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 - 2010 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 * Intel Linux Wireless <ilw@linux.intel.com>
29 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
33 * Copyright(c) 2005 - 2010 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,
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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/slab.h>
67 #include <linux/init.h>
69 #include <net/mac80211.h>
71 #include "iwl-commands.h"
74 #include "iwl-debug.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 * struct iwl_txpwr_section: eeprom section information
111 * @offset: indirect address into eeprom image
112 * @count: number of "struct iwl_eeprom_enhanced_txpwr" in this section
113 * @band: band type for the section
114 * @is_common - true: common section, false: channel section
115 * @is_cck - true: cck section, false: not cck section
116 * @is_ht_40 - true: all channel in the section are HT40 channel,
117 * false: legacy or HT 20 MHz
118 * ignore if it is common section
119 * @iwl_eeprom_section_channel: channel array in the section,
120 * ignore if common section
122 struct iwl_txpwr_section
{
125 enum ieee80211_band band
;
129 u8 iwl_eeprom_section_channel
[EEPROM_MAX_TXPOWER_SECTION_ELEMENTS
];
133 * section 1 - 3 are regulatory tx power apply to all channels based on
134 * modulation: CCK, OFDM
135 * Band: 2.4GHz, 5.2GHz
136 * section 4 - 10 are regulatory tx power apply to specified channels
138 * 1L - Channel 1 Legacy
140 * (1,+1) - Channel 1 HT40 "_above_"
142 * Section 1: all CCK channels
143 * Section 2: all 2.4 GHz OFDM (Legacy, HT and HT40) channels
144 * Section 3: all 5.2 GHz OFDM (Legacy, HT and HT40) channels
145 * Section 4: 2.4 GHz 20MHz channels: 1L, 1HT, 2L, 2HT, 10L, 10HT, 11L, 11HT
146 * Section 5: 2.4 GHz 40MHz channels: (1,+1) (2,+1) (6,+1) (7,+1) (9,+1)
147 * Section 6: 5.2 GHz 20MHz channels: 36L, 64L, 100L, 36HT, 64HT, 100HT
148 * Section 7: 5.2 GHz 40MHz channels: (36,+1) (60,+1) (100,+1)
149 * Section 8: 2.4 GHz channel: 13L, 13HT
150 * Section 9: 2.4 GHz channel: 140L, 140HT
151 * Section 10: 2.4 GHz 40MHz channels: (132,+1) (44,+1)
154 static const struct iwl_txpwr_section enhinfo
[] = {
155 { EEPROM_LB_CCK_20_COMMON
, 1, IEEE80211_BAND_2GHZ
, true, true, false },
156 { EEPROM_LB_OFDM_COMMON
, 3, IEEE80211_BAND_2GHZ
, true, false, false },
157 { EEPROM_HB_OFDM_COMMON
, 3, IEEE80211_BAND_5GHZ
, true, false, false },
158 { EEPROM_LB_OFDM_20_BAND
, 8, IEEE80211_BAND_2GHZ
,
160 {1, 1, 2, 2, 10, 10, 11, 11 } },
161 { EEPROM_LB_OFDM_HT40_BAND
, 5, IEEE80211_BAND_2GHZ
,
164 { EEPROM_HB_OFDM_20_BAND
, 6, IEEE80211_BAND_5GHZ
,
166 { 36, 64, 100, 36, 64, 100 } },
167 { EEPROM_HB_OFDM_HT40_BAND
, 3, IEEE80211_BAND_5GHZ
,
170 { EEPROM_LB_OFDM_20_CHANNEL_13
, 2, IEEE80211_BAND_2GHZ
,
173 { EEPROM_HB_OFDM_20_CHANNEL_140
, 2, IEEE80211_BAND_5GHZ
,
176 { EEPROM_HB_OFDM_HT40_BAND_1
, 2, IEEE80211_BAND_5GHZ
,
181 /******************************************************************************
183 * EEPROM related functions
185 ******************************************************************************/
188 * The device's EEPROM semaphore prevents conflicts between driver and uCode
189 * when accessing the EEPROM; each access is a series of pulses to/from the
190 * EEPROM chip, not a single event, so even reads could conflict if they
191 * weren't arbitrated by the semaphore.
193 int iwlcore_eeprom_acquire_semaphore(struct iwl_priv
*priv
)
198 for (count
= 0; count
< EEPROM_SEM_RETRY_LIMIT
; count
++) {
199 /* Request semaphore */
200 iwl_set_bit(priv
, CSR_HW_IF_CONFIG_REG
,
201 CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM
);
203 /* See if we got it */
204 ret
= iwl_poll_bit(priv
, CSR_HW_IF_CONFIG_REG
,
205 CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM
,
206 CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM
,
210 "Acquired semaphore after %d tries.\n",
219 void iwlcore_eeprom_release_semaphore(struct iwl_priv
*priv
)
221 iwl_clear_bit(priv
, CSR_HW_IF_CONFIG_REG
,
222 CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM
);
226 int iwl_eeprom_check_version(struct iwl_priv
*priv
)
231 eeprom_ver
= iwl_eeprom_query16(priv
, EEPROM_VERSION
);
232 calib_ver
= priv
->cfg
->ops
->lib
->eeprom_ops
.calib_version(priv
);
234 if (eeprom_ver
< priv
->cfg
->eeprom_ver
||
235 calib_ver
< priv
->cfg
->eeprom_calib_ver
)
238 IWL_INFO(priv
, "device EEPROM VER=0x%x, CALIB=0x%x\n",
239 eeprom_ver
, calib_ver
);
243 IWL_ERR(priv
, "Unsupported (too old) EEPROM VER=0x%x < 0x%x "
244 "CALIB=0x%x < 0x%x\n",
245 eeprom_ver
, priv
->cfg
->eeprom_ver
,
246 calib_ver
, priv
->cfg
->eeprom_calib_ver
);
251 void iwl_eeprom_get_mac(const struct iwl_priv
*priv
, u8
*mac
)
253 const u8
*addr
= priv
->cfg
->ops
->lib
->eeprom_ops
.query_addr(priv
,
255 memcpy(mac
, addr
, ETH_ALEN
);
259 * iwl_get_max_txpower_avg - get the highest tx power from all chains.
260 * find the highest tx power from all chains for the channel
262 static s8
iwl_get_max_txpower_avg(struct iwl_priv
*priv
,
263 struct iwl_eeprom_enhanced_txpwr
*enhanced_txpower
,
264 int element
, s8
*max_txpower_in_half_dbm
)
266 s8 max_txpower_avg
= 0; /* (dBm) */
268 IWL_DEBUG_INFO(priv
, "%d - "
269 "chain_a: %d dB chain_b: %d dB "
270 "chain_c: %d dB mimo2: %d dB mimo3: %d dB\n",
272 enhanced_txpower
[element
].chain_a_max
>> 1,
273 enhanced_txpower
[element
].chain_b_max
>> 1,
274 enhanced_txpower
[element
].chain_c_max
>> 1,
275 enhanced_txpower
[element
].mimo2_max
>> 1,
276 enhanced_txpower
[element
].mimo3_max
>> 1);
277 /* Take the highest tx power from any valid chains */
278 if ((priv
->cfg
->valid_tx_ant
& ANT_A
) &&
279 (enhanced_txpower
[element
].chain_a_max
> max_txpower_avg
))
280 max_txpower_avg
= enhanced_txpower
[element
].chain_a_max
;
281 if ((priv
->cfg
->valid_tx_ant
& ANT_B
) &&
282 (enhanced_txpower
[element
].chain_b_max
> max_txpower_avg
))
283 max_txpower_avg
= enhanced_txpower
[element
].chain_b_max
;
284 if ((priv
->cfg
->valid_tx_ant
& ANT_C
) &&
285 (enhanced_txpower
[element
].chain_c_max
> max_txpower_avg
))
286 max_txpower_avg
= enhanced_txpower
[element
].chain_c_max
;
287 if (((priv
->cfg
->valid_tx_ant
== ANT_AB
) |
288 (priv
->cfg
->valid_tx_ant
== ANT_BC
) |
289 (priv
->cfg
->valid_tx_ant
== ANT_AC
)) &&
290 (enhanced_txpower
[element
].mimo2_max
> max_txpower_avg
))
291 max_txpower_avg
= enhanced_txpower
[element
].mimo2_max
;
292 if ((priv
->cfg
->valid_tx_ant
== ANT_ABC
) &&
293 (enhanced_txpower
[element
].mimo3_max
> max_txpower_avg
))
294 max_txpower_avg
= enhanced_txpower
[element
].mimo3_max
;
297 * max. tx power in EEPROM is in 1/2 dBm format
298 * convert from 1/2 dBm to dBm (round-up convert)
299 * but we also do not want to loss 1/2 dBm resolution which
300 * will impact performance
302 *max_txpower_in_half_dbm
= max_txpower_avg
;
303 return (max_txpower_avg
& 0x01) + (max_txpower_avg
>> 1);
307 * iwl_update_common_txpower: update channel tx power
308 * update tx power per band based on EEPROM enhanced tx power info.
310 static s8
iwl_update_common_txpower(struct iwl_priv
*priv
,
311 struct iwl_eeprom_enhanced_txpwr
*enhanced_txpower
,
312 int section
, int element
, s8
*max_txpower_in_half_dbm
)
314 struct iwl_channel_info
*ch_info
;
316 bool is_ht40
= false;
317 s8 max_txpower_avg
; /* (dBm) */
319 /* it is common section, contain all type (Legacy, HT and HT40)
320 * based on the element in the section to determine
323 if (element
== EEPROM_TXPOWER_COMMON_HT40_INDEX
)
326 iwl_get_max_txpower_avg(priv
, enhanced_txpower
,
327 element
, max_txpower_in_half_dbm
);
329 ch_info
= priv
->channel_info
;
331 for (ch
= 0; ch
< priv
->channel_count
; ch
++) {
332 /* find matching band and update tx power if needed */
333 if ((ch_info
->band
== enhinfo
[section
].band
) &&
334 (ch_info
->max_power_avg
< max_txpower_avg
) &&
336 /* Update regulatory-based run-time data */
337 ch_info
->max_power_avg
= ch_info
->curr_txpow
=
339 ch_info
->scan_power
= max_txpower_avg
;
341 if ((ch_info
->band
== enhinfo
[section
].band
) && is_ht40
&&
342 (ch_info
->ht40_max_power_avg
< max_txpower_avg
)) {
343 /* Update regulatory-based run-time data */
344 ch_info
->ht40_max_power_avg
= max_txpower_avg
;
348 return max_txpower_avg
;
352 * iwl_update_channel_txpower: update channel tx power
353 * update channel tx power based on EEPROM enhanced tx power info.
355 static s8
iwl_update_channel_txpower(struct iwl_priv
*priv
,
356 struct iwl_eeprom_enhanced_txpwr
*enhanced_txpower
,
357 int section
, int element
, s8
*max_txpower_in_half_dbm
)
359 struct iwl_channel_info
*ch_info
;
362 s8 max_txpower_avg
; /* (dBm) */
364 channel
= enhinfo
[section
].iwl_eeprom_section_channel
[element
];
366 iwl_get_max_txpower_avg(priv
, enhanced_txpower
,
367 element
, max_txpower_in_half_dbm
);
369 ch_info
= priv
->channel_info
;
370 for (ch
= 0; ch
< priv
->channel_count
; ch
++) {
371 /* find matching channel and update tx power if needed */
372 if (ch_info
->channel
== channel
) {
373 if ((ch_info
->max_power_avg
< max_txpower_avg
) &&
374 (!enhinfo
[section
].is_ht40
)) {
375 /* Update regulatory-based run-time data */
376 ch_info
->max_power_avg
= max_txpower_avg
;
377 ch_info
->curr_txpow
= max_txpower_avg
;
378 ch_info
->scan_power
= max_txpower_avg
;
380 if ((enhinfo
[section
].is_ht40
) &&
381 (ch_info
->ht40_max_power_avg
< max_txpower_avg
)) {
382 /* Update regulatory-based run-time data */
383 ch_info
->ht40_max_power_avg
= max_txpower_avg
;
389 return max_txpower_avg
;
393 * iwlcore_eeprom_enhanced_txpower: process enhanced tx power info
395 void iwlcore_eeprom_enhanced_txpower(struct iwl_priv
*priv
)
397 int eeprom_section_count
= 0;
398 int section
, element
;
399 struct iwl_eeprom_enhanced_txpwr
*enhanced_txpower
;
401 s8 max_txpower_avg
; /* (dBm) */
402 s8 max_txpower_in_half_dbm
; /* (half-dBm) */
404 /* Loop through all the sections
405 * adjust bands and channel's max tx power
406 * Set the tx_power_user_lmt to the highest power
407 * supported by any channels and chains
409 for (section
= 0; section
< ARRAY_SIZE(enhinfo
); section
++) {
410 eeprom_section_count
= enhinfo
[section
].count
;
411 offset
= enhinfo
[section
].offset
;
412 enhanced_txpower
= (struct iwl_eeprom_enhanced_txpwr
*)
413 iwl_eeprom_query_addr(priv
, offset
);
416 * check for valid entry -
417 * different version of EEPROM might contain different set
418 * of enhanced tx power table
419 * always check for valid entry before process
422 if (!enhanced_txpower
->common
|| enhanced_txpower
->reserved
)
425 for (element
= 0; element
< eeprom_section_count
; element
++) {
426 if (enhinfo
[section
].is_common
)
428 iwl_update_common_txpower(priv
,
429 enhanced_txpower
, section
,
431 &max_txpower_in_half_dbm
);
434 iwl_update_channel_txpower(priv
,
435 enhanced_txpower
, section
,
437 &max_txpower_in_half_dbm
);
439 /* Update the tx_power_user_lmt to the highest power
440 * supported by any channel */
441 if (max_txpower_avg
> priv
->tx_power_user_lmt
)
442 priv
->tx_power_user_lmt
= max_txpower_avg
;
445 * Update the tx_power_lmt_in_half_dbm to
446 * the highest power supported by any channel
448 if (max_txpower_in_half_dbm
>
449 priv
->tx_power_lmt_in_half_dbm
)
450 priv
->tx_power_lmt_in_half_dbm
=
451 max_txpower_in_half_dbm
;