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_le16(sizeof(*iwl3945_rt), &iwl3945_rt->rt_hdr.it_len);
 558
 559         /* Indicate all the fields we add to the radiotap header */
 560         put_unaligned_le32((1 << IEEE80211_RADIOTAP_TSFT) |
 561                            (1 << IEEE80211_RADIOTAP_FLAGS) |
 562                            (1 << IEEE80211_RADIOTAP_RATE) |
 563                            (1 << IEEE80211_RADIOTAP_CHANNEL) |
 564                            (1 << IEEE80211_RADIOTAP_DBM_ANTSIGNAL) |
 565                            (1 << IEEE80211_RADIOTAP_DBM_ANTNOISE) |
 566                            (1 << IEEE80211_RADIOTAP_ANTENNA),
 567                         &iwl3945_rt->rt_hdr.it_present);
 568
 569         /* Zero the flags, we'll add to them as we go */
 570         iwl3945_rt->rt_flags = 0;
 571
 572         put_unaligned_le64(tsf, &iwl3945_rt->rt_tsf);
 573
 574         iwl3945_rt->rt_dbmsignal = signal;
 575         iwl3945_rt->rt_dbmnoise = noise;
 576
 577         /* Convert the channel frequency and set the flags */
 578         put_unaligned_le16(stats->freq, &iwl3945_rt->rt_channelMHz);
 579         if (!(phy_flags_hw & RX_RES_PHY_FLAGS_BAND_24_MSK))
 580                 put_unaligned_le16(IEEE80211_CHAN_OFDM | IEEE80211_CHAN_5GHZ,
 581                               &iwl3945_rt->rt_chbitmask);
 582         else if (phy_flags_hw & RX_RES_PHY_FLAGS_MOD_CCK_MSK)
 583                 put_unaligned_le16(IEEE80211_CHAN_CCK | IEEE80211_CHAN_2GHZ,
 584                               &iwl3945_rt->rt_chbitmask);
 585         else    /* 802.11g */
 586                 put_unaligned_le16(IEEE80211_CHAN_OFDM | IEEE80211_CHAN_2GHZ,
 587                               &iwl3945_rt->rt_chbitmask);
 588
 589         if (rate == -1)
 590                 iwl3945_rt->rt_rate = 0;
 591         else
 592                 iwl3945_rt->rt_rate = iwl3945_rates[rate].ieee;
 593
 594         /* antenna number */
 595         antenna = phy_flags_hw & RX_RES_PHY_FLAGS_ANTENNA_MSK;
 596         iwl3945_rt->rt_antenna = le16_to_cpu(antenna) >> 4;
 597
 598         /* set the preamble flag if we have it */
 599         if (phy_flags_hw & RX_RES_PHY_FLAGS_SHORT_PREAMBLE_MSK)
 600                 iwl3945_rt->rt_flags |= IEEE80211_RADIOTAP_F_SHORTPRE;
 601
 602         stats->flag |= RX_FLAG_RADIOTAP;
 603 }
 604
 605 static void iwl3945_handle_data_packet(struct iwl3945_priv *priv, int is_data,
 606                                    struct iwl3945_rx_mem_buffer *rxb,
 607                                    struct ieee80211_rx_status *stats)
 608 {
 609         struct ieee80211_hdr *hdr;
 610         struct iwl3945_rx_packet *pkt = (struct iwl3945_rx_packet *)rxb->skb->data;
 611         struct iwl3945_rx_frame_hdr *rx_hdr = IWL_RX_HDR(pkt);
 612         struct iwl3945_rx_frame_end *rx_end = IWL_RX_END(pkt);
 613         short len = le16_to_cpu(rx_hdr->len);
 614
 615         /* We received data from the HW, so stop the watchdog */
 616         if (unlikely((len + IWL_RX_FRAME_SIZE) > skb_tailroom(rxb->skb))) {
 617                 IWL_DEBUG_DROP("Corruption detected!\n");
 618                 return;
 619         }
 620
 621         /* We only process data packets if the interface is open */
 622         if (unlikely(!priv->is_open)) {
 623                 IWL_DEBUG_DROP_LIMIT
 624                     ("Dropping packet while interface is not open.\n");
 625                 return;
 626         }
 627
 628         skb_reserve(rxb->skb, (void *)rx_hdr->payload - (void *)pkt);
 629         /* Set the size of the skb to the size of the frame */
 630         skb_put(rxb->skb, le16_to_cpu(rx_hdr->len));
 631
 632         hdr = (void *)rxb->skb->data;
 633
 634         if (iwl3945_param_hwcrypto)
 635                 iwl3945_set_decrypted_flag(priv, rxb->skb,
 636                                        le32_to_cpu(rx_end->status), stats);
 637
 638         if (priv->add_radiotap)
 639                 iwl3945_add_radiotap(priv, rxb->skb, rx_hdr, stats);
 640
 641 #ifdef CONFIG_IWL3945_LEDS
 642         if (is_data)
 643                 priv->rxtxpackets += len;
 644 #endif
 645         ieee80211_rx_irqsafe(priv->hw, rxb->skb, stats);
 646         rxb->skb = NULL;
 647 }
 648
 649 #define IWL_DELAY_NEXT_SCAN_AFTER_ASSOC (HZ*6)
 650
 651 static void iwl3945_rx_reply_rx(struct iwl3945_priv *priv,
 652                                 struct iwl3945_rx_mem_buffer *rxb)
 653 {
 654         struct ieee80211_hdr *header;
 655         struct ieee80211_rx_status rx_status;
 656         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
 657         struct iwl3945_rx_frame_stats *rx_stats = IWL_RX_STATS(pkt);
 658         struct iwl3945_rx_frame_hdr *rx_hdr = IWL_RX_HDR(pkt);
 659         struct iwl3945_rx_frame_end *rx_end = IWL_RX_END(pkt);
 660         int snr;
 661         u16 rx_stats_sig_avg = le16_to_cpu(rx_stats->sig_avg);
 662         u16 rx_stats_noise_diff = le16_to_cpu(rx_stats->noise_diff);
 663         u8 network_packet;
 664
 665         rx_status.antenna = 0;
 666         rx_status.flag = 0;
 667         rx_status.mactime = le64_to_cpu(rx_end->timestamp);
 668         rx_status.freq =
 669                 ieee80211_channel_to_frequency(le16_to_cpu(rx_hdr->channel));
 670         rx_status.band = (rx_hdr->phy_flags & RX_RES_PHY_FLAGS_BAND_24_MSK) ?
 671                                 IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ;
 672
 673         rx_status.rate_idx = iwl3945_hwrate_to_plcp_idx(rx_hdr->rate);
 674         if (rx_status.band == IEEE80211_BAND_5GHZ)
 675                 rx_status.rate_idx -= IWL_FIRST_OFDM_RATE;
 676
 677         if ((unlikely(rx_stats->phy_count > 20))) {
 678                 IWL_DEBUG_DROP
 679                     ("dsp size out of range [0,20]: "
 680                      "%d/n", rx_stats->phy_count);
 681                 return;
 682         }
 683
 684         if (!(rx_end->status & RX_RES_STATUS_NO_CRC32_ERROR)
 685             || !(rx_end->status & RX_RES_STATUS_NO_RXE_OVERFLOW)) {
 686                 IWL_DEBUG_RX("Bad CRC or FIFO: 0x%08X.\n", rx_end->status);
 687                 return;
 688         }
 689
 690         if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR) {
 691                 iwl3945_handle_data_packet(priv, 1, rxb, &rx_status);
 692                 return;
 693         }
 694
 695         /* Convert 3945's rssi indicator to dBm */
 696         rx_status.ssi = rx_stats->rssi - IWL_RSSI_OFFSET;
 697
 698         /* Set default noise value to -127 */
 699         if (priv->last_rx_noise == 0)
 700                 priv->last_rx_noise = IWL_NOISE_MEAS_NOT_AVAILABLE;
 701
 702         /* 3945 provides noise info for OFDM frames only.
 703          * sig_avg and noise_diff are measured by the 3945's digital signal
 704          *   processor (DSP), and indicate linear levels of signal level and
 705          *   distortion/noise within the packet preamble after
 706          *   automatic gain control (AGC).  sig_avg should stay fairly
 707          *   constant if the radio's AGC is working well.
 708          * Since these values are linear (not dB or dBm), linear
 709          *   signal-to-noise ratio (SNR) is (sig_avg / noise_diff).
 710          * Convert linear SNR to dB SNR, then subtract that from rssi dBm
 711          *   to obtain noise level in dBm.
 712          * Calculate rx_status.signal (quality indicator in %) based on SNR. */
 713         if (rx_stats_noise_diff) {
 714                 snr = rx_stats_sig_avg / rx_stats_noise_diff;
 715                 rx_status.noise = rx_status.ssi -
 716                                         iwl3945_calc_db_from_ratio(snr);
 717                 rx_status.signal = iwl3945_calc_sig_qual(rx_status.ssi,
 718                                                          rx_status.noise);
 719
 720         /* If noise info not available, calculate signal quality indicator (%)
 721          *   using just the dBm signal level. */
 722         } else {
 723                 rx_status.noise = priv->last_rx_noise;
 724                 rx_status.signal = iwl3945_calc_sig_qual(rx_status.ssi, 0);
 725         }
 726
 727
 728         IWL_DEBUG_STATS("Rssi %d noise %d qual %d sig_avg %d noise_diff %d\n",
 729                         rx_status.ssi, rx_status.noise, rx_status.signal,
 730                         rx_stats_sig_avg, rx_stats_noise_diff);
 731
 732         header = (struct ieee80211_hdr *)IWL_RX_DATA(pkt);
 733
 734         network_packet = iwl3945_is_network_packet(priv, header);
 735
 736         IWL_DEBUG_STATS_LIMIT("[%c] %d RSSI:%d Signal:%u, Noise:%u, Rate:%u\n",
 737                               network_packet ? '*' : ' ',
 738                               le16_to_cpu(rx_hdr->channel),
 739                               rx_status.ssi, rx_status.ssi,
 740                               rx_status.ssi, rx_status.rate_idx);
 741
 742 #ifdef CONFIG_IWL3945_DEBUG
 743         if (iwl3945_debug_level & (IWL_DL_RX))
 744                 /* Set "1" to report good data frames in groups of 100 */
 745                 iwl3945_dbg_report_frame(priv, pkt, header, 1);
 746 #endif
 747
 748         if (network_packet) {
 749                 priv->last_beacon_time = le32_to_cpu(rx_end->beacon_timestamp);
 750                 priv->last_tsf = le64_to_cpu(rx_end->timestamp);
 751                 priv->last_rx_rssi = rx_status.ssi;
 752                 priv->last_rx_noise = rx_status.noise;
 753         }
 754
 755         switch (le16_to_cpu(header->frame_control) & IEEE80211_FCTL_FTYPE) {
 756         case IEEE80211_FTYPE_MGMT:
 757                 switch (le16_to_cpu(header->frame_control) &
 758                         IEEE80211_FCTL_STYPE) {
 759                 case IEEE80211_STYPE_PROBE_RESP:
 760                 case IEEE80211_STYPE_BEACON:{
 761                                 /* If this is a beacon or probe response for
 762                                  * our network then cache the beacon
 763                                  * timestamp */
 764                                 if ((((priv->iw_mode == IEEE80211_IF_TYPE_STA)
 765                                       && !compare_ether_addr(header->addr2,
 766                                                              priv->bssid)) ||
 767                                      ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
 768                                       && !compare_ether_addr(header->addr3,
 769                                                              priv->bssid)))) {
 770                                         struct ieee80211_mgmt *mgmt =
 771                                             (struct ieee80211_mgmt *)header;
 772                                         __le32 *pos;
 773                                         pos =
 774                                             (__le32 *) & mgmt->u.beacon.
 775                                             timestamp;
 776                                         priv->timestamp0 = le32_to_cpu(pos[0]);
 777                                         priv->timestamp1 = le32_to_cpu(pos[1]);
 778                                         priv->beacon_int = le16_to_cpu(
 779                                             mgmt->u.beacon.beacon_int);
 780                                         if (priv->call_post_assoc_from_beacon &&
 781                                             (priv->iw_mode ==
 782                                                 IEEE80211_IF_TYPE_STA))
 783                                                 queue_work(priv->workqueue,
 784                                                     &priv->post_associate.work);
 785
 786                                         priv->call_post_assoc_from_beacon = 0;
 787                                 }
 788
 789                                 break;
 790                         }
 791
 792                 case IEEE80211_STYPE_ACTION:
 793                         /* TODO: Parse 802.11h frames for CSA... */
 794                         break;
 795
 796                         /*
 797                          * TODO: Use the new callback function from
 798                          * mac80211 instead of sniffing these packets.
 799                          */
 800                 case IEEE80211_STYPE_ASSOC_RESP:
 801                 case IEEE80211_STYPE_REASSOC_RESP:{
 802                                 struct ieee80211_mgmt *mgnt =
 803                                     (struct ieee80211_mgmt *)header;
 804
 805                                 /* We have just associated, give some
 806                                  * time for the 4-way handshake if
 807                                  * any. Don't start scan too early. */
 808                                 priv->next_scan_jiffies = jiffies +
 809                                         IWL_DELAY_NEXT_SCAN_AFTER_ASSOC;
 810
 811                                 priv->assoc_id = (~((1 << 15) | (1 << 14)) &
 812                                                   le16_to_cpu(mgnt->u.
 813                                                               assoc_resp.aid));
 814                                 priv->assoc_capability =
 815                                     le16_to_cpu(mgnt->u.assoc_resp.capab_info);
 816                                 if (priv->beacon_int)
 817                                         queue_work(priv->workqueue,
 818                                             &priv->post_associate.work);
 819                                 else
 820                                         priv->call_post_assoc_from_beacon = 1;
 821                                 break;
 822                         }
 823
 824                 case IEEE80211_STYPE_PROBE_REQ:{
 825                                 DECLARE_MAC_BUF(mac1);
 826                                 DECLARE_MAC_BUF(mac2);
 827                                 DECLARE_MAC_BUF(mac3);
 828                                 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
 829                                         IWL_DEBUG_DROP
 830                                             ("Dropping (non network): %s"
 831                                              ", %s, %s\n",
 832                                              print_mac(mac1, header->addr1),
 833                                              print_mac(mac2, header->addr2),
 834                                              print_mac(mac3, header->addr3));
 835                                 return;
 836                         }
 837                 }
 838
 839                 iwl3945_handle_data_packet(priv, 0, rxb, &rx_status);
 840                 break;
 841
 842         case IEEE80211_FTYPE_CTL:
 843                 break;
 844
 845         case IEEE80211_FTYPE_DATA: {
 846                 DECLARE_MAC_BUF(mac1);
 847                 DECLARE_MAC_BUF(mac2);
 848                 DECLARE_MAC_BUF(mac3);
 849
 850                 if (unlikely(iwl3945_is_duplicate_packet(priv, header)))
 851                         IWL_DEBUG_DROP("Dropping (dup): %s, %s, %s\n",
 852                                        print_mac(mac1, header->addr1),
 853                                        print_mac(mac2, header->addr2),
 854                                        print_mac(mac3, header->addr3));
 855                 else
 856                         iwl3945_handle_data_packet(priv, 1, rxb, &rx_status);
 857                 break;
 858         }
 859         }
 860 }
 861
 862 int iwl3945_hw_txq_attach_buf_to_tfd(struct iwl3945_priv *priv, void *ptr,
 863                                  dma_addr_t addr, u16 len)
 864 {
 865         int count;
 866         u32 pad;
 867         struct iwl3945_tfd_frame *tfd = (struct iwl3945_tfd_frame *)ptr;
 868
 869         count = TFD_CTL_COUNT_GET(le32_to_cpu(tfd->control_flags));
 870         pad = TFD_CTL_PAD_GET(le32_to_cpu(tfd->control_flags));
 871
 872         if ((count >= NUM_TFD_CHUNKS) || (count < 0)) {
 873                 IWL_ERROR("Error can not send more than %d chunks\n",
 874                           NUM_TFD_CHUNKS);
 875                 return -EINVAL;
 876         }
 877
 878         tfd->pa[count].addr = cpu_to_le32(addr);
 879         tfd->pa[count].len = cpu_to_le32(len);
 880
 881         count++;
 882
 883         tfd->control_flags = cpu_to_le32(TFD_CTL_COUNT_SET(count) |
 884                                          TFD_CTL_PAD_SET(pad));
 885
 886         return 0;
 887 }
 888
 889 /**
 890  * iwl3945_hw_txq_free_tfd - Free one TFD, those at index [txq->q.read_ptr]
 891  *
 892  * Does NOT advance any indexes
 893  */
 894 int iwl3945_hw_txq_free_tfd(struct iwl3945_priv *priv, struct iwl3945_tx_queue *txq)
 895 {
 896         struct iwl3945_tfd_frame *bd_tmp = (struct iwl3945_tfd_frame *)&txq->bd[0];
 897         struct iwl3945_tfd_frame *bd = &bd_tmp[txq->q.read_ptr];
 898         struct pci_dev *dev = priv->pci_dev;
 899         int i;
 900         int counter;
 901
 902         /* classify bd */
 903         if (txq->q.id == IWL_CMD_QUEUE_NUM)
 904                 /* nothing to cleanup after for host commands */
 905                 return 0;
 906
 907         /* sanity check */
 908         counter = TFD_CTL_COUNT_GET(le32_to_cpu(bd->control_flags));
 909         if (counter > NUM_TFD_CHUNKS) {
 910                 IWL_ERROR("Too many chunks: %i\n", counter);
 911                 /* @todo issue fatal error, it is quite serious situation */
 912                 return 0;
 913         }
 914
 915         /* unmap chunks if any */
 916
 917         for (i = 1; i < counter; i++) {
 918                 pci_unmap_single(dev, le32_to_cpu(bd->pa[i].addr),
 919                                  le32_to_cpu(bd->pa[i].len), PCI_DMA_TODEVICE);
 920                 if (txq->txb[txq->q.read_ptr].skb[0]) {
 921                         struct sk_buff *skb = txq->txb[txq->q.read_ptr].skb[0];
 922                         if (txq->txb[txq->q.read_ptr].skb[0]) {
 923                                 /* Can be called from interrupt context */
 924                                 dev_kfree_skb_any(skb);
 925                                 txq->txb[txq->q.read_ptr].skb[0] = NULL;
 926                         }
 927                 }
 928         }
 929         return 0;
 930 }
 931
 932 u8 iwl3945_hw_find_station(struct iwl3945_priv *priv, const u8 *addr)
 933 {
 934         int i;
 935         int ret = IWL_INVALID_STATION;
 936         unsigned long flags;
 937         DECLARE_MAC_BUF(mac);
 938
 939         spin_lock_irqsave(&priv->sta_lock, flags);
 940         for (i = IWL_STA_ID; i < priv->hw_setting.max_stations; i++)
 941                 if ((priv->stations[i].used) &&
 942                     (!compare_ether_addr
 943                      (priv->stations[i].sta.sta.addr, addr))) {
 944                         ret = i;
 945                         goto out;
 946                 }
 947
 948         IWL_DEBUG_INFO("can not find STA %s (total %d)\n",
 949                        print_mac(mac, addr), priv->num_stations);
 950  out:
 951         spin_unlock_irqrestore(&priv->sta_lock, flags);
 952         return ret;
 953 }
 954
 955 /**
 956  * iwl3945_hw_build_tx_cmd_rate - Add rate portion to TX_CMD:
 957  *
 958 */
 959 void iwl3945_hw_build_tx_cmd_rate(struct iwl3945_priv *priv,
 960                               struct iwl3945_cmd *cmd,
 961                               struct ieee80211_tx_control *ctrl,
 962                               struct ieee80211_hdr *hdr, int sta_id, int tx_id)
 963 {
 964         unsigned long flags;
 965         u16 rate_index = min(ctrl->tx_rate->hw_value & 0xffff, IWL_RATE_COUNT - 1);
 966         u16 rate_mask;
 967         int rate;
 968         u8 rts_retry_limit;
 969         u8 data_retry_limit;
 970         __le32 tx_flags;
 971         u16 fc = le16_to_cpu(hdr->frame_control);
 972
 973         rate = iwl3945_rates[rate_index].plcp;
 974         tx_flags = cmd->cmd.tx.tx_flags;
 975
 976         /* We need to figure out how to get the sta->supp_rates while
 977          * in this running context; perhaps encoding into ctrl->tx_rate? */
 978         rate_mask = IWL_RATES_MASK;
 979
 980         spin_lock_irqsave(&priv->sta_lock, flags);
 981
 982         priv->stations[sta_id].current_rate.rate_n_flags = rate;
 983
 984         if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) &&
 985             (sta_id != priv->hw_setting.bcast_sta_id) &&
 986                 (sta_id != IWL_MULTICAST_ID))
 987                 priv->stations[IWL_STA_ID].current_rate.rate_n_flags = rate;
 988
 989         spin_unlock_irqrestore(&priv->sta_lock, flags);
 990
 991         if (tx_id >= IWL_CMD_QUEUE_NUM)
 992                 rts_retry_limit = 3;
 993         else
 994                 rts_retry_limit = 7;
 995
 996         if (ieee80211_is_probe_response(fc)) {
 997                 data_retry_limit = 3;
 998                 if (data_retry_limit < rts_retry_limit)
 999                         rts_retry_limit = data_retry_limit;
1000         } else
1001                 data_retry_limit = IWL_DEFAULT_TX_RETRY;
1002
1003         if (priv->data_retry_limit != -1)
1004                 data_retry_limit = priv->data_retry_limit;
1005
1006         if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
1007                 switch (fc & IEEE80211_FCTL_STYPE) {
1008                 case IEEE80211_STYPE_AUTH:
1009                 case IEEE80211_STYPE_DEAUTH:
1010                 case IEEE80211_STYPE_ASSOC_REQ:
1011                 case IEEE80211_STYPE_REASSOC_REQ:
1012                         if (tx_flags & TX_CMD_FLG_RTS_MSK) {
1013                                 tx_flags &= ~TX_CMD_FLG_RTS_MSK;
1014                                 tx_flags |= TX_CMD_FLG_CTS_MSK;
1015                         }
1016                         break;
1017                 default:
1018                         break;
1019                 }
1020         }
1021
1022         cmd->cmd.tx.rts_retry_limit = rts_retry_limit;
1023         cmd->cmd.tx.data_retry_limit = data_retry_limit;
1024         cmd->cmd.tx.rate = rate;
1025         cmd->cmd.tx.tx_flags = tx_flags;
1026
1027         /* OFDM */
1028         cmd->cmd.tx.supp_rates[0] =
1029            ((rate_mask & IWL_OFDM_RATES_MASK) >> IWL_FIRST_OFDM_RATE) & 0xFF;
1030
1031         /* CCK */
1032         cmd->cmd.tx.supp_rates[1] = (rate_mask & 0xF);
1033
1034         IWL_DEBUG_RATE("Tx sta id: %d, rate: %d (plcp), flags: 0x%4X "
1035                        "cck/ofdm mask: 0x%x/0x%x\n", sta_id,
1036                        cmd->cmd.tx.rate, le32_to_cpu(cmd->cmd.tx.tx_flags),
1037                        cmd->cmd.tx.supp_rates[1], cmd->cmd.tx.supp_rates[0]);
1038 }
1039
1040 u8 iwl3945_sync_sta(struct iwl3945_priv *priv, int sta_id, u16 tx_rate, u8 flags)
1041 {
1042         unsigned long flags_spin;
1043         struct iwl3945_station_entry *station;
1044
1045         if (sta_id == IWL_INVALID_STATION)
1046                 return IWL_INVALID_STATION;
1047
1048         spin_lock_irqsave(&priv->sta_lock, flags_spin);
1049         station = &priv->stations[sta_id];
1050
1051         station->sta.sta.modify_mask = STA_MODIFY_TX_RATE_MSK;
1052         station->sta.rate_n_flags = cpu_to_le16(tx_rate);
1053         station->current_rate.rate_n_flags = tx_rate;
1054         station->sta.mode = STA_CONTROL_MODIFY_MSK;
1055
1056         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
1057
1058         iwl3945_send_add_station(priv, &station->sta, flags);
1059         IWL_DEBUG_RATE("SCALE sync station %d to rate %d\n",
1060                         sta_id, tx_rate);
1061         return sta_id;
1062 }
1063
1064 static int iwl3945_nic_set_pwr_src(struct iwl3945_priv *priv, int pwr_max)
1065 {
1066         int rc;
1067         unsigned long flags;
1068
1069         spin_lock_irqsave(&priv->lock, flags);
1070         rc = iwl3945_grab_nic_access(priv);
1071         if (rc) {
1072                 spin_unlock_irqrestore(&priv->lock, flags);
1073                 return rc;
1074         }
1075
1076         if (!pwr_max) {
1077                 u32 val;
1078
1079                 rc = pci_read_config_dword(priv->pci_dev,
1080                                 PCI_POWER_SOURCE, &val);
1081                 if (val & PCI_CFG_PMC_PME_FROM_D3COLD_SUPPORT) {
1082                         iwl3945_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
1083                                         APMG_PS_CTRL_VAL_PWR_SRC_VAUX,
1084                                         ~APMG_PS_CTRL_MSK_PWR_SRC);
1085                         iwl3945_release_nic_access(priv);
1086
1087                         iwl3945_poll_bit(priv, CSR_GPIO_IN,
1088                                      CSR_GPIO_IN_VAL_VAUX_PWR_SRC,
1089                                      CSR_GPIO_IN_BIT_AUX_POWER, 5000);
1090                 } else
1091                         iwl3945_release_nic_access(priv);
1092         } else {
1093                 iwl3945_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
1094                                 APMG_PS_CTRL_VAL_PWR_SRC_VMAIN,
1095                                 ~APMG_PS_CTRL_MSK_PWR_SRC);
1096
1097                 iwl3945_release_nic_access(priv);
1098                 iwl3945_poll_bit(priv, CSR_GPIO_IN, CSR_GPIO_IN_VAL_VMAIN_PWR_SRC,
1099                              CSR_GPIO_IN_BIT_AUX_POWER, 5000);  /* uS */
1100         }
1101         spin_unlock_irqrestore(&priv->lock, flags);
1102
1103         return rc;
1104 }
1105
1106 static int iwl3945_rx_init(struct iwl3945_priv *priv, struct iwl3945_rx_queue *rxq)
1107 {
1108         int rc;
1109         unsigned long flags;
1110
1111         spin_lock_irqsave(&priv->lock, flags);
1112         rc = iwl3945_grab_nic_access(priv);
1113         if (rc) {
1114                 spin_unlock_irqrestore(&priv->lock, flags);
1115                 return rc;
1116         }
1117
1118         iwl3945_write_direct32(priv, FH_RCSR_RBD_BASE(0), rxq->dma_addr);
1119         iwl3945_write_direct32(priv, FH_RCSR_RPTR_ADDR(0),
1120                              priv->hw_setting.shared_phys +
1121                              offsetof(struct iwl3945_shared, rx_read_ptr[0]));
1122         iwl3945_write_direct32(priv, FH_RCSR_WPTR(0), 0);
1123         iwl3945_write_direct32(priv, FH_RCSR_CONFIG(0),
1124                 ALM_FH_RCSR_RX_CONFIG_REG_VAL_DMA_CHNL_EN_ENABLE |
1125                 ALM_FH_RCSR_RX_CONFIG_REG_VAL_RDRBD_EN_ENABLE |
1126                 ALM_FH_RCSR_RX_CONFIG_REG_BIT_WR_STTS_EN |
1127                 ALM_FH_RCSR_RX_CONFIG_REG_VAL_MAX_FRAG_SIZE_128 |
1128                 (RX_QUEUE_SIZE_LOG << ALM_FH_RCSR_RX_CONFIG_REG_POS_RBDC_SIZE) |
1129                 ALM_FH_RCSR_RX_CONFIG_REG_VAL_IRQ_DEST_INT_HOST |
1130                 (1 << ALM_FH_RCSR_RX_CONFIG_REG_POS_IRQ_RBTH) |
1131                 ALM_FH_RCSR_RX_CONFIG_REG_VAL_MSG_MODE_FH);
1132
1133         /* fake read to flush all prev I/O */
1134         iwl3945_read_direct32(priv, FH_RSSR_CTRL);
1135
1136         iwl3945_release_nic_access(priv);
1137         spin_unlock_irqrestore(&priv->lock, flags);
1138
1139         return 0;
1140 }
1141
1142 static int iwl3945_tx_reset(struct iwl3945_priv *priv)
1143 {
1144         int rc;
1145         unsigned long flags;
1146
1147         spin_lock_irqsave(&priv->lock, flags);
1148         rc = iwl3945_grab_nic_access(priv);
1149         if (rc) {
1150                 spin_unlock_irqrestore(&priv->lock, flags);
1151                 return rc;
1152         }
1153
1154         /* bypass mode */
1155         iwl3945_write_prph(priv, ALM_SCD_MODE_REG, 0x2);
1156
1157         /* RA 0 is active */
1158         iwl3945_write_prph(priv, ALM_SCD_ARASTAT_REG, 0x01);
1159
1160         /* all 6 fifo are active */
1161         iwl3945_write_prph(priv, ALM_SCD_TXFACT_REG, 0x3f);
1162
1163         iwl3945_write_prph(priv, ALM_SCD_SBYP_MODE_1_REG, 0x010000);
1164         iwl3945_write_prph(priv, ALM_SCD_SBYP_MODE_2_REG, 0x030002);
1165         iwl3945_write_prph(priv, ALM_SCD_TXF4MF_REG, 0x000004);
1166         iwl3945_write_prph(priv, ALM_SCD_TXF5MF_REG, 0x000005);
1167
1168         iwl3945_write_direct32(priv, FH_TSSR_CBB_BASE,
1169                              priv->hw_setting.shared_phys);
1170
1171         iwl3945_write_direct32(priv, FH_TSSR_MSG_CONFIG,
1172                 ALM_FH_TSSR_TX_MSG_CONFIG_REG_VAL_SNOOP_RD_TXPD_ON |
1173                 ALM_FH_TSSR_TX_MSG_CONFIG_REG_VAL_ORDER_RD_TXPD_ON |
1174                 ALM_FH_TSSR_TX_MSG_CONFIG_REG_VAL_MAX_FRAG_SIZE_128B |
1175                 ALM_FH_TSSR_TX_MSG_CONFIG_REG_VAL_SNOOP_RD_TFD_ON |
1176                 ALM_FH_TSSR_TX_MSG_CONFIG_REG_VAL_ORDER_RD_CBB_ON |
1177                 ALM_FH_TSSR_TX_MSG_CONFIG_REG_VAL_ORDER_RSP_WAIT_TH |
1178                 ALM_FH_TSSR_TX_MSG_CONFIG_REG_VAL_RSP_WAIT_TH);
1179
1180         iwl3945_release_nic_access(priv);
1181         spin_unlock_irqrestore(&priv->lock, flags);
1182
1183         return 0;
1184 }
1185
1186 /**
1187  * iwl3945_txq_ctx_reset - Reset TX queue context
1188  *
1189  * Destroys all DMA structures and initialize them again
1190  */
1191 static int iwl3945_txq_ctx_reset(struct iwl3945_priv *priv)
1192 {
1193         int rc;
1194         int txq_id, slots_num;
1195
1196         iwl3945_hw_txq_ctx_free(priv);
1197
1198         /* Tx CMD queue */
1199         rc = iwl3945_tx_reset(priv);
1200         if (rc)
1201                 goto error;
1202
1203         /* Tx queue(s) */
1204         for (txq_id = 0; txq_id < TFD_QUEUE_MAX; txq_id++) {
1205                 slots_num = (txq_id == IWL_CMD_QUEUE_NUM) ?
1206                                 TFD_CMD_SLOTS : TFD_TX_CMD_SLOTS;
1207                 rc = iwl3945_tx_queue_init(priv, &priv->txq[txq_id], slots_num,
1208                                 txq_id);
1209                 if (rc) {
1210                         IWL_ERROR("Tx %d queue init failed\n", txq_id);
1211                         goto error;
1212                 }
1213         }
1214
1215         return rc;
1216
1217  error:
1218         iwl3945_hw_txq_ctx_free(priv);
1219         return rc;
1220 }
1221
1222 int iwl3945_hw_nic_init(struct iwl3945_priv *priv)
1223 {
1224         u8 rev_id;
1225         int rc;
1226         unsigned long flags;
1227         struct iwl3945_rx_queue *rxq = &priv->rxq;
1228
1229         iwl3945_power_init_handle(priv);
1230
1231         spin_lock_irqsave(&priv->lock, flags);
1232         iwl3945_set_bit(priv, CSR_ANA_PLL_CFG, (1 << 24));
1233         iwl3945_set_bit(priv, CSR_GIO_CHICKEN_BITS,
1234                     CSR_GIO_CHICKEN_BITS_REG_BIT_L1A_NO_L0S_RX);
1235
1236         iwl3945_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
1237         rc = iwl3945_poll_bit(priv, CSR_GP_CNTRL,
1238                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
1239                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
1240         if (rc < 0) {
1241                 spin_unlock_irqrestore(&priv->lock, flags);
1242                 IWL_DEBUG_INFO("Failed to init the card\n");
1243                 return rc;
1244         }
1245
1246         rc = iwl3945_grab_nic_access(priv);
1247         if (rc) {
1248                 spin_unlock_irqrestore(&priv->lock, flags);
1249                 return rc;
1250         }
1251         iwl3945_write_prph(priv, APMG_CLK_EN_REG,
1252                                  APMG_CLK_VAL_DMA_CLK_RQT |
1253                                  APMG_CLK_VAL_BSM_CLK_RQT);
1254         udelay(20);
1255         iwl3945_set_bits_prph(priv, APMG_PCIDEV_STT_REG,
1256                                     APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
1257         iwl3945_release_nic_access(priv);
1258         spin_unlock_irqrestore(&priv->lock, flags);
1259
1260         /* Determine HW type */
1261         rc = pci_read_config_byte(priv->pci_dev, PCI_REVISION_ID, &rev_id);
1262         if (rc)
1263                 return rc;
1264         IWL_DEBUG_INFO("HW Revision ID = 0x%X\n", rev_id);
1265
1266         iwl3945_nic_set_pwr_src(priv, 1);
1267         spin_lock_irqsave(&priv->lock, flags);
1268
1269         if (rev_id & PCI_CFG_REV_ID_BIT_RTP)
1270                 IWL_DEBUG_INFO("RTP type \n");
1271         else if (rev_id & PCI_CFG_REV_ID_BIT_BASIC_SKU) {
1272                 IWL_DEBUG_INFO("3945 RADIO-MB type\n");
1273                 iwl3945_set_bit(priv, CSR_HW_IF_CONFIG_REG,
1274                             CSR39_HW_IF_CONFIG_REG_BIT_3945_MB);
1275         } else {
1276                 IWL_DEBUG_INFO("3945 RADIO-MM type\n");
1277                 iwl3945_set_bit(priv, CSR_HW_IF_CONFIG_REG,
1278                             CSR39_HW_IF_CONFIG_REG_BIT_3945_MM);
1279         }
1280
1281         if (EEPROM_SKU_CAP_OP_MODE_MRC == priv->eeprom.sku_cap) {
1282                 IWL_DEBUG_INFO("SKU OP mode is mrc\n");
1283                 iwl3945_set_bit(priv, CSR_HW_IF_CONFIG_REG,
1284                             CSR39_HW_IF_CONFIG_REG_BIT_SKU_MRC);
1285         } else
1286                 IWL_DEBUG_INFO("SKU OP mode is basic\n");
1287
1288         if ((priv->eeprom.board_revision & 0xF0) == 0xD0) {
1289                 IWL_DEBUG_INFO("3945ABG revision is 0x%X\n",
1290                                priv->eeprom.board_revision);
1291                 iwl3945_set_bit(priv, CSR_HW_IF_CONFIG_REG,
1292                             CSR39_HW_IF_CONFIG_REG_BIT_BOARD_TYPE);
1293         } else {
1294                 IWL_DEBUG_INFO("3945ABG revision is 0x%X\n",
1295                                priv->eeprom.board_revision);
1296                 iwl3945_clear_bit(priv, CSR_HW_IF_CONFIG_REG,
1297                               CSR39_HW_IF_CONFIG_REG_BIT_BOARD_TYPE);
1298         }
1299
1300         if (priv->eeprom.almgor_m_version <= 1) {
1301                 iwl3945_set_bit(priv, CSR_HW_IF_CONFIG_REG,
1302                             CSR39_HW_IF_CONFIG_REG_BITS_SILICON_TYPE_A);
1303                 IWL_DEBUG_INFO("Card M type A version is 0x%X\n",
1304                                priv->eeprom.almgor_m_version);
1305         } else {
1306                 IWL_DEBUG_INFO("Card M type B version is 0x%X\n",
1307                                priv->eeprom.almgor_m_version);
1308                 iwl3945_set_bit(priv, CSR_HW_IF_CONFIG_REG,
1309                             CSR39_HW_IF_CONFIG_REG_BITS_SILICON_TYPE_B);
1310         }
1311         spin_unlock_irqrestore(&priv->lock, flags);
1312
1313         if (priv->eeprom.sku_cap & EEPROM_SKU_CAP_SW_RF_KILL_ENABLE)
1314                 IWL_DEBUG_RF_KILL("SW RF KILL supported in EEPROM.\n");
1315
1316         if (priv->eeprom.sku_cap & EEPROM_SKU_CAP_HW_RF_KILL_ENABLE)
1317                 IWL_DEBUG_RF_KILL("HW RF KILL supported in EEPROM.\n");
1318
1319         /* Allocate the RX queue, or reset if it is already allocated */
1320         if (!rxq->bd) {
1321                 rc = iwl3945_rx_queue_alloc(priv);
1322                 if (rc) {
1323                         IWL_ERROR("Unable to initialize Rx queue\n");
1324                         return -ENOMEM;
1325                 }
1326         } else
1327                 iwl3945_rx_queue_reset(priv, rxq);
1328
1329         iwl3945_rx_replenish(priv);
1330
1331         iwl3945_rx_init(priv, rxq);
1332
1333         spin_lock_irqsave(&priv->lock, flags);
1334
1335         /* Look at using this instead:
1336         rxq->need_update = 1;
1337         iwl3945_rx_queue_update_write_ptr(priv, rxq);
1338         */
1339
1340         rc = iwl3945_grab_nic_access(priv);
1341         if (rc) {
1342                 spin_unlock_irqrestore(&priv->lock, flags);
1343                 return rc;
1344         }
1345         iwl3945_write_direct32(priv, FH_RCSR_WPTR(0), rxq->write & ~7);
1346         iwl3945_release_nic_access(priv);
1347
1348         spin_unlock_irqrestore(&priv->lock, flags);
1349
1350         rc = iwl3945_txq_ctx_reset(priv);
1351         if (rc)
1352                 return rc;
1353
1354         set_bit(STATUS_INIT, &priv->status);
1355
1356         return 0;
1357 }
1358
1359 /**
1360  * iwl3945_hw_txq_ctx_free - Free TXQ Context
1361  *
1362  * Destroy all TX DMA queues and structures
1363  */
1364 void iwl3945_hw_txq_ctx_free(struct iwl3945_priv *priv)
1365 {
1366         int txq_id;
1367
1368         /* Tx queues */
1369         for (txq_id = 0; txq_id < TFD_QUEUE_MAX; txq_id++)
1370                 iwl3945_tx_queue_free(priv, &priv->txq[txq_id]);
1371 }
1372
1373 void iwl3945_hw_txq_ctx_stop(struct iwl3945_priv *priv)
1374 {
1375         int queue;
1376         unsigned long flags;
1377
1378         spin_lock_irqsave(&priv->lock, flags);
1379         if (iwl3945_grab_nic_access(priv)) {
1380                 spin_unlock_irqrestore(&priv->lock, flags);
1381                 iwl3945_hw_txq_ctx_free(priv);
1382                 return;
1383         }
1384
1385         /* stop SCD */
1386         iwl3945_write_prph(priv, ALM_SCD_MODE_REG, 0);
1387
1388         /* reset TFD queues */
1389         for (queue = TFD_QUEUE_MIN; queue < TFD_QUEUE_MAX; queue++) {
1390                 iwl3945_write_direct32(priv, FH_TCSR_CONFIG(queue), 0x0);
1391                 iwl3945_poll_direct_bit(priv, FH_TSSR_TX_STATUS,
1392                                 ALM_FH_TSSR_TX_STATUS_REG_MSK_CHNL_IDLE(queue),
1393                                 1000);
1394         }
1395
1396         iwl3945_release_nic_access(priv);
1397         spin_unlock_irqrestore(&priv->lock, flags);
1398
1399         iwl3945_hw_txq_ctx_free(priv);
1400 }
1401
1402 int iwl3945_hw_nic_stop_master(struct iwl3945_priv *priv)
1403 {
1404         int rc = 0;
1405         u32 reg_val;
1406         unsigned long flags;
1407
1408         spin_lock_irqsave(&priv->lock, flags);
1409
1410         /* set stop master bit */
1411         iwl3945_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
1412
1413         reg_val = iwl3945_read32(priv, CSR_GP_CNTRL);
1414
1415         if (CSR_GP_CNTRL_REG_FLAG_MAC_POWER_SAVE ==
1416             (reg_val & CSR_GP_CNTRL_REG_MSK_POWER_SAVE_TYPE))
1417                 IWL_DEBUG_INFO("Card in power save, master is already "
1418                                "stopped\n");
1419         else {
1420                 rc = iwl3945_poll_bit(priv, CSR_RESET,
1421                                   CSR_RESET_REG_FLAG_MASTER_DISABLED,
1422                                   CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
1423                 if (rc < 0) {
1424                         spin_unlock_irqrestore(&priv->lock, flags);
1425                         return rc;
1426                 }
1427         }
1428
1429         spin_unlock_irqrestore(&priv->lock, flags);
1430         IWL_DEBUG_INFO("stop master\n");
1431
1432         return rc;
1433 }
1434
1435 int iwl3945_hw_nic_reset(struct iwl3945_priv *priv)
1436 {
1437         int rc;
1438         unsigned long flags;
1439
1440         iwl3945_hw_nic_stop_master(priv);
1441
1442         spin_lock_irqsave(&priv->lock, flags);
1443
1444         iwl3945_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
1445
1446         rc = iwl3945_poll_bit(priv, CSR_GP_CNTRL,
1447                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
1448                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
1449
1450         rc = iwl3945_grab_nic_access(priv);
1451         if (!rc) {
1452                 iwl3945_write_prph(priv, APMG_CLK_CTRL_REG,
1453                                          APMG_CLK_VAL_BSM_CLK_RQT);
1454
1455                 udelay(10);
1456
1457                 iwl3945_set_bit(priv, CSR_GP_CNTRL,
1458                             CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
1459
1460                 iwl3945_write_prph(priv, APMG_RTC_INT_MSK_REG, 0x0);
1461                 iwl3945_write_prph(priv, APMG_RTC_INT_STT_REG,
1462                                         0xFFFFFFFF);
1463
1464                 /* enable DMA */
1465                 iwl3945_write_prph(priv, APMG_CLK_EN_REG,
1466                                          APMG_CLK_VAL_DMA_CLK_RQT |
1467                                          APMG_CLK_VAL_BSM_CLK_RQT);
1468                 udelay(10);
1469
1470                 iwl3945_set_bits_prph(priv, APMG_PS_CTRL_REG,
1471                                 APMG_PS_CTRL_VAL_RESET_REQ);
1472                 udelay(5);
1473                 iwl3945_clear_bits_prph(priv, APMG_PS_CTRL_REG,
1474                                 APMG_PS_CTRL_VAL_RESET_REQ);
1475                 iwl3945_release_nic_access(priv);
1476         }
1477
1478         /* Clear the 'host command active' bit... */
1479         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
1480
1481         wake_up_interruptible(&priv->wait_command_queue);
1482         spin_unlock_irqrestore(&priv->lock, flags);
1483
1484         return rc;
1485 }
1486
1487 /**
1488  * iwl3945_hw_reg_adjust_power_by_temp
1489  * return index delta into power gain settings table
1490 */
1491 static int iwl3945_hw_reg_adjust_power_by_temp(int new_reading, int old_reading)
1492 {
1493         return (new_reading - old_reading) * (-11) / 100;
1494 }
1495
1496 /**
1497  * iwl3945_hw_reg_temp_out_of_range - Keep temperature in sane range
1498  */
1499 static inline int iwl3945_hw_reg_temp_out_of_range(int temperature)
1500 {
1501         return (((temperature < -260) || (temperature > 25)) ? 1 : 0);
1502 }
1503
1504 int iwl3945_hw_get_temperature(struct iwl3945_priv *priv)
1505 {
1506         return iwl3945_read32(priv, CSR_UCODE_DRV_GP2);
1507 }
1508
1509 /**
1510  * iwl3945_hw_reg_txpower_get_temperature
1511  * get the current temperature by reading from NIC
1512 */
1513 static int iwl3945_hw_reg_txpower_get_temperature(struct iwl3945_priv *priv)
1514 {
1515         int temperature;
1516
1517         temperature = iwl3945_hw_get_temperature(priv);
1518
1519         /* driver's okay range is -260 to +25.
1520          *   human readable okay range is 0 to +285 */
1521         IWL_DEBUG_INFO("Temperature: %d\n", temperature + IWL_TEMP_CONVERT);
1522
1523         /* handle insane temp reading */
1524         if (iwl3945_hw_reg_temp_out_of_range(temperature)) {
1525                 IWL_ERROR("Error bad temperature value  %d\n", temperature);
1526
1527                 /* if really really hot(?),
1528                  *   substitute the 3rd band/group's temp measured at factory */
1529                 if (priv->last_temperature > 100)
1530                         temperature = priv->eeprom.groups[2].temperature;
1531                 else /* else use most recent "sane" value from driver */
1532                         temperature = priv->last_temperature;
1533         }
1534
1535         return temperature;     /* raw, not "human readable" */
1536 }
1537
1538 /* Adjust Txpower only if temperature variance is greater than threshold.
1539  *
1540  * Both are lower than older versions' 9 degrees */
1541 #define IWL_TEMPERATURE_LIMIT_TIMER   6
1542
1543 /**
1544  * is_temp_calib_needed - determines if new calibration is needed
1545  *
1546  * records new temperature in tx_mgr->temperature.
1547  * replaces tx_mgr->last_temperature *only* if calib needed
1548  *    (assumes caller will actually do the calibration!). */
1549 static int is_temp_calib_needed(struct iwl3945_priv *priv)
1550 {
1551         int temp_diff;
1552
1553         priv->temperature = iwl3945_hw_reg_txpower_get_temperature(priv);
1554         temp_diff = priv->temperature - priv->last_temperature;
1555
1556         /* get absolute value */
1557         if (temp_diff < 0) {
1558                 IWL_DEBUG_POWER("Getting cooler, delta %d,\n", temp_diff);
1559                 temp_diff = -temp_diff;
1560         } else if (temp_diff == 0)
1561                 IWL_DEBUG_POWER("Same temp,\n");
1562         else
1563                 IWL_DEBUG_POWER("Getting warmer, delta %d,\n", temp_diff);
1564
1565         /* if we don't need calibration, *don't* update last_temperature */
1566         if (temp_diff < IWL_TEMPERATURE_LIMIT_TIMER) {
1567                 IWL_DEBUG_POWER("Timed thermal calib not needed\n");
1568                 return 0;
1569         }
1570
1571         IWL_DEBUG_POWER("Timed thermal calib needed\n");
1572
1573         /* assume that caller will actually do calib ...
1574          *   update the "last temperature" value */
1575         priv->last_temperature = priv->temperature;
1576         return 1;
1577 }
1578
1579 #define IWL_MAX_GAIN_ENTRIES 78
1580 #define IWL_CCK_FROM_OFDM_POWER_DIFF  -5
1581 #define IWL_CCK_FROM_OFDM_INDEX_DIFF (10)
1582
1583 /* radio and DSP power table, each step is 1/2 dB.
1584  * 1st number is for RF analog gain, 2nd number is for DSP pre-DAC gain. */
1585 static struct iwl3945_tx_power power_gain_table[2][IWL_MAX_GAIN_ENTRIES] = {
1586         {
1587          {251, 127},            /* 2.4 GHz, highest power */
1588          {251, 127},
1589          {251, 127},
1590          {251, 127},
1591          {251, 125},
1592          {251, 110},
1593          {251, 105},
1594          {251, 98},
1595          {187, 125},
1596          {187, 115},
1597          {187, 108},
1598          {187, 99},
1599          {243, 119},
1600          {243, 111},
1601          {243, 105},
1602          {243, 97},
1603          {243, 92},
1604          {211, 106},
1605          {211, 100},
1606          {179, 120},
1607          {179, 113},
1608          {179, 107},
1609          {147, 125},
1610          {147, 119},
1611          {147, 112},
1612          {147, 106},
1613          {147, 101},
1614          {147, 97},
1615          {147, 91},
1616          {115, 107},
1617          {235, 121},
1618          {235, 115},
1619          {235, 109},
1620          {203, 127},
1621          {203, 121},
1622          {203, 115},
1623          {203, 108},
1624          {203, 102},
1625          {203, 96},
1626          {203, 92},
1627          {171, 110},
1628          {171, 104},
1629          {171, 98},
1630          {139, 116},
1631          {227, 125},
1632          {227, 119},
1633          {227, 113},
1634          {227, 107},
1635          {227, 101},
1636          {227, 96},
1637          {195, 113},
1638          {195, 106},
1639          {195, 102},
1640          {195, 95},
1641          {163, 113},
1642          {163, 106},
1643          {163, 102},
1644          {163, 95},
1645          {131, 113},
1646          {131, 106},
1647          {131, 102},
1648          {131, 95},
1649          {99, 113},
1650          {99, 106},
1651          {99, 102},
1652          {99, 95},
1653          {67, 113},
1654          {67, 106},
1655          {67, 102},
1656          {67, 95},
1657          {35, 113},
1658          {35, 106},
1659          {35, 102},
1660          {35, 95},
1661          {3, 113},
1662          {3, 106},
1663          {3, 102},
1664          {3, 95} },             /* 2.4 GHz, lowest power */
1665         {
1666          {251, 127},            /* 5.x GHz, highest power */
1667          {251, 120},
1668          {251, 114},
1669          {219, 119},
1670          {219, 101},
1671          {187, 113},
1672          {187, 102},
1673          {155, 114},
1674          {155, 103},
1675          {123, 117},
1676          {123, 107},
1677          {123, 99},
1678          {123, 92},
1679          {91, 108},
1680          {59, 125},
1681          {59, 118},
1682          {59, 109},
1683          {59, 102},
1684          {59, 96},
1685          {59, 90},
1686          {27, 104},
1687          {27, 98},
1688          {27, 92},
1689          {115, 118},
1690          {115, 111},
1691          {115, 104},
1692          {83, 126},
1693          {83, 121},
1694          {83, 113},
1695          {83, 105},
1696          {83, 99},
1697          {51, 118},
1698          {51, 111},
1699          {51, 104},
1700          {51, 98},
1701          {19, 116},
1702          {19, 109},
1703          {19, 102},
1704          {19, 98},
1705          {19, 93},
1706          {171, 113},
1707          {171, 107},
1708          {171, 99},
1709          {139, 120},
1710          {139, 113},
1711          {139, 107},
1712          {139, 99},
1713          {107, 120},
1714          {107, 113},
1715          {107, 107},
1716          {107, 99},
1717          {75, 120},
1718          {75, 113},
1719          {75, 107},
1720          {75, 99},
1721          {43, 120},
1722          {43, 113},
1723          {43, 107},
1724          {43, 99},
1725          {11, 120},
1726          {11, 113},
1727          {11, 107},
1728          {11, 99},
1729          {131, 107},
1730          {131, 99},
1731          {99, 120},
1732          {99, 113},
1733          {99, 107},
1734          {99, 99},
1735          {67, 120},
1736          {67, 113},
1737          {67, 107},
1738          {67, 99},
1739          {35, 120},
1740          {35, 113},
1741          {35, 107},
1742          {35, 99},
1743          {3, 120} }             /* 5.x GHz, lowest power */
1744 };
1745
1746 static inline u8 iwl3945_hw_reg_fix_power_index(int index)
1747 {
1748         if (index < 0)
1749                 return 0;
1750         if (index >= IWL_MAX_GAIN_ENTRIES)
1751                 return IWL_MAX_GAIN_ENTRIES - 1;
1752         return (u8) index;
1753 }
1754
1755 /* Kick off thermal recalibration check every 60 seconds */
1756 #define REG_RECALIB_PERIOD (60)
1757
1758 /**
1759  * iwl3945_hw_reg_set_scan_power - Set Tx power for scan probe requests
1760  *
1761  * Set (in our channel info database) the direct scan Tx power for 1 Mbit (CCK)
1762  * or 6 Mbit (OFDM) rates.
1763  */
1764 static void iwl3945_hw_reg_set_scan_power(struct iwl3945_priv *priv, u32 scan_tbl_index,
1765                                s32 rate_index, const s8 *clip_pwrs,
1766                                struct iwl3945_channel_info *ch_info,
1767                                int band_index)
1768 {
1769         struct iwl3945_scan_power_info *scan_power_info;
1770         s8 power;
1771         u8 power_index;
1772
1773         scan_power_info = &ch_info->scan_pwr_info[scan_tbl_index];
1774
1775         /* use this channel group's 6Mbit clipping/saturation pwr,
1776          *   but cap at regulatory scan power restriction (set during init
1777          *   based on eeprom channel data) for this channel.  */
1778         power = min(ch_info->scan_power, clip_pwrs[IWL_RATE_6M_INDEX_TABLE]);
1779
1780         /* further limit to user's max power preference.
1781          * FIXME:  Other spectrum management power limitations do not
1782          *   seem to apply?? */
1783         power = min(power, priv->user_txpower_limit);
1784         scan_power_info->requested_power = power;
1785
1786         /* find difference between new scan *power* and current "normal"
1787          *   Tx *power* for 6Mb.  Use this difference (x2) to adjust the
1788          *   current "normal" temperature-compensated Tx power *index* for
1789          *   this rate (1Mb or 6Mb) to yield new temp-compensated scan power
1790          *   *index*. */
1791         power_index = ch_info->power_info[rate_index].power_table_index
1792             - (power - ch_info->power_info
1793                [IWL_RATE_6M_INDEX_TABLE].requested_power) * 2;
1794
1795         /* store reference index that we use when adjusting *all* scan
1796          *   powers.  So we can accommodate user (all channel) or spectrum
1797          *   management (single channel) power changes "between" temperature
1798          *   feedback compensation procedures.
1799          * don't force fit this reference index into gain table; it may be a
1800          *   negative number.  This will help avoid errors when we're at
1801          *   the lower bounds (highest gains, for warmest temperatures)
1802          *   of the table. */
1803
1804         /* don't exceed table bounds for "real" setting */
1805         power_index = iwl3945_hw_reg_fix_power_index(power_index);
1806
1807         scan_power_info->power_table_index = power_index;
1808         scan_power_info->tpc.tx_gain =
1809             power_gain_table[band_index][power_index].tx_gain;
1810         scan_power_info->tpc.dsp_atten =
1811             power_gain_table[band_index][power_index].dsp_atten;
1812 }
1813
1814 /**
1815  * iwl3945_hw_reg_send_txpower - fill in Tx Power command with gain settings
1816  *
1817  * Configures power settings for all rates for the current channel,
1818  * using values from channel info struct, and send to NIC
1819  */
1820 int iwl3945_hw_reg_send_txpower(struct iwl3945_priv *priv)
1821 {
1822         int rate_idx, i;
1823         const struct iwl3945_channel_info *ch_info = NULL;
1824         struct iwl3945_txpowertable_cmd txpower = {
1825                 .channel = priv->active_rxon.channel,
1826         };
1827
1828         txpower.band = (priv->band == IEEE80211_BAND_5GHZ) ? 0 : 1;
1829         ch_info = iwl3945_get_channel_info(priv,
1830                                        priv->band,
1831                                        le16_to_cpu(priv->active_rxon.channel));
1832         if (!ch_info) {
1833                 IWL_ERROR
1834                     ("Failed to get channel info for channel %d [%d]\n",
1835                      le16_to_cpu(priv->active_rxon.channel), priv->band);
1836                 return -EINVAL;
1837         }
1838
1839         if (!is_channel_valid(ch_info)) {
1840                 IWL_DEBUG_POWER("Not calling TX_PWR_TABLE_CMD on "
1841                                 "non-Tx channel.\n");
1842                 return 0;
1843         }
1844
1845         /* fill cmd with power settings for all rates for current channel */
1846         /* Fill OFDM rate */
1847         for (rate_idx = IWL_FIRST_OFDM_RATE, i = 0;
1848              rate_idx <= IWL_LAST_OFDM_RATE; rate_idx++, i++) {
1849
1850                 txpower.power[i].tpc = ch_info->power_info[i].tpc;
1851                 txpower.power[i].rate = iwl3945_rates[rate_idx].plcp;
1852
1853                 IWL_DEBUG_POWER("ch %d:%d rf %d dsp %3d rate code 0x%02x\n",
1854                                 le16_to_cpu(txpower.channel),
1855                                 txpower.band,
1856                                 txpower.power[i].tpc.tx_gain,
1857                                 txpower.power[i].tpc.dsp_atten,
1858                                 txpower.power[i].rate);
1859         }
1860         /* Fill CCK rates */
1861         for (rate_idx = IWL_FIRST_CCK_RATE;
1862              rate_idx <= IWL_LAST_CCK_RATE; rate_idx++, i++) {
1863                 txpower.power[i].tpc = ch_info->power_info[i].tpc;
1864                 txpower.power[i].rate = iwl3945_rates[rate_idx].plcp;
1865
1866                 IWL_DEBUG_POWER("ch %d:%d rf %d dsp %3d rate code 0x%02x\n",
1867                                 le16_to_cpu(txpower.channel),
1868                                 txpower.band,
1869                                 txpower.power[i].tpc.tx_gain,
1870                                 txpower.power[i].tpc.dsp_atten,
1871                                 txpower.power[i].rate);
1872         }
1873
1874         return iwl3945_send_cmd_pdu(priv, REPLY_TX_PWR_TABLE_CMD,
1875                         sizeof(struct iwl3945_txpowertable_cmd), &txpower);
1876
1877 }
1878
1879 /**
1880  * iwl3945_hw_reg_set_new_power - Configures power tables at new levels
1881  * @ch_info: Channel to update.  Uses power_info.requested_power.
1882  *
1883  * Replace requested_power and base_power_index ch_info fields for
1884  * one channel.
1885  *
1886  * Called if user or spectrum management changes power preferences.
1887  * Takes into account h/w and modulation limitations (clip power).
1888  *
1889  * This does *not* send anything to NIC, just sets up ch_info for one channel.
1890  *
1891  * NOTE: reg_compensate_for_temperature_dif() *must* be run after this to
1892  *       properly fill out the scan powers, and actual h/w gain settings,
1893  *       and send changes to NIC
1894  */
1895 static int iwl3945_hw_reg_set_new_power(struct iwl3945_priv *priv,
1896                              struct iwl3945_channel_info *ch_info)
1897 {
1898         struct iwl3945_channel_power_info *power_info;
1899         int power_changed = 0;
1900         int i;
1901         const s8 *clip_pwrs;
1902         int power;
1903
1904         /* Get this chnlgrp's rate-to-max/clip-powers table */
1905         clip_pwrs = priv->clip_groups[ch_info->group_index].clip_powers;
1906
1907         /* Get this channel's rate-to-current-power settings table */
1908         power_info = ch_info->power_info;
1909
1910         /* update OFDM Txpower settings */
1911         for (i = IWL_RATE_6M_INDEX_TABLE; i <= IWL_RATE_54M_INDEX_TABLE;
1912              i++, ++power_info) {
1913                 int delta_idx;
1914
1915                 /* limit new power to be no more than h/w capability */
1916                 power = min(ch_info->curr_txpow, clip_pwrs[i]);
1917                 if (power == power_info->requested_power)
1918                         continue;
1919
1920                 /* find difference between old and new requested powers,
1921                  *    update base (non-temp-compensated) power index */
1922                 delta_idx = (power - power_info->requested_power) * 2;
1923                 power_info->base_power_index -= delta_idx;
1924
1925                 /* save new requested power value */
1926                 power_info->requested_power = power;
1927
1928                 power_changed = 1;
1929         }
1930
1931         /* update CCK Txpower settings, based on OFDM 12M setting ...
1932          *    ... all CCK power settings for a given channel are the *same*. */
1933         if (power_changed) {
1934                 power =
1935                     ch_info->power_info[IWL_RATE_12M_INDEX_TABLE].
1936                     requested_power + IWL_CCK_FROM_OFDM_POWER_DIFF;
1937
1938                 /* do all CCK rates' iwl3945_channel_power_info structures */
1939                 for (i = IWL_RATE_1M_INDEX_TABLE; i <= IWL_RATE_11M_INDEX_TABLE; i++) {
1940                         power_info->requested_power = power;
1941                         power_info->base_power_index =
1942                             ch_info->power_info[IWL_RATE_12M_INDEX_TABLE].
1943                             base_power_index + IWL_CCK_FROM_OFDM_INDEX_DIFF;
1944                         ++power_info;
1945                 }
1946         }
1947
1948         return 0;
1949 }
1950
1951 /**
1952  * iwl3945_hw_reg_get_ch_txpower_limit - returns new power limit for channel
1953  *
1954  * NOTE: Returned power limit may be less (but not more) than requested,
1955  *       based strictly on regulatory (eeprom and spectrum mgt) limitations
1956  *       (no consideration for h/w clipping limitations).
1957  */
1958 static int iwl3945_hw_reg_get_ch_txpower_limit(struct iwl3945_channel_info *ch_info)
1959 {
1960         s8 max_power;
1961
1962 #if 0
1963         /* if we're using TGd limits, use lower of TGd or EEPROM */
1964         if (ch_info->tgd_data.max_power != 0)
1965                 max_power = min(ch_info->tgd_data.max_power,
1966                                 ch_info->eeprom.max_power_avg);
1967
1968         /* else just use EEPROM limits */
1969         else
1970 #endif
1971                 max_power = ch_info->eeprom.max_power_avg;
1972
1973         return min(max_power, ch_info->max_power_avg);
1974 }
1975
1976 /**
1977  * iwl3945_hw_reg_comp_txpower_temp - Compensate for temperature
1978  *
1979  * Compensate txpower settings of *all* channels for temperature.
1980  * This only accounts for the difference between current temperature
1981  *   and the factory calibration temperatures, and bases the new settings
1982  *   on the channel's base_power_index.
1983  *
1984  * If RxOn is "associated", this sends the new Txpower to NIC!
1985  */
1986 static int iwl3945_hw_reg_comp_txpower_temp(struct iwl3945_priv *priv)
1987 {
1988         struct iwl3945_channel_info *ch_info = NULL;
1989         int delta_index;
1990         const s8 *clip_pwrs; /* array of h/w max power levels for each rate */
1991         u8 a_band;
1992         u8 rate_index;
1993         u8 scan_tbl_index;
1994         u8 i;
1995         int ref_temp;
1996         int temperature = priv->temperature;
1997
1998         /* set up new Tx power info for each and every channel, 2.4 and 5.x */
1999         for (i = 0; i < priv->channel_count; i++) {
2000                 ch_info = &priv->channel_info[i];
2001                 a_band = is_channel_a_band(ch_info);
2002
2003                 /* Get this chnlgrp's factory calibration temperature */
2004                 ref_temp = (s16)priv->eeprom.groups[ch_info->group_index].
2005                     temperature;
2006
2007                 /* get power index adjustment based on curr and factory
2008                  * temps */
2009                 delta_index = iwl3945_hw_reg_adjust_power_by_temp(temperature,
2010                                                               ref_temp);
2011
2012                 /* set tx power value for all rates, OFDM and CCK */
2013                 for (rate_index = 0; rate_index < IWL_RATE_COUNT;
2014                      rate_index++) {
2015                         int power_idx =
2016                             ch_info->power_info[rate_index].base_power_index;
2017
2018                         /* temperature compensate */
2019                         power_idx += delta_index;
2020
2021                         /* stay within table range */
2022                         power_idx = iwl3945_hw_reg_fix_power_index(power_idx);
2023                         ch_info->power_info[rate_index].
2024                             power_table_index = (u8) power_idx;
2025                         ch_info->power_info[rate_index].tpc =
2026                             power_gain_table[a_band][power_idx];
2027                 }
2028
2029                 /* Get this chnlgrp's rate-to-max/clip-powers table */
2030                 clip_pwrs = priv->clip_groups[ch_info->group_index].clip_powers;
2031
2032                 /* set scan tx power, 1Mbit for CCK, 6Mbit for OFDM */
2033                 for (scan_tbl_index = 0;
2034                      scan_tbl_index < IWL_NUM_SCAN_RATES; scan_tbl_index++) {
2035                         s32 actual_index = (scan_tbl_index == 0) ?
2036                             IWL_RATE_1M_INDEX_TABLE : IWL_RATE_6M_INDEX_TABLE;
2037                         iwl3945_hw_reg_set_scan_power(priv, scan_tbl_index,
2038                                            actual_index, clip_pwrs,
2039                                            ch_info, a_band);
2040                 }
2041         }
2042
2043         /* send Txpower command for current channel to ucode */
2044         return iwl3945_hw_reg_send_txpower(priv);
2045 }
2046
2047 int iwl3945_hw_reg_set_txpower(struct iwl3945_priv *priv, s8 power)
2048 {
2049         struct iwl3945_channel_info *ch_info;
2050         s8 max_power;
2051         u8 a_band;
2052         u8 i;
2053
2054         if (priv->user_txpower_limit == power) {
2055                 IWL_DEBUG_POWER("Requested Tx power same as current "
2056                                 "limit: %ddBm.\n", power);
2057                 return 0;
2058         }
2059
2060         IWL_DEBUG_POWER("Setting upper limit clamp to %ddBm.\n", power);
2061         priv->user_txpower_limit = power;
2062
2063         /* set up new Tx powers for each and every channel, 2.4 and 5.x */
2064
2065         for (i = 0; i < priv->channel_count; i++) {
2066                 ch_info = &priv->channel_info[i];
2067                 a_band = is_channel_a_band(ch_info);
2068
2069                 /* find minimum power of all user and regulatory constraints
2070                  *    (does not consider h/w clipping limitations) */
2071                 max_power = iwl3945_hw_reg_get_ch_txpower_limit(ch_info);
2072                 max_power = min(power, max_power);
2073                 if (max_power != ch_info->curr_txpow) {
2074                         ch_info->curr_txpow = max_power;
2075
2076                         /* this considers the h/w clipping limitations */
2077                         iwl3945_hw_reg_set_new_power(priv, ch_info);
2078                 }
2079         }
2080
2081         /* update txpower settings for all channels,
2082          *   send to NIC if associated. */
2083         is_temp_calib_needed(priv);
2084         iwl3945_hw_reg_comp_txpower_temp(priv);
2085
2086         return 0;
2087 }
2088
2089 /* will add 3945 channel switch cmd handling later */
2090 int iwl3945_hw_channel_switch(struct iwl3945_priv *priv, u16 channel)
2091 {
2092         return 0;
2093 }
2094
2095 /**
2096  * iwl3945_reg_txpower_periodic -  called when time to check our temperature.
2097  *
2098  * -- reset periodic timer
2099  * -- see if temp has changed enough to warrant re-calibration ... if so:
2100  *     -- correct coeffs for temp (can reset temp timer)
2101  *     -- save this temp as "last",
2102  *     -- send new set of gain settings to NIC
2103  * NOTE:  This should continue working, even when we're not associated,
2104  *   so we can keep our internal table of scan powers current. */
2105 void iwl3945_reg_txpower_periodic(struct iwl3945_priv *priv)
2106 {
2107         /* This will kick in the "brute force"
2108          * iwl3945_hw_reg_comp_txpower_temp() below */
2109         if (!is_temp_calib_needed(priv))
2110                 goto reschedule;
2111
2112         /* Set up a new set of temp-adjusted TxPowers, send to NIC.
2113          * This is based *only* on current temperature,
2114          * ignoring any previous power measurements */
2115         iwl3945_hw_reg_comp_txpower_temp(priv);
2116
2117  reschedule:
2118         queue_delayed_work(priv->workqueue,
2119                            &priv->thermal_periodic, REG_RECALIB_PERIOD * HZ);
2120 }
2121
2122 static void iwl3945_bg_reg_txpower_periodic(struct work_struct *work)
2123 {
2124         struct iwl3945_priv *priv = container_of(work, struct iwl3945_priv,
2125                                              thermal_periodic.work);
2126
2127         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2128                 return;
2129
2130         mutex_lock(&priv->mutex);
2131         iwl3945_reg_txpower_periodic(priv);
2132         mutex_unlock(&priv->mutex);
2133 }
2134
2135 /**
2136  * iwl3945_hw_reg_get_ch_grp_index - find the channel-group index (0-4)
2137  *                                 for the channel.
2138  *
2139  * This function is used when initializing channel-info structs.
2140  *
2141  * NOTE: These channel groups do *NOT* match the bands above!
2142  *       These channel groups are based on factory-tested channels;
2143  *       on A-band, EEPROM's "group frequency" entries represent the top
2144  *       channel in each group 1-4.  Group 5 All B/G channels are in group 0.
2145  */
2146 static u16 iwl3945_hw_reg_get_ch_grp_index(struct iwl3945_priv *priv,
2147                                        const struct iwl3945_channel_info *ch_info)
2148 {
2149         struct iwl3945_eeprom_txpower_group *ch_grp = &priv->eeprom.groups[0];
2150         u8 group;
2151         u16 group_index = 0;    /* based on factory calib frequencies */
2152         u8 grp_channel;
2153
2154         /* Find the group index for the channel ... don't use index 1(?) */
2155         if (is_channel_a_band(ch_info)) {
2156                 for (group = 1; group < 5; group++) {
2157                         grp_channel = ch_grp[group].group_channel;
2158                         if (ch_info->channel <= grp_channel) {
2159                                 group_index = group;
2160                                 break;
2161                         }
2162                 }
2163                 /* group 4 has a few channels *above* its factory cal freq */
2164                 if (group == 5)
2165                         group_index = 4;
2166         } else
2167                 group_index = 0;        /* 2.4 GHz, group 0 */
2168
2169         IWL_DEBUG_POWER("Chnl %d mapped to grp %d\n", ch_info->channel,
2170                         group_index);
2171         return group_index;
2172 }
2173
2174 /**
2175  * iwl3945_hw_reg_get_matched_power_index - Interpolate to get nominal index
2176  *
2177  * Interpolate to get nominal (i.e. at factory calibration temperature) index
2178  *   into radio/DSP gain settings table for requested power.
2179  */
2180 static int iwl3945_hw_reg_get_matched_power_index(struct iwl3945_priv *priv,
2181                                        s8 requested_power,
2182                                        s32 setting_index, s32 *new_index)
2183 {
2184         const struct iwl3945_eeprom_txpower_group *chnl_grp = NULL;
2185         s32 index0, index1;
2186         s32 power = 2 * requested_power;
2187         s32 i;
2188         const struct iwl3945_eeprom_txpower_sample *samples;
2189         s32 gains0, gains1;
2190         s32 res;
2191         s32 denominator;
2192
2193         chnl_grp = &priv->eeprom.groups[setting_index];
2194         samples = chnl_grp->samples;
2195         for (i = 0; i < 5; i++) {
2196                 if (power == samples[i].power) {
2197                         *new_index = samples[i].gain_index;
2198                         return 0;
2199                 }
2200         }
2201
2202         if (power > samples[1].power) {
2203                 index0 = 0;
2204                 index1 = 1;
2205         } else if (power > samples[2].power) {
2206                 index0 = 1;
2207                 index1 = 2;
2208         } else if (power > samples[3].power) {
2209                 index0 = 2;
2210                 index1 = 3;
2211         } else {
2212                 index0 = 3;
2213                 index1 = 4;
2214         }
2215
2216         denominator = (s32) samples[index1].power - (s32) samples[index0].power;
2217         if (denominator == 0)
2218                 return -EINVAL;
2219         gains0 = (s32) samples[index0].gain_index * (1 << 19);
2220         gains1 = (s32) samples[index1].gain_index * (1 << 19);
2221         res = gains0 + (gains1 - gains0) *
2222             ((s32) power - (s32) samples[index0].power) / denominator +
2223             (1 << 18);
2224         *new_index = res >> 19;
2225         return 0;
2226 }
2227
2228 static void iwl3945_hw_reg_init_channel_groups(struct iwl3945_priv *priv)
2229 {
2230         u32 i;
2231         s32 rate_index;
2232         const struct iwl3945_eeprom_txpower_group *group;
2233
2234         IWL_DEBUG_POWER("Initializing factory calib info from EEPROM\n");
2235
2236         for (i = 0; i < IWL_NUM_TX_CALIB_GROUPS; i++) {
2237                 s8 *clip_pwrs;  /* table of power levels for each rate */
2238                 s8 satur_pwr;   /* saturation power for each chnl group */
2239                 group = &priv->eeprom.groups[i];
2240
2241                 /* sanity check on factory saturation power value */
2242                 if (group->saturation_power < 40) {
2243                         IWL_WARNING("Error: saturation power is %d, "
2244                                     "less than minimum expected 40\n",
2245                                     group->saturation_power);
2246                         return;
2247                 }
2248
2249                 /*
2250                  * Derive requested power levels for each rate, based on
2251                  *   hardware capabilities (saturation power for band).
2252                  * Basic value is 3dB down from saturation, with further
2253                  *   power reductions for highest 3 data rates.  These
2254                  *   backoffs provide headroom for high rate modulation
2255                  *   power peaks, without too much distortion (clipping).
2256                  */
2257                 /* we'll fill in this array with h/w max power levels */
2258                 clip_pwrs = (s8 *) priv->clip_groups[i].clip_powers;
2259
2260                 /* divide factory saturation power by 2 to find -3dB level */
2261                 satur_pwr = (s8) (group->saturation_power >> 1);
2262
2263                 /* fill in channel group's nominal powers for each rate */
2264                 for (rate_index = 0;
2265                      rate_index < IWL_RATE_COUNT; rate_index++, clip_pwrs++) {
2266                         switch (rate_index) {
2267                         case IWL_RATE_36M_INDEX_TABLE:
2268                                 if (i == 0)     /* B/G */
2269                                         *clip_pwrs = satur_pwr;
2270                                 else    /* A */
2271                                         *clip_pwrs = satur_pwr - 5;
2272                                 break;
2273                         case IWL_RATE_48M_INDEX_TABLE:
2274                                 if (i == 0)
2275                                         *clip_pwrs = satur_pwr - 7;
2276                                 else
2277                                         *clip_pwrs = satur_pwr - 10;
2278                                 break;
2279                         case IWL_RATE_54M_INDEX_TABLE:
2280                                 if (i == 0)
2281                                         *clip_pwrs = satur_pwr - 9;
2282                                 else
2283                                         *clip_pwrs = satur_pwr - 12;
2284                                 break;
2285                         default:
2286                                 *clip_pwrs = satur_pwr;
2287                                 break;
2288                         }
2289                 }
2290         }
2291 }
2292
2293 /**
2294  * iwl3945_txpower_set_from_eeprom - Set channel power info based on EEPROM
2295  *
2296  * Second pass (during init) to set up priv->channel_info
2297  *
2298  * Set up Tx-power settings in our channel info database for each VALID
2299  * (for this geo/SKU) channel, at all Tx data rates, based on eeprom values
2300  * and current temperature.
2301  *
2302  * Since this is based on current temperature (at init time), these values may
2303  * not be valid for very long, but it gives us a starting/default point,
2304  * and allows us to active (i.e. using Tx) scan.
2305  *
2306  * This does *not* write values to NIC, just sets up our internal table.
2307  */
2308 int iwl3945_txpower_set_from_eeprom(struct iwl3945_priv *priv)
2309 {
2310         struct iwl3945_channel_info *ch_info = NULL;
2311         struct iwl3945_channel_power_info *pwr_info;
2312         int delta_index;
2313         u8 rate_index;
2314         u8 scan_tbl_index;
2315         const s8 *clip_pwrs;    /* array of power levels for each rate */
2316         u8 gain, dsp_atten;
2317         s8 power;
2318         u8 pwr_index, base_pwr_index, a_band;
2319         u8 i;
2320         int temperature;
2321
2322         /* save temperature reference,
2323          *   so we can determine next time to calibrate */
2324         temperature = iwl3945_hw_reg_txpower_get_temperature(priv);
2325         priv->last_temperature = temperature;
2326
2327         iwl3945_hw_reg_init_channel_groups(priv);
2328
2329         /* initialize Tx power info for each and every channel, 2.4 and 5.x */
2330         for (i = 0, ch_info = priv->channel_info; i < priv->channel_count;
2331              i++, ch_info++) {
2332                 a_band = is_channel_a_band(ch_info);
2333                 if (!is_channel_valid(ch_info))
2334                         continue;
2335
2336                 /* find this channel's channel group (*not* "band") index */
2337                 ch_info->group_index =
2338                         iwl3945_hw_reg_get_ch_grp_index(priv, ch_info);
2339
2340                 /* Get this chnlgrp's rate->max/clip-powers table */
2341                 clip_pwrs = priv->clip_groups[ch_info->group_index].clip_powers;
2342
2343                 /* calculate power index *adjustment* value according to
2344                  *  diff between current temperature and factory temperature */
2345                 delta_index = iwl3945_hw_reg_adjust_power_by_temp(temperature,
2346                                 priv->eeprom.groups[ch_info->group_index].
2347                                 temperature);
2348
2349                 IWL_DEBUG_POWER("Delta index for channel %d: %d [%d]\n",
2350                                 ch_info->channel, delta_index, temperature +
2351                                 IWL_TEMP_CONVERT);
2352
2353                 /* set tx power value for all OFDM rates */
2354                 for (rate_index = 0; rate_index < IWL_OFDM_RATES;
2355                      rate_index++) {
2356                         s32 power_idx;
2357                         int rc;
2358
2359                         /* use channel group's clip-power table,
2360                          *   but don't exceed channel's max power */
2361                         s8 pwr = min(ch_info->max_power_avg,
2362                                      clip_pwrs[rate_index]);
2363
2364                         pwr_info = &ch_info->power_info[rate_index];
2365
2366                         /* get base (i.e. at factory-measured temperature)
2367                          *    power table index for this rate's power */
2368                         rc = iwl3945_hw_reg_get_matched_power_index(priv, pwr,
2369                                                          ch_info->group_index,
2370                                                          &power_idx);
2371                         if (rc) {
2372                                 IWL_ERROR("Invalid power index\n");
2373                                 return rc;
2374                         }
2375                         pwr_info->base_power_index = (u8) power_idx;
2376
2377                         /* temperature compensate */
2378                         power_idx += delta_index;
2379
2380                         /* stay within range of gain table */
2381                         power_idx = iwl3945_hw_reg_fix_power_index(power_idx);
2382
2383                         /* fill 1 OFDM rate's iwl3945_channel_power_info struct */
2384                         pwr_info->requested_power = pwr;
2385                         pwr_info->power_table_index = (u8) power_idx;
2386                         pwr_info->tpc.tx_gain =
2387                             power_gain_table[a_band][power_idx].tx_gain;
2388                         pwr_info->tpc.dsp_atten =
2389                             power_gain_table[a_band][power_idx].dsp_atten;
2390                 }
2391
2392                 /* set tx power for CCK rates, based on OFDM 12 Mbit settings*/
2393                 pwr_info = &ch_info->power_info[IWL_RATE_12M_INDEX_TABLE];
2394                 power = pwr_info->requested_power +
2395                         IWL_CCK_FROM_OFDM_POWER_DIFF;
2396                 pwr_index = pwr_info->power_table_index +
2397                         IWL_CCK_FROM_OFDM_INDEX_DIFF;
2398                 base_pwr_index = pwr_info->base_power_index +
2399                         IWL_CCK_FROM_OFDM_INDEX_DIFF;
2400
2401                 /* stay within table range */
2402                 pwr_index = iwl3945_hw_reg_fix_power_index(pwr_index);
2403                 gain = power_gain_table[a_band][pwr_index].tx_gain;
2404                 dsp_atten = power_gain_table[a_band][pwr_index].dsp_atten;
2405
2406                 /* fill each CCK rate's iwl3945_channel_power_info structure
2407                  * NOTE:  All CCK-rate Txpwrs are the same for a given chnl!
2408                  * NOTE:  CCK rates start at end of OFDM rates! */
2409                 for (rate_index = 0;
2410                      rate_index < IWL_CCK_RATES; rate_index++) {
2411                         pwr_info = &ch_info->power_info[rate_index+IWL_OFDM_RATES];
2412                         pwr_info->requested_power = power;
2413                         pwr_info->power_table_index = pwr_index;
2414                         pwr_info->base_power_index = base_pwr_index;
2415                         pwr_info->tpc.tx_gain = gain;
2416                         pwr_info->tpc.dsp_atten = dsp_atten;
2417                 }
2418
2419                 /* set scan tx power, 1Mbit for CCK, 6Mbit for OFDM */
2420                 for (scan_tbl_index = 0;
2421                      scan_tbl_index < IWL_NUM_SCAN_RATES; scan_tbl_index++) {
2422                         s32 actual_index = (scan_tbl_index == 0) ?
2423                                 IWL_RATE_1M_INDEX_TABLE : IWL_RATE_6M_INDEX_TABLE;
2424                         iwl3945_hw_reg_set_scan_power(priv, scan_tbl_index,
2425                                 actual_index, clip_pwrs, ch_info, a_band);
2426                 }
2427         }
2428
2429         return 0;
2430 }
2431
2432 int iwl3945_hw_rxq_stop(struct iwl3945_priv *priv)
2433 {
2434         int rc;
2435         unsigned long flags;
2436
2437         spin_lock_irqsave(&priv->lock, flags);
2438         rc = iwl3945_grab_nic_access(priv);
2439         if (rc) {
2440                 spin_unlock_irqrestore(&priv->lock, flags);
2441                 return rc;
2442         }
2443
2444         iwl3945_write_direct32(priv, FH_RCSR_CONFIG(0), 0);
2445         rc = iwl3945_poll_direct_bit(priv, FH_RSSR_STATUS, (1 << 24), 1000);
2446         if (rc < 0)
2447                 IWL_ERROR("Can't stop Rx DMA.\n");
2448
2449         iwl3945_release_nic_access(priv);
2450         spin_unlock_irqrestore(&priv->lock, flags);
2451
2452         return 0;
2453 }
2454
2455 int iwl3945_hw_tx_queue_init(struct iwl3945_priv *priv, struct iwl3945_tx_queue *txq)
2456 {
2457         int rc;
2458         unsigned long flags;
2459         int txq_id = txq->q.id;
2460
2461         struct iwl3945_shared *shared_data = priv->hw_setting.shared_virt;
2462
2463         shared_data->tx_base_ptr[txq_id] = cpu_to_le32((u32)txq->q.dma_addr);
2464
2465         spin_lock_irqsave(&priv->lock, flags);
2466         rc = iwl3945_grab_nic_access(priv);
2467         if (rc) {
2468                 spin_unlock_irqrestore(&priv->lock, flags);
2469                 return rc;
2470         }
2471         iwl3945_write_direct32(priv, FH_CBCC_CTRL(txq_id), 0);
2472         iwl3945_write_direct32(priv, FH_CBCC_BASE(txq_id), 0);
2473
2474         iwl3945_write_direct32(priv, FH_TCSR_CONFIG(txq_id),
2475                 ALM_FH_TCSR_TX_CONFIG_REG_VAL_CIRQ_RTC_NOINT |
2476                 ALM_FH_TCSR_TX_CONFIG_REG_VAL_MSG_MODE_TXF |
2477                 ALM_FH_TCSR_TX_CONFIG_REG_VAL_CIRQ_HOST_IFTFD |
2478                 ALM_FH_TCSR_TX_CONFIG_REG_VAL_DMA_CREDIT_ENABLE_VAL |
2479                 ALM_FH_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_ENABLE);
2480         iwl3945_release_nic_access(priv);
2481
2482         /* fake read to flush all prev. writes */
2483         iwl3945_read32(priv, FH_TSSR_CBB_BASE);
2484         spin_unlock_irqrestore(&priv->lock, flags);
2485
2486         return 0;
2487 }
2488
2489 int iwl3945_hw_get_rx_read(struct iwl3945_priv *priv)
2490 {
2491         struct iwl3945_shared *shared_data = priv->hw_setting.shared_virt;
2492
2493         return le32_to_cpu(shared_data->rx_read_ptr[0]);
2494 }
2495
2496 /**
2497  * iwl3945_init_hw_rate_table - Initialize the hardware rate fallback table
2498  */
2499 int iwl3945_init_hw_rate_table(struct iwl3945_priv *priv)
2500 {
2501         int rc, i, index, prev_index;
2502         struct iwl3945_rate_scaling_cmd rate_cmd = {
2503                 .reserved = {0, 0, 0},
2504         };
2505         struct iwl3945_rate_scaling_info *table = rate_cmd.table;
2506
2507         for (i = 0; i < ARRAY_SIZE(iwl3945_rates); i++) {
2508                 index = iwl3945_rates[i].table_rs_index;
2509
2510                 table[index].rate_n_flags =
2511                         iwl3945_hw_set_rate_n_flags(iwl3945_rates[i].plcp, 0);
2512                 table[index].try_cnt = priv->retry_rate;
2513                 prev_index = iwl3945_get_prev_ieee_rate(i);
2514                 table[index].next_rate_index = iwl3945_rates[prev_index].table_rs_index;
2515         }
2516
2517         switch (priv->band) {
2518         case IEEE80211_BAND_5GHZ:
2519                 IWL_DEBUG_RATE("Select A mode rate scale\n");
2520                 /* If one of the following CCK rates is used,
2521                  * have it fall back to the 6M OFDM rate */
2522                 for (i = IWL_RATE_1M_INDEX_TABLE; i <= IWL_RATE_11M_INDEX_TABLE; i++)
2523                         table[i].next_rate_index = iwl3945_rates[IWL_FIRST_OFDM_RATE].table_rs_index;
2524
2525                 /* Don't fall back to CCK rates */
2526                 table[IWL_RATE_12M_INDEX_TABLE].next_rate_index = IWL_RATE_9M_INDEX_TABLE;
2527
2528                 /* Don't drop out of OFDM rates */
2529                 table[IWL_RATE_6M_INDEX_TABLE].next_rate_index =
2530                     iwl3945_rates[IWL_FIRST_OFDM_RATE].table_rs_index;
2531                 break;
2532
2533         case IEEE80211_BAND_2GHZ:
2534                 IWL_DEBUG_RATE("Select B/G mode rate scale\n");
2535                 /* If an OFDM rate is used, have it fall back to the
2536                  * 1M CCK rates */
2537                 for (i = IWL_RATE_6M_INDEX_TABLE; i <= IWL_RATE_54M_INDEX_TABLE; i++)
2538                         table[i].next_rate_index = iwl3945_rates[IWL_FIRST_CCK_RATE].table_rs_index;
2539
2540                 /* CCK shouldn't fall back to OFDM... */
2541                 table[IWL_RATE_11M_INDEX_TABLE].next_rate_index = IWL_RATE_5M_INDEX_TABLE;
2542                 break;
2543
2544         default:
2545                 WARN_ON(1);
2546                 break;
2547         }
2548
2549         /* Update the rate scaling for control frame Tx */
2550         rate_cmd.table_id = 0;
2551         rc = iwl3945_send_cmd_pdu(priv, REPLY_RATE_SCALE, sizeof(rate_cmd),
2552                               &rate_cmd);
2553         if (rc)
2554                 return rc;
2555
2556         /* Update the rate scaling for data frame Tx */
2557         rate_cmd.table_id = 1;
2558         return iwl3945_send_cmd_pdu(priv, REPLY_RATE_SCALE, sizeof(rate_cmd),
2559                                 &rate_cmd);
2560 }
2561
2562 /* Called when initializing driver */
2563 int iwl3945_hw_set_hw_setting(struct iwl3945_priv *priv)
2564 {
2565         memset((void *)&priv->hw_setting, 0,
2566                sizeof(struct iwl3945_driver_hw_info));
2567
2568         priv->hw_setting.shared_virt =
2569             pci_alloc_consistent(priv->pci_dev,
2570                                  sizeof(struct iwl3945_shared),
2571                                  &priv->hw_setting.shared_phys);
2572
2573         if (!priv->hw_setting.shared_virt) {
2574                 IWL_ERROR("failed to allocate pci memory\n");
2575                 mutex_unlock(&priv->mutex);
2576                 return -ENOMEM;
2577         }
2578
2579         priv->hw_setting.rx_buf_size = IWL_RX_BUF_SIZE;
2580         priv->hw_setting.max_pkt_size = 2342;
2581         priv->hw_setting.tx_cmd_len = sizeof(struct iwl3945_tx_cmd);
2582         priv->hw_setting.max_rxq_size = RX_QUEUE_SIZE;
2583         priv->hw_setting.max_rxq_log = RX_QUEUE_SIZE_LOG;
2584         priv->hw_setting.max_stations = IWL3945_STATION_COUNT;
2585         priv->hw_setting.bcast_sta_id = IWL3945_BROADCAST_ID;
2586
2587         priv->hw_setting.tx_ant_num = 2;
2588         return 0;
2589 }
2590
2591 unsigned int iwl3945_hw_get_beacon_cmd(struct iwl3945_priv *priv,
2592                           struct iwl3945_frame *frame, u8 rate)
2593 {
2594         struct iwl3945_tx_beacon_cmd *tx_beacon_cmd;
2595         unsigned int frame_size;
2596
2597         tx_beacon_cmd = (struct iwl3945_tx_beacon_cmd *)&frame->u;
2598         memset(tx_beacon_cmd, 0, sizeof(*tx_beacon_cmd));
2599
2600         tx_beacon_cmd->tx.sta_id = priv->hw_setting.bcast_sta_id;
2601         tx_beacon_cmd->tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2602
2603         frame_size = iwl3945_fill_beacon_frame(priv,
2604                                 tx_beacon_cmd->frame,
2605                                 iwl3945_broadcast_addr,
2606                                 sizeof(frame->u) - sizeof(*tx_beacon_cmd));
2607
2608         BUG_ON(frame_size > MAX_MPDU_SIZE);
2609         tx_beacon_cmd->tx.len = cpu_to_le16((u16)frame_size);
2610
2611         tx_beacon_cmd->tx.rate = rate;
2612         tx_beacon_cmd->tx.tx_flags = (TX_CMD_FLG_SEQ_CTL_MSK |
2613                                       TX_CMD_FLG_TSF_MSK);
2614
2615         /* supp_rates[0] == OFDM start at IWL_FIRST_OFDM_RATE*/
2616         tx_beacon_cmd->tx.supp_rates[0] =
2617                 (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
2618
2619         tx_beacon_cmd->tx.supp_rates[1] =
2620                 (IWL_CCK_BASIC_RATES_MASK & 0xF);
2621
2622         return (sizeof(struct iwl3945_tx_beacon_cmd) + frame_size);
2623 }
2624
2625 void iwl3945_hw_rx_handler_setup(struct iwl3945_priv *priv)
2626 {
2627         priv->rx_handlers[REPLY_TX] = iwl3945_rx_reply_tx;
2628         priv->rx_handlers[REPLY_3945_RX] = iwl3945_rx_reply_rx;
2629 }
2630
2631 void iwl3945_hw_setup_deferred_work(struct iwl3945_priv *priv)
2632 {
2633         INIT_DELAYED_WORK(&priv->thermal_periodic,
2634                           iwl3945_bg_reg_txpower_periodic);
2635 }
2636
2637 void iwl3945_hw_cancel_deferred_work(struct iwl3945_priv *priv)
2638 {
2639         cancel_delayed_work(&priv->thermal_periodic);
2640 }
2641
2642 static struct iwl_3945_cfg iwl3945_bg_cfg = {
2643         .name = "3945BG",
2644         .fw_name = "iwlwifi-3945" IWL3945_UCODE_API ".ucode",
2645         .sku = IWL_SKU_G,
2646 };
2647
2648 static struct iwl_3945_cfg iwl3945_abg_cfg = {
2649         .name = "3945ABG",
2650         .fw_name = "iwlwifi-3945" IWL3945_UCODE_API ".ucode",
2651         .sku = IWL_SKU_A|IWL_SKU_G,
2652 };
2653
2654 struct pci_device_id iwl3945_hw_card_ids[] = {
2655         {IWL_PCI_DEVICE(0x4222, 0x1005, iwl3945_bg_cfg)},
2656         {IWL_PCI_DEVICE(0x4222, 0x1034, iwl3945_bg_cfg)},
2657         {IWL_PCI_DEVICE(0x4222, 0x1044, iwl3945_bg_cfg)},
2658         {IWL_PCI_DEVICE(0x4227, 0x1014, iwl3945_bg_cfg)},
2659         {IWL_PCI_DEVICE(0x4222, PCI_ANY_ID, iwl3945_abg_cfg)},
2660         {IWL_PCI_DEVICE(0x4227, PCI_ANY_ID, iwl3945_abg_cfg)},
2661         {0}
2662 };
2663
2664 MODULE_DEVICE_TABLE(pci, iwl3945_hw_card_ids);