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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, | |
c2acea8e | 89 | .flags = CMD_SIZE_HUGE, |
6e21f2c1 TW |
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 | } | |
89f186a8 | 135 | EXPORT_SYMBOL(iwl_calib_free_results); |
6e21f2c1 TW |
136 | |
137 | /***************************************************************************** | |
138 | * RUNTIME calibrations framework | |
139 | *****************************************************************************/ | |
140 | ||
f0832f13 EG |
141 | /* "false alarms" are signals that our DSP tries to lock onto, |
142 | * but then determines that they are either noise, or transmissions | |
143 | * from a distant wireless network (also "noise", really) that get | |
144 | * "stepped on" by stronger transmissions within our own network. | |
145 | * This algorithm attempts to set a sensitivity level that is high | |
146 | * enough to receive all of our own network traffic, but not so | |
147 | * high that our DSP gets too busy trying to lock onto non-network | |
148 | * activity/noise. */ | |
149 | static int iwl_sens_energy_cck(struct iwl_priv *priv, | |
150 | u32 norm_fa, | |
151 | u32 rx_enable_time, | |
152 | struct statistics_general_data *rx_info) | |
153 | { | |
154 | u32 max_nrg_cck = 0; | |
155 | int i = 0; | |
156 | u8 max_silence_rssi = 0; | |
157 | u32 silence_ref = 0; | |
158 | u8 silence_rssi_a = 0; | |
159 | u8 silence_rssi_b = 0; | |
160 | u8 silence_rssi_c = 0; | |
161 | u32 val; | |
162 | ||
163 | /* "false_alarms" values below are cross-multiplications to assess the | |
164 | * numbers of false alarms within the measured period of actual Rx | |
165 | * (Rx is off when we're txing), vs the min/max expected false alarms | |
166 | * (some should be expected if rx is sensitive enough) in a | |
167 | * hypothetical listening period of 200 time units (TU), 204.8 msec: | |
168 | * | |
169 | * MIN_FA/fixed-time < false_alarms/actual-rx-time < MAX_FA/beacon-time | |
170 | * | |
171 | * */ | |
172 | u32 false_alarms = norm_fa * 200 * 1024; | |
173 | u32 max_false_alarms = MAX_FA_CCK * rx_enable_time; | |
174 | u32 min_false_alarms = MIN_FA_CCK * rx_enable_time; | |
175 | struct iwl_sensitivity_data *data = NULL; | |
176 | const struct iwl_sensitivity_ranges *ranges = priv->hw_params.sens; | |
177 | ||
178 | data = &(priv->sensitivity_data); | |
179 | ||
180 | data->nrg_auto_corr_silence_diff = 0; | |
181 | ||
182 | /* Find max silence rssi among all 3 receivers. | |
183 | * This is background noise, which may include transmissions from other | |
184 | * networks, measured during silence before our network's beacon */ | |
185 | silence_rssi_a = (u8)((rx_info->beacon_silence_rssi_a & | |
186 | ALL_BAND_FILTER) >> 8); | |
187 | silence_rssi_b = (u8)((rx_info->beacon_silence_rssi_b & | |
188 | ALL_BAND_FILTER) >> 8); | |
189 | silence_rssi_c = (u8)((rx_info->beacon_silence_rssi_c & | |
190 | ALL_BAND_FILTER) >> 8); | |
191 | ||
192 | val = max(silence_rssi_b, silence_rssi_c); | |
193 | max_silence_rssi = max(silence_rssi_a, (u8) val); | |
194 | ||
195 | /* Store silence rssi in 20-beacon history table */ | |
196 | data->nrg_silence_rssi[data->nrg_silence_idx] = max_silence_rssi; | |
197 | data->nrg_silence_idx++; | |
198 | if (data->nrg_silence_idx >= NRG_NUM_PREV_STAT_L) | |
199 | data->nrg_silence_idx = 0; | |
200 | ||
201 | /* Find max silence rssi across 20 beacon history */ | |
202 | for (i = 0; i < NRG_NUM_PREV_STAT_L; i++) { | |
203 | val = data->nrg_silence_rssi[i]; | |
204 | silence_ref = max(silence_ref, val); | |
205 | } | |
e1623446 | 206 | IWL_DEBUG_CALIB(priv, "silence a %u, b %u, c %u, 20-bcn max %u\n", |
f0832f13 EG |
207 | silence_rssi_a, silence_rssi_b, silence_rssi_c, |
208 | silence_ref); | |
209 | ||
210 | /* Find max rx energy (min value!) among all 3 receivers, | |
211 | * measured during beacon frame. | |
212 | * Save it in 10-beacon history table. */ | |
213 | i = data->nrg_energy_idx; | |
214 | val = min(rx_info->beacon_energy_b, rx_info->beacon_energy_c); | |
215 | data->nrg_value[i] = min(rx_info->beacon_energy_a, val); | |
216 | ||
217 | data->nrg_energy_idx++; | |
218 | if (data->nrg_energy_idx >= 10) | |
219 | data->nrg_energy_idx = 0; | |
220 | ||
221 | /* Find min rx energy (max value) across 10 beacon history. | |
222 | * This is the minimum signal level that we want to receive well. | |
223 | * Add backoff (margin so we don't miss slightly lower energy frames). | |
224 | * This establishes an upper bound (min value) for energy threshold. */ | |
225 | max_nrg_cck = data->nrg_value[0]; | |
226 | for (i = 1; i < 10; i++) | |
227 | max_nrg_cck = (u32) max(max_nrg_cck, (data->nrg_value[i])); | |
228 | max_nrg_cck += 6; | |
229 | ||
e1623446 | 230 | IWL_DEBUG_CALIB(priv, "rx energy a %u, b %u, c %u, 10-bcn max/min %u\n", |
f0832f13 EG |
231 | rx_info->beacon_energy_a, rx_info->beacon_energy_b, |
232 | rx_info->beacon_energy_c, max_nrg_cck - 6); | |
233 | ||
234 | /* Count number of consecutive beacons with fewer-than-desired | |
235 | * false alarms. */ | |
236 | if (false_alarms < min_false_alarms) | |
237 | data->num_in_cck_no_fa++; | |
238 | else | |
239 | data->num_in_cck_no_fa = 0; | |
e1623446 | 240 | IWL_DEBUG_CALIB(priv, "consecutive bcns with few false alarms = %u\n", |
f0832f13 EG |
241 | data->num_in_cck_no_fa); |
242 | ||
243 | /* If we got too many false alarms this time, reduce sensitivity */ | |
244 | if ((false_alarms > max_false_alarms) && | |
245 | (data->auto_corr_cck > AUTO_CORR_MAX_TH_CCK)) { | |
e1623446 | 246 | IWL_DEBUG_CALIB(priv, "norm FA %u > max FA %u\n", |
f0832f13 | 247 | false_alarms, max_false_alarms); |
e1623446 | 248 | IWL_DEBUG_CALIB(priv, "... reducing sensitivity\n"); |
f0832f13 EG |
249 | data->nrg_curr_state = IWL_FA_TOO_MANY; |
250 | /* Store for "fewer than desired" on later beacon */ | |
251 | data->nrg_silence_ref = silence_ref; | |
252 | ||
253 | /* increase energy threshold (reduce nrg value) | |
254 | * to decrease sensitivity */ | |
fe6efb4b | 255 | data->nrg_th_cck = data->nrg_th_cck - NRG_STEP_CCK; |
f0832f13 EG |
256 | /* Else if we got fewer than desired, increase sensitivity */ |
257 | } else if (false_alarms < min_false_alarms) { | |
258 | data->nrg_curr_state = IWL_FA_TOO_FEW; | |
259 | ||
260 | /* Compare silence level with silence level for most recent | |
261 | * healthy number or too many false alarms */ | |
262 | data->nrg_auto_corr_silence_diff = (s32)data->nrg_silence_ref - | |
263 | (s32)silence_ref; | |
264 | ||
e1623446 | 265 | IWL_DEBUG_CALIB(priv, "norm FA %u < min FA %u, silence diff %d\n", |
f0832f13 EG |
266 | false_alarms, min_false_alarms, |
267 | data->nrg_auto_corr_silence_diff); | |
268 | ||
269 | /* Increase value to increase sensitivity, but only if: | |
270 | * 1a) previous beacon did *not* have *too many* false alarms | |
271 | * 1b) AND there's a significant difference in Rx levels | |
272 | * from a previous beacon with too many, or healthy # FAs | |
273 | * OR 2) We've seen a lot of beacons (100) with too few | |
274 | * false alarms */ | |
275 | if ((data->nrg_prev_state != IWL_FA_TOO_MANY) && | |
276 | ((data->nrg_auto_corr_silence_diff > NRG_DIFF) || | |
277 | (data->num_in_cck_no_fa > MAX_NUMBER_CCK_NO_FA))) { | |
278 | ||
e1623446 | 279 | IWL_DEBUG_CALIB(priv, "... increasing sensitivity\n"); |
f0832f13 EG |
280 | /* Increase nrg value to increase sensitivity */ |
281 | val = data->nrg_th_cck + NRG_STEP_CCK; | |
282 | data->nrg_th_cck = min((u32)ranges->min_nrg_cck, val); | |
283 | } else { | |
e1623446 | 284 | IWL_DEBUG_CALIB(priv, "... but not changing sensitivity\n"); |
f0832f13 EG |
285 | } |
286 | ||
287 | /* Else we got a healthy number of false alarms, keep status quo */ | |
288 | } else { | |
e1623446 | 289 | IWL_DEBUG_CALIB(priv, " FA in safe zone\n"); |
f0832f13 EG |
290 | data->nrg_curr_state = IWL_FA_GOOD_RANGE; |
291 | ||
292 | /* Store for use in "fewer than desired" with later beacon */ | |
293 | data->nrg_silence_ref = silence_ref; | |
294 | ||
295 | /* If previous beacon had too many false alarms, | |
296 | * give it some extra margin by reducing sensitivity again | |
297 | * (but don't go below measured energy of desired Rx) */ | |
298 | if (IWL_FA_TOO_MANY == data->nrg_prev_state) { | |
e1623446 | 299 | IWL_DEBUG_CALIB(priv, "... increasing margin\n"); |
f0832f13 EG |
300 | if (data->nrg_th_cck > (max_nrg_cck + NRG_MARGIN)) |
301 | data->nrg_th_cck -= NRG_MARGIN; | |
302 | else | |
303 | data->nrg_th_cck = max_nrg_cck; | |
304 | } | |
305 | } | |
306 | ||
307 | /* Make sure the energy threshold does not go above the measured | |
308 | * energy of the desired Rx signals (reduced by backoff margin), | |
309 | * or else we might start missing Rx frames. | |
310 | * Lower value is higher energy, so we use max()! | |
311 | */ | |
312 | data->nrg_th_cck = max(max_nrg_cck, data->nrg_th_cck); | |
e1623446 | 313 | IWL_DEBUG_CALIB(priv, "new nrg_th_cck %u\n", data->nrg_th_cck); |
f0832f13 EG |
314 | |
315 | data->nrg_prev_state = data->nrg_curr_state; | |
316 | ||
317 | /* Auto-correlation CCK algorithm */ | |
318 | if (false_alarms > min_false_alarms) { | |
319 | ||
320 | /* increase auto_corr values to decrease sensitivity | |
321 | * so the DSP won't be disturbed by the noise | |
322 | */ | |
323 | if (data->auto_corr_cck < AUTO_CORR_MAX_TH_CCK) | |
324 | data->auto_corr_cck = AUTO_CORR_MAX_TH_CCK + 1; | |
325 | else { | |
326 | val = data->auto_corr_cck + AUTO_CORR_STEP_CCK; | |
327 | data->auto_corr_cck = | |
328 | min((u32)ranges->auto_corr_max_cck, val); | |
329 | } | |
330 | val = data->auto_corr_cck_mrc + AUTO_CORR_STEP_CCK; | |
331 | data->auto_corr_cck_mrc = | |
332 | min((u32)ranges->auto_corr_max_cck_mrc, val); | |
333 | } else if ((false_alarms < min_false_alarms) && | |
334 | ((data->nrg_auto_corr_silence_diff > NRG_DIFF) || | |
335 | (data->num_in_cck_no_fa > MAX_NUMBER_CCK_NO_FA))) { | |
336 | ||
337 | /* Decrease auto_corr values to increase sensitivity */ | |
338 | val = data->auto_corr_cck - AUTO_CORR_STEP_CCK; | |
339 | data->auto_corr_cck = | |
340 | max((u32)ranges->auto_corr_min_cck, val); | |
341 | val = data->auto_corr_cck_mrc - AUTO_CORR_STEP_CCK; | |
342 | data->auto_corr_cck_mrc = | |
343 | max((u32)ranges->auto_corr_min_cck_mrc, val); | |
344 | } | |
345 | ||
346 | return 0; | |
347 | } | |
348 | ||
349 | ||
350 | static int iwl_sens_auto_corr_ofdm(struct iwl_priv *priv, | |
351 | u32 norm_fa, | |
352 | u32 rx_enable_time) | |
353 | { | |
354 | u32 val; | |
355 | u32 false_alarms = norm_fa * 200 * 1024; | |
356 | u32 max_false_alarms = MAX_FA_OFDM * rx_enable_time; | |
357 | u32 min_false_alarms = MIN_FA_OFDM * rx_enable_time; | |
358 | struct iwl_sensitivity_data *data = NULL; | |
359 | const struct iwl_sensitivity_ranges *ranges = priv->hw_params.sens; | |
360 | ||
361 | data = &(priv->sensitivity_data); | |
362 | ||
363 | /* If we got too many false alarms this time, reduce sensitivity */ | |
364 | if (false_alarms > max_false_alarms) { | |
365 | ||
e1623446 | 366 | IWL_DEBUG_CALIB(priv, "norm FA %u > max FA %u)\n", |
f0832f13 EG |
367 | false_alarms, max_false_alarms); |
368 | ||
369 | val = data->auto_corr_ofdm + AUTO_CORR_STEP_OFDM; | |
370 | data->auto_corr_ofdm = | |
371 | min((u32)ranges->auto_corr_max_ofdm, val); | |
372 | ||
373 | val = data->auto_corr_ofdm_mrc + AUTO_CORR_STEP_OFDM; | |
374 | data->auto_corr_ofdm_mrc = | |
375 | min((u32)ranges->auto_corr_max_ofdm_mrc, val); | |
376 | ||
377 | val = data->auto_corr_ofdm_x1 + AUTO_CORR_STEP_OFDM; | |
378 | data->auto_corr_ofdm_x1 = | |
379 | min((u32)ranges->auto_corr_max_ofdm_x1, val); | |
380 | ||
381 | val = data->auto_corr_ofdm_mrc_x1 + AUTO_CORR_STEP_OFDM; | |
382 | data->auto_corr_ofdm_mrc_x1 = | |
383 | min((u32)ranges->auto_corr_max_ofdm_mrc_x1, val); | |
384 | } | |
385 | ||
386 | /* Else if we got fewer than desired, increase sensitivity */ | |
387 | else if (false_alarms < min_false_alarms) { | |
388 | ||
e1623446 | 389 | IWL_DEBUG_CALIB(priv, "norm FA %u < min FA %u\n", |
f0832f13 EG |
390 | false_alarms, min_false_alarms); |
391 | ||
392 | val = data->auto_corr_ofdm - AUTO_CORR_STEP_OFDM; | |
393 | data->auto_corr_ofdm = | |
394 | max((u32)ranges->auto_corr_min_ofdm, val); | |
395 | ||
396 | val = data->auto_corr_ofdm_mrc - AUTO_CORR_STEP_OFDM; | |
397 | data->auto_corr_ofdm_mrc = | |
398 | max((u32)ranges->auto_corr_min_ofdm_mrc, val); | |
399 | ||
400 | val = data->auto_corr_ofdm_x1 - AUTO_CORR_STEP_OFDM; | |
401 | data->auto_corr_ofdm_x1 = | |
402 | max((u32)ranges->auto_corr_min_ofdm_x1, val); | |
403 | ||
404 | val = data->auto_corr_ofdm_mrc_x1 - AUTO_CORR_STEP_OFDM; | |
405 | data->auto_corr_ofdm_mrc_x1 = | |
406 | max((u32)ranges->auto_corr_min_ofdm_mrc_x1, val); | |
407 | } else { | |
e1623446 | 408 | IWL_DEBUG_CALIB(priv, "min FA %u < norm FA %u < max FA %u OK\n", |
f0832f13 EG |
409 | min_false_alarms, false_alarms, max_false_alarms); |
410 | } | |
411 | return 0; | |
412 | } | |
413 | ||
414 | /* Prepare a SENSITIVITY_CMD, send to uCode if values have changed */ | |
415 | static int iwl_sensitivity_write(struct iwl_priv *priv) | |
416 | { | |
417 | int ret = 0; | |
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 | ||
480 | ret = iwl_send_cmd(priv, &cmd_out); | |
481 | if (ret) | |
15b1687c | 482 | IWL_ERR(priv, "SENSITIVITY_CMD failed\n"); |
f0832f13 EG |
483 | |
484 | return ret; | |
485 | } | |
486 | ||
487 | void iwl_init_sensitivity(struct iwl_priv *priv) | |
488 | { | |
489 | int ret = 0; | |
490 | int i; | |
491 | struct iwl_sensitivity_data *data = NULL; | |
492 | const struct iwl_sensitivity_ranges *ranges = priv->hw_params.sens; | |
493 | ||
445c2dff TW |
494 | if (priv->disable_sens_cal) |
495 | return; | |
496 | ||
e1623446 | 497 | IWL_DEBUG_CALIB(priv, "Start iwl_init_sensitivity\n"); |
f0832f13 EG |
498 | |
499 | /* Clear driver's sensitivity algo data */ | |
500 | data = &(priv->sensitivity_data); | |
501 | ||
502 | if (ranges == NULL) | |
f0832f13 EG |
503 | return; |
504 | ||
505 | memset(data, 0, sizeof(struct iwl_sensitivity_data)); | |
506 | ||
507 | data->num_in_cck_no_fa = 0; | |
508 | data->nrg_curr_state = IWL_FA_TOO_MANY; | |
509 | data->nrg_prev_state = IWL_FA_TOO_MANY; | |
510 | data->nrg_silence_ref = 0; | |
511 | data->nrg_silence_idx = 0; | |
512 | data->nrg_energy_idx = 0; | |
513 | ||
514 | for (i = 0; i < 10; i++) | |
515 | data->nrg_value[i] = 0; | |
516 | ||
517 | for (i = 0; i < NRG_NUM_PREV_STAT_L; i++) | |
518 | data->nrg_silence_rssi[i] = 0; | |
519 | ||
f3a2a424 | 520 | data->auto_corr_ofdm = ranges->auto_corr_min_ofdm; |
f0832f13 EG |
521 | data->auto_corr_ofdm_mrc = ranges->auto_corr_min_ofdm_mrc; |
522 | data->auto_corr_ofdm_x1 = ranges->auto_corr_min_ofdm_x1; | |
523 | data->auto_corr_ofdm_mrc_x1 = ranges->auto_corr_min_ofdm_mrc_x1; | |
524 | data->auto_corr_cck = AUTO_CORR_CCK_MIN_VAL_DEF; | |
525 | data->auto_corr_cck_mrc = ranges->auto_corr_min_cck_mrc; | |
526 | data->nrg_th_cck = ranges->nrg_th_cck; | |
527 | data->nrg_th_ofdm = ranges->nrg_th_ofdm; | |
55036d66 WYG |
528 | data->barker_corr_th_min = ranges->barker_corr_th_min; |
529 | data->barker_corr_th_min_mrc = ranges->barker_corr_th_min_mrc; | |
530 | data->nrg_th_cca = ranges->nrg_th_cca; | |
f0832f13 EG |
531 | |
532 | data->last_bad_plcp_cnt_ofdm = 0; | |
533 | data->last_fa_cnt_ofdm = 0; | |
534 | data->last_bad_plcp_cnt_cck = 0; | |
535 | data->last_fa_cnt_cck = 0; | |
536 | ||
537 | ret |= iwl_sensitivity_write(priv); | |
e1623446 | 538 | IWL_DEBUG_CALIB(priv, "<<return 0x%X\n", ret); |
f0832f13 EG |
539 | } |
540 | EXPORT_SYMBOL(iwl_init_sensitivity); | |
541 | ||
542 | void iwl_sensitivity_calibration(struct iwl_priv *priv, | |
8f91aecb | 543 | struct iwl_notif_statistics *resp) |
f0832f13 EG |
544 | { |
545 | u32 rx_enable_time; | |
546 | u32 fa_cck; | |
547 | u32 fa_ofdm; | |
548 | u32 bad_plcp_cck; | |
549 | u32 bad_plcp_ofdm; | |
550 | u32 norm_fa_ofdm; | |
551 | u32 norm_fa_cck; | |
552 | struct iwl_sensitivity_data *data = NULL; | |
553 | struct statistics_rx_non_phy *rx_info = &(resp->rx.general); | |
554 | struct statistics_rx *statistics = &(resp->rx); | |
555 | unsigned long flags; | |
556 | struct statistics_general_data statis; | |
557 | ||
445c2dff TW |
558 | if (priv->disable_sens_cal) |
559 | return; | |
560 | ||
f0832f13 EG |
561 | data = &(priv->sensitivity_data); |
562 | ||
563 | if (!iwl_is_associated(priv)) { | |
e1623446 | 564 | IWL_DEBUG_CALIB(priv, "<< - not associated\n"); |
f0832f13 EG |
565 | return; |
566 | } | |
567 | ||
568 | spin_lock_irqsave(&priv->lock, flags); | |
569 | if (rx_info->interference_data_flag != INTERFERENCE_DATA_AVAILABLE) { | |
e1623446 | 570 | IWL_DEBUG_CALIB(priv, "<< invalid data.\n"); |
f0832f13 EG |
571 | spin_unlock_irqrestore(&priv->lock, flags); |
572 | return; | |
573 | } | |
574 | ||
575 | /* Extract Statistics: */ | |
576 | rx_enable_time = le32_to_cpu(rx_info->channel_load); | |
577 | fa_cck = le32_to_cpu(statistics->cck.false_alarm_cnt); | |
578 | fa_ofdm = le32_to_cpu(statistics->ofdm.false_alarm_cnt); | |
579 | bad_plcp_cck = le32_to_cpu(statistics->cck.plcp_err); | |
580 | bad_plcp_ofdm = le32_to_cpu(statistics->ofdm.plcp_err); | |
581 | ||
582 | statis.beacon_silence_rssi_a = | |
583 | le32_to_cpu(statistics->general.beacon_silence_rssi_a); | |
584 | statis.beacon_silence_rssi_b = | |
585 | le32_to_cpu(statistics->general.beacon_silence_rssi_b); | |
586 | statis.beacon_silence_rssi_c = | |
587 | le32_to_cpu(statistics->general.beacon_silence_rssi_c); | |
588 | statis.beacon_energy_a = | |
589 | le32_to_cpu(statistics->general.beacon_energy_a); | |
590 | statis.beacon_energy_b = | |
591 | le32_to_cpu(statistics->general.beacon_energy_b); | |
592 | statis.beacon_energy_c = | |
593 | le32_to_cpu(statistics->general.beacon_energy_c); | |
594 | ||
595 | spin_unlock_irqrestore(&priv->lock, flags); | |
596 | ||
e1623446 | 597 | IWL_DEBUG_CALIB(priv, "rx_enable_time = %u usecs\n", rx_enable_time); |
f0832f13 EG |
598 | |
599 | if (!rx_enable_time) { | |
e1623446 | 600 | IWL_DEBUG_CALIB(priv, "<< RX Enable Time == 0! \n"); |
f0832f13 EG |
601 | return; |
602 | } | |
603 | ||
604 | /* These statistics increase monotonically, and do not reset | |
605 | * at each beacon. Calculate difference from last value, or just | |
606 | * use the new statistics value if it has reset or wrapped around. */ | |
607 | if (data->last_bad_plcp_cnt_cck > bad_plcp_cck) | |
608 | data->last_bad_plcp_cnt_cck = bad_plcp_cck; | |
609 | else { | |
610 | bad_plcp_cck -= data->last_bad_plcp_cnt_cck; | |
611 | data->last_bad_plcp_cnt_cck += bad_plcp_cck; | |
612 | } | |
613 | ||
614 | if (data->last_bad_plcp_cnt_ofdm > bad_plcp_ofdm) | |
615 | data->last_bad_plcp_cnt_ofdm = bad_plcp_ofdm; | |
616 | else { | |
617 | bad_plcp_ofdm -= data->last_bad_plcp_cnt_ofdm; | |
618 | data->last_bad_plcp_cnt_ofdm += bad_plcp_ofdm; | |
619 | } | |
620 | ||
621 | if (data->last_fa_cnt_ofdm > fa_ofdm) | |
622 | data->last_fa_cnt_ofdm = fa_ofdm; | |
623 | else { | |
624 | fa_ofdm -= data->last_fa_cnt_ofdm; | |
625 | data->last_fa_cnt_ofdm += fa_ofdm; | |
626 | } | |
627 | ||
628 | if (data->last_fa_cnt_cck > fa_cck) | |
629 | data->last_fa_cnt_cck = fa_cck; | |
630 | else { | |
631 | fa_cck -= data->last_fa_cnt_cck; | |
632 | data->last_fa_cnt_cck += fa_cck; | |
633 | } | |
634 | ||
635 | /* Total aborted signal locks */ | |
636 | norm_fa_ofdm = fa_ofdm + bad_plcp_ofdm; | |
637 | norm_fa_cck = fa_cck + bad_plcp_cck; | |
638 | ||
e1623446 | 639 | IWL_DEBUG_CALIB(priv, "cck: fa %u badp %u ofdm: fa %u badp %u\n", fa_cck, |
f0832f13 EG |
640 | bad_plcp_cck, fa_ofdm, bad_plcp_ofdm); |
641 | ||
642 | iwl_sens_auto_corr_ofdm(priv, norm_fa_ofdm, rx_enable_time); | |
643 | iwl_sens_energy_cck(priv, norm_fa_cck, rx_enable_time, &statis); | |
644 | iwl_sensitivity_write(priv); | |
645 | ||
646 | return; | |
647 | } | |
648 | EXPORT_SYMBOL(iwl_sensitivity_calibration); | |
649 | ||
d8c07e7a WYG |
650 | static inline u8 find_first_chain(u8 mask) |
651 | { | |
652 | if (mask & ANT_A) | |
653 | return CHAIN_A; | |
654 | if (mask & ANT_B) | |
655 | return CHAIN_B; | |
656 | return CHAIN_C; | |
657 | } | |
658 | ||
f0832f13 EG |
659 | /* |
660 | * Accumulate 20 beacons of signal and noise statistics for each of | |
661 | * 3 receivers/antennas/rx-chains, then figure out: | |
662 | * 1) Which antennas are connected. | |
663 | * 2) Differential rx gain settings to balance the 3 receivers. | |
664 | */ | |
665 | void iwl_chain_noise_calibration(struct iwl_priv *priv, | |
8f91aecb | 666 | struct iwl_notif_statistics *stat_resp) |
f0832f13 EG |
667 | { |
668 | struct iwl_chain_noise_data *data = NULL; | |
669 | ||
670 | u32 chain_noise_a; | |
671 | u32 chain_noise_b; | |
672 | u32 chain_noise_c; | |
673 | u32 chain_sig_a; | |
674 | u32 chain_sig_b; | |
675 | u32 chain_sig_c; | |
676 | u32 average_sig[NUM_RX_CHAINS] = {INITIALIZATION_VALUE}; | |
677 | u32 average_noise[NUM_RX_CHAINS] = {INITIALIZATION_VALUE}; | |
678 | u32 max_average_sig; | |
679 | u16 max_average_sig_antenna_i; | |
680 | u32 min_average_noise = MIN_AVERAGE_NOISE_MAX_VALUE; | |
681 | u16 min_average_noise_antenna_i = INITIALIZATION_VALUE; | |
682 | u16 i = 0; | |
683 | u16 rxon_chnum = INITIALIZATION_VALUE; | |
684 | u16 stat_chnum = INITIALIZATION_VALUE; | |
685 | u8 rxon_band24; | |
686 | u8 stat_band24; | |
687 | u32 active_chains = 0; | |
688 | u8 num_tx_chains; | |
689 | unsigned long flags; | |
690 | struct statistics_rx_non_phy *rx_info = &(stat_resp->rx.general); | |
d8c07e7a | 691 | u8 first_chain; |
f0832f13 | 692 | |
445c2dff TW |
693 | if (priv->disable_chain_noise_cal) |
694 | return; | |
695 | ||
f0832f13 EG |
696 | data = &(priv->chain_noise_data); |
697 | ||
d8c07e7a WYG |
698 | /* |
699 | * Accumulate just the first "chain_noise_num_beacons" after | |
700 | * the first association, then we're done forever. | |
701 | */ | |
f0832f13 EG |
702 | if (data->state != IWL_CHAIN_NOISE_ACCUMULATE) { |
703 | if (data->state == IWL_CHAIN_NOISE_ALIVE) | |
e1623446 | 704 | IWL_DEBUG_CALIB(priv, "Wait for noise calib reset\n"); |
f0832f13 EG |
705 | return; |
706 | } | |
707 | ||
708 | spin_lock_irqsave(&priv->lock, flags); | |
709 | if (rx_info->interference_data_flag != INTERFERENCE_DATA_AVAILABLE) { | |
e1623446 | 710 | IWL_DEBUG_CALIB(priv, " << Interference data unavailable\n"); |
f0832f13 EG |
711 | spin_unlock_irqrestore(&priv->lock, flags); |
712 | return; | |
713 | } | |
714 | ||
715 | rxon_band24 = !!(priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK); | |
716 | rxon_chnum = le16_to_cpu(priv->staging_rxon.channel); | |
717 | stat_band24 = !!(stat_resp->flag & STATISTICS_REPLY_FLG_BAND_24G_MSK); | |
718 | stat_chnum = le32_to_cpu(stat_resp->flag) >> 16; | |
719 | ||
720 | /* Make sure we accumulate data for just the associated channel | |
721 | * (even if scanning). */ | |
722 | if ((rxon_chnum != stat_chnum) || (rxon_band24 != stat_band24)) { | |
e1623446 | 723 | IWL_DEBUG_CALIB(priv, "Stats not from chan=%d, band24=%d\n", |
f0832f13 EG |
724 | rxon_chnum, rxon_band24); |
725 | spin_unlock_irqrestore(&priv->lock, flags); | |
726 | return; | |
727 | } | |
728 | ||
d8c07e7a WYG |
729 | /* |
730 | * Accumulate beacon statistics values across | |
731 | * "chain_noise_num_beacons" | |
732 | */ | |
f0832f13 EG |
733 | chain_noise_a = le32_to_cpu(rx_info->beacon_silence_rssi_a) & |
734 | IN_BAND_FILTER; | |
735 | chain_noise_b = le32_to_cpu(rx_info->beacon_silence_rssi_b) & | |
736 | IN_BAND_FILTER; | |
737 | chain_noise_c = le32_to_cpu(rx_info->beacon_silence_rssi_c) & | |
738 | IN_BAND_FILTER; | |
739 | ||
740 | chain_sig_a = le32_to_cpu(rx_info->beacon_rssi_a) & IN_BAND_FILTER; | |
741 | chain_sig_b = le32_to_cpu(rx_info->beacon_rssi_b) & IN_BAND_FILTER; | |
742 | chain_sig_c = le32_to_cpu(rx_info->beacon_rssi_c) & IN_BAND_FILTER; | |
743 | ||
744 | spin_unlock_irqrestore(&priv->lock, flags); | |
745 | ||
746 | data->beacon_count++; | |
747 | ||
748 | data->chain_noise_a = (chain_noise_a + data->chain_noise_a); | |
749 | data->chain_noise_b = (chain_noise_b + data->chain_noise_b); | |
750 | data->chain_noise_c = (chain_noise_c + data->chain_noise_c); | |
751 | ||
752 | data->chain_signal_a = (chain_sig_a + data->chain_signal_a); | |
753 | data->chain_signal_b = (chain_sig_b + data->chain_signal_b); | |
754 | data->chain_signal_c = (chain_sig_c + data->chain_signal_c); | |
755 | ||
e1623446 | 756 | IWL_DEBUG_CALIB(priv, "chan=%d, band24=%d, beacon=%d\n", |
f0832f13 | 757 | rxon_chnum, rxon_band24, data->beacon_count); |
e1623446 | 758 | IWL_DEBUG_CALIB(priv, "chain_sig: a %d b %d c %d\n", |
f0832f13 | 759 | chain_sig_a, chain_sig_b, chain_sig_c); |
e1623446 | 760 | IWL_DEBUG_CALIB(priv, "chain_noise: a %d b %d c %d\n", |
f0832f13 EG |
761 | chain_noise_a, chain_noise_b, chain_noise_c); |
762 | ||
d8c07e7a | 763 | /* If this is the "chain_noise_num_beacons", determine: |
f0832f13 EG |
764 | * 1) Disconnected antennas (using signal strengths) |
765 | * 2) Differential gain (using silence noise) to balance receivers */ | |
d8c07e7a | 766 | if (data->beacon_count != priv->cfg->chain_noise_num_beacons) |
f0832f13 EG |
767 | return; |
768 | ||
769 | /* Analyze signal for disconnected antenna */ | |
d8c07e7a WYG |
770 | average_sig[0] = |
771 | (data->chain_signal_a) / priv->cfg->chain_noise_num_beacons; | |
772 | average_sig[1] = | |
773 | (data->chain_signal_b) / priv->cfg->chain_noise_num_beacons; | |
774 | average_sig[2] = | |
775 | (data->chain_signal_c) / priv->cfg->chain_noise_num_beacons; | |
f0832f13 EG |
776 | |
777 | if (average_sig[0] >= average_sig[1]) { | |
778 | max_average_sig = average_sig[0]; | |
779 | max_average_sig_antenna_i = 0; | |
780 | active_chains = (1 << max_average_sig_antenna_i); | |
781 | } else { | |
782 | max_average_sig = average_sig[1]; | |
783 | max_average_sig_antenna_i = 1; | |
784 | active_chains = (1 << max_average_sig_antenna_i); | |
785 | } | |
786 | ||
787 | if (average_sig[2] >= max_average_sig) { | |
788 | max_average_sig = average_sig[2]; | |
789 | max_average_sig_antenna_i = 2; | |
790 | active_chains = (1 << max_average_sig_antenna_i); | |
791 | } | |
792 | ||
e1623446 | 793 | IWL_DEBUG_CALIB(priv, "average_sig: a %d b %d c %d\n", |
f0832f13 | 794 | average_sig[0], average_sig[1], average_sig[2]); |
e1623446 | 795 | IWL_DEBUG_CALIB(priv, "max_average_sig = %d, antenna %d\n", |
f0832f13 EG |
796 | max_average_sig, max_average_sig_antenna_i); |
797 | ||
798 | /* Compare signal strengths for all 3 receivers. */ | |
799 | for (i = 0; i < NUM_RX_CHAINS; i++) { | |
800 | if (i != max_average_sig_antenna_i) { | |
801 | s32 rssi_delta = (max_average_sig - average_sig[i]); | |
802 | ||
803 | /* If signal is very weak, compared with | |
804 | * strongest, mark it as disconnected. */ | |
805 | if (rssi_delta > MAXIMUM_ALLOWED_PATHLOSS) | |
806 | data->disconn_array[i] = 1; | |
807 | else | |
808 | active_chains |= (1 << i); | |
e1623446 | 809 | IWL_DEBUG_CALIB(priv, "i = %d rssiDelta = %d " |
f0832f13 EG |
810 | "disconn_array[i] = %d\n", |
811 | i, rssi_delta, data->disconn_array[i]); | |
812 | } | |
813 | } | |
814 | ||
815 | num_tx_chains = 0; | |
816 | for (i = 0; i < NUM_RX_CHAINS; i++) { | |
817 | /* loops on all the bits of | |
818 | * priv->hw_setting.valid_tx_ant */ | |
819 | u8 ant_msk = (1 << i); | |
820 | if (!(priv->hw_params.valid_tx_ant & ant_msk)) | |
821 | continue; | |
822 | ||
823 | num_tx_chains++; | |
824 | if (data->disconn_array[i] == 0) | |
825 | /* there is a Tx antenna connected */ | |
826 | break; | |
827 | if (num_tx_chains == priv->hw_params.tx_chains_num && | |
d8c07e7a WYG |
828 | data->disconn_array[i]) { |
829 | /* | |
830 | * If all chains are disconnected | |
831 | * connect the first valid tx chain | |
832 | */ | |
833 | first_chain = | |
834 | find_first_chain(priv->cfg->valid_tx_ant); | |
835 | data->disconn_array[first_chain] = 0; | |
836 | active_chains |= BIT(first_chain); | |
837 | IWL_DEBUG_CALIB(priv, "All Tx chains are disconnected W/A - declare %d as connected\n", | |
838 | first_chain); | |
f0832f13 EG |
839 | break; |
840 | } | |
841 | } | |
842 | ||
04816448 GE |
843 | /* Save for use within RXON, TX, SCAN commands, etc. */ |
844 | priv->chain_noise_data.active_chains = active_chains; | |
e1623446 | 845 | IWL_DEBUG_CALIB(priv, "active_chains (bitwise) = 0x%x\n", |
f0832f13 EG |
846 | active_chains); |
847 | ||
f0832f13 | 848 | /* Analyze noise for rx balance */ |
d8c07e7a WYG |
849 | average_noise[0] = |
850 | ((data->chain_noise_a) / priv->cfg->chain_noise_num_beacons); | |
851 | average_noise[1] = | |
852 | ((data->chain_noise_b) / priv->cfg->chain_noise_num_beacons); | |
853 | average_noise[2] = | |
854 | ((data->chain_noise_c) / priv->cfg->chain_noise_num_beacons); | |
f0832f13 EG |
855 | |
856 | for (i = 0; i < NUM_RX_CHAINS; i++) { | |
857 | if (!(data->disconn_array[i]) && | |
858 | (average_noise[i] <= min_average_noise)) { | |
859 | /* This means that chain i is active and has | |
860 | * lower noise values so far: */ | |
861 | min_average_noise = average_noise[i]; | |
862 | min_average_noise_antenna_i = i; | |
863 | } | |
864 | } | |
865 | ||
e1623446 | 866 | IWL_DEBUG_CALIB(priv, "average_noise: a %d b %d c %d\n", |
f0832f13 EG |
867 | average_noise[0], average_noise[1], |
868 | average_noise[2]); | |
869 | ||
e1623446 | 870 | IWL_DEBUG_CALIB(priv, "min_average_noise = %d, antenna %d\n", |
f0832f13 EG |
871 | min_average_noise, min_average_noise_antenna_i); |
872 | ||
29f35c14 JS |
873 | if (priv->cfg->ops->utils->gain_computation) |
874 | priv->cfg->ops->utils->gain_computation(priv, average_noise, | |
d8c07e7a WYG |
875 | min_average_noise_antenna_i, min_average_noise, |
876 | find_first_chain(priv->cfg->valid_rx_ant)); | |
04816448 GE |
877 | |
878 | /* Some power changes may have been made during the calibration. | |
879 | * Update and commit the RXON | |
880 | */ | |
881 | if (priv->cfg->ops->lib->update_chain_flags) | |
882 | priv->cfg->ops->lib->update_chain_flags(priv); | |
883 | ||
884 | data->state = IWL_CHAIN_NOISE_DONE; | |
e312c24c | 885 | iwl_power_update_mode(priv, false); |
f0832f13 EG |
886 | } |
887 | EXPORT_SYMBOL(iwl_chain_noise_calibration); | |
888 | ||
4a4a9e81 TW |
889 | |
890 | void iwl_reset_run_time_calib(struct iwl_priv *priv) | |
891 | { | |
892 | int i; | |
893 | memset(&(priv->sensitivity_data), 0, | |
894 | sizeof(struct iwl_sensitivity_data)); | |
895 | memset(&(priv->chain_noise_data), 0, | |
896 | sizeof(struct iwl_chain_noise_data)); | |
897 | for (i = 0; i < NUM_RX_CHAINS; i++) | |
898 | priv->chain_noise_data.delta_gain_code[i] = | |
899 | CHAIN_NOISE_DELTA_GAIN_INIT_VAL; | |
900 | ||
901 | /* Ask for statistics now, the uCode will send notification | |
902 | * periodically after association */ | |
ef8d5529 | 903 | iwl_send_statistics_request(priv, CMD_ASYNC, true); |
4a4a9e81 TW |
904 | } |
905 | EXPORT_SYMBOL(iwl_reset_run_time_calib); | |
906 |