git.oblomov.eu Git - linux-2.6/blob - drivers/net/wireless/iwlwifi/iwl-3945.c

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2008 Intel Corporation. All rights reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms of version 2 of the GNU General Public License as
   7  * published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  12  * more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along with
  15  * this program; if not, write to the Free Software Foundation, Inc.,
  16  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
  17  *
  18  * The full GNU General Public License is included in this distribution in the
  19  * file called LICENSE.
  20  *
  21  * Contact Information:
  22  * James P. Ketrenos <ipw2100-admin@linux.intel.com>
  23  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  24  *
  25  *****************************************************************************/
  26
  27 #include <linux/kernel.h>
  28 #include <linux/module.h>
  29 #include <linux/init.h>
  30 #include <linux/pci.h>
  31 #include <linux/dma-mapping.h>
  32 #include <linux/delay.h>
  33 #include <linux/skbuff.h>
  34 #include <linux/netdevice.h>
  35 #include <linux/wireless.h>
  36 #include <linux/firmware.h>
  37 #include <linux/etherdevice.h>
  38 #include <asm/unaligned.h>
  39 #include <net/mac80211.h>
  40
  41 #include "iwl-3945-core.h"
  42 #include "iwl-3945.h"
  43 #include "iwl-helpers.h"
  44 #include "iwl-3945-rs.h"
  45
  46 #define IWL_DECLARE_RATE_INFO(r, ip, in, rp, rn, pp, np)    \
  47         [IWL_RATE_##r##M_INDEX] = { IWL_RATE_##r##M_PLCP,   \
  48                                     IWL_RATE_##r##M_IEEE,   \
  49                                     IWL_RATE_##ip##M_INDEX, \
  50                                     IWL_RATE_##in##M_INDEX, \
  51                                     IWL_RATE_##rp##M_INDEX, \
  52                                     IWL_RATE_##rn##M_INDEX, \
  53                                     IWL_RATE_##pp##M_INDEX, \
  54                                     IWL_RATE_##np##M_INDEX, \
  55                                     IWL_RATE_##r##M_INDEX_TABLE, \
  56                                     IWL_RATE_##ip##M_INDEX_TABLE }
  57
  58 /*
  59  * Parameter order:
  60  *   rate, prev rate, next rate, prev tgg rate, next tgg rate
  61  *
  62  * If there isn't a valid next or previous rate then INV is used which
  63  * maps to IWL_RATE_INVALID
  64  *
  65  */
  66 const struct iwl3945_rate_info iwl3945_rates[IWL_RATE_COUNT] = {
  67         IWL_DECLARE_RATE_INFO(1, INV, 2, INV, 2, INV, 2),    /*  1mbps */
  68         IWL_DECLARE_RATE_INFO(2, 1, 5, 1, 5, 1, 5),          /*  2mbps */
  69         IWL_DECLARE_RATE_INFO(5, 2, 6, 2, 11, 2, 11),        /*5.5mbps */
  70         IWL_DECLARE_RATE_INFO(11, 9, 12, 5, 12, 5, 18),      /* 11mbps */
  71         IWL_DECLARE_RATE_INFO(6, 5, 9, 5, 11, 5, 11),        /*  6mbps */
  72         IWL_DECLARE_RATE_INFO(9, 6, 11, 5, 11, 5, 11),       /*  9mbps */
  73         IWL_DECLARE_RATE_INFO(12, 11, 18, 11, 18, 11, 18),   /* 12mbps */
  74         IWL_DECLARE_RATE_INFO(18, 12, 24, 12, 24, 11, 24),   /* 18mbps */
  75         IWL_DECLARE_RATE_INFO(24, 18, 36, 18, 36, 18, 36),   /* 24mbps */
  76         IWL_DECLARE_RATE_INFO(36, 24, 48, 24, 48, 24, 48),   /* 36mbps */
  77         IWL_DECLARE_RATE_INFO(48, 36, 54, 36, 54, 36, 54),   /* 48mbps */
  78         IWL_DECLARE_RATE_INFO(54, 48, INV, 48, INV, 48, INV),/* 54mbps */
  79 };
  80
  81 /* 1 = enable the iwl3945_disable_events() function */
  82 #define IWL_EVT_DISABLE (0)
  83 #define IWL_EVT_DISABLE_SIZE (1532/32)
  84
  85 /**
  86  * iwl3945_disable_events - Disable selected events in uCode event log
  87  *
  88  * Disable an event by writing "1"s into "disable"
  89  *   bitmap in SRAM.  Bit position corresponds to Event # (id/type).
  90  *   Default values of 0 enable uCode events to be logged.
  91  * Use for only special debugging.  This function is just a placeholder as-is,
  92  *   you'll need to provide the special bits! ...
  93  *   ... and set IWL_EVT_DISABLE to 1. */
  94 void iwl3945_disable_events(struct iwl3945_priv *priv)
  95 {
  96         int ret;
  97         int i;
  98         u32 base;               /* SRAM address of event log header */
  99         u32 disable_ptr;        /* SRAM address of event-disable bitmap array */
 100         u32 array_size;         /* # of u32 entries in array */
 101         u32 evt_disable[IWL_EVT_DISABLE_SIZE] = {
 102                 0x00000000,     /*   31 -    0  Event id numbers */
 103                 0x00000000,     /*   63 -   32 */
 104                 0x00000000,     /*   95 -   64 */
 105                 0x00000000,     /*  127 -   96 */
 106                 0x00000000,     /*  159 -  128 */
 107                 0x00000000,     /*  191 -  160 */
 108                 0x00000000,     /*  223 -  192 */
 109                 0x00000000,     /*  255 -  224 */
 110                 0x00000000,     /*  287 -  256 */
 111                 0x00000000,     /*  319 -  288 */
 112                 0x00000000,     /*  351 -  320 */
 113                 0x00000000,     /*  383 -  352 */
 114                 0x00000000,     /*  415 -  384 */
 115                 0x00000000,     /*  447 -  416 */
 116                 0x00000000,     /*  479 -  448 */
 117                 0x00000000,     /*  511 -  480 */
 118                 0x00000000,     /*  543 -  512 */
 119                 0x00000000,     /*  575 -  544 */
 120                 0x00000000,     /*  607 -  576 */
 121                 0x00000000,     /*  639 -  608 */
 122                 0x00000000,     /*  671 -  640 */
 123                 0x00000000,     /*  703 -  672 */
 124                 0x00000000,     /*  735 -  704 */
 125                 0x00000000,     /*  767 -  736 */
 126                 0x00000000,     /*  799 -  768 */
 127                 0x00000000,     /*  831 -  800 */
 128                 0x00000000,     /*  863 -  832 */
 129                 0x00000000,     /*  895 -  864 */
 130                 0x00000000,     /*  927 -  896 */
 131                 0x00000000,     /*  959 -  928 */
 132                 0x00000000,     /*  991 -  960 */
 133                 0x00000000,     /* 1023 -  992 */
 134                 0x00000000,     /* 1055 - 1024 */
 135                 0x00000000,     /* 1087 - 1056 */
 136                 0x00000000,     /* 1119 - 1088 */
 137                 0x00000000,     /* 1151 - 1120 */
 138                 0x00000000,     /* 1183 - 1152 */
 139                 0x00000000,     /* 1215 - 1184 */
 140                 0x00000000,     /* 1247 - 1216 */
 141                 0x00000000,     /* 1279 - 1248 */
 142                 0x00000000,     /* 1311 - 1280 */
 143                 0x00000000,     /* 1343 - 1312 */
 144                 0x00000000,     /* 1375 - 1344 */
 145                 0x00000000,     /* 1407 - 1376 */
 146                 0x00000000,     /* 1439 - 1408 */
 147                 0x00000000,     /* 1471 - 1440 */
 148                 0x00000000,     /* 1503 - 1472 */
 149         };
 150
 151         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
 152         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
 153                 IWL_ERROR("Invalid event log pointer 0x%08X\n", base);
 154                 return;
 155         }
 156
 157         ret = iwl3945_grab_nic_access(priv);
 158         if (ret) {
 159                 IWL_WARNING("Can not read from adapter at this time.\n");
 160                 return;
 161         }
 162
 163         disable_ptr = iwl3945_read_targ_mem(priv, base + (4 * sizeof(u32)));
 164         array_size = iwl3945_read_targ_mem(priv, base + (5 * sizeof(u32)));
 165         iwl3945_release_nic_access(priv);
 166
 167         if (IWL_EVT_DISABLE && (array_size == IWL_EVT_DISABLE_SIZE)) {
 168                 IWL_DEBUG_INFO("Disabling selected uCode log events at 0x%x\n",
 169                                disable_ptr);
 170                 ret = iwl3945_grab_nic_access(priv);
 171                 for (i = 0; i < IWL_EVT_DISABLE_SIZE; i++)
 172                         iwl3945_write_targ_mem(priv,
 173                                            disable_ptr + (i * sizeof(u32)),
 174                                            evt_disable[i]);
 175
 176                 iwl3945_release_nic_access(priv);
 177         } else {
 178                 IWL_DEBUG_INFO("Selected uCode log events may be disabled\n");
 179                 IWL_DEBUG_INFO("  by writing \"1\"s into disable bitmap\n");
 180                 IWL_DEBUG_INFO("  in SRAM at 0x%x, size %d u32s\n",
 181                                disable_ptr, array_size);
 182         }
 183
 184 }
 185
 186 static int iwl3945_hwrate_to_plcp_idx(u8 plcp)
 187 {
 188         int idx;
 189
 190         for (idx = 0; idx < IWL_RATE_COUNT; idx++)
 191                 if (iwl3945_rates[idx].plcp == plcp)
 192                         return idx;
 193         return -1;
 194 }
 195
 196 /**
 197  * iwl3945_get_antenna_flags - Get antenna flags for RXON command
 198  * @priv: eeprom and antenna fields are used to determine antenna flags
 199  *
 200  * priv->eeprom  is used to determine if antenna AUX/MAIN are reversed
 201  * priv->antenna specifies the antenna diversity mode:
 202  *
 203  * IWL_ANTENNA_DIVERISTY - NIC selects best antenna by itself
 204  * IWL_ANTENNA_MAIN      - Force MAIN antenna
 205  * IWL_ANTENNA_AUX       - Force AUX antenna
 206  */
 207 __le32 iwl3945_get_antenna_flags(const struct iwl3945_priv *priv)
 208 {
 209         switch (priv->antenna) {
 210         case IWL_ANTENNA_DIVERSITY:
 211                 return 0;
 212
 213         case IWL_ANTENNA_MAIN:
 214                 if (priv->eeprom.antenna_switch_type)
 215                         return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_B_MSK;
 216                 return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_A_MSK;
 217
 218         case IWL_ANTENNA_AUX:
 219                 if (priv->eeprom.antenna_switch_type)
 220                         return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_A_MSK;
 221                 return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_B_MSK;
 222         }
 223
 224         /* bad antenna selector value */
 225         IWL_ERROR("Bad antenna selector value (0x%x)\n", priv->antenna);
 226         return 0;               /* "diversity" is default if error */
 227 }
 228
 229 #ifdef CONFIG_IWL3945_DEBUG
 230 #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
 231
 232 static const char *iwl3945_get_tx_fail_reason(u32 status)
 233 {
 234         switch (status & TX_STATUS_MSK) {
 235         case TX_STATUS_SUCCESS:
 236                 return "SUCCESS";
 237                 TX_STATUS_ENTRY(SHORT_LIMIT);
 238                 TX_STATUS_ENTRY(LONG_LIMIT);
 239                 TX_STATUS_ENTRY(FIFO_UNDERRUN);
 240                 TX_STATUS_ENTRY(MGMNT_ABORT);
 241                 TX_STATUS_ENTRY(NEXT_FRAG);
 242                 TX_STATUS_ENTRY(LIFE_EXPIRE);
 243                 TX_STATUS_ENTRY(DEST_PS);
 244                 TX_STATUS_ENTRY(ABORTED);
 245                 TX_STATUS_ENTRY(BT_RETRY);
 246                 TX_STATUS_ENTRY(STA_INVALID);
 247                 TX_STATUS_ENTRY(FRAG_DROPPED);
 248                 TX_STATUS_ENTRY(TID_DISABLE);
 249                 TX_STATUS_ENTRY(FRAME_FLUSHED);
 250                 TX_STATUS_ENTRY(INSUFFICIENT_CF_POLL);
 251                 TX_STATUS_ENTRY(TX_LOCKED);
 252                 TX_STATUS_ENTRY(NO_BEACON_ON_RADAR);
 253         }
 254
 255         return "UNKNOWN";
 256 }
 257 #else
 258 static inline const char *iwl3945_get_tx_fail_reason(u32 status)
 259 {
 260         return "";
 261 }
 262 #endif
 263
 264
 265 /**
 266  * iwl3945_tx_queue_reclaim - Reclaim Tx queue entries already Tx'd
 267  *
 268  * When FW advances 'R' index, all entries between old and new 'R' index
 269  * need to be reclaimed. As result, some free space forms. If there is
 270  * enough free space (> low mark), wake the stack that feeds us.
 271  */
 272 static void iwl3945_tx_queue_reclaim(struct iwl3945_priv *priv,
 273                                      int txq_id, int index)
 274 {
 275         struct iwl3945_tx_queue *txq = &priv->txq[txq_id];
 276         struct iwl3945_queue *q = &txq->q;
 277         struct iwl3945_tx_info *tx_info;
 278
 279         BUG_ON(txq_id == IWL_CMD_QUEUE_NUM);
 280
 281         for (index = iwl_queue_inc_wrap(index, q->n_bd); q->read_ptr != index;
 282                 q->read_ptr = iwl_queue_inc_wrap(q->read_ptr, q->n_bd)) {
 283
 284                 tx_info = &txq->txb[txq->q.read_ptr];
 285                 ieee80211_tx_status_irqsafe(priv->hw, tx_info->skb[0]);
 286                 tx_info->skb[0] = NULL;
 287                 iwl3945_hw_txq_free_tfd(priv, txq);
 288         }
 289
 290         if (iwl3945_queue_space(q) > q->low_mark && (txq_id >= 0) &&
 291                         (txq_id != IWL_CMD_QUEUE_NUM) &&
 292                         priv->mac80211_registered)
 293                 ieee80211_wake_queue(priv->hw, txq_id);
 294 }
 295
 296 /**
 297  * iwl3945_rx_reply_tx - Handle Tx response
 298  */
 299 static void iwl3945_rx_reply_tx(struct iwl3945_priv *priv,
 300                             struct iwl3945_rx_mem_buffer *rxb)
 301 {
 302         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
 303         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
 304         int txq_id = SEQ_TO_QUEUE(sequence);
 305         int index = SEQ_TO_INDEX(sequence);
 306         struct iwl3945_tx_queue *txq = &priv->txq[txq_id];
 307         struct ieee80211_tx_info *info;
 308         struct iwl3945_tx_resp *tx_resp = (void *)&pkt->u.raw[0];
 309         u32  status = le32_to_cpu(tx_resp->status);
 310         int rate_idx;
 311
 312         if ((index >= txq->q.n_bd) || (iwl3945_x2_queue_used(&txq->q, index) == 0)) {
 313                 IWL_ERROR("Read index for DMA queue txq_id (%d) index %d "
 314                           "is out of range [0-%d] %d %d\n", txq_id,
 315                           index, txq->q.n_bd, txq->q.write_ptr,
 316                           txq->q.read_ptr);
 317                 return;
 318         }
 319
 320         info = IEEE80211_SKB_CB(txq->txb[txq->q.read_ptr].skb[0]);
 321         memset(&info->status, 0, sizeof(info->status));
 322
 323         info->status.retry_count = tx_resp->failure_frame;
 324         /* tx_status->rts_retry_count = tx_resp->failure_rts; */
 325         info->flags |= ((status & TX_STATUS_MSK) == TX_STATUS_SUCCESS) ?
 326                                 IEEE80211_TX_STAT_ACK : 0;
 327
 328         IWL_DEBUG_TX("Tx queue %d Status %s (0x%08x) plcp rate %d retries %d\n",
 329                         txq_id, iwl3945_get_tx_fail_reason(status), status,
 330                         tx_resp->rate, tx_resp->failure_frame);
 331
 332         rate_idx = iwl3945_hwrate_to_plcp_idx(tx_resp->rate);
 333         if (info->band == IEEE80211_BAND_5GHZ)
 334                 rate_idx -= IWL_FIRST_OFDM_RATE;
 335         info->tx_rate_idx = rate_idx;
 336         IWL_DEBUG_TX_REPLY("Tx queue reclaim %d\n", index);
 337         iwl3945_tx_queue_reclaim(priv, txq_id, index);
 338
 339         if (iwl_check_bits(status, TX_ABORT_REQUIRED_MSK))
 340                 IWL_ERROR("TODO:  Implement Tx ABORT REQUIRED!!!\n");
 341 }
 342
 343
 344
 345 /*****************************************************************************
 346  *
 347  * Intel PRO/Wireless 3945ABG/BG Network Connection
 348  *
 349  *  RX handler implementations
 350  *
 351  *****************************************************************************/
 352
 353 void iwl3945_hw_rx_statistics(struct iwl3945_priv *priv, struct iwl3945_rx_mem_buffer *rxb)
 354 {
 355         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
 356         IWL_DEBUG_RX("Statistics notification received (%d vs %d).\n",
 357                      (int)sizeof(struct iwl3945_notif_statistics),
 358                      le32_to_cpu(pkt->len));
 359
 360         memcpy(&priv->statistics, pkt->u.raw, sizeof(priv->statistics));
 361
 362         iwl3945_led_background(priv);
 363
 364         priv->last_statistics_time = jiffies;
 365 }
 366
 367 /******************************************************************************
 368  *
 369  * Misc. internal state and helper functions
 370  *
 371  ******************************************************************************/
 372 #ifdef CONFIG_IWL3945_DEBUG
 373
 374 /**
 375  * iwl3945_report_frame - dump frame to syslog during debug sessions
 376  *
 377  * You may hack this function to show different aspects of received frames,
 378  * including selective frame dumps.
 379  * group100 parameter selects whether to show 1 out of 100 good frames.
 380  */
 381 static void iwl3945_dbg_report_frame(struct iwl3945_priv *priv,
 382                       struct iwl3945_rx_packet *pkt,
 383                       struct ieee80211_hdr *header, int group100)
 384 {
 385         u32 to_us;
 386         u32 print_summary = 0;
 387         u32 print_dump = 0;     /* set to 1 to dump all frames' contents */
 388         u32 hundred = 0;
 389         u32 dataframe = 0;
 390         __le16 fc;
 391         u16 seq_ctl;
 392         u16 channel;
 393         u16 phy_flags;
 394         u16 length;
 395         u16 status;
 396         u16 bcn_tmr;
 397         u32 tsf_low;
 398         u64 tsf;
 399         u8 rssi;
 400         u8 agc;
 401         u16 sig_avg;
 402         u16 noise_diff;
 403         struct iwl3945_rx_frame_stats *rx_stats = IWL_RX_STATS(pkt);
 404         struct iwl3945_rx_frame_hdr *rx_hdr = IWL_RX_HDR(pkt);
 405         struct iwl3945_rx_frame_end *rx_end = IWL_RX_END(pkt);
 406         u8 *data = IWL_RX_DATA(pkt);
 407
 408         /* MAC header */
 409         fc = header->frame_control;
 410         seq_ctl = le16_to_cpu(header->seq_ctrl);
 411
 412         /* metadata */
 413         channel = le16_to_cpu(rx_hdr->channel);
 414         phy_flags = le16_to_cpu(rx_hdr->phy_flags);
 415         length = le16_to_cpu(rx_hdr->len);
 416
 417         /* end-of-frame status and timestamp */
 418         status = le32_to_cpu(rx_end->status);
 419         bcn_tmr = le32_to_cpu(rx_end->beacon_timestamp);
 420         tsf_low = le64_to_cpu(rx_end->timestamp) & 0x0ffffffff;
 421         tsf = le64_to_cpu(rx_end->timestamp);
 422
 423         /* signal statistics */
 424         rssi = rx_stats->rssi;
 425         agc = rx_stats->agc;
 426         sig_avg = le16_to_cpu(rx_stats->sig_avg);
 427         noise_diff = le16_to_cpu(rx_stats->noise_diff);
 428
 429         to_us = !compare_ether_addr(header->addr1, priv->mac_addr);
 430
 431         /* if data frame is to us and all is good,
 432          *   (optionally) print summary for only 1 out of every 100 */
 433         if (to_us && (fc & ~cpu_to_le16(IEEE80211_FCTL_PROTECTED)) ==
 434             cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FTYPE_DATA)) {
 435                 dataframe = 1;
 436                 if (!group100)
 437                         print_summary = 1;      /* print each frame */
 438                 else if (priv->framecnt_to_us < 100) {
 439                         priv->framecnt_to_us++;
 440                         print_summary = 0;
 441                 } else {
 442                         priv->framecnt_to_us = 0;
 443                         print_summary = 1;
 444                         hundred = 1;
 445                 }
 446         } else {
 447                 /* print summary for all other frames */
 448                 print_summary = 1;
 449         }
 450
 451         if (print_summary) {
 452                 char *title;
 453                 int rate;
 454
 455                 if (hundred)
 456                         title = "100Frames";
 457                 else if (ieee80211_has_retry(fc))
 458                         title = "Retry";
 459                 else if (ieee80211_is_assoc_resp(fc))
 460                         title = "AscRsp";
 461                 else if (ieee80211_is_reassoc_resp(fc))
 462                         title = "RasRsp";
 463                 else if (ieee80211_is_probe_resp(fc)) {
 464                         title = "PrbRsp";
 465                         print_dump = 1; /* dump frame contents */
 466                 } else if (ieee80211_is_beacon(fc)) {
 467                         title = "Beacon";
 468                         print_dump = 1; /* dump frame contents */
 469                 } else if (ieee80211_is_atim(fc))
 470                         title = "ATIM";
 471                 else if (ieee80211_is_auth(fc))
 472                         title = "Auth";
 473                 else if (ieee80211_is_deauth(fc))
 474                         title = "DeAuth";
 475                 else if (ieee80211_is_disassoc(fc))
 476                         title = "DisAssoc";
 477                 else
 478                         title = "Frame";
 479
 480                 rate = iwl3945_hwrate_to_plcp_idx(rx_hdr->rate);
 481                 if (rate == -1)
 482                         rate = 0;
 483                 else
 484                         rate = iwl3945_rates[rate].ieee / 2;
 485
 486                 /* print frame summary.
 487                  * MAC addresses show just the last byte (for brevity),
 488                  *    but you can hack it to show more, if you'd like to. */
 489                 if (dataframe)
 490                         IWL_DEBUG_RX("%s: mhd=0x%04x, dst=0x%02x, "
 491                                      "len=%u, rssi=%d, chnl=%d, rate=%d, \n",
 492                                      title, le16_to_cpu(fc), header->addr1[5],
 493                                      length, rssi, channel, rate);
 494                 else {
 495                         /* src/dst addresses assume managed mode */
 496                         IWL_DEBUG_RX("%s: 0x%04x, dst=0x%02x, "
 497                                      "src=0x%02x, rssi=%u, tim=%lu usec, "
 498                                      "phy=0x%02x, chnl=%d\n",
 499                                      title, le16_to_cpu(fc), header->addr1[5],
 500                                      header->addr3[5], rssi,
 501                                      tsf_low - priv->scan_start_tsf,
 502                                      phy_flags, channel);
 503                 }
 504         }
 505         if (print_dump)
 506                 iwl3945_print_hex_dump(IWL_DL_RX, data, length);
 507 }
 508 #else
 509 static inline void iwl3945_dbg_report_frame(struct iwl3945_priv *priv,
 510                       struct iwl3945_rx_packet *pkt,
 511                       struct ieee80211_hdr *header, int group100)
 512 {
 513 }
 514 #endif
 515
 516 /* This is necessary only for a number of statistics, see the caller. */
 517 static int iwl3945_is_network_packet(struct iwl3945_priv *priv,
 518                 struct ieee80211_hdr *header)
 519 {
 520         /* Filter incoming packets to determine if they are targeted toward
 521          * this network, discarding packets coming from ourselves */
 522         switch (priv->iw_mode) {
 523         case IEEE80211_IF_TYPE_IBSS: /* Header: Dest. | Source    | BSSID */
 524                 /* packets to our IBSS update information */
 525                 return !compare_ether_addr(header->addr3, priv->bssid);
 526         case IEEE80211_IF_TYPE_STA: /* Header: Dest. | AP{BSSID} | Source */
 527                 /* packets to our IBSS update information */
 528                 return !compare_ether_addr(header->addr2, priv->bssid);
 529         default:
 530                 return 1;
 531         }
 532 }
 533
 534 static void iwl3945_add_radiotap(struct iwl3945_priv *priv,
 535                                  struct sk_buff *skb,
 536                                  struct iwl3945_rx_frame_hdr *rx_hdr,
 537                                  struct ieee80211_rx_status *stats)
 538 {
 539         /* First cache any information we need before we overwrite
 540          * the information provided in the skb from the hardware */
 541         s8 signal = stats->signal;
 542         s8 noise = 0;
 543         int rate = stats->rate_idx;
 544         u64 tsf = stats->mactime;
 545         __le16 phy_flags_hw = rx_hdr->phy_flags, antenna;
 546
 547         struct iwl3945_rt_rx_hdr {
 548                 struct ieee80211_radiotap_header rt_hdr;
 549                 __le64 rt_tsf;          /* TSF */
 550                 u8 rt_flags;            /* radiotap packet flags */
 551                 u8 rt_rate;             /* rate in 500kb/s */
 552                 __le16 rt_channelMHz;   /* channel in MHz */
 553                 __le16 rt_chbitmask;    /* channel bitfield */
 554                 s8 rt_dbmsignal;        /* signal in dBm, kluged to signed */
 555                 s8 rt_dbmnoise;
 556                 u8 rt_antenna;          /* antenna number */
 557         } __attribute__ ((packed)) *iwl3945_rt;
 558
 559         if (skb_headroom(skb) < sizeof(*iwl3945_rt)) {
 560                 if (net_ratelimit())
 561                         printk(KERN_ERR "not enough headroom [%d] for "
 562                                "radiotap head [%zd]\n",
 563                                skb_headroom(skb), sizeof(*iwl3945_rt));
 564                 return;
 565         }
 566
 567         /* put radiotap header in front of 802.11 header and data */
 568         iwl3945_rt = (void *)skb_push(skb, sizeof(*iwl3945_rt));
 569
 570         /* initialise radiotap header */
 571         iwl3945_rt->rt_hdr.it_version = PKTHDR_RADIOTAP_VERSION;
 572         iwl3945_rt->rt_hdr.it_pad = 0;
 573
 574         /* total header + data */
 575         put_unaligned_le16(sizeof(*iwl3945_rt), &iwl3945_rt->rt_hdr.it_len);
 576
 577         /* Indicate all the fields we add to the radiotap header */
 578         put_unaligned_le32((1 << IEEE80211_RADIOTAP_TSFT) |
 579                            (1 << IEEE80211_RADIOTAP_FLAGS) |
 580                            (1 << IEEE80211_RADIOTAP_RATE) |
 581                            (1 << IEEE80211_RADIOTAP_CHANNEL) |
 582                            (1 << IEEE80211_RADIOTAP_DBM_ANTSIGNAL) |
 583                            (1 << IEEE80211_RADIOTAP_DBM_ANTNOISE) |
 584                            (1 << IEEE80211_RADIOTAP_ANTENNA),
 585                         &iwl3945_rt->rt_hdr.it_present);
 586
 587         /* Zero the flags, we'll add to them as we go */
 588         iwl3945_rt->rt_flags = 0;
 589
 590         put_unaligned_le64(tsf, &iwl3945_rt->rt_tsf);
 591
 592         iwl3945_rt->rt_dbmsignal = signal;
 593         iwl3945_rt->rt_dbmnoise = noise;
 594
 595         /* Convert the channel frequency and set the flags */
 596         put_unaligned_le16(stats->freq, &iwl3945_rt->rt_channelMHz);
 597         if (!(phy_flags_hw & RX_RES_PHY_FLAGS_BAND_24_MSK))
 598                 put_unaligned_le16(IEEE80211_CHAN_OFDM | IEEE80211_CHAN_5GHZ,
 599                               &iwl3945_rt->rt_chbitmask);
 600         else if (phy_flags_hw & RX_RES_PHY_FLAGS_MOD_CCK_MSK)
 601                 put_unaligned_le16(IEEE80211_CHAN_CCK | IEEE80211_CHAN_2GHZ,
 602                               &iwl3945_rt->rt_chbitmask);
 603         else    /* 802.11g */
 604                 put_unaligned_le16(IEEE80211_CHAN_OFDM | IEEE80211_CHAN_2GHZ,
 605                               &iwl3945_rt->rt_chbitmask);
 606
 607         if (rate == -1)
 608                 iwl3945_rt->rt_rate = 0;
 609         else {
 610                 if (stats->band == IEEE80211_BAND_5GHZ)
 611                         rate += IWL_FIRST_OFDM_RATE;
 612
 613                 iwl3945_rt->rt_rate = iwl3945_rates[rate].ieee;
 614         }
 615
 616         /* antenna number */
 617         antenna = phy_flags_hw & RX_RES_PHY_FLAGS_ANTENNA_MSK;
 618         iwl3945_rt->rt_antenna = le16_to_cpu(antenna) >> 4;
 619
 620         /* set the preamble flag if we have it */
 621         if (phy_flags_hw & RX_RES_PHY_FLAGS_SHORT_PREAMBLE_MSK)
 622                 iwl3945_rt->rt_flags |= IEEE80211_RADIOTAP_F_SHORTPRE;
 623
 624         stats->flag |= RX_FLAG_RADIOTAP;
 625 }
 626
 627 static void iwl3945_pass_packet_to_mac80211(struct iwl3945_priv *priv,
 628                                    struct iwl3945_rx_mem_buffer *rxb,
 629                                    struct ieee80211_rx_status *stats)
 630 {
 631         struct iwl3945_rx_packet *pkt = (struct iwl3945_rx_packet *)rxb->skb->data;
 632 #ifdef CONFIG_IWL3945_LEDS
 633         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)IWL_RX_DATA(pkt);
 634 #endif
 635         struct iwl3945_rx_frame_hdr *rx_hdr = IWL_RX_HDR(pkt);
 636         struct iwl3945_rx_frame_end *rx_end = IWL_RX_END(pkt);
 637         short len = le16_to_cpu(rx_hdr->len);
 638
 639         /* We received data from the HW, so stop the watchdog */
 640         if (unlikely((len + IWL_RX_FRAME_SIZE) > skb_tailroom(rxb->skb))) {
 641                 IWL_DEBUG_DROP("Corruption detected!\n");
 642                 return;
 643         }
 644
 645         /* We only process data packets if the interface is open */
 646         if (unlikely(!priv->is_open)) {
 647                 IWL_DEBUG_DROP_LIMIT
 648                     ("Dropping packet while interface is not open.\n");
 649                 return;
 650         }
 651
 652         skb_reserve(rxb->skb, (void *)rx_hdr->payload - (void *)pkt);
 653         /* Set the size of the skb to the size of the frame */
 654         skb_put(rxb->skb, le16_to_cpu(rx_hdr->len));
 655
 656         if (iwl3945_param_hwcrypto)
 657                 iwl3945_set_decrypted_flag(priv, rxb->skb,
 658                                        le32_to_cpu(rx_end->status), stats);
 659
 660         if (priv->add_radiotap)
 661                 iwl3945_add_radiotap(priv, rxb->skb, rx_hdr, stats);
 662
 663 #ifdef CONFIG_IWL3945_LEDS
 664         if (ieee80211_is_data(hdr->frame_control))
 665                 priv->rxtxpackets += len;
 666 #endif
 667         ieee80211_rx_irqsafe(priv->hw, rxb->skb, stats);
 668         rxb->skb = NULL;
 669 }
 670
 671 #define IWL_DELAY_NEXT_SCAN_AFTER_ASSOC (HZ*6)
 672
 673 static void iwl3945_rx_reply_rx(struct iwl3945_priv *priv,
 674                                 struct iwl3945_rx_mem_buffer *rxb)
 675 {
 676         struct ieee80211_hdr *header;
 677         struct ieee80211_rx_status rx_status;
 678         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
 679         struct iwl3945_rx_frame_stats *rx_stats = IWL_RX_STATS(pkt);
 680         struct iwl3945_rx_frame_hdr *rx_hdr = IWL_RX_HDR(pkt);
 681         struct iwl3945_rx_frame_end *rx_end = IWL_RX_END(pkt);
 682         int snr;
 683         u16 rx_stats_sig_avg = le16_to_cpu(rx_stats->sig_avg);
 684         u16 rx_stats_noise_diff = le16_to_cpu(rx_stats->noise_diff);
 685         u8 network_packet;
 686
 687         rx_status.antenna = 0;
 688         rx_status.flag = 0;
 689         rx_status.mactime = le64_to_cpu(rx_end->timestamp);
 690         rx_status.freq =
 691                 ieee80211_channel_to_frequency(le16_to_cpu(rx_hdr->channel));
 692         rx_status.band = (rx_hdr->phy_flags & RX_RES_PHY_FLAGS_BAND_24_MSK) ?
 693                                 IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ;
 694
 695         rx_status.rate_idx = iwl3945_hwrate_to_plcp_idx(rx_hdr->rate);
 696         if (rx_status.band == IEEE80211_BAND_5GHZ)
 697                 rx_status.rate_idx -= IWL_FIRST_OFDM_RATE;
 698
 699         if ((unlikely(rx_stats->phy_count > 20))) {
 700                 IWL_DEBUG_DROP
 701                     ("dsp size out of range [0,20]: "
 702                      "%d/n", rx_stats->phy_count);
 703                 return;
 704         }
 705
 706         if (!(rx_end->status & RX_RES_STATUS_NO_CRC32_ERROR)
 707             || !(rx_end->status & RX_RES_STATUS_NO_RXE_OVERFLOW)) {
 708                 IWL_DEBUG_RX("Bad CRC or FIFO: 0x%08X.\n", rx_end->status);
 709                 return;
 710         }
 711
 712
 713
 714         /* Convert 3945's rssi indicator to dBm */
 715         rx_status.signal = rx_stats->rssi - IWL_RSSI_OFFSET;
 716
 717         /* Set default noise value to -127 */
 718         if (priv->last_rx_noise == 0)
 719                 priv->last_rx_noise = IWL_NOISE_MEAS_NOT_AVAILABLE;
 720
 721         /* 3945 provides noise info for OFDM frames only.
 722          * sig_avg and noise_diff are measured by the 3945's digital signal
 723          *   processor (DSP), and indicate linear levels of signal level and
 724          *   distortion/noise within the packet preamble after
 725          *   automatic gain control (AGC).  sig_avg should stay fairly
 726          *   constant if the radio's AGC is working well.
 727          * Since these values are linear (not dB or dBm), linear
 728          *   signal-to-noise ratio (SNR) is (sig_avg / noise_diff).
 729          * Convert linear SNR to dB SNR, then subtract that from rssi dBm
 730          *   to obtain noise level in dBm.
 731          * Calculate rx_status.signal (quality indicator in %) based on SNR. */
 732         if (rx_stats_noise_diff) {
 733                 snr = rx_stats_sig_avg / rx_stats_noise_diff;
 734                 rx_status.noise = rx_status.signal -
 735                                         iwl3945_calc_db_from_ratio(snr);
 736                 rx_status.qual = iwl3945_calc_sig_qual(rx_status.signal,
 737                                                          rx_status.noise);
 738
 739         /* If noise info not available, calculate signal quality indicator (%)
 740          *   using just the dBm signal level. */
 741         } else {
 742                 rx_status.noise = priv->last_rx_noise;
 743                 rx_status.qual = iwl3945_calc_sig_qual(rx_status.signal, 0);
 744         }
 745
 746
 747         IWL_DEBUG_STATS("Rssi %d noise %d qual %d sig_avg %d noise_diff %d\n",
 748                         rx_status.signal, rx_status.noise, rx_status.qual,
 749                         rx_stats_sig_avg, rx_stats_noise_diff);
 750
 751         header = (struct ieee80211_hdr *)IWL_RX_DATA(pkt);
 752
 753         network_packet = iwl3945_is_network_packet(priv, header);
 754
 755         IWL_DEBUG_STATS_LIMIT("[%c] %d RSSI:%d Signal:%u, Noise:%u, Rate:%u\n",
 756                               network_packet ? '*' : ' ',
 757                               le16_to_cpu(rx_hdr->channel),
 758                               rx_status.signal, rx_status.signal,
 759                               rx_status.noise, rx_status.rate_idx);
 760
 761 #ifdef CONFIG_IWL3945_DEBUG
 762         if (iwl3945_debug_level & (IWL_DL_RX))
 763                 /* Set "1" to report good data frames in groups of 100 */
 764                 iwl3945_dbg_report_frame(priv, pkt, header, 1);
 765 #endif
 766
 767         if (network_packet) {
 768                 priv->last_beacon_time = le32_to_cpu(rx_end->beacon_timestamp);
 769                 priv->last_tsf = le64_to_cpu(rx_end->timestamp);
 770                 priv->last_rx_rssi = rx_status.signal;
 771                 priv->last_rx_noise = rx_status.noise;
 772         }
 773
 774         if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR) {
 775                 iwl3945_pass_packet_to_mac80211(priv, rxb, &rx_status);
 776                 return;
 777         }
 778
 779         switch (le16_to_cpu(header->frame_control) & IEEE80211_FCTL_FTYPE) {
 780         case IEEE80211_FTYPE_MGMT:
 781                 switch (le16_to_cpu(header->frame_control) &
 782                         IEEE80211_FCTL_STYPE) {
 783                 case IEEE80211_STYPE_PROBE_RESP:
 784                 case IEEE80211_STYPE_BEACON:{
 785                                 /* If this is a beacon or probe response for
 786                                  * our network then cache the beacon
 787                                  * timestamp */
 788                                 if ((((priv->iw_mode == IEEE80211_IF_TYPE_STA)
 789                                       && !compare_ether_addr(header->addr2,
 790                                                              priv->bssid)) ||
 791                                      ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
 792                                       && !compare_ether_addr(header->addr3,
 793                                                              priv->bssid)))) {
 794                                         struct ieee80211_mgmt *mgmt =
 795                                             (struct ieee80211_mgmt *)header;
 796                                         __le32 *pos;
 797                                         pos = (__le32 *)&mgmt->u.beacon.
 798                                             timestamp;
 799                                         priv->timestamp0 = le32_to_cpu(pos[0]);
 800                                         priv->timestamp1 = le32_to_cpu(pos[1]);
 801                                         priv->beacon_int = le16_to_cpu(
 802                                             mgmt->u.beacon.beacon_int);
 803                                         if (priv->call_post_assoc_from_beacon &&
 804                                             (priv->iw_mode ==
 805                                                 IEEE80211_IF_TYPE_STA))
 806                                                 queue_work(priv->workqueue,
 807                                                     &priv->post_associate.work);
 808
 809                                         priv->call_post_assoc_from_beacon = 0;
 810                                 }
 811
 812                                 break;
 813                         }
 814
 815                 case IEEE80211_STYPE_ACTION:
 816                         /* TODO: Parse 802.11h frames for CSA... */
 817                         break;
 818
 819                         /*
 820                          * TODO: Use the new callback function from
 821                          * mac80211 instead of sniffing these packets.
 822                          */
 823                 case IEEE80211_STYPE_ASSOC_RESP:
 824                 case IEEE80211_STYPE_REASSOC_RESP:{
 825                                 struct ieee80211_mgmt *mgnt =
 826                                     (struct ieee80211_mgmt *)header;
 827
 828                                 /* We have just associated, give some
 829                                  * time for the 4-way handshake if
 830                                  * any. Don't start scan too early. */
 831                                 priv->next_scan_jiffies = jiffies +
 832                                         IWL_DELAY_NEXT_SCAN_AFTER_ASSOC;
 833
 834                                 priv->assoc_id = (~((1 << 15) | (1 << 14)) &
 835                                                   le16_to_cpu(mgnt->u.
 836                                                               assoc_resp.aid));
 837                                 priv->assoc_capability =
 838                                     le16_to_cpu(mgnt->u.assoc_resp.capab_info);
 839                                 if (priv->beacon_int)
 840                                         queue_work(priv->workqueue,
 841                                             &priv->post_associate.work);
 842                                 else
 843                                         priv->call_post_assoc_from_beacon = 1;
 844                                 break;
 845                         }
 846
 847                 case IEEE80211_STYPE_PROBE_REQ:{
 848                                 DECLARE_MAC_BUF(mac1);
 849                                 DECLARE_MAC_BUF(mac2);
 850                                 DECLARE_MAC_BUF(mac3);
 851                                 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
 852                                         IWL_DEBUG_DROP
 853                                             ("Dropping (non network): %s"
 854                                              ", %s, %s\n",
 855                                              print_mac(mac1, header->addr1),
 856                                              print_mac(mac2, header->addr2),
 857                                              print_mac(mac3, header->addr3));
 858                                 return;
 859                         }
 860                 }
 861
 862         case IEEE80211_FTYPE_DATA:
 863                 /* fall through */
 864         default:
 865                 iwl3945_pass_packet_to_mac80211(priv, rxb, &rx_status);
 866                 break;
 867         }
 868 }
 869
 870 int iwl3945_hw_txq_attach_buf_to_tfd(struct iwl3945_priv *priv, void *ptr,
 871                                  dma_addr_t addr, u16 len)
 872 {
 873         int count;
 874         u32 pad;
 875         struct iwl3945_tfd_frame *tfd = (struct iwl3945_tfd_frame *)ptr;
 876
 877         count = TFD_CTL_COUNT_GET(le32_to_cpu(tfd->control_flags));
 878         pad = TFD_CTL_PAD_GET(le32_to_cpu(tfd->control_flags));
 879
 880         if ((count >= NUM_TFD_CHUNKS) || (count < 0)) {
 881                 IWL_ERROR("Error can not send more than %d chunks\n",
 882                           NUM_TFD_CHUNKS);
 883                 return -EINVAL;
 884         }
 885
 886         tfd->pa[count].addr = cpu_to_le32(addr);
 887         tfd->pa[count].len = cpu_to_le32(len);
 888
 889         count++;
 890
 891         tfd->control_flags = cpu_to_le32(TFD_CTL_COUNT_SET(count) |
 892                                          TFD_CTL_PAD_SET(pad));
 893
 894         return 0;
 895 }
 896
 897 /**
 898  * iwl3945_hw_txq_free_tfd - Free one TFD, those at index [txq->q.read_ptr]
 899  *
 900  * Does NOT advance any indexes
 901  */
 902 int iwl3945_hw_txq_free_tfd(struct iwl3945_priv *priv, struct iwl3945_tx_queue *txq)
 903 {
 904         struct iwl3945_tfd_frame *bd_tmp = (struct iwl3945_tfd_frame *)&txq->bd[0];
 905         struct iwl3945_tfd_frame *bd = &bd_tmp[txq->q.read_ptr];
 906         struct pci_dev *dev = priv->pci_dev;
 907         int i;
 908         int counter;
 909
 910         /* classify bd */
 911         if (txq->q.id == IWL_CMD_QUEUE_NUM)
 912                 /* nothing to cleanup after for host commands */
 913                 return 0;
 914
 915         /* sanity check */
 916         counter = TFD_CTL_COUNT_GET(le32_to_cpu(bd->control_flags));
 917         if (counter > NUM_TFD_CHUNKS) {
 918                 IWL_ERROR("Too many chunks: %i\n", counter);
 919                 /* @todo issue fatal error, it is quite serious situation */
 920                 return 0;
 921         }
 922
 923         /* unmap chunks if any */
 924
 925         for (i = 1; i < counter; i++) {
 926                 pci_unmap_single(dev, le32_to_cpu(bd->pa[i].addr),
 927                                  le32_to_cpu(bd->pa[i].len), PCI_DMA_TODEVICE);
 928                 if (txq->txb[txq->q.read_ptr].skb[0]) {
 929                         struct sk_buff *skb = txq->txb[txq->q.read_ptr].skb[0];
 930                         if (txq->txb[txq->q.read_ptr].skb[0]) {
 931                                 /* Can be called from interrupt context */
 932                                 dev_kfree_skb_any(skb);
 933                                 txq->txb[txq->q.read_ptr].skb[0] = NULL;
 934                         }
 935                 }
 936         }
 937         return 0;
 938 }
 939
 940 u8 iwl3945_hw_find_station(struct iwl3945_priv *priv, const u8 *addr)
 941 {
 942         int i;
 943         int ret = IWL_INVALID_STATION;
 944         unsigned long flags;
 945         DECLARE_MAC_BUF(mac);
 946
 947         spin_lock_irqsave(&priv->sta_lock, flags);
 948         for (i = IWL_STA_ID; i < priv->hw_setting.max_stations; i++)
 949                 if ((priv->stations[i].used) &&
 950                     (!compare_ether_addr
 951                      (priv->stations[i].sta.sta.addr, addr))) {
 952                         ret = i;
 953                         goto out;
 954                 }
 955
 956         IWL_DEBUG_INFO("can not find STA %s (total %d)\n",
 957                        print_mac(mac, addr), priv->num_stations);
 958  out:
 959         spin_unlock_irqrestore(&priv->sta_lock, flags);
 960         return ret;
 961 }
 962
 963 /**
 964  * iwl3945_hw_build_tx_cmd_rate - Add rate portion to TX_CMD:
 965  *
 966 */
 967 void iwl3945_hw_build_tx_cmd_rate(struct iwl3945_priv *priv,
 968                               struct iwl3945_cmd *cmd,
 969                               struct ieee80211_tx_info *info,
 970                               struct ieee80211_hdr *hdr, int sta_id, int tx_id)
 971 {
 972         unsigned long flags;
 973         u16 hw_value = ieee80211_get_tx_rate(priv->hw, info)->hw_value;
 974         u16 rate_index = min(hw_value & 0xffff, IWL_RATE_COUNT - 1);
 975         u16 rate_mask;
 976         int rate;
 977         u8 rts_retry_limit;
 978         u8 data_retry_limit;
 979         __le32 tx_flags;
 980         __le16 fc = hdr->frame_control;
 981
 982         rate = iwl3945_rates[rate_index].plcp;
 983         tx_flags = cmd->cmd.tx.tx_flags;
 984
 985         /* We need to figure out how to get the sta->supp_rates while
 986          * in this running context */
 987         rate_mask = IWL_RATES_MASK;
 988
 989         spin_lock_irqsave(&priv->sta_lock, flags);
 990
 991         priv->stations[sta_id].current_rate.rate_n_flags = rate;
 992
 993         if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) &&
 994             (sta_id != priv->hw_setting.bcast_sta_id) &&
 995                 (sta_id != IWL_MULTICAST_ID))
 996                 priv->stations[IWL_STA_ID].current_rate.rate_n_flags = rate;
 997
 998         spin_unlock_irqrestore(&priv->sta_lock, flags);
 999
1000         if (tx_id >= IWL_CMD_QUEUE_NUM)
1001                 rts_retry_limit = 3;
1002         else
1003                 rts_retry_limit = 7;
1004
1005         if (ieee80211_is_probe_resp(fc)) {
1006                 data_retry_limit = 3;
1007                 if (data_retry_limit < rts_retry_limit)
1008                         rts_retry_limit = data_retry_limit;
1009         } else
1010                 data_retry_limit = IWL_DEFAULT_TX_RETRY;
1011
1012         if (priv->data_retry_limit != -1)
1013                 data_retry_limit = priv->data_retry_limit;
1014
1015         if (ieee80211_is_mgmt(fc)) {
1016                 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
1017                 case cpu_to_le16(IEEE80211_STYPE_AUTH):
1018                 case cpu_to_le16(IEEE80211_STYPE_DEAUTH):
1019                 case cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ):
1020                 case cpu_to_le16(IEEE80211_STYPE_REASSOC_REQ):
1021                         if (tx_flags & TX_CMD_FLG_RTS_MSK) {
1022                                 tx_flags &= ~TX_CMD_FLG_RTS_MSK;
1023                                 tx_flags |= TX_CMD_FLG_CTS_MSK;
1024                         }
1025                         break;
1026                 default:
1027                         break;
1028                 }
1029         }
1030
1031         cmd->cmd.tx.rts_retry_limit = rts_retry_limit;
1032         cmd->cmd.tx.data_retry_limit = data_retry_limit;
1033         cmd->cmd.tx.rate = rate;
1034         cmd->cmd.tx.tx_flags = tx_flags;
1035
1036         /* OFDM */
1037         cmd->cmd.tx.supp_rates[0] =
1038            ((rate_mask & IWL_OFDM_RATES_MASK) >> IWL_FIRST_OFDM_RATE) & 0xFF;
1039
1040         /* CCK */
1041         cmd->cmd.tx.supp_rates[1] = (rate_mask & 0xF);
1042
1043         IWL_DEBUG_RATE("Tx sta id: %d, rate: %d (plcp), flags: 0x%4X "
1044                        "cck/ofdm mask: 0x%x/0x%x\n", sta_id,
1045                        cmd->cmd.tx.rate, le32_to_cpu(cmd->cmd.tx.tx_flags),
1046                        cmd->cmd.tx.supp_rates[1], cmd->cmd.tx.supp_rates[0]);
1047 }
1048
1049 u8 iwl3945_sync_sta(struct iwl3945_priv *priv, int sta_id, u16 tx_rate, u8 flags)
1050 {
1051         unsigned long flags_spin;
1052         struct iwl3945_station_entry *station;
1053
1054         if (sta_id == IWL_INVALID_STATION)
1055                 return IWL_INVALID_STATION;
1056
1057         spin_lock_irqsave(&priv->sta_lock, flags_spin);
1058         station = &priv->stations[sta_id];
1059
1060         station->sta.sta.modify_mask = STA_MODIFY_TX_RATE_MSK;
1061         station->sta.rate_n_flags = cpu_to_le16(tx_rate);
1062         station->current_rate.rate_n_flags = tx_rate;
1063         station->sta.mode = STA_CONTROL_MODIFY_MSK;
1064
1065         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
1066
1067         iwl3945_send_add_station(priv, &station->sta, flags);
1068         IWL_DEBUG_RATE("SCALE sync station %d to rate %d\n",
1069                         sta_id, tx_rate);
1070         return sta_id;
1071 }
1072
1073 static int iwl3945_nic_set_pwr_src(struct iwl3945_priv *priv, int pwr_max)
1074 {
1075         int rc;
1076         unsigned long flags;
1077
1078         spin_lock_irqsave(&priv->lock, flags);
1079         rc = iwl3945_grab_nic_access(priv);
1080         if (rc) {
1081                 spin_unlock_irqrestore(&priv->lock, flags);
1082                 return rc;
1083         }
1084
1085         if (!pwr_max) {
1086                 u32 val;
1087
1088                 rc = pci_read_config_dword(priv->pci_dev,
1089                                 PCI_POWER_SOURCE, &val);
1090                 if (val & PCI_CFG_PMC_PME_FROM_D3COLD_SUPPORT) {
1091                         iwl3945_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
1092                                         APMG_PS_CTRL_VAL_PWR_SRC_VAUX,
1093                                         ~APMG_PS_CTRL_MSK_PWR_SRC);
1094                         iwl3945_release_nic_access(priv);
1095
1096                         iwl3945_poll_bit(priv, CSR_GPIO_IN,
1097                                      CSR_GPIO_IN_VAL_VAUX_PWR_SRC,
1098                                      CSR_GPIO_IN_BIT_AUX_POWER, 5000);
1099                 } else
1100                         iwl3945_release_nic_access(priv);
1101         } else {
1102                 iwl3945_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
1103                                 APMG_PS_CTRL_VAL_PWR_SRC_VMAIN,
1104                                 ~APMG_PS_CTRL_MSK_PWR_SRC);
1105
1106                 iwl3945_release_nic_access(priv);
1107                 iwl3945_poll_bit(priv, CSR_GPIO_IN, CSR_GPIO_IN_VAL_VMAIN_PWR_SRC,
1108                              CSR_GPIO_IN_BIT_AUX_POWER, 5000);  /* uS */
1109         }
1110         spin_unlock_irqrestore(&priv->lock, flags);
1111
1112         return rc;
1113 }
1114
1115 static int iwl3945_rx_init(struct iwl3945_priv *priv, struct iwl3945_rx_queue *rxq)
1116 {
1117         int rc;
1118         unsigned long flags;
1119
1120         spin_lock_irqsave(&priv->lock, flags);
1121         rc = iwl3945_grab_nic_access(priv);
1122         if (rc) {
1123                 spin_unlock_irqrestore(&priv->lock, flags);
1124                 return rc;
1125         }
1126
1127         iwl3945_write_direct32(priv, FH_RCSR_RBD_BASE(0), rxq->dma_addr);
1128         iwl3945_write_direct32(priv, FH_RCSR_RPTR_ADDR(0),
1129                              priv->hw_setting.shared_phys +
1130                              offsetof(struct iwl3945_shared, rx_read_ptr[0]));
1131         iwl3945_write_direct32(priv, FH_RCSR_WPTR(0), 0);
1132         iwl3945_write_direct32(priv, FH_RCSR_CONFIG(0),
1133                 ALM_FH_RCSR_RX_CONFIG_REG_VAL_DMA_CHNL_EN_ENABLE |
1134                 ALM_FH_RCSR_RX_CONFIG_REG_VAL_RDRBD_EN_ENABLE |
1135                 ALM_FH_RCSR_RX_CONFIG_REG_BIT_WR_STTS_EN |
1136                 ALM_FH_RCSR_RX_CONFIG_REG_VAL_MAX_FRAG_SIZE_128 |
1137                 (RX_QUEUE_SIZE_LOG << ALM_FH_RCSR_RX_CONFIG_REG_POS_RBDC_SIZE) |
1138                 ALM_FH_RCSR_RX_CONFIG_REG_VAL_IRQ_DEST_INT_HOST |
1139                 (1 << ALM_FH_RCSR_RX_CONFIG_REG_POS_IRQ_RBTH) |
1140                 ALM_FH_RCSR_RX_CONFIG_REG_VAL_MSG_MODE_FH);
1141
1142         /* fake read to flush all prev I/O */
1143         iwl3945_read_direct32(priv, FH_RSSR_CTRL);
1144
1145         iwl3945_release_nic_access(priv);
1146         spin_unlock_irqrestore(&priv->lock, flags);
1147
1148         return 0;
1149 }
1150
1151 static int iwl3945_tx_reset(struct iwl3945_priv *priv)
1152 {
1153         int rc;
1154         unsigned long flags;
1155
1156         spin_lock_irqsave(&priv->lock, flags);
1157         rc = iwl3945_grab_nic_access(priv);
1158         if (rc) {
1159                 spin_unlock_irqrestore(&priv->lock, flags);
1160                 return rc;
1161         }
1162
1163         /* bypass mode */
1164         iwl3945_write_prph(priv, ALM_SCD_MODE_REG, 0x2);
1165
1166         /* RA 0 is active */
1167         iwl3945_write_prph(priv, ALM_SCD_ARASTAT_REG, 0x01);
1168
1169         /* all 6 fifo are active */
1170         iwl3945_write_prph(priv, ALM_SCD_TXFACT_REG, 0x3f);
1171
1172         iwl3945_write_prph(priv, ALM_SCD_SBYP_MODE_1_REG, 0x010000);
1173         iwl3945_write_prph(priv, ALM_SCD_SBYP_MODE_2_REG, 0x030002);
1174         iwl3945_write_prph(priv, ALM_SCD_TXF4MF_REG, 0x000004);
1175         iwl3945_write_prph(priv, ALM_SCD_TXF5MF_REG, 0x000005);
1176
1177         iwl3945_write_direct32(priv, FH_TSSR_CBB_BASE,
1178                              priv->hw_setting.shared_phys);
1179
1180         iwl3945_write_direct32(priv, FH_TSSR_MSG_CONFIG,
1181                 ALM_FH_TSSR_TX_MSG_CONFIG_REG_VAL_SNOOP_RD_TXPD_ON |
1182                 ALM_FH_TSSR_TX_MSG_CONFIG_REG_VAL_ORDER_RD_TXPD_ON |
1183                 ALM_FH_TSSR_TX_MSG_CONFIG_REG_VAL_MAX_FRAG_SIZE_128B |
1184                 ALM_FH_TSSR_TX_MSG_CONFIG_REG_VAL_SNOOP_RD_TFD_ON |
1185                 ALM_FH_TSSR_TX_MSG_CONFIG_REG_VAL_ORDER_RD_CBB_ON |
1186                 ALM_FH_TSSR_TX_MSG_CONFIG_REG_VAL_ORDER_RSP_WAIT_TH |
1187                 ALM_FH_TSSR_TX_MSG_CONFIG_REG_VAL_RSP_WAIT_TH);
1188
1189         iwl3945_release_nic_access(priv);
1190         spin_unlock_irqrestore(&priv->lock, flags);
1191
1192         return 0;
1193 }
1194
1195 /**
1196  * iwl3945_txq_ctx_reset - Reset TX queue context
1197  *
1198  * Destroys all DMA structures and initialize them again
1199  */
1200 static int iwl3945_txq_ctx_reset(struct iwl3945_priv *priv)
1201 {
1202         int rc;
1203         int txq_id, slots_num;
1204
1205         iwl3945_hw_txq_ctx_free(priv);
1206
1207         /* Tx CMD queue */
1208         rc = iwl3945_tx_reset(priv);
1209         if (rc)
1210                 goto error;
1211
1212         /* Tx queue(s) */
1213         for (txq_id = 0; txq_id < TFD_QUEUE_MAX; txq_id++) {
1214                 slots_num = (txq_id == IWL_CMD_QUEUE_NUM) ?
1215                                 TFD_CMD_SLOTS : TFD_TX_CMD_SLOTS;
1216                 rc = iwl3945_tx_queue_init(priv, &priv->txq[txq_id], slots_num,
1217                                 txq_id);
1218                 if (rc) {
1219                         IWL_ERROR("Tx %d queue init failed\n", txq_id);
1220                         goto error;
1221                 }
1222         }
1223
1224         return rc;
1225
1226  error:
1227         iwl3945_hw_txq_ctx_free(priv);
1228         return rc;
1229 }
1230
1231 int iwl3945_hw_nic_init(struct iwl3945_priv *priv)
1232 {
1233         u8 rev_id;
1234         int rc;
1235         unsigned long flags;
1236         struct iwl3945_rx_queue *rxq = &priv->rxq;
1237
1238         iwl3945_power_init_handle(priv);
1239
1240         spin_lock_irqsave(&priv->lock, flags);
1241         iwl3945_set_bit(priv, CSR_ANA_PLL_CFG, CSR39_ANA_PLL_CFG_VAL);
1242         iwl3945_set_bit(priv, CSR_GIO_CHICKEN_BITS,
1243                     CSR_GIO_CHICKEN_BITS_REG_BIT_L1A_NO_L0S_RX);
1244
1245         iwl3945_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
1246         rc = iwl3945_poll_bit(priv, CSR_GP_CNTRL,
1247                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
1248                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
1249         if (rc < 0) {
1250                 spin_unlock_irqrestore(&priv->lock, flags);
1251                 IWL_DEBUG_INFO("Failed to init the card\n");
1252                 return rc;
1253         }
1254
1255         rc = iwl3945_grab_nic_access(priv);
1256         if (rc) {
1257                 spin_unlock_irqrestore(&priv->lock, flags);
1258                 return rc;
1259         }
1260         iwl3945_write_prph(priv, APMG_CLK_EN_REG,
1261                                  APMG_CLK_VAL_DMA_CLK_RQT |
1262                                  APMG_CLK_VAL_BSM_CLK_RQT);
1263         udelay(20);
1264         iwl3945_set_bits_prph(priv, APMG_PCIDEV_STT_REG,
1265                                     APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
1266         iwl3945_release_nic_access(priv);
1267         spin_unlock_irqrestore(&priv->lock, flags);
1268
1269         /* Determine HW type */
1270         rc = pci_read_config_byte(priv->pci_dev, PCI_REVISION_ID, &rev_id);
1271         if (rc)
1272                 return rc;
1273         IWL_DEBUG_INFO("HW Revision ID = 0x%X\n", rev_id);
1274
1275         iwl3945_nic_set_pwr_src(priv, 1);
1276         spin_lock_irqsave(&priv->lock, flags);
1277
1278         if (rev_id & PCI_CFG_REV_ID_BIT_RTP)
1279                 IWL_DEBUG_INFO("RTP type \n");
1280         else if (rev_id & PCI_CFG_REV_ID_BIT_BASIC_SKU) {
1281                 IWL_DEBUG_INFO("3945 RADIO-MB type\n");
1282                 iwl3945_set_bit(priv, CSR_HW_IF_CONFIG_REG,
1283                             CSR39_HW_IF_CONFIG_REG_BIT_3945_MB);
1284         } else {
1285                 IWL_DEBUG_INFO("3945 RADIO-MM type\n");
1286                 iwl3945_set_bit(priv, CSR_HW_IF_CONFIG_REG,
1287                             CSR39_HW_IF_CONFIG_REG_BIT_3945_MM);
1288         }
1289
1290         if (EEPROM_SKU_CAP_OP_MODE_MRC == priv->eeprom.sku_cap) {
1291                 IWL_DEBUG_INFO("SKU OP mode is mrc\n");
1292                 iwl3945_set_bit(priv, CSR_HW_IF_CONFIG_REG,
1293                             CSR39_HW_IF_CONFIG_REG_BIT_SKU_MRC);
1294         } else
1295                 IWL_DEBUG_INFO("SKU OP mode is basic\n");
1296
1297         if ((priv->eeprom.board_revision & 0xF0) == 0xD0) {
1298                 IWL_DEBUG_INFO("3945ABG revision is 0x%X\n",
1299                                priv->eeprom.board_revision);
1300                 iwl3945_set_bit(priv, CSR_HW_IF_CONFIG_REG,
1301                             CSR39_HW_IF_CONFIG_REG_BIT_BOARD_TYPE);
1302         } else {
1303                 IWL_DEBUG_INFO("3945ABG revision is 0x%X\n",
1304                                priv->eeprom.board_revision);
1305                 iwl3945_clear_bit(priv, CSR_HW_IF_CONFIG_REG,
1306                               CSR39_HW_IF_CONFIG_REG_BIT_BOARD_TYPE);
1307         }
1308
1309         if (priv->eeprom.almgor_m_version <= 1) {
1310                 iwl3945_set_bit(priv, CSR_HW_IF_CONFIG_REG,
1311                             CSR39_HW_IF_CONFIG_REG_BITS_SILICON_TYPE_A);
1312                 IWL_DEBUG_INFO("Card M type A version is 0x%X\n",
1313                                priv->eeprom.almgor_m_version);
1314         } else {
1315                 IWL_DEBUG_INFO("Card M type B version is 0x%X\n",
1316                                priv->eeprom.almgor_m_version);
1317                 iwl3945_set_bit(priv, CSR_HW_IF_CONFIG_REG,
1318                             CSR39_HW_IF_CONFIG_REG_BITS_SILICON_TYPE_B);
1319         }
1320         spin_unlock_irqrestore(&priv->lock, flags);
1321
1322         if (priv->eeprom.sku_cap & EEPROM_SKU_CAP_SW_RF_KILL_ENABLE)
1323                 IWL_DEBUG_RF_KILL("SW RF KILL supported in EEPROM.\n");
1324
1325         if (priv->eeprom.sku_cap & EEPROM_SKU_CAP_HW_RF_KILL_ENABLE)
1326                 IWL_DEBUG_RF_KILL("HW RF KILL supported in EEPROM.\n");
1327
1328         /* Allocate the RX queue, or reset if it is already allocated */
1329         if (!rxq->bd) {
1330                 rc = iwl3945_rx_queue_alloc(priv);
1331                 if (rc) {
1332                         IWL_ERROR("Unable to initialize Rx queue\n");
1333                         return -ENOMEM;
1334                 }
1335         } else
1336                 iwl3945_rx_queue_reset(priv, rxq);
1337
1338         iwl3945_rx_replenish(priv);
1339
1340         iwl3945_rx_init(priv, rxq);
1341
1342         spin_lock_irqsave(&priv->lock, flags);
1343
1344         /* Look at using this instead:
1345         rxq->need_update = 1;
1346         iwl3945_rx_queue_update_write_ptr(priv, rxq);
1347         */
1348
1349         rc = iwl3945_grab_nic_access(priv);
1350         if (rc) {
1351                 spin_unlock_irqrestore(&priv->lock, flags);
1352                 return rc;
1353         }
1354         iwl3945_write_direct32(priv, FH_RCSR_WPTR(0), rxq->write & ~7);
1355         iwl3945_release_nic_access(priv);
1356
1357         spin_unlock_irqrestore(&priv->lock, flags);
1358
1359         rc = iwl3945_txq_ctx_reset(priv);
1360         if (rc)
1361                 return rc;
1362
1363         set_bit(STATUS_INIT, &priv->status);
1364
1365         return 0;
1366 }
1367
1368 /**
1369  * iwl3945_hw_txq_ctx_free - Free TXQ Context
1370  *
1371  * Destroy all TX DMA queues and structures
1372  */
1373 void iwl3945_hw_txq_ctx_free(struct iwl3945_priv *priv)
1374 {
1375         int txq_id;
1376
1377         /* Tx queues */
1378         for (txq_id = 0; txq_id < TFD_QUEUE_MAX; txq_id++)
1379                 iwl3945_tx_queue_free(priv, &priv->txq[txq_id]);
1380 }
1381
1382 void iwl3945_hw_txq_ctx_stop(struct iwl3945_priv *priv)
1383 {
1384         int queue;
1385         unsigned long flags;
1386
1387         spin_lock_irqsave(&priv->lock, flags);
1388         if (iwl3945_grab_nic_access(priv)) {
1389                 spin_unlock_irqrestore(&priv->lock, flags);
1390                 iwl3945_hw_txq_ctx_free(priv);
1391                 return;
1392         }
1393
1394         /* stop SCD */
1395         iwl3945_write_prph(priv, ALM_SCD_MODE_REG, 0);
1396
1397         /* reset TFD queues */
1398         for (queue = TFD_QUEUE_MIN; queue < TFD_QUEUE_MAX; queue++) {
1399                 iwl3945_write_direct32(priv, FH_TCSR_CONFIG(queue), 0x0);
1400                 iwl3945_poll_direct_bit(priv, FH_TSSR_TX_STATUS,
1401                                 ALM_FH_TSSR_TX_STATUS_REG_MSK_CHNL_IDLE(queue),
1402                                 1000);
1403         }
1404
1405         iwl3945_release_nic_access(priv);
1406         spin_unlock_irqrestore(&priv->lock, flags);
1407
1408         iwl3945_hw_txq_ctx_free(priv);
1409 }
1410
1411 int iwl3945_hw_nic_stop_master(struct iwl3945_priv *priv)
1412 {
1413         int rc = 0;
1414         u32 reg_val;
1415         unsigned long flags;
1416
1417         spin_lock_irqsave(&priv->lock, flags);
1418
1419         /* set stop master bit */
1420         iwl3945_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
1421
1422         reg_val = iwl3945_read32(priv, CSR_GP_CNTRL);
1423
1424         if (CSR_GP_CNTRL_REG_FLAG_MAC_POWER_SAVE ==
1425             (reg_val & CSR_GP_CNTRL_REG_MSK_POWER_SAVE_TYPE))
1426                 IWL_DEBUG_INFO("Card in power save, master is already "
1427                                "stopped\n");
1428         else {
1429                 rc = iwl3945_poll_bit(priv, CSR_RESET,
1430                                   CSR_RESET_REG_FLAG_MASTER_DISABLED,
1431                                   CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
1432                 if (rc < 0) {
1433                         spin_unlock_irqrestore(&priv->lock, flags);
1434                         return rc;
1435                 }
1436         }
1437
1438         spin_unlock_irqrestore(&priv->lock, flags);
1439         IWL_DEBUG_INFO("stop master\n");
1440
1441         return rc;
1442 }
1443
1444 int iwl3945_hw_nic_reset(struct iwl3945_priv *priv)
1445 {
1446         int rc;
1447         unsigned long flags;
1448
1449         iwl3945_hw_nic_stop_master(priv);
1450
1451         spin_lock_irqsave(&priv->lock, flags);
1452
1453         iwl3945_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
1454
1455         rc = iwl3945_poll_bit(priv, CSR_GP_CNTRL,
1456                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
1457                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
1458
1459         rc = iwl3945_grab_nic_access(priv);
1460         if (!rc) {
1461                 iwl3945_write_prph(priv, APMG_CLK_CTRL_REG,
1462                                          APMG_CLK_VAL_BSM_CLK_RQT);
1463
1464                 udelay(10);
1465
1466                 iwl3945_set_bit(priv, CSR_GP_CNTRL,
1467                             CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
1468
1469                 iwl3945_write_prph(priv, APMG_RTC_INT_MSK_REG, 0x0);
1470                 iwl3945_write_prph(priv, APMG_RTC_INT_STT_REG,
1471                                         0xFFFFFFFF);
1472
1473                 /* enable DMA */
1474                 iwl3945_write_prph(priv, APMG_CLK_EN_REG,
1475                                          APMG_CLK_VAL_DMA_CLK_RQT |
1476                                          APMG_CLK_VAL_BSM_CLK_RQT);
1477                 udelay(10);
1478
1479                 iwl3945_set_bits_prph(priv, APMG_PS_CTRL_REG,
1480                                 APMG_PS_CTRL_VAL_RESET_REQ);
1481                 udelay(5);
1482                 iwl3945_clear_bits_prph(priv, APMG_PS_CTRL_REG,
1483                                 APMG_PS_CTRL_VAL_RESET_REQ);
1484                 iwl3945_release_nic_access(priv);
1485         }
1486
1487         /* Clear the 'host command active' bit... */
1488         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
1489
1490         wake_up_interruptible(&priv->wait_command_queue);
1491         spin_unlock_irqrestore(&priv->lock, flags);
1492
1493         return rc;
1494 }
1495
1496 /**
1497  * iwl3945_hw_reg_adjust_power_by_temp
1498  * return index delta into power gain settings table
1499 */
1500 static int iwl3945_hw_reg_adjust_power_by_temp(int new_reading, int old_reading)
1501 {
1502         return (new_reading - old_reading) * (-11) / 100;
1503 }
1504
1505 /**
1506  * iwl3945_hw_reg_temp_out_of_range - Keep temperature in sane range
1507  */
1508 static inline int iwl3945_hw_reg_temp_out_of_range(int temperature)
1509 {
1510         return ((temperature < -260) || (temperature > 25)) ? 1 : 0;
1511 }
1512
1513 int iwl3945_hw_get_temperature(struct iwl3945_priv *priv)
1514 {
1515         return iwl3945_read32(priv, CSR_UCODE_DRV_GP2);
1516 }
1517
1518 /**
1519  * iwl3945_hw_reg_txpower_get_temperature
1520  * get the current temperature by reading from NIC
1521 */
1522 static int iwl3945_hw_reg_txpower_get_temperature(struct iwl3945_priv *priv)
1523 {
1524         int temperature;
1525
1526         temperature = iwl3945_hw_get_temperature(priv);
1527
1528         /* driver's okay range is -260 to +25.
1529          *   human readable okay range is 0 to +285 */
1530         IWL_DEBUG_INFO("Temperature: %d\n", temperature + IWL_TEMP_CONVERT);
1531
1532         /* handle insane temp reading */
1533         if (iwl3945_hw_reg_temp_out_of_range(temperature)) {
1534                 IWL_ERROR("Error bad temperature value  %d\n", temperature);
1535
1536                 /* if really really hot(?),
1537                  *   substitute the 3rd band/group's temp measured at factory */
1538                 if (priv->last_temperature > 100)
1539                         temperature = priv->eeprom.groups[2].temperature;
1540                 else /* else use most recent "sane" value from driver */
1541                         temperature = priv->last_temperature;
1542         }
1543
1544         return temperature;     /* raw, not "human readable" */
1545 }
1546
1547 /* Adjust Txpower only if temperature variance is greater than threshold.
1548  *
1549  * Both are lower than older versions' 9 degrees */
1550 #define IWL_TEMPERATURE_LIMIT_TIMER   6
1551
1552 /**
1553  * is_temp_calib_needed - determines if new calibration is needed
1554  *
1555  * records new temperature in tx_mgr->temperature.
1556  * replaces tx_mgr->last_temperature *only* if calib needed
1557  *    (assumes caller will actually do the calibration!). */
1558 static int is_temp_calib_needed(struct iwl3945_priv *priv)
1559 {
1560         int temp_diff;
1561
1562         priv->temperature = iwl3945_hw_reg_txpower_get_temperature(priv);
1563         temp_diff = priv->temperature - priv->last_temperature;
1564
1565         /* get absolute value */
1566         if (temp_diff < 0) {
1567                 IWL_DEBUG_POWER("Getting cooler, delta %d,\n", temp_diff);
1568                 temp_diff = -temp_diff;
1569         } else if (temp_diff == 0)
1570                 IWL_DEBUG_POWER("Same temp,\n");
1571         else
1572                 IWL_DEBUG_POWER("Getting warmer, delta %d,\n", temp_diff);
1573
1574         /* if we don't need calibration, *don't* update last_temperature */
1575         if (temp_diff < IWL_TEMPERATURE_LIMIT_TIMER) {
1576                 IWL_DEBUG_POWER("Timed thermal calib not needed\n");
1577                 return 0;
1578         }
1579
1580         IWL_DEBUG_POWER("Timed thermal calib needed\n");
1581
1582         /* assume that caller will actually do calib ...
1583          *   update the "last temperature" value */
1584         priv->last_temperature = priv->temperature;
1585         return 1;
1586 }
1587
1588 #define IWL_MAX_GAIN_ENTRIES 78
1589 #define IWL_CCK_FROM_OFDM_POWER_DIFF  -5
1590 #define IWL_CCK_FROM_OFDM_INDEX_DIFF (10)
1591
1592 /* radio and DSP power table, each step is 1/2 dB.
1593  * 1st number is for RF analog gain, 2nd number is for DSP pre-DAC gain. */
1594 static struct iwl3945_tx_power power_gain_table[2][IWL_MAX_GAIN_ENTRIES] = {
1595         {
1596          {251, 127},            /* 2.4 GHz, highest power */
1597          {251, 127},
1598          {251, 127},
1599          {251, 127},
1600          {251, 125},
1601          {251, 110},
1602          {251, 105},
1603          {251, 98},
1604          {187, 125},
1605          {187, 115},
1606          {187, 108},
1607          {187, 99},
1608          {243, 119},
1609          {243, 111},
1610          {243, 105},
1611          {243, 97},
1612          {243, 92},
1613          {211, 106},
1614          {211, 100},
1615          {179, 120},
1616          {179, 113},
1617          {179, 107},
1618          {147, 125},
1619          {147, 119},
1620          {147, 112},
1621          {147, 106},
1622          {147, 101},
1623          {147, 97},
1624          {147, 91},
1625          {115, 107},
1626          {235, 121},
1627          {235, 115},
1628          {235, 109},
1629          {203, 127},
1630          {203, 121},
1631          {203, 115},
1632          {203, 108},
1633          {203, 102},
1634          {203, 96},
1635          {203, 92},
1636          {171, 110},
1637          {171, 104},
1638          {171, 98},
1639          {139, 116},
1640          {227, 125},
1641          {227, 119},
1642          {227, 113},
1643          {227, 107},
1644          {227, 101},
1645          {227, 96},
1646          {195, 113},
1647          {195, 106},
1648          {195, 102},
1649          {195, 95},
1650          {163, 113},
1651          {163, 106},
1652          {163, 102},
1653          {163, 95},
1654          {131, 113},
1655          {131, 106},
1656          {131, 102},
1657          {131, 95},
1658          {99, 113},
1659          {99, 106},
1660          {99, 102},
1661          {99, 95},
1662          {67, 113},
1663          {67, 106},
1664          {67, 102},
1665          {67, 95},
1666          {35, 113},
1667          {35, 106},
1668          {35, 102},
1669          {35, 95},
1670          {3, 113},
1671          {3, 106},
1672          {3, 102},
1673          {3, 95} },             /* 2.4 GHz, lowest power */
1674         {
1675          {251, 127},            /* 5.x GHz, highest power */
1676          {251, 120},
1677          {251, 114},
1678          {219, 119},
1679          {219, 101},
1680          {187, 113},
1681          {187, 102},
1682          {155, 114},
1683          {155, 103},
1684          {123, 117},
1685          {123, 107},
1686          {123, 99},
1687          {123, 92},
1688          {91, 108},
1689          {59, 125},
1690          {59, 118},
1691          {59, 109},
1692          {59, 102},
1693          {59, 96},
1694          {59, 90},
1695          {27, 104},
1696          {27, 98},
1697          {27, 92},
1698          {115, 118},
1699          {115, 111},
1700          {115, 104},
1701          {83, 126},
1702          {83, 121},
1703          {83, 113},
1704          {83, 105},
1705          {83, 99},
1706          {51, 118},
1707          {51, 111},
1708          {51, 104},
1709          {51, 98},
1710          {19, 116},
1711          {19, 109},
1712          {19, 102},
1713          {19, 98},
1714          {19, 93},
1715          {171, 113},
1716          {171, 107},
1717          {171, 99},
1718          {139, 120},
1719          {139, 113},
1720          {139, 107},
1721          {139, 99},
1722          {107, 120},
1723          {107, 113},
1724          {107, 107},
1725          {107, 99},
1726          {75, 120},
1727          {75, 113},
1728          {75, 107},
1729          {75, 99},
1730          {43, 120},
1731          {43, 113},
1732          {43, 107},
1733          {43, 99},
1734          {11, 120},
1735          {11, 113},
1736          {11, 107},
1737          {11, 99},
1738          {131, 107},
1739          {131, 99},
1740          {99, 120},
1741          {99, 113},
1742          {99, 107},
1743          {99, 99},
1744          {67, 120},
1745          {67, 113},
1746          {67, 107},
1747          {67, 99},
1748          {35, 120},
1749          {35, 113},
1750          {35, 107},
1751          {35, 99},
1752          {3, 120} }             /* 5.x GHz, lowest power */
1753 };
1754
1755 static inline u8 iwl3945_hw_reg_fix_power_index(int index)
1756 {
1757         if (index < 0)
1758                 return 0;
1759         if (index >= IWL_MAX_GAIN_ENTRIES)
1760                 return IWL_MAX_GAIN_ENTRIES - 1;
1761         return (u8) index;
1762 }
1763
1764 /* Kick off thermal recalibration check every 60 seconds */
1765 #define REG_RECALIB_PERIOD (60)
1766
1767 /**
1768  * iwl3945_hw_reg_set_scan_power - Set Tx power for scan probe requests
1769  *
1770  * Set (in our channel info database) the direct scan Tx power for 1 Mbit (CCK)
1771  * or 6 Mbit (OFDM) rates.
1772  */
1773 static void iwl3945_hw_reg_set_scan_power(struct iwl3945_priv *priv, u32 scan_tbl_index,
1774                                s32 rate_index, const s8 *clip_pwrs,
1775                                struct iwl3945_channel_info *ch_info,
1776                                int band_index)
1777 {
1778         struct iwl3945_scan_power_info *scan_power_info;
1779         s8 power;
1780         u8 power_index;
1781
1782         scan_power_info = &ch_info->scan_pwr_info[scan_tbl_index];
1783
1784         /* use this channel group's 6Mbit clipping/saturation pwr,
1785          *   but cap at regulatory scan power restriction (set during init
1786          *   based on eeprom channel data) for this channel.  */
1787         power = min(ch_info->scan_power, clip_pwrs[IWL_RATE_6M_INDEX_TABLE]);
1788
1789         /* further limit to user's max power preference.
1790          * FIXME:  Other spectrum management power limitations do not
1791          *   seem to apply?? */
1792         power = min(power, priv->user_txpower_limit);
1793         scan_power_info->requested_power = power;
1794
1795         /* find difference between new scan *power* and current "normal"
1796          *   Tx *power* for 6Mb.  Use this difference (x2) to adjust the
1797          *   current "normal" temperature-compensated Tx power *index* for
1798          *   this rate (1Mb or 6Mb) to yield new temp-compensated scan power
1799          *   *index*. */
1800         power_index = ch_info->power_info[rate_index].power_table_index
1801             - (power - ch_info->power_info
1802                [IWL_RATE_6M_INDEX_TABLE].requested_power) * 2;
1803
1804         /* store reference index that we use when adjusting *all* scan
1805          *   powers.  So we can accommodate user (all channel) or spectrum
1806          *   management (single channel) power changes "between" temperature
1807          *   feedback compensation procedures.
1808          * don't force fit this reference index into gain table; it may be a
1809          *   negative number.  This will help avoid errors when we're at
1810          *   the lower bounds (highest gains, for warmest temperatures)
1811          *   of the table. */
1812
1813         /* don't exceed table bounds for "real" setting */
1814         power_index = iwl3945_hw_reg_fix_power_index(power_index);
1815
1816         scan_power_info->power_table_index = power_index;
1817         scan_power_info->tpc.tx_gain =
1818             power_gain_table[band_index][power_index].tx_gain;
1819         scan_power_info->tpc.dsp_atten =
1820             power_gain_table[band_index][power_index].dsp_atten;
1821 }
1822
1823 /**
1824  * iwl3945_hw_reg_send_txpower - fill in Tx Power command with gain settings
1825  *
1826  * Configures power settings for all rates for the current channel,
1827  * using values from channel info struct, and send to NIC
1828  */
1829 int iwl3945_hw_reg_send_txpower(struct iwl3945_priv *priv)
1830 {
1831         int rate_idx, i;
1832         const struct iwl3945_channel_info *ch_info = NULL;
1833         struct iwl3945_txpowertable_cmd txpower = {
1834                 .channel = priv->active_rxon.channel,
1835         };
1836
1837         txpower.band = (priv->band == IEEE80211_BAND_5GHZ) ? 0 : 1;
1838         ch_info = iwl3945_get_channel_info(priv,
1839                                        priv->band,
1840                                        le16_to_cpu(priv->active_rxon.channel));
1841         if (!ch_info) {
1842                 IWL_ERROR
1843                     ("Failed to get channel info for channel %d [%d]\n",
1844                      le16_to_cpu(priv->active_rxon.channel), priv->band);
1845                 return -EINVAL;
1846         }
1847
1848         if (!is_channel_valid(ch_info)) {
1849                 IWL_DEBUG_POWER("Not calling TX_PWR_TABLE_CMD on "
1850                                 "non-Tx channel.\n");
1851                 return 0;
1852         }
1853
1854         /* fill cmd with power settings for all rates for current channel */
1855         /* Fill OFDM rate */
1856         for (rate_idx = IWL_FIRST_OFDM_RATE, i = 0;
1857              rate_idx <= IWL_LAST_OFDM_RATE; rate_idx++, i++) {
1858
1859                 txpower.power[i].tpc = ch_info->power_info[i].tpc;
1860                 txpower.power[i].rate = iwl3945_rates[rate_idx].plcp;
1861
1862                 IWL_DEBUG_POWER("ch %d:%d rf %d dsp %3d rate code 0x%02x\n",
1863                                 le16_to_cpu(txpower.channel),
1864                                 txpower.band,
1865                                 txpower.power[i].tpc.tx_gain,
1866                                 txpower.power[i].tpc.dsp_atten,
1867                                 txpower.power[i].rate);
1868         }
1869         /* Fill CCK rates */
1870         for (rate_idx = IWL_FIRST_CCK_RATE;
1871              rate_idx <= IWL_LAST_CCK_RATE; rate_idx++, i++) {
1872                 txpower.power[i].tpc = ch_info->power_info[i].tpc;
1873                 txpower.power[i].rate = iwl3945_rates[rate_idx].plcp;
1874
1875                 IWL_DEBUG_POWER("ch %d:%d rf %d dsp %3d rate code 0x%02x\n",
1876                                 le16_to_cpu(txpower.channel),
1877                                 txpower.band,
1878                                 txpower.power[i].tpc.tx_gain,
1879                                 txpower.power[i].tpc.dsp_atten,
1880                                 txpower.power[i].rate);
1881         }
1882
1883         return iwl3945_send_cmd_pdu(priv, REPLY_TX_PWR_TABLE_CMD,
1884                         sizeof(struct iwl3945_txpowertable_cmd), &txpower);
1885
1886 }
1887
1888 /**
1889  * iwl3945_hw_reg_set_new_power - Configures power tables at new levels
1890  * @ch_info: Channel to update.  Uses power_info.requested_power.
1891  *
1892  * Replace requested_power and base_power_index ch_info fields for
1893  * one channel.
1894  *
1895  * Called if user or spectrum management changes power preferences.
1896  * Takes into account h/w and modulation limitations (clip power).
1897  *
1898  * This does *not* send anything to NIC, just sets up ch_info for one channel.
1899  *
1900  * NOTE: reg_compensate_for_temperature_dif() *must* be run after this to
1901  *       properly fill out the scan powers, and actual h/w gain settings,
1902  *       and send changes to NIC
1903  */
1904 static int iwl3945_hw_reg_set_new_power(struct iwl3945_priv *priv,
1905                              struct iwl3945_channel_info *ch_info)
1906 {
1907         struct iwl3945_channel_power_info *power_info;
1908         int power_changed = 0;
1909         int i;
1910         const s8 *clip_pwrs;
1911         int power;
1912
1913         /* Get this chnlgrp's rate-to-max/clip-powers table */
1914         clip_pwrs = priv->clip_groups[ch_info->group_index].clip_powers;
1915
1916         /* Get this channel's rate-to-current-power settings table */
1917         power_info = ch_info->power_info;
1918
1919         /* update OFDM Txpower settings */
1920         for (i = IWL_RATE_6M_INDEX_TABLE; i <= IWL_RATE_54M_INDEX_TABLE;
1921              i++, ++power_info) {
1922                 int delta_idx;
1923
1924                 /* limit new power to be no more than h/w capability */
1925                 power = min(ch_info->curr_txpow, clip_pwrs[i]);
1926                 if (power == power_info->requested_power)
1927                         continue;
1928
1929                 /* find difference between old and new requested powers,
1930                  *    update base (non-temp-compensated) power index */
1931                 delta_idx = (power - power_info->requested_power) * 2;
1932                 power_info->base_power_index -= delta_idx;
1933
1934                 /* save new requested power value */
1935                 power_info->requested_power = power;
1936
1937                 power_changed = 1;
1938         }
1939
1940         /* update CCK Txpower settings, based on OFDM 12M setting ...
1941          *    ... all CCK power settings for a given channel are the *same*. */
1942         if (power_changed) {
1943                 power =
1944                     ch_info->power_info[IWL_RATE_12M_INDEX_TABLE].
1945                     requested_power + IWL_CCK_FROM_OFDM_POWER_DIFF;
1946
1947                 /* do all CCK rates' iwl3945_channel_power_info structures */
1948                 for (i = IWL_RATE_1M_INDEX_TABLE; i <= IWL_RATE_11M_INDEX_TABLE; i++) {
1949                         power_info->requested_power = power;
1950                         power_info->base_power_index =
1951                             ch_info->power_info[IWL_RATE_12M_INDEX_TABLE].
1952                             base_power_index + IWL_CCK_FROM_OFDM_INDEX_DIFF;
1953                         ++power_info;
1954                 }
1955         }
1956
1957         return 0;
1958 }
1959
1960 /**
1961  * iwl3945_hw_reg_get_ch_txpower_limit - returns new power limit for channel
1962  *
1963  * NOTE: Returned power limit may be less (but not more) than requested,
1964  *       based strictly on regulatory (eeprom and spectrum mgt) limitations
1965  *       (no consideration for h/w clipping limitations).
1966  */
1967 static int iwl3945_hw_reg_get_ch_txpower_limit(struct iwl3945_channel_info *ch_info)
1968 {
1969         s8 max_power;
1970
1971 #if 0
1972         /* if we're using TGd limits, use lower of TGd or EEPROM */
1973         if (ch_info->tgd_data.max_power != 0)
1974                 max_power = min(ch_info->tgd_data.max_power,
1975                                 ch_info->eeprom.max_power_avg);
1976
1977         /* else just use EEPROM limits */
1978         else
1979 #endif
1980                 max_power = ch_info->eeprom.max_power_avg;
1981
1982         return min(max_power, ch_info->max_power_avg);
1983 }
1984
1985 /**
1986  * iwl3945_hw_reg_comp_txpower_temp - Compensate for temperature
1987  *
1988  * Compensate txpower settings of *all* channels for temperature.
1989  * This only accounts for the difference between current temperature
1990  *   and the factory calibration temperatures, and bases the new settings
1991  *   on the channel's base_power_index.
1992  *
1993  * If RxOn is "associated", this sends the new Txpower to NIC!
1994  */
1995 static int iwl3945_hw_reg_comp_txpower_temp(struct iwl3945_priv *priv)
1996 {
1997         struct iwl3945_channel_info *ch_info = NULL;
1998         int delta_index;
1999         const s8 *clip_pwrs; /* array of h/w max power levels for each rate */
2000         u8 a_band;
2001         u8 rate_index;
2002         u8 scan_tbl_index;
2003         u8 i;
2004         int ref_temp;
2005         int temperature = priv->temperature;
2006
2007         /* set up new Tx power info for each and every channel, 2.4 and 5.x */
2008         for (i = 0; i < priv->channel_count; i++) {
2009                 ch_info = &priv->channel_info[i];
2010                 a_band = is_channel_a_band(ch_info);
2011
2012                 /* Get this chnlgrp's factory calibration temperature */
2013                 ref_temp = (s16)priv->eeprom.groups[ch_info->group_index].
2014                     temperature;
2015
2016                 /* get power index adjustment based on curr and factory
2017                  * temps */
2018                 delta_index = iwl3945_hw_reg_adjust_power_by_temp(temperature,
2019                                                               ref_temp);
2020
2021                 /* set tx power value for all rates, OFDM and CCK */
2022                 for (rate_index = 0; rate_index < IWL_RATE_COUNT;
2023                      rate_index++) {
2024                         int power_idx =
2025                             ch_info->power_info[rate_index].base_power_index;
2026
2027                         /* temperature compensate */
2028                         power_idx += delta_index;
2029
2030                         /* stay within table range */
2031                         power_idx = iwl3945_hw_reg_fix_power_index(power_idx);
2032                         ch_info->power_info[rate_index].
2033                             power_table_index = (u8) power_idx;
2034                         ch_info->power_info[rate_index].tpc =
2035                             power_gain_table[a_band][power_idx];
2036                 }
2037
2038                 /* Get this chnlgrp's rate-to-max/clip-powers table */
2039                 clip_pwrs = priv->clip_groups[ch_info->group_index].clip_powers;
2040
2041                 /* set scan tx power, 1Mbit for CCK, 6Mbit for OFDM */
2042                 for (scan_tbl_index = 0;
2043                      scan_tbl_index < IWL_NUM_SCAN_RATES; scan_tbl_index++) {
2044                         s32 actual_index = (scan_tbl_index == 0) ?
2045                             IWL_RATE_1M_INDEX_TABLE : IWL_RATE_6M_INDEX_TABLE;
2046                         iwl3945_hw_reg_set_scan_power(priv, scan_tbl_index,
2047                                            actual_index, clip_pwrs,
2048                                            ch_info, a_band);
2049                 }
2050         }
2051
2052         /* send Txpower command for current channel to ucode */
2053         return iwl3945_hw_reg_send_txpower(priv);
2054 }
2055
2056 int iwl3945_hw_reg_set_txpower(struct iwl3945_priv *priv, s8 power)
2057 {
2058         struct iwl3945_channel_info *ch_info;
2059         s8 max_power;
2060         u8 a_band;
2061         u8 i;
2062
2063         if (priv->user_txpower_limit == power) {
2064                 IWL_DEBUG_POWER("Requested Tx power same as current "
2065                                 "limit: %ddBm.\n", power);
2066                 return 0;
2067         }
2068
2069         IWL_DEBUG_POWER("Setting upper limit clamp to %ddBm.\n", power);
2070         priv->user_txpower_limit = power;
2071
2072         /* set up new Tx powers for each and every channel, 2.4 and 5.x */
2073
2074         for (i = 0; i < priv->channel_count; i++) {
2075                 ch_info = &priv->channel_info[i];
2076                 a_band = is_channel_a_band(ch_info);
2077
2078                 /* find minimum power of all user and regulatory constraints
2079                  *    (does not consider h/w clipping limitations) */
2080                 max_power = iwl3945_hw_reg_get_ch_txpower_limit(ch_info);
2081                 max_power = min(power, max_power);
2082                 if (max_power != ch_info->curr_txpow) {
2083                         ch_info->curr_txpow = max_power;
2084
2085                         /* this considers the h/w clipping limitations */
2086                         iwl3945_hw_reg_set_new_power(priv, ch_info);
2087                 }
2088         }
2089
2090         /* update txpower settings for all channels,
2091          *   send to NIC if associated. */
2092         is_temp_calib_needed(priv);
2093         iwl3945_hw_reg_comp_txpower_temp(priv);
2094
2095         return 0;
2096 }
2097
2098 /* will add 3945 channel switch cmd handling later */
2099 int iwl3945_hw_channel_switch(struct iwl3945_priv *priv, u16 channel)
2100 {
2101         return 0;
2102 }
2103
2104 /**
2105  * iwl3945_reg_txpower_periodic -  called when time to check our temperature.
2106  *
2107  * -- reset periodic timer
2108  * -- see if temp has changed enough to warrant re-calibration ... if so:
2109  *     -- correct coeffs for temp (can reset temp timer)
2110  *     -- save this temp as "last",
2111  *     -- send new set of gain settings to NIC
2112  * NOTE:  This should continue working, even when we're not associated,
2113  *   so we can keep our internal table of scan powers current. */
2114 void iwl3945_reg_txpower_periodic(struct iwl3945_priv *priv)
2115 {
2116         /* This will kick in the "brute force"
2117          * iwl3945_hw_reg_comp_txpower_temp() below */
2118         if (!is_temp_calib_needed(priv))
2119                 goto reschedule;
2120
2121         /* Set up a new set of temp-adjusted TxPowers, send to NIC.
2122          * This is based *only* on current temperature,
2123          * ignoring any previous power measurements */
2124         iwl3945_hw_reg_comp_txpower_temp(priv);
2125
2126  reschedule:
2127         queue_delayed_work(priv->workqueue,
2128                            &priv->thermal_periodic, REG_RECALIB_PERIOD * HZ);
2129 }
2130
2131 static void iwl3945_bg_reg_txpower_periodic(struct work_struct *work)
2132 {
2133         struct iwl3945_priv *priv = container_of(work, struct iwl3945_priv,
2134                                              thermal_periodic.work);
2135
2136         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2137                 return;
2138
2139         mutex_lock(&priv->mutex);
2140         iwl3945_reg_txpower_periodic(priv);
2141         mutex_unlock(&priv->mutex);
2142 }
2143
2144 /**
2145  * iwl3945_hw_reg_get_ch_grp_index - find the channel-group index (0-4)
2146  *                                 for the channel.
2147  *
2148  * This function is used when initializing channel-info structs.
2149  *
2150  * NOTE: These channel groups do *NOT* match the bands above!
2151  *       These channel groups are based on factory-tested channels;
2152  *       on A-band, EEPROM's "group frequency" entries represent the top
2153  *       channel in each group 1-4.  Group 5 All B/G channels are in group 0.
2154  */
2155 static u16 iwl3945_hw_reg_get_ch_grp_index(struct iwl3945_priv *priv,
2156                                        const struct iwl3945_channel_info *ch_info)
2157 {
2158         struct iwl3945_eeprom_txpower_group *ch_grp = &priv->eeprom.groups[0];
2159         u8 group;
2160         u16 group_index = 0;    /* based on factory calib frequencies */
2161         u8 grp_channel;
2162
2163         /* Find the group index for the channel ... don't use index 1(?) */
2164         if (is_channel_a_band(ch_info)) {
2165                 for (group = 1; group < 5; group++) {
2166                         grp_channel = ch_grp[group].group_channel;
2167                         if (ch_info->channel <= grp_channel) {
2168                                 group_index = group;
2169                                 break;
2170                         }
2171                 }
2172                 /* group 4 has a few channels *above* its factory cal freq */
2173                 if (group == 5)
2174                         group_index = 4;
2175         } else
2176                 group_index = 0;        /* 2.4 GHz, group 0 */
2177
2178         IWL_DEBUG_POWER("Chnl %d mapped to grp %d\n", ch_info->channel,
2179                         group_index);
2180         return group_index;
2181 }
2182
2183 /**
2184  * iwl3945_hw_reg_get_matched_power_index - Interpolate to get nominal index
2185  *
2186  * Interpolate to get nominal (i.e. at factory calibration temperature) index
2187  *   into radio/DSP gain settings table for requested power.
2188  */
2189 static int iwl3945_hw_reg_get_matched_power_index(struct iwl3945_priv *priv,
2190                                        s8 requested_power,
2191                                        s32 setting_index, s32 *new_index)
2192 {
2193         const struct iwl3945_eeprom_txpower_group *chnl_grp = NULL;
2194         s32 index0, index1;
2195         s32 power = 2 * requested_power;
2196         s32 i;
2197         const struct iwl3945_eeprom_txpower_sample *samples;
2198         s32 gains0, gains1;
2199         s32 res;
2200         s32 denominator;
2201
2202         chnl_grp = &priv->eeprom.groups[setting_index];
2203         samples = chnl_grp->samples;
2204         for (i = 0; i < 5; i++) {
2205                 if (power == samples[i].power) {
2206                         *new_index = samples[i].gain_index;
2207                         return 0;
2208                 }
2209         }
2210
2211         if (power > samples[1].power) {
2212                 index0 = 0;
2213                 index1 = 1;
2214         } else if (power > samples[2].power) {
2215                 index0 = 1;
2216                 index1 = 2;
2217         } else if (power > samples[3].power) {
2218                 index0 = 2;
2219                 index1 = 3;
2220         } else {
2221                 index0 = 3;
2222                 index1 = 4;
2223         }
2224
2225         denominator = (s32) samples[index1].power - (s32) samples[index0].power;
2226         if (denominator == 0)
2227                 return -EINVAL;
2228         gains0 = (s32) samples[index0].gain_index * (1 << 19);
2229         gains1 = (s32) samples[index1].gain_index * (1 << 19);
2230         res = gains0 + (gains1 - gains0) *
2231             ((s32) power - (s32) samples[index0].power) / denominator +
2232             (1 << 18);
2233         *new_index = res >> 19;
2234         return 0;
2235 }
2236
2237 static void iwl3945_hw_reg_init_channel_groups(struct iwl3945_priv *priv)
2238 {
2239         u32 i;
2240         s32 rate_index;
2241         const struct iwl3945_eeprom_txpower_group *group;
2242
2243         IWL_DEBUG_POWER("Initializing factory calib info from EEPROM\n");
2244
2245         for (i = 0; i < IWL_NUM_TX_CALIB_GROUPS; i++) {
2246                 s8 *clip_pwrs;  /* table of power levels for each rate */
2247                 s8 satur_pwr;   /* saturation power for each chnl group */
2248                 group = &priv->eeprom.groups[i];
2249
2250                 /* sanity check on factory saturation power value */
2251                 if (group->saturation_power < 40) {
2252                         IWL_WARNING("Error: saturation power is %d, "
2253                                     "less than minimum expected 40\n",
2254                                     group->saturation_power);
2255                         return;
2256                 }
2257
2258                 /*
2259                  * Derive requested power levels for each rate, based on
2260                  *   hardware capabilities (saturation power for band).
2261                  * Basic value is 3dB down from saturation, with further
2262                  *   power reductions for highest 3 data rates.  These
2263                  *   backoffs provide headroom for high rate modulation
2264                  *   power peaks, without too much distortion (clipping).
2265                  */
2266                 /* we'll fill in this array with h/w max power levels */
2267                 clip_pwrs = (s8 *) priv->clip_groups[i].clip_powers;
2268
2269                 /* divide factory saturation power by 2 to find -3dB level */
2270                 satur_pwr = (s8) (group->saturation_power >> 1);
2271
2272                 /* fill in channel group's nominal powers for each rate */
2273                 for (rate_index = 0;
2274                      rate_index < IWL_RATE_COUNT; rate_index++, clip_pwrs++) {
2275                         switch (rate_index) {
2276                         case IWL_RATE_36M_INDEX_TABLE:
2277                                 if (i == 0)     /* B/G */
2278                                         *clip_pwrs = satur_pwr;
2279                                 else    /* A */
2280                                         *clip_pwrs = satur_pwr - 5;
2281                                 break;
2282                         case IWL_RATE_48M_INDEX_TABLE:
2283                                 if (i == 0)
2284                                         *clip_pwrs = satur_pwr - 7;
2285                                 else
2286                                         *clip_pwrs = satur_pwr - 10;
2287                                 break;
2288                         case IWL_RATE_54M_INDEX_TABLE:
2289                                 if (i == 0)
2290                                         *clip_pwrs = satur_pwr - 9;
2291                                 else
2292                                         *clip_pwrs = satur_pwr - 12;
2293                                 break;
2294                         default:
2295                                 *clip_pwrs = satur_pwr;
2296                                 break;
2297                         }
2298                 }
2299         }
2300 }
2301
2302 /**
2303  * iwl3945_txpower_set_from_eeprom - Set channel power info based on EEPROM
2304  *
2305  * Second pass (during init) to set up priv->channel_info
2306  *
2307  * Set up Tx-power settings in our channel info database for each VALID
2308  * (for this geo/SKU) channel, at all Tx data rates, based on eeprom values
2309  * and current temperature.
2310  *
2311  * Since this is based on current temperature (at init time), these values may
2312  * not be valid for very long, but it gives us a starting/default point,
2313  * and allows us to active (i.e. using Tx) scan.
2314  *
2315  * This does *not* write values to NIC, just sets up our internal table.
2316  */
2317 int iwl3945_txpower_set_from_eeprom(struct iwl3945_priv *priv)
2318 {
2319         struct iwl3945_channel_info *ch_info = NULL;
2320         struct iwl3945_channel_power_info *pwr_info;
2321         int delta_index;
2322         u8 rate_index;
2323         u8 scan_tbl_index;
2324         const s8 *clip_pwrs;    /* array of power levels for each rate */
2325         u8 gain, dsp_atten;
2326         s8 power;
2327         u8 pwr_index, base_pwr_index, a_band;
2328         u8 i;
2329         int temperature;
2330
2331         /* save temperature reference,
2332          *   so we can determine next time to calibrate */
2333         temperature = iwl3945_hw_reg_txpower_get_temperature(priv);
2334         priv->last_temperature = temperature;
2335
2336         iwl3945_hw_reg_init_channel_groups(priv);
2337
2338         /* initialize Tx power info for each and every channel, 2.4 and 5.x */
2339         for (i = 0, ch_info = priv->channel_info; i < priv->channel_count;
2340              i++, ch_info++) {
2341                 a_band = is_channel_a_band(ch_info);
2342                 if (!is_channel_valid(ch_info))
2343                         continue;
2344
2345                 /* find this channel's channel group (*not* "band") index */
2346                 ch_info->group_index =
2347                         iwl3945_hw_reg_get_ch_grp_index(priv, ch_info);
2348
2349                 /* Get this chnlgrp's rate->max/clip-powers table */
2350                 clip_pwrs = priv->clip_groups[ch_info->group_index].clip_powers;
2351
2352                 /* calculate power index *adjustment* value according to
2353                  *  diff between current temperature and factory temperature */
2354                 delta_index = iwl3945_hw_reg_adjust_power_by_temp(temperature,
2355                                 priv->eeprom.groups[ch_info->group_index].
2356                                 temperature);
2357
2358                 IWL_DEBUG_POWER("Delta index for channel %d: %d [%d]\n",
2359                                 ch_info->channel, delta_index, temperature +
2360                                 IWL_TEMP_CONVERT);
2361
2362                 /* set tx power value for all OFDM rates */
2363                 for (rate_index = 0; rate_index < IWL_OFDM_RATES;
2364                      rate_index++) {
2365                         s32 power_idx;
2366                         int rc;
2367
2368                         /* use channel group's clip-power table,
2369                          *   but don't exceed channel's max power */
2370                         s8 pwr = min(ch_info->max_power_avg,
2371                                      clip_pwrs[rate_index]);
2372
2373                         pwr_info = &ch_info->power_info[rate_index];
2374
2375                         /* get base (i.e. at factory-measured temperature)
2376                          *    power table index for this rate's power */
2377                         rc = iwl3945_hw_reg_get_matched_power_index(priv, pwr,
2378                                                          ch_info->group_index,
2379                                                          &power_idx);
2380                         if (rc) {
2381                                 IWL_ERROR("Invalid power index\n");
2382                                 return rc;
2383                         }
2384                         pwr_info->base_power_index = (u8) power_idx;
2385
2386                         /* temperature compensate */
2387                         power_idx += delta_index;
2388
2389                         /* stay within range of gain table */
2390                         power_idx = iwl3945_hw_reg_fix_power_index(power_idx);
2391
2392                         /* fill 1 OFDM rate's iwl3945_channel_power_info struct */
2393                         pwr_info->requested_power = pwr;
2394                         pwr_info->power_table_index = (u8) power_idx;
2395                         pwr_info->tpc.tx_gain =
2396                             power_gain_table[a_band][power_idx].tx_gain;
2397                         pwr_info->tpc.dsp_atten =
2398                             power_gain_table[a_band][power_idx].dsp_atten;
2399                 }
2400
2401                 /* set tx power for CCK rates, based on OFDM 12 Mbit settings*/
2402                 pwr_info = &ch_info->power_info[IWL_RATE_12M_INDEX_TABLE];
2403                 power = pwr_info->requested_power +
2404                         IWL_CCK_FROM_OFDM_POWER_DIFF;
2405                 pwr_index = pwr_info->power_table_index +
2406                         IWL_CCK_FROM_OFDM_INDEX_DIFF;
2407                 base_pwr_index = pwr_info->base_power_index +
2408                         IWL_CCK_FROM_OFDM_INDEX_DIFF;
2409
2410                 /* stay within table range */
2411                 pwr_index = iwl3945_hw_reg_fix_power_index(pwr_index);
2412                 gain = power_gain_table[a_band][pwr_index].tx_gain;
2413                 dsp_atten = power_gain_table[a_band][pwr_index].dsp_atten;
2414
2415                 /* fill each CCK rate's iwl3945_channel_power_info structure
2416                  * NOTE:  All CCK-rate Txpwrs are the same for a given chnl!
2417                  * NOTE:  CCK rates start at end of OFDM rates! */
2418                 for (rate_index = 0;
2419                      rate_index < IWL_CCK_RATES; rate_index++) {
2420                         pwr_info = &ch_info->power_info[rate_index+IWL_OFDM_RATES];
2421                         pwr_info->requested_power = power;
2422                         pwr_info->power_table_index = pwr_index;
2423                         pwr_info->base_power_index = base_pwr_index;
2424                         pwr_info->tpc.tx_gain = gain;
2425                         pwr_info->tpc.dsp_atten = dsp_atten;
2426                 }
2427
2428                 /* set scan tx power, 1Mbit for CCK, 6Mbit for OFDM */
2429                 for (scan_tbl_index = 0;
2430                      scan_tbl_index < IWL_NUM_SCAN_RATES; scan_tbl_index++) {
2431                         s32 actual_index = (scan_tbl_index == 0) ?
2432                                 IWL_RATE_1M_INDEX_TABLE : IWL_RATE_6M_INDEX_TABLE;
2433                         iwl3945_hw_reg_set_scan_power(priv, scan_tbl_index,
2434                                 actual_index, clip_pwrs, ch_info, a_band);
2435                 }
2436         }
2437
2438         return 0;
2439 }
2440
2441 int iwl3945_hw_rxq_stop(struct iwl3945_priv *priv)
2442 {
2443         int rc;
2444         unsigned long flags;
2445
2446         spin_lock_irqsave(&priv->lock, flags);
2447         rc = iwl3945_grab_nic_access(priv);
2448         if (rc) {
2449                 spin_unlock_irqrestore(&priv->lock, flags);
2450                 return rc;
2451         }
2452
2453         iwl3945_write_direct32(priv, FH_RCSR_CONFIG(0), 0);
2454         rc = iwl3945_poll_direct_bit(priv, FH_RSSR_STATUS, (1 << 24), 1000);
2455         if (rc < 0)
2456                 IWL_ERROR("Can't stop Rx DMA.\n");
2457
2458         iwl3945_release_nic_access(priv);
2459         spin_unlock_irqrestore(&priv->lock, flags);
2460
2461         return 0;
2462 }
2463
2464 int iwl3945_hw_tx_queue_init(struct iwl3945_priv *priv, struct iwl3945_tx_queue *txq)
2465 {
2466         int rc;
2467         unsigned long flags;
2468         int txq_id = txq->q.id;
2469
2470         struct iwl3945_shared *shared_data = priv->hw_setting.shared_virt;
2471
2472         shared_data->tx_base_ptr[txq_id] = cpu_to_le32((u32)txq->q.dma_addr);
2473
2474         spin_lock_irqsave(&priv->lock, flags);
2475         rc = iwl3945_grab_nic_access(priv);
2476         if (rc) {
2477                 spin_unlock_irqrestore(&priv->lock, flags);
2478                 return rc;
2479         }
2480         iwl3945_write_direct32(priv, FH_CBCC_CTRL(txq_id), 0);
2481         iwl3945_write_direct32(priv, FH_CBCC_BASE(txq_id), 0);
2482
2483         iwl3945_write_direct32(priv, FH_TCSR_CONFIG(txq_id),
2484                 ALM_FH_TCSR_TX_CONFIG_REG_VAL_CIRQ_RTC_NOINT |
2485                 ALM_FH_TCSR_TX_CONFIG_REG_VAL_MSG_MODE_TXF |
2486                 ALM_FH_TCSR_TX_CONFIG_REG_VAL_CIRQ_HOST_IFTFD |
2487                 ALM_FH_TCSR_TX_CONFIG_REG_VAL_DMA_CREDIT_ENABLE_VAL |
2488                 ALM_FH_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_ENABLE);
2489         iwl3945_release_nic_access(priv);
2490
2491         /* fake read to flush all prev. writes */
2492         iwl3945_read32(priv, FH_TSSR_CBB_BASE);
2493         spin_unlock_irqrestore(&priv->lock, flags);
2494
2495         return 0;
2496 }
2497
2498 int iwl3945_hw_get_rx_read(struct iwl3945_priv *priv)
2499 {
2500         struct iwl3945_shared *shared_data = priv->hw_setting.shared_virt;
2501
2502         return le32_to_cpu(shared_data->rx_read_ptr[0]);
2503 }
2504
2505 /**
2506  * iwl3945_init_hw_rate_table - Initialize the hardware rate fallback table
2507  */
2508 int iwl3945_init_hw_rate_table(struct iwl3945_priv *priv)
2509 {
2510         int rc, i, index, prev_index;
2511         struct iwl3945_rate_scaling_cmd rate_cmd = {
2512                 .reserved = {0, 0, 0},
2513         };
2514         struct iwl3945_rate_scaling_info *table = rate_cmd.table;
2515
2516         for (i = 0; i < ARRAY_SIZE(iwl3945_rates); i++) {
2517                 index = iwl3945_rates[i].table_rs_index;
2518
2519                 table[index].rate_n_flags =
2520                         iwl3945_hw_set_rate_n_flags(iwl3945_rates[i].plcp, 0);
2521                 table[index].try_cnt = priv->retry_rate;
2522                 prev_index = iwl3945_get_prev_ieee_rate(i);
2523                 table[index].next_rate_index = iwl3945_rates[prev_index].table_rs_index;
2524         }
2525
2526         switch (priv->band) {
2527         case IEEE80211_BAND_5GHZ:
2528                 IWL_DEBUG_RATE("Select A mode rate scale\n");
2529                 /* If one of the following CCK rates is used,
2530                  * have it fall back to the 6M OFDM rate */
2531                 for (i = IWL_RATE_1M_INDEX_TABLE; i <= IWL_RATE_11M_INDEX_TABLE; i++)
2532                         table[i].next_rate_index = iwl3945_rates[IWL_FIRST_OFDM_RATE].table_rs_index;
2533
2534                 /* Don't fall back to CCK rates */
2535                 table[IWL_RATE_12M_INDEX_TABLE].next_rate_index = IWL_RATE_9M_INDEX_TABLE;
2536
2537                 /* Don't drop out of OFDM rates */
2538                 table[IWL_RATE_6M_INDEX_TABLE].next_rate_index =
2539                     iwl3945_rates[IWL_FIRST_OFDM_RATE].table_rs_index;
2540                 break;
2541
2542         case IEEE80211_BAND_2GHZ:
2543                 IWL_DEBUG_RATE("Select B/G mode rate scale\n");
2544                 /* If an OFDM rate is used, have it fall back to the
2545                  * 1M CCK rates */
2546                 for (i = IWL_RATE_6M_INDEX_TABLE; i <= IWL_RATE_54M_INDEX_TABLE; i++)
2547                         table[i].next_rate_index = iwl3945_rates[IWL_FIRST_CCK_RATE].table_rs_index;
2548
2549                 /* CCK shouldn't fall back to OFDM... */
2550                 table[IWL_RATE_11M_INDEX_TABLE].next_rate_index = IWL_RATE_5M_INDEX_TABLE;
2551                 break;
2552
2553         default:
2554                 WARN_ON(1);
2555                 break;
2556         }
2557
2558         /* Update the rate scaling for control frame Tx */
2559         rate_cmd.table_id = 0;
2560         rc = iwl3945_send_cmd_pdu(priv, REPLY_RATE_SCALE, sizeof(rate_cmd),
2561                               &rate_cmd);
2562         if (rc)
2563                 return rc;
2564
2565         /* Update the rate scaling for data frame Tx */
2566         rate_cmd.table_id = 1;
2567         return iwl3945_send_cmd_pdu(priv, REPLY_RATE_SCALE, sizeof(rate_cmd),
2568                                 &rate_cmd);
2569 }
2570
2571 /* Called when initializing driver */
2572 int iwl3945_hw_set_hw_setting(struct iwl3945_priv *priv)
2573 {
2574         memset((void *)&priv->hw_setting, 0,
2575                sizeof(struct iwl3945_driver_hw_info));
2576
2577         priv->hw_setting.shared_virt =
2578             pci_alloc_consistent(priv->pci_dev,
2579                                  sizeof(struct iwl3945_shared),
2580                                  &priv->hw_setting.shared_phys);
2581
2582         if (!priv->hw_setting.shared_virt) {
2583                 IWL_ERROR("failed to allocate pci memory\n");
2584                 mutex_unlock(&priv->mutex);
2585                 return -ENOMEM;
2586         }
2587
2588         priv->hw_setting.rx_buf_size = IWL_RX_BUF_SIZE;
2589         priv->hw_setting.max_pkt_size = 2342;
2590         priv->hw_setting.tx_cmd_len = sizeof(struct iwl3945_tx_cmd);
2591         priv->hw_setting.max_rxq_size = RX_QUEUE_SIZE;
2592         priv->hw_setting.max_rxq_log = RX_QUEUE_SIZE_LOG;
2593         priv->hw_setting.max_stations = IWL3945_STATION_COUNT;
2594         priv->hw_setting.bcast_sta_id = IWL3945_BROADCAST_ID;
2595
2596         priv->hw_setting.tx_ant_num = 2;
2597         return 0;
2598 }
2599
2600 unsigned int iwl3945_hw_get_beacon_cmd(struct iwl3945_priv *priv,
2601                           struct iwl3945_frame *frame, u8 rate)
2602 {
2603         struct iwl3945_tx_beacon_cmd *tx_beacon_cmd;
2604         unsigned int frame_size;
2605
2606         tx_beacon_cmd = (struct iwl3945_tx_beacon_cmd *)&frame->u;
2607         memset(tx_beacon_cmd, 0, sizeof(*tx_beacon_cmd));
2608
2609         tx_beacon_cmd->tx.sta_id = priv->hw_setting.bcast_sta_id;
2610         tx_beacon_cmd->tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2611
2612         frame_size = iwl3945_fill_beacon_frame(priv,
2613                                 tx_beacon_cmd->frame,
2614                                 iwl3945_broadcast_addr,
2615                                 sizeof(frame->u) - sizeof(*tx_beacon_cmd));
2616
2617         BUG_ON(frame_size > MAX_MPDU_SIZE);
2618         tx_beacon_cmd->tx.len = cpu_to_le16((u16)frame_size);
2619
2620         tx_beacon_cmd->tx.rate = rate;
2621         tx_beacon_cmd->tx.tx_flags = (TX_CMD_FLG_SEQ_CTL_MSK |
2622                                       TX_CMD_FLG_TSF_MSK);
2623
2624         /* supp_rates[0] == OFDM start at IWL_FIRST_OFDM_RATE*/
2625         tx_beacon_cmd->tx.supp_rates[0] =
2626                 (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
2627
2628         tx_beacon_cmd->tx.supp_rates[1] =
2629                 (IWL_CCK_BASIC_RATES_MASK & 0xF);
2630
2631         return sizeof(struct iwl3945_tx_beacon_cmd) + frame_size;
2632 }
2633
2634 void iwl3945_hw_rx_handler_setup(struct iwl3945_priv *priv)
2635 {
2636         priv->rx_handlers[REPLY_TX] = iwl3945_rx_reply_tx;
2637         priv->rx_handlers[REPLY_3945_RX] = iwl3945_rx_reply_rx;
2638 }
2639
2640 void iwl3945_hw_setup_deferred_work(struct iwl3945_priv *priv)
2641 {
2642         INIT_DELAYED_WORK(&priv->thermal_periodic,
2643                           iwl3945_bg_reg_txpower_periodic);
2644 }
2645
2646 void iwl3945_hw_cancel_deferred_work(struct iwl3945_priv *priv)
2647 {
2648         cancel_delayed_work(&priv->thermal_periodic);
2649 }
2650
2651 static struct iwl_3945_cfg iwl3945_bg_cfg = {
2652         .name = "3945BG",
2653         .fw_name = "iwlwifi-3945" IWL3945_UCODE_API ".ucode",
2654         .sku = IWL_SKU_G,
2655 };
2656
2657 static struct iwl_3945_cfg iwl3945_abg_cfg = {
2658         .name = "3945ABG",
2659         .fw_name = "iwlwifi-3945" IWL3945_UCODE_API ".ucode",
2660         .sku = IWL_SKU_A|IWL_SKU_G,
2661 };
2662
2663 struct pci_device_id iwl3945_hw_card_ids[] = {
2664         {IWL_PCI_DEVICE(0x4222, 0x1005, iwl3945_bg_cfg)},
2665         {IWL_PCI_DEVICE(0x4222, 0x1034, iwl3945_bg_cfg)},
2666         {IWL_PCI_DEVICE(0x4222, 0x1044, iwl3945_bg_cfg)},
2667         {IWL_PCI_DEVICE(0x4227, 0x1014, iwl3945_bg_cfg)},
2668         {IWL_PCI_DEVICE(0x4222, PCI_ANY_ID, iwl3945_abg_cfg)},
2669         {IWL_PCI_DEVICE(0x4227, PCI_ANY_ID, iwl3945_abg_cfg)},
2670         {0}
2671 };
2672
2673 MODULE_DEVICE_TABLE(pci, iwl3945_hw_card_ids);