err.no Git - linux-2.6/blob - drivers/net/wireless/iwlwifi/iwl-3945.c

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2008 Intel Corporation. All rights reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms of version 2 of the GNU General Public License as
   7  * published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  12  * more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along with
  15  * this program; if not, write to the Free Software Foundation, Inc.,
  16  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
  17  *
  18  * The full GNU General Public License is included in this distribution in the
  19  * file called LICENSE.
  20  *
  21  * Contact Information:
  22  * James P. Ketrenos <ipw2100-admin@linux.intel.com>
  23  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  24  *
  25  *****************************************************************************/
  26
  27 #include <linux/kernel.h>
  28 #include <linux/module.h>
  29 #include <linux/version.h>
  30 #include <linux/init.h>
  31 #include <linux/pci.h>
  32 #include <linux/dma-mapping.h>
  33 #include <linux/delay.h>
  34 #include <linux/skbuff.h>
  35 #include <linux/netdevice.h>
  36 #include <linux/wireless.h>
  37 #include <linux/firmware.h>
  38 #include <linux/etherdevice.h>
  39 #include <asm/unaligned.h>
  40 #include <net/mac80211.h>
  41
  42 #include "iwl-3945-core.h"
  43 #include "iwl-3945.h"
  44 #include "iwl-helpers.h"
  45 #include "iwl-3945-rs.h"
  46
  47 #define IWL_DECLARE_RATE_INFO(r, ip, in, rp, rn, pp, np)    \
  48         [IWL_RATE_##r##M_INDEX] = { IWL_RATE_##r##M_PLCP,   \
  49                                     IWL_RATE_##r##M_IEEE,   \
  50                                     IWL_RATE_##ip##M_INDEX, \
  51                                     IWL_RATE_##in##M_INDEX, \
  52                                     IWL_RATE_##rp##M_INDEX, \
  53                                     IWL_RATE_##rn##M_INDEX, \
  54                                     IWL_RATE_##pp##M_INDEX, \
  55                                     IWL_RATE_##np##M_INDEX, \
  56                                     IWL_RATE_##r##M_INDEX_TABLE, \
  57                                     IWL_RATE_##ip##M_INDEX_TABLE }
  58
  59 /*
  60  * Parameter order:
  61  *   rate, prev rate, next rate, prev tgg rate, next tgg rate
  62  *
  63  * If there isn't a valid next or previous rate then INV is used which
  64  * maps to IWL_RATE_INVALID
  65  *
  66  */
  67 const struct iwl3945_rate_info iwl3945_rates[IWL_RATE_COUNT] = {
  68         IWL_DECLARE_RATE_INFO(1, INV, 2, INV, 2, INV, 2),    /*  1mbps */
  69         IWL_DECLARE_RATE_INFO(2, 1, 5, 1, 5, 1, 5),          /*  2mbps */
  70         IWL_DECLARE_RATE_INFO(5, 2, 6, 2, 11, 2, 11),        /*5.5mbps */
  71         IWL_DECLARE_RATE_INFO(11, 9, 12, 5, 12, 5, 18),      /* 11mbps */
  72         IWL_DECLARE_RATE_INFO(6, 5, 9, 5, 11, 5, 11),        /*  6mbps */
  73         IWL_DECLARE_RATE_INFO(9, 6, 11, 5, 11, 5, 11),       /*  9mbps */
  74         IWL_DECLARE_RATE_INFO(12, 11, 18, 11, 18, 11, 18),   /* 12mbps */
  75         IWL_DECLARE_RATE_INFO(18, 12, 24, 12, 24, 11, 24),   /* 18mbps */
  76         IWL_DECLARE_RATE_INFO(24, 18, 36, 18, 36, 18, 36),   /* 24mbps */
  77         IWL_DECLARE_RATE_INFO(36, 24, 48, 24, 48, 24, 48),   /* 36mbps */
  78         IWL_DECLARE_RATE_INFO(48, 36, 54, 36, 54, 36, 54),   /* 48mbps */
  79         IWL_DECLARE_RATE_INFO(54, 48, INV, 48, INV, 48, INV),/* 54mbps */
  80 };
  81
  82 /* 1 = enable the iwl3945_disable_events() function */
  83 #define IWL_EVT_DISABLE (0)
  84 #define IWL_EVT_DISABLE_SIZE (1532/32)
  85
  86 /**
  87  * iwl3945_disable_events - Disable selected events in uCode event log
  88  *
  89  * Disable an event by writing "1"s into "disable"
  90  *   bitmap in SRAM.  Bit position corresponds to Event # (id/type).
  91  *   Default values of 0 enable uCode events to be logged.
  92  * Use for only special debugging.  This function is just a placeholder as-is,
  93  *   you'll need to provide the special bits! ...
  94  *   ... and set IWL_EVT_DISABLE to 1. */
  95 void iwl3945_disable_events(struct iwl3945_priv *priv)
  96 {
  97         int ret;
  98         int i;
  99         u32 base;               /* SRAM address of event log header */
 100         u32 disable_ptr;        /* SRAM address of event-disable bitmap array */
 101         u32 array_size;         /* # of u32 entries in array */
 102         u32 evt_disable[IWL_EVT_DISABLE_SIZE] = {
 103                 0x00000000,     /*   31 -    0  Event id numbers */
 104                 0x00000000,     /*   63 -   32 */
 105                 0x00000000,     /*   95 -   64 */
 106                 0x00000000,     /*  127 -   96 */
 107                 0x00000000,     /*  159 -  128 */
 108                 0x00000000,     /*  191 -  160 */
 109                 0x00000000,     /*  223 -  192 */
 110                 0x00000000,     /*  255 -  224 */
 111                 0x00000000,     /*  287 -  256 */
 112                 0x00000000,     /*  319 -  288 */
 113                 0x00000000,     /*  351 -  320 */
 114                 0x00000000,     /*  383 -  352 */
 115                 0x00000000,     /*  415 -  384 */
 116                 0x00000000,     /*  447 -  416 */
 117                 0x00000000,     /*  479 -  448 */
 118                 0x00000000,     /*  511 -  480 */
 119                 0x00000000,     /*  543 -  512 */
 120                 0x00000000,     /*  575 -  544 */
 121                 0x00000000,     /*  607 -  576 */
 122                 0x00000000,     /*  639 -  608 */
 123                 0x00000000,     /*  671 -  640 */
 124                 0x00000000,     /*  703 -  672 */
 125                 0x00000000,     /*  735 -  704 */
 126                 0x00000000,     /*  767 -  736 */
 127                 0x00000000,     /*  799 -  768 */
 128                 0x00000000,     /*  831 -  800 */
 129                 0x00000000,     /*  863 -  832 */
 130                 0x00000000,     /*  895 -  864 */
 131                 0x00000000,     /*  927 -  896 */
 132                 0x00000000,     /*  959 -  928 */
 133                 0x00000000,     /*  991 -  960 */
 134                 0x00000000,     /* 1023 -  992 */
 135                 0x00000000,     /* 1055 - 1024 */
 136                 0x00000000,     /* 1087 - 1056 */
 137                 0x00000000,     /* 1119 - 1088 */
 138                 0x00000000,     /* 1151 - 1120 */
 139                 0x00000000,     /* 1183 - 1152 */
 140                 0x00000000,     /* 1215 - 1184 */
 141                 0x00000000,     /* 1247 - 1216 */
 142                 0x00000000,     /* 1279 - 1248 */
 143                 0x00000000,     /* 1311 - 1280 */
 144                 0x00000000,     /* 1343 - 1312 */
 145                 0x00000000,     /* 1375 - 1344 */
 146                 0x00000000,     /* 1407 - 1376 */
 147                 0x00000000,     /* 1439 - 1408 */
 148                 0x00000000,     /* 1471 - 1440 */
 149                 0x00000000,     /* 1503 - 1472 */
 150         };
 151
 152         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
 153         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
 154                 IWL_ERROR("Invalid event log pointer 0x%08X\n", base);
 155                 return;
 156         }
 157
 158         ret = iwl3945_grab_nic_access(priv);
 159         if (ret) {
 160                 IWL_WARNING("Can not read from adapter at this time.\n");
 161                 return;
 162         }
 163
 164         disable_ptr = iwl3945_read_targ_mem(priv, base + (4 * sizeof(u32)));
 165         array_size = iwl3945_read_targ_mem(priv, base + (5 * sizeof(u32)));
 166         iwl3945_release_nic_access(priv);
 167
 168         if (IWL_EVT_DISABLE && (array_size == IWL_EVT_DISABLE_SIZE)) {
 169                 IWL_DEBUG_INFO("Disabling selected uCode log events at 0x%x\n",
 170                                disable_ptr);
 171                 ret = iwl3945_grab_nic_access(priv);
 172                 for (i = 0; i < IWL_EVT_DISABLE_SIZE; i++)
 173                         iwl3945_write_targ_mem(priv,
 174                                            disable_ptr + (i * sizeof(u32)),
 175                                            evt_disable[i]);
 176
 177                 iwl3945_release_nic_access(priv);
 178         } else {
 179                 IWL_DEBUG_INFO("Selected uCode log events may be disabled\n");
 180                 IWL_DEBUG_INFO("  by writing \"1\"s into disable bitmap\n");
 181                 IWL_DEBUG_INFO("  in SRAM at 0x%x, size %d u32s\n",
 182                                disable_ptr, array_size);
 183         }
 184
 185 }
 186
 187 static int iwl3945_hwrate_to_plcp_idx(u8 plcp)
 188 {
 189         int idx;
 190
 191         for (idx = 0; idx < IWL_RATE_COUNT; idx++)
 192                 if (iwl3945_rates[idx].plcp == plcp)
 193                         return idx;
 194         return -1;
 195 }
 196
 197 /**
 198  * iwl3945_get_antenna_flags - Get antenna flags for RXON command
 199  * @priv: eeprom and antenna fields are used to determine antenna flags
 200  *
 201  * priv->eeprom  is used to determine if antenna AUX/MAIN are reversed
 202  * priv->antenna specifies the antenna diversity mode:
 203  *
 204  * IWL_ANTENNA_DIVERISTY - NIC selects best antenna by itself
 205  * IWL_ANTENNA_MAIN      - Force MAIN antenna
 206  * IWL_ANTENNA_AUX       - Force AUX antenna
 207  */
 208 __le32 iwl3945_get_antenna_flags(const struct iwl3945_priv *priv)
 209 {
 210         switch (priv->antenna) {
 211         case IWL_ANTENNA_DIVERSITY:
 212                 return 0;
 213
 214         case IWL_ANTENNA_MAIN:
 215                 if (priv->eeprom.antenna_switch_type)
 216                         return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_B_MSK;
 217                 return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_A_MSK;
 218
 219         case IWL_ANTENNA_AUX:
 220                 if (priv->eeprom.antenna_switch_type)
 221                         return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_A_MSK;
 222                 return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_B_MSK;
 223         }
 224
 225         /* bad antenna selector value */
 226         IWL_ERROR("Bad antenna selector value (0x%x)\n", priv->antenna);
 227         return 0;               /* "diversity" is default if error */
 228 }
 229
 230 #ifdef CONFIG_IWL3945_DEBUG
 231 #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
 232
 233 static const char *iwl3945_get_tx_fail_reason(u32 status)
 234 {
 235         switch (status & TX_STATUS_MSK) {
 236         case TX_STATUS_SUCCESS:
 237                 return "SUCCESS";
 238                 TX_STATUS_ENTRY(SHORT_LIMIT);
 239                 TX_STATUS_ENTRY(LONG_LIMIT);
 240                 TX_STATUS_ENTRY(FIFO_UNDERRUN);
 241                 TX_STATUS_ENTRY(MGMNT_ABORT);
 242                 TX_STATUS_ENTRY(NEXT_FRAG);
 243                 TX_STATUS_ENTRY(LIFE_EXPIRE);
 244                 TX_STATUS_ENTRY(DEST_PS);
 245                 TX_STATUS_ENTRY(ABORTED);
 246                 TX_STATUS_ENTRY(BT_RETRY);
 247                 TX_STATUS_ENTRY(STA_INVALID);
 248                 TX_STATUS_ENTRY(FRAG_DROPPED);
 249                 TX_STATUS_ENTRY(TID_DISABLE);
 250                 TX_STATUS_ENTRY(FRAME_FLUSHED);
 251                 TX_STATUS_ENTRY(INSUFFICIENT_CF_POLL);
 252                 TX_STATUS_ENTRY(TX_LOCKED);
 253                 TX_STATUS_ENTRY(NO_BEACON_ON_RADAR);
 254         }
 255
 256         return "UNKNOWN";
 257 }
 258 #else
 259 static inline const char *iwl3945_get_tx_fail_reason(u32 status)
 260 {
 261         return "";
 262 }
 263 #endif
 264
 265
 266 /**
 267  * iwl3945_tx_queue_reclaim - Reclaim Tx queue entries already Tx'd
 268  *
 269  * When FW advances 'R' index, all entries between old and new 'R' index
 270  * need to be reclaimed. As result, some free space forms. If there is
 271  * enough free space (> low mark), wake the stack that feeds us.
 272  */
 273 static void iwl3945_tx_queue_reclaim(struct iwl3945_priv *priv,
 274                                      int txq_id, int index)
 275 {
 276         struct iwl3945_tx_queue *txq = &priv->txq[txq_id];
 277         struct iwl3945_queue *q = &txq->q;
 278         struct iwl3945_tx_info *tx_info;
 279
 280         BUG_ON(txq_id == IWL_CMD_QUEUE_NUM);
 281
 282         for (index = iwl_queue_inc_wrap(index, q->n_bd); q->read_ptr != index;
 283                 q->read_ptr = iwl_queue_inc_wrap(q->read_ptr, q->n_bd)) {
 284
 285                 tx_info = &txq->txb[txq->q.read_ptr];
 286                 ieee80211_tx_status_irqsafe(priv->hw, tx_info->skb[0],
 287                                             &tx_info->status);
 288                 tx_info->skb[0] = NULL;
 289                 iwl3945_hw_txq_free_tfd(priv, txq);
 290         }
 291
 292         if (iwl3945_queue_space(q) > q->low_mark && (txq_id >= 0) &&
 293                         (txq_id != IWL_CMD_QUEUE_NUM) &&
 294                         priv->mac80211_registered)
 295                 ieee80211_wake_queue(priv->hw, txq_id);
 296 }
 297
 298 /**
 299  * iwl3945_rx_reply_tx - Handle Tx response
 300  */
 301 static void iwl3945_rx_reply_tx(struct iwl3945_priv *priv,
 302                             struct iwl3945_rx_mem_buffer *rxb)
 303 {
 304         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
 305         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
 306         int txq_id = SEQ_TO_QUEUE(sequence);
 307         int index = SEQ_TO_INDEX(sequence);
 308         struct iwl3945_tx_queue *txq = &priv->txq[txq_id];
 309         struct ieee80211_tx_status *tx_status;
 310         struct iwl3945_tx_resp *tx_resp = (void *)&pkt->u.raw[0];
 311         u32  status = le32_to_cpu(tx_resp->status);
 312         int rate_idx;
 313
 314         if ((index >= txq->q.n_bd) || (iwl3945_x2_queue_used(&txq->q, index) == 0)) {
 315                 IWL_ERROR("Read index for DMA queue txq_id (%d) index %d "
 316                           "is out of range [0-%d] %d %d\n", txq_id,
 317                           index, txq->q.n_bd, txq->q.write_ptr,
 318                           txq->q.read_ptr);
 319                 return;
 320         }
 321
 322         tx_status = &(txq->txb[txq->q.read_ptr].status);
 323
 324         tx_status->retry_count = tx_resp->failure_frame;
 325         /* tx_status->rts_retry_count = tx_resp->failure_rts; */
 326         tx_status->flags = ((status & TX_STATUS_MSK) == TX_STATUS_SUCCESS) ?
 327                                 IEEE80211_TX_STATUS_ACK : 0;
 328
 329         IWL_DEBUG_TX("Tx queue %d Status %s (0x%08x) plcp rate %d retries %d\n",
 330                         txq_id, iwl3945_get_tx_fail_reason(status), status,
 331                         tx_resp->rate, tx_resp->failure_frame);
 332
 333         rate_idx = iwl3945_hwrate_to_plcp_idx(tx_resp->rate);
 334         tx_status->control.tx_rate = &priv->ieee_rates[rate_idx];
 335         IWL_DEBUG_TX_REPLY("Tx queue reclaim %d\n", index);
 336         iwl3945_tx_queue_reclaim(priv, txq_id, index);
 337
 338         if (iwl_check_bits(status, TX_ABORT_REQUIRED_MSK))
 339                 IWL_ERROR("TODO:  Implement Tx ABORT REQUIRED!!!\n");
 340 }
 341
 342
 343
 344 /*****************************************************************************
 345  *
 346  * Intel PRO/Wireless 3945ABG/BG Network Connection
 347  *
 348  *  RX handler implementations
 349  *
 350  *****************************************************************************/
 351
 352 void iwl3945_hw_rx_statistics(struct iwl3945_priv *priv, struct iwl3945_rx_mem_buffer *rxb)
 353 {
 354         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
 355         IWL_DEBUG_RX("Statistics notification received (%d vs %d).\n",
 356                      (int)sizeof(struct iwl3945_notif_statistics),
 357                      le32_to_cpu(pkt->len));
 358
 359         memcpy(&priv->statistics, pkt->u.raw, sizeof(priv->statistics));
 360
 361         iwl3945_led_background(priv);
 362
 363         priv->last_statistics_time = jiffies;
 364 }
 365
 366 /******************************************************************************
 367  *
 368  * Misc. internal state and helper functions
 369  *
 370  ******************************************************************************/
 371 #ifdef CONFIG_IWL3945_DEBUG
 372
 373 /**
 374  * iwl3945_report_frame - dump frame to syslog during debug sessions
 375  *
 376  * You may hack this function to show different aspects of received frames,
 377  * including selective frame dumps.
 378  * group100 parameter selects whether to show 1 out of 100 good frames.
 379  */
 380 static void iwl3945_dbg_report_frame(struct iwl3945_priv *priv,
 381                       struct iwl3945_rx_packet *pkt,
 382                       struct ieee80211_hdr *header, int group100)
 383 {
 384         u32 to_us;
 385         u32 print_summary = 0;
 386         u32 print_dump = 0;     /* set to 1 to dump all frames' contents */
 387         u32 hundred = 0;
 388         u32 dataframe = 0;
 389         u16 fc;
 390         u16 seq_ctl;
 391         u16 channel;
 392         u16 phy_flags;
 393         u16 length;
 394         u16 status;
 395         u16 bcn_tmr;
 396         u32 tsf_low;
 397         u64 tsf;
 398         u8 rssi;
 399         u8 agc;
 400         u16 sig_avg;
 401         u16 noise_diff;
 402         struct iwl3945_rx_frame_stats *rx_stats = IWL_RX_STATS(pkt);
 403         struct iwl3945_rx_frame_hdr *rx_hdr = IWL_RX_HDR(pkt);
 404         struct iwl3945_rx_frame_end *rx_end = IWL_RX_END(pkt);
 405         u8 *data = IWL_RX_DATA(pkt);
 406
 407         /* MAC header */
 408         fc = le16_to_cpu(header->frame_control);
 409         seq_ctl = le16_to_cpu(header->seq_ctrl);
 410
 411         /* metadata */
 412         channel = le16_to_cpu(rx_hdr->channel);
 413         phy_flags = le16_to_cpu(rx_hdr->phy_flags);
 414         length = le16_to_cpu(rx_hdr->len);
 415
 416         /* end-of-frame status and timestamp */
 417         status = le32_to_cpu(rx_end->status);
 418         bcn_tmr = le32_to_cpu(rx_end->beacon_timestamp);
 419         tsf_low = le64_to_cpu(rx_end->timestamp) & 0x0ffffffff;
 420         tsf = le64_to_cpu(rx_end->timestamp);
 421
 422         /* signal statistics */
 423         rssi = rx_stats->rssi;
 424         agc = rx_stats->agc;
 425         sig_avg = le16_to_cpu(rx_stats->sig_avg);
 426         noise_diff = le16_to_cpu(rx_stats->noise_diff);
 427
 428         to_us = !compare_ether_addr(header->addr1, priv->mac_addr);
 429
 430         /* if data frame is to us and all is good,
 431          *   (optionally) print summary for only 1 out of every 100 */
 432         if (to_us && (fc & ~IEEE80211_FCTL_PROTECTED) ==
 433             (IEEE80211_FCTL_FROMDS | IEEE80211_FTYPE_DATA)) {
 434                 dataframe = 1;
 435                 if (!group100)
 436                         print_summary = 1;      /* print each frame */
 437                 else if (priv->framecnt_to_us < 100) {
 438                         priv->framecnt_to_us++;
 439                         print_summary = 0;
 440                 } else {
 441                         priv->framecnt_to_us = 0;
 442                         print_summary = 1;
 443                         hundred = 1;
 444                 }
 445         } else {
 446                 /* print summary for all other frames */
 447                 print_summary = 1;
 448         }
 449
 450         if (print_summary) {
 451                 char *title;
 452                 u32 rate;
 453
 454                 if (hundred)
 455                         title = "100Frames";
 456                 else if (fc & IEEE80211_FCTL_RETRY)
 457                         title = "Retry";
 458                 else if (ieee80211_is_assoc_response(fc))
 459                         title = "AscRsp";
 460                 else if (ieee80211_is_reassoc_response(fc))
 461                         title = "RasRsp";
 462                 else if (ieee80211_is_probe_response(fc)) {
 463                         title = "PrbRsp";
 464                         print_dump = 1; /* dump frame contents */
 465                 } else if (ieee80211_is_beacon(fc)) {
 466                         title = "Beacon";
 467                         print_dump = 1; /* dump frame contents */
 468                 } else if (ieee80211_is_atim(fc))
 469                         title = "ATIM";
 470                 else if (ieee80211_is_auth(fc))
 471                         title = "Auth";
 472                 else if (ieee80211_is_deauth(fc))
 473                         title = "DeAuth";
 474                 else if (ieee80211_is_disassoc(fc))
 475                         title = "DisAssoc";
 476                 else
 477                         title = "Frame";
 478
 479                 rate = iwl3945_hwrate_to_plcp_idx(rx_hdr->rate);
 480                 if (rate == -1)
 481                         rate = 0;
 482                 else
 483                         rate = iwl3945_rates[rate].ieee / 2;
 484
 485                 /* print frame summary.
 486                  * MAC addresses show just the last byte (for brevity),
 487                  *    but you can hack it to show more, if you'd like to. */
 488                 if (dataframe)
 489                         IWL_DEBUG_RX("%s: mhd=0x%04x, dst=0x%02x, "
 490                                      "len=%u, rssi=%d, chnl=%d, rate=%u, \n",
 491                                      title, fc, header->addr1[5],
 492                                      length, rssi, channel, rate);
 493                 else {
 494                         /* src/dst addresses assume managed mode */
 495                         IWL_DEBUG_RX("%s: 0x%04x, dst=0x%02x, "
 496                                      "src=0x%02x, rssi=%u, tim=%lu usec, "
 497                                      "phy=0x%02x, chnl=%d\n",
 498                                      title, fc, header->addr1[5],
 499                                      header->addr3[5], rssi,
 500                                      tsf_low - priv->scan_start_tsf,
 501                                      phy_flags, channel);
 502                 }
 503         }
 504         if (print_dump)
 505                 iwl3945_print_hex_dump(IWL_DL_RX, data, length);
 506 }
 507 #else
 508 static inline void iwl3945_dbg_report_frame(struct iwl3945_priv *priv,
 509                       struct iwl3945_rx_packet *pkt,
 510                       struct ieee80211_hdr *header, int group100)
 511 {
 512 }
 513 #endif
 514
 515
 516 static void iwl3945_add_radiotap(struct iwl3945_priv *priv,
 517                                  struct sk_buff *skb,
 518                                  struct iwl3945_rx_frame_hdr *rx_hdr,
 519                                  struct ieee80211_rx_status *stats)
 520 {
 521         /* First cache any information we need before we overwrite
 522          * the information provided in the skb from the hardware */
 523         s8 signal = stats->ssi;
 524         s8 noise = 0;
 525         int rate = stats->rate_idx;
 526         u64 tsf = stats->mactime;
 527         __le16 phy_flags_hw = rx_hdr->phy_flags, antenna;
 528
 529         struct iwl3945_rt_rx_hdr {
 530                 struct ieee80211_radiotap_header rt_hdr;
 531                 __le64 rt_tsf;          /* TSF */
 532                 u8 rt_flags;            /* radiotap packet flags */
 533                 u8 rt_rate;             /* rate in 500kb/s */
 534                 __le16 rt_channelMHz;   /* channel in MHz */
 535                 __le16 rt_chbitmask;    /* channel bitfield */
 536                 s8 rt_dbmsignal;        /* signal in dBm, kluged to signed */
 537                 s8 rt_dbmnoise;
 538                 u8 rt_antenna;          /* antenna number */
 539         } __attribute__ ((packed)) *iwl3945_rt;
 540
 541         if (skb_headroom(skb) < sizeof(*iwl3945_rt)) {
 542                 if (net_ratelimit())
 543                         printk(KERN_ERR "not enough headroom [%d] for "
 544                                "radiotap head [%zd]\n",
 545                                skb_headroom(skb), sizeof(*iwl3945_rt));
 546                 return;
 547         }
 548
 549         /* put radiotap header in front of 802.11 header and data */
 550         iwl3945_rt = (void *)skb_push(skb, sizeof(*iwl3945_rt));
 551
 552         /* initialise radiotap header */
 553         iwl3945_rt->rt_hdr.it_version = PKTHDR_RADIOTAP_VERSION;
 554         iwl3945_rt->rt_hdr.it_pad = 0;
 555
 556         /* total header + data */
 557         put_unaligned(cpu_to_le16(sizeof(*iwl3945_rt)),
 558                       &iwl3945_rt->rt_hdr.it_len);
 559
 560         /* Indicate all the fields we add to the radiotap header */
 561         put_unaligned(cpu_to_le32((1 << IEEE80211_RADIOTAP_TSFT) |
 562                                   (1 << IEEE80211_RADIOTAP_FLAGS) |
 563                                   (1 << IEEE80211_RADIOTAP_RATE) |
 564                                   (1 << IEEE80211_RADIOTAP_CHANNEL) |
 565                                   (1 << IEEE80211_RADIOTAP_DBM_ANTSIGNAL) |
 566                                   (1 << IEEE80211_RADIOTAP_DBM_ANTNOISE) |
 567                                   (1 << IEEE80211_RADIOTAP_ANTENNA)),
 568                       &iwl3945_rt->rt_hdr.it_present);
 569
 570         /* Zero the flags, we'll add to them as we go */
 571         iwl3945_rt->rt_flags = 0;
 572
 573         put_unaligned(cpu_to_le64(tsf), &iwl3945_rt->rt_tsf);
 574
 575         iwl3945_rt->rt_dbmsignal = signal;
 576         iwl3945_rt->rt_dbmnoise = noise;
 577
 578         /* Convert the channel frequency and set the flags */
 579         put_unaligned(cpu_to_le16(stats->freq), &iwl3945_rt->rt_channelMHz);
 580         if (!(phy_flags_hw & RX_RES_PHY_FLAGS_BAND_24_MSK))
 581                 put_unaligned(cpu_to_le16(IEEE80211_CHAN_OFDM |
 582                                           IEEE80211_CHAN_5GHZ),
 583                               &iwl3945_rt->rt_chbitmask);
 584         else if (phy_flags_hw & RX_RES_PHY_FLAGS_MOD_CCK_MSK)
 585                 put_unaligned(cpu_to_le16(IEEE80211_CHAN_CCK |
 586                                           IEEE80211_CHAN_2GHZ),
 587                               &iwl3945_rt->rt_chbitmask);
 588         else    /* 802.11g */
 589                 put_unaligned(cpu_to_le16(IEEE80211_CHAN_OFDM |
 590                                           IEEE80211_CHAN_2GHZ),
 591                               &iwl3945_rt->rt_chbitmask);
 592
 593         if (rate == -1)
 594                 iwl3945_rt->rt_rate = 0;
 595         else
 596                 iwl3945_rt->rt_rate = iwl3945_rates[rate].ieee;
 597
 598         /* antenna number */
 599         antenna = phy_flags_hw & RX_RES_PHY_FLAGS_ANTENNA_MSK;
 600         iwl3945_rt->rt_antenna = le16_to_cpu(antenna) >> 4;
 601
 602         /* set the preamble flag if we have it */
 603         if (phy_flags_hw & RX_RES_PHY_FLAGS_SHORT_PREAMBLE_MSK)
 604                 iwl3945_rt->rt_flags |= IEEE80211_RADIOTAP_F_SHORTPRE;
 605
 606         stats->flag |= RX_FLAG_RADIOTAP;
 607 }
 608
 609 static void iwl3945_handle_data_packet(struct iwl3945_priv *priv, int is_data,
 610                                    struct iwl3945_rx_mem_buffer *rxb,
 611                                    struct ieee80211_rx_status *stats)
 612 {
 613         struct ieee80211_hdr *hdr;
 614         struct iwl3945_rx_packet *pkt = (struct iwl3945_rx_packet *)rxb->skb->data;
 615         struct iwl3945_rx_frame_hdr *rx_hdr = IWL_RX_HDR(pkt);
 616         struct iwl3945_rx_frame_end *rx_end = IWL_RX_END(pkt);
 617         short len = le16_to_cpu(rx_hdr->len);
 618
 619         /* We received data from the HW, so stop the watchdog */
 620         if (unlikely((len + IWL_RX_FRAME_SIZE) > skb_tailroom(rxb->skb))) {
 621                 IWL_DEBUG_DROP("Corruption detected!\n");
 622                 return;
 623         }
 624
 625         /* We only process data packets if the interface is open */
 626         if (unlikely(!priv->is_open)) {
 627                 IWL_DEBUG_DROP_LIMIT
 628                     ("Dropping packet while interface is not open.\n");
 629                 return;
 630         }
 631
 632         skb_reserve(rxb->skb, (void *)rx_hdr->payload - (void *)pkt);
 633         /* Set the size of the skb to the size of the frame */
 634         skb_put(rxb->skb, le16_to_cpu(rx_hdr->len));
 635
 636         hdr = (void *)rxb->skb->data;
 637
 638         if (iwl3945_param_hwcrypto)
 639                 iwl3945_set_decrypted_flag(priv, rxb->skb,
 640                                        le32_to_cpu(rx_end->status), stats);
 641
 642         if (priv->add_radiotap)
 643                 iwl3945_add_radiotap(priv, rxb->skb, rx_hdr, stats);
 644
 645 #ifdef CONFIG_IWL3945_LEDS
 646         if (is_data)
 647                 priv->rxtxpackets += len;
 648 #endif
 649         ieee80211_rx_irqsafe(priv->hw, rxb->skb, stats);
 650         rxb->skb = NULL;
 651 }
 652
 653 #define IWL_DELAY_NEXT_SCAN_AFTER_ASSOC (HZ*6)
 654
 655 static void iwl3945_rx_reply_rx(struct iwl3945_priv *priv,
 656                                 struct iwl3945_rx_mem_buffer *rxb)
 657 {
 658         struct ieee80211_hdr *header;
 659         struct ieee80211_rx_status rx_status;
 660         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
 661         struct iwl3945_rx_frame_stats *rx_stats = IWL_RX_STATS(pkt);
 662         struct iwl3945_rx_frame_hdr *rx_hdr = IWL_RX_HDR(pkt);
 663         struct iwl3945_rx_frame_end *rx_end = IWL_RX_END(pkt);
 664         int snr;
 665         u16 rx_stats_sig_avg = le16_to_cpu(rx_stats->sig_avg);
 666         u16 rx_stats_noise_diff = le16_to_cpu(rx_stats->noise_diff);
 667         u8 network_packet;
 668
 669         rx_status.antenna = 0;
 670         rx_status.flag = 0;
 671         rx_status.mactime = le64_to_cpu(rx_end->timestamp);
 672         rx_status.freq =
 673                 ieee80211_frequency_to_channel(le16_to_cpu(rx_hdr->channel));
 674         rx_status.band = (rx_hdr->phy_flags & RX_RES_PHY_FLAGS_BAND_24_MSK) ?
 675                                 IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ;
 676
 677         rx_status.rate_idx = iwl3945_hwrate_to_plcp_idx(rx_hdr->rate);
 678         if (rx_status.band == IEEE80211_BAND_5GHZ)
 679                 rx_status.rate_idx -= IWL_FIRST_OFDM_RATE;
 680
 681         if ((unlikely(rx_stats->phy_count > 20))) {
 682                 IWL_DEBUG_DROP
 683                     ("dsp size out of range [0,20]: "
 684                      "%d/n", rx_stats->phy_count);
 685                 return;
 686         }
 687
 688         if (!(rx_end->status & RX_RES_STATUS_NO_CRC32_ERROR)
 689             || !(rx_end->status & RX_RES_STATUS_NO_RXE_OVERFLOW)) {
 690                 IWL_DEBUG_RX("Bad CRC or FIFO: 0x%08X.\n", rx_end->status);
 691                 return;
 692         }
 693
 694         if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR) {
 695                 iwl3945_handle_data_packet(priv, 1, rxb, &rx_status);
 696                 return;
 697         }
 698
 699         /* Convert 3945's rssi indicator to dBm */
 700         rx_status.ssi = rx_stats->rssi - IWL_RSSI_OFFSET;
 701
 702         /* Set default noise value to -127 */
 703         if (priv->last_rx_noise == 0)
 704                 priv->last_rx_noise = IWL_NOISE_MEAS_NOT_AVAILABLE;
 705
 706         /* 3945 provides noise info for OFDM frames only.
 707          * sig_avg and noise_diff are measured by the 3945's digital signal
 708          *   processor (DSP), and indicate linear levels of signal level and
 709          *   distortion/noise within the packet preamble after
 710          *   automatic gain control (AGC).  sig_avg should stay fairly
 711          *   constant if the radio's AGC is working well.
 712          * Since these values are linear (not dB or dBm), linear
 713          *   signal-to-noise ratio (SNR) is (sig_avg / noise_diff).
 714          * Convert linear SNR to dB SNR, then subtract that from rssi dBm
 715          *   to obtain noise level in dBm.
 716          * Calculate rx_status.signal (quality indicator in %) based on SNR. */
 717         if (rx_stats_noise_diff) {
 718                 snr = rx_stats_sig_avg / rx_stats_noise_diff;
 719                 rx_status.noise = rx_status.ssi -
 720                                         iwl3945_calc_db_from_ratio(snr);
 721                 rx_status.signal = iwl3945_calc_sig_qual(rx_status.ssi,
 722                                                          rx_status.noise);
 723
 724         /* If noise info not available, calculate signal quality indicator (%)
 725          *   using just the dBm signal level. */
 726         } else {
 727                 rx_status.noise = priv->last_rx_noise;
 728                 rx_status.signal = iwl3945_calc_sig_qual(rx_status.ssi, 0);
 729         }
 730
 731
 732         IWL_DEBUG_STATS("Rssi %d noise %d qual %d sig_avg %d noise_diff %d\n",
 733                         rx_status.ssi, rx_status.noise, rx_status.signal,
 734                         rx_stats_sig_avg, rx_stats_noise_diff);
 735
 736         header = (struct ieee80211_hdr *)IWL_RX_DATA(pkt);
 737
 738         network_packet = iwl3945_is_network_packet(priv, header);
 739
 740         IWL_DEBUG_STATS_LIMIT("[%c] %d RSSI:%d Signal:%u, Noise:%u, Rate:%u\n",
 741                               network_packet ? '*' : ' ',
 742                               le16_to_cpu(rx_hdr->channel),
 743                               rx_status.ssi, rx_status.ssi,
 744                               rx_status.ssi, rx_status.rate_idx);
 745
 746 #ifdef CONFIG_IWL3945_DEBUG
 747         if (iwl3945_debug_level & (IWL_DL_RX))
 748                 /* Set "1" to report good data frames in groups of 100 */
 749                 iwl3945_dbg_report_frame(priv, pkt, header, 1);
 750 #endif
 751
 752         if (network_packet) {
 753                 priv->last_beacon_time = le32_to_cpu(rx_end->beacon_timestamp);
 754                 priv->last_tsf = le64_to_cpu(rx_end->timestamp);
 755                 priv->last_rx_rssi = rx_status.ssi;
 756                 priv->last_rx_noise = rx_status.noise;
 757         }
 758
 759         switch (le16_to_cpu(header->frame_control) & IEEE80211_FCTL_FTYPE) {
 760         case IEEE80211_FTYPE_MGMT:
 761                 switch (le16_to_cpu(header->frame_control) &
 762                         IEEE80211_FCTL_STYPE) {
 763                 case IEEE80211_STYPE_PROBE_RESP:
 764                 case IEEE80211_STYPE_BEACON:{
 765                                 /* If this is a beacon or probe response for
 766                                  * our network then cache the beacon
 767                                  * timestamp */
 768                                 if ((((priv->iw_mode == IEEE80211_IF_TYPE_STA)
 769                                       && !compare_ether_addr(header->addr2,
 770                                                              priv->bssid)) ||
 771                                      ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
 772                                       && !compare_ether_addr(header->addr3,
 773                                                              priv->bssid)))) {
 774                                         struct ieee80211_mgmt *mgmt =
 775                                             (struct ieee80211_mgmt *)header;
 776                                         __le32 *pos;
 777                                         pos =
 778                                             (__le32 *) & mgmt->u.beacon.
 779                                             timestamp;
 780                                         priv->timestamp0 = le32_to_cpu(pos[0]);
 781                                         priv->timestamp1 = le32_to_cpu(pos[1]);
 782                                         priv->beacon_int = le16_to_cpu(
 783                                             mgmt->u.beacon.beacon_int);
 784                                         if (priv->call_post_assoc_from_beacon &&
 785                                             (priv->iw_mode ==
 786                                                 IEEE80211_IF_TYPE_STA))
 787                                                 queue_work(priv->workqueue,
 788                                                     &priv->post_associate.work);
 789
 790                                         priv->call_post_assoc_from_beacon = 0;
 791                                 }
 792
 793                                 break;
 794                         }
 795
 796                 case IEEE80211_STYPE_ACTION:
 797                         /* TODO: Parse 802.11h frames for CSA... */
 798                         break;
 799
 800                         /*
 801                          * TODO: Use the new callback function from
 802                          * mac80211 instead of sniffing these packets.
 803                          */
 804                 case IEEE80211_STYPE_ASSOC_RESP:
 805                 case IEEE80211_STYPE_REASSOC_RESP:{
 806                                 struct ieee80211_mgmt *mgnt =
 807                                     (struct ieee80211_mgmt *)header;
 808
 809                                 /* We have just associated, give some
 810                                  * time for the 4-way handshake if
 811                                  * any. Don't start scan too early. */
 812                                 priv->next_scan_jiffies = jiffies +
 813                                         IWL_DELAY_NEXT_SCAN_AFTER_ASSOC;
 814
 815                                 priv->assoc_id = (~((1 << 15) | (1 << 14)) &
 816                                                   le16_to_cpu(mgnt->u.
 817                                                               assoc_resp.aid));
 818                                 priv->assoc_capability =
 819                                     le16_to_cpu(mgnt->u.assoc_resp.capab_info);
 820                                 if (priv->beacon_int)
 821                                         queue_work(priv->workqueue,
 822                                             &priv->post_associate.work);
 823                                 else
 824                                         priv->call_post_assoc_from_beacon = 1;
 825                                 break;
 826                         }
 827
 828                 case IEEE80211_STYPE_PROBE_REQ:{
 829                                 DECLARE_MAC_BUF(mac1);
 830                                 DECLARE_MAC_BUF(mac2);
 831                                 DECLARE_MAC_BUF(mac3);
 832                                 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
 833                                         IWL_DEBUG_DROP
 834                                             ("Dropping (non network): %s"
 835                                              ", %s, %s\n",
 836                                              print_mac(mac1, header->addr1),
 837                                              print_mac(mac2, header->addr2),
 838                                              print_mac(mac3, header->addr3));
 839                                 return;
 840                         }
 841                 }
 842
 843                 iwl3945_handle_data_packet(priv, 0, rxb, &rx_status);
 844                 break;
 845
 846         case IEEE80211_FTYPE_CTL:
 847                 break;
 848
 849         case IEEE80211_FTYPE_DATA: {
 850                 DECLARE_MAC_BUF(mac1);
 851                 DECLARE_MAC_BUF(mac2);
 852                 DECLARE_MAC_BUF(mac3);
 853
 854                 if (unlikely(iwl3945_is_duplicate_packet(priv, header)))
 855                         IWL_DEBUG_DROP("Dropping (dup): %s, %s, %s\n",
 856                                        print_mac(mac1, header->addr1),
 857                                        print_mac(mac2, header->addr2),
 858                                        print_mac(mac3, header->addr3));
 859                 else
 860                         iwl3945_handle_data_packet(priv, 1, rxb, &rx_status);
 861                 break;
 862         }
 863         }
 864 }
 865
 866 int iwl3945_hw_txq_attach_buf_to_tfd(struct iwl3945_priv *priv, void *ptr,
 867                                  dma_addr_t addr, u16 len)
 868 {
 869         int count;
 870         u32 pad;
 871         struct iwl3945_tfd_frame *tfd = (struct iwl3945_tfd_frame *)ptr;
 872
 873         count = TFD_CTL_COUNT_GET(le32_to_cpu(tfd->control_flags));
 874         pad = TFD_CTL_PAD_GET(le32_to_cpu(tfd->control_flags));
 875
 876         if ((count >= NUM_TFD_CHUNKS) || (count < 0)) {
 877                 IWL_ERROR("Error can not send more than %d chunks\n",
 878                           NUM_TFD_CHUNKS);
 879                 return -EINVAL;
 880         }
 881
 882         tfd->pa[count].addr = cpu_to_le32(addr);
 883         tfd->pa[count].len = cpu_to_le32(len);
 884
 885         count++;
 886
 887         tfd->control_flags = cpu_to_le32(TFD_CTL_COUNT_SET(count) |
 888                                          TFD_CTL_PAD_SET(pad));
 889
 890         return 0;
 891 }
 892
 893 /**
 894  * iwl3945_hw_txq_free_tfd - Free one TFD, those at index [txq->q.read_ptr]
 895  *
 896  * Does NOT advance any indexes
 897  */
 898 int iwl3945_hw_txq_free_tfd(struct iwl3945_priv *priv, struct iwl3945_tx_queue *txq)
 899 {
 900         struct iwl3945_tfd_frame *bd_tmp = (struct iwl3945_tfd_frame *)&txq->bd[0];
 901         struct iwl3945_tfd_frame *bd = &bd_tmp[txq->q.read_ptr];
 902         struct pci_dev *dev = priv->pci_dev;
 903         int i;
 904         int counter;
 905
 906         /* classify bd */
 907         if (txq->q.id == IWL_CMD_QUEUE_NUM)
 908                 /* nothing to cleanup after for host commands */
 909                 return 0;
 910
 911         /* sanity check */
 912         counter = TFD_CTL_COUNT_GET(le32_to_cpu(bd->control_flags));
 913         if (counter > NUM_TFD_CHUNKS) {
 914                 IWL_ERROR("Too many chunks: %i\n", counter);
 915                 /* @todo issue fatal error, it is quite serious situation */
 916                 return 0;
 917         }
 918
 919         /* unmap chunks if any */
 920
 921         for (i = 1; i < counter; i++) {
 922                 pci_unmap_single(dev, le32_to_cpu(bd->pa[i].addr),
 923                                  le32_to_cpu(bd->pa[i].len), PCI_DMA_TODEVICE);
 924                 if (txq->txb[txq->q.read_ptr].skb[0]) {
 925                         struct sk_buff *skb = txq->txb[txq->q.read_ptr].skb[0];
 926                         if (txq->txb[txq->q.read_ptr].skb[0]) {
 927                                 /* Can be called from interrupt context */
 928                                 dev_kfree_skb_any(skb);
 929                                 txq->txb[txq->q.read_ptr].skb[0] = NULL;
 930                         }
 931                 }
 932         }
 933         return 0;
 934 }
 935
 936 u8 iwl3945_hw_find_station(struct iwl3945_priv *priv, const u8 *addr)
 937 {
 938         int i;
 939         int ret = IWL_INVALID_STATION;
 940         unsigned long flags;
 941         DECLARE_MAC_BUF(mac);
 942
 943         spin_lock_irqsave(&priv->sta_lock, flags);
 944         for (i = IWL_STA_ID; i < priv->hw_setting.max_stations; i++)
 945                 if ((priv->stations[i].used) &&
 946                     (!compare_ether_addr
 947                      (priv->stations[i].sta.sta.addr, addr))) {
 948                         ret = i;
 949                         goto out;
 950                 }
 951
 952         IWL_DEBUG_INFO("can not find STA %s (total %d)\n",
 953                        print_mac(mac, addr), priv->num_stations);
 954  out:
 955         spin_unlock_irqrestore(&priv->sta_lock, flags);
 956         return ret;
 957 }
 958
 959 /**
 960  * iwl3945_hw_build_tx_cmd_rate - Add rate portion to TX_CMD:
 961  *
 962 */
 963 void iwl3945_hw_build_tx_cmd_rate(struct iwl3945_priv *priv,
 964                               struct iwl3945_cmd *cmd,
 965                               struct ieee80211_tx_control *ctrl,
 966                               struct ieee80211_hdr *hdr, int sta_id, int tx_id)
 967 {
 968         unsigned long flags;
 969         u16 rate_index = min(ctrl->tx_rate->hw_value & 0xffff, IWL_RATE_COUNT - 1);
 970         u16 rate_mask;
 971         int rate;
 972         u8 rts_retry_limit;
 973         u8 data_retry_limit;
 974         __le32 tx_flags;
 975         u16 fc = le16_to_cpu(hdr->frame_control);
 976
 977         rate = iwl3945_rates[rate_index].plcp;
 978         tx_flags = cmd->cmd.tx.tx_flags;
 979
 980         /* We need to figure out how to get the sta->supp_rates while
 981          * in this running context; perhaps encoding into ctrl->tx_rate? */
 982         rate_mask = IWL_RATES_MASK;
 983
 984         spin_lock_irqsave(&priv->sta_lock, flags);
 985
 986         priv->stations[sta_id].current_rate.rate_n_flags = rate;
 987
 988         if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) &&
 989             (sta_id != priv->hw_setting.bcast_sta_id) &&
 990                 (sta_id != IWL_MULTICAST_ID))
 991                 priv->stations[IWL_STA_ID].current_rate.rate_n_flags = rate;
 992
 993         spin_unlock_irqrestore(&priv->sta_lock, flags);
 994
 995         if (tx_id >= IWL_CMD_QUEUE_NUM)
 996                 rts_retry_limit = 3;
 997         else
 998                 rts_retry_limit = 7;
 999
1000         if (ieee80211_is_probe_response(fc)) {
1001                 data_retry_limit = 3;
1002                 if (data_retry_limit < rts_retry_limit)
1003                         rts_retry_limit = data_retry_limit;
1004         } else
1005                 data_retry_limit = IWL_DEFAULT_TX_RETRY;
1006
1007         if (priv->data_retry_limit != -1)
1008                 data_retry_limit = priv->data_retry_limit;
1009
1010         if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
1011                 switch (fc & IEEE80211_FCTL_STYPE) {
1012                 case IEEE80211_STYPE_AUTH:
1013                 case IEEE80211_STYPE_DEAUTH:
1014                 case IEEE80211_STYPE_ASSOC_REQ:
1015                 case IEEE80211_STYPE_REASSOC_REQ:
1016                         if (tx_flags & TX_CMD_FLG_RTS_MSK) {
1017                                 tx_flags &= ~TX_CMD_FLG_RTS_MSK;
1018                                 tx_flags |= TX_CMD_FLG_CTS_MSK;
1019                         }
1020                         break;
1021                 default:
1022                         break;
1023                 }
1024         }
1025
1026         cmd->cmd.tx.rts_retry_limit = rts_retry_limit;
1027         cmd->cmd.tx.data_retry_limit = data_retry_limit;
1028         cmd->cmd.tx.rate = rate;
1029         cmd->cmd.tx.tx_flags = tx_flags;
1030
1031         /* OFDM */
1032         cmd->cmd.tx.supp_rates[0] =
1033            ((rate_mask & IWL_OFDM_RATES_MASK) >> IWL_FIRST_OFDM_RATE) & 0xFF;
1034
1035         /* CCK */
1036         cmd->cmd.tx.supp_rates[1] = (rate_mask & 0xF);
1037
1038         IWL_DEBUG_RATE("Tx sta id: %d, rate: %d (plcp), flags: 0x%4X "
1039                        "cck/ofdm mask: 0x%x/0x%x\n", sta_id,
1040                        cmd->cmd.tx.rate, le32_to_cpu(cmd->cmd.tx.tx_flags),
1041                        cmd->cmd.tx.supp_rates[1], cmd->cmd.tx.supp_rates[0]);
1042 }
1043
1044 u8 iwl3945_sync_sta(struct iwl3945_priv *priv, int sta_id, u16 tx_rate, u8 flags)
1045 {
1046         unsigned long flags_spin;
1047         struct iwl3945_station_entry *station;
1048
1049         if (sta_id == IWL_INVALID_STATION)
1050                 return IWL_INVALID_STATION;
1051
1052         spin_lock_irqsave(&priv->sta_lock, flags_spin);
1053         station = &priv->stations[sta_id];
1054
1055         station->sta.sta.modify_mask = STA_MODIFY_TX_RATE_MSK;
1056         station->sta.rate_n_flags = cpu_to_le16(tx_rate);
1057         station->current_rate.rate_n_flags = tx_rate;
1058         station->sta.mode = STA_CONTROL_MODIFY_MSK;
1059
1060         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
1061
1062         iwl3945_send_add_station(priv, &station->sta, flags);
1063         IWL_DEBUG_RATE("SCALE sync station %d to rate %d\n",
1064                         sta_id, tx_rate);
1065         return sta_id;
1066 }
1067
1068 static int iwl3945_nic_set_pwr_src(struct iwl3945_priv *priv, int pwr_max)
1069 {
1070         int rc;
1071         unsigned long flags;
1072
1073         spin_lock_irqsave(&priv->lock, flags);
1074         rc = iwl3945_grab_nic_access(priv);
1075         if (rc) {
1076                 spin_unlock_irqrestore(&priv->lock, flags);
1077                 return rc;
1078         }
1079
1080         if (!pwr_max) {
1081                 u32 val;
1082
1083                 rc = pci_read_config_dword(priv->pci_dev,
1084                                 PCI_POWER_SOURCE, &val);
1085                 if (val & PCI_CFG_PMC_PME_FROM_D3COLD_SUPPORT) {
1086                         iwl3945_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
1087                                         APMG_PS_CTRL_VAL_PWR_SRC_VAUX,
1088                                         ~APMG_PS_CTRL_MSK_PWR_SRC);
1089                         iwl3945_release_nic_access(priv);
1090
1091                         iwl3945_poll_bit(priv, CSR_GPIO_IN,
1092                                      CSR_GPIO_IN_VAL_VAUX_PWR_SRC,
1093                                      CSR_GPIO_IN_BIT_AUX_POWER, 5000);
1094                 } else
1095                         iwl3945_release_nic_access(priv);
1096         } else {
1097                 iwl3945_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
1098                                 APMG_PS_CTRL_VAL_PWR_SRC_VMAIN,
1099                                 ~APMG_PS_CTRL_MSK_PWR_SRC);
1100
1101                 iwl3945_release_nic_access(priv);
1102                 iwl3945_poll_bit(priv, CSR_GPIO_IN, CSR_GPIO_IN_VAL_VMAIN_PWR_SRC,
1103                              CSR_GPIO_IN_BIT_AUX_POWER, 5000);  /* uS */
1104         }
1105         spin_unlock_irqrestore(&priv->lock, flags);
1106
1107         return rc;
1108 }
1109
1110 static int iwl3945_rx_init(struct iwl3945_priv *priv, struct iwl3945_rx_queue *rxq)
1111 {
1112         int rc;
1113         unsigned long flags;
1114
1115         spin_lock_irqsave(&priv->lock, flags);
1116         rc = iwl3945_grab_nic_access(priv);
1117         if (rc) {
1118                 spin_unlock_irqrestore(&priv->lock, flags);
1119                 return rc;
1120         }
1121
1122         iwl3945_write_direct32(priv, FH_RCSR_RBD_BASE(0), rxq->dma_addr);
1123         iwl3945_write_direct32(priv, FH_RCSR_RPTR_ADDR(0),
1124                              priv->hw_setting.shared_phys +
1125                              offsetof(struct iwl3945_shared, rx_read_ptr[0]));
1126         iwl3945_write_direct32(priv, FH_RCSR_WPTR(0), 0);
1127         iwl3945_write_direct32(priv, FH_RCSR_CONFIG(0),
1128                 ALM_FH_RCSR_RX_CONFIG_REG_VAL_DMA_CHNL_EN_ENABLE |
1129                 ALM_FH_RCSR_RX_CONFIG_REG_VAL_RDRBD_EN_ENABLE |
1130                 ALM_FH_RCSR_RX_CONFIG_REG_BIT_WR_STTS_EN |
1131                 ALM_FH_RCSR_RX_CONFIG_REG_VAL_MAX_FRAG_SIZE_128 |
1132                 (RX_QUEUE_SIZE_LOG << ALM_FH_RCSR_RX_CONFIG_REG_POS_RBDC_SIZE) |
1133                 ALM_FH_RCSR_RX_CONFIG_REG_VAL_IRQ_DEST_INT_HOST |
1134                 (1 << ALM_FH_RCSR_RX_CONFIG_REG_POS_IRQ_RBTH) |
1135                 ALM_FH_RCSR_RX_CONFIG_REG_VAL_MSG_MODE_FH);
1136
1137         /* fake read to flush all prev I/O */
1138         iwl3945_read_direct32(priv, FH_RSSR_CTRL);
1139
1140         iwl3945_release_nic_access(priv);
1141         spin_unlock_irqrestore(&priv->lock, flags);
1142
1143         return 0;
1144 }
1145
1146 static int iwl3945_tx_reset(struct iwl3945_priv *priv)
1147 {
1148         int rc;
1149         unsigned long flags;
1150
1151         spin_lock_irqsave(&priv->lock, flags);
1152         rc = iwl3945_grab_nic_access(priv);
1153         if (rc) {
1154                 spin_unlock_irqrestore(&priv->lock, flags);
1155                 return rc;
1156         }
1157
1158         /* bypass mode */
1159         iwl3945_write_prph(priv, ALM_SCD_MODE_REG, 0x2);
1160
1161         /* RA 0 is active */
1162         iwl3945_write_prph(priv, ALM_SCD_ARASTAT_REG, 0x01);
1163
1164         /* all 6 fifo are active */
1165         iwl3945_write_prph(priv, ALM_SCD_TXFACT_REG, 0x3f);
1166
1167         iwl3945_write_prph(priv, ALM_SCD_SBYP_MODE_1_REG, 0x010000);
1168         iwl3945_write_prph(priv, ALM_SCD_SBYP_MODE_2_REG, 0x030002);
1169         iwl3945_write_prph(priv, ALM_SCD_TXF4MF_REG, 0x000004);
1170         iwl3945_write_prph(priv, ALM_SCD_TXF5MF_REG, 0x000005);
1171
1172         iwl3945_write_direct32(priv, FH_TSSR_CBB_BASE,
1173                              priv->hw_setting.shared_phys);
1174
1175         iwl3945_write_direct32(priv, FH_TSSR_MSG_CONFIG,
1176                 ALM_FH_TSSR_TX_MSG_CONFIG_REG_VAL_SNOOP_RD_TXPD_ON |
1177                 ALM_FH_TSSR_TX_MSG_CONFIG_REG_VAL_ORDER_RD_TXPD_ON |
1178                 ALM_FH_TSSR_TX_MSG_CONFIG_REG_VAL_MAX_FRAG_SIZE_128B |
1179                 ALM_FH_TSSR_TX_MSG_CONFIG_REG_VAL_SNOOP_RD_TFD_ON |
1180                 ALM_FH_TSSR_TX_MSG_CONFIG_REG_VAL_ORDER_RD_CBB_ON |
1181                 ALM_FH_TSSR_TX_MSG_CONFIG_REG_VAL_ORDER_RSP_WAIT_TH |
1182                 ALM_FH_TSSR_TX_MSG_CONFIG_REG_VAL_RSP_WAIT_TH);
1183
1184         iwl3945_release_nic_access(priv);
1185         spin_unlock_irqrestore(&priv->lock, flags);
1186
1187         return 0;
1188 }
1189
1190 /**
1191  * iwl3945_txq_ctx_reset - Reset TX queue context
1192  *
1193  * Destroys all DMA structures and initialize them again
1194  */
1195 static int iwl3945_txq_ctx_reset(struct iwl3945_priv *priv)
1196 {
1197         int rc;
1198         int txq_id, slots_num;
1199
1200         iwl3945_hw_txq_ctx_free(priv);
1201
1202         /* Tx CMD queue */
1203         rc = iwl3945_tx_reset(priv);
1204         if (rc)
1205                 goto error;
1206
1207         /* Tx queue(s) */
1208         for (txq_id = 0; txq_id < TFD_QUEUE_MAX; txq_id++) {
1209                 slots_num = (txq_id == IWL_CMD_QUEUE_NUM) ?
1210                                 TFD_CMD_SLOTS : TFD_TX_CMD_SLOTS;
1211                 rc = iwl3945_tx_queue_init(priv, &priv->txq[txq_id], slots_num,
1212                                 txq_id);
1213                 if (rc) {
1214                         IWL_ERROR("Tx %d queue init failed\n", txq_id);
1215                         goto error;
1216                 }
1217         }
1218
1219         return rc;
1220
1221  error:
1222         iwl3945_hw_txq_ctx_free(priv);
1223         return rc;
1224 }
1225
1226 int iwl3945_hw_nic_init(struct iwl3945_priv *priv)
1227 {
1228         u8 rev_id;
1229         int rc;
1230         unsigned long flags;
1231         struct iwl3945_rx_queue *rxq = &priv->rxq;
1232
1233         iwl3945_power_init_handle(priv);
1234
1235         spin_lock_irqsave(&priv->lock, flags);
1236         iwl3945_set_bit(priv, CSR_ANA_PLL_CFG, (1 << 24));
1237         iwl3945_set_bit(priv, CSR_GIO_CHICKEN_BITS,
1238                     CSR_GIO_CHICKEN_BITS_REG_BIT_L1A_NO_L0S_RX);
1239
1240         iwl3945_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
1241         rc = iwl3945_poll_bit(priv, CSR_GP_CNTRL,
1242                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
1243                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
1244         if (rc < 0) {
1245                 spin_unlock_irqrestore(&priv->lock, flags);
1246                 IWL_DEBUG_INFO("Failed to init the card\n");
1247                 return rc;
1248         }
1249
1250         rc = iwl3945_grab_nic_access(priv);
1251         if (rc) {
1252                 spin_unlock_irqrestore(&priv->lock, flags);
1253                 return rc;
1254         }
1255         iwl3945_write_prph(priv, APMG_CLK_EN_REG,
1256                                  APMG_CLK_VAL_DMA_CLK_RQT |
1257                                  APMG_CLK_VAL_BSM_CLK_RQT);
1258         udelay(20);
1259         iwl3945_set_bits_prph(priv, APMG_PCIDEV_STT_REG,
1260                                     APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
1261         iwl3945_release_nic_access(priv);
1262         spin_unlock_irqrestore(&priv->lock, flags);
1263
1264         /* Determine HW type */
1265         rc = pci_read_config_byte(priv->pci_dev, PCI_REVISION_ID, &rev_id);
1266         if (rc)
1267                 return rc;
1268         IWL_DEBUG_INFO("HW Revision ID = 0x%X\n", rev_id);
1269
1270         iwl3945_nic_set_pwr_src(priv, 1);
1271         spin_lock_irqsave(&priv->lock, flags);
1272
1273         if (rev_id & PCI_CFG_REV_ID_BIT_RTP)
1274                 IWL_DEBUG_INFO("RTP type \n");
1275         else if (rev_id & PCI_CFG_REV_ID_BIT_BASIC_SKU) {
1276                 IWL_DEBUG_INFO("3945 RADIO-MB type\n");
1277                 iwl3945_set_bit(priv, CSR_HW_IF_CONFIG_REG,
1278                             CSR39_HW_IF_CONFIG_REG_BIT_3945_MB);
1279         } else {
1280                 IWL_DEBUG_INFO("3945 RADIO-MM type\n");
1281                 iwl3945_set_bit(priv, CSR_HW_IF_CONFIG_REG,
1282                             CSR39_HW_IF_CONFIG_REG_BIT_3945_MM);
1283         }
1284
1285         if (EEPROM_SKU_CAP_OP_MODE_MRC == priv->eeprom.sku_cap) {
1286                 IWL_DEBUG_INFO("SKU OP mode is mrc\n");
1287                 iwl3945_set_bit(priv, CSR_HW_IF_CONFIG_REG,
1288                             CSR39_HW_IF_CONFIG_REG_BIT_SKU_MRC);
1289         } else
1290                 IWL_DEBUG_INFO("SKU OP mode is basic\n");
1291
1292         if ((priv->eeprom.board_revision & 0xF0) == 0xD0) {
1293                 IWL_DEBUG_INFO("3945ABG revision is 0x%X\n",
1294                                priv->eeprom.board_revision);
1295                 iwl3945_set_bit(priv, CSR_HW_IF_CONFIG_REG,
1296                             CSR39_HW_IF_CONFIG_REG_BIT_BOARD_TYPE);
1297         } else {
1298                 IWL_DEBUG_INFO("3945ABG revision is 0x%X\n",
1299                                priv->eeprom.board_revision);
1300                 iwl3945_clear_bit(priv, CSR_HW_IF_CONFIG_REG,
1301                               CSR39_HW_IF_CONFIG_REG_BIT_BOARD_TYPE);
1302         }
1303
1304         if (priv->eeprom.almgor_m_version <= 1) {
1305                 iwl3945_set_bit(priv, CSR_HW_IF_CONFIG_REG,
1306                             CSR39_HW_IF_CONFIG_REG_BITS_SILICON_TYPE_A);
1307                 IWL_DEBUG_INFO("Card M type A version is 0x%X\n",
1308                                priv->eeprom.almgor_m_version);
1309         } else {
1310                 IWL_DEBUG_INFO("Card M type B version is 0x%X\n",
1311                                priv->eeprom.almgor_m_version);
1312                 iwl3945_set_bit(priv, CSR_HW_IF_CONFIG_REG,
1313                             CSR39_HW_IF_CONFIG_REG_BITS_SILICON_TYPE_B);
1314         }
1315         spin_unlock_irqrestore(&priv->lock, flags);
1316
1317         if (priv->eeprom.sku_cap & EEPROM_SKU_CAP_SW_RF_KILL_ENABLE)
1318                 IWL_DEBUG_RF_KILL("SW RF KILL supported in EEPROM.\n");
1319
1320         if (priv->eeprom.sku_cap & EEPROM_SKU_CAP_HW_RF_KILL_ENABLE)
1321                 IWL_DEBUG_RF_KILL("HW RF KILL supported in EEPROM.\n");
1322
1323         /* Allocate the RX queue, or reset if it is already allocated */
1324         if (!rxq->bd) {
1325                 rc = iwl3945_rx_queue_alloc(priv);
1326                 if (rc) {
1327                         IWL_ERROR("Unable to initialize Rx queue\n");
1328                         return -ENOMEM;
1329                 }
1330         } else
1331                 iwl3945_rx_queue_reset(priv, rxq);
1332
1333         iwl3945_rx_replenish(priv);
1334
1335         iwl3945_rx_init(priv, rxq);
1336
1337         spin_lock_irqsave(&priv->lock, flags);
1338
1339         /* Look at using this instead:
1340         rxq->need_update = 1;
1341         iwl3945_rx_queue_update_write_ptr(priv, rxq);
1342         */
1343
1344         rc = iwl3945_grab_nic_access(priv);
1345         if (rc) {
1346                 spin_unlock_irqrestore(&priv->lock, flags);
1347                 return rc;
1348         }
1349         iwl3945_write_direct32(priv, FH_RCSR_WPTR(0), rxq->write & ~7);
1350         iwl3945_release_nic_access(priv);
1351
1352         spin_unlock_irqrestore(&priv->lock, flags);
1353
1354         rc = iwl3945_txq_ctx_reset(priv);
1355         if (rc)
1356                 return rc;
1357
1358         set_bit(STATUS_INIT, &priv->status);
1359
1360         return 0;
1361 }
1362
1363 /**
1364  * iwl3945_hw_txq_ctx_free - Free TXQ Context
1365  *
1366  * Destroy all TX DMA queues and structures
1367  */
1368 void iwl3945_hw_txq_ctx_free(struct iwl3945_priv *priv)
1369 {
1370         int txq_id;
1371
1372         /* Tx queues */
1373         for (txq_id = 0; txq_id < TFD_QUEUE_MAX; txq_id++)
1374                 iwl3945_tx_queue_free(priv, &priv->txq[txq_id]);
1375 }
1376
1377 void iwl3945_hw_txq_ctx_stop(struct iwl3945_priv *priv)
1378 {
1379         int queue;
1380         unsigned long flags;
1381
1382         spin_lock_irqsave(&priv->lock, flags);
1383         if (iwl3945_grab_nic_access(priv)) {
1384                 spin_unlock_irqrestore(&priv->lock, flags);
1385                 iwl3945_hw_txq_ctx_free(priv);
1386                 return;
1387         }
1388
1389         /* stop SCD */
1390         iwl3945_write_prph(priv, ALM_SCD_MODE_REG, 0);
1391
1392         /* reset TFD queues */
1393         for (queue = TFD_QUEUE_MIN; queue < TFD_QUEUE_MAX; queue++) {
1394                 iwl3945_write_direct32(priv, FH_TCSR_CONFIG(queue), 0x0);
1395                 iwl3945_poll_direct_bit(priv, FH_TSSR_TX_STATUS,
1396                                 ALM_FH_TSSR_TX_STATUS_REG_MSK_CHNL_IDLE(queue),
1397                                 1000);
1398         }
1399
1400         iwl3945_release_nic_access(priv);
1401         spin_unlock_irqrestore(&priv->lock, flags);
1402
1403         iwl3945_hw_txq_ctx_free(priv);
1404 }
1405
1406 int iwl3945_hw_nic_stop_master(struct iwl3945_priv *priv)
1407 {
1408         int rc = 0;
1409         u32 reg_val;
1410         unsigned long flags;
1411
1412         spin_lock_irqsave(&priv->lock, flags);
1413
1414         /* set stop master bit */
1415         iwl3945_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
1416
1417         reg_val = iwl3945_read32(priv, CSR_GP_CNTRL);
1418
1419         if (CSR_GP_CNTRL_REG_FLAG_MAC_POWER_SAVE ==
1420             (reg_val & CSR_GP_CNTRL_REG_MSK_POWER_SAVE_TYPE))
1421                 IWL_DEBUG_INFO("Card in power save, master is already "
1422                                "stopped\n");
1423         else {
1424                 rc = iwl3945_poll_bit(priv, CSR_RESET,
1425                                   CSR_RESET_REG_FLAG_MASTER_DISABLED,
1426                                   CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
1427                 if (rc < 0) {
1428                         spin_unlock_irqrestore(&priv->lock, flags);
1429                         return rc;
1430                 }
1431         }
1432
1433         spin_unlock_irqrestore(&priv->lock, flags);
1434         IWL_DEBUG_INFO("stop master\n");
1435
1436         return rc;
1437 }
1438
1439 int iwl3945_hw_nic_reset(struct iwl3945_priv *priv)
1440 {
1441         int rc;
1442         unsigned long flags;
1443
1444         iwl3945_hw_nic_stop_master(priv);
1445
1446         spin_lock_irqsave(&priv->lock, flags);
1447
1448         iwl3945_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
1449
1450         rc = iwl3945_poll_bit(priv, CSR_GP_CNTRL,
1451                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
1452                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
1453
1454         rc = iwl3945_grab_nic_access(priv);
1455         if (!rc) {
1456                 iwl3945_write_prph(priv, APMG_CLK_CTRL_REG,
1457                                          APMG_CLK_VAL_BSM_CLK_RQT);
1458
1459                 udelay(10);
1460
1461                 iwl3945_set_bit(priv, CSR_GP_CNTRL,
1462                             CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
1463
1464                 iwl3945_write_prph(priv, APMG_RTC_INT_MSK_REG, 0x0);
1465                 iwl3945_write_prph(priv, APMG_RTC_INT_STT_REG,
1466                                         0xFFFFFFFF);
1467
1468                 /* enable DMA */
1469                 iwl3945_write_prph(priv, APMG_CLK_EN_REG,
1470                                          APMG_CLK_VAL_DMA_CLK_RQT |
1471                                          APMG_CLK_VAL_BSM_CLK_RQT);
1472                 udelay(10);
1473
1474                 iwl3945_set_bits_prph(priv, APMG_PS_CTRL_REG,
1475                                 APMG_PS_CTRL_VAL_RESET_REQ);
1476                 udelay(5);
1477                 iwl3945_clear_bits_prph(priv, APMG_PS_CTRL_REG,
1478                                 APMG_PS_CTRL_VAL_RESET_REQ);
1479                 iwl3945_release_nic_access(priv);
1480         }
1481
1482         /* Clear the 'host command active' bit... */
1483         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
1484
1485         wake_up_interruptible(&priv->wait_command_queue);
1486         spin_unlock_irqrestore(&priv->lock, flags);
1487
1488         return rc;
1489 }
1490
1491 /**
1492  * iwl3945_hw_reg_adjust_power_by_temp
1493  * return index delta into power gain settings table
1494 */
1495 static int iwl3945_hw_reg_adjust_power_by_temp(int new_reading, int old_reading)
1496 {
1497         return (new_reading - old_reading) * (-11) / 100;
1498 }
1499
1500 /**
1501  * iwl3945_hw_reg_temp_out_of_range - Keep temperature in sane range
1502  */
1503 static inline int iwl3945_hw_reg_temp_out_of_range(int temperature)
1504 {
1505         return (((temperature < -260) || (temperature > 25)) ? 1 : 0);
1506 }
1507
1508 int iwl3945_hw_get_temperature(struct iwl3945_priv *priv)
1509 {
1510         return iwl3945_read32(priv, CSR_UCODE_DRV_GP2);
1511 }
1512
1513 /**
1514  * iwl3945_hw_reg_txpower_get_temperature
1515  * get the current temperature by reading from NIC
1516 */
1517 static int iwl3945_hw_reg_txpower_get_temperature(struct iwl3945_priv *priv)
1518 {
1519         int temperature;
1520
1521         temperature = iwl3945_hw_get_temperature(priv);
1522
1523         /* driver's okay range is -260 to +25.
1524          *   human readable okay range is 0 to +285 */
1525         IWL_DEBUG_INFO("Temperature: %d\n", temperature + IWL_TEMP_CONVERT);
1526
1527         /* handle insane temp reading */
1528         if (iwl3945_hw_reg_temp_out_of_range(temperature)) {
1529                 IWL_ERROR("Error bad temperature value  %d\n", temperature);
1530
1531                 /* if really really hot(?),
1532                  *   substitute the 3rd band/group's temp measured at factory */
1533                 if (priv->last_temperature > 100)
1534                         temperature = priv->eeprom.groups[2].temperature;
1535                 else /* else use most recent "sane" value from driver */
1536                         temperature = priv->last_temperature;
1537         }
1538
1539         return temperature;     /* raw, not "human readable" */
1540 }
1541
1542 /* Adjust Txpower only if temperature variance is greater than threshold.
1543  *
1544  * Both are lower than older versions' 9 degrees */
1545 #define IWL_TEMPERATURE_LIMIT_TIMER   6
1546
1547 /**
1548  * is_temp_calib_needed - determines if new calibration is needed
1549  *
1550  * records new temperature in tx_mgr->temperature.
1551  * replaces tx_mgr->last_temperature *only* if calib needed
1552  *    (assumes caller will actually do the calibration!). */
1553 static int is_temp_calib_needed(struct iwl3945_priv *priv)
1554 {
1555         int temp_diff;
1556
1557         priv->temperature = iwl3945_hw_reg_txpower_get_temperature(priv);
1558         temp_diff = priv->temperature - priv->last_temperature;
1559
1560         /* get absolute value */
1561         if (temp_diff < 0) {
1562                 IWL_DEBUG_POWER("Getting cooler, delta %d,\n", temp_diff);
1563                 temp_diff = -temp_diff;
1564         } else if (temp_diff == 0)
1565                 IWL_DEBUG_POWER("Same temp,\n");
1566         else
1567                 IWL_DEBUG_POWER("Getting warmer, delta %d,\n", temp_diff);
1568
1569         /* if we don't need calibration, *don't* update last_temperature */
1570         if (temp_diff < IWL_TEMPERATURE_LIMIT_TIMER) {
1571                 IWL_DEBUG_POWER("Timed thermal calib not needed\n");
1572                 return 0;
1573         }
1574
1575         IWL_DEBUG_POWER("Timed thermal calib needed\n");
1576
1577         /* assume that caller will actually do calib ...
1578          *   update the "last temperature" value */
1579         priv->last_temperature = priv->temperature;
1580         return 1;
1581 }
1582
1583 #define IWL_MAX_GAIN_ENTRIES 78
1584 #define IWL_CCK_FROM_OFDM_POWER_DIFF  -5
1585 #define IWL_CCK_FROM_OFDM_INDEX_DIFF (10)
1586
1587 /* radio and DSP power table, each step is 1/2 dB.
1588  * 1st number is for RF analog gain, 2nd number is for DSP pre-DAC gain. */
1589 static struct iwl3945_tx_power power_gain_table[2][IWL_MAX_GAIN_ENTRIES] = {
1590         {
1591          {251, 127},            /* 2.4 GHz, highest power */
1592          {251, 127},
1593          {251, 127},
1594          {251, 127},
1595          {251, 125},
1596          {251, 110},
1597          {251, 105},
1598          {251, 98},
1599          {187, 125},
1600          {187, 115},
1601          {187, 108},
1602          {187, 99},
1603          {243, 119},
1604          {243, 111},
1605          {243, 105},
1606          {243, 97},
1607          {243, 92},
1608          {211, 106},
1609          {211, 100},
1610          {179, 120},
1611          {179, 113},
1612          {179, 107},
1613          {147, 125},
1614          {147, 119},
1615          {147, 112},
1616          {147, 106},
1617          {147, 101},
1618          {147, 97},
1619          {147, 91},
1620          {115, 107},
1621          {235, 121},
1622          {235, 115},
1623          {235, 109},
1624          {203, 127},
1625          {203, 121},
1626          {203, 115},
1627          {203, 108},
1628          {203, 102},
1629          {203, 96},
1630          {203, 92},
1631          {171, 110},
1632          {171, 104},
1633          {171, 98},
1634          {139, 116},
1635          {227, 125},
1636          {227, 119},
1637          {227, 113},
1638          {227, 107},
1639          {227, 101},
1640          {227, 96},
1641          {195, 113},
1642          {195, 106},
1643          {195, 102},
1644          {195, 95},
1645          {163, 113},
1646          {163, 106},
1647          {163, 102},
1648          {163, 95},
1649          {131, 113},
1650          {131, 106},
1651          {131, 102},
1652          {131, 95},
1653          {99, 113},
1654          {99, 106},
1655          {99, 102},
1656          {99, 95},
1657          {67, 113},
1658          {67, 106},
1659          {67, 102},
1660          {67, 95},
1661          {35, 113},
1662          {35, 106},
1663          {35, 102},
1664          {35, 95},
1665          {3, 113},
1666          {3, 106},
1667          {3, 102},
1668          {3, 95} },             /* 2.4 GHz, lowest power */
1669         {
1670          {251, 127},            /* 5.x GHz, highest power */
1671          {251, 120},
1672          {251, 114},
1673          {219, 119},
1674          {219, 101},
1675          {187, 113},
1676          {187, 102},
1677          {155, 114},
1678          {155, 103},
1679          {123, 117},
1680          {123, 107},
1681          {123, 99},
1682          {123, 92},
1683          {91, 108},
1684          {59, 125},
1685          {59, 118},
1686          {59, 109},
1687          {59, 102},
1688          {59, 96},
1689          {59, 90},
1690          {27, 104},
1691          {27, 98},
1692          {27, 92},
1693          {115, 118},
1694          {115, 111},
1695          {115, 104},
1696          {83, 126},
1697          {83, 121},
1698          {83, 113},
1699          {83, 105},
1700          {83, 99},
1701          {51, 118},
1702          {51, 111},
1703          {51, 104},
1704          {51, 98},
1705          {19, 116},
1706          {19, 109},
1707          {19, 102},
1708          {19, 98},
1709          {19, 93},
1710          {171, 113},
1711          {171, 107},
1712          {171, 99},
1713          {139, 120},
1714          {139, 113},
1715          {139, 107},
1716          {139, 99},
1717          {107, 120},
1718          {107, 113},
1719          {107, 107},
1720          {107, 99},
1721          {75, 120},
1722          {75, 113},
1723          {75, 107},
1724          {75, 99},
1725          {43, 120},
1726          {43, 113},
1727          {43, 107},
1728          {43, 99},
1729          {11, 120},
1730          {11, 113},
1731          {11, 107},
1732          {11, 99},
1733          {131, 107},
1734          {131, 99},
1735          {99, 120},
1736          {99, 113},
1737          {99, 107},
1738          {99, 99},
1739          {67, 120},
1740          {67, 113},
1741          {67, 107},
1742          {67, 99},
1743          {35, 120},
1744          {35, 113},
1745          {35, 107},
1746          {35, 99},
1747          {3, 120} }             /* 5.x GHz, lowest power */
1748 };
1749
1750 static inline u8 iwl3945_hw_reg_fix_power_index(int index)
1751 {
1752         if (index < 0)
1753                 return 0;
1754         if (index >= IWL_MAX_GAIN_ENTRIES)
1755                 return IWL_MAX_GAIN_ENTRIES - 1;
1756         return (u8) index;
1757 }
1758
1759 /* Kick off thermal recalibration check every 60 seconds */
1760 #define REG_RECALIB_PERIOD (60)
1761
1762 /**
1763  * iwl3945_hw_reg_set_scan_power - Set Tx power for scan probe requests
1764  *
1765  * Set (in our channel info database) the direct scan Tx power for 1 Mbit (CCK)
1766  * or 6 Mbit (OFDM) rates.
1767  */
1768 static void iwl3945_hw_reg_set_scan_power(struct iwl3945_priv *priv, u32 scan_tbl_index,
1769                                s32 rate_index, const s8 *clip_pwrs,
1770                                struct iwl3945_channel_info *ch_info,
1771                                int band_index)
1772 {
1773         struct iwl3945_scan_power_info *scan_power_info;
1774         s8 power;
1775         u8 power_index;
1776
1777         scan_power_info = &ch_info->scan_pwr_info[scan_tbl_index];
1778
1779         /* use this channel group's 6Mbit clipping/saturation pwr,
1780          *   but cap at regulatory scan power restriction (set during init
1781          *   based on eeprom channel data) for this channel.  */
1782         power = min(ch_info->scan_power, clip_pwrs[IWL_RATE_6M_INDEX_TABLE]);
1783
1784         /* further limit to user's max power preference.
1785          * FIXME:  Other spectrum management power limitations do not
1786          *   seem to apply?? */
1787         power = min(power, priv->user_txpower_limit);
1788         scan_power_info->requested_power = power;
1789
1790         /* find difference between new scan *power* and current "normal"
1791          *   Tx *power* for 6Mb.  Use this difference (x2) to adjust the
1792          *   current "normal" temperature-compensated Tx power *index* for
1793          *   this rate (1Mb or 6Mb) to yield new temp-compensated scan power
1794          *   *index*. */
1795         power_index = ch_info->power_info[rate_index].power_table_index
1796             - (power - ch_info->power_info
1797                [IWL_RATE_6M_INDEX_TABLE].requested_power) * 2;
1798
1799         /* store reference index that we use when adjusting *all* scan
1800          *   powers.  So we can accommodate user (all channel) or spectrum
1801          *   management (single channel) power changes "between" temperature
1802          *   feedback compensation procedures.
1803          * don't force fit this reference index into gain table; it may be a
1804          *   negative number.  This will help avoid errors when we're at
1805          *   the lower bounds (highest gains, for warmest temperatures)
1806          *   of the table. */
1807
1808         /* don't exceed table bounds for "real" setting */
1809         power_index = iwl3945_hw_reg_fix_power_index(power_index);
1810
1811         scan_power_info->power_table_index = power_index;
1812         scan_power_info->tpc.tx_gain =
1813             power_gain_table[band_index][power_index].tx_gain;
1814         scan_power_info->tpc.dsp_atten =
1815             power_gain_table[band_index][power_index].dsp_atten;
1816 }
1817
1818 /**
1819  * iwl3945_hw_reg_send_txpower - fill in Tx Power command with gain settings
1820  *
1821  * Configures power settings for all rates for the current channel,
1822  * using values from channel info struct, and send to NIC
1823  */
1824 int iwl3945_hw_reg_send_txpower(struct iwl3945_priv *priv)
1825 {
1826         int rate_idx, i;
1827         const struct iwl3945_channel_info *ch_info = NULL;
1828         struct iwl3945_txpowertable_cmd txpower = {
1829                 .channel = priv->active_rxon.channel,
1830         };
1831
1832         txpower.band = (priv->band == IEEE80211_BAND_5GHZ) ? 0 : 1;
1833         ch_info = iwl3945_get_channel_info(priv,
1834                                        priv->band,
1835                                        le16_to_cpu(priv->active_rxon.channel));
1836         if (!ch_info) {
1837                 IWL_ERROR
1838                     ("Failed to get channel info for channel %d [%d]\n",
1839                      le16_to_cpu(priv->active_rxon.channel), priv->band);
1840                 return -EINVAL;
1841         }
1842
1843         if (!is_channel_valid(ch_info)) {
1844                 IWL_DEBUG_POWER("Not calling TX_PWR_TABLE_CMD on "
1845                                 "non-Tx channel.\n");
1846                 return 0;
1847         }
1848
1849         /* fill cmd with power settings for all rates for current channel */
1850         /* Fill OFDM rate */
1851         for (rate_idx = IWL_FIRST_OFDM_RATE, i = 0;
1852              rate_idx <= IWL_LAST_OFDM_RATE; rate_idx++, i++) {
1853
1854                 txpower.power[i].tpc = ch_info->power_info[i].tpc;
1855                 txpower.power[i].rate = iwl3945_rates[rate_idx].plcp;
1856
1857                 IWL_DEBUG_POWER("ch %d:%d rf %d dsp %3d rate code 0x%02x\n",
1858                                 le16_to_cpu(txpower.channel),
1859                                 txpower.band,
1860                                 txpower.power[i].tpc.tx_gain,
1861                                 txpower.power[i].tpc.dsp_atten,
1862                                 txpower.power[i].rate);
1863         }
1864         /* Fill CCK rates */
1865         for (rate_idx = IWL_FIRST_CCK_RATE;
1866              rate_idx <= IWL_LAST_CCK_RATE; rate_idx++, i++) {
1867                 txpower.power[i].tpc = ch_info->power_info[i].tpc;
1868                 txpower.power[i].rate = iwl3945_rates[rate_idx].plcp;
1869
1870                 IWL_DEBUG_POWER("ch %d:%d rf %d dsp %3d rate code 0x%02x\n",
1871                                 le16_to_cpu(txpower.channel),
1872                                 txpower.band,
1873                                 txpower.power[i].tpc.tx_gain,
1874                                 txpower.power[i].tpc.dsp_atten,
1875                                 txpower.power[i].rate);
1876         }
1877
1878         return iwl3945_send_cmd_pdu(priv, REPLY_TX_PWR_TABLE_CMD,
1879                         sizeof(struct iwl3945_txpowertable_cmd), &txpower);
1880
1881 }
1882
1883 /**
1884  * iwl3945_hw_reg_set_new_power - Configures power tables at new levels
1885  * @ch_info: Channel to update.  Uses power_info.requested_power.
1886  *
1887  * Replace requested_power and base_power_index ch_info fields for
1888  * one channel.
1889  *
1890  * Called if user or spectrum management changes power preferences.
1891  * Takes into account h/w and modulation limitations (clip power).
1892  *
1893  * This does *not* send anything to NIC, just sets up ch_info for one channel.
1894  *
1895  * NOTE: reg_compensate_for_temperature_dif() *must* be run after this to
1896  *       properly fill out the scan powers, and actual h/w gain settings,
1897  *       and send changes to NIC
1898  */
1899 static int iwl3945_hw_reg_set_new_power(struct iwl3945_priv *priv,
1900                              struct iwl3945_channel_info *ch_info)
1901 {
1902         struct iwl3945_channel_power_info *power_info;
1903         int power_changed = 0;
1904         int i;
1905         const s8 *clip_pwrs;
1906         int power;
1907
1908         /* Get this chnlgrp's rate-to-max/clip-powers table */
1909         clip_pwrs = priv->clip_groups[ch_info->group_index].clip_powers;
1910
1911         /* Get this channel's rate-to-current-power settings table */
1912         power_info = ch_info->power_info;
1913
1914         /* update OFDM Txpower settings */
1915         for (i = IWL_RATE_6M_INDEX_TABLE; i <= IWL_RATE_54M_INDEX_TABLE;
1916              i++, ++power_info) {
1917                 int delta_idx;
1918
1919                 /* limit new power to be no more than h/w capability */
1920                 power = min(ch_info->curr_txpow, clip_pwrs[i]);
1921                 if (power == power_info->requested_power)
1922                         continue;
1923
1924                 /* find difference between old and new requested powers,
1925                  *    update base (non-temp-compensated) power index */
1926                 delta_idx = (power - power_info->requested_power) * 2;
1927                 power_info->base_power_index -= delta_idx;
1928
1929                 /* save new requested power value */
1930                 power_info->requested_power = power;
1931
1932                 power_changed = 1;
1933         }
1934
1935         /* update CCK Txpower settings, based on OFDM 12M setting ...
1936          *    ... all CCK power settings for a given channel are the *same*. */
1937         if (power_changed) {
1938                 power =
1939                     ch_info->power_info[IWL_RATE_12M_INDEX_TABLE].
1940                     requested_power + IWL_CCK_FROM_OFDM_POWER_DIFF;
1941
1942                 /* do all CCK rates' iwl3945_channel_power_info structures */
1943                 for (i = IWL_RATE_1M_INDEX_TABLE; i <= IWL_RATE_11M_INDEX_TABLE; i++) {
1944                         power_info->requested_power = power;
1945                         power_info->base_power_index =
1946                             ch_info->power_info[IWL_RATE_12M_INDEX_TABLE].
1947                             base_power_index + IWL_CCK_FROM_OFDM_INDEX_DIFF;
1948                         ++power_info;
1949                 }
1950         }
1951
1952         return 0;
1953 }
1954
1955 /**
1956  * iwl3945_hw_reg_get_ch_txpower_limit - returns new power limit for channel
1957  *
1958  * NOTE: Returned power limit may be less (but not more) than requested,
1959  *       based strictly on regulatory (eeprom and spectrum mgt) limitations
1960  *       (no consideration for h/w clipping limitations).
1961  */
1962 static int iwl3945_hw_reg_get_ch_txpower_limit(struct iwl3945_channel_info *ch_info)
1963 {
1964         s8 max_power;
1965
1966 #if 0
1967         /* if we're using TGd limits, use lower of TGd or EEPROM */
1968         if (ch_info->tgd_data.max_power != 0)
1969                 max_power = min(ch_info->tgd_data.max_power,
1970                                 ch_info->eeprom.max_power_avg);
1971
1972         /* else just use EEPROM limits */
1973         else
1974 #endif
1975                 max_power = ch_info->eeprom.max_power_avg;
1976
1977         return min(max_power, ch_info->max_power_avg);
1978 }
1979
1980 /**
1981  * iwl3945_hw_reg_comp_txpower_temp - Compensate for temperature
1982  *
1983  * Compensate txpower settings of *all* channels for temperature.
1984  * This only accounts for the difference between current temperature
1985  *   and the factory calibration temperatures, and bases the new settings
1986  *   on the channel's base_power_index.
1987  *
1988  * If RxOn is "associated", this sends the new Txpower to NIC!
1989  */
1990 static int iwl3945_hw_reg_comp_txpower_temp(struct iwl3945_priv *priv)
1991 {
1992         struct iwl3945_channel_info *ch_info = NULL;
1993         int delta_index;
1994         const s8 *clip_pwrs; /* array of h/w max power levels for each rate */
1995         u8 a_band;
1996         u8 rate_index;
1997         u8 scan_tbl_index;
1998         u8 i;
1999         int ref_temp;
2000         int temperature = priv->temperature;
2001
2002         /* set up new Tx power info for each and every channel, 2.4 and 5.x */
2003         for (i = 0; i < priv->channel_count; i++) {
2004                 ch_info = &priv->channel_info[i];
2005                 a_band = is_channel_a_band(ch_info);
2006
2007                 /* Get this chnlgrp's factory calibration temperature */
2008                 ref_temp = (s16)priv->eeprom.groups[ch_info->group_index].
2009                     temperature;
2010
2011                 /* get power index adjustment based on curr and factory
2012                  * temps */
2013                 delta_index = iwl3945_hw_reg_adjust_power_by_temp(temperature,
2014                                                               ref_temp);
2015
2016                 /* set tx power value for all rates, OFDM and CCK */
2017                 for (rate_index = 0; rate_index < IWL_RATE_COUNT;
2018                      rate_index++) {
2019                         int power_idx =
2020                             ch_info->power_info[rate_index].base_power_index;
2021
2022                         /* temperature compensate */
2023                         power_idx += delta_index;
2024
2025                         /* stay within table range */
2026                         power_idx = iwl3945_hw_reg_fix_power_index(power_idx);
2027                         ch_info->power_info[rate_index].
2028                             power_table_index = (u8) power_idx;
2029                         ch_info->power_info[rate_index].tpc =
2030                             power_gain_table[a_band][power_idx];
2031                 }
2032
2033                 /* Get this chnlgrp's rate-to-max/clip-powers table */
2034                 clip_pwrs = priv->clip_groups[ch_info->group_index].clip_powers;
2035
2036                 /* set scan tx power, 1Mbit for CCK, 6Mbit for OFDM */
2037                 for (scan_tbl_index = 0;
2038                      scan_tbl_index < IWL_NUM_SCAN_RATES; scan_tbl_index++) {
2039                         s32 actual_index = (scan_tbl_index == 0) ?
2040                             IWL_RATE_1M_INDEX_TABLE : IWL_RATE_6M_INDEX_TABLE;
2041                         iwl3945_hw_reg_set_scan_power(priv, scan_tbl_index,
2042                                            actual_index, clip_pwrs,
2043                                            ch_info, a_band);
2044                 }
2045         }
2046
2047         /* send Txpower command for current channel to ucode */
2048         return iwl3945_hw_reg_send_txpower(priv);
2049 }
2050
2051 int iwl3945_hw_reg_set_txpower(struct iwl3945_priv *priv, s8 power)
2052 {
2053         struct iwl3945_channel_info *ch_info;
2054         s8 max_power;
2055         u8 a_band;
2056         u8 i;
2057
2058         if (priv->user_txpower_limit == power) {
2059                 IWL_DEBUG_POWER("Requested Tx power same as current "
2060                                 "limit: %ddBm.\n", power);
2061                 return 0;
2062         }
2063
2064         IWL_DEBUG_POWER("Setting upper limit clamp to %ddBm.\n", power);
2065         priv->user_txpower_limit = power;
2066
2067         /* set up new Tx powers for each and every channel, 2.4 and 5.x */
2068
2069         for (i = 0; i < priv->channel_count; i++) {
2070                 ch_info = &priv->channel_info[i];
2071                 a_band = is_channel_a_band(ch_info);
2072
2073                 /* find minimum power of all user and regulatory constraints
2074                  *    (does not consider h/w clipping limitations) */
2075                 max_power = iwl3945_hw_reg_get_ch_txpower_limit(ch_info);
2076                 max_power = min(power, max_power);
2077                 if (max_power != ch_info->curr_txpow) {
2078                         ch_info->curr_txpow = max_power;
2079
2080                         /* this considers the h/w clipping limitations */
2081                         iwl3945_hw_reg_set_new_power(priv, ch_info);
2082                 }
2083         }
2084
2085         /* update txpower settings for all channels,
2086          *   send to NIC if associated. */
2087         is_temp_calib_needed(priv);
2088         iwl3945_hw_reg_comp_txpower_temp(priv);
2089
2090         return 0;
2091 }
2092
2093 /* will add 3945 channel switch cmd handling later */
2094 int iwl3945_hw_channel_switch(struct iwl3945_priv *priv, u16 channel)
2095 {
2096         return 0;
2097 }
2098
2099 /**
2100  * iwl3945_reg_txpower_periodic -  called when time to check our temperature.
2101  *
2102  * -- reset periodic timer
2103  * -- see if temp has changed enough to warrant re-calibration ... if so:
2104  *     -- correct coeffs for temp (can reset temp timer)
2105  *     -- save this temp as "last",
2106  *     -- send new set of gain settings to NIC
2107  * NOTE:  This should continue working, even when we're not associated,
2108  *   so we can keep our internal table of scan powers current. */
2109 void iwl3945_reg_txpower_periodic(struct iwl3945_priv *priv)
2110 {
2111         /* This will kick in the "brute force"
2112          * iwl3945_hw_reg_comp_txpower_temp() below */
2113         if (!is_temp_calib_needed(priv))
2114                 goto reschedule;
2115
2116         /* Set up a new set of temp-adjusted TxPowers, send to NIC.
2117          * This is based *only* on current temperature,
2118          * ignoring any previous power measurements */
2119         iwl3945_hw_reg_comp_txpower_temp(priv);
2120
2121  reschedule:
2122         queue_delayed_work(priv->workqueue,
2123                            &priv->thermal_periodic, REG_RECALIB_PERIOD * HZ);
2124 }
2125
2126 static void iwl3945_bg_reg_txpower_periodic(struct work_struct *work)
2127 {
2128         struct iwl3945_priv *priv = container_of(work, struct iwl3945_priv,
2129                                              thermal_periodic.work);
2130
2131         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2132                 return;
2133
2134         mutex_lock(&priv->mutex);
2135         iwl3945_reg_txpower_periodic(priv);
2136         mutex_unlock(&priv->mutex);
2137 }
2138
2139 /**
2140  * iwl3945_hw_reg_get_ch_grp_index - find the channel-group index (0-4)
2141  *                                 for the channel.
2142  *
2143  * This function is used when initializing channel-info structs.
2144  *
2145  * NOTE: These channel groups do *NOT* match the bands above!
2146  *       These channel groups are based on factory-tested channels;
2147  *       on A-band, EEPROM's "group frequency" entries represent the top
2148  *       channel in each group 1-4.  Group 5 All B/G channels are in group 0.
2149  */
2150 static u16 iwl3945_hw_reg_get_ch_grp_index(struct iwl3945_priv *priv,
2151                                        const struct iwl3945_channel_info *ch_info)
2152 {
2153         struct iwl3945_eeprom_txpower_group *ch_grp = &priv->eeprom.groups[0];
2154         u8 group;
2155         u16 group_index = 0;    /* based on factory calib frequencies */
2156         u8 grp_channel;
2157
2158         /* Find the group index for the channel ... don't use index 1(?) */
2159         if (is_channel_a_band(ch_info)) {
2160                 for (group = 1; group < 5; group++) {
2161                         grp_channel = ch_grp[group].group_channel;
2162                         if (ch_info->channel <= grp_channel) {
2163                                 group_index = group;
2164                                 break;
2165                         }
2166                 }
2167                 /* group 4 has a few channels *above* its factory cal freq */
2168                 if (group == 5)
2169                         group_index = 4;
2170         } else
2171                 group_index = 0;        /* 2.4 GHz, group 0 */
2172
2173         IWL_DEBUG_POWER("Chnl %d mapped to grp %d\n", ch_info->channel,
2174                         group_index);
2175         return group_index;
2176 }
2177
2178 /**
2179  * iwl3945_hw_reg_get_matched_power_index - Interpolate to get nominal index
2180  *
2181  * Interpolate to get nominal (i.e. at factory calibration temperature) index
2182  *   into radio/DSP gain settings table for requested power.
2183  */
2184 static int iwl3945_hw_reg_get_matched_power_index(struct iwl3945_priv *priv,
2185                                        s8 requested_power,
2186                                        s32 setting_index, s32 *new_index)
2187 {
2188         const struct iwl3945_eeprom_txpower_group *chnl_grp = NULL;
2189         s32 index0, index1;
2190         s32 power = 2 * requested_power;
2191         s32 i;
2192         const struct iwl3945_eeprom_txpower_sample *samples;
2193         s32 gains0, gains1;
2194         s32 res;
2195         s32 denominator;
2196
2197         chnl_grp = &priv->eeprom.groups[setting_index];
2198         samples = chnl_grp->samples;
2199         for (i = 0; i < 5; i++) {
2200                 if (power == samples[i].power) {
2201                         *new_index = samples[i].gain_index;
2202                         return 0;
2203                 }
2204         }
2205
2206         if (power > samples[1].power) {
2207                 index0 = 0;
2208                 index1 = 1;
2209         } else if (power > samples[2].power) {
2210                 index0 = 1;
2211                 index1 = 2;
2212         } else if (power > samples[3].power) {
2213                 index0 = 2;
2214                 index1 = 3;
2215         } else {
2216                 index0 = 3;
2217                 index1 = 4;
2218         }
2219
2220         denominator = (s32) samples[index1].power - (s32) samples[index0].power;
2221         if (denominator == 0)
2222                 return -EINVAL;
2223         gains0 = (s32) samples[index0].gain_index * (1 << 19);
2224         gains1 = (s32) samples[index1].gain_index * (1 << 19);
2225         res = gains0 + (gains1 - gains0) *
2226             ((s32) power - (s32) samples[index0].power) / denominator +
2227             (1 << 18);
2228         *new_index = res >> 19;
2229         return 0;
2230 }
2231
2232 static void iwl3945_hw_reg_init_channel_groups(struct iwl3945_priv *priv)
2233 {
2234         u32 i;
2235         s32 rate_index;
2236         const struct iwl3945_eeprom_txpower_group *group;
2237
2238         IWL_DEBUG_POWER("Initializing factory calib info from EEPROM\n");
2239
2240         for (i = 0; i < IWL_NUM_TX_CALIB_GROUPS; i++) {
2241                 s8 *clip_pwrs;  /* table of power levels for each rate */
2242                 s8 satur_pwr;   /* saturation power for each chnl group */
2243                 group = &priv->eeprom.groups[i];
2244
2245                 /* sanity check on factory saturation power value */
2246                 if (group->saturation_power < 40) {
2247                         IWL_WARNING("Error: saturation power is %d, "
2248                                     "less than minimum expected 40\n",
2249                                     group->saturation_power);
2250                         return;
2251                 }
2252
2253                 /*
2254                  * Derive requested power levels for each rate, based on
2255                  *   hardware capabilities (saturation power for band).
2256                  * Basic value is 3dB down from saturation, with further
2257                  *   power reductions for highest 3 data rates.  These
2258                  *   backoffs provide headroom for high rate modulation
2259                  *   power peaks, without too much distortion (clipping).
2260                  */
2261                 /* we'll fill in this array with h/w max power levels */
2262                 clip_pwrs = (s8 *) priv->clip_groups[i].clip_powers;
2263
2264                 /* divide factory saturation power by 2 to find -3dB level */
2265                 satur_pwr = (s8) (group->saturation_power >> 1);
2266
2267                 /* fill in channel group's nominal powers for each rate */
2268                 for (rate_index = 0;
2269                      rate_index < IWL_RATE_COUNT; rate_index++, clip_pwrs++) {
2270                         switch (rate_index) {
2271                         case IWL_RATE_36M_INDEX_TABLE:
2272                                 if (i == 0)     /* B/G */
2273                                         *clip_pwrs = satur_pwr;
2274                                 else    /* A */
2275                                         *clip_pwrs = satur_pwr - 5;
2276                                 break;
2277                         case IWL_RATE_48M_INDEX_TABLE:
2278                                 if (i == 0)
2279                                         *clip_pwrs = satur_pwr - 7;
2280                                 else
2281                                         *clip_pwrs = satur_pwr - 10;
2282                                 break;
2283                         case IWL_RATE_54M_INDEX_TABLE:
2284                                 if (i == 0)
2285                                         *clip_pwrs = satur_pwr - 9;
2286                                 else
2287                                         *clip_pwrs = satur_pwr - 12;
2288                                 break;
2289                         default:
2290                                 *clip_pwrs = satur_pwr;
2291                                 break;
2292                         }
2293                 }
2294         }
2295 }
2296
2297 /**
2298  * iwl3945_txpower_set_from_eeprom - Set channel power info based on EEPROM
2299  *
2300  * Second pass (during init) to set up priv->channel_info
2301  *
2302  * Set up Tx-power settings in our channel info database for each VALID
2303  * (for this geo/SKU) channel, at all Tx data rates, based on eeprom values
2304  * and current temperature.
2305  *
2306  * Since this is based on current temperature (at init time), these values may
2307  * not be valid for very long, but it gives us a starting/default point,
2308  * and allows us to active (i.e. using Tx) scan.
2309  *
2310  * This does *not* write values to NIC, just sets up our internal table.
2311  */
2312 int iwl3945_txpower_set_from_eeprom(struct iwl3945_priv *priv)
2313 {
2314         struct iwl3945_channel_info *ch_info = NULL;
2315         struct iwl3945_channel_power_info *pwr_info;
2316         int delta_index;
2317         u8 rate_index;
2318         u8 scan_tbl_index;
2319         const s8 *clip_pwrs;    /* array of power levels for each rate */
2320         u8 gain, dsp_atten;
2321         s8 power;
2322         u8 pwr_index, base_pwr_index, a_band;
2323         u8 i;
2324         int temperature;
2325
2326         /* save temperature reference,
2327          *   so we can determine next time to calibrate */
2328         temperature = iwl3945_hw_reg_txpower_get_temperature(priv);
2329         priv->last_temperature = temperature;
2330
2331         iwl3945_hw_reg_init_channel_groups(priv);
2332
2333         /* initialize Tx power info for each and every channel, 2.4 and 5.x */
2334         for (i = 0, ch_info = priv->channel_info; i < priv->channel_count;
2335              i++, ch_info++) {
2336                 a_band = is_channel_a_band(ch_info);
2337                 if (!is_channel_valid(ch_info))
2338                         continue;
2339
2340                 /* find this channel's channel group (*not* "band") index */
2341                 ch_info->group_index =
2342                         iwl3945_hw_reg_get_ch_grp_index(priv, ch_info);
2343
2344                 /* Get this chnlgrp's rate->max/clip-powers table */
2345                 clip_pwrs = priv->clip_groups[ch_info->group_index].clip_powers;
2346
2347                 /* calculate power index *adjustment* value according to
2348                  *  diff between current temperature and factory temperature */
2349                 delta_index = iwl3945_hw_reg_adjust_power_by_temp(temperature,
2350                                 priv->eeprom.groups[ch_info->group_index].
2351                                 temperature);
2352
2353                 IWL_DEBUG_POWER("Delta index for channel %d: %d [%d]\n",
2354                                 ch_info->channel, delta_index, temperature +
2355                                 IWL_TEMP_CONVERT);
2356
2357                 /* set tx power value for all OFDM rates */
2358                 for (rate_index = 0; rate_index < IWL_OFDM_RATES;
2359                      rate_index++) {
2360                         s32 power_idx;
2361                         int rc;
2362
2363                         /* use channel group's clip-power table,
2364                          *   but don't exceed channel's max power */
2365                         s8 pwr = min(ch_info->max_power_avg,
2366                                      clip_pwrs[rate_index]);
2367
2368                         pwr_info = &ch_info->power_info[rate_index];
2369
2370                         /* get base (i.e. at factory-measured temperature)
2371                          *    power table index for this rate's power */
2372                         rc = iwl3945_hw_reg_get_matched_power_index(priv, pwr,
2373                                                          ch_info->group_index,
2374                                                          &power_idx);
2375                         if (rc) {
2376                                 IWL_ERROR("Invalid power index\n");
2377                                 return rc;
2378                         }
2379                         pwr_info->base_power_index = (u8) power_idx;
2380
2381                         /* temperature compensate */
2382                         power_idx += delta_index;
2383
2384                         /* stay within range of gain table */
2385                         power_idx = iwl3945_hw_reg_fix_power_index(power_idx);
2386
2387                         /* fill 1 OFDM rate's iwl3945_channel_power_info struct */
2388                         pwr_info->requested_power = pwr;
2389                         pwr_info->power_table_index = (u8) power_idx;
2390                         pwr_info->tpc.tx_gain =
2391                             power_gain_table[a_band][power_idx].tx_gain;
2392                         pwr_info->tpc.dsp_atten =
2393                             power_gain_table[a_band][power_idx].dsp_atten;
2394                 }
2395
2396                 /* set tx power for CCK rates, based on OFDM 12 Mbit settings*/
2397                 pwr_info = &ch_info->power_info[IWL_RATE_12M_INDEX_TABLE];
2398                 power = pwr_info->requested_power +
2399                         IWL_CCK_FROM_OFDM_POWER_DIFF;
2400                 pwr_index = pwr_info->power_table_index +
2401                         IWL_CCK_FROM_OFDM_INDEX_DIFF;
2402                 base_pwr_index = pwr_info->base_power_index +
2403                         IWL_CCK_FROM_OFDM_INDEX_DIFF;
2404
2405                 /* stay within table range */
2406                 pwr_index = iwl3945_hw_reg_fix_power_index(pwr_index);
2407                 gain = power_gain_table[a_band][pwr_index].tx_gain;
2408                 dsp_atten = power_gain_table[a_band][pwr_index].dsp_atten;
2409
2410                 /* fill each CCK rate's iwl3945_channel_power_info structure
2411                  * NOTE:  All CCK-rate Txpwrs are the same for a given chnl!
2412                  * NOTE:  CCK rates start at end of OFDM rates! */
2413                 for (rate_index = 0;
2414                      rate_index < IWL_CCK_RATES; rate_index++) {
2415                         pwr_info = &ch_info->power_info[rate_index+IWL_OFDM_RATES];
2416                         pwr_info->requested_power = power;
2417                         pwr_info->power_table_index = pwr_index;
2418                         pwr_info->base_power_index = base_pwr_index;
2419                         pwr_info->tpc.tx_gain = gain;
2420                         pwr_info->tpc.dsp_atten = dsp_atten;
2421                 }
2422
2423                 /* set scan tx power, 1Mbit for CCK, 6Mbit for OFDM */
2424                 for (scan_tbl_index = 0;
2425                      scan_tbl_index < IWL_NUM_SCAN_RATES; scan_tbl_index++) {
2426                         s32 actual_index = (scan_tbl_index == 0) ?
2427                                 IWL_RATE_1M_INDEX_TABLE : IWL_RATE_6M_INDEX_TABLE;
2428                         iwl3945_hw_reg_set_scan_power(priv, scan_tbl_index,
2429                                 actual_index, clip_pwrs, ch_info, a_band);
2430                 }
2431         }
2432
2433         return 0;
2434 }
2435
2436 int iwl3945_hw_rxq_stop(struct iwl3945_priv *priv)
2437 {
2438         int rc;
2439         unsigned long flags;
2440
2441         spin_lock_irqsave(&priv->lock, flags);
2442         rc = iwl3945_grab_nic_access(priv);
2443         if (rc) {
2444                 spin_unlock_irqrestore(&priv->lock, flags);
2445                 return rc;
2446         }
2447
2448         iwl3945_write_direct32(priv, FH_RCSR_CONFIG(0), 0);
2449         rc = iwl3945_poll_direct_bit(priv, FH_RSSR_STATUS, (1 << 24), 1000);
2450         if (rc < 0)
2451                 IWL_ERROR("Can't stop Rx DMA.\n");
2452
2453         iwl3945_release_nic_access(priv);
2454         spin_unlock_irqrestore(&priv->lock, flags);
2455
2456         return 0;
2457 }
2458
2459 int iwl3945_hw_tx_queue_init(struct iwl3945_priv *priv, struct iwl3945_tx_queue *txq)
2460 {
2461         int rc;
2462         unsigned long flags;
2463         int txq_id = txq->q.id;
2464
2465         struct iwl3945_shared *shared_data = priv->hw_setting.shared_virt;
2466
2467         shared_data->tx_base_ptr[txq_id] = cpu_to_le32((u32)txq->q.dma_addr);
2468
2469         spin_lock_irqsave(&priv->lock, flags);
2470         rc = iwl3945_grab_nic_access(priv);
2471         if (rc) {
2472                 spin_unlock_irqrestore(&priv->lock, flags);
2473                 return rc;
2474         }
2475         iwl3945_write_direct32(priv, FH_CBCC_CTRL(txq_id), 0);
2476         iwl3945_write_direct32(priv, FH_CBCC_BASE(txq_id), 0);
2477
2478         iwl3945_write_direct32(priv, FH_TCSR_CONFIG(txq_id),
2479                 ALM_FH_TCSR_TX_CONFIG_REG_VAL_CIRQ_RTC_NOINT |
2480                 ALM_FH_TCSR_TX_CONFIG_REG_VAL_MSG_MODE_TXF |
2481                 ALM_FH_TCSR_TX_CONFIG_REG_VAL_CIRQ_HOST_IFTFD |
2482                 ALM_FH_TCSR_TX_CONFIG_REG_VAL_DMA_CREDIT_ENABLE_VAL |
2483                 ALM_FH_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_ENABLE);
2484         iwl3945_release_nic_access(priv);
2485
2486         /* fake read to flush all prev. writes */
2487         iwl3945_read32(priv, FH_TSSR_CBB_BASE);
2488         spin_unlock_irqrestore(&priv->lock, flags);
2489
2490         return 0;
2491 }
2492
2493 int iwl3945_hw_get_rx_read(struct iwl3945_priv *priv)
2494 {
2495         struct iwl3945_shared *shared_data = priv->hw_setting.shared_virt;
2496
2497         return le32_to_cpu(shared_data->rx_read_ptr[0]);
2498 }
2499
2500 /**
2501  * iwl3945_init_hw_rate_table - Initialize the hardware rate fallback table
2502  */
2503 int iwl3945_init_hw_rate_table(struct iwl3945_priv *priv)
2504 {
2505         int rc, i, index, prev_index;
2506         struct iwl3945_rate_scaling_cmd rate_cmd = {
2507                 .reserved = {0, 0, 0},
2508         };
2509         struct iwl3945_rate_scaling_info *table = rate_cmd.table;
2510
2511         for (i = 0; i < ARRAY_SIZE(iwl3945_rates); i++) {
2512                 index = iwl3945_rates[i].table_rs_index;
2513
2514                 table[index].rate_n_flags =
2515                         iwl3945_hw_set_rate_n_flags(iwl3945_rates[i].plcp, 0);
2516                 table[index].try_cnt = priv->retry_rate;
2517                 prev_index = iwl3945_get_prev_ieee_rate(i);
2518                 table[index].next_rate_index = iwl3945_rates[prev_index].table_rs_index;
2519         }
2520
2521         switch (priv->band) {
2522         case IEEE80211_BAND_5GHZ:
2523                 IWL_DEBUG_RATE("Select A mode rate scale\n");
2524                 /* If one of the following CCK rates is used,
2525                  * have it fall back to the 6M OFDM rate */
2526                 for (i = IWL_RATE_1M_INDEX_TABLE; i <= IWL_RATE_11M_INDEX_TABLE; i++)
2527                         table[i].next_rate_index = iwl3945_rates[IWL_FIRST_OFDM_RATE].table_rs_index;
2528
2529                 /* Don't fall back to CCK rates */
2530                 table[IWL_RATE_12M_INDEX_TABLE].next_rate_index = IWL_RATE_9M_INDEX_TABLE;
2531
2532                 /* Don't drop out of OFDM rates */
2533                 table[IWL_RATE_6M_INDEX_TABLE].next_rate_index =
2534                     iwl3945_rates[IWL_FIRST_OFDM_RATE].table_rs_index;
2535                 break;
2536
2537         case IEEE80211_BAND_2GHZ:
2538                 IWL_DEBUG_RATE("Select B/G mode rate scale\n");
2539                 /* If an OFDM rate is used, have it fall back to the
2540                  * 1M CCK rates */
2541                 for (i = IWL_RATE_6M_INDEX_TABLE; i <= IWL_RATE_54M_INDEX_TABLE; i++)
2542                         table[i].next_rate_index = iwl3945_rates[IWL_FIRST_CCK_RATE].table_rs_index;
2543
2544                 /* CCK shouldn't fall back to OFDM... */
2545                 table[IWL_RATE_11M_INDEX_TABLE].next_rate_index = IWL_RATE_5M_INDEX_TABLE;
2546                 break;
2547
2548         default:
2549                 WARN_ON(1);
2550                 break;
2551         }
2552
2553         /* Update the rate scaling for control frame Tx */
2554         rate_cmd.table_id = 0;
2555         rc = iwl3945_send_cmd_pdu(priv, REPLY_RATE_SCALE, sizeof(rate_cmd),
2556                               &rate_cmd);
2557         if (rc)
2558                 return rc;
2559
2560         /* Update the rate scaling for data frame Tx */
2561         rate_cmd.table_id = 1;
2562         return iwl3945_send_cmd_pdu(priv, REPLY_RATE_SCALE, sizeof(rate_cmd),
2563                                 &rate_cmd);
2564 }
2565
2566 /* Called when initializing driver */
2567 int iwl3945_hw_set_hw_setting(struct iwl3945_priv *priv)
2568 {
2569         memset((void *)&priv->hw_setting, 0,
2570                sizeof(struct iwl3945_driver_hw_info));
2571
2572         priv->hw_setting.shared_virt =
2573             pci_alloc_consistent(priv->pci_dev,
2574                                  sizeof(struct iwl3945_shared),
2575                                  &priv->hw_setting.shared_phys);
2576
2577         if (!priv->hw_setting.shared_virt) {
2578                 IWL_ERROR("failed to allocate pci memory\n");
2579                 mutex_unlock(&priv->mutex);
2580                 return -ENOMEM;
2581         }
2582
2583         priv->hw_setting.rx_buf_size = IWL_RX_BUF_SIZE;
2584         priv->hw_setting.max_pkt_size = 2342;
2585         priv->hw_setting.tx_cmd_len = sizeof(struct iwl3945_tx_cmd);
2586         priv->hw_setting.max_rxq_size = RX_QUEUE_SIZE;
2587         priv->hw_setting.max_rxq_log = RX_QUEUE_SIZE_LOG;
2588         priv->hw_setting.max_stations = IWL3945_STATION_COUNT;
2589         priv->hw_setting.bcast_sta_id = IWL3945_BROADCAST_ID;
2590
2591         priv->hw_setting.tx_ant_num = 2;
2592         return 0;
2593 }
2594
2595 unsigned int iwl3945_hw_get_beacon_cmd(struct iwl3945_priv *priv,
2596                           struct iwl3945_frame *frame, u8 rate)
2597 {
2598         struct iwl3945_tx_beacon_cmd *tx_beacon_cmd;
2599         unsigned int frame_size;
2600
2601         tx_beacon_cmd = (struct iwl3945_tx_beacon_cmd *)&frame->u;
2602         memset(tx_beacon_cmd, 0, sizeof(*tx_beacon_cmd));
2603
2604         tx_beacon_cmd->tx.sta_id = priv->hw_setting.bcast_sta_id;
2605         tx_beacon_cmd->tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2606
2607         frame_size = iwl3945_fill_beacon_frame(priv,
2608                                 tx_beacon_cmd->frame,
2609                                 iwl3945_broadcast_addr,
2610                                 sizeof(frame->u) - sizeof(*tx_beacon_cmd));
2611
2612         BUG_ON(frame_size > MAX_MPDU_SIZE);
2613         tx_beacon_cmd->tx.len = cpu_to_le16((u16)frame_size);
2614
2615         tx_beacon_cmd->tx.rate = rate;
2616         tx_beacon_cmd->tx.tx_flags = (TX_CMD_FLG_SEQ_CTL_MSK |
2617                                       TX_CMD_FLG_TSF_MSK);
2618
2619         /* supp_rates[0] == OFDM start at IWL_FIRST_OFDM_RATE*/
2620         tx_beacon_cmd->tx.supp_rates[0] =
2621                 (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
2622
2623         tx_beacon_cmd->tx.supp_rates[1] =
2624                 (IWL_CCK_BASIC_RATES_MASK & 0xF);
2625
2626         return (sizeof(struct iwl3945_tx_beacon_cmd) + frame_size);
2627 }
2628
2629 void iwl3945_hw_rx_handler_setup(struct iwl3945_priv *priv)
2630 {
2631         priv->rx_handlers[REPLY_TX] = iwl3945_rx_reply_tx;
2632         priv->rx_handlers[REPLY_3945_RX] = iwl3945_rx_reply_rx;
2633 }
2634
2635 void iwl3945_hw_setup_deferred_work(struct iwl3945_priv *priv)
2636 {
2637         INIT_DELAYED_WORK(&priv->thermal_periodic,
2638                           iwl3945_bg_reg_txpower_periodic);
2639 }
2640
2641 void iwl3945_hw_cancel_deferred_work(struct iwl3945_priv *priv)
2642 {
2643         cancel_delayed_work(&priv->thermal_periodic);
2644 }
2645
2646 static struct iwl_3945_cfg iwl3945_bg_cfg = {
2647         .name = "3945BG",
2648         .fw_name = "iwlwifi-3945" IWL3945_UCODE_API ".ucode",
2649         .sku = IWL_SKU_G,
2650 };
2651
2652 static struct iwl_3945_cfg iwl3945_abg_cfg = {
2653         .name = "3945ABG",
2654         .fw_name = "iwlwifi-3945" IWL3945_UCODE_API ".ucode",
2655         .sku = IWL_SKU_A|IWL_SKU_G,
2656 };
2657
2658 struct pci_device_id iwl3945_hw_card_ids[] = {
2659         {IWL_PCI_DEVICE(0x4222, 0x1005, iwl3945_bg_cfg)},
2660         {IWL_PCI_DEVICE(0x4222, 0x1034, iwl3945_bg_cfg)},
2661         {IWL_PCI_DEVICE(0x4222, 0x1044, iwl3945_bg_cfg)},
2662         {IWL_PCI_DEVICE(0x4227, 0x1014, iwl3945_bg_cfg)},
2663         {IWL_PCI_DEVICE(0x4222, PCI_ANY_ID, iwl3945_abg_cfg)},
2664         {IWL_PCI_DEVICE(0x4227, PCI_ANY_ID, iwl3945_abg_cfg)},
2665         {0}
2666 };
2667
2668 MODULE_DEVICE_TABLE(pci, iwl3945_hw_card_ids);