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f0832f13 EG |
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 | * | |
1f447808 | 8 | * Copyright(c) 2008 - 2010 Intel Corporation. All rights reserved. |
f0832f13 EG |
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: | |
759ef89f | 28 | * Intel Linux Wireless <ilw@linux.intel.com> |
f0832f13 EG |
29 | * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 |
30 | * | |
31 | * BSD LICENSE | |
32 | * | |
1f447808 | 33 | * Copyright(c) 2005 - 2010 Intel Corporation. All rights reserved. |
f0832f13 EG |
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 | ||
5a0e3ad6 | 63 | #include <linux/slab.h> |
f0832f13 EG |
64 | #include <net/mac80211.h> |
65 | ||
3e0d4cb1 | 66 | #include "iwl-dev.h" |
f0832f13 EG |
67 | #include "iwl-core.h" |
68 | #include "iwl-calib.h" | |
f0832f13 | 69 | |
6e21f2c1 TW |
70 | /***************************************************************************** |
71 | * INIT calibrations framework | |
72 | *****************************************************************************/ | |
73 | ||
34c22cf9 WT |
74 | struct statistics_general_data { |
75 | u32 beacon_silence_rssi_a; | |
76 | u32 beacon_silence_rssi_b; | |
77 | u32 beacon_silence_rssi_c; | |
78 | u32 beacon_energy_a; | |
79 | u32 beacon_energy_b; | |
80 | u32 beacon_energy_c; | |
81 | }; | |
82 | ||
be5d56ed | 83 | int iwl_send_calib_results(struct iwl_priv *priv) |
6e21f2c1 TW |
84 | { |
85 | int ret = 0; | |
86 | int i = 0; | |
87 | ||
88 | struct iwl_host_cmd hcmd = { | |
89 | .id = REPLY_PHY_CALIBRATION_CMD, | |
c2acea8e | 90 | .flags = CMD_SIZE_HUGE, |
6e21f2c1 TW |
91 | }; |
92 | ||
be5d56ed TW |
93 | for (i = 0; i < IWL_CALIB_MAX; i++) { |
94 | if ((BIT(i) & priv->hw_params.calib_init_cfg) && | |
95 | priv->calib_results[i].buf) { | |
6e21f2c1 TW |
96 | hcmd.len = priv->calib_results[i].buf_len; |
97 | hcmd.data = priv->calib_results[i].buf; | |
98 | ret = iwl_send_cmd_sync(priv, &hcmd); | |
99 | if (ret) | |
100 | goto err; | |
101 | } | |
be5d56ed | 102 | } |
6e21f2c1 TW |
103 | |
104 | return 0; | |
105 | err: | |
15b1687c | 106 | IWL_ERR(priv, "Error %d iteration %d\n", ret, i); |
6e21f2c1 TW |
107 | return ret; |
108 | } | |
109 | EXPORT_SYMBOL(iwl_send_calib_results); | |
110 | ||
111 | int iwl_calib_set(struct iwl_calib_result *res, const u8 *buf, int len) | |
112 | { | |
113 | if (res->buf_len != len) { | |
114 | kfree(res->buf); | |
115 | res->buf = kzalloc(len, GFP_ATOMIC); | |
116 | } | |
117 | if (unlikely(res->buf == NULL)) | |
118 | return -ENOMEM; | |
119 | ||
120 | res->buf_len = len; | |
121 | memcpy(res->buf, buf, len); | |
122 | return 0; | |
123 | } | |
124 | EXPORT_SYMBOL(iwl_calib_set); | |
125 | ||
126 | void iwl_calib_free_results(struct iwl_priv *priv) | |
127 | { | |
128 | int i; | |
129 | ||
130 | for (i = 0; i < IWL_CALIB_MAX; i++) { | |
131 | kfree(priv->calib_results[i].buf); | |
132 | priv->calib_results[i].buf = NULL; | |
133 | priv->calib_results[i].buf_len = 0; | |
134 | } | |
135 | } | |
89f186a8 | 136 | EXPORT_SYMBOL(iwl_calib_free_results); |
6e21f2c1 TW |
137 | |
138 | /***************************************************************************** | |
139 | * RUNTIME calibrations framework | |
140 | *****************************************************************************/ | |
141 | ||
f0832f13 EG |
142 | /* "false alarms" are signals that our DSP tries to lock onto, |
143 | * but then determines that they are either noise, or transmissions | |
144 | * from a distant wireless network (also "noise", really) that get | |
145 | * "stepped on" by stronger transmissions within our own network. | |
146 | * This algorithm attempts to set a sensitivity level that is high | |
147 | * enough to receive all of our own network traffic, but not so | |
148 | * high that our DSP gets too busy trying to lock onto non-network | |
149 | * activity/noise. */ | |
150 | static int iwl_sens_energy_cck(struct iwl_priv *priv, | |
151 | u32 norm_fa, | |
152 | u32 rx_enable_time, | |
153 | struct statistics_general_data *rx_info) | |
154 | { | |
155 | u32 max_nrg_cck = 0; | |
156 | int i = 0; | |
157 | u8 max_silence_rssi = 0; | |
158 | u32 silence_ref = 0; | |
159 | u8 silence_rssi_a = 0; | |
160 | u8 silence_rssi_b = 0; | |
161 | u8 silence_rssi_c = 0; | |
162 | u32 val; | |
163 | ||
164 | /* "false_alarms" values below are cross-multiplications to assess the | |
165 | * numbers of false alarms within the measured period of actual Rx | |
166 | * (Rx is off when we're txing), vs the min/max expected false alarms | |
167 | * (some should be expected if rx is sensitive enough) in a | |
168 | * hypothetical listening period of 200 time units (TU), 204.8 msec: | |
169 | * | |
170 | * MIN_FA/fixed-time < false_alarms/actual-rx-time < MAX_FA/beacon-time | |
171 | * | |
172 | * */ | |
173 | u32 false_alarms = norm_fa * 200 * 1024; | |
174 | u32 max_false_alarms = MAX_FA_CCK * rx_enable_time; | |
175 | u32 min_false_alarms = MIN_FA_CCK * rx_enable_time; | |
176 | struct iwl_sensitivity_data *data = NULL; | |
177 | const struct iwl_sensitivity_ranges *ranges = priv->hw_params.sens; | |
178 | ||
179 | data = &(priv->sensitivity_data); | |
180 | ||
181 | data->nrg_auto_corr_silence_diff = 0; | |
182 | ||
183 | /* Find max silence rssi among all 3 receivers. | |
184 | * This is background noise, which may include transmissions from other | |
185 | * networks, measured during silence before our network's beacon */ | |
186 | silence_rssi_a = (u8)((rx_info->beacon_silence_rssi_a & | |
187 | ALL_BAND_FILTER) >> 8); | |
188 | silence_rssi_b = (u8)((rx_info->beacon_silence_rssi_b & | |
189 | ALL_BAND_FILTER) >> 8); | |
190 | silence_rssi_c = (u8)((rx_info->beacon_silence_rssi_c & | |
191 | ALL_BAND_FILTER) >> 8); | |
192 | ||
193 | val = max(silence_rssi_b, silence_rssi_c); | |
194 | max_silence_rssi = max(silence_rssi_a, (u8) val); | |
195 | ||
196 | /* Store silence rssi in 20-beacon history table */ | |
197 | data->nrg_silence_rssi[data->nrg_silence_idx] = max_silence_rssi; | |
198 | data->nrg_silence_idx++; | |
199 | if (data->nrg_silence_idx >= NRG_NUM_PREV_STAT_L) | |
200 | data->nrg_silence_idx = 0; | |
201 | ||
202 | /* Find max silence rssi across 20 beacon history */ | |
203 | for (i = 0; i < NRG_NUM_PREV_STAT_L; i++) { | |
204 | val = data->nrg_silence_rssi[i]; | |
205 | silence_ref = max(silence_ref, val); | |
206 | } | |
e1623446 | 207 | IWL_DEBUG_CALIB(priv, "silence a %u, b %u, c %u, 20-bcn max %u\n", |
f0832f13 EG |
208 | silence_rssi_a, silence_rssi_b, silence_rssi_c, |
209 | silence_ref); | |
210 | ||
211 | /* Find max rx energy (min value!) among all 3 receivers, | |
212 | * measured during beacon frame. | |
213 | * Save it in 10-beacon history table. */ | |
214 | i = data->nrg_energy_idx; | |
215 | val = min(rx_info->beacon_energy_b, rx_info->beacon_energy_c); | |
216 | data->nrg_value[i] = min(rx_info->beacon_energy_a, val); | |
217 | ||
218 | data->nrg_energy_idx++; | |
219 | if (data->nrg_energy_idx >= 10) | |
220 | data->nrg_energy_idx = 0; | |
221 | ||
222 | /* Find min rx energy (max value) across 10 beacon history. | |
223 | * This is the minimum signal level that we want to receive well. | |
224 | * Add backoff (margin so we don't miss slightly lower energy frames). | |
225 | * This establishes an upper bound (min value) for energy threshold. */ | |
226 | max_nrg_cck = data->nrg_value[0]; | |
227 | for (i = 1; i < 10; i++) | |
228 | max_nrg_cck = (u32) max(max_nrg_cck, (data->nrg_value[i])); | |
229 | max_nrg_cck += 6; | |
230 | ||
e1623446 | 231 | IWL_DEBUG_CALIB(priv, "rx energy a %u, b %u, c %u, 10-bcn max/min %u\n", |
f0832f13 EG |
232 | rx_info->beacon_energy_a, rx_info->beacon_energy_b, |
233 | rx_info->beacon_energy_c, max_nrg_cck - 6); | |
234 | ||
235 | /* Count number of consecutive beacons with fewer-than-desired | |
236 | * false alarms. */ | |
237 | if (false_alarms < min_false_alarms) | |
238 | data->num_in_cck_no_fa++; | |
239 | else | |
240 | data->num_in_cck_no_fa = 0; | |
e1623446 | 241 | IWL_DEBUG_CALIB(priv, "consecutive bcns with few false alarms = %u\n", |
f0832f13 EG |
242 | data->num_in_cck_no_fa); |
243 | ||
244 | /* If we got too many false alarms this time, reduce sensitivity */ | |
245 | if ((false_alarms > max_false_alarms) && | |
246 | (data->auto_corr_cck > AUTO_CORR_MAX_TH_CCK)) { | |
e1623446 | 247 | IWL_DEBUG_CALIB(priv, "norm FA %u > max FA %u\n", |
f0832f13 | 248 | false_alarms, max_false_alarms); |
e1623446 | 249 | IWL_DEBUG_CALIB(priv, "... reducing sensitivity\n"); |
f0832f13 EG |
250 | data->nrg_curr_state = IWL_FA_TOO_MANY; |
251 | /* Store for "fewer than desired" on later beacon */ | |
252 | data->nrg_silence_ref = silence_ref; | |
253 | ||
254 | /* increase energy threshold (reduce nrg value) | |
255 | * to decrease sensitivity */ | |
fe6efb4b | 256 | data->nrg_th_cck = data->nrg_th_cck - NRG_STEP_CCK; |
f0832f13 EG |
257 | /* Else if we got fewer than desired, increase sensitivity */ |
258 | } else if (false_alarms < min_false_alarms) { | |
259 | data->nrg_curr_state = IWL_FA_TOO_FEW; | |
260 | ||
261 | /* Compare silence level with silence level for most recent | |
262 | * healthy number or too many false alarms */ | |
263 | data->nrg_auto_corr_silence_diff = (s32)data->nrg_silence_ref - | |
264 | (s32)silence_ref; | |
265 | ||
e1623446 | 266 | IWL_DEBUG_CALIB(priv, "norm FA %u < min FA %u, silence diff %d\n", |
f0832f13 EG |
267 | false_alarms, min_false_alarms, |
268 | data->nrg_auto_corr_silence_diff); | |
269 | ||
270 | /* Increase value to increase sensitivity, but only if: | |
271 | * 1a) previous beacon did *not* have *too many* false alarms | |
272 | * 1b) AND there's a significant difference in Rx levels | |
273 | * from a previous beacon with too many, or healthy # FAs | |
274 | * OR 2) We've seen a lot of beacons (100) with too few | |
275 | * false alarms */ | |
276 | if ((data->nrg_prev_state != IWL_FA_TOO_MANY) && | |
277 | ((data->nrg_auto_corr_silence_diff > NRG_DIFF) || | |
278 | (data->num_in_cck_no_fa > MAX_NUMBER_CCK_NO_FA))) { | |
279 | ||
e1623446 | 280 | IWL_DEBUG_CALIB(priv, "... increasing sensitivity\n"); |
f0832f13 EG |
281 | /* Increase nrg value to increase sensitivity */ |
282 | val = data->nrg_th_cck + NRG_STEP_CCK; | |
283 | data->nrg_th_cck = min((u32)ranges->min_nrg_cck, val); | |
284 | } else { | |
e1623446 | 285 | IWL_DEBUG_CALIB(priv, "... but not changing sensitivity\n"); |
f0832f13 EG |
286 | } |
287 | ||
288 | /* Else we got a healthy number of false alarms, keep status quo */ | |
289 | } else { | |
e1623446 | 290 | IWL_DEBUG_CALIB(priv, " FA in safe zone\n"); |
f0832f13 EG |
291 | data->nrg_curr_state = IWL_FA_GOOD_RANGE; |
292 | ||
293 | /* Store for use in "fewer than desired" with later beacon */ | |
294 | data->nrg_silence_ref = silence_ref; | |
295 | ||
296 | /* If previous beacon had too many false alarms, | |
297 | * give it some extra margin by reducing sensitivity again | |
298 | * (but don't go below measured energy of desired Rx) */ | |
299 | if (IWL_FA_TOO_MANY == data->nrg_prev_state) { | |
e1623446 | 300 | IWL_DEBUG_CALIB(priv, "... increasing margin\n"); |
f0832f13 EG |
301 | if (data->nrg_th_cck > (max_nrg_cck + NRG_MARGIN)) |
302 | data->nrg_th_cck -= NRG_MARGIN; | |
303 | else | |
304 | data->nrg_th_cck = max_nrg_cck; | |
305 | } | |
306 | } | |
307 | ||
308 | /* Make sure the energy threshold does not go above the measured | |
309 | * energy of the desired Rx signals (reduced by backoff margin), | |
310 | * or else we might start missing Rx frames. | |
311 | * Lower value is higher energy, so we use max()! | |
312 | */ | |
313 | data->nrg_th_cck = max(max_nrg_cck, data->nrg_th_cck); | |
e1623446 | 314 | IWL_DEBUG_CALIB(priv, "new nrg_th_cck %u\n", data->nrg_th_cck); |
f0832f13 EG |
315 | |
316 | data->nrg_prev_state = data->nrg_curr_state; | |
317 | ||
318 | /* Auto-correlation CCK algorithm */ | |
319 | if (false_alarms > min_false_alarms) { | |
320 | ||
321 | /* increase auto_corr values to decrease sensitivity | |
322 | * so the DSP won't be disturbed by the noise | |
323 | */ | |
324 | if (data->auto_corr_cck < AUTO_CORR_MAX_TH_CCK) | |
325 | data->auto_corr_cck = AUTO_CORR_MAX_TH_CCK + 1; | |
326 | else { | |
327 | val = data->auto_corr_cck + AUTO_CORR_STEP_CCK; | |
328 | data->auto_corr_cck = | |
329 | min((u32)ranges->auto_corr_max_cck, val); | |
330 | } | |
331 | val = data->auto_corr_cck_mrc + AUTO_CORR_STEP_CCK; | |
332 | data->auto_corr_cck_mrc = | |
333 | min((u32)ranges->auto_corr_max_cck_mrc, val); | |
334 | } else if ((false_alarms < min_false_alarms) && | |
335 | ((data->nrg_auto_corr_silence_diff > NRG_DIFF) || | |
336 | (data->num_in_cck_no_fa > MAX_NUMBER_CCK_NO_FA))) { | |
337 | ||
338 | /* Decrease auto_corr values to increase sensitivity */ | |
339 | val = data->auto_corr_cck - AUTO_CORR_STEP_CCK; | |
340 | data->auto_corr_cck = | |
341 | max((u32)ranges->auto_corr_min_cck, val); | |
342 | val = data->auto_corr_cck_mrc - AUTO_CORR_STEP_CCK; | |
343 | data->auto_corr_cck_mrc = | |
344 | max((u32)ranges->auto_corr_min_cck_mrc, val); | |
345 | } | |
346 | ||
347 | return 0; | |
348 | } | |
349 | ||
350 | ||
351 | static int iwl_sens_auto_corr_ofdm(struct iwl_priv *priv, | |
352 | u32 norm_fa, | |
353 | u32 rx_enable_time) | |
354 | { | |
355 | u32 val; | |
356 | u32 false_alarms = norm_fa * 200 * 1024; | |
357 | u32 max_false_alarms = MAX_FA_OFDM * rx_enable_time; | |
358 | u32 min_false_alarms = MIN_FA_OFDM * rx_enable_time; | |
359 | struct iwl_sensitivity_data *data = NULL; | |
360 | const struct iwl_sensitivity_ranges *ranges = priv->hw_params.sens; | |
361 | ||
362 | data = &(priv->sensitivity_data); | |
363 | ||
364 | /* If we got too many false alarms this time, reduce sensitivity */ | |
365 | if (false_alarms > max_false_alarms) { | |
366 | ||
e1623446 | 367 | IWL_DEBUG_CALIB(priv, "norm FA %u > max FA %u)\n", |
f0832f13 EG |
368 | false_alarms, max_false_alarms); |
369 | ||
370 | val = data->auto_corr_ofdm + AUTO_CORR_STEP_OFDM; | |
371 | data->auto_corr_ofdm = | |
372 | min((u32)ranges->auto_corr_max_ofdm, val); | |
373 | ||
374 | val = data->auto_corr_ofdm_mrc + AUTO_CORR_STEP_OFDM; | |
375 | data->auto_corr_ofdm_mrc = | |
376 | min((u32)ranges->auto_corr_max_ofdm_mrc, val); | |
377 | ||
378 | val = data->auto_corr_ofdm_x1 + AUTO_CORR_STEP_OFDM; | |
379 | data->auto_corr_ofdm_x1 = | |
380 | min((u32)ranges->auto_corr_max_ofdm_x1, val); | |
381 | ||
382 | val = data->auto_corr_ofdm_mrc_x1 + AUTO_CORR_STEP_OFDM; | |
383 | data->auto_corr_ofdm_mrc_x1 = | |
384 | min((u32)ranges->auto_corr_max_ofdm_mrc_x1, val); | |
385 | } | |
386 | ||
387 | /* Else if we got fewer than desired, increase sensitivity */ | |
388 | else if (false_alarms < min_false_alarms) { | |
389 | ||
e1623446 | 390 | IWL_DEBUG_CALIB(priv, "norm FA %u < min FA %u\n", |
f0832f13 EG |
391 | false_alarms, min_false_alarms); |
392 | ||
393 | val = data->auto_corr_ofdm - AUTO_CORR_STEP_OFDM; | |
394 | data->auto_corr_ofdm = | |
395 | max((u32)ranges->auto_corr_min_ofdm, val); | |
396 | ||
397 | val = data->auto_corr_ofdm_mrc - AUTO_CORR_STEP_OFDM; | |
398 | data->auto_corr_ofdm_mrc = | |
399 | max((u32)ranges->auto_corr_min_ofdm_mrc, val); | |
400 | ||
401 | val = data->auto_corr_ofdm_x1 - AUTO_CORR_STEP_OFDM; | |
402 | data->auto_corr_ofdm_x1 = | |
403 | max((u32)ranges->auto_corr_min_ofdm_x1, val); | |
404 | ||
405 | val = data->auto_corr_ofdm_mrc_x1 - AUTO_CORR_STEP_OFDM; | |
406 | data->auto_corr_ofdm_mrc_x1 = | |
407 | max((u32)ranges->auto_corr_min_ofdm_mrc_x1, val); | |
408 | } else { | |
e1623446 | 409 | IWL_DEBUG_CALIB(priv, "min FA %u < norm FA %u < max FA %u OK\n", |
f0832f13 EG |
410 | min_false_alarms, false_alarms, max_false_alarms); |
411 | } | |
412 | return 0; | |
413 | } | |
414 | ||
415 | /* Prepare a SENSITIVITY_CMD, send to uCode if values have changed */ | |
416 | static int iwl_sensitivity_write(struct iwl_priv *priv) | |
417 | { | |
f0832f13 EG |
418 | struct iwl_sensitivity_cmd cmd ; |
419 | struct iwl_sensitivity_data *data = NULL; | |
420 | struct iwl_host_cmd cmd_out = { | |
421 | .id = SENSITIVITY_CMD, | |
422 | .len = sizeof(struct iwl_sensitivity_cmd), | |
c2acea8e | 423 | .flags = CMD_ASYNC, |
f0832f13 EG |
424 | .data = &cmd, |
425 | }; | |
426 | ||
427 | data = &(priv->sensitivity_data); | |
428 | ||
429 | memset(&cmd, 0, sizeof(cmd)); | |
430 | ||
431 | cmd.table[HD_AUTO_CORR32_X4_TH_ADD_MIN_INDEX] = | |
432 | cpu_to_le16((u16)data->auto_corr_ofdm); | |
433 | cmd.table[HD_AUTO_CORR32_X4_TH_ADD_MIN_MRC_INDEX] = | |
434 | cpu_to_le16((u16)data->auto_corr_ofdm_mrc); | |
435 | cmd.table[HD_AUTO_CORR32_X1_TH_ADD_MIN_INDEX] = | |
436 | cpu_to_le16((u16)data->auto_corr_ofdm_x1); | |
437 | cmd.table[HD_AUTO_CORR32_X1_TH_ADD_MIN_MRC_INDEX] = | |
438 | cpu_to_le16((u16)data->auto_corr_ofdm_mrc_x1); | |
439 | ||
440 | cmd.table[HD_AUTO_CORR40_X4_TH_ADD_MIN_INDEX] = | |
441 | cpu_to_le16((u16)data->auto_corr_cck); | |
442 | cmd.table[HD_AUTO_CORR40_X4_TH_ADD_MIN_MRC_INDEX] = | |
443 | cpu_to_le16((u16)data->auto_corr_cck_mrc); | |
444 | ||
445 | cmd.table[HD_MIN_ENERGY_CCK_DET_INDEX] = | |
446 | cpu_to_le16((u16)data->nrg_th_cck); | |
447 | cmd.table[HD_MIN_ENERGY_OFDM_DET_INDEX] = | |
448 | cpu_to_le16((u16)data->nrg_th_ofdm); | |
449 | ||
450 | cmd.table[HD_BARKER_CORR_TH_ADD_MIN_INDEX] = | |
55036d66 | 451 | cpu_to_le16(data->barker_corr_th_min); |
f0832f13 | 452 | cmd.table[HD_BARKER_CORR_TH_ADD_MIN_MRC_INDEX] = |
55036d66 | 453 | cpu_to_le16(data->barker_corr_th_min_mrc); |
f0832f13 | 454 | cmd.table[HD_OFDM_ENERGY_TH_IN_INDEX] = |
55036d66 | 455 | cpu_to_le16(data->nrg_th_cca); |
f0832f13 | 456 | |
e1623446 | 457 | IWL_DEBUG_CALIB(priv, "ofdm: ac %u mrc %u x1 %u mrc_x1 %u thresh %u\n", |
f0832f13 EG |
458 | data->auto_corr_ofdm, data->auto_corr_ofdm_mrc, |
459 | data->auto_corr_ofdm_x1, data->auto_corr_ofdm_mrc_x1, | |
460 | data->nrg_th_ofdm); | |
461 | ||
e1623446 | 462 | IWL_DEBUG_CALIB(priv, "cck: ac %u mrc %u thresh %u\n", |
f0832f13 EG |
463 | data->auto_corr_cck, data->auto_corr_cck_mrc, |
464 | data->nrg_th_cck); | |
465 | ||
466 | /* Update uCode's "work" table, and copy it to DSP */ | |
467 | cmd.control = SENSITIVITY_CMD_CONTROL_WORK_TABLE; | |
468 | ||
469 | /* Don't send command to uCode if nothing has changed */ | |
470 | if (!memcmp(&cmd.table[0], &(priv->sensitivity_tbl[0]), | |
471 | sizeof(u16)*HD_TABLE_SIZE)) { | |
e1623446 | 472 | IWL_DEBUG_CALIB(priv, "No change in SENSITIVITY_CMD\n"); |
f0832f13 EG |
473 | return 0; |
474 | } | |
475 | ||
476 | /* Copy table for comparison next time */ | |
477 | memcpy(&(priv->sensitivity_tbl[0]), &(cmd.table[0]), | |
478 | sizeof(u16)*HD_TABLE_SIZE); | |
479 | ||
4309af27 | 480 | return iwl_send_cmd(priv, &cmd_out); |
f0832f13 EG |
481 | } |
482 | ||
483 | void iwl_init_sensitivity(struct iwl_priv *priv) | |
484 | { | |
485 | int ret = 0; | |
486 | int i; | |
487 | struct iwl_sensitivity_data *data = NULL; | |
488 | const struct iwl_sensitivity_ranges *ranges = priv->hw_params.sens; | |
489 | ||
445c2dff TW |
490 | if (priv->disable_sens_cal) |
491 | return; | |
492 | ||
e1623446 | 493 | IWL_DEBUG_CALIB(priv, "Start iwl_init_sensitivity\n"); |
f0832f13 EG |
494 | |
495 | /* Clear driver's sensitivity algo data */ | |
496 | data = &(priv->sensitivity_data); | |
497 | ||
498 | if (ranges == NULL) | |
f0832f13 EG |
499 | return; |
500 | ||
501 | memset(data, 0, sizeof(struct iwl_sensitivity_data)); | |
502 | ||
503 | data->num_in_cck_no_fa = 0; | |
504 | data->nrg_curr_state = IWL_FA_TOO_MANY; | |
505 | data->nrg_prev_state = IWL_FA_TOO_MANY; | |
506 | data->nrg_silence_ref = 0; | |
507 | data->nrg_silence_idx = 0; | |
508 | data->nrg_energy_idx = 0; | |
509 | ||
510 | for (i = 0; i < 10; i++) | |
511 | data->nrg_value[i] = 0; | |
512 | ||
513 | for (i = 0; i < NRG_NUM_PREV_STAT_L; i++) | |
514 | data->nrg_silence_rssi[i] = 0; | |
515 | ||
f3a2a424 | 516 | data->auto_corr_ofdm = ranges->auto_corr_min_ofdm; |
f0832f13 EG |
517 | data->auto_corr_ofdm_mrc = ranges->auto_corr_min_ofdm_mrc; |
518 | data->auto_corr_ofdm_x1 = ranges->auto_corr_min_ofdm_x1; | |
519 | data->auto_corr_ofdm_mrc_x1 = ranges->auto_corr_min_ofdm_mrc_x1; | |
520 | data->auto_corr_cck = AUTO_CORR_CCK_MIN_VAL_DEF; | |
521 | data->auto_corr_cck_mrc = ranges->auto_corr_min_cck_mrc; | |
522 | data->nrg_th_cck = ranges->nrg_th_cck; | |
523 | data->nrg_th_ofdm = ranges->nrg_th_ofdm; | |
55036d66 WYG |
524 | data->barker_corr_th_min = ranges->barker_corr_th_min; |
525 | data->barker_corr_th_min_mrc = ranges->barker_corr_th_min_mrc; | |
526 | data->nrg_th_cca = ranges->nrg_th_cca; | |
f0832f13 EG |
527 | |
528 | data->last_bad_plcp_cnt_ofdm = 0; | |
529 | data->last_fa_cnt_ofdm = 0; | |
530 | data->last_bad_plcp_cnt_cck = 0; | |
531 | data->last_fa_cnt_cck = 0; | |
532 | ||
533 | ret |= iwl_sensitivity_write(priv); | |
e1623446 | 534 | IWL_DEBUG_CALIB(priv, "<<return 0x%X\n", ret); |
f0832f13 EG |
535 | } |
536 | EXPORT_SYMBOL(iwl_init_sensitivity); | |
537 | ||
538 | void iwl_sensitivity_calibration(struct iwl_priv *priv, | |
8f91aecb | 539 | struct iwl_notif_statistics *resp) |
f0832f13 EG |
540 | { |
541 | u32 rx_enable_time; | |
542 | u32 fa_cck; | |
543 | u32 fa_ofdm; | |
544 | u32 bad_plcp_cck; | |
545 | u32 bad_plcp_ofdm; | |
546 | u32 norm_fa_ofdm; | |
547 | u32 norm_fa_cck; | |
548 | struct iwl_sensitivity_data *data = NULL; | |
549 | struct statistics_rx_non_phy *rx_info = &(resp->rx.general); | |
550 | struct statistics_rx *statistics = &(resp->rx); | |
551 | unsigned long flags; | |
552 | struct statistics_general_data statis; | |
553 | ||
445c2dff TW |
554 | if (priv->disable_sens_cal) |
555 | return; | |
556 | ||
f0832f13 EG |
557 | data = &(priv->sensitivity_data); |
558 | ||
559 | if (!iwl_is_associated(priv)) { | |
e1623446 | 560 | IWL_DEBUG_CALIB(priv, "<< - not associated\n"); |
f0832f13 EG |
561 | return; |
562 | } | |
563 | ||
564 | spin_lock_irqsave(&priv->lock, flags); | |
565 | if (rx_info->interference_data_flag != INTERFERENCE_DATA_AVAILABLE) { | |
e1623446 | 566 | IWL_DEBUG_CALIB(priv, "<< invalid data.\n"); |
f0832f13 EG |
567 | spin_unlock_irqrestore(&priv->lock, flags); |
568 | return; | |
569 | } | |
570 | ||
571 | /* Extract Statistics: */ | |
572 | rx_enable_time = le32_to_cpu(rx_info->channel_load); | |
573 | fa_cck = le32_to_cpu(statistics->cck.false_alarm_cnt); | |
574 | fa_ofdm = le32_to_cpu(statistics->ofdm.false_alarm_cnt); | |
575 | bad_plcp_cck = le32_to_cpu(statistics->cck.plcp_err); | |
576 | bad_plcp_ofdm = le32_to_cpu(statistics->ofdm.plcp_err); | |
577 | ||
578 | statis.beacon_silence_rssi_a = | |
579 | le32_to_cpu(statistics->general.beacon_silence_rssi_a); | |
580 | statis.beacon_silence_rssi_b = | |
581 | le32_to_cpu(statistics->general.beacon_silence_rssi_b); | |
582 | statis.beacon_silence_rssi_c = | |
583 | le32_to_cpu(statistics->general.beacon_silence_rssi_c); | |
584 | statis.beacon_energy_a = | |
585 | le32_to_cpu(statistics->general.beacon_energy_a); | |
586 | statis.beacon_energy_b = | |
587 | le32_to_cpu(statistics->general.beacon_energy_b); | |
588 | statis.beacon_energy_c = | |
589 | le32_to_cpu(statistics->general.beacon_energy_c); | |
590 | ||
591 | spin_unlock_irqrestore(&priv->lock, flags); | |
592 | ||
e1623446 | 593 | IWL_DEBUG_CALIB(priv, "rx_enable_time = %u usecs\n", rx_enable_time); |
f0832f13 EG |
594 | |
595 | if (!rx_enable_time) { | |
e1623446 | 596 | IWL_DEBUG_CALIB(priv, "<< RX Enable Time == 0! \n"); |
f0832f13 EG |
597 | return; |
598 | } | |
599 | ||
600 | /* These statistics increase monotonically, and do not reset | |
601 | * at each beacon. Calculate difference from last value, or just | |
602 | * use the new statistics value if it has reset or wrapped around. */ | |
603 | if (data->last_bad_plcp_cnt_cck > bad_plcp_cck) | |
604 | data->last_bad_plcp_cnt_cck = bad_plcp_cck; | |
605 | else { | |
606 | bad_plcp_cck -= data->last_bad_plcp_cnt_cck; | |
607 | data->last_bad_plcp_cnt_cck += bad_plcp_cck; | |
608 | } | |
609 | ||
610 | if (data->last_bad_plcp_cnt_ofdm > bad_plcp_ofdm) | |
611 | data->last_bad_plcp_cnt_ofdm = bad_plcp_ofdm; | |
612 | else { | |
613 | bad_plcp_ofdm -= data->last_bad_plcp_cnt_ofdm; | |
614 | data->last_bad_plcp_cnt_ofdm += bad_plcp_ofdm; | |
615 | } | |
616 | ||
617 | if (data->last_fa_cnt_ofdm > fa_ofdm) | |
618 | data->last_fa_cnt_ofdm = fa_ofdm; | |
619 | else { | |
620 | fa_ofdm -= data->last_fa_cnt_ofdm; | |
621 | data->last_fa_cnt_ofdm += fa_ofdm; | |
622 | } | |
623 | ||
624 | if (data->last_fa_cnt_cck > fa_cck) | |
625 | data->last_fa_cnt_cck = fa_cck; | |
626 | else { | |
627 | fa_cck -= data->last_fa_cnt_cck; | |
628 | data->last_fa_cnt_cck += fa_cck; | |
629 | } | |
630 | ||
631 | /* Total aborted signal locks */ | |
632 | norm_fa_ofdm = fa_ofdm + bad_plcp_ofdm; | |
633 | norm_fa_cck = fa_cck + bad_plcp_cck; | |
634 | ||
e1623446 | 635 | IWL_DEBUG_CALIB(priv, "cck: fa %u badp %u ofdm: fa %u badp %u\n", fa_cck, |
f0832f13 EG |
636 | bad_plcp_cck, fa_ofdm, bad_plcp_ofdm); |
637 | ||
638 | iwl_sens_auto_corr_ofdm(priv, norm_fa_ofdm, rx_enable_time); | |
639 | iwl_sens_energy_cck(priv, norm_fa_cck, rx_enable_time, &statis); | |
640 | iwl_sensitivity_write(priv); | |
641 | ||
642 | return; | |
643 | } | |
644 | EXPORT_SYMBOL(iwl_sensitivity_calibration); | |
645 | ||
d8c07e7a WYG |
646 | static inline u8 find_first_chain(u8 mask) |
647 | { | |
648 | if (mask & ANT_A) | |
649 | return CHAIN_A; | |
650 | if (mask & ANT_B) | |
651 | return CHAIN_B; | |
652 | return CHAIN_C; | |
653 | } | |
654 | ||
f0832f13 EG |
655 | /* |
656 | * Accumulate 20 beacons of signal and noise statistics for each of | |
657 | * 3 receivers/antennas/rx-chains, then figure out: | |
658 | * 1) Which antennas are connected. | |
659 | * 2) Differential rx gain settings to balance the 3 receivers. | |
660 | */ | |
661 | void iwl_chain_noise_calibration(struct iwl_priv *priv, | |
8f91aecb | 662 | struct iwl_notif_statistics *stat_resp) |
f0832f13 EG |
663 | { |
664 | struct iwl_chain_noise_data *data = NULL; | |
665 | ||
666 | u32 chain_noise_a; | |
667 | u32 chain_noise_b; | |
668 | u32 chain_noise_c; | |
669 | u32 chain_sig_a; | |
670 | u32 chain_sig_b; | |
671 | u32 chain_sig_c; | |
672 | u32 average_sig[NUM_RX_CHAINS] = {INITIALIZATION_VALUE}; | |
673 | u32 average_noise[NUM_RX_CHAINS] = {INITIALIZATION_VALUE}; | |
674 | u32 max_average_sig; | |
675 | u16 max_average_sig_antenna_i; | |
676 | u32 min_average_noise = MIN_AVERAGE_NOISE_MAX_VALUE; | |
677 | u16 min_average_noise_antenna_i = INITIALIZATION_VALUE; | |
678 | u16 i = 0; | |
679 | u16 rxon_chnum = INITIALIZATION_VALUE; | |
680 | u16 stat_chnum = INITIALIZATION_VALUE; | |
681 | u8 rxon_band24; | |
682 | u8 stat_band24; | |
683 | u32 active_chains = 0; | |
684 | u8 num_tx_chains; | |
685 | unsigned long flags; | |
686 | struct statistics_rx_non_phy *rx_info = &(stat_resp->rx.general); | |
d8c07e7a | 687 | u8 first_chain; |
f0832f13 | 688 | |
445c2dff TW |
689 | if (priv->disable_chain_noise_cal) |
690 | return; | |
691 | ||
f0832f13 EG |
692 | data = &(priv->chain_noise_data); |
693 | ||
d8c07e7a WYG |
694 | /* |
695 | * Accumulate just the first "chain_noise_num_beacons" after | |
696 | * the first association, then we're done forever. | |
697 | */ | |
f0832f13 EG |
698 | if (data->state != IWL_CHAIN_NOISE_ACCUMULATE) { |
699 | if (data->state == IWL_CHAIN_NOISE_ALIVE) | |
e1623446 | 700 | IWL_DEBUG_CALIB(priv, "Wait for noise calib reset\n"); |
f0832f13 EG |
701 | return; |
702 | } | |
703 | ||
704 | spin_lock_irqsave(&priv->lock, flags); | |
705 | if (rx_info->interference_data_flag != INTERFERENCE_DATA_AVAILABLE) { | |
e1623446 | 706 | IWL_DEBUG_CALIB(priv, " << Interference data unavailable\n"); |
f0832f13 EG |
707 | spin_unlock_irqrestore(&priv->lock, flags); |
708 | return; | |
709 | } | |
710 | ||
711 | rxon_band24 = !!(priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK); | |
712 | rxon_chnum = le16_to_cpu(priv->staging_rxon.channel); | |
713 | stat_band24 = !!(stat_resp->flag & STATISTICS_REPLY_FLG_BAND_24G_MSK); | |
714 | stat_chnum = le32_to_cpu(stat_resp->flag) >> 16; | |
715 | ||
716 | /* Make sure we accumulate data for just the associated channel | |
717 | * (even if scanning). */ | |
718 | if ((rxon_chnum != stat_chnum) || (rxon_band24 != stat_band24)) { | |
e1623446 | 719 | IWL_DEBUG_CALIB(priv, "Stats not from chan=%d, band24=%d\n", |
f0832f13 EG |
720 | rxon_chnum, rxon_band24); |
721 | spin_unlock_irqrestore(&priv->lock, flags); | |
722 | return; | |
723 | } | |
724 | ||
d8c07e7a WYG |
725 | /* |
726 | * Accumulate beacon statistics values across | |
727 | * "chain_noise_num_beacons" | |
728 | */ | |
f0832f13 EG |
729 | chain_noise_a = le32_to_cpu(rx_info->beacon_silence_rssi_a) & |
730 | IN_BAND_FILTER; | |
731 | chain_noise_b = le32_to_cpu(rx_info->beacon_silence_rssi_b) & | |
732 | IN_BAND_FILTER; | |
733 | chain_noise_c = le32_to_cpu(rx_info->beacon_silence_rssi_c) & | |
734 | IN_BAND_FILTER; | |
735 | ||
736 | chain_sig_a = le32_to_cpu(rx_info->beacon_rssi_a) & IN_BAND_FILTER; | |
737 | chain_sig_b = le32_to_cpu(rx_info->beacon_rssi_b) & IN_BAND_FILTER; | |
738 | chain_sig_c = le32_to_cpu(rx_info->beacon_rssi_c) & IN_BAND_FILTER; | |
739 | ||
740 | spin_unlock_irqrestore(&priv->lock, flags); | |
741 | ||
742 | data->beacon_count++; | |
743 | ||
744 | data->chain_noise_a = (chain_noise_a + data->chain_noise_a); | |
745 | data->chain_noise_b = (chain_noise_b + data->chain_noise_b); | |
746 | data->chain_noise_c = (chain_noise_c + data->chain_noise_c); | |
747 | ||
748 | data->chain_signal_a = (chain_sig_a + data->chain_signal_a); | |
749 | data->chain_signal_b = (chain_sig_b + data->chain_signal_b); | |
750 | data->chain_signal_c = (chain_sig_c + data->chain_signal_c); | |
751 | ||
e1623446 | 752 | IWL_DEBUG_CALIB(priv, "chan=%d, band24=%d, beacon=%d\n", |
f0832f13 | 753 | rxon_chnum, rxon_band24, data->beacon_count); |
e1623446 | 754 | IWL_DEBUG_CALIB(priv, "chain_sig: a %d b %d c %d\n", |
f0832f13 | 755 | chain_sig_a, chain_sig_b, chain_sig_c); |
e1623446 | 756 | IWL_DEBUG_CALIB(priv, "chain_noise: a %d b %d c %d\n", |
f0832f13 EG |
757 | chain_noise_a, chain_noise_b, chain_noise_c); |
758 | ||
d8c07e7a | 759 | /* If this is the "chain_noise_num_beacons", determine: |
f0832f13 EG |
760 | * 1) Disconnected antennas (using signal strengths) |
761 | * 2) Differential gain (using silence noise) to balance receivers */ | |
d8c07e7a | 762 | if (data->beacon_count != priv->cfg->chain_noise_num_beacons) |
f0832f13 EG |
763 | return; |
764 | ||
765 | /* Analyze signal for disconnected antenna */ | |
d8c07e7a WYG |
766 | average_sig[0] = |
767 | (data->chain_signal_a) / priv->cfg->chain_noise_num_beacons; | |
768 | average_sig[1] = | |
769 | (data->chain_signal_b) / priv->cfg->chain_noise_num_beacons; | |
770 | average_sig[2] = | |
771 | (data->chain_signal_c) / priv->cfg->chain_noise_num_beacons; | |
f0832f13 EG |
772 | |
773 | if (average_sig[0] >= average_sig[1]) { | |
774 | max_average_sig = average_sig[0]; | |
775 | max_average_sig_antenna_i = 0; | |
776 | active_chains = (1 << max_average_sig_antenna_i); | |
777 | } else { | |
778 | max_average_sig = average_sig[1]; | |
779 | max_average_sig_antenna_i = 1; | |
780 | active_chains = (1 << max_average_sig_antenna_i); | |
781 | } | |
782 | ||
783 | if (average_sig[2] >= max_average_sig) { | |
784 | max_average_sig = average_sig[2]; | |
785 | max_average_sig_antenna_i = 2; | |
786 | active_chains = (1 << max_average_sig_antenna_i); | |
787 | } | |
788 | ||
e1623446 | 789 | IWL_DEBUG_CALIB(priv, "average_sig: a %d b %d c %d\n", |
f0832f13 | 790 | average_sig[0], average_sig[1], average_sig[2]); |
e1623446 | 791 | IWL_DEBUG_CALIB(priv, "max_average_sig = %d, antenna %d\n", |
f0832f13 EG |
792 | max_average_sig, max_average_sig_antenna_i); |
793 | ||
794 | /* Compare signal strengths for all 3 receivers. */ | |
795 | for (i = 0; i < NUM_RX_CHAINS; i++) { | |
796 | if (i != max_average_sig_antenna_i) { | |
797 | s32 rssi_delta = (max_average_sig - average_sig[i]); | |
798 | ||
799 | /* If signal is very weak, compared with | |
800 | * strongest, mark it as disconnected. */ | |
801 | if (rssi_delta > MAXIMUM_ALLOWED_PATHLOSS) | |
802 | data->disconn_array[i] = 1; | |
803 | else | |
804 | active_chains |= (1 << i); | |
e1623446 | 805 | IWL_DEBUG_CALIB(priv, "i = %d rssiDelta = %d " |
f0832f13 EG |
806 | "disconn_array[i] = %d\n", |
807 | i, rssi_delta, data->disconn_array[i]); | |
808 | } | |
809 | } | |
810 | ||
811 | num_tx_chains = 0; | |
812 | for (i = 0; i < NUM_RX_CHAINS; i++) { | |
813 | /* loops on all the bits of | |
814 | * priv->hw_setting.valid_tx_ant */ | |
815 | u8 ant_msk = (1 << i); | |
816 | if (!(priv->hw_params.valid_tx_ant & ant_msk)) | |
817 | continue; | |
818 | ||
819 | num_tx_chains++; | |
820 | if (data->disconn_array[i] == 0) | |
821 | /* there is a Tx antenna connected */ | |
822 | break; | |
823 | if (num_tx_chains == priv->hw_params.tx_chains_num && | |
d8c07e7a WYG |
824 | data->disconn_array[i]) { |
825 | /* | |
826 | * If all chains are disconnected | |
827 | * connect the first valid tx chain | |
828 | */ | |
829 | first_chain = | |
830 | find_first_chain(priv->cfg->valid_tx_ant); | |
831 | data->disconn_array[first_chain] = 0; | |
832 | active_chains |= BIT(first_chain); | |
833 | IWL_DEBUG_CALIB(priv, "All Tx chains are disconnected W/A - declare %d as connected\n", | |
834 | first_chain); | |
f0832f13 EG |
835 | break; |
836 | } | |
837 | } | |
838 | ||
04816448 GE |
839 | /* Save for use within RXON, TX, SCAN commands, etc. */ |
840 | priv->chain_noise_data.active_chains = active_chains; | |
e1623446 | 841 | IWL_DEBUG_CALIB(priv, "active_chains (bitwise) = 0x%x\n", |
f0832f13 EG |
842 | active_chains); |
843 | ||
f0832f13 | 844 | /* Analyze noise for rx balance */ |
d8c07e7a WYG |
845 | average_noise[0] = |
846 | ((data->chain_noise_a) / priv->cfg->chain_noise_num_beacons); | |
847 | average_noise[1] = | |
848 | ((data->chain_noise_b) / priv->cfg->chain_noise_num_beacons); | |
849 | average_noise[2] = | |
850 | ((data->chain_noise_c) / priv->cfg->chain_noise_num_beacons); | |
f0832f13 EG |
851 | |
852 | for (i = 0; i < NUM_RX_CHAINS; i++) { | |
853 | if (!(data->disconn_array[i]) && | |
854 | (average_noise[i] <= min_average_noise)) { | |
855 | /* This means that chain i is active and has | |
856 | * lower noise values so far: */ | |
857 | min_average_noise = average_noise[i]; | |
858 | min_average_noise_antenna_i = i; | |
859 | } | |
860 | } | |
861 | ||
e1623446 | 862 | IWL_DEBUG_CALIB(priv, "average_noise: a %d b %d c %d\n", |
f0832f13 EG |
863 | average_noise[0], average_noise[1], |
864 | average_noise[2]); | |
865 | ||
e1623446 | 866 | IWL_DEBUG_CALIB(priv, "min_average_noise = %d, antenna %d\n", |
f0832f13 EG |
867 | min_average_noise, min_average_noise_antenna_i); |
868 | ||
29f35c14 JS |
869 | if (priv->cfg->ops->utils->gain_computation) |
870 | priv->cfg->ops->utils->gain_computation(priv, average_noise, | |
d8c07e7a WYG |
871 | min_average_noise_antenna_i, min_average_noise, |
872 | find_first_chain(priv->cfg->valid_rx_ant)); | |
04816448 GE |
873 | |
874 | /* Some power changes may have been made during the calibration. | |
875 | * Update and commit the RXON | |
876 | */ | |
877 | if (priv->cfg->ops->lib->update_chain_flags) | |
878 | priv->cfg->ops->lib->update_chain_flags(priv); | |
879 | ||
880 | data->state = IWL_CHAIN_NOISE_DONE; | |
e312c24c | 881 | iwl_power_update_mode(priv, false); |
f0832f13 EG |
882 | } |
883 | EXPORT_SYMBOL(iwl_chain_noise_calibration); | |
884 | ||
4a4a9e81 TW |
885 | |
886 | void iwl_reset_run_time_calib(struct iwl_priv *priv) | |
887 | { | |
888 | int i; | |
889 | memset(&(priv->sensitivity_data), 0, | |
890 | sizeof(struct iwl_sensitivity_data)); | |
891 | memset(&(priv->chain_noise_data), 0, | |
892 | sizeof(struct iwl_chain_noise_data)); | |
893 | for (i = 0; i < NUM_RX_CHAINS; i++) | |
894 | priv->chain_noise_data.delta_gain_code[i] = | |
895 | CHAIN_NOISE_DELTA_GAIN_INIT_VAL; | |
896 | ||
897 | /* Ask for statistics now, the uCode will send notification | |
898 | * periodically after association */ | |
ef8d5529 | 899 | iwl_send_statistics_request(priv, CMD_ASYNC, true); |
4a4a9e81 TW |
900 | } |
901 | EXPORT_SYMBOL(iwl_reset_run_time_calib); | |
902 |