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-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\n", 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\n", 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]\n", 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
)
279 EXPORT_SYMBOL(iwl_eeprom_free
);
281 int iwl_eeprom_check_version(struct iwl_priv
*priv
)
283 return priv
->cfg
->ops
->lib
->eeprom_ops
.check_version(priv
);
285 EXPORT_SYMBOL(iwl_eeprom_check_version
);
287 const u8
*iwl_eeprom_query_addr(const struct iwl_priv
*priv
, size_t offset
)
289 return priv
->cfg
->ops
->lib
->eeprom_ops
.query_addr(priv
, offset
);
291 EXPORT_SYMBOL(iwl_eeprom_query_addr
);
293 u16
iwl_eeprom_query16(const struct iwl_priv
*priv
, size_t offset
)
295 return (u16
)priv
->eeprom
[offset
] | ((u16
)priv
->eeprom
[offset
+ 1] << 8);
297 EXPORT_SYMBOL(iwl_eeprom_query16
);
299 void iwl_eeprom_get_mac(const struct iwl_priv
*priv
, u8
*mac
)
301 const u8
*addr
= priv
->cfg
->ops
->lib
->eeprom_ops
.query_addr(priv
,
303 memcpy(mac
, addr
, ETH_ALEN
);
305 EXPORT_SYMBOL(iwl_eeprom_get_mac
);
307 static void iwl_init_band_reference(const struct iwl_priv
*priv
,
308 int eep_band
, int *eeprom_ch_count
,
309 const struct iwl_eeprom_channel
**eeprom_ch_info
,
310 const u8
**eeprom_ch_index
)
312 u32 offset
= priv
->cfg
->ops
->lib
->
313 eeprom_ops
.regulatory_bands
[eep_band
- 1];
315 case 1: /* 2.4GHz band */
316 *eeprom_ch_count
= ARRAY_SIZE(iwl_eeprom_band_1
);
317 *eeprom_ch_info
= (struct iwl_eeprom_channel
*)
318 iwl_eeprom_query_addr(priv
, offset
);
319 *eeprom_ch_index
= iwl_eeprom_band_1
;
321 case 2: /* 4.9GHz band */
322 *eeprom_ch_count
= ARRAY_SIZE(iwl_eeprom_band_2
);
323 *eeprom_ch_info
= (struct iwl_eeprom_channel
*)
324 iwl_eeprom_query_addr(priv
, offset
);
325 *eeprom_ch_index
= iwl_eeprom_band_2
;
327 case 3: /* 5.2GHz band */
328 *eeprom_ch_count
= ARRAY_SIZE(iwl_eeprom_band_3
);
329 *eeprom_ch_info
= (struct iwl_eeprom_channel
*)
330 iwl_eeprom_query_addr(priv
, offset
);
331 *eeprom_ch_index
= iwl_eeprom_band_3
;
333 case 4: /* 5.5GHz band */
334 *eeprom_ch_count
= ARRAY_SIZE(iwl_eeprom_band_4
);
335 *eeprom_ch_info
= (struct iwl_eeprom_channel
*)
336 iwl_eeprom_query_addr(priv
, offset
);
337 *eeprom_ch_index
= iwl_eeprom_band_4
;
339 case 5: /* 5.7GHz band */
340 *eeprom_ch_count
= ARRAY_SIZE(iwl_eeprom_band_5
);
341 *eeprom_ch_info
= (struct iwl_eeprom_channel
*)
342 iwl_eeprom_query_addr(priv
, offset
);
343 *eeprom_ch_index
= iwl_eeprom_band_5
;
345 case 6: /* 2.4GHz FAT channels */
346 *eeprom_ch_count
= ARRAY_SIZE(iwl_eeprom_band_6
);
347 *eeprom_ch_info
= (struct iwl_eeprom_channel
*)
348 iwl_eeprom_query_addr(priv
, offset
);
349 *eeprom_ch_index
= iwl_eeprom_band_6
;
351 case 7: /* 5 GHz FAT channels */
352 *eeprom_ch_count
= ARRAY_SIZE(iwl_eeprom_band_7
);
353 *eeprom_ch_info
= (struct iwl_eeprom_channel
*)
354 iwl_eeprom_query_addr(priv
, offset
);
355 *eeprom_ch_index
= iwl_eeprom_band_7
;
363 #define CHECK_AND_PRINT(x) ((eeprom_ch->flags & EEPROM_CHANNEL_##x) \
367 * iwl_set_fat_chan_info - Copy fat channel info into driver's priv.
369 * Does not set up a command, or touch hardware.
371 static int iwl_set_fat_chan_info(struct iwl_priv
*priv
,
372 enum ieee80211_band band
, u16 channel
,
373 const struct iwl_eeprom_channel
*eeprom_ch
,
374 u8 fat_extension_channel
)
376 struct iwl_channel_info
*ch_info
;
378 ch_info
= (struct iwl_channel_info
*)
379 iwl_get_channel_info(priv
, band
, channel
);
381 if (!is_channel_valid(ch_info
))
384 IWL_DEBUG_INFO("FAT Ch. %d [%sGHz] %s%s%s%s%s(0x%02x %ddBm):"
385 " Ad-Hoc %ssupported\n",
387 is_channel_a_band(ch_info
) ?
389 CHECK_AND_PRINT(IBSS
),
390 CHECK_AND_PRINT(ACTIVE
),
391 CHECK_AND_PRINT(RADAR
),
392 CHECK_AND_PRINT(WIDE
),
393 CHECK_AND_PRINT(DFS
),
395 eeprom_ch
->max_power_avg
,
396 ((eeprom_ch
->flags
& EEPROM_CHANNEL_IBSS
)
397 && !(eeprom_ch
->flags
& EEPROM_CHANNEL_RADAR
)) ?
400 ch_info
->fat_eeprom
= *eeprom_ch
;
401 ch_info
->fat_max_power_avg
= eeprom_ch
->max_power_avg
;
402 ch_info
->fat_curr_txpow
= eeprom_ch
->max_power_avg
;
403 ch_info
->fat_min_power
= 0;
404 ch_info
->fat_scan_power
= eeprom_ch
->max_power_avg
;
405 ch_info
->fat_flags
= eeprom_ch
->flags
;
406 ch_info
->fat_extension_channel
= fat_extension_channel
;
411 #define CHECK_AND_PRINT_I(x) ((eeprom_ch_info[ch].flags & EEPROM_CHANNEL_##x) \
415 * iwl_init_channel_map - Set up driver's info for all possible channels
417 int iwl_init_channel_map(struct iwl_priv
*priv
)
419 int eeprom_ch_count
= 0;
420 const u8
*eeprom_ch_index
= NULL
;
421 const struct iwl_eeprom_channel
*eeprom_ch_info
= NULL
;
423 struct iwl_channel_info
*ch_info
;
425 if (priv
->channel_count
) {
426 IWL_DEBUG_INFO("Channel map already initialized.\n");
430 IWL_DEBUG_INFO("Initializing regulatory info from EEPROM\n");
432 priv
->channel_count
=
433 ARRAY_SIZE(iwl_eeprom_band_1
) +
434 ARRAY_SIZE(iwl_eeprom_band_2
) +
435 ARRAY_SIZE(iwl_eeprom_band_3
) +
436 ARRAY_SIZE(iwl_eeprom_band_4
) +
437 ARRAY_SIZE(iwl_eeprom_band_5
);
439 IWL_DEBUG_INFO("Parsing data for %d channels.\n", priv
->channel_count
);
441 priv
->channel_info
= kzalloc(sizeof(struct iwl_channel_info
) *
442 priv
->channel_count
, GFP_KERNEL
);
443 if (!priv
->channel_info
) {
444 IWL_ERROR("Could not allocate channel_info\n");
445 priv
->channel_count
= 0;
449 ch_info
= priv
->channel_info
;
451 /* Loop through the 5 EEPROM bands adding them in order to the
452 * channel map we maintain (that contains additional information than
453 * what just in the EEPROM) */
454 for (band
= 1; band
<= 5; band
++) {
456 iwl_init_band_reference(priv
, band
, &eeprom_ch_count
,
457 &eeprom_ch_info
, &eeprom_ch_index
);
459 /* Loop through each band adding each of the channels */
460 for (ch
= 0; ch
< eeprom_ch_count
; ch
++) {
461 ch_info
->channel
= eeprom_ch_index
[ch
];
462 ch_info
->band
= (band
== 1) ? IEEE80211_BAND_2GHZ
:
465 /* permanently store EEPROM's channel regulatory flags
466 * and max power in channel info database. */
467 ch_info
->eeprom
= eeprom_ch_info
[ch
];
469 /* Copy the run-time flags so they are there even on
470 * invalid channels */
471 ch_info
->flags
= eeprom_ch_info
[ch
].flags
;
472 /* First write that fat is not enabled, and then enable
474 ch_info
->fat_extension_channel
=
475 (IEEE80211_CHAN_NO_FAT_ABOVE
|
476 IEEE80211_CHAN_NO_FAT_BELOW
);
478 if (!(is_channel_valid(ch_info
))) {
479 IWL_DEBUG_INFO("Ch. %d Flags %x [%sGHz] - "
483 is_channel_a_band(ch_info
) ?
489 /* Initialize regulatory-based run-time data */
490 ch_info
->max_power_avg
= ch_info
->curr_txpow
=
491 eeprom_ch_info
[ch
].max_power_avg
;
492 ch_info
->scan_power
= eeprom_ch_info
[ch
].max_power_avg
;
493 ch_info
->min_power
= 0;
495 IWL_DEBUG_INFO("Ch. %d [%sGHz] %s%s%s%s%s%s(0x%02x %ddBm):"
496 " Ad-Hoc %ssupported\n",
498 is_channel_a_band(ch_info
) ?
500 CHECK_AND_PRINT_I(VALID
),
501 CHECK_AND_PRINT_I(IBSS
),
502 CHECK_AND_PRINT_I(ACTIVE
),
503 CHECK_AND_PRINT_I(RADAR
),
504 CHECK_AND_PRINT_I(WIDE
),
505 CHECK_AND_PRINT_I(DFS
),
506 eeprom_ch_info
[ch
].flags
,
507 eeprom_ch_info
[ch
].max_power_avg
,
508 ((eeprom_ch_info
[ch
].
509 flags
& EEPROM_CHANNEL_IBSS
)
510 && !(eeprom_ch_info
[ch
].
511 flags
& EEPROM_CHANNEL_RADAR
))
514 /* Set the user_txpower_limit to the highest power
515 * supported by any channel */
516 if (eeprom_ch_info
[ch
].max_power_avg
>
517 priv
->tx_power_user_lmt
)
518 priv
->tx_power_user_lmt
=
519 eeprom_ch_info
[ch
].max_power_avg
;
525 /* Two additional EEPROM bands for 2.4 and 5 GHz FAT channels */
526 for (band
= 6; band
<= 7; band
++) {
527 enum ieee80211_band ieeeband
;
528 u8 fat_extension_chan
;
530 iwl_init_band_reference(priv
, band
, &eeprom_ch_count
,
531 &eeprom_ch_info
, &eeprom_ch_index
);
533 /* EEPROM band 6 is 2.4, band 7 is 5 GHz */
535 (band
== 6) ? IEEE80211_BAND_2GHZ
: IEEE80211_BAND_5GHZ
;
537 /* Loop through each band adding each of the channels */
538 for (ch
= 0; ch
< eeprom_ch_count
; ch
++) {
541 ((eeprom_ch_index
[ch
] == 5) ||
542 (eeprom_ch_index
[ch
] == 6) ||
543 (eeprom_ch_index
[ch
] == 7)))
544 /* both are allowed: above and below */
545 fat_extension_chan
= 0;
548 IEEE80211_CHAN_NO_FAT_BELOW
;
550 /* Set up driver's info for lower half */
551 iwl_set_fat_chan_info(priv
, ieeeband
,
553 &(eeprom_ch_info
[ch
]),
556 /* Set up driver's info for upper half */
557 iwl_set_fat_chan_info(priv
, ieeeband
,
558 (eeprom_ch_index
[ch
] + 4),
559 &(eeprom_ch_info
[ch
]),
560 IEEE80211_CHAN_NO_FAT_ABOVE
);
566 EXPORT_SYMBOL(iwl_init_channel_map
);
569 * iwl_free_channel_map - undo allocations in iwl_init_channel_map
571 void iwl_free_channel_map(struct iwl_priv
*priv
)
573 kfree(priv
->channel_info
);
574 priv
->channel_count
= 0;
578 * iwl_get_channel_info - Find driver's private channel info
580 * Based on band and channel number.
582 const struct iwl_channel_info
*iwl_get_channel_info(const struct iwl_priv
*priv
,
583 enum ieee80211_band band
, u16 channel
)
588 case IEEE80211_BAND_5GHZ
:
589 for (i
= 14; i
< priv
->channel_count
; i
++) {
590 if (priv
->channel_info
[i
].channel
== channel
)
591 return &priv
->channel_info
[i
];
594 case IEEE80211_BAND_2GHZ
:
595 if (channel
>= 1 && channel
<= 14)
596 return &priv
->channel_info
[channel
- 1];
604 EXPORT_SYMBOL(iwl_get_channel_info
);