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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 | * | |
01f8162a | 8 | * Copyright(c) 2008 - 2009 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 | * | |
01f8162a | 33 | * Copyright(c) 2005 - 2009 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 | ||
f0832f13 EG |
63 | #include <net/mac80211.h> |
64 | ||
3e0d4cb1 | 65 | #include "iwl-dev.h" |
f0832f13 EG |
66 | #include "iwl-core.h" |
67 | #include "iwl-calib.h" | |
f0832f13 | 68 | |
6e21f2c1 TW |
69 | /***************************************************************************** |
70 | * INIT calibrations framework | |
71 | *****************************************************************************/ | |
72 | ||
34c22cf9 WT |
73 | struct statistics_general_data { |
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 | ||
be5d56ed | 82 | int iwl_send_calib_results(struct iwl_priv *priv) |
6e21f2c1 TW |
83 | { |
84 | int ret = 0; | |
85 | int i = 0; | |
86 | ||
87 | struct iwl_host_cmd hcmd = { | |
88 | .id = REPLY_PHY_CALIBRATION_CMD, | |
89 | .meta.flags = CMD_SIZE_HUGE, | |
90 | }; | |
91 | ||
be5d56ed TW |
92 | for (i = 0; i < IWL_CALIB_MAX; i++) { |
93 | if ((BIT(i) & priv->hw_params.calib_init_cfg) && | |
94 | priv->calib_results[i].buf) { | |
6e21f2c1 TW |
95 | hcmd.len = priv->calib_results[i].buf_len; |
96 | hcmd.data = priv->calib_results[i].buf; | |
97 | ret = iwl_send_cmd_sync(priv, &hcmd); | |
98 | if (ret) | |
99 | goto err; | |
100 | } | |
be5d56ed | 101 | } |
6e21f2c1 TW |
102 | |
103 | return 0; | |
104 | err: | |
15b1687c | 105 | IWL_ERR(priv, "Error %d iteration %d\n", ret, i); |
6e21f2c1 TW |
106 | return ret; |
107 | } | |
108 | EXPORT_SYMBOL(iwl_send_calib_results); | |
109 | ||
110 | int iwl_calib_set(struct iwl_calib_result *res, const u8 *buf, int len) | |
111 | { | |
112 | if (res->buf_len != len) { | |
113 | kfree(res->buf); | |
114 | res->buf = kzalloc(len, GFP_ATOMIC); | |
115 | } | |
116 | if (unlikely(res->buf == NULL)) | |
117 | return -ENOMEM; | |
118 | ||
119 | res->buf_len = len; | |
120 | memcpy(res->buf, buf, len); | |
121 | return 0; | |
122 | } | |
123 | EXPORT_SYMBOL(iwl_calib_set); | |
124 | ||
125 | void iwl_calib_free_results(struct iwl_priv *priv) | |
126 | { | |
127 | int i; | |
128 | ||
129 | for (i = 0; i < IWL_CALIB_MAX; i++) { | |
130 | kfree(priv->calib_results[i].buf); | |
131 | priv->calib_results[i].buf = NULL; | |
132 | priv->calib_results[i].buf_len = 0; | |
133 | } | |
134 | } | |
135 | ||
136 | /***************************************************************************** | |
137 | * RUNTIME calibrations framework | |
138 | *****************************************************************************/ | |
139 | ||
f0832f13 EG |
140 | /* "false alarms" are signals that our DSP tries to lock onto, |
141 | * but then determines that they are either noise, or transmissions | |
142 | * from a distant wireless network (also "noise", really) that get | |
143 | * "stepped on" by stronger transmissions within our own network. | |
144 | * This algorithm attempts to set a sensitivity level that is high | |
145 | * enough to receive all of our own network traffic, but not so | |
146 | * high that our DSP gets too busy trying to lock onto non-network | |
147 | * activity/noise. */ | |
148 | static int iwl_sens_energy_cck(struct iwl_priv *priv, | |
149 | u32 norm_fa, | |
150 | u32 rx_enable_time, | |
151 | struct statistics_general_data *rx_info) | |
152 | { | |
153 | u32 max_nrg_cck = 0; | |
154 | int i = 0; | |
155 | u8 max_silence_rssi = 0; | |
156 | u32 silence_ref = 0; | |
157 | u8 silence_rssi_a = 0; | |
158 | u8 silence_rssi_b = 0; | |
159 | u8 silence_rssi_c = 0; | |
160 | u32 val; | |
161 | ||
162 | /* "false_alarms" values below are cross-multiplications to assess the | |
163 | * numbers of false alarms within the measured period of actual Rx | |
164 | * (Rx is off when we're txing), vs the min/max expected false alarms | |
165 | * (some should be expected if rx is sensitive enough) in a | |
166 | * hypothetical listening period of 200 time units (TU), 204.8 msec: | |
167 | * | |
168 | * MIN_FA/fixed-time < false_alarms/actual-rx-time < MAX_FA/beacon-time | |
169 | * | |
170 | * */ | |
171 | u32 false_alarms = norm_fa * 200 * 1024; | |
172 | u32 max_false_alarms = MAX_FA_CCK * rx_enable_time; | |
173 | u32 min_false_alarms = MIN_FA_CCK * rx_enable_time; | |
174 | struct iwl_sensitivity_data *data = NULL; | |
175 | const struct iwl_sensitivity_ranges *ranges = priv->hw_params.sens; | |
176 | ||
177 | data = &(priv->sensitivity_data); | |
178 | ||
179 | data->nrg_auto_corr_silence_diff = 0; | |
180 | ||
181 | /* Find max silence rssi among all 3 receivers. | |
182 | * This is background noise, which may include transmissions from other | |
183 | * networks, measured during silence before our network's beacon */ | |
184 | silence_rssi_a = (u8)((rx_info->beacon_silence_rssi_a & | |
185 | ALL_BAND_FILTER) >> 8); | |
186 | silence_rssi_b = (u8)((rx_info->beacon_silence_rssi_b & | |
187 | ALL_BAND_FILTER) >> 8); | |
188 | silence_rssi_c = (u8)((rx_info->beacon_silence_rssi_c & | |
189 | ALL_BAND_FILTER) >> 8); | |
190 | ||
191 | val = max(silence_rssi_b, silence_rssi_c); | |
192 | max_silence_rssi = max(silence_rssi_a, (u8) val); | |
193 | ||
194 | /* Store silence rssi in 20-beacon history table */ | |
195 | data->nrg_silence_rssi[data->nrg_silence_idx] = max_silence_rssi; | |
196 | data->nrg_silence_idx++; | |
197 | if (data->nrg_silence_idx >= NRG_NUM_PREV_STAT_L) | |
198 | data->nrg_silence_idx = 0; | |
199 | ||
200 | /* Find max silence rssi across 20 beacon history */ | |
201 | for (i = 0; i < NRG_NUM_PREV_STAT_L; i++) { | |
202 | val = data->nrg_silence_rssi[i]; | |
203 | silence_ref = max(silence_ref, val); | |
204 | } | |
e1623446 | 205 | IWL_DEBUG_CALIB(priv, "silence a %u, b %u, c %u, 20-bcn max %u\n", |
f0832f13 EG |
206 | silence_rssi_a, silence_rssi_b, silence_rssi_c, |
207 | silence_ref); | |
208 | ||
209 | /* Find max rx energy (min value!) among all 3 receivers, | |
210 | * measured during beacon frame. | |
211 | * Save it in 10-beacon history table. */ | |
212 | i = data->nrg_energy_idx; | |
213 | val = min(rx_info->beacon_energy_b, rx_info->beacon_energy_c); | |
214 | data->nrg_value[i] = min(rx_info->beacon_energy_a, val); | |
215 | ||
216 | data->nrg_energy_idx++; | |
217 | if (data->nrg_energy_idx >= 10) | |
218 | data->nrg_energy_idx = 0; | |
219 | ||
220 | /* Find min rx energy (max value) across 10 beacon history. | |
221 | * This is the minimum signal level that we want to receive well. | |
222 | * Add backoff (margin so we don't miss slightly lower energy frames). | |
223 | * This establishes an upper bound (min value) for energy threshold. */ | |
224 | max_nrg_cck = data->nrg_value[0]; | |
225 | for (i = 1; i < 10; i++) | |
226 | max_nrg_cck = (u32) max(max_nrg_cck, (data->nrg_value[i])); | |
227 | max_nrg_cck += 6; | |
228 | ||
e1623446 | 229 | IWL_DEBUG_CALIB(priv, "rx energy a %u, b %u, c %u, 10-bcn max/min %u\n", |
f0832f13 EG |
230 | rx_info->beacon_energy_a, rx_info->beacon_energy_b, |
231 | rx_info->beacon_energy_c, max_nrg_cck - 6); | |
232 | ||
233 | /* Count number of consecutive beacons with fewer-than-desired | |
234 | * false alarms. */ | |
235 | if (false_alarms < min_false_alarms) | |
236 | data->num_in_cck_no_fa++; | |
237 | else | |
238 | data->num_in_cck_no_fa = 0; | |
e1623446 | 239 | IWL_DEBUG_CALIB(priv, "consecutive bcns with few false alarms = %u\n", |
f0832f13 EG |
240 | data->num_in_cck_no_fa); |
241 | ||
242 | /* If we got too many false alarms this time, reduce sensitivity */ | |
243 | if ((false_alarms > max_false_alarms) && | |
244 | (data->auto_corr_cck > AUTO_CORR_MAX_TH_CCK)) { | |
e1623446 | 245 | IWL_DEBUG_CALIB(priv, "norm FA %u > max FA %u\n", |
f0832f13 | 246 | false_alarms, max_false_alarms); |
e1623446 | 247 | IWL_DEBUG_CALIB(priv, "... reducing sensitivity\n"); |
f0832f13 EG |
248 | data->nrg_curr_state = IWL_FA_TOO_MANY; |
249 | /* Store for "fewer than desired" on later beacon */ | |
250 | data->nrg_silence_ref = silence_ref; | |
251 | ||
252 | /* increase energy threshold (reduce nrg value) | |
253 | * to decrease sensitivity */ | |
254 | if (data->nrg_th_cck > | |
255 | (ranges->max_nrg_cck + NRG_STEP_CCK)) | |
256 | data->nrg_th_cck = data->nrg_th_cck | |
257 | - NRG_STEP_CCK; | |
258 | else | |
259 | data->nrg_th_cck = ranges->max_nrg_cck; | |
260 | /* Else if we got fewer than desired, increase sensitivity */ | |
261 | } else if (false_alarms < min_false_alarms) { | |
262 | data->nrg_curr_state = IWL_FA_TOO_FEW; | |
263 | ||
264 | /* Compare silence level with silence level for most recent | |
265 | * healthy number or too many false alarms */ | |
266 | data->nrg_auto_corr_silence_diff = (s32)data->nrg_silence_ref - | |
267 | (s32)silence_ref; | |
268 | ||
e1623446 | 269 | IWL_DEBUG_CALIB(priv, "norm FA %u < min FA %u, silence diff %d\n", |
f0832f13 EG |
270 | false_alarms, min_false_alarms, |
271 | data->nrg_auto_corr_silence_diff); | |
272 | ||
273 | /* Increase value to increase sensitivity, but only if: | |
274 | * 1a) previous beacon did *not* have *too many* false alarms | |
275 | * 1b) AND there's a significant difference in Rx levels | |
276 | * from a previous beacon with too many, or healthy # FAs | |
277 | * OR 2) We've seen a lot of beacons (100) with too few | |
278 | * false alarms */ | |
279 | if ((data->nrg_prev_state != IWL_FA_TOO_MANY) && | |
280 | ((data->nrg_auto_corr_silence_diff > NRG_DIFF) || | |
281 | (data->num_in_cck_no_fa > MAX_NUMBER_CCK_NO_FA))) { | |
282 | ||
e1623446 | 283 | IWL_DEBUG_CALIB(priv, "... increasing sensitivity\n"); |
f0832f13 EG |
284 | /* Increase nrg value to increase sensitivity */ |
285 | val = data->nrg_th_cck + NRG_STEP_CCK; | |
286 | data->nrg_th_cck = min((u32)ranges->min_nrg_cck, val); | |
287 | } else { | |
e1623446 | 288 | IWL_DEBUG_CALIB(priv, "... but not changing sensitivity\n"); |
f0832f13 EG |
289 | } |
290 | ||
291 | /* Else we got a healthy number of false alarms, keep status quo */ | |
292 | } else { | |
e1623446 | 293 | IWL_DEBUG_CALIB(priv, " FA in safe zone\n"); |
f0832f13 EG |
294 | data->nrg_curr_state = IWL_FA_GOOD_RANGE; |
295 | ||
296 | /* Store for use in "fewer than desired" with later beacon */ | |
297 | data->nrg_silence_ref = silence_ref; | |
298 | ||
299 | /* If previous beacon had too many false alarms, | |
300 | * give it some extra margin by reducing sensitivity again | |
301 | * (but don't go below measured energy of desired Rx) */ | |
302 | if (IWL_FA_TOO_MANY == data->nrg_prev_state) { | |
e1623446 | 303 | IWL_DEBUG_CALIB(priv, "... increasing margin\n"); |
f0832f13 EG |
304 | if (data->nrg_th_cck > (max_nrg_cck + NRG_MARGIN)) |
305 | data->nrg_th_cck -= NRG_MARGIN; | |
306 | else | |
307 | data->nrg_th_cck = max_nrg_cck; | |
308 | } | |
309 | } | |
310 | ||
311 | /* Make sure the energy threshold does not go above the measured | |
312 | * energy of the desired Rx signals (reduced by backoff margin), | |
313 | * or else we might start missing Rx frames. | |
314 | * Lower value is higher energy, so we use max()! | |
315 | */ | |
316 | data->nrg_th_cck = max(max_nrg_cck, data->nrg_th_cck); | |
e1623446 | 317 | IWL_DEBUG_CALIB(priv, "new nrg_th_cck %u\n", data->nrg_th_cck); |
f0832f13 EG |
318 | |
319 | data->nrg_prev_state = data->nrg_curr_state; | |
320 | ||
321 | /* Auto-correlation CCK algorithm */ | |
322 | if (false_alarms > min_false_alarms) { | |
323 | ||
324 | /* increase auto_corr values to decrease sensitivity | |
325 | * so the DSP won't be disturbed by the noise | |
326 | */ | |
327 | if (data->auto_corr_cck < AUTO_CORR_MAX_TH_CCK) | |
328 | data->auto_corr_cck = AUTO_CORR_MAX_TH_CCK + 1; | |
329 | else { | |
330 | val = data->auto_corr_cck + AUTO_CORR_STEP_CCK; | |
331 | data->auto_corr_cck = | |
332 | min((u32)ranges->auto_corr_max_cck, val); | |
333 | } | |
334 | val = data->auto_corr_cck_mrc + AUTO_CORR_STEP_CCK; | |
335 | data->auto_corr_cck_mrc = | |
336 | min((u32)ranges->auto_corr_max_cck_mrc, val); | |
337 | } else if ((false_alarms < min_false_alarms) && | |
338 | ((data->nrg_auto_corr_silence_diff > NRG_DIFF) || | |
339 | (data->num_in_cck_no_fa > MAX_NUMBER_CCK_NO_FA))) { | |
340 | ||
341 | /* Decrease auto_corr values to increase sensitivity */ | |
342 | val = data->auto_corr_cck - AUTO_CORR_STEP_CCK; | |
343 | data->auto_corr_cck = | |
344 | max((u32)ranges->auto_corr_min_cck, val); | |
345 | val = data->auto_corr_cck_mrc - AUTO_CORR_STEP_CCK; | |
346 | data->auto_corr_cck_mrc = | |
347 | max((u32)ranges->auto_corr_min_cck_mrc, val); | |
348 | } | |
349 | ||
350 | return 0; | |
351 | } | |
352 | ||
353 | ||
354 | static int iwl_sens_auto_corr_ofdm(struct iwl_priv *priv, | |
355 | u32 norm_fa, | |
356 | u32 rx_enable_time) | |
357 | { | |
358 | u32 val; | |
359 | u32 false_alarms = norm_fa * 200 * 1024; | |
360 | u32 max_false_alarms = MAX_FA_OFDM * rx_enable_time; | |
361 | u32 min_false_alarms = MIN_FA_OFDM * rx_enable_time; | |
362 | struct iwl_sensitivity_data *data = NULL; | |
363 | const struct iwl_sensitivity_ranges *ranges = priv->hw_params.sens; | |
364 | ||
365 | data = &(priv->sensitivity_data); | |
366 | ||
367 | /* If we got too many false alarms this time, reduce sensitivity */ | |
368 | if (false_alarms > max_false_alarms) { | |
369 | ||
e1623446 | 370 | IWL_DEBUG_CALIB(priv, "norm FA %u > max FA %u)\n", |
f0832f13 EG |
371 | false_alarms, max_false_alarms); |
372 | ||
373 | val = data->auto_corr_ofdm + AUTO_CORR_STEP_OFDM; | |
374 | data->auto_corr_ofdm = | |
375 | min((u32)ranges->auto_corr_max_ofdm, val); | |
376 | ||
377 | val = data->auto_corr_ofdm_mrc + AUTO_CORR_STEP_OFDM; | |
378 | data->auto_corr_ofdm_mrc = | |
379 | min((u32)ranges->auto_corr_max_ofdm_mrc, val); | |
380 | ||
381 | val = data->auto_corr_ofdm_x1 + AUTO_CORR_STEP_OFDM; | |
382 | data->auto_corr_ofdm_x1 = | |
383 | min((u32)ranges->auto_corr_max_ofdm_x1, val); | |
384 | ||
385 | val = data->auto_corr_ofdm_mrc_x1 + AUTO_CORR_STEP_OFDM; | |
386 | data->auto_corr_ofdm_mrc_x1 = | |
387 | min((u32)ranges->auto_corr_max_ofdm_mrc_x1, val); | |
388 | } | |
389 | ||
390 | /* Else if we got fewer than desired, increase sensitivity */ | |
391 | else if (false_alarms < min_false_alarms) { | |
392 | ||
e1623446 | 393 | IWL_DEBUG_CALIB(priv, "norm FA %u < min FA %u\n", |
f0832f13 EG |
394 | false_alarms, min_false_alarms); |
395 | ||
396 | val = data->auto_corr_ofdm - AUTO_CORR_STEP_OFDM; | |
397 | data->auto_corr_ofdm = | |
398 | max((u32)ranges->auto_corr_min_ofdm, val); | |
399 | ||
400 | val = data->auto_corr_ofdm_mrc - AUTO_CORR_STEP_OFDM; | |
401 | data->auto_corr_ofdm_mrc = | |
402 | max((u32)ranges->auto_corr_min_ofdm_mrc, val); | |
403 | ||
404 | val = data->auto_corr_ofdm_x1 - AUTO_CORR_STEP_OFDM; | |
405 | data->auto_corr_ofdm_x1 = | |
406 | max((u32)ranges->auto_corr_min_ofdm_x1, val); | |
407 | ||
408 | val = data->auto_corr_ofdm_mrc_x1 - AUTO_CORR_STEP_OFDM; | |
409 | data->auto_corr_ofdm_mrc_x1 = | |
410 | max((u32)ranges->auto_corr_min_ofdm_mrc_x1, val); | |
411 | } else { | |
e1623446 | 412 | IWL_DEBUG_CALIB(priv, "min FA %u < norm FA %u < max FA %u OK\n", |
f0832f13 EG |
413 | min_false_alarms, false_alarms, max_false_alarms); |
414 | } | |
415 | return 0; | |
416 | } | |
417 | ||
418 | /* Prepare a SENSITIVITY_CMD, send to uCode if values have changed */ | |
419 | static int iwl_sensitivity_write(struct iwl_priv *priv) | |
420 | { | |
421 | int ret = 0; | |
422 | struct iwl_sensitivity_cmd cmd ; | |
423 | struct iwl_sensitivity_data *data = NULL; | |
424 | struct iwl_host_cmd cmd_out = { | |
425 | .id = SENSITIVITY_CMD, | |
426 | .len = sizeof(struct iwl_sensitivity_cmd), | |
427 | .meta.flags = CMD_ASYNC, | |
428 | .data = &cmd, | |
429 | }; | |
430 | ||
431 | data = &(priv->sensitivity_data); | |
432 | ||
433 | memset(&cmd, 0, sizeof(cmd)); | |
434 | ||
435 | cmd.table[HD_AUTO_CORR32_X4_TH_ADD_MIN_INDEX] = | |
436 | cpu_to_le16((u16)data->auto_corr_ofdm); | |
437 | cmd.table[HD_AUTO_CORR32_X4_TH_ADD_MIN_MRC_INDEX] = | |
438 | cpu_to_le16((u16)data->auto_corr_ofdm_mrc); | |
439 | cmd.table[HD_AUTO_CORR32_X1_TH_ADD_MIN_INDEX] = | |
440 | cpu_to_le16((u16)data->auto_corr_ofdm_x1); | |
441 | cmd.table[HD_AUTO_CORR32_X1_TH_ADD_MIN_MRC_INDEX] = | |
442 | cpu_to_le16((u16)data->auto_corr_ofdm_mrc_x1); | |
443 | ||
444 | cmd.table[HD_AUTO_CORR40_X4_TH_ADD_MIN_INDEX] = | |
445 | cpu_to_le16((u16)data->auto_corr_cck); | |
446 | cmd.table[HD_AUTO_CORR40_X4_TH_ADD_MIN_MRC_INDEX] = | |
447 | cpu_to_le16((u16)data->auto_corr_cck_mrc); | |
448 | ||
449 | cmd.table[HD_MIN_ENERGY_CCK_DET_INDEX] = | |
450 | cpu_to_le16((u16)data->nrg_th_cck); | |
451 | cmd.table[HD_MIN_ENERGY_OFDM_DET_INDEX] = | |
452 | cpu_to_le16((u16)data->nrg_th_ofdm); | |
453 | ||
454 | cmd.table[HD_BARKER_CORR_TH_ADD_MIN_INDEX] = | |
455 | __constant_cpu_to_le16(190); | |
456 | cmd.table[HD_BARKER_CORR_TH_ADD_MIN_MRC_INDEX] = | |
457 | __constant_cpu_to_le16(390); | |
458 | cmd.table[HD_OFDM_ENERGY_TH_IN_INDEX] = | |
459 | __constant_cpu_to_le16(62); | |
460 | ||
e1623446 | 461 | IWL_DEBUG_CALIB(priv, "ofdm: ac %u mrc %u x1 %u mrc_x1 %u thresh %u\n", |
f0832f13 EG |
462 | data->auto_corr_ofdm, data->auto_corr_ofdm_mrc, |
463 | data->auto_corr_ofdm_x1, data->auto_corr_ofdm_mrc_x1, | |
464 | data->nrg_th_ofdm); | |
465 | ||
e1623446 | 466 | IWL_DEBUG_CALIB(priv, "cck: ac %u mrc %u thresh %u\n", |
f0832f13 EG |
467 | data->auto_corr_cck, data->auto_corr_cck_mrc, |
468 | data->nrg_th_cck); | |
469 | ||
470 | /* Update uCode's "work" table, and copy it to DSP */ | |
471 | cmd.control = SENSITIVITY_CMD_CONTROL_WORK_TABLE; | |
472 | ||
473 | /* Don't send command to uCode if nothing has changed */ | |
474 | if (!memcmp(&cmd.table[0], &(priv->sensitivity_tbl[0]), | |
475 | sizeof(u16)*HD_TABLE_SIZE)) { | |
e1623446 | 476 | IWL_DEBUG_CALIB(priv, "No change in SENSITIVITY_CMD\n"); |
f0832f13 EG |
477 | return 0; |
478 | } | |
479 | ||
480 | /* Copy table for comparison next time */ | |
481 | memcpy(&(priv->sensitivity_tbl[0]), &(cmd.table[0]), | |
482 | sizeof(u16)*HD_TABLE_SIZE); | |
483 | ||
484 | ret = iwl_send_cmd(priv, &cmd_out); | |
485 | if (ret) | |
15b1687c | 486 | IWL_ERR(priv, "SENSITIVITY_CMD failed\n"); |
f0832f13 EG |
487 | |
488 | return ret; | |
489 | } | |
490 | ||
491 | void iwl_init_sensitivity(struct iwl_priv *priv) | |
492 | { | |
493 | int ret = 0; | |
494 | int i; | |
495 | struct iwl_sensitivity_data *data = NULL; | |
496 | const struct iwl_sensitivity_ranges *ranges = priv->hw_params.sens; | |
497 | ||
445c2dff TW |
498 | if (priv->disable_sens_cal) |
499 | return; | |
500 | ||
e1623446 | 501 | IWL_DEBUG_CALIB(priv, "Start iwl_init_sensitivity\n"); |
f0832f13 EG |
502 | |
503 | /* Clear driver's sensitivity algo data */ | |
504 | data = &(priv->sensitivity_data); | |
505 | ||
506 | if (ranges == NULL) | |
f0832f13 EG |
507 | return; |
508 | ||
509 | memset(data, 0, sizeof(struct iwl_sensitivity_data)); | |
510 | ||
511 | data->num_in_cck_no_fa = 0; | |
512 | data->nrg_curr_state = IWL_FA_TOO_MANY; | |
513 | data->nrg_prev_state = IWL_FA_TOO_MANY; | |
514 | data->nrg_silence_ref = 0; | |
515 | data->nrg_silence_idx = 0; | |
516 | data->nrg_energy_idx = 0; | |
517 | ||
518 | for (i = 0; i < 10; i++) | |
519 | data->nrg_value[i] = 0; | |
520 | ||
521 | for (i = 0; i < NRG_NUM_PREV_STAT_L; i++) | |
522 | data->nrg_silence_rssi[i] = 0; | |
523 | ||
524 | data->auto_corr_ofdm = 90; | |
525 | data->auto_corr_ofdm_mrc = ranges->auto_corr_min_ofdm_mrc; | |
526 | data->auto_corr_ofdm_x1 = ranges->auto_corr_min_ofdm_x1; | |
527 | data->auto_corr_ofdm_mrc_x1 = ranges->auto_corr_min_ofdm_mrc_x1; | |
528 | data->auto_corr_cck = AUTO_CORR_CCK_MIN_VAL_DEF; | |
529 | data->auto_corr_cck_mrc = ranges->auto_corr_min_cck_mrc; | |
530 | data->nrg_th_cck = ranges->nrg_th_cck; | |
531 | data->nrg_th_ofdm = ranges->nrg_th_ofdm; | |
532 | ||
533 | data->last_bad_plcp_cnt_ofdm = 0; | |
534 | data->last_fa_cnt_ofdm = 0; | |
535 | data->last_bad_plcp_cnt_cck = 0; | |
536 | data->last_fa_cnt_cck = 0; | |
537 | ||
538 | ret |= iwl_sensitivity_write(priv); | |
e1623446 | 539 | IWL_DEBUG_CALIB(priv, "<<return 0x%X\n", ret); |
f0832f13 EG |
540 | } |
541 | EXPORT_SYMBOL(iwl_init_sensitivity); | |
542 | ||
543 | void iwl_sensitivity_calibration(struct iwl_priv *priv, | |
8f91aecb | 544 | struct iwl_notif_statistics *resp) |
f0832f13 EG |
545 | { |
546 | u32 rx_enable_time; | |
547 | u32 fa_cck; | |
548 | u32 fa_ofdm; | |
549 | u32 bad_plcp_cck; | |
550 | u32 bad_plcp_ofdm; | |
551 | u32 norm_fa_ofdm; | |
552 | u32 norm_fa_cck; | |
553 | struct iwl_sensitivity_data *data = NULL; | |
554 | struct statistics_rx_non_phy *rx_info = &(resp->rx.general); | |
555 | struct statistics_rx *statistics = &(resp->rx); | |
556 | unsigned long flags; | |
557 | struct statistics_general_data statis; | |
558 | ||
445c2dff TW |
559 | if (priv->disable_sens_cal) |
560 | return; | |
561 | ||
f0832f13 EG |
562 | data = &(priv->sensitivity_data); |
563 | ||
564 | if (!iwl_is_associated(priv)) { | |
e1623446 | 565 | IWL_DEBUG_CALIB(priv, "<< - not associated\n"); |
f0832f13 EG |
566 | return; |
567 | } | |
568 | ||
569 | spin_lock_irqsave(&priv->lock, flags); | |
570 | if (rx_info->interference_data_flag != INTERFERENCE_DATA_AVAILABLE) { | |
e1623446 | 571 | IWL_DEBUG_CALIB(priv, "<< invalid data.\n"); |
f0832f13 EG |
572 | spin_unlock_irqrestore(&priv->lock, flags); |
573 | return; | |
574 | } | |
575 | ||
576 | /* Extract Statistics: */ | |
577 | rx_enable_time = le32_to_cpu(rx_info->channel_load); | |
578 | fa_cck = le32_to_cpu(statistics->cck.false_alarm_cnt); | |
579 | fa_ofdm = le32_to_cpu(statistics->ofdm.false_alarm_cnt); | |
580 | bad_plcp_cck = le32_to_cpu(statistics->cck.plcp_err); | |
581 | bad_plcp_ofdm = le32_to_cpu(statistics->ofdm.plcp_err); | |
582 | ||
583 | statis.beacon_silence_rssi_a = | |
584 | le32_to_cpu(statistics->general.beacon_silence_rssi_a); | |
585 | statis.beacon_silence_rssi_b = | |
586 | le32_to_cpu(statistics->general.beacon_silence_rssi_b); | |
587 | statis.beacon_silence_rssi_c = | |
588 | le32_to_cpu(statistics->general.beacon_silence_rssi_c); | |
589 | statis.beacon_energy_a = | |
590 | le32_to_cpu(statistics->general.beacon_energy_a); | |
591 | statis.beacon_energy_b = | |
592 | le32_to_cpu(statistics->general.beacon_energy_b); | |
593 | statis.beacon_energy_c = | |
594 | le32_to_cpu(statistics->general.beacon_energy_c); | |
595 | ||
596 | spin_unlock_irqrestore(&priv->lock, flags); | |
597 | ||
e1623446 | 598 | IWL_DEBUG_CALIB(priv, "rx_enable_time = %u usecs\n", rx_enable_time); |
f0832f13 EG |
599 | |
600 | if (!rx_enable_time) { | |
e1623446 | 601 | IWL_DEBUG_CALIB(priv, "<< RX Enable Time == 0! \n"); |
f0832f13 EG |
602 | return; |
603 | } | |
604 | ||
605 | /* These statistics increase monotonically, and do not reset | |
606 | * at each beacon. Calculate difference from last value, or just | |
607 | * use the new statistics value if it has reset or wrapped around. */ | |
608 | if (data->last_bad_plcp_cnt_cck > bad_plcp_cck) | |
609 | data->last_bad_plcp_cnt_cck = bad_plcp_cck; | |
610 | else { | |
611 | bad_plcp_cck -= data->last_bad_plcp_cnt_cck; | |
612 | data->last_bad_plcp_cnt_cck += bad_plcp_cck; | |
613 | } | |
614 | ||
615 | if (data->last_bad_plcp_cnt_ofdm > bad_plcp_ofdm) | |
616 | data->last_bad_plcp_cnt_ofdm = bad_plcp_ofdm; | |
617 | else { | |
618 | bad_plcp_ofdm -= data->last_bad_plcp_cnt_ofdm; | |
619 | data->last_bad_plcp_cnt_ofdm += bad_plcp_ofdm; | |
620 | } | |
621 | ||
622 | if (data->last_fa_cnt_ofdm > fa_ofdm) | |
623 | data->last_fa_cnt_ofdm = fa_ofdm; | |
624 | else { | |
625 | fa_ofdm -= data->last_fa_cnt_ofdm; | |
626 | data->last_fa_cnt_ofdm += fa_ofdm; | |
627 | } | |
628 | ||
629 | if (data->last_fa_cnt_cck > fa_cck) | |
630 | data->last_fa_cnt_cck = fa_cck; | |
631 | else { | |
632 | fa_cck -= data->last_fa_cnt_cck; | |
633 | data->last_fa_cnt_cck += fa_cck; | |
634 | } | |
635 | ||
636 | /* Total aborted signal locks */ | |
637 | norm_fa_ofdm = fa_ofdm + bad_plcp_ofdm; | |
638 | norm_fa_cck = fa_cck + bad_plcp_cck; | |
639 | ||
e1623446 | 640 | IWL_DEBUG_CALIB(priv, "cck: fa %u badp %u ofdm: fa %u badp %u\n", fa_cck, |
f0832f13 EG |
641 | bad_plcp_cck, fa_ofdm, bad_plcp_ofdm); |
642 | ||
643 | iwl_sens_auto_corr_ofdm(priv, norm_fa_ofdm, rx_enable_time); | |
644 | iwl_sens_energy_cck(priv, norm_fa_cck, rx_enable_time, &statis); | |
645 | iwl_sensitivity_write(priv); | |
646 | ||
647 | return; | |
648 | } | |
649 | EXPORT_SYMBOL(iwl_sensitivity_calibration); | |
650 | ||
651 | /* | |
652 | * Accumulate 20 beacons of signal and noise statistics for each of | |
653 | * 3 receivers/antennas/rx-chains, then figure out: | |
654 | * 1) Which antennas are connected. | |
655 | * 2) Differential rx gain settings to balance the 3 receivers. | |
656 | */ | |
657 | void iwl_chain_noise_calibration(struct iwl_priv *priv, | |
8f91aecb | 658 | struct iwl_notif_statistics *stat_resp) |
f0832f13 EG |
659 | { |
660 | struct iwl_chain_noise_data *data = NULL; | |
661 | ||
662 | u32 chain_noise_a; | |
663 | u32 chain_noise_b; | |
664 | u32 chain_noise_c; | |
665 | u32 chain_sig_a; | |
666 | u32 chain_sig_b; | |
667 | u32 chain_sig_c; | |
668 | u32 average_sig[NUM_RX_CHAINS] = {INITIALIZATION_VALUE}; | |
669 | u32 average_noise[NUM_RX_CHAINS] = {INITIALIZATION_VALUE}; | |
670 | u32 max_average_sig; | |
671 | u16 max_average_sig_antenna_i; | |
672 | u32 min_average_noise = MIN_AVERAGE_NOISE_MAX_VALUE; | |
673 | u16 min_average_noise_antenna_i = INITIALIZATION_VALUE; | |
674 | u16 i = 0; | |
675 | u16 rxon_chnum = INITIALIZATION_VALUE; | |
676 | u16 stat_chnum = INITIALIZATION_VALUE; | |
677 | u8 rxon_band24; | |
678 | u8 stat_band24; | |
679 | u32 active_chains = 0; | |
680 | u8 num_tx_chains; | |
681 | unsigned long flags; | |
682 | struct statistics_rx_non_phy *rx_info = &(stat_resp->rx.general); | |
683 | ||
445c2dff TW |
684 | if (priv->disable_chain_noise_cal) |
685 | return; | |
686 | ||
f0832f13 EG |
687 | data = &(priv->chain_noise_data); |
688 | ||
689 | /* Accumulate just the first 20 beacons after the first association, | |
690 | * then we're done forever. */ | |
691 | if (data->state != IWL_CHAIN_NOISE_ACCUMULATE) { | |
692 | if (data->state == IWL_CHAIN_NOISE_ALIVE) | |
e1623446 | 693 | IWL_DEBUG_CALIB(priv, "Wait for noise calib reset\n"); |
f0832f13 EG |
694 | return; |
695 | } | |
696 | ||
697 | spin_lock_irqsave(&priv->lock, flags); | |
698 | if (rx_info->interference_data_flag != INTERFERENCE_DATA_AVAILABLE) { | |
e1623446 | 699 | IWL_DEBUG_CALIB(priv, " << Interference data unavailable\n"); |
f0832f13 EG |
700 | spin_unlock_irqrestore(&priv->lock, flags); |
701 | return; | |
702 | } | |
703 | ||
704 | rxon_band24 = !!(priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK); | |
705 | rxon_chnum = le16_to_cpu(priv->staging_rxon.channel); | |
706 | stat_band24 = !!(stat_resp->flag & STATISTICS_REPLY_FLG_BAND_24G_MSK); | |
707 | stat_chnum = le32_to_cpu(stat_resp->flag) >> 16; | |
708 | ||
709 | /* Make sure we accumulate data for just the associated channel | |
710 | * (even if scanning). */ | |
711 | if ((rxon_chnum != stat_chnum) || (rxon_band24 != stat_band24)) { | |
e1623446 | 712 | IWL_DEBUG_CALIB(priv, "Stats not from chan=%d, band24=%d\n", |
f0832f13 EG |
713 | rxon_chnum, rxon_band24); |
714 | spin_unlock_irqrestore(&priv->lock, flags); | |
715 | return; | |
716 | } | |
717 | ||
718 | /* Accumulate beacon statistics values across 20 beacons */ | |
719 | chain_noise_a = le32_to_cpu(rx_info->beacon_silence_rssi_a) & | |
720 | IN_BAND_FILTER; | |
721 | chain_noise_b = le32_to_cpu(rx_info->beacon_silence_rssi_b) & | |
722 | IN_BAND_FILTER; | |
723 | chain_noise_c = le32_to_cpu(rx_info->beacon_silence_rssi_c) & | |
724 | IN_BAND_FILTER; | |
725 | ||
726 | chain_sig_a = le32_to_cpu(rx_info->beacon_rssi_a) & IN_BAND_FILTER; | |
727 | chain_sig_b = le32_to_cpu(rx_info->beacon_rssi_b) & IN_BAND_FILTER; | |
728 | chain_sig_c = le32_to_cpu(rx_info->beacon_rssi_c) & IN_BAND_FILTER; | |
729 | ||
730 | spin_unlock_irqrestore(&priv->lock, flags); | |
731 | ||
732 | data->beacon_count++; | |
733 | ||
734 | data->chain_noise_a = (chain_noise_a + data->chain_noise_a); | |
735 | data->chain_noise_b = (chain_noise_b + data->chain_noise_b); | |
736 | data->chain_noise_c = (chain_noise_c + data->chain_noise_c); | |
737 | ||
738 | data->chain_signal_a = (chain_sig_a + data->chain_signal_a); | |
739 | data->chain_signal_b = (chain_sig_b + data->chain_signal_b); | |
740 | data->chain_signal_c = (chain_sig_c + data->chain_signal_c); | |
741 | ||
e1623446 | 742 | IWL_DEBUG_CALIB(priv, "chan=%d, band24=%d, beacon=%d\n", |
f0832f13 | 743 | rxon_chnum, rxon_band24, data->beacon_count); |
e1623446 | 744 | IWL_DEBUG_CALIB(priv, "chain_sig: a %d b %d c %d\n", |
f0832f13 | 745 | chain_sig_a, chain_sig_b, chain_sig_c); |
e1623446 | 746 | IWL_DEBUG_CALIB(priv, "chain_noise: a %d b %d c %d\n", |
f0832f13 EG |
747 | chain_noise_a, chain_noise_b, chain_noise_c); |
748 | ||
749 | /* If this is the 20th beacon, determine: | |
750 | * 1) Disconnected antennas (using signal strengths) | |
751 | * 2) Differential gain (using silence noise) to balance receivers */ | |
752 | if (data->beacon_count != CAL_NUM_OF_BEACONS) | |
753 | return; | |
754 | ||
755 | /* Analyze signal for disconnected antenna */ | |
756 | average_sig[0] = (data->chain_signal_a) / CAL_NUM_OF_BEACONS; | |
757 | average_sig[1] = (data->chain_signal_b) / CAL_NUM_OF_BEACONS; | |
758 | average_sig[2] = (data->chain_signal_c) / CAL_NUM_OF_BEACONS; | |
759 | ||
760 | if (average_sig[0] >= average_sig[1]) { | |
761 | max_average_sig = average_sig[0]; | |
762 | max_average_sig_antenna_i = 0; | |
763 | active_chains = (1 << max_average_sig_antenna_i); | |
764 | } else { | |
765 | max_average_sig = average_sig[1]; | |
766 | max_average_sig_antenna_i = 1; | |
767 | active_chains = (1 << max_average_sig_antenna_i); | |
768 | } | |
769 | ||
770 | if (average_sig[2] >= max_average_sig) { | |
771 | max_average_sig = average_sig[2]; | |
772 | max_average_sig_antenna_i = 2; | |
773 | active_chains = (1 << max_average_sig_antenna_i); | |
774 | } | |
775 | ||
e1623446 | 776 | IWL_DEBUG_CALIB(priv, "average_sig: a %d b %d c %d\n", |
f0832f13 | 777 | average_sig[0], average_sig[1], average_sig[2]); |
e1623446 | 778 | IWL_DEBUG_CALIB(priv, "max_average_sig = %d, antenna %d\n", |
f0832f13 EG |
779 | max_average_sig, max_average_sig_antenna_i); |
780 | ||
781 | /* Compare signal strengths for all 3 receivers. */ | |
782 | for (i = 0; i < NUM_RX_CHAINS; i++) { | |
783 | if (i != max_average_sig_antenna_i) { | |
784 | s32 rssi_delta = (max_average_sig - average_sig[i]); | |
785 | ||
786 | /* If signal is very weak, compared with | |
787 | * strongest, mark it as disconnected. */ | |
788 | if (rssi_delta > MAXIMUM_ALLOWED_PATHLOSS) | |
789 | data->disconn_array[i] = 1; | |
790 | else | |
791 | active_chains |= (1 << i); | |
e1623446 | 792 | IWL_DEBUG_CALIB(priv, "i = %d rssiDelta = %d " |
f0832f13 EG |
793 | "disconn_array[i] = %d\n", |
794 | i, rssi_delta, data->disconn_array[i]); | |
795 | } | |
796 | } | |
797 | ||
798 | num_tx_chains = 0; | |
799 | for (i = 0; i < NUM_RX_CHAINS; i++) { | |
800 | /* loops on all the bits of | |
801 | * priv->hw_setting.valid_tx_ant */ | |
802 | u8 ant_msk = (1 << i); | |
803 | if (!(priv->hw_params.valid_tx_ant & ant_msk)) | |
804 | continue; | |
805 | ||
806 | num_tx_chains++; | |
807 | if (data->disconn_array[i] == 0) | |
808 | /* there is a Tx antenna connected */ | |
809 | break; | |
810 | if (num_tx_chains == priv->hw_params.tx_chains_num && | |
811 | data->disconn_array[i]) { | |
812 | /* This is the last TX antenna and is also | |
813 | * disconnected connect it anyway */ | |
814 | data->disconn_array[i] = 0; | |
815 | active_chains |= ant_msk; | |
e1623446 | 816 | IWL_DEBUG_CALIB(priv, "All Tx chains are disconnected W/A - " |
f0832f13 EG |
817 | "declare %d as connected\n", i); |
818 | break; | |
819 | } | |
820 | } | |
821 | ||
04816448 GE |
822 | /* Save for use within RXON, TX, SCAN commands, etc. */ |
823 | priv->chain_noise_data.active_chains = active_chains; | |
e1623446 | 824 | IWL_DEBUG_CALIB(priv, "active_chains (bitwise) = 0x%x\n", |
f0832f13 EG |
825 | active_chains); |
826 | ||
f0832f13 EG |
827 | /* Analyze noise for rx balance */ |
828 | average_noise[0] = ((data->chain_noise_a)/CAL_NUM_OF_BEACONS); | |
829 | average_noise[1] = ((data->chain_noise_b)/CAL_NUM_OF_BEACONS); | |
830 | average_noise[2] = ((data->chain_noise_c)/CAL_NUM_OF_BEACONS); | |
831 | ||
832 | for (i = 0; i < NUM_RX_CHAINS; i++) { | |
833 | if (!(data->disconn_array[i]) && | |
834 | (average_noise[i] <= min_average_noise)) { | |
835 | /* This means that chain i is active and has | |
836 | * lower noise values so far: */ | |
837 | min_average_noise = average_noise[i]; | |
838 | min_average_noise_antenna_i = i; | |
839 | } | |
840 | } | |
841 | ||
e1623446 | 842 | IWL_DEBUG_CALIB(priv, "average_noise: a %d b %d c %d\n", |
f0832f13 EG |
843 | average_noise[0], average_noise[1], |
844 | average_noise[2]); | |
845 | ||
e1623446 | 846 | IWL_DEBUG_CALIB(priv, "min_average_noise = %d, antenna %d\n", |
f0832f13 EG |
847 | min_average_noise, min_average_noise_antenna_i); |
848 | ||
849 | priv->cfg->ops->utils->gain_computation(priv, average_noise, | |
850 | min_average_noise_antenna_i, min_average_noise); | |
04816448 GE |
851 | |
852 | /* Some power changes may have been made during the calibration. | |
853 | * Update and commit the RXON | |
854 | */ | |
855 | if (priv->cfg->ops->lib->update_chain_flags) | |
856 | priv->cfg->ops->lib->update_chain_flags(priv); | |
857 | ||
858 | data->state = IWL_CHAIN_NOISE_DONE; | |
859 | iwl_power_enable_management(priv); | |
f0832f13 EG |
860 | } |
861 | EXPORT_SYMBOL(iwl_chain_noise_calibration); | |
862 | ||
4a4a9e81 TW |
863 | |
864 | void iwl_reset_run_time_calib(struct iwl_priv *priv) | |
865 | { | |
866 | int i; | |
867 | memset(&(priv->sensitivity_data), 0, | |
868 | sizeof(struct iwl_sensitivity_data)); | |
869 | memset(&(priv->chain_noise_data), 0, | |
870 | sizeof(struct iwl_chain_noise_data)); | |
871 | for (i = 0; i < NUM_RX_CHAINS; i++) | |
872 | priv->chain_noise_data.delta_gain_code[i] = | |
873 | CHAIN_NOISE_DELTA_GAIN_INIT_VAL; | |
874 | ||
875 | /* Ask for statistics now, the uCode will send notification | |
876 | * periodically after association */ | |
877 | iwl_send_statistics_request(priv, CMD_ASYNC); | |
878 | } | |
879 | EXPORT_SYMBOL(iwl_reset_run_time_calib); | |
880 |