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3be63ff0 WYG |
1 | /****************************************************************************** |
2 | * | |
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. | |
5 | * | |
6 | * GPL LICENSE SUMMARY | |
7 | * | |
8 | * Copyright(c) 2008 - 2010 Intel Corporation. All rights reserved. | |
9 | * | |
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. | |
13 | * | |
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. | |
18 | * | |
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 | |
23 | * | |
24 | * The full GNU General Public License is included in this distribution | |
25 | * in the file called LICENSE.GPL. | |
26 | * | |
27 | * Contact Information: | |
28 | * Intel Linux Wireless <ilw@linux.intel.com> | |
29 | * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 | |
30 | * | |
31 | * BSD LICENSE | |
32 | * | |
33 | * Copyright(c) 2005 - 2010 Intel Corporation. All rights reserved. | |
34 | * All rights reserved. | |
35 | * | |
36 | * Redistribution and use in source and binary forms, with or without | |
37 | * modification, are permitted provided that the following conditions | |
38 | * are met: | |
39 | * | |
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. | |
49 | * | |
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 | *****************************************************************************/ | |
62 | ||
63 | ||
64 | #include <linux/kernel.h> | |
65 | #include <linux/module.h> | |
66 | #include <linux/slab.h> | |
67 | #include <linux/init.h> | |
68 | ||
69 | #include <net/mac80211.h> | |
70 | ||
71 | #include "iwl-commands.h" | |
72 | #include "iwl-dev.h" | |
73 | #include "iwl-core.h" | |
74 | #include "iwl-debug.h" | |
75 | #include "iwl-agn.h" | |
76 | #include "iwl-io.h" | |
77 | ||
3be63ff0 WYG |
78 | /****************************************************************************** |
79 | * | |
80 | * EEPROM related functions | |
81 | * | |
82 | ******************************************************************************/ | |
83 | ||
84 | /* | |
85 | * The device's EEPROM semaphore prevents conflicts between driver and uCode | |
86 | * when accessing the EEPROM; each access is a series of pulses to/from the | |
87 | * EEPROM chip, not a single event, so even reads could conflict if they | |
88 | * weren't arbitrated by the semaphore. | |
89 | */ | |
90 | int iwlcore_eeprom_acquire_semaphore(struct iwl_priv *priv) | |
91 | { | |
92 | u16 count; | |
93 | int ret; | |
94 | ||
95 | for (count = 0; count < EEPROM_SEM_RETRY_LIMIT; count++) { | |
96 | /* Request semaphore */ | |
97 | iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG, | |
98 | CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM); | |
99 | ||
100 | /* See if we got it */ | |
101 | ret = iwl_poll_bit(priv, CSR_HW_IF_CONFIG_REG, | |
102 | CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM, | |
103 | CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM, | |
104 | EEPROM_SEM_TIMEOUT); | |
105 | if (ret >= 0) { | |
106 | IWL_DEBUG_IO(priv, | |
107 | "Acquired semaphore after %d tries.\n", | |
108 | count+1); | |
109 | return ret; | |
110 | } | |
111 | } | |
112 | ||
113 | return ret; | |
114 | } | |
115 | ||
116 | void iwlcore_eeprom_release_semaphore(struct iwl_priv *priv) | |
117 | { | |
118 | iwl_clear_bit(priv, CSR_HW_IF_CONFIG_REG, | |
119 | CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM); | |
120 | ||
121 | } | |
122 | ||
123 | int iwl_eeprom_check_version(struct iwl_priv *priv) | |
124 | { | |
125 | u16 eeprom_ver; | |
126 | u16 calib_ver; | |
127 | ||
128 | eeprom_ver = iwl_eeprom_query16(priv, EEPROM_VERSION); | |
129 | calib_ver = priv->cfg->ops->lib->eeprom_ops.calib_version(priv); | |
130 | ||
131 | if (eeprom_ver < priv->cfg->eeprom_ver || | |
132 | calib_ver < priv->cfg->eeprom_calib_ver) | |
133 | goto err; | |
134 | ||
135 | IWL_INFO(priv, "device EEPROM VER=0x%x, CALIB=0x%x\n", | |
136 | eeprom_ver, calib_ver); | |
137 | ||
138 | return 0; | |
139 | err: | |
140 | IWL_ERR(priv, "Unsupported (too old) EEPROM VER=0x%x < 0x%x " | |
141 | "CALIB=0x%x < 0x%x\n", | |
142 | eeprom_ver, priv->cfg->eeprom_ver, | |
143 | calib_ver, priv->cfg->eeprom_calib_ver); | |
144 | return -EINVAL; | |
145 | ||
146 | } | |
147 | ||
21a5b3c6 WYG |
148 | int iwl_eeprom_check_sku(struct iwl_priv *priv) |
149 | { | |
150 | u16 eeprom_sku; | |
dbbf1755 | 151 | u16 radio_cfg; |
21a5b3c6 WYG |
152 | |
153 | eeprom_sku = iwl_eeprom_query16(priv, EEPROM_SKU_CAP); | |
154 | ||
155 | priv->cfg->sku = ((eeprom_sku & EEPROM_SKU_CAP_BAND_SELECTION) >> | |
156 | EEPROM_SKU_CAP_BAND_POS); | |
157 | if (eeprom_sku & EEPROM_SKU_CAP_11N_ENABLE) | |
158 | priv->cfg->sku |= IWL_SKU_N; | |
159 | ||
160 | if (!priv->cfg->sku) { | |
161 | IWL_ERR(priv, "Invalid device sku\n"); | |
162 | return -EINVAL; | |
163 | } | |
164 | ||
165 | IWL_INFO(priv, "Device SKU: 0X%x\n", priv->cfg->sku); | |
166 | ||
dbbf1755 WYG |
167 | if (!priv->cfg->valid_tx_ant && !priv->cfg->valid_rx_ant) { |
168 | /* not using .cfg overwrite */ | |
169 | radio_cfg = iwl_eeprom_query16(priv, EEPROM_RADIO_CONFIG); | |
170 | priv->cfg->valid_tx_ant = EEPROM_RF_CFG_TX_ANT_MSK(radio_cfg); | |
171 | priv->cfg->valid_rx_ant = EEPROM_RF_CFG_TX_ANT_MSK(radio_cfg); | |
172 | if (!priv->cfg->valid_tx_ant || !priv->cfg->valid_rx_ant) { | |
173 | IWL_ERR(priv, "Invalid chain (0X%x, 0X%x)\n", | |
174 | priv->cfg->valid_tx_ant, | |
175 | priv->cfg->valid_rx_ant); | |
176 | return -EINVAL; | |
177 | } | |
178 | IWL_INFO(priv, "Valid Tx ant: 0X%x, Valid Rx ant: 0X%x\n", | |
179 | priv->cfg->valid_tx_ant, priv->cfg->valid_rx_ant); | |
180 | } | |
181 | /* | |
182 | * for some special cases, | |
183 | * EEPROM did not reflect the correct antenna setting | |
184 | * so overwrite the valid tx/rx antenna from .cfg | |
185 | */ | |
21a5b3c6 WYG |
186 | return 0; |
187 | } | |
188 | ||
3be63ff0 WYG |
189 | void iwl_eeprom_get_mac(const struct iwl_priv *priv, u8 *mac) |
190 | { | |
191 | const u8 *addr = priv->cfg->ops->lib->eeprom_ops.query_addr(priv, | |
192 | EEPROM_MAC_ADDRESS); | |
193 | memcpy(mac, addr, ETH_ALEN); | |
194 | } | |
195 | ||
196 | /** | |
197 | * iwl_get_max_txpower_avg - get the highest tx power from all chains. | |
198 | * find the highest tx power from all chains for the channel | |
199 | */ | |
200 | static s8 iwl_get_max_txpower_avg(struct iwl_priv *priv, | |
201 | struct iwl_eeprom_enhanced_txpwr *enhanced_txpower, | |
202 | int element, s8 *max_txpower_in_half_dbm) | |
203 | { | |
204 | s8 max_txpower_avg = 0; /* (dBm) */ | |
205 | ||
3be63ff0 WYG |
206 | /* Take the highest tx power from any valid chains */ |
207 | if ((priv->cfg->valid_tx_ant & ANT_A) && | |
208 | (enhanced_txpower[element].chain_a_max > max_txpower_avg)) | |
209 | max_txpower_avg = enhanced_txpower[element].chain_a_max; | |
210 | if ((priv->cfg->valid_tx_ant & ANT_B) && | |
211 | (enhanced_txpower[element].chain_b_max > max_txpower_avg)) | |
212 | max_txpower_avg = enhanced_txpower[element].chain_b_max; | |
213 | if ((priv->cfg->valid_tx_ant & ANT_C) && | |
214 | (enhanced_txpower[element].chain_c_max > max_txpower_avg)) | |
215 | max_txpower_avg = enhanced_txpower[element].chain_c_max; | |
216 | if (((priv->cfg->valid_tx_ant == ANT_AB) | | |
217 | (priv->cfg->valid_tx_ant == ANT_BC) | | |
218 | (priv->cfg->valid_tx_ant == ANT_AC)) && | |
219 | (enhanced_txpower[element].mimo2_max > max_txpower_avg)) | |
220 | max_txpower_avg = enhanced_txpower[element].mimo2_max; | |
221 | if ((priv->cfg->valid_tx_ant == ANT_ABC) && | |
222 | (enhanced_txpower[element].mimo3_max > max_txpower_avg)) | |
223 | max_txpower_avg = enhanced_txpower[element].mimo3_max; | |
224 | ||
225 | /* | |
226 | * max. tx power in EEPROM is in 1/2 dBm format | |
227 | * convert from 1/2 dBm to dBm (round-up convert) | |
228 | * but we also do not want to loss 1/2 dBm resolution which | |
229 | * will impact performance | |
230 | */ | |
231 | *max_txpower_in_half_dbm = max_txpower_avg; | |
232 | return (max_txpower_avg & 0x01) + (max_txpower_avg >> 1); | |
233 | } | |
234 | ||
8d6748ca JB |
235 | static void |
236 | iwlcore_eeprom_enh_txp_read_element(struct iwl_priv *priv, | |
237 | struct iwl_eeprom_enhanced_txpwr *txp, | |
238 | s8 max_txpower_avg) | |
239 | { | |
240 | int ch_idx; | |
241 | bool is_ht40 = txp->flags & IWL_EEPROM_ENH_TXP_FL_40MHZ; | |
242 | enum ieee80211_band band; | |
243 | ||
244 | band = txp->flags & IWL_EEPROM_ENH_TXP_FL_BAND_52G ? | |
245 | IEEE80211_BAND_5GHZ : IEEE80211_BAND_2GHZ; | |
246 | ||
247 | for (ch_idx = 0; ch_idx < priv->channel_count; ch_idx++) { | |
248 | struct iwl_channel_info *ch_info = &priv->channel_info[ch_idx]; | |
249 | ||
250 | /* update matching channel or from common data only */ | |
251 | if (txp->channel != 0 && ch_info->channel != txp->channel) | |
252 | continue; | |
253 | ||
254 | /* update matching band only */ | |
255 | if (band != ch_info->band) | |
256 | continue; | |
257 | ||
258 | if (ch_info->max_power_avg < max_txpower_avg && !is_ht40) { | |
259 | ch_info->max_power_avg = max_txpower_avg; | |
260 | ch_info->curr_txpow = max_txpower_avg; | |
261 | ch_info->scan_power = max_txpower_avg; | |
262 | } | |
263 | ||
264 | if (is_ht40 && ch_info->ht40_max_power_avg < max_txpower_avg) | |
265 | ch_info->ht40_max_power_avg = max_txpower_avg; | |
266 | } | |
267 | } | |
268 | ||
269 | #define EEPROM_TXP_OFFS (0x00 | INDIRECT_ADDRESS | INDIRECT_TXP_LIMIT) | |
270 | #define EEPROM_TXP_ENTRY_LEN sizeof(struct iwl_eeprom_enhanced_txpwr) | |
271 | #define EEPROM_TXP_SZ_OFFS (0x00 | INDIRECT_ADDRESS | INDIRECT_TXP_LIMIT_SIZE) | |
272 | ||
33c68770 WYG |
273 | #define TXP_CHECK_AND_PRINT(x) ((txp->flags & IWL_EEPROM_ENH_TXP_FL_##x) \ |
274 | ? # x " " : "") | |
275 | ||
c6fc1087 | 276 | void iwlcore_eeprom_enhanced_txpower(struct iwl_priv *priv) |
8d6748ca JB |
277 | { |
278 | struct iwl_eeprom_enhanced_txpwr *txp_array, *txp; | |
279 | int idx, entries; | |
280 | __le16 *txp_len; | |
281 | s8 max_txp_avg, max_txp_avg_halfdbm; | |
282 | ||
283 | BUILD_BUG_ON(sizeof(struct iwl_eeprom_enhanced_txpwr) != 8); | |
284 | ||
285 | /* the length is in 16-bit words, but we want entries */ | |
286 | txp_len = (__le16 *) iwlagn_eeprom_query_addr(priv, EEPROM_TXP_SZ_OFFS); | |
287 | entries = le16_to_cpup(txp_len) * 2 / EEPROM_TXP_ENTRY_LEN; | |
288 | ||
289 | txp_array = (void *) iwlagn_eeprom_query_addr(priv, EEPROM_TXP_OFFS); | |
33c68770 | 290 | |
8d6748ca JB |
291 | for (idx = 0; idx < entries; idx++) { |
292 | txp = &txp_array[idx]; | |
8d6748ca JB |
293 | /* skip invalid entries */ |
294 | if (!(txp->flags & IWL_EEPROM_ENH_TXP_FL_VALID)) | |
295 | continue; | |
296 | ||
33c68770 WYG |
297 | IWL_DEBUG_EEPROM(priv, "%s %d:\t %s%s%s%s%s%s%s%s (0x%02x)\n", |
298 | (txp->channel && (txp->flags & | |
299 | IWL_EEPROM_ENH_TXP_FL_COMMON_TYPE)) ? | |
300 | "Common " : (txp->channel) ? | |
301 | "Channel" : "Common", | |
302 | (txp->channel), | |
303 | TXP_CHECK_AND_PRINT(VALID), | |
304 | TXP_CHECK_AND_PRINT(BAND_52G), | |
305 | TXP_CHECK_AND_PRINT(OFDM), | |
306 | TXP_CHECK_AND_PRINT(40MHZ), | |
307 | TXP_CHECK_AND_PRINT(HT_AP), | |
308 | TXP_CHECK_AND_PRINT(RES1), | |
309 | TXP_CHECK_AND_PRINT(RES2), | |
310 | TXP_CHECK_AND_PRINT(COMMON_TYPE), | |
311 | txp->flags); | |
312 | IWL_DEBUG_EEPROM(priv, "\t\t chain_A: 0x%02x " | |
313 | "chain_B: 0X%02x chain_C: 0X%02x\n", | |
314 | txp->chain_a_max, txp->chain_b_max, | |
315 | txp->chain_c_max); | |
316 | IWL_DEBUG_EEPROM(priv, "\t\t MIMO2: 0x%02x " | |
317 | "MIMO3: 0x%02x High 20_on_40: 0x%02x " | |
318 | "Low 20_on_40: 0x%02x\n", | |
319 | txp->mimo2_max, txp->mimo3_max, | |
320 | ((txp->delta_20_in_40 & 0xf0) >> 4), | |
321 | (txp->delta_20_in_40 & 0x0f)); | |
322 | ||
8d6748ca JB |
323 | max_txp_avg = iwl_get_max_txpower_avg(priv, txp_array, idx, |
324 | &max_txp_avg_halfdbm); | |
325 | ||
326 | /* | |
327 | * Update the user limit values values to the highest | |
328 | * power supported by any channel | |
329 | */ | |
330 | if (max_txp_avg > priv->tx_power_user_lmt) | |
331 | priv->tx_power_user_lmt = max_txp_avg; | |
332 | if (max_txp_avg_halfdbm > priv->tx_power_lmt_in_half_dbm) | |
333 | priv->tx_power_lmt_in_half_dbm = max_txp_avg_halfdbm; | |
334 | ||
335 | iwlcore_eeprom_enh_txp_read_element(priv, txp, max_txp_avg); | |
336 | } | |
337 | } |