ia64/kvm: compilation fix. export account_system_vtime.
[pv_ops_mirror.git] / drivers / net / wireless / iwlwifi / iwl-eeprom.c
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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.
6 * GPL LICENSE SUMMARY
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,
22 * USA
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
31 * BSD LICENSE
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
38 * are met:
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.
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"
72 #include "iwl-4965.h"
73 #include "iwl-core.h"
74 #include "iwl-debug.h"
75 #include "iwl-eeprom.h"
76 #include "iwl-io.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
82 * band.
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
95 * band_2
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
105 * entry.
107 *********************************************************************/
109 /* 2.4 GHz */
110 const u8 iwl_eeprom_band_1[14] = {
111 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14
114 /* 5.2 GHz bands */
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 */
132 1, 2, 3, 4, 5, 6, 7
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);
150 return -ENOENT;
152 return 0;
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)
164 u16 count;
165 int ret;
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,
176 EEPROM_SEM_TIMEOUT);
177 if (ret >= 0) {
178 IWL_DEBUG_IO("Acquired semaphore after %d tries.\n",
179 count+1);
180 return ret;
184 return ret;
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);
198 * iwl_eeprom_init - read EEPROM contents
200 * Load the EEPROM contents from adapter into priv->eeprom
202 * NOTE: This routine uses the non-debug IO access functions.
204 int iwl_eeprom_init(struct iwl_priv *priv)
206 u16 *e = (u16 *)&priv->eeprom;
207 u32 gp = iwl_read32(priv, CSR_EEPROM_GP);
208 u32 r;
209 int sz = sizeof(priv->eeprom);
210 int ret;
211 int i;
212 u16 addr;
214 /* The EEPROM structure has several padding buffers within it
215 * and when adding new EEPROM maps is subject to programmer errors
216 * which may be very difficult to identify without explicitly
217 * checking the resulting size of the eeprom map. */
218 BUILD_BUG_ON(sizeof(priv->eeprom) != IWL_EEPROM_IMAGE_SIZE);
220 if ((gp & CSR_EEPROM_GP_VALID_MSK) == CSR_EEPROM_GP_BAD_SIGNATURE) {
221 IWL_ERROR("EEPROM not found, EEPROM_GP=0x%08x", gp);
222 return -ENOENT;
225 /* Make sure driver (instead of uCode) is allowed to read EEPROM */
226 ret = priv->cfg->ops->lib->eeprom_ops.acquire_semaphore(priv);
227 if (ret < 0) {
228 IWL_ERROR("Failed to acquire EEPROM semaphore.\n");
229 return -ENOENT;
232 /* eeprom is an array of 16bit values */
233 for (addr = 0; addr < sz; addr += sizeof(u16)) {
234 _iwl_write32(priv, CSR_EEPROM_REG, addr << 1);
235 _iwl_clear_bit(priv, CSR_EEPROM_REG, CSR_EEPROM_REG_BIT_CMD);
237 for (i = 0; i < IWL_EEPROM_ACCESS_TIMEOUT;
238 i += IWL_EEPROM_ACCESS_DELAY) {
239 r = _iwl_read_direct32(priv, CSR_EEPROM_REG);
240 if (r & CSR_EEPROM_REG_READ_VALID_MSK)
241 break;
242 udelay(IWL_EEPROM_ACCESS_DELAY);
245 if (!(r & CSR_EEPROM_REG_READ_VALID_MSK)) {
246 IWL_ERROR("Time out reading EEPROM[%d]", addr);
247 ret = -ETIMEDOUT;
248 goto done;
250 e[addr / 2] = le16_to_cpu((__force __le16)(r >> 16));
252 ret = 0;
254 done:
255 priv->cfg->ops->lib->eeprom_ops.release_semaphore(priv);
256 return ret;
258 EXPORT_SYMBOL(iwl_eeprom_init);
261 void iwl_eeprom_get_mac(const struct iwl_priv *priv, u8 *mac)
263 memcpy(mac, priv->eeprom.mac_address, 6);
265 EXPORT_SYMBOL(iwl_eeprom_get_mac);
267 static void iwl_init_band_reference(const struct iwl_priv *priv,
268 int band,
269 int *eeprom_ch_count,
270 const struct iwl4965_eeprom_channel
271 **eeprom_ch_info,
272 const u8 **eeprom_ch_index)
274 switch (band) {
275 case 1: /* 2.4GHz band */
276 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_1);
277 *eeprom_ch_info = priv->eeprom.band_1_channels;
278 *eeprom_ch_index = iwl_eeprom_band_1;
279 break;
280 case 2: /* 4.9GHz band */
281 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_2);
282 *eeprom_ch_info = priv->eeprom.band_2_channels;
283 *eeprom_ch_index = iwl_eeprom_band_2;
284 break;
285 case 3: /* 5.2GHz band */
286 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_3);
287 *eeprom_ch_info = priv->eeprom.band_3_channels;
288 *eeprom_ch_index = iwl_eeprom_band_3;
289 break;
290 case 4: /* 5.5GHz band */
291 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_4);
292 *eeprom_ch_info = priv->eeprom.band_4_channels;
293 *eeprom_ch_index = iwl_eeprom_band_4;
294 break;
295 case 5: /* 5.7GHz band */
296 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_5);
297 *eeprom_ch_info = priv->eeprom.band_5_channels;
298 *eeprom_ch_index = iwl_eeprom_band_5;
299 break;
300 case 6: /* 2.4GHz FAT channels */
301 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_6);
302 *eeprom_ch_info = priv->eeprom.band_24_channels;
303 *eeprom_ch_index = iwl_eeprom_band_6;
304 break;
305 case 7: /* 5 GHz FAT channels */
306 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_7);
307 *eeprom_ch_info = priv->eeprom.band_52_channels;
308 *eeprom_ch_index = iwl_eeprom_band_7;
309 break;
310 default:
311 BUG();
312 return;
316 #define CHECK_AND_PRINT(x) ((eeprom_ch->flags & EEPROM_CHANNEL_##x) \
317 ? # x " " : "")
320 * iwl4965_set_fat_chan_info - Copy fat channel info into driver's priv.
322 * Does not set up a command, or touch hardware.
324 static int iwl4965_set_fat_chan_info(struct iwl_priv *priv,
325 enum ieee80211_band band, u16 channel,
326 const struct iwl4965_eeprom_channel *eeprom_ch,
327 u8 fat_extension_channel)
329 struct iwl_channel_info *ch_info;
331 ch_info = (struct iwl_channel_info *)
332 iwl_get_channel_info(priv, band, channel);
334 if (!is_channel_valid(ch_info))
335 return -1;
337 IWL_DEBUG_INFO("FAT Ch. %d [%sGHz] %s%s%s%s%s%s(0x%02x"
338 " %ddBm): Ad-Hoc %ssupported\n",
339 ch_info->channel,
340 is_channel_a_band(ch_info) ?
341 "5.2" : "2.4",
342 CHECK_AND_PRINT(IBSS),
343 CHECK_AND_PRINT(ACTIVE),
344 CHECK_AND_PRINT(RADAR),
345 CHECK_AND_PRINT(WIDE),
346 CHECK_AND_PRINT(NARROW),
347 CHECK_AND_PRINT(DFS),
348 eeprom_ch->flags,
349 eeprom_ch->max_power_avg,
350 ((eeprom_ch->flags & EEPROM_CHANNEL_IBSS)
351 && !(eeprom_ch->flags & EEPROM_CHANNEL_RADAR)) ?
352 "" : "not ");
354 ch_info->fat_eeprom = *eeprom_ch;
355 ch_info->fat_max_power_avg = eeprom_ch->max_power_avg;
356 ch_info->fat_curr_txpow = eeprom_ch->max_power_avg;
357 ch_info->fat_min_power = 0;
358 ch_info->fat_scan_power = eeprom_ch->max_power_avg;
359 ch_info->fat_flags = eeprom_ch->flags;
360 ch_info->fat_extension_channel = fat_extension_channel;
362 return 0;
365 #define CHECK_AND_PRINT_I(x) ((eeprom_ch_info[ch].flags & EEPROM_CHANNEL_##x) \
366 ? # x " " : "")
369 * iwl_init_channel_map - Set up driver's info for all possible channels
371 int iwl_init_channel_map(struct iwl_priv *priv)
373 int eeprom_ch_count = 0;
374 const u8 *eeprom_ch_index = NULL;
375 const struct iwl4965_eeprom_channel *eeprom_ch_info = NULL;
376 int band, ch;
377 struct iwl_channel_info *ch_info;
379 if (priv->channel_count) {
380 IWL_DEBUG_INFO("Channel map already initialized.\n");
381 return 0;
384 if (priv->eeprom.version < 0x2f) {
385 IWL_WARNING("Unsupported EEPROM version: 0x%04X\n",
386 priv->eeprom.version);
387 return -EINVAL;
390 IWL_DEBUG_INFO("Initializing regulatory info from EEPROM\n");
392 priv->channel_count =
393 ARRAY_SIZE(iwl_eeprom_band_1) +
394 ARRAY_SIZE(iwl_eeprom_band_2) +
395 ARRAY_SIZE(iwl_eeprom_band_3) +
396 ARRAY_SIZE(iwl_eeprom_band_4) +
397 ARRAY_SIZE(iwl_eeprom_band_5);
399 IWL_DEBUG_INFO("Parsing data for %d channels.\n", priv->channel_count);
401 priv->channel_info = kzalloc(sizeof(struct iwl_channel_info) *
402 priv->channel_count, GFP_KERNEL);
403 if (!priv->channel_info) {
404 IWL_ERROR("Could not allocate channel_info\n");
405 priv->channel_count = 0;
406 return -ENOMEM;
409 ch_info = priv->channel_info;
411 /* Loop through the 5 EEPROM bands adding them in order to the
412 * channel map we maintain (that contains additional information than
413 * what just in the EEPROM) */
414 for (band = 1; band <= 5; band++) {
416 iwl_init_band_reference(priv, band, &eeprom_ch_count,
417 &eeprom_ch_info, &eeprom_ch_index);
419 /* Loop through each band adding each of the channels */
420 for (ch = 0; ch < eeprom_ch_count; ch++) {
421 ch_info->channel = eeprom_ch_index[ch];
422 ch_info->band = (band == 1) ? IEEE80211_BAND_2GHZ :
423 IEEE80211_BAND_5GHZ;
425 /* permanently store EEPROM's channel regulatory flags
426 * and max power in channel info database. */
427 ch_info->eeprom = eeprom_ch_info[ch];
429 /* Copy the run-time flags so they are there even on
430 * invalid channels */
431 ch_info->flags = eeprom_ch_info[ch].flags;
433 if (!(is_channel_valid(ch_info))) {
434 IWL_DEBUG_INFO("Ch. %d Flags %x [%sGHz] - "
435 "No traffic\n",
436 ch_info->channel,
437 ch_info->flags,
438 is_channel_a_band(ch_info) ?
439 "5.2" : "2.4");
440 ch_info++;
441 continue;
444 /* Initialize regulatory-based run-time data */
445 ch_info->max_power_avg = ch_info->curr_txpow =
446 eeprom_ch_info[ch].max_power_avg;
447 ch_info->scan_power = eeprom_ch_info[ch].max_power_avg;
448 ch_info->min_power = 0;
450 IWL_DEBUG_INFO("Ch. %d [%sGHz] %s%s%s%s%s%s%s(0x%02x"
451 " %ddBm): Ad-Hoc %ssupported\n",
452 ch_info->channel,
453 is_channel_a_band(ch_info) ?
454 "5.2" : "2.4",
455 CHECK_AND_PRINT_I(VALID),
456 CHECK_AND_PRINT_I(IBSS),
457 CHECK_AND_PRINT_I(ACTIVE),
458 CHECK_AND_PRINT_I(RADAR),
459 CHECK_AND_PRINT_I(WIDE),
460 CHECK_AND_PRINT_I(NARROW),
461 CHECK_AND_PRINT_I(DFS),
462 eeprom_ch_info[ch].flags,
463 eeprom_ch_info[ch].max_power_avg,
464 ((eeprom_ch_info[ch].
465 flags & EEPROM_CHANNEL_IBSS)
466 && !(eeprom_ch_info[ch].
467 flags & EEPROM_CHANNEL_RADAR))
468 ? "" : "not ");
470 /* Set the user_txpower_limit to the highest power
471 * supported by any channel */
472 if (eeprom_ch_info[ch].max_power_avg >
473 priv->user_txpower_limit)
474 priv->user_txpower_limit =
475 eeprom_ch_info[ch].max_power_avg;
477 ch_info++;
481 /* Two additional EEPROM bands for 2.4 and 5 GHz FAT channels */
482 for (band = 6; band <= 7; band++) {
483 enum ieee80211_band ieeeband;
484 u8 fat_extension_chan;
486 iwl_init_band_reference(priv, band, &eeprom_ch_count,
487 &eeprom_ch_info, &eeprom_ch_index);
489 /* EEPROM band 6 is 2.4, band 7 is 5 GHz */
490 ieeeband =
491 (band == 6) ? IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ;
493 /* Loop through each band adding each of the channels */
494 for (ch = 0; ch < eeprom_ch_count; ch++) {
496 if ((band == 6) &&
497 ((eeprom_ch_index[ch] == 5) ||
498 (eeprom_ch_index[ch] == 6) ||
499 (eeprom_ch_index[ch] == 7)))
500 fat_extension_chan = HT_IE_EXT_CHANNEL_MAX;
501 else
502 fat_extension_chan = HT_IE_EXT_CHANNEL_ABOVE;
504 /* Set up driver's info for lower half */
505 iwl4965_set_fat_chan_info(priv, ieeeband,
506 eeprom_ch_index[ch],
507 &(eeprom_ch_info[ch]),
508 fat_extension_chan);
510 /* Set up driver's info for upper half */
511 iwl4965_set_fat_chan_info(priv, ieeeband,
512 (eeprom_ch_index[ch] + 4),
513 &(eeprom_ch_info[ch]),
514 HT_IE_EXT_CHANNEL_BELOW);
518 return 0;
520 EXPORT_SYMBOL(iwl_init_channel_map);
523 * iwl_free_channel_map - undo allocations in iwl4965_init_channel_map
525 void iwl_free_channel_map(struct iwl_priv *priv)
527 kfree(priv->channel_info);
528 priv->channel_count = 0;
530 EXPORT_SYMBOL(iwl_free_channel_map);
533 * iwl_get_channel_info - Find driver's private channel info
535 * Based on band and channel number.
537 const struct iwl_channel_info *iwl_get_channel_info(
538 const struct iwl_priv *priv,
539 enum ieee80211_band band, u16 channel)
541 int i;
543 switch (band) {
544 case IEEE80211_BAND_5GHZ:
545 for (i = 14; i < priv->channel_count; i++) {
546 if (priv->channel_info[i].channel == channel)
547 return &priv->channel_info[i];
549 break;
550 case IEEE80211_BAND_2GHZ:
551 if (channel >= 1 && channel <= 14)
552 return &priv->channel_info[channel - 1];
553 break;
554 default:
555 BUG();
558 return NULL;
560 EXPORT_SYMBOL(iwl_get_channel_info);