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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 | * | |
901069c7 | 8 | * Copyright(c) 2008 - 2011 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 | * | |
901069c7 | 33 | * Copyright(c) 2005 - 2011 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 | ||
34c22cf9 WT |
76 | struct statistics_general_data { |
77 | u32 beacon_silence_rssi_a; | |
78 | u32 beacon_silence_rssi_b; | |
79 | u32 beacon_silence_rssi_c; | |
80 | u32 beacon_energy_a; | |
81 | u32 beacon_energy_b; | |
82 | u32 beacon_energy_c; | |
83 | }; | |
84 | ||
be5d56ed | 85 | int iwl_send_calib_results(struct iwl_priv *priv) |
6e21f2c1 TW |
86 | { |
87 | int ret = 0; | |
88 | int i = 0; | |
89 | ||
90 | struct iwl_host_cmd hcmd = { | |
91 | .id = REPLY_PHY_CALIBRATION_CMD, | |
e419d62d | 92 | .flags = CMD_SYNC, |
6e21f2c1 TW |
93 | }; |
94 | ||
be5d56ed TW |
95 | for (i = 0; i < IWL_CALIB_MAX; i++) { |
96 | if ((BIT(i) & priv->hw_params.calib_init_cfg) && | |
97 | priv->calib_results[i].buf) { | |
3fa50738 JB |
98 | hcmd.len[0] = priv->calib_results[i].buf_len; |
99 | hcmd.data[0] = priv->calib_results[i].buf; | |
4ce7cc2b | 100 | hcmd.dataflags[0] = IWL_HCMD_DFL_NOCOPY; |
41c50542 | 101 | ret = trans_send_cmd(&priv->trans, &hcmd); |
936e8a73 WYG |
102 | if (ret) { |
103 | IWL_ERR(priv, "Error %d iteration %d\n", | |
104 | ret, i); | |
105 | break; | |
106 | } | |
6e21f2c1 | 107 | } |
be5d56ed | 108 | } |
6e21f2c1 | 109 | |
6e21f2c1 TW |
110 | return ret; |
111 | } | |
6e21f2c1 TW |
112 | |
113 | int iwl_calib_set(struct iwl_calib_result *res, const u8 *buf, int len) | |
114 | { | |
115 | if (res->buf_len != len) { | |
116 | kfree(res->buf); | |
117 | res->buf = kzalloc(len, GFP_ATOMIC); | |
118 | } | |
119 | if (unlikely(res->buf == NULL)) | |
120 | return -ENOMEM; | |
121 | ||
122 | res->buf_len = len; | |
123 | memcpy(res->buf, buf, len); | |
124 | return 0; | |
125 | } | |
6e21f2c1 TW |
126 | |
127 | void iwl_calib_free_results(struct iwl_priv *priv) | |
128 | { | |
129 | int i; | |
130 | ||
131 | for (i = 0; i < IWL_CALIB_MAX; i++) { | |
132 | kfree(priv->calib_results[i].buf); | |
133 | priv->calib_results[i].buf = NULL; | |
134 | priv->calib_results[i].buf_len = 0; | |
135 | } | |
136 | } | |
137 | ||
138 | /***************************************************************************** | |
139 | * RUNTIME calibrations framework | |
140 | *****************************************************************************/ | |
141 | ||
f0832f13 EG |
142 | /* "false alarms" are signals that our DSP tries to lock onto, |
143 | * but then determines that they are either noise, or transmissions | |
144 | * from a distant wireless network (also "noise", really) that get | |
145 | * "stepped on" by stronger transmissions within our own network. | |
146 | * This algorithm attempts to set a sensitivity level that is high | |
147 | * enough to receive all of our own network traffic, but not so | |
148 | * high that our DSP gets too busy trying to lock onto non-network | |
149 | * activity/noise. */ | |
150 | static int iwl_sens_energy_cck(struct iwl_priv *priv, | |
151 | u32 norm_fa, | |
152 | u32 rx_enable_time, | |
153 | struct statistics_general_data *rx_info) | |
154 | { | |
155 | u32 max_nrg_cck = 0; | |
156 | int i = 0; | |
157 | u8 max_silence_rssi = 0; | |
158 | u32 silence_ref = 0; | |
159 | u8 silence_rssi_a = 0; | |
160 | u8 silence_rssi_b = 0; | |
161 | u8 silence_rssi_c = 0; | |
162 | u32 val; | |
163 | ||
164 | /* "false_alarms" values below are cross-multiplications to assess the | |
165 | * numbers of false alarms within the measured period of actual Rx | |
166 | * (Rx is off when we're txing), vs the min/max expected false alarms | |
167 | * (some should be expected if rx is sensitive enough) in a | |
168 | * hypothetical listening period of 200 time units (TU), 204.8 msec: | |
169 | * | |
170 | * MIN_FA/fixed-time < false_alarms/actual-rx-time < MAX_FA/beacon-time | |
171 | * | |
172 | * */ | |
173 | u32 false_alarms = norm_fa * 200 * 1024; | |
174 | u32 max_false_alarms = MAX_FA_CCK * rx_enable_time; | |
175 | u32 min_false_alarms = MIN_FA_CCK * rx_enable_time; | |
176 | struct iwl_sensitivity_data *data = NULL; | |
177 | const struct iwl_sensitivity_ranges *ranges = priv->hw_params.sens; | |
178 | ||
179 | data = &(priv->sensitivity_data); | |
180 | ||
181 | data->nrg_auto_corr_silence_diff = 0; | |
182 | ||
183 | /* Find max silence rssi among all 3 receivers. | |
184 | * This is background noise, which may include transmissions from other | |
185 | * networks, measured during silence before our network's beacon */ | |
186 | silence_rssi_a = (u8)((rx_info->beacon_silence_rssi_a & | |
187 | ALL_BAND_FILTER) >> 8); | |
188 | silence_rssi_b = (u8)((rx_info->beacon_silence_rssi_b & | |
189 | ALL_BAND_FILTER) >> 8); | |
190 | silence_rssi_c = (u8)((rx_info->beacon_silence_rssi_c & | |
191 | ALL_BAND_FILTER) >> 8); | |
192 | ||
193 | val = max(silence_rssi_b, silence_rssi_c); | |
194 | max_silence_rssi = max(silence_rssi_a, (u8) val); | |
195 | ||
196 | /* Store silence rssi in 20-beacon history table */ | |
197 | data->nrg_silence_rssi[data->nrg_silence_idx] = max_silence_rssi; | |
198 | data->nrg_silence_idx++; | |
199 | if (data->nrg_silence_idx >= NRG_NUM_PREV_STAT_L) | |
200 | data->nrg_silence_idx = 0; | |
201 | ||
202 | /* Find max silence rssi across 20 beacon history */ | |
203 | for (i = 0; i < NRG_NUM_PREV_STAT_L; i++) { | |
204 | val = data->nrg_silence_rssi[i]; | |
205 | silence_ref = max(silence_ref, val); | |
206 | } | |
e1623446 | 207 | IWL_DEBUG_CALIB(priv, "silence a %u, b %u, c %u, 20-bcn max %u\n", |
f0832f13 EG |
208 | silence_rssi_a, silence_rssi_b, silence_rssi_c, |
209 | silence_ref); | |
210 | ||
211 | /* Find max rx energy (min value!) among all 3 receivers, | |
212 | * measured during beacon frame. | |
213 | * Save it in 10-beacon history table. */ | |
214 | i = data->nrg_energy_idx; | |
215 | val = min(rx_info->beacon_energy_b, rx_info->beacon_energy_c); | |
216 | data->nrg_value[i] = min(rx_info->beacon_energy_a, val); | |
217 | ||
218 | data->nrg_energy_idx++; | |
219 | if (data->nrg_energy_idx >= 10) | |
220 | data->nrg_energy_idx = 0; | |
221 | ||
222 | /* Find min rx energy (max value) across 10 beacon history. | |
223 | * This is the minimum signal level that we want to receive well. | |
224 | * Add backoff (margin so we don't miss slightly lower energy frames). | |
225 | * This establishes an upper bound (min value) for energy threshold. */ | |
226 | max_nrg_cck = data->nrg_value[0]; | |
227 | for (i = 1; i < 10; i++) | |
228 | max_nrg_cck = (u32) max(max_nrg_cck, (data->nrg_value[i])); | |
229 | max_nrg_cck += 6; | |
230 | ||
e1623446 | 231 | IWL_DEBUG_CALIB(priv, "rx energy a %u, b %u, c %u, 10-bcn max/min %u\n", |
f0832f13 EG |
232 | rx_info->beacon_energy_a, rx_info->beacon_energy_b, |
233 | rx_info->beacon_energy_c, max_nrg_cck - 6); | |
234 | ||
235 | /* Count number of consecutive beacons with fewer-than-desired | |
236 | * false alarms. */ | |
237 | if (false_alarms < min_false_alarms) | |
238 | data->num_in_cck_no_fa++; | |
239 | else | |
240 | data->num_in_cck_no_fa = 0; | |
e1623446 | 241 | IWL_DEBUG_CALIB(priv, "consecutive bcns with few false alarms = %u\n", |
f0832f13 EG |
242 | data->num_in_cck_no_fa); |
243 | ||
244 | /* If we got too many false alarms this time, reduce sensitivity */ | |
245 | if ((false_alarms > max_false_alarms) && | |
246 | (data->auto_corr_cck > AUTO_CORR_MAX_TH_CCK)) { | |
e1623446 | 247 | IWL_DEBUG_CALIB(priv, "norm FA %u > max FA %u\n", |
f0832f13 | 248 | false_alarms, max_false_alarms); |
e1623446 | 249 | IWL_DEBUG_CALIB(priv, "... reducing sensitivity\n"); |
f0832f13 EG |
250 | data->nrg_curr_state = IWL_FA_TOO_MANY; |
251 | /* Store for "fewer than desired" on later beacon */ | |
252 | data->nrg_silence_ref = silence_ref; | |
253 | ||
254 | /* increase energy threshold (reduce nrg value) | |
255 | * to decrease sensitivity */ | |
fe6efb4b | 256 | data->nrg_th_cck = data->nrg_th_cck - NRG_STEP_CCK; |
f0832f13 EG |
257 | /* Else if we got fewer than desired, increase sensitivity */ |
258 | } else if (false_alarms < min_false_alarms) { | |
259 | data->nrg_curr_state = IWL_FA_TOO_FEW; | |
260 | ||
261 | /* Compare silence level with silence level for most recent | |
262 | * healthy number or too many false alarms */ | |
263 | data->nrg_auto_corr_silence_diff = (s32)data->nrg_silence_ref - | |
264 | (s32)silence_ref; | |
265 | ||
e1623446 | 266 | IWL_DEBUG_CALIB(priv, "norm FA %u < min FA %u, silence diff %d\n", |
f0832f13 EG |
267 | false_alarms, min_false_alarms, |
268 | data->nrg_auto_corr_silence_diff); | |
269 | ||
270 | /* Increase value to increase sensitivity, but only if: | |
271 | * 1a) previous beacon did *not* have *too many* false alarms | |
272 | * 1b) AND there's a significant difference in Rx levels | |
273 | * from a previous beacon with too many, or healthy # FAs | |
274 | * OR 2) We've seen a lot of beacons (100) with too few | |
275 | * false alarms */ | |
276 | if ((data->nrg_prev_state != IWL_FA_TOO_MANY) && | |
277 | ((data->nrg_auto_corr_silence_diff > NRG_DIFF) || | |
278 | (data->num_in_cck_no_fa > MAX_NUMBER_CCK_NO_FA))) { | |
279 | ||
e1623446 | 280 | IWL_DEBUG_CALIB(priv, "... increasing sensitivity\n"); |
f0832f13 EG |
281 | /* Increase nrg value to increase sensitivity */ |
282 | val = data->nrg_th_cck + NRG_STEP_CCK; | |
283 | data->nrg_th_cck = min((u32)ranges->min_nrg_cck, val); | |
284 | } else { | |
e1623446 | 285 | IWL_DEBUG_CALIB(priv, "... but not changing sensitivity\n"); |
f0832f13 EG |
286 | } |
287 | ||
288 | /* Else we got a healthy number of false alarms, keep status quo */ | |
289 | } else { | |
e1623446 | 290 | IWL_DEBUG_CALIB(priv, " FA in safe zone\n"); |
f0832f13 EG |
291 | data->nrg_curr_state = IWL_FA_GOOD_RANGE; |
292 | ||
293 | /* Store for use in "fewer than desired" with later beacon */ | |
294 | data->nrg_silence_ref = silence_ref; | |
295 | ||
296 | /* If previous beacon had too many false alarms, | |
297 | * give it some extra margin by reducing sensitivity again | |
298 | * (but don't go below measured energy of desired Rx) */ | |
299 | if (IWL_FA_TOO_MANY == data->nrg_prev_state) { | |
e1623446 | 300 | IWL_DEBUG_CALIB(priv, "... increasing margin\n"); |
f0832f13 EG |
301 | if (data->nrg_th_cck > (max_nrg_cck + NRG_MARGIN)) |
302 | data->nrg_th_cck -= NRG_MARGIN; | |
303 | else | |
304 | data->nrg_th_cck = max_nrg_cck; | |
305 | } | |
306 | } | |
307 | ||
308 | /* Make sure the energy threshold does not go above the measured | |
309 | * energy of the desired Rx signals (reduced by backoff margin), | |
310 | * or else we might start missing Rx frames. | |
311 | * Lower value is higher energy, so we use max()! | |
312 | */ | |
313 | data->nrg_th_cck = max(max_nrg_cck, data->nrg_th_cck); | |
e1623446 | 314 | IWL_DEBUG_CALIB(priv, "new nrg_th_cck %u\n", data->nrg_th_cck); |
f0832f13 EG |
315 | |
316 | data->nrg_prev_state = data->nrg_curr_state; | |
317 | ||
318 | /* Auto-correlation CCK algorithm */ | |
319 | if (false_alarms > min_false_alarms) { | |
320 | ||
321 | /* increase auto_corr values to decrease sensitivity | |
322 | * so the DSP won't be disturbed by the noise | |
323 | */ | |
324 | if (data->auto_corr_cck < AUTO_CORR_MAX_TH_CCK) | |
325 | data->auto_corr_cck = AUTO_CORR_MAX_TH_CCK + 1; | |
326 | else { | |
327 | val = data->auto_corr_cck + AUTO_CORR_STEP_CCK; | |
328 | data->auto_corr_cck = | |
329 | min((u32)ranges->auto_corr_max_cck, val); | |
330 | } | |
331 | val = data->auto_corr_cck_mrc + AUTO_CORR_STEP_CCK; | |
332 | data->auto_corr_cck_mrc = | |
333 | min((u32)ranges->auto_corr_max_cck_mrc, val); | |
334 | } else if ((false_alarms < min_false_alarms) && | |
335 | ((data->nrg_auto_corr_silence_diff > NRG_DIFF) || | |
336 | (data->num_in_cck_no_fa > MAX_NUMBER_CCK_NO_FA))) { | |
337 | ||
338 | /* Decrease auto_corr values to increase sensitivity */ | |
339 | val = data->auto_corr_cck - AUTO_CORR_STEP_CCK; | |
340 | data->auto_corr_cck = | |
341 | max((u32)ranges->auto_corr_min_cck, val); | |
342 | val = data->auto_corr_cck_mrc - AUTO_CORR_STEP_CCK; | |
343 | data->auto_corr_cck_mrc = | |
344 | max((u32)ranges->auto_corr_min_cck_mrc, val); | |
345 | } | |
346 | ||
347 | return 0; | |
348 | } | |
349 | ||
350 | ||
351 | static int iwl_sens_auto_corr_ofdm(struct iwl_priv *priv, | |
352 | u32 norm_fa, | |
353 | u32 rx_enable_time) | |
354 | { | |
355 | u32 val; | |
356 | u32 false_alarms = norm_fa * 200 * 1024; | |
357 | u32 max_false_alarms = MAX_FA_OFDM * rx_enable_time; | |
358 | u32 min_false_alarms = MIN_FA_OFDM * rx_enable_time; | |
359 | struct iwl_sensitivity_data *data = NULL; | |
360 | const struct iwl_sensitivity_ranges *ranges = priv->hw_params.sens; | |
361 | ||
362 | data = &(priv->sensitivity_data); | |
363 | ||
364 | /* If we got too many false alarms this time, reduce sensitivity */ | |
365 | if (false_alarms > max_false_alarms) { | |
366 | ||
e1623446 | 367 | IWL_DEBUG_CALIB(priv, "norm FA %u > max FA %u)\n", |
f0832f13 EG |
368 | false_alarms, max_false_alarms); |
369 | ||
370 | val = data->auto_corr_ofdm + AUTO_CORR_STEP_OFDM; | |
371 | data->auto_corr_ofdm = | |
372 | min((u32)ranges->auto_corr_max_ofdm, val); | |
373 | ||
374 | val = data->auto_corr_ofdm_mrc + AUTO_CORR_STEP_OFDM; | |
375 | data->auto_corr_ofdm_mrc = | |
376 | min((u32)ranges->auto_corr_max_ofdm_mrc, val); | |
377 | ||
378 | val = data->auto_corr_ofdm_x1 + AUTO_CORR_STEP_OFDM; | |
379 | data->auto_corr_ofdm_x1 = | |
380 | min((u32)ranges->auto_corr_max_ofdm_x1, val); | |
381 | ||
382 | val = data->auto_corr_ofdm_mrc_x1 + AUTO_CORR_STEP_OFDM; | |
383 | data->auto_corr_ofdm_mrc_x1 = | |
384 | min((u32)ranges->auto_corr_max_ofdm_mrc_x1, val); | |
385 | } | |
386 | ||
387 | /* Else if we got fewer than desired, increase sensitivity */ | |
388 | else if (false_alarms < min_false_alarms) { | |
389 | ||
e1623446 | 390 | IWL_DEBUG_CALIB(priv, "norm FA %u < min FA %u\n", |
f0832f13 EG |
391 | false_alarms, min_false_alarms); |
392 | ||
393 | val = data->auto_corr_ofdm - AUTO_CORR_STEP_OFDM; | |
394 | data->auto_corr_ofdm = | |
395 | max((u32)ranges->auto_corr_min_ofdm, val); | |
396 | ||
397 | val = data->auto_corr_ofdm_mrc - AUTO_CORR_STEP_OFDM; | |
398 | data->auto_corr_ofdm_mrc = | |
399 | max((u32)ranges->auto_corr_min_ofdm_mrc, val); | |
400 | ||
401 | val = data->auto_corr_ofdm_x1 - AUTO_CORR_STEP_OFDM; | |
402 | data->auto_corr_ofdm_x1 = | |
403 | max((u32)ranges->auto_corr_min_ofdm_x1, val); | |
404 | ||
405 | val = data->auto_corr_ofdm_mrc_x1 - AUTO_CORR_STEP_OFDM; | |
406 | data->auto_corr_ofdm_mrc_x1 = | |
407 | max((u32)ranges->auto_corr_min_ofdm_mrc_x1, val); | |
408 | } else { | |
e1623446 | 409 | IWL_DEBUG_CALIB(priv, "min FA %u < norm FA %u < max FA %u OK\n", |
f0832f13 EG |
410 | min_false_alarms, false_alarms, max_false_alarms); |
411 | } | |
412 | return 0; | |
413 | } | |
414 | ||
c8312fac WYG |
415 | static void iwl_prepare_legacy_sensitivity_tbl(struct iwl_priv *priv, |
416 | struct iwl_sensitivity_data *data, | |
417 | __le16 *tbl) | |
f0832f13 | 418 | { |
c8312fac | 419 | tbl[HD_AUTO_CORR32_X4_TH_ADD_MIN_INDEX] = |
f0832f13 | 420 | cpu_to_le16((u16)data->auto_corr_ofdm); |
c8312fac | 421 | tbl[HD_AUTO_CORR32_X4_TH_ADD_MIN_MRC_INDEX] = |
f0832f13 | 422 | cpu_to_le16((u16)data->auto_corr_ofdm_mrc); |
c8312fac | 423 | tbl[HD_AUTO_CORR32_X1_TH_ADD_MIN_INDEX] = |
f0832f13 | 424 | cpu_to_le16((u16)data->auto_corr_ofdm_x1); |
c8312fac | 425 | tbl[HD_AUTO_CORR32_X1_TH_ADD_MIN_MRC_INDEX] = |
f0832f13 EG |
426 | cpu_to_le16((u16)data->auto_corr_ofdm_mrc_x1); |
427 | ||
c8312fac | 428 | tbl[HD_AUTO_CORR40_X4_TH_ADD_MIN_INDEX] = |
f0832f13 | 429 | cpu_to_le16((u16)data->auto_corr_cck); |
c8312fac | 430 | tbl[HD_AUTO_CORR40_X4_TH_ADD_MIN_MRC_INDEX] = |
f0832f13 EG |
431 | cpu_to_le16((u16)data->auto_corr_cck_mrc); |
432 | ||
c8312fac | 433 | tbl[HD_MIN_ENERGY_CCK_DET_INDEX] = |
f0832f13 | 434 | cpu_to_le16((u16)data->nrg_th_cck); |
c8312fac | 435 | tbl[HD_MIN_ENERGY_OFDM_DET_INDEX] = |
f0832f13 EG |
436 | cpu_to_le16((u16)data->nrg_th_ofdm); |
437 | ||
c8312fac | 438 | tbl[HD_BARKER_CORR_TH_ADD_MIN_INDEX] = |
55036d66 | 439 | cpu_to_le16(data->barker_corr_th_min); |
c8312fac | 440 | tbl[HD_BARKER_CORR_TH_ADD_MIN_MRC_INDEX] = |
55036d66 | 441 | cpu_to_le16(data->barker_corr_th_min_mrc); |
c8312fac | 442 | tbl[HD_OFDM_ENERGY_TH_IN_INDEX] = |
55036d66 | 443 | cpu_to_le16(data->nrg_th_cca); |
f0832f13 | 444 | |
e1623446 | 445 | IWL_DEBUG_CALIB(priv, "ofdm: ac %u mrc %u x1 %u mrc_x1 %u thresh %u\n", |
f0832f13 EG |
446 | data->auto_corr_ofdm, data->auto_corr_ofdm_mrc, |
447 | data->auto_corr_ofdm_x1, data->auto_corr_ofdm_mrc_x1, | |
448 | data->nrg_th_ofdm); | |
449 | ||
e1623446 | 450 | IWL_DEBUG_CALIB(priv, "cck: ac %u mrc %u thresh %u\n", |
f0832f13 EG |
451 | data->auto_corr_cck, data->auto_corr_cck_mrc, |
452 | data->nrg_th_cck); | |
c8312fac WYG |
453 | } |
454 | ||
455 | /* Prepare a SENSITIVITY_CMD, send to uCode if values have changed */ | |
456 | static int iwl_sensitivity_write(struct iwl_priv *priv) | |
457 | { | |
458 | struct iwl_sensitivity_cmd cmd; | |
459 | struct iwl_sensitivity_data *data = NULL; | |
460 | struct iwl_host_cmd cmd_out = { | |
461 | .id = SENSITIVITY_CMD, | |
3fa50738 | 462 | .len = { sizeof(struct iwl_sensitivity_cmd), }, |
c8312fac | 463 | .flags = CMD_ASYNC, |
3fa50738 | 464 | .data = { &cmd, }, |
c8312fac WYG |
465 | }; |
466 | ||
467 | data = &(priv->sensitivity_data); | |
468 | ||
469 | memset(&cmd, 0, sizeof(cmd)); | |
470 | ||
471 | iwl_prepare_legacy_sensitivity_tbl(priv, data, &cmd.table[0]); | |
f0832f13 EG |
472 | |
473 | /* Update uCode's "work" table, and copy it to DSP */ | |
474 | cmd.control = SENSITIVITY_CMD_CONTROL_WORK_TABLE; | |
475 | ||
476 | /* Don't send command to uCode if nothing has changed */ | |
477 | if (!memcmp(&cmd.table[0], &(priv->sensitivity_tbl[0]), | |
478 | sizeof(u16)*HD_TABLE_SIZE)) { | |
e1623446 | 479 | IWL_DEBUG_CALIB(priv, "No change in SENSITIVITY_CMD\n"); |
f0832f13 EG |
480 | return 0; |
481 | } | |
482 | ||
483 | /* Copy table for comparison next time */ | |
484 | memcpy(&(priv->sensitivity_tbl[0]), &(cmd.table[0]), | |
485 | sizeof(u16)*HD_TABLE_SIZE); | |
486 | ||
41c50542 | 487 | return trans_send_cmd(&priv->trans, &cmd_out); |
f0832f13 EG |
488 | } |
489 | ||
c8312fac WYG |
490 | /* Prepare a SENSITIVITY_CMD, send to uCode if values have changed */ |
491 | static int iwl_enhance_sensitivity_write(struct iwl_priv *priv) | |
492 | { | |
493 | struct iwl_enhance_sensitivity_cmd cmd; | |
494 | struct iwl_sensitivity_data *data = NULL; | |
495 | struct iwl_host_cmd cmd_out = { | |
496 | .id = SENSITIVITY_CMD, | |
3fa50738 | 497 | .len = { sizeof(struct iwl_enhance_sensitivity_cmd), }, |
c8312fac | 498 | .flags = CMD_ASYNC, |
3fa50738 | 499 | .data = { &cmd, }, |
c8312fac WYG |
500 | }; |
501 | ||
502 | data = &(priv->sensitivity_data); | |
503 | ||
504 | memset(&cmd, 0, sizeof(cmd)); | |
505 | ||
506 | iwl_prepare_legacy_sensitivity_tbl(priv, data, &cmd.enhance_table[0]); | |
507 | ||
508 | cmd.enhance_table[HD_INA_NON_SQUARE_DET_OFDM_INDEX] = | |
509 | HD_INA_NON_SQUARE_DET_OFDM_DATA; | |
510 | cmd.enhance_table[HD_INA_NON_SQUARE_DET_CCK_INDEX] = | |
511 | HD_INA_NON_SQUARE_DET_CCK_DATA; | |
512 | cmd.enhance_table[HD_CORR_11_INSTEAD_OF_CORR_9_EN_INDEX] = | |
513 | HD_CORR_11_INSTEAD_OF_CORR_9_EN_DATA; | |
514 | cmd.enhance_table[HD_OFDM_NON_SQUARE_DET_SLOPE_MRC_INDEX] = | |
515 | HD_OFDM_NON_SQUARE_DET_SLOPE_MRC_DATA; | |
516 | cmd.enhance_table[HD_OFDM_NON_SQUARE_DET_INTERCEPT_MRC_INDEX] = | |
517 | HD_OFDM_NON_SQUARE_DET_INTERCEPT_MRC_DATA; | |
518 | cmd.enhance_table[HD_OFDM_NON_SQUARE_DET_SLOPE_INDEX] = | |
519 | HD_OFDM_NON_SQUARE_DET_SLOPE_DATA; | |
520 | cmd.enhance_table[HD_OFDM_NON_SQUARE_DET_INTERCEPT_INDEX] = | |
521 | HD_OFDM_NON_SQUARE_DET_INTERCEPT_DATA; | |
522 | cmd.enhance_table[HD_CCK_NON_SQUARE_DET_SLOPE_MRC_INDEX] = | |
523 | HD_CCK_NON_SQUARE_DET_SLOPE_MRC_DATA; | |
524 | cmd.enhance_table[HD_CCK_NON_SQUARE_DET_INTERCEPT_MRC_INDEX] = | |
525 | HD_CCK_NON_SQUARE_DET_INTERCEPT_MRC_DATA; | |
526 | cmd.enhance_table[HD_CCK_NON_SQUARE_DET_SLOPE_INDEX] = | |
527 | HD_CCK_NON_SQUARE_DET_SLOPE_DATA; | |
528 | cmd.enhance_table[HD_CCK_NON_SQUARE_DET_INTERCEPT_INDEX] = | |
529 | HD_CCK_NON_SQUARE_DET_INTERCEPT_DATA; | |
530 | ||
531 | /* Update uCode's "work" table, and copy it to DSP */ | |
532 | cmd.control = SENSITIVITY_CMD_CONTROL_WORK_TABLE; | |
533 | ||
534 | /* Don't send command to uCode if nothing has changed */ | |
535 | if (!memcmp(&cmd.enhance_table[0], &(priv->sensitivity_tbl[0]), | |
536 | sizeof(u16)*HD_TABLE_SIZE) && | |
537 | !memcmp(&cmd.enhance_table[HD_INA_NON_SQUARE_DET_OFDM_INDEX], | |
538 | &(priv->enhance_sensitivity_tbl[0]), | |
539 | sizeof(u16)*ENHANCE_HD_TABLE_ENTRIES)) { | |
540 | IWL_DEBUG_CALIB(priv, "No change in SENSITIVITY_CMD\n"); | |
541 | return 0; | |
542 | } | |
543 | ||
544 | /* Copy table for comparison next time */ | |
545 | memcpy(&(priv->sensitivity_tbl[0]), &(cmd.enhance_table[0]), | |
546 | sizeof(u16)*HD_TABLE_SIZE); | |
547 | memcpy(&(priv->enhance_sensitivity_tbl[0]), | |
548 | &(cmd.enhance_table[HD_INA_NON_SQUARE_DET_OFDM_INDEX]), | |
549 | sizeof(u16)*ENHANCE_HD_TABLE_ENTRIES); | |
550 | ||
41c50542 | 551 | return trans_send_cmd(&priv->trans, &cmd_out); |
c8312fac WYG |
552 | } |
553 | ||
f0832f13 EG |
554 | void iwl_init_sensitivity(struct iwl_priv *priv) |
555 | { | |
556 | int ret = 0; | |
557 | int i; | |
558 | struct iwl_sensitivity_data *data = NULL; | |
559 | const struct iwl_sensitivity_ranges *ranges = priv->hw_params.sens; | |
560 | ||
445c2dff TW |
561 | if (priv->disable_sens_cal) |
562 | return; | |
563 | ||
e1623446 | 564 | IWL_DEBUG_CALIB(priv, "Start iwl_init_sensitivity\n"); |
f0832f13 EG |
565 | |
566 | /* Clear driver's sensitivity algo data */ | |
567 | data = &(priv->sensitivity_data); | |
568 | ||
569 | if (ranges == NULL) | |
f0832f13 EG |
570 | return; |
571 | ||
572 | memset(data, 0, sizeof(struct iwl_sensitivity_data)); | |
573 | ||
574 | data->num_in_cck_no_fa = 0; | |
575 | data->nrg_curr_state = IWL_FA_TOO_MANY; | |
576 | data->nrg_prev_state = IWL_FA_TOO_MANY; | |
577 | data->nrg_silence_ref = 0; | |
578 | data->nrg_silence_idx = 0; | |
579 | data->nrg_energy_idx = 0; | |
580 | ||
581 | for (i = 0; i < 10; i++) | |
582 | data->nrg_value[i] = 0; | |
583 | ||
584 | for (i = 0; i < NRG_NUM_PREV_STAT_L; i++) | |
585 | data->nrg_silence_rssi[i] = 0; | |
586 | ||
f3a2a424 | 587 | data->auto_corr_ofdm = ranges->auto_corr_min_ofdm; |
f0832f13 EG |
588 | data->auto_corr_ofdm_mrc = ranges->auto_corr_min_ofdm_mrc; |
589 | data->auto_corr_ofdm_x1 = ranges->auto_corr_min_ofdm_x1; | |
590 | data->auto_corr_ofdm_mrc_x1 = ranges->auto_corr_min_ofdm_mrc_x1; | |
591 | data->auto_corr_cck = AUTO_CORR_CCK_MIN_VAL_DEF; | |
592 | data->auto_corr_cck_mrc = ranges->auto_corr_min_cck_mrc; | |
593 | data->nrg_th_cck = ranges->nrg_th_cck; | |
594 | data->nrg_th_ofdm = ranges->nrg_th_ofdm; | |
55036d66 WYG |
595 | data->barker_corr_th_min = ranges->barker_corr_th_min; |
596 | data->barker_corr_th_min_mrc = ranges->barker_corr_th_min_mrc; | |
597 | data->nrg_th_cca = ranges->nrg_th_cca; | |
f0832f13 EG |
598 | |
599 | data->last_bad_plcp_cnt_ofdm = 0; | |
600 | data->last_fa_cnt_ofdm = 0; | |
601 | data->last_bad_plcp_cnt_cck = 0; | |
602 | data->last_fa_cnt_cck = 0; | |
603 | ||
c8312fac WYG |
604 | if (priv->enhance_sensitivity_table) |
605 | ret |= iwl_enhance_sensitivity_write(priv); | |
606 | else | |
607 | ret |= iwl_sensitivity_write(priv); | |
e1623446 | 608 | IWL_DEBUG_CALIB(priv, "<<return 0x%X\n", ret); |
f0832f13 | 609 | } |
f0832f13 | 610 | |
0da0e5bf | 611 | void iwl_sensitivity_calibration(struct iwl_priv *priv) |
f0832f13 EG |
612 | { |
613 | u32 rx_enable_time; | |
614 | u32 fa_cck; | |
615 | u32 fa_ofdm; | |
616 | u32 bad_plcp_cck; | |
617 | u32 bad_plcp_ofdm; | |
618 | u32 norm_fa_ofdm; | |
619 | u32 norm_fa_cck; | |
620 | struct iwl_sensitivity_data *data = NULL; | |
7980fba5 WYG |
621 | struct statistics_rx_non_phy *rx_info; |
622 | struct statistics_rx_phy *ofdm, *cck; | |
f0832f13 EG |
623 | unsigned long flags; |
624 | struct statistics_general_data statis; | |
625 | ||
445c2dff TW |
626 | if (priv->disable_sens_cal) |
627 | return; | |
628 | ||
f0832f13 EG |
629 | data = &(priv->sensitivity_data); |
630 | ||
246ed355 | 631 | if (!iwl_is_any_associated(priv)) { |
e1623446 | 632 | IWL_DEBUG_CALIB(priv, "<< - not associated\n"); |
f0832f13 EG |
633 | return; |
634 | } | |
635 | ||
636 | spin_lock_irqsave(&priv->lock, flags); | |
0da0e5bf JB |
637 | rx_info = &priv->statistics.rx_non_phy; |
638 | ofdm = &priv->statistics.rx_ofdm; | |
639 | cck = &priv->statistics.rx_cck; | |
f0832f13 | 640 | if (rx_info->interference_data_flag != INTERFERENCE_DATA_AVAILABLE) { |
e1623446 | 641 | IWL_DEBUG_CALIB(priv, "<< invalid data.\n"); |
f0832f13 EG |
642 | spin_unlock_irqrestore(&priv->lock, flags); |
643 | return; | |
644 | } | |
645 | ||
646 | /* Extract Statistics: */ | |
647 | rx_enable_time = le32_to_cpu(rx_info->channel_load); | |
7980fba5 WYG |
648 | fa_cck = le32_to_cpu(cck->false_alarm_cnt); |
649 | fa_ofdm = le32_to_cpu(ofdm->false_alarm_cnt); | |
650 | bad_plcp_cck = le32_to_cpu(cck->plcp_err); | |
651 | bad_plcp_ofdm = le32_to_cpu(ofdm->plcp_err); | |
f0832f13 EG |
652 | |
653 | statis.beacon_silence_rssi_a = | |
7980fba5 | 654 | le32_to_cpu(rx_info->beacon_silence_rssi_a); |
f0832f13 | 655 | statis.beacon_silence_rssi_b = |
7980fba5 | 656 | le32_to_cpu(rx_info->beacon_silence_rssi_b); |
f0832f13 | 657 | statis.beacon_silence_rssi_c = |
7980fba5 | 658 | le32_to_cpu(rx_info->beacon_silence_rssi_c); |
f0832f13 | 659 | statis.beacon_energy_a = |
7980fba5 | 660 | le32_to_cpu(rx_info->beacon_energy_a); |
f0832f13 | 661 | statis.beacon_energy_b = |
7980fba5 | 662 | le32_to_cpu(rx_info->beacon_energy_b); |
f0832f13 | 663 | statis.beacon_energy_c = |
7980fba5 | 664 | le32_to_cpu(rx_info->beacon_energy_c); |
f0832f13 EG |
665 | |
666 | spin_unlock_irqrestore(&priv->lock, flags); | |
667 | ||
e1623446 | 668 | IWL_DEBUG_CALIB(priv, "rx_enable_time = %u usecs\n", rx_enable_time); |
f0832f13 EG |
669 | |
670 | if (!rx_enable_time) { | |
91dd6c27 | 671 | IWL_DEBUG_CALIB(priv, "<< RX Enable Time == 0!\n"); |
f0832f13 EG |
672 | return; |
673 | } | |
674 | ||
675 | /* These statistics increase monotonically, and do not reset | |
676 | * at each beacon. Calculate difference from last value, or just | |
677 | * use the new statistics value if it has reset or wrapped around. */ | |
678 | if (data->last_bad_plcp_cnt_cck > bad_plcp_cck) | |
679 | data->last_bad_plcp_cnt_cck = bad_plcp_cck; | |
680 | else { | |
681 | bad_plcp_cck -= data->last_bad_plcp_cnt_cck; | |
682 | data->last_bad_plcp_cnt_cck += bad_plcp_cck; | |
683 | } | |
684 | ||
685 | if (data->last_bad_plcp_cnt_ofdm > bad_plcp_ofdm) | |
686 | data->last_bad_plcp_cnt_ofdm = bad_plcp_ofdm; | |
687 | else { | |
688 | bad_plcp_ofdm -= data->last_bad_plcp_cnt_ofdm; | |
689 | data->last_bad_plcp_cnt_ofdm += bad_plcp_ofdm; | |
690 | } | |
691 | ||
692 | if (data->last_fa_cnt_ofdm > fa_ofdm) | |
693 | data->last_fa_cnt_ofdm = fa_ofdm; | |
694 | else { | |
695 | fa_ofdm -= data->last_fa_cnt_ofdm; | |
696 | data->last_fa_cnt_ofdm += fa_ofdm; | |
697 | } | |
698 | ||
699 | if (data->last_fa_cnt_cck > fa_cck) | |
700 | data->last_fa_cnt_cck = fa_cck; | |
701 | else { | |
702 | fa_cck -= data->last_fa_cnt_cck; | |
703 | data->last_fa_cnt_cck += fa_cck; | |
704 | } | |
705 | ||
706 | /* Total aborted signal locks */ | |
707 | norm_fa_ofdm = fa_ofdm + bad_plcp_ofdm; | |
708 | norm_fa_cck = fa_cck + bad_plcp_cck; | |
709 | ||
e1623446 | 710 | IWL_DEBUG_CALIB(priv, "cck: fa %u badp %u ofdm: fa %u badp %u\n", fa_cck, |
f0832f13 EG |
711 | bad_plcp_cck, fa_ofdm, bad_plcp_ofdm); |
712 | ||
713 | iwl_sens_auto_corr_ofdm(priv, norm_fa_ofdm, rx_enable_time); | |
714 | iwl_sens_energy_cck(priv, norm_fa_cck, rx_enable_time, &statis); | |
c8312fac WYG |
715 | if (priv->enhance_sensitivity_table) |
716 | iwl_enhance_sensitivity_write(priv); | |
717 | else | |
718 | iwl_sensitivity_write(priv); | |
f0832f13 | 719 | } |
f0832f13 | 720 | |
d8c07e7a WYG |
721 | static inline u8 find_first_chain(u8 mask) |
722 | { | |
723 | if (mask & ANT_A) | |
724 | return CHAIN_A; | |
725 | if (mask & ANT_B) | |
726 | return CHAIN_B; | |
727 | return CHAIN_C; | |
728 | } | |
729 | ||
3031242b SZ |
730 | /** |
731 | * Run disconnected antenna algorithm to find out which antennas are | |
732 | * disconnected. | |
733 | */ | |
734 | static void iwl_find_disconn_antenna(struct iwl_priv *priv, u32* average_sig, | |
735 | struct iwl_chain_noise_data *data) | |
736 | { | |
737 | u32 active_chains = 0; | |
738 | u32 max_average_sig; | |
739 | u16 max_average_sig_antenna_i; | |
740 | u8 num_tx_chains; | |
741 | u8 first_chain; | |
742 | u16 i = 0; | |
743 | ||
744 | average_sig[0] = data->chain_signal_a / | |
745 | priv->cfg->base_params->chain_noise_num_beacons; | |
746 | average_sig[1] = data->chain_signal_b / | |
747 | priv->cfg->base_params->chain_noise_num_beacons; | |
748 | average_sig[2] = data->chain_signal_c / | |
749 | priv->cfg->base_params->chain_noise_num_beacons; | |
750 | ||
751 | if (average_sig[0] >= average_sig[1]) { | |
752 | max_average_sig = average_sig[0]; | |
753 | max_average_sig_antenna_i = 0; | |
754 | active_chains = (1 << max_average_sig_antenna_i); | |
755 | } else { | |
756 | max_average_sig = average_sig[1]; | |
757 | max_average_sig_antenna_i = 1; | |
758 | active_chains = (1 << max_average_sig_antenna_i); | |
759 | } | |
760 | ||
761 | if (average_sig[2] >= max_average_sig) { | |
762 | max_average_sig = average_sig[2]; | |
763 | max_average_sig_antenna_i = 2; | |
764 | active_chains = (1 << max_average_sig_antenna_i); | |
765 | } | |
766 | ||
767 | IWL_DEBUG_CALIB(priv, "average_sig: a %d b %d c %d\n", | |
768 | average_sig[0], average_sig[1], average_sig[2]); | |
769 | IWL_DEBUG_CALIB(priv, "max_average_sig = %d, antenna %d\n", | |
770 | max_average_sig, max_average_sig_antenna_i); | |
771 | ||
772 | /* Compare signal strengths for all 3 receivers. */ | |
773 | for (i = 0; i < NUM_RX_CHAINS; i++) { | |
774 | if (i != max_average_sig_antenna_i) { | |
775 | s32 rssi_delta = (max_average_sig - average_sig[i]); | |
776 | ||
777 | /* If signal is very weak, compared with | |
778 | * strongest, mark it as disconnected. */ | |
779 | if (rssi_delta > MAXIMUM_ALLOWED_PATHLOSS) | |
780 | data->disconn_array[i] = 1; | |
781 | else | |
782 | active_chains |= (1 << i); | |
783 | IWL_DEBUG_CALIB(priv, "i = %d rssiDelta = %d " | |
784 | "disconn_array[i] = %d\n", | |
785 | i, rssi_delta, data->disconn_array[i]); | |
786 | } | |
787 | } | |
788 | ||
789 | /* | |
790 | * The above algorithm sometimes fails when the ucode | |
791 | * reports 0 for all chains. It's not clear why that | |
792 | * happens to start with, but it is then causing trouble | |
793 | * because this can make us enable more chains than the | |
794 | * hardware really has. | |
795 | * | |
796 | * To be safe, simply mask out any chains that we know | |
797 | * are not on the device. | |
798 | */ | |
6fe8efb2 | 799 | active_chains &= priv->hw_params.valid_rx_ant; |
3031242b SZ |
800 | |
801 | num_tx_chains = 0; | |
802 | for (i = 0; i < NUM_RX_CHAINS; i++) { | |
803 | /* loops on all the bits of | |
804 | * priv->hw_setting.valid_tx_ant */ | |
805 | u8 ant_msk = (1 << i); | |
806 | if (!(priv->hw_params.valid_tx_ant & ant_msk)) | |
807 | continue; | |
808 | ||
809 | num_tx_chains++; | |
810 | if (data->disconn_array[i] == 0) | |
811 | /* there is a Tx antenna connected */ | |
812 | break; | |
813 | if (num_tx_chains == priv->hw_params.tx_chains_num && | |
814 | data->disconn_array[i]) { | |
815 | /* | |
816 | * If all chains are disconnected | |
817 | * connect the first valid tx chain | |
818 | */ | |
819 | first_chain = | |
820 | find_first_chain(priv->cfg->valid_tx_ant); | |
821 | data->disconn_array[first_chain] = 0; | |
822 | active_chains |= BIT(first_chain); | |
85ee7a1d JP |
823 | IWL_DEBUG_CALIB(priv, |
824 | "All Tx chains are disconnected W/A - declare %d as connected\n", | |
3031242b SZ |
825 | first_chain); |
826 | break; | |
827 | } | |
828 | } | |
829 | ||
830 | if (active_chains != priv->hw_params.valid_rx_ant && | |
831 | active_chains != priv->chain_noise_data.active_chains) | |
832 | IWL_DEBUG_CALIB(priv, | |
833 | "Detected that not all antennas are connected! " | |
834 | "Connected: %#x, valid: %#x.\n", | |
835 | active_chains, priv->hw_params.valid_rx_ant); | |
836 | ||
837 | /* Save for use within RXON, TX, SCAN commands, etc. */ | |
838 | data->active_chains = active_chains; | |
839 | IWL_DEBUG_CALIB(priv, "active_chains (bitwise) = 0x%x\n", | |
840 | active_chains); | |
841 | } | |
842 | ||
e505c433 WYG |
843 | static void iwlagn_gain_computation(struct iwl_priv *priv, |
844 | u32 average_noise[NUM_RX_CHAINS], | |
845 | u16 min_average_noise_antenna_i, | |
846 | u32 min_average_noise, | |
847 | u8 default_chain) | |
848 | { | |
849 | int i; | |
850 | s32 delta_g; | |
851 | struct iwl_chain_noise_data *data = &priv->chain_noise_data; | |
852 | ||
853 | /* | |
854 | * Find Gain Code for the chains based on "default chain" | |
855 | */ | |
856 | for (i = default_chain + 1; i < NUM_RX_CHAINS; i++) { | |
857 | if ((data->disconn_array[i])) { | |
858 | data->delta_gain_code[i] = 0; | |
859 | continue; | |
860 | } | |
861 | ||
862 | delta_g = (priv->cfg->base_params->chain_noise_scale * | |
863 | ((s32)average_noise[default_chain] - | |
864 | (s32)average_noise[i])) / 1500; | |
865 | ||
866 | /* bound gain by 2 bits value max, 3rd bit is sign */ | |
867 | data->delta_gain_code[i] = | |
868 | min(abs(delta_g), | |
869 | (long) CHAIN_NOISE_MAX_DELTA_GAIN_CODE); | |
870 | ||
871 | if (delta_g < 0) | |
872 | /* | |
873 | * set negative sign ... | |
874 | * note to Intel developers: This is uCode API format, | |
875 | * not the format of any internal device registers. | |
876 | * Do not change this format for e.g. 6050 or similar | |
877 | * devices. Change format only if more resolution | |
878 | * (i.e. more than 2 bits magnitude) is needed. | |
879 | */ | |
880 | data->delta_gain_code[i] |= (1 << 2); | |
881 | } | |
882 | ||
883 | IWL_DEBUG_CALIB(priv, "Delta gains: ANT_B = %d ANT_C = %d\n", | |
884 | data->delta_gain_code[1], data->delta_gain_code[2]); | |
885 | ||
886 | if (!data->radio_write) { | |
887 | struct iwl_calib_chain_noise_gain_cmd cmd; | |
888 | ||
889 | memset(&cmd, 0, sizeof(cmd)); | |
890 | ||
891 | iwl_set_calib_hdr(&cmd.hdr, | |
898ed67b | 892 | priv->phy_calib_chain_noise_gain_cmd); |
e505c433 WYG |
893 | cmd.delta_gain_1 = data->delta_gain_code[1]; |
894 | cmd.delta_gain_2 = data->delta_gain_code[2]; | |
41c50542 | 895 | trans_send_cmd_pdu(&priv->trans, REPLY_PHY_CALIBRATION_CMD, |
e505c433 WYG |
896 | CMD_ASYNC, sizeof(cmd), &cmd); |
897 | ||
898 | data->radio_write = 1; | |
899 | data->state = IWL_CHAIN_NOISE_CALIBRATED; | |
900 | } | |
901 | } | |
3031242b | 902 | |
f0832f13 | 903 | /* |
3031242b | 904 | * Accumulate 16 beacons of signal and noise statistics for each of |
f0832f13 EG |
905 | * 3 receivers/antennas/rx-chains, then figure out: |
906 | * 1) Which antennas are connected. | |
907 | * 2) Differential rx gain settings to balance the 3 receivers. | |
908 | */ | |
0da0e5bf | 909 | void iwl_chain_noise_calibration(struct iwl_priv *priv) |
f0832f13 EG |
910 | { |
911 | struct iwl_chain_noise_data *data = NULL; | |
912 | ||
913 | u32 chain_noise_a; | |
914 | u32 chain_noise_b; | |
915 | u32 chain_noise_c; | |
916 | u32 chain_sig_a; | |
917 | u32 chain_sig_b; | |
918 | u32 chain_sig_c; | |
919 | u32 average_sig[NUM_RX_CHAINS] = {INITIALIZATION_VALUE}; | |
920 | u32 average_noise[NUM_RX_CHAINS] = {INITIALIZATION_VALUE}; | |
f0832f13 EG |
921 | u32 min_average_noise = MIN_AVERAGE_NOISE_MAX_VALUE; |
922 | u16 min_average_noise_antenna_i = INITIALIZATION_VALUE; | |
923 | u16 i = 0; | |
924 | u16 rxon_chnum = INITIALIZATION_VALUE; | |
925 | u16 stat_chnum = INITIALIZATION_VALUE; | |
926 | u8 rxon_band24; | |
927 | u8 stat_band24; | |
f0832f13 | 928 | unsigned long flags; |
7980fba5 | 929 | struct statistics_rx_non_phy *rx_info; |
3031242b | 930 | |
246ed355 JB |
931 | /* |
932 | * MULTI-FIXME: | |
933 | * When we support multiple interfaces on different channels, | |
934 | * this must be modified/fixed. | |
935 | */ | |
936 | struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS]; | |
f0832f13 | 937 | |
445c2dff TW |
938 | if (priv->disable_chain_noise_cal) |
939 | return; | |
940 | ||
f0832f13 EG |
941 | data = &(priv->chain_noise_data); |
942 | ||
d8c07e7a WYG |
943 | /* |
944 | * Accumulate just the first "chain_noise_num_beacons" after | |
945 | * the first association, then we're done forever. | |
946 | */ | |
f0832f13 EG |
947 | if (data->state != IWL_CHAIN_NOISE_ACCUMULATE) { |
948 | if (data->state == IWL_CHAIN_NOISE_ALIVE) | |
e1623446 | 949 | IWL_DEBUG_CALIB(priv, "Wait for noise calib reset\n"); |
f0832f13 EG |
950 | return; |
951 | } | |
952 | ||
953 | spin_lock_irqsave(&priv->lock, flags); | |
0da0e5bf JB |
954 | |
955 | rx_info = &priv->statistics.rx_non_phy; | |
956 | ||
f0832f13 | 957 | if (rx_info->interference_data_flag != INTERFERENCE_DATA_AVAILABLE) { |
e1623446 | 958 | IWL_DEBUG_CALIB(priv, " << Interference data unavailable\n"); |
f0832f13 EG |
959 | spin_unlock_irqrestore(&priv->lock, flags); |
960 | return; | |
961 | } | |
962 | ||
246ed355 JB |
963 | rxon_band24 = !!(ctx->staging.flags & RXON_FLG_BAND_24G_MSK); |
964 | rxon_chnum = le16_to_cpu(ctx->staging.channel); | |
0da0e5bf JB |
965 | stat_band24 = |
966 | !!(priv->statistics.flag & STATISTICS_REPLY_FLG_BAND_24G_MSK); | |
967 | stat_chnum = le32_to_cpu(priv->statistics.flag) >> 16; | |
f0832f13 EG |
968 | |
969 | /* Make sure we accumulate data for just the associated channel | |
970 | * (even if scanning). */ | |
971 | if ((rxon_chnum != stat_chnum) || (rxon_band24 != stat_band24)) { | |
e1623446 | 972 | IWL_DEBUG_CALIB(priv, "Stats not from chan=%d, band24=%d\n", |
f0832f13 EG |
973 | rxon_chnum, rxon_band24); |
974 | spin_unlock_irqrestore(&priv->lock, flags); | |
975 | return; | |
976 | } | |
977 | ||
d8c07e7a WYG |
978 | /* |
979 | * Accumulate beacon statistics values across | |
980 | * "chain_noise_num_beacons" | |
981 | */ | |
f0832f13 EG |
982 | chain_noise_a = le32_to_cpu(rx_info->beacon_silence_rssi_a) & |
983 | IN_BAND_FILTER; | |
984 | chain_noise_b = le32_to_cpu(rx_info->beacon_silence_rssi_b) & | |
985 | IN_BAND_FILTER; | |
986 | chain_noise_c = le32_to_cpu(rx_info->beacon_silence_rssi_c) & | |
987 | IN_BAND_FILTER; | |
988 | ||
989 | chain_sig_a = le32_to_cpu(rx_info->beacon_rssi_a) & IN_BAND_FILTER; | |
990 | chain_sig_b = le32_to_cpu(rx_info->beacon_rssi_b) & IN_BAND_FILTER; | |
991 | chain_sig_c = le32_to_cpu(rx_info->beacon_rssi_c) & IN_BAND_FILTER; | |
992 | ||
993 | spin_unlock_irqrestore(&priv->lock, flags); | |
994 | ||
995 | data->beacon_count++; | |
996 | ||
997 | data->chain_noise_a = (chain_noise_a + data->chain_noise_a); | |
998 | data->chain_noise_b = (chain_noise_b + data->chain_noise_b); | |
999 | data->chain_noise_c = (chain_noise_c + data->chain_noise_c); | |
1000 | ||
1001 | data->chain_signal_a = (chain_sig_a + data->chain_signal_a); | |
1002 | data->chain_signal_b = (chain_sig_b + data->chain_signal_b); | |
1003 | data->chain_signal_c = (chain_sig_c + data->chain_signal_c); | |
1004 | ||
e1623446 | 1005 | IWL_DEBUG_CALIB(priv, "chan=%d, band24=%d, beacon=%d\n", |
f0832f13 | 1006 | rxon_chnum, rxon_band24, data->beacon_count); |
e1623446 | 1007 | IWL_DEBUG_CALIB(priv, "chain_sig: a %d b %d c %d\n", |
f0832f13 | 1008 | chain_sig_a, chain_sig_b, chain_sig_c); |
e1623446 | 1009 | IWL_DEBUG_CALIB(priv, "chain_noise: a %d b %d c %d\n", |
f0832f13 EG |
1010 | chain_noise_a, chain_noise_b, chain_noise_c); |
1011 | ||
d8c07e7a | 1012 | /* If this is the "chain_noise_num_beacons", determine: |
f0832f13 EG |
1013 | * 1) Disconnected antennas (using signal strengths) |
1014 | * 2) Differential gain (using silence noise) to balance receivers */ | |
7cb1b088 WYG |
1015 | if (data->beacon_count != |
1016 | priv->cfg->base_params->chain_noise_num_beacons) | |
f0832f13 EG |
1017 | return; |
1018 | ||
1019 | /* Analyze signal for disconnected antenna */ | |
6fe8efb2 SZ |
1020 | if (priv->cfg->bt_params && |
1021 | priv->cfg->bt_params->advanced_bt_coexist) { | |
1022 | /* Disable disconnected antenna algorithm for advanced | |
1023 | bt coex, assuming valid antennas are connected */ | |
1024 | data->active_chains = priv->hw_params.valid_rx_ant; | |
1025 | for (i = 0; i < NUM_RX_CHAINS; i++) | |
1026 | if (!(data->active_chains & (1<<i))) | |
1027 | data->disconn_array[i] = 1; | |
1028 | } else | |
1029 | iwl_find_disconn_antenna(priv, average_sig, data); | |
f0832f13 | 1030 | |
f0832f13 | 1031 | /* Analyze noise for rx balance */ |
7cb1b088 WYG |
1032 | average_noise[0] = data->chain_noise_a / |
1033 | priv->cfg->base_params->chain_noise_num_beacons; | |
1034 | average_noise[1] = data->chain_noise_b / | |
1035 | priv->cfg->base_params->chain_noise_num_beacons; | |
1036 | average_noise[2] = data->chain_noise_c / | |
1037 | priv->cfg->base_params->chain_noise_num_beacons; | |
f0832f13 EG |
1038 | |
1039 | for (i = 0; i < NUM_RX_CHAINS; i++) { | |
1040 | if (!(data->disconn_array[i]) && | |
1041 | (average_noise[i] <= min_average_noise)) { | |
1042 | /* This means that chain i is active and has | |
1043 | * lower noise values so far: */ | |
1044 | min_average_noise = average_noise[i]; | |
1045 | min_average_noise_antenna_i = i; | |
1046 | } | |
1047 | } | |
1048 | ||
e1623446 | 1049 | IWL_DEBUG_CALIB(priv, "average_noise: a %d b %d c %d\n", |
f0832f13 EG |
1050 | average_noise[0], average_noise[1], |
1051 | average_noise[2]); | |
1052 | ||
e1623446 | 1053 | IWL_DEBUG_CALIB(priv, "min_average_noise = %d, antenna %d\n", |
f0832f13 EG |
1054 | min_average_noise, min_average_noise_antenna_i); |
1055 | ||
5c3d29fc | 1056 | iwlagn_gain_computation(priv, average_noise, |
d8c07e7a WYG |
1057 | min_average_noise_antenna_i, min_average_noise, |
1058 | find_first_chain(priv->cfg->valid_rx_ant)); | |
04816448 GE |
1059 | |
1060 | /* Some power changes may have been made during the calibration. | |
1061 | * Update and commit the RXON | |
1062 | */ | |
6b6db91c | 1063 | iwl_update_chain_flags(priv); |
04816448 GE |
1064 | |
1065 | data->state = IWL_CHAIN_NOISE_DONE; | |
e312c24c | 1066 | iwl_power_update_mode(priv, false); |
f0832f13 | 1067 | } |
4a4a9e81 TW |
1068 | |
1069 | void iwl_reset_run_time_calib(struct iwl_priv *priv) | |
1070 | { | |
1071 | int i; | |
1072 | memset(&(priv->sensitivity_data), 0, | |
1073 | sizeof(struct iwl_sensitivity_data)); | |
1074 | memset(&(priv->chain_noise_data), 0, | |
1075 | sizeof(struct iwl_chain_noise_data)); | |
1076 | for (i = 0; i < NUM_RX_CHAINS; i++) | |
1077 | priv->chain_noise_data.delta_gain_code[i] = | |
1078 | CHAIN_NOISE_DELTA_GAIN_INIT_VAL; | |
1079 | ||
1080 | /* Ask for statistics now, the uCode will send notification | |
1081 | * periodically after association */ | |
ef8d5529 | 1082 | iwl_send_statistics_request(priv, CMD_ASYNC, true); |
4a4a9e81 | 1083 | } |