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) | |
fccf5388 | 45 | #define trace_applptr(substream, prev, curr) |
f5914908 TI |
46 | #endif |
47 | ||
a9cd29e7 TI |
48 | static int fill_silence_frames(struct snd_pcm_substream *substream, |
49 | snd_pcm_uframes_t off, snd_pcm_uframes_t frames); | |
50 | ||
1da177e4 LT |
51 | /* |
52 | * fill ring buffer with silence | |
53 | * runtime->silence_start: starting pointer to silence area | |
54 | * runtime->silence_filled: size filled with silence | |
55 | * runtime->silence_threshold: threshold from application | |
56 | * runtime->silence_size: maximal size from application | |
57 | * | |
58 | * when runtime->silence_size >= runtime->boundary - fill processed area with silence immediately | |
59 | */ | |
877211f5 | 60 | void snd_pcm_playback_silence(struct snd_pcm_substream *substream, snd_pcm_uframes_t new_hw_ptr) |
1da177e4 | 61 | { |
877211f5 | 62 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 | 63 | snd_pcm_uframes_t frames, ofs, transfer; |
29d1a873 | 64 | int err; |
1da177e4 LT |
65 | |
66 | if (runtime->silence_size < runtime->boundary) { | |
67 | snd_pcm_sframes_t noise_dist, n; | |
aa30db06 TI |
68 | snd_pcm_uframes_t appl_ptr = READ_ONCE(runtime->control->appl_ptr); |
69 | if (runtime->silence_start != appl_ptr) { | |
70 | n = appl_ptr - runtime->silence_start; | |
1da177e4 LT |
71 | if (n < 0) |
72 | n += runtime->boundary; | |
73 | if ((snd_pcm_uframes_t)n < runtime->silence_filled) | |
74 | runtime->silence_filled -= n; | |
75 | else | |
76 | runtime->silence_filled = 0; | |
aa30db06 | 77 | runtime->silence_start = appl_ptr; |
1da177e4 | 78 | } |
235475cb | 79 | if (runtime->silence_filled >= runtime->buffer_size) |
1da177e4 | 80 | return; |
1da177e4 LT |
81 | noise_dist = snd_pcm_playback_hw_avail(runtime) + runtime->silence_filled; |
82 | if (noise_dist >= (snd_pcm_sframes_t) runtime->silence_threshold) | |
83 | return; | |
84 | frames = runtime->silence_threshold - noise_dist; | |
85 | if (frames > runtime->silence_size) | |
86 | frames = runtime->silence_size; | |
87 | } else { | |
88 | if (new_hw_ptr == ULONG_MAX) { /* initialization */ | |
89 | snd_pcm_sframes_t avail = snd_pcm_playback_hw_avail(runtime); | |
9e216e8a JK |
90 | if (avail > runtime->buffer_size) |
91 | avail = runtime->buffer_size; | |
1da177e4 LT |
92 | runtime->silence_filled = avail > 0 ? avail : 0; |
93 | runtime->silence_start = (runtime->status->hw_ptr + | |
94 | runtime->silence_filled) % | |
95 | runtime->boundary; | |
96 | } else { | |
97 | ofs = runtime->status->hw_ptr; | |
98 | frames = new_hw_ptr - ofs; | |
99 | if ((snd_pcm_sframes_t)frames < 0) | |
100 | frames += runtime->boundary; | |
101 | runtime->silence_filled -= frames; | |
102 | if ((snd_pcm_sframes_t)runtime->silence_filled < 0) { | |
103 | runtime->silence_filled = 0; | |
9a826ddb | 104 | runtime->silence_start = new_hw_ptr; |
1da177e4 | 105 | } else { |
9a826ddb | 106 | runtime->silence_start = ofs; |
1da177e4 | 107 | } |
1da177e4 LT |
108 | } |
109 | frames = runtime->buffer_size - runtime->silence_filled; | |
110 | } | |
7eaa943c TI |
111 | if (snd_BUG_ON(frames > runtime->buffer_size)) |
112 | return; | |
1da177e4 LT |
113 | if (frames == 0) |
114 | return; | |
9a826ddb | 115 | ofs = runtime->silence_start % runtime->buffer_size; |
1da177e4 LT |
116 | while (frames > 0) { |
117 | transfer = ofs + frames > runtime->buffer_size ? runtime->buffer_size - ofs : frames; | |
a9cd29e7 TI |
118 | err = fill_silence_frames(substream, ofs, transfer); |
119 | snd_BUG_ON(err < 0); | |
1da177e4 LT |
120 | runtime->silence_filled += transfer; |
121 | frames -= transfer; | |
122 | ofs = 0; | |
123 | } | |
124 | } | |
125 | ||
acb03d44 EB |
126 | #ifdef CONFIG_SND_DEBUG |
127 | void snd_pcm_debug_name(struct snd_pcm_substream *substream, | |
c0070110 TI |
128 | char *name, size_t len) |
129 | { | |
130 | snprintf(name, len, "pcmC%dD%d%c:%d", | |
131 | substream->pcm->card->number, | |
132 | substream->pcm->device, | |
133 | substream->stream ? 'c' : 'p', | |
134 | substream->number); | |
135 | } | |
acb03d44 EB |
136 | EXPORT_SYMBOL(snd_pcm_debug_name); |
137 | #endif | |
c0070110 | 138 | |
741b20cf JK |
139 | #define XRUN_DEBUG_BASIC (1<<0) |
140 | #define XRUN_DEBUG_STACK (1<<1) /* dump also stack */ | |
141 | #define XRUN_DEBUG_JIFFIESCHECK (1<<2) /* do jiffies check */ | |
741b20cf | 142 | |
ed3da3d9 | 143 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
4d96eb25 | 144 | |
741b20cf JK |
145 | #define xrun_debug(substream, mask) \ |
146 | ((substream)->pstr->xrun_debug & (mask)) | |
0f17014b JN |
147 | #else |
148 | #define xrun_debug(substream, mask) 0 | |
149 | #endif | |
ed3da3d9 | 150 | |
741b20cf JK |
151 | #define dump_stack_on_xrun(substream) do { \ |
152 | if (xrun_debug(substream, XRUN_DEBUG_STACK)) \ | |
153 | dump_stack(); \ | |
ed3da3d9 TI |
154 | } while (0) |
155 | ||
877211f5 | 156 | static void xrun(struct snd_pcm_substream *substream) |
1da177e4 | 157 | { |
13f040f9 JK |
158 | struct snd_pcm_runtime *runtime = substream->runtime; |
159 | ||
f5914908 | 160 | trace_xrun(substream); |
13f040f9 JK |
161 | if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) |
162 | snd_pcm_gettime(runtime, (struct timespec *)&runtime->status->tstamp); | |
1da177e4 | 163 | snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN); |
741b20cf | 164 | if (xrun_debug(substream, XRUN_DEBUG_BASIC)) { |
c0070110 | 165 | char name[16]; |
acb03d44 | 166 | snd_pcm_debug_name(substream, name, sizeof(name)); |
09e56df8 | 167 | pcm_warn(substream->pcm, "XRUN: %s\n", name); |
ed3da3d9 | 168 | dump_stack_on_xrun(substream); |
1da177e4 | 169 | } |
1da177e4 LT |
170 | } |
171 | ||
0f17014b | 172 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
f5914908 | 173 | #define hw_ptr_error(substream, in_interrupt, reason, fmt, args...) \ |
4d96eb25 | 174 | do { \ |
f5914908 | 175 | trace_hw_ptr_error(substream, reason); \ |
4d96eb25 | 176 | if (xrun_debug(substream, XRUN_DEBUG_BASIC)) { \ |
f5914908 TI |
177 | pr_err_ratelimited("ALSA: PCM: [%c] " reason ": " fmt, \ |
178 | (in_interrupt) ? 'Q' : 'P', ##args); \ | |
4d96eb25 JK |
179 | dump_stack_on_xrun(substream); \ |
180 | } \ | |
181 | } while (0) | |
182 | ||
4d96eb25 JK |
183 | #else /* ! CONFIG_SND_PCM_XRUN_DEBUG */ |
184 | ||
4d96eb25 | 185 | #define hw_ptr_error(substream, fmt, args...) do { } while (0) |
4d96eb25 JK |
186 | |
187 | #endif | |
188 | ||
1250932e JK |
189 | int snd_pcm_update_state(struct snd_pcm_substream *substream, |
190 | struct snd_pcm_runtime *runtime) | |
1da177e4 LT |
191 | { |
192 | snd_pcm_uframes_t avail; | |
193 | ||
194 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) | |
195 | avail = snd_pcm_playback_avail(runtime); | |
196 | else | |
197 | avail = snd_pcm_capture_avail(runtime); | |
198 | if (avail > runtime->avail_max) | |
199 | runtime->avail_max = avail; | |
4cdc115f TI |
200 | if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) { |
201 | if (avail >= runtime->buffer_size) { | |
1da177e4 | 202 | snd_pcm_drain_done(substream); |
4cdc115f TI |
203 | return -EPIPE; |
204 | } | |
205 | } else { | |
206 | if (avail >= runtime->stop_threshold) { | |
1da177e4 | 207 | xrun(substream); |
4cdc115f TI |
208 | return -EPIPE; |
209 | } | |
1da177e4 | 210 | } |
5daeba34 DD |
211 | if (runtime->twake) { |
212 | if (avail >= runtime->twake) | |
213 | wake_up(&runtime->tsleep); | |
214 | } else if (avail >= runtime->control->avail_min) | |
215 | wake_up(&runtime->sleep); | |
1da177e4 LT |
216 | return 0; |
217 | } | |
218 | ||
3179f620 PLB |
219 | static void update_audio_tstamp(struct snd_pcm_substream *substream, |
220 | struct timespec *curr_tstamp, | |
221 | struct timespec *audio_tstamp) | |
222 | { | |
223 | struct snd_pcm_runtime *runtime = substream->runtime; | |
224 | u64 audio_frames, audio_nsecs; | |
225 | struct timespec driver_tstamp; | |
226 | ||
227 | if (runtime->tstamp_mode != SNDRV_PCM_TSTAMP_ENABLE) | |
228 | return; | |
229 | ||
230 | if (!(substream->ops->get_time_info) || | |
231 | (runtime->audio_tstamp_report.actual_type == | |
232 | SNDRV_PCM_AUDIO_TSTAMP_TYPE_DEFAULT)) { | |
233 | ||
234 | /* | |
235 | * provide audio timestamp derived from pointer position | |
236 | * add delay only if requested | |
237 | */ | |
238 | ||
239 | audio_frames = runtime->hw_ptr_wrap + runtime->status->hw_ptr; | |
240 | ||
241 | if (runtime->audio_tstamp_config.report_delay) { | |
242 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) | |
243 | audio_frames -= runtime->delay; | |
244 | else | |
245 | audio_frames += runtime->delay; | |
246 | } | |
247 | audio_nsecs = div_u64(audio_frames * 1000000000LL, | |
248 | runtime->rate); | |
249 | *audio_tstamp = ns_to_timespec(audio_nsecs); | |
250 | } | |
20e3f985 HE |
251 | if (!timespec_equal(&runtime->status->audio_tstamp, audio_tstamp)) { |
252 | runtime->status->audio_tstamp = *audio_tstamp; | |
253 | runtime->status->tstamp = *curr_tstamp; | |
254 | } | |
3179f620 PLB |
255 | |
256 | /* | |
257 | * re-take a driver timestamp to let apps detect if the reference tstamp | |
258 | * read by low-level hardware was provided with a delay | |
259 | */ | |
260 | snd_pcm_gettime(substream->runtime, (struct timespec *)&driver_tstamp); | |
261 | runtime->driver_tstamp = driver_tstamp; | |
262 | } | |
263 | ||
f240406b JK |
264 | static int snd_pcm_update_hw_ptr0(struct snd_pcm_substream *substream, |
265 | unsigned int in_interrupt) | |
1da177e4 | 266 | { |
877211f5 | 267 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 | 268 | snd_pcm_uframes_t pos; |
f240406b | 269 | snd_pcm_uframes_t old_hw_ptr, new_hw_ptr, hw_base; |
bbf6ad13 JK |
270 | snd_pcm_sframes_t hdelta, delta; |
271 | unsigned long jdelta; | |
3509a03f PLB |
272 | unsigned long curr_jiffies; |
273 | struct timespec curr_tstamp; | |
4eeaaeae | 274 | struct timespec audio_tstamp; |
0e8014d7 | 275 | int crossed_boundary = 0; |
1da177e4 | 276 | |
bbf6ad13 | 277 | old_hw_ptr = runtime->status->hw_ptr; |
3509a03f PLB |
278 | |
279 | /* | |
280 | * group pointer, time and jiffies reads to allow for more | |
281 | * accurate correlations/corrections. | |
282 | * The values are stored at the end of this routine after | |
283 | * corrections for hw_ptr position | |
284 | */ | |
f240406b | 285 | pos = substream->ops->pointer(substream); |
3509a03f | 286 | curr_jiffies = jiffies; |
4eeaaeae | 287 | if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) { |
3179f620 PLB |
288 | if ((substream->ops->get_time_info) && |
289 | (runtime->audio_tstamp_config.type_requested != SNDRV_PCM_AUDIO_TSTAMP_TYPE_DEFAULT)) { | |
290 | substream->ops->get_time_info(substream, &curr_tstamp, | |
291 | &audio_tstamp, | |
292 | &runtime->audio_tstamp_config, | |
293 | &runtime->audio_tstamp_report); | |
294 | ||
295 | /* re-test in case tstamp type is not supported in hardware and was demoted to DEFAULT */ | |
296 | if (runtime->audio_tstamp_report.actual_type == SNDRV_PCM_AUDIO_TSTAMP_TYPE_DEFAULT) | |
297 | snd_pcm_gettime(runtime, (struct timespec *)&curr_tstamp); | |
298 | } else | |
299 | snd_pcm_gettime(runtime, (struct timespec *)&curr_tstamp); | |
4eeaaeae PLB |
300 | } |
301 | ||
1da177e4 LT |
302 | if (pos == SNDRV_PCM_POS_XRUN) { |
303 | xrun(substream); | |
304 | return -EPIPE; | |
305 | } | |
f240406b | 306 | if (pos >= runtime->buffer_size) { |
09e56df8 | 307 | if (printk_ratelimit()) { |
f240406b | 308 | char name[16]; |
acb03d44 | 309 | snd_pcm_debug_name(substream, name, sizeof(name)); |
09e56df8 | 310 | pcm_err(substream->pcm, |
0ab1ace8 | 311 | "invalid position: %s, pos = %ld, buffer size = %ld, period size = %ld\n", |
09e56df8 TI |
312 | name, pos, runtime->buffer_size, |
313 | runtime->period_size); | |
f240406b JK |
314 | } |
315 | pos = 0; | |
cedb8118 | 316 | } |
f240406b | 317 | pos -= pos % runtime->min_align; |
f5914908 | 318 | trace_hwptr(substream, pos, in_interrupt); |
ed3da3d9 TI |
319 | hw_base = runtime->hw_ptr_base; |
320 | new_hw_ptr = hw_base + pos; | |
f240406b JK |
321 | if (in_interrupt) { |
322 | /* we know that one period was processed */ | |
323 | /* delta = "expected next hw_ptr" for in_interrupt != 0 */ | |
e7636925 | 324 | delta = runtime->hw_ptr_interrupt + runtime->period_size; |
f240406b | 325 | if (delta > new_hw_ptr) { |
bd76af0f | 326 | /* check for double acknowledged interrupts */ |
3509a03f | 327 | hdelta = curr_jiffies - runtime->hw_ptr_jiffies; |
13a98839 | 328 | if (hdelta > runtime->hw_ptr_buffer_jiffies/2 + 1) { |
bd76af0f | 329 | hw_base += runtime->buffer_size; |
0e8014d7 | 330 | if (hw_base >= runtime->boundary) { |
bd76af0f | 331 | hw_base = 0; |
0e8014d7 PLB |
332 | crossed_boundary++; |
333 | } | |
bd76af0f JK |
334 | new_hw_ptr = hw_base + pos; |
335 | goto __delta; | |
336 | } | |
1da177e4 | 337 | } |
1da177e4 | 338 | } |
f240406b JK |
339 | /* new_hw_ptr might be lower than old_hw_ptr in case when */ |
340 | /* pointer crosses the end of the ring buffer */ | |
341 | if (new_hw_ptr < old_hw_ptr) { | |
342 | hw_base += runtime->buffer_size; | |
0e8014d7 | 343 | if (hw_base >= runtime->boundary) { |
f240406b | 344 | hw_base = 0; |
0e8014d7 PLB |
345 | crossed_boundary++; |
346 | } | |
f240406b JK |
347 | new_hw_ptr = hw_base + pos; |
348 | } | |
349 | __delta: | |
b406e610 CL |
350 | delta = new_hw_ptr - old_hw_ptr; |
351 | if (delta < 0) | |
352 | delta += runtime->boundary; | |
ab69a490 | 353 | |
59ff878f | 354 | if (runtime->no_period_wakeup) { |
12ff414e | 355 | snd_pcm_sframes_t xrun_threshold; |
59ff878f CL |
356 | /* |
357 | * Without regular period interrupts, we have to check | |
358 | * the elapsed time to detect xruns. | |
359 | */ | |
3509a03f | 360 | jdelta = curr_jiffies - runtime->hw_ptr_jiffies; |
47228e48 CL |
361 | if (jdelta < runtime->hw_ptr_buffer_jiffies / 2) |
362 | goto no_delta_check; | |
59ff878f | 363 | hdelta = jdelta - delta * HZ / runtime->rate; |
12ff414e KA |
364 | xrun_threshold = runtime->hw_ptr_buffer_jiffies / 2 + 1; |
365 | while (hdelta > xrun_threshold) { | |
59ff878f CL |
366 | delta += runtime->buffer_size; |
367 | hw_base += runtime->buffer_size; | |
0e8014d7 | 368 | if (hw_base >= runtime->boundary) { |
59ff878f | 369 | hw_base = 0; |
0e8014d7 PLB |
370 | crossed_boundary++; |
371 | } | |
59ff878f CL |
372 | new_hw_ptr = hw_base + pos; |
373 | hdelta -= runtime->hw_ptr_buffer_jiffies; | |
374 | } | |
ab69a490 | 375 | goto no_delta_check; |
59ff878f | 376 | } |
ab69a490 | 377 | |
f240406b | 378 | /* something must be really wrong */ |
7b3a177b | 379 | if (delta >= runtime->buffer_size + runtime->period_size) { |
f5914908 TI |
380 | hw_ptr_error(substream, in_interrupt, "Unexpected hw_ptr", |
381 | "(stream=%i, pos=%ld, new_hw_ptr=%ld, old_hw_ptr=%ld)\n", | |
382 | substream->stream, (long)pos, | |
383 | (long)new_hw_ptr, (long)old_hw_ptr); | |
f240406b JK |
384 | return 0; |
385 | } | |
c87d9732 TI |
386 | |
387 | /* Do jiffies check only in xrun_debug mode */ | |
741b20cf | 388 | if (!xrun_debug(substream, XRUN_DEBUG_JIFFIESCHECK)) |
c87d9732 TI |
389 | goto no_jiffies_check; |
390 | ||
3e5b5016 TI |
391 | /* Skip the jiffies check for hardwares with BATCH flag. |
392 | * Such hardware usually just increases the position at each IRQ, | |
393 | * thus it can't give any strange position. | |
394 | */ | |
395 | if (runtime->hw.info & SNDRV_PCM_INFO_BATCH) | |
396 | goto no_jiffies_check; | |
f240406b | 397 | hdelta = delta; |
a4444da3 JK |
398 | if (hdelta < runtime->delay) |
399 | goto no_jiffies_check; | |
400 | hdelta -= runtime->delay; | |
3509a03f | 401 | jdelta = curr_jiffies - runtime->hw_ptr_jiffies; |
bbf6ad13 JK |
402 | if (((hdelta * HZ) / runtime->rate) > jdelta + HZ/100) { |
403 | delta = jdelta / | |
404 | (((runtime->period_size * HZ) / runtime->rate) | |
405 | + HZ/100); | |
f240406b JK |
406 | /* move new_hw_ptr according jiffies not pos variable */ |
407 | new_hw_ptr = old_hw_ptr; | |
ed69c6a8 | 408 | hw_base = delta; |
f240406b JK |
409 | /* use loop to avoid checks for delta overflows */ |
410 | /* the delta value is small or zero in most cases */ | |
411 | while (delta > 0) { | |
412 | new_hw_ptr += runtime->period_size; | |
0e8014d7 | 413 | if (new_hw_ptr >= runtime->boundary) { |
f240406b | 414 | new_hw_ptr -= runtime->boundary; |
0e8014d7 PLB |
415 | crossed_boundary--; |
416 | } | |
f240406b JK |
417 | delta--; |
418 | } | |
419 | /* align hw_base to buffer_size */ | |
f5914908 TI |
420 | hw_ptr_error(substream, in_interrupt, "hw_ptr skipping", |
421 | "(pos=%ld, delta=%ld, period=%ld, jdelta=%lu/%lu/%lu, hw_ptr=%ld/%ld)\n", | |
bbf6ad13 JK |
422 | (long)pos, (long)hdelta, |
423 | (long)runtime->period_size, jdelta, | |
ed69c6a8 | 424 | ((hdelta * HZ) / runtime->rate), hw_base, |
f240406b JK |
425 | (unsigned long)old_hw_ptr, |
426 | (unsigned long)new_hw_ptr); | |
ed69c6a8 JK |
427 | /* reset values to proper state */ |
428 | delta = 0; | |
429 | hw_base = new_hw_ptr - (new_hw_ptr % runtime->buffer_size); | |
bbf6ad13 | 430 | } |
3e5b5016 | 431 | no_jiffies_check: |
bbf6ad13 | 432 | if (delta > runtime->period_size + runtime->period_size / 2) { |
f5914908 TI |
433 | hw_ptr_error(substream, in_interrupt, |
434 | "Lost interrupts?", | |
435 | "(stream=%i, delta=%ld, new_hw_ptr=%ld, old_hw_ptr=%ld)\n", | |
ed3da3d9 | 436 | substream->stream, (long)delta, |
f240406b JK |
437 | (long)new_hw_ptr, |
438 | (long)old_hw_ptr); | |
ed3da3d9 | 439 | } |
f240406b | 440 | |
ab69a490 | 441 | no_delta_check: |
3179f620 PLB |
442 | if (runtime->status->hw_ptr == new_hw_ptr) { |
443 | update_audio_tstamp(substream, &curr_tstamp, &audio_tstamp); | |
f240406b | 444 | return 0; |
3179f620 | 445 | } |
ab1863fc | 446 | |
1da177e4 LT |
447 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && |
448 | runtime->silence_size > 0) | |
449 | snd_pcm_playback_silence(substream, new_hw_ptr); | |
450 | ||
e7636925 | 451 | if (in_interrupt) { |
ead4046b CL |
452 | delta = new_hw_ptr - runtime->hw_ptr_interrupt; |
453 | if (delta < 0) | |
454 | delta += runtime->boundary; | |
455 | delta -= (snd_pcm_uframes_t)delta % runtime->period_size; | |
456 | runtime->hw_ptr_interrupt += delta; | |
457 | if (runtime->hw_ptr_interrupt >= runtime->boundary) | |
458 | runtime->hw_ptr_interrupt -= runtime->boundary; | |
e7636925 | 459 | } |
ed3da3d9 | 460 | runtime->hw_ptr_base = hw_base; |
1da177e4 | 461 | runtime->status->hw_ptr = new_hw_ptr; |
3509a03f | 462 | runtime->hw_ptr_jiffies = curr_jiffies; |
0e8014d7 PLB |
463 | if (crossed_boundary) { |
464 | snd_BUG_ON(crossed_boundary != 1); | |
465 | runtime->hw_ptr_wrap += runtime->boundary; | |
466 | } | |
4eeaaeae | 467 | |
3179f620 | 468 | update_audio_tstamp(substream, &curr_tstamp, &audio_tstamp); |
4eeaaeae | 469 | |
1250932e | 470 | return snd_pcm_update_state(substream, runtime); |
1da177e4 LT |
471 | } |
472 | ||
473 | /* CAUTION: call it with irq disabled */ | |
877211f5 | 474 | int snd_pcm_update_hw_ptr(struct snd_pcm_substream *substream) |
1da177e4 | 475 | { |
f240406b | 476 | return snd_pcm_update_hw_ptr0(substream, 0); |
1da177e4 LT |
477 | } |
478 | ||
479 | /** | |
480 | * snd_pcm_set_ops - set the PCM operators | |
481 | * @pcm: the pcm instance | |
482 | * @direction: stream direction, SNDRV_PCM_STREAM_XXX | |
483 | * @ops: the operator table | |
484 | * | |
485 | * Sets the given PCM operators to the pcm instance. | |
486 | */ | |
e6c2e7eb LPC |
487 | void snd_pcm_set_ops(struct snd_pcm *pcm, int direction, |
488 | const struct snd_pcm_ops *ops) | |
1da177e4 | 489 | { |
877211f5 TI |
490 | struct snd_pcm_str *stream = &pcm->streams[direction]; |
491 | struct snd_pcm_substream *substream; | |
1da177e4 LT |
492 | |
493 | for (substream = stream->substream; substream != NULL; substream = substream->next) | |
494 | substream->ops = ops; | |
495 | } | |
e88e8ae6 | 496 | EXPORT_SYMBOL(snd_pcm_set_ops); |
1da177e4 LT |
497 | |
498 | /** | |
499 | * snd_pcm_sync - set the PCM sync id | |
500 | * @substream: the pcm substream | |
501 | * | |
502 | * Sets the PCM sync identifier for the card. | |
503 | */ | |
877211f5 | 504 | void snd_pcm_set_sync(struct snd_pcm_substream *substream) |
1da177e4 | 505 | { |
877211f5 | 506 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
507 | |
508 | runtime->sync.id32[0] = substream->pcm->card->number; | |
509 | runtime->sync.id32[1] = -1; | |
510 | runtime->sync.id32[2] = -1; | |
511 | runtime->sync.id32[3] = -1; | |
512 | } | |
e88e8ae6 TI |
513 | EXPORT_SYMBOL(snd_pcm_set_sync); |
514 | ||
1da177e4 LT |
515 | /* |
516 | * Standard ioctl routine | |
517 | */ | |
518 | ||
1da177e4 LT |
519 | static inline unsigned int div32(unsigned int a, unsigned int b, |
520 | unsigned int *r) | |
521 | { | |
522 | if (b == 0) { | |
523 | *r = 0; | |
524 | return UINT_MAX; | |
525 | } | |
526 | *r = a % b; | |
527 | return a / b; | |
528 | } | |
529 | ||
530 | static inline unsigned int div_down(unsigned int a, unsigned int b) | |
531 | { | |
532 | if (b == 0) | |
533 | return UINT_MAX; | |
534 | return a / b; | |
535 | } | |
536 | ||
537 | static inline unsigned int div_up(unsigned int a, unsigned int b) | |
538 | { | |
539 | unsigned int r; | |
540 | unsigned int q; | |
541 | if (b == 0) | |
542 | return UINT_MAX; | |
543 | q = div32(a, b, &r); | |
544 | if (r) | |
545 | ++q; | |
546 | return q; | |
547 | } | |
548 | ||
549 | static inline unsigned int mul(unsigned int a, unsigned int b) | |
550 | { | |
551 | if (a == 0) | |
552 | return 0; | |
553 | if (div_down(UINT_MAX, a) < b) | |
554 | return UINT_MAX; | |
555 | return a * b; | |
556 | } | |
557 | ||
558 | static inline unsigned int muldiv32(unsigned int a, unsigned int b, | |
559 | unsigned int c, unsigned int *r) | |
560 | { | |
561 | u_int64_t n = (u_int64_t) a * b; | |
562 | if (c == 0) { | |
7eaa943c | 563 | snd_BUG_ON(!n); |
1da177e4 LT |
564 | *r = 0; |
565 | return UINT_MAX; | |
566 | } | |
3f7440a6 | 567 | n = div_u64_rem(n, c, r); |
1da177e4 LT |
568 | if (n >= UINT_MAX) { |
569 | *r = 0; | |
570 | return UINT_MAX; | |
571 | } | |
572 | return n; | |
573 | } | |
574 | ||
1da177e4 LT |
575 | /** |
576 | * snd_interval_refine - refine the interval value of configurator | |
577 | * @i: the interval value to refine | |
578 | * @v: the interval value to refer to | |
579 | * | |
580 | * Refines the interval value with the reference value. | |
581 | * The interval is changed to the range satisfying both intervals. | |
582 | * The interval status (min, max, integer, etc.) are evaluated. | |
583 | * | |
eb7c06e8 YB |
584 | * Return: Positive if the value is changed, zero if it's not changed, or a |
585 | * negative error code. | |
1da177e4 | 586 | */ |
877211f5 | 587 | int snd_interval_refine(struct snd_interval *i, const struct snd_interval *v) |
1da177e4 LT |
588 | { |
589 | int changed = 0; | |
7eaa943c TI |
590 | if (snd_BUG_ON(snd_interval_empty(i))) |
591 | return -EINVAL; | |
1da177e4 LT |
592 | if (i->min < v->min) { |
593 | i->min = v->min; | |
594 | i->openmin = v->openmin; | |
595 | changed = 1; | |
596 | } else if (i->min == v->min && !i->openmin && v->openmin) { | |
597 | i->openmin = 1; | |
598 | changed = 1; | |
599 | } | |
600 | if (i->max > v->max) { | |
601 | i->max = v->max; | |
602 | i->openmax = v->openmax; | |
603 | changed = 1; | |
604 | } else if (i->max == v->max && !i->openmax && v->openmax) { | |
605 | i->openmax = 1; | |
606 | changed = 1; | |
607 | } | |
608 | if (!i->integer && v->integer) { | |
609 | i->integer = 1; | |
610 | changed = 1; | |
611 | } | |
612 | if (i->integer) { | |
613 | if (i->openmin) { | |
614 | i->min++; | |
615 | i->openmin = 0; | |
616 | } | |
617 | if (i->openmax) { | |
618 | i->max--; | |
619 | i->openmax = 0; | |
620 | } | |
621 | } else if (!i->openmin && !i->openmax && i->min == i->max) | |
622 | i->integer = 1; | |
623 | if (snd_interval_checkempty(i)) { | |
624 | snd_interval_none(i); | |
625 | return -EINVAL; | |
626 | } | |
627 | return changed; | |
628 | } | |
e88e8ae6 TI |
629 | EXPORT_SYMBOL(snd_interval_refine); |
630 | ||
877211f5 | 631 | static int snd_interval_refine_first(struct snd_interval *i) |
1da177e4 | 632 | { |
7eaa943c TI |
633 | if (snd_BUG_ON(snd_interval_empty(i))) |
634 | return -EINVAL; | |
1da177e4 LT |
635 | if (snd_interval_single(i)) |
636 | return 0; | |
637 | i->max = i->min; | |
638 | i->openmax = i->openmin; | |
639 | if (i->openmax) | |
640 | i->max++; | |
641 | return 1; | |
642 | } | |
643 | ||
877211f5 | 644 | static int snd_interval_refine_last(struct snd_interval *i) |
1da177e4 | 645 | { |
7eaa943c TI |
646 | if (snd_BUG_ON(snd_interval_empty(i))) |
647 | return -EINVAL; | |
1da177e4 LT |
648 | if (snd_interval_single(i)) |
649 | return 0; | |
650 | i->min = i->max; | |
651 | i->openmin = i->openmax; | |
652 | if (i->openmin) | |
653 | i->min--; | |
654 | return 1; | |
655 | } | |
656 | ||
877211f5 | 657 | void snd_interval_mul(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c) |
1da177e4 LT |
658 | { |
659 | if (a->empty || b->empty) { | |
660 | snd_interval_none(c); | |
661 | return; | |
662 | } | |
663 | c->empty = 0; | |
664 | c->min = mul(a->min, b->min); | |
665 | c->openmin = (a->openmin || b->openmin); | |
666 | c->max = mul(a->max, b->max); | |
667 | c->openmax = (a->openmax || b->openmax); | |
668 | c->integer = (a->integer && b->integer); | |
669 | } | |
670 | ||
671 | /** | |
672 | * snd_interval_div - refine the interval value with division | |
df8db936 TI |
673 | * @a: dividend |
674 | * @b: divisor | |
675 | * @c: quotient | |
1da177e4 LT |
676 | * |
677 | * c = a / b | |
678 | * | |
679 | * Returns non-zero if the value is changed, zero if not changed. | |
680 | */ | |
877211f5 | 681 | void snd_interval_div(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c) |
1da177e4 LT |
682 | { |
683 | unsigned int r; | |
684 | if (a->empty || b->empty) { | |
685 | snd_interval_none(c); | |
686 | return; | |
687 | } | |
688 | c->empty = 0; | |
689 | c->min = div32(a->min, b->max, &r); | |
690 | c->openmin = (r || a->openmin || b->openmax); | |
691 | if (b->min > 0) { | |
692 | c->max = div32(a->max, b->min, &r); | |
693 | if (r) { | |
694 | c->max++; | |
695 | c->openmax = 1; | |
696 | } else | |
697 | c->openmax = (a->openmax || b->openmin); | |
698 | } else { | |
699 | c->max = UINT_MAX; | |
700 | c->openmax = 0; | |
701 | } | |
702 | c->integer = 0; | |
703 | } | |
704 | ||
705 | /** | |
706 | * snd_interval_muldivk - refine the interval value | |
df8db936 TI |
707 | * @a: dividend 1 |
708 | * @b: dividend 2 | |
709 | * @k: divisor (as integer) | |
710 | * @c: result | |
711 | * | |
1da177e4 LT |
712 | * c = a * b / k |
713 | * | |
714 | * Returns non-zero if the value is changed, zero if not changed. | |
715 | */ | |
877211f5 TI |
716 | void snd_interval_muldivk(const struct snd_interval *a, const struct snd_interval *b, |
717 | unsigned int k, struct snd_interval *c) | |
1da177e4 LT |
718 | { |
719 | unsigned int r; | |
720 | if (a->empty || b->empty) { | |
721 | snd_interval_none(c); | |
722 | return; | |
723 | } | |
724 | c->empty = 0; | |
725 | c->min = muldiv32(a->min, b->min, k, &r); | |
726 | c->openmin = (r || a->openmin || b->openmin); | |
727 | c->max = muldiv32(a->max, b->max, k, &r); | |
728 | if (r) { | |
729 | c->max++; | |
730 | c->openmax = 1; | |
731 | } else | |
732 | c->openmax = (a->openmax || b->openmax); | |
733 | c->integer = 0; | |
734 | } | |
735 | ||
736 | /** | |
737 | * snd_interval_mulkdiv - refine the interval value | |
df8db936 TI |
738 | * @a: dividend 1 |
739 | * @k: dividend 2 (as integer) | |
740 | * @b: divisor | |
741 | * @c: result | |
1da177e4 LT |
742 | * |
743 | * c = a * k / b | |
744 | * | |
745 | * Returns non-zero if the value is changed, zero if not changed. | |
746 | */ | |
877211f5 TI |
747 | void snd_interval_mulkdiv(const struct snd_interval *a, unsigned int k, |
748 | const struct snd_interval *b, struct snd_interval *c) | |
1da177e4 LT |
749 | { |
750 | unsigned int r; | |
751 | if (a->empty || b->empty) { | |
752 | snd_interval_none(c); | |
753 | return; | |
754 | } | |
755 | c->empty = 0; | |
756 | c->min = muldiv32(a->min, k, b->max, &r); | |
757 | c->openmin = (r || a->openmin || b->openmax); | |
758 | if (b->min > 0) { | |
759 | c->max = muldiv32(a->max, k, b->min, &r); | |
760 | if (r) { | |
761 | c->max++; | |
762 | c->openmax = 1; | |
763 | } else | |
764 | c->openmax = (a->openmax || b->openmin); | |
765 | } else { | |
766 | c->max = UINT_MAX; | |
767 | c->openmax = 0; | |
768 | } | |
769 | c->integer = 0; | |
770 | } | |
771 | ||
1da177e4 LT |
772 | /* ---- */ |
773 | ||
774 | ||
775 | /** | |
776 | * snd_interval_ratnum - refine the interval value | |
df8db936 TI |
777 | * @i: interval to refine |
778 | * @rats_count: number of ratnum_t | |
779 | * @rats: ratnum_t array | |
780 | * @nump: pointer to store the resultant numerator | |
781 | * @denp: pointer to store the resultant denominator | |
1da177e4 | 782 | * |
eb7c06e8 YB |
783 | * Return: Positive if the value is changed, zero if it's not changed, or a |
784 | * negative error code. | |
1da177e4 | 785 | */ |
877211f5 | 786 | int snd_interval_ratnum(struct snd_interval *i, |
e5e113cf | 787 | unsigned int rats_count, const struct snd_ratnum *rats, |
877211f5 | 788 | unsigned int *nump, unsigned int *denp) |
1da177e4 | 789 | { |
8374e24c KH |
790 | unsigned int best_num, best_den; |
791 | int best_diff; | |
1da177e4 | 792 | unsigned int k; |
877211f5 | 793 | struct snd_interval t; |
1da177e4 | 794 | int err; |
8374e24c KH |
795 | unsigned int result_num, result_den; |
796 | int result_diff; | |
1da177e4 LT |
797 | |
798 | best_num = best_den = best_diff = 0; | |
799 | for (k = 0; k < rats_count; ++k) { | |
800 | unsigned int num = rats[k].num; | |
801 | unsigned int den; | |
802 | unsigned int q = i->min; | |
803 | int diff; | |
804 | if (q == 0) | |
805 | q = 1; | |
40962d7c | 806 | den = div_up(num, q); |
1da177e4 LT |
807 | if (den < rats[k].den_min) |
808 | continue; | |
809 | if (den > rats[k].den_max) | |
810 | den = rats[k].den_max; | |
811 | else { | |
812 | unsigned int r; | |
813 | r = (den - rats[k].den_min) % rats[k].den_step; | |
814 | if (r != 0) | |
815 | den -= r; | |
816 | } | |
817 | diff = num - q * den; | |
8374e24c KH |
818 | if (diff < 0) |
819 | diff = -diff; | |
1da177e4 LT |
820 | if (best_num == 0 || |
821 | diff * best_den < best_diff * den) { | |
822 | best_diff = diff; | |
823 | best_den = den; | |
824 | best_num = num; | |
825 | } | |
826 | } | |
827 | if (best_den == 0) { | |
828 | i->empty = 1; | |
829 | return -EINVAL; | |
830 | } | |
831 | t.min = div_down(best_num, best_den); | |
832 | t.openmin = !!(best_num % best_den); | |
833 | ||
8374e24c KH |
834 | result_num = best_num; |
835 | result_diff = best_diff; | |
836 | result_den = best_den; | |
1da177e4 LT |
837 | best_num = best_den = best_diff = 0; |
838 | for (k = 0; k < rats_count; ++k) { | |
839 | unsigned int num = rats[k].num; | |
840 | unsigned int den; | |
841 | unsigned int q = i->max; | |
842 | int diff; | |
843 | if (q == 0) { | |
844 | i->empty = 1; | |
845 | return -EINVAL; | |
846 | } | |
40962d7c | 847 | den = div_down(num, q); |
1da177e4 LT |
848 | if (den > rats[k].den_max) |
849 | continue; | |
850 | if (den < rats[k].den_min) | |
851 | den = rats[k].den_min; | |
852 | else { | |
853 | unsigned int r; | |
854 | r = (den - rats[k].den_min) % rats[k].den_step; | |
855 | if (r != 0) | |
856 | den += rats[k].den_step - r; | |
857 | } | |
858 | diff = q * den - num; | |
8374e24c KH |
859 | if (diff < 0) |
860 | diff = -diff; | |
1da177e4 LT |
861 | if (best_num == 0 || |
862 | diff * best_den < best_diff * den) { | |
863 | best_diff = diff; | |
864 | best_den = den; | |
865 | best_num = num; | |
866 | } | |
867 | } | |
868 | if (best_den == 0) { | |
869 | i->empty = 1; | |
870 | return -EINVAL; | |
871 | } | |
872 | t.max = div_up(best_num, best_den); | |
873 | t.openmax = !!(best_num % best_den); | |
874 | t.integer = 0; | |
875 | err = snd_interval_refine(i, &t); | |
876 | if (err < 0) | |
877 | return err; | |
878 | ||
879 | if (snd_interval_single(i)) { | |
8374e24c KH |
880 | if (best_diff * result_den < result_diff * best_den) { |
881 | result_num = best_num; | |
882 | result_den = best_den; | |
883 | } | |
1da177e4 | 884 | if (nump) |
8374e24c | 885 | *nump = result_num; |
1da177e4 | 886 | if (denp) |
8374e24c | 887 | *denp = result_den; |
1da177e4 LT |
888 | } |
889 | return err; | |
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 | 1027 | } |
e88e8ae6 TI |
1028 | EXPORT_SYMBOL(snd_interval_list); |
1029 | ||
f66f898e PR |
1030 | /** |
1031 | * snd_interval_ranges - refine the interval value from the list of ranges | |
1032 | * @i: the interval value to refine | |
1033 | * @count: the number of elements in the list of ranges | |
1034 | * @ranges: the ranges list | |
1035 | * @mask: the bit-mask to evaluate | |
1036 | * | |
1037 | * Refines the interval value from the list of ranges. | |
1038 | * When mask is non-zero, only the elements corresponding to bit 1 are | |
1039 | * evaluated. | |
1040 | * | |
1041 | * Return: Positive if the value is changed, zero if it's not changed, or a | |
1042 | * negative error code. | |
1043 | */ | |
1044 | int snd_interval_ranges(struct snd_interval *i, unsigned int count, | |
1045 | const struct snd_interval *ranges, unsigned int mask) | |
1046 | { | |
1047 | unsigned int k; | |
1048 | struct snd_interval range_union; | |
1049 | struct snd_interval range; | |
1050 | ||
1051 | if (!count) { | |
1052 | snd_interval_none(i); | |
1053 | return -EINVAL; | |
1054 | } | |
1055 | snd_interval_any(&range_union); | |
1056 | range_union.min = UINT_MAX; | |
1057 | range_union.max = 0; | |
1058 | for (k = 0; k < count; k++) { | |
1059 | if (mask && !(mask & (1 << k))) | |
1060 | continue; | |
1061 | snd_interval_copy(&range, &ranges[k]); | |
1062 | if (snd_interval_refine(&range, i) < 0) | |
1063 | continue; | |
1064 | if (snd_interval_empty(&range)) | |
1065 | continue; | |
1066 | ||
1067 | if (range.min < range_union.min) { | |
1068 | range_union.min = range.min; | |
1069 | range_union.openmin = 1; | |
1070 | } | |
1071 | if (range.min == range_union.min && !range.openmin) | |
1072 | range_union.openmin = 0; | |
1073 | if (range.max > range_union.max) { | |
1074 | range_union.max = range.max; | |
1075 | range_union.openmax = 1; | |
1076 | } | |
1077 | if (range.max == range_union.max && !range.openmax) | |
1078 | range_union.openmax = 0; | |
1079 | } | |
1080 | return snd_interval_refine(i, &range_union); | |
1081 | } | |
1082 | EXPORT_SYMBOL(snd_interval_ranges); | |
1083 | ||
0f519b62 | 1084 | static int snd_interval_step(struct snd_interval *i, unsigned int step) |
1da177e4 LT |
1085 | { |
1086 | unsigned int n; | |
1087 | int changed = 0; | |
0f519b62 | 1088 | n = i->min % step; |
1da177e4 LT |
1089 | if (n != 0 || i->openmin) { |
1090 | i->min += step - n; | |
df1e4719 | 1091 | i->openmin = 0; |
1da177e4 LT |
1092 | changed = 1; |
1093 | } | |
0f519b62 | 1094 | n = i->max % step; |
1da177e4 LT |
1095 | if (n != 0 || i->openmax) { |
1096 | i->max -= n; | |
df1e4719 | 1097 | i->openmax = 0; |
1da177e4 LT |
1098 | changed = 1; |
1099 | } | |
1100 | if (snd_interval_checkempty(i)) { | |
1101 | i->empty = 1; | |
1102 | return -EINVAL; | |
1103 | } | |
1104 | return changed; | |
1105 | } | |
1106 | ||
1107 | /* Info constraints helpers */ | |
1108 | ||
1109 | /** | |
1110 | * snd_pcm_hw_rule_add - add the hw-constraint rule | |
1111 | * @runtime: the pcm runtime instance | |
1112 | * @cond: condition bits | |
1113 | * @var: the variable to evaluate | |
1114 | * @func: the evaluation function | |
1115 | * @private: the private data pointer passed to function | |
1116 | * @dep: the dependent variables | |
1117 | * | |
eb7c06e8 | 1118 | * Return: Zero if successful, or a negative error code on failure. |
1da177e4 | 1119 | */ |
877211f5 | 1120 | int snd_pcm_hw_rule_add(struct snd_pcm_runtime *runtime, unsigned int cond, |
1da177e4 LT |
1121 | int var, |
1122 | snd_pcm_hw_rule_func_t func, void *private, | |
1123 | int dep, ...) | |
1124 | { | |
877211f5 TI |
1125 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; |
1126 | struct snd_pcm_hw_rule *c; | |
1da177e4 LT |
1127 | unsigned int k; |
1128 | va_list args; | |
1129 | va_start(args, dep); | |
1130 | if (constrs->rules_num >= constrs->rules_all) { | |
877211f5 | 1131 | struct snd_pcm_hw_rule *new; |
1da177e4 LT |
1132 | unsigned int new_rules = constrs->rules_all + 16; |
1133 | new = kcalloc(new_rules, sizeof(*c), GFP_KERNEL); | |
87a1c8aa JJ |
1134 | if (!new) { |
1135 | va_end(args); | |
1da177e4 | 1136 | return -ENOMEM; |
87a1c8aa | 1137 | } |
1da177e4 LT |
1138 | if (constrs->rules) { |
1139 | memcpy(new, constrs->rules, | |
1140 | constrs->rules_num * sizeof(*c)); | |
1141 | kfree(constrs->rules); | |
1142 | } | |
1143 | constrs->rules = new; | |
1144 | constrs->rules_all = new_rules; | |
1145 | } | |
1146 | c = &constrs->rules[constrs->rules_num]; | |
1147 | c->cond = cond; | |
1148 | c->func = func; | |
1149 | c->var = var; | |
1150 | c->private = private; | |
1151 | k = 0; | |
1152 | while (1) { | |
87a1c8aa JJ |
1153 | if (snd_BUG_ON(k >= ARRAY_SIZE(c->deps))) { |
1154 | va_end(args); | |
7eaa943c | 1155 | return -EINVAL; |
87a1c8aa | 1156 | } |
1da177e4 LT |
1157 | c->deps[k++] = dep; |
1158 | if (dep < 0) | |
1159 | break; | |
1160 | dep = va_arg(args, int); | |
1161 | } | |
1162 | constrs->rules_num++; | |
1163 | va_end(args); | |
1164 | return 0; | |
87a1c8aa | 1165 | } |
e88e8ae6 TI |
1166 | EXPORT_SYMBOL(snd_pcm_hw_rule_add); |
1167 | ||
1da177e4 | 1168 | /** |
1c85cc64 | 1169 | * snd_pcm_hw_constraint_mask - apply the given bitmap mask constraint |
df8db936 TI |
1170 | * @runtime: PCM runtime instance |
1171 | * @var: hw_params variable to apply the mask | |
1172 | * @mask: the bitmap mask | |
1173 | * | |
1c85cc64 | 1174 | * Apply the constraint of the given bitmap mask to a 32-bit mask parameter. |
eb7c06e8 YB |
1175 | * |
1176 | * Return: Zero if successful, or a negative error code on failure. | |
1da177e4 | 1177 | */ |
877211f5 | 1178 | int snd_pcm_hw_constraint_mask(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, |
1da177e4 LT |
1179 | u_int32_t mask) |
1180 | { | |
877211f5 TI |
1181 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; |
1182 | struct snd_mask *maskp = constrs_mask(constrs, var); | |
1da177e4 LT |
1183 | *maskp->bits &= mask; |
1184 | memset(maskp->bits + 1, 0, (SNDRV_MASK_MAX-32) / 8); /* clear rest */ | |
1185 | if (*maskp->bits == 0) | |
1186 | return -EINVAL; | |
1187 | return 0; | |
1188 | } | |
1189 | ||
1190 | /** | |
1c85cc64 | 1191 | * snd_pcm_hw_constraint_mask64 - apply the given bitmap mask constraint |
df8db936 TI |
1192 | * @runtime: PCM runtime instance |
1193 | * @var: hw_params variable to apply the mask | |
1194 | * @mask: the 64bit bitmap mask | |
1195 | * | |
1c85cc64 | 1196 | * Apply the constraint of the given bitmap mask to a 64-bit mask parameter. |
eb7c06e8 YB |
1197 | * |
1198 | * Return: Zero if successful, or a negative error code on failure. | |
1da177e4 | 1199 | */ |
877211f5 | 1200 | int snd_pcm_hw_constraint_mask64(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, |
1da177e4 LT |
1201 | u_int64_t mask) |
1202 | { | |
877211f5 TI |
1203 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; |
1204 | struct snd_mask *maskp = constrs_mask(constrs, var); | |
1da177e4 LT |
1205 | maskp->bits[0] &= (u_int32_t)mask; |
1206 | maskp->bits[1] &= (u_int32_t)(mask >> 32); | |
1207 | memset(maskp->bits + 2, 0, (SNDRV_MASK_MAX-64) / 8); /* clear rest */ | |
1208 | if (! maskp->bits[0] && ! maskp->bits[1]) | |
1209 | return -EINVAL; | |
1210 | return 0; | |
1211 | } | |
63a5d4c6 | 1212 | EXPORT_SYMBOL(snd_pcm_hw_constraint_mask64); |
1da177e4 LT |
1213 | |
1214 | /** | |
1c85cc64 | 1215 | * snd_pcm_hw_constraint_integer - apply an integer constraint to an interval |
df8db936 TI |
1216 | * @runtime: PCM runtime instance |
1217 | * @var: hw_params variable to apply the integer constraint | |
1218 | * | |
1219 | * Apply the constraint of integer to an interval parameter. | |
eb7c06e8 YB |
1220 | * |
1221 | * Return: Positive if the value is changed, zero if it's not changed, or a | |
1222 | * negative error code. | |
1da177e4 | 1223 | */ |
877211f5 | 1224 | int snd_pcm_hw_constraint_integer(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var) |
1da177e4 | 1225 | { |
877211f5 | 1226 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; |
1da177e4 LT |
1227 | return snd_interval_setinteger(constrs_interval(constrs, var)); |
1228 | } | |
e88e8ae6 TI |
1229 | EXPORT_SYMBOL(snd_pcm_hw_constraint_integer); |
1230 | ||
1da177e4 | 1231 | /** |
1c85cc64 | 1232 | * snd_pcm_hw_constraint_minmax - apply a min/max range constraint to an interval |
df8db936 TI |
1233 | * @runtime: PCM runtime instance |
1234 | * @var: hw_params variable to apply the range | |
1235 | * @min: the minimal value | |
1236 | * @max: the maximal value | |
1237 | * | |
1238 | * Apply the min/max range constraint to an interval parameter. | |
eb7c06e8 YB |
1239 | * |
1240 | * Return: Positive if the value is changed, zero if it's not changed, or a | |
1241 | * negative error code. | |
1da177e4 | 1242 | */ |
877211f5 | 1243 | int snd_pcm_hw_constraint_minmax(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, |
1da177e4 LT |
1244 | unsigned int min, unsigned int max) |
1245 | { | |
877211f5 TI |
1246 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; |
1247 | struct snd_interval t; | |
1da177e4 LT |
1248 | t.min = min; |
1249 | t.max = max; | |
1250 | t.openmin = t.openmax = 0; | |
1251 | t.integer = 0; | |
1252 | return snd_interval_refine(constrs_interval(constrs, var), &t); | |
1253 | } | |
e88e8ae6 TI |
1254 | EXPORT_SYMBOL(snd_pcm_hw_constraint_minmax); |
1255 | ||
877211f5 TI |
1256 | static int snd_pcm_hw_rule_list(struct snd_pcm_hw_params *params, |
1257 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 1258 | { |
877211f5 | 1259 | struct snd_pcm_hw_constraint_list *list = rule->private; |
1da177e4 LT |
1260 | return snd_interval_list(hw_param_interval(params, rule->var), list->count, list->list, list->mask); |
1261 | } | |
1262 | ||
1263 | ||
1264 | /** | |
1c85cc64 | 1265 | * snd_pcm_hw_constraint_list - apply a list of constraints to a parameter |
df8db936 TI |
1266 | * @runtime: PCM runtime instance |
1267 | * @cond: condition bits | |
1268 | * @var: hw_params variable to apply the list constraint | |
1269 | * @l: list | |
1270 | * | |
1271 | * Apply the list of constraints to an interval parameter. | |
eb7c06e8 YB |
1272 | * |
1273 | * Return: Zero if successful, or a negative error code on failure. | |
1da177e4 | 1274 | */ |
877211f5 | 1275 | int snd_pcm_hw_constraint_list(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1276 | unsigned int cond, |
1277 | snd_pcm_hw_param_t var, | |
1464189f | 1278 | const struct snd_pcm_hw_constraint_list *l) |
1da177e4 LT |
1279 | { |
1280 | return snd_pcm_hw_rule_add(runtime, cond, var, | |
1464189f | 1281 | snd_pcm_hw_rule_list, (void *)l, |
1da177e4 LT |
1282 | var, -1); |
1283 | } | |
e88e8ae6 TI |
1284 | EXPORT_SYMBOL(snd_pcm_hw_constraint_list); |
1285 | ||
f66f898e PR |
1286 | static int snd_pcm_hw_rule_ranges(struct snd_pcm_hw_params *params, |
1287 | struct snd_pcm_hw_rule *rule) | |
1288 | { | |
1289 | struct snd_pcm_hw_constraint_ranges *r = rule->private; | |
1290 | return snd_interval_ranges(hw_param_interval(params, rule->var), | |
1291 | r->count, r->ranges, r->mask); | |
1292 | } | |
1293 | ||
1294 | ||
1295 | /** | |
1296 | * snd_pcm_hw_constraint_ranges - apply list of range constraints to a parameter | |
1297 | * @runtime: PCM runtime instance | |
1298 | * @cond: condition bits | |
1299 | * @var: hw_params variable to apply the list of range constraints | |
1300 | * @r: ranges | |
1301 | * | |
1302 | * Apply the list of range constraints to an interval parameter. | |
1303 | * | |
1304 | * Return: Zero if successful, or a negative error code on failure. | |
1305 | */ | |
1306 | int snd_pcm_hw_constraint_ranges(struct snd_pcm_runtime *runtime, | |
1307 | unsigned int cond, | |
1308 | snd_pcm_hw_param_t var, | |
1309 | const struct snd_pcm_hw_constraint_ranges *r) | |
1310 | { | |
1311 | return snd_pcm_hw_rule_add(runtime, cond, var, | |
1312 | snd_pcm_hw_rule_ranges, (void *)r, | |
1313 | var, -1); | |
1314 | } | |
1315 | EXPORT_SYMBOL(snd_pcm_hw_constraint_ranges); | |
1316 | ||
877211f5 TI |
1317 | static int snd_pcm_hw_rule_ratnums(struct snd_pcm_hw_params *params, |
1318 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 1319 | { |
e5e113cf | 1320 | const struct snd_pcm_hw_constraint_ratnums *r = rule->private; |
1da177e4 LT |
1321 | unsigned int num = 0, den = 0; |
1322 | int err; | |
1323 | err = snd_interval_ratnum(hw_param_interval(params, rule->var), | |
1324 | r->nrats, r->rats, &num, &den); | |
1325 | if (err >= 0 && den && rule->var == SNDRV_PCM_HW_PARAM_RATE) { | |
1326 | params->rate_num = num; | |
1327 | params->rate_den = den; | |
1328 | } | |
1329 | return err; | |
1330 | } | |
1331 | ||
1332 | /** | |
1c85cc64 | 1333 | * snd_pcm_hw_constraint_ratnums - apply ratnums constraint to a parameter |
df8db936 TI |
1334 | * @runtime: PCM runtime instance |
1335 | * @cond: condition bits | |
1336 | * @var: hw_params variable to apply the ratnums constraint | |
877211f5 | 1337 | * @r: struct snd_ratnums constriants |
eb7c06e8 YB |
1338 | * |
1339 | * Return: Zero if successful, or a negative error code on failure. | |
1da177e4 | 1340 | */ |
877211f5 | 1341 | int snd_pcm_hw_constraint_ratnums(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1342 | unsigned int cond, |
1343 | snd_pcm_hw_param_t var, | |
e5e113cf | 1344 | const struct snd_pcm_hw_constraint_ratnums *r) |
1da177e4 LT |
1345 | { |
1346 | return snd_pcm_hw_rule_add(runtime, cond, var, | |
e5e113cf | 1347 | snd_pcm_hw_rule_ratnums, (void *)r, |
1da177e4 LT |
1348 | var, -1); |
1349 | } | |
e88e8ae6 TI |
1350 | EXPORT_SYMBOL(snd_pcm_hw_constraint_ratnums); |
1351 | ||
877211f5 TI |
1352 | static int snd_pcm_hw_rule_ratdens(struct snd_pcm_hw_params *params, |
1353 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 1354 | { |
e5e113cf | 1355 | const struct snd_pcm_hw_constraint_ratdens *r = rule->private; |
1da177e4 LT |
1356 | unsigned int num = 0, den = 0; |
1357 | int err = snd_interval_ratden(hw_param_interval(params, rule->var), | |
1358 | r->nrats, r->rats, &num, &den); | |
1359 | if (err >= 0 && den && rule->var == SNDRV_PCM_HW_PARAM_RATE) { | |
1360 | params->rate_num = num; | |
1361 | params->rate_den = den; | |
1362 | } | |
1363 | return err; | |
1364 | } | |
1365 | ||
1366 | /** | |
1c85cc64 | 1367 | * snd_pcm_hw_constraint_ratdens - apply ratdens constraint to a parameter |
df8db936 TI |
1368 | * @runtime: PCM runtime instance |
1369 | * @cond: condition bits | |
1370 | * @var: hw_params variable to apply the ratdens constraint | |
877211f5 | 1371 | * @r: struct snd_ratdens constriants |
eb7c06e8 YB |
1372 | * |
1373 | * Return: Zero if successful, or a negative error code on failure. | |
1da177e4 | 1374 | */ |
877211f5 | 1375 | int snd_pcm_hw_constraint_ratdens(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1376 | unsigned int cond, |
1377 | snd_pcm_hw_param_t var, | |
e5e113cf | 1378 | const struct snd_pcm_hw_constraint_ratdens *r) |
1da177e4 LT |
1379 | { |
1380 | return snd_pcm_hw_rule_add(runtime, cond, var, | |
e5e113cf | 1381 | snd_pcm_hw_rule_ratdens, (void *)r, |
1da177e4 LT |
1382 | var, -1); |
1383 | } | |
e88e8ae6 TI |
1384 | EXPORT_SYMBOL(snd_pcm_hw_constraint_ratdens); |
1385 | ||
877211f5 TI |
1386 | static int snd_pcm_hw_rule_msbits(struct snd_pcm_hw_params *params, |
1387 | struct snd_pcm_hw_rule *rule) | |
1da177e4 LT |
1388 | { |
1389 | unsigned int l = (unsigned long) rule->private; | |
1390 | int width = l & 0xffff; | |
1391 | unsigned int msbits = l >> 16; | |
b55f9fdc TS |
1392 | const struct snd_interval *i = |
1393 | hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS); | |
8ef9df55 LPC |
1394 | |
1395 | if (!snd_interval_single(i)) | |
1396 | return 0; | |
1397 | ||
1398 | if ((snd_interval_value(i) == width) || | |
1399 | (width == 0 && snd_interval_value(i) > msbits)) | |
19f52fae | 1400 | params->msbits = min_not_zero(params->msbits, msbits); |
8ef9df55 | 1401 | |
1da177e4 LT |
1402 | return 0; |
1403 | } | |
1404 | ||
1405 | /** | |
1c85cc64 | 1406 | * snd_pcm_hw_constraint_msbits - add a hw constraint msbits rule |
df8db936 TI |
1407 | * @runtime: PCM runtime instance |
1408 | * @cond: condition bits | |
1409 | * @width: sample bits width | |
1410 | * @msbits: msbits width | |
eb7c06e8 | 1411 | * |
8ef9df55 LPC |
1412 | * This constraint will set the number of most significant bits (msbits) if a |
1413 | * sample format with the specified width has been select. If width is set to 0 | |
1414 | * the msbits will be set for any sample format with a width larger than the | |
1415 | * specified msbits. | |
1416 | * | |
eb7c06e8 | 1417 | * Return: Zero if successful, or a negative error code on failure. |
1da177e4 | 1418 | */ |
877211f5 | 1419 | int snd_pcm_hw_constraint_msbits(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1420 | unsigned int cond, |
1421 | unsigned int width, | |
1422 | unsigned int msbits) | |
1423 | { | |
1424 | unsigned long l = (msbits << 16) | width; | |
1425 | return snd_pcm_hw_rule_add(runtime, cond, -1, | |
1426 | snd_pcm_hw_rule_msbits, | |
1427 | (void*) l, | |
1428 | SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); | |
1429 | } | |
e88e8ae6 TI |
1430 | EXPORT_SYMBOL(snd_pcm_hw_constraint_msbits); |
1431 | ||
877211f5 TI |
1432 | static int snd_pcm_hw_rule_step(struct snd_pcm_hw_params *params, |
1433 | struct snd_pcm_hw_rule *rule) | |
1da177e4 LT |
1434 | { |
1435 | unsigned long step = (unsigned long) rule->private; | |
0f519b62 | 1436 | return snd_interval_step(hw_param_interval(params, rule->var), step); |
1da177e4 LT |
1437 | } |
1438 | ||
1439 | /** | |
1c85cc64 | 1440 | * snd_pcm_hw_constraint_step - add a hw constraint step rule |
df8db936 TI |
1441 | * @runtime: PCM runtime instance |
1442 | * @cond: condition bits | |
1443 | * @var: hw_params variable to apply the step constraint | |
1444 | * @step: step size | |
eb7c06e8 YB |
1445 | * |
1446 | * Return: Zero if successful, or a negative error code on failure. | |
1da177e4 | 1447 | */ |
877211f5 | 1448 | int snd_pcm_hw_constraint_step(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1449 | unsigned int cond, |
1450 | snd_pcm_hw_param_t var, | |
1451 | unsigned long step) | |
1452 | { | |
1453 | return snd_pcm_hw_rule_add(runtime, cond, var, | |
1454 | snd_pcm_hw_rule_step, (void *) step, | |
1455 | var, -1); | |
1456 | } | |
e88e8ae6 TI |
1457 | EXPORT_SYMBOL(snd_pcm_hw_constraint_step); |
1458 | ||
877211f5 | 1459 | static int snd_pcm_hw_rule_pow2(struct snd_pcm_hw_params *params, struct snd_pcm_hw_rule *rule) |
1da177e4 | 1460 | { |
67c39317 | 1461 | static unsigned int pow2_sizes[] = { |
1da177e4 LT |
1462 | 1<<0, 1<<1, 1<<2, 1<<3, 1<<4, 1<<5, 1<<6, 1<<7, |
1463 | 1<<8, 1<<9, 1<<10, 1<<11, 1<<12, 1<<13, 1<<14, 1<<15, | |
1464 | 1<<16, 1<<17, 1<<18, 1<<19, 1<<20, 1<<21, 1<<22, 1<<23, | |
1465 | 1<<24, 1<<25, 1<<26, 1<<27, 1<<28, 1<<29, 1<<30 | |
1466 | }; | |
1467 | return snd_interval_list(hw_param_interval(params, rule->var), | |
1468 | ARRAY_SIZE(pow2_sizes), pow2_sizes, 0); | |
1469 | } | |
1470 | ||
1471 | /** | |
1c85cc64 | 1472 | * snd_pcm_hw_constraint_pow2 - add a hw constraint power-of-2 rule |
df8db936 TI |
1473 | * @runtime: PCM runtime instance |
1474 | * @cond: condition bits | |
1475 | * @var: hw_params variable to apply the power-of-2 constraint | |
eb7c06e8 YB |
1476 | * |
1477 | * Return: Zero if successful, or a negative error code on failure. | |
1da177e4 | 1478 | */ |
877211f5 | 1479 | int snd_pcm_hw_constraint_pow2(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1480 | unsigned int cond, |
1481 | snd_pcm_hw_param_t var) | |
1482 | { | |
1483 | return snd_pcm_hw_rule_add(runtime, cond, var, | |
1484 | snd_pcm_hw_rule_pow2, NULL, | |
1485 | var, -1); | |
1486 | } | |
e88e8ae6 TI |
1487 | EXPORT_SYMBOL(snd_pcm_hw_constraint_pow2); |
1488 | ||
d5b702a6 CL |
1489 | static int snd_pcm_hw_rule_noresample_func(struct snd_pcm_hw_params *params, |
1490 | struct snd_pcm_hw_rule *rule) | |
1491 | { | |
1492 | unsigned int base_rate = (unsigned int)(uintptr_t)rule->private; | |
1493 | struct snd_interval *rate; | |
1494 | ||
1495 | rate = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE); | |
1496 | return snd_interval_list(rate, 1, &base_rate, 0); | |
1497 | } | |
1498 | ||
1499 | /** | |
1500 | * snd_pcm_hw_rule_noresample - add a rule to allow disabling hw resampling | |
1501 | * @runtime: PCM runtime instance | |
1502 | * @base_rate: the rate at which the hardware does not resample | |
eb7c06e8 YB |
1503 | * |
1504 | * Return: Zero if successful, or a negative error code on failure. | |
d5b702a6 CL |
1505 | */ |
1506 | int snd_pcm_hw_rule_noresample(struct snd_pcm_runtime *runtime, | |
1507 | unsigned int base_rate) | |
1508 | { | |
1509 | return snd_pcm_hw_rule_add(runtime, SNDRV_PCM_HW_PARAMS_NORESAMPLE, | |
1510 | SNDRV_PCM_HW_PARAM_RATE, | |
1511 | snd_pcm_hw_rule_noresample_func, | |
1512 | (void *)(uintptr_t)base_rate, | |
1513 | SNDRV_PCM_HW_PARAM_RATE, -1); | |
1514 | } | |
1515 | EXPORT_SYMBOL(snd_pcm_hw_rule_noresample); | |
1516 | ||
877211f5 | 1517 | static void _snd_pcm_hw_param_any(struct snd_pcm_hw_params *params, |
123992f7 | 1518 | snd_pcm_hw_param_t var) |
1da177e4 LT |
1519 | { |
1520 | if (hw_is_mask(var)) { | |
1521 | snd_mask_any(hw_param_mask(params, var)); | |
1522 | params->cmask |= 1 << var; | |
1523 | params->rmask |= 1 << var; | |
1524 | return; | |
1525 | } | |
1526 | if (hw_is_interval(var)) { | |
1527 | snd_interval_any(hw_param_interval(params, var)); | |
1528 | params->cmask |= 1 << var; | |
1529 | params->rmask |= 1 << var; | |
1530 | return; | |
1531 | } | |
1532 | snd_BUG(); | |
1533 | } | |
1534 | ||
877211f5 | 1535 | void _snd_pcm_hw_params_any(struct snd_pcm_hw_params *params) |
1da177e4 LT |
1536 | { |
1537 | unsigned int k; | |
1538 | memset(params, 0, sizeof(*params)); | |
1539 | for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) | |
1540 | _snd_pcm_hw_param_any(params, k); | |
1541 | for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) | |
1542 | _snd_pcm_hw_param_any(params, k); | |
1543 | params->info = ~0U; | |
1544 | } | |
e88e8ae6 | 1545 | EXPORT_SYMBOL(_snd_pcm_hw_params_any); |
1da177e4 LT |
1546 | |
1547 | /** | |
1c85cc64 | 1548 | * snd_pcm_hw_param_value - return @params field @var value |
df8db936 TI |
1549 | * @params: the hw_params instance |
1550 | * @var: parameter to retrieve | |
1c85cc64 | 1551 | * @dir: pointer to the direction (-1,0,1) or %NULL |
1da177e4 | 1552 | * |
eb7c06e8 YB |
1553 | * Return: The value for field @var if it's fixed in configuration space |
1554 | * defined by @params. -%EINVAL otherwise. | |
1da177e4 | 1555 | */ |
e88e8ae6 TI |
1556 | int snd_pcm_hw_param_value(const struct snd_pcm_hw_params *params, |
1557 | snd_pcm_hw_param_t var, int *dir) | |
1da177e4 LT |
1558 | { |
1559 | if (hw_is_mask(var)) { | |
877211f5 | 1560 | const struct snd_mask *mask = hw_param_mask_c(params, var); |
1da177e4 LT |
1561 | if (!snd_mask_single(mask)) |
1562 | return -EINVAL; | |
1563 | if (dir) | |
1564 | *dir = 0; | |
1565 | return snd_mask_value(mask); | |
1566 | } | |
1567 | if (hw_is_interval(var)) { | |
877211f5 | 1568 | const struct snd_interval *i = hw_param_interval_c(params, var); |
1da177e4 LT |
1569 | if (!snd_interval_single(i)) |
1570 | return -EINVAL; | |
1571 | if (dir) | |
1572 | *dir = i->openmin; | |
1573 | return snd_interval_value(i); | |
1574 | } | |
1da177e4 LT |
1575 | return -EINVAL; |
1576 | } | |
e88e8ae6 | 1577 | EXPORT_SYMBOL(snd_pcm_hw_param_value); |
1da177e4 | 1578 | |
877211f5 | 1579 | void _snd_pcm_hw_param_setempty(struct snd_pcm_hw_params *params, |
1da177e4 LT |
1580 | snd_pcm_hw_param_t var) |
1581 | { | |
1582 | if (hw_is_mask(var)) { | |
1583 | snd_mask_none(hw_param_mask(params, var)); | |
1584 | params->cmask |= 1 << var; | |
1585 | params->rmask |= 1 << var; | |
1586 | } else if (hw_is_interval(var)) { | |
1587 | snd_interval_none(hw_param_interval(params, var)); | |
1588 | params->cmask |= 1 << var; | |
1589 | params->rmask |= 1 << var; | |
1590 | } else { | |
1591 | snd_BUG(); | |
1592 | } | |
1593 | } | |
e88e8ae6 | 1594 | EXPORT_SYMBOL(_snd_pcm_hw_param_setempty); |
1da177e4 | 1595 | |
877211f5 | 1596 | static int _snd_pcm_hw_param_first(struct snd_pcm_hw_params *params, |
123992f7 | 1597 | snd_pcm_hw_param_t var) |
1da177e4 LT |
1598 | { |
1599 | int changed; | |
1600 | if (hw_is_mask(var)) | |
1601 | changed = snd_mask_refine_first(hw_param_mask(params, var)); | |
1602 | else if (hw_is_interval(var)) | |
1603 | changed = snd_interval_refine_first(hw_param_interval(params, var)); | |
2f4ca8e5 | 1604 | else |
1da177e4 | 1605 | return -EINVAL; |
1da177e4 LT |
1606 | if (changed) { |
1607 | params->cmask |= 1 << var; | |
1608 | params->rmask |= 1 << var; | |
1609 | } | |
1610 | return changed; | |
1611 | } | |
1612 | ||
1613 | ||
1614 | /** | |
1c85cc64 | 1615 | * snd_pcm_hw_param_first - refine config space and return minimum value |
df8db936 TI |
1616 | * @pcm: PCM instance |
1617 | * @params: the hw_params instance | |
1618 | * @var: parameter to retrieve | |
1c85cc64 | 1619 | * @dir: pointer to the direction (-1,0,1) or %NULL |
1da177e4 | 1620 | * |
1c85cc64 | 1621 | * Inside configuration space defined by @params remove from @var all |
1da177e4 | 1622 | * values > minimum. Reduce configuration space accordingly. |
eb7c06e8 YB |
1623 | * |
1624 | * Return: The minimum, or a negative error code on failure. | |
1da177e4 | 1625 | */ |
e88e8ae6 TI |
1626 | int snd_pcm_hw_param_first(struct snd_pcm_substream *pcm, |
1627 | struct snd_pcm_hw_params *params, | |
1628 | snd_pcm_hw_param_t var, int *dir) | |
1da177e4 LT |
1629 | { |
1630 | int changed = _snd_pcm_hw_param_first(params, var); | |
1631 | if (changed < 0) | |
1632 | return changed; | |
1633 | if (params->rmask) { | |
1634 | int err = snd_pcm_hw_refine(pcm, params); | |
7eaa943c TI |
1635 | if (snd_BUG_ON(err < 0)) |
1636 | return err; | |
1da177e4 LT |
1637 | } |
1638 | return snd_pcm_hw_param_value(params, var, dir); | |
1639 | } | |
e88e8ae6 TI |
1640 | EXPORT_SYMBOL(snd_pcm_hw_param_first); |
1641 | ||
877211f5 | 1642 | static int _snd_pcm_hw_param_last(struct snd_pcm_hw_params *params, |
123992f7 | 1643 | snd_pcm_hw_param_t var) |
1da177e4 LT |
1644 | { |
1645 | int changed; | |
1646 | if (hw_is_mask(var)) | |
1647 | changed = snd_mask_refine_last(hw_param_mask(params, var)); | |
1648 | else if (hw_is_interval(var)) | |
1649 | changed = snd_interval_refine_last(hw_param_interval(params, var)); | |
2f4ca8e5 | 1650 | else |
1da177e4 | 1651 | return -EINVAL; |
1da177e4 LT |
1652 | if (changed) { |
1653 | params->cmask |= 1 << var; | |
1654 | params->rmask |= 1 << var; | |
1655 | } | |
1656 | return changed; | |
1657 | } | |
1658 | ||
1659 | ||
1660 | /** | |
1c85cc64 | 1661 | * snd_pcm_hw_param_last - refine config space and return maximum value |
df8db936 TI |
1662 | * @pcm: PCM instance |
1663 | * @params: the hw_params instance | |
1664 | * @var: parameter to retrieve | |
1c85cc64 | 1665 | * @dir: pointer to the direction (-1,0,1) or %NULL |
1da177e4 | 1666 | * |
1c85cc64 | 1667 | * Inside configuration space defined by @params remove from @var all |
1da177e4 | 1668 | * values < maximum. Reduce configuration space accordingly. |
eb7c06e8 YB |
1669 | * |
1670 | * Return: The maximum, or a negative error code on failure. | |
1da177e4 | 1671 | */ |
e88e8ae6 TI |
1672 | int snd_pcm_hw_param_last(struct snd_pcm_substream *pcm, |
1673 | struct snd_pcm_hw_params *params, | |
1674 | snd_pcm_hw_param_t var, int *dir) | |
1da177e4 LT |
1675 | { |
1676 | int changed = _snd_pcm_hw_param_last(params, var); | |
1677 | if (changed < 0) | |
1678 | return changed; | |
1679 | if (params->rmask) { | |
1680 | int err = snd_pcm_hw_refine(pcm, params); | |
7eaa943c TI |
1681 | if (snd_BUG_ON(err < 0)) |
1682 | return err; | |
1da177e4 LT |
1683 | } |
1684 | return snd_pcm_hw_param_value(params, var, dir); | |
1685 | } | |
e88e8ae6 | 1686 | EXPORT_SYMBOL(snd_pcm_hw_param_last); |
1da177e4 | 1687 | |
877211f5 | 1688 | static int snd_pcm_lib_ioctl_reset(struct snd_pcm_substream *substream, |
1da177e4 LT |
1689 | void *arg) |
1690 | { | |
877211f5 | 1691 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1692 | unsigned long flags; |
1693 | snd_pcm_stream_lock_irqsave(substream, flags); | |
1694 | if (snd_pcm_running(substream) && | |
1695 | snd_pcm_update_hw_ptr(substream) >= 0) | |
1696 | runtime->status->hw_ptr %= runtime->buffer_size; | |
0e8014d7 | 1697 | else { |
1da177e4 | 1698 | runtime->status->hw_ptr = 0; |
0e8014d7 PLB |
1699 | runtime->hw_ptr_wrap = 0; |
1700 | } | |
1da177e4 LT |
1701 | snd_pcm_stream_unlock_irqrestore(substream, flags); |
1702 | return 0; | |
1703 | } | |
1704 | ||
877211f5 | 1705 | static int snd_pcm_lib_ioctl_channel_info(struct snd_pcm_substream *substream, |
1da177e4 LT |
1706 | void *arg) |
1707 | { | |
877211f5 TI |
1708 | struct snd_pcm_channel_info *info = arg; |
1709 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1da177e4 LT |
1710 | int width; |
1711 | if (!(runtime->info & SNDRV_PCM_INFO_MMAP)) { | |
1712 | info->offset = -1; | |
1713 | return 0; | |
1714 | } | |
1715 | width = snd_pcm_format_physical_width(runtime->format); | |
1716 | if (width < 0) | |
1717 | return width; | |
1718 | info->offset = 0; | |
1719 | switch (runtime->access) { | |
1720 | case SNDRV_PCM_ACCESS_MMAP_INTERLEAVED: | |
1721 | case SNDRV_PCM_ACCESS_RW_INTERLEAVED: | |
1722 | info->first = info->channel * width; | |
1723 | info->step = runtime->channels * width; | |
1724 | break; | |
1725 | case SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED: | |
1726 | case SNDRV_PCM_ACCESS_RW_NONINTERLEAVED: | |
1727 | { | |
1728 | size_t size = runtime->dma_bytes / runtime->channels; | |
1729 | info->first = info->channel * size * 8; | |
1730 | info->step = width; | |
1731 | break; | |
1732 | } | |
1733 | default: | |
1734 | snd_BUG(); | |
1735 | break; | |
1736 | } | |
1737 | return 0; | |
1738 | } | |
1739 | ||
8bea869c JK |
1740 | static int snd_pcm_lib_ioctl_fifo_size(struct snd_pcm_substream *substream, |
1741 | void *arg) | |
1742 | { | |
1743 | struct snd_pcm_hw_params *params = arg; | |
1744 | snd_pcm_format_t format; | |
a9960e6a CL |
1745 | int channels; |
1746 | ssize_t frame_size; | |
8bea869c JK |
1747 | |
1748 | params->fifo_size = substream->runtime->hw.fifo_size; | |
1749 | if (!(substream->runtime->hw.info & SNDRV_PCM_INFO_FIFO_IN_FRAMES)) { | |
1750 | format = params_format(params); | |
1751 | channels = params_channels(params); | |
a9960e6a CL |
1752 | frame_size = snd_pcm_format_size(format, channels); |
1753 | if (frame_size > 0) | |
1754 | params->fifo_size /= (unsigned)frame_size; | |
8bea869c JK |
1755 | } |
1756 | return 0; | |
1757 | } | |
1758 | ||
1da177e4 LT |
1759 | /** |
1760 | * snd_pcm_lib_ioctl - a generic PCM ioctl callback | |
1761 | * @substream: the pcm substream instance | |
1762 | * @cmd: ioctl command | |
1763 | * @arg: ioctl argument | |
1764 | * | |
1765 | * Processes the generic ioctl commands for PCM. | |
1766 | * Can be passed as the ioctl callback for PCM ops. | |
1767 | * | |
eb7c06e8 | 1768 | * Return: Zero if successful, or a negative error code on failure. |
1da177e4 | 1769 | */ |
877211f5 | 1770 | int snd_pcm_lib_ioctl(struct snd_pcm_substream *substream, |
1da177e4 LT |
1771 | unsigned int cmd, void *arg) |
1772 | { | |
1773 | switch (cmd) { | |
1da177e4 LT |
1774 | case SNDRV_PCM_IOCTL1_RESET: |
1775 | return snd_pcm_lib_ioctl_reset(substream, arg); | |
1776 | case SNDRV_PCM_IOCTL1_CHANNEL_INFO: | |
1777 | return snd_pcm_lib_ioctl_channel_info(substream, arg); | |
8bea869c JK |
1778 | case SNDRV_PCM_IOCTL1_FIFO_SIZE: |
1779 | return snd_pcm_lib_ioctl_fifo_size(substream, arg); | |
1da177e4 LT |
1780 | } |
1781 | return -ENXIO; | |
1782 | } | |
e88e8ae6 TI |
1783 | EXPORT_SYMBOL(snd_pcm_lib_ioctl); |
1784 | ||
1da177e4 LT |
1785 | /** |
1786 | * snd_pcm_period_elapsed - update the pcm status for the next period | |
1787 | * @substream: the pcm substream instance | |
1788 | * | |
1789 | * This function is called from the interrupt handler when the | |
1790 | * PCM has processed the period size. It will update the current | |
31e8960b | 1791 | * pointer, wake up sleepers, etc. |
1da177e4 LT |
1792 | * |
1793 | * Even if more than one periods have elapsed since the last call, you | |
1794 | * have to call this only once. | |
1795 | */ | |
877211f5 | 1796 | void snd_pcm_period_elapsed(struct snd_pcm_substream *substream) |
1da177e4 | 1797 | { |
877211f5 | 1798 | struct snd_pcm_runtime *runtime; |
1da177e4 LT |
1799 | unsigned long flags; |
1800 | ||
7eaa943c TI |
1801 | if (PCM_RUNTIME_CHECK(substream)) |
1802 | return; | |
1da177e4 | 1803 | runtime = substream->runtime; |
1da177e4 | 1804 | |
1da177e4 LT |
1805 | snd_pcm_stream_lock_irqsave(substream, flags); |
1806 | if (!snd_pcm_running(substream) || | |
f240406b | 1807 | snd_pcm_update_hw_ptr0(substream, 1) < 0) |
1da177e4 LT |
1808 | goto _end; |
1809 | ||
90bbaf66 | 1810 | #ifdef CONFIG_SND_PCM_TIMER |
1da177e4 LT |
1811 | if (substream->timer_running) |
1812 | snd_timer_interrupt(substream->timer, 1); | |
90bbaf66 | 1813 | #endif |
1da177e4 | 1814 | _end: |
1da177e4 | 1815 | kill_fasync(&runtime->fasync, SIGIO, POLL_IN); |
3aa02cb6 | 1816 | snd_pcm_stream_unlock_irqrestore(substream, flags); |
1da177e4 | 1817 | } |
e88e8ae6 TI |
1818 | EXPORT_SYMBOL(snd_pcm_period_elapsed); |
1819 | ||
13075510 TI |
1820 | /* |
1821 | * Wait until avail_min data becomes available | |
1822 | * Returns a negative error code if any error occurs during operation. | |
1823 | * The available space is stored on availp. When err = 0 and avail = 0 | |
1824 | * on the capture stream, it indicates the stream is in DRAINING state. | |
1825 | */ | |
5daeba34 | 1826 | static int wait_for_avail(struct snd_pcm_substream *substream, |
13075510 TI |
1827 | snd_pcm_uframes_t *availp) |
1828 | { | |
1829 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1830 | int is_playback = substream->stream == SNDRV_PCM_STREAM_PLAYBACK; | |
ac6424b9 | 1831 | wait_queue_entry_t wait; |
13075510 TI |
1832 | int err = 0; |
1833 | snd_pcm_uframes_t avail = 0; | |
f2b3614c TI |
1834 | long wait_time, tout; |
1835 | ||
763437a9 AV |
1836 | init_waitqueue_entry(&wait, current); |
1837 | set_current_state(TASK_INTERRUPTIBLE); | |
1838 | add_wait_queue(&runtime->tsleep, &wait); | |
1839 | ||
f2b3614c TI |
1840 | if (runtime->no_period_wakeup) |
1841 | wait_time = MAX_SCHEDULE_TIMEOUT; | |
1842 | else { | |
1843 | wait_time = 10; | |
1844 | if (runtime->rate) { | |
1845 | long t = runtime->period_size * 2 / runtime->rate; | |
1846 | wait_time = max(t, wait_time); | |
1847 | } | |
1848 | wait_time = msecs_to_jiffies(wait_time * 1000); | |
1849 | } | |
763437a9 | 1850 | |
13075510 TI |
1851 | for (;;) { |
1852 | if (signal_pending(current)) { | |
1853 | err = -ERESTARTSYS; | |
1854 | break; | |
1855 | } | |
763437a9 AV |
1856 | |
1857 | /* | |
1858 | * We need to check if space became available already | |
1859 | * (and thus the wakeup happened already) first to close | |
1860 | * the race of space already having become available. | |
1861 | * This check must happen after been added to the waitqueue | |
1862 | * and having current state be INTERRUPTIBLE. | |
1863 | */ | |
1864 | if (is_playback) | |
1865 | avail = snd_pcm_playback_avail(runtime); | |
1866 | else | |
1867 | avail = snd_pcm_capture_avail(runtime); | |
1868 | if (avail >= runtime->twake) | |
1869 | break; | |
13075510 | 1870 | snd_pcm_stream_unlock_irq(substream); |
763437a9 AV |
1871 | |
1872 | tout = schedule_timeout(wait_time); | |
1873 | ||
13075510 | 1874 | snd_pcm_stream_lock_irq(substream); |
763437a9 | 1875 | set_current_state(TASK_INTERRUPTIBLE); |
13075510 TI |
1876 | switch (runtime->status->state) { |
1877 | case SNDRV_PCM_STATE_SUSPENDED: | |
1878 | err = -ESTRPIPE; | |
1879 | goto _endloop; | |
1880 | case SNDRV_PCM_STATE_XRUN: | |
1881 | err = -EPIPE; | |
1882 | goto _endloop; | |
1883 | case SNDRV_PCM_STATE_DRAINING: | |
1884 | if (is_playback) | |
1885 | err = -EPIPE; | |
1886 | else | |
1887 | avail = 0; /* indicate draining */ | |
1888 | goto _endloop; | |
1889 | case SNDRV_PCM_STATE_OPEN: | |
1890 | case SNDRV_PCM_STATE_SETUP: | |
1891 | case SNDRV_PCM_STATE_DISCONNECTED: | |
1892 | err = -EBADFD; | |
1893 | goto _endloop; | |
ed697e1a JK |
1894 | case SNDRV_PCM_STATE_PAUSED: |
1895 | continue; | |
13075510 TI |
1896 | } |
1897 | if (!tout) { | |
09e56df8 TI |
1898 | pcm_dbg(substream->pcm, |
1899 | "%s write error (DMA or IRQ trouble?)\n", | |
1900 | is_playback ? "playback" : "capture"); | |
13075510 TI |
1901 | err = -EIO; |
1902 | break; | |
1903 | } | |
13075510 TI |
1904 | } |
1905 | _endloop: | |
763437a9 | 1906 | set_current_state(TASK_RUNNING); |
c91a988d | 1907 | remove_wait_queue(&runtime->tsleep, &wait); |
13075510 TI |
1908 | *availp = avail; |
1909 | return err; | |
1910 | } | |
1911 | ||
9f600630 TI |
1912 | typedef int (*pcm_transfer_f)(struct snd_pcm_substream *substream, |
1913 | int channel, unsigned long hwoff, | |
1914 | void *buf, unsigned long bytes); | |
bdc4acf7 | 1915 | |
9f600630 TI |
1916 | typedef int (*pcm_copy_f)(struct snd_pcm_substream *, snd_pcm_uframes_t, void *, |
1917 | snd_pcm_uframes_t, snd_pcm_uframes_t, pcm_transfer_f); | |
1918 | ||
1919 | /* calculate the target DMA-buffer position to be written/read */ | |
1920 | static void *get_dma_ptr(struct snd_pcm_runtime *runtime, | |
1921 | int channel, unsigned long hwoff) | |
1da177e4 | 1922 | { |
9f600630 TI |
1923 | return runtime->dma_area + hwoff + |
1924 | channel * (runtime->dma_bytes / runtime->channels); | |
1925 | } | |
1926 | ||
5c7264cf TI |
1927 | /* default copy_user ops for write; used for both interleaved and non- modes */ |
1928 | static int default_write_copy(struct snd_pcm_substream *substream, | |
1929 | int channel, unsigned long hwoff, | |
1930 | void *buf, unsigned long bytes) | |
9f600630 TI |
1931 | { |
1932 | if (copy_from_user(get_dma_ptr(substream->runtime, channel, hwoff), | |
5c7264cf | 1933 | (void __user *)buf, bytes)) |
9f600630 TI |
1934 | return -EFAULT; |
1935 | return 0; | |
1936 | } | |
1937 | ||
68541213 TI |
1938 | /* default copy_kernel ops for write */ |
1939 | static int default_write_copy_kernel(struct snd_pcm_substream *substream, | |
1940 | int channel, unsigned long hwoff, | |
1941 | void *buf, unsigned long bytes) | |
1942 | { | |
1943 | memcpy(get_dma_ptr(substream->runtime, channel, hwoff), buf, bytes); | |
1da177e4 LT |
1944 | return 0; |
1945 | } | |
1da177e4 | 1946 | |
9f600630 TI |
1947 | /* fill silence instead of copy data; called as a transfer helper |
1948 | * from __snd_pcm_lib_write() or directly from noninterleaved_copy() when | |
1949 | * a NULL buffer is passed | |
1950 | */ | |
1951 | static int fill_silence(struct snd_pcm_substream *substream, int channel, | |
1952 | unsigned long hwoff, void *buf, unsigned long bytes) | |
1da177e4 | 1953 | { |
877211f5 | 1954 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 | 1955 | |
9f600630 | 1956 | if (substream->stream != SNDRV_PCM_STREAM_PLAYBACK) |
1da177e4 | 1957 | return 0; |
9f600630 TI |
1958 | if (substream->ops->fill_silence) |
1959 | return substream->ops->fill_silence(substream, channel, | |
1960 | hwoff, bytes); | |
1da177e4 | 1961 | |
9f600630 TI |
1962 | snd_pcm_format_set_silence(runtime->format, |
1963 | get_dma_ptr(runtime, channel, hwoff), | |
1964 | bytes_to_samples(runtime, bytes)); | |
1da177e4 LT |
1965 | return 0; |
1966 | } | |
1da177e4 | 1967 | |
5c7264cf TI |
1968 | /* default copy_user ops for read; used for both interleaved and non- modes */ |
1969 | static int default_read_copy(struct snd_pcm_substream *substream, | |
1970 | int channel, unsigned long hwoff, | |
1971 | void *buf, unsigned long bytes) | |
1972 | { | |
1973 | if (copy_to_user((void __user *)buf, | |
1974 | get_dma_ptr(substream->runtime, channel, hwoff), | |
1975 | bytes)) | |
1976 | return -EFAULT; | |
1977 | return 0; | |
1978 | } | |
1da177e4 | 1979 | |
68541213 TI |
1980 | /* default copy_kernel ops for read */ |
1981 | static int default_read_copy_kernel(struct snd_pcm_substream *substream, | |
1982 | int channel, unsigned long hwoff, | |
1983 | void *buf, unsigned long bytes) | |
1984 | { | |
1985 | memcpy(buf, get_dma_ptr(substream->runtime, channel, hwoff), bytes); | |
1986 | return 0; | |
1987 | } | |
1988 | ||
9f600630 TI |
1989 | /* call transfer function with the converted pointers and sizes; |
1990 | * for interleaved mode, it's one shot for all samples | |
1991 | */ | |
1992 | static int interleaved_copy(struct snd_pcm_substream *substream, | |
1993 | snd_pcm_uframes_t hwoff, void *data, | |
1994 | snd_pcm_uframes_t off, | |
1995 | snd_pcm_uframes_t frames, | |
1996 | pcm_transfer_f transfer) | |
1997 | { | |
1998 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1999 | ||
2000 | /* convert to bytes */ | |
2001 | hwoff = frames_to_bytes(runtime, hwoff); | |
2002 | off = frames_to_bytes(runtime, off); | |
2003 | frames = frames_to_bytes(runtime, frames); | |
2004 | return transfer(substream, 0, hwoff, data + off, frames); | |
2005 | } | |
2006 | ||
2007 | /* call transfer function with the converted pointers and sizes for each | |
2008 | * non-interleaved channel; when buffer is NULL, silencing instead of copying | |
2009 | */ | |
2010 | static int noninterleaved_copy(struct snd_pcm_substream *substream, | |
2011 | snd_pcm_uframes_t hwoff, void *data, | |
2012 | snd_pcm_uframes_t off, | |
2013 | snd_pcm_uframes_t frames, | |
2014 | pcm_transfer_f transfer) | |
bdc4acf7 TI |
2015 | { |
2016 | struct snd_pcm_runtime *runtime = substream->runtime; | |
bdc4acf7 | 2017 | int channels = runtime->channels; |
9f600630 TI |
2018 | void **bufs = data; |
2019 | int c, err; | |
2020 | ||
2021 | /* convert to bytes; note that it's not frames_to_bytes() here. | |
2022 | * in non-interleaved mode, we copy for each channel, thus | |
2023 | * each copy is n_samples bytes x channels = whole frames. | |
2024 | */ | |
2025 | off = samples_to_bytes(runtime, off); | |
2026 | frames = samples_to_bytes(runtime, frames); | |
2027 | hwoff = samples_to_bytes(runtime, hwoff); | |
2028 | for (c = 0; c < channels; ++c, ++bufs) { | |
2029 | if (!data || !*bufs) | |
2030 | err = fill_silence(substream, c, hwoff, NULL, frames); | |
2031 | else | |
2032 | err = transfer(substream, c, hwoff, *bufs + off, | |
2033 | frames); | |
2034 | if (err < 0) | |
2035 | return err; | |
1da177e4 | 2036 | } |
bdc4acf7 TI |
2037 | return 0; |
2038 | } | |
2039 | ||
a9cd29e7 TI |
2040 | /* fill silence on the given buffer position; |
2041 | * called from snd_pcm_playback_silence() | |
2042 | */ | |
2043 | static int fill_silence_frames(struct snd_pcm_substream *substream, | |
2044 | snd_pcm_uframes_t off, snd_pcm_uframes_t frames) | |
2045 | { | |
2046 | if (substream->runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED || | |
2047 | substream->runtime->access == SNDRV_PCM_ACCESS_MMAP_INTERLEAVED) | |
2048 | return interleaved_copy(substream, off, NULL, 0, frames, | |
2049 | fill_silence); | |
2050 | else | |
2051 | return noninterleaved_copy(substream, off, NULL, 0, frames, | |
2052 | fill_silence); | |
1da177e4 LT |
2053 | } |
2054 | ||
7eaa943c TI |
2055 | /* sanity-check for read/write methods */ |
2056 | static int pcm_sanity_check(struct snd_pcm_substream *substream) | |
1da177e4 | 2057 | { |
877211f5 | 2058 | struct snd_pcm_runtime *runtime; |
7eaa943c TI |
2059 | if (PCM_RUNTIME_CHECK(substream)) |
2060 | return -ENXIO; | |
1da177e4 | 2061 | runtime = substream->runtime; |
bdc4acf7 | 2062 | if (snd_BUG_ON(!substream->ops->copy_user && !runtime->dma_area)) |
7eaa943c | 2063 | return -EINVAL; |
1da177e4 LT |
2064 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) |
2065 | return -EBADFD; | |
7eaa943c TI |
2066 | return 0; |
2067 | } | |
2068 | ||
6ba63929 | 2069 | static int pcm_accessible_state(struct snd_pcm_runtime *runtime) |
7eaa943c | 2070 | { |
6ba63929 TI |
2071 | switch (runtime->status->state) { |
2072 | case SNDRV_PCM_STATE_PREPARED: | |
2073 | case SNDRV_PCM_STATE_RUNNING: | |
2074 | case SNDRV_PCM_STATE_PAUSED: | |
2075 | return 0; | |
2076 | case SNDRV_PCM_STATE_XRUN: | |
2077 | return -EPIPE; | |
2078 | case SNDRV_PCM_STATE_SUSPENDED: | |
2079 | return -ESTRPIPE; | |
2080 | default: | |
2081 | return -EBADFD; | |
2082 | } | |
1da177e4 LT |
2083 | } |
2084 | ||
66e01a5c TS |
2085 | /* update to the given appl_ptr and call ack callback if needed; |
2086 | * when an error is returned, take back to the original value | |
2087 | */ | |
2088 | int pcm_lib_apply_appl_ptr(struct snd_pcm_substream *substream, | |
2089 | snd_pcm_uframes_t appl_ptr) | |
1da177e4 | 2090 | { |
877211f5 | 2091 | struct snd_pcm_runtime *runtime = substream->runtime; |
66e01a5c TS |
2092 | snd_pcm_uframes_t old_appl_ptr = runtime->control->appl_ptr; |
2093 | int ret; | |
2094 | ||
f8ff2f28 TI |
2095 | if (old_appl_ptr == appl_ptr) |
2096 | return 0; | |
2097 | ||
66e01a5c TS |
2098 | runtime->control->appl_ptr = appl_ptr; |
2099 | if (substream->ops->ack) { | |
2100 | ret = substream->ops->ack(substream); | |
2101 | if (ret < 0) { | |
2102 | runtime->control->appl_ptr = old_appl_ptr; | |
2103 | return ret; | |
1da177e4 LT |
2104 | } |
2105 | } | |
fccf5388 TS |
2106 | |
2107 | trace_applptr(substream, old_appl_ptr, appl_ptr); | |
2108 | ||
1da177e4 LT |
2109 | return 0; |
2110 | } | |
66e01a5c | 2111 | |
5c7264cf TI |
2112 | /* the common loop for read/write data */ |
2113 | snd_pcm_sframes_t __snd_pcm_lib_xfer(struct snd_pcm_substream *substream, | |
2114 | void *data, bool interleaved, | |
68541213 | 2115 | snd_pcm_uframes_t size, bool in_kernel) |
1da177e4 | 2116 | { |
877211f5 | 2117 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
2118 | snd_pcm_uframes_t xfer = 0; |
2119 | snd_pcm_uframes_t offset = 0; | |
0910c216 | 2120 | snd_pcm_uframes_t avail; |
9f600630 TI |
2121 | pcm_copy_f writer; |
2122 | pcm_transfer_f transfer; | |
c48f12ee | 2123 | bool nonblock; |
5c7264cf | 2124 | bool is_playback; |
7eaa943c | 2125 | int err; |
1da177e4 | 2126 | |
7eaa943c TI |
2127 | err = pcm_sanity_check(substream); |
2128 | if (err < 0) | |
2129 | return err; | |
e88e8ae6 | 2130 | |
5c7264cf | 2131 | is_playback = substream->stream == SNDRV_PCM_STREAM_PLAYBACK; |
c48f12ee TI |
2132 | if (interleaved) { |
2133 | if (runtime->access != SNDRV_PCM_ACCESS_RW_INTERLEAVED && | |
2134 | runtime->channels > 1) | |
2135 | return -EINVAL; | |
9f600630 | 2136 | writer = interleaved_copy; |
1da177e4 | 2137 | } else { |
c48f12ee TI |
2138 | if (runtime->access != SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) |
2139 | return -EINVAL; | |
9f600630 | 2140 | writer = noninterleaved_copy; |
1da177e4 | 2141 | } |
1da177e4 | 2142 | |
9f600630 | 2143 | if (!data) { |
5c7264cf TI |
2144 | if (is_playback) |
2145 | transfer = fill_silence; | |
2146 | else | |
2147 | return -EINVAL; | |
68541213 TI |
2148 | } else if (in_kernel) { |
2149 | if (substream->ops->copy_kernel) | |
2150 | transfer = substream->ops->copy_kernel; | |
2151 | else | |
2152 | transfer = is_playback ? | |
2153 | default_write_copy_kernel : default_read_copy_kernel; | |
9f600630 TI |
2154 | } else { |
2155 | if (substream->ops->copy_user) | |
2156 | transfer = (pcm_transfer_f)substream->ops->copy_user; | |
2157 | else | |
5c7264cf TI |
2158 | transfer = is_playback ? |
2159 | default_write_copy : default_read_copy; | |
c48f12ee | 2160 | } |
1da177e4 LT |
2161 | |
2162 | if (size == 0) | |
2163 | return 0; | |
1da177e4 | 2164 | |
c48f12ee TI |
2165 | nonblock = !!(substream->f_flags & O_NONBLOCK); |
2166 | ||
1da177e4 | 2167 | snd_pcm_stream_lock_irq(substream); |
6ba63929 TI |
2168 | err = pcm_accessible_state(runtime); |
2169 | if (err < 0) | |
1da177e4 | 2170 | goto _end_unlock; |
1da177e4 | 2171 | |
5c7264cf TI |
2172 | if (!is_playback && |
2173 | runtime->status->state == SNDRV_PCM_STATE_PREPARED && | |
6ba63929 TI |
2174 | size >= runtime->start_threshold) { |
2175 | err = snd_pcm_start(substream); | |
2176 | if (err < 0) | |
2177 | goto _end_unlock; | |
1da177e4 LT |
2178 | } |
2179 | ||
5daeba34 | 2180 | runtime->twake = runtime->control->avail_min ? : 1; |
0910c216 TI |
2181 | if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) |
2182 | snd_pcm_update_hw_ptr(substream); | |
5c7264cf TI |
2183 | if (is_playback) |
2184 | avail = snd_pcm_playback_avail(runtime); | |
2185 | else | |
2186 | avail = snd_pcm_capture_avail(runtime); | |
1da177e4 LT |
2187 | while (size > 0) { |
2188 | snd_pcm_uframes_t frames, appl_ptr, appl_ofs; | |
1da177e4 | 2189 | snd_pcm_uframes_t cont; |
13075510 | 2190 | if (!avail) { |
5c7264cf TI |
2191 | if (!is_playback && |
2192 | runtime->status->state == SNDRV_PCM_STATE_DRAINING) { | |
13075510 | 2193 | snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP); |
1da177e4 LT |
2194 | goto _end_unlock; |
2195 | } | |
1da177e4 LT |
2196 | if (nonblock) { |
2197 | err = -EAGAIN; | |
2198 | goto _end_unlock; | |
2199 | } | |
5daeba34 DD |
2200 | runtime->twake = min_t(snd_pcm_uframes_t, size, |
2201 | runtime->control->avail_min ? : 1); | |
2202 | err = wait_for_avail(substream, &avail); | |
13075510 | 2203 | if (err < 0) |
443feb88 | 2204 | goto _end_unlock; |
13075510 TI |
2205 | if (!avail) |
2206 | continue; /* draining */ | |
1da177e4 | 2207 | } |
1da177e4 | 2208 | frames = size > avail ? avail : size; |
aa30db06 TI |
2209 | appl_ptr = READ_ONCE(runtime->control->appl_ptr); |
2210 | appl_ofs = appl_ptr % runtime->buffer_size; | |
2211 | cont = runtime->buffer_size - appl_ofs; | |
1da177e4 LT |
2212 | if (frames > cont) |
2213 | frames = cont; | |
7eaa943c | 2214 | if (snd_BUG_ON(!frames)) { |
c91a988d | 2215 | runtime->twake = 0; |
7eaa943c TI |
2216 | snd_pcm_stream_unlock_irq(substream); |
2217 | return -EINVAL; | |
2218 | } | |
1da177e4 | 2219 | snd_pcm_stream_unlock_irq(substream); |
5c7264cf | 2220 | err = writer(substream, appl_ofs, data, offset, frames, |
9f600630 | 2221 | transfer); |
1da177e4 | 2222 | snd_pcm_stream_lock_irq(substream); |
1250932e JK |
2223 | if (err < 0) |
2224 | goto _end_unlock; | |
6ba63929 TI |
2225 | err = pcm_accessible_state(runtime); |
2226 | if (err < 0) | |
1da177e4 | 2227 | goto _end_unlock; |
1da177e4 LT |
2228 | appl_ptr += frames; |
2229 | if (appl_ptr >= runtime->boundary) | |
2230 | appl_ptr -= runtime->boundary; | |
66e01a5c TS |
2231 | err = pcm_lib_apply_appl_ptr(substream, appl_ptr); |
2232 | if (err < 0) | |
2233 | goto _end_unlock; | |
1da177e4 LT |
2234 | |
2235 | offset += frames; | |
2236 | size -= frames; | |
2237 | xfer += frames; | |
0910c216 | 2238 | avail -= frames; |
5c7264cf TI |
2239 | if (is_playback && |
2240 | runtime->status->state == SNDRV_PCM_STATE_PREPARED && | |
2241 | snd_pcm_playback_hw_avail(runtime) >= (snd_pcm_sframes_t)runtime->start_threshold) { | |
2242 | err = snd_pcm_start(substream); | |
2243 | if (err < 0) | |
2244 | goto _end_unlock; | |
2245 | } | |
1da177e4 LT |
2246 | } |
2247 | _end_unlock: | |
c91a988d | 2248 | runtime->twake = 0; |
1250932e JK |
2249 | if (xfer > 0 && err >= 0) |
2250 | snd_pcm_update_state(substream, runtime); | |
1da177e4 | 2251 | snd_pcm_stream_unlock_irq(substream); |
1da177e4 LT |
2252 | return xfer > 0 ? (snd_pcm_sframes_t)xfer : err; |
2253 | } | |
5c7264cf | 2254 | EXPORT_SYMBOL(__snd_pcm_lib_xfer); |
2d3391ec TI |
2255 | |
2256 | /* | |
2257 | * standard channel mapping helpers | |
2258 | */ | |
2259 | ||
2260 | /* default channel maps for multi-channel playbacks, up to 8 channels */ | |
2261 | const struct snd_pcm_chmap_elem snd_pcm_std_chmaps[] = { | |
2262 | { .channels = 1, | |
5efbc261 | 2263 | .map = { SNDRV_CHMAP_MONO } }, |
2d3391ec TI |
2264 | { .channels = 2, |
2265 | .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR } }, | |
2266 | { .channels = 4, | |
2267 | .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, | |
2268 | SNDRV_CHMAP_RL, SNDRV_CHMAP_RR } }, | |
2269 | { .channels = 6, | |
2270 | .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, | |
2271 | SNDRV_CHMAP_RL, SNDRV_CHMAP_RR, | |
2272 | SNDRV_CHMAP_FC, SNDRV_CHMAP_LFE } }, | |
2273 | { .channels = 8, | |
2274 | .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, | |
2275 | SNDRV_CHMAP_RL, SNDRV_CHMAP_RR, | |
2276 | SNDRV_CHMAP_FC, SNDRV_CHMAP_LFE, | |
2277 | SNDRV_CHMAP_SL, SNDRV_CHMAP_SR } }, | |
2278 | { } | |
2279 | }; | |
2280 | EXPORT_SYMBOL_GPL(snd_pcm_std_chmaps); | |
2281 | ||
2282 | /* alternative channel maps with CLFE <-> surround swapped for 6/8 channels */ | |
2283 | const struct snd_pcm_chmap_elem snd_pcm_alt_chmaps[] = { | |
2284 | { .channels = 1, | |
5efbc261 | 2285 | .map = { SNDRV_CHMAP_MONO } }, |
2d3391ec TI |
2286 | { .channels = 2, |
2287 | .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR } }, | |
2288 | { .channels = 4, | |
2289 | .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, | |
2290 | SNDRV_CHMAP_RL, SNDRV_CHMAP_RR } }, | |
2291 | { .channels = 6, | |
2292 | .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, | |
2293 | SNDRV_CHMAP_FC, SNDRV_CHMAP_LFE, | |
2294 | SNDRV_CHMAP_RL, SNDRV_CHMAP_RR } }, | |
2295 | { .channels = 8, | |
2296 | .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, | |
2297 | SNDRV_CHMAP_FC, SNDRV_CHMAP_LFE, | |
2298 | SNDRV_CHMAP_RL, SNDRV_CHMAP_RR, | |
2299 | SNDRV_CHMAP_SL, SNDRV_CHMAP_SR } }, | |
2300 | { } | |
2301 | }; | |
2302 | EXPORT_SYMBOL_GPL(snd_pcm_alt_chmaps); | |
2303 | ||
2304 | static bool valid_chmap_channels(const struct snd_pcm_chmap *info, int ch) | |
2305 | { | |
2306 | if (ch > info->max_channels) | |
2307 | return false; | |
2308 | return !info->channel_mask || (info->channel_mask & (1U << ch)); | |
2309 | } | |
2310 | ||
2311 | static int pcm_chmap_ctl_info(struct snd_kcontrol *kcontrol, | |
2312 | struct snd_ctl_elem_info *uinfo) | |
2313 | { | |
2314 | struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol); | |
2315 | ||
2316 | uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; | |
2317 | uinfo->count = 0; | |
2318 | uinfo->count = info->max_channels; | |
2319 | uinfo->value.integer.min = 0; | |
2320 | uinfo->value.integer.max = SNDRV_CHMAP_LAST; | |
2321 | return 0; | |
2322 | } | |
2323 | ||
2324 | /* get callback for channel map ctl element | |
2325 | * stores the channel position firstly matching with the current channels | |
2326 | */ | |
2327 | static int pcm_chmap_ctl_get(struct snd_kcontrol *kcontrol, | |
2328 | struct snd_ctl_elem_value *ucontrol) | |
2329 | { | |
2330 | struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol); | |
2331 | unsigned int idx = snd_ctl_get_ioffidx(kcontrol, &ucontrol->id); | |
2332 | struct snd_pcm_substream *substream; | |
2333 | const struct snd_pcm_chmap_elem *map; | |
2334 | ||
2deaeaf1 | 2335 | if (!info->chmap) |
2d3391ec TI |
2336 | return -EINVAL; |
2337 | substream = snd_pcm_chmap_substream(info, idx); | |
2338 | if (!substream) | |
2339 | return -ENODEV; | |
2340 | memset(ucontrol->value.integer.value, 0, | |
2341 | sizeof(ucontrol->value.integer.value)); | |
2342 | if (!substream->runtime) | |
2343 | return 0; /* no channels set */ | |
2344 | for (map = info->chmap; map->channels; map++) { | |
2345 | int i; | |
2346 | if (map->channels == substream->runtime->channels && | |
2347 | valid_chmap_channels(info, map->channels)) { | |
2348 | for (i = 0; i < map->channels; i++) | |
2349 | ucontrol->value.integer.value[i] = map->map[i]; | |
2350 | return 0; | |
2351 | } | |
2352 | } | |
2353 | return -EINVAL; | |
2354 | } | |
2355 | ||
2356 | /* tlv callback for channel map ctl element | |
2357 | * expands the pre-defined channel maps in a form of TLV | |
2358 | */ | |
2359 | static int pcm_chmap_ctl_tlv(struct snd_kcontrol *kcontrol, int op_flag, | |
2360 | unsigned int size, unsigned int __user *tlv) | |
2361 | { | |
2362 | struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol); | |
2363 | const struct snd_pcm_chmap_elem *map; | |
2364 | unsigned int __user *dst; | |
2365 | int c, count = 0; | |
2366 | ||
2deaeaf1 | 2367 | if (!info->chmap) |
2d3391ec TI |
2368 | return -EINVAL; |
2369 | if (size < 8) | |
2370 | return -ENOMEM; | |
2371 | if (put_user(SNDRV_CTL_TLVT_CONTAINER, tlv)) | |
2372 | return -EFAULT; | |
2373 | size -= 8; | |
2374 | dst = tlv + 2; | |
2375 | for (map = info->chmap; map->channels; map++) { | |
2376 | int chs_bytes = map->channels * 4; | |
2377 | if (!valid_chmap_channels(info, map->channels)) | |
2378 | continue; | |
2379 | if (size < 8) | |
2380 | return -ENOMEM; | |
2381 | if (put_user(SNDRV_CTL_TLVT_CHMAP_FIXED, dst) || | |
2382 | put_user(chs_bytes, dst + 1)) | |
2383 | return -EFAULT; | |
2384 | dst += 2; | |
2385 | size -= 8; | |
2386 | count += 8; | |
2387 | if (size < chs_bytes) | |
2388 | return -ENOMEM; | |
2389 | size -= chs_bytes; | |
2390 | count += chs_bytes; | |
2391 | for (c = 0; c < map->channels; c++) { | |
2392 | if (put_user(map->map[c], dst)) | |
2393 | return -EFAULT; | |
2394 | dst++; | |
2395 | } | |
2396 | } | |
2397 | if (put_user(count, tlv + 1)) | |
2398 | return -EFAULT; | |
2399 | return 0; | |
2400 | } | |
2401 | ||
2402 | static void pcm_chmap_ctl_private_free(struct snd_kcontrol *kcontrol) | |
2403 | { | |
2404 | struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol); | |
2405 | info->pcm->streams[info->stream].chmap_kctl = NULL; | |
2406 | kfree(info); | |
2407 | } | |
2408 | ||
2409 | /** | |
2410 | * snd_pcm_add_chmap_ctls - create channel-mapping control elements | |
2411 | * @pcm: the assigned PCM instance | |
2412 | * @stream: stream direction | |
2413 | * @chmap: channel map elements (for query) | |
2414 | * @max_channels: the max number of channels for the stream | |
2415 | * @private_value: the value passed to each kcontrol's private_value field | |
2416 | * @info_ret: store struct snd_pcm_chmap instance if non-NULL | |
2417 | * | |
2418 | * Create channel-mapping control elements assigned to the given PCM stream(s). | |
eb7c06e8 | 2419 | * Return: Zero if successful, or a negative error value. |
2d3391ec TI |
2420 | */ |
2421 | int snd_pcm_add_chmap_ctls(struct snd_pcm *pcm, int stream, | |
2422 | const struct snd_pcm_chmap_elem *chmap, | |
2423 | int max_channels, | |
2424 | unsigned long private_value, | |
2425 | struct snd_pcm_chmap **info_ret) | |
2426 | { | |
2427 | struct snd_pcm_chmap *info; | |
2428 | struct snd_kcontrol_new knew = { | |
2429 | .iface = SNDRV_CTL_ELEM_IFACE_PCM, | |
2430 | .access = SNDRV_CTL_ELEM_ACCESS_READ | | |
2d3391ec TI |
2431 | SNDRV_CTL_ELEM_ACCESS_TLV_READ | |
2432 | SNDRV_CTL_ELEM_ACCESS_TLV_CALLBACK, | |
2433 | .info = pcm_chmap_ctl_info, | |
2434 | .get = pcm_chmap_ctl_get, | |
2435 | .tlv.c = pcm_chmap_ctl_tlv, | |
2436 | }; | |
2437 | int err; | |
2438 | ||
8d879be8 TI |
2439 | if (WARN_ON(pcm->streams[stream].chmap_kctl)) |
2440 | return -EBUSY; | |
2d3391ec TI |
2441 | info = kzalloc(sizeof(*info), GFP_KERNEL); |
2442 | if (!info) | |
2443 | return -ENOMEM; | |
2444 | info->pcm = pcm; | |
2445 | info->stream = stream; | |
2446 | info->chmap = chmap; | |
2447 | info->max_channels = max_channels; | |
2448 | if (stream == SNDRV_PCM_STREAM_PLAYBACK) | |
2449 | knew.name = "Playback Channel Map"; | |
2450 | else | |
2451 | knew.name = "Capture Channel Map"; | |
2452 | knew.device = pcm->device; | |
2453 | knew.count = pcm->streams[stream].substream_count; | |
2454 | knew.private_value = private_value; | |
2455 | info->kctl = snd_ctl_new1(&knew, info); | |
2456 | if (!info->kctl) { | |
2457 | kfree(info); | |
2458 | return -ENOMEM; | |
2459 | } | |
2460 | info->kctl->private_free = pcm_chmap_ctl_private_free; | |
2461 | err = snd_ctl_add(pcm->card, info->kctl); | |
2462 | if (err < 0) | |
2463 | return err; | |
2464 | pcm->streams[stream].chmap_kctl = info->kctl; | |
2465 | if (info_ret) | |
2466 | *info_ret = info; | |
2467 | return 0; | |
2468 | } | |
2469 | EXPORT_SYMBOL_GPL(snd_pcm_add_chmap_ctls); |