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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 | 86 | { |
6e21f2c1 TW |
87 | struct iwl_host_cmd hcmd = { |
88 | .id = REPLY_PHY_CALIBRATION_CMD, | |
e419d62d | 89 | .flags = CMD_SYNC, |
6e21f2c1 | 90 | }; |
f02c2fd3 | 91 | struct iwl_calib_result *res; |
6e21f2c1 | 92 | |
f02c2fd3 | 93 | list_for_each_entry(res, &priv->calib_results, list) { |
93b64105 JB |
94 | int ret; |
95 | ||
f02c2fd3 JB |
96 | hcmd.len[0] = res->cmd_len; |
97 | hcmd.data[0] = &res->hdr; | |
93b64105 JB |
98 | hcmd.dataflags[0] = IWL_HCMD_DFL_NOCOPY; |
99 | ret = iwl_trans_send_cmd(trans(priv), &hcmd); | |
100 | if (ret) { | |
f02c2fd3 JB |
101 | IWL_ERR(priv, "Error %d on calib cmd %d\n", |
102 | ret, res->hdr.op_code); | |
93b64105 | 103 | return ret; |
6e21f2c1 | 104 | } |
be5d56ed | 105 | } |
6e21f2c1 | 106 | |
93b64105 | 107 | return 0; |
6e21f2c1 | 108 | } |
6e21f2c1 | 109 | |
f02c2fd3 JB |
110 | int iwl_calib_set(struct iwl_priv *priv, |
111 | const struct iwl_calib_hdr *cmd, int len) | |
6e21f2c1 | 112 | { |
f02c2fd3 JB |
113 | struct iwl_calib_result *res, *tmp; |
114 | ||
115 | res = kmalloc(sizeof(*res) + len - sizeof(struct iwl_calib_hdr), | |
116 | GFP_ATOMIC); | |
117 | if (!res) | |
6e21f2c1 | 118 | return -ENOMEM; |
f02c2fd3 JB |
119 | memcpy(&res->hdr, cmd, len); |
120 | res->cmd_len = len; | |
121 | ||
122 | list_for_each_entry(tmp, &priv->calib_results, list) { | |
123 | if (tmp->hdr.op_code == res->hdr.op_code) { | |
124 | list_replace(&tmp->list, &res->list); | |
125 | kfree(tmp); | |
126 | return 0; | |
127 | } | |
128 | } | |
129 | ||
130 | /* wasn't in list already */ | |
131 | list_add_tail(&res->list, &priv->calib_results); | |
6e21f2c1 | 132 | |
6e21f2c1 TW |
133 | return 0; |
134 | } | |
6e21f2c1 TW |
135 | |
136 | void iwl_calib_free_results(struct iwl_priv *priv) | |
137 | { | |
f02c2fd3 | 138 | struct iwl_calib_result *res, *tmp; |
6e21f2c1 | 139 | |
f02c2fd3 JB |
140 | list_for_each_entry_safe(res, tmp, &priv->calib_results, list) { |
141 | list_del(&res->list); | |
142 | kfree(res); | |
6e21f2c1 TW |
143 | } |
144 | } | |
145 | ||
146 | /***************************************************************************** | |
147 | * RUNTIME calibrations framework | |
148 | *****************************************************************************/ | |
149 | ||
f0832f13 EG |
150 | /* "false alarms" are signals that our DSP tries to lock onto, |
151 | * but then determines that they are either noise, or transmissions | |
152 | * from a distant wireless network (also "noise", really) that get | |
153 | * "stepped on" by stronger transmissions within our own network. | |
154 | * This algorithm attempts to set a sensitivity level that is high | |
155 | * enough to receive all of our own network traffic, but not so | |
156 | * high that our DSP gets too busy trying to lock onto non-network | |
157 | * activity/noise. */ | |
158 | static int iwl_sens_energy_cck(struct iwl_priv *priv, | |
159 | u32 norm_fa, | |
160 | u32 rx_enable_time, | |
161 | struct statistics_general_data *rx_info) | |
162 | { | |
163 | u32 max_nrg_cck = 0; | |
164 | int i = 0; | |
165 | u8 max_silence_rssi = 0; | |
166 | u32 silence_ref = 0; | |
167 | u8 silence_rssi_a = 0; | |
168 | u8 silence_rssi_b = 0; | |
169 | u8 silence_rssi_c = 0; | |
170 | u32 val; | |
171 | ||
172 | /* "false_alarms" values below are cross-multiplications to assess the | |
173 | * numbers of false alarms within the measured period of actual Rx | |
174 | * (Rx is off when we're txing), vs the min/max expected false alarms | |
175 | * (some should be expected if rx is sensitive enough) in a | |
176 | * hypothetical listening period of 200 time units (TU), 204.8 msec: | |
177 | * | |
178 | * MIN_FA/fixed-time < false_alarms/actual-rx-time < MAX_FA/beacon-time | |
179 | * | |
180 | * */ | |
181 | u32 false_alarms = norm_fa * 200 * 1024; | |
182 | u32 max_false_alarms = MAX_FA_CCK * rx_enable_time; | |
183 | u32 min_false_alarms = MIN_FA_CCK * rx_enable_time; | |
184 | struct iwl_sensitivity_data *data = NULL; | |
d6189124 | 185 | const struct iwl_sensitivity_ranges *ranges = hw_params(priv).sens; |
f0832f13 EG |
186 | |
187 | data = &(priv->sensitivity_data); | |
188 | ||
189 | data->nrg_auto_corr_silence_diff = 0; | |
190 | ||
191 | /* Find max silence rssi among all 3 receivers. | |
192 | * This is background noise, which may include transmissions from other | |
193 | * networks, measured during silence before our network's beacon */ | |
194 | silence_rssi_a = (u8)((rx_info->beacon_silence_rssi_a & | |
195 | ALL_BAND_FILTER) >> 8); | |
196 | silence_rssi_b = (u8)((rx_info->beacon_silence_rssi_b & | |
197 | ALL_BAND_FILTER) >> 8); | |
198 | silence_rssi_c = (u8)((rx_info->beacon_silence_rssi_c & | |
199 | ALL_BAND_FILTER) >> 8); | |
200 | ||
201 | val = max(silence_rssi_b, silence_rssi_c); | |
202 | max_silence_rssi = max(silence_rssi_a, (u8) val); | |
203 | ||
204 | /* Store silence rssi in 20-beacon history table */ | |
205 | data->nrg_silence_rssi[data->nrg_silence_idx] = max_silence_rssi; | |
206 | data->nrg_silence_idx++; | |
207 | if (data->nrg_silence_idx >= NRG_NUM_PREV_STAT_L) | |
208 | data->nrg_silence_idx = 0; | |
209 | ||
210 | /* Find max silence rssi across 20 beacon history */ | |
211 | for (i = 0; i < NRG_NUM_PREV_STAT_L; i++) { | |
212 | val = data->nrg_silence_rssi[i]; | |
213 | silence_ref = max(silence_ref, val); | |
214 | } | |
e1623446 | 215 | IWL_DEBUG_CALIB(priv, "silence a %u, b %u, c %u, 20-bcn max %u\n", |
f0832f13 EG |
216 | silence_rssi_a, silence_rssi_b, silence_rssi_c, |
217 | silence_ref); | |
218 | ||
219 | /* Find max rx energy (min value!) among all 3 receivers, | |
220 | * measured during beacon frame. | |
221 | * Save it in 10-beacon history table. */ | |
222 | i = data->nrg_energy_idx; | |
223 | val = min(rx_info->beacon_energy_b, rx_info->beacon_energy_c); | |
224 | data->nrg_value[i] = min(rx_info->beacon_energy_a, val); | |
225 | ||
226 | data->nrg_energy_idx++; | |
227 | if (data->nrg_energy_idx >= 10) | |
228 | data->nrg_energy_idx = 0; | |
229 | ||
230 | /* Find min rx energy (max value) across 10 beacon history. | |
231 | * This is the minimum signal level that we want to receive well. | |
232 | * Add backoff (margin so we don't miss slightly lower energy frames). | |
233 | * This establishes an upper bound (min value) for energy threshold. */ | |
234 | max_nrg_cck = data->nrg_value[0]; | |
235 | for (i = 1; i < 10; i++) | |
236 | max_nrg_cck = (u32) max(max_nrg_cck, (data->nrg_value[i])); | |
237 | max_nrg_cck += 6; | |
238 | ||
e1623446 | 239 | IWL_DEBUG_CALIB(priv, "rx energy a %u, b %u, c %u, 10-bcn max/min %u\n", |
f0832f13 EG |
240 | rx_info->beacon_energy_a, rx_info->beacon_energy_b, |
241 | rx_info->beacon_energy_c, max_nrg_cck - 6); | |
242 | ||
243 | /* Count number of consecutive beacons with fewer-than-desired | |
244 | * false alarms. */ | |
245 | if (false_alarms < min_false_alarms) | |
246 | data->num_in_cck_no_fa++; | |
247 | else | |
248 | data->num_in_cck_no_fa = 0; | |
e1623446 | 249 | IWL_DEBUG_CALIB(priv, "consecutive bcns with few false alarms = %u\n", |
f0832f13 EG |
250 | data->num_in_cck_no_fa); |
251 | ||
252 | /* If we got too many false alarms this time, reduce sensitivity */ | |
253 | if ((false_alarms > max_false_alarms) && | |
254 | (data->auto_corr_cck > AUTO_CORR_MAX_TH_CCK)) { | |
e1623446 | 255 | IWL_DEBUG_CALIB(priv, "norm FA %u > max FA %u\n", |
f0832f13 | 256 | false_alarms, max_false_alarms); |
e1623446 | 257 | IWL_DEBUG_CALIB(priv, "... reducing sensitivity\n"); |
f0832f13 EG |
258 | data->nrg_curr_state = IWL_FA_TOO_MANY; |
259 | /* Store for "fewer than desired" on later beacon */ | |
260 | data->nrg_silence_ref = silence_ref; | |
261 | ||
262 | /* increase energy threshold (reduce nrg value) | |
263 | * to decrease sensitivity */ | |
fe6efb4b | 264 | data->nrg_th_cck = data->nrg_th_cck - NRG_STEP_CCK; |
f0832f13 EG |
265 | /* Else if we got fewer than desired, increase sensitivity */ |
266 | } else if (false_alarms < min_false_alarms) { | |
267 | data->nrg_curr_state = IWL_FA_TOO_FEW; | |
268 | ||
269 | /* Compare silence level with silence level for most recent | |
270 | * healthy number or too many false alarms */ | |
271 | data->nrg_auto_corr_silence_diff = (s32)data->nrg_silence_ref - | |
272 | (s32)silence_ref; | |
273 | ||
e1623446 | 274 | IWL_DEBUG_CALIB(priv, "norm FA %u < min FA %u, silence diff %d\n", |
f0832f13 EG |
275 | false_alarms, min_false_alarms, |
276 | data->nrg_auto_corr_silence_diff); | |
277 | ||
278 | /* Increase value to increase sensitivity, but only if: | |
279 | * 1a) previous beacon did *not* have *too many* false alarms | |
280 | * 1b) AND there's a significant difference in Rx levels | |
281 | * from a previous beacon with too many, or healthy # FAs | |
282 | * OR 2) We've seen a lot of beacons (100) with too few | |
283 | * false alarms */ | |
284 | if ((data->nrg_prev_state != IWL_FA_TOO_MANY) && | |
285 | ((data->nrg_auto_corr_silence_diff > NRG_DIFF) || | |
286 | (data->num_in_cck_no_fa > MAX_NUMBER_CCK_NO_FA))) { | |
287 | ||
e1623446 | 288 | IWL_DEBUG_CALIB(priv, "... increasing sensitivity\n"); |
f0832f13 EG |
289 | /* Increase nrg value to increase sensitivity */ |
290 | val = data->nrg_th_cck + NRG_STEP_CCK; | |
291 | data->nrg_th_cck = min((u32)ranges->min_nrg_cck, val); | |
292 | } else { | |
e1623446 | 293 | IWL_DEBUG_CALIB(priv, "... but not changing sensitivity\n"); |
f0832f13 EG |
294 | } |
295 | ||
296 | /* Else we got a healthy number of false alarms, keep status quo */ | |
297 | } else { | |
e1623446 | 298 | IWL_DEBUG_CALIB(priv, " FA in safe zone\n"); |
f0832f13 EG |
299 | data->nrg_curr_state = IWL_FA_GOOD_RANGE; |
300 | ||
301 | /* Store for use in "fewer than desired" with later beacon */ | |
302 | data->nrg_silence_ref = silence_ref; | |
303 | ||
304 | /* If previous beacon had too many false alarms, | |
305 | * give it some extra margin by reducing sensitivity again | |
306 | * (but don't go below measured energy of desired Rx) */ | |
307 | if (IWL_FA_TOO_MANY == data->nrg_prev_state) { | |
e1623446 | 308 | IWL_DEBUG_CALIB(priv, "... increasing margin\n"); |
f0832f13 EG |
309 | if (data->nrg_th_cck > (max_nrg_cck + NRG_MARGIN)) |
310 | data->nrg_th_cck -= NRG_MARGIN; | |
311 | else | |
312 | data->nrg_th_cck = max_nrg_cck; | |
313 | } | |
314 | } | |
315 | ||
316 | /* Make sure the energy threshold does not go above the measured | |
317 | * energy of the desired Rx signals (reduced by backoff margin), | |
318 | * or else we might start missing Rx frames. | |
319 | * Lower value is higher energy, so we use max()! | |
320 | */ | |
321 | data->nrg_th_cck = max(max_nrg_cck, data->nrg_th_cck); | |
e1623446 | 322 | IWL_DEBUG_CALIB(priv, "new nrg_th_cck %u\n", data->nrg_th_cck); |
f0832f13 EG |
323 | |
324 | data->nrg_prev_state = data->nrg_curr_state; | |
325 | ||
326 | /* Auto-correlation CCK algorithm */ | |
327 | if (false_alarms > min_false_alarms) { | |
328 | ||
329 | /* increase auto_corr values to decrease sensitivity | |
330 | * so the DSP won't be disturbed by the noise | |
331 | */ | |
332 | if (data->auto_corr_cck < AUTO_CORR_MAX_TH_CCK) | |
333 | data->auto_corr_cck = AUTO_CORR_MAX_TH_CCK + 1; | |
334 | else { | |
335 | val = data->auto_corr_cck + AUTO_CORR_STEP_CCK; | |
336 | data->auto_corr_cck = | |
337 | min((u32)ranges->auto_corr_max_cck, val); | |
338 | } | |
339 | val = data->auto_corr_cck_mrc + AUTO_CORR_STEP_CCK; | |
340 | data->auto_corr_cck_mrc = | |
341 | min((u32)ranges->auto_corr_max_cck_mrc, val); | |
342 | } else if ((false_alarms < min_false_alarms) && | |
343 | ((data->nrg_auto_corr_silence_diff > NRG_DIFF) || | |
344 | (data->num_in_cck_no_fa > MAX_NUMBER_CCK_NO_FA))) { | |
345 | ||
346 | /* Decrease auto_corr values to increase sensitivity */ | |
347 | val = data->auto_corr_cck - AUTO_CORR_STEP_CCK; | |
348 | data->auto_corr_cck = | |
349 | max((u32)ranges->auto_corr_min_cck, val); | |
350 | val = data->auto_corr_cck_mrc - AUTO_CORR_STEP_CCK; | |
351 | data->auto_corr_cck_mrc = | |
352 | max((u32)ranges->auto_corr_min_cck_mrc, val); | |
353 | } | |
354 | ||
355 | return 0; | |
356 | } | |
357 | ||
358 | ||
359 | static int iwl_sens_auto_corr_ofdm(struct iwl_priv *priv, | |
360 | u32 norm_fa, | |
361 | u32 rx_enable_time) | |
362 | { | |
363 | u32 val; | |
364 | u32 false_alarms = norm_fa * 200 * 1024; | |
365 | u32 max_false_alarms = MAX_FA_OFDM * rx_enable_time; | |
366 | u32 min_false_alarms = MIN_FA_OFDM * rx_enable_time; | |
367 | struct iwl_sensitivity_data *data = NULL; | |
d6189124 | 368 | const struct iwl_sensitivity_ranges *ranges = hw_params(priv).sens; |
f0832f13 EG |
369 | |
370 | data = &(priv->sensitivity_data); | |
371 | ||
372 | /* If we got too many false alarms this time, reduce sensitivity */ | |
373 | if (false_alarms > max_false_alarms) { | |
374 | ||
e1623446 | 375 | IWL_DEBUG_CALIB(priv, "norm FA %u > max FA %u)\n", |
f0832f13 EG |
376 | false_alarms, max_false_alarms); |
377 | ||
378 | val = data->auto_corr_ofdm + AUTO_CORR_STEP_OFDM; | |
379 | data->auto_corr_ofdm = | |
380 | min((u32)ranges->auto_corr_max_ofdm, val); | |
381 | ||
382 | val = data->auto_corr_ofdm_mrc + AUTO_CORR_STEP_OFDM; | |
383 | data->auto_corr_ofdm_mrc = | |
384 | min((u32)ranges->auto_corr_max_ofdm_mrc, val); | |
385 | ||
386 | val = data->auto_corr_ofdm_x1 + AUTO_CORR_STEP_OFDM; | |
387 | data->auto_corr_ofdm_x1 = | |
388 | min((u32)ranges->auto_corr_max_ofdm_x1, val); | |
389 | ||
390 | val = data->auto_corr_ofdm_mrc_x1 + AUTO_CORR_STEP_OFDM; | |
391 | data->auto_corr_ofdm_mrc_x1 = | |
392 | min((u32)ranges->auto_corr_max_ofdm_mrc_x1, val); | |
393 | } | |
394 | ||
395 | /* Else if we got fewer than desired, increase sensitivity */ | |
396 | else if (false_alarms < min_false_alarms) { | |
397 | ||
e1623446 | 398 | IWL_DEBUG_CALIB(priv, "norm FA %u < min FA %u\n", |
f0832f13 EG |
399 | false_alarms, min_false_alarms); |
400 | ||
401 | val = data->auto_corr_ofdm - AUTO_CORR_STEP_OFDM; | |
402 | data->auto_corr_ofdm = | |
403 | max((u32)ranges->auto_corr_min_ofdm, val); | |
404 | ||
405 | val = data->auto_corr_ofdm_mrc - AUTO_CORR_STEP_OFDM; | |
406 | data->auto_corr_ofdm_mrc = | |
407 | max((u32)ranges->auto_corr_min_ofdm_mrc, val); | |
408 | ||
409 | val = data->auto_corr_ofdm_x1 - AUTO_CORR_STEP_OFDM; | |
410 | data->auto_corr_ofdm_x1 = | |
411 | max((u32)ranges->auto_corr_min_ofdm_x1, val); | |
412 | ||
413 | val = data->auto_corr_ofdm_mrc_x1 - AUTO_CORR_STEP_OFDM; | |
414 | data->auto_corr_ofdm_mrc_x1 = | |
415 | max((u32)ranges->auto_corr_min_ofdm_mrc_x1, val); | |
416 | } else { | |
e1623446 | 417 | IWL_DEBUG_CALIB(priv, "min FA %u < norm FA %u < max FA %u OK\n", |
f0832f13 EG |
418 | min_false_alarms, false_alarms, max_false_alarms); |
419 | } | |
420 | return 0; | |
421 | } | |
422 | ||
c8312fac WYG |
423 | static void iwl_prepare_legacy_sensitivity_tbl(struct iwl_priv *priv, |
424 | struct iwl_sensitivity_data *data, | |
425 | __le16 *tbl) | |
f0832f13 | 426 | { |
c8312fac | 427 | tbl[HD_AUTO_CORR32_X4_TH_ADD_MIN_INDEX] = |
f0832f13 | 428 | cpu_to_le16((u16)data->auto_corr_ofdm); |
c8312fac | 429 | tbl[HD_AUTO_CORR32_X4_TH_ADD_MIN_MRC_INDEX] = |
f0832f13 | 430 | cpu_to_le16((u16)data->auto_corr_ofdm_mrc); |
c8312fac | 431 | tbl[HD_AUTO_CORR32_X1_TH_ADD_MIN_INDEX] = |
f0832f13 | 432 | cpu_to_le16((u16)data->auto_corr_ofdm_x1); |
c8312fac | 433 | tbl[HD_AUTO_CORR32_X1_TH_ADD_MIN_MRC_INDEX] = |
f0832f13 EG |
434 | cpu_to_le16((u16)data->auto_corr_ofdm_mrc_x1); |
435 | ||
c8312fac | 436 | tbl[HD_AUTO_CORR40_X4_TH_ADD_MIN_INDEX] = |
f0832f13 | 437 | cpu_to_le16((u16)data->auto_corr_cck); |
c8312fac | 438 | tbl[HD_AUTO_CORR40_X4_TH_ADD_MIN_MRC_INDEX] = |
f0832f13 EG |
439 | cpu_to_le16((u16)data->auto_corr_cck_mrc); |
440 | ||
c8312fac | 441 | tbl[HD_MIN_ENERGY_CCK_DET_INDEX] = |
f0832f13 | 442 | cpu_to_le16((u16)data->nrg_th_cck); |
c8312fac | 443 | tbl[HD_MIN_ENERGY_OFDM_DET_INDEX] = |
f0832f13 EG |
444 | cpu_to_le16((u16)data->nrg_th_ofdm); |
445 | ||
c8312fac | 446 | tbl[HD_BARKER_CORR_TH_ADD_MIN_INDEX] = |
55036d66 | 447 | cpu_to_le16(data->barker_corr_th_min); |
c8312fac | 448 | tbl[HD_BARKER_CORR_TH_ADD_MIN_MRC_INDEX] = |
55036d66 | 449 | cpu_to_le16(data->barker_corr_th_min_mrc); |
c8312fac | 450 | tbl[HD_OFDM_ENERGY_TH_IN_INDEX] = |
55036d66 | 451 | cpu_to_le16(data->nrg_th_cca); |
f0832f13 | 452 | |
e1623446 | 453 | IWL_DEBUG_CALIB(priv, "ofdm: ac %u mrc %u x1 %u mrc_x1 %u thresh %u\n", |
f0832f13 EG |
454 | data->auto_corr_ofdm, data->auto_corr_ofdm_mrc, |
455 | data->auto_corr_ofdm_x1, data->auto_corr_ofdm_mrc_x1, | |
456 | data->nrg_th_ofdm); | |
457 | ||
e1623446 | 458 | IWL_DEBUG_CALIB(priv, "cck: ac %u mrc %u thresh %u\n", |
f0832f13 EG |
459 | data->auto_corr_cck, data->auto_corr_cck_mrc, |
460 | data->nrg_th_cck); | |
c8312fac WYG |
461 | } |
462 | ||
463 | /* Prepare a SENSITIVITY_CMD, send to uCode if values have changed */ | |
464 | static int iwl_sensitivity_write(struct iwl_priv *priv) | |
465 | { | |
466 | struct iwl_sensitivity_cmd cmd; | |
467 | struct iwl_sensitivity_data *data = NULL; | |
468 | struct iwl_host_cmd cmd_out = { | |
469 | .id = SENSITIVITY_CMD, | |
3fa50738 | 470 | .len = { sizeof(struct iwl_sensitivity_cmd), }, |
c8312fac | 471 | .flags = CMD_ASYNC, |
3fa50738 | 472 | .data = { &cmd, }, |
c8312fac WYG |
473 | }; |
474 | ||
475 | data = &(priv->sensitivity_data); | |
476 | ||
477 | memset(&cmd, 0, sizeof(cmd)); | |
478 | ||
479 | iwl_prepare_legacy_sensitivity_tbl(priv, data, &cmd.table[0]); | |
f0832f13 EG |
480 | |
481 | /* Update uCode's "work" table, and copy it to DSP */ | |
482 | cmd.control = SENSITIVITY_CMD_CONTROL_WORK_TABLE; | |
483 | ||
484 | /* Don't send command to uCode if nothing has changed */ | |
485 | if (!memcmp(&cmd.table[0], &(priv->sensitivity_tbl[0]), | |
486 | sizeof(u16)*HD_TABLE_SIZE)) { | |
e1623446 | 487 | IWL_DEBUG_CALIB(priv, "No change in SENSITIVITY_CMD\n"); |
f0832f13 EG |
488 | return 0; |
489 | } | |
490 | ||
491 | /* Copy table for comparison next time */ | |
492 | memcpy(&(priv->sensitivity_tbl[0]), &(cmd.table[0]), | |
493 | sizeof(u16)*HD_TABLE_SIZE); | |
494 | ||
e6bb4c9c | 495 | return iwl_trans_send_cmd(trans(priv), &cmd_out); |
f0832f13 EG |
496 | } |
497 | ||
c8312fac WYG |
498 | /* Prepare a SENSITIVITY_CMD, send to uCode if values have changed */ |
499 | static int iwl_enhance_sensitivity_write(struct iwl_priv *priv) | |
500 | { | |
501 | struct iwl_enhance_sensitivity_cmd cmd; | |
502 | struct iwl_sensitivity_data *data = NULL; | |
503 | struct iwl_host_cmd cmd_out = { | |
504 | .id = SENSITIVITY_CMD, | |
3fa50738 | 505 | .len = { sizeof(struct iwl_enhance_sensitivity_cmd), }, |
c8312fac | 506 | .flags = CMD_ASYNC, |
3fa50738 | 507 | .data = { &cmd, }, |
c8312fac WYG |
508 | }; |
509 | ||
510 | data = &(priv->sensitivity_data); | |
511 | ||
512 | memset(&cmd, 0, sizeof(cmd)); | |
513 | ||
514 | iwl_prepare_legacy_sensitivity_tbl(priv, data, &cmd.enhance_table[0]); | |
515 | ||
ae7f9a74 WYG |
516 | if (priv->cfg->base_params->hd_v2) { |
517 | cmd.enhance_table[HD_INA_NON_SQUARE_DET_OFDM_INDEX] = | |
518 | HD_INA_NON_SQUARE_DET_OFDM_DATA_V2; | |
519 | cmd.enhance_table[HD_INA_NON_SQUARE_DET_CCK_INDEX] = | |
520 | HD_INA_NON_SQUARE_DET_CCK_DATA_V2; | |
521 | cmd.enhance_table[HD_CORR_11_INSTEAD_OF_CORR_9_EN_INDEX] = | |
522 | HD_CORR_11_INSTEAD_OF_CORR_9_EN_DATA_V2; | |
523 | cmd.enhance_table[HD_OFDM_NON_SQUARE_DET_SLOPE_MRC_INDEX] = | |
524 | HD_OFDM_NON_SQUARE_DET_SLOPE_MRC_DATA_V2; | |
525 | cmd.enhance_table[HD_OFDM_NON_SQUARE_DET_INTERCEPT_MRC_INDEX] = | |
526 | HD_OFDM_NON_SQUARE_DET_INTERCEPT_MRC_DATA_V2; | |
527 | cmd.enhance_table[HD_OFDM_NON_SQUARE_DET_SLOPE_INDEX] = | |
528 | HD_OFDM_NON_SQUARE_DET_SLOPE_DATA_V2; | |
529 | cmd.enhance_table[HD_OFDM_NON_SQUARE_DET_INTERCEPT_INDEX] = | |
530 | HD_OFDM_NON_SQUARE_DET_INTERCEPT_DATA_V2; | |
531 | cmd.enhance_table[HD_CCK_NON_SQUARE_DET_SLOPE_MRC_INDEX] = | |
532 | HD_CCK_NON_SQUARE_DET_SLOPE_MRC_DATA_V2; | |
533 | cmd.enhance_table[HD_CCK_NON_SQUARE_DET_INTERCEPT_MRC_INDEX] = | |
534 | HD_CCK_NON_SQUARE_DET_INTERCEPT_MRC_DATA_V2; | |
535 | cmd.enhance_table[HD_CCK_NON_SQUARE_DET_SLOPE_INDEX] = | |
536 | HD_CCK_NON_SQUARE_DET_SLOPE_DATA_V2; | |
537 | cmd.enhance_table[HD_CCK_NON_SQUARE_DET_INTERCEPT_INDEX] = | |
538 | HD_CCK_NON_SQUARE_DET_INTERCEPT_DATA_V2; | |
539 | } else { | |
540 | cmd.enhance_table[HD_INA_NON_SQUARE_DET_OFDM_INDEX] = | |
541 | HD_INA_NON_SQUARE_DET_OFDM_DATA_V1; | |
542 | cmd.enhance_table[HD_INA_NON_SQUARE_DET_CCK_INDEX] = | |
543 | HD_INA_NON_SQUARE_DET_CCK_DATA_V1; | |
544 | cmd.enhance_table[HD_CORR_11_INSTEAD_OF_CORR_9_EN_INDEX] = | |
545 | HD_CORR_11_INSTEAD_OF_CORR_9_EN_DATA_V1; | |
546 | cmd.enhance_table[HD_OFDM_NON_SQUARE_DET_SLOPE_MRC_INDEX] = | |
547 | HD_OFDM_NON_SQUARE_DET_SLOPE_MRC_DATA_V1; | |
548 | cmd.enhance_table[HD_OFDM_NON_SQUARE_DET_INTERCEPT_MRC_INDEX] = | |
549 | HD_OFDM_NON_SQUARE_DET_INTERCEPT_MRC_DATA_V1; | |
550 | cmd.enhance_table[HD_OFDM_NON_SQUARE_DET_SLOPE_INDEX] = | |
551 | HD_OFDM_NON_SQUARE_DET_SLOPE_DATA_V1; | |
552 | cmd.enhance_table[HD_OFDM_NON_SQUARE_DET_INTERCEPT_INDEX] = | |
553 | HD_OFDM_NON_SQUARE_DET_INTERCEPT_DATA_V1; | |
554 | cmd.enhance_table[HD_CCK_NON_SQUARE_DET_SLOPE_MRC_INDEX] = | |
555 | HD_CCK_NON_SQUARE_DET_SLOPE_MRC_DATA_V1; | |
556 | cmd.enhance_table[HD_CCK_NON_SQUARE_DET_INTERCEPT_MRC_INDEX] = | |
557 | HD_CCK_NON_SQUARE_DET_INTERCEPT_MRC_DATA_V1; | |
558 | cmd.enhance_table[HD_CCK_NON_SQUARE_DET_SLOPE_INDEX] = | |
559 | HD_CCK_NON_SQUARE_DET_SLOPE_DATA_V1; | |
560 | cmd.enhance_table[HD_CCK_NON_SQUARE_DET_INTERCEPT_INDEX] = | |
561 | HD_CCK_NON_SQUARE_DET_INTERCEPT_DATA_V1; | |
562 | } | |
c8312fac WYG |
563 | |
564 | /* Update uCode's "work" table, and copy it to DSP */ | |
565 | cmd.control = SENSITIVITY_CMD_CONTROL_WORK_TABLE; | |
566 | ||
567 | /* Don't send command to uCode if nothing has changed */ | |
568 | if (!memcmp(&cmd.enhance_table[0], &(priv->sensitivity_tbl[0]), | |
569 | sizeof(u16)*HD_TABLE_SIZE) && | |
570 | !memcmp(&cmd.enhance_table[HD_INA_NON_SQUARE_DET_OFDM_INDEX], | |
571 | &(priv->enhance_sensitivity_tbl[0]), | |
572 | sizeof(u16)*ENHANCE_HD_TABLE_ENTRIES)) { | |
573 | IWL_DEBUG_CALIB(priv, "No change in SENSITIVITY_CMD\n"); | |
574 | return 0; | |
575 | } | |
576 | ||
577 | /* Copy table for comparison next time */ | |
578 | memcpy(&(priv->sensitivity_tbl[0]), &(cmd.enhance_table[0]), | |
579 | sizeof(u16)*HD_TABLE_SIZE); | |
580 | memcpy(&(priv->enhance_sensitivity_tbl[0]), | |
581 | &(cmd.enhance_table[HD_INA_NON_SQUARE_DET_OFDM_INDEX]), | |
582 | sizeof(u16)*ENHANCE_HD_TABLE_ENTRIES); | |
583 | ||
e6bb4c9c | 584 | return iwl_trans_send_cmd(trans(priv), &cmd_out); |
c8312fac WYG |
585 | } |
586 | ||
f0832f13 EG |
587 | void iwl_init_sensitivity(struct iwl_priv *priv) |
588 | { | |
589 | int ret = 0; | |
590 | int i; | |
591 | struct iwl_sensitivity_data *data = NULL; | |
d6189124 | 592 | const struct iwl_sensitivity_ranges *ranges = hw_params(priv).sens; |
f0832f13 | 593 | |
445c2dff TW |
594 | if (priv->disable_sens_cal) |
595 | return; | |
596 | ||
e1623446 | 597 | IWL_DEBUG_CALIB(priv, "Start iwl_init_sensitivity\n"); |
f0832f13 EG |
598 | |
599 | /* Clear driver's sensitivity algo data */ | |
600 | data = &(priv->sensitivity_data); | |
601 | ||
602 | if (ranges == NULL) | |
f0832f13 EG |
603 | return; |
604 | ||
605 | memset(data, 0, sizeof(struct iwl_sensitivity_data)); | |
606 | ||
607 | data->num_in_cck_no_fa = 0; | |
608 | data->nrg_curr_state = IWL_FA_TOO_MANY; | |
609 | data->nrg_prev_state = IWL_FA_TOO_MANY; | |
610 | data->nrg_silence_ref = 0; | |
611 | data->nrg_silence_idx = 0; | |
612 | data->nrg_energy_idx = 0; | |
613 | ||
614 | for (i = 0; i < 10; i++) | |
615 | data->nrg_value[i] = 0; | |
616 | ||
617 | for (i = 0; i < NRG_NUM_PREV_STAT_L; i++) | |
618 | data->nrg_silence_rssi[i] = 0; | |
619 | ||
f3a2a424 | 620 | data->auto_corr_ofdm = ranges->auto_corr_min_ofdm; |
f0832f13 EG |
621 | data->auto_corr_ofdm_mrc = ranges->auto_corr_min_ofdm_mrc; |
622 | data->auto_corr_ofdm_x1 = ranges->auto_corr_min_ofdm_x1; | |
623 | data->auto_corr_ofdm_mrc_x1 = ranges->auto_corr_min_ofdm_mrc_x1; | |
624 | data->auto_corr_cck = AUTO_CORR_CCK_MIN_VAL_DEF; | |
625 | data->auto_corr_cck_mrc = ranges->auto_corr_min_cck_mrc; | |
626 | data->nrg_th_cck = ranges->nrg_th_cck; | |
627 | data->nrg_th_ofdm = ranges->nrg_th_ofdm; | |
55036d66 WYG |
628 | data->barker_corr_th_min = ranges->barker_corr_th_min; |
629 | data->barker_corr_th_min_mrc = ranges->barker_corr_th_min_mrc; | |
630 | data->nrg_th_cca = ranges->nrg_th_cca; | |
f0832f13 EG |
631 | |
632 | data->last_bad_plcp_cnt_ofdm = 0; | |
633 | data->last_fa_cnt_ofdm = 0; | |
634 | data->last_bad_plcp_cnt_cck = 0; | |
635 | data->last_fa_cnt_cck = 0; | |
636 | ||
c8312fac WYG |
637 | if (priv->enhance_sensitivity_table) |
638 | ret |= iwl_enhance_sensitivity_write(priv); | |
639 | else | |
640 | ret |= iwl_sensitivity_write(priv); | |
e1623446 | 641 | IWL_DEBUG_CALIB(priv, "<<return 0x%X\n", ret); |
f0832f13 | 642 | } |
f0832f13 | 643 | |
0da0e5bf | 644 | void iwl_sensitivity_calibration(struct iwl_priv *priv) |
f0832f13 EG |
645 | { |
646 | u32 rx_enable_time; | |
647 | u32 fa_cck; | |
648 | u32 fa_ofdm; | |
649 | u32 bad_plcp_cck; | |
650 | u32 bad_plcp_ofdm; | |
651 | u32 norm_fa_ofdm; | |
652 | u32 norm_fa_cck; | |
653 | struct iwl_sensitivity_data *data = NULL; | |
7980fba5 WYG |
654 | struct statistics_rx_non_phy *rx_info; |
655 | struct statistics_rx_phy *ofdm, *cck; | |
f0832f13 EG |
656 | unsigned long flags; |
657 | struct statistics_general_data statis; | |
658 | ||
445c2dff TW |
659 | if (priv->disable_sens_cal) |
660 | return; | |
661 | ||
f0832f13 EG |
662 | data = &(priv->sensitivity_data); |
663 | ||
246ed355 | 664 | if (!iwl_is_any_associated(priv)) { |
e1623446 | 665 | IWL_DEBUG_CALIB(priv, "<< - not associated\n"); |
f0832f13 EG |
666 | return; |
667 | } | |
668 | ||
10b15e6f | 669 | spin_lock_irqsave(&priv->shrd->lock, flags); |
0da0e5bf JB |
670 | rx_info = &priv->statistics.rx_non_phy; |
671 | ofdm = &priv->statistics.rx_ofdm; | |
672 | cck = &priv->statistics.rx_cck; | |
f0832f13 | 673 | if (rx_info->interference_data_flag != INTERFERENCE_DATA_AVAILABLE) { |
e1623446 | 674 | IWL_DEBUG_CALIB(priv, "<< invalid data.\n"); |
10b15e6f | 675 | spin_unlock_irqrestore(&priv->shrd->lock, flags); |
f0832f13 EG |
676 | return; |
677 | } | |
678 | ||
679 | /* Extract Statistics: */ | |
680 | rx_enable_time = le32_to_cpu(rx_info->channel_load); | |
7980fba5 WYG |
681 | fa_cck = le32_to_cpu(cck->false_alarm_cnt); |
682 | fa_ofdm = le32_to_cpu(ofdm->false_alarm_cnt); | |
683 | bad_plcp_cck = le32_to_cpu(cck->plcp_err); | |
684 | bad_plcp_ofdm = le32_to_cpu(ofdm->plcp_err); | |
f0832f13 EG |
685 | |
686 | statis.beacon_silence_rssi_a = | |
7980fba5 | 687 | le32_to_cpu(rx_info->beacon_silence_rssi_a); |
f0832f13 | 688 | statis.beacon_silence_rssi_b = |
7980fba5 | 689 | le32_to_cpu(rx_info->beacon_silence_rssi_b); |
f0832f13 | 690 | statis.beacon_silence_rssi_c = |
7980fba5 | 691 | le32_to_cpu(rx_info->beacon_silence_rssi_c); |
f0832f13 | 692 | statis.beacon_energy_a = |
7980fba5 | 693 | le32_to_cpu(rx_info->beacon_energy_a); |
f0832f13 | 694 | statis.beacon_energy_b = |
7980fba5 | 695 | le32_to_cpu(rx_info->beacon_energy_b); |
f0832f13 | 696 | statis.beacon_energy_c = |
7980fba5 | 697 | le32_to_cpu(rx_info->beacon_energy_c); |
f0832f13 | 698 | |
10b15e6f | 699 | spin_unlock_irqrestore(&priv->shrd->lock, flags); |
f0832f13 | 700 | |
e1623446 | 701 | IWL_DEBUG_CALIB(priv, "rx_enable_time = %u usecs\n", rx_enable_time); |
f0832f13 EG |
702 | |
703 | if (!rx_enable_time) { | |
91dd6c27 | 704 | IWL_DEBUG_CALIB(priv, "<< RX Enable Time == 0!\n"); |
f0832f13 EG |
705 | return; |
706 | } | |
707 | ||
708 | /* These statistics increase monotonically, and do not reset | |
709 | * at each beacon. Calculate difference from last value, or just | |
710 | * use the new statistics value if it has reset or wrapped around. */ | |
711 | if (data->last_bad_plcp_cnt_cck > bad_plcp_cck) | |
712 | data->last_bad_plcp_cnt_cck = bad_plcp_cck; | |
713 | else { | |
714 | bad_plcp_cck -= data->last_bad_plcp_cnt_cck; | |
715 | data->last_bad_plcp_cnt_cck += bad_plcp_cck; | |
716 | } | |
717 | ||
718 | if (data->last_bad_plcp_cnt_ofdm > bad_plcp_ofdm) | |
719 | data->last_bad_plcp_cnt_ofdm = bad_plcp_ofdm; | |
720 | else { | |
721 | bad_plcp_ofdm -= data->last_bad_plcp_cnt_ofdm; | |
722 | data->last_bad_plcp_cnt_ofdm += bad_plcp_ofdm; | |
723 | } | |
724 | ||
725 | if (data->last_fa_cnt_ofdm > fa_ofdm) | |
726 | data->last_fa_cnt_ofdm = fa_ofdm; | |
727 | else { | |
728 | fa_ofdm -= data->last_fa_cnt_ofdm; | |
729 | data->last_fa_cnt_ofdm += fa_ofdm; | |
730 | } | |
731 | ||
732 | if (data->last_fa_cnt_cck > fa_cck) | |
733 | data->last_fa_cnt_cck = fa_cck; | |
734 | else { | |
735 | fa_cck -= data->last_fa_cnt_cck; | |
736 | data->last_fa_cnt_cck += fa_cck; | |
737 | } | |
738 | ||
739 | /* Total aborted signal locks */ | |
740 | norm_fa_ofdm = fa_ofdm + bad_plcp_ofdm; | |
741 | norm_fa_cck = fa_cck + bad_plcp_cck; | |
742 | ||
e1623446 | 743 | IWL_DEBUG_CALIB(priv, "cck: fa %u badp %u ofdm: fa %u badp %u\n", fa_cck, |
f0832f13 EG |
744 | bad_plcp_cck, fa_ofdm, bad_plcp_ofdm); |
745 | ||
746 | iwl_sens_auto_corr_ofdm(priv, norm_fa_ofdm, rx_enable_time); | |
747 | iwl_sens_energy_cck(priv, norm_fa_cck, rx_enable_time, &statis); | |
c8312fac WYG |
748 | if (priv->enhance_sensitivity_table) |
749 | iwl_enhance_sensitivity_write(priv); | |
750 | else | |
751 | iwl_sensitivity_write(priv); | |
f0832f13 | 752 | } |
f0832f13 | 753 | |
d8c07e7a WYG |
754 | static inline u8 find_first_chain(u8 mask) |
755 | { | |
756 | if (mask & ANT_A) | |
757 | return CHAIN_A; | |
758 | if (mask & ANT_B) | |
759 | return CHAIN_B; | |
760 | return CHAIN_C; | |
761 | } | |
762 | ||
3031242b SZ |
763 | /** |
764 | * Run disconnected antenna algorithm to find out which antennas are | |
765 | * disconnected. | |
766 | */ | |
767 | static void iwl_find_disconn_antenna(struct iwl_priv *priv, u32* average_sig, | |
768 | struct iwl_chain_noise_data *data) | |
769 | { | |
770 | u32 active_chains = 0; | |
771 | u32 max_average_sig; | |
772 | u16 max_average_sig_antenna_i; | |
773 | u8 num_tx_chains; | |
774 | u8 first_chain; | |
775 | u16 i = 0; | |
776 | ||
b8c2b05e FD |
777 | average_sig[0] = data->chain_signal_a / IWL_CAL_NUM_BEACONS; |
778 | average_sig[1] = data->chain_signal_b / IWL_CAL_NUM_BEACONS; | |
779 | average_sig[2] = data->chain_signal_c / IWL_CAL_NUM_BEACONS; | |
3031242b SZ |
780 | |
781 | if (average_sig[0] >= average_sig[1]) { | |
782 | max_average_sig = average_sig[0]; | |
783 | max_average_sig_antenna_i = 0; | |
784 | active_chains = (1 << max_average_sig_antenna_i); | |
785 | } else { | |
786 | max_average_sig = average_sig[1]; | |
787 | max_average_sig_antenna_i = 1; | |
788 | active_chains = (1 << max_average_sig_antenna_i); | |
789 | } | |
790 | ||
791 | if (average_sig[2] >= max_average_sig) { | |
792 | max_average_sig = average_sig[2]; | |
793 | max_average_sig_antenna_i = 2; | |
794 | active_chains = (1 << max_average_sig_antenna_i); | |
795 | } | |
796 | ||
797 | IWL_DEBUG_CALIB(priv, "average_sig: a %d b %d c %d\n", | |
798 | average_sig[0], average_sig[1], average_sig[2]); | |
799 | IWL_DEBUG_CALIB(priv, "max_average_sig = %d, antenna %d\n", | |
800 | max_average_sig, max_average_sig_antenna_i); | |
801 | ||
802 | /* Compare signal strengths for all 3 receivers. */ | |
803 | for (i = 0; i < NUM_RX_CHAINS; i++) { | |
804 | if (i != max_average_sig_antenna_i) { | |
805 | s32 rssi_delta = (max_average_sig - average_sig[i]); | |
806 | ||
807 | /* If signal is very weak, compared with | |
808 | * strongest, mark it as disconnected. */ | |
809 | if (rssi_delta > MAXIMUM_ALLOWED_PATHLOSS) | |
810 | data->disconn_array[i] = 1; | |
811 | else | |
812 | active_chains |= (1 << i); | |
813 | IWL_DEBUG_CALIB(priv, "i = %d rssiDelta = %d " | |
814 | "disconn_array[i] = %d\n", | |
815 | i, rssi_delta, data->disconn_array[i]); | |
816 | } | |
817 | } | |
818 | ||
819 | /* | |
820 | * The above algorithm sometimes fails when the ucode | |
821 | * reports 0 for all chains. It's not clear why that | |
822 | * happens to start with, but it is then causing trouble | |
823 | * because this can make us enable more chains than the | |
824 | * hardware really has. | |
825 | * | |
826 | * To be safe, simply mask out any chains that we know | |
827 | * are not on the device. | |
828 | */ | |
d6189124 | 829 | active_chains &= hw_params(priv).valid_rx_ant; |
3031242b SZ |
830 | |
831 | num_tx_chains = 0; | |
832 | for (i = 0; i < NUM_RX_CHAINS; i++) { | |
833 | /* loops on all the bits of | |
834 | * priv->hw_setting.valid_tx_ant */ | |
835 | u8 ant_msk = (1 << i); | |
d6189124 | 836 | if (!(hw_params(priv).valid_tx_ant & ant_msk)) |
3031242b SZ |
837 | continue; |
838 | ||
839 | num_tx_chains++; | |
840 | if (data->disconn_array[i] == 0) | |
841 | /* there is a Tx antenna connected */ | |
842 | break; | |
d6189124 | 843 | if (num_tx_chains == hw_params(priv).tx_chains_num && |
3031242b SZ |
844 | data->disconn_array[i]) { |
845 | /* | |
846 | * If all chains are disconnected | |
847 | * connect the first valid tx chain | |
848 | */ | |
849 | first_chain = | |
850 | find_first_chain(priv->cfg->valid_tx_ant); | |
851 | data->disconn_array[first_chain] = 0; | |
852 | active_chains |= BIT(first_chain); | |
85ee7a1d JP |
853 | IWL_DEBUG_CALIB(priv, |
854 | "All Tx chains are disconnected W/A - declare %d as connected\n", | |
3031242b SZ |
855 | first_chain); |
856 | break; | |
857 | } | |
858 | } | |
859 | ||
d6189124 | 860 | if (active_chains != hw_params(priv).valid_rx_ant && |
3031242b SZ |
861 | active_chains != priv->chain_noise_data.active_chains) |
862 | IWL_DEBUG_CALIB(priv, | |
863 | "Detected that not all antennas are connected! " | |
864 | "Connected: %#x, valid: %#x.\n", | |
d6189124 EG |
865 | active_chains, |
866 | hw_params(priv).valid_rx_ant); | |
3031242b SZ |
867 | |
868 | /* Save for use within RXON, TX, SCAN commands, etc. */ | |
869 | data->active_chains = active_chains; | |
870 | IWL_DEBUG_CALIB(priv, "active_chains (bitwise) = 0x%x\n", | |
871 | active_chains); | |
872 | } | |
873 | ||
e505c433 WYG |
874 | static void iwlagn_gain_computation(struct iwl_priv *priv, |
875 | u32 average_noise[NUM_RX_CHAINS], | |
876 | u16 min_average_noise_antenna_i, | |
877 | u32 min_average_noise, | |
878 | u8 default_chain) | |
879 | { | |
880 | int i; | |
881 | s32 delta_g; | |
882 | struct iwl_chain_noise_data *data = &priv->chain_noise_data; | |
883 | ||
884 | /* | |
885 | * Find Gain Code for the chains based on "default chain" | |
886 | */ | |
887 | for (i = default_chain + 1; i < NUM_RX_CHAINS; i++) { | |
888 | if ((data->disconn_array[i])) { | |
889 | data->delta_gain_code[i] = 0; | |
890 | continue; | |
891 | } | |
892 | ||
893 | delta_g = (priv->cfg->base_params->chain_noise_scale * | |
894 | ((s32)average_noise[default_chain] - | |
895 | (s32)average_noise[i])) / 1500; | |
896 | ||
897 | /* bound gain by 2 bits value max, 3rd bit is sign */ | |
898 | data->delta_gain_code[i] = | |
899 | min(abs(delta_g), | |
900 | (long) CHAIN_NOISE_MAX_DELTA_GAIN_CODE); | |
901 | ||
902 | if (delta_g < 0) | |
903 | /* | |
904 | * set negative sign ... | |
905 | * note to Intel developers: This is uCode API format, | |
906 | * not the format of any internal device registers. | |
907 | * Do not change this format for e.g. 6050 or similar | |
908 | * devices. Change format only if more resolution | |
909 | * (i.e. more than 2 bits magnitude) is needed. | |
910 | */ | |
911 | data->delta_gain_code[i] |= (1 << 2); | |
912 | } | |
913 | ||
914 | IWL_DEBUG_CALIB(priv, "Delta gains: ANT_B = %d ANT_C = %d\n", | |
915 | data->delta_gain_code[1], data->delta_gain_code[2]); | |
916 | ||
917 | if (!data->radio_write) { | |
918 | struct iwl_calib_chain_noise_gain_cmd cmd; | |
919 | ||
920 | memset(&cmd, 0, sizeof(cmd)); | |
921 | ||
922 | iwl_set_calib_hdr(&cmd.hdr, | |
898ed67b | 923 | priv->phy_calib_chain_noise_gain_cmd); |
e505c433 WYG |
924 | cmd.delta_gain_1 = data->delta_gain_code[1]; |
925 | cmd.delta_gain_2 = data->delta_gain_code[2]; | |
e6bb4c9c | 926 | iwl_trans_send_cmd_pdu(trans(priv), REPLY_PHY_CALIBRATION_CMD, |
e505c433 WYG |
927 | CMD_ASYNC, sizeof(cmd), &cmd); |
928 | ||
929 | data->radio_write = 1; | |
930 | data->state = IWL_CHAIN_NOISE_CALIBRATED; | |
931 | } | |
932 | } | |
3031242b | 933 | |
f0832f13 | 934 | /* |
3031242b | 935 | * Accumulate 16 beacons of signal and noise statistics for each of |
f0832f13 EG |
936 | * 3 receivers/antennas/rx-chains, then figure out: |
937 | * 1) Which antennas are connected. | |
938 | * 2) Differential rx gain settings to balance the 3 receivers. | |
939 | */ | |
0da0e5bf | 940 | void iwl_chain_noise_calibration(struct iwl_priv *priv) |
f0832f13 EG |
941 | { |
942 | struct iwl_chain_noise_data *data = NULL; | |
943 | ||
944 | u32 chain_noise_a; | |
945 | u32 chain_noise_b; | |
946 | u32 chain_noise_c; | |
947 | u32 chain_sig_a; | |
948 | u32 chain_sig_b; | |
949 | u32 chain_sig_c; | |
950 | u32 average_sig[NUM_RX_CHAINS] = {INITIALIZATION_VALUE}; | |
951 | u32 average_noise[NUM_RX_CHAINS] = {INITIALIZATION_VALUE}; | |
f0832f13 EG |
952 | u32 min_average_noise = MIN_AVERAGE_NOISE_MAX_VALUE; |
953 | u16 min_average_noise_antenna_i = INITIALIZATION_VALUE; | |
954 | u16 i = 0; | |
955 | u16 rxon_chnum = INITIALIZATION_VALUE; | |
956 | u16 stat_chnum = INITIALIZATION_VALUE; | |
957 | u8 rxon_band24; | |
958 | u8 stat_band24; | |
f0832f13 | 959 | unsigned long flags; |
7980fba5 | 960 | struct statistics_rx_non_phy *rx_info; |
3031242b | 961 | |
246ed355 JB |
962 | /* |
963 | * MULTI-FIXME: | |
964 | * When we support multiple interfaces on different channels, | |
965 | * this must be modified/fixed. | |
966 | */ | |
967 | struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS]; | |
f0832f13 | 968 | |
445c2dff TW |
969 | if (priv->disable_chain_noise_cal) |
970 | return; | |
971 | ||
f0832f13 EG |
972 | data = &(priv->chain_noise_data); |
973 | ||
d8c07e7a WYG |
974 | /* |
975 | * Accumulate just the first "chain_noise_num_beacons" after | |
976 | * the first association, then we're done forever. | |
977 | */ | |
f0832f13 EG |
978 | if (data->state != IWL_CHAIN_NOISE_ACCUMULATE) { |
979 | if (data->state == IWL_CHAIN_NOISE_ALIVE) | |
e1623446 | 980 | IWL_DEBUG_CALIB(priv, "Wait for noise calib reset\n"); |
f0832f13 EG |
981 | return; |
982 | } | |
983 | ||
10b15e6f | 984 | spin_lock_irqsave(&priv->shrd->lock, flags); |
0da0e5bf JB |
985 | |
986 | rx_info = &priv->statistics.rx_non_phy; | |
987 | ||
f0832f13 | 988 | if (rx_info->interference_data_flag != INTERFERENCE_DATA_AVAILABLE) { |
e1623446 | 989 | IWL_DEBUG_CALIB(priv, " << Interference data unavailable\n"); |
10b15e6f | 990 | spin_unlock_irqrestore(&priv->shrd->lock, flags); |
f0832f13 EG |
991 | return; |
992 | } | |
993 | ||
246ed355 JB |
994 | rxon_band24 = !!(ctx->staging.flags & RXON_FLG_BAND_24G_MSK); |
995 | rxon_chnum = le16_to_cpu(ctx->staging.channel); | |
0da0e5bf JB |
996 | stat_band24 = |
997 | !!(priv->statistics.flag & STATISTICS_REPLY_FLG_BAND_24G_MSK); | |
998 | stat_chnum = le32_to_cpu(priv->statistics.flag) >> 16; | |
f0832f13 EG |
999 | |
1000 | /* Make sure we accumulate data for just the associated channel | |
1001 | * (even if scanning). */ | |
1002 | if ((rxon_chnum != stat_chnum) || (rxon_band24 != stat_band24)) { | |
e1623446 | 1003 | IWL_DEBUG_CALIB(priv, "Stats not from chan=%d, band24=%d\n", |
f0832f13 | 1004 | rxon_chnum, rxon_band24); |
10b15e6f | 1005 | spin_unlock_irqrestore(&priv->shrd->lock, flags); |
f0832f13 EG |
1006 | return; |
1007 | } | |
1008 | ||
d8c07e7a WYG |
1009 | /* |
1010 | * Accumulate beacon statistics values across | |
1011 | * "chain_noise_num_beacons" | |
1012 | */ | |
f0832f13 EG |
1013 | chain_noise_a = le32_to_cpu(rx_info->beacon_silence_rssi_a) & |
1014 | IN_BAND_FILTER; | |
1015 | chain_noise_b = le32_to_cpu(rx_info->beacon_silence_rssi_b) & | |
1016 | IN_BAND_FILTER; | |
1017 | chain_noise_c = le32_to_cpu(rx_info->beacon_silence_rssi_c) & | |
1018 | IN_BAND_FILTER; | |
1019 | ||
1020 | chain_sig_a = le32_to_cpu(rx_info->beacon_rssi_a) & IN_BAND_FILTER; | |
1021 | chain_sig_b = le32_to_cpu(rx_info->beacon_rssi_b) & IN_BAND_FILTER; | |
1022 | chain_sig_c = le32_to_cpu(rx_info->beacon_rssi_c) & IN_BAND_FILTER; | |
1023 | ||
10b15e6f | 1024 | spin_unlock_irqrestore(&priv->shrd->lock, flags); |
f0832f13 EG |
1025 | |
1026 | data->beacon_count++; | |
1027 | ||
1028 | data->chain_noise_a = (chain_noise_a + data->chain_noise_a); | |
1029 | data->chain_noise_b = (chain_noise_b + data->chain_noise_b); | |
1030 | data->chain_noise_c = (chain_noise_c + data->chain_noise_c); | |
1031 | ||
1032 | data->chain_signal_a = (chain_sig_a + data->chain_signal_a); | |
1033 | data->chain_signal_b = (chain_sig_b + data->chain_signal_b); | |
1034 | data->chain_signal_c = (chain_sig_c + data->chain_signal_c); | |
1035 | ||
e1623446 | 1036 | IWL_DEBUG_CALIB(priv, "chan=%d, band24=%d, beacon=%d\n", |
f0832f13 | 1037 | rxon_chnum, rxon_band24, data->beacon_count); |
e1623446 | 1038 | IWL_DEBUG_CALIB(priv, "chain_sig: a %d b %d c %d\n", |
f0832f13 | 1039 | chain_sig_a, chain_sig_b, chain_sig_c); |
e1623446 | 1040 | IWL_DEBUG_CALIB(priv, "chain_noise: a %d b %d c %d\n", |
f0832f13 EG |
1041 | chain_noise_a, chain_noise_b, chain_noise_c); |
1042 | ||
d8c07e7a | 1043 | /* If this is the "chain_noise_num_beacons", determine: |
f0832f13 EG |
1044 | * 1) Disconnected antennas (using signal strengths) |
1045 | * 2) Differential gain (using silence noise) to balance receivers */ | |
b8c2b05e | 1046 | if (data->beacon_count != IWL_CAL_NUM_BEACONS) |
f0832f13 EG |
1047 | return; |
1048 | ||
1049 | /* Analyze signal for disconnected antenna */ | |
6fe8efb2 SZ |
1050 | if (priv->cfg->bt_params && |
1051 | priv->cfg->bt_params->advanced_bt_coexist) { | |
1052 | /* Disable disconnected antenna algorithm for advanced | |
1053 | bt coex, assuming valid antennas are connected */ | |
d6189124 | 1054 | data->active_chains = hw_params(priv).valid_rx_ant; |
6fe8efb2 SZ |
1055 | for (i = 0; i < NUM_RX_CHAINS; i++) |
1056 | if (!(data->active_chains & (1<<i))) | |
1057 | data->disconn_array[i] = 1; | |
1058 | } else | |
1059 | iwl_find_disconn_antenna(priv, average_sig, data); | |
f0832f13 | 1060 | |
f0832f13 | 1061 | /* Analyze noise for rx balance */ |
b8c2b05e FD |
1062 | average_noise[0] = data->chain_noise_a / IWL_CAL_NUM_BEACONS; |
1063 | average_noise[1] = data->chain_noise_b / IWL_CAL_NUM_BEACONS; | |
1064 | average_noise[2] = data->chain_noise_c / IWL_CAL_NUM_BEACONS; | |
f0832f13 EG |
1065 | |
1066 | for (i = 0; i < NUM_RX_CHAINS; i++) { | |
1067 | if (!(data->disconn_array[i]) && | |
1068 | (average_noise[i] <= min_average_noise)) { | |
1069 | /* This means that chain i is active and has | |
1070 | * lower noise values so far: */ | |
1071 | min_average_noise = average_noise[i]; | |
1072 | min_average_noise_antenna_i = i; | |
1073 | } | |
1074 | } | |
1075 | ||
e1623446 | 1076 | IWL_DEBUG_CALIB(priv, "average_noise: a %d b %d c %d\n", |
f0832f13 EG |
1077 | average_noise[0], average_noise[1], |
1078 | average_noise[2]); | |
1079 | ||
e1623446 | 1080 | IWL_DEBUG_CALIB(priv, "min_average_noise = %d, antenna %d\n", |
f0832f13 EG |
1081 | min_average_noise, min_average_noise_antenna_i); |
1082 | ||
5c3d29fc | 1083 | iwlagn_gain_computation(priv, average_noise, |
d8c07e7a WYG |
1084 | min_average_noise_antenna_i, min_average_noise, |
1085 | find_first_chain(priv->cfg->valid_rx_ant)); | |
04816448 GE |
1086 | |
1087 | /* Some power changes may have been made during the calibration. | |
1088 | * Update and commit the RXON | |
1089 | */ | |
6b6db91c | 1090 | iwl_update_chain_flags(priv); |
04816448 GE |
1091 | |
1092 | data->state = IWL_CHAIN_NOISE_DONE; | |
e312c24c | 1093 | iwl_power_update_mode(priv, false); |
f0832f13 | 1094 | } |
4a4a9e81 TW |
1095 | |
1096 | void iwl_reset_run_time_calib(struct iwl_priv *priv) | |
1097 | { | |
1098 | int i; | |
1099 | memset(&(priv->sensitivity_data), 0, | |
1100 | sizeof(struct iwl_sensitivity_data)); | |
1101 | memset(&(priv->chain_noise_data), 0, | |
1102 | sizeof(struct iwl_chain_noise_data)); | |
1103 | for (i = 0; i < NUM_RX_CHAINS; i++) | |
1104 | priv->chain_noise_data.delta_gain_code[i] = | |
1105 | CHAIN_NOISE_DELTA_GAIN_INIT_VAL; | |
1106 | ||
1107 | /* Ask for statistics now, the uCode will send notification | |
1108 | * periodically after association */ | |
ef8d5529 | 1109 | iwl_send_statistics_request(priv, CMD_ASYNC, true); |
4a4a9e81 | 1110 | } |