Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * Digital Audio (PCM) abstract layer | |
c1017a4c | 3 | * Copyright (c) by Jaroslav Kysela <perex@perex.cz> |
1da177e4 LT |
4 | * Abramo Bagnara <abramo@alsa-project.org> |
5 | * | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program; if not, write to the Free Software | |
19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
20 | * | |
21 | */ | |
22 | ||
1da177e4 | 23 | #include <linux/slab.h> |
174cd4b1 | 24 | #include <linux/sched/signal.h> |
1da177e4 | 25 | #include <linux/time.h> |
3f7440a6 | 26 | #include <linux/math64.h> |
d81a6d71 | 27 | #include <linux/export.h> |
1da177e4 LT |
28 | #include <sound/core.h> |
29 | #include <sound/control.h> | |
2d3391ec | 30 | #include <sound/tlv.h> |
1da177e4 LT |
31 | #include <sound/info.h> |
32 | #include <sound/pcm.h> | |
33 | #include <sound/pcm_params.h> | |
34 | #include <sound/timer.h> | |
35 | ||
2c4842d3 TS |
36 | #include "pcm_local.h" |
37 | ||
f5914908 TI |
38 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
39 | #define CREATE_TRACE_POINTS | |
40 | #include "pcm_trace.h" | |
41 | #else | |
42 | #define trace_hwptr(substream, pos, in_interrupt) | |
43 | #define trace_xrun(substream) | |
44 | #define trace_hw_ptr_error(substream, reason) | |
45 | #endif | |
46 | ||
a9cd29e7 TI |
47 | static int fill_silence_frames(struct snd_pcm_substream *substream, |
48 | snd_pcm_uframes_t off, snd_pcm_uframes_t frames); | |
49 | ||
1da177e4 LT |
50 | /* |
51 | * fill ring buffer with silence | |
52 | * runtime->silence_start: starting pointer to silence area | |
53 | * runtime->silence_filled: size filled with silence | |
54 | * runtime->silence_threshold: threshold from application | |
55 | * runtime->silence_size: maximal size from application | |
56 | * | |
57 | * when runtime->silence_size >= runtime->boundary - fill processed area with silence immediately | |
58 | */ | |
877211f5 | 59 | void snd_pcm_playback_silence(struct snd_pcm_substream *substream, snd_pcm_uframes_t new_hw_ptr) |
1da177e4 | 60 | { |
877211f5 | 61 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 | 62 | snd_pcm_uframes_t frames, ofs, transfer; |
29d1a873 | 63 | int err; |
1da177e4 LT |
64 | |
65 | if (runtime->silence_size < runtime->boundary) { | |
66 | snd_pcm_sframes_t noise_dist, n; | |
67 | if (runtime->silence_start != runtime->control->appl_ptr) { | |
68 | n = runtime->control->appl_ptr - runtime->silence_start; | |
69 | if (n < 0) | |
70 | n += runtime->boundary; | |
71 | if ((snd_pcm_uframes_t)n < runtime->silence_filled) | |
72 | runtime->silence_filled -= n; | |
73 | else | |
74 | runtime->silence_filled = 0; | |
75 | runtime->silence_start = runtime->control->appl_ptr; | |
76 | } | |
235475cb | 77 | if (runtime->silence_filled >= runtime->buffer_size) |
1da177e4 | 78 | return; |
1da177e4 LT |
79 | noise_dist = snd_pcm_playback_hw_avail(runtime) + runtime->silence_filled; |
80 | if (noise_dist >= (snd_pcm_sframes_t) runtime->silence_threshold) | |
81 | return; | |
82 | frames = runtime->silence_threshold - noise_dist; | |
83 | if (frames > runtime->silence_size) | |
84 | frames = runtime->silence_size; | |
85 | } else { | |
86 | if (new_hw_ptr == ULONG_MAX) { /* initialization */ | |
87 | snd_pcm_sframes_t avail = snd_pcm_playback_hw_avail(runtime); | |
9e216e8a JK |
88 | if (avail > runtime->buffer_size) |
89 | avail = runtime->buffer_size; | |
1da177e4 LT |
90 | runtime->silence_filled = avail > 0 ? avail : 0; |
91 | runtime->silence_start = (runtime->status->hw_ptr + | |
92 | runtime->silence_filled) % | |
93 | runtime->boundary; | |
94 | } else { | |
95 | ofs = runtime->status->hw_ptr; | |
96 | frames = new_hw_ptr - ofs; | |
97 | if ((snd_pcm_sframes_t)frames < 0) | |
98 | frames += runtime->boundary; | |
99 | runtime->silence_filled -= frames; | |
100 | if ((snd_pcm_sframes_t)runtime->silence_filled < 0) { | |
101 | runtime->silence_filled = 0; | |
9a826ddb | 102 | runtime->silence_start = new_hw_ptr; |
1da177e4 | 103 | } else { |
9a826ddb | 104 | runtime->silence_start = ofs; |
1da177e4 | 105 | } |
1da177e4 LT |
106 | } |
107 | frames = runtime->buffer_size - runtime->silence_filled; | |
108 | } | |
7eaa943c TI |
109 | if (snd_BUG_ON(frames > runtime->buffer_size)) |
110 | return; | |
1da177e4 LT |
111 | if (frames == 0) |
112 | return; | |
9a826ddb | 113 | ofs = runtime->silence_start % runtime->buffer_size; |
1da177e4 LT |
114 | while (frames > 0) { |
115 | transfer = ofs + frames > runtime->buffer_size ? runtime->buffer_size - ofs : frames; | |
a9cd29e7 TI |
116 | err = fill_silence_frames(substream, ofs, transfer); |
117 | snd_BUG_ON(err < 0); | |
1da177e4 LT |
118 | runtime->silence_filled += transfer; |
119 | frames -= transfer; | |
120 | ofs = 0; | |
121 | } | |
122 | } | |
123 | ||
acb03d44 EB |
124 | #ifdef CONFIG_SND_DEBUG |
125 | void snd_pcm_debug_name(struct snd_pcm_substream *substream, | |
c0070110 TI |
126 | char *name, size_t len) |
127 | { | |
128 | snprintf(name, len, "pcmC%dD%d%c:%d", | |
129 | substream->pcm->card->number, | |
130 | substream->pcm->device, | |
131 | substream->stream ? 'c' : 'p', | |
132 | substream->number); | |
133 | } | |
acb03d44 EB |
134 | EXPORT_SYMBOL(snd_pcm_debug_name); |
135 | #endif | |
c0070110 | 136 | |
741b20cf JK |
137 | #define XRUN_DEBUG_BASIC (1<<0) |
138 | #define XRUN_DEBUG_STACK (1<<1) /* dump also stack */ | |
139 | #define XRUN_DEBUG_JIFFIESCHECK (1<<2) /* do jiffies check */ | |
741b20cf | 140 | |
ed3da3d9 | 141 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
4d96eb25 | 142 | |
741b20cf JK |
143 | #define xrun_debug(substream, mask) \ |
144 | ((substream)->pstr->xrun_debug & (mask)) | |
0f17014b JN |
145 | #else |
146 | #define xrun_debug(substream, mask) 0 | |
147 | #endif | |
ed3da3d9 | 148 | |
741b20cf JK |
149 | #define dump_stack_on_xrun(substream) do { \ |
150 | if (xrun_debug(substream, XRUN_DEBUG_STACK)) \ | |
151 | dump_stack(); \ | |
ed3da3d9 TI |
152 | } while (0) |
153 | ||
877211f5 | 154 | static void xrun(struct snd_pcm_substream *substream) |
1da177e4 | 155 | { |
13f040f9 JK |
156 | struct snd_pcm_runtime *runtime = substream->runtime; |
157 | ||
f5914908 | 158 | trace_xrun(substream); |
13f040f9 JK |
159 | if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) |
160 | snd_pcm_gettime(runtime, (struct timespec *)&runtime->status->tstamp); | |
1da177e4 | 161 | snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN); |
741b20cf | 162 | if (xrun_debug(substream, XRUN_DEBUG_BASIC)) { |
c0070110 | 163 | char name[16]; |
acb03d44 | 164 | snd_pcm_debug_name(substream, name, sizeof(name)); |
09e56df8 | 165 | pcm_warn(substream->pcm, "XRUN: %s\n", name); |
ed3da3d9 | 166 | dump_stack_on_xrun(substream); |
1da177e4 | 167 | } |
1da177e4 LT |
168 | } |
169 | ||
0f17014b | 170 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
f5914908 | 171 | #define hw_ptr_error(substream, in_interrupt, reason, fmt, args...) \ |
4d96eb25 | 172 | do { \ |
f5914908 | 173 | trace_hw_ptr_error(substream, reason); \ |
4d96eb25 | 174 | if (xrun_debug(substream, XRUN_DEBUG_BASIC)) { \ |
f5914908 TI |
175 | pr_err_ratelimited("ALSA: PCM: [%c] " reason ": " fmt, \ |
176 | (in_interrupt) ? 'Q' : 'P', ##args); \ | |
4d96eb25 JK |
177 | dump_stack_on_xrun(substream); \ |
178 | } \ | |
179 | } while (0) | |
180 | ||
4d96eb25 JK |
181 | #else /* ! CONFIG_SND_PCM_XRUN_DEBUG */ |
182 | ||
4d96eb25 | 183 | #define hw_ptr_error(substream, fmt, args...) do { } while (0) |
4d96eb25 JK |
184 | |
185 | #endif | |
186 | ||
1250932e JK |
187 | int snd_pcm_update_state(struct snd_pcm_substream *substream, |
188 | struct snd_pcm_runtime *runtime) | |
1da177e4 LT |
189 | { |
190 | snd_pcm_uframes_t avail; | |
191 | ||
192 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) | |
193 | avail = snd_pcm_playback_avail(runtime); | |
194 | else | |
195 | avail = snd_pcm_capture_avail(runtime); | |
196 | if (avail > runtime->avail_max) | |
197 | runtime->avail_max = avail; | |
4cdc115f TI |
198 | if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) { |
199 | if (avail >= runtime->buffer_size) { | |
1da177e4 | 200 | snd_pcm_drain_done(substream); |
4cdc115f TI |
201 | return -EPIPE; |
202 | } | |
203 | } else { | |
204 | if (avail >= runtime->stop_threshold) { | |
1da177e4 | 205 | xrun(substream); |
4cdc115f TI |
206 | return -EPIPE; |
207 | } | |
1da177e4 | 208 | } |
5daeba34 DD |
209 | if (runtime->twake) { |
210 | if (avail >= runtime->twake) | |
211 | wake_up(&runtime->tsleep); | |
212 | } else if (avail >= runtime->control->avail_min) | |
213 | wake_up(&runtime->sleep); | |
1da177e4 LT |
214 | return 0; |
215 | } | |
216 | ||
3179f620 PLB |
217 | static void update_audio_tstamp(struct snd_pcm_substream *substream, |
218 | struct timespec *curr_tstamp, | |
219 | struct timespec *audio_tstamp) | |
220 | { | |
221 | struct snd_pcm_runtime *runtime = substream->runtime; | |
222 | u64 audio_frames, audio_nsecs; | |
223 | struct timespec driver_tstamp; | |
224 | ||
225 | if (runtime->tstamp_mode != SNDRV_PCM_TSTAMP_ENABLE) | |
226 | return; | |
227 | ||
228 | if (!(substream->ops->get_time_info) || | |
229 | (runtime->audio_tstamp_report.actual_type == | |
230 | SNDRV_PCM_AUDIO_TSTAMP_TYPE_DEFAULT)) { | |
231 | ||
232 | /* | |
233 | * provide audio timestamp derived from pointer position | |
234 | * add delay only if requested | |
235 | */ | |
236 | ||
237 | audio_frames = runtime->hw_ptr_wrap + runtime->status->hw_ptr; | |
238 | ||
239 | if (runtime->audio_tstamp_config.report_delay) { | |
240 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) | |
241 | audio_frames -= runtime->delay; | |
242 | else | |
243 | audio_frames += runtime->delay; | |
244 | } | |
245 | audio_nsecs = div_u64(audio_frames * 1000000000LL, | |
246 | runtime->rate); | |
247 | *audio_tstamp = ns_to_timespec(audio_nsecs); | |
248 | } | |
249 | runtime->status->audio_tstamp = *audio_tstamp; | |
250 | runtime->status->tstamp = *curr_tstamp; | |
251 | ||
252 | /* | |
253 | * re-take a driver timestamp to let apps detect if the reference tstamp | |
254 | * read by low-level hardware was provided with a delay | |
255 | */ | |
256 | snd_pcm_gettime(substream->runtime, (struct timespec *)&driver_tstamp); | |
257 | runtime->driver_tstamp = driver_tstamp; | |
258 | } | |
259 | ||
f240406b JK |
260 | static int snd_pcm_update_hw_ptr0(struct snd_pcm_substream *substream, |
261 | unsigned int in_interrupt) | |
1da177e4 | 262 | { |
877211f5 | 263 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 | 264 | snd_pcm_uframes_t pos; |
f240406b | 265 | snd_pcm_uframes_t old_hw_ptr, new_hw_ptr, hw_base; |
bbf6ad13 JK |
266 | snd_pcm_sframes_t hdelta, delta; |
267 | unsigned long jdelta; | |
3509a03f PLB |
268 | unsigned long curr_jiffies; |
269 | struct timespec curr_tstamp; | |
4eeaaeae | 270 | struct timespec audio_tstamp; |
0e8014d7 | 271 | int crossed_boundary = 0; |
1da177e4 | 272 | |
bbf6ad13 | 273 | old_hw_ptr = runtime->status->hw_ptr; |
3509a03f PLB |
274 | |
275 | /* | |
276 | * group pointer, time and jiffies reads to allow for more | |
277 | * accurate correlations/corrections. | |
278 | * The values are stored at the end of this routine after | |
279 | * corrections for hw_ptr position | |
280 | */ | |
f240406b | 281 | pos = substream->ops->pointer(substream); |
3509a03f | 282 | curr_jiffies = jiffies; |
4eeaaeae | 283 | if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) { |
3179f620 PLB |
284 | if ((substream->ops->get_time_info) && |
285 | (runtime->audio_tstamp_config.type_requested != SNDRV_PCM_AUDIO_TSTAMP_TYPE_DEFAULT)) { | |
286 | substream->ops->get_time_info(substream, &curr_tstamp, | |
287 | &audio_tstamp, | |
288 | &runtime->audio_tstamp_config, | |
289 | &runtime->audio_tstamp_report); | |
290 | ||
291 | /* re-test in case tstamp type is not supported in hardware and was demoted to DEFAULT */ | |
292 | if (runtime->audio_tstamp_report.actual_type == SNDRV_PCM_AUDIO_TSTAMP_TYPE_DEFAULT) | |
293 | snd_pcm_gettime(runtime, (struct timespec *)&curr_tstamp); | |
294 | } else | |
295 | snd_pcm_gettime(runtime, (struct timespec *)&curr_tstamp); | |
4eeaaeae PLB |
296 | } |
297 | ||
1da177e4 LT |
298 | if (pos == SNDRV_PCM_POS_XRUN) { |
299 | xrun(substream); | |
300 | return -EPIPE; | |
301 | } | |
f240406b | 302 | if (pos >= runtime->buffer_size) { |
09e56df8 | 303 | if (printk_ratelimit()) { |
f240406b | 304 | char name[16]; |
acb03d44 | 305 | snd_pcm_debug_name(substream, name, sizeof(name)); |
09e56df8 | 306 | pcm_err(substream->pcm, |
0ab1ace8 | 307 | "invalid position: %s, pos = %ld, buffer size = %ld, period size = %ld\n", |
09e56df8 TI |
308 | name, pos, runtime->buffer_size, |
309 | runtime->period_size); | |
f240406b JK |
310 | } |
311 | pos = 0; | |
cedb8118 | 312 | } |
f240406b | 313 | pos -= pos % runtime->min_align; |
f5914908 | 314 | trace_hwptr(substream, pos, in_interrupt); |
ed3da3d9 TI |
315 | hw_base = runtime->hw_ptr_base; |
316 | new_hw_ptr = hw_base + pos; | |
f240406b JK |
317 | if (in_interrupt) { |
318 | /* we know that one period was processed */ | |
319 | /* delta = "expected next hw_ptr" for in_interrupt != 0 */ | |
e7636925 | 320 | delta = runtime->hw_ptr_interrupt + runtime->period_size; |
f240406b | 321 | if (delta > new_hw_ptr) { |
bd76af0f | 322 | /* check for double acknowledged interrupts */ |
3509a03f | 323 | hdelta = curr_jiffies - runtime->hw_ptr_jiffies; |
13a98839 | 324 | if (hdelta > runtime->hw_ptr_buffer_jiffies/2 + 1) { |
bd76af0f | 325 | hw_base += runtime->buffer_size; |
0e8014d7 | 326 | if (hw_base >= runtime->boundary) { |
bd76af0f | 327 | hw_base = 0; |
0e8014d7 PLB |
328 | crossed_boundary++; |
329 | } | |
bd76af0f JK |
330 | new_hw_ptr = hw_base + pos; |
331 | goto __delta; | |
332 | } | |
1da177e4 | 333 | } |
1da177e4 | 334 | } |
f240406b JK |
335 | /* new_hw_ptr might be lower than old_hw_ptr in case when */ |
336 | /* pointer crosses the end of the ring buffer */ | |
337 | if (new_hw_ptr < old_hw_ptr) { | |
338 | hw_base += runtime->buffer_size; | |
0e8014d7 | 339 | if (hw_base >= runtime->boundary) { |
f240406b | 340 | hw_base = 0; |
0e8014d7 PLB |
341 | crossed_boundary++; |
342 | } | |
f240406b JK |
343 | new_hw_ptr = hw_base + pos; |
344 | } | |
345 | __delta: | |
b406e610 CL |
346 | delta = new_hw_ptr - old_hw_ptr; |
347 | if (delta < 0) | |
348 | delta += runtime->boundary; | |
ab69a490 | 349 | |
59ff878f | 350 | if (runtime->no_period_wakeup) { |
12ff414e | 351 | snd_pcm_sframes_t xrun_threshold; |
59ff878f CL |
352 | /* |
353 | * Without regular period interrupts, we have to check | |
354 | * the elapsed time to detect xruns. | |
355 | */ | |
3509a03f | 356 | jdelta = curr_jiffies - runtime->hw_ptr_jiffies; |
47228e48 CL |
357 | if (jdelta < runtime->hw_ptr_buffer_jiffies / 2) |
358 | goto no_delta_check; | |
59ff878f | 359 | hdelta = jdelta - delta * HZ / runtime->rate; |
12ff414e KA |
360 | xrun_threshold = runtime->hw_ptr_buffer_jiffies / 2 + 1; |
361 | while (hdelta > xrun_threshold) { | |
59ff878f CL |
362 | delta += runtime->buffer_size; |
363 | hw_base += runtime->buffer_size; | |
0e8014d7 | 364 | if (hw_base >= runtime->boundary) { |
59ff878f | 365 | hw_base = 0; |
0e8014d7 PLB |
366 | crossed_boundary++; |
367 | } | |
59ff878f CL |
368 | new_hw_ptr = hw_base + pos; |
369 | hdelta -= runtime->hw_ptr_buffer_jiffies; | |
370 | } | |
ab69a490 | 371 | goto no_delta_check; |
59ff878f | 372 | } |
ab69a490 | 373 | |
f240406b | 374 | /* something must be really wrong */ |
7b3a177b | 375 | if (delta >= runtime->buffer_size + runtime->period_size) { |
f5914908 TI |
376 | hw_ptr_error(substream, in_interrupt, "Unexpected hw_ptr", |
377 | "(stream=%i, pos=%ld, new_hw_ptr=%ld, old_hw_ptr=%ld)\n", | |
378 | substream->stream, (long)pos, | |
379 | (long)new_hw_ptr, (long)old_hw_ptr); | |
f240406b JK |
380 | return 0; |
381 | } | |
c87d9732 TI |
382 | |
383 | /* Do jiffies check only in xrun_debug mode */ | |
741b20cf | 384 | if (!xrun_debug(substream, XRUN_DEBUG_JIFFIESCHECK)) |
c87d9732 TI |
385 | goto no_jiffies_check; |
386 | ||
3e5b5016 TI |
387 | /* Skip the jiffies check for hardwares with BATCH flag. |
388 | * Such hardware usually just increases the position at each IRQ, | |
389 | * thus it can't give any strange position. | |
390 | */ | |
391 | if (runtime->hw.info & SNDRV_PCM_INFO_BATCH) | |
392 | goto no_jiffies_check; | |
f240406b | 393 | hdelta = delta; |
a4444da3 JK |
394 | if (hdelta < runtime->delay) |
395 | goto no_jiffies_check; | |
396 | hdelta -= runtime->delay; | |
3509a03f | 397 | jdelta = curr_jiffies - runtime->hw_ptr_jiffies; |
bbf6ad13 JK |
398 | if (((hdelta * HZ) / runtime->rate) > jdelta + HZ/100) { |
399 | delta = jdelta / | |
400 | (((runtime->period_size * HZ) / runtime->rate) | |
401 | + HZ/100); | |
f240406b JK |
402 | /* move new_hw_ptr according jiffies not pos variable */ |
403 | new_hw_ptr = old_hw_ptr; | |
ed69c6a8 | 404 | hw_base = delta; |
f240406b JK |
405 | /* use loop to avoid checks for delta overflows */ |
406 | /* the delta value is small or zero in most cases */ | |
407 | while (delta > 0) { | |
408 | new_hw_ptr += runtime->period_size; | |
0e8014d7 | 409 | if (new_hw_ptr >= runtime->boundary) { |
f240406b | 410 | new_hw_ptr -= runtime->boundary; |
0e8014d7 PLB |
411 | crossed_boundary--; |
412 | } | |
f240406b JK |
413 | delta--; |
414 | } | |
415 | /* align hw_base to buffer_size */ | |
f5914908 TI |
416 | hw_ptr_error(substream, in_interrupt, "hw_ptr skipping", |
417 | "(pos=%ld, delta=%ld, period=%ld, jdelta=%lu/%lu/%lu, hw_ptr=%ld/%ld)\n", | |
bbf6ad13 JK |
418 | (long)pos, (long)hdelta, |
419 | (long)runtime->period_size, jdelta, | |
ed69c6a8 | 420 | ((hdelta * HZ) / runtime->rate), hw_base, |
f240406b JK |
421 | (unsigned long)old_hw_ptr, |
422 | (unsigned long)new_hw_ptr); | |
ed69c6a8 JK |
423 | /* reset values to proper state */ |
424 | delta = 0; | |
425 | hw_base = new_hw_ptr - (new_hw_ptr % runtime->buffer_size); | |
bbf6ad13 | 426 | } |
3e5b5016 | 427 | no_jiffies_check: |
bbf6ad13 | 428 | if (delta > runtime->period_size + runtime->period_size / 2) { |
f5914908 TI |
429 | hw_ptr_error(substream, in_interrupt, |
430 | "Lost interrupts?", | |
431 | "(stream=%i, delta=%ld, new_hw_ptr=%ld, old_hw_ptr=%ld)\n", | |
ed3da3d9 | 432 | substream->stream, (long)delta, |
f240406b JK |
433 | (long)new_hw_ptr, |
434 | (long)old_hw_ptr); | |
ed3da3d9 | 435 | } |
f240406b | 436 | |
ab69a490 | 437 | no_delta_check: |
3179f620 PLB |
438 | if (runtime->status->hw_ptr == new_hw_ptr) { |
439 | update_audio_tstamp(substream, &curr_tstamp, &audio_tstamp); | |
f240406b | 440 | return 0; |
3179f620 | 441 | } |
ab1863fc | 442 | |
1da177e4 LT |
443 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && |
444 | runtime->silence_size > 0) | |
445 | snd_pcm_playback_silence(substream, new_hw_ptr); | |
446 | ||
e7636925 | 447 | if (in_interrupt) { |
ead4046b CL |
448 | delta = new_hw_ptr - runtime->hw_ptr_interrupt; |
449 | if (delta < 0) | |
450 | delta += runtime->boundary; | |
451 | delta -= (snd_pcm_uframes_t)delta % runtime->period_size; | |
452 | runtime->hw_ptr_interrupt += delta; | |
453 | if (runtime->hw_ptr_interrupt >= runtime->boundary) | |
454 | runtime->hw_ptr_interrupt -= runtime->boundary; | |
e7636925 | 455 | } |
ed3da3d9 | 456 | runtime->hw_ptr_base = hw_base; |
1da177e4 | 457 | runtime->status->hw_ptr = new_hw_ptr; |
3509a03f | 458 | runtime->hw_ptr_jiffies = curr_jiffies; |
0e8014d7 PLB |
459 | if (crossed_boundary) { |
460 | snd_BUG_ON(crossed_boundary != 1); | |
461 | runtime->hw_ptr_wrap += runtime->boundary; | |
462 | } | |
4eeaaeae | 463 | |
3179f620 | 464 | update_audio_tstamp(substream, &curr_tstamp, &audio_tstamp); |
4eeaaeae | 465 | |
1250932e | 466 | return snd_pcm_update_state(substream, runtime); |
1da177e4 LT |
467 | } |
468 | ||
469 | /* CAUTION: call it with irq disabled */ | |
877211f5 | 470 | int snd_pcm_update_hw_ptr(struct snd_pcm_substream *substream) |
1da177e4 | 471 | { |
f240406b | 472 | return snd_pcm_update_hw_ptr0(substream, 0); |
1da177e4 LT |
473 | } |
474 | ||
475 | /** | |
476 | * snd_pcm_set_ops - set the PCM operators | |
477 | * @pcm: the pcm instance | |
478 | * @direction: stream direction, SNDRV_PCM_STREAM_XXX | |
479 | * @ops: the operator table | |
480 | * | |
481 | * Sets the given PCM operators to the pcm instance. | |
482 | */ | |
e6c2e7eb LPC |
483 | void snd_pcm_set_ops(struct snd_pcm *pcm, int direction, |
484 | const struct snd_pcm_ops *ops) | |
1da177e4 | 485 | { |
877211f5 TI |
486 | struct snd_pcm_str *stream = &pcm->streams[direction]; |
487 | struct snd_pcm_substream *substream; | |
1da177e4 LT |
488 | |
489 | for (substream = stream->substream; substream != NULL; substream = substream->next) | |
490 | substream->ops = ops; | |
491 | } | |
492 | ||
e88e8ae6 | 493 | EXPORT_SYMBOL(snd_pcm_set_ops); |
1da177e4 LT |
494 | |
495 | /** | |
496 | * snd_pcm_sync - set the PCM sync id | |
497 | * @substream: the pcm substream | |
498 | * | |
499 | * Sets the PCM sync identifier for the card. | |
500 | */ | |
877211f5 | 501 | void snd_pcm_set_sync(struct snd_pcm_substream *substream) |
1da177e4 | 502 | { |
877211f5 | 503 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
504 | |
505 | runtime->sync.id32[0] = substream->pcm->card->number; | |
506 | runtime->sync.id32[1] = -1; | |
507 | runtime->sync.id32[2] = -1; | |
508 | runtime->sync.id32[3] = -1; | |
509 | } | |
510 | ||
e88e8ae6 TI |
511 | EXPORT_SYMBOL(snd_pcm_set_sync); |
512 | ||
1da177e4 LT |
513 | /* |
514 | * Standard ioctl routine | |
515 | */ | |
516 | ||
1da177e4 LT |
517 | static inline unsigned int div32(unsigned int a, unsigned int b, |
518 | unsigned int *r) | |
519 | { | |
520 | if (b == 0) { | |
521 | *r = 0; | |
522 | return UINT_MAX; | |
523 | } | |
524 | *r = a % b; | |
525 | return a / b; | |
526 | } | |
527 | ||
528 | static inline unsigned int div_down(unsigned int a, unsigned int b) | |
529 | { | |
530 | if (b == 0) | |
531 | return UINT_MAX; | |
532 | return a / b; | |
533 | } | |
534 | ||
535 | static inline unsigned int div_up(unsigned int a, unsigned int b) | |
536 | { | |
537 | unsigned int r; | |
538 | unsigned int q; | |
539 | if (b == 0) | |
540 | return UINT_MAX; | |
541 | q = div32(a, b, &r); | |
542 | if (r) | |
543 | ++q; | |
544 | return q; | |
545 | } | |
546 | ||
547 | static inline unsigned int mul(unsigned int a, unsigned int b) | |
548 | { | |
549 | if (a == 0) | |
550 | return 0; | |
551 | if (div_down(UINT_MAX, a) < b) | |
552 | return UINT_MAX; | |
553 | return a * b; | |
554 | } | |
555 | ||
556 | static inline unsigned int muldiv32(unsigned int a, unsigned int b, | |
557 | unsigned int c, unsigned int *r) | |
558 | { | |
559 | u_int64_t n = (u_int64_t) a * b; | |
560 | if (c == 0) { | |
7eaa943c | 561 | snd_BUG_ON(!n); |
1da177e4 LT |
562 | *r = 0; |
563 | return UINT_MAX; | |
564 | } | |
3f7440a6 | 565 | n = div_u64_rem(n, c, r); |
1da177e4 LT |
566 | if (n >= UINT_MAX) { |
567 | *r = 0; | |
568 | return UINT_MAX; | |
569 | } | |
570 | return n; | |
571 | } | |
572 | ||
1da177e4 LT |
573 | /** |
574 | * snd_interval_refine - refine the interval value of configurator | |
575 | * @i: the interval value to refine | |
576 | * @v: the interval value to refer to | |
577 | * | |
578 | * Refines the interval value with the reference value. | |
579 | * The interval is changed to the range satisfying both intervals. | |
580 | * The interval status (min, max, integer, etc.) are evaluated. | |
581 | * | |
eb7c06e8 YB |
582 | * Return: Positive if the value is changed, zero if it's not changed, or a |
583 | * negative error code. | |
1da177e4 | 584 | */ |
877211f5 | 585 | int snd_interval_refine(struct snd_interval *i, const struct snd_interval *v) |
1da177e4 LT |
586 | { |
587 | int changed = 0; | |
7eaa943c TI |
588 | if (snd_BUG_ON(snd_interval_empty(i))) |
589 | return -EINVAL; | |
1da177e4 LT |
590 | if (i->min < v->min) { |
591 | i->min = v->min; | |
592 | i->openmin = v->openmin; | |
593 | changed = 1; | |
594 | } else if (i->min == v->min && !i->openmin && v->openmin) { | |
595 | i->openmin = 1; | |
596 | changed = 1; | |
597 | } | |
598 | if (i->max > v->max) { | |
599 | i->max = v->max; | |
600 | i->openmax = v->openmax; | |
601 | changed = 1; | |
602 | } else if (i->max == v->max && !i->openmax && v->openmax) { | |
603 | i->openmax = 1; | |
604 | changed = 1; | |
605 | } | |
606 | if (!i->integer && v->integer) { | |
607 | i->integer = 1; | |
608 | changed = 1; | |
609 | } | |
610 | if (i->integer) { | |
611 | if (i->openmin) { | |
612 | i->min++; | |
613 | i->openmin = 0; | |
614 | } | |
615 | if (i->openmax) { | |
616 | i->max--; | |
617 | i->openmax = 0; | |
618 | } | |
619 | } else if (!i->openmin && !i->openmax && i->min == i->max) | |
620 | i->integer = 1; | |
621 | if (snd_interval_checkempty(i)) { | |
622 | snd_interval_none(i); | |
623 | return -EINVAL; | |
624 | } | |
625 | return changed; | |
626 | } | |
627 | ||
e88e8ae6 TI |
628 | EXPORT_SYMBOL(snd_interval_refine); |
629 | ||
877211f5 | 630 | static int snd_interval_refine_first(struct snd_interval *i) |
1da177e4 | 631 | { |
7eaa943c TI |
632 | if (snd_BUG_ON(snd_interval_empty(i))) |
633 | return -EINVAL; | |
1da177e4 LT |
634 | if (snd_interval_single(i)) |
635 | return 0; | |
636 | i->max = i->min; | |
637 | i->openmax = i->openmin; | |
638 | if (i->openmax) | |
639 | i->max++; | |
640 | return 1; | |
641 | } | |
642 | ||
877211f5 | 643 | static int snd_interval_refine_last(struct snd_interval *i) |
1da177e4 | 644 | { |
7eaa943c TI |
645 | if (snd_BUG_ON(snd_interval_empty(i))) |
646 | return -EINVAL; | |
1da177e4 LT |
647 | if (snd_interval_single(i)) |
648 | return 0; | |
649 | i->min = i->max; | |
650 | i->openmin = i->openmax; | |
651 | if (i->openmin) | |
652 | i->min--; | |
653 | return 1; | |
654 | } | |
655 | ||
877211f5 | 656 | void snd_interval_mul(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c) |
1da177e4 LT |
657 | { |
658 | if (a->empty || b->empty) { | |
659 | snd_interval_none(c); | |
660 | return; | |
661 | } | |
662 | c->empty = 0; | |
663 | c->min = mul(a->min, b->min); | |
664 | c->openmin = (a->openmin || b->openmin); | |
665 | c->max = mul(a->max, b->max); | |
666 | c->openmax = (a->openmax || b->openmax); | |
667 | c->integer = (a->integer && b->integer); | |
668 | } | |
669 | ||
670 | /** | |
671 | * snd_interval_div - refine the interval value with division | |
df8db936 TI |
672 | * @a: dividend |
673 | * @b: divisor | |
674 | * @c: quotient | |
1da177e4 LT |
675 | * |
676 | * c = a / b | |
677 | * | |
678 | * Returns non-zero if the value is changed, zero if not changed. | |
679 | */ | |
877211f5 | 680 | void snd_interval_div(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c) |
1da177e4 LT |
681 | { |
682 | unsigned int r; | |
683 | if (a->empty || b->empty) { | |
684 | snd_interval_none(c); | |
685 | return; | |
686 | } | |
687 | c->empty = 0; | |
688 | c->min = div32(a->min, b->max, &r); | |
689 | c->openmin = (r || a->openmin || b->openmax); | |
690 | if (b->min > 0) { | |
691 | c->max = div32(a->max, b->min, &r); | |
692 | if (r) { | |
693 | c->max++; | |
694 | c->openmax = 1; | |
695 | } else | |
696 | c->openmax = (a->openmax || b->openmin); | |
697 | } else { | |
698 | c->max = UINT_MAX; | |
699 | c->openmax = 0; | |
700 | } | |
701 | c->integer = 0; | |
702 | } | |
703 | ||
704 | /** | |
705 | * snd_interval_muldivk - refine the interval value | |
df8db936 TI |
706 | * @a: dividend 1 |
707 | * @b: dividend 2 | |
708 | * @k: divisor (as integer) | |
709 | * @c: result | |
710 | * | |
1da177e4 LT |
711 | * c = a * b / k |
712 | * | |
713 | * Returns non-zero if the value is changed, zero if not changed. | |
714 | */ | |
877211f5 TI |
715 | void snd_interval_muldivk(const struct snd_interval *a, const struct snd_interval *b, |
716 | unsigned int k, struct snd_interval *c) | |
1da177e4 LT |
717 | { |
718 | unsigned int r; | |
719 | if (a->empty || b->empty) { | |
720 | snd_interval_none(c); | |
721 | return; | |
722 | } | |
723 | c->empty = 0; | |
724 | c->min = muldiv32(a->min, b->min, k, &r); | |
725 | c->openmin = (r || a->openmin || b->openmin); | |
726 | c->max = muldiv32(a->max, b->max, k, &r); | |
727 | if (r) { | |
728 | c->max++; | |
729 | c->openmax = 1; | |
730 | } else | |
731 | c->openmax = (a->openmax || b->openmax); | |
732 | c->integer = 0; | |
733 | } | |
734 | ||
735 | /** | |
736 | * snd_interval_mulkdiv - refine the interval value | |
df8db936 TI |
737 | * @a: dividend 1 |
738 | * @k: dividend 2 (as integer) | |
739 | * @b: divisor | |
740 | * @c: result | |
1da177e4 LT |
741 | * |
742 | * c = a * k / b | |
743 | * | |
744 | * Returns non-zero if the value is changed, zero if not changed. | |
745 | */ | |
877211f5 TI |
746 | void snd_interval_mulkdiv(const struct snd_interval *a, unsigned int k, |
747 | const struct snd_interval *b, struct snd_interval *c) | |
1da177e4 LT |
748 | { |
749 | unsigned int r; | |
750 | if (a->empty || b->empty) { | |
751 | snd_interval_none(c); | |
752 | return; | |
753 | } | |
754 | c->empty = 0; | |
755 | c->min = muldiv32(a->min, k, b->max, &r); | |
756 | c->openmin = (r || a->openmin || b->openmax); | |
757 | if (b->min > 0) { | |
758 | c->max = muldiv32(a->max, k, b->min, &r); | |
759 | if (r) { | |
760 | c->max++; | |
761 | c->openmax = 1; | |
762 | } else | |
763 | c->openmax = (a->openmax || b->openmin); | |
764 | } else { | |
765 | c->max = UINT_MAX; | |
766 | c->openmax = 0; | |
767 | } | |
768 | c->integer = 0; | |
769 | } | |
770 | ||
1da177e4 LT |
771 | /* ---- */ |
772 | ||
773 | ||
774 | /** | |
775 | * snd_interval_ratnum - refine the interval value | |
df8db936 TI |
776 | * @i: interval to refine |
777 | * @rats_count: number of ratnum_t | |
778 | * @rats: ratnum_t array | |
779 | * @nump: pointer to store the resultant numerator | |
780 | * @denp: pointer to store the resultant denominator | |
1da177e4 | 781 | * |
eb7c06e8 YB |
782 | * Return: Positive if the value is changed, zero if it's not changed, or a |
783 | * negative error code. | |
1da177e4 | 784 | */ |
877211f5 | 785 | int snd_interval_ratnum(struct snd_interval *i, |
e5e113cf | 786 | unsigned int rats_count, const struct snd_ratnum *rats, |
877211f5 | 787 | unsigned int *nump, unsigned int *denp) |
1da177e4 | 788 | { |
8374e24c KH |
789 | unsigned int best_num, best_den; |
790 | int best_diff; | |
1da177e4 | 791 | unsigned int k; |
877211f5 | 792 | struct snd_interval t; |
1da177e4 | 793 | int err; |
8374e24c KH |
794 | unsigned int result_num, result_den; |
795 | int result_diff; | |
1da177e4 LT |
796 | |
797 | best_num = best_den = best_diff = 0; | |
798 | for (k = 0; k < rats_count; ++k) { | |
799 | unsigned int num = rats[k].num; | |
800 | unsigned int den; | |
801 | unsigned int q = i->min; | |
802 | int diff; | |
803 | if (q == 0) | |
804 | q = 1; | |
40962d7c | 805 | den = div_up(num, q); |
1da177e4 LT |
806 | if (den < rats[k].den_min) |
807 | continue; | |
808 | if (den > rats[k].den_max) | |
809 | den = rats[k].den_max; | |
810 | else { | |
811 | unsigned int r; | |
812 | r = (den - rats[k].den_min) % rats[k].den_step; | |
813 | if (r != 0) | |
814 | den -= r; | |
815 | } | |
816 | diff = num - q * den; | |
8374e24c KH |
817 | if (diff < 0) |
818 | diff = -diff; | |
1da177e4 LT |
819 | if (best_num == 0 || |
820 | diff * best_den < best_diff * den) { | |
821 | best_diff = diff; | |
822 | best_den = den; | |
823 | best_num = num; | |
824 | } | |
825 | } | |
826 | if (best_den == 0) { | |
827 | i->empty = 1; | |
828 | return -EINVAL; | |
829 | } | |
830 | t.min = div_down(best_num, best_den); | |
831 | t.openmin = !!(best_num % best_den); | |
832 | ||
8374e24c KH |
833 | result_num = best_num; |
834 | result_diff = best_diff; | |
835 | result_den = best_den; | |
1da177e4 LT |
836 | best_num = best_den = best_diff = 0; |
837 | for (k = 0; k < rats_count; ++k) { | |
838 | unsigned int num = rats[k].num; | |
839 | unsigned int den; | |
840 | unsigned int q = i->max; | |
841 | int diff; | |
842 | if (q == 0) { | |
843 | i->empty = 1; | |
844 | return -EINVAL; | |
845 | } | |
40962d7c | 846 | den = div_down(num, q); |
1da177e4 LT |
847 | if (den > rats[k].den_max) |
848 | continue; | |
849 | if (den < rats[k].den_min) | |
850 | den = rats[k].den_min; | |
851 | else { | |
852 | unsigned int r; | |
853 | r = (den - rats[k].den_min) % rats[k].den_step; | |
854 | if (r != 0) | |
855 | den += rats[k].den_step - r; | |
856 | } | |
857 | diff = q * den - num; | |
8374e24c KH |
858 | if (diff < 0) |
859 | diff = -diff; | |
1da177e4 LT |
860 | if (best_num == 0 || |
861 | diff * best_den < best_diff * den) { | |
862 | best_diff = diff; | |
863 | best_den = den; | |
864 | best_num = num; | |
865 | } | |
866 | } | |
867 | if (best_den == 0) { | |
868 | i->empty = 1; | |
869 | return -EINVAL; | |
870 | } | |
871 | t.max = div_up(best_num, best_den); | |
872 | t.openmax = !!(best_num % best_den); | |
873 | t.integer = 0; | |
874 | err = snd_interval_refine(i, &t); | |
875 | if (err < 0) | |
876 | return err; | |
877 | ||
878 | if (snd_interval_single(i)) { | |
8374e24c KH |
879 | if (best_diff * result_den < result_diff * best_den) { |
880 | result_num = best_num; | |
881 | result_den = best_den; | |
882 | } | |
1da177e4 | 883 | if (nump) |
8374e24c | 884 | *nump = result_num; |
1da177e4 | 885 | if (denp) |
8374e24c | 886 | *denp = result_den; |
1da177e4 LT |
887 | } |
888 | return err; | |
889 | } | |
890 | ||
e88e8ae6 TI |
891 | EXPORT_SYMBOL(snd_interval_ratnum); |
892 | ||
1da177e4 LT |
893 | /** |
894 | * snd_interval_ratden - refine the interval value | |
df8db936 | 895 | * @i: interval to refine |
877211f5 TI |
896 | * @rats_count: number of struct ratden |
897 | * @rats: struct ratden array | |
df8db936 TI |
898 | * @nump: pointer to store the resultant numerator |
899 | * @denp: pointer to store the resultant denominator | |
1da177e4 | 900 | * |
eb7c06e8 YB |
901 | * Return: Positive if the value is changed, zero if it's not changed, or a |
902 | * negative error code. | |
1da177e4 | 903 | */ |
877211f5 | 904 | static int snd_interval_ratden(struct snd_interval *i, |
e5e113cf LPC |
905 | unsigned int rats_count, |
906 | const struct snd_ratden *rats, | |
1da177e4 LT |
907 | unsigned int *nump, unsigned int *denp) |
908 | { | |
909 | unsigned int best_num, best_diff, best_den; | |
910 | unsigned int k; | |
877211f5 | 911 | struct snd_interval t; |
1da177e4 LT |
912 | int err; |
913 | ||
914 | best_num = best_den = best_diff = 0; | |
915 | for (k = 0; k < rats_count; ++k) { | |
916 | unsigned int num; | |
917 | unsigned int den = rats[k].den; | |
918 | unsigned int q = i->min; | |
919 | int diff; | |
920 | num = mul(q, den); | |
921 | if (num > rats[k].num_max) | |
922 | continue; | |
923 | if (num < rats[k].num_min) | |
924 | num = rats[k].num_max; | |
925 | else { | |
926 | unsigned int r; | |
927 | r = (num - rats[k].num_min) % rats[k].num_step; | |
928 | if (r != 0) | |
929 | num += rats[k].num_step - r; | |
930 | } | |
931 | diff = num - q * den; | |
932 | if (best_num == 0 || | |
933 | diff * best_den < best_diff * den) { | |
934 | best_diff = diff; | |
935 | best_den = den; | |
936 | best_num = num; | |
937 | } | |
938 | } | |
939 | if (best_den == 0) { | |
940 | i->empty = 1; | |
941 | return -EINVAL; | |
942 | } | |
943 | t.min = div_down(best_num, best_den); | |
944 | t.openmin = !!(best_num % best_den); | |
945 | ||
946 | best_num = best_den = best_diff = 0; | |
947 | for (k = 0; k < rats_count; ++k) { | |
948 | unsigned int num; | |
949 | unsigned int den = rats[k].den; | |
950 | unsigned int q = i->max; | |
951 | int diff; | |
952 | num = mul(q, den); | |
953 | if (num < rats[k].num_min) | |
954 | continue; | |
955 | if (num > rats[k].num_max) | |
956 | num = rats[k].num_max; | |
957 | else { | |
958 | unsigned int r; | |
959 | r = (num - rats[k].num_min) % rats[k].num_step; | |
960 | if (r != 0) | |
961 | num -= r; | |
962 | } | |
963 | diff = q * den - num; | |
964 | if (best_num == 0 || | |
965 | diff * best_den < best_diff * den) { | |
966 | best_diff = diff; | |
967 | best_den = den; | |
968 | best_num = num; | |
969 | } | |
970 | } | |
971 | if (best_den == 0) { | |
972 | i->empty = 1; | |
973 | return -EINVAL; | |
974 | } | |
975 | t.max = div_up(best_num, best_den); | |
976 | t.openmax = !!(best_num % best_den); | |
977 | t.integer = 0; | |
978 | err = snd_interval_refine(i, &t); | |
979 | if (err < 0) | |
980 | return err; | |
981 | ||
982 | if (snd_interval_single(i)) { | |
983 | if (nump) | |
984 | *nump = best_num; | |
985 | if (denp) | |
986 | *denp = best_den; | |
987 | } | |
988 | return err; | |
989 | } | |
990 | ||
991 | /** | |
992 | * snd_interval_list - refine the interval value from the list | |
993 | * @i: the interval value to refine | |
994 | * @count: the number of elements in the list | |
995 | * @list: the value list | |
996 | * @mask: the bit-mask to evaluate | |
997 | * | |
998 | * Refines the interval value from the list. | |
999 | * When mask is non-zero, only the elements corresponding to bit 1 are | |
1000 | * evaluated. | |
1001 | * | |
eb7c06e8 YB |
1002 | * Return: Positive if the value is changed, zero if it's not changed, or a |
1003 | * negative error code. | |
1da177e4 | 1004 | */ |
4af87a93 MB |
1005 | int snd_interval_list(struct snd_interval *i, unsigned int count, |
1006 | const unsigned int *list, unsigned int mask) | |
1da177e4 LT |
1007 | { |
1008 | unsigned int k; | |
b1ddaf68 | 1009 | struct snd_interval list_range; |
0981a260 TI |
1010 | |
1011 | if (!count) { | |
1012 | i->empty = 1; | |
1013 | return -EINVAL; | |
1014 | } | |
b1ddaf68 CL |
1015 | snd_interval_any(&list_range); |
1016 | list_range.min = UINT_MAX; | |
1017 | list_range.max = 0; | |
1da177e4 LT |
1018 | for (k = 0; k < count; k++) { |
1019 | if (mask && !(mask & (1 << k))) | |
1020 | continue; | |
b1ddaf68 | 1021 | if (!snd_interval_test(i, list[k])) |
1da177e4 | 1022 | continue; |
b1ddaf68 CL |
1023 | list_range.min = min(list_range.min, list[k]); |
1024 | list_range.max = max(list_range.max, list[k]); | |
1da177e4 | 1025 | } |
b1ddaf68 | 1026 | return snd_interval_refine(i, &list_range); |
1da177e4 LT |
1027 | } |
1028 | ||
e88e8ae6 TI |
1029 | EXPORT_SYMBOL(snd_interval_list); |
1030 | ||
f66f898e PR |
1031 | /** |
1032 | * snd_interval_ranges - refine the interval value from the list of ranges | |
1033 | * @i: the interval value to refine | |
1034 | * @count: the number of elements in the list of ranges | |
1035 | * @ranges: the ranges list | |
1036 | * @mask: the bit-mask to evaluate | |
1037 | * | |
1038 | * Refines the interval value from the list of ranges. | |
1039 | * When mask is non-zero, only the elements corresponding to bit 1 are | |
1040 | * evaluated. | |
1041 | * | |
1042 | * Return: Positive if the value is changed, zero if it's not changed, or a | |
1043 | * negative error code. | |
1044 | */ | |
1045 | int snd_interval_ranges(struct snd_interval *i, unsigned int count, | |
1046 | const struct snd_interval *ranges, unsigned int mask) | |
1047 | { | |
1048 | unsigned int k; | |
1049 | struct snd_interval range_union; | |
1050 | struct snd_interval range; | |
1051 | ||
1052 | if (!count) { | |
1053 | snd_interval_none(i); | |
1054 | return -EINVAL; | |
1055 | } | |
1056 | snd_interval_any(&range_union); | |
1057 | range_union.min = UINT_MAX; | |
1058 | range_union.max = 0; | |
1059 | for (k = 0; k < count; k++) { | |
1060 | if (mask && !(mask & (1 << k))) | |
1061 | continue; | |
1062 | snd_interval_copy(&range, &ranges[k]); | |
1063 | if (snd_interval_refine(&range, i) < 0) | |
1064 | continue; | |
1065 | if (snd_interval_empty(&range)) | |
1066 | continue; | |
1067 | ||
1068 | if (range.min < range_union.min) { | |
1069 | range_union.min = range.min; | |
1070 | range_union.openmin = 1; | |
1071 | } | |
1072 | if (range.min == range_union.min && !range.openmin) | |
1073 | range_union.openmin = 0; | |
1074 | if (range.max > range_union.max) { | |
1075 | range_union.max = range.max; | |
1076 | range_union.openmax = 1; | |
1077 | } | |
1078 | if (range.max == range_union.max && !range.openmax) | |
1079 | range_union.openmax = 0; | |
1080 | } | |
1081 | return snd_interval_refine(i, &range_union); | |
1082 | } | |
1083 | EXPORT_SYMBOL(snd_interval_ranges); | |
1084 | ||
0f519b62 | 1085 | static int snd_interval_step(struct snd_interval *i, unsigned int step) |
1da177e4 LT |
1086 | { |
1087 | unsigned int n; | |
1088 | int changed = 0; | |
0f519b62 | 1089 | n = i->min % step; |
1da177e4 LT |
1090 | if (n != 0 || i->openmin) { |
1091 | i->min += step - n; | |
df1e4719 | 1092 | i->openmin = 0; |
1da177e4 LT |
1093 | changed = 1; |
1094 | } | |
0f519b62 | 1095 | n = i->max % step; |
1da177e4 LT |
1096 | if (n != 0 || i->openmax) { |
1097 | i->max -= n; | |
df1e4719 | 1098 | i->openmax = 0; |
1da177e4 LT |
1099 | changed = 1; |
1100 | } | |
1101 | if (snd_interval_checkempty(i)) { | |
1102 | i->empty = 1; | |
1103 | return -EINVAL; | |
1104 | } | |
1105 | return changed; | |
1106 | } | |
1107 | ||
1108 | /* Info constraints helpers */ | |
1109 | ||
1110 | /** | |
1111 | * snd_pcm_hw_rule_add - add the hw-constraint rule | |
1112 | * @runtime: the pcm runtime instance | |
1113 | * @cond: condition bits | |
1114 | * @var: the variable to evaluate | |
1115 | * @func: the evaluation function | |
1116 | * @private: the private data pointer passed to function | |
1117 | * @dep: the dependent variables | |
1118 | * | |
eb7c06e8 | 1119 | * Return: Zero if successful, or a negative error code on failure. |
1da177e4 | 1120 | */ |
877211f5 | 1121 | int snd_pcm_hw_rule_add(struct snd_pcm_runtime *runtime, unsigned int cond, |
1da177e4 LT |
1122 | int var, |
1123 | snd_pcm_hw_rule_func_t func, void *private, | |
1124 | int dep, ...) | |
1125 | { | |
877211f5 TI |
1126 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; |
1127 | struct snd_pcm_hw_rule *c; | |
1da177e4 LT |
1128 | unsigned int k; |
1129 | va_list args; | |
1130 | va_start(args, dep); | |
1131 | if (constrs->rules_num >= constrs->rules_all) { | |
877211f5 | 1132 | struct snd_pcm_hw_rule *new; |
1da177e4 LT |
1133 | unsigned int new_rules = constrs->rules_all + 16; |
1134 | new = kcalloc(new_rules, sizeof(*c), GFP_KERNEL); | |
87a1c8aa JJ |
1135 | if (!new) { |
1136 | va_end(args); | |
1da177e4 | 1137 | return -ENOMEM; |
87a1c8aa | 1138 | } |
1da177e4 LT |
1139 | if (constrs->rules) { |
1140 | memcpy(new, constrs->rules, | |
1141 | constrs->rules_num * sizeof(*c)); | |
1142 | kfree(constrs->rules); | |
1143 | } | |
1144 | constrs->rules = new; | |
1145 | constrs->rules_all = new_rules; | |
1146 | } | |
1147 | c = &constrs->rules[constrs->rules_num]; | |
1148 | c->cond = cond; | |
1149 | c->func = func; | |
1150 | c->var = var; | |
1151 | c->private = private; | |
1152 | k = 0; | |
1153 | while (1) { | |
87a1c8aa JJ |
1154 | if (snd_BUG_ON(k >= ARRAY_SIZE(c->deps))) { |
1155 | va_end(args); | |
7eaa943c | 1156 | return -EINVAL; |
87a1c8aa | 1157 | } |
1da177e4 LT |
1158 | c->deps[k++] = dep; |
1159 | if (dep < 0) | |
1160 | break; | |
1161 | dep = va_arg(args, int); | |
1162 | } | |
1163 | constrs->rules_num++; | |
1164 | va_end(args); | |
1165 | return 0; | |
87a1c8aa | 1166 | } |
1da177e4 | 1167 | |
e88e8ae6 TI |
1168 | EXPORT_SYMBOL(snd_pcm_hw_rule_add); |
1169 | ||
1da177e4 | 1170 | /** |
1c85cc64 | 1171 | * snd_pcm_hw_constraint_mask - apply the given bitmap mask constraint |
df8db936 TI |
1172 | * @runtime: PCM runtime instance |
1173 | * @var: hw_params variable to apply the mask | |
1174 | * @mask: the bitmap mask | |
1175 | * | |
1c85cc64 | 1176 | * Apply the constraint of the given bitmap mask to a 32-bit mask parameter. |
eb7c06e8 YB |
1177 | * |
1178 | * Return: Zero if successful, or a negative error code on failure. | |
1da177e4 | 1179 | */ |
877211f5 | 1180 | int snd_pcm_hw_constraint_mask(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, |
1da177e4 LT |
1181 | u_int32_t mask) |
1182 | { | |
877211f5 TI |
1183 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; |
1184 | struct snd_mask *maskp = constrs_mask(constrs, var); | |
1da177e4 LT |
1185 | *maskp->bits &= mask; |
1186 | memset(maskp->bits + 1, 0, (SNDRV_MASK_MAX-32) / 8); /* clear rest */ | |
1187 | if (*maskp->bits == 0) | |
1188 | return -EINVAL; | |
1189 | return 0; | |
1190 | } | |
1191 | ||
1192 | /** | |
1c85cc64 | 1193 | * snd_pcm_hw_constraint_mask64 - apply the given bitmap mask constraint |
df8db936 TI |
1194 | * @runtime: PCM runtime instance |
1195 | * @var: hw_params variable to apply the mask | |
1196 | * @mask: the 64bit bitmap mask | |
1197 | * | |
1c85cc64 | 1198 | * Apply the constraint of the given bitmap mask to a 64-bit mask parameter. |
eb7c06e8 YB |
1199 | * |
1200 | * Return: Zero if successful, or a negative error code on failure. | |
1da177e4 | 1201 | */ |
877211f5 | 1202 | int snd_pcm_hw_constraint_mask64(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, |
1da177e4 LT |
1203 | u_int64_t mask) |
1204 | { | |
877211f5 TI |
1205 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; |
1206 | struct snd_mask *maskp = constrs_mask(constrs, var); | |
1da177e4 LT |
1207 | maskp->bits[0] &= (u_int32_t)mask; |
1208 | maskp->bits[1] &= (u_int32_t)(mask >> 32); | |
1209 | memset(maskp->bits + 2, 0, (SNDRV_MASK_MAX-64) / 8); /* clear rest */ | |
1210 | if (! maskp->bits[0] && ! maskp->bits[1]) | |
1211 | return -EINVAL; | |
1212 | return 0; | |
1213 | } | |
63a5d4c6 | 1214 | EXPORT_SYMBOL(snd_pcm_hw_constraint_mask64); |
1da177e4 LT |
1215 | |
1216 | /** | |
1c85cc64 | 1217 | * snd_pcm_hw_constraint_integer - apply an integer constraint to an interval |
df8db936 TI |
1218 | * @runtime: PCM runtime instance |
1219 | * @var: hw_params variable to apply the integer constraint | |
1220 | * | |
1221 | * Apply the constraint of integer to an interval parameter. | |
eb7c06e8 YB |
1222 | * |
1223 | * Return: Positive if the value is changed, zero if it's not changed, or a | |
1224 | * negative error code. | |
1da177e4 | 1225 | */ |
877211f5 | 1226 | int snd_pcm_hw_constraint_integer(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var) |
1da177e4 | 1227 | { |
877211f5 | 1228 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; |
1da177e4 LT |
1229 | return snd_interval_setinteger(constrs_interval(constrs, var)); |
1230 | } | |
1231 | ||
e88e8ae6 TI |
1232 | EXPORT_SYMBOL(snd_pcm_hw_constraint_integer); |
1233 | ||
1da177e4 | 1234 | /** |
1c85cc64 | 1235 | * snd_pcm_hw_constraint_minmax - apply a min/max range constraint to an interval |
df8db936 TI |
1236 | * @runtime: PCM runtime instance |
1237 | * @var: hw_params variable to apply the range | |
1238 | * @min: the minimal value | |
1239 | * @max: the maximal value | |
1240 | * | |
1241 | * Apply the min/max range constraint to an interval parameter. | |
eb7c06e8 YB |
1242 | * |
1243 | * Return: Positive if the value is changed, zero if it's not changed, or a | |
1244 | * negative error code. | |
1da177e4 | 1245 | */ |
877211f5 | 1246 | int snd_pcm_hw_constraint_minmax(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, |
1da177e4 LT |
1247 | unsigned int min, unsigned int max) |
1248 | { | |
877211f5 TI |
1249 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; |
1250 | struct snd_interval t; | |
1da177e4 LT |
1251 | t.min = min; |
1252 | t.max = max; | |
1253 | t.openmin = t.openmax = 0; | |
1254 | t.integer = 0; | |
1255 | return snd_interval_refine(constrs_interval(constrs, var), &t); | |
1256 | } | |
1257 | ||
e88e8ae6 TI |
1258 | EXPORT_SYMBOL(snd_pcm_hw_constraint_minmax); |
1259 | ||
877211f5 TI |
1260 | static int snd_pcm_hw_rule_list(struct snd_pcm_hw_params *params, |
1261 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 1262 | { |
877211f5 | 1263 | struct snd_pcm_hw_constraint_list *list = rule->private; |
1da177e4 LT |
1264 | return snd_interval_list(hw_param_interval(params, rule->var), list->count, list->list, list->mask); |
1265 | } | |
1266 | ||
1267 | ||
1268 | /** | |
1c85cc64 | 1269 | * snd_pcm_hw_constraint_list - apply a list of constraints to a parameter |
df8db936 TI |
1270 | * @runtime: PCM runtime instance |
1271 | * @cond: condition bits | |
1272 | * @var: hw_params variable to apply the list constraint | |
1273 | * @l: list | |
1274 | * | |
1275 | * Apply the list of constraints to an interval parameter. | |
eb7c06e8 YB |
1276 | * |
1277 | * Return: Zero if successful, or a negative error code on failure. | |
1da177e4 | 1278 | */ |
877211f5 | 1279 | int snd_pcm_hw_constraint_list(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1280 | unsigned int cond, |
1281 | snd_pcm_hw_param_t var, | |
1464189f | 1282 | const struct snd_pcm_hw_constraint_list *l) |
1da177e4 LT |
1283 | { |
1284 | return snd_pcm_hw_rule_add(runtime, cond, var, | |
1464189f | 1285 | snd_pcm_hw_rule_list, (void *)l, |
1da177e4 LT |
1286 | var, -1); |
1287 | } | |
1288 | ||
e88e8ae6 TI |
1289 | EXPORT_SYMBOL(snd_pcm_hw_constraint_list); |
1290 | ||
f66f898e PR |
1291 | static int snd_pcm_hw_rule_ranges(struct snd_pcm_hw_params *params, |
1292 | struct snd_pcm_hw_rule *rule) | |
1293 | { | |
1294 | struct snd_pcm_hw_constraint_ranges *r = rule->private; | |
1295 | return snd_interval_ranges(hw_param_interval(params, rule->var), | |
1296 | r->count, r->ranges, r->mask); | |
1297 | } | |
1298 | ||
1299 | ||
1300 | /** | |
1301 | * snd_pcm_hw_constraint_ranges - apply list of range constraints to a parameter | |
1302 | * @runtime: PCM runtime instance | |
1303 | * @cond: condition bits | |
1304 | * @var: hw_params variable to apply the list of range constraints | |
1305 | * @r: ranges | |
1306 | * | |
1307 | * Apply the list of range constraints to an interval parameter. | |
1308 | * | |
1309 | * Return: Zero if successful, or a negative error code on failure. | |
1310 | */ | |
1311 | int snd_pcm_hw_constraint_ranges(struct snd_pcm_runtime *runtime, | |
1312 | unsigned int cond, | |
1313 | snd_pcm_hw_param_t var, | |
1314 | const struct snd_pcm_hw_constraint_ranges *r) | |
1315 | { | |
1316 | return snd_pcm_hw_rule_add(runtime, cond, var, | |
1317 | snd_pcm_hw_rule_ranges, (void *)r, | |
1318 | var, -1); | |
1319 | } | |
1320 | EXPORT_SYMBOL(snd_pcm_hw_constraint_ranges); | |
1321 | ||
877211f5 TI |
1322 | static int snd_pcm_hw_rule_ratnums(struct snd_pcm_hw_params *params, |
1323 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 1324 | { |
e5e113cf | 1325 | const struct snd_pcm_hw_constraint_ratnums *r = rule->private; |
1da177e4 LT |
1326 | unsigned int num = 0, den = 0; |
1327 | int err; | |
1328 | err = snd_interval_ratnum(hw_param_interval(params, rule->var), | |
1329 | r->nrats, r->rats, &num, &den); | |
1330 | if (err >= 0 && den && rule->var == SNDRV_PCM_HW_PARAM_RATE) { | |
1331 | params->rate_num = num; | |
1332 | params->rate_den = den; | |
1333 | } | |
1334 | return err; | |
1335 | } | |
1336 | ||
1337 | /** | |
1c85cc64 | 1338 | * snd_pcm_hw_constraint_ratnums - apply ratnums constraint to a parameter |
df8db936 TI |
1339 | * @runtime: PCM runtime instance |
1340 | * @cond: condition bits | |
1341 | * @var: hw_params variable to apply the ratnums constraint | |
877211f5 | 1342 | * @r: struct snd_ratnums constriants |
eb7c06e8 YB |
1343 | * |
1344 | * Return: Zero if successful, or a negative error code on failure. | |
1da177e4 | 1345 | */ |
877211f5 | 1346 | int snd_pcm_hw_constraint_ratnums(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1347 | unsigned int cond, |
1348 | snd_pcm_hw_param_t var, | |
e5e113cf | 1349 | const struct snd_pcm_hw_constraint_ratnums *r) |
1da177e4 LT |
1350 | { |
1351 | return snd_pcm_hw_rule_add(runtime, cond, var, | |
e5e113cf | 1352 | snd_pcm_hw_rule_ratnums, (void *)r, |
1da177e4 LT |
1353 | var, -1); |
1354 | } | |
1355 | ||
e88e8ae6 TI |
1356 | EXPORT_SYMBOL(snd_pcm_hw_constraint_ratnums); |
1357 | ||
877211f5 TI |
1358 | static int snd_pcm_hw_rule_ratdens(struct snd_pcm_hw_params *params, |
1359 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 1360 | { |
e5e113cf | 1361 | const struct snd_pcm_hw_constraint_ratdens *r = rule->private; |
1da177e4 LT |
1362 | unsigned int num = 0, den = 0; |
1363 | int err = snd_interval_ratden(hw_param_interval(params, rule->var), | |
1364 | r->nrats, r->rats, &num, &den); | |
1365 | if (err >= 0 && den && rule->var == SNDRV_PCM_HW_PARAM_RATE) { | |
1366 | params->rate_num = num; | |
1367 | params->rate_den = den; | |
1368 | } | |
1369 | return err; | |
1370 | } | |
1371 | ||
1372 | /** | |
1c85cc64 | 1373 | * snd_pcm_hw_constraint_ratdens - apply ratdens constraint to a parameter |
df8db936 TI |
1374 | * @runtime: PCM runtime instance |
1375 | * @cond: condition bits | |
1376 | * @var: hw_params variable to apply the ratdens constraint | |
877211f5 | 1377 | * @r: struct snd_ratdens constriants |
eb7c06e8 YB |
1378 | * |
1379 | * Return: Zero if successful, or a negative error code on failure. | |
1da177e4 | 1380 | */ |
877211f5 | 1381 | int snd_pcm_hw_constraint_ratdens(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1382 | unsigned int cond, |
1383 | snd_pcm_hw_param_t var, | |
e5e113cf | 1384 | const struct snd_pcm_hw_constraint_ratdens *r) |
1da177e4 LT |
1385 | { |
1386 | return snd_pcm_hw_rule_add(runtime, cond, var, | |
e5e113cf | 1387 | snd_pcm_hw_rule_ratdens, (void *)r, |
1da177e4 LT |
1388 | var, -1); |
1389 | } | |
1390 | ||
e88e8ae6 TI |
1391 | EXPORT_SYMBOL(snd_pcm_hw_constraint_ratdens); |
1392 | ||
877211f5 TI |
1393 | static int snd_pcm_hw_rule_msbits(struct snd_pcm_hw_params *params, |
1394 | struct snd_pcm_hw_rule *rule) | |
1da177e4 LT |
1395 | { |
1396 | unsigned int l = (unsigned long) rule->private; | |
1397 | int width = l & 0xffff; | |
1398 | unsigned int msbits = l >> 16; | |
b55f9fdc TS |
1399 | const struct snd_interval *i = |
1400 | hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS); | |
8ef9df55 LPC |
1401 | |
1402 | if (!snd_interval_single(i)) | |
1403 | return 0; | |
1404 | ||
1405 | if ((snd_interval_value(i) == width) || | |
1406 | (width == 0 && snd_interval_value(i) > msbits)) | |
19f52fae | 1407 | params->msbits = min_not_zero(params->msbits, msbits); |
8ef9df55 | 1408 | |
1da177e4 LT |
1409 | return 0; |
1410 | } | |
1411 | ||
1412 | /** | |
1c85cc64 | 1413 | * snd_pcm_hw_constraint_msbits - add a hw constraint msbits rule |
df8db936 TI |
1414 | * @runtime: PCM runtime instance |
1415 | * @cond: condition bits | |
1416 | * @width: sample bits width | |
1417 | * @msbits: msbits width | |
eb7c06e8 | 1418 | * |
8ef9df55 LPC |
1419 | * This constraint will set the number of most significant bits (msbits) if a |
1420 | * sample format with the specified width has been select. If width is set to 0 | |
1421 | * the msbits will be set for any sample format with a width larger than the | |
1422 | * specified msbits. | |
1423 | * | |
eb7c06e8 | 1424 | * Return: Zero if successful, or a negative error code on failure. |
1da177e4 | 1425 | */ |
877211f5 | 1426 | int snd_pcm_hw_constraint_msbits(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1427 | unsigned int cond, |
1428 | unsigned int width, | |
1429 | unsigned int msbits) | |
1430 | { | |
1431 | unsigned long l = (msbits << 16) | width; | |
1432 | return snd_pcm_hw_rule_add(runtime, cond, -1, | |
1433 | snd_pcm_hw_rule_msbits, | |
1434 | (void*) l, | |
1435 | SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); | |
1436 | } | |
1437 | ||
e88e8ae6 TI |
1438 | EXPORT_SYMBOL(snd_pcm_hw_constraint_msbits); |
1439 | ||
877211f5 TI |
1440 | static int snd_pcm_hw_rule_step(struct snd_pcm_hw_params *params, |
1441 | struct snd_pcm_hw_rule *rule) | |
1da177e4 LT |
1442 | { |
1443 | unsigned long step = (unsigned long) rule->private; | |
0f519b62 | 1444 | return snd_interval_step(hw_param_interval(params, rule->var), step); |
1da177e4 LT |
1445 | } |
1446 | ||
1447 | /** | |
1c85cc64 | 1448 | * snd_pcm_hw_constraint_step - add a hw constraint step rule |
df8db936 TI |
1449 | * @runtime: PCM runtime instance |
1450 | * @cond: condition bits | |
1451 | * @var: hw_params variable to apply the step constraint | |
1452 | * @step: step size | |
eb7c06e8 YB |
1453 | * |
1454 | * Return: Zero if successful, or a negative error code on failure. | |
1da177e4 | 1455 | */ |
877211f5 | 1456 | int snd_pcm_hw_constraint_step(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1457 | unsigned int cond, |
1458 | snd_pcm_hw_param_t var, | |
1459 | unsigned long step) | |
1460 | { | |
1461 | return snd_pcm_hw_rule_add(runtime, cond, var, | |
1462 | snd_pcm_hw_rule_step, (void *) step, | |
1463 | var, -1); | |
1464 | } | |
1465 | ||
e88e8ae6 TI |
1466 | EXPORT_SYMBOL(snd_pcm_hw_constraint_step); |
1467 | ||
877211f5 | 1468 | static int snd_pcm_hw_rule_pow2(struct snd_pcm_hw_params *params, struct snd_pcm_hw_rule *rule) |
1da177e4 | 1469 | { |
67c39317 | 1470 | static unsigned int pow2_sizes[] = { |
1da177e4 LT |
1471 | 1<<0, 1<<1, 1<<2, 1<<3, 1<<4, 1<<5, 1<<6, 1<<7, |
1472 | 1<<8, 1<<9, 1<<10, 1<<11, 1<<12, 1<<13, 1<<14, 1<<15, | |
1473 | 1<<16, 1<<17, 1<<18, 1<<19, 1<<20, 1<<21, 1<<22, 1<<23, | |
1474 | 1<<24, 1<<25, 1<<26, 1<<27, 1<<28, 1<<29, 1<<30 | |
1475 | }; | |
1476 | return snd_interval_list(hw_param_interval(params, rule->var), | |
1477 | ARRAY_SIZE(pow2_sizes), pow2_sizes, 0); | |
1478 | } | |
1479 | ||
1480 | /** | |
1c85cc64 | 1481 | * snd_pcm_hw_constraint_pow2 - add a hw constraint power-of-2 rule |
df8db936 TI |
1482 | * @runtime: PCM runtime instance |
1483 | * @cond: condition bits | |
1484 | * @var: hw_params variable to apply the power-of-2 constraint | |
eb7c06e8 YB |
1485 | * |
1486 | * Return: Zero if successful, or a negative error code on failure. | |
1da177e4 | 1487 | */ |
877211f5 | 1488 | int snd_pcm_hw_constraint_pow2(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1489 | unsigned int cond, |
1490 | snd_pcm_hw_param_t var) | |
1491 | { | |
1492 | return snd_pcm_hw_rule_add(runtime, cond, var, | |
1493 | snd_pcm_hw_rule_pow2, NULL, | |
1494 | var, -1); | |
1495 | } | |
1496 | ||
e88e8ae6 TI |
1497 | EXPORT_SYMBOL(snd_pcm_hw_constraint_pow2); |
1498 | ||
d5b702a6 CL |
1499 | static int snd_pcm_hw_rule_noresample_func(struct snd_pcm_hw_params *params, |
1500 | struct snd_pcm_hw_rule *rule) | |
1501 | { | |
1502 | unsigned int base_rate = (unsigned int)(uintptr_t)rule->private; | |
1503 | struct snd_interval *rate; | |
1504 | ||
1505 | rate = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE); | |
1506 | return snd_interval_list(rate, 1, &base_rate, 0); | |
1507 | } | |
1508 | ||
1509 | /** | |
1510 | * snd_pcm_hw_rule_noresample - add a rule to allow disabling hw resampling | |
1511 | * @runtime: PCM runtime instance | |
1512 | * @base_rate: the rate at which the hardware does not resample | |
eb7c06e8 YB |
1513 | * |
1514 | * Return: Zero if successful, or a negative error code on failure. | |
d5b702a6 CL |
1515 | */ |
1516 | int snd_pcm_hw_rule_noresample(struct snd_pcm_runtime *runtime, | |
1517 | unsigned int base_rate) | |
1518 | { | |
1519 | return snd_pcm_hw_rule_add(runtime, SNDRV_PCM_HW_PARAMS_NORESAMPLE, | |
1520 | SNDRV_PCM_HW_PARAM_RATE, | |
1521 | snd_pcm_hw_rule_noresample_func, | |
1522 | (void *)(uintptr_t)base_rate, | |
1523 | SNDRV_PCM_HW_PARAM_RATE, -1); | |
1524 | } | |
1525 | EXPORT_SYMBOL(snd_pcm_hw_rule_noresample); | |
1526 | ||
877211f5 | 1527 | static void _snd_pcm_hw_param_any(struct snd_pcm_hw_params *params, |
123992f7 | 1528 | snd_pcm_hw_param_t var) |
1da177e4 LT |
1529 | { |
1530 | if (hw_is_mask(var)) { | |
1531 | snd_mask_any(hw_param_mask(params, var)); | |
1532 | params->cmask |= 1 << var; | |
1533 | params->rmask |= 1 << var; | |
1534 | return; | |
1535 | } | |
1536 | if (hw_is_interval(var)) { | |
1537 | snd_interval_any(hw_param_interval(params, var)); | |
1538 | params->cmask |= 1 << var; | |
1539 | params->rmask |= 1 << var; | |
1540 | return; | |
1541 | } | |
1542 | snd_BUG(); | |
1543 | } | |
1544 | ||
877211f5 | 1545 | void _snd_pcm_hw_params_any(struct snd_pcm_hw_params *params) |
1da177e4 LT |
1546 | { |
1547 | unsigned int k; | |
1548 | memset(params, 0, sizeof(*params)); | |
1549 | for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) | |
1550 | _snd_pcm_hw_param_any(params, k); | |
1551 | for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) | |
1552 | _snd_pcm_hw_param_any(params, k); | |
1553 | params->info = ~0U; | |
1554 | } | |
1555 | ||
e88e8ae6 | 1556 | EXPORT_SYMBOL(_snd_pcm_hw_params_any); |
1da177e4 LT |
1557 | |
1558 | /** | |
1c85cc64 | 1559 | * snd_pcm_hw_param_value - return @params field @var value |
df8db936 TI |
1560 | * @params: the hw_params instance |
1561 | * @var: parameter to retrieve | |
1c85cc64 | 1562 | * @dir: pointer to the direction (-1,0,1) or %NULL |
1da177e4 | 1563 | * |
eb7c06e8 YB |
1564 | * Return: The value for field @var if it's fixed in configuration space |
1565 | * defined by @params. -%EINVAL otherwise. | |
1da177e4 | 1566 | */ |
e88e8ae6 TI |
1567 | int snd_pcm_hw_param_value(const struct snd_pcm_hw_params *params, |
1568 | snd_pcm_hw_param_t var, int *dir) | |
1da177e4 LT |
1569 | { |
1570 | if (hw_is_mask(var)) { | |
877211f5 | 1571 | const struct snd_mask *mask = hw_param_mask_c(params, var); |
1da177e4 LT |
1572 | if (!snd_mask_single(mask)) |
1573 | return -EINVAL; | |
1574 | if (dir) | |
1575 | *dir = 0; | |
1576 | return snd_mask_value(mask); | |
1577 | } | |
1578 | if (hw_is_interval(var)) { | |
877211f5 | 1579 | const struct snd_interval *i = hw_param_interval_c(params, var); |
1da177e4 LT |
1580 | if (!snd_interval_single(i)) |
1581 | return -EINVAL; | |
1582 | if (dir) | |
1583 | *dir = i->openmin; | |
1584 | return snd_interval_value(i); | |
1585 | } | |
1da177e4 LT |
1586 | return -EINVAL; |
1587 | } | |
1588 | ||
e88e8ae6 | 1589 | EXPORT_SYMBOL(snd_pcm_hw_param_value); |
1da177e4 | 1590 | |
877211f5 | 1591 | void _snd_pcm_hw_param_setempty(struct snd_pcm_hw_params *params, |
1da177e4 LT |
1592 | snd_pcm_hw_param_t var) |
1593 | { | |
1594 | if (hw_is_mask(var)) { | |
1595 | snd_mask_none(hw_param_mask(params, var)); | |
1596 | params->cmask |= 1 << var; | |
1597 | params->rmask |= 1 << var; | |
1598 | } else if (hw_is_interval(var)) { | |
1599 | snd_interval_none(hw_param_interval(params, var)); | |
1600 | params->cmask |= 1 << var; | |
1601 | params->rmask |= 1 << var; | |
1602 | } else { | |
1603 | snd_BUG(); | |
1604 | } | |
1605 | } | |
1606 | ||
e88e8ae6 | 1607 | EXPORT_SYMBOL(_snd_pcm_hw_param_setempty); |
1da177e4 | 1608 | |
877211f5 | 1609 | static int _snd_pcm_hw_param_first(struct snd_pcm_hw_params *params, |
123992f7 | 1610 | snd_pcm_hw_param_t var) |
1da177e4 LT |
1611 | { |
1612 | int changed; | |
1613 | if (hw_is_mask(var)) | |
1614 | changed = snd_mask_refine_first(hw_param_mask(params, var)); | |
1615 | else if (hw_is_interval(var)) | |
1616 | changed = snd_interval_refine_first(hw_param_interval(params, var)); | |
2f4ca8e5 | 1617 | else |
1da177e4 | 1618 | return -EINVAL; |
1da177e4 LT |
1619 | if (changed) { |
1620 | params->cmask |= 1 << var; | |
1621 | params->rmask |= 1 << var; | |
1622 | } | |
1623 | return changed; | |
1624 | } | |
1625 | ||
1626 | ||
1627 | /** | |
1c85cc64 | 1628 | * snd_pcm_hw_param_first - refine config space and return minimum value |
df8db936 TI |
1629 | * @pcm: PCM instance |
1630 | * @params: the hw_params instance | |
1631 | * @var: parameter to retrieve | |
1c85cc64 | 1632 | * @dir: pointer to the direction (-1,0,1) or %NULL |
1da177e4 | 1633 | * |
1c85cc64 | 1634 | * Inside configuration space defined by @params remove from @var all |
1da177e4 | 1635 | * values > minimum. Reduce configuration space accordingly. |
eb7c06e8 YB |
1636 | * |
1637 | * Return: The minimum, or a negative error code on failure. | |
1da177e4 | 1638 | */ |
e88e8ae6 TI |
1639 | int snd_pcm_hw_param_first(struct snd_pcm_substream *pcm, |
1640 | struct snd_pcm_hw_params *params, | |
1641 | snd_pcm_hw_param_t var, int *dir) | |
1da177e4 LT |
1642 | { |
1643 | int changed = _snd_pcm_hw_param_first(params, var); | |
1644 | if (changed < 0) | |
1645 | return changed; | |
1646 | if (params->rmask) { | |
1647 | int err = snd_pcm_hw_refine(pcm, params); | |
7eaa943c TI |
1648 | if (snd_BUG_ON(err < 0)) |
1649 | return err; | |
1da177e4 LT |
1650 | } |
1651 | return snd_pcm_hw_param_value(params, var, dir); | |
1652 | } | |
1653 | ||
e88e8ae6 TI |
1654 | EXPORT_SYMBOL(snd_pcm_hw_param_first); |
1655 | ||
877211f5 | 1656 | static int _snd_pcm_hw_param_last(struct snd_pcm_hw_params *params, |
123992f7 | 1657 | snd_pcm_hw_param_t var) |
1da177e4 LT |
1658 | { |
1659 | int changed; | |
1660 | if (hw_is_mask(var)) | |
1661 | changed = snd_mask_refine_last(hw_param_mask(params, var)); | |
1662 | else if (hw_is_interval(var)) | |
1663 | changed = snd_interval_refine_last(hw_param_interval(params, var)); | |
2f4ca8e5 | 1664 | else |
1da177e4 | 1665 | return -EINVAL; |
1da177e4 LT |
1666 | if (changed) { |
1667 | params->cmask |= 1 << var; | |
1668 | params->rmask |= 1 << var; | |
1669 | } | |
1670 | return changed; | |
1671 | } | |
1672 | ||
1673 | ||
1674 | /** | |
1c85cc64 | 1675 | * snd_pcm_hw_param_last - refine config space and return maximum value |
df8db936 TI |
1676 | * @pcm: PCM instance |
1677 | * @params: the hw_params instance | |
1678 | * @var: parameter to retrieve | |
1c85cc64 | 1679 | * @dir: pointer to the direction (-1,0,1) or %NULL |
1da177e4 | 1680 | * |
1c85cc64 | 1681 | * Inside configuration space defined by @params remove from @var all |
1da177e4 | 1682 | * values < maximum. Reduce configuration space accordingly. |
eb7c06e8 YB |
1683 | * |
1684 | * Return: The maximum, or a negative error code on failure. | |
1da177e4 | 1685 | */ |
e88e8ae6 TI |
1686 | int snd_pcm_hw_param_last(struct snd_pcm_substream *pcm, |
1687 | struct snd_pcm_hw_params *params, | |
1688 | snd_pcm_hw_param_t var, int *dir) | |
1da177e4 LT |
1689 | { |
1690 | int changed = _snd_pcm_hw_param_last(params, var); | |
1691 | if (changed < 0) | |
1692 | return changed; | |
1693 | if (params->rmask) { | |
1694 | int err = snd_pcm_hw_refine(pcm, params); | |
7eaa943c TI |
1695 | if (snd_BUG_ON(err < 0)) |
1696 | return err; | |
1da177e4 LT |
1697 | } |
1698 | return snd_pcm_hw_param_value(params, var, dir); | |
1699 | } | |
1700 | ||
e88e8ae6 | 1701 | EXPORT_SYMBOL(snd_pcm_hw_param_last); |
1da177e4 LT |
1702 | |
1703 | /** | |
1c85cc64 | 1704 | * snd_pcm_hw_param_choose - choose a configuration defined by @params |
df8db936 TI |
1705 | * @pcm: PCM instance |
1706 | * @params: the hw_params instance | |
1da177e4 | 1707 | * |
1c85cc64 | 1708 | * Choose one configuration from configuration space defined by @params. |
1da177e4 LT |
1709 | * The configuration chosen is that obtained fixing in this order: |
1710 | * first access, first format, first subformat, min channels, | |
1711 | * min rate, min period time, max buffer size, min tick time | |
eb7c06e8 YB |
1712 | * |
1713 | * Return: Zero if successful, or a negative error code on failure. | |
1da177e4 | 1714 | */ |
2f4ca8e5 TI |
1715 | int snd_pcm_hw_params_choose(struct snd_pcm_substream *pcm, |
1716 | struct snd_pcm_hw_params *params) | |
1da177e4 | 1717 | { |
b46fe5d9 | 1718 | static const int vars[] = { |
2f4ca8e5 TI |
1719 | SNDRV_PCM_HW_PARAM_ACCESS, |
1720 | SNDRV_PCM_HW_PARAM_FORMAT, | |
1721 | SNDRV_PCM_HW_PARAM_SUBFORMAT, | |
1722 | SNDRV_PCM_HW_PARAM_CHANNELS, | |
1723 | SNDRV_PCM_HW_PARAM_RATE, | |
1724 | SNDRV_PCM_HW_PARAM_PERIOD_TIME, | |
1725 | SNDRV_PCM_HW_PARAM_BUFFER_SIZE, | |
1726 | SNDRV_PCM_HW_PARAM_TICK_TIME, | |
1727 | -1 | |
1728 | }; | |
b46fe5d9 TS |
1729 | const int *v; |
1730 | int err; | |
1da177e4 | 1731 | |
2f4ca8e5 TI |
1732 | for (v = vars; *v != -1; v++) { |
1733 | if (*v != SNDRV_PCM_HW_PARAM_BUFFER_SIZE) | |
1734 | err = snd_pcm_hw_param_first(pcm, params, *v, NULL); | |
1735 | else | |
1736 | err = snd_pcm_hw_param_last(pcm, params, *v, NULL); | |
7eaa943c TI |
1737 | if (snd_BUG_ON(err < 0)) |
1738 | return err; | |
2f4ca8e5 | 1739 | } |
1da177e4 LT |
1740 | return 0; |
1741 | } | |
1742 | ||
877211f5 | 1743 | static int snd_pcm_lib_ioctl_reset(struct snd_pcm_substream *substream, |
1da177e4 LT |
1744 | void *arg) |
1745 | { | |
877211f5 | 1746 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1747 | unsigned long flags; |
1748 | snd_pcm_stream_lock_irqsave(substream, flags); | |
1749 | if (snd_pcm_running(substream) && | |
1750 | snd_pcm_update_hw_ptr(substream) >= 0) | |
1751 | runtime->status->hw_ptr %= runtime->buffer_size; | |
0e8014d7 | 1752 | else { |
1da177e4 | 1753 | runtime->status->hw_ptr = 0; |
0e8014d7 PLB |
1754 | runtime->hw_ptr_wrap = 0; |
1755 | } | |
1da177e4 LT |
1756 | snd_pcm_stream_unlock_irqrestore(substream, flags); |
1757 | return 0; | |
1758 | } | |
1759 | ||
877211f5 | 1760 | static int snd_pcm_lib_ioctl_channel_info(struct snd_pcm_substream *substream, |
1da177e4 LT |
1761 | void *arg) |
1762 | { | |
877211f5 TI |
1763 | struct snd_pcm_channel_info *info = arg; |
1764 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1da177e4 LT |
1765 | int width; |
1766 | if (!(runtime->info & SNDRV_PCM_INFO_MMAP)) { | |
1767 | info->offset = -1; | |
1768 | return 0; | |
1769 | } | |
1770 | width = snd_pcm_format_physical_width(runtime->format); | |
1771 | if (width < 0) | |
1772 | return width; | |
1773 | info->offset = 0; | |
1774 | switch (runtime->access) { | |
1775 | case SNDRV_PCM_ACCESS_MMAP_INTERLEAVED: | |
1776 | case SNDRV_PCM_ACCESS_RW_INTERLEAVED: | |
1777 | info->first = info->channel * width; | |
1778 | info->step = runtime->channels * width; | |
1779 | break; | |
1780 | case SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED: | |
1781 | case SNDRV_PCM_ACCESS_RW_NONINTERLEAVED: | |
1782 | { | |
1783 | size_t size = runtime->dma_bytes / runtime->channels; | |
1784 | info->first = info->channel * size * 8; | |
1785 | info->step = width; | |
1786 | break; | |
1787 | } | |
1788 | default: | |
1789 | snd_BUG(); | |
1790 | break; | |
1791 | } | |
1792 | return 0; | |
1793 | } | |
1794 | ||
8bea869c JK |
1795 | static int snd_pcm_lib_ioctl_fifo_size(struct snd_pcm_substream *substream, |
1796 | void *arg) | |
1797 | { | |
1798 | struct snd_pcm_hw_params *params = arg; | |
1799 | snd_pcm_format_t format; | |
a9960e6a CL |
1800 | int channels; |
1801 | ssize_t frame_size; | |
8bea869c JK |
1802 | |
1803 | params->fifo_size = substream->runtime->hw.fifo_size; | |
1804 | if (!(substream->runtime->hw.info & SNDRV_PCM_INFO_FIFO_IN_FRAMES)) { | |
1805 | format = params_format(params); | |
1806 | channels = params_channels(params); | |
a9960e6a CL |
1807 | frame_size = snd_pcm_format_size(format, channels); |
1808 | if (frame_size > 0) | |
1809 | params->fifo_size /= (unsigned)frame_size; | |
8bea869c JK |
1810 | } |
1811 | return 0; | |
1812 | } | |
1813 | ||
1da177e4 LT |
1814 | /** |
1815 | * snd_pcm_lib_ioctl - a generic PCM ioctl callback | |
1816 | * @substream: the pcm substream instance | |
1817 | * @cmd: ioctl command | |
1818 | * @arg: ioctl argument | |
1819 | * | |
1820 | * Processes the generic ioctl commands for PCM. | |
1821 | * Can be passed as the ioctl callback for PCM ops. | |
1822 | * | |
eb7c06e8 | 1823 | * Return: Zero if successful, or a negative error code on failure. |
1da177e4 | 1824 | */ |
877211f5 | 1825 | int snd_pcm_lib_ioctl(struct snd_pcm_substream *substream, |
1da177e4 LT |
1826 | unsigned int cmd, void *arg) |
1827 | { | |
1828 | switch (cmd) { | |
1829 | case SNDRV_PCM_IOCTL1_INFO: | |
1830 | return 0; | |
1831 | case SNDRV_PCM_IOCTL1_RESET: | |
1832 | return snd_pcm_lib_ioctl_reset(substream, arg); | |
1833 | case SNDRV_PCM_IOCTL1_CHANNEL_INFO: | |
1834 | return snd_pcm_lib_ioctl_channel_info(substream, arg); | |
8bea869c JK |
1835 | case SNDRV_PCM_IOCTL1_FIFO_SIZE: |
1836 | return snd_pcm_lib_ioctl_fifo_size(substream, arg); | |
1da177e4 LT |
1837 | } |
1838 | return -ENXIO; | |
1839 | } | |
1840 | ||
e88e8ae6 TI |
1841 | EXPORT_SYMBOL(snd_pcm_lib_ioctl); |
1842 | ||
1da177e4 LT |
1843 | /** |
1844 | * snd_pcm_period_elapsed - update the pcm status for the next period | |
1845 | * @substream: the pcm substream instance | |
1846 | * | |
1847 | * This function is called from the interrupt handler when the | |
1848 | * PCM has processed the period size. It will update the current | |
31e8960b | 1849 | * pointer, wake up sleepers, etc. |
1da177e4 LT |
1850 | * |
1851 | * Even if more than one periods have elapsed since the last call, you | |
1852 | * have to call this only once. | |
1853 | */ | |
877211f5 | 1854 | void snd_pcm_period_elapsed(struct snd_pcm_substream *substream) |
1da177e4 | 1855 | { |
877211f5 | 1856 | struct snd_pcm_runtime *runtime; |
1da177e4 LT |
1857 | unsigned long flags; |
1858 | ||
7eaa943c TI |
1859 | if (PCM_RUNTIME_CHECK(substream)) |
1860 | return; | |
1da177e4 | 1861 | runtime = substream->runtime; |
1da177e4 | 1862 | |
1da177e4 LT |
1863 | snd_pcm_stream_lock_irqsave(substream, flags); |
1864 | if (!snd_pcm_running(substream) || | |
f240406b | 1865 | snd_pcm_update_hw_ptr0(substream, 1) < 0) |
1da177e4 LT |
1866 | goto _end; |
1867 | ||
90bbaf66 | 1868 | #ifdef CONFIG_SND_PCM_TIMER |
1da177e4 LT |
1869 | if (substream->timer_running) |
1870 | snd_timer_interrupt(substream->timer, 1); | |
90bbaf66 | 1871 | #endif |
1da177e4 | 1872 | _end: |
1da177e4 | 1873 | kill_fasync(&runtime->fasync, SIGIO, POLL_IN); |
3aa02cb6 | 1874 | snd_pcm_stream_unlock_irqrestore(substream, flags); |
1da177e4 LT |
1875 | } |
1876 | ||
e88e8ae6 TI |
1877 | EXPORT_SYMBOL(snd_pcm_period_elapsed); |
1878 | ||
13075510 TI |
1879 | /* |
1880 | * Wait until avail_min data becomes available | |
1881 | * Returns a negative error code if any error occurs during operation. | |
1882 | * The available space is stored on availp. When err = 0 and avail = 0 | |
1883 | * on the capture stream, it indicates the stream is in DRAINING state. | |
1884 | */ | |
5daeba34 | 1885 | static int wait_for_avail(struct snd_pcm_substream *substream, |
13075510 TI |
1886 | snd_pcm_uframes_t *availp) |
1887 | { | |
1888 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1889 | int is_playback = substream->stream == SNDRV_PCM_STREAM_PLAYBACK; | |
1890 | wait_queue_t wait; | |
1891 | int err = 0; | |
1892 | snd_pcm_uframes_t avail = 0; | |
f2b3614c TI |
1893 | long wait_time, tout; |
1894 | ||
763437a9 AV |
1895 | init_waitqueue_entry(&wait, current); |
1896 | set_current_state(TASK_INTERRUPTIBLE); | |
1897 | add_wait_queue(&runtime->tsleep, &wait); | |
1898 | ||
f2b3614c TI |
1899 | if (runtime->no_period_wakeup) |
1900 | wait_time = MAX_SCHEDULE_TIMEOUT; | |
1901 | else { | |
1902 | wait_time = 10; | |
1903 | if (runtime->rate) { | |
1904 | long t = runtime->period_size * 2 / runtime->rate; | |
1905 | wait_time = max(t, wait_time); | |
1906 | } | |
1907 | wait_time = msecs_to_jiffies(wait_time * 1000); | |
1908 | } | |
763437a9 | 1909 | |
13075510 TI |
1910 | for (;;) { |
1911 | if (signal_pending(current)) { | |
1912 | err = -ERESTARTSYS; | |
1913 | break; | |
1914 | } | |
763437a9 AV |
1915 | |
1916 | /* | |
1917 | * We need to check if space became available already | |
1918 | * (and thus the wakeup happened already) first to close | |
1919 | * the race of space already having become available. | |
1920 | * This check must happen after been added to the waitqueue | |
1921 | * and having current state be INTERRUPTIBLE. | |
1922 | */ | |
1923 | if (is_playback) | |
1924 | avail = snd_pcm_playback_avail(runtime); | |
1925 | else | |
1926 | avail = snd_pcm_capture_avail(runtime); | |
1927 | if (avail >= runtime->twake) | |
1928 | break; | |
13075510 | 1929 | snd_pcm_stream_unlock_irq(substream); |
763437a9 AV |
1930 | |
1931 | tout = schedule_timeout(wait_time); | |
1932 | ||
13075510 | 1933 | snd_pcm_stream_lock_irq(substream); |
763437a9 | 1934 | set_current_state(TASK_INTERRUPTIBLE); |
13075510 TI |
1935 | switch (runtime->status->state) { |
1936 | case SNDRV_PCM_STATE_SUSPENDED: | |
1937 | err = -ESTRPIPE; | |
1938 | goto _endloop; | |
1939 | case SNDRV_PCM_STATE_XRUN: | |
1940 | err = -EPIPE; | |
1941 | goto _endloop; | |
1942 | case SNDRV_PCM_STATE_DRAINING: | |
1943 | if (is_playback) | |
1944 | err = -EPIPE; | |
1945 | else | |
1946 | avail = 0; /* indicate draining */ | |
1947 | goto _endloop; | |
1948 | case SNDRV_PCM_STATE_OPEN: | |
1949 | case SNDRV_PCM_STATE_SETUP: | |
1950 | case SNDRV_PCM_STATE_DISCONNECTED: | |
1951 | err = -EBADFD; | |
1952 | goto _endloop; | |
ed697e1a JK |
1953 | case SNDRV_PCM_STATE_PAUSED: |
1954 | continue; | |
13075510 TI |
1955 | } |
1956 | if (!tout) { | |
09e56df8 TI |
1957 | pcm_dbg(substream->pcm, |
1958 | "%s write error (DMA or IRQ trouble?)\n", | |
1959 | is_playback ? "playback" : "capture"); | |
13075510 TI |
1960 | err = -EIO; |
1961 | break; | |
1962 | } | |
13075510 TI |
1963 | } |
1964 | _endloop: | |
763437a9 | 1965 | set_current_state(TASK_RUNNING); |
c91a988d | 1966 | remove_wait_queue(&runtime->tsleep, &wait); |
13075510 TI |
1967 | *availp = avail; |
1968 | return err; | |
1969 | } | |
1970 | ||
9f600630 TI |
1971 | typedef int (*pcm_transfer_f)(struct snd_pcm_substream *substream, |
1972 | int channel, unsigned long hwoff, | |
1973 | void *buf, unsigned long bytes); | |
bdc4acf7 | 1974 | |
9f600630 TI |
1975 | typedef int (*pcm_copy_f)(struct snd_pcm_substream *, snd_pcm_uframes_t, void *, |
1976 | snd_pcm_uframes_t, snd_pcm_uframes_t, pcm_transfer_f); | |
1977 | ||
1978 | /* calculate the target DMA-buffer position to be written/read */ | |
1979 | static void *get_dma_ptr(struct snd_pcm_runtime *runtime, | |
1980 | int channel, unsigned long hwoff) | |
1981 | { | |
1982 | return runtime->dma_area + hwoff + | |
1983 | channel * (runtime->dma_bytes / runtime->channels); | |
1984 | } | |
1985 | ||
5c7264cf TI |
1986 | /* default copy_user ops for write; used for both interleaved and non- modes */ |
1987 | static int default_write_copy(struct snd_pcm_substream *substream, | |
1988 | int channel, unsigned long hwoff, | |
1989 | void *buf, unsigned long bytes) | |
9f600630 TI |
1990 | { |
1991 | if (copy_from_user(get_dma_ptr(substream->runtime, channel, hwoff), | |
5c7264cf | 1992 | (void __user *)buf, bytes)) |
9f600630 TI |
1993 | return -EFAULT; |
1994 | return 0; | |
1995 | } | |
1996 | ||
1997 | /* fill silence instead of copy data; called as a transfer helper | |
1998 | * from __snd_pcm_lib_write() or directly from noninterleaved_copy() when | |
1999 | * a NULL buffer is passed | |
2000 | */ | |
2001 | static int fill_silence(struct snd_pcm_substream *substream, int channel, | |
2002 | unsigned long hwoff, void *buf, unsigned long bytes) | |
1da177e4 | 2003 | { |
877211f5 | 2004 | struct snd_pcm_runtime *runtime = substream->runtime; |
9f600630 TI |
2005 | |
2006 | if (substream->stream != SNDRV_PCM_STREAM_PLAYBACK) | |
2007 | return 0; | |
2008 | if (substream->ops->fill_silence) | |
2009 | return substream->ops->fill_silence(substream, channel, | |
2010 | hwoff, bytes); | |
2011 | ||
2012 | snd_pcm_format_set_silence(runtime->format, | |
2013 | get_dma_ptr(runtime, channel, hwoff), | |
2014 | bytes_to_samples(runtime, bytes)); | |
1da177e4 LT |
2015 | return 0; |
2016 | } | |
9f600630 | 2017 | |
5c7264cf TI |
2018 | /* default copy_user ops for read; used for both interleaved and non- modes */ |
2019 | static int default_read_copy(struct snd_pcm_substream *substream, | |
2020 | int channel, unsigned long hwoff, | |
2021 | void *buf, unsigned long bytes) | |
2022 | { | |
2023 | if (copy_to_user((void __user *)buf, | |
2024 | get_dma_ptr(substream->runtime, channel, hwoff), | |
2025 | bytes)) | |
2026 | return -EFAULT; | |
2027 | return 0; | |
2028 | } | |
2029 | ||
9f600630 TI |
2030 | /* call transfer function with the converted pointers and sizes; |
2031 | * for interleaved mode, it's one shot for all samples | |
2032 | */ | |
2033 | static int interleaved_copy(struct snd_pcm_substream *substream, | |
2034 | snd_pcm_uframes_t hwoff, void *data, | |
2035 | snd_pcm_uframes_t off, | |
2036 | snd_pcm_uframes_t frames, | |
2037 | pcm_transfer_f transfer) | |
2038 | { | |
2039 | struct snd_pcm_runtime *runtime = substream->runtime; | |
2040 | ||
2041 | /* convert to bytes */ | |
2042 | hwoff = frames_to_bytes(runtime, hwoff); | |
2043 | off = frames_to_bytes(runtime, off); | |
2044 | frames = frames_to_bytes(runtime, frames); | |
2045 | return transfer(substream, 0, hwoff, data + off, frames); | |
2046 | } | |
2047 | ||
2048 | /* call transfer function with the converted pointers and sizes for each | |
2049 | * non-interleaved channel; when buffer is NULL, silencing instead of copying | |
2050 | */ | |
2051 | static int noninterleaved_copy(struct snd_pcm_substream *substream, | |
2052 | snd_pcm_uframes_t hwoff, void *data, | |
2053 | snd_pcm_uframes_t off, | |
2054 | snd_pcm_uframes_t frames, | |
2055 | pcm_transfer_f transfer) | |
bdc4acf7 TI |
2056 | { |
2057 | struct snd_pcm_runtime *runtime = substream->runtime; | |
bdc4acf7 | 2058 | int channels = runtime->channels; |
9f600630 TI |
2059 | void **bufs = data; |
2060 | int c, err; | |
2061 | ||
2062 | /* convert to bytes; note that it's not frames_to_bytes() here. | |
2063 | * in non-interleaved mode, we copy for each channel, thus | |
2064 | * each copy is n_samples bytes x channels = whole frames. | |
2065 | */ | |
2066 | off = samples_to_bytes(runtime, off); | |
2067 | frames = samples_to_bytes(runtime, frames); | |
2068 | hwoff = samples_to_bytes(runtime, hwoff); | |
2069 | for (c = 0; c < channels; ++c, ++bufs) { | |
2070 | if (!data || !*bufs) | |
2071 | err = fill_silence(substream, c, hwoff, NULL, frames); | |
2072 | else | |
2073 | err = transfer(substream, c, hwoff, *bufs + off, | |
2074 | frames); | |
2075 | if (err < 0) | |
2076 | return err; | |
bdc4acf7 TI |
2077 | } |
2078 | return 0; | |
2079 | } | |
2080 | ||
a9cd29e7 TI |
2081 | /* fill silence on the given buffer position; |
2082 | * called from snd_pcm_playback_silence() | |
2083 | */ | |
2084 | static int fill_silence_frames(struct snd_pcm_substream *substream, | |
2085 | snd_pcm_uframes_t off, snd_pcm_uframes_t frames) | |
2086 | { | |
2087 | if (substream->runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED || | |
2088 | substream->runtime->access == SNDRV_PCM_ACCESS_MMAP_INTERLEAVED) | |
2089 | return interleaved_copy(substream, off, NULL, 0, frames, | |
2090 | fill_silence); | |
2091 | else | |
2092 | return noninterleaved_copy(substream, off, NULL, 0, frames, | |
2093 | fill_silence); | |
2094 | } | |
2095 | ||
bdc4acf7 TI |
2096 | /* sanity-check for read/write methods */ |
2097 | static int pcm_sanity_check(struct snd_pcm_substream *substream) | |
2098 | { | |
2099 | struct snd_pcm_runtime *runtime; | |
2100 | if (PCM_RUNTIME_CHECK(substream)) | |
2101 | return -ENXIO; | |
2102 | runtime = substream->runtime; | |
2103 | if (snd_BUG_ON(!substream->ops->copy_user && !runtime->dma_area)) | |
2104 | return -EINVAL; | |
2105 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) | |
2106 | return -EBADFD; | |
2107 | return 0; | |
2108 | } | |
1da177e4 | 2109 | |
6ba63929 TI |
2110 | static int pcm_accessible_state(struct snd_pcm_runtime *runtime) |
2111 | { | |
2112 | switch (runtime->status->state) { | |
2113 | case SNDRV_PCM_STATE_PREPARED: | |
2114 | case SNDRV_PCM_STATE_RUNNING: | |
2115 | case SNDRV_PCM_STATE_PAUSED: | |
2116 | return 0; | |
2117 | case SNDRV_PCM_STATE_XRUN: | |
2118 | return -EPIPE; | |
2119 | case SNDRV_PCM_STATE_SUSPENDED: | |
2120 | return -ESTRPIPE; | |
2121 | default: | |
2122 | return -EBADFD; | |
2123 | } | |
2124 | } | |
2125 | ||
5c7264cf TI |
2126 | /* the common loop for read/write data */ |
2127 | snd_pcm_sframes_t __snd_pcm_lib_xfer(struct snd_pcm_substream *substream, | |
2128 | void *data, bool interleaved, | |
2129 | snd_pcm_uframes_t size) | |
1da177e4 | 2130 | { |
877211f5 | 2131 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
2132 | snd_pcm_uframes_t xfer = 0; |
2133 | snd_pcm_uframes_t offset = 0; | |
0910c216 | 2134 | snd_pcm_uframes_t avail; |
9f600630 TI |
2135 | pcm_copy_f writer; |
2136 | pcm_transfer_f transfer; | |
c48f12ee | 2137 | bool nonblock; |
5c7264cf | 2138 | bool is_playback; |
c48f12ee TI |
2139 | int err; |
2140 | ||
2141 | err = pcm_sanity_check(substream); | |
2142 | if (err < 0) | |
2143 | return err; | |
c48f12ee | 2144 | |
5c7264cf | 2145 | is_playback = substream->stream == SNDRV_PCM_STREAM_PLAYBACK; |
c48f12ee TI |
2146 | if (interleaved) { |
2147 | if (runtime->access != SNDRV_PCM_ACCESS_RW_INTERLEAVED && | |
2148 | runtime->channels > 1) | |
2149 | return -EINVAL; | |
9f600630 | 2150 | writer = interleaved_copy; |
c48f12ee TI |
2151 | } else { |
2152 | if (runtime->access != SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) | |
2153 | return -EINVAL; | |
9f600630 TI |
2154 | writer = noninterleaved_copy; |
2155 | } | |
2156 | ||
2157 | if (!data) { | |
5c7264cf TI |
2158 | if (is_playback) |
2159 | transfer = fill_silence; | |
2160 | else | |
2161 | return -EINVAL; | |
9f600630 TI |
2162 | } else { |
2163 | if (substream->ops->copy_user) | |
2164 | transfer = (pcm_transfer_f)substream->ops->copy_user; | |
2165 | else | |
5c7264cf TI |
2166 | transfer = is_playback ? |
2167 | default_write_copy : default_read_copy; | |
c48f12ee | 2168 | } |
1da177e4 LT |
2169 | |
2170 | if (size == 0) | |
2171 | return 0; | |
1da177e4 | 2172 | |
c48f12ee TI |
2173 | nonblock = !!(substream->f_flags & O_NONBLOCK); |
2174 | ||
1da177e4 | 2175 | snd_pcm_stream_lock_irq(substream); |
6ba63929 TI |
2176 | err = pcm_accessible_state(runtime); |
2177 | if (err < 0) | |
1da177e4 | 2178 | goto _end_unlock; |
1da177e4 | 2179 | |
5c7264cf TI |
2180 | if (!is_playback && |
2181 | runtime->status->state == SNDRV_PCM_STATE_PREPARED && | |
6ba63929 TI |
2182 | size >= runtime->start_threshold) { |
2183 | err = snd_pcm_start(substream); | |
2184 | if (err < 0) | |
2185 | goto _end_unlock; | |
1da177e4 LT |
2186 | } |
2187 | ||
5daeba34 | 2188 | runtime->twake = runtime->control->avail_min ? : 1; |
0910c216 TI |
2189 | if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) |
2190 | snd_pcm_update_hw_ptr(substream); | |
5c7264cf TI |
2191 | if (is_playback) |
2192 | avail = snd_pcm_playback_avail(runtime); | |
2193 | else | |
2194 | avail = snd_pcm_capture_avail(runtime); | |
1da177e4 LT |
2195 | while (size > 0) { |
2196 | snd_pcm_uframes_t frames, appl_ptr, appl_ofs; | |
1da177e4 | 2197 | snd_pcm_uframes_t cont; |
13075510 | 2198 | if (!avail) { |
5c7264cf TI |
2199 | if (!is_playback && |
2200 | runtime->status->state == SNDRV_PCM_STATE_DRAINING) { | |
13075510 | 2201 | snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP); |
1da177e4 LT |
2202 | goto _end_unlock; |
2203 | } | |
1da177e4 LT |
2204 | if (nonblock) { |
2205 | err = -EAGAIN; | |
2206 | goto _end_unlock; | |
2207 | } | |
5daeba34 DD |
2208 | runtime->twake = min_t(snd_pcm_uframes_t, size, |
2209 | runtime->control->avail_min ? : 1); | |
2210 | err = wait_for_avail(substream, &avail); | |
13075510 | 2211 | if (err < 0) |
443feb88 | 2212 | goto _end_unlock; |
13075510 TI |
2213 | if (!avail) |
2214 | continue; /* draining */ | |
1da177e4 | 2215 | } |
1da177e4 LT |
2216 | frames = size > avail ? avail : size; |
2217 | cont = runtime->buffer_size - runtime->control->appl_ptr % runtime->buffer_size; | |
2218 | if (frames > cont) | |
2219 | frames = cont; | |
7eaa943c | 2220 | if (snd_BUG_ON(!frames)) { |
c91a988d | 2221 | runtime->twake = 0; |
7eaa943c TI |
2222 | snd_pcm_stream_unlock_irq(substream); |
2223 | return -EINVAL; | |
2224 | } | |
1da177e4 LT |
2225 | appl_ptr = runtime->control->appl_ptr; |
2226 | appl_ofs = appl_ptr % runtime->buffer_size; | |
2227 | snd_pcm_stream_unlock_irq(substream); | |
5c7264cf | 2228 | err = writer(substream, appl_ofs, data, offset, frames, |
9f600630 | 2229 | transfer); |
1da177e4 | 2230 | snd_pcm_stream_lock_irq(substream); |
1250932e JK |
2231 | if (err < 0) |
2232 | goto _end_unlock; | |
6ba63929 TI |
2233 | err = pcm_accessible_state(runtime); |
2234 | if (err < 0) | |
1da177e4 | 2235 | goto _end_unlock; |
1da177e4 LT |
2236 | appl_ptr += frames; |
2237 | if (appl_ptr >= runtime->boundary) | |
2238 | appl_ptr -= runtime->boundary; | |
2239 | runtime->control->appl_ptr = appl_ptr; | |
2240 | if (substream->ops->ack) | |
2241 | substream->ops->ack(substream); | |
2242 | ||
2243 | offset += frames; | |
2244 | size -= frames; | |
2245 | xfer += frames; | |
0910c216 | 2246 | avail -= frames; |
5c7264cf TI |
2247 | if (is_playback && |
2248 | runtime->status->state == SNDRV_PCM_STATE_PREPARED && | |
2249 | snd_pcm_playback_hw_avail(runtime) >= (snd_pcm_sframes_t)runtime->start_threshold) { | |
2250 | err = snd_pcm_start(substream); | |
2251 | if (err < 0) | |
2252 | goto _end_unlock; | |
2253 | } | |
1da177e4 LT |
2254 | } |
2255 | _end_unlock: | |
c91a988d | 2256 | runtime->twake = 0; |
1250932e JK |
2257 | if (xfer > 0 && err >= 0) |
2258 | snd_pcm_update_state(substream, runtime); | |
1da177e4 | 2259 | snd_pcm_stream_unlock_irq(substream); |
1da177e4 LT |
2260 | return xfer > 0 ? (snd_pcm_sframes_t)xfer : err; |
2261 | } | |
5c7264cf | 2262 | EXPORT_SYMBOL(__snd_pcm_lib_xfer); |
2d3391ec TI |
2263 | |
2264 | /* | |
2265 | * standard channel mapping helpers | |
2266 | */ | |
2267 | ||
2268 | /* default channel maps for multi-channel playbacks, up to 8 channels */ | |
2269 | const struct snd_pcm_chmap_elem snd_pcm_std_chmaps[] = { | |
2270 | { .channels = 1, | |
5efbc261 | 2271 | .map = { SNDRV_CHMAP_MONO } }, |
2d3391ec TI |
2272 | { .channels = 2, |
2273 | .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR } }, | |
2274 | { .channels = 4, | |
2275 | .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, | |
2276 | SNDRV_CHMAP_RL, SNDRV_CHMAP_RR } }, | |
2277 | { .channels = 6, | |
2278 | .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, | |
2279 | SNDRV_CHMAP_RL, SNDRV_CHMAP_RR, | |
2280 | SNDRV_CHMAP_FC, SNDRV_CHMAP_LFE } }, | |
2281 | { .channels = 8, | |
2282 | .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, | |
2283 | SNDRV_CHMAP_RL, SNDRV_CHMAP_RR, | |
2284 | SNDRV_CHMAP_FC, SNDRV_CHMAP_LFE, | |
2285 | SNDRV_CHMAP_SL, SNDRV_CHMAP_SR } }, | |
2286 | { } | |
2287 | }; | |
2288 | EXPORT_SYMBOL_GPL(snd_pcm_std_chmaps); | |
2289 | ||
2290 | /* alternative channel maps with CLFE <-> surround swapped for 6/8 channels */ | |
2291 | const struct snd_pcm_chmap_elem snd_pcm_alt_chmaps[] = { | |
2292 | { .channels = 1, | |
5efbc261 | 2293 | .map = { SNDRV_CHMAP_MONO } }, |
2d3391ec TI |
2294 | { .channels = 2, |
2295 | .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR } }, | |
2296 | { .channels = 4, | |
2297 | .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, | |
2298 | SNDRV_CHMAP_RL, SNDRV_CHMAP_RR } }, | |
2299 | { .channels = 6, | |
2300 | .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, | |
2301 | SNDRV_CHMAP_FC, SNDRV_CHMAP_LFE, | |
2302 | SNDRV_CHMAP_RL, SNDRV_CHMAP_RR } }, | |
2303 | { .channels = 8, | |
2304 | .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, | |
2305 | SNDRV_CHMAP_FC, SNDRV_CHMAP_LFE, | |
2306 | SNDRV_CHMAP_RL, SNDRV_CHMAP_RR, | |
2307 | SNDRV_CHMAP_SL, SNDRV_CHMAP_SR } }, | |
2308 | { } | |
2309 | }; | |
2310 | EXPORT_SYMBOL_GPL(snd_pcm_alt_chmaps); | |
2311 | ||
2312 | static bool valid_chmap_channels(const struct snd_pcm_chmap *info, int ch) | |
2313 | { | |
2314 | if (ch > info->max_channels) | |
2315 | return false; | |
2316 | return !info->channel_mask || (info->channel_mask & (1U << ch)); | |
2317 | } | |
2318 | ||
2319 | static int pcm_chmap_ctl_info(struct snd_kcontrol *kcontrol, | |
2320 | struct snd_ctl_elem_info *uinfo) | |
2321 | { | |
2322 | struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol); | |
2323 | ||
2324 | uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; | |
2325 | uinfo->count = 0; | |
2326 | uinfo->count = info->max_channels; | |
2327 | uinfo->value.integer.min = 0; | |
2328 | uinfo->value.integer.max = SNDRV_CHMAP_LAST; | |
2329 | return 0; | |
2330 | } | |
2331 | ||
2332 | /* get callback for channel map ctl element | |
2333 | * stores the channel position firstly matching with the current channels | |
2334 | */ | |
2335 | static int pcm_chmap_ctl_get(struct snd_kcontrol *kcontrol, | |
2336 | struct snd_ctl_elem_value *ucontrol) | |
2337 | { | |
2338 | struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol); | |
2339 | unsigned int idx = snd_ctl_get_ioffidx(kcontrol, &ucontrol->id); | |
2340 | struct snd_pcm_substream *substream; | |
2341 | const struct snd_pcm_chmap_elem *map; | |
2342 | ||
2343 | if (snd_BUG_ON(!info->chmap)) | |
2344 | return -EINVAL; | |
2345 | substream = snd_pcm_chmap_substream(info, idx); | |
2346 | if (!substream) | |
2347 | return -ENODEV; | |
2348 | memset(ucontrol->value.integer.value, 0, | |
2349 | sizeof(ucontrol->value.integer.value)); | |
2350 | if (!substream->runtime) | |
2351 | return 0; /* no channels set */ | |
2352 | for (map = info->chmap; map->channels; map++) { | |
2353 | int i; | |
2354 | if (map->channels == substream->runtime->channels && | |
2355 | valid_chmap_channels(info, map->channels)) { | |
2356 | for (i = 0; i < map->channels; i++) | |
2357 | ucontrol->value.integer.value[i] = map->map[i]; | |
2358 | return 0; | |
2359 | } | |
2360 | } | |
2361 | return -EINVAL; | |
2362 | } | |
2363 | ||
2364 | /* tlv callback for channel map ctl element | |
2365 | * expands the pre-defined channel maps in a form of TLV | |
2366 | */ | |
2367 | static int pcm_chmap_ctl_tlv(struct snd_kcontrol *kcontrol, int op_flag, | |
2368 | unsigned int size, unsigned int __user *tlv) | |
2369 | { | |
2370 | struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol); | |
2371 | const struct snd_pcm_chmap_elem *map; | |
2372 | unsigned int __user *dst; | |
2373 | int c, count = 0; | |
2374 | ||
2375 | if (snd_BUG_ON(!info->chmap)) | |
2376 | return -EINVAL; | |
2377 | if (size < 8) | |
2378 | return -ENOMEM; | |
2379 | if (put_user(SNDRV_CTL_TLVT_CONTAINER, tlv)) | |
2380 | return -EFAULT; | |
2381 | size -= 8; | |
2382 | dst = tlv + 2; | |
2383 | for (map = info->chmap; map->channels; map++) { | |
2384 | int chs_bytes = map->channels * 4; | |
2385 | if (!valid_chmap_channels(info, map->channels)) | |
2386 | continue; | |
2387 | if (size < 8) | |
2388 | return -ENOMEM; | |
2389 | if (put_user(SNDRV_CTL_TLVT_CHMAP_FIXED, dst) || | |
2390 | put_user(chs_bytes, dst + 1)) | |
2391 | return -EFAULT; | |
2392 | dst += 2; | |
2393 | size -= 8; | |
2394 | count += 8; | |
2395 | if (size < chs_bytes) | |
2396 | return -ENOMEM; | |
2397 | size -= chs_bytes; | |
2398 | count += chs_bytes; | |
2399 | for (c = 0; c < map->channels; c++) { | |
2400 | if (put_user(map->map[c], dst)) | |
2401 | return -EFAULT; | |
2402 | dst++; | |
2403 | } | |
2404 | } | |
2405 | if (put_user(count, tlv + 1)) | |
2406 | return -EFAULT; | |
2407 | return 0; | |
2408 | } | |
2409 | ||
2410 | static void pcm_chmap_ctl_private_free(struct snd_kcontrol *kcontrol) | |
2411 | { | |
2412 | struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol); | |
2413 | info->pcm->streams[info->stream].chmap_kctl = NULL; | |
2414 | kfree(info); | |
2415 | } | |
2416 | ||
2417 | /** | |
2418 | * snd_pcm_add_chmap_ctls - create channel-mapping control elements | |
2419 | * @pcm: the assigned PCM instance | |
2420 | * @stream: stream direction | |
2421 | * @chmap: channel map elements (for query) | |
2422 | * @max_channels: the max number of channels for the stream | |
2423 | * @private_value: the value passed to each kcontrol's private_value field | |
2424 | * @info_ret: store struct snd_pcm_chmap instance if non-NULL | |
2425 | * | |
2426 | * Create channel-mapping control elements assigned to the given PCM stream(s). | |
eb7c06e8 | 2427 | * Return: Zero if successful, or a negative error value. |
2d3391ec TI |
2428 | */ |
2429 | int snd_pcm_add_chmap_ctls(struct snd_pcm *pcm, int stream, | |
2430 | const struct snd_pcm_chmap_elem *chmap, | |
2431 | int max_channels, | |
2432 | unsigned long private_value, | |
2433 | struct snd_pcm_chmap **info_ret) | |
2434 | { | |
2435 | struct snd_pcm_chmap *info; | |
2436 | struct snd_kcontrol_new knew = { | |
2437 | .iface = SNDRV_CTL_ELEM_IFACE_PCM, | |
2438 | .access = SNDRV_CTL_ELEM_ACCESS_READ | | |
2d3391ec TI |
2439 | SNDRV_CTL_ELEM_ACCESS_TLV_READ | |
2440 | SNDRV_CTL_ELEM_ACCESS_TLV_CALLBACK, | |
2441 | .info = pcm_chmap_ctl_info, | |
2442 | .get = pcm_chmap_ctl_get, | |
2443 | .tlv.c = pcm_chmap_ctl_tlv, | |
2444 | }; | |
2445 | int err; | |
2446 | ||
8d879be8 TI |
2447 | if (WARN_ON(pcm->streams[stream].chmap_kctl)) |
2448 | return -EBUSY; | |
2d3391ec TI |
2449 | info = kzalloc(sizeof(*info), GFP_KERNEL); |
2450 | if (!info) | |
2451 | return -ENOMEM; | |
2452 | info->pcm = pcm; | |
2453 | info->stream = stream; | |
2454 | info->chmap = chmap; | |
2455 | info->max_channels = max_channels; | |
2456 | if (stream == SNDRV_PCM_STREAM_PLAYBACK) | |
2457 | knew.name = "Playback Channel Map"; | |
2458 | else | |
2459 | knew.name = "Capture Channel Map"; | |
2460 | knew.device = pcm->device; | |
2461 | knew.count = pcm->streams[stream].substream_count; | |
2462 | knew.private_value = private_value; | |
2463 | info->kctl = snd_ctl_new1(&knew, info); | |
2464 | if (!info->kctl) { | |
2465 | kfree(info); | |
2466 | return -ENOMEM; | |
2467 | } | |
2468 | info->kctl->private_free = pcm_chmap_ctl_private_free; | |
2469 | err = snd_ctl_add(pcm->card, info->kctl); | |
2470 | if (err < 0) | |
2471 | return err; | |
2472 | pcm->streams[stream].chmap_kctl = info->kctl; | |
2473 | if (info_ret) | |
2474 | *info_ret = info; | |
2475 | return 0; | |
2476 | } | |
2477 | EXPORT_SYMBOL_GPL(snd_pcm_add_chmap_ctls); |