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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 | ||
46bc8d4b | 82 | void il4965_calib_free_results(struct il_priv *il) |
be663ab6 WYG |
83 | { |
84 | int i; | |
85 | ||
e2ebc833 | 86 | for (i = 0; i < IL_CALIB_MAX; i++) { |
46bc8d4b SG |
87 | kfree(il->calib_results[i].buf); |
88 | il->calib_results[i].buf = NULL; | |
89 | il->calib_results[i].buf_len = 0; | |
be663ab6 WYG |
90 | } |
91 | } | |
92 | ||
93 | /***************************************************************************** | |
94 | * RUNTIME calibrations framework | |
95 | *****************************************************************************/ | |
96 | ||
97 | /* "false alarms" are signals that our DSP tries to lock onto, | |
98 | * but then determines that they are either noise, or transmissions | |
99 | * from a distant wireless network (also "noise", really) that get | |
100 | * "stepped on" by stronger transmissions within our own network. | |
101 | * This algorithm attempts to set a sensitivity level that is high | |
102 | * enough to receive all of our own network traffic, but not so | |
103 | * high that our DSP gets too busy trying to lock onto non-network | |
104 | * activity/noise. */ | |
46bc8d4b | 105 | static int il4965_sens_energy_cck(struct il_priv *il, |
be663ab6 WYG |
106 | u32 norm_fa, |
107 | u32 rx_enable_time, | |
ebf0d90d | 108 | struct stats_general_data *rx_info) |
be663ab6 WYG |
109 | { |
110 | u32 max_nrg_cck = 0; | |
111 | int i = 0; | |
112 | u8 max_silence_rssi = 0; | |
113 | u32 silence_ref = 0; | |
114 | u8 silence_rssi_a = 0; | |
115 | u8 silence_rssi_b = 0; | |
116 | u8 silence_rssi_c = 0; | |
117 | u32 val; | |
118 | ||
119 | /* "false_alarms" values below are cross-multiplications to assess the | |
120 | * numbers of false alarms within the measured period of actual Rx | |
121 | * (Rx is off when we're txing), vs the min/max expected false alarms | |
122 | * (some should be expected if rx is sensitive enough) in a | |
123 | * hypothetical listening period of 200 time units (TU), 204.8 msec: | |
124 | * | |
125 | * MIN_FA/fixed-time < false_alarms/actual-rx-time < MAX_FA/beacon-time | |
126 | * | |
127 | * */ | |
128 | u32 false_alarms = norm_fa * 200 * 1024; | |
129 | u32 max_false_alarms = MAX_FA_CCK * rx_enable_time; | |
130 | u32 min_false_alarms = MIN_FA_CCK * rx_enable_time; | |
e2ebc833 | 131 | struct il_sensitivity_data *data = NULL; |
46bc8d4b | 132 | const struct il_sensitivity_ranges *ranges = il->hw_params.sens; |
be663ab6 | 133 | |
46bc8d4b | 134 | data = &(il->sensitivity_data); |
be663ab6 WYG |
135 | |
136 | data->nrg_auto_corr_silence_diff = 0; | |
137 | ||
138 | /* Find max silence rssi among all 3 receivers. | |
139 | * This is background noise, which may include transmissions from other | |
140 | * networks, measured during silence before our network's beacon */ | |
141 | silence_rssi_a = (u8)((rx_info->beacon_silence_rssi_a & | |
142 | ALL_BAND_FILTER) >> 8); | |
143 | silence_rssi_b = (u8)((rx_info->beacon_silence_rssi_b & | |
144 | ALL_BAND_FILTER) >> 8); | |
145 | silence_rssi_c = (u8)((rx_info->beacon_silence_rssi_c & | |
146 | ALL_BAND_FILTER) >> 8); | |
147 | ||
148 | val = max(silence_rssi_b, silence_rssi_c); | |
149 | max_silence_rssi = max(silence_rssi_a, (u8) val); | |
150 | ||
151 | /* Store silence rssi in 20-beacon history table */ | |
152 | data->nrg_silence_rssi[data->nrg_silence_idx] = max_silence_rssi; | |
153 | data->nrg_silence_idx++; | |
154 | if (data->nrg_silence_idx >= NRG_NUM_PREV_STAT_L) | |
155 | data->nrg_silence_idx = 0; | |
156 | ||
157 | /* Find max silence rssi across 20 beacon history */ | |
158 | for (i = 0; i < NRG_NUM_PREV_STAT_L; i++) { | |
159 | val = data->nrg_silence_rssi[i]; | |
160 | silence_ref = max(silence_ref, val); | |
161 | } | |
58de00a4 | 162 | D_CALIB("silence a %u, b %u, c %u, 20-bcn max %u\n", |
be663ab6 WYG |
163 | silence_rssi_a, silence_rssi_b, silence_rssi_c, |
164 | silence_ref); | |
165 | ||
166 | /* Find max rx energy (min value!) among all 3 receivers, | |
167 | * measured during beacon frame. | |
168 | * Save it in 10-beacon history table. */ | |
169 | i = data->nrg_energy_idx; | |
170 | val = min(rx_info->beacon_energy_b, rx_info->beacon_energy_c); | |
171 | data->nrg_value[i] = min(rx_info->beacon_energy_a, val); | |
172 | ||
173 | data->nrg_energy_idx++; | |
174 | if (data->nrg_energy_idx >= 10) | |
175 | data->nrg_energy_idx = 0; | |
176 | ||
177 | /* Find min rx energy (max value) across 10 beacon history. | |
178 | * This is the minimum signal level that we want to receive well. | |
179 | * Add backoff (margin so we don't miss slightly lower energy frames). | |
180 | * This establishes an upper bound (min value) for energy threshold. */ | |
181 | max_nrg_cck = data->nrg_value[0]; | |
182 | for (i = 1; i < 10; i++) | |
183 | max_nrg_cck = (u32) max(max_nrg_cck, (data->nrg_value[i])); | |
184 | max_nrg_cck += 6; | |
185 | ||
58de00a4 | 186 | D_CALIB("rx energy a %u, b %u, c %u, 10-bcn max/min %u\n", |
be663ab6 WYG |
187 | rx_info->beacon_energy_a, rx_info->beacon_energy_b, |
188 | rx_info->beacon_energy_c, max_nrg_cck - 6); | |
189 | ||
190 | /* Count number of consecutive beacons with fewer-than-desired | |
191 | * false alarms. */ | |
192 | if (false_alarms < min_false_alarms) | |
193 | data->num_in_cck_no_fa++; | |
194 | else | |
195 | data->num_in_cck_no_fa = 0; | |
58de00a4 | 196 | D_CALIB("consecutive bcns with few false alarms = %u\n", |
be663ab6 WYG |
197 | data->num_in_cck_no_fa); |
198 | ||
199 | /* If we got too many false alarms this time, reduce sensitivity */ | |
232913b5 SG |
200 | if (false_alarms > max_false_alarms && |
201 | data->auto_corr_cck > AUTO_CORR_MAX_TH_CCK) { | |
58de00a4 | 202 | D_CALIB("norm FA %u > max FA %u\n", |
be663ab6 | 203 | false_alarms, max_false_alarms); |
58de00a4 | 204 | D_CALIB("... reducing sensitivity\n"); |
e2ebc833 | 205 | data->nrg_curr_state = IL_FA_TOO_MANY; |
be663ab6 WYG |
206 | /* Store for "fewer than desired" on later beacon */ |
207 | data->nrg_silence_ref = silence_ref; | |
208 | ||
209 | /* increase energy threshold (reduce nrg value) | |
210 | * to decrease sensitivity */ | |
211 | data->nrg_th_cck = data->nrg_th_cck - NRG_STEP_CCK; | |
212 | /* Else if we got fewer than desired, increase sensitivity */ | |
213 | } else if (false_alarms < min_false_alarms) { | |
e2ebc833 | 214 | data->nrg_curr_state = IL_FA_TOO_FEW; |
be663ab6 WYG |
215 | |
216 | /* Compare silence level with silence level for most recent | |
217 | * healthy number or too many false alarms */ | |
218 | data->nrg_auto_corr_silence_diff = (s32)data->nrg_silence_ref - | |
219 | (s32)silence_ref; | |
220 | ||
58de00a4 | 221 | D_CALIB( |
be663ab6 WYG |
222 | "norm FA %u < min FA %u, silence diff %d\n", |
223 | false_alarms, min_false_alarms, | |
224 | data->nrg_auto_corr_silence_diff); | |
225 | ||
226 | /* Increase value to increase sensitivity, but only if: | |
227 | * 1a) previous beacon did *not* have *too many* false alarms | |
228 | * 1b) AND there's a significant difference in Rx levels | |
229 | * from a previous beacon with too many, or healthy # FAs | |
230 | * OR 2) We've seen a lot of beacons (100) with too few | |
231 | * false alarms */ | |
232913b5 SG |
232 | if (data->nrg_prev_state != IL_FA_TOO_MANY && |
233 | (data->nrg_auto_corr_silence_diff > NRG_DIFF || | |
234 | data->num_in_cck_no_fa > MAX_NUMBER_CCK_NO_FA)) { | |
be663ab6 | 235 | |
58de00a4 | 236 | D_CALIB("... increasing sensitivity\n"); |
be663ab6 WYG |
237 | /* Increase nrg value to increase sensitivity */ |
238 | val = data->nrg_th_cck + NRG_STEP_CCK; | |
239 | data->nrg_th_cck = min((u32)ranges->min_nrg_cck, val); | |
240 | } else { | |
58de00a4 | 241 | D_CALIB( |
be663ab6 WYG |
242 | "... but not changing sensitivity\n"); |
243 | } | |
244 | ||
245 | /* Else we got a healthy number of false alarms, keep status quo */ | |
246 | } else { | |
58de00a4 | 247 | D_CALIB(" FA in safe zone\n"); |
e2ebc833 | 248 | data->nrg_curr_state = IL_FA_GOOD_RANGE; |
be663ab6 WYG |
249 | |
250 | /* Store for use in "fewer than desired" with later beacon */ | |
251 | data->nrg_silence_ref = silence_ref; | |
252 | ||
253 | /* If previous beacon had too many false alarms, | |
254 | * give it some extra margin by reducing sensitivity again | |
255 | * (but don't go below measured energy of desired Rx) */ | |
e2ebc833 | 256 | if (IL_FA_TOO_MANY == data->nrg_prev_state) { |
58de00a4 | 257 | D_CALIB("... increasing margin\n"); |
be663ab6 WYG |
258 | if (data->nrg_th_cck > (max_nrg_cck + NRG_MARGIN)) |
259 | data->nrg_th_cck -= NRG_MARGIN; | |
260 | else | |
261 | data->nrg_th_cck = max_nrg_cck; | |
262 | } | |
263 | } | |
264 | ||
265 | /* Make sure the energy threshold does not go above the measured | |
266 | * energy of the desired Rx signals (reduced by backoff margin), | |
267 | * or else we might start missing Rx frames. | |
268 | * Lower value is higher energy, so we use max()! | |
269 | */ | |
270 | data->nrg_th_cck = max(max_nrg_cck, data->nrg_th_cck); | |
58de00a4 | 271 | D_CALIB("new nrg_th_cck %u\n", data->nrg_th_cck); |
be663ab6 WYG |
272 | |
273 | data->nrg_prev_state = data->nrg_curr_state; | |
274 | ||
275 | /* Auto-correlation CCK algorithm */ | |
276 | if (false_alarms > min_false_alarms) { | |
277 | ||
278 | /* increase auto_corr values to decrease sensitivity | |
279 | * so the DSP won't be disturbed by the noise | |
280 | */ | |
281 | if (data->auto_corr_cck < AUTO_CORR_MAX_TH_CCK) | |
282 | data->auto_corr_cck = AUTO_CORR_MAX_TH_CCK + 1; | |
283 | else { | |
284 | val = data->auto_corr_cck + AUTO_CORR_STEP_CCK; | |
285 | data->auto_corr_cck = | |
286 | min((u32)ranges->auto_corr_max_cck, val); | |
287 | } | |
288 | val = data->auto_corr_cck_mrc + AUTO_CORR_STEP_CCK; | |
289 | data->auto_corr_cck_mrc = | |
290 | min((u32)ranges->auto_corr_max_cck_mrc, val); | |
232913b5 SG |
291 | } else if (false_alarms < min_false_alarms && |
292 | (data->nrg_auto_corr_silence_diff > NRG_DIFF || | |
293 | data->num_in_cck_no_fa > MAX_NUMBER_CCK_NO_FA)) { | |
be663ab6 WYG |
294 | |
295 | /* Decrease auto_corr values to increase sensitivity */ | |
296 | val = data->auto_corr_cck - AUTO_CORR_STEP_CCK; | |
297 | data->auto_corr_cck = | |
298 | max((u32)ranges->auto_corr_min_cck, val); | |
299 | val = data->auto_corr_cck_mrc - AUTO_CORR_STEP_CCK; | |
300 | data->auto_corr_cck_mrc = | |
301 | max((u32)ranges->auto_corr_min_cck_mrc, val); | |
302 | } | |
303 | ||
304 | return 0; | |
305 | } | |
306 | ||
307 | ||
46bc8d4b | 308 | static int il4965_sens_auto_corr_ofdm(struct il_priv *il, |
be663ab6 WYG |
309 | u32 norm_fa, |
310 | u32 rx_enable_time) | |
311 | { | |
312 | u32 val; | |
313 | u32 false_alarms = norm_fa * 200 * 1024; | |
314 | u32 max_false_alarms = MAX_FA_OFDM * rx_enable_time; | |
315 | u32 min_false_alarms = MIN_FA_OFDM * rx_enable_time; | |
e2ebc833 | 316 | struct il_sensitivity_data *data = NULL; |
46bc8d4b | 317 | const struct il_sensitivity_ranges *ranges = il->hw_params.sens; |
be663ab6 | 318 | |
46bc8d4b | 319 | data = &(il->sensitivity_data); |
be663ab6 WYG |
320 | |
321 | /* If we got too many false alarms this time, reduce sensitivity */ | |
322 | if (false_alarms > max_false_alarms) { | |
323 | ||
58de00a4 | 324 | D_CALIB("norm FA %u > max FA %u)\n", |
be663ab6 WYG |
325 | false_alarms, max_false_alarms); |
326 | ||
327 | val = data->auto_corr_ofdm + AUTO_CORR_STEP_OFDM; | |
328 | data->auto_corr_ofdm = | |
329 | min((u32)ranges->auto_corr_max_ofdm, val); | |
330 | ||
331 | val = data->auto_corr_ofdm_mrc + AUTO_CORR_STEP_OFDM; | |
332 | data->auto_corr_ofdm_mrc = | |
333 | min((u32)ranges->auto_corr_max_ofdm_mrc, val); | |
334 | ||
335 | val = data->auto_corr_ofdm_x1 + AUTO_CORR_STEP_OFDM; | |
336 | data->auto_corr_ofdm_x1 = | |
337 | min((u32)ranges->auto_corr_max_ofdm_x1, val); | |
338 | ||
339 | val = data->auto_corr_ofdm_mrc_x1 + AUTO_CORR_STEP_OFDM; | |
340 | data->auto_corr_ofdm_mrc_x1 = | |
341 | min((u32)ranges->auto_corr_max_ofdm_mrc_x1, val); | |
342 | } | |
343 | ||
344 | /* Else if we got fewer than desired, increase sensitivity */ | |
345 | else if (false_alarms < min_false_alarms) { | |
346 | ||
58de00a4 | 347 | D_CALIB("norm FA %u < min FA %u\n", |
be663ab6 WYG |
348 | false_alarms, min_false_alarms); |
349 | ||
350 | val = data->auto_corr_ofdm - AUTO_CORR_STEP_OFDM; | |
351 | data->auto_corr_ofdm = | |
352 | max((u32)ranges->auto_corr_min_ofdm, val); | |
353 | ||
354 | val = data->auto_corr_ofdm_mrc - AUTO_CORR_STEP_OFDM; | |
355 | data->auto_corr_ofdm_mrc = | |
356 | max((u32)ranges->auto_corr_min_ofdm_mrc, val); | |
357 | ||
358 | val = data->auto_corr_ofdm_x1 - AUTO_CORR_STEP_OFDM; | |
359 | data->auto_corr_ofdm_x1 = | |
360 | max((u32)ranges->auto_corr_min_ofdm_x1, val); | |
361 | ||
362 | val = data->auto_corr_ofdm_mrc_x1 - AUTO_CORR_STEP_OFDM; | |
363 | data->auto_corr_ofdm_mrc_x1 = | |
364 | max((u32)ranges->auto_corr_min_ofdm_mrc_x1, val); | |
365 | } else { | |
58de00a4 | 366 | D_CALIB("min FA %u < norm FA %u < max FA %u OK\n", |
be663ab6 WYG |
367 | min_false_alarms, false_alarms, max_false_alarms); |
368 | } | |
369 | return 0; | |
370 | } | |
371 | ||
46bc8d4b | 372 | static void il4965_prepare_legacy_sensitivity_tbl(struct il_priv *il, |
e2ebc833 | 373 | struct il_sensitivity_data *data, |
be663ab6 WYG |
374 | __le16 *tbl) |
375 | { | |
2d09b062 | 376 | tbl[HD_AUTO_CORR32_X4_TH_ADD_MIN_IDX] = |
be663ab6 | 377 | cpu_to_le16((u16)data->auto_corr_ofdm); |
2d09b062 | 378 | tbl[HD_AUTO_CORR32_X4_TH_ADD_MIN_MRC_IDX] = |
be663ab6 | 379 | cpu_to_le16((u16)data->auto_corr_ofdm_mrc); |
2d09b062 | 380 | tbl[HD_AUTO_CORR32_X1_TH_ADD_MIN_IDX] = |
be663ab6 | 381 | cpu_to_le16((u16)data->auto_corr_ofdm_x1); |
2d09b062 | 382 | tbl[HD_AUTO_CORR32_X1_TH_ADD_MIN_MRC_IDX] = |
be663ab6 WYG |
383 | cpu_to_le16((u16)data->auto_corr_ofdm_mrc_x1); |
384 | ||
2d09b062 | 385 | tbl[HD_AUTO_CORR40_X4_TH_ADD_MIN_IDX] = |
be663ab6 | 386 | cpu_to_le16((u16)data->auto_corr_cck); |
2d09b062 | 387 | tbl[HD_AUTO_CORR40_X4_TH_ADD_MIN_MRC_IDX] = |
be663ab6 WYG |
388 | cpu_to_le16((u16)data->auto_corr_cck_mrc); |
389 | ||
2d09b062 | 390 | tbl[HD_MIN_ENERGY_CCK_DET_IDX] = |
be663ab6 | 391 | cpu_to_le16((u16)data->nrg_th_cck); |
2d09b062 | 392 | tbl[HD_MIN_ENERGY_OFDM_DET_IDX] = |
be663ab6 WYG |
393 | cpu_to_le16((u16)data->nrg_th_ofdm); |
394 | ||
2d09b062 | 395 | tbl[HD_BARKER_CORR_TH_ADD_MIN_IDX] = |
be663ab6 | 396 | cpu_to_le16(data->barker_corr_th_min); |
2d09b062 | 397 | tbl[HD_BARKER_CORR_TH_ADD_MIN_MRC_IDX] = |
be663ab6 | 398 | cpu_to_le16(data->barker_corr_th_min_mrc); |
2d09b062 | 399 | tbl[HD_OFDM_ENERGY_TH_IN_IDX] = |
be663ab6 WYG |
400 | cpu_to_le16(data->nrg_th_cca); |
401 | ||
58de00a4 | 402 | D_CALIB("ofdm: ac %u mrc %u x1 %u mrc_x1 %u thresh %u\n", |
be663ab6 WYG |
403 | data->auto_corr_ofdm, data->auto_corr_ofdm_mrc, |
404 | data->auto_corr_ofdm_x1, data->auto_corr_ofdm_mrc_x1, | |
405 | data->nrg_th_ofdm); | |
406 | ||
58de00a4 | 407 | D_CALIB("cck: ac %u mrc %u thresh %u\n", |
be663ab6 WYG |
408 | data->auto_corr_cck, data->auto_corr_cck_mrc, |
409 | data->nrg_th_cck); | |
410 | } | |
411 | ||
4d69c752 | 412 | /* Prepare a C_SENSITIVITY, send to uCode if values have changed */ |
46bc8d4b | 413 | static int il4965_sensitivity_write(struct il_priv *il) |
be663ab6 | 414 | { |
e2ebc833 SG |
415 | struct il_sensitivity_cmd cmd; |
416 | struct il_sensitivity_data *data = NULL; | |
417 | struct il_host_cmd cmd_out = { | |
4d69c752 | 418 | .id = C_SENSITIVITY, |
e2ebc833 | 419 | .len = sizeof(struct il_sensitivity_cmd), |
be663ab6 WYG |
420 | .flags = CMD_ASYNC, |
421 | .data = &cmd, | |
422 | }; | |
423 | ||
46bc8d4b | 424 | data = &(il->sensitivity_data); |
be663ab6 WYG |
425 | |
426 | memset(&cmd, 0, sizeof(cmd)); | |
427 | ||
46bc8d4b | 428 | il4965_prepare_legacy_sensitivity_tbl(il, data, &cmd.table[0]); |
be663ab6 WYG |
429 | |
430 | /* Update uCode's "work" table, and copy it to DSP */ | |
4d69c752 | 431 | cmd.control = C_SENSITIVITY_CONTROL_WORK_TBL; |
be663ab6 WYG |
432 | |
433 | /* Don't send command to uCode if nothing has changed */ | |
46bc8d4b | 434 | if (!memcmp(&cmd.table[0], &(il->sensitivity_tbl[0]), |
3b98c7f4 | 435 | sizeof(u16)*HD_TBL_SIZE)) { |
4d69c752 | 436 | D_CALIB("No change in C_SENSITIVITY\n"); |
be663ab6 WYG |
437 | return 0; |
438 | } | |
439 | ||
440 | /* Copy table for comparison next time */ | |
46bc8d4b | 441 | memcpy(&(il->sensitivity_tbl[0]), &(cmd.table[0]), |
3b98c7f4 | 442 | sizeof(u16)*HD_TBL_SIZE); |
be663ab6 | 443 | |
46bc8d4b | 444 | return il_send_cmd(il, &cmd_out); |
be663ab6 WYG |
445 | } |
446 | ||
46bc8d4b | 447 | void il4965_init_sensitivity(struct il_priv *il) |
be663ab6 WYG |
448 | { |
449 | int ret = 0; | |
450 | int i; | |
e2ebc833 | 451 | struct il_sensitivity_data *data = NULL; |
46bc8d4b | 452 | const struct il_sensitivity_ranges *ranges = il->hw_params.sens; |
be663ab6 | 453 | |
46bc8d4b | 454 | if (il->disable_sens_cal) |
be663ab6 WYG |
455 | return; |
456 | ||
58de00a4 | 457 | D_CALIB("Start il4965_init_sensitivity\n"); |
be663ab6 WYG |
458 | |
459 | /* Clear driver's sensitivity algo data */ | |
46bc8d4b | 460 | data = &(il->sensitivity_data); |
be663ab6 WYG |
461 | |
462 | if (ranges == NULL) | |
463 | return; | |
464 | ||
e2ebc833 | 465 | memset(data, 0, sizeof(struct il_sensitivity_data)); |
be663ab6 WYG |
466 | |
467 | data->num_in_cck_no_fa = 0; | |
e2ebc833 SG |
468 | data->nrg_curr_state = IL_FA_TOO_MANY; |
469 | data->nrg_prev_state = IL_FA_TOO_MANY; | |
be663ab6 WYG |
470 | data->nrg_silence_ref = 0; |
471 | data->nrg_silence_idx = 0; | |
472 | data->nrg_energy_idx = 0; | |
473 | ||
474 | for (i = 0; i < 10; i++) | |
475 | data->nrg_value[i] = 0; | |
476 | ||
477 | for (i = 0; i < NRG_NUM_PREV_STAT_L; i++) | |
478 | data->nrg_silence_rssi[i] = 0; | |
479 | ||
480 | data->auto_corr_ofdm = ranges->auto_corr_min_ofdm; | |
481 | data->auto_corr_ofdm_mrc = ranges->auto_corr_min_ofdm_mrc; | |
482 | data->auto_corr_ofdm_x1 = ranges->auto_corr_min_ofdm_x1; | |
483 | data->auto_corr_ofdm_mrc_x1 = ranges->auto_corr_min_ofdm_mrc_x1; | |
484 | data->auto_corr_cck = AUTO_CORR_CCK_MIN_VAL_DEF; | |
485 | data->auto_corr_cck_mrc = ranges->auto_corr_min_cck_mrc; | |
486 | data->nrg_th_cck = ranges->nrg_th_cck; | |
487 | data->nrg_th_ofdm = ranges->nrg_th_ofdm; | |
488 | data->barker_corr_th_min = ranges->barker_corr_th_min; | |
489 | data->barker_corr_th_min_mrc = ranges->barker_corr_th_min_mrc; | |
490 | data->nrg_th_cca = ranges->nrg_th_cca; | |
491 | ||
492 | data->last_bad_plcp_cnt_ofdm = 0; | |
493 | data->last_fa_cnt_ofdm = 0; | |
494 | data->last_bad_plcp_cnt_cck = 0; | |
495 | data->last_fa_cnt_cck = 0; | |
496 | ||
46bc8d4b | 497 | ret |= il4965_sensitivity_write(il); |
58de00a4 | 498 | D_CALIB("<<return 0x%X\n", ret); |
be663ab6 WYG |
499 | } |
500 | ||
46bc8d4b | 501 | void il4965_sensitivity_calibration(struct il_priv *il, void *resp) |
be663ab6 WYG |
502 | { |
503 | u32 rx_enable_time; | |
504 | u32 fa_cck; | |
505 | u32 fa_ofdm; | |
506 | u32 bad_plcp_cck; | |
507 | u32 bad_plcp_ofdm; | |
508 | u32 norm_fa_ofdm; | |
509 | u32 norm_fa_cck; | |
e2ebc833 | 510 | struct il_sensitivity_data *data = NULL; |
ebf0d90d SG |
511 | struct stats_rx_non_phy *rx_info; |
512 | struct stats_rx_phy *ofdm, *cck; | |
be663ab6 | 513 | unsigned long flags; |
ebf0d90d | 514 | struct stats_general_data statis; |
be663ab6 | 515 | |
46bc8d4b | 516 | if (il->disable_sens_cal) |
be663ab6 WYG |
517 | return; |
518 | ||
46bc8d4b | 519 | data = &(il->sensitivity_data); |
be663ab6 | 520 | |
46bc8d4b | 521 | if (!il_is_any_associated(il)) { |
58de00a4 | 522 | D_CALIB("<< - not associated\n"); |
be663ab6 WYG |
523 | return; |
524 | } | |
525 | ||
46bc8d4b | 526 | spin_lock_irqsave(&il->lock, flags); |
be663ab6 | 527 | |
ebf0d90d SG |
528 | rx_info = &(((struct il_notif_stats *)resp)->rx.general); |
529 | ofdm = &(((struct il_notif_stats *)resp)->rx.ofdm); | |
530 | cck = &(((struct il_notif_stats *)resp)->rx.cck); | |
be663ab6 WYG |
531 | |
532 | if (rx_info->interference_data_flag != INTERFERENCE_DATA_AVAILABLE) { | |
58de00a4 | 533 | D_CALIB("<< invalid data.\n"); |
46bc8d4b | 534 | spin_unlock_irqrestore(&il->lock, flags); |
be663ab6 WYG |
535 | return; |
536 | } | |
537 | ||
538 | /* Extract Statistics: */ | |
539 | rx_enable_time = le32_to_cpu(rx_info->channel_load); | |
540 | fa_cck = le32_to_cpu(cck->false_alarm_cnt); | |
541 | fa_ofdm = le32_to_cpu(ofdm->false_alarm_cnt); | |
542 | bad_plcp_cck = le32_to_cpu(cck->plcp_err); | |
543 | bad_plcp_ofdm = le32_to_cpu(ofdm->plcp_err); | |
544 | ||
545 | statis.beacon_silence_rssi_a = | |
546 | le32_to_cpu(rx_info->beacon_silence_rssi_a); | |
547 | statis.beacon_silence_rssi_b = | |
548 | le32_to_cpu(rx_info->beacon_silence_rssi_b); | |
549 | statis.beacon_silence_rssi_c = | |
550 | le32_to_cpu(rx_info->beacon_silence_rssi_c); | |
551 | statis.beacon_energy_a = | |
552 | le32_to_cpu(rx_info->beacon_energy_a); | |
553 | statis.beacon_energy_b = | |
554 | le32_to_cpu(rx_info->beacon_energy_b); | |
555 | statis.beacon_energy_c = | |
556 | le32_to_cpu(rx_info->beacon_energy_c); | |
557 | ||
46bc8d4b | 558 | spin_unlock_irqrestore(&il->lock, flags); |
be663ab6 | 559 | |
58de00a4 | 560 | D_CALIB("rx_enable_time = %u usecs\n", rx_enable_time); |
be663ab6 WYG |
561 | |
562 | if (!rx_enable_time) { | |
58de00a4 | 563 | D_CALIB("<< RX Enable Time == 0!\n"); |
be663ab6 WYG |
564 | return; |
565 | } | |
566 | ||
ebf0d90d | 567 | /* These stats increase monotonically, and do not reset |
be663ab6 | 568 | * at each beacon. Calculate difference from last value, or just |
ebf0d90d | 569 | * use the new stats value if it has reset or wrapped around. */ |
be663ab6 WYG |
570 | if (data->last_bad_plcp_cnt_cck > bad_plcp_cck) |
571 | data->last_bad_plcp_cnt_cck = bad_plcp_cck; | |
572 | else { | |
573 | bad_plcp_cck -= data->last_bad_plcp_cnt_cck; | |
574 | data->last_bad_plcp_cnt_cck += bad_plcp_cck; | |
575 | } | |
576 | ||
577 | if (data->last_bad_plcp_cnt_ofdm > bad_plcp_ofdm) | |
578 | data->last_bad_plcp_cnt_ofdm = bad_plcp_ofdm; | |
579 | else { | |
580 | bad_plcp_ofdm -= data->last_bad_plcp_cnt_ofdm; | |
581 | data->last_bad_plcp_cnt_ofdm += bad_plcp_ofdm; | |
582 | } | |
583 | ||
584 | if (data->last_fa_cnt_ofdm > fa_ofdm) | |
585 | data->last_fa_cnt_ofdm = fa_ofdm; | |
586 | else { | |
587 | fa_ofdm -= data->last_fa_cnt_ofdm; | |
588 | data->last_fa_cnt_ofdm += fa_ofdm; | |
589 | } | |
590 | ||
591 | if (data->last_fa_cnt_cck > fa_cck) | |
592 | data->last_fa_cnt_cck = fa_cck; | |
593 | else { | |
594 | fa_cck -= data->last_fa_cnt_cck; | |
595 | data->last_fa_cnt_cck += fa_cck; | |
596 | } | |
597 | ||
598 | /* Total aborted signal locks */ | |
599 | norm_fa_ofdm = fa_ofdm + bad_plcp_ofdm; | |
600 | norm_fa_cck = fa_cck + bad_plcp_cck; | |
601 | ||
58de00a4 | 602 | D_CALIB( |
be663ab6 WYG |
603 | "cck: fa %u badp %u ofdm: fa %u badp %u\n", fa_cck, |
604 | bad_plcp_cck, fa_ofdm, bad_plcp_ofdm); | |
605 | ||
46bc8d4b SG |
606 | il4965_sens_auto_corr_ofdm(il, norm_fa_ofdm, rx_enable_time); |
607 | il4965_sens_energy_cck(il, norm_fa_cck, rx_enable_time, &statis); | |
be663ab6 | 608 | |
46bc8d4b | 609 | il4965_sensitivity_write(il); |
be663ab6 WYG |
610 | } |
611 | ||
e2ebc833 | 612 | static inline u8 il4965_find_first_chain(u8 mask) |
be663ab6 WYG |
613 | { |
614 | if (mask & ANT_A) | |
615 | return CHAIN_A; | |
616 | if (mask & ANT_B) | |
617 | return CHAIN_B; | |
618 | return CHAIN_C; | |
619 | } | |
620 | ||
621 | /** | |
622 | * Run disconnected antenna algorithm to find out which antennas are | |
623 | * disconnected. | |
624 | */ | |
625 | static void | |
46bc8d4b | 626 | il4965_find_disconn_antenna(struct il_priv *il, u32* average_sig, |
e2ebc833 | 627 | struct il_chain_noise_data *data) |
be663ab6 WYG |
628 | { |
629 | u32 active_chains = 0; | |
630 | u32 max_average_sig; | |
631 | u16 max_average_sig_antenna_i; | |
632 | u8 num_tx_chains; | |
633 | u8 first_chain; | |
634 | u16 i = 0; | |
635 | ||
636 | average_sig[0] = data->chain_signal_a / | |
46bc8d4b | 637 | il->cfg->base_params->chain_noise_num_beacons; |
be663ab6 | 638 | average_sig[1] = data->chain_signal_b / |
46bc8d4b | 639 | il->cfg->base_params->chain_noise_num_beacons; |
be663ab6 | 640 | average_sig[2] = data->chain_signal_c / |
46bc8d4b | 641 | il->cfg->base_params->chain_noise_num_beacons; |
be663ab6 WYG |
642 | |
643 | if (average_sig[0] >= average_sig[1]) { | |
644 | max_average_sig = average_sig[0]; | |
645 | max_average_sig_antenna_i = 0; | |
646 | active_chains = (1 << max_average_sig_antenna_i); | |
647 | } else { | |
648 | max_average_sig = average_sig[1]; | |
649 | max_average_sig_antenna_i = 1; | |
650 | active_chains = (1 << max_average_sig_antenna_i); | |
651 | } | |
652 | ||
653 | if (average_sig[2] >= max_average_sig) { | |
654 | max_average_sig = average_sig[2]; | |
655 | max_average_sig_antenna_i = 2; | |
656 | active_chains = (1 << max_average_sig_antenna_i); | |
657 | } | |
658 | ||
58de00a4 | 659 | D_CALIB("average_sig: a %d b %d c %d\n", |
be663ab6 | 660 | average_sig[0], average_sig[1], average_sig[2]); |
58de00a4 | 661 | D_CALIB("max_average_sig = %d, antenna %d\n", |
be663ab6 WYG |
662 | max_average_sig, max_average_sig_antenna_i); |
663 | ||
664 | /* Compare signal strengths for all 3 receivers. */ | |
665 | for (i = 0; i < NUM_RX_CHAINS; i++) { | |
666 | if (i != max_average_sig_antenna_i) { | |
667 | s32 rssi_delta = (max_average_sig - average_sig[i]); | |
668 | ||
669 | /* If signal is very weak, compared with | |
670 | * strongest, mark it as disconnected. */ | |
671 | if (rssi_delta > MAXIMUM_ALLOWED_PATHLOSS) | |
672 | data->disconn_array[i] = 1; | |
673 | else | |
674 | active_chains |= (1 << i); | |
58de00a4 | 675 | D_CALIB("i = %d rssiDelta = %d " |
be663ab6 WYG |
676 | "disconn_array[i] = %d\n", |
677 | i, rssi_delta, data->disconn_array[i]); | |
678 | } | |
679 | } | |
680 | ||
681 | /* | |
682 | * The above algorithm sometimes fails when the ucode | |
683 | * reports 0 for all chains. It's not clear why that | |
684 | * happens to start with, but it is then causing trouble | |
685 | * because this can make us enable more chains than the | |
686 | * hardware really has. | |
687 | * | |
688 | * To be safe, simply mask out any chains that we know | |
689 | * are not on the device. | |
690 | */ | |
46bc8d4b | 691 | active_chains &= il->hw_params.valid_rx_ant; |
be663ab6 WYG |
692 | |
693 | num_tx_chains = 0; | |
694 | for (i = 0; i < NUM_RX_CHAINS; i++) { | |
695 | /* loops on all the bits of | |
46bc8d4b | 696 | * il->hw_setting.valid_tx_ant */ |
be663ab6 | 697 | u8 ant_msk = (1 << i); |
46bc8d4b | 698 | if (!(il->hw_params.valid_tx_ant & ant_msk)) |
be663ab6 WYG |
699 | continue; |
700 | ||
701 | num_tx_chains++; | |
702 | if (data->disconn_array[i] == 0) | |
703 | /* there is a Tx antenna connected */ | |
704 | break; | |
46bc8d4b | 705 | if (num_tx_chains == il->hw_params.tx_chains_num && |
be663ab6 WYG |
706 | data->disconn_array[i]) { |
707 | /* | |
708 | * If all chains are disconnected | |
709 | * connect the first valid tx chain | |
710 | */ | |
711 | first_chain = | |
46bc8d4b | 712 | il4965_find_first_chain(il->cfg->valid_tx_ant); |
be663ab6 WYG |
713 | data->disconn_array[first_chain] = 0; |
714 | active_chains |= BIT(first_chain); | |
58de00a4 | 715 | D_CALIB( |
85ee7a1d | 716 | "All Tx chains are disconnected W/A - declare %d as connected\n", |
be663ab6 WYG |
717 | first_chain); |
718 | break; | |
719 | } | |
720 | } | |
721 | ||
46bc8d4b SG |
722 | if (active_chains != il->hw_params.valid_rx_ant && |
723 | active_chains != il->chain_noise_data.active_chains) | |
58de00a4 | 724 | D_CALIB( |
be663ab6 WYG |
725 | "Detected that not all antennas are connected! " |
726 | "Connected: %#x, valid: %#x.\n", | |
46bc8d4b | 727 | active_chains, il->hw_params.valid_rx_ant); |
be663ab6 WYG |
728 | |
729 | /* Save for use within RXON, TX, SCAN commands, etc. */ | |
730 | data->active_chains = active_chains; | |
58de00a4 | 731 | D_CALIB("active_chains (bitwise) = 0x%x\n", |
be663ab6 WYG |
732 | active_chains); |
733 | } | |
734 | ||
46bc8d4b | 735 | static void il4965_gain_computation(struct il_priv *il, |
be663ab6 WYG |
736 | u32 *average_noise, |
737 | u16 min_average_noise_antenna_i, | |
738 | u32 min_average_noise, | |
739 | u8 default_chain) | |
740 | { | |
741 | int i, ret; | |
46bc8d4b | 742 | struct il_chain_noise_data *data = &il->chain_noise_data; |
be663ab6 WYG |
743 | |
744 | data->delta_gain_code[min_average_noise_antenna_i] = 0; | |
745 | ||
746 | for (i = default_chain; i < NUM_RX_CHAINS; i++) { | |
747 | s32 delta_g = 0; | |
748 | ||
232913b5 SG |
749 | if (!data->disconn_array[i] && |
750 | data->delta_gain_code[i] == CHAIN_NOISE_DELTA_GAIN_INIT_VAL) { | |
be663ab6 WYG |
751 | delta_g = average_noise[i] - min_average_noise; |
752 | data->delta_gain_code[i] = (u8)((delta_g * 10) / 15); | |
753 | data->delta_gain_code[i] = | |
754 | min(data->delta_gain_code[i], | |
755 | (u8) CHAIN_NOISE_MAX_DELTA_GAIN_CODE); | |
756 | ||
757 | data->delta_gain_code[i] = | |
758 | (data->delta_gain_code[i] | (1 << 2)); | |
759 | } else { | |
760 | data->delta_gain_code[i] = 0; | |
761 | } | |
762 | } | |
58de00a4 | 763 | D_CALIB("delta_gain_codes: a %d b %d c %d\n", |
be663ab6 WYG |
764 | data->delta_gain_code[0], |
765 | data->delta_gain_code[1], | |
766 | data->delta_gain_code[2]); | |
767 | ||
768 | /* Differential gain gets sent to uCode only once */ | |
769 | if (!data->radio_write) { | |
e2ebc833 | 770 | struct il_calib_diff_gain_cmd cmd; |
be663ab6 WYG |
771 | data->radio_write = 1; |
772 | ||
773 | memset(&cmd, 0, sizeof(cmd)); | |
e2ebc833 | 774 | cmd.hdr.op_code = IL_PHY_CALIBRATE_DIFF_GAIN_CMD; |
be663ab6 WYG |
775 | cmd.diff_gain_a = data->delta_gain_code[0]; |
776 | cmd.diff_gain_b = data->delta_gain_code[1]; | |
777 | cmd.diff_gain_c = data->delta_gain_code[2]; | |
4d69c752 | 778 | ret = il_send_cmd_pdu(il, C_PHY_CALIBRATION, |
be663ab6 WYG |
779 | sizeof(cmd), &cmd); |
780 | if (ret) | |
58de00a4 | 781 | D_CALIB("fail sending cmd " |
4d69c752 | 782 | "C_PHY_CALIBRATION\n"); |
be663ab6 WYG |
783 | |
784 | /* TODO we might want recalculate | |
785 | * rx_chain in rxon cmd */ | |
786 | ||
787 | /* Mark so we run this algo only once! */ | |
e2ebc833 | 788 | data->state = IL_CHAIN_NOISE_CALIBRATED; |
be663ab6 WYG |
789 | } |
790 | } | |
791 | ||
792 | ||
793 | ||
794 | /* | |
ebf0d90d | 795 | * Accumulate 16 beacons of signal and noise stats for each of |
be663ab6 WYG |
796 | * 3 receivers/antennas/rx-chains, then figure out: |
797 | * 1) Which antennas are connected. | |
798 | * 2) Differential rx gain settings to balance the 3 receivers. | |
799 | */ | |
46bc8d4b | 800 | void il4965_chain_noise_calibration(struct il_priv *il, void *stat_resp) |
be663ab6 | 801 | { |
e2ebc833 | 802 | struct il_chain_noise_data *data = NULL; |
be663ab6 WYG |
803 | |
804 | u32 chain_noise_a; | |
805 | u32 chain_noise_b; | |
806 | u32 chain_noise_c; | |
807 | u32 chain_sig_a; | |
808 | u32 chain_sig_b; | |
809 | u32 chain_sig_c; | |
810 | u32 average_sig[NUM_RX_CHAINS] = {INITIALIZATION_VALUE}; | |
811 | u32 average_noise[NUM_RX_CHAINS] = {INITIALIZATION_VALUE}; | |
812 | u32 min_average_noise = MIN_AVERAGE_NOISE_MAX_VALUE; | |
813 | u16 min_average_noise_antenna_i = INITIALIZATION_VALUE; | |
814 | u16 i = 0; | |
815 | u16 rxon_chnum = INITIALIZATION_VALUE; | |
816 | u16 stat_chnum = INITIALIZATION_VALUE; | |
817 | u8 rxon_band24; | |
818 | u8 stat_band24; | |
819 | unsigned long flags; | |
ebf0d90d | 820 | struct stats_rx_non_phy *rx_info; |
be663ab6 | 821 | |
7c2cde2e | 822 | struct il_rxon_context *ctx = &il->ctx; |
be663ab6 | 823 | |
46bc8d4b | 824 | if (il->disable_chain_noise_cal) |
be663ab6 WYG |
825 | return; |
826 | ||
46bc8d4b | 827 | data = &(il->chain_noise_data); |
be663ab6 WYG |
828 | |
829 | /* | |
830 | * Accumulate just the first "chain_noise_num_beacons" after | |
831 | * the first association, then we're done forever. | |
832 | */ | |
e2ebc833 SG |
833 | if (data->state != IL_CHAIN_NOISE_ACCUMULATE) { |
834 | if (data->state == IL_CHAIN_NOISE_ALIVE) | |
58de00a4 | 835 | D_CALIB("Wait for noise calib reset\n"); |
be663ab6 WYG |
836 | return; |
837 | } | |
838 | ||
46bc8d4b | 839 | spin_lock_irqsave(&il->lock, flags); |
be663ab6 | 840 | |
ebf0d90d | 841 | rx_info = &(((struct il_notif_stats *)stat_resp)-> |
be663ab6 WYG |
842 | rx.general); |
843 | ||
844 | if (rx_info->interference_data_flag != INTERFERENCE_DATA_AVAILABLE) { | |
58de00a4 | 845 | D_CALIB(" << Interference data unavailable\n"); |
46bc8d4b | 846 | spin_unlock_irqrestore(&il->lock, flags); |
be663ab6 WYG |
847 | return; |
848 | } | |
849 | ||
850 | rxon_band24 = !!(ctx->staging.flags & RXON_FLG_BAND_24G_MSK); | |
851 | rxon_chnum = le16_to_cpu(ctx->staging.channel); | |
852 | ||
ebf0d90d | 853 | stat_band24 = !!(((struct il_notif_stats *) |
be663ab6 | 854 | stat_resp)->flag & |
db7746f7 | 855 | STATS_REPLY_FLG_BAND_24G_MSK); |
ebf0d90d | 856 | stat_chnum = le32_to_cpu(((struct il_notif_stats *) |
be663ab6 WYG |
857 | stat_resp)->flag) >> 16; |
858 | ||
859 | /* Make sure we accumulate data for just the associated channel | |
860 | * (even if scanning). */ | |
232913b5 | 861 | if (rxon_chnum != stat_chnum || rxon_band24 != stat_band24) { |
58de00a4 | 862 | D_CALIB("Stats not from chan=%d, band24=%d\n", |
be663ab6 | 863 | rxon_chnum, rxon_band24); |
46bc8d4b | 864 | spin_unlock_irqrestore(&il->lock, flags); |
be663ab6 WYG |
865 | return; |
866 | } | |
867 | ||
868 | /* | |
ebf0d90d | 869 | * Accumulate beacon stats values across |
be663ab6 WYG |
870 | * "chain_noise_num_beacons" |
871 | */ | |
872 | chain_noise_a = le32_to_cpu(rx_info->beacon_silence_rssi_a) & | |
873 | IN_BAND_FILTER; | |
874 | chain_noise_b = le32_to_cpu(rx_info->beacon_silence_rssi_b) & | |
875 | IN_BAND_FILTER; | |
876 | chain_noise_c = le32_to_cpu(rx_info->beacon_silence_rssi_c) & | |
877 | IN_BAND_FILTER; | |
878 | ||
879 | chain_sig_a = le32_to_cpu(rx_info->beacon_rssi_a) & IN_BAND_FILTER; | |
880 | chain_sig_b = le32_to_cpu(rx_info->beacon_rssi_b) & IN_BAND_FILTER; | |
881 | chain_sig_c = le32_to_cpu(rx_info->beacon_rssi_c) & IN_BAND_FILTER; | |
882 | ||
46bc8d4b | 883 | spin_unlock_irqrestore(&il->lock, flags); |
be663ab6 WYG |
884 | |
885 | data->beacon_count++; | |
886 | ||
887 | data->chain_noise_a = (chain_noise_a + data->chain_noise_a); | |
888 | data->chain_noise_b = (chain_noise_b + data->chain_noise_b); | |
889 | data->chain_noise_c = (chain_noise_c + data->chain_noise_c); | |
890 | ||
891 | data->chain_signal_a = (chain_sig_a + data->chain_signal_a); | |
892 | data->chain_signal_b = (chain_sig_b + data->chain_signal_b); | |
893 | data->chain_signal_c = (chain_sig_c + data->chain_signal_c); | |
894 | ||
58de00a4 | 895 | D_CALIB("chan=%d, band24=%d, beacon=%d\n", |
be663ab6 | 896 | rxon_chnum, rxon_band24, data->beacon_count); |
58de00a4 | 897 | D_CALIB("chain_sig: a %d b %d c %d\n", |
be663ab6 | 898 | chain_sig_a, chain_sig_b, chain_sig_c); |
58de00a4 | 899 | D_CALIB("chain_noise: a %d b %d c %d\n", |
be663ab6 WYG |
900 | chain_noise_a, chain_noise_b, chain_noise_c); |
901 | ||
902 | /* If this is the "chain_noise_num_beacons", determine: | |
903 | * 1) Disconnected antennas (using signal strengths) | |
904 | * 2) Differential gain (using silence noise) to balance receivers */ | |
905 | if (data->beacon_count != | |
46bc8d4b | 906 | il->cfg->base_params->chain_noise_num_beacons) |
be663ab6 WYG |
907 | return; |
908 | ||
909 | /* Analyze signal for disconnected antenna */ | |
46bc8d4b | 910 | il4965_find_disconn_antenna(il, average_sig, data); |
be663ab6 WYG |
911 | |
912 | /* Analyze noise for rx balance */ | |
913 | average_noise[0] = data->chain_noise_a / | |
46bc8d4b | 914 | il->cfg->base_params->chain_noise_num_beacons; |
be663ab6 | 915 | average_noise[1] = data->chain_noise_b / |
46bc8d4b | 916 | il->cfg->base_params->chain_noise_num_beacons; |
be663ab6 | 917 | average_noise[2] = data->chain_noise_c / |
46bc8d4b | 918 | il->cfg->base_params->chain_noise_num_beacons; |
be663ab6 WYG |
919 | |
920 | for (i = 0; i < NUM_RX_CHAINS; i++) { | |
232913b5 SG |
921 | if (!data->disconn_array[i] && |
922 | average_noise[i] <= min_average_noise) { | |
be663ab6 WYG |
923 | /* This means that chain i is active and has |
924 | * lower noise values so far: */ | |
925 | min_average_noise = average_noise[i]; | |
926 | min_average_noise_antenna_i = i; | |
927 | } | |
928 | } | |
929 | ||
58de00a4 | 930 | D_CALIB("average_noise: a %d b %d c %d\n", |
be663ab6 WYG |
931 | average_noise[0], average_noise[1], |
932 | average_noise[2]); | |
933 | ||
58de00a4 | 934 | D_CALIB("min_average_noise = %d, antenna %d\n", |
be663ab6 WYG |
935 | min_average_noise, min_average_noise_antenna_i); |
936 | ||
46bc8d4b | 937 | il4965_gain_computation(il, average_noise, |
be663ab6 | 938 | min_average_noise_antenna_i, min_average_noise, |
46bc8d4b | 939 | il4965_find_first_chain(il->cfg->valid_rx_ant)); |
be663ab6 WYG |
940 | |
941 | /* Some power changes may have been made during the calibration. | |
942 | * Update and commit the RXON | |
943 | */ | |
46bc8d4b SG |
944 | if (il->cfg->ops->lib->update_chain_flags) |
945 | il->cfg->ops->lib->update_chain_flags(il); | |
be663ab6 | 946 | |
e2ebc833 | 947 | data->state = IL_CHAIN_NOISE_DONE; |
46bc8d4b | 948 | il_power_update_mode(il, false); |
be663ab6 WYG |
949 | } |
950 | ||
46bc8d4b | 951 | void il4965_reset_run_time_calib(struct il_priv *il) |
be663ab6 WYG |
952 | { |
953 | int i; | |
46bc8d4b | 954 | memset(&(il->sensitivity_data), 0, |
e2ebc833 | 955 | sizeof(struct il_sensitivity_data)); |
46bc8d4b | 956 | memset(&(il->chain_noise_data), 0, |
e2ebc833 | 957 | sizeof(struct il_chain_noise_data)); |
be663ab6 | 958 | for (i = 0; i < NUM_RX_CHAINS; i++) |
46bc8d4b | 959 | il->chain_noise_data.delta_gain_code[i] = |
be663ab6 WYG |
960 | CHAIN_NOISE_DELTA_GAIN_INIT_VAL; |
961 | ||
ebf0d90d | 962 | /* Ask for stats now, the uCode will send notification |
be663ab6 | 963 | * periodically after association */ |
ebf0d90d | 964 | il_send_stats_request(il, CMD_ASYNC, true); |
be663ab6 | 965 | } |