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-dev.h"
  50 #include "iwl-core.h"
  51 #include "iwl-io.h"
  52 #include "iwl-helpers.h"
  53 #include "iwl-sta.h"
  54 #include "iwl-calib.h"
  55
  56
  57 /******************************************************************************
  58  *
  59  * module boiler plate
  60  *
  61  ******************************************************************************/
  62
  63 /*
  64  * module name, copyright, version, etc.
  65  * NOTE: DRV_NAME is defined in iwlwifi.h for use by iwl-debug.h and printk
  66  */
  67
  68 #define DRV_DESCRIPTION "Intel(R) Wireless WiFi Link 4965AGN driver for Linux"
  69
  70 #ifdef CONFIG_IWLWIFI_DEBUG
  71 #define VD "d"
  72 #else
  73 #define VD
  74 #endif
  75
  76 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
  77 #define VS "s"
  78 #else
  79 #define VS
  80 #endif
  81
  82 #define DRV_VERSION     IWLWIFI_VERSION VD VS
  83
  84
  85 MODULE_DESCRIPTION(DRV_DESCRIPTION);
  86 MODULE_VERSION(DRV_VERSION);
  87 MODULE_AUTHOR(DRV_COPYRIGHT);
  88 MODULE_LICENSE("GPL");
  89
  90 static int iwl4965_is_empty_essid(const char *essid, int essid_len)
  91 {
  92         /* Single white space is for Linksys APs */
  93         if (essid_len == 1 && essid[0] == ' ')
  94                 return 1;
  95
  96         /* Otherwise, if the entire essid is 0, we assume it is hidden */
  97         while (essid_len) {
  98                 essid_len--;
  99                 if (essid[essid_len] != '\0')
 100                         return 0;
 101         }
 102
 103         return 1;
 104 }
 105
 106 static const char *iwl4965_escape_essid(const char *essid, u8 essid_len)
 107 {
 108         static char escaped[IW_ESSID_MAX_SIZE * 2 + 1];
 109         const char *s = essid;
 110         char *d = escaped;
 111
 112         if (iwl4965_is_empty_essid(essid, essid_len)) {
 113                 memcpy(escaped, "<hidden>", sizeof("<hidden>"));
 114                 return escaped;
 115         }
 116
 117         essid_len = min(essid_len, (u8) IW_ESSID_MAX_SIZE);
 118         while (essid_len--) {
 119                 if (*s == '\0') {
 120                         *d++ = '\\';
 121                         *d++ = '0';
 122                         s++;
 123                 } else
 124                         *d++ = *s++;
 125         }
 126         *d = '\0';
 127         return escaped;
 128 }
 129
 130 /*************** STATION TABLE MANAGEMENT ****
 131  * mac80211 should be examined to determine if sta_info is duplicating
 132  * the functionality provided here
 133  */
 134
 135 /**************************************************************/
 136
 137
 138
 139 static void iwl4965_set_rxon_hwcrypto(struct iwl_priv *priv, int hw_decrypt)
 140 {
 141         struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
 142
 143         if (hw_decrypt)
 144                 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
 145         else
 146                 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
 147
 148 }
 149
 150 /**
 151  * iwl4965_check_rxon_cmd - validate RXON structure is valid
 152  *
 153  * NOTE:  This is really only useful during development and can eventually
 154  * be #ifdef'd out once the driver is stable and folks aren't actively
 155  * making changes
 156  */
 157 static int iwl4965_check_rxon_cmd(struct iwl_rxon_cmd *rxon)
 158 {
 159         int error = 0;
 160         int counter = 1;
 161
 162         if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
 163                 error |= le32_to_cpu(rxon->flags &
 164                                 (RXON_FLG_TGJ_NARROW_BAND_MSK |
 165                                  RXON_FLG_RADAR_DETECT_MSK));
 166                 if (error)
 167                         IWL_WARNING("check 24G fields %d | %d\n",
 168                                     counter++, error);
 169         } else {
 170                 error |= (rxon->flags & RXON_FLG_SHORT_SLOT_MSK) ?
 171                                 0 : le32_to_cpu(RXON_FLG_SHORT_SLOT_MSK);
 172                 if (error)
 173                         IWL_WARNING("check 52 fields %d | %d\n",
 174                                     counter++, error);
 175                 error |= le32_to_cpu(rxon->flags & RXON_FLG_CCK_MSK);
 176                 if (error)
 177                         IWL_WARNING("check 52 CCK %d | %d\n",
 178                                     counter++, error);
 179         }
 180         error |= (rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1;
 181         if (error)
 182                 IWL_WARNING("check mac addr %d | %d\n", counter++, error);
 183
 184         /* make sure basic rates 6Mbps and 1Mbps are supported */
 185         error |= (((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0) &&
 186                   ((rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0));
 187         if (error)
 188                 IWL_WARNING("check basic rate %d | %d\n", counter++, error);
 189
 190         error |= (le16_to_cpu(rxon->assoc_id) > 2007);
 191         if (error)
 192                 IWL_WARNING("check assoc id %d | %d\n", counter++, error);
 193
 194         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
 195                         == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK));
 196         if (error)
 197                 IWL_WARNING("check CCK and short slot %d | %d\n",
 198                             counter++, error);
 199
 200         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
 201                         == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK));
 202         if (error)
 203                 IWL_WARNING("check CCK & auto detect %d | %d\n",
 204                             counter++, error);
 205
 206         error |= ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
 207                         RXON_FLG_TGG_PROTECT_MSK)) == RXON_FLG_TGG_PROTECT_MSK);
 208         if (error)
 209                 IWL_WARNING("check TGG and auto detect %d | %d\n",
 210                             counter++, error);
 211
 212         if (error)
 213                 IWL_WARNING("Tuning to channel %d\n",
 214                             le16_to_cpu(rxon->channel));
 215
 216         if (error) {
 217                 IWL_ERROR("Not a valid iwl4965_rxon_assoc_cmd field values\n");
 218                 return -1;
 219         }
 220         return 0;
 221 }
 222
 223 /**
 224  * iwl4965_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
 225  * @priv: staging_rxon is compared to active_rxon
 226  *
 227  * If the RXON structure is changing enough to require a new tune,
 228  * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
 229  * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
 230  */
 231 static int iwl4965_full_rxon_required(struct iwl_priv *priv)
 232 {
 233
 234         /* These items are only settable from the full RXON command */
 235         if (!(priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) ||
 236             compare_ether_addr(priv->staging_rxon.bssid_addr,
 237                                priv->active_rxon.bssid_addr) ||
 238             compare_ether_addr(priv->staging_rxon.node_addr,
 239                                priv->active_rxon.node_addr) ||
 240             compare_ether_addr(priv->staging_rxon.wlap_bssid_addr,
 241                                priv->active_rxon.wlap_bssid_addr) ||
 242             (priv->staging_rxon.dev_type != priv->active_rxon.dev_type) ||
 243             (priv->staging_rxon.channel != priv->active_rxon.channel) ||
 244             (priv->staging_rxon.air_propagation !=
 245              priv->active_rxon.air_propagation) ||
 246             (priv->staging_rxon.ofdm_ht_single_stream_basic_rates !=
 247              priv->active_rxon.ofdm_ht_single_stream_basic_rates) ||
 248             (priv->staging_rxon.ofdm_ht_dual_stream_basic_rates !=
 249              priv->active_rxon.ofdm_ht_dual_stream_basic_rates) ||
 250             (priv->staging_rxon.rx_chain != priv->active_rxon.rx_chain) ||
 251             (priv->staging_rxon.assoc_id != priv->active_rxon.assoc_id))
 252                 return 1;
 253
 254         /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
 255          * be updated with the RXON_ASSOC command -- however only some
 256          * flag transitions are allowed using RXON_ASSOC */
 257
 258         /* Check if we are not switching bands */
 259         if ((priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) !=
 260             (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK))
 261                 return 1;
 262
 263         /* Check if we are switching association toggle */
 264         if ((priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) !=
 265                 (priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK))
 266                 return 1;
 267
 268         return 0;
 269 }
 270
 271 /**
 272  * iwl4965_commit_rxon - commit staging_rxon to hardware
 273  *
 274  * The RXON command in staging_rxon is committed to the hardware and
 275  * the active_rxon structure is updated with the new data.  This
 276  * function correctly transitions out of the RXON_ASSOC_MSK state if
 277  * a HW tune is required based on the RXON structure changes.
 278  */
 279 static int iwl4965_commit_rxon(struct iwl_priv *priv)
 280 {
 281         /* cast away the const for active_rxon in this function */
 282         struct iwl_rxon_cmd *active_rxon = (void *)&priv->active_rxon;
 283         DECLARE_MAC_BUF(mac);
 284         int rc = 0;
 285
 286         if (!iwl_is_alive(priv))
 287                 return -1;
 288
 289         /* always get timestamp with Rx frame */
 290         priv->staging_rxon.flags |= RXON_FLG_TSF2HOST_MSK;
 291
 292         rc = iwl4965_check_rxon_cmd(&priv->staging_rxon);
 293         if (rc) {
 294                 IWL_ERROR("Invalid RXON configuration.  Not committing.\n");
 295                 return -EINVAL;
 296         }
 297
 298         /* If we don't need to send a full RXON, we can use
 299          * iwl4965_rxon_assoc_cmd which is used to reconfigure filter
 300          * and other flags for the current radio configuration. */
 301         if (!iwl4965_full_rxon_required(priv)) {
 302                 rc = iwl_send_rxon_assoc(priv);
 303                 if (rc) {
 304                         IWL_ERROR("Error setting RXON_ASSOC "
 305                                   "configuration (%d).\n", rc);
 306                         return rc;
 307                 }
 308
 309                 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
 310
 311                 return 0;
 312         }
 313
 314         /* station table will be cleared */
 315         priv->assoc_station_added = 0;
 316
 317         /* If we are currently associated and the new config requires
 318          * an RXON_ASSOC and the new config wants the associated mask enabled,
 319          * we must clear the associated from the active configuration
 320          * before we apply the new config */
 321         if (iwl_is_associated(priv) &&
 322             (priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK)) {
 323                 IWL_DEBUG_INFO("Toggling associated bit on current RXON\n");
 324                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
 325
 326                 rc = iwl_send_cmd_pdu(priv, REPLY_RXON,
 327                                       sizeof(struct iwl_rxon_cmd),
 328                                       &priv->active_rxon);
 329
 330                 /* If the mask clearing failed then we set
 331                  * active_rxon back to what it was previously */
 332                 if (rc) {
 333                         active_rxon->filter_flags |= RXON_FILTER_ASSOC_MSK;
 334                         IWL_ERROR("Error clearing ASSOC_MSK on current "
 335                                   "configuration (%d).\n", rc);
 336                         return rc;
 337                 }
 338         }
 339
 340         IWL_DEBUG_INFO("Sending RXON\n"
 341                        "* with%s RXON_FILTER_ASSOC_MSK\n"
 342                        "* channel = %d\n"
 343                        "* bssid = %s\n",
 344                        ((priv->staging_rxon.filter_flags &
 345                          RXON_FILTER_ASSOC_MSK) ? "" : "out"),
 346                        le16_to_cpu(priv->staging_rxon.channel),
 347                        print_mac(mac, priv->staging_rxon.bssid_addr));
 348
 349         iwl4965_set_rxon_hwcrypto(priv, !priv->hw_params.sw_crypto);
 350         /* Apply the new configuration */
 351         rc = iwl_send_cmd_pdu(priv, REPLY_RXON,
 352                               sizeof(struct iwl_rxon_cmd), &priv->staging_rxon);
 353         if (rc) {
 354                 IWL_ERROR("Error setting new configuration (%d).\n", rc);
 355                 return rc;
 356         }
 357
 358         iwl_remove_station(priv, iwl_bcast_addr, 0);
 359         iwlcore_clear_stations_table(priv);
 360
 361         if (!priv->error_recovering)
 362                 priv->start_calib = 0;
 363
 364         iwl_init_sensitivity(priv);
 365
 366         memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
 367
 368         /* If we issue a new RXON command which required a tune then we must
 369          * send a new TXPOWER command or we won't be able to Tx any frames */
 370         rc = iwl4965_hw_reg_send_txpower(priv);
 371         if (rc) {
 372                 IWL_ERROR("Error setting Tx power (%d).\n", rc);
 373                 return rc;
 374         }
 375
 376         /* Add the broadcast address so we can send broadcast frames */
 377         if (iwl_rxon_add_station(priv, iwl_bcast_addr, 0) ==
 378             IWL_INVALID_STATION) {
 379                 IWL_ERROR("Error adding BROADCAST address for transmit.\n");
 380                 return -EIO;
 381         }
 382
 383         /* If we have set the ASSOC_MSK and we are in BSS mode then
 384          * add the IWL_AP_ID to the station rate table */
 385         if (iwl_is_associated(priv) &&
 386             (priv->iw_mode == IEEE80211_IF_TYPE_STA)) {
 387                 if (iwl_rxon_add_station(priv, priv->active_rxon.bssid_addr, 1)
 388                     == IWL_INVALID_STATION) {
 389                         IWL_ERROR("Error adding AP address for transmit.\n");
 390                         return -EIO;
 391                 }
 392                 priv->assoc_station_added = 1;
 393                 if (priv->default_wep_key &&
 394                     iwl_send_static_wepkey_cmd(priv, 0))
 395                         IWL_ERROR("Could not send WEP static key.\n");
 396         }
 397
 398         return 0;
 399 }
 400
 401 void iwl4965_update_chain_flags(struct iwl_priv *priv)
 402 {
 403
 404         iwl_set_rxon_chain(priv);
 405         iwl4965_commit_rxon(priv);
 406 }
 407
 408 static int iwl4965_send_bt_config(struct iwl_priv *priv)
 409 {
 410         struct iwl4965_bt_cmd bt_cmd = {
 411                 .flags = 3,
 412                 .lead_time = 0xAA,
 413                 .max_kill = 1,
 414                 .kill_ack_mask = 0,
 415                 .kill_cts_mask = 0,
 416         };
 417
 418         return iwl_send_cmd_pdu(priv, REPLY_BT_CONFIG,
 419                                 sizeof(struct iwl4965_bt_cmd), &bt_cmd);
 420 }
 421
 422 static int iwl4965_send_scan_abort(struct iwl_priv *priv)
 423 {
 424         int ret = 0;
 425         struct iwl_rx_packet *res;
 426         struct iwl_host_cmd cmd = {
 427                 .id = REPLY_SCAN_ABORT_CMD,
 428                 .meta.flags = CMD_WANT_SKB,
 429         };
 430
 431         /* If there isn't a scan actively going on in the hardware
 432          * then we are in between scan bands and not actually
 433          * actively scanning, so don't send the abort command */
 434         if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
 435                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
 436                 return 0;
 437         }
 438
 439         ret = iwl_send_cmd_sync(priv, &cmd);
 440         if (ret) {
 441                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
 442                 return ret;
 443         }
 444
 445         res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
 446         if (res->u.status != CAN_ABORT_STATUS) {
 447                 /* The scan abort will return 1 for success or
 448                  * 2 for "failure".  A failure condition can be
 449                  * due to simply not being in an active scan which
 450                  * can occur if we send the scan abort before we
 451                  * the microcode has notified us that a scan is
 452                  * completed. */
 453                 IWL_DEBUG_INFO("SCAN_ABORT returned %d.\n", res->u.status);
 454                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
 455                 clear_bit(STATUS_SCAN_HW, &priv->status);
 456         }
 457
 458         dev_kfree_skb_any(cmd.meta.u.skb);
 459
 460         return ret;
 461 }
 462
 463 /*
 464  * CARD_STATE_CMD
 465  *
 466  * Use: Sets the device's internal card state to enable, disable, or halt
 467  *
 468  * When in the 'enable' state the card operates as normal.
 469  * When in the 'disable' state, the card enters into a low power mode.
 470  * When in the 'halt' state, the card is shut down and must be fully
 471  * restarted to come back on.
 472  */
 473 static int iwl4965_send_card_state(struct iwl_priv *priv, u32 flags, u8 meta_flag)
 474 {
 475         struct iwl_host_cmd cmd = {
 476                 .id = REPLY_CARD_STATE_CMD,
 477                 .len = sizeof(u32),
 478                 .data = &flags,
 479                 .meta.flags = meta_flag,
 480         };
 481
 482         return iwl_send_cmd(priv, &cmd);
 483 }
 484
 485 static void iwl_clear_free_frames(struct iwl_priv *priv)
 486 {
 487         struct list_head *element;
 488
 489         IWL_DEBUG_INFO("%d frames on pre-allocated heap on clear.\n",
 490                        priv->frames_count);
 491
 492         while (!list_empty(&priv->free_frames)) {
 493                 element = priv->free_frames.next;
 494                 list_del(element);
 495                 kfree(list_entry(element, struct iwl_frame, list));
 496                 priv->frames_count--;
 497         }
 498
 499         if (priv->frames_count) {
 500                 IWL_WARNING("%d frames still in use.  Did we lose one?\n",
 501                             priv->frames_count);
 502                 priv->frames_count = 0;
 503         }
 504 }
 505
 506 static struct iwl_frame *iwl_get_free_frame(struct iwl_priv *priv)
 507 {
 508         struct iwl_frame *frame;
 509         struct list_head *element;
 510         if (list_empty(&priv->free_frames)) {
 511                 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
 512                 if (!frame) {
 513                         IWL_ERROR("Could not allocate frame!\n");
 514                         return NULL;
 515                 }
 516
 517                 priv->frames_count++;
 518                 return frame;
 519         }
 520
 521         element = priv->free_frames.next;
 522         list_del(element);
 523         return list_entry(element, struct iwl_frame, list);
 524 }
 525
 526 static void iwl_free_frame(struct iwl_priv *priv, struct iwl_frame *frame)
 527 {
 528         memset(frame, 0, sizeof(*frame));
 529         list_add(&frame->list, &priv->free_frames);
 530 }
 531
 532 unsigned int iwl4965_fill_beacon_frame(struct iwl_priv *priv,
 533                                 struct ieee80211_hdr *hdr,
 534                                 const u8 *dest, int left)
 535 {
 536
 537         if (!iwl_is_associated(priv) || !priv->ibss_beacon ||
 538             ((priv->iw_mode != IEEE80211_IF_TYPE_IBSS) &&
 539              (priv->iw_mode != IEEE80211_IF_TYPE_AP)))
 540                 return 0;
 541
 542         if (priv->ibss_beacon->len > left)
 543                 return 0;
 544
 545         memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);
 546
 547         return priv->ibss_beacon->len;
 548 }
 549
 550 static u8 iwl4965_rate_get_lowest_plcp(struct iwl_priv *priv)
 551 {
 552         int i;
 553         int rate_mask;
 554
 555         /* Set rate mask*/
 556         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)
 557                 rate_mask = priv->active_rate_basic & 0xF;
 558         else
 559                 rate_mask = priv->active_rate_basic & 0xFF0;
 560
 561         /* Find lowest valid rate */
 562         for (i = IWL_RATE_1M_INDEX; i != IWL_RATE_INVALID;
 563                                         i = iwl_rates[i].next_ieee) {
 564                 if (rate_mask & (1 << i))
 565                         return iwl_rates[i].plcp;
 566         }
 567
 568         /* No valid rate was found. Assign the lowest one */
 569         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)
 570                 return IWL_RATE_1M_PLCP;
 571         else
 572                 return IWL_RATE_6M_PLCP;
 573 }
 574
 575 static int iwl4965_send_beacon_cmd(struct iwl_priv *priv)
 576 {
 577         struct iwl_frame *frame;
 578         unsigned int frame_size;
 579         int rc;
 580         u8 rate;
 581
 582         frame = iwl_get_free_frame(priv);
 583
 584         if (!frame) {
 585                 IWL_ERROR("Could not obtain free frame buffer for beacon "
 586                           "command.\n");
 587                 return -ENOMEM;
 588         }
 589
 590         rate = iwl4965_rate_get_lowest_plcp(priv);
 591
 592         frame_size = iwl4965_hw_get_beacon_cmd(priv, frame, rate);
 593
 594         rc = iwl_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
 595                               &frame->u.cmd[0]);
 596
 597         iwl_free_frame(priv, frame);
 598
 599         return rc;
 600 }
 601
 602 /******************************************************************************
 603  *
 604  * Misc. internal state and helper functions
 605  *
 606  ******************************************************************************/
 607
 608 /**
 609  * iwl4965_supported_rate_to_ie - fill in the supported rate in IE field
 610  *
 611  * return : set the bit for each supported rate insert in ie
 612  */
 613 static u16 iwl4965_supported_rate_to_ie(u8 *ie, u16 supported_rate,
 614                                     u16 basic_rate, int *left)
 615 {
 616         u16 ret_rates = 0, bit;
 617         int i;
 618         u8 *cnt = ie;
 619         u8 *rates = ie + 1;
 620
 621         for (bit = 1, i = 0; i < IWL_RATE_COUNT; i++, bit <<= 1) {
 622                 if (bit & supported_rate) {
 623                         ret_rates |= bit;
 624                         rates[*cnt] = iwl_rates[i].ieee |
 625                                 ((bit & basic_rate) ? 0x80 : 0x00);
 626                         (*cnt)++;
 627                         (*left)--;
 628                         if ((*left <= 0) ||
 629                             (*cnt >= IWL_SUPPORTED_RATES_IE_LEN))
 630                                 break;
 631                 }
 632         }
 633
 634         return ret_rates;
 635 }
 636
 637 static void iwl4965_ht_conf(struct iwl_priv *priv,
 638                             struct ieee80211_bss_conf *bss_conf)
 639 {
 640         struct ieee80211_ht_info *ht_conf = bss_conf->ht_conf;
 641         struct ieee80211_ht_bss_info *ht_bss_conf = bss_conf->ht_bss_conf;
 642         struct iwl_ht_info *iwl_conf = &priv->current_ht_config;
 643
 644         IWL_DEBUG_MAC80211("enter: \n");
 645
 646         iwl_conf->is_ht = bss_conf->assoc_ht;
 647
 648         if (!iwl_conf->is_ht)
 649                 return;
 650
 651         priv->ps_mode = (u8)((ht_conf->cap & IEEE80211_HT_CAP_MIMO_PS) >> 2);
 652
 653         if (ht_conf->cap & IEEE80211_HT_CAP_SGI_20)
 654                 iwl_conf->sgf |= HT_SHORT_GI_20MHZ;
 655         if (ht_conf->cap & IEEE80211_HT_CAP_SGI_40)
 656                 iwl_conf->sgf |= HT_SHORT_GI_40MHZ;
 657
 658         iwl_conf->is_green_field = !!(ht_conf->cap & IEEE80211_HT_CAP_GRN_FLD);
 659         iwl_conf->max_amsdu_size =
 660                 !!(ht_conf->cap & IEEE80211_HT_CAP_MAX_AMSDU);
 661
 662         iwl_conf->supported_chan_width =
 663                 !!(ht_conf->cap & IEEE80211_HT_CAP_SUP_WIDTH);
 664         iwl_conf->extension_chan_offset =
 665                 ht_bss_conf->bss_cap & IEEE80211_HT_IE_CHA_SEC_OFFSET;
 666         /* If no above or below channel supplied disable FAT channel */
 667         if (iwl_conf->extension_chan_offset != IEEE80211_HT_IE_CHA_SEC_ABOVE &&
 668             iwl_conf->extension_chan_offset != IEEE80211_HT_IE_CHA_SEC_BELOW) {
 669                 iwl_conf->extension_chan_offset = IEEE80211_HT_IE_CHA_SEC_NONE;
 670                 iwl_conf->supported_chan_width = 0;
 671         }
 672
 673         iwl_conf->tx_mimo_ps_mode =
 674                 (u8)((ht_conf->cap & IEEE80211_HT_CAP_MIMO_PS) >> 2);
 675         memcpy(iwl_conf->supp_mcs_set, ht_conf->supp_mcs_set, 16);
 676
 677         iwl_conf->control_channel = ht_bss_conf->primary_channel;
 678         iwl_conf->tx_chan_width =
 679                 !!(ht_bss_conf->bss_cap & IEEE80211_HT_IE_CHA_WIDTH);
 680         iwl_conf->ht_protection =
 681                 ht_bss_conf->bss_op_mode & IEEE80211_HT_IE_HT_PROTECTION;
 682         iwl_conf->non_GF_STA_present =
 683                 !!(ht_bss_conf->bss_op_mode & IEEE80211_HT_IE_NON_GF_STA_PRSNT);
 684
 685         IWL_DEBUG_MAC80211("control channel %d\n", iwl_conf->control_channel);
 686         IWL_DEBUG_MAC80211("leave\n");
 687 }
 688
 689 static void iwl_ht_cap_to_ie(const struct ieee80211_supported_band *sband,
 690                         u8 *pos, int *left)
 691 {
 692         struct ieee80211_ht_cap *ht_cap;
 693
 694         if (!sband || !sband->ht_info.ht_supported)
 695                 return;
 696
 697         if (*left < sizeof(struct ieee80211_ht_cap))
 698                 return;
 699
 700         *pos++ = sizeof(struct ieee80211_ht_cap);
 701         ht_cap = (struct ieee80211_ht_cap *) pos;
 702
 703         ht_cap->cap_info = cpu_to_le16(sband->ht_info.cap);
 704         memcpy(ht_cap->supp_mcs_set, sband->ht_info.supp_mcs_set, 16);
 705         ht_cap->ampdu_params_info =
 706                 (sband->ht_info.ampdu_factor & IEEE80211_HT_CAP_AMPDU_FACTOR) |
 707                 ((sband->ht_info.ampdu_density << 2) &
 708                         IEEE80211_HT_CAP_AMPDU_DENSITY);
 709         *left -= sizeof(struct ieee80211_ht_cap);
 710 }
 711
 712 /**
 713  * iwl4965_fill_probe_req - fill in all required fields and IE for probe request
 714  */
 715 static u16 iwl4965_fill_probe_req(struct iwl_priv *priv,
 716                                   enum ieee80211_band band,
 717                                   struct ieee80211_mgmt *frame,
 718                                   int left, int is_direct)
 719 {
 720         int len = 0;
 721         u8 *pos = NULL;
 722         u16 active_rates, ret_rates, cck_rates, active_rate_basic;
 723         const struct ieee80211_supported_band *sband =
 724                                                 iwl_get_hw_mode(priv, band);
 725
 726         /* Make sure there is enough space for the probe request,
 727          * two mandatory IEs and the data */
 728         left -= 24;
 729         if (left < 0)
 730                 return 0;
 731         len += 24;
 732
 733         frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
 734         memcpy(frame->da, iwl_bcast_addr, ETH_ALEN);
 735         memcpy(frame->sa, priv->mac_addr, ETH_ALEN);
 736         memcpy(frame->bssid, iwl_bcast_addr, ETH_ALEN);
 737         frame->seq_ctrl = 0;
 738
 739         /* fill in our indirect SSID IE */
 740         /* ...next IE... */
 741
 742         left -= 2;
 743         if (left < 0)
 744                 return 0;
 745         len += 2;
 746         pos = &(frame->u.probe_req.variable[0]);
 747         *pos++ = WLAN_EID_SSID;
 748         *pos++ = 0;
 749
 750         /* fill in our direct SSID IE... */
 751         if (is_direct) {
 752                 /* ...next IE... */
 753                 left -= 2 + priv->essid_len;
 754                 if (left < 0)
 755                         return 0;
 756                 /* ... fill it in... */
 757                 *pos++ = WLAN_EID_SSID;
 758                 *pos++ = priv->essid_len;
 759                 memcpy(pos, priv->essid, priv->essid_len);
 760                 pos += priv->essid_len;
 761                 len += 2 + priv->essid_len;
 762         }
 763
 764         /* fill in supported rate */
 765         /* ...next IE... */
 766         left -= 2;
 767         if (left < 0)
 768                 return 0;
 769
 770         /* ... fill it in... */
 771         *pos++ = WLAN_EID_SUPP_RATES;
 772         *pos = 0;
 773
 774         /* exclude 60M rate */
 775         active_rates = priv->rates_mask;
 776         active_rates &= ~IWL_RATE_60M_MASK;
 777
 778         active_rate_basic = active_rates & IWL_BASIC_RATES_MASK;
 779
 780         cck_rates = IWL_CCK_RATES_MASK & active_rates;
 781         ret_rates = iwl4965_supported_rate_to_ie(pos, cck_rates,
 782                         active_rate_basic, &left);
 783         active_rates &= ~ret_rates;
 784
 785         ret_rates = iwl4965_supported_rate_to_ie(pos, active_rates,
 786                                  active_rate_basic, &left);
 787         active_rates &= ~ret_rates;
 788
 789         len += 2 + *pos;
 790         pos += (*pos) + 1;
 791         if (active_rates == 0)
 792                 goto fill_end;
 793
 794         /* fill in supported extended rate */
 795         /* ...next IE... */
 796         left -= 2;
 797         if (left < 0)
 798                 return 0;
 799         /* ... fill it in... */
 800         *pos++ = WLAN_EID_EXT_SUPP_RATES;
 801         *pos = 0;
 802         iwl4965_supported_rate_to_ie(pos, active_rates,
 803                                  active_rate_basic, &left);
 804         if (*pos > 0)
 805                 len += 2 + *pos;
 806
 807  fill_end:
 808         /* fill in HT IE */
 809         left -= 2;
 810         if (left < 0)
 811                 return 0;
 812
 813         *pos++ = WLAN_EID_HT_CAPABILITY;
 814         *pos = 0;
 815
 816         iwl_ht_cap_to_ie(sband, pos, &left);
 817
 818         if (*pos > 0)
 819                 len += 2 + *pos;
 820         return (u16)len;
 821 }
 822
 823 /*
 824  * QoS  support
 825 */
 826 static int iwl4965_send_qos_params_command(struct iwl_priv *priv,
 827                                        struct iwl4965_qosparam_cmd *qos)
 828 {
 829
 830         return iwl_send_cmd_pdu(priv, REPLY_QOS_PARAM,
 831                                 sizeof(struct iwl4965_qosparam_cmd), qos);
 832 }
 833
 834 static void iwl4965_activate_qos(struct iwl_priv *priv, u8 force)
 835 {
 836         unsigned long flags;
 837
 838         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 839                 return;
 840
 841         if (!priv->qos_data.qos_enable)
 842                 return;
 843
 844         spin_lock_irqsave(&priv->lock, flags);
 845         priv->qos_data.def_qos_parm.qos_flags = 0;
 846
 847         if (priv->qos_data.qos_cap.q_AP.queue_request &&
 848             !priv->qos_data.qos_cap.q_AP.txop_request)
 849                 priv->qos_data.def_qos_parm.qos_flags |=
 850                         QOS_PARAM_FLG_TXOP_TYPE_MSK;
 851         if (priv->qos_data.qos_active)
 852                 priv->qos_data.def_qos_parm.qos_flags |=
 853                         QOS_PARAM_FLG_UPDATE_EDCA_MSK;
 854
 855         if (priv->current_ht_config.is_ht)
 856                 priv->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
 857
 858         spin_unlock_irqrestore(&priv->lock, flags);
 859
 860         if (force || iwl_is_associated(priv)) {
 861                 IWL_DEBUG_QOS("send QoS cmd with Qos active=%d FLAGS=0x%X\n",
 862                                 priv->qos_data.qos_active,
 863                                 priv->qos_data.def_qos_parm.qos_flags);
 864
 865                 iwl4965_send_qos_params_command(priv,
 866                                 &(priv->qos_data.def_qos_parm));
 867         }
 868 }
 869
 870 int iwl4965_is_network_packet(struct iwl_priv *priv, struct ieee80211_hdr *header)
 871 {
 872         /* Filter incoming packets to determine if they are targeted toward
 873          * this network, discarding packets coming from ourselves */
 874         switch (priv->iw_mode) {
 875         case IEEE80211_IF_TYPE_IBSS: /* Header: Dest. | Source    | BSSID */
 876                 /* packets from our adapter are dropped (echo) */
 877                 if (!compare_ether_addr(header->addr2, priv->mac_addr))
 878                         return 0;
 879                 /* {broad,multi}cast packets to our IBSS go through */
 880                 if (is_multicast_ether_addr(header->addr1))
 881                         return !compare_ether_addr(header->addr3, priv->bssid);
 882                 /* packets to our adapter go through */
 883                 return !compare_ether_addr(header->addr1, priv->mac_addr);
 884         case IEEE80211_IF_TYPE_STA: /* Header: Dest. | AP{BSSID} | Source */
 885                 /* packets from our adapter are dropped (echo) */
 886                 if (!compare_ether_addr(header->addr3, priv->mac_addr))
 887                         return 0;
 888                 /* {broad,multi}cast packets to our BSS go through */
 889                 if (is_multicast_ether_addr(header->addr1))
 890                         return !compare_ether_addr(header->addr2, priv->bssid);
 891                 /* packets to our adapter go through */
 892                 return !compare_ether_addr(header->addr1, priv->mac_addr);
 893         default:
 894                 break;
 895         }
 896
 897         return 1;
 898 }
 899
 900
 901
 902 /**
 903  * iwl4965_scan_cancel - Cancel any currently executing HW scan
 904  *
 905  * NOTE: priv->mutex is not required before calling this function
 906  */
 907 static int iwl4965_scan_cancel(struct iwl_priv *priv)
 908 {
 909         if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
 910                 clear_bit(STATUS_SCANNING, &priv->status);
 911                 return 0;
 912         }
 913
 914         if (test_bit(STATUS_SCANNING, &priv->status)) {
 915                 if (!test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
 916                         IWL_DEBUG_SCAN("Queuing scan abort.\n");
 917                         set_bit(STATUS_SCAN_ABORTING, &priv->status);
 918                         queue_work(priv->workqueue, &priv->abort_scan);
 919
 920                 } else
 921                         IWL_DEBUG_SCAN("Scan abort already in progress.\n");
 922
 923                 return test_bit(STATUS_SCANNING, &priv->status);
 924         }
 925
 926         return 0;
 927 }
 928
 929 /**
 930  * iwl4965_scan_cancel_timeout - Cancel any currently executing HW scan
 931  * @ms: amount of time to wait (in milliseconds) for scan to abort
 932  *
 933  * NOTE: priv->mutex must be held before calling this function
 934  */
 935 static int iwl4965_scan_cancel_timeout(struct iwl_priv *priv, unsigned long ms)
 936 {
 937         unsigned long now = jiffies;
 938         int ret;
 939
 940         ret = iwl4965_scan_cancel(priv);
 941         if (ret && ms) {
 942                 mutex_unlock(&priv->mutex);
 943                 while (!time_after(jiffies, now + msecs_to_jiffies(ms)) &&
 944                                 test_bit(STATUS_SCANNING, &priv->status))
 945                         msleep(1);
 946                 mutex_lock(&priv->mutex);
 947
 948                 return test_bit(STATUS_SCANNING, &priv->status);
 949         }
 950
 951         return ret;
 952 }
 953
 954 static void iwl4965_sequence_reset(struct iwl_priv *priv)
 955 {
 956         /* Reset ieee stats */
 957
 958         /* We don't reset the net_device_stats (ieee->stats) on
 959          * re-association */
 960
 961         priv->last_seq_num = -1;
 962         priv->last_frag_num = -1;
 963         priv->last_packet_time = 0;
 964
 965         iwl4965_scan_cancel(priv);
 966 }
 967
 968 #define MAX_UCODE_BEACON_INTERVAL       4096
 969 #define INTEL_CONN_LISTEN_INTERVAL      __constant_cpu_to_le16(0xA)
 970
 971 static __le16 iwl4965_adjust_beacon_interval(u16 beacon_val)
 972 {
 973         u16 new_val = 0;
 974         u16 beacon_factor = 0;
 975
 976         beacon_factor =
 977             (beacon_val + MAX_UCODE_BEACON_INTERVAL)
 978                 / MAX_UCODE_BEACON_INTERVAL;
 979         new_val = beacon_val / beacon_factor;
 980
 981         return cpu_to_le16(new_val);
 982 }
 983
 984 static void iwl4965_setup_rxon_timing(struct iwl_priv *priv)
 985 {
 986         u64 interval_tm_unit;
 987         u64 tsf, result;
 988         unsigned long flags;
 989         struct ieee80211_conf *conf = NULL;
 990         u16 beacon_int = 0;
 991
 992         conf = ieee80211_get_hw_conf(priv->hw);
 993
 994         spin_lock_irqsave(&priv->lock, flags);
 995         priv->rxon_timing.timestamp.dw[1] = cpu_to_le32(priv->timestamp >> 32);
 996         priv->rxon_timing.timestamp.dw[0] =
 997                                 cpu_to_le32(priv->timestamp & 0xFFFFFFFF);
 998
 999         priv->rxon_timing.listen_interval = INTEL_CONN_LISTEN_INTERVAL;
1000
1001         tsf = priv->timestamp;
1002
1003         beacon_int = priv->beacon_int;
1004         spin_unlock_irqrestore(&priv->lock, flags);
1005
1006         if (priv->iw_mode == IEEE80211_IF_TYPE_STA) {
1007                 if (beacon_int == 0) {
1008                         priv->rxon_timing.beacon_interval = cpu_to_le16(100);
1009                         priv->rxon_timing.beacon_init_val = cpu_to_le32(102400);
1010                 } else {
1011                         priv->rxon_timing.beacon_interval =
1012                                 cpu_to_le16(beacon_int);
1013                         priv->rxon_timing.beacon_interval =
1014                             iwl4965_adjust_beacon_interval(
1015                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
1016                 }
1017
1018                 priv->rxon_timing.atim_window = 0;
1019         } else {
1020                 priv->rxon_timing.beacon_interval =
1021                         iwl4965_adjust_beacon_interval(conf->beacon_int);
1022                 /* TODO: we need to get atim_window from upper stack
1023                  * for now we set to 0 */
1024                 priv->rxon_timing.atim_window = 0;
1025         }
1026
1027         interval_tm_unit =
1028                 (le16_to_cpu(priv->rxon_timing.beacon_interval) * 1024);
1029         result = do_div(tsf, interval_tm_unit);
1030         priv->rxon_timing.beacon_init_val =
1031             cpu_to_le32((u32) ((u64) interval_tm_unit - result));
1032
1033         IWL_DEBUG_ASSOC
1034             ("beacon interval %d beacon timer %d beacon tim %d\n",
1035                 le16_to_cpu(priv->rxon_timing.beacon_interval),
1036                 le32_to_cpu(priv->rxon_timing.beacon_init_val),
1037                 le16_to_cpu(priv->rxon_timing.atim_window));
1038 }
1039
1040 static int iwl4965_scan_initiate(struct iwl_priv *priv)
1041 {
1042         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
1043                 IWL_ERROR("APs don't scan.\n");
1044                 return 0;
1045         }
1046
1047         if (!iwl_is_ready_rf(priv)) {
1048                 IWL_DEBUG_SCAN("Aborting scan due to not ready.\n");
1049                 return -EIO;
1050         }
1051
1052         if (test_bit(STATUS_SCANNING, &priv->status)) {
1053                 IWL_DEBUG_SCAN("Scan already in progress.\n");
1054                 return -EAGAIN;
1055         }
1056
1057         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
1058                 IWL_DEBUG_SCAN("Scan request while abort pending.  "
1059                                "Queuing.\n");
1060                 return -EAGAIN;
1061         }
1062
1063         IWL_DEBUG_INFO("Starting scan...\n");
1064         priv->scan_bands = 2;
1065         set_bit(STATUS_SCANNING, &priv->status);
1066         priv->scan_start = jiffies;
1067         priv->scan_pass_start = priv->scan_start;
1068
1069         queue_work(priv->workqueue, &priv->request_scan);
1070
1071         return 0;
1072 }
1073
1074
1075 static void iwl_set_flags_for_band(struct iwl_priv *priv,
1076                                    enum ieee80211_band band)
1077 {
1078         if (band == IEEE80211_BAND_5GHZ) {
1079                 priv->staging_rxon.flags &=
1080                     ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
1081                       | RXON_FLG_CCK_MSK);
1082                 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
1083         } else {
1084                 /* Copied from iwl4965_post_associate() */
1085                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
1086                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
1087                 else
1088                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
1089
1090                 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
1091                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
1092
1093                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
1094                 priv->staging_rxon.flags |= RXON_FLG_AUTO_DETECT_MSK;
1095                 priv->staging_rxon.flags &= ~RXON_FLG_CCK_MSK;
1096         }
1097 }
1098
1099 /*
1100  * initialize rxon structure with default values from eeprom
1101  */
1102 static void iwl4965_connection_init_rx_config(struct iwl_priv *priv)
1103 {
1104         const struct iwl_channel_info *ch_info;
1105
1106         memset(&priv->staging_rxon, 0, sizeof(priv->staging_rxon));
1107
1108         switch (priv->iw_mode) {
1109         case IEEE80211_IF_TYPE_AP:
1110                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_AP;
1111                 break;
1112
1113         case IEEE80211_IF_TYPE_STA:
1114                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_ESS;
1115                 priv->staging_rxon.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
1116                 break;
1117
1118         case IEEE80211_IF_TYPE_IBSS:
1119                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_IBSS;
1120                 priv->staging_rxon.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
1121                 priv->staging_rxon.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
1122                                                   RXON_FILTER_ACCEPT_GRP_MSK;
1123                 break;
1124
1125         case IEEE80211_IF_TYPE_MNTR:
1126                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_SNIFFER;
1127                 priv->staging_rxon.filter_flags = RXON_FILTER_PROMISC_MSK |
1128                     RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_ACCEPT_GRP_MSK;
1129                 break;
1130         default:
1131                 IWL_ERROR("Unsupported interface type %d\n", priv->iw_mode);
1132                 break;
1133         }
1134
1135 #if 0
1136         /* TODO:  Figure out when short_preamble would be set and cache from
1137          * that */
1138         if (!hw_to_local(priv->hw)->short_preamble)
1139                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
1140         else
1141                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
1142 #endif
1143
1144         ch_info = iwl_get_channel_info(priv, priv->band,
1145                                        le16_to_cpu(priv->staging_rxon.channel));
1146
1147         if (!ch_info)
1148                 ch_info = &priv->channel_info[0];
1149
1150         /*
1151          * in some case A channels are all non IBSS
1152          * in this case force B/G channel
1153          */
1154         if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) &&
1155             !(is_channel_ibss(ch_info)))
1156                 ch_info = &priv->channel_info[0];
1157
1158         priv->staging_rxon.channel = cpu_to_le16(ch_info->channel);
1159         priv->band = ch_info->band;
1160
1161         iwl_set_flags_for_band(priv, priv->band);
1162
1163         priv->staging_rxon.ofdm_basic_rates =
1164             (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
1165         priv->staging_rxon.cck_basic_rates =
1166             (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
1167
1168         priv->staging_rxon.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED_MSK |
1169                                         RXON_FLG_CHANNEL_MODE_PURE_40_MSK);
1170         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
1171         memcpy(priv->staging_rxon.wlap_bssid_addr, priv->mac_addr, ETH_ALEN);
1172         priv->staging_rxon.ofdm_ht_single_stream_basic_rates = 0xff;
1173         priv->staging_rxon.ofdm_ht_dual_stream_basic_rates = 0xff;
1174         iwl_set_rxon_chain(priv);
1175 }
1176
1177 static int iwl4965_set_mode(struct iwl_priv *priv, int mode)
1178 {
1179         if (mode == IEEE80211_IF_TYPE_IBSS) {
1180                 const struct iwl_channel_info *ch_info;
1181
1182                 ch_info = iwl_get_channel_info(priv,
1183                         priv->band,
1184                         le16_to_cpu(priv->staging_rxon.channel));
1185
1186                 if (!ch_info || !is_channel_ibss(ch_info)) {
1187                         IWL_ERROR("channel %d not IBSS channel\n",
1188                                   le16_to_cpu(priv->staging_rxon.channel));
1189                         return -EINVAL;
1190                 }
1191         }
1192
1193         priv->iw_mode = mode;
1194
1195         iwl4965_connection_init_rx_config(priv);
1196         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
1197
1198         iwlcore_clear_stations_table(priv);
1199
1200         /* dont commit rxon if rf-kill is on*/
1201         if (!iwl_is_ready_rf(priv))
1202                 return -EAGAIN;
1203
1204         cancel_delayed_work(&priv->scan_check);
1205         if (iwl4965_scan_cancel_timeout(priv, 100)) {
1206                 IWL_WARNING("Aborted scan still in progress after 100ms\n");
1207                 IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
1208                 return -EAGAIN;
1209         }
1210
1211         iwl4965_commit_rxon(priv);
1212
1213         return 0;
1214 }
1215
1216 static void iwl4965_set_rate(struct iwl_priv *priv)
1217 {
1218         const struct ieee80211_supported_band *hw = NULL;
1219         struct ieee80211_rate *rate;
1220         int i;
1221
1222         hw = iwl_get_hw_mode(priv, priv->band);
1223         if (!hw) {
1224                 IWL_ERROR("Failed to set rate: unable to get hw mode\n");
1225                 return;
1226         }
1227
1228         priv->active_rate = 0;
1229         priv->active_rate_basic = 0;
1230
1231         for (i = 0; i < hw->n_bitrates; i++) {
1232                 rate = &(hw->bitrates[i]);
1233                 if (rate->hw_value < IWL_RATE_COUNT)
1234                         priv->active_rate |= (1 << rate->hw_value);
1235         }
1236
1237         IWL_DEBUG_RATE("Set active_rate = %0x, active_rate_basic = %0x\n",
1238                        priv->active_rate, priv->active_rate_basic);
1239
1240         /*
1241          * If a basic rate is configured, then use it (adding IWL_RATE_1M_MASK)
1242          * otherwise set it to the default of all CCK rates and 6, 12, 24 for
1243          * OFDM
1244          */
1245         if (priv->active_rate_basic & IWL_CCK_BASIC_RATES_MASK)
1246                 priv->staging_rxon.cck_basic_rates =
1247                     ((priv->active_rate_basic &
1248                       IWL_CCK_RATES_MASK) >> IWL_FIRST_CCK_RATE) & 0xF;
1249         else
1250                 priv->staging_rxon.cck_basic_rates =
1251                     (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
1252
1253         if (priv->active_rate_basic & IWL_OFDM_BASIC_RATES_MASK)
1254                 priv->staging_rxon.ofdm_basic_rates =
1255                     ((priv->active_rate_basic &
1256                       (IWL_OFDM_BASIC_RATES_MASK | IWL_RATE_6M_MASK)) >>
1257                       IWL_FIRST_OFDM_RATE) & 0xFF;
1258         else
1259                 priv->staging_rxon.ofdm_basic_rates =
1260                    (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
1261 }
1262
1263 int iwl4965_radio_kill_sw(struct iwl_priv *priv, int disable_radio)
1264 {
1265         unsigned long flags;
1266
1267         if (!!disable_radio == test_bit(STATUS_RF_KILL_SW, &priv->status))
1268                 return 0;
1269
1270         IWL_DEBUG_RF_KILL("Manual SW RF KILL set to: RADIO %s\n",
1271                           disable_radio ? "OFF" : "ON");
1272
1273         if (disable_radio) {
1274                 iwl4965_scan_cancel(priv);
1275                 /* FIXME: This is a workaround for AP */
1276                 if (priv->iw_mode != IEEE80211_IF_TYPE_AP) {
1277                         spin_lock_irqsave(&priv->lock, flags);
1278                         iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
1279                                     CSR_UCODE_SW_BIT_RFKILL);
1280                         spin_unlock_irqrestore(&priv->lock, flags);
1281                         /* call the host command only if no hw rf-kill set */
1282                         if (!test_bit(STATUS_RF_KILL_HW, &priv->status) &&
1283                             iwl_is_ready(priv))
1284                                 iwl4965_send_card_state(priv,
1285                                                         CARD_STATE_CMD_DISABLE,
1286                                                         0);
1287                         set_bit(STATUS_RF_KILL_SW, &priv->status);
1288
1289                         /* make sure mac80211 stop sending Tx frame */
1290                         if (priv->mac80211_registered)
1291                                 ieee80211_stop_queues(priv->hw);
1292                 }
1293                 return 0;
1294         }
1295
1296         spin_lock_irqsave(&priv->lock, flags);
1297         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
1298
1299         clear_bit(STATUS_RF_KILL_SW, &priv->status);
1300         spin_unlock_irqrestore(&priv->lock, flags);
1301
1302         /* wake up ucode */
1303         msleep(10);
1304
1305         spin_lock_irqsave(&priv->lock, flags);
1306         iwl_read32(priv, CSR_UCODE_DRV_GP1);
1307         if (!iwl_grab_nic_access(priv))
1308                 iwl_release_nic_access(priv);
1309         spin_unlock_irqrestore(&priv->lock, flags);
1310
1311         if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
1312                 IWL_DEBUG_RF_KILL("Can not turn radio back on - "
1313                                   "disabled by HW switch\n");
1314                 return 0;
1315         }
1316
1317         queue_work(priv->workqueue, &priv->restart);
1318         return 1;
1319 }
1320
1321 #define IWL_PACKET_RETRY_TIME HZ
1322
1323 int iwl4965_is_duplicate_packet(struct iwl_priv *priv, struct ieee80211_hdr *header)
1324 {
1325         u16 sc = le16_to_cpu(header->seq_ctrl);
1326         u16 seq = (sc & IEEE80211_SCTL_SEQ) >> 4;
1327         u16 frag = sc & IEEE80211_SCTL_FRAG;
1328         u16 *last_seq, *last_frag;
1329         unsigned long *last_time;
1330
1331         switch (priv->iw_mode) {
1332         case IEEE80211_IF_TYPE_IBSS:{
1333                 struct list_head *p;
1334                 struct iwl4965_ibss_seq *entry = NULL;
1335                 u8 *mac = header->addr2;
1336                 int index = mac[5] & (IWL_IBSS_MAC_HASH_SIZE - 1);
1337
1338                 __list_for_each(p, &priv->ibss_mac_hash[index]) {
1339                         entry = list_entry(p, struct iwl4965_ibss_seq, list);
1340                         if (!compare_ether_addr(entry->mac, mac))
1341                                 break;
1342                 }
1343                 if (p == &priv->ibss_mac_hash[index]) {
1344                         entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
1345                         if (!entry) {
1346                                 IWL_ERROR("Cannot malloc new mac entry\n");
1347                                 return 0;
1348                         }
1349                         memcpy(entry->mac, mac, ETH_ALEN);
1350                         entry->seq_num = seq;
1351                         entry->frag_num = frag;
1352                         entry->packet_time = jiffies;
1353                         list_add(&entry->list, &priv->ibss_mac_hash[index]);
1354                         return 0;
1355                 }
1356                 last_seq = &entry->seq_num;
1357                 last_frag = &entry->frag_num;
1358                 last_time = &entry->packet_time;
1359                 break;
1360         }
1361         case IEEE80211_IF_TYPE_STA:
1362                 last_seq = &priv->last_seq_num;
1363                 last_frag = &priv->last_frag_num;
1364                 last_time = &priv->last_packet_time;
1365                 break;
1366         default:
1367                 return 0;
1368         }
1369         if ((*last_seq == seq) &&
1370             time_after(*last_time + IWL_PACKET_RETRY_TIME, jiffies)) {
1371                 if (*last_frag == frag)
1372                         goto drop;
1373                 if (*last_frag + 1 != frag)
1374                         /* out-of-order fragment */
1375                         goto drop;
1376         } else
1377                 *last_seq = seq;
1378
1379         *last_frag = frag;
1380         *last_time = jiffies;
1381         return 0;
1382
1383  drop:
1384         return 1;
1385 }
1386
1387 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
1388
1389 #include "iwl-spectrum.h"
1390
1391 #define BEACON_TIME_MASK_LOW    0x00FFFFFF
1392 #define BEACON_TIME_MASK_HIGH   0xFF000000
1393 #define TIME_UNIT               1024
1394
1395 /*
1396  * extended beacon time format
1397  * time in usec will be changed into a 32-bit value in 8:24 format
1398  * the high 1 byte is the beacon counts
1399  * the lower 3 bytes is the time in usec within one beacon interval
1400  */
1401
1402 static u32 iwl4965_usecs_to_beacons(u32 usec, u32 beacon_interval)
1403 {
1404         u32 quot;
1405         u32 rem;
1406         u32 interval = beacon_interval * 1024;
1407
1408         if (!interval || !usec)
1409                 return 0;
1410
1411         quot = (usec / interval) & (BEACON_TIME_MASK_HIGH >> 24);
1412         rem = (usec % interval) & BEACON_TIME_MASK_LOW;
1413
1414         return (quot << 24) + rem;
1415 }
1416
1417 /* base is usually what we get from ucode with each received frame,
1418  * the same as HW timer counter counting down
1419  */
1420
1421 static __le32 iwl4965_add_beacon_time(u32 base, u32 addon, u32 beacon_interval)
1422 {
1423         u32 base_low = base & BEACON_TIME_MASK_LOW;
1424         u32 addon_low = addon & BEACON_TIME_MASK_LOW;
1425         u32 interval = beacon_interval * TIME_UNIT;
1426         u32 res = (base & BEACON_TIME_MASK_HIGH) +
1427             (addon & BEACON_TIME_MASK_HIGH);
1428
1429         if (base_low > addon_low)
1430                 res += base_low - addon_low;
1431         else if (base_low < addon_low) {
1432                 res += interval + base_low - addon_low;
1433                 res += (1 << 24);
1434         } else
1435                 res += (1 << 24);
1436
1437         return cpu_to_le32(res);
1438 }
1439
1440 static int iwl4965_get_measurement(struct iwl_priv *priv,
1441                                struct ieee80211_measurement_params *params,
1442                                u8 type)
1443 {
1444         struct iwl4965_spectrum_cmd spectrum;
1445         struct iwl_rx_packet *res;
1446         struct iwl_host_cmd cmd = {
1447                 .id = REPLY_SPECTRUM_MEASUREMENT_CMD,
1448                 .data = (void *)&spectrum,
1449                 .meta.flags = CMD_WANT_SKB,
1450         };
1451         u32 add_time = le64_to_cpu(params->start_time);
1452         int rc;
1453         int spectrum_resp_status;
1454         int duration = le16_to_cpu(params->duration);
1455
1456         if (iwl_is_associated(priv))
1457                 add_time =
1458                     iwl4965_usecs_to_beacons(
1459                         le64_to_cpu(params->start_time) - priv->last_tsf,
1460                         le16_to_cpu(priv->rxon_timing.beacon_interval));
1461
1462         memset(&spectrum, 0, sizeof(spectrum));
1463
1464         spectrum.channel_count = cpu_to_le16(1);
1465         spectrum.flags =
1466             RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
1467         spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
1468         cmd.len = sizeof(spectrum);
1469         spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
1470
1471         if (iwl_is_associated(priv))
1472                 spectrum.start_time =
1473                     iwl4965_add_beacon_time(priv->last_beacon_time,
1474                                 add_time,
1475                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
1476         else
1477                 spectrum.start_time = 0;
1478
1479         spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
1480         spectrum.channels[0].channel = params->channel;
1481         spectrum.channels[0].type = type;
1482         if (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK)
1483                 spectrum.flags |= RXON_FLG_BAND_24G_MSK |
1484                     RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK;
1485
1486         rc = iwl_send_cmd_sync(priv, &cmd);
1487         if (rc)
1488                 return rc;
1489
1490         res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
1491         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1492                 IWL_ERROR("Bad return from REPLY_RX_ON_ASSOC command\n");
1493                 rc = -EIO;
1494         }
1495
1496         spectrum_resp_status = le16_to_cpu(res->u.spectrum.status);
1497         switch (spectrum_resp_status) {
1498         case 0:         /* Command will be handled */
1499                 if (res->u.spectrum.id != 0xff) {
1500                         IWL_DEBUG_INFO
1501                             ("Replaced existing measurement: %d\n",
1502                              res->u.spectrum.id);
1503                         priv->measurement_status &= ~MEASUREMENT_READY;
1504                 }
1505                 priv->measurement_status |= MEASUREMENT_ACTIVE;
1506                 rc = 0;
1507                 break;
1508
1509         case 1:         /* Command will not be handled */
1510                 rc = -EAGAIN;
1511                 break;
1512         }
1513
1514         dev_kfree_skb_any(cmd.meta.u.skb);
1515
1516         return rc;
1517 }
1518 #endif
1519
1520 /******************************************************************************
1521  *
1522  * Generic RX handler implementations
1523  *
1524  ******************************************************************************/
1525 static void iwl_rx_reply_alive(struct iwl_priv *priv,
1526                                 struct iwl_rx_mem_buffer *rxb)
1527 {
1528         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
1529         struct iwl_alive_resp *palive;
1530         struct delayed_work *pwork;
1531
1532         palive = &pkt->u.alive_frame;
1533
1534         IWL_DEBUG_INFO("Alive ucode status 0x%08X revision "
1535                        "0x%01X 0x%01X\n",
1536                        palive->is_valid, palive->ver_type,
1537                        palive->ver_subtype);
1538
1539         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
1540                 IWL_DEBUG_INFO("Initialization Alive received.\n");
1541                 memcpy(&priv->card_alive_init,
1542                        &pkt->u.alive_frame,
1543                        sizeof(struct iwl_init_alive_resp));
1544                 pwork = &priv->init_alive_start;
1545         } else {
1546                 IWL_DEBUG_INFO("Runtime Alive received.\n");
1547                 memcpy(&priv->card_alive, &pkt->u.alive_frame,
1548                        sizeof(struct iwl_alive_resp));
1549                 pwork = &priv->alive_start;
1550         }
1551
1552         /* We delay the ALIVE response by 5ms to
1553          * give the HW RF Kill time to activate... */
1554         if (palive->is_valid == UCODE_VALID_OK)
1555                 queue_delayed_work(priv->workqueue, pwork,
1556                                    msecs_to_jiffies(5));
1557         else
1558                 IWL_WARNING("uCode did not respond OK.\n");
1559 }
1560
1561 static void iwl4965_rx_reply_error(struct iwl_priv *priv,
1562                                    struct iwl_rx_mem_buffer *rxb)
1563 {
1564         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
1565
1566         IWL_ERROR("Error Reply type 0x%08X cmd %s (0x%02X) "
1567                 "seq 0x%04X ser 0x%08X\n",
1568                 le32_to_cpu(pkt->u.err_resp.error_type),
1569                 get_cmd_string(pkt->u.err_resp.cmd_id),
1570                 pkt->u.err_resp.cmd_id,
1571                 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
1572                 le32_to_cpu(pkt->u.err_resp.error_info));
1573 }
1574
1575 #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
1576
1577 static void iwl4965_rx_csa(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
1578 {
1579         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
1580         struct iwl_rxon_cmd *rxon = (void *)&priv->active_rxon;
1581         struct iwl4965_csa_notification *csa = &(pkt->u.csa_notif);
1582         IWL_DEBUG_11H("CSA notif: channel %d, status %d\n",
1583                       le16_to_cpu(csa->channel), le32_to_cpu(csa->status));
1584         rxon->channel = csa->channel;
1585         priv->staging_rxon.channel = csa->channel;
1586 }
1587
1588 static void iwl4965_rx_spectrum_measure_notif(struct iwl_priv *priv,
1589                                           struct iwl_rx_mem_buffer *rxb)
1590 {
1591 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
1592         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
1593         struct iwl4965_spectrum_notification *report = &(pkt->u.spectrum_notif);
1594
1595         if (!report->state) {
1596                 IWL_DEBUG(IWL_DL_11H,
1597                         "Spectrum Measure Notification: Start\n");
1598                 return;
1599         }
1600
1601         memcpy(&priv->measure_report, report, sizeof(*report));
1602         priv->measurement_status |= MEASUREMENT_READY;
1603 #endif
1604 }
1605
1606 static void iwl4965_rx_pm_sleep_notif(struct iwl_priv *priv,
1607                                       struct iwl_rx_mem_buffer *rxb)
1608 {
1609 #ifdef CONFIG_IWLWIFI_DEBUG
1610         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
1611         struct iwl4965_sleep_notification *sleep = &(pkt->u.sleep_notif);
1612         IWL_DEBUG_RX("sleep mode: %d, src: %d\n",
1613                      sleep->pm_sleep_mode, sleep->pm_wakeup_src);
1614 #endif
1615 }
1616
1617 static void iwl4965_rx_pm_debug_statistics_notif(struct iwl_priv *priv,
1618                                              struct iwl_rx_mem_buffer *rxb)
1619 {
1620         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
1621         IWL_DEBUG_RADIO("Dumping %d bytes of unhandled "
1622                         "notification for %s:\n",
1623                         le32_to_cpu(pkt->len), get_cmd_string(pkt->hdr.cmd));
1624         iwl_print_hex_dump(priv, IWL_DL_RADIO, pkt->u.raw, le32_to_cpu(pkt->len));
1625 }
1626
1627 static void iwl4965_bg_beacon_update(struct work_struct *work)
1628 {
1629         struct iwl_priv *priv =
1630                 container_of(work, struct iwl_priv, beacon_update);
1631         struct sk_buff *beacon;
1632
1633         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
1634         beacon = ieee80211_beacon_get(priv->hw, priv->vif);
1635
1636         if (!beacon) {
1637                 IWL_ERROR("update beacon failed\n");
1638                 return;
1639         }
1640
1641         mutex_lock(&priv->mutex);
1642         /* new beacon skb is allocated every time; dispose previous.*/
1643         if (priv->ibss_beacon)
1644                 dev_kfree_skb(priv->ibss_beacon);
1645
1646         priv->ibss_beacon = beacon;
1647         mutex_unlock(&priv->mutex);
1648
1649         iwl4965_send_beacon_cmd(priv);
1650 }
1651
1652 /**
1653  * iwl4965_bg_statistics_periodic - Timer callback to queue statistics
1654  *
1655  * This callback is provided in order to send a statistics request.
1656  *
1657  * This timer function is continually reset to execute within
1658  * REG_RECALIB_PERIOD seconds since the last STATISTICS_NOTIFICATION
1659  * was received.  We need to ensure we receive the statistics in order
1660  * to update the temperature used for calibrating the TXPOWER.
1661  */
1662 static void iwl4965_bg_statistics_periodic(unsigned long data)
1663 {
1664         struct iwl_priv *priv = (struct iwl_priv *)data;
1665
1666         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1667                 return;
1668
1669         iwl_send_statistics_request(priv, CMD_ASYNC);
1670 }
1671
1672 static void iwl4965_rx_beacon_notif(struct iwl_priv *priv,
1673                                 struct iwl_rx_mem_buffer *rxb)
1674 {
1675 #ifdef CONFIG_IWLWIFI_DEBUG
1676         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
1677         struct iwl4965_beacon_notif *beacon = &(pkt->u.beacon_status);
1678         u8 rate = iwl4965_hw_get_rate(beacon->beacon_notify_hdr.rate_n_flags);
1679
1680         IWL_DEBUG_RX("beacon status %x retries %d iss %d "
1681                 "tsf %d %d rate %d\n",
1682                 le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
1683                 beacon->beacon_notify_hdr.failure_frame,
1684                 le32_to_cpu(beacon->ibss_mgr_status),
1685                 le32_to_cpu(beacon->high_tsf),
1686                 le32_to_cpu(beacon->low_tsf), rate);
1687 #endif
1688
1689         if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
1690             (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
1691                 queue_work(priv->workqueue, &priv->beacon_update);
1692 }
1693
1694 /* Service response to REPLY_SCAN_CMD (0x80) */
1695 static void iwl4965_rx_reply_scan(struct iwl_priv *priv,
1696                               struct iwl_rx_mem_buffer *rxb)
1697 {
1698 #ifdef CONFIG_IWLWIFI_DEBUG
1699         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
1700         struct iwl4965_scanreq_notification *notif =
1701             (struct iwl4965_scanreq_notification *)pkt->u.raw;
1702
1703         IWL_DEBUG_RX("Scan request status = 0x%x\n", notif->status);
1704 #endif
1705 }
1706
1707 /* Service SCAN_START_NOTIFICATION (0x82) */
1708 static void iwl4965_rx_scan_start_notif(struct iwl_priv *priv,
1709                                     struct iwl_rx_mem_buffer *rxb)
1710 {
1711         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
1712         struct iwl4965_scanstart_notification *notif =
1713             (struct iwl4965_scanstart_notification *)pkt->u.raw;
1714         priv->scan_start_tsf = le32_to_cpu(notif->tsf_low);
1715         IWL_DEBUG_SCAN("Scan start: "
1716                        "%d [802.11%s] "
1717                        "(TSF: 0x%08X:%08X) - %d (beacon timer %u)\n",
1718                        notif->channel,
1719                        notif->band ? "bg" : "a",
1720                        notif->tsf_high,
1721                        notif->tsf_low, notif->status, notif->beacon_timer);
1722 }
1723
1724 /* Service SCAN_RESULTS_NOTIFICATION (0x83) */
1725 static void iwl4965_rx_scan_results_notif(struct iwl_priv *priv,
1726                                       struct iwl_rx_mem_buffer *rxb)
1727 {
1728         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
1729         struct iwl4965_scanresults_notification *notif =
1730             (struct iwl4965_scanresults_notification *)pkt->u.raw;
1731
1732         IWL_DEBUG_SCAN("Scan ch.res: "
1733                        "%d [802.11%s] "
1734                        "(TSF: 0x%08X:%08X) - %d "
1735                        "elapsed=%lu usec (%dms since last)\n",
1736                        notif->channel,
1737                        notif->band ? "bg" : "a",
1738                        le32_to_cpu(notif->tsf_high),
1739                        le32_to_cpu(notif->tsf_low),
1740                        le32_to_cpu(notif->statistics[0]),
1741                        le32_to_cpu(notif->tsf_low) - priv->scan_start_tsf,
1742                        jiffies_to_msecs(elapsed_jiffies
1743                                         (priv->last_scan_jiffies, jiffies)));
1744
1745         priv->last_scan_jiffies = jiffies;
1746         priv->next_scan_jiffies = 0;
1747 }
1748
1749 /* Service SCAN_COMPLETE_NOTIFICATION (0x84) */
1750 static void iwl4965_rx_scan_complete_notif(struct iwl_priv *priv,
1751                                        struct iwl_rx_mem_buffer *rxb)
1752 {
1753         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
1754         struct iwl4965_scancomplete_notification *scan_notif = (void *)pkt->u.raw;
1755
1756         IWL_DEBUG_SCAN("Scan complete: %d channels (TSF 0x%08X:%08X) - %d\n",
1757                        scan_notif->scanned_channels,
1758                        scan_notif->tsf_low,
1759                        scan_notif->tsf_high, scan_notif->status);
1760
1761         /* The HW is no longer scanning */
1762         clear_bit(STATUS_SCAN_HW, &priv->status);
1763
1764         /* The scan completion notification came in, so kill that timer... */
1765         cancel_delayed_work(&priv->scan_check);
1766
1767         IWL_DEBUG_INFO("Scan pass on %sGHz took %dms\n",
1768                        (priv->scan_bands == 2) ? "2.4" : "5.2",
1769                        jiffies_to_msecs(elapsed_jiffies
1770                                         (priv->scan_pass_start, jiffies)));
1771
1772         /* Remove this scanned band from the list
1773          * of pending bands to scan */
1774         priv->scan_bands--;
1775
1776         /* If a request to abort was given, or the scan did not succeed
1777          * then we reset the scan state machine and terminate,
1778          * re-queuing another scan if one has been requested */
1779         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
1780                 IWL_DEBUG_INFO("Aborted scan completed.\n");
1781                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1782         } else {
1783                 /* If there are more bands on this scan pass reschedule */
1784                 if (priv->scan_bands > 0)
1785                         goto reschedule;
1786         }
1787
1788         priv->last_scan_jiffies = jiffies;
1789         priv->next_scan_jiffies = 0;
1790         IWL_DEBUG_INFO("Setting scan to off\n");
1791
1792         clear_bit(STATUS_SCANNING, &priv->status);
1793
1794         IWL_DEBUG_INFO("Scan took %dms\n",
1795                 jiffies_to_msecs(elapsed_jiffies(priv->scan_start, jiffies)));
1796
1797         queue_work(priv->workqueue, &priv->scan_completed);
1798
1799         return;
1800
1801 reschedule:
1802         priv->scan_pass_start = jiffies;
1803         queue_work(priv->workqueue, &priv->request_scan);
1804 }
1805
1806 /* Handle notification from uCode that card's power state is changing
1807  * due to software, hardware, or critical temperature RFKILL */
1808 static void iwl4965_rx_card_state_notif(struct iwl_priv *priv,
1809                                     struct iwl_rx_mem_buffer *rxb)
1810 {
1811         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
1812         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
1813         unsigned long status = priv->status;
1814
1815         IWL_DEBUG_RF_KILL("Card state received: HW:%s SW:%s\n",
1816                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
1817                           (flags & SW_CARD_DISABLED) ? "Kill" : "On");
1818
1819         if (flags & (SW_CARD_DISABLED | HW_CARD_DISABLED |
1820                      RF_CARD_DISABLED)) {
1821
1822                 iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
1823                             CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
1824
1825                 if (!iwl_grab_nic_access(priv)) {
1826                         iwl_write_direct32(
1827                                 priv, HBUS_TARG_MBX_C,
1828                                 HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
1829
1830                         iwl_release_nic_access(priv);
1831                 }
1832
1833                 if (!(flags & RXON_CARD_DISABLED)) {
1834                         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
1835                                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
1836                         if (!iwl_grab_nic_access(priv)) {
1837                                 iwl_write_direct32(
1838                                         priv, HBUS_TARG_MBX_C,
1839                                         HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
1840
1841                                 iwl_release_nic_access(priv);
1842                         }
1843                 }
1844
1845                 if (flags & RF_CARD_DISABLED) {
1846                         iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
1847                                     CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
1848                         iwl_read32(priv, CSR_UCODE_DRV_GP1);
1849                         if (!iwl_grab_nic_access(priv))
1850                                 iwl_release_nic_access(priv);
1851                 }
1852         }
1853
1854         if (flags & HW_CARD_DISABLED)
1855                 set_bit(STATUS_RF_KILL_HW, &priv->status);
1856         else
1857                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
1858
1859
1860         if (flags & SW_CARD_DISABLED)
1861                 set_bit(STATUS_RF_KILL_SW, &priv->status);
1862         else
1863                 clear_bit(STATUS_RF_KILL_SW, &priv->status);
1864
1865         if (!(flags & RXON_CARD_DISABLED))
1866                 iwl4965_scan_cancel(priv);
1867
1868         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
1869              test_bit(STATUS_RF_KILL_HW, &priv->status)) ||
1870             (test_bit(STATUS_RF_KILL_SW, &status) !=
1871              test_bit(STATUS_RF_KILL_SW, &priv->status)))
1872                 queue_work(priv->workqueue, &priv->rf_kill);
1873         else
1874                 wake_up_interruptible(&priv->wait_command_queue);
1875 }
1876
1877 /* Cache phy data (Rx signal strength, etc) for HT frame (REPLY_RX_PHY_CMD).
1878  * This will be used later in iwl4965_rx_reply_rx() for REPLY_RX_MPDU_CMD. */
1879 static void iwl4965_rx_reply_rx_phy(struct iwl_priv *priv,
1880                                     struct iwl_rx_mem_buffer *rxb)
1881 {
1882         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
1883         priv->last_phy_res[0] = 1;
1884         memcpy(&priv->last_phy_res[1], &(pkt->u.raw[0]),
1885                sizeof(struct iwl4965_rx_phy_res));
1886 }
1887
1888 /**
1889  * iwl4965_setup_rx_handlers - Initialize Rx handler callbacks
1890  *
1891  * Setup the RX handlers for each of the reply types sent from the uCode
1892  * to the host.
1893  *
1894  * This function chains into the hardware specific files for them to setup
1895  * any hardware specific handlers as well.
1896  */
1897 static void iwl4965_setup_rx_handlers(struct iwl_priv *priv)
1898 {
1899         priv->rx_handlers[REPLY_ALIVE] = iwl_rx_reply_alive;
1900         priv->rx_handlers[REPLY_ERROR] = iwl4965_rx_reply_error;
1901         priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl4965_rx_csa;
1902         priv->rx_handlers[SPECTRUM_MEASURE_NOTIFICATION] =
1903             iwl4965_rx_spectrum_measure_notif;
1904         priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl4965_rx_pm_sleep_notif;
1905         priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
1906             iwl4965_rx_pm_debug_statistics_notif;
1907         priv->rx_handlers[BEACON_NOTIFICATION] = iwl4965_rx_beacon_notif;
1908
1909         /*
1910          * The same handler is used for both the REPLY to a discrete
1911          * statistics request from the host as well as for the periodic
1912          * statistics notifications (after received beacons) from the uCode.
1913          */
1914         priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl4965_hw_rx_statistics;
1915         priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl4965_hw_rx_statistics;
1916         /* scan handlers */
1917         priv->rx_handlers[REPLY_SCAN_CMD] = iwl4965_rx_reply_scan;
1918         priv->rx_handlers[SCAN_START_NOTIFICATION] = iwl4965_rx_scan_start_notif;
1919         priv->rx_handlers[SCAN_RESULTS_NOTIFICATION] =
1920             iwl4965_rx_scan_results_notif;
1921         priv->rx_handlers[SCAN_COMPLETE_NOTIFICATION] =
1922             iwl4965_rx_scan_complete_notif;
1923         /* status change handler */
1924         priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl4965_rx_card_state_notif;
1925
1926         priv->rx_handlers[MISSED_BEACONS_NOTIFICATION] =
1927             iwl_rx_missed_beacon_notif;
1928         /* Rx handlers */
1929         priv->rx_handlers[REPLY_RX_PHY_CMD] = iwl4965_rx_reply_rx_phy;
1930         priv->rx_handlers[REPLY_RX_MPDU_CMD] = iwl4965_rx_reply_rx;
1931         /* Set up hardware specific Rx handlers */
1932         priv->cfg->ops->lib->rx_handler_setup(priv);
1933 }
1934
1935 /*
1936  * this should be called while priv->lock is locked
1937 */
1938 static void __iwl_rx_replenish(struct iwl_priv *priv)
1939 {
1940         iwl_rx_allocate(priv);
1941         iwl_rx_queue_restock(priv);
1942 }
1943
1944
1945 /**
1946  * iwl_rx_handle - Main entry function for receiving responses from uCode
1947  *
1948  * Uses the priv->rx_handlers callback function array to invoke
1949  * the appropriate handlers, including command responses,
1950  * frame-received notifications, and other notifications.
1951  */
1952 void iwl_rx_handle(struct iwl_priv *priv)
1953 {
1954         struct iwl_rx_mem_buffer *rxb;
1955         struct iwl_rx_packet *pkt;
1956         struct iwl_rx_queue *rxq = &priv->rxq;
1957         u32 r, i;
1958         int reclaim;
1959         unsigned long flags;
1960         u8 fill_rx = 0;
1961         u32 count = 8;
1962
1963         /* uCode's read index (stored in shared DRAM) indicates the last Rx
1964          * buffer that the driver may process (last buffer filled by ucode). */
1965         r = priv->cfg->ops->lib->shared_mem_rx_idx(priv);
1966         i = rxq->read;
1967
1968         /* Rx interrupt, but nothing sent from uCode */
1969         if (i == r)
1970                 IWL_DEBUG(IWL_DL_RX, "r = %d, i = %d\n", r, i);
1971
1972         if (iwl_rx_queue_space(rxq) > (RX_QUEUE_SIZE / 2))
1973                 fill_rx = 1;
1974
1975         while (i != r) {
1976                 rxb = rxq->queue[i];
1977
1978                 /* If an RXB doesn't have a Rx queue slot associated with it,
1979                  * then a bug has been introduced in the queue refilling
1980                  * routines -- catch it here */
1981                 BUG_ON(rxb == NULL);
1982
1983                 rxq->queue[i] = NULL;
1984
1985                 pci_dma_sync_single_for_cpu(priv->pci_dev, rxb->dma_addr,
1986                                             priv->hw_params.rx_buf_size,
1987                                             PCI_DMA_FROMDEVICE);
1988                 pkt = (struct iwl_rx_packet *)rxb->skb->data;
1989
1990                 /* Reclaim a command buffer only if this packet is a response
1991                  *   to a (driver-originated) command.
1992                  * If the packet (e.g. Rx frame) originated from uCode,
1993                  *   there is no command buffer to reclaim.
1994                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
1995                  *   but apparently a few don't get set; catch them here. */
1996                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
1997                         (pkt->hdr.cmd != REPLY_RX_PHY_CMD) &&
1998                         (pkt->hdr.cmd != REPLY_RX) &&
1999                         (pkt->hdr.cmd != REPLY_COMPRESSED_BA) &&
2000                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
2001                         (pkt->hdr.cmd != REPLY_TX);
2002
2003                 /* Based on type of command response or notification,
2004                  *   handle those that need handling via function in
2005                  *   rx_handlers table.  See iwl4965_setup_rx_handlers() */
2006                 if (priv->rx_handlers[pkt->hdr.cmd]) {
2007                         IWL_DEBUG(IWL_DL_RX, "r = %d, i = %d, %s, 0x%02x\n", r,
2008                                 i, get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
2009                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
2010                 } else {
2011                         /* No handling needed */
2012                         IWL_DEBUG(IWL_DL_RX,
2013                                 "r %d i %d No handler needed for %s, 0x%02x\n",
2014                                 r, i, get_cmd_string(pkt->hdr.cmd),
2015                                 pkt->hdr.cmd);
2016                 }
2017
2018                 if (reclaim) {
2019                         /* Invoke any callbacks, transfer the skb to caller, and
2020                          * fire off the (possibly) blocking iwl_send_cmd()
2021                          * as we reclaim the driver command queue */
2022                         if (rxb && rxb->skb)
2023                                 iwl_tx_cmd_complete(priv, rxb);
2024                         else
2025                                 IWL_WARNING("Claim null rxb?\n");
2026                 }
2027
2028                 /* For now we just don't re-use anything.  We can tweak this
2029                  * later to try and re-use notification packets and SKBs that
2030                  * fail to Rx correctly */
2031                 if (rxb->skb != NULL) {
2032                         priv->alloc_rxb_skb--;
2033                         dev_kfree_skb_any(rxb->skb);
2034                         rxb->skb = NULL;
2035                 }
2036
2037                 pci_unmap_single(priv->pci_dev, rxb->dma_addr,
2038                                  priv->hw_params.rx_buf_size,
2039                                  PCI_DMA_FROMDEVICE);
2040                 spin_lock_irqsave(&rxq->lock, flags);
2041                 list_add_tail(&rxb->list, &priv->rxq.rx_used);
2042                 spin_unlock_irqrestore(&rxq->lock, flags);
2043                 i = (i + 1) & RX_QUEUE_MASK;
2044                 /* If there are a lot of unused frames,
2045                  * restock the Rx queue so ucode wont assert. */
2046                 if (fill_rx) {
2047                         count++;
2048                         if (count >= 8) {
2049                                 priv->rxq.read = i;
2050                                 __iwl_rx_replenish(priv);
2051                                 count = 0;
2052                         }
2053                 }
2054         }
2055
2056         /* Backtrack one entry */
2057         priv->rxq.read = i;
2058         iwl_rx_queue_restock(priv);
2059 }
2060 /* Convert linear signal-to-noise ratio into dB */
2061 static u8 ratio2dB[100] = {
2062 /*       0   1   2   3   4   5   6   7   8   9 */
2063          0,  0,  6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
2064         20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
2065         26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
2066         29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
2067         32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
2068         34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
2069         36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
2070         37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
2071         38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
2072         39, 39, 39, 39, 39, 40, 40, 40, 40, 40  /* 90 - 99 */
2073 };
2074
2075 /* Calculates a relative dB value from a ratio of linear
2076  *   (i.e. not dB) signal levels.
2077  * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
2078 int iwl4965_calc_db_from_ratio(int sig_ratio)
2079 {
2080         /* 1000:1 or higher just report as 60 dB */
2081         if (sig_ratio >= 1000)
2082                 return 60;
2083
2084         /* 100:1 or higher, divide by 10 and use table,
2085          *   add 20 dB to make up for divide by 10 */
2086         if (sig_ratio >= 100)
2087                 return (20 + (int)ratio2dB[sig_ratio/10]);
2088
2089         /* We shouldn't see this */
2090         if (sig_ratio < 1)
2091                 return 0;
2092
2093         /* Use table for ratios 1:1 - 99:1 */
2094         return (int)ratio2dB[sig_ratio];
2095 }
2096
2097 #define PERFECT_RSSI (-20) /* dBm */
2098 #define WORST_RSSI (-95)   /* dBm */
2099 #define RSSI_RANGE (PERFECT_RSSI - WORST_RSSI)
2100
2101 /* Calculate an indication of rx signal quality (a percentage, not dBm!).
2102  * See http://www.ces.clemson.edu/linux/signal_quality.shtml for info
2103  *   about formulas used below. */
2104 int iwl4965_calc_sig_qual(int rssi_dbm, int noise_dbm)
2105 {
2106         int sig_qual;
2107         int degradation = PERFECT_RSSI - rssi_dbm;
2108
2109         /* If we get a noise measurement, use signal-to-noise ratio (SNR)
2110          * as indicator; formula is (signal dbm - noise dbm).
2111          * SNR at or above 40 is a great signal (100%).
2112          * Below that, scale to fit SNR of 0 - 40 dB within 0 - 100% indicator.
2113          * Weakest usable signal is usually 10 - 15 dB SNR. */
2114         if (noise_dbm) {
2115                 if (rssi_dbm - noise_dbm >= 40)
2116                         return 100;
2117                 else if (rssi_dbm < noise_dbm)
2118                         return 0;
2119                 sig_qual = ((rssi_dbm - noise_dbm) * 5) / 2;
2120
2121         /* Else use just the signal level.
2122          * This formula is a least squares fit of data points collected and
2123          *   compared with a reference system that had a percentage (%) display
2124          *   for signal quality. */
2125         } else
2126                 sig_qual = (100 * (RSSI_RANGE * RSSI_RANGE) - degradation *
2127                             (15 * RSSI_RANGE + 62 * degradation)) /
2128                            (RSSI_RANGE * RSSI_RANGE);
2129
2130         if (sig_qual > 100)
2131                 sig_qual = 100;
2132         else if (sig_qual < 1)
2133                 sig_qual = 0;
2134
2135         return sig_qual;
2136 }
2137
2138 #ifdef CONFIG_IWLWIFI_DEBUG
2139 static void iwl4965_print_rx_config_cmd(struct iwl_priv *priv)
2140 {
2141         struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
2142         DECLARE_MAC_BUF(mac);
2143
2144         IWL_DEBUG_RADIO("RX CONFIG:\n");
2145         iwl_print_hex_dump(priv, IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
2146         IWL_DEBUG_RADIO("u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
2147         IWL_DEBUG_RADIO("u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
2148         IWL_DEBUG_RADIO("u32 filter_flags: 0x%08x\n",
2149                         le32_to_cpu(rxon->filter_flags));
2150         IWL_DEBUG_RADIO("u8 dev_type: 0x%x\n", rxon->dev_type);
2151         IWL_DEBUG_RADIO("u8 ofdm_basic_rates: 0x%02x\n",
2152                         rxon->ofdm_basic_rates);
2153         IWL_DEBUG_RADIO("u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
2154         IWL_DEBUG_RADIO("u8[6] node_addr: %s\n",
2155                         print_mac(mac, rxon->node_addr));
2156         IWL_DEBUG_RADIO("u8[6] bssid_addr: %s\n",
2157                         print_mac(mac, rxon->bssid_addr));
2158         IWL_DEBUG_RADIO("u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
2159 }
2160 #endif
2161
2162 static void iwl4965_enable_interrupts(struct iwl_priv *priv)
2163 {
2164         IWL_DEBUG_ISR("Enabling interrupts\n");
2165         set_bit(STATUS_INT_ENABLED, &priv->status);
2166         iwl_write32(priv, CSR_INT_MASK, CSR_INI_SET_MASK);
2167 }
2168
2169 /* call this function to flush any scheduled tasklet */
2170 static inline void iwl_synchronize_irq(struct iwl_priv *priv)
2171 {
2172         /* wait to make sure we flush pedding tasklet*/
2173         synchronize_irq(priv->pci_dev->irq);
2174         tasklet_kill(&priv->irq_tasklet);
2175 }
2176
2177 static inline void iwl4965_disable_interrupts(struct iwl_priv *priv)
2178 {
2179         clear_bit(STATUS_INT_ENABLED, &priv->status);
2180
2181         /* disable interrupts from uCode/NIC to host */
2182         iwl_write32(priv, CSR_INT_MASK, 0x00000000);
2183
2184         /* acknowledge/clear/reset any interrupts still pending
2185          * from uCode or flow handler (Rx/Tx DMA) */
2186         iwl_write32(priv, CSR_INT, 0xffffffff);
2187         iwl_write32(priv, CSR_FH_INT_STATUS, 0xffffffff);
2188         IWL_DEBUG_ISR("Disabled interrupts\n");
2189 }
2190
2191
2192 /**
2193  * iwl4965_irq_handle_error - called for HW or SW error interrupt from card
2194  */
2195 static void iwl4965_irq_handle_error(struct iwl_priv *priv)
2196 {
2197         /* Set the FW error flag -- cleared on iwl4965_down */
2198         set_bit(STATUS_FW_ERROR, &priv->status);
2199
2200         /* Cancel currently queued command. */
2201         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
2202
2203 #ifdef CONFIG_IWLWIFI_DEBUG
2204         if (priv->debug_level & IWL_DL_FW_ERRORS) {
2205                 iwl_dump_nic_error_log(priv);
2206                 iwl_dump_nic_event_log(priv);
2207                 iwl4965_print_rx_config_cmd(priv);
2208         }
2209 #endif
2210
2211         wake_up_interruptible(&priv->wait_command_queue);
2212
2213         /* Keep the restart process from trying to send host
2214          * commands by clearing the INIT status bit */
2215         clear_bit(STATUS_READY, &priv->status);
2216
2217         if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
2218                 IWL_DEBUG(IWL_DL_FW_ERRORS,
2219                           "Restarting adapter due to uCode error.\n");
2220
2221                 if (iwl_is_associated(priv)) {
2222                         memcpy(&priv->recovery_rxon, &priv->active_rxon,
2223                                sizeof(priv->recovery_rxon));
2224                         priv->error_recovering = 1;
2225                 }
2226                 if (priv->cfg->mod_params->restart_fw)
2227                         queue_work(priv->workqueue, &priv->restart);
2228         }
2229 }
2230
2231 static void iwl4965_error_recovery(struct iwl_priv *priv)
2232 {
2233         unsigned long flags;
2234
2235         memcpy(&priv->staging_rxon, &priv->recovery_rxon,
2236                sizeof(priv->staging_rxon));
2237         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2238         iwl4965_commit_rxon(priv);
2239
2240         iwl_rxon_add_station(priv, priv->bssid, 1);
2241
2242         spin_lock_irqsave(&priv->lock, flags);
2243         priv->assoc_id = le16_to_cpu(priv->staging_rxon.assoc_id);
2244         priv->error_recovering = 0;
2245         spin_unlock_irqrestore(&priv->lock, flags);
2246 }
2247
2248 static void iwl4965_irq_tasklet(struct iwl_priv *priv)
2249 {
2250         u32 inta, handled = 0;
2251         u32 inta_fh;
2252         unsigned long flags;
2253 #ifdef CONFIG_IWLWIFI_DEBUG
2254         u32 inta_mask;
2255 #endif
2256
2257         spin_lock_irqsave(&priv->lock, flags);
2258
2259         /* Ack/clear/reset pending uCode interrupts.
2260          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
2261          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
2262         inta = iwl_read32(priv, CSR_INT);
2263         iwl_write32(priv, CSR_INT, inta);
2264
2265         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
2266          * Any new interrupts that happen after this, either while we're
2267          * in this tasklet, or later, will show up in next ISR/tasklet. */
2268         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
2269         iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
2270
2271 #ifdef CONFIG_IWLWIFI_DEBUG
2272         if (priv->debug_level & IWL_DL_ISR) {
2273                 /* just for debug */
2274                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
2275                 IWL_DEBUG_ISR("inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
2276                               inta, inta_mask, inta_fh);
2277         }
2278 #endif
2279
2280         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
2281          * atomic, make sure that inta covers all the interrupts that
2282          * we've discovered, even if FH interrupt came in just after
2283          * reading CSR_INT. */
2284         if (inta_fh & CSR49_FH_INT_RX_MASK)
2285                 inta |= CSR_INT_BIT_FH_RX;
2286         if (inta_fh & CSR49_FH_INT_TX_MASK)
2287                 inta |= CSR_INT_BIT_FH_TX;
2288
2289         /* Now service all interrupt bits discovered above. */
2290         if (inta & CSR_INT_BIT_HW_ERR) {
2291                 IWL_ERROR("Microcode HW error detected.  Restarting.\n");
2292
2293                 /* Tell the device to stop sending interrupts */
2294                 iwl4965_disable_interrupts(priv);
2295
2296                 iwl4965_irq_handle_error(priv);
2297
2298                 handled |= CSR_INT_BIT_HW_ERR;
2299
2300                 spin_unlock_irqrestore(&priv->lock, flags);
2301
2302                 return;
2303         }
2304
2305 #ifdef CONFIG_IWLWIFI_DEBUG
2306         if (priv->debug_level & (IWL_DL_ISR)) {
2307                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
2308                 if (inta & CSR_INT_BIT_SCD)
2309                         IWL_DEBUG_ISR("Scheduler finished to transmit "
2310                                       "the frame/frames.\n");
2311
2312                 /* Alive notification via Rx interrupt will do the real work */
2313                 if (inta & CSR_INT_BIT_ALIVE)
2314                         IWL_DEBUG_ISR("Alive interrupt\n");
2315         }
2316 #endif
2317         /* Safely ignore these bits for debug checks below */
2318         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
2319
2320         /* HW RF KILL switch toggled */
2321         if (inta & CSR_INT_BIT_RF_KILL) {
2322                 int hw_rf_kill = 0;
2323                 if (!(iwl_read32(priv, CSR_GP_CNTRL) &
2324                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
2325                         hw_rf_kill = 1;
2326
2327                 IWL_DEBUG(IWL_DL_RF_KILL, "RF_KILL bit toggled to %s.\n",
2328                                 hw_rf_kill ? "disable radio":"enable radio");
2329
2330                 /* Queue restart only if RF_KILL switch was set to "kill"
2331                  *   when we loaded driver, and is now set to "enable".
2332                  * After we're Alive, RF_KILL gets handled by
2333                  *   iwl4965_rx_card_state_notif() */
2334                 if (!hw_rf_kill && !test_bit(STATUS_ALIVE, &priv->status)) {
2335                         clear_bit(STATUS_RF_KILL_HW, &priv->status);
2336                         queue_work(priv->workqueue, &priv->restart);
2337                 }
2338
2339                 handled |= CSR_INT_BIT_RF_KILL;
2340         }
2341
2342         /* Chip got too hot and stopped itself */
2343         if (inta & CSR_INT_BIT_CT_KILL) {
2344                 IWL_ERROR("Microcode CT kill error detected.\n");
2345                 handled |= CSR_INT_BIT_CT_KILL;
2346         }
2347
2348         /* Error detected by uCode */
2349         if (inta & CSR_INT_BIT_SW_ERR) {
2350                 IWL_ERROR("Microcode SW error detected.  Restarting 0x%X.\n",
2351                           inta);
2352                 iwl4965_irq_handle_error(priv);
2353                 handled |= CSR_INT_BIT_SW_ERR;
2354         }
2355
2356         /* uCode wakes up after power-down sleep */
2357         if (inta & CSR_INT_BIT_WAKEUP) {
2358                 IWL_DEBUG_ISR("Wakeup interrupt\n");
2359                 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
2360                 iwl_txq_update_write_ptr(priv, &priv->txq[0]);
2361                 iwl_txq_update_write_ptr(priv, &priv->txq[1]);
2362                 iwl_txq_update_write_ptr(priv, &priv->txq[2]);
2363                 iwl_txq_update_write_ptr(priv, &priv->txq[3]);
2364                 iwl_txq_update_write_ptr(priv, &priv->txq[4]);
2365                 iwl_txq_update_write_ptr(priv, &priv->txq[5]);
2366
2367                 handled |= CSR_INT_BIT_WAKEUP;
2368         }
2369
2370         /* All uCode command responses, including Tx command responses,
2371          * Rx "responses" (frame-received notification), and other
2372          * notifications from uCode come through here*/
2373         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
2374                 iwl_rx_handle(priv);
2375                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
2376         }
2377
2378         if (inta & CSR_INT_BIT_FH_TX) {
2379                 IWL_DEBUG_ISR("Tx interrupt\n");
2380                 handled |= CSR_INT_BIT_FH_TX;
2381                 /* FH finished to write, send event */
2382                 priv->ucode_write_complete = 1;
2383                 wake_up_interruptible(&priv->wait_command_queue);
2384         }
2385
2386         if (inta & ~handled)
2387                 IWL_ERROR("Unhandled INTA bits 0x%08x\n", inta & ~handled);
2388
2389         if (inta & ~CSR_INI_SET_MASK) {
2390                 IWL_WARNING("Disabled INTA bits 0x%08x were pending\n",
2391                          inta & ~CSR_INI_SET_MASK);
2392                 IWL_WARNING("   with FH_INT = 0x%08x\n", inta_fh);
2393         }
2394
2395         /* Re-enable all interrupts */
2396         /* only Re-enable if diabled by irq */
2397         if (test_bit(STATUS_INT_ENABLED, &priv->status))
2398                 iwl4965_enable_interrupts(priv);
2399
2400 #ifdef CONFIG_IWLWIFI_DEBUG
2401         if (priv->debug_level & (IWL_DL_ISR)) {
2402                 inta = iwl_read32(priv, CSR_INT);
2403                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
2404                 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
2405                 IWL_DEBUG_ISR("End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
2406                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
2407         }
2408 #endif
2409         spin_unlock_irqrestore(&priv->lock, flags);
2410 }
2411
2412 static irqreturn_t iwl4965_isr(int irq, void *data)
2413 {
2414         struct iwl_priv *priv = data;
2415         u32 inta, inta_mask;
2416         u32 inta_fh;
2417         if (!priv)
2418                 return IRQ_NONE;
2419
2420         spin_lock(&priv->lock);
2421
2422         /* Disable (but don't clear!) interrupts here to avoid
2423          *    back-to-back ISRs and sporadic interrupts from our NIC.
2424          * If we have something to service, the tasklet will re-enable ints.
2425          * If we *don't* have something, we'll re-enable before leaving here. */
2426         inta_mask = iwl_read32(priv, CSR_INT_MASK);  /* just for debug */
2427         iwl_write32(priv, CSR_INT_MASK, 0x00000000);
2428
2429         /* Discover which interrupts are active/pending */
2430         inta = iwl_read32(priv, CSR_INT);
2431         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
2432
2433         /* Ignore interrupt if there's nothing in NIC to service.
2434          * This may be due to IRQ shared with another device,
2435          * or due to sporadic interrupts thrown from our NIC. */
2436         if (!inta && !inta_fh) {
2437                 IWL_DEBUG_ISR("Ignore interrupt, inta == 0, inta_fh == 0\n");
2438                 goto none;
2439         }
2440
2441         if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
2442                 /* Hardware disappeared. It might have already raised
2443                  * an interrupt */
2444                 IWL_WARNING("HARDWARE GONE?? INTA == 0x%080x\n", inta);
2445                 goto unplugged;
2446         }
2447
2448         IWL_DEBUG_ISR("ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
2449                       inta, inta_mask, inta_fh);
2450
2451         inta &= ~CSR_INT_BIT_SCD;
2452
2453         /* iwl4965_irq_tasklet() will service interrupts and re-enable them */
2454         if (likely(inta || inta_fh))
2455                 tasklet_schedule(&priv->irq_tasklet);
2456
2457  unplugged:
2458         spin_unlock(&priv->lock);
2459         return IRQ_HANDLED;
2460
2461  none:
2462         /* re-enable interrupts here since we don't have anything to service. */
2463         /* only Re-enable if diabled by irq */
2464         if (test_bit(STATUS_INT_ENABLED, &priv->status))
2465                 iwl4965_enable_interrupts(priv);
2466         spin_unlock(&priv->lock);
2467         return IRQ_NONE;
2468 }
2469
2470 /* For active scan, listen ACTIVE_DWELL_TIME (msec) on each channel after
2471  * sending probe req.  This should be set long enough to hear probe responses
2472  * from more than one AP.  */
2473 #define IWL_ACTIVE_DWELL_TIME_24    (20)        /* all times in msec */
2474 #define IWL_ACTIVE_DWELL_TIME_52    (10)
2475
2476 /* For faster active scanning, scan will move to the next channel if fewer than
2477  * PLCP_QUIET_THRESH packets are heard on this channel within
2478  * ACTIVE_QUIET_TIME after sending probe request.  This shortens the dwell
2479  * time if it's a quiet channel (nothing responded to our probe, and there's
2480  * no other traffic).
2481  * Disable "quiet" feature by setting PLCP_QUIET_THRESH to 0. */
2482 #define IWL_PLCP_QUIET_THRESH       __constant_cpu_to_le16(1)   /* packets */
2483 #define IWL_ACTIVE_QUIET_TIME       __constant_cpu_to_le16(5)   /* msec */
2484
2485 /* For passive scan, listen PASSIVE_DWELL_TIME (msec) on each channel.
2486  * Must be set longer than active dwell time.
2487  * For the most reliable scan, set > AP beacon interval (typically 100msec). */
2488 #define IWL_PASSIVE_DWELL_TIME_24   (20)        /* all times in msec */
2489 #define IWL_PASSIVE_DWELL_TIME_52   (10)
2490 #define IWL_PASSIVE_DWELL_BASE      (100)
2491 #define IWL_CHANNEL_TUNE_TIME       5
2492
2493 static inline u16 iwl4965_get_active_dwell_time(struct iwl_priv *priv,
2494                                                 enum ieee80211_band band)
2495 {
2496         if (band == IEEE80211_BAND_5GHZ)
2497                 return IWL_ACTIVE_DWELL_TIME_52;
2498         else
2499                 return IWL_ACTIVE_DWELL_TIME_24;
2500 }
2501
2502 static u16 iwl4965_get_passive_dwell_time(struct iwl_priv *priv,
2503                                           enum ieee80211_band band)
2504 {
2505         u16 active = iwl4965_get_active_dwell_time(priv, band);
2506         u16 passive = (band != IEEE80211_BAND_5GHZ) ?
2507             IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_24 :
2508             IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_52;
2509
2510         if (iwl_is_associated(priv)) {
2511                 /* If we're associated, we clamp the maximum passive
2512                  * dwell time to be 98% of the beacon interval (minus
2513                  * 2 * channel tune time) */
2514                 passive = priv->beacon_int;
2515                 if ((passive > IWL_PASSIVE_DWELL_BASE) || !passive)
2516                         passive = IWL_PASSIVE_DWELL_BASE;
2517                 passive = (passive * 98) / 100 - IWL_CHANNEL_TUNE_TIME * 2;
2518         }
2519
2520         if (passive <= active)
2521                 passive = active + 1;
2522
2523         return passive;
2524 }
2525
2526 static int iwl4965_get_channels_for_scan(struct iwl_priv *priv,
2527                                          enum ieee80211_band band,
2528                                      u8 is_active, u8 direct_mask,
2529                                      struct iwl4965_scan_channel *scan_ch)
2530 {
2531         const struct ieee80211_channel *channels = NULL;
2532         const struct ieee80211_supported_band *sband;
2533         const struct iwl_channel_info *ch_info;
2534         u16 passive_dwell = 0;
2535         u16 active_dwell = 0;
2536         int added, i;
2537
2538         sband = iwl_get_hw_mode(priv, band);
2539         if (!sband)
2540                 return 0;
2541
2542         channels = sband->channels;
2543
2544         active_dwell = iwl4965_get_active_dwell_time(priv, band);
2545         passive_dwell = iwl4965_get_passive_dwell_time(priv, band);
2546
2547         for (i = 0, added = 0; i < sband->n_channels; i++) {
2548                 if (channels[i].flags & IEEE80211_CHAN_DISABLED)
2549                         continue;
2550
2551                 scan_ch->channel = ieee80211_frequency_to_channel(channels[i].center_freq);
2552
2553                 ch_info = iwl_get_channel_info(priv, band,
2554                                          scan_ch->channel);
2555                 if (!is_channel_valid(ch_info)) {
2556                         IWL_DEBUG_SCAN("Channel %d is INVALID for this SKU.\n",
2557                                        scan_ch->channel);
2558                         continue;
2559                 }
2560
2561                 if (!is_active || is_channel_passive(ch_info) ||
2562                     (channels[i].flags & IEEE80211_CHAN_PASSIVE_SCAN))
2563                         scan_ch->type = 0;      /* passive */
2564                 else
2565                         scan_ch->type = 1;      /* active */
2566
2567                 if (scan_ch->type & 1)
2568                         scan_ch->type |= (direct_mask << 1);
2569
2570                 scan_ch->active_dwell = cpu_to_le16(active_dwell);
2571                 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
2572
2573                 /* Set txpower levels to defaults */
2574                 scan_ch->tpc.dsp_atten = 110;
2575                 /* scan_pwr_info->tpc.dsp_atten; */
2576
2577                 /*scan_pwr_info->tpc.tx_gain; */
2578                 if (band == IEEE80211_BAND_5GHZ)
2579                         scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
2580                 else {
2581                         scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
2582                         /* NOTE: if we were doing 6Mb OFDM for scans we'd use
2583                          * power level:
2584                          * scan_ch->tpc.tx_gain = ((1 << 5) | (2 << 3)) | 3;
2585                          */
2586                 }
2587
2588                 IWL_DEBUG_SCAN("Scanning %d [%s %d]\n",
2589                                scan_ch->channel,
2590                                (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
2591                                (scan_ch->type & 1) ?
2592                                active_dwell : passive_dwell);
2593
2594                 scan_ch++;
2595                 added++;
2596         }
2597
2598         IWL_DEBUG_SCAN("total channels to scan %d \n", added);
2599         return added;
2600 }
2601
2602 /******************************************************************************
2603  *
2604  * uCode download functions
2605  *
2606  ******************************************************************************/
2607
2608 static void iwl4965_dealloc_ucode_pci(struct iwl_priv *priv)
2609 {
2610         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
2611         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
2612         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
2613         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
2614         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
2615         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
2616 }
2617
2618 static void iwl4965_nic_start(struct iwl_priv *priv)
2619 {
2620         /* Remove all resets to allow NIC to operate */
2621         iwl_write32(priv, CSR_RESET, 0);
2622 }
2623
2624
2625 /**
2626  * iwl4965_read_ucode - Read uCode images from disk file.
2627  *
2628  * Copy into buffers for card to fetch via bus-mastering
2629  */
2630 static int iwl4965_read_ucode(struct iwl_priv *priv)
2631 {
2632         struct iwl4965_ucode *ucode;
2633         int ret;
2634         const struct firmware *ucode_raw;
2635         const char *name = priv->cfg->fw_name;
2636         u8 *src;
2637         size_t len;
2638         u32 ver, inst_size, data_size, init_size, init_data_size, boot_size;
2639
2640         /* Ask kernel firmware_class module to get the boot firmware off disk.
2641          * request_firmware() is synchronous, file is in memory on return. */
2642         ret = request_firmware(&ucode_raw, name, &priv->pci_dev->dev);
2643         if (ret < 0) {
2644                 IWL_ERROR("%s firmware file req failed: Reason %d\n",
2645                                         name, ret);
2646                 goto error;
2647         }
2648
2649         IWL_DEBUG_INFO("Got firmware '%s' file (%zd bytes) from disk\n",
2650                        name, ucode_raw->size);
2651
2652         /* Make sure that we got at least our header! */
2653         if (ucode_raw->size < sizeof(*ucode)) {
2654                 IWL_ERROR("File size way too small!\n");
2655                 ret = -EINVAL;
2656                 goto err_release;
2657         }
2658
2659         /* Data from ucode file:  header followed by uCode images */
2660         ucode = (void *)ucode_raw->data;
2661
2662         ver = le32_to_cpu(ucode->ver);
2663         inst_size = le32_to_cpu(ucode->inst_size);
2664         data_size = le32_to_cpu(ucode->data_size);
2665         init_size = le32_to_cpu(ucode->init_size);
2666         init_data_size = le32_to_cpu(ucode->init_data_size);
2667         boot_size = le32_to_cpu(ucode->boot_size);
2668
2669         IWL_DEBUG_INFO("f/w package hdr ucode version = 0x%x\n", ver);
2670         IWL_DEBUG_INFO("f/w package hdr runtime inst size = %u\n",
2671                        inst_size);
2672         IWL_DEBUG_INFO("f/w package hdr runtime data size = %u\n",
2673                        data_size);
2674         IWL_DEBUG_INFO("f/w package hdr init inst size = %u\n",
2675                        init_size);
2676         IWL_DEBUG_INFO("f/w package hdr init data size = %u\n",
2677                        init_data_size);
2678         IWL_DEBUG_INFO("f/w package hdr boot inst size = %u\n",
2679                        boot_size);
2680
2681         /* Verify size of file vs. image size info in file's header */
2682         if (ucode_raw->size < sizeof(*ucode) +
2683                 inst_size + data_size + init_size +
2684                 init_data_size + boot_size) {
2685
2686                 IWL_DEBUG_INFO("uCode file size %d too small\n",
2687                                (int)ucode_raw->size);
2688                 ret = -EINVAL;
2689                 goto err_release;
2690         }
2691
2692         /* Verify that uCode images will fit in card's SRAM */
2693         if (inst_size > priv->hw_params.max_inst_size) {
2694                 IWL_DEBUG_INFO("uCode instr len %d too large to fit in\n",
2695                                inst_size);
2696                 ret = -EINVAL;
2697                 goto err_release;
2698         }
2699
2700         if (data_size > priv->hw_params.max_data_size) {
2701                 IWL_DEBUG_INFO("uCode data len %d too large to fit in\n",
2702                                 data_size);
2703                 ret = -EINVAL;
2704                 goto err_release;
2705         }
2706         if (init_size > priv->hw_params.max_inst_size) {
2707                 IWL_DEBUG_INFO
2708                     ("uCode init instr len %d too large to fit in\n",
2709                       init_size);
2710                 ret = -EINVAL;
2711                 goto err_release;
2712         }
2713         if (init_data_size > priv->hw_params.max_data_size) {
2714                 IWL_DEBUG_INFO
2715                     ("uCode init data len %d too large to fit in\n",
2716                       init_data_size);
2717                 ret = -EINVAL;
2718                 goto err_release;
2719         }
2720         if (boot_size > priv->hw_params.max_bsm_size) {
2721                 IWL_DEBUG_INFO
2722                     ("uCode boot instr len %d too large to fit in\n",
2723                       boot_size);
2724                 ret = -EINVAL;
2725                 goto err_release;
2726         }
2727
2728         /* Allocate ucode buffers for card's bus-master loading ... */
2729
2730         /* Runtime instructions and 2 copies of data:
2731          * 1) unmodified from disk
2732          * 2) backup cache for save/restore during power-downs */
2733         priv->ucode_code.len = inst_size;
2734         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
2735
2736         priv->ucode_data.len = data_size;
2737         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
2738
2739         priv->ucode_data_backup.len = data_size;
2740         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
2741
2742         /* Initialization instructions and data */
2743         if (init_size && init_data_size) {
2744                 priv->ucode_init.len = init_size;
2745                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
2746
2747                 priv->ucode_init_data.len = init_data_size;
2748                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
2749
2750                 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
2751                         goto err_pci_alloc;
2752         }
2753
2754         /* Bootstrap (instructions only, no data) */
2755         if (boot_size) {
2756                 priv->ucode_boot.len = boot_size;
2757                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
2758
2759                 if (!priv->ucode_boot.v_addr)
2760                         goto err_pci_alloc;
2761         }
2762
2763         /* Copy images into buffers for card's bus-master reads ... */
2764
2765         /* Runtime instructions (first block of data in file) */
2766         src = &ucode->data[0];
2767         len = priv->ucode_code.len;
2768         IWL_DEBUG_INFO("Copying (but not loading) uCode instr len %Zd\n", len);
2769         memcpy(priv->ucode_code.v_addr, src, len);
2770         IWL_DEBUG_INFO("uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
2771                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
2772
2773         /* Runtime data (2nd block)
2774          * NOTE:  Copy into backup buffer will be done in iwl4965_up()  */
2775         src = &ucode->data[inst_size];
2776         len = priv->ucode_data.len;
2777         IWL_DEBUG_INFO("Copying (but not loading) uCode data len %Zd\n", len);
2778         memcpy(priv->ucode_data.v_addr, src, len);
2779         memcpy(priv->ucode_data_backup.v_addr, src, len);
2780
2781         /* Initialization instructions (3rd block) */
2782         if (init_size) {
2783                 src = &ucode->data[inst_size + data_size];
2784                 len = priv->ucode_init.len;
2785                 IWL_DEBUG_INFO("Copying (but not loading) init instr len %Zd\n",
2786                                 len);
2787                 memcpy(priv->ucode_init.v_addr, src, len);
2788         }
2789
2790         /* Initialization data (4th block) */
2791         if (init_data_size) {
2792                 src = &ucode->data[inst_size + data_size + init_size];
2793                 len = priv->ucode_init_data.len;
2794                 IWL_DEBUG_INFO("Copying (but not loading) init data len %Zd\n",
2795                                len);
2796                 memcpy(priv->ucode_init_data.v_addr, src, len);
2797         }
2798
2799         /* Bootstrap instructions (5th block) */
2800         src = &ucode->data[inst_size + data_size + init_size + init_data_size];
2801         len = priv->ucode_boot.len;
2802         IWL_DEBUG_INFO("Copying (but not loading) boot instr len %Zd\n", len);
2803         memcpy(priv->ucode_boot.v_addr, src, len);
2804
2805         /* We have our copies now, allow OS release its copies */
2806         release_firmware(ucode_raw);
2807         return 0;
2808
2809  err_pci_alloc:
2810         IWL_ERROR("failed to allocate pci memory\n");
2811         ret = -ENOMEM;
2812         iwl4965_dealloc_ucode_pci(priv);
2813
2814  err_release:
2815         release_firmware(ucode_raw);
2816
2817  error:
2818         return ret;
2819 }
2820
2821 /**
2822  * iwl_alive_start - called after REPLY_ALIVE notification received
2823  *                   from protocol/runtime uCode (initialization uCode's
2824  *                   Alive gets handled by iwl_init_alive_start()).
2825  */
2826 static void iwl_alive_start(struct iwl_priv *priv)
2827 {
2828         int ret = 0;
2829
2830         IWL_DEBUG_INFO("Runtime Alive received.\n");
2831
2832         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
2833                 /* We had an error bringing up the hardware, so take it
2834                  * all the way back down so we can try again */
2835                 IWL_DEBUG_INFO("Alive failed.\n");
2836                 goto restart;
2837         }
2838
2839         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
2840          * This is a paranoid check, because we would not have gotten the
2841          * "runtime" alive if code weren't properly loaded.  */
2842         if (iwl_verify_ucode(priv)) {
2843                 /* Runtime instruction load was bad;
2844                  * take it all the way back down so we can try again */
2845                 IWL_DEBUG_INFO("Bad runtime uCode load.\n");
2846                 goto restart;
2847         }
2848
2849         iwlcore_clear_stations_table(priv);
2850         ret = priv->cfg->ops->lib->alive_notify(priv);
2851         if (ret) {
2852                 IWL_WARNING("Could not complete ALIVE transition [ntf]: %d\n",
2853                             ret);
2854                 goto restart;
2855         }
2856
2857         /* After the ALIVE response, we can send host commands to 4965 uCode */
2858         set_bit(STATUS_ALIVE, &priv->status);
2859
2860         if (iwl_is_rfkill(priv))
2861                 return;
2862
2863         ieee80211_wake_queues(priv->hw);
2864
2865         priv->active_rate = priv->rates_mask;
2866         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
2867
2868         if (iwl_is_associated(priv)) {
2869                 struct iwl_rxon_cmd *active_rxon =
2870                                 (struct iwl_rxon_cmd *)&priv->active_rxon;
2871
2872                 memcpy(&priv->staging_rxon, &priv->active_rxon,
2873                        sizeof(priv->staging_rxon));
2874                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2875         } else {
2876                 /* Initialize our rx_config data */
2877                 iwl4965_connection_init_rx_config(priv);
2878                 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
2879         }
2880
2881         /* Configure Bluetooth device coexistence support */
2882         iwl4965_send_bt_config(priv);
2883
2884         iwl_reset_run_time_calib(priv);
2885
2886         /* Configure the adapter for unassociated operation */
2887         iwl4965_commit_rxon(priv);
2888
2889         /* At this point, the NIC is initialized and operational */
2890         iwl4965_rf_kill_ct_config(priv);
2891
2892         iwl_leds_register(priv);
2893
2894         IWL_DEBUG_INFO("ALIVE processing complete.\n");
2895         set_bit(STATUS_READY, &priv->status);
2896         wake_up_interruptible(&priv->wait_command_queue);
2897
2898         if (priv->error_recovering)
2899                 iwl4965_error_recovery(priv);
2900
2901         iwlcore_low_level_notify(priv, IWLCORE_START_EVT);
2902         ieee80211_notify_mac(priv->hw, IEEE80211_NOTIFY_RE_ASSOC);
2903
2904         if (test_and_clear_bit(STATUS_MODE_PENDING, &priv->status))
2905                 iwl4965_set_mode(priv, priv->iw_mode);
2906
2907         return;
2908
2909  restart:
2910         queue_work(priv->workqueue, &priv->restart);
2911 }
2912
2913 static void iwl_cancel_deferred_work(struct iwl_priv *priv);
2914
2915 static void __iwl4965_down(struct iwl_priv *priv)
2916 {
2917         unsigned long flags;
2918         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
2919
2920         IWL_DEBUG_INFO(DRV_NAME " is going down\n");
2921
2922         if (!exit_pending)
2923                 set_bit(STATUS_EXIT_PENDING, &priv->status);
2924
2925         iwl_leds_unregister(priv);
2926
2927         iwlcore_low_level_notify(priv, IWLCORE_STOP_EVT);
2928
2929         iwlcore_clear_stations_table(priv);
2930
2931         /* Unblock any waiting calls */
2932         wake_up_interruptible_all(&priv->wait_command_queue);
2933
2934         /* Wipe out the EXIT_PENDING status bit if we are not actually
2935          * exiting the module */
2936         if (!exit_pending)
2937                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
2938
2939         /* stop and reset the on-board processor */
2940         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
2941
2942         /* tell the device to stop sending interrupts */
2943         spin_lock_irqsave(&priv->lock, flags);
2944         iwl4965_disable_interrupts(priv);
2945         spin_unlock_irqrestore(&priv->lock, flags);
2946         iwl_synchronize_irq(priv);
2947
2948         if (priv->mac80211_registered)
2949                 ieee80211_stop_queues(priv->hw);
2950
2951         /* If we have not previously called iwl4965_init() then
2952          * clear all bits but the RF Kill and SUSPEND bits and return */
2953         if (!iwl_is_init(priv)) {
2954                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2955                                         STATUS_RF_KILL_HW |
2956                                test_bit(STATUS_RF_KILL_SW, &priv->status) <<
2957                                         STATUS_RF_KILL_SW |
2958                                test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2959                                         STATUS_GEO_CONFIGURED |
2960                                test_bit(STATUS_IN_SUSPEND, &priv->status) <<
2961                                         STATUS_IN_SUSPEND;
2962                 goto exit;
2963         }
2964
2965         /* ...otherwise clear out all the status bits but the RF Kill and
2966          * SUSPEND bits and continue taking the NIC down. */
2967         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2968                                 STATUS_RF_KILL_HW |
2969                         test_bit(STATUS_RF_KILL_SW, &priv->status) <<
2970                                 STATUS_RF_KILL_SW |
2971                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2972                                 STATUS_GEO_CONFIGURED |
2973                         test_bit(STATUS_IN_SUSPEND, &priv->status) <<
2974                                 STATUS_IN_SUSPEND |
2975                         test_bit(STATUS_FW_ERROR, &priv->status) <<
2976                                 STATUS_FW_ERROR;
2977
2978         spin_lock_irqsave(&priv->lock, flags);
2979         iwl_clear_bit(priv, CSR_GP_CNTRL,
2980                          CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
2981         spin_unlock_irqrestore(&priv->lock, flags);
2982
2983         iwl_txq_ctx_stop(priv);
2984         iwl_rxq_stop(priv);
2985
2986         spin_lock_irqsave(&priv->lock, flags);
2987         if (!iwl_grab_nic_access(priv)) {
2988                 iwl_write_prph(priv, APMG_CLK_DIS_REG,
2989                                          APMG_CLK_VAL_DMA_CLK_RQT);
2990                 iwl_release_nic_access(priv);
2991         }
2992         spin_unlock_irqrestore(&priv->lock, flags);
2993
2994         udelay(5);
2995
2996         /* FIXME: apm_ops.suspend(priv) */
2997         priv->cfg->ops->lib->apm_ops.reset(priv);
2998         priv->cfg->ops->lib->free_shared_mem(priv);
2999
3000  exit:
3001         memset(&priv->card_alive, 0, sizeof(struct iwl_alive_resp));
3002
3003         if (priv->ibss_beacon)
3004                 dev_kfree_skb(priv->ibss_beacon);
3005         priv->ibss_beacon = NULL;
3006
3007         /* clear out any free frames */
3008         iwl_clear_free_frames(priv);
3009 }
3010
3011 static void iwl4965_down(struct iwl_priv *priv)
3012 {
3013         mutex_lock(&priv->mutex);
3014         __iwl4965_down(priv);
3015         mutex_unlock(&priv->mutex);
3016
3017         iwl_cancel_deferred_work(priv);
3018 }
3019
3020 #define MAX_HW_RESTARTS 5
3021
3022 static int __iwl4965_up(struct iwl_priv *priv)
3023 {
3024         int i;
3025         int ret;
3026
3027         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
3028                 IWL_WARNING("Exit pending; will not bring the NIC up\n");
3029                 return -EIO;
3030         }
3031
3032         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
3033                 IWL_ERROR("ucode not available for device bringup\n");
3034                 return -EIO;
3035         }
3036
3037         /* If platform's RF_KILL switch is NOT set to KILL */
3038         if (iwl_read32(priv, CSR_GP_CNTRL) &
3039                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
3040                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
3041         else {
3042                 set_bit(STATUS_RF_KILL_HW, &priv->status);
3043                 if (!test_bit(STATUS_IN_SUSPEND, &priv->status)) {
3044                         iwl_rfkill_set_hw_state(priv);
3045                         IWL_WARNING("Radio disabled by HW RF Kill switch\n");
3046                         return -ENODEV;
3047                 }
3048         }
3049
3050         iwl_rfkill_set_hw_state(priv);
3051         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
3052
3053         ret = priv->cfg->ops->lib->alloc_shared_mem(priv);
3054         if (ret) {
3055                 IWL_ERROR("Unable to allocate shared memory\n");
3056                 return ret;
3057         }
3058
3059         ret = iwl_hw_nic_init(priv);
3060         if (ret) {
3061                 IWL_ERROR("Unable to init nic\n");
3062                 return ret;
3063         }
3064
3065         /* make sure rfkill handshake bits are cleared */
3066         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
3067         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
3068                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
3069
3070         /* clear (again), then enable host interrupts */
3071         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
3072         iwl4965_enable_interrupts(priv);
3073
3074         /* really make sure rfkill handshake bits are cleared */
3075         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
3076         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
3077
3078         /* Copy original ucode data image from disk into backup cache.
3079          * This will be used to initialize the on-board processor's
3080          * data SRAM for a clean start when the runtime program first loads. */
3081         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
3082                priv->ucode_data.len);
3083
3084         /* We return success when we resume from suspend and rf_kill is on. */
3085         if (test_bit(STATUS_RF_KILL_HW, &priv->status) ||
3086             test_bit(STATUS_RF_KILL_SW, &priv->status))
3087                 return 0;
3088
3089         for (i = 0; i < MAX_HW_RESTARTS; i++) {
3090
3091                 iwlcore_clear_stations_table(priv);
3092
3093                 /* load bootstrap state machine,
3094                  * load bootstrap program into processor's memory,
3095                  * prepare to load the "initialize" uCode */
3096                 ret = priv->cfg->ops->lib->load_ucode(priv);
3097
3098                 if (ret) {
3099                         IWL_ERROR("Unable to set up bootstrap uCode: %d\n", ret);
3100                         continue;
3101                 }
3102
3103                 /* Clear out the uCode error bit if it is set */
3104                 clear_bit(STATUS_FW_ERROR, &priv->status);
3105
3106                 /* start card; "initialize" will load runtime ucode */
3107                 iwl4965_nic_start(priv);
3108
3109                 IWL_DEBUG_INFO(DRV_NAME " is coming up\n");
3110
3111                 return 0;
3112         }
3113
3114         set_bit(STATUS_EXIT_PENDING, &priv->status);
3115         __iwl4965_down(priv);
3116         clear_bit(STATUS_EXIT_PENDING, &priv->status);
3117
3118         /* tried to restart and config the device for as long as our
3119          * patience could withstand */
3120         IWL_ERROR("Unable to initialize device after %d attempts.\n", i);
3121         return -EIO;
3122 }
3123
3124
3125 /*****************************************************************************
3126  *
3127  * Workqueue callbacks
3128  *
3129  *****************************************************************************/
3130
3131 static void iwl_bg_init_alive_start(struct work_struct *data)
3132 {
3133         struct iwl_priv *priv =
3134             container_of(data, struct iwl_priv, init_alive_start.work);
3135
3136         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3137                 return;
3138
3139         mutex_lock(&priv->mutex);
3140         priv->cfg->ops->lib->init_alive_start(priv);
3141         mutex_unlock(&priv->mutex);
3142 }
3143
3144 static void iwl_bg_alive_start(struct work_struct *data)
3145 {
3146         struct iwl_priv *priv =
3147             container_of(data, struct iwl_priv, alive_start.work);
3148
3149         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3150                 return;
3151
3152         mutex_lock(&priv->mutex);
3153         iwl_alive_start(priv);
3154         mutex_unlock(&priv->mutex);
3155 }
3156
3157 static void iwl4965_bg_rf_kill(struct work_struct *work)
3158 {
3159         struct iwl_priv *priv = container_of(work, struct iwl_priv, rf_kill);
3160
3161         wake_up_interruptible(&priv->wait_command_queue);
3162
3163         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3164                 return;
3165
3166         mutex_lock(&priv->mutex);
3167
3168         if (!iwl_is_rfkill(priv)) {
3169                 IWL_DEBUG(IWL_DL_RF_KILL,
3170                           "HW and/or SW RF Kill no longer active, restarting "
3171                           "device\n");
3172                 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
3173                         queue_work(priv->workqueue, &priv->restart);
3174         } else {
3175                 /* make sure mac80211 stop sending Tx frame */
3176                 if (priv->mac80211_registered)
3177                         ieee80211_stop_queues(priv->hw);
3178
3179                 if (!test_bit(STATUS_RF_KILL_HW, &priv->status))
3180                         IWL_DEBUG_RF_KILL("Can not turn radio back on - "
3181                                           "disabled by SW switch\n");
3182                 else
3183                         IWL_WARNING("Radio Frequency Kill Switch is On:\n"
3184                                     "Kill switch must be turned off for "
3185                                     "wireless networking to work.\n");
3186         }
3187         iwl_rfkill_set_hw_state(priv);
3188
3189         mutex_unlock(&priv->mutex);
3190 }
3191
3192 static void iwl4965_bg_set_monitor(struct work_struct *work)
3193 {
3194         struct iwl_priv *priv = container_of(work,
3195                                 struct iwl_priv, set_monitor);
3196         int ret;
3197
3198         IWL_DEBUG(IWL_DL_STATE, "setting monitor mode\n");
3199
3200         mutex_lock(&priv->mutex);
3201
3202         ret = iwl4965_set_mode(priv, IEEE80211_IF_TYPE_MNTR);
3203
3204         if (ret) {
3205                 if (ret == -EAGAIN)
3206                         IWL_DEBUG(IWL_DL_STATE, "leave - not ready\n");
3207                 else
3208                         IWL_ERROR("iwl4965_set_mode() failed ret = %d\n", ret);
3209         }
3210
3211         mutex_unlock(&priv->mutex);
3212 }
3213
3214 #define IWL_SCAN_CHECK_WATCHDOG (7 * HZ)
3215
3216 static void iwl4965_bg_scan_check(struct work_struct *data)
3217 {
3218         struct iwl_priv *priv =
3219             container_of(data, struct iwl_priv, scan_check.work);
3220
3221         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3222                 return;
3223
3224         mutex_lock(&priv->mutex);
3225         if (test_bit(STATUS_SCANNING, &priv->status) ||
3226             test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
3227                 IWL_DEBUG(IWL_DL_SCAN, "Scan completion watchdog resetting "
3228                         "adapter (%dms)\n",
3229                         jiffies_to_msecs(IWL_SCAN_CHECK_WATCHDOG));
3230
3231                 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
3232                         iwl4965_send_scan_abort(priv);
3233         }
3234         mutex_unlock(&priv->mutex);
3235 }
3236
3237 static void iwl4965_bg_request_scan(struct work_struct *data)
3238 {
3239         struct iwl_priv *priv =
3240             container_of(data, struct iwl_priv, request_scan);
3241         struct iwl_host_cmd cmd = {
3242                 .id = REPLY_SCAN_CMD,
3243                 .len = sizeof(struct iwl4965_scan_cmd),
3244                 .meta.flags = CMD_SIZE_HUGE,
3245         };
3246         struct iwl4965_scan_cmd *scan;
3247         struct ieee80211_conf *conf = NULL;
3248         u16 cmd_len;
3249         enum ieee80211_band band;
3250         u8 direct_mask;
3251         int ret = 0;
3252
3253         conf = ieee80211_get_hw_conf(priv->hw);
3254
3255         mutex_lock(&priv->mutex);
3256
3257         if (!iwl_is_ready(priv)) {
3258                 IWL_WARNING("request scan called when driver not ready.\n");
3259                 goto done;
3260         }
3261
3262         /* Make sure the scan wasn't cancelled before this queued work
3263          * was given the chance to run... */
3264         if (!test_bit(STATUS_SCANNING, &priv->status))
3265                 goto done;
3266
3267         /* This should never be called or scheduled if there is currently
3268          * a scan active in the hardware. */
3269         if (test_bit(STATUS_SCAN_HW, &priv->status)) {
3270                 IWL_DEBUG_INFO("Multiple concurrent scan requests in parallel. "
3271                                "Ignoring second request.\n");
3272                 ret = -EIO;
3273                 goto done;
3274         }
3275
3276         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
3277                 IWL_DEBUG_SCAN("Aborting scan due to device shutdown\n");
3278                 goto done;
3279         }
3280
3281         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
3282                 IWL_DEBUG_HC("Scan request while abort pending.  Queuing.\n");
3283                 goto done;
3284         }
3285
3286         if (iwl_is_rfkill(priv)) {
3287                 IWL_DEBUG_HC("Aborting scan due to RF Kill activation\n");
3288                 goto done;
3289         }
3290
3291         if (!test_bit(STATUS_READY, &priv->status)) {
3292                 IWL_DEBUG_HC("Scan request while uninitialized.  Queuing.\n");
3293                 goto done;
3294         }
3295
3296         if (!priv->scan_bands) {
3297                 IWL_DEBUG_HC("Aborting scan due to no requested bands\n");
3298                 goto done;
3299         }
3300
3301         if (!priv->scan) {
3302                 priv->scan = kmalloc(sizeof(struct iwl4965_scan_cmd) +
3303                                      IWL_MAX_SCAN_SIZE, GFP_KERNEL);
3304                 if (!priv->scan) {
3305                         ret = -ENOMEM;
3306                         goto done;
3307                 }
3308         }
3309         scan = priv->scan;
3310         memset(scan, 0, sizeof(struct iwl4965_scan_cmd) + IWL_MAX_SCAN_SIZE);
3311
3312         scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
3313         scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
3314
3315         if (iwl_is_associated(priv)) {
3316                 u16 interval = 0;
3317                 u32 extra;
3318                 u32 suspend_time = 100;
3319                 u32 scan_suspend_time = 100;
3320                 unsigned long flags;
3321
3322                 IWL_DEBUG_INFO("Scanning while associated...\n");
3323
3324                 spin_lock_irqsave(&priv->lock, flags);
3325                 interval = priv->beacon_int;
3326                 spin_unlock_irqrestore(&priv->lock, flags);
3327
3328                 scan->suspend_time = 0;
3329                 scan->max_out_time = cpu_to_le32(200 * 1024);
3330                 if (!interval)
3331                         interval = suspend_time;
3332
3333                 extra = (suspend_time / interval) << 22;
3334                 scan_suspend_time = (extra |
3335                     ((suspend_time % interval) * 1024));
3336                 scan->suspend_time = cpu_to_le32(scan_suspend_time);
3337                 IWL_DEBUG_SCAN("suspend_time 0x%X beacon interval %d\n",
3338                                scan_suspend_time, interval);
3339         }
3340
3341         /* We should add the ability for user to lock to PASSIVE ONLY */
3342         if (priv->one_direct_scan) {
3343                 IWL_DEBUG_SCAN
3344                     ("Kicking off one direct scan for '%s'\n",
3345                      iwl4965_escape_essid(priv->direct_ssid,
3346                                       priv->direct_ssid_len));
3347                 scan->direct_scan[0].id = WLAN_EID_SSID;
3348                 scan->direct_scan[0].len = priv->direct_ssid_len;
3349                 memcpy(scan->direct_scan[0].ssid,
3350                        priv->direct_ssid, priv->direct_ssid_len);
3351                 direct_mask = 1;
3352         } else if (!iwl_is_associated(priv) && priv->essid_len) {
3353                 IWL_DEBUG_SCAN
3354                   ("Kicking off one direct scan for '%s' when not associated\n",
3355                    iwl4965_escape_essid(priv->essid, priv->essid_len));
3356                 scan->direct_scan[0].id = WLAN_EID_SSID;
3357                 scan->direct_scan[0].len = priv->essid_len;
3358                 memcpy(scan->direct_scan[0].ssid, priv->essid, priv->essid_len);
3359                 direct_mask = 1;
3360         } else {
3361                 IWL_DEBUG_SCAN("Kicking off one indirect scan.\n");
3362                 direct_mask = 0;
3363         }
3364
3365         scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
3366         scan->tx_cmd.sta_id = priv->hw_params.bcast_sta_id;
3367         scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
3368
3369
3370         switch (priv->scan_bands) {
3371         case 2:
3372                 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
3373                 scan->tx_cmd.rate_n_flags =
3374                                 iwl4965_hw_set_rate_n_flags(IWL_RATE_1M_PLCP,
3375                                 RATE_MCS_ANT_B_MSK|RATE_MCS_CCK_MSK);
3376
3377                 scan->good_CRC_th = 0;
3378                 band = IEEE80211_BAND_2GHZ;
3379                 break;
3380
3381         case 1:
3382                 scan->tx_cmd.rate_n_flags =
3383                                 iwl4965_hw_set_rate_n_flags(IWL_RATE_6M_PLCP,
3384                                 RATE_MCS_ANT_B_MSK);
3385                 scan->good_CRC_th = IWL_GOOD_CRC_TH;
3386                 band = IEEE80211_BAND_5GHZ;
3387                 break;
3388
3389         default:
3390                 IWL_WARNING("Invalid scan band count\n");
3391                 goto done;
3392         }
3393
3394         /* We don't build a direct scan probe request; the uCode will do
3395          * that based on the direct_mask added to each channel entry */
3396         cmd_len = iwl4965_fill_probe_req(priv, band,
3397                                         (struct ieee80211_mgmt *)scan->data,
3398                                         IWL_MAX_SCAN_SIZE - sizeof(*scan), 0);
3399
3400         scan->tx_cmd.len = cpu_to_le16(cmd_len);
3401         /* select Rx chains */
3402
3403         /* Force use of chains B and C (0x6) for scan Rx.
3404          * Avoid A (0x1) because of its off-channel reception on A-band.
3405          * MIMO is not used here, but value is required to make uCode happy. */
3406         scan->rx_chain = RXON_RX_CHAIN_DRIVER_FORCE_MSK |
3407                         cpu_to_le16((0x7 << RXON_RX_CHAIN_VALID_POS) |
3408                         (0x6 << RXON_RX_CHAIN_FORCE_SEL_POS) |
3409                         (0x7 << RXON_RX_CHAIN_FORCE_MIMO_SEL_POS));
3410
3411         if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR)
3412                 scan->filter_flags = RXON_FILTER_PROMISC_MSK;
3413
3414         if (direct_mask)
3415                 scan->channel_count =
3416                         iwl4965_get_channels_for_scan(
3417                                 priv, band, 1, /* active */
3418                                 direct_mask,
3419                                 (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
3420         else
3421                 scan->channel_count =
3422                         iwl4965_get_channels_for_scan(
3423                                 priv, band, 0, /* passive */
3424                                 direct_mask,
3425                                 (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
3426
3427         scan->filter_flags |= (RXON_FILTER_ACCEPT_GRP_MSK |
3428                                RXON_FILTER_BCON_AWARE_MSK);
3429         cmd.len += le16_to_cpu(scan->tx_cmd.len) +
3430             scan->channel_count * sizeof(struct iwl4965_scan_channel);
3431         cmd.data = scan;
3432         scan->len = cpu_to_le16(cmd.len);
3433
3434         set_bit(STATUS_SCAN_HW, &priv->status);
3435         ret = iwl_send_cmd_sync(priv, &cmd);
3436         if (ret)
3437                 goto done;
3438
3439         queue_delayed_work(priv->workqueue, &priv->scan_check,
3440                            IWL_SCAN_CHECK_WATCHDOG);
3441
3442         mutex_unlock(&priv->mutex);
3443         return;
3444
3445  done:
3446         /* inform mac80211 scan aborted */
3447         queue_work(priv->workqueue, &priv->scan_completed);
3448         mutex_unlock(&priv->mutex);
3449 }
3450
3451 static void iwl_bg_run_time_calib_work(struct work_struct *work)
3452 {
3453         struct iwl_priv *priv = container_of(work, struct iwl_priv,
3454                         run_time_calib_work);
3455
3456         mutex_lock(&priv->mutex);
3457
3458         if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
3459             test_bit(STATUS_SCANNING, &priv->status)) {
3460                 mutex_unlock(&priv->mutex);
3461                 return;
3462         }
3463
3464         if (priv->start_calib) {
3465                 iwl_chain_noise_calibration(priv, &priv->statistics);
3466
3467                 iwl_sensitivity_calibration(priv, &priv->statistics);
3468         }
3469
3470         mutex_unlock(&priv->mutex);
3471         return;
3472 }
3473
3474 static void iwl4965_bg_up(struct work_struct *data)
3475 {
3476         struct iwl_priv *priv = container_of(data, struct iwl_priv, up);
3477
3478         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3479                 return;
3480
3481         mutex_lock(&priv->mutex);
3482         __iwl4965_up(priv);
3483         mutex_unlock(&priv->mutex);
3484 }
3485
3486 static void iwl4965_bg_restart(struct work_struct *data)
3487 {
3488         struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
3489
3490         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3491                 return;
3492
3493         iwl4965_down(priv);
3494         queue_work(priv->workqueue, &priv->up);
3495 }
3496
3497 static void iwl4965_bg_rx_replenish(struct work_struct *data)
3498 {
3499         struct iwl_priv *priv =
3500             container_of(data, struct iwl_priv, rx_replenish);
3501
3502         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3503                 return;
3504
3505         mutex_lock(&priv->mutex);
3506         iwl_rx_replenish(priv);
3507         mutex_unlock(&priv->mutex);
3508 }
3509
3510 #define IWL_DELAY_NEXT_SCAN (HZ*2)
3511
3512 static void iwl4965_post_associate(struct iwl_priv *priv)
3513 {
3514         struct ieee80211_conf *conf = NULL;
3515         int ret = 0;
3516         DECLARE_MAC_BUF(mac);
3517
3518         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
3519                 IWL_ERROR("%s Should not be called in AP mode\n", __FUNCTION__);
3520                 return;
3521         }
3522
3523         IWL_DEBUG_ASSOC("Associated as %d to: %s\n",
3524                         priv->assoc_id,
3525                         print_mac(mac, priv->active_rxon.bssid_addr));
3526
3527
3528         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3529                 return;
3530
3531
3532         if (!priv->vif || !priv->is_open)
3533                 return;
3534
3535         iwl4965_scan_cancel_timeout(priv, 200);
3536
3537         conf = ieee80211_get_hw_conf(priv->hw);
3538
3539         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3540         iwl4965_commit_rxon(priv);
3541
3542         memset(&priv->rxon_timing, 0, sizeof(struct iwl4965_rxon_time_cmd));
3543         iwl4965_setup_rxon_timing(priv);
3544         ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
3545                               sizeof(priv->rxon_timing), &priv->rxon_timing);
3546         if (ret)
3547                 IWL_WARNING("REPLY_RXON_TIMING failed - "
3548                             "Attempting to continue.\n");
3549
3550         priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
3551
3552         if (priv->current_ht_config.is_ht)
3553                 iwl_set_rxon_ht(priv, &priv->current_ht_config);
3554
3555         iwl_set_rxon_chain(priv);
3556         priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
3557
3558         IWL_DEBUG_ASSOC("assoc id %d beacon interval %d\n",
3559                         priv->assoc_id, priv->beacon_int);
3560
3561         if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
3562                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
3563         else
3564                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
3565
3566         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
3567                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
3568                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
3569                 else
3570                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
3571
3572                 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
3573                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
3574
3575         }
3576
3577         iwl4965_commit_rxon(priv);
3578
3579         switch (priv->iw_mode) {
3580         case IEEE80211_IF_TYPE_STA:
3581                 iwl4965_rate_scale_init(priv->hw, IWL_AP_ID);
3582                 break;
3583
3584         case IEEE80211_IF_TYPE_IBSS:
3585
3586                 /* assume default assoc id */
3587                 priv->assoc_id = 1;
3588
3589                 iwl_rxon_add_station(priv, priv->bssid, 0);
3590                 iwl4965_rate_scale_init(priv->hw, IWL_STA_ID);
3591                 iwl4965_send_beacon_cmd(priv);
3592
3593                 break;
3594
3595         default:
3596                 IWL_ERROR("%s Should not be called in %d mode\n",
3597                                 __FUNCTION__, priv->iw_mode);
3598                 break;
3599         }
3600
3601         iwl4965_sequence_reset(priv);
3602
3603         /* Enable Rx differential gain and sensitivity calibrations */
3604         iwl_chain_noise_reset(priv);
3605         priv->start_calib = 1;
3606
3607         if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
3608                 priv->assoc_station_added = 1;
3609
3610         iwl4965_activate_qos(priv, 0);
3611
3612         iwl_power_update_mode(priv, 0);
3613         /* we have just associated, don't start scan too early */
3614         priv->next_scan_jiffies = jiffies + IWL_DELAY_NEXT_SCAN;
3615 }
3616
3617
3618 static void iwl4965_bg_post_associate(struct work_struct *data)
3619 {
3620         struct iwl_priv *priv = container_of(data, struct iwl_priv,
3621                                              post_associate.work);
3622
3623         mutex_lock(&priv->mutex);
3624         iwl4965_post_associate(priv);
3625         mutex_unlock(&priv->mutex);
3626
3627 }
3628
3629 static void iwl4965_bg_abort_scan(struct work_struct *work)
3630 {
3631         struct iwl_priv *priv = container_of(work, struct iwl_priv, abort_scan);
3632
3633         if (!iwl_is_ready(priv))
3634                 return;
3635
3636         mutex_lock(&priv->mutex);
3637
3638         set_bit(STATUS_SCAN_ABORTING, &priv->status);
3639         iwl4965_send_scan_abort(priv);
3640
3641         mutex_unlock(&priv->mutex);
3642 }
3643
3644 static int iwl4965_mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf);
3645
3646 static void iwl4965_bg_scan_completed(struct work_struct *work)
3647 {
3648         struct iwl_priv *priv =
3649             container_of(work, struct iwl_priv, scan_completed);
3650
3651         IWL_DEBUG(IWL_DL_SCAN, "SCAN complete scan\n");
3652
3653         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3654                 return;
3655
3656         if (test_bit(STATUS_CONF_PENDING, &priv->status))
3657                 iwl4965_mac_config(priv->hw, ieee80211_get_hw_conf(priv->hw));
3658
3659         ieee80211_scan_completed(priv->hw);
3660
3661         /* Since setting the TXPOWER may have been deferred while
3662          * performing the scan, fire one off */
3663         mutex_lock(&priv->mutex);
3664         iwl4965_hw_reg_send_txpower(priv);
3665         mutex_unlock(&priv->mutex);
3666 }
3667
3668 /*****************************************************************************
3669  *
3670  * mac80211 entry point functions
3671  *
3672  *****************************************************************************/
3673
3674 #define UCODE_READY_TIMEOUT     (2 * HZ)
3675
3676 static int iwl4965_mac_start(struct ieee80211_hw *hw)
3677 {
3678         struct iwl_priv *priv = hw->priv;
3679         int ret;
3680
3681         IWL_DEBUG_MAC80211("enter\n");
3682
3683         if (pci_enable_device(priv->pci_dev)) {
3684                 IWL_ERROR("Fail to pci_enable_device\n");
3685                 return -ENODEV;
3686         }
3687         pci_restore_state(priv->pci_dev);
3688         pci_enable_msi(priv->pci_dev);
3689
3690         ret = request_irq(priv->pci_dev->irq, iwl4965_isr, IRQF_SHARED,
3691                           DRV_NAME, priv);
3692         if (ret) {
3693                 IWL_ERROR("Error allocating IRQ %d\n", priv->pci_dev->irq);
3694                 goto out_disable_msi;
3695         }
3696
3697         /* we should be verifying the device is ready to be opened */
3698         mutex_lock(&priv->mutex);
3699
3700         memset(&priv->staging_rxon, 0, sizeof(struct iwl_rxon_cmd));
3701         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
3702          * ucode filename and max sizes are card-specific. */
3703
3704         if (!priv->ucode_code.len) {
3705                 ret = iwl4965_read_ucode(priv);
3706                 if (ret) {
3707                         IWL_ERROR("Could not read microcode: %d\n", ret);
3708                         mutex_unlock(&priv->mutex);
3709                         goto out_release_irq;
3710                 }
3711         }
3712
3713         ret = __iwl4965_up(priv);
3714
3715         mutex_unlock(&priv->mutex);
3716
3717         if (ret)
3718                 goto out_release_irq;
3719
3720         IWL_DEBUG_INFO("Start UP work done.\n");
3721
3722         if (test_bit(STATUS_IN_SUSPEND, &priv->status))
3723                 return 0;
3724
3725         /* Wait for START_ALIVE from Run Time ucode. Otherwise callbacks from
3726          * mac80211 will not be run successfully. */
3727         if (priv->ucode_type == UCODE_RT) {
3728                 ret = wait_event_interruptible_timeout(priv->wait_command_queue,
3729                                 test_bit(STATUS_READY, &priv->status),
3730                                 UCODE_READY_TIMEOUT);
3731                 if (!ret) {
3732                         if (!test_bit(STATUS_READY, &priv->status)) {
3733                                 IWL_ERROR("START_ALIVE timeout after %dms.\n",
3734                                         jiffies_to_msecs(UCODE_READY_TIMEOUT));
3735                                 ret = -ETIMEDOUT;
3736                                 goto out_release_irq;
3737                         }
3738                 }
3739
3740                 priv->is_open = 1;
3741         }
3742         IWL_DEBUG_MAC80211("leave\n");
3743         return 0;
3744
3745 out_release_irq:
3746         free_irq(priv->pci_dev->irq, priv);
3747 out_disable_msi:
3748         pci_disable_msi(priv->pci_dev);
3749         pci_disable_device(priv->pci_dev);
3750         priv->is_open = 0;
3751         IWL_DEBUG_MAC80211("leave - failed\n");
3752         return ret;
3753 }
3754
3755 static void iwl4965_mac_stop(struct ieee80211_hw *hw)
3756 {
3757         struct iwl_priv *priv = hw->priv;
3758
3759         IWL_DEBUG_MAC80211("enter\n");
3760
3761         if (!priv->is_open) {
3762                 IWL_DEBUG_MAC80211("leave - skip\n");
3763                 return;
3764         }
3765
3766         priv->is_open = 0;
3767
3768         if (iwl_is_ready_rf(priv)) {
3769                 /* stop mac, cancel any scan request and clear
3770                  * RXON_FILTER_ASSOC_MSK BIT
3771                  */
3772                 mutex_lock(&priv->mutex);
3773                 iwl4965_scan_cancel_timeout(priv, 100);
3774                 cancel_delayed_work(&priv->post_associate);
3775                 mutex_unlock(&priv->mutex);
3776         }
3777
3778         iwl4965_down(priv);
3779
3780         flush_workqueue(priv->workqueue);
3781         free_irq(priv->pci_dev->irq, priv);
3782         pci_disable_msi(priv->pci_dev);
3783         pci_save_state(priv->pci_dev);
3784         pci_disable_device(priv->pci_dev);
3785
3786         IWL_DEBUG_MAC80211("leave\n");
3787 }
3788
3789 static int iwl4965_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
3790 {
3791         struct iwl_priv *priv = hw->priv;
3792
3793         IWL_DEBUG_MAC80211("enter\n");
3794
3795         if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR) {
3796                 IWL_DEBUG_MAC80211("leave - monitor\n");
3797                 return -1;
3798         }
3799
3800         IWL_DEBUG_TX("dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
3801                      ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
3802
3803         if (iwl_tx_skb(priv, skb))
3804                 dev_kfree_skb_any(skb);
3805
3806         IWL_DEBUG_MAC80211("leave\n");
3807         return 0;
3808 }
3809
3810 static int iwl4965_mac_add_interface(struct ieee80211_hw *hw,
3811                                  struct ieee80211_if_init_conf *conf)
3812 {
3813         struct iwl_priv *priv = hw->priv;
3814         unsigned long flags;
3815         DECLARE_MAC_BUF(mac);
3816
3817         IWL_DEBUG_MAC80211("enter: type %d\n", conf->type);
3818
3819         if (priv->vif) {
3820                 IWL_DEBUG_MAC80211("leave - vif != NULL\n");
3821                 return -EOPNOTSUPP;
3822         }
3823
3824         spin_lock_irqsave(&priv->lock, flags);
3825         priv->vif = conf->vif;
3826
3827         spin_unlock_irqrestore(&priv->lock, flags);
3828
3829         mutex_lock(&priv->mutex);
3830
3831         if (conf->mac_addr) {
3832                 IWL_DEBUG_MAC80211("Set %s\n", print_mac(mac, conf->mac_addr));
3833                 memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN);
3834         }
3835
3836         if (iwl4965_set_mode(priv, conf->type) == -EAGAIN)
3837                 /* we are not ready, will run again when ready */
3838                 set_bit(STATUS_MODE_PENDING, &priv->status);
3839
3840         mutex_unlock(&priv->mutex);
3841
3842         IWL_DEBUG_MAC80211("leave\n");
3843         return 0;
3844 }
3845
3846 /**
3847  * iwl4965_mac_config - mac80211 config callback
3848  *
3849  * We ignore conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME since it seems to
3850  * be set inappropriately and the driver currently sets the hardware up to
3851  * use it whenever needed.
3852  */
3853 static int iwl4965_mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf)
3854 {
3855         struct iwl_priv *priv = hw->priv;
3856         const struct iwl_channel_info *ch_info;
3857         unsigned long flags;
3858         int ret = 0;
3859         u16 channel;
3860
3861         mutex_lock(&priv->mutex);
3862         IWL_DEBUG_MAC80211("enter to channel %d\n", conf->channel->hw_value);
3863
3864         priv->add_radiotap = !!(conf->flags & IEEE80211_CONF_RADIOTAP);
3865
3866
3867         if (priv->cfg->ops->lib->radio_kill_sw &&
3868             priv->cfg->ops->lib->radio_kill_sw(priv, !conf->radio_enabled)) {
3869                 IWL_DEBUG_MAC80211("leave - RF-KILL - waiting for uCode\n");
3870                 mutex_unlock(&priv->mutex);
3871         }
3872
3873         if (!iwl_is_ready(priv)) {
3874                 IWL_DEBUG_MAC80211("leave - not ready\n");
3875                 ret = -EIO;
3876                 goto out;
3877         }
3878
3879         if (unlikely(!priv->cfg->mod_params->disable_hw_scan &&
3880                      test_bit(STATUS_SCANNING, &priv->status))) {
3881                 IWL_DEBUG_MAC80211("leave - scanning\n");
3882                 set_bit(STATUS_CONF_PENDING, &priv->status);
3883                 mutex_unlock(&priv->mutex);
3884                 return 0;
3885         }
3886
3887         channel = ieee80211_frequency_to_channel(conf->channel->center_freq);
3888         ch_info = iwl_get_channel_info(priv, conf->channel->band, channel);
3889         if (!is_channel_valid(ch_info)) {
3890                 IWL_DEBUG_MAC80211("leave - invalid channel\n");
3891                 ret = -EINVAL;
3892                 goto out;
3893         }
3894
3895         spin_lock_irqsave(&priv->lock, flags);
3896
3897         /* if we are switching from ht to 2.4 clear flags
3898          * from any ht related info since 2.4 does not
3899          * support ht */
3900         if ((le16_to_cpu(priv->staging_rxon.channel) != channel)
3901 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
3902             && !(conf->flags & IEEE80211_CONF_CHANNEL_SWITCH)
3903 #endif
3904         )
3905                 priv->staging_rxon.flags = 0;
3906
3907         iwl_set_rxon_channel(priv, conf->channel->band, channel);
3908
3909         iwl_set_flags_for_band(priv, conf->channel->band);
3910
3911         /* The list of supported rates and rate mask can be different
3912          * for each band; since the band may have changed, reset
3913          * the rate mask to what mac80211 lists */
3914         iwl4965_set_rate(priv);
3915
3916         spin_unlock_irqrestore(&priv->lock, flags);
3917
3918 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
3919         if (conf->flags & IEEE80211_CONF_CHANNEL_SWITCH) {
3920                 iwl4965_hw_channel_switch(priv, conf->channel);
3921                 goto out;
3922         }
3923 #endif
3924
3925         if (!conf->radio_enabled) {
3926                 IWL_DEBUG_MAC80211("leave - radio disabled\n");
3927                 goto out;
3928         }
3929
3930         if (iwl_is_rfkill(priv)) {
3931                 IWL_DEBUG_MAC80211("leave - RF kill\n");
3932                 ret = -EIO;
3933                 goto out;
3934         }
3935
3936         iwl4965_set_rate(priv);
3937
3938         if (memcmp(&priv->active_rxon,
3939                    &priv->staging_rxon, sizeof(priv->staging_rxon)))
3940                 iwl4965_commit_rxon(priv);
3941         else
3942                 IWL_DEBUG_INFO("No re-sending same RXON configuration.\n");
3943
3944         IWL_DEBUG_MAC80211("leave\n");
3945
3946 out:
3947         clear_bit(STATUS_CONF_PENDING, &priv->status);
3948         mutex_unlock(&priv->mutex);
3949         return ret;
3950 }
3951
3952 static void iwl4965_config_ap(struct iwl_priv *priv)
3953 {
3954         int ret = 0;
3955
3956         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3957                 return;
3958
3959         /* The following should be done only at AP bring up */
3960         if ((priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) == 0) {
3961
3962                 /* RXON - unassoc (to set timing command) */
3963                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3964                 iwl4965_commit_rxon(priv);
3965
3966                 /* RXON Timing */
3967                 memset(&priv->rxon_timing, 0, sizeof(struct iwl4965_rxon_time_cmd));
3968                 iwl4965_setup_rxon_timing(priv);
3969                 ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
3970                                 sizeof(priv->rxon_timing), &priv->rxon_timing);
3971                 if (ret)
3972                         IWL_WARNING("REPLY_RXON_TIMING failed - "
3973                                         "Attempting to continue.\n");
3974
3975                 iwl_set_rxon_chain(priv);
3976
3977                 /* FIXME: what should be the assoc_id for AP? */
3978                 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
3979                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
3980                         priv->staging_rxon.flags |=
3981                                 RXON_FLG_SHORT_PREAMBLE_MSK;
3982                 else
3983                         priv->staging_rxon.flags &=
3984                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
3985
3986                 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
3987                         if (priv->assoc_capability &
3988                                 WLAN_CAPABILITY_SHORT_SLOT_TIME)
3989                                 priv->staging_rxon.flags |=
3990                                         RXON_FLG_SHORT_SLOT_MSK;
3991                         else
3992                                 priv->staging_rxon.flags &=
3993                                         ~RXON_FLG_SHORT_SLOT_MSK;
3994
3995                         if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
3996                                 priv->staging_rxon.flags &=
3997                                         ~RXON_FLG_SHORT_SLOT_MSK;
3998                 }
3999                 /* restore RXON assoc */
4000                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
4001                 iwl4965_commit_rxon(priv);
4002                 iwl4965_activate_qos(priv, 1);
4003                 iwl_rxon_add_station(priv, iwl_bcast_addr, 0);
4004         }
4005         iwl4965_send_beacon_cmd(priv);
4006
4007         /* FIXME - we need to add code here to detect a totally new
4008          * configuration, reset the AP, unassoc, rxon timing, assoc,
4009          * clear sta table, add BCAST sta... */
4010 }
4011
4012 static int iwl4965_mac_config_interface(struct ieee80211_hw *hw,
4013                                         struct ieee80211_vif *vif,
4014                                     struct ieee80211_if_conf *conf)
4015 {
4016         struct iwl_priv *priv = hw->priv;
4017         DECLARE_MAC_BUF(mac);
4018         unsigned long flags;
4019         int rc;
4020
4021         if (conf == NULL)
4022                 return -EIO;
4023
4024         if (priv->vif != vif) {
4025                 IWL_DEBUG_MAC80211("leave - priv->vif != vif\n");
4026                 return 0;
4027         }
4028
4029         if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
4030             (!conf->beacon || !conf->ssid_len)) {
4031                 IWL_DEBUG_MAC80211
4032                     ("Leaving in AP mode because HostAPD is not ready.\n");
4033                 return 0;
4034         }
4035
4036         if (!iwl_is_alive(priv))
4037                 return -EAGAIN;
4038
4039         mutex_lock(&priv->mutex);
4040
4041         if (conf->bssid)
4042                 IWL_DEBUG_MAC80211("bssid: %s\n",
4043                                    print_mac(mac, conf->bssid));
4044
4045 /*
4046  * very dubious code was here; the probe filtering flag is never set:
4047  *
4048         if (unlikely(test_bit(STATUS_SCANNING, &priv->status)) &&
4049             !(priv->hw->flags & IEEE80211_HW_NO_PROBE_FILTERING)) {
4050  */
4051
4052         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
4053                 if (!conf->bssid) {
4054                         conf->bssid = priv->mac_addr;
4055                         memcpy(priv->bssid, priv->mac_addr, ETH_ALEN);
4056                         IWL_DEBUG_MAC80211("bssid was set to: %s\n",
4057                                            print_mac(mac, conf->bssid));
4058                 }
4059                 if (priv->ibss_beacon)
4060                         dev_kfree_skb(priv->ibss_beacon);
4061
4062                 priv->ibss_beacon = conf->beacon;
4063         }
4064
4065         if (iwl_is_rfkill(priv))
4066                 goto done;
4067
4068         if (conf->bssid && !is_zero_ether_addr(conf->bssid) &&
4069             !is_multicast_ether_addr(conf->bssid)) {
4070                 /* If there is currently a HW scan going on in the background
4071                  * then we need to cancel it else the RXON below will fail. */
4072                 if (iwl4965_scan_cancel_timeout(priv, 100)) {
4073                         IWL_WARNING("Aborted scan still in progress "
4074                                     "after 100ms\n");
4075                         IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
4076                         mutex_unlock(&priv->mutex);
4077                         return -EAGAIN;
4078                 }
4079                 memcpy(priv->staging_rxon.bssid_addr, conf->bssid, ETH_ALEN);
4080
4081                 /* TODO: Audit driver for usage of these members and see
4082                  * if mac80211 deprecates them (priv->bssid looks like it
4083                  * shouldn't be there, but I haven't scanned the IBSS code
4084                  * to verify) - jpk */
4085                 memcpy(priv->bssid, conf->bssid, ETH_ALEN);
4086
4087                 if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
4088                         iwl4965_config_ap(priv);
4089                 else {
4090                         rc = iwl4965_commit_rxon(priv);
4091                         if ((priv->iw_mode == IEEE80211_IF_TYPE_STA) && rc)
4092                                 iwl_rxon_add_station(
4093                                         priv, priv->active_rxon.bssid_addr, 1);
4094                 }
4095
4096         } else {
4097                 iwl4965_scan_cancel_timeout(priv, 100);
4098                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
4099                 iwl4965_commit_rxon(priv);
4100         }
4101
4102  done:
4103         spin_lock_irqsave(&priv->lock, flags);
4104         if (!conf->ssid_len)
4105                 memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
4106         else
4107                 memcpy(priv->essid, conf->ssid, conf->ssid_len);
4108
4109         priv->essid_len = conf->ssid_len;
4110         spin_unlock_irqrestore(&priv->lock, flags);
4111
4112         IWL_DEBUG_MAC80211("leave\n");
4113         mutex_unlock(&priv->mutex);
4114
4115         return 0;
4116 }
4117
4118 static void iwl4965_configure_filter(struct ieee80211_hw *hw,
4119                                  unsigned int changed_flags,
4120                                  unsigned int *total_flags,
4121                                  int mc_count, struct dev_addr_list *mc_list)
4122 {
4123         /*
4124          * XXX: dummy
4125          * see also iwl4965_connection_init_rx_config
4126          */
4127         struct iwl_priv *priv = hw->priv;
4128         int new_flags = 0;
4129         if (changed_flags & (FIF_PROMISC_IN_BSS | FIF_OTHER_BSS)) {
4130                 if (*total_flags & (FIF_PROMISC_IN_BSS | FIF_OTHER_BSS)) {
4131                         IWL_DEBUG_MAC80211("Enter: type %d (0x%x, 0x%x)\n",
4132                                            IEEE80211_IF_TYPE_MNTR,
4133                                            changed_flags, *total_flags);
4134                         /* queue work 'cuz mac80211 is holding a lock which
4135                          * prevents us from issuing (synchronous) f/w cmds */
4136                         queue_work(priv->workqueue, &priv->set_monitor);
4137                         new_flags &= FIF_PROMISC_IN_BSS |
4138                                      FIF_OTHER_BSS |
4139                                      FIF_ALLMULTI;
4140                 }
4141         }
4142         *total_flags = new_flags;
4143 }
4144
4145 static void iwl4965_mac_remove_interface(struct ieee80211_hw *hw,
4146                                      struct ieee80211_if_init_conf *conf)
4147 {
4148         struct iwl_priv *priv = hw->priv;
4149
4150         IWL_DEBUG_MAC80211("enter\n");
4151
4152         mutex_lock(&priv->mutex);
4153
4154         if (iwl_is_ready_rf(priv)) {
4155                 iwl4965_scan_cancel_timeout(priv, 100);
4156                 cancel_delayed_work(&priv->post_associate);
4157                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
4158                 iwl4965_commit_rxon(priv);
4159         }
4160         if (priv->vif == conf->vif) {
4161                 priv->vif = NULL;
4162                 memset(priv->bssid, 0, ETH_ALEN);
4163                 memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
4164                 priv->essid_len = 0;
4165         }
4166         mutex_unlock(&priv->mutex);
4167
4168         IWL_DEBUG_MAC80211("leave\n");
4169
4170 }
4171
4172 #define IWL_DELAY_NEXT_SCAN_AFTER_ASSOC (HZ*6)
4173 static void iwl4965_bss_info_changed(struct ieee80211_hw *hw,
4174                                      struct ieee80211_vif *vif,
4175                                      struct ieee80211_bss_conf *bss_conf,
4176                                      u32 changes)
4177 {
4178         struct iwl_priv *priv = hw->priv;
4179
4180         IWL_DEBUG_MAC80211("changes = 0x%X\n", changes);
4181
4182         if (changes & BSS_CHANGED_ERP_PREAMBLE) {
4183                 IWL_DEBUG_MAC80211("ERP_PREAMBLE %d\n",
4184                                    bss_conf->use_short_preamble);
4185                 if (bss_conf->use_short_preamble)
4186                         priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
4187                 else
4188                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
4189         }
4190
4191         if (changes & BSS_CHANGED_ERP_CTS_PROT) {
4192                 IWL_DEBUG_MAC80211("ERP_CTS %d\n", bss_conf->use_cts_prot);
4193                 if (bss_conf->use_cts_prot && (priv->band != IEEE80211_BAND_5GHZ))
4194                         priv->staging_rxon.flags |= RXON_FLG_TGG_PROTECT_MSK;
4195                 else
4196                         priv->staging_rxon.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
4197         }
4198
4199         if (changes & BSS_CHANGED_HT) {
4200                 IWL_DEBUG_MAC80211("HT %d\n", bss_conf->assoc_ht);
4201                 iwl4965_ht_conf(priv, bss_conf);
4202                 iwl_set_rxon_chain(priv);
4203         }
4204
4205         if (changes & BSS_CHANGED_ASSOC) {
4206                 IWL_DEBUG_MAC80211("ASSOC %d\n", bss_conf->assoc);
4207                 /* This should never happen as this function should
4208                  * never be called from interrupt context. */
4209                 if (WARN_ON_ONCE(in_interrupt()))
4210                         return;
4211                 if (bss_conf->assoc) {
4212                         priv->assoc_id = bss_conf->aid;
4213                         priv->beacon_int = bss_conf->beacon_int;
4214                         priv->timestamp = bss_conf->timestamp;
4215                         priv->assoc_capability = bss_conf->assoc_capability;
4216                         priv->next_scan_jiffies = jiffies +
4217                                         IWL_DELAY_NEXT_SCAN_AFTER_ASSOC;
4218                         mutex_lock(&priv->mutex);
4219                         iwl4965_post_associate(priv);
4220                         mutex_unlock(&priv->mutex);
4221                 } else {
4222                         priv->assoc_id = 0;
4223                         IWL_DEBUG_MAC80211("DISASSOC %d\n", bss_conf->assoc);
4224                 }
4225         } else if (changes && iwl_is_associated(priv) && priv->assoc_id) {
4226                         IWL_DEBUG_MAC80211("Associated Changes %d\n", changes);
4227                         iwl_send_rxon_assoc(priv);
4228         }
4229
4230 }
4231
4232 static int iwl4965_mac_hw_scan(struct ieee80211_hw *hw, u8 *ssid, size_t len)
4233 {
4234         int rc = 0;
4235         unsigned long flags;
4236         struct iwl_priv *priv = hw->priv;
4237
4238         IWL_DEBUG_MAC80211("enter\n");
4239
4240         mutex_lock(&priv->mutex);
4241         spin_lock_irqsave(&priv->lock, flags);
4242
4243         if (!iwl_is_ready_rf(priv)) {
4244                 rc = -EIO;
4245                 IWL_DEBUG_MAC80211("leave - not ready or exit pending\n");
4246                 goto out_unlock;
4247         }
4248
4249         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {    /* APs don't scan */
4250                 rc = -EIO;
4251                 IWL_ERROR("ERROR: APs don't scan\n");
4252                 goto out_unlock;
4253         }
4254
4255         /* we don't schedule scan within next_scan_jiffies period */
4256         if (priv->next_scan_jiffies &&
4257                         time_after(priv->next_scan_jiffies, jiffies)) {
4258                 rc = -EAGAIN;
4259                 goto out_unlock;
4260         }
4261         /* if we just finished scan ask for delay */
4262         if (priv->last_scan_jiffies && time_after(priv->last_scan_jiffies +
4263                                 IWL_DELAY_NEXT_SCAN, jiffies)) {
4264                 rc = -EAGAIN;
4265                 goto out_unlock;
4266         }
4267         if (len) {
4268                 IWL_DEBUG_SCAN("direct scan for %s [%d]\n ",
4269                                iwl4965_escape_essid(ssid, len), (int)len);
4270
4271                 priv->one_direct_scan = 1;
4272                 priv->direct_ssid_len = (u8)
4273                     min((u8) len, (u8) IW_ESSID_MAX_SIZE);
4274                 memcpy(priv->direct_ssid, ssid, priv->direct_ssid_len);
4275         } else
4276                 priv->one_direct_scan = 0;
4277
4278         rc = iwl4965_scan_initiate(priv);
4279
4280         IWL_DEBUG_MAC80211("leave\n");
4281
4282 out_unlock:
4283         spin_unlock_irqrestore(&priv->lock, flags);
4284         mutex_unlock(&priv->mutex);
4285
4286         return rc;
4287 }
4288
4289 static void iwl4965_mac_update_tkip_key(struct ieee80211_hw *hw,
4290                         struct ieee80211_key_conf *keyconf, const u8 *addr,
4291                         u32 iv32, u16 *phase1key)
4292 {
4293         struct iwl_priv *priv = hw->priv;
4294         u8 sta_id = IWL_INVALID_STATION;
4295         unsigned long flags;
4296         __le16 key_flags = 0;
4297         int i;
4298         DECLARE_MAC_BUF(mac);
4299
4300         IWL_DEBUG_MAC80211("enter\n");
4301
4302         sta_id = iwl_find_station(priv, addr);
4303         if (sta_id == IWL_INVALID_STATION) {
4304                 IWL_DEBUG_MAC80211("leave - %s not in station map.\n",
4305                                    print_mac(mac, addr));
4306                 return;
4307         }
4308
4309         iwl4965_scan_cancel_timeout(priv, 100);
4310
4311         key_flags |= (STA_KEY_FLG_TKIP | STA_KEY_FLG_MAP_KEY_MSK);
4312         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
4313         key_flags &= ~STA_KEY_FLG_INVALID;
4314
4315         if (sta_id == priv->hw_params.bcast_sta_id)
4316                 key_flags |= STA_KEY_MULTICAST_MSK;
4317
4318         spin_lock_irqsave(&priv->sta_lock, flags);
4319
4320         priv->stations[sta_id].sta.key.key_flags = key_flags;
4321         priv->stations[sta_id].sta.key.tkip_rx_tsc_byte2 = (u8) iv32;
4322
4323         for (i = 0; i < 5; i++)
4324                 priv->stations[sta_id].sta.key.tkip_rx_ttak[i] =
4325                         cpu_to_le16(phase1key[i]);
4326
4327         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
4328         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
4329
4330         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
4331
4332         spin_unlock_irqrestore(&priv->sta_lock, flags);
4333
4334         IWL_DEBUG_MAC80211("leave\n");
4335 }
4336
4337 static int iwl4965_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
4338                            const u8 *local_addr, const u8 *addr,
4339                            struct ieee80211_key_conf *key)
4340 {
4341         struct iwl_priv *priv = hw->priv;
4342         DECLARE_MAC_BUF(mac);
4343         int ret = 0;
4344         u8 sta_id = IWL_INVALID_STATION;
4345         u8 is_default_wep_key = 0;
4346
4347         IWL_DEBUG_MAC80211("enter\n");
4348
4349         if (priv->hw_params.sw_crypto) {
4350                 IWL_DEBUG_MAC80211("leave - hwcrypto disabled\n");
4351                 return -EOPNOTSUPP;
4352         }
4353
4354         if (is_zero_ether_addr(addr))
4355                 /* only support pairwise keys */
4356                 return -EOPNOTSUPP;
4357
4358         sta_id = iwl_find_station(priv, addr);
4359         if (sta_id == IWL_INVALID_STATION) {
4360                 IWL_DEBUG_MAC80211("leave - %s not in station map.\n",
4361                                    print_mac(mac, addr));
4362                 return -EINVAL;
4363
4364         }
4365
4366         mutex_lock(&priv->mutex);
4367         iwl4965_scan_cancel_timeout(priv, 100);
4368         mutex_unlock(&priv->mutex);
4369
4370         /* If we are getting WEP group key and we didn't receive any key mapping
4371          * so far, we are in legacy wep mode (group key only), otherwise we are
4372          * in 1X mode.
4373          * In legacy wep mode, we use another host command to the uCode */
4374         if (key->alg == ALG_WEP && sta_id == priv->hw_params.bcast_sta_id &&
4375                 priv->iw_mode != IEEE80211_IF_TYPE_AP) {
4376                 if (cmd == SET_KEY)
4377                         is_default_wep_key = !priv->key_mapping_key;
4378                 else
4379                         is_default_wep_key =
4380                                         (key->hw_key_idx == HW_KEY_DEFAULT);
4381         }
4382
4383         switch (cmd) {
4384         case SET_KEY:
4385                 if (is_default_wep_key)
4386                         ret = iwl_set_default_wep_key(priv, key);
4387                 else
4388                         ret = iwl_set_dynamic_key(priv, key, sta_id);
4389
4390                 IWL_DEBUG_MAC80211("enable hwcrypto key\n");
4391                 break;
4392         case DISABLE_KEY:
4393                 if (is_default_wep_key)
4394                         ret = iwl_remove_default_wep_key(priv, key);
4395                 else
4396                         ret = iwl_remove_dynamic_key(priv, key, sta_id);
4397
4398                 IWL_DEBUG_MAC80211("disable hwcrypto key\n");
4399                 break;
4400         default:
4401                 ret = -EINVAL;
4402         }
4403
4404         IWL_DEBUG_MAC80211("leave\n");
4405
4406         return ret;
4407 }
4408
4409 static int iwl4965_mac_conf_tx(struct ieee80211_hw *hw, u16 queue,
4410                            const struct ieee80211_tx_queue_params *params)
4411 {
4412         struct iwl_priv *priv = hw->priv;
4413         unsigned long flags;
4414         int q;
4415
4416         IWL_DEBUG_MAC80211("enter\n");
4417
4418         if (!iwl_is_ready_rf(priv)) {
4419                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
4420                 return -EIO;
4421         }
4422
4423         if (queue >= AC_NUM) {
4424                 IWL_DEBUG_MAC80211("leave - queue >= AC_NUM %d\n", queue);
4425                 return 0;
4426         }
4427
4428         if (!priv->qos_data.qos_enable) {
4429                 priv->qos_data.qos_active = 0;
4430                 IWL_DEBUG_MAC80211("leave - qos not enabled\n");
4431                 return 0;
4432         }
4433         q = AC_NUM - 1 - queue;
4434
4435         spin_lock_irqsave(&priv->lock, flags);
4436
4437         priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min);
4438         priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max);
4439         priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
4440         priv->qos_data.def_qos_parm.ac[q].edca_txop =
4441                         cpu_to_le16((params->txop * 32));
4442
4443         priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
4444         priv->qos_data.qos_active = 1;
4445
4446         spin_unlock_irqrestore(&priv->lock, flags);
4447
4448         mutex_lock(&priv->mutex);
4449         if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
4450                 iwl4965_activate_qos(priv, 1);
4451         else if (priv->assoc_id && iwl_is_associated(priv))
4452                 iwl4965_activate_qos(priv, 0);
4453
4454         mutex_unlock(&priv->mutex);
4455
4456         IWL_DEBUG_MAC80211("leave\n");
4457         return 0;
4458 }
4459
4460 static int iwl4965_mac_get_tx_stats(struct ieee80211_hw *hw,
4461                                 struct ieee80211_tx_queue_stats *stats)
4462 {
4463         struct iwl_priv *priv = hw->priv;
4464         int i, avail;
4465         struct iwl_tx_queue *txq;
4466         struct iwl_queue *q;
4467         unsigned long flags;
4468
4469         IWL_DEBUG_MAC80211("enter\n");
4470
4471         if (!iwl_is_ready_rf(priv)) {
4472                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
4473                 return -EIO;
4474         }
4475
4476         spin_lock_irqsave(&priv->lock, flags);
4477
4478         for (i = 0; i < AC_NUM; i++) {
4479                 txq = &priv->txq[i];
4480                 q = &txq->q;
4481                 avail = iwl_queue_space(q);
4482
4483                 stats[i].len = q->n_window - avail;
4484                 stats[i].limit = q->n_window - q->high_mark;
4485                 stats[i].count = q->n_window;
4486
4487         }
4488         spin_unlock_irqrestore(&priv->lock, flags);
4489
4490         IWL_DEBUG_MAC80211("leave\n");
4491
4492         return 0;
4493 }
4494
4495 static int iwl4965_mac_get_stats(struct ieee80211_hw *hw,
4496                              struct ieee80211_low_level_stats *stats)
4497 {
4498         struct iwl_priv *priv = hw->priv;
4499
4500         priv = hw->priv;
4501         IWL_DEBUG_MAC80211("enter\n");
4502         IWL_DEBUG_MAC80211("leave\n");
4503
4504         return 0;
4505 }
4506
4507 static u64 iwl4965_mac_get_tsf(struct ieee80211_hw *hw)
4508 {
4509         struct iwl_priv *priv;
4510
4511         priv = hw->priv;
4512         IWL_DEBUG_MAC80211("enter\n");
4513         IWL_DEBUG_MAC80211("leave\n");
4514
4515         return 0;
4516 }
4517
4518 static void iwl4965_mac_reset_tsf(struct ieee80211_hw *hw)
4519 {
4520         struct iwl_priv *priv = hw->priv;
4521         unsigned long flags;
4522
4523         mutex_lock(&priv->mutex);
4524         IWL_DEBUG_MAC80211("enter\n");
4525
4526         priv->lq_mngr.lq_ready = 0;
4527         spin_lock_irqsave(&priv->lock, flags);
4528         memset(&priv->current_ht_config, 0, sizeof(struct iwl_ht_info));
4529         spin_unlock_irqrestore(&priv->lock, flags);
4530
4531         iwl_reset_qos(priv);
4532
4533         cancel_delayed_work(&priv->post_associate);
4534
4535         spin_lock_irqsave(&priv->lock, flags);
4536         priv->assoc_id = 0;
4537         priv->assoc_capability = 0;
4538         priv->assoc_station_added = 0;
4539
4540         /* new association get rid of ibss beacon skb */
4541         if (priv->ibss_beacon)
4542                 dev_kfree_skb(priv->ibss_beacon);
4543
4544         priv->ibss_beacon = NULL;
4545
4546         priv->beacon_int = priv->hw->conf.beacon_int;
4547         priv->timestamp = 0;
4548         if ((priv->iw_mode == IEEE80211_IF_TYPE_STA))
4549                 priv->beacon_int = 0;
4550
4551         spin_unlock_irqrestore(&priv->lock, flags);
4552
4553         if (!iwl_is_ready_rf(priv)) {
4554                 IWL_DEBUG_MAC80211("leave - not ready\n");
4555                 mutex_unlock(&priv->mutex);
4556                 return;
4557         }
4558
4559         /* we are restarting association process
4560          * clear RXON_FILTER_ASSOC_MSK bit
4561          */
4562         if (priv->iw_mode != IEEE80211_IF_TYPE_AP) {
4563                 iwl4965_scan_cancel_timeout(priv, 100);
4564                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
4565                 iwl4965_commit_rxon(priv);
4566         }
4567
4568         iwl_power_update_mode(priv, 0);
4569
4570         /* Per mac80211.h: This is only used in IBSS mode... */
4571         if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
4572
4573                 IWL_DEBUG_MAC80211("leave - not in IBSS\n");
4574                 mutex_unlock(&priv->mutex);
4575                 return;
4576         }
4577
4578         iwl4965_set_rate(priv);
4579
4580         mutex_unlock(&priv->mutex);
4581
4582         IWL_DEBUG_MAC80211("leave\n");
4583 }
4584
4585 static int iwl4965_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb)
4586 {
4587         struct iwl_priv *priv = hw->priv;
4588         unsigned long flags;
4589
4590         mutex_lock(&priv->mutex);
4591         IWL_DEBUG_MAC80211("enter\n");
4592
4593         if (!iwl_is_ready_rf(priv)) {
4594                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
4595                 mutex_unlock(&priv->mutex);
4596                 return -EIO;
4597         }
4598
4599         if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
4600                 IWL_DEBUG_MAC80211("leave - not IBSS\n");
4601                 mutex_unlock(&priv->mutex);
4602                 return -EIO;
4603         }
4604
4605         spin_lock_irqsave(&priv->lock, flags);
4606
4607         if (priv->ibss_beacon)
4608                 dev_kfree_skb(priv->ibss_beacon);
4609
4610         priv->ibss_beacon = skb;
4611
4612         priv->assoc_id = 0;
4613
4614         IWL_DEBUG_MAC80211("leave\n");
4615         spin_unlock_irqrestore(&priv->lock, flags);
4616
4617         iwl_reset_qos(priv);
4618
4619         iwl4965_post_associate(priv);
4620
4621         mutex_unlock(&priv->mutex);
4622
4623         return 0;
4624 }
4625
4626 /*****************************************************************************
4627  *
4628  * sysfs attributes
4629  *
4630  *****************************************************************************/
4631
4632 #ifdef CONFIG_IWLWIFI_DEBUG
4633
4634 /*
4635  * The following adds a new attribute to the sysfs representation
4636  * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
4637  * used for controlling the debug level.
4638  *
4639  * See the level definitions in iwl for details.
4640  */
4641
4642 static ssize_t show_debug_level(struct device *d,
4643                                 struct device_attribute *attr, char *buf)
4644 {
4645         struct iwl_priv *priv = d->driver_data;
4646
4647         return sprintf(buf, "0x%08X\n", priv->debug_level);
4648 }
4649 static ssize_t store_debug_level(struct device *d,
4650                                 struct device_attribute *attr,
4651                                  const char *buf, size_t count)
4652 {
4653         struct iwl_priv *priv = d->driver_data;
4654         char *p = (char *)buf;
4655         u32 val;
4656
4657         val = simple_strtoul(p, &p, 0);
4658         if (p == buf)
4659                 printk(KERN_INFO DRV_NAME
4660                        ": %s is not in hex or decimal form.\n", buf);
4661         else
4662                 priv->debug_level = val;
4663
4664         return strnlen(buf, count);
4665 }
4666
4667 static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO,
4668                         show_debug_level, store_debug_level);
4669
4670
4671 #endif /* CONFIG_IWLWIFI_DEBUG */
4672
4673
4674 static ssize_t show_version(struct device *d,
4675                                 struct device_attribute *attr, char *buf)
4676 {
4677         struct iwl_priv *priv = d->driver_data;
4678         struct iwl_alive_resp *palive = &priv->card_alive;
4679
4680         if (palive->is_valid)
4681                 return sprintf(buf, "fw version: 0x%01X.0x%01X.0x%01X.0x%01X\n"
4682                                     "fw type: 0x%01X 0x%01X\n",
4683                                 palive->ucode_major, palive->ucode_minor,
4684                                 palive->sw_rev[0], palive->sw_rev[1],
4685                                 palive->ver_type, palive->ver_subtype);
4686
4687         else
4688                 return sprintf(buf, "fw not loaded\n");
4689 }
4690
4691 static DEVICE_ATTR(version, S_IWUSR | S_IRUGO, show_version, NULL);
4692
4693 static ssize_t show_temperature(struct device *d,
4694                                 struct device_attribute *attr, char *buf)
4695 {
4696         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
4697
4698         if (!iwl_is_alive(priv))
4699                 return -EAGAIN;
4700
4701         return sprintf(buf, "%d\n", iwl4965_hw_get_temperature(priv));
4702 }
4703
4704 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
4705
4706 static ssize_t show_rs_window(struct device *d,
4707                               struct device_attribute *attr,
4708                               char *buf)
4709 {
4710         struct iwl_priv *priv = d->driver_data;
4711         return iwl4965_fill_rs_info(priv->hw, buf, IWL_AP_ID);
4712 }
4713 static DEVICE_ATTR(rs_window, S_IRUGO, show_rs_window, NULL);
4714
4715 static ssize_t show_tx_power(struct device *d,
4716                              struct device_attribute *attr, char *buf)
4717 {
4718         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
4719         return sprintf(buf, "%d\n", priv->user_txpower_limit);
4720 }
4721
4722 static ssize_t store_tx_power(struct device *d,
4723                               struct device_attribute *attr,
4724                               const char *buf, size_t count)
4725 {
4726         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
4727         char *p = (char *)buf;
4728         u32 val;
4729
4730         val = simple_strtoul(p, &p, 10);
4731         if (p == buf)
4732                 printk(KERN_INFO DRV_NAME
4733                        ": %s is not in decimal form.\n", buf);
4734         else
4735                 iwl4965_hw_reg_set_txpower(priv, val);
4736
4737         return count;
4738 }
4739
4740 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
4741
4742 static ssize_t show_flags(struct device *d,
4743                           struct device_attribute *attr, char *buf)
4744 {
4745         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
4746
4747         return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
4748 }
4749
4750 static ssize_t store_flags(struct device *d,
4751                            struct device_attribute *attr,
4752                            const char *buf, size_t count)
4753 {
4754         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
4755         u32 flags = simple_strtoul(buf, NULL, 0);
4756
4757         mutex_lock(&priv->mutex);
4758         if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
4759                 /* Cancel any currently running scans... */
4760                 if (iwl4965_scan_cancel_timeout(priv, 100))
4761                         IWL_WARNING("Could not cancel scan.\n");
4762                 else {
4763                         IWL_DEBUG_INFO("Committing rxon.flags = 0x%04X\n",
4764                                        flags);
4765                         priv->staging_rxon.flags = cpu_to_le32(flags);
4766                         iwl4965_commit_rxon(priv);
4767                 }
4768         }
4769         mutex_unlock(&priv->mutex);
4770
4771         return count;
4772 }
4773
4774 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
4775
4776 static ssize_t show_filter_flags(struct device *d,
4777                                  struct device_attribute *attr, char *buf)
4778 {
4779         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
4780
4781         return sprintf(buf, "0x%04X\n",
4782                 le32_to_cpu(priv->active_rxon.filter_flags));
4783 }
4784
4785 static ssize_t store_filter_flags(struct device *d,
4786                                   struct device_attribute *attr,
4787                                   const char *buf, size_t count)
4788 {
4789         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
4790         u32 filter_flags = simple_strtoul(buf, NULL, 0);
4791
4792         mutex_lock(&priv->mutex);
4793         if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
4794                 /* Cancel any currently running scans... */
4795                 if (iwl4965_scan_cancel_timeout(priv, 100))
4796                         IWL_WARNING("Could not cancel scan.\n");
4797                 else {
4798                         IWL_DEBUG_INFO("Committing rxon.filter_flags = "
4799                                        "0x%04X\n", filter_flags);
4800                         priv->staging_rxon.filter_flags =
4801                                 cpu_to_le32(filter_flags);
4802                         iwl4965_commit_rxon(priv);
4803                 }
4804         }
4805         mutex_unlock(&priv->mutex);
4806
4807         return count;
4808 }
4809
4810 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
4811                    store_filter_flags);
4812
4813 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
4814
4815 static ssize_t show_measurement(struct device *d,
4816                                 struct device_attribute *attr, char *buf)
4817 {
4818         struct iwl_priv *priv = dev_get_drvdata(d);
4819         struct iwl4965_spectrum_notification measure_report;
4820         u32 size = sizeof(measure_report), len = 0, ofs = 0;
4821         u8 *data = (u8 *) & measure_report;
4822         unsigned long flags;
4823
4824         spin_lock_irqsave(&priv->lock, flags);
4825         if (!(priv->measurement_status & MEASUREMENT_READY)) {
4826                 spin_unlock_irqrestore(&priv->lock, flags);
4827                 return 0;
4828         }
4829         memcpy(&measure_report, &priv->measure_report, size);
4830         priv->measurement_status = 0;
4831         spin_unlock_irqrestore(&priv->lock, flags);
4832
4833         while (size && (PAGE_SIZE - len)) {
4834                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
4835                                    PAGE_SIZE - len, 1);
4836                 len = strlen(buf);
4837                 if (PAGE_SIZE - len)
4838                         buf[len++] = '\n';
4839
4840                 ofs += 16;
4841                 size -= min(size, 16U);
4842         }
4843
4844         return len;
4845 }
4846
4847 static ssize_t store_measurement(struct device *d,
4848                                  struct device_attribute *attr,
4849                                  const char *buf, size_t count)
4850 {
4851         struct iwl_priv *priv = dev_get_drvdata(d);
4852         struct ieee80211_measurement_params params = {
4853                 .channel = le16_to_cpu(priv->active_rxon.channel),
4854                 .start_time = cpu_to_le64(priv->last_tsf),
4855                 .duration = cpu_to_le16(1),
4856         };
4857         u8 type = IWL_MEASURE_BASIC;
4858         u8 buffer[32];
4859         u8 channel;
4860
4861         if (count) {
4862                 char *p = buffer;
4863                 strncpy(buffer, buf, min(sizeof(buffer), count));
4864                 channel = simple_strtoul(p, NULL, 0);
4865                 if (channel)
4866                         params.channel = channel;
4867
4868                 p = buffer;
4869                 while (*p && *p != ' ')
4870                         p++;
4871                 if (*p)
4872                         type = simple_strtoul(p + 1, NULL, 0);
4873         }
4874
4875         IWL_DEBUG_INFO("Invoking measurement of type %d on "
4876                        "channel %d (for '%s')\n", type, params.channel, buf);
4877         iwl4965_get_measurement(priv, &params, type);
4878
4879         return count;
4880 }
4881
4882 static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
4883                    show_measurement, store_measurement);
4884 #endif /* CONFIG_IWL4965_SPECTRUM_MEASUREMENT */
4885
4886 static ssize_t store_retry_rate(struct device *d,
4887                                 struct device_attribute *attr,
4888                                 const char *buf, size_t count)
4889 {
4890         struct iwl_priv *priv = dev_get_drvdata(d);
4891
4892         priv->retry_rate = simple_strtoul(buf, NULL, 0);
4893         if (priv->retry_rate <= 0)
4894                 priv->retry_rate = 1;
4895
4896         return count;
4897 }
4898
4899 static ssize_t show_retry_rate(struct device *d,
4900                                struct device_attribute *attr, char *buf)
4901 {
4902         struct iwl_priv *priv = dev_get_drvdata(d);
4903         return sprintf(buf, "%d", priv->retry_rate);
4904 }
4905
4906 static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, show_retry_rate,
4907                    store_retry_rate);
4908
4909 static ssize_t store_power_level(struct device *d,
4910                                  struct device_attribute *attr,
4911                                  const char *buf, size_t count)
4912 {
4913         struct iwl_priv *priv = dev_get_drvdata(d);
4914         int rc;
4915         int mode;
4916
4917         mode = simple_strtoul(buf, NULL, 0);
4918         mutex_lock(&priv->mutex);
4919
4920         if (!iwl_is_ready(priv)) {
4921                 rc = -EAGAIN;
4922                 goto out;
4923         }
4924
4925         rc = iwl_power_set_user_mode(priv, mode);
4926         if (rc) {
4927                 IWL_DEBUG_MAC80211("failed setting power mode.\n");
4928                 goto out;
4929         }
4930         rc = count;
4931
4932  out:
4933         mutex_unlock(&priv->mutex);
4934         return rc;
4935 }
4936
4937 #define MAX_WX_STRING 80
4938
4939 /* Values are in microsecond */
4940 static const s32 timeout_duration[] = {
4941         350000,
4942         250000,
4943         75000,
4944         37000,
4945         25000,
4946 };
4947 static const s32 period_duration[] = {
4948         400000,
4949         700000,
4950         1000000,
4951         1000000,
4952         1000000
4953 };
4954
4955 static ssize_t show_power_level(struct device *d,
4956                                 struct device_attribute *attr, char *buf)
4957 {
4958         struct iwl_priv *priv = dev_get_drvdata(d);
4959         int level = priv->power_data.power_mode;
4960         char *p = buf;
4961
4962         p += sprintf(p, "%d ", level);
4963         switch (level) {
4964         case IWL_POWER_MODE_CAM:
4965         case IWL_POWER_AC:
4966                 p += sprintf(p, "(AC)");
4967                 break;
4968         case IWL_POWER_BATTERY:
4969                 p += sprintf(p, "(BATTERY)");
4970                 break;
4971         default:
4972                 p += sprintf(p,
4973                              "(Timeout %dms, Period %dms)",
4974                              timeout_duration[level - 1] / 1000,
4975                              period_duration[level - 1] / 1000);
4976         }
4977 /*
4978         if (!(priv->power_mode & IWL_POWER_ENABLED))
4979                 p += sprintf(p, " OFF\n");
4980         else
4981                 p += sprintf(p, " \n");
4982 */
4983         p += sprintf(p, " \n");
4984         return (p - buf + 1);
4985 }
4986
4987 static DEVICE_ATTR(power_level, S_IWUSR | S_IRUSR, show_power_level,
4988                    store_power_level);
4989
4990 static ssize_t show_channels(struct device *d,
4991                              struct device_attribute *attr, char *buf)
4992 {
4993         /* all this shit doesn't belong into sysfs anyway */
4994         return 0;
4995 }
4996
4997 static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL);
4998
4999 static ssize_t show_statistics(struct device *d,
5000                                struct device_attribute *attr, char *buf)
5001 {
5002         struct iwl_priv *priv = dev_get_drvdata(d);
5003         u32 size = sizeof(struct iwl4965_notif_statistics);
5004         u32 len = 0, ofs = 0;
5005         u8 *data = (u8 *) & priv->statistics;
5006         int rc = 0;
5007
5008         if (!iwl_is_alive(priv))
5009                 return -EAGAIN;
5010
5011         mutex_lock(&priv->mutex);
5012         rc = iwl_send_statistics_request(priv, 0);
5013         mutex_unlock(&priv->mutex);
5014
5015         if (rc) {
5016                 len = sprintf(buf,
5017                               "Error sending statistics request: 0x%08X\n", rc);
5018                 return len;
5019         }
5020
5021         while (size && (PAGE_SIZE - len)) {
5022                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
5023                                    PAGE_SIZE - len, 1);
5024                 len = strlen(buf);
5025                 if (PAGE_SIZE - len)
5026                         buf[len++] = '\n';
5027
5028                 ofs += 16;
5029                 size -= min(size, 16U);
5030         }
5031
5032         return len;
5033 }
5034
5035 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
5036
5037 static ssize_t show_status(struct device *d,
5038                            struct device_attribute *attr, char *buf)
5039 {
5040         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
5041         if (!iwl_is_alive(priv))
5042                 return -EAGAIN;
5043         return sprintf(buf, "0x%08x\n", (int)priv->status);
5044 }
5045
5046 static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
5047
5048 /*****************************************************************************
5049  *
5050  * driver setup and teardown
5051  *
5052  *****************************************************************************/
5053
5054 static void iwl_setup_deferred_work(struct iwl_priv *priv)
5055 {
5056         priv->workqueue = create_workqueue(DRV_NAME);
5057
5058         init_waitqueue_head(&priv->wait_command_queue);
5059
5060         INIT_WORK(&priv->up, iwl4965_bg_up);
5061         INIT_WORK(&priv->restart, iwl4965_bg_restart);
5062         INIT_WORK(&priv->rx_replenish, iwl4965_bg_rx_replenish);
5063         INIT_WORK(&priv->scan_completed, iwl4965_bg_scan_completed);
5064         INIT_WORK(&priv->request_scan, iwl4965_bg_request_scan);
5065         INIT_WORK(&priv->abort_scan, iwl4965_bg_abort_scan);
5066         INIT_WORK(&priv->rf_kill, iwl4965_bg_rf_kill);
5067         INIT_WORK(&priv->beacon_update, iwl4965_bg_beacon_update);
5068         INIT_WORK(&priv->set_monitor, iwl4965_bg_set_monitor);
5069         INIT_WORK(&priv->run_time_calib_work, iwl_bg_run_time_calib_work);
5070         INIT_DELAYED_WORK(&priv->post_associate, iwl4965_bg_post_associate);
5071         INIT_DELAYED_WORK(&priv->init_alive_start, iwl_bg_init_alive_start);
5072         INIT_DELAYED_WORK(&priv->alive_start, iwl_bg_alive_start);
5073         INIT_DELAYED_WORK(&priv->scan_check, iwl4965_bg_scan_check);
5074
5075         if (priv->cfg->ops->lib->setup_deferred_work)
5076                 priv->cfg->ops->lib->setup_deferred_work(priv);
5077
5078         init_timer(&priv->statistics_periodic);
5079         priv->statistics_periodic.data = (unsigned long)priv;
5080         priv->statistics_periodic.function = iwl4965_bg_statistics_periodic;
5081
5082         tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
5083                      iwl4965_irq_tasklet, (unsigned long)priv);
5084 }
5085
5086 static void iwl_cancel_deferred_work(struct iwl_priv *priv)
5087 {
5088         if (priv->cfg->ops->lib->cancel_deferred_work)
5089                 priv->cfg->ops->lib->cancel_deferred_work(priv);
5090
5091         cancel_delayed_work_sync(&priv->init_alive_start);
5092         cancel_delayed_work(&priv->scan_check);
5093         cancel_delayed_work(&priv->alive_start);
5094         cancel_delayed_work(&priv->post_associate);
5095         cancel_work_sync(&priv->beacon_update);
5096         del_timer_sync(&priv->statistics_periodic);
5097 }
5098
5099 static struct attribute *iwl4965_sysfs_entries[] = {
5100         &dev_attr_channels.attr,
5101         &dev_attr_flags.attr,
5102         &dev_attr_filter_flags.attr,
5103 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
5104         &dev_attr_measurement.attr,
5105 #endif
5106         &dev_attr_power_level.attr,
5107         &dev_attr_retry_rate.attr,
5108         &dev_attr_rs_window.attr,
5109         &dev_attr_statistics.attr,
5110         &dev_attr_status.attr,
5111         &dev_attr_temperature.attr,
5112         &dev_attr_tx_power.attr,
5113 #ifdef CONFIG_IWLWIFI_DEBUG
5114         &dev_attr_debug_level.attr,
5115 #endif
5116         &dev_attr_version.attr,
5117
5118         NULL
5119 };
5120
5121 static struct attribute_group iwl4965_attribute_group = {
5122         .name = NULL,           /* put in device directory */
5123         .attrs = iwl4965_sysfs_entries,
5124 };
5125
5126 static struct ieee80211_ops iwl4965_hw_ops = {
5127         .tx = iwl4965_mac_tx,
5128         .start = iwl4965_mac_start,
5129         .stop = iwl4965_mac_stop,
5130         .add_interface = iwl4965_mac_add_interface,
5131         .remove_interface = iwl4965_mac_remove_interface,
5132         .config = iwl4965_mac_config,
5133         .config_interface = iwl4965_mac_config_interface,
5134         .configure_filter = iwl4965_configure_filter,
5135         .set_key = iwl4965_mac_set_key,
5136         .update_tkip_key = iwl4965_mac_update_tkip_key,
5137         .get_stats = iwl4965_mac_get_stats,
5138         .get_tx_stats = iwl4965_mac_get_tx_stats,
5139         .conf_tx = iwl4965_mac_conf_tx,
5140         .get_tsf = iwl4965_mac_get_tsf,
5141         .reset_tsf = iwl4965_mac_reset_tsf,
5142         .beacon_update = iwl4965_mac_beacon_update,
5143         .bss_info_changed = iwl4965_bss_info_changed,
5144         .ampdu_action = iwl4965_mac_ampdu_action,
5145         .hw_scan = iwl4965_mac_hw_scan
5146 };
5147
5148 static int iwl4965_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
5149 {
5150         int err = 0;
5151         struct iwl_priv *priv;
5152         struct ieee80211_hw *hw;
5153         struct iwl_cfg *cfg = (struct iwl_cfg *)(ent->driver_data);
5154         unsigned long flags;
5155         DECLARE_MAC_BUF(mac);
5156
5157         /************************
5158          * 1. Allocating HW data
5159          ************************/
5160
5161         /* Disabling hardware scan means that mac80211 will perform scans
5162          * "the hard way", rather than using device's scan. */
5163         if (cfg->mod_params->disable_hw_scan) {
5164                 if (cfg->mod_params->debug & IWL_DL_INFO)
5165                         dev_printk(KERN_DEBUG, &(pdev->dev),
5166                                    "Disabling hw_scan\n");
5167                 iwl4965_hw_ops.hw_scan = NULL;
5168         }
5169
5170         hw = iwl_alloc_all(cfg, &iwl4965_hw_ops);
5171         if (!hw) {
5172                 err = -ENOMEM;
5173                 goto out;
5174         }
5175         priv = hw->priv;
5176         /* At this point both hw and priv are allocated. */
5177
5178         SET_IEEE80211_DEV(hw, &pdev->dev);
5179
5180         IWL_DEBUG_INFO("*** LOAD DRIVER ***\n");
5181         priv->cfg = cfg;
5182         priv->pci_dev = pdev;
5183
5184 #ifdef CONFIG_IWLWIFI_DEBUG
5185         priv->debug_level = priv->cfg->mod_params->debug;
5186         atomic_set(&priv->restrict_refcnt, 0);
5187 #endif
5188
5189         /**************************
5190          * 2. Initializing PCI bus
5191          **************************/
5192         if (pci_enable_device(pdev)) {
5193                 err = -ENODEV;
5194                 goto out_ieee80211_free_hw;
5195         }
5196
5197         pci_set_master(pdev);
5198
5199         err = pci_set_dma_mask(pdev, DMA_64BIT_MASK);
5200         if (!err)
5201                 err = pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK);
5202         if (err) {
5203                 err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
5204                 if (!err)
5205                         err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
5206                 /* both attempts failed: */
5207                 if (err) {
5208                         printk(KERN_WARNING "%s: No suitable DMA available.\n",
5209                                 DRV_NAME);
5210                         goto out_pci_disable_device;
5211                 }
5212         }
5213
5214         err = pci_request_regions(pdev, DRV_NAME);
5215         if (err)
5216                 goto out_pci_disable_device;
5217
5218         pci_set_drvdata(pdev, priv);
5219
5220         /* We disable the RETRY_TIMEOUT register (0x41) to keep
5221          * PCI Tx retries from interfering with C3 CPU state */
5222         pci_write_config_byte(pdev, 0x41, 0x00);
5223
5224         /***********************
5225          * 3. Read REV register
5226          ***********************/
5227         priv->hw_base = pci_iomap(pdev, 0, 0);
5228         if (!priv->hw_base) {
5229                 err = -ENODEV;
5230                 goto out_pci_release_regions;
5231         }
5232
5233         IWL_DEBUG_INFO("pci_resource_len = 0x%08llx\n",
5234                 (unsigned long long) pci_resource_len(pdev, 0));
5235         IWL_DEBUG_INFO("pci_resource_base = %p\n", priv->hw_base);
5236
5237         iwl_hw_detect(priv);
5238         printk(KERN_INFO DRV_NAME
5239                 ": Detected Intel Wireless WiFi Link %s REV=0x%X\n",
5240                 priv->cfg->name, priv->hw_rev);
5241
5242         /* amp init */
5243         err = priv->cfg->ops->lib->apm_ops.init(priv);
5244         if (err < 0) {
5245                 IWL_DEBUG_INFO("Failed to init APMG\n");
5246                 goto out_iounmap;
5247         }
5248         /*****************
5249          * 4. Read EEPROM
5250          *****************/
5251         /* Read the EEPROM */
5252         err = iwl_eeprom_init(priv);
5253         if (err) {
5254                 IWL_ERROR("Unable to init EEPROM\n");
5255                 goto out_iounmap;
5256         }
5257         err = iwl_eeprom_check_version(priv);
5258         if (err)
5259                 goto out_iounmap;
5260
5261         /* extract MAC Address */
5262         iwl_eeprom_get_mac(priv, priv->mac_addr);
5263         IWL_DEBUG_INFO("MAC address: %s\n", print_mac(mac, priv->mac_addr));
5264         SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
5265
5266         /************************
5267          * 5. Setup HW constants
5268          ************************/
5269         /* Device-specific setup */
5270         if (priv->cfg->ops->lib->set_hw_params(priv)) {
5271                 IWL_ERROR("failed to set hw parameters\n");
5272                 goto out_free_eeprom;
5273         }
5274
5275         /*******************
5276          * 6. Setup priv
5277          *******************/
5278
5279         err = iwl_init_drv(priv);
5280         if (err)
5281                 goto out_free_eeprom;
5282         /* At this point both hw and priv are initialized. */
5283
5284         /**********************************
5285          * 7. Initialize module parameters
5286          **********************************/
5287
5288         /* Disable radio (SW RF KILL) via parameter when loading driver */
5289         if (priv->cfg->mod_params->disable) {
5290                 set_bit(STATUS_RF_KILL_SW, &priv->status);
5291                 IWL_DEBUG_INFO("Radio disabled.\n");
5292         }
5293
5294         /********************
5295          * 8. Setup services
5296          ********************/
5297         spin_lock_irqsave(&priv->lock, flags);
5298         iwl4965_disable_interrupts(priv);
5299         spin_unlock_irqrestore(&priv->lock, flags);
5300
5301         err = sysfs_create_group(&pdev->dev.kobj, &iwl4965_attribute_group);
5302         if (err) {
5303                 IWL_ERROR("failed to create sysfs device attributes\n");
5304                 goto out_uninit_drv;
5305         }
5306
5307
5308         iwl_setup_deferred_work(priv);
5309         iwl4965_setup_rx_handlers(priv);
5310
5311         /********************
5312          * 9. Conclude
5313          ********************/
5314         pci_save_state(pdev);
5315         pci_disable_device(pdev);
5316
5317         /**********************************
5318          * 10. Setup and register mac80211
5319          **********************************/
5320
5321         err = iwl_setup_mac(priv);
5322         if (err)
5323                 goto out_remove_sysfs;
5324
5325         err = iwl_dbgfs_register(priv, DRV_NAME);
5326         if (err)
5327                 IWL_ERROR("failed to create debugfs files\n");
5328
5329         /* notify iwlcore to init */
5330         iwlcore_low_level_notify(priv, IWLCORE_INIT_EVT);
5331         return 0;
5332
5333  out_remove_sysfs:
5334         sysfs_remove_group(&pdev->dev.kobj, &iwl4965_attribute_group);
5335  out_uninit_drv:
5336         iwl_uninit_drv(priv);
5337  out_free_eeprom:
5338         iwl_eeprom_free(priv);
5339  out_iounmap:
5340         pci_iounmap(pdev, priv->hw_base);
5341  out_pci_release_regions:
5342         pci_release_regions(pdev);
5343         pci_set_drvdata(pdev, NULL);
5344  out_pci_disable_device:
5345         pci_disable_device(pdev);
5346  out_ieee80211_free_hw:
5347         ieee80211_free_hw(priv->hw);
5348  out:
5349         return err;
5350 }
5351
5352 static void __devexit iwl4965_pci_remove(struct pci_dev *pdev)
5353 {
5354         struct iwl_priv *priv = pci_get_drvdata(pdev);
5355         struct list_head *p, *q;
5356         int i;
5357         unsigned long flags;
5358
5359         if (!priv)
5360                 return;
5361
5362         IWL_DEBUG_INFO("*** UNLOAD DRIVER ***\n");
5363
5364         iwl_dbgfs_unregister(priv);
5365         sysfs_remove_group(&pdev->dev.kobj, &iwl4965_attribute_group);
5366
5367         if (priv->mac80211_registered) {
5368                 ieee80211_unregister_hw(priv->hw);
5369                 priv->mac80211_registered = 0;
5370         }
5371
5372         set_bit(STATUS_EXIT_PENDING, &priv->status);
5373
5374         iwl4965_down(priv);
5375
5376         /* make sure we flush any pending irq or
5377          * tasklet for the driver
5378          */
5379         spin_lock_irqsave(&priv->lock, flags);
5380         iwl4965_disable_interrupts(priv);
5381         spin_unlock_irqrestore(&priv->lock, flags);
5382
5383         iwl_synchronize_irq(priv);
5384
5385         /* Free MAC hash list for ADHOC */
5386         for (i = 0; i < IWL_IBSS_MAC_HASH_SIZE; i++) {
5387                 list_for_each_safe(p, q, &priv->ibss_mac_hash[i]) {
5388                         list_del(p);
5389                         kfree(list_entry(p, struct iwl4965_ibss_seq, list));
5390                 }
5391         }
5392
5393         iwlcore_low_level_notify(priv, IWLCORE_REMOVE_EVT);
5394
5395         iwl4965_dealloc_ucode_pci(priv);
5396
5397         if (priv->rxq.bd)
5398                 iwl_rx_queue_free(priv, &priv->rxq);
5399         iwl_hw_txq_ctx_free(priv);
5400
5401         iwlcore_clear_stations_table(priv);
5402         iwl_eeprom_free(priv);
5403
5404
5405         /*netif_stop_queue(dev); */
5406         flush_workqueue(priv->workqueue);
5407
5408         /* ieee80211_unregister_hw calls iwl4965_mac_stop, which flushes
5409          * priv->workqueue... so we can't take down the workqueue
5410          * until now... */
5411         destroy_workqueue(priv->workqueue);
5412         priv->workqueue = NULL;
5413
5414         pci_iounmap(pdev, priv->hw_base);
5415         pci_release_regions(pdev);
5416         pci_disable_device(pdev);
5417         pci_set_drvdata(pdev, NULL);
5418
5419         iwl_uninit_drv(priv);
5420
5421         if (priv->ibss_beacon)
5422                 dev_kfree_skb(priv->ibss_beacon);
5423
5424         ieee80211_free_hw(priv->hw);
5425 }
5426
5427 #ifdef CONFIG_PM
5428
5429 static int iwl4965_pci_suspend(struct pci_dev *pdev, pm_message_t state)
5430 {
5431         struct iwl_priv *priv = pci_get_drvdata(pdev);
5432
5433         if (priv->is_open) {
5434                 set_bit(STATUS_IN_SUSPEND, &priv->status);
5435                 iwl4965_mac_stop(priv->hw);
5436                 priv->is_open = 1;
5437         }
5438
5439         pci_set_power_state(pdev, PCI_D3hot);
5440
5441         return 0;
5442 }
5443
5444 static int iwl4965_pci_resume(struct pci_dev *pdev)
5445 {
5446         struct iwl_priv *priv = pci_get_drvdata(pdev);
5447
5448         pci_set_power_state(pdev, PCI_D0);
5449
5450         if (priv->is_open)
5451                 iwl4965_mac_start(priv->hw);
5452
5453         clear_bit(STATUS_IN_SUSPEND, &priv->status);
5454         return 0;
5455 }
5456
5457 #endif /* CONFIG_PM */
5458
5459 /*****************************************************************************
5460  *
5461  * driver and module entry point
5462  *
5463  *****************************************************************************/
5464
5465 /* Hardware specific file defines the PCI IDs table for that hardware module */
5466 static struct pci_device_id iwl_hw_card_ids[] = {
5467         {IWL_PCI_DEVICE(0x4229, PCI_ANY_ID, iwl4965_agn_cfg)},
5468         {IWL_PCI_DEVICE(0x4230, PCI_ANY_ID, iwl4965_agn_cfg)},
5469 #ifdef CONFIG_IWL5000
5470         {IWL_PCI_DEVICE(0x4235, PCI_ANY_ID, iwl5300_agn_cfg)},
5471         {IWL_PCI_DEVICE(0x4232, PCI_ANY_ID, iwl5100_agn_cfg)},
5472         {IWL_PCI_DEVICE(0x423A, PCI_ANY_ID, iwl5350_agn_cfg)},
5473 #endif /* CONFIG_IWL5000 */
5474         {0}
5475 };
5476 MODULE_DEVICE_TABLE(pci, iwl_hw_card_ids);
5477
5478 static struct pci_driver iwl_driver = {
5479         .name = DRV_NAME,
5480         .id_table = iwl_hw_card_ids,
5481         .probe = iwl4965_pci_probe,
5482         .remove = __devexit_p(iwl4965_pci_remove),
5483 #ifdef CONFIG_PM
5484         .suspend = iwl4965_pci_suspend,
5485         .resume = iwl4965_pci_resume,
5486 #endif
5487 };
5488
5489 static int __init iwl4965_init(void)
5490 {
5491
5492         int ret;
5493         printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
5494         printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
5495
5496         ret = iwl4965_rate_control_register();
5497         if (ret) {
5498                 IWL_ERROR("Unable to register rate control algorithm: %d\n", ret);
5499                 return ret;
5500         }
5501
5502         ret = pci_register_driver(&iwl_driver);
5503         if (ret) {
5504                 IWL_ERROR("Unable to initialize PCI module\n");
5505                 goto error_register;
5506         }
5507
5508         return ret;
5509
5510 error_register:
5511         iwl4965_rate_control_unregister();
5512         return ret;
5513 }
5514
5515 static void __exit iwl4965_exit(void)
5516 {
5517         pci_unregister_driver(&iwl_driver);
5518         iwl4965_rate_control_unregister();
5519 }
5520
5521 module_exit(iwl4965_exit);
5522 module_init(iwl4965_init);