  * queue via "read" and "write" pointers.  Driver keeps minimum of 2 empty
 156  * entries in each circular buffer, to protect against confusing empty and full
 157  * queue states.
 158  *
 159  * The device reads or writes the data in the queues via the device's several
 160  * DMA/FIFO channels.  Each queue is mapped to a single DMA channel.
 161  *
 162  * For Tx queue, there are low mark and high mark limits. If, after queuing
 163  * the packet for Tx, free space become < low mark, Tx queue stopped. When
 164  * reclaiming packets (on 'tx done IRQ), if free space become > high mark,
 165  * Tx queue resumed.
 166  *
 167  * The 4965 operates with up to 17 queues:  One receive queue, one transmit
 168  * queue (#4) for sending commands to the device firmware, and 15 other
 169  * Tx queues that may be mapped to prioritized Tx DMA/FIFO channels.
 170  *
 171  * See more detailed info in iwl-4965-hw.h.
 172  ***************************************************/
 173
 174 int iwl4965_queue_space(const struct iwl4965_queue *q)
 175 {
 176         int s = q->read_ptr - q->write_ptr;
 177
 178         if (q->read_ptr > q->write_ptr)
 179                 s -= q->n_bd;
 180
 181         if (s <= 0)
 182                 s += q->n_window;
 183         /* keep some reserve to not confuse empty and full situations */
 184         s -= 2;
 185         if (s < 0)
 186                 s = 0;
 187         return s;
 188 }
 189
 190
 191 static inline int x2_queue_used(const struct iwl4965_queue *q, int i)
 192 {
 193         return q->write_ptr > q->read_ptr ?
 194                 (i >= q->read_ptr && i < q->write_ptr) :
 195                 !(i < q->read_ptr && i >= q->write_ptr);
 196 }
 197
 198 static inline u8 get_cmd_index(struct iwl4965_queue *q, u32 index, int is_huge)
 199 {
 200         /* This is for scan command, the big buffer at end of command array */
 201         if (is_huge)
 202                 return q->n_window;     /* must be power of 2 */
 203
 204         /* Otherwise, use normal size buffers */
 205         return index & (q->n_window - 1);
 206 }
 207
 208 /**
 209  * iwl4965_queue_init - Initialize queue's high/low-water and read/write indexes
 210  */
 211 static int iwl4965_queue_init(struct iwl_priv *priv, struct iwl4965_queue *q,
 212                           int count, int slots_num, u32 id)
 213 {
 214         q->n_bd = count;
 215         q->n_window = slots_num;
 216         q->id = id;
 217
 218         /* count must be power-of-two size, otherwise iwl_queue_inc_wrap
 219          * and iwl_queue_dec_wrap are broken. */
 220         BUG_ON(!is_power_of_2(count));
 221
 222         /* slots_num must be power-of-two size, otherwise
 223          * get_cmd_index is broken. */
 224         BUG_ON(!is_power_of_2(slots_num));
 225
 226         q->low_mark = q->n_window / 4;
 227         if (q->low_mark < 4)
 228                 q->low_mark = 4;
 229
 230         q->high_mark = q->n_window / 8;
 231         if (q->high_mark < 2)
 232                 q->high_mark = 2;
 233
 234         q->write_ptr = q->read_ptr = 0;
 235
 236         return 0;
 237 }
 238
 239 /**
 240  * iwl4965_tx_queue_alloc - Alloc driver data and TFD CB for one Tx/cmd queue
 241  */
 242 static int iwl4965_tx_queue_alloc(struct iwl_priv *priv,
 243                               struct iwl4965_tx_queue *txq, u32 id)
 244 {
 245         struct pci_dev *dev = priv->pci_dev;
 246
 247         /* Driver private data, only for Tx (not command) queues,
 248          * not shared with device. */
 249         if (id != IWL_CMD_QUEUE_NUM) {
 250                 txq->txb = kmalloc(sizeof(txq->txb[0]) *
 251                                    TFD_QUEUE_SIZE_MAX, GFP_KERNEL);
 252                 if (!txq->txb) {
 253                         IWL_ERROR("kmalloc for auxiliary BD "
 254                                   "structures failed\n");
 255                         goto error;
 256                 }
 257         } else
 258                 txq->txb = NULL;
 259
 260         /* Circular buffer of transmit frame descriptors (TFDs),
 261          * shared with device */
 262         txq->bd = pci_alloc_consistent(dev,
 263                         sizeof(txq->bd[0]) * TFD_QUEUE_SIZE_MAX,
 264                         &txq->q.dma_addr);
 265
 266         if (!txq->bd) {
 267                 IWL_ERROR("pci_alloc_consistent(%zd) failed\n",
 268                           sizeof(txq->bd[0]) * TFD_QUEUE_SIZE_MAX);
 269                 goto error;
 270         }
 271         txq->q.id = id;
 272
 273         return 0;
 274
 275  error:
 276         if (txq->txb) {
 277                 kfree(txq->txb);
 278                 txq->txb = NULL;
 279         }
 280
 281         return -ENOMEM;
 282 }
 283
 284 /**
 285  * iwl4965_tx_queue_init - Allocate and initialize one tx/cmd queue
 286  */
 287 int iwl4965_tx_queue_init(struct iwl_priv *priv,
 288                       struct iwl4965_tx_queue *txq, int slots_num, u32 txq_id)
 289 {
 290         struct pci_dev *dev = priv->pci_dev;
 291         int len;
 292         int rc = 0;
 293
 294         /*
 295          * Alloc buffer array for commands (Tx or other types of commands).
 296          * For the command queue (#4), allocate command space + one big
 297          * command for scan, since scan command is very huge; the system will
 298          * not have two scans at the same time, so only one is needed.
 299          * For normal Tx queues (all other queues), no super-size command
 300          * space is needed.
 301          */
 302         len = sizeof(struct iwl_cmd) * slots_num;
 303         if (txq_id == IWL_CMD_QUEUE_NUM)
 304                 len +=  IWL_MAX_SCAN_SIZE;
 305         txq->cmd = pci_alloc_consistent(dev, len, &txq->dma_addr_cmd);
 306         if (!txq->cmd)
 307                 return -ENOMEM;
 308
 309         /* Alloc driver data array and TFD circular buffer */
 310         rc = iwl4965_tx_queue_alloc(priv, txq, txq_id);
 311         if (rc) {
 312                 pci_free_consistent(dev, len, txq->cmd, txq->dma_addr_cmd);
 313
 314                 return -ENOMEM;
 315         }
 316         txq->need_update = 0;
 317
 318         /* TFD_QUEUE_SIZE_MAX must be power-of-two size, otherwise
 319          * iwl_queue_inc_wrap and iwl_queue_dec_wrap are broken. */
 320         BUILD_BUG_ON(TFD_QUEUE_SIZE_MAX & (TFD_QUEUE_SIZE_MAX - 1));
 321
 322         /* Initialize queue's high/low-water marks, and head/tail indexes */
 323         iwl4965_queue_init(priv, &txq->q, TFD_QUEUE_SIZE_MAX, slots_num, txq_id);
 324
 325         /* Tell device where to find queue */
 326         iwl4965_hw_tx_queue_init(priv, txq);
 327
 328         return 0;
 329 }
 330
 331 /**
 332  * iwl4965_tx_queue_free - Deallocate DMA queue.
 333  * @txq: Transmit queue to deallocate.
 334  *
 335  * Empty queue by removing and destroying all BD's.
 336  * Free all buffers.
 337  * 0-fill, but do not free "txq" descriptor structure.
 338  */
 339 void iwl4965_tx_queue_free(struct iwl_priv *priv, struct iwl4965_tx_queue *txq)
 340 {
 341         struct iwl4965_queue *q = &txq->q;
 342         struct pci_dev *dev = priv->pci_dev;
 343         int len;
 344
 345         if (q->n_bd == 0)
 346                 return;
 347
 348         /* first, empty all BD's */
 349         for (; q->write_ptr != q->read_ptr;
 350              q->read_ptr = iwl_queue_inc_wrap(q->read_ptr, q->n_bd))
 351                 iwl4965_hw_txq_free_tfd(priv, txq);
 352
 353         len = sizeof(struct iwl_cmd) * q->n_window;
 354         if (q->id == IWL_CMD_QUEUE_NUM)
 355                 len += IWL_MAX_SCAN_SIZE;
 356
 357         /* De-alloc array of command/tx buffers */
 358         pci_free_consistent(dev, len, txq->cmd, txq->dma_addr_cmd);
 359
 360         /* De-alloc circular buffer of TFDs */
 361         if (txq->q.n_bd)
 362                 pci_free_consistent(dev, sizeof(struct iwl4965_tfd_frame) *
 363                                     txq->q.n_bd, txq->bd, txq->q.dma_addr);
 364
 365         /* De-alloc array of per-TFD driver data */
 366         if (txq->txb) {
 367                 kfree(txq->txb);
 368                 txq->txb = NULL;
 369         }
 370
 371         /* 0-fill queue descriptor structure */
 372         memset(txq, 0, sizeof(*txq));
 373 }
 374
 375 const u8 iwl4965_broadcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
 376
 377 /*************** STATION TABLE MANAGEMENT ****
 378  * mac80211 should be examined to determine if sta_info is duplicating
 379  * the functionality provided here
 380  */
 381
 382 /**************************************************************/
 383
 384 #if 0 /* temporary disable till we add real remove station */
 385 /**
 386  * iwl4965_remove_station - Remove driver's knowledge of station.
 387  *
 388  * NOTE:  This does not remove station from device's station table.
 389  */
 390 static u8 iwl4965_remove_station(struct iwl_priv *priv, const u8 *addr, int is_ap)
 391 {
 392         int index = IWL_INVALID_STATION;
 393         int i;
 394         unsigned long flags;
 395
 396         spin_lock_irqsave(&priv->sta_lock, flags);
 397
 398         if (is_ap)
 399                 index = IWL_AP_ID;
 400         else if (is_broadcast_ether_addr(addr))
 401                 index = priv->hw_params.bcast_sta_id;
 402         else
 403                 for (i = IWL_STA_ID; i < priv->hw_params.max_stations; i++)
 404                         if (priv->stations[i].used &&
 405                             !compare_ether_addr(priv->stations[i].sta.sta.addr,
 406                                                 addr)) {
 407                                 index = i;
 408                                 break;
 409                         }
 410
 411         if (unlikely(index == IWL_INVALID_STATION))
 412                 goto out;
 413
 414         if (priv->stations[index].used) {
 415                 priv->stations[index].used = 0;
 416                 priv->num_stations--;
 417         }
 418
 419         BUG_ON(priv->num_stations < 0);
 420
 421 out:
 422         spin_unlock_irqrestore(&priv->sta_lock, flags);
 423         return 0;
 424 }
 425 #endif
 426
 427 /**
 428  * iwl4965_add_station_flags - Add station to tables in driver and device
 429  */
 430 u8 iwl4965_add_station_flags(struct iwl_priv *priv, const u8 *addr,
 431                                 int is_ap, u8 flags, void *ht_data)
 432 {
 433         int i;
 434         int index = IWL_INVALID_STATION;
 435         struct iwl4965_station_entry *station;
 436         unsigned long flags_spin;
 437         DECLARE_MAC_BUF(mac);
 438
 439         spin_lock_irqsave(&priv->sta_lock, flags_spin);
 440         if (is_ap)
 441                 index = IWL_AP_ID;
 442         else if (is_broadcast_ether_addr(addr))
 443                 index = priv->hw_params.bcast_sta_id;
 444         else
 445                 for (i = IWL_STA_ID; i < priv->hw_params.max_stations; i++) {
 446                         if (!compare_ether_addr(priv->stations[i].sta.sta.addr,
 447                                                 addr)) {
 448                                 index = i;
 449                                 break;
 450                         }
 451
 452                         if (!priv->stations[i].used &&
 453                             index == IWL_INVALID_STATION)
 454                                 index = i;
 455                 }
 456
 457
 458         /* These two conditions have the same outcome, but keep them separate
 459           since they have different meanings */
 460         if (unlikely(index == IWL_INVALID_STATION)) {
 461                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 462                 return index;
 463         }
 464
 465         if (priv->stations[index].used &&
 466             !compare_ether_addr(priv->stations[index].sta.sta.addr, addr)) {
 467                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 468                 return index;
 469         }
 470
 471
 472         IWL_DEBUG_ASSOC("Add STA ID %d: %s\n", index, print_mac(mac, addr));
 473         station = &priv->stations[index];
 474         station->used = 1;
 475         priv->num_stations++;
 476
 477         /* Set up the REPLY_ADD_STA command to send to device */
 478         memset(&station->sta, 0, sizeof(struct iwl4965_addsta_cmd));
 479         memcpy(station->sta.sta.addr, addr, ETH_ALEN);
 480         station->sta.mode = 0;
 481         station->sta.sta.sta_id = index;
 482         station->sta.station_flags = 0;
 483
 484 #ifdef CONFIG_IWL4965_HT
 485         /* BCAST station and IBSS stations do not work in HT mode */
 486         if (index != priv->hw_params.bcast_sta_id &&
 487             priv->iw_mode != IEEE80211_IF_TYPE_IBSS)
 488                 iwl4965_set_ht_add_station(priv, index,
 489                                  (struct ieee80211_ht_info *) ht_data);
 490 #endif /*CONFIG_IWL4965_HT*/
 491
 492         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 493
 494         /* Add station to device's station table */
 495         iwl4965_send_add_station(priv, &station->sta, flags);
 496         return index;
 497
 498 }
 499
 500
 501
 502 /*************** HOST COMMAND QUEUE FUNCTIONS   *****/
 503
 504 /**
 505  * iwl4965_enqueue_hcmd - enqueue a uCode command
 506  * @priv: device private data point
 507  * @cmd: a point to the ucode command structure
 508  *
 509  * The function returns < 0 values to indicate the operation is
 510  * failed. On success, it turns the index (> 0) of command in the
 511  * command queue.
 512  */
 513 int iwl4965_enqueue_hcmd(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
 514 {
 515         struct iwl4965_tx_queue *txq = &priv->txq[IWL_CMD_QUEUE_NUM];
 516         struct iwl4965_queue *q = &txq->q;
 517         struct iwl4965_tfd_frame *tfd;
 518         u32 *control_flags;
 519         struct iwl_cmd *out_cmd;
 520         u32 idx;
 521         u16 fix_size = (u16)(cmd->len + sizeof(out_cmd->hdr));
 522         dma_addr_t phys_addr;
 523         int ret;
 524         unsigned long flags;
 525
 526         /* If any of the command structures end up being larger than
 527          * the TFD_MAX_PAYLOAD_SIZE, and it sent as a 'small' command then
 528          * we will need to increase the size of the TFD entries */
 529         BUG_ON((fix_size > TFD_MAX_PAYLOAD_SIZE) &&
 530                !(cmd->meta.flags & CMD_SIZE_HUGE));
 531
 532         if (iwl_is_rfkill(priv)) {
 533                 IWL_DEBUG_INFO("Not sending command - RF KILL");
 534                 return -EIO;
 535         }
 536
 537         if (iwl4965_queue_space(q) < ((cmd->meta.flags & CMD_ASYNC) ? 2 : 1)) {
 538                 IWL_ERROR("No space for Tx\n");
 539                 return -ENOSPC;
 540         }
 541
 542         spin_lock_irqsave(&priv->hcmd_lock, flags);
 543
 544         tfd = &txq->bd[q->write_ptr];
 545         memset(tfd, 0, sizeof(*tfd));
 546
 547         control_flags = (u32 *) tfd;
 548
 549         idx = get_cmd_index(q, q->write_ptr, cmd->meta.flags & CMD_SIZE_HUGE);
 550         out_cmd = &txq->cmd[idx];
 551
 552         out_cmd->hdr.cmd = cmd->id;
 553         memcpy(&out_cmd->meta, &cmd->meta, sizeof(cmd->meta));
 554         memcpy(&out_cmd->cmd.payload, cmd->data, cmd->len);
 555
 556         /* At this point, the out_cmd now has all of the incoming cmd
 557          * information */
 558
 559         out_cmd->hdr.flags = 0;
 560         out_cmd->hdr.sequence = cpu_to_le16(QUEUE_TO_SEQ(IWL_CMD_QUEUE_NUM) |
 561                         INDEX_TO_SEQ(q->write_ptr));
 562         if (out_cmd->meta.flags & CMD_SIZE_HUGE)
 563                 out_cmd->hdr.sequence |= cpu_to_le16(SEQ_HUGE_FRAME);
 564
 565         phys_addr = txq->dma_addr_cmd + sizeof(txq->cmd[0]) * idx +
 566                         offsetof(struct iwl_cmd, hdr);
 567         iwl4965_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, fix_size);
 568
 569         IWL_DEBUG_HC("Sending command %s (#%x), seq: 0x%04X, "
 570                      "%d bytes at %d[%d]:%d\n",
 571                      get_cmd_string(out_cmd->hdr.cmd),
 572                      out_cmd->hdr.cmd, le16_to_cpu(out_cmd->hdr.sequence),
 573                      fix_size, q->write_ptr, idx, IWL_CMD_QUEUE_NUM);
 574
 575         txq->need_update = 1;
 576
 577         /* Set up entry in queue's byte count circular buffer */
 578         priv->cfg->ops->lib->txq_update_byte_cnt_tbl(priv, txq, 0);
 579
 580         /* Increment and update queue's write index */
 581         q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
 582         ret = iwl4965_tx_queue_update_write_ptr(priv, txq);
 583
 584         spin_unlock_irqrestore(&priv->hcmd_lock, flags);
 585         return ret ? ret : idx;
 586 }
 587
 588 static void iwl4965_set_rxon_hwcrypto(struct iwl_priv *priv, int hw_decrypt)
 589 {
 590         struct iwl4965_rxon_cmd *rxon = &priv->staging_rxon;
 591
 592         if (hw_decrypt)
 593                 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
 594         else
 595                 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
 596
 597 }
 598
 599 /**
 600  * iwl4965_rxon_add_station - add station into station table.
 601  *
 602  * there is only one AP station with id= IWL_AP_ID
 603  * NOTE: mutex must be held before calling this fnction
 604  */
 605 static int iwl4965_rxon_add_station(struct iwl_priv *priv,
 606                                 const u8 *addr, int is_ap)
 607 {
 608         u8 sta_id;
 609
 610         /* Add station to device's station table */
 611 #ifdef CONFIG_IWL4965_HT
 612         struct ieee80211_conf *conf = &priv->hw->conf;
 613         struct ieee80211_ht_info *cur_ht_config = &conf->ht_conf;
 614
 615         if ((is_ap) &&
 616             (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) &&
 617             (priv->iw_mode == IEEE80211_IF_TYPE_STA))
 618                 sta_id = iwl4965_add_station_flags(priv, addr, is_ap,
 619                                                    0, cur_ht_config);
 620         else
 621 #endif /* CONFIG_IWL4965_HT */
 622                 sta_id = iwl4965_add_station_flags(priv, addr, is_ap,
 623                                                    0, NULL);
 624
 625         /* Set up default rate scaling table in device's station table */
 626         iwl4965_add_station(priv, addr, is_ap);
 627
 628         return sta_id;
 629 }
 630
 631 /**
 632  * iwl4965_check_rxon_cmd - validate RXON structure is valid
 633  *
 634  * NOTE:  This is really only useful during development and can eventually
 635  * be #ifdef'd out once the driver is stable and folks aren't actively
 636  * making changes
 637  */
 638 static int iwl4965_check_rxon_cmd(struct iwl4965_rxon_cmd *rxon)
 639 {
 640         int error = 0;
 641         int counter = 1;
 642
 643         if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
 644                 error |= le32_to_cpu(rxon->flags &
 645                                 (RXON_FLG_TGJ_NARROW_BAND_MSK |
 646                                  RXON_FLG_RADAR_DETECT_MSK));
 647                 if (error)
 648                         IWL_WARNING("check 24G fields %d | %d\n",
 649                                     counter++, error);
 650         } else {
 651                 error |= (rxon->flags & RXON_FLG_SHORT_SLOT_MSK) ?
 652                                 0 : le32_to_cpu(RXON_FLG_SHORT_SLOT_MSK);
 653                 if (error)
 654                         IWL_WARNING("check 52 fields %d | %d\n",
 655                                     counter++, error);
 656                 error |= le32_to_cpu(rxon->flags & RXON_FLG_CCK_MSK);
 657                 if (error)
 658                         IWL_WARNING("check 52 CCK %d | %d\n",
 659                                     counter++, error);
 660         }
 661         error |= (rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1;
 662         if (error)
 663                 IWL_WARNING("check mac addr %d | %d\n", counter++, error);
 664
 665         /* make sure basic rates 6Mbps and 1Mbps are supported */
 666         error |= (((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0) &&
 667                   ((rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0));
 668         if (error)
 669                 IWL_WARNING("check basic rate %d | %d\n", counter++, error);
 670
 671         error |= (le16_to_cpu(rxon->assoc_id) > 2007);
 672         if (error)
 673                 IWL_WARNING("check assoc id %d | %d\n", counter++, error);
 674
 675         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
 676                         == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK));
 677         if (error)
 678                 IWL_WARNING("check CCK and short slot %d | %d\n",
 679                             counter++, error);
 680
 681         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
 682                         == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK));
 683         if (error)
 684                 IWL_WARNING("check CCK & auto detect %d | %d\n",
 685                             counter++, error);
 686
 687         error |= ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
 688                         RXON_FLG_TGG_PROTECT_MSK)) == RXON_FLG_TGG_PROTECT_MSK);
 689         if (error)
 690                 IWL_WARNING("check TGG and auto detect %d | %d\n",
 691                             counter++, error);
 692
 693         if (error)
 694                 IWL_WARNING("Tuning to channel %d\n",
 695                             le16_to_cpu(rxon->channel));
 696
 697         if (error) {
 698                 IWL_ERROR("Not a valid iwl4965_rxon_assoc_cmd field values\n");
 699                 return -1;
 700         }
 701         return 0;
 702 }
 703
 704 /**
 705  * iwl4965_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
 706  * @priv: staging_rxon is compared to active_rxon
 707  *
 708  * If the RXON structure is changing enough to require a new tune,
 709  * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
 710  * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
 711  */
 712 static int iwl4965_full_rxon_required(struct iwl_priv *priv)
 713 {
 714
 715         /* These items are only settable from the full RXON command */
 716         if (!(priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) ||
 717             compare_ether_addr(priv->staging_rxon.bssid_addr,
 718                                priv->active_rxon.bssid_addr) ||
 719             compare_ether_addr(priv->staging_rxon.node_addr,
 720                                priv->active_rxon.node_addr) ||
 721             compare_ether_addr(priv->staging_rxon.wlap_bssid_addr,
 722                                priv->active_rxon.wlap_bssid_addr) ||
 723             (priv->staging_rxon.dev_type != priv->active_rxon.dev_type) ||
 724             (priv->staging_rxon.channel != priv->active_rxon.channel) ||
 725             (priv->staging_rxon.air_propagation !=
 726              priv->active_rxon.air_propagation) ||
 727             (priv->staging_rxon.ofdm_ht_single_stream_basic_rates !=
 728              priv->active_rxon.ofdm_ht_single_stream_basic_rates) ||
 729             (priv->staging_rxon.ofdm_ht_dual_stream_basic_rates !=
 730              priv->active_rxon.ofdm_ht_dual_stream_basic_rates) ||
 731             (priv->staging_rxon.rx_chain != priv->active_rxon.rx_chain) ||
 732             (priv->staging_rxon.assoc_id != priv->active_rxon.assoc_id))
 733                 return 1;
 734
 735         /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
 736          * be updated with the RXON_ASSOC command -- however only some
 737          * flag transitions are allowed using RXON_ASSOC */
 738
 739         /* Check if we are not switching bands */
 740         if ((priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) !=
 741             (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK))
 742                 return 1;
 743
 744         /* Check if we are switching association toggle */
 745         if ((priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) !=
 746                 (priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK))
 747                 return 1;
 748
 749         return 0;
 750 }
 751
 752 /**
 753  * iwl4965_commit_rxon - commit staging_rxon to hardware
 754  *
 755  * The RXON command in staging_rxon is committed to the hardware and
 756  * the active_rxon structure is updated with the new data.  This
 757  * function correctly transitions out of the RXON_ASSOC_MSK state if
 758  * a HW tune is required based on the RXON structure changes.
 759  */
 760 static int iwl4965_commit_rxon(struct iwl_priv *priv)
 761 {
 762         /* cast away the const for active_rxon in this function */
 763         struct iwl4965_rxon_cmd *active_rxon = (void *)&priv->active_rxon;
 764         DECLARE_MAC_BUF(mac);
 765         int rc = 0;
 766
 767         if (!iwl_is_alive(priv))
 768                 return -1;
 769
 770         /* always get timestamp with Rx frame */
 771         priv->staging_rxon.flags |= RXON_FLG_TSF2HOST_MSK;
 772
 773         rc = iwl4965_check_rxon_cmd(&priv->staging_rxon);
 774         if (rc) {
 775                 IWL_ERROR("Invalid RXON configuration.  Not committing.\n");
 776                 return -EINVAL;
 777         }
 778
 779         /* If we don't need to send a full RXON, we can use
 780          * iwl4965_rxon_assoc_cmd which is used to reconfigure filter
 781          * and other flags for the current radio configuration. */
 782         if (!iwl4965_full_rxon_required(priv)) {
 783                 rc = iwl_send_rxon_assoc(priv);
 784                 if (rc) {
 785                         IWL_ERROR("Error setting RXON_ASSOC "
 786                                   "configuration (%d).\n", rc);
 787                         return rc;
 788                 }
 789
 790                 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
 791
 792                 return 0;
 793         }
 794
 795         /* station table will be cleared */
 796         priv->assoc_station_added = 0;
 797
 798 #ifdef CONFIG_IWL4965_SENSITIVITY
 799         priv->sensitivity_data.state = IWL_SENS_CALIB_NEED_REINIT;
 800         if (!priv->error_recovering)
 801                 priv->start_calib = 0;
 802
 803         iwl4965_init_sensitivity(priv, CMD_ASYNC, 1);
 804 #endif /* CONFIG_IWL4965_SENSITIVITY */
 805
 806         /* If we are currently associated and the new config requires
 807          * an RXON_ASSOC and the new config wants the associated mask enabled,
 808          * we must clear the associated from the active configuration
 809          * before we apply the new config */
 810         if (iwl_is_associated(priv) &&
 811             (priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK)) {
 812                 IWL_DEBUG_INFO("Toggling associated bit on current RXON\n");
 813                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
 814
 815                 rc = iwl_send_cmd_pdu(priv, REPLY_RXON,
 816                                       sizeof(struct iwl4965_rxon_cmd),
 817                                       &priv->active_rxon);
 818
 819                 /* If the mask clearing failed then we set
 820                  * active_rxon back to what it was previously */
 821                 if (rc) {
 822                         active_rxon->filter_flags |= RXON_FILTER_ASSOC_MSK;
 823                         IWL_ERROR("Error clearing ASSOC_MSK on current "
 824                                   "configuration (%d).\n", rc);
 825                         return rc;
 826                 }
 827         }
 828
 829         IWL_DEBUG_INFO("Sending RXON\n"
 830                        "* with%s RXON_FILTER_ASSOC_MSK\n"
 831                        "* channel = %d\n"
 832                        "* bssid = %s\n",
 833                        ((priv->staging_rxon.filter_flags &
 834                          RXON_FILTER_ASSOC_MSK) ? "" : "out"),
 835                        le16_to_cpu(priv->staging_rxon.channel),
 836                        print_mac(mac, priv->staging_rxon.bssid_addr));
 837
 838         iwl4965_set_rxon_hwcrypto(priv, !priv->cfg->mod_params->sw_crypto);
 839         /* Apply the new configuration */
 840         rc = iwl_send_cmd_pdu(priv, REPLY_RXON,
 841                               sizeof(struct iwl4965_rxon_cmd), &priv->staging_rxon);
 842         if (rc) {
 843                 IWL_ERROR("Error setting new configuration (%d).\n", rc);
 844                 return rc;
 845         }
 846
 847         iwlcore_clear_stations_table(priv);
 848
 849 #ifdef CONFIG_IWL4965_SENSITIVITY
 850         if (!priv->error_recovering)
 851                 priv->start_calib = 0;
 852
 853         priv->sensitivity_data.state = IWL_SENS_CALIB_NEED_REINIT;
 854         iwl4965_init_sensitivity(priv, CMD_ASYNC, 1);
 855 #endif /* CONFIG_IWL4965_SENSITIVITY */
 856
 857         memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
 858
 859         /* If we issue a new RXON command which required a tune then we must
 860          * send a new TXPOWER command or we won't be able to Tx any frames */
 861         rc = iwl4965_hw_reg_send_txpower(priv);
 862         if (rc) {
 863                 IWL_ERROR("Error setting Tx power (%d).\n", rc);
 864                 return rc;
 865         }
 866
 867         /* Add the broadcast address so we can send broadcast frames */
 868         if (iwl4965_rxon_add_station(priv, iwl4965_broadcast_addr, 0) ==
 869             IWL_INVALID_STATION) {
 870                 IWL_ERROR("Error adding BROADCAST address for transmit.\n");
 871                 return -EIO;
 872         }
 873
 874         /* If we have set the ASSOC_MSK and we are in BSS mode then
 875          * add the IWL_AP_ID to the station rate table */
 876         if (iwl_is_associated(priv) &&
 877             (priv->iw_mode == IEEE80211_IF_TYPE_STA)) {
 878                 if (iwl4965_rxon_add_station(priv, priv->active_rxon.bssid_addr, 1)
 879                     == IWL_INVALID_STATION) {
 880                         IWL_ERROR("Error adding AP address for transmit.\n");
 881                         return -EIO;
 882                 }
 883                 priv->assoc_station_added = 1;
 884                 if (priv->default_wep_key &&
 885                     iwl_send_static_wepkey_cmd(priv, 0))
 886                         IWL_ERROR("Could not send WEP static key.\n");
 887         }
 888
 889         return 0;
 890 }
 891
 892 static int iwl4965_send_bt_config(struct iwl_priv *priv)
 893 {
 894         struct iwl4965_bt_cmd bt_cmd = {
 895                 .flags = 3,
 896                 .lead_time = 0xAA,
 897                 .max_kill = 1,
 898                 .kill_ack_mask = 0,
 899                 .kill_cts_mask = 0,
 900         };
 901
 902         return iwl_send_cmd_pdu(priv, REPLY_BT_CONFIG,
 903                                 sizeof(struct iwl4965_bt_cmd), &bt_cmd);
 904 }
 905
 906 static int iwl4965_send_scan_abort(struct iwl_priv *priv)
 907 {
 908         int rc = 0;
 909         struct iwl4965_rx_packet *res;
 910         struct iwl_host_cmd cmd = {
 911                 .id = REPLY_SCAN_ABORT_CMD,
 912                 .meta.flags = CMD_WANT_SKB,
 913         };
 914
 915         /* If there isn't a scan actively going on in the hardware
 916          * then we are in between scan bands and not actually
 917          * actively scanning, so don't send the abort command */
 918         if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
 919                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
 920                 return 0;
 921         }
 922
 923         rc = iwl_send_cmd_sync(priv, &cmd);
 924         if (rc) {
 925                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
 926                 return rc;
 927         }
 928
 929         res = (struct iwl4965_rx_packet *)cmd.meta.u.skb->data;
 930         if (res->u.status != CAN_ABORT_STATUS) {
 931                 /* The scan abort will return 1 for success or
 932                  * 2 for "failure".  A failure condition can be
 933                  * due to simply not being in an active scan which
 934                  * can occur if we send the scan abort before we
 935                  * the microcode has notified us that a scan is
 936                  * completed. */
 937                 IWL_DEBUG_INFO("SCAN_ABORT returned %d.\n", res->u.status);
 938                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
 939                 clear_bit(STATUS_SCAN_HW, &priv->status);
 940         }
 941
 942         dev_kfree_skb_any(cmd.meta.u.skb);
 943
 944         return rc;
 945 }
 946
 947 static int iwl4965_card_state_sync_callback(struct iwl_priv *priv,
 948                                         struct iwl_cmd *cmd,
 949                                         struct sk_buff *skb)
 950 {
 951         return 1;
 952 }
 953
 954 /*
 955  * CARD_STATE_CMD
 956  *
 957  * Use: Sets the device's internal card state to enable, disable, or halt
 958  *
 959  * When in the 'enable' state the card operates as normal.
 960  * When in the 'disable' state, the card enters into a low power mode.
 961  * When in the 'halt' state, the card is shut down and must be fully
 962  * restarted to come back on.
 963  */
 964 static int iwl4965_send_card_state(struct iwl_priv *priv, u32 flags, u8 meta_flag)
 965 {
 966         struct iwl_host_cmd cmd = {
 967                 .id = REPLY_CARD_STATE_CMD,
 968                 .len = sizeof(u32),
 969                 .data = &flags,
 970                 .meta.flags = meta_flag,
 971         };
 972
 973         if (meta_flag & CMD_ASYNC)
 974                 cmd.meta.u.callback = iwl4965_card_state_sync_callback;
 975
 976         return iwl_send_cmd(priv, &cmd);
 977 }
 978
 979 static int iwl4965_add_sta_sync_callback(struct iwl_priv *priv,
 980                                      struct iwl_cmd *cmd, struct sk_buff *skb)
 981 {
 982         struct iwl4965_rx_packet *res = NULL;
 983
 984         if (!skb) {
 985                 IWL_ERROR("Error: Response NULL in REPLY_ADD_STA.\n");
 986                 return 1;
 987         }
 988
 989         res = (struct iwl4965_rx_packet *)skb->data;
 990         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
 991                 IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
 992                           res->hdr.flags);
 993                 return 1;
 994         }
 995
 996         switch (res->u.add_sta.status) {
 997         case ADD_STA_SUCCESS_MSK:
 998                 break;
 999         default:
1000                 break;
1001         }
1002
1003         /* We didn't cache the SKB; let the caller free it */
1004         return 1;
1005 }
1006
1007 int iwl4965_send_add_station(struct iwl_priv *priv,
1008                          struct iwl4965_addsta_cmd *sta, u8 flags)
1009 {
1010         struct iwl4965_rx_packet *res = NULL;
1011         int rc = 0;
1012         struct iwl_host_cmd cmd = {
1013                 .id = REPLY_ADD_STA,
1014                 .len = sizeof(struct iwl4965_addsta_cmd),
1015                 .meta.flags = flags,
1016                 .data = sta,
1017         };
1018
1019         if (flags & CMD_ASYNC)
1020                 cmd.meta.u.callback = iwl4965_add_sta_sync_callback;
1021         else
1022                 cmd.meta.flags |= CMD_WANT_SKB;
1023
1024         rc = iwl_send_cmd(priv, &cmd);
1025
1026         if (rc || (flags & CMD_ASYNC))
1027                 return rc;
1028
1029         res = (struct iwl4965_rx_packet *)cmd.meta.u.skb->data;
1030         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1031                 IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
1032                           res->hdr.flags);
1033                 rc = -EIO;
1034         }
1035
1036         if (rc == 0) {
1037                 switch (res->u.add_sta.status) {
1038                 case ADD_STA_SUCCESS_MSK:
1039                         IWL_DEBUG_INFO("REPLY_ADD_STA PASSED\n");
1040                         break;
1041                 default:
1042                         rc = -EIO;
1043                         IWL_WARNING("REPLY_ADD_STA failed\n");
1044                         break;
1045                 }
1046         }
1047
1048         priv->alloc_rxb_skb--;
1049         dev_kfree_skb_any(cmd.meta.u.skb);
1050
1051         return rc;
1052 }
1053
1054 static void iwl4965_clear_free_frames(struct iwl_priv *priv)
1055 {
1056         struct list_head *element;
1057
1058         IWL_DEBUG_INFO("%d frames on pre-allocated heap on clear.\n",
1059                        priv->frames_count);
1060
1061         while (!list_empty(&priv->free_frames)) {
1062                 element = priv->free_frames.next;
1063                 list_del(element);
1064                 kfree(list_entry(element, struct iwl4965_frame, list));
1065                 priv->frames_count--;
1066         }
1067
1068         if (priv->frames_count) {
1069                 IWL_WARNING("%d frames still in use.  Did we lose one?\n",
1070                             priv->frames_count);
1071                 priv->frames_count = 0;
1072         }
1073 }
1074
1075 static struct iwl4965_frame *iwl4965_get_free_frame(struct iwl_priv *priv)
1076 {
1077         struct iwl4965_frame *frame;
1078         struct list_head *element;
1079         if (list_empty(&priv->free_frames)) {
1080                 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
1081                 if (!frame) {
1082                         IWL_ERROR("Could not allocate frame!\n");
1083                         return NULL;
1084                 }
1085
1086                 priv->frames_count++;
1087                 return frame;
1088         }
1089
1090         element = priv->free_frames.next;
1091         list_del(element);
1092         return list_entry(element, struct iwl4965_frame, list);
1093 }
1094
1095 static void iwl4965_free_frame(struct iwl_priv *priv, struct iwl4965_frame *frame)
1096 {
1097         memset(frame, 0, sizeof(*frame));
1098         list_add(&frame->list, &priv->free_frames);
1099 }
1100
1101 unsigned int iwl4965_fill_beacon_frame(struct iwl_priv *priv,
1102                                 struct ieee80211_hdr *hdr,
1103                                 const u8 *dest, int left)
1104 {
1105
1106         if (!iwl_is_associated(priv) || !priv->ibss_beacon ||
1107             ((priv->iw_mode != IEEE80211_IF_TYPE_IBSS) &&
1108              (priv->iw_mode != IEEE80211_IF_TYPE_AP)))
1109                 return 0;
1110
1111         if (priv->ibss_beacon->len > left)
1112                 return 0;
1113
1114         memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);
1115
1116         return priv->ibss_beacon->len;
1117 }
1118
1119 static u8 iwl4965_rate_get_lowest_plcp(int rate_mask)
1120 {
1121         u8 i;
1122
1123         for (i = IWL_RATE_1M_INDEX; i != IWL_RATE_INVALID;
1124              i = iwl4965_rates[i].next_ieee) {
1125                 if (rate_mask & (1 << i))
1126                         return iwl4965_rates[i].plcp;
1127         }
1128
1129         return IWL_RATE_INVALID;
1130 }
1131
1132 static int iwl4965_send_beacon_cmd(struct iwl_priv *priv)
1133 {
1134         struct iwl4965_frame *frame;
1135         unsigned int frame_size;
1136         int rc;
1137         u8 rate;
1138
1139         frame = iwl4965_get_free_frame(priv);
1140
1141         if (!frame) {
1142                 IWL_ERROR("Could not obtain free frame buffer for beacon "
1143                           "command.\n");
1144                 return -ENOMEM;
1145         }
1146
1147         if (!(priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)) {
1148                 rate = iwl4965_rate_get_lowest_plcp(priv->active_rate_basic &
1149                                                 0xFF0);
1150                 if (rate == IWL_INVALID_RATE)
1151                         rate = IWL_RATE_6M_PLCP;
1152         } else {
1153                 rate = iwl4965_rate_get_lowest_plcp(priv->active_rate_basic & 0xF);
1154                 if (rate == IWL_INVALID_RATE)
1155                         rate = IWL_RATE_1M_PLCP;
1156         }
1157
1158         frame_size = iwl4965_hw_get_beacon_cmd(priv, frame, rate);
1159
1160         rc = iwl_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
1161                               &frame->u.cmd[0]);
1162
1163         iwl4965_free_frame(priv, frame);
1164
1165         return rc;
1166 }
1167
1168 /******************************************************************************
1169  *
1170  * Misc. internal state and helper functions
1171  *
1172  ******************************************************************************/
1173
1174 static void iwl4965_unset_hw_params(struct iwl_priv *priv)
1175 {
1176         if (priv->shared_virt)
1177                 pci_free_consistent(priv->pci_dev,
1178                                     sizeof(struct iwl4965_shared),
1179                                     priv->shared_virt,
1180                                     priv->shared_phys);
1181 }
1182
1183 /**
1184  * iwl4965_supported_rate_to_ie - fill in the supported rate in IE field
1185  *
1186  * return : set the bit for each supported rate insert in ie
1187  */
1188 static u16 iwl4965_supported_rate_to_ie(u8 *ie, u16 supported_rate,
1189                                     u16 basic_rate, int *left)
1190 {
1191         u16 ret_rates = 0, bit;
1192         int i;
1193         u8 *cnt = ie;
1194         u8 *rates = ie + 1;
1195
1196         for (bit = 1, i = 0; i < IWL_RATE_COUNT; i++, bit <<= 1) {
1197                 if (bit & supported_rate) {
1198                         ret_rates |= bit;
1199                         rates[*cnt] = iwl4965_rates[i].ieee |
1200                                 ((bit & basic_rate) ? 0x80 : 0x00);
1201                         (*cnt)++;
1202                         (*left)--;
1203                         if ((*left <= 0) ||
1204                             (*cnt >= IWL_SUPPORTED_RATES_IE_LEN))
1205                                 break;
1206                 }
1207         }
1208
1209         return ret_rates;
1210 }
1211
1212 /**
1213  * iwl4965_fill_probe_req - fill in all required fields and IE for probe request
1214  */
1215 static u16 iwl4965_fill_probe_req(struct iwl_priv *priv,
1216                                   enum ieee80211_band band,
1217                                   struct ieee80211_mgmt *frame,
1218                                   int left, int is_direct)
1219 {
1220         int len = 0;
1221         u8 *pos = NULL;
1222         u16 active_rates, ret_rates, cck_rates, active_rate_basic;
1223 #ifdef CONFIG_IWL4965_HT
1224         const struct ieee80211_supported_band *sband =
1225                                                 iwl4965_get_hw_mode(priv, band);
1226 #endif /* CONFIG_IWL4965_HT */
1227
1228         /* Make sure there is enough space for the probe request,
1229          * two mandatory IEs and the data */
1230         left -= 24;
1231         if (left < 0)
1232                 return 0;
1233         len += 24;
1234
1235         frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
1236         memcpy(frame->da, iwl4965_broadcast_addr, ETH_ALEN);
1237         memcpy(frame->sa, priv->mac_addr, ETH_ALEN);
1238         memcpy(frame->bssid, iwl4965_broadcast_addr, ETH_ALEN);
1239         frame->seq_ctrl = 0;
1240
1241         /* fill in our indirect SSID IE */
1242         /* ...next IE... */
1243
1244         left -= 2;
1245         if (left < 0)
1246                 return 0;
1247         len += 2;
1248         pos = &(frame->u.probe_req.variable[0]);
1249         *pos++ = WLAN_EID_SSID;
1250         *pos++ = 0;
1251
1252         /* fill in our direct SSID IE... */
1253         if (is_direct) {
1254                 /* ...next IE... */
1255                 left -= 2 + priv->essid_len;
1256                 if (left < 0)
1257                         return 0;
1258                 /* ... fill it in... */
1259                 *pos++ = WLAN_EID_SSID;
1260                 *pos++ = priv->essid_len;
1261                 memcpy(pos, priv->essid, priv->essid_len);
1262                 pos += priv->essid_len;
1263                 len += 2 + priv->essid_len;
1264         }
1265
1266         /* fill in supported rate */
1267         /* ...next IE... */
1268         left -= 2;
1269         if (left < 0)
1270                 return 0;
1271
1272         /* ... fill it in... */
1273         *pos++ = WLAN_EID_SUPP_RATES;
1274         *pos = 0;
1275
1276         /* exclude 60M rate */
1277         active_rates = priv->rates_mask;
1278         active_rates &= ~IWL_RATE_60M_MASK;
1279
1280         active_rate_basic = active_rates & IWL_BASIC_RATES_MASK;
1281
1282         cck_rates = IWL_CCK_RATES_MASK & active_rates;
1283         ret_rates = iwl4965_supported_rate_to_ie(pos, cck_rates,
1284                         active_rate_basic, &left);
1285         active_rates &= ~ret_rates;
1286
1287         ret_rates = iwl4965_supported_rate_to_ie(pos, active_rates,
1288                                  active_rate_basic, &left);
1289         active_rates &= ~ret_rates;
1290
1291         len += 2 + *pos;
1292         pos += (*pos) + 1;
1293         if (active_rates == 0)
1294                 goto fill_end;
1295
1296         /* fill in supported extended rate */
1297         /* ...next IE... */
1298         left -= 2;
1299         if (left < 0)
1300                 return 0;
1301         /* ... fill it in... */
1302         *pos++ = WLAN_EID_EXT_SUPP_RATES;
1303         *pos = 0;
1304         iwl4965_supported_rate_to_ie(pos, active_rates,
1305                                  active_rate_basic, &left);
1306         if (*pos > 0)
1307                 len += 2 + *pos;
1308
1309 #ifdef CONFIG_IWL4965_HT
1310         if (sband && sband->ht_info.ht_supported) {
1311                 struct ieee80211_ht_cap *ht_cap;
1312                 pos += (*pos) + 1;
1313                 *pos++ = WLAN_EID_HT_CAPABILITY;
1314                 *pos++ = sizeof(struct ieee80211_ht_cap);
1315                 ht_cap = (struct ieee80211_ht_cap *)pos;
1316                 ht_cap->cap_info = cpu_to_le16(sband->ht_info.cap);
1317                 memcpy(ht_cap->supp_mcs_set, sband->ht_info.supp_mcs_set, 16);
1318                 ht_cap->ampdu_params_info =(sband->ht_info.ampdu_factor &
1319                                             IEEE80211_HT_CAP_AMPDU_FACTOR) |
1320                                             ((sband->ht_info.ampdu_density << 2) &
1321                                             IEEE80211_HT_CAP_AMPDU_DENSITY);
1322                 len += 2 + sizeof(struct ieee80211_ht_cap);
1323         }
1324 #endif  /*CONFIG_IWL4965_HT */
1325
1326  fill_end:
1327         return (u16)len;
1328 }
1329
1330 /*
1331  * QoS  support
1332 */
1333 static int iwl4965_send_qos_params_command(struct iwl_priv *priv,
1334                                        struct iwl4965_qosparam_cmd *qos)
1335 {
1336
1337         return iwl_send_cmd_pdu(priv, REPLY_QOS_PARAM,
1338                                 sizeof(struct iwl4965_qosparam_cmd), qos);
1339 }
1340
1341 static void iwl4965_activate_qos(struct iwl_priv *priv, u8 force)
1342 {
1343         unsigned long flags;
1344
1345         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1346                 return;
1347
1348         if (!priv->qos_data.qos_enable)
1349                 return;
1350
1351         spin_lock_irqsave(&priv->lock, flags);
1352         priv->qos_data.def_qos_parm.qos_flags = 0;
1353
1354         if (priv->qos_data.qos_cap.q_AP.queue_request &&
1355             !priv->qos_data.qos_cap.q_AP.txop_request)
1356                 priv->qos_data.def_qos_parm.qos_flags |=
1357                         QOS_PARAM_FLG_TXOP_TYPE_MSK;
1358         if (priv->qos_data.qos_active)
1359                 priv->qos_data.def_qos_parm.qos_flags |=
1360                         QOS_PARAM_FLG_UPDATE_EDCA_MSK;
1361
1362 #ifdef CONFIG_IWL4965_HT
1363         if (priv->current_ht_config.is_ht)
1364                 priv->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
1365 #endif /* CONFIG_IWL4965_HT */
1366
1367         spin_unlock_irqrestore(&priv->lock, flags);
1368
1369         if (force || iwl_is_associated(priv)) {
1370                 IWL_DEBUG_QOS("send QoS cmd with Qos active=%d FLAGS=0x%X\n",
1371                                 priv->qos_data.qos_active,
1372                                 priv->qos_data.def_qos_parm.qos_flags);
1373
1374                 iwl4965_send_qos_params_command(priv,
1375                                 &(priv->qos_data.def_qos_parm));
1376         }
1377 }
1378
1379 /*
1380  * Power management (not Tx power!) functions
1381  */
1382 #define MSEC_TO_USEC 1024
1383
1384 #define NOSLP __constant_cpu_to_le16(0), 0, 0
1385 #define SLP IWL_POWER_DRIVER_ALLOW_SLEEP_MSK, 0, 0
1386 #define SLP_TIMEOUT(T) __constant_cpu_to_le32((T) * MSEC_TO_USEC)
1387 #define SLP_VEC(X0, X1, X2, X3, X4) {__constant_cpu_to_le32(X0), \
1388                                      __constant_cpu_to_le32(X1), \
1389                                      __constant_cpu_to_le32(X2), \
1390                                      __constant_cpu_to_le32(X3), \
1391                                      __constant_cpu_to_le32(X4)}
1392
1393
1394 /* default power management (not Tx power) table values */
1395 /* for tim  0-10 */
1396 static struct iwl4965_power_vec_entry range_0[IWL_POWER_AC] = {
1397         {{NOSLP, SLP_TIMEOUT(0), SLP_TIMEOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
1398         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(500), SLP_VEC(1, 2, 3, 4, 4)}, 0},
1399         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(300), SLP_VEC(2, 4, 6, 7, 7)}, 0},
1400         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(100), SLP_VEC(2, 6, 9, 9, 10)}, 0},
1401         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(25), SLP_VEC(2, 7, 9, 9, 10)}, 1},
1402         {{SLP, SLP_TIMEOUT(25), SLP_TIMEOUT(25), SLP_VEC(4, 7, 10, 10, 10)}, 1}
1403 };
1404
1405 /* for tim > 10 */
1406 static struct iwl4965_power_vec_entry range_1[IWL_POWER_AC] = {
1407         {{NOSLP, SLP_TIMEOUT(0), SLP_TIMEOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
1408         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(500),
1409                  SLP_VEC(1, 2, 3, 4, 0xFF)}, 0},
1410         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(300),
1411                  SLP_VEC(2, 4, 6, 7, 0xFF)}, 0},
1412         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(100),
1413                  SLP_VEC(2, 6, 9, 9, 0xFF)}, 0},
1414         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(25), SLP_VEC(2, 7, 9, 9, 0xFF)}, 0},
1415         {{SLP, SLP_TIMEOUT(25), SLP_TIMEOUT(25),
1416                  SLP_VEC(4, 7, 10, 10, 0xFF)}, 0}
1417 };
1418
1419 int iwl4965_power_init_handle(struct iwl_priv *priv)
1420 {
1421         int rc = 0, i;
1422         struct iwl4965_power_mgr *pow_data;
1423         int size = sizeof(struct iwl4965_power_vec_entry) * IWL_POWER_AC;
1424         u16 pci_pm;
1425
1426         IWL_DEBUG_POWER("Initialize power \n");
1427
1428         pow_data = &(priv->power_data);
1429
1430         memset(pow_data, 0, sizeof(*pow_data));
1431
1432         pow_data->active_index = IWL_POWER_RANGE_0;
1433         pow_data->dtim_val = 0xffff;
1434
1435         memcpy(&pow_data->pwr_range_0[0], &range_0[0], size);
1436         memcpy(&pow_data->pwr_range_1[0], &range_1[0], size);
1437
1438         rc = pci_read_config_word(priv->pci_dev, PCI_LINK_CTRL, &pci_pm);
1439         if (rc != 0)
1440                 return 0;
1441         else {
1442                 struct iwl4965_powertable_cmd *cmd;
1443
1444                 IWL_DEBUG_POWER("adjust power command flags\n");
1445
1446                 for (i = 0; i < IWL_POWER_AC; i++) {
1447                         cmd = &pow_data->pwr_range_0[i].cmd;
1448
1449                         if (pci_pm & 0x1)
1450                                 cmd->flags &= ~IWL_POWER_PCI_PM_MSK;
1451                         else
1452                                 cmd->flags |= IWL_POWER_PCI_PM_MSK;
1453                 }
1454         }
1455         return rc;
1456 }
1457
1458 static int iwl4965_update_power_cmd(struct iwl_priv *priv,
1459                                 struct iwl4965_powertable_cmd *cmd, u32 mode)
1460 {
1461         int rc = 0, i;
1462         u8 skip;
1463         u32 max_sleep = 0;
1464         struct iwl4965_power_vec_entry *range;
1465         u8 period = 0;
1466         struct iwl4965_power_mgr *pow_data;
1467
1468         if (mode > IWL_POWER_INDEX_5) {
1469                 IWL_DEBUG_POWER("Error invalid power mode \n");
1470                 return -1;
1471         }
1472         pow_data = &(priv->power_data);
1473
1474         if (pow_data->active_index == IWL_POWER_RANGE_0)
1475                 range = &pow_data->pwr_range_0[0];
1476         else
1477                 range = &pow_data->pwr_range_1[1];
1478
1479         memcpy(cmd, &range[mode].cmd, sizeof(struct iwl4965_powertable_cmd));
1480
1481 #ifdef IWL_MAC80211_DISABLE
1482         if (priv->assoc_network != NULL) {
1483                 unsigned long flags;
1484
1485                 period = priv->assoc_network->tim.tim_period;
1486         }
1487 #endif  /*IWL_MAC80211_DISABLE */
1488         skip = range[mode].no_dtim;
1489
1490         if (period == 0) {
1491                 period = 1;
1492                 skip = 0;
1493         }
1494
1495         if (skip == 0) {
1496                 max_sleep = period;
1497                 cmd->flags &= ~IWL_POWER_SLEEP_OVER_DTIM_MSK;
1498         } else {
1499                 __le32 slp_itrvl = cmd->sleep_interval[IWL_POWER_VEC_SIZE - 1];
1500                 max_sleep = (le32_to_cpu(slp_itrvl) / period) * period;
1501                 cmd->flags |= IWL_POWER_SLEEP_OVER_DTIM_MSK;
1502         }
1503
1504         for (i = 0; i < IWL_POWER_VEC_SIZE; i++) {
1505                 if (le32_to_cpu(cmd->sleep_interval[i]) > max_sleep)
1506                         cmd->sleep_interval[i] = cpu_to_le32(max_sleep);
1507         }
1508
1509         IWL_DEBUG_POWER("Flags value = 0x%08X\n", cmd->flags);
1510         IWL_DEBUG_POWER("Tx timeout = %u\n", le32_to_cpu(cmd->tx_data_timeout));
1511         IWL_DEBUG_POWER("Rx timeout = %u\n", le32_to_cpu(cmd->rx_data_timeout));
1512         IWL_DEBUG_POWER("Sleep interval vector = { %d , %d , %d , %d , %d }\n",
1513                         le32_to_cpu(cmd->sleep_interval[0]),
1514                         le32_to_cpu(cmd->sleep_interval[1]),
1515                         le32_to_cpu(cmd->sleep_interval[2]),
1516                         le32_to_cpu(cmd->sleep_interval[3]),
1517                         le32_to_cpu(cmd->sleep_interval[4]));
1518
1519         return rc;
1520 }
1521
1522 static int iwl4965_send_power_mode(struct iwl_priv *priv, u32 mode)
1523 {
1524         u32 uninitialized_var(final_mode);
1525         int rc;
1526         struct iwl4965_powertable_cmd cmd;
1527
1528         /* If on battery, set to 3,
1529          * if plugged into AC power, set to CAM ("continuously aware mode"),
1530          * else user level */
1531         switch (mode) {
1532         case IWL_POWER_BATTERY:
1533                 final_mode = IWL_POWER_INDEX_3;
1534                 break;
1535         case IWL_POWER_AC:
1536                 final_mode = IWL_POWER_MODE_CAM;
1537                 break;
1538         default:
1539                 final_mode = mode;
1540                 break;
1541         }
1542
1543         cmd.keep_alive_beacons = 0;
1544
1545         iwl4965_update_power_cmd(priv, &cmd, final_mode);
1546
1547         rc = iwl_send_cmd_pdu(priv, POWER_TABLE_CMD, sizeof(cmd), &cmd);
1548
1549         if (final_mode == IWL_POWER_MODE_CAM)
1550                 clear_bit(STATUS_POWER_PMI, &priv->status);
1551         else
1552                 set_bit(STATUS_POWER_PMI, &priv->status);
1553
1554         return rc;
1555 }
1556
1557 int iwl4965_is_network_packet(struct iwl_priv *priv, struct ieee80211_hdr *header)
1558 {
1559         /* Filter incoming packets to determine if they are targeted toward
1560          * this network, discarding packets coming from ourselves */
1561         switch (priv->iw_mode) {
1562         case IEEE80211_IF_TYPE_IBSS: /* Header: Dest. | Source    | BSSID */
1563                 /* packets from our adapter are dropped (echo) */
1564                 if (!compare_ether_addr(header->addr2, priv->mac_addr))
1565                         return 0;
1566                 /* {broad,multi}cast packets to our IBSS go through */
1567                 if (is_multicast_ether_addr(header->addr1))
1568                         return !compare_ether_addr(header->addr3, priv->bssid);
1569                 /* packets to our adapter go through */
1570                 return !compare_ether_addr(header->addr1, priv->mac_addr);
1571         case IEEE80211_IF_TYPE_STA: /* Header: Dest. | AP{BSSID} | Source */
1572                 /* packets from our adapter are dropped (echo) */
1573                 if (!compare_ether_addr(header->addr3, priv->mac_addr))
1574                         return 0;
1575                 /* {broad,multi}cast packets to our BSS go through */
1576                 if (is_multicast_ether_addr(header->addr1))
1577                         return !compare_ether_addr(header->addr2, priv->bssid);
1578                 /* packets to our adapter go through */
1579                 return !compare_ether_addr(header->addr1, priv->mac_addr);
1580         default:
1581                 break;
1582         }
1583
1584         return 1;
1585 }
1586
1587 #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
1588
1589 static const char *iwl4965_get_tx_fail_reason(u32 status)
1590 {
1591         switch (status & TX_STATUS_MSK) {
1592         case TX_STATUS_SUCCESS:
1593                 return "SUCCESS";
1594                 TX_STATUS_ENTRY(SHORT_LIMIT);
1595                 TX_STATUS_ENTRY(LONG_LIMIT);
1596                 TX_STATUS_ENTRY(FIFO_UNDERRUN);
1597                 TX_STATUS_ENTRY(MGMNT_ABORT);
1598                 TX_STATUS_ENTRY(NEXT_FRAG);
1599                 TX_STATUS_ENTRY(LIFE_EXPIRE);
1600                 TX_STATUS_ENTRY(DEST_PS);
1601                 TX_STATUS_ENTRY(ABORTED);
1602                 TX_STATUS_ENTRY(BT_RETRY);
1603                 TX_STATUS_ENTRY(STA_INVALID);
1604                 TX_STATUS_ENTRY(FRAG_DROPPED);
1605                 TX_STATUS_ENTRY(TID_DISABLE);
1606                 TX_STATUS_ENTRY(FRAME_FLUSHED);
1607                 TX_STATUS_ENTRY(INSUFFICIENT_CF_POLL);
1608                 TX_STATUS_ENTRY(TX_LOCKED);
1609                 TX_STATUS_ENTRY(NO_BEACON_ON_RADAR);
1610         }
1611
1612         return "UNKNOWN";
1613 }
1614
1615 /**
1616  * iwl4965_scan_cancel - Cancel any currently executing HW scan
1617  *
1618  * NOTE: priv->mutex is not required before calling this function
1619  */
1620 static int iwl4965_scan_cancel(struct iwl_priv *priv)
1621 {
1622         if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
1623                 clear_bit(STATUS_SCANNING, &priv->status);
1624                 return 0;
1625         }
1626
1627         if (test_bit(STATUS_SCANNING, &priv->status)) {
1628                 if (!test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
1629                         IWL_DEBUG_SCAN("Queuing scan abort.\n");
1630                         set_bit(STATUS_SCAN_ABORTING, &priv->status);
1631                         queue_work(priv->workqueue, &priv->abort_scan);
1632
1633                 } else
1634                         IWL_DEBUG_SCAN("Scan abort already in progress.\n");
1635
1636                 return test_bit(STATUS_SCANNING, &priv->status);
1637         }
1638
1639         return 0;
1640 }
1641
1642 /**
1643  * iwl4965_scan_cancel_timeout - Cancel any currently executing HW scan
1644  * @ms: amount of time to wait (in milliseconds) for scan to abort
1645  *
1646  * NOTE: priv->mutex must be held before calling this function
1647  */
1648 static int iwl4965_scan_cancel_timeout(struct iwl_priv *priv, unsigned long ms)
1649 {
1650         unsigned long now = jiffies;
1651         int ret;
1652
1653         ret = iwl4965_scan_cancel(priv);
1654         if (ret && ms) {
1655                 mutex_unlock(&priv->mutex);
1656                 while (!time_after(jiffies, now + msecs_to_jiffies(ms)) &&
1657                                 test_bit(STATUS_SCANNING, &priv->status))
1658                         msleep(1);
1659                 mutex_lock(&priv->mutex);
1660
1661                 return test_bit(STATUS_SCANNING, &priv->status);
1662         }
1663
1664         return ret;
1665 }
1666
1667 static void iwl4965_sequence_reset(struct iwl_priv *priv)
1668 {
1669         /* Reset ieee stats */
1670
1671         /* We don't reset the net_device_stats (ieee->stats) on
1672          * re-association */
1673
1674         priv->last_seq_num = -1;
1675         priv->last_frag_num = -1;
1676         priv->last_packet_time = 0;
1677
1678         iwl4965_scan_cancel(priv);
1679 }
1680
1681 #define MAX_UCODE_BEACON_INTERVAL       4096
1682 #define INTEL_CONN_LISTEN_INTERVAL      __constant_cpu_to_le16(0xA)
1683
1684 static __le16 iwl4965_adjust_beacon_interval(u16 beacon_val)
1685 {
1686         u16 new_val = 0;
1687         u16 beacon_factor = 0;
1688
1689         beacon_factor =
1690             (beacon_val + MAX_UCODE_BEACON_INTERVAL)
1691                 / MAX_UCODE_BEACON_INTERVAL;
1692         new_val = beacon_val / beacon_factor;
1693
1694         return cpu_to_le16(new_val);
1695 }
1696
1697 static void iwl4965_setup_rxon_timing(struct iwl_priv *priv)
1698 {
1699         u64 interval_tm_unit;
1700         u64 tsf, result;
1701         unsigned long flags;
1702         struct ieee80211_conf *conf = NULL;
1703         u16 beacon_int = 0;
1704
1705         conf = ieee80211_get_hw_conf(priv->hw);
1706
1707         spin_lock_irqsave(&priv->lock, flags);
1708         priv->rxon_timing.timestamp.dw[1] = cpu_to_le32(priv->timestamp >> 32);
1709         priv->rxon_timing.timestamp.dw[0] =
1710                                 cpu_to_le32(priv->timestamp & 0xFFFFFFFF);
1711
1712         priv->rxon_timing.listen_interval = INTEL_CONN_LISTEN_INTERVAL;
1713
1714         tsf = priv->timestamp;
1715
1716         beacon_int = priv->beacon_int;
1717         spin_unlock_irqrestore(&priv->lock, flags);
1718
1719         if (priv->iw_mode == IEEE80211_IF_TYPE_STA) {
1720                 if (beacon_int == 0) {
1721                         priv->rxon_timing.beacon_interval = cpu_to_le16(100);
1722                         priv->rxon_timing.beacon_init_val = cpu_to_le32(102400);
1723                 } else {
1724                         priv->rxon_timing.beacon_interval =
1725                                 cpu_to_le16(beacon_int);
1726                         priv->rxon_timing.beacon_interval =
1727                             iwl4965_adjust_beacon_interval(
1728                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
1729                 }
1730
1731                 priv->rxon_timing.atim_window = 0;
1732         } else {
1733                 priv->rxon_timing.beacon_interval =
1734                         iwl4965_adjust_beacon_interval(conf->beacon_int);
1735                 /* TODO: we need to get atim_window from upper stack
1736                  * for now we set to 0 */
1737                 priv->rxon_timing.atim_window = 0;
1738         }
1739
1740         interval_tm_unit =
1741                 (le16_to_cpu(priv->rxon_timing.beacon_interval) * 1024);
1742         result = do_div(tsf, interval_tm_unit);
1743         priv->rxon_timing.beacon_init_val =
1744             cpu_to_le32((u32) ((u64) interval_tm_unit - result));
1745
1746         IWL_DEBUG_ASSOC
1747             ("beacon interval %d beacon timer %d beacon tim %d\n",
1748                 le16_to_cpu(priv->rxon_timing.beacon_interval),
1749                 le32_to_cpu(priv->rxon_timing.beacon_init_val),
1750                 le16_to_cpu(priv->rxon_timing.atim_window));
1751 }
1752
1753 static int iwl4965_scan_initiate(struct iwl_priv *priv)
1754 {
1755         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
1756                 IWL_ERROR("APs don't scan.\n");
1757                 return 0;
1758         }
1759
1760         if (!iwl_is_ready_rf(priv)) {
1761                 IWL_DEBUG_SCAN("Aborting scan due to not ready.\n");
1762                 return -EIO;
1763         }
1764
1765         if (test_bit(STATUS_SCANNING, &priv->status)) {
1766                 IWL_DEBUG_SCAN("Scan already in progress.\n");
1767                 return -EAGAIN;
1768         }
1769
1770         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
1771                 IWL_DEBUG_SCAN("Scan request while abort pending.  "
1772                                "Queuing.\n");
1773                 return -EAGAIN;
1774         }
1775
1776         IWL_DEBUG_INFO("Starting scan...\n");
1777         priv->scan_bands = 2;
1778         set_bit(STATUS_SCANNING, &priv->status);
1779         priv->scan_start = jiffies;
1780         priv->scan_pass_start = priv->scan_start;
1781
1782         queue_work(priv->workqueue, &priv->request_scan);
1783
1784         return 0;
1785 }
1786
1787
1788 static void iwl4965_set_flags_for_phymode(struct iwl_priv *priv,
1789                                           enum ieee80211_band band)
1790 {
1791         if (band == IEEE80211_BAND_5GHZ) {
1792                 priv->staging_rxon.flags &=
1793                     ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
1794                       | RXON_FLG_CCK_MSK);
1795                 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
1796         } else {
1797                 /* Copied from iwl4965_post_associate() */
1798                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
1799                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
1800                 else
1801                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
1802
1803                 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
1804                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
1805
1806                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
1807                 priv->staging_rxon.flags |= RXON_FLG_AUTO_DETECT_MSK;
1808                 priv->staging_rxon.flags &= ~RXON_FLG_CCK_MSK;
1809         }
1810 }
1811
1812 /*
1813  * initialize rxon structure with default values from eeprom
1814  */
1815 static void iwl4965_connection_init_rx_config(struct iwl_priv *priv)
1816 {
1817         const struct iwl_channel_info *ch_info;
1818
1819         memset(&priv->staging_rxon, 0, sizeof(priv->staging_rxon));
1820
1821         switch (priv->iw_mode) {
1822         case IEEE80211_IF_TYPE_AP:
1823                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_AP;
1824                 break;
1825
1826         case IEEE80211_IF_TYPE_STA:
1827                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_ESS;
1828                 priv->staging_rxon.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
1829                 break;
1830
1831         case IEEE80211_IF_TYPE_IBSS:
1832                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_IBSS;
1833                 priv->staging_rxon.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
1834                 priv->staging_rxon.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
1835                                                   RXON_FILTER_ACCEPT_GRP_MSK;
1836                 break;
1837
1838         case IEEE80211_IF_TYPE_MNTR:
1839                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_SNIFFER;
1840                 priv->staging_rxon.filter_flags = RXON_FILTER_PROMISC_MSK |
1841                     RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_ACCEPT_GRP_MSK;
1842                 break;
1843         default:
1844                 IWL_ERROR("Unsupported interface type %d\n", priv->iw_mode);
1845                 break;
1846         }
1847
1848 #if 0
1849         /* TODO:  Figure out when short_preamble would be set and cache from
1850          * that */
1851         if (!hw_to_local(priv->hw)->short_preamble)
1852                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
1853         else
1854                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
1855 #endif
1856
1857         ch_info = iwl_get_channel_info(priv, priv->band,
1858                                        le16_to_cpu(priv->staging_rxon.channel));
1859
1860         if (!ch_info)
1861                 ch_info = &priv->channel_info[0];
1862
1863         /*
1864          * in some case A channels are all non IBSS
1865          * in this case force B/G channel
1866          */
1867         if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) &&
1868             !(is_channel_ibss(ch_info)))
1869                 ch_info = &priv->channel_info[0];
1870
1871         priv->staging_rxon.channel = cpu_to_le16(ch_info->channel);
1872         priv->band = ch_info->band;
1873
1874         iwl4965_set_flags_for_phymode(priv, priv->band);
1875
1876         priv->staging_rxon.ofdm_basic_rates =
1877             (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
1878         priv->staging_rxon.cck_basic_rates =
1879             (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
1880
1881         priv->staging_rxon.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED_MSK |
1882                                         RXON_FLG_CHANNEL_MODE_PURE_40_MSK);
1883         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
1884         memcpy(priv->staging_rxon.wlap_bssid_addr, priv->mac_addr, ETH_ALEN);
1885         priv->staging_rxon.ofdm_ht_single_stream_basic_rates = 0xff;
1886         priv->staging_rxon.ofdm_ht_dual_stream_basic_rates = 0xff;
1887         iwl4965_set_rxon_chain(priv);
1888 }
1889
1890 static int iwl4965_set_mode(struct iwl_priv *priv, int mode)
1891 {
1892         if (mode == IEEE80211_IF_TYPE_IBSS) {
1893                 const struct iwl_channel_info *ch_info;
1894
1895                 ch_info = iwl_get_channel_info(priv,
1896                         priv->band,
1897                         le16_to_cpu(priv->staging_rxon.channel));
1898
1899                 if (!ch_info || !is_channel_ibss(ch_info)) {
1900                         IWL_ERROR("channel %d not IBSS channel\n",
1901                                   le16_to_cpu(priv->staging_rxon.channel));
1902                         return -EINVAL;
1903                 }
1904         }
1905
1906         priv->iw_mode = mode;
1907
1908         iwl4965_connection_init_rx_config(priv);
1909         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
1910
1911         iwlcore_clear_stations_table(priv);
1912
1913         /* dont commit rxon if rf-kill is on*/
1914         if (!iwl_is_ready_rf(priv))
1915                 return -EAGAIN;
1916
1917         cancel_delayed_work(&priv->scan_check);
1918         if (iwl4965_scan_cancel_timeout(priv, 100)) {
1919                 IWL_WARNING("Aborted scan still in progress after 100ms\n");
1920                 IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
1921                 return -EAGAIN;
1922         }
1923
1924         iwl4965_commit_rxon(priv);
1925
1926         return 0;
1927 }
1928
1929 static void iwl4965_build_tx_cmd_hwcrypto(struct iwl_priv *priv,
1930                                       struct ieee80211_tx_control *ctl,
1931                                       struct iwl_cmd *cmd,
1932                                       struct sk_buff *skb_frag,
1933                                       int sta_id)
1934 {
1935         struct iwl4965_hw_key *keyinfo = &priv->stations[sta_id].keyinfo;
1936         struct iwl_wep_key *wepkey;
1937         int keyidx = 0;
1938
1939         BUG_ON(ctl->key_idx > 3);
1940
1941         switch (keyinfo->alg) {
1942         case ALG_CCMP:
1943                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_CCM;
1944                 memcpy(cmd->cmd.tx.key, keyinfo->key, keyinfo->keylen);
1945                 if (ctl->flags & IEEE80211_TXCTL_AMPDU)
1946                         cmd->cmd.tx.tx_flags |= TX_CMD_FLG_AGG_CCMP_MSK;
1947                 IWL_DEBUG_TX("tx_cmd with aes hwcrypto\n");
1948                 break;
1949
1950         case ALG_TKIP:
1951                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_TKIP;
1952                 ieee80211_get_tkip_key(keyinfo->conf, skb_frag,
1953                         IEEE80211_TKIP_P2_KEY, cmd->cmd.tx.key);
1954                 IWL_DEBUG_TX("tx_cmd with tkip hwcrypto\n");
1955                 break;
1956
1957         case ALG_WEP:
1958                 wepkey = &priv->wep_keys[ctl->key_idx];
1959                 cmd->cmd.tx.sec_ctl = 0;
1960                 if (priv->default_wep_key) {
1961                         /* the WEP key was sent as static */
1962                         keyidx = ctl->key_idx;
1963                         memcpy(&cmd->cmd.tx.key[3], wepkey->key,
1964                                                         wepkey->key_size);
1965                         if (wepkey->key_size == WEP_KEY_LEN_128)
1966                                 cmd->cmd.tx.sec_ctl |= TX_CMD_SEC_KEY128;
1967                 } else {
1968                         /* the WEP key was sent as dynamic */
1969                         keyidx = keyinfo->keyidx;
1970                         memcpy(&cmd->cmd.tx.key[3], keyinfo->key,
1971                                                         keyinfo->keylen);
1972                         if (keyinfo->keylen == WEP_KEY_LEN_128)
1973                                 cmd->cmd.tx.sec_ctl |= TX_CMD_SEC_KEY128;
1974                 }
1975
1976                 cmd->cmd.tx.sec_ctl |= (TX_CMD_SEC_WEP |
1977                         (keyidx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT);
1978
1979                 IWL_DEBUG_TX("Configuring packet for WEP encryption "
1980                              "with key %d\n", keyidx);
1981                 break;
1982
1983         default:
1984                 printk(KERN_ERR "Unknown encode alg %d\n", keyinfo->alg);
1985                 break;
1986         }
1987 }
1988
1989 /*
1990  * handle build REPLY_TX command notification.
1991  */
1992 static void iwl4965_build_tx_cmd_basic(struct iwl_priv *priv,
1993                                   struct iwl_cmd *cmd,
1994                                   struct ieee80211_tx_control *ctrl,
1995                                   struct ieee80211_hdr *hdr,
1996                                   int is_unicast, u8 std_id)
1997 {
1998         __le16 *qc;
1999         u16 fc = le16_to_cpu(hdr->frame_control);
2000         __le32 tx_flags = cmd->cmd.tx.tx_flags;
2001
2002         cmd->cmd.tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2003         if (!(ctrl->flags & IEEE80211_TXCTL_NO_ACK)) {
2004                 tx_flags |= TX_CMD_FLG_ACK_MSK;
2005                 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT)
2006                         tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2007                 if (ieee80211_is_probe_response(fc) &&
2008                     !(le16_to_cpu(hdr->seq_ctrl) & 0xf))
2009                         tx_flags |= TX_CMD_FLG_TSF_MSK;
2010         } else {
2011                 tx_flags &= (~TX_CMD_FLG_ACK_MSK);
2012                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2013         }
2014
2015         if (ieee80211_is_back_request(fc))
2016                 tx_flags |= TX_CMD_FLG_ACK_MSK | TX_CMD_FLG_IMM_BA_RSP_MASK;
2017
2018
2019         cmd->cmd.tx.sta_id = std_id;
2020         if (ieee80211_get_morefrag(hdr))
2021                 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
2022
2023         qc = ieee80211_get_qos_ctrl(hdr);
2024         if (qc) {
2025                 cmd->cmd.tx.tid_tspec = (u8) (le16_to_cpu(*qc) & 0xf);
2026                 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
2027         } else
2028                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2029
2030         if (ctrl->flags & IEEE80211_TXCTL_USE_RTS_CTS) {
2031                 tx_flags |= TX_CMD_FLG_RTS_MSK;
2032                 tx_flags &= ~TX_CMD_FLG_CTS_MSK;
2033         } else if (ctrl->flags & IEEE80211_TXCTL_USE_CTS_PROTECT) {
2034                 tx_flags &= ~TX_CMD_FLG_RTS_MSK;
2035                 tx_flags |= TX_CMD_FLG_CTS_MSK;
2036         }
2037
2038         if ((tx_flags & TX_CMD_FLG_RTS_MSK) || (tx_flags & TX_CMD_FLG_CTS_MSK))
2039                 tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
2040
2041         tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
2042         if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
2043                 if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_ASSOC_REQ ||
2044                     (fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_REASSOC_REQ)
2045                         cmd->cmd.tx.timeout.pm_frame_timeout = cpu_to_le16(3);
2046                 else
2047                         cmd->cmd.tx.timeout.pm_frame_timeout = cpu_to_le16(2);
2048         } else {
2049                 cmd->cmd.tx.timeout.pm_frame_timeout = 0;
2050         }
2051
2052         cmd->cmd.tx.driver_txop = 0;
2053         cmd->cmd.tx.tx_flags = tx_flags;
2054         cmd->cmd.tx.next_frame_len = 0;
2055 }
2056 static void iwl_update_tx_stats(struct iwl_priv *priv, u16 fc, u16 len)
2057 {
2058         /* 0 - mgmt, 1 - cnt, 2 - data */
2059         int idx = (fc & IEEE80211_FCTL_FTYPE) >> 2;
2060         priv->tx_stats[idx].cnt++;
2061         priv->tx_stats[idx].bytes += len;
2062 }
2063 /**
2064  * iwl4965_get_sta_id - Find station's index within station table
2065  *
2066  * If new IBSS station, create new entry in station table
2067  */
2068 static int iwl4965_get_sta_id(struct iwl_priv *priv,
2069                                 struct ieee80211_hdr *hdr)
2070 {
2071         int sta_id;
2072         u16 fc = le16_to_cpu(hdr->frame_control);
2073         DECLARE_MAC_BUF(mac);
2074
2075         /* If this frame is broadcast or management, use broadcast station id */
2076         if (((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA) ||
2077             is_multicast_ether_addr(hdr->addr1))
2078                 return priv->hw_params.bcast_sta_id;
2079
2080         switch (priv->iw_mode) {
2081
2082         /* If we are a client station in a BSS network, use the special
2083          * AP station entry (that's the only station we communicate with) */
2084         case IEEE80211_IF_TYPE_STA:
2085                 return IWL_AP_ID;
2086
2087         /* If we are an AP, then find the station, or use BCAST */
2088         case IEEE80211_IF_TYPE_AP:
2089                 sta_id = iwl4965_hw_find_station(priv, hdr->addr1);
2090                 if (sta_id != IWL_INVALID_STATION)
2091                         return sta_id;
2092                 return priv->hw_params.bcast_sta_id;
2093
2094         /* If this frame is going out to an IBSS network, find the station,
2095          * or create a new station table entry */
2096         case IEEE80211_IF_TYPE_IBSS:
2097                 sta_id = iwl4965_hw_find_station(priv, hdr->addr1);
2098                 if (sta_id != IWL_INVALID_STATION)
2099                         return sta_id;
2100
2101                 /* Create new station table entry */
2102                 sta_id = iwl4965_add_station_flags(priv, hdr->addr1,
2103                                                    0, CMD_ASYNC, NULL);
2104
2105                 if (sta_id != IWL_INVALID_STATION)
2106                         return sta_id;
2107
2108                 IWL_DEBUG_DROP("Station %s not in station map. "
2109                                "Defaulting to broadcast...\n",
2110                                print_mac(mac, hdr->addr1));
2111                 iwl_print_hex_dump(IWL_DL_DROP, (u8 *) hdr, sizeof(*hdr));
2112                 return priv->hw_params.bcast_sta_id;
2113
2114         default:
2115                 IWL_WARNING("Unknown mode of operation: %d", priv->iw_mode);
2116                 return priv->hw_params.bcast_sta_id;
2117         }
2118 }
2119
2120 /*
2121  * start REPLY_TX command process
2122  */
2123 static int iwl4965_tx_skb(struct iwl_priv *priv,
2124                       struct sk_buff *skb, struct ieee80211_tx_control *ctl)
2125 {
2126         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
2127         struct iwl4965_tfd_frame *tfd;
2128         u32 *control_flags;
2129         int txq_id = ctl->queue;
2130         struct iwl4965_tx_queue *txq = NULL;
2131         struct iwl4965_queue *q = NULL;
2132         dma_addr_t phys_addr;
2133         dma_addr_t txcmd_phys;
2134         dma_addr_t scratch_phys;
2135         struct iwl_cmd *out_cmd = NULL;
2136         u16 len, idx, len_org;
2137         u8 id, hdr_len, unicast;
2138         u8 sta_id;
2139         u16 seq_number = 0;
2140         u16 fc;
2141         __le16 *qc;
2142         u8 wait_write_ptr = 0;
2143         unsigned long flags;
2144         int rc;
2145
2146         spin_lock_irqsave(&priv->lock, flags);
2147         if (iwl_is_rfkill(priv)) {
2148                 IWL_DEBUG_DROP("Dropping - RF KILL\n");
2149                 goto drop_unlock;
2150         }
2151
2152         if (!priv->vif) {
2153                 IWL_DEBUG_DROP("Dropping - !priv->vif\n");
2154                 goto drop_unlock;
2155         }
2156
2157         if ((ctl->tx_rate->hw_value & 0xFF) == IWL_INVALID_RATE) {
2158                 IWL_ERROR("ERROR: No TX rate available.\n");
2159                 goto drop_unlock;
2160         }
2161
2162         unicast = !is_multicast_ether_addr(hdr->addr1);
2163         id = 0;
2164
2165         fc = le16_to_cpu(hdr->frame_control);
2166
2167 #ifdef CONFIG_IWLWIFI_DEBUG
2168         if (ieee80211_is_auth(fc))
2169                 IWL_DEBUG_TX("Sending AUTH frame\n");
2170         else if (ieee80211_is_assoc_request(fc))
2171                 IWL_DEBUG_TX("Sending ASSOC frame\n");
2172         else if (ieee80211_is_reassoc_request(fc))
2173                 IWL_DEBUG_TX("Sending REASSOC frame\n");
2174 #endif
2175
2176         /* drop all data frame if we are not associated */
2177         if (((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA) &&
2178            (!iwl_is_associated(priv) ||
2179             ((priv->iw_mode == IEEE80211_IF_TYPE_STA) && !priv->assoc_id) ||
2180             !priv->assoc_station_added)) {
2181                 IWL_DEBUG_DROP("Dropping - !iwl_is_associated\n");
2182                 goto drop_unlock;
2183         }
2184
2185         spin_unlock_irqrestore(&priv->lock, flags);
2186
2187         hdr_len = ieee80211_get_hdrlen(fc);
2188
2189         /* Find (or create) index into station table for destination station */
2190         sta_id = iwl4965_get_sta_id(priv, hdr);
2191         if (sta_id == IWL_INVALID_STATION) {
2192                 DECLARE_MAC_BUF(mac);
2193
2194                 IWL_DEBUG_DROP("Dropping - INVALID STATION: %s\n",
2195                                print_mac(mac, hdr->addr1));
2196                 goto drop;
2197         }
2198
2199         IWL_DEBUG_RATE("station Id %d\n", sta_id);
2200
2201         qc = ieee80211_get_qos_ctrl(hdr);
2202         if (qc) {
2203                 u8 tid = (u8)(le16_to_cpu(*qc) & 0xf);
2204                 seq_number = priv->stations[sta_id].tid[tid].seq_number &
2205                                 IEEE80211_SCTL_SEQ;
2206                 hdr->seq_ctrl = cpu_to_le16(seq_number) |
2207                         (hdr->seq_ctrl &
2208                                 __constant_cpu_to_le16(IEEE80211_SCTL_FRAG));
2209                 seq_number += 0x10;
2210 #ifdef CONFIG_IWL4965_HT
2211                 /* aggregation is on for this <sta,tid> */
2212                 if (ctl->flags & IEEE80211_TXCTL_AMPDU)
2213                         txq_id = priv->stations[sta_id].tid[tid].agg.txq_id;
2214                 priv->stations[sta_id].tid[tid].tfds_in_queue++;
2215 #endif /* CONFIG_IWL4965_HT */
2216         }
2217
2218         /* Descriptor for chosen Tx queue */
2219         txq = &priv->txq[txq_id];
2220         q = &txq->q;
2221
2222         spin_lock_irqsave(&priv->lock, flags);
2223
2224         /* Set up first empty TFD within this queue's circular TFD buffer */
2225         tfd = &txq->bd[q->write_ptr];
2226         memset(tfd, 0, sizeof(*tfd));
2227         control_flags = (u32 *) tfd;
2228         idx = get_cmd_index(q, q->write_ptr, 0);
2229
2230         /* Set up driver data for this TFD */
2231         memset(&(txq->txb[q->write_ptr]), 0, sizeof(struct iwl4965_tx_info));
2232         txq->txb[q->write_ptr].skb[0] = skb;
2233         memcpy(&(txq->txb[q->write_ptr].status.control),
2234                ctl, sizeof(struct ieee80211_tx_control));
2235
2236         /* Set up first empty entry in queue's array of Tx/cmd buffers */
2237         out_cmd = &txq->cmd[idx];
2238         memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
2239         memset(&out_cmd->cmd.tx, 0, sizeof(out_cmd->cmd.tx));
2240
2241         /*
2242          * Set up the Tx-command (not MAC!) header.
2243          * Store the chosen Tx queue and TFD index within the sequence field;
2244          * after Tx, uCode's Tx response will return this value so driver can
2245          * locate the frame within the tx queue and do post-tx processing.
2246          */
2247         out_cmd->hdr.cmd = REPLY_TX;
2248         out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
2249                                 INDEX_TO_SEQ(q->write_ptr)));
2250
2251         /* Copy MAC header from skb into command buffer */
2252         memcpy(out_cmd->cmd.tx.hdr, hdr, hdr_len);
2253
2254         /*
2255          * Use the first empty entry in this queue's command buffer array
2256          * to contain the Tx command and MAC header concatenated together
2257          * (payload data will be in another buffer).
2258          * Size of this varies, due to varying MAC header length.
2259          * If end is not dword aligned, we'll have 2 extra bytes at the end
2260          * of the MAC header (device reads on dword boundaries).
2261          * We'll tell device about this padding later.
2262          */
2263         len = priv->hw_params.tx_cmd_len +
2264                 sizeof(struct iwl_cmd_header) + hdr_len;
2265
2266         len_org = len;
2267         len = (len + 3) & ~3;
2268
2269         if (len_org != len)
2270                 len_org = 1;
2271         else
2272                 len_org = 0;
2273
2274         /* Physical address of this Tx command's header (not MAC header!),
2275          * within command buffer array. */
2276         txcmd_phys = txq->dma_addr_cmd + sizeof(struct iwl_cmd) * idx +
2277                      offsetof(struct iwl_cmd, hdr);
2278
2279         /* Add buffer containing Tx command and MAC(!) header to TFD's
2280          * first entry */
2281         iwl4965_hw_txq_attach_buf_to_tfd(priv, tfd, txcmd_phys, len);
2282
2283         if (!(ctl->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT))
2284                 iwl4965_build_tx_cmd_hwcrypto(priv, ctl, out_cmd, skb, sta_id);
2285
2286         /* Set up TFD's 2nd entry to point directly to remainder of skb,
2287          * if any (802.11 null frames have no payload). */
2288         len = skb->len - hdr_len;
2289         if (len) {
2290                 phys_addr = pci_map_single(priv->pci_dev, skb->data + hdr_len,
2291                                            len, PCI_DMA_TODEVICE);
2292                 iwl4965_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, len);
2293         }
2294
2295         /* Tell 4965 about any 2-byte padding after MAC header */
2296         if (len_org)
2297                 out_cmd->cmd.tx.tx_flags |= TX_CMD_FLG_MH_PAD_MSK;
2298
2299         /* Total # bytes to be transmitted */
2300         len = (u16)skb->len;
2301         out_cmd->cmd.tx.len = cpu_to_le16(len);
2302
2303         /* TODO need this for burst mode later on */
2304         iwl4965_build_tx_cmd_basic(priv, out_cmd, ctl, hdr, unicast, sta_id);
2305
2306         /* set is_hcca to 0; it probably will never be implemented */
2307         iwl4965_hw_build_tx_cmd_rate(priv, out_cmd, ctl, hdr, sta_id, 0);
2308
2309         iwl_update_tx_stats(priv, fc, len);
2310
2311         scratch_phys = txcmd_phys + sizeof(struct iwl_cmd_header) +
2312                 offsetof(struct iwl4965_tx_cmd, scratch);
2313         out_cmd->cmd.tx.dram_lsb_ptr = cpu_to_le32(scratch_phys);
2314         out_cmd->cmd.tx.dram_msb_ptr = iwl_get_dma_hi_address(scratch_phys);
2315
2316         if (!ieee80211_get_morefrag(hdr)) {
2317                 txq->need_update = 1;
2318                 if (qc) {
2319                         u8 tid = (u8)(le16_to_cpu(*qc) & 0xf);
2320                         priv->stations[sta_id].tid[tid].seq_number = seq_number;
2321                 }
2322         } else {
2323                 wait_write_ptr = 1;
2324                 txq->need_update = 0;
2325         }
2326
2327         iwl_print_hex_dump(IWL_DL_TX, out_cmd->cmd.payload,
2328                            sizeof(out_cmd->cmd.tx));
2329
2330         iwl_print_hex_dump(IWL_DL_TX, (u8 *)out_cmd->cmd.tx.hdr,
2331                            ieee80211_get_hdrlen(fc));
2332
2333         /* Set up entry for this TFD in Tx byte-count array */
2334         priv->cfg->ops->lib->txq_update_byte_cnt_tbl(priv, txq, len);
2335
2336         /* Tell device the write index *just past* this latest filled TFD */
2337         q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
2338         rc = iwl4965_tx_queue_update_write_ptr(priv, txq);
2339         spin_unlock_irqrestore(&priv->lock, flags);
2340
2341         if (rc)
2342                 return rc;
2343
2344         if ((iwl4965_queue_space(q) < q->high_mark)
2345             && priv->mac80211_registered) {
2346                 if (wait_write_ptr) {
2347                         spin_lock_irqsave(&priv->lock, flags);
2348                         txq->need_update = 1;
2349                         iwl4965_tx_queue_update_write_ptr(priv, txq);
2350                         spin_unlock_irqrestore(&priv->lock, flags);
2351                 }
2352
2353                 ieee80211_stop_queue(priv->hw, ctl->queue);
2354         }
2355
2356         return 0;
2357
2358 drop_unlock:
2359         spin_unlock_irqrestore(&priv->lock, flags);
2360 drop:
2361         return -1;
2362 }
2363
2364 static void iwl4965_set_rate(struct iwl_priv *priv)
2365 {
2366         const struct ieee80211_supported_band *hw = NULL;
2367         struct ieee80211_rate *rate;
2368         int i;
2369
2370         hw = iwl4965_get_hw_mode(priv, priv->band);
2371         if (!hw) {
2372                 IWL_ERROR("Failed to set rate: unable to get hw mode\n");
2373                 return;
2374         }
2375
2376         priv->active_rate = 0;
2377         priv->active_rate_basic = 0;
2378
2379         for (i = 0; i < hw->n_bitrates; i++) {
2380                 rate = &(hw->bitrates[i]);
2381                 if (rate->hw_value < IWL_RATE_COUNT)
2382                         priv->active_rate |= (1 << rate->hw_value);
2383         }
2384
2385         IWL_DEBUG_RATE("Set active_rate = %0x, active_rate_basic = %0x\n",
2386                        priv->active_rate, priv->active_rate_basic);
2387
2388         /*
2389          * If a basic rate is configured, then use it (adding IWL_RATE_1M_MASK)
2390          * otherwise set it to the default of all CCK rates and 6, 12, 24 for
2391          * OFDM
2392          */
2393         if (priv->active_rate_basic & IWL_CCK_BASIC_RATES_MASK)
2394                 priv->staging_rxon.cck_basic_rates =
2395                     ((priv->active_rate_basic &
2396                       IWL_CCK_RATES_MASK) >> IWL_FIRST_CCK_RATE) & 0xF;
2397         else
2398                 priv->staging_rxon.cck_basic_rates =
2399                     (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
2400
2401         if (priv->active_rate_basic & IWL_OFDM_BASIC_RATES_MASK)
2402                 priv->staging_rxon.ofdm_basic_rates =
2403                     ((priv->active_rate_basic &
2404                       (IWL_OFDM_BASIC_RATES_MASK | IWL_RATE_6M_MASK)) >>
2405                       IWL_FIRST_OFDM_RATE) & 0xFF;
2406         else
2407                 priv->staging_rxon.ofdm_basic_rates =
2408                    (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
2409 }
2410
2411 void iwl4965_radio_kill_sw(struct iwl_priv *priv, int disable_radio)
2412 {
2413         unsigned long flags;
2414
2415         if (!!disable_radio == test_bit(STATUS_RF_KILL_SW, &priv->status))
2416                 return;
2417
2418         IWL_DEBUG_RF_KILL("Manual SW RF KILL set to: RADIO %s\n",
2419                           disable_radio ? "OFF" : "ON");
2420
2421         if (disable_radio) {
2422                 iwl4965_scan_cancel(priv);
2423                 /* FIXME: This is a workaround for AP */
2424                 if (priv->iw_mode != IEEE80211_IF_TYPE_AP) {
2425                         spin_lock_irqsave(&priv->lock, flags);
2426                         iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
2427                                     CSR_UCODE_SW_BIT_RFKILL);
2428                         spin_unlock_irqrestore(&priv->lock, flags);
2429                         /* call the host command only if no hw rf-kill set */
2430                         if (!test_bit(STATUS_RF_KILL_HW, &priv->status) &&
2431                             iwl_is_ready(priv))
2432                                 iwl4965_send_card_state(priv,
2433                                                         CARD_STATE_CMD_DISABLE,
2434                                                         0);
2435                         set_bit(STATUS_RF_KILL_SW, &priv->status);
2436
2437                         /* make sure mac80211 stop sending Tx frame */
2438                         if (priv->mac80211_registered)
2439                                 ieee80211_stop_queues(priv->hw);
2440                 }
2441                 return;
2442         }
2443
2444         spin_lock_irqsave(&priv->lock, flags);
2445         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2446
2447         clear_bit(STATUS_RF_KILL_SW, &priv->status);
2448         spin_unlock_irqrestore(&priv->lock, flags);
2449
2450         /* wake up ucode */
2451         msleep(10);
2452
2453         spin_lock_irqsave(&priv->lock, flags);
2454         iwl_read32(priv, CSR_UCODE_DRV_GP1);
2455         if (!iwl_grab_nic_access(priv))
2456                 iwl_release_nic_access(priv);
2457         spin_unlock_irqrestore(&priv->lock, flags);
2458
2459         if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
2460                 IWL_DEBUG_RF_KILL("Can not turn radio back on - "
2461                                   "disabled by HW switch\n");
2462                 return;
2463         }
2464
2465         queue_work(priv->workqueue, &priv->restart);
2466         return;
2467 }
2468
2469 void iwl4965_set_decrypted_flag(struct iwl_priv *priv, struct sk_buff *skb,
2470                             u32 decrypt_res, struct ieee80211_rx_status *stats)
2471 {
2472         u16 fc =
2473             le16_to_cpu(((struct ieee80211_hdr *)skb->data)->frame_control);
2474
2475         if (priv->active_rxon.filter_flags & RXON_FILTER_DIS_DECRYPT_MSK)
2476                 return;
2477
2478         if (!(fc & IEEE80211_FCTL_PROTECTED))
2479                 return;
2480
2481         IWL_DEBUG_RX("decrypt_res:0x%x\n", decrypt_res);
2482         switch (decrypt_res & RX_RES_STATUS_SEC_TYPE_MSK) {
2483         case RX_RES_STATUS_SEC_TYPE_TKIP:
2484                 /* The uCode has got a bad phase 1 Key, pushes the packet.
2485                  * Decryption will be done in SW. */
2486                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2487                     RX_RES_STATUS_BAD_KEY_TTAK)
2488                         break;
2489
2490                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2491                     RX_RES_STATUS_BAD_ICV_MIC)
2492                         stats->flag |= RX_FLAG_MMIC_ERROR;
2493         case RX_RES_STATUS_SEC_TYPE_WEP:
2494         case RX_RES_STATUS_SEC_TYPE_CCMP:
2495                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2496                     RX_RES_STATUS_DECRYPT_OK) {
2497                         IWL_DEBUG_RX("hw decrypt successfully!!!\n");
2498                         stats->flag |= RX_FLAG_DECRYPTED;
2499                 }
2500                 break;
2501
2502         default:
2503                 break;
2504         }
2505 }
2506
2507
2508 #define IWL_PACKET_RETRY_TIME HZ
2509
2510 int iwl4965_is_duplicate_packet(struct iwl_priv *priv, struct ieee80211_hdr *header)
2511 {
2512         u16 sc = le16_to_cpu(header->seq_ctrl);
2513         u16 seq = (sc & IEEE80211_SCTL_SEQ) >> 4;
2514         u16 frag = sc & IEEE80211_SCTL_FRAG;
2515         u16 *last_seq, *last_frag;
2516         unsigned long *last_time;
2517
2518         switch (priv->iw_mode) {
2519         case IEEE80211_IF_TYPE_IBSS:{
2520                 struct list_head *p;
2521                 struct iwl4965_ibss_seq *entry = NULL;
2522                 u8 *mac = header->addr2;
2523                 int index = mac[5] & (IWL_IBSS_MAC_HASH_SIZE - 1);
2524
2525                 __list_for_each(p, &priv->ibss_mac_hash[index]) {
2526                         entry = list_entry(p, struct iwl4965_ibss_seq, list);
2527                         if (!compare_ether_addr(entry->mac, mac))
2528                                 break;
2529                 }
2530                 if (p == &priv->ibss_mac_hash[index]) {
2531                         entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
2532                         if (!entry) {
2533                                 IWL_ERROR("Cannot malloc new mac entry\n");
2534                                 return 0;
2535                         }
2536                         memcpy(entry->mac, mac, ETH_ALEN);
2537                         entry->seq_num = seq;
2538                         entry->frag_num = frag;
2539                         entry->packet_time = jiffies;
2540                         list_add(&entry->list, &priv->ibss_mac_hash[index]);
2541                         return 0;
2542                 }
2543                 last_seq = &entry->seq_num;
2544                 last_frag = &entry->frag_num;
2545                 last_time = &entry->packet_time;
2546                 break;
2547         }
2548         case IEEE80211_IF_TYPE_STA:
2549                 last_seq = &priv->last_seq_num;
2550                 last_frag = &priv->last_frag_num;
2551                 last_time = &priv->last_packet_time;
2552                 break;
2553         default:
2554                 return 0;
2555         }
2556         if ((*last_seq == seq) &&
2557             time_after(*last_time + IWL_PACKET_RETRY_TIME, jiffies)) {
2558                 if (*last_frag == frag)
2559                         goto drop;
2560                 if (*last_frag + 1 != frag)
2561                         /* out-of-order fragment */
2562                         goto drop;
2563         } else
2564                 *last_seq = seq;
2565
2566         *last_frag = frag;
2567         *last_time = jiffies;
2568         return 0;
2569
2570  drop:
2571         return 1;
2572 }
2573
2574 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
2575
2576 #include "iwl-spectrum.h"
2577
2578 #define BEACON_TIME_MASK_LOW    0x00FFFFFF
2579 #define BEACON_TIME_MASK_HIGH   0xFF000000
2580 #define TIME_UNIT               1024
2581
2582 /*
2583  * extended beacon time format
2584  * time in usec will be changed into a 32-bit value in 8:24 format
2585  * the high 1 byte is the beacon counts
2586  * the lower 3 bytes is the time in usec within one beacon interval
2587  */
2588
2589 static u32 iwl4965_usecs_to_beacons(u32 usec, u32 beacon_interval)
2590 {
2591         u32 quot;
2592         u32 rem;
2593         u32 interval = beacon_interval * 1024;
2594
2595         if (!interval || !usec)
2596                 return 0;
2597
2598         quot = (usec / interval) & (BEACON_TIME_MASK_HIGH >> 24);
2599         rem = (usec % interval) & BEACON_TIME_MASK_LOW;
2600
2601         return (quot << 24) + rem;
2602 }
2603
2604 /* base is usually what we get from ucode with each received frame,
2605  * the same as HW timer counter counting down
2606  */
2607
2608 static __le32 iwl4965_add_beacon_time(u32 base, u32 addon, u32 beacon_interval)
2609 {
2610         u32 base_low = base & BEACON_TIME_MASK_LOW;
2611         u32 addon_low = addon & BEACON_TIME_MASK_LOW;
2612         u32 interval = beacon_interval * TIME_UNIT;
2613         u32 res = (base & BEACON_TIME_MASK_HIGH) +
2614             (addon & BEACON_TIME_MASK_HIGH);
2615
2616         if (base_low > addon_low)
2617                 res += base_low - addon_low;
2618         else if (base_low < addon_low) {
2619                 res += interval + base_low - addon_low;
2620                 res += (1 << 24);
2621         } else
2622                 res += (1 << 24);
2623
2624         return cpu_to_le32(res);
2625 }
2626
2627 static int iwl4965_get_measurement(struct iwl_priv *priv,
2628                                struct ieee80211_measurement_params *params,
2629                                u8 type)
2630 {
2631         struct iwl4965_spectrum_cmd spectrum;
2632         struct iwl4965_rx_packet *res;
2633         struct iwl_host_cmd cmd = {
2634                 .id = REPLY_SPECTRUM_MEASUREMENT_CMD,
2635                 .data = (void *)&spectrum,
2636                 .meta.flags = CMD_WANT_SKB,
2637         };
2638         u32 add_time = le64_to_cpu(params->start_time);
2639         int rc;
2640         int spectrum_resp_status;
2641         int duration = le16_to_cpu(params->duration);
2642
2643         if (iwl_is_associated(priv))
2644                 add_time =
2645                     iwl4965_usecs_to_beacons(
2646                         le64_to_cpu(params->start_time) - priv->last_tsf,
2647                         le16_to_cpu(priv->rxon_timing.beacon_interval));
2648
2649         memset(&spectrum, 0, sizeof(spectrum));
2650
2651         spectrum.channel_count = cpu_to_le16(1);
2652         spectrum.flags =
2653             RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
2654         spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
2655         cmd.len = sizeof(spectrum);
2656         spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
2657
2658         if (iwl_is_associated(priv))
2659                 spectrum.start_time =
2660                     iwl4965_add_beacon_time(priv->last_beacon_time,
2661                                 add_time,
2662                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
2663         else
2664                 spectrum.start_time = 0;
2665
2666         spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
2667         spectrum.channels[0].channel = params->channel;
2668         spectrum.channels[0].type = type;
2669         if (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK)
2670                 spectrum.flags |= RXON_FLG_BAND_24G_MSK |
2671                     RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK;
2672
2673         rc = iwl_send_cmd_sync(priv, &cmd);
2674         if (rc)
2675                 return rc;
2676
2677         res = (struct iwl4965_rx_packet *)cmd.meta.u.skb->data;
2678         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
2679                 IWL_ERROR("Bad return from REPLY_RX_ON_ASSOC command\n");
2680                 rc = -EIO;
2681         }
2682
2683         spectrum_resp_status = le16_to_cpu(res->u.spectrum.status);
2684         switch (spectrum_resp_status) {
2685         case 0:         /* Command will be handled */
2686                 if (res->u.spectrum.id != 0xff) {
2687                         IWL_DEBUG_INFO
2688                             ("Replaced existing measurement: %d\n",
2689                              res->u.spectrum.id);
2690                         priv->measurement_status &= ~MEASUREMENT_READY;
2691                 }
2692                 priv->measurement_status |= MEASUREMENT_ACTIVE;
2693                 rc = 0;
2694                 break;
2695
2696         case 1:         /* Command will not be handled */
2697                 rc = -EAGAIN;
2698                 break;
2699         }
2700
2701         dev_kfree_skb_any(cmd.meta.u.skb);
2702
2703         return rc;
2704 }
2705 #endif
2706
2707 static void iwl4965_txstatus_to_ieee(struct iwl_priv *priv,
2708                                  struct iwl4965_tx_info *tx_sta)
2709 {
2710
2711         tx_sta->status.ack_signal = 0;
2712         tx_sta->status.excessive_retries = 0;
2713         tx_sta->status.queue_length = 0;
2714         tx_sta->status.queue_number = 0;
2715
2716         if (in_interrupt())
2717                 ieee80211_tx_status_irqsafe(priv->hw,
2718                                             tx_sta->skb[0], &(tx_sta->status));
2719         else
2720                 ieee80211_tx_status(priv->hw,
2721                                     tx_sta->skb[0], &(tx_sta->status));
2722
2723         tx_sta->skb[0] = NULL;
2724 }
2725
2726 /**
2727  * iwl4965_tx_queue_reclaim - Reclaim Tx queue entries already Tx'd
2728  *
2729  * When FW advances 'R' index, all entries between old and new 'R' index
2730  * need to be reclaimed. As result, some free space forms.  If there is
2731  * enough free space (> low mark), wake the stack that feeds us.
2732  */
2733 int iwl4965_tx_queue_reclaim(struct iwl_priv *priv, int txq_id, int index)
2734 {
2735         struct iwl4965_tx_queue *txq = &priv->txq[txq_id];
2736         struct iwl4965_queue *q = &txq->q;
2737         int nfreed = 0;
2738
2739         if ((index >= q->n_bd) || (x2_queue_used(q, index) == 0)) {
2740                 IWL_ERROR("Read index for DMA queue txq id (%d), index %d, "
2741                           "is out of range [0-%d] %d %d.\n", txq_id,
2742                           index, q->n_bd, q->write_ptr, q->read_ptr);
2743                 return 0;
2744         }
2745
2746         for (index = iwl_queue_inc_wrap(index, q->n_bd);
2747                 q->read_ptr != index;
2748                 q->read_ptr = iwl_queue_inc_wrap(q->read_ptr, q->n_bd)) {
2749                 if (txq_id != IWL_CMD_QUEUE_NUM) {
2750                         iwl4965_txstatus_to_ieee(priv,
2751                                         &(txq->txb[txq->q.read_ptr]));
2752                         iwl4965_hw_txq_free_tfd(priv, txq);
2753                 } else if (nfreed > 1) {
2754                         IWL_ERROR("HCMD skipped: index (%d) %d %d\n", index,
2755                                         q->write_ptr, q->read_ptr);
2756                         queue_work(priv->workqueue, &priv->restart);
2757                 }
2758                 nfreed++;
2759         }
2760
2761 /*      if (iwl4965_queue_space(q) > q->low_mark && (txq_id >= 0) &&
2762                         (txq_id != IWL_CMD_QUEUE_NUM) &&
2763                         priv->mac80211_registered)
2764                 ieee80211_wake_queue(priv->hw, txq_id); */
2765
2766
2767         return nfreed;
2768 }
2769
2770 static int iwl4965_is_tx_success(u32 status)
2771 {
2772         status &= TX_STATUS_MSK;
2773         return (status == TX_STATUS_SUCCESS)
2774             || (status == TX_STATUS_DIRECT_DONE);
2775 }
2776
2777 /******************************************************************************
2778  *
2779  * Generic RX handler implementations
2780  *
2781  ******************************************************************************/
2782 #ifdef CONFIG_IWL4965_HT
2783
2784 static inline int iwl4965_get_ra_sta_id(struct iwl_priv *priv,
2785                                     struct ieee80211_hdr *hdr)
2786 {
2787         if (priv->iw_mode == IEEE80211_IF_TYPE_STA)
2788                 return IWL_AP_ID;
2789         else {
2790                 u8 *da = ieee80211_get_DA(hdr);
2791                 return iwl4965_hw_find_station(priv, da);
2792         }
2793 }
2794
2795 static struct ieee80211_hdr *iwl4965_tx_queue_get_hdr(
2796         struct iwl_priv *priv, int txq_id, int idx)
2797 {
2798         if (priv->txq[txq_id].txb[idx].skb[0])
2799                 return (struct ieee80211_hdr *)priv->txq[txq_id].
2800                                 txb[idx].skb[0]->data;
2801         return NULL;
2802 }
2803
2804 static inline u32 iwl4965_get_scd_ssn(struct iwl4965_tx_resp *tx_resp)
2805 {
2806         __le32 *scd_ssn = (__le32 *)((u32 *)&tx_resp->status +
2807                                 tx_resp->frame_count);
2808         return le32_to_cpu(*scd_ssn) & MAX_SN;
2809
2810 }
2811
2812 /**
2813  * iwl4965_tx_status_reply_tx - Handle Tx rspnse for frames in aggregation queue
2814  */
2815 static int iwl4965_tx_status_reply_tx(struct iwl_priv *priv,
2816                                       struct iwl4965_ht_agg *agg,
2817                                       struct iwl4965_tx_resp_agg *tx_resp,
2818                                       u16 start_idx)
2819 {
2820         u16 status;
2821         struct agg_tx_status *frame_status = &tx_resp->status;
2822         struct ieee80211_tx_status *tx_status = NULL;
2823         struct ieee80211_hdr *hdr = NULL;
2824         int i, sh;
2825         int txq_id, idx;
2826         u16 seq;
2827
2828         if (agg->wait_for_ba)
2829                 IWL_DEBUG_TX_REPLY("got tx response w/o block-ack\n");
2830
2831         agg->frame_count = tx_resp->frame_count;
2832         agg->start_idx = start_idx;
2833         agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
2834         agg->bitmap = 0;
2835
2836         /* # frames attempted by Tx command */
2837         if (agg->frame_count == 1) {
2838                 /* Only one frame was attempted; no block-ack will arrive */
2839                 status = le16_to_cpu(frame_status[0].status);
2840                 seq  = le16_to_cpu(frame_status[0].sequence);
2841                 idx = SEQ_TO_INDEX(seq);
2842                 txq_id = SEQ_TO_QUEUE(seq);
2843
2844                 /* FIXME: code repetition */
2845                 IWL_DEBUG_TX_REPLY("FrameCnt = %d, StartIdx=%d idx=%d\n",
2846                                    agg->frame_count, agg->start_idx, idx);
2847
2848                 tx_status = &(priv->txq[txq_id].txb[idx].status);
2849                 tx_status->retry_count = tx_resp->failure_frame;
2850                 tx_status->queue_number = status & 0xff;
2851                 tx_status->queue_length = tx_resp->failure_rts;
2852                 tx_status->control.flags &= ~IEEE80211_TXCTL_AMPDU;
2853                 tx_status->flags = iwl4965_is_tx_success(status)?
2854                         IEEE80211_TX_STATUS_ACK : 0;
2855                 iwl4965_hwrate_to_tx_control(priv,
2856                                              le32_to_cpu(tx_resp->rate_n_flags),
2857                                              &tx_status->control);
2858                 /* FIXME: code repetition end */
2859
2860                 IWL_DEBUG_TX_REPLY("1 Frame 0x%x failure :%d\n",
2861                                     status & 0xff, tx_resp->failure_frame);
2862                 IWL_DEBUG_TX_REPLY("Rate Info rate_n_flags=%x\n",
2863                                 iwl4965_hw_get_rate_n_flags(tx_resp->rate_n_flags));
2864
2865                 agg->wait_for_ba = 0;
2866         } else {
2867                 /* Two or more frames were attempted; expect block-ack */
2868                 u64 bitmap = 0;
2869                 int start = agg->start_idx;
2870
2871                 /* Construct bit-map of pending frames within Tx window */
2872                 for (i = 0; i < agg->frame_count; i++) {
2873                         u16 sc;
2874                         status = le16_to_cpu(frame_status[i].status);
2875                         seq  = le16_to_cpu(frame_status[i].sequence);
2876                         idx = SEQ_TO_INDEX(seq);
2877                         txq_id = SEQ_TO_QUEUE(seq);
2878
2879                         if (status & (AGG_TX_STATE_FEW_BYTES_MSK |
2880                                       AGG_TX_STATE_ABORT_MSK))
2881                                 continue;
2882
2883                         IWL_DEBUG_TX_REPLY("FrameCnt = %d, txq_id=%d idx=%d\n",
2884                                            agg->frame_count, txq_id, idx);
2885
2886                         hdr = iwl4965_tx_queue_get_hdr(priv, txq_id, idx);
2887
2888                         sc = le16_to_cpu(hdr->seq_ctrl);
2889                         if (idx != (SEQ_TO_SN(sc) & 0xff)) {
2890                                 IWL_ERROR("BUG_ON idx doesn't match seq control"
2891                                           " idx=%d, seq_idx=%d, seq=%d\n",
2892                                           idx, SEQ_TO_SN(sc),
2893                                           hdr->seq_ctrl);
2894                                 return -1;
2895                         }
2896
2897                         IWL_DEBUG_TX_REPLY("AGG Frame i=%d idx %d seq=%d\n",
2898                                            i, idx, SEQ_TO_SN(sc));
2899
2900                         sh = idx - start;
2901                         if (sh > 64) {
2902                                 sh = (start - idx) + 0xff;
2903                                 bitmap = bitmap << sh;
2904                                 sh = 0;
2905                                 start = idx;
2906                         } else if (sh < -64)
2907                                 sh  = 0xff - (start - idx);
2908                         else if (sh < 0) {
2909                                 sh = start - idx;
2910                                 start = idx;
2911                                 bitmap = bitmap << sh;
2912                                 sh = 0;
2913                         }
2914                         bitmap |= (1 << sh);
2915                         IWL_DEBUG_TX_REPLY("start=%d bitmap=0x%x\n",
2916                                            start, (u32)(bitmap & 0xFFFFFFFF));
2917                 }
2918
2919                 agg->bitmap = bitmap;
2920                 agg->start_idx = start;
2921                 agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
2922                 IWL_DEBUG_TX_REPLY("Frames %d start_idx=%d bitmap=0x%llx\n",
2923                                    agg->frame_count, agg->start_idx,
2924                                    (unsigned long long)agg->bitmap);
2925
2926                 if (bitmap)
2927                         agg->wait_for_ba = 1;
2928         }
2929         return 0;
2930 }
2931 #endif
2932
2933 /**
2934  * iwl4965_rx_reply_tx - Handle standard (non-aggregation) Tx response
2935  */
2936 static void iwl4965_rx_reply_tx(struct iwl_priv *priv,
2937                             struct iwl4965_rx_mem_buffer *rxb)
2938 {
2939         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
2940         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
2941         int txq_id = SEQ_TO_QUEUE(sequence);
2942         int index = SEQ_TO_INDEX(sequence);
2943         struct iwl4965_tx_queue *txq = &priv->txq[txq_id];
2944         struct ieee80211_tx_status *tx_status;
2945         struct iwl4965_tx_resp *tx_resp = (void *)&pkt->u.raw[0];
2946         u32  status = le32_to_cpu(tx_resp->status);
2947 #ifdef CONFIG_IWL4965_HT
2948         int tid = MAX_TID_COUNT, sta_id = IWL_INVALID_STATION;
2949         struct ieee80211_hdr *hdr;
2950         __le16 *qc;
2951 #endif
2952
2953         if ((index >= txq->q.n_bd) || (x2_queue_used(&txq->q, index) == 0)) {
2954                 IWL_ERROR("Read index for DMA queue txq_id (%d) index %d "
2955                           "is out of range [0-%d] %d %d\n", txq_id,
2956                           index, txq->q.n_bd, txq->q.write_ptr,
2957                           txq->q.read_ptr);
2958                 return;
2959         }
2960
2961 #ifdef CONFIG_IWL4965_HT
2962         hdr = iwl4965_tx_queue_get_hdr(priv, txq_id, index);
2963         qc = ieee80211_get_qos_ctrl(hdr);
2964
2965         if (qc)
2966                 tid = le16_to_cpu(*qc) & 0xf;
2967
2968         sta_id = iwl4965_get_ra_sta_id(priv, hdr);
2969         if (txq->sched_retry && unlikely(sta_id == IWL_INVALID_STATION)) {
2970                 IWL_ERROR("Station not known\n");
2971                 return;
2972         }
2973
2974         if (txq->sched_retry) {
2975                 const u32 scd_ssn = iwl4965_get_scd_ssn(tx_resp);
2976                 struct iwl4965_ht_agg *agg = NULL;
2977
2978                 if (!qc)
2979                         return;
2980
2981                 agg = &priv->stations[sta_id].tid[tid].agg;
2982
2983                 iwl4965_tx_status_reply_tx(priv, agg,
2984                                 (struct iwl4965_tx_resp_agg *)tx_resp, index);
2985
2986                 if ((tx_resp->frame_count == 1) &&
2987                     !iwl4965_is_tx_success(status)) {
2988                         /* TODO: send BAR */
2989                 }
2990
2991                 if (txq->q.read_ptr != (scd_ssn & 0xff)) {
2992                         int freed;
2993                         index = iwl_queue_dec_wrap(scd_ssn & 0xff, txq->q.n_bd);
2994                         IWL_DEBUG_TX_REPLY("Retry scheduler reclaim scd_ssn "
2995                                            "%d index %d\n", scd_ssn , index);
2996                         freed = iwl4965_tx_queue_reclaim(priv, txq_id, index);
2997                         priv->stations[sta_id].tid[tid].tfds_in_queue -= freed;
2998
2999                         if (iwl4965_queue_space(&txq->q) > txq->q.low_mark &&
3000                             txq_id >= 0 && priv->mac80211_registered &&
3001                             agg->state != IWL_EMPTYING_HW_QUEUE_DELBA)
3002                                 ieee80211_wake_queue(priv->hw, txq_id);
3003
3004                         iwl4965_check_empty_hw_queue(priv, sta_id, tid, txq_id);
3005                 }
3006         } else {
3007 #endif /* CONFIG_IWL4965_HT */
3008         tx_status = &(txq->txb[txq->q.read_ptr].status);
3009
3010         tx_status->retry_count = tx_resp->failure_frame;
3011         tx_status->queue_number = status;
3012         tx_status->queue_length = tx_resp->bt_kill_count;
3013         tx_status->queue_length |= tx_resp->failure_rts;
3014         tx_status->flags =
3015             iwl4965_is_tx_success(status) ? IEEE80211_TX_STATUS_ACK : 0;
3016         iwl4965_hwrate_to_tx_control(priv, le32_to_cpu(tx_resp->rate_n_flags),
3017                                      &tx_status->control);
3018
3019         IWL_DEBUG_TX("Tx queue %d Status %s (0x%08x) rate_n_flags 0x%x "
3020                      "retries %d\n", txq_id, iwl4965_get_tx_fail_reason(status),
3021                      status, le32_to_cpu(tx_resp->rate_n_flags),
3022                      tx_resp->failure_frame);
3023
3024         IWL_DEBUG_TX_REPLY("Tx queue reclaim %d\n", index);
3025         if (index != -1) {
3026                 int freed = iwl4965_tx_queue_reclaim(priv, txq_id, index);
3027 #ifdef CONFIG_IWL4965_HT
3028                 if (tid != MAX_TID_COUNT)
3029                         priv->stations[sta_id].tid[tid].tfds_in_queue -= freed;
3030                 if (iwl4965_queue_space(&txq->q) > txq->q.low_mark &&
3031                         (txq_id >= 0) &&
3032                         priv->mac80211_registered)
3033                         ieee80211_wake_queue(priv->hw, txq_id);
3034                 if (tid != MAX_TID_COUNT)
3035                         iwl4965_check_empty_hw_queue(priv, sta_id, tid, txq_id);
3036 #endif
3037         }
3038 #ifdef CONFIG_IWL4965_HT
3039         }
3040 #endif /* CONFIG_IWL4965_HT */
3041
3042         if (iwl_check_bits(status, TX_ABORT_REQUIRED_MSK))
3043                 IWL_ERROR("TODO:  Implement Tx ABORT REQUIRED!!!\n");
3044 }
3045
3046
3047 static void iwl4965_rx_reply_alive(struct iwl_priv *priv,
3048                                struct iwl4965_rx_mem_buffer *rxb)
3049 {
3050         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3051         struct iwl4965_alive_resp *palive;
3052         struct delayed_work *pwork;
3053
3054         palive = &pkt->u.alive_frame;
3055
3056         IWL_DEBUG_INFO("Alive ucode status 0x%08X revision "
3057                        "0x%01X 0x%01X\n",
3058                        palive->is_valid, palive->ver_type,
3059                        palive->ver_subtype);
3060
3061         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
3062                 IWL_DEBUG_INFO("Initialization Alive received.\n");
3063                 memcpy(&priv->card_alive_init,
3064                        &pkt->u.alive_frame,
3065                        sizeof(struct iwl4965_init_alive_resp));
3066                 pwork = &priv->init_alive_start;
3067         } else {
3068                 IWL_DEBUG_INFO("Runtime Alive received.\n");
3069                 memcpy(&priv->card_alive, &pkt->u.alive_frame,
3070                        sizeof(struct iwl4965_alive_resp));
3071                 pwork = &priv->alive_start;
3072         }
3073
3074         /* We delay the ALIVE response by 5ms to
3075          * give the HW RF Kill time to activate... */
3076         if (palive->is_valid == UCODE_VALID_OK)
3077                 queue_delayed_work(priv->workqueue, pwork,
3078                                    msecs_to_jiffies(5));
3079         else
3080                 IWL_WARNING("uCode did not respond OK.\n");
3081 }
3082
3083 static void iwl4965_rx_reply_add_sta(struct iwl_priv *priv,
3084                                  struct iwl4965_rx_mem_buffer *rxb)
3085 {
3086         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3087
3088         IWL_DEBUG_RX("Received REPLY_ADD_STA: 0x%02X\n", pkt->u.status);
3089         return;
3090 }
3091
3092 static void iwl4965_rx_reply_error(struct iwl_priv *priv,
3093                                struct iwl4965_rx_mem_buffer *rxb)
3094 {
3095         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3096
3097         IWL_ERROR("Error Reply type 0x%08X cmd %s (0x%02X) "
3098                 "seq 0x%04X ser 0x%08X\n",
3099                 le32_to_cpu(pkt->u.err_resp.error_type),
3100                 get_cmd_string(pkt->u.err_resp.cmd_id),
3101                 pkt->u.err_resp.cmd_id,
3102                 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
3103                 le32_to_cpu(pkt->u.err_resp.error_info));
3104 }
3105
3106 #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
3107
3108 static void iwl4965_rx_csa(struct iwl_priv *priv, struct iwl4965_rx_mem_buffer *rxb)
3109 {
3110         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3111         struct iwl4965_rxon_cmd *rxon = (void *)&priv->active_rxon;
3112         struct iwl4965_csa_notification *csa = &(pkt->u.csa_notif);
3113         IWL_DEBUG_11H("CSA notif: channel %d, status %d\n",
3114                       le16_to_cpu(csa->channel), le32_to_cpu(csa->status));
3115         rxon->channel = csa->channel;
3116         priv->staging_rxon.channel = csa->channel;
3117 }
3118
3119 static void iwl4965_rx_spectrum_measure_notif(struct iwl_priv *priv,
3120                                           struct iwl4965_rx_mem_buffer *rxb)
3121 {
3122 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
3123         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3124         struct iwl4965_spectrum_notification *report = &(pkt->u.spectrum_notif);
3125
3126         if (!report->state) {
3127                 IWL_DEBUG(IWL_DL_11H | IWL_DL_INFO,
3128                           "Spectrum Measure Notification: Start\n");
3129                 return;
3130         }
3131
3132         memcpy(&priv->measure_report, report, sizeof(*report));
3133         priv->measurement_status |= MEASUREMENT_READY;
3134 #endif
3135 }
3136
3137 static void iwl4965_rx_pm_sleep_notif(struct iwl_priv *priv,
3138                                   struct iwl4965_rx_mem_buffer *rxb)
3139 {
3140 #ifdef CONFIG_IWLWIFI_DEBUG
3141         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3142         struct iwl4965_sleep_notification *sleep = &(pkt->u.sleep_notif);
3143         IWL_DEBUG_RX("sleep mode: %d, src: %d\n",
3144                      sleep->pm_sleep_mode, sleep->pm_wakeup_src);
3145 #endif
3146 }
3147
3148 static void iwl4965_rx_pm_debug_statistics_notif(struct iwl_priv *priv,
3149                                              struct iwl4965_rx_mem_buffer *rxb)
3150 {
3151         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3152         IWL_DEBUG_RADIO("Dumping %d bytes of unhandled "
3153                         "notification for %s:\n",
3154                         le32_to_cpu(pkt->len), get_cmd_string(pkt->hdr.cmd));
3155         iwl_print_hex_dump(IWL_DL_RADIO, pkt->u.raw, le32_to_cpu(pkt->len));
3156 }
3157
3158 static void iwl4965_bg_beacon_update(struct work_struct *work)
3159 {
3160         struct iwl_priv *priv =
3161                 container_of(work, struct iwl_priv, beacon_update);
3162         struct sk_buff *beacon;
3163
3164         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
3165         beacon = ieee80211_beacon_get(priv->hw, priv->vif, NULL);
3166
3167         if (!beacon) {
3168                 IWL_ERROR("update beacon failed\n");
3169                 return;
3170         }
3171
3172         mutex_lock(&priv->mutex);
3173         /* new beacon skb is allocated every time; dispose previous.*/
3174         if (priv->ibss_beacon)
3175                 dev_kfree_skb(priv->ibss_beacon);
3176
3177         priv->ibss_beacon = beacon;
3178         mutex_unlock(&priv->mutex);
3179
3180         iwl4965_send_beacon_cmd(priv);
3181 }
3182
3183 static void iwl4965_rx_beacon_notif(struct iwl_priv *priv,
3184                                 struct iwl4965_rx_mem_buffer *rxb)
3185 {
3186 #ifdef CONFIG_IWLWIFI_DEBUG
3187         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3188         struct iwl4965_beacon_notif *beacon = &(pkt->u.beacon_status);
3189         u8 rate = iwl4965_hw_get_rate(beacon->beacon_notify_hdr.rate_n_flags);
3190
3191         IWL_DEBUG_RX("beacon status %x retries %d iss %d "
3192                 "tsf %d %d rate %d\n",
3193                 le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
3194                 beacon->beacon_notify_hdr.failure_frame,
3195                 le32_to_cpu(beacon->ibss_mgr_status),
3196                 le32_to_cpu(beacon->high_tsf),
3197                 le32_to_cpu(beacon->low_tsf), rate);
3198 #endif
3199
3200         if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
3201             (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
3202                 queue_work(priv->workqueue, &priv->beacon_update);
3203 }
3204
3205 /* Service response to REPLY_SCAN_CMD (0x80) */
3206 static void iwl4965_rx_reply_scan(struct iwl_priv *priv,
3207                               struct iwl4965_rx_mem_buffer *rxb)
3208 {
3209 #ifdef CONFIG_IWLWIFI_DEBUG
3210         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3211         struct iwl4965_scanreq_notification *notif =
3212             (struct iwl4965_scanreq_notification *)pkt->u.raw;
3213
3214         IWL_DEBUG_RX("Scan request status = 0x%x\n", notif->status);
3215 #endif
3216 }
3217
3218 /* Service SCAN_START_NOTIFICATION (0x82) */
3219 static void iwl4965_rx_scan_start_notif(struct iwl_priv *priv,
3220                                     struct iwl4965_rx_mem_buffer *rxb)
3221 {
3222         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3223         struct iwl4965_scanstart_notification *notif =
3224             (struct iwl4965_scanstart_notification *)pkt->u.raw;
3225         priv->scan_start_tsf = le32_to_cpu(notif->tsf_low);
3226         IWL_DEBUG_SCAN("Scan start: "
3227                        "%d [802.11%s] "
3228                        "(TSF: 0x%08X:%08X) - %d (beacon timer %u)\n",
3229                        notif->channel,
3230                        notif->band ? "bg" : "a",
3231                        notif->tsf_high,
3232                        notif->tsf_low, notif->status, notif->beacon_timer);
3233 }
3234
3235 /* Service SCAN_RESULTS_NOTIFICATION (0x83) */
3236 static void iwl4965_rx_scan_results_notif(struct iwl_priv *priv,
3237                                       struct iwl4965_rx_mem_buffer *rxb)
3238 {
3239         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3240         struct iwl4965_scanresults_notification *notif =
3241             (struct iwl4965_scanresults_notification *)pkt->u.raw;
3242
3243         IWL_DEBUG_SCAN("Scan ch.res: "
3244                        "%d [802.11%s] "
3245                        "(TSF: 0x%08X:%08X) - %d "
3246                        "elapsed=%lu usec (%dms since last)\n",
3247                        notif->channel,
3248                        notif->band ? "bg" : "a",
3249                        le32_to_cpu(notif->tsf_high),
3250                        le32_to_cpu(notif->tsf_low),
3251                        le32_to_cpu(notif->statistics[0]),
3252                        le32_to_cpu(notif->tsf_low) - priv->scan_start_tsf,
3253                        jiffies_to_msecs(elapsed_jiffies
3254                                         (priv->last_scan_jiffies, jiffies)));
3255
3256         priv->last_scan_jiffies = jiffies;
3257         priv->next_scan_jiffies = 0;
3258 }
3259
3260 /* Service SCAN_COMPLETE_NOTIFICATION (0x84) */
3261 static void iwl4965_rx_scan_complete_notif(struct iwl_priv *priv,
3262                                        struct iwl4965_rx_mem_buffer *rxb)
3263 {
3264         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3265         struct iwl4965_scancomplete_notification *scan_notif = (void *)pkt->u.raw;
3266
3267         IWL_DEBUG_SCAN("Scan complete: %d channels (TSF 0x%08X:%08X) - %d\n",
3268                        scan_notif->scanned_channels,
3269                        scan_notif->tsf_low,
3270                        scan_notif->tsf_high, scan_notif->status);
3271
3272         /* The HW is no longer scanning */
3273         clear_bit(STATUS_SCAN_HW, &priv->status);
3274
3275         /* The scan completion notification came in, so kill that timer... */
3276         cancel_delayed_work(&priv->scan_check);
3277
3278         IWL_DEBUG_INFO("Scan pass on %sGHz took %dms\n",
3279                        (priv->scan_bands == 2) ? "2.4" : "5.2",
3280                        jiffies_to_msecs(elapsed_jiffies
3281                                         (priv->scan_pass_start, jiffies)));
3282
3283         /* Remove this scanned band from the list
3284          * of pending bands to scan */
3285         priv->scan_bands--;
3286
3287         /* If a request to abort was given, or the scan did not succeed
3288          * then we reset the scan state machine and terminate,
3289          * re-queuing another scan if one has been requested */
3290         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
3291                 IWL_DEBUG_INFO("Aborted scan completed.\n");
3292                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
3293         } else {
3294                 /* If there are more bands on this scan pass reschedule */
3295                 if (priv->scan_bands > 0)
3296                         goto reschedule;
3297         }
3298
3299         priv->last_scan_jiffies = jiffies;
3300         priv->next_scan_jiffies = 0;
3301         IWL_DEBUG_INFO("Setting scan to off\n");
3302
3303         clear_bit(STATUS_SCANNING, &priv->status);
3304
3305         IWL_DEBUG_INFO("Scan took %dms\n",
3306                 jiffies_to_msecs(elapsed_jiffies(priv->scan_start, jiffies)));
3307
3308         queue_work(priv->workqueue, &priv->scan_completed);
3309
3310         return;
3311
3312 reschedule:
3313         priv->scan_pass_start = jiffies;
3314         queue_work(priv->workqueue, &priv->request_scan);
3315 }
3316
3317 /* Handle notification from uCode that card's power state is changing
3318  * due to software, hardware, or critical temperature RFKILL */
3319 static void iwl4965_rx_card_state_notif(struct iwl_priv *priv,
3320                                     struct iwl4965_rx_mem_buffer *rxb)
3321 {
3322         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3323         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
3324         unsigned long status = priv->status;
3325
3326         IWL_DEBUG_RF_KILL("Card state received: HW:%s SW:%s\n",
3327                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
3328                           (flags & SW_CARD_DISABLED) ? "Kill" : "On");
3329
3330         if (flags & (SW_CARD_DISABLED | HW_CARD_DISABLED |
3331                      RF_CARD_DISABLED)) {
3332
3333                 iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
3334                             CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
3335
3336                 if (!iwl_grab_nic_access(priv)) {
3337                         iwl_write_direct32(
3338                                 priv, HBUS_TARG_MBX_C,
3339                                 HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
3340
3341                         iwl_release_nic_access(priv);
3342                 }
3343
3344                 if (!(flags & RXON_CARD_DISABLED)) {
3345                         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
3346                                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
3347                         if (!iwl_grab_nic_access(priv)) {
3348                                 iwl_write_direct32(
3349                                         priv, HBUS_TARG_MBX_C,
3350                                         HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
3351
3352                                 iwl_release_nic_access(priv);
3353                         }
3354                 }
3355
3356                 if (flags & RF_CARD_DISABLED) {
3357                         iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
3358                                     CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
3359                         iwl_read32(priv, CSR_UCODE_DRV_GP1);
3360                         if (!iwl_grab_nic_access(priv))
3361                                 iwl_release_nic_access(priv);
3362                 }
3363         }
3364
3365         if (flags & HW_CARD_DISABLED)
3366                 set_bit(STATUS_RF_KILL_HW, &priv->status);
3367         else
3368                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
3369
3370
3371         if (flags & SW_CARD_DISABLED)
3372                 set_bit(STATUS_RF_KILL_SW, &priv->status);
3373         else
3374                 clear_bit(STATUS_RF_KILL_SW, &priv->status);
3375
3376         if (!(flags & RXON_CARD_DISABLED))
3377                 iwl4965_scan_cancel(priv);
3378
3379         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
3380              test_bit(STATUS_RF_KILL_HW, &priv->status)) ||
3381             (test_bit(STATUS_RF_KILL_SW, &status) !=
3382              test_bit(STATUS_RF_KILL_SW, &priv->status)))
3383                 queue_work(priv->workqueue, &priv->rf_kill);
3384         else
3385                 wake_up_interruptible(&priv->wait_command_queue);
3386 }
3387
3388 /**
3389  * iwl4965_setup_rx_handlers - Initialize Rx handler callbacks
3390  *
3391  * Setup the RX handlers for each of the reply types sent from the uCode
3392  * to the host.
3393  *
3394  * This function chains into the hardware specific files for them to setup
3395  * any hardware specific handlers as well.
3396  */
3397 static void iwl4965_setup_rx_handlers(struct iwl_priv *priv)
3398 {
3399         priv->rx_handlers[REPLY_ALIVE] = iwl4965_rx_reply_alive;
3400         priv->rx_handlers[REPLY_ADD_STA] = iwl4965_rx_reply_add_sta;
3401         priv->rx_handlers[REPLY_ERROR] = iwl4965_rx_reply_error;
3402         priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl4965_rx_csa;
3403         priv->rx_handlers[SPECTRUM_MEASURE_NOTIFICATION] =
3404             iwl4965_rx_spectrum_measure_notif;
3405         priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl4965_rx_pm_sleep_notif;
3406         priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
3407             iwl4965_rx_pm_debug_statistics_notif;
3408         priv->rx_handlers[BEACON_NOTIFICATION] = iwl4965_rx_beacon_notif;
3409
3410         /*
3411          * The same handler is used for both the REPLY to a discrete
3412          * statistics request from the host as well as for the periodic
3413          * statistics notifications (after received beacons) from the uCode.
3414          */
3415         priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl4965_hw_rx_statistics;
3416         priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl4965_hw_rx_statistics;
3417
3418         priv->rx_handlers[REPLY_SCAN_CMD] = iwl4965_rx_reply_scan;
3419         priv->rx_handlers[SCAN_START_NOTIFICATION] = iwl4965_rx_scan_start_notif;
3420         priv->rx_handlers[SCAN_RESULTS_NOTIFICATION] =
3421             iwl4965_rx_scan_results_notif;
3422         priv->rx_handlers[SCAN_COMPLETE_NOTIFICATION] =
3423             iwl4965_rx_scan_complete_notif;
3424         priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl4965_rx_card_state_notif;
3425         priv->rx_handlers[REPLY_TX] = iwl4965_rx_reply_tx;
3426
3427         /* Set up hardware specific Rx handlers */
3428         iwl4965_hw_rx_handler_setup(priv);
3429 }
3430
3431 /**
3432  * iwl4965_tx_cmd_complete - Pull unused buffers off the queue and reclaim them
3433  * @rxb: Rx buffer to reclaim
3434  *
3435  * If an Rx buffer has an async callback associated with it the callback
3436  * will be executed.  The attached skb (if present) will only be freed
3437  * if the callback returns 1
3438  */
3439 static void iwl4965_tx_cmd_complete(struct iwl_priv *priv,
3440                                 struct iwl4965_rx_mem_buffer *rxb)
3441 {
3442         struct iwl4965_rx_packet *pkt = (struct iwl4965_rx_packet *)rxb->skb->data;
3443         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
3444         int txq_id = SEQ_TO_QUEUE(sequence);
3445         int index = SEQ_TO_INDEX(sequence);
3446         int huge = sequence & SEQ_HUGE_FRAME;
3447         int cmd_index;
3448         struct iwl_cmd *cmd;
3449
3450         /* If a Tx command is being handled and it isn't in the actual
3451          * command queue then there a command routing bug has been introduced
3452          * in the queue management code. */
3453         if (txq_id != IWL_CMD_QUEUE_NUM)
3454                 IWL_ERROR("Error wrong command queue %d command id 0x%X\n",
3455                           txq_id, pkt->hdr.cmd);
3456         BUG_ON(txq_id != IWL_CMD_QUEUE_NUM);
3457
3458         cmd_index = get_cmd_index(&priv->txq[IWL_CMD_QUEUE_NUM].q, index, huge);
3459         cmd = &priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_index];
3460
3461         /* Input error checking is done when commands are added to queue. */
3462         if (cmd->meta.flags & CMD_WANT_SKB) {
3463                 cmd->meta.source->u.skb = rxb->skb;
3464                 rxb->skb = NULL;
3465         } else if (cmd->meta.u.callback &&
3466                    !cmd->meta.u.callback(priv, cmd, rxb->skb))
3467                 rxb->skb = NULL;
3468
3469         iwl4965_tx_queue_reclaim(priv, txq_id, index);
3470
3471         if (!(cmd->meta.flags & CMD_ASYNC)) {
3472                 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
3473                 wake_up_interruptible(&priv->wait_command_queue);
3474         }
3475 }
3476
3477 /************************** RX-FUNCTIONS ****************************/
3478 /*
3479  * Rx theory of operation
3480  *
3481  * Driver allocates a circular buffer of Receive Buffer Descriptors (RBDs),
3482  * each of which point to Receive Buffers to be filled by 4965.  These get
3483  * used not only for Rx frames, but for any command response or notification
3484  * from the 4965.  The driver and 4965 manage the Rx buffers by means
3485  * of indexes into the circular buffer.
3486  *
3487  * Rx Queue Indexes
3488  * The host/firmware share two index registers for managing the Rx buffers.
3489  *
3490  * The READ index maps to the first position that the firmware may be writing
3491  * to -- the driver can read up to (but not including) this position and get
3492  * good data.
3493  * The READ index is managed by the firmware once the card is enabled.
3494  *
3495  * The WRITE index maps to the last position the driver has read from -- the
3496  * position preceding WRITE is the last slot the firmware can place a packet.
3497  *
3498  * The queue is empty (no good data) if WRITE = READ - 1, and is full if
3499  * WRITE = READ.
3500  *
3501  * During initialization, the host sets up the READ queue position to the first
3502  * INDEX position, and WRITE to the last (READ - 1 wrapped)
3503  *
3504  * When the firmware places a packet in a buffer, it will advance the READ index
3505  * and fire the RX interrupt.  The driver can then query the READ index and
3506  * process as many packets as possible, moving the WRITE index forward as it
3507  * resets the Rx queue buffers with new memory.
3508  *
3509  * The management in the driver is as follows:
3510  * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free.  When
3511  *   iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
3512  *   to replenish the iwl->rxq->rx_free.
3513  * + In iwl4965_rx_replenish (scheduled) if 'processed' != 'read' then the
3514  *   iwl->rxq is replenished and the READ INDEX is updated (updating the
3515  *   'processed' and 'read' driver indexes as well)
3516  * + A received packet is processed and handed to the kernel network stack,
3517  *   detached from the iwl->rxq.  The driver 'processed' index is updated.
3518  * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
3519  *   list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
3520  *   INDEX is not incremented and iwl->status(RX_STALLED) is set.  If there
3521  *   were enough free buffers and RX_STALLED is set it is cleared.
3522  *
3523  *
3524  * Driver sequence:
3525  *
3526  * iwl4965_rx_queue_alloc()   Allocates rx_free
3527  * iwl4965_rx_replenish()     Replenishes rx_free list from rx_used, and calls
3528  *                            iwl4965_rx_queue_restock
3529  * iwl4965_rx_queue_restock() Moves available buffers from rx_free into Rx
3530  *                            queue, updates firmware pointers, and updates
3531  *                            the WRITE index.  If insufficient rx_free buffers
3532  *                            are available, schedules iwl4965_rx_replenish
3533  *
3534  * -- enable interrupts --
3535  * ISR - iwl4965_rx()         Detach iwl4965_rx_mem_buffers from pool up to the
3536  *                            READ INDEX, detaching the SKB from the pool.
3537  *                            Moves the packet buffer from queue to rx_used.
3538  *                            Calls iwl4965_rx_queue_restock to refill any empty
3539  *                            slots.
3540  * ...
3541  *
3542  */
3543
3544 /**
3545  * iwl4965_rx_queue_space - Return number of free slots available in queue.
3546  */
3547 static int iwl4965_rx_queue_space(const struct iwl4965_rx_queue *q)
3548 {
3549         int s = q->read - q->write;
3550         if (s <= 0)
3551                 s += RX_QUEUE_SIZE;
3552         /* keep some buffer to not confuse full and empty queue */
3553         s -= 2;
3554         if (s < 0)
3555                 s = 0;
3556         return s;
3557 }
3558
3559 /**
3560  * iwl4965_rx_queue_update_write_ptr - Update the write pointer for the RX queue
3561  */
3562 int iwl4965_rx_queue_update_write_ptr(struct iwl_priv *priv, struct iwl4965_rx_queue *q)
3563 {
3564         u32 reg = 0;
3565         int rc = 0;
3566         unsigned long flags;
3567
3568         spin_lock_irqsave(&q->lock, flags);
3569
3570         if (q->need_update == 0)
3571                 goto exit_unlock;
3572
3573         /* If power-saving is in use, make sure device is awake */
3574         if (test_bit(STATUS_POWER_PMI, &priv->status)) {
3575                 reg = iwl_read32(priv, CSR_UCODE_DRV_GP1);
3576
3577                 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
3578                         iwl_set_bit(priv, CSR_GP_CNTRL,
3579                                     CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
3580                         goto exit_unlock;
3581                 }
3582
3583                 rc = iwl_grab_nic_access(priv);
3584                 if (rc)
3585                         goto exit_unlock;
3586
3587                 /* Device expects a multiple of 8 */
3588                 iwl_write_direct32(priv, FH_RSCSR_CHNL0_WPTR,
3589                                      q->write & ~0x7);
3590                 iwl_release_nic_access(priv);
3591
3592         /* Else device is assumed to be awake */
3593         } else
3594                 /* Device expects a multiple of 8 */
3595                 iwl_write32(priv, FH_RSCSR_CHNL0_WPTR, q->write & ~0x7);
3596
3597
3598         q->need_update = 0;
3599
3600  exit_unlock:
3601         spin_unlock_irqrestore(&q->lock, flags);
3602         return rc;
3603 }
3604
3605 /**
3606  * iwl4965_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr
3607  */
3608 static inline __le32 iwl4965_dma_addr2rbd_ptr(struct iwl_priv *priv,
3609                                           dma_addr_t dma_addr)
3610 {
3611         return cpu_to_le32((u32)(dma_addr >> 8));
3612 }
3613
3614
3615 /**
3616  * iwl4965_rx_queue_restock - refill RX queue from pre-allocated pool
3617  *
3618  * If there are slots in the RX queue that need to be restocked,
3619  * and we have free pre-allocated buffers, fill the ranks as much
3620  * as we can, pulling from rx_free.
3621  *
3622  * This moves the 'write' index forward to catch up with 'processed', and
3623  * also updates the memory address in the firmware to reference the new
3624  * target buffer.
3625  */
3626 static int iwl4965_rx_queue_restock(struct iwl_priv *priv)
3627 {
3628         struct iwl4965_rx_queue *rxq = &priv->rxq;
3629         struct list_head *element;
3630         struct iwl4965_rx_mem_buffer *rxb;
3631         unsigned long flags;
3632         int write, rc;
3633
3634         spin_lock_irqsave(&rxq->lock, flags);
3635         write = rxq->write & ~0x7;
3636         while ((iwl4965_rx_queue_space(rxq) > 0) && (rxq->free_count)) {
3637                 /* Get next free Rx buffer, remove from free list */
3638                 element = rxq->rx_free.next;
3639                 rxb = list_entry(element, struct iwl4965_rx_mem_buffer, list);
3640                 list_del(element);
3641
3642                 /* Point to Rx buffer via next RBD in circular buffer */
3643                 rxq->bd[rxq->write] = iwl4965_dma_addr2rbd_ptr(priv, rxb->dma_addr);
3644                 rxq->queue[rxq->write] = rxb;
3645                 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
3646                 rxq->free_count--;
3647         }
3648         spin_unlock_irqrestore(&rxq->lock, flags);
3649         /* If the pre-allocated buffer pool is dropping low, schedule to
3650          * refill it */
3651         if (rxq->free_count <= RX_LOW_WATERMARK)
3652                 queue_work(priv->workqueue, &priv->rx_replenish);
3653
3654
3655         /* If we've added more space for the firmware to place data, tell it.
3656          * Increment device's write pointer in multiples of 8. */
3657         if ((write != (rxq->write & ~0x7))
3658             || (abs(rxq->write - rxq->read) > 7)) {
3659                 spin_lock_irqsave(&rxq->lock, flags);
3660                 rxq->need_update = 1;
3661                 spin_unlock_irqrestore(&rxq->lock, flags);
3662                 rc = iwl4965_rx_queue_update_write_ptr(priv, rxq);
3663                 if (rc)
3664                         return rc;
3665         }
3666
3667         return 0;
3668 }
3669
3670 /**
3671  * iwl4965_rx_replenish - Move all used packet from rx_used to rx_free
3672  *
3673  * When moving to rx_free an SKB is allocated for the slot.
3674  *
3675  * Also restock the Rx queue via iwl4965_rx_queue_restock.
3676  * This is called as a scheduled work item (except for during initialization)
3677  */
3678 static void iwl4965_rx_allocate(struct iwl_priv *priv)
3679 {
3680         struct iwl4965_rx_queue *rxq = &priv->rxq;
3681         struct list_head *element;
3682         struct iwl4965_rx_mem_buffer *rxb;
3683         unsigned long flags;
3684         spin_lock_irqsave(&rxq->lock, flags);
3685         while (!list_empty(&rxq->rx_used)) {
3686                 element = rxq->rx_used.next;
3687                 rxb = list_entry(element, struct iwl4965_rx_mem_buffer, list);
3688
3689                 /* Alloc a new receive buffer */
3690                 rxb->skb =
3691                     alloc_skb(priv->hw_params.rx_buf_size,
3692                                 __GFP_NOWARN | GFP_ATOMIC);
3693                 if (!rxb->skb) {
3694                         if (net_ratelimit())
3695                                 printk(KERN_CRIT DRV_NAME
3696                                        ": Can not allocate SKB buffers\n");
3697                         /* We don't reschedule replenish work here -- we will
3698                          * call the restock method and if it still needs
3699                          * more buffers it will schedule replenish */
3700                         break;
3701                 }
3702                 priv->alloc_rxb_skb++;
3703                 list_del(element);
3704
3705                 /* Get physical address of RB/SKB */
3706                 rxb->dma_addr =
3707                     pci_map_single(priv->pci_dev, rxb->skb->data,
3708                            priv->hw_params.rx_buf_size, PCI_DMA_FROMDEVICE);
3709                 list_add_tail(&rxb->list, &rxq->rx_free);
3710                 rxq->free_count++;
3711         }
3712         spin_unlock_irqrestore(&rxq->lock, flags);
3713 }
3714
3715 /*
3716  * this should be called while priv->lock is locked
3717 */
3718 static void __iwl4965_rx_replenish(void *data)
3719 {
3720         struct iwl_priv *priv = data;
3721
3722         iwl4965_rx_allocate(priv);
3723         iwl4965_rx_queue_restock(priv);
3724 }
3725
3726
3727 void iwl4965_rx_replenish(void *data)
3728 {
3729         struct iwl_priv *priv = data;
3730         unsigned long flags;
3731
3732         iwl4965_rx_allocate(priv);
3733
3734         spin_lock_irqsave(&priv->lock, flags);
3735         iwl4965_rx_queue_restock(priv);
3736         spin_unlock_irqrestore(&priv->lock, flags);
3737 }
3738
3739 /* Assumes that the skb field of the buffers in 'pool' is kept accurate.
3740  * If an SKB has been detached, the POOL needs to have its SKB set to NULL
3741  * This free routine walks the list of POOL entries and if SKB is set to
3742  * non NULL it is unmapped and freed
3743  */
3744 static void iwl4965_rx_queue_free(struct iwl_priv *priv, struct iwl4965_rx_queue *rxq)
3745 {
3746         int i;
3747         for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
3748                 if (rxq->pool[i].skb != NULL) {
3749                         pci_unmap_single(priv->pci_dev,
3750                                          rxq->pool[i].dma_addr,
3751                                          priv->hw_params.rx_buf_size,
3752                                          PCI_DMA_FROMDEVICE);
3753                         dev_kfree_skb(rxq->pool[i].skb);
3754                 }
3755         }
3756
3757         pci_free_consistent(priv->pci_dev, 4 * RX_QUEUE_SIZE, rxq->bd,
3758                             rxq->dma_addr);
3759         rxq->bd = NULL;
3760 }
3761
3762 int iwl4965_rx_queue_alloc(struct iwl_priv *priv)
3763 {
3764         struct iwl4965_rx_queue *rxq = &priv->rxq;
3765         struct pci_dev *dev = priv->pci_dev;
3766         int i;
3767
3768         spin_lock_init(&rxq->lock);
3769         INIT_LIST_HEAD(&rxq->rx_free);
3770         INIT_LIST_HEAD(&rxq->rx_used);
3771
3772         /* Alloc the circular buffer of Read Buffer Descriptors (RBDs) */
3773         rxq->bd = pci_alloc_consistent(dev, 4 * RX_QUEUE_SIZE, &rxq->dma_addr);
3774         if (!rxq->bd)
3775                 return -ENOMEM;
3776
3777         /* Fill the rx_used queue with _all_ of the Rx buffers */
3778         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++)
3779                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
3780
3781         /* Set us so that we have processed and used all buffers, but have
3782          * not restocked the Rx queue with fresh buffers */
3783         rxq->read = rxq->write = 0;
3784         rxq->free_count = 0;
3785         rxq->need_update = 0;
3786         return 0;
3787 }
3788
3789 void iwl4965_rx_queue_reset(struct iwl_priv *priv, struct iwl4965_rx_queue *rxq)
3790 {
3791         unsigned long flags;
3792         int i;
3793         spin_lock_irqsave(&rxq->lock, flags);
3794         INIT_LIST_HEAD(&rxq->rx_free);
3795         INIT_LIST_HEAD(&rxq->rx_used);
3796         /* Fill the rx_used queue with _all_ of the Rx buffers */
3797         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
3798                 /* In the reset function, these buffers may have been allocated
3799                  * to an SKB, so we need to unmap and free potential storage */
3800                 if (rxq->pool[i].skb != NULL) {
3801                         pci_unmap_single(priv->pci_dev,
3802                                          rxq->pool[i].dma_addr,
3803                                          priv->hw_params.rx_buf_size,
3804                                          PCI_DMA_FROMDEVICE);
3805                         priv->alloc_rxb_skb--;
3806                         dev_kfree_skb(rxq->pool[i].skb);
3807                         rxq->pool[i].skb = NULL;
3808                 }
3809                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
3810         }
3811
3812         /* Set us so that we have processed and used all buffers, but have
3813          * not restocked the Rx queue with fresh buffers */
3814         rxq->read = rxq->write = 0;
3815         rxq->free_count = 0;
3816         spin_unlock_irqrestore(&rxq->lock, flags);
3817 }
3818
3819 /* Convert linear signal-to-noise ratio into dB */
3820 static u8 ratio2dB[100] = {
3821 /*       0   1   2   3   4   5   6   7   8   9 */
3822          0,  0,  6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
3823         20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
3824         26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
3825         29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
3826         32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
3827         34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
3828         36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
3829         37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
3830         38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
3831         39, 39, 39, 39, 39, 40, 40, 40, 40, 40  /* 90 - 99 */
3832 };
3833
3834 /* Calculates a relative dB value from a ratio of linear
3835  *   (i.e. not dB) signal levels.
3836  * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
3837 int iwl4965_calc_db_from_ratio(int sig_ratio)
3838 {
3839         /* 1000:1 or higher just report as 60 dB */
3840         if (sig_ratio >= 1000)
3841                 return 60;
3842
3843         /* 100:1 or higher, divide by 10 and use table,
3844          *   add 20 dB to make up for divide by 10 */
3845         if (sig_ratio >= 100)
3846                 return (20 + (int)ratio2dB[sig_ratio/10]);
3847
3848         /* We shouldn't see this */
3849         if (sig_ratio < 1)
3850                 return 0;
3851
3852         /* Use table for ratios 1:1 - 99:1 */
3853         return (int)ratio2dB[sig_ratio];
3854 }
3855
3856 #define PERFECT_RSSI (-20) /* dBm */
3857 #define WORST_RSSI (-95)   /* dBm */
3858 #define RSSI_RANGE (PERFECT_RSSI - WORST_RSSI)
3859
3860 /* Calculate an indication of rx signal quality (a percentage, not dBm!).
3861  * See http://www.ces.clemson.edu/linux/signal_quality.shtml for info
3862  *   about formulas used below. */
3863 int iwl4965_calc_sig_qual(int rssi_dbm, int noise_dbm)
3864 {
3865         int sig_qual;
3866         int degradation = PERFECT_RSSI - rssi_dbm;
3867
3868         /* If we get a noise measurement, use signal-to-noise ratio (SNR)
3869          * as indicator; formula is (signal dbm - noise dbm).
3870          * SNR at or above 40 is a great signal (100%).
3871          * Below that, scale to fit SNR of 0 - 40 dB within 0 - 100% indicator.
3872          * Weakest usable signal is usually 10 - 15 dB SNR. */
3873         if (noise_dbm) {
3874                 if (rssi_dbm - noise_dbm >= 40)
3875                         return 100;
3876                 else if (rssi_dbm < noise_dbm)
3877                         return 0;
3878                 sig_qual = ((rssi_dbm - noise_dbm) * 5) / 2;
3879
3880         /* Else use just the signal level.
3881          * This formula is a least squares fit of data points collected and
3882          *   compared with a reference system that had a percentage (%) display
3883          *   for signal quality. */
3884         } else
3885                 sig_qual = (100 * (RSSI_RANGE * RSSI_RANGE) - degradation *
3886                             (15 * RSSI_RANGE + 62 * degradation)) /
3887                            (RSSI_RANGE * RSSI_RANGE);
3888
3889         if (sig_qual > 100)
3890                 sig_qual = 100;
3891         else if (sig_qual < 1)
3892                 sig_qual = 0;
3893
3894         return sig_qual;
3895 }
3896
3897 /**
3898  * iwl4965_rx_handle - Main entry function for receiving responses from uCode
3899  *
3900  * Uses the priv->rx_handlers callback function array to invoke
3901  * the appropriate handlers, including command responses,
3902  * frame-received notifications, and other notifications.
3903  */
3904 static void iwl4965_rx_handle(struct iwl_priv *priv)
3905 {
3906         struct iwl4965_rx_mem_buffer *rxb;
3907         struct iwl4965_rx_packet *pkt;
3908         struct iwl4965_rx_queue *rxq = &priv->rxq;
3909         u32 r, i;
3910         int reclaim;
3911         unsigned long flags;
3912         u8 fill_rx = 0;
3913         u32 count = 8;
3914
3915         /* uCode's read index (stored in shared DRAM) indicates the last Rx
3916          * buffer that the driver may process (last buffer filled by ucode). */
3917         r = iwl4965_hw_get_rx_read(priv);
3918         i = rxq->read;
3919
3920         /* Rx interrupt, but nothing sent from uCode */
3921         if (i == r)
3922                 IWL_DEBUG(IWL_DL_RX | IWL_DL_ISR, "r = %d, i = %d\n", r, i);
3923
3924         if (iwl4965_rx_queue_space(rxq) > (RX_QUEUE_SIZE / 2))
3925                 fill_rx = 1;
3926
3927         while (i != r) {
3928                 rxb = rxq->queue[i];
3929
3930                 /* If an RXB doesn't have a Rx queue slot associated with it,
3931                  * then a bug has been introduced in the queue refilling
3932                  * routines -- catch it here */
3933                 BUG_ON(rxb == NULL);
3934
3935                 rxq->queue[i] = NULL;
3936
3937                 pci_dma_sync_single_for_cpu(priv->pci_dev, rxb->dma_addr,
3938                                             priv->hw_params.rx_buf_size,
3939                                             PCI_DMA_FROMDEVICE);
3940                 pkt = (struct iwl4965_rx_packet *)rxb->skb->data;
3941
3942                 /* Reclaim a command buffer only if this packet is a response
3943                  *   to a (driver-originated) command.
3944                  * If the packet (e.g. Rx frame) originated from uCode,
3945                  *   there is no command buffer to reclaim.
3946                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
3947                  *   but apparently a few don't get set; catch them here. */
3948                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
3949                         (pkt->hdr.cmd != REPLY_RX_PHY_CMD) &&
3950                         (pkt->hdr.cmd != REPLY_RX) &&
3951                         (pkt->hdr.cmd != REPLY_COMPRESSED_BA) &&
3952                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
3953                         (pkt->hdr.cmd != REPLY_TX);
3954
3955                 /* Based on type of command response or notification,
3956                  *   handle those that need handling via function in
3957                  *   rx_handlers table.  See iwl4965_setup_rx_handlers() */
3958                 if (priv->rx_handlers[pkt->hdr.cmd]) {
3959                         IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
3960                                 "r = %d, i = %d, %s, 0x%02x\n", r, i,
3961                                 get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
3962                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
3963                 } else {
3964                         /* No handling needed */
3965                         IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
3966                                 "r %d i %d No handler needed for %s, 0x%02x\n",
3967                                 r, i, get_cmd_string(pkt->hdr.cmd),
3968                                 pkt->hdr.cmd);
3969                 }
3970
3971                 if (reclaim) {
3972                         /* Invoke any callbacks, transfer the skb to caller, and
3973                          * fire off the (possibly) blocking iwl_send_cmd()
3974                          * as we reclaim the driver command queue */
3975                         if (rxb && rxb->skb)
3976                                 iwl4965_tx_cmd_complete(priv, rxb);
3977                         else
3978                                 IWL_WARNING("Claim null rxb?\n");
3979                 }
3980
3981                 /* For now we just don't re-use anything.  We can tweak this
3982                  * later to try and re-use notification packets and SKBs that
3983                  * fail to Rx correctly */
3984                 if (rxb->skb != NULL) {
3985                         priv->alloc_rxb_skb--;
3986                         dev_kfree_skb_any(rxb->skb);
3987                         rxb->skb = NULL;
3988                 }
3989
3990                 pci_unmap_single(priv->pci_dev, rxb->dma_addr,
3991                                  priv->hw_params.rx_buf_size,
3992                                  PCI_DMA_FROMDEVICE);
3993                 spin_lock_irqsave(&rxq->lock, flags);
3994                 list_add_tail(&rxb->list, &priv->rxq.rx_used);
3995                 spin_unlock_irqrestore(&rxq->lock, flags);
3996                 i = (i + 1) & RX_QUEUE_MASK;
3997                 /* If there are a lot of unused frames,
3998                  * restock the Rx queue so ucode wont assert. */
3999                 if (fill_rx) {
4000                         count++;
4001                         if (count >= 8) {
4002                                 priv->rxq.read = i;
4003                                 __iwl4965_rx_replenish(priv);
4004                                 count = 0;
4005                         }
4006                 }
4007         }
4008
4009         /* Backtrack one entry */
4010         priv->rxq.read = i;
4011         iwl4965_rx_queue_restock(priv);
4012 }
4013
4014 /**
4015  * iwl4965_tx_queue_update_write_ptr - Send new write index to hardware
4016  */
4017 static int iwl4965_tx_queue_update_write_ptr(struct iwl_priv *priv,
4018                                   struct iwl4965_tx_queue *txq)
4019 {
4020         u32 reg = 0;
4021         int rc = 0;
4022         int txq_id = txq->q.id;
4023
4024         if (txq->need_update == 0)
4025                 return rc;
4026
4027         /* if we're trying to save power */
4028         if (test_bit(STATUS_POWER_PMI, &priv->status)) {
4029                 /* wake up nic if it's powered down ...
4030                  * uCode will wake up, and interrupt us again, so next
4031                  * time we'll skip this part. */
4032                 reg = iwl_read32(priv, CSR_UCODE_DRV_GP1);
4033
4034                 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
4035                         IWL_DEBUG_INFO("Requesting wakeup, GP1 = 0x%x\n", reg);
4036                         iwl_set_bit(priv, CSR_GP_CNTRL,
4037                                     CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
4038                         return rc;
4039                 }
4040
4041                 /* restore this queue's parameters in nic hardware. */
4042                 rc = iwl_grab_nic_access(priv);
4043                 if (rc)
4044                         return rc;
4045                 iwl_write_direct32(priv, HBUS_TARG_WRPTR,
4046                                      txq->q.write_ptr | (txq_id << 8));
4047                 iwl_release_nic_access(priv);
4048
4049         /* else not in power-save mode, uCode will never sleep when we're
4050          * trying to tx (during RFKILL, we're not trying to tx). */
4051         } else
4052                 iwl_write32(priv, HBUS_TARG_WRPTR,
4053                             txq->q.write_ptr | (txq_id << 8));
4054
4055         txq->need_update = 0;
4056
4057         return rc;
4058 }
4059
4060 #ifdef CONFIG_IWLWIFI_DEBUG
4061 static void iwl4965_print_rx_config_cmd(struct iwl4965_rxon_cmd *rxon)
4062 {
4063         DECLARE_MAC_BUF(mac);
4064
4065         IWL_DEBUG_RADIO("RX CONFIG:\n");
4066         iwl_print_hex_dump(IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
4067         IWL_DEBUG_RADIO("u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
4068         IWL_DEBUG_RADIO("u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
4069         IWL_DEBUG_RADIO("u32 filter_flags: 0x%08x\n",
4070                         le32_to_cpu(rxon->filter_flags));
4071         IWL_DEBUG_RADIO("u8 dev_type: 0x%x\n", rxon->dev_type);
4072         IWL_DEBUG_RADIO("u8 ofdm_basic_rates: 0x%02x\n",
4073                         rxon->ofdm_basic_rates);
4074         IWL_DEBUG_RADIO("u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
4075         IWL_DEBUG_RADIO("u8[6] node_addr: %s\n",
4076                         print_mac(mac, rxon->node_addr));
4077         IWL_DEBUG_RADIO("u8[6] bssid_addr: %s\n",
4078                         print_mac(mac, rxon->bssid_addr));
4079         IWL_DEBUG_RADIO("u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
4080 }
4081 #endif
4082
4083 static void iwl4965_enable_interrupts(struct iwl_priv *priv)
4084 {
4085         IWL_DEBUG_ISR("Enabling interrupts\n");
4086         set_bit(STATUS_INT_ENABLED, &priv->status);
4087         iwl_write32(priv, CSR_INT_MASK, CSR_INI_SET_MASK);
4088 }
4089
4090 /* call this function to flush any scheduled tasklet */
4091 static inline void iwl_synchronize_irq(struct iwl_priv *priv)
4092 {
4093         /* wait to make sure we flush pedding tasklet*/
4094         synchronize_irq(priv->pci_dev->irq);
4095         tasklet_kill(&priv->irq_tasklet);
4096 }
4097
4098 static inline void iwl4965_disable_interrupts(struct iwl_priv *priv)
4099 {
4100         clear_bit(STATUS_INT_ENABLED, &priv->status);
4101
4102         /* disable interrupts from uCode/NIC to host */
4103         iwl_write32(priv, CSR_INT_MASK, 0x00000000);
4104
4105         /* acknowledge/clear/reset any interrupts still pending
4106          * from uCode or flow handler (Rx/Tx DMA) */
4107         iwl_write32(priv, CSR_INT, 0xffffffff);
4108         iwl_write32(priv, CSR_FH_INT_STATUS, 0xffffffff);
4109         IWL_DEBUG_ISR("Disabled interrupts\n");
4110 }
4111
4112 static const char *desc_lookup(int i)
4113 {
4114         switch (i) {
4115         case 1:
4116                 return "FAIL";
4117         case 2:
4118                 return "BAD_PARAM";
4119         case 3:
4120                 return "BAD_CHECKSUM";
4121         case 4:
4122                 return "NMI_INTERRUPT";
4123         case 5:
4124                 return "SYSASSERT";
4125         case 6:
4126                 return "FATAL_ERROR";
4127         }
4128
4129         return "UNKNOWN";
4130 }
4131
4132 #define ERROR_START_OFFSET  (1 * sizeof(u32))
4133 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
4134
4135 static void iwl4965_dump_nic_error_log(struct iwl_priv *priv)
4136 {
4137         u32 data2, line;
4138         u32 desc, time, count, base, data1;
4139         u32 blink1, blink2, ilink1, ilink2;
4140         int rc;
4141
4142         base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
4143
4144         if (!priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
4145                 IWL_ERROR("Not valid error log pointer 0x%08X\n", base);
4146                 return;
4147         }
4148
4149         rc = iwl_grab_nic_access(priv);
4150         if (rc) {
4151                 IWL_WARNING("Can not read from adapter at this time.\n");
4152                 return;
4153         }
4154
4155         count = iwl_read_targ_mem(priv, base);
4156
4157         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
4158                 IWL_ERROR("Start IWL Error Log Dump:\n");
4159                 IWL_ERROR("Status: 0x%08lX, count: %d\n", priv->status, count);
4160         }
4161
4162         desc = iwl_read_targ_mem(priv, base + 1 * sizeof(u32));
4163         blink1 = iwl_read_targ_mem(priv, base + 3 * sizeof(u32));
4164         blink2 = iwl_read_targ_mem(priv, base + 4 * sizeof(u32));
4165         ilink1 = iwl_read_targ_mem(priv, base + 5 * sizeof(u32));
4166         ilink2 = iwl_read_targ_mem(priv, base + 6 * sizeof(u32));
4167         data1 = iwl_read_targ_mem(priv, base + 7 * sizeof(u32));
4168         data2 = iwl_read_targ_mem(priv, base + 8 * sizeof(u32));
4169         line = iwl_read_targ_mem(priv, base + 9 * sizeof(u32));
4170         time = iwl_read_targ_mem(priv, base + 11 * sizeof(u32));
4171
4172         IWL_ERROR("Desc               Time       "
4173                   "data1      data2      line\n");
4174         IWL_ERROR("%-13s (#%d) %010u 0x%08X 0x%08X %u\n",
4175                   desc_lookup(desc), desc, time, data1, data2, line);
4176         IWL_ERROR("blink1  blink2  ilink1  ilink2\n");
4177         IWL_ERROR("0x%05X 0x%05X 0x%05X 0x%05X\n", blink1, blink2,
4178                   ilink1, ilink2);
4179
4180         iwl_release_nic_access(priv);
4181 }
4182
4183 #define EVENT_START_OFFSET  (4 * sizeof(u32))
4184
4185 /**
4186  * iwl4965_print_event_log - Dump error event log to syslog
4187  *
4188  * NOTE: Must be called with iwl_grab_nic_access() already obtained!
4189  */
4190 static void iwl4965_print_event_log(struct iwl_priv *priv, u32 start_idx,
4191                                 u32 num_events, u32 mode)
4192 {
4193         u32 i;
4194         u32 base;       /* SRAM byte address of event log header */
4195         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
4196         u32 ptr;        /* SRAM byte address of log data */
4197         u32 ev, time, data; /* event log data */
4198
4199         if (num_events == 0)
4200                 return;
4201
4202         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
4203
4204         if (mode == 0)
4205                 event_size = 2 * sizeof(u32);
4206         else
4207                 event_size = 3 * sizeof(u32);
4208
4209         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
4210
4211         /* "time" is actually "data" for mode 0 (no timestamp).
4212          * place event id # at far right for easier visual parsing. */
4213         for (i = 0; i < num_events; i++) {
4214                 ev = iwl_read_targ_mem(priv, ptr);
4215                 ptr += sizeof(u32);
4216                 time = iwl_read_targ_mem(priv, ptr);
4217                 ptr += sizeof(u32);
4218                 if (mode == 0)
4219                         IWL_ERROR("0x%08x\t%04u\n", time, ev); /* data, ev */
4220                 else {
4221                         data = iwl_read_targ_mem(priv, ptr);
4222                         ptr += sizeof(u32);
4223                         IWL_ERROR("%010u\t0x%08x\t%04u\n", time, data, ev);
4224                 }
4225         }
4226 }
4227
4228 static void iwl4965_dump_nic_event_log(struct iwl_priv *priv)
4229 {
4230         int rc;
4231         u32 base;       /* SRAM byte address of event log header */
4232         u32 capacity;   /* event log capacity in # entries */
4233         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
4234         u32 num_wraps;  /* # times uCode wrapped to top of log */
4235         u32 next_entry; /* index of next entry to be written by uCode */
4236         u32 size;       /* # entries that we'll print */
4237
4238         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
4239         if (!priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
4240                 IWL_ERROR("Invalid event log pointer 0x%08X\n", base);
4241                 return;
4242         }
4243
4244         rc = iwl_grab_nic_access(priv);
4245         if (rc) {
4246                 IWL_WARNING("Can not read from adapter at this time.\n");
4247                 return;
4248         }
4249
4250         /* event log header */
4251         capacity = iwl_read_targ_mem(priv, base);
4252         mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
4253         num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
4254         next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
4255
4256         size = num_wraps ? capacity : next_entry;
4257
4258         /* bail out if nothing in log */
4259         if (size == 0) {
4260                 IWL_ERROR("Start IWL Event Log Dump: nothing in log\n");
4261                 iwl_release_nic_access(priv);
4262                 return;
4263         }
4264
4265         IWL_ERROR("Start IWL Event Log Dump: display count %d, wraps %d\n",
4266                   size, num_wraps);
4267
4268         /* if uCode has wrapped back to top of log, start at the oldest entry,
4269          * i.e the next one that uCode would fill. */
4270         if (num_wraps)
4271                 iwl4965_print_event_log(priv, next_entry,
4272                                     capacity - next_entry, mode);
4273
4274         /* (then/else) start at top of log */
4275         iwl4965_print_event_log(priv, 0, next_entry, mode);
4276
4277         iwl_release_nic_access(priv);
4278 }
4279
4280 /**
4281  * iwl4965_irq_handle_error - called for HW or SW error interrupt from card
4282  */
4283 static void iwl4965_irq_handle_error(struct iwl_priv *priv)
4284 {
4285         /* Set the FW error flag -- cleared on iwl4965_down */
4286         set_bit(STATUS_FW_ERROR, &priv->status);
4287
4288         /* Cancel currently queued command. */
4289         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
4290
4291 #ifdef CONFIG_IWLWIFI_DEBUG
4292         if (iwl_debug_level & IWL_DL_FW_ERRORS) {
4293                 iwl4965_dump_nic_error_log(priv);
4294                 iwl4965_dump_nic_event_log(priv);
4295                 iwl4965_print_rx_config_cmd(&priv->staging_rxon);
4296         }
4297 #endif
4298
4299         wake_up_interruptible(&priv->wait_command_queue);
4300
4301         /* Keep the restart process from trying to send host
4302          * commands by clearing the INIT status bit */
4303         clear_bit(STATUS_READY, &priv->status);
4304
4305         if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
4306                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_FW_ERRORS,
4307                           "Restarting adapter due to uCode error.\n");
4308
4309                 if (iwl_is_associated(priv)) {
4310                         memcpy(&priv->recovery_rxon, &priv->active_rxon,
4311                                sizeof(priv->recovery_rxon));
4312                         priv->error_recovering = 1;
4313                 }
4314                 queue_work(priv->workqueue, &priv->restart);
4315         }
4316 }
4317
4318 static void iwl4965_error_recovery(struct iwl_priv *priv)
4319 {
4320         unsigned long flags;
4321
4322         memcpy(&priv->staging_rxon, &priv->recovery_rxon,
4323                sizeof(priv->staging_rxon));
4324         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
4325         iwl4965_commit_rxon(priv);
4326
4327         iwl4965_rxon_add_station(priv, priv->bssid, 1);
4328
4329         spin_lock_irqsave(&priv->lock, flags);
4330         priv->assoc_id = le16_to_cpu(priv->staging_rxon.assoc_id);
4331         priv->error_recovering = 0;
4332         spin_unlock_irqrestore(&priv->lock, flags);
4333 }
4334
4335 static void iwl4965_irq_tasklet(struct iwl_priv *priv)
4336 {
4337         u32 inta, handled = 0;
4338         u32 inta_fh;
4339         unsigned long flags;
4340 #ifdef CONFIG_IWLWIFI_DEBUG
4341         u32 inta_mask;
4342 #endif
4343
4344         spin_lock_irqsave(&priv->lock, flags);
4345
4346         /* Ack/clear/reset pending uCode interrupts.
4347          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
4348          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
4349         inta = iwl_read32(priv, CSR_INT);
4350         iwl_write32(priv, CSR_INT, inta);
4351
4352         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
4353          * Any new interrupts that happen after this, either while we're
4354          * in this tasklet, or later, will show up in next ISR/tasklet. */
4355         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
4356         iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
4357
4358 #ifdef CONFIG_IWLWIFI_DEBUG
4359         if (iwl_debug_level & IWL_DL_ISR) {
4360                 /* just for debug */
4361                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
4362                 IWL_DEBUG_ISR("inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
4363                               inta, inta_mask, inta_fh);
4364         }
4365 #endif
4366
4367         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
4368          * atomic, make sure that inta covers all the interrupts that
4369          * we've discovered, even if FH interrupt came in just after
4370          * reading CSR_INT. */
4371         if (inta_fh & CSR49_FH_INT_RX_MASK)
4372                 inta |= CSR_INT_BIT_FH_RX;
4373         if (inta_fh & CSR49_FH_INT_TX_MASK)
4374                 inta |= CSR_INT_BIT_FH_TX;
4375
4376         /* Now service all interrupt bits discovered above. */
4377         if (inta & CSR_INT_BIT_HW_ERR) {
4378                 IWL_ERROR("Microcode HW error detected.  Restarting.\n");
4379
4380                 /* Tell the device to stop sending interrupts */
4381                 iwl4965_disable_interrupts(priv);
4382
4383                 iwl4965_irq_handle_error(priv);
4384
4385                 handled |= CSR_INT_BIT_HW_ERR;
4386
4387                 spin_unlock_irqrestore(&priv->lock, flags);
4388
4389                 return;
4390         }
4391
4392 #ifdef CONFIG_IWLWIFI_DEBUG
4393         if (iwl_debug_level & (IWL_DL_ISR)) {
4394                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
4395                 if (inta & CSR_INT_BIT_SCD)
4396                         IWL_DEBUG_ISR("Scheduler finished to transmit "
4397                                       "the frame/frames.\n");
4398
4399                 /* Alive notification via Rx interrupt will do the real work */
4400                 if (inta & CSR_INT_BIT_ALIVE)
4401                         IWL_DEBUG_ISR("Alive interrupt\n");
4402         }
4403 #endif
4404         /* Safely ignore these bits for debug checks below */
4405         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
4406
4407         /* HW RF KILL switch toggled */
4408         if (inta & CSR_INT_BIT_RF_KILL) {
4409                 int hw_rf_kill = 0;
4410                 if (!(iwl_read32(priv, CSR_GP_CNTRL) &
4411                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
4412                         hw_rf_kill = 1;
4413
4414                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL | IWL_DL_ISR,
4415                                 "RF_KILL bit toggled to %s.\n",
4416                                 hw_rf_kill ? "disable radio":"enable radio");
4417
4418                 /* Queue restart only if RF_KILL switch was set to "kill"
4419                  *   when we loaded driver, and is now set to "enable".
4420                  * After we're Alive, RF_KILL gets handled by
4421                  *   iwl4965_rx_card_state_notif() */
4422                 if (!hw_rf_kill && !test_bit(STATUS_ALIVE, &priv->status)) {
4423                         clear_bit(STATUS_RF_KILL_HW, &priv->status);
4424                         queue_work(priv->workqueue, &priv->restart);
4425                 }
4426
4427                 handled |= CSR_INT_BIT_RF_KILL;
4428         }
4429
4430         /* Chip got too hot and stopped itself */
4431         if (inta & CSR_INT_BIT_CT_KILL) {
4432                 IWL_ERROR("Microcode CT kill error detected.\n");
4433                 handled |= CSR_INT_BIT_CT_KILL;
4434         }
4435
4436         /* Error detected by uCode */
4437         if (inta & CSR_INT_BIT_SW_ERR) {
4438                 IWL_ERROR("Microcode SW error detected.  Restarting 0x%X.\n",
4439                           inta);
4440                 iwl4965_irq_handle_error(priv);
4441                 handled |= CSR_INT_BIT_SW_ERR;
4442         }
4443
4444         /* uCode wakes up after power-down sleep */
4445         if (inta & CSR_INT_BIT_WAKEUP) {
4446                 IWL_DEBUG_ISR("Wakeup interrupt\n");
4447                 iwl4965_rx_queue_update_write_ptr(priv, &priv->rxq);
4448                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[0]);
4449                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[1]);
4450                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[2]);
4451                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[3]);
4452                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[4]);
4453                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[5]);
4454
4455                 handled |= CSR_INT_BIT_WAKEUP;
4456         }
4457
4458         /* All uCode command responses, including Tx command responses,
4459          * Rx "responses" (frame-received notification), and other
4460          * notifications from uCode come through here*/
4461         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
4462                 iwl4965_rx_handle(priv);
4463                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
4464         }
4465
4466         if (inta & CSR_INT_BIT_FH_TX) {
4467                 IWL_DEBUG_ISR("Tx interrupt\n");
4468                 handled |= CSR_INT_BIT_FH_TX;
4469         }
4470
4471         if (inta & ~handled)
4472                 IWL_ERROR("Unhandled INTA bits 0x%08x\n", inta & ~handled);
4473
4474         if (inta & ~CSR_INI_SET_MASK) {
4475                 IWL_WARNING("Disabled INTA bits 0x%08x were pending\n",
4476                          inta & ~CSR_INI_SET_MASK);
4477                 IWL_WARNING("   with FH_INT = 0x%08x\n", inta_fh);
4478         }
4479
4480         /* Re-enable all interrupts */
4481         /* only Re-enable if diabled by irq */
4482         if (test_bit(STATUS_INT_ENABLED, &priv->status))
4483                 iwl4965_enable_interrupts(priv);
4484
4485 #ifdef CONFIG_IWLWIFI_DEBUG
4486         if (iwl_debug_level & (IWL_DL_ISR)) {
4487                 inta = iwl_read32(priv, CSR_INT);
4488                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
4489                 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
4490                 IWL_DEBUG_ISR("End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
4491                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
4492         }
4493 #endif
4494         spin_unlock_irqrestore(&priv->lock, flags);
4495 }
4496
4497 static irqreturn_t iwl4965_isr(int irq, void *data)
4498 {
4499         struct iwl_priv *priv = data;
4500         u32 inta, inta_mask;
4501         u32 inta_fh;
4502         if (!priv)
4503                 return IRQ_NONE;
4504
4505         spin_lock(&priv->lock);
4506
4507         /* Disable (but don't clear!) interrupts here to avoid
4508          *    back-to-back ISRs and sporadic interrupts from our NIC.
4509          * If we have something to service, the tasklet will re-enable ints.
4510          * If we *don't* have something, we'll re-enable before leaving here. */
4511         inta_mask = iwl_read32(priv, CSR_INT_MASK);  /* just for debug */
4512         iwl_write32(priv, CSR_INT_MASK, 0x00000000);
4513
4514         /* Discover which interrupts are active/pending */
4515         inta = iwl_read32(priv, CSR_INT);
4516         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
4517
4518         /* Ignore interrupt if there's nothing in NIC to service.
4519          * This may be due to IRQ shared with another device,
4520          * or due to sporadic interrupts thrown from our NIC. */
4521         if (!inta && !inta_fh) {
4522                 IWL_DEBUG_ISR("Ignore interrupt, inta == 0, inta_fh == 0\n");
4523                 goto none;
4524         }
4525
4526         if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
4527                 /* Hardware disappeared. It might have already raised
4528                  * an interrupt */
4529                 IWL_WARNING("HARDWARE GONE?? INTA == 0x%080x\n", inta);
4530                 goto unplugged;
4531         }
4532
4533         IWL_DEBUG_ISR("ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
4534                       inta, inta_mask, inta_fh);
4535
4536         inta &= ~CSR_INT_BIT_SCD;
4537
4538         /* iwl4965_irq_tasklet() will service interrupts and re-enable them */
4539         if (likely(inta || inta_fh))
4540                 tasklet_schedule(&priv->irq_tasklet);
4541
4542  unplugged:
4543         spin_unlock(&priv->lock);
4544         return IRQ_HANDLED;
4545
4546  none:
4547         /* re-enable interrupts here since we don't have anything to service. */
4548         /* only Re-enable if diabled by irq */
4549         if (test_bit(STATUS_INT_ENABLED, &priv->status))
4550                 iwl4965_enable_interrupts(priv);
4551         spin_unlock(&priv->lock);
4552         return IRQ_NONE;
4553 }
4554
4555 /* For active scan, listen ACTIVE_DWELL_TIME (msec) on each channel after
4556  * sending probe req.  This should be set long enough to hear probe responses
4557  * from more than one AP.  */
4558 #define IWL_ACTIVE_DWELL_TIME_24    (20)        /* all times in msec */
4559 #define IWL_ACTIVE_DWELL_TIME_52    (10)
4560
4561 /* For faster active scanning, scan will move to the next channel if fewer than
4562  * PLCP_QUIET_THRESH packets are heard on this channel within
4563  * ACTIVE_QUIET_TIME after sending probe request.  This shortens the dwell
4564  * time if it's a quiet channel (nothing responded to our probe, and there's
4565  * no other traffic).
4566  * Disable "quiet" feature by setting PLCP_QUIET_THRESH to 0. */
4567 #define IWL_PLCP_QUIET_THRESH       __constant_cpu_to_le16(1)   /* packets */
4568 #define IWL_ACTIVE_QUIET_TIME       __constant_cpu_to_le16(5)   /* msec */
4569
4570 /* For passive scan, listen PASSIVE_DWELL_TIME (msec) on each channel.
4571  * Must be set longer than active dwell time.
4572  * For the most reliable scan, set > AP beacon interval (typically 100msec). */
4573 #define IWL_PASSIVE_DWELL_TIME_24   (20)        /* all times in msec */
4574 #define IWL_PASSIVE_DWELL_TIME_52   (10)
4575 #define IWL_PASSIVE_DWELL_BASE      (100)
4576 #define IWL_CHANNEL_TUNE_TIME       5
4577
4578 static inline u16 iwl4965_get_active_dwell_time(struct iwl_priv *priv,
4579                                                 enum ieee80211_band band)
4580 {
4581         if (band == IEEE80211_BAND_5GHZ)
4582                 return IWL_ACTIVE_DWELL_TIME_52;
4583         else
4584                 return IWL_ACTIVE_DWELL_TIME_24;
4585 }
4586
4587 static u16 iwl4965_get_passive_dwell_time(struct iwl_priv *priv,
4588                                           enum ieee80211_band band)
4589 {
4590         u16 active = iwl4965_get_active_dwell_time(priv, band);
4591         u16 passive = (band != IEEE80211_BAND_5GHZ) ?
4592             IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_24 :
4593             IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_52;
4594
4595         if (iwl_is_associated(priv)) {
4596                 /* If we're associated, we clamp the maximum passive
4597                  * dwell time to be 98% of the beacon interval (minus
4598                  * 2 * channel tune time) */
4599                 passive = priv->beacon_int;
4600                 if ((passive > IWL_PASSIVE_DWELL_BASE) || !passive)
4601                         passive = IWL_PASSIVE_DWELL_BASE;
4602                 passive = (passive * 98) / 100 - IWL_CHANNEL_TUNE_TIME * 2;
4603         }
4604
4605         if (passive <= active)
4606                 passive = active + 1;
4607
4608         return passive;
4609 }
4610
4611 static int iwl4965_get_channels_for_scan(struct iwl_priv *priv,
4612                                          enum ieee80211_band band,
4613                                      u8 is_active, u8 direct_mask,
4614                                      struct iwl4965_scan_channel *scan_ch)
4615 {
4616         const struct ieee80211_channel *channels = NULL;
4617         const struct ieee80211_supported_band *sband;
4618         const struct iwl_channel_info *ch_info;
4619         u16 passive_dwell = 0;
4620         u16 active_dwell = 0;
4621         int added, i;
4622
4623         sband = iwl4965_get_hw_mode(priv, band);
4624         if (!sband)
4625                 return 0;
4626
4627         channels = sband->channels;
4628
4629         active_dwell = iwl4965_get_active_dwell_time(priv, band);
4630         passive_dwell = iwl4965_get_passive_dwell_time(priv, band);
4631
4632         for (i = 0, added = 0; i < sband->n_channels; i++) {
4633                 if (channels[i].flags & IEEE80211_CHAN_DISABLED)
4634                         continue;
4635
4636                 scan_ch->channel = ieee80211_frequency_to_channel(channels[i].center_freq);
4637
4638                 ch_info = iwl_get_channel_info(priv, band,
4639                                          scan_ch->channel);
4640                 if (!is_channel_valid(ch_info)) {
4641                         IWL_DEBUG_SCAN("Channel %d is INVALID for this SKU.\n",
4642                                        scan_ch->channel);
4643                         continue;
4644                 }
4645
4646                 if (!is_active || is_channel_passive(ch_info) ||
4647                     (channels[i].flags & IEEE80211_CHAN_PASSIVE_SCAN))
4648                         scan_ch->type = 0;      /* passive */
4649                 else
4650                         scan_ch->type = 1;      /* active */
4651
4652                 if (scan_ch->type & 1)
4653                         scan_ch->type |= (direct_mask << 1);
4654
4655                 if (is_channel_narrow(ch_info))
4656                         scan_ch->type |= (1 << 7);
4657
4658                 scan_ch->active_dwell = cpu_to_le16(active_dwell);
4659                 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
4660
4661                 /* Set txpower levels to defaults */
4662                 scan_ch->tpc.dsp_atten = 110;
4663                 /* scan_pwr_info->tpc.dsp_atten; */
4664
4665                 /*scan_pwr_info->tpc.tx_gain; */
4666                 if (band == IEEE80211_BAND_5GHZ)
4667                         scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
4668                 else {
4669                         scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
4670                         /* NOTE: if we were doing 6Mb OFDM for scans we'd use
4671                          * power level:
4672                          * scan_ch->tpc.tx_gain = ((1 << 5) | (2 << 3)) | 3;
4673                          */
4674                 }
4675
4676                 IWL_DEBUG_SCAN("Scanning %d [%s %d]\n",
4677                                scan_ch->channel,
4678                                (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
4679                                (scan_ch->type & 1) ?
4680                                active_dwell : passive_dwell);
4681
4682                 scan_ch++;
4683                 added++;
4684         }
4685
4686         IWL_DEBUG_SCAN("total channels to scan %d \n", added);
4687         return added;
4688 }
4689
4690 static void iwl4965_init_hw_rates(struct iwl_priv *priv,
4691                               struct ieee80211_rate *rates)
4692 {
4693         int i;
4694
4695         for (i = 0; i < IWL_RATE_COUNT; i++) {
4696                 rates[i].bitrate = iwl4965_rates[i].ieee * 5;
4697                 rates[i].hw_value = i; /* Rate scaling will work on indexes */
4698                 rates[i].hw_value_short = i;
4699                 rates[i].flags = 0;
4700                 if ((i > IWL_LAST_OFDM_RATE) || (i < IWL_FIRST_OFDM_RATE)) {
4701                         /*
4702                          * If CCK != 1M then set short preamble rate flag.
4703                          */
4704                         rates[i].flags |=
4705                                 (iwl4965_rates[i].plcp == IWL_RATE_1M_PLCP) ?
4706                                         0 : IEEE80211_RATE_SHORT_PREAMBLE;
4707                 }
4708         }
4709 }
4710
4711 /**
4712  * iwl4965_init_geos - Initialize mac80211's geo/channel info based from eeprom
4713  */
4714 int iwl4965_init_geos(struct iwl_priv *priv)
4715 {
4716         struct iwl_channel_info *ch;
4717         struct ieee80211_supported_band *sband;
4718         struct ieee80211_channel *channels;
4719         struct ieee80211_channel *geo_ch;
4720         struct ieee80211_rate *rates;
4721         int i = 0;
4722
4723         if (priv->bands[IEEE80211_BAND_2GHZ].n_bitrates ||
4724             priv->bands[IEEE80211_BAND_5GHZ].n_bitrates) {
4725                 IWL_DEBUG_INFO("Geography modes already initialized.\n");
4726                 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
4727                 return 0;
4728         }
4729
4730         channels = kzalloc(sizeof(struct ieee80211_channel) *
4731                            priv->channel_count, GFP_KERNEL);
4732         if (!channels)
4733                 return -ENOMEM;
4734
4735         rates = kzalloc((sizeof(struct ieee80211_rate) * (IWL_RATE_COUNT + 1)),
4736                         GFP_KERNEL);
4737         if (!rates) {
4738                 kfree(channels);
4739                 return -ENOMEM;
4740         }
4741
4742         /* 5.2GHz channels start after the 2.4GHz channels */
4743         sband = &priv->bands[IEEE80211_BAND_5GHZ];
4744         sband->channels = &channels[ARRAY_SIZE(iwl_eeprom_band_1)];
4745         /* just OFDM */
4746         sband->bitrates = &rates[IWL_FIRST_OFDM_RATE];
4747         sband->n_bitrates = IWL_RATE_COUNT - IWL_FIRST_OFDM_RATE;
4748
4749         iwl4965_init_ht_hw_capab(priv, &sband->ht_info, IEEE80211_BAND_5GHZ);
4750
4751         sband = &priv->bands[IEEE80211_BAND_2GHZ];
4752         sband->channels = channels;
4753         /* OFDM & CCK */
4754         sband->bitrates = rates;
4755         sband->n_bitrates = IWL_RATE_COUNT;
4756
4757         iwl4965_init_ht_hw_capab(priv, &sband->ht_info, IEEE80211_BAND_2GHZ);
4758
4759         priv->ieee_channels = channels;
4760         priv->ieee_rates = rates;
4761
4762         iwl4965_init_hw_rates(priv, rates);
4763
4764         for (i = 0;  i < priv->channel_count; i++) {
4765                 ch = &priv->channel_info[i];
4766
4767                 /* FIXME: might be removed if scan is OK */
4768                 if (!is_channel_valid(ch))
4769                         continue;
4770
4771                 if (is_channel_a_band(ch))
4772                         sband =  &priv->bands[IEEE80211_BAND_5GHZ];
4773                 else
4774                         sband =  &priv->bands[IEEE80211_BAND_2GHZ];
4775
4776                 geo_ch = &sband->channels[sband->n_channels++];
4777
4778                 geo_ch->center_freq = ieee80211_channel_to_frequency(ch->channel);
4779                 geo_ch->max_power = ch->max_power_avg;
4780                 geo_ch->max_antenna_gain = 0xff;
4781                 geo_ch->hw_value = ch->channel;
4782
4783                 if (is_channel_valid(ch)) {
4784                         if (!(ch->flags & EEPROM_CHANNEL_IBSS))
4785                                 geo_ch->flags |= IEEE80211_CHAN_NO_IBSS;
4786
4787                         if (!(ch->flags & EEPROM_CHANNEL_ACTIVE))
4788                                 geo_ch->flags |= IEEE80211_CHAN_PASSIVE_SCAN;
4789
4790                         if (ch->flags & EEPROM_CHANNEL_RADAR)
4791                                 geo_ch->flags |= IEEE80211_CHAN_RADAR;
4792
4793                         if (ch->max_power_avg > priv->max_channel_txpower_limit)
4794                                 priv->max_channel_txpower_limit =
4795                                     ch->max_power_avg;
4796                 } else {
4797                         geo_ch->flags |= IEEE80211_CHAN_DISABLED;
4798                 }
4799
4800                 /* Save flags for reg domain usage */
4801                 geo_ch->orig_flags = geo_ch->flags;
4802
4803                 IWL_DEBUG_INFO("Channel %d Freq=%d[%sGHz] %s flag=0%X\n",
4804                                 ch->channel, geo_ch->center_freq,
4805                                 is_channel_a_band(ch) ?  "5.2" : "2.4",
4806                                 geo_ch->flags & IEEE80211_CHAN_DISABLED ?
4807                                 "restricted" : "valid",
4808                                  geo_ch->flags);
4809         }
4810
4811         if ((priv->bands[IEEE80211_BAND_5GHZ].n_channels == 0) &&
4812              priv->cfg->sku & IWL_SKU_A) {
4813                 printk(KERN_INFO DRV_NAME
4814                        ": Incorrectly detected BG card as ABG.  Please send "
4815                        "your PCI ID 0x%04X:0x%04X to maintainer.\n",
4816                        priv->pci_dev->device, priv->pci_dev->subsystem_device);
4817                 priv->cfg->sku &= ~IWL_SKU_A;
4818         }
4819
4820         printk(KERN_INFO DRV_NAME
4821                ": Tunable channels: %d 802.11bg, %d 802.11a channels\n",
4822                priv->bands[IEEE80211_BAND_2GHZ].n_channels,
4823                priv->bands[IEEE80211_BAND_5GHZ].n_channels);
4824
4825         if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
4826                 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
4827                         &priv->bands[IEEE80211_BAND_2GHZ];
4828         if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
4829                 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
4830                         &priv->bands[IEEE80211_BAND_5GHZ];
4831
4832         set_bit(STATUS_GEO_CONFIGURED, &priv->status);
4833
4834         return 0;
4835 }
4836
4837 /*
4838  * iwl4965_free_geos - undo allocations in iwl4965_init_geos
4839  */
4840 void iwl4965_free_geos(struct iwl_priv *priv)
4841 {
4842         kfree(priv->ieee_channels);
4843         kfree(priv->ieee_rates);
4844         clear_bit(STATUS_GEO_CONFIGURED, &priv->status);
4845 }
4846
4847 /******************************************************************************
4848  *
4849  * uCode download functions
4850  *
4851  ******************************************************************************/
4852
4853 static void iwl4965_dealloc_ucode_pci(struct iwl_priv *priv)
4854 {
4855         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
4856         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
4857         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
4858         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
4859         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
4860         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
4861 }
4862
4863 /**
4864  * iwl4965_verify_inst_full - verify runtime uCode image in card vs. host,
4865  *     looking at all data.
4866  */
4867 static int iwl4965_verify_inst_full(struct iwl_priv *priv, __le32 *image,
4868                                  u32 len)
4869 {
4870         u32 val;
4871         u32 save_len = len;
4872         int rc = 0;
4873         u32 errcnt;
4874
4875         IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
4876
4877         rc = iwl_grab_nic_access(priv);
4878         if (rc)
4879                 return rc;
4880
4881         iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR, RTC_INST_LOWER_BOUND);
4882
4883         errcnt = 0;
4884         for (; len > 0; len -= sizeof(u32), image++) {
4885                 /* read data comes through single port, auto-incr addr */
4886                 /* NOTE: Use the debugless read so we don't flood kernel log
4887                  * if IWL_DL_IO is set */
4888                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
4889                 if (val != le32_to_cpu(*image)) {
4890                         IWL_ERROR("uCode INST section is invalid at "
4891                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
4892                                   save_len - len, val, le32_to_cpu(*image));
4893                         rc = -EIO;
4894                         errcnt++;
4895                         if (errcnt >= 20)
4896                                 break;
4897                 }
4898         }
4899
4900         iwl_release_nic_access(priv);
4901
4902         if (!errcnt)
4903                 IWL_DEBUG_INFO
4904                     ("ucode image in INSTRUCTION memory is good\n");
4905
4906         return rc;
4907 }
4908
4909
4910 /**
4911  * iwl4965_verify_inst_sparse - verify runtime uCode image in card vs. host,
4912  *   using sample data 100 bytes apart.  If these sample points are good,
4913  *   it's a pretty good bet that everything between them is good, too.
4914  */
4915 static int iwl4965_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
4916 {
4917         u32 val;
4918         int rc = 0;
4919         u32 errcnt = 0;
4920         u32 i;
4921
4922         IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
4923
4924         rc = iwl_grab_nic_access(priv);
4925         if (rc)
4926                 return rc;
4927
4928         for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
4929                 /* read data comes through single port, auto-incr addr */
4930                 /* NOTE: Use the debugless read so we don't flood kernel log
4931                  * if IWL_DL_IO is set */
4932                 iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
4933                         i + RTC_INST_LOWER_BOUND);
4934                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
4935                 if (val != le32_to_cpu(*image)) {
4936 #if 0 /* Enable this if you want to see details */
4937                         IWL_ERROR("uCode INST section is invalid at "
4938                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
4939                                   i, val, *image);
4940 #endif
4941                         rc = -EIO;
4942                         errcnt++;
4943                         if (errcnt >= 3)
4944                                 break;
4945                 }
4946         }
4947
4948         iwl_release_nic_access(priv);
4949
4950         return rc;
4951 }
4952
4953
4954 /**
4955  * iwl4965_verify_ucode - determine which instruction image is in SRAM,
4956  *    and verify its contents
4957  */
4958 static int iwl4965_verify_ucode(struct iwl_priv *priv)
4959 {
4960         __le32 *image;
4961         u32 len;
4962         int rc = 0;
4963
4964         /* Try bootstrap */
4965         image = (__le32 *)priv->ucode_boot.v_addr;
4966         len = priv->ucode_boot.len;
4967         rc = iwl4965_verify_inst_sparse(priv, image, len);
4968         if (rc == 0) {
4969                 IWL_DEBUG_INFO("Bootstrap uCode is good in inst SRAM\n");
4970                 return 0;
4971         }
4972
4973         /* Try initialize */
4974         image = (__le32 *)priv->ucode_init.v_addr;
4975         len = priv->ucode_init.len;
4976         rc = iwl4965_verify_inst_sparse(priv, image, len);
4977         if (rc == 0) {
4978                 IWL_DEBUG_INFO("Initialize uCode is good in inst SRAM\n");
4979                 return 0;
4980         }
4981
4982         /* Try runtime/protocol */
4983         image = (__le32 *)priv->ucode_code.v_addr;
4984         len = priv->ucode_code.len;
4985         rc = iwl4965_verify_inst_sparse(priv, image, len);
4986         if (rc == 0) {
4987                 IWL_DEBUG_INFO("Runtime uCode is good in inst SRAM\n");
4988                 return 0;
4989         }
4990
4991         IWL_ERROR("NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
4992
4993         /* Since nothing seems to match, show first several data entries in
4994          * instruction SRAM, so maybe visual inspection will give a clue.
4995          * Selection of bootstrap image (vs. other images) is arbitrary. */
4996         image = (__le32 *)priv->ucode_boot.v_addr;
4997         len = priv->ucode_boot.len;
4998         rc = iwl4965_verify_inst_full(priv, image, len);
4999
5000         return rc;
5001 }
5002
5003 static void iwl4965_nic_start(struct iwl_priv *priv)
5004 {
5005         /* Remove all resets to allow NIC to operate */
5006         iwl_write32(priv, CSR_RESET, 0);
5007 }
5008
5009
5010 /**
5011  * iwl4965_read_ucode - Read uCode images from disk file.
5012  *
5013  * Copy into buffers for card to fetch via bus-mastering
5014  */
5015 static int iwl4965_read_ucode(struct iwl_priv *priv)
5016 {
5017         struct iwl4965_ucode *ucode;
5018         int ret;
5019         const struct firmware *ucode_raw;
5020         const char *name = priv->cfg->fw_name;
5021         u8 *src;
5022         size_t len;
5023         u32 ver, inst_size, data_size, init_size, init_data_size, boot_size;
5024
5025         /* Ask kernel firmware_class module to get the boot firmware off disk.
5026          * request_firmware() is synchronous, file is in memory on return. */
5027         ret = request_firmware(&ucode_raw, name, &priv->pci_dev->dev);
5028         if (ret < 0) {
5029                 IWL_ERROR("%s firmware file req failed: Reason %d\n",
5030                                         name, ret);
5031                 goto error;
5032         }
5033
5034         IWL_DEBUG_INFO("Got firmware '%s' file (%zd bytes) from disk\n",
5035                        name, ucode_raw->size);
5036
5037         /* Make sure that we got at least our header! */
5038         if (ucode_raw->size < sizeof(*ucode)) {
5039                 IWL_ERROR("File size way too small!\n");
5040                 ret = -EINVAL;
5041                 goto err_release;
5042         }
5043
5044         /* Data from ucode file:  header followed by uCode images */
5045         ucode = (void *)ucode_raw->data;
5046
5047         ver = le32_to_cpu(ucode->ver);
5048         inst_size = le32_to_cpu(ucode->inst_size);
5049         data_size = le32_to_cpu(ucode->data_size);
5050         init_size = le32_to_cpu(ucode->init_size);
5051         init_data_size = le32_to_cpu(ucode->init_data_size);
5052         boot_size = le32_to_cpu(ucode->boot_size);
5053
5054         IWL_DEBUG_INFO("f/w package hdr ucode version = 0x%x\n", ver);
5055         IWL_DEBUG_INFO("f/w package hdr runtime inst size = %u\n",
5056                        inst_size);
5057         IWL_DEBUG_INFO("f/w package hdr runtime data size = %u\n",
5058                        data_size);
5059         IWL_DEBUG_INFO("f/w package hdr init inst size = %u\n",
5060                        init_size);
5061         IWL_DEBUG_INFO("f/w package hdr init data size = %u\n",
5062                        init_data_size);
5063         IWL_DEBUG_INFO("f/w package hdr boot inst size = %u\n",
5064                        boot_size);
5065
5066         /* Verify size of file vs. image size info in file's header */
5067         if (ucode_raw->size < sizeof(*ucode) +
5068                 inst_size + data_size + init_size +
5069                 init_data_size + boot_size) {
5070
5071                 IWL_DEBUG_INFO("uCode file size %d too small\n",
5072                                (int)ucode_raw->size);
5073                 ret = -EINVAL;
5074                 goto err_release;
5075         }
5076
5077         /* Verify that uCode images will fit in card's SRAM */
5078         if (inst_size > IWL_MAX_INST_SIZE) {
5079                 IWL_DEBUG_INFO("uCode instr len %d too large to fit in\n",
5080                                inst_size);
5081                 ret = -EINVAL;
5082                 goto err_release;
5083         }
5084
5085         if (data_size > IWL_MAX_DATA_SIZE) {
5086                 IWL_DEBUG_INFO("uCode data len %d too large to fit in\n",
5087                                 data_size);
5088                 ret = -EINVAL;
5089                 goto err_release;
5090         }
5091         if (init_size > IWL_MAX_INST_SIZE) {
5092                 IWL_DEBUG_INFO
5093                     ("uCode init instr len %d too large to fit in\n",
5094                       init_size);
5095                 ret = -EINVAL;
5096                 goto err_release;
5097         }
5098         if (init_data_size > IWL_MAX_DATA_SIZE) {
5099                 IWL_DEBUG_INFO
5100                     ("uCode init data len %d too large to fit in\n",
5101                       init_data_size);
5102                 ret = -EINVAL;
5103                 goto err_release;
5104         }
5105         if (boot_size > IWL_MAX_BSM_SIZE) {
5106                 IWL_DEBUG_INFO
5107                     ("uCode boot instr len %d too large to fit in\n",
5108                       boot_size);
5109                 ret = -EINVAL;
5110                 goto err_release;
5111         }
5112
5113         /* Allocate ucode buffers for card's bus-master loading ... */
5114
5115         /* Runtime instructions and 2 copies of data:
5116          * 1) unmodified from disk
5117          * 2) backup cache for save/restore during power-downs */
5118         priv->ucode_code.len = inst_size;
5119         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
5120
5121         priv->ucode_data.len = data_size;
5122         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
5123
5124         priv->ucode_data_backup.len = data_size;
5125         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
5126
5127         /* Initialization instructions and data */
5128         if (init_size && init_data_size) {
5129                 priv->ucode_init.len = init_size;
5130                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
5131
5132                 priv->ucode_init_data.len = init_data_size;
5133                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
5134
5135                 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
5136                         goto err_pci_alloc;
5137         }
5138
5139         /* Bootstrap (instructions only, no data) */
5140         if (boot_size) {
5141                 priv->ucode_boot.len = boot_size;
5142                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
5143
5144                 if (!priv->ucode_boot.v_addr)
5145                         goto err_pci_alloc;
5146         }
5147
5148         /* Copy images into buffers for card's bus-master reads ... */
5149
5150         /* Runtime instructions (first block of data in file) */
5151         src = &ucode->data[0];
5152         len = priv->ucode_code.len;
5153         IWL_DEBUG_INFO("Copying (but not loading) uCode instr len %Zd\n", len);
5154         memcpy(priv->ucode_code.v_addr, src, len);
5155         IWL_DEBUG_INFO("uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
5156                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
5157
5158         /* Runtime data (2nd block)
5159          * NOTE:  Copy into backup buffer will be done in iwl4965_up()  */
5160         src = &ucode->data[inst_size];
5161         len = priv->ucode_data.len;
5162         IWL_DEBUG_INFO("Copying (but not loading) uCode data len %Zd\n", len);
5163         memcpy(priv->ucode_data.v_addr, src, len);
5164         memcpy(priv->ucode_data_backup.v_addr, src, len);
5165
5166         /* Initialization instructions (3rd block) */
5167         if (init_size) {
5168                 src = &ucode->data[inst_size + data_size];
5169                 len = priv->ucode_init.len;
5170                 IWL_DEBUG_INFO("Copying (but not loading) init instr len %Zd\n",
5171                                 len);
5172                 memcpy(priv->ucode_init.v_addr, src, len);
5173         }
5174
5175         /* Initialization data (4th block) */
5176         if (init_data_size) {
5177                 src = &ucode->data[inst_size + data_size + init_size];
5178                 len = priv->ucode_init_data.len;
5179                 IWL_DEBUG_INFO("Copying (but not loading) init data len %Zd\n",
5180                                len);
5181                 memcpy(priv->ucode_init_data.v_addr, src, len);
5182         }
5183
5184         /* Bootstrap instructions (5th block) */
5185         src = &ucode->data[inst_size + data_size + init_size + init_data_size];
5186         len = priv->ucode_boot.len;
5187         IWL_DEBUG_INFO("Copying (but not loading) boot instr len %Zd\n", len);
5188         memcpy(priv->ucode_boot.v_addr, src, len);
5189
5190         /* We have our copies now, allow OS release its copies */
5191         release_firmware(ucode_raw);
5192         return 0;
5193
5194  err_pci_alloc:
5195         IWL_ERROR("failed to allocate pci memory\n");
5196         ret = -ENOMEM;
5197         iwl4965_dealloc_ucode_pci(priv);
5198
5199  err_release:
5200         release_firmware(ucode_raw);
5201
5202  error:
5203         return ret;
5204 }
5205
5206
5207 /**
5208  * iwl4965_set_ucode_ptrs - Set uCode address location
5209  *
5210  * Tell initialization uCode where to find runtime uCode.
5211  *
5212  * BSM registers initially contain pointers to initialization uCode.
5213  * We need to replace them to load runtime uCode inst and data,
5214  * and to save runtime data when powering down.
5215  */
5216 static int iwl4965_set_ucode_ptrs(struct iwl_priv *priv)
5217 {
5218         dma_addr_t pinst;
5219         dma_addr_t pdata;
5220         int rc = 0;
5221         unsigned long flags;
5222
5223         /* bits 35:4 for 4965 */
5224         pinst = priv->ucode_code.p_addr >> 4;
5225         pdata = priv->ucode_data_backup.p_addr >> 4;
5226
5227         spin_lock_irqsave(&priv->lock, flags);
5228         rc = iwl_grab_nic_access(priv);
5229         if (rc) {
5230                 spin_unlock_irqrestore(&priv->lock, flags);
5231                 return rc;
5232         }
5233
5234         /* Tell bootstrap uCode where to find image to load */
5235         iwl_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
5236         iwl_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
5237         iwl_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
5238                                  priv->ucode_data.len);
5239
5240         /* Inst bytecount must be last to set up, bit 31 signals uCode
5241          *   that all new ptr/size info is in place */
5242         iwl_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG,
5243                                  priv->ucode_code.len | BSM_DRAM_INST_LOAD);
5244
5245         iwl_release_nic_access(priv);
5246
5247         spin_unlock_irqrestore(&priv->lock, flags);
5248
5249         IWL_DEBUG_INFO("Runtime uCode pointers are set.\n");
5250
5251         return rc;
5252 }
5253
5254 /**
5255  * iwl4965_init_alive_start - Called after REPLY_ALIVE notification received
5256  *
5257  * Called after REPLY_ALIVE notification received from "initialize" uCode.
5258  *
5259  * The 4965 "initialize" ALIVE reply contains calibration data for:
5260  *   Voltage, temperature, and MIMO tx gain correction, now stored in priv
5261  *   (3945 does not contain this data).
5262  *
5263  * Tell "initialize" uCode to go ahead and load the runtime uCode.
5264 */
5265 static void iwl4965_init_alive_start(struct iwl_priv *priv)
5266 {
5267         /* Check alive response for "valid" sign from uCode */
5268         if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
5269                 /* We had an error bringing up the hardware, so take it
5270                  * all the way back down so we can try again */
5271                 IWL_DEBUG_INFO("Initialize Alive failed.\n");
5272                 goto restart;
5273         }
5274
5275         /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
5276          * This is a paranoid check, because we would not have gotten the
5277          * "initialize" alive if code weren't properly loaded.  */
5278         if (iwl4965_verify_ucode(priv)) {
5279                 /* Runtime instruction load was bad;
5280                  * take it all the way back down so we can try again */
5281                 IWL_DEBUG_INFO("Bad \"initialize\" uCode load.\n");
5282                 goto restart;
5283         }
5284
5285         /* Calculate temperature */
5286         priv->temperature = iwl4965_get_temperature(priv);
5287
5288         /* Send pointers to protocol/runtime uCode image ... init code will
5289          * load and launch runtime uCode, which will send us another "Alive"
5290          * notification. */
5291         IWL_DEBUG_INFO("Initialization Alive received.\n");
5292         if (iwl4965_set_ucode_ptrs(priv)) {
5293                 /* Runtime instruction load won't happen;
5294                  * take it all the way back down so we can try again */
5295                 IWL_DEBUG_INFO("Couldn't set up uCode pointers.\n");
5296                 goto restart;
5297         }
5298         return;
5299
5300  restart:
5301         queue_work(priv->workqueue, &priv->restart);
5302 }
5303
5304
5305 /**
5306  * iwl4965_alive_start - called after REPLY_ALIVE notification received
5307  *                   from protocol/runtime uCode (initialization uCode's
5308  *                   Alive gets handled by iwl4965_init_alive_start()).
5309  */
5310 static void iwl4965_alive_start(struct iwl_priv *priv)
5311 {
5312         int ret = 0;
5313
5314         IWL_DEBUG_INFO("Runtime Alive received.\n");
5315
5316         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
5317                 /* We had an error bringing up the hardware, so take it
5318                  * all the way back down so we can try again */
5319                 IWL_DEBUG_INFO("Alive failed.\n");
5320                 goto restart;
5321         }
5322
5323         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
5324          * This is a paranoid check, because we would not have gotten the
5325          * "runtime" alive if code weren't properly loaded.  */
5326         if (iwl4965_verify_ucode(priv)) {
5327                 /* Runtime instruction load was bad;
5328                  * take it all the way back down so we can try again */
5329                 IWL_DEBUG_INFO("Bad runtime uCode load.\n");
5330                 goto restart;
5331         }
5332
5333         iwlcore_clear_stations_table(priv);
5334
5335         ret = priv->cfg->ops->lib->alive_notify(priv);
5336         if (ret) {
5337                 IWL_WARNING("Could not complete ALIVE transition [ntf]: %d\n",
5338                             ret);
5339                 goto restart;
5340         }
5341
5342         /* After the ALIVE response, we can send host commands to 4965 uCode */
5343         set_bit(STATUS_ALIVE, &priv->status);
5344
5345         /* Clear out the uCode error bit if it is set */
5346         clear_bit(STATUS_FW_ERROR, &priv->status);
5347
5348         if (iwl_is_rfkill(priv))
5349                 return;
5350
5351         ieee80211_start_queues(priv->hw);
5352
5353         priv->active_rate = priv->rates_mask;
5354         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
5355
5356         iwl4965_send_power_mode(priv, IWL_POWER_LEVEL(priv->power_mode));
5357
5358         if (iwl_is_associated(priv)) {
5359                 struct iwl4965_rxon_cmd *active_rxon =
5360                                 (struct iwl4965_rxon_cmd *)(&priv->active_rxon);
5361
5362                 memcpy(&priv->staging_rxon, &priv->active_rxon,
5363                        sizeof(priv->staging_rxon));
5364                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
5365         } else {
5366                 /* Initialize our rx_config data */
5367                 iwl4965_connection_init_rx_config(priv);
5368                 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
5369         }
5370
5371         /* Configure Bluetooth device coexistence support */
5372         iwl4965_send_bt_config(priv);
5373
5374         /* Configure the adapter for unassociated operation */
5375         iwl4965_commit_rxon(priv);
5376
5377         /* At this point, the NIC is initialized and operational */
5378         priv->notif_missed_beacons = 0;
5379
5380         iwl4965_rf_kill_ct_config(priv);
5381
5382         iwl_leds_register(priv);
5383
5384         IWL_DEBUG_INFO("ALIVE processing complete.\n");
5385         set_bit(STATUS_READY, &priv->status);
5386         wake_up_interruptible(&priv->wait_command_queue);
5387
5388         if (priv->error_recovering)
5389                 iwl4965_error_recovery(priv);
5390
5391         iwlcore_low_level_notify(priv, IWLCORE_START_EVT);
5392         ieee80211_notify_mac(priv->hw, IEEE80211_NOTIFY_RE_ASSOC);
5393         return;
5394
5395  restart:
5396         queue_work(priv->workqueue, &priv->restart);
5397 }
5398
5399 static void iwl4965_cancel_deferred_work(struct iwl_priv *priv);
5400
5401 static void __iwl4965_down(struct iwl_priv *priv)
5402 {
5403         unsigned long flags;
5404         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
5405         struct ieee80211_conf *conf = NULL;
5406
5407         IWL_DEBUG_INFO(DRV_NAME " is going down\n");
5408
5409         conf = ieee80211_get_hw_conf(priv->hw);
5410
5411         if (!exit_pending)
5412                 set_bit(STATUS_EXIT_PENDING, &priv->status);
5413
5414         iwl_leds_unregister(priv);
5415
5416         iwlcore_low_level_notify(priv, IWLCORE_STOP_EVT);
5417
5418         iwlcore_clear_stations_table(priv);
5419
5420         /* Unblock any waiting calls */
5421         wake_up_interruptible_all(&priv->wait_command_queue);
5422
5423         /* Wipe out the EXIT_PENDING status bit if we are not actually
5424          * exiting the module */
5425         if (!exit_pending)
5426                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
5427
5428         /* stop and reset the on-board processor */
5429         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
5430
5431         /* tell the device to stop sending interrupts */
5432         spin_lock_irqsave(&priv->lock, flags);
5433         iwl4965_disable_interrupts(priv);
5434         spin_unlock_irqrestore(&priv->lock, flags);
5435         iwl_synchronize_irq(priv);
5436
5437         if (priv->mac80211_registered)
5438                 ieee80211_stop_queues(priv->hw);
5439
5440         /* If we have not previously called iwl4965_init() then
5441          * clear all bits but the RF Kill and SUSPEND bits and return */
5442         if (!iwl_is_init(priv)) {
5443                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
5444                                         STATUS_RF_KILL_HW |
5445                                test_bit(STATUS_RF_KILL_SW, &priv->status) <<
5446                                         STATUS_RF_KILL_SW |
5447                                test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
5448                                         STATUS_GEO_CONFIGURED |
5449                                test_bit(STATUS_IN_SUSPEND, &priv->status) <<
5450                                         STATUS_IN_SUSPEND;
5451                 goto exit;
5452         }
5453
5454         /* ...otherwise clear out all the status bits but the RF Kill and
5455          * SUSPEND bits and continue taking the NIC down. */
5456         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
5457                                 STATUS_RF_KILL_HW |
5458                         test_bit(STATUS_RF_KILL_SW, &priv->status) <<
5459                                 STATUS_RF_KILL_SW |
5460                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
5461                                 STATUS_GEO_CONFIGURED |
5462                         test_bit(STATUS_IN_SUSPEND, &priv->status) <<
5463                                 STATUS_IN_SUSPEND |
5464                         test_bit(STATUS_FW_ERROR, &priv->status) <<
5465                                 STATUS_FW_ERROR;
5466
5467         spin_lock_irqsave(&priv->lock, flags);
5468         iwl_clear_bit(priv, CSR_GP_CNTRL,
5469                          CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
5470         spin_unlock_irqrestore(&priv->lock, flags);
5471
5472         iwl4965_hw_txq_ctx_stop(priv);
5473         iwl4965_hw_rxq_stop(priv);
5474
5475         spin_lock_irqsave(&priv->lock, flags);
5476         if (!iwl_grab_nic_access(priv)) {
5477                 iwl_write_prph(priv, APMG_CLK_DIS_REG,
5478                                          APMG_CLK_VAL_DMA_CLK_RQT);
5479                 iwl_release_nic_access(priv);
5480         }
5481         spin_unlock_irqrestore(&priv->lock, flags);
5482
5483         udelay(5);
5484
5485         iwl4965_hw_nic_stop_master(priv);
5486         iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
5487         iwl4965_hw_nic_reset(priv);
5488
5489  exit:
5490         memset(&priv->card_alive, 0, sizeof(struct iwl4965_alive_resp));
5491
5492         if (priv->ibss_beacon)
5493                 dev_kfree_skb(priv->ibss_beacon);
5494         priv->ibss_beacon = NULL;
5495
5496         /* clear out any free frames */
5497         iwl4965_clear_free_frames(priv);
5498 }
5499
5500 static void iwl4965_down(struct iwl_priv *priv)
5501 {
5502         mutex_lock(&priv->mutex);
5503         __iwl4965_down(priv);
5504         mutex_unlock(&priv->mutex);
5505
5506         iwl4965_cancel_deferred_work(priv);
5507 }
5508
5509 #define MAX_HW_RESTARTS 5
5510
5511 static int __iwl4965_up(struct iwl_priv *priv)
5512 {
5513         int i;
5514         int ret;
5515
5516         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
5517                 IWL_WARNING("Exit pending; will not bring the NIC up\n");
5518                 return -EIO;
5519         }
5520
5521         if (test_bit(STATUS_RF_KILL_SW, &priv->status)) {
5522                 IWL_WARNING("Radio disabled by SW RF kill (module "
5523                             "parameter)\n");
5524                 iwl_rfkill_set_hw_state(priv);
5525                 return -ENODEV;
5526         }
5527
5528         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
5529                 IWL_ERROR("ucode not available for device bringup\n");
5530                 return -EIO;
5531         }
5532
5533         /* If platform's RF_KILL switch is NOT set to KILL */
5534         if (iwl_read32(priv, CSR_GP_CNTRL) &
5535                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
5536                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
5537         else {
5538                 set_bit(STATUS_RF_KILL_HW, &priv->status);
5539                 if (!test_bit(STATUS_IN_SUSPEND, &priv->status)) {
5540                         iwl_rfkill_set_hw_state(priv);
5541                         IWL_WARNING("Radio disabled by HW RF Kill switch\n");
5542                         return -ENODEV;
5543                 }
5544         }
5545
5546         iwl_rfkill_set_hw_state(priv);
5547         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
5548
5549         ret = priv->cfg->ops->lib->hw_nic_init(priv);
5550         if (ret) {
5551                 IWL_ERROR("Unable to init nic\n");
5552                 return ret;
5553         }
5554
5555         /* make sure rfkill handshake bits are cleared */
5556         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
5557         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
5558                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
5559
5560         /* clear (again), then enable host interrupts */
5561         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
5562         iwl4965_enable_interrupts(priv);
5563
5564         /* really make sure rfkill handshake bits are cleared */
5565         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
5566         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
5567
5568         /* Copy original ucode data image from disk into backup cache.
5569          * This will be used to initialize the on-board processor's
5570          * data SRAM for a clean start when the runtime program first loads. */
5571         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
5572                priv->ucode_data.len);
5573
5574         /* We return success when we resume from suspend and rf_kill is on. */
5575         if (test_bit(STATUS_RF_KILL_HW, &priv->status))
5576                 return 0;
5577
5578         for (i = 0; i < MAX_HW_RESTARTS; i++) {
5579
5580                 iwlcore_clear_stations_table(priv);
5581
5582                 /* load bootstrap state machine,
5583                  * load bootstrap program into processor's memory,
5584                  * prepare to load the "initialize" uCode */
5585                 ret = priv->cfg->ops->lib->load_ucode(priv);
5586
5587                 if (ret) {
5588                         IWL_ERROR("Unable to set up bootstrap uCode: %d\n", ret);
5589                         continue;
5590                 }
5591
5592                 /* start card; "initialize" will load runtime ucode */
5593                 iwl4965_nic_start(priv);
5594
5595                 IWL_DEBUG_INFO(DRV_NAME " is coming up\n");
5596
5597                 return 0;
5598         }
5599
5600         set_bit(STATUS_EXIT_PENDING, &priv->status);
5601         __iwl4965_down(priv);
5602
5603         /* tried to restart and config the device for as long as our
5604          * patience could withstand */
5605         IWL_ERROR("Unable to initialize device after %d attempts.\n", i);
5606         return -EIO;
5607 }
5608
5609
5610 /*****************************************************************************
5611  *
5612  * Workqueue callbacks
5613  *
5614  *****************************************************************************/
5615
5616 static void iwl4965_bg_init_alive_start(struct work_struct *data)
5617 {
5618         struct iwl_priv *priv =
5619             container_of(data, struct iwl_priv, init_alive_start.work);
5620
5621         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5622                 return;
5623
5624         mutex_lock(&priv->mutex);
5625         iwl4965_init_alive_start(priv);
5626         mutex_unlock(&priv->mutex);
5627 }
5628
5629 static void iwl4965_bg_alive_start(struct work_struct *data)
5630 {
5631         struct iwl_priv *priv =
5632             container_of(data, struct iwl_priv, alive_start.work);
5633
5634         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5635                 return;
5636
5637         mutex_lock(&priv->mutex);
5638         iwl4965_alive_start(priv);
5639         mutex_unlock(&priv->mutex);
5640 }
5641
5642 static void iwl4965_bg_rf_kill(struct work_struct *work)
5643 {
5644         struct iwl_priv *priv = container_of(work, struct iwl_priv, rf_kill);
5645
5646         wake_up_interruptible(&priv->wait_command_queue);
5647
5648         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5649                 return;
5650
5651         mutex_lock(&priv->mutex);
5652
5653         if (!iwl_is_rfkill(priv)) {
5654                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL,
5655                           "HW and/or SW RF Kill no longer active, restarting "
5656                           "device\n");
5657                 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
5658                         queue_work(priv->workqueue, &priv->restart);
5659         } else {
5660                 /* make sure mac80211 stop sending Tx frame */
5661                 if (priv->mac80211_registered)
5662                         ieee80211_stop_queues(priv->hw);
5663
5664                 if (!test_bit(STATUS_RF_KILL_HW, &priv->status))
5665                         IWL_DEBUG_RF_KILL("Can not turn radio back on - "
5666                                           "disabled by SW switch\n");
5667                 else
5668                         IWL_WARNING("Radio Frequency Kill Switch is On:\n"
5669                                     "Kill switch must be turned off for "
5670                                     "wireless networking to work.\n");
5671         }
5672         iwl_rfkill_set_hw_state(priv);
5673
5674         mutex_unlock(&priv->mutex);
5675 }
5676
5677 #define IWL_SCAN_CHECK_WATCHDOG (7 * HZ)
5678
5679 static void iwl4965_bg_scan_check(struct work_struct *data)
5680 {
5681         struct iwl_priv *priv =
5682             container_of(data, struct iwl_priv, scan_check.work);
5683
5684         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5685                 return;
5686
5687         mutex_lock(&priv->mutex);
5688         if (test_bit(STATUS_SCANNING, &priv->status) ||
5689             test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
5690                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN,
5691                           "Scan completion watchdog resetting adapter (%dms)\n",
5692                           jiffies_to_msecs(IWL_SCAN_CHECK_WATCHDOG));
5693
5694                 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
5695                         iwl4965_send_scan_abort(priv);
5696         }
5697         mutex_unlock(&priv->mutex);
5698 }
5699
5700 static void iwl4965_bg_request_scan(struct work_struct *data)
5701 {
5702         struct iwl_priv *priv =
5703             container_of(data, struct iwl_priv, request_scan);
5704         struct iwl_host_cmd cmd = {
5705                 .id = REPLY_SCAN_CMD,
5706                 .len = sizeof(struct iwl4965_scan_cmd),
5707                 .meta.flags = CMD_SIZE_HUGE,
5708         };
5709         struct iwl4965_scan_cmd *scan;
5710         struct ieee80211_conf *conf = NULL;
5711         u16 cmd_len;
5712         enum ieee80211_band band;
5713         u8 direct_mask;
5714         int ret = 0;
5715
5716         conf = ieee80211_get_hw_conf(priv->hw);
5717
5718         mutex_lock(&priv->mutex);
5719
5720         if (!iwl_is_ready(priv)) {
5721                 IWL_WARNING("request scan called when driver not ready.\n");
5722                 goto done;
5723         }
5724
5725         /* Make sure the scan wasn't cancelled before this queued work
5726          * was given the chance to run... */
5727         if (!test_bit(STATUS_SCANNING, &priv->status))
5728                 goto done;
5729
5730         /* This should never be called or scheduled if there is currently
5731          * a scan active in the hardware. */
5732         if (test_bit(STATUS_SCAN_HW, &priv->status)) {
5733                 IWL_DEBUG_INFO("Multiple concurrent scan requests in parallel. "
5734                                "Ignoring second request.\n");
5735                 ret = -EIO;
5736                 goto done;
5737         }
5738
5739         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
5740                 IWL_DEBUG_SCAN("Aborting scan due to device shutdown\n");
5741                 goto done;
5742         }
5743
5744         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
5745                 IWL_DEBUG_HC("Scan request while abort pending.  Queuing.\n");
5746                 goto done;
5747         }
5748
5749         if (iwl_is_rfkill(priv)) {
5750                 IWL_DEBUG_HC("Aborting scan due to RF Kill activation\n");
5751                 goto done;
5752         }
5753
5754         if (!test_bit(STATUS_READY, &priv->status)) {
5755                 IWL_DEBUG_HC("Scan request while uninitialized.  Queuing.\n");
5756                 goto done;
5757         }
5758
5759         if (!priv->scan_bands) {
5760                 IWL_DEBUG_HC("Aborting scan due to no requested bands\n");
5761                 goto done;
5762         }
5763
5764         if (!priv->scan) {
5765                 priv->scan = kmalloc(sizeof(struct iwl4965_scan_cmd) +
5766                                      IWL_MAX_SCAN_SIZE, GFP_KERNEL);
5767                 if (!priv->scan) {
5768                         ret = -ENOMEM;
5769                         goto done;
5770                 }
5771         }
5772         scan = priv->scan;
5773         memset(scan, 0, sizeof(struct iwl4965_scan_cmd) + IWL_MAX_SCAN_SIZE);
5774
5775         scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
5776         scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
5777
5778         if (iwl_is_associated(priv)) {
5779                 u16 interval = 0;
5780                 u32 extra;
5781                 u32 suspend_time = 100;
5782                 u32 scan_suspend_time = 100;
5783                 unsigned long flags;
5784
5785                 IWL_DEBUG_INFO("Scanning while associated...\n");
5786
5787                 spin_lock_irqsave(&priv->lock, flags);
5788                 interval = priv->beacon_int;
5789                 spin_unlock_irqrestore(&priv->lock, flags);
5790
5791                 scan->suspend_time = 0;
5792                 scan->max_out_time = cpu_to_le32(200 * 1024);
5793                 if (!interval)
5794                         interval = suspend_time;
5795
5796                 extra = (suspend_time / interval) << 22;
5797                 scan_suspend_time = (extra |
5798                     ((suspend_time % interval) * 1024));
5799                 scan->suspend_time = cpu_to_le32(scan_suspend_time);
5800                 IWL_DEBUG_SCAN("suspend_time 0x%X beacon interval %d\n",
5801                                scan_suspend_time, interval);
5802         }
5803
5804         /* We should add the ability for user to lock to PASSIVE ONLY */
5805         if (priv->one_direct_scan) {
5806                 IWL_DEBUG_SCAN
5807                     ("Kicking off one direct scan for '%s'\n",
5808                      iwl4965_escape_essid(priv->direct_ssid,
5809                                       priv->direct_ssid_len));
5810                 scan->direct_scan[0].id = WLAN_EID_SSID;
5811                 scan->direct_scan[0].len = priv->direct_ssid_len;
5812                 memcpy(scan->direct_scan[0].ssid,
5813                        priv->direct_ssid, priv->direct_ssid_len);
5814                 direct_mask = 1;
5815         } else if (!iwl_is_associated(priv) && priv->essid_len) {
5816                 IWL_DEBUG_SCAN
5817                   ("Kicking off one direct scan for '%s' when not associated\n",
5818                    iwl4965_escape_essid(priv->essid, priv->essid_len));
5819                 scan->direct_scan[0].id = WLAN_EID_SSID;
5820                 scan->direct_scan[0].len = priv->essid_len;
5821                 memcpy(scan->direct_scan[0].ssid, priv->essid, priv->essid_len);
5822                 direct_mask = 1;
5823         } else {
5824                 IWL_DEBUG_SCAN("Kicking off one indirect scan.\n");
5825                 direct_mask = 0;
5826         }
5827
5828         scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
5829         scan->tx_cmd.sta_id = priv->hw_params.bcast_sta_id;
5830         scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
5831
5832
5833         switch (priv->scan_bands) {
5834         case 2:
5835                 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
5836                 scan->tx_cmd.rate_n_flags =
5837                                 iwl4965_hw_set_rate_n_flags(IWL_RATE_1M_PLCP,
5838                                 RATE_MCS_ANT_B_MSK|RATE_MCS_CCK_MSK);
5839
5840                 scan->good_CRC_th = 0;
5841                 band = IEEE80211_BAND_2GHZ;
5842                 break;
5843
5844         case 1:
5845                 scan->tx_cmd.rate_n_flags =
5846                                 iwl4965_hw_set_rate_n_flags(IWL_RATE_6M_PLCP,
5847                                 RATE_MCS_ANT_B_MSK);
5848                 scan->good_CRC_th = IWL_GOOD_CRC_TH;
5849                 band = IEEE80211_BAND_5GHZ;
5850                 break;
5851
5852         default:
5853                 IWL_WARNING("Invalid scan band count\n");
5854                 goto done;
5855         }
5856
5857         /* We don't build a direct scan probe request; the uCode will do
5858          * that based on the direct_mask added to each channel entry */
5859         cmd_len = iwl4965_fill_probe_req(priv, band,
5860                                         (struct ieee80211_mgmt *)scan->data,
5861                                         IWL_MAX_SCAN_SIZE - sizeof(*scan), 0);
5862
5863         scan->tx_cmd.len = cpu_to_le16(cmd_len);
5864         /* select Rx chains */
5865
5866         /* Force use of chains B and C (0x6) for scan Rx.
5867          * Avoid A (0x1) because of its off-channel reception on A-band.
5868          * MIMO is not used here, but value is required to make uCode happy. */
5869         scan->rx_chain = RXON_RX_CHAIN_DRIVER_FORCE_MSK |
5870                         cpu_to_le16((0x7 << RXON_RX_CHAIN_VALID_POS) |
5871                         (0x6 << RXON_RX_CHAIN_FORCE_SEL_POS) |
5872                         (0x7 << RXON_RX_CHAIN_FORCE_MIMO_SEL_POS));
5873
5874         if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR)
5875                 scan->filter_flags = RXON_FILTER_PROMISC_MSK;
5876
5877         if (direct_mask)
5878                 scan->channel_count =
5879                         iwl4965_get_channels_for_scan(
5880                                 priv, band, 1, /* active */
5881                                 direct_mask,
5882                                 (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
5883         else
5884                 scan->channel_count =
5885                         iwl4965_get_channels_for_scan(
5886                                 priv, band, 0, /* passive */
5887                                 direct_mask,
5888                                 (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
5889
5890         cmd.len += le16_to_cpu(scan->tx_cmd.len) +
5891             scan->channel_count * sizeof(struct iwl4965_scan_channel);
5892         cmd.data = scan;
5893         scan->len = cpu_to_le16(cmd.len);
5894
5895         set_bit(STATUS_SCAN_HW, &priv->status);
5896         ret = iwl_send_cmd_sync(priv, &cmd);
5897         if (ret)
5898                 goto done;
5899
5900         queue_delayed_work(priv->workqueue, &priv->scan_check,
5901                            IWL_SCAN_CHECK_WATCHDOG);
5902
5903         mutex_unlock(&priv->mutex);
5904         return;
5905
5906  done:
5907         /* inform mac80211 scan aborted */
5908         queue_work(priv->workqueue, &priv->scan_completed);
5909         mutex_unlock(&priv->mutex);
5910 }
5911
5912 static void iwl4965_bg_up(struct work_struct *data)
5913 {
5914         struct iwl_priv *priv = container_of(data, struct iwl_priv, up);
5915
5916         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5917                 return;
5918
5919         mutex_lock(&priv->mutex);
5920         __iwl4965_up(priv);
5921         mutex_unlock(&priv->mutex);
5922 }
5923
5924 static void iwl4965_bg_restart(struct work_struct *data)
5925 {
5926         struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
5927
5928         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5929                 return;
5930
5931         iwl4965_down(priv);
5932         queue_work(priv->workqueue, &priv->up);
5933 }
5934
5935 static void iwl4965_bg_rx_replenish(struct work_struct *data)
5936 {
5937         struct iwl_priv *priv =
5938             container_of(data, struct iwl_priv, rx_replenish);
5939
5940         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5941                 return;
5942
5943         mutex_lock(&priv->mutex);
5944         iwl4965_rx_replenish(priv);
5945         mutex_unlock(&priv->mutex);
5946 }
5947
5948 #define IWL_DELAY_NEXT_SCAN (HZ*2)
5949
5950 static void iwl4965_post_associate(struct iwl_priv *priv)
5951 {
5952         struct ieee80211_conf *conf = NULL;
5953         int ret = 0;
5954         DECLARE_MAC_BUF(mac);
5955
5956         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
5957                 IWL_ERROR("%s Should not be called in AP mode\n", __FUNCTION__);
5958                 return;
5959         }
5960
5961         IWL_DEBUG_ASSOC("Associated as %d to: %s\n",
5962                         priv->assoc_id,
5963                         print_mac(mac, priv->active_rxon.bssid_addr));
5964
5965
5966         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5967                 return;
5968
5969
5970         if (!priv->vif || !priv->is_open)
5971                 return;
5972
5973         iwl4965_scan_cancel_timeout(priv, 200);
5974
5975         conf = ieee80211_get_hw_conf(priv->hw);
5976
5977         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
5978         iwl4965_commit_rxon(priv);
5979
5980         memset(&priv->rxon_timing, 0, sizeof(struct iwl4965_rxon_time_cmd));
5981         iwl4965_setup_rxon_timing(priv);
5982         ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
5983                               sizeof(priv->rxon_timing), &priv->rxon_timing);
5984         if (ret)
5985                 IWL_WARNING("REPLY_RXON_TIMING failed - "
5986                             "Attempting to continue.\n");
5987
5988         priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
5989
5990 #ifdef CONFIG_IWL4965_HT
5991         if (priv->current_ht_config.is_ht)
5992                 iwl4965_set_rxon_ht(priv, &priv->current_ht_config);
5993 #endif /* CONFIG_IWL4965_HT*/
5994         iwl4965_set_rxon_chain(priv);
5995         priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
5996
5997         IWL_DEBUG_ASSOC("assoc id %d beacon interval %d\n",
5998                         priv->assoc_id, priv->beacon_int);
5999
6000         if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
6001                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
6002         else
6003                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
6004
6005         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
6006                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
6007                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
6008                 else
6009                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
6010
6011                 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
6012                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
6013
6014         }
6015
6016         iwl4965_commit_rxon(priv);
6017
6018         switch (priv->iw_mode) {
6019         case IEEE80211_IF_TYPE_STA:
6020                 iwl4965_rate_scale_init(priv->hw, IWL_AP_ID);
6021                 break;
6022
6023         case IEEE80211_IF_TYPE_IBSS:
6024
6025                 /* clear out the station table */
6026                 iwlcore_clear_stations_table(priv);
6027
6028                 iwl4965_rxon_add_station(priv, iwl4965_broadcast_addr, 0);
6029                 iwl4965_rxon_add_station(priv, priv->bssid, 0);
6030                 iwl4965_rate_scale_init(priv->hw, IWL_STA_ID);
6031                 iwl4965_send_beacon_cmd(priv);
6032
6033                 break;
6034
6035         default:
6036                 IWL_ERROR("%s Should not be called in %d mode\n",
6037                                 __FUNCTION__, priv->iw_mode);
6038                 break;
6039         }
6040
6041         iwl4965_sequence_reset(priv);
6042
6043 #ifdef CONFIG_IWL4965_SENSITIVITY
6044         /* Enable Rx differential gain and sensitivity calibrations */
6045         iwl4965_chain_noise_reset(priv);
6046         priv->start_calib = 1;
6047 #endif /* CONFIG_IWL4965_SENSITIVITY */
6048
6049         if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
6050                 priv->assoc_station_added = 1;
6051
6052         iwl4965_activate_qos(priv, 0);
6053
6054         /* we have just associated, don't start scan too early */
6055         priv->next_scan_jiffies = jiffies + IWL_DELAY_NEXT_SCAN;
6056 }
6057
6058
6059 static void iwl4965_bg_post_associate(struct work_struct *data)
6060 {
6061         struct iwl_priv *priv = container_of(data, struct iwl_priv,
6062                                              post_associate.work);
6063
6064         mutex_lock(&priv->mutex);
6065         iwl4965_post_associate(priv);
6066         mutex_unlock(&priv->mutex);
6067
6068 }
6069
6070 static void iwl4965_bg_abort_scan(struct work_struct *work)
6071 {
6072         struct iwl_priv *priv = container_of(work, struct iwl_priv, abort_scan);
6073
6074         if (!iwl_is_ready(priv))
6075                 return;
6076
6077         mutex_lock(&priv->mutex);
6078
6079         set_bit(STATUS_SCAN_ABORTING, &priv->status);
6080         iwl4965_send_scan_abort(priv);
6081
6082         mutex_unlock(&priv->mutex);
6083 }
6084
6085 static int iwl4965_mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf);
6086
6087 static void iwl4965_bg_scan_completed(struct work_struct *work)
6088 {
6089         struct iwl_priv *priv =
6090             container_of(work, struct iwl_priv, scan_completed);
6091
6092         IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN, "SCAN complete scan\n");
6093
6094         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6095                 return;
6096
6097         if (test_bit(STATUS_CONF_PENDING, &priv->status))
6098                 iwl4965_mac_config(priv->hw, ieee80211_get_hw_conf(priv->hw));
6099
6100         ieee80211_scan_completed(priv->hw);
6101
6102         /* Since setting the TXPOWER may have been deferred while
6103          * performing the scan, fire one off */
6104         mutex_lock(&priv->mutex);
6105         iwl4965_hw_reg_send_txpower(priv);
6106         mutex_unlock(&priv->mutex);
6107 }
6108
6109 /*****************************************************************************
6110  *
6111  * mac80211 entry point functions
6112  *
6113  *****************************************************************************/
6114
6115 #define UCODE_READY_TIMEOUT     (2 * HZ)
6116
6117 static int iwl4965_mac_start(struct ieee80211_hw *hw)
6118 {
6119         struct iwl_priv *priv = hw->priv;
6120         int ret;
6121
6122         IWL_DEBUG_MAC80211("enter\n");
6123
6124         if (pci_enable_device(priv->pci_dev)) {
6125                 IWL_ERROR("Fail to pci_enable_device\n");
6126                 return -ENODEV;
6127         }
6128         pci_restore_state(priv->pci_dev);
6129         pci_enable_msi(priv->pci_dev);
6130
6131         ret = request_irq(priv->pci_dev->irq, iwl4965_isr, IRQF_SHARED,
6132                           DRV_NAME, priv);
6133         if (ret) {
6134                 IWL_ERROR("Error allocating IRQ %d\n", priv->pci_dev->irq);
6135                 goto out_disable_msi;
6136         }
6137
6138         /* we should be verifying the device is ready to be opened */
6139         mutex_lock(&priv->mutex);
6140
6141         memset(&priv->staging_rxon, 0, sizeof(struct iwl4965_rxon_cmd));
6142         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
6143          * ucode filename and max sizes are card-specific. */
6144
6145         if (!priv->ucode_code.len) {
6146                 ret = iwl4965_read_ucode(priv);
6147                 if (ret) {
6148                         IWL_ERROR("Could not read microcode: %d\n", ret);
6149                         mutex_unlock(&priv->mutex);
6150                         goto out_release_irq;
6151                 }
6152         }
6153
6154         ret = __iwl4965_up(priv);
6155
6156         mutex_unlock(&priv->mutex);
6157
6158         if (ret)
6159                 goto out_release_irq;
6160
6161         IWL_DEBUG_INFO("Start UP work done.\n");
6162
6163         if (test_bit(STATUS_IN_SUSPEND, &priv->status))
6164                 return 0;
6165
6166         /* Wait for START_ALIVE from ucode. Otherwise callbacks from
6167          * mac80211 will not be run successfully. */
6168         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
6169                         test_bit(STATUS_READY, &priv->status),
6170                         UCODE_READY_TIMEOUT);
6171         if (!ret) {
6172                 if (!test_bit(STATUS_READY, &priv->status)) {
6173                         IWL_ERROR("Wait for START_ALIVE timeout after %dms.\n",
6174                                   jiffies_to_msecs(UCODE_READY_TIMEOUT));
6175                         ret = -ETIMEDOUT;
6176                         goto out_release_irq;
6177                 }
6178         }
6179
6180         priv->is_open = 1;
6181         IWL_DEBUG_MAC80211("leave\n");
6182         return 0;
6183
6184 out_release_irq:
6185         free_irq(priv->pci_dev->irq, priv);
6186 out_disable_msi:
6187         pci_disable_msi(priv->pci_dev);
6188         pci_disable_device(priv->pci_dev);
6189         priv->is_open = 0;
6190         IWL_DEBUG_MAC80211("leave - failed\n");
6191         return ret;
6192 }
6193
6194 static void iwl4965_mac_stop(struct ieee80211_hw *hw)
6195 {
6196         struct iwl_priv *priv = hw->priv;
6197
6198         IWL_DEBUG_MAC80211("enter\n");
6199
6200         if (!priv->is_open) {
6201                 IWL_DEBUG_MAC80211("leave - skip\n");
6202                 return;
6203         }
6204
6205         priv->is_open = 0;
6206
6207         if (iwl_is_ready_rf(priv)) {
6208                 /* stop mac, cancel any scan request and clear
6209                  * RXON_FILTER_ASSOC_MSK BIT
6210                  */
6211                 mutex_lock(&priv->mutex);
6212                 iwl4965_scan_cancel_timeout(priv, 100);
6213                 cancel_delayed_work(&priv->post_associate);
6214                 mutex_unlock(&priv->mutex);
6215         }
6216
6217         iwl4965_down(priv);
6218
6219         flush_workqueue(priv->workqueue);
6220         free_irq(priv->pci_dev->irq, priv);
6221         pci_disable_msi(priv->pci_dev);
6222         pci_save_state(priv->pci_dev);
6223         pci_disable_device(priv->pci_dev);
6224
6225         IWL_DEBUG_MAC80211("leave\n");
6226 }
6227
6228 static int iwl4965_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb,
6229                       struct ieee80211_tx_control *ctl)
6230 {
6231         struct iwl_priv *priv = hw->priv;
6232
6233         IWL_DEBUG_MAC80211("enter\n");
6234
6235         if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR) {
6236                 IWL_DEBUG_MAC80211("leave - monitor\n");
6237                 return -1;
6238         }
6239
6240         IWL_DEBUG_TX("dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
6241                      ctl->tx_rate->bitrate);
6242
6243         if (iwl4965_tx_skb(priv, skb, ctl))
6244                 dev_kfree_skb_any(skb);
6245
6246         IWL_DEBUG_MAC80211("leave\n");
6247         return 0;
6248 }
6249
6250 static int iwl4965_mac_add_interface(struct ieee80211_hw *hw,
6251                                  struct ieee80211_if_init_conf *conf)
6252 {
6253         struct iwl_priv *priv = hw->priv;
6254         unsigned long flags;
6255         DECLARE_MAC_BUF(mac);
6256
6257         IWL_DEBUG_MAC80211("enter: type %d\n", conf->type);
6258
6259         if (priv->vif) {
6260                 IWL_DEBUG_MAC80211("leave - vif != NULL\n");
6261                 return -EOPNOTSUPP;
6262         }
6263
6264         spin_lock_irqsave(&priv->lock, flags);
6265         priv->vif = conf->vif;
6266
6267         spin_unlock_irqrestore(&priv->lock, flags);
6268
6269         mutex_lock(&priv->mutex);
6270
6271         if (conf->mac_addr) {
6272                 IWL_DEBUG_MAC80211("Set %s\n", print_mac(mac, conf->mac_addr));
6273                 memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN);
6274         }
6275
6276         if (iwl_is_ready(priv))
6277                 iwl4965_set_mode(priv, conf->type);
6278
6279         mutex_unlock(&priv->mutex);
6280
6281         IWL_DEBUG_MAC80211("leave\n");
6282         return 0;
6283 }
6284
6285 /**
6286  * iwl4965_mac_config - mac80211 config callback
6287  *
6288  * We ignore conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME since it seems to
6289  * be set inappropriately and the driver currently sets the hardware up to
6290  * use it whenever needed.
6291  */
6292 static int iwl4965_mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf)
6293 {
6294         struct iwl_priv *priv = hw->priv;
6295         const struct iwl_channel_info *ch_info;
6296         unsigned long flags;
6297         int ret = 0;
6298
6299         mutex_lock(&priv->mutex);
6300         IWL_DEBUG_MAC80211("enter to channel %d\n", conf->channel->hw_value);
6301
6302         priv->add_radiotap = !!(conf->flags & IEEE80211_CONF_RADIOTAP);
6303
6304         if (!iwl_is_ready(priv)) {
6305                 IWL_DEBUG_MAC80211("leave - not ready\n");
6306                 ret = -EIO;
6307                 goto out;
6308         }
6309
6310         if (unlikely(!priv->cfg->mod_params->disable_hw_scan &&
6311                      test_bit(STATUS_SCANNING, &priv->status))) {
6312                 IWL_DEBUG_MAC80211("leave - scanning\n");
6313                 set_bit(STATUS_CONF_PENDING, &priv->status);
6314                 mutex_unlock(&priv->mutex);
6315                 return 0;
6316         }
6317
6318         spin_lock_irqsave(&priv->lock, flags);
6319
6320         ch_info = iwl_get_channel_info(priv, conf->channel->band,
6321                         ieee80211_frequency_to_channel(conf->channel->center_freq));
6322         if (!is_channel_valid(ch_info)) {
6323                 IWL_DEBUG_MAC80211("leave - invalid channel\n");
6324                 spin_unlock_irqrestore(&priv->lock, flags);
6325                 ret = -EINVAL;
6326                 goto out;
6327         }
6328
6329 #ifdef CONFIG_IWL4965_HT
6330         /* if we are switching from ht to 2.4 clear flags
6331          * from any ht related info since 2.4 does not
6332          * support ht */
6333         if ((le16_to_cpu(priv->staging_rxon.channel) != conf->channel->hw_value)
6334 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
6335             && !(conf->flags & IEEE80211_CONF_CHANNEL_SWITCH)
6336 #endif
6337         )
6338                 priv->staging_rxon.flags = 0;
6339 #endif /* CONFIG_IWL4965_HT */
6340
6341         iwlcore_set_rxon_channel(priv, conf->channel->band,
6342                 ieee80211_frequency_to_channel(conf->channel->center_freq));
6343
6344         iwl4965_set_flags_for_phymode(priv, conf->channel->band);
6345
6346         /* The list of supported rates and rate mask can be different
6347          * for each band; since the band may have changed, reset
6348          * the rate mask to what mac80211 lists */
6349         iwl4965_set_rate(priv);
6350
6351         spin_unlock_irqrestore(&priv->lock, flags);
6352
6353 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
6354         if (conf->flags & IEEE80211_CONF_CHANNEL_SWITCH) {
6355                 iwl4965_hw_channel_switch(priv, conf->channel);
6356                 goto out;
6357         }
6358 #endif
6359
6360         if (priv->cfg->ops->lib->radio_kill_sw)
6361                 priv->cfg->ops->lib->radio_kill_sw(priv, !conf->radio_enabled);
6362
6363         if (!conf->radio_enabled) {
6364                 IWL_DEBUG_MAC80211("leave - radio disabled\n");
6365                 goto out;
6366         }
6367
6368         if (iwl_is_rfkill(priv)) {
6369                 IWL_DEBUG_MAC80211("leave - RF kill\n");
6370                 ret = -EIO;
6371                 goto out;
6372         }
6373
6374         iwl4965_set_rate(priv);
6375
6376         if (memcmp(&priv->active_rxon,
6377                    &priv->staging_rxon, sizeof(priv->staging_rxon)))
6378                 iwl4965_commit_rxon(priv);
6379         else
6380                 IWL_DEBUG_INFO("No re-sending same RXON configuration.\n");
6381
6382         IWL_DEBUG_MAC80211("leave\n");
6383
6384 out:
6385         clear_bit(STATUS_CONF_PENDING, &priv->status);
6386         mutex_unlock(&priv->mutex);
6387         return ret;
6388 }
6389
6390 static void iwl4965_config_ap(struct iwl_priv *priv)
6391 {
6392         int ret = 0;
6393
6394         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6395                 return;
6396
6397         /* The following should be done only at AP bring up */
6398         if ((priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) == 0) {
6399
6400                 /* RXON - unassoc (to set timing command) */
6401                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6402                 iwl4965_commit_rxon(priv);
6403
6404                 /* RXON Timing */
6405                 memset(&priv->rxon_timing, 0, sizeof(struct iwl4965_rxon_time_cmd));
6406                 iwl4965_setup_rxon_timing(priv);
6407                 ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
6408                                 sizeof(priv->rxon_timing), &priv->rxon_timing);
6409                 if (ret)
6410                         IWL_WARNING("REPLY_RXON_TIMING failed - "
6411                                         "Attempting to continue.\n");
6412
6413                 iwl4965_set_rxon_chain(priv);
6414
6415                 /* FIXME: what should be the assoc_id for AP? */
6416                 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
6417                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
6418                         priv->staging_rxon.flags |=
6419                                 RXON_FLG_SHORT_PREAMBLE_MSK;
6420                 else
6421                         priv->staging_rxon.flags &=
6422                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
6423
6424                 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
6425                         if (priv->assoc_capability &
6426                                 WLAN_CAPABILITY_SHORT_SLOT_TIME)
6427                                 priv->staging_rxon.flags |=
6428                                         RXON_FLG_SHORT_SLOT_MSK;
6429                         else
6430                                 priv->staging_rxon.flags &=
6431                                         ~RXON_FLG_SHORT_SLOT_MSK;
6432
6433                         if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
6434                                 priv->staging_rxon.flags &=
6435                                         ~RXON_FLG_SHORT_SLOT_MSK;
6436                 }
6437                 /* restore RXON assoc */
6438                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
6439                 iwl4965_commit_rxon(priv);
6440                 iwl4965_activate_qos(priv, 1);
6441                 iwl4965_rxon_add_station(priv, iwl4965_broadcast_addr, 0);
6442         }
6443         iwl4965_send_beacon_cmd(priv);
6444
6445         /* FIXME - we need to add code here to detect a totally new
6446          * configuration, reset the AP, unassoc, rxon timing, assoc,
6447          * clear sta table, add BCAST sta... */
6448 }
6449
6450 static int iwl4965_mac_config_interface(struct ieee80211_hw *hw,
6451                                         struct ieee80211_vif *vif,
6452                                     struct ieee80211_if_conf *conf)
6453 {
6454         struct iwl_priv *priv = hw->priv;
6455         DECLARE_MAC_BUF(mac);
6456         unsigned long flags;
6457         int rc;
6458
6459         if (conf == NULL)
6460                 return -EIO;
6461
6462         if (priv->vif != vif) {
6463                 IWL_DEBUG_MAC80211("leave - priv->vif != vif\n");
6464                 return 0;
6465         }
6466
6467         if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
6468             (!conf->beacon || !conf->ssid_len)) {
6469                 IWL_DEBUG_MAC80211
6470                     ("Leaving in AP mode because HostAPD is not ready.\n");
6471                 return 0;
6472         }
6473
6474         if (!iwl_is_alive(priv))
6475                 return -EAGAIN;
6476
6477         mutex_lock(&priv->mutex);
6478
6479         if (conf->bssid)
6480                 IWL_DEBUG_MAC80211("bssid: %s\n",
6481                                    print_mac(mac, conf->bssid));
6482
6483 /*
6484  * very dubious code was here; the probe filtering flag is never set:
6485  *
6486         if (unlikely(test_bit(STATUS_SCANNING, &priv->status)) &&
6487             !(priv->hw->flags & IEEE80211_HW_NO_PROBE_FILTERING)) {
6488  */
6489
6490         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
6491                 if (!conf->bssid) {
6492                         conf->bssid = priv->mac_addr;
6493                         memcpy(priv->bssid, priv->mac_addr, ETH_ALEN);
6494                         IWL_DEBUG_MAC80211("bssid was set to: %s\n",
6495                                            print_mac(mac, conf->bssid));
6496                 }
6497                 if (priv->ibss_beacon)
6498                         dev_kfree_skb(priv->ibss_beacon);
6499
6500                 priv->ibss_beacon = conf->beacon;
6501         }
6502
6503         if (iwl_is_rfkill(priv))
6504                 goto done;
6505
6506         if (conf->bssid && !is_zero_ether_addr(conf->bssid) &&
6507             !is_multicast_ether_addr(conf->bssid)) {
6508                 /* If there is currently a HW scan going on in the background
6509                  * then we need to cancel it else the RXON below will fail. */
6510                 if (iwl4965_scan_cancel_timeout(priv, 100)) {
6511                         IWL_WARNING("Aborted scan still in progress "
6512                                     "after 100ms\n");
6513                         IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
6514                         mutex_unlock(&priv->mutex);
6515                         return -EAGAIN;
6516                 }
6517                 memcpy(priv->staging_rxon.bssid_addr, conf->bssid, ETH_ALEN);
6518
6519                 /* TODO: Audit driver for usage of these members and see
6520                  * if mac80211 deprecates them (priv->bssid looks like it
6521                  * shouldn't be there, but I haven't scanned the IBSS code
6522                  * to verify) - jpk */
6523                 memcpy(priv->bssid, conf->bssid, ETH_ALEN);
6524
6525                 if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
6526                         iwl4965_config_ap(priv);
6527                 else {
6528                         rc = iwl4965_commit_rxon(priv);
6529                         if ((priv->iw_mode == IEEE80211_IF_TYPE_STA) && rc)
6530                                 iwl4965_rxon_add_station(
6531                                         priv, priv->active_rxon.bssid_addr, 1);
6532                 }
6533
6534         } else {
6535                 iwl4965_scan_cancel_timeout(priv, 100);
6536                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6537                 iwl4965_commit_rxon(priv);
6538         }
6539
6540  done:
6541         spin_lock_irqsave(&priv->lock, flags);
6542         if (!conf->ssid_len)
6543                 memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
6544         else
6545                 memcpy(priv->essid, conf->ssid, conf->ssid_len);
6546
6547         priv->essid_len = conf->ssid_len;
6548         spin_unlock_irqrestore(&priv->lock, flags);
6549
6550         IWL_DEBUG_MAC80211("leave\n");
6551         mutex_unlock(&priv->mutex);
6552
6553         return 0;
6554 }
6555
6556 static void iwl4965_configure_filter(struct ieee80211_hw *hw,
6557                                  unsigned int changed_flags,
6558                                  unsigned int *total_flags,
6559                                  int mc_count, struct dev_addr_list *mc_list)
6560 {
6561         /*
6562          * XXX: dummy
6563          * see also iwl4965_connection_init_rx_config
6564          */
6565         *total_flags = 0;
6566 }
6567
6568 static void iwl4965_mac_remove_interface(struct ieee80211_hw *hw,
6569                                      struct ieee80211_if_init_conf *conf)
6570 {
6571         struct iwl_priv *priv = hw->priv;
6572
6573         IWL_DEBUG_MAC80211("enter\n");
6574
6575         mutex_lock(&priv->mutex);
6576
6577         if (iwl_is_ready_rf(priv)) {
6578                 iwl4965_scan_cancel_timeout(priv, 100);
6579                 cancel_delayed_work(&priv->post_associate);
6580                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6581                 iwl4965_commit_rxon(priv);
6582         }
6583         if (priv->vif == conf->vif) {
6584                 priv->vif = NULL;
6585                 memset(priv->bssid, 0, ETH_ALEN);
6586                 memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
6587                 priv->essid_len = 0;
6588         }
6589         mutex_unlock(&priv->mutex);
6590
6591         IWL_DEBUG_MAC80211("leave\n");
6592
6593 }
6594
6595
6596 #ifdef CONFIG_IWL4965_HT
6597 static void iwl4965_ht_conf(struct iwl_priv *priv,
6598                             struct ieee80211_bss_conf *bss_conf)
6599 {
6600         struct ieee80211_ht_info *ht_conf = bss_conf->ht_conf;
6601         struct ieee80211_ht_bss_info *ht_bss_conf = bss_conf->ht_bss_conf;
6602         struct iwl_ht_info *iwl_conf = &priv->current_ht_config;
6603
6604         IWL_DEBUG_MAC80211("enter: \n");
6605
6606         iwl_conf->is_ht = bss_conf->assoc_ht;
6607
6608         if (!iwl_conf->is_ht)
6609                 return;
6610
6611         priv->ps_mode = (u8)((ht_conf->cap & IEEE80211_HT_CAP_MIMO_PS) >> 2);
6612
6613         if (ht_conf->cap & IEEE80211_HT_CAP_SGI_20)
6614                 iwl_conf->sgf |= 0x1;
6615         if (ht_conf->cap & IEEE80211_HT_CAP_SGI_40)
6616                 iwl_conf->sgf |= 0x2;
6617
6618         iwl_conf->is_green_field = !!(ht_conf->cap & IEEE80211_HT_CAP_GRN_FLD);
6619         iwl_conf->max_amsdu_size =
6620                 !!(ht_conf->cap & IEEE80211_HT_CAP_MAX_AMSDU);
6621
6622         iwl_conf->supported_chan_width =
6623                 !!(ht_conf->cap & IEEE80211_HT_CAP_SUP_WIDTH);
6624         iwl_conf->extension_chan_offset =
6625                 ht_bss_conf->bss_cap & IEEE80211_HT_IE_CHA_SEC_OFFSET;
6626         /* If no above or below channel supplied disable FAT channel */
6627         if (iwl_conf->extension_chan_offset != IWL_EXT_CHANNEL_OFFSET_ABOVE &&
6628             iwl_conf->extension_chan_offset != IWL_EXT_CHANNEL_OFFSET_BELOW)
6629                 iwl_conf->supported_chan_width = 0;
6630
6631         iwl_conf->tx_mimo_ps_mode =
6632                 (u8)((ht_conf->cap & IEEE80211_HT_CAP_MIMO_PS) >> 2);
6633         memcpy(iwl_conf->supp_mcs_set, ht_conf->supp_mcs_set, 16);
6634
6635         iwl_conf->control_channel = ht_bss_conf->primary_channel;
6636         iwl_conf->tx_chan_width =
6637                 !!(ht_bss_conf->bss_cap & IEEE80211_HT_IE_CHA_WIDTH);
6638         iwl_conf->ht_protection =
6639                 ht_bss_conf->bss_op_mode & IEEE80211_HT_IE_HT_PROTECTION;
6640         iwl_conf->non_GF_STA_present =
6641                 !!(ht_bss_conf->bss_op_mode & IEEE80211_HT_IE_NON_GF_STA_PRSNT);
6642
6643         IWL_DEBUG_MAC80211("control channel %d\n", iwl_conf->control_channel);
6644         IWL_DEBUG_MAC80211("leave\n");
6645 }
6646 #else
6647 static inline void iwl4965_ht_conf(struct iwl_priv *priv,
6648                                    struct ieee80211_bss_conf *bss_conf)
6649 {
6650 }
6651 #endif
6652
6653 #define IWL_DELAY_NEXT_SCAN_AFTER_ASSOC (HZ*6)
6654 static void iwl4965_bss_info_changed(struct ieee80211_hw *hw,
6655                                      struct ieee80211_vif *vif,
6656                                      struct ieee80211_bss_conf *bss_conf,
6657                                      u32 changes)
6658 {
6659         struct iwl_priv *priv = hw->priv;
6660
6661         IWL_DEBUG_MAC80211("changes = 0x%X\n", changes);
6662
6663         if (changes & BSS_CHANGED_ERP_PREAMBLE) {
6664                 IWL_DEBUG_MAC80211("ERP_PREAMBLE %d\n",
6665                                    bss_conf->use_short_preamble);
6666                 if (bss_conf->use_short_preamble)
6667                         priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
6668                 else
6669                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
6670         }
6671
6672         if (changes & BSS_CHANGED_ERP_CTS_PROT) {
6673                 IWL_DEBUG_MAC80211("ERP_CTS %d\n", bss_conf->use_cts_prot);
6674                 if (bss_conf->use_cts_prot && (priv->band != IEEE80211_BAND_5GHZ))
6675                         priv->staging_rxon.flags |= RXON_FLG_TGG_PROTECT_MSK;
6676                 else
6677                         priv->staging_rxon.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
6678         }
6679
6680         if (changes & BSS_CHANGED_HT) {
6681                 IWL_DEBUG_MAC80211("HT %d\n", bss_conf->assoc_ht);
6682                 iwl4965_ht_conf(priv, bss_conf);
6683                 iwl4965_set_rxon_chain(priv);
6684         }
6685
6686         if (changes & BSS_CHANGED_ASSOC) {
6687                 IWL_DEBUG_MAC80211("ASSOC %d\n", bss_conf->assoc);
6688                 /* This should never happen as this function should
6689                  * never be called from interrupt context. */
6690                 if (WARN_ON_ONCE(in_interrupt()))
6691                         return;
6692                 if (bss_conf->assoc) {
6693                         priv->assoc_id = bss_conf->aid;
6694                         priv->beacon_int = bss_conf->beacon_int;
6695                         priv->timestamp = bss_conf->timestamp;
6696                         priv->assoc_capability = bss_conf->assoc_capability;
6697                         priv->next_scan_jiffies = jiffies +
6698                                         IWL_DELAY_NEXT_SCAN_AFTER_ASSOC;
6699                         mutex_lock(&priv->mutex);
6700                         iwl4965_post_associate(priv);
6701                         mutex_unlock(&priv->mutex);
6702                 } else {
6703                         priv->assoc_id = 0;
6704                         IWL_DEBUG_MAC80211("DISASSOC %d\n", bss_conf->assoc);
6705                 }
6706         } else if (changes && iwl_is_associated(priv) && priv->assoc_id) {
6707                         IWL_DEBUG_MAC80211("Associated Changes %d\n", changes);
6708                         iwl_send_rxon_assoc(priv);
6709         }
6710
6711 }
6712
6713 static int iwl4965_mac_hw_scan(struct ieee80211_hw *hw, u8 *ssid, size_t len)
6714 {
6715         int rc = 0;
6716         unsigned long flags;
6717         struct iwl_priv *priv = hw->priv;
6718
6719         IWL_DEBUG_MAC80211("enter\n");
6720
6721         mutex_lock(&priv->mutex);
6722         spin_lock_irqsave(&priv->lock, flags);
6723
6724         if (!iwl_is_ready_rf(priv)) {
6725                 rc = -EIO;
6726                 IWL_DEBUG_MAC80211("leave - not ready or exit pending\n");
6727                 goto out_unlock;
6728         }
6729
6730         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {    /* APs don't scan */
6731                 rc = -EIO;
6732                 IWL_ERROR("ERROR: APs don't scan\n");
6733                 goto out_unlock;
6734         }
6735
6736         /* we don't schedule scan within next_scan_jiffies period */
6737         if (priv->next_scan_jiffies &&
6738                         time_after(priv->next_scan_jiffies, jiffies)) {
6739                 rc = -EAGAIN;
6740                 goto out_unlock;
6741         }
6742         /* if we just finished scan ask for delay */
6743         if (priv->last_scan_jiffies && time_after(priv->last_scan_jiffies +
6744                                 IWL_DELAY_NEXT_SCAN, jiffies)) {
6745                 rc = -EAGAIN;
6746                 goto out_unlock;
6747         }
6748         if (len) {
6749                 IWL_DEBUG_SCAN("direct scan for %s [%d]\n ",
6750                                iwl4965_escape_essid(ssid, len), (int)len);
6751
6752                 priv->one_direct_scan = 1;
6753                 priv->direct_ssid_len = (u8)
6754                     min((u8) len, (u8) IW_ESSID_MAX_SIZE);
6755                 memcpy(priv->direct_ssid, ssid, priv->direct_ssid_len);
6756         } else
6757                 priv->one_direct_scan = 0;
6758
6759         rc = iwl4965_scan_initiate(priv);
6760
6761         IWL_DEBUG_MAC80211("leave\n");
6762
6763 out_unlock:
6764         spin_unlock_irqrestore(&priv->lock, flags);
6765         mutex_unlock(&priv->mutex);
6766
6767         return rc;
6768 }
6769
6770 static void iwl4965_mac_update_tkip_key(struct ieee80211_hw *hw,
6771                         struct ieee80211_key_conf *keyconf, const u8 *addr,
6772                         u32 iv32, u16 *phase1key)
6773 {
6774         struct iwl_priv *priv = hw->priv;
6775         u8 sta_id = IWL_INVALID_STATION;
6776         unsigned long flags;
6777         __le16 key_flags = 0;
6778         int i;
6779         DECLARE_MAC_BUF(mac);
6780
6781         IWL_DEBUG_MAC80211("enter\n");
6782
6783         sta_id = iwl4965_hw_find_station(priv, addr);
6784         if (sta_id == IWL_INVALID_STATION) {
6785                 IWL_DEBUG_MAC80211("leave - %s not in station map.\n",
6786                                    print_mac(mac, addr));
6787                 return;
6788         }
6789
6790         iwl4965_scan_cancel_timeout(priv, 100);
6791
6792         key_flags |= (STA_KEY_FLG_TKIP | STA_KEY_FLG_MAP_KEY_MSK);
6793         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
6794         key_flags &= ~STA_KEY_FLG_INVALID;
6795
6796         if (sta_id == priv->hw_params.bcast_sta_id)
6797                 key_flags |= STA_KEY_MULTICAST_MSK;
6798
6799         spin_lock_irqsave(&priv->sta_lock, flags);
6800
6801         priv->stations[sta_id].sta.key.key_flags = key_flags;
6802         priv->stations[sta_id].sta.key.tkip_rx_tsc_byte2 = (u8) iv32;
6803
6804         for (i = 0; i < 5; i++)
6805                 priv->stations[sta_id].sta.key.tkip_rx_ttak[i] =
6806                         cpu_to_le16(phase1key[i]);
6807
6808         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
6809         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
6810
6811         iwl4965_send_add_station(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
6812
6813         spin_unlock_irqrestore(&priv->sta_lock, flags);
6814
6815         IWL_DEBUG_MAC80211("leave\n");
6816 }
6817
6818 static int iwl4965_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
6819                            const u8 *local_addr, const u8 *addr,
6820                            struct ieee80211_key_conf *key)
6821 {
6822         struct iwl_priv *priv = hw->priv;
6823         DECLARE_MAC_BUF(mac);
6824         int ret = 0;
6825         u8 sta_id = IWL_INVALID_STATION;
6826         u8 is_default_wep_key = 0;
6827
6828         IWL_DEBUG_MAC80211("enter\n");
6829
6830         if (priv->cfg->mod_params->sw_crypto) {
6831                 IWL_DEBUG_MAC80211("leave - hwcrypto disabled\n");
6832                 return -EOPNOTSUPP;
6833         }
6834
6835         if (is_zero_ether_addr(addr))
6836                 /* only support pairwise keys */
6837                 return -EOPNOTSUPP;
6838
6839         sta_id = iwl4965_hw_find_station(priv, addr);
6840         if (sta_id == IWL_INVALID_STATION) {
6841                 IWL_DEBUG_MAC80211("leave - %s not in station map.\n",
6842                                    print_mac(mac, addr));
6843                 return -EINVAL;
6844
6845         }
6846
6847         mutex_lock(&priv->mutex);
6848         iwl4965_scan_cancel_timeout(priv, 100);
6849         mutex_unlock(&priv->mutex);
6850
6851         /* If we are getting WEP group key and we didn't receive any key mapping
6852          * so far, we are in legacy wep mode (group key only), otherwise we are
6853          * in 1X mode.
6854          * In legacy wep mode, we use another host command to the uCode */
6855         if (key->alg == ALG_WEP && sta_id == priv->hw_params.bcast_sta_id &&
6856                 priv->iw_mode != IEEE80211_IF_TYPE_AP) {
6857                 if (cmd == SET_KEY)
6858                         is_default_wep_key = !priv->key_mapping_key;
6859                 else
6860                         is_default_wep_key = priv->default_wep_key;
6861         }
6862
6863         switch (cmd) {
6864         case SET_KEY:
6865                 if (is_default_wep_key)
6866                         ret = iwl_set_default_wep_key(priv, key);
6867                 else
6868                         ret = iwl_set_dynamic_key(priv, key, sta_id);
6869
6870                 IWL_DEBUG_MAC80211("enable hwcrypto key\n");
6871                 break;
6872         case DISABLE_KEY:
6873                 if (is_default_wep_key)
6874                         ret = iwl_remove_default_wep_key(priv, key);
6875                 else
6876                         ret = iwl_remove_dynamic_key(priv, sta_id);
6877
6878                 IWL_DEBUG_MAC80211("disable hwcrypto key\n");
6879                 break;
6880         default:
6881                 ret = -EINVAL;
6882         }
6883
6884         IWL_DEBUG_MAC80211("leave\n");
6885
6886         return ret;
6887 }
6888
6889 static int iwl4965_mac_conf_tx(struct ieee80211_hw *hw, int queue,
6890                            const struct ieee80211_tx_queue_params *params)
6891 {
6892         struct iwl_priv *priv = hw->priv;
6893         unsigned long flags;
6894         int q;
6895
6896         IWL_DEBUG_MAC80211("enter\n");
6897
6898         if (!iwl_is_ready_rf(priv)) {
6899                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
6900                 return -EIO;
6901         }
6902
6903         if (queue >= AC_NUM) {
6904                 IWL_DEBUG_MAC80211("leave - queue >= AC_NUM %d\n", queue);
6905                 return 0;
6906         }
6907
6908         if (!priv->qos_data.qos_enable) {
6909                 priv->qos_data.qos_active = 0;
6910                 IWL_DEBUG_MAC80211("leave - qos not enabled\n");
6911                 return 0;
6912         }
6913         q = AC_NUM - 1 - queue;
6914
6915         spin_lock_irqsave(&priv->lock, flags);
6916
6917         priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min);
6918         priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max);
6919         priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
6920         priv->qos_data.def_qos_parm.ac[q].edca_txop =
6921                         cpu_to_le16((params->txop * 32));
6922
6923         priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
6924         priv->qos_data.qos_active = 1;
6925
6926         spin_unlock_irqrestore(&priv->lock, flags);
6927
6928         mutex_lock(&priv->mutex);
6929         if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
6930                 iwl4965_activate_qos(priv, 1);
6931         else if (priv->assoc_id && iwl_is_associated(priv))
6932                 iwl4965_activate_qos(priv, 0);
6933
6934         mutex_unlock(&priv->mutex);
6935
6936         IWL_DEBUG_MAC80211("leave\n");
6937         return 0;
6938 }
6939
6940 static int iwl4965_mac_get_tx_stats(struct ieee80211_hw *hw,
6941                                 struct ieee80211_tx_queue_stats *stats)
6942 {
6943         struct iwl_priv *priv = hw->priv;
6944         int i, avail;
6945         struct iwl4965_tx_queue *txq;
6946         struct iwl4965_queue *q;
6947         unsigned long flags;
6948
6949         IWL_DEBUG_MAC80211("enter\n");
6950
6951         if (!iwl_is_ready_rf(priv)) {
6952                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
6953                 return -EIO;
6954         }
6955
6956         spin_lock_irqsave(&priv->lock, flags);
6957
6958         for (i = 0; i < AC_NUM; i++) {
6959                 txq = &priv->txq[i];
6960                 q = &txq->q;
6961                 avail = iwl4965_queue_space(q);
6962
6963                 stats->data[i].len = q->n_window - avail;
6964                 stats->data[i].limit = q->n_window - q->high_mark;
6965                 stats->data[i].count = q->n_window;
6966
6967         }
6968         spin_unlock_irqrestore(&priv->lock, flags);
6969
6970         IWL_DEBUG_MAC80211("leave\n");
6971
6972         return 0;
6973 }
6974
6975 static int iwl4965_mac_get_stats(struct ieee80211_hw *hw,
6976                              struct ieee80211_low_level_stats *stats)
6977 {
6978         IWL_DEBUG_MAC80211("enter\n");
6979         IWL_DEBUG_MAC80211("leave\n");
6980
6981         return 0;
6982 }
6983
6984 static u64 iwl4965_mac_get_tsf(struct ieee80211_hw *hw)
6985 {
6986         IWL_DEBUG_MAC80211("enter\n");
6987         IWL_DEBUG_MAC80211("leave\n");
6988
6989         return 0;
6990 }
6991
6992 static void iwl4965_mac_reset_tsf(struct ieee80211_hw *hw)
6993 {
6994         struct iwl_priv *priv = hw->priv;
6995         unsigned long flags;
6996
6997         mutex_lock(&priv->mutex);
6998         IWL_DEBUG_MAC80211("enter\n");
6999
7000         priv->lq_mngr.lq_ready = 0;
7001 #ifdef CONFIG_IWL4965_HT
7002         spin_lock_irqsave(&priv->lock, flags);
7003         memset(&priv->current_ht_config, 0, sizeof(struct iwl_ht_info));
7004         spin_unlock_irqrestore(&priv->lock, flags);
7005 #endif /* CONFIG_IWL4965_HT */
7006
7007         iwlcore_reset_qos(priv);
7008
7009         cancel_delayed_work(&priv->post_associate);
7010
7011         spin_lock_irqsave(&priv->lock, flags);
7012         priv->assoc_id = 0;
7013         priv->assoc_capability = 0;
7014         priv->assoc_station_added = 0;
7015
7016         /* new association get rid of ibss beacon skb */
7017         if (priv->ibss_beacon)
7018                 dev_kfree_skb(priv->ibss_beacon);
7019
7020         priv->ibss_beacon = NULL;
7021
7022         priv->beacon_int = priv->hw->conf.beacon_int;
7023         priv->timestamp = 0;
7024         if ((priv->iw_mode == IEEE80211_IF_TYPE_STA))
7025                 priv->beacon_int = 0;
7026
7027         spin_unlock_irqrestore(&priv->lock, flags);
7028
7029         if (!iwl_is_ready_rf(priv)) {
7030                 IWL_DEBUG_MAC80211("leave - not ready\n");
7031                 mutex_unlock(&priv->mutex);
7032                 return;
7033         }
7034
7035         /* we are restarting association process
7036          * clear RXON_FILTER_ASSOC_MSK bit
7037          */
7038         if (priv->iw_mode != IEEE80211_IF_TYPE_AP) {
7039                 iwl4965_scan_cancel_timeout(priv, 100);
7040                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7041                 iwl4965_commit_rxon(priv);
7042         }
7043
7044         /* Per mac80211.h: This is only used in IBSS mode... */
7045         if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
7046
7047                 IWL_DEBUG_MAC80211("leave - not in IBSS\n");
7048                 mutex_unlock(&priv->mutex);
7049                 return;
7050         }
7051
7052         iwl4965_set_rate(priv);
7053
7054         mutex_unlock(&priv->mutex);
7055
7056         IWL_DEBUG_MAC80211("leave\n");
7057 }
7058
7059 static int iwl4965_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb,
7060                                  struct ieee80211_tx_control *control)
7061 {
7062         struct iwl_priv *priv = hw->priv;
7063         unsigned long flags;
7064
7065         mutex_lock(&priv->mutex);
7066         IWL_DEBUG_MAC80211("enter\n");
7067
7068         if (!iwl_is_ready_rf(priv)) {
7069                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7070                 mutex_unlock(&priv->mutex);
7071                 return -EIO;
7072         }
7073
7074         if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
7075                 IWL_DEBUG_MAC80211("leave - not IBSS\n");
7076                 mutex_unlock(&priv->mutex);
7077                 return -EIO;
7078         }
7079
7080         spin_lock_irqsave(&priv->lock, flags);
7081
7082         if (priv->ibss_beacon)
7083                 dev_kfree_skb(priv->ibss_beacon);
7084
7085         priv->ibss_beacon = skb;
7086
7087         priv->assoc_id = 0;
7088
7089         IWL_DEBUG_MAC80211("leave\n");
7090         spin_unlock_irqrestore(&priv->lock, flags);
7091
7092         iwlcore_reset_qos(priv);
7093
7094         queue_work(priv->workqueue, &priv->post_associate.work);
7095
7096         mutex_unlock(&priv->mutex);
7097
7098         return 0;
7099 }
7100
7101 /*****************************************************************************
7102  *
7103  * sysfs attributes
7104  *
7105  *****************************************************************************/
7106
7107 #ifdef CONFIG_IWLWIFI_DEBUG
7108
7109 /*
7110  * The following adds a new attribute to the sysfs representation
7111  * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
7112  * used for controlling the debug level.
7113  *
7114  * See the level definitions in iwl for details.
7115  */
7116
7117 static ssize_t show_debug_level(struct device_driver *d, char *buf)
7118 {
7119         return sprintf(buf, "0x%08X\n", iwl_debug_level);
7120 }
7121 static ssize_t store_debug_level(struct device_driver *d,
7122                                  const char *buf, size_t count)
7123 {
7124         char *p = (char *)buf;
7125         u32 val;
7126
7127         val = simple_strtoul(p, &p, 0);
7128         if (p == buf)
7129                 printk(KERN_INFO DRV_NAME
7130                        ": %s is not in hex or decimal form.\n", buf);
7131         else
7132                 iwl_debug_level = val;
7133
7134         return strnlen(buf, count);
7135 }
7136
7137 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
7138                    show_debug_level, store_debug_level);
7139
7140 #endif /* CONFIG_IWLWIFI_DEBUG */
7141
7142
7143 static ssize_t show_temperature(struct device *d,
7144                                 struct device_attribute *attr, char *buf)
7145 {
7146         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7147
7148         if (!iwl_is_alive(priv))
7149                 return -EAGAIN;
7150
7151         return sprintf(buf, "%d\n", iwl4965_hw_get_temperature(priv));
7152 }
7153
7154 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
7155
7156 static ssize_t show_rs_window(struct device *d,
7157                               struct device_attribute *attr,
7158                               char *buf)
7159 {
7160         struct iwl_priv *priv = d->driver_data;
7161         return iwl4965_fill_rs_info(priv->hw, buf, IWL_AP_ID);
7162 }
7163 static DEVICE_ATTR(rs_window, S_IRUGO, show_rs_window, NULL);
7164
7165 static ssize_t show_tx_power(struct device *d,
7166                              struct device_attribute *attr, char *buf)
7167 {
7168         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7169         return sprintf(buf, "%d\n", priv->user_txpower_limit);
7170 }
7171
7172 static ssize_t store_tx_power(struct device *d,
7173                               struct device_attribute *attr,
7174                               const char *buf, size_t count)
7175 {
7176         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7177         char *p = (char *)buf;
7178         u32 val;
7179
7180         val = simple_strtoul(p, &p, 10);
7181         if (p == buf)
7182                 printk(KERN_INFO DRV_NAME
7183                        ": %s is not in decimal form.\n", buf);
7184         else
7185                 iwl4965_hw_reg_set_txpower(priv, val);
7186
7187         return count;
7188 }
7189
7190 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
7191
7192 static ssize_t show_flags(struct device *d,
7193                           struct device_attribute *attr, char *buf)
7194 {
7195         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7196
7197         return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
7198 }
7199
7200 static ssize_t store_flags(struct device *d,
7201                            struct device_attribute *attr,
7202                            const char *buf, size_t count)
7203 {
7204         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7205         u32 flags = simple_strtoul(buf, NULL, 0);
7206
7207         mutex_lock(&priv->mutex);
7208         if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
7209                 /* Cancel any currently running scans... */
7210                 if (iwl4965_scan_cancel_timeout(priv, 100))
7211                         IWL_WARNING("Could not cancel scan.\n");
7212                 else {
7213                         IWL_DEBUG_INFO("Committing rxon.flags = 0x%04X\n",
7214                                        flags);
7215                         priv->staging_rxon.flags = cpu_to_le32(flags);
7216                         iwl4965_commit_rxon(priv);
7217                 }
7218         }
7219         mutex_unlock(&priv->mutex);
7220
7221         return count;
7222 }
7223
7224 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
7225
7226 static ssize_t show_filter_flags(struct device *d,
7227                                  struct device_attribute *attr, char *buf)
7228 {
7229         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7230
7231         return sprintf(buf, "0x%04X\n",
7232                 le32_to_cpu(priv->active_rxon.filter_flags));
7233 }
7234
7235 static ssize_t store_filter_flags(struct device *d,
7236                                   struct device_attribute *attr,
7237                                   const char *buf, size_t count)
7238 {
7239         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7240         u32 filter_flags = simple_strtoul(buf, NULL, 0);
7241
7242         mutex_lock(&priv->mutex);
7243         if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
7244                 /* Cancel any currently running scans... */
7245                 if (iwl4965_scan_cancel_timeout(priv, 100))
7246                         IWL_WARNING("Could not cancel scan.\n");
7247                 else {
7248                         IWL_DEBUG_INFO("Committing rxon.filter_flags = "
7249                                        "0x%04X\n", filter_flags);
7250                         priv->staging_rxon.filter_flags =
7251                                 cpu_to_le32(filter_flags);
7252                         iwl4965_commit_rxon(priv);
7253                 }
7254         }
7255         mutex_unlock(&priv->mutex);
7256
7257         return count;
7258 }
7259
7260 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
7261                    store_filter_flags);
7262
7263 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
7264
7265 static ssize_t show_measurement(struct device *d,
7266                                 struct device_attribute *attr, char *buf)
7267 {
7268         struct iwl_priv *priv = dev_get_drvdata(d);
7269         struct iwl4965_spectrum_notification measure_report;
7270         u32 size = sizeof(measure_report), len = 0, ofs = 0;
7271         u8 *data = (u8 *) & measure_report;
7272         unsigned long flags;
7273
7274         spin_lock_irqsave(&priv->lock, flags);
7275         if (!(priv->measurement_status & MEASUREMENT_READY)) {
7276                 spin_unlock_irqrestore(&priv->lock, flags);
7277                 return 0;
7278         }
7279         memcpy(&measure_report, &priv->measure_report, size);
7280         priv->measurement_status = 0;
7281         spin_unlock_irqrestore(&priv->lock, flags);
7282
7283         while (size && (PAGE_SIZE - len)) {
7284                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
7285                                    PAGE_SIZE - len, 1);
7286                 len = strlen(buf);
7287                 if (PAGE_SIZE - len)
7288                         buf[len++] = '\n';
7289
7290                 ofs += 16;
7291                 size -= min(size, 16U);
7292         }
7293
7294         return len;
7295 }
7296
7297 static ssize_t store_measurement(struct device *d,
7298                                  struct device_attribute *attr,
7299                                  const char *buf, size_t count)
7300 {
7301         struct iwl_priv *priv = dev_get_drvdata(d);
7302         struct ieee80211_measurement_params params = {
7303                 .channel = le16_to_cpu(priv->active_rxon.channel),
7304                 .start_time = cpu_to_le64(priv->last_tsf),
7305                 .duration = cpu_to_le16(1),
7306         };
7307         u8 type = IWL_MEASURE_BASIC;
7308         u8 buffer[32];
7309         u8 channel;
7310
7311         if (count) {
7312                 char *p = buffer;
7313                 strncpy(buffer, buf, min(sizeof(buffer), count));
7314                 channel = simple_strtoul(p, NULL, 0);
7315                 if (channel)
7316                         params.channel = channel;
7317
7318                 p = buffer;
7319                 while (*p && *p != ' ')
7320                         p++;
7321                 if (*p)
7322                         type = simple_strtoul(p + 1, NULL, 0);
7323         }
7324
7325         IWL_DEBUG_INFO("Invoking measurement of type %d on "
7326                        "channel %d (for '%s')\n", type, params.channel, buf);
7327         iwl4965_get_measurement(priv, &params, type);
7328
7329         return count;
7330 }
7331
7332 static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
7333                    show_measurement, store_measurement);
7334 #endif /* CONFIG_IWL4965_SPECTRUM_MEASUREMENT */
7335
7336 static ssize_t store_retry_rate(struct device *d,
7337                                 struct device_attribute *attr,
7338                                 const char *buf, size_t count)
7339 {
7340         struct iwl_priv *priv = dev_get_drvdata(d);
7341
7342         priv->retry_rate = simple_strtoul(buf, NULL, 0);
7343         if (priv->retry_rate <= 0)
7344                 priv->retry_rate = 1;
7345
7346         return count;
7347 }
7348
7349 static ssize_t show_retry_rate(struct device *d,
7350                                struct device_attribute *attr, char *buf)
7351 {
7352         struct iwl_priv *priv = dev_get_drvdata(d);
7353         return sprintf(buf, "%d", priv->retry_rate);
7354 }
7355
7356 static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, show_retry_rate,
7357                    store_retry_rate);
7358
7359 static ssize_t store_power_level(struct device *d,
7360                                  struct device_attribute *attr,
7361                                  const char *buf, size_t count)
7362 {
7363         struct iwl_priv *priv = dev_get_drvdata(d);
7364         int rc;
7365         int mode;
7366
7367         mode = simple_strtoul(buf, NULL, 0);
7368         mutex_lock(&priv->mutex);
7369
7370         if (!iwl_is_ready(priv)) {
7371                 rc = -EAGAIN;
7372                 goto out;
7373         }
7374
7375         if ((mode < 1) || (mode > IWL_POWER_LIMIT) || (mode == IWL_POWER_AC))
7376                 mode = IWL_POWER_AC;
7377         else
7378                 mode |= IWL_POWER_ENABLED;
7379
7380         if (mode != priv->power_mode) {
7381                 rc = iwl4965_send_power_mode(priv, IWL_POWER_LEVEL(mode));
7382                 if (rc) {
7383                         IWL_DEBUG_MAC80211("failed setting power mode.\n");
7384                         goto out;
7385                 }
7386                 priv->power_mode = mode;
7387         }
7388
7389         rc = count;
7390
7391  out:
7392         mutex_unlock(&priv->mutex);
7393         return rc;
7394 }
7395
7396 #define MAX_WX_STRING 80
7397
7398 /* Values are in microsecond */
7399 static const s32 timeout_duration[] = {
7400         350000,
7401         250000,
7402         75000,
7403         37000,
7404         25000,
7405 };
7406 static const s32 period_duration[] = {
7407         400000,
7408         700000,
7409         1000000,
7410         1000000,
7411         1000000
7412 };
7413
7414 static ssize_t show_power_level(struct device *d,
7415                                 struct device_attribute *attr, char *buf)
7416 {
7417         struct iwl_priv *priv = dev_get_drvdata(d);
7418         int level = IWL_POWER_LEVEL(priv->power_mode);
7419         char *p = buf;
7420
7421         p += sprintf(p, "%d ", level);
7422         switch (level) {
7423         case IWL_POWER_MODE_CAM:
7424         case IWL_POWER_AC:
7425                 p += sprintf(p, "(AC)");
7426                 break;
7427         case IWL_POWER_BATTERY:
7428                 p += sprintf(p, "(BATTERY)");
7429                 break;
7430         default:
7431                 p += sprintf(p,
7432                              "(Timeout %dms, Period %dms)",
7433                              timeout_duration[level - 1] / 1000,
7434                              period_duration[level - 1] / 1000);
7435         }
7436
7437         if (!(priv->power_mode & IWL_POWER_ENABLED))
7438                 p += sprintf(p, " OFF\n");
7439         else
7440                 p += sprintf(p, " \n");
7441
7442         return (p - buf + 1);
7443
7444 }
7445
7446 static DEVICE_ATTR(power_level, S_IWUSR | S_IRUSR, show_power_level,
7447                    store_power_level);
7448
7449 static ssize_t show_channels(struct device *d,
7450                              struct device_attribute *attr, char *buf)
7451 {
7452         /* all this shit doesn't belong into sysfs anyway */
7453         return 0;
7454 }
7455
7456 static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL);
7457
7458 static ssize_t show_statistics(struct device *d,
7459                                struct device_attribute *attr, char *buf)
7460 {
7461         struct iwl_priv *priv = dev_get_drvdata(d);
7462         u32 size = sizeof(struct iwl4965_notif_statistics);
7463         u32 len = 0, ofs = 0;
7464         u8 *data = (u8 *) & priv->statistics;
7465         int rc = 0;
7466
7467         if (!iwl_is_alive(priv))
7468                 return -EAGAIN;
7469
7470         mutex_lock(&priv->mutex);
7471         rc = iwl_send_statistics_request(priv, 0);
7472         mutex_unlock(&priv->mutex);
7473
7474         if (rc) {
7475                 len = sprintf(buf,
7476                               "Error sending statistics request: 0x%08X\n", rc);
7477                 return len;
7478         }
7479
7480         while (size && (PAGE_SIZE - len)) {
7481                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
7482                                    PAGE_SIZE - len, 1);
7483                 len = strlen(buf);
7484                 if (PAGE_SIZE - len)
7485                         buf[len++] = '\n';
7486
7487                 ofs += 16;
7488                 size -= min(size, 16U);
7489         }
7490
7491         return len;
7492 }
7493
7494 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
7495
7496 static ssize_t show_antenna(struct device *d,
7497                             struct device_attribute *attr, char *buf)
7498 {
7499         struct iwl_priv *priv = dev_get_drvdata(d);
7500
7501         if (!iwl_is_alive(priv))
7502                 return -EAGAIN;
7503
7504         return sprintf(buf, "%d\n", priv->antenna);
7505 }
7506
7507 static ssize_t store_antenna(struct device *d,
7508                              struct device_attribute *attr,
7509                              const char *buf, size_t count)
7510 {
7511         int ant;
7512         struct iwl_priv *priv = dev_get_drvdata(d);
7513
7514         if (count == 0)
7515                 return 0;
7516
7517         if (sscanf(buf, "%1i", &ant) != 1) {
7518                 IWL_DEBUG_INFO("not in hex or decimal form.\n");
7519                 return count;
7520         }
7521
7522         if ((ant >= 0) && (ant <= 2)) {
7523                 IWL_DEBUG_INFO("Setting antenna select to %d.\n", ant);
7524                 priv->antenna = (enum iwl4965_antenna)ant;
7525         } else
7526                 IWL_DEBUG_INFO("Bad antenna select value %d.\n", ant);
7527
7528
7529         return count;
7530 }
7531
7532 static DEVICE_ATTR(antenna, S_IWUSR | S_IRUGO, show_antenna, store_antenna);
7533
7534 static ssize_t show_status(struct device *d,
7535                            struct device_attribute *attr, char *buf)
7536 {
7537         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7538         if (!iwl_is_alive(priv))
7539                 return -EAGAIN;
7540         return sprintf(buf, "0x%08x\n", (int)priv->status);
7541 }
7542
7543 static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
7544
7545 static ssize_t dump_error_log(struct device *d,
7546                               struct device_attribute *attr,
7547                               const char *buf, size_t count)
7548 {
7549         char *p = (char *)buf;
7550
7551         if (p[0] == '1')
7552                 iwl4965_dump_nic_error_log((struct iwl_priv *)d->driver_data);
7553
7554         return strnlen(buf, count);
7555 }
7556
7557 static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, dump_error_log);
7558
7559 static ssize_t dump_event_log(struct device *d,
7560                               struct device_attribute *attr,
7561                               const char *buf, size_t count)
7562 {
7563         char *p = (char *)buf;
7564
7565         if (p[0] == '1')
7566                 iwl4965_dump_nic_event_log((struct iwl_priv *)d->driver_data);
7567
7568         return strnlen(buf, count);
7569 }
7570
7571 static DEVICE_ATTR(dump_events, S_IWUSR, NULL, dump_event_log);
7572
7573 /*****************************************************************************
7574  *
7575  * driver setup and teardown
7576  *
7577  *****************************************************************************/
7578
7579 static void iwl4965_setup_deferred_work(struct iwl_priv *priv)
7580 {
7581         priv->workqueue = create_workqueue(DRV_NAME);
7582
7583         init_waitqueue_head(&priv->wait_command_queue);
7584
7585         INIT_WORK(&priv->up, iwl4965_bg_up);
7586         INIT_WORK(&priv->restart, iwl4965_bg_restart);
7587         INIT_WORK(&priv->rx_replenish, iwl4965_bg_rx_replenish);
7588         INIT_WORK(&priv->scan_completed, iwl4965_bg_scan_completed);
7589         INIT_WORK(&priv->request_scan, iwl4965_bg_request_scan);
7590         INIT_WORK(&priv->abort_scan, iwl4965_bg_abort_scan);
7591         INIT_WORK(&priv->rf_kill, iwl4965_bg_rf_kill);
7592         INIT_WORK(&priv->beacon_update, iwl4965_bg_beacon_update);
7593         INIT_DELAYED_WORK(&priv->post_associate, iwl4965_bg_post_associate);
7594         INIT_DELAYED_WORK(&priv->init_alive_start, iwl4965_bg_init_alive_start);
7595         INIT_DELAYED_WORK(&priv->alive_start, iwl4965_bg_alive_start);
7596         INIT_DELAYED_WORK(&priv->scan_check, iwl4965_bg_scan_check);
7597
7598         iwl4965_hw_setup_deferred_work(priv);
7599
7600         tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
7601                      iwl4965_irq_tasklet, (unsigned long)priv);
7602 }
7603
7604 static void iwl4965_cancel_deferred_work(struct iwl_priv *priv)
7605 {
7606         iwl4965_hw_cancel_deferred_work(priv);
7607
7608         cancel_delayed_work_sync(&priv->init_alive_start);
7609         cancel_delayed_work(&priv->scan_check);
7610         cancel_delayed_work(&priv->alive_start);
7611         cancel_delayed_work(&priv->post_associate);
7612         cancel_work_sync(&priv->beacon_update);
7613 }
7614
7615 static struct attribute *iwl4965_sysfs_entries[] = {
7616         &dev_attr_antenna.attr,
7617         &dev_attr_channels.attr,
7618         &dev_attr_dump_errors.attr,
7619         &dev_attr_dump_events.attr,
7620         &dev_attr_flags.attr,
7621         &dev_attr_filter_flags.attr,
7622 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
7623         &dev_attr_measurement.attr,
7624 #endif
7625         &dev_attr_power_level.attr,
7626         &dev_attr_retry_rate.attr,
7627         &dev_attr_rs_window.attr,
7628         &dev_attr_statistics.attr,
7629         &dev_attr_status.attr,
7630         &dev_attr_temperature.attr,
7631         &dev_attr_tx_power.attr,
7632
7633         NULL
7634 };
7635
7636 static struct attribute_group iwl4965_attribute_group = {
7637         .name = NULL,           /* put in device directory */
7638         .attrs = iwl4965_sysfs_entries,
7639 };
7640
7641 static struct ieee80211_ops iwl4965_hw_ops = {
7642         .tx = iwl4965_mac_tx,
7643         .start = iwl4965_mac_start,
7644         .stop = iwl4965_mac_stop,
7645         .add_interface = iwl4965_mac_add_interface,
7646         .remove_interface = iwl4965_mac_remove_interface,
7647         .config = iwl4965_mac_config,
7648         .config_interface = iwl4965_mac_config_interface,
7649         .configure_filter = iwl4965_configure_filter,
7650         .set_key = iwl4965_mac_set_key,
7651         .update_tkip_key = iwl4965_mac_update_tkip_key,
7652         .get_stats = iwl4965_mac_get_stats,
7653         .get_tx_stats = iwl4965_mac_get_tx_stats,
7654         .conf_tx = iwl4965_mac_conf_tx,
7655         .get_tsf = iwl4965_mac_get_tsf,
7656         .reset_tsf = iwl4965_mac_reset_tsf,
7657         .beacon_update = iwl4965_mac_beacon_update,
7658         .bss_info_changed = iwl4965_bss_info_changed,
7659 #ifdef CONFIG_IWL4965_HT
7660         .ampdu_action = iwl4965_mac_ampdu_action,
7661 #endif  /* CONFIG_IWL4965_HT */
7662         .hw_scan = iwl4965_mac_hw_scan
7663 };
7664
7665 static int iwl4965_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
7666 {
7667         int err = 0;
7668         struct iwl_priv *priv;
7669         struct ieee80211_hw *hw;
7670         struct iwl_cfg *cfg = (struct iwl_cfg *)(ent->driver_data);
7671         unsigned long flags;
7672         DECLARE_MAC_BUF(mac);
7673
7674         /************************
7675          * 1. Allocating HW data
7676          ************************/
7677
7678         /* Disabling hardware scan means that mac80211 will perform scans
7679          * "the hard way", rather than using device's scan. */
7680         if (cfg->mod_params->disable_hw_scan) {
7681                 IWL_DEBUG_INFO("Disabling hw_scan\n");
7682                 iwl4965_hw_ops.hw_scan = NULL;
7683         }
7684
7685         hw = iwl_alloc_all(cfg, &iwl4965_hw_ops);
7686         if (!hw) {
7687                 err = -ENOMEM;
7688                 goto out;
7689         }
7690         priv = hw->priv;
7691         /* At this point both hw and priv are allocated. */
7692
7693         SET_IEEE80211_DEV(hw, &pdev->dev);
7694
7695         IWL_DEBUG_INFO("*** LOAD DRIVER ***\n");
7696         priv->cfg = cfg;
7697         priv->pci_dev = pdev;
7698
7699 #ifdef CONFIG_IWLWIFI_DEBUG
7700         iwl_debug_level = priv->cfg->mod_params->debug;
7701         atomic_set(&priv->restrict_refcnt, 0);
7702 #endif
7703
7704         /**************************
7705          * 2. Initializing PCI bus
7706          **************************/
7707         if (pci_enable_device(pdev)) {
7708                 err = -ENODEV;
7709                 goto out_ieee80211_free_hw;
7710         }
7711
7712         pci_set_master(pdev);
7713
7714         err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
7715         if (!err)
7716                 err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
7717                 if (err) {
7718                         printk(KERN_WARNING DRV_NAME
7719                                 ": No suitable DMA available.\n");
7720                         goto out_pci_disable_device;
7721         }
7722
7723         err = pci_request_regions(pdev, DRV_NAME);
7724         if (err)
7725                 goto out_pci_disable_device;
7726
7727         pci_set_drvdata(pdev, priv);
7728
7729         /* We disable the RETRY_TIMEOUT register (0x41) to keep
7730          * PCI Tx retries from interfering with C3 CPU state */
7731         pci_write_config_byte(pdev, 0x41, 0x00);
7732
7733         /***********************
7734          * 3. Read REV register
7735          ***********************/
7736         priv->hw_base = pci_iomap(pdev, 0, 0);
7737         if (!priv->hw_base) {
7738                 err = -ENODEV;
7739                 goto out_pci_release_regions;
7740         }
7741
7742         IWL_DEBUG_INFO("pci_resource_len = 0x%08llx\n",
7743                 (unsigned long long) pci_resource_len(pdev, 0));
7744         IWL_DEBUG_INFO("pci_resource_base = %p\n", priv->hw_base);
7745
7746         printk(KERN_INFO DRV_NAME
7747                 ": Detected Intel Wireless WiFi Link %s\n", priv->cfg->name);
7748
7749         /*****************
7750          * 4. Read EEPROM
7751          *****************/
7752         /* nic init */
7753         iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
7754                 CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
7755
7756         iwl_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
7757         err = iwl_poll_bit(priv, CSR_GP_CNTRL,
7758                 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
7759                 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
7760         if (err < 0) {
7761                 IWL_DEBUG_INFO("Failed to init the card\n");
7762                 goto out_iounmap;
7763         }
7764         /* Read the EEPROM */
7765         err = iwl_eeprom_init(priv);
7766         if (err) {
7767                 IWL_ERROR("Unable to init EEPROM\n");
7768                 goto out_iounmap;
7769         }
7770         /* MAC Address location in EEPROM same for 3945/4965 */
7771         iwl_eeprom_get_mac(priv, priv->mac_addr);
7772         IWL_DEBUG_INFO("MAC address: %s\n", print_mac(mac, priv->mac_addr));
7773         SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
7774
7775         /************************
7776          * 5. Setup HW constants
7777          ************************/
7778         /* Device-specific setup */
7779         if (priv->cfg->ops->lib->set_hw_params(priv)) {
7780                 IWL_ERROR("failed to set hw parameters\n");
7781                 goto out_iounmap;
7782         }
7783
7784         /*******************
7785          * 6. Setup hw/priv
7786          *******************/
7787
7788         err = iwl_setup(priv);
7789         if (err)
7790                 goto out_unset_hw_params;
7791         /* At this point both hw and priv are initialized. */
7792
7793         /**********************************
7794          * 7. Initialize module parameters
7795          **********************************/
7796
7797         /* Disable radio (SW RF KILL) via parameter when loading driver */
7798         if (priv->cfg->mod_params->disable) {
7799                 set_bit(STATUS_RF_KILL_SW, &priv->status);
7800                 IWL_DEBUG_INFO("Radio disabled.\n");
7801         }
7802
7803         if (priv->cfg->mod_params->enable_qos)
7804                 priv->qos_data.qos_enable = 1;
7805
7806         /********************
7807          * 8. Setup services
7808          ********************/
7809         spin_lock_irqsave(&priv->lock, flags);
7810         iwl4965_disable_interrupts(priv);
7811         spin_unlock_irqrestore(&priv->lock, flags);
7812
7813         err = sysfs_create_group(&pdev->dev.kobj, &iwl4965_attribute_group);
7814         if (err) {
7815                 IWL_ERROR("failed to create sysfs device attributes\n");
7816                 goto out_unset_hw_params;
7817         }
7818
7819         err = iwl_dbgfs_register(priv, DRV_NAME);
7820         if (err) {
7821                 IWL_ERROR("failed to create debugfs files\n");
7822                 goto out_remove_sysfs;
7823         }
7824
7825         iwl4965_setup_deferred_work(priv);
7826         iwl4965_setup_rx_handlers(priv);
7827
7828         /********************
7829          * 9. Conclude
7830          ********************/
7831         pci_save_state(pdev);
7832         pci_disable_device(pdev);
7833
7834         /* notify iwlcore to init */
7835         iwlcore_low_level_notify(priv, IWLCORE_INIT_EVT);
7836         return 0;
7837
7838  out_remove_sysfs:
7839         sysfs_remove_group(&pdev->dev.kobj, &iwl4965_attribute_group);
7840  out_unset_hw_params:
7841         iwl4965_unset_hw_params(priv);
7842  out_iounmap:
7843         pci_iounmap(pdev, priv->hw_base);
7844  out_pci_release_regions:
7845         pci_release_regions(pdev);
7846         pci_set_drvdata(pdev, NULL);
7847  out_pci_disable_device:
7848         pci_disable_device(pdev);
7849  out_ieee80211_free_hw:
7850         ieee80211_free_hw(priv->hw);
7851  out:
7852         return err;
7853 }
7854
7855 static void __devexit iwl4965_pci_remove(struct pci_dev *pdev)
7856 {
7857         struct iwl_priv *priv = pci_get_drvdata(pdev);
7858         struct list_head *p, *q;
7859         int i;
7860         unsigned long flags;
7861
7862         if (!priv)
7863                 return;
7864
7865         IWL_DEBUG_INFO("*** UNLOAD DRIVER ***\n");
7866
7867         if (priv->mac80211_registered) {
7868                 ieee80211_unregister_hw(priv->hw);
7869                 priv->mac80211_registered = 0;
7870         }
7871
7872         set_bit(STATUS_EXIT_PENDING, &priv->status);
7873
7874         iwl4965_down(priv);
7875
7876         /* make sure we flush any pending irq or
7877          * tasklet for the driver
7878          */
7879         spin_lock_irqsave(&priv->lock, flags);
7880         iwl4965_disable_interrupts(priv);
7881         spin_unlock_irqrestore(&priv->lock, flags);
7882
7883         iwl_synchronize_irq(priv);
7884
7885         /* Free MAC hash list for ADHOC */
7886         for (i = 0; i < IWL_IBSS_MAC_HASH_SIZE; i++) {
7887                 list_for_each_safe(p, q, &priv->ibss_mac_hash[i]) {
7888                         list_del(p);
7889                         kfree(list_entry(p, struct iwl4965_ibss_seq, list));
7890                 }
7891         }
7892
7893         iwlcore_low_level_notify(priv, IWLCORE_REMOVE_EVT);
7894         iwl_dbgfs_unregister(priv);
7895         sysfs_remove_group(&pdev->dev.kobj, &iwl4965_attribute_group);
7896
7897         iwl4965_dealloc_ucode_pci(priv);
7898
7899         if (priv->rxq.bd)
7900                 iwl4965_rx_queue_free(priv, &priv->rxq);
7901         iwl4965_hw_txq_ctx_free(priv);
7902
7903         iwl4965_unset_hw_params(priv);
7904         iwlcore_clear_stations_table(priv);
7905
7906
7907         /*netif_stop_queue(dev); */
7908         flush_workqueue(priv->workqueue);
7909
7910         /* ieee80211_unregister_hw calls iwl4965_mac_stop, which flushes
7911          * priv->workqueue... so we can't take down the workqueue
7912          * until now... */
7913         destroy_workqueue(priv->workqueue);
7914         priv->workqueue = NULL;
7915
7916         pci_iounmap(pdev, priv->hw_base);
7917         pci_release_regions(pdev);
7918         pci_disable_device(pdev);
7919         pci_set_drvdata(pdev, NULL);
7920
7921         iwl_free_channel_map(priv);
7922         iwl4965_free_geos(priv);
7923
7924         if (priv->ibss_beacon)
7925                 dev_kfree_skb(priv->ibss_beacon);
7926
7927         ieee80211_free_hw(priv->hw);
7928 }
7929
7930 #ifdef CONFIG_PM
7931
7932 static int iwl4965_pci_suspend(struct pci_dev *pdev, pm_message_t state)
7933 {
7934         struct iwl_priv *priv = pci_get_drvdata(pdev);
7935
7936         if (priv->is_open) {
7937                 set_bit(STATUS_IN_SUSPEND, &priv->status);
7938                 iwl4965_mac_stop(priv->hw);
7939                 priv->is_open = 1;
7940         }
7941
7942         pci_set_power_state(pdev, PCI_D3hot);
7943
7944         return 0;
7945 }
7946
7947 static int iwl4965_pci_resume(struct pci_dev *pdev)
7948 {
7949         struct iwl_priv *priv = pci_get_drvdata(pdev);
7950
7951         pci_set_power_state(pdev, PCI_D0);
7952
7953         if (priv->is_open)
7954                 iwl4965_mac_start(priv->hw);
7955
7956         clear_bit(STATUS_IN_SUSPEND, &priv->status);
7957         return 0;
7958 }
7959
7960 #endif /* CONFIG_PM */
7961
7962 /*****************************************************************************
7963  *
7964  * driver and module entry point
7965  *
7966  *****************************************************************************/
7967
7968 /* Hardware specific file defines the PCI IDs table for that hardware module */
7969 static struct pci_device_id iwl_hw_card_ids[] = {
7970         {IWL_PCI_DEVICE(0x4229, PCI_ANY_ID, iwl4965_agn_cfg)},
7971         {IWL_PCI_DEVICE(0x4230, PCI_ANY_ID, iwl4965_agn_cfg)},
7972         {0}
7973 };
7974 MODULE_DEVICE_TABLE(pci, iwl_hw_card_ids);
7975
7976 static struct pci_driver iwl_driver = {
7977         .name = DRV_NAME,
7978         .id_table = iwl_hw_card_ids,
7979         .probe = iwl4965_pci_probe,
7980         .remove = __devexit_p(iwl4965_pci_remove),
7981 #ifdef CONFIG_PM
7982         .suspend = iwl4965_pci_suspend,
7983         .resume = iwl4965_pci_resume,
7984 #endif
7985 };
7986
7987 static int __init iwl4965_init(void)
7988 {
7989
7990         int ret;
7991         printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
7992         printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
7993
7994         ret = iwl4965_rate_control_register();
7995         if (ret) {
7996                 IWL_ERROR("Unable to register rate control algorithm: %d\n", ret);
7997                 return ret;
7998         }
7999
8000         ret = pci_register_driver(&iwl_driver);
8001         if (ret) {
8002                 IWL_ERROR("Unable to initialize PCI module\n");
8003                 goto error_register;
8004         }
8005 #ifdef CONFIG_IWLWIFI_DEBUG
8006         ret = driver_create_file(&iwl_driver.driver, &driver_attr_debug_level);
8007         if (ret) {
8008                 IWL_ERROR("Unable to create driver sysfs file\n");
8009                 goto error_debug;
8010         }
8011 #endif
8012
8013         return ret;
8014
8015 #ifdef CONFIG_IWLWIFI_DEBUG
8016 error_debug:
8017         pci_unregister_driver(&iwl_driver);
8018 #endif
8019 error_register:
8020         iwl4965_rate_control_unregister();
8021         return ret;
8022 }
8023
8024 static void __exit iwl4965_exit(void)
8025 {
8026 #ifdef CONFIG_IWLWIFI_DEBUG
8027         driver_remove_file(&iwl_driver.driver, &driver_attr_debug_level);
8028 #endif
8029         pci_unregister_driver(&iwl_driver);
8030         iwl4965_rate_control_unregister();
8031 }
8032
8033 module_exit(iwl4965_exit);
8034 module_init(iwl4965_init);