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 - 2009 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 - 2009 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 ht40 channel */
134 static const u8 iwl_eeprom_band_7[] = { /* 5.2 ht40 channel */
135 36, 44, 52, 60, 100, 108, 116, 124, 132, 149, 157
139 * struct iwl_txpwr_section: eeprom section information
140 * @offset: indirect address into eeprom image
141 * @count: number of "struct iwl_eeprom_enhanced_txpwr" in this section
142 * @band: band type for the section
143 * @is_common - true: common section, false: channel section
144 * @is_cck - true: cck section, false: not cck section
145 * @is_ht_40 - true: all channel in the section are HT40 channel,
146 * false: legacy or HT 20 MHz
147 * ignore if it is common section
148 * @iwl_eeprom_section_channel: channel array in the section,
149 * ignore if common section
151 struct iwl_txpwr_section {
154 enum ieee80211_band band;
158 u8 iwl_eeprom_section_channel[EEPROM_MAX_TXPOWER_SECTION_ELEMENTS];
162 * section 1 - 3 are regulatory tx power apply to all channels based on
163 * modulation: CCK, OFDM
164 * Band: 2.4GHz, 5.2GHz
165 * section 4 - 10 are regulatory tx power apply to specified channels
167 * 1L - Channel 1 Legacy
169 * (1,+1) - Channel 1 HT40 "_above_"
171 * Section 1: all CCK channels
172 * Section 2: all 2.4 GHz OFDM (Legacy, HT and HT40) channels
173 * Section 3: all 5.2 GHz OFDM (Legacy, HT and HT40) channels
174 * Section 4: 2.4 GHz 20MHz channels: 1L, 1HT, 2L, 2HT, 10L, 10HT, 11L, 11HT
175 * Section 5: 2.4 GHz 40MHz channels: (1,+1) (2,+1) (6,+1) (7,+1) (9,+1)
176 * Section 6: 5.2 GHz 20MHz channels: 36L, 64L, 100L, 36HT, 64HT, 100HT
177 * Section 7: 5.2 GHz 40MHz channels: (36,+1) (60,+1) (100,+1)
178 * Section 8: 2.4 GHz channel: 13L, 13HT
179 * Section 9: 2.4 GHz channel: 140L, 140HT
180 * Section 10: 2.4 GHz 40MHz channels: (132,+1) (44,+1)
183 static const struct iwl_txpwr_section enhinfo[] = {
184 { EEPROM_LB_CCK_20_COMMON, 1, IEEE80211_BAND_2GHZ, true, true, false },
185 { EEPROM_LB_OFDM_COMMON, 3, IEEE80211_BAND_2GHZ, true, false, false },
186 { EEPROM_HB_OFDM_COMMON, 3, IEEE80211_BAND_5GHZ, true, false, false },
187 { EEPROM_LB_OFDM_20_BAND, 8, IEEE80211_BAND_2GHZ,
189 {1, 1, 2, 2, 10, 10, 11, 11 } },
190 { EEPROM_LB_OFDM_HT40_BAND, 5, IEEE80211_BAND_2GHZ,
193 { EEPROM_HB_OFDM_20_BAND, 6, IEEE80211_BAND_5GHZ,
195 { 36, 64, 100, 36, 64, 100 } },
196 { EEPROM_HB_OFDM_HT40_BAND, 3, IEEE80211_BAND_5GHZ,
199 { EEPROM_LB_OFDM_20_CHANNEL_13, 2, IEEE80211_BAND_2GHZ,
202 { EEPROM_HB_OFDM_20_CHANNEL_140, 2, IEEE80211_BAND_5GHZ,
205 { EEPROM_HB_OFDM_HT40_BAND_1, 2, IEEE80211_BAND_5GHZ,
210 /******************************************************************************
212 * EEPROM related functions
214 ******************************************************************************/
216 int iwlcore_eeprom_verify_signature(struct iwl_priv *priv)
218 u32 gp = iwl_read32(priv, CSR_EEPROM_GP) & CSR_EEPROM_GP_VALID_MSK;
221 IWL_DEBUG_INFO(priv, "EEPROM signature=0x%08x\n", gp);
223 case CSR_EEPROM_GP_BAD_SIG_EEP_GOOD_SIG_OTP:
224 if (priv->nvm_device_type != NVM_DEVICE_TYPE_OTP) {
225 IWL_ERR(priv, "EEPROM with bad signature: 0x%08x\n",
230 case CSR_EEPROM_GP_GOOD_SIG_EEP_LESS_THAN_4K:
231 case CSR_EEPROM_GP_GOOD_SIG_EEP_MORE_THAN_4K:
232 if (priv->nvm_device_type != NVM_DEVICE_TYPE_EEPROM) {
233 IWL_ERR(priv, "OTP with bad signature: 0x%08x\n", gp);
237 case CSR_EEPROM_GP_BAD_SIGNATURE_BOTH_EEP_AND_OTP:
239 IWL_ERR(priv, "bad EEPROM/OTP signature, type=%s, "
240 "EEPROM_GP=0x%08x\n",
241 (priv->nvm_device_type == NVM_DEVICE_TYPE_OTP)
242 ? "OTP" : "EEPROM", gp);
248 EXPORT_SYMBOL(iwlcore_eeprom_verify_signature);
250 static void iwl_set_otp_access(struct iwl_priv *priv, enum iwl_access_mode mode)
254 otpgp = iwl_read32(priv, CSR_OTP_GP_REG);
255 if (mode == IWL_OTP_ACCESS_ABSOLUTE)
256 iwl_clear_bit(priv, CSR_OTP_GP_REG,
257 CSR_OTP_GP_REG_OTP_ACCESS_MODE);
259 iwl_set_bit(priv, CSR_OTP_GP_REG,
260 CSR_OTP_GP_REG_OTP_ACCESS_MODE);
263 static int iwlcore_get_nvm_type(struct iwl_priv *priv)
268 /* OTP only valid for CP/PP and after */
269 switch (priv->hw_rev & CSR_HW_REV_TYPE_MSK) {
270 case CSR_HW_REV_TYPE_NONE:
271 IWL_ERR(priv, "Unknown hardware type\n");
273 case CSR_HW_REV_TYPE_3945:
274 case CSR_HW_REV_TYPE_4965:
275 case CSR_HW_REV_TYPE_5300:
276 case CSR_HW_REV_TYPE_5350:
277 case CSR_HW_REV_TYPE_5100:
278 case CSR_HW_REV_TYPE_5150:
279 nvm_type = NVM_DEVICE_TYPE_EEPROM;
282 otpgp = iwl_read32(priv, CSR_OTP_GP_REG);
283 if (otpgp & CSR_OTP_GP_REG_DEVICE_SELECT)
284 nvm_type = NVM_DEVICE_TYPE_OTP;
286 nvm_type = NVM_DEVICE_TYPE_EEPROM;
293 * The device's EEPROM semaphore prevents conflicts between driver and uCode
294 * when accessing the EEPROM; each access is a series of pulses to/from the
295 * EEPROM chip, not a single event, so even reads could conflict if they
296 * weren't arbitrated by the semaphore.
298 int iwlcore_eeprom_acquire_semaphore(struct iwl_priv *priv)
303 for (count = 0; count < EEPROM_SEM_RETRY_LIMIT; count++) {
304 /* Request semaphore */
305 iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
306 CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM);
308 /* See if we got it */
309 ret = iwl_poll_bit(priv, CSR_HW_IF_CONFIG_REG,
310 CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM,
311 CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM,
314 IWL_DEBUG_IO(priv, "Acquired semaphore after %d tries.\n",
322 EXPORT_SYMBOL(iwlcore_eeprom_acquire_semaphore);
324 void iwlcore_eeprom_release_semaphore(struct iwl_priv *priv)
326 iwl_clear_bit(priv, CSR_HW_IF_CONFIG_REG,
327 CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM);
330 EXPORT_SYMBOL(iwlcore_eeprom_release_semaphore);
332 const u8 *iwlcore_eeprom_query_addr(const struct iwl_priv *priv, size_t offset)
334 BUG_ON(offset >= priv->cfg->eeprom_size);
335 return &priv->eeprom[offset];
337 EXPORT_SYMBOL(iwlcore_eeprom_query_addr);
339 static int iwl_init_otp_access(struct iwl_priv *priv)
343 /* Enable 40MHz radio clock */
344 _iwl_write32(priv, CSR_GP_CNTRL,
345 _iwl_read32(priv, CSR_GP_CNTRL) |
346 CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
348 /* wait for clock to be ready */
349 ret = iwl_poll_bit(priv, CSR_GP_CNTRL,
350 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
351 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
354 IWL_ERR(priv, "Time out access OTP\n");
356 iwl_set_bits_prph(priv, APMG_PS_CTRL_REG,
357 APMG_PS_CTRL_VAL_RESET_REQ);
359 iwl_clear_bits_prph(priv, APMG_PS_CTRL_REG,
360 APMG_PS_CTRL_VAL_RESET_REQ);
363 * CSR auto clock gate disable bit -
364 * this is only applicable for HW with OTP shadow RAM
366 if (priv->cfg->shadow_ram_support)
367 iwl_set_bit(priv, CSR_DBG_LINK_PWR_MGMT_REG,
368 CSR_RESET_LINK_PWR_MGMT_DISABLED);
373 static int iwl_read_otp_word(struct iwl_priv *priv, u16 addr, u16 *eeprom_data)
379 _iwl_write32(priv, CSR_EEPROM_REG,
380 CSR_EEPROM_REG_MSK_ADDR & (addr << 1));
381 ret = iwl_poll_bit(priv, CSR_EEPROM_REG,
382 CSR_EEPROM_REG_READ_VALID_MSK,
383 CSR_EEPROM_REG_READ_VALID_MSK,
384 IWL_EEPROM_ACCESS_TIMEOUT);
386 IWL_ERR(priv, "Time out reading OTP[%d]\n", addr);
389 r = _iwl_read_direct32(priv, CSR_EEPROM_REG);
390 /* check for ECC errors: */
391 otpgp = iwl_read32(priv, CSR_OTP_GP_REG);
392 if (otpgp & CSR_OTP_GP_REG_ECC_UNCORR_STATUS_MSK) {
393 /* stop in this case */
394 /* set the uncorrectable OTP ECC bit for acknowledgement */
395 iwl_set_bit(priv, CSR_OTP_GP_REG,
396 CSR_OTP_GP_REG_ECC_UNCORR_STATUS_MSK);
397 IWL_ERR(priv, "Uncorrectable OTP ECC error, abort OTP read\n");
400 if (otpgp & CSR_OTP_GP_REG_ECC_CORR_STATUS_MSK) {
401 /* continue in this case */
402 /* set the correctable OTP ECC bit for acknowledgement */
403 iwl_set_bit(priv, CSR_OTP_GP_REG,
404 CSR_OTP_GP_REG_ECC_CORR_STATUS_MSK);
405 IWL_ERR(priv, "Correctable OTP ECC error, continue read\n");
407 *eeprom_data = le16_to_cpu((__force __le16)(r >> 16));
412 * iwl_is_otp_empty: check for empty OTP
414 static bool iwl_is_otp_empty(struct iwl_priv *priv)
416 u16 next_link_addr = 0, link_value;
417 bool is_empty = false;
419 /* locate the beginning of OTP link list */
420 if (!iwl_read_otp_word(priv, next_link_addr, &link_value)) {
422 IWL_ERR(priv, "OTP is empty\n");
426 IWL_ERR(priv, "Unable to read first block of OTP list.\n");
435 * iwl_find_otp_image: find EEPROM image in OTP
436 * finding the OTP block that contains the EEPROM image.
437 * the last valid block on the link list (the block _before_ the last block)
438 * is the block we should read and used to configure the device.
439 * If all the available OTP blocks are full, the last block will be the block
440 * we should read and used to configure the device.
441 * only perform this operation if shadow RAM is disabled
443 static int iwl_find_otp_image(struct iwl_priv *priv,
446 u16 next_link_addr = 0, link_value = 0, valid_addr;
449 /* set addressing mode to absolute to traverse the link list */
450 iwl_set_otp_access(priv, IWL_OTP_ACCESS_ABSOLUTE);
452 /* checking for empty OTP or error */
453 if (iwl_is_otp_empty(priv))
457 * start traverse link list
458 * until reach the max number of OTP blocks
459 * different devices have different number of OTP blocks
462 /* save current valid block address
463 * check for more block on the link list
465 valid_addr = next_link_addr;
466 next_link_addr = link_value * sizeof(u16);
467 IWL_DEBUG_INFO(priv, "OTP blocks %d addr 0x%x\n",
468 usedblocks, next_link_addr);
469 if (iwl_read_otp_word(priv, next_link_addr, &link_value))
473 * reach the end of link list, return success and
474 * set address point to the starting address
477 *validblockaddr = valid_addr;
478 /* skip first 2 bytes (link list pointer) */
479 *validblockaddr += 2;
482 /* more in the link list, continue */
484 } while (usedblocks <= priv->cfg->max_ll_items);
486 /* OTP has no valid blocks */
487 IWL_DEBUG_INFO(priv, "OTP has no valid blocks\n");
492 * iwl_eeprom_init - read EEPROM contents
494 * Load the EEPROM contents from adapter into priv->eeprom
496 * NOTE: This routine uses the non-debug IO access functions.
498 int iwl_eeprom_init(struct iwl_priv *priv)
501 u32 gp = iwl_read32(priv, CSR_EEPROM_GP);
505 u16 validblockaddr = 0;
508 priv->nvm_device_type = iwlcore_get_nvm_type(priv);
509 if (priv->nvm_device_type == -ENOENT)
511 /* allocate eeprom */
512 IWL_DEBUG_INFO(priv, "NVM size = %d\n", priv->cfg->eeprom_size);
513 sz = priv->cfg->eeprom_size;
514 priv->eeprom = kzalloc(sz, GFP_KERNEL);
519 e = (u16 *)priv->eeprom;
521 priv->cfg->ops->lib->apm_ops.init(priv);
523 ret = priv->cfg->ops->lib->eeprom_ops.verify_signature(priv);
525 IWL_ERR(priv, "EEPROM not found, EEPROM_GP=0x%08x\n", gp);
530 /* Make sure driver (instead of uCode) is allowed to read EEPROM */
531 ret = priv->cfg->ops->lib->eeprom_ops.acquire_semaphore(priv);
533 IWL_ERR(priv, "Failed to acquire EEPROM semaphore.\n");
538 if (priv->nvm_device_type == NVM_DEVICE_TYPE_OTP) {
540 ret = iwl_init_otp_access(priv);
542 IWL_ERR(priv, "Failed to initialize OTP access.\n");
546 _iwl_write32(priv, CSR_EEPROM_GP,
547 iwl_read32(priv, CSR_EEPROM_GP) &
548 ~CSR_EEPROM_GP_IF_OWNER_MSK);
550 iwl_set_bit(priv, CSR_OTP_GP_REG,
551 CSR_OTP_GP_REG_ECC_CORR_STATUS_MSK |
552 CSR_OTP_GP_REG_ECC_UNCORR_STATUS_MSK);
553 /* traversing the linked list if no shadow ram supported */
554 if (!priv->cfg->shadow_ram_support) {
555 if (iwl_find_otp_image(priv, &validblockaddr)) {
560 for (addr = validblockaddr; addr < validblockaddr + sz;
561 addr += sizeof(u16)) {
564 ret = iwl_read_otp_word(priv, addr, &eeprom_data);
567 e[cache_addr / 2] = eeprom_data;
568 cache_addr += sizeof(u16);
571 /* eeprom is an array of 16bit values */
572 for (addr = 0; addr < sz; addr += sizeof(u16)) {
575 _iwl_write32(priv, CSR_EEPROM_REG,
576 CSR_EEPROM_REG_MSK_ADDR & (addr << 1));
578 ret = iwl_poll_bit(priv, CSR_EEPROM_REG,
579 CSR_EEPROM_REG_READ_VALID_MSK,
580 CSR_EEPROM_REG_READ_VALID_MSK,
581 IWL_EEPROM_ACCESS_TIMEOUT);
583 IWL_ERR(priv, "Time out reading EEPROM[%d]\n", addr);
586 r = _iwl_read_direct32(priv, CSR_EEPROM_REG);
587 e[addr / 2] = le16_to_cpu((__force __le16)(r >> 16));
592 priv->cfg->ops->lib->eeprom_ops.release_semaphore(priv);
595 iwl_eeprom_free(priv);
596 /* Reset chip to save power until we load uCode during "up". */
597 priv->cfg->ops->lib->apm_ops.stop(priv);
601 EXPORT_SYMBOL(iwl_eeprom_init);
603 void iwl_eeprom_free(struct iwl_priv *priv)
608 EXPORT_SYMBOL(iwl_eeprom_free);
610 int iwl_eeprom_check_version(struct iwl_priv *priv)
615 eeprom_ver = iwl_eeprom_query16(priv, EEPROM_VERSION);
616 calib_ver = priv->cfg->ops->lib->eeprom_ops.calib_version(priv);
618 if (eeprom_ver < priv->cfg->eeprom_ver ||
619 calib_ver < priv->cfg->eeprom_calib_ver)
624 IWL_ERR(priv, "Unsupported (too old) EEPROM VER=0x%x < 0x%x CALIB=0x%x < 0x%x\n",
625 eeprom_ver, priv->cfg->eeprom_ver,
626 calib_ver, priv->cfg->eeprom_calib_ver);
630 EXPORT_SYMBOL(iwl_eeprom_check_version);
632 const u8 *iwl_eeprom_query_addr(const struct iwl_priv *priv, size_t offset)
634 return priv->cfg->ops->lib->eeprom_ops.query_addr(priv, offset);
636 EXPORT_SYMBOL(iwl_eeprom_query_addr);
638 u16 iwl_eeprom_query16(const struct iwl_priv *priv, size_t offset)
642 return (u16)priv->eeprom[offset] | ((u16)priv->eeprom[offset + 1] << 8);
644 EXPORT_SYMBOL(iwl_eeprom_query16);
646 void iwl_eeprom_get_mac(const struct iwl_priv *priv, u8 *mac)
648 const u8 *addr = priv->cfg->ops->lib->eeprom_ops.query_addr(priv,
650 memcpy(mac, addr, ETH_ALEN);
652 EXPORT_SYMBOL(iwl_eeprom_get_mac);
654 static void iwl_init_band_reference(const struct iwl_priv *priv,
655 int eep_band, int *eeprom_ch_count,
656 const struct iwl_eeprom_channel **eeprom_ch_info,
657 const u8 **eeprom_ch_index)
659 u32 offset = priv->cfg->ops->lib->
660 eeprom_ops.regulatory_bands[eep_band - 1];
662 case 1: /* 2.4GHz band */
663 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_1);
664 *eeprom_ch_info = (struct iwl_eeprom_channel *)
665 iwl_eeprom_query_addr(priv, offset);
666 *eeprom_ch_index = iwl_eeprom_band_1;
668 case 2: /* 4.9GHz band */
669 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_2);
670 *eeprom_ch_info = (struct iwl_eeprom_channel *)
671 iwl_eeprom_query_addr(priv, offset);
672 *eeprom_ch_index = iwl_eeprom_band_2;
674 case 3: /* 5.2GHz band */
675 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_3);
676 *eeprom_ch_info = (struct iwl_eeprom_channel *)
677 iwl_eeprom_query_addr(priv, offset);
678 *eeprom_ch_index = iwl_eeprom_band_3;
680 case 4: /* 5.5GHz band */
681 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_4);
682 *eeprom_ch_info = (struct iwl_eeprom_channel *)
683 iwl_eeprom_query_addr(priv, offset);
684 *eeprom_ch_index = iwl_eeprom_band_4;
686 case 5: /* 5.7GHz band */
687 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_5);
688 *eeprom_ch_info = (struct iwl_eeprom_channel *)
689 iwl_eeprom_query_addr(priv, offset);
690 *eeprom_ch_index = iwl_eeprom_band_5;
692 case 6: /* 2.4GHz ht40 channels */
693 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_6);
694 *eeprom_ch_info = (struct iwl_eeprom_channel *)
695 iwl_eeprom_query_addr(priv, offset);
696 *eeprom_ch_index = iwl_eeprom_band_6;
698 case 7: /* 5 GHz ht40 channels */
699 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_7);
700 *eeprom_ch_info = (struct iwl_eeprom_channel *)
701 iwl_eeprom_query_addr(priv, offset);
702 *eeprom_ch_index = iwl_eeprom_band_7;
710 #define CHECK_AND_PRINT(x) ((eeprom_ch->flags & EEPROM_CHANNEL_##x) \
714 * iwl_mod_ht40_chan_info - Copy ht40 channel info into driver's priv.
716 * Does not set up a command, or touch hardware.
718 static int iwl_mod_ht40_chan_info(struct iwl_priv *priv,
719 enum ieee80211_band band, u16 channel,
720 const struct iwl_eeprom_channel *eeprom_ch,
721 u8 clear_ht40_extension_channel)
723 struct iwl_channel_info *ch_info;
725 ch_info = (struct iwl_channel_info *)
726 iwl_get_channel_info(priv, band, channel);
728 if (!is_channel_valid(ch_info))
731 IWL_DEBUG_INFO(priv, "HT40 Ch. %d [%sGHz] %s%s%s%s%s(0x%02x %ddBm):"
732 " Ad-Hoc %ssupported\n",
734 is_channel_a_band(ch_info) ?
736 CHECK_AND_PRINT(IBSS),
737 CHECK_AND_PRINT(ACTIVE),
738 CHECK_AND_PRINT(RADAR),
739 CHECK_AND_PRINT(WIDE),
740 CHECK_AND_PRINT(DFS),
742 eeprom_ch->max_power_avg,
743 ((eeprom_ch->flags & EEPROM_CHANNEL_IBSS)
744 && !(eeprom_ch->flags & EEPROM_CHANNEL_RADAR)) ?
747 ch_info->ht40_eeprom = *eeprom_ch;
748 ch_info->ht40_max_power_avg = eeprom_ch->max_power_avg;
749 ch_info->ht40_flags = eeprom_ch->flags;
750 ch_info->ht40_extension_channel &= ~clear_ht40_extension_channel;
756 * iwl_get_max_txpower_avg - get the highest tx power from all chains.
757 * find the highest tx power from all chains for the channel
759 static s8 iwl_get_max_txpower_avg(struct iwl_priv *priv,
760 struct iwl_eeprom_enhanced_txpwr *enhanced_txpower,
761 int element, s8 *max_txpower_in_half_dbm)
763 s8 max_txpower_avg = 0; /* (dBm) */
765 IWL_DEBUG_INFO(priv, "%d - "
766 "chain_a: %d dB chain_b: %d dB "
767 "chain_c: %d dB mimo2: %d dB mimo3: %d dB\n",
769 enhanced_txpower[element].chain_a_max >> 1,
770 enhanced_txpower[element].chain_b_max >> 1,
771 enhanced_txpower[element].chain_c_max >> 1,
772 enhanced_txpower[element].mimo2_max >> 1,
773 enhanced_txpower[element].mimo3_max >> 1);
774 /* Take the highest tx power from any valid chains */
775 if ((priv->cfg->valid_tx_ant & ANT_A) &&
776 (enhanced_txpower[element].chain_a_max > max_txpower_avg))
777 max_txpower_avg = enhanced_txpower[element].chain_a_max;
778 if ((priv->cfg->valid_tx_ant & ANT_B) &&
779 (enhanced_txpower[element].chain_b_max > max_txpower_avg))
780 max_txpower_avg = enhanced_txpower[element].chain_b_max;
781 if ((priv->cfg->valid_tx_ant & ANT_C) &&
782 (enhanced_txpower[element].chain_c_max > max_txpower_avg))
783 max_txpower_avg = enhanced_txpower[element].chain_c_max;
784 if (((priv->cfg->valid_tx_ant == ANT_AB) |
785 (priv->cfg->valid_tx_ant == ANT_BC) |
786 (priv->cfg->valid_tx_ant == ANT_AC)) &&
787 (enhanced_txpower[element].mimo2_max > max_txpower_avg))
788 max_txpower_avg = enhanced_txpower[element].mimo2_max;
789 if ((priv->cfg->valid_tx_ant == ANT_ABC) &&
790 (enhanced_txpower[element].mimo3_max > max_txpower_avg))
791 max_txpower_avg = enhanced_txpower[element].mimo3_max;
794 * max. tx power in EEPROM is in 1/2 dBm format
795 * convert from 1/2 dBm to dBm (round-up convert)
796 * but we also do not want to loss 1/2 dBm resolution which
797 * will impact performance
799 *max_txpower_in_half_dbm = max_txpower_avg;
800 return (max_txpower_avg & 0x01) + (max_txpower_avg >> 1);
804 * iwl_update_common_txpower: update channel tx power
805 * update tx power per band based on EEPROM enhanced tx power info.
807 static s8 iwl_update_common_txpower(struct iwl_priv *priv,
808 struct iwl_eeprom_enhanced_txpwr *enhanced_txpower,
809 int section, int element, s8 *max_txpower_in_half_dbm)
811 struct iwl_channel_info *ch_info;
813 bool is_ht40 = false;
814 s8 max_txpower_avg; /* (dBm) */
816 /* it is common section, contain all type (Legacy, HT and HT40)
817 * based on the element in the section to determine
820 if (element == EEPROM_TXPOWER_COMMON_HT40_INDEX)
823 iwl_get_max_txpower_avg(priv, enhanced_txpower,
824 element, max_txpower_in_half_dbm);
826 ch_info = priv->channel_info;
828 for (ch = 0; ch < priv->channel_count; ch++) {
829 /* find matching band and update tx power if needed */
830 if ((ch_info->band == enhinfo[section].band) &&
831 (ch_info->max_power_avg < max_txpower_avg) &&
833 /* Update regulatory-based run-time data */
834 ch_info->max_power_avg = ch_info->curr_txpow =
836 ch_info->scan_power = max_txpower_avg;
838 if ((ch_info->band == enhinfo[section].band) && is_ht40 &&
839 (ch_info->ht40_max_power_avg < max_txpower_avg)) {
840 /* Update regulatory-based run-time data */
841 ch_info->ht40_max_power_avg = max_txpower_avg;
845 return max_txpower_avg;
849 * iwl_update_channel_txpower: update channel tx power
850 * update channel tx power based on EEPROM enhanced tx power info.
852 static s8 iwl_update_channel_txpower(struct iwl_priv *priv,
853 struct iwl_eeprom_enhanced_txpwr *enhanced_txpower,
854 int section, int element, s8 *max_txpower_in_half_dbm)
856 struct iwl_channel_info *ch_info;
859 s8 max_txpower_avg; /* (dBm) */
861 channel = enhinfo[section].iwl_eeprom_section_channel[element];
863 iwl_get_max_txpower_avg(priv, enhanced_txpower,
864 element, max_txpower_in_half_dbm);
866 ch_info = priv->channel_info;
867 for (ch = 0; ch < priv->channel_count; ch++) {
868 /* find matching channel and update tx power if needed */
869 if (ch_info->channel == channel) {
870 if ((ch_info->max_power_avg < max_txpower_avg) &&
871 (!enhinfo[section].is_ht40)) {
872 /* Update regulatory-based run-time data */
873 ch_info->max_power_avg = max_txpower_avg;
874 ch_info->curr_txpow = max_txpower_avg;
875 ch_info->scan_power = max_txpower_avg;
877 if ((enhinfo[section].is_ht40) &&
878 (ch_info->ht40_max_power_avg < max_txpower_avg)) {
879 /* Update regulatory-based run-time data */
880 ch_info->ht40_max_power_avg = max_txpower_avg;
886 return max_txpower_avg;
890 * iwlcore_eeprom_enhanced_txpower: process enhanced tx power info
892 void iwlcore_eeprom_enhanced_txpower(struct iwl_priv *priv)
894 int eeprom_section_count = 0;
895 int section, element;
896 struct iwl_eeprom_enhanced_txpwr *enhanced_txpower;
898 s8 max_txpower_avg; /* (dBm) */
899 s8 max_txpower_in_half_dbm; /* (half-dBm) */
901 /* Loop through all the sections
902 * adjust bands and channel's max tx power
903 * Set the tx_power_user_lmt to the highest power
904 * supported by any channels and chains
906 for (section = 0; section < ARRAY_SIZE(enhinfo); section++) {
907 eeprom_section_count = enhinfo[section].count;
908 offset = enhinfo[section].offset;
909 enhanced_txpower = (struct iwl_eeprom_enhanced_txpwr *)
910 iwl_eeprom_query_addr(priv, offset);
913 * check for valid entry -
914 * different version of EEPROM might contain different set
915 * of enhanced tx power table
916 * always check for valid entry before process
919 if (!enhanced_txpower->common || enhanced_txpower->reserved)
922 for (element = 0; element < eeprom_section_count; element++) {
923 if (enhinfo[section].is_common)
925 iwl_update_common_txpower(priv,
926 enhanced_txpower, section,
928 &max_txpower_in_half_dbm);
931 iwl_update_channel_txpower(priv,
932 enhanced_txpower, section,
934 &max_txpower_in_half_dbm);
936 /* Update the tx_power_user_lmt to the highest power
937 * supported by any channel */
938 if (max_txpower_avg > priv->tx_power_user_lmt)
939 priv->tx_power_user_lmt = max_txpower_avg;
942 * Update the tx_power_lmt_in_half_dbm to
943 * the highest power supported by any channel
945 if (max_txpower_in_half_dbm >
946 priv->tx_power_lmt_in_half_dbm)
947 priv->tx_power_lmt_in_half_dbm =
948 max_txpower_in_half_dbm;
952 EXPORT_SYMBOL(iwlcore_eeprom_enhanced_txpower);
954 #define CHECK_AND_PRINT_I(x) ((eeprom_ch_info[ch].flags & EEPROM_CHANNEL_##x) \
958 * iwl_init_channel_map - Set up driver's info for all possible channels
960 int iwl_init_channel_map(struct iwl_priv *priv)
962 int eeprom_ch_count = 0;
963 const u8 *eeprom_ch_index = NULL;
964 const struct iwl_eeprom_channel *eeprom_ch_info = NULL;
966 struct iwl_channel_info *ch_info;
968 if (priv->channel_count) {
969 IWL_DEBUG_INFO(priv, "Channel map already initialized.\n");
973 IWL_DEBUG_INFO(priv, "Initializing regulatory info from EEPROM\n");
975 priv->channel_count =
976 ARRAY_SIZE(iwl_eeprom_band_1) +
977 ARRAY_SIZE(iwl_eeprom_band_2) +
978 ARRAY_SIZE(iwl_eeprom_band_3) +
979 ARRAY_SIZE(iwl_eeprom_band_4) +
980 ARRAY_SIZE(iwl_eeprom_band_5);
982 IWL_DEBUG_INFO(priv, "Parsing data for %d channels.\n", priv->channel_count);
984 priv->channel_info = kzalloc(sizeof(struct iwl_channel_info) *
985 priv->channel_count, GFP_KERNEL);
986 if (!priv->channel_info) {
987 IWL_ERR(priv, "Could not allocate channel_info\n");
988 priv->channel_count = 0;
992 ch_info = priv->channel_info;
994 /* Loop through the 5 EEPROM bands adding them in order to the
995 * channel map we maintain (that contains additional information than
996 * what just in the EEPROM) */
997 for (band = 1; band <= 5; band++) {
999 iwl_init_band_reference(priv, band, &eeprom_ch_count,
1000 &eeprom_ch_info, &eeprom_ch_index);
1002 /* Loop through each band adding each of the channels */
1003 for (ch = 0; ch < eeprom_ch_count; ch++) {
1004 ch_info->channel = eeprom_ch_index[ch];
1005 ch_info->band = (band == 1) ? IEEE80211_BAND_2GHZ :
1006 IEEE80211_BAND_5GHZ;
1008 /* permanently store EEPROM's channel regulatory flags
1009 * and max power in channel info database. */
1010 ch_info->eeprom = eeprom_ch_info[ch];
1012 /* Copy the run-time flags so they are there even on
1013 * invalid channels */
1014 ch_info->flags = eeprom_ch_info[ch].flags;
1015 /* First write that ht40 is not enabled, and then enable
1017 ch_info->ht40_extension_channel =
1018 IEEE80211_CHAN_NO_HT40;
1020 if (!(is_channel_valid(ch_info))) {
1021 IWL_DEBUG_INFO(priv, "Ch. %d Flags %x [%sGHz] - "
1025 is_channel_a_band(ch_info) ?
1031 /* Initialize regulatory-based run-time data */
1032 ch_info->max_power_avg = ch_info->curr_txpow =
1033 eeprom_ch_info[ch].max_power_avg;
1034 ch_info->scan_power = eeprom_ch_info[ch].max_power_avg;
1035 ch_info->min_power = 0;
1037 IWL_DEBUG_INFO(priv, "Ch. %d [%sGHz] %s%s%s%s%s%s(0x%02x %ddBm):"
1038 " Ad-Hoc %ssupported\n",
1040 is_channel_a_band(ch_info) ?
1042 CHECK_AND_PRINT_I(VALID),
1043 CHECK_AND_PRINT_I(IBSS),
1044 CHECK_AND_PRINT_I(ACTIVE),
1045 CHECK_AND_PRINT_I(RADAR),
1046 CHECK_AND_PRINT_I(WIDE),
1047 CHECK_AND_PRINT_I(DFS),
1048 eeprom_ch_info[ch].flags,
1049 eeprom_ch_info[ch].max_power_avg,
1050 ((eeprom_ch_info[ch].
1051 flags & EEPROM_CHANNEL_IBSS)
1052 && !(eeprom_ch_info[ch].
1053 flags & EEPROM_CHANNEL_RADAR))
1056 /* Set the tx_power_user_lmt to the highest power
1057 * supported by any channel */
1058 if (eeprom_ch_info[ch].max_power_avg >
1059 priv->tx_power_user_lmt)
1060 priv->tx_power_user_lmt =
1061 eeprom_ch_info[ch].max_power_avg;
1067 /* Check if we do have HT40 channels */
1068 if (priv->cfg->ops->lib->eeprom_ops.regulatory_bands[5] ==
1069 EEPROM_REGULATORY_BAND_NO_HT40 &&
1070 priv->cfg->ops->lib->eeprom_ops.regulatory_bands[6] ==
1071 EEPROM_REGULATORY_BAND_NO_HT40)
1074 /* Two additional EEPROM bands for 2.4 and 5 GHz HT40 channels */
1075 for (band = 6; band <= 7; band++) {
1076 enum ieee80211_band ieeeband;
1078 iwl_init_band_reference(priv, band, &eeprom_ch_count,
1079 &eeprom_ch_info, &eeprom_ch_index);
1081 /* EEPROM band 6 is 2.4, band 7 is 5 GHz */
1083 (band == 6) ? IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ;
1085 /* Loop through each band adding each of the channels */
1086 for (ch = 0; ch < eeprom_ch_count; ch++) {
1087 /* Set up driver's info for lower half */
1088 iwl_mod_ht40_chan_info(priv, ieeeband,
1089 eeprom_ch_index[ch],
1090 &eeprom_ch_info[ch],
1091 IEEE80211_CHAN_NO_HT40PLUS);
1093 /* Set up driver's info for upper half */
1094 iwl_mod_ht40_chan_info(priv, ieeeband,
1095 eeprom_ch_index[ch] + 4,
1096 &eeprom_ch_info[ch],
1097 IEEE80211_CHAN_NO_HT40MINUS);
1101 /* for newer device (6000 series and up)
1102 * EEPROM contain enhanced tx power information
1103 * driver need to process addition information
1104 * to determine the max channel tx power limits
1106 if (priv->cfg->ops->lib->eeprom_ops.update_enhanced_txpower)
1107 priv->cfg->ops->lib->eeprom_ops.update_enhanced_txpower(priv);
1111 EXPORT_SYMBOL(iwl_init_channel_map);
1114 * iwl_free_channel_map - undo allocations in iwl_init_channel_map
1116 void iwl_free_channel_map(struct iwl_priv *priv)
1118 kfree(priv->channel_info);
1119 priv->channel_count = 0;
1121 EXPORT_SYMBOL(iwl_free_channel_map);
1124 * iwl_get_channel_info - Find driver's private channel info
1126 * Based on band and channel number.
1128 const struct iwl_channel_info *iwl_get_channel_info(const struct iwl_priv *priv,
1129 enum ieee80211_band band, u16 channel)
1134 case IEEE80211_BAND_5GHZ:
1135 for (i = 14; i < priv->channel_count; i++) {
1136 if (priv->channel_info[i].channel == channel)
1137 return &priv->channel_info[i];
1140 case IEEE80211_BAND_2GHZ:
1141 if (channel >= 1 && channel <= 14)
1142 return &priv->channel_info[channel - 1];
1150 EXPORT_SYMBOL(iwl_get_channel_info);