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

   1 /******************************************************************************
   2  *
   3  * This file is provided under a dual BSD/GPLv2 license.  When using or
   4  * redistributing this file, you may do so under either license.
   5  *
   6  * GPL LICENSE SUMMARY
   7  *
   8  * Copyright(c) 2008 Intel Corporation. All rights reserved.
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of version 2 of the GNU General Public License as
  12  * published by the Free Software Foundation.
  13  *
  14  * This program is distributed in the hope that it will be useful, but
  15  * WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17  * General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
  22  * USA
  23  *
  24  * The full GNU General Public License is included in this distribution
  25  * in the file called LICENSE.GPL.
  26  *
  27  * Contact Information:
  28  * Tomas Winkler <tomas.winkler@intel.com>
  29  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  30  *
  31  * BSD LICENSE
  32  *
  33  * Copyright(c) 2005 - 2008 Intel Corporation. All rights reserved.
  34  * All rights reserved.
  35  *
  36  * Redistribution and use in source and binary forms, with or without
  37  * modification, are permitted provided that the following conditions
  38  * are met:
  39  *
  40  *  * Redistributions of source code must retain the above copyright
  41  *    notice, this list of conditions and the following disclaimer.
  42  *  * Redistributions in binary form must reproduce the above copyright
  43  *    notice, this list of conditions and the following disclaimer in
  44  *    the documentation and/or other materials provided with the
  45  *    distribution.
  46  *  * Neither the name Intel Corporation nor the names of its
  47  *    contributors may be used to endorse or promote products derived
  48  *    from this software without specific prior written permission.
  49  *
  50  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  51  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  52  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  53  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  54  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  55  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  56  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  57  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  58  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  59  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  60  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  61  *****************************************************************************/
  62
  63
  64 #include <linux/kernel.h>
  65 #include <linux/module.h>
  66 #include <linux/init.h>
  67
  68 #include <net/mac80211.h>
  69
  70 #include "iwl-commands.h"
  71 #include "iwl-dev.h"
  72 #include "iwl-core.h"
  73 #include "iwl-debug.h"
  74 #include "iwl-eeprom.h"
  75 #include "iwl-io.h"
  76
  77 /************************** EEPROM BANDS ****************************
  78  *
  79  * The iwl_eeprom_band definitions below provide the mapping from the
  80  * EEPROM contents to the specific channel number supported for each
  81  * band.
  82  *
  83  * For example, iwl_priv->eeprom.band_3_channels[4] from the band_3
  84  * definition below maps to physical channel 42 in the 5.2GHz spectrum.
  85  * The specific geography and calibration information for that channel
  86  * is contained in the eeprom map itself.
  87  *
  88  * During init, we copy the eeprom information and channel map
  89  * information into priv->channel_info_24/52 and priv->channel_map_24/52
  90  *
  91  * channel_map_24/52 provides the index in the channel_info array for a
  92  * given channel.  We have to have two separate maps as there is channel
  93  * overlap with the 2.4GHz and 5.2GHz spectrum as seen in band_1 and
  94  * band_2
  95  *
  96  * A value of 0xff stored in the channel_map indicates that the channel
  97  * is not supported by the hardware at all.
  98  *
  99  * A value of 0xfe in the channel_map indicates that the channel is not
 100  * valid for Tx with the current hardware.  This means that
 101  * while the system can tune and receive on a given channel, it may not
 102  * be able to associate or transmit any frames on that
 103  * channel.  There is no corresponding channel information for that
 104  * entry.
 105  *
 106  *********************************************************************/
 107
 108 /* 2.4 GHz */
 109 const u8 iwl_eeprom_band_1[14] = {
 110         1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14
 111 };
 112
 113 /* 5.2 GHz bands */
 114 static const u8 iwl_eeprom_band_2[] = { /* 4915-5080MHz */
 115         183, 184, 185, 187, 188, 189, 192, 196, 7, 8, 11, 12, 16
 116 };
 117
 118 static const u8 iwl_eeprom_band_3[] = { /* 5170-5320MHz */
 119         34, 36, 38, 40, 42, 44, 46, 48, 52, 56, 60, 64
 120 };
 121
 122 static const u8 iwl_eeprom_band_4[] = { /* 5500-5700MHz */
 123         100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140
 124 };
 125
 126 static const u8 iwl_eeprom_band_5[] = { /* 5725-5825MHz */
 127         145, 149, 153, 157, 161, 165
 128 };
 129
 130 static const u8 iwl_eeprom_band_6[] = {       /* 2.4 FAT channel */
 131         1, 2, 3, 4, 5, 6, 7
 132 };
 133
 134 static const u8 iwl_eeprom_band_7[] = {       /* 5.2 FAT channel */
 135         36, 44, 52, 60, 100, 108, 116, 124, 132, 149, 157
 136 };
 137
 138 /******************************************************************************
 139  *
 140  * EEPROM related functions
 141  *
 142 ******************************************************************************/
 143
 144 int iwlcore_eeprom_verify_signature(struct iwl_priv *priv)
 145 {
 146         u32 gp = iwl_read32(priv, CSR_EEPROM_GP);
 147         if ((gp & CSR_EEPROM_GP_VALID_MSK) == CSR_EEPROM_GP_BAD_SIGNATURE) {
 148                 IWL_ERROR("EEPROM not found, EEPROM_GP=0x%08x\n", gp);
 149                 return -ENOENT;
 150         }
 151         return 0;
 152 }
 153 EXPORT_SYMBOL(iwlcore_eeprom_verify_signature);
 154
 155 /*
 156  * The device's EEPROM semaphore prevents conflicts between driver and uCode
 157  * when accessing the EEPROM; each access is a series of pulses to/from the
 158  * EEPROM chip, not a single event, so even reads could conflict if they
 159  * weren't arbitrated by the semaphore.
 160  */
 161 int iwlcore_eeprom_acquire_semaphore(struct iwl_priv *priv)
 162 {
 163         u16 count;
 164         int ret;
 165
 166         for (count = 0; count < EEPROM_SEM_RETRY_LIMIT; count++) {
 167                 /* Request semaphore */
 168                 iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
 169                             CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM);
 170
 171                 /* See if we got it */
 172                 ret = iwl_poll_direct_bit(priv, CSR_HW_IF_CONFIG_REG,
 173                                 CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM,
 174                                 EEPROM_SEM_TIMEOUT);
 175                 if (ret >= 0) {
 176                         IWL_DEBUG_IO("Acquired semaphore after %d tries.\n",
 177                                 count+1);
 178                         return ret;
 179                 }
 180         }
 181
 182         return ret;
 183 }
 184 EXPORT_SYMBOL(iwlcore_eeprom_acquire_semaphore);
 185
 186 void iwlcore_eeprom_release_semaphore(struct iwl_priv *priv)
 187 {
 188         iwl_clear_bit(priv, CSR_HW_IF_CONFIG_REG,
 189                 CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM);
 190
 191 }
 192 EXPORT_SYMBOL(iwlcore_eeprom_release_semaphore);
 193
 194 const u8 *iwlcore_eeprom_query_addr(const struct iwl_priv *priv, size_t offset)
 195 {
 196         BUG_ON(offset >= priv->cfg->eeprom_size);
 197         return &priv->eeprom[offset];
 198 }
 199 EXPORT_SYMBOL(iwlcore_eeprom_query_addr);
 200
 201 /**
 202  * iwl_eeprom_init - read EEPROM contents
 203  *
 204  * Load the EEPROM contents from adapter into priv->eeprom
 205  *
 206  * NOTE:  This routine uses the non-debug IO access functions.
 207  */
 208 int iwl_eeprom_init(struct iwl_priv *priv)
 209 {
 210         u16 *e;
 211         u32 gp = iwl_read32(priv, CSR_EEPROM_GP);
 212         u32 r;
 213         int sz = priv->cfg->eeprom_size;
 214         int ret;
 215         int i;
 216         u16 addr;
 217
 218         /* allocate eeprom */
 219         priv->eeprom = kzalloc(sz, GFP_KERNEL);
 220         if (!priv->eeprom) {
 221                 ret = -ENOMEM;
 222                 goto alloc_err;
 223         }
 224         e = (u16 *)priv->eeprom;
 225
 226         ret = priv->cfg->ops->lib->eeprom_ops.verify_signature(priv);
 227         if (ret < 0) {
 228                 IWL_ERROR("EEPROM not found, EEPROM_GP=0x%08x\n", gp);
 229                 ret = -ENOENT;
 230                 goto err;
 231         }
 232
 233         /* Make sure driver (instead of uCode) is allowed to read EEPROM */
 234         ret = priv->cfg->ops->lib->eeprom_ops.acquire_semaphore(priv);
 235         if (ret < 0) {
 236                 IWL_ERROR("Failed to acquire EEPROM semaphore.\n");
 237                 ret = -ENOENT;
 238                 goto err;
 239         }
 240
 241         /* eeprom is an array of 16bit values */
 242         for (addr = 0; addr < sz; addr += sizeof(u16)) {
 243                 _iwl_write32(priv, CSR_EEPROM_REG, addr << 1);
 244                 _iwl_clear_bit(priv, CSR_EEPROM_REG, CSR_EEPROM_REG_BIT_CMD);
 245
 246                 for (i = 0; i < IWL_EEPROM_ACCESS_TIMEOUT;
 247                                         i += IWL_EEPROM_ACCESS_DELAY) {
 248                         r = _iwl_read_direct32(priv, CSR_EEPROM_REG);
 249                         if (r & CSR_EEPROM_REG_READ_VALID_MSK)
 250                                 break;
 251                         udelay(IWL_EEPROM_ACCESS_DELAY);
 252                 }
 253
 254                 if (!(r & CSR_EEPROM_REG_READ_VALID_MSK)) {
 255                         IWL_ERROR("Time out reading EEPROM[%d]\n", addr);
 256                         ret = -ETIMEDOUT;
 257                         goto done;
 258                 }
 259                 e[addr / 2] = le16_to_cpu((__force __le16)(r >> 16));
 260         }
 261         ret = 0;
 262 done:
 263         priv->cfg->ops->lib->eeprom_ops.release_semaphore(priv);
 264 err:
 265         if (ret)
 266                 kfree(priv->eeprom);
 267 alloc_err:
 268         return ret;
 269 }
 270 EXPORT_SYMBOL(iwl_eeprom_init);
 271
 272 void iwl_eeprom_free(struct iwl_priv *priv)
 273 {
 274         kfree(priv->eeprom);
 275         priv->eeprom = NULL;
 276 }
 277 EXPORT_SYMBOL(iwl_eeprom_free);
 278
 279 int iwl_eeprom_check_version(struct iwl_priv *priv)
 280 {
 281         u16 eeprom_ver;
 282         u16 calib_ver;
 283
 284         eeprom_ver = iwl_eeprom_query16(priv, EEPROM_VERSION);
 285         calib_ver = priv->cfg->ops->lib->eeprom_ops.calib_version(priv);
 286
 287         if (eeprom_ver < priv->cfg->eeprom_ver ||
 288             calib_ver < priv->cfg->eeprom_calib_ver)
 289                 goto err;
 290
 291         return 0;
 292 err:
 293         IWL_ERROR("Unsupported EEPROM VER=0x%x < 0x%x CALIB=0x%x < 0x%x\n",
 294                   eeprom_ver, priv->cfg->eeprom_ver,
 295                   calib_ver,  priv->cfg->eeprom_calib_ver);
 296         return -EINVAL;
 297
 298 }
 299 EXPORT_SYMBOL(iwl_eeprom_check_version);
 300
 301 const u8 *iwl_eeprom_query_addr(const struct iwl_priv *priv, size_t offset)
 302 {
 303         return priv->cfg->ops->lib->eeprom_ops.query_addr(priv, offset);
 304 }
 305 EXPORT_SYMBOL(iwl_eeprom_query_addr);
 306
 307 u16 iwl_eeprom_query16(const struct iwl_priv *priv, size_t offset)
 308 {
 309         return (u16)priv->eeprom[offset] | ((u16)priv->eeprom[offset + 1] << 8);
 310 }
 311 EXPORT_SYMBOL(iwl_eeprom_query16);
 312
 313 void iwl_eeprom_get_mac(const struct iwl_priv *priv, u8 *mac)
 314 {
 315         const u8 *addr = priv->cfg->ops->lib->eeprom_ops.query_addr(priv,
 316                                         EEPROM_MAC_ADDRESS);
 317         memcpy(mac, addr, ETH_ALEN);
 318 }
 319 EXPORT_SYMBOL(iwl_eeprom_get_mac);
 320
 321 static void iwl_init_band_reference(const struct iwl_priv *priv,
 322                         int eep_band, int *eeprom_ch_count,
 323                         const struct iwl_eeprom_channel **eeprom_ch_info,
 324                         const u8 **eeprom_ch_index)
 325 {
 326         u32 offset = priv->cfg->ops->lib->
 327                         eeprom_ops.regulatory_bands[eep_band - 1];
 328         switch (eep_band) {
 329         case 1:         /* 2.4GHz band */
 330                 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_1);
 331                 *eeprom_ch_info = (struct iwl_eeprom_channel *)
 332                                 iwl_eeprom_query_addr(priv, offset);
 333                 *eeprom_ch_index = iwl_eeprom_band_1;
 334                 break;
 335         case 2:         /* 4.9GHz band */
 336                 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_2);
 337                 *eeprom_ch_info = (struct iwl_eeprom_channel *)
 338                                 iwl_eeprom_query_addr(priv, offset);
 339                 *eeprom_ch_index = iwl_eeprom_band_2;
 340                 break;
 341         case 3:         /* 5.2GHz band */
 342                 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_3);
 343                 *eeprom_ch_info = (struct iwl_eeprom_channel *)
 344                                 iwl_eeprom_query_addr(priv, offset);
 345                 *eeprom_ch_index = iwl_eeprom_band_3;
 346                 break;
 347         case 4:         /* 5.5GHz band */
 348                 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_4);
 349                 *eeprom_ch_info = (struct iwl_eeprom_channel *)
 350                                 iwl_eeprom_query_addr(priv, offset);
 351                 *eeprom_ch_index = iwl_eeprom_band_4;
 352                 break;
 353         case 5:         /* 5.7GHz band */
 354                 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_5);
 355                 *eeprom_ch_info = (struct iwl_eeprom_channel *)
 356                                 iwl_eeprom_query_addr(priv, offset);
 357                 *eeprom_ch_index = iwl_eeprom_band_5;
 358                 break;
 359         case 6:         /* 2.4GHz FAT channels */
 360                 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_6);
 361                 *eeprom_ch_info = (struct iwl_eeprom_channel *)
 362                                 iwl_eeprom_query_addr(priv, offset);
 363                 *eeprom_ch_index = iwl_eeprom_band_6;
 364                 break;
 365         case 7:         /* 5 GHz FAT channels */
 366                 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_7);
 367                 *eeprom_ch_info = (struct iwl_eeprom_channel *)
 368                                 iwl_eeprom_query_addr(priv, offset);
 369                 *eeprom_ch_index = iwl_eeprom_band_7;
 370                 break;
 371         default:
 372                 BUG();
 373                 return;
 374         }
 375 }
 376
 377 #define CHECK_AND_PRINT(x) ((eeprom_ch->flags & EEPROM_CHANNEL_##x) \
 378                             ? # x " " : "")
 379
 380 /**
 381  * iwl_set_fat_chan_info - Copy fat channel info into driver's priv.
 382  *
 383  * Does not set up a command, or touch hardware.
 384  */
 385 static int iwl_set_fat_chan_info(struct iwl_priv *priv,
 386                               enum ieee80211_band band, u16 channel,
 387                               const struct iwl_eeprom_channel *eeprom_ch,
 388                               u8 fat_extension_channel)
 389 {
 390         struct iwl_channel_info *ch_info;
 391
 392         ch_info = (struct iwl_channel_info *)
 393                         iwl_get_channel_info(priv, band, channel);
 394
 395         if (!is_channel_valid(ch_info))
 396                 return -1;
 397
 398         IWL_DEBUG_INFO("FAT Ch. %d [%sGHz] %s%s%s%s%s(0x%02x %ddBm):"
 399                         " Ad-Hoc %ssupported\n",
 400                         ch_info->channel,
 401                         is_channel_a_band(ch_info) ?
 402                         "5.2" : "2.4",
 403                         CHECK_AND_PRINT(IBSS),
 404                         CHECK_AND_PRINT(ACTIVE),
 405                         CHECK_AND_PRINT(RADAR),
 406                         CHECK_AND_PRINT(WIDE),
 407                         CHECK_AND_PRINT(DFS),
 408                         eeprom_ch->flags,
 409                         eeprom_ch->max_power_avg,
 410                         ((eeprom_ch->flags & EEPROM_CHANNEL_IBSS)
 411                          && !(eeprom_ch->flags & EEPROM_CHANNEL_RADAR)) ?
 412                         "" : "not ");
 413
 414         ch_info->fat_eeprom = *eeprom_ch;
 415         ch_info->fat_max_power_avg = eeprom_ch->max_power_avg;
 416         ch_info->fat_curr_txpow = eeprom_ch->max_power_avg;
 417         ch_info->fat_min_power = 0;
 418         ch_info->fat_scan_power = eeprom_ch->max_power_avg;
 419         ch_info->fat_flags = eeprom_ch->flags;
 420         ch_info->fat_extension_channel = fat_extension_channel;
 421
 422         return 0;
 423 }
 424
 425 #define CHECK_AND_PRINT_I(x) ((eeprom_ch_info[ch].flags & EEPROM_CHANNEL_##x) \
 426                             ? # x " " : "")
 427
 428 /**
 429  * iwl_init_channel_map - Set up driver's info for all possible channels
 430  */
 431 int iwl_init_channel_map(struct iwl_priv *priv)
 432 {
 433         int eeprom_ch_count = 0;
 434         const u8 *eeprom_ch_index = NULL;
 435         const struct iwl_eeprom_channel *eeprom_ch_info = NULL;
 436         int band, ch;
 437         struct iwl_channel_info *ch_info;
 438
 439         if (priv->channel_count) {
 440                 IWL_DEBUG_INFO("Channel map already initialized.\n");
 441                 return 0;
 442         }
 443
 444         IWL_DEBUG_INFO("Initializing regulatory info from EEPROM\n");
 445
 446         priv->channel_count =
 447             ARRAY_SIZE(iwl_eeprom_band_1) +
 448             ARRAY_SIZE(iwl_eeprom_band_2) +
 449             ARRAY_SIZE(iwl_eeprom_band_3) +
 450             ARRAY_SIZE(iwl_eeprom_band_4) +
 451             ARRAY_SIZE(iwl_eeprom_band_5);
 452
 453         IWL_DEBUG_INFO("Parsing data for %d channels.\n", priv->channel_count);
 454
 455         priv->channel_info = kzalloc(sizeof(struct iwl_channel_info) *
 456                                      priv->channel_count, GFP_KERNEL);
 457         if (!priv->channel_info) {
 458                 IWL_ERROR("Could not allocate channel_info\n");
 459                 priv->channel_count = 0;
 460                 return -ENOMEM;
 461         }
 462
 463         ch_info = priv->channel_info;
 464
 465         /* Loop through the 5 EEPROM bands adding them in order to the
 466          * channel map we maintain (that contains additional information than
 467          * what just in the EEPROM) */
 468         for (band = 1; band <= 5; band++) {
 469
 470                 iwl_init_band_reference(priv, band, &eeprom_ch_count,
 471                                         &eeprom_ch_info, &eeprom_ch_index);
 472
 473                 /* Loop through each band adding each of the channels */
 474                 for (ch = 0; ch < eeprom_ch_count; ch++) {
 475                         ch_info->channel = eeprom_ch_index[ch];
 476                         ch_info->band = (band == 1) ? IEEE80211_BAND_2GHZ :
 477                             IEEE80211_BAND_5GHZ;
 478
 479                         /* permanently store EEPROM's channel regulatory flags
 480                          *   and max power in channel info database. */
 481                         ch_info->eeprom = eeprom_ch_info[ch];
 482
 483                         /* Copy the run-time flags so they are there even on
 484                          * invalid channels */
 485                         ch_info->flags = eeprom_ch_info[ch].flags;
 486                         /* First write that fat is not enabled, and then enable
 487                          * one by one */
 488                         ch_info->fat_extension_channel =
 489                                 (IEEE80211_CHAN_NO_FAT_ABOVE |
 490                                  IEEE80211_CHAN_NO_FAT_BELOW);
 491
 492                         if (!(is_channel_valid(ch_info))) {
 493                                 IWL_DEBUG_INFO("Ch. %d Flags %x [%sGHz] - "
 494                                                "No traffic\n",
 495                                                ch_info->channel,
 496                                                ch_info->flags,
 497                                                is_channel_a_band(ch_info) ?
 498                                                "5.2" : "2.4");
 499                                 ch_info++;
 500                                 continue;
 501                         }
 502
 503                         /* Initialize regulatory-based run-time data */
 504                         ch_info->max_power_avg = ch_info->curr_txpow =
 505                             eeprom_ch_info[ch].max_power_avg;
 506                         ch_info->scan_power = eeprom_ch_info[ch].max_power_avg;
 507                         ch_info->min_power = 0;
 508
 509                         IWL_DEBUG_INFO("Ch. %d [%sGHz] %s%s%s%s%s%s(0x%02x %ddBm):"
 510                                        " Ad-Hoc %ssupported\n",
 511                                        ch_info->channel,
 512                                        is_channel_a_band(ch_info) ?
 513                                        "5.2" : "2.4",
 514                                        CHECK_AND_PRINT_I(VALID),
 515                                        CHECK_AND_PRINT_I(IBSS),
 516                                        CHECK_AND_PRINT_I(ACTIVE),
 517                                        CHECK_AND_PRINT_I(RADAR),
 518                                        CHECK_AND_PRINT_I(WIDE),
 519                                        CHECK_AND_PRINT_I(DFS),
 520                                        eeprom_ch_info[ch].flags,
 521                                        eeprom_ch_info[ch].max_power_avg,
 522                                        ((eeprom_ch_info[ch].
 523                                          flags & EEPROM_CHANNEL_IBSS)
 524                                         && !(eeprom_ch_info[ch].
 525                                              flags & EEPROM_CHANNEL_RADAR))
 526                                        ? "" : "not ");
 527
 528                         /* Set the user_txpower_limit to the highest power
 529                          * supported by any channel */
 530                         if (eeprom_ch_info[ch].max_power_avg >
 531                                                 priv->tx_power_user_lmt)
 532                                 priv->tx_power_user_lmt =
 533                                     eeprom_ch_info[ch].max_power_avg;
 534
 535                         ch_info++;
 536                 }
 537         }
 538
 539         /* Two additional EEPROM bands for 2.4 and 5 GHz FAT channels */
 540         for (band = 6; band <= 7; band++) {
 541                 enum ieee80211_band ieeeband;
 542                 u8 fat_extension_chan;
 543
 544                 iwl_init_band_reference(priv, band, &eeprom_ch_count,
 545                                         &eeprom_ch_info, &eeprom_ch_index);
 546
 547                 /* EEPROM band 6 is 2.4, band 7 is 5 GHz */
 548                 ieeeband =
 549                         (band == 6) ? IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ;
 550
 551                 /* Loop through each band adding each of the channels */
 552                 for (ch = 0; ch < eeprom_ch_count; ch++) {
 553
 554                         if ((band == 6) &&
 555                                 ((eeprom_ch_index[ch] == 5) ||
 556                                  (eeprom_ch_index[ch] == 6) ||
 557                                  (eeprom_ch_index[ch] == 7)))
 558                                 /* both are allowed: above and below */
 559                                 fat_extension_chan = 0;
 560                         else
 561                                 fat_extension_chan =
 562                                         IEEE80211_CHAN_NO_FAT_BELOW;
 563
 564                         /* Set up driver's info for lower half */
 565                         iwl_set_fat_chan_info(priv, ieeeband,
 566                                                 eeprom_ch_index[ch],
 567                                                 &(eeprom_ch_info[ch]),
 568                                                 fat_extension_chan);
 569
 570                         /* Set up driver's info for upper half */
 571                         iwl_set_fat_chan_info(priv, ieeeband,
 572                                                 (eeprom_ch_index[ch] + 4),
 573                                                 &(eeprom_ch_info[ch]),
 574                                                 IEEE80211_CHAN_NO_FAT_ABOVE);
 575                 }
 576         }
 577
 578         return 0;
 579 }
 580 EXPORT_SYMBOL(iwl_init_channel_map);
 581
 582 /*
 583  * iwl_free_channel_map - undo allocations in iwl_init_channel_map
 584  */
 585 void iwl_free_channel_map(struct iwl_priv *priv)
 586 {
 587         kfree(priv->channel_info);
 588         priv->channel_count = 0;
 589 }
 590
 591 /**
 592  * iwl_get_channel_info - Find driver's private channel info
 593  *
 594  * Based on band and channel number.
 595  */
 596 const struct iwl_channel_info *iwl_get_channel_info(const struct iwl_priv *priv,
 597                                         enum ieee80211_band band, u16 channel)
 598 {
 599         int i;
 600
 601         switch (band) {
 602         case IEEE80211_BAND_5GHZ:
 603                 for (i = 14; i < priv->channel_count; i++) {
 604                         if (priv->channel_info[i].channel == channel)
 605                                 return &priv->channel_info[i];
 606                 }
 607                 break;
 608         case IEEE80211_BAND_2GHZ:
 609                 if (channel >= 1 && channel <= 14)
 610                         return &priv->channel_info[channel - 1];
 611                 break;
 612         default:
 613                 BUG();
 614         }
 615
 616         return NULL;
 617 }
 618 EXPORT_SYMBOL(iwl_get_channel_info);
 619