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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 | * | |
fb4961db | 8 | * Copyright(c) 2008 - 2012 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 | * | |
fb4961db | 33 | * Copyright(c) 2005 - 2012 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" |
bdfbf092 | 69 | #include "iwl-trans.h" |
5c3d29fc | 70 | #include "iwl-agn.h" |
f0832f13 | 71 | |
6e21f2c1 TW |
72 | /***************************************************************************** |
73 | * INIT calibrations framework | |
74 | *****************************************************************************/ | |
75 | ||
e1991885 JB |
76 | /* Opaque calibration results */ |
77 | struct iwl_calib_result { | |
78 | struct list_head list; | |
79 | size_t cmd_len; | |
80 | struct iwl_calib_hdr hdr; | |
81 | /* data follows */ | |
82 | }; | |
83 | ||
34c22cf9 WT |
84 | struct statistics_general_data { |
85 | u32 beacon_silence_rssi_a; | |
86 | u32 beacon_silence_rssi_b; | |
87 | u32 beacon_silence_rssi_c; | |
88 | u32 beacon_energy_a; | |
89 | u32 beacon_energy_b; | |
90 | u32 beacon_energy_c; | |
91 | }; | |
92 | ||
e1991885 | 93 | int iwl_send_calib_results(struct iwl_priv *priv) |
6e21f2c1 | 94 | { |
6e21f2c1 TW |
95 | struct iwl_host_cmd hcmd = { |
96 | .id = REPLY_PHY_CALIBRATION_CMD, | |
e419d62d | 97 | .flags = CMD_SYNC, |
6e21f2c1 | 98 | }; |
f02c2fd3 | 99 | struct iwl_calib_result *res; |
6e21f2c1 | 100 | |
e1991885 | 101 | list_for_each_entry(res, &priv->calib_results, list) { |
93b64105 JB |
102 | int ret; |
103 | ||
f02c2fd3 JB |
104 | hcmd.len[0] = res->cmd_len; |
105 | hcmd.data[0] = &res->hdr; | |
93b64105 | 106 | hcmd.dataflags[0] = IWL_HCMD_DFL_NOCOPY; |
e10a0533 | 107 | ret = iwl_dvm_send_cmd(priv, &hcmd); |
93b64105 | 108 | if (ret) { |
e1991885 | 109 | IWL_ERR(priv, "Error %d on calib cmd %d\n", |
f02c2fd3 | 110 | ret, res->hdr.op_code); |
93b64105 | 111 | return ret; |
6e21f2c1 | 112 | } |
be5d56ed | 113 | } |
6e21f2c1 | 114 | |
93b64105 | 115 | return 0; |
6e21f2c1 | 116 | } |
6e21f2c1 | 117 | |
e1991885 | 118 | int iwl_calib_set(struct iwl_priv *priv, |
f02c2fd3 | 119 | const struct iwl_calib_hdr *cmd, int len) |
6e21f2c1 | 120 | { |
f02c2fd3 JB |
121 | struct iwl_calib_result *res, *tmp; |
122 | ||
123 | res = kmalloc(sizeof(*res) + len - sizeof(struct iwl_calib_hdr), | |
124 | GFP_ATOMIC); | |
125 | if (!res) | |
6e21f2c1 | 126 | return -ENOMEM; |
f02c2fd3 JB |
127 | memcpy(&res->hdr, cmd, len); |
128 | res->cmd_len = len; | |
129 | ||
e1991885 | 130 | list_for_each_entry(tmp, &priv->calib_results, list) { |
f02c2fd3 JB |
131 | if (tmp->hdr.op_code == res->hdr.op_code) { |
132 | list_replace(&tmp->list, &res->list); | |
133 | kfree(tmp); | |
134 | return 0; | |
135 | } | |
136 | } | |
137 | ||
138 | /* wasn't in list already */ | |
e1991885 | 139 | list_add_tail(&res->list, &priv->calib_results); |
6e21f2c1 | 140 | |
6e21f2c1 TW |
141 | return 0; |
142 | } | |
6e21f2c1 | 143 | |
e1991885 | 144 | void iwl_calib_free_results(struct iwl_priv *priv) |
6e21f2c1 | 145 | { |
f02c2fd3 | 146 | struct iwl_calib_result *res, *tmp; |
6e21f2c1 | 147 | |
e1991885 | 148 | list_for_each_entry_safe(res, tmp, &priv->calib_results, list) { |
f02c2fd3 JB |
149 | list_del(&res->list); |
150 | kfree(res); | |
6e21f2c1 TW |
151 | } |
152 | } | |
153 | ||
154 | /***************************************************************************** | |
155 | * RUNTIME calibrations framework | |
156 | *****************************************************************************/ | |
157 | ||
f0832f13 EG |
158 | /* "false alarms" are signals that our DSP tries to lock onto, |
159 | * but then determines that they are either noise, or transmissions | |
160 | * from a distant wireless network (also "noise", really) that get | |
161 | * "stepped on" by stronger transmissions within our own network. | |
162 | * This algorithm attempts to set a sensitivity level that is high | |
163 | * enough to receive all of our own network traffic, but not so | |
164 | * high that our DSP gets too busy trying to lock onto non-network | |
165 | * activity/noise. */ | |
166 | static int iwl_sens_energy_cck(struct iwl_priv *priv, | |
167 | u32 norm_fa, | |
168 | u32 rx_enable_time, | |
169 | struct statistics_general_data *rx_info) | |
170 | { | |
171 | u32 max_nrg_cck = 0; | |
172 | int i = 0; | |
173 | u8 max_silence_rssi = 0; | |
174 | u32 silence_ref = 0; | |
175 | u8 silence_rssi_a = 0; | |
176 | u8 silence_rssi_b = 0; | |
177 | u8 silence_rssi_c = 0; | |
178 | u32 val; | |
179 | ||
180 | /* "false_alarms" values below are cross-multiplications to assess the | |
181 | * numbers of false alarms within the measured period of actual Rx | |
182 | * (Rx is off when we're txing), vs the min/max expected false alarms | |
183 | * (some should be expected if rx is sensitive enough) in a | |
184 | * hypothetical listening period of 200 time units (TU), 204.8 msec: | |
185 | * | |
186 | * MIN_FA/fixed-time < false_alarms/actual-rx-time < MAX_FA/beacon-time | |
187 | * | |
188 | * */ | |
189 | u32 false_alarms = norm_fa * 200 * 1024; | |
190 | u32 max_false_alarms = MAX_FA_CCK * rx_enable_time; | |
191 | u32 min_false_alarms = MIN_FA_CCK * rx_enable_time; | |
192 | struct iwl_sensitivity_data *data = NULL; | |
9e295116 | 193 | const struct iwl_sensitivity_ranges *ranges = priv->hw_params.sens; |
f0832f13 EG |
194 | |
195 | data = &(priv->sensitivity_data); | |
196 | ||
197 | data->nrg_auto_corr_silence_diff = 0; | |
198 | ||
199 | /* Find max silence rssi among all 3 receivers. | |
200 | * This is background noise, which may include transmissions from other | |
201 | * networks, measured during silence before our network's beacon */ | |
202 | silence_rssi_a = (u8)((rx_info->beacon_silence_rssi_a & | |
203 | ALL_BAND_FILTER) >> 8); | |
204 | silence_rssi_b = (u8)((rx_info->beacon_silence_rssi_b & | |
205 | ALL_BAND_FILTER) >> 8); | |
206 | silence_rssi_c = (u8)((rx_info->beacon_silence_rssi_c & | |
207 | ALL_BAND_FILTER) >> 8); | |
208 | ||
209 | val = max(silence_rssi_b, silence_rssi_c); | |
210 | max_silence_rssi = max(silence_rssi_a, (u8) val); | |
211 | ||
212 | /* Store silence rssi in 20-beacon history table */ | |
213 | data->nrg_silence_rssi[data->nrg_silence_idx] = max_silence_rssi; | |
214 | data->nrg_silence_idx++; | |
215 | if (data->nrg_silence_idx >= NRG_NUM_PREV_STAT_L) | |
216 | data->nrg_silence_idx = 0; | |
217 | ||
218 | /* Find max silence rssi across 20 beacon history */ | |
219 | for (i = 0; i < NRG_NUM_PREV_STAT_L; i++) { | |
220 | val = data->nrg_silence_rssi[i]; | |
221 | silence_ref = max(silence_ref, val); | |
222 | } | |
e1623446 | 223 | IWL_DEBUG_CALIB(priv, "silence a %u, b %u, c %u, 20-bcn max %u\n", |
f0832f13 EG |
224 | silence_rssi_a, silence_rssi_b, silence_rssi_c, |
225 | silence_ref); | |
226 | ||
227 | /* Find max rx energy (min value!) among all 3 receivers, | |
228 | * measured during beacon frame. | |
229 | * Save it in 10-beacon history table. */ | |
230 | i = data->nrg_energy_idx; | |
231 | val = min(rx_info->beacon_energy_b, rx_info->beacon_energy_c); | |
232 | data->nrg_value[i] = min(rx_info->beacon_energy_a, val); | |
233 | ||
234 | data->nrg_energy_idx++; | |
235 | if (data->nrg_energy_idx >= 10) | |
236 | data->nrg_energy_idx = 0; | |
237 | ||
238 | /* Find min rx energy (max value) across 10 beacon history. | |
239 | * This is the minimum signal level that we want to receive well. | |
240 | * Add backoff (margin so we don't miss slightly lower energy frames). | |
241 | * This establishes an upper bound (min value) for energy threshold. */ | |
242 | max_nrg_cck = data->nrg_value[0]; | |
243 | for (i = 1; i < 10; i++) | |
244 | max_nrg_cck = (u32) max(max_nrg_cck, (data->nrg_value[i])); | |
245 | max_nrg_cck += 6; | |
246 | ||
e1623446 | 247 | IWL_DEBUG_CALIB(priv, "rx energy a %u, b %u, c %u, 10-bcn max/min %u\n", |
f0832f13 EG |
248 | rx_info->beacon_energy_a, rx_info->beacon_energy_b, |
249 | rx_info->beacon_energy_c, max_nrg_cck - 6); | |
250 | ||
251 | /* Count number of consecutive beacons with fewer-than-desired | |
252 | * false alarms. */ | |
253 | if (false_alarms < min_false_alarms) | |
254 | data->num_in_cck_no_fa++; | |
255 | else | |
256 | data->num_in_cck_no_fa = 0; | |
e1623446 | 257 | IWL_DEBUG_CALIB(priv, "consecutive bcns with few false alarms = %u\n", |
f0832f13 EG |
258 | data->num_in_cck_no_fa); |
259 | ||
260 | /* If we got too many false alarms this time, reduce sensitivity */ | |
261 | if ((false_alarms > max_false_alarms) && | |
262 | (data->auto_corr_cck > AUTO_CORR_MAX_TH_CCK)) { | |
e1623446 | 263 | IWL_DEBUG_CALIB(priv, "norm FA %u > max FA %u\n", |
f0832f13 | 264 | false_alarms, max_false_alarms); |
e1623446 | 265 | IWL_DEBUG_CALIB(priv, "... reducing sensitivity\n"); |
f0832f13 EG |
266 | data->nrg_curr_state = IWL_FA_TOO_MANY; |
267 | /* Store for "fewer than desired" on later beacon */ | |
268 | data->nrg_silence_ref = silence_ref; | |
269 | ||
270 | /* increase energy threshold (reduce nrg value) | |
271 | * to decrease sensitivity */ | |
fe6efb4b | 272 | data->nrg_th_cck = data->nrg_th_cck - NRG_STEP_CCK; |
f0832f13 EG |
273 | /* Else if we got fewer than desired, increase sensitivity */ |
274 | } else if (false_alarms < min_false_alarms) { | |
275 | data->nrg_curr_state = IWL_FA_TOO_FEW; | |
276 | ||
277 | /* Compare silence level with silence level for most recent | |
278 | * healthy number or too many false alarms */ | |
279 | data->nrg_auto_corr_silence_diff = (s32)data->nrg_silence_ref - | |
280 | (s32)silence_ref; | |
281 | ||
e1623446 | 282 | IWL_DEBUG_CALIB(priv, "norm FA %u < min FA %u, silence diff %d\n", |
f0832f13 EG |
283 | false_alarms, min_false_alarms, |
284 | data->nrg_auto_corr_silence_diff); | |
285 | ||
286 | /* Increase value to increase sensitivity, but only if: | |
287 | * 1a) previous beacon did *not* have *too many* false alarms | |
288 | * 1b) AND there's a significant difference in Rx levels | |
289 | * from a previous beacon with too many, or healthy # FAs | |
290 | * OR 2) We've seen a lot of beacons (100) with too few | |
291 | * false alarms */ | |
292 | if ((data->nrg_prev_state != IWL_FA_TOO_MANY) && | |
293 | ((data->nrg_auto_corr_silence_diff > NRG_DIFF) || | |
294 | (data->num_in_cck_no_fa > MAX_NUMBER_CCK_NO_FA))) { | |
295 | ||
e1623446 | 296 | IWL_DEBUG_CALIB(priv, "... increasing sensitivity\n"); |
f0832f13 EG |
297 | /* Increase nrg value to increase sensitivity */ |
298 | val = data->nrg_th_cck + NRG_STEP_CCK; | |
299 | data->nrg_th_cck = min((u32)ranges->min_nrg_cck, val); | |
300 | } else { | |
e1623446 | 301 | IWL_DEBUG_CALIB(priv, "... but not changing sensitivity\n"); |
f0832f13 EG |
302 | } |
303 | ||
304 | /* Else we got a healthy number of false alarms, keep status quo */ | |
305 | } else { | |
e1623446 | 306 | IWL_DEBUG_CALIB(priv, " FA in safe zone\n"); |
f0832f13 EG |
307 | data->nrg_curr_state = IWL_FA_GOOD_RANGE; |
308 | ||
309 | /* Store for use in "fewer than desired" with later beacon */ | |
310 | data->nrg_silence_ref = silence_ref; | |
311 | ||
312 | /* If previous beacon had too many false alarms, | |
313 | * give it some extra margin by reducing sensitivity again | |
314 | * (but don't go below measured energy of desired Rx) */ | |
315 | if (IWL_FA_TOO_MANY == data->nrg_prev_state) { | |
e1623446 | 316 | IWL_DEBUG_CALIB(priv, "... increasing margin\n"); |
f0832f13 EG |
317 | if (data->nrg_th_cck > (max_nrg_cck + NRG_MARGIN)) |
318 | data->nrg_th_cck -= NRG_MARGIN; | |
319 | else | |
320 | data->nrg_th_cck = max_nrg_cck; | |
321 | } | |
322 | } | |
323 | ||
324 | /* Make sure the energy threshold does not go above the measured | |
325 | * energy of the desired Rx signals (reduced by backoff margin), | |
326 | * or else we might start missing Rx frames. | |
327 | * Lower value is higher energy, so we use max()! | |
328 | */ | |
329 | data->nrg_th_cck = max(max_nrg_cck, data->nrg_th_cck); | |
e1623446 | 330 | IWL_DEBUG_CALIB(priv, "new nrg_th_cck %u\n", data->nrg_th_cck); |
f0832f13 EG |
331 | |
332 | data->nrg_prev_state = data->nrg_curr_state; | |
333 | ||
334 | /* Auto-correlation CCK algorithm */ | |
335 | if (false_alarms > min_false_alarms) { | |
336 | ||
337 | /* increase auto_corr values to decrease sensitivity | |
338 | * so the DSP won't be disturbed by the noise | |
339 | */ | |
340 | if (data->auto_corr_cck < AUTO_CORR_MAX_TH_CCK) | |
341 | data->auto_corr_cck = AUTO_CORR_MAX_TH_CCK + 1; | |
342 | else { | |
343 | val = data->auto_corr_cck + AUTO_CORR_STEP_CCK; | |
344 | data->auto_corr_cck = | |
345 | min((u32)ranges->auto_corr_max_cck, val); | |
346 | } | |
347 | val = data->auto_corr_cck_mrc + AUTO_CORR_STEP_CCK; | |
348 | data->auto_corr_cck_mrc = | |
349 | min((u32)ranges->auto_corr_max_cck_mrc, val); | |
350 | } else if ((false_alarms < min_false_alarms) && | |
351 | ((data->nrg_auto_corr_silence_diff > NRG_DIFF) || | |
352 | (data->num_in_cck_no_fa > MAX_NUMBER_CCK_NO_FA))) { | |
353 | ||
354 | /* Decrease auto_corr values to increase sensitivity */ | |
355 | val = data->auto_corr_cck - AUTO_CORR_STEP_CCK; | |
356 | data->auto_corr_cck = | |
357 | max((u32)ranges->auto_corr_min_cck, val); | |
358 | val = data->auto_corr_cck_mrc - AUTO_CORR_STEP_CCK; | |
359 | data->auto_corr_cck_mrc = | |
360 | max((u32)ranges->auto_corr_min_cck_mrc, val); | |
361 | } | |
362 | ||
363 | return 0; | |
364 | } | |
365 | ||
366 | ||
367 | static int iwl_sens_auto_corr_ofdm(struct iwl_priv *priv, | |
368 | u32 norm_fa, | |
369 | u32 rx_enable_time) | |
370 | { | |
371 | u32 val; | |
372 | u32 false_alarms = norm_fa * 200 * 1024; | |
373 | u32 max_false_alarms = MAX_FA_OFDM * rx_enable_time; | |
374 | u32 min_false_alarms = MIN_FA_OFDM * rx_enable_time; | |
375 | struct iwl_sensitivity_data *data = NULL; | |
9e295116 | 376 | const struct iwl_sensitivity_ranges *ranges = priv->hw_params.sens; |
f0832f13 EG |
377 | |
378 | data = &(priv->sensitivity_data); | |
379 | ||
380 | /* If we got too many false alarms this time, reduce sensitivity */ | |
381 | if (false_alarms > max_false_alarms) { | |
382 | ||
e1623446 | 383 | IWL_DEBUG_CALIB(priv, "norm FA %u > max FA %u)\n", |
f0832f13 EG |
384 | false_alarms, max_false_alarms); |
385 | ||
386 | val = data->auto_corr_ofdm + AUTO_CORR_STEP_OFDM; | |
387 | data->auto_corr_ofdm = | |
388 | min((u32)ranges->auto_corr_max_ofdm, val); | |
389 | ||
390 | val = data->auto_corr_ofdm_mrc + AUTO_CORR_STEP_OFDM; | |
391 | data->auto_corr_ofdm_mrc = | |
392 | min((u32)ranges->auto_corr_max_ofdm_mrc, val); | |
393 | ||
394 | val = data->auto_corr_ofdm_x1 + AUTO_CORR_STEP_OFDM; | |
395 | data->auto_corr_ofdm_x1 = | |
396 | min((u32)ranges->auto_corr_max_ofdm_x1, val); | |
397 | ||
398 | val = data->auto_corr_ofdm_mrc_x1 + AUTO_CORR_STEP_OFDM; | |
399 | data->auto_corr_ofdm_mrc_x1 = | |
400 | min((u32)ranges->auto_corr_max_ofdm_mrc_x1, val); | |
401 | } | |
402 | ||
403 | /* Else if we got fewer than desired, increase sensitivity */ | |
404 | else if (false_alarms < min_false_alarms) { | |
405 | ||
e1623446 | 406 | IWL_DEBUG_CALIB(priv, "norm FA %u < min FA %u\n", |
f0832f13 EG |
407 | false_alarms, min_false_alarms); |
408 | ||
409 | val = data->auto_corr_ofdm - AUTO_CORR_STEP_OFDM; | |
410 | data->auto_corr_ofdm = | |
411 | max((u32)ranges->auto_corr_min_ofdm, val); | |
412 | ||
413 | val = data->auto_corr_ofdm_mrc - AUTO_CORR_STEP_OFDM; | |
414 | data->auto_corr_ofdm_mrc = | |
415 | max((u32)ranges->auto_corr_min_ofdm_mrc, val); | |
416 | ||
417 | val = data->auto_corr_ofdm_x1 - AUTO_CORR_STEP_OFDM; | |
418 | data->auto_corr_ofdm_x1 = | |
419 | max((u32)ranges->auto_corr_min_ofdm_x1, val); | |
420 | ||
421 | val = data->auto_corr_ofdm_mrc_x1 - AUTO_CORR_STEP_OFDM; | |
422 | data->auto_corr_ofdm_mrc_x1 = | |
423 | max((u32)ranges->auto_corr_min_ofdm_mrc_x1, val); | |
424 | } else { | |
e1623446 | 425 | IWL_DEBUG_CALIB(priv, "min FA %u < norm FA %u < max FA %u OK\n", |
f0832f13 EG |
426 | min_false_alarms, false_alarms, max_false_alarms); |
427 | } | |
428 | return 0; | |
429 | } | |
430 | ||
c8312fac WYG |
431 | static void iwl_prepare_legacy_sensitivity_tbl(struct iwl_priv *priv, |
432 | struct iwl_sensitivity_data *data, | |
433 | __le16 *tbl) | |
f0832f13 | 434 | { |
c8312fac | 435 | tbl[HD_AUTO_CORR32_X4_TH_ADD_MIN_INDEX] = |
f0832f13 | 436 | cpu_to_le16((u16)data->auto_corr_ofdm); |
c8312fac | 437 | tbl[HD_AUTO_CORR32_X4_TH_ADD_MIN_MRC_INDEX] = |
f0832f13 | 438 | cpu_to_le16((u16)data->auto_corr_ofdm_mrc); |
c8312fac | 439 | tbl[HD_AUTO_CORR32_X1_TH_ADD_MIN_INDEX] = |
f0832f13 | 440 | cpu_to_le16((u16)data->auto_corr_ofdm_x1); |
c8312fac | 441 | tbl[HD_AUTO_CORR32_X1_TH_ADD_MIN_MRC_INDEX] = |
f0832f13 EG |
442 | cpu_to_le16((u16)data->auto_corr_ofdm_mrc_x1); |
443 | ||
c8312fac | 444 | tbl[HD_AUTO_CORR40_X4_TH_ADD_MIN_INDEX] = |
f0832f13 | 445 | cpu_to_le16((u16)data->auto_corr_cck); |
c8312fac | 446 | tbl[HD_AUTO_CORR40_X4_TH_ADD_MIN_MRC_INDEX] = |
f0832f13 EG |
447 | cpu_to_le16((u16)data->auto_corr_cck_mrc); |
448 | ||
c8312fac | 449 | tbl[HD_MIN_ENERGY_CCK_DET_INDEX] = |
f0832f13 | 450 | cpu_to_le16((u16)data->nrg_th_cck); |
c8312fac | 451 | tbl[HD_MIN_ENERGY_OFDM_DET_INDEX] = |
f0832f13 EG |
452 | cpu_to_le16((u16)data->nrg_th_ofdm); |
453 | ||
c8312fac | 454 | tbl[HD_BARKER_CORR_TH_ADD_MIN_INDEX] = |
55036d66 | 455 | cpu_to_le16(data->barker_corr_th_min); |
c8312fac | 456 | tbl[HD_BARKER_CORR_TH_ADD_MIN_MRC_INDEX] = |
55036d66 | 457 | cpu_to_le16(data->barker_corr_th_min_mrc); |
c8312fac | 458 | tbl[HD_OFDM_ENERGY_TH_IN_INDEX] = |
55036d66 | 459 | cpu_to_le16(data->nrg_th_cca); |
f0832f13 | 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); | |
c8312fac WYG |
469 | } |
470 | ||
471 | /* Prepare a SENSITIVITY_CMD, send to uCode if values have changed */ | |
472 | static int iwl_sensitivity_write(struct iwl_priv *priv) | |
473 | { | |
474 | struct iwl_sensitivity_cmd cmd; | |
475 | struct iwl_sensitivity_data *data = NULL; | |
476 | struct iwl_host_cmd cmd_out = { | |
477 | .id = SENSITIVITY_CMD, | |
3fa50738 | 478 | .len = { sizeof(struct iwl_sensitivity_cmd), }, |
c8312fac | 479 | .flags = CMD_ASYNC, |
3fa50738 | 480 | .data = { &cmd, }, |
c8312fac WYG |
481 | }; |
482 | ||
483 | data = &(priv->sensitivity_data); | |
484 | ||
485 | memset(&cmd, 0, sizeof(cmd)); | |
486 | ||
487 | iwl_prepare_legacy_sensitivity_tbl(priv, data, &cmd.table[0]); | |
f0832f13 EG |
488 | |
489 | /* Update uCode's "work" table, and copy it to DSP */ | |
490 | cmd.control = SENSITIVITY_CMD_CONTROL_WORK_TABLE; | |
491 | ||
492 | /* Don't send command to uCode if nothing has changed */ | |
493 | if (!memcmp(&cmd.table[0], &(priv->sensitivity_tbl[0]), | |
494 | sizeof(u16)*HD_TABLE_SIZE)) { | |
e1623446 | 495 | IWL_DEBUG_CALIB(priv, "No change in SENSITIVITY_CMD\n"); |
f0832f13 EG |
496 | return 0; |
497 | } | |
498 | ||
499 | /* Copy table for comparison next time */ | |
500 | memcpy(&(priv->sensitivity_tbl[0]), &(cmd.table[0]), | |
501 | sizeof(u16)*HD_TABLE_SIZE); | |
502 | ||
e10a0533 | 503 | return iwl_dvm_send_cmd(priv, &cmd_out); |
f0832f13 EG |
504 | } |
505 | ||
c8312fac WYG |
506 | /* Prepare a SENSITIVITY_CMD, send to uCode if values have changed */ |
507 | static int iwl_enhance_sensitivity_write(struct iwl_priv *priv) | |
508 | { | |
509 | struct iwl_enhance_sensitivity_cmd cmd; | |
510 | struct iwl_sensitivity_data *data = NULL; | |
511 | struct iwl_host_cmd cmd_out = { | |
512 | .id = SENSITIVITY_CMD, | |
3fa50738 | 513 | .len = { sizeof(struct iwl_enhance_sensitivity_cmd), }, |
c8312fac | 514 | .flags = CMD_ASYNC, |
3fa50738 | 515 | .data = { &cmd, }, |
c8312fac WYG |
516 | }; |
517 | ||
518 | data = &(priv->sensitivity_data); | |
519 | ||
520 | memset(&cmd, 0, sizeof(cmd)); | |
521 | ||
522 | iwl_prepare_legacy_sensitivity_tbl(priv, data, &cmd.enhance_table[0]); | |
523 | ||
38622419 | 524 | if (cfg(priv)->base_params->hd_v2) { |
ae7f9a74 WYG |
525 | cmd.enhance_table[HD_INA_NON_SQUARE_DET_OFDM_INDEX] = |
526 | HD_INA_NON_SQUARE_DET_OFDM_DATA_V2; | |
527 | cmd.enhance_table[HD_INA_NON_SQUARE_DET_CCK_INDEX] = | |
528 | HD_INA_NON_SQUARE_DET_CCK_DATA_V2; | |
529 | cmd.enhance_table[HD_CORR_11_INSTEAD_OF_CORR_9_EN_INDEX] = | |
530 | HD_CORR_11_INSTEAD_OF_CORR_9_EN_DATA_V2; | |
531 | cmd.enhance_table[HD_OFDM_NON_SQUARE_DET_SLOPE_MRC_INDEX] = | |
532 | HD_OFDM_NON_SQUARE_DET_SLOPE_MRC_DATA_V2; | |
533 | cmd.enhance_table[HD_OFDM_NON_SQUARE_DET_INTERCEPT_MRC_INDEX] = | |
534 | HD_OFDM_NON_SQUARE_DET_INTERCEPT_MRC_DATA_V2; | |
535 | cmd.enhance_table[HD_OFDM_NON_SQUARE_DET_SLOPE_INDEX] = | |
536 | HD_OFDM_NON_SQUARE_DET_SLOPE_DATA_V2; | |
537 | cmd.enhance_table[HD_OFDM_NON_SQUARE_DET_INTERCEPT_INDEX] = | |
538 | HD_OFDM_NON_SQUARE_DET_INTERCEPT_DATA_V2; | |
539 | cmd.enhance_table[HD_CCK_NON_SQUARE_DET_SLOPE_MRC_INDEX] = | |
540 | HD_CCK_NON_SQUARE_DET_SLOPE_MRC_DATA_V2; | |
541 | cmd.enhance_table[HD_CCK_NON_SQUARE_DET_INTERCEPT_MRC_INDEX] = | |
542 | HD_CCK_NON_SQUARE_DET_INTERCEPT_MRC_DATA_V2; | |
543 | cmd.enhance_table[HD_CCK_NON_SQUARE_DET_SLOPE_INDEX] = | |
544 | HD_CCK_NON_SQUARE_DET_SLOPE_DATA_V2; | |
545 | cmd.enhance_table[HD_CCK_NON_SQUARE_DET_INTERCEPT_INDEX] = | |
546 | HD_CCK_NON_SQUARE_DET_INTERCEPT_DATA_V2; | |
547 | } else { | |
548 | cmd.enhance_table[HD_INA_NON_SQUARE_DET_OFDM_INDEX] = | |
549 | HD_INA_NON_SQUARE_DET_OFDM_DATA_V1; | |
550 | cmd.enhance_table[HD_INA_NON_SQUARE_DET_CCK_INDEX] = | |
551 | HD_INA_NON_SQUARE_DET_CCK_DATA_V1; | |
552 | cmd.enhance_table[HD_CORR_11_INSTEAD_OF_CORR_9_EN_INDEX] = | |
553 | HD_CORR_11_INSTEAD_OF_CORR_9_EN_DATA_V1; | |
554 | cmd.enhance_table[HD_OFDM_NON_SQUARE_DET_SLOPE_MRC_INDEX] = | |
555 | HD_OFDM_NON_SQUARE_DET_SLOPE_MRC_DATA_V1; | |
556 | cmd.enhance_table[HD_OFDM_NON_SQUARE_DET_INTERCEPT_MRC_INDEX] = | |
557 | HD_OFDM_NON_SQUARE_DET_INTERCEPT_MRC_DATA_V1; | |
558 | cmd.enhance_table[HD_OFDM_NON_SQUARE_DET_SLOPE_INDEX] = | |
559 | HD_OFDM_NON_SQUARE_DET_SLOPE_DATA_V1; | |
560 | cmd.enhance_table[HD_OFDM_NON_SQUARE_DET_INTERCEPT_INDEX] = | |
561 | HD_OFDM_NON_SQUARE_DET_INTERCEPT_DATA_V1; | |
562 | cmd.enhance_table[HD_CCK_NON_SQUARE_DET_SLOPE_MRC_INDEX] = | |
563 | HD_CCK_NON_SQUARE_DET_SLOPE_MRC_DATA_V1; | |
564 | cmd.enhance_table[HD_CCK_NON_SQUARE_DET_INTERCEPT_MRC_INDEX] = | |
565 | HD_CCK_NON_SQUARE_DET_INTERCEPT_MRC_DATA_V1; | |
566 | cmd.enhance_table[HD_CCK_NON_SQUARE_DET_SLOPE_INDEX] = | |
567 | HD_CCK_NON_SQUARE_DET_SLOPE_DATA_V1; | |
568 | cmd.enhance_table[HD_CCK_NON_SQUARE_DET_INTERCEPT_INDEX] = | |
569 | HD_CCK_NON_SQUARE_DET_INTERCEPT_DATA_V1; | |
570 | } | |
c8312fac WYG |
571 | |
572 | /* Update uCode's "work" table, and copy it to DSP */ | |
573 | cmd.control = SENSITIVITY_CMD_CONTROL_WORK_TABLE; | |
574 | ||
575 | /* Don't send command to uCode if nothing has changed */ | |
576 | if (!memcmp(&cmd.enhance_table[0], &(priv->sensitivity_tbl[0]), | |
577 | sizeof(u16)*HD_TABLE_SIZE) && | |
578 | !memcmp(&cmd.enhance_table[HD_INA_NON_SQUARE_DET_OFDM_INDEX], | |
579 | &(priv->enhance_sensitivity_tbl[0]), | |
580 | sizeof(u16)*ENHANCE_HD_TABLE_ENTRIES)) { | |
581 | IWL_DEBUG_CALIB(priv, "No change in SENSITIVITY_CMD\n"); | |
582 | return 0; | |
583 | } | |
584 | ||
585 | /* Copy table for comparison next time */ | |
586 | memcpy(&(priv->sensitivity_tbl[0]), &(cmd.enhance_table[0]), | |
587 | sizeof(u16)*HD_TABLE_SIZE); | |
588 | memcpy(&(priv->enhance_sensitivity_tbl[0]), | |
589 | &(cmd.enhance_table[HD_INA_NON_SQUARE_DET_OFDM_INDEX]), | |
590 | sizeof(u16)*ENHANCE_HD_TABLE_ENTRIES); | |
591 | ||
e10a0533 | 592 | return iwl_dvm_send_cmd(priv, &cmd_out); |
c8312fac WYG |
593 | } |
594 | ||
f0832f13 EG |
595 | void iwl_init_sensitivity(struct iwl_priv *priv) |
596 | { | |
597 | int ret = 0; | |
598 | int i; | |
599 | struct iwl_sensitivity_data *data = NULL; | |
9e295116 | 600 | const struct iwl_sensitivity_ranges *ranges = priv->hw_params.sens; |
f0832f13 | 601 | |
445c2dff TW |
602 | if (priv->disable_sens_cal) |
603 | return; | |
604 | ||
e1623446 | 605 | IWL_DEBUG_CALIB(priv, "Start iwl_init_sensitivity\n"); |
f0832f13 EG |
606 | |
607 | /* Clear driver's sensitivity algo data */ | |
608 | data = &(priv->sensitivity_data); | |
609 | ||
610 | if (ranges == NULL) | |
f0832f13 EG |
611 | return; |
612 | ||
613 | memset(data, 0, sizeof(struct iwl_sensitivity_data)); | |
614 | ||
615 | data->num_in_cck_no_fa = 0; | |
616 | data->nrg_curr_state = IWL_FA_TOO_MANY; | |
617 | data->nrg_prev_state = IWL_FA_TOO_MANY; | |
618 | data->nrg_silence_ref = 0; | |
619 | data->nrg_silence_idx = 0; | |
620 | data->nrg_energy_idx = 0; | |
621 | ||
622 | for (i = 0; i < 10; i++) | |
623 | data->nrg_value[i] = 0; | |
624 | ||
625 | for (i = 0; i < NRG_NUM_PREV_STAT_L; i++) | |
626 | data->nrg_silence_rssi[i] = 0; | |
627 | ||
f3a2a424 | 628 | data->auto_corr_ofdm = ranges->auto_corr_min_ofdm; |
f0832f13 EG |
629 | data->auto_corr_ofdm_mrc = ranges->auto_corr_min_ofdm_mrc; |
630 | data->auto_corr_ofdm_x1 = ranges->auto_corr_min_ofdm_x1; | |
631 | data->auto_corr_ofdm_mrc_x1 = ranges->auto_corr_min_ofdm_mrc_x1; | |
632 | data->auto_corr_cck = AUTO_CORR_CCK_MIN_VAL_DEF; | |
633 | data->auto_corr_cck_mrc = ranges->auto_corr_min_cck_mrc; | |
634 | data->nrg_th_cck = ranges->nrg_th_cck; | |
635 | data->nrg_th_ofdm = ranges->nrg_th_ofdm; | |
55036d66 WYG |
636 | data->barker_corr_th_min = ranges->barker_corr_th_min; |
637 | data->barker_corr_th_min_mrc = ranges->barker_corr_th_min_mrc; | |
638 | data->nrg_th_cca = ranges->nrg_th_cca; | |
f0832f13 EG |
639 | |
640 | data->last_bad_plcp_cnt_ofdm = 0; | |
641 | data->last_fa_cnt_ofdm = 0; | |
642 | data->last_bad_plcp_cnt_cck = 0; | |
643 | data->last_fa_cnt_cck = 0; | |
644 | ||
0692fe41 | 645 | if (priv->fw->enhance_sensitivity_table) |
c8312fac WYG |
646 | ret |= iwl_enhance_sensitivity_write(priv); |
647 | else | |
648 | ret |= iwl_sensitivity_write(priv); | |
e1623446 | 649 | IWL_DEBUG_CALIB(priv, "<<return 0x%X\n", ret); |
f0832f13 | 650 | } |
f0832f13 | 651 | |
0da0e5bf | 652 | void iwl_sensitivity_calibration(struct iwl_priv *priv) |
f0832f13 EG |
653 | { |
654 | u32 rx_enable_time; | |
655 | u32 fa_cck; | |
656 | u32 fa_ofdm; | |
657 | u32 bad_plcp_cck; | |
658 | u32 bad_plcp_ofdm; | |
659 | u32 norm_fa_ofdm; | |
660 | u32 norm_fa_cck; | |
661 | struct iwl_sensitivity_data *data = NULL; | |
7980fba5 WYG |
662 | struct statistics_rx_non_phy *rx_info; |
663 | struct statistics_rx_phy *ofdm, *cck; | |
f0832f13 EG |
664 | struct statistics_general_data statis; |
665 | ||
445c2dff TW |
666 | if (priv->disable_sens_cal) |
667 | return; | |
668 | ||
f0832f13 EG |
669 | data = &(priv->sensitivity_data); |
670 | ||
246ed355 | 671 | if (!iwl_is_any_associated(priv)) { |
e1623446 | 672 | IWL_DEBUG_CALIB(priv, "<< - not associated\n"); |
f0832f13 EG |
673 | return; |
674 | } | |
675 | ||
4ff70fcd | 676 | spin_lock_bh(&priv->statistics.lock); |
0da0e5bf JB |
677 | rx_info = &priv->statistics.rx_non_phy; |
678 | ofdm = &priv->statistics.rx_ofdm; | |
679 | cck = &priv->statistics.rx_cck; | |
f0832f13 | 680 | if (rx_info->interference_data_flag != INTERFERENCE_DATA_AVAILABLE) { |
e1623446 | 681 | IWL_DEBUG_CALIB(priv, "<< invalid data.\n"); |
4ff70fcd | 682 | spin_unlock_bh(&priv->statistics.lock); |
f0832f13 EG |
683 | return; |
684 | } | |
685 | ||
686 | /* Extract Statistics: */ | |
687 | rx_enable_time = le32_to_cpu(rx_info->channel_load); | |
7980fba5 WYG |
688 | fa_cck = le32_to_cpu(cck->false_alarm_cnt); |
689 | fa_ofdm = le32_to_cpu(ofdm->false_alarm_cnt); | |
690 | bad_plcp_cck = le32_to_cpu(cck->plcp_err); | |
691 | bad_plcp_ofdm = le32_to_cpu(ofdm->plcp_err); | |
f0832f13 EG |
692 | |
693 | statis.beacon_silence_rssi_a = | |
7980fba5 | 694 | le32_to_cpu(rx_info->beacon_silence_rssi_a); |
f0832f13 | 695 | statis.beacon_silence_rssi_b = |
7980fba5 | 696 | le32_to_cpu(rx_info->beacon_silence_rssi_b); |
f0832f13 | 697 | statis.beacon_silence_rssi_c = |
7980fba5 | 698 | le32_to_cpu(rx_info->beacon_silence_rssi_c); |
f0832f13 | 699 | statis.beacon_energy_a = |
7980fba5 | 700 | le32_to_cpu(rx_info->beacon_energy_a); |
f0832f13 | 701 | statis.beacon_energy_b = |
7980fba5 | 702 | le32_to_cpu(rx_info->beacon_energy_b); |
f0832f13 | 703 | statis.beacon_energy_c = |
7980fba5 | 704 | le32_to_cpu(rx_info->beacon_energy_c); |
f0832f13 | 705 | |
4ff70fcd | 706 | spin_unlock_bh(&priv->statistics.lock); |
f0832f13 | 707 | |
e1623446 | 708 | IWL_DEBUG_CALIB(priv, "rx_enable_time = %u usecs\n", rx_enable_time); |
f0832f13 EG |
709 | |
710 | if (!rx_enable_time) { | |
91dd6c27 | 711 | IWL_DEBUG_CALIB(priv, "<< RX Enable Time == 0!\n"); |
f0832f13 EG |
712 | return; |
713 | } | |
714 | ||
715 | /* These statistics increase monotonically, and do not reset | |
716 | * at each beacon. Calculate difference from last value, or just | |
717 | * use the new statistics value if it has reset or wrapped around. */ | |
718 | if (data->last_bad_plcp_cnt_cck > bad_plcp_cck) | |
719 | data->last_bad_plcp_cnt_cck = bad_plcp_cck; | |
720 | else { | |
721 | bad_plcp_cck -= data->last_bad_plcp_cnt_cck; | |
722 | data->last_bad_plcp_cnt_cck += bad_plcp_cck; | |
723 | } | |
724 | ||
725 | if (data->last_bad_plcp_cnt_ofdm > bad_plcp_ofdm) | |
726 | data->last_bad_plcp_cnt_ofdm = bad_plcp_ofdm; | |
727 | else { | |
728 | bad_plcp_ofdm -= data->last_bad_plcp_cnt_ofdm; | |
729 | data->last_bad_plcp_cnt_ofdm += bad_plcp_ofdm; | |
730 | } | |
731 | ||
732 | if (data->last_fa_cnt_ofdm > fa_ofdm) | |
733 | data->last_fa_cnt_ofdm = fa_ofdm; | |
734 | else { | |
735 | fa_ofdm -= data->last_fa_cnt_ofdm; | |
736 | data->last_fa_cnt_ofdm += fa_ofdm; | |
737 | } | |
738 | ||
739 | if (data->last_fa_cnt_cck > fa_cck) | |
740 | data->last_fa_cnt_cck = fa_cck; | |
741 | else { | |
742 | fa_cck -= data->last_fa_cnt_cck; | |
743 | data->last_fa_cnt_cck += fa_cck; | |
744 | } | |
745 | ||
746 | /* Total aborted signal locks */ | |
747 | norm_fa_ofdm = fa_ofdm + bad_plcp_ofdm; | |
748 | norm_fa_cck = fa_cck + bad_plcp_cck; | |
749 | ||
e1623446 | 750 | IWL_DEBUG_CALIB(priv, "cck: fa %u badp %u ofdm: fa %u badp %u\n", fa_cck, |
f0832f13 EG |
751 | bad_plcp_cck, fa_ofdm, bad_plcp_ofdm); |
752 | ||
753 | iwl_sens_auto_corr_ofdm(priv, norm_fa_ofdm, rx_enable_time); | |
754 | iwl_sens_energy_cck(priv, norm_fa_cck, rx_enable_time, &statis); | |
0692fe41 | 755 | if (priv->fw->enhance_sensitivity_table) |
c8312fac WYG |
756 | iwl_enhance_sensitivity_write(priv); |
757 | else | |
758 | iwl_sensitivity_write(priv); | |
f0832f13 | 759 | } |
f0832f13 | 760 | |
d8c07e7a WYG |
761 | static inline u8 find_first_chain(u8 mask) |
762 | { | |
763 | if (mask & ANT_A) | |
764 | return CHAIN_A; | |
765 | if (mask & ANT_B) | |
766 | return CHAIN_B; | |
767 | return CHAIN_C; | |
768 | } | |
769 | ||
3031242b SZ |
770 | /** |
771 | * Run disconnected antenna algorithm to find out which antennas are | |
772 | * disconnected. | |
773 | */ | |
774 | static void iwl_find_disconn_antenna(struct iwl_priv *priv, u32* average_sig, | |
775 | struct iwl_chain_noise_data *data) | |
776 | { | |
777 | u32 active_chains = 0; | |
778 | u32 max_average_sig; | |
779 | u16 max_average_sig_antenna_i; | |
780 | u8 num_tx_chains; | |
781 | u8 first_chain; | |
782 | u16 i = 0; | |
783 | ||
b8c2b05e FD |
784 | average_sig[0] = data->chain_signal_a / IWL_CAL_NUM_BEACONS; |
785 | average_sig[1] = data->chain_signal_b / IWL_CAL_NUM_BEACONS; | |
786 | average_sig[2] = data->chain_signal_c / IWL_CAL_NUM_BEACONS; | |
3031242b SZ |
787 | |
788 | if (average_sig[0] >= average_sig[1]) { | |
789 | max_average_sig = average_sig[0]; | |
790 | max_average_sig_antenna_i = 0; | |
791 | active_chains = (1 << max_average_sig_antenna_i); | |
792 | } else { | |
793 | max_average_sig = average_sig[1]; | |
794 | max_average_sig_antenna_i = 1; | |
795 | active_chains = (1 << max_average_sig_antenna_i); | |
796 | } | |
797 | ||
798 | if (average_sig[2] >= max_average_sig) { | |
799 | max_average_sig = average_sig[2]; | |
800 | max_average_sig_antenna_i = 2; | |
801 | active_chains = (1 << max_average_sig_antenna_i); | |
802 | } | |
803 | ||
804 | IWL_DEBUG_CALIB(priv, "average_sig: a %d b %d c %d\n", | |
805 | average_sig[0], average_sig[1], average_sig[2]); | |
806 | IWL_DEBUG_CALIB(priv, "max_average_sig = %d, antenna %d\n", | |
807 | max_average_sig, max_average_sig_antenna_i); | |
808 | ||
809 | /* Compare signal strengths for all 3 receivers. */ | |
810 | for (i = 0; i < NUM_RX_CHAINS; i++) { | |
811 | if (i != max_average_sig_antenna_i) { | |
812 | s32 rssi_delta = (max_average_sig - average_sig[i]); | |
813 | ||
814 | /* If signal is very weak, compared with | |
815 | * strongest, mark it as disconnected. */ | |
816 | if (rssi_delta > MAXIMUM_ALLOWED_PATHLOSS) | |
817 | data->disconn_array[i] = 1; | |
818 | else | |
819 | active_chains |= (1 << i); | |
820 | IWL_DEBUG_CALIB(priv, "i = %d rssiDelta = %d " | |
821 | "disconn_array[i] = %d\n", | |
822 | i, rssi_delta, data->disconn_array[i]); | |
823 | } | |
824 | } | |
825 | ||
826 | /* | |
827 | * The above algorithm sometimes fails when the ucode | |
828 | * reports 0 for all chains. It's not clear why that | |
829 | * happens to start with, but it is then causing trouble | |
830 | * because this can make us enable more chains than the | |
831 | * hardware really has. | |
832 | * | |
833 | * To be safe, simply mask out any chains that we know | |
834 | * are not on the device. | |
835 | */ | |
9e295116 | 836 | active_chains &= priv->hw_params.valid_rx_ant; |
3031242b SZ |
837 | |
838 | num_tx_chains = 0; | |
839 | for (i = 0; i < NUM_RX_CHAINS; i++) { | |
840 | /* loops on all the bits of | |
841 | * priv->hw_setting.valid_tx_ant */ | |
842 | u8 ant_msk = (1 << i); | |
9e295116 | 843 | if (!(priv->hw_params.valid_tx_ant & ant_msk)) |
3031242b SZ |
844 | continue; |
845 | ||
846 | num_tx_chains++; | |
847 | if (data->disconn_array[i] == 0) | |
848 | /* there is a Tx antenna connected */ | |
849 | break; | |
9e295116 | 850 | if (num_tx_chains == priv->hw_params.tx_chains_num && |
3031242b SZ |
851 | data->disconn_array[i]) { |
852 | /* | |
853 | * If all chains are disconnected | |
854 | * connect the first valid tx chain | |
855 | */ | |
856 | first_chain = | |
9e295116 | 857 | find_first_chain(priv->hw_params.valid_tx_ant); |
3031242b SZ |
858 | data->disconn_array[first_chain] = 0; |
859 | active_chains |= BIT(first_chain); | |
85ee7a1d JP |
860 | IWL_DEBUG_CALIB(priv, |
861 | "All Tx chains are disconnected W/A - declare %d as connected\n", | |
3031242b SZ |
862 | first_chain); |
863 | break; | |
864 | } | |
865 | } | |
866 | ||
9e295116 | 867 | if (active_chains != priv->hw_params.valid_rx_ant && |
3031242b SZ |
868 | active_chains != priv->chain_noise_data.active_chains) |
869 | IWL_DEBUG_CALIB(priv, | |
870 | "Detected that not all antennas are connected! " | |
871 | "Connected: %#x, valid: %#x.\n", | |
d6189124 | 872 | active_chains, |
9e295116 | 873 | priv->hw_params.valid_rx_ant); |
3031242b SZ |
874 | |
875 | /* Save for use within RXON, TX, SCAN commands, etc. */ | |
876 | data->active_chains = active_chains; | |
877 | IWL_DEBUG_CALIB(priv, "active_chains (bitwise) = 0x%x\n", | |
878 | active_chains); | |
879 | } | |
880 | ||
e505c433 | 881 | static void iwlagn_gain_computation(struct iwl_priv *priv, |
fdeff465 JB |
882 | u32 average_noise[NUM_RX_CHAINS], |
883 | u8 default_chain) | |
e505c433 WYG |
884 | { |
885 | int i; | |
886 | s32 delta_g; | |
887 | struct iwl_chain_noise_data *data = &priv->chain_noise_data; | |
888 | ||
889 | /* | |
890 | * Find Gain Code for the chains based on "default chain" | |
891 | */ | |
892 | for (i = default_chain + 1; i < NUM_RX_CHAINS; i++) { | |
893 | if ((data->disconn_array[i])) { | |
894 | data->delta_gain_code[i] = 0; | |
895 | continue; | |
896 | } | |
897 | ||
38622419 | 898 | delta_g = (cfg(priv)->base_params->chain_noise_scale * |
e505c433 WYG |
899 | ((s32)average_noise[default_chain] - |
900 | (s32)average_noise[i])) / 1500; | |
901 | ||
902 | /* bound gain by 2 bits value max, 3rd bit is sign */ | |
903 | data->delta_gain_code[i] = | |
904 | min(abs(delta_g), | |
905 | (long) CHAIN_NOISE_MAX_DELTA_GAIN_CODE); | |
906 | ||
907 | if (delta_g < 0) | |
908 | /* | |
909 | * set negative sign ... | |
910 | * note to Intel developers: This is uCode API format, | |
911 | * not the format of any internal device registers. | |
912 | * Do not change this format for e.g. 6050 or similar | |
913 | * devices. Change format only if more resolution | |
914 | * (i.e. more than 2 bits magnitude) is needed. | |
915 | */ | |
916 | data->delta_gain_code[i] |= (1 << 2); | |
917 | } | |
918 | ||
919 | IWL_DEBUG_CALIB(priv, "Delta gains: ANT_B = %d ANT_C = %d\n", | |
920 | data->delta_gain_code[1], data->delta_gain_code[2]); | |
921 | ||
922 | if (!data->radio_write) { | |
923 | struct iwl_calib_chain_noise_gain_cmd cmd; | |
924 | ||
925 | memset(&cmd, 0, sizeof(cmd)); | |
926 | ||
927 | iwl_set_calib_hdr(&cmd.hdr, | |
898ed67b | 928 | priv->phy_calib_chain_noise_gain_cmd); |
e505c433 WYG |
929 | cmd.delta_gain_1 = data->delta_gain_code[1]; |
930 | cmd.delta_gain_2 = data->delta_gain_code[2]; | |
e10a0533 | 931 | iwl_dvm_send_cmd_pdu(priv, REPLY_PHY_CALIBRATION_CMD, |
e505c433 WYG |
932 | CMD_ASYNC, sizeof(cmd), &cmd); |
933 | ||
934 | data->radio_write = 1; | |
935 | data->state = IWL_CHAIN_NOISE_CALIBRATED; | |
936 | } | |
937 | } | |
3031242b | 938 | |
f0832f13 | 939 | /* |
3031242b | 940 | * Accumulate 16 beacons of signal and noise statistics for each of |
f0832f13 EG |
941 | * 3 receivers/antennas/rx-chains, then figure out: |
942 | * 1) Which antennas are connected. | |
943 | * 2) Differential rx gain settings to balance the 3 receivers. | |
944 | */ | |
0da0e5bf | 945 | void iwl_chain_noise_calibration(struct iwl_priv *priv) |
f0832f13 EG |
946 | { |
947 | struct iwl_chain_noise_data *data = NULL; | |
948 | ||
949 | u32 chain_noise_a; | |
950 | u32 chain_noise_b; | |
951 | u32 chain_noise_c; | |
952 | u32 chain_sig_a; | |
953 | u32 chain_sig_b; | |
954 | u32 chain_sig_c; | |
955 | u32 average_sig[NUM_RX_CHAINS] = {INITIALIZATION_VALUE}; | |
956 | u32 average_noise[NUM_RX_CHAINS] = {INITIALIZATION_VALUE}; | |
f0832f13 EG |
957 | u32 min_average_noise = MIN_AVERAGE_NOISE_MAX_VALUE; |
958 | u16 min_average_noise_antenna_i = INITIALIZATION_VALUE; | |
959 | u16 i = 0; | |
960 | u16 rxon_chnum = INITIALIZATION_VALUE; | |
961 | u16 stat_chnum = INITIALIZATION_VALUE; | |
962 | u8 rxon_band24; | |
963 | u8 stat_band24; | |
7980fba5 | 964 | struct statistics_rx_non_phy *rx_info; |
3031242b | 965 | |
246ed355 JB |
966 | /* |
967 | * MULTI-FIXME: | |
968 | * When we support multiple interfaces on different channels, | |
969 | * this must be modified/fixed. | |
970 | */ | |
971 | struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS]; | |
f0832f13 | 972 | |
445c2dff TW |
973 | if (priv->disable_chain_noise_cal) |
974 | return; | |
975 | ||
f0832f13 EG |
976 | data = &(priv->chain_noise_data); |
977 | ||
d8c07e7a WYG |
978 | /* |
979 | * Accumulate just the first "chain_noise_num_beacons" after | |
980 | * the first association, then we're done forever. | |
981 | */ | |
f0832f13 EG |
982 | if (data->state != IWL_CHAIN_NOISE_ACCUMULATE) { |
983 | if (data->state == IWL_CHAIN_NOISE_ALIVE) | |
e1623446 | 984 | IWL_DEBUG_CALIB(priv, "Wait for noise calib reset\n"); |
f0832f13 EG |
985 | return; |
986 | } | |
987 | ||
4ff70fcd | 988 | spin_lock_bh(&priv->statistics.lock); |
0da0e5bf JB |
989 | |
990 | rx_info = &priv->statistics.rx_non_phy; | |
991 | ||
f0832f13 | 992 | if (rx_info->interference_data_flag != INTERFERENCE_DATA_AVAILABLE) { |
e1623446 | 993 | IWL_DEBUG_CALIB(priv, " << Interference data unavailable\n"); |
4ff70fcd | 994 | spin_unlock_bh(&priv->statistics.lock); |
f0832f13 EG |
995 | return; |
996 | } | |
997 | ||
246ed355 JB |
998 | rxon_band24 = !!(ctx->staging.flags & RXON_FLG_BAND_24G_MSK); |
999 | rxon_chnum = le16_to_cpu(ctx->staging.channel); | |
0da0e5bf JB |
1000 | stat_band24 = |
1001 | !!(priv->statistics.flag & STATISTICS_REPLY_FLG_BAND_24G_MSK); | |
1002 | stat_chnum = le32_to_cpu(priv->statistics.flag) >> 16; | |
f0832f13 EG |
1003 | |
1004 | /* Make sure we accumulate data for just the associated channel | |
1005 | * (even if scanning). */ | |
1006 | if ((rxon_chnum != stat_chnum) || (rxon_band24 != stat_band24)) { | |
e1623446 | 1007 | IWL_DEBUG_CALIB(priv, "Stats not from chan=%d, band24=%d\n", |
f0832f13 | 1008 | rxon_chnum, rxon_band24); |
4ff70fcd | 1009 | spin_unlock_bh(&priv->statistics.lock); |
f0832f13 EG |
1010 | return; |
1011 | } | |
1012 | ||
d8c07e7a WYG |
1013 | /* |
1014 | * Accumulate beacon statistics values across | |
1015 | * "chain_noise_num_beacons" | |
1016 | */ | |
f0832f13 EG |
1017 | chain_noise_a = le32_to_cpu(rx_info->beacon_silence_rssi_a) & |
1018 | IN_BAND_FILTER; | |
1019 | chain_noise_b = le32_to_cpu(rx_info->beacon_silence_rssi_b) & | |
1020 | IN_BAND_FILTER; | |
1021 | chain_noise_c = le32_to_cpu(rx_info->beacon_silence_rssi_c) & | |
1022 | IN_BAND_FILTER; | |
1023 | ||
1024 | chain_sig_a = le32_to_cpu(rx_info->beacon_rssi_a) & IN_BAND_FILTER; | |
1025 | chain_sig_b = le32_to_cpu(rx_info->beacon_rssi_b) & IN_BAND_FILTER; | |
1026 | chain_sig_c = le32_to_cpu(rx_info->beacon_rssi_c) & IN_BAND_FILTER; | |
1027 | ||
4ff70fcd | 1028 | spin_unlock_bh(&priv->statistics.lock); |
f0832f13 EG |
1029 | |
1030 | data->beacon_count++; | |
1031 | ||
1032 | data->chain_noise_a = (chain_noise_a + data->chain_noise_a); | |
1033 | data->chain_noise_b = (chain_noise_b + data->chain_noise_b); | |
1034 | data->chain_noise_c = (chain_noise_c + data->chain_noise_c); | |
1035 | ||
1036 | data->chain_signal_a = (chain_sig_a + data->chain_signal_a); | |
1037 | data->chain_signal_b = (chain_sig_b + data->chain_signal_b); | |
1038 | data->chain_signal_c = (chain_sig_c + data->chain_signal_c); | |
1039 | ||
e1623446 | 1040 | IWL_DEBUG_CALIB(priv, "chan=%d, band24=%d, beacon=%d\n", |
f0832f13 | 1041 | rxon_chnum, rxon_band24, data->beacon_count); |
e1623446 | 1042 | IWL_DEBUG_CALIB(priv, "chain_sig: a %d b %d c %d\n", |
f0832f13 | 1043 | chain_sig_a, chain_sig_b, chain_sig_c); |
e1623446 | 1044 | IWL_DEBUG_CALIB(priv, "chain_noise: a %d b %d c %d\n", |
f0832f13 EG |
1045 | chain_noise_a, chain_noise_b, chain_noise_c); |
1046 | ||
d8c07e7a | 1047 | /* If this is the "chain_noise_num_beacons", determine: |
f0832f13 EG |
1048 | * 1) Disconnected antennas (using signal strengths) |
1049 | * 2) Differential gain (using silence noise) to balance receivers */ | |
b8c2b05e | 1050 | if (data->beacon_count != IWL_CAL_NUM_BEACONS) |
f0832f13 EG |
1051 | return; |
1052 | ||
1053 | /* Analyze signal for disconnected antenna */ | |
38622419 DF |
1054 | if (cfg(priv)->bt_params && |
1055 | cfg(priv)->bt_params->advanced_bt_coexist) { | |
6fe8efb2 SZ |
1056 | /* Disable disconnected antenna algorithm for advanced |
1057 | bt coex, assuming valid antennas are connected */ | |
9e295116 | 1058 | data->active_chains = priv->hw_params.valid_rx_ant; |
6fe8efb2 SZ |
1059 | for (i = 0; i < NUM_RX_CHAINS; i++) |
1060 | if (!(data->active_chains & (1<<i))) | |
1061 | data->disconn_array[i] = 1; | |
1062 | } else | |
1063 | iwl_find_disconn_antenna(priv, average_sig, data); | |
f0832f13 | 1064 | |
f0832f13 | 1065 | /* Analyze noise for rx balance */ |
b8c2b05e FD |
1066 | average_noise[0] = data->chain_noise_a / IWL_CAL_NUM_BEACONS; |
1067 | average_noise[1] = data->chain_noise_b / IWL_CAL_NUM_BEACONS; | |
1068 | average_noise[2] = data->chain_noise_c / IWL_CAL_NUM_BEACONS; | |
f0832f13 EG |
1069 | |
1070 | for (i = 0; i < NUM_RX_CHAINS; i++) { | |
1071 | if (!(data->disconn_array[i]) && | |
1072 | (average_noise[i] <= min_average_noise)) { | |
1073 | /* This means that chain i is active and has | |
1074 | * lower noise values so far: */ | |
1075 | min_average_noise = average_noise[i]; | |
1076 | min_average_noise_antenna_i = i; | |
1077 | } | |
1078 | } | |
1079 | ||
e1623446 | 1080 | IWL_DEBUG_CALIB(priv, "average_noise: a %d b %d c %d\n", |
f0832f13 EG |
1081 | average_noise[0], average_noise[1], |
1082 | average_noise[2]); | |
1083 | ||
e1623446 | 1084 | IWL_DEBUG_CALIB(priv, "min_average_noise = %d, antenna %d\n", |
f0832f13 EG |
1085 | min_average_noise, min_average_noise_antenna_i); |
1086 | ||
5c3d29fc | 1087 | iwlagn_gain_computation(priv, average_noise, |
9e295116 | 1088 | find_first_chain(priv->hw_params.valid_rx_ant)); |
04816448 GE |
1089 | |
1090 | /* Some power changes may have been made during the calibration. | |
1091 | * Update and commit the RXON | |
1092 | */ | |
6b6db91c | 1093 | iwl_update_chain_flags(priv); |
04816448 GE |
1094 | |
1095 | data->state = IWL_CHAIN_NOISE_DONE; | |
e312c24c | 1096 | iwl_power_update_mode(priv, false); |
f0832f13 | 1097 | } |
4a4a9e81 TW |
1098 | |
1099 | void iwl_reset_run_time_calib(struct iwl_priv *priv) | |
1100 | { | |
1101 | int i; | |
1102 | memset(&(priv->sensitivity_data), 0, | |
1103 | sizeof(struct iwl_sensitivity_data)); | |
1104 | memset(&(priv->chain_noise_data), 0, | |
1105 | sizeof(struct iwl_chain_noise_data)); | |
1106 | for (i = 0; i < NUM_RX_CHAINS; i++) | |
1107 | priv->chain_noise_data.delta_gain_code[i] = | |
1108 | CHAIN_NOISE_DELTA_GAIN_INIT_VAL; | |
1109 | ||
1110 | /* Ask for statistics now, the uCode will send notification | |
1111 | * periodically after association */ | |
ef8d5529 | 1112 | iwl_send_statistics_request(priv, CMD_ASYNC, true); |
4a4a9e81 | 1113 | } |