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 <linux/etherdevice.h>
  39 #include <asm/unaligned.h>
  40 #include <net/mac80211.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 void iwl3945_add_radiotap(struct iwl3945_priv *priv, struct sk_buff *skb,
 242                           struct iwl3945_rx_frame_hdr *rx_hdr,
 243                           struct ieee80211_rx_status *stats)
 244 {
 245         /* First cache any information we need before we overwrite
 246          * the information provided in the skb from the hardware */
 247         s8 signal = stats->ssi;
 248         s8 noise = 0;
 249         int rate = stats->rate;
 250         u64 tsf = stats->mactime;
 251         __le16 phy_flags_hw = rx_hdr->phy_flags;
 252
 253         struct iwl3945_rt_rx_hdr {
 254                 struct ieee80211_radiotap_header rt_hdr;
 255                 __le64 rt_tsf;          /* TSF */
 256                 u8 rt_flags;            /* radiotap packet flags */
 257                 u8 rt_rate;             /* rate in 500kb/s */
 258                 __le16 rt_channelMHz;   /* channel in MHz */
 259                 __le16 rt_chbitmask;    /* channel bitfield */
 260                 s8 rt_dbmsignal;        /* signal in dBm, kluged to signed */
 261                 s8 rt_dbmnoise;
 262                 u8 rt_antenna;          /* antenna number */
 263         } __attribute__ ((packed)) *iwl3945_rt;
 264
 265         if (skb_headroom(skb) < sizeof(*iwl3945_rt)) {
 266                 if (net_ratelimit())
 267                         printk(KERN_ERR "not enough headroom [%d] for "
 268                                "radiotap head [%d]\n",
 269                                skb_headroom(skb), sizeof(*iwl3945_rt));
 270                 return;
 271         }
 272
 273         /* put radiotap header in front of 802.11 header and data */
 274         iwl3945_rt = (void *)skb_push(skb, sizeof(*iwl3945_rt));
 275
 276         /* initialise radiotap header */
 277         iwl3945_rt->rt_hdr.it_version = PKTHDR_RADIOTAP_VERSION;
 278         iwl3945_rt->rt_hdr.it_pad = 0;
 279
 280         /* total header + data */
 281         put_unaligned(cpu_to_le16(sizeof(*iwl3945_rt)),
 282                       &iwl3945_rt->rt_hdr.it_len);
 283
 284         /* Indicate all the fields we add to the radiotap header */
 285         put_unaligned(cpu_to_le32((1 << IEEE80211_RADIOTAP_TSFT) |
 286                                   (1 << IEEE80211_RADIOTAP_FLAGS) |
 287                                   (1 << IEEE80211_RADIOTAP_RATE) |
 288                                   (1 << IEEE80211_RADIOTAP_CHANNEL) |
 289                                   (1 << IEEE80211_RADIOTAP_DBM_ANTSIGNAL) |
 290                                   (1 << IEEE80211_RADIOTAP_DBM_ANTNOISE) |
 291                                   (1 << IEEE80211_RADIOTAP_ANTENNA)),
 292                       &iwl3945_rt->rt_hdr.it_present);
 293
 294         /* Zero the flags, we'll add to them as we go */
 295         iwl3945_rt->rt_flags = 0;
 296
 297         put_unaligned(cpu_to_le64(tsf), &iwl3945_rt->rt_tsf);
 298
 299         iwl3945_rt->rt_dbmsignal = signal;
 300         iwl3945_rt->rt_dbmnoise = noise;
 301
 302         /* Convert the channel frequency and set the flags */
 303         put_unaligned(cpu_to_le16(stats->freq), &iwl3945_rt->rt_channelMHz);
 304         if (!(phy_flags_hw & RX_RES_PHY_FLAGS_BAND_24_MSK))
 305                 put_unaligned(cpu_to_le16(IEEE80211_CHAN_OFDM |
 306                                           IEEE80211_CHAN_5GHZ),
 307                               &iwl3945_rt->rt_chbitmask);
 308         else if (phy_flags_hw & RX_RES_PHY_FLAGS_MOD_CCK_MSK)
 309                 put_unaligned(cpu_to_le16(IEEE80211_CHAN_CCK |
 310                                           IEEE80211_CHAN_2GHZ),
 311                               &iwl3945_rt->rt_chbitmask);
 312         else    /* 802.11g */
 313                 put_unaligned(cpu_to_le16(IEEE80211_CHAN_OFDM |
 314                                           IEEE80211_CHAN_2GHZ),
 315                               &iwl3945_rt->rt_chbitmask);
 316
 317         rate = iwl3945_rate_index_from_plcp(rate);
 318         if (rate == -1)
 319                 iwl3945_rt->rt_rate = 0;
 320         else
 321                 iwl3945_rt->rt_rate = iwl3945_rates[rate].ieee;
 322
 323         /* antenna number */
 324         iwl3945_rt->rt_antenna =
 325                 le16_to_cpu(phy_flags_hw & RX_RES_PHY_FLAGS_ANTENNA_MSK) >> 4;
 326
 327         /* set the preamble flag if we have it */
 328         if (phy_flags_hw & RX_RES_PHY_FLAGS_SHORT_PREAMBLE_MSK)
 329                 iwl3945_rt->rt_flags |= IEEE80211_RADIOTAP_F_SHORTPRE;
 330
 331         stats->flag |= RX_FLAG_RADIOTAP;
 332 }
 333
 334 static void iwl3945_handle_data_packet(struct iwl3945_priv *priv, int is_data,
 335                                    struct iwl3945_rx_mem_buffer *rxb,
 336                                    struct ieee80211_rx_status *stats)
 337 {
 338         struct ieee80211_hdr *hdr;
 339         struct iwl3945_rx_packet *pkt = (struct iwl3945_rx_packet *)rxb->skb->data;
 340         struct iwl3945_rx_frame_hdr *rx_hdr = IWL_RX_HDR(pkt);
 341         struct iwl3945_rx_frame_end *rx_end = IWL_RX_END(pkt);
 342         short len = le16_to_cpu(rx_hdr->len);
 343
 344         /* We received data from the HW, so stop the watchdog */
 345         if (unlikely((len + IWL_RX_FRAME_SIZE) > skb_tailroom(rxb->skb))) {
 346                 IWL_DEBUG_DROP("Corruption detected!\n");
 347                 return;
 348         }
 349
 350         /* We only process data packets if the interface is open */
 351         if (unlikely(!priv->is_open)) {
 352                 IWL_DEBUG_DROP_LIMIT
 353                     ("Dropping packet while interface is not open.\n");
 354                 return;
 355         }
 356
 357         skb_reserve(rxb->skb, (void *)rx_hdr->payload - (void *)pkt);
 358         /* Set the size of the skb to the size of the frame */
 359         skb_put(rxb->skb, le16_to_cpu(rx_hdr->len));
 360
 361         hdr = (void *)rxb->skb->data;
 362
 363         if (iwl3945_param_hwcrypto)
 364                 iwl3945_set_decrypted_flag(priv, rxb->skb,
 365                                        le32_to_cpu(rx_end->status), stats);
 366
 367         if (priv->add_radiotap)
 368                 iwl3945_add_radiotap(priv, rxb->skb, rx_hdr, stats);
 369
 370         ieee80211_rx_irqsafe(priv->hw, rxb->skb, stats);
 371         rxb->skb = NULL;
 372 }
 373
 374 #define IWL_DELAY_NEXT_SCAN_AFTER_ASSOC (HZ*6)
 375
 376 static void iwl3945_rx_reply_rx(struct iwl3945_priv *priv,
 377                                 struct iwl3945_rx_mem_buffer *rxb)
 378 {
 379         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
 380         struct iwl3945_rx_frame_stats *rx_stats = IWL_RX_STATS(pkt);
 381         struct iwl3945_rx_frame_hdr *rx_hdr = IWL_RX_HDR(pkt);
 382         struct iwl3945_rx_frame_end *rx_end = IWL_RX_END(pkt);
 383         struct ieee80211_hdr *header;
 384         u16 rx_stats_sig_avg = le16_to_cpu(rx_stats->sig_avg);
 385         u16 rx_stats_noise_diff = le16_to_cpu(rx_stats->noise_diff);
 386         struct ieee80211_rx_status stats = {
 387                 .mactime = le64_to_cpu(rx_end->timestamp),
 388                 .freq = ieee80211chan2mhz(le16_to_cpu(rx_hdr->channel)),
 389                 .channel = le16_to_cpu(rx_hdr->channel),
 390                 .phymode = (rx_hdr->phy_flags & RX_RES_PHY_FLAGS_BAND_24_MSK) ?
 391                 MODE_IEEE80211G : MODE_IEEE80211A,
 392                 .antenna = 0,
 393                 .rate = rx_hdr->rate,
 394                 .flag = 0,
 395         };
 396         u8 network_packet;
 397         int snr;
 398
 399         if ((unlikely(rx_stats->phy_count > 20))) {
 400                 IWL_DEBUG_DROP
 401                     ("dsp size out of range [0,20]: "
 402                      "%d/n", rx_stats->phy_count);
 403                 return;
 404         }
 405
 406         if (!(rx_end->status & RX_RES_STATUS_NO_CRC32_ERROR)
 407             || !(rx_end->status & RX_RES_STATUS_NO_RXE_OVERFLOW)) {
 408                 IWL_DEBUG_RX("Bad CRC or FIFO: 0x%08X.\n", rx_end->status);
 409                 return;
 410         }
 411
 412         if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR) {
 413                 iwl3945_handle_data_packet(priv, 1, rxb, &stats);
 414                 return;
 415         }
 416
 417         /* Convert 3945's rssi indicator to dBm */
 418         stats.ssi = rx_stats->rssi - IWL_RSSI_OFFSET;
 419
 420         /* Set default noise value to -127 */
 421         if (priv->last_rx_noise == 0)
 422                 priv->last_rx_noise = IWL_NOISE_MEAS_NOT_AVAILABLE;
 423
 424         /* 3945 provides noise info for OFDM frames only.
 425          * sig_avg and noise_diff are measured by the 3945's digital signal
 426          *   processor (DSP), and indicate linear levels of signal level and
 427          *   distortion/noise within the packet preamble after
 428          *   automatic gain control (AGC).  sig_avg should stay fairly
 429          *   constant if the radio's AGC is working well.
 430          * Since these values are linear (not dB or dBm), linear
 431          *   signal-to-noise ratio (SNR) is (sig_avg / noise_diff).
 432          * Convert linear SNR to dB SNR, then subtract that from rssi dBm
 433          *   to obtain noise level in dBm.
 434          * Calculate stats.signal (quality indicator in %) based on SNR. */
 435         if (rx_stats_noise_diff) {
 436                 snr = rx_stats_sig_avg / rx_stats_noise_diff;
 437                 stats.noise = stats.ssi - iwl3945_calc_db_from_ratio(snr);
 438                 stats.signal = iwl3945_calc_sig_qual(stats.ssi, stats.noise);
 439
 440         /* If noise info not available, calculate signal quality indicator (%)
 441          *   using just the dBm signal level. */
 442         } else {
 443                 stats.noise = priv->last_rx_noise;
 444                 stats.signal = iwl3945_calc_sig_qual(stats.ssi, 0);
 445         }
 446
 447
 448         IWL_DEBUG_STATS("Rssi %d noise %d qual %d sig_avg %d noise_diff %d\n",
 449                         stats.ssi, stats.noise, stats.signal,
 450                         rx_stats_sig_avg, rx_stats_noise_diff);
 451
 452         stats.freq = ieee80211chan2mhz(stats.channel);
 453
 454         /* can be covered by iwl3945_report_frame() in most cases */
 455 /*      IWL_DEBUG_RX("RX status: 0x%08X\n", rx_end->status); */
 456
 457         header = (struct ieee80211_hdr *)IWL_RX_DATA(pkt);
 458
 459         network_packet = iwl3945_is_network_packet(priv, header);
 460
 461 #ifdef CONFIG_IWL3945_DEBUG
 462         if (iwl3945_debug_level & IWL_DL_STATS && net_ratelimit())
 463                 IWL_DEBUG_STATS
 464                     ("[%c] %d RSSI: %d Signal: %u, Noise: %u, Rate: %u\n",
 465                      network_packet ? '*' : ' ',
 466                      stats.channel, stats.ssi, stats.ssi,
 467                      stats.ssi, stats.rate);
 468
 469         if (iwl3945_debug_level & (IWL_DL_RX))
 470                 /* Set "1" to report good data frames in groups of 100 */
 471                 iwl3945_report_frame(priv, pkt, header, 1);
 472 #endif
 473
 474         if (network_packet) {
 475                 priv->last_beacon_time = le32_to_cpu(rx_end->beacon_timestamp);
 476                 priv->last_tsf = le64_to_cpu(rx_end->timestamp);
 477                 priv->last_rx_rssi = stats.ssi;
 478                 priv->last_rx_noise = stats.noise;
 479         }
 480
 481         switch (le16_to_cpu(header->frame_control) & IEEE80211_FCTL_FTYPE) {
 482         case IEEE80211_FTYPE_MGMT:
 483                 switch (le16_to_cpu(header->frame_control) &
 484                         IEEE80211_FCTL_STYPE) {
 485                 case IEEE80211_STYPE_PROBE_RESP:
 486                 case IEEE80211_STYPE_BEACON:{
 487                                 /* If this is a beacon or probe response for
 488                                  * our network then cache the beacon
 489                                  * timestamp */
 490                                 if ((((priv->iw_mode == IEEE80211_IF_TYPE_STA)
 491                                       && !compare_ether_addr(header->addr2,
 492                                                              priv->bssid)) ||
 493                                      ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
 494                                       && !compare_ether_addr(header->addr3,
 495                                                              priv->bssid)))) {
 496                                         struct ieee80211_mgmt *mgmt =
 497                                             (struct ieee80211_mgmt *)header;
 498                                         __le32 *pos;
 499                                         pos =
 500                                             (__le32 *) & mgmt->u.beacon.
 501                                             timestamp;
 502                                         priv->timestamp0 = le32_to_cpu(pos[0]);
 503                                         priv->timestamp1 = le32_to_cpu(pos[1]);
 504                                         priv->beacon_int = le16_to_cpu(
 505                                             mgmt->u.beacon.beacon_int);
 506                                         if (priv->call_post_assoc_from_beacon &&
 507                                             (priv->iw_mode ==
 508                                                 IEEE80211_IF_TYPE_STA))
 509                                                 queue_work(priv->workqueue,
 510                                                     &priv->post_associate.work);
 511
 512                                         priv->call_post_assoc_from_beacon = 0;
 513                                 }
 514
 515                                 break;
 516                         }
 517
 518                 case IEEE80211_STYPE_ACTION:
 519                         /* TODO: Parse 802.11h frames for CSA... */
 520                         break;
 521
 522                         /*
 523                          * TODO: There is no callback function from upper
 524                          * stack to inform us when associated status. this
 525                          * work around to sniff assoc_resp management frame
 526                          * and finish the association process.
 527                          */
 528                 case IEEE80211_STYPE_ASSOC_RESP:
 529                 case IEEE80211_STYPE_REASSOC_RESP:{
 530                                 struct ieee80211_mgmt *mgnt =
 531                                     (struct ieee80211_mgmt *)header;
 532
 533                                 /* We have just associated, give some
 534                                  * time for the 4-way handshake if
 535                                  * any. Don't start scan too early. */
 536                                 priv->next_scan_jiffies = jiffies +
 537                                         IWL_DELAY_NEXT_SCAN_AFTER_ASSOC;
 538
 539                                 priv->assoc_id = (~((1 << 15) | (1 << 14)) &
 540                                                   le16_to_cpu(mgnt->u.
 541                                                               assoc_resp.aid));
 542                                 priv->assoc_capability =
 543                                     le16_to_cpu(mgnt->u.assoc_resp.capab_info);
 544                                 if (priv->beacon_int)
 545                                         queue_work(priv->workqueue,
 546                                             &priv->post_associate.work);
 547                                 else
 548                                         priv->call_post_assoc_from_beacon = 1;
 549                                 break;
 550                         }
 551
 552                 case IEEE80211_STYPE_PROBE_REQ:{
 553                                 DECLARE_MAC_BUF(mac1);
 554                                 DECLARE_MAC_BUF(mac2);
 555                                 DECLARE_MAC_BUF(mac3);
 556                                 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
 557                                         IWL_DEBUG_DROP
 558                                             ("Dropping (non network): %s"
 559                                              ", %s, %s\n",
 560                                              print_mac(mac1, header->addr1),
 561                                              print_mac(mac2, header->addr2),
 562                                              print_mac(mac3, header->addr3));
 563                                 return;
 564                         }
 565                 }
 566
 567                 iwl3945_handle_data_packet(priv, 0, rxb, &stats);
 568                 break;
 569
 570         case IEEE80211_FTYPE_CTL:
 571                 break;
 572
 573         case IEEE80211_FTYPE_DATA: {
 574                 DECLARE_MAC_BUF(mac1);
 575                 DECLARE_MAC_BUF(mac2);
 576                 DECLARE_MAC_BUF(mac3);
 577
 578                 if (unlikely(iwl3945_is_duplicate_packet(priv, header)))
 579                         IWL_DEBUG_DROP("Dropping (dup): %s, %s, %s\n",
 580                                        print_mac(mac1, header->addr1),
 581                                        print_mac(mac2, header->addr2),
 582                                        print_mac(mac3, header->addr3));
 583                 else
 584                         iwl3945_handle_data_packet(priv, 1, rxb, &stats);
 585                 break;
 586         }
 587         }
 588 }
 589
 590 int iwl3945_hw_txq_attach_buf_to_tfd(struct iwl3945_priv *priv, void *ptr,
 591                                  dma_addr_t addr, u16 len)
 592 {
 593         int count;
 594         u32 pad;
 595         struct iwl3945_tfd_frame *tfd = (struct iwl3945_tfd_frame *)ptr;
 596
 597         count = TFD_CTL_COUNT_GET(le32_to_cpu(tfd->control_flags));
 598         pad = TFD_CTL_PAD_GET(le32_to_cpu(tfd->control_flags));
 599
 600         if ((count >= NUM_TFD_CHUNKS) || (count < 0)) {
 601                 IWL_ERROR("Error can not send more than %d chunks\n",
 602                           NUM_TFD_CHUNKS);
 603                 return -EINVAL;
 604         }
 605
 606         tfd->pa[count].addr = cpu_to_le32(addr);
 607         tfd->pa[count].len = cpu_to_le32(len);
 608
 609         count++;
 610
 611         tfd->control_flags = cpu_to_le32(TFD_CTL_COUNT_SET(count) |
 612                                          TFD_CTL_PAD_SET(pad));
 613
 614         return 0;
 615 }
 616
 617 /**
 618  * iwl3945_hw_txq_free_tfd - Free one TFD, those at index [txq->q.read_ptr]
 619  *
 620  * Does NOT advance any indexes
 621  */
 622 int iwl3945_hw_txq_free_tfd(struct iwl3945_priv *priv, struct iwl3945_tx_queue *txq)
 623 {
 624         struct iwl3945_tfd_frame *bd_tmp = (struct iwl3945_tfd_frame *)&txq->bd[0];
 625         struct iwl3945_tfd_frame *bd = &bd_tmp[txq->q.read_ptr];
 626         struct pci_dev *dev = priv->pci_dev;
 627         int i;
 628         int counter;
 629
 630         /* classify bd */
 631         if (txq->q.id == IWL_CMD_QUEUE_NUM)
 632                 /* nothing to cleanup after for host commands */
 633                 return 0;
 634
 635         /* sanity check */
 636         counter = TFD_CTL_COUNT_GET(le32_to_cpu(bd->control_flags));
 637         if (counter > NUM_TFD_CHUNKS) {
 638                 IWL_ERROR("Too many chunks: %i\n", counter);
 639                 /* @todo issue fatal error, it is quite serious situation */
 640                 return 0;
 641         }
 642
 643         /* unmap chunks if any */
 644
 645         for (i = 1; i < counter; i++) {
 646                 pci_unmap_single(dev, le32_to_cpu(bd->pa[i].addr),
 647                                  le32_to_cpu(bd->pa[i].len), PCI_DMA_TODEVICE);
 648                 if (txq->txb[txq->q.read_ptr].skb[0]) {
 649                         struct sk_buff *skb = txq->txb[txq->q.read_ptr].skb[0];
 650                         if (txq->txb[txq->q.read_ptr].skb[0]) {
 651                                 /* Can be called from interrupt context */
 652                                 dev_kfree_skb_any(skb);
 653                                 txq->txb[txq->q.read_ptr].skb[0] = NULL;
 654                         }
 655                 }
 656         }
 657         return 0;
 658 }
 659
 660 u8 iwl3945_hw_find_station(struct iwl3945_priv *priv, const u8 *addr)
 661 {
 662         int i;
 663         int ret = IWL_INVALID_STATION;
 664         unsigned long flags;
 665         DECLARE_MAC_BUF(mac);
 666
 667         spin_lock_irqsave(&priv->sta_lock, flags);
 668         for (i = IWL_STA_ID; i < priv->hw_setting.max_stations; i++)
 669                 if ((priv->stations[i].used) &&
 670                     (!compare_ether_addr
 671                      (priv->stations[i].sta.sta.addr, addr))) {
 672                         ret = i;
 673                         goto out;
 674                 }
 675
 676         IWL_DEBUG_INFO("can not find STA %s (total %d)\n",
 677                        print_mac(mac, addr), priv->num_stations);
 678  out:
 679         spin_unlock_irqrestore(&priv->sta_lock, flags);
 680         return ret;
 681 }
 682
 683 /**
 684  * iwl3945_hw_build_tx_cmd_rate - Add rate portion to TX_CMD:
 685  *
 686 */
 687 void iwl3945_hw_build_tx_cmd_rate(struct iwl3945_priv *priv,
 688                               struct iwl3945_cmd *cmd,
 689                               struct ieee80211_tx_control *ctrl,
 690                               struct ieee80211_hdr *hdr, int sta_id, int tx_id)
 691 {
 692         unsigned long flags;
 693         u16 rate_index = min(ctrl->tx_rate & 0xffff, IWL_RATE_COUNT - 1);
 694         u16 rate_mask;
 695         int rate;
 696         u8 rts_retry_limit;
 697         u8 data_retry_limit;
 698         __le32 tx_flags;
 699         u16 fc = le16_to_cpu(hdr->frame_control);
 700
 701         rate = iwl3945_rates[rate_index].plcp;
 702         tx_flags = cmd->cmd.tx.tx_flags;
 703
 704         /* We need to figure out how to get the sta->supp_rates while
 705          * in this running context; perhaps encoding into ctrl->tx_rate? */
 706         rate_mask = IWL_RATES_MASK;
 707
 708         spin_lock_irqsave(&priv->sta_lock, flags);
 709
 710         priv->stations[sta_id].current_rate.rate_n_flags = rate;
 711
 712         if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) &&
 713             (sta_id != IWL3945_BROADCAST_ID) &&
 714                 (sta_id != IWL_MULTICAST_ID))
 715                 priv->stations[IWL_STA_ID].current_rate.rate_n_flags = rate;
 716
 717         spin_unlock_irqrestore(&priv->sta_lock, flags);
 718
 719         if (tx_id >= IWL_CMD_QUEUE_NUM)
 720                 rts_retry_limit = 3;
 721         else
 722                 rts_retry_limit = 7;
 723
 724         if (ieee80211_is_probe_response(fc)) {
 725                 data_retry_limit = 3;
 726                 if (data_retry_limit < rts_retry_limit)
 727                         rts_retry_limit = data_retry_limit;
 728         } else
 729                 data_retry_limit = IWL_DEFAULT_TX_RETRY;
 730
 731         if (priv->data_retry_limit != -1)
 732                 data_retry_limit = priv->data_retry_limit;
 733
 734         if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
 735                 switch (fc & IEEE80211_FCTL_STYPE) {
 736                 case IEEE80211_STYPE_AUTH:
 737                 case IEEE80211_STYPE_DEAUTH:
 738                 case IEEE80211_STYPE_ASSOC_REQ:
 739                 case IEEE80211_STYPE_REASSOC_REQ:
 740                         if (tx_flags & TX_CMD_FLG_RTS_MSK) {
 741                                 tx_flags &= ~TX_CMD_FLG_RTS_MSK;
 742                                 tx_flags |= TX_CMD_FLG_CTS_MSK;
 743                         }
 744                         break;
 745                 default:
 746                         break;
 747                 }
 748         }
 749
 750         cmd->cmd.tx.rts_retry_limit = rts_retry_limit;
 751         cmd->cmd.tx.data_retry_limit = data_retry_limit;
 752         cmd->cmd.tx.rate = rate;
 753         cmd->cmd.tx.tx_flags = tx_flags;
 754
 755         /* OFDM */
 756         cmd->cmd.tx.supp_rates[0] =
 757            ((rate_mask & IWL_OFDM_RATES_MASK) >> IWL_FIRST_OFDM_RATE) & 0xFF;
 758
 759         /* CCK */
 760         cmd->cmd.tx.supp_rates[1] = (rate_mask & 0xF);
 761
 762         IWL_DEBUG_RATE("Tx sta id: %d, rate: %d (plcp), flags: 0x%4X "
 763                        "cck/ofdm mask: 0x%x/0x%x\n", sta_id,
 764                        cmd->cmd.tx.rate, le32_to_cpu(cmd->cmd.tx.tx_flags),
 765                        cmd->cmd.tx.supp_rates[1], cmd->cmd.tx.supp_rates[0]);
 766 }
 767
 768 u8 iwl3945_sync_sta(struct iwl3945_priv *priv, int sta_id, u16 tx_rate, u8 flags)
 769 {
 770         unsigned long flags_spin;
 771         struct iwl3945_station_entry *station;
 772
 773         if (sta_id == IWL_INVALID_STATION)
 774                 return IWL_INVALID_STATION;
 775
 776         spin_lock_irqsave(&priv->sta_lock, flags_spin);
 777         station = &priv->stations[sta_id];
 778
 779         station->sta.sta.modify_mask = STA_MODIFY_TX_RATE_MSK;
 780         station->sta.rate_n_flags = cpu_to_le16(tx_rate);
 781         station->current_rate.rate_n_flags = tx_rate;
 782         station->sta.mode = STA_CONTROL_MODIFY_MSK;
 783
 784         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 785
 786         iwl3945_send_add_station(priv, &station->sta, flags);
 787         IWL_DEBUG_RATE("SCALE sync station %d to rate %d\n",
 788                         sta_id, tx_rate);
 789         return sta_id;
 790 }
 791
 792 static int iwl3945_nic_set_pwr_src(struct iwl3945_priv *priv, int pwr_max)
 793 {
 794         int rc;
 795         unsigned long flags;
 796
 797         spin_lock_irqsave(&priv->lock, flags);
 798         rc = iwl3945_grab_nic_access(priv);
 799         if (rc) {
 800                 spin_unlock_irqrestore(&priv->lock, flags);
 801                 return rc;
 802         }
 803
 804         if (!pwr_max) {
 805                 u32 val;
 806
 807                 rc = pci_read_config_dword(priv->pci_dev,
 808                                 PCI_POWER_SOURCE, &val);
 809                 if (val & PCI_CFG_PMC_PME_FROM_D3COLD_SUPPORT) {
 810                         iwl3945_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
 811                                         APMG_PS_CTRL_VAL_PWR_SRC_VAUX,
 812                                         ~APMG_PS_CTRL_MSK_PWR_SRC);
 813                         iwl3945_release_nic_access(priv);
 814
 815                         iwl3945_poll_bit(priv, CSR_GPIO_IN,
 816                                      CSR_GPIO_IN_VAL_VAUX_PWR_SRC,
 817                                      CSR_GPIO_IN_BIT_AUX_POWER, 5000);
 818                 } else
 819                         iwl3945_release_nic_access(priv);
 820         } else {
 821                 iwl3945_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
 822                                 APMG_PS_CTRL_VAL_PWR_SRC_VMAIN,
 823                                 ~APMG_PS_CTRL_MSK_PWR_SRC);
 824
 825                 iwl3945_release_nic_access(priv);
 826                 iwl3945_poll_bit(priv, CSR_GPIO_IN, CSR_GPIO_IN_VAL_VMAIN_PWR_SRC,
 827                              CSR_GPIO_IN_BIT_AUX_POWER, 5000);  /* uS */
 828         }
 829         spin_unlock_irqrestore(&priv->lock, flags);
 830
 831         return rc;
 832 }
 833
 834 static int iwl3945_rx_init(struct iwl3945_priv *priv, struct iwl3945_rx_queue *rxq)
 835 {
 836         int rc;
 837         unsigned long flags;
 838
 839         spin_lock_irqsave(&priv->lock, flags);
 840         rc = iwl3945_grab_nic_access(priv);
 841         if (rc) {
 842                 spin_unlock_irqrestore(&priv->lock, flags);
 843                 return rc;
 844         }
 845
 846         iwl3945_write_direct32(priv, FH_RCSR_RBD_BASE(0), rxq->dma_addr);
 847         iwl3945_write_direct32(priv, FH_RCSR_RPTR_ADDR(0),
 848                              priv->hw_setting.shared_phys +
 849                              offsetof(struct iwl3945_shared, rx_read_ptr[0]));
 850         iwl3945_write_direct32(priv, FH_RCSR_WPTR(0), 0);
 851         iwl3945_write_direct32(priv, FH_RCSR_CONFIG(0),
 852                 ALM_FH_RCSR_RX_CONFIG_REG_VAL_DMA_CHNL_EN_ENABLE |
 853                 ALM_FH_RCSR_RX_CONFIG_REG_VAL_RDRBD_EN_ENABLE |
 854                 ALM_FH_RCSR_RX_CONFIG_REG_BIT_WR_STTS_EN |
 855                 ALM_FH_RCSR_RX_CONFIG_REG_VAL_MAX_FRAG_SIZE_128 |
 856                 (RX_QUEUE_SIZE_LOG << ALM_FH_RCSR_RX_CONFIG_REG_POS_RBDC_SIZE) |
 857                 ALM_FH_RCSR_RX_CONFIG_REG_VAL_IRQ_DEST_INT_HOST |
 858                 (1 << ALM_FH_RCSR_RX_CONFIG_REG_POS_IRQ_RBTH) |
 859                 ALM_FH_RCSR_RX_CONFIG_REG_VAL_MSG_MODE_FH);
 860
 861         /* fake read to flush all prev I/O */
 862         iwl3945_read_direct32(priv, FH_RSSR_CTRL);
 863
 864         iwl3945_release_nic_access(priv);
 865         spin_unlock_irqrestore(&priv->lock, flags);
 866
 867         return 0;
 868 }
 869
 870 static int iwl3945_tx_reset(struct iwl3945_priv *priv)
 871 {
 872         int rc;
 873         unsigned long flags;
 874
 875         spin_lock_irqsave(&priv->lock, flags);
 876         rc = iwl3945_grab_nic_access(priv);
 877         if (rc) {
 878                 spin_unlock_irqrestore(&priv->lock, flags);
 879                 return rc;
 880         }
 881
 882         /* bypass mode */
 883         iwl3945_write_prph(priv, ALM_SCD_MODE_REG, 0x2);
 884
 885         /* RA 0 is active */
 886         iwl3945_write_prph(priv, ALM_SCD_ARASTAT_REG, 0x01);
 887
 888         /* all 6 fifo are active */
 889         iwl3945_write_prph(priv, ALM_SCD_TXFACT_REG, 0x3f);
 890
 891         iwl3945_write_prph(priv, ALM_SCD_SBYP_MODE_1_REG, 0x010000);
 892         iwl3945_write_prph(priv, ALM_SCD_SBYP_MODE_2_REG, 0x030002);
 893         iwl3945_write_prph(priv, ALM_SCD_TXF4MF_REG, 0x000004);
 894         iwl3945_write_prph(priv, ALM_SCD_TXF5MF_REG, 0x000005);
 895
 896         iwl3945_write_direct32(priv, FH_TSSR_CBB_BASE,
 897                              priv->hw_setting.shared_phys);
 898
 899         iwl3945_write_direct32(priv, FH_TSSR_MSG_CONFIG,
 900                 ALM_FH_TSSR_TX_MSG_CONFIG_REG_VAL_SNOOP_RD_TXPD_ON |
 901                 ALM_FH_TSSR_TX_MSG_CONFIG_REG_VAL_ORDER_RD_TXPD_ON |
 902                 ALM_FH_TSSR_TX_MSG_CONFIG_REG_VAL_MAX_FRAG_SIZE_128B |
 903                 ALM_FH_TSSR_TX_MSG_CONFIG_REG_VAL_SNOOP_RD_TFD_ON |
 904                 ALM_FH_TSSR_TX_MSG_CONFIG_REG_VAL_ORDER_RD_CBB_ON |
 905                 ALM_FH_TSSR_TX_MSG_CONFIG_REG_VAL_ORDER_RSP_WAIT_TH |
 906                 ALM_FH_TSSR_TX_MSG_CONFIG_REG_VAL_RSP_WAIT_TH);
 907
 908         iwl3945_release_nic_access(priv);
 909         spin_unlock_irqrestore(&priv->lock, flags);
 910
 911         return 0;
 912 }
 913
 914 /**
 915  * iwl3945_txq_ctx_reset - Reset TX queue context
 916  *
 917  * Destroys all DMA structures and initialize them again
 918  */
 919 static int iwl3945_txq_ctx_reset(struct iwl3945_priv *priv)
 920 {
 921         int rc;
 922         int txq_id, slots_num;
 923
 924         iwl3945_hw_txq_ctx_free(priv);
 925
 926         /* Tx CMD queue */
 927         rc = iwl3945_tx_reset(priv);
 928         if (rc)
 929                 goto error;
 930
 931         /* Tx queue(s) */
 932         for (txq_id = 0; txq_id < TFD_QUEUE_MAX; txq_id++) {
 933                 slots_num = (txq_id == IWL_CMD_QUEUE_NUM) ?
 934                                 TFD_CMD_SLOTS : TFD_TX_CMD_SLOTS;
 935                 rc = iwl3945_tx_queue_init(priv, &priv->txq[txq_id], slots_num,
 936                                 txq_id);
 937                 if (rc) {
 938                         IWL_ERROR("Tx %d queue init failed\n", txq_id);
 939                         goto error;
 940                 }
 941         }
 942
 943         return rc;
 944
 945  error:
 946         iwl3945_hw_txq_ctx_free(priv);
 947         return rc;
 948 }
 949
 950 int iwl3945_hw_nic_init(struct iwl3945_priv *priv)
 951 {
 952         u8 rev_id;
 953         int rc;
 954         unsigned long flags;
 955         struct iwl3945_rx_queue *rxq = &priv->rxq;
 956
 957         iwl3945_power_init_handle(priv);
 958
 959         spin_lock_irqsave(&priv->lock, flags);
 960         iwl3945_set_bit(priv, CSR_ANA_PLL_CFG, (1 << 24));
 961         iwl3945_set_bit(priv, CSR_GIO_CHICKEN_BITS,
 962                     CSR_GIO_CHICKEN_BITS_REG_BIT_L1A_NO_L0S_RX);
 963
 964         iwl3945_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
 965         rc = iwl3945_poll_bit(priv, CSR_GP_CNTRL,
 966                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
 967                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
 968         if (rc < 0) {
 969                 spin_unlock_irqrestore(&priv->lock, flags);
 970                 IWL_DEBUG_INFO("Failed to init the card\n");
 971                 return rc;
 972         }
 973
 974         rc = iwl3945_grab_nic_access(priv);
 975         if (rc) {
 976                 spin_unlock_irqrestore(&priv->lock, flags);
 977                 return rc;
 978         }
 979         iwl3945_write_prph(priv, APMG_CLK_EN_REG,
 980                                  APMG_CLK_VAL_DMA_CLK_RQT |
 981                                  APMG_CLK_VAL_BSM_CLK_RQT);
 982         udelay(20);
 983         iwl3945_set_bits_prph(priv, APMG_PCIDEV_STT_REG,
 984                                     APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
 985         iwl3945_release_nic_access(priv);
 986         spin_unlock_irqrestore(&priv->lock, flags);
 987
 988         /* Determine HW type */
 989         rc = pci_read_config_byte(priv->pci_dev, PCI_REVISION_ID, &rev_id);
 990         if (rc)
 991                 return rc;
 992         IWL_DEBUG_INFO("HW Revision ID = 0x%X\n", rev_id);
 993
 994         iwl3945_nic_set_pwr_src(priv, 1);
 995         spin_lock_irqsave(&priv->lock, flags);
 996
 997         if (rev_id & PCI_CFG_REV_ID_BIT_RTP)
 998                 IWL_DEBUG_INFO("RTP type \n");
 999         else if (rev_id & PCI_CFG_REV_ID_BIT_BASIC_SKU) {
1000                 IWL_DEBUG_INFO("ALM-MB type\n");
1001                 iwl3945_set_bit(priv, CSR_HW_IF_CONFIG_REG,
1002                             CSR_HW_IF_CONFIG_REG_BIT_ALMAGOR_MB);
1003         } else {
1004                 IWL_DEBUG_INFO("ALM-MM type\n");
1005                 iwl3945_set_bit(priv, CSR_HW_IF_CONFIG_REG,
1006                             CSR_HW_IF_CONFIG_REG_BIT_ALMAGOR_MM);
1007         }
1008
1009         spin_unlock_irqrestore(&priv->lock, flags);
1010
1011         /* Initialize the EEPROM */
1012         rc = iwl3945_eeprom_init(priv);
1013         if (rc)
1014                 return rc;
1015
1016         spin_lock_irqsave(&priv->lock, flags);
1017         if (EEPROM_SKU_CAP_OP_MODE_MRC == priv->eeprom.sku_cap) {
1018                 IWL_DEBUG_INFO("SKU OP mode is mrc\n");
1019                 iwl3945_set_bit(priv, CSR_HW_IF_CONFIG_REG,
1020                             CSR_HW_IF_CONFIG_REG_BIT_SKU_MRC);
1021         } else
1022                 IWL_DEBUG_INFO("SKU OP mode is basic\n");
1023
1024         if ((priv->eeprom.board_revision & 0xF0) == 0xD0) {
1025                 IWL_DEBUG_INFO("3945ABG revision is 0x%X\n",
1026                                priv->eeprom.board_revision);
1027                 iwl3945_set_bit(priv, CSR_HW_IF_CONFIG_REG,
1028                             CSR_HW_IF_CONFIG_REG_BIT_BOARD_TYPE);
1029         } else {
1030                 IWL_DEBUG_INFO("3945ABG revision is 0x%X\n",
1031                                priv->eeprom.board_revision);
1032                 iwl3945_clear_bit(priv, CSR_HW_IF_CONFIG_REG,
1033                               CSR_HW_IF_CONFIG_REG_BIT_BOARD_TYPE);
1034         }
1035
1036         if (priv->eeprom.almgor_m_version <= 1) {
1037                 iwl3945_set_bit(priv, CSR_HW_IF_CONFIG_REG,
1038                             CSR_HW_IF_CONFIG_REG_BITS_SILICON_TYPE_A);
1039                 IWL_DEBUG_INFO("Card M type A version is 0x%X\n",
1040                                priv->eeprom.almgor_m_version);
1041         } else {
1042                 IWL_DEBUG_INFO("Card M type B version is 0x%X\n",
1043                                priv->eeprom.almgor_m_version);
1044                 iwl3945_set_bit(priv, CSR_HW_IF_CONFIG_REG,
1045                             CSR_HW_IF_CONFIG_REG_BITS_SILICON_TYPE_B);
1046         }
1047         spin_unlock_irqrestore(&priv->lock, flags);
1048
1049         if (priv->eeprom.sku_cap & EEPROM_SKU_CAP_SW_RF_KILL_ENABLE)
1050                 IWL_DEBUG_RF_KILL("SW RF KILL supported in EEPROM.\n");
1051
1052         if (priv->eeprom.sku_cap & EEPROM_SKU_CAP_HW_RF_KILL_ENABLE)
1053                 IWL_DEBUG_RF_KILL("HW RF KILL supported in EEPROM.\n");
1054
1055         /* Allocate the RX queue, or reset if it is already allocated */
1056         if (!rxq->bd) {
1057                 rc = iwl3945_rx_queue_alloc(priv);
1058                 if (rc) {
1059                         IWL_ERROR("Unable to initialize Rx queue\n");
1060                         return -ENOMEM;
1061                 }
1062         } else
1063                 iwl3945_rx_queue_reset(priv, rxq);
1064
1065         iwl3945_rx_replenish(priv);
1066
1067         iwl3945_rx_init(priv, rxq);
1068
1069         spin_lock_irqsave(&priv->lock, flags);
1070
1071         /* Look at using this instead:
1072         rxq->need_update = 1;
1073         iwl3945_rx_queue_update_write_ptr(priv, rxq);
1074         */
1075
1076         rc = iwl3945_grab_nic_access(priv);
1077         if (rc) {
1078                 spin_unlock_irqrestore(&priv->lock, flags);
1079                 return rc;
1080         }
1081         iwl3945_write_direct32(priv, FH_RCSR_WPTR(0), rxq->write & ~7);
1082         iwl3945_release_nic_access(priv);
1083
1084         spin_unlock_irqrestore(&priv->lock, flags);
1085
1086         rc = iwl3945_txq_ctx_reset(priv);
1087         if (rc)
1088                 return rc;
1089
1090         set_bit(STATUS_INIT, &priv->status);
1091
1092         return 0;
1093 }
1094
1095 /**
1096  * iwl3945_hw_txq_ctx_free - Free TXQ Context
1097  *
1098  * Destroy all TX DMA queues and structures
1099  */
1100 void iwl3945_hw_txq_ctx_free(struct iwl3945_priv *priv)
1101 {
1102         int txq_id;
1103
1104         /* Tx queues */
1105         for (txq_id = 0; txq_id < TFD_QUEUE_MAX; txq_id++)
1106                 iwl3945_tx_queue_free(priv, &priv->txq[txq_id]);
1107 }
1108
1109 void iwl3945_hw_txq_ctx_stop(struct iwl3945_priv *priv)
1110 {
1111         int queue;
1112         unsigned long flags;
1113
1114         spin_lock_irqsave(&priv->lock, flags);
1115         if (iwl3945_grab_nic_access(priv)) {
1116                 spin_unlock_irqrestore(&priv->lock, flags);
1117                 iwl3945_hw_txq_ctx_free(priv);
1118                 return;
1119         }
1120
1121         /* stop SCD */
1122         iwl3945_write_prph(priv, ALM_SCD_MODE_REG, 0);
1123
1124         /* reset TFD queues */
1125         for (queue = TFD_QUEUE_MIN; queue < TFD_QUEUE_MAX; queue++) {
1126                 iwl3945_write_direct32(priv, FH_TCSR_CONFIG(queue), 0x0);
1127                 iwl3945_poll_direct_bit(priv, FH_TSSR_TX_STATUS,
1128                                 ALM_FH_TSSR_TX_STATUS_REG_MSK_CHNL_IDLE(queue),
1129                                 1000);
1130         }
1131
1132         iwl3945_release_nic_access(priv);
1133         spin_unlock_irqrestore(&priv->lock, flags);
1134
1135         iwl3945_hw_txq_ctx_free(priv);
1136 }
1137
1138 int iwl3945_hw_nic_stop_master(struct iwl3945_priv *priv)
1139 {
1140         int rc = 0;
1141         u32 reg_val;
1142         unsigned long flags;
1143
1144         spin_lock_irqsave(&priv->lock, flags);
1145
1146         /* set stop master bit */
1147         iwl3945_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
1148
1149         reg_val = iwl3945_read32(priv, CSR_GP_CNTRL);
1150
1151         if (CSR_GP_CNTRL_REG_FLAG_MAC_POWER_SAVE ==
1152             (reg_val & CSR_GP_CNTRL_REG_MSK_POWER_SAVE_TYPE))
1153                 IWL_DEBUG_INFO("Card in power save, master is already "
1154                                "stopped\n");
1155         else {
1156                 rc = iwl3945_poll_bit(priv, CSR_RESET,
1157                                   CSR_RESET_REG_FLAG_MASTER_DISABLED,
1158                                   CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
1159                 if (rc < 0) {
1160                         spin_unlock_irqrestore(&priv->lock, flags);
1161                         return rc;
1162                 }
1163         }
1164
1165         spin_unlock_irqrestore(&priv->lock, flags);
1166         IWL_DEBUG_INFO("stop master\n");
1167
1168         return rc;
1169 }
1170
1171 int iwl3945_hw_nic_reset(struct iwl3945_priv *priv)
1172 {
1173         int rc;
1174         unsigned long flags;
1175
1176         iwl3945_hw_nic_stop_master(priv);
1177
1178         spin_lock_irqsave(&priv->lock, flags);
1179
1180         iwl3945_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
1181
1182         rc = iwl3945_poll_bit(priv, CSR_GP_CNTRL,
1183                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
1184                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
1185
1186         rc = iwl3945_grab_nic_access(priv);
1187         if (!rc) {
1188                 iwl3945_write_prph(priv, APMG_CLK_CTRL_REG,
1189                                          APMG_CLK_VAL_BSM_CLK_RQT);
1190
1191                 udelay(10);
1192
1193                 iwl3945_set_bit(priv, CSR_GP_CNTRL,
1194                             CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
1195
1196                 iwl3945_write_prph(priv, APMG_RTC_INT_MSK_REG, 0x0);
1197                 iwl3945_write_prph(priv, APMG_RTC_INT_STT_REG,
1198                                         0xFFFFFFFF);
1199
1200                 /* enable DMA */
1201                 iwl3945_write_prph(priv, APMG_CLK_EN_REG,
1202                                          APMG_CLK_VAL_DMA_CLK_RQT |
1203                                          APMG_CLK_VAL_BSM_CLK_RQT);
1204                 udelay(10);
1205
1206                 iwl3945_set_bits_prph(priv, APMG_PS_CTRL_REG,
1207                                 APMG_PS_CTRL_VAL_RESET_REQ);
1208                 udelay(5);
1209                 iwl3945_clear_bits_prph(priv, APMG_PS_CTRL_REG,
1210                                 APMG_PS_CTRL_VAL_RESET_REQ);
1211                 iwl3945_release_nic_access(priv);
1212         }
1213
1214         /* Clear the 'host command active' bit... */
1215         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
1216
1217         wake_up_interruptible(&priv->wait_command_queue);
1218         spin_unlock_irqrestore(&priv->lock, flags);
1219
1220         return rc;
1221 }
1222
1223 /**
1224  * iwl3945_hw_reg_adjust_power_by_temp
1225  * return index delta into power gain settings table
1226 */
1227 static int iwl3945_hw_reg_adjust_power_by_temp(int new_reading, int old_reading)
1228 {
1229         return (new_reading - old_reading) * (-11) / 100;
1230 }
1231
1232 /**
1233  * iwl3945_hw_reg_temp_out_of_range - Keep temperature in sane range
1234  */
1235 static inline int iwl3945_hw_reg_temp_out_of_range(int temperature)
1236 {
1237         return (((temperature < -260) || (temperature > 25)) ? 1 : 0);
1238 }
1239
1240 int iwl3945_hw_get_temperature(struct iwl3945_priv *priv)
1241 {
1242         return iwl3945_read32(priv, CSR_UCODE_DRV_GP2);
1243 }
1244
1245 /**
1246  * iwl3945_hw_reg_txpower_get_temperature
1247  * get the current temperature by reading from NIC
1248 */
1249 static int iwl3945_hw_reg_txpower_get_temperature(struct iwl3945_priv *priv)
1250 {
1251         int temperature;
1252
1253         temperature = iwl3945_hw_get_temperature(priv);
1254
1255         /* driver's okay range is -260 to +25.
1256          *   human readable okay range is 0 to +285 */
1257         IWL_DEBUG_INFO("Temperature: %d\n", temperature + IWL_TEMP_CONVERT);
1258
1259         /* handle insane temp reading */
1260         if (iwl3945_hw_reg_temp_out_of_range(temperature)) {
1261                 IWL_ERROR("Error bad temperature value  %d\n", temperature);
1262
1263                 /* if really really hot(?),
1264                  *   substitute the 3rd band/group's temp measured at factory */
1265                 if (priv->last_temperature > 100)
1266                         temperature = priv->eeprom.groups[2].temperature;
1267                 else /* else use most recent "sane" value from driver */
1268                         temperature = priv->last_temperature;
1269         }
1270
1271         return temperature;     /* raw, not "human readable" */
1272 }
1273
1274 /* Adjust Txpower only if temperature variance is greater than threshold.
1275  *
1276  * Both are lower than older versions' 9 degrees */
1277 #define IWL_TEMPERATURE_LIMIT_TIMER   6
1278
1279 /**
1280  * is_temp_calib_needed - determines if new calibration is needed
1281  *
1282  * records new temperature in tx_mgr->temperature.
1283  * replaces tx_mgr->last_temperature *only* if calib needed
1284  *    (assumes caller will actually do the calibration!). */
1285 static int is_temp_calib_needed(struct iwl3945_priv *priv)
1286 {
1287         int temp_diff;
1288
1289         priv->temperature = iwl3945_hw_reg_txpower_get_temperature(priv);
1290         temp_diff = priv->temperature - priv->last_temperature;
1291
1292         /* get absolute value */
1293         if (temp_diff < 0) {
1294                 IWL_DEBUG_POWER("Getting cooler, delta %d,\n", temp_diff);
1295                 temp_diff = -temp_diff;
1296         } else if (temp_diff == 0)
1297                 IWL_DEBUG_POWER("Same temp,\n");
1298         else
1299                 IWL_DEBUG_POWER("Getting warmer, delta %d,\n", temp_diff);
1300
1301         /* if we don't need calibration, *don't* update last_temperature */
1302         if (temp_diff < IWL_TEMPERATURE_LIMIT_TIMER) {
1303                 IWL_DEBUG_POWER("Timed thermal calib not needed\n");
1304                 return 0;
1305         }
1306
1307         IWL_DEBUG_POWER("Timed thermal calib needed\n");
1308
1309         /* assume that caller will actually do calib ...
1310          *   update the "last temperature" value */
1311         priv->last_temperature = priv->temperature;
1312         return 1;
1313 }
1314
1315 #define IWL_MAX_GAIN_ENTRIES 78
1316 #define IWL_CCK_FROM_OFDM_POWER_DIFF  -5
1317 #define IWL_CCK_FROM_OFDM_INDEX_DIFF (10)
1318
1319 /* radio and DSP power table, each step is 1/2 dB.
1320  * 1st number is for RF analog gain, 2nd number is for DSP pre-DAC gain. */
1321 static struct iwl3945_tx_power power_gain_table[2][IWL_MAX_GAIN_ENTRIES] = {
1322         {
1323          {251, 127},            /* 2.4 GHz, highest power */
1324          {251, 127},
1325          {251, 127},
1326          {251, 127},
1327          {251, 125},
1328          {251, 110},
1329          {251, 105},
1330          {251, 98},
1331          {187, 125},
1332          {187, 115},
1333          {187, 108},
1334          {187, 99},
1335          {243, 119},
1336          {243, 111},
1337          {243, 105},
1338          {243, 97},
1339          {243, 92},
1340          {211, 106},
1341          {211, 100},
1342          {179, 120},
1343          {179, 113},
1344          {179, 107},
1345          {147, 125},
1346          {147, 119},
1347          {147, 112},
1348          {147, 106},
1349          {147, 101},
1350          {147, 97},
1351          {147, 91},
1352          {115, 107},
1353          {235, 121},
1354          {235, 115},
1355          {235, 109},
1356          {203, 127},
1357          {203, 121},
1358          {203, 115},
1359          {203, 108},
1360          {203, 102},
1361          {203, 96},
1362          {203, 92},
1363          {171, 110},
1364          {171, 104},
1365          {171, 98},
1366          {139, 116},
1367          {227, 125},
1368          {227, 119},
1369          {227, 113},
1370          {227, 107},
1371          {227, 101},
1372          {227, 96},
1373          {195, 113},
1374          {195, 106},
1375          {195, 102},
1376          {195, 95},
1377          {163, 113},
1378          {163, 106},
1379          {163, 102},
1380          {163, 95},
1381          {131, 113},
1382          {131, 106},
1383          {131, 102},
1384          {131, 95},
1385          {99, 113},
1386          {99, 106},
1387          {99, 102},
1388          {99, 95},
1389          {67, 113},
1390          {67, 106},
1391          {67, 102},
1392          {67, 95},
1393          {35, 113},
1394          {35, 106},
1395          {35, 102},
1396          {35, 95},
1397          {3, 113},
1398          {3, 106},
1399          {3, 102},
1400          {3, 95} },             /* 2.4 GHz, lowest power */
1401         {
1402          {251, 127},            /* 5.x GHz, highest power */
1403          {251, 120},
1404          {251, 114},
1405          {219, 119},
1406          {219, 101},
1407          {187, 113},
1408          {187, 102},
1409          {155, 114},
1410          {155, 103},
1411          {123, 117},
1412          {123, 107},
1413          {123, 99},
1414          {123, 92},
1415          {91, 108},
1416          {59, 125},
1417          {59, 118},
1418          {59, 109},
1419          {59, 102},
1420          {59, 96},
1421          {59, 90},
1422          {27, 104},
1423          {27, 98},
1424          {27, 92},
1425          {115, 118},
1426          {115, 111},
1427          {115, 104},
1428          {83, 126},
1429          {83, 121},
1430          {83, 113},
1431          {83, 105},
1432          {83, 99},
1433          {51, 118},
1434          {51, 111},
1435          {51, 104},
1436          {51, 98},
1437          {19, 116},
1438          {19, 109},
1439          {19, 102},
1440          {19, 98},
1441          {19, 93},
1442          {171, 113},
1443          {171, 107},
1444          {171, 99},
1445          {139, 120},
1446          {139, 113},
1447          {139, 107},
1448          {139, 99},
1449          {107, 120},
1450          {107, 113},
1451          {107, 107},
1452          {107, 99},
1453          {75, 120},
1454          {75, 113},
1455          {75, 107},
1456          {75, 99},
1457          {43, 120},
1458          {43, 113},
1459          {43, 107},
1460          {43, 99},
1461          {11, 120},
1462          {11, 113},
1463          {11, 107},
1464          {11, 99},
1465          {131, 107},
1466          {131, 99},
1467          {99, 120},
1468          {99, 113},
1469          {99, 107},
1470          {99, 99},
1471          {67, 120},
1472          {67, 113},
1473          {67, 107},
1474          {67, 99},
1475          {35, 120},
1476          {35, 113},
1477          {35, 107},
1478          {35, 99},
1479          {3, 120} }             /* 5.x GHz, lowest power */
1480 };
1481
1482 static inline u8 iwl3945_hw_reg_fix_power_index(int index)
1483 {
1484         if (index < 0)
1485                 return 0;
1486         if (index >= IWL_MAX_GAIN_ENTRIES)
1487                 return IWL_MAX_GAIN_ENTRIES - 1;
1488         return (u8) index;
1489 }
1490
1491 /* Kick off thermal recalibration check every 60 seconds */
1492 #define REG_RECALIB_PERIOD (60)
1493
1494 /**
1495  * iwl3945_hw_reg_set_scan_power - Set Tx power for scan probe requests
1496  *
1497  * Set (in our channel info database) the direct scan Tx power for 1 Mbit (CCK)
1498  * or 6 Mbit (OFDM) rates.
1499  */
1500 static void iwl3945_hw_reg_set_scan_power(struct iwl3945_priv *priv, u32 scan_tbl_index,
1501                                s32 rate_index, const s8 *clip_pwrs,
1502                                struct iwl3945_channel_info *ch_info,
1503                                int band_index)
1504 {
1505         struct iwl3945_scan_power_info *scan_power_info;
1506         s8 power;
1507         u8 power_index;
1508
1509         scan_power_info = &ch_info->scan_pwr_info[scan_tbl_index];
1510
1511         /* use this channel group's 6Mbit clipping/saturation pwr,
1512          *   but cap at regulatory scan power restriction (set during init
1513          *   based on eeprom channel data) for this channel.  */
1514         power = min(ch_info->scan_power, clip_pwrs[IWL_RATE_6M_INDEX_TABLE]);
1515
1516         /* further limit to user's max power preference.
1517          * FIXME:  Other spectrum management power limitations do not
1518          *   seem to apply?? */
1519         power = min(power, priv->user_txpower_limit);
1520         scan_power_info->requested_power = power;
1521
1522         /* find difference between new scan *power* and current "normal"
1523          *   Tx *power* for 6Mb.  Use this difference (x2) to adjust the
1524          *   current "normal" temperature-compensated Tx power *index* for
1525          *   this rate (1Mb or 6Mb) to yield new temp-compensated scan power
1526          *   *index*. */
1527         power_index = ch_info->power_info[rate_index].power_table_index
1528             - (power - ch_info->power_info
1529                [IWL_RATE_6M_INDEX_TABLE].requested_power) * 2;
1530
1531         /* store reference index that we use when adjusting *all* scan
1532          *   powers.  So we can accommodate user (all channel) or spectrum
1533          *   management (single channel) power changes "between" temperature
1534          *   feedback compensation procedures.
1535          * don't force fit this reference index into gain table; it may be a
1536          *   negative number.  This will help avoid errors when we're at
1537          *   the lower bounds (highest gains, for warmest temperatures)
1538          *   of the table. */
1539
1540         /* don't exceed table bounds for "real" setting */
1541         power_index = iwl3945_hw_reg_fix_power_index(power_index);
1542
1543         scan_power_info->power_table_index = power_index;
1544         scan_power_info->tpc.tx_gain =
1545             power_gain_table[band_index][power_index].tx_gain;
1546         scan_power_info->tpc.dsp_atten =
1547             power_gain_table[band_index][power_index].dsp_atten;
1548 }
1549
1550 /**
1551  * iwl3945_hw_reg_send_txpower - fill in Tx Power command with gain settings
1552  *
1553  * Configures power settings for all rates for the current channel,
1554  * using values from channel info struct, and send to NIC
1555  */
1556 int iwl3945_hw_reg_send_txpower(struct iwl3945_priv *priv)
1557 {
1558         int rate_idx, i;
1559         const struct iwl3945_channel_info *ch_info = NULL;
1560         struct iwl3945_txpowertable_cmd txpower = {
1561                 .channel = priv->active_rxon.channel,
1562         };
1563
1564         txpower.band = (priv->phymode == MODE_IEEE80211A) ? 0 : 1;
1565         ch_info = iwl3945_get_channel_info(priv,
1566                                        priv->phymode,
1567                                        le16_to_cpu(priv->active_rxon.channel));
1568         if (!ch_info) {
1569                 IWL_ERROR
1570                     ("Failed to get channel info for channel %d [%d]\n",
1571                      le16_to_cpu(priv->active_rxon.channel), priv->phymode);
1572                 return -EINVAL;
1573         }
1574
1575         if (!is_channel_valid(ch_info)) {
1576                 IWL_DEBUG_POWER("Not calling TX_PWR_TABLE_CMD on "
1577                                 "non-Tx channel.\n");
1578                 return 0;
1579         }
1580
1581         /* fill cmd with power settings for all rates for current channel */
1582         /* Fill OFDM rate */
1583         for (rate_idx = IWL_FIRST_OFDM_RATE, i = 0;
1584              rate_idx <= IWL_LAST_OFDM_RATE; rate_idx++, i++) {
1585
1586                 txpower.power[i].tpc = ch_info->power_info[i].tpc;
1587                 txpower.power[i].rate = iwl3945_rates[rate_idx].plcp;
1588
1589                 IWL_DEBUG_POWER("ch %d:%d rf %d dsp %3d rate code 0x%02x\n",
1590                                 le16_to_cpu(txpower.channel),
1591                                 txpower.band,
1592                                 txpower.power[i].tpc.tx_gain,
1593                                 txpower.power[i].tpc.dsp_atten,
1594                                 txpower.power[i].rate);
1595         }
1596         /* Fill CCK rates */
1597         for (rate_idx = IWL_FIRST_CCK_RATE;
1598              rate_idx <= IWL_LAST_CCK_RATE; rate_idx++, i++) {
1599                 txpower.power[i].tpc = ch_info->power_info[i].tpc;
1600                 txpower.power[i].rate = iwl3945_rates[rate_idx].plcp;
1601
1602                 IWL_DEBUG_POWER("ch %d:%d rf %d dsp %3d rate code 0x%02x\n",
1603                                 le16_to_cpu(txpower.channel),
1604                                 txpower.band,
1605                                 txpower.power[i].tpc.tx_gain,
1606                                 txpower.power[i].tpc.dsp_atten,
1607                                 txpower.power[i].rate);
1608         }
1609
1610         return iwl3945_send_cmd_pdu(priv, REPLY_TX_PWR_TABLE_CMD,
1611                         sizeof(struct iwl3945_txpowertable_cmd), &txpower);
1612
1613 }
1614
1615 /**
1616  * iwl3945_hw_reg_set_new_power - Configures power tables at new levels
1617  * @ch_info: Channel to update.  Uses power_info.requested_power.
1618  *
1619  * Replace requested_power and base_power_index ch_info fields for
1620  * one channel.
1621  *
1622  * Called if user or spectrum management changes power preferences.
1623  * Takes into account h/w and modulation limitations (clip power).
1624  *
1625  * This does *not* send anything to NIC, just sets up ch_info for one channel.
1626  *
1627  * NOTE: reg_compensate_for_temperature_dif() *must* be run after this to
1628  *       properly fill out the scan powers, and actual h/w gain settings,
1629  *       and send changes to NIC
1630  */
1631 static int iwl3945_hw_reg_set_new_power(struct iwl3945_priv *priv,
1632                              struct iwl3945_channel_info *ch_info)
1633 {
1634         struct iwl3945_channel_power_info *power_info;
1635         int power_changed = 0;
1636         int i;
1637         const s8 *clip_pwrs;
1638         int power;
1639
1640         /* Get this chnlgrp's rate-to-max/clip-powers table */
1641         clip_pwrs = priv->clip_groups[ch_info->group_index].clip_powers;
1642
1643         /* Get this channel's rate-to-current-power settings table */
1644         power_info = ch_info->power_info;
1645
1646         /* update OFDM Txpower settings */
1647         for (i = IWL_RATE_6M_INDEX_TABLE; i <= IWL_RATE_54M_INDEX_TABLE;
1648              i++, ++power_info) {
1649                 int delta_idx;
1650
1651                 /* limit new power to be no more than h/w capability */
1652                 power = min(ch_info->curr_txpow, clip_pwrs[i]);
1653                 if (power == power_info->requested_power)
1654                         continue;
1655
1656                 /* find difference between old and new requested powers,
1657                  *    update base (non-temp-compensated) power index */
1658                 delta_idx = (power - power_info->requested_power) * 2;
1659                 power_info->base_power_index -= delta_idx;
1660
1661                 /* save new requested power value */
1662                 power_info->requested_power = power;
1663
1664                 power_changed = 1;
1665         }
1666
1667         /* update CCK Txpower settings, based on OFDM 12M setting ...
1668          *    ... all CCK power settings for a given channel are the *same*. */
1669         if (power_changed) {
1670                 power =
1671                     ch_info->power_info[IWL_RATE_12M_INDEX_TABLE].
1672                     requested_power + IWL_CCK_FROM_OFDM_POWER_DIFF;
1673
1674                 /* do all CCK rates' iwl3945_channel_power_info structures */
1675                 for (i = IWL_RATE_1M_INDEX_TABLE; i <= IWL_RATE_11M_INDEX_TABLE; i++) {
1676                         power_info->requested_power = power;
1677                         power_info->base_power_index =
1678                             ch_info->power_info[IWL_RATE_12M_INDEX_TABLE].
1679                             base_power_index + IWL_CCK_FROM_OFDM_INDEX_DIFF;
1680                         ++power_info;
1681                 }
1682         }
1683
1684         return 0;
1685 }
1686
1687 /**
1688  * iwl3945_hw_reg_get_ch_txpower_limit - returns new power limit for channel
1689  *
1690  * NOTE: Returned power limit may be less (but not more) than requested,
1691  *       based strictly on regulatory (eeprom and spectrum mgt) limitations
1692  *       (no consideration for h/w clipping limitations).
1693  */
1694 static int iwl3945_hw_reg_get_ch_txpower_limit(struct iwl3945_channel_info *ch_info)
1695 {
1696         s8 max_power;
1697
1698 #if 0
1699         /* if we're using TGd limits, use lower of TGd or EEPROM */
1700         if (ch_info->tgd_data.max_power != 0)
1701                 max_power = min(ch_info->tgd_data.max_power,
1702                                 ch_info->eeprom.max_power_avg);
1703
1704         /* else just use EEPROM limits */
1705         else
1706 #endif
1707                 max_power = ch_info->eeprom.max_power_avg;
1708
1709         return min(max_power, ch_info->max_power_avg);
1710 }
1711
1712 /**
1713  * iwl3945_hw_reg_comp_txpower_temp - Compensate for temperature
1714  *
1715  * Compensate txpower settings of *all* channels for temperature.
1716  * This only accounts for the difference between current temperature
1717  *   and the factory calibration temperatures, and bases the new settings
1718  *   on the channel's base_power_index.
1719  *
1720  * If RxOn is "associated", this sends the new Txpower to NIC!
1721  */
1722 static int iwl3945_hw_reg_comp_txpower_temp(struct iwl3945_priv *priv)
1723 {
1724         struct iwl3945_channel_info *ch_info = NULL;
1725         int delta_index;
1726         const s8 *clip_pwrs; /* array of h/w max power levels for each rate */
1727         u8 a_band;
1728         u8 rate_index;
1729         u8 scan_tbl_index;
1730         u8 i;
1731         int ref_temp;
1732         int temperature = priv->temperature;
1733
1734         /* set up new Tx power info for each and every channel, 2.4 and 5.x */
1735         for (i = 0; i < priv->channel_count; i++) {
1736                 ch_info = &priv->channel_info[i];
1737                 a_band = is_channel_a_band(ch_info);
1738
1739                 /* Get this chnlgrp's factory calibration temperature */
1740                 ref_temp = (s16)priv->eeprom.groups[ch_info->group_index].
1741                     temperature;
1742
1743                 /* get power index adjustment based on curr and factory
1744                  * temps */
1745                 delta_index = iwl3945_hw_reg_adjust_power_by_temp(temperature,
1746                                                               ref_temp);
1747
1748                 /* set tx power value for all rates, OFDM and CCK */
1749                 for (rate_index = 0; rate_index < IWL_RATE_COUNT;
1750                      rate_index++) {
1751                         int power_idx =
1752                             ch_info->power_info[rate_index].base_power_index;
1753
1754                         /* temperature compensate */
1755                         power_idx += delta_index;
1756
1757                         /* stay within table range */
1758                         power_idx = iwl3945_hw_reg_fix_power_index(power_idx);
1759                         ch_info->power_info[rate_index].
1760                             power_table_index = (u8) power_idx;
1761                         ch_info->power_info[rate_index].tpc =
1762                             power_gain_table[a_band][power_idx];
1763                 }
1764
1765                 /* Get this chnlgrp's rate-to-max/clip-powers table */
1766                 clip_pwrs = priv->clip_groups[ch_info->group_index].clip_powers;
1767
1768                 /* set scan tx power, 1Mbit for CCK, 6Mbit for OFDM */
1769                 for (scan_tbl_index = 0;
1770                      scan_tbl_index < IWL_NUM_SCAN_RATES; scan_tbl_index++) {
1771                         s32 actual_index = (scan_tbl_index == 0) ?
1772                             IWL_RATE_1M_INDEX_TABLE : IWL_RATE_6M_INDEX_TABLE;
1773                         iwl3945_hw_reg_set_scan_power(priv, scan_tbl_index,
1774                                            actual_index, clip_pwrs,
1775                                            ch_info, a_band);
1776                 }
1777         }
1778
1779         /* send Txpower command for current channel to ucode */
1780         return iwl3945_hw_reg_send_txpower(priv);
1781 }
1782
1783 int iwl3945_hw_reg_set_txpower(struct iwl3945_priv *priv, s8 power)
1784 {
1785         struct iwl3945_channel_info *ch_info;
1786         s8 max_power;
1787         u8 a_band;
1788         u8 i;
1789
1790         if (priv->user_txpower_limit == power) {
1791                 IWL_DEBUG_POWER("Requested Tx power same as current "
1792                                 "limit: %ddBm.\n", power);
1793                 return 0;
1794         }
1795
1796         IWL_DEBUG_POWER("Setting upper limit clamp to %ddBm.\n", power);
1797         priv->user_txpower_limit = power;
1798
1799         /* set up new Tx powers for each and every channel, 2.4 and 5.x */
1800
1801         for (i = 0; i < priv->channel_count; i++) {
1802                 ch_info = &priv->channel_info[i];
1803                 a_band = is_channel_a_band(ch_info);
1804
1805                 /* find minimum power of all user and regulatory constraints
1806                  *    (does not consider h/w clipping limitations) */
1807                 max_power = iwl3945_hw_reg_get_ch_txpower_limit(ch_info);
1808                 max_power = min(power, max_power);
1809                 if (max_power != ch_info->curr_txpow) {
1810                         ch_info->curr_txpow = max_power;
1811
1812                         /* this considers the h/w clipping limitations */
1813                         iwl3945_hw_reg_set_new_power(priv, ch_info);
1814                 }
1815         }
1816
1817         /* update txpower settings for all channels,
1818          *   send to NIC if associated. */
1819         is_temp_calib_needed(priv);
1820         iwl3945_hw_reg_comp_txpower_temp(priv);
1821
1822         return 0;
1823 }
1824
1825 /* will add 3945 channel switch cmd handling later */
1826 int iwl3945_hw_channel_switch(struct iwl3945_priv *priv, u16 channel)
1827 {
1828         return 0;
1829 }
1830
1831 /**
1832  * iwl3945_reg_txpower_periodic -  called when time to check our temperature.
1833  *
1834  * -- reset periodic timer
1835  * -- see if temp has changed enough to warrant re-calibration ... if so:
1836  *     -- correct coeffs for temp (can reset temp timer)
1837  *     -- save this temp as "last",
1838  *     -- send new set of gain settings to NIC
1839  * NOTE:  This should continue working, even when we're not associated,
1840  *   so we can keep our internal table of scan powers current. */
1841 void iwl3945_reg_txpower_periodic(struct iwl3945_priv *priv)
1842 {
1843         /* This will kick in the "brute force"
1844          * iwl3945_hw_reg_comp_txpower_temp() below */
1845         if (!is_temp_calib_needed(priv))
1846                 goto reschedule;
1847
1848         /* Set up a new set of temp-adjusted TxPowers, send to NIC.
1849          * This is based *only* on current temperature,
1850          * ignoring any previous power measurements */
1851         iwl3945_hw_reg_comp_txpower_temp(priv);
1852
1853  reschedule:
1854         queue_delayed_work(priv->workqueue,
1855                            &priv->thermal_periodic, REG_RECALIB_PERIOD * HZ);
1856 }
1857
1858 static void iwl3945_bg_reg_txpower_periodic(struct work_struct *work)
1859 {
1860         struct iwl3945_priv *priv = container_of(work, struct iwl3945_priv,
1861                                              thermal_periodic.work);
1862
1863         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1864                 return;
1865
1866         mutex_lock(&priv->mutex);
1867         iwl3945_reg_txpower_periodic(priv);
1868         mutex_unlock(&priv->mutex);
1869 }
1870
1871 /**
1872  * iwl3945_hw_reg_get_ch_grp_index - find the channel-group index (0-4)
1873  *                                 for the channel.
1874  *
1875  * This function is used when initializing channel-info structs.
1876  *
1877  * NOTE: These channel groups do *NOT* match the bands above!
1878  *       These channel groups are based on factory-tested channels;
1879  *       on A-band, EEPROM's "group frequency" entries represent the top
1880  *       channel in each group 1-4.  Group 5 All B/G channels are in group 0.
1881  */
1882 static u16 iwl3945_hw_reg_get_ch_grp_index(struct iwl3945_priv *priv,
1883                                        const struct iwl3945_channel_info *ch_info)
1884 {
1885         struct iwl3945_eeprom_txpower_group *ch_grp = &priv->eeprom.groups[0];
1886         u8 group;
1887         u16 group_index = 0;    /* based on factory calib frequencies */
1888         u8 grp_channel;
1889
1890         /* Find the group index for the channel ... don't use index 1(?) */
1891         if (is_channel_a_band(ch_info)) {
1892                 for (group = 1; group < 5; group++) {
1893                         grp_channel = ch_grp[group].group_channel;
1894                         if (ch_info->channel <= grp_channel) {
1895                                 group_index = group;
1896                                 break;
1897                         }
1898                 }
1899                 /* group 4 has a few channels *above* its factory cal freq */
1900                 if (group == 5)
1901                         group_index = 4;
1902         } else
1903                 group_index = 0;        /* 2.4 GHz, group 0 */
1904
1905         IWL_DEBUG_POWER("Chnl %d mapped to grp %d\n", ch_info->channel,
1906                         group_index);
1907         return group_index;
1908 }
1909
1910 /**
1911  * iwl3945_hw_reg_get_matched_power_index - Interpolate to get nominal index
1912  *
1913  * Interpolate to get nominal (i.e. at factory calibration temperature) index
1914  *   into radio/DSP gain settings table for requested power.
1915  */
1916 static int iwl3945_hw_reg_get_matched_power_index(struct iwl3945_priv *priv,
1917                                        s8 requested_power,
1918                                        s32 setting_index, s32 *new_index)
1919 {
1920         const struct iwl3945_eeprom_txpower_group *chnl_grp = NULL;
1921         s32 index0, index1;
1922         s32 power = 2 * requested_power;
1923         s32 i;
1924         const struct iwl3945_eeprom_txpower_sample *samples;
1925         s32 gains0, gains1;
1926         s32 res;
1927         s32 denominator;
1928
1929         chnl_grp = &priv->eeprom.groups[setting_index];
1930         samples = chnl_grp->samples;
1931         for (i = 0; i < 5; i++) {
1932                 if (power == samples[i].power) {
1933                         *new_index = samples[i].gain_index;
1934                         return 0;
1935                 }
1936         }
1937
1938         if (power > samples[1].power) {
1939                 index0 = 0;
1940                 index1 = 1;
1941         } else if (power > samples[2].power) {
1942                 index0 = 1;
1943                 index1 = 2;
1944         } else if (power > samples[3].power) {
1945                 index0 = 2;
1946                 index1 = 3;
1947         } else {
1948                 index0 = 3;
1949                 index1 = 4;
1950         }
1951
1952         denominator = (s32) samples[index1].power - (s32) samples[index0].power;
1953         if (denominator == 0)
1954                 return -EINVAL;
1955         gains0 = (s32) samples[index0].gain_index * (1 << 19);
1956         gains1 = (s32) samples[index1].gain_index * (1 << 19);
1957         res = gains0 + (gains1 - gains0) *
1958             ((s32) power - (s32) samples[index0].power) / denominator +
1959             (1 << 18);
1960         *new_index = res >> 19;
1961         return 0;
1962 }
1963
1964 static void iwl3945_hw_reg_init_channel_groups(struct iwl3945_priv *priv)
1965 {
1966         u32 i;
1967         s32 rate_index;
1968         const struct iwl3945_eeprom_txpower_group *group;
1969
1970         IWL_DEBUG_POWER("Initializing factory calib info from EEPROM\n");
1971
1972         for (i = 0; i < IWL_NUM_TX_CALIB_GROUPS; i++) {
1973                 s8 *clip_pwrs;  /* table of power levels for each rate */
1974                 s8 satur_pwr;   /* saturation power for each chnl group */
1975                 group = &priv->eeprom.groups[i];
1976
1977                 /* sanity check on factory saturation power value */
1978                 if (group->saturation_power < 40) {
1979                         IWL_WARNING("Error: saturation power is %d, "
1980                                     "less than minimum expected 40\n",
1981                                     group->saturation_power);
1982                         return;
1983                 }
1984
1985                 /*
1986                  * Derive requested power levels for each rate, based on
1987                  *   hardware capabilities (saturation power for band).
1988                  * Basic value is 3dB down from saturation, with further
1989                  *   power reductions for highest 3 data rates.  These
1990                  *   backoffs provide headroom for high rate modulation
1991                  *   power peaks, without too much distortion (clipping).
1992                  */
1993                 /* we'll fill in this array with h/w max power levels */
1994                 clip_pwrs = (s8 *) priv->clip_groups[i].clip_powers;
1995
1996                 /* divide factory saturation power by 2 to find -3dB level */
1997                 satur_pwr = (s8) (group->saturation_power >> 1);
1998
1999                 /* fill in channel group's nominal powers for each rate */
2000                 for (rate_index = 0;
2001                      rate_index < IWL_RATE_COUNT; rate_index++, clip_pwrs++) {
2002                         switch (rate_index) {
2003                         case IWL_RATE_36M_INDEX_TABLE:
2004                                 if (i == 0)     /* B/G */
2005                                         *clip_pwrs = satur_pwr;
2006                                 else    /* A */
2007                                         *clip_pwrs = satur_pwr - 5;
2008                                 break;
2009                         case IWL_RATE_48M_INDEX_TABLE:
2010                                 if (i == 0)
2011                                         *clip_pwrs = satur_pwr - 7;
2012                                 else
2013                                         *clip_pwrs = satur_pwr - 10;
2014                                 break;
2015                         case IWL_RATE_54M_INDEX_TABLE:
2016                                 if (i == 0)
2017                                         *clip_pwrs = satur_pwr - 9;
2018                                 else
2019                                         *clip_pwrs = satur_pwr - 12;
2020                                 break;
2021                         default:
2022                                 *clip_pwrs = satur_pwr;
2023                                 break;
2024                         }
2025                 }
2026         }
2027 }
2028
2029 /**
2030  * iwl3945_txpower_set_from_eeprom - Set channel power info based on EEPROM
2031  *
2032  * Second pass (during init) to set up priv->channel_info
2033  *
2034  * Set up Tx-power settings in our channel info database for each VALID
2035  * (for this geo/SKU) channel, at all Tx data rates, based on eeprom values
2036  * and current temperature.
2037  *
2038  * Since this is based on current temperature (at init time), these values may
2039  * not be valid for very long, but it gives us a starting/default point,
2040  * and allows us to active (i.e. using Tx) scan.
2041  *
2042  * This does *not* write values to NIC, just sets up our internal table.
2043  */
2044 int iwl3945_txpower_set_from_eeprom(struct iwl3945_priv *priv)
2045 {
2046         struct iwl3945_channel_info *ch_info = NULL;
2047         struct iwl3945_channel_power_info *pwr_info;
2048         int delta_index;
2049         u8 rate_index;
2050         u8 scan_tbl_index;
2051         const s8 *clip_pwrs;    /* array of power levels for each rate */
2052         u8 gain, dsp_atten;
2053         s8 power;
2054         u8 pwr_index, base_pwr_index, a_band;
2055         u8 i;
2056         int temperature;
2057
2058         /* save temperature reference,
2059          *   so we can determine next time to calibrate */
2060         temperature = iwl3945_hw_reg_txpower_get_temperature(priv);
2061         priv->last_temperature = temperature;
2062
2063         iwl3945_hw_reg_init_channel_groups(priv);
2064
2065         /* initialize Tx power info for each and every channel, 2.4 and 5.x */
2066         for (i = 0, ch_info = priv->channel_info; i < priv->channel_count;
2067              i++, ch_info++) {
2068                 a_band = is_channel_a_band(ch_info);
2069                 if (!is_channel_valid(ch_info))
2070                         continue;
2071
2072                 /* find this channel's channel group (*not* "band") index */
2073                 ch_info->group_index =
2074                         iwl3945_hw_reg_get_ch_grp_index(priv, ch_info);
2075
2076                 /* Get this chnlgrp's rate->max/clip-powers table */
2077                 clip_pwrs = priv->clip_groups[ch_info->group_index].clip_powers;
2078
2079                 /* calculate power index *adjustment* value according to
2080                  *  diff between current temperature and factory temperature */
2081                 delta_index = iwl3945_hw_reg_adjust_power_by_temp(temperature,
2082                                 priv->eeprom.groups[ch_info->group_index].
2083                                 temperature);
2084
2085                 IWL_DEBUG_POWER("Delta index for channel %d: %d [%d]\n",
2086                                 ch_info->channel, delta_index, temperature +
2087                                 IWL_TEMP_CONVERT);
2088
2089                 /* set tx power value for all OFDM rates */
2090                 for (rate_index = 0; rate_index < IWL_OFDM_RATES;
2091                      rate_index++) {
2092                         s32 power_idx;
2093                         int rc;
2094
2095                         /* use channel group's clip-power table,
2096                          *   but don't exceed channel's max power */
2097                         s8 pwr = min(ch_info->max_power_avg,
2098                                      clip_pwrs[rate_index]);
2099
2100                         pwr_info = &ch_info->power_info[rate_index];
2101
2102                         /* get base (i.e. at factory-measured temperature)
2103                          *    power table index for this rate's power */
2104                         rc = iwl3945_hw_reg_get_matched_power_index(priv, pwr,
2105                                                          ch_info->group_index,
2106                                                          &power_idx);
2107                         if (rc) {
2108                                 IWL_ERROR("Invalid power index\n");
2109                                 return rc;
2110                         }
2111                         pwr_info->base_power_index = (u8) power_idx;
2112
2113                         /* temperature compensate */
2114                         power_idx += delta_index;
2115
2116                         /* stay within range of gain table */
2117                         power_idx = iwl3945_hw_reg_fix_power_index(power_idx);
2118
2119                         /* fill 1 OFDM rate's iwl3945_channel_power_info struct */
2120                         pwr_info->requested_power = pwr;
2121                         pwr_info->power_table_index = (u8) power_idx;
2122                         pwr_info->tpc.tx_gain =
2123                             power_gain_table[a_band][power_idx].tx_gain;
2124                         pwr_info->tpc.dsp_atten =
2125                             power_gain_table[a_band][power_idx].dsp_atten;
2126                 }
2127
2128                 /* set tx power for CCK rates, based on OFDM 12 Mbit settings*/
2129                 pwr_info = &ch_info->power_info[IWL_RATE_12M_INDEX_TABLE];
2130                 power = pwr_info->requested_power +
2131                         IWL_CCK_FROM_OFDM_POWER_DIFF;
2132                 pwr_index = pwr_info->power_table_index +
2133                         IWL_CCK_FROM_OFDM_INDEX_DIFF;
2134                 base_pwr_index = pwr_info->base_power_index +
2135                         IWL_CCK_FROM_OFDM_INDEX_DIFF;
2136
2137                 /* stay within table range */
2138                 pwr_index = iwl3945_hw_reg_fix_power_index(pwr_index);
2139                 gain = power_gain_table[a_band][pwr_index].tx_gain;
2140                 dsp_atten = power_gain_table[a_band][pwr_index].dsp_atten;
2141
2142                 /* fill each CCK rate's iwl3945_channel_power_info structure
2143                  * NOTE:  All CCK-rate Txpwrs are the same for a given chnl!
2144                  * NOTE:  CCK rates start at end of OFDM rates! */
2145                 for (rate_index = 0;
2146                      rate_index < IWL_CCK_RATES; rate_index++) {
2147                         pwr_info = &ch_info->power_info[rate_index+IWL_OFDM_RATES];
2148                         pwr_info->requested_power = power;
2149                         pwr_info->power_table_index = pwr_index;
2150                         pwr_info->base_power_index = base_pwr_index;
2151                         pwr_info->tpc.tx_gain = gain;
2152                         pwr_info->tpc.dsp_atten = dsp_atten;
2153                 }
2154
2155                 /* set scan tx power, 1Mbit for CCK, 6Mbit for OFDM */
2156                 for (scan_tbl_index = 0;
2157                      scan_tbl_index < IWL_NUM_SCAN_RATES; scan_tbl_index++) {
2158                         s32 actual_index = (scan_tbl_index == 0) ?
2159                                 IWL_RATE_1M_INDEX_TABLE : IWL_RATE_6M_INDEX_TABLE;
2160                         iwl3945_hw_reg_set_scan_power(priv, scan_tbl_index,
2161                                 actual_index, clip_pwrs, ch_info, a_band);
2162                 }
2163         }
2164
2165         return 0;
2166 }
2167
2168 int iwl3945_hw_rxq_stop(struct iwl3945_priv *priv)
2169 {
2170         int rc;
2171         unsigned long flags;
2172
2173         spin_lock_irqsave(&priv->lock, flags);
2174         rc = iwl3945_grab_nic_access(priv);
2175         if (rc) {
2176                 spin_unlock_irqrestore(&priv->lock, flags);
2177                 return rc;
2178         }
2179
2180         iwl3945_write_direct32(priv, FH_RCSR_CONFIG(0), 0);
2181         rc = iwl3945_poll_direct_bit(priv, FH_RSSR_STATUS, (1 << 24), 1000);
2182         if (rc < 0)
2183                 IWL_ERROR("Can't stop Rx DMA.\n");
2184
2185         iwl3945_release_nic_access(priv);
2186         spin_unlock_irqrestore(&priv->lock, flags);
2187
2188         return 0;
2189 }
2190
2191 int iwl3945_hw_tx_queue_init(struct iwl3945_priv *priv, struct iwl3945_tx_queue *txq)
2192 {
2193         int rc;
2194         unsigned long flags;
2195         int txq_id = txq->q.id;
2196
2197         struct iwl3945_shared *shared_data = priv->hw_setting.shared_virt;
2198
2199         shared_data->tx_base_ptr[txq_id] = cpu_to_le32((u32)txq->q.dma_addr);
2200
2201         spin_lock_irqsave(&priv->lock, flags);
2202         rc = iwl3945_grab_nic_access(priv);
2203         if (rc) {
2204                 spin_unlock_irqrestore(&priv->lock, flags);
2205                 return rc;
2206         }
2207         iwl3945_write_direct32(priv, FH_CBCC_CTRL(txq_id), 0);
2208         iwl3945_write_direct32(priv, FH_CBCC_BASE(txq_id), 0);
2209
2210         iwl3945_write_direct32(priv, FH_TCSR_CONFIG(txq_id),
2211                 ALM_FH_TCSR_TX_CONFIG_REG_VAL_CIRQ_RTC_NOINT |
2212                 ALM_FH_TCSR_TX_CONFIG_REG_VAL_MSG_MODE_TXF |
2213                 ALM_FH_TCSR_TX_CONFIG_REG_VAL_CIRQ_HOST_IFTFD |
2214                 ALM_FH_TCSR_TX_CONFIG_REG_VAL_DMA_CREDIT_ENABLE_VAL |
2215                 ALM_FH_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_ENABLE);
2216         iwl3945_release_nic_access(priv);
2217
2218         /* fake read to flush all prev. writes */
2219         iwl3945_read32(priv, FH_TSSR_CBB_BASE);
2220         spin_unlock_irqrestore(&priv->lock, flags);
2221
2222         return 0;
2223 }
2224
2225 int iwl3945_hw_get_rx_read(struct iwl3945_priv *priv)
2226 {
2227         struct iwl3945_shared *shared_data = priv->hw_setting.shared_virt;
2228
2229         return le32_to_cpu(shared_data->rx_read_ptr[0]);
2230 }
2231
2232 /**
2233  * iwl3945_init_hw_rate_table - Initialize the hardware rate fallback table
2234  */
2235 int iwl3945_init_hw_rate_table(struct iwl3945_priv *priv)
2236 {
2237         int rc, i, index, prev_index;
2238         struct iwl3945_rate_scaling_cmd rate_cmd = {
2239                 .reserved = {0, 0, 0},
2240         };
2241         struct iwl3945_rate_scaling_info *table = rate_cmd.table;
2242
2243         for (i = 0; i < ARRAY_SIZE(iwl3945_rates); i++) {
2244                 index = iwl3945_rates[i].table_rs_index;
2245
2246                 table[index].rate_n_flags =
2247                         iwl3945_hw_set_rate_n_flags(iwl3945_rates[i].plcp, 0);
2248                 table[index].try_cnt = priv->retry_rate;
2249                 prev_index = iwl3945_get_prev_ieee_rate(i);
2250                 table[index].next_rate_index = iwl3945_rates[prev_index].table_rs_index;
2251         }
2252
2253         switch (priv->phymode) {
2254         case MODE_IEEE80211A:
2255                 IWL_DEBUG_RATE("Select A mode rate scale\n");
2256                 /* If one of the following CCK rates is used,
2257                  * have it fall back to the 6M OFDM rate */
2258                 for (i = IWL_RATE_1M_INDEX_TABLE; i <= IWL_RATE_11M_INDEX_TABLE; i++)
2259                         table[i].next_rate_index = iwl3945_rates[IWL_FIRST_OFDM_RATE].table_rs_index;
2260
2261                 /* Don't fall back to CCK rates */
2262                 table[IWL_RATE_12M_INDEX_TABLE].next_rate_index = IWL_RATE_9M_INDEX_TABLE;
2263
2264                 /* Don't drop out of OFDM rates */
2265                 table[IWL_RATE_6M_INDEX_TABLE].next_rate_index =
2266                     iwl3945_rates[IWL_FIRST_OFDM_RATE].table_rs_index;
2267                 break;
2268
2269         case MODE_IEEE80211B:
2270                 IWL_DEBUG_RATE("Select B mode rate scale\n");
2271                 /* If an OFDM rate is used, have it fall back to the
2272                  * 1M CCK rates */
2273                 for (i = IWL_RATE_6M_INDEX_TABLE; i <= IWL_RATE_54M_INDEX_TABLE; i++)
2274                         table[i].next_rate_index = iwl3945_rates[IWL_FIRST_CCK_RATE].table_rs_index;
2275
2276                 /* CCK shouldn't fall back to OFDM... */
2277                 table[IWL_RATE_11M_INDEX_TABLE].next_rate_index = IWL_RATE_5M_INDEX_TABLE;
2278                 break;
2279
2280         default:
2281                 IWL_DEBUG_RATE("Select G mode rate scale\n");
2282                 break;
2283         }
2284
2285         /* Update the rate scaling for control frame Tx */
2286         rate_cmd.table_id = 0;
2287         rc = iwl3945_send_cmd_pdu(priv, REPLY_RATE_SCALE, sizeof(rate_cmd),
2288                               &rate_cmd);
2289         if (rc)
2290                 return rc;
2291
2292         /* Update the rate scaling for data frame Tx */
2293         rate_cmd.table_id = 1;
2294         return iwl3945_send_cmd_pdu(priv, REPLY_RATE_SCALE, sizeof(rate_cmd),
2295                                 &rate_cmd);
2296 }
2297
2298 /* Called when initializing driver */
2299 int iwl3945_hw_set_hw_setting(struct iwl3945_priv *priv)
2300 {
2301         memset((void *)&priv->hw_setting, 0,
2302                sizeof(struct iwl3945_driver_hw_info));
2303
2304         priv->hw_setting.shared_virt =
2305             pci_alloc_consistent(priv->pci_dev,
2306                                  sizeof(struct iwl3945_shared),
2307                                  &priv->hw_setting.shared_phys);
2308
2309         if (!priv->hw_setting.shared_virt) {
2310                 IWL_ERROR("failed to allocate pci memory\n");
2311                 mutex_unlock(&priv->mutex);
2312                 return -ENOMEM;
2313         }
2314
2315         priv->hw_setting.ac_queue_count = AC_NUM;
2316         priv->hw_setting.rx_buf_size = IWL_RX_BUF_SIZE;
2317         priv->hw_setting.max_pkt_size = 2342;
2318         priv->hw_setting.tx_cmd_len = sizeof(struct iwl3945_tx_cmd);
2319         priv->hw_setting.max_rxq_size = RX_QUEUE_SIZE;
2320         priv->hw_setting.max_rxq_log = RX_QUEUE_SIZE_LOG;
2321         priv->hw_setting.max_stations = IWL3945_STATION_COUNT;
2322         priv->hw_setting.bcast_sta_id = IWL3945_BROADCAST_ID;
2323         return 0;
2324 }
2325
2326 unsigned int iwl3945_hw_get_beacon_cmd(struct iwl3945_priv *priv,
2327                           struct iwl3945_frame *frame, u8 rate)
2328 {
2329         struct iwl3945_tx_beacon_cmd *tx_beacon_cmd;
2330         unsigned int frame_size;
2331
2332         tx_beacon_cmd = (struct iwl3945_tx_beacon_cmd *)&frame->u;
2333         memset(tx_beacon_cmd, 0, sizeof(*tx_beacon_cmd));
2334
2335         tx_beacon_cmd->tx.sta_id = IWL3945_BROADCAST_ID;
2336         tx_beacon_cmd->tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2337
2338         frame_size = iwl3945_fill_beacon_frame(priv,
2339                                 tx_beacon_cmd->frame,
2340                                 iwl3945_broadcast_addr,
2341                                 sizeof(frame->u) - sizeof(*tx_beacon_cmd));
2342
2343         BUG_ON(frame_size > MAX_MPDU_SIZE);
2344         tx_beacon_cmd->tx.len = cpu_to_le16((u16)frame_size);
2345
2346         tx_beacon_cmd->tx.rate = rate;
2347         tx_beacon_cmd->tx.tx_flags = (TX_CMD_FLG_SEQ_CTL_MSK |
2348                                       TX_CMD_FLG_TSF_MSK);
2349
2350         /* supp_rates[0] == OFDM start at IWL_FIRST_OFDM_RATE*/
2351         tx_beacon_cmd->tx.supp_rates[0] =
2352                 (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
2353
2354         tx_beacon_cmd->tx.supp_rates[1] =
2355                 (IWL_CCK_BASIC_RATES_MASK & 0xF);
2356
2357         return (sizeof(struct iwl3945_tx_beacon_cmd) + frame_size);
2358 }
2359
2360 void iwl3945_hw_rx_handler_setup(struct iwl3945_priv *priv)
2361 {
2362         priv->rx_handlers[REPLY_3945_RX] = iwl3945_rx_reply_rx;
2363 }
2364
2365 void iwl3945_hw_setup_deferred_work(struct iwl3945_priv *priv)
2366 {
2367         INIT_DELAYED_WORK(&priv->thermal_periodic,
2368                           iwl3945_bg_reg_txpower_periodic);
2369 }
2370
2371 void iwl3945_hw_cancel_deferred_work(struct iwl3945_priv *priv)
2372 {
2373         cancel_delayed_work(&priv->thermal_periodic);
2374 }
2375
2376 struct pci_device_id iwl3945_hw_card_ids[] = {
2377         {PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x4222)},
2378         {PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x4227)},
2379         {0}
2380 };
2381
2382 /*
2383  * Clear the OWNER_MSK, to establish driver (instead of uCode running on
2384  * embedded controller) as EEPROM reader; each read is a series of pulses
2385  * to/from the EEPROM chip, not a single event, so even reads could conflict
2386  * if they weren't arbitrated by some ownership mechanism.  Here, the driver
2387  * simply claims ownership, which should be safe when this function is called
2388  * (i.e. before loading uCode!).
2389  */
2390 inline int iwl3945_eeprom_acquire_semaphore(struct iwl3945_priv *priv)
2391 {
2392         _iwl3945_clear_bit(priv, CSR_EEPROM_GP, CSR_EEPROM_GP_IF_OWNER_MSK);
2393         return 0;
2394 }
2395
2396 MODULE_DEVICE_TABLE(pci, iwl3945_hw_card_ids);