drivers/net/wireless/iwlwifi/iwl-3945.c

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2007 Intel Corporation. All rights reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms of version 2 of the GNU General Public License as
   7  * published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  12  * more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along with
  15  * this program; if not, write to the Free Software Foundation, Inc.,
  16  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
  17  *
  18  * The full GNU General Public License is included in this distribution in the
  19  * file called LICENSE.
  20  *
  21  * Contact Information:
  22  * James P. Ketrenos <ipw2100-admin@linux.intel.com>
  23  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  24  *
  25  *****************************************************************************/
  26
  27 #include <linux/kernel.h>
  28 #include <linux/module.h>
  29 #include <linux/version.h>
  30 #include <linux/init.h>
  31 #include <linux/pci.h>
  32 #include <linux/dma-mapping.h>
  33 #include <linux/delay.h>
  34 #include <linux/skbuff.h>
  35 #include <linux/netdevice.h>
  36 #include <linux/wireless.h>
  37 #include <linux/firmware.h>
  38 #include <net/mac80211.h>
  39
  40 #include <linux/etherdevice.h>
  41
  42 #define IWL 3945
  43
  44 #include "iwlwifi.h"
  45 #include "iwl-helpers.h"
  46 #include "iwl-3945.h"
  47 #include "iwl-3945-rs.h"
  48
  49 #define IWL_DECLARE_RATE_INFO(r, ip, in, rp, rn, pp, np)    \
  50         [IWL_RATE_##r##M_INDEX] = { IWL_RATE_##r##M_PLCP,   \
  51                                     IWL_RATE_##r##M_IEEE,   \
  52                                     IWL_RATE_##ip##M_INDEX, \
  53                                     IWL_RATE_##in##M_INDEX, \
  54                                     IWL_RATE_##rp##M_INDEX, \
  55                                     IWL_RATE_##rn##M_INDEX, \
  56                                     IWL_RATE_##pp##M_INDEX, \
  57                                     IWL_RATE_##np##M_INDEX, \
  58                                     IWL_RATE_##r##M_INDEX_TABLE, \
  59                                     IWL_RATE_##ip##M_INDEX_TABLE }
  60
  61 /*
  62  * Parameter order:
  63  *   rate, prev rate, next rate, prev tgg rate, next tgg rate
  64  *
  65  * If there isn't a valid next or previous rate then INV is used which
  66  * maps to IWL_RATE_INVALID
  67  *
  68  */
  69 const struct iwl_rate_info iwl_rates[IWL_RATE_COUNT] = {
  70         IWL_DECLARE_RATE_INFO(1, INV, 2, INV, 2, INV, 2),    /*  1mbps */
  71         IWL_DECLARE_RATE_INFO(2, 1, 5, 1, 5, 1, 5),          /*  2mbps */
  72         IWL_DECLARE_RATE_INFO(5, 2, 6, 2, 11, 2, 11),        /*5.5mbps */
  73         IWL_DECLARE_RATE_INFO(11, 9, 12, 5, 12, 5, 18),      /* 11mbps */
  74         IWL_DECLARE_RATE_INFO(6, 5, 9, 5, 11, 5, 11),        /*  6mbps */
  75         IWL_DECLARE_RATE_INFO(9, 6, 11, 5, 11, 5, 11),       /*  9mbps */
  76         IWL_DECLARE_RATE_INFO(12, 11, 18, 11, 18, 11, 18),   /* 12mbps */
  77         IWL_DECLARE_RATE_INFO(18, 12, 24, 12, 24, 11, 24),   /* 18mbps */
  78         IWL_DECLARE_RATE_INFO(24, 18, 36, 18, 36, 18, 36),   /* 24mbps */
  79         IWL_DECLARE_RATE_INFO(36, 24, 48, 24, 48, 24, 48),   /* 36mbps */
  80         IWL_DECLARE_RATE_INFO(48, 36, 54, 36, 54, 36, 54),   /* 48mbps */
  81         IWL_DECLARE_RATE_INFO(54, 48, INV, 48, INV, 48, INV),/* 54mbps */
  82 };
  83
  84 /* 1 = enable the iwl_disable_events() function */
  85 #define IWL_EVT_DISABLE (0)
  86 #define IWL_EVT_DISABLE_SIZE (1532/32)
  87
  88 /**
  89  * iwl_disable_events - Disable selected events in uCode event log
  90  *
  91  * Disable an event by writing "1"s into "disable"
  92  *   bitmap in SRAM.  Bit position corresponds to Event # (id/type).
  93  *   Default values of 0 enable uCode events to be logged.
  94  * Use for only special debugging.  This function is just a placeholder as-is,
  95  *   you'll need to provide the special bits! ...
  96  *   ... and set IWL_EVT_DISABLE to 1. */
  97 void iwl_disable_events(struct iwl_priv *priv)
  98 {
  99         int rc;
 100         int i;
 101         u32 base;               /* SRAM address of event log header */
 102         u32 disable_ptr;        /* SRAM address of event-disable bitmap array */
 103         u32 array_size;         /* # of u32 entries in array */
 104         u32 evt_disable[IWL_EVT_DISABLE_SIZE] = {
 105                 0x00000000,     /*   31 -    0  Event id numbers */
 106                 0x00000000,     /*   63 -   32 */
 107                 0x00000000,     /*   95 -   64 */
 108                 0x00000000,     /*  127 -   96 */
 109                 0x00000000,     /*  159 -  128 */
 110                 0x00000000,     /*  191 -  160 */
 111                 0x00000000,     /*  223 -  192 */
 112                 0x00000000,     /*  255 -  224 */
 113                 0x00000000,     /*  287 -  256 */
 114                 0x00000000,     /*  319 -  288 */
 115                 0x00000000,     /*  351 -  320 */
 116                 0x00000000,     /*  383 -  352 */
 117                 0x00000000,     /*  415 -  384 */
 118                 0x00000000,     /*  447 -  416 */
 119                 0x00000000,     /*  479 -  448 */
 120                 0x00000000,     /*  511 -  480 */
 121                 0x00000000,     /*  543 -  512 */
 122                 0x00000000,     /*  575 -  544 */
 123                 0x00000000,     /*  607 -  576 */
 124                 0x00000000,     /*  639 -  608 */
 125                 0x00000000,     /*  671 -  640 */
 126                 0x00000000,     /*  703 -  672 */
 127                 0x00000000,     /*  735 -  704 */
 128                 0x00000000,     /*  767 -  736 */
 129                 0x00000000,     /*  799 -  768 */
 130                 0x00000000,     /*  831 -  800 */
 131                 0x00000000,     /*  863 -  832 */
 132                 0x00000000,     /*  895 -  864 */
 133                 0x00000000,     /*  927 -  896 */
 134                 0x00000000,     /*  959 -  928 */
 135                 0x00000000,     /*  991 -  960 */
 136                 0x00000000,     /* 1023 -  992 */
 137                 0x00000000,     /* 1055 - 1024 */
 138                 0x00000000,     /* 1087 - 1056 */
 139                 0x00000000,     /* 1119 - 1088 */
 140                 0x00000000,     /* 1151 - 1120 */
 141                 0x00000000,     /* 1183 - 1152 */
 142                 0x00000000,     /* 1215 - 1184 */
 143                 0x00000000,     /* 1247 - 1216 */
 144                 0x00000000,     /* 1279 - 1248 */
 145                 0x00000000,     /* 1311 - 1280 */
 146                 0x00000000,     /* 1343 - 1312 */
 147                 0x00000000,     /* 1375 - 1344 */
 148                 0x00000000,     /* 1407 - 1376 */
 149                 0x00000000,     /* 1439 - 1408 */
 150                 0x00000000,     /* 1471 - 1440 */
 151                 0x00000000,     /* 1503 - 1472 */
 152         };
 153
 154         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
 155         if (!iwl_hw_valid_rtc_data_addr(base)) {
 156                 IWL_ERROR("Invalid event log pointer 0x%08X\n", base);
 157                 return;
 158         }
 159
 160         rc = iwl_grab_restricted_access(priv);
 161         if (rc) {
 162                 IWL_WARNING("Can not read from adapter at this time.\n");
 163                 return;
 164         }
 165
 166         disable_ptr = iwl_read_restricted_mem(priv, base + (4 * sizeof(u32)));
 167         array_size = iwl_read_restricted_mem(priv, base + (5 * sizeof(u32)));
 168         iwl_release_restricted_access(priv);
 169
 170         if (IWL_EVT_DISABLE && (array_size == IWL_EVT_DISABLE_SIZE)) {
 171                 IWL_DEBUG_INFO("Disabling selected uCode log events at 0x%x\n",
 172                                disable_ptr);
 173                 rc = iwl_grab_restricted_access(priv);
 174                 for (i = 0; i < IWL_EVT_DISABLE_SIZE; i++)
 175                         iwl_write_restricted_mem(priv,
 176                                                  disable_ptr +
 177                                                  (i * sizeof(u32)),
 178                                                  evt_disable[i]);
 179
 180                 iwl_release_restricted_access(priv);
 181         } else {
 182                 IWL_DEBUG_INFO("Selected uCode log events may be disabled\n");
 183                 IWL_DEBUG_INFO("  by writing \"1\"s into disable bitmap\n");
 184                 IWL_DEBUG_INFO("  in SRAM at 0x%x, size %d u32s\n",
 185                                disable_ptr, array_size);
 186         }
 187
 188 }
 189
 190 /**
 191  * iwl3945_get_antenna_flags - Get antenna flags for RXON command
 192  * @priv: eeprom and antenna fields are used to determine antenna flags
 193  *
 194  * priv->eeprom  is used to determine if antenna AUX/MAIN are reversed
 195  * priv->antenna specifies the antenna diversity mode:
 196  *
 197  * IWL_ANTENNA_DIVERISTY - NIC selects best antenna by itself
 198  * IWL_ANTENNA_MAIN      - Force MAIN antenna
 199  * IWL_ANTENNA_AUX       - Force AUX antenna
 200  */
 201 __le32 iwl3945_get_antenna_flags(const struct iwl_priv *priv)
 202 {
 203         switch (priv->antenna) {
 204         case IWL_ANTENNA_DIVERSITY:
 205                 return 0;
 206
 207         case IWL_ANTENNA_MAIN:
 208                 if (priv->eeprom.antenna_switch_type)
 209                         return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_B_MSK;
 210                 return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_A_MSK;
 211
 212         case IWL_ANTENNA_AUX:
 213                 if (priv->eeprom.antenna_switch_type)
 214                         return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_A_MSK;
 215                 return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_B_MSK;
 216         }
 217
 218         /* bad antenna selector value */
 219         IWL_ERROR("Bad antenna selector value (0x%x)\n", priv->antenna);
 220         return 0;               /* "diversity" is default if error */
 221 }
 222
 223 /*****************************************************************************
 224  *
 225  * Intel PRO/Wireless 3945ABG/BG Network Connection
 226  *
 227  *  RX handler implementations
 228  *
 229  *  Used by iwl-base.c
 230  *
 231  *****************************************************************************/
 232
 233 void iwl_hw_rx_statistics(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
 234 {
 235         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
 236         IWL_DEBUG_RX("Statistics notification received (%d vs %d).\n",
 237                      (int)sizeof(struct iwl_notif_statistics),
 238                      le32_to_cpu(pkt->len));
 239
 240         memcpy(&priv->statistics, pkt->u.raw, sizeof(priv->statistics));
 241
 242         priv->last_statistics_time = jiffies;
 243 }
 244
 245 static void iwl3945_handle_data_packet(struct iwl_priv *priv, int is_data,
 246                                    struct iwl_rx_mem_buffer *rxb,
 247                                    struct ieee80211_rx_status *stats,
 248                                    u16 phy_flags)
 249 {
 250         struct ieee80211_hdr *hdr;
 251         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
 252         struct iwl_rx_frame_hdr *rx_hdr = IWL_RX_HDR(pkt);
 253         struct iwl_rx_frame_end *rx_end = IWL_RX_END(pkt);
 254         short len = le16_to_cpu(rx_hdr->len);
 255
 256         /* We received data from the HW, so stop the watchdog */
 257         if (unlikely((len + IWL_RX_FRAME_SIZE) > skb_tailroom(rxb->skb))) {
 258                 IWL_DEBUG_DROP("Corruption detected!\n");
 259                 return;
 260         }
 261
 262         /* We only process data packets if the interface is open */
 263         if (unlikely(!priv->is_open)) {
 264                 IWL_DEBUG_DROP_LIMIT
 265                     ("Dropping packet while interface is not open.\n");
 266                 return;
 267         }
 268         if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR) {
 269                 if (iwl_param_hwcrypto)
 270                         iwl_set_decrypted_flag(priv, rxb->skb,
 271                                                le32_to_cpu(rx_end->status),
 272                                                stats);
 273                 iwl_handle_data_packet_monitor(priv, rxb, IWL_RX_DATA(pkt),
 274                                                len, stats, phy_flags);
 275                 return;
 276         }
 277
 278         skb_reserve(rxb->skb, (void *)rx_hdr->payload - (void *)pkt);
 279         /* Set the size of the skb to the size of the frame */
 280         skb_put(rxb->skb, le16_to_cpu(rx_hdr->len));
 281
 282         hdr = (void *)rxb->skb->data;
 283
 284         if (iwl_param_hwcrypto)
 285                 iwl_set_decrypted_flag(priv, rxb->skb,
 286                                        le32_to_cpu(rx_end->status), stats);
 287
 288         ieee80211_rx_irqsafe(priv->hw, rxb->skb, stats);
 289         rxb->skb = NULL;
 290 }
 291
 292 static void iwl3945_rx_reply_rx(struct iwl_priv *priv,
 293                                 struct iwl_rx_mem_buffer *rxb)
 294 {
 295         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
 296         struct iwl_rx_frame_stats *rx_stats = IWL_RX_STATS(pkt);
 297         struct iwl_rx_frame_hdr *rx_hdr = IWL_RX_HDR(pkt);
 298         struct iwl_rx_frame_end *rx_end = IWL_RX_END(pkt);
 299         struct ieee80211_hdr *header;
 300         u16 phy_flags = le16_to_cpu(rx_hdr->phy_flags);
 301         u16 rx_stats_sig_avg = le16_to_cpu(rx_stats->sig_avg);
 302         u16 rx_stats_noise_diff = le16_to_cpu(rx_stats->noise_diff);
 303         struct ieee80211_rx_status stats = {
 304                 .mactime = le64_to_cpu(rx_end->timestamp),
 305                 .freq = ieee80211chan2mhz(le16_to_cpu(rx_hdr->channel)),
 306                 .channel = le16_to_cpu(rx_hdr->channel),
 307                 .phymode = (rx_hdr->phy_flags & RX_RES_PHY_FLAGS_BAND_24_MSK) ?
 308                 MODE_IEEE80211G : MODE_IEEE80211A,
 309                 .antenna = 0,
 310                 .rate = rx_hdr->rate,
 311                 .flag = 0,
 312         };
 313         u8 network_packet;
 314         int snr;
 315
 316         if ((unlikely(rx_stats->phy_count > 20))) {
 317                 IWL_DEBUG_DROP
 318                     ("dsp size out of range [0,20]: "
 319                      "%d/n", rx_stats->phy_count);
 320                 return;
 321         }
 322
 323         if (!(rx_end->status & RX_RES_STATUS_NO_CRC32_ERROR)
 324             || !(rx_end->status & RX_RES_STATUS_NO_RXE_OVERFLOW)) {
 325                 IWL_DEBUG_RX("Bad CRC or FIFO: 0x%08X.\n", rx_end->status);
 326                 return;
 327         }
 328
 329         if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR) {
 330                 iwl3945_handle_data_packet(priv, 1, rxb, &stats, phy_flags);
 331                 return;
 332         }
 333
 334         /* Convert 3945's rssi indicator to dBm */
 335         stats.ssi = rx_stats->rssi - IWL_RSSI_OFFSET;
 336
 337         /* Set default noise value to -127 */
 338         if (priv->last_rx_noise == 0)
 339                 priv->last_rx_noise = IWL_NOISE_MEAS_NOT_AVAILABLE;
 340
 341         /* 3945 provides noise info for OFDM frames only.
 342          * sig_avg and noise_diff are measured by the 3945's digital signal
 343          *   processor (DSP), and indicate linear levels of signal level and
 344          *   distortion/noise within the packet preamble after
 345          *   automatic gain control (AGC).  sig_avg should stay fairly
 346          *   constant if the radio's AGC is working well.
 347          * Since these values are linear (not dB or dBm), linear
 348          *   signal-to-noise ratio (SNR) is (sig_avg / noise_diff).
 349          * Convert linear SNR to dB SNR, then subtract that from rssi dBm
 350          *   to obtain noise level in dBm.
 351          * Calculate stats.signal (quality indicator in %) based on SNR. */
 352         if (rx_stats_noise_diff) {
 353                 snr = rx_stats_sig_avg / rx_stats_noise_diff;
 354                 stats.noise = stats.ssi - iwl_calc_db_from_ratio(snr);
 355                 stats.signal = iwl_calc_sig_qual(stats.ssi, stats.noise);
 356
 357         /* If noise info not available, calculate signal quality indicator (%)
 358          *   using just the dBm signal level. */
 359         } else {
 360                 stats.noise = priv->last_rx_noise;
 361                 stats.signal = iwl_calc_sig_qual(stats.ssi, 0);
 362         }
 363
 364
 365         IWL_DEBUG_STATS("Rssi %d noise %d qual %d sig_avg %d noise_diff %d\n",
 366                         stats.ssi, stats.noise, stats.signal,
 367                         rx_stats_sig_avg, rx_stats_noise_diff);
 368
 369         stats.freq = ieee80211chan2mhz(stats.channel);
 370
 371         /* can be covered by iwl_report_frame() in most cases */
 372 /*      IWL_DEBUG_RX("RX status: 0x%08X\n", rx_end->status); */
 373
 374         header = (struct ieee80211_hdr *)IWL_RX_DATA(pkt);
 375
 376         network_packet = iwl_is_network_packet(priv, header);
 377
 378 #ifdef CONFIG_IWLWIFI_DEBUG
 379         if (iwl_debug_level & IWL_DL_STATS && net_ratelimit())
 380                 IWL_DEBUG_STATS
 381                     ("[%c] %d RSSI: %d Signal: %u, Noise: %u, Rate: %u\n",
 382                      network_packet ? '*' : ' ',
 383                      stats.channel, stats.ssi, stats.ssi,
 384                      stats.ssi, stats.rate);
 385
 386         if (iwl_debug_level & (IWL_DL_RX))
 387                 /* Set "1" to report good data frames in groups of 100 */
 388                 iwl_report_frame(priv, pkt, header, 1);
 389 #endif
 390
 391         if (network_packet) {
 392                 priv->last_beacon_time = le32_to_cpu(rx_end->beacon_timestamp);
 393                 priv->last_tsf = le64_to_cpu(rx_end->timestamp);
 394                 priv->last_rx_rssi = stats.ssi;
 395                 priv->last_rx_noise = stats.noise;
 396         }
 397
 398         switch (le16_to_cpu(header->frame_control) & IEEE80211_FCTL_FTYPE) {
 399         case IEEE80211_FTYPE_MGMT:
 400                 switch (le16_to_cpu(header->frame_control) &
 401                         IEEE80211_FCTL_STYPE) {
 402                 case IEEE80211_STYPE_PROBE_RESP:
 403                 case IEEE80211_STYPE_BEACON:{
 404                                 /* If this is a beacon or probe response for
 405                                  * our network then cache the beacon
 406                                  * timestamp */
 407                                 if ((((priv->iw_mode == IEEE80211_IF_TYPE_STA)
 408                                       && !compare_ether_addr(header->addr2,
 409                                                              priv->bssid)) ||
 410                                      ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
 411                                       && !compare_ether_addr(header->addr3,
 412                                                              priv->bssid)))) {
 413                                         struct ieee80211_mgmt *mgmt =
 414                                             (struct ieee80211_mgmt *)header;
 415                                         __le32 *pos;
 416                                         pos =
 417                                             (__le32 *) & mgmt->u.beacon.
 418                                             timestamp;
 419                                         priv->timestamp0 = le32_to_cpu(pos[0]);
 420                                         priv->timestamp1 = le32_to_cpu(pos[1]);
 421                                         priv->beacon_int = le16_to_cpu(
 422                                             mgmt->u.beacon.beacon_int);
 423                                         if (priv->call_post_assoc_from_beacon &&
 424                                             (priv->iw_mode ==
 425                                                 IEEE80211_IF_TYPE_STA))
 426                                                 queue_work(priv->workqueue,
 427                                                     &priv->post_associate.work);
 428
 429                                         priv->call_post_assoc_from_beacon = 0;
 430                                 }
 431
 432                                 break;
 433                         }
 434
 435                 case IEEE80211_STYPE_ACTION:
 436                         /* TODO: Parse 802.11h frames for CSA... */
 437                         break;
 438
 439                         /*
 440                          * TODO: There is no callback function from upper
 441                          * stack to inform us when associated status. this
 442                          * work around to sniff assoc_resp management frame
 443                          * and finish the association process.
 444                          */
 445                 case IEEE80211_STYPE_ASSOC_RESP:
 446                 case IEEE80211_STYPE_REASSOC_RESP:{
 447                                 struct ieee80211_mgmt *mgnt =
 448                                     (struct ieee80211_mgmt *)header;
 449                                 priv->assoc_id = (~((1 << 15) | (1 << 14)) &
 450                                                   le16_to_cpu(mgnt->u.
 451                                                               assoc_resp.aid));
 452                                 priv->assoc_capability =
 453                                     le16_to_cpu(mgnt->u.assoc_resp.capab_info);
 454                                 if (priv->beacon_int)
 455                                         queue_work(priv->workqueue,
 456                                             &priv->post_associate.work);
 457                                 else
 458                                         priv->call_post_assoc_from_beacon = 1;
 459                                 break;
 460                         }
 461
 462                 case IEEE80211_STYPE_PROBE_REQ:{
 463                                 DECLARE_MAC_BUF(mac1);
 464                                 DECLARE_MAC_BUF(mac2);
 465                                 DECLARE_MAC_BUF(mac3);
 466                                 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
 467                                         IWL_DEBUG_DROP
 468                                             ("Dropping (non network): %s"
 469                                              ", %s, %s\n",
 470                                              print_mac(mac1, header->addr1),
 471                                              print_mac(mac2, header->addr2),
 472                                              print_mac(mac3, header->addr3));
 473                                 return;
 474                         }
 475                 }
 476
 477                 iwl3945_handle_data_packet(priv, 0, rxb, &stats, phy_flags);
 478                 break;
 479
 480         case IEEE80211_FTYPE_CTL:
 481                 break;
 482
 483         case IEEE80211_FTYPE_DATA: {
 484                 DECLARE_MAC_BUF(mac1);
 485                 DECLARE_MAC_BUF(mac2);
 486                 DECLARE_MAC_BUF(mac3);
 487
 488                 if (unlikely(is_duplicate_packet(priv, header)))
 489                         IWL_DEBUG_DROP("Dropping (dup): %s, %s, %s\n",
 490                                        print_mac(mac1, header->addr1),
 491                                        print_mac(mac2, header->addr2),
 492                                        print_mac(mac3, header->addr3));
 493                 else
 494                         iwl3945_handle_data_packet(priv, 1, rxb, &stats,
 495                                                    phy_flags);
 496                 break;
 497         }
 498         }
 499 }
 500
 501 int iwl_hw_txq_attach_buf_to_tfd(struct iwl_priv *priv, void *ptr,
 502                                  dma_addr_t addr, u16 len)
 503 {
 504         int count;
 505         u32 pad;
 506         struct iwl_tfd_frame *tfd = (struct iwl_tfd_frame *)ptr;
 507
 508         count = TFD_CTL_COUNT_GET(le32_to_cpu(tfd->control_flags));
 509         pad = TFD_CTL_PAD_GET(le32_to_cpu(tfd->control_flags));
 510
 511         if ((count >= NUM_TFD_CHUNKS) || (count < 0)) {
 512                 IWL_ERROR("Error can not send more than %d chunks\n",
 513                           NUM_TFD_CHUNKS);
 514                 return -EINVAL;
 515         }
 516
 517         tfd->pa[count].addr = cpu_to_le32(addr);
 518         tfd->pa[count].len = cpu_to_le32(len);
 519
 520         count++;
 521
 522         tfd->control_flags = cpu_to_le32(TFD_CTL_COUNT_SET(count) |
 523                                          TFD_CTL_PAD_SET(pad));
 524
 525         return 0;
 526 }
 527
 528 /**
 529  * iwl_hw_txq_free_tfd - Free one TFD, those at index [txq->q.last_used]
 530  *
 531  * Does NOT advance any indexes
 532  */
 533 int iwl_hw_txq_free_tfd(struct iwl_priv *priv, struct iwl_tx_queue *txq)
 534 {
 535         struct iwl_tfd_frame *bd_tmp = (struct iwl_tfd_frame *)&txq->bd[0];
 536         struct iwl_tfd_frame *bd = &bd_tmp[txq->q.last_used];
 537         struct pci_dev *dev = priv->pci_dev;
 538         int i;
 539         int counter;
 540
 541         /* classify bd */
 542         if (txq->q.id == IWL_CMD_QUEUE_NUM)
 543                 /* nothing to cleanup after for host commands */
 544                 return 0;
 545
 546         /* sanity check */
 547         counter = TFD_CTL_COUNT_GET(le32_to_cpu(bd->control_flags));
 548         if (counter > NUM_TFD_CHUNKS) {
 549                 IWL_ERROR("Too many chunks: %i\n", counter);
 550                 /* @todo issue fatal error, it is quite serious situation */
 551                 return 0;
 552         }
 553
 554         /* unmap chunks if any */
 555
 556         for (i = 1; i < counter; i++) {
 557                 pci_unmap_single(dev, le32_to_cpu(bd->pa[i].addr),
 558                                  le32_to_cpu(bd->pa[i].len), PCI_DMA_TODEVICE);
 559                 if (txq->txb[txq->q.last_used].skb[0]) {
 560                         struct sk_buff *skb = txq->txb[txq->q.last_used].skb[0];
 561                         if (txq->txb[txq->q.last_used].skb[0]) {
 562                                 /* Can be called from interrupt context */
 563                                 dev_kfree_skb_any(skb);
 564                                 txq->txb[txq->q.last_used].skb[0] = NULL;
 565                         }
 566                 }
 567         }
 568         return 0;
 569 }
 570
 571 u8 iwl_hw_find_station(struct iwl_priv *priv, const u8 *addr)
 572 {
 573         int i;
 574         int ret = IWL_INVALID_STATION;
 575         unsigned long flags;
 576         DECLARE_MAC_BUF(mac);
 577
 578         spin_lock_irqsave(&priv->sta_lock, flags);
 579         for (i = IWL_STA_ID; i < priv->hw_setting.max_stations; i++)
 580                 if ((priv->stations[i].used) &&
 581                     (!compare_ether_addr
 582                      (priv->stations[i].sta.sta.addr, addr))) {
 583                         ret = i;
 584                         goto out;
 585                 }
 586
 587         IWL_DEBUG_INFO("can not find STA %s (total %d)\n",
 588                        print_mac(mac, addr), priv->num_stations);
 589  out:
 590         spin_unlock_irqrestore(&priv->sta_lock, flags);
 591         return ret;
 592 }
 593
 594 /**
 595  * iwl_hw_build_tx_cmd_rate - Add rate portion to TX_CMD:
 596  *
 597 */
 598 void iwl_hw_build_tx_cmd_rate(struct iwl_priv *priv,
 599                               struct iwl_cmd *cmd,
 600                               struct ieee80211_tx_control *ctrl,
 601                               struct ieee80211_hdr *hdr, int sta_id, int tx_id)
 602 {
 603         unsigned long flags;
 604         u16 rate_index = min(ctrl->tx_rate & 0xffff, IWL_RATE_COUNT - 1);
 605         u16 rate_mask;
 606         int rate;
 607         u8 rts_retry_limit;
 608         u8 data_retry_limit;
 609         __le32 tx_flags;
 610         u16 fc = le16_to_cpu(hdr->frame_control);
 611
 612         rate = iwl_rates[rate_index].plcp;
 613         tx_flags = cmd->cmd.tx.tx_flags;
 614
 615         /* We need to figure out how to get the sta->supp_rates while
 616          * in this running context; perhaps encoding into ctrl->tx_rate? */
 617         rate_mask = IWL_RATES_MASK;
 618
 619         spin_lock_irqsave(&priv->sta_lock, flags);
 620
 621         priv->stations[sta_id].current_rate.rate_n_flags = rate;
 622
 623         if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) &&
 624             (sta_id != IWL3945_BROADCAST_ID) &&
 625                 (sta_id != IWL_MULTICAST_ID))
 626                 priv->stations[IWL_STA_ID].current_rate.rate_n_flags = rate;
 627
 628         spin_unlock_irqrestore(&priv->sta_lock, flags);
 629
 630         if (tx_id >= IWL_CMD_QUEUE_NUM)
 631                 rts_retry_limit = 3;
 632         else
 633                 rts_retry_limit = 7;
 634
 635         if (ieee80211_is_probe_response(fc)) {
 636                 data_retry_limit = 3;
 637                 if (data_retry_limit < rts_retry_limit)
 638                         rts_retry_limit = data_retry_limit;
 639         } else
 640                 data_retry_limit = IWL_DEFAULT_TX_RETRY;
 641
 642         if (priv->data_retry_limit != -1)
 643                 data_retry_limit = priv->data_retry_limit;
 644
 645         if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
 646                 switch (fc & IEEE80211_FCTL_STYPE) {
 647                 case IEEE80211_STYPE_AUTH:
 648                 case IEEE80211_STYPE_DEAUTH:
 649                 case IEEE80211_STYPE_ASSOC_REQ:
 650                 case IEEE80211_STYPE_REASSOC_REQ:
 651                         if (tx_flags & TX_CMD_FLG_RTS_MSK) {
 652                                 tx_flags &= ~TX_CMD_FLG_RTS_MSK;
 653                                 tx_flags |= TX_CMD_FLG_CTS_MSK;
 654                         }
 655                         break;
 656                 default:
 657                         break;
 658                 }
 659         }
 660
 661         cmd->cmd.tx.rts_retry_limit = rts_retry_limit;
 662         cmd->cmd.tx.data_retry_limit = data_retry_limit;
 663         cmd->cmd.tx.rate = rate;
 664         cmd->cmd.tx.tx_flags = tx_flags;
 665
 666         /* OFDM */
 667         cmd->cmd.tx.supp_rates[0] =
 668            ((rate_mask & IWL_OFDM_RATES_MASK) >> IWL_FIRST_OFDM_RATE) & 0xFF;
 669
 670         /* CCK */
 671         cmd->cmd.tx.supp_rates[1] = (rate_mask & 0xF);
 672
 673         IWL_DEBUG_RATE("Tx sta id: %d, rate: %d (plcp), flags: 0x%4X "
 674                        "cck/ofdm mask: 0x%x/0x%x\n", sta_id,
 675                        cmd->cmd.tx.rate, le32_to_cpu(cmd->cmd.tx.tx_flags),
 676                        cmd->cmd.tx.supp_rates[1], cmd->cmd.tx.supp_rates[0]);
 677 }
 678
 679 u8 iwl3945_sync_sta(struct iwl_priv *priv, int sta_id, u16 tx_rate, u8 flags)
 680 {
 681         unsigned long flags_spin;
 682         struct iwl_station_entry *station;
 683
 684         if (sta_id == IWL_INVALID_STATION)
 685                 return IWL_INVALID_STATION;
 686
 687         spin_lock_irqsave(&priv->sta_lock, flags_spin);
 688         station = &priv->stations[sta_id];
 689
 690         station->sta.sta.modify_mask = STA_MODIFY_TX_RATE_MSK;
 691         station->sta.rate_n_flags = cpu_to_le16(tx_rate);
 692         station->current_rate.rate_n_flags = tx_rate;
 693         station->sta.mode = STA_CONTROL_MODIFY_MSK;
 694
 695         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 696
 697         iwl_send_add_station(priv, &station->sta, flags);
 698         IWL_DEBUG_RATE("SCALE sync station %d to rate %d\n",
 699                         sta_id, tx_rate);
 700         return sta_id;
 701 }
 702
 703 void iwl_hw_card_show_info(struct iwl_priv *priv)
 704 {
 705         IWL_DEBUG_INFO("3945ABG HW Version %u.%u.%u\n",
 706                        ((priv->eeprom.board_revision >> 8) & 0x0F),
 707                        ((priv->eeprom.board_revision >> 8) >> 4),
 708                        (priv->eeprom.board_revision & 0x00FF));
 709
 710         IWL_DEBUG_INFO("3945ABG PBA Number %.*s\n",
 711                        (int)sizeof(priv->eeprom.board_pba_number),
 712                        priv->eeprom.board_pba_number);
 713
 714         IWL_DEBUG_INFO("EEPROM_ANTENNA_SWITCH_TYPE is 0x%02X\n",
 715                        priv->eeprom.antenna_switch_type);
 716 }
 717
 718 static int iwl3945_nic_set_pwr_src(struct iwl_priv *priv, int pwr_max)
 719 {
 720         int rc;
 721         unsigned long flags;
 722
 723         spin_lock_irqsave(&priv->lock, flags);
 724         rc = iwl_grab_restricted_access(priv);
 725         if (rc) {
 726                 spin_unlock_irqrestore(&priv->lock, flags);
 727                 return rc;
 728         }
 729
 730         if (!pwr_max) {
 731                 u32 val;
 732
 733                 rc = pci_read_config_dword(priv->pci_dev,
 734                                 PCI_POWER_SOURCE, &val);
 735                 if (val & PCI_CFG_PMC_PME_FROM_D3COLD_SUPPORT) {
 736                         iwl_set_bits_mask_restricted_reg(priv, APMG_PS_CTRL_REG,
 737                                         APMG_PS_CTRL_VAL_PWR_SRC_VAUX,
 738                                         ~APMG_PS_CTRL_MSK_PWR_SRC);
 739                         iwl_release_restricted_access(priv);
 740
 741                         iwl_poll_bit(priv, CSR_GPIO_IN,
 742                                      CSR_GPIO_IN_VAL_VAUX_PWR_SRC,
 743                                      CSR_GPIO_IN_BIT_AUX_POWER, 5000);
 744                 } else
 745                         iwl_release_restricted_access(priv);
 746         } else {
 747                 iwl_set_bits_mask_restricted_reg(priv, APMG_PS_CTRL_REG,
 748                                 APMG_PS_CTRL_VAL_PWR_SRC_VMAIN,
 749                                 ~APMG_PS_CTRL_MSK_PWR_SRC);
 750
 751                 iwl_release_restricted_access(priv);
 752                 iwl_poll_bit(priv, CSR_GPIO_IN, CSR_GPIO_IN_VAL_VMAIN_PWR_SRC,
 753                              CSR_GPIO_IN_BIT_AUX_POWER, 5000);  /* uS */
 754         }
 755         spin_unlock_irqrestore(&priv->lock, flags);
 756
 757         return rc;
 758 }
 759
 760 static int iwl3945_rx_init(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
 761 {
 762         int rc;
 763         unsigned long flags;
 764
 765         spin_lock_irqsave(&priv->lock, flags);
 766         rc = iwl_grab_restricted_access(priv);
 767         if (rc) {
 768                 spin_unlock_irqrestore(&priv->lock, flags);
 769                 return rc;
 770         }
 771
 772         iwl_write_restricted(priv, FH_RCSR_RBD_BASE(0), rxq->dma_addr);
 773         iwl_write_restricted(priv, FH_RCSR_RPTR_ADDR(0),
 774                              priv->hw_setting.shared_phys +
 775                              offsetof(struct iwl_shared, rx_read_ptr[0]));
 776         iwl_write_restricted(priv, FH_RCSR_WPTR(0), 0);
 777         iwl_write_restricted(priv, FH_RCSR_CONFIG(0),
 778                 ALM_FH_RCSR_RX_CONFIG_REG_VAL_DMA_CHNL_EN_ENABLE |
 779                 ALM_FH_RCSR_RX_CONFIG_REG_VAL_RDRBD_EN_ENABLE |
 780                 ALM_FH_RCSR_RX_CONFIG_REG_BIT_WR_STTS_EN |
 781                 ALM_FH_RCSR_RX_CONFIG_REG_VAL_MAX_FRAG_SIZE_128 |
 782                 (RX_QUEUE_SIZE_LOG << ALM_FH_RCSR_RX_CONFIG_REG_POS_RBDC_SIZE) |
 783                 ALM_FH_RCSR_RX_CONFIG_REG_VAL_IRQ_DEST_INT_HOST |
 784                 (1 << ALM_FH_RCSR_RX_CONFIG_REG_POS_IRQ_RBTH) |
 785                 ALM_FH_RCSR_RX_CONFIG_REG_VAL_MSG_MODE_FH);
 786
 787         /* fake read to flush all prev I/O */
 788         iwl_read_restricted(priv, FH_RSSR_CTRL);
 789
 790         iwl_release_restricted_access(priv);
 791         spin_unlock_irqrestore(&priv->lock, flags);
 792
 793         return 0;
 794 }
 795
 796 static int iwl3945_tx_reset(struct iwl_priv *priv)
 797 {
 798         int rc;
 799         unsigned long flags;
 800
 801         spin_lock_irqsave(&priv->lock, flags);
 802         rc = iwl_grab_restricted_access(priv);
 803         if (rc) {
 804                 spin_unlock_irqrestore(&priv->lock, flags);
 805                 return rc;
 806         }
 807
 808         /* bypass mode */
 809         iwl_write_restricted_reg(priv, SCD_MODE_REG, 0x2);
 810
 811         /* RA 0 is active */
 812         iwl_write_restricted_reg(priv, SCD_ARASTAT_REG, 0x01);
 813
 814         /* all 6 fifo are active */
 815         iwl_write_restricted_reg(priv, SCD_TXFACT_REG, 0x3f);
 816
 817         iwl_write_restricted_reg(priv, SCD_SBYP_MODE_1_REG, 0x010000);
 818         iwl_write_restricted_reg(priv, SCD_SBYP_MODE_2_REG, 0x030002);
 819         iwl_write_restricted_reg(priv, SCD_TXF4MF_REG, 0x000004);
 820         iwl_write_restricted_reg(priv, SCD_TXF5MF_REG, 0x000005);
 821
 822         iwl_write_restricted(priv, FH_TSSR_CBB_BASE,
 823                              priv->hw_setting.shared_phys);
 824
 825         iwl_write_restricted(priv, FH_TSSR_MSG_CONFIG,
 826                 ALM_FH_TSSR_TX_MSG_CONFIG_REG_VAL_SNOOP_RD_TXPD_ON |
 827                 ALM_FH_TSSR_TX_MSG_CONFIG_REG_VAL_ORDER_RD_TXPD_ON |
 828                 ALM_FH_TSSR_TX_MSG_CONFIG_REG_VAL_MAX_FRAG_SIZE_128B |
 829                 ALM_FH_TSSR_TX_MSG_CONFIG_REG_VAL_SNOOP_RD_TFD_ON |
 830                 ALM_FH_TSSR_TX_MSG_CONFIG_REG_VAL_ORDER_RD_CBB_ON |
 831                 ALM_FH_TSSR_TX_MSG_CONFIG_REG_VAL_ORDER_RSP_WAIT_TH |
 832                 ALM_FH_TSSR_TX_MSG_CONFIG_REG_VAL_RSP_WAIT_TH);
 833
 834         iwl_release_restricted_access(priv);
 835         spin_unlock_irqrestore(&priv->lock, flags);
 836
 837         return 0;
 838 }
 839
 840 /**
 841  * iwl3945_txq_ctx_reset - Reset TX queue context
 842  *
 843  * Destroys all DMA structures and initialize them again
 844  */
 845 static int iwl3945_txq_ctx_reset(struct iwl_priv *priv)
 846 {
 847         int rc;
 848         int txq_id, slots_num;
 849
 850         iwl_hw_txq_ctx_free(priv);
 851
 852         /* Tx CMD queue */
 853         rc = iwl3945_tx_reset(priv);
 854         if (rc)
 855                 goto error;
 856
 857         /* Tx queue(s) */
 858         for (txq_id = 0; txq_id < TFD_QUEUE_MAX; txq_id++) {
 859                 slots_num = (txq_id == IWL_CMD_QUEUE_NUM) ?
 860                                 TFD_CMD_SLOTS : TFD_TX_CMD_SLOTS;
 861                 rc = iwl_tx_queue_init(priv, &priv->txq[txq_id], slots_num,
 862                                 txq_id);
 863                 if (rc) {
 864                         IWL_ERROR("Tx %d queue init failed\n", txq_id);
 865                         goto error;
 866                 }
 867         }
 868
 869         return rc;
 870
 871  error:
 872         iwl_hw_txq_ctx_free(priv);
 873         return rc;
 874 }
 875
 876 int iwl_hw_nic_init(struct iwl_priv *priv)
 877 {
 878         u8 rev_id;
 879         int rc;
 880         unsigned long flags;
 881         struct iwl_rx_queue *rxq = &priv->rxq;
 882
 883         iwl_power_init_handle(priv);
 884
 885         spin_lock_irqsave(&priv->lock, flags);
 886         iwl_set_bit(priv, CSR_ANA_PLL_CFG, (1 << 24));
 887         iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
 888                     CSR_GIO_CHICKEN_BITS_REG_BIT_L1A_NO_L0S_RX);
 889
 890         iwl_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
 891         rc = iwl_poll_bit(priv, CSR_GP_CNTRL,
 892                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
 893                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
 894         if (rc < 0) {
 895                 spin_unlock_irqrestore(&priv->lock, flags);
 896                 IWL_DEBUG_INFO("Failed to init the card\n");
 897                 return rc;
 898         }
 899
 900         rc = iwl_grab_restricted_access(priv);
 901         if (rc) {
 902                 spin_unlock_irqrestore(&priv->lock, flags);
 903                 return rc;
 904         }
 905         iwl_write_restricted_reg(priv, APMG_CLK_EN_REG,
 906                                  APMG_CLK_VAL_DMA_CLK_RQT |
 907                                  APMG_CLK_VAL_BSM_CLK_RQT);
 908         udelay(20);
 909         iwl_set_bits_restricted_reg(priv, APMG_PCIDEV_STT_REG,
 910                                     APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
 911         iwl_release_restricted_access(priv);
 912         spin_unlock_irqrestore(&priv->lock, flags);
 913
 914         /* Determine HW type */
 915         rc = pci_read_config_byte(priv->pci_dev, PCI_REVISION_ID, &rev_id);
 916         if (rc)
 917                 return rc;
 918         IWL_DEBUG_INFO("HW Revision ID = 0x%X\n", rev_id);
 919
 920         iwl3945_nic_set_pwr_src(priv, 1);
 921         spin_lock_irqsave(&priv->lock, flags);
 922
 923         if (rev_id & PCI_CFG_REV_ID_BIT_RTP)
 924                 IWL_DEBUG_INFO("RTP type \n");
 925         else if (rev_id & PCI_CFG_REV_ID_BIT_BASIC_SKU) {
 926                 IWL_DEBUG_INFO("ALM-MB type\n");
 927                 iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
 928                             CSR_HW_IF_CONFIG_REG_BIT_ALMAGOR_MB);
 929         } else {
 930                 IWL_DEBUG_INFO("ALM-MM type\n");
 931                 iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
 932                             CSR_HW_IF_CONFIG_REG_BIT_ALMAGOR_MM);
 933         }
 934
 935         spin_unlock_irqrestore(&priv->lock, flags);
 936
 937         /* Initialize the EEPROM */
 938         rc = iwl_eeprom_init(priv);
 939         if (rc)
 940                 return rc;
 941
 942         spin_lock_irqsave(&priv->lock, flags);
 943         if (EEPROM_SKU_CAP_OP_MODE_MRC == priv->eeprom.sku_cap) {
 944                 IWL_DEBUG_INFO("SKU OP mode is mrc\n");
 945                 iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
 946                             CSR_HW_IF_CONFIG_REG_BIT_SKU_MRC);
 947         } else
 948                 IWL_DEBUG_INFO("SKU OP mode is basic\n");
 949
 950         if ((priv->eeprom.board_revision & 0xF0) == 0xD0) {
 951                 IWL_DEBUG_INFO("3945ABG revision is 0x%X\n",
 952                                priv->eeprom.board_revision);
 953                 iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
 954                             CSR_HW_IF_CONFIG_REG_BIT_BOARD_TYPE);
 955         } else {
 956                 IWL_DEBUG_INFO("3945ABG revision is 0x%X\n",
 957                                priv->eeprom.board_revision);
 958                 iwl_clear_bit(priv, CSR_HW_IF_CONFIG_REG,
 959                               CSR_HW_IF_CONFIG_REG_BIT_BOARD_TYPE);
 960         }
 961
 962         if (priv->eeprom.almgor_m_version <= 1) {
 963                 iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
 964                             CSR_HW_IF_CONFIG_REG_BITS_SILICON_TYPE_A);
 965                 IWL_DEBUG_INFO("Card M type A version is 0x%X\n",
 966                                priv->eeprom.almgor_m_version);
 967         } else {
 968                 IWL_DEBUG_INFO("Card M type B version is 0x%X\n",
 969                                priv->eeprom.almgor_m_version);
 970                 iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
 971                             CSR_HW_IF_CONFIG_REG_BITS_SILICON_TYPE_B);
 972         }
 973         spin_unlock_irqrestore(&priv->lock, flags);
 974
 975         if (priv->eeprom.sku_cap & EEPROM_SKU_CAP_SW_RF_KILL_ENABLE)
 976                 IWL_DEBUG_RF_KILL("SW RF KILL supported in EEPROM.\n");
 977
 978         if (priv->eeprom.sku_cap & EEPROM_SKU_CAP_HW_RF_KILL_ENABLE)
 979                 IWL_DEBUG_RF_KILL("HW RF KILL supported in EEPROM.\n");
 980
 981         /* Allocate the RX queue, or reset if it is already allocated */
 982         if (!rxq->bd) {
 983                 rc = iwl_rx_queue_alloc(priv);
 984                 if (rc) {
 985                         IWL_ERROR("Unable to initialize Rx queue\n");
 986                         return -ENOMEM;
 987                 }
 988         } else
 989                 iwl_rx_queue_reset(priv, rxq);
 990
 991         iwl_rx_replenish(priv);
 992
 993         iwl3945_rx_init(priv, rxq);
 994
 995         spin_lock_irqsave(&priv->lock, flags);
 996
 997         /* Look at using this instead:
 998         rxq->need_update = 1;
 999         iwl_rx_queue_update_write_ptr(priv, rxq);
1000         */
1001
1002         rc = iwl_grab_restricted_access(priv);
1003         if (rc) {
1004                 spin_unlock_irqrestore(&priv->lock, flags);
1005                 return rc;
1006         }
1007         iwl_write_restricted(priv, FH_RCSR_WPTR(0), rxq->write & ~7);
1008         iwl_release_restricted_access(priv);
1009
1010         spin_unlock_irqrestore(&priv->lock, flags);
1011
1012         rc = iwl3945_txq_ctx_reset(priv);
1013         if (rc)
1014                 return rc;
1015
1016         set_bit(STATUS_INIT, &priv->status);
1017
1018         return 0;
1019 }
1020
1021 /**
1022  * iwl_hw_txq_ctx_free - Free TXQ Context
1023  *
1024  * Destroy all TX DMA queues and structures
1025  */
1026 void iwl_hw_txq_ctx_free(struct iwl_priv *priv)
1027 {
1028         int txq_id;
1029
1030         /* Tx queues */
1031         for (txq_id = 0; txq_id < TFD_QUEUE_MAX; txq_id++)
1032                 iwl_tx_queue_free(priv, &priv->txq[txq_id]);
1033 }
1034
1035 void iwl_hw_txq_ctx_stop(struct iwl_priv *priv)
1036 {
1037         int queue;
1038         unsigned long flags;
1039
1040         spin_lock_irqsave(&priv->lock, flags);
1041         if (iwl_grab_restricted_access(priv)) {
1042                 spin_unlock_irqrestore(&priv->lock, flags);
1043                 iwl_hw_txq_ctx_free(priv);
1044                 return;
1045         }
1046
1047         /* stop SCD */
1048         iwl_write_restricted_reg(priv, SCD_MODE_REG, 0);
1049
1050         /* reset TFD queues */
1051         for (queue = TFD_QUEUE_MIN; queue < TFD_QUEUE_MAX; queue++) {
1052                 iwl_write_restricted(priv, FH_TCSR_CONFIG(queue), 0x0);
1053                 iwl_poll_restricted_bit(priv, FH_TSSR_TX_STATUS,
1054                                 ALM_FH_TSSR_TX_STATUS_REG_MSK_CHNL_IDLE(queue),
1055                                 1000);
1056         }
1057
1058         iwl_release_restricted_access(priv);
1059         spin_unlock_irqrestore(&priv->lock, flags);
1060
1061         iwl_hw_txq_ctx_free(priv);
1062 }
1063
1064 int iwl_hw_nic_stop_master(struct iwl_priv *priv)
1065 {
1066         int rc = 0;
1067         u32 reg_val;
1068         unsigned long flags;
1069
1070         spin_lock_irqsave(&priv->lock, flags);
1071
1072         /* set stop master bit */
1073         iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
1074
1075         reg_val = iwl_read32(priv, CSR_GP_CNTRL);
1076
1077         if (CSR_GP_CNTRL_REG_FLAG_MAC_POWER_SAVE ==
1078             (reg_val & CSR_GP_CNTRL_REG_MSK_POWER_SAVE_TYPE))
1079                 IWL_DEBUG_INFO("Card in power save, master is already "
1080                                "stopped\n");
1081         else {
1082                 rc = iwl_poll_bit(priv, CSR_RESET,
1083                                   CSR_RESET_REG_FLAG_MASTER_DISABLED,
1084                                   CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
1085                 if (rc < 0) {
1086                         spin_unlock_irqrestore(&priv->lock, flags);
1087                         return rc;
1088                 }
1089         }
1090
1091         spin_unlock_irqrestore(&priv->lock, flags);
1092         IWL_DEBUG_INFO("stop master\n");
1093
1094         return rc;
1095 }
1096
1097 int iwl_hw_nic_reset(struct iwl_priv *priv)
1098 {
1099         int rc;
1100         unsigned long flags;
1101
1102         iwl_hw_nic_stop_master(priv);
1103
1104         spin_lock_irqsave(&priv->lock, flags);
1105
1106         iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
1107
1108         rc = iwl_poll_bit(priv, CSR_GP_CNTRL,
1109                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
1110                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
1111
1112         rc = iwl_grab_restricted_access(priv);
1113         if (!rc) {
1114                 iwl_write_restricted_reg(priv, APMG_CLK_CTRL_REG,
1115                                          APMG_CLK_VAL_BSM_CLK_RQT);
1116
1117                 udelay(10);
1118
1119                 iwl_set_bit(priv, CSR_GP_CNTRL,
1120                             CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
1121
1122                 iwl_write_restricted_reg(priv, APMG_RTC_INT_MSK_REG, 0x0);
1123                 iwl_write_restricted_reg(priv, APMG_RTC_INT_STT_REG,
1124                                         0xFFFFFFFF);
1125
1126                 /* enable DMA */
1127                 iwl_write_restricted_reg(priv, APMG_CLK_EN_REG,
1128                                          APMG_CLK_VAL_DMA_CLK_RQT |
1129                                          APMG_CLK_VAL_BSM_CLK_RQT);
1130                 udelay(10);
1131
1132                 iwl_set_bits_restricted_reg(priv, APMG_PS_CTRL_REG,
1133                                 APMG_PS_CTRL_VAL_RESET_REQ);
1134                 udelay(5);
1135                 iwl_clear_bits_restricted_reg(priv, APMG_PS_CTRL_REG,
1136                                 APMG_PS_CTRL_VAL_RESET_REQ);
1137                 iwl_release_restricted_access(priv);
1138         }
1139
1140         /* Clear the 'host command active' bit... */
1141         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
1142
1143         wake_up_interruptible(&priv->wait_command_queue);
1144         spin_unlock_irqrestore(&priv->lock, flags);
1145
1146         return rc;
1147 }
1148
1149 /**
1150  * iwl_hw_reg_adjust_power_by_temp - return index delta into power gain settings table
1151  */
1152 static int iwl_hw_reg_adjust_power_by_temp(int new_reading, int old_reading)
1153 {
1154         return (new_reading - old_reading) * (-11) / 100;
1155 }
1156
1157 /**
1158  * iwl_hw_reg_temp_out_of_range - Keep temperature in sane range
1159  */
1160 static inline int iwl_hw_reg_temp_out_of_range(int temperature)
1161 {
1162         return (((temperature < -260) || (temperature > 25)) ? 1 : 0);
1163 }
1164
1165 int iwl_hw_get_temperature(struct iwl_priv *priv)
1166 {
1167         return iwl_read32(priv, CSR_UCODE_DRV_GP2);
1168 }
1169
1170 /**
1171  * iwl_hw_reg_txpower_get_temperature - get current temperature by reading from NIC
1172  */
1173 static int iwl_hw_reg_txpower_get_temperature(struct iwl_priv *priv)
1174 {
1175         int temperature;
1176
1177         temperature = iwl_hw_get_temperature(priv);
1178
1179         /* driver's okay range is -260 to +25.
1180          *   human readable okay range is 0 to +285 */
1181         IWL_DEBUG_INFO("Temperature: %d\n", temperature + IWL_TEMP_CONVERT);
1182
1183         /* handle insane temp reading */
1184         if (iwl_hw_reg_temp_out_of_range(temperature)) {
1185                 IWL_ERROR("Error bad temperature value  %d\n", temperature);
1186
1187                 /* if really really hot(?),
1188                  *   substitute the 3rd band/group's temp measured at factory */
1189                 if (priv->last_temperature > 100)
1190                         temperature = priv->eeprom.groups[2].temperature;
1191                 else /* else use most recent "sane" value from driver */
1192                         temperature = priv->last_temperature;
1193         }
1194
1195         return temperature;     /* raw, not "human readable" */
1196 }
1197
1198 /* Adjust Txpower only if temperature variance is greater than threshold.
1199  *
1200  * Both are lower than older versions' 9 degrees */
1201 #define IWL_TEMPERATURE_LIMIT_TIMER   6
1202
1203 /**
1204  * is_temp_calib_needed - determines if new calibration is needed
1205  *
1206  * records new temperature in tx_mgr->temperature.
1207  * replaces tx_mgr->last_temperature *only* if calib needed
1208  *    (assumes caller will actually do the calibration!). */
1209 static int is_temp_calib_needed(struct iwl_priv *priv)
1210 {
1211         int temp_diff;
1212
1213         priv->temperature = iwl_hw_reg_txpower_get_temperature(priv);
1214         temp_diff = priv->temperature - priv->last_temperature;
1215
1216         /* get absolute value */
1217         if (temp_diff < 0) {
1218                 IWL_DEBUG_POWER("Getting cooler, delta %d,\n", temp_diff);
1219                 temp_diff = -temp_diff;
1220         } else if (temp_diff == 0)
1221                 IWL_DEBUG_POWER("Same temp,\n");
1222         else
1223                 IWL_DEBUG_POWER("Getting warmer, delta %d,\n", temp_diff);
1224
1225         /* if we don't need calibration, *don't* update last_temperature */
1226         if (temp_diff < IWL_TEMPERATURE_LIMIT_TIMER) {
1227                 IWL_DEBUG_POWER("Timed thermal calib not needed\n");
1228                 return 0;
1229         }
1230
1231         IWL_DEBUG_POWER("Timed thermal calib needed\n");
1232
1233         /* assume that caller will actually do calib ...
1234          *   update the "last temperature" value */
1235         priv->last_temperature = priv->temperature;
1236         return 1;
1237 }
1238
1239 #define IWL_MAX_GAIN_ENTRIES 78
1240 #define IWL_CCK_FROM_OFDM_POWER_DIFF  -5
1241 #define IWL_CCK_FROM_OFDM_INDEX_DIFF (10)
1242
1243 /* radio and DSP power table, each step is 1/2 dB.
1244  * 1st number is for RF analog gain, 2nd number is for DSP pre-DAC gain. */
1245 static struct iwl_tx_power power_gain_table[2][IWL_MAX_GAIN_ENTRIES] = {
1246         {
1247          {251, 127},            /* 2.4 GHz, highest power */
1248          {251, 127},
1249          {251, 127},
1250          {251, 127},
1251          {251, 125},
1252          {251, 110},
1253          {251, 105},
1254          {251, 98},
1255          {187, 125},
1256          {187, 115},
1257          {187, 108},
1258          {187, 99},
1259          {243, 119},
1260          {243, 111},
1261          {243, 105},
1262          {243, 97},
1263          {243, 92},
1264          {211, 106},
1265          {211, 100},
1266          {179, 120},
1267          {179, 113},
1268          {179, 107},
1269          {147, 125},
1270          {147, 119},
1271          {147, 112},
1272          {147, 106},
1273          {147, 101},
1274          {147, 97},
1275          {147, 91},
1276          {115, 107},
1277          {235, 121},
1278          {235, 115},
1279          {235, 109},
1280          {203, 127},
1281          {203, 121},
1282          {203, 115},
1283          {203, 108},
1284          {203, 102},
1285          {203, 96},
1286          {203, 92},
1287          {171, 110},
1288          {171, 104},
1289          {171, 98},
1290          {139, 116},
1291          {227, 125},
1292          {227, 119},
1293          {227, 113},
1294          {227, 107},
1295          {227, 101},
1296          {227, 96},
1297          {195, 113},
1298          {195, 106},
1299          {195, 102},
1300          {195, 95},
1301          {163, 113},
1302          {163, 106},
1303          {163, 102},
1304          {163, 95},
1305          {131, 113},
1306          {131, 106},
1307          {131, 102},
1308          {131, 95},
1309          {99, 113},
1310          {99, 106},
1311          {99, 102},
1312          {99, 95},
1313          {67, 113},
1314          {67, 106},
1315          {67, 102},
1316          {67, 95},
1317          {35, 113},
1318          {35, 106},
1319          {35, 102},
1320          {35, 95},
1321          {3, 113},
1322          {3, 106},
1323          {3, 102},
1324          {3, 95} },             /* 2.4 GHz, lowest power */
1325         {
1326          {251, 127},            /* 5.x GHz, highest power */
1327          {251, 120},
1328          {251, 114},
1329          {219, 119},
1330          {219, 101},
1331          {187, 113},
1332          {187, 102},
1333          {155, 114},
1334          {155, 103},
1335          {123, 117},
1336          {123, 107},
1337          {123, 99},
1338          {123, 92},
1339          {91, 108},
1340          {59, 125},
1341          {59, 118},
1342          {59, 109},
1343          {59, 102},
1344          {59, 96},
1345          {59, 90},
1346          {27, 104},
1347          {27, 98},
1348          {27, 92},
1349          {115, 118},
1350          {115, 111},
1351          {115, 104},
1352          {83, 126},
1353          {83, 121},
1354          {83, 113},
1355          {83, 105},
1356          {83, 99},
1357          {51, 118},
1358          {51, 111},
1359          {51, 104},
1360          {51, 98},
1361          {19, 116},
1362          {19, 109},
1363          {19, 102},
1364          {19, 98},
1365          {19, 93},
1366          {171, 113},
1367          {171, 107},
1368          {171, 99},
1369          {139, 120},
1370          {139, 113},
1371          {139, 107},
1372          {139, 99},
1373          {107, 120},
1374          {107, 113},
1375          {107, 107},
1376          {107, 99},
1377          {75, 120},
1378          {75, 113},
1379          {75, 107},
1380          {75, 99},
1381          {43, 120},
1382          {43, 113},
1383          {43, 107},
1384          {43, 99},
1385          {11, 120},
1386          {11, 113},
1387          {11, 107},
1388          {11, 99},
1389          {131, 107},
1390          {131, 99},
1391          {99, 120},
1392          {99, 113},
1393          {99, 107},
1394          {99, 99},
1395          {67, 120},
1396          {67, 113},
1397          {67, 107},
1398          {67, 99},
1399          {35, 120},
1400          {35, 113},
1401          {35, 107},
1402          {35, 99},
1403          {3, 120} }             /* 5.x GHz, lowest power */
1404 };
1405
1406 static inline u8 iwl_hw_reg_fix_power_index(int index)
1407 {
1408         if (index < 0)
1409                 return 0;
1410         if (index >= IWL_MAX_GAIN_ENTRIES)
1411                 return IWL_MAX_GAIN_ENTRIES - 1;
1412         return (u8) index;
1413 }
1414
1415 /* Kick off thermal recalibration check every 60 seconds */
1416 #define REG_RECALIB_PERIOD (60)
1417
1418 /**
1419  * iwl_hw_reg_set_scan_power - Set Tx power for scan probe requests
1420  *
1421  * Set (in our channel info database) the direct scan Tx power for 1 Mbit (CCK)
1422  * or 6 Mbit (OFDM) rates.
1423  */
1424 static void iwl_hw_reg_set_scan_power(struct iwl_priv *priv, u32 scan_tbl_index,
1425                                s32 rate_index, const s8 *clip_pwrs,
1426                                struct iwl_channel_info *ch_info,
1427                                int band_index)
1428 {
1429         struct iwl_scan_power_info *scan_power_info;
1430         s8 power;
1431         u8 power_index;
1432
1433         scan_power_info = &ch_info->scan_pwr_info[scan_tbl_index];
1434
1435         /* use this channel group's 6Mbit clipping/saturation pwr,
1436          *   but cap at regulatory scan power restriction (set during init
1437          *   based on eeprom channel data) for this channel.  */
1438         power = min(ch_info->scan_power, clip_pwrs[IWL_RATE_6M_INDEX_TABLE]);
1439
1440         /* further limit to user's max power preference.
1441          * FIXME:  Other spectrum management power limitations do not
1442          *   seem to apply?? */
1443         power = min(power, priv->user_txpower_limit);
1444         scan_power_info->requested_power = power;
1445
1446         /* find difference between new scan *power* and current "normal"
1447          *   Tx *power* for 6Mb.  Use this difference (x2) to adjust the
1448          *   current "normal" temperature-compensated Tx power *index* for
1449          *   this rate (1Mb or 6Mb) to yield new temp-compensated scan power
1450          *   *index*. */
1451         power_index = ch_info->power_info[rate_index].power_table_index
1452             - (power - ch_info->power_info
1453                [IWL_RATE_6M_INDEX_TABLE].requested_power) * 2;
1454
1455         /* store reference index that we use when adjusting *all* scan
1456          *   powers.  So we can accommodate user (all channel) or spectrum
1457          *   management (single channel) power changes "between" temperature
1458          *   feedback compensation procedures.
1459          * don't force fit this reference index into gain table; it may be a
1460          *   negative number.  This will help avoid errors when we're at
1461          *   the lower bounds (highest gains, for warmest temperatures)
1462          *   of the table. */
1463
1464         /* don't exceed table bounds for "real" setting */
1465         power_index = iwl_hw_reg_fix_power_index(power_index);
1466
1467         scan_power_info->power_table_index = power_index;
1468         scan_power_info->tpc.tx_gain =
1469             power_gain_table[band_index][power_index].tx_gain;
1470         scan_power_info->tpc.dsp_atten =
1471             power_gain_table[band_index][power_index].dsp_atten;
1472 }
1473
1474 /**
1475  * iwl_hw_reg_send_txpower - fill in Tx Power command with gain settings
1476  *
1477  * Configures power settings for all rates for the current channel,
1478  * using values from channel info struct, and send to NIC
1479  */
1480 int iwl_hw_reg_send_txpower(struct iwl_priv *priv)
1481 {
1482         int rate_idx, i;
1483         const struct iwl_channel_info *ch_info = NULL;
1484         struct iwl_txpowertable_cmd txpower = {
1485                 .channel = priv->active_rxon.channel,
1486         };
1487
1488         txpower.band = (priv->phymode == MODE_IEEE80211A) ? 0 : 1;
1489         ch_info = iwl_get_channel_info(priv,
1490                                        priv->phymode,
1491                                        le16_to_cpu(priv->active_rxon.channel));
1492         if (!ch_info) {
1493                 IWL_ERROR
1494                     ("Failed to get channel info for channel %d [%d]\n",
1495                      le16_to_cpu(priv->active_rxon.channel), priv->phymode);
1496                 return -EINVAL;
1497         }
1498
1499         if (!is_channel_valid(ch_info)) {
1500                 IWL_DEBUG_POWER("Not calling TX_PWR_TABLE_CMD on "
1501                                 "non-Tx channel.\n");
1502                 return 0;
1503         }
1504
1505         /* fill cmd with power settings for all rates for current channel */
1506         /* Fill OFDM rate */
1507         for (rate_idx = IWL_FIRST_OFDM_RATE, i = 0;
1508              rate_idx <= IWL_LAST_OFDM_RATE; rate_idx++, i++) {
1509
1510                 txpower.power[i].tpc = ch_info->power_info[i].tpc;
1511                 txpower.power[i].rate = iwl_rates[rate_idx].plcp;
1512
1513                 IWL_DEBUG_POWER("ch %d:%d rf %d dsp %3d rate code 0x%02x\n",
1514                                 le16_to_cpu(txpower.channel),
1515                                 txpower.band,
1516                                 txpower.power[i].tpc.tx_gain,
1517                                 txpower.power[i].tpc.dsp_atten,
1518                                 txpower.power[i].rate);
1519         }
1520         /* Fill CCK rates */
1521         for (rate_idx = IWL_FIRST_CCK_RATE;
1522              rate_idx <= IWL_LAST_CCK_RATE; rate_idx++, i++) {
1523                 txpower.power[i].tpc = ch_info->power_info[i].tpc;
1524                 txpower.power[i].rate = iwl_rates[rate_idx].plcp;
1525
1526                 IWL_DEBUG_POWER("ch %d:%d rf %d dsp %3d rate code 0x%02x\n",
1527                                 le16_to_cpu(txpower.channel),
1528                                 txpower.band,
1529                                 txpower.power[i].tpc.tx_gain,
1530                                 txpower.power[i].tpc.dsp_atten,
1531                                 txpower.power[i].rate);
1532         }
1533
1534         return iwl_send_cmd_pdu(priv, REPLY_TX_PWR_TABLE_CMD,
1535                         sizeof(struct iwl_txpowertable_cmd), &txpower);
1536
1537 }
1538
1539 /**
1540  * iwl_hw_reg_set_new_power - Configures power tables at new levels
1541  * @ch_info: Channel to update.  Uses power_info.requested_power.
1542  *
1543  * Replace requested_power and base_power_index ch_info fields for
1544  * one channel.
1545  *
1546  * Called if user or spectrum management changes power preferences.
1547  * Takes into account h/w and modulation limitations (clip power).
1548  *
1549  * This does *not* send anything to NIC, just sets up ch_info for one channel.
1550  *
1551  * NOTE: reg_compensate_for_temperature_dif() *must* be run after this to
1552  *       properly fill out the scan powers, and actual h/w gain settings,
1553  *       and send changes to NIC
1554  */
1555 static int iwl_hw_reg_set_new_power(struct iwl_priv *priv,
1556                              struct iwl_channel_info *ch_info)
1557 {
1558         struct iwl_channel_power_info *power_info;
1559         int power_changed = 0;
1560         int i;
1561         const s8 *clip_pwrs;
1562         int power;
1563
1564         /* Get this chnlgrp's rate-to-max/clip-powers table */
1565         clip_pwrs = priv->clip_groups[ch_info->group_index].clip_powers;
1566
1567         /* Get this channel's rate-to-current-power settings table */
1568         power_info = ch_info->power_info;
1569
1570         /* update OFDM Txpower settings */
1571         for (i = IWL_RATE_6M_INDEX_TABLE; i <= IWL_RATE_54M_INDEX_TABLE;
1572              i++, ++power_info) {
1573                 int delta_idx;
1574
1575                 /* limit new power to be no more than h/w capability */
1576                 power = min(ch_info->curr_txpow, clip_pwrs[i]);
1577                 if (power == power_info->requested_power)
1578                         continue;
1579
1580                 /* find difference between old and new requested powers,
1581                  *    update base (non-temp-compensated) power index */
1582                 delta_idx = (power - power_info->requested_power) * 2;
1583                 power_info->base_power_index -= delta_idx;
1584
1585                 /* save new requested power value */
1586                 power_info->requested_power = power;
1587
1588                 power_changed = 1;
1589         }
1590
1591         /* update CCK Txpower settings, based on OFDM 12M setting ...
1592          *    ... all CCK power settings for a given channel are the *same*. */
1593         if (power_changed) {
1594                 power =
1595                     ch_info->power_info[IWL_RATE_12M_INDEX_TABLE].
1596                     requested_power + IWL_CCK_FROM_OFDM_POWER_DIFF;
1597
1598                 /* do all CCK rates' iwl_channel_power_info structures */
1599                 for (i = IWL_RATE_1M_INDEX_TABLE; i <= IWL_RATE_11M_INDEX_TABLE; i++) {
1600                         power_info->requested_power = power;
1601                         power_info->base_power_index =
1602                             ch_info->power_info[IWL_RATE_12M_INDEX_TABLE].
1603                             base_power_index + IWL_CCK_FROM_OFDM_INDEX_DIFF;
1604                         ++power_info;
1605                 }
1606         }
1607
1608         return 0;
1609 }
1610
1611 /**
1612  * iwl_hw_reg_get_ch_txpower_limit - returns new power limit for channel
1613  *
1614  * NOTE: Returned power limit may be less (but not more) than requested,
1615  *       based strictly on regulatory (eeprom and spectrum mgt) limitations
1616  *       (no consideration for h/w clipping limitations).
1617  */
1618 static int iwl_hw_reg_get_ch_txpower_limit(struct iwl_channel_info *ch_info)
1619 {
1620         s8 max_power;
1621
1622 #if 0
1623         /* if we're using TGd limits, use lower of TGd or EEPROM */
1624         if (ch_info->tgd_data.max_power != 0)
1625                 max_power = min(ch_info->tgd_data.max_power,
1626                                 ch_info->eeprom.max_power_avg);
1627
1628         /* else just use EEPROM limits */
1629         else
1630 #endif
1631                 max_power = ch_info->eeprom.max_power_avg;
1632
1633         return min(max_power, ch_info->max_power_avg);
1634 }
1635
1636 /**
1637  * iwl_hw_reg_comp_txpower_temp - Compensate for temperature
1638  *
1639  * Compensate txpower settings of *all* channels for temperature.
1640  * This only accounts for the difference between current temperature
1641  *   and the factory calibration temperatures, and bases the new settings
1642  *   on the channel's base_power_index.
1643  *
1644  * If RxOn is "associated", this sends the new Txpower to NIC!
1645  */
1646 static int iwl_hw_reg_comp_txpower_temp(struct iwl_priv *priv)
1647 {
1648         struct iwl_channel_info *ch_info = NULL;
1649         int delta_index;
1650         const s8 *clip_pwrs; /* array of h/w max power levels for each rate */
1651         u8 a_band;
1652         u8 rate_index;
1653         u8 scan_tbl_index;
1654         u8 i;
1655         int ref_temp;
1656         int temperature = priv->temperature;
1657
1658         /* set up new Tx power info for each and every channel, 2.4 and 5.x */
1659         for (i = 0; i < priv->channel_count; i++) {
1660                 ch_info = &priv->channel_info[i];
1661                 a_band = is_channel_a_band(ch_info);
1662
1663                 /* Get this chnlgrp's factory calibration temperature */
1664                 ref_temp = (s16)priv->eeprom.groups[ch_info->group_index].
1665                     temperature;
1666
1667                 /* get power index adjustment based on curr and factory
1668                  * temps */
1669                 delta_index = iwl_hw_reg_adjust_power_by_temp(temperature,
1670                                                               ref_temp);
1671
1672                 /* set tx power value for all rates, OFDM and CCK */
1673                 for (rate_index = 0; rate_index < IWL_RATE_COUNT;
1674                      rate_index++) {
1675                         int power_idx =
1676                             ch_info->power_info[rate_index].base_power_index;
1677
1678                         /* temperature compensate */
1679                         power_idx += delta_index;
1680
1681                         /* stay within table range */
1682                         power_idx = iwl_hw_reg_fix_power_index(power_idx);
1683                         ch_info->power_info[rate_index].
1684                             power_table_index = (u8) power_idx;
1685                         ch_info->power_info[rate_index].tpc =
1686                             power_gain_table[a_band][power_idx];
1687                 }
1688
1689                 /* Get this chnlgrp's rate-to-max/clip-powers table */
1690                 clip_pwrs = priv->clip_groups[ch_info->group_index].clip_powers;
1691
1692                 /* set scan tx power, 1Mbit for CCK, 6Mbit for OFDM */
1693                 for (scan_tbl_index = 0;
1694                      scan_tbl_index < IWL_NUM_SCAN_RATES; scan_tbl_index++) {
1695                         s32 actual_index = (scan_tbl_index == 0) ?
1696                             IWL_RATE_1M_INDEX_TABLE : IWL_RATE_6M_INDEX_TABLE;
1697                         iwl_hw_reg_set_scan_power(priv, scan_tbl_index,
1698                                            actual_index, clip_pwrs,
1699                                            ch_info, a_band);
1700                 }
1701         }
1702
1703         /* send Txpower command for current channel to ucode */
1704         return iwl_hw_reg_send_txpower(priv);
1705 }
1706
1707 int iwl_hw_reg_set_txpower(struct iwl_priv *priv, s8 power)
1708 {
1709         struct iwl_channel_info *ch_info;
1710         s8 max_power;
1711         u8 a_band;
1712         u8 i;
1713
1714         if (priv->user_txpower_limit == power) {
1715                 IWL_DEBUG_POWER("Requested Tx power same as current "
1716                                 "limit: %ddBm.\n", power);
1717                 return 0;
1718         }
1719
1720         IWL_DEBUG_POWER("Setting upper limit clamp to %ddBm.\n", power);
1721         priv->user_txpower_limit = power;
1722
1723         /* set up new Tx powers for each and every channel, 2.4 and 5.x */
1724
1725         for (i = 0; i < priv->channel_count; i++) {
1726                 ch_info = &priv->channel_info[i];
1727                 a_band = is_channel_a_band(ch_info);
1728
1729                 /* find minimum power of all user and regulatory constraints
1730                  *    (does not consider h/w clipping limitations) */
1731                 max_power = iwl_hw_reg_get_ch_txpower_limit(ch_info);
1732                 max_power = min(power, max_power);
1733                 if (max_power != ch_info->curr_txpow) {
1734                         ch_info->curr_txpow = max_power;
1735
1736                         /* this considers the h/w clipping limitations */
1737                         iwl_hw_reg_set_new_power(priv, ch_info);
1738                 }
1739         }
1740
1741         /* update txpower settings for all channels,
1742          *   send to NIC if associated. */
1743         is_temp_calib_needed(priv);
1744         iwl_hw_reg_comp_txpower_temp(priv);
1745
1746         return 0;
1747 }
1748
1749 /* will add 3945 channel switch cmd handling later */
1750 int iwl_hw_channel_switch(struct iwl_priv *priv, u16 channel)
1751 {
1752         return 0;
1753 }
1754
1755 /**
1756  * iwl3945_reg_txpower_periodic -  called when time to check our temperature.
1757  *
1758  * -- reset periodic timer
1759  * -- see if temp has changed enough to warrant re-calibration ... if so:
1760  *     -- correct coeffs for temp (can reset temp timer)
1761  *     -- save this temp as "last",
1762  *     -- send new set of gain settings to NIC
1763  * NOTE:  This should continue working, even when we're not associated,
1764  *   so we can keep our internal table of scan powers current. */
1765 void iwl3945_reg_txpower_periodic(struct iwl_priv *priv)
1766 {
1767         /* This will kick in the "brute force"
1768          * iwl_hw_reg_comp_txpower_temp() below */
1769         if (!is_temp_calib_needed(priv))
1770                 goto reschedule;
1771
1772         /* Set up a new set of temp-adjusted TxPowers, send to NIC.
1773          * This is based *only* on current temperature,
1774          * ignoring any previous power measurements */
1775         iwl_hw_reg_comp_txpower_temp(priv);
1776
1777  reschedule:
1778         queue_delayed_work(priv->workqueue,
1779                            &priv->thermal_periodic, REG_RECALIB_PERIOD * HZ);
1780 }
1781
1782 void iwl3945_bg_reg_txpower_periodic(struct work_struct *work)
1783 {
1784         struct iwl_priv *priv = container_of(work, struct iwl_priv,
1785                                              thermal_periodic.work);
1786
1787         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1788                 return;
1789
1790         mutex_lock(&priv->mutex);
1791         iwl3945_reg_txpower_periodic(priv);
1792         mutex_unlock(&priv->mutex);
1793 }
1794
1795 /**
1796  * iwl_hw_reg_get_ch_grp_index - find the channel-group index (0-4)
1797  *                                 for the channel.
1798  *
1799  * This function is used when initializing channel-info structs.
1800  *
1801  * NOTE: These channel groups do *NOT* match the bands above!
1802  *       These channel groups are based on factory-tested channels;
1803  *       on A-band, EEPROM's "group frequency" entries represent the top
1804  *       channel in each group 1-4.  Group 5 All B/G channels are in group 0.
1805  */
1806 static u16 iwl_hw_reg_get_ch_grp_index(struct iwl_priv *priv,
1807                                        const struct iwl_channel_info *ch_info)
1808 {
1809         struct iwl_eeprom_txpower_group *ch_grp = &priv->eeprom.groups[0];
1810         u8 group;
1811         u16 group_index = 0;    /* based on factory calib frequencies */
1812         u8 grp_channel;
1813
1814         /* Find the group index for the channel ... don't use index 1(?) */
1815         if (is_channel_a_band(ch_info)) {
1816                 for (group = 1; group < 5; group++) {
1817                         grp_channel = ch_grp[group].group_channel;
1818                         if (ch_info->channel <= grp_channel) {
1819                                 group_index = group;
1820                                 break;
1821                         }
1822                 }
1823                 /* group 4 has a few channels *above* its factory cal freq */
1824                 if (group == 5)
1825                         group_index = 4;
1826         } else
1827                 group_index = 0;        /* 2.4 GHz, group 0 */
1828
1829         IWL_DEBUG_POWER("Chnl %d mapped to grp %d\n", ch_info->channel,
1830                         group_index);
1831         return group_index;
1832 }
1833
1834 /**
1835  * iwl_hw_reg_get_matched_power_index - Interpolate to get nominal index
1836  *
1837  * Interpolate to get nominal (i.e. at factory calibration temperature) index
1838  *   into radio/DSP gain settings table for requested power.
1839  */
1840 static int iwl_hw_reg_get_matched_power_index(struct iwl_priv *priv,
1841                                        s8 requested_power,
1842                                        s32 setting_index, s32 *new_index)
1843 {
1844         const struct iwl_eeprom_txpower_group *chnl_grp = NULL;
1845         s32 index0, index1;
1846         s32 power = 2 * requested_power;
1847         s32 i;
1848         const struct iwl_eeprom_txpower_sample *samples;
1849         s32 gains0, gains1;
1850         s32 res;
1851         s32 denominator;
1852
1853         chnl_grp = &priv->eeprom.groups[setting_index];
1854         samples = chnl_grp->samples;
1855         for (i = 0; i < 5; i++) {
1856                 if (power == samples[i].power) {
1857                         *new_index = samples[i].gain_index;
1858                         return 0;
1859                 }
1860         }
1861
1862         if (power > samples[1].power) {
1863                 index0 = 0;
1864                 index1 = 1;
1865         } else if (power > samples[2].power) {
1866                 index0 = 1;
1867                 index1 = 2;
1868         } else if (power > samples[3].power) {
1869                 index0 = 2;
1870                 index1 = 3;
1871         } else {
1872                 index0 = 3;
1873                 index1 = 4;
1874         }
1875
1876         denominator = (s32) samples[index1].power - (s32) samples[index0].power;
1877         if (denominator == 0)
1878                 return -EINVAL;
1879         gains0 = (s32) samples[index0].gain_index * (1 << 19);
1880         gains1 = (s32) samples[index1].gain_index * (1 << 19);
1881         res = gains0 + (gains1 - gains0) *
1882             ((s32) power - (s32) samples[index0].power) / denominator +
1883             (1 << 18);
1884         *new_index = res >> 19;
1885         return 0;
1886 }
1887
1888 static void iwl_hw_reg_init_channel_groups(struct iwl_priv *priv)
1889 {
1890         u32 i;
1891         s32 rate_index;
1892         const struct iwl_eeprom_txpower_group *group;
1893
1894         IWL_DEBUG_POWER("Initializing factory calib info from EEPROM\n");
1895
1896         for (i = 0; i < IWL_NUM_TX_CALIB_GROUPS; i++) {
1897                 s8 *clip_pwrs;  /* table of power levels for each rate */
1898                 s8 satur_pwr;   /* saturation power for each chnl group */
1899                 group = &priv->eeprom.groups[i];
1900
1901                 /* sanity check on factory saturation power value */
1902                 if (group->saturation_power < 40) {
1903                         IWL_WARNING("Error: saturation power is %d, "
1904                                     "less than minimum expected 40\n",
1905                                     group->saturation_power);
1906                         return;
1907                 }
1908
1909                 /*
1910                  * Derive requested power levels for each rate, based on
1911                  *   hardware capabilities (saturation power for band).
1912                  * Basic value is 3dB down from saturation, with further
1913                  *   power reductions for highest 3 data rates.  These
1914                  *   backoffs provide headroom for high rate modulation
1915                  *   power peaks, without too much distortion (clipping).
1916                  */
1917                 /* we'll fill in this array with h/w max power levels */
1918                 clip_pwrs = (s8 *) priv->clip_groups[i].clip_powers;
1919
1920                 /* divide factory saturation power by 2 to find -3dB level */
1921                 satur_pwr = (s8) (group->saturation_power >> 1);
1922
1923                 /* fill in channel group's nominal powers for each rate */
1924                 for (rate_index = 0;
1925                      rate_index < IWL_RATE_COUNT; rate_index++, clip_pwrs++) {
1926                         switch (rate_index) {
1927                         case IWL_RATE_36M_INDEX_TABLE:
1928                                 if (i == 0)     /* B/G */
1929                                         *clip_pwrs = satur_pwr;
1930                                 else    /* A */
1931                                         *clip_pwrs = satur_pwr - 5;
1932                                 break;
1933                         case IWL_RATE_48M_INDEX_TABLE:
1934                                 if (i == 0)
1935                                         *clip_pwrs = satur_pwr - 7;
1936                                 else
1937                                         *clip_pwrs = satur_pwr - 10;
1938                                 break;
1939                         case IWL_RATE_54M_INDEX_TABLE:
1940                                 if (i == 0)
1941                                         *clip_pwrs = satur_pwr - 9;
1942                                 else
1943                                         *clip_pwrs = satur_pwr - 12;
1944                                 break;
1945                         default:
1946                                 *clip_pwrs = satur_pwr;
1947                                 break;
1948                         }
1949                 }
1950         }
1951 }
1952
1953 /**
1954  * iwl3945_txpower_set_from_eeprom - Set channel power info based on EEPROM
1955  *
1956  * Second pass (during init) to set up priv->channel_info
1957  *
1958  * Set up Tx-power settings in our channel info database for each VALID
1959  * (for this geo/SKU) channel, at all Tx data rates, based on eeprom values
1960  * and current temperature.
1961  *
1962  * Since this is based on current temperature (at init time), these values may
1963  * not be valid for very long, but it gives us a starting/default point,
1964  * and allows us to active (i.e. using Tx) scan.
1965  *
1966  * This does *not* write values to NIC, just sets up our internal table.
1967  */
1968 int iwl3945_txpower_set_from_eeprom(struct iwl_priv *priv)
1969 {
1970         struct iwl_channel_info *ch_info = NULL;
1971         struct iwl_channel_power_info *pwr_info;
1972         int delta_index;
1973         u8 rate_index;
1974         u8 scan_tbl_index;
1975         const s8 *clip_pwrs;    /* array of power levels for each rate */
1976         u8 gain, dsp_atten;
1977         s8 power;
1978         u8 pwr_index, base_pwr_index, a_band;
1979         u8 i;
1980         int temperature;
1981
1982         /* save temperature reference,
1983          *   so we can determine next time to calibrate */
1984         temperature = iwl_hw_reg_txpower_get_temperature(priv);
1985         priv->last_temperature = temperature;
1986
1987         iwl_hw_reg_init_channel_groups(priv);
1988
1989         /* initialize Tx power info for each and every channel, 2.4 and 5.x */
1990         for (i = 0, ch_info = priv->channel_info; i < priv->channel_count;
1991              i++, ch_info++) {
1992                 a_band = is_channel_a_band(ch_info);
1993                 if (!is_channel_valid(ch_info))
1994                         continue;
1995
1996                 /* find this channel's channel group (*not* "band") index */
1997                 ch_info->group_index =
1998                         iwl_hw_reg_get_ch_grp_index(priv, ch_info);
1999
2000                 /* Get this chnlgrp's rate->max/clip-powers table */
2001                 clip_pwrs = priv->clip_groups[ch_info->group_index].clip_powers;
2002
2003                 /* calculate power index *adjustment* value according to
2004                  *  diff between current temperature and factory temperature */
2005                 delta_index = iwl_hw_reg_adjust_power_by_temp(temperature,
2006                                 priv->eeprom.groups[ch_info->group_index].
2007                                 temperature);
2008
2009                 IWL_DEBUG_POWER("Delta index for channel %d: %d [%d]\n",
2010                                 ch_info->channel, delta_index, temperature +
2011                                 IWL_TEMP_CONVERT);
2012
2013                 /* set tx power value for all OFDM rates */
2014                 for (rate_index = 0; rate_index < IWL_OFDM_RATES;
2015                      rate_index++) {
2016                         s32 power_idx;
2017                         int rc;
2018
2019                         /* use channel group's clip-power table,
2020                          *   but don't exceed channel's max power */
2021                         s8 pwr = min(ch_info->max_power_avg,
2022                                      clip_pwrs[rate_index]);
2023
2024                         pwr_info = &ch_info->power_info[rate_index];
2025
2026                         /* get base (i.e. at factory-measured temperature)
2027                          *    power table index for this rate's power */
2028                         rc = iwl_hw_reg_get_matched_power_index(priv, pwr,
2029                                                          ch_info->group_index,
2030                                                          &power_idx);
2031                         if (rc) {
2032                                 IWL_ERROR("Invalid power index\n");
2033                                 return rc;
2034                         }
2035                         pwr_info->base_power_index = (u8) power_idx;
2036
2037                         /* temperature compensate */
2038                         power_idx += delta_index;
2039
2040                         /* stay within range of gain table */
2041                         power_idx = iwl_hw_reg_fix_power_index(power_idx);
2042
2043                         /* fill 1 OFDM rate's iwl_channel_power_info struct */
2044                         pwr_info->requested_power = pwr;
2045                         pwr_info->power_table_index = (u8) power_idx;
2046                         pwr_info->tpc.tx_gain =
2047                             power_gain_table[a_band][power_idx].tx_gain;
2048                         pwr_info->tpc.dsp_atten =
2049                             power_gain_table[a_band][power_idx].dsp_atten;
2050                 }
2051
2052                 /* set tx power for CCK rates, based on OFDM 12 Mbit settings*/
2053                 pwr_info = &ch_info->power_info[IWL_RATE_12M_INDEX_TABLE];
2054                 power = pwr_info->requested_power +
2055                         IWL_CCK_FROM_OFDM_POWER_DIFF;
2056                 pwr_index = pwr_info->power_table_index +
2057                         IWL_CCK_FROM_OFDM_INDEX_DIFF;
2058                 base_pwr_index = pwr_info->base_power_index +
2059                         IWL_CCK_FROM_OFDM_INDEX_DIFF;
2060
2061                 /* stay within table range */
2062                 pwr_index = iwl_hw_reg_fix_power_index(pwr_index);
2063                 gain = power_gain_table[a_band][pwr_index].tx_gain;
2064                 dsp_atten = power_gain_table[a_band][pwr_index].dsp_atten;
2065
2066                 /* fill each CCK rate's iwl_channel_power_info structure
2067                  * NOTE:  All CCK-rate Txpwrs are the same for a given chnl!
2068                  * NOTE:  CCK rates start at end of OFDM rates! */
2069                 for (rate_index = 0;
2070                      rate_index < IWL_CCK_RATES; rate_index++) {
2071                         pwr_info = &ch_info->power_info[rate_index+IWL_OFDM_RATES];
2072                         pwr_info->requested_power = power;
2073                         pwr_info->power_table_index = pwr_index;
2074                         pwr_info->base_power_index = base_pwr_index;
2075                         pwr_info->tpc.tx_gain = gain;
2076                         pwr_info->tpc.dsp_atten = dsp_atten;
2077                 }
2078
2079                 /* set scan tx power, 1Mbit for CCK, 6Mbit for OFDM */
2080                 for (scan_tbl_index = 0;
2081                      scan_tbl_index < IWL_NUM_SCAN_RATES; scan_tbl_index++) {
2082                         s32 actual_index = (scan_tbl_index == 0) ?
2083                                 IWL_RATE_1M_INDEX_TABLE : IWL_RATE_6M_INDEX_TABLE;
2084                         iwl_hw_reg_set_scan_power(priv, scan_tbl_index,
2085                                 actual_index, clip_pwrs, ch_info, a_band);
2086                 }
2087         }
2088
2089         return 0;
2090 }
2091
2092 int iwl_hw_rxq_stop(struct iwl_priv *priv)
2093 {
2094         int rc;
2095         unsigned long flags;
2096
2097         spin_lock_irqsave(&priv->lock, flags);
2098         rc = iwl_grab_restricted_access(priv);
2099         if (rc) {
2100                 spin_unlock_irqrestore(&priv->lock, flags);
2101                 return rc;
2102         }
2103
2104         iwl_write_restricted(priv, FH_RCSR_CONFIG(0), 0);
2105         rc = iwl_poll_restricted_bit(priv, FH_RSSR_STATUS, (1 << 24), 1000);
2106         if (rc < 0)
2107                 IWL_ERROR("Can't stop Rx DMA.\n");
2108
2109         iwl_release_restricted_access(priv);
2110         spin_unlock_irqrestore(&priv->lock, flags);
2111
2112         return 0;
2113 }
2114
2115 int iwl_hw_tx_queue_init(struct iwl_priv *priv, struct iwl_tx_queue *txq)
2116 {
2117         int rc;
2118         unsigned long flags;
2119         int txq_id = txq->q.id;
2120
2121         struct iwl_shared *shared_data = priv->hw_setting.shared_virt;
2122
2123         shared_data->tx_base_ptr[txq_id] = cpu_to_le32((u32)txq->q.dma_addr);
2124
2125         spin_lock_irqsave(&priv->lock, flags);
2126         rc = iwl_grab_restricted_access(priv);
2127         if (rc) {
2128                 spin_unlock_irqrestore(&priv->lock, flags);
2129                 return rc;
2130         }
2131         iwl_write_restricted(priv, FH_CBCC_CTRL(txq_id), 0);
2132         iwl_write_restricted(priv, FH_CBCC_BASE(txq_id), 0);
2133
2134         iwl_write_restricted(priv, FH_TCSR_CONFIG(txq_id),
2135                 ALM_FH_TCSR_TX_CONFIG_REG_VAL_CIRQ_RTC_NOINT |
2136                 ALM_FH_TCSR_TX_CONFIG_REG_VAL_MSG_MODE_TXF |
2137                 ALM_FH_TCSR_TX_CONFIG_REG_VAL_CIRQ_HOST_IFTFD |
2138                 ALM_FH_TCSR_TX_CONFIG_REG_VAL_DMA_CREDIT_ENABLE_VAL |
2139                 ALM_FH_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_ENABLE);
2140         iwl_release_restricted_access(priv);
2141
2142         /* fake read to flush all prev. writes */
2143         iwl_read32(priv, FH_TSSR_CBB_BASE);
2144         spin_unlock_irqrestore(&priv->lock, flags);
2145
2146         return 0;
2147 }
2148
2149 int iwl_hw_get_rx_read(struct iwl_priv *priv)
2150 {
2151         struct iwl_shared *shared_data = priv->hw_setting.shared_virt;
2152
2153         return le32_to_cpu(shared_data->rx_read_ptr[0]);
2154 }
2155
2156 /**
2157  * iwl3945_init_hw_rate_table - Initialize the hardware rate fallback table
2158  */
2159 int iwl3945_init_hw_rate_table(struct iwl_priv *priv)
2160 {
2161         int rc, i, index, prev_index;
2162         struct iwl_rate_scaling_cmd rate_cmd = {
2163                 .reserved = {0, 0, 0},
2164         };
2165         struct iwl_rate_scaling_info *table = rate_cmd.table;
2166
2167         for (i = 0; i < ARRAY_SIZE(iwl_rates); i++) {
2168                 index = iwl_rates[i].table_rs_index;
2169
2170                 table[index].rate_n_flags =
2171                         iwl_hw_set_rate_n_flags(iwl_rates[i].plcp, 0);
2172                 table[index].try_cnt = priv->retry_rate;
2173                 prev_index = iwl_get_prev_ieee_rate(i);
2174                 table[index].next_rate_index = iwl_rates[prev_index].table_rs_index;
2175         }
2176
2177         switch (priv->phymode) {
2178         case MODE_IEEE80211A:
2179                 IWL_DEBUG_RATE("Select A mode rate scale\n");
2180                 /* If one of the following CCK rates is used,
2181                  * have it fall back to the 6M OFDM rate */
2182                 for (i = IWL_RATE_1M_INDEX_TABLE; i <= IWL_RATE_11M_INDEX_TABLE; i++)
2183                         table[i].next_rate_index = iwl_rates[IWL_FIRST_OFDM_RATE].table_rs_index;
2184
2185                 /* Don't fall back to CCK rates */
2186                 table[IWL_RATE_12M_INDEX_TABLE].next_rate_index = IWL_RATE_9M_INDEX_TABLE;
2187
2188                 /* Don't drop out of OFDM rates */
2189                 table[IWL_RATE_6M_INDEX_TABLE].next_rate_index =
2190                     iwl_rates[IWL_FIRST_OFDM_RATE].table_rs_index;
2191                 break;
2192
2193         case MODE_IEEE80211B:
2194                 IWL_DEBUG_RATE("Select B mode rate scale\n");
2195                 /* If an OFDM rate is used, have it fall back to the
2196                  * 1M CCK rates */
2197                 for (i = IWL_RATE_6M_INDEX_TABLE; i <= IWL_RATE_54M_INDEX_TABLE; i++)
2198                         table[i].next_rate_index = iwl_rates[IWL_FIRST_CCK_RATE].table_rs_index;
2199
2200                 /* CCK shouldn't fall back to OFDM... */
2201                 table[IWL_RATE_11M_INDEX_TABLE].next_rate_index = IWL_RATE_5M_INDEX_TABLE;
2202                 break;
2203
2204         default:
2205                 IWL_DEBUG_RATE("Select G mode rate scale\n");
2206                 break;
2207         }
2208
2209         /* Update the rate scaling for control frame Tx */
2210         rate_cmd.table_id = 0;
2211         rc = iwl_send_cmd_pdu(priv, REPLY_RATE_SCALE, sizeof(rate_cmd),
2212                               &rate_cmd);
2213         if (rc)
2214                 return rc;
2215
2216         /* Update the rate scaling for data frame Tx */
2217         rate_cmd.table_id = 1;
2218         return iwl_send_cmd_pdu(priv, REPLY_RATE_SCALE, sizeof(rate_cmd),
2219                                 &rate_cmd);
2220 }
2221
2222 int iwl_hw_set_hw_setting(struct iwl_priv *priv)
2223 {
2224         memset((void *)&priv->hw_setting, 0,
2225                sizeof(struct iwl_driver_hw_info));
2226
2227         priv->hw_setting.shared_virt =
2228             pci_alloc_consistent(priv->pci_dev,
2229                                  sizeof(struct iwl_shared),
2230                                  &priv->hw_setting.shared_phys);
2231
2232         if (!priv->hw_setting.shared_virt) {
2233                 IWL_ERROR("failed to allocate pci memory\n");
2234                 mutex_unlock(&priv->mutex);
2235                 return -ENOMEM;
2236         }
2237
2238         priv->hw_setting.ac_queue_count = AC_NUM;
2239         priv->hw_setting.rx_buffer_size = IWL_RX_BUF_SIZE;
2240         priv->hw_setting.tx_cmd_len = sizeof(struct iwl_tx_cmd);
2241         priv->hw_setting.max_rxq_size = RX_QUEUE_SIZE;
2242         priv->hw_setting.max_rxq_log = RX_QUEUE_SIZE_LOG;
2243         priv->hw_setting.cck_flag = 0;
2244         priv->hw_setting.max_stations = IWL3945_STATION_COUNT;
2245         priv->hw_setting.bcast_sta_id = IWL3945_BROADCAST_ID;
2246         return 0;
2247 }
2248
2249 unsigned int iwl_hw_get_beacon_cmd(struct iwl_priv *priv,
2250                           struct iwl_frame *frame, u8 rate)
2251 {
2252         struct iwl_tx_beacon_cmd *tx_beacon_cmd;
2253         unsigned int frame_size;
2254
2255         tx_beacon_cmd = (struct iwl_tx_beacon_cmd *)&frame->u;
2256         memset(tx_beacon_cmd, 0, sizeof(*tx_beacon_cmd));
2257
2258         tx_beacon_cmd->tx.sta_id = IWL3945_BROADCAST_ID;
2259         tx_beacon_cmd->tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2260
2261         frame_size = iwl_fill_beacon_frame(priv,
2262                                 tx_beacon_cmd->frame,
2263                                 BROADCAST_ADDR,
2264                                 sizeof(frame->u) - sizeof(*tx_beacon_cmd));
2265
2266         BUG_ON(frame_size > MAX_MPDU_SIZE);
2267         tx_beacon_cmd->tx.len = cpu_to_le16((u16)frame_size);
2268
2269         tx_beacon_cmd->tx.rate = rate;
2270         tx_beacon_cmd->tx.tx_flags = (TX_CMD_FLG_SEQ_CTL_MSK |
2271                                       TX_CMD_FLG_TSF_MSK);
2272
2273         /* supp_rates[0] == OFDM start at IWL_FIRST_OFDM_RATE*/
2274         tx_beacon_cmd->tx.supp_rates[0] =
2275                 (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
2276
2277         tx_beacon_cmd->tx.supp_rates[1] =
2278                 (IWL_CCK_BASIC_RATES_MASK & 0xF);
2279
2280         return (sizeof(struct iwl_tx_beacon_cmd) + frame_size);
2281 }
2282
2283 void iwl_hw_rx_handler_setup(struct iwl_priv *priv)
2284 {
2285         priv->rx_handlers[REPLY_3945_RX] = iwl3945_rx_reply_rx;
2286 }
2287
2288 void iwl_hw_setup_deferred_work(struct iwl_priv *priv)
2289 {
2290         INIT_DELAYED_WORK(&priv->thermal_periodic,
2291                           iwl3945_bg_reg_txpower_periodic);
2292 }
2293
2294 void iwl_hw_cancel_deferred_work(struct iwl_priv *priv)
2295 {
2296         cancel_delayed_work(&priv->thermal_periodic);
2297 }
2298
2299 struct pci_device_id iwl_hw_card_ids[] = {
2300         {0x8086, 0x4222, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
2301         {0x8086, 0x4227, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
2302         {0}
2303 };
2304
2305 inline int iwl_eeprom_aqcuire_semaphore(struct iwl_priv *priv)
2306 {
2307         _iwl_clear_bit(priv, CSR_EEPROM_GP, CSR_EEPROM_GP_IF_OWNER_MSK);
2308         return 0;
2309 }
2310
2311 MODULE_DEVICE_TABLE(pci, iwl_hw_card_ids);