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f65c0825 SM |
1 | /* |
2 | * Copyright (c) 2013 Qualcomm Atheros, Inc. | |
3 | * | |
4 | * Permission to use, copy, modify, and/or distribute this software for any | |
5 | * purpose with or without fee is hereby granted, provided that the above | |
6 | * copyright notice and this permission notice appear in all copies. | |
7 | * | |
8 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES | |
9 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF | |
10 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR | |
11 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | |
12 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
13 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |
14 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
15 | */ | |
16 | ||
17 | #include <linux/relay.h> | |
2aa56cca | 18 | #include <linux/random.h> |
f65c0825 SM |
19 | #include "ath9k.h" |
20 | ||
21 | static s8 fix_rssi_inv_only(u8 rssi_val) | |
22 | { | |
23 | if (rssi_val == 128) | |
24 | rssi_val = 0; | |
25 | return (s8) rssi_val; | |
26 | } | |
27 | ||
1111d426 | 28 | static void ath_debug_send_fft_sample(struct ath_spec_scan_priv *spec_priv, |
f65c0825 SM |
29 | struct fft_sample_tlv *fft_sample_tlv) |
30 | { | |
31 | int length; | |
1111d426 | 32 | if (!spec_priv->rfs_chan_spec_scan) |
f65c0825 SM |
33 | return; |
34 | ||
35 | length = __be16_to_cpu(fft_sample_tlv->length) + | |
36 | sizeof(*fft_sample_tlv); | |
1111d426 | 37 | relay_write(spec_priv->rfs_chan_spec_scan, fft_sample_tlv, length); |
f65c0825 SM |
38 | } |
39 | ||
72dd2cda NK |
40 | typedef int (ath_cmn_fft_idx_validator) (u8 *sample_end, int bytes_read); |
41 | ||
42 | static int | |
43 | ath_cmn_max_idx_verify_ht20_fft(u8 *sample_end, int bytes_read) | |
44 | { | |
45 | struct ath_ht20_mag_info *mag_info; | |
46 | u8 *sample; | |
47 | u16 max_magnitude; | |
48 | u8 max_index; | |
49 | u8 max_exp; | |
50 | ||
51 | /* Sanity check so that we don't read outside the read | |
52 | * buffer | |
53 | */ | |
54 | if (bytes_read < SPECTRAL_HT20_SAMPLE_LEN - 1) | |
55 | return -1; | |
56 | ||
57 | mag_info = (struct ath_ht20_mag_info *) (sample_end - | |
58 | sizeof(struct ath_ht20_mag_info) + 1); | |
59 | ||
60 | sample = sample_end - SPECTRAL_HT20_SAMPLE_LEN + 1; | |
61 | ||
62 | max_index = spectral_max_index(mag_info->all_bins, | |
63 | SPECTRAL_HT20_NUM_BINS); | |
64 | max_magnitude = spectral_max_magnitude(mag_info->all_bins); | |
65 | ||
66 | max_exp = mag_info->max_exp & 0xf; | |
67 | ||
68 | /* Don't try to read something outside the read buffer | |
69 | * in case of a missing byte (so bins[0] will be outside | |
70 | * the read buffer) | |
71 | */ | |
72 | if (bytes_read < SPECTRAL_HT20_SAMPLE_LEN && max_index < 1) | |
73 | return -1; | |
74 | ||
75 | if (sample[max_index] != (max_magnitude >> max_exp)) | |
76 | return -1; | |
77 | else | |
78 | return 0; | |
79 | } | |
80 | ||
81 | static int | |
82 | ath_cmn_max_idx_verify_ht20_40_fft(u8 *sample_end, int bytes_read) | |
83 | { | |
84 | struct ath_ht20_40_mag_info *mag_info; | |
85 | u8 *sample; | |
86 | u16 lower_mag, upper_mag; | |
87 | u8 lower_max_index, upper_max_index; | |
88 | u8 max_exp; | |
89 | int dc_pos = SPECTRAL_HT20_40_NUM_BINS / 2; | |
90 | ||
91 | /* Sanity check so that we don't read outside the read | |
92 | * buffer | |
93 | */ | |
94 | if (bytes_read < SPECTRAL_HT20_40_SAMPLE_LEN - 1) | |
95 | return -1; | |
96 | ||
97 | mag_info = (struct ath_ht20_40_mag_info *) (sample_end - | |
98 | sizeof(struct ath_ht20_40_mag_info) + 1); | |
99 | ||
100 | sample = sample_end - SPECTRAL_HT20_40_SAMPLE_LEN + 1; | |
101 | ||
102 | lower_mag = spectral_max_magnitude(mag_info->lower_bins); | |
103 | lower_max_index = spectral_max_index(mag_info->lower_bins, | |
104 | SPECTRAL_HT20_40_NUM_BINS); | |
105 | ||
106 | upper_mag = spectral_max_magnitude(mag_info->upper_bins); | |
107 | upper_max_index = spectral_max_index(mag_info->upper_bins, | |
108 | SPECTRAL_HT20_40_NUM_BINS); | |
109 | ||
110 | max_exp = mag_info->max_exp & 0xf; | |
111 | ||
112 | /* Don't try to read something outside the read buffer | |
113 | * in case of a missing byte (so bins[0] will be outside | |
114 | * the read buffer) | |
115 | */ | |
116 | if (bytes_read < SPECTRAL_HT20_40_SAMPLE_LEN && | |
117 | ((upper_max_index < 1) || (lower_max_index < 1))) | |
118 | return -1; | |
119 | ||
120 | /* Some time hardware messes up the index and adds | |
121 | * the index of the middle point (dc_pos). Try to fix it. | |
122 | */ | |
123 | if ((upper_max_index - dc_pos > 0) && | |
124 | (sample[upper_max_index] == (upper_mag >> max_exp))) | |
125 | upper_max_index -= dc_pos; | |
126 | ||
127 | if ((lower_max_index - dc_pos > 0) && | |
128 | (sample[lower_max_index - dc_pos] == (lower_mag >> max_exp))) | |
129 | lower_max_index -= dc_pos; | |
130 | ||
131 | if ((sample[upper_max_index + dc_pos] != (upper_mag >> max_exp)) || | |
132 | (sample[lower_max_index] != (lower_mag >> max_exp))) | |
133 | return -1; | |
134 | else | |
135 | return 0; | |
136 | } | |
137 | ||
58b5e4c7 NK |
138 | typedef int (ath_cmn_fft_sample_handler) (struct ath_rx_status *rs, |
139 | struct ath_spec_scan_priv *spec_priv, | |
140 | u8 *sample_buf, u64 tsf, u16 freq, int chan_type); | |
141 | ||
142 | static int | |
143 | ath_cmn_process_ht20_fft(struct ath_rx_status *rs, | |
144 | struct ath_spec_scan_priv *spec_priv, | |
145 | u8 *sample_buf, | |
146 | u64 tsf, u16 freq, int chan_type) | |
147 | { | |
148 | struct fft_sample_ht20 fft_sample_20; | |
7fa580c1 | 149 | struct ath_common *common = ath9k_hw_common(spec_priv->ah); |
58b5e4c7 NK |
150 | struct ath_hw *ah = spec_priv->ah; |
151 | struct ath_ht20_mag_info *mag_info; | |
152 | struct fft_sample_tlv *tlv; | |
7fa580c1 NK |
153 | int i = 0; |
154 | int ret = 0; | |
58b5e4c7 | 155 | int dc_pos = SPECTRAL_HT20_NUM_BINS / 2; |
7fa580c1 NK |
156 | u16 magnitude, tmp_mag, length; |
157 | u8 max_index, bitmap_w, max_exp; | |
58b5e4c7 NK |
158 | |
159 | length = sizeof(fft_sample_20) - sizeof(struct fft_sample_tlv); | |
160 | fft_sample_20.tlv.type = ATH_FFT_SAMPLE_HT20; | |
161 | fft_sample_20.tlv.length = __cpu_to_be16(length); | |
162 | fft_sample_20.freq = __cpu_to_be16(freq); | |
163 | fft_sample_20.rssi = fix_rssi_inv_only(rs->rs_rssi_ctl[0]); | |
164 | fft_sample_20.noise = ah->noise; | |
165 | ||
166 | mag_info = (struct ath_ht20_mag_info *) (sample_buf + | |
167 | SPECTRAL_HT20_NUM_BINS); | |
168 | ||
169 | magnitude = spectral_max_magnitude(mag_info->all_bins); | |
170 | fft_sample_20.max_magnitude = __cpu_to_be16(magnitude); | |
171 | ||
172 | max_index = spectral_max_index(mag_info->all_bins, | |
173 | SPECTRAL_HT20_NUM_BINS); | |
174 | fft_sample_20.max_index = max_index; | |
175 | ||
176 | bitmap_w = spectral_bitmap_weight(mag_info->all_bins); | |
177 | fft_sample_20.bitmap_weight = bitmap_w; | |
178 | ||
7fa580c1 NK |
179 | max_exp = mag_info->max_exp & 0xf; |
180 | fft_sample_20.max_exp = max_exp; | |
58b5e4c7 NK |
181 | |
182 | fft_sample_20.tsf = __cpu_to_be64(tsf); | |
183 | ||
184 | memcpy(fft_sample_20.data, sample_buf, SPECTRAL_HT20_NUM_BINS); | |
185 | ||
7fa580c1 NK |
186 | ath_dbg(common, SPECTRAL_SCAN, "FFT HT20 frame: max mag 0x%X," |
187 | "max_mag_idx %i\n", | |
188 | magnitude >> max_exp, | |
189 | max_index); | |
190 | ||
191 | if (fft_sample_20.data[max_index] != (magnitude >> max_exp)) { | |
192 | ath_dbg(common, SPECTRAL_SCAN, "Magnitude mismatch !\n"); | |
193 | ret = -1; | |
194 | } | |
195 | ||
58b5e4c7 NK |
196 | /* DC value (value in the middle) is the blind spot of the spectral |
197 | * sample and invalid, interpolate it. | |
198 | */ | |
199 | fft_sample_20.data[dc_pos] = (fft_sample_20.data[dc_pos + 1] + | |
200 | fft_sample_20.data[dc_pos - 1]) / 2; | |
201 | ||
7fa580c1 NK |
202 | /* Check if the maximum magnitude is indeed maximum, |
203 | * also if the maximum value was at dc_pos, calculate | |
204 | * a new one (since value at dc_pos is invalid). | |
205 | */ | |
206 | if (max_index == dc_pos) { | |
207 | tmp_mag = 0; | |
208 | for (i = 0; i < dc_pos; i++) { | |
209 | if (fft_sample_20.data[i] > tmp_mag) { | |
210 | tmp_mag = fft_sample_20.data[i]; | |
211 | fft_sample_20.max_index = i; | |
212 | } | |
213 | } | |
214 | ||
215 | magnitude = tmp_mag << max_exp; | |
216 | fft_sample_20.max_magnitude = __cpu_to_be16(magnitude); | |
217 | ||
218 | ath_dbg(common, SPECTRAL_SCAN, | |
219 | "Calculated new lower max 0x%X at %i\n", | |
220 | tmp_mag, fft_sample_20.max_index); | |
221 | } else | |
222 | for (i = 0; i < SPECTRAL_HT20_NUM_BINS; i++) { | |
223 | if (fft_sample_20.data[i] == (magnitude >> max_exp)) | |
224 | ath_dbg(common, SPECTRAL_SCAN, | |
225 | "Got max: 0x%X at index %i\n", | |
226 | fft_sample_20.data[i], i); | |
227 | ||
228 | if (fft_sample_20.data[i] > (magnitude >> max_exp)) { | |
229 | ath_dbg(common, SPECTRAL_SCAN, | |
230 | "Got bin %i greater than max: 0x%X\n", | |
231 | i, fft_sample_20.data[i]); | |
232 | ret = -1; | |
233 | } | |
234 | } | |
235 | ||
236 | if (ret < 0) | |
237 | return ret; | |
238 | ||
58b5e4c7 NK |
239 | tlv = (struct fft_sample_tlv *)&fft_sample_20; |
240 | ||
241 | ath_debug_send_fft_sample(spec_priv, tlv); | |
242 | ||
243 | return 0; | |
244 | } | |
245 | ||
246 | static int | |
247 | ath_cmn_process_ht20_40_fft(struct ath_rx_status *rs, | |
248 | struct ath_spec_scan_priv *spec_priv, | |
249 | u8 *sample_buf, | |
250 | u64 tsf, u16 freq, int chan_type) | |
251 | { | |
252 | struct fft_sample_ht20_40 fft_sample_40; | |
7fa580c1 | 253 | struct ath_common *common = ath9k_hw_common(spec_priv->ah); |
58b5e4c7 NK |
254 | struct ath_hw *ah = spec_priv->ah; |
255 | struct ath9k_hw_cal_data *caldata = ah->caldata; | |
256 | struct ath_ht20_40_mag_info *mag_info; | |
257 | struct fft_sample_tlv *tlv; | |
258 | int dc_pos = SPECTRAL_HT20_40_NUM_BINS / 2; | |
7fa580c1 NK |
259 | int i = 0; |
260 | int ret = 0; | |
58b5e4c7 | 261 | s16 ext_nf; |
7fa580c1 | 262 | u16 lower_mag, upper_mag, tmp_mag, length; |
58b5e4c7 NK |
263 | s8 lower_rssi, upper_rssi; |
264 | u8 lower_max_index, upper_max_index; | |
7fa580c1 | 265 | u8 lower_bitmap_w, upper_bitmap_w, max_exp; |
58b5e4c7 NK |
266 | |
267 | if (caldata) | |
268 | ext_nf = ath9k_hw_getchan_noise(ah, ah->curchan, | |
269 | caldata->nfCalHist[3].privNF); | |
270 | else | |
271 | ext_nf = ATH_DEFAULT_NOISE_FLOOR; | |
272 | ||
273 | length = sizeof(fft_sample_40) - sizeof(struct fft_sample_tlv); | |
274 | fft_sample_40.tlv.type = ATH_FFT_SAMPLE_HT20_40; | |
275 | fft_sample_40.tlv.length = __cpu_to_be16(length); | |
276 | fft_sample_40.freq = __cpu_to_be16(freq); | |
277 | fft_sample_40.channel_type = chan_type; | |
278 | ||
279 | if (chan_type == NL80211_CHAN_HT40PLUS) { | |
280 | lower_rssi = fix_rssi_inv_only(rs->rs_rssi_ctl[0]); | |
281 | upper_rssi = fix_rssi_inv_only(rs->rs_rssi_ext[0]); | |
282 | ||
283 | fft_sample_40.lower_noise = ah->noise; | |
284 | fft_sample_40.upper_noise = ext_nf; | |
285 | } else { | |
286 | lower_rssi = fix_rssi_inv_only(rs->rs_rssi_ext[0]); | |
287 | upper_rssi = fix_rssi_inv_only(rs->rs_rssi_ctl[0]); | |
288 | ||
289 | fft_sample_40.lower_noise = ext_nf; | |
290 | fft_sample_40.upper_noise = ah->noise; | |
291 | } | |
292 | ||
293 | fft_sample_40.lower_rssi = lower_rssi; | |
294 | fft_sample_40.upper_rssi = upper_rssi; | |
295 | ||
296 | mag_info = (struct ath_ht20_40_mag_info *) (sample_buf + | |
297 | SPECTRAL_HT20_40_NUM_BINS); | |
298 | ||
299 | lower_mag = spectral_max_magnitude(mag_info->lower_bins); | |
300 | fft_sample_40.lower_max_magnitude = __cpu_to_be16(lower_mag); | |
301 | ||
302 | upper_mag = spectral_max_magnitude(mag_info->upper_bins); | |
303 | fft_sample_40.upper_max_magnitude = __cpu_to_be16(upper_mag); | |
304 | ||
305 | lower_max_index = spectral_max_index(mag_info->lower_bins, | |
306 | SPECTRAL_HT20_40_NUM_BINS); | |
307 | fft_sample_40.lower_max_index = lower_max_index; | |
308 | ||
309 | upper_max_index = spectral_max_index(mag_info->upper_bins, | |
310 | SPECTRAL_HT20_40_NUM_BINS); | |
311 | fft_sample_40.upper_max_index = upper_max_index; | |
312 | ||
313 | lower_bitmap_w = spectral_bitmap_weight(mag_info->lower_bins); | |
314 | fft_sample_40.lower_bitmap_weight = lower_bitmap_w; | |
315 | ||
316 | upper_bitmap_w = spectral_bitmap_weight(mag_info->upper_bins); | |
317 | fft_sample_40.upper_bitmap_weight = upper_bitmap_w; | |
318 | ||
7fa580c1 NK |
319 | max_exp = mag_info->max_exp & 0xf; |
320 | fft_sample_40.max_exp = max_exp; | |
58b5e4c7 NK |
321 | |
322 | fft_sample_40.tsf = __cpu_to_be64(tsf); | |
323 | ||
324 | memcpy(fft_sample_40.data, sample_buf, SPECTRAL_HT20_40_NUM_BINS); | |
325 | ||
7fa580c1 NK |
326 | ath_dbg(common, SPECTRAL_SCAN, "FFT HT20/40 frame: lower mag 0x%X," |
327 | "lower_mag_idx %i, upper mag 0x%X," | |
328 | "upper_mag_idx %i\n", | |
329 | lower_mag >> max_exp, | |
330 | lower_max_index, | |
331 | upper_mag >> max_exp, | |
332 | upper_max_index); | |
333 | ||
334 | /* Some time hardware messes up the index and adds | |
335 | * the index of the middle point (dc_pos). Try to fix it. | |
336 | */ | |
337 | if ((upper_max_index - dc_pos > 0) && | |
338 | (fft_sample_40.data[upper_max_index] == (upper_mag >> max_exp))) { | |
339 | upper_max_index -= dc_pos; | |
340 | fft_sample_40.upper_max_index = upper_max_index; | |
341 | } | |
342 | ||
343 | if ((lower_max_index - dc_pos > 0) && | |
344 | (fft_sample_40.data[lower_max_index - dc_pos] == | |
345 | (lower_mag >> max_exp))) { | |
346 | lower_max_index -= dc_pos; | |
347 | fft_sample_40.lower_max_index = lower_max_index; | |
348 | } | |
349 | ||
350 | /* Check if we got the expected magnitude values at | |
351 | * the expected bins | |
352 | */ | |
353 | if ((fft_sample_40.data[upper_max_index + dc_pos] | |
354 | != (upper_mag >> max_exp)) || | |
355 | (fft_sample_40.data[lower_max_index] | |
356 | != (lower_mag >> max_exp))) { | |
357 | ath_dbg(common, SPECTRAL_SCAN, "Magnitude mismatch !\n"); | |
358 | ret = -1; | |
359 | } | |
360 | ||
58b5e4c7 NK |
361 | /* DC value (value in the middle) is the blind spot of the spectral |
362 | * sample and invalid, interpolate it. | |
363 | */ | |
364 | fft_sample_40.data[dc_pos] = (fft_sample_40.data[dc_pos + 1] + | |
365 | fft_sample_40.data[dc_pos - 1]) / 2; | |
366 | ||
7fa580c1 NK |
367 | /* Check if the maximum magnitudes are indeed maximum, |
368 | * also if the maximum value was at dc_pos, calculate | |
369 | * a new one (since value at dc_pos is invalid). | |
370 | */ | |
371 | if (lower_max_index == dc_pos) { | |
372 | tmp_mag = 0; | |
373 | for (i = 0; i < dc_pos; i++) { | |
374 | if (fft_sample_40.data[i] > tmp_mag) { | |
375 | tmp_mag = fft_sample_40.data[i]; | |
376 | fft_sample_40.lower_max_index = i; | |
377 | } | |
378 | } | |
379 | ||
380 | lower_mag = tmp_mag << max_exp; | |
381 | fft_sample_40.lower_max_magnitude = __cpu_to_be16(lower_mag); | |
382 | ||
383 | ath_dbg(common, SPECTRAL_SCAN, | |
384 | "Calculated new lower max 0x%X at %i\n", | |
385 | tmp_mag, fft_sample_40.lower_max_index); | |
386 | } else | |
387 | for (i = 0; i < dc_pos; i++) { | |
388 | if (fft_sample_40.data[i] == (lower_mag >> max_exp)) | |
389 | ath_dbg(common, SPECTRAL_SCAN, | |
390 | "Got lower mag: 0x%X at index %i\n", | |
391 | fft_sample_40.data[i], i); | |
392 | ||
393 | if (fft_sample_40.data[i] > (lower_mag >> max_exp)) { | |
394 | ath_dbg(common, SPECTRAL_SCAN, | |
395 | "Got lower bin %i higher than max: 0x%X\n", | |
396 | i, fft_sample_40.data[i]); | |
397 | ret = -1; | |
398 | } | |
399 | } | |
400 | ||
401 | if (upper_max_index == dc_pos) { | |
402 | tmp_mag = 0; | |
403 | for (i = dc_pos; i < SPECTRAL_HT20_40_NUM_BINS; i++) { | |
404 | if (fft_sample_40.data[i] > tmp_mag) { | |
405 | tmp_mag = fft_sample_40.data[i]; | |
406 | fft_sample_40.upper_max_index = i; | |
407 | } | |
408 | } | |
409 | upper_mag = tmp_mag << max_exp; | |
410 | fft_sample_40.upper_max_magnitude = __cpu_to_be16(upper_mag); | |
411 | ||
412 | ath_dbg(common, SPECTRAL_SCAN, | |
413 | "Calculated new upper max 0x%X at %i\n", | |
414 | tmp_mag, i); | |
415 | } else | |
416 | for (i = dc_pos; i < SPECTRAL_HT20_40_NUM_BINS; i++) { | |
417 | if (fft_sample_40.data[i] == (upper_mag >> max_exp)) | |
418 | ath_dbg(common, SPECTRAL_SCAN, | |
419 | "Got upper mag: 0x%X at index %i\n", | |
420 | fft_sample_40.data[i], i); | |
421 | ||
422 | if (fft_sample_40.data[i] > (upper_mag >> max_exp)) { | |
423 | ath_dbg(common, SPECTRAL_SCAN, | |
424 | "Got upper bin %i higher than max: 0x%X\n", | |
425 | i, fft_sample_40.data[i]); | |
426 | ||
427 | ret = -1; | |
428 | } | |
429 | } | |
430 | ||
431 | if (ret < 0) | |
432 | return ret; | |
433 | ||
58b5e4c7 NK |
434 | tlv = (struct fft_sample_tlv *)&fft_sample_40; |
435 | ||
436 | ath_debug_send_fft_sample(spec_priv, tlv); | |
437 | ||
438 | return 0; | |
439 | } | |
440 | ||
0f2c75de NK |
441 | static inline void |
442 | ath_cmn_copy_fft_frame(u8 *in, u8 *out, int sample_len, int sample_bytes) | |
443 | { | |
444 | switch (sample_bytes - sample_len) { | |
445 | case -1: | |
446 | /* First byte missing */ | |
447 | memcpy(&out[1], in, | |
448 | sample_len - 1); | |
449 | break; | |
450 | case 0: | |
451 | /* Length correct, nothing to do. */ | |
452 | memcpy(out, in, sample_len); | |
453 | break; | |
454 | case 1: | |
455 | /* MAC added 2 extra bytes AND first byte | |
456 | * is missing. | |
457 | */ | |
458 | memcpy(&out[1], in, 30); | |
459 | out[31] = in[31]; | |
460 | memcpy(&out[32], &in[33], | |
461 | sample_len - 32); | |
462 | break; | |
463 | case 2: | |
464 | /* MAC added 2 extra bytes at bin 30 and 32, | |
465 | * remove them. | |
466 | */ | |
467 | memcpy(out, in, 30); | |
468 | out[30] = in[31]; | |
469 | memcpy(&out[31], &in[33], | |
470 | sample_len - 31); | |
471 | break; | |
472 | default: | |
473 | break; | |
474 | } | |
475 | } | |
476 | ||
6b8f85a9 NK |
477 | static int |
478 | ath_cmn_is_fft_buf_full(struct ath_spec_scan_priv *spec_priv) | |
479 | { | |
480 | int i = 0; | |
481 | int ret = 0; | |
482 | struct rchan *rc = spec_priv->rfs_chan_spec_scan; | |
483 | ||
484 | for_each_online_cpu(i) | |
485 | ret += relay_buf_full(rc->buf[i]); | |
486 | ||
487 | i = num_online_cpus(); | |
488 | ||
489 | if (ret == i) | |
490 | return 1; | |
491 | else | |
492 | return 0; | |
493 | } | |
494 | ||
f65c0825 | 495 | /* returns 1 if this was a spectral frame, even if not handled. */ |
67dc74f1 | 496 | int ath_cmn_process_fft(struct ath_spec_scan_priv *spec_priv, struct ieee80211_hdr *hdr, |
f65c0825 SM |
497 | struct ath_rx_status *rs, u64 tsf) |
498 | { | |
58b5e4c7 | 499 | u8 sample_buf[SPECTRAL_SAMPLE_MAX_LEN] = {0}; |
1111d426 OR |
500 | struct ath_hw *ah = spec_priv->ah; |
501 | struct ath_common *common = ath9k_hw_common(spec_priv->ah); | |
58b5e4c7 | 502 | u8 num_bins, *vdata = (u8 *)hdr; |
f65c0825 SM |
503 | struct ath_radar_info *radar_info; |
504 | int len = rs->rs_datalen; | |
72dd2cda NK |
505 | int i; |
506 | int got_slen = 0; | |
507 | u8 *sample_start; | |
508 | int sample_bytes = 0; | |
509 | int ret = 0; | |
58b5e4c7 | 510 | u16 fft_len, sample_len, freq = ah->curchan->chan->center_freq; |
f65c0825 | 511 | enum nl80211_channel_type chan_type; |
72dd2cda | 512 | ath_cmn_fft_idx_validator *fft_idx_validator; |
58b5e4c7 | 513 | ath_cmn_fft_sample_handler *fft_handler; |
f65c0825 SM |
514 | |
515 | /* AR9280 and before report via ATH9K_PHYERR_RADAR, AR93xx and newer | |
516 | * via ATH9K_PHYERR_SPECTRAL. Haven't seen ATH9K_PHYERR_FALSE_RADAR_EXT | |
517 | * yet, but this is supposed to be possible as well. | |
518 | */ | |
519 | if (rs->rs_phyerr != ATH9K_PHYERR_RADAR && | |
520 | rs->rs_phyerr != ATH9K_PHYERR_FALSE_RADAR_EXT && | |
521 | rs->rs_phyerr != ATH9K_PHYERR_SPECTRAL) | |
522 | return 0; | |
523 | ||
524 | /* check if spectral scan bit is set. This does not have to be checked | |
525 | * if received through a SPECTRAL phy error, but shouldn't hurt. | |
526 | */ | |
527 | radar_info = ((struct ath_radar_info *)&vdata[len]) - 1; | |
528 | if (!(radar_info->pulse_bw_info & SPECTRAL_SCAN_BITMASK)) | |
529 | return 0; | |
530 | ||
6b8f85a9 NK |
531 | /* Output buffers are full, no need to process anything |
532 | * since there is no space to put the result anyway | |
533 | */ | |
534 | ret = ath_cmn_is_fft_buf_full(spec_priv); | |
535 | if (ret == 1) { | |
536 | ath_dbg(common, SPECTRAL_SCAN, "FFT report ignored, no space " | |
537 | "left on output buffers\n"); | |
538 | return 1; | |
539 | } | |
540 | ||
1111d426 | 541 | chan_type = cfg80211_get_chandef_type(&common->hw->conf.chandef); |
f65c0825 SM |
542 | if ((chan_type == NL80211_CHAN_HT40MINUS) || |
543 | (chan_type == NL80211_CHAN_HT40PLUS)) { | |
544 | fft_len = SPECTRAL_HT20_40_TOTAL_DATA_LEN; | |
58b5e4c7 | 545 | sample_len = SPECTRAL_HT20_40_SAMPLE_LEN; |
f65c0825 | 546 | num_bins = SPECTRAL_HT20_40_NUM_BINS; |
72dd2cda | 547 | fft_idx_validator = &ath_cmn_max_idx_verify_ht20_40_fft; |
58b5e4c7 | 548 | fft_handler = &ath_cmn_process_ht20_40_fft; |
f65c0825 SM |
549 | } else { |
550 | fft_len = SPECTRAL_HT20_TOTAL_DATA_LEN; | |
58b5e4c7 | 551 | sample_len = SPECTRAL_HT20_SAMPLE_LEN; |
f65c0825 | 552 | num_bins = SPECTRAL_HT20_NUM_BINS; |
72dd2cda | 553 | fft_idx_validator = ath_cmn_max_idx_verify_ht20_fft; |
58b5e4c7 | 554 | fft_handler = &ath_cmn_process_ht20_fft; |
f65c0825 SM |
555 | } |
556 | ||
72dd2cda NK |
557 | ath_dbg(common, SPECTRAL_SCAN, "Got radar dump bw_info: 0x%X," |
558 | "len: %i fft_len: %i\n", | |
559 | radar_info->pulse_bw_info, | |
560 | len, | |
561 | fft_len); | |
562 | sample_start = vdata; | |
563 | for (i = 0; i < len - 2; i++) { | |
564 | sample_bytes++; | |
565 | ||
566 | /* Only a single sample received, no need to look | |
567 | * for the sample's end, do the correction based | |
568 | * on the packet's length instead. Note that hw | |
569 | * will always put the radar_info structure on | |
570 | * the end. | |
571 | */ | |
572 | if (len <= fft_len + 2) { | |
573 | sample_bytes = len - sizeof(struct ath_radar_info); | |
574 | got_slen = 1; | |
575 | } | |
f65c0825 | 576 | |
72dd2cda NK |
577 | /* Search for the end of the FFT frame between |
578 | * sample_len - 1 and sample_len + 2. exp_max is 3 | |
579 | * bits long and it's the only value on the last | |
580 | * byte of the frame so since it'll be smaller than | |
581 | * the next byte (the first bin of the next sample) | |
582 | * 90% of the time, we can use it as a separator. | |
583 | */ | |
584 | if (vdata[i] <= 0x7 && sample_bytes >= sample_len - 1) { | |
585 | ||
586 | /* Got a frame length within boundaries, there are | |
587 | * four scenarios here: | |
588 | * | |
589 | * a) sample_len -> We got the correct length | |
590 | * b) sample_len + 2 -> 2 bytes added around bin[31] | |
591 | * c) sample_len - 1 -> The first byte is missing | |
592 | * d) sample_len + 1 -> b + c at the same time | |
593 | * | |
594 | * When MAC adds 2 extra bytes, bin[31] and bin[32] | |
595 | * have the same value, so we can use that for further | |
596 | * verification in cases b and d. | |
597 | */ | |
598 | ||
599 | /* Did we go too far ? If so we couldn't determine | |
600 | * this sample's boundaries, discard any further | |
601 | * data | |
602 | */ | |
603 | if ((sample_bytes > sample_len + 2) || | |
604 | ((sample_bytes > sample_len) && | |
605 | (sample_start[31] != sample_start[32]))) | |
606 | break; | |
607 | ||
608 | /* See if we got a valid frame by checking the | |
609 | * consistency of mag_info fields. This is to | |
610 | * prevent from "fixing" a correct frame. | |
611 | * Failure is non-fatal, later frames may | |
612 | * be valid. | |
613 | */ | |
614 | if (!fft_idx_validator(&vdata[i], i)) { | |
615 | ath_dbg(common, SPECTRAL_SCAN, | |
616 | "Found valid fft frame at %i\n", i); | |
617 | got_slen = 1; | |
618 | } | |
619 | ||
620 | /* We expect 1 - 2 more bytes */ | |
621 | else if ((sample_start[31] == sample_start[32]) && | |
622 | (sample_bytes >= sample_len) && | |
623 | (sample_bytes < sample_len + 2) && | |
624 | (vdata[i + 1] <= 0x7)) | |
625 | continue; | |
f65c0825 | 626 | |
72dd2cda NK |
627 | /* Try to distinguish cases a and c */ |
628 | else if ((sample_bytes == sample_len - 1) && | |
629 | (vdata[i + 1] <= 0x7)) | |
630 | continue; | |
631 | ||
632 | got_slen = 1; | |
633 | } | |
634 | ||
635 | if (got_slen) { | |
636 | ath_dbg(common, SPECTRAL_SCAN, "FFT frame len: %i\n", | |
637 | sample_bytes); | |
0f2c75de NK |
638 | |
639 | /* Only try to fix a frame if it's the only one | |
640 | * on the report, else just skip it. | |
641 | */ | |
642 | if (sample_bytes != sample_len && len <= fft_len + 2) { | |
643 | ath_cmn_copy_fft_frame(sample_start, | |
644 | sample_buf, sample_len, | |
645 | sample_bytes); | |
646 | ||
647 | fft_handler(rs, spec_priv, sample_buf, | |
648 | tsf, freq, chan_type); | |
3ea2ce3f NK |
649 | |
650 | memset(sample_buf, 0, SPECTRAL_SAMPLE_MAX_LEN); | |
2aa56cca NK |
651 | |
652 | /* Mix the received bins to the /dev/random | |
653 | * pool | |
654 | */ | |
655 | add_device_randomness(sample_buf, num_bins); | |
0f2c75de NK |
656 | } |
657 | ||
658 | /* Process a normal frame */ | |
2aa56cca | 659 | if (sample_bytes == sample_len) { |
9acc98b9 | 660 | ret = fft_handler(rs, spec_priv, sample_start, |
0f2c75de | 661 | tsf, freq, chan_type); |
72dd2cda | 662 | |
2aa56cca NK |
663 | /* Mix the received bins to the /dev/random |
664 | * pool | |
665 | */ | |
666 | add_device_randomness(sample_start, num_bins); | |
667 | } | |
668 | ||
0f2c75de NK |
669 | /* Short report processed, break out of the |
670 | * loop. | |
671 | */ | |
672 | if (len <= fft_len + 2) | |
673 | break; | |
674 | ||
72dd2cda | 675 | sample_start = &vdata[i + 1]; |
0f2c75de | 676 | |
72dd2cda NK |
677 | /* -1 to grab sample_len -1, -2 since |
678 | * they 'll get increased by one. In case | |
679 | * of failure try to recover by going byte | |
0f2c75de NK |
680 | * by byte instead. |
681 | */ | |
72dd2cda NK |
682 | if (ret == 0) { |
683 | i += num_bins - 2; | |
684 | sample_bytes = num_bins - 2; | |
685 | } | |
686 | got_slen = 0; | |
687 | } | |
688 | } | |
f65c0825 | 689 | |
72dd2cda NK |
690 | i -= num_bins - 2; |
691 | if (len - i != sizeof(struct ath_radar_info)) | |
692 | ath_dbg(common, SPECTRAL_SCAN, "FFT report truncated" | |
693 | "(bytes left: %i)\n", | |
694 | len - i); | |
f65c0825 SM |
695 | return 1; |
696 | } | |
67dc74f1 | 697 | EXPORT_SYMBOL(ath_cmn_process_fft); |
f65c0825 SM |
698 | |
699 | /*********************/ | |
700 | /* spectral_scan_ctl */ | |
701 | /*********************/ | |
702 | ||
703 | static ssize_t read_file_spec_scan_ctl(struct file *file, char __user *user_buf, | |
704 | size_t count, loff_t *ppos) | |
705 | { | |
1111d426 | 706 | struct ath_spec_scan_priv *spec_priv = file->private_data; |
f65c0825 SM |
707 | char *mode = ""; |
708 | unsigned int len; | |
709 | ||
1111d426 | 710 | switch (spec_priv->spectral_mode) { |
f65c0825 SM |
711 | case SPECTRAL_DISABLED: |
712 | mode = "disable"; | |
713 | break; | |
714 | case SPECTRAL_BACKGROUND: | |
715 | mode = "background"; | |
716 | break; | |
717 | case SPECTRAL_CHANSCAN: | |
718 | mode = "chanscan"; | |
719 | break; | |
720 | case SPECTRAL_MANUAL: | |
721 | mode = "manual"; | |
722 | break; | |
723 | } | |
724 | len = strlen(mode); | |
725 | return simple_read_from_buffer(user_buf, count, ppos, mode, len); | |
726 | } | |
727 | ||
67dc74f1 | 728 | void ath9k_cmn_spectral_scan_trigger(struct ath_common *common, |
f00a422c OR |
729 | struct ath_spec_scan_priv *spec_priv) |
730 | { | |
731 | struct ath_hw *ah = spec_priv->ah; | |
732 | u32 rxfilter; | |
733 | ||
734 | if (config_enabled(CONFIG_ATH9K_TX99)) | |
735 | return; | |
736 | ||
737 | if (!ath9k_hw_ops(ah)->spectral_scan_trigger) { | |
738 | ath_err(common, "spectrum analyzer not implemented on this hardware\n"); | |
739 | return; | |
740 | } | |
741 | ||
742 | ath_ps_ops(common)->wakeup(common); | |
743 | rxfilter = ath9k_hw_getrxfilter(ah); | |
744 | ath9k_hw_setrxfilter(ah, rxfilter | | |
745 | ATH9K_RX_FILTER_PHYRADAR | | |
746 | ATH9K_RX_FILTER_PHYERR); | |
747 | ||
748 | /* TODO: usually this should not be neccesary, but for some reason | |
749 | * (or in some mode?) the trigger must be called after the | |
750 | * configuration, otherwise the register will have its values reset | |
751 | * (on my ar9220 to value 0x01002310) | |
752 | */ | |
67dc74f1 | 753 | ath9k_cmn_spectral_scan_config(common, spec_priv, spec_priv->spectral_mode); |
f00a422c OR |
754 | ath9k_hw_ops(ah)->spectral_scan_trigger(ah); |
755 | ath_ps_ops(common)->restore(common); | |
756 | } | |
67dc74f1 | 757 | EXPORT_SYMBOL(ath9k_cmn_spectral_scan_trigger); |
f00a422c | 758 | |
67dc74f1 | 759 | int ath9k_cmn_spectral_scan_config(struct ath_common *common, |
f00a422c OR |
760 | struct ath_spec_scan_priv *spec_priv, |
761 | enum spectral_mode spectral_mode) | |
762 | { | |
763 | struct ath_hw *ah = spec_priv->ah; | |
764 | ||
765 | if (!ath9k_hw_ops(ah)->spectral_scan_trigger) { | |
766 | ath_err(common, "spectrum analyzer not implemented on this hardware\n"); | |
767 | return -1; | |
768 | } | |
769 | ||
770 | switch (spectral_mode) { | |
771 | case SPECTRAL_DISABLED: | |
772 | spec_priv->spec_config.enabled = 0; | |
773 | break; | |
774 | case SPECTRAL_BACKGROUND: | |
775 | /* send endless samples. | |
776 | * TODO: is this really useful for "background"? | |
777 | */ | |
778 | spec_priv->spec_config.endless = 1; | |
779 | spec_priv->spec_config.enabled = 1; | |
780 | break; | |
781 | case SPECTRAL_CHANSCAN: | |
782 | case SPECTRAL_MANUAL: | |
783 | spec_priv->spec_config.endless = 0; | |
784 | spec_priv->spec_config.enabled = 1; | |
785 | break; | |
786 | default: | |
787 | return -1; | |
788 | } | |
789 | ||
790 | ath_ps_ops(common)->wakeup(common); | |
791 | ath9k_hw_ops(ah)->spectral_scan_config(ah, &spec_priv->spec_config); | |
792 | ath_ps_ops(common)->restore(common); | |
793 | ||
794 | spec_priv->spectral_mode = spectral_mode; | |
795 | ||
796 | return 0; | |
797 | } | |
67dc74f1 | 798 | EXPORT_SYMBOL(ath9k_cmn_spectral_scan_config); |
f00a422c | 799 | |
f65c0825 SM |
800 | static ssize_t write_file_spec_scan_ctl(struct file *file, |
801 | const char __user *user_buf, | |
802 | size_t count, loff_t *ppos) | |
803 | { | |
1111d426 OR |
804 | struct ath_spec_scan_priv *spec_priv = file->private_data; |
805 | struct ath_common *common = ath9k_hw_common(spec_priv->ah); | |
f65c0825 SM |
806 | char buf[32]; |
807 | ssize_t len; | |
808 | ||
809 | if (config_enabled(CONFIG_ATH9K_TX99)) | |
810 | return -EOPNOTSUPP; | |
811 | ||
812 | len = min(count, sizeof(buf) - 1); | |
813 | if (copy_from_user(buf, user_buf, len)) | |
814 | return -EFAULT; | |
815 | ||
816 | buf[len] = '\0'; | |
817 | ||
818 | if (strncmp("trigger", buf, 7) == 0) { | |
67dc74f1 | 819 | ath9k_cmn_spectral_scan_trigger(common, spec_priv); |
ded3fb4c | 820 | } else if (strncmp("background", buf, 10) == 0) { |
67dc74f1 | 821 | ath9k_cmn_spectral_scan_config(common, spec_priv, SPECTRAL_BACKGROUND); |
f65c0825 SM |
822 | ath_dbg(common, CONFIG, "spectral scan: background mode enabled\n"); |
823 | } else if (strncmp("chanscan", buf, 8) == 0) { | |
67dc74f1 | 824 | ath9k_cmn_spectral_scan_config(common, spec_priv, SPECTRAL_CHANSCAN); |
f65c0825 SM |
825 | ath_dbg(common, CONFIG, "spectral scan: channel scan mode enabled\n"); |
826 | } else if (strncmp("manual", buf, 6) == 0) { | |
67dc74f1 | 827 | ath9k_cmn_spectral_scan_config(common, spec_priv, SPECTRAL_MANUAL); |
f65c0825 SM |
828 | ath_dbg(common, CONFIG, "spectral scan: manual mode enabled\n"); |
829 | } else if (strncmp("disable", buf, 7) == 0) { | |
67dc74f1 | 830 | ath9k_cmn_spectral_scan_config(common, spec_priv, SPECTRAL_DISABLED); |
f65c0825 SM |
831 | ath_dbg(common, CONFIG, "spectral scan: disabled\n"); |
832 | } else { | |
833 | return -EINVAL; | |
834 | } | |
835 | ||
836 | return count; | |
837 | } | |
838 | ||
839 | static const struct file_operations fops_spec_scan_ctl = { | |
840 | .read = read_file_spec_scan_ctl, | |
841 | .write = write_file_spec_scan_ctl, | |
842 | .open = simple_open, | |
843 | .owner = THIS_MODULE, | |
844 | .llseek = default_llseek, | |
845 | }; | |
846 | ||
847 | /*************************/ | |
848 | /* spectral_short_repeat */ | |
849 | /*************************/ | |
850 | ||
851 | static ssize_t read_file_spectral_short_repeat(struct file *file, | |
852 | char __user *user_buf, | |
853 | size_t count, loff_t *ppos) | |
854 | { | |
1111d426 | 855 | struct ath_spec_scan_priv *spec_priv = file->private_data; |
f65c0825 SM |
856 | char buf[32]; |
857 | unsigned int len; | |
858 | ||
1111d426 | 859 | len = sprintf(buf, "%d\n", spec_priv->spec_config.short_repeat); |
f65c0825 SM |
860 | return simple_read_from_buffer(user_buf, count, ppos, buf, len); |
861 | } | |
862 | ||
863 | static ssize_t write_file_spectral_short_repeat(struct file *file, | |
864 | const char __user *user_buf, | |
865 | size_t count, loff_t *ppos) | |
866 | { | |
1111d426 | 867 | struct ath_spec_scan_priv *spec_priv = file->private_data; |
f65c0825 SM |
868 | unsigned long val; |
869 | char buf[32]; | |
870 | ssize_t len; | |
871 | ||
872 | len = min(count, sizeof(buf) - 1); | |
873 | if (copy_from_user(buf, user_buf, len)) | |
874 | return -EFAULT; | |
875 | ||
876 | buf[len] = '\0'; | |
877 | if (kstrtoul(buf, 0, &val)) | |
878 | return -EINVAL; | |
879 | ||
3f557202 | 880 | if (val > 1) |
f65c0825 SM |
881 | return -EINVAL; |
882 | ||
1111d426 | 883 | spec_priv->spec_config.short_repeat = val; |
f65c0825 SM |
884 | return count; |
885 | } | |
886 | ||
887 | static const struct file_operations fops_spectral_short_repeat = { | |
888 | .read = read_file_spectral_short_repeat, | |
889 | .write = write_file_spectral_short_repeat, | |
890 | .open = simple_open, | |
891 | .owner = THIS_MODULE, | |
892 | .llseek = default_llseek, | |
893 | }; | |
894 | ||
895 | /******************/ | |
896 | /* spectral_count */ | |
897 | /******************/ | |
898 | ||
899 | static ssize_t read_file_spectral_count(struct file *file, | |
900 | char __user *user_buf, | |
901 | size_t count, loff_t *ppos) | |
902 | { | |
1111d426 | 903 | struct ath_spec_scan_priv *spec_priv = file->private_data; |
f65c0825 SM |
904 | char buf[32]; |
905 | unsigned int len; | |
906 | ||
1111d426 | 907 | len = sprintf(buf, "%d\n", spec_priv->spec_config.count); |
f65c0825 SM |
908 | return simple_read_from_buffer(user_buf, count, ppos, buf, len); |
909 | } | |
910 | ||
911 | static ssize_t write_file_spectral_count(struct file *file, | |
912 | const char __user *user_buf, | |
913 | size_t count, loff_t *ppos) | |
914 | { | |
1111d426 | 915 | struct ath_spec_scan_priv *spec_priv = file->private_data; |
f65c0825 SM |
916 | unsigned long val; |
917 | char buf[32]; | |
918 | ssize_t len; | |
919 | ||
920 | len = min(count, sizeof(buf) - 1); | |
921 | if (copy_from_user(buf, user_buf, len)) | |
922 | return -EFAULT; | |
923 | ||
924 | buf[len] = '\0'; | |
925 | if (kstrtoul(buf, 0, &val)) | |
926 | return -EINVAL; | |
927 | ||
3f557202 | 928 | if (val > 255) |
f65c0825 SM |
929 | return -EINVAL; |
930 | ||
1111d426 | 931 | spec_priv->spec_config.count = val; |
f65c0825 SM |
932 | return count; |
933 | } | |
934 | ||
935 | static const struct file_operations fops_spectral_count = { | |
936 | .read = read_file_spectral_count, | |
937 | .write = write_file_spectral_count, | |
938 | .open = simple_open, | |
939 | .owner = THIS_MODULE, | |
940 | .llseek = default_llseek, | |
941 | }; | |
942 | ||
943 | /*******************/ | |
944 | /* spectral_period */ | |
945 | /*******************/ | |
946 | ||
947 | static ssize_t read_file_spectral_period(struct file *file, | |
948 | char __user *user_buf, | |
949 | size_t count, loff_t *ppos) | |
950 | { | |
1111d426 | 951 | struct ath_spec_scan_priv *spec_priv = file->private_data; |
f65c0825 SM |
952 | char buf[32]; |
953 | unsigned int len; | |
954 | ||
1111d426 | 955 | len = sprintf(buf, "%d\n", spec_priv->spec_config.period); |
f65c0825 SM |
956 | return simple_read_from_buffer(user_buf, count, ppos, buf, len); |
957 | } | |
958 | ||
959 | static ssize_t write_file_spectral_period(struct file *file, | |
960 | const char __user *user_buf, | |
961 | size_t count, loff_t *ppos) | |
962 | { | |
1111d426 | 963 | struct ath_spec_scan_priv *spec_priv = file->private_data; |
f65c0825 SM |
964 | unsigned long val; |
965 | char buf[32]; | |
966 | ssize_t len; | |
967 | ||
968 | len = min(count, sizeof(buf) - 1); | |
969 | if (copy_from_user(buf, user_buf, len)) | |
970 | return -EFAULT; | |
971 | ||
972 | buf[len] = '\0'; | |
973 | if (kstrtoul(buf, 0, &val)) | |
974 | return -EINVAL; | |
975 | ||
3f557202 | 976 | if (val > 255) |
f65c0825 SM |
977 | return -EINVAL; |
978 | ||
1111d426 | 979 | spec_priv->spec_config.period = val; |
f65c0825 SM |
980 | return count; |
981 | } | |
982 | ||
983 | static const struct file_operations fops_spectral_period = { | |
984 | .read = read_file_spectral_period, | |
985 | .write = write_file_spectral_period, | |
986 | .open = simple_open, | |
987 | .owner = THIS_MODULE, | |
988 | .llseek = default_llseek, | |
989 | }; | |
990 | ||
991 | /***********************/ | |
992 | /* spectral_fft_period */ | |
993 | /***********************/ | |
994 | ||
995 | static ssize_t read_file_spectral_fft_period(struct file *file, | |
996 | char __user *user_buf, | |
997 | size_t count, loff_t *ppos) | |
998 | { | |
1111d426 | 999 | struct ath_spec_scan_priv *spec_priv = file->private_data; |
f65c0825 SM |
1000 | char buf[32]; |
1001 | unsigned int len; | |
1002 | ||
1111d426 | 1003 | len = sprintf(buf, "%d\n", spec_priv->spec_config.fft_period); |
f65c0825 SM |
1004 | return simple_read_from_buffer(user_buf, count, ppos, buf, len); |
1005 | } | |
1006 | ||
1007 | static ssize_t write_file_spectral_fft_period(struct file *file, | |
1008 | const char __user *user_buf, | |
1009 | size_t count, loff_t *ppos) | |
1010 | { | |
1111d426 | 1011 | struct ath_spec_scan_priv *spec_priv = file->private_data; |
f65c0825 SM |
1012 | unsigned long val; |
1013 | char buf[32]; | |
1014 | ssize_t len; | |
1015 | ||
1016 | len = min(count, sizeof(buf) - 1); | |
1017 | if (copy_from_user(buf, user_buf, len)) | |
1018 | return -EFAULT; | |
1019 | ||
1020 | buf[len] = '\0'; | |
1021 | if (kstrtoul(buf, 0, &val)) | |
1022 | return -EINVAL; | |
1023 | ||
3f557202 | 1024 | if (val > 15) |
f65c0825 SM |
1025 | return -EINVAL; |
1026 | ||
1111d426 | 1027 | spec_priv->spec_config.fft_period = val; |
f65c0825 SM |
1028 | return count; |
1029 | } | |
1030 | ||
1031 | static const struct file_operations fops_spectral_fft_period = { | |
1032 | .read = read_file_spectral_fft_period, | |
1033 | .write = write_file_spectral_fft_period, | |
1034 | .open = simple_open, | |
1035 | .owner = THIS_MODULE, | |
1036 | .llseek = default_llseek, | |
1037 | }; | |
1038 | ||
1039 | /*******************/ | |
1040 | /* Relay interface */ | |
1041 | /*******************/ | |
1042 | ||
1043 | static struct dentry *create_buf_file_handler(const char *filename, | |
1044 | struct dentry *parent, | |
1045 | umode_t mode, | |
1046 | struct rchan_buf *buf, | |
1047 | int *is_global) | |
1048 | { | |
1049 | struct dentry *buf_file; | |
1050 | ||
1051 | buf_file = debugfs_create_file(filename, mode, parent, buf, | |
1052 | &relay_file_operations); | |
1053 | *is_global = 1; | |
1054 | return buf_file; | |
1055 | } | |
1056 | ||
1057 | static int remove_buf_file_handler(struct dentry *dentry) | |
1058 | { | |
1059 | debugfs_remove(dentry); | |
1060 | ||
1061 | return 0; | |
1062 | } | |
1063 | ||
f84d1b49 | 1064 | static struct rchan_callbacks rfs_spec_scan_cb = { |
f65c0825 SM |
1065 | .create_buf_file = create_buf_file_handler, |
1066 | .remove_buf_file = remove_buf_file_handler, | |
1067 | }; | |
1068 | ||
1069 | /*********************/ | |
1070 | /* Debug Init/Deinit */ | |
1071 | /*********************/ | |
1072 | ||
67dc74f1 | 1073 | void ath9k_cmn_spectral_deinit_debug(struct ath_spec_scan_priv *spec_priv) |
f65c0825 | 1074 | { |
c0420ea0 | 1075 | if (config_enabled(CONFIG_ATH9K_DEBUGFS)) { |
1111d426 OR |
1076 | relay_close(spec_priv->rfs_chan_spec_scan); |
1077 | spec_priv->rfs_chan_spec_scan = NULL; | |
f65c0825 SM |
1078 | } |
1079 | } | |
67dc74f1 | 1080 | EXPORT_SYMBOL(ath9k_cmn_spectral_deinit_debug); |
f65c0825 | 1081 | |
67dc74f1 OR |
1082 | void ath9k_cmn_spectral_init_debug(struct ath_spec_scan_priv *spec_priv, |
1083 | struct dentry *debugfs_phy) | |
f65c0825 | 1084 | { |
1111d426 | 1085 | spec_priv->rfs_chan_spec_scan = relay_open("spectral_scan", |
c10b75af | 1086 | debugfs_phy, |
f65c0825 SM |
1087 | 1024, 256, &rfs_spec_scan_cb, |
1088 | NULL); | |
1089 | debugfs_create_file("spectral_scan_ctl", | |
1090 | S_IRUSR | S_IWUSR, | |
1111d426 | 1091 | debugfs_phy, spec_priv, |
f65c0825 SM |
1092 | &fops_spec_scan_ctl); |
1093 | debugfs_create_file("spectral_short_repeat", | |
1094 | S_IRUSR | S_IWUSR, | |
1111d426 | 1095 | debugfs_phy, spec_priv, |
f65c0825 SM |
1096 | &fops_spectral_short_repeat); |
1097 | debugfs_create_file("spectral_count", | |
1098 | S_IRUSR | S_IWUSR, | |
1111d426 | 1099 | debugfs_phy, spec_priv, |
f65c0825 SM |
1100 | &fops_spectral_count); |
1101 | debugfs_create_file("spectral_period", | |
1102 | S_IRUSR | S_IWUSR, | |
1111d426 | 1103 | debugfs_phy, spec_priv, |
f65c0825 SM |
1104 | &fops_spectral_period); |
1105 | debugfs_create_file("spectral_fft_period", | |
1106 | S_IRUSR | S_IWUSR, | |
1111d426 | 1107 | debugfs_phy, spec_priv, |
f65c0825 SM |
1108 | &fops_spectral_fft_period); |
1109 | } | |
67dc74f1 | 1110 | EXPORT_SYMBOL(ath9k_cmn_spectral_init_debug); |