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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 | 67 | #include "iwl-core.h" |
0de76736 | 68 | #include "iwl-agn-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); | |
936e8a73 WYG |
99 | if (ret) { |
100 | IWL_ERR(priv, "Error %d iteration %d\n", | |
101 | ret, i); | |
102 | break; | |
103 | } | |
6e21f2c1 | 104 | } |
be5d56ed | 105 | } |
6e21f2c1 | 106 | |
6e21f2c1 TW |
107 | return ret; |
108 | } | |
6e21f2c1 TW |
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 | } | |
6e21f2c1 TW |
123 | |
124 | void iwl_calib_free_results(struct iwl_priv *priv) | |
125 | { | |
126 | int i; | |
127 | ||
128 | for (i = 0; i < IWL_CALIB_MAX; i++) { | |
129 | kfree(priv->calib_results[i].buf); | |
130 | priv->calib_results[i].buf = NULL; | |
131 | priv->calib_results[i].buf_len = 0; | |
132 | } | |
133 | } | |
134 | ||
135 | /***************************************************************************** | |
136 | * RUNTIME calibrations framework | |
137 | *****************************************************************************/ | |
138 | ||
f0832f13 EG |
139 | /* "false alarms" are signals that our DSP tries to lock onto, |
140 | * but then determines that they are either noise, or transmissions | |
141 | * from a distant wireless network (also "noise", really) that get | |
142 | * "stepped on" by stronger transmissions within our own network. | |
143 | * This algorithm attempts to set a sensitivity level that is high | |
144 | * enough to receive all of our own network traffic, but not so | |
145 | * high that our DSP gets too busy trying to lock onto non-network | |
146 | * activity/noise. */ | |
147 | static int iwl_sens_energy_cck(struct iwl_priv *priv, | |
148 | u32 norm_fa, | |
149 | u32 rx_enable_time, | |
150 | struct statistics_general_data *rx_info) | |
151 | { | |
152 | u32 max_nrg_cck = 0; | |
153 | int i = 0; | |
154 | u8 max_silence_rssi = 0; | |
155 | u32 silence_ref = 0; | |
156 | u8 silence_rssi_a = 0; | |
157 | u8 silence_rssi_b = 0; | |
158 | u8 silence_rssi_c = 0; | |
159 | u32 val; | |
160 | ||
161 | /* "false_alarms" values below are cross-multiplications to assess the | |
162 | * numbers of false alarms within the measured period of actual Rx | |
163 | * (Rx is off when we're txing), vs the min/max expected false alarms | |
164 | * (some should be expected if rx is sensitive enough) in a | |
165 | * hypothetical listening period of 200 time units (TU), 204.8 msec: | |
166 | * | |
167 | * MIN_FA/fixed-time < false_alarms/actual-rx-time < MAX_FA/beacon-time | |
168 | * | |
169 | * */ | |
170 | u32 false_alarms = norm_fa * 200 * 1024; | |
171 | u32 max_false_alarms = MAX_FA_CCK * rx_enable_time; | |
172 | u32 min_false_alarms = MIN_FA_CCK * rx_enable_time; | |
173 | struct iwl_sensitivity_data *data = NULL; | |
174 | const struct iwl_sensitivity_ranges *ranges = priv->hw_params.sens; | |
175 | ||
176 | data = &(priv->sensitivity_data); | |
177 | ||
178 | data->nrg_auto_corr_silence_diff = 0; | |
179 | ||
180 | /* Find max silence rssi among all 3 receivers. | |
181 | * This is background noise, which may include transmissions from other | |
182 | * networks, measured during silence before our network's beacon */ | |
183 | silence_rssi_a = (u8)((rx_info->beacon_silence_rssi_a & | |
184 | ALL_BAND_FILTER) >> 8); | |
185 | silence_rssi_b = (u8)((rx_info->beacon_silence_rssi_b & | |
186 | ALL_BAND_FILTER) >> 8); | |
187 | silence_rssi_c = (u8)((rx_info->beacon_silence_rssi_c & | |
188 | ALL_BAND_FILTER) >> 8); | |
189 | ||
190 | val = max(silence_rssi_b, silence_rssi_c); | |
191 | max_silence_rssi = max(silence_rssi_a, (u8) val); | |
192 | ||
193 | /* Store silence rssi in 20-beacon history table */ | |
194 | data->nrg_silence_rssi[data->nrg_silence_idx] = max_silence_rssi; | |
195 | data->nrg_silence_idx++; | |
196 | if (data->nrg_silence_idx >= NRG_NUM_PREV_STAT_L) | |
197 | data->nrg_silence_idx = 0; | |
198 | ||
199 | /* Find max silence rssi across 20 beacon history */ | |
200 | for (i = 0; i < NRG_NUM_PREV_STAT_L; i++) { | |
201 | val = data->nrg_silence_rssi[i]; | |
202 | silence_ref = max(silence_ref, val); | |
203 | } | |
e1623446 | 204 | IWL_DEBUG_CALIB(priv, "silence a %u, b %u, c %u, 20-bcn max %u\n", |
f0832f13 EG |
205 | silence_rssi_a, silence_rssi_b, silence_rssi_c, |
206 | silence_ref); | |
207 | ||
208 | /* Find max rx energy (min value!) among all 3 receivers, | |
209 | * measured during beacon frame. | |
210 | * Save it in 10-beacon history table. */ | |
211 | i = data->nrg_energy_idx; | |
212 | val = min(rx_info->beacon_energy_b, rx_info->beacon_energy_c); | |
213 | data->nrg_value[i] = min(rx_info->beacon_energy_a, val); | |
214 | ||
215 | data->nrg_energy_idx++; | |
216 | if (data->nrg_energy_idx >= 10) | |
217 | data->nrg_energy_idx = 0; | |
218 | ||
219 | /* Find min rx energy (max value) across 10 beacon history. | |
220 | * This is the minimum signal level that we want to receive well. | |
221 | * Add backoff (margin so we don't miss slightly lower energy frames). | |
222 | * This establishes an upper bound (min value) for energy threshold. */ | |
223 | max_nrg_cck = data->nrg_value[0]; | |
224 | for (i = 1; i < 10; i++) | |
225 | max_nrg_cck = (u32) max(max_nrg_cck, (data->nrg_value[i])); | |
226 | max_nrg_cck += 6; | |
227 | ||
e1623446 | 228 | IWL_DEBUG_CALIB(priv, "rx energy a %u, b %u, c %u, 10-bcn max/min %u\n", |
f0832f13 EG |
229 | rx_info->beacon_energy_a, rx_info->beacon_energy_b, |
230 | rx_info->beacon_energy_c, max_nrg_cck - 6); | |
231 | ||
232 | /* Count number of consecutive beacons with fewer-than-desired | |
233 | * false alarms. */ | |
234 | if (false_alarms < min_false_alarms) | |
235 | data->num_in_cck_no_fa++; | |
236 | else | |
237 | data->num_in_cck_no_fa = 0; | |
e1623446 | 238 | IWL_DEBUG_CALIB(priv, "consecutive bcns with few false alarms = %u\n", |
f0832f13 EG |
239 | data->num_in_cck_no_fa); |
240 | ||
241 | /* If we got too many false alarms this time, reduce sensitivity */ | |
242 | if ((false_alarms > max_false_alarms) && | |
243 | (data->auto_corr_cck > AUTO_CORR_MAX_TH_CCK)) { | |
e1623446 | 244 | IWL_DEBUG_CALIB(priv, "norm FA %u > max FA %u\n", |
f0832f13 | 245 | false_alarms, max_false_alarms); |
e1623446 | 246 | IWL_DEBUG_CALIB(priv, "... reducing sensitivity\n"); |
f0832f13 EG |
247 | data->nrg_curr_state = IWL_FA_TOO_MANY; |
248 | /* Store for "fewer than desired" on later beacon */ | |
249 | data->nrg_silence_ref = silence_ref; | |
250 | ||
251 | /* increase energy threshold (reduce nrg value) | |
252 | * to decrease sensitivity */ | |
fe6efb4b | 253 | data->nrg_th_cck = data->nrg_th_cck - NRG_STEP_CCK; |
f0832f13 EG |
254 | /* Else if we got fewer than desired, increase sensitivity */ |
255 | } else if (false_alarms < min_false_alarms) { | |
256 | data->nrg_curr_state = IWL_FA_TOO_FEW; | |
257 | ||
258 | /* Compare silence level with silence level for most recent | |
259 | * healthy number or too many false alarms */ | |
260 | data->nrg_auto_corr_silence_diff = (s32)data->nrg_silence_ref - | |
261 | (s32)silence_ref; | |
262 | ||
e1623446 | 263 | IWL_DEBUG_CALIB(priv, "norm FA %u < min FA %u, silence diff %d\n", |
f0832f13 EG |
264 | false_alarms, min_false_alarms, |
265 | data->nrg_auto_corr_silence_diff); | |
266 | ||
267 | /* Increase value to increase sensitivity, but only if: | |
268 | * 1a) previous beacon did *not* have *too many* false alarms | |
269 | * 1b) AND there's a significant difference in Rx levels | |
270 | * from a previous beacon with too many, or healthy # FAs | |
271 | * OR 2) We've seen a lot of beacons (100) with too few | |
272 | * false alarms */ | |
273 | if ((data->nrg_prev_state != IWL_FA_TOO_MANY) && | |
274 | ((data->nrg_auto_corr_silence_diff > NRG_DIFF) || | |
275 | (data->num_in_cck_no_fa > MAX_NUMBER_CCK_NO_FA))) { | |
276 | ||
e1623446 | 277 | IWL_DEBUG_CALIB(priv, "... increasing sensitivity\n"); |
f0832f13 EG |
278 | /* Increase nrg value to increase sensitivity */ |
279 | val = data->nrg_th_cck + NRG_STEP_CCK; | |
280 | data->nrg_th_cck = min((u32)ranges->min_nrg_cck, val); | |
281 | } else { | |
e1623446 | 282 | IWL_DEBUG_CALIB(priv, "... but not changing sensitivity\n"); |
f0832f13 EG |
283 | } |
284 | ||
285 | /* Else we got a healthy number of false alarms, keep status quo */ | |
286 | } else { | |
e1623446 | 287 | IWL_DEBUG_CALIB(priv, " FA in safe zone\n"); |
f0832f13 EG |
288 | data->nrg_curr_state = IWL_FA_GOOD_RANGE; |
289 | ||
290 | /* Store for use in "fewer than desired" with later beacon */ | |
291 | data->nrg_silence_ref = silence_ref; | |
292 | ||
293 | /* If previous beacon had too many false alarms, | |
294 | * give it some extra margin by reducing sensitivity again | |
295 | * (but don't go below measured energy of desired Rx) */ | |
296 | if (IWL_FA_TOO_MANY == data->nrg_prev_state) { | |
e1623446 | 297 | IWL_DEBUG_CALIB(priv, "... increasing margin\n"); |
f0832f13 EG |
298 | if (data->nrg_th_cck > (max_nrg_cck + NRG_MARGIN)) |
299 | data->nrg_th_cck -= NRG_MARGIN; | |
300 | else | |
301 | data->nrg_th_cck = max_nrg_cck; | |
302 | } | |
303 | } | |
304 | ||
305 | /* Make sure the energy threshold does not go above the measured | |
306 | * energy of the desired Rx signals (reduced by backoff margin), | |
307 | * or else we might start missing Rx frames. | |
308 | * Lower value is higher energy, so we use max()! | |
309 | */ | |
310 | data->nrg_th_cck = max(max_nrg_cck, data->nrg_th_cck); | |
e1623446 | 311 | IWL_DEBUG_CALIB(priv, "new nrg_th_cck %u\n", data->nrg_th_cck); |
f0832f13 EG |
312 | |
313 | data->nrg_prev_state = data->nrg_curr_state; | |
314 | ||
315 | /* Auto-correlation CCK algorithm */ | |
316 | if (false_alarms > min_false_alarms) { | |
317 | ||
318 | /* increase auto_corr values to decrease sensitivity | |
319 | * so the DSP won't be disturbed by the noise | |
320 | */ | |
321 | if (data->auto_corr_cck < AUTO_CORR_MAX_TH_CCK) | |
322 | data->auto_corr_cck = AUTO_CORR_MAX_TH_CCK + 1; | |
323 | else { | |
324 | val = data->auto_corr_cck + AUTO_CORR_STEP_CCK; | |
325 | data->auto_corr_cck = | |
326 | min((u32)ranges->auto_corr_max_cck, val); | |
327 | } | |
328 | val = data->auto_corr_cck_mrc + AUTO_CORR_STEP_CCK; | |
329 | data->auto_corr_cck_mrc = | |
330 | min((u32)ranges->auto_corr_max_cck_mrc, val); | |
331 | } else if ((false_alarms < min_false_alarms) && | |
332 | ((data->nrg_auto_corr_silence_diff > NRG_DIFF) || | |
333 | (data->num_in_cck_no_fa > MAX_NUMBER_CCK_NO_FA))) { | |
334 | ||
335 | /* Decrease auto_corr values to increase sensitivity */ | |
336 | val = data->auto_corr_cck - AUTO_CORR_STEP_CCK; | |
337 | data->auto_corr_cck = | |
338 | max((u32)ranges->auto_corr_min_cck, val); | |
339 | val = data->auto_corr_cck_mrc - AUTO_CORR_STEP_CCK; | |
340 | data->auto_corr_cck_mrc = | |
341 | max((u32)ranges->auto_corr_min_cck_mrc, val); | |
342 | } | |
343 | ||
344 | return 0; | |
345 | } | |
346 | ||
347 | ||
348 | static int iwl_sens_auto_corr_ofdm(struct iwl_priv *priv, | |
349 | u32 norm_fa, | |
350 | u32 rx_enable_time) | |
351 | { | |
352 | u32 val; | |
353 | u32 false_alarms = norm_fa * 200 * 1024; | |
354 | u32 max_false_alarms = MAX_FA_OFDM * rx_enable_time; | |
355 | u32 min_false_alarms = MIN_FA_OFDM * rx_enable_time; | |
356 | struct iwl_sensitivity_data *data = NULL; | |
357 | const struct iwl_sensitivity_ranges *ranges = priv->hw_params.sens; | |
358 | ||
359 | data = &(priv->sensitivity_data); | |
360 | ||
361 | /* If we got too many false alarms this time, reduce sensitivity */ | |
362 | if (false_alarms > max_false_alarms) { | |
363 | ||
e1623446 | 364 | IWL_DEBUG_CALIB(priv, "norm FA %u > max FA %u)\n", |
f0832f13 EG |
365 | false_alarms, max_false_alarms); |
366 | ||
367 | val = data->auto_corr_ofdm + AUTO_CORR_STEP_OFDM; | |
368 | data->auto_corr_ofdm = | |
369 | min((u32)ranges->auto_corr_max_ofdm, val); | |
370 | ||
371 | val = data->auto_corr_ofdm_mrc + AUTO_CORR_STEP_OFDM; | |
372 | data->auto_corr_ofdm_mrc = | |
373 | min((u32)ranges->auto_corr_max_ofdm_mrc, val); | |
374 | ||
375 | val = data->auto_corr_ofdm_x1 + AUTO_CORR_STEP_OFDM; | |
376 | data->auto_corr_ofdm_x1 = | |
377 | min((u32)ranges->auto_corr_max_ofdm_x1, val); | |
378 | ||
379 | val = data->auto_corr_ofdm_mrc_x1 + AUTO_CORR_STEP_OFDM; | |
380 | data->auto_corr_ofdm_mrc_x1 = | |
381 | min((u32)ranges->auto_corr_max_ofdm_mrc_x1, val); | |
382 | } | |
383 | ||
384 | /* Else if we got fewer than desired, increase sensitivity */ | |
385 | else if (false_alarms < min_false_alarms) { | |
386 | ||
e1623446 | 387 | IWL_DEBUG_CALIB(priv, "norm FA %u < min FA %u\n", |
f0832f13 EG |
388 | false_alarms, min_false_alarms); |
389 | ||
390 | val = data->auto_corr_ofdm - AUTO_CORR_STEP_OFDM; | |
391 | data->auto_corr_ofdm = | |
392 | max((u32)ranges->auto_corr_min_ofdm, val); | |
393 | ||
394 | val = data->auto_corr_ofdm_mrc - AUTO_CORR_STEP_OFDM; | |
395 | data->auto_corr_ofdm_mrc = | |
396 | max((u32)ranges->auto_corr_min_ofdm_mrc, val); | |
397 | ||
398 | val = data->auto_corr_ofdm_x1 - AUTO_CORR_STEP_OFDM; | |
399 | data->auto_corr_ofdm_x1 = | |
400 | max((u32)ranges->auto_corr_min_ofdm_x1, val); | |
401 | ||
402 | val = data->auto_corr_ofdm_mrc_x1 - AUTO_CORR_STEP_OFDM; | |
403 | data->auto_corr_ofdm_mrc_x1 = | |
404 | max((u32)ranges->auto_corr_min_ofdm_mrc_x1, val); | |
405 | } else { | |
e1623446 | 406 | IWL_DEBUG_CALIB(priv, "min FA %u < norm FA %u < max FA %u OK\n", |
f0832f13 EG |
407 | min_false_alarms, false_alarms, max_false_alarms); |
408 | } | |
409 | return 0; | |
410 | } | |
411 | ||
c8312fac WYG |
412 | static void iwl_prepare_legacy_sensitivity_tbl(struct iwl_priv *priv, |
413 | struct iwl_sensitivity_data *data, | |
414 | __le16 *tbl) | |
f0832f13 | 415 | { |
c8312fac | 416 | tbl[HD_AUTO_CORR32_X4_TH_ADD_MIN_INDEX] = |
f0832f13 | 417 | cpu_to_le16((u16)data->auto_corr_ofdm); |
c8312fac | 418 | tbl[HD_AUTO_CORR32_X4_TH_ADD_MIN_MRC_INDEX] = |
f0832f13 | 419 | cpu_to_le16((u16)data->auto_corr_ofdm_mrc); |
c8312fac | 420 | tbl[HD_AUTO_CORR32_X1_TH_ADD_MIN_INDEX] = |
f0832f13 | 421 | cpu_to_le16((u16)data->auto_corr_ofdm_x1); |
c8312fac | 422 | tbl[HD_AUTO_CORR32_X1_TH_ADD_MIN_MRC_INDEX] = |
f0832f13 EG |
423 | cpu_to_le16((u16)data->auto_corr_ofdm_mrc_x1); |
424 | ||
c8312fac | 425 | tbl[HD_AUTO_CORR40_X4_TH_ADD_MIN_INDEX] = |
f0832f13 | 426 | cpu_to_le16((u16)data->auto_corr_cck); |
c8312fac | 427 | tbl[HD_AUTO_CORR40_X4_TH_ADD_MIN_MRC_INDEX] = |
f0832f13 EG |
428 | cpu_to_le16((u16)data->auto_corr_cck_mrc); |
429 | ||
c8312fac | 430 | tbl[HD_MIN_ENERGY_CCK_DET_INDEX] = |
f0832f13 | 431 | cpu_to_le16((u16)data->nrg_th_cck); |
c8312fac | 432 | tbl[HD_MIN_ENERGY_OFDM_DET_INDEX] = |
f0832f13 EG |
433 | cpu_to_le16((u16)data->nrg_th_ofdm); |
434 | ||
c8312fac | 435 | tbl[HD_BARKER_CORR_TH_ADD_MIN_INDEX] = |
55036d66 | 436 | cpu_to_le16(data->barker_corr_th_min); |
c8312fac | 437 | tbl[HD_BARKER_CORR_TH_ADD_MIN_MRC_INDEX] = |
55036d66 | 438 | cpu_to_le16(data->barker_corr_th_min_mrc); |
c8312fac | 439 | tbl[HD_OFDM_ENERGY_TH_IN_INDEX] = |
55036d66 | 440 | cpu_to_le16(data->nrg_th_cca); |
f0832f13 | 441 | |
e1623446 | 442 | IWL_DEBUG_CALIB(priv, "ofdm: ac %u mrc %u x1 %u mrc_x1 %u thresh %u\n", |
f0832f13 EG |
443 | data->auto_corr_ofdm, data->auto_corr_ofdm_mrc, |
444 | data->auto_corr_ofdm_x1, data->auto_corr_ofdm_mrc_x1, | |
445 | data->nrg_th_ofdm); | |
446 | ||
e1623446 | 447 | IWL_DEBUG_CALIB(priv, "cck: ac %u mrc %u thresh %u\n", |
f0832f13 EG |
448 | data->auto_corr_cck, data->auto_corr_cck_mrc, |
449 | data->nrg_th_cck); | |
c8312fac WYG |
450 | } |
451 | ||
452 | /* Prepare a SENSITIVITY_CMD, send to uCode if values have changed */ | |
453 | static int iwl_sensitivity_write(struct iwl_priv *priv) | |
454 | { | |
455 | struct iwl_sensitivity_cmd cmd; | |
456 | struct iwl_sensitivity_data *data = NULL; | |
457 | struct iwl_host_cmd cmd_out = { | |
458 | .id = SENSITIVITY_CMD, | |
459 | .len = sizeof(struct iwl_sensitivity_cmd), | |
460 | .flags = CMD_ASYNC, | |
461 | .data = &cmd, | |
462 | }; | |
463 | ||
464 | data = &(priv->sensitivity_data); | |
465 | ||
466 | memset(&cmd, 0, sizeof(cmd)); | |
467 | ||
468 | iwl_prepare_legacy_sensitivity_tbl(priv, data, &cmd.table[0]); | |
f0832f13 EG |
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 | ||
4309af27 | 484 | return iwl_send_cmd(priv, &cmd_out); |
f0832f13 EG |
485 | } |
486 | ||
c8312fac WYG |
487 | /* Prepare a SENSITIVITY_CMD, send to uCode if values have changed */ |
488 | static int iwl_enhance_sensitivity_write(struct iwl_priv *priv) | |
489 | { | |
490 | struct iwl_enhance_sensitivity_cmd cmd; | |
491 | struct iwl_sensitivity_data *data = NULL; | |
492 | struct iwl_host_cmd cmd_out = { | |
493 | .id = SENSITIVITY_CMD, | |
494 | .len = sizeof(struct iwl_enhance_sensitivity_cmd), | |
495 | .flags = CMD_ASYNC, | |
496 | .data = &cmd, | |
497 | }; | |
498 | ||
499 | data = &(priv->sensitivity_data); | |
500 | ||
501 | memset(&cmd, 0, sizeof(cmd)); | |
502 | ||
503 | iwl_prepare_legacy_sensitivity_tbl(priv, data, &cmd.enhance_table[0]); | |
504 | ||
505 | cmd.enhance_table[HD_INA_NON_SQUARE_DET_OFDM_INDEX] = | |
506 | HD_INA_NON_SQUARE_DET_OFDM_DATA; | |
507 | cmd.enhance_table[HD_INA_NON_SQUARE_DET_CCK_INDEX] = | |
508 | HD_INA_NON_SQUARE_DET_CCK_DATA; | |
509 | cmd.enhance_table[HD_CORR_11_INSTEAD_OF_CORR_9_EN_INDEX] = | |
510 | HD_CORR_11_INSTEAD_OF_CORR_9_EN_DATA; | |
511 | cmd.enhance_table[HD_OFDM_NON_SQUARE_DET_SLOPE_MRC_INDEX] = | |
512 | HD_OFDM_NON_SQUARE_DET_SLOPE_MRC_DATA; | |
513 | cmd.enhance_table[HD_OFDM_NON_SQUARE_DET_INTERCEPT_MRC_INDEX] = | |
514 | HD_OFDM_NON_SQUARE_DET_INTERCEPT_MRC_DATA; | |
515 | cmd.enhance_table[HD_OFDM_NON_SQUARE_DET_SLOPE_INDEX] = | |
516 | HD_OFDM_NON_SQUARE_DET_SLOPE_DATA; | |
517 | cmd.enhance_table[HD_OFDM_NON_SQUARE_DET_INTERCEPT_INDEX] = | |
518 | HD_OFDM_NON_SQUARE_DET_INTERCEPT_DATA; | |
519 | cmd.enhance_table[HD_CCK_NON_SQUARE_DET_SLOPE_MRC_INDEX] = | |
520 | HD_CCK_NON_SQUARE_DET_SLOPE_MRC_DATA; | |
521 | cmd.enhance_table[HD_CCK_NON_SQUARE_DET_INTERCEPT_MRC_INDEX] = | |
522 | HD_CCK_NON_SQUARE_DET_INTERCEPT_MRC_DATA; | |
523 | cmd.enhance_table[HD_CCK_NON_SQUARE_DET_SLOPE_INDEX] = | |
524 | HD_CCK_NON_SQUARE_DET_SLOPE_DATA; | |
525 | cmd.enhance_table[HD_CCK_NON_SQUARE_DET_INTERCEPT_INDEX] = | |
526 | HD_CCK_NON_SQUARE_DET_INTERCEPT_DATA; | |
527 | ||
528 | /* Update uCode's "work" table, and copy it to DSP */ | |
529 | cmd.control = SENSITIVITY_CMD_CONTROL_WORK_TABLE; | |
530 | ||
531 | /* Don't send command to uCode if nothing has changed */ | |
532 | if (!memcmp(&cmd.enhance_table[0], &(priv->sensitivity_tbl[0]), | |
533 | sizeof(u16)*HD_TABLE_SIZE) && | |
534 | !memcmp(&cmd.enhance_table[HD_INA_NON_SQUARE_DET_OFDM_INDEX], | |
535 | &(priv->enhance_sensitivity_tbl[0]), | |
536 | sizeof(u16)*ENHANCE_HD_TABLE_ENTRIES)) { | |
537 | IWL_DEBUG_CALIB(priv, "No change in SENSITIVITY_CMD\n"); | |
538 | return 0; | |
539 | } | |
540 | ||
541 | /* Copy table for comparison next time */ | |
542 | memcpy(&(priv->sensitivity_tbl[0]), &(cmd.enhance_table[0]), | |
543 | sizeof(u16)*HD_TABLE_SIZE); | |
544 | memcpy(&(priv->enhance_sensitivity_tbl[0]), | |
545 | &(cmd.enhance_table[HD_INA_NON_SQUARE_DET_OFDM_INDEX]), | |
546 | sizeof(u16)*ENHANCE_HD_TABLE_ENTRIES); | |
547 | ||
548 | return iwl_send_cmd(priv, &cmd_out); | |
549 | } | |
550 | ||
f0832f13 EG |
551 | void iwl_init_sensitivity(struct iwl_priv *priv) |
552 | { | |
553 | int ret = 0; | |
554 | int i; | |
555 | struct iwl_sensitivity_data *data = NULL; | |
556 | const struct iwl_sensitivity_ranges *ranges = priv->hw_params.sens; | |
557 | ||
445c2dff TW |
558 | if (priv->disable_sens_cal) |
559 | return; | |
560 | ||
e1623446 | 561 | IWL_DEBUG_CALIB(priv, "Start iwl_init_sensitivity\n"); |
f0832f13 EG |
562 | |
563 | /* Clear driver's sensitivity algo data */ | |
564 | data = &(priv->sensitivity_data); | |
565 | ||
566 | if (ranges == NULL) | |
f0832f13 EG |
567 | return; |
568 | ||
569 | memset(data, 0, sizeof(struct iwl_sensitivity_data)); | |
570 | ||
571 | data->num_in_cck_no_fa = 0; | |
572 | data->nrg_curr_state = IWL_FA_TOO_MANY; | |
573 | data->nrg_prev_state = IWL_FA_TOO_MANY; | |
574 | data->nrg_silence_ref = 0; | |
575 | data->nrg_silence_idx = 0; | |
576 | data->nrg_energy_idx = 0; | |
577 | ||
578 | for (i = 0; i < 10; i++) | |
579 | data->nrg_value[i] = 0; | |
580 | ||
581 | for (i = 0; i < NRG_NUM_PREV_STAT_L; i++) | |
582 | data->nrg_silence_rssi[i] = 0; | |
583 | ||
f3a2a424 | 584 | data->auto_corr_ofdm = ranges->auto_corr_min_ofdm; |
f0832f13 EG |
585 | data->auto_corr_ofdm_mrc = ranges->auto_corr_min_ofdm_mrc; |
586 | data->auto_corr_ofdm_x1 = ranges->auto_corr_min_ofdm_x1; | |
587 | data->auto_corr_ofdm_mrc_x1 = ranges->auto_corr_min_ofdm_mrc_x1; | |
588 | data->auto_corr_cck = AUTO_CORR_CCK_MIN_VAL_DEF; | |
589 | data->auto_corr_cck_mrc = ranges->auto_corr_min_cck_mrc; | |
590 | data->nrg_th_cck = ranges->nrg_th_cck; | |
591 | data->nrg_th_ofdm = ranges->nrg_th_ofdm; | |
55036d66 WYG |
592 | data->barker_corr_th_min = ranges->barker_corr_th_min; |
593 | data->barker_corr_th_min_mrc = ranges->barker_corr_th_min_mrc; | |
594 | data->nrg_th_cca = ranges->nrg_th_cca; | |
f0832f13 EG |
595 | |
596 | data->last_bad_plcp_cnt_ofdm = 0; | |
597 | data->last_fa_cnt_ofdm = 0; | |
598 | data->last_bad_plcp_cnt_cck = 0; | |
599 | data->last_fa_cnt_cck = 0; | |
600 | ||
c8312fac WYG |
601 | if (priv->enhance_sensitivity_table) |
602 | ret |= iwl_enhance_sensitivity_write(priv); | |
603 | else | |
604 | ret |= iwl_sensitivity_write(priv); | |
e1623446 | 605 | IWL_DEBUG_CALIB(priv, "<<return 0x%X\n", ret); |
f0832f13 | 606 | } |
f0832f13 | 607 | |
7980fba5 | 608 | void iwl_sensitivity_calibration(struct iwl_priv *priv, void *resp) |
f0832f13 EG |
609 | { |
610 | u32 rx_enable_time; | |
611 | u32 fa_cck; | |
612 | u32 fa_ofdm; | |
613 | u32 bad_plcp_cck; | |
614 | u32 bad_plcp_ofdm; | |
615 | u32 norm_fa_ofdm; | |
616 | u32 norm_fa_cck; | |
617 | struct iwl_sensitivity_data *data = NULL; | |
7980fba5 WYG |
618 | struct statistics_rx_non_phy *rx_info; |
619 | struct statistics_rx_phy *ofdm, *cck; | |
f0832f13 EG |
620 | unsigned long flags; |
621 | struct statistics_general_data statis; | |
622 | ||
445c2dff TW |
623 | if (priv->disable_sens_cal) |
624 | return; | |
625 | ||
f0832f13 EG |
626 | data = &(priv->sensitivity_data); |
627 | ||
246ed355 | 628 | if (!iwl_is_any_associated(priv)) { |
e1623446 | 629 | IWL_DEBUG_CALIB(priv, "<< - not associated\n"); |
f0832f13 EG |
630 | return; |
631 | } | |
632 | ||
633 | spin_lock_irqsave(&priv->lock, flags); | |
7cb1b088 WYG |
634 | if (priv->cfg->bt_params && |
635 | priv->cfg->bt_params->bt_statistics) { | |
7980fba5 WYG |
636 | rx_info = &(((struct iwl_bt_notif_statistics *)resp)-> |
637 | rx.general.common); | |
638 | ofdm = &(((struct iwl_bt_notif_statistics *)resp)->rx.ofdm); | |
639 | cck = &(((struct iwl_bt_notif_statistics *)resp)->rx.cck); | |
640 | } else { | |
641 | rx_info = &(((struct iwl_notif_statistics *)resp)->rx.general); | |
642 | ofdm = &(((struct iwl_notif_statistics *)resp)->rx.ofdm); | |
643 | cck = &(((struct iwl_notif_statistics *)resp)->rx.cck); | |
644 | } | |
f0832f13 | 645 | if (rx_info->interference_data_flag != INTERFERENCE_DATA_AVAILABLE) { |
e1623446 | 646 | IWL_DEBUG_CALIB(priv, "<< invalid data.\n"); |
f0832f13 EG |
647 | spin_unlock_irqrestore(&priv->lock, flags); |
648 | return; | |
649 | } | |
650 | ||
651 | /* Extract Statistics: */ | |
652 | rx_enable_time = le32_to_cpu(rx_info->channel_load); | |
7980fba5 WYG |
653 | fa_cck = le32_to_cpu(cck->false_alarm_cnt); |
654 | fa_ofdm = le32_to_cpu(ofdm->false_alarm_cnt); | |
655 | bad_plcp_cck = le32_to_cpu(cck->plcp_err); | |
656 | bad_plcp_ofdm = le32_to_cpu(ofdm->plcp_err); | |
f0832f13 EG |
657 | |
658 | statis.beacon_silence_rssi_a = | |
7980fba5 | 659 | le32_to_cpu(rx_info->beacon_silence_rssi_a); |
f0832f13 | 660 | statis.beacon_silence_rssi_b = |
7980fba5 | 661 | le32_to_cpu(rx_info->beacon_silence_rssi_b); |
f0832f13 | 662 | statis.beacon_silence_rssi_c = |
7980fba5 | 663 | le32_to_cpu(rx_info->beacon_silence_rssi_c); |
f0832f13 | 664 | statis.beacon_energy_a = |
7980fba5 | 665 | le32_to_cpu(rx_info->beacon_energy_a); |
f0832f13 | 666 | statis.beacon_energy_b = |
7980fba5 | 667 | le32_to_cpu(rx_info->beacon_energy_b); |
f0832f13 | 668 | statis.beacon_energy_c = |
7980fba5 | 669 | le32_to_cpu(rx_info->beacon_energy_c); |
f0832f13 EG |
670 | |
671 | spin_unlock_irqrestore(&priv->lock, flags); | |
672 | ||
e1623446 | 673 | IWL_DEBUG_CALIB(priv, "rx_enable_time = %u usecs\n", rx_enable_time); |
f0832f13 EG |
674 | |
675 | if (!rx_enable_time) { | |
91dd6c27 | 676 | IWL_DEBUG_CALIB(priv, "<< RX Enable Time == 0!\n"); |
f0832f13 EG |
677 | return; |
678 | } | |
679 | ||
680 | /* These statistics increase monotonically, and do not reset | |
681 | * at each beacon. Calculate difference from last value, or just | |
682 | * use the new statistics value if it has reset or wrapped around. */ | |
683 | if (data->last_bad_plcp_cnt_cck > bad_plcp_cck) | |
684 | data->last_bad_plcp_cnt_cck = bad_plcp_cck; | |
685 | else { | |
686 | bad_plcp_cck -= data->last_bad_plcp_cnt_cck; | |
687 | data->last_bad_plcp_cnt_cck += bad_plcp_cck; | |
688 | } | |
689 | ||
690 | if (data->last_bad_plcp_cnt_ofdm > bad_plcp_ofdm) | |
691 | data->last_bad_plcp_cnt_ofdm = bad_plcp_ofdm; | |
692 | else { | |
693 | bad_plcp_ofdm -= data->last_bad_plcp_cnt_ofdm; | |
694 | data->last_bad_plcp_cnt_ofdm += bad_plcp_ofdm; | |
695 | } | |
696 | ||
697 | if (data->last_fa_cnt_ofdm > fa_ofdm) | |
698 | data->last_fa_cnt_ofdm = fa_ofdm; | |
699 | else { | |
700 | fa_ofdm -= data->last_fa_cnt_ofdm; | |
701 | data->last_fa_cnt_ofdm += fa_ofdm; | |
702 | } | |
703 | ||
704 | if (data->last_fa_cnt_cck > fa_cck) | |
705 | data->last_fa_cnt_cck = fa_cck; | |
706 | else { | |
707 | fa_cck -= data->last_fa_cnt_cck; | |
708 | data->last_fa_cnt_cck += fa_cck; | |
709 | } | |
710 | ||
711 | /* Total aborted signal locks */ | |
712 | norm_fa_ofdm = fa_ofdm + bad_plcp_ofdm; | |
713 | norm_fa_cck = fa_cck + bad_plcp_cck; | |
714 | ||
e1623446 | 715 | IWL_DEBUG_CALIB(priv, "cck: fa %u badp %u ofdm: fa %u badp %u\n", fa_cck, |
f0832f13 EG |
716 | bad_plcp_cck, fa_ofdm, bad_plcp_ofdm); |
717 | ||
718 | iwl_sens_auto_corr_ofdm(priv, norm_fa_ofdm, rx_enable_time); | |
719 | iwl_sens_energy_cck(priv, norm_fa_cck, rx_enable_time, &statis); | |
c8312fac WYG |
720 | if (priv->enhance_sensitivity_table) |
721 | iwl_enhance_sensitivity_write(priv); | |
722 | else | |
723 | iwl_sensitivity_write(priv); | |
f0832f13 | 724 | } |
f0832f13 | 725 | |
d8c07e7a WYG |
726 | static inline u8 find_first_chain(u8 mask) |
727 | { | |
728 | if (mask & ANT_A) | |
729 | return CHAIN_A; | |
730 | if (mask & ANT_B) | |
731 | return CHAIN_B; | |
732 | return CHAIN_C; | |
733 | } | |
734 | ||
3031242b SZ |
735 | /** |
736 | * Run disconnected antenna algorithm to find out which antennas are | |
737 | * disconnected. | |
738 | */ | |
739 | static void iwl_find_disconn_antenna(struct iwl_priv *priv, u32* average_sig, | |
740 | struct iwl_chain_noise_data *data) | |
741 | { | |
742 | u32 active_chains = 0; | |
743 | u32 max_average_sig; | |
744 | u16 max_average_sig_antenna_i; | |
745 | u8 num_tx_chains; | |
746 | u8 first_chain; | |
747 | u16 i = 0; | |
748 | ||
749 | average_sig[0] = data->chain_signal_a / | |
750 | priv->cfg->base_params->chain_noise_num_beacons; | |
751 | average_sig[1] = data->chain_signal_b / | |
752 | priv->cfg->base_params->chain_noise_num_beacons; | |
753 | average_sig[2] = data->chain_signal_c / | |
754 | priv->cfg->base_params->chain_noise_num_beacons; | |
755 | ||
756 | if (average_sig[0] >= average_sig[1]) { | |
757 | max_average_sig = average_sig[0]; | |
758 | max_average_sig_antenna_i = 0; | |
759 | active_chains = (1 << max_average_sig_antenna_i); | |
760 | } else { | |
761 | max_average_sig = average_sig[1]; | |
762 | max_average_sig_antenna_i = 1; | |
763 | active_chains = (1 << max_average_sig_antenna_i); | |
764 | } | |
765 | ||
766 | if (average_sig[2] >= max_average_sig) { | |
767 | max_average_sig = average_sig[2]; | |
768 | max_average_sig_antenna_i = 2; | |
769 | active_chains = (1 << max_average_sig_antenna_i); | |
770 | } | |
771 | ||
772 | IWL_DEBUG_CALIB(priv, "average_sig: a %d b %d c %d\n", | |
773 | average_sig[0], average_sig[1], average_sig[2]); | |
774 | IWL_DEBUG_CALIB(priv, "max_average_sig = %d, antenna %d\n", | |
775 | max_average_sig, max_average_sig_antenna_i); | |
776 | ||
777 | /* Compare signal strengths for all 3 receivers. */ | |
778 | for (i = 0; i < NUM_RX_CHAINS; i++) { | |
779 | if (i != max_average_sig_antenna_i) { | |
780 | s32 rssi_delta = (max_average_sig - average_sig[i]); | |
781 | ||
782 | /* If signal is very weak, compared with | |
783 | * strongest, mark it as disconnected. */ | |
784 | if (rssi_delta > MAXIMUM_ALLOWED_PATHLOSS) | |
785 | data->disconn_array[i] = 1; | |
786 | else | |
787 | active_chains |= (1 << i); | |
788 | IWL_DEBUG_CALIB(priv, "i = %d rssiDelta = %d " | |
789 | "disconn_array[i] = %d\n", | |
790 | i, rssi_delta, data->disconn_array[i]); | |
791 | } | |
792 | } | |
793 | ||
794 | /* | |
795 | * The above algorithm sometimes fails when the ucode | |
796 | * reports 0 for all chains. It's not clear why that | |
797 | * happens to start with, but it is then causing trouble | |
798 | * because this can make us enable more chains than the | |
799 | * hardware really has. | |
800 | * | |
801 | * To be safe, simply mask out any chains that we know | |
802 | * are not on the device. | |
803 | */ | |
6fe8efb2 | 804 | active_chains &= priv->hw_params.valid_rx_ant; |
3031242b SZ |
805 | |
806 | num_tx_chains = 0; | |
807 | for (i = 0; i < NUM_RX_CHAINS; i++) { | |
808 | /* loops on all the bits of | |
809 | * priv->hw_setting.valid_tx_ant */ | |
810 | u8 ant_msk = (1 << i); | |
811 | if (!(priv->hw_params.valid_tx_ant & ant_msk)) | |
812 | continue; | |
813 | ||
814 | num_tx_chains++; | |
815 | if (data->disconn_array[i] == 0) | |
816 | /* there is a Tx antenna connected */ | |
817 | break; | |
818 | if (num_tx_chains == priv->hw_params.tx_chains_num && | |
819 | data->disconn_array[i]) { | |
820 | /* | |
821 | * If all chains are disconnected | |
822 | * connect the first valid tx chain | |
823 | */ | |
824 | first_chain = | |
825 | find_first_chain(priv->cfg->valid_tx_ant); | |
826 | data->disconn_array[first_chain] = 0; | |
827 | active_chains |= BIT(first_chain); | |
828 | IWL_DEBUG_CALIB(priv, "All Tx chains are disconnected \ | |
829 | W/A - declare %d as connected\n", | |
830 | first_chain); | |
831 | break; | |
832 | } | |
833 | } | |
834 | ||
835 | if (active_chains != priv->hw_params.valid_rx_ant && | |
836 | active_chains != priv->chain_noise_data.active_chains) | |
837 | IWL_DEBUG_CALIB(priv, | |
838 | "Detected that not all antennas are connected! " | |
839 | "Connected: %#x, valid: %#x.\n", | |
840 | active_chains, priv->hw_params.valid_rx_ant); | |
841 | ||
842 | /* Save for use within RXON, TX, SCAN commands, etc. */ | |
843 | data->active_chains = active_chains; | |
844 | IWL_DEBUG_CALIB(priv, "active_chains (bitwise) = 0x%x\n", | |
845 | active_chains); | |
846 | } | |
847 | ||
848 | ||
f0832f13 | 849 | /* |
3031242b | 850 | * Accumulate 16 beacons of signal and noise statistics for each of |
f0832f13 EG |
851 | * 3 receivers/antennas/rx-chains, then figure out: |
852 | * 1) Which antennas are connected. | |
853 | * 2) Differential rx gain settings to balance the 3 receivers. | |
854 | */ | |
7980fba5 | 855 | void iwl_chain_noise_calibration(struct iwl_priv *priv, void *stat_resp) |
f0832f13 EG |
856 | { |
857 | struct iwl_chain_noise_data *data = NULL; | |
858 | ||
859 | u32 chain_noise_a; | |
860 | u32 chain_noise_b; | |
861 | u32 chain_noise_c; | |
862 | u32 chain_sig_a; | |
863 | u32 chain_sig_b; | |
864 | u32 chain_sig_c; | |
865 | u32 average_sig[NUM_RX_CHAINS] = {INITIALIZATION_VALUE}; | |
866 | u32 average_noise[NUM_RX_CHAINS] = {INITIALIZATION_VALUE}; | |
f0832f13 EG |
867 | u32 min_average_noise = MIN_AVERAGE_NOISE_MAX_VALUE; |
868 | u16 min_average_noise_antenna_i = INITIALIZATION_VALUE; | |
869 | u16 i = 0; | |
870 | u16 rxon_chnum = INITIALIZATION_VALUE; | |
871 | u16 stat_chnum = INITIALIZATION_VALUE; | |
872 | u8 rxon_band24; | |
873 | u8 stat_band24; | |
f0832f13 | 874 | unsigned long flags; |
7980fba5 | 875 | struct statistics_rx_non_phy *rx_info; |
3031242b | 876 | |
246ed355 JB |
877 | /* |
878 | * MULTI-FIXME: | |
879 | * When we support multiple interfaces on different channels, | |
880 | * this must be modified/fixed. | |
881 | */ | |
882 | struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS]; | |
f0832f13 | 883 | |
445c2dff TW |
884 | if (priv->disable_chain_noise_cal) |
885 | return; | |
886 | ||
f0832f13 EG |
887 | data = &(priv->chain_noise_data); |
888 | ||
d8c07e7a WYG |
889 | /* |
890 | * Accumulate just the first "chain_noise_num_beacons" after | |
891 | * the first association, then we're done forever. | |
892 | */ | |
f0832f13 EG |
893 | if (data->state != IWL_CHAIN_NOISE_ACCUMULATE) { |
894 | if (data->state == IWL_CHAIN_NOISE_ALIVE) | |
e1623446 | 895 | IWL_DEBUG_CALIB(priv, "Wait for noise calib reset\n"); |
f0832f13 EG |
896 | return; |
897 | } | |
898 | ||
899 | spin_lock_irqsave(&priv->lock, flags); | |
7cb1b088 WYG |
900 | if (priv->cfg->bt_params && |
901 | priv->cfg->bt_params->bt_statistics) { | |
7980fba5 WYG |
902 | rx_info = &(((struct iwl_bt_notif_statistics *)stat_resp)-> |
903 | rx.general.common); | |
904 | } else { | |
905 | rx_info = &(((struct iwl_notif_statistics *)stat_resp)-> | |
906 | rx.general); | |
907 | } | |
f0832f13 | 908 | if (rx_info->interference_data_flag != INTERFERENCE_DATA_AVAILABLE) { |
e1623446 | 909 | IWL_DEBUG_CALIB(priv, " << Interference data unavailable\n"); |
f0832f13 EG |
910 | spin_unlock_irqrestore(&priv->lock, flags); |
911 | return; | |
912 | } | |
913 | ||
246ed355 JB |
914 | rxon_band24 = !!(ctx->staging.flags & RXON_FLG_BAND_24G_MSK); |
915 | rxon_chnum = le16_to_cpu(ctx->staging.channel); | |
7cb1b088 WYG |
916 | if (priv->cfg->bt_params && |
917 | priv->cfg->bt_params->bt_statistics) { | |
7980fba5 WYG |
918 | stat_band24 = !!(((struct iwl_bt_notif_statistics *) |
919 | stat_resp)->flag & | |
920 | STATISTICS_REPLY_FLG_BAND_24G_MSK); | |
921 | stat_chnum = le32_to_cpu(((struct iwl_bt_notif_statistics *) | |
922 | stat_resp)->flag) >> 16; | |
923 | } else { | |
924 | stat_band24 = !!(((struct iwl_notif_statistics *) | |
925 | stat_resp)->flag & | |
926 | STATISTICS_REPLY_FLG_BAND_24G_MSK); | |
927 | stat_chnum = le32_to_cpu(((struct iwl_notif_statistics *) | |
928 | stat_resp)->flag) >> 16; | |
929 | } | |
f0832f13 EG |
930 | |
931 | /* Make sure we accumulate data for just the associated channel | |
932 | * (even if scanning). */ | |
933 | if ((rxon_chnum != stat_chnum) || (rxon_band24 != stat_band24)) { | |
e1623446 | 934 | IWL_DEBUG_CALIB(priv, "Stats not from chan=%d, band24=%d\n", |
f0832f13 EG |
935 | rxon_chnum, rxon_band24); |
936 | spin_unlock_irqrestore(&priv->lock, flags); | |
937 | return; | |
938 | } | |
939 | ||
d8c07e7a WYG |
940 | /* |
941 | * Accumulate beacon statistics values across | |
942 | * "chain_noise_num_beacons" | |
943 | */ | |
f0832f13 EG |
944 | chain_noise_a = le32_to_cpu(rx_info->beacon_silence_rssi_a) & |
945 | IN_BAND_FILTER; | |
946 | chain_noise_b = le32_to_cpu(rx_info->beacon_silence_rssi_b) & | |
947 | IN_BAND_FILTER; | |
948 | chain_noise_c = le32_to_cpu(rx_info->beacon_silence_rssi_c) & | |
949 | IN_BAND_FILTER; | |
950 | ||
951 | chain_sig_a = le32_to_cpu(rx_info->beacon_rssi_a) & IN_BAND_FILTER; | |
952 | chain_sig_b = le32_to_cpu(rx_info->beacon_rssi_b) & IN_BAND_FILTER; | |
953 | chain_sig_c = le32_to_cpu(rx_info->beacon_rssi_c) & IN_BAND_FILTER; | |
954 | ||
955 | spin_unlock_irqrestore(&priv->lock, flags); | |
956 | ||
957 | data->beacon_count++; | |
958 | ||
959 | data->chain_noise_a = (chain_noise_a + data->chain_noise_a); | |
960 | data->chain_noise_b = (chain_noise_b + data->chain_noise_b); | |
961 | data->chain_noise_c = (chain_noise_c + data->chain_noise_c); | |
962 | ||
963 | data->chain_signal_a = (chain_sig_a + data->chain_signal_a); | |
964 | data->chain_signal_b = (chain_sig_b + data->chain_signal_b); | |
965 | data->chain_signal_c = (chain_sig_c + data->chain_signal_c); | |
966 | ||
e1623446 | 967 | IWL_DEBUG_CALIB(priv, "chan=%d, band24=%d, beacon=%d\n", |
f0832f13 | 968 | rxon_chnum, rxon_band24, data->beacon_count); |
e1623446 | 969 | IWL_DEBUG_CALIB(priv, "chain_sig: a %d b %d c %d\n", |
f0832f13 | 970 | chain_sig_a, chain_sig_b, chain_sig_c); |
e1623446 | 971 | IWL_DEBUG_CALIB(priv, "chain_noise: a %d b %d c %d\n", |
f0832f13 EG |
972 | chain_noise_a, chain_noise_b, chain_noise_c); |
973 | ||
d8c07e7a | 974 | /* If this is the "chain_noise_num_beacons", determine: |
f0832f13 EG |
975 | * 1) Disconnected antennas (using signal strengths) |
976 | * 2) Differential gain (using silence noise) to balance receivers */ | |
7cb1b088 WYG |
977 | if (data->beacon_count != |
978 | priv->cfg->base_params->chain_noise_num_beacons) | |
f0832f13 EG |
979 | return; |
980 | ||
981 | /* Analyze signal for disconnected antenna */ | |
6fe8efb2 SZ |
982 | if (priv->cfg->bt_params && |
983 | priv->cfg->bt_params->advanced_bt_coexist) { | |
984 | /* Disable disconnected antenna algorithm for advanced | |
985 | bt coex, assuming valid antennas are connected */ | |
986 | data->active_chains = priv->hw_params.valid_rx_ant; | |
987 | for (i = 0; i < NUM_RX_CHAINS; i++) | |
988 | if (!(data->active_chains & (1<<i))) | |
989 | data->disconn_array[i] = 1; | |
990 | } else | |
991 | iwl_find_disconn_antenna(priv, average_sig, data); | |
f0832f13 | 992 | |
f0832f13 | 993 | /* Analyze noise for rx balance */ |
7cb1b088 WYG |
994 | average_noise[0] = data->chain_noise_a / |
995 | priv->cfg->base_params->chain_noise_num_beacons; | |
996 | average_noise[1] = data->chain_noise_b / | |
997 | priv->cfg->base_params->chain_noise_num_beacons; | |
998 | average_noise[2] = data->chain_noise_c / | |
999 | priv->cfg->base_params->chain_noise_num_beacons; | |
f0832f13 EG |
1000 | |
1001 | for (i = 0; i < NUM_RX_CHAINS; i++) { | |
1002 | if (!(data->disconn_array[i]) && | |
1003 | (average_noise[i] <= min_average_noise)) { | |
1004 | /* This means that chain i is active and has | |
1005 | * lower noise values so far: */ | |
1006 | min_average_noise = average_noise[i]; | |
1007 | min_average_noise_antenna_i = i; | |
1008 | } | |
1009 | } | |
1010 | ||
e1623446 | 1011 | IWL_DEBUG_CALIB(priv, "average_noise: a %d b %d c %d\n", |
f0832f13 EG |
1012 | average_noise[0], average_noise[1], |
1013 | average_noise[2]); | |
1014 | ||
e1623446 | 1015 | IWL_DEBUG_CALIB(priv, "min_average_noise = %d, antenna %d\n", |
f0832f13 EG |
1016 | min_average_noise, min_average_noise_antenna_i); |
1017 | ||
29f35c14 JS |
1018 | if (priv->cfg->ops->utils->gain_computation) |
1019 | priv->cfg->ops->utils->gain_computation(priv, average_noise, | |
d8c07e7a WYG |
1020 | min_average_noise_antenna_i, min_average_noise, |
1021 | find_first_chain(priv->cfg->valid_rx_ant)); | |
04816448 GE |
1022 | |
1023 | /* Some power changes may have been made during the calibration. | |
1024 | * Update and commit the RXON | |
1025 | */ | |
1026 | if (priv->cfg->ops->lib->update_chain_flags) | |
1027 | priv->cfg->ops->lib->update_chain_flags(priv); | |
1028 | ||
1029 | data->state = IWL_CHAIN_NOISE_DONE; | |
e312c24c | 1030 | iwl_power_update_mode(priv, false); |
f0832f13 | 1031 | } |
4a4a9e81 TW |
1032 | |
1033 | void iwl_reset_run_time_calib(struct iwl_priv *priv) | |
1034 | { | |
1035 | int i; | |
1036 | memset(&(priv->sensitivity_data), 0, | |
1037 | sizeof(struct iwl_sensitivity_data)); | |
1038 | memset(&(priv->chain_noise_data), 0, | |
1039 | sizeof(struct iwl_chain_noise_data)); | |
1040 | for (i = 0; i < NUM_RX_CHAINS; i++) | |
1041 | priv->chain_noise_data.delta_gain_code[i] = | |
1042 | CHAIN_NOISE_DELTA_GAIN_INIT_VAL; | |
1043 | ||
1044 | /* Ask for statistics now, the uCode will send notification | |
1045 | * periodically after association */ | |
ef8d5529 | 1046 | iwl_send_statistics_request(priv, CMD_ASYNC, true); |
4a4a9e81 | 1047 | } |