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Commit | Line | Data |
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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 | ||
f5914908 TI |
36 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
37 | #define CREATE_TRACE_POINTS | |
38 | #include "pcm_trace.h" | |
39 | #else | |
40 | #define trace_hwptr(substream, pos, in_interrupt) | |
41 | #define trace_xrun(substream) | |
42 | #define trace_hw_ptr_error(substream, reason) | |
43 | #endif | |
44 | ||
1da177e4 LT |
45 | /* |
46 | * fill ring buffer with silence | |
47 | * runtime->silence_start: starting pointer to silence area | |
48 | * runtime->silence_filled: size filled with silence | |
49 | * runtime->silence_threshold: threshold from application | |
50 | * runtime->silence_size: maximal size from application | |
51 | * | |
52 | * when runtime->silence_size >= runtime->boundary - fill processed area with silence immediately | |
53 | */ | |
877211f5 | 54 | void snd_pcm_playback_silence(struct snd_pcm_substream *substream, snd_pcm_uframes_t new_hw_ptr) |
1da177e4 | 55 | { |
877211f5 | 56 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
57 | snd_pcm_uframes_t frames, ofs, transfer; |
58 | ||
59 | if (runtime->silence_size < runtime->boundary) { | |
60 | snd_pcm_sframes_t noise_dist, n; | |
61 | if (runtime->silence_start != runtime->control->appl_ptr) { | |
62 | n = runtime->control->appl_ptr - runtime->silence_start; | |
63 | if (n < 0) | |
64 | n += runtime->boundary; | |
65 | if ((snd_pcm_uframes_t)n < runtime->silence_filled) | |
66 | runtime->silence_filled -= n; | |
67 | else | |
68 | runtime->silence_filled = 0; | |
69 | runtime->silence_start = runtime->control->appl_ptr; | |
70 | } | |
235475cb | 71 | if (runtime->silence_filled >= runtime->buffer_size) |
1da177e4 | 72 | return; |
1da177e4 LT |
73 | noise_dist = snd_pcm_playback_hw_avail(runtime) + runtime->silence_filled; |
74 | if (noise_dist >= (snd_pcm_sframes_t) runtime->silence_threshold) | |
75 | return; | |
76 | frames = runtime->silence_threshold - noise_dist; | |
77 | if (frames > runtime->silence_size) | |
78 | frames = runtime->silence_size; | |
79 | } else { | |
80 | if (new_hw_ptr == ULONG_MAX) { /* initialization */ | |
81 | snd_pcm_sframes_t avail = snd_pcm_playback_hw_avail(runtime); | |
9e216e8a JK |
82 | if (avail > runtime->buffer_size) |
83 | avail = runtime->buffer_size; | |
1da177e4 LT |
84 | runtime->silence_filled = avail > 0 ? avail : 0; |
85 | runtime->silence_start = (runtime->status->hw_ptr + | |
86 | runtime->silence_filled) % | |
87 | runtime->boundary; | |
88 | } else { | |
89 | ofs = runtime->status->hw_ptr; | |
90 | frames = new_hw_ptr - ofs; | |
91 | if ((snd_pcm_sframes_t)frames < 0) | |
92 | frames += runtime->boundary; | |
93 | runtime->silence_filled -= frames; | |
94 | if ((snd_pcm_sframes_t)runtime->silence_filled < 0) { | |
95 | runtime->silence_filled = 0; | |
9a826ddb | 96 | runtime->silence_start = new_hw_ptr; |
1da177e4 | 97 | } else { |
9a826ddb | 98 | runtime->silence_start = ofs; |
1da177e4 | 99 | } |
1da177e4 LT |
100 | } |
101 | frames = runtime->buffer_size - runtime->silence_filled; | |
102 | } | |
7eaa943c TI |
103 | if (snd_BUG_ON(frames > runtime->buffer_size)) |
104 | return; | |
1da177e4 LT |
105 | if (frames == 0) |
106 | return; | |
9a826ddb | 107 | ofs = runtime->silence_start % runtime->buffer_size; |
1da177e4 LT |
108 | while (frames > 0) { |
109 | transfer = ofs + frames > runtime->buffer_size ? runtime->buffer_size - ofs : frames; | |
110 | if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED || | |
111 | runtime->access == SNDRV_PCM_ACCESS_MMAP_INTERLEAVED) { | |
112 | if (substream->ops->silence) { | |
113 | int err; | |
114 | err = substream->ops->silence(substream, -1, ofs, transfer); | |
7eaa943c | 115 | snd_BUG_ON(err < 0); |
1da177e4 LT |
116 | } else { |
117 | char *hwbuf = runtime->dma_area + frames_to_bytes(runtime, ofs); | |
118 | snd_pcm_format_set_silence(runtime->format, hwbuf, transfer * runtime->channels); | |
119 | } | |
120 | } else { | |
121 | unsigned int c; | |
122 | unsigned int channels = runtime->channels; | |
123 | if (substream->ops->silence) { | |
124 | for (c = 0; c < channels; ++c) { | |
125 | int err; | |
126 | err = substream->ops->silence(substream, c, ofs, transfer); | |
7eaa943c | 127 | snd_BUG_ON(err < 0); |
1da177e4 LT |
128 | } |
129 | } else { | |
130 | size_t dma_csize = runtime->dma_bytes / channels; | |
131 | for (c = 0; c < channels; ++c) { | |
132 | char *hwbuf = runtime->dma_area + (c * dma_csize) + samples_to_bytes(runtime, ofs); | |
133 | snd_pcm_format_set_silence(runtime->format, hwbuf, transfer); | |
134 | } | |
135 | } | |
136 | } | |
137 | runtime->silence_filled += transfer; | |
138 | frames -= transfer; | |
139 | ofs = 0; | |
140 | } | |
141 | } | |
142 | ||
acb03d44 EB |
143 | #ifdef CONFIG_SND_DEBUG |
144 | void snd_pcm_debug_name(struct snd_pcm_substream *substream, | |
c0070110 TI |
145 | char *name, size_t len) |
146 | { | |
147 | snprintf(name, len, "pcmC%dD%d%c:%d", | |
148 | substream->pcm->card->number, | |
149 | substream->pcm->device, | |
150 | substream->stream ? 'c' : 'p', | |
151 | substream->number); | |
152 | } | |
acb03d44 EB |
153 | EXPORT_SYMBOL(snd_pcm_debug_name); |
154 | #endif | |
c0070110 | 155 | |
741b20cf JK |
156 | #define XRUN_DEBUG_BASIC (1<<0) |
157 | #define XRUN_DEBUG_STACK (1<<1) /* dump also stack */ | |
158 | #define XRUN_DEBUG_JIFFIESCHECK (1<<2) /* do jiffies check */ | |
741b20cf | 159 | |
ed3da3d9 | 160 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
4d96eb25 | 161 | |
741b20cf JK |
162 | #define xrun_debug(substream, mask) \ |
163 | ((substream)->pstr->xrun_debug & (mask)) | |
0f17014b JN |
164 | #else |
165 | #define xrun_debug(substream, mask) 0 | |
166 | #endif | |
ed3da3d9 | 167 | |
741b20cf JK |
168 | #define dump_stack_on_xrun(substream) do { \ |
169 | if (xrun_debug(substream, XRUN_DEBUG_STACK)) \ | |
170 | dump_stack(); \ | |
ed3da3d9 TI |
171 | } while (0) |
172 | ||
877211f5 | 173 | static void xrun(struct snd_pcm_substream *substream) |
1da177e4 | 174 | { |
13f040f9 JK |
175 | struct snd_pcm_runtime *runtime = substream->runtime; |
176 | ||
f5914908 | 177 | trace_xrun(substream); |
13f040f9 JK |
178 | if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) |
179 | snd_pcm_gettime(runtime, (struct timespec *)&runtime->status->tstamp); | |
1da177e4 | 180 | snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN); |
741b20cf | 181 | if (xrun_debug(substream, XRUN_DEBUG_BASIC)) { |
c0070110 | 182 | char name[16]; |
acb03d44 | 183 | snd_pcm_debug_name(substream, name, sizeof(name)); |
09e56df8 | 184 | pcm_warn(substream->pcm, "XRUN: %s\n", name); |
ed3da3d9 | 185 | dump_stack_on_xrun(substream); |
1da177e4 | 186 | } |
1da177e4 LT |
187 | } |
188 | ||
0f17014b | 189 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
f5914908 | 190 | #define hw_ptr_error(substream, in_interrupt, reason, fmt, args...) \ |
4d96eb25 | 191 | do { \ |
f5914908 | 192 | trace_hw_ptr_error(substream, reason); \ |
4d96eb25 | 193 | if (xrun_debug(substream, XRUN_DEBUG_BASIC)) { \ |
f5914908 TI |
194 | pr_err_ratelimited("ALSA: PCM: [%c] " reason ": " fmt, \ |
195 | (in_interrupt) ? 'Q' : 'P', ##args); \ | |
4d96eb25 JK |
196 | dump_stack_on_xrun(substream); \ |
197 | } \ | |
198 | } while (0) | |
199 | ||
4d96eb25 JK |
200 | #else /* ! CONFIG_SND_PCM_XRUN_DEBUG */ |
201 | ||
4d96eb25 | 202 | #define hw_ptr_error(substream, fmt, args...) do { } while (0) |
4d96eb25 JK |
203 | |
204 | #endif | |
205 | ||
1250932e JK |
206 | int snd_pcm_update_state(struct snd_pcm_substream *substream, |
207 | struct snd_pcm_runtime *runtime) | |
1da177e4 LT |
208 | { |
209 | snd_pcm_uframes_t avail; | |
210 | ||
211 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) | |
212 | avail = snd_pcm_playback_avail(runtime); | |
213 | else | |
214 | avail = snd_pcm_capture_avail(runtime); | |
215 | if (avail > runtime->avail_max) | |
216 | runtime->avail_max = avail; | |
4cdc115f TI |
217 | if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) { |
218 | if (avail >= runtime->buffer_size) { | |
1da177e4 | 219 | snd_pcm_drain_done(substream); |
4cdc115f TI |
220 | return -EPIPE; |
221 | } | |
222 | } else { | |
223 | if (avail >= runtime->stop_threshold) { | |
1da177e4 | 224 | xrun(substream); |
4cdc115f TI |
225 | return -EPIPE; |
226 | } | |
1da177e4 | 227 | } |
5daeba34 DD |
228 | if (runtime->twake) { |
229 | if (avail >= runtime->twake) | |
230 | wake_up(&runtime->tsleep); | |
231 | } else if (avail >= runtime->control->avail_min) | |
232 | wake_up(&runtime->sleep); | |
1da177e4 LT |
233 | return 0; |
234 | } | |
235 | ||
3179f620 PLB |
236 | static void update_audio_tstamp(struct snd_pcm_substream *substream, |
237 | struct timespec *curr_tstamp, | |
238 | struct timespec *audio_tstamp) | |
239 | { | |
240 | struct snd_pcm_runtime *runtime = substream->runtime; | |
241 | u64 audio_frames, audio_nsecs; | |
242 | struct timespec driver_tstamp; | |
243 | ||
244 | if (runtime->tstamp_mode != SNDRV_PCM_TSTAMP_ENABLE) | |
245 | return; | |
246 | ||
247 | if (!(substream->ops->get_time_info) || | |
248 | (runtime->audio_tstamp_report.actual_type == | |
249 | SNDRV_PCM_AUDIO_TSTAMP_TYPE_DEFAULT)) { | |
250 | ||
251 | /* | |
252 | * provide audio timestamp derived from pointer position | |
253 | * add delay only if requested | |
254 | */ | |
255 | ||
256 | audio_frames = runtime->hw_ptr_wrap + runtime->status->hw_ptr; | |
257 | ||
258 | if (runtime->audio_tstamp_config.report_delay) { | |
259 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) | |
260 | audio_frames -= runtime->delay; | |
261 | else | |
262 | audio_frames += runtime->delay; | |
263 | } | |
264 | audio_nsecs = div_u64(audio_frames * 1000000000LL, | |
265 | runtime->rate); | |
266 | *audio_tstamp = ns_to_timespec(audio_nsecs); | |
267 | } | |
268 | runtime->status->audio_tstamp = *audio_tstamp; | |
269 | runtime->status->tstamp = *curr_tstamp; | |
270 | ||
271 | /* | |
272 | * re-take a driver timestamp to let apps detect if the reference tstamp | |
273 | * read by low-level hardware was provided with a delay | |
274 | */ | |
275 | snd_pcm_gettime(substream->runtime, (struct timespec *)&driver_tstamp); | |
276 | runtime->driver_tstamp = driver_tstamp; | |
277 | } | |
278 | ||
f240406b JK |
279 | static int snd_pcm_update_hw_ptr0(struct snd_pcm_substream *substream, |
280 | unsigned int in_interrupt) | |
1da177e4 | 281 | { |
877211f5 | 282 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 | 283 | snd_pcm_uframes_t pos; |
f240406b | 284 | snd_pcm_uframes_t old_hw_ptr, new_hw_ptr, hw_base; |
bbf6ad13 JK |
285 | snd_pcm_sframes_t hdelta, delta; |
286 | unsigned long jdelta; | |
3509a03f PLB |
287 | unsigned long curr_jiffies; |
288 | struct timespec curr_tstamp; | |
4eeaaeae | 289 | struct timespec audio_tstamp; |
0e8014d7 | 290 | int crossed_boundary = 0; |
1da177e4 | 291 | |
bbf6ad13 | 292 | old_hw_ptr = runtime->status->hw_ptr; |
3509a03f PLB |
293 | |
294 | /* | |
295 | * group pointer, time and jiffies reads to allow for more | |
296 | * accurate correlations/corrections. | |
297 | * The values are stored at the end of this routine after | |
298 | * corrections for hw_ptr position | |
299 | */ | |
f240406b | 300 | pos = substream->ops->pointer(substream); |
3509a03f | 301 | curr_jiffies = jiffies; |
4eeaaeae | 302 | if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) { |
3179f620 PLB |
303 | if ((substream->ops->get_time_info) && |
304 | (runtime->audio_tstamp_config.type_requested != SNDRV_PCM_AUDIO_TSTAMP_TYPE_DEFAULT)) { | |
305 | substream->ops->get_time_info(substream, &curr_tstamp, | |
306 | &audio_tstamp, | |
307 | &runtime->audio_tstamp_config, | |
308 | &runtime->audio_tstamp_report); | |
309 | ||
310 | /* re-test in case tstamp type is not supported in hardware and was demoted to DEFAULT */ | |
311 | if (runtime->audio_tstamp_report.actual_type == SNDRV_PCM_AUDIO_TSTAMP_TYPE_DEFAULT) | |
312 | snd_pcm_gettime(runtime, (struct timespec *)&curr_tstamp); | |
313 | } else | |
314 | snd_pcm_gettime(runtime, (struct timespec *)&curr_tstamp); | |
4eeaaeae PLB |
315 | } |
316 | ||
1da177e4 LT |
317 | if (pos == SNDRV_PCM_POS_XRUN) { |
318 | xrun(substream); | |
319 | return -EPIPE; | |
320 | } | |
f240406b | 321 | if (pos >= runtime->buffer_size) { |
09e56df8 | 322 | if (printk_ratelimit()) { |
f240406b | 323 | char name[16]; |
acb03d44 | 324 | snd_pcm_debug_name(substream, name, sizeof(name)); |
09e56df8 | 325 | pcm_err(substream->pcm, |
0ab1ace8 | 326 | "invalid position: %s, pos = %ld, buffer size = %ld, period size = %ld\n", |
09e56df8 TI |
327 | name, pos, runtime->buffer_size, |
328 | runtime->period_size); | |
f240406b JK |
329 | } |
330 | pos = 0; | |
cedb8118 | 331 | } |
f240406b | 332 | pos -= pos % runtime->min_align; |
f5914908 | 333 | trace_hwptr(substream, pos, in_interrupt); |
ed3da3d9 TI |
334 | hw_base = runtime->hw_ptr_base; |
335 | new_hw_ptr = hw_base + pos; | |
f240406b JK |
336 | if (in_interrupt) { |
337 | /* we know that one period was processed */ | |
338 | /* delta = "expected next hw_ptr" for in_interrupt != 0 */ | |
e7636925 | 339 | delta = runtime->hw_ptr_interrupt + runtime->period_size; |
f240406b | 340 | if (delta > new_hw_ptr) { |
bd76af0f | 341 | /* check for double acknowledged interrupts */ |
3509a03f | 342 | hdelta = curr_jiffies - runtime->hw_ptr_jiffies; |
13a98839 | 343 | if (hdelta > runtime->hw_ptr_buffer_jiffies/2 + 1) { |
bd76af0f | 344 | hw_base += runtime->buffer_size; |
0e8014d7 | 345 | if (hw_base >= runtime->boundary) { |
bd76af0f | 346 | hw_base = 0; |
0e8014d7 PLB |
347 | crossed_boundary++; |
348 | } | |
bd76af0f JK |
349 | new_hw_ptr = hw_base + pos; |
350 | goto __delta; | |
351 | } | |
1da177e4 | 352 | } |
1da177e4 | 353 | } |
f240406b JK |
354 | /* new_hw_ptr might be lower than old_hw_ptr in case when */ |
355 | /* pointer crosses the end of the ring buffer */ | |
356 | if (new_hw_ptr < old_hw_ptr) { | |
357 | hw_base += runtime->buffer_size; | |
0e8014d7 | 358 | if (hw_base >= runtime->boundary) { |
f240406b | 359 | hw_base = 0; |
0e8014d7 PLB |
360 | crossed_boundary++; |
361 | } | |
f240406b JK |
362 | new_hw_ptr = hw_base + pos; |
363 | } | |
364 | __delta: | |
b406e610 CL |
365 | delta = new_hw_ptr - old_hw_ptr; |
366 | if (delta < 0) | |
367 | delta += runtime->boundary; | |
ab69a490 | 368 | |
59ff878f | 369 | if (runtime->no_period_wakeup) { |
12ff414e | 370 | snd_pcm_sframes_t xrun_threshold; |
59ff878f CL |
371 | /* |
372 | * Without regular period interrupts, we have to check | |
373 | * the elapsed time to detect xruns. | |
374 | */ | |
3509a03f | 375 | jdelta = curr_jiffies - runtime->hw_ptr_jiffies; |
47228e48 CL |
376 | if (jdelta < runtime->hw_ptr_buffer_jiffies / 2) |
377 | goto no_delta_check; | |
59ff878f | 378 | hdelta = jdelta - delta * HZ / runtime->rate; |
12ff414e KA |
379 | xrun_threshold = runtime->hw_ptr_buffer_jiffies / 2 + 1; |
380 | while (hdelta > xrun_threshold) { | |
59ff878f CL |
381 | delta += runtime->buffer_size; |
382 | hw_base += runtime->buffer_size; | |
0e8014d7 | 383 | if (hw_base >= runtime->boundary) { |
59ff878f | 384 | hw_base = 0; |
0e8014d7 PLB |
385 | crossed_boundary++; |
386 | } | |
59ff878f CL |
387 | new_hw_ptr = hw_base + pos; |
388 | hdelta -= runtime->hw_ptr_buffer_jiffies; | |
389 | } | |
ab69a490 | 390 | goto no_delta_check; |
59ff878f | 391 | } |
ab69a490 | 392 | |
f240406b | 393 | /* something must be really wrong */ |
7b3a177b | 394 | if (delta >= runtime->buffer_size + runtime->period_size) { |
f5914908 TI |
395 | hw_ptr_error(substream, in_interrupt, "Unexpected hw_ptr", |
396 | "(stream=%i, pos=%ld, new_hw_ptr=%ld, old_hw_ptr=%ld)\n", | |
397 | substream->stream, (long)pos, | |
398 | (long)new_hw_ptr, (long)old_hw_ptr); | |
f240406b JK |
399 | return 0; |
400 | } | |
c87d9732 TI |
401 | |
402 | /* Do jiffies check only in xrun_debug mode */ | |
741b20cf | 403 | if (!xrun_debug(substream, XRUN_DEBUG_JIFFIESCHECK)) |
c87d9732 TI |
404 | goto no_jiffies_check; |
405 | ||
3e5b5016 TI |
406 | /* Skip the jiffies check for hardwares with BATCH flag. |
407 | * Such hardware usually just increases the position at each IRQ, | |
408 | * thus it can't give any strange position. | |
409 | */ | |
410 | if (runtime->hw.info & SNDRV_PCM_INFO_BATCH) | |
411 | goto no_jiffies_check; | |
f240406b | 412 | hdelta = delta; |
a4444da3 JK |
413 | if (hdelta < runtime->delay) |
414 | goto no_jiffies_check; | |
415 | hdelta -= runtime->delay; | |
3509a03f | 416 | jdelta = curr_jiffies - runtime->hw_ptr_jiffies; |
bbf6ad13 JK |
417 | if (((hdelta * HZ) / runtime->rate) > jdelta + HZ/100) { |
418 | delta = jdelta / | |
419 | (((runtime->period_size * HZ) / runtime->rate) | |
420 | + HZ/100); | |
f240406b JK |
421 | /* move new_hw_ptr according jiffies not pos variable */ |
422 | new_hw_ptr = old_hw_ptr; | |
ed69c6a8 | 423 | hw_base = delta; |
f240406b JK |
424 | /* use loop to avoid checks for delta overflows */ |
425 | /* the delta value is small or zero in most cases */ | |
426 | while (delta > 0) { | |
427 | new_hw_ptr += runtime->period_size; | |
0e8014d7 | 428 | if (new_hw_ptr >= runtime->boundary) { |
f240406b | 429 | new_hw_ptr -= runtime->boundary; |
0e8014d7 PLB |
430 | crossed_boundary--; |
431 | } | |
f240406b JK |
432 | delta--; |
433 | } | |
434 | /* align hw_base to buffer_size */ | |
f5914908 TI |
435 | hw_ptr_error(substream, in_interrupt, "hw_ptr skipping", |
436 | "(pos=%ld, delta=%ld, period=%ld, jdelta=%lu/%lu/%lu, hw_ptr=%ld/%ld)\n", | |
bbf6ad13 JK |
437 | (long)pos, (long)hdelta, |
438 | (long)runtime->period_size, jdelta, | |
ed69c6a8 | 439 | ((hdelta * HZ) / runtime->rate), hw_base, |
f240406b JK |
440 | (unsigned long)old_hw_ptr, |
441 | (unsigned long)new_hw_ptr); | |
ed69c6a8 JK |
442 | /* reset values to proper state */ |
443 | delta = 0; | |
444 | hw_base = new_hw_ptr - (new_hw_ptr % runtime->buffer_size); | |
bbf6ad13 | 445 | } |
3e5b5016 | 446 | no_jiffies_check: |
bbf6ad13 | 447 | if (delta > runtime->period_size + runtime->period_size / 2) { |
f5914908 TI |
448 | hw_ptr_error(substream, in_interrupt, |
449 | "Lost interrupts?", | |
450 | "(stream=%i, delta=%ld, new_hw_ptr=%ld, old_hw_ptr=%ld)\n", | |
ed3da3d9 | 451 | substream->stream, (long)delta, |
f240406b JK |
452 | (long)new_hw_ptr, |
453 | (long)old_hw_ptr); | |
ed3da3d9 | 454 | } |
f240406b | 455 | |
ab69a490 | 456 | no_delta_check: |
3179f620 PLB |
457 | if (runtime->status->hw_ptr == new_hw_ptr) { |
458 | update_audio_tstamp(substream, &curr_tstamp, &audio_tstamp); | |
f240406b | 459 | return 0; |
3179f620 | 460 | } |
ab1863fc | 461 | |
1da177e4 LT |
462 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && |
463 | runtime->silence_size > 0) | |
464 | snd_pcm_playback_silence(substream, new_hw_ptr); | |
465 | ||
e7636925 | 466 | if (in_interrupt) { |
ead4046b CL |
467 | delta = new_hw_ptr - runtime->hw_ptr_interrupt; |
468 | if (delta < 0) | |
469 | delta += runtime->boundary; | |
470 | delta -= (snd_pcm_uframes_t)delta % runtime->period_size; | |
471 | runtime->hw_ptr_interrupt += delta; | |
472 | if (runtime->hw_ptr_interrupt >= runtime->boundary) | |
473 | runtime->hw_ptr_interrupt -= runtime->boundary; | |
e7636925 | 474 | } |
ed3da3d9 | 475 | runtime->hw_ptr_base = hw_base; |
1da177e4 | 476 | runtime->status->hw_ptr = new_hw_ptr; |
3509a03f | 477 | runtime->hw_ptr_jiffies = curr_jiffies; |
0e8014d7 PLB |
478 | if (crossed_boundary) { |
479 | snd_BUG_ON(crossed_boundary != 1); | |
480 | runtime->hw_ptr_wrap += runtime->boundary; | |
481 | } | |
4eeaaeae | 482 | |
3179f620 | 483 | update_audio_tstamp(substream, &curr_tstamp, &audio_tstamp); |
4eeaaeae | 484 | |
1250932e | 485 | return snd_pcm_update_state(substream, runtime); |
1da177e4 LT |
486 | } |
487 | ||
488 | /* CAUTION: call it with irq disabled */ | |
877211f5 | 489 | int snd_pcm_update_hw_ptr(struct snd_pcm_substream *substream) |
1da177e4 | 490 | { |
f240406b | 491 | return snd_pcm_update_hw_ptr0(substream, 0); |
1da177e4 LT |
492 | } |
493 | ||
494 | /** | |
495 | * snd_pcm_set_ops - set the PCM operators | |
496 | * @pcm: the pcm instance | |
497 | * @direction: stream direction, SNDRV_PCM_STREAM_XXX | |
498 | * @ops: the operator table | |
499 | * | |
500 | * Sets the given PCM operators to the pcm instance. | |
501 | */ | |
e6c2e7eb LPC |
502 | void snd_pcm_set_ops(struct snd_pcm *pcm, int direction, |
503 | const struct snd_pcm_ops *ops) | |
1da177e4 | 504 | { |
877211f5 TI |
505 | struct snd_pcm_str *stream = &pcm->streams[direction]; |
506 | struct snd_pcm_substream *substream; | |
1da177e4 LT |
507 | |
508 | for (substream = stream->substream; substream != NULL; substream = substream->next) | |
509 | substream->ops = ops; | |
510 | } | |
511 | ||
e88e8ae6 | 512 | EXPORT_SYMBOL(snd_pcm_set_ops); |
1da177e4 LT |
513 | |
514 | /** | |
515 | * snd_pcm_sync - set the PCM sync id | |
516 | * @substream: the pcm substream | |
517 | * | |
518 | * Sets the PCM sync identifier for the card. | |
519 | */ | |
877211f5 | 520 | void snd_pcm_set_sync(struct snd_pcm_substream *substream) |
1da177e4 | 521 | { |
877211f5 | 522 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
523 | |
524 | runtime->sync.id32[0] = substream->pcm->card->number; | |
525 | runtime->sync.id32[1] = -1; | |
526 | runtime->sync.id32[2] = -1; | |
527 | runtime->sync.id32[3] = -1; | |
528 | } | |
529 | ||
e88e8ae6 TI |
530 | EXPORT_SYMBOL(snd_pcm_set_sync); |
531 | ||
1da177e4 LT |
532 | /* |
533 | * Standard ioctl routine | |
534 | */ | |
535 | ||
1da177e4 LT |
536 | static inline unsigned int div32(unsigned int a, unsigned int b, |
537 | unsigned int *r) | |
538 | { | |
539 | if (b == 0) { | |
540 | *r = 0; | |
541 | return UINT_MAX; | |
542 | } | |
543 | *r = a % b; | |
544 | return a / b; | |
545 | } | |
546 | ||
547 | static inline unsigned int div_down(unsigned int a, unsigned int b) | |
548 | { | |
549 | if (b == 0) | |
550 | return UINT_MAX; | |
551 | return a / b; | |
552 | } | |
553 | ||
554 | static inline unsigned int div_up(unsigned int a, unsigned int b) | |
555 | { | |
556 | unsigned int r; | |
557 | unsigned int q; | |
558 | if (b == 0) | |
559 | return UINT_MAX; | |
560 | q = div32(a, b, &r); | |
561 | if (r) | |
562 | ++q; | |
563 | return q; | |
564 | } | |
565 | ||
566 | static inline unsigned int mul(unsigned int a, unsigned int b) | |
567 | { | |
568 | if (a == 0) | |
569 | return 0; | |
570 | if (div_down(UINT_MAX, a) < b) | |
571 | return UINT_MAX; | |
572 | return a * b; | |
573 | } | |
574 | ||
575 | static inline unsigned int muldiv32(unsigned int a, unsigned int b, | |
576 | unsigned int c, unsigned int *r) | |
577 | { | |
578 | u_int64_t n = (u_int64_t) a * b; | |
579 | if (c == 0) { | |
7eaa943c | 580 | snd_BUG_ON(!n); |
1da177e4 LT |
581 | *r = 0; |
582 | return UINT_MAX; | |
583 | } | |
3f7440a6 | 584 | n = div_u64_rem(n, c, r); |
1da177e4 LT |
585 | if (n >= UINT_MAX) { |
586 | *r = 0; | |
587 | return UINT_MAX; | |
588 | } | |
589 | return n; | |
590 | } | |
591 | ||
1da177e4 LT |
592 | /** |
593 | * snd_interval_refine - refine the interval value of configurator | |
594 | * @i: the interval value to refine | |
595 | * @v: the interval value to refer to | |
596 | * | |
597 | * Refines the interval value with the reference value. | |
598 | * The interval is changed to the range satisfying both intervals. | |
599 | * The interval status (min, max, integer, etc.) are evaluated. | |
600 | * | |
eb7c06e8 YB |
601 | * Return: Positive if the value is changed, zero if it's not changed, or a |
602 | * negative error code. | |
1da177e4 | 603 | */ |
877211f5 | 604 | int snd_interval_refine(struct snd_interval *i, const struct snd_interval *v) |
1da177e4 LT |
605 | { |
606 | int changed = 0; | |
7eaa943c TI |
607 | if (snd_BUG_ON(snd_interval_empty(i))) |
608 | return -EINVAL; | |
1da177e4 LT |
609 | if (i->min < v->min) { |
610 | i->min = v->min; | |
611 | i->openmin = v->openmin; | |
612 | changed = 1; | |
613 | } else if (i->min == v->min && !i->openmin && v->openmin) { | |
614 | i->openmin = 1; | |
615 | changed = 1; | |
616 | } | |
617 | if (i->max > v->max) { | |
618 | i->max = v->max; | |
619 | i->openmax = v->openmax; | |
620 | changed = 1; | |
621 | } else if (i->max == v->max && !i->openmax && v->openmax) { | |
622 | i->openmax = 1; | |
623 | changed = 1; | |
624 | } | |
625 | if (!i->integer && v->integer) { | |
626 | i->integer = 1; | |
627 | changed = 1; | |
628 | } | |
629 | if (i->integer) { | |
630 | if (i->openmin) { | |
631 | i->min++; | |
632 | i->openmin = 0; | |
633 | } | |
634 | if (i->openmax) { | |
635 | i->max--; | |
636 | i->openmax = 0; | |
637 | } | |
638 | } else if (!i->openmin && !i->openmax && i->min == i->max) | |
639 | i->integer = 1; | |
640 | if (snd_interval_checkempty(i)) { | |
641 | snd_interval_none(i); | |
642 | return -EINVAL; | |
643 | } | |
644 | return changed; | |
645 | } | |
646 | ||
e88e8ae6 TI |
647 | EXPORT_SYMBOL(snd_interval_refine); |
648 | ||
877211f5 | 649 | static int snd_interval_refine_first(struct snd_interval *i) |
1da177e4 | 650 | { |
7eaa943c TI |
651 | if (snd_BUG_ON(snd_interval_empty(i))) |
652 | return -EINVAL; | |
1da177e4 LT |
653 | if (snd_interval_single(i)) |
654 | return 0; | |
655 | i->max = i->min; | |
656 | i->openmax = i->openmin; | |
657 | if (i->openmax) | |
658 | i->max++; | |
659 | return 1; | |
660 | } | |
661 | ||
877211f5 | 662 | static int snd_interval_refine_last(struct snd_interval *i) |
1da177e4 | 663 | { |
7eaa943c TI |
664 | if (snd_BUG_ON(snd_interval_empty(i))) |
665 | return -EINVAL; | |
1da177e4 LT |
666 | if (snd_interval_single(i)) |
667 | return 0; | |
668 | i->min = i->max; | |
669 | i->openmin = i->openmax; | |
670 | if (i->openmin) | |
671 | i->min--; | |
672 | return 1; | |
673 | } | |
674 | ||
877211f5 | 675 | void snd_interval_mul(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c) |
1da177e4 LT |
676 | { |
677 | if (a->empty || b->empty) { | |
678 | snd_interval_none(c); | |
679 | return; | |
680 | } | |
681 | c->empty = 0; | |
682 | c->min = mul(a->min, b->min); | |
683 | c->openmin = (a->openmin || b->openmin); | |
684 | c->max = mul(a->max, b->max); | |
685 | c->openmax = (a->openmax || b->openmax); | |
686 | c->integer = (a->integer && b->integer); | |
687 | } | |
688 | ||
689 | /** | |
690 | * snd_interval_div - refine the interval value with division | |
df8db936 TI |
691 | * @a: dividend |
692 | * @b: divisor | |
693 | * @c: quotient | |
1da177e4 LT |
694 | * |
695 | * c = a / b | |
696 | * | |
697 | * Returns non-zero if the value is changed, zero if not changed. | |
698 | */ | |
877211f5 | 699 | void snd_interval_div(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c) |
1da177e4 LT |
700 | { |
701 | unsigned int r; | |
702 | if (a->empty || b->empty) { | |
703 | snd_interval_none(c); | |
704 | return; | |
705 | } | |
706 | c->empty = 0; | |
707 | c->min = div32(a->min, b->max, &r); | |
708 | c->openmin = (r || a->openmin || b->openmax); | |
709 | if (b->min > 0) { | |
710 | c->max = div32(a->max, b->min, &r); | |
711 | if (r) { | |
712 | c->max++; | |
713 | c->openmax = 1; | |
714 | } else | |
715 | c->openmax = (a->openmax || b->openmin); | |
716 | } else { | |
717 | c->max = UINT_MAX; | |
718 | c->openmax = 0; | |
719 | } | |
720 | c->integer = 0; | |
721 | } | |
722 | ||
723 | /** | |
724 | * snd_interval_muldivk - refine the interval value | |
df8db936 TI |
725 | * @a: dividend 1 |
726 | * @b: dividend 2 | |
727 | * @k: divisor (as integer) | |
728 | * @c: result | |
729 | * | |
1da177e4 LT |
730 | * c = a * b / k |
731 | * | |
732 | * Returns non-zero if the value is changed, zero if not changed. | |
733 | */ | |
877211f5 TI |
734 | void snd_interval_muldivk(const struct snd_interval *a, const struct snd_interval *b, |
735 | unsigned int k, struct snd_interval *c) | |
1da177e4 LT |
736 | { |
737 | unsigned int r; | |
738 | if (a->empty || b->empty) { | |
739 | snd_interval_none(c); | |
740 | return; | |
741 | } | |
742 | c->empty = 0; | |
743 | c->min = muldiv32(a->min, b->min, k, &r); | |
744 | c->openmin = (r || a->openmin || b->openmin); | |
745 | c->max = muldiv32(a->max, b->max, k, &r); | |
746 | if (r) { | |
747 | c->max++; | |
748 | c->openmax = 1; | |
749 | } else | |
750 | c->openmax = (a->openmax || b->openmax); | |
751 | c->integer = 0; | |
752 | } | |
753 | ||
754 | /** | |
755 | * snd_interval_mulkdiv - refine the interval value | |
df8db936 TI |
756 | * @a: dividend 1 |
757 | * @k: dividend 2 (as integer) | |
758 | * @b: divisor | |
759 | * @c: result | |
1da177e4 LT |
760 | * |
761 | * c = a * k / b | |
762 | * | |
763 | * Returns non-zero if the value is changed, zero if not changed. | |
764 | */ | |
877211f5 TI |
765 | void snd_interval_mulkdiv(const struct snd_interval *a, unsigned int k, |
766 | const struct snd_interval *b, struct snd_interval *c) | |
1da177e4 LT |
767 | { |
768 | unsigned int r; | |
769 | if (a->empty || b->empty) { | |
770 | snd_interval_none(c); | |
771 | return; | |
772 | } | |
773 | c->empty = 0; | |
774 | c->min = muldiv32(a->min, k, b->max, &r); | |
775 | c->openmin = (r || a->openmin || b->openmax); | |
776 | if (b->min > 0) { | |
777 | c->max = muldiv32(a->max, k, b->min, &r); | |
778 | if (r) { | |
779 | c->max++; | |
780 | c->openmax = 1; | |
781 | } else | |
782 | c->openmax = (a->openmax || b->openmin); | |
783 | } else { | |
784 | c->max = UINT_MAX; | |
785 | c->openmax = 0; | |
786 | } | |
787 | c->integer = 0; | |
788 | } | |
789 | ||
1da177e4 LT |
790 | /* ---- */ |
791 | ||
792 | ||
793 | /** | |
794 | * snd_interval_ratnum - refine the interval value | |
df8db936 TI |
795 | * @i: interval to refine |
796 | * @rats_count: number of ratnum_t | |
797 | * @rats: ratnum_t array | |
798 | * @nump: pointer to store the resultant numerator | |
799 | * @denp: pointer to store the resultant denominator | |
1da177e4 | 800 | * |
eb7c06e8 YB |
801 | * Return: Positive if the value is changed, zero if it's not changed, or a |
802 | * negative error code. | |
1da177e4 | 803 | */ |
877211f5 | 804 | int snd_interval_ratnum(struct snd_interval *i, |
e5e113cf | 805 | unsigned int rats_count, const struct snd_ratnum *rats, |
877211f5 | 806 | unsigned int *nump, unsigned int *denp) |
1da177e4 | 807 | { |
8374e24c KH |
808 | unsigned int best_num, best_den; |
809 | int best_diff; | |
1da177e4 | 810 | unsigned int k; |
877211f5 | 811 | struct snd_interval t; |
1da177e4 | 812 | int err; |
8374e24c KH |
813 | unsigned int result_num, result_den; |
814 | int result_diff; | |
1da177e4 LT |
815 | |
816 | best_num = best_den = best_diff = 0; | |
817 | for (k = 0; k < rats_count; ++k) { | |
818 | unsigned int num = rats[k].num; | |
819 | unsigned int den; | |
820 | unsigned int q = i->min; | |
821 | int diff; | |
822 | if (q == 0) | |
823 | q = 1; | |
40962d7c | 824 | den = div_up(num, q); |
1da177e4 LT |
825 | if (den < rats[k].den_min) |
826 | continue; | |
827 | if (den > rats[k].den_max) | |
828 | den = rats[k].den_max; | |
829 | else { | |
830 | unsigned int r; | |
831 | r = (den - rats[k].den_min) % rats[k].den_step; | |
832 | if (r != 0) | |
833 | den -= r; | |
834 | } | |
835 | diff = num - q * den; | |
8374e24c KH |
836 | if (diff < 0) |
837 | diff = -diff; | |
1da177e4 LT |
838 | if (best_num == 0 || |
839 | diff * best_den < best_diff * den) { | |
840 | best_diff = diff; | |
841 | best_den = den; | |
842 | best_num = num; | |
843 | } | |
844 | } | |
845 | if (best_den == 0) { | |
846 | i->empty = 1; | |
847 | return -EINVAL; | |
848 | } | |
849 | t.min = div_down(best_num, best_den); | |
850 | t.openmin = !!(best_num % best_den); | |
851 | ||
8374e24c KH |
852 | result_num = best_num; |
853 | result_diff = best_diff; | |
854 | result_den = best_den; | |
1da177e4 LT |
855 | best_num = best_den = best_diff = 0; |
856 | for (k = 0; k < rats_count; ++k) { | |
857 | unsigned int num = rats[k].num; | |
858 | unsigned int den; | |
859 | unsigned int q = i->max; | |
860 | int diff; | |
861 | if (q == 0) { | |
862 | i->empty = 1; | |
863 | return -EINVAL; | |
864 | } | |
40962d7c | 865 | den = div_down(num, q); |
1da177e4 LT |
866 | if (den > rats[k].den_max) |
867 | continue; | |
868 | if (den < rats[k].den_min) | |
869 | den = rats[k].den_min; | |
870 | else { | |
871 | unsigned int r; | |
872 | r = (den - rats[k].den_min) % rats[k].den_step; | |
873 | if (r != 0) | |
874 | den += rats[k].den_step - r; | |
875 | } | |
876 | diff = q * den - num; | |
8374e24c KH |
877 | if (diff < 0) |
878 | diff = -diff; | |
1da177e4 LT |
879 | if (best_num == 0 || |
880 | diff * best_den < best_diff * den) { | |
881 | best_diff = diff; | |
882 | best_den = den; | |
883 | best_num = num; | |
884 | } | |
885 | } | |
886 | if (best_den == 0) { | |
887 | i->empty = 1; | |
888 | return -EINVAL; | |
889 | } | |
890 | t.max = div_up(best_num, best_den); | |
891 | t.openmax = !!(best_num % best_den); | |
892 | t.integer = 0; | |
893 | err = snd_interval_refine(i, &t); | |
894 | if (err < 0) | |
895 | return err; | |
896 | ||
897 | if (snd_interval_single(i)) { | |
8374e24c KH |
898 | if (best_diff * result_den < result_diff * best_den) { |
899 | result_num = best_num; | |
900 | result_den = best_den; | |
901 | } | |
1da177e4 | 902 | if (nump) |
8374e24c | 903 | *nump = result_num; |
1da177e4 | 904 | if (denp) |
8374e24c | 905 | *denp = result_den; |
1da177e4 LT |
906 | } |
907 | return err; | |
908 | } | |
909 | ||
e88e8ae6 TI |
910 | EXPORT_SYMBOL(snd_interval_ratnum); |
911 | ||
1da177e4 LT |
912 | /** |
913 | * snd_interval_ratden - refine the interval value | |
df8db936 | 914 | * @i: interval to refine |
877211f5 TI |
915 | * @rats_count: number of struct ratden |
916 | * @rats: struct ratden array | |
df8db936 TI |
917 | * @nump: pointer to store the resultant numerator |
918 | * @denp: pointer to store the resultant denominator | |
1da177e4 | 919 | * |
eb7c06e8 YB |
920 | * Return: Positive if the value is changed, zero if it's not changed, or a |
921 | * negative error code. | |
1da177e4 | 922 | */ |
877211f5 | 923 | static int snd_interval_ratden(struct snd_interval *i, |
e5e113cf LPC |
924 | unsigned int rats_count, |
925 | const struct snd_ratden *rats, | |
1da177e4 LT |
926 | unsigned int *nump, unsigned int *denp) |
927 | { | |
928 | unsigned int best_num, best_diff, best_den; | |
929 | unsigned int k; | |
877211f5 | 930 | struct snd_interval t; |
1da177e4 LT |
931 | int err; |
932 | ||
933 | best_num = best_den = best_diff = 0; | |
934 | for (k = 0; k < rats_count; ++k) { | |
935 | unsigned int num; | |
936 | unsigned int den = rats[k].den; | |
937 | unsigned int q = i->min; | |
938 | int diff; | |
939 | num = mul(q, den); | |
940 | if (num > rats[k].num_max) | |
941 | continue; | |
942 | if (num < rats[k].num_min) | |
943 | num = rats[k].num_max; | |
944 | else { | |
945 | unsigned int r; | |
946 | r = (num - rats[k].num_min) % rats[k].num_step; | |
947 | if (r != 0) | |
948 | num += rats[k].num_step - r; | |
949 | } | |
950 | diff = num - q * den; | |
951 | if (best_num == 0 || | |
952 | diff * best_den < best_diff * den) { | |
953 | best_diff = diff; | |
954 | best_den = den; | |
955 | best_num = num; | |
956 | } | |
957 | } | |
958 | if (best_den == 0) { | |
959 | i->empty = 1; | |
960 | return -EINVAL; | |
961 | } | |
962 | t.min = div_down(best_num, best_den); | |
963 | t.openmin = !!(best_num % best_den); | |
964 | ||
965 | best_num = best_den = best_diff = 0; | |
966 | for (k = 0; k < rats_count; ++k) { | |
967 | unsigned int num; | |
968 | unsigned int den = rats[k].den; | |
969 | unsigned int q = i->max; | |
970 | int diff; | |
971 | num = mul(q, den); | |
972 | if (num < rats[k].num_min) | |
973 | continue; | |
974 | if (num > rats[k].num_max) | |
975 | num = rats[k].num_max; | |
976 | else { | |
977 | unsigned int r; | |
978 | r = (num - rats[k].num_min) % rats[k].num_step; | |
979 | if (r != 0) | |
980 | num -= r; | |
981 | } | |
982 | diff = q * den - num; | |
983 | if (best_num == 0 || | |
984 | diff * best_den < best_diff * den) { | |
985 | best_diff = diff; | |
986 | best_den = den; | |
987 | best_num = num; | |
988 | } | |
989 | } | |
990 | if (best_den == 0) { | |
991 | i->empty = 1; | |
992 | return -EINVAL; | |
993 | } | |
994 | t.max = div_up(best_num, best_den); | |
995 | t.openmax = !!(best_num % best_den); | |
996 | t.integer = 0; | |
997 | err = snd_interval_refine(i, &t); | |
998 | if (err < 0) | |
999 | return err; | |
1000 | ||
1001 | if (snd_interval_single(i)) { | |
1002 | if (nump) | |
1003 | *nump = best_num; | |
1004 | if (denp) | |
1005 | *denp = best_den; | |
1006 | } | |
1007 | return err; | |
1008 | } | |
1009 | ||
1010 | /** | |
1011 | * snd_interval_list - refine the interval value from the list | |
1012 | * @i: the interval value to refine | |
1013 | * @count: the number of elements in the list | |
1014 | * @list: the value list | |
1015 | * @mask: the bit-mask to evaluate | |
1016 | * | |
1017 | * Refines the interval value from the list. | |
1018 | * When mask is non-zero, only the elements corresponding to bit 1 are | |
1019 | * evaluated. | |
1020 | * | |
eb7c06e8 YB |
1021 | * Return: Positive if the value is changed, zero if it's not changed, or a |
1022 | * negative error code. | |
1da177e4 | 1023 | */ |
4af87a93 MB |
1024 | int snd_interval_list(struct snd_interval *i, unsigned int count, |
1025 | const unsigned int *list, unsigned int mask) | |
1da177e4 LT |
1026 | { |
1027 | unsigned int k; | |
b1ddaf68 | 1028 | struct snd_interval list_range; |
0981a260 TI |
1029 | |
1030 | if (!count) { | |
1031 | i->empty = 1; | |
1032 | return -EINVAL; | |
1033 | } | |
b1ddaf68 CL |
1034 | snd_interval_any(&list_range); |
1035 | list_range.min = UINT_MAX; | |
1036 | list_range.max = 0; | |
1da177e4 LT |
1037 | for (k = 0; k < count; k++) { |
1038 | if (mask && !(mask & (1 << k))) | |
1039 | continue; | |
b1ddaf68 | 1040 | if (!snd_interval_test(i, list[k])) |
1da177e4 | 1041 | continue; |
b1ddaf68 CL |
1042 | list_range.min = min(list_range.min, list[k]); |
1043 | list_range.max = max(list_range.max, list[k]); | |
1da177e4 | 1044 | } |
b1ddaf68 | 1045 | return snd_interval_refine(i, &list_range); |
1da177e4 LT |
1046 | } |
1047 | ||
e88e8ae6 TI |
1048 | EXPORT_SYMBOL(snd_interval_list); |
1049 | ||
f66f898e PR |
1050 | /** |
1051 | * snd_interval_ranges - refine the interval value from the list of ranges | |
1052 | * @i: the interval value to refine | |
1053 | * @count: the number of elements in the list of ranges | |
1054 | * @ranges: the ranges list | |
1055 | * @mask: the bit-mask to evaluate | |
1056 | * | |
1057 | * Refines the interval value from the list of ranges. | |
1058 | * When mask is non-zero, only the elements corresponding to bit 1 are | |
1059 | * evaluated. | |
1060 | * | |
1061 | * Return: Positive if the value is changed, zero if it's not changed, or a | |
1062 | * negative error code. | |
1063 | */ | |
1064 | int snd_interval_ranges(struct snd_interval *i, unsigned int count, | |
1065 | const struct snd_interval *ranges, unsigned int mask) | |
1066 | { | |
1067 | unsigned int k; | |
1068 | struct snd_interval range_union; | |
1069 | struct snd_interval range; | |
1070 | ||
1071 | if (!count) { | |
1072 | snd_interval_none(i); | |
1073 | return -EINVAL; | |
1074 | } | |
1075 | snd_interval_any(&range_union); | |
1076 | range_union.min = UINT_MAX; | |
1077 | range_union.max = 0; | |
1078 | for (k = 0; k < count; k++) { | |
1079 | if (mask && !(mask & (1 << k))) | |
1080 | continue; | |
1081 | snd_interval_copy(&range, &ranges[k]); | |
1082 | if (snd_interval_refine(&range, i) < 0) | |
1083 | continue; | |
1084 | if (snd_interval_empty(&range)) | |
1085 | continue; | |
1086 | ||
1087 | if (range.min < range_union.min) { | |
1088 | range_union.min = range.min; | |
1089 | range_union.openmin = 1; | |
1090 | } | |
1091 | if (range.min == range_union.min && !range.openmin) | |
1092 | range_union.openmin = 0; | |
1093 | if (range.max > range_union.max) { | |
1094 | range_union.max = range.max; | |
1095 | range_union.openmax = 1; | |
1096 | } | |
1097 | if (range.max == range_union.max && !range.openmax) | |
1098 | range_union.openmax = 0; | |
1099 | } | |
1100 | return snd_interval_refine(i, &range_union); | |
1101 | } | |
1102 | EXPORT_SYMBOL(snd_interval_ranges); | |
1103 | ||
0f519b62 | 1104 | static int snd_interval_step(struct snd_interval *i, unsigned int step) |
1da177e4 LT |
1105 | { |
1106 | unsigned int n; | |
1107 | int changed = 0; | |
0f519b62 | 1108 | n = i->min % step; |
1da177e4 LT |
1109 | if (n != 0 || i->openmin) { |
1110 | i->min += step - n; | |
df1e4719 | 1111 | i->openmin = 0; |
1da177e4 LT |
1112 | changed = 1; |
1113 | } | |
0f519b62 | 1114 | n = i->max % step; |
1da177e4 LT |
1115 | if (n != 0 || i->openmax) { |
1116 | i->max -= n; | |
df1e4719 | 1117 | i->openmax = 0; |
1da177e4 LT |
1118 | changed = 1; |
1119 | } | |
1120 | if (snd_interval_checkempty(i)) { | |
1121 | i->empty = 1; | |
1122 | return -EINVAL; | |
1123 | } | |
1124 | return changed; | |
1125 | } | |
1126 | ||
1127 | /* Info constraints helpers */ | |
1128 | ||
1129 | /** | |
1130 | * snd_pcm_hw_rule_add - add the hw-constraint rule | |
1131 | * @runtime: the pcm runtime instance | |
1132 | * @cond: condition bits | |
1133 | * @var: the variable to evaluate | |
1134 | * @func: the evaluation function | |
1135 | * @private: the private data pointer passed to function | |
1136 | * @dep: the dependent variables | |
1137 | * | |
eb7c06e8 | 1138 | * Return: Zero if successful, or a negative error code on failure. |
1da177e4 | 1139 | */ |
877211f5 | 1140 | int snd_pcm_hw_rule_add(struct snd_pcm_runtime *runtime, unsigned int cond, |
1da177e4 LT |
1141 | int var, |
1142 | snd_pcm_hw_rule_func_t func, void *private, | |
1143 | int dep, ...) | |
1144 | { | |
877211f5 TI |
1145 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; |
1146 | struct snd_pcm_hw_rule *c; | |
1da177e4 LT |
1147 | unsigned int k; |
1148 | va_list args; | |
1149 | va_start(args, dep); | |
1150 | if (constrs->rules_num >= constrs->rules_all) { | |
877211f5 | 1151 | struct snd_pcm_hw_rule *new; |
1da177e4 LT |
1152 | unsigned int new_rules = constrs->rules_all + 16; |
1153 | new = kcalloc(new_rules, sizeof(*c), GFP_KERNEL); | |
87a1c8aa JJ |
1154 | if (!new) { |
1155 | va_end(args); | |
1da177e4 | 1156 | return -ENOMEM; |
87a1c8aa | 1157 | } |
1da177e4 LT |
1158 | if (constrs->rules) { |
1159 | memcpy(new, constrs->rules, | |
1160 | constrs->rules_num * sizeof(*c)); | |
1161 | kfree(constrs->rules); | |
1162 | } | |
1163 | constrs->rules = new; | |
1164 | constrs->rules_all = new_rules; | |
1165 | } | |
1166 | c = &constrs->rules[constrs->rules_num]; | |
1167 | c->cond = cond; | |
1168 | c->func = func; | |
1169 | c->var = var; | |
1170 | c->private = private; | |
1171 | k = 0; | |
1172 | while (1) { | |
87a1c8aa JJ |
1173 | if (snd_BUG_ON(k >= ARRAY_SIZE(c->deps))) { |
1174 | va_end(args); | |
7eaa943c | 1175 | return -EINVAL; |
87a1c8aa | 1176 | } |
1da177e4 LT |
1177 | c->deps[k++] = dep; |
1178 | if (dep < 0) | |
1179 | break; | |
1180 | dep = va_arg(args, int); | |
1181 | } | |
1182 | constrs->rules_num++; | |
1183 | va_end(args); | |
1184 | return 0; | |
87a1c8aa | 1185 | } |
1da177e4 | 1186 | |
e88e8ae6 TI |
1187 | EXPORT_SYMBOL(snd_pcm_hw_rule_add); |
1188 | ||
1da177e4 | 1189 | /** |
1c85cc64 | 1190 | * snd_pcm_hw_constraint_mask - apply the given bitmap mask constraint |
df8db936 TI |
1191 | * @runtime: PCM runtime instance |
1192 | * @var: hw_params variable to apply the mask | |
1193 | * @mask: the bitmap mask | |
1194 | * | |
1c85cc64 | 1195 | * Apply the constraint of the given bitmap mask to a 32-bit mask parameter. |
eb7c06e8 YB |
1196 | * |
1197 | * Return: Zero if successful, or a negative error code on failure. | |
1da177e4 | 1198 | */ |
877211f5 | 1199 | int snd_pcm_hw_constraint_mask(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, |
1da177e4 LT |
1200 | u_int32_t mask) |
1201 | { | |
877211f5 TI |
1202 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; |
1203 | struct snd_mask *maskp = constrs_mask(constrs, var); | |
1da177e4 LT |
1204 | *maskp->bits &= mask; |
1205 | memset(maskp->bits + 1, 0, (SNDRV_MASK_MAX-32) / 8); /* clear rest */ | |
1206 | if (*maskp->bits == 0) | |
1207 | return -EINVAL; | |
1208 | return 0; | |
1209 | } | |
1210 | ||
1211 | /** | |
1c85cc64 | 1212 | * snd_pcm_hw_constraint_mask64 - apply the given bitmap mask constraint |
df8db936 TI |
1213 | * @runtime: PCM runtime instance |
1214 | * @var: hw_params variable to apply the mask | |
1215 | * @mask: the 64bit bitmap mask | |
1216 | * | |
1c85cc64 | 1217 | * Apply the constraint of the given bitmap mask to a 64-bit mask parameter. |
eb7c06e8 YB |
1218 | * |
1219 | * Return: Zero if successful, or a negative error code on failure. | |
1da177e4 | 1220 | */ |
877211f5 | 1221 | int snd_pcm_hw_constraint_mask64(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, |
1da177e4 LT |
1222 | u_int64_t mask) |
1223 | { | |
877211f5 TI |
1224 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; |
1225 | struct snd_mask *maskp = constrs_mask(constrs, var); | |
1da177e4 LT |
1226 | maskp->bits[0] &= (u_int32_t)mask; |
1227 | maskp->bits[1] &= (u_int32_t)(mask >> 32); | |
1228 | memset(maskp->bits + 2, 0, (SNDRV_MASK_MAX-64) / 8); /* clear rest */ | |
1229 | if (! maskp->bits[0] && ! maskp->bits[1]) | |
1230 | return -EINVAL; | |
1231 | return 0; | |
1232 | } | |
63a5d4c6 | 1233 | EXPORT_SYMBOL(snd_pcm_hw_constraint_mask64); |
1da177e4 LT |
1234 | |
1235 | /** | |
1c85cc64 | 1236 | * snd_pcm_hw_constraint_integer - apply an integer constraint to an interval |
df8db936 TI |
1237 | * @runtime: PCM runtime instance |
1238 | * @var: hw_params variable to apply the integer constraint | |
1239 | * | |
1240 | * Apply the constraint of integer to an interval parameter. | |
eb7c06e8 YB |
1241 | * |
1242 | * Return: Positive if the value is changed, zero if it's not changed, or a | |
1243 | * negative error code. | |
1da177e4 | 1244 | */ |
877211f5 | 1245 | int snd_pcm_hw_constraint_integer(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var) |
1da177e4 | 1246 | { |
877211f5 | 1247 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; |
1da177e4 LT |
1248 | return snd_interval_setinteger(constrs_interval(constrs, var)); |
1249 | } | |
1250 | ||
e88e8ae6 TI |
1251 | EXPORT_SYMBOL(snd_pcm_hw_constraint_integer); |
1252 | ||
1da177e4 | 1253 | /** |
1c85cc64 | 1254 | * snd_pcm_hw_constraint_minmax - apply a min/max range constraint to an interval |
df8db936 TI |
1255 | * @runtime: PCM runtime instance |
1256 | * @var: hw_params variable to apply the range | |
1257 | * @min: the minimal value | |
1258 | * @max: the maximal value | |
1259 | * | |
1260 | * Apply the min/max range constraint to an interval parameter. | |
eb7c06e8 YB |
1261 | * |
1262 | * Return: Positive if the value is changed, zero if it's not changed, or a | |
1263 | * negative error code. | |
1da177e4 | 1264 | */ |
877211f5 | 1265 | int snd_pcm_hw_constraint_minmax(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, |
1da177e4 LT |
1266 | unsigned int min, unsigned int max) |
1267 | { | |
877211f5 TI |
1268 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; |
1269 | struct snd_interval t; | |
1da177e4 LT |
1270 | t.min = min; |
1271 | t.max = max; | |
1272 | t.openmin = t.openmax = 0; | |
1273 | t.integer = 0; | |
1274 | return snd_interval_refine(constrs_interval(constrs, var), &t); | |
1275 | } | |
1276 | ||
e88e8ae6 TI |
1277 | EXPORT_SYMBOL(snd_pcm_hw_constraint_minmax); |
1278 | ||
877211f5 TI |
1279 | static int snd_pcm_hw_rule_list(struct snd_pcm_hw_params *params, |
1280 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 1281 | { |
877211f5 | 1282 | struct snd_pcm_hw_constraint_list *list = rule->private; |
1da177e4 LT |
1283 | return snd_interval_list(hw_param_interval(params, rule->var), list->count, list->list, list->mask); |
1284 | } | |
1285 | ||
1286 | ||
1287 | /** | |
1c85cc64 | 1288 | * snd_pcm_hw_constraint_list - apply a list of constraints to a parameter |
df8db936 TI |
1289 | * @runtime: PCM runtime instance |
1290 | * @cond: condition bits | |
1291 | * @var: hw_params variable to apply the list constraint | |
1292 | * @l: list | |
1293 | * | |
1294 | * Apply the list of constraints to an interval parameter. | |
eb7c06e8 YB |
1295 | * |
1296 | * Return: Zero if successful, or a negative error code on failure. | |
1da177e4 | 1297 | */ |
877211f5 | 1298 | int snd_pcm_hw_constraint_list(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1299 | unsigned int cond, |
1300 | snd_pcm_hw_param_t var, | |
1464189f | 1301 | const struct snd_pcm_hw_constraint_list *l) |
1da177e4 LT |
1302 | { |
1303 | return snd_pcm_hw_rule_add(runtime, cond, var, | |
1464189f | 1304 | snd_pcm_hw_rule_list, (void *)l, |
1da177e4 LT |
1305 | var, -1); |
1306 | } | |
1307 | ||
e88e8ae6 TI |
1308 | EXPORT_SYMBOL(snd_pcm_hw_constraint_list); |
1309 | ||
f66f898e PR |
1310 | static int snd_pcm_hw_rule_ranges(struct snd_pcm_hw_params *params, |
1311 | struct snd_pcm_hw_rule *rule) | |
1312 | { | |
1313 | struct snd_pcm_hw_constraint_ranges *r = rule->private; | |
1314 | return snd_interval_ranges(hw_param_interval(params, rule->var), | |
1315 | r->count, r->ranges, r->mask); | |
1316 | } | |
1317 | ||
1318 | ||
1319 | /** | |
1320 | * snd_pcm_hw_constraint_ranges - apply list of range constraints to a parameter | |
1321 | * @runtime: PCM runtime instance | |
1322 | * @cond: condition bits | |
1323 | * @var: hw_params variable to apply the list of range constraints | |
1324 | * @r: ranges | |
1325 | * | |
1326 | * Apply the list of range constraints to an interval parameter. | |
1327 | * | |
1328 | * Return: Zero if successful, or a negative error code on failure. | |
1329 | */ | |
1330 | int snd_pcm_hw_constraint_ranges(struct snd_pcm_runtime *runtime, | |
1331 | unsigned int cond, | |
1332 | snd_pcm_hw_param_t var, | |
1333 | const struct snd_pcm_hw_constraint_ranges *r) | |
1334 | { | |
1335 | return snd_pcm_hw_rule_add(runtime, cond, var, | |
1336 | snd_pcm_hw_rule_ranges, (void *)r, | |
1337 | var, -1); | |
1338 | } | |
1339 | EXPORT_SYMBOL(snd_pcm_hw_constraint_ranges); | |
1340 | ||
877211f5 TI |
1341 | static int snd_pcm_hw_rule_ratnums(struct snd_pcm_hw_params *params, |
1342 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 1343 | { |
e5e113cf | 1344 | const struct snd_pcm_hw_constraint_ratnums *r = rule->private; |
1da177e4 LT |
1345 | unsigned int num = 0, den = 0; |
1346 | int err; | |
1347 | err = snd_interval_ratnum(hw_param_interval(params, rule->var), | |
1348 | r->nrats, r->rats, &num, &den); | |
1349 | if (err >= 0 && den && rule->var == SNDRV_PCM_HW_PARAM_RATE) { | |
1350 | params->rate_num = num; | |
1351 | params->rate_den = den; | |
1352 | } | |
1353 | return err; | |
1354 | } | |
1355 | ||
1356 | /** | |
1c85cc64 | 1357 | * snd_pcm_hw_constraint_ratnums - apply ratnums constraint to a parameter |
df8db936 TI |
1358 | * @runtime: PCM runtime instance |
1359 | * @cond: condition bits | |
1360 | * @var: hw_params variable to apply the ratnums constraint | |
877211f5 | 1361 | * @r: struct snd_ratnums constriants |
eb7c06e8 YB |
1362 | * |
1363 | * Return: Zero if successful, or a negative error code on failure. | |
1da177e4 | 1364 | */ |
877211f5 | 1365 | int snd_pcm_hw_constraint_ratnums(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1366 | unsigned int cond, |
1367 | snd_pcm_hw_param_t var, | |
e5e113cf | 1368 | const struct snd_pcm_hw_constraint_ratnums *r) |
1da177e4 LT |
1369 | { |
1370 | return snd_pcm_hw_rule_add(runtime, cond, var, | |
e5e113cf | 1371 | snd_pcm_hw_rule_ratnums, (void *)r, |
1da177e4 LT |
1372 | var, -1); |
1373 | } | |
1374 | ||
e88e8ae6 TI |
1375 | EXPORT_SYMBOL(snd_pcm_hw_constraint_ratnums); |
1376 | ||
877211f5 TI |
1377 | static int snd_pcm_hw_rule_ratdens(struct snd_pcm_hw_params *params, |
1378 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 1379 | { |
e5e113cf | 1380 | const struct snd_pcm_hw_constraint_ratdens *r = rule->private; |
1da177e4 LT |
1381 | unsigned int num = 0, den = 0; |
1382 | int err = snd_interval_ratden(hw_param_interval(params, rule->var), | |
1383 | r->nrats, r->rats, &num, &den); | |
1384 | if (err >= 0 && den && rule->var == SNDRV_PCM_HW_PARAM_RATE) { | |
1385 | params->rate_num = num; | |
1386 | params->rate_den = den; | |
1387 | } | |
1388 | return err; | |
1389 | } | |
1390 | ||
1391 | /** | |
1c85cc64 | 1392 | * snd_pcm_hw_constraint_ratdens - apply ratdens constraint to a parameter |
df8db936 TI |
1393 | * @runtime: PCM runtime instance |
1394 | * @cond: condition bits | |
1395 | * @var: hw_params variable to apply the ratdens constraint | |
877211f5 | 1396 | * @r: struct snd_ratdens constriants |
eb7c06e8 YB |
1397 | * |
1398 | * Return: Zero if successful, or a negative error code on failure. | |
1da177e4 | 1399 | */ |
877211f5 | 1400 | int snd_pcm_hw_constraint_ratdens(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1401 | unsigned int cond, |
1402 | snd_pcm_hw_param_t var, | |
e5e113cf | 1403 | const struct snd_pcm_hw_constraint_ratdens *r) |
1da177e4 LT |
1404 | { |
1405 | return snd_pcm_hw_rule_add(runtime, cond, var, | |
e5e113cf | 1406 | snd_pcm_hw_rule_ratdens, (void *)r, |
1da177e4 LT |
1407 | var, -1); |
1408 | } | |
1409 | ||
e88e8ae6 TI |
1410 | EXPORT_SYMBOL(snd_pcm_hw_constraint_ratdens); |
1411 | ||
877211f5 TI |
1412 | static int snd_pcm_hw_rule_msbits(struct snd_pcm_hw_params *params, |
1413 | struct snd_pcm_hw_rule *rule) | |
1da177e4 LT |
1414 | { |
1415 | unsigned int l = (unsigned long) rule->private; | |
1416 | int width = l & 0xffff; | |
1417 | unsigned int msbits = l >> 16; | |
877211f5 | 1418 | struct snd_interval *i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS); |
8ef9df55 LPC |
1419 | |
1420 | if (!snd_interval_single(i)) | |
1421 | return 0; | |
1422 | ||
1423 | if ((snd_interval_value(i) == width) || | |
1424 | (width == 0 && snd_interval_value(i) > msbits)) | |
19f52fae | 1425 | params->msbits = min_not_zero(params->msbits, msbits); |
8ef9df55 | 1426 | |
1da177e4 LT |
1427 | return 0; |
1428 | } | |
1429 | ||
1430 | /** | |
1c85cc64 | 1431 | * snd_pcm_hw_constraint_msbits - add a hw constraint msbits rule |
df8db936 TI |
1432 | * @runtime: PCM runtime instance |
1433 | * @cond: condition bits | |
1434 | * @width: sample bits width | |
1435 | * @msbits: msbits width | |
eb7c06e8 | 1436 | * |
8ef9df55 LPC |
1437 | * This constraint will set the number of most significant bits (msbits) if a |
1438 | * sample format with the specified width has been select. If width is set to 0 | |
1439 | * the msbits will be set for any sample format with a width larger than the | |
1440 | * specified msbits. | |
1441 | * | |
eb7c06e8 | 1442 | * Return: Zero if successful, or a negative error code on failure. |
1da177e4 | 1443 | */ |
877211f5 | 1444 | int snd_pcm_hw_constraint_msbits(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1445 | unsigned int cond, |
1446 | unsigned int width, | |
1447 | unsigned int msbits) | |
1448 | { | |
1449 | unsigned long l = (msbits << 16) | width; | |
1450 | return snd_pcm_hw_rule_add(runtime, cond, -1, | |
1451 | snd_pcm_hw_rule_msbits, | |
1452 | (void*) l, | |
1453 | SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); | |
1454 | } | |
1455 | ||
e88e8ae6 TI |
1456 | EXPORT_SYMBOL(snd_pcm_hw_constraint_msbits); |
1457 | ||
877211f5 TI |
1458 | static int snd_pcm_hw_rule_step(struct snd_pcm_hw_params *params, |
1459 | struct snd_pcm_hw_rule *rule) | |
1da177e4 LT |
1460 | { |
1461 | unsigned long step = (unsigned long) rule->private; | |
0f519b62 | 1462 | return snd_interval_step(hw_param_interval(params, rule->var), step); |
1da177e4 LT |
1463 | } |
1464 | ||
1465 | /** | |
1c85cc64 | 1466 | * snd_pcm_hw_constraint_step - add a hw constraint step rule |
df8db936 TI |
1467 | * @runtime: PCM runtime instance |
1468 | * @cond: condition bits | |
1469 | * @var: hw_params variable to apply the step constraint | |
1470 | * @step: step size | |
eb7c06e8 YB |
1471 | * |
1472 | * Return: Zero if successful, or a negative error code on failure. | |
1da177e4 | 1473 | */ |
877211f5 | 1474 | int snd_pcm_hw_constraint_step(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1475 | unsigned int cond, |
1476 | snd_pcm_hw_param_t var, | |
1477 | unsigned long step) | |
1478 | { | |
1479 | return snd_pcm_hw_rule_add(runtime, cond, var, | |
1480 | snd_pcm_hw_rule_step, (void *) step, | |
1481 | var, -1); | |
1482 | } | |
1483 | ||
e88e8ae6 TI |
1484 | EXPORT_SYMBOL(snd_pcm_hw_constraint_step); |
1485 | ||
877211f5 | 1486 | static int snd_pcm_hw_rule_pow2(struct snd_pcm_hw_params *params, struct snd_pcm_hw_rule *rule) |
1da177e4 | 1487 | { |
67c39317 | 1488 | static unsigned int pow2_sizes[] = { |
1da177e4 LT |
1489 | 1<<0, 1<<1, 1<<2, 1<<3, 1<<4, 1<<5, 1<<6, 1<<7, |
1490 | 1<<8, 1<<9, 1<<10, 1<<11, 1<<12, 1<<13, 1<<14, 1<<15, | |
1491 | 1<<16, 1<<17, 1<<18, 1<<19, 1<<20, 1<<21, 1<<22, 1<<23, | |
1492 | 1<<24, 1<<25, 1<<26, 1<<27, 1<<28, 1<<29, 1<<30 | |
1493 | }; | |
1494 | return snd_interval_list(hw_param_interval(params, rule->var), | |
1495 | ARRAY_SIZE(pow2_sizes), pow2_sizes, 0); | |
1496 | } | |
1497 | ||
1498 | /** | |
1c85cc64 | 1499 | * snd_pcm_hw_constraint_pow2 - add a hw constraint power-of-2 rule |
df8db936 TI |
1500 | * @runtime: PCM runtime instance |
1501 | * @cond: condition bits | |
1502 | * @var: hw_params variable to apply the power-of-2 constraint | |
eb7c06e8 YB |
1503 | * |
1504 | * Return: Zero if successful, or a negative error code on failure. | |
1da177e4 | 1505 | */ |
877211f5 | 1506 | int snd_pcm_hw_constraint_pow2(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1507 | unsigned int cond, |
1508 | snd_pcm_hw_param_t var) | |
1509 | { | |
1510 | return snd_pcm_hw_rule_add(runtime, cond, var, | |
1511 | snd_pcm_hw_rule_pow2, NULL, | |
1512 | var, -1); | |
1513 | } | |
1514 | ||
e88e8ae6 TI |
1515 | EXPORT_SYMBOL(snd_pcm_hw_constraint_pow2); |
1516 | ||
d5b702a6 CL |
1517 | static int snd_pcm_hw_rule_noresample_func(struct snd_pcm_hw_params *params, |
1518 | struct snd_pcm_hw_rule *rule) | |
1519 | { | |
1520 | unsigned int base_rate = (unsigned int)(uintptr_t)rule->private; | |
1521 | struct snd_interval *rate; | |
1522 | ||
1523 | rate = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE); | |
1524 | return snd_interval_list(rate, 1, &base_rate, 0); | |
1525 | } | |
1526 | ||
1527 | /** | |
1528 | * snd_pcm_hw_rule_noresample - add a rule to allow disabling hw resampling | |
1529 | * @runtime: PCM runtime instance | |
1530 | * @base_rate: the rate at which the hardware does not resample | |
eb7c06e8 YB |
1531 | * |
1532 | * Return: Zero if successful, or a negative error code on failure. | |
d5b702a6 CL |
1533 | */ |
1534 | int snd_pcm_hw_rule_noresample(struct snd_pcm_runtime *runtime, | |
1535 | unsigned int base_rate) | |
1536 | { | |
1537 | return snd_pcm_hw_rule_add(runtime, SNDRV_PCM_HW_PARAMS_NORESAMPLE, | |
1538 | SNDRV_PCM_HW_PARAM_RATE, | |
1539 | snd_pcm_hw_rule_noresample_func, | |
1540 | (void *)(uintptr_t)base_rate, | |
1541 | SNDRV_PCM_HW_PARAM_RATE, -1); | |
1542 | } | |
1543 | EXPORT_SYMBOL(snd_pcm_hw_rule_noresample); | |
1544 | ||
877211f5 | 1545 | static void _snd_pcm_hw_param_any(struct snd_pcm_hw_params *params, |
123992f7 | 1546 | snd_pcm_hw_param_t var) |
1da177e4 LT |
1547 | { |
1548 | if (hw_is_mask(var)) { | |
1549 | snd_mask_any(hw_param_mask(params, var)); | |
1550 | params->cmask |= 1 << var; | |
1551 | params->rmask |= 1 << var; | |
1552 | return; | |
1553 | } | |
1554 | if (hw_is_interval(var)) { | |
1555 | snd_interval_any(hw_param_interval(params, var)); | |
1556 | params->cmask |= 1 << var; | |
1557 | params->rmask |= 1 << var; | |
1558 | return; | |
1559 | } | |
1560 | snd_BUG(); | |
1561 | } | |
1562 | ||
877211f5 | 1563 | void _snd_pcm_hw_params_any(struct snd_pcm_hw_params *params) |
1da177e4 LT |
1564 | { |
1565 | unsigned int k; | |
1566 | memset(params, 0, sizeof(*params)); | |
1567 | for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) | |
1568 | _snd_pcm_hw_param_any(params, k); | |
1569 | for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) | |
1570 | _snd_pcm_hw_param_any(params, k); | |
1571 | params->info = ~0U; | |
1572 | } | |
1573 | ||
e88e8ae6 | 1574 | EXPORT_SYMBOL(_snd_pcm_hw_params_any); |
1da177e4 LT |
1575 | |
1576 | /** | |
1c85cc64 | 1577 | * snd_pcm_hw_param_value - return @params field @var value |
df8db936 TI |
1578 | * @params: the hw_params instance |
1579 | * @var: parameter to retrieve | |
1c85cc64 | 1580 | * @dir: pointer to the direction (-1,0,1) or %NULL |
1da177e4 | 1581 | * |
eb7c06e8 YB |
1582 | * Return: The value for field @var if it's fixed in configuration space |
1583 | * defined by @params. -%EINVAL otherwise. | |
1da177e4 | 1584 | */ |
e88e8ae6 TI |
1585 | int snd_pcm_hw_param_value(const struct snd_pcm_hw_params *params, |
1586 | snd_pcm_hw_param_t var, int *dir) | |
1da177e4 LT |
1587 | { |
1588 | if (hw_is_mask(var)) { | |
877211f5 | 1589 | const struct snd_mask *mask = hw_param_mask_c(params, var); |
1da177e4 LT |
1590 | if (!snd_mask_single(mask)) |
1591 | return -EINVAL; | |
1592 | if (dir) | |
1593 | *dir = 0; | |
1594 | return snd_mask_value(mask); | |
1595 | } | |
1596 | if (hw_is_interval(var)) { | |
877211f5 | 1597 | const struct snd_interval *i = hw_param_interval_c(params, var); |
1da177e4 LT |
1598 | if (!snd_interval_single(i)) |
1599 | return -EINVAL; | |
1600 | if (dir) | |
1601 | *dir = i->openmin; | |
1602 | return snd_interval_value(i); | |
1603 | } | |
1da177e4 LT |
1604 | return -EINVAL; |
1605 | } | |
1606 | ||
e88e8ae6 | 1607 | EXPORT_SYMBOL(snd_pcm_hw_param_value); |
1da177e4 | 1608 | |
877211f5 | 1609 | void _snd_pcm_hw_param_setempty(struct snd_pcm_hw_params *params, |
1da177e4 LT |
1610 | snd_pcm_hw_param_t var) |
1611 | { | |
1612 | if (hw_is_mask(var)) { | |
1613 | snd_mask_none(hw_param_mask(params, var)); | |
1614 | params->cmask |= 1 << var; | |
1615 | params->rmask |= 1 << var; | |
1616 | } else if (hw_is_interval(var)) { | |
1617 | snd_interval_none(hw_param_interval(params, var)); | |
1618 | params->cmask |= 1 << var; | |
1619 | params->rmask |= 1 << var; | |
1620 | } else { | |
1621 | snd_BUG(); | |
1622 | } | |
1623 | } | |
1624 | ||
e88e8ae6 | 1625 | EXPORT_SYMBOL(_snd_pcm_hw_param_setempty); |
1da177e4 | 1626 | |
877211f5 | 1627 | static int _snd_pcm_hw_param_first(struct snd_pcm_hw_params *params, |
123992f7 | 1628 | snd_pcm_hw_param_t var) |
1da177e4 LT |
1629 | { |
1630 | int changed; | |
1631 | if (hw_is_mask(var)) | |
1632 | changed = snd_mask_refine_first(hw_param_mask(params, var)); | |
1633 | else if (hw_is_interval(var)) | |
1634 | changed = snd_interval_refine_first(hw_param_interval(params, var)); | |
2f4ca8e5 | 1635 | else |
1da177e4 | 1636 | return -EINVAL; |
1da177e4 LT |
1637 | if (changed) { |
1638 | params->cmask |= 1 << var; | |
1639 | params->rmask |= 1 << var; | |
1640 | } | |
1641 | return changed; | |
1642 | } | |
1643 | ||
1644 | ||
1645 | /** | |
1c85cc64 | 1646 | * snd_pcm_hw_param_first - refine config space and return minimum value |
df8db936 TI |
1647 | * @pcm: PCM instance |
1648 | * @params: the hw_params instance | |
1649 | * @var: parameter to retrieve | |
1c85cc64 | 1650 | * @dir: pointer to the direction (-1,0,1) or %NULL |
1da177e4 | 1651 | * |
1c85cc64 | 1652 | * Inside configuration space defined by @params remove from @var all |
1da177e4 | 1653 | * values > minimum. Reduce configuration space accordingly. |
eb7c06e8 YB |
1654 | * |
1655 | * Return: The minimum, or a negative error code on failure. | |
1da177e4 | 1656 | */ |
e88e8ae6 TI |
1657 | int snd_pcm_hw_param_first(struct snd_pcm_substream *pcm, |
1658 | struct snd_pcm_hw_params *params, | |
1659 | snd_pcm_hw_param_t var, int *dir) | |
1da177e4 LT |
1660 | { |
1661 | int changed = _snd_pcm_hw_param_first(params, var); | |
1662 | if (changed < 0) | |
1663 | return changed; | |
1664 | if (params->rmask) { | |
1665 | int err = snd_pcm_hw_refine(pcm, params); | |
7eaa943c TI |
1666 | if (snd_BUG_ON(err < 0)) |
1667 | return err; | |
1da177e4 LT |
1668 | } |
1669 | return snd_pcm_hw_param_value(params, var, dir); | |
1670 | } | |
1671 | ||
e88e8ae6 TI |
1672 | EXPORT_SYMBOL(snd_pcm_hw_param_first); |
1673 | ||
877211f5 | 1674 | static int _snd_pcm_hw_param_last(struct snd_pcm_hw_params *params, |
123992f7 | 1675 | snd_pcm_hw_param_t var) |
1da177e4 LT |
1676 | { |
1677 | int changed; | |
1678 | if (hw_is_mask(var)) | |
1679 | changed = snd_mask_refine_last(hw_param_mask(params, var)); | |
1680 | else if (hw_is_interval(var)) | |
1681 | changed = snd_interval_refine_last(hw_param_interval(params, var)); | |
2f4ca8e5 | 1682 | else |
1da177e4 | 1683 | return -EINVAL; |
1da177e4 LT |
1684 | if (changed) { |
1685 | params->cmask |= 1 << var; | |
1686 | params->rmask |= 1 << var; | |
1687 | } | |
1688 | return changed; | |
1689 | } | |
1690 | ||
1691 | ||
1692 | /** | |
1c85cc64 | 1693 | * snd_pcm_hw_param_last - refine config space and return maximum value |
df8db936 TI |
1694 | * @pcm: PCM instance |
1695 | * @params: the hw_params instance | |
1696 | * @var: parameter to retrieve | |
1c85cc64 | 1697 | * @dir: pointer to the direction (-1,0,1) or %NULL |
1da177e4 | 1698 | * |
1c85cc64 | 1699 | * Inside configuration space defined by @params remove from @var all |
1da177e4 | 1700 | * values < maximum. Reduce configuration space accordingly. |
eb7c06e8 YB |
1701 | * |
1702 | * Return: The maximum, or a negative error code on failure. | |
1da177e4 | 1703 | */ |
e88e8ae6 TI |
1704 | int snd_pcm_hw_param_last(struct snd_pcm_substream *pcm, |
1705 | struct snd_pcm_hw_params *params, | |
1706 | snd_pcm_hw_param_t var, int *dir) | |
1da177e4 LT |
1707 | { |
1708 | int changed = _snd_pcm_hw_param_last(params, var); | |
1709 | if (changed < 0) | |
1710 | return changed; | |
1711 | if (params->rmask) { | |
1712 | int err = snd_pcm_hw_refine(pcm, params); | |
7eaa943c TI |
1713 | if (snd_BUG_ON(err < 0)) |
1714 | return err; | |
1da177e4 LT |
1715 | } |
1716 | return snd_pcm_hw_param_value(params, var, dir); | |
1717 | } | |
1718 | ||
e88e8ae6 | 1719 | EXPORT_SYMBOL(snd_pcm_hw_param_last); |
1da177e4 LT |
1720 | |
1721 | /** | |
1c85cc64 | 1722 | * snd_pcm_hw_param_choose - choose a configuration defined by @params |
df8db936 TI |
1723 | * @pcm: PCM instance |
1724 | * @params: the hw_params instance | |
1da177e4 | 1725 | * |
1c85cc64 | 1726 | * Choose one configuration from configuration space defined by @params. |
1da177e4 LT |
1727 | * The configuration chosen is that obtained fixing in this order: |
1728 | * first access, first format, first subformat, min channels, | |
1729 | * min rate, min period time, max buffer size, min tick time | |
eb7c06e8 YB |
1730 | * |
1731 | * Return: Zero if successful, or a negative error code on failure. | |
1da177e4 | 1732 | */ |
2f4ca8e5 TI |
1733 | int snd_pcm_hw_params_choose(struct snd_pcm_substream *pcm, |
1734 | struct snd_pcm_hw_params *params) | |
1da177e4 | 1735 | { |
2f4ca8e5 TI |
1736 | static int vars[] = { |
1737 | SNDRV_PCM_HW_PARAM_ACCESS, | |
1738 | SNDRV_PCM_HW_PARAM_FORMAT, | |
1739 | SNDRV_PCM_HW_PARAM_SUBFORMAT, | |
1740 | SNDRV_PCM_HW_PARAM_CHANNELS, | |
1741 | SNDRV_PCM_HW_PARAM_RATE, | |
1742 | SNDRV_PCM_HW_PARAM_PERIOD_TIME, | |
1743 | SNDRV_PCM_HW_PARAM_BUFFER_SIZE, | |
1744 | SNDRV_PCM_HW_PARAM_TICK_TIME, | |
1745 | -1 | |
1746 | }; | |
1747 | int err, *v; | |
1da177e4 | 1748 | |
2f4ca8e5 TI |
1749 | for (v = vars; *v != -1; v++) { |
1750 | if (*v != SNDRV_PCM_HW_PARAM_BUFFER_SIZE) | |
1751 | err = snd_pcm_hw_param_first(pcm, params, *v, NULL); | |
1752 | else | |
1753 | err = snd_pcm_hw_param_last(pcm, params, *v, NULL); | |
7eaa943c TI |
1754 | if (snd_BUG_ON(err < 0)) |
1755 | return err; | |
2f4ca8e5 | 1756 | } |
1da177e4 LT |
1757 | return 0; |
1758 | } | |
1759 | ||
877211f5 | 1760 | static int snd_pcm_lib_ioctl_reset(struct snd_pcm_substream *substream, |
1da177e4 LT |
1761 | void *arg) |
1762 | { | |
877211f5 | 1763 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1764 | unsigned long flags; |
1765 | snd_pcm_stream_lock_irqsave(substream, flags); | |
1766 | if (snd_pcm_running(substream) && | |
1767 | snd_pcm_update_hw_ptr(substream) >= 0) | |
1768 | runtime->status->hw_ptr %= runtime->buffer_size; | |
0e8014d7 | 1769 | else { |
1da177e4 | 1770 | runtime->status->hw_ptr = 0; |
0e8014d7 PLB |
1771 | runtime->hw_ptr_wrap = 0; |
1772 | } | |
1da177e4 LT |
1773 | snd_pcm_stream_unlock_irqrestore(substream, flags); |
1774 | return 0; | |
1775 | } | |
1776 | ||
877211f5 | 1777 | static int snd_pcm_lib_ioctl_channel_info(struct snd_pcm_substream *substream, |
1da177e4 LT |
1778 | void *arg) |
1779 | { | |
877211f5 TI |
1780 | struct snd_pcm_channel_info *info = arg; |
1781 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1da177e4 LT |
1782 | int width; |
1783 | if (!(runtime->info & SNDRV_PCM_INFO_MMAP)) { | |
1784 | info->offset = -1; | |
1785 | return 0; | |
1786 | } | |
1787 | width = snd_pcm_format_physical_width(runtime->format); | |
1788 | if (width < 0) | |
1789 | return width; | |
1790 | info->offset = 0; | |
1791 | switch (runtime->access) { | |
1792 | case SNDRV_PCM_ACCESS_MMAP_INTERLEAVED: | |
1793 | case SNDRV_PCM_ACCESS_RW_INTERLEAVED: | |
1794 | info->first = info->channel * width; | |
1795 | info->step = runtime->channels * width; | |
1796 | break; | |
1797 | case SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED: | |
1798 | case SNDRV_PCM_ACCESS_RW_NONINTERLEAVED: | |
1799 | { | |
1800 | size_t size = runtime->dma_bytes / runtime->channels; | |
1801 | info->first = info->channel * size * 8; | |
1802 | info->step = width; | |
1803 | break; | |
1804 | } | |
1805 | default: | |
1806 | snd_BUG(); | |
1807 | break; | |
1808 | } | |
1809 | return 0; | |
1810 | } | |
1811 | ||
8bea869c JK |
1812 | static int snd_pcm_lib_ioctl_fifo_size(struct snd_pcm_substream *substream, |
1813 | void *arg) | |
1814 | { | |
1815 | struct snd_pcm_hw_params *params = arg; | |
1816 | snd_pcm_format_t format; | |
a9960e6a CL |
1817 | int channels; |
1818 | ssize_t frame_size; | |
8bea869c JK |
1819 | |
1820 | params->fifo_size = substream->runtime->hw.fifo_size; | |
1821 | if (!(substream->runtime->hw.info & SNDRV_PCM_INFO_FIFO_IN_FRAMES)) { | |
1822 | format = params_format(params); | |
1823 | channels = params_channels(params); | |
a9960e6a CL |
1824 | frame_size = snd_pcm_format_size(format, channels); |
1825 | if (frame_size > 0) | |
1826 | params->fifo_size /= (unsigned)frame_size; | |
8bea869c JK |
1827 | } |
1828 | return 0; | |
1829 | } | |
1830 | ||
1da177e4 LT |
1831 | /** |
1832 | * snd_pcm_lib_ioctl - a generic PCM ioctl callback | |
1833 | * @substream: the pcm substream instance | |
1834 | * @cmd: ioctl command | |
1835 | * @arg: ioctl argument | |
1836 | * | |
1837 | * Processes the generic ioctl commands for PCM. | |
1838 | * Can be passed as the ioctl callback for PCM ops. | |
1839 | * | |
eb7c06e8 | 1840 | * Return: Zero if successful, or a negative error code on failure. |
1da177e4 | 1841 | */ |
877211f5 | 1842 | int snd_pcm_lib_ioctl(struct snd_pcm_substream *substream, |
1da177e4 LT |
1843 | unsigned int cmd, void *arg) |
1844 | { | |
1845 | switch (cmd) { | |
1846 | case SNDRV_PCM_IOCTL1_INFO: | |
1847 | return 0; | |
1848 | case SNDRV_PCM_IOCTL1_RESET: | |
1849 | return snd_pcm_lib_ioctl_reset(substream, arg); | |
1850 | case SNDRV_PCM_IOCTL1_CHANNEL_INFO: | |
1851 | return snd_pcm_lib_ioctl_channel_info(substream, arg); | |
8bea869c JK |
1852 | case SNDRV_PCM_IOCTL1_FIFO_SIZE: |
1853 | return snd_pcm_lib_ioctl_fifo_size(substream, arg); | |
1da177e4 LT |
1854 | } |
1855 | return -ENXIO; | |
1856 | } | |
1857 | ||
e88e8ae6 TI |
1858 | EXPORT_SYMBOL(snd_pcm_lib_ioctl); |
1859 | ||
1da177e4 LT |
1860 | /** |
1861 | * snd_pcm_period_elapsed - update the pcm status for the next period | |
1862 | * @substream: the pcm substream instance | |
1863 | * | |
1864 | * This function is called from the interrupt handler when the | |
1865 | * PCM has processed the period size. It will update the current | |
31e8960b | 1866 | * pointer, wake up sleepers, etc. |
1da177e4 LT |
1867 | * |
1868 | * Even if more than one periods have elapsed since the last call, you | |
1869 | * have to call this only once. | |
1870 | */ | |
877211f5 | 1871 | void snd_pcm_period_elapsed(struct snd_pcm_substream *substream) |
1da177e4 | 1872 | { |
877211f5 | 1873 | struct snd_pcm_runtime *runtime; |
1da177e4 LT |
1874 | unsigned long flags; |
1875 | ||
7eaa943c TI |
1876 | if (PCM_RUNTIME_CHECK(substream)) |
1877 | return; | |
1da177e4 | 1878 | runtime = substream->runtime; |
1da177e4 | 1879 | |
1da177e4 LT |
1880 | snd_pcm_stream_lock_irqsave(substream, flags); |
1881 | if (!snd_pcm_running(substream) || | |
f240406b | 1882 | snd_pcm_update_hw_ptr0(substream, 1) < 0) |
1da177e4 LT |
1883 | goto _end; |
1884 | ||
90bbaf66 | 1885 | #ifdef CONFIG_SND_PCM_TIMER |
1da177e4 LT |
1886 | if (substream->timer_running) |
1887 | snd_timer_interrupt(substream->timer, 1); | |
90bbaf66 | 1888 | #endif |
1da177e4 | 1889 | _end: |
1da177e4 | 1890 | kill_fasync(&runtime->fasync, SIGIO, POLL_IN); |
3aa02cb6 | 1891 | snd_pcm_stream_unlock_irqrestore(substream, flags); |
1da177e4 LT |
1892 | } |
1893 | ||
e88e8ae6 TI |
1894 | EXPORT_SYMBOL(snd_pcm_period_elapsed); |
1895 | ||
13075510 TI |
1896 | /* |
1897 | * Wait until avail_min data becomes available | |
1898 | * Returns a negative error code if any error occurs during operation. | |
1899 | * The available space is stored on availp. When err = 0 and avail = 0 | |
1900 | * on the capture stream, it indicates the stream is in DRAINING state. | |
1901 | */ | |
5daeba34 | 1902 | static int wait_for_avail(struct snd_pcm_substream *substream, |
13075510 TI |
1903 | snd_pcm_uframes_t *availp) |
1904 | { | |
1905 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1906 | int is_playback = substream->stream == SNDRV_PCM_STREAM_PLAYBACK; | |
ac6424b9 | 1907 | wait_queue_entry_t wait; |
13075510 TI |
1908 | int err = 0; |
1909 | snd_pcm_uframes_t avail = 0; | |
f2b3614c TI |
1910 | long wait_time, tout; |
1911 | ||
763437a9 AV |
1912 | init_waitqueue_entry(&wait, current); |
1913 | set_current_state(TASK_INTERRUPTIBLE); | |
1914 | add_wait_queue(&runtime->tsleep, &wait); | |
1915 | ||
f2b3614c TI |
1916 | if (runtime->no_period_wakeup) |
1917 | wait_time = MAX_SCHEDULE_TIMEOUT; | |
1918 | else { | |
1919 | wait_time = 10; | |
1920 | if (runtime->rate) { | |
1921 | long t = runtime->period_size * 2 / runtime->rate; | |
1922 | wait_time = max(t, wait_time); | |
1923 | } | |
1924 | wait_time = msecs_to_jiffies(wait_time * 1000); | |
1925 | } | |
763437a9 | 1926 | |
13075510 TI |
1927 | for (;;) { |
1928 | if (signal_pending(current)) { | |
1929 | err = -ERESTARTSYS; | |
1930 | break; | |
1931 | } | |
763437a9 AV |
1932 | |
1933 | /* | |
1934 | * We need to check if space became available already | |
1935 | * (and thus the wakeup happened already) first to close | |
1936 | * the race of space already having become available. | |
1937 | * This check must happen after been added to the waitqueue | |
1938 | * and having current state be INTERRUPTIBLE. | |
1939 | */ | |
1940 | if (is_playback) | |
1941 | avail = snd_pcm_playback_avail(runtime); | |
1942 | else | |
1943 | avail = snd_pcm_capture_avail(runtime); | |
1944 | if (avail >= runtime->twake) | |
1945 | break; | |
13075510 | 1946 | snd_pcm_stream_unlock_irq(substream); |
763437a9 AV |
1947 | |
1948 | tout = schedule_timeout(wait_time); | |
1949 | ||
13075510 | 1950 | snd_pcm_stream_lock_irq(substream); |
763437a9 | 1951 | set_current_state(TASK_INTERRUPTIBLE); |
13075510 TI |
1952 | switch (runtime->status->state) { |
1953 | case SNDRV_PCM_STATE_SUSPENDED: | |
1954 | err = -ESTRPIPE; | |
1955 | goto _endloop; | |
1956 | case SNDRV_PCM_STATE_XRUN: | |
1957 | err = -EPIPE; | |
1958 | goto _endloop; | |
1959 | case SNDRV_PCM_STATE_DRAINING: | |
1960 | if (is_playback) | |
1961 | err = -EPIPE; | |
1962 | else | |
1963 | avail = 0; /* indicate draining */ | |
1964 | goto _endloop; | |
1965 | case SNDRV_PCM_STATE_OPEN: | |
1966 | case SNDRV_PCM_STATE_SETUP: | |
1967 | case SNDRV_PCM_STATE_DISCONNECTED: | |
1968 | err = -EBADFD; | |
1969 | goto _endloop; | |
ed697e1a JK |
1970 | case SNDRV_PCM_STATE_PAUSED: |
1971 | continue; | |
13075510 TI |
1972 | } |
1973 | if (!tout) { | |
09e56df8 TI |
1974 | pcm_dbg(substream->pcm, |
1975 | "%s write error (DMA or IRQ trouble?)\n", | |
1976 | is_playback ? "playback" : "capture"); | |
13075510 TI |
1977 | err = -EIO; |
1978 | break; | |
1979 | } | |
13075510 TI |
1980 | } |
1981 | _endloop: | |
763437a9 | 1982 | set_current_state(TASK_RUNNING); |
c91a988d | 1983 | remove_wait_queue(&runtime->tsleep, &wait); |
13075510 TI |
1984 | *availp = avail; |
1985 | return err; | |
1986 | } | |
1987 | ||
877211f5 | 1988 | static int snd_pcm_lib_write_transfer(struct snd_pcm_substream *substream, |
1da177e4 LT |
1989 | unsigned int hwoff, |
1990 | unsigned long data, unsigned int off, | |
1991 | snd_pcm_uframes_t frames) | |
1992 | { | |
877211f5 | 1993 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1994 | int err; |
1995 | char __user *buf = (char __user *) data + frames_to_bytes(runtime, off); | |
1996 | if (substream->ops->copy) { | |
1997 | if ((err = substream->ops->copy(substream, -1, hwoff, buf, frames)) < 0) | |
1998 | return err; | |
1999 | } else { | |
2000 | char *hwbuf = runtime->dma_area + frames_to_bytes(runtime, hwoff); | |
1da177e4 LT |
2001 | if (copy_from_user(hwbuf, buf, frames_to_bytes(runtime, frames))) |
2002 | return -EFAULT; | |
2003 | } | |
2004 | return 0; | |
2005 | } | |
2006 | ||
877211f5 | 2007 | typedef int (*transfer_f)(struct snd_pcm_substream *substream, unsigned int hwoff, |
1da177e4 LT |
2008 | unsigned long data, unsigned int off, |
2009 | snd_pcm_uframes_t size); | |
2010 | ||
877211f5 | 2011 | static snd_pcm_sframes_t snd_pcm_lib_write1(struct snd_pcm_substream *substream, |
1da177e4 LT |
2012 | unsigned long data, |
2013 | snd_pcm_uframes_t size, | |
2014 | int nonblock, | |
2015 | transfer_f transfer) | |
2016 | { | |
877211f5 | 2017 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
2018 | snd_pcm_uframes_t xfer = 0; |
2019 | snd_pcm_uframes_t offset = 0; | |
0910c216 | 2020 | snd_pcm_uframes_t avail; |
1da177e4 LT |
2021 | int err = 0; |
2022 | ||
2023 | if (size == 0) | |
2024 | return 0; | |
1da177e4 LT |
2025 | |
2026 | snd_pcm_stream_lock_irq(substream); | |
2027 | switch (runtime->status->state) { | |
2028 | case SNDRV_PCM_STATE_PREPARED: | |
2029 | case SNDRV_PCM_STATE_RUNNING: | |
2030 | case SNDRV_PCM_STATE_PAUSED: | |
2031 | break; | |
2032 | case SNDRV_PCM_STATE_XRUN: | |
2033 | err = -EPIPE; | |
2034 | goto _end_unlock; | |
2035 | case SNDRV_PCM_STATE_SUSPENDED: | |
2036 | err = -ESTRPIPE; | |
2037 | goto _end_unlock; | |
2038 | default: | |
2039 | err = -EBADFD; | |
2040 | goto _end_unlock; | |
2041 | } | |
2042 | ||
5daeba34 | 2043 | runtime->twake = runtime->control->avail_min ? : 1; |
0910c216 TI |
2044 | if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) |
2045 | snd_pcm_update_hw_ptr(substream); | |
2046 | avail = snd_pcm_playback_avail(runtime); | |
1da177e4 LT |
2047 | while (size > 0) { |
2048 | snd_pcm_uframes_t frames, appl_ptr, appl_ofs; | |
1da177e4 | 2049 | snd_pcm_uframes_t cont; |
13075510 | 2050 | if (!avail) { |
1da177e4 LT |
2051 | if (nonblock) { |
2052 | err = -EAGAIN; | |
2053 | goto _end_unlock; | |
2054 | } | |
5daeba34 DD |
2055 | runtime->twake = min_t(snd_pcm_uframes_t, size, |
2056 | runtime->control->avail_min ? : 1); | |
2057 | err = wait_for_avail(substream, &avail); | |
13075510 | 2058 | if (err < 0) |
443feb88 | 2059 | goto _end_unlock; |
1da177e4 | 2060 | } |
1da177e4 LT |
2061 | frames = size > avail ? avail : size; |
2062 | cont = runtime->buffer_size - runtime->control->appl_ptr % runtime->buffer_size; | |
2063 | if (frames > cont) | |
2064 | frames = cont; | |
7eaa943c | 2065 | if (snd_BUG_ON(!frames)) { |
c91a988d | 2066 | runtime->twake = 0; |
7eaa943c TI |
2067 | snd_pcm_stream_unlock_irq(substream); |
2068 | return -EINVAL; | |
2069 | } | |
1da177e4 LT |
2070 | appl_ptr = runtime->control->appl_ptr; |
2071 | appl_ofs = appl_ptr % runtime->buffer_size; | |
2072 | snd_pcm_stream_unlock_irq(substream); | |
1250932e | 2073 | err = transfer(substream, appl_ofs, data, offset, frames); |
1da177e4 | 2074 | snd_pcm_stream_lock_irq(substream); |
1250932e JK |
2075 | if (err < 0) |
2076 | goto _end_unlock; | |
1da177e4 LT |
2077 | switch (runtime->status->state) { |
2078 | case SNDRV_PCM_STATE_XRUN: | |
2079 | err = -EPIPE; | |
2080 | goto _end_unlock; | |
2081 | case SNDRV_PCM_STATE_SUSPENDED: | |
2082 | err = -ESTRPIPE; | |
2083 | goto _end_unlock; | |
2084 | default: | |
2085 | break; | |
2086 | } | |
2087 | appl_ptr += frames; | |
2088 | if (appl_ptr >= runtime->boundary) | |
2089 | appl_ptr -= runtime->boundary; | |
2090 | runtime->control->appl_ptr = appl_ptr; | |
2091 | if (substream->ops->ack) | |
2092 | substream->ops->ack(substream); | |
2093 | ||
2094 | offset += frames; | |
2095 | size -= frames; | |
2096 | xfer += frames; | |
0910c216 | 2097 | avail -= frames; |
1da177e4 LT |
2098 | if (runtime->status->state == SNDRV_PCM_STATE_PREPARED && |
2099 | snd_pcm_playback_hw_avail(runtime) >= (snd_pcm_sframes_t)runtime->start_threshold) { | |
2100 | err = snd_pcm_start(substream); | |
2101 | if (err < 0) | |
2102 | goto _end_unlock; | |
2103 | } | |
1da177e4 LT |
2104 | } |
2105 | _end_unlock: | |
c91a988d | 2106 | runtime->twake = 0; |
1250932e JK |
2107 | if (xfer > 0 && err >= 0) |
2108 | snd_pcm_update_state(substream, runtime); | |
1da177e4 | 2109 | snd_pcm_stream_unlock_irq(substream); |
1da177e4 LT |
2110 | return xfer > 0 ? (snd_pcm_sframes_t)xfer : err; |
2111 | } | |
2112 | ||
7eaa943c TI |
2113 | /* sanity-check for read/write methods */ |
2114 | static int pcm_sanity_check(struct snd_pcm_substream *substream) | |
1da177e4 | 2115 | { |
877211f5 | 2116 | struct snd_pcm_runtime *runtime; |
7eaa943c TI |
2117 | if (PCM_RUNTIME_CHECK(substream)) |
2118 | return -ENXIO; | |
1da177e4 | 2119 | runtime = substream->runtime; |
7eaa943c TI |
2120 | if (snd_BUG_ON(!substream->ops->copy && !runtime->dma_area)) |
2121 | return -EINVAL; | |
1da177e4 LT |
2122 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) |
2123 | return -EBADFD; | |
7eaa943c TI |
2124 | return 0; |
2125 | } | |
2126 | ||
2127 | snd_pcm_sframes_t snd_pcm_lib_write(struct snd_pcm_substream *substream, const void __user *buf, snd_pcm_uframes_t size) | |
2128 | { | |
2129 | struct snd_pcm_runtime *runtime; | |
2130 | int nonblock; | |
2131 | int err; | |
1da177e4 | 2132 | |
7eaa943c TI |
2133 | err = pcm_sanity_check(substream); |
2134 | if (err < 0) | |
2135 | return err; | |
2136 | runtime = substream->runtime; | |
0df63e44 | 2137 | nonblock = !!(substream->f_flags & O_NONBLOCK); |
1da177e4 LT |
2138 | |
2139 | if (runtime->access != SNDRV_PCM_ACCESS_RW_INTERLEAVED && | |
2140 | runtime->channels > 1) | |
2141 | return -EINVAL; | |
2142 | return snd_pcm_lib_write1(substream, (unsigned long)buf, size, nonblock, | |
2143 | snd_pcm_lib_write_transfer); | |
2144 | } | |
2145 | ||
e88e8ae6 TI |
2146 | EXPORT_SYMBOL(snd_pcm_lib_write); |
2147 | ||
877211f5 | 2148 | static int snd_pcm_lib_writev_transfer(struct snd_pcm_substream *substream, |
1da177e4 LT |
2149 | unsigned int hwoff, |
2150 | unsigned long data, unsigned int off, | |
2151 | snd_pcm_uframes_t frames) | |
2152 | { | |
877211f5 | 2153 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
2154 | int err; |
2155 | void __user **bufs = (void __user **)data; | |
2156 | int channels = runtime->channels; | |
2157 | int c; | |
2158 | if (substream->ops->copy) { | |
7eaa943c TI |
2159 | if (snd_BUG_ON(!substream->ops->silence)) |
2160 | return -EINVAL; | |
1da177e4 LT |
2161 | for (c = 0; c < channels; ++c, ++bufs) { |
2162 | if (*bufs == NULL) { | |
2163 | if ((err = substream->ops->silence(substream, c, hwoff, frames)) < 0) | |
2164 | return err; | |
2165 | } else { | |
2166 | char __user *buf = *bufs + samples_to_bytes(runtime, off); | |
2167 | if ((err = substream->ops->copy(substream, c, hwoff, buf, frames)) < 0) | |
2168 | return err; | |
2169 | } | |
2170 | } | |
2171 | } else { | |
2172 | /* default transfer behaviour */ | |
2173 | size_t dma_csize = runtime->dma_bytes / channels; | |
1da177e4 LT |
2174 | for (c = 0; c < channels; ++c, ++bufs) { |
2175 | char *hwbuf = runtime->dma_area + (c * dma_csize) + samples_to_bytes(runtime, hwoff); | |
2176 | if (*bufs == NULL) { | |
2177 | snd_pcm_format_set_silence(runtime->format, hwbuf, frames); | |
2178 | } else { | |
2179 | char __user *buf = *bufs + samples_to_bytes(runtime, off); | |
2180 | if (copy_from_user(hwbuf, buf, samples_to_bytes(runtime, frames))) | |
2181 | return -EFAULT; | |
2182 | } | |
2183 | } | |
2184 | } | |
2185 | return 0; | |
2186 | } | |
2187 | ||
877211f5 | 2188 | snd_pcm_sframes_t snd_pcm_lib_writev(struct snd_pcm_substream *substream, |
1da177e4 LT |
2189 | void __user **bufs, |
2190 | snd_pcm_uframes_t frames) | |
2191 | { | |
877211f5 | 2192 | struct snd_pcm_runtime *runtime; |
1da177e4 | 2193 | int nonblock; |
7eaa943c | 2194 | int err; |
1da177e4 | 2195 | |
7eaa943c TI |
2196 | err = pcm_sanity_check(substream); |
2197 | if (err < 0) | |
2198 | return err; | |
1da177e4 | 2199 | runtime = substream->runtime; |
0df63e44 | 2200 | nonblock = !!(substream->f_flags & O_NONBLOCK); |
1da177e4 LT |
2201 | |
2202 | if (runtime->access != SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) | |
2203 | return -EINVAL; | |
2204 | return snd_pcm_lib_write1(substream, (unsigned long)bufs, frames, | |
2205 | nonblock, snd_pcm_lib_writev_transfer); | |
2206 | } | |
2207 | ||
e88e8ae6 TI |
2208 | EXPORT_SYMBOL(snd_pcm_lib_writev); |
2209 | ||
877211f5 | 2210 | static int snd_pcm_lib_read_transfer(struct snd_pcm_substream *substream, |
1da177e4 LT |
2211 | unsigned int hwoff, |
2212 | unsigned long data, unsigned int off, | |
2213 | snd_pcm_uframes_t frames) | |
2214 | { | |
877211f5 | 2215 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
2216 | int err; |
2217 | char __user *buf = (char __user *) data + frames_to_bytes(runtime, off); | |
2218 | if (substream->ops->copy) { | |
2219 | if ((err = substream->ops->copy(substream, -1, hwoff, buf, frames)) < 0) | |
2220 | return err; | |
2221 | } else { | |
2222 | char *hwbuf = runtime->dma_area + frames_to_bytes(runtime, hwoff); | |
1da177e4 LT |
2223 | if (copy_to_user(buf, hwbuf, frames_to_bytes(runtime, frames))) |
2224 | return -EFAULT; | |
2225 | } | |
2226 | return 0; | |
2227 | } | |
2228 | ||
877211f5 | 2229 | static snd_pcm_sframes_t snd_pcm_lib_read1(struct snd_pcm_substream *substream, |
1da177e4 LT |
2230 | unsigned long data, |
2231 | snd_pcm_uframes_t size, | |
2232 | int nonblock, | |
2233 | transfer_f transfer) | |
2234 | { | |
877211f5 | 2235 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
2236 | snd_pcm_uframes_t xfer = 0; |
2237 | snd_pcm_uframes_t offset = 0; | |
0910c216 | 2238 | snd_pcm_uframes_t avail; |
1da177e4 LT |
2239 | int err = 0; |
2240 | ||
2241 | if (size == 0) | |
2242 | return 0; | |
1da177e4 LT |
2243 | |
2244 | snd_pcm_stream_lock_irq(substream); | |
2245 | switch (runtime->status->state) { | |
2246 | case SNDRV_PCM_STATE_PREPARED: | |
2247 | if (size >= runtime->start_threshold) { | |
2248 | err = snd_pcm_start(substream); | |
2249 | if (err < 0) | |
2250 | goto _end_unlock; | |
2251 | } | |
2252 | break; | |
2253 | case SNDRV_PCM_STATE_DRAINING: | |
2254 | case SNDRV_PCM_STATE_RUNNING: | |
2255 | case SNDRV_PCM_STATE_PAUSED: | |
2256 | break; | |
2257 | case SNDRV_PCM_STATE_XRUN: | |
2258 | err = -EPIPE; | |
2259 | goto _end_unlock; | |
2260 | case SNDRV_PCM_STATE_SUSPENDED: | |
2261 | err = -ESTRPIPE; | |
2262 | goto _end_unlock; | |
2263 | default: | |
2264 | err = -EBADFD; | |
2265 | goto _end_unlock; | |
2266 | } | |
2267 | ||
5daeba34 | 2268 | runtime->twake = runtime->control->avail_min ? : 1; |
0910c216 TI |
2269 | if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) |
2270 | snd_pcm_update_hw_ptr(substream); | |
2271 | avail = snd_pcm_capture_avail(runtime); | |
1da177e4 LT |
2272 | while (size > 0) { |
2273 | snd_pcm_uframes_t frames, appl_ptr, appl_ofs; | |
1da177e4 | 2274 | snd_pcm_uframes_t cont; |
13075510 TI |
2275 | if (!avail) { |
2276 | if (runtime->status->state == | |
2277 | SNDRV_PCM_STATE_DRAINING) { | |
2278 | snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP); | |
1da177e4 LT |
2279 | goto _end_unlock; |
2280 | } | |
1da177e4 LT |
2281 | if (nonblock) { |
2282 | err = -EAGAIN; | |
2283 | goto _end_unlock; | |
2284 | } | |
5daeba34 DD |
2285 | runtime->twake = min_t(snd_pcm_uframes_t, size, |
2286 | runtime->control->avail_min ? : 1); | |
2287 | err = wait_for_avail(substream, &avail); | |
13075510 | 2288 | if (err < 0) |
443feb88 | 2289 | goto _end_unlock; |
13075510 TI |
2290 | if (!avail) |
2291 | continue; /* draining */ | |
1da177e4 | 2292 | } |
1da177e4 LT |
2293 | frames = size > avail ? avail : size; |
2294 | cont = runtime->buffer_size - runtime->control->appl_ptr % runtime->buffer_size; | |
2295 | if (frames > cont) | |
2296 | frames = cont; | |
7eaa943c | 2297 | if (snd_BUG_ON(!frames)) { |
c91a988d | 2298 | runtime->twake = 0; |
7eaa943c TI |
2299 | snd_pcm_stream_unlock_irq(substream); |
2300 | return -EINVAL; | |
2301 | } | |
1da177e4 LT |
2302 | appl_ptr = runtime->control->appl_ptr; |
2303 | appl_ofs = appl_ptr % runtime->buffer_size; | |
2304 | snd_pcm_stream_unlock_irq(substream); | |
1250932e | 2305 | err = transfer(substream, appl_ofs, data, offset, frames); |
1da177e4 | 2306 | snd_pcm_stream_lock_irq(substream); |
1250932e JK |
2307 | if (err < 0) |
2308 | goto _end_unlock; | |
1da177e4 LT |
2309 | switch (runtime->status->state) { |
2310 | case SNDRV_PCM_STATE_XRUN: | |
2311 | err = -EPIPE; | |
2312 | goto _end_unlock; | |
2313 | case SNDRV_PCM_STATE_SUSPENDED: | |
2314 | err = -ESTRPIPE; | |
2315 | goto _end_unlock; | |
2316 | default: | |
2317 | break; | |
2318 | } | |
2319 | appl_ptr += frames; | |
2320 | if (appl_ptr >= runtime->boundary) | |
2321 | appl_ptr -= runtime->boundary; | |
2322 | runtime->control->appl_ptr = appl_ptr; | |
2323 | if (substream->ops->ack) | |
2324 | substream->ops->ack(substream); | |
2325 | ||
2326 | offset += frames; | |
2327 | size -= frames; | |
2328 | xfer += frames; | |
0910c216 | 2329 | avail -= frames; |
1da177e4 LT |
2330 | } |
2331 | _end_unlock: | |
c91a988d | 2332 | runtime->twake = 0; |
1250932e JK |
2333 | if (xfer > 0 && err >= 0) |
2334 | snd_pcm_update_state(substream, runtime); | |
1da177e4 | 2335 | snd_pcm_stream_unlock_irq(substream); |
1da177e4 LT |
2336 | return xfer > 0 ? (snd_pcm_sframes_t)xfer : err; |
2337 | } | |
2338 | ||
877211f5 | 2339 | snd_pcm_sframes_t snd_pcm_lib_read(struct snd_pcm_substream *substream, void __user *buf, snd_pcm_uframes_t size) |
1da177e4 | 2340 | { |
877211f5 | 2341 | struct snd_pcm_runtime *runtime; |
1da177e4 | 2342 | int nonblock; |
7eaa943c | 2343 | int err; |
1da177e4 | 2344 | |
7eaa943c TI |
2345 | err = pcm_sanity_check(substream); |
2346 | if (err < 0) | |
2347 | return err; | |
1da177e4 | 2348 | runtime = substream->runtime; |
0df63e44 | 2349 | nonblock = !!(substream->f_flags & O_NONBLOCK); |
1da177e4 LT |
2350 | if (runtime->access != SNDRV_PCM_ACCESS_RW_INTERLEAVED) |
2351 | return -EINVAL; | |
2352 | return snd_pcm_lib_read1(substream, (unsigned long)buf, size, nonblock, snd_pcm_lib_read_transfer); | |
2353 | } | |
2354 | ||
e88e8ae6 TI |
2355 | EXPORT_SYMBOL(snd_pcm_lib_read); |
2356 | ||
877211f5 | 2357 | static int snd_pcm_lib_readv_transfer(struct snd_pcm_substream *substream, |
1da177e4 LT |
2358 | unsigned int hwoff, |
2359 | unsigned long data, unsigned int off, | |
2360 | snd_pcm_uframes_t frames) | |
2361 | { | |
877211f5 | 2362 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
2363 | int err; |
2364 | void __user **bufs = (void __user **)data; | |
2365 | int channels = runtime->channels; | |
2366 | int c; | |
2367 | if (substream->ops->copy) { | |
2368 | for (c = 0; c < channels; ++c, ++bufs) { | |
2369 | char __user *buf; | |
2370 | if (*bufs == NULL) | |
2371 | continue; | |
2372 | buf = *bufs + samples_to_bytes(runtime, off); | |
2373 | if ((err = substream->ops->copy(substream, c, hwoff, buf, frames)) < 0) | |
2374 | return err; | |
2375 | } | |
2376 | } else { | |
2377 | snd_pcm_uframes_t dma_csize = runtime->dma_bytes / channels; | |
1da177e4 LT |
2378 | for (c = 0; c < channels; ++c, ++bufs) { |
2379 | char *hwbuf; | |
2380 | char __user *buf; | |
2381 | if (*bufs == NULL) | |
2382 | continue; | |
2383 | ||
2384 | hwbuf = runtime->dma_area + (c * dma_csize) + samples_to_bytes(runtime, hwoff); | |
2385 | buf = *bufs + samples_to_bytes(runtime, off); | |
2386 | if (copy_to_user(buf, hwbuf, samples_to_bytes(runtime, frames))) | |
2387 | return -EFAULT; | |
2388 | } | |
2389 | } | |
2390 | return 0; | |
2391 | } | |
2392 | ||
877211f5 | 2393 | snd_pcm_sframes_t snd_pcm_lib_readv(struct snd_pcm_substream *substream, |
1da177e4 LT |
2394 | void __user **bufs, |
2395 | snd_pcm_uframes_t frames) | |
2396 | { | |
877211f5 | 2397 | struct snd_pcm_runtime *runtime; |
1da177e4 | 2398 | int nonblock; |
7eaa943c | 2399 | int err; |
1da177e4 | 2400 | |
7eaa943c TI |
2401 | err = pcm_sanity_check(substream); |
2402 | if (err < 0) | |
2403 | return err; | |
1da177e4 | 2404 | runtime = substream->runtime; |
1da177e4 LT |
2405 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) |
2406 | return -EBADFD; | |
2407 | ||
0df63e44 | 2408 | nonblock = !!(substream->f_flags & O_NONBLOCK); |
1da177e4 LT |
2409 | if (runtime->access != SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) |
2410 | return -EINVAL; | |
2411 | return snd_pcm_lib_read1(substream, (unsigned long)bufs, frames, nonblock, snd_pcm_lib_readv_transfer); | |
2412 | } | |
2413 | ||
1da177e4 | 2414 | EXPORT_SYMBOL(snd_pcm_lib_readv); |
2d3391ec TI |
2415 | |
2416 | /* | |
2417 | * standard channel mapping helpers | |
2418 | */ | |
2419 | ||
2420 | /* default channel maps for multi-channel playbacks, up to 8 channels */ | |
2421 | const struct snd_pcm_chmap_elem snd_pcm_std_chmaps[] = { | |
2422 | { .channels = 1, | |
5efbc261 | 2423 | .map = { SNDRV_CHMAP_MONO } }, |
2d3391ec TI |
2424 | { .channels = 2, |
2425 | .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR } }, | |
2426 | { .channels = 4, | |
2427 | .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, | |
2428 | SNDRV_CHMAP_RL, SNDRV_CHMAP_RR } }, | |
2429 | { .channels = 6, | |
2430 | .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, | |
2431 | SNDRV_CHMAP_RL, SNDRV_CHMAP_RR, | |
2432 | SNDRV_CHMAP_FC, SNDRV_CHMAP_LFE } }, | |
2433 | { .channels = 8, | |
2434 | .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, | |
2435 | SNDRV_CHMAP_RL, SNDRV_CHMAP_RR, | |
2436 | SNDRV_CHMAP_FC, SNDRV_CHMAP_LFE, | |
2437 | SNDRV_CHMAP_SL, SNDRV_CHMAP_SR } }, | |
2438 | { } | |
2439 | }; | |
2440 | EXPORT_SYMBOL_GPL(snd_pcm_std_chmaps); | |
2441 | ||
2442 | /* alternative channel maps with CLFE <-> surround swapped for 6/8 channels */ | |
2443 | const struct snd_pcm_chmap_elem snd_pcm_alt_chmaps[] = { | |
2444 | { .channels = 1, | |
5efbc261 | 2445 | .map = { SNDRV_CHMAP_MONO } }, |
2d3391ec TI |
2446 | { .channels = 2, |
2447 | .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR } }, | |
2448 | { .channels = 4, | |
2449 | .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, | |
2450 | SNDRV_CHMAP_RL, SNDRV_CHMAP_RR } }, | |
2451 | { .channels = 6, | |
2452 | .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, | |
2453 | SNDRV_CHMAP_FC, SNDRV_CHMAP_LFE, | |
2454 | SNDRV_CHMAP_RL, SNDRV_CHMAP_RR } }, | |
2455 | { .channels = 8, | |
2456 | .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, | |
2457 | SNDRV_CHMAP_FC, SNDRV_CHMAP_LFE, | |
2458 | SNDRV_CHMAP_RL, SNDRV_CHMAP_RR, | |
2459 | SNDRV_CHMAP_SL, SNDRV_CHMAP_SR } }, | |
2460 | { } | |
2461 | }; | |
2462 | EXPORT_SYMBOL_GPL(snd_pcm_alt_chmaps); | |
2463 | ||
2464 | static bool valid_chmap_channels(const struct snd_pcm_chmap *info, int ch) | |
2465 | { | |
2466 | if (ch > info->max_channels) | |
2467 | return false; | |
2468 | return !info->channel_mask || (info->channel_mask & (1U << ch)); | |
2469 | } | |
2470 | ||
2471 | static int pcm_chmap_ctl_info(struct snd_kcontrol *kcontrol, | |
2472 | struct snd_ctl_elem_info *uinfo) | |
2473 | { | |
2474 | struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol); | |
2475 | ||
2476 | uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; | |
2477 | uinfo->count = 0; | |
2478 | uinfo->count = info->max_channels; | |
2479 | uinfo->value.integer.min = 0; | |
2480 | uinfo->value.integer.max = SNDRV_CHMAP_LAST; | |
2481 | return 0; | |
2482 | } | |
2483 | ||
2484 | /* get callback for channel map ctl element | |
2485 | * stores the channel position firstly matching with the current channels | |
2486 | */ | |
2487 | static int pcm_chmap_ctl_get(struct snd_kcontrol *kcontrol, | |
2488 | struct snd_ctl_elem_value *ucontrol) | |
2489 | { | |
2490 | struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol); | |
2491 | unsigned int idx = snd_ctl_get_ioffidx(kcontrol, &ucontrol->id); | |
2492 | struct snd_pcm_substream *substream; | |
2493 | const struct snd_pcm_chmap_elem *map; | |
2494 | ||
2495 | if (snd_BUG_ON(!info->chmap)) | |
2496 | return -EINVAL; | |
2497 | substream = snd_pcm_chmap_substream(info, idx); | |
2498 | if (!substream) | |
2499 | return -ENODEV; | |
2500 | memset(ucontrol->value.integer.value, 0, | |
2501 | sizeof(ucontrol->value.integer.value)); | |
2502 | if (!substream->runtime) | |
2503 | return 0; /* no channels set */ | |
2504 | for (map = info->chmap; map->channels; map++) { | |
2505 | int i; | |
2506 | if (map->channels == substream->runtime->channels && | |
2507 | valid_chmap_channels(info, map->channels)) { | |
2508 | for (i = 0; i < map->channels; i++) | |
2509 | ucontrol->value.integer.value[i] = map->map[i]; | |
2510 | return 0; | |
2511 | } | |
2512 | } | |
2513 | return -EINVAL; | |
2514 | } | |
2515 | ||
2516 | /* tlv callback for channel map ctl element | |
2517 | * expands the pre-defined channel maps in a form of TLV | |
2518 | */ | |
2519 | static int pcm_chmap_ctl_tlv(struct snd_kcontrol *kcontrol, int op_flag, | |
2520 | unsigned int size, unsigned int __user *tlv) | |
2521 | { | |
2522 | struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol); | |
2523 | const struct snd_pcm_chmap_elem *map; | |
2524 | unsigned int __user *dst; | |
2525 | int c, count = 0; | |
2526 | ||
2527 | if (snd_BUG_ON(!info->chmap)) | |
2528 | return -EINVAL; | |
2529 | if (size < 8) | |
2530 | return -ENOMEM; | |
2531 | if (put_user(SNDRV_CTL_TLVT_CONTAINER, tlv)) | |
2532 | return -EFAULT; | |
2533 | size -= 8; | |
2534 | dst = tlv + 2; | |
2535 | for (map = info->chmap; map->channels; map++) { | |
2536 | int chs_bytes = map->channels * 4; | |
2537 | if (!valid_chmap_channels(info, map->channels)) | |
2538 | continue; | |
2539 | if (size < 8) | |
2540 | return -ENOMEM; | |
2541 | if (put_user(SNDRV_CTL_TLVT_CHMAP_FIXED, dst) || | |
2542 | put_user(chs_bytes, dst + 1)) | |
2543 | return -EFAULT; | |
2544 | dst += 2; | |
2545 | size -= 8; | |
2546 | count += 8; | |
2547 | if (size < chs_bytes) | |
2548 | return -ENOMEM; | |
2549 | size -= chs_bytes; | |
2550 | count += chs_bytes; | |
2551 | for (c = 0; c < map->channels; c++) { | |
2552 | if (put_user(map->map[c], dst)) | |
2553 | return -EFAULT; | |
2554 | dst++; | |
2555 | } | |
2556 | } | |
2557 | if (put_user(count, tlv + 1)) | |
2558 | return -EFAULT; | |
2559 | return 0; | |
2560 | } | |
2561 | ||
2562 | static void pcm_chmap_ctl_private_free(struct snd_kcontrol *kcontrol) | |
2563 | { | |
2564 | struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol); | |
2565 | info->pcm->streams[info->stream].chmap_kctl = NULL; | |
2566 | kfree(info); | |
2567 | } | |
2568 | ||
2569 | /** | |
2570 | * snd_pcm_add_chmap_ctls - create channel-mapping control elements | |
2571 | * @pcm: the assigned PCM instance | |
2572 | * @stream: stream direction | |
2573 | * @chmap: channel map elements (for query) | |
2574 | * @max_channels: the max number of channels for the stream | |
2575 | * @private_value: the value passed to each kcontrol's private_value field | |
2576 | * @info_ret: store struct snd_pcm_chmap instance if non-NULL | |
2577 | * | |
2578 | * Create channel-mapping control elements assigned to the given PCM stream(s). | |
eb7c06e8 | 2579 | * Return: Zero if successful, or a negative error value. |
2d3391ec TI |
2580 | */ |
2581 | int snd_pcm_add_chmap_ctls(struct snd_pcm *pcm, int stream, | |
2582 | const struct snd_pcm_chmap_elem *chmap, | |
2583 | int max_channels, | |
2584 | unsigned long private_value, | |
2585 | struct snd_pcm_chmap **info_ret) | |
2586 | { | |
2587 | struct snd_pcm_chmap *info; | |
2588 | struct snd_kcontrol_new knew = { | |
2589 | .iface = SNDRV_CTL_ELEM_IFACE_PCM, | |
2590 | .access = SNDRV_CTL_ELEM_ACCESS_READ | | |
2d3391ec TI |
2591 | SNDRV_CTL_ELEM_ACCESS_TLV_READ | |
2592 | SNDRV_CTL_ELEM_ACCESS_TLV_CALLBACK, | |
2593 | .info = pcm_chmap_ctl_info, | |
2594 | .get = pcm_chmap_ctl_get, | |
2595 | .tlv.c = pcm_chmap_ctl_tlv, | |
2596 | }; | |
2597 | int err; | |
2598 | ||
8d879be8 TI |
2599 | if (WARN_ON(pcm->streams[stream].chmap_kctl)) |
2600 | return -EBUSY; | |
2d3391ec TI |
2601 | info = kzalloc(sizeof(*info), GFP_KERNEL); |
2602 | if (!info) | |
2603 | return -ENOMEM; | |
2604 | info->pcm = pcm; | |
2605 | info->stream = stream; | |
2606 | info->chmap = chmap; | |
2607 | info->max_channels = max_channels; | |
2608 | if (stream == SNDRV_PCM_STREAM_PLAYBACK) | |
2609 | knew.name = "Playback Channel Map"; | |
2610 | else | |
2611 | knew.name = "Capture Channel Map"; | |
2612 | knew.device = pcm->device; | |
2613 | knew.count = pcm->streams[stream].substream_count; | |
2614 | knew.private_value = private_value; | |
2615 | info->kctl = snd_ctl_new1(&knew, info); | |
2616 | if (!info->kctl) { | |
2617 | kfree(info); | |
2618 | return -ENOMEM; | |
2619 | } | |
2620 | info->kctl->private_free = pcm_chmap_ctl_private_free; | |
2621 | err = snd_ctl_add(pcm->card, info->kctl); | |
2622 | if (err < 0) | |
2623 | return err; | |
2624 | pcm->streams[stream].chmap_kctl = info->kctl; | |
2625 | if (info_ret) | |
2626 | *info_ret = info; | |
2627 | return 0; | |
2628 | } | |
2629 | EXPORT_SYMBOL_GPL(snd_pcm_add_chmap_ctls); |