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/init.h>
68 #include <net/mac80211.h>
70 #include "iwl-commands.h"
73 #include "iwl-debug.h"
74 #include "iwl-eeprom.h"
77 /************************** EEPROM BANDS ****************************
79 * The iwl_eeprom_band definitions below provide the mapping from the
80 * EEPROM contents to the specific channel number supported for each
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.
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
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
96 * A value of 0xff stored in the channel_map indicates that the channel
97 * is not supported by the hardware at all.
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
106 *********************************************************************/
109 const u8 iwl_eeprom_band_1
[14] = {
110 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14
114 static const u8 iwl_eeprom_band_2
[] = { /* 4915-5080MHz */
115 183, 184, 185, 187, 188, 189, 192, 196, 7, 8, 11, 12, 16
118 static const u8 iwl_eeprom_band_3
[] = { /* 5170-5320MHz */
119 34, 36, 38, 40, 42, 44, 46, 48, 52, 56, 60, 64
122 static const u8 iwl_eeprom_band_4
[] = { /* 5500-5700MHz */
123 100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140
126 static const u8 iwl_eeprom_band_5
[] = { /* 5725-5825MHz */
127 145, 149, 153, 157, 161, 165
130 static const u8 iwl_eeprom_band_6
[] = { /* 2.4 FAT channel */
134 static const u8 iwl_eeprom_band_7
[] = { /* 5.2 FAT channel */
135 36, 44, 52, 60, 100, 108, 116, 124, 132, 149, 157
138 /******************************************************************************
140 * EEPROM related functions
142 ******************************************************************************/
144 int iwlcore_eeprom_verify_signature(struct iwl_priv
*priv
)
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
);
153 EXPORT_SYMBOL(iwlcore_eeprom_verify_signature
);
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.
161 int iwlcore_eeprom_acquire_semaphore(struct iwl_priv
*priv
)
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
);
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
,
177 IWL_DEBUG_IO("Acquired semaphore after %d tries.\n",
185 EXPORT_SYMBOL(iwlcore_eeprom_acquire_semaphore
);
187 void iwlcore_eeprom_release_semaphore(struct iwl_priv
*priv
)
189 iwl_clear_bit(priv
, CSR_HW_IF_CONFIG_REG
,
190 CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM
);
193 EXPORT_SYMBOL(iwlcore_eeprom_release_semaphore
);
195 const u8
*iwlcore_eeprom_query_addr(const struct iwl_priv
*priv
, size_t offset
)
197 BUG_ON(offset
>= priv
->cfg
->eeprom_size
);
198 return &priv
->eeprom
[offset
];
200 EXPORT_SYMBOL(iwlcore_eeprom_query_addr
);
203 * iwl_eeprom_init - read EEPROM contents
205 * Load the EEPROM contents from adapter into priv->eeprom
207 * NOTE: This routine uses the non-debug IO access functions.
209 int iwl_eeprom_init(struct iwl_priv
*priv
)
212 u32 gp
= iwl_read32(priv
, CSR_EEPROM_GP
);
214 int sz
= priv
->cfg
->eeprom_size
;
219 /* allocate eeprom */
220 priv
->eeprom
= kzalloc(sz
, GFP_KERNEL
);
225 e
= (u16
*)priv
->eeprom
;
227 ret
= priv
->cfg
->ops
->lib
->eeprom_ops
.verify_signature(priv
);
229 IWL_ERROR("EEPROM not found, EEPROM_GP=0x%08x\n", gp
);
234 /* Make sure driver (instead of uCode) is allowed to read EEPROM */
235 ret
= priv
->cfg
->ops
->lib
->eeprom_ops
.acquire_semaphore(priv
);
237 IWL_ERROR("Failed to acquire EEPROM semaphore.\n");
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
);
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
)
252 udelay(IWL_EEPROM_ACCESS_DELAY
);
255 if (!(r
& CSR_EEPROM_REG_READ_VALID_MSK
)) {
256 IWL_ERROR("Time out reading EEPROM[%d]\n", addr
);
260 e
[addr
/ 2] = le16_to_cpu((__force __le16
)(r
>> 16));
264 priv
->cfg
->ops
->lib
->eeprom_ops
.release_semaphore(priv
);
271 EXPORT_SYMBOL(iwl_eeprom_init
);
273 void iwl_eeprom_free(struct iwl_priv
*priv
)
278 EXPORT_SYMBOL(iwl_eeprom_free
);
280 int iwl_eeprom_check_version(struct iwl_priv
*priv
)
282 return priv
->cfg
->ops
->lib
->eeprom_ops
.check_version(priv
);
284 EXPORT_SYMBOL(iwl_eeprom_check_version
);
286 const u8
*iwl_eeprom_query_addr(const struct iwl_priv
*priv
, size_t offset
)
288 return priv
->cfg
->ops
->lib
->eeprom_ops
.query_addr(priv
, offset
);
290 EXPORT_SYMBOL(iwl_eeprom_query_addr
);
292 u16
iwl_eeprom_query16(const struct iwl_priv
*priv
, size_t offset
)
294 return (u16
)priv
->eeprom
[offset
] | ((u16
)priv
->eeprom
[offset
+ 1] << 8);
296 EXPORT_SYMBOL(iwl_eeprom_query16
);
298 void iwl_eeprom_get_mac(const struct iwl_priv
*priv
, u8
*mac
)
300 const u8
*addr
= priv
->cfg
->ops
->lib
->eeprom_ops
.query_addr(priv
,
302 memcpy(mac
, addr
, ETH_ALEN
);
304 EXPORT_SYMBOL(iwl_eeprom_get_mac
);
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
)
311 u32 offset
= priv
->cfg
->ops
->lib
->
312 eeprom_ops
.regulatory_bands
[eep_band
- 1];
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
;
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
;
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
;
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
;
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
;
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
;
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
;
362 #define CHECK_AND_PRINT(x) ((eeprom_ch->flags & EEPROM_CHANNEL_##x) \
366 * iwl_set_fat_chan_info - Copy fat channel info into driver's priv.
368 * Does not set up a command, or touch hardware.
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
)
375 struct iwl_channel_info
*ch_info
;
377 ch_info
= (struct iwl_channel_info
*)
378 iwl_get_channel_info(priv
, band
, channel
);
380 if (!is_channel_valid(ch_info
))
383 IWL_DEBUG_INFO("FAT Ch. %d [%sGHz] %s%s%s%s%s(0x%02x %ddBm):"
384 " Ad-Hoc %ssupported\n",
386 is_channel_a_band(ch_info
) ?
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
),
394 eeprom_ch
->max_power_avg
,
395 ((eeprom_ch
->flags
& EEPROM_CHANNEL_IBSS
)
396 && !(eeprom_ch
->flags
& EEPROM_CHANNEL_RADAR
)) ?
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
;
410 #define CHECK_AND_PRINT_I(x) ((eeprom_ch_info[ch].flags & EEPROM_CHANNEL_##x) \
414 * iwl_init_channel_map - Set up driver's info for all possible channels
416 int iwl_init_channel_map(struct iwl_priv
*priv
)
418 int eeprom_ch_count
= 0;
419 const u8
*eeprom_ch_index
= NULL
;
420 const struct iwl_eeprom_channel
*eeprom_ch_info
= NULL
;
422 struct iwl_channel_info
*ch_info
;
424 if (priv
->channel_count
) {
425 IWL_DEBUG_INFO("Channel map already initialized.\n");
429 IWL_DEBUG_INFO("Initializing regulatory info from EEPROM\n");
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
);
438 IWL_DEBUG_INFO("Parsing data for %d channels.\n", priv
->channel_count
);
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;
448 ch_info
= priv
->channel_info
;
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
++) {
455 iwl_init_band_reference(priv
, band
, &eeprom_ch_count
,
456 &eeprom_ch_info
, &eeprom_ch_index
);
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
:
464 /* permanently store EEPROM's channel regulatory flags
465 * and max power in channel info database. */
466 ch_info
->eeprom
= eeprom_ch_info
[ch
];
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
473 ch_info
->fat_extension_channel
=
474 (IEEE80211_CHAN_NO_FAT_ABOVE
|
475 IEEE80211_CHAN_NO_FAT_BELOW
);
477 if (!(is_channel_valid(ch_info
))) {
478 IWL_DEBUG_INFO("Ch. %d Flags %x [%sGHz] - "
482 is_channel_a_band(ch_info
) ?
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;
494 IWL_DEBUG_INFO("Ch. %d [%sGHz] %s%s%s%s%s%s(0x%02x %ddBm):"
495 " Ad-Hoc %ssupported\n",
497 is_channel_a_band(ch_info
) ?
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
))
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
;
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
;
529 iwl_init_band_reference(priv
, band
, &eeprom_ch_count
,
530 &eeprom_ch_info
, &eeprom_ch_index
);
532 /* EEPROM band 6 is 2.4, band 7 is 5 GHz */
534 (band
== 6) ? IEEE80211_BAND_2GHZ
: IEEE80211_BAND_5GHZ
;
536 /* Loop through each band adding each of the channels */
537 for (ch
= 0; ch
< eeprom_ch_count
; ch
++) {
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;
547 IEEE80211_CHAN_NO_FAT_BELOW
;
549 /* Set up driver's info for lower half */
550 iwl_set_fat_chan_info(priv
, ieeeband
,
552 &(eeprom_ch_info
[ch
]),
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
);
565 EXPORT_SYMBOL(iwl_init_channel_map
);
568 * iwl_free_channel_map - undo allocations in iwl_init_channel_map
570 void iwl_free_channel_map(struct iwl_priv
*priv
)
572 kfree(priv
->channel_info
);
573 priv
->channel_count
= 0;
577 * iwl_get_channel_info - Find driver's private channel info
579 * Based on band and channel number.
581 const struct iwl_channel_info
*iwl_get_channel_info(const struct iwl_priv
*priv
,
582 enum ieee80211_band band
, u16 channel
)
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
];
593 case IEEE80211_BAND_2GHZ
:
594 if (channel
>= 1 && channel
<= 14)
595 return &priv
->channel_info
[channel
- 1];
603 EXPORT_SYMBOL(iwl_get_channel_info
);