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  *  Intel Linux Wireless <ilw@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-fh.h"
  42 #include "iwl-commands.h"
  43 #include "iwl-3945.h"
  44 #include "iwl-helpers.h"
  45 #include "iwl-core.h"
  46 #include "iwl-agn-rs.h"
  47
  48 #define IWL_DECLARE_RATE_INFO(r, ip, in, rp, rn, pp, np)    \
  49         [IWL_RATE_##r##M_INDEX] = { IWL_RATE_##r##M_PLCP,   \
  50                                     IWL_RATE_##r##M_IEEE,   \
  51                                     IWL_RATE_##ip##M_INDEX, \
  52                                     IWL_RATE_##in##M_INDEX, \
  53                                     IWL_RATE_##rp##M_INDEX, \
  54                                     IWL_RATE_##rn##M_INDEX, \
  55                                     IWL_RATE_##pp##M_INDEX, \
  56                                     IWL_RATE_##np##M_INDEX, \
  57                                     IWL_RATE_##r##M_INDEX_TABLE, \
  58                                     IWL_RATE_##ip##M_INDEX_TABLE }
  59
  60 /*
  61  * Parameter order:
  62  *   rate, prev rate, next rate, prev tgg rate, next tgg rate
  63  *
  64  * If there isn't a valid next or previous rate then INV is used which
  65  * maps to IWL_RATE_INVALID
  66  *
  67  */
  68 const struct iwl3945_rate_info iwl3945_rates[IWL_RATE_COUNT_3945] = {
  69         IWL_DECLARE_RATE_INFO(1, INV, 2, INV, 2, INV, 2),    /*  1mbps */
  70         IWL_DECLARE_RATE_INFO(2, 1, 5, 1, 5, 1, 5),          /*  2mbps */
  71         IWL_DECLARE_RATE_INFO(5, 2, 6, 2, 11, 2, 11),        /*5.5mbps */
  72         IWL_DECLARE_RATE_INFO(11, 9, 12, 5, 12, 5, 18),      /* 11mbps */
  73         IWL_DECLARE_RATE_INFO(6, 5, 9, 5, 11, 5, 11),        /*  6mbps */
  74         IWL_DECLARE_RATE_INFO(9, 6, 11, 5, 11, 5, 11),       /*  9mbps */
  75         IWL_DECLARE_RATE_INFO(12, 11, 18, 11, 18, 11, 18),   /* 12mbps */
  76         IWL_DECLARE_RATE_INFO(18, 12, 24, 12, 24, 11, 24),   /* 18mbps */
  77         IWL_DECLARE_RATE_INFO(24, 18, 36, 18, 36, 18, 36),   /* 24mbps */
  78         IWL_DECLARE_RATE_INFO(36, 24, 48, 24, 48, 24, 48),   /* 36mbps */
  79         IWL_DECLARE_RATE_INFO(48, 36, 54, 36, 54, 36, 54),   /* 48mbps */
  80         IWL_DECLARE_RATE_INFO(54, 48, INV, 48, INV, 48, INV),/* 54mbps */
  81 };
  82
  83 /* 1 = enable the iwl3945_disable_events() function */
  84 #define IWL_EVT_DISABLE (0)
  85 #define IWL_EVT_DISABLE_SIZE (1532/32)
  86
  87 /**
  88  * iwl3945_disable_events - Disable selected events in uCode event log
  89  *
  90  * Disable an event by writing "1"s into "disable"
  91  *   bitmap in SRAM.  Bit position corresponds to Event # (id/type).
  92  *   Default values of 0 enable uCode events to be logged.
  93  * Use for only special debugging.  This function is just a placeholder as-is,
  94  *   you'll need to provide the special bits! ...
  95  *   ... and set IWL_EVT_DISABLE to 1. */
  96 void iwl3945_disable_events(struct iwl_priv *priv)
  97 {
  98         int ret;
  99         int i;
 100         u32 base;               /* SRAM address of event log header */
 101         u32 disable_ptr;        /* SRAM address of event-disable bitmap array */
 102         u32 array_size;         /* # of u32 entries in array */
 103         u32 evt_disable[IWL_EVT_DISABLE_SIZE] = {
 104                 0x00000000,     /*   31 -    0  Event id numbers */
 105                 0x00000000,     /*   63 -   32 */
 106                 0x00000000,     /*   95 -   64 */
 107                 0x00000000,     /*  127 -   96 */
 108                 0x00000000,     /*  159 -  128 */
 109                 0x00000000,     /*  191 -  160 */
 110                 0x00000000,     /*  223 -  192 */
 111                 0x00000000,     /*  255 -  224 */
 112                 0x00000000,     /*  287 -  256 */
 113                 0x00000000,     /*  319 -  288 */
 114                 0x00000000,     /*  351 -  320 */
 115                 0x00000000,     /*  383 -  352 */
 116                 0x00000000,     /*  415 -  384 */
 117                 0x00000000,     /*  447 -  416 */
 118                 0x00000000,     /*  479 -  448 */
 119                 0x00000000,     /*  511 -  480 */
 120                 0x00000000,     /*  543 -  512 */
 121                 0x00000000,     /*  575 -  544 */
 122                 0x00000000,     /*  607 -  576 */
 123                 0x00000000,     /*  639 -  608 */
 124                 0x00000000,     /*  671 -  640 */
 125                 0x00000000,     /*  703 -  672 */
 126                 0x00000000,     /*  735 -  704 */
 127                 0x00000000,     /*  767 -  736 */
 128                 0x00000000,     /*  799 -  768 */
 129                 0x00000000,     /*  831 -  800 */
 130                 0x00000000,     /*  863 -  832 */
 131                 0x00000000,     /*  895 -  864 */
 132                 0x00000000,     /*  927 -  896 */
 133                 0x00000000,     /*  959 -  928 */
 134                 0x00000000,     /*  991 -  960 */
 135                 0x00000000,     /* 1023 -  992 */
 136                 0x00000000,     /* 1055 - 1024 */
 137                 0x00000000,     /* 1087 - 1056 */
 138                 0x00000000,     /* 1119 - 1088 */
 139                 0x00000000,     /* 1151 - 1120 */
 140                 0x00000000,     /* 1183 - 1152 */
 141                 0x00000000,     /* 1215 - 1184 */
 142                 0x00000000,     /* 1247 - 1216 */
 143                 0x00000000,     /* 1279 - 1248 */
 144                 0x00000000,     /* 1311 - 1280 */
 145                 0x00000000,     /* 1343 - 1312 */
 146                 0x00000000,     /* 1375 - 1344 */
 147                 0x00000000,     /* 1407 - 1376 */
 148                 0x00000000,     /* 1439 - 1408 */
 149                 0x00000000,     /* 1471 - 1440 */
 150                 0x00000000,     /* 1503 - 1472 */
 151         };
 152
 153         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
 154         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
 155                 IWL_ERR(priv, "Invalid event log pointer 0x%08X\n", base);
 156                 return;
 157         }
 158
 159         ret = iwl_grab_nic_access(priv);
 160         if (ret) {
 161                 IWL_WARN(priv, "Can not read from adapter at this time.\n");
 162                 return;
 163         }
 164
 165         disable_ptr = iwl_read_targ_mem(priv, base + (4 * sizeof(u32)));
 166         array_size = iwl_read_targ_mem(priv, base + (5 * sizeof(u32)));
 167         iwl_release_nic_access(priv);
 168
 169         if (IWL_EVT_DISABLE && (array_size == IWL_EVT_DISABLE_SIZE)) {
 170                 IWL_DEBUG_INFO("Disabling selected uCode log events at 0x%x\n",
 171                                disable_ptr);
 172                 ret = iwl_grab_nic_access(priv);
 173                 for (i = 0; i < IWL_EVT_DISABLE_SIZE; i++)
 174                         iwl_write_targ_mem(priv,
 175                                            disable_ptr + (i * sizeof(u32)),
 176                                            evt_disable[i]);
 177
 178                 iwl_release_nic_access(priv);
 179         } else {
 180                 IWL_DEBUG_INFO("Selected uCode log events may be disabled\n");
 181                 IWL_DEBUG_INFO("  by writing \"1\"s into disable bitmap\n");
 182                 IWL_DEBUG_INFO("  in SRAM at 0x%x, size %d u32s\n",
 183                                disable_ptr, array_size);
 184         }
 185
 186 }
 187
 188 static int iwl3945_hwrate_to_plcp_idx(u8 plcp)
 189 {
 190         int idx;
 191
 192         for (idx = 0; idx < IWL_RATE_COUNT; idx++)
 193                 if (iwl3945_rates[idx].plcp == plcp)
 194                         return idx;
 195         return -1;
 196 }
 197
 198 /**
 199  * iwl3945_get_antenna_flags - Get antenna flags for RXON command
 200  * @priv: eeprom and antenna fields are used to determine antenna flags
 201  *
 202  * priv->eeprom39  is used to determine if antenna AUX/MAIN are reversed
 203  * priv->antenna specifies the antenna diversity mode:
 204  *
 205  * IWL_ANTENNA_DIVERSITY - NIC selects best antenna by itself
 206  * IWL_ANTENNA_MAIN      - Force MAIN antenna
 207  * IWL_ANTENNA_AUX       - Force AUX antenna
 208  */
 209 __le32 iwl3945_get_antenna_flags(const struct iwl_priv *priv)
 210 {
 211         switch (priv->antenna) {
 212         case IWL_ANTENNA_DIVERSITY:
 213                 return 0;
 214
 215         case IWL_ANTENNA_MAIN:
 216                 if (priv->eeprom39.antenna_switch_type)
 217                         return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_B_MSK;
 218                 return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_A_MSK;
 219
 220         case IWL_ANTENNA_AUX:
 221                 if (priv->eeprom39.antenna_switch_type)
 222                         return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_A_MSK;
 223                 return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_B_MSK;
 224         }
 225
 226         /* bad antenna selector value */
 227         IWL_ERR(priv, "Bad antenna selector value (0x%x)\n", priv->antenna);
 228         return 0;               /* "diversity" is default if error */
 229 }
 230
 231 #ifdef CONFIG_IWL3945_DEBUG
 232 #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
 233
 234 static const char *iwl3945_get_tx_fail_reason(u32 status)
 235 {
 236         switch (status & TX_STATUS_MSK) {
 237         case TX_STATUS_SUCCESS:
 238                 return "SUCCESS";
 239                 TX_STATUS_ENTRY(SHORT_LIMIT);
 240                 TX_STATUS_ENTRY(LONG_LIMIT);
 241                 TX_STATUS_ENTRY(FIFO_UNDERRUN);
 242                 TX_STATUS_ENTRY(MGMNT_ABORT);
 243                 TX_STATUS_ENTRY(NEXT_FRAG);
 244                 TX_STATUS_ENTRY(LIFE_EXPIRE);
 245                 TX_STATUS_ENTRY(DEST_PS);
 246                 TX_STATUS_ENTRY(ABORTED);
 247                 TX_STATUS_ENTRY(BT_RETRY);
 248                 TX_STATUS_ENTRY(STA_INVALID);
 249                 TX_STATUS_ENTRY(FRAG_DROPPED);
 250                 TX_STATUS_ENTRY(TID_DISABLE);
 251                 TX_STATUS_ENTRY(FRAME_FLUSHED);
 252                 TX_STATUS_ENTRY(INSUFFICIENT_CF_POLL);
 253                 TX_STATUS_ENTRY(TX_LOCKED);
 254                 TX_STATUS_ENTRY(NO_BEACON_ON_RADAR);
 255         }
 256
 257         return "UNKNOWN";
 258 }
 259 #else
 260 static inline const char *iwl3945_get_tx_fail_reason(u32 status)
 261 {
 262         return "";
 263 }
 264 #endif
 265
 266 /*
 267  * get ieee prev rate from rate scale table.
 268  * for A and B mode we need to overright prev
 269  * value
 270  */
 271 int iwl3945_rs_next_rate(struct iwl_priv *priv, int rate)
 272 {
 273         int next_rate = iwl3945_get_prev_ieee_rate(rate);
 274
 275         switch (priv->band) {
 276         case IEEE80211_BAND_5GHZ:
 277                 if (rate == IWL_RATE_12M_INDEX)
 278                         next_rate = IWL_RATE_9M_INDEX;
 279                 else if (rate == IWL_RATE_6M_INDEX)
 280                         next_rate = IWL_RATE_6M_INDEX;
 281                 break;
 282         case IEEE80211_BAND_2GHZ:
 283                 if (!(priv->sta_supp_rates & IWL_OFDM_RATES_MASK) &&
 284                     iwl3945_is_associated(priv)) {
 285                         if (rate == IWL_RATE_11M_INDEX)
 286                                 next_rate = IWL_RATE_5M_INDEX;
 287                 }
 288                 break;
 289
 290         default:
 291                 break;
 292         }
 293
 294         return next_rate;
 295 }
 296
 297
 298 /**
 299  * iwl3945_tx_queue_reclaim - Reclaim Tx queue entries already Tx'd
 300  *
 301  * When FW advances 'R' index, all entries between old and new 'R' index
 302  * need to be reclaimed. As result, some free space forms. If there is
 303  * enough free space (> low mark), wake the stack that feeds us.
 304  */
 305 static void iwl3945_tx_queue_reclaim(struct iwl_priv *priv,
 306                                      int txq_id, int index)
 307 {
 308         struct iwl3945_tx_queue *txq = &priv->txq39[txq_id];
 309         struct iwl_queue *q = &txq->q;
 310         struct iwl3945_tx_info *tx_info;
 311
 312         BUG_ON(txq_id == IWL_CMD_QUEUE_NUM);
 313
 314         for (index = iwl_queue_inc_wrap(index, q->n_bd); q->read_ptr != index;
 315                 q->read_ptr = iwl_queue_inc_wrap(q->read_ptr, q->n_bd)) {
 316
 317                 tx_info = &txq->txb[txq->q.read_ptr];
 318                 ieee80211_tx_status_irqsafe(priv->hw, tx_info->skb[0]);
 319                 tx_info->skb[0] = NULL;
 320                 iwl3945_hw_txq_free_tfd(priv, txq);
 321         }
 322
 323         if (iwl_queue_space(q) > q->low_mark && (txq_id >= 0) &&
 324                         (txq_id != IWL_CMD_QUEUE_NUM) &&
 325                         priv->mac80211_registered)
 326                 ieee80211_wake_queue(priv->hw, txq_id);
 327 }
 328
 329 /**
 330  * iwl3945_rx_reply_tx - Handle Tx response
 331  */
 332 static void iwl3945_rx_reply_tx(struct iwl_priv *priv,
 333                             struct iwl_rx_mem_buffer *rxb)
 334 {
 335         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
 336         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
 337         int txq_id = SEQ_TO_QUEUE(sequence);
 338         int index = SEQ_TO_INDEX(sequence);
 339         struct iwl3945_tx_queue *txq = &priv->txq39[txq_id];
 340         struct ieee80211_tx_info *info;
 341         struct iwl3945_tx_resp *tx_resp = (void *)&pkt->u.raw[0];
 342         u32  status = le32_to_cpu(tx_resp->status);
 343         int rate_idx;
 344         int fail;
 345
 346         if ((index >= txq->q.n_bd) || (iwl3945_x2_queue_used(&txq->q, index) == 0)) {
 347                 IWL_ERR(priv, "Read index for DMA queue txq_id (%d) index %d "
 348                           "is out of range [0-%d] %d %d\n", txq_id,
 349                           index, txq->q.n_bd, txq->q.write_ptr,
 350                           txq->q.read_ptr);
 351                 return;
 352         }
 353
 354         info = IEEE80211_SKB_CB(txq->txb[txq->q.read_ptr].skb[0]);
 355         ieee80211_tx_info_clear_status(info);
 356
 357         /* Fill the MRR chain with some info about on-chip retransmissions */
 358         rate_idx = iwl3945_hwrate_to_plcp_idx(tx_resp->rate);
 359         if (info->band == IEEE80211_BAND_5GHZ)
 360                 rate_idx -= IWL_FIRST_OFDM_RATE;
 361
 362         fail = tx_resp->failure_frame;
 363
 364         info->status.rates[0].idx = rate_idx;
 365         info->status.rates[0].count = fail + 1; /* add final attempt */
 366
 367         /* tx_status->rts_retry_count = tx_resp->failure_rts; */
 368         info->flags |= ((status & TX_STATUS_MSK) == TX_STATUS_SUCCESS) ?
 369                                 IEEE80211_TX_STAT_ACK : 0;
 370
 371         IWL_DEBUG_TX("Tx queue %d Status %s (0x%08x) plcp rate %d retries %d\n",
 372                         txq_id, iwl3945_get_tx_fail_reason(status), status,
 373                         tx_resp->rate, tx_resp->failure_frame);
 374
 375         IWL_DEBUG_TX_REPLY("Tx queue reclaim %d\n", index);
 376         iwl3945_tx_queue_reclaim(priv, txq_id, index);
 377
 378         if (iwl_check_bits(status, TX_ABORT_REQUIRED_MSK))
 379                 IWL_ERR(priv, "TODO:  Implement Tx ABORT REQUIRED!!!\n");
 380 }
 381
 382
 383
 384 /*****************************************************************************
 385  *
 386  * Intel PRO/Wireless 3945ABG/BG Network Connection
 387  *
 388  *  RX handler implementations
 389  *
 390  *****************************************************************************/
 391
 392 void iwl3945_hw_rx_statistics(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
 393 {
 394         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
 395         IWL_DEBUG_RX("Statistics notification received (%d vs %d).\n",
 396                      (int)sizeof(struct iwl3945_notif_statistics),
 397                      le32_to_cpu(pkt->len));
 398
 399         memcpy(&priv->statistics_39, pkt->u.raw, sizeof(priv->statistics_39));
 400
 401         iwl3945_led_background(priv);
 402
 403         priv->last_statistics_time = jiffies;
 404 }
 405
 406 /******************************************************************************
 407  *
 408  * Misc. internal state and helper functions
 409  *
 410  ******************************************************************************/
 411 #ifdef CONFIG_IWL3945_DEBUG
 412
 413 /**
 414  * iwl3945_report_frame - dump frame to syslog during debug sessions
 415  *
 416  * You may hack this function to show different aspects of received frames,
 417  * including selective frame dumps.
 418  * group100 parameter selects whether to show 1 out of 100 good frames.
 419  */
 420 static void iwl3945_dbg_report_frame(struct iwl_priv *priv,
 421                       struct iwl_rx_packet *pkt,
 422                       struct ieee80211_hdr *header, int group100)
 423 {
 424         u32 to_us;
 425         u32 print_summary = 0;
 426         u32 print_dump = 0;     /* set to 1 to dump all frames' contents */
 427         u32 hundred = 0;
 428         u32 dataframe = 0;
 429         __le16 fc;
 430         u16 seq_ctl;
 431         u16 channel;
 432         u16 phy_flags;
 433         u16 length;
 434         u16 status;
 435         u16 bcn_tmr;
 436         u32 tsf_low;
 437         u64 tsf;
 438         u8 rssi;
 439         u8 agc;
 440         u16 sig_avg;
 441         u16 noise_diff;
 442         struct iwl3945_rx_frame_stats *rx_stats = IWL_RX_STATS(pkt);
 443         struct iwl3945_rx_frame_hdr *rx_hdr = IWL_RX_HDR(pkt);
 444         struct iwl3945_rx_frame_end *rx_end = IWL_RX_END(pkt);
 445         u8 *data = IWL_RX_DATA(pkt);
 446
 447         /* MAC header */
 448         fc = header->frame_control;
 449         seq_ctl = le16_to_cpu(header->seq_ctrl);
 450
 451         /* metadata */
 452         channel = le16_to_cpu(rx_hdr->channel);
 453         phy_flags = le16_to_cpu(rx_hdr->phy_flags);
 454         length = le16_to_cpu(rx_hdr->len);
 455
 456         /* end-of-frame status and timestamp */
 457         status = le32_to_cpu(rx_end->status);
 458         bcn_tmr = le32_to_cpu(rx_end->beacon_timestamp);
 459         tsf_low = le64_to_cpu(rx_end->timestamp) & 0x0ffffffff;
 460         tsf = le64_to_cpu(rx_end->timestamp);
 461
 462         /* signal statistics */
 463         rssi = rx_stats->rssi;
 464         agc = rx_stats->agc;
 465         sig_avg = le16_to_cpu(rx_stats->sig_avg);
 466         noise_diff = le16_to_cpu(rx_stats->noise_diff);
 467
 468         to_us = !compare_ether_addr(header->addr1, priv->mac_addr);
 469
 470         /* if data frame is to us and all is good,
 471          *   (optionally) print summary for only 1 out of every 100 */
 472         if (to_us && (fc & ~cpu_to_le16(IEEE80211_FCTL_PROTECTED)) ==
 473             cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FTYPE_DATA)) {
 474                 dataframe = 1;
 475                 if (!group100)
 476                         print_summary = 1;      /* print each frame */
 477                 else if (priv->framecnt_to_us < 100) {
 478                         priv->framecnt_to_us++;
 479                         print_summary = 0;
 480                 } else {
 481                         priv->framecnt_to_us = 0;
 482                         print_summary = 1;
 483                         hundred = 1;
 484                 }
 485         } else {
 486                 /* print summary for all other frames */
 487                 print_summary = 1;
 488         }
 489
 490         if (print_summary) {
 491                 char *title;
 492                 int rate;
 493
 494                 if (hundred)
 495                         title = "100Frames";
 496                 else if (ieee80211_has_retry(fc))
 497                         title = "Retry";
 498                 else if (ieee80211_is_assoc_resp(fc))
 499                         title = "AscRsp";
 500                 else if (ieee80211_is_reassoc_resp(fc))
 501                         title = "RasRsp";
 502                 else if (ieee80211_is_probe_resp(fc)) {
 503                         title = "PrbRsp";
 504                         print_dump = 1; /* dump frame contents */
 505                 } else if (ieee80211_is_beacon(fc)) {
 506                         title = "Beacon";
 507                         print_dump = 1; /* dump frame contents */
 508                 } else if (ieee80211_is_atim(fc))
 509                         title = "ATIM";
 510                 else if (ieee80211_is_auth(fc))
 511                         title = "Auth";
 512                 else if (ieee80211_is_deauth(fc))
 513                         title = "DeAuth";
 514                 else if (ieee80211_is_disassoc(fc))
 515                         title = "DisAssoc";
 516                 else
 517                         title = "Frame";
 518
 519                 rate = iwl3945_hwrate_to_plcp_idx(rx_hdr->rate);
 520                 if (rate == -1)
 521                         rate = 0;
 522                 else
 523                         rate = iwl3945_rates[rate].ieee / 2;
 524
 525                 /* print frame summary.
 526                  * MAC addresses show just the last byte (for brevity),
 527                  *    but you can hack it to show more, if you'd like to. */
 528                 if (dataframe)
 529                         IWL_DEBUG_RX("%s: mhd=0x%04x, dst=0x%02x, "
 530                                      "len=%u, rssi=%d, chnl=%d, rate=%d, \n",
 531                                      title, le16_to_cpu(fc), header->addr1[5],
 532                                      length, rssi, channel, rate);
 533                 else {
 534                         /* src/dst addresses assume managed mode */
 535                         IWL_DEBUG_RX("%s: 0x%04x, dst=0x%02x, "
 536                                      "src=0x%02x, rssi=%u, tim=%lu usec, "
 537                                      "phy=0x%02x, chnl=%d\n",
 538                                      title, le16_to_cpu(fc), header->addr1[5],
 539                                      header->addr3[5], rssi,
 540                                      tsf_low - priv->scan_start_tsf,
 541                                      phy_flags, channel);
 542                 }
 543         }
 544         if (print_dump)
 545                 iwl_print_hex_dump(priv, IWL_DL_RX, data, length);
 546 }
 547 #else
 548 static inline void iwl3945_dbg_report_frame(struct iwl_priv *priv,
 549                       struct iwl_rx_packet *pkt,
 550                       struct ieee80211_hdr *header, int group100)
 551 {
 552 }
 553 #endif
 554
 555 /* This is necessary only for a number of statistics, see the caller. */
 556 static int iwl3945_is_network_packet(struct iwl_priv *priv,
 557                 struct ieee80211_hdr *header)
 558 {
 559         /* Filter incoming packets to determine if they are targeted toward
 560          * this network, discarding packets coming from ourselves */
 561         switch (priv->iw_mode) {
 562         case NL80211_IFTYPE_ADHOC: /* Header: Dest. | Source    | BSSID */
 563                 /* packets to our IBSS update information */
 564                 return !compare_ether_addr(header->addr3, priv->bssid);
 565         case NL80211_IFTYPE_STATION: /* Header: Dest. | AP{BSSID} | Source */
 566                 /* packets to our IBSS update information */
 567                 return !compare_ether_addr(header->addr2, priv->bssid);
 568         default:
 569                 return 1;
 570         }
 571 }
 572
 573 static void iwl3945_pass_packet_to_mac80211(struct iwl_priv *priv,
 574                                    struct iwl_rx_mem_buffer *rxb,
 575                                    struct ieee80211_rx_status *stats)
 576 {
 577         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
 578 #ifdef CONFIG_IWL3945_LEDS
 579         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)IWL_RX_DATA(pkt);
 580 #endif
 581         struct iwl3945_rx_frame_hdr *rx_hdr = IWL_RX_HDR(pkt);
 582         struct iwl3945_rx_frame_end *rx_end = IWL_RX_END(pkt);
 583         short len = le16_to_cpu(rx_hdr->len);
 584
 585         /* We received data from the HW, so stop the watchdog */
 586         if (unlikely((len + IWL39_RX_FRAME_SIZE) > skb_tailroom(rxb->skb))) {
 587                 IWL_DEBUG_DROP("Corruption detected!\n");
 588                 return;
 589         }
 590
 591         /* We only process data packets if the interface is open */
 592         if (unlikely(!priv->is_open)) {
 593                 IWL_DEBUG_DROP_LIMIT
 594                     ("Dropping packet while interface is not open.\n");
 595                 return;
 596         }
 597
 598         skb_reserve(rxb->skb, (void *)rx_hdr->payload - (void *)pkt);
 599         /* Set the size of the skb to the size of the frame */
 600         skb_put(rxb->skb, le16_to_cpu(rx_hdr->len));
 601
 602         if (iwl3945_mod_params.sw_crypto)
 603                 iwl3945_set_decrypted_flag(priv, rxb->skb,
 604                                        le32_to_cpu(rx_end->status), stats);
 605
 606 #ifdef CONFIG_IWL3945_LEDS
 607         if (ieee80211_is_data(hdr->frame_control))
 608                 priv->rxtxpackets += len;
 609 #endif
 610         ieee80211_rx_irqsafe(priv->hw, rxb->skb, stats);
 611         rxb->skb = NULL;
 612 }
 613
 614 #define IWL_DELAY_NEXT_SCAN_AFTER_ASSOC (HZ*6)
 615
 616 static void iwl3945_rx_reply_rx(struct iwl_priv *priv,
 617                                 struct iwl_rx_mem_buffer *rxb)
 618 {
 619         struct ieee80211_hdr *header;
 620         struct ieee80211_rx_status rx_status;
 621         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
 622         struct iwl3945_rx_frame_stats *rx_stats = IWL_RX_STATS(pkt);
 623         struct iwl3945_rx_frame_hdr *rx_hdr = IWL_RX_HDR(pkt);
 624         struct iwl3945_rx_frame_end *rx_end = IWL_RX_END(pkt);
 625         int snr;
 626         u16 rx_stats_sig_avg = le16_to_cpu(rx_stats->sig_avg);
 627         u16 rx_stats_noise_diff = le16_to_cpu(rx_stats->noise_diff);
 628         u8 network_packet;
 629
 630         rx_status.flag = 0;
 631         rx_status.mactime = le64_to_cpu(rx_end->timestamp);
 632         rx_status.freq =
 633                 ieee80211_channel_to_frequency(le16_to_cpu(rx_hdr->channel));
 634         rx_status.band = (rx_hdr->phy_flags & RX_RES_PHY_FLAGS_BAND_24_MSK) ?
 635                                 IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ;
 636
 637         rx_status.rate_idx = iwl3945_hwrate_to_plcp_idx(rx_hdr->rate);
 638         if (rx_status.band == IEEE80211_BAND_5GHZ)
 639                 rx_status.rate_idx -= IWL_FIRST_OFDM_RATE;
 640
 641         rx_status.antenna = le16_to_cpu(rx_hdr->phy_flags &
 642                                         RX_RES_PHY_FLAGS_ANTENNA_MSK) >> 4;
 643
 644         /* set the preamble flag if appropriate */
 645         if (rx_hdr->phy_flags & RX_RES_PHY_FLAGS_SHORT_PREAMBLE_MSK)
 646                 rx_status.flag |= RX_FLAG_SHORTPRE;
 647
 648         if ((unlikely(rx_stats->phy_count > 20))) {
 649                 IWL_DEBUG_DROP
 650                     ("dsp size out of range [0,20]: "
 651                      "%d/n", rx_stats->phy_count);
 652                 return;
 653         }
 654
 655         if (!(rx_end->status & RX_RES_STATUS_NO_CRC32_ERROR)
 656             || !(rx_end->status & RX_RES_STATUS_NO_RXE_OVERFLOW)) {
 657                 IWL_DEBUG_RX("Bad CRC or FIFO: 0x%08X.\n", rx_end->status);
 658                 return;
 659         }
 660
 661
 662
 663         /* Convert 3945's rssi indicator to dBm */
 664         rx_status.signal = rx_stats->rssi - IWL39_RSSI_OFFSET;
 665
 666         /* Set default noise value to -127 */
 667         if (priv->last_rx_noise == 0)
 668                 priv->last_rx_noise = IWL_NOISE_MEAS_NOT_AVAILABLE;
 669
 670         /* 3945 provides noise info for OFDM frames only.
 671          * sig_avg and noise_diff are measured by the 3945's digital signal
 672          *   processor (DSP), and indicate linear levels of signal level and
 673          *   distortion/noise within the packet preamble after
 674          *   automatic gain control (AGC).  sig_avg should stay fairly
 675          *   constant if the radio's AGC is working well.
 676          * Since these values are linear (not dB or dBm), linear
 677          *   signal-to-noise ratio (SNR) is (sig_avg / noise_diff).
 678          * Convert linear SNR to dB SNR, then subtract that from rssi dBm
 679          *   to obtain noise level in dBm.
 680          * Calculate rx_status.signal (quality indicator in %) based on SNR. */
 681         if (rx_stats_noise_diff) {
 682                 snr = rx_stats_sig_avg / rx_stats_noise_diff;
 683                 rx_status.noise = rx_status.signal -
 684                                         iwl3945_calc_db_from_ratio(snr);
 685                 rx_status.qual = iwl3945_calc_sig_qual(rx_status.signal,
 686                                                          rx_status.noise);
 687
 688         /* If noise info not available, calculate signal quality indicator (%)
 689          *   using just the dBm signal level. */
 690         } else {
 691                 rx_status.noise = priv->last_rx_noise;
 692                 rx_status.qual = iwl3945_calc_sig_qual(rx_status.signal, 0);
 693         }
 694
 695
 696         IWL_DEBUG_STATS("Rssi %d noise %d qual %d sig_avg %d noise_diff %d\n",
 697                         rx_status.signal, rx_status.noise, rx_status.qual,
 698                         rx_stats_sig_avg, rx_stats_noise_diff);
 699
 700         header = (struct ieee80211_hdr *)IWL_RX_DATA(pkt);
 701
 702         network_packet = iwl3945_is_network_packet(priv, header);
 703
 704         IWL_DEBUG_STATS_LIMIT("[%c] %d RSSI:%d Signal:%u, Noise:%u, Rate:%u\n",
 705                               network_packet ? '*' : ' ',
 706                               le16_to_cpu(rx_hdr->channel),
 707                               rx_status.signal, rx_status.signal,
 708                               rx_status.noise, rx_status.rate_idx);
 709
 710 #ifdef CONFIG_IWL3945_DEBUG
 711         if (priv->debug_level & (IWL_DL_RX))
 712                 /* Set "1" to report good data frames in groups of 100 */
 713                 iwl3945_dbg_report_frame(priv, pkt, header, 1);
 714 #endif
 715
 716         if (network_packet) {
 717                 priv->last_beacon_time = le32_to_cpu(rx_end->beacon_timestamp);
 718                 priv->last_tsf = le64_to_cpu(rx_end->timestamp);
 719                 priv->last_rx_rssi = rx_status.signal;
 720                 priv->last_rx_noise = rx_status.noise;
 721         }
 722
 723         iwl3945_pass_packet_to_mac80211(priv, rxb, &rx_status);
 724 }
 725
 726 int iwl3945_hw_txq_attach_buf_to_tfd(struct iwl_priv *priv, void *ptr,
 727                                  dma_addr_t addr, u16 len)
 728 {
 729         int count;
 730         u32 pad;
 731         struct iwl3945_tfd_frame *tfd = (struct iwl3945_tfd_frame *)ptr;
 732
 733         count = TFD_CTL_COUNT_GET(le32_to_cpu(tfd->control_flags));
 734         pad = TFD_CTL_PAD_GET(le32_to_cpu(tfd->control_flags));
 735
 736         if ((count >= NUM_TFD_CHUNKS) || (count < 0)) {
 737                 IWL_ERR(priv, "Error can not send more than %d chunks\n",
 738                           NUM_TFD_CHUNKS);
 739                 return -EINVAL;
 740         }
 741
 742         tfd->pa[count].addr = cpu_to_le32(addr);
 743         tfd->pa[count].len = cpu_to_le32(len);
 744
 745         count++;
 746
 747         tfd->control_flags = cpu_to_le32(TFD_CTL_COUNT_SET(count) |
 748                                          TFD_CTL_PAD_SET(pad));
 749
 750         return 0;
 751 }
 752
 753 /**
 754  * iwl3945_hw_txq_free_tfd - Free one TFD, those at index [txq->q.read_ptr]
 755  *
 756  * Does NOT advance any indexes
 757  */
 758 int iwl3945_hw_txq_free_tfd(struct iwl_priv *priv, struct iwl3945_tx_queue *txq)
 759 {
 760         struct iwl3945_tfd_frame *bd_tmp = (struct iwl3945_tfd_frame *)&txq->bd[0];
 761         struct iwl3945_tfd_frame *bd = &bd_tmp[txq->q.read_ptr];
 762         struct pci_dev *dev = priv->pci_dev;
 763         int i;
 764         int counter;
 765
 766         /* classify bd */
 767         if (txq->q.id == IWL_CMD_QUEUE_NUM)
 768                 /* nothing to cleanup after for host commands */
 769                 return 0;
 770
 771         /* sanity check */
 772         counter = TFD_CTL_COUNT_GET(le32_to_cpu(bd->control_flags));
 773         if (counter > NUM_TFD_CHUNKS) {
 774                 IWL_ERR(priv, "Too many chunks: %i\n", counter);
 775                 /* @todo issue fatal error, it is quite serious situation */
 776                 return 0;
 777         }
 778
 779         /* unmap chunks if any */
 780
 781         for (i = 1; i < counter; i++) {
 782                 pci_unmap_single(dev, le32_to_cpu(bd->pa[i].addr),
 783                                  le32_to_cpu(bd->pa[i].len), PCI_DMA_TODEVICE);
 784                 if (txq->txb[txq->q.read_ptr].skb[0]) {
 785                         struct sk_buff *skb = txq->txb[txq->q.read_ptr].skb[0];
 786                         if (txq->txb[txq->q.read_ptr].skb[0]) {
 787                                 /* Can be called from interrupt context */
 788                                 dev_kfree_skb_any(skb);
 789                                 txq->txb[txq->q.read_ptr].skb[0] = NULL;
 790                         }
 791                 }
 792         }
 793         return 0;
 794 }
 795
 796 u8 iwl3945_hw_find_station(struct iwl_priv *priv, const u8 *addr)
 797 {
 798         int i, start = IWL_AP_ID;
 799         int ret = IWL_INVALID_STATION;
 800         unsigned long flags;
 801
 802         if ((priv->iw_mode == NL80211_IFTYPE_ADHOC) ||
 803             (priv->iw_mode == NL80211_IFTYPE_AP))
 804                 start = IWL_STA_ID;
 805
 806         if (is_broadcast_ether_addr(addr))
 807                 return priv->hw_params.bcast_sta_id;
 808
 809         spin_lock_irqsave(&priv->sta_lock, flags);
 810         for (i = start; i < priv->hw_params.max_stations; i++)
 811                 if ((priv->stations_39[i].used) &&
 812                     (!compare_ether_addr
 813                      (priv->stations_39[i].sta.sta.addr, addr))) {
 814                         ret = i;
 815                         goto out;
 816                 }
 817
 818         IWL_DEBUG_INFO("can not find STA %pM (total %d)\n",
 819                        addr, priv->num_stations);
 820  out:
 821         spin_unlock_irqrestore(&priv->sta_lock, flags);
 822         return ret;
 823 }
 824
 825 /**
 826  * iwl3945_hw_build_tx_cmd_rate - Add rate portion to TX_CMD:
 827  *
 828 */
 829 void iwl3945_hw_build_tx_cmd_rate(struct iwl_priv *priv, struct iwl_cmd *cmd,
 830                               struct ieee80211_tx_info *info,
 831                               struct ieee80211_hdr *hdr, int sta_id, int tx_id)
 832 {
 833         u16 hw_value = ieee80211_get_tx_rate(priv->hw, info)->hw_value;
 834         u16 rate_index = min(hw_value & 0xffff, IWL_RATE_COUNT - 1);
 835         u16 rate_mask;
 836         int rate;
 837         u8 rts_retry_limit;
 838         u8 data_retry_limit;
 839         __le32 tx_flags;
 840         __le16 fc = hdr->frame_control;
 841         struct iwl3945_tx_cmd *tx = (struct iwl3945_tx_cmd *)cmd->cmd.payload;
 842
 843         rate = iwl3945_rates[rate_index].plcp;
 844         tx_flags = tx->tx_flags;
 845
 846         /* We need to figure out how to get the sta->supp_rates while
 847          * in this running context */
 848         rate_mask = IWL_RATES_MASK;
 849
 850         if (tx_id >= IWL_CMD_QUEUE_NUM)
 851                 rts_retry_limit = 3;
 852         else
 853                 rts_retry_limit = 7;
 854
 855         if (ieee80211_is_probe_resp(fc)) {
 856                 data_retry_limit = 3;
 857                 if (data_retry_limit < rts_retry_limit)
 858                         rts_retry_limit = data_retry_limit;
 859         } else
 860                 data_retry_limit = IWL_DEFAULT_TX_RETRY;
 861
 862         if (priv->data_retry_limit != -1)
 863                 data_retry_limit = priv->data_retry_limit;
 864
 865         if (ieee80211_is_mgmt(fc)) {
 866                 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
 867                 case cpu_to_le16(IEEE80211_STYPE_AUTH):
 868                 case cpu_to_le16(IEEE80211_STYPE_DEAUTH):
 869                 case cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ):
 870                 case cpu_to_le16(IEEE80211_STYPE_REASSOC_REQ):
 871                         if (tx_flags & TX_CMD_FLG_RTS_MSK) {
 872                                 tx_flags &= ~TX_CMD_FLG_RTS_MSK;
 873                                 tx_flags |= TX_CMD_FLG_CTS_MSK;
 874                         }
 875                         break;
 876                 default:
 877                         break;
 878                 }
 879         }
 880
 881         tx->rts_retry_limit = rts_retry_limit;
 882         tx->data_retry_limit = data_retry_limit;
 883         tx->rate = rate;
 884         tx->tx_flags = tx_flags;
 885
 886         /* OFDM */
 887         tx->supp_rates[0] =
 888            ((rate_mask & IWL_OFDM_RATES_MASK) >> IWL_FIRST_OFDM_RATE) & 0xFF;
 889
 890         /* CCK */
 891         tx->supp_rates[1] = (rate_mask & 0xF);
 892
 893         IWL_DEBUG_RATE("Tx sta id: %d, rate: %d (plcp), flags: 0x%4X "
 894                        "cck/ofdm mask: 0x%x/0x%x\n", sta_id,
 895                        tx->rate, le32_to_cpu(tx->tx_flags),
 896                        tx->supp_rates[1], tx->supp_rates[0]);
 897 }
 898
 899 u8 iwl3945_sync_sta(struct iwl_priv *priv, int sta_id, u16 tx_rate, u8 flags)
 900 {
 901         unsigned long flags_spin;
 902         struct iwl3945_station_entry *station;
 903
 904         if (sta_id == IWL_INVALID_STATION)
 905                 return IWL_INVALID_STATION;
 906
 907         spin_lock_irqsave(&priv->sta_lock, flags_spin);
 908         station = &priv->stations_39[sta_id];
 909
 910         station->sta.sta.modify_mask = STA_MODIFY_TX_RATE_MSK;
 911         station->sta.rate_n_flags = cpu_to_le16(tx_rate);
 912         station->sta.mode = STA_CONTROL_MODIFY_MSK;
 913
 914         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 915
 916         iwl3945_send_add_station(priv, &station->sta, flags);
 917         IWL_DEBUG_RATE("SCALE sync station %d to rate %d\n",
 918                         sta_id, tx_rate);
 919         return sta_id;
 920 }
 921
 922 static int iwl3945_nic_set_pwr_src(struct iwl_priv *priv, int pwr_max)
 923 {
 924         int rc;
 925         unsigned long flags;
 926
 927         spin_lock_irqsave(&priv->lock, flags);
 928         rc = iwl_grab_nic_access(priv);
 929         if (rc) {
 930                 spin_unlock_irqrestore(&priv->lock, flags);
 931                 return rc;
 932         }
 933
 934         if (!pwr_max) {
 935                 u32 val;
 936
 937                 rc = pci_read_config_dword(priv->pci_dev,
 938                                 PCI_POWER_SOURCE, &val);
 939                 if (val & PCI_CFG_PMC_PME_FROM_D3COLD_SUPPORT) {
 940                         iwl_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
 941                                         APMG_PS_CTRL_VAL_PWR_SRC_VAUX,
 942                                         ~APMG_PS_CTRL_MSK_PWR_SRC);
 943                         iwl_release_nic_access(priv);
 944
 945                         iwl_poll_bit(priv, CSR_GPIO_IN,
 946                                      CSR_GPIO_IN_VAL_VAUX_PWR_SRC,
 947                                      CSR_GPIO_IN_BIT_AUX_POWER, 5000);
 948                 } else
 949                         iwl_release_nic_access(priv);
 950         } else {
 951                 iwl_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
 952                                 APMG_PS_CTRL_VAL_PWR_SRC_VMAIN,
 953                                 ~APMG_PS_CTRL_MSK_PWR_SRC);
 954
 955                 iwl_release_nic_access(priv);
 956                 iwl_poll_bit(priv, CSR_GPIO_IN, CSR_GPIO_IN_VAL_VMAIN_PWR_SRC,
 957                              CSR_GPIO_IN_BIT_AUX_POWER, 5000);  /* uS */
 958         }
 959         spin_unlock_irqrestore(&priv->lock, flags);
 960
 961         return rc;
 962 }
 963
 964 static int iwl3945_rx_init(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
 965 {
 966         int rc;
 967         unsigned long flags;
 968
 969         spin_lock_irqsave(&priv->lock, flags);
 970         rc = iwl_grab_nic_access(priv);
 971         if (rc) {
 972                 spin_unlock_irqrestore(&priv->lock, flags);
 973                 return rc;
 974         }
 975
 976         iwl_write_direct32(priv, FH39_RCSR_RBD_BASE(0), rxq->dma_addr);
 977         iwl_write_direct32(priv, FH39_RCSR_RPTR_ADDR(0),
 978                              priv->shared_phys +
 979                              offsetof(struct iwl3945_shared, rx_read_ptr[0]));
 980         iwl_write_direct32(priv, FH39_RCSR_WPTR(0), 0);
 981         iwl_write_direct32(priv, FH39_RCSR_CONFIG(0),
 982                 FH39_RCSR_RX_CONFIG_REG_VAL_DMA_CHNL_EN_ENABLE |
 983                 FH39_RCSR_RX_CONFIG_REG_VAL_RDRBD_EN_ENABLE |
 984                 FH39_RCSR_RX_CONFIG_REG_BIT_WR_STTS_EN |
 985                 FH39_RCSR_RX_CONFIG_REG_VAL_MAX_FRAG_SIZE_128 |
 986                 (RX_QUEUE_SIZE_LOG << FH39_RCSR_RX_CONFIG_REG_POS_RBDC_SIZE) |
 987                 FH39_RCSR_RX_CONFIG_REG_VAL_IRQ_DEST_INT_HOST |
 988                 (1 << FH39_RCSR_RX_CONFIG_REG_POS_IRQ_RBTH) |
 989                 FH39_RCSR_RX_CONFIG_REG_VAL_MSG_MODE_FH);
 990
 991         /* fake read to flush all prev I/O */
 992         iwl_read_direct32(priv, FH39_RSSR_CTRL);
 993
 994         iwl_release_nic_access(priv);
 995         spin_unlock_irqrestore(&priv->lock, flags);
 996
 997         return 0;
 998 }
 999
1000 static int iwl3945_tx_reset(struct iwl_priv *priv)
1001 {
1002         int rc;
1003         unsigned long flags;
1004
1005         spin_lock_irqsave(&priv->lock, flags);
1006         rc = iwl_grab_nic_access(priv);
1007         if (rc) {
1008                 spin_unlock_irqrestore(&priv->lock, flags);
1009                 return rc;
1010         }
1011
1012         /* bypass mode */
1013         iwl_write_prph(priv, ALM_SCD_MODE_REG, 0x2);
1014
1015         /* RA 0 is active */
1016         iwl_write_prph(priv, ALM_SCD_ARASTAT_REG, 0x01);
1017
1018         /* all 6 fifo are active */
1019         iwl_write_prph(priv, ALM_SCD_TXFACT_REG, 0x3f);
1020
1021         iwl_write_prph(priv, ALM_SCD_SBYP_MODE_1_REG, 0x010000);
1022         iwl_write_prph(priv, ALM_SCD_SBYP_MODE_2_REG, 0x030002);
1023         iwl_write_prph(priv, ALM_SCD_TXF4MF_REG, 0x000004);
1024         iwl_write_prph(priv, ALM_SCD_TXF5MF_REG, 0x000005);
1025
1026         iwl_write_direct32(priv, FH39_TSSR_CBB_BASE,
1027                              priv->shared_phys);
1028
1029         iwl_write_direct32(priv, FH39_TSSR_MSG_CONFIG,
1030                 FH39_TSSR_TX_MSG_CONFIG_REG_VAL_SNOOP_RD_TXPD_ON |
1031                 FH39_TSSR_TX_MSG_CONFIG_REG_VAL_ORDER_RD_TXPD_ON |
1032                 FH39_TSSR_TX_MSG_CONFIG_REG_VAL_MAX_FRAG_SIZE_128B |
1033                 FH39_TSSR_TX_MSG_CONFIG_REG_VAL_SNOOP_RD_TFD_ON |
1034                 FH39_TSSR_TX_MSG_CONFIG_REG_VAL_ORDER_RD_CBB_ON |
1035                 FH39_TSSR_TX_MSG_CONFIG_REG_VAL_ORDER_RSP_WAIT_TH |
1036                 FH39_TSSR_TX_MSG_CONFIG_REG_VAL_RSP_WAIT_TH);
1037
1038         iwl_release_nic_access(priv);
1039         spin_unlock_irqrestore(&priv->lock, flags);
1040
1041         return 0;
1042 }
1043
1044 /**
1045  * iwl3945_txq_ctx_reset - Reset TX queue context
1046  *
1047  * Destroys all DMA structures and initialize them again
1048  */
1049 static int iwl3945_txq_ctx_reset(struct iwl_priv *priv)
1050 {
1051         int rc;
1052         int txq_id, slots_num;
1053
1054         iwl3945_hw_txq_ctx_free(priv);
1055
1056         /* Tx CMD queue */
1057         rc = iwl3945_tx_reset(priv);
1058         if (rc)
1059                 goto error;
1060
1061         /* Tx queue(s) */
1062         for (txq_id = 0; txq_id < TFD_QUEUE_MAX; txq_id++) {
1063                 slots_num = (txq_id == IWL_CMD_QUEUE_NUM) ?
1064                                 TFD_CMD_SLOTS : TFD_TX_CMD_SLOTS;
1065                 rc = iwl3945_tx_queue_init(priv, &priv->txq39[txq_id], slots_num,
1066                                 txq_id);
1067                 if (rc) {
1068                         IWL_ERR(priv, "Tx %d queue init failed\n", txq_id);
1069                         goto error;
1070                 }
1071         }
1072
1073         return rc;
1074
1075  error:
1076         iwl3945_hw_txq_ctx_free(priv);
1077         return rc;
1078 }
1079
1080 int iwl3945_hw_nic_init(struct iwl_priv *priv)
1081 {
1082         u8 rev_id;
1083         int rc;
1084         unsigned long flags;
1085         struct iwl_rx_queue *rxq = &priv->rxq;
1086
1087         iwl3945_power_init_handle(priv);
1088
1089         spin_lock_irqsave(&priv->lock, flags);
1090         iwl_set_bit(priv, CSR_ANA_PLL_CFG, CSR39_ANA_PLL_CFG_VAL);
1091         iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
1092                     CSR_GIO_CHICKEN_BITS_REG_BIT_L1A_NO_L0S_RX);
1093
1094         iwl_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
1095         rc = iwl_poll_direct_bit(priv, CSR_GP_CNTRL,
1096                         CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
1097         if (rc < 0) {
1098                 spin_unlock_irqrestore(&priv->lock, flags);
1099                 IWL_DEBUG_INFO("Failed to init the card\n");
1100                 return rc;
1101         }
1102
1103         rc = iwl_grab_nic_access(priv);
1104         if (rc) {
1105                 spin_unlock_irqrestore(&priv->lock, flags);
1106                 return rc;
1107         }
1108         iwl_write_prph(priv, APMG_CLK_EN_REG,
1109                                  APMG_CLK_VAL_DMA_CLK_RQT |
1110                                  APMG_CLK_VAL_BSM_CLK_RQT);
1111         udelay(20);
1112         iwl_set_bits_prph(priv, APMG_PCIDEV_STT_REG,
1113                                     APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
1114         iwl_release_nic_access(priv);
1115         spin_unlock_irqrestore(&priv->lock, flags);
1116
1117         /* Determine HW type */
1118         rc = pci_read_config_byte(priv->pci_dev, PCI_REVISION_ID, &rev_id);
1119         if (rc)
1120                 return rc;
1121         IWL_DEBUG_INFO("HW Revision ID = 0x%X\n", rev_id);
1122
1123         iwl3945_nic_set_pwr_src(priv, 1);
1124         spin_lock_irqsave(&priv->lock, flags);
1125
1126         if (rev_id & PCI_CFG_REV_ID_BIT_RTP)
1127                 IWL_DEBUG_INFO("RTP type \n");
1128         else if (rev_id & PCI_CFG_REV_ID_BIT_BASIC_SKU) {
1129                 IWL_DEBUG_INFO("3945 RADIO-MB type\n");
1130                 iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
1131                             CSR39_HW_IF_CONFIG_REG_BIT_3945_MB);
1132         } else {
1133                 IWL_DEBUG_INFO("3945 RADIO-MM type\n");
1134                 iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
1135                             CSR39_HW_IF_CONFIG_REG_BIT_3945_MM);
1136         }
1137
1138         if (EEPROM_SKU_CAP_OP_MODE_MRC == priv->eeprom39.sku_cap) {
1139                 IWL_DEBUG_INFO("SKU OP mode is mrc\n");
1140                 iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
1141                             CSR39_HW_IF_CONFIG_REG_BIT_SKU_MRC);
1142         } else
1143                 IWL_DEBUG_INFO("SKU OP mode is basic\n");
1144
1145         if ((priv->eeprom39.board_revision & 0xF0) == 0xD0) {
1146                 IWL_DEBUG_INFO("3945ABG revision is 0x%X\n",
1147                                priv->eeprom39.board_revision);
1148                 iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
1149                             CSR39_HW_IF_CONFIG_REG_BIT_BOARD_TYPE);
1150         } else {
1151                 IWL_DEBUG_INFO("3945ABG revision is 0x%X\n",
1152                                priv->eeprom39.board_revision);
1153                 iwl_clear_bit(priv, CSR_HW_IF_CONFIG_REG,
1154                               CSR39_HW_IF_CONFIG_REG_BIT_BOARD_TYPE);
1155         }
1156
1157         if (priv->eeprom39.almgor_m_version <= 1) {
1158                 iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
1159                             CSR39_HW_IF_CONFIG_REG_BITS_SILICON_TYPE_A);
1160                 IWL_DEBUG_INFO("Card M type A version is 0x%X\n",
1161                                priv->eeprom39.almgor_m_version);
1162         } else {
1163                 IWL_DEBUG_INFO("Card M type B version is 0x%X\n",
1164                                priv->eeprom39.almgor_m_version);
1165                 iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
1166                             CSR39_HW_IF_CONFIG_REG_BITS_SILICON_TYPE_B);
1167         }
1168         spin_unlock_irqrestore(&priv->lock, flags);
1169
1170         if (priv->eeprom39.sku_cap & EEPROM_SKU_CAP_SW_RF_KILL_ENABLE)
1171                 IWL_DEBUG_RF_KILL("SW RF KILL supported in EEPROM.\n");
1172
1173         if (priv->eeprom39.sku_cap & EEPROM_SKU_CAP_HW_RF_KILL_ENABLE)
1174                 IWL_DEBUG_RF_KILL("HW RF KILL supported in EEPROM.\n");
1175
1176         /* Allocate the RX queue, or reset if it is already allocated */
1177         if (!rxq->bd) {
1178                 rc = iwl3945_rx_queue_alloc(priv);
1179                 if (rc) {
1180                         IWL_ERR(priv, "Unable to initialize Rx queue\n");
1181                         return -ENOMEM;
1182                 }
1183         } else
1184                 iwl3945_rx_queue_reset(priv, rxq);
1185
1186         iwl3945_rx_replenish(priv);
1187
1188         iwl3945_rx_init(priv, rxq);
1189
1190         spin_lock_irqsave(&priv->lock, flags);
1191
1192         /* Look at using this instead:
1193         rxq->need_update = 1;
1194         iwl3945_rx_queue_update_write_ptr(priv, rxq);
1195         */
1196
1197         rc = iwl_grab_nic_access(priv);
1198         if (rc) {
1199                 spin_unlock_irqrestore(&priv->lock, flags);
1200                 return rc;
1201         }
1202         iwl_write_direct32(priv, FH39_RCSR_WPTR(0), rxq->write & ~7);
1203         iwl_release_nic_access(priv);
1204
1205         spin_unlock_irqrestore(&priv->lock, flags);
1206
1207         rc = iwl3945_txq_ctx_reset(priv);
1208         if (rc)
1209                 return rc;
1210
1211         set_bit(STATUS_INIT, &priv->status);
1212
1213         return 0;
1214 }
1215
1216 /**
1217  * iwl3945_hw_txq_ctx_free - Free TXQ Context
1218  *
1219  * Destroy all TX DMA queues and structures
1220  */
1221 void iwl3945_hw_txq_ctx_free(struct iwl_priv *priv)
1222 {
1223         int txq_id;
1224
1225         /* Tx queues */
1226         for (txq_id = 0; txq_id < TFD_QUEUE_MAX; txq_id++)
1227                 iwl3945_tx_queue_free(priv, &priv->txq39[txq_id]);
1228 }
1229
1230 void iwl3945_hw_txq_ctx_stop(struct iwl_priv *priv)
1231 {
1232         int txq_id;
1233         unsigned long flags;
1234
1235         spin_lock_irqsave(&priv->lock, flags);
1236         if (iwl_grab_nic_access(priv)) {
1237                 spin_unlock_irqrestore(&priv->lock, flags);
1238                 iwl3945_hw_txq_ctx_free(priv);
1239                 return;
1240         }
1241
1242         /* stop SCD */
1243         iwl_write_prph(priv, ALM_SCD_MODE_REG, 0);
1244
1245         /* reset TFD queues */
1246         for (txq_id = 0; txq_id < TFD_QUEUE_MAX; txq_id++) {
1247                 iwl_write_direct32(priv, FH39_TCSR_CONFIG(txq_id), 0x0);
1248                 iwl_poll_direct_bit(priv, FH39_TSSR_TX_STATUS,
1249                                 FH39_TSSR_TX_STATUS_REG_MSK_CHNL_IDLE(txq_id),
1250                                 1000);
1251         }
1252
1253         iwl_release_nic_access(priv);
1254         spin_unlock_irqrestore(&priv->lock, flags);
1255
1256         iwl3945_hw_txq_ctx_free(priv);
1257 }
1258
1259 int iwl3945_hw_nic_stop_master(struct iwl_priv *priv)
1260 {
1261         int rc = 0;
1262         u32 reg_val;
1263         unsigned long flags;
1264
1265         spin_lock_irqsave(&priv->lock, flags);
1266
1267         /* set stop master bit */
1268         iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
1269
1270         reg_val = iwl_read32(priv, CSR_GP_CNTRL);
1271
1272         if (CSR_GP_CNTRL_REG_FLAG_MAC_POWER_SAVE ==
1273             (reg_val & CSR_GP_CNTRL_REG_MSK_POWER_SAVE_TYPE))
1274                 IWL_DEBUG_INFO("Card in power save, master is already "
1275                                "stopped\n");
1276         else {
1277                 rc = iwl_poll_direct_bit(priv, CSR_RESET,
1278                                   CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
1279                 if (rc < 0) {
1280                         spin_unlock_irqrestore(&priv->lock, flags);
1281                         return rc;
1282                 }
1283         }
1284
1285         spin_unlock_irqrestore(&priv->lock, flags);
1286         IWL_DEBUG_INFO("stop master\n");
1287
1288         return rc;
1289 }
1290
1291 int iwl3945_hw_nic_reset(struct iwl_priv *priv)
1292 {
1293         int rc;
1294         unsigned long flags;
1295
1296         iwl3945_hw_nic_stop_master(priv);
1297
1298         spin_lock_irqsave(&priv->lock, flags);
1299
1300         iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
1301
1302         iwl_poll_direct_bit(priv, CSR_GP_CNTRL,
1303                          CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
1304
1305         rc = iwl_grab_nic_access(priv);
1306         if (!rc) {
1307                 iwl_write_prph(priv, APMG_CLK_CTRL_REG,
1308                                          APMG_CLK_VAL_BSM_CLK_RQT);
1309
1310                 udelay(10);
1311
1312                 iwl_set_bit(priv, CSR_GP_CNTRL,
1313                             CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
1314
1315                 iwl_write_prph(priv, APMG_RTC_INT_MSK_REG, 0x0);
1316                 iwl_write_prph(priv, APMG_RTC_INT_STT_REG,
1317                                         0xFFFFFFFF);
1318
1319                 /* enable DMA */
1320                 iwl_write_prph(priv, APMG_CLK_EN_REG,
1321                                          APMG_CLK_VAL_DMA_CLK_RQT |
1322                                          APMG_CLK_VAL_BSM_CLK_RQT);
1323                 udelay(10);
1324
1325                 iwl_set_bits_prph(priv, APMG_PS_CTRL_REG,
1326                                 APMG_PS_CTRL_VAL_RESET_REQ);
1327                 udelay(5);
1328                 iwl_clear_bits_prph(priv, APMG_PS_CTRL_REG,
1329                                 APMG_PS_CTRL_VAL_RESET_REQ);
1330                 iwl_release_nic_access(priv);
1331         }
1332
1333         /* Clear the 'host command active' bit... */
1334         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
1335
1336         wake_up_interruptible(&priv->wait_command_queue);
1337         spin_unlock_irqrestore(&priv->lock, flags);
1338
1339         return rc;
1340 }
1341
1342 /**
1343  * iwl3945_hw_reg_adjust_power_by_temp
1344  * return index delta into power gain settings table
1345 */
1346 static int iwl3945_hw_reg_adjust_power_by_temp(int new_reading, int old_reading)
1347 {
1348         return (new_reading - old_reading) * (-11) / 100;
1349 }
1350
1351 /**
1352  * iwl3945_hw_reg_temp_out_of_range - Keep temperature in sane range
1353  */
1354 static inline int iwl3945_hw_reg_temp_out_of_range(int temperature)
1355 {
1356         return ((temperature < -260) || (temperature > 25)) ? 1 : 0;
1357 }
1358
1359 int iwl3945_hw_get_temperature(struct iwl_priv *priv)
1360 {
1361         return iwl_read32(priv, CSR_UCODE_DRV_GP2);
1362 }
1363
1364 /**
1365  * iwl3945_hw_reg_txpower_get_temperature
1366  * get the current temperature by reading from NIC
1367 */
1368 static int iwl3945_hw_reg_txpower_get_temperature(struct iwl_priv *priv)
1369 {
1370         int temperature;
1371
1372         temperature = iwl3945_hw_get_temperature(priv);
1373
1374         /* driver's okay range is -260 to +25.
1375          *   human readable okay range is 0 to +285 */
1376         IWL_DEBUG_INFO("Temperature: %d\n", temperature + IWL_TEMP_CONVERT);
1377
1378         /* handle insane temp reading */
1379         if (iwl3945_hw_reg_temp_out_of_range(temperature)) {
1380                 IWL_ERR(priv, "Error bad temperature value  %d\n", temperature);
1381
1382                 /* if really really hot(?),
1383                  *   substitute the 3rd band/group's temp measured at factory */
1384                 if (priv->last_temperature > 100)
1385                         temperature = priv->eeprom39.groups[2].temperature;
1386                 else /* else use most recent "sane" value from driver */
1387                         temperature = priv->last_temperature;
1388         }
1389
1390         return temperature;     /* raw, not "human readable" */
1391 }
1392
1393 /* Adjust Txpower only if temperature variance is greater than threshold.
1394  *
1395  * Both are lower than older versions' 9 degrees */
1396 #define IWL_TEMPERATURE_LIMIT_TIMER   6
1397
1398 /**
1399  * is_temp_calib_needed - determines if new calibration is needed
1400  *
1401  * records new temperature in tx_mgr->temperature.
1402  * replaces tx_mgr->last_temperature *only* if calib needed
1403  *    (assumes caller will actually do the calibration!). */
1404 static int is_temp_calib_needed(struct iwl_priv *priv)
1405 {
1406         int temp_diff;
1407
1408         priv->temperature = iwl3945_hw_reg_txpower_get_temperature(priv);
1409         temp_diff = priv->temperature - priv->last_temperature;
1410
1411         /* get absolute value */
1412         if (temp_diff < 0) {
1413                 IWL_DEBUG_POWER("Getting cooler, delta %d,\n", temp_diff);
1414                 temp_diff = -temp_diff;
1415         } else if (temp_diff == 0)
1416                 IWL_DEBUG_POWER("Same temp,\n");
1417         else
1418                 IWL_DEBUG_POWER("Getting warmer, delta %d,\n", temp_diff);
1419
1420         /* if we don't need calibration, *don't* update last_temperature */
1421         if (temp_diff < IWL_TEMPERATURE_LIMIT_TIMER) {
1422                 IWL_DEBUG_POWER("Timed thermal calib not needed\n");
1423                 return 0;
1424         }
1425
1426         IWL_DEBUG_POWER("Timed thermal calib needed\n");
1427
1428         /* assume that caller will actually do calib ...
1429          *   update the "last temperature" value */
1430         priv->last_temperature = priv->temperature;
1431         return 1;
1432 }
1433
1434 #define IWL_MAX_GAIN_ENTRIES 78
1435 #define IWL_CCK_FROM_OFDM_POWER_DIFF  -5
1436 #define IWL_CCK_FROM_OFDM_INDEX_DIFF (10)
1437
1438 /* radio and DSP power table, each step is 1/2 dB.
1439  * 1st number is for RF analog gain, 2nd number is for DSP pre-DAC gain. */
1440 static struct iwl3945_tx_power power_gain_table[2][IWL_MAX_GAIN_ENTRIES] = {
1441         {
1442          {251, 127},            /* 2.4 GHz, highest power */
1443          {251, 127},
1444          {251, 127},
1445          {251, 127},
1446          {251, 125},
1447          {251, 110},
1448          {251, 105},
1449          {251, 98},
1450          {187, 125},
1451          {187, 115},
1452          {187, 108},
1453          {187, 99},
1454          {243, 119},
1455          {243, 111},
1456          {243, 105},
1457          {243, 97},
1458          {243, 92},
1459          {211, 106},
1460          {211, 100},
1461          {179, 120},
1462          {179, 113},
1463          {179, 107},
1464          {147, 125},
1465          {147, 119},
1466          {147, 112},
1467          {147, 106},
1468          {147, 101},
1469          {147, 97},
1470          {147, 91},
1471          {115, 107},
1472          {235, 121},
1473          {235, 115},
1474          {235, 109},
1475          {203, 127},
1476          {203, 121},
1477          {203, 115},
1478          {203, 108},
1479          {203, 102},
1480          {203, 96},
1481          {203, 92},
1482          {171, 110},
1483          {171, 104},
1484          {171, 98},
1485          {139, 116},
1486          {227, 125},
1487          {227, 119},
1488          {227, 113},
1489          {227, 107},
1490          {227, 101},
1491          {227, 96},
1492          {195, 113},
1493          {195, 106},
1494          {195, 102},
1495          {195, 95},
1496          {163, 113},
1497          {163, 106},
1498          {163, 102},
1499          {163, 95},
1500          {131, 113},
1501          {131, 106},
1502          {131, 102},
1503          {131, 95},
1504          {99, 113},
1505          {99, 106},
1506          {99, 102},
1507          {99, 95},
1508          {67, 113},
1509          {67, 106},
1510          {67, 102},
1511          {67, 95},
1512          {35, 113},
1513          {35, 106},
1514          {35, 102},
1515          {35, 95},
1516          {3, 113},
1517          {3, 106},
1518          {3, 102},
1519          {3, 95} },             /* 2.4 GHz, lowest power */
1520         {
1521          {251, 127},            /* 5.x GHz, highest power */
1522          {251, 120},
1523          {251, 114},
1524          {219, 119},
1525          {219, 101},
1526          {187, 113},
1527          {187, 102},
1528          {155, 114},
1529          {155, 103},
1530          {123, 117},
1531          {123, 107},
1532          {123, 99},
1533          {123, 92},
1534          {91, 108},
1535          {59, 125},
1536          {59, 118},
1537          {59, 109},
1538          {59, 102},
1539          {59, 96},
1540          {59, 90},
1541          {27, 104},
1542          {27, 98},
1543          {27, 92},
1544          {115, 118},
1545          {115, 111},
1546          {115, 104},
1547          {83, 126},
1548          {83, 121},
1549          {83, 113},
1550          {83, 105},
1551          {83, 99},
1552          {51, 118},
1553          {51, 111},
1554          {51, 104},
1555          {51, 98},
1556          {19, 116},
1557          {19, 109},
1558          {19, 102},
1559          {19, 98},
1560          {19, 93},
1561          {171, 113},
1562          {171, 107},
1563          {171, 99},
1564          {139, 120},
1565          {139, 113},
1566          {139, 107},
1567          {139, 99},
1568          {107, 120},
1569          {107, 113},
1570          {107, 107},
1571          {107, 99},
1572          {75, 120},
1573          {75, 113},
1574          {75, 107},
1575          {75, 99},
1576          {43, 120},
1577          {43, 113},
1578          {43, 107},
1579          {43, 99},
1580          {11, 120},
1581          {11, 113},
1582          {11, 107},
1583          {11, 99},
1584          {131, 107},
1585          {131, 99},
1586          {99, 120},
1587          {99, 113},
1588          {99, 107},
1589          {99, 99},
1590          {67, 120},
1591          {67, 113},
1592          {67, 107},
1593          {67, 99},
1594          {35, 120},
1595          {35, 113},
1596          {35, 107},
1597          {35, 99},
1598          {3, 120} }             /* 5.x GHz, lowest power */
1599 };
1600
1601 static inline u8 iwl3945_hw_reg_fix_power_index(int index)
1602 {
1603         if (index < 0)
1604                 return 0;
1605         if (index >= IWL_MAX_GAIN_ENTRIES)
1606                 return IWL_MAX_GAIN_ENTRIES - 1;
1607         return (u8) index;
1608 }
1609
1610 /* Kick off thermal recalibration check every 60 seconds */
1611 #define REG_RECALIB_PERIOD (60)
1612
1613 /**
1614  * iwl3945_hw_reg_set_scan_power - Set Tx power for scan probe requests
1615  *
1616  * Set (in our channel info database) the direct scan Tx power for 1 Mbit (CCK)
1617  * or 6 Mbit (OFDM) rates.
1618  */
1619 static void iwl3945_hw_reg_set_scan_power(struct iwl_priv *priv, u32 scan_tbl_index,
1620                                s32 rate_index, const s8 *clip_pwrs,
1621                                struct iwl_channel_info *ch_info,
1622                                int band_index)
1623 {
1624         struct iwl3945_scan_power_info *scan_power_info;
1625         s8 power;
1626         u8 power_index;
1627
1628         scan_power_info = &ch_info->scan_pwr_info[scan_tbl_index];
1629
1630         /* use this channel group's 6Mbit clipping/saturation pwr,
1631          *   but cap at regulatory scan power restriction (set during init
1632          *   based on eeprom channel data) for this channel.  */
1633         power = min(ch_info->scan_power, clip_pwrs[IWL_RATE_6M_INDEX_TABLE]);
1634
1635         /* further limit to user's max power preference.
1636          * FIXME:  Other spectrum management power limitations do not
1637          *   seem to apply?? */
1638         power = min(power, priv->user_txpower_limit);
1639         scan_power_info->requested_power = power;
1640
1641         /* find difference between new scan *power* and current "normal"
1642          *   Tx *power* for 6Mb.  Use this difference (x2) to adjust the
1643          *   current "normal" temperature-compensated Tx power *index* for
1644          *   this rate (1Mb or 6Mb) to yield new temp-compensated scan power
1645          *   *index*. */
1646         power_index = ch_info->power_info[rate_index].power_table_index
1647             - (power - ch_info->power_info
1648                [IWL_RATE_6M_INDEX_TABLE].requested_power) * 2;
1649
1650         /* store reference index that we use when adjusting *all* scan
1651          *   powers.  So we can accommodate user (all channel) or spectrum
1652          *   management (single channel) power changes "between" temperature
1653          *   feedback compensation procedures.
1654          * don't force fit this reference index into gain table; it may be a
1655          *   negative number.  This will help avoid errors when we're at
1656          *   the lower bounds (highest gains, for warmest temperatures)
1657          *   of the table. */
1658
1659         /* don't exceed table bounds for "real" setting */
1660         power_index = iwl3945_hw_reg_fix_power_index(power_index);
1661
1662         scan_power_info->power_table_index = power_index;
1663         scan_power_info->tpc.tx_gain =
1664             power_gain_table[band_index][power_index].tx_gain;
1665         scan_power_info->tpc.dsp_atten =
1666             power_gain_table[band_index][power_index].dsp_atten;
1667 }
1668
1669 /**
1670  * iwl3945_hw_reg_send_txpower - fill in Tx Power command with gain settings
1671  *
1672  * Configures power settings for all rates for the current channel,
1673  * using values from channel info struct, and send to NIC
1674  */
1675 int iwl3945_hw_reg_send_txpower(struct iwl_priv *priv)
1676 {
1677         int rate_idx, i;
1678         const struct iwl_channel_info *ch_info = NULL;
1679         struct iwl3945_txpowertable_cmd txpower = {
1680                 .channel = priv->active39_rxon.channel,
1681         };
1682
1683         txpower.band = (priv->band == IEEE80211_BAND_5GHZ) ? 0 : 1;
1684         ch_info = iwl3945_get_channel_info(priv,
1685                                        priv->band,
1686                                        le16_to_cpu(priv->active39_rxon.channel));
1687         if (!ch_info) {
1688                 IWL_ERR(priv,
1689                         "Failed to get channel info for channel %d [%d]\n",
1690                         le16_to_cpu(priv->active39_rxon.channel), priv->band);
1691                 return -EINVAL;
1692         }
1693
1694         if (!is_channel_valid(ch_info)) {
1695                 IWL_DEBUG_POWER("Not calling TX_PWR_TABLE_CMD on "
1696                                 "non-Tx channel.\n");
1697                 return 0;
1698         }
1699
1700         /* fill cmd with power settings for all rates for current channel */
1701         /* Fill OFDM rate */
1702         for (rate_idx = IWL_FIRST_OFDM_RATE, i = 0;
1703              rate_idx <= IWL39_LAST_OFDM_RATE; rate_idx++, i++) {
1704
1705                 txpower.power[i].tpc = ch_info->power_info[i].tpc;
1706                 txpower.power[i].rate = iwl3945_rates[rate_idx].plcp;
1707
1708                 IWL_DEBUG_POWER("ch %d:%d rf %d dsp %3d rate code 0x%02x\n",
1709                                 le16_to_cpu(txpower.channel),
1710                                 txpower.band,
1711                                 txpower.power[i].tpc.tx_gain,
1712                                 txpower.power[i].tpc.dsp_atten,
1713                                 txpower.power[i].rate);
1714         }
1715         /* Fill CCK rates */
1716         for (rate_idx = IWL_FIRST_CCK_RATE;
1717              rate_idx <= IWL_LAST_CCK_RATE; rate_idx++, i++) {
1718                 txpower.power[i].tpc = ch_info->power_info[i].tpc;
1719                 txpower.power[i].rate = iwl3945_rates[rate_idx].plcp;
1720
1721                 IWL_DEBUG_POWER("ch %d:%d rf %d dsp %3d rate code 0x%02x\n",
1722                                 le16_to_cpu(txpower.channel),
1723                                 txpower.band,
1724                                 txpower.power[i].tpc.tx_gain,
1725                                 txpower.power[i].tpc.dsp_atten,
1726                                 txpower.power[i].rate);
1727         }
1728
1729         return iwl3945_send_cmd_pdu(priv, REPLY_TX_PWR_TABLE_CMD,
1730                         sizeof(struct iwl3945_txpowertable_cmd), &txpower);
1731
1732 }
1733
1734 /**
1735  * iwl3945_hw_reg_set_new_power - Configures power tables at new levels
1736  * @ch_info: Channel to update.  Uses power_info.requested_power.
1737  *
1738  * Replace requested_power and base_power_index ch_info fields for
1739  * one channel.
1740  *
1741  * Called if user or spectrum management changes power preferences.
1742  * Takes into account h/w and modulation limitations (clip power).
1743  *
1744  * This does *not* send anything to NIC, just sets up ch_info for one channel.
1745  *
1746  * NOTE: reg_compensate_for_temperature_dif() *must* be run after this to
1747  *       properly fill out the scan powers, and actual h/w gain settings,
1748  *       and send changes to NIC
1749  */
1750 static int iwl3945_hw_reg_set_new_power(struct iwl_priv *priv,
1751                              struct iwl_channel_info *ch_info)
1752 {
1753         struct iwl3945_channel_power_info *power_info;
1754         int power_changed = 0;
1755         int i;
1756         const s8 *clip_pwrs;
1757         int power;
1758
1759         /* Get this chnlgrp's rate-to-max/clip-powers table */
1760         clip_pwrs = priv->clip39_groups[ch_info->group_index].clip_powers;
1761
1762         /* Get this channel's rate-to-current-power settings table */
1763         power_info = ch_info->power_info;
1764
1765         /* update OFDM Txpower settings */
1766         for (i = IWL_RATE_6M_INDEX_TABLE; i <= IWL_RATE_54M_INDEX_TABLE;
1767              i++, ++power_info) {
1768                 int delta_idx;
1769
1770                 /* limit new power to be no more than h/w capability */
1771                 power = min(ch_info->curr_txpow, clip_pwrs[i]);
1772                 if (power == power_info->requested_power)
1773                         continue;
1774
1775                 /* find difference between old and new requested powers,
1776                  *    update base (non-temp-compensated) power index */
1777                 delta_idx = (power - power_info->requested_power) * 2;
1778                 power_info->base_power_index -= delta_idx;
1779
1780                 /* save new requested power value */
1781                 power_info->requested_power = power;
1782
1783                 power_changed = 1;
1784         }
1785
1786         /* update CCK Txpower settings, based on OFDM 12M setting ...
1787          *    ... all CCK power settings for a given channel are the *same*. */
1788         if (power_changed) {
1789                 power =
1790                     ch_info->power_info[IWL_RATE_12M_INDEX_TABLE].
1791                     requested_power + IWL_CCK_FROM_OFDM_POWER_DIFF;
1792
1793                 /* do all CCK rates' iwl3945_channel_power_info structures */
1794                 for (i = IWL_RATE_1M_INDEX_TABLE; i <= IWL_RATE_11M_INDEX_TABLE; i++) {
1795                         power_info->requested_power = power;
1796                         power_info->base_power_index =
1797                             ch_info->power_info[IWL_RATE_12M_INDEX_TABLE].
1798                             base_power_index + IWL_CCK_FROM_OFDM_INDEX_DIFF;
1799                         ++power_info;
1800                 }
1801         }
1802
1803         return 0;
1804 }
1805
1806 /**
1807  * iwl3945_hw_reg_get_ch_txpower_limit - returns new power limit for channel
1808  *
1809  * NOTE: Returned power limit may be less (but not more) than requested,
1810  *       based strictly on regulatory (eeprom and spectrum mgt) limitations
1811  *       (no consideration for h/w clipping limitations).
1812  */
1813 static int iwl3945_hw_reg_get_ch_txpower_limit(struct iwl_channel_info *ch_info)
1814 {
1815         s8 max_power;
1816
1817 #if 0
1818         /* if we're using TGd limits, use lower of TGd or EEPROM */
1819         if (ch_info->tgd_data.max_power != 0)
1820                 max_power = min(ch_info->tgd_data.max_power,
1821                                 ch_info->eeprom.max_power_avg);
1822
1823         /* else just use EEPROM limits */
1824         else
1825 #endif
1826                 max_power = ch_info->eeprom.max_power_avg;
1827
1828         return min(max_power, ch_info->max_power_avg);
1829 }
1830
1831 /**
1832  * iwl3945_hw_reg_comp_txpower_temp - Compensate for temperature
1833  *
1834  * Compensate txpower settings of *all* channels for temperature.
1835  * This only accounts for the difference between current temperature
1836  *   and the factory calibration temperatures, and bases the new settings
1837  *   on the channel's base_power_index.
1838  *
1839  * If RxOn is "associated", this sends the new Txpower to NIC!
1840  */
1841 static int iwl3945_hw_reg_comp_txpower_temp(struct iwl_priv *priv)
1842 {
1843         struct iwl_channel_info *ch_info = NULL;
1844         int delta_index;
1845         const s8 *clip_pwrs; /* array of h/w max power levels for each rate */
1846         u8 a_band;
1847         u8 rate_index;
1848         u8 scan_tbl_index;
1849         u8 i;
1850         int ref_temp;
1851         int temperature = priv->temperature;
1852
1853         /* set up new Tx power info for each and every channel, 2.4 and 5.x */
1854         for (i = 0; i < priv->channel_count; i++) {
1855                 ch_info = &priv->channel_info[i];
1856                 a_band = is_channel_a_band(ch_info);
1857
1858                 /* Get this chnlgrp's factory calibration temperature */
1859                 ref_temp = (s16)priv->eeprom39.groups[ch_info->group_index].
1860                     temperature;
1861
1862                 /* get power index adjustment based on current and factory
1863                  * temps */
1864                 delta_index = iwl3945_hw_reg_adjust_power_by_temp(temperature,
1865                                                               ref_temp);
1866
1867                 /* set tx power value for all rates, OFDM and CCK */
1868                 for (rate_index = 0; rate_index < IWL_RATE_COUNT;
1869                      rate_index++) {
1870                         int power_idx =
1871                             ch_info->power_info[rate_index].base_power_index;
1872
1873                         /* temperature compensate */
1874                         power_idx += delta_index;
1875
1876                         /* stay within table range */
1877                         power_idx = iwl3945_hw_reg_fix_power_index(power_idx);
1878                         ch_info->power_info[rate_index].
1879                             power_table_index = (u8) power_idx;
1880                         ch_info->power_info[rate_index].tpc =
1881                             power_gain_table[a_band][power_idx];
1882                 }
1883
1884                 /* Get this chnlgrp's rate-to-max/clip-powers table */
1885                 clip_pwrs = priv->clip39_groups[ch_info->group_index].clip_powers;
1886
1887                 /* set scan tx power, 1Mbit for CCK, 6Mbit for OFDM */
1888                 for (scan_tbl_index = 0;
1889                      scan_tbl_index < IWL_NUM_SCAN_RATES; scan_tbl_index++) {
1890                         s32 actual_index = (scan_tbl_index == 0) ?
1891                             IWL_RATE_1M_INDEX_TABLE : IWL_RATE_6M_INDEX_TABLE;
1892                         iwl3945_hw_reg_set_scan_power(priv, scan_tbl_index,
1893                                            actual_index, clip_pwrs,
1894                                            ch_info, a_band);
1895                 }
1896         }
1897
1898         /* send Txpower command for current channel to ucode */
1899         return iwl3945_hw_reg_send_txpower(priv);
1900 }
1901
1902 int iwl3945_hw_reg_set_txpower(struct iwl_priv *priv, s8 power)
1903 {
1904         struct iwl_channel_info *ch_info;
1905         s8 max_power;
1906         u8 a_band;
1907         u8 i;
1908
1909         if (priv->user_txpower_limit == power) {
1910                 IWL_DEBUG_POWER("Requested Tx power same as current "
1911                                 "limit: %ddBm.\n", power);
1912                 return 0;
1913         }
1914
1915         IWL_DEBUG_POWER("Setting upper limit clamp to %ddBm.\n", power);
1916         priv->user_txpower_limit = power;
1917
1918         /* set up new Tx powers for each and every channel, 2.4 and 5.x */
1919
1920         for (i = 0; i < priv->channel_count; i++) {
1921                 ch_info = &priv->channel_info[i];
1922                 a_band = is_channel_a_band(ch_info);
1923
1924                 /* find minimum power of all user and regulatory constraints
1925                  *    (does not consider h/w clipping limitations) */
1926                 max_power = iwl3945_hw_reg_get_ch_txpower_limit(ch_info);
1927                 max_power = min(power, max_power);
1928                 if (max_power != ch_info->curr_txpow) {
1929                         ch_info->curr_txpow = max_power;
1930
1931                         /* this considers the h/w clipping limitations */
1932                         iwl3945_hw_reg_set_new_power(priv, ch_info);
1933                 }
1934         }
1935
1936         /* update txpower settings for all channels,
1937          *   send to NIC if associated. */
1938         is_temp_calib_needed(priv);
1939         iwl3945_hw_reg_comp_txpower_temp(priv);
1940
1941         return 0;
1942 }
1943
1944 /* will add 3945 channel switch cmd handling later */
1945 int iwl3945_hw_channel_switch(struct iwl_priv *priv, u16 channel)
1946 {
1947         return 0;
1948 }
1949
1950 /**
1951  * iwl3945_reg_txpower_periodic -  called when time to check our temperature.
1952  *
1953  * -- reset periodic timer
1954  * -- see if temp has changed enough to warrant re-calibration ... if so:
1955  *     -- correct coeffs for temp (can reset temp timer)
1956  *     -- save this temp as "last",
1957  *     -- send new set of gain settings to NIC
1958  * NOTE:  This should continue working, even when we're not associated,
1959  *   so we can keep our internal table of scan powers current. */
1960 void iwl3945_reg_txpower_periodic(struct iwl_priv *priv)
1961 {
1962         /* This will kick in the "brute force"
1963          * iwl3945_hw_reg_comp_txpower_temp() below */
1964         if (!is_temp_calib_needed(priv))
1965                 goto reschedule;
1966
1967         /* Set up a new set of temp-adjusted TxPowers, send to NIC.
1968          * This is based *only* on current temperature,
1969          * ignoring any previous power measurements */
1970         iwl3945_hw_reg_comp_txpower_temp(priv);
1971
1972  reschedule:
1973         queue_delayed_work(priv->workqueue,
1974                            &priv->thermal_periodic, REG_RECALIB_PERIOD * HZ);
1975 }
1976
1977 static void iwl3945_bg_reg_txpower_periodic(struct work_struct *work)
1978 {
1979         struct iwl_priv *priv = container_of(work, struct iwl_priv,
1980                                              thermal_periodic.work);
1981
1982         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1983                 return;
1984
1985         mutex_lock(&priv->mutex);
1986         iwl3945_reg_txpower_periodic(priv);
1987         mutex_unlock(&priv->mutex);
1988 }
1989
1990 /**
1991  * iwl3945_hw_reg_get_ch_grp_index - find the channel-group index (0-4)
1992  *                                 for the channel.
1993  *
1994  * This function is used when initializing channel-info structs.
1995  *
1996  * NOTE: These channel groups do *NOT* match the bands above!
1997  *       These channel groups are based on factory-tested channels;
1998  *       on A-band, EEPROM's "group frequency" entries represent the top
1999  *       channel in each group 1-4.  Group 5 All B/G channels are in group 0.
2000  */
2001 static u16 iwl3945_hw_reg_get_ch_grp_index(struct iwl_priv *priv,
2002                                        const struct iwl_channel_info *ch_info)
2003 {
2004         struct iwl3945_eeprom_txpower_group *ch_grp = &priv->eeprom39.groups[0];
2005         u8 group;
2006         u16 group_index = 0;    /* based on factory calib frequencies */
2007         u8 grp_channel;
2008
2009         /* Find the group index for the channel ... don't use index 1(?) */
2010         if (is_channel_a_band(ch_info)) {
2011                 for (group = 1; group < 5; group++) {
2012                         grp_channel = ch_grp[group].group_channel;
2013                         if (ch_info->channel <= grp_channel) {
2014                                 group_index = group;
2015                                 break;
2016                         }
2017                 }
2018                 /* group 4 has a few channels *above* its factory cal freq */
2019                 if (group == 5)
2020                         group_index = 4;
2021         } else
2022                 group_index = 0;        /* 2.4 GHz, group 0 */
2023
2024         IWL_DEBUG_POWER("Chnl %d mapped to grp %d\n", ch_info->channel,
2025                         group_index);
2026         return group_index;
2027 }
2028
2029 /**
2030  * iwl3945_hw_reg_get_matched_power_index - Interpolate to get nominal index
2031  *
2032  * Interpolate to get nominal (i.e. at factory calibration temperature) index
2033  *   into radio/DSP gain settings table for requested power.
2034  */
2035 static int iwl3945_hw_reg_get_matched_power_index(struct iwl_priv *priv,
2036                                        s8 requested_power,
2037                                        s32 setting_index, s32 *new_index)
2038 {
2039         const struct iwl3945_eeprom_txpower_group *chnl_grp = NULL;
2040         s32 index0, index1;
2041         s32 power = 2 * requested_power;
2042         s32 i;
2043         const struct iwl3945_eeprom_txpower_sample *samples;
2044         s32 gains0, gains1;
2045         s32 res;
2046         s32 denominator;
2047
2048         chnl_grp = &priv->eeprom39.groups[setting_index];
2049         samples = chnl_grp->samples;
2050         for (i = 0; i < 5; i++) {
2051                 if (power == samples[i].power) {
2052                         *new_index = samples[i].gain_index;
2053                         return 0;
2054                 }
2055         }
2056
2057         if (power > samples[1].power) {
2058                 index0 = 0;
2059                 index1 = 1;
2060         } else if (power > samples[2].power) {
2061                 index0 = 1;
2062                 index1 = 2;
2063         } else if (power > samples[3].power) {
2064                 index0 = 2;
2065                 index1 = 3;
2066         } else {
2067                 index0 = 3;
2068                 index1 = 4;
2069         }
2070
2071         denominator = (s32) samples[index1].power - (s32) samples[index0].power;
2072         if (denominator == 0)
2073                 return -EINVAL;
2074         gains0 = (s32) samples[index0].gain_index * (1 << 19);
2075         gains1 = (s32) samples[index1].gain_index * (1 << 19);
2076         res = gains0 + (gains1 - gains0) *
2077             ((s32) power - (s32) samples[index0].power) / denominator +
2078             (1 << 18);
2079         *new_index = res >> 19;
2080         return 0;
2081 }
2082
2083 static void iwl3945_hw_reg_init_channel_groups(struct iwl_priv *priv)
2084 {
2085         u32 i;
2086         s32 rate_index;
2087         const struct iwl3945_eeprom_txpower_group *group;
2088
2089         IWL_DEBUG_POWER("Initializing factory calib info from EEPROM\n");
2090
2091         for (i = 0; i < IWL_NUM_TX_CALIB_GROUPS; i++) {
2092                 s8 *clip_pwrs;  /* table of power levels for each rate */
2093                 s8 satur_pwr;   /* saturation power for each chnl group */
2094                 group = &priv->eeprom39.groups[i];
2095
2096                 /* sanity check on factory saturation power value */
2097                 if (group->saturation_power < 40) {
2098                         IWL_WARN(priv, "Error: saturation power is %d, "
2099                                     "less than minimum expected 40\n",
2100                                     group->saturation_power);
2101                         return;
2102                 }
2103
2104                 /*
2105                  * Derive requested power levels for each rate, based on
2106                  *   hardware capabilities (saturation power for band).
2107                  * Basic value is 3dB down from saturation, with further
2108                  *   power reductions for highest 3 data rates.  These
2109                  *   backoffs provide headroom for high rate modulation
2110                  *   power peaks, without too much distortion (clipping).
2111                  */
2112                 /* we'll fill in this array with h/w max power levels */
2113                 clip_pwrs = (s8 *) priv->clip39_groups[i].clip_powers;
2114
2115                 /* divide factory saturation power by 2 to find -3dB level */
2116                 satur_pwr = (s8) (group->saturation_power >> 1);
2117
2118                 /* fill in channel group's nominal powers for each rate */
2119                 for (rate_index = 0;
2120                      rate_index < IWL_RATE_COUNT; rate_index++, clip_pwrs++) {
2121                         switch (rate_index) {
2122                         case IWL_RATE_36M_INDEX_TABLE:
2123                                 if (i == 0)     /* B/G */
2124                                         *clip_pwrs = satur_pwr;
2125                                 else    /* A */
2126                                         *clip_pwrs = satur_pwr - 5;
2127                                 break;
2128                         case IWL_RATE_48M_INDEX_TABLE:
2129                                 if (i == 0)
2130                                         *clip_pwrs = satur_pwr - 7;
2131                                 else
2132                                         *clip_pwrs = satur_pwr - 10;
2133                                 break;
2134                         case IWL_RATE_54M_INDEX_TABLE:
2135                                 if (i == 0)
2136                                         *clip_pwrs = satur_pwr - 9;
2137                                 else
2138                                         *clip_pwrs = satur_pwr - 12;
2139                                 break;
2140                         default:
2141                                 *clip_pwrs = satur_pwr;
2142                                 break;
2143                         }
2144                 }
2145         }
2146 }
2147
2148 /**
2149  * iwl3945_txpower_set_from_eeprom - Set channel power info based on EEPROM
2150  *
2151  * Second pass (during init) to set up priv->channel_info
2152  *
2153  * Set up Tx-power settings in our channel info database for each VALID
2154  * (for this geo/SKU) channel, at all Tx data rates, based on eeprom values
2155  * and current temperature.
2156  *
2157  * Since this is based on current temperature (at init time), these values may
2158  * not be valid for very long, but it gives us a starting/default point,
2159  * and allows us to active (i.e. using Tx) scan.
2160  *
2161  * This does *not* write values to NIC, just sets up our internal table.
2162  */
2163 int iwl3945_txpower_set_from_eeprom(struct iwl_priv *priv)
2164 {
2165         struct iwl_channel_info *ch_info = NULL;
2166         struct iwl3945_channel_power_info *pwr_info;
2167         int delta_index;
2168         u8 rate_index;
2169         u8 scan_tbl_index;
2170         const s8 *clip_pwrs;    /* array of power levels for each rate */
2171         u8 gain, dsp_atten;
2172         s8 power;
2173         u8 pwr_index, base_pwr_index, a_band;
2174         u8 i;
2175         int temperature;
2176
2177         /* save temperature reference,
2178          *   so we can determine next time to calibrate */
2179         temperature = iwl3945_hw_reg_txpower_get_temperature(priv);
2180         priv->last_temperature = temperature;
2181
2182         iwl3945_hw_reg_init_channel_groups(priv);
2183
2184         /* initialize Tx power info for each and every channel, 2.4 and 5.x */
2185         for (i = 0, ch_info = priv->channel_info; i < priv->channel_count;
2186              i++, ch_info++) {
2187                 a_band = is_channel_a_band(ch_info);
2188                 if (!is_channel_valid(ch_info))
2189                         continue;
2190
2191                 /* find this channel's channel group (*not* "band") index */
2192                 ch_info->group_index =
2193                         iwl3945_hw_reg_get_ch_grp_index(priv, ch_info);
2194
2195                 /* Get this chnlgrp's rate->max/clip-powers table */
2196                 clip_pwrs = priv->clip39_groups[ch_info->group_index].clip_powers;
2197
2198                 /* calculate power index *adjustment* value according to
2199                  *  diff between current temperature and factory temperature */
2200                 delta_index = iwl3945_hw_reg_adjust_power_by_temp(temperature,
2201                                 priv->eeprom39.groups[ch_info->group_index].
2202                                 temperature);
2203
2204                 IWL_DEBUG_POWER("Delta index for channel %d: %d [%d]\n",
2205                                 ch_info->channel, delta_index, temperature +
2206                                 IWL_TEMP_CONVERT);
2207
2208                 /* set tx power value for all OFDM rates */
2209                 for (rate_index = 0; rate_index < IWL_OFDM_RATES;
2210                      rate_index++) {
2211                         s32 uninitialized_var(power_idx);
2212                         int rc;
2213
2214                         /* use channel group's clip-power table,
2215                          *   but don't exceed channel's max power */
2216                         s8 pwr = min(ch_info->max_power_avg,
2217                                      clip_pwrs[rate_index]);
2218
2219                         pwr_info = &ch_info->power_info[rate_index];
2220
2221                         /* get base (i.e. at factory-measured temperature)
2222                          *    power table index for this rate's power */
2223                         rc = iwl3945_hw_reg_get_matched_power_index(priv, pwr,
2224                                                          ch_info->group_index,
2225                                                          &power_idx);
2226                         if (rc) {
2227                                 IWL_ERR(priv, "Invalid power index\n");
2228                                 return rc;
2229                         }
2230                         pwr_info->base_power_index = (u8) power_idx;
2231
2232                         /* temperature compensate */
2233                         power_idx += delta_index;
2234
2235                         /* stay within range of gain table */
2236                         power_idx = iwl3945_hw_reg_fix_power_index(power_idx);
2237
2238                         /* fill 1 OFDM rate's iwl3945_channel_power_info struct */
2239                         pwr_info->requested_power = pwr;
2240                         pwr_info->power_table_index = (u8) power_idx;
2241                         pwr_info->tpc.tx_gain =
2242                             power_gain_table[a_band][power_idx].tx_gain;
2243                         pwr_info->tpc.dsp_atten =
2244                             power_gain_table[a_band][power_idx].dsp_atten;
2245                 }
2246
2247                 /* set tx power for CCK rates, based on OFDM 12 Mbit settings*/
2248                 pwr_info = &ch_info->power_info[IWL_RATE_12M_INDEX_TABLE];
2249                 power = pwr_info->requested_power +
2250                         IWL_CCK_FROM_OFDM_POWER_DIFF;
2251                 pwr_index = pwr_info->power_table_index +
2252                         IWL_CCK_FROM_OFDM_INDEX_DIFF;
2253                 base_pwr_index = pwr_info->base_power_index +
2254                         IWL_CCK_FROM_OFDM_INDEX_DIFF;
2255
2256                 /* stay within table range */
2257                 pwr_index = iwl3945_hw_reg_fix_power_index(pwr_index);
2258                 gain = power_gain_table[a_band][pwr_index].tx_gain;
2259                 dsp_atten = power_gain_table[a_band][pwr_index].dsp_atten;
2260
2261                 /* fill each CCK rate's iwl3945_channel_power_info structure
2262                  * NOTE:  All CCK-rate Txpwrs are the same for a given chnl!
2263                  * NOTE:  CCK rates start at end of OFDM rates! */
2264                 for (rate_index = 0;
2265                      rate_index < IWL_CCK_RATES; rate_index++) {
2266                         pwr_info = &ch_info->power_info[rate_index+IWL_OFDM_RATES];
2267                         pwr_info->requested_power = power;
2268                         pwr_info->power_table_index = pwr_index;
2269                         pwr_info->base_power_index = base_pwr_index;
2270                         pwr_info->tpc.tx_gain = gain;
2271                         pwr_info->tpc.dsp_atten = dsp_atten;
2272                 }
2273
2274                 /* set scan tx power, 1Mbit for CCK, 6Mbit for OFDM */
2275                 for (scan_tbl_index = 0;
2276                      scan_tbl_index < IWL_NUM_SCAN_RATES; scan_tbl_index++) {
2277                         s32 actual_index = (scan_tbl_index == 0) ?
2278                                 IWL_RATE_1M_INDEX_TABLE : IWL_RATE_6M_INDEX_TABLE;
2279                         iwl3945_hw_reg_set_scan_power(priv, scan_tbl_index,
2280                                 actual_index, clip_pwrs, ch_info, a_band);
2281                 }
2282         }
2283
2284         return 0;
2285 }
2286
2287 int iwl3945_hw_rxq_stop(struct iwl_priv *priv)
2288 {
2289         int rc;
2290         unsigned long flags;
2291
2292         spin_lock_irqsave(&priv->lock, flags);
2293         rc = iwl_grab_nic_access(priv);
2294         if (rc) {
2295                 spin_unlock_irqrestore(&priv->lock, flags);
2296                 return rc;
2297         }
2298
2299         iwl_write_direct32(priv, FH39_RCSR_CONFIG(0), 0);
2300         rc = iwl_poll_direct_bit(priv, FH39_RSSR_STATUS,
2301                         FH39_RSSR_CHNL0_RX_STATUS_CHNL_IDLE, 1000);
2302         if (rc < 0)
2303                 IWL_ERR(priv, "Can't stop Rx DMA.\n");
2304
2305         iwl_release_nic_access(priv);
2306         spin_unlock_irqrestore(&priv->lock, flags);
2307
2308         return 0;
2309 }
2310
2311 int iwl3945_hw_tx_queue_init(struct iwl_priv *priv, struct iwl3945_tx_queue *txq)
2312 {
2313         int rc;
2314         unsigned long flags;
2315         int txq_id = txq->q.id;
2316
2317         struct iwl3945_shared *shared_data = priv->shared_virt;
2318
2319         shared_data->tx_base_ptr[txq_id] = cpu_to_le32((u32)txq->q.dma_addr);
2320
2321         spin_lock_irqsave(&priv->lock, flags);
2322         rc = iwl_grab_nic_access(priv);
2323         if (rc) {
2324                 spin_unlock_irqrestore(&priv->lock, flags);
2325                 return rc;
2326         }
2327         iwl_write_direct32(priv, FH39_CBCC_CTRL(txq_id), 0);
2328         iwl_write_direct32(priv, FH39_CBCC_BASE(txq_id), 0);
2329
2330         iwl_write_direct32(priv, FH39_TCSR_CONFIG(txq_id),
2331                 FH39_TCSR_TX_CONFIG_REG_VAL_CIRQ_RTC_NOINT |
2332                 FH39_TCSR_TX_CONFIG_REG_VAL_MSG_MODE_TXF |
2333                 FH39_TCSR_TX_CONFIG_REG_VAL_CIRQ_HOST_IFTFD |
2334                 FH39_TCSR_TX_CONFIG_REG_VAL_DMA_CREDIT_ENABLE_VAL |
2335                 FH39_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_ENABLE);
2336         iwl_release_nic_access(priv);
2337
2338         /* fake read to flush all prev. writes */
2339         iwl_read32(priv, FH39_TSSR_CBB_BASE);
2340         spin_unlock_irqrestore(&priv->lock, flags);
2341
2342         return 0;
2343 }
2344
2345 int iwl3945_hw_get_rx_read(struct iwl_priv *priv)
2346 {
2347         struct iwl3945_shared *shared_data = priv->shared_virt;
2348
2349         return le32_to_cpu(shared_data->rx_read_ptr[0]);
2350 }
2351
2352 /**
2353  * iwl3945_init_hw_rate_table - Initialize the hardware rate fallback table
2354  */
2355 int iwl3945_init_hw_rate_table(struct iwl_priv *priv)
2356 {
2357         int rc, i, index, prev_index;
2358         struct iwl3945_rate_scaling_cmd rate_cmd = {
2359                 .reserved = {0, 0, 0},
2360         };
2361         struct iwl3945_rate_scaling_info *table = rate_cmd.table;
2362
2363         for (i = 0; i < ARRAY_SIZE(iwl3945_rates); i++) {
2364                 index = iwl3945_rates[i].table_rs_index;
2365
2366                 table[index].rate_n_flags =
2367                         iwl3945_hw_set_rate_n_flags(iwl3945_rates[i].plcp, 0);
2368                 table[index].try_cnt = priv->retry_rate;
2369                 prev_index = iwl3945_get_prev_ieee_rate(i);
2370                 table[index].next_rate_index =
2371                                 iwl3945_rates[prev_index].table_rs_index;
2372         }
2373
2374         switch (priv->band) {
2375         case IEEE80211_BAND_5GHZ:
2376                 IWL_DEBUG_RATE("Select A mode rate scale\n");
2377                 /* If one of the following CCK rates is used,
2378                  * have it fall back to the 6M OFDM rate */
2379                 for (i = IWL_RATE_1M_INDEX_TABLE;
2380                         i <= IWL_RATE_11M_INDEX_TABLE; i++)
2381                         table[i].next_rate_index =
2382                           iwl3945_rates[IWL_FIRST_OFDM_RATE].table_rs_index;
2383
2384                 /* Don't fall back to CCK rates */
2385                 table[IWL_RATE_12M_INDEX_TABLE].next_rate_index =
2386                                                 IWL_RATE_9M_INDEX_TABLE;
2387
2388                 /* Don't drop out of OFDM rates */
2389                 table[IWL_RATE_6M_INDEX_TABLE].next_rate_index =
2390                     iwl3945_rates[IWL_FIRST_OFDM_RATE].table_rs_index;
2391                 break;
2392
2393         case IEEE80211_BAND_2GHZ:
2394                 IWL_DEBUG_RATE("Select B/G mode rate scale\n");
2395                 /* If an OFDM rate is used, have it fall back to the
2396                  * 1M CCK rates */
2397
2398                 if (!(priv->sta_supp_rates & IWL_OFDM_RATES_MASK) &&
2399                     iwl3945_is_associated(priv)) {
2400
2401                         index = IWL_FIRST_CCK_RATE;
2402                         for (i = IWL_RATE_6M_INDEX_TABLE;
2403                              i <= IWL_RATE_54M_INDEX_TABLE; i++)
2404                                 table[i].next_rate_index =
2405                                         iwl3945_rates[index].table_rs_index;
2406
2407                         index = IWL_RATE_11M_INDEX_TABLE;
2408                         /* CCK shouldn't fall back to OFDM... */
2409                         table[index].next_rate_index = IWL_RATE_5M_INDEX_TABLE;
2410                 }
2411                 break;
2412
2413         default:
2414                 WARN_ON(1);
2415                 break;
2416         }
2417
2418         /* Update the rate scaling for control frame Tx */
2419         rate_cmd.table_id = 0;
2420         rc = iwl3945_send_cmd_pdu(priv, REPLY_RATE_SCALE, sizeof(rate_cmd),
2421                               &rate_cmd);
2422         if (rc)
2423                 return rc;
2424
2425         /* Update the rate scaling for data frame Tx */
2426         rate_cmd.table_id = 1;
2427         return iwl3945_send_cmd_pdu(priv, REPLY_RATE_SCALE, sizeof(rate_cmd),
2428                                 &rate_cmd);
2429 }
2430
2431 /* Called when initializing driver */
2432 int iwl3945_hw_set_hw_params(struct iwl_priv *priv)
2433 {
2434         memset((void *)&priv->hw_params, 0,
2435                sizeof(struct iwl_hw_params));
2436
2437         priv->shared_virt =
2438             pci_alloc_consistent(priv->pci_dev,
2439                                  sizeof(struct iwl3945_shared),
2440                                  &priv->shared_phys);
2441
2442         if (!priv->shared_virt) {
2443                 IWL_ERR(priv, "failed to allocate pci memory\n");
2444                 mutex_unlock(&priv->mutex);
2445                 return -ENOMEM;
2446         }
2447
2448         priv->hw_params.rx_buf_size = IWL_RX_BUF_SIZE;
2449         priv->hw_params.max_pkt_size = 2342;
2450         priv->hw_params.max_rxq_size = RX_QUEUE_SIZE;
2451         priv->hw_params.max_rxq_log = RX_QUEUE_SIZE_LOG;
2452         priv->hw_params.max_stations = IWL3945_STATION_COUNT;
2453         priv->hw_params.bcast_sta_id = IWL3945_BROADCAST_ID;
2454
2455         priv->hw_params.tx_ant_num = 2;
2456         return 0;
2457 }
2458
2459 unsigned int iwl3945_hw_get_beacon_cmd(struct iwl_priv *priv,
2460                           struct iwl3945_frame *frame, u8 rate)
2461 {
2462         struct iwl3945_tx_beacon_cmd *tx_beacon_cmd;
2463         unsigned int frame_size;
2464
2465         tx_beacon_cmd = (struct iwl3945_tx_beacon_cmd *)&frame->u;
2466         memset(tx_beacon_cmd, 0, sizeof(*tx_beacon_cmd));
2467
2468         tx_beacon_cmd->tx.sta_id = priv->hw_params.bcast_sta_id;
2469         tx_beacon_cmd->tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2470
2471         frame_size = iwl3945_fill_beacon_frame(priv,
2472                                 tx_beacon_cmd->frame,
2473                                 sizeof(frame->u) - sizeof(*tx_beacon_cmd));
2474
2475         BUG_ON(frame_size > MAX_MPDU_SIZE);
2476         tx_beacon_cmd->tx.len = cpu_to_le16((u16)frame_size);
2477
2478         tx_beacon_cmd->tx.rate = rate;
2479         tx_beacon_cmd->tx.tx_flags = (TX_CMD_FLG_SEQ_CTL_MSK |
2480                                       TX_CMD_FLG_TSF_MSK);
2481
2482         /* supp_rates[0] == OFDM start at IWL_FIRST_OFDM_RATE*/
2483         tx_beacon_cmd->tx.supp_rates[0] =
2484                 (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
2485
2486         tx_beacon_cmd->tx.supp_rates[1] =
2487                 (IWL_CCK_BASIC_RATES_MASK & 0xF);
2488
2489         return sizeof(struct iwl3945_tx_beacon_cmd) + frame_size;
2490 }
2491
2492 void iwl3945_hw_rx_handler_setup(struct iwl_priv *priv)
2493 {
2494         priv->rx_handlers[REPLY_TX] = iwl3945_rx_reply_tx;
2495         priv->rx_handlers[REPLY_3945_RX] = iwl3945_rx_reply_rx;
2496 }
2497
2498 void iwl3945_hw_setup_deferred_work(struct iwl_priv *priv)
2499 {
2500         INIT_DELAYED_WORK(&priv->thermal_periodic,
2501                           iwl3945_bg_reg_txpower_periodic);
2502 }
2503
2504 void iwl3945_hw_cancel_deferred_work(struct iwl_priv *priv)
2505 {
2506         cancel_delayed_work(&priv->thermal_periodic);
2507 }
2508
2509 /* check contents of special bootstrap uCode SRAM */
2510 static int iwl3945_verify_bsm(struct iwl_priv *priv)
2511  {
2512         __le32 *image = priv->ucode_boot.v_addr;
2513         u32 len = priv->ucode_boot.len;
2514         u32 reg;
2515         u32 val;
2516
2517         IWL_DEBUG_INFO("Begin verify bsm\n");
2518
2519         /* verify BSM SRAM contents */
2520         val = iwl_read_prph(priv, BSM_WR_DWCOUNT_REG);
2521         for (reg = BSM_SRAM_LOWER_BOUND;
2522              reg < BSM_SRAM_LOWER_BOUND + len;
2523              reg += sizeof(u32), image++) {
2524                 val = iwl_read_prph(priv, reg);
2525                 if (val != le32_to_cpu(*image)) {
2526                         IWL_ERR(priv, "BSM uCode verification failed at "
2527                                   "addr 0x%08X+%u (of %u), is 0x%x, s/b 0x%x\n",
2528                                   BSM_SRAM_LOWER_BOUND,
2529                                   reg - BSM_SRAM_LOWER_BOUND, len,
2530                                   val, le32_to_cpu(*image));
2531                         return -EIO;
2532                 }
2533         }
2534
2535         IWL_DEBUG_INFO("BSM bootstrap uCode image OK\n");
2536
2537         return 0;
2538 }
2539
2540  /**
2541   * iwl3945_load_bsm - Load bootstrap instructions
2542   *
2543   * BSM operation:
2544   *
2545   * The Bootstrap State Machine (BSM) stores a short bootstrap uCode program
2546   * in special SRAM that does not power down during RFKILL.  When powering back
2547   * up after power-saving sleeps (or during initial uCode load), the BSM loads
2548   * the bootstrap program into the on-board processor, and starts it.
2549   *
2550   * The bootstrap program loads (via DMA) instructions and data for a new
2551   * program from host DRAM locations indicated by the host driver in the
2552   * BSM_DRAM_* registers.  Once the new program is loaded, it starts
2553   * automatically.
2554   *
2555   * When initializing the NIC, the host driver points the BSM to the
2556   * "initialize" uCode image.  This uCode sets up some internal data, then
2557   * notifies host via "initialize alive" that it is complete.
2558   *
2559   * The host then replaces the BSM_DRAM_* pointer values to point to the
2560   * normal runtime uCode instructions and a backup uCode data cache buffer
2561   * (filled initially with starting data values for the on-board processor),
2562   * then triggers the "initialize" uCode to load and launch the runtime uCode,
2563   * which begins normal operation.
2564   *
2565   * When doing a power-save shutdown, runtime uCode saves data SRAM into
2566   * the backup data cache in DRAM before SRAM is powered down.
2567   *
2568   * When powering back up, the BSM loads the bootstrap program.  This reloads
2569   * the runtime uCode instructions and the backup data cache into SRAM,
2570   * and re-launches the runtime uCode from where it left off.
2571   */
2572 static int iwl3945_load_bsm(struct iwl_priv *priv)
2573 {
2574         __le32 *image = priv->ucode_boot.v_addr;
2575         u32 len = priv->ucode_boot.len;
2576         dma_addr_t pinst;
2577         dma_addr_t pdata;
2578         u32 inst_len;
2579         u32 data_len;
2580         int rc;
2581         int i;
2582         u32 done;
2583         u32 reg_offset;
2584
2585         IWL_DEBUG_INFO("Begin load bsm\n");
2586
2587         /* make sure bootstrap program is no larger than BSM's SRAM size */
2588         if (len > IWL39_MAX_BSM_SIZE)
2589                 return -EINVAL;
2590
2591         /* Tell bootstrap uCode where to find the "Initialize" uCode
2592         *   in host DRAM ... host DRAM physical address bits 31:0 for 3945.
2593         * NOTE:  iwl3945_initialize_alive_start() will replace these values,
2594         *        after the "initialize" uCode has run, to point to
2595         *        runtime/protocol instructions and backup data cache. */
2596         pinst = priv->ucode_init.p_addr;
2597         pdata = priv->ucode_init_data.p_addr;
2598         inst_len = priv->ucode_init.len;
2599         data_len = priv->ucode_init_data.len;
2600
2601         rc = iwl_grab_nic_access(priv);
2602         if (rc)
2603                 return rc;
2604
2605         iwl_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
2606         iwl_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
2607         iwl_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG, inst_len);
2608         iwl_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG, data_len);
2609
2610         /* Fill BSM memory with bootstrap instructions */
2611         for (reg_offset = BSM_SRAM_LOWER_BOUND;
2612              reg_offset < BSM_SRAM_LOWER_BOUND + len;
2613              reg_offset += sizeof(u32), image++)
2614                 _iwl_write_prph(priv, reg_offset,
2615                                           le32_to_cpu(*image));
2616
2617         rc = iwl3945_verify_bsm(priv);
2618         if (rc) {
2619                 iwl_release_nic_access(priv);
2620                 return rc;
2621         }
2622
2623         /* Tell BSM to copy from BSM SRAM into instruction SRAM, when asked */
2624         iwl_write_prph(priv, BSM_WR_MEM_SRC_REG, 0x0);
2625         iwl_write_prph(priv, BSM_WR_MEM_DST_REG,
2626                                  IWL39_RTC_INST_LOWER_BOUND);
2627         iwl_write_prph(priv, BSM_WR_DWCOUNT_REG, len / sizeof(u32));
2628
2629         /* Load bootstrap code into instruction SRAM now,
2630          *   to prepare to load "initialize" uCode */
2631         iwl_write_prph(priv, BSM_WR_CTRL_REG,
2632                 BSM_WR_CTRL_REG_BIT_START);
2633
2634         /* Wait for load of bootstrap uCode to finish */
2635         for (i = 0; i < 100; i++) {
2636                 done = iwl_read_prph(priv, BSM_WR_CTRL_REG);
2637                 if (!(done & BSM_WR_CTRL_REG_BIT_START))
2638                         break;
2639                 udelay(10);
2640         }
2641         if (i < 100)
2642                 IWL_DEBUG_INFO("BSM write complete, poll %d iterations\n", i);
2643         else {
2644                 IWL_ERR(priv, "BSM write did not complete!\n");
2645                 return -EIO;
2646         }
2647
2648         /* Enable future boot loads whenever power management unit triggers it
2649          *   (e.g. when powering back up after power-save shutdown) */
2650         iwl_write_prph(priv, BSM_WR_CTRL_REG,
2651                 BSM_WR_CTRL_REG_BIT_START_EN);
2652
2653         iwl_release_nic_access(priv);
2654
2655         return 0;
2656 }
2657
2658 static struct iwl_lib_ops iwl3945_lib = {
2659         .load_ucode = iwl3945_load_bsm,
2660 };
2661
2662 static struct iwl_ops iwl3945_ops = {
2663         .lib = &iwl3945_lib,
2664 };
2665
2666 static struct iwl_cfg iwl3945_bg_cfg = {
2667         .name = "3945BG",
2668         .fw_name_pre = IWL3945_FW_PRE,
2669         .ucode_api_max = IWL3945_UCODE_API_MAX,
2670         .ucode_api_min = IWL3945_UCODE_API_MIN,
2671         .sku = IWL_SKU_G,
2672         .ops = &iwl3945_ops,
2673         .mod_params = &iwl3945_mod_params
2674 };
2675
2676 static struct iwl_cfg iwl3945_abg_cfg = {
2677         .name = "3945ABG",
2678         .fw_name_pre = IWL3945_FW_PRE,
2679         .ucode_api_max = IWL3945_UCODE_API_MAX,
2680         .ucode_api_min = IWL3945_UCODE_API_MIN,
2681         .sku = IWL_SKU_A|IWL_SKU_G,
2682         .ops = &iwl3945_ops,
2683         .mod_params = &iwl3945_mod_params
2684 };
2685
2686 struct pci_device_id iwl3945_hw_card_ids[] = {
2687         {IWL_PCI_DEVICE(0x4222, 0x1005, iwl3945_bg_cfg)},
2688         {IWL_PCI_DEVICE(0x4222, 0x1034, iwl3945_bg_cfg)},
2689         {IWL_PCI_DEVICE(0x4222, 0x1044, iwl3945_bg_cfg)},
2690         {IWL_PCI_DEVICE(0x4227, 0x1014, iwl3945_bg_cfg)},
2691         {IWL_PCI_DEVICE(0x4222, PCI_ANY_ID, iwl3945_abg_cfg)},
2692         {IWL_PCI_DEVICE(0x4227, PCI_ANY_ID, iwl3945_abg_cfg)},
2693         {0}
2694 };
2695
2696 MODULE_DEVICE_TABLE(pci, iwl3945_hw_card_ids);