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be663ab6 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 - 2011 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 - 2011 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 | #include <linux/slab.h> | |
64 | #include <net/mac80211.h> | |
65 | ||
98613be0 | 66 | #include "common.h" |
af038f40 | 67 | #include "4965.h" |
be663ab6 WYG |
68 | |
69 | /***************************************************************************** | |
70 | * INIT calibrations framework | |
71 | *****************************************************************************/ | |
72 | ||
ebf0d90d | 73 | struct stats_general_data { |
be663ab6 WYG |
74 | u32 beacon_silence_rssi_a; |
75 | u32 beacon_silence_rssi_b; | |
76 | u32 beacon_silence_rssi_c; | |
77 | u32 beacon_energy_a; | |
78 | u32 beacon_energy_b; | |
79 | u32 beacon_energy_c; | |
80 | }; | |
81 | ||
be663ab6 WYG |
82 | /***************************************************************************** |
83 | * RUNTIME calibrations framework | |
84 | *****************************************************************************/ | |
85 | ||
86 | /* "false alarms" are signals that our DSP tries to lock onto, | |
87 | * but then determines that they are either noise, or transmissions | |
88 | * from a distant wireless network (also "noise", really) that get | |
89 | * "stepped on" by stronger transmissions within our own network. | |
90 | * This algorithm attempts to set a sensitivity level that is high | |
91 | * enough to receive all of our own network traffic, but not so | |
92 | * high that our DSP gets too busy trying to lock onto non-network | |
93 | * activity/noise. */ | |
e7392364 SG |
94 | static int |
95 | il4965_sens_energy_cck(struct il_priv *il, u32 norm_fa, u32 rx_enable_time, | |
96 | struct stats_general_data *rx_info) | |
be663ab6 WYG |
97 | { |
98 | u32 max_nrg_cck = 0; | |
99 | int i = 0; | |
100 | u8 max_silence_rssi = 0; | |
101 | u32 silence_ref = 0; | |
102 | u8 silence_rssi_a = 0; | |
103 | u8 silence_rssi_b = 0; | |
104 | u8 silence_rssi_c = 0; | |
105 | u32 val; | |
106 | ||
107 | /* "false_alarms" values below are cross-multiplications to assess the | |
108 | * numbers of false alarms within the measured period of actual Rx | |
109 | * (Rx is off when we're txing), vs the min/max expected false alarms | |
110 | * (some should be expected if rx is sensitive enough) in a | |
111 | * hypothetical listening period of 200 time units (TU), 204.8 msec: | |
112 | * | |
113 | * MIN_FA/fixed-time < false_alarms/actual-rx-time < MAX_FA/beacon-time | |
114 | * | |
115 | * */ | |
116 | u32 false_alarms = norm_fa * 200 * 1024; | |
117 | u32 max_false_alarms = MAX_FA_CCK * rx_enable_time; | |
118 | u32 min_false_alarms = MIN_FA_CCK * rx_enable_time; | |
e2ebc833 | 119 | struct il_sensitivity_data *data = NULL; |
46bc8d4b | 120 | const struct il_sensitivity_ranges *ranges = il->hw_params.sens; |
be663ab6 | 121 | |
46bc8d4b | 122 | data = &(il->sensitivity_data); |
be663ab6 WYG |
123 | |
124 | data->nrg_auto_corr_silence_diff = 0; | |
125 | ||
126 | /* Find max silence rssi among all 3 receivers. | |
127 | * This is background noise, which may include transmissions from other | |
128 | * networks, measured during silence before our network's beacon */ | |
e7392364 SG |
129 | silence_rssi_a = |
130 | (u8) ((rx_info->beacon_silence_rssi_a & ALL_BAND_FILTER) >> 8); | |
131 | silence_rssi_b = | |
132 | (u8) ((rx_info->beacon_silence_rssi_b & ALL_BAND_FILTER) >> 8); | |
133 | silence_rssi_c = | |
134 | (u8) ((rx_info->beacon_silence_rssi_c & ALL_BAND_FILTER) >> 8); | |
be663ab6 WYG |
135 | |
136 | val = max(silence_rssi_b, silence_rssi_c); | |
137 | max_silence_rssi = max(silence_rssi_a, (u8) val); | |
138 | ||
139 | /* Store silence rssi in 20-beacon history table */ | |
140 | data->nrg_silence_rssi[data->nrg_silence_idx] = max_silence_rssi; | |
141 | data->nrg_silence_idx++; | |
142 | if (data->nrg_silence_idx >= NRG_NUM_PREV_STAT_L) | |
143 | data->nrg_silence_idx = 0; | |
144 | ||
145 | /* Find max silence rssi across 20 beacon history */ | |
146 | for (i = 0; i < NRG_NUM_PREV_STAT_L; i++) { | |
147 | val = data->nrg_silence_rssi[i]; | |
148 | silence_ref = max(silence_ref, val); | |
149 | } | |
e7392364 SG |
150 | D_CALIB("silence a %u, b %u, c %u, 20-bcn max %u\n", silence_rssi_a, |
151 | silence_rssi_b, silence_rssi_c, silence_ref); | |
be663ab6 WYG |
152 | |
153 | /* Find max rx energy (min value!) among all 3 receivers, | |
154 | * measured during beacon frame. | |
155 | * Save it in 10-beacon history table. */ | |
156 | i = data->nrg_energy_idx; | |
157 | val = min(rx_info->beacon_energy_b, rx_info->beacon_energy_c); | |
158 | data->nrg_value[i] = min(rx_info->beacon_energy_a, val); | |
159 | ||
160 | data->nrg_energy_idx++; | |
161 | if (data->nrg_energy_idx >= 10) | |
162 | data->nrg_energy_idx = 0; | |
163 | ||
164 | /* Find min rx energy (max value) across 10 beacon history. | |
165 | * This is the minimum signal level that we want to receive well. | |
166 | * Add backoff (margin so we don't miss slightly lower energy frames). | |
167 | * This establishes an upper bound (min value) for energy threshold. */ | |
168 | max_nrg_cck = data->nrg_value[0]; | |
169 | for (i = 1; i < 10; i++) | |
170 | max_nrg_cck = (u32) max(max_nrg_cck, (data->nrg_value[i])); | |
171 | max_nrg_cck += 6; | |
172 | ||
58de00a4 | 173 | D_CALIB("rx energy a %u, b %u, c %u, 10-bcn max/min %u\n", |
e7392364 SG |
174 | rx_info->beacon_energy_a, rx_info->beacon_energy_b, |
175 | rx_info->beacon_energy_c, max_nrg_cck - 6); | |
be663ab6 WYG |
176 | |
177 | /* Count number of consecutive beacons with fewer-than-desired | |
178 | * false alarms. */ | |
179 | if (false_alarms < min_false_alarms) | |
180 | data->num_in_cck_no_fa++; | |
181 | else | |
182 | data->num_in_cck_no_fa = 0; | |
58de00a4 | 183 | D_CALIB("consecutive bcns with few false alarms = %u\n", |
e7392364 | 184 | data->num_in_cck_no_fa); |
be663ab6 WYG |
185 | |
186 | /* If we got too many false alarms this time, reduce sensitivity */ | |
232913b5 SG |
187 | if (false_alarms > max_false_alarms && |
188 | data->auto_corr_cck > AUTO_CORR_MAX_TH_CCK) { | |
e7392364 SG |
189 | D_CALIB("norm FA %u > max FA %u\n", false_alarms, |
190 | max_false_alarms); | |
58de00a4 | 191 | D_CALIB("... reducing sensitivity\n"); |
e2ebc833 | 192 | data->nrg_curr_state = IL_FA_TOO_MANY; |
be663ab6 WYG |
193 | /* Store for "fewer than desired" on later beacon */ |
194 | data->nrg_silence_ref = silence_ref; | |
195 | ||
196 | /* increase energy threshold (reduce nrg value) | |
197 | * to decrease sensitivity */ | |
198 | data->nrg_th_cck = data->nrg_th_cck - NRG_STEP_CCK; | |
e7392364 | 199 | /* Else if we got fewer than desired, increase sensitivity */ |
be663ab6 | 200 | } else if (false_alarms < min_false_alarms) { |
e2ebc833 | 201 | data->nrg_curr_state = IL_FA_TOO_FEW; |
be663ab6 WYG |
202 | |
203 | /* Compare silence level with silence level for most recent | |
204 | * healthy number or too many false alarms */ | |
e7392364 SG |
205 | data->nrg_auto_corr_silence_diff = |
206 | (s32) data->nrg_silence_ref - (s32) silence_ref; | |
be663ab6 | 207 | |
e7392364 SG |
208 | D_CALIB("norm FA %u < min FA %u, silence diff %d\n", |
209 | false_alarms, min_false_alarms, | |
210 | data->nrg_auto_corr_silence_diff); | |
be663ab6 WYG |
211 | |
212 | /* Increase value to increase sensitivity, but only if: | |
213 | * 1a) previous beacon did *not* have *too many* false alarms | |
214 | * 1b) AND there's a significant difference in Rx levels | |
215 | * from a previous beacon with too many, or healthy # FAs | |
216 | * OR 2) We've seen a lot of beacons (100) with too few | |
217 | * false alarms */ | |
232913b5 SG |
218 | if (data->nrg_prev_state != IL_FA_TOO_MANY && |
219 | (data->nrg_auto_corr_silence_diff > NRG_DIFF || | |
220 | data->num_in_cck_no_fa > MAX_NUMBER_CCK_NO_FA)) { | |
be663ab6 | 221 | |
58de00a4 | 222 | D_CALIB("... increasing sensitivity\n"); |
be663ab6 WYG |
223 | /* Increase nrg value to increase sensitivity */ |
224 | val = data->nrg_th_cck + NRG_STEP_CCK; | |
e7392364 | 225 | data->nrg_th_cck = min((u32) ranges->min_nrg_cck, val); |
be663ab6 | 226 | } else { |
e7392364 | 227 | D_CALIB("... but not changing sensitivity\n"); |
be663ab6 WYG |
228 | } |
229 | ||
e7392364 | 230 | /* Else we got a healthy number of false alarms, keep status quo */ |
be663ab6 | 231 | } else { |
58de00a4 | 232 | D_CALIB(" FA in safe zone\n"); |
e2ebc833 | 233 | data->nrg_curr_state = IL_FA_GOOD_RANGE; |
be663ab6 WYG |
234 | |
235 | /* Store for use in "fewer than desired" with later beacon */ | |
236 | data->nrg_silence_ref = silence_ref; | |
237 | ||
238 | /* If previous beacon had too many false alarms, | |
239 | * give it some extra margin by reducing sensitivity again | |
240 | * (but don't go below measured energy of desired Rx) */ | |
e2ebc833 | 241 | if (IL_FA_TOO_MANY == data->nrg_prev_state) { |
58de00a4 | 242 | D_CALIB("... increasing margin\n"); |
be663ab6 WYG |
243 | if (data->nrg_th_cck > (max_nrg_cck + NRG_MARGIN)) |
244 | data->nrg_th_cck -= NRG_MARGIN; | |
245 | else | |
246 | data->nrg_th_cck = max_nrg_cck; | |
247 | } | |
248 | } | |
249 | ||
250 | /* Make sure the energy threshold does not go above the measured | |
251 | * energy of the desired Rx signals (reduced by backoff margin), | |
252 | * or else we might start missing Rx frames. | |
253 | * Lower value is higher energy, so we use max()! | |
254 | */ | |
255 | data->nrg_th_cck = max(max_nrg_cck, data->nrg_th_cck); | |
58de00a4 | 256 | D_CALIB("new nrg_th_cck %u\n", data->nrg_th_cck); |
be663ab6 WYG |
257 | |
258 | data->nrg_prev_state = data->nrg_curr_state; | |
259 | ||
260 | /* Auto-correlation CCK algorithm */ | |
261 | if (false_alarms > min_false_alarms) { | |
262 | ||
263 | /* increase auto_corr values to decrease sensitivity | |
264 | * so the DSP won't be disturbed by the noise | |
265 | */ | |
266 | if (data->auto_corr_cck < AUTO_CORR_MAX_TH_CCK) | |
267 | data->auto_corr_cck = AUTO_CORR_MAX_TH_CCK + 1; | |
268 | else { | |
269 | val = data->auto_corr_cck + AUTO_CORR_STEP_CCK; | |
270 | data->auto_corr_cck = | |
e7392364 | 271 | min((u32) ranges->auto_corr_max_cck, val); |
be663ab6 WYG |
272 | } |
273 | val = data->auto_corr_cck_mrc + AUTO_CORR_STEP_CCK; | |
274 | data->auto_corr_cck_mrc = | |
e7392364 | 275 | min((u32) ranges->auto_corr_max_cck_mrc, val); |
232913b5 SG |
276 | } else if (false_alarms < min_false_alarms && |
277 | (data->nrg_auto_corr_silence_diff > NRG_DIFF || | |
278 | data->num_in_cck_no_fa > MAX_NUMBER_CCK_NO_FA)) { | |
be663ab6 WYG |
279 | |
280 | /* Decrease auto_corr values to increase sensitivity */ | |
281 | val = data->auto_corr_cck - AUTO_CORR_STEP_CCK; | |
e7392364 | 282 | data->auto_corr_cck = max((u32) ranges->auto_corr_min_cck, val); |
be663ab6 WYG |
283 | val = data->auto_corr_cck_mrc - AUTO_CORR_STEP_CCK; |
284 | data->auto_corr_cck_mrc = | |
e7392364 | 285 | max((u32) ranges->auto_corr_min_cck_mrc, val); |
be663ab6 WYG |
286 | } |
287 | ||
288 | return 0; | |
289 | } | |
290 | ||
e7392364 SG |
291 | static int |
292 | il4965_sens_auto_corr_ofdm(struct il_priv *il, u32 norm_fa, u32 rx_enable_time) | |
be663ab6 WYG |
293 | { |
294 | u32 val; | |
295 | u32 false_alarms = norm_fa * 200 * 1024; | |
296 | u32 max_false_alarms = MAX_FA_OFDM * rx_enable_time; | |
297 | u32 min_false_alarms = MIN_FA_OFDM * rx_enable_time; | |
e2ebc833 | 298 | struct il_sensitivity_data *data = NULL; |
46bc8d4b | 299 | const struct il_sensitivity_ranges *ranges = il->hw_params.sens; |
be663ab6 | 300 | |
46bc8d4b | 301 | data = &(il->sensitivity_data); |
be663ab6 WYG |
302 | |
303 | /* If we got too many false alarms this time, reduce sensitivity */ | |
304 | if (false_alarms > max_false_alarms) { | |
305 | ||
e7392364 SG |
306 | D_CALIB("norm FA %u > max FA %u)\n", false_alarms, |
307 | max_false_alarms); | |
be663ab6 WYG |
308 | |
309 | val = data->auto_corr_ofdm + AUTO_CORR_STEP_OFDM; | |
310 | data->auto_corr_ofdm = | |
e7392364 | 311 | min((u32) ranges->auto_corr_max_ofdm, val); |
be663ab6 WYG |
312 | |
313 | val = data->auto_corr_ofdm_mrc + AUTO_CORR_STEP_OFDM; | |
314 | data->auto_corr_ofdm_mrc = | |
e7392364 | 315 | min((u32) ranges->auto_corr_max_ofdm_mrc, val); |
be663ab6 WYG |
316 | |
317 | val = data->auto_corr_ofdm_x1 + AUTO_CORR_STEP_OFDM; | |
318 | data->auto_corr_ofdm_x1 = | |
e7392364 | 319 | min((u32) ranges->auto_corr_max_ofdm_x1, val); |
be663ab6 WYG |
320 | |
321 | val = data->auto_corr_ofdm_mrc_x1 + AUTO_CORR_STEP_OFDM; | |
322 | data->auto_corr_ofdm_mrc_x1 = | |
e7392364 | 323 | min((u32) ranges->auto_corr_max_ofdm_mrc_x1, val); |
be663ab6 WYG |
324 | } |
325 | ||
326 | /* Else if we got fewer than desired, increase sensitivity */ | |
327 | else if (false_alarms < min_false_alarms) { | |
328 | ||
e7392364 SG |
329 | D_CALIB("norm FA %u < min FA %u\n", false_alarms, |
330 | min_false_alarms); | |
be663ab6 WYG |
331 | |
332 | val = data->auto_corr_ofdm - AUTO_CORR_STEP_OFDM; | |
333 | data->auto_corr_ofdm = | |
e7392364 | 334 | max((u32) ranges->auto_corr_min_ofdm, val); |
be663ab6 WYG |
335 | |
336 | val = data->auto_corr_ofdm_mrc - AUTO_CORR_STEP_OFDM; | |
337 | data->auto_corr_ofdm_mrc = | |
e7392364 | 338 | max((u32) ranges->auto_corr_min_ofdm_mrc, val); |
be663ab6 WYG |
339 | |
340 | val = data->auto_corr_ofdm_x1 - AUTO_CORR_STEP_OFDM; | |
341 | data->auto_corr_ofdm_x1 = | |
e7392364 | 342 | max((u32) ranges->auto_corr_min_ofdm_x1, val); |
be663ab6 WYG |
343 | |
344 | val = data->auto_corr_ofdm_mrc_x1 - AUTO_CORR_STEP_OFDM; | |
345 | data->auto_corr_ofdm_mrc_x1 = | |
e7392364 | 346 | max((u32) ranges->auto_corr_min_ofdm_mrc_x1, val); |
be663ab6 | 347 | } else { |
58de00a4 | 348 | D_CALIB("min FA %u < norm FA %u < max FA %u OK\n", |
e7392364 | 349 | min_false_alarms, false_alarms, max_false_alarms); |
be663ab6 WYG |
350 | } |
351 | return 0; | |
352 | } | |
353 | ||
e7392364 SG |
354 | static void |
355 | il4965_prepare_legacy_sensitivity_tbl(struct il_priv *il, | |
356 | struct il_sensitivity_data *data, | |
1722f8e1 | 357 | __le16 *tbl) |
be663ab6 | 358 | { |
2d09b062 | 359 | tbl[HD_AUTO_CORR32_X4_TH_ADD_MIN_IDX] = |
e7392364 | 360 | cpu_to_le16((u16) data->auto_corr_ofdm); |
2d09b062 | 361 | tbl[HD_AUTO_CORR32_X4_TH_ADD_MIN_MRC_IDX] = |
e7392364 | 362 | cpu_to_le16((u16) data->auto_corr_ofdm_mrc); |
2d09b062 | 363 | tbl[HD_AUTO_CORR32_X1_TH_ADD_MIN_IDX] = |
e7392364 | 364 | cpu_to_le16((u16) data->auto_corr_ofdm_x1); |
2d09b062 | 365 | tbl[HD_AUTO_CORR32_X1_TH_ADD_MIN_MRC_IDX] = |
e7392364 | 366 | cpu_to_le16((u16) data->auto_corr_ofdm_mrc_x1); |
be663ab6 | 367 | |
2d09b062 | 368 | tbl[HD_AUTO_CORR40_X4_TH_ADD_MIN_IDX] = |
e7392364 | 369 | cpu_to_le16((u16) data->auto_corr_cck); |
2d09b062 | 370 | tbl[HD_AUTO_CORR40_X4_TH_ADD_MIN_MRC_IDX] = |
e7392364 | 371 | cpu_to_le16((u16) data->auto_corr_cck_mrc); |
be663ab6 | 372 | |
e7392364 SG |
373 | tbl[HD_MIN_ENERGY_CCK_DET_IDX] = cpu_to_le16((u16) data->nrg_th_cck); |
374 | tbl[HD_MIN_ENERGY_OFDM_DET_IDX] = cpu_to_le16((u16) data->nrg_th_ofdm); | |
be663ab6 | 375 | |
2d09b062 | 376 | tbl[HD_BARKER_CORR_TH_ADD_MIN_IDX] = |
e7392364 | 377 | cpu_to_le16(data->barker_corr_th_min); |
2d09b062 | 378 | tbl[HD_BARKER_CORR_TH_ADD_MIN_MRC_IDX] = |
e7392364 SG |
379 | cpu_to_le16(data->barker_corr_th_min_mrc); |
380 | tbl[HD_OFDM_ENERGY_TH_IN_IDX] = cpu_to_le16(data->nrg_th_cca); | |
be663ab6 | 381 | |
58de00a4 | 382 | D_CALIB("ofdm: ac %u mrc %u x1 %u mrc_x1 %u thresh %u\n", |
e7392364 SG |
383 | data->auto_corr_ofdm, data->auto_corr_ofdm_mrc, |
384 | data->auto_corr_ofdm_x1, data->auto_corr_ofdm_mrc_x1, | |
385 | data->nrg_th_ofdm); | |
be663ab6 | 386 | |
e7392364 SG |
387 | D_CALIB("cck: ac %u mrc %u thresh %u\n", data->auto_corr_cck, |
388 | data->auto_corr_cck_mrc, data->nrg_th_cck); | |
be663ab6 WYG |
389 | } |
390 | ||
4d69c752 | 391 | /* Prepare a C_SENSITIVITY, send to uCode if values have changed */ |
e7392364 SG |
392 | static int |
393 | il4965_sensitivity_write(struct il_priv *il) | |
be663ab6 | 394 | { |
e2ebc833 SG |
395 | struct il_sensitivity_cmd cmd; |
396 | struct il_sensitivity_data *data = NULL; | |
397 | struct il_host_cmd cmd_out = { | |
4d69c752 | 398 | .id = C_SENSITIVITY, |
e2ebc833 | 399 | .len = sizeof(struct il_sensitivity_cmd), |
be663ab6 WYG |
400 | .flags = CMD_ASYNC, |
401 | .data = &cmd, | |
402 | }; | |
403 | ||
46bc8d4b | 404 | data = &(il->sensitivity_data); |
be663ab6 WYG |
405 | |
406 | memset(&cmd, 0, sizeof(cmd)); | |
407 | ||
46bc8d4b | 408 | il4965_prepare_legacy_sensitivity_tbl(il, data, &cmd.table[0]); |
be663ab6 WYG |
409 | |
410 | /* Update uCode's "work" table, and copy it to DSP */ | |
4d69c752 | 411 | cmd.control = C_SENSITIVITY_CONTROL_WORK_TBL; |
be663ab6 WYG |
412 | |
413 | /* Don't send command to uCode if nothing has changed */ | |
e7392364 SG |
414 | if (!memcmp |
415 | (&cmd.table[0], &(il->sensitivity_tbl[0]), | |
416 | sizeof(u16) * HD_TBL_SIZE)) { | |
4d69c752 | 417 | D_CALIB("No change in C_SENSITIVITY\n"); |
be663ab6 WYG |
418 | return 0; |
419 | } | |
420 | ||
421 | /* Copy table for comparison next time */ | |
46bc8d4b | 422 | memcpy(&(il->sensitivity_tbl[0]), &(cmd.table[0]), |
e7392364 | 423 | sizeof(u16) * HD_TBL_SIZE); |
be663ab6 | 424 | |
46bc8d4b | 425 | return il_send_cmd(il, &cmd_out); |
be663ab6 WYG |
426 | } |
427 | ||
e7392364 SG |
428 | void |
429 | il4965_init_sensitivity(struct il_priv *il) | |
be663ab6 WYG |
430 | { |
431 | int ret = 0; | |
432 | int i; | |
e2ebc833 | 433 | struct il_sensitivity_data *data = NULL; |
46bc8d4b | 434 | const struct il_sensitivity_ranges *ranges = il->hw_params.sens; |
be663ab6 | 435 | |
46bc8d4b | 436 | if (il->disable_sens_cal) |
be663ab6 WYG |
437 | return; |
438 | ||
58de00a4 | 439 | D_CALIB("Start il4965_init_sensitivity\n"); |
be663ab6 WYG |
440 | |
441 | /* Clear driver's sensitivity algo data */ | |
46bc8d4b | 442 | data = &(il->sensitivity_data); |
be663ab6 WYG |
443 | |
444 | if (ranges == NULL) | |
445 | return; | |
446 | ||
e2ebc833 | 447 | memset(data, 0, sizeof(struct il_sensitivity_data)); |
be663ab6 WYG |
448 | |
449 | data->num_in_cck_no_fa = 0; | |
e2ebc833 SG |
450 | data->nrg_curr_state = IL_FA_TOO_MANY; |
451 | data->nrg_prev_state = IL_FA_TOO_MANY; | |
be663ab6 WYG |
452 | data->nrg_silence_ref = 0; |
453 | data->nrg_silence_idx = 0; | |
454 | data->nrg_energy_idx = 0; | |
455 | ||
456 | for (i = 0; i < 10; i++) | |
457 | data->nrg_value[i] = 0; | |
458 | ||
459 | for (i = 0; i < NRG_NUM_PREV_STAT_L; i++) | |
460 | data->nrg_silence_rssi[i] = 0; | |
461 | ||
e7392364 | 462 | data->auto_corr_ofdm = ranges->auto_corr_min_ofdm; |
be663ab6 | 463 | data->auto_corr_ofdm_mrc = ranges->auto_corr_min_ofdm_mrc; |
e7392364 | 464 | data->auto_corr_ofdm_x1 = ranges->auto_corr_min_ofdm_x1; |
be663ab6 WYG |
465 | data->auto_corr_ofdm_mrc_x1 = ranges->auto_corr_min_ofdm_mrc_x1; |
466 | data->auto_corr_cck = AUTO_CORR_CCK_MIN_VAL_DEF; | |
467 | data->auto_corr_cck_mrc = ranges->auto_corr_min_cck_mrc; | |
468 | data->nrg_th_cck = ranges->nrg_th_cck; | |
469 | data->nrg_th_ofdm = ranges->nrg_th_ofdm; | |
470 | data->barker_corr_th_min = ranges->barker_corr_th_min; | |
471 | data->barker_corr_th_min_mrc = ranges->barker_corr_th_min_mrc; | |
472 | data->nrg_th_cca = ranges->nrg_th_cca; | |
473 | ||
474 | data->last_bad_plcp_cnt_ofdm = 0; | |
475 | data->last_fa_cnt_ofdm = 0; | |
476 | data->last_bad_plcp_cnt_cck = 0; | |
477 | data->last_fa_cnt_cck = 0; | |
478 | ||
46bc8d4b | 479 | ret |= il4965_sensitivity_write(il); |
58de00a4 | 480 | D_CALIB("<<return 0x%X\n", ret); |
be663ab6 WYG |
481 | } |
482 | ||
e7392364 SG |
483 | void |
484 | il4965_sensitivity_calibration(struct il_priv *il, void *resp) | |
be663ab6 WYG |
485 | { |
486 | u32 rx_enable_time; | |
487 | u32 fa_cck; | |
488 | u32 fa_ofdm; | |
489 | u32 bad_plcp_cck; | |
490 | u32 bad_plcp_ofdm; | |
491 | u32 norm_fa_ofdm; | |
492 | u32 norm_fa_cck; | |
e2ebc833 | 493 | struct il_sensitivity_data *data = NULL; |
ebf0d90d SG |
494 | struct stats_rx_non_phy *rx_info; |
495 | struct stats_rx_phy *ofdm, *cck; | |
be663ab6 | 496 | unsigned long flags; |
ebf0d90d | 497 | struct stats_general_data statis; |
be663ab6 | 498 | |
46bc8d4b | 499 | if (il->disable_sens_cal) |
be663ab6 WYG |
500 | return; |
501 | ||
46bc8d4b | 502 | data = &(il->sensitivity_data); |
be663ab6 | 503 | |
46bc8d4b | 504 | if (!il_is_any_associated(il)) { |
58de00a4 | 505 | D_CALIB("<< - not associated\n"); |
be663ab6 WYG |
506 | return; |
507 | } | |
508 | ||
46bc8d4b | 509 | spin_lock_irqsave(&il->lock, flags); |
be663ab6 | 510 | |
ebf0d90d SG |
511 | rx_info = &(((struct il_notif_stats *)resp)->rx.general); |
512 | ofdm = &(((struct il_notif_stats *)resp)->rx.ofdm); | |
513 | cck = &(((struct il_notif_stats *)resp)->rx.cck); | |
be663ab6 WYG |
514 | |
515 | if (rx_info->interference_data_flag != INTERFERENCE_DATA_AVAILABLE) { | |
58de00a4 | 516 | D_CALIB("<< invalid data.\n"); |
46bc8d4b | 517 | spin_unlock_irqrestore(&il->lock, flags); |
be663ab6 WYG |
518 | return; |
519 | } | |
520 | ||
521 | /* Extract Statistics: */ | |
522 | rx_enable_time = le32_to_cpu(rx_info->channel_load); | |
523 | fa_cck = le32_to_cpu(cck->false_alarm_cnt); | |
524 | fa_ofdm = le32_to_cpu(ofdm->false_alarm_cnt); | |
525 | bad_plcp_cck = le32_to_cpu(cck->plcp_err); | |
526 | bad_plcp_ofdm = le32_to_cpu(ofdm->plcp_err); | |
527 | ||
528 | statis.beacon_silence_rssi_a = | |
e7392364 | 529 | le32_to_cpu(rx_info->beacon_silence_rssi_a); |
be663ab6 | 530 | statis.beacon_silence_rssi_b = |
e7392364 | 531 | le32_to_cpu(rx_info->beacon_silence_rssi_b); |
be663ab6 | 532 | statis.beacon_silence_rssi_c = |
e7392364 SG |
533 | le32_to_cpu(rx_info->beacon_silence_rssi_c); |
534 | statis.beacon_energy_a = le32_to_cpu(rx_info->beacon_energy_a); | |
535 | statis.beacon_energy_b = le32_to_cpu(rx_info->beacon_energy_b); | |
536 | statis.beacon_energy_c = le32_to_cpu(rx_info->beacon_energy_c); | |
be663ab6 | 537 | |
46bc8d4b | 538 | spin_unlock_irqrestore(&il->lock, flags); |
be663ab6 | 539 | |
58de00a4 | 540 | D_CALIB("rx_enable_time = %u usecs\n", rx_enable_time); |
be663ab6 WYG |
541 | |
542 | if (!rx_enable_time) { | |
58de00a4 | 543 | D_CALIB("<< RX Enable Time == 0!\n"); |
be663ab6 WYG |
544 | return; |
545 | } | |
546 | ||
ebf0d90d | 547 | /* These stats increase monotonically, and do not reset |
be663ab6 | 548 | * at each beacon. Calculate difference from last value, or just |
ebf0d90d | 549 | * use the new stats value if it has reset or wrapped around. */ |
be663ab6 WYG |
550 | if (data->last_bad_plcp_cnt_cck > bad_plcp_cck) |
551 | data->last_bad_plcp_cnt_cck = bad_plcp_cck; | |
552 | else { | |
553 | bad_plcp_cck -= data->last_bad_plcp_cnt_cck; | |
554 | data->last_bad_plcp_cnt_cck += bad_plcp_cck; | |
555 | } | |
556 | ||
557 | if (data->last_bad_plcp_cnt_ofdm > bad_plcp_ofdm) | |
558 | data->last_bad_plcp_cnt_ofdm = bad_plcp_ofdm; | |
559 | else { | |
560 | bad_plcp_ofdm -= data->last_bad_plcp_cnt_ofdm; | |
561 | data->last_bad_plcp_cnt_ofdm += bad_plcp_ofdm; | |
562 | } | |
563 | ||
564 | if (data->last_fa_cnt_ofdm > fa_ofdm) | |
565 | data->last_fa_cnt_ofdm = fa_ofdm; | |
566 | else { | |
567 | fa_ofdm -= data->last_fa_cnt_ofdm; | |
568 | data->last_fa_cnt_ofdm += fa_ofdm; | |
569 | } | |
570 | ||
571 | if (data->last_fa_cnt_cck > fa_cck) | |
572 | data->last_fa_cnt_cck = fa_cck; | |
573 | else { | |
574 | fa_cck -= data->last_fa_cnt_cck; | |
575 | data->last_fa_cnt_cck += fa_cck; | |
576 | } | |
577 | ||
578 | /* Total aborted signal locks */ | |
579 | norm_fa_ofdm = fa_ofdm + bad_plcp_ofdm; | |
580 | norm_fa_cck = fa_cck + bad_plcp_cck; | |
581 | ||
e7392364 SG |
582 | D_CALIB("cck: fa %u badp %u ofdm: fa %u badp %u\n", fa_cck, |
583 | bad_plcp_cck, fa_ofdm, bad_plcp_ofdm); | |
be663ab6 | 584 | |
46bc8d4b SG |
585 | il4965_sens_auto_corr_ofdm(il, norm_fa_ofdm, rx_enable_time); |
586 | il4965_sens_energy_cck(il, norm_fa_cck, rx_enable_time, &statis); | |
be663ab6 | 587 | |
46bc8d4b | 588 | il4965_sensitivity_write(il); |
be663ab6 WYG |
589 | } |
590 | ||
e7392364 SG |
591 | static inline u8 |
592 | il4965_find_first_chain(u8 mask) | |
be663ab6 WYG |
593 | { |
594 | if (mask & ANT_A) | |
595 | return CHAIN_A; | |
596 | if (mask & ANT_B) | |
597 | return CHAIN_B; | |
598 | return CHAIN_C; | |
599 | } | |
600 | ||
601 | /** | |
602 | * Run disconnected antenna algorithm to find out which antennas are | |
603 | * disconnected. | |
604 | */ | |
605 | static void | |
e7392364 SG |
606 | il4965_find_disconn_antenna(struct il_priv *il, u32 * average_sig, |
607 | struct il_chain_noise_data *data) | |
be663ab6 WYG |
608 | { |
609 | u32 active_chains = 0; | |
610 | u32 max_average_sig; | |
611 | u16 max_average_sig_antenna_i; | |
612 | u8 num_tx_chains; | |
613 | u8 first_chain; | |
614 | u16 i = 0; | |
615 | ||
e7392364 SG |
616 | average_sig[0] = |
617 | data->chain_signal_a / | |
89ef1ed2 | 618 | il->cfg->chain_noise_num_beacons; |
e7392364 SG |
619 | average_sig[1] = |
620 | data->chain_signal_b / | |
89ef1ed2 | 621 | il->cfg->chain_noise_num_beacons; |
e7392364 SG |
622 | average_sig[2] = |
623 | data->chain_signal_c / | |
89ef1ed2 | 624 | il->cfg->chain_noise_num_beacons; |
be663ab6 WYG |
625 | |
626 | if (average_sig[0] >= average_sig[1]) { | |
627 | max_average_sig = average_sig[0]; | |
628 | max_average_sig_antenna_i = 0; | |
629 | active_chains = (1 << max_average_sig_antenna_i); | |
630 | } else { | |
631 | max_average_sig = average_sig[1]; | |
632 | max_average_sig_antenna_i = 1; | |
633 | active_chains = (1 << max_average_sig_antenna_i); | |
634 | } | |
635 | ||
636 | if (average_sig[2] >= max_average_sig) { | |
637 | max_average_sig = average_sig[2]; | |
638 | max_average_sig_antenna_i = 2; | |
639 | active_chains = (1 << max_average_sig_antenna_i); | |
640 | } | |
641 | ||
e7392364 SG |
642 | D_CALIB("average_sig: a %d b %d c %d\n", average_sig[0], average_sig[1], |
643 | average_sig[2]); | |
644 | D_CALIB("max_average_sig = %d, antenna %d\n", max_average_sig, | |
645 | max_average_sig_antenna_i); | |
be663ab6 WYG |
646 | |
647 | /* Compare signal strengths for all 3 receivers. */ | |
648 | for (i = 0; i < NUM_RX_CHAINS; i++) { | |
649 | if (i != max_average_sig_antenna_i) { | |
650 | s32 rssi_delta = (max_average_sig - average_sig[i]); | |
651 | ||
652 | /* If signal is very weak, compared with | |
653 | * strongest, mark it as disconnected. */ | |
654 | if (rssi_delta > MAXIMUM_ALLOWED_PATHLOSS) | |
655 | data->disconn_array[i] = 1; | |
656 | else | |
657 | active_chains |= (1 << i); | |
58de00a4 | 658 | D_CALIB("i = %d rssiDelta = %d " |
e7392364 SG |
659 | "disconn_array[i] = %d\n", i, rssi_delta, |
660 | data->disconn_array[i]); | |
be663ab6 WYG |
661 | } |
662 | } | |
663 | ||
664 | /* | |
665 | * The above algorithm sometimes fails when the ucode | |
666 | * reports 0 for all chains. It's not clear why that | |
667 | * happens to start with, but it is then causing trouble | |
668 | * because this can make us enable more chains than the | |
669 | * hardware really has. | |
670 | * | |
671 | * To be safe, simply mask out any chains that we know | |
672 | * are not on the device. | |
673 | */ | |
46bc8d4b | 674 | active_chains &= il->hw_params.valid_rx_ant; |
be663ab6 WYG |
675 | |
676 | num_tx_chains = 0; | |
677 | for (i = 0; i < NUM_RX_CHAINS; i++) { | |
678 | /* loops on all the bits of | |
46bc8d4b | 679 | * il->hw_setting.valid_tx_ant */ |
be663ab6 | 680 | u8 ant_msk = (1 << i); |
46bc8d4b | 681 | if (!(il->hw_params.valid_tx_ant & ant_msk)) |
be663ab6 WYG |
682 | continue; |
683 | ||
684 | num_tx_chains++; | |
685 | if (data->disconn_array[i] == 0) | |
686 | /* there is a Tx antenna connected */ | |
687 | break; | |
46bc8d4b | 688 | if (num_tx_chains == il->hw_params.tx_chains_num && |
be663ab6 WYG |
689 | data->disconn_array[i]) { |
690 | /* | |
691 | * If all chains are disconnected | |
692 | * connect the first valid tx chain | |
693 | */ | |
694 | first_chain = | |
e7392364 | 695 | il4965_find_first_chain(il->cfg->valid_tx_ant); |
be663ab6 WYG |
696 | data->disconn_array[first_chain] = 0; |
697 | active_chains |= BIT(first_chain); | |
1722f8e1 SG |
698 | D_CALIB("All Tx chains are disconnected" |
699 | "- declare %d as connected\n", first_chain); | |
be663ab6 WYG |
700 | break; |
701 | } | |
702 | } | |
703 | ||
46bc8d4b SG |
704 | if (active_chains != il->hw_params.valid_rx_ant && |
705 | active_chains != il->chain_noise_data.active_chains) | |
e7392364 SG |
706 | D_CALIB("Detected that not all antennas are connected! " |
707 | "Connected: %#x, valid: %#x.\n", active_chains, | |
708 | il->hw_params.valid_rx_ant); | |
be663ab6 WYG |
709 | |
710 | /* Save for use within RXON, TX, SCAN commands, etc. */ | |
711 | data->active_chains = active_chains; | |
e7392364 | 712 | D_CALIB("active_chains (bitwise) = 0x%x\n", active_chains); |
be663ab6 WYG |
713 | } |
714 | ||
e7392364 SG |
715 | static void |
716 | il4965_gain_computation(struct il_priv *il, u32 * average_noise, | |
717 | u16 min_average_noise_antenna_i, u32 min_average_noise, | |
718 | u8 default_chain) | |
be663ab6 WYG |
719 | { |
720 | int i, ret; | |
46bc8d4b | 721 | struct il_chain_noise_data *data = &il->chain_noise_data; |
be663ab6 WYG |
722 | |
723 | data->delta_gain_code[min_average_noise_antenna_i] = 0; | |
724 | ||
725 | for (i = default_chain; i < NUM_RX_CHAINS; i++) { | |
726 | s32 delta_g = 0; | |
727 | ||
232913b5 | 728 | if (!data->disconn_array[i] && |
e7392364 SG |
729 | data->delta_gain_code[i] == |
730 | CHAIN_NOISE_DELTA_GAIN_INIT_VAL) { | |
be663ab6 | 731 | delta_g = average_noise[i] - min_average_noise; |
e7392364 | 732 | data->delta_gain_code[i] = (u8) ((delta_g * 10) / 15); |
be663ab6 | 733 | data->delta_gain_code[i] = |
e7392364 | 734 | min(data->delta_gain_code[i], |
be663ab6 WYG |
735 | (u8) CHAIN_NOISE_MAX_DELTA_GAIN_CODE); |
736 | ||
737 | data->delta_gain_code[i] = | |
e7392364 | 738 | (data->delta_gain_code[i] | (1 << 2)); |
be663ab6 WYG |
739 | } else { |
740 | data->delta_gain_code[i] = 0; | |
741 | } | |
742 | } | |
e7392364 SG |
743 | D_CALIB("delta_gain_codes: a %d b %d c %d\n", data->delta_gain_code[0], |
744 | data->delta_gain_code[1], data->delta_gain_code[2]); | |
be663ab6 WYG |
745 | |
746 | /* Differential gain gets sent to uCode only once */ | |
747 | if (!data->radio_write) { | |
e2ebc833 | 748 | struct il_calib_diff_gain_cmd cmd; |
be663ab6 WYG |
749 | data->radio_write = 1; |
750 | ||
751 | memset(&cmd, 0, sizeof(cmd)); | |
e2ebc833 | 752 | cmd.hdr.op_code = IL_PHY_CALIBRATE_DIFF_GAIN_CMD; |
be663ab6 WYG |
753 | cmd.diff_gain_a = data->delta_gain_code[0]; |
754 | cmd.diff_gain_b = data->delta_gain_code[1]; | |
755 | cmd.diff_gain_c = data->delta_gain_code[2]; | |
e7392364 | 756 | ret = il_send_cmd_pdu(il, C_PHY_CALIBRATION, sizeof(cmd), &cmd); |
be663ab6 | 757 | if (ret) |
e7392364 | 758 | D_CALIB("fail sending cmd " "C_PHY_CALIBRATION\n"); |
be663ab6 WYG |
759 | |
760 | /* TODO we might want recalculate | |
761 | * rx_chain in rxon cmd */ | |
762 | ||
763 | /* Mark so we run this algo only once! */ | |
e2ebc833 | 764 | data->state = IL_CHAIN_NOISE_CALIBRATED; |
be663ab6 WYG |
765 | } |
766 | } | |
767 | ||
be663ab6 | 768 | /* |
ebf0d90d | 769 | * Accumulate 16 beacons of signal and noise stats for each of |
be663ab6 WYG |
770 | * 3 receivers/antennas/rx-chains, then figure out: |
771 | * 1) Which antennas are connected. | |
772 | * 2) Differential rx gain settings to balance the 3 receivers. | |
773 | */ | |
e7392364 SG |
774 | void |
775 | il4965_chain_noise_calibration(struct il_priv *il, void *stat_resp) | |
be663ab6 | 776 | { |
e2ebc833 | 777 | struct il_chain_noise_data *data = NULL; |
be663ab6 WYG |
778 | |
779 | u32 chain_noise_a; | |
780 | u32 chain_noise_b; | |
781 | u32 chain_noise_c; | |
782 | u32 chain_sig_a; | |
783 | u32 chain_sig_b; | |
784 | u32 chain_sig_c; | |
e7392364 SG |
785 | u32 average_sig[NUM_RX_CHAINS] = { INITIALIZATION_VALUE }; |
786 | u32 average_noise[NUM_RX_CHAINS] = { INITIALIZATION_VALUE }; | |
be663ab6 WYG |
787 | u32 min_average_noise = MIN_AVERAGE_NOISE_MAX_VALUE; |
788 | u16 min_average_noise_antenna_i = INITIALIZATION_VALUE; | |
789 | u16 i = 0; | |
790 | u16 rxon_chnum = INITIALIZATION_VALUE; | |
791 | u16 stat_chnum = INITIALIZATION_VALUE; | |
792 | u8 rxon_band24; | |
793 | u8 stat_band24; | |
794 | unsigned long flags; | |
ebf0d90d | 795 | struct stats_rx_non_phy *rx_info; |
be663ab6 | 796 | |
46bc8d4b | 797 | if (il->disable_chain_noise_cal) |
be663ab6 WYG |
798 | return; |
799 | ||
46bc8d4b | 800 | data = &(il->chain_noise_data); |
be663ab6 WYG |
801 | |
802 | /* | |
803 | * Accumulate just the first "chain_noise_num_beacons" after | |
804 | * the first association, then we're done forever. | |
805 | */ | |
e2ebc833 SG |
806 | if (data->state != IL_CHAIN_NOISE_ACCUMULATE) { |
807 | if (data->state == IL_CHAIN_NOISE_ALIVE) | |
58de00a4 | 808 | D_CALIB("Wait for noise calib reset\n"); |
be663ab6 WYG |
809 | return; |
810 | } | |
811 | ||
46bc8d4b | 812 | spin_lock_irqsave(&il->lock, flags); |
be663ab6 | 813 | |
e7392364 | 814 | rx_info = &(((struct il_notif_stats *)stat_resp)->rx.general); |
be663ab6 WYG |
815 | |
816 | if (rx_info->interference_data_flag != INTERFERENCE_DATA_AVAILABLE) { | |
58de00a4 | 817 | D_CALIB(" << Interference data unavailable\n"); |
46bc8d4b | 818 | spin_unlock_irqrestore(&il->lock, flags); |
be663ab6 WYG |
819 | return; |
820 | } | |
821 | ||
c8b03958 SG |
822 | rxon_band24 = !!(il->staging.flags & RXON_FLG_BAND_24G_MSK); |
823 | rxon_chnum = le16_to_cpu(il->staging.channel); | |
be663ab6 | 824 | |
e7392364 SG |
825 | stat_band24 = |
826 | !!(((struct il_notif_stats *)stat_resp)-> | |
827 | flag & STATS_REPLY_FLG_BAND_24G_MSK); | |
828 | stat_chnum = | |
829 | le32_to_cpu(((struct il_notif_stats *)stat_resp)->flag) >> 16; | |
be663ab6 WYG |
830 | |
831 | /* Make sure we accumulate data for just the associated channel | |
832 | * (even if scanning). */ | |
232913b5 | 833 | if (rxon_chnum != stat_chnum || rxon_band24 != stat_band24) { |
e7392364 SG |
834 | D_CALIB("Stats not from chan=%d, band24=%d\n", rxon_chnum, |
835 | rxon_band24); | |
46bc8d4b | 836 | spin_unlock_irqrestore(&il->lock, flags); |
be663ab6 WYG |
837 | return; |
838 | } | |
839 | ||
840 | /* | |
ebf0d90d | 841 | * Accumulate beacon stats values across |
be663ab6 WYG |
842 | * "chain_noise_num_beacons" |
843 | */ | |
e7392364 SG |
844 | chain_noise_a = |
845 | le32_to_cpu(rx_info->beacon_silence_rssi_a) & IN_BAND_FILTER; | |
846 | chain_noise_b = | |
847 | le32_to_cpu(rx_info->beacon_silence_rssi_b) & IN_BAND_FILTER; | |
848 | chain_noise_c = | |
849 | le32_to_cpu(rx_info->beacon_silence_rssi_c) & IN_BAND_FILTER; | |
be663ab6 WYG |
850 | |
851 | chain_sig_a = le32_to_cpu(rx_info->beacon_rssi_a) & IN_BAND_FILTER; | |
852 | chain_sig_b = le32_to_cpu(rx_info->beacon_rssi_b) & IN_BAND_FILTER; | |
853 | chain_sig_c = le32_to_cpu(rx_info->beacon_rssi_c) & IN_BAND_FILTER; | |
854 | ||
46bc8d4b | 855 | spin_unlock_irqrestore(&il->lock, flags); |
be663ab6 WYG |
856 | |
857 | data->beacon_count++; | |
858 | ||
859 | data->chain_noise_a = (chain_noise_a + data->chain_noise_a); | |
860 | data->chain_noise_b = (chain_noise_b + data->chain_noise_b); | |
861 | data->chain_noise_c = (chain_noise_c + data->chain_noise_c); | |
862 | ||
863 | data->chain_signal_a = (chain_sig_a + data->chain_signal_a); | |
864 | data->chain_signal_b = (chain_sig_b + data->chain_signal_b); | |
865 | data->chain_signal_c = (chain_sig_c + data->chain_signal_c); | |
866 | ||
e7392364 SG |
867 | D_CALIB("chan=%d, band24=%d, beacon=%d\n", rxon_chnum, rxon_band24, |
868 | data->beacon_count); | |
869 | D_CALIB("chain_sig: a %d b %d c %d\n", chain_sig_a, chain_sig_b, | |
870 | chain_sig_c); | |
871 | D_CALIB("chain_noise: a %d b %d c %d\n", chain_noise_a, chain_noise_b, | |
872 | chain_noise_c); | |
be663ab6 WYG |
873 | |
874 | /* If this is the "chain_noise_num_beacons", determine: | |
875 | * 1) Disconnected antennas (using signal strengths) | |
876 | * 2) Differential gain (using silence noise) to balance receivers */ | |
89ef1ed2 | 877 | if (data->beacon_count != il->cfg->chain_noise_num_beacons) |
be663ab6 WYG |
878 | return; |
879 | ||
880 | /* Analyze signal for disconnected antenna */ | |
46bc8d4b | 881 | il4965_find_disconn_antenna(il, average_sig, data); |
be663ab6 WYG |
882 | |
883 | /* Analyze noise for rx balance */ | |
e7392364 | 884 | average_noise[0] = |
89ef1ed2 | 885 | data->chain_noise_a / il->cfg->chain_noise_num_beacons; |
e7392364 | 886 | average_noise[1] = |
89ef1ed2 | 887 | data->chain_noise_b / il->cfg->chain_noise_num_beacons; |
e7392364 | 888 | average_noise[2] = |
89ef1ed2 | 889 | data->chain_noise_c / il->cfg->chain_noise_num_beacons; |
be663ab6 WYG |
890 | |
891 | for (i = 0; i < NUM_RX_CHAINS; i++) { | |
232913b5 SG |
892 | if (!data->disconn_array[i] && |
893 | average_noise[i] <= min_average_noise) { | |
be663ab6 WYG |
894 | /* This means that chain i is active and has |
895 | * lower noise values so far: */ | |
896 | min_average_noise = average_noise[i]; | |
897 | min_average_noise_antenna_i = i; | |
898 | } | |
899 | } | |
900 | ||
e7392364 SG |
901 | D_CALIB("average_noise: a %d b %d c %d\n", average_noise[0], |
902 | average_noise[1], average_noise[2]); | |
be663ab6 | 903 | |
e7392364 SG |
904 | D_CALIB("min_average_noise = %d, antenna %d\n", min_average_noise, |
905 | min_average_noise_antenna_i); | |
be663ab6 | 906 | |
e7392364 SG |
907 | il4965_gain_computation(il, average_noise, min_average_noise_antenna_i, |
908 | min_average_noise, | |
909 | il4965_find_first_chain(il->cfg->valid_rx_ant)); | |
be663ab6 WYG |
910 | |
911 | /* Some power changes may have been made during the calibration. | |
912 | * Update and commit the RXON | |
913 | */ | |
1600b875 SG |
914 | if (il->ops->update_chain_flags) |
915 | il->ops->update_chain_flags(il); | |
be663ab6 | 916 | |
e2ebc833 | 917 | data->state = IL_CHAIN_NOISE_DONE; |
46bc8d4b | 918 | il_power_update_mode(il, false); |
be663ab6 WYG |
919 | } |
920 | ||
e7392364 SG |
921 | void |
922 | il4965_reset_run_time_calib(struct il_priv *il) | |
be663ab6 WYG |
923 | { |
924 | int i; | |
e7392364 SG |
925 | memset(&(il->sensitivity_data), 0, sizeof(struct il_sensitivity_data)); |
926 | memset(&(il->chain_noise_data), 0, sizeof(struct il_chain_noise_data)); | |
be663ab6 | 927 | for (i = 0; i < NUM_RX_CHAINS; i++) |
46bc8d4b | 928 | il->chain_noise_data.delta_gain_code[i] = |
e7392364 | 929 | CHAIN_NOISE_DELTA_GAIN_INIT_VAL; |
be663ab6 | 930 | |
ebf0d90d | 931 | /* Ask for stats now, the uCode will send notification |
be663ab6 | 932 | * periodically after association */ |
ebf0d90d | 933 | il_send_stats_request(il, CMD_ASYNC, true); |
be663ab6 | 934 | } |