1 /******************************************************************************
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.
8 * Copyright(c) 2008 Intel Corporation. All rights reserved.
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.
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.
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,
24 * The full GNU General Public License is included in this distribution
25 * in the file called LICENSE.GPL.
27 * Contact Information:
28 * Tomas Winkler <tomas.winkler@intel.com>
29 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
33 * Copyright(c) 2005 - 2008 Intel Corporation. All rights reserved.
34 * All rights reserved.
36 * Redistribution and use in source and binary forms, with or without
37 * modification, are permitted provided that the following conditions
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
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.
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 *****************************************************************************/
64 #include <linux/kernel.h>
65 #include <linux/module.h>
66 #include <linux/version.h>
67 #include <linux/init.h>
69 #include <net/mac80211.h>
71 #include "iwl-4965-commands.h"
74 #include "iwl-debug.h"
75 #include "iwl-eeprom.h"
78 /************************** EEPROM BANDS ****************************
80 * The iwl_eeprom_band definitions below provide the mapping from the
81 * EEPROM contents to the specific channel number supported for each
84 * For example, iwl_priv->eeprom.band_3_channels[4] from the band_3
85 * definition below maps to physical channel 42 in the 5.2GHz spectrum.
86 * The specific geography and calibration information for that channel
87 * is contained in the eeprom map itself.
89 * During init, we copy the eeprom information and channel map
90 * information into priv->channel_info_24/52 and priv->channel_map_24/52
92 * channel_map_24/52 provides the index in the channel_info array for a
93 * given channel. We have to have two separate maps as there is channel
94 * overlap with the 2.4GHz and 5.2GHz spectrum as seen in band_1 and
97 * A value of 0xff stored in the channel_map indicates that the channel
98 * is not supported by the hardware at all.
100 * A value of 0xfe in the channel_map indicates that the channel is not
101 * valid for Tx with the current hardware. This means that
102 * while the system can tune and receive on a given channel, it may not
103 * be able to associate or transmit any frames on that
104 * channel. There is no corresponding channel information for that
107 *********************************************************************/
110 const u8 iwl_eeprom_band_1[14] = {
111 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14
115 static const u8 iwl_eeprom_band_2[] = { /* 4915-5080MHz */
116 183, 184, 185, 187, 188, 189, 192, 196, 7, 8, 11, 12, 16
119 static const u8 iwl_eeprom_band_3[] = { /* 5170-5320MHz */
120 34, 36, 38, 40, 42, 44, 46, 48, 52, 56, 60, 64
123 static const u8 iwl_eeprom_band_4[] = { /* 5500-5700MHz */
124 100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140
127 static const u8 iwl_eeprom_band_5[] = { /* 5725-5825MHz */
128 145, 149, 153, 157, 161, 165
131 static const u8 iwl_eeprom_band_6[] = { /* 2.4 FAT channel */
135 static const u8 iwl_eeprom_band_7[] = { /* 5.2 FAT channel */
136 36, 44, 52, 60, 100, 108, 116, 124, 132, 149, 157
139 /******************************************************************************
141 * EEPROM related functions
143 ******************************************************************************/
145 int iwlcore_eeprom_verify_signature(struct iwl_priv *priv)
147 u32 gp = iwl_read32(priv, CSR_EEPROM_GP);
148 if ((gp & CSR_EEPROM_GP_VALID_MSK) == CSR_EEPROM_GP_BAD_SIGNATURE) {
149 IWL_ERROR("EEPROM not found, EEPROM_GP=0x%08x", gp);
154 EXPORT_SYMBOL(iwlcore_eeprom_verify_signature);
157 * The device's EEPROM semaphore prevents conflicts between driver and uCode
158 * when accessing the EEPROM; each access is a series of pulses to/from the
159 * EEPROM chip, not a single event, so even reads could conflict if they
160 * weren't arbitrated by the semaphore.
162 int iwlcore_eeprom_acquire_semaphore(struct iwl_priv *priv)
167 for (count = 0; count < EEPROM_SEM_RETRY_LIMIT; count++) {
168 /* Request semaphore */
169 iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
170 CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM);
172 /* See if we got it */
173 ret = iwl_poll_bit(priv, CSR_HW_IF_CONFIG_REG,
174 CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM,
175 CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM,
178 IWL_DEBUG_IO("Acquired semaphore after %d tries.\n",
186 EXPORT_SYMBOL(iwlcore_eeprom_acquire_semaphore);
188 void iwlcore_eeprom_release_semaphore(struct iwl_priv *priv)
190 iwl_clear_bit(priv, CSR_HW_IF_CONFIG_REG,
191 CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM);
194 EXPORT_SYMBOL(iwlcore_eeprom_release_semaphore);
196 const u8 *iwlcore_eeprom_query_addr(const struct iwl_priv *priv, size_t offset)
198 BUG_ON(offset >= priv->cfg->eeprom_size);
199 return &priv->eeprom[offset];
201 EXPORT_SYMBOL(iwlcore_eeprom_query_addr);
204 * iwl_eeprom_init - read EEPROM contents
206 * Load the EEPROM contents from adapter into priv->eeprom
208 * NOTE: This routine uses the non-debug IO access functions.
210 int iwl_eeprom_init(struct iwl_priv *priv)
213 u32 gp = iwl_read32(priv, CSR_EEPROM_GP);
215 int sz = priv->cfg->eeprom_size;
220 /* allocate eeprom */
221 priv->eeprom = kzalloc(sz, GFP_KERNEL);
226 e = (u16 *)priv->eeprom;
228 ret = priv->cfg->ops->lib->eeprom_ops.verify_signature(priv);
230 IWL_ERROR("EEPROM not found, EEPROM_GP=0x%08x", gp);
235 /* Make sure driver (instead of uCode) is allowed to read EEPROM */
236 ret = priv->cfg->ops->lib->eeprom_ops.acquire_semaphore(priv);
238 IWL_ERROR("Failed to acquire EEPROM semaphore.\n");
243 /* eeprom is an array of 16bit values */
244 for (addr = 0; addr < sz; addr += sizeof(u16)) {
245 _iwl_write32(priv, CSR_EEPROM_REG, addr << 1);
246 _iwl_clear_bit(priv, CSR_EEPROM_REG, CSR_EEPROM_REG_BIT_CMD);
248 for (i = 0; i < IWL_EEPROM_ACCESS_TIMEOUT;
249 i += IWL_EEPROM_ACCESS_DELAY) {
250 r = _iwl_read_direct32(priv, CSR_EEPROM_REG);
251 if (r & CSR_EEPROM_REG_READ_VALID_MSK)
253 udelay(IWL_EEPROM_ACCESS_DELAY);
256 if (!(r & CSR_EEPROM_REG_READ_VALID_MSK)) {
257 IWL_ERROR("Time out reading EEPROM[%d]", addr);
261 e[addr / 2] = le16_to_cpu((__force __le16)(r >> 16));
265 priv->cfg->ops->lib->eeprom_ops.release_semaphore(priv);
272 EXPORT_SYMBOL(iwl_eeprom_init);
274 void iwl_eeprom_free(struct iwl_priv *priv)
280 EXPORT_SYMBOL(iwl_eeprom_free);
282 int iwl_eeprom_check_version(struct iwl_priv *priv)
284 return priv->cfg->ops->lib->eeprom_ops.check_version(priv);
286 EXPORT_SYMBOL(iwl_eeprom_check_version);
288 const u8 *iwl_eeprom_query_addr(const struct iwl_priv *priv, size_t offset)
290 return priv->cfg->ops->lib->eeprom_ops.query_addr(priv, offset);
292 EXPORT_SYMBOL(iwl_eeprom_query_addr);
294 u16 iwl_eeprom_query16(const struct iwl_priv *priv, size_t offset)
296 return (u16)priv->eeprom[offset] | ((u16)priv->eeprom[offset + 1] << 8);
298 EXPORT_SYMBOL(iwl_eeprom_query16);
300 void iwl_eeprom_get_mac(const struct iwl_priv *priv, u8 *mac)
302 const u8 *addr = priv->cfg->ops->lib->eeprom_ops.query_addr(priv,
304 memcpy(mac, addr, ETH_ALEN);
306 EXPORT_SYMBOL(iwl_eeprom_get_mac);
308 static void iwl_init_band_reference(const struct iwl_priv *priv,
309 int eep_band, int *eeprom_ch_count,
310 const struct iwl_eeprom_channel **eeprom_ch_info,
311 const u8 **eeprom_ch_index)
313 u32 offset = priv->cfg->ops->lib->
314 eeprom_ops.regulatory_bands[eep_band - 1];
316 case 1: /* 2.4GHz band */
317 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_1);
318 *eeprom_ch_info = (struct iwl_eeprom_channel *)
319 iwl_eeprom_query_addr(priv, offset);
320 *eeprom_ch_index = iwl_eeprom_band_1;
322 case 2: /* 4.9GHz band */
323 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_2);
324 *eeprom_ch_info = (struct iwl_eeprom_channel *)
325 iwl_eeprom_query_addr(priv, offset);
326 *eeprom_ch_index = iwl_eeprom_band_2;
328 case 3: /* 5.2GHz band */
329 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_3);
330 *eeprom_ch_info = (struct iwl_eeprom_channel *)
331 iwl_eeprom_query_addr(priv, offset);
332 *eeprom_ch_index = iwl_eeprom_band_3;
334 case 4: /* 5.5GHz band */
335 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_4);
336 *eeprom_ch_info = (struct iwl_eeprom_channel *)
337 iwl_eeprom_query_addr(priv, offset);
338 *eeprom_ch_index = iwl_eeprom_band_4;
340 case 5: /* 5.7GHz band */
341 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_5);
342 *eeprom_ch_info = (struct iwl_eeprom_channel *)
343 iwl_eeprom_query_addr(priv, offset);
344 *eeprom_ch_index = iwl_eeprom_band_5;
346 case 6: /* 2.4GHz FAT channels */
347 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_6);
348 *eeprom_ch_info = (struct iwl_eeprom_channel *)
349 iwl_eeprom_query_addr(priv, offset);
350 *eeprom_ch_index = iwl_eeprom_band_6;
352 case 7: /* 5 GHz FAT channels */
353 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_7);
354 *eeprom_ch_info = (struct iwl_eeprom_channel *)
355 iwl_eeprom_query_addr(priv, offset);
356 *eeprom_ch_index = iwl_eeprom_band_7;
364 #define CHECK_AND_PRINT(x) ((eeprom_ch->flags & EEPROM_CHANNEL_##x) \
368 * iwl4965_set_fat_chan_info - Copy fat channel info into driver's priv.
370 * Does not set up a command, or touch hardware.
372 static int iwl4965_set_fat_chan_info(struct iwl_priv *priv,
373 enum ieee80211_band band, u16 channel,
374 const struct iwl_eeprom_channel *eeprom_ch,
375 u8 fat_extension_channel)
377 struct iwl_channel_info *ch_info;
379 ch_info = (struct iwl_channel_info *)
380 iwl_get_channel_info(priv, band, channel);
382 if (!is_channel_valid(ch_info))
385 IWL_DEBUG_INFO("FAT Ch. %d [%sGHz] %s%s%s%s%s(0x%02x"
386 " %ddBm): Ad-Hoc %ssupported\n",
388 is_channel_a_band(ch_info) ?
390 CHECK_AND_PRINT(IBSS),
391 CHECK_AND_PRINT(ACTIVE),
392 CHECK_AND_PRINT(RADAR),
393 CHECK_AND_PRINT(WIDE),
394 CHECK_AND_PRINT(DFS),
396 eeprom_ch->max_power_avg,
397 ((eeprom_ch->flags & EEPROM_CHANNEL_IBSS)
398 && !(eeprom_ch->flags & EEPROM_CHANNEL_RADAR)) ?
401 ch_info->fat_eeprom = *eeprom_ch;
402 ch_info->fat_max_power_avg = eeprom_ch->max_power_avg;
403 ch_info->fat_curr_txpow = eeprom_ch->max_power_avg;
404 ch_info->fat_min_power = 0;
405 ch_info->fat_scan_power = eeprom_ch->max_power_avg;
406 ch_info->fat_flags = eeprom_ch->flags;
407 ch_info->fat_extension_channel = fat_extension_channel;
412 #define CHECK_AND_PRINT_I(x) ((eeprom_ch_info[ch].flags & EEPROM_CHANNEL_##x) \
416 * iwl_init_channel_map - Set up driver's info for all possible channels
418 int iwl_init_channel_map(struct iwl_priv *priv)
420 int eeprom_ch_count = 0;
421 const u8 *eeprom_ch_index = NULL;
422 const struct iwl_eeprom_channel *eeprom_ch_info = NULL;
424 struct iwl_channel_info *ch_info;
426 if (priv->channel_count) {
427 IWL_DEBUG_INFO("Channel map already initialized.\n");
431 IWL_DEBUG_INFO("Initializing regulatory info from EEPROM\n");
433 priv->channel_count =
434 ARRAY_SIZE(iwl_eeprom_band_1) +
435 ARRAY_SIZE(iwl_eeprom_band_2) +
436 ARRAY_SIZE(iwl_eeprom_band_3) +
437 ARRAY_SIZE(iwl_eeprom_band_4) +
438 ARRAY_SIZE(iwl_eeprom_band_5);
440 IWL_DEBUG_INFO("Parsing data for %d channels.\n", priv->channel_count);
442 priv->channel_info = kzalloc(sizeof(struct iwl_channel_info) *
443 priv->channel_count, GFP_KERNEL);
444 if (!priv->channel_info) {
445 IWL_ERROR("Could not allocate channel_info\n");
446 priv->channel_count = 0;
450 ch_info = priv->channel_info;
452 /* Loop through the 5 EEPROM bands adding them in order to the
453 * channel map we maintain (that contains additional information than
454 * what just in the EEPROM) */
455 for (band = 1; band <= 5; band++) {
457 iwl_init_band_reference(priv, band, &eeprom_ch_count,
458 &eeprom_ch_info, &eeprom_ch_index);
460 /* Loop through each band adding each of the channels */
461 for (ch = 0; ch < eeprom_ch_count; ch++) {
462 ch_info->channel = eeprom_ch_index[ch];
463 ch_info->band = (band == 1) ? IEEE80211_BAND_2GHZ :
466 /* permanently store EEPROM's channel regulatory flags
467 * and max power in channel info database. */
468 ch_info->eeprom = eeprom_ch_info[ch];
470 /* Copy the run-time flags so they are there even on
471 * invalid channels */
472 ch_info->flags = eeprom_ch_info[ch].flags;
474 if (!(is_channel_valid(ch_info))) {
475 IWL_DEBUG_INFO("Ch. %d Flags %x [%sGHz] - "
479 is_channel_a_band(ch_info) ?
485 /* Initialize regulatory-based run-time data */
486 ch_info->max_power_avg = ch_info->curr_txpow =
487 eeprom_ch_info[ch].max_power_avg;
488 ch_info->scan_power = eeprom_ch_info[ch].max_power_avg;
489 ch_info->min_power = 0;
491 IWL_DEBUG_INFO("Ch. %d [%sGHz] %s%s%s%s%s%s(0x%02x"
492 " %ddBm): Ad-Hoc %ssupported\n",
494 is_channel_a_band(ch_info) ?
496 CHECK_AND_PRINT_I(VALID),
497 CHECK_AND_PRINT_I(IBSS),
498 CHECK_AND_PRINT_I(ACTIVE),
499 CHECK_AND_PRINT_I(RADAR),
500 CHECK_AND_PRINT_I(WIDE),
501 CHECK_AND_PRINT_I(DFS),
502 eeprom_ch_info[ch].flags,
503 eeprom_ch_info[ch].max_power_avg,
504 ((eeprom_ch_info[ch].
505 flags & EEPROM_CHANNEL_IBSS)
506 && !(eeprom_ch_info[ch].
507 flags & EEPROM_CHANNEL_RADAR))
510 /* Set the user_txpower_limit to the highest power
511 * supported by any channel */
512 if (eeprom_ch_info[ch].max_power_avg >
513 priv->user_txpower_limit)
514 priv->user_txpower_limit =
515 eeprom_ch_info[ch].max_power_avg;
521 /* Two additional EEPROM bands for 2.4 and 5 GHz FAT channels */
522 for (band = 6; band <= 7; band++) {
523 enum ieee80211_band ieeeband;
524 u8 fat_extension_chan;
526 iwl_init_band_reference(priv, band, &eeprom_ch_count,
527 &eeprom_ch_info, &eeprom_ch_index);
529 /* EEPROM band 6 is 2.4, band 7 is 5 GHz */
531 (band == 6) ? IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ;
533 /* Loop through each band adding each of the channels */
534 for (ch = 0; ch < eeprom_ch_count; ch++) {
537 ((eeprom_ch_index[ch] == 5) ||
538 (eeprom_ch_index[ch] == 6) ||
539 (eeprom_ch_index[ch] == 7)))
540 fat_extension_chan = HT_IE_EXT_CHANNEL_MAX;
542 fat_extension_chan = HT_IE_EXT_CHANNEL_ABOVE;
544 /* Set up driver's info for lower half */
545 iwl4965_set_fat_chan_info(priv, ieeeband,
547 &(eeprom_ch_info[ch]),
550 /* Set up driver's info for upper half */
551 iwl4965_set_fat_chan_info(priv, ieeeband,
552 (eeprom_ch_index[ch] + 4),
553 &(eeprom_ch_info[ch]),
554 HT_IE_EXT_CHANNEL_BELOW);
560 EXPORT_SYMBOL(iwl_init_channel_map);
563 * iwl_free_channel_map - undo allocations in iwl4965_init_channel_map
565 void iwl_free_channel_map(struct iwl_priv *priv)
567 kfree(priv->channel_info);
568 priv->channel_count = 0;
570 EXPORT_SYMBOL(iwl_free_channel_map);
573 * iwl_get_channel_info - Find driver's private channel info
575 * Based on band and channel number.
577 const struct iwl_channel_info *iwl_get_channel_info(
578 const struct iwl_priv *priv,
579 enum ieee80211_band band, u16 channel)
584 case IEEE80211_BAND_5GHZ:
585 for (i = 14; i < priv->channel_count; i++) {
586 if (priv->channel_info[i].channel == channel)
587 return &priv->channel_info[i];
590 case IEEE80211_BAND_2GHZ:
591 if (channel >= 1 && channel <= 14)
592 return &priv->channel_info[channel - 1];
600 EXPORT_SYMBOL(iwl_get_channel_info);