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_bit(priv, CSR_HW_IF_CONFIG_REG,
 173                                    CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM,
 174                                    CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM,
 175                                    EEPROM_SEM_TIMEOUT);
 176                 if (ret >= 0) {
 177                         IWL_DEBUG_IO("Acquired semaphore after %d tries.\n",
 178                                 count+1);
 179                         return ret;
 180                 }
 181         }
 182
 183         return ret;
 184 }
 185 EXPORT_SYMBOL(iwlcore_eeprom_acquire_semaphore);
 186
 187 void iwlcore_eeprom_release_semaphore(struct iwl_priv *priv)
 188 {
 189         iwl_clear_bit(priv, CSR_HW_IF_CONFIG_REG,
 190                 CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM);
 191
 192 }
 193 EXPORT_SYMBOL(iwlcore_eeprom_release_semaphore);
 194
 195 const u8 *iwlcore_eeprom_query_addr(const struct iwl_priv *priv, size_t offset)
 196 {
 197         BUG_ON(offset >= priv->cfg->eeprom_size);
 198         return &priv->eeprom[offset];
 199 }
 200 EXPORT_SYMBOL(iwlcore_eeprom_query_addr);
 201
 202 /**
 203  * iwl_eeprom_init - read EEPROM contents
 204  *
 205  * Load the EEPROM contents from adapter into priv->eeprom
 206  *
 207  * NOTE:  This routine uses the non-debug IO access functions.
 208  */
 209 int iwl_eeprom_init(struct iwl_priv *priv)
 210 {
 211         u16 *e;
 212         u32 gp = iwl_read32(priv, CSR_EEPROM_GP);
 213         u32 r;
 214         int sz = priv->cfg->eeprom_size;
 215         int ret;
 216         int i;
 217         u16 addr;
 218
 219         /* allocate eeprom */
 220         priv->eeprom = kzalloc(sz, GFP_KERNEL);
 221         if (!priv->eeprom) {
 222                 ret = -ENOMEM;
 223                 goto alloc_err;
 224         }
 225         e = (u16 *)priv->eeprom;
 226
 227         ret = priv->cfg->ops->lib->eeprom_ops.verify_signature(priv);
 228         if (ret < 0) {
 229                 IWL_ERROR("EEPROM not found, EEPROM_GP=0x%08x\n", gp);
 230                 ret = -ENOENT;
 231                 goto err;
 232         }
 233
 234         /* Make sure driver (instead of uCode) is allowed to read EEPROM */
 235         ret = priv->cfg->ops->lib->eeprom_ops.acquire_semaphore(priv);
 236         if (ret < 0) {
 237                 IWL_ERROR("Failed to acquire EEPROM semaphore.\n");
 238                 ret = -ENOENT;
 239                 goto err;
 240         }
 241
 242         /* eeprom is an array of 16bit values */
 243         for (addr = 0; addr < sz; addr += sizeof(u16)) {
 244                 _iwl_write32(priv, CSR_EEPROM_REG, addr << 1);
 245                 _iwl_clear_bit(priv, CSR_EEPROM_REG, CSR_EEPROM_REG_BIT_CMD);
 246
 247                 for (i = 0; i < IWL_EEPROM_ACCESS_TIMEOUT;
 248                                         i += IWL_EEPROM_ACCESS_DELAY) {
 249                         r = _iwl_read_direct32(priv, CSR_EEPROM_REG);
 250                         if (r & CSR_EEPROM_REG_READ_VALID_MSK)
 251                                 break;
 252                         udelay(IWL_EEPROM_ACCESS_DELAY);
 253                 }
 254
 255                 if (!(r & CSR_EEPROM_REG_READ_VALID_MSK)) {
 256                         IWL_ERROR("Time out reading EEPROM[%d]\n", addr);
 257                         ret = -ETIMEDOUT;
 258                         goto done;
 259                 }
 260                 e[addr / 2] = le16_to_cpu((__force __le16)(r >> 16));
 261         }
 262         ret = 0;
 263 done:
 264         priv->cfg->ops->lib->eeprom_ops.release_semaphore(priv);
 265 err:
 266         if (ret)
 267                 kfree(priv->eeprom);
 268 alloc_err:
 269         return ret;
 270 }
 271 EXPORT_SYMBOL(iwl_eeprom_init);
 272
 273 void iwl_eeprom_free(struct iwl_priv *priv)
 274 {
 275         kfree(priv->eeprom);
 276         priv->eeprom = NULL;
 277 }
 278 EXPORT_SYMBOL(iwl_eeprom_free);
 279
 280 int iwl_eeprom_check_version(struct iwl_priv *priv)
 281 {
 282         return priv->cfg->ops->lib->eeprom_ops.check_version(priv);
 283 }
 284 EXPORT_SYMBOL(iwl_eeprom_check_version);
 285
 286 const u8 *iwl_eeprom_query_addr(const struct iwl_priv *priv, size_t offset)
 287 {
 288         return priv->cfg->ops->lib->eeprom_ops.query_addr(priv, offset);
 289 }
 290 EXPORT_SYMBOL(iwl_eeprom_query_addr);
 291
 292 u16 iwl_eeprom_query16(const struct iwl_priv *priv, size_t offset)
 293 {
 294         return (u16)priv->eeprom[offset] | ((u16)priv->eeprom[offset + 1] << 8);
 295 }
 296 EXPORT_SYMBOL(iwl_eeprom_query16);
 297
 298 void iwl_eeprom_get_mac(const struct iwl_priv *priv, u8 *mac)
 299 {
 300         const u8 *addr = priv->cfg->ops->lib->eeprom_ops.query_addr(priv,
 301                                         EEPROM_MAC_ADDRESS);
 302         memcpy(mac, addr, ETH_ALEN);
 303 }
 304 EXPORT_SYMBOL(iwl_eeprom_get_mac);
 305
 306 static void iwl_init_band_reference(const struct iwl_priv *priv,
 307                         int eep_band, int *eeprom_ch_count,
 308                         const struct iwl_eeprom_channel **eeprom_ch_info,
 309                         const u8 **eeprom_ch_index)
 310 {
 311         u32 offset = priv->cfg->ops->lib->
 312                         eeprom_ops.regulatory_bands[eep_band - 1];
 313         switch (eep_band) {
 314         case 1:         /* 2.4GHz band */
 315                 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_1);
 316                 *eeprom_ch_info = (struct iwl_eeprom_channel *)
 317                                 iwl_eeprom_query_addr(priv, offset);
 318                 *eeprom_ch_index = iwl_eeprom_band_1;
 319                 break;
 320         case 2:         /* 4.9GHz band */
 321                 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_2);
 322                 *eeprom_ch_info = (struct iwl_eeprom_channel *)
 323                                 iwl_eeprom_query_addr(priv, offset);
 324                 *eeprom_ch_index = iwl_eeprom_band_2;
 325                 break;
 326         case 3:         /* 5.2GHz band */
 327                 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_3);
 328                 *eeprom_ch_info = (struct iwl_eeprom_channel *)
 329                                 iwl_eeprom_query_addr(priv, offset);
 330                 *eeprom_ch_index = iwl_eeprom_band_3;
 331                 break;
 332         case 4:         /* 5.5GHz band */
 333                 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_4);
 334                 *eeprom_ch_info = (struct iwl_eeprom_channel *)
 335                                 iwl_eeprom_query_addr(priv, offset);
 336                 *eeprom_ch_index = iwl_eeprom_band_4;
 337                 break;
 338         case 5:         /* 5.7GHz band */
 339                 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_5);
 340                 *eeprom_ch_info = (struct iwl_eeprom_channel *)
 341                                 iwl_eeprom_query_addr(priv, offset);
 342                 *eeprom_ch_index = iwl_eeprom_band_5;
 343                 break;
 344         case 6:         /* 2.4GHz FAT channels */
 345                 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_6);
 346                 *eeprom_ch_info = (struct iwl_eeprom_channel *)
 347                                 iwl_eeprom_query_addr(priv, offset);
 348                 *eeprom_ch_index = iwl_eeprom_band_6;
 349                 break;
 350         case 7:         /* 5 GHz FAT channels */
 351                 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_7);
 352                 *eeprom_ch_info = (struct iwl_eeprom_channel *)
 353                                 iwl_eeprom_query_addr(priv, offset);
 354                 *eeprom_ch_index = iwl_eeprom_band_7;
 355                 break;
 356         default:
 357                 BUG();
 358                 return;
 359         }
 360 }
 361
 362 #define CHECK_AND_PRINT(x) ((eeprom_ch->flags & EEPROM_CHANNEL_##x) \
 363                             ? # x " " : "")
 364
 365 /**
 366  * iwl_set_fat_chan_info - Copy fat channel info into driver's priv.
 367  *
 368  * Does not set up a command, or touch hardware.
 369  */
 370 static int iwl_set_fat_chan_info(struct iwl_priv *priv,
 371                               enum ieee80211_band band, u16 channel,
 372                               const struct iwl_eeprom_channel *eeprom_ch,
 373                               u8 fat_extension_channel)
 374 {
 375         struct iwl_channel_info *ch_info;
 376
 377         ch_info = (struct iwl_channel_info *)
 378                         iwl_get_channel_info(priv, band, channel);
 379
 380         if (!is_channel_valid(ch_info))
 381                 return -1;
 382
 383         IWL_DEBUG_INFO("FAT Ch. %d [%sGHz] %s%s%s%s%s(0x%02x %ddBm):"
 384                         " Ad-Hoc %ssupported\n",
 385                         ch_info->channel,
 386                         is_channel_a_band(ch_info) ?
 387                         "5.2" : "2.4",
 388                         CHECK_AND_PRINT(IBSS),
 389                         CHECK_AND_PRINT(ACTIVE),
 390                         CHECK_AND_PRINT(RADAR),
 391                         CHECK_AND_PRINT(WIDE),
 392                         CHECK_AND_PRINT(DFS),
 393                         eeprom_ch->flags,
 394                         eeprom_ch->max_power_avg,
 395                         ((eeprom_ch->flags & EEPROM_CHANNEL_IBSS)
 396                          && !(eeprom_ch->flags & EEPROM_CHANNEL_RADAR)) ?
 397                         "" : "not ");
 398
 399         ch_info->fat_eeprom = *eeprom_ch;
 400         ch_info->fat_max_power_avg = eeprom_ch->max_power_avg;
 401         ch_info->fat_curr_txpow = eeprom_ch->max_power_avg;
 402         ch_info->fat_min_power = 0;
 403         ch_info->fat_scan_power = eeprom_ch->max_power_avg;
 404         ch_info->fat_flags = eeprom_ch->flags;
 405         ch_info->fat_extension_channel = fat_extension_channel;
 406
 407         return 0;
 408 }
 409
 410 #define CHECK_AND_PRINT_I(x) ((eeprom_ch_info[ch].flags & EEPROM_CHANNEL_##x) \
 411                             ? # x " " : "")
 412
 413 /**
 414  * iwl_init_channel_map - Set up driver's info for all possible channels
 415  */
 416 int iwl_init_channel_map(struct iwl_priv *priv)
 417 {
 418         int eeprom_ch_count = 0;
 419         const u8 *eeprom_ch_index = NULL;
 420         const struct iwl_eeprom_channel *eeprom_ch_info = NULL;
 421         int band, ch;
 422         struct iwl_channel_info *ch_info;
 423
 424         if (priv->channel_count) {
 425                 IWL_DEBUG_INFO("Channel map already initialized.\n");
 426                 return 0;
 427         }
 428
 429         IWL_DEBUG_INFO("Initializing regulatory info from EEPROM\n");
 430
 431         priv->channel_count =
 432             ARRAY_SIZE(iwl_eeprom_band_1) +
 433             ARRAY_SIZE(iwl_eeprom_band_2) +
 434             ARRAY_SIZE(iwl_eeprom_band_3) +
 435             ARRAY_SIZE(iwl_eeprom_band_4) +
 436             ARRAY_SIZE(iwl_eeprom_band_5);
 437
 438         IWL_DEBUG_INFO("Parsing data for %d channels.\n", priv->channel_count);
 439
 440         priv->channel_info = kzalloc(sizeof(struct iwl_channel_info) *
 441                                      priv->channel_count, GFP_KERNEL);
 442         if (!priv->channel_info) {
 443                 IWL_ERROR("Could not allocate channel_info\n");
 444                 priv->channel_count = 0;
 445                 return -ENOMEM;
 446         }
 447
 448         ch_info = priv->channel_info;
 449
 450         /* Loop through the 5 EEPROM bands adding them in order to the
 451          * channel map we maintain (that contains additional information than
 452          * what just in the EEPROM) */
 453         for (band = 1; band <= 5; band++) {
 454
 455                 iwl_init_band_reference(priv, band, &eeprom_ch_count,
 456                                         &eeprom_ch_info, &eeprom_ch_index);
 457
 458                 /* Loop through each band adding each of the channels */
 459                 for (ch = 0; ch < eeprom_ch_count; ch++) {
 460                         ch_info->channel = eeprom_ch_index[ch];
 461                         ch_info->band = (band == 1) ? IEEE80211_BAND_2GHZ :
 462                             IEEE80211_BAND_5GHZ;
 463
 464                         /* permanently store EEPROM's channel regulatory flags
 465                          *   and max power in channel info database. */
 466                         ch_info->eeprom = eeprom_ch_info[ch];
 467
 468                         /* Copy the run-time flags so they are there even on
 469                          * invalid channels */
 470                         ch_info->flags = eeprom_ch_info[ch].flags;
 471                         /* First write that fat is not enabled, and then enable
 472                          * one by one */
 473                         ch_info->fat_extension_channel =
 474                                 (IEEE80211_CHAN_NO_FAT_ABOVE |
 475                                  IEEE80211_CHAN_NO_FAT_BELOW);
 476
 477                         if (!(is_channel_valid(ch_info))) {
 478                                 IWL_DEBUG_INFO("Ch. %d Flags %x [%sGHz] - "
 479                                                "No traffic\n",
 480                                                ch_info->channel,
 481                                                ch_info->flags,
 482                                                is_channel_a_band(ch_info) ?
 483                                                "5.2" : "2.4");
 484                                 ch_info++;
 485                                 continue;
 486                         }
 487
 488                         /* Initialize regulatory-based run-time data */
 489                         ch_info->max_power_avg = ch_info->curr_txpow =
 490                             eeprom_ch_info[ch].max_power_avg;
 491                         ch_info->scan_power = eeprom_ch_info[ch].max_power_avg;
 492                         ch_info->min_power = 0;
 493
 494                         IWL_DEBUG_INFO("Ch. %d [%sGHz] %s%s%s%s%s%s(0x%02x %ddBm):"
 495                                        " Ad-Hoc %ssupported\n",
 496                                        ch_info->channel,
 497                                        is_channel_a_band(ch_info) ?
 498                                        "5.2" : "2.4",
 499                                        CHECK_AND_PRINT_I(VALID),
 500                                        CHECK_AND_PRINT_I(IBSS),
 501                                        CHECK_AND_PRINT_I(ACTIVE),
 502                                        CHECK_AND_PRINT_I(RADAR),
 503                                        CHECK_AND_PRINT_I(WIDE),
 504                                        CHECK_AND_PRINT_I(DFS),
 505                                        eeprom_ch_info[ch].flags,
 506                                        eeprom_ch_info[ch].max_power_avg,
 507                                        ((eeprom_ch_info[ch].
 508                                          flags & EEPROM_CHANNEL_IBSS)
 509                                         && !(eeprom_ch_info[ch].
 510                                              flags & EEPROM_CHANNEL_RADAR))
 511                                        ? "" : "not ");
 512
 513                         /* Set the user_txpower_limit to the highest power
 514                          * supported by any channel */
 515                         if (eeprom_ch_info[ch].max_power_avg >
 516                                                 priv->tx_power_user_lmt)
 517                                 priv->tx_power_user_lmt =
 518                                     eeprom_ch_info[ch].max_power_avg;
 519
 520                         ch_info++;
 521                 }
 522         }
 523
 524         /* Two additional EEPROM bands for 2.4 and 5 GHz FAT channels */
 525         for (band = 6; band <= 7; band++) {
 526                 enum ieee80211_band ieeeband;
 527                 u8 fat_extension_chan;
 528
 529                 iwl_init_band_reference(priv, band, &eeprom_ch_count,
 530                                         &eeprom_ch_info, &eeprom_ch_index);
 531
 532                 /* EEPROM band 6 is 2.4, band 7 is 5 GHz */
 533                 ieeeband =
 534                         (band == 6) ? IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ;
 535
 536                 /* Loop through each band adding each of the channels */
 537                 for (ch = 0; ch < eeprom_ch_count; ch++) {
 538
 539                         if ((band == 6) &&
 540                                 ((eeprom_ch_index[ch] == 5) ||
 541                                  (eeprom_ch_index[ch] == 6) ||
 542                                  (eeprom_ch_index[ch] == 7)))
 543                                 /* both are allowed: above and below */
 544                                 fat_extension_chan = 0;
 545                         else
 546                                 fat_extension_chan =
 547                                         IEEE80211_CHAN_NO_FAT_BELOW;
 548
 549                         /* Set up driver's info for lower half */
 550                         iwl_set_fat_chan_info(priv, ieeeband,
 551                                                 eeprom_ch_index[ch],
 552                                                 &(eeprom_ch_info[ch]),
 553                                                 fat_extension_chan);
 554
 555                         /* Set up driver's info for upper half */
 556                         iwl_set_fat_chan_info(priv, ieeeband,
 557                                                 (eeprom_ch_index[ch] + 4),
 558                                                 &(eeprom_ch_info[ch]),
 559                                                 IEEE80211_CHAN_NO_FAT_ABOVE);
 560                 }
 561         }
 562
 563         return 0;
 564 }
 565 EXPORT_SYMBOL(iwl_init_channel_map);
 566
 567 /*
 568  * iwl_free_channel_map - undo allocations in iwl_init_channel_map
 569  */
 570 void iwl_free_channel_map(struct iwl_priv *priv)
 571 {
 572         kfree(priv->channel_info);
 573         priv->channel_count = 0;
 574 }
 575
 576 /**
 577  * iwl_get_channel_info - Find driver's private channel info
 578  *
 579  * Based on band and channel number.
 580  */
 581 const struct iwl_channel_info *iwl_get_channel_info(const struct iwl_priv *priv,
 582                                         enum ieee80211_band band, u16 channel)
 583 {
 584         int i;
 585
 586         switch (band) {
 587         case IEEE80211_BAND_5GHZ:
 588                 for (i = 14; i < priv->channel_count; i++) {
 589                         if (priv->channel_info[i].channel == channel)
 590                                 return &priv->channel_info[i];
 591                 }
 592                 break;
 593         case IEEE80211_BAND_2GHZ:
 594                 if (channel >= 1 && channel <= 14)
 595                         return &priv->channel_info[channel - 1];
 596                 break;
 597         default:
 598                 BUG();
 599         }
 600
 601         return NULL;
 602 }
 603 EXPORT_SYMBOL(iwl_get_channel_info);
 604