git.oblomov.eu Git - linux-2.6/blob - 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 #include "iwl-3945.h"
  43 #include "iwl-helpers.h"
  44 #include "iwl-3945-rs.h"
  45
  46 #define IWL_DECLARE_RATE_INFO(r, ip, in, rp, rn, pp, np)    \
  47         [IWL_RATE_##r##M_INDEX] = { IWL_RATE_##r##M_PLCP,   \
  48                                     IWL_RATE_##r##M_IEEE,   \
  49                                     IWL_RATE_##ip##M_INDEX, \
  50                                     IWL_RATE_##in##M_INDEX, \
  51                                     IWL_RATE_##rp##M_INDEX, \
  52                                     IWL_RATE_##rn##M_INDEX, \
  53                                     IWL_RATE_##pp##M_INDEX, \
  54                                     IWL_RATE_##np##M_INDEX, \
  55                                     IWL_RATE_##r##M_INDEX_TABLE, \
  56                                     IWL_RATE_##ip##M_INDEX_TABLE }
  57
  58 /*
  59  * Parameter order:
  60  *   rate, prev rate, next rate, prev tgg rate, next tgg rate
  61  *
  62  * If there isn't a valid next or previous rate then INV is used which
  63  * maps to IWL_RATE_INVALID
  64  *
  65  */
  66 const struct iwl3945_rate_info iwl3945_rates[IWL_RATE_COUNT] = {
  67         IWL_DECLARE_RATE_INFO(1, INV, 2, INV, 2, INV, 2),    /*  1mbps */
  68         IWL_DECLARE_RATE_INFO(2, 1, 5, 1, 5, 1, 5),          /*  2mbps */
  69         IWL_DECLARE_RATE_INFO(5, 2, 6, 2, 11, 2, 11),        /*5.5mbps */
  70         IWL_DECLARE_RATE_INFO(11, 9, 12, 5, 12, 5, 18),      /* 11mbps */
  71         IWL_DECLARE_RATE_INFO(6, 5, 9, 5, 11, 5, 11),        /*  6mbps */
  72         IWL_DECLARE_RATE_INFO(9, 6, 11, 5, 11, 5, 11),       /*  9mbps */
  73         IWL_DECLARE_RATE_INFO(12, 11, 18, 11, 18, 11, 18),   /* 12mbps */
  74         IWL_DECLARE_RATE_INFO(18, 12, 24, 12, 24, 11, 24),   /* 18mbps */
  75         IWL_DECLARE_RATE_INFO(24, 18, 36, 18, 36, 18, 36),   /* 24mbps */
  76         IWL_DECLARE_RATE_INFO(36, 24, 48, 24, 48, 24, 48),   /* 36mbps */
  77         IWL_DECLARE_RATE_INFO(48, 36, 54, 36, 54, 36, 54),   /* 48mbps */
  78         IWL_DECLARE_RATE_INFO(54, 48, INV, 48, INV, 48, INV),/* 54mbps */
  79 };
  80
  81 /* 1 = enable the iwl3945_disable_events() function */
  82 #define IWL_EVT_DISABLE (0)
  83 #define IWL_EVT_DISABLE_SIZE (1532/32)
  84
  85 /**
  86  * iwl3945_disable_events - Disable selected events in uCode event log
  87  *
  88  * Disable an event by writing "1"s into "disable"
  89  *   bitmap in SRAM.  Bit position corresponds to Event # (id/type).
  90  *   Default values of 0 enable uCode events to be logged.
  91  * Use for only special debugging.  This function is just a placeholder as-is,
  92  *   you'll need to provide the special bits! ...
  93  *   ... and set IWL_EVT_DISABLE to 1. */
  94 void iwl3945_disable_events(struct iwl3945_priv *priv)
  95 {
  96         int ret;
  97         int i;
  98         u32 base;               /* SRAM address of event log header */
  99         u32 disable_ptr;        /* SRAM address of event-disable bitmap array */
 100         u32 array_size;         /* # of u32 entries in array */
 101         u32 evt_disable[IWL_EVT_DISABLE_SIZE] = {
 102                 0x00000000,     /*   31 -    0  Event id numbers */
 103                 0x00000000,     /*   63 -   32 */
 104                 0x00000000,     /*   95 -   64 */
 105                 0x00000000,     /*  127 -   96 */
 106                 0x00000000,     /*  159 -  128 */
 107                 0x00000000,     /*  191 -  160 */
 108                 0x00000000,     /*  223 -  192 */
 109                 0x00000000,     /*  255 -  224 */
 110                 0x00000000,     /*  287 -  256 */
 111                 0x00000000,     /*  319 -  288 */
 112                 0x00000000,     /*  351 -  320 */
 113                 0x00000000,     /*  383 -  352 */
 114                 0x00000000,     /*  415 -  384 */
 115                 0x00000000,     /*  447 -  416 */
 116                 0x00000000,     /*  479 -  448 */
 117                 0x00000000,     /*  511 -  480 */
 118                 0x00000000,     /*  543 -  512 */
 119                 0x00000000,     /*  575 -  544 */
 120                 0x00000000,     /*  607 -  576 */
 121                 0x00000000,     /*  639 -  608 */
 122                 0x00000000,     /*  671 -  640 */
 123                 0x00000000,     /*  703 -  672 */
 124                 0x00000000,     /*  735 -  704 */
 125                 0x00000000,     /*  767 -  736 */
 126                 0x00000000,     /*  799 -  768 */
 127                 0x00000000,     /*  831 -  800 */
 128                 0x00000000,     /*  863 -  832 */
 129                 0x00000000,     /*  895 -  864 */
 130                 0x00000000,     /*  927 -  896 */
 131                 0x00000000,     /*  959 -  928 */
 132                 0x00000000,     /*  991 -  960 */
 133                 0x00000000,     /* 1023 -  992 */
 134                 0x00000000,     /* 1055 - 1024 */
 135                 0x00000000,     /* 1087 - 1056 */
 136                 0x00000000,     /* 1119 - 1088 */
 137                 0x00000000,     /* 1151 - 1120 */
 138                 0x00000000,     /* 1183 - 1152 */
 139                 0x00000000,     /* 1215 - 1184 */
 140                 0x00000000,     /* 1247 - 1216 */
 141                 0x00000000,     /* 1279 - 1248 */
 142                 0x00000000,     /* 1311 - 1280 */
 143                 0x00000000,     /* 1343 - 1312 */
 144                 0x00000000,     /* 1375 - 1344 */
 145                 0x00000000,     /* 1407 - 1376 */
 146                 0x00000000,     /* 1439 - 1408 */
 147                 0x00000000,     /* 1471 - 1440 */
 148                 0x00000000,     /* 1503 - 1472 */
 149         };
 150
 151         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
 152         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
 153                 IWL_ERROR("Invalid event log pointer 0x%08X\n", base);
 154                 return;
 155         }
 156
 157         ret = iwl3945_grab_nic_access(priv);
 158         if (ret) {
 159                 IWL_WARNING("Can not read from adapter at this time.\n");
 160                 return;
 161         }
 162
 163         disable_ptr = iwl3945_read_targ_mem(priv, base + (4 * sizeof(u32)));
 164         array_size = iwl3945_read_targ_mem(priv, base + (5 * sizeof(u32)));
 165         iwl3945_release_nic_access(priv);
 166
 167         if (IWL_EVT_DISABLE && (array_size == IWL_EVT_DISABLE_SIZE)) {
 168                 IWL_DEBUG_INFO("Disabling selected uCode log events at 0x%x\n",
 169                                disable_ptr);
 170                 ret = iwl3945_grab_nic_access(priv);
 171                 for (i = 0; i < IWL_EVT_DISABLE_SIZE; i++)
 172                         iwl3945_write_targ_mem(priv,
 173                                            disable_ptr + (i * sizeof(u32)),
 174                                            evt_disable[i]);
 175
 176                 iwl3945_release_nic_access(priv);
 177         } else {
 178                 IWL_DEBUG_INFO("Selected uCode log events may be disabled\n");
 179                 IWL_DEBUG_INFO("  by writing \"1\"s into disable bitmap\n");
 180                 IWL_DEBUG_INFO("  in SRAM at 0x%x, size %d u32s\n",
 181                                disable_ptr, array_size);
 182         }
 183
 184 }
 185
 186 /**
 187  * iwl3945_get_antenna_flags - Get antenna flags for RXON command
 188  * @priv: eeprom and antenna fields are used to determine antenna flags
 189  *
 190  * priv->eeprom  is used to determine if antenna AUX/MAIN are reversed
 191  * priv->antenna specifies the antenna diversity mode:
 192  *
 193  * IWL_ANTENNA_DIVERISTY - NIC selects best antenna by itself
 194  * IWL_ANTENNA_MAIN      - Force MAIN antenna
 195  * IWL_ANTENNA_AUX       - Force AUX antenna
 196  */
 197 __le32 iwl3945_get_antenna_flags(const struct iwl3945_priv *priv)
 198 {
 199         switch (priv->antenna) {
 200         case IWL_ANTENNA_DIVERSITY:
 201                 return 0;
 202
 203         case IWL_ANTENNA_MAIN:
 204                 if (priv->eeprom.antenna_switch_type)
 205                         return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_B_MSK;
 206                 return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_A_MSK;
 207
 208         case IWL_ANTENNA_AUX:
 209                 if (priv->eeprom.antenna_switch_type)
 210                         return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_A_MSK;
 211                 return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_B_MSK;
 212         }
 213
 214         /* bad antenna selector value */
 215         IWL_ERROR("Bad antenna selector value (0x%x)\n", priv->antenna);
 216         return 0;               /* "diversity" is default if error */
 217 }
 218
 219 /*****************************************************************************
 220  *
 221  * Intel PRO/Wireless 3945ABG/BG Network Connection
 222  *
 223  *  RX handler implementations
 224  *
 225  *  Used by iwl-base.c
 226  *
 227  *****************************************************************************/
 228
 229 void iwl3945_hw_rx_statistics(struct iwl3945_priv *priv, struct iwl3945_rx_mem_buffer *rxb)
 230 {
 231         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
 232         IWL_DEBUG_RX("Statistics notification received (%d vs %d).\n",
 233                      (int)sizeof(struct iwl3945_notif_statistics),
 234                      le32_to_cpu(pkt->len));
 235
 236         memcpy(&priv->statistics, pkt->u.raw, sizeof(priv->statistics));
 237
 238         priv->last_statistics_time = jiffies;
 239 }
 240
 241 static void iwl3945_handle_data_packet(struct iwl3945_priv *priv, int is_data,
 242                                    struct iwl3945_rx_mem_buffer *rxb,
 243                                    struct ieee80211_rx_status *stats,
 244                                    u16 phy_flags)
 245 {
 246         struct ieee80211_hdr *hdr;
 247         struct iwl3945_rx_packet *pkt = (struct iwl3945_rx_packet *)rxb->skb->data;
 248         struct iwl3945_rx_frame_hdr *rx_hdr = IWL_RX_HDR(pkt);
 249         struct iwl3945_rx_frame_end *rx_end = IWL_RX_END(pkt);
 250         short len = le16_to_cpu(rx_hdr->len);
 251
 252         /* We received data from the HW, so stop the watchdog */
 253         if (unlikely((len + IWL_RX_FRAME_SIZE) > skb_tailroom(rxb->skb))) {
 254                 IWL_DEBUG_DROP("Corruption detected!\n");
 255                 return;
 256         }
 257
 258         /* We only process data packets if the interface is open */
 259         if (unlikely(!priv->is_open)) {
 260                 IWL_DEBUG_DROP_LIMIT
 261                     ("Dropping packet while interface is not open.\n");
 262                 return;
 263         }
 264         if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR) {
 265                 if (iwl3945_param_hwcrypto)
 266                         iwl3945_set_decrypted_flag(priv, rxb->skb,
 267                                                le32_to_cpu(rx_end->status),
 268                                                stats);
 269                 iwl3945_handle_data_packet_monitor(priv, rxb, IWL_RX_DATA(pkt),
 270                                                len, stats, phy_flags);
 271                 return;
 272         }
 273
 274         skb_reserve(rxb->skb, (void *)rx_hdr->payload - (void *)pkt);
 275         /* Set the size of the skb to the size of the frame */
 276         skb_put(rxb->skb, le16_to_cpu(rx_hdr->len));
 277
 278         hdr = (void *)rxb->skb->data;
 279
 280         if (iwl3945_param_hwcrypto)
 281                 iwl3945_set_decrypted_flag(priv, rxb->skb,
 282                                        le32_to_cpu(rx_end->status), stats);
 283
 284         ieee80211_rx_irqsafe(priv->hw, rxb->skb, stats);
 285         rxb->skb = NULL;
 286 }
 287
 288 static void iwl3945_rx_reply_rx(struct iwl3945_priv *priv,
 289                                 struct iwl3945_rx_mem_buffer *rxb)
 290 {
 291         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
 292         struct iwl3945_rx_frame_stats *rx_stats = IWL_RX_STATS(pkt);
 293         struct iwl3945_rx_frame_hdr *rx_hdr = IWL_RX_HDR(pkt);
 294         struct iwl3945_rx_frame_end *rx_end = IWL_RX_END(pkt);
 295         struct ieee80211_hdr *header;
 296         u16 phy_flags = le16_to_cpu(rx_hdr->phy_flags);
 297         u16 rx_stats_sig_avg = le16_to_cpu(rx_stats->sig_avg);
 298         u16 rx_stats_noise_diff = le16_to_cpu(rx_stats->noise_diff);
 299         struct ieee80211_rx_status stats = {
 300                 .mactime = le64_to_cpu(rx_end->timestamp),
 301                 .freq = ieee80211chan2mhz(le16_to_cpu(rx_hdr->channel)),
 302                 .channel = le16_to_cpu(rx_hdr->channel),
 303                 .phymode = (rx_hdr->phy_flags & RX_RES_PHY_FLAGS_BAND_24_MSK) ?
 304                 MODE_IEEE80211G : MODE_IEEE80211A,
 305                 .antenna = 0,
 306                 .rate = rx_hdr->rate,
 307                 .flag = 0,
 308         };
 309         u8 network_packet;
 310         int snr;
 311
 312         if ((unlikely(rx_stats->phy_count > 20))) {
 313                 IWL_DEBUG_DROP
 314                     ("dsp size out of range [0,20]: "
 315                      "%d/n", rx_stats->phy_count);
 316                 return;
 317         }
 318
 319         if (!(rx_end->status & RX_RES_STATUS_NO_CRC32_ERROR)
 320             || !(rx_end->status & RX_RES_STATUS_NO_RXE_OVERFLOW)) {
 321                 IWL_DEBUG_RX("Bad CRC or FIFO: 0x%08X.\n", rx_end->status);
 322                 return;
 323         }
 324
 325         if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR) {
 326                 iwl3945_handle_data_packet(priv, 1, rxb, &stats, phy_flags);
 327                 return;
 328         }
 329
 330         /* Convert 3945's rssi indicator to dBm */
 331         stats.ssi = rx_stats->rssi - IWL_RSSI_OFFSET;
 332
 333         /* Set default noise value to -127 */
 334         if (priv->last_rx_noise == 0)
 335                 priv->last_rx_noise = IWL_NOISE_MEAS_NOT_AVAILABLE;
 336
 337         /* 3945 provides noise info for OFDM frames only.
 338          * sig_avg and noise_diff are measured by the 3945's digital signal
 339          *   processor (DSP), and indicate linear levels of signal level and
 340          *   distortion/noise within the packet preamble after
 341          *   automatic gain control (AGC).  sig_avg should stay fairly
 342          *   constant if the radio's AGC is working well.
 343          * Since these values are linear (not dB or dBm), linear
 344          *   signal-to-noise ratio (SNR) is (sig_avg / noise_diff).
 345          * Convert linear SNR to dB SNR, then subtract that from rssi dBm
 346          *   to obtain noise level in dBm.
 347          * Calculate stats.signal (quality indicator in %) based on SNR. */
 348         if (rx_stats_noise_diff) {
 349                 snr = rx_stats_sig_avg / rx_stats_noise_diff;
 350                 stats.noise = stats.ssi - iwl3945_calc_db_from_ratio(snr);
 351                 stats.signal = iwl3945_calc_sig_qual(stats.ssi, stats.noise);
 352
 353         /* If noise info not available, calculate signal quality indicator (%)
 354          *   using just the dBm signal level. */
 355         } else {
 356                 stats.noise = priv->last_rx_noise;
 357                 stats.signal = iwl3945_calc_sig_qual(stats.ssi, 0);
 358         }
 359
 360
 361         IWL_DEBUG_STATS("Rssi %d noise %d qual %d sig_avg %d noise_diff %d\n",
 362                         stats.ssi, stats.noise, stats.signal,
 363                         rx_stats_sig_avg, rx_stats_noise_diff);
 364
 365         stats.freq = ieee80211chan2mhz(stats.channel);
 366
 367         /* can be covered by iwl3945_report_frame() in most cases */
 368 /*      IWL_DEBUG_RX("RX status: 0x%08X\n", rx_end->status); */
 369
 370         header = (struct ieee80211_hdr *)IWL_RX_DATA(pkt);
 371
 372         network_packet = iwl3945_is_network_packet(priv, header);
 373
 374 #ifdef CONFIG_IWL3945_DEBUG
 375         if (iwl3945_debug_level & IWL_DL_STATS && net_ratelimit())
 376                 IWL_DEBUG_STATS
 377                     ("[%c] %d RSSI: %d Signal: %u, Noise: %u, Rate: %u\n",
 378                      network_packet ? '*' : ' ',
 379                      stats.channel, stats.ssi, stats.ssi,
 380                      stats.ssi, stats.rate);
 381
 382         if (iwl3945_debug_level & (IWL_DL_RX))
 383                 /* Set "1" to report good data frames in groups of 100 */
 384                 iwl3945_report_frame(priv, pkt, header, 1);
 385 #endif
 386
 387         if (network_packet) {
 388                 priv->last_beacon_time = le32_to_cpu(rx_end->beacon_timestamp);
 389                 priv->last_tsf = le64_to_cpu(rx_end->timestamp);
 390                 priv->last_rx_rssi = stats.ssi;
 391                 priv->last_rx_noise = stats.noise;
 392         }
 393
 394         switch (le16_to_cpu(header->frame_control) & IEEE80211_FCTL_FTYPE) {
 395         case IEEE80211_FTYPE_MGMT:
 396                 switch (le16_to_cpu(header->frame_control) &
 397                         IEEE80211_FCTL_STYPE) {
 398                 case IEEE80211_STYPE_PROBE_RESP:
 399                 case IEEE80211_STYPE_BEACON:{
 400                                 /* If this is a beacon or probe response for
 401                                  * our network then cache the beacon
 402                                  * timestamp */
 403                                 if ((((priv->iw_mode == IEEE80211_IF_TYPE_STA)
 404                                       && !compare_ether_addr(header->addr2,
 405                                                              priv->bssid)) ||
 406                                      ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
 407                                       && !compare_ether_addr(header->addr3,
 408                                                              priv->bssid)))) {
 409                                         struct ieee80211_mgmt *mgmt =
 410                                             (struct ieee80211_mgmt *)header;
 411                                         __le32 *pos;
 412                                         pos =
 413                                             (__le32 *) & mgmt->u.beacon.
 414                                             timestamp;
 415                                         priv->timestamp0 = le32_to_cpu(pos[0]);
 416                                         priv->timestamp1 = le32_to_cpu(pos[1]);
 417                                         priv->beacon_int = le16_to_cpu(
 418                                             mgmt->u.beacon.beacon_int);
 419                                         if (priv->call_post_assoc_from_beacon &&
 420                                             (priv->iw_mode ==
 421                                                 IEEE80211_IF_TYPE_STA))
 422                                                 queue_work(priv->workqueue,
 423                                                     &priv->post_associate.work);
 424
 425                                         priv->call_post_assoc_from_beacon = 0;
 426                                 }
 427
 428                                 break;
 429                         }
 430
 431                 case IEEE80211_STYPE_ACTION:
 432                         /* TODO: Parse 802.11h frames for CSA... */
 433                         break;
 434
 435                         /*
 436                          * TODO: There is no callback function from upper
 437                          * stack to inform us when associated status. this
 438                          * work around to sniff assoc_resp management frame
 439                          * and finish the association process.
 440                          */
 441                 case IEEE80211_STYPE_ASSOC_RESP:
 442                 case IEEE80211_STYPE_REASSOC_RESP:{
 443                                 struct ieee80211_mgmt *mgnt =
 444                                     (struct ieee80211_mgmt *)header;
 445                                 priv->assoc_id = (~((1 << 15) | (1 << 14)) &
 446                                                   le16_to_cpu(mgnt->u.
 447                                                               assoc_resp.aid));
 448                                 priv->assoc_capability =
 449                                     le16_to_cpu(mgnt->u.assoc_resp.capab_info);
 450                                 if (priv->beacon_int)
 451                                         queue_work(priv->workqueue,
 452                                             &priv->post_associate.work);
 453                                 else
 454                                         priv->call_post_assoc_from_beacon = 1;
 455                                 break;
 456                         }
 457
 458                 case IEEE80211_STYPE_PROBE_REQ:{
 459                                 DECLARE_MAC_BUF(mac1);
 460                                 DECLARE_MAC_BUF(mac2);
 461                                 DECLARE_MAC_BUF(mac3);
 462                                 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
 463                                         IWL_DEBUG_DROP
 464                                             ("Dropping (non network): %s"
 465                                              ", %s, %s\n",
 466                                              print_mac(mac1, header->addr1),
 467                                              print_mac(mac2, header->addr2),
 468                                              print_mac(mac3, header->addr3));
 469                                 return;
 470                         }
 471                 }
 472
 473                 iwl3945_handle_data_packet(priv, 0, rxb, &stats, phy_flags);
 474                 break;
 475
 476         case IEEE80211_FTYPE_CTL:
 477                 break;
 478
 479         case IEEE80211_FTYPE_DATA: {
 480                 DECLARE_MAC_BUF(mac1);
 481                 DECLARE_MAC_BUF(mac2);
 482                 DECLARE_MAC_BUF(mac3);
 483
 484                 if (unlikely(iwl3945_is_duplicate_packet(priv, header)))
 485                         IWL_DEBUG_DROP("Dropping (dup): %s, %s, %s\n",
 486                                        print_mac(mac1, header->addr1),
 487                                        print_mac(mac2, header->addr2),
 488                                        print_mac(mac3, header->addr3));
 489                 else
 490                         iwl3945_handle_data_packet(priv, 1, rxb, &stats,
 491                                                    phy_flags);
 492                 break;
 493         }
 494         }
 495 }
 496
 497 int iwl3945_hw_txq_attach_buf_to_tfd(struct iwl3945_priv *priv, void *ptr,
 498                                  dma_addr_t addr, u16 len)
 499 {
 500         int count;
 501         u32 pad;
 502         struct iwl3945_tfd_frame *tfd = (struct iwl3945_tfd_frame *)ptr;
 503
 504         count = TFD_CTL_COUNT_GET(le32_to_cpu(tfd->control_flags));
 505         pad = TFD_CTL_PAD_GET(le32_to_cpu(tfd->control_flags));
 506
 507         if ((count >= NUM_TFD_CHUNKS) || (count < 0)) {
 508                 IWL_ERROR("Error can not send more than %d chunks\n",
 509                           NUM_TFD_CHUNKS);
 510                 return -EINVAL;
 511         }
 512
 513         tfd->pa[count].addr = cpu_to_le32(addr);
 514         tfd->pa[count].len = cpu_to_le32(len);
 515
 516         count++;
 517
 518         tfd->control_flags = cpu_to_le32(TFD_CTL_COUNT_SET(count) |
 519                                          TFD_CTL_PAD_SET(pad));
 520
 521         return 0;
 522 }
 523
 524 /**
 525  * iwl3945_hw_txq_free_tfd - Free one TFD, those at index [txq->q.read_ptr]
 526  *
 527  * Does NOT advance any indexes
 528  */
 529 int iwl3945_hw_txq_free_tfd(struct iwl3945_priv *priv, struct iwl3945_tx_queue *txq)
 530 {
 531         struct iwl3945_tfd_frame *bd_tmp = (struct iwl3945_tfd_frame *)&txq->bd[0];
 532         struct iwl3945_tfd_frame *bd = &bd_tmp[txq->q.read_ptr];
 533         struct pci_dev *dev = priv->pci_dev;
 534         int i;
 535         int counter;
 536
 537         /* classify bd */
 538         if (txq->q.id == IWL_CMD_QUEUE_NUM)
 539                 /* nothing to cleanup after for host commands */
 540                 return 0;
 541
 542         /* sanity check */
 543         counter = TFD_CTL_COUNT_GET(le32_to_cpu(bd->control_flags));
 544         if (counter > NUM_TFD_CHUNKS) {
 545                 IWL_ERROR("Too many chunks: %i\n", counter);
 546                 /* @todo issue fatal error, it is quite serious situation */
 547                 return 0;
 548         }
 549
 550         /* unmap chunks if any */
 551
 552         for (i = 1; i < counter; i++) {
 553                 pci_unmap_single(dev, le32_to_cpu(bd->pa[i].addr),
 554                                  le32_to_cpu(bd->pa[i].len), PCI_DMA_TODEVICE);
 555                 if (txq->txb[txq->q.read_ptr].skb[0]) {
 556                         struct sk_buff *skb = txq->txb[txq->q.read_ptr].skb[0];
 557                         if (txq->txb[txq->q.read_ptr].skb[0]) {
 558                                 /* Can be called from interrupt context */
 559                                 dev_kfree_skb_any(skb);
 560                                 txq->txb[txq->q.read_ptr].skb[0] = NULL;
 561                         }
 562                 }
 563         }
 564         return 0;
 565 }
 566
 567 u8 iwl3945_hw_find_station(struct iwl3945_priv *priv, const u8 *addr)
 568 {
 569         int i;
 570         int ret = IWL_INVALID_STATION;
 571         unsigned long flags;
 572         DECLARE_MAC_BUF(mac);
 573
 574         spin_lock_irqsave(&priv->sta_lock, flags);
 575         for (i = IWL_STA_ID; i < priv->hw_setting.max_stations; i++)
 576                 if ((priv->stations[i].used) &&
 577                     (!compare_ether_addr
 578                      (priv->stations[i].sta.sta.addr, addr))) {
 579                         ret = i;
 580                         goto out;
 581                 }
 582
 583         IWL_DEBUG_INFO("can not find STA %s (total %d)\n",
 584                        print_mac(mac, addr), priv->num_stations);
 585  out:
 586         spin_unlock_irqrestore(&priv->sta_lock, flags);
 587         return ret;
 588 }
 589
 590 /**
 591  * iwl3945_hw_build_tx_cmd_rate - Add rate portion to TX_CMD:
 592  *
 593 */
 594 void iwl3945_hw_build_tx_cmd_rate(struct iwl3945_priv *priv,
 595                               struct iwl3945_cmd *cmd,
 596                               struct ieee80211_tx_control *ctrl,
 597                               struct ieee80211_hdr *hdr, int sta_id, int tx_id)
 598 {
 599         unsigned long flags;
 600         u16 rate_index = min(ctrl->tx_rate & 0xffff, IWL_RATE_COUNT - 1);
 601         u16 rate_mask;
 602         int rate;
 603         u8 rts_retry_limit;
 604         u8 data_retry_limit;
 605         __le32 tx_flags;
 606         u16 fc = le16_to_cpu(hdr->frame_control);
 607
 608         rate = iwl3945_rates[rate_index].plcp;
 609         tx_flags = cmd->cmd.tx.tx_flags;
 610
 611         /* We need to figure out how to get the sta->supp_rates while
 612          * in this running context; perhaps encoding into ctrl->tx_rate? */
 613         rate_mask = IWL_RATES_MASK;
 614
 615         spin_lock_irqsave(&priv->sta_lock, flags);
 616
 617         priv->stations[sta_id].current_rate.rate_n_flags = rate;
 618
 619         if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) &&
 620             (sta_id != IWL3945_BROADCAST_ID) &&
 621                 (sta_id != IWL_MULTICAST_ID))
 622                 priv->stations[IWL_STA_ID].current_rate.rate_n_flags = rate;
 623
 624         spin_unlock_irqrestore(&priv->sta_lock, flags);
 625
 626         if (tx_id >= IWL_CMD_QUEUE_NUM)
 627                 rts_retry_limit = 3;
 628         else
 629                 rts_retry_limit = 7;
 630
 631         if (ieee80211_is_probe_response(fc)) {
 632                 data_retry_limit = 3;
 633                 if (data_retry_limit < rts_retry_limit)
 634                         rts_retry_limit = data_retry_limit;
 635         } else
 636                 data_retry_limit = IWL_DEFAULT_TX_RETRY;
 637
 638         if (priv->data_retry_limit != -1)
 639                 data_retry_limit = priv->data_retry_limit;
 640
 641         if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
 642                 switch (fc & IEEE80211_FCTL_STYPE) {
 643                 case IEEE80211_STYPE_AUTH:
 644                 case IEEE80211_STYPE_DEAUTH:
 645                 case IEEE80211_STYPE_ASSOC_REQ:
 646                 case IEEE80211_STYPE_REASSOC_REQ:
 647                         if (tx_flags & TX_CMD_FLG_RTS_MSK) {
 648                                 tx_flags &= ~TX_CMD_FLG_RTS_MSK;
 649                                 tx_flags |= TX_CMD_FLG_CTS_MSK;
 650                         }
 651                         break;
 652                 default:
 653                         break;
 654                 }
 655         }
 656
 657         cmd->cmd.tx.rts_retry_limit = rts_retry_limit;
 658         cmd->cmd.tx.data_retry_limit = data_retry_limit;
 659         cmd->cmd.tx.rate = rate;
 660         cmd->cmd.tx.tx_flags = tx_flags;
 661
 662         /* OFDM */
 663         cmd->cmd.tx.supp_rates[0] =
 664            ((rate_mask & IWL_OFDM_RATES_MASK) >> IWL_FIRST_OFDM_RATE) & 0xFF;
 665
 666         /* CCK */
 667         cmd->cmd.tx.supp_rates[1] = (rate_mask & 0xF);
 668
 669         IWL_DEBUG_RATE("Tx sta id: %d, rate: %d (plcp), flags: 0x%4X "
 670                        "cck/ofdm mask: 0x%x/0x%x\n", sta_id,
 671                        cmd->cmd.tx.rate, le32_to_cpu(cmd->cmd.tx.tx_flags),
 672                        cmd->cmd.tx.supp_rates[1], cmd->cmd.tx.supp_rates[0]);
 673 }
 674
 675 u8 iwl3945_sync_sta(struct iwl3945_priv *priv, int sta_id, u16 tx_rate, u8 flags)
 676 {
 677         unsigned long flags_spin;
 678         struct iwl3945_station_entry *station;
 679
 680         if (sta_id == IWL_INVALID_STATION)
 681                 return IWL_INVALID_STATION;
 682
 683         spin_lock_irqsave(&priv->sta_lock, flags_spin);
 684         station = &priv->stations[sta_id];
 685
 686         station->sta.sta.modify_mask = STA_MODIFY_TX_RATE_MSK;
 687         station->sta.rate_n_flags = cpu_to_le16(tx_rate);
 688         station->current_rate.rate_n_flags = tx_rate;
 689         station->sta.mode = STA_CONTROL_MODIFY_MSK;
 690
 691         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 692
 693         iwl3945_send_add_station(priv, &station->sta, flags);
 694         IWL_DEBUG_RATE("SCALE sync station %d to rate %d\n",
 695                         sta_id, tx_rate);
 696         return sta_id;
 697 }
 698
 699 static int iwl3945_nic_set_pwr_src(struct iwl3945_priv *priv, int pwr_max)
 700 {
 701         int rc;
 702         unsigned long flags;
 703
 704         spin_lock_irqsave(&priv->lock, flags);
 705         rc = iwl3945_grab_nic_access(priv);
 706         if (rc) {
 707                 spin_unlock_irqrestore(&priv->lock, flags);
 708                 return rc;
 709         }
 710
 711         if (!pwr_max) {
 712                 u32 val;
 713
 714                 rc = pci_read_config_dword(priv->pci_dev,
 715                                 PCI_POWER_SOURCE, &val);
 716                 if (val & PCI_CFG_PMC_PME_FROM_D3COLD_SUPPORT) {
 717                         iwl3945_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
 718                                         APMG_PS_CTRL_VAL_PWR_SRC_VAUX,
 719                                         ~APMG_PS_CTRL_MSK_PWR_SRC);
 720                         iwl3945_release_nic_access(priv);
 721
 722                         iwl3945_poll_bit(priv, CSR_GPIO_IN,
 723                                      CSR_GPIO_IN_VAL_VAUX_PWR_SRC,
 724                                      CSR_GPIO_IN_BIT_AUX_POWER, 5000);
 725                 } else
 726                         iwl3945_release_nic_access(priv);
 727         } else {
 728                 iwl3945_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
 729                                 APMG_PS_CTRL_VAL_PWR_SRC_VMAIN,
 730                                 ~APMG_PS_CTRL_MSK_PWR_SRC);
 731
 732                 iwl3945_release_nic_access(priv);
 733                 iwl3945_poll_bit(priv, CSR_GPIO_IN, CSR_GPIO_IN_VAL_VMAIN_PWR_SRC,
 734                              CSR_GPIO_IN_BIT_AUX_POWER, 5000);  /* uS */
 735         }
 736         spin_unlock_irqrestore(&priv->lock, flags);
 737
 738         return rc;
 739 }
 740
 741 static int iwl3945_rx_init(struct iwl3945_priv *priv, struct iwl3945_rx_queue *rxq)
 742 {
 743         int rc;
 744         unsigned long flags;
 745
 746         spin_lock_irqsave(&priv->lock, flags);
 747         rc = iwl3945_grab_nic_access(priv);
 748         if (rc) {
 749                 spin_unlock_irqrestore(&priv->lock, flags);
 750                 return rc;
 751         }
 752
 753         iwl3945_write_direct32(priv, FH_RCSR_RBD_BASE(0), rxq->dma_addr);
 754         iwl3945_write_direct32(priv, FH_RCSR_RPTR_ADDR(0),
 755                              priv->hw_setting.shared_phys +
 756                              offsetof(struct iwl3945_shared, rx_read_ptr[0]));
 757         iwl3945_write_direct32(priv, FH_RCSR_WPTR(0), 0);
 758         iwl3945_write_direct32(priv, FH_RCSR_CONFIG(0),
 759                 ALM_FH_RCSR_RX_CONFIG_REG_VAL_DMA_CHNL_EN_ENABLE |
 760                 ALM_FH_RCSR_RX_CONFIG_REG_VAL_RDRBD_EN_ENABLE |
 761                 ALM_FH_RCSR_RX_CONFIG_REG_BIT_WR_STTS_EN |
 762                 ALM_FH_RCSR_RX_CONFIG_REG_VAL_MAX_FRAG_SIZE_128 |
 763                 (RX_QUEUE_SIZE_LOG << ALM_FH_RCSR_RX_CONFIG_REG_POS_RBDC_SIZE) |
 764                 ALM_FH_RCSR_RX_CONFIG_REG_VAL_IRQ_DEST_INT_HOST |
 765                 (1 << ALM_FH_RCSR_RX_CONFIG_REG_POS_IRQ_RBTH) |
 766                 ALM_FH_RCSR_RX_CONFIG_REG_VAL_MSG_MODE_FH);
 767
 768         /* fake read to flush all prev I/O */
 769         iwl3945_read_direct32(priv, FH_RSSR_CTRL);
 770
 771         iwl3945_release_nic_access(priv);
 772         spin_unlock_irqrestore(&priv->lock, flags);
 773
 774         return 0;
 775 }
 776
 777 static int iwl3945_tx_reset(struct iwl3945_priv *priv)
 778 {
 779         int rc;
 780         unsigned long flags;
 781
 782         spin_lock_irqsave(&priv->lock, flags);
 783         rc = iwl3945_grab_nic_access(priv);
 784         if (rc) {
 785                 spin_unlock_irqrestore(&priv->lock, flags);
 786                 return rc;
 787         }
 788
 789         /* bypass mode */
 790         iwl3945_write_prph(priv, ALM_SCD_MODE_REG, 0x2);
 791
 792         /* RA 0 is active */
 793         iwl3945_write_prph(priv, ALM_SCD_ARASTAT_REG, 0x01);
 794
 795         /* all 6 fifo are active */
 796         iwl3945_write_prph(priv, ALM_SCD_TXFACT_REG, 0x3f);
 797
 798         iwl3945_write_prph(priv, ALM_SCD_SBYP_MODE_1_REG, 0x010000);
 799         iwl3945_write_prph(priv, ALM_SCD_SBYP_MODE_2_REG, 0x030002);
 800         iwl3945_write_prph(priv, ALM_SCD_TXF4MF_REG, 0x000004);
 801         iwl3945_write_prph(priv, ALM_SCD_TXF5MF_REG, 0x000005);
 802
 803         iwl3945_write_direct32(priv, FH_TSSR_CBB_BASE,
 804                              priv->hw_setting.shared_phys);
 805
 806         iwl3945_write_direct32(priv, FH_TSSR_MSG_CONFIG,
 807                 ALM_FH_TSSR_TX_MSG_CONFIG_REG_VAL_SNOOP_RD_TXPD_ON |
 808                 ALM_FH_TSSR_TX_MSG_CONFIG_REG_VAL_ORDER_RD_TXPD_ON |
 809                 ALM_FH_TSSR_TX_MSG_CONFIG_REG_VAL_MAX_FRAG_SIZE_128B |
 810                 ALM_FH_TSSR_TX_MSG_CONFIG_REG_VAL_SNOOP_RD_TFD_ON |
 811                 ALM_FH_TSSR_TX_MSG_CONFIG_REG_VAL_ORDER_RD_CBB_ON |
 812                 ALM_FH_TSSR_TX_MSG_CONFIG_REG_VAL_ORDER_RSP_WAIT_TH |
 813                 ALM_FH_TSSR_TX_MSG_CONFIG_REG_VAL_RSP_WAIT_TH);
 814
 815         iwl3945_release_nic_access(priv);
 816         spin_unlock_irqrestore(&priv->lock, flags);
 817
 818         return 0;
 819 }
 820
 821 /**
 822  * iwl3945_txq_ctx_reset - Reset TX queue context
 823  *
 824  * Destroys all DMA structures and initialize them again
 825  */
 826 static int iwl3945_txq_ctx_reset(struct iwl3945_priv *priv)
 827 {
 828         int rc;
 829         int txq_id, slots_num;
 830
 831         iwl3945_hw_txq_ctx_free(priv);
 832
 833         /* Tx CMD queue */
 834         rc = iwl3945_tx_reset(priv);
 835         if (rc)
 836                 goto error;
 837
 838         /* Tx queue(s) */
 839         for (txq_id = 0; txq_id < TFD_QUEUE_MAX; txq_id++) {
 840                 slots_num = (txq_id == IWL_CMD_QUEUE_NUM) ?
 841                                 TFD_CMD_SLOTS : TFD_TX_CMD_SLOTS;
 842                 rc = iwl3945_tx_queue_init(priv, &priv->txq[txq_id], slots_num,
 843                                 txq_id);
 844                 if (rc) {
 845                         IWL_ERROR("Tx %d queue init failed\n", txq_id);
 846                         goto error;
 847                 }
 848         }
 849
 850         return rc;
 851
 852  error:
 853         iwl3945_hw_txq_ctx_free(priv);
 854         return rc;
 855 }
 856
 857 int iwl3945_hw_nic_init(struct iwl3945_priv *priv)
 858 {
 859         u8 rev_id;
 860         int rc;
 861         unsigned long flags;
 862         struct iwl3945_rx_queue *rxq = &priv->rxq;
 863
 864         iwl3945_power_init_handle(priv);
 865
 866         spin_lock_irqsave(&priv->lock, flags);
 867         iwl3945_set_bit(priv, CSR_ANA_PLL_CFG, (1 << 24));
 868         iwl3945_set_bit(priv, CSR_GIO_CHICKEN_BITS,
 869                     CSR_GIO_CHICKEN_BITS_REG_BIT_L1A_NO_L0S_RX);
 870
 871         iwl3945_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
 872         rc = iwl3945_poll_bit(priv, CSR_GP_CNTRL,
 873                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
 874                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
 875         if (rc < 0) {
 876                 spin_unlock_irqrestore(&priv->lock, flags);
 877                 IWL_DEBUG_INFO("Failed to init the card\n");
 878                 return rc;
 879         }
 880
 881         rc = iwl3945_grab_nic_access(priv);
 882         if (rc) {
 883                 spin_unlock_irqrestore(&priv->lock, flags);
 884                 return rc;
 885         }
 886         iwl3945_write_prph(priv, APMG_CLK_EN_REG,
 887                                  APMG_CLK_VAL_DMA_CLK_RQT |
 888                                  APMG_CLK_VAL_BSM_CLK_RQT);
 889         udelay(20);
 890         iwl3945_set_bits_prph(priv, APMG_PCIDEV_STT_REG,
 891                                     APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
 892         iwl3945_release_nic_access(priv);
 893         spin_unlock_irqrestore(&priv->lock, flags);
 894
 895         /* Determine HW type */
 896         rc = pci_read_config_byte(priv->pci_dev, PCI_REVISION_ID, &rev_id);
 897         if (rc)
 898                 return rc;
 899         IWL_DEBUG_INFO("HW Revision ID = 0x%X\n", rev_id);
 900
 901         iwl3945_nic_set_pwr_src(priv, 1);
 902         spin_lock_irqsave(&priv->lock, flags);
 903
 904         if (rev_id & PCI_CFG_REV_ID_BIT_RTP)
 905                 IWL_DEBUG_INFO("RTP type \n");
 906         else if (rev_id & PCI_CFG_REV_ID_BIT_BASIC_SKU) {
 907                 IWL_DEBUG_INFO("ALM-MB type\n");
 908                 iwl3945_set_bit(priv, CSR_HW_IF_CONFIG_REG,
 909                             CSR_HW_IF_CONFIG_REG_BIT_ALMAGOR_MB);
 910         } else {
 911                 IWL_DEBUG_INFO("ALM-MM type\n");
 912                 iwl3945_set_bit(priv, CSR_HW_IF_CONFIG_REG,
 913                             CSR_HW_IF_CONFIG_REG_BIT_ALMAGOR_MM);
 914         }
 915
 916         spin_unlock_irqrestore(&priv->lock, flags);
 917
 918         /* Initialize the EEPROM */
 919         rc = iwl3945_eeprom_init(priv);
 920         if (rc)
 921                 return rc;
 922
 923         spin_lock_irqsave(&priv->lock, flags);
 924         if (EEPROM_SKU_CAP_OP_MODE_MRC == priv->eeprom.sku_cap) {
 925                 IWL_DEBUG_INFO("SKU OP mode is mrc\n");
 926                 iwl3945_set_bit(priv, CSR_HW_IF_CONFIG_REG,
 927                             CSR_HW_IF_CONFIG_REG_BIT_SKU_MRC);
 928         } else
 929                 IWL_DEBUG_INFO("SKU OP mode is basic\n");
 930
 931         if ((priv->eeprom.board_revision & 0xF0) == 0xD0) {
 932                 IWL_DEBUG_INFO("3945ABG revision is 0x%X\n",
 933                                priv->eeprom.board_revision);
 934                 iwl3945_set_bit(priv, CSR_HW_IF_CONFIG_REG,
 935                             CSR_HW_IF_CONFIG_REG_BIT_BOARD_TYPE);
 936         } else {
 937                 IWL_DEBUG_INFO("3945ABG revision is 0x%X\n",
 938                                priv->eeprom.board_revision);
 939                 iwl3945_clear_bit(priv, CSR_HW_IF_CONFIG_REG,
 940                               CSR_HW_IF_CONFIG_REG_BIT_BOARD_TYPE);
 941         }
 942
 943         if (priv->eeprom.almgor_m_version <= 1) {
 944                 iwl3945_set_bit(priv, CSR_HW_IF_CONFIG_REG,
 945                             CSR_HW_IF_CONFIG_REG_BITS_SILICON_TYPE_A);
 946                 IWL_DEBUG_INFO("Card M type A version is 0x%X\n",
 947                                priv->eeprom.almgor_m_version);
 948         } else {
 949                 IWL_DEBUG_INFO("Card M type B version is 0x%X\n",
 950                                priv->eeprom.almgor_m_version);
 951                 iwl3945_set_bit(priv, CSR_HW_IF_CONFIG_REG,
 952                             CSR_HW_IF_CONFIG_REG_BITS_SILICON_TYPE_B);
 953         }
 954         spin_unlock_irqrestore(&priv->lock, flags);
 955
 956         if (priv->eeprom.sku_cap & EEPROM_SKU_CAP_SW_RF_KILL_ENABLE)
 957                 IWL_DEBUG_RF_KILL("SW RF KILL supported in EEPROM.\n");
 958
 959         if (priv->eeprom.sku_cap & EEPROM_SKU_CAP_HW_RF_KILL_ENABLE)
 960                 IWL_DEBUG_RF_KILL("HW RF KILL supported in EEPROM.\n");
 961
 962         /* Allocate the RX queue, or reset if it is already allocated */
 963         if (!rxq->bd) {
 964                 rc = iwl3945_rx_queue_alloc(priv);
 965                 if (rc) {
 966                         IWL_ERROR("Unable to initialize Rx queue\n");
 967                         return -ENOMEM;
 968                 }
 969         } else
 970                 iwl3945_rx_queue_reset(priv, rxq);
 971
 972         iwl3945_rx_replenish(priv);
 973
 974         iwl3945_rx_init(priv, rxq);
 975
 976         spin_lock_irqsave(&priv->lock, flags);
 977
 978         /* Look at using this instead:
 979         rxq->need_update = 1;
 980         iwl3945_rx_queue_update_write_ptr(priv, rxq);
 981         */
 982
 983         rc = iwl3945_grab_nic_access(priv);
 984         if (rc) {
 985                 spin_unlock_irqrestore(&priv->lock, flags);
 986                 return rc;
 987         }
 988         iwl3945_write_direct32(priv, FH_RCSR_WPTR(0), rxq->write & ~7);
 989         iwl3945_release_nic_access(priv);
 990
 991         spin_unlock_irqrestore(&priv->lock, flags);
 992
 993         rc = iwl3945_txq_ctx_reset(priv);
 994         if (rc)
 995                 return rc;
 996
 997         set_bit(STATUS_INIT, &priv->status);
 998
 999         return 0;
1000 }
1001
1002 /**
1003  * iwl3945_hw_txq_ctx_free - Free TXQ Context
1004  *
1005  * Destroy all TX DMA queues and structures
1006  */
1007 void iwl3945_hw_txq_ctx_free(struct iwl3945_priv *priv)
1008 {
1009         int txq_id;
1010
1011         /* Tx queues */
1012         for (txq_id = 0; txq_id < TFD_QUEUE_MAX; txq_id++)
1013                 iwl3945_tx_queue_free(priv, &priv->txq[txq_id]);
1014 }
1015
1016 void iwl3945_hw_txq_ctx_stop(struct iwl3945_priv *priv)
1017 {
1018         int queue;
1019         unsigned long flags;
1020
1021         spin_lock_irqsave(&priv->lock, flags);
1022         if (iwl3945_grab_nic_access(priv)) {
1023                 spin_unlock_irqrestore(&priv->lock, flags);
1024                 iwl3945_hw_txq_ctx_free(priv);
1025                 return;
1026         }
1027
1028         /* stop SCD */
1029         iwl3945_write_prph(priv, ALM_SCD_MODE_REG, 0);
1030
1031         /* reset TFD queues */
1032         for (queue = TFD_QUEUE_MIN; queue < TFD_QUEUE_MAX; queue++) {
1033                 iwl3945_write_direct32(priv, FH_TCSR_CONFIG(queue), 0x0);
1034                 iwl3945_poll_direct_bit(priv, FH_TSSR_TX_STATUS,
1035                                 ALM_FH_TSSR_TX_STATUS_REG_MSK_CHNL_IDLE(queue),
1036                                 1000);
1037         }
1038
1039         iwl3945_release_nic_access(priv);
1040         spin_unlock_irqrestore(&priv->lock, flags);
1041
1042         iwl3945_hw_txq_ctx_free(priv);
1043 }
1044
1045 int iwl3945_hw_nic_stop_master(struct iwl3945_priv *priv)
1046 {
1047         int rc = 0;
1048         u32 reg_val;
1049         unsigned long flags;
1050
1051         spin_lock_irqsave(&priv->lock, flags);
1052
1053         /* set stop master bit */
1054         iwl3945_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
1055
1056         reg_val = iwl3945_read32(priv, CSR_GP_CNTRL);
1057
1058         if (CSR_GP_CNTRL_REG_FLAG_MAC_POWER_SAVE ==
1059             (reg_val & CSR_GP_CNTRL_REG_MSK_POWER_SAVE_TYPE))
1060                 IWL_DEBUG_INFO("Card in power save, master is already "
1061                                "stopped\n");
1062         else {
1063                 rc = iwl3945_poll_bit(priv, CSR_RESET,
1064                                   CSR_RESET_REG_FLAG_MASTER_DISABLED,
1065                                   CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
1066                 if (rc < 0) {
1067                         spin_unlock_irqrestore(&priv->lock, flags);
1068                         return rc;
1069                 }
1070         }
1071
1072         spin_unlock_irqrestore(&priv->lock, flags);
1073         IWL_DEBUG_INFO("stop master\n");
1074
1075         return rc;
1076 }
1077
1078 int iwl3945_hw_nic_reset(struct iwl3945_priv *priv)
1079 {
1080         int rc;
1081         unsigned long flags;
1082
1083         iwl3945_hw_nic_stop_master(priv);
1084
1085         spin_lock_irqsave(&priv->lock, flags);
1086
1087         iwl3945_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
1088
1089         rc = iwl3945_poll_bit(priv, CSR_GP_CNTRL,
1090                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
1091                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
1092
1093         rc = iwl3945_grab_nic_access(priv);
1094         if (!rc) {
1095                 iwl3945_write_prph(priv, APMG_CLK_CTRL_REG,
1096                                          APMG_CLK_VAL_BSM_CLK_RQT);
1097
1098                 udelay(10);
1099
1100                 iwl3945_set_bit(priv, CSR_GP_CNTRL,
1101                             CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
1102
1103                 iwl3945_write_prph(priv, APMG_RTC_INT_MSK_REG, 0x0);
1104                 iwl3945_write_prph(priv, APMG_RTC_INT_STT_REG,
1105                                         0xFFFFFFFF);
1106
1107                 /* enable DMA */
1108                 iwl3945_write_prph(priv, APMG_CLK_EN_REG,
1109                                          APMG_CLK_VAL_DMA_CLK_RQT |
1110                                          APMG_CLK_VAL_BSM_CLK_RQT);
1111                 udelay(10);
1112
1113                 iwl3945_set_bits_prph(priv, APMG_PS_CTRL_REG,
1114                                 APMG_PS_CTRL_VAL_RESET_REQ);
1115                 udelay(5);
1116                 iwl3945_clear_bits_prph(priv, APMG_PS_CTRL_REG,
1117                                 APMG_PS_CTRL_VAL_RESET_REQ);
1118                 iwl3945_release_nic_access(priv);
1119         }
1120
1121         /* Clear the 'host command active' bit... */
1122         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
1123
1124         wake_up_interruptible(&priv->wait_command_queue);
1125         spin_unlock_irqrestore(&priv->lock, flags);
1126
1127         return rc;
1128 }
1129
1130 /**
1131  * iwl3945_hw_reg_adjust_power_by_temp
1132  * return index delta into power gain settings table
1133 */
1134 static int iwl3945_hw_reg_adjust_power_by_temp(int new_reading, int old_reading)
1135 {
1136         return (new_reading - old_reading) * (-11) / 100;
1137 }
1138
1139 /**
1140  * iwl3945_hw_reg_temp_out_of_range - Keep temperature in sane range
1141  */
1142 static inline int iwl3945_hw_reg_temp_out_of_range(int temperature)
1143 {
1144         return (((temperature < -260) || (temperature > 25)) ? 1 : 0);
1145 }
1146
1147 int iwl3945_hw_get_temperature(struct iwl3945_priv *priv)
1148 {
1149         return iwl3945_read32(priv, CSR_UCODE_DRV_GP2);
1150 }
1151
1152 /**
1153  * iwl3945_hw_reg_txpower_get_temperature
1154  * get the current temperature by reading from NIC
1155 */
1156 static int iwl3945_hw_reg_txpower_get_temperature(struct iwl3945_priv *priv)
1157 {
1158         int temperature;
1159
1160         temperature = iwl3945_hw_get_temperature(priv);
1161
1162         /* driver's okay range is -260 to +25.
1163          *   human readable okay range is 0 to +285 */
1164         IWL_DEBUG_INFO("Temperature: %d\n", temperature + IWL_TEMP_CONVERT);
1165
1166         /* handle insane temp reading */
1167         if (iwl3945_hw_reg_temp_out_of_range(temperature)) {
1168                 IWL_ERROR("Error bad temperature value  %d\n", temperature);
1169
1170                 /* if really really hot(?),
1171                  *   substitute the 3rd band/group's temp measured at factory */
1172                 if (priv->last_temperature > 100)
1173                         temperature = priv->eeprom.groups[2].temperature;
1174                 else /* else use most recent "sane" value from driver */
1175                         temperature = priv->last_temperature;
1176         }
1177
1178         return temperature;     /* raw, not "human readable" */
1179 }
1180
1181 /* Adjust Txpower only if temperature variance is greater than threshold.
1182  *
1183  * Both are lower than older versions' 9 degrees */
1184 #define IWL_TEMPERATURE_LIMIT_TIMER   6
1185
1186 /**
1187  * is_temp_calib_needed - determines if new calibration is needed
1188  *
1189  * records new temperature in tx_mgr->temperature.
1190  * replaces tx_mgr->last_temperature *only* if calib needed
1191  *    (assumes caller will actually do the calibration!). */
1192 static int is_temp_calib_needed(struct iwl3945_priv *priv)
1193 {
1194         int temp_diff;
1195
1196         priv->temperature = iwl3945_hw_reg_txpower_get_temperature(priv);
1197         temp_diff = priv->temperature - priv->last_temperature;
1198
1199         /* get absolute value */
1200         if (temp_diff < 0) {
1201                 IWL_DEBUG_POWER("Getting cooler, delta %d,\n", temp_diff);
1202                 temp_diff = -temp_diff;
1203         } else if (temp_diff == 0)
1204                 IWL_DEBUG_POWER("Same temp,\n");
1205         else
1206                 IWL_DEBUG_POWER("Getting warmer, delta %d,\n", temp_diff);
1207
1208         /* if we don't need calibration, *don't* update last_temperature */
1209         if (temp_diff < IWL_TEMPERATURE_LIMIT_TIMER) {
1210                 IWL_DEBUG_POWER("Timed thermal calib not needed\n");
1211                 return 0;
1212         }
1213
1214         IWL_DEBUG_POWER("Timed thermal calib needed\n");
1215
1216         /* assume that caller will actually do calib ...
1217          *   update the "last temperature" value */
1218         priv->last_temperature = priv->temperature;
1219         return 1;
1220 }
1221
1222 #define IWL_MAX_GAIN_ENTRIES 78
1223 #define IWL_CCK_FROM_OFDM_POWER_DIFF  -5
1224 #define IWL_CCK_FROM_OFDM_INDEX_DIFF (10)
1225
1226 /* radio and DSP power table, each step is 1/2 dB.
1227  * 1st number is for RF analog gain, 2nd number is for DSP pre-DAC gain. */
1228 static struct iwl3945_tx_power power_gain_table[2][IWL_MAX_GAIN_ENTRIES] = {
1229         {
1230          {251, 127},            /* 2.4 GHz, highest power */
1231          {251, 127},
1232          {251, 127},
1233          {251, 127},
1234          {251, 125},
1235          {251, 110},
1236          {251, 105},
1237          {251, 98},
1238          {187, 125},
1239          {187, 115},
1240          {187, 108},
1241          {187, 99},
1242          {243, 119},
1243          {243, 111},
1244          {243, 105},
1245          {243, 97},
1246          {243, 92},
1247          {211, 106},
1248          {211, 100},
1249          {179, 120},
1250          {179, 113},
1251          {179, 107},
1252          {147, 125},
1253          {147, 119},
1254          {147, 112},
1255          {147, 106},
1256          {147, 101},
1257          {147, 97},
1258          {147, 91},
1259          {115, 107},
1260          {235, 121},
1261          {235, 115},
1262          {235, 109},
1263          {203, 127},
1264          {203, 121},
1265          {203, 115},
1266          {203, 108},
1267          {203, 102},
1268          {203, 96},
1269          {203, 92},
1270          {171, 110},
1271          {171, 104},
1272          {171, 98},
1273          {139, 116},
1274          {227, 125},
1275          {227, 119},
1276          {227, 113},
1277          {227, 107},
1278          {227, 101},
1279          {227, 96},
1280          {195, 113},
1281          {195, 106},
1282          {195, 102},
1283          {195, 95},
1284          {163, 113},
1285          {163, 106},
1286          {163, 102},
1287          {163, 95},
1288          {131, 113},
1289          {131, 106},
1290          {131, 102},
1291          {131, 95},
1292          {99, 113},
1293          {99, 106},
1294          {99, 102},
1295          {99, 95},
1296          {67, 113},
1297          {67, 106},
1298          {67, 102},
1299          {67, 95},
1300          {35, 113},
1301          {35, 106},
1302          {35, 102},
1303          {35, 95},
1304          {3, 113},
1305          {3, 106},
1306          {3, 102},
1307          {3, 95} },             /* 2.4 GHz, lowest power */
1308         {
1309          {251, 127},            /* 5.x GHz, highest power */
1310          {251, 120},
1311          {251, 114},
1312          {219, 119},
1313          {219, 101},
1314          {187, 113},
1315          {187, 102},
1316          {155, 114},
1317          {155, 103},
1318          {123, 117},
1319          {123, 107},
1320          {123, 99},
1321          {123, 92},
1322          {91, 108},
1323          {59, 125},
1324          {59, 118},
1325          {59, 109},
1326          {59, 102},
1327          {59, 96},
1328          {59, 90},
1329          {27, 104},
1330          {27, 98},
1331          {27, 92},
1332          {115, 118},
1333          {115, 111},
1334          {115, 104},
1335          {83, 126},
1336          {83, 121},
1337          {83, 113},
1338          {83, 105},
1339          {83, 99},
1340          {51, 118},
1341          {51, 111},
1342          {51, 104},
1343          {51, 98},
1344          {19, 116},
1345          {19, 109},
1346          {19, 102},
1347          {19, 98},
1348          {19, 93},
1349          {171, 113},
1350          {171, 107},
1351          {171, 99},
1352          {139, 120},
1353          {139, 113},
1354          {139, 107},
1355          {139, 99},
1356          {107, 120},
1357          {107, 113},
1358          {107, 107},
1359          {107, 99},
1360          {75, 120},
1361          {75, 113},
1362          {75, 107},
1363          {75, 99},
1364          {43, 120},
1365          {43, 113},
1366          {43, 107},
1367          {43, 99},
1368          {11, 120},
1369          {11, 113},
1370          {11, 107},
1371          {11, 99},
1372          {131, 107},
1373          {131, 99},
1374          {99, 120},
1375          {99, 113},
1376          {99, 107},
1377          {99, 99},
1378          {67, 120},
1379          {67, 113},
1380          {67, 107},
1381          {67, 99},
1382          {35, 120},
1383          {35, 113},
1384          {35, 107},
1385          {35, 99},
1386          {3, 120} }             /* 5.x GHz, lowest power */
1387 };
1388
1389 static inline u8 iwl3945_hw_reg_fix_power_index(int index)
1390 {
1391         if (index < 0)
1392                 return 0;
1393         if (index >= IWL_MAX_GAIN_ENTRIES)
1394                 return IWL_MAX_GAIN_ENTRIES - 1;
1395         return (u8) index;
1396 }
1397
1398 /* Kick off thermal recalibration check every 60 seconds */
1399 #define REG_RECALIB_PERIOD (60)
1400
1401 /**
1402  * iwl3945_hw_reg_set_scan_power - Set Tx power for scan probe requests
1403  *
1404  * Set (in our channel info database) the direct scan Tx power for 1 Mbit (CCK)
1405  * or 6 Mbit (OFDM) rates.
1406  */
1407 static void iwl3945_hw_reg_set_scan_power(struct iwl3945_priv *priv, u32 scan_tbl_index,
1408                                s32 rate_index, const s8 *clip_pwrs,
1409                                struct iwl3945_channel_info *ch_info,
1410                                int band_index)
1411 {
1412         struct iwl3945_scan_power_info *scan_power_info;
1413         s8 power;
1414         u8 power_index;
1415
1416         scan_power_info = &ch_info->scan_pwr_info[scan_tbl_index];
1417
1418         /* use this channel group's 6Mbit clipping/saturation pwr,
1419          *   but cap at regulatory scan power restriction (set during init
1420          *   based on eeprom channel data) for this channel.  */
1421         power = min(ch_info->scan_power, clip_pwrs[IWL_RATE_6M_INDEX_TABLE]);
1422
1423         /* further limit to user's max power preference.
1424          * FIXME:  Other spectrum management power limitations do not
1425          *   seem to apply?? */
1426         power = min(power, priv->user_txpower_limit);
1427         scan_power_info->requested_power = power;
1428
1429         /* find difference between new scan *power* and current "normal"
1430          *   Tx *power* for 6Mb.  Use this difference (x2) to adjust the
1431          *   current "normal" temperature-compensated Tx power *index* for
1432          *   this rate (1Mb or 6Mb) to yield new temp-compensated scan power
1433          *   *index*. */
1434         power_index = ch_info->power_info[rate_index].power_table_index
1435             - (power - ch_info->power_info
1436                [IWL_RATE_6M_INDEX_TABLE].requested_power) * 2;
1437
1438         /* store reference index that we use when adjusting *all* scan
1439          *   powers.  So we can accommodate user (all channel) or spectrum
1440          *   management (single channel) power changes "between" temperature
1441          *   feedback compensation procedures.
1442          * don't force fit this reference index into gain table; it may be a
1443          *   negative number.  This will help avoid errors when we're at
1444          *   the lower bounds (highest gains, for warmest temperatures)
1445          *   of the table. */
1446
1447         /* don't exceed table bounds for "real" setting */
1448         power_index = iwl3945_hw_reg_fix_power_index(power_index);
1449
1450         scan_power_info->power_table_index = power_index;
1451         scan_power_info->tpc.tx_gain =
1452             power_gain_table[band_index][power_index].tx_gain;
1453         scan_power_info->tpc.dsp_atten =
1454             power_gain_table[band_index][power_index].dsp_atten;
1455 }
1456
1457 /**
1458  * iwl3945_hw_reg_send_txpower - fill in Tx Power command with gain settings
1459  *
1460  * Configures power settings for all rates for the current channel,
1461  * using values from channel info struct, and send to NIC
1462  */
1463 int iwl3945_hw_reg_send_txpower(struct iwl3945_priv *priv)
1464 {
1465         int rate_idx, i;
1466         const struct iwl3945_channel_info *ch_info = NULL;
1467         struct iwl3945_txpowertable_cmd txpower = {
1468                 .channel = priv->active_rxon.channel,
1469         };
1470
1471         txpower.band = (priv->phymode == MODE_IEEE80211A) ? 0 : 1;
1472         ch_info = iwl3945_get_channel_info(priv,
1473                                        priv->phymode,
1474                                        le16_to_cpu(priv->active_rxon.channel));
1475         if (!ch_info) {
1476                 IWL_ERROR
1477                     ("Failed to get channel info for channel %d [%d]\n",
1478                      le16_to_cpu(priv->active_rxon.channel), priv->phymode);
1479                 return -EINVAL;
1480         }
1481
1482         if (!is_channel_valid(ch_info)) {
1483                 IWL_DEBUG_POWER("Not calling TX_PWR_TABLE_CMD on "
1484                                 "non-Tx channel.\n");
1485                 return 0;
1486         }
1487
1488         /* fill cmd with power settings for all rates for current channel */
1489         /* Fill OFDM rate */
1490         for (rate_idx = IWL_FIRST_OFDM_RATE, i = 0;
1491              rate_idx <= IWL_LAST_OFDM_RATE; rate_idx++, i++) {
1492
1493                 txpower.power[i].tpc = ch_info->power_info[i].tpc;
1494                 txpower.power[i].rate = iwl3945_rates[rate_idx].plcp;
1495
1496                 IWL_DEBUG_POWER("ch %d:%d rf %d dsp %3d rate code 0x%02x\n",
1497                                 le16_to_cpu(txpower.channel),
1498                                 txpower.band,
1499                                 txpower.power[i].tpc.tx_gain,
1500                                 txpower.power[i].tpc.dsp_atten,
1501                                 txpower.power[i].rate);
1502         }
1503         /* Fill CCK rates */
1504         for (rate_idx = IWL_FIRST_CCK_RATE;
1505              rate_idx <= IWL_LAST_CCK_RATE; rate_idx++, i++) {
1506                 txpower.power[i].tpc = ch_info->power_info[i].tpc;
1507                 txpower.power[i].rate = iwl3945_rates[rate_idx].plcp;
1508
1509                 IWL_DEBUG_POWER("ch %d:%d rf %d dsp %3d rate code 0x%02x\n",
1510                                 le16_to_cpu(txpower.channel),
1511                                 txpower.band,
1512                                 txpower.power[i].tpc.tx_gain,
1513                                 txpower.power[i].tpc.dsp_atten,
1514                                 txpower.power[i].rate);
1515         }
1516
1517         return iwl3945_send_cmd_pdu(priv, REPLY_TX_PWR_TABLE_CMD,
1518                         sizeof(struct iwl3945_txpowertable_cmd), &txpower);
1519
1520 }
1521
1522 /**
1523  * iwl3945_hw_reg_set_new_power - Configures power tables at new levels
1524  * @ch_info: Channel to update.  Uses power_info.requested_power.
1525  *
1526  * Replace requested_power and base_power_index ch_info fields for
1527  * one channel.
1528  *
1529  * Called if user or spectrum management changes power preferences.
1530  * Takes into account h/w and modulation limitations (clip power).
1531  *
1532  * This does *not* send anything to NIC, just sets up ch_info for one channel.
1533  *
1534  * NOTE: reg_compensate_for_temperature_dif() *must* be run after this to
1535  *       properly fill out the scan powers, and actual h/w gain settings,
1536  *       and send changes to NIC
1537  */
1538 static int iwl3945_hw_reg_set_new_power(struct iwl3945_priv *priv,
1539                              struct iwl3945_channel_info *ch_info)
1540 {
1541         struct iwl3945_channel_power_info *power_info;
1542         int power_changed = 0;
1543         int i;
1544         const s8 *clip_pwrs;
1545         int power;
1546
1547         /* Get this chnlgrp's rate-to-max/clip-powers table */
1548         clip_pwrs = priv->clip_groups[ch_info->group_index].clip_powers;
1549
1550         /* Get this channel's rate-to-current-power settings table */
1551         power_info = ch_info->power_info;
1552
1553         /* update OFDM Txpower settings */
1554         for (i = IWL_RATE_6M_INDEX_TABLE; i <= IWL_RATE_54M_INDEX_TABLE;
1555              i++, ++power_info) {
1556                 int delta_idx;
1557
1558                 /* limit new power to be no more than h/w capability */
1559                 power = min(ch_info->curr_txpow, clip_pwrs[i]);
1560                 if (power == power_info->requested_power)
1561                         continue;
1562
1563                 /* find difference between old and new requested powers,
1564                  *    update base (non-temp-compensated) power index */
1565                 delta_idx = (power - power_info->requested_power) * 2;
1566                 power_info->base_power_index -= delta_idx;
1567
1568                 /* save new requested power value */
1569                 power_info->requested_power = power;
1570
1571                 power_changed = 1;
1572         }
1573
1574         /* update CCK Txpower settings, based on OFDM 12M setting ...
1575          *    ... all CCK power settings for a given channel are the *same*. */
1576         if (power_changed) {
1577                 power =
1578                     ch_info->power_info[IWL_RATE_12M_INDEX_TABLE].
1579                     requested_power + IWL_CCK_FROM_OFDM_POWER_DIFF;
1580
1581                 /* do all CCK rates' iwl3945_channel_power_info structures */
1582                 for (i = IWL_RATE_1M_INDEX_TABLE; i <= IWL_RATE_11M_INDEX_TABLE; i++) {
1583                         power_info->requested_power = power;
1584                         power_info->base_power_index =
1585                             ch_info->power_info[IWL_RATE_12M_INDEX_TABLE].
1586                             base_power_index + IWL_CCK_FROM_OFDM_INDEX_DIFF;
1587                         ++power_info;
1588                 }
1589         }
1590
1591         return 0;
1592 }
1593
1594 /**
1595  * iwl3945_hw_reg_get_ch_txpower_limit - returns new power limit for channel
1596  *
1597  * NOTE: Returned power limit may be less (but not more) than requested,
1598  *       based strictly on regulatory (eeprom and spectrum mgt) limitations
1599  *       (no consideration for h/w clipping limitations).
1600  */
1601 static int iwl3945_hw_reg_get_ch_txpower_limit(struct iwl3945_channel_info *ch_info)
1602 {
1603         s8 max_power;
1604
1605 #if 0
1606         /* if we're using TGd limits, use lower of TGd or EEPROM */
1607         if (ch_info->tgd_data.max_power != 0)
1608                 max_power = min(ch_info->tgd_data.max_power,
1609                                 ch_info->eeprom.max_power_avg);
1610
1611         /* else just use EEPROM limits */
1612         else
1613 #endif
1614                 max_power = ch_info->eeprom.max_power_avg;
1615
1616         return min(max_power, ch_info->max_power_avg);
1617 }
1618
1619 /**
1620  * iwl3945_hw_reg_comp_txpower_temp - Compensate for temperature
1621  *
1622  * Compensate txpower settings of *all* channels for temperature.
1623  * This only accounts for the difference between current temperature
1624  *   and the factory calibration temperatures, and bases the new settings
1625  *   on the channel's base_power_index.
1626  *
1627  * If RxOn is "associated", this sends the new Txpower to NIC!
1628  */
1629 static int iwl3945_hw_reg_comp_txpower_temp(struct iwl3945_priv *priv)
1630 {
1631         struct iwl3945_channel_info *ch_info = NULL;
1632         int delta_index;
1633         const s8 *clip_pwrs; /* array of h/w max power levels for each rate */
1634         u8 a_band;
1635         u8 rate_index;
1636         u8 scan_tbl_index;
1637         u8 i;
1638         int ref_temp;
1639         int temperature = priv->temperature;
1640
1641         /* set up new Tx power info for each and every channel, 2.4 and 5.x */
1642         for (i = 0; i < priv->channel_count; i++) {
1643                 ch_info = &priv->channel_info[i];
1644                 a_band = is_channel_a_band(ch_info);
1645
1646                 /* Get this chnlgrp's factory calibration temperature */
1647                 ref_temp = (s16)priv->eeprom.groups[ch_info->group_index].
1648                     temperature;
1649
1650                 /* get power index adjustment based on curr and factory
1651                  * temps */
1652                 delta_index = iwl3945_hw_reg_adjust_power_by_temp(temperature,
1653                                                               ref_temp);
1654
1655                 /* set tx power value for all rates, OFDM and CCK */
1656                 for (rate_index = 0; rate_index < IWL_RATE_COUNT;
1657                      rate_index++) {
1658                         int power_idx =
1659                             ch_info->power_info[rate_index].base_power_index;
1660
1661                         /* temperature compensate */
1662                         power_idx += delta_index;
1663
1664                         /* stay within table range */
1665                         power_idx = iwl3945_hw_reg_fix_power_index(power_idx);
1666                         ch_info->power_info[rate_index].
1667                             power_table_index = (u8) power_idx;
1668                         ch_info->power_info[rate_index].tpc =
1669                             power_gain_table[a_band][power_idx];
1670                 }
1671
1672                 /* Get this chnlgrp's rate-to-max/clip-powers table */
1673                 clip_pwrs = priv->clip_groups[ch_info->group_index].clip_powers;
1674
1675                 /* set scan tx power, 1Mbit for CCK, 6Mbit for OFDM */
1676                 for (scan_tbl_index = 0;
1677                      scan_tbl_index < IWL_NUM_SCAN_RATES; scan_tbl_index++) {
1678                         s32 actual_index = (scan_tbl_index == 0) ?
1679                             IWL_RATE_1M_INDEX_TABLE : IWL_RATE_6M_INDEX_TABLE;
1680                         iwl3945_hw_reg_set_scan_power(priv, scan_tbl_index,
1681                                            actual_index, clip_pwrs,
1682                                            ch_info, a_band);
1683                 }
1684         }
1685
1686         /* send Txpower command for current channel to ucode */
1687         return iwl3945_hw_reg_send_txpower(priv);
1688 }
1689
1690 int iwl3945_hw_reg_set_txpower(struct iwl3945_priv *priv, s8 power)
1691 {
1692         struct iwl3945_channel_info *ch_info;
1693         s8 max_power;
1694         u8 a_band;
1695         u8 i;
1696
1697         if (priv->user_txpower_limit == power) {
1698                 IWL_DEBUG_POWER("Requested Tx power same as current "
1699                                 "limit: %ddBm.\n", power);
1700                 return 0;
1701         }
1702
1703         IWL_DEBUG_POWER("Setting upper limit clamp to %ddBm.\n", power);
1704         priv->user_txpower_limit = power;
1705
1706         /* set up new Tx powers for each and every channel, 2.4 and 5.x */
1707
1708         for (i = 0; i < priv->channel_count; i++) {
1709                 ch_info = &priv->channel_info[i];
1710                 a_band = is_channel_a_band(ch_info);
1711
1712                 /* find minimum power of all user and regulatory constraints
1713                  *    (does not consider h/w clipping limitations) */
1714                 max_power = iwl3945_hw_reg_get_ch_txpower_limit(ch_info);
1715                 max_power = min(power, max_power);
1716                 if (max_power != ch_info->curr_txpow) {
1717                         ch_info->curr_txpow = max_power;
1718
1719                         /* this considers the h/w clipping limitations */
1720                         iwl3945_hw_reg_set_new_power(priv, ch_info);
1721                 }
1722         }
1723
1724         /* update txpower settings for all channels,
1725          *   send to NIC if associated. */
1726         is_temp_calib_needed(priv);
1727         iwl3945_hw_reg_comp_txpower_temp(priv);
1728
1729         return 0;
1730 }
1731
1732 /* will add 3945 channel switch cmd handling later */
1733 int iwl3945_hw_channel_switch(struct iwl3945_priv *priv, u16 channel)
1734 {
1735         return 0;
1736 }
1737
1738 /**
1739  * iwl3945_reg_txpower_periodic -  called when time to check our temperature.
1740  *
1741  * -- reset periodic timer
1742  * -- see if temp has changed enough to warrant re-calibration ... if so:
1743  *     -- correct coeffs for temp (can reset temp timer)
1744  *     -- save this temp as "last",
1745  *     -- send new set of gain settings to NIC
1746  * NOTE:  This should continue working, even when we're not associated,
1747  *   so we can keep our internal table of scan powers current. */
1748 void iwl3945_reg_txpower_periodic(struct iwl3945_priv *priv)
1749 {
1750         /* This will kick in the "brute force"
1751          * iwl3945_hw_reg_comp_txpower_temp() below */
1752         if (!is_temp_calib_needed(priv))
1753                 goto reschedule;
1754
1755         /* Set up a new set of temp-adjusted TxPowers, send to NIC.
1756          * This is based *only* on current temperature,
1757          * ignoring any previous power measurements */
1758         iwl3945_hw_reg_comp_txpower_temp(priv);
1759
1760  reschedule:
1761         queue_delayed_work(priv->workqueue,
1762                            &priv->thermal_periodic, REG_RECALIB_PERIOD * HZ);
1763 }
1764
1765 static void iwl3945_bg_reg_txpower_periodic(struct work_struct *work)
1766 {
1767         struct iwl3945_priv *priv = container_of(work, struct iwl3945_priv,
1768                                              thermal_periodic.work);
1769
1770         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1771                 return;
1772
1773         mutex_lock(&priv->mutex);
1774         iwl3945_reg_txpower_periodic(priv);
1775         mutex_unlock(&priv->mutex);
1776 }
1777
1778 /**
1779  * iwl3945_hw_reg_get_ch_grp_index - find the channel-group index (0-4)
1780  *                                 for the channel.
1781  *
1782  * This function is used when initializing channel-info structs.
1783  *
1784  * NOTE: These channel groups do *NOT* match the bands above!
1785  *       These channel groups are based on factory-tested channels;
1786  *       on A-band, EEPROM's "group frequency" entries represent the top
1787  *       channel in each group 1-4.  Group 5 All B/G channels are in group 0.
1788  */
1789 static u16 iwl3945_hw_reg_get_ch_grp_index(struct iwl3945_priv *priv,
1790                                        const struct iwl3945_channel_info *ch_info)
1791 {
1792         struct iwl3945_eeprom_txpower_group *ch_grp = &priv->eeprom.groups[0];
1793         u8 group;
1794         u16 group_index = 0;    /* based on factory calib frequencies */
1795         u8 grp_channel;
1796
1797         /* Find the group index for the channel ... don't use index 1(?) */
1798         if (is_channel_a_band(ch_info)) {
1799                 for (group = 1; group < 5; group++) {
1800                         grp_channel = ch_grp[group].group_channel;
1801                         if (ch_info->channel <= grp_channel) {
1802                                 group_index = group;
1803                                 break;
1804                         }
1805                 }
1806                 /* group 4 has a few channels *above* its factory cal freq */
1807                 if (group == 5)
1808                         group_index = 4;
1809         } else
1810                 group_index = 0;        /* 2.4 GHz, group 0 */
1811
1812         IWL_DEBUG_POWER("Chnl %d mapped to grp %d\n", ch_info->channel,
1813                         group_index);
1814         return group_index;
1815 }
1816
1817 /**
1818  * iwl3945_hw_reg_get_matched_power_index - Interpolate to get nominal index
1819  *
1820  * Interpolate to get nominal (i.e. at factory calibration temperature) index
1821  *   into radio/DSP gain settings table for requested power.
1822  */
1823 static int iwl3945_hw_reg_get_matched_power_index(struct iwl3945_priv *priv,
1824                                        s8 requested_power,
1825                                        s32 setting_index, s32 *new_index)
1826 {
1827         const struct iwl3945_eeprom_txpower_group *chnl_grp = NULL;
1828         s32 index0, index1;
1829         s32 power = 2 * requested_power;
1830         s32 i;
1831         const struct iwl3945_eeprom_txpower_sample *samples;
1832         s32 gains0, gains1;
1833         s32 res;
1834         s32 denominator;
1835
1836         chnl_grp = &priv->eeprom.groups[setting_index];
1837         samples = chnl_grp->samples;
1838         for (i = 0; i < 5; i++) {
1839                 if (power == samples[i].power) {
1840                         *new_index = samples[i].gain_index;
1841                         return 0;
1842                 }
1843         }
1844
1845         if (power > samples[1].power) {
1846                 index0 = 0;
1847                 index1 = 1;
1848         } else if (power > samples[2].power) {
1849                 index0 = 1;
1850                 index1 = 2;
1851         } else if (power > samples[3].power) {
1852                 index0 = 2;
1853                 index1 = 3;
1854         } else {
1855                 index0 = 3;
1856                 index1 = 4;
1857         }
1858
1859         denominator = (s32) samples[index1].power - (s32) samples[index0].power;
1860         if (denominator == 0)
1861                 return -EINVAL;
1862         gains0 = (s32) samples[index0].gain_index * (1 << 19);
1863         gains1 = (s32) samples[index1].gain_index * (1 << 19);
1864         res = gains0 + (gains1 - gains0) *
1865             ((s32) power - (s32) samples[index0].power) / denominator +
1866             (1 << 18);
1867         *new_index = res >> 19;
1868         return 0;
1869 }
1870
1871 static void iwl3945_hw_reg_init_channel_groups(struct iwl3945_priv *priv)
1872 {
1873         u32 i;
1874         s32 rate_index;
1875         const struct iwl3945_eeprom_txpower_group *group;
1876
1877         IWL_DEBUG_POWER("Initializing factory calib info from EEPROM\n");
1878
1879         for (i = 0; i < IWL_NUM_TX_CALIB_GROUPS; i++) {
1880                 s8 *clip_pwrs;  /* table of power levels for each rate */
1881                 s8 satur_pwr;   /* saturation power for each chnl group */
1882                 group = &priv->eeprom.groups[i];
1883
1884                 /* sanity check on factory saturation power value */
1885                 if (group->saturation_power < 40) {
1886                         IWL_WARNING("Error: saturation power is %d, "
1887                                     "less than minimum expected 40\n",
1888                                     group->saturation_power);
1889                         return;
1890                 }
1891
1892                 /*
1893                  * Derive requested power levels for each rate, based on
1894                  *   hardware capabilities (saturation power for band).
1895                  * Basic value is 3dB down from saturation, with further
1896                  *   power reductions for highest 3 data rates.  These
1897                  *   backoffs provide headroom for high rate modulation
1898                  *   power peaks, without too much distortion (clipping).
1899                  */
1900                 /* we'll fill in this array with h/w max power levels */
1901                 clip_pwrs = (s8 *) priv->clip_groups[i].clip_powers;
1902
1903                 /* divide factory saturation power by 2 to find -3dB level */
1904                 satur_pwr = (s8) (group->saturation_power >> 1);
1905
1906                 /* fill in channel group's nominal powers for each rate */
1907                 for (rate_index = 0;
1908                      rate_index < IWL_RATE_COUNT; rate_index++, clip_pwrs++) {
1909                         switch (rate_index) {
1910                         case IWL_RATE_36M_INDEX_TABLE:
1911                                 if (i == 0)     /* B/G */
1912                                         *clip_pwrs = satur_pwr;
1913                                 else    /* A */
1914                                         *clip_pwrs = satur_pwr - 5;
1915                                 break;
1916                         case IWL_RATE_48M_INDEX_TABLE:
1917                                 if (i == 0)
1918                                         *clip_pwrs = satur_pwr - 7;
1919                                 else
1920                                         *clip_pwrs = satur_pwr - 10;
1921                                 break;
1922                         case IWL_RATE_54M_INDEX_TABLE:
1923                                 if (i == 0)
1924                                         *clip_pwrs = satur_pwr - 9;
1925                                 else
1926                                         *clip_pwrs = satur_pwr - 12;
1927                                 break;
1928                         default:
1929                                 *clip_pwrs = satur_pwr;
1930                                 break;
1931                         }
1932                 }
1933         }
1934 }
1935
1936 /**
1937  * iwl3945_txpower_set_from_eeprom - Set channel power info based on EEPROM
1938  *
1939  * Second pass (during init) to set up priv->channel_info
1940  *
1941  * Set up Tx-power settings in our channel info database for each VALID
1942  * (for this geo/SKU) channel, at all Tx data rates, based on eeprom values
1943  * and current temperature.
1944  *
1945  * Since this is based on current temperature (at init time), these values may
1946  * not be valid for very long, but it gives us a starting/default point,
1947  * and allows us to active (i.e. using Tx) scan.
1948  *
1949  * This does *not* write values to NIC, just sets up our internal table.
1950  */
1951 int iwl3945_txpower_set_from_eeprom(struct iwl3945_priv *priv)
1952 {
1953         struct iwl3945_channel_info *ch_info = NULL;
1954         struct iwl3945_channel_power_info *pwr_info;
1955         int delta_index;
1956         u8 rate_index;
1957         u8 scan_tbl_index;
1958         const s8 *clip_pwrs;    /* array of power levels for each rate */
1959         u8 gain, dsp_atten;
1960         s8 power;
1961         u8 pwr_index, base_pwr_index, a_band;
1962         u8 i;
1963         int temperature;
1964
1965         /* save temperature reference,
1966          *   so we can determine next time to calibrate */
1967         temperature = iwl3945_hw_reg_txpower_get_temperature(priv);
1968         priv->last_temperature = temperature;
1969
1970         iwl3945_hw_reg_init_channel_groups(priv);
1971
1972         /* initialize Tx power info for each and every channel, 2.4 and 5.x */
1973         for (i = 0, ch_info = priv->channel_info; i < priv->channel_count;
1974              i++, ch_info++) {
1975                 a_band = is_channel_a_band(ch_info);
1976                 if (!is_channel_valid(ch_info))
1977                         continue;
1978
1979                 /* find this channel's channel group (*not* "band") index */
1980                 ch_info->group_index =
1981                         iwl3945_hw_reg_get_ch_grp_index(priv, ch_info);
1982
1983                 /* Get this chnlgrp's rate->max/clip-powers table */
1984                 clip_pwrs = priv->clip_groups[ch_info->group_index].clip_powers;
1985
1986                 /* calculate power index *adjustment* value according to
1987                  *  diff between current temperature and factory temperature */
1988                 delta_index = iwl3945_hw_reg_adjust_power_by_temp(temperature,
1989                                 priv->eeprom.groups[ch_info->group_index].
1990                                 temperature);
1991
1992                 IWL_DEBUG_POWER("Delta index for channel %d: %d [%d]\n",
1993                                 ch_info->channel, delta_index, temperature +
1994                                 IWL_TEMP_CONVERT);
1995
1996                 /* set tx power value for all OFDM rates */
1997                 for (rate_index = 0; rate_index < IWL_OFDM_RATES;
1998                      rate_index++) {
1999                         s32 power_idx;
2000                         int rc;
2001
2002                         /* use channel group's clip-power table,
2003                          *   but don't exceed channel's max power */
2004                         s8 pwr = min(ch_info->max_power_avg,
2005                                      clip_pwrs[rate_index]);
2006
2007                         pwr_info = &ch_info->power_info[rate_index];
2008
2009                         /* get base (i.e. at factory-measured temperature)
2010                          *    power table index for this rate's power */
2011                         rc = iwl3945_hw_reg_get_matched_power_index(priv, pwr,
2012                                                          ch_info->group_index,
2013                                                          &power_idx);
2014                         if (rc) {
2015                                 IWL_ERROR("Invalid power index\n");
2016                                 return rc;
2017                         }
2018                         pwr_info->base_power_index = (u8) power_idx;
2019
2020                         /* temperature compensate */
2021                         power_idx += delta_index;
2022
2023                         /* stay within range of gain table */
2024                         power_idx = iwl3945_hw_reg_fix_power_index(power_idx);
2025
2026                         /* fill 1 OFDM rate's iwl3945_channel_power_info struct */
2027                         pwr_info->requested_power = pwr;
2028                         pwr_info->power_table_index = (u8) power_idx;
2029                         pwr_info->tpc.tx_gain =
2030                             power_gain_table[a_band][power_idx].tx_gain;
2031                         pwr_info->tpc.dsp_atten =
2032                             power_gain_table[a_band][power_idx].dsp_atten;
2033                 }
2034
2035                 /* set tx power for CCK rates, based on OFDM 12 Mbit settings*/
2036                 pwr_info = &ch_info->power_info[IWL_RATE_12M_INDEX_TABLE];
2037                 power = pwr_info->requested_power +
2038                         IWL_CCK_FROM_OFDM_POWER_DIFF;
2039                 pwr_index = pwr_info->power_table_index +
2040                         IWL_CCK_FROM_OFDM_INDEX_DIFF;
2041                 base_pwr_index = pwr_info->base_power_index +
2042                         IWL_CCK_FROM_OFDM_INDEX_DIFF;
2043
2044                 /* stay within table range */
2045                 pwr_index = iwl3945_hw_reg_fix_power_index(pwr_index);
2046                 gain = power_gain_table[a_band][pwr_index].tx_gain;
2047                 dsp_atten = power_gain_table[a_band][pwr_index].dsp_atten;
2048
2049                 /* fill each CCK rate's iwl3945_channel_power_info structure
2050                  * NOTE:  All CCK-rate Txpwrs are the same for a given chnl!
2051                  * NOTE:  CCK rates start at end of OFDM rates! */
2052                 for (rate_index = 0;
2053                      rate_index < IWL_CCK_RATES; rate_index++) {
2054                         pwr_info = &ch_info->power_info[rate_index+IWL_OFDM_RATES];
2055                         pwr_info->requested_power = power;
2056                         pwr_info->power_table_index = pwr_index;
2057                         pwr_info->base_power_index = base_pwr_index;
2058                         pwr_info->tpc.tx_gain = gain;
2059                         pwr_info->tpc.dsp_atten = dsp_atten;
2060                 }
2061
2062                 /* set scan tx power, 1Mbit for CCK, 6Mbit for OFDM */
2063                 for (scan_tbl_index = 0;
2064                      scan_tbl_index < IWL_NUM_SCAN_RATES; scan_tbl_index++) {
2065                         s32 actual_index = (scan_tbl_index == 0) ?
2066                                 IWL_RATE_1M_INDEX_TABLE : IWL_RATE_6M_INDEX_TABLE;
2067                         iwl3945_hw_reg_set_scan_power(priv, scan_tbl_index,
2068                                 actual_index, clip_pwrs, ch_info, a_band);
2069                 }
2070         }
2071
2072         return 0;
2073 }
2074
2075 int iwl3945_hw_rxq_stop(struct iwl3945_priv *priv)
2076 {
2077         int rc;
2078         unsigned long flags;
2079
2080         spin_lock_irqsave(&priv->lock, flags);
2081         rc = iwl3945_grab_nic_access(priv);
2082         if (rc) {
2083                 spin_unlock_irqrestore(&priv->lock, flags);
2084                 return rc;
2085         }
2086
2087         iwl3945_write_direct32(priv, FH_RCSR_CONFIG(0), 0);
2088         rc = iwl3945_poll_direct_bit(priv, FH_RSSR_STATUS, (1 << 24), 1000);
2089         if (rc < 0)
2090                 IWL_ERROR("Can't stop Rx DMA.\n");
2091
2092         iwl3945_release_nic_access(priv);
2093         spin_unlock_irqrestore(&priv->lock, flags);
2094
2095         return 0;
2096 }
2097
2098 int iwl3945_hw_tx_queue_init(struct iwl3945_priv *priv, struct iwl3945_tx_queue *txq)
2099 {
2100         int rc;
2101         unsigned long flags;
2102         int txq_id = txq->q.id;
2103
2104         struct iwl3945_shared *shared_data = priv->hw_setting.shared_virt;
2105
2106         shared_data->tx_base_ptr[txq_id] = cpu_to_le32((u32)txq->q.dma_addr);
2107
2108         spin_lock_irqsave(&priv->lock, flags);
2109         rc = iwl3945_grab_nic_access(priv);
2110         if (rc) {
2111                 spin_unlock_irqrestore(&priv->lock, flags);
2112                 return rc;
2113         }
2114         iwl3945_write_direct32(priv, FH_CBCC_CTRL(txq_id), 0);
2115         iwl3945_write_direct32(priv, FH_CBCC_BASE(txq_id), 0);
2116
2117         iwl3945_write_direct32(priv, FH_TCSR_CONFIG(txq_id),
2118                 ALM_FH_TCSR_TX_CONFIG_REG_VAL_CIRQ_RTC_NOINT |
2119                 ALM_FH_TCSR_TX_CONFIG_REG_VAL_MSG_MODE_TXF |
2120                 ALM_FH_TCSR_TX_CONFIG_REG_VAL_CIRQ_HOST_IFTFD |
2121                 ALM_FH_TCSR_TX_CONFIG_REG_VAL_DMA_CREDIT_ENABLE_VAL |
2122                 ALM_FH_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_ENABLE);
2123         iwl3945_release_nic_access(priv);
2124
2125         /* fake read to flush all prev. writes */
2126         iwl3945_read32(priv, FH_TSSR_CBB_BASE);
2127         spin_unlock_irqrestore(&priv->lock, flags);
2128
2129         return 0;
2130 }
2131
2132 int iwl3945_hw_get_rx_read(struct iwl3945_priv *priv)
2133 {
2134         struct iwl3945_shared *shared_data = priv->hw_setting.shared_virt;
2135
2136         return le32_to_cpu(shared_data->rx_read_ptr[0]);
2137 }
2138
2139 /**
2140  * iwl3945_init_hw_rate_table - Initialize the hardware rate fallback table
2141  */
2142 int iwl3945_init_hw_rate_table(struct iwl3945_priv *priv)
2143 {
2144         int rc, i, index, prev_index;
2145         struct iwl3945_rate_scaling_cmd rate_cmd = {
2146                 .reserved = {0, 0, 0},
2147         };
2148         struct iwl3945_rate_scaling_info *table = rate_cmd.table;
2149
2150         for (i = 0; i < ARRAY_SIZE(iwl3945_rates); i++) {
2151                 index = iwl3945_rates[i].table_rs_index;
2152
2153                 table[index].rate_n_flags =
2154                         iwl3945_hw_set_rate_n_flags(iwl3945_rates[i].plcp, 0);
2155                 table[index].try_cnt = priv->retry_rate;
2156                 prev_index = iwl3945_get_prev_ieee_rate(i);
2157                 table[index].next_rate_index = iwl3945_rates[prev_index].table_rs_index;
2158         }
2159
2160         switch (priv->phymode) {
2161         case MODE_IEEE80211A:
2162                 IWL_DEBUG_RATE("Select A mode rate scale\n");
2163                 /* If one of the following CCK rates is used,
2164                  * have it fall back to the 6M OFDM rate */
2165                 for (i = IWL_RATE_1M_INDEX_TABLE; i <= IWL_RATE_11M_INDEX_TABLE; i++)
2166                         table[i].next_rate_index = iwl3945_rates[IWL_FIRST_OFDM_RATE].table_rs_index;
2167
2168                 /* Don't fall back to CCK rates */
2169                 table[IWL_RATE_12M_INDEX_TABLE].next_rate_index = IWL_RATE_9M_INDEX_TABLE;
2170
2171                 /* Don't drop out of OFDM rates */
2172                 table[IWL_RATE_6M_INDEX_TABLE].next_rate_index =
2173                     iwl3945_rates[IWL_FIRST_OFDM_RATE].table_rs_index;
2174                 break;
2175
2176         case MODE_IEEE80211B:
2177                 IWL_DEBUG_RATE("Select B mode rate scale\n");
2178                 /* If an OFDM rate is used, have it fall back to the
2179                  * 1M CCK rates */
2180                 for (i = IWL_RATE_6M_INDEX_TABLE; i <= IWL_RATE_54M_INDEX_TABLE; i++)
2181                         table[i].next_rate_index = iwl3945_rates[IWL_FIRST_CCK_RATE].table_rs_index;
2182
2183                 /* CCK shouldn't fall back to OFDM... */
2184                 table[IWL_RATE_11M_INDEX_TABLE].next_rate_index = IWL_RATE_5M_INDEX_TABLE;
2185                 break;
2186
2187         default:
2188                 IWL_DEBUG_RATE("Select G mode rate scale\n");
2189                 break;
2190         }
2191
2192         /* Update the rate scaling for control frame Tx */
2193         rate_cmd.table_id = 0;
2194         rc = iwl3945_send_cmd_pdu(priv, REPLY_RATE_SCALE, sizeof(rate_cmd),
2195                               &rate_cmd);
2196         if (rc)
2197                 return rc;
2198
2199         /* Update the rate scaling for data frame Tx */
2200         rate_cmd.table_id = 1;
2201         return iwl3945_send_cmd_pdu(priv, REPLY_RATE_SCALE, sizeof(rate_cmd),
2202                                 &rate_cmd);
2203 }
2204
2205 /* Called when initializing driver */
2206 int iwl3945_hw_set_hw_setting(struct iwl3945_priv *priv)
2207 {
2208         memset((void *)&priv->hw_setting, 0,
2209                sizeof(struct iwl3945_driver_hw_info));
2210
2211         priv->hw_setting.shared_virt =
2212             pci_alloc_consistent(priv->pci_dev,
2213                                  sizeof(struct iwl3945_shared),
2214                                  &priv->hw_setting.shared_phys);
2215
2216         if (!priv->hw_setting.shared_virt) {
2217                 IWL_ERROR("failed to allocate pci memory\n");
2218                 mutex_unlock(&priv->mutex);
2219                 return -ENOMEM;
2220         }
2221
2222         priv->hw_setting.ac_queue_count = AC_NUM;
2223         priv->hw_setting.rx_buffer_size = IWL_RX_BUF_SIZE;
2224         priv->hw_setting.tx_cmd_len = sizeof(struct iwl3945_tx_cmd);
2225         priv->hw_setting.max_rxq_size = RX_QUEUE_SIZE;
2226         priv->hw_setting.max_rxq_log = RX_QUEUE_SIZE_LOG;
2227         priv->hw_setting.max_stations = IWL3945_STATION_COUNT;
2228         priv->hw_setting.bcast_sta_id = IWL3945_BROADCAST_ID;
2229         return 0;
2230 }
2231
2232 unsigned int iwl3945_hw_get_beacon_cmd(struct iwl3945_priv *priv,
2233                           struct iwl3945_frame *frame, u8 rate)
2234 {
2235         struct iwl3945_tx_beacon_cmd *tx_beacon_cmd;
2236         unsigned int frame_size;
2237
2238         tx_beacon_cmd = (struct iwl3945_tx_beacon_cmd *)&frame->u;
2239         memset(tx_beacon_cmd, 0, sizeof(*tx_beacon_cmd));
2240
2241         tx_beacon_cmd->tx.sta_id = IWL3945_BROADCAST_ID;
2242         tx_beacon_cmd->tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2243
2244         frame_size = iwl3945_fill_beacon_frame(priv,
2245                                 tx_beacon_cmd->frame,
2246                                 iwl3945_broadcast_addr,
2247                                 sizeof(frame->u) - sizeof(*tx_beacon_cmd));
2248
2249         BUG_ON(frame_size > MAX_MPDU_SIZE);
2250         tx_beacon_cmd->tx.len = cpu_to_le16((u16)frame_size);
2251
2252         tx_beacon_cmd->tx.rate = rate;
2253         tx_beacon_cmd->tx.tx_flags = (TX_CMD_FLG_SEQ_CTL_MSK |
2254                                       TX_CMD_FLG_TSF_MSK);
2255
2256         /* supp_rates[0] == OFDM start at IWL_FIRST_OFDM_RATE*/
2257         tx_beacon_cmd->tx.supp_rates[0] =
2258                 (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
2259
2260         tx_beacon_cmd->tx.supp_rates[1] =
2261                 (IWL_CCK_BASIC_RATES_MASK & 0xF);
2262
2263         return (sizeof(struct iwl3945_tx_beacon_cmd) + frame_size);
2264 }
2265
2266 void iwl3945_hw_rx_handler_setup(struct iwl3945_priv *priv)
2267 {
2268         priv->rx_handlers[REPLY_3945_RX] = iwl3945_rx_reply_rx;
2269 }
2270
2271 void iwl3945_hw_setup_deferred_work(struct iwl3945_priv *priv)
2272 {
2273         INIT_DELAYED_WORK(&priv->thermal_periodic,
2274                           iwl3945_bg_reg_txpower_periodic);
2275 }
2276
2277 void iwl3945_hw_cancel_deferred_work(struct iwl3945_priv *priv)
2278 {
2279         cancel_delayed_work(&priv->thermal_periodic);
2280 }
2281
2282 struct pci_device_id iwl3945_hw_card_ids[] = {
2283         {PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x4222)},
2284         {PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x4227)},
2285         {0}
2286 };
2287
2288 /*
2289  * Clear the OWNER_MSK, to establish driver (instead of uCode running on
2290  * embedded controller) as EEPROM reader; each read is a series of pulses
2291  * to/from the EEPROM chip, not a single event, so even reads could conflict
2292  * if they weren't arbitrated by some ownership mechanism.  Here, the driver
2293  * simply claims ownership, which should be safe when this function is called
2294  * (i.e. before loading uCode!).
2295  */
2296 inline int iwl3945_eeprom_acquire_semaphore(struct iwl3945_priv *priv)
2297 {
2298         _iwl3945_clear_bit(priv, CSR_EEPROM_GP, CSR_EEPROM_GP_IF_OWNER_MSK);
2299         return 0;
2300 }
2301
2302 MODULE_DEVICE_TABLE(pci, iwl3945_hw_card_ids);