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 | ||
763e5067 | 194 | avail = snd_pcm_avail(substream); |
1da177e4 LT |
195 | if (avail > runtime->avail_max) |
196 | runtime->avail_max = avail; | |
4cdc115f TI |
197 | if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) { |
198 | if (avail >= runtime->buffer_size) { | |
1da177e4 | 199 | snd_pcm_drain_done(substream); |
4cdc115f TI |
200 | return -EPIPE; |
201 | } | |
202 | } else { | |
203 | if (avail >= runtime->stop_threshold) { | |
1da177e4 | 204 | xrun(substream); |
4cdc115f TI |
205 | return -EPIPE; |
206 | } | |
1da177e4 | 207 | } |
5daeba34 DD |
208 | if (runtime->twake) { |
209 | if (avail >= runtime->twake) | |
210 | wake_up(&runtime->tsleep); | |
211 | } else if (avail >= runtime->control->avail_min) | |
212 | wake_up(&runtime->sleep); | |
1da177e4 LT |
213 | return 0; |
214 | } | |
215 | ||
3179f620 PLB |
216 | static void update_audio_tstamp(struct snd_pcm_substream *substream, |
217 | struct timespec *curr_tstamp, | |
218 | struct timespec *audio_tstamp) | |
219 | { | |
220 | struct snd_pcm_runtime *runtime = substream->runtime; | |
221 | u64 audio_frames, audio_nsecs; | |
222 | struct timespec driver_tstamp; | |
223 | ||
224 | if (runtime->tstamp_mode != SNDRV_PCM_TSTAMP_ENABLE) | |
225 | return; | |
226 | ||
227 | if (!(substream->ops->get_time_info) || | |
228 | (runtime->audio_tstamp_report.actual_type == | |
229 | SNDRV_PCM_AUDIO_TSTAMP_TYPE_DEFAULT)) { | |
230 | ||
231 | /* | |
232 | * provide audio timestamp derived from pointer position | |
233 | * add delay only if requested | |
234 | */ | |
235 | ||
236 | audio_frames = runtime->hw_ptr_wrap + runtime->status->hw_ptr; | |
237 | ||
238 | if (runtime->audio_tstamp_config.report_delay) { | |
239 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) | |
240 | audio_frames -= runtime->delay; | |
241 | else | |
242 | audio_frames += runtime->delay; | |
243 | } | |
244 | audio_nsecs = div_u64(audio_frames * 1000000000LL, | |
245 | runtime->rate); | |
246 | *audio_tstamp = ns_to_timespec(audio_nsecs); | |
247 | } | |
20e3f985 HE |
248 | if (!timespec_equal(&runtime->status->audio_tstamp, audio_tstamp)) { |
249 | runtime->status->audio_tstamp = *audio_tstamp; | |
250 | runtime->status->tstamp = *curr_tstamp; | |
251 | } | |
3179f620 PLB |
252 | |
253 | /* | |
254 | * re-take a driver timestamp to let apps detect if the reference tstamp | |
255 | * read by low-level hardware was provided with a delay | |
256 | */ | |
257 | snd_pcm_gettime(substream->runtime, (struct timespec *)&driver_tstamp); | |
258 | runtime->driver_tstamp = driver_tstamp; | |
259 | } | |
260 | ||
f240406b JK |
261 | static int snd_pcm_update_hw_ptr0(struct snd_pcm_substream *substream, |
262 | unsigned int in_interrupt) | |
1da177e4 | 263 | { |
877211f5 | 264 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 | 265 | snd_pcm_uframes_t pos; |
f240406b | 266 | snd_pcm_uframes_t old_hw_ptr, new_hw_ptr, hw_base; |
bbf6ad13 JK |
267 | snd_pcm_sframes_t hdelta, delta; |
268 | unsigned long jdelta; | |
3509a03f PLB |
269 | unsigned long curr_jiffies; |
270 | struct timespec curr_tstamp; | |
4eeaaeae | 271 | struct timespec audio_tstamp; |
0e8014d7 | 272 | int crossed_boundary = 0; |
1da177e4 | 273 | |
bbf6ad13 | 274 | old_hw_ptr = runtime->status->hw_ptr; |
3509a03f PLB |
275 | |
276 | /* | |
277 | * group pointer, time and jiffies reads to allow for more | |
278 | * accurate correlations/corrections. | |
279 | * The values are stored at the end of this routine after | |
280 | * corrections for hw_ptr position | |
281 | */ | |
f240406b | 282 | pos = substream->ops->pointer(substream); |
3509a03f | 283 | curr_jiffies = jiffies; |
4eeaaeae | 284 | if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) { |
3179f620 PLB |
285 | if ((substream->ops->get_time_info) && |
286 | (runtime->audio_tstamp_config.type_requested != SNDRV_PCM_AUDIO_TSTAMP_TYPE_DEFAULT)) { | |
287 | substream->ops->get_time_info(substream, &curr_tstamp, | |
288 | &audio_tstamp, | |
289 | &runtime->audio_tstamp_config, | |
290 | &runtime->audio_tstamp_report); | |
291 | ||
292 | /* re-test in case tstamp type is not supported in hardware and was demoted to DEFAULT */ | |
293 | if (runtime->audio_tstamp_report.actual_type == SNDRV_PCM_AUDIO_TSTAMP_TYPE_DEFAULT) | |
294 | snd_pcm_gettime(runtime, (struct timespec *)&curr_tstamp); | |
295 | } else | |
296 | snd_pcm_gettime(runtime, (struct timespec *)&curr_tstamp); | |
4eeaaeae PLB |
297 | } |
298 | ||
1da177e4 LT |
299 | if (pos == SNDRV_PCM_POS_XRUN) { |
300 | xrun(substream); | |
301 | return -EPIPE; | |
302 | } | |
f240406b | 303 | if (pos >= runtime->buffer_size) { |
09e56df8 | 304 | if (printk_ratelimit()) { |
f240406b | 305 | char name[16]; |
acb03d44 | 306 | snd_pcm_debug_name(substream, name, sizeof(name)); |
09e56df8 | 307 | pcm_err(substream->pcm, |
0ab1ace8 | 308 | "invalid position: %s, pos = %ld, buffer size = %ld, period size = %ld\n", |
09e56df8 TI |
309 | name, pos, runtime->buffer_size, |
310 | runtime->period_size); | |
f240406b JK |
311 | } |
312 | pos = 0; | |
cedb8118 | 313 | } |
f240406b | 314 | pos -= pos % runtime->min_align; |
f5914908 | 315 | trace_hwptr(substream, pos, in_interrupt); |
ed3da3d9 TI |
316 | hw_base = runtime->hw_ptr_base; |
317 | new_hw_ptr = hw_base + pos; | |
f240406b JK |
318 | if (in_interrupt) { |
319 | /* we know that one period was processed */ | |
320 | /* delta = "expected next hw_ptr" for in_interrupt != 0 */ | |
e7636925 | 321 | delta = runtime->hw_ptr_interrupt + runtime->period_size; |
f240406b | 322 | if (delta > new_hw_ptr) { |
bd76af0f | 323 | /* check for double acknowledged interrupts */ |
3509a03f | 324 | hdelta = curr_jiffies - runtime->hw_ptr_jiffies; |
13a98839 | 325 | if (hdelta > runtime->hw_ptr_buffer_jiffies/2 + 1) { |
bd76af0f | 326 | hw_base += runtime->buffer_size; |
0e8014d7 | 327 | if (hw_base >= runtime->boundary) { |
bd76af0f | 328 | hw_base = 0; |
0e8014d7 PLB |
329 | crossed_boundary++; |
330 | } | |
bd76af0f JK |
331 | new_hw_ptr = hw_base + pos; |
332 | goto __delta; | |
333 | } | |
1da177e4 | 334 | } |
1da177e4 | 335 | } |
f240406b JK |
336 | /* new_hw_ptr might be lower than old_hw_ptr in case when */ |
337 | /* pointer crosses the end of the ring buffer */ | |
338 | if (new_hw_ptr < old_hw_ptr) { | |
339 | hw_base += runtime->buffer_size; | |
0e8014d7 | 340 | if (hw_base >= runtime->boundary) { |
f240406b | 341 | hw_base = 0; |
0e8014d7 PLB |
342 | crossed_boundary++; |
343 | } | |
f240406b JK |
344 | new_hw_ptr = hw_base + pos; |
345 | } | |
346 | __delta: | |
b406e610 CL |
347 | delta = new_hw_ptr - old_hw_ptr; |
348 | if (delta < 0) | |
349 | delta += runtime->boundary; | |
ab69a490 | 350 | |
59ff878f | 351 | if (runtime->no_period_wakeup) { |
12ff414e | 352 | snd_pcm_sframes_t xrun_threshold; |
59ff878f CL |
353 | /* |
354 | * Without regular period interrupts, we have to check | |
355 | * the elapsed time to detect xruns. | |
356 | */ | |
3509a03f | 357 | jdelta = curr_jiffies - runtime->hw_ptr_jiffies; |
47228e48 CL |
358 | if (jdelta < runtime->hw_ptr_buffer_jiffies / 2) |
359 | goto no_delta_check; | |
59ff878f | 360 | hdelta = jdelta - delta * HZ / runtime->rate; |
12ff414e KA |
361 | xrun_threshold = runtime->hw_ptr_buffer_jiffies / 2 + 1; |
362 | while (hdelta > xrun_threshold) { | |
59ff878f CL |
363 | delta += runtime->buffer_size; |
364 | hw_base += runtime->buffer_size; | |
0e8014d7 | 365 | if (hw_base >= runtime->boundary) { |
59ff878f | 366 | hw_base = 0; |
0e8014d7 PLB |
367 | crossed_boundary++; |
368 | } | |
59ff878f CL |
369 | new_hw_ptr = hw_base + pos; |
370 | hdelta -= runtime->hw_ptr_buffer_jiffies; | |
371 | } | |
ab69a490 | 372 | goto no_delta_check; |
59ff878f | 373 | } |
ab69a490 | 374 | |
f240406b | 375 | /* something must be really wrong */ |
7b3a177b | 376 | if (delta >= runtime->buffer_size + runtime->period_size) { |
f5914908 TI |
377 | hw_ptr_error(substream, in_interrupt, "Unexpected hw_ptr", |
378 | "(stream=%i, pos=%ld, new_hw_ptr=%ld, old_hw_ptr=%ld)\n", | |
379 | substream->stream, (long)pos, | |
380 | (long)new_hw_ptr, (long)old_hw_ptr); | |
f240406b JK |
381 | return 0; |
382 | } | |
c87d9732 TI |
383 | |
384 | /* Do jiffies check only in xrun_debug mode */ | |
741b20cf | 385 | if (!xrun_debug(substream, XRUN_DEBUG_JIFFIESCHECK)) |
c87d9732 TI |
386 | goto no_jiffies_check; |
387 | ||
3e5b5016 TI |
388 | /* Skip the jiffies check for hardwares with BATCH flag. |
389 | * Such hardware usually just increases the position at each IRQ, | |
390 | * thus it can't give any strange position. | |
391 | */ | |
392 | if (runtime->hw.info & SNDRV_PCM_INFO_BATCH) | |
393 | goto no_jiffies_check; | |
f240406b | 394 | hdelta = delta; |
a4444da3 JK |
395 | if (hdelta < runtime->delay) |
396 | goto no_jiffies_check; | |
397 | hdelta -= runtime->delay; | |
3509a03f | 398 | jdelta = curr_jiffies - runtime->hw_ptr_jiffies; |
bbf6ad13 JK |
399 | if (((hdelta * HZ) / runtime->rate) > jdelta + HZ/100) { |
400 | delta = jdelta / | |
401 | (((runtime->period_size * HZ) / runtime->rate) | |
402 | + HZ/100); | |
f240406b JK |
403 | /* move new_hw_ptr according jiffies not pos variable */ |
404 | new_hw_ptr = old_hw_ptr; | |
ed69c6a8 | 405 | hw_base = delta; |
f240406b JK |
406 | /* use loop to avoid checks for delta overflows */ |
407 | /* the delta value is small or zero in most cases */ | |
408 | while (delta > 0) { | |
409 | new_hw_ptr += runtime->period_size; | |
0e8014d7 | 410 | if (new_hw_ptr >= runtime->boundary) { |
f240406b | 411 | new_hw_ptr -= runtime->boundary; |
0e8014d7 PLB |
412 | crossed_boundary--; |
413 | } | |
f240406b JK |
414 | delta--; |
415 | } | |
416 | /* align hw_base to buffer_size */ | |
f5914908 TI |
417 | hw_ptr_error(substream, in_interrupt, "hw_ptr skipping", |
418 | "(pos=%ld, delta=%ld, period=%ld, jdelta=%lu/%lu/%lu, hw_ptr=%ld/%ld)\n", | |
bbf6ad13 JK |
419 | (long)pos, (long)hdelta, |
420 | (long)runtime->period_size, jdelta, | |
ed69c6a8 | 421 | ((hdelta * HZ) / runtime->rate), hw_base, |
f240406b JK |
422 | (unsigned long)old_hw_ptr, |
423 | (unsigned long)new_hw_ptr); | |
ed69c6a8 JK |
424 | /* reset values to proper state */ |
425 | delta = 0; | |
426 | hw_base = new_hw_ptr - (new_hw_ptr % runtime->buffer_size); | |
bbf6ad13 | 427 | } |
3e5b5016 | 428 | no_jiffies_check: |
bbf6ad13 | 429 | if (delta > runtime->period_size + runtime->period_size / 2) { |
f5914908 TI |
430 | hw_ptr_error(substream, in_interrupt, |
431 | "Lost interrupts?", | |
432 | "(stream=%i, delta=%ld, new_hw_ptr=%ld, old_hw_ptr=%ld)\n", | |
ed3da3d9 | 433 | substream->stream, (long)delta, |
f240406b JK |
434 | (long)new_hw_ptr, |
435 | (long)old_hw_ptr); | |
ed3da3d9 | 436 | } |
f240406b | 437 | |
ab69a490 | 438 | no_delta_check: |
3179f620 PLB |
439 | if (runtime->status->hw_ptr == new_hw_ptr) { |
440 | update_audio_tstamp(substream, &curr_tstamp, &audio_tstamp); | |
f240406b | 441 | return 0; |
3179f620 | 442 | } |
ab1863fc | 443 | |
1da177e4 LT |
444 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && |
445 | runtime->silence_size > 0) | |
446 | snd_pcm_playback_silence(substream, new_hw_ptr); | |
447 | ||
e7636925 | 448 | if (in_interrupt) { |
ead4046b CL |
449 | delta = new_hw_ptr - runtime->hw_ptr_interrupt; |
450 | if (delta < 0) | |
451 | delta += runtime->boundary; | |
452 | delta -= (snd_pcm_uframes_t)delta % runtime->period_size; | |
453 | runtime->hw_ptr_interrupt += delta; | |
454 | if (runtime->hw_ptr_interrupt >= runtime->boundary) | |
455 | runtime->hw_ptr_interrupt -= runtime->boundary; | |
e7636925 | 456 | } |
ed3da3d9 | 457 | runtime->hw_ptr_base = hw_base; |
1da177e4 | 458 | runtime->status->hw_ptr = new_hw_ptr; |
3509a03f | 459 | runtime->hw_ptr_jiffies = curr_jiffies; |
0e8014d7 PLB |
460 | if (crossed_boundary) { |
461 | snd_BUG_ON(crossed_boundary != 1); | |
462 | runtime->hw_ptr_wrap += runtime->boundary; | |
463 | } | |
4eeaaeae | 464 | |
3179f620 | 465 | update_audio_tstamp(substream, &curr_tstamp, &audio_tstamp); |
4eeaaeae | 466 | |
1250932e | 467 | return snd_pcm_update_state(substream, runtime); |
1da177e4 LT |
468 | } |
469 | ||
470 | /* CAUTION: call it with irq disabled */ | |
877211f5 | 471 | int snd_pcm_update_hw_ptr(struct snd_pcm_substream *substream) |
1da177e4 | 472 | { |
f240406b | 473 | return snd_pcm_update_hw_ptr0(substream, 0); |
1da177e4 LT |
474 | } |
475 | ||
476 | /** | |
477 | * snd_pcm_set_ops - set the PCM operators | |
478 | * @pcm: the pcm instance | |
479 | * @direction: stream direction, SNDRV_PCM_STREAM_XXX | |
480 | * @ops: the operator table | |
481 | * | |
482 | * Sets the given PCM operators to the pcm instance. | |
483 | */ | |
e6c2e7eb LPC |
484 | void snd_pcm_set_ops(struct snd_pcm *pcm, int direction, |
485 | const struct snd_pcm_ops *ops) | |
1da177e4 | 486 | { |
877211f5 TI |
487 | struct snd_pcm_str *stream = &pcm->streams[direction]; |
488 | struct snd_pcm_substream *substream; | |
1da177e4 LT |
489 | |
490 | for (substream = stream->substream; substream != NULL; substream = substream->next) | |
491 | substream->ops = ops; | |
492 | } | |
e88e8ae6 | 493 | EXPORT_SYMBOL(snd_pcm_set_ops); |
1da177e4 LT |
494 | |
495 | /** | |
496 | * snd_pcm_sync - set the PCM sync id | |
497 | * @substream: the pcm substream | |
498 | * | |
499 | * Sets the PCM sync identifier for the card. | |
500 | */ | |
877211f5 | 501 | void snd_pcm_set_sync(struct snd_pcm_substream *substream) |
1da177e4 | 502 | { |
877211f5 | 503 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
504 | |
505 | runtime->sync.id32[0] = substream->pcm->card->number; | |
506 | runtime->sync.id32[1] = -1; | |
507 | runtime->sync.id32[2] = -1; | |
508 | runtime->sync.id32[3] = -1; | |
509 | } | |
e88e8ae6 TI |
510 | EXPORT_SYMBOL(snd_pcm_set_sync); |
511 | ||
1da177e4 LT |
512 | /* |
513 | * Standard ioctl routine | |
514 | */ | |
515 | ||
1da177e4 LT |
516 | static inline unsigned int div32(unsigned int a, unsigned int b, |
517 | unsigned int *r) | |
518 | { | |
519 | if (b == 0) { | |
520 | *r = 0; | |
521 | return UINT_MAX; | |
522 | } | |
523 | *r = a % b; | |
524 | return a / b; | |
525 | } | |
526 | ||
527 | static inline unsigned int div_down(unsigned int a, unsigned int b) | |
528 | { | |
529 | if (b == 0) | |
530 | return UINT_MAX; | |
531 | return a / b; | |
532 | } | |
533 | ||
534 | static inline unsigned int div_up(unsigned int a, unsigned int b) | |
535 | { | |
536 | unsigned int r; | |
537 | unsigned int q; | |
538 | if (b == 0) | |
539 | return UINT_MAX; | |
540 | q = div32(a, b, &r); | |
541 | if (r) | |
542 | ++q; | |
543 | return q; | |
544 | } | |
545 | ||
546 | static inline unsigned int mul(unsigned int a, unsigned int b) | |
547 | { | |
548 | if (a == 0) | |
549 | return 0; | |
550 | if (div_down(UINT_MAX, a) < b) | |
551 | return UINT_MAX; | |
552 | return a * b; | |
553 | } | |
554 | ||
555 | static inline unsigned int muldiv32(unsigned int a, unsigned int b, | |
556 | unsigned int c, unsigned int *r) | |
557 | { | |
558 | u_int64_t n = (u_int64_t) a * b; | |
559 | if (c == 0) { | |
1da177e4 LT |
560 | *r = 0; |
561 | return UINT_MAX; | |
562 | } | |
3f7440a6 | 563 | n = div_u64_rem(n, c, r); |
1da177e4 LT |
564 | if (n >= UINT_MAX) { |
565 | *r = 0; | |
566 | return UINT_MAX; | |
567 | } | |
568 | return n; | |
569 | } | |
570 | ||
1da177e4 LT |
571 | /** |
572 | * snd_interval_refine - refine the interval value of configurator | |
573 | * @i: the interval value to refine | |
574 | * @v: the interval value to refer to | |
575 | * | |
576 | * Refines the interval value with the reference value. | |
577 | * The interval is changed to the range satisfying both intervals. | |
578 | * The interval status (min, max, integer, etc.) are evaluated. | |
579 | * | |
eb7c06e8 YB |
580 | * Return: Positive if the value is changed, zero if it's not changed, or a |
581 | * negative error code. | |
1da177e4 | 582 | */ |
877211f5 | 583 | int snd_interval_refine(struct snd_interval *i, const struct snd_interval *v) |
1da177e4 LT |
584 | { |
585 | int changed = 0; | |
7eaa943c TI |
586 | if (snd_BUG_ON(snd_interval_empty(i))) |
587 | return -EINVAL; | |
1da177e4 LT |
588 | if (i->min < v->min) { |
589 | i->min = v->min; | |
590 | i->openmin = v->openmin; | |
591 | changed = 1; | |
592 | } else if (i->min == v->min && !i->openmin && v->openmin) { | |
593 | i->openmin = 1; | |
594 | changed = 1; | |
595 | } | |
596 | if (i->max > v->max) { | |
597 | i->max = v->max; | |
598 | i->openmax = v->openmax; | |
599 | changed = 1; | |
600 | } else if (i->max == v->max && !i->openmax && v->openmax) { | |
601 | i->openmax = 1; | |
602 | changed = 1; | |
603 | } | |
604 | if (!i->integer && v->integer) { | |
605 | i->integer = 1; | |
606 | changed = 1; | |
607 | } | |
608 | if (i->integer) { | |
609 | if (i->openmin) { | |
610 | i->min++; | |
611 | i->openmin = 0; | |
612 | } | |
613 | if (i->openmax) { | |
614 | i->max--; | |
615 | i->openmax = 0; | |
616 | } | |
617 | } else if (!i->openmin && !i->openmax && i->min == i->max) | |
618 | i->integer = 1; | |
619 | if (snd_interval_checkempty(i)) { | |
620 | snd_interval_none(i); | |
621 | return -EINVAL; | |
622 | } | |
623 | return changed; | |
624 | } | |
e88e8ae6 TI |
625 | EXPORT_SYMBOL(snd_interval_refine); |
626 | ||
877211f5 | 627 | static int snd_interval_refine_first(struct snd_interval *i) |
1da177e4 | 628 | { |
7eaa943c TI |
629 | if (snd_BUG_ON(snd_interval_empty(i))) |
630 | return -EINVAL; | |
1da177e4 LT |
631 | if (snd_interval_single(i)) |
632 | return 0; | |
633 | i->max = i->min; | |
634 | i->openmax = i->openmin; | |
635 | if (i->openmax) | |
636 | i->max++; | |
637 | return 1; | |
638 | } | |
639 | ||
877211f5 | 640 | static int snd_interval_refine_last(struct snd_interval *i) |
1da177e4 | 641 | { |
7eaa943c TI |
642 | if (snd_BUG_ON(snd_interval_empty(i))) |
643 | return -EINVAL; | |
1da177e4 LT |
644 | if (snd_interval_single(i)) |
645 | return 0; | |
646 | i->min = i->max; | |
647 | i->openmin = i->openmax; | |
648 | if (i->openmin) | |
649 | i->min--; | |
650 | return 1; | |
651 | } | |
652 | ||
877211f5 | 653 | void snd_interval_mul(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c) |
1da177e4 LT |
654 | { |
655 | if (a->empty || b->empty) { | |
656 | snd_interval_none(c); | |
657 | return; | |
658 | } | |
659 | c->empty = 0; | |
660 | c->min = mul(a->min, b->min); | |
661 | c->openmin = (a->openmin || b->openmin); | |
662 | c->max = mul(a->max, b->max); | |
663 | c->openmax = (a->openmax || b->openmax); | |
664 | c->integer = (a->integer && b->integer); | |
665 | } | |
666 | ||
667 | /** | |
668 | * snd_interval_div - refine the interval value with division | |
df8db936 TI |
669 | * @a: dividend |
670 | * @b: divisor | |
671 | * @c: quotient | |
1da177e4 LT |
672 | * |
673 | * c = a / b | |
674 | * | |
675 | * Returns non-zero if the value is changed, zero if not changed. | |
676 | */ | |
877211f5 | 677 | void snd_interval_div(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c) |
1da177e4 LT |
678 | { |
679 | unsigned int r; | |
680 | if (a->empty || b->empty) { | |
681 | snd_interval_none(c); | |
682 | return; | |
683 | } | |
684 | c->empty = 0; | |
685 | c->min = div32(a->min, b->max, &r); | |
686 | c->openmin = (r || a->openmin || b->openmax); | |
687 | if (b->min > 0) { | |
688 | c->max = div32(a->max, b->min, &r); | |
689 | if (r) { | |
690 | c->max++; | |
691 | c->openmax = 1; | |
692 | } else | |
693 | c->openmax = (a->openmax || b->openmin); | |
694 | } else { | |
695 | c->max = UINT_MAX; | |
696 | c->openmax = 0; | |
697 | } | |
698 | c->integer = 0; | |
699 | } | |
700 | ||
701 | /** | |
702 | * snd_interval_muldivk - refine the interval value | |
df8db936 TI |
703 | * @a: dividend 1 |
704 | * @b: dividend 2 | |
705 | * @k: divisor (as integer) | |
706 | * @c: result | |
707 | * | |
1da177e4 LT |
708 | * c = a * b / k |
709 | * | |
710 | * Returns non-zero if the value is changed, zero if not changed. | |
711 | */ | |
877211f5 TI |
712 | void snd_interval_muldivk(const struct snd_interval *a, const struct snd_interval *b, |
713 | unsigned int k, struct snd_interval *c) | |
1da177e4 LT |
714 | { |
715 | unsigned int r; | |
716 | if (a->empty || b->empty) { | |
717 | snd_interval_none(c); | |
718 | return; | |
719 | } | |
720 | c->empty = 0; | |
721 | c->min = muldiv32(a->min, b->min, k, &r); | |
722 | c->openmin = (r || a->openmin || b->openmin); | |
723 | c->max = muldiv32(a->max, b->max, k, &r); | |
724 | if (r) { | |
725 | c->max++; | |
726 | c->openmax = 1; | |
727 | } else | |
728 | c->openmax = (a->openmax || b->openmax); | |
729 | c->integer = 0; | |
730 | } | |
731 | ||
732 | /** | |
733 | * snd_interval_mulkdiv - refine the interval value | |
df8db936 TI |
734 | * @a: dividend 1 |
735 | * @k: dividend 2 (as integer) | |
736 | * @b: divisor | |
737 | * @c: result | |
1da177e4 LT |
738 | * |
739 | * c = a * k / b | |
740 | * | |
741 | * Returns non-zero if the value is changed, zero if not changed. | |
742 | */ | |
877211f5 TI |
743 | void snd_interval_mulkdiv(const struct snd_interval *a, unsigned int k, |
744 | const struct snd_interval *b, struct snd_interval *c) | |
1da177e4 LT |
745 | { |
746 | unsigned int r; | |
747 | if (a->empty || b->empty) { | |
748 | snd_interval_none(c); | |
749 | return; | |
750 | } | |
751 | c->empty = 0; | |
752 | c->min = muldiv32(a->min, k, b->max, &r); | |
753 | c->openmin = (r || a->openmin || b->openmax); | |
754 | if (b->min > 0) { | |
755 | c->max = muldiv32(a->max, k, b->min, &r); | |
756 | if (r) { | |
757 | c->max++; | |
758 | c->openmax = 1; | |
759 | } else | |
760 | c->openmax = (a->openmax || b->openmin); | |
761 | } else { | |
762 | c->max = UINT_MAX; | |
763 | c->openmax = 0; | |
764 | } | |
765 | c->integer = 0; | |
766 | } | |
767 | ||
1da177e4 LT |
768 | /* ---- */ |
769 | ||
770 | ||
771 | /** | |
772 | * snd_interval_ratnum - refine the interval value | |
df8db936 TI |
773 | * @i: interval to refine |
774 | * @rats_count: number of ratnum_t | |
775 | * @rats: ratnum_t array | |
776 | * @nump: pointer to store the resultant numerator | |
777 | * @denp: pointer to store the resultant denominator | |
1da177e4 | 778 | * |
eb7c06e8 YB |
779 | * Return: Positive if the value is changed, zero if it's not changed, or a |
780 | * negative error code. | |
1da177e4 | 781 | */ |
877211f5 | 782 | int snd_interval_ratnum(struct snd_interval *i, |
e5e113cf | 783 | unsigned int rats_count, const struct snd_ratnum *rats, |
877211f5 | 784 | unsigned int *nump, unsigned int *denp) |
1da177e4 | 785 | { |
8374e24c KH |
786 | unsigned int best_num, best_den; |
787 | int best_diff; | |
1da177e4 | 788 | unsigned int k; |
877211f5 | 789 | struct snd_interval t; |
1da177e4 | 790 | int err; |
8374e24c KH |
791 | unsigned int result_num, result_den; |
792 | int result_diff; | |
1da177e4 LT |
793 | |
794 | best_num = best_den = best_diff = 0; | |
795 | for (k = 0; k < rats_count; ++k) { | |
796 | unsigned int num = rats[k].num; | |
797 | unsigned int den; | |
798 | unsigned int q = i->min; | |
799 | int diff; | |
800 | if (q == 0) | |
801 | q = 1; | |
40962d7c | 802 | den = div_up(num, q); |
1da177e4 LT |
803 | if (den < rats[k].den_min) |
804 | continue; | |
805 | if (den > rats[k].den_max) | |
806 | den = rats[k].den_max; | |
807 | else { | |
808 | unsigned int r; | |
809 | r = (den - rats[k].den_min) % rats[k].den_step; | |
810 | if (r != 0) | |
811 | den -= r; | |
812 | } | |
813 | diff = num - q * den; | |
8374e24c KH |
814 | if (diff < 0) |
815 | diff = -diff; | |
1da177e4 LT |
816 | if (best_num == 0 || |
817 | diff * best_den < best_diff * den) { | |
818 | best_diff = diff; | |
819 | best_den = den; | |
820 | best_num = num; | |
821 | } | |
822 | } | |
823 | if (best_den == 0) { | |
824 | i->empty = 1; | |
825 | return -EINVAL; | |
826 | } | |
827 | t.min = div_down(best_num, best_den); | |
828 | t.openmin = !!(best_num % best_den); | |
829 | ||
8374e24c KH |
830 | result_num = best_num; |
831 | result_diff = best_diff; | |
832 | result_den = best_den; | |
1da177e4 LT |
833 | best_num = best_den = best_diff = 0; |
834 | for (k = 0; k < rats_count; ++k) { | |
835 | unsigned int num = rats[k].num; | |
836 | unsigned int den; | |
837 | unsigned int q = i->max; | |
838 | int diff; | |
839 | if (q == 0) { | |
840 | i->empty = 1; | |
841 | return -EINVAL; | |
842 | } | |
40962d7c | 843 | den = div_down(num, q); |
1da177e4 LT |
844 | if (den > rats[k].den_max) |
845 | continue; | |
846 | if (den < rats[k].den_min) | |
847 | den = rats[k].den_min; | |
848 | else { | |
849 | unsigned int r; | |
850 | r = (den - rats[k].den_min) % rats[k].den_step; | |
851 | if (r != 0) | |
852 | den += rats[k].den_step - r; | |
853 | } | |
854 | diff = q * den - num; | |
8374e24c KH |
855 | if (diff < 0) |
856 | diff = -diff; | |
1da177e4 LT |
857 | if (best_num == 0 || |
858 | diff * best_den < best_diff * den) { | |
859 | best_diff = diff; | |
860 | best_den = den; | |
861 | best_num = num; | |
862 | } | |
863 | } | |
864 | if (best_den == 0) { | |
865 | i->empty = 1; | |
866 | return -EINVAL; | |
867 | } | |
868 | t.max = div_up(best_num, best_den); | |
869 | t.openmax = !!(best_num % best_den); | |
870 | t.integer = 0; | |
871 | err = snd_interval_refine(i, &t); | |
872 | if (err < 0) | |
873 | return err; | |
874 | ||
875 | if (snd_interval_single(i)) { | |
8374e24c KH |
876 | if (best_diff * result_den < result_diff * best_den) { |
877 | result_num = best_num; | |
878 | result_den = best_den; | |
879 | } | |
1da177e4 | 880 | if (nump) |
8374e24c | 881 | *nump = result_num; |
1da177e4 | 882 | if (denp) |
8374e24c | 883 | *denp = result_den; |
1da177e4 LT |
884 | } |
885 | return err; | |
886 | } | |
e88e8ae6 TI |
887 | EXPORT_SYMBOL(snd_interval_ratnum); |
888 | ||
1da177e4 LT |
889 | /** |
890 | * snd_interval_ratden - refine the interval value | |
df8db936 | 891 | * @i: interval to refine |
877211f5 TI |
892 | * @rats_count: number of struct ratden |
893 | * @rats: struct ratden array | |
df8db936 TI |
894 | * @nump: pointer to store the resultant numerator |
895 | * @denp: pointer to store the resultant denominator | |
1da177e4 | 896 | * |
eb7c06e8 YB |
897 | * Return: Positive if the value is changed, zero if it's not changed, or a |
898 | * negative error code. | |
1da177e4 | 899 | */ |
877211f5 | 900 | static int snd_interval_ratden(struct snd_interval *i, |
e5e113cf LPC |
901 | unsigned int rats_count, |
902 | const struct snd_ratden *rats, | |
1da177e4 LT |
903 | unsigned int *nump, unsigned int *denp) |
904 | { | |
905 | unsigned int best_num, best_diff, best_den; | |
906 | unsigned int k; | |
877211f5 | 907 | struct snd_interval t; |
1da177e4 LT |
908 | int err; |
909 | ||
910 | best_num = best_den = best_diff = 0; | |
911 | for (k = 0; k < rats_count; ++k) { | |
912 | unsigned int num; | |
913 | unsigned int den = rats[k].den; | |
914 | unsigned int q = i->min; | |
915 | int diff; | |
916 | num = mul(q, den); | |
917 | if (num > rats[k].num_max) | |
918 | continue; | |
919 | if (num < rats[k].num_min) | |
920 | num = rats[k].num_max; | |
921 | else { | |
922 | unsigned int r; | |
923 | r = (num - rats[k].num_min) % rats[k].num_step; | |
924 | if (r != 0) | |
925 | num += rats[k].num_step - r; | |
926 | } | |
927 | diff = num - q * den; | |
928 | if (best_num == 0 || | |
929 | diff * best_den < best_diff * den) { | |
930 | best_diff = diff; | |
931 | best_den = den; | |
932 | best_num = num; | |
933 | } | |
934 | } | |
935 | if (best_den == 0) { | |
936 | i->empty = 1; | |
937 | return -EINVAL; | |
938 | } | |
939 | t.min = div_down(best_num, best_den); | |
940 | t.openmin = !!(best_num % best_den); | |
941 | ||
942 | best_num = best_den = best_diff = 0; | |
943 | for (k = 0; k < rats_count; ++k) { | |
944 | unsigned int num; | |
945 | unsigned int den = rats[k].den; | |
946 | unsigned int q = i->max; | |
947 | int diff; | |
948 | num = mul(q, den); | |
949 | if (num < rats[k].num_min) | |
950 | continue; | |
951 | if (num > rats[k].num_max) | |
952 | num = rats[k].num_max; | |
953 | else { | |
954 | unsigned int r; | |
955 | r = (num - rats[k].num_min) % rats[k].num_step; | |
956 | if (r != 0) | |
957 | num -= r; | |
958 | } | |
959 | diff = q * den - num; | |
960 | if (best_num == 0 || | |
961 | diff * best_den < best_diff * den) { | |
962 | best_diff = diff; | |
963 | best_den = den; | |
964 | best_num = num; | |
965 | } | |
966 | } | |
967 | if (best_den == 0) { | |
968 | i->empty = 1; | |
969 | return -EINVAL; | |
970 | } | |
971 | t.max = div_up(best_num, best_den); | |
972 | t.openmax = !!(best_num % best_den); | |
973 | t.integer = 0; | |
974 | err = snd_interval_refine(i, &t); | |
975 | if (err < 0) | |
976 | return err; | |
977 | ||
978 | if (snd_interval_single(i)) { | |
979 | if (nump) | |
980 | *nump = best_num; | |
981 | if (denp) | |
982 | *denp = best_den; | |
983 | } | |
984 | return err; | |
985 | } | |
986 | ||
987 | /** | |
988 | * snd_interval_list - refine the interval value from the list | |
989 | * @i: the interval value to refine | |
990 | * @count: the number of elements in the list | |
991 | * @list: the value list | |
992 | * @mask: the bit-mask to evaluate | |
993 | * | |
994 | * Refines the interval value from the list. | |
995 | * When mask is non-zero, only the elements corresponding to bit 1 are | |
996 | * evaluated. | |
997 | * | |
eb7c06e8 YB |
998 | * Return: Positive if the value is changed, zero if it's not changed, or a |
999 | * negative error code. | |
1da177e4 | 1000 | */ |
4af87a93 MB |
1001 | int snd_interval_list(struct snd_interval *i, unsigned int count, |
1002 | const unsigned int *list, unsigned int mask) | |
1da177e4 LT |
1003 | { |
1004 | unsigned int k; | |
b1ddaf68 | 1005 | struct snd_interval list_range; |
0981a260 TI |
1006 | |
1007 | if (!count) { | |
1008 | i->empty = 1; | |
1009 | return -EINVAL; | |
1010 | } | |
b1ddaf68 CL |
1011 | snd_interval_any(&list_range); |
1012 | list_range.min = UINT_MAX; | |
1013 | list_range.max = 0; | |
1da177e4 LT |
1014 | for (k = 0; k < count; k++) { |
1015 | if (mask && !(mask & (1 << k))) | |
1016 | continue; | |
b1ddaf68 | 1017 | if (!snd_interval_test(i, list[k])) |
1da177e4 | 1018 | continue; |
b1ddaf68 CL |
1019 | list_range.min = min(list_range.min, list[k]); |
1020 | list_range.max = max(list_range.max, list[k]); | |
1da177e4 | 1021 | } |
b1ddaf68 | 1022 | return snd_interval_refine(i, &list_range); |
1da177e4 | 1023 | } |
e88e8ae6 TI |
1024 | EXPORT_SYMBOL(snd_interval_list); |
1025 | ||
f66f898e PR |
1026 | /** |
1027 | * snd_interval_ranges - refine the interval value from the list of ranges | |
1028 | * @i: the interval value to refine | |
1029 | * @count: the number of elements in the list of ranges | |
1030 | * @ranges: the ranges list | |
1031 | * @mask: the bit-mask to evaluate | |
1032 | * | |
1033 | * Refines the interval value from the list of ranges. | |
1034 | * When mask is non-zero, only the elements corresponding to bit 1 are | |
1035 | * evaluated. | |
1036 | * | |
1037 | * Return: Positive if the value is changed, zero if it's not changed, or a | |
1038 | * negative error code. | |
1039 | */ | |
1040 | int snd_interval_ranges(struct snd_interval *i, unsigned int count, | |
1041 | const struct snd_interval *ranges, unsigned int mask) | |
1042 | { | |
1043 | unsigned int k; | |
1044 | struct snd_interval range_union; | |
1045 | struct snd_interval range; | |
1046 | ||
1047 | if (!count) { | |
1048 | snd_interval_none(i); | |
1049 | return -EINVAL; | |
1050 | } | |
1051 | snd_interval_any(&range_union); | |
1052 | range_union.min = UINT_MAX; | |
1053 | range_union.max = 0; | |
1054 | for (k = 0; k < count; k++) { | |
1055 | if (mask && !(mask & (1 << k))) | |
1056 | continue; | |
1057 | snd_interval_copy(&range, &ranges[k]); | |
1058 | if (snd_interval_refine(&range, i) < 0) | |
1059 | continue; | |
1060 | if (snd_interval_empty(&range)) | |
1061 | continue; | |
1062 | ||
1063 | if (range.min < range_union.min) { | |
1064 | range_union.min = range.min; | |
1065 | range_union.openmin = 1; | |
1066 | } | |
1067 | if (range.min == range_union.min && !range.openmin) | |
1068 | range_union.openmin = 0; | |
1069 | if (range.max > range_union.max) { | |
1070 | range_union.max = range.max; | |
1071 | range_union.openmax = 1; | |
1072 | } | |
1073 | if (range.max == range_union.max && !range.openmax) | |
1074 | range_union.openmax = 0; | |
1075 | } | |
1076 | return snd_interval_refine(i, &range_union); | |
1077 | } | |
1078 | EXPORT_SYMBOL(snd_interval_ranges); | |
1079 | ||
0f519b62 | 1080 | static int snd_interval_step(struct snd_interval *i, unsigned int step) |
1da177e4 LT |
1081 | { |
1082 | unsigned int n; | |
1083 | int changed = 0; | |
0f519b62 | 1084 | n = i->min % step; |
1da177e4 LT |
1085 | if (n != 0 || i->openmin) { |
1086 | i->min += step - n; | |
df1e4719 | 1087 | i->openmin = 0; |
1da177e4 LT |
1088 | changed = 1; |
1089 | } | |
0f519b62 | 1090 | n = i->max % step; |
1da177e4 LT |
1091 | if (n != 0 || i->openmax) { |
1092 | i->max -= n; | |
df1e4719 | 1093 | i->openmax = 0; |
1da177e4 LT |
1094 | changed = 1; |
1095 | } | |
1096 | if (snd_interval_checkempty(i)) { | |
1097 | i->empty = 1; | |
1098 | return -EINVAL; | |
1099 | } | |
1100 | return changed; | |
1101 | } | |
1102 | ||
1103 | /* Info constraints helpers */ | |
1104 | ||
1105 | /** | |
1106 | * snd_pcm_hw_rule_add - add the hw-constraint rule | |
1107 | * @runtime: the pcm runtime instance | |
1108 | * @cond: condition bits | |
1109 | * @var: the variable to evaluate | |
1110 | * @func: the evaluation function | |
1111 | * @private: the private data pointer passed to function | |
1112 | * @dep: the dependent variables | |
1113 | * | |
eb7c06e8 | 1114 | * Return: Zero if successful, or a negative error code on failure. |
1da177e4 | 1115 | */ |
877211f5 | 1116 | int snd_pcm_hw_rule_add(struct snd_pcm_runtime *runtime, unsigned int cond, |
1da177e4 LT |
1117 | int var, |
1118 | snd_pcm_hw_rule_func_t func, void *private, | |
1119 | int dep, ...) | |
1120 | { | |
877211f5 TI |
1121 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; |
1122 | struct snd_pcm_hw_rule *c; | |
1da177e4 LT |
1123 | unsigned int k; |
1124 | va_list args; | |
1125 | va_start(args, dep); | |
1126 | if (constrs->rules_num >= constrs->rules_all) { | |
877211f5 | 1127 | struct snd_pcm_hw_rule *new; |
1da177e4 | 1128 | unsigned int new_rules = constrs->rules_all + 16; |
09b9ddfa TI |
1129 | new = krealloc(constrs->rules, new_rules * sizeof(*c), |
1130 | GFP_KERNEL); | |
87a1c8aa JJ |
1131 | if (!new) { |
1132 | va_end(args); | |
1da177e4 | 1133 | return -ENOMEM; |
87a1c8aa | 1134 | } |
1da177e4 LT |
1135 | constrs->rules = new; |
1136 | constrs->rules_all = new_rules; | |
1137 | } | |
1138 | c = &constrs->rules[constrs->rules_num]; | |
1139 | c->cond = cond; | |
1140 | c->func = func; | |
1141 | c->var = var; | |
1142 | c->private = private; | |
1143 | k = 0; | |
1144 | while (1) { | |
87a1c8aa JJ |
1145 | if (snd_BUG_ON(k >= ARRAY_SIZE(c->deps))) { |
1146 | va_end(args); | |
7eaa943c | 1147 | return -EINVAL; |
87a1c8aa | 1148 | } |
1da177e4 LT |
1149 | c->deps[k++] = dep; |
1150 | if (dep < 0) | |
1151 | break; | |
1152 | dep = va_arg(args, int); | |
1153 | } | |
1154 | constrs->rules_num++; | |
1155 | va_end(args); | |
1156 | return 0; | |
87a1c8aa | 1157 | } |
e88e8ae6 TI |
1158 | EXPORT_SYMBOL(snd_pcm_hw_rule_add); |
1159 | ||
1da177e4 | 1160 | /** |
1c85cc64 | 1161 | * snd_pcm_hw_constraint_mask - apply the given bitmap mask constraint |
df8db936 TI |
1162 | * @runtime: PCM runtime instance |
1163 | * @var: hw_params variable to apply the mask | |
1164 | * @mask: the bitmap mask | |
1165 | * | |
1c85cc64 | 1166 | * Apply the constraint of the given bitmap mask to a 32-bit mask parameter. |
eb7c06e8 YB |
1167 | * |
1168 | * Return: Zero if successful, or a negative error code on failure. | |
1da177e4 | 1169 | */ |
877211f5 | 1170 | int snd_pcm_hw_constraint_mask(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, |
1da177e4 LT |
1171 | u_int32_t mask) |
1172 | { | |
877211f5 TI |
1173 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; |
1174 | struct snd_mask *maskp = constrs_mask(constrs, var); | |
1da177e4 LT |
1175 | *maskp->bits &= mask; |
1176 | memset(maskp->bits + 1, 0, (SNDRV_MASK_MAX-32) / 8); /* clear rest */ | |
1177 | if (*maskp->bits == 0) | |
1178 | return -EINVAL; | |
1179 | return 0; | |
1180 | } | |
1181 | ||
1182 | /** | |
1c85cc64 | 1183 | * snd_pcm_hw_constraint_mask64 - apply the given bitmap mask constraint |
df8db936 TI |
1184 | * @runtime: PCM runtime instance |
1185 | * @var: hw_params variable to apply the mask | |
1186 | * @mask: the 64bit bitmap mask | |
1187 | * | |
1c85cc64 | 1188 | * Apply the constraint of the given bitmap mask to a 64-bit mask parameter. |
eb7c06e8 YB |
1189 | * |
1190 | * Return: Zero if successful, or a negative error code on failure. | |
1da177e4 | 1191 | */ |
877211f5 | 1192 | int snd_pcm_hw_constraint_mask64(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, |
1da177e4 LT |
1193 | u_int64_t mask) |
1194 | { | |
877211f5 TI |
1195 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; |
1196 | struct snd_mask *maskp = constrs_mask(constrs, var); | |
1da177e4 LT |
1197 | maskp->bits[0] &= (u_int32_t)mask; |
1198 | maskp->bits[1] &= (u_int32_t)(mask >> 32); | |
1199 | memset(maskp->bits + 2, 0, (SNDRV_MASK_MAX-64) / 8); /* clear rest */ | |
1200 | if (! maskp->bits[0] && ! maskp->bits[1]) | |
1201 | return -EINVAL; | |
1202 | return 0; | |
1203 | } | |
63a5d4c6 | 1204 | EXPORT_SYMBOL(snd_pcm_hw_constraint_mask64); |
1da177e4 LT |
1205 | |
1206 | /** | |
1c85cc64 | 1207 | * snd_pcm_hw_constraint_integer - apply an integer constraint to an interval |
df8db936 TI |
1208 | * @runtime: PCM runtime instance |
1209 | * @var: hw_params variable to apply the integer constraint | |
1210 | * | |
1211 | * Apply the constraint of integer to an interval parameter. | |
eb7c06e8 YB |
1212 | * |
1213 | * Return: Positive if the value is changed, zero if it's not changed, or a | |
1214 | * negative error code. | |
1da177e4 | 1215 | */ |
877211f5 | 1216 | int snd_pcm_hw_constraint_integer(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var) |
1da177e4 | 1217 | { |
877211f5 | 1218 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; |
1da177e4 LT |
1219 | return snd_interval_setinteger(constrs_interval(constrs, var)); |
1220 | } | |
e88e8ae6 TI |
1221 | EXPORT_SYMBOL(snd_pcm_hw_constraint_integer); |
1222 | ||
1da177e4 | 1223 | /** |
1c85cc64 | 1224 | * snd_pcm_hw_constraint_minmax - apply a min/max range constraint to an interval |
df8db936 TI |
1225 | * @runtime: PCM runtime instance |
1226 | * @var: hw_params variable to apply the range | |
1227 | * @min: the minimal value | |
1228 | * @max: the maximal value | |
1229 | * | |
1230 | * Apply the min/max range constraint to an interval parameter. | |
eb7c06e8 YB |
1231 | * |
1232 | * Return: Positive if the value is changed, zero if it's not changed, or a | |
1233 | * negative error code. | |
1da177e4 | 1234 | */ |
877211f5 | 1235 | int snd_pcm_hw_constraint_minmax(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, |
1da177e4 LT |
1236 | unsigned int min, unsigned int max) |
1237 | { | |
877211f5 TI |
1238 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; |
1239 | struct snd_interval t; | |
1da177e4 LT |
1240 | t.min = min; |
1241 | t.max = max; | |
1242 | t.openmin = t.openmax = 0; | |
1243 | t.integer = 0; | |
1244 | return snd_interval_refine(constrs_interval(constrs, var), &t); | |
1245 | } | |
e88e8ae6 TI |
1246 | EXPORT_SYMBOL(snd_pcm_hw_constraint_minmax); |
1247 | ||
877211f5 TI |
1248 | static int snd_pcm_hw_rule_list(struct snd_pcm_hw_params *params, |
1249 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 1250 | { |
877211f5 | 1251 | struct snd_pcm_hw_constraint_list *list = rule->private; |
1da177e4 LT |
1252 | return snd_interval_list(hw_param_interval(params, rule->var), list->count, list->list, list->mask); |
1253 | } | |
1254 | ||
1255 | ||
1256 | /** | |
1c85cc64 | 1257 | * snd_pcm_hw_constraint_list - apply a list of constraints to a parameter |
df8db936 TI |
1258 | * @runtime: PCM runtime instance |
1259 | * @cond: condition bits | |
1260 | * @var: hw_params variable to apply the list constraint | |
1261 | * @l: list | |
1262 | * | |
1263 | * Apply the list of constraints to an interval parameter. | |
eb7c06e8 YB |
1264 | * |
1265 | * Return: Zero if successful, or a negative error code on failure. | |
1da177e4 | 1266 | */ |
877211f5 | 1267 | int snd_pcm_hw_constraint_list(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1268 | unsigned int cond, |
1269 | snd_pcm_hw_param_t var, | |
1464189f | 1270 | const struct snd_pcm_hw_constraint_list *l) |
1da177e4 LT |
1271 | { |
1272 | return snd_pcm_hw_rule_add(runtime, cond, var, | |
1464189f | 1273 | snd_pcm_hw_rule_list, (void *)l, |
1da177e4 LT |
1274 | var, -1); |
1275 | } | |
e88e8ae6 TI |
1276 | EXPORT_SYMBOL(snd_pcm_hw_constraint_list); |
1277 | ||
f66f898e PR |
1278 | static int snd_pcm_hw_rule_ranges(struct snd_pcm_hw_params *params, |
1279 | struct snd_pcm_hw_rule *rule) | |
1280 | { | |
1281 | struct snd_pcm_hw_constraint_ranges *r = rule->private; | |
1282 | return snd_interval_ranges(hw_param_interval(params, rule->var), | |
1283 | r->count, r->ranges, r->mask); | |
1284 | } | |
1285 | ||
1286 | ||
1287 | /** | |
1288 | * snd_pcm_hw_constraint_ranges - apply list of range constraints to a parameter | |
1289 | * @runtime: PCM runtime instance | |
1290 | * @cond: condition bits | |
1291 | * @var: hw_params variable to apply the list of range constraints | |
1292 | * @r: ranges | |
1293 | * | |
1294 | * Apply the list of range constraints to an interval parameter. | |
1295 | * | |
1296 | * Return: Zero if successful, or a negative error code on failure. | |
1297 | */ | |
1298 | int snd_pcm_hw_constraint_ranges(struct snd_pcm_runtime *runtime, | |
1299 | unsigned int cond, | |
1300 | snd_pcm_hw_param_t var, | |
1301 | const struct snd_pcm_hw_constraint_ranges *r) | |
1302 | { | |
1303 | return snd_pcm_hw_rule_add(runtime, cond, var, | |
1304 | snd_pcm_hw_rule_ranges, (void *)r, | |
1305 | var, -1); | |
1306 | } | |
1307 | EXPORT_SYMBOL(snd_pcm_hw_constraint_ranges); | |
1308 | ||
877211f5 TI |
1309 | static int snd_pcm_hw_rule_ratnums(struct snd_pcm_hw_params *params, |
1310 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 1311 | { |
e5e113cf | 1312 | const struct snd_pcm_hw_constraint_ratnums *r = rule->private; |
1da177e4 LT |
1313 | unsigned int num = 0, den = 0; |
1314 | int err; | |
1315 | err = snd_interval_ratnum(hw_param_interval(params, rule->var), | |
1316 | r->nrats, r->rats, &num, &den); | |
1317 | if (err >= 0 && den && rule->var == SNDRV_PCM_HW_PARAM_RATE) { | |
1318 | params->rate_num = num; | |
1319 | params->rate_den = den; | |
1320 | } | |
1321 | return err; | |
1322 | } | |
1323 | ||
1324 | /** | |
1c85cc64 | 1325 | * snd_pcm_hw_constraint_ratnums - apply ratnums constraint to a parameter |
df8db936 TI |
1326 | * @runtime: PCM runtime instance |
1327 | * @cond: condition bits | |
1328 | * @var: hw_params variable to apply the ratnums constraint | |
877211f5 | 1329 | * @r: struct snd_ratnums constriants |
eb7c06e8 YB |
1330 | * |
1331 | * Return: Zero if successful, or a negative error code on failure. | |
1da177e4 | 1332 | */ |
877211f5 | 1333 | int snd_pcm_hw_constraint_ratnums(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1334 | unsigned int cond, |
1335 | snd_pcm_hw_param_t var, | |
e5e113cf | 1336 | const struct snd_pcm_hw_constraint_ratnums *r) |
1da177e4 LT |
1337 | { |
1338 | return snd_pcm_hw_rule_add(runtime, cond, var, | |
e5e113cf | 1339 | snd_pcm_hw_rule_ratnums, (void *)r, |
1da177e4 LT |
1340 | var, -1); |
1341 | } | |
e88e8ae6 TI |
1342 | EXPORT_SYMBOL(snd_pcm_hw_constraint_ratnums); |
1343 | ||
877211f5 TI |
1344 | static int snd_pcm_hw_rule_ratdens(struct snd_pcm_hw_params *params, |
1345 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 1346 | { |
e5e113cf | 1347 | const struct snd_pcm_hw_constraint_ratdens *r = rule->private; |
1da177e4 LT |
1348 | unsigned int num = 0, den = 0; |
1349 | int err = snd_interval_ratden(hw_param_interval(params, rule->var), | |
1350 | r->nrats, r->rats, &num, &den); | |
1351 | if (err >= 0 && den && rule->var == SNDRV_PCM_HW_PARAM_RATE) { | |
1352 | params->rate_num = num; | |
1353 | params->rate_den = den; | |
1354 | } | |
1355 | return err; | |
1356 | } | |
1357 | ||
1358 | /** | |
1c85cc64 | 1359 | * snd_pcm_hw_constraint_ratdens - apply ratdens constraint to a parameter |
df8db936 TI |
1360 | * @runtime: PCM runtime instance |
1361 | * @cond: condition bits | |
1362 | * @var: hw_params variable to apply the ratdens constraint | |
877211f5 | 1363 | * @r: struct snd_ratdens constriants |
eb7c06e8 YB |
1364 | * |
1365 | * Return: Zero if successful, or a negative error code on failure. | |
1da177e4 | 1366 | */ |
877211f5 | 1367 | int snd_pcm_hw_constraint_ratdens(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1368 | unsigned int cond, |
1369 | snd_pcm_hw_param_t var, | |
e5e113cf | 1370 | const struct snd_pcm_hw_constraint_ratdens *r) |
1da177e4 LT |
1371 | { |
1372 | return snd_pcm_hw_rule_add(runtime, cond, var, | |
e5e113cf | 1373 | snd_pcm_hw_rule_ratdens, (void *)r, |
1da177e4 LT |
1374 | var, -1); |
1375 | } | |
e88e8ae6 TI |
1376 | EXPORT_SYMBOL(snd_pcm_hw_constraint_ratdens); |
1377 | ||
877211f5 TI |
1378 | static int snd_pcm_hw_rule_msbits(struct snd_pcm_hw_params *params, |
1379 | struct snd_pcm_hw_rule *rule) | |
1da177e4 LT |
1380 | { |
1381 | unsigned int l = (unsigned long) rule->private; | |
1382 | int width = l & 0xffff; | |
1383 | unsigned int msbits = l >> 16; | |
b55f9fdc TS |
1384 | const struct snd_interval *i = |
1385 | hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS); | |
8ef9df55 LPC |
1386 | |
1387 | if (!snd_interval_single(i)) | |
1388 | return 0; | |
1389 | ||
1390 | if ((snd_interval_value(i) == width) || | |
1391 | (width == 0 && snd_interval_value(i) > msbits)) | |
19f52fae | 1392 | params->msbits = min_not_zero(params->msbits, msbits); |
8ef9df55 | 1393 | |
1da177e4 LT |
1394 | return 0; |
1395 | } | |
1396 | ||
1397 | /** | |
1c85cc64 | 1398 | * snd_pcm_hw_constraint_msbits - add a hw constraint msbits rule |
df8db936 TI |
1399 | * @runtime: PCM runtime instance |
1400 | * @cond: condition bits | |
1401 | * @width: sample bits width | |
1402 | * @msbits: msbits width | |
eb7c06e8 | 1403 | * |
8ef9df55 LPC |
1404 | * This constraint will set the number of most significant bits (msbits) if a |
1405 | * sample format with the specified width has been select. If width is set to 0 | |
1406 | * the msbits will be set for any sample format with a width larger than the | |
1407 | * specified msbits. | |
1408 | * | |
eb7c06e8 | 1409 | * Return: Zero if successful, or a negative error code on failure. |
1da177e4 | 1410 | */ |
877211f5 | 1411 | int snd_pcm_hw_constraint_msbits(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1412 | unsigned int cond, |
1413 | unsigned int width, | |
1414 | unsigned int msbits) | |
1415 | { | |
1416 | unsigned long l = (msbits << 16) | width; | |
1417 | return snd_pcm_hw_rule_add(runtime, cond, -1, | |
1418 | snd_pcm_hw_rule_msbits, | |
1419 | (void*) l, | |
1420 | SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); | |
1421 | } | |
e88e8ae6 TI |
1422 | EXPORT_SYMBOL(snd_pcm_hw_constraint_msbits); |
1423 | ||
877211f5 TI |
1424 | static int snd_pcm_hw_rule_step(struct snd_pcm_hw_params *params, |
1425 | struct snd_pcm_hw_rule *rule) | |
1da177e4 LT |
1426 | { |
1427 | unsigned long step = (unsigned long) rule->private; | |
0f519b62 | 1428 | return snd_interval_step(hw_param_interval(params, rule->var), step); |
1da177e4 LT |
1429 | } |
1430 | ||
1431 | /** | |
1c85cc64 | 1432 | * snd_pcm_hw_constraint_step - add a hw constraint step rule |
df8db936 TI |
1433 | * @runtime: PCM runtime instance |
1434 | * @cond: condition bits | |
1435 | * @var: hw_params variable to apply the step constraint | |
1436 | * @step: step size | |
eb7c06e8 YB |
1437 | * |
1438 | * Return: Zero if successful, or a negative error code on failure. | |
1da177e4 | 1439 | */ |
877211f5 | 1440 | int snd_pcm_hw_constraint_step(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1441 | unsigned int cond, |
1442 | snd_pcm_hw_param_t var, | |
1443 | unsigned long step) | |
1444 | { | |
1445 | return snd_pcm_hw_rule_add(runtime, cond, var, | |
1446 | snd_pcm_hw_rule_step, (void *) step, | |
1447 | var, -1); | |
1448 | } | |
e88e8ae6 TI |
1449 | EXPORT_SYMBOL(snd_pcm_hw_constraint_step); |
1450 | ||
877211f5 | 1451 | static int snd_pcm_hw_rule_pow2(struct snd_pcm_hw_params *params, struct snd_pcm_hw_rule *rule) |
1da177e4 | 1452 | { |
67c39317 | 1453 | static unsigned int pow2_sizes[] = { |
1da177e4 LT |
1454 | 1<<0, 1<<1, 1<<2, 1<<3, 1<<4, 1<<5, 1<<6, 1<<7, |
1455 | 1<<8, 1<<9, 1<<10, 1<<11, 1<<12, 1<<13, 1<<14, 1<<15, | |
1456 | 1<<16, 1<<17, 1<<18, 1<<19, 1<<20, 1<<21, 1<<22, 1<<23, | |
1457 | 1<<24, 1<<25, 1<<26, 1<<27, 1<<28, 1<<29, 1<<30 | |
1458 | }; | |
1459 | return snd_interval_list(hw_param_interval(params, rule->var), | |
1460 | ARRAY_SIZE(pow2_sizes), pow2_sizes, 0); | |
1461 | } | |
1462 | ||
1463 | /** | |
1c85cc64 | 1464 | * snd_pcm_hw_constraint_pow2 - add a hw constraint power-of-2 rule |
df8db936 TI |
1465 | * @runtime: PCM runtime instance |
1466 | * @cond: condition bits | |
1467 | * @var: hw_params variable to apply the power-of-2 constraint | |
eb7c06e8 YB |
1468 | * |
1469 | * Return: Zero if successful, or a negative error code on failure. | |
1da177e4 | 1470 | */ |
877211f5 | 1471 | int snd_pcm_hw_constraint_pow2(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1472 | unsigned int cond, |
1473 | snd_pcm_hw_param_t var) | |
1474 | { | |
1475 | return snd_pcm_hw_rule_add(runtime, cond, var, | |
1476 | snd_pcm_hw_rule_pow2, NULL, | |
1477 | var, -1); | |
1478 | } | |
e88e8ae6 TI |
1479 | EXPORT_SYMBOL(snd_pcm_hw_constraint_pow2); |
1480 | ||
d5b702a6 CL |
1481 | static int snd_pcm_hw_rule_noresample_func(struct snd_pcm_hw_params *params, |
1482 | struct snd_pcm_hw_rule *rule) | |
1483 | { | |
1484 | unsigned int base_rate = (unsigned int)(uintptr_t)rule->private; | |
1485 | struct snd_interval *rate; | |
1486 | ||
1487 | rate = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE); | |
1488 | return snd_interval_list(rate, 1, &base_rate, 0); | |
1489 | } | |
1490 | ||
1491 | /** | |
1492 | * snd_pcm_hw_rule_noresample - add a rule to allow disabling hw resampling | |
1493 | * @runtime: PCM runtime instance | |
1494 | * @base_rate: the rate at which the hardware does not resample | |
eb7c06e8 YB |
1495 | * |
1496 | * Return: Zero if successful, or a negative error code on failure. | |
d5b702a6 CL |
1497 | */ |
1498 | int snd_pcm_hw_rule_noresample(struct snd_pcm_runtime *runtime, | |
1499 | unsigned int base_rate) | |
1500 | { | |
1501 | return snd_pcm_hw_rule_add(runtime, SNDRV_PCM_HW_PARAMS_NORESAMPLE, | |
1502 | SNDRV_PCM_HW_PARAM_RATE, | |
1503 | snd_pcm_hw_rule_noresample_func, | |
1504 | (void *)(uintptr_t)base_rate, | |
1505 | SNDRV_PCM_HW_PARAM_RATE, -1); | |
1506 | } | |
1507 | EXPORT_SYMBOL(snd_pcm_hw_rule_noresample); | |
1508 | ||
877211f5 | 1509 | static void _snd_pcm_hw_param_any(struct snd_pcm_hw_params *params, |
123992f7 | 1510 | snd_pcm_hw_param_t var) |
1da177e4 LT |
1511 | { |
1512 | if (hw_is_mask(var)) { | |
1513 | snd_mask_any(hw_param_mask(params, var)); | |
1514 | params->cmask |= 1 << var; | |
1515 | params->rmask |= 1 << var; | |
1516 | return; | |
1517 | } | |
1518 | if (hw_is_interval(var)) { | |
1519 | snd_interval_any(hw_param_interval(params, var)); | |
1520 | params->cmask |= 1 << var; | |
1521 | params->rmask |= 1 << var; | |
1522 | return; | |
1523 | } | |
1524 | snd_BUG(); | |
1525 | } | |
1526 | ||
877211f5 | 1527 | void _snd_pcm_hw_params_any(struct snd_pcm_hw_params *params) |
1da177e4 LT |
1528 | { |
1529 | unsigned int k; | |
1530 | memset(params, 0, sizeof(*params)); | |
1531 | for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) | |
1532 | _snd_pcm_hw_param_any(params, k); | |
1533 | for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) | |
1534 | _snd_pcm_hw_param_any(params, k); | |
1535 | params->info = ~0U; | |
1536 | } | |
e88e8ae6 | 1537 | EXPORT_SYMBOL(_snd_pcm_hw_params_any); |
1da177e4 LT |
1538 | |
1539 | /** | |
1c85cc64 | 1540 | * snd_pcm_hw_param_value - return @params field @var value |
df8db936 TI |
1541 | * @params: the hw_params instance |
1542 | * @var: parameter to retrieve | |
1c85cc64 | 1543 | * @dir: pointer to the direction (-1,0,1) or %NULL |
1da177e4 | 1544 | * |
eb7c06e8 YB |
1545 | * Return: The value for field @var if it's fixed in configuration space |
1546 | * defined by @params. -%EINVAL otherwise. | |
1da177e4 | 1547 | */ |
e88e8ae6 TI |
1548 | int snd_pcm_hw_param_value(const struct snd_pcm_hw_params *params, |
1549 | snd_pcm_hw_param_t var, int *dir) | |
1da177e4 LT |
1550 | { |
1551 | if (hw_is_mask(var)) { | |
877211f5 | 1552 | const struct snd_mask *mask = hw_param_mask_c(params, var); |
1da177e4 LT |
1553 | if (!snd_mask_single(mask)) |
1554 | return -EINVAL; | |
1555 | if (dir) | |
1556 | *dir = 0; | |
1557 | return snd_mask_value(mask); | |
1558 | } | |
1559 | if (hw_is_interval(var)) { | |
877211f5 | 1560 | const struct snd_interval *i = hw_param_interval_c(params, var); |
1da177e4 LT |
1561 | if (!snd_interval_single(i)) |
1562 | return -EINVAL; | |
1563 | if (dir) | |
1564 | *dir = i->openmin; | |
1565 | return snd_interval_value(i); | |
1566 | } | |
1da177e4 LT |
1567 | return -EINVAL; |
1568 | } | |
e88e8ae6 | 1569 | EXPORT_SYMBOL(snd_pcm_hw_param_value); |
1da177e4 | 1570 | |
877211f5 | 1571 | void _snd_pcm_hw_param_setempty(struct snd_pcm_hw_params *params, |
1da177e4 LT |
1572 | snd_pcm_hw_param_t var) |
1573 | { | |
1574 | if (hw_is_mask(var)) { | |
1575 | snd_mask_none(hw_param_mask(params, var)); | |
1576 | params->cmask |= 1 << var; | |
1577 | params->rmask |= 1 << var; | |
1578 | } else if (hw_is_interval(var)) { | |
1579 | snd_interval_none(hw_param_interval(params, var)); | |
1580 | params->cmask |= 1 << var; | |
1581 | params->rmask |= 1 << var; | |
1582 | } else { | |
1583 | snd_BUG(); | |
1584 | } | |
1585 | } | |
e88e8ae6 | 1586 | EXPORT_SYMBOL(_snd_pcm_hw_param_setempty); |
1da177e4 | 1587 | |
877211f5 | 1588 | static int _snd_pcm_hw_param_first(struct snd_pcm_hw_params *params, |
123992f7 | 1589 | snd_pcm_hw_param_t var) |
1da177e4 LT |
1590 | { |
1591 | int changed; | |
1592 | if (hw_is_mask(var)) | |
1593 | changed = snd_mask_refine_first(hw_param_mask(params, var)); | |
1594 | else if (hw_is_interval(var)) | |
1595 | changed = snd_interval_refine_first(hw_param_interval(params, var)); | |
2f4ca8e5 | 1596 | else |
1da177e4 | 1597 | return -EINVAL; |
7a0a8716 | 1598 | if (changed > 0) { |
1da177e4 LT |
1599 | params->cmask |= 1 << var; |
1600 | params->rmask |= 1 << var; | |
1601 | } | |
1602 | return changed; | |
1603 | } | |
1604 | ||
1605 | ||
1606 | /** | |
1c85cc64 | 1607 | * snd_pcm_hw_param_first - refine config space and return minimum value |
df8db936 TI |
1608 | * @pcm: PCM instance |
1609 | * @params: the hw_params instance | |
1610 | * @var: parameter to retrieve | |
1c85cc64 | 1611 | * @dir: pointer to the direction (-1,0,1) or %NULL |
1da177e4 | 1612 | * |
1c85cc64 | 1613 | * Inside configuration space defined by @params remove from @var all |
1da177e4 | 1614 | * values > minimum. Reduce configuration space accordingly. |
eb7c06e8 YB |
1615 | * |
1616 | * Return: The minimum, or a negative error code on failure. | |
1da177e4 | 1617 | */ |
e88e8ae6 TI |
1618 | int snd_pcm_hw_param_first(struct snd_pcm_substream *pcm, |
1619 | struct snd_pcm_hw_params *params, | |
1620 | snd_pcm_hw_param_t var, int *dir) | |
1da177e4 LT |
1621 | { |
1622 | int changed = _snd_pcm_hw_param_first(params, var); | |
1623 | if (changed < 0) | |
1624 | return changed; | |
1625 | if (params->rmask) { | |
1626 | int err = snd_pcm_hw_refine(pcm, params); | |
fe08f34d | 1627 | if (err < 0) |
7eaa943c | 1628 | return err; |
1da177e4 LT |
1629 | } |
1630 | return snd_pcm_hw_param_value(params, var, dir); | |
1631 | } | |
e88e8ae6 TI |
1632 | EXPORT_SYMBOL(snd_pcm_hw_param_first); |
1633 | ||
877211f5 | 1634 | static int _snd_pcm_hw_param_last(struct snd_pcm_hw_params *params, |
123992f7 | 1635 | snd_pcm_hw_param_t var) |
1da177e4 LT |
1636 | { |
1637 | int changed; | |
1638 | if (hw_is_mask(var)) | |
1639 | changed = snd_mask_refine_last(hw_param_mask(params, var)); | |
1640 | else if (hw_is_interval(var)) | |
1641 | changed = snd_interval_refine_last(hw_param_interval(params, var)); | |
2f4ca8e5 | 1642 | else |
1da177e4 | 1643 | return -EINVAL; |
7a0a8716 | 1644 | if (changed > 0) { |
1da177e4 LT |
1645 | params->cmask |= 1 << var; |
1646 | params->rmask |= 1 << var; | |
1647 | } | |
1648 | return changed; | |
1649 | } | |
1650 | ||
1651 | ||
1652 | /** | |
1c85cc64 | 1653 | * snd_pcm_hw_param_last - refine config space and return maximum value |
df8db936 TI |
1654 | * @pcm: PCM instance |
1655 | * @params: the hw_params instance | |
1656 | * @var: parameter to retrieve | |
1c85cc64 | 1657 | * @dir: pointer to the direction (-1,0,1) or %NULL |
1da177e4 | 1658 | * |
1c85cc64 | 1659 | * Inside configuration space defined by @params remove from @var all |
1da177e4 | 1660 | * values < maximum. Reduce configuration space accordingly. |
eb7c06e8 YB |
1661 | * |
1662 | * Return: The maximum, or a negative error code on failure. | |
1da177e4 | 1663 | */ |
e88e8ae6 TI |
1664 | int snd_pcm_hw_param_last(struct snd_pcm_substream *pcm, |
1665 | struct snd_pcm_hw_params *params, | |
1666 | snd_pcm_hw_param_t var, int *dir) | |
1da177e4 LT |
1667 | { |
1668 | int changed = _snd_pcm_hw_param_last(params, var); | |
1669 | if (changed < 0) | |
1670 | return changed; | |
1671 | if (params->rmask) { | |
1672 | int err = snd_pcm_hw_refine(pcm, params); | |
fe08f34d | 1673 | if (err < 0) |
7eaa943c | 1674 | return err; |
1da177e4 LT |
1675 | } |
1676 | return snd_pcm_hw_param_value(params, var, dir); | |
1677 | } | |
e88e8ae6 | 1678 | EXPORT_SYMBOL(snd_pcm_hw_param_last); |
1da177e4 | 1679 | |
877211f5 | 1680 | static int snd_pcm_lib_ioctl_reset(struct snd_pcm_substream *substream, |
1da177e4 LT |
1681 | void *arg) |
1682 | { | |
877211f5 | 1683 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1684 | unsigned long flags; |
1685 | snd_pcm_stream_lock_irqsave(substream, flags); | |
1686 | if (snd_pcm_running(substream) && | |
1687 | snd_pcm_update_hw_ptr(substream) >= 0) | |
1688 | runtime->status->hw_ptr %= runtime->buffer_size; | |
0e8014d7 | 1689 | else { |
1da177e4 | 1690 | runtime->status->hw_ptr = 0; |
0e8014d7 PLB |
1691 | runtime->hw_ptr_wrap = 0; |
1692 | } | |
1da177e4 LT |
1693 | snd_pcm_stream_unlock_irqrestore(substream, flags); |
1694 | return 0; | |
1695 | } | |
1696 | ||
877211f5 | 1697 | static int snd_pcm_lib_ioctl_channel_info(struct snd_pcm_substream *substream, |
1da177e4 LT |
1698 | void *arg) |
1699 | { | |
877211f5 TI |
1700 | struct snd_pcm_channel_info *info = arg; |
1701 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1da177e4 LT |
1702 | int width; |
1703 | if (!(runtime->info & SNDRV_PCM_INFO_MMAP)) { | |
1704 | info->offset = -1; | |
1705 | return 0; | |
1706 | } | |
1707 | width = snd_pcm_format_physical_width(runtime->format); | |
1708 | if (width < 0) | |
1709 | return width; | |
1710 | info->offset = 0; | |
1711 | switch (runtime->access) { | |
1712 | case SNDRV_PCM_ACCESS_MMAP_INTERLEAVED: | |
1713 | case SNDRV_PCM_ACCESS_RW_INTERLEAVED: | |
1714 | info->first = info->channel * width; | |
1715 | info->step = runtime->channels * width; | |
1716 | break; | |
1717 | case SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED: | |
1718 | case SNDRV_PCM_ACCESS_RW_NONINTERLEAVED: | |
1719 | { | |
1720 | size_t size = runtime->dma_bytes / runtime->channels; | |
1721 | info->first = info->channel * size * 8; | |
1722 | info->step = width; | |
1723 | break; | |
1724 | } | |
1725 | default: | |
1726 | snd_BUG(); | |
1727 | break; | |
1728 | } | |
1729 | return 0; | |
1730 | } | |
1731 | ||
8bea869c JK |
1732 | static int snd_pcm_lib_ioctl_fifo_size(struct snd_pcm_substream *substream, |
1733 | void *arg) | |
1734 | { | |
1735 | struct snd_pcm_hw_params *params = arg; | |
1736 | snd_pcm_format_t format; | |
a9960e6a CL |
1737 | int channels; |
1738 | ssize_t frame_size; | |
8bea869c JK |
1739 | |
1740 | params->fifo_size = substream->runtime->hw.fifo_size; | |
1741 | if (!(substream->runtime->hw.info & SNDRV_PCM_INFO_FIFO_IN_FRAMES)) { | |
1742 | format = params_format(params); | |
1743 | channels = params_channels(params); | |
a9960e6a CL |
1744 | frame_size = snd_pcm_format_size(format, channels); |
1745 | if (frame_size > 0) | |
1746 | params->fifo_size /= (unsigned)frame_size; | |
8bea869c JK |
1747 | } |
1748 | return 0; | |
1749 | } | |
1750 | ||
1da177e4 LT |
1751 | /** |
1752 | * snd_pcm_lib_ioctl - a generic PCM ioctl callback | |
1753 | * @substream: the pcm substream instance | |
1754 | * @cmd: ioctl command | |
1755 | * @arg: ioctl argument | |
1756 | * | |
1757 | * Processes the generic ioctl commands for PCM. | |
1758 | * Can be passed as the ioctl callback for PCM ops. | |
1759 | * | |
eb7c06e8 | 1760 | * Return: Zero if successful, or a negative error code on failure. |
1da177e4 | 1761 | */ |
877211f5 | 1762 | int snd_pcm_lib_ioctl(struct snd_pcm_substream *substream, |
1da177e4 LT |
1763 | unsigned int cmd, void *arg) |
1764 | { | |
1765 | switch (cmd) { | |
1da177e4 LT |
1766 | case SNDRV_PCM_IOCTL1_RESET: |
1767 | return snd_pcm_lib_ioctl_reset(substream, arg); | |
1768 | case SNDRV_PCM_IOCTL1_CHANNEL_INFO: | |
1769 | return snd_pcm_lib_ioctl_channel_info(substream, arg); | |
8bea869c JK |
1770 | case SNDRV_PCM_IOCTL1_FIFO_SIZE: |
1771 | return snd_pcm_lib_ioctl_fifo_size(substream, arg); | |
1da177e4 LT |
1772 | } |
1773 | return -ENXIO; | |
1774 | } | |
e88e8ae6 TI |
1775 | EXPORT_SYMBOL(snd_pcm_lib_ioctl); |
1776 | ||
1da177e4 LT |
1777 | /** |
1778 | * snd_pcm_period_elapsed - update the pcm status for the next period | |
1779 | * @substream: the pcm substream instance | |
1780 | * | |
1781 | * This function is called from the interrupt handler when the | |
1782 | * PCM has processed the period size. It will update the current | |
31e8960b | 1783 | * pointer, wake up sleepers, etc. |
1da177e4 LT |
1784 | * |
1785 | * Even if more than one periods have elapsed since the last call, you | |
1786 | * have to call this only once. | |
1787 | */ | |
877211f5 | 1788 | void snd_pcm_period_elapsed(struct snd_pcm_substream *substream) |
1da177e4 | 1789 | { |
877211f5 | 1790 | struct snd_pcm_runtime *runtime; |
1da177e4 LT |
1791 | unsigned long flags; |
1792 | ||
7eaa943c TI |
1793 | if (PCM_RUNTIME_CHECK(substream)) |
1794 | return; | |
1da177e4 | 1795 | runtime = substream->runtime; |
1da177e4 | 1796 | |
1da177e4 LT |
1797 | snd_pcm_stream_lock_irqsave(substream, flags); |
1798 | if (!snd_pcm_running(substream) || | |
f240406b | 1799 | snd_pcm_update_hw_ptr0(substream, 1) < 0) |
1da177e4 LT |
1800 | goto _end; |
1801 | ||
90bbaf66 | 1802 | #ifdef CONFIG_SND_PCM_TIMER |
1da177e4 LT |
1803 | if (substream->timer_running) |
1804 | snd_timer_interrupt(substream->timer, 1); | |
90bbaf66 | 1805 | #endif |
1da177e4 | 1806 | _end: |
1da177e4 | 1807 | kill_fasync(&runtime->fasync, SIGIO, POLL_IN); |
3aa02cb6 | 1808 | snd_pcm_stream_unlock_irqrestore(substream, flags); |
1da177e4 | 1809 | } |
e88e8ae6 TI |
1810 | EXPORT_SYMBOL(snd_pcm_period_elapsed); |
1811 | ||
13075510 TI |
1812 | /* |
1813 | * Wait until avail_min data becomes available | |
1814 | * Returns a negative error code if any error occurs during operation. | |
1815 | * The available space is stored on availp. When err = 0 and avail = 0 | |
1816 | * on the capture stream, it indicates the stream is in DRAINING state. | |
1817 | */ | |
5daeba34 | 1818 | static int wait_for_avail(struct snd_pcm_substream *substream, |
13075510 TI |
1819 | snd_pcm_uframes_t *availp) |
1820 | { | |
1821 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1822 | int is_playback = substream->stream == SNDRV_PCM_STREAM_PLAYBACK; | |
ac6424b9 | 1823 | wait_queue_entry_t wait; |
13075510 TI |
1824 | int err = 0; |
1825 | snd_pcm_uframes_t avail = 0; | |
f2b3614c TI |
1826 | long wait_time, tout; |
1827 | ||
763437a9 AV |
1828 | init_waitqueue_entry(&wait, current); |
1829 | set_current_state(TASK_INTERRUPTIBLE); | |
1830 | add_wait_queue(&runtime->tsleep, &wait); | |
1831 | ||
f2b3614c TI |
1832 | if (runtime->no_period_wakeup) |
1833 | wait_time = MAX_SCHEDULE_TIMEOUT; | |
1834 | else { | |
1835 | wait_time = 10; | |
1836 | if (runtime->rate) { | |
1837 | long t = runtime->period_size * 2 / runtime->rate; | |
1838 | wait_time = max(t, wait_time); | |
1839 | } | |
1840 | wait_time = msecs_to_jiffies(wait_time * 1000); | |
1841 | } | |
763437a9 | 1842 | |
13075510 TI |
1843 | for (;;) { |
1844 | if (signal_pending(current)) { | |
1845 | err = -ERESTARTSYS; | |
1846 | break; | |
1847 | } | |
763437a9 AV |
1848 | |
1849 | /* | |
1850 | * We need to check if space became available already | |
1851 | * (and thus the wakeup happened already) first to close | |
1852 | * the race of space already having become available. | |
1853 | * This check must happen after been added to the waitqueue | |
1854 | * and having current state be INTERRUPTIBLE. | |
1855 | */ | |
763e5067 | 1856 | avail = snd_pcm_avail(substream); |
763437a9 AV |
1857 | if (avail >= runtime->twake) |
1858 | break; | |
13075510 | 1859 | snd_pcm_stream_unlock_irq(substream); |
763437a9 AV |
1860 | |
1861 | tout = schedule_timeout(wait_time); | |
1862 | ||
13075510 | 1863 | snd_pcm_stream_lock_irq(substream); |
763437a9 | 1864 | set_current_state(TASK_INTERRUPTIBLE); |
13075510 TI |
1865 | switch (runtime->status->state) { |
1866 | case SNDRV_PCM_STATE_SUSPENDED: | |
1867 | err = -ESTRPIPE; | |
1868 | goto _endloop; | |
1869 | case SNDRV_PCM_STATE_XRUN: | |
1870 | err = -EPIPE; | |
1871 | goto _endloop; | |
1872 | case SNDRV_PCM_STATE_DRAINING: | |
1873 | if (is_playback) | |
1874 | err = -EPIPE; | |
1875 | else | |
1876 | avail = 0; /* indicate draining */ | |
1877 | goto _endloop; | |
1878 | case SNDRV_PCM_STATE_OPEN: | |
1879 | case SNDRV_PCM_STATE_SETUP: | |
1880 | case SNDRV_PCM_STATE_DISCONNECTED: | |
1881 | err = -EBADFD; | |
1882 | goto _endloop; | |
ed697e1a JK |
1883 | case SNDRV_PCM_STATE_PAUSED: |
1884 | continue; | |
13075510 TI |
1885 | } |
1886 | if (!tout) { | |
09e56df8 TI |
1887 | pcm_dbg(substream->pcm, |
1888 | "%s write error (DMA or IRQ trouble?)\n", | |
1889 | is_playback ? "playback" : "capture"); | |
13075510 TI |
1890 | err = -EIO; |
1891 | break; | |
1892 | } | |
13075510 TI |
1893 | } |
1894 | _endloop: | |
763437a9 | 1895 | set_current_state(TASK_RUNNING); |
c91a988d | 1896 | remove_wait_queue(&runtime->tsleep, &wait); |
13075510 TI |
1897 | *availp = avail; |
1898 | return err; | |
1899 | } | |
1900 | ||
9f600630 TI |
1901 | typedef int (*pcm_transfer_f)(struct snd_pcm_substream *substream, |
1902 | int channel, unsigned long hwoff, | |
1903 | void *buf, unsigned long bytes); | |
bdc4acf7 | 1904 | |
9f600630 TI |
1905 | typedef int (*pcm_copy_f)(struct snd_pcm_substream *, snd_pcm_uframes_t, void *, |
1906 | snd_pcm_uframes_t, snd_pcm_uframes_t, pcm_transfer_f); | |
1907 | ||
1908 | /* calculate the target DMA-buffer position to be written/read */ | |
1909 | static void *get_dma_ptr(struct snd_pcm_runtime *runtime, | |
1910 | int channel, unsigned long hwoff) | |
1da177e4 | 1911 | { |
9f600630 TI |
1912 | return runtime->dma_area + hwoff + |
1913 | channel * (runtime->dma_bytes / runtime->channels); | |
1914 | } | |
1915 | ||
5c7264cf TI |
1916 | /* default copy_user ops for write; used for both interleaved and non- modes */ |
1917 | static int default_write_copy(struct snd_pcm_substream *substream, | |
1918 | int channel, unsigned long hwoff, | |
1919 | void *buf, unsigned long bytes) | |
9f600630 TI |
1920 | { |
1921 | if (copy_from_user(get_dma_ptr(substream->runtime, channel, hwoff), | |
5c7264cf | 1922 | (void __user *)buf, bytes)) |
9f600630 TI |
1923 | return -EFAULT; |
1924 | return 0; | |
1925 | } | |
1926 | ||
68541213 TI |
1927 | /* default copy_kernel ops for write */ |
1928 | static int default_write_copy_kernel(struct snd_pcm_substream *substream, | |
1929 | int channel, unsigned long hwoff, | |
1930 | void *buf, unsigned long bytes) | |
1931 | { | |
1932 | memcpy(get_dma_ptr(substream->runtime, channel, hwoff), buf, bytes); | |
1da177e4 LT |
1933 | return 0; |
1934 | } | |
1da177e4 | 1935 | |
9f600630 TI |
1936 | /* fill silence instead of copy data; called as a transfer helper |
1937 | * from __snd_pcm_lib_write() or directly from noninterleaved_copy() when | |
1938 | * a NULL buffer is passed | |
1939 | */ | |
1940 | static int fill_silence(struct snd_pcm_substream *substream, int channel, | |
1941 | unsigned long hwoff, void *buf, unsigned long bytes) | |
1da177e4 | 1942 | { |
877211f5 | 1943 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 | 1944 | |
9f600630 | 1945 | if (substream->stream != SNDRV_PCM_STREAM_PLAYBACK) |
1da177e4 | 1946 | return 0; |
9f600630 TI |
1947 | if (substream->ops->fill_silence) |
1948 | return substream->ops->fill_silence(substream, channel, | |
1949 | hwoff, bytes); | |
1da177e4 | 1950 | |
9f600630 TI |
1951 | snd_pcm_format_set_silence(runtime->format, |
1952 | get_dma_ptr(runtime, channel, hwoff), | |
1953 | bytes_to_samples(runtime, bytes)); | |
1da177e4 LT |
1954 | return 0; |
1955 | } | |
1da177e4 | 1956 | |
5c7264cf TI |
1957 | /* default copy_user ops for read; used for both interleaved and non- modes */ |
1958 | static int default_read_copy(struct snd_pcm_substream *substream, | |
1959 | int channel, unsigned long hwoff, | |
1960 | void *buf, unsigned long bytes) | |
1961 | { | |
1962 | if (copy_to_user((void __user *)buf, | |
1963 | get_dma_ptr(substream->runtime, channel, hwoff), | |
1964 | bytes)) | |
1965 | return -EFAULT; | |
1966 | return 0; | |
1967 | } | |
1da177e4 | 1968 | |
68541213 TI |
1969 | /* default copy_kernel ops for read */ |
1970 | static int default_read_copy_kernel(struct snd_pcm_substream *substream, | |
1971 | int channel, unsigned long hwoff, | |
1972 | void *buf, unsigned long bytes) | |
1973 | { | |
1974 | memcpy(buf, get_dma_ptr(substream->runtime, channel, hwoff), bytes); | |
1975 | return 0; | |
1976 | } | |
1977 | ||
9f600630 TI |
1978 | /* call transfer function with the converted pointers and sizes; |
1979 | * for interleaved mode, it's one shot for all samples | |
1980 | */ | |
1981 | static int interleaved_copy(struct snd_pcm_substream *substream, | |
1982 | snd_pcm_uframes_t hwoff, void *data, | |
1983 | snd_pcm_uframes_t off, | |
1984 | snd_pcm_uframes_t frames, | |
1985 | pcm_transfer_f transfer) | |
1986 | { | |
1987 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1988 | ||
1989 | /* convert to bytes */ | |
1990 | hwoff = frames_to_bytes(runtime, hwoff); | |
1991 | off = frames_to_bytes(runtime, off); | |
1992 | frames = frames_to_bytes(runtime, frames); | |
1993 | return transfer(substream, 0, hwoff, data + off, frames); | |
1994 | } | |
1995 | ||
1996 | /* call transfer function with the converted pointers and sizes for each | |
1997 | * non-interleaved channel; when buffer is NULL, silencing instead of copying | |
1998 | */ | |
1999 | static int noninterleaved_copy(struct snd_pcm_substream *substream, | |
2000 | snd_pcm_uframes_t hwoff, void *data, | |
2001 | snd_pcm_uframes_t off, | |
2002 | snd_pcm_uframes_t frames, | |
2003 | pcm_transfer_f transfer) | |
bdc4acf7 TI |
2004 | { |
2005 | struct snd_pcm_runtime *runtime = substream->runtime; | |
bdc4acf7 | 2006 | int channels = runtime->channels; |
9f600630 TI |
2007 | void **bufs = data; |
2008 | int c, err; | |
2009 | ||
2010 | /* convert to bytes; note that it's not frames_to_bytes() here. | |
2011 | * in non-interleaved mode, we copy for each channel, thus | |
2012 | * each copy is n_samples bytes x channels = whole frames. | |
2013 | */ | |
2014 | off = samples_to_bytes(runtime, off); | |
2015 | frames = samples_to_bytes(runtime, frames); | |
2016 | hwoff = samples_to_bytes(runtime, hwoff); | |
2017 | for (c = 0; c < channels; ++c, ++bufs) { | |
2018 | if (!data || !*bufs) | |
2019 | err = fill_silence(substream, c, hwoff, NULL, frames); | |
2020 | else | |
2021 | err = transfer(substream, c, hwoff, *bufs + off, | |
2022 | frames); | |
2023 | if (err < 0) | |
2024 | return err; | |
1da177e4 | 2025 | } |
bdc4acf7 TI |
2026 | return 0; |
2027 | } | |
2028 | ||
a9cd29e7 TI |
2029 | /* fill silence on the given buffer position; |
2030 | * called from snd_pcm_playback_silence() | |
2031 | */ | |
2032 | static int fill_silence_frames(struct snd_pcm_substream *substream, | |
2033 | snd_pcm_uframes_t off, snd_pcm_uframes_t frames) | |
2034 | { | |
2035 | if (substream->runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED || | |
2036 | substream->runtime->access == SNDRV_PCM_ACCESS_MMAP_INTERLEAVED) | |
2037 | return interleaved_copy(substream, off, NULL, 0, frames, | |
2038 | fill_silence); | |
2039 | else | |
2040 | return noninterleaved_copy(substream, off, NULL, 0, frames, | |
2041 | fill_silence); | |
1da177e4 LT |
2042 | } |
2043 | ||
7eaa943c TI |
2044 | /* sanity-check for read/write methods */ |
2045 | static int pcm_sanity_check(struct snd_pcm_substream *substream) | |
1da177e4 | 2046 | { |
877211f5 | 2047 | struct snd_pcm_runtime *runtime; |
7eaa943c TI |
2048 | if (PCM_RUNTIME_CHECK(substream)) |
2049 | return -ENXIO; | |
1da177e4 | 2050 | runtime = substream->runtime; |
bdc4acf7 | 2051 | if (snd_BUG_ON(!substream->ops->copy_user && !runtime->dma_area)) |
7eaa943c | 2052 | return -EINVAL; |
1da177e4 LT |
2053 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) |
2054 | return -EBADFD; | |
7eaa943c TI |
2055 | return 0; |
2056 | } | |
2057 | ||
6ba63929 | 2058 | static int pcm_accessible_state(struct snd_pcm_runtime *runtime) |
7eaa943c | 2059 | { |
6ba63929 TI |
2060 | switch (runtime->status->state) { |
2061 | case SNDRV_PCM_STATE_PREPARED: | |
2062 | case SNDRV_PCM_STATE_RUNNING: | |
2063 | case SNDRV_PCM_STATE_PAUSED: | |
2064 | return 0; | |
2065 | case SNDRV_PCM_STATE_XRUN: | |
2066 | return -EPIPE; | |
2067 | case SNDRV_PCM_STATE_SUSPENDED: | |
2068 | return -ESTRPIPE; | |
2069 | default: | |
2070 | return -EBADFD; | |
2071 | } | |
1da177e4 LT |
2072 | } |
2073 | ||
66e01a5c TS |
2074 | /* update to the given appl_ptr and call ack callback if needed; |
2075 | * when an error is returned, take back to the original value | |
2076 | */ | |
2077 | int pcm_lib_apply_appl_ptr(struct snd_pcm_substream *substream, | |
2078 | snd_pcm_uframes_t appl_ptr) | |
1da177e4 | 2079 | { |
877211f5 | 2080 | struct snd_pcm_runtime *runtime = substream->runtime; |
66e01a5c TS |
2081 | snd_pcm_uframes_t old_appl_ptr = runtime->control->appl_ptr; |
2082 | int ret; | |
2083 | ||
f8ff2f28 TI |
2084 | if (old_appl_ptr == appl_ptr) |
2085 | return 0; | |
2086 | ||
66e01a5c TS |
2087 | runtime->control->appl_ptr = appl_ptr; |
2088 | if (substream->ops->ack) { | |
2089 | ret = substream->ops->ack(substream); | |
2090 | if (ret < 0) { | |
2091 | runtime->control->appl_ptr = old_appl_ptr; | |
2092 | return ret; | |
1da177e4 LT |
2093 | } |
2094 | } | |
fccf5388 TS |
2095 | |
2096 | trace_applptr(substream, old_appl_ptr, appl_ptr); | |
2097 | ||
1da177e4 LT |
2098 | return 0; |
2099 | } | |
66e01a5c | 2100 | |
5c7264cf TI |
2101 | /* the common loop for read/write data */ |
2102 | snd_pcm_sframes_t __snd_pcm_lib_xfer(struct snd_pcm_substream *substream, | |
2103 | void *data, bool interleaved, | |
68541213 | 2104 | snd_pcm_uframes_t size, bool in_kernel) |
1da177e4 | 2105 | { |
877211f5 | 2106 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
2107 | snd_pcm_uframes_t xfer = 0; |
2108 | snd_pcm_uframes_t offset = 0; | |
0910c216 | 2109 | snd_pcm_uframes_t avail; |
9f600630 TI |
2110 | pcm_copy_f writer; |
2111 | pcm_transfer_f transfer; | |
c48f12ee | 2112 | bool nonblock; |
5c7264cf | 2113 | bool is_playback; |
7eaa943c | 2114 | int err; |
1da177e4 | 2115 | |
7eaa943c TI |
2116 | err = pcm_sanity_check(substream); |
2117 | if (err < 0) | |
2118 | return err; | |
e88e8ae6 | 2119 | |
5c7264cf | 2120 | is_playback = substream->stream == SNDRV_PCM_STREAM_PLAYBACK; |
c48f12ee TI |
2121 | if (interleaved) { |
2122 | if (runtime->access != SNDRV_PCM_ACCESS_RW_INTERLEAVED && | |
2123 | runtime->channels > 1) | |
2124 | return -EINVAL; | |
9f600630 | 2125 | writer = interleaved_copy; |
1da177e4 | 2126 | } else { |
c48f12ee TI |
2127 | if (runtime->access != SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) |
2128 | return -EINVAL; | |
9f600630 | 2129 | writer = noninterleaved_copy; |
1da177e4 | 2130 | } |
1da177e4 | 2131 | |
9f600630 | 2132 | if (!data) { |
5c7264cf TI |
2133 | if (is_playback) |
2134 | transfer = fill_silence; | |
2135 | else | |
2136 | return -EINVAL; | |
68541213 TI |
2137 | } else if (in_kernel) { |
2138 | if (substream->ops->copy_kernel) | |
2139 | transfer = substream->ops->copy_kernel; | |
2140 | else | |
2141 | transfer = is_playback ? | |
2142 | default_write_copy_kernel : default_read_copy_kernel; | |
9f600630 TI |
2143 | } else { |
2144 | if (substream->ops->copy_user) | |
2145 | transfer = (pcm_transfer_f)substream->ops->copy_user; | |
2146 | else | |
5c7264cf TI |
2147 | transfer = is_playback ? |
2148 | default_write_copy : default_read_copy; | |
c48f12ee | 2149 | } |
1da177e4 LT |
2150 | |
2151 | if (size == 0) | |
2152 | return 0; | |
1da177e4 | 2153 | |
c48f12ee TI |
2154 | nonblock = !!(substream->f_flags & O_NONBLOCK); |
2155 | ||
1da177e4 | 2156 | snd_pcm_stream_lock_irq(substream); |
6ba63929 TI |
2157 | err = pcm_accessible_state(runtime); |
2158 | if (err < 0) | |
1da177e4 | 2159 | goto _end_unlock; |
1da177e4 | 2160 | |
5c7264cf TI |
2161 | if (!is_playback && |
2162 | runtime->status->state == SNDRV_PCM_STATE_PREPARED && | |
6ba63929 TI |
2163 | size >= runtime->start_threshold) { |
2164 | err = snd_pcm_start(substream); | |
2165 | if (err < 0) | |
2166 | goto _end_unlock; | |
1da177e4 LT |
2167 | } |
2168 | ||
5daeba34 | 2169 | runtime->twake = runtime->control->avail_min ? : 1; |
0910c216 TI |
2170 | if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) |
2171 | snd_pcm_update_hw_ptr(substream); | |
763e5067 | 2172 | avail = snd_pcm_avail(substream); |
1da177e4 LT |
2173 | while (size > 0) { |
2174 | snd_pcm_uframes_t frames, appl_ptr, appl_ofs; | |
1da177e4 | 2175 | snd_pcm_uframes_t cont; |
13075510 | 2176 | if (!avail) { |
5c7264cf TI |
2177 | if (!is_playback && |
2178 | runtime->status->state == SNDRV_PCM_STATE_DRAINING) { | |
13075510 | 2179 | snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP); |
1da177e4 LT |
2180 | goto _end_unlock; |
2181 | } | |
1da177e4 LT |
2182 | if (nonblock) { |
2183 | err = -EAGAIN; | |
2184 | goto _end_unlock; | |
2185 | } | |
5daeba34 DD |
2186 | runtime->twake = min_t(snd_pcm_uframes_t, size, |
2187 | runtime->control->avail_min ? : 1); | |
2188 | err = wait_for_avail(substream, &avail); | |
13075510 | 2189 | if (err < 0) |
443feb88 | 2190 | goto _end_unlock; |
13075510 TI |
2191 | if (!avail) |
2192 | continue; /* draining */ | |
1da177e4 | 2193 | } |
1da177e4 | 2194 | frames = size > avail ? avail : size; |
aa30db06 TI |
2195 | appl_ptr = READ_ONCE(runtime->control->appl_ptr); |
2196 | appl_ofs = appl_ptr % runtime->buffer_size; | |
2197 | cont = runtime->buffer_size - appl_ofs; | |
1da177e4 LT |
2198 | if (frames > cont) |
2199 | frames = cont; | |
7eaa943c | 2200 | if (snd_BUG_ON(!frames)) { |
c91a988d | 2201 | runtime->twake = 0; |
7eaa943c TI |
2202 | snd_pcm_stream_unlock_irq(substream); |
2203 | return -EINVAL; | |
2204 | } | |
1da177e4 | 2205 | snd_pcm_stream_unlock_irq(substream); |
5c7264cf | 2206 | err = writer(substream, appl_ofs, data, offset, frames, |
9f600630 | 2207 | transfer); |
1da177e4 | 2208 | snd_pcm_stream_lock_irq(substream); |
1250932e JK |
2209 | if (err < 0) |
2210 | goto _end_unlock; | |
6ba63929 TI |
2211 | err = pcm_accessible_state(runtime); |
2212 | if (err < 0) | |
1da177e4 | 2213 | goto _end_unlock; |
1da177e4 LT |
2214 | appl_ptr += frames; |
2215 | if (appl_ptr >= runtime->boundary) | |
2216 | appl_ptr -= runtime->boundary; | |
66e01a5c TS |
2217 | err = pcm_lib_apply_appl_ptr(substream, appl_ptr); |
2218 | if (err < 0) | |
2219 | goto _end_unlock; | |
1da177e4 LT |
2220 | |
2221 | offset += frames; | |
2222 | size -= frames; | |
2223 | xfer += frames; | |
0910c216 | 2224 | avail -= frames; |
5c7264cf TI |
2225 | if (is_playback && |
2226 | runtime->status->state == SNDRV_PCM_STATE_PREPARED && | |
2227 | snd_pcm_playback_hw_avail(runtime) >= (snd_pcm_sframes_t)runtime->start_threshold) { | |
2228 | err = snd_pcm_start(substream); | |
2229 | if (err < 0) | |
2230 | goto _end_unlock; | |
2231 | } | |
1da177e4 LT |
2232 | } |
2233 | _end_unlock: | |
c91a988d | 2234 | runtime->twake = 0; |
1250932e JK |
2235 | if (xfer > 0 && err >= 0) |
2236 | snd_pcm_update_state(substream, runtime); | |
1da177e4 | 2237 | snd_pcm_stream_unlock_irq(substream); |
1da177e4 LT |
2238 | return xfer > 0 ? (snd_pcm_sframes_t)xfer : err; |
2239 | } | |
5c7264cf | 2240 | EXPORT_SYMBOL(__snd_pcm_lib_xfer); |
2d3391ec TI |
2241 | |
2242 | /* | |
2243 | * standard channel mapping helpers | |
2244 | */ | |
2245 | ||
2246 | /* default channel maps for multi-channel playbacks, up to 8 channels */ | |
2247 | const struct snd_pcm_chmap_elem snd_pcm_std_chmaps[] = { | |
2248 | { .channels = 1, | |
5efbc261 | 2249 | .map = { SNDRV_CHMAP_MONO } }, |
2d3391ec TI |
2250 | { .channels = 2, |
2251 | .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR } }, | |
2252 | { .channels = 4, | |
2253 | .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, | |
2254 | SNDRV_CHMAP_RL, SNDRV_CHMAP_RR } }, | |
2255 | { .channels = 6, | |
2256 | .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, | |
2257 | SNDRV_CHMAP_RL, SNDRV_CHMAP_RR, | |
2258 | SNDRV_CHMAP_FC, SNDRV_CHMAP_LFE } }, | |
2259 | { .channels = 8, | |
2260 | .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, | |
2261 | SNDRV_CHMAP_RL, SNDRV_CHMAP_RR, | |
2262 | SNDRV_CHMAP_FC, SNDRV_CHMAP_LFE, | |
2263 | SNDRV_CHMAP_SL, SNDRV_CHMAP_SR } }, | |
2264 | { } | |
2265 | }; | |
2266 | EXPORT_SYMBOL_GPL(snd_pcm_std_chmaps); | |
2267 | ||
2268 | /* alternative channel maps with CLFE <-> surround swapped for 6/8 channels */ | |
2269 | const struct snd_pcm_chmap_elem snd_pcm_alt_chmaps[] = { | |
2270 | { .channels = 1, | |
5efbc261 | 2271 | .map = { SNDRV_CHMAP_MONO } }, |
2d3391ec TI |
2272 | { .channels = 2, |
2273 | .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR } }, | |
2274 | { .channels = 4, | |
2275 | .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, | |
2276 | SNDRV_CHMAP_RL, SNDRV_CHMAP_RR } }, | |
2277 | { .channels = 6, | |
2278 | .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, | |
2279 | SNDRV_CHMAP_FC, SNDRV_CHMAP_LFE, | |
2280 | SNDRV_CHMAP_RL, SNDRV_CHMAP_RR } }, | |
2281 | { .channels = 8, | |
2282 | .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, | |
2283 | SNDRV_CHMAP_FC, SNDRV_CHMAP_LFE, | |
2284 | SNDRV_CHMAP_RL, SNDRV_CHMAP_RR, | |
2285 | SNDRV_CHMAP_SL, SNDRV_CHMAP_SR } }, | |
2286 | { } | |
2287 | }; | |
2288 | EXPORT_SYMBOL_GPL(snd_pcm_alt_chmaps); | |
2289 | ||
2290 | static bool valid_chmap_channels(const struct snd_pcm_chmap *info, int ch) | |
2291 | { | |
2292 | if (ch > info->max_channels) | |
2293 | return false; | |
2294 | return !info->channel_mask || (info->channel_mask & (1U << ch)); | |
2295 | } | |
2296 | ||
2297 | static int pcm_chmap_ctl_info(struct snd_kcontrol *kcontrol, | |
2298 | struct snd_ctl_elem_info *uinfo) | |
2299 | { | |
2300 | struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol); | |
2301 | ||
2302 | uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; | |
2303 | uinfo->count = 0; | |
2304 | uinfo->count = info->max_channels; | |
2305 | uinfo->value.integer.min = 0; | |
2306 | uinfo->value.integer.max = SNDRV_CHMAP_LAST; | |
2307 | return 0; | |
2308 | } | |
2309 | ||
2310 | /* get callback for channel map ctl element | |
2311 | * stores the channel position firstly matching with the current channels | |
2312 | */ | |
2313 | static int pcm_chmap_ctl_get(struct snd_kcontrol *kcontrol, | |
2314 | struct snd_ctl_elem_value *ucontrol) | |
2315 | { | |
2316 | struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol); | |
2317 | unsigned int idx = snd_ctl_get_ioffidx(kcontrol, &ucontrol->id); | |
2318 | struct snd_pcm_substream *substream; | |
2319 | const struct snd_pcm_chmap_elem *map; | |
2320 | ||
2deaeaf1 | 2321 | if (!info->chmap) |
2d3391ec TI |
2322 | return -EINVAL; |
2323 | substream = snd_pcm_chmap_substream(info, idx); | |
2324 | if (!substream) | |
2325 | return -ENODEV; | |
2326 | memset(ucontrol->value.integer.value, 0, | |
2327 | sizeof(ucontrol->value.integer.value)); | |
2328 | if (!substream->runtime) | |
2329 | return 0; /* no channels set */ | |
2330 | for (map = info->chmap; map->channels; map++) { | |
2331 | int i; | |
2332 | if (map->channels == substream->runtime->channels && | |
2333 | valid_chmap_channels(info, map->channels)) { | |
2334 | for (i = 0; i < map->channels; i++) | |
2335 | ucontrol->value.integer.value[i] = map->map[i]; | |
2336 | return 0; | |
2337 | } | |
2338 | } | |
2339 | return -EINVAL; | |
2340 | } | |
2341 | ||
2342 | /* tlv callback for channel map ctl element | |
2343 | * expands the pre-defined channel maps in a form of TLV | |
2344 | */ | |
2345 | static int pcm_chmap_ctl_tlv(struct snd_kcontrol *kcontrol, int op_flag, | |
2346 | unsigned int size, unsigned int __user *tlv) | |
2347 | { | |
2348 | struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol); | |
2349 | const struct snd_pcm_chmap_elem *map; | |
2350 | unsigned int __user *dst; | |
2351 | int c, count = 0; | |
2352 | ||
2deaeaf1 | 2353 | if (!info->chmap) |
2d3391ec TI |
2354 | return -EINVAL; |
2355 | if (size < 8) | |
2356 | return -ENOMEM; | |
2357 | if (put_user(SNDRV_CTL_TLVT_CONTAINER, tlv)) | |
2358 | return -EFAULT; | |
2359 | size -= 8; | |
2360 | dst = tlv + 2; | |
2361 | for (map = info->chmap; map->channels; map++) { | |
2362 | int chs_bytes = map->channels * 4; | |
2363 | if (!valid_chmap_channels(info, map->channels)) | |
2364 | continue; | |
2365 | if (size < 8) | |
2366 | return -ENOMEM; | |
2367 | if (put_user(SNDRV_CTL_TLVT_CHMAP_FIXED, dst) || | |
2368 | put_user(chs_bytes, dst + 1)) | |
2369 | return -EFAULT; | |
2370 | dst += 2; | |
2371 | size -= 8; | |
2372 | count += 8; | |
2373 | if (size < chs_bytes) | |
2374 | return -ENOMEM; | |
2375 | size -= chs_bytes; | |
2376 | count += chs_bytes; | |
2377 | for (c = 0; c < map->channels; c++) { | |
2378 | if (put_user(map->map[c], dst)) | |
2379 | return -EFAULT; | |
2380 | dst++; | |
2381 | } | |
2382 | } | |
2383 | if (put_user(count, tlv + 1)) | |
2384 | return -EFAULT; | |
2385 | return 0; | |
2386 | } | |
2387 | ||
2388 | static void pcm_chmap_ctl_private_free(struct snd_kcontrol *kcontrol) | |
2389 | { | |
2390 | struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol); | |
2391 | info->pcm->streams[info->stream].chmap_kctl = NULL; | |
2392 | kfree(info); | |
2393 | } | |
2394 | ||
2395 | /** | |
2396 | * snd_pcm_add_chmap_ctls - create channel-mapping control elements | |
2397 | * @pcm: the assigned PCM instance | |
2398 | * @stream: stream direction | |
2399 | * @chmap: channel map elements (for query) | |
2400 | * @max_channels: the max number of channels for the stream | |
2401 | * @private_value: the value passed to each kcontrol's private_value field | |
2402 | * @info_ret: store struct snd_pcm_chmap instance if non-NULL | |
2403 | * | |
2404 | * Create channel-mapping control elements assigned to the given PCM stream(s). | |
eb7c06e8 | 2405 | * Return: Zero if successful, or a negative error value. |
2d3391ec TI |
2406 | */ |
2407 | int snd_pcm_add_chmap_ctls(struct snd_pcm *pcm, int stream, | |
2408 | const struct snd_pcm_chmap_elem *chmap, | |
2409 | int max_channels, | |
2410 | unsigned long private_value, | |
2411 | struct snd_pcm_chmap **info_ret) | |
2412 | { | |
2413 | struct snd_pcm_chmap *info; | |
2414 | struct snd_kcontrol_new knew = { | |
2415 | .iface = SNDRV_CTL_ELEM_IFACE_PCM, | |
2416 | .access = SNDRV_CTL_ELEM_ACCESS_READ | | |
2d3391ec TI |
2417 | SNDRV_CTL_ELEM_ACCESS_TLV_READ | |
2418 | SNDRV_CTL_ELEM_ACCESS_TLV_CALLBACK, | |
2419 | .info = pcm_chmap_ctl_info, | |
2420 | .get = pcm_chmap_ctl_get, | |
2421 | .tlv.c = pcm_chmap_ctl_tlv, | |
2422 | }; | |
2423 | int err; | |
2424 | ||
8d879be8 TI |
2425 | if (WARN_ON(pcm->streams[stream].chmap_kctl)) |
2426 | return -EBUSY; | |
2d3391ec TI |
2427 | info = kzalloc(sizeof(*info), GFP_KERNEL); |
2428 | if (!info) | |
2429 | return -ENOMEM; | |
2430 | info->pcm = pcm; | |
2431 | info->stream = stream; | |
2432 | info->chmap = chmap; | |
2433 | info->max_channels = max_channels; | |
2434 | if (stream == SNDRV_PCM_STREAM_PLAYBACK) | |
2435 | knew.name = "Playback Channel Map"; | |
2436 | else | |
2437 | knew.name = "Capture Channel Map"; | |
2438 | knew.device = pcm->device; | |
2439 | knew.count = pcm->streams[stream].substream_count; | |
2440 | knew.private_value = private_value; | |
2441 | info->kctl = snd_ctl_new1(&knew, info); | |
2442 | if (!info->kctl) { | |
2443 | kfree(info); | |
2444 | return -ENOMEM; | |
2445 | } | |
2446 | info->kctl->private_free = pcm_chmap_ctl_private_free; | |
2447 | err = snd_ctl_add(pcm->card, info->kctl); | |
2448 | if (err < 0) | |
2449 | return err; | |
2450 | pcm->streams[stream].chmap_kctl = info->kctl; | |
2451 | if (info_ret) | |
2452 | *info_ret = info; | |
2453 | return 0; | |
2454 | } | |
2455 | EXPORT_SYMBOL_GPL(snd_pcm_add_chmap_ctls); |