Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * Digital Audio (PCM) abstract layer | |
c1017a4c | 3 | * Copyright (c) by Jaroslav Kysela <perex@perex.cz> |
1da177e4 LT |
4 | * Abramo Bagnara <abramo@alsa-project.org> |
5 | * | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program; if not, write to the Free Software | |
19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
20 | * | |
21 | */ | |
22 | ||
1da177e4 LT |
23 | #include <linux/slab.h> |
24 | #include <linux/time.h> | |
3f7440a6 | 25 | #include <linux/math64.h> |
d81a6d71 | 26 | #include <linux/export.h> |
1da177e4 LT |
27 | #include <sound/core.h> |
28 | #include <sound/control.h> | |
2d3391ec | 29 | #include <sound/tlv.h> |
1da177e4 LT |
30 | #include <sound/info.h> |
31 | #include <sound/pcm.h> | |
32 | #include <sound/pcm_params.h> | |
33 | #include <sound/timer.h> | |
34 | ||
f5914908 TI |
35 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
36 | #define CREATE_TRACE_POINTS | |
37 | #include "pcm_trace.h" | |
38 | #else | |
39 | #define trace_hwptr(substream, pos, in_interrupt) | |
40 | #define trace_xrun(substream) | |
41 | #define trace_hw_ptr_error(substream, reason) | |
42 | #endif | |
43 | ||
1da177e4 LT |
44 | /* |
45 | * fill ring buffer with silence | |
46 | * runtime->silence_start: starting pointer to silence area | |
47 | * runtime->silence_filled: size filled with silence | |
48 | * runtime->silence_threshold: threshold from application | |
49 | * runtime->silence_size: maximal size from application | |
50 | * | |
51 | * when runtime->silence_size >= runtime->boundary - fill processed area with silence immediately | |
52 | */ | |
877211f5 | 53 | void snd_pcm_playback_silence(struct snd_pcm_substream *substream, snd_pcm_uframes_t new_hw_ptr) |
1da177e4 | 54 | { |
877211f5 | 55 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
56 | snd_pcm_uframes_t frames, ofs, transfer; |
57 | ||
58 | if (runtime->silence_size < runtime->boundary) { | |
59 | snd_pcm_sframes_t noise_dist, n; | |
60 | if (runtime->silence_start != runtime->control->appl_ptr) { | |
61 | n = runtime->control->appl_ptr - runtime->silence_start; | |
62 | if (n < 0) | |
63 | n += runtime->boundary; | |
64 | if ((snd_pcm_uframes_t)n < runtime->silence_filled) | |
65 | runtime->silence_filled -= n; | |
66 | else | |
67 | runtime->silence_filled = 0; | |
68 | runtime->silence_start = runtime->control->appl_ptr; | |
69 | } | |
235475cb | 70 | if (runtime->silence_filled >= runtime->buffer_size) |
1da177e4 | 71 | return; |
1da177e4 LT |
72 | noise_dist = snd_pcm_playback_hw_avail(runtime) + runtime->silence_filled; |
73 | if (noise_dist >= (snd_pcm_sframes_t) runtime->silence_threshold) | |
74 | return; | |
75 | frames = runtime->silence_threshold - noise_dist; | |
76 | if (frames > runtime->silence_size) | |
77 | frames = runtime->silence_size; | |
78 | } else { | |
79 | if (new_hw_ptr == ULONG_MAX) { /* initialization */ | |
80 | snd_pcm_sframes_t avail = snd_pcm_playback_hw_avail(runtime); | |
9e216e8a JK |
81 | if (avail > runtime->buffer_size) |
82 | avail = runtime->buffer_size; | |
1da177e4 LT |
83 | runtime->silence_filled = avail > 0 ? avail : 0; |
84 | runtime->silence_start = (runtime->status->hw_ptr + | |
85 | runtime->silence_filled) % | |
86 | runtime->boundary; | |
87 | } else { | |
88 | ofs = runtime->status->hw_ptr; | |
89 | frames = new_hw_ptr - ofs; | |
90 | if ((snd_pcm_sframes_t)frames < 0) | |
91 | frames += runtime->boundary; | |
92 | runtime->silence_filled -= frames; | |
93 | if ((snd_pcm_sframes_t)runtime->silence_filled < 0) { | |
94 | runtime->silence_filled = 0; | |
9a826ddb | 95 | runtime->silence_start = new_hw_ptr; |
1da177e4 | 96 | } else { |
9a826ddb | 97 | runtime->silence_start = ofs; |
1da177e4 | 98 | } |
1da177e4 LT |
99 | } |
100 | frames = runtime->buffer_size - runtime->silence_filled; | |
101 | } | |
7eaa943c TI |
102 | if (snd_BUG_ON(frames > runtime->buffer_size)) |
103 | return; | |
1da177e4 LT |
104 | if (frames == 0) |
105 | return; | |
9a826ddb | 106 | ofs = runtime->silence_start % runtime->buffer_size; |
1da177e4 LT |
107 | while (frames > 0) { |
108 | transfer = ofs + frames > runtime->buffer_size ? runtime->buffer_size - ofs : frames; | |
109 | if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED || | |
110 | runtime->access == SNDRV_PCM_ACCESS_MMAP_INTERLEAVED) { | |
111 | if (substream->ops->silence) { | |
112 | int err; | |
113 | err = substream->ops->silence(substream, -1, ofs, transfer); | |
7eaa943c | 114 | snd_BUG_ON(err < 0); |
1da177e4 LT |
115 | } else { |
116 | char *hwbuf = runtime->dma_area + frames_to_bytes(runtime, ofs); | |
117 | snd_pcm_format_set_silence(runtime->format, hwbuf, transfer * runtime->channels); | |
118 | } | |
119 | } else { | |
120 | unsigned int c; | |
121 | unsigned int channels = runtime->channels; | |
122 | if (substream->ops->silence) { | |
123 | for (c = 0; c < channels; ++c) { | |
124 | int err; | |
125 | err = substream->ops->silence(substream, c, ofs, transfer); | |
7eaa943c | 126 | snd_BUG_ON(err < 0); |
1da177e4 LT |
127 | } |
128 | } else { | |
129 | size_t dma_csize = runtime->dma_bytes / channels; | |
130 | for (c = 0; c < channels; ++c) { | |
131 | char *hwbuf = runtime->dma_area + (c * dma_csize) + samples_to_bytes(runtime, ofs); | |
132 | snd_pcm_format_set_silence(runtime->format, hwbuf, transfer); | |
133 | } | |
134 | } | |
135 | } | |
136 | runtime->silence_filled += transfer; | |
137 | frames -= transfer; | |
138 | ofs = 0; | |
139 | } | |
140 | } | |
141 | ||
acb03d44 EB |
142 | #ifdef CONFIG_SND_DEBUG |
143 | void snd_pcm_debug_name(struct snd_pcm_substream *substream, | |
c0070110 TI |
144 | char *name, size_t len) |
145 | { | |
146 | snprintf(name, len, "pcmC%dD%d%c:%d", | |
147 | substream->pcm->card->number, | |
148 | substream->pcm->device, | |
149 | substream->stream ? 'c' : 'p', | |
150 | substream->number); | |
151 | } | |
acb03d44 EB |
152 | EXPORT_SYMBOL(snd_pcm_debug_name); |
153 | #endif | |
c0070110 | 154 | |
741b20cf JK |
155 | #define XRUN_DEBUG_BASIC (1<<0) |
156 | #define XRUN_DEBUG_STACK (1<<1) /* dump also stack */ | |
157 | #define XRUN_DEBUG_JIFFIESCHECK (1<<2) /* do jiffies check */ | |
741b20cf | 158 | |
ed3da3d9 | 159 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
4d96eb25 | 160 | |
741b20cf JK |
161 | #define xrun_debug(substream, mask) \ |
162 | ((substream)->pstr->xrun_debug & (mask)) | |
0f17014b JN |
163 | #else |
164 | #define xrun_debug(substream, mask) 0 | |
165 | #endif | |
ed3da3d9 | 166 | |
741b20cf JK |
167 | #define dump_stack_on_xrun(substream) do { \ |
168 | if (xrun_debug(substream, XRUN_DEBUG_STACK)) \ | |
169 | dump_stack(); \ | |
ed3da3d9 TI |
170 | } while (0) |
171 | ||
877211f5 | 172 | static void xrun(struct snd_pcm_substream *substream) |
1da177e4 | 173 | { |
13f040f9 JK |
174 | struct snd_pcm_runtime *runtime = substream->runtime; |
175 | ||
f5914908 | 176 | trace_xrun(substream); |
13f040f9 JK |
177 | if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) |
178 | snd_pcm_gettime(runtime, (struct timespec *)&runtime->status->tstamp); | |
1da177e4 | 179 | snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN); |
741b20cf | 180 | if (xrun_debug(substream, XRUN_DEBUG_BASIC)) { |
c0070110 | 181 | char name[16]; |
acb03d44 | 182 | snd_pcm_debug_name(substream, name, sizeof(name)); |
09e56df8 | 183 | pcm_warn(substream->pcm, "XRUN: %s\n", name); |
ed3da3d9 | 184 | dump_stack_on_xrun(substream); |
1da177e4 | 185 | } |
1da177e4 LT |
186 | } |
187 | ||
0f17014b | 188 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
f5914908 | 189 | #define hw_ptr_error(substream, in_interrupt, reason, fmt, args...) \ |
4d96eb25 | 190 | do { \ |
f5914908 | 191 | trace_hw_ptr_error(substream, reason); \ |
4d96eb25 | 192 | if (xrun_debug(substream, XRUN_DEBUG_BASIC)) { \ |
f5914908 TI |
193 | pr_err_ratelimited("ALSA: PCM: [%c] " reason ": " fmt, \ |
194 | (in_interrupt) ? 'Q' : 'P', ##args); \ | |
4d96eb25 JK |
195 | dump_stack_on_xrun(substream); \ |
196 | } \ | |
197 | } while (0) | |
198 | ||
4d96eb25 JK |
199 | #else /* ! CONFIG_SND_PCM_XRUN_DEBUG */ |
200 | ||
4d96eb25 | 201 | #define hw_ptr_error(substream, fmt, args...) do { } while (0) |
4d96eb25 JK |
202 | |
203 | #endif | |
204 | ||
1250932e JK |
205 | int snd_pcm_update_state(struct snd_pcm_substream *substream, |
206 | struct snd_pcm_runtime *runtime) | |
1da177e4 LT |
207 | { |
208 | snd_pcm_uframes_t avail; | |
209 | ||
210 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) | |
211 | avail = snd_pcm_playback_avail(runtime); | |
212 | else | |
213 | avail = snd_pcm_capture_avail(runtime); | |
214 | if (avail > runtime->avail_max) | |
215 | runtime->avail_max = avail; | |
4cdc115f TI |
216 | if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) { |
217 | if (avail >= runtime->buffer_size) { | |
1da177e4 | 218 | snd_pcm_drain_done(substream); |
4cdc115f TI |
219 | return -EPIPE; |
220 | } | |
221 | } else { | |
222 | if (avail >= runtime->stop_threshold) { | |
1da177e4 | 223 | xrun(substream); |
4cdc115f TI |
224 | return -EPIPE; |
225 | } | |
1da177e4 | 226 | } |
5daeba34 DD |
227 | if (runtime->twake) { |
228 | if (avail >= runtime->twake) | |
229 | wake_up(&runtime->tsleep); | |
230 | } else if (avail >= runtime->control->avail_min) | |
231 | wake_up(&runtime->sleep); | |
1da177e4 LT |
232 | return 0; |
233 | } | |
234 | ||
3179f620 PLB |
235 | static void update_audio_tstamp(struct snd_pcm_substream *substream, |
236 | struct timespec *curr_tstamp, | |
237 | struct timespec *audio_tstamp) | |
238 | { | |
239 | struct snd_pcm_runtime *runtime = substream->runtime; | |
240 | u64 audio_frames, audio_nsecs; | |
241 | struct timespec driver_tstamp; | |
242 | ||
243 | if (runtime->tstamp_mode != SNDRV_PCM_TSTAMP_ENABLE) | |
244 | return; | |
245 | ||
246 | if (!(substream->ops->get_time_info) || | |
247 | (runtime->audio_tstamp_report.actual_type == | |
248 | SNDRV_PCM_AUDIO_TSTAMP_TYPE_DEFAULT)) { | |
249 | ||
250 | /* | |
251 | * provide audio timestamp derived from pointer position | |
252 | * add delay only if requested | |
253 | */ | |
254 | ||
255 | audio_frames = runtime->hw_ptr_wrap + runtime->status->hw_ptr; | |
256 | ||
257 | if (runtime->audio_tstamp_config.report_delay) { | |
258 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) | |
259 | audio_frames -= runtime->delay; | |
260 | else | |
261 | audio_frames += runtime->delay; | |
262 | } | |
263 | audio_nsecs = div_u64(audio_frames * 1000000000LL, | |
264 | runtime->rate); | |
265 | *audio_tstamp = ns_to_timespec(audio_nsecs); | |
266 | } | |
267 | runtime->status->audio_tstamp = *audio_tstamp; | |
268 | runtime->status->tstamp = *curr_tstamp; | |
269 | ||
270 | /* | |
271 | * re-take a driver timestamp to let apps detect if the reference tstamp | |
272 | * read by low-level hardware was provided with a delay | |
273 | */ | |
274 | snd_pcm_gettime(substream->runtime, (struct timespec *)&driver_tstamp); | |
275 | runtime->driver_tstamp = driver_tstamp; | |
276 | } | |
277 | ||
f240406b JK |
278 | static int snd_pcm_update_hw_ptr0(struct snd_pcm_substream *substream, |
279 | unsigned int in_interrupt) | |
1da177e4 | 280 | { |
877211f5 | 281 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 | 282 | snd_pcm_uframes_t pos; |
f240406b | 283 | snd_pcm_uframes_t old_hw_ptr, new_hw_ptr, hw_base; |
bbf6ad13 JK |
284 | snd_pcm_sframes_t hdelta, delta; |
285 | unsigned long jdelta; | |
3509a03f PLB |
286 | unsigned long curr_jiffies; |
287 | struct timespec curr_tstamp; | |
4eeaaeae | 288 | struct timespec audio_tstamp; |
0e8014d7 | 289 | int crossed_boundary = 0; |
1da177e4 | 290 | |
bbf6ad13 | 291 | old_hw_ptr = runtime->status->hw_ptr; |
3509a03f PLB |
292 | |
293 | /* | |
294 | * group pointer, time and jiffies reads to allow for more | |
295 | * accurate correlations/corrections. | |
296 | * The values are stored at the end of this routine after | |
297 | * corrections for hw_ptr position | |
298 | */ | |
f240406b | 299 | pos = substream->ops->pointer(substream); |
3509a03f | 300 | curr_jiffies = jiffies; |
4eeaaeae | 301 | if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) { |
3179f620 PLB |
302 | if ((substream->ops->get_time_info) && |
303 | (runtime->audio_tstamp_config.type_requested != SNDRV_PCM_AUDIO_TSTAMP_TYPE_DEFAULT)) { | |
304 | substream->ops->get_time_info(substream, &curr_tstamp, | |
305 | &audio_tstamp, | |
306 | &runtime->audio_tstamp_config, | |
307 | &runtime->audio_tstamp_report); | |
308 | ||
309 | /* re-test in case tstamp type is not supported in hardware and was demoted to DEFAULT */ | |
310 | if (runtime->audio_tstamp_report.actual_type == SNDRV_PCM_AUDIO_TSTAMP_TYPE_DEFAULT) | |
311 | snd_pcm_gettime(runtime, (struct timespec *)&curr_tstamp); | |
312 | } else | |
313 | snd_pcm_gettime(runtime, (struct timespec *)&curr_tstamp); | |
4eeaaeae PLB |
314 | } |
315 | ||
1da177e4 LT |
316 | if (pos == SNDRV_PCM_POS_XRUN) { |
317 | xrun(substream); | |
318 | return -EPIPE; | |
319 | } | |
f240406b | 320 | if (pos >= runtime->buffer_size) { |
09e56df8 | 321 | if (printk_ratelimit()) { |
f240406b | 322 | char name[16]; |
acb03d44 | 323 | snd_pcm_debug_name(substream, name, sizeof(name)); |
09e56df8 | 324 | pcm_err(substream->pcm, |
0ab1ace8 | 325 | "invalid position: %s, pos = %ld, buffer size = %ld, period size = %ld\n", |
09e56df8 TI |
326 | name, pos, runtime->buffer_size, |
327 | runtime->period_size); | |
f240406b JK |
328 | } |
329 | pos = 0; | |
cedb8118 | 330 | } |
f240406b | 331 | pos -= pos % runtime->min_align; |
f5914908 | 332 | trace_hwptr(substream, pos, in_interrupt); |
ed3da3d9 TI |
333 | hw_base = runtime->hw_ptr_base; |
334 | new_hw_ptr = hw_base + pos; | |
f240406b JK |
335 | if (in_interrupt) { |
336 | /* we know that one period was processed */ | |
337 | /* delta = "expected next hw_ptr" for in_interrupt != 0 */ | |
e7636925 | 338 | delta = runtime->hw_ptr_interrupt + runtime->period_size; |
f240406b | 339 | if (delta > new_hw_ptr) { |
bd76af0f | 340 | /* check for double acknowledged interrupts */ |
3509a03f | 341 | hdelta = curr_jiffies - runtime->hw_ptr_jiffies; |
13a98839 | 342 | if (hdelta > runtime->hw_ptr_buffer_jiffies/2 + 1) { |
bd76af0f | 343 | hw_base += runtime->buffer_size; |
0e8014d7 | 344 | if (hw_base >= runtime->boundary) { |
bd76af0f | 345 | hw_base = 0; |
0e8014d7 PLB |
346 | crossed_boundary++; |
347 | } | |
bd76af0f JK |
348 | new_hw_ptr = hw_base + pos; |
349 | goto __delta; | |
350 | } | |
1da177e4 | 351 | } |
1da177e4 | 352 | } |
f240406b JK |
353 | /* new_hw_ptr might be lower than old_hw_ptr in case when */ |
354 | /* pointer crosses the end of the ring buffer */ | |
355 | if (new_hw_ptr < old_hw_ptr) { | |
356 | hw_base += runtime->buffer_size; | |
0e8014d7 | 357 | if (hw_base >= runtime->boundary) { |
f240406b | 358 | hw_base = 0; |
0e8014d7 PLB |
359 | crossed_boundary++; |
360 | } | |
f240406b JK |
361 | new_hw_ptr = hw_base + pos; |
362 | } | |
363 | __delta: | |
b406e610 CL |
364 | delta = new_hw_ptr - old_hw_ptr; |
365 | if (delta < 0) | |
366 | delta += runtime->boundary; | |
ab69a490 | 367 | |
59ff878f | 368 | if (runtime->no_period_wakeup) { |
12ff414e | 369 | snd_pcm_sframes_t xrun_threshold; |
59ff878f CL |
370 | /* |
371 | * Without regular period interrupts, we have to check | |
372 | * the elapsed time to detect xruns. | |
373 | */ | |
3509a03f | 374 | jdelta = curr_jiffies - runtime->hw_ptr_jiffies; |
47228e48 CL |
375 | if (jdelta < runtime->hw_ptr_buffer_jiffies / 2) |
376 | goto no_delta_check; | |
59ff878f | 377 | hdelta = jdelta - delta * HZ / runtime->rate; |
12ff414e KA |
378 | xrun_threshold = runtime->hw_ptr_buffer_jiffies / 2 + 1; |
379 | while (hdelta > xrun_threshold) { | |
59ff878f CL |
380 | delta += runtime->buffer_size; |
381 | hw_base += runtime->buffer_size; | |
0e8014d7 | 382 | if (hw_base >= runtime->boundary) { |
59ff878f | 383 | hw_base = 0; |
0e8014d7 PLB |
384 | crossed_boundary++; |
385 | } | |
59ff878f CL |
386 | new_hw_ptr = hw_base + pos; |
387 | hdelta -= runtime->hw_ptr_buffer_jiffies; | |
388 | } | |
ab69a490 | 389 | goto no_delta_check; |
59ff878f | 390 | } |
ab69a490 | 391 | |
f240406b | 392 | /* something must be really wrong */ |
7b3a177b | 393 | if (delta >= runtime->buffer_size + runtime->period_size) { |
f5914908 TI |
394 | hw_ptr_error(substream, in_interrupt, "Unexpected hw_ptr", |
395 | "(stream=%i, pos=%ld, new_hw_ptr=%ld, old_hw_ptr=%ld)\n", | |
396 | substream->stream, (long)pos, | |
397 | (long)new_hw_ptr, (long)old_hw_ptr); | |
f240406b JK |
398 | return 0; |
399 | } | |
c87d9732 TI |
400 | |
401 | /* Do jiffies check only in xrun_debug mode */ | |
741b20cf | 402 | if (!xrun_debug(substream, XRUN_DEBUG_JIFFIESCHECK)) |
c87d9732 TI |
403 | goto no_jiffies_check; |
404 | ||
3e5b5016 TI |
405 | /* Skip the jiffies check for hardwares with BATCH flag. |
406 | * Such hardware usually just increases the position at each IRQ, | |
407 | * thus it can't give any strange position. | |
408 | */ | |
409 | if (runtime->hw.info & SNDRV_PCM_INFO_BATCH) | |
410 | goto no_jiffies_check; | |
f240406b | 411 | hdelta = delta; |
a4444da3 JK |
412 | if (hdelta < runtime->delay) |
413 | goto no_jiffies_check; | |
414 | hdelta -= runtime->delay; | |
3509a03f | 415 | jdelta = curr_jiffies - runtime->hw_ptr_jiffies; |
bbf6ad13 JK |
416 | if (((hdelta * HZ) / runtime->rate) > jdelta + HZ/100) { |
417 | delta = jdelta / | |
418 | (((runtime->period_size * HZ) / runtime->rate) | |
419 | + HZ/100); | |
f240406b JK |
420 | /* move new_hw_ptr according jiffies not pos variable */ |
421 | new_hw_ptr = old_hw_ptr; | |
ed69c6a8 | 422 | hw_base = delta; |
f240406b JK |
423 | /* use loop to avoid checks for delta overflows */ |
424 | /* the delta value is small or zero in most cases */ | |
425 | while (delta > 0) { | |
426 | new_hw_ptr += runtime->period_size; | |
0e8014d7 | 427 | if (new_hw_ptr >= runtime->boundary) { |
f240406b | 428 | new_hw_ptr -= runtime->boundary; |
0e8014d7 PLB |
429 | crossed_boundary--; |
430 | } | |
f240406b JK |
431 | delta--; |
432 | } | |
433 | /* align hw_base to buffer_size */ | |
f5914908 TI |
434 | hw_ptr_error(substream, in_interrupt, "hw_ptr skipping", |
435 | "(pos=%ld, delta=%ld, period=%ld, jdelta=%lu/%lu/%lu, hw_ptr=%ld/%ld)\n", | |
bbf6ad13 JK |
436 | (long)pos, (long)hdelta, |
437 | (long)runtime->period_size, jdelta, | |
ed69c6a8 | 438 | ((hdelta * HZ) / runtime->rate), hw_base, |
f240406b JK |
439 | (unsigned long)old_hw_ptr, |
440 | (unsigned long)new_hw_ptr); | |
ed69c6a8 JK |
441 | /* reset values to proper state */ |
442 | delta = 0; | |
443 | hw_base = new_hw_ptr - (new_hw_ptr % runtime->buffer_size); | |
bbf6ad13 | 444 | } |
3e5b5016 | 445 | no_jiffies_check: |
bbf6ad13 | 446 | if (delta > runtime->period_size + runtime->period_size / 2) { |
f5914908 TI |
447 | hw_ptr_error(substream, in_interrupt, |
448 | "Lost interrupts?", | |
449 | "(stream=%i, delta=%ld, new_hw_ptr=%ld, old_hw_ptr=%ld)\n", | |
ed3da3d9 | 450 | substream->stream, (long)delta, |
f240406b JK |
451 | (long)new_hw_ptr, |
452 | (long)old_hw_ptr); | |
ed3da3d9 | 453 | } |
f240406b | 454 | |
ab69a490 | 455 | no_delta_check: |
3179f620 PLB |
456 | if (runtime->status->hw_ptr == new_hw_ptr) { |
457 | update_audio_tstamp(substream, &curr_tstamp, &audio_tstamp); | |
f240406b | 458 | return 0; |
3179f620 | 459 | } |
ab1863fc | 460 | |
1da177e4 LT |
461 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && |
462 | runtime->silence_size > 0) | |
463 | snd_pcm_playback_silence(substream, new_hw_ptr); | |
464 | ||
e7636925 | 465 | if (in_interrupt) { |
ead4046b CL |
466 | delta = new_hw_ptr - runtime->hw_ptr_interrupt; |
467 | if (delta < 0) | |
468 | delta += runtime->boundary; | |
469 | delta -= (snd_pcm_uframes_t)delta % runtime->period_size; | |
470 | runtime->hw_ptr_interrupt += delta; | |
471 | if (runtime->hw_ptr_interrupt >= runtime->boundary) | |
472 | runtime->hw_ptr_interrupt -= runtime->boundary; | |
e7636925 | 473 | } |
ed3da3d9 | 474 | runtime->hw_ptr_base = hw_base; |
1da177e4 | 475 | runtime->status->hw_ptr = new_hw_ptr; |
3509a03f | 476 | runtime->hw_ptr_jiffies = curr_jiffies; |
0e8014d7 PLB |
477 | if (crossed_boundary) { |
478 | snd_BUG_ON(crossed_boundary != 1); | |
479 | runtime->hw_ptr_wrap += runtime->boundary; | |
480 | } | |
4eeaaeae | 481 | |
3179f620 | 482 | update_audio_tstamp(substream, &curr_tstamp, &audio_tstamp); |
4eeaaeae | 483 | |
1250932e | 484 | return snd_pcm_update_state(substream, runtime); |
1da177e4 LT |
485 | } |
486 | ||
487 | /* CAUTION: call it with irq disabled */ | |
877211f5 | 488 | int snd_pcm_update_hw_ptr(struct snd_pcm_substream *substream) |
1da177e4 | 489 | { |
f240406b | 490 | return snd_pcm_update_hw_ptr0(substream, 0); |
1da177e4 LT |
491 | } |
492 | ||
493 | /** | |
494 | * snd_pcm_set_ops - set the PCM operators | |
495 | * @pcm: the pcm instance | |
496 | * @direction: stream direction, SNDRV_PCM_STREAM_XXX | |
497 | * @ops: the operator table | |
498 | * | |
499 | * Sets the given PCM operators to the pcm instance. | |
500 | */ | |
e6c2e7eb LPC |
501 | void snd_pcm_set_ops(struct snd_pcm *pcm, int direction, |
502 | const struct snd_pcm_ops *ops) | |
1da177e4 | 503 | { |
877211f5 TI |
504 | struct snd_pcm_str *stream = &pcm->streams[direction]; |
505 | struct snd_pcm_substream *substream; | |
1da177e4 LT |
506 | |
507 | for (substream = stream->substream; substream != NULL; substream = substream->next) | |
508 | substream->ops = ops; | |
509 | } | |
510 | ||
e88e8ae6 | 511 | EXPORT_SYMBOL(snd_pcm_set_ops); |
1da177e4 LT |
512 | |
513 | /** | |
514 | * snd_pcm_sync - set the PCM sync id | |
515 | * @substream: the pcm substream | |
516 | * | |
517 | * Sets the PCM sync identifier for the card. | |
518 | */ | |
877211f5 | 519 | void snd_pcm_set_sync(struct snd_pcm_substream *substream) |
1da177e4 | 520 | { |
877211f5 | 521 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
522 | |
523 | runtime->sync.id32[0] = substream->pcm->card->number; | |
524 | runtime->sync.id32[1] = -1; | |
525 | runtime->sync.id32[2] = -1; | |
526 | runtime->sync.id32[3] = -1; | |
527 | } | |
528 | ||
e88e8ae6 TI |
529 | EXPORT_SYMBOL(snd_pcm_set_sync); |
530 | ||
1da177e4 LT |
531 | /* |
532 | * Standard ioctl routine | |
533 | */ | |
534 | ||
1da177e4 LT |
535 | static inline unsigned int div32(unsigned int a, unsigned int b, |
536 | unsigned int *r) | |
537 | { | |
538 | if (b == 0) { | |
539 | *r = 0; | |
540 | return UINT_MAX; | |
541 | } | |
542 | *r = a % b; | |
543 | return a / b; | |
544 | } | |
545 | ||
546 | static inline unsigned int div_down(unsigned int a, unsigned int b) | |
547 | { | |
548 | if (b == 0) | |
549 | return UINT_MAX; | |
550 | return a / b; | |
551 | } | |
552 | ||
553 | static inline unsigned int div_up(unsigned int a, unsigned int b) | |
554 | { | |
555 | unsigned int r; | |
556 | unsigned int q; | |
557 | if (b == 0) | |
558 | return UINT_MAX; | |
559 | q = div32(a, b, &r); | |
560 | if (r) | |
561 | ++q; | |
562 | return q; | |
563 | } | |
564 | ||
565 | static inline unsigned int mul(unsigned int a, unsigned int b) | |
566 | { | |
567 | if (a == 0) | |
568 | return 0; | |
569 | if (div_down(UINT_MAX, a) < b) | |
570 | return UINT_MAX; | |
571 | return a * b; | |
572 | } | |
573 | ||
574 | static inline unsigned int muldiv32(unsigned int a, unsigned int b, | |
575 | unsigned int c, unsigned int *r) | |
576 | { | |
577 | u_int64_t n = (u_int64_t) a * b; | |
578 | if (c == 0) { | |
7eaa943c | 579 | snd_BUG_ON(!n); |
1da177e4 LT |
580 | *r = 0; |
581 | return UINT_MAX; | |
582 | } | |
3f7440a6 | 583 | n = div_u64_rem(n, c, r); |
1da177e4 LT |
584 | if (n >= UINT_MAX) { |
585 | *r = 0; | |
586 | return UINT_MAX; | |
587 | } | |
588 | return n; | |
589 | } | |
590 | ||
1da177e4 LT |
591 | /** |
592 | * snd_interval_refine - refine the interval value of configurator | |
593 | * @i: the interval value to refine | |
594 | * @v: the interval value to refer to | |
595 | * | |
596 | * Refines the interval value with the reference value. | |
597 | * The interval is changed to the range satisfying both intervals. | |
598 | * The interval status (min, max, integer, etc.) are evaluated. | |
599 | * | |
eb7c06e8 YB |
600 | * Return: Positive if the value is changed, zero if it's not changed, or a |
601 | * negative error code. | |
1da177e4 | 602 | */ |
877211f5 | 603 | int snd_interval_refine(struct snd_interval *i, const struct snd_interval *v) |
1da177e4 LT |
604 | { |
605 | int changed = 0; | |
7eaa943c TI |
606 | if (snd_BUG_ON(snd_interval_empty(i))) |
607 | return -EINVAL; | |
1da177e4 LT |
608 | if (i->min < v->min) { |
609 | i->min = v->min; | |
610 | i->openmin = v->openmin; | |
611 | changed = 1; | |
612 | } else if (i->min == v->min && !i->openmin && v->openmin) { | |
613 | i->openmin = 1; | |
614 | changed = 1; | |
615 | } | |
616 | if (i->max > v->max) { | |
617 | i->max = v->max; | |
618 | i->openmax = v->openmax; | |
619 | changed = 1; | |
620 | } else if (i->max == v->max && !i->openmax && v->openmax) { | |
621 | i->openmax = 1; | |
622 | changed = 1; | |
623 | } | |
624 | if (!i->integer && v->integer) { | |
625 | i->integer = 1; | |
626 | changed = 1; | |
627 | } | |
628 | if (i->integer) { | |
629 | if (i->openmin) { | |
630 | i->min++; | |
631 | i->openmin = 0; | |
632 | } | |
633 | if (i->openmax) { | |
634 | i->max--; | |
635 | i->openmax = 0; | |
636 | } | |
637 | } else if (!i->openmin && !i->openmax && i->min == i->max) | |
638 | i->integer = 1; | |
639 | if (snd_interval_checkempty(i)) { | |
640 | snd_interval_none(i); | |
641 | return -EINVAL; | |
642 | } | |
643 | return changed; | |
644 | } | |
645 | ||
e88e8ae6 TI |
646 | EXPORT_SYMBOL(snd_interval_refine); |
647 | ||
877211f5 | 648 | static int snd_interval_refine_first(struct snd_interval *i) |
1da177e4 | 649 | { |
7eaa943c TI |
650 | if (snd_BUG_ON(snd_interval_empty(i))) |
651 | return -EINVAL; | |
1da177e4 LT |
652 | if (snd_interval_single(i)) |
653 | return 0; | |
654 | i->max = i->min; | |
655 | i->openmax = i->openmin; | |
656 | if (i->openmax) | |
657 | i->max++; | |
658 | return 1; | |
659 | } | |
660 | ||
877211f5 | 661 | static int snd_interval_refine_last(struct snd_interval *i) |
1da177e4 | 662 | { |
7eaa943c TI |
663 | if (snd_BUG_ON(snd_interval_empty(i))) |
664 | return -EINVAL; | |
1da177e4 LT |
665 | if (snd_interval_single(i)) |
666 | return 0; | |
667 | i->min = i->max; | |
668 | i->openmin = i->openmax; | |
669 | if (i->openmin) | |
670 | i->min--; | |
671 | return 1; | |
672 | } | |
673 | ||
877211f5 | 674 | void snd_interval_mul(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c) |
1da177e4 LT |
675 | { |
676 | if (a->empty || b->empty) { | |
677 | snd_interval_none(c); | |
678 | return; | |
679 | } | |
680 | c->empty = 0; | |
681 | c->min = mul(a->min, b->min); | |
682 | c->openmin = (a->openmin || b->openmin); | |
683 | c->max = mul(a->max, b->max); | |
684 | c->openmax = (a->openmax || b->openmax); | |
685 | c->integer = (a->integer && b->integer); | |
686 | } | |
687 | ||
688 | /** | |
689 | * snd_interval_div - refine the interval value with division | |
df8db936 TI |
690 | * @a: dividend |
691 | * @b: divisor | |
692 | * @c: quotient | |
1da177e4 LT |
693 | * |
694 | * c = a / b | |
695 | * | |
696 | * Returns non-zero if the value is changed, zero if not changed. | |
697 | */ | |
877211f5 | 698 | void snd_interval_div(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c) |
1da177e4 LT |
699 | { |
700 | unsigned int r; | |
701 | if (a->empty || b->empty) { | |
702 | snd_interval_none(c); | |
703 | return; | |
704 | } | |
705 | c->empty = 0; | |
706 | c->min = div32(a->min, b->max, &r); | |
707 | c->openmin = (r || a->openmin || b->openmax); | |
708 | if (b->min > 0) { | |
709 | c->max = div32(a->max, b->min, &r); | |
710 | if (r) { | |
711 | c->max++; | |
712 | c->openmax = 1; | |
713 | } else | |
714 | c->openmax = (a->openmax || b->openmin); | |
715 | } else { | |
716 | c->max = UINT_MAX; | |
717 | c->openmax = 0; | |
718 | } | |
719 | c->integer = 0; | |
720 | } | |
721 | ||
722 | /** | |
723 | * snd_interval_muldivk - refine the interval value | |
df8db936 TI |
724 | * @a: dividend 1 |
725 | * @b: dividend 2 | |
726 | * @k: divisor (as integer) | |
727 | * @c: result | |
728 | * | |
1da177e4 LT |
729 | * c = a * b / k |
730 | * | |
731 | * Returns non-zero if the value is changed, zero if not changed. | |
732 | */ | |
877211f5 TI |
733 | void snd_interval_muldivk(const struct snd_interval *a, const struct snd_interval *b, |
734 | unsigned int k, struct snd_interval *c) | |
1da177e4 LT |
735 | { |
736 | unsigned int r; | |
737 | if (a->empty || b->empty) { | |
738 | snd_interval_none(c); | |
739 | return; | |
740 | } | |
741 | c->empty = 0; | |
742 | c->min = muldiv32(a->min, b->min, k, &r); | |
743 | c->openmin = (r || a->openmin || b->openmin); | |
744 | c->max = muldiv32(a->max, b->max, k, &r); | |
745 | if (r) { | |
746 | c->max++; | |
747 | c->openmax = 1; | |
748 | } else | |
749 | c->openmax = (a->openmax || b->openmax); | |
750 | c->integer = 0; | |
751 | } | |
752 | ||
753 | /** | |
754 | * snd_interval_mulkdiv - refine the interval value | |
df8db936 TI |
755 | * @a: dividend 1 |
756 | * @k: dividend 2 (as integer) | |
757 | * @b: divisor | |
758 | * @c: result | |
1da177e4 LT |
759 | * |
760 | * c = a * k / b | |
761 | * | |
762 | * Returns non-zero if the value is changed, zero if not changed. | |
763 | */ | |
877211f5 TI |
764 | void snd_interval_mulkdiv(const struct snd_interval *a, unsigned int k, |
765 | const struct snd_interval *b, struct snd_interval *c) | |
1da177e4 LT |
766 | { |
767 | unsigned int r; | |
768 | if (a->empty || b->empty) { | |
769 | snd_interval_none(c); | |
770 | return; | |
771 | } | |
772 | c->empty = 0; | |
773 | c->min = muldiv32(a->min, k, b->max, &r); | |
774 | c->openmin = (r || a->openmin || b->openmax); | |
775 | if (b->min > 0) { | |
776 | c->max = muldiv32(a->max, k, b->min, &r); | |
777 | if (r) { | |
778 | c->max++; | |
779 | c->openmax = 1; | |
780 | } else | |
781 | c->openmax = (a->openmax || b->openmin); | |
782 | } else { | |
783 | c->max = UINT_MAX; | |
784 | c->openmax = 0; | |
785 | } | |
786 | c->integer = 0; | |
787 | } | |
788 | ||
1da177e4 LT |
789 | /* ---- */ |
790 | ||
791 | ||
792 | /** | |
793 | * snd_interval_ratnum - refine the interval value | |
df8db936 TI |
794 | * @i: interval to refine |
795 | * @rats_count: number of ratnum_t | |
796 | * @rats: ratnum_t array | |
797 | * @nump: pointer to store the resultant numerator | |
798 | * @denp: pointer to store the resultant denominator | |
1da177e4 | 799 | * |
eb7c06e8 YB |
800 | * Return: Positive if the value is changed, zero if it's not changed, or a |
801 | * negative error code. | |
1da177e4 | 802 | */ |
877211f5 | 803 | int snd_interval_ratnum(struct snd_interval *i, |
e5e113cf | 804 | unsigned int rats_count, const struct snd_ratnum *rats, |
877211f5 | 805 | unsigned int *nump, unsigned int *denp) |
1da177e4 | 806 | { |
8374e24c KH |
807 | unsigned int best_num, best_den; |
808 | int best_diff; | |
1da177e4 | 809 | unsigned int k; |
877211f5 | 810 | struct snd_interval t; |
1da177e4 | 811 | int err; |
8374e24c KH |
812 | unsigned int result_num, result_den; |
813 | int result_diff; | |
1da177e4 LT |
814 | |
815 | best_num = best_den = best_diff = 0; | |
816 | for (k = 0; k < rats_count; ++k) { | |
817 | unsigned int num = rats[k].num; | |
818 | unsigned int den; | |
819 | unsigned int q = i->min; | |
820 | int diff; | |
821 | if (q == 0) | |
822 | q = 1; | |
40962d7c | 823 | den = div_up(num, q); |
1da177e4 LT |
824 | if (den < rats[k].den_min) |
825 | continue; | |
826 | if (den > rats[k].den_max) | |
827 | den = rats[k].den_max; | |
828 | else { | |
829 | unsigned int r; | |
830 | r = (den - rats[k].den_min) % rats[k].den_step; | |
831 | if (r != 0) | |
832 | den -= r; | |
833 | } | |
834 | diff = num - q * den; | |
8374e24c KH |
835 | if (diff < 0) |
836 | diff = -diff; | |
1da177e4 LT |
837 | if (best_num == 0 || |
838 | diff * best_den < best_diff * den) { | |
839 | best_diff = diff; | |
840 | best_den = den; | |
841 | best_num = num; | |
842 | } | |
843 | } | |
844 | if (best_den == 0) { | |
845 | i->empty = 1; | |
846 | return -EINVAL; | |
847 | } | |
848 | t.min = div_down(best_num, best_den); | |
849 | t.openmin = !!(best_num % best_den); | |
850 | ||
8374e24c KH |
851 | result_num = best_num; |
852 | result_diff = best_diff; | |
853 | result_den = best_den; | |
1da177e4 LT |
854 | best_num = best_den = best_diff = 0; |
855 | for (k = 0; k < rats_count; ++k) { | |
856 | unsigned int num = rats[k].num; | |
857 | unsigned int den; | |
858 | unsigned int q = i->max; | |
859 | int diff; | |
860 | if (q == 0) { | |
861 | i->empty = 1; | |
862 | return -EINVAL; | |
863 | } | |
40962d7c | 864 | den = div_down(num, q); |
1da177e4 LT |
865 | if (den > rats[k].den_max) |
866 | continue; | |
867 | if (den < rats[k].den_min) | |
868 | den = rats[k].den_min; | |
869 | else { | |
870 | unsigned int r; | |
871 | r = (den - rats[k].den_min) % rats[k].den_step; | |
872 | if (r != 0) | |
873 | den += rats[k].den_step - r; | |
874 | } | |
875 | diff = q * den - num; | |
8374e24c KH |
876 | if (diff < 0) |
877 | diff = -diff; | |
1da177e4 LT |
878 | if (best_num == 0 || |
879 | diff * best_den < best_diff * den) { | |
880 | best_diff = diff; | |
881 | best_den = den; | |
882 | best_num = num; | |
883 | } | |
884 | } | |
885 | if (best_den == 0) { | |
886 | i->empty = 1; | |
887 | return -EINVAL; | |
888 | } | |
889 | t.max = div_up(best_num, best_den); | |
890 | t.openmax = !!(best_num % best_den); | |
891 | t.integer = 0; | |
892 | err = snd_interval_refine(i, &t); | |
893 | if (err < 0) | |
894 | return err; | |
895 | ||
896 | if (snd_interval_single(i)) { | |
8374e24c KH |
897 | if (best_diff * result_den < result_diff * best_den) { |
898 | result_num = best_num; | |
899 | result_den = best_den; | |
900 | } | |
1da177e4 | 901 | if (nump) |
8374e24c | 902 | *nump = result_num; |
1da177e4 | 903 | if (denp) |
8374e24c | 904 | *denp = result_den; |
1da177e4 LT |
905 | } |
906 | return err; | |
907 | } | |
908 | ||
e88e8ae6 TI |
909 | EXPORT_SYMBOL(snd_interval_ratnum); |
910 | ||
1da177e4 LT |
911 | /** |
912 | * snd_interval_ratden - refine the interval value | |
df8db936 | 913 | * @i: interval to refine |
877211f5 TI |
914 | * @rats_count: number of struct ratden |
915 | * @rats: struct ratden array | |
df8db936 TI |
916 | * @nump: pointer to store the resultant numerator |
917 | * @denp: pointer to store the resultant denominator | |
1da177e4 | 918 | * |
eb7c06e8 YB |
919 | * Return: Positive if the value is changed, zero if it's not changed, or a |
920 | * negative error code. | |
1da177e4 | 921 | */ |
877211f5 | 922 | static int snd_interval_ratden(struct snd_interval *i, |
e5e113cf LPC |
923 | unsigned int rats_count, |
924 | const struct snd_ratden *rats, | |
1da177e4 LT |
925 | unsigned int *nump, unsigned int *denp) |
926 | { | |
927 | unsigned int best_num, best_diff, best_den; | |
928 | unsigned int k; | |
877211f5 | 929 | struct snd_interval t; |
1da177e4 LT |
930 | int err; |
931 | ||
932 | best_num = best_den = best_diff = 0; | |
933 | for (k = 0; k < rats_count; ++k) { | |
934 | unsigned int num; | |
935 | unsigned int den = rats[k].den; | |
936 | unsigned int q = i->min; | |
937 | int diff; | |
938 | num = mul(q, den); | |
939 | if (num > rats[k].num_max) | |
940 | continue; | |
941 | if (num < rats[k].num_min) | |
942 | num = rats[k].num_max; | |
943 | else { | |
944 | unsigned int r; | |
945 | r = (num - rats[k].num_min) % rats[k].num_step; | |
946 | if (r != 0) | |
947 | num += rats[k].num_step - r; | |
948 | } | |
949 | diff = num - q * den; | |
950 | if (best_num == 0 || | |
951 | diff * best_den < best_diff * den) { | |
952 | best_diff = diff; | |
953 | best_den = den; | |
954 | best_num = num; | |
955 | } | |
956 | } | |
957 | if (best_den == 0) { | |
958 | i->empty = 1; | |
959 | return -EINVAL; | |
960 | } | |
961 | t.min = div_down(best_num, best_den); | |
962 | t.openmin = !!(best_num % best_den); | |
963 | ||
964 | best_num = best_den = best_diff = 0; | |
965 | for (k = 0; k < rats_count; ++k) { | |
966 | unsigned int num; | |
967 | unsigned int den = rats[k].den; | |
968 | unsigned int q = i->max; | |
969 | int diff; | |
970 | num = mul(q, den); | |
971 | if (num < rats[k].num_min) | |
972 | continue; | |
973 | if (num > rats[k].num_max) | |
974 | num = rats[k].num_max; | |
975 | else { | |
976 | unsigned int r; | |
977 | r = (num - rats[k].num_min) % rats[k].num_step; | |
978 | if (r != 0) | |
979 | num -= r; | |
980 | } | |
981 | diff = q * den - num; | |
982 | if (best_num == 0 || | |
983 | diff * best_den < best_diff * den) { | |
984 | best_diff = diff; | |
985 | best_den = den; | |
986 | best_num = num; | |
987 | } | |
988 | } | |
989 | if (best_den == 0) { | |
990 | i->empty = 1; | |
991 | return -EINVAL; | |
992 | } | |
993 | t.max = div_up(best_num, best_den); | |
994 | t.openmax = !!(best_num % best_den); | |
995 | t.integer = 0; | |
996 | err = snd_interval_refine(i, &t); | |
997 | if (err < 0) | |
998 | return err; | |
999 | ||
1000 | if (snd_interval_single(i)) { | |
1001 | if (nump) | |
1002 | *nump = best_num; | |
1003 | if (denp) | |
1004 | *denp = best_den; | |
1005 | } | |
1006 | return err; | |
1007 | } | |
1008 | ||
1009 | /** | |
1010 | * snd_interval_list - refine the interval value from the list | |
1011 | * @i: the interval value to refine | |
1012 | * @count: the number of elements in the list | |
1013 | * @list: the value list | |
1014 | * @mask: the bit-mask to evaluate | |
1015 | * | |
1016 | * Refines the interval value from the list. | |
1017 | * When mask is non-zero, only the elements corresponding to bit 1 are | |
1018 | * evaluated. | |
1019 | * | |
eb7c06e8 YB |
1020 | * Return: Positive if the value is changed, zero if it's not changed, or a |
1021 | * negative error code. | |
1da177e4 | 1022 | */ |
4af87a93 MB |
1023 | int snd_interval_list(struct snd_interval *i, unsigned int count, |
1024 | const unsigned int *list, unsigned int mask) | |
1da177e4 LT |
1025 | { |
1026 | unsigned int k; | |
b1ddaf68 | 1027 | struct snd_interval list_range; |
0981a260 TI |
1028 | |
1029 | if (!count) { | |
1030 | i->empty = 1; | |
1031 | return -EINVAL; | |
1032 | } | |
b1ddaf68 CL |
1033 | snd_interval_any(&list_range); |
1034 | list_range.min = UINT_MAX; | |
1035 | list_range.max = 0; | |
1da177e4 LT |
1036 | for (k = 0; k < count; k++) { |
1037 | if (mask && !(mask & (1 << k))) | |
1038 | continue; | |
b1ddaf68 | 1039 | if (!snd_interval_test(i, list[k])) |
1da177e4 | 1040 | continue; |
b1ddaf68 CL |
1041 | list_range.min = min(list_range.min, list[k]); |
1042 | list_range.max = max(list_range.max, list[k]); | |
1da177e4 | 1043 | } |
b1ddaf68 | 1044 | return snd_interval_refine(i, &list_range); |
1da177e4 LT |
1045 | } |
1046 | ||
e88e8ae6 TI |
1047 | EXPORT_SYMBOL(snd_interval_list); |
1048 | ||
f66f898e PR |
1049 | /** |
1050 | * snd_interval_ranges - refine the interval value from the list of ranges | |
1051 | * @i: the interval value to refine | |
1052 | * @count: the number of elements in the list of ranges | |
1053 | * @ranges: the ranges list | |
1054 | * @mask: the bit-mask to evaluate | |
1055 | * | |
1056 | * Refines the interval value from the list of ranges. | |
1057 | * When mask is non-zero, only the elements corresponding to bit 1 are | |
1058 | * evaluated. | |
1059 | * | |
1060 | * Return: Positive if the value is changed, zero if it's not changed, or a | |
1061 | * negative error code. | |
1062 | */ | |
1063 | int snd_interval_ranges(struct snd_interval *i, unsigned int count, | |
1064 | const struct snd_interval *ranges, unsigned int mask) | |
1065 | { | |
1066 | unsigned int k; | |
1067 | struct snd_interval range_union; | |
1068 | struct snd_interval range; | |
1069 | ||
1070 | if (!count) { | |
1071 | snd_interval_none(i); | |
1072 | return -EINVAL; | |
1073 | } | |
1074 | snd_interval_any(&range_union); | |
1075 | range_union.min = UINT_MAX; | |
1076 | range_union.max = 0; | |
1077 | for (k = 0; k < count; k++) { | |
1078 | if (mask && !(mask & (1 << k))) | |
1079 | continue; | |
1080 | snd_interval_copy(&range, &ranges[k]); | |
1081 | if (snd_interval_refine(&range, i) < 0) | |
1082 | continue; | |
1083 | if (snd_interval_empty(&range)) | |
1084 | continue; | |
1085 | ||
1086 | if (range.min < range_union.min) { | |
1087 | range_union.min = range.min; | |
1088 | range_union.openmin = 1; | |
1089 | } | |
1090 | if (range.min == range_union.min && !range.openmin) | |
1091 | range_union.openmin = 0; | |
1092 | if (range.max > range_union.max) { | |
1093 | range_union.max = range.max; | |
1094 | range_union.openmax = 1; | |
1095 | } | |
1096 | if (range.max == range_union.max && !range.openmax) | |
1097 | range_union.openmax = 0; | |
1098 | } | |
1099 | return snd_interval_refine(i, &range_union); | |
1100 | } | |
1101 | EXPORT_SYMBOL(snd_interval_ranges); | |
1102 | ||
0f519b62 | 1103 | static int snd_interval_step(struct snd_interval *i, unsigned int step) |
1da177e4 LT |
1104 | { |
1105 | unsigned int n; | |
1106 | int changed = 0; | |
0f519b62 | 1107 | n = i->min % step; |
1da177e4 LT |
1108 | if (n != 0 || i->openmin) { |
1109 | i->min += step - n; | |
df1e4719 | 1110 | i->openmin = 0; |
1da177e4 LT |
1111 | changed = 1; |
1112 | } | |
0f519b62 | 1113 | n = i->max % step; |
1da177e4 LT |
1114 | if (n != 0 || i->openmax) { |
1115 | i->max -= n; | |
df1e4719 | 1116 | i->openmax = 0; |
1da177e4 LT |
1117 | changed = 1; |
1118 | } | |
1119 | if (snd_interval_checkempty(i)) { | |
1120 | i->empty = 1; | |
1121 | return -EINVAL; | |
1122 | } | |
1123 | return changed; | |
1124 | } | |
1125 | ||
1126 | /* Info constraints helpers */ | |
1127 | ||
1128 | /** | |
1129 | * snd_pcm_hw_rule_add - add the hw-constraint rule | |
1130 | * @runtime: the pcm runtime instance | |
1131 | * @cond: condition bits | |
1132 | * @var: the variable to evaluate | |
1133 | * @func: the evaluation function | |
1134 | * @private: the private data pointer passed to function | |
1135 | * @dep: the dependent variables | |
1136 | * | |
eb7c06e8 | 1137 | * Return: Zero if successful, or a negative error code on failure. |
1da177e4 | 1138 | */ |
877211f5 | 1139 | int snd_pcm_hw_rule_add(struct snd_pcm_runtime *runtime, unsigned int cond, |
1da177e4 LT |
1140 | int var, |
1141 | snd_pcm_hw_rule_func_t func, void *private, | |
1142 | int dep, ...) | |
1143 | { | |
877211f5 TI |
1144 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; |
1145 | struct snd_pcm_hw_rule *c; | |
1da177e4 LT |
1146 | unsigned int k; |
1147 | va_list args; | |
1148 | va_start(args, dep); | |
1149 | if (constrs->rules_num >= constrs->rules_all) { | |
877211f5 | 1150 | struct snd_pcm_hw_rule *new; |
1da177e4 LT |
1151 | unsigned int new_rules = constrs->rules_all + 16; |
1152 | new = kcalloc(new_rules, sizeof(*c), GFP_KERNEL); | |
87a1c8aa JJ |
1153 | if (!new) { |
1154 | va_end(args); | |
1da177e4 | 1155 | return -ENOMEM; |
87a1c8aa | 1156 | } |
1da177e4 LT |
1157 | if (constrs->rules) { |
1158 | memcpy(new, constrs->rules, | |
1159 | constrs->rules_num * sizeof(*c)); | |
1160 | kfree(constrs->rules); | |
1161 | } | |
1162 | constrs->rules = new; | |
1163 | constrs->rules_all = new_rules; | |
1164 | } | |
1165 | c = &constrs->rules[constrs->rules_num]; | |
1166 | c->cond = cond; | |
1167 | c->func = func; | |
1168 | c->var = var; | |
1169 | c->private = private; | |
1170 | k = 0; | |
1171 | while (1) { | |
87a1c8aa JJ |
1172 | if (snd_BUG_ON(k >= ARRAY_SIZE(c->deps))) { |
1173 | va_end(args); | |
7eaa943c | 1174 | return -EINVAL; |
87a1c8aa | 1175 | } |
1da177e4 LT |
1176 | c->deps[k++] = dep; |
1177 | if (dep < 0) | |
1178 | break; | |
1179 | dep = va_arg(args, int); | |
1180 | } | |
1181 | constrs->rules_num++; | |
1182 | va_end(args); | |
1183 | return 0; | |
87a1c8aa | 1184 | } |
1da177e4 | 1185 | |
e88e8ae6 TI |
1186 | EXPORT_SYMBOL(snd_pcm_hw_rule_add); |
1187 | ||
1da177e4 | 1188 | /** |
1c85cc64 | 1189 | * snd_pcm_hw_constraint_mask - apply the given bitmap mask constraint |
df8db936 TI |
1190 | * @runtime: PCM runtime instance |
1191 | * @var: hw_params variable to apply the mask | |
1192 | * @mask: the bitmap mask | |
1193 | * | |
1c85cc64 | 1194 | * Apply the constraint of the given bitmap mask to a 32-bit mask parameter. |
eb7c06e8 YB |
1195 | * |
1196 | * Return: Zero if successful, or a negative error code on failure. | |
1da177e4 | 1197 | */ |
877211f5 | 1198 | int snd_pcm_hw_constraint_mask(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, |
1da177e4 LT |
1199 | u_int32_t mask) |
1200 | { | |
877211f5 TI |
1201 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; |
1202 | struct snd_mask *maskp = constrs_mask(constrs, var); | |
1da177e4 LT |
1203 | *maskp->bits &= mask; |
1204 | memset(maskp->bits + 1, 0, (SNDRV_MASK_MAX-32) / 8); /* clear rest */ | |
1205 | if (*maskp->bits == 0) | |
1206 | return -EINVAL; | |
1207 | return 0; | |
1208 | } | |
1209 | ||
1210 | /** | |
1c85cc64 | 1211 | * snd_pcm_hw_constraint_mask64 - apply the given bitmap mask constraint |
df8db936 TI |
1212 | * @runtime: PCM runtime instance |
1213 | * @var: hw_params variable to apply the mask | |
1214 | * @mask: the 64bit bitmap mask | |
1215 | * | |
1c85cc64 | 1216 | * Apply the constraint of the given bitmap mask to a 64-bit mask parameter. |
eb7c06e8 YB |
1217 | * |
1218 | * Return: Zero if successful, or a negative error code on failure. | |
1da177e4 | 1219 | */ |
877211f5 | 1220 | int snd_pcm_hw_constraint_mask64(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, |
1da177e4 LT |
1221 | u_int64_t mask) |
1222 | { | |
877211f5 TI |
1223 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; |
1224 | struct snd_mask *maskp = constrs_mask(constrs, var); | |
1da177e4 LT |
1225 | maskp->bits[0] &= (u_int32_t)mask; |
1226 | maskp->bits[1] &= (u_int32_t)(mask >> 32); | |
1227 | memset(maskp->bits + 2, 0, (SNDRV_MASK_MAX-64) / 8); /* clear rest */ | |
1228 | if (! maskp->bits[0] && ! maskp->bits[1]) | |
1229 | return -EINVAL; | |
1230 | return 0; | |
1231 | } | |
63a5d4c6 | 1232 | EXPORT_SYMBOL(snd_pcm_hw_constraint_mask64); |
1da177e4 LT |
1233 | |
1234 | /** | |
1c85cc64 | 1235 | * snd_pcm_hw_constraint_integer - apply an integer constraint to an interval |
df8db936 TI |
1236 | * @runtime: PCM runtime instance |
1237 | * @var: hw_params variable to apply the integer constraint | |
1238 | * | |
1239 | * Apply the constraint of integer to an interval parameter. | |
eb7c06e8 YB |
1240 | * |
1241 | * Return: Positive if the value is changed, zero if it's not changed, or a | |
1242 | * negative error code. | |
1da177e4 | 1243 | */ |
877211f5 | 1244 | int snd_pcm_hw_constraint_integer(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var) |
1da177e4 | 1245 | { |
877211f5 | 1246 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; |
1da177e4 LT |
1247 | return snd_interval_setinteger(constrs_interval(constrs, var)); |
1248 | } | |
1249 | ||
e88e8ae6 TI |
1250 | EXPORT_SYMBOL(snd_pcm_hw_constraint_integer); |
1251 | ||
1da177e4 | 1252 | /** |
1c85cc64 | 1253 | * snd_pcm_hw_constraint_minmax - apply a min/max range constraint to an interval |
df8db936 TI |
1254 | * @runtime: PCM runtime instance |
1255 | * @var: hw_params variable to apply the range | |
1256 | * @min: the minimal value | |
1257 | * @max: the maximal value | |
1258 | * | |
1259 | * Apply the min/max range constraint to an interval parameter. | |
eb7c06e8 YB |
1260 | * |
1261 | * Return: Positive if the value is changed, zero if it's not changed, or a | |
1262 | * negative error code. | |
1da177e4 | 1263 | */ |
877211f5 | 1264 | int snd_pcm_hw_constraint_minmax(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, |
1da177e4 LT |
1265 | unsigned int min, unsigned int max) |
1266 | { | |
877211f5 TI |
1267 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; |
1268 | struct snd_interval t; | |
1da177e4 LT |
1269 | t.min = min; |
1270 | t.max = max; | |
1271 | t.openmin = t.openmax = 0; | |
1272 | t.integer = 0; | |
1273 | return snd_interval_refine(constrs_interval(constrs, var), &t); | |
1274 | } | |
1275 | ||
e88e8ae6 TI |
1276 | EXPORT_SYMBOL(snd_pcm_hw_constraint_minmax); |
1277 | ||
877211f5 TI |
1278 | static int snd_pcm_hw_rule_list(struct snd_pcm_hw_params *params, |
1279 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 1280 | { |
877211f5 | 1281 | struct snd_pcm_hw_constraint_list *list = rule->private; |
1da177e4 LT |
1282 | return snd_interval_list(hw_param_interval(params, rule->var), list->count, list->list, list->mask); |
1283 | } | |
1284 | ||
1285 | ||
1286 | /** | |
1c85cc64 | 1287 | * snd_pcm_hw_constraint_list - apply a list of constraints to a parameter |
df8db936 TI |
1288 | * @runtime: PCM runtime instance |
1289 | * @cond: condition bits | |
1290 | * @var: hw_params variable to apply the list constraint | |
1291 | * @l: list | |
1292 | * | |
1293 | * Apply the list of constraints to an interval parameter. | |
eb7c06e8 YB |
1294 | * |
1295 | * Return: Zero if successful, or a negative error code on failure. | |
1da177e4 | 1296 | */ |
877211f5 | 1297 | int snd_pcm_hw_constraint_list(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1298 | unsigned int cond, |
1299 | snd_pcm_hw_param_t var, | |
1464189f | 1300 | const struct snd_pcm_hw_constraint_list *l) |
1da177e4 LT |
1301 | { |
1302 | return snd_pcm_hw_rule_add(runtime, cond, var, | |
1464189f | 1303 | snd_pcm_hw_rule_list, (void *)l, |
1da177e4 LT |
1304 | var, -1); |
1305 | } | |
1306 | ||
e88e8ae6 TI |
1307 | EXPORT_SYMBOL(snd_pcm_hw_constraint_list); |
1308 | ||
f66f898e PR |
1309 | static int snd_pcm_hw_rule_ranges(struct snd_pcm_hw_params *params, |
1310 | struct snd_pcm_hw_rule *rule) | |
1311 | { | |
1312 | struct snd_pcm_hw_constraint_ranges *r = rule->private; | |
1313 | return snd_interval_ranges(hw_param_interval(params, rule->var), | |
1314 | r->count, r->ranges, r->mask); | |
1315 | } | |
1316 | ||
1317 | ||
1318 | /** | |
1319 | * snd_pcm_hw_constraint_ranges - apply list of range constraints to a parameter | |
1320 | * @runtime: PCM runtime instance | |
1321 | * @cond: condition bits | |
1322 | * @var: hw_params variable to apply the list of range constraints | |
1323 | * @r: ranges | |
1324 | * | |
1325 | * Apply the list of range constraints to an interval parameter. | |
1326 | * | |
1327 | * Return: Zero if successful, or a negative error code on failure. | |
1328 | */ | |
1329 | int snd_pcm_hw_constraint_ranges(struct snd_pcm_runtime *runtime, | |
1330 | unsigned int cond, | |
1331 | snd_pcm_hw_param_t var, | |
1332 | const struct snd_pcm_hw_constraint_ranges *r) | |
1333 | { | |
1334 | return snd_pcm_hw_rule_add(runtime, cond, var, | |
1335 | snd_pcm_hw_rule_ranges, (void *)r, | |
1336 | var, -1); | |
1337 | } | |
1338 | EXPORT_SYMBOL(snd_pcm_hw_constraint_ranges); | |
1339 | ||
877211f5 TI |
1340 | static int snd_pcm_hw_rule_ratnums(struct snd_pcm_hw_params *params, |
1341 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 1342 | { |
e5e113cf | 1343 | const struct snd_pcm_hw_constraint_ratnums *r = rule->private; |
1da177e4 LT |
1344 | unsigned int num = 0, den = 0; |
1345 | int err; | |
1346 | err = snd_interval_ratnum(hw_param_interval(params, rule->var), | |
1347 | r->nrats, r->rats, &num, &den); | |
1348 | if (err >= 0 && den && rule->var == SNDRV_PCM_HW_PARAM_RATE) { | |
1349 | params->rate_num = num; | |
1350 | params->rate_den = den; | |
1351 | } | |
1352 | return err; | |
1353 | } | |
1354 | ||
1355 | /** | |
1c85cc64 | 1356 | * snd_pcm_hw_constraint_ratnums - apply ratnums constraint to a parameter |
df8db936 TI |
1357 | * @runtime: PCM runtime instance |
1358 | * @cond: condition bits | |
1359 | * @var: hw_params variable to apply the ratnums constraint | |
877211f5 | 1360 | * @r: struct snd_ratnums constriants |
eb7c06e8 YB |
1361 | * |
1362 | * Return: Zero if successful, or a negative error code on failure. | |
1da177e4 | 1363 | */ |
877211f5 | 1364 | int snd_pcm_hw_constraint_ratnums(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1365 | unsigned int cond, |
1366 | snd_pcm_hw_param_t var, | |
e5e113cf | 1367 | const struct snd_pcm_hw_constraint_ratnums *r) |
1da177e4 LT |
1368 | { |
1369 | return snd_pcm_hw_rule_add(runtime, cond, var, | |
e5e113cf | 1370 | snd_pcm_hw_rule_ratnums, (void *)r, |
1da177e4 LT |
1371 | var, -1); |
1372 | } | |
1373 | ||
e88e8ae6 TI |
1374 | EXPORT_SYMBOL(snd_pcm_hw_constraint_ratnums); |
1375 | ||
877211f5 TI |
1376 | static int snd_pcm_hw_rule_ratdens(struct snd_pcm_hw_params *params, |
1377 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 1378 | { |
e5e113cf | 1379 | const struct snd_pcm_hw_constraint_ratdens *r = rule->private; |
1da177e4 LT |
1380 | unsigned int num = 0, den = 0; |
1381 | int err = snd_interval_ratden(hw_param_interval(params, rule->var), | |
1382 | r->nrats, r->rats, &num, &den); | |
1383 | if (err >= 0 && den && rule->var == SNDRV_PCM_HW_PARAM_RATE) { | |
1384 | params->rate_num = num; | |
1385 | params->rate_den = den; | |
1386 | } | |
1387 | return err; | |
1388 | } | |
1389 | ||
1390 | /** | |
1c85cc64 | 1391 | * snd_pcm_hw_constraint_ratdens - apply ratdens constraint to a parameter |
df8db936 TI |
1392 | * @runtime: PCM runtime instance |
1393 | * @cond: condition bits | |
1394 | * @var: hw_params variable to apply the ratdens constraint | |
877211f5 | 1395 | * @r: struct snd_ratdens constriants |
eb7c06e8 YB |
1396 | * |
1397 | * Return: Zero if successful, or a negative error code on failure. | |
1da177e4 | 1398 | */ |
877211f5 | 1399 | int snd_pcm_hw_constraint_ratdens(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1400 | unsigned int cond, |
1401 | snd_pcm_hw_param_t var, | |
e5e113cf | 1402 | const struct snd_pcm_hw_constraint_ratdens *r) |
1da177e4 LT |
1403 | { |
1404 | return snd_pcm_hw_rule_add(runtime, cond, var, | |
e5e113cf | 1405 | snd_pcm_hw_rule_ratdens, (void *)r, |
1da177e4 LT |
1406 | var, -1); |
1407 | } | |
1408 | ||
e88e8ae6 TI |
1409 | EXPORT_SYMBOL(snd_pcm_hw_constraint_ratdens); |
1410 | ||
877211f5 TI |
1411 | static int snd_pcm_hw_rule_msbits(struct snd_pcm_hw_params *params, |
1412 | struct snd_pcm_hw_rule *rule) | |
1da177e4 LT |
1413 | { |
1414 | unsigned int l = (unsigned long) rule->private; | |
1415 | int width = l & 0xffff; | |
1416 | unsigned int msbits = l >> 16; | |
877211f5 | 1417 | struct snd_interval *i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS); |
8ef9df55 LPC |
1418 | |
1419 | if (!snd_interval_single(i)) | |
1420 | return 0; | |
1421 | ||
1422 | if ((snd_interval_value(i) == width) || | |
1423 | (width == 0 && snd_interval_value(i) > msbits)) | |
19f52fae | 1424 | params->msbits = min_not_zero(params->msbits, msbits); |
8ef9df55 | 1425 | |
1da177e4 LT |
1426 | return 0; |
1427 | } | |
1428 | ||
1429 | /** | |
1c85cc64 | 1430 | * snd_pcm_hw_constraint_msbits - add a hw constraint msbits rule |
df8db936 TI |
1431 | * @runtime: PCM runtime instance |
1432 | * @cond: condition bits | |
1433 | * @width: sample bits width | |
1434 | * @msbits: msbits width | |
eb7c06e8 | 1435 | * |
8ef9df55 LPC |
1436 | * This constraint will set the number of most significant bits (msbits) if a |
1437 | * sample format with the specified width has been select. If width is set to 0 | |
1438 | * the msbits will be set for any sample format with a width larger than the | |
1439 | * specified msbits. | |
1440 | * | |
eb7c06e8 | 1441 | * Return: Zero if successful, or a negative error code on failure. |
1da177e4 | 1442 | */ |
877211f5 | 1443 | int snd_pcm_hw_constraint_msbits(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1444 | unsigned int cond, |
1445 | unsigned int width, | |
1446 | unsigned int msbits) | |
1447 | { | |
1448 | unsigned long l = (msbits << 16) | width; | |
1449 | return snd_pcm_hw_rule_add(runtime, cond, -1, | |
1450 | snd_pcm_hw_rule_msbits, | |
1451 | (void*) l, | |
1452 | SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); | |
1453 | } | |
1454 | ||
e88e8ae6 TI |
1455 | EXPORT_SYMBOL(snd_pcm_hw_constraint_msbits); |
1456 | ||
877211f5 TI |
1457 | static int snd_pcm_hw_rule_step(struct snd_pcm_hw_params *params, |
1458 | struct snd_pcm_hw_rule *rule) | |
1da177e4 LT |
1459 | { |
1460 | unsigned long step = (unsigned long) rule->private; | |
0f519b62 | 1461 | return snd_interval_step(hw_param_interval(params, rule->var), step); |
1da177e4 LT |
1462 | } |
1463 | ||
1464 | /** | |
1c85cc64 | 1465 | * snd_pcm_hw_constraint_step - add a hw constraint step rule |
df8db936 TI |
1466 | * @runtime: PCM runtime instance |
1467 | * @cond: condition bits | |
1468 | * @var: hw_params variable to apply the step constraint | |
1469 | * @step: step size | |
eb7c06e8 YB |
1470 | * |
1471 | * Return: Zero if successful, or a negative error code on failure. | |
1da177e4 | 1472 | */ |
877211f5 | 1473 | int snd_pcm_hw_constraint_step(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1474 | unsigned int cond, |
1475 | snd_pcm_hw_param_t var, | |
1476 | unsigned long step) | |
1477 | { | |
1478 | return snd_pcm_hw_rule_add(runtime, cond, var, | |
1479 | snd_pcm_hw_rule_step, (void *) step, | |
1480 | var, -1); | |
1481 | } | |
1482 | ||
e88e8ae6 TI |
1483 | EXPORT_SYMBOL(snd_pcm_hw_constraint_step); |
1484 | ||
877211f5 | 1485 | static int snd_pcm_hw_rule_pow2(struct snd_pcm_hw_params *params, struct snd_pcm_hw_rule *rule) |
1da177e4 | 1486 | { |
67c39317 | 1487 | static unsigned int pow2_sizes[] = { |
1da177e4 LT |
1488 | 1<<0, 1<<1, 1<<2, 1<<3, 1<<4, 1<<5, 1<<6, 1<<7, |
1489 | 1<<8, 1<<9, 1<<10, 1<<11, 1<<12, 1<<13, 1<<14, 1<<15, | |
1490 | 1<<16, 1<<17, 1<<18, 1<<19, 1<<20, 1<<21, 1<<22, 1<<23, | |
1491 | 1<<24, 1<<25, 1<<26, 1<<27, 1<<28, 1<<29, 1<<30 | |
1492 | }; | |
1493 | return snd_interval_list(hw_param_interval(params, rule->var), | |
1494 | ARRAY_SIZE(pow2_sizes), pow2_sizes, 0); | |
1495 | } | |
1496 | ||
1497 | /** | |
1c85cc64 | 1498 | * snd_pcm_hw_constraint_pow2 - add a hw constraint power-of-2 rule |
df8db936 TI |
1499 | * @runtime: PCM runtime instance |
1500 | * @cond: condition bits | |
1501 | * @var: hw_params variable to apply the power-of-2 constraint | |
eb7c06e8 YB |
1502 | * |
1503 | * Return: Zero if successful, or a negative error code on failure. | |
1da177e4 | 1504 | */ |
877211f5 | 1505 | int snd_pcm_hw_constraint_pow2(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1506 | unsigned int cond, |
1507 | snd_pcm_hw_param_t var) | |
1508 | { | |
1509 | return snd_pcm_hw_rule_add(runtime, cond, var, | |
1510 | snd_pcm_hw_rule_pow2, NULL, | |
1511 | var, -1); | |
1512 | } | |
1513 | ||
e88e8ae6 TI |
1514 | EXPORT_SYMBOL(snd_pcm_hw_constraint_pow2); |
1515 | ||
d5b702a6 CL |
1516 | static int snd_pcm_hw_rule_noresample_func(struct snd_pcm_hw_params *params, |
1517 | struct snd_pcm_hw_rule *rule) | |
1518 | { | |
1519 | unsigned int base_rate = (unsigned int)(uintptr_t)rule->private; | |
1520 | struct snd_interval *rate; | |
1521 | ||
1522 | rate = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE); | |
1523 | return snd_interval_list(rate, 1, &base_rate, 0); | |
1524 | } | |
1525 | ||
1526 | /** | |
1527 | * snd_pcm_hw_rule_noresample - add a rule to allow disabling hw resampling | |
1528 | * @runtime: PCM runtime instance | |
1529 | * @base_rate: the rate at which the hardware does not resample | |
eb7c06e8 YB |
1530 | * |
1531 | * Return: Zero if successful, or a negative error code on failure. | |
d5b702a6 CL |
1532 | */ |
1533 | int snd_pcm_hw_rule_noresample(struct snd_pcm_runtime *runtime, | |
1534 | unsigned int base_rate) | |
1535 | { | |
1536 | return snd_pcm_hw_rule_add(runtime, SNDRV_PCM_HW_PARAMS_NORESAMPLE, | |
1537 | SNDRV_PCM_HW_PARAM_RATE, | |
1538 | snd_pcm_hw_rule_noresample_func, | |
1539 | (void *)(uintptr_t)base_rate, | |
1540 | SNDRV_PCM_HW_PARAM_RATE, -1); | |
1541 | } | |
1542 | EXPORT_SYMBOL(snd_pcm_hw_rule_noresample); | |
1543 | ||
877211f5 | 1544 | static void _snd_pcm_hw_param_any(struct snd_pcm_hw_params *params, |
123992f7 | 1545 | snd_pcm_hw_param_t var) |
1da177e4 LT |
1546 | { |
1547 | if (hw_is_mask(var)) { | |
1548 | snd_mask_any(hw_param_mask(params, var)); | |
1549 | params->cmask |= 1 << var; | |
1550 | params->rmask |= 1 << var; | |
1551 | return; | |
1552 | } | |
1553 | if (hw_is_interval(var)) { | |
1554 | snd_interval_any(hw_param_interval(params, var)); | |
1555 | params->cmask |= 1 << var; | |
1556 | params->rmask |= 1 << var; | |
1557 | return; | |
1558 | } | |
1559 | snd_BUG(); | |
1560 | } | |
1561 | ||
877211f5 | 1562 | void _snd_pcm_hw_params_any(struct snd_pcm_hw_params *params) |
1da177e4 LT |
1563 | { |
1564 | unsigned int k; | |
1565 | memset(params, 0, sizeof(*params)); | |
1566 | for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) | |
1567 | _snd_pcm_hw_param_any(params, k); | |
1568 | for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) | |
1569 | _snd_pcm_hw_param_any(params, k); | |
1570 | params->info = ~0U; | |
1571 | } | |
1572 | ||
e88e8ae6 | 1573 | EXPORT_SYMBOL(_snd_pcm_hw_params_any); |
1da177e4 LT |
1574 | |
1575 | /** | |
1c85cc64 | 1576 | * snd_pcm_hw_param_value - return @params field @var value |
df8db936 TI |
1577 | * @params: the hw_params instance |
1578 | * @var: parameter to retrieve | |
1c85cc64 | 1579 | * @dir: pointer to the direction (-1,0,1) or %NULL |
1da177e4 | 1580 | * |
eb7c06e8 YB |
1581 | * Return: The value for field @var if it's fixed in configuration space |
1582 | * defined by @params. -%EINVAL otherwise. | |
1da177e4 | 1583 | */ |
e88e8ae6 TI |
1584 | int snd_pcm_hw_param_value(const struct snd_pcm_hw_params *params, |
1585 | snd_pcm_hw_param_t var, int *dir) | |
1da177e4 LT |
1586 | { |
1587 | if (hw_is_mask(var)) { | |
877211f5 | 1588 | const struct snd_mask *mask = hw_param_mask_c(params, var); |
1da177e4 LT |
1589 | if (!snd_mask_single(mask)) |
1590 | return -EINVAL; | |
1591 | if (dir) | |
1592 | *dir = 0; | |
1593 | return snd_mask_value(mask); | |
1594 | } | |
1595 | if (hw_is_interval(var)) { | |
877211f5 | 1596 | const struct snd_interval *i = hw_param_interval_c(params, var); |
1da177e4 LT |
1597 | if (!snd_interval_single(i)) |
1598 | return -EINVAL; | |
1599 | if (dir) | |
1600 | *dir = i->openmin; | |
1601 | return snd_interval_value(i); | |
1602 | } | |
1da177e4 LT |
1603 | return -EINVAL; |
1604 | } | |
1605 | ||
e88e8ae6 | 1606 | EXPORT_SYMBOL(snd_pcm_hw_param_value); |
1da177e4 | 1607 | |
877211f5 | 1608 | void _snd_pcm_hw_param_setempty(struct snd_pcm_hw_params *params, |
1da177e4 LT |
1609 | snd_pcm_hw_param_t var) |
1610 | { | |
1611 | if (hw_is_mask(var)) { | |
1612 | snd_mask_none(hw_param_mask(params, var)); | |
1613 | params->cmask |= 1 << var; | |
1614 | params->rmask |= 1 << var; | |
1615 | } else if (hw_is_interval(var)) { | |
1616 | snd_interval_none(hw_param_interval(params, var)); | |
1617 | params->cmask |= 1 << var; | |
1618 | params->rmask |= 1 << var; | |
1619 | } else { | |
1620 | snd_BUG(); | |
1621 | } | |
1622 | } | |
1623 | ||
e88e8ae6 | 1624 | EXPORT_SYMBOL(_snd_pcm_hw_param_setempty); |
1da177e4 | 1625 | |
877211f5 | 1626 | static int _snd_pcm_hw_param_first(struct snd_pcm_hw_params *params, |
123992f7 | 1627 | snd_pcm_hw_param_t var) |
1da177e4 LT |
1628 | { |
1629 | int changed; | |
1630 | if (hw_is_mask(var)) | |
1631 | changed = snd_mask_refine_first(hw_param_mask(params, var)); | |
1632 | else if (hw_is_interval(var)) | |
1633 | changed = snd_interval_refine_first(hw_param_interval(params, var)); | |
2f4ca8e5 | 1634 | else |
1da177e4 | 1635 | return -EINVAL; |
1da177e4 LT |
1636 | if (changed) { |
1637 | params->cmask |= 1 << var; | |
1638 | params->rmask |= 1 << var; | |
1639 | } | |
1640 | return changed; | |
1641 | } | |
1642 | ||
1643 | ||
1644 | /** | |
1c85cc64 | 1645 | * snd_pcm_hw_param_first - refine config space and return minimum value |
df8db936 TI |
1646 | * @pcm: PCM instance |
1647 | * @params: the hw_params instance | |
1648 | * @var: parameter to retrieve | |
1c85cc64 | 1649 | * @dir: pointer to the direction (-1,0,1) or %NULL |
1da177e4 | 1650 | * |
1c85cc64 | 1651 | * Inside configuration space defined by @params remove from @var all |
1da177e4 | 1652 | * values > minimum. Reduce configuration space accordingly. |
eb7c06e8 YB |
1653 | * |
1654 | * Return: The minimum, or a negative error code on failure. | |
1da177e4 | 1655 | */ |
e88e8ae6 TI |
1656 | int snd_pcm_hw_param_first(struct snd_pcm_substream *pcm, |
1657 | struct snd_pcm_hw_params *params, | |
1658 | snd_pcm_hw_param_t var, int *dir) | |
1da177e4 LT |
1659 | { |
1660 | int changed = _snd_pcm_hw_param_first(params, var); | |
1661 | if (changed < 0) | |
1662 | return changed; | |
1663 | if (params->rmask) { | |
1664 | int err = snd_pcm_hw_refine(pcm, params); | |
7eaa943c TI |
1665 | if (snd_BUG_ON(err < 0)) |
1666 | return err; | |
1da177e4 LT |
1667 | } |
1668 | return snd_pcm_hw_param_value(params, var, dir); | |
1669 | } | |
1670 | ||
e88e8ae6 TI |
1671 | EXPORT_SYMBOL(snd_pcm_hw_param_first); |
1672 | ||
877211f5 | 1673 | static int _snd_pcm_hw_param_last(struct snd_pcm_hw_params *params, |
123992f7 | 1674 | snd_pcm_hw_param_t var) |
1da177e4 LT |
1675 | { |
1676 | int changed; | |
1677 | if (hw_is_mask(var)) | |
1678 | changed = snd_mask_refine_last(hw_param_mask(params, var)); | |
1679 | else if (hw_is_interval(var)) | |
1680 | changed = snd_interval_refine_last(hw_param_interval(params, var)); | |
2f4ca8e5 | 1681 | else |
1da177e4 | 1682 | return -EINVAL; |
1da177e4 LT |
1683 | if (changed) { |
1684 | params->cmask |= 1 << var; | |
1685 | params->rmask |= 1 << var; | |
1686 | } | |
1687 | return changed; | |
1688 | } | |
1689 | ||
1690 | ||
1691 | /** | |
1c85cc64 | 1692 | * snd_pcm_hw_param_last - refine config space and return maximum value |
df8db936 TI |
1693 | * @pcm: PCM instance |
1694 | * @params: the hw_params instance | |
1695 | * @var: parameter to retrieve | |
1c85cc64 | 1696 | * @dir: pointer to the direction (-1,0,1) or %NULL |
1da177e4 | 1697 | * |
1c85cc64 | 1698 | * Inside configuration space defined by @params remove from @var all |
1da177e4 | 1699 | * values < maximum. Reduce configuration space accordingly. |
eb7c06e8 YB |
1700 | * |
1701 | * Return: The maximum, or a negative error code on failure. | |
1da177e4 | 1702 | */ |
e88e8ae6 TI |
1703 | int snd_pcm_hw_param_last(struct snd_pcm_substream *pcm, |
1704 | struct snd_pcm_hw_params *params, | |
1705 | snd_pcm_hw_param_t var, int *dir) | |
1da177e4 LT |
1706 | { |
1707 | int changed = _snd_pcm_hw_param_last(params, var); | |
1708 | if (changed < 0) | |
1709 | return changed; | |
1710 | if (params->rmask) { | |
1711 | int err = snd_pcm_hw_refine(pcm, params); | |
7eaa943c TI |
1712 | if (snd_BUG_ON(err < 0)) |
1713 | return err; | |
1da177e4 LT |
1714 | } |
1715 | return snd_pcm_hw_param_value(params, var, dir); | |
1716 | } | |
1717 | ||
e88e8ae6 | 1718 | EXPORT_SYMBOL(snd_pcm_hw_param_last); |
1da177e4 LT |
1719 | |
1720 | /** | |
1c85cc64 | 1721 | * snd_pcm_hw_param_choose - choose a configuration defined by @params |
df8db936 TI |
1722 | * @pcm: PCM instance |
1723 | * @params: the hw_params instance | |
1da177e4 | 1724 | * |
1c85cc64 | 1725 | * Choose one configuration from configuration space defined by @params. |
1da177e4 LT |
1726 | * The configuration chosen is that obtained fixing in this order: |
1727 | * first access, first format, first subformat, min channels, | |
1728 | * min rate, min period time, max buffer size, min tick time | |
eb7c06e8 YB |
1729 | * |
1730 | * Return: Zero if successful, or a negative error code on failure. | |
1da177e4 | 1731 | */ |
2f4ca8e5 TI |
1732 | int snd_pcm_hw_params_choose(struct snd_pcm_substream *pcm, |
1733 | struct snd_pcm_hw_params *params) | |
1da177e4 | 1734 | { |
2f4ca8e5 TI |
1735 | static int vars[] = { |
1736 | SNDRV_PCM_HW_PARAM_ACCESS, | |
1737 | SNDRV_PCM_HW_PARAM_FORMAT, | |
1738 | SNDRV_PCM_HW_PARAM_SUBFORMAT, | |
1739 | SNDRV_PCM_HW_PARAM_CHANNELS, | |
1740 | SNDRV_PCM_HW_PARAM_RATE, | |
1741 | SNDRV_PCM_HW_PARAM_PERIOD_TIME, | |
1742 | SNDRV_PCM_HW_PARAM_BUFFER_SIZE, | |
1743 | SNDRV_PCM_HW_PARAM_TICK_TIME, | |
1744 | -1 | |
1745 | }; | |
1746 | int err, *v; | |
1da177e4 | 1747 | |
2f4ca8e5 TI |
1748 | for (v = vars; *v != -1; v++) { |
1749 | if (*v != SNDRV_PCM_HW_PARAM_BUFFER_SIZE) | |
1750 | err = snd_pcm_hw_param_first(pcm, params, *v, NULL); | |
1751 | else | |
1752 | err = snd_pcm_hw_param_last(pcm, params, *v, NULL); | |
7eaa943c TI |
1753 | if (snd_BUG_ON(err < 0)) |
1754 | return err; | |
2f4ca8e5 | 1755 | } |
1da177e4 LT |
1756 | return 0; |
1757 | } | |
1758 | ||
877211f5 | 1759 | static int snd_pcm_lib_ioctl_reset(struct snd_pcm_substream *substream, |
1da177e4 LT |
1760 | void *arg) |
1761 | { | |
877211f5 | 1762 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1763 | unsigned long flags; |
1764 | snd_pcm_stream_lock_irqsave(substream, flags); | |
1765 | if (snd_pcm_running(substream) && | |
1766 | snd_pcm_update_hw_ptr(substream) >= 0) | |
1767 | runtime->status->hw_ptr %= runtime->buffer_size; | |
0e8014d7 | 1768 | else { |
1da177e4 | 1769 | runtime->status->hw_ptr = 0; |
0e8014d7 PLB |
1770 | runtime->hw_ptr_wrap = 0; |
1771 | } | |
1da177e4 LT |
1772 | snd_pcm_stream_unlock_irqrestore(substream, flags); |
1773 | return 0; | |
1774 | } | |
1775 | ||
877211f5 | 1776 | static int snd_pcm_lib_ioctl_channel_info(struct snd_pcm_substream *substream, |
1da177e4 LT |
1777 | void *arg) |
1778 | { | |
877211f5 TI |
1779 | struct snd_pcm_channel_info *info = arg; |
1780 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1da177e4 LT |
1781 | int width; |
1782 | if (!(runtime->info & SNDRV_PCM_INFO_MMAP)) { | |
1783 | info->offset = -1; | |
1784 | return 0; | |
1785 | } | |
1786 | width = snd_pcm_format_physical_width(runtime->format); | |
1787 | if (width < 0) | |
1788 | return width; | |
1789 | info->offset = 0; | |
1790 | switch (runtime->access) { | |
1791 | case SNDRV_PCM_ACCESS_MMAP_INTERLEAVED: | |
1792 | case SNDRV_PCM_ACCESS_RW_INTERLEAVED: | |
1793 | info->first = info->channel * width; | |
1794 | info->step = runtime->channels * width; | |
1795 | break; | |
1796 | case SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED: | |
1797 | case SNDRV_PCM_ACCESS_RW_NONINTERLEAVED: | |
1798 | { | |
1799 | size_t size = runtime->dma_bytes / runtime->channels; | |
1800 | info->first = info->channel * size * 8; | |
1801 | info->step = width; | |
1802 | break; | |
1803 | } | |
1804 | default: | |
1805 | snd_BUG(); | |
1806 | break; | |
1807 | } | |
1808 | return 0; | |
1809 | } | |
1810 | ||
8bea869c JK |
1811 | static int snd_pcm_lib_ioctl_fifo_size(struct snd_pcm_substream *substream, |
1812 | void *arg) | |
1813 | { | |
1814 | struct snd_pcm_hw_params *params = arg; | |
1815 | snd_pcm_format_t format; | |
a9960e6a CL |
1816 | int channels; |
1817 | ssize_t frame_size; | |
8bea869c JK |
1818 | |
1819 | params->fifo_size = substream->runtime->hw.fifo_size; | |
1820 | if (!(substream->runtime->hw.info & SNDRV_PCM_INFO_FIFO_IN_FRAMES)) { | |
1821 | format = params_format(params); | |
1822 | channels = params_channels(params); | |
a9960e6a CL |
1823 | frame_size = snd_pcm_format_size(format, channels); |
1824 | if (frame_size > 0) | |
1825 | params->fifo_size /= (unsigned)frame_size; | |
8bea869c JK |
1826 | } |
1827 | return 0; | |
1828 | } | |
1829 | ||
1da177e4 LT |
1830 | /** |
1831 | * snd_pcm_lib_ioctl - a generic PCM ioctl callback | |
1832 | * @substream: the pcm substream instance | |
1833 | * @cmd: ioctl command | |
1834 | * @arg: ioctl argument | |
1835 | * | |
1836 | * Processes the generic ioctl commands for PCM. | |
1837 | * Can be passed as the ioctl callback for PCM ops. | |
1838 | * | |
eb7c06e8 | 1839 | * Return: Zero if successful, or a negative error code on failure. |
1da177e4 | 1840 | */ |
877211f5 | 1841 | int snd_pcm_lib_ioctl(struct snd_pcm_substream *substream, |
1da177e4 LT |
1842 | unsigned int cmd, void *arg) |
1843 | { | |
1844 | switch (cmd) { | |
1845 | case SNDRV_PCM_IOCTL1_INFO: | |
1846 | return 0; | |
1847 | case SNDRV_PCM_IOCTL1_RESET: | |
1848 | return snd_pcm_lib_ioctl_reset(substream, arg); | |
1849 | case SNDRV_PCM_IOCTL1_CHANNEL_INFO: | |
1850 | return snd_pcm_lib_ioctl_channel_info(substream, arg); | |
8bea869c JK |
1851 | case SNDRV_PCM_IOCTL1_FIFO_SIZE: |
1852 | return snd_pcm_lib_ioctl_fifo_size(substream, arg); | |
1da177e4 LT |
1853 | } |
1854 | return -ENXIO; | |
1855 | } | |
1856 | ||
e88e8ae6 TI |
1857 | EXPORT_SYMBOL(snd_pcm_lib_ioctl); |
1858 | ||
1da177e4 LT |
1859 | /** |
1860 | * snd_pcm_period_elapsed - update the pcm status for the next period | |
1861 | * @substream: the pcm substream instance | |
1862 | * | |
1863 | * This function is called from the interrupt handler when the | |
1864 | * PCM has processed the period size. It will update the current | |
31e8960b | 1865 | * pointer, wake up sleepers, etc. |
1da177e4 LT |
1866 | * |
1867 | * Even if more than one periods have elapsed since the last call, you | |
1868 | * have to call this only once. | |
1869 | */ | |
877211f5 | 1870 | void snd_pcm_period_elapsed(struct snd_pcm_substream *substream) |
1da177e4 | 1871 | { |
877211f5 | 1872 | struct snd_pcm_runtime *runtime; |
1da177e4 LT |
1873 | unsigned long flags; |
1874 | ||
7eaa943c TI |
1875 | if (PCM_RUNTIME_CHECK(substream)) |
1876 | return; | |
1da177e4 | 1877 | runtime = substream->runtime; |
1da177e4 | 1878 | |
1da177e4 LT |
1879 | snd_pcm_stream_lock_irqsave(substream, flags); |
1880 | if (!snd_pcm_running(substream) || | |
f240406b | 1881 | snd_pcm_update_hw_ptr0(substream, 1) < 0) |
1da177e4 LT |
1882 | goto _end; |
1883 | ||
90bbaf66 | 1884 | #ifdef CONFIG_SND_PCM_TIMER |
1da177e4 LT |
1885 | if (substream->timer_running) |
1886 | snd_timer_interrupt(substream->timer, 1); | |
90bbaf66 | 1887 | #endif |
1da177e4 | 1888 | _end: |
1da177e4 | 1889 | kill_fasync(&runtime->fasync, SIGIO, POLL_IN); |
3aa02cb6 | 1890 | snd_pcm_stream_unlock_irqrestore(substream, flags); |
1da177e4 LT |
1891 | } |
1892 | ||
e88e8ae6 TI |
1893 | EXPORT_SYMBOL(snd_pcm_period_elapsed); |
1894 | ||
13075510 TI |
1895 | /* |
1896 | * Wait until avail_min data becomes available | |
1897 | * Returns a negative error code if any error occurs during operation. | |
1898 | * The available space is stored on availp. When err = 0 and avail = 0 | |
1899 | * on the capture stream, it indicates the stream is in DRAINING state. | |
1900 | */ | |
5daeba34 | 1901 | static int wait_for_avail(struct snd_pcm_substream *substream, |
13075510 TI |
1902 | snd_pcm_uframes_t *availp) |
1903 | { | |
1904 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1905 | int is_playback = substream->stream == SNDRV_PCM_STREAM_PLAYBACK; | |
1906 | wait_queue_t wait; | |
1907 | int err = 0; | |
1908 | snd_pcm_uframes_t avail = 0; | |
f2b3614c TI |
1909 | long wait_time, tout; |
1910 | ||
763437a9 AV |
1911 | init_waitqueue_entry(&wait, current); |
1912 | set_current_state(TASK_INTERRUPTIBLE); | |
1913 | add_wait_queue(&runtime->tsleep, &wait); | |
1914 | ||
f2b3614c TI |
1915 | if (runtime->no_period_wakeup) |
1916 | wait_time = MAX_SCHEDULE_TIMEOUT; | |
1917 | else { | |
1918 | wait_time = 10; | |
1919 | if (runtime->rate) { | |
1920 | long t = runtime->period_size * 2 / runtime->rate; | |
1921 | wait_time = max(t, wait_time); | |
1922 | } | |
1923 | wait_time = msecs_to_jiffies(wait_time * 1000); | |
1924 | } | |
763437a9 | 1925 | |
13075510 TI |
1926 | for (;;) { |
1927 | if (signal_pending(current)) { | |
1928 | err = -ERESTARTSYS; | |
1929 | break; | |
1930 | } | |
763437a9 AV |
1931 | |
1932 | /* | |
1933 | * We need to check if space became available already | |
1934 | * (and thus the wakeup happened already) first to close | |
1935 | * the race of space already having become available. | |
1936 | * This check must happen after been added to the waitqueue | |
1937 | * and having current state be INTERRUPTIBLE. | |
1938 | */ | |
1939 | if (is_playback) | |
1940 | avail = snd_pcm_playback_avail(runtime); | |
1941 | else | |
1942 | avail = snd_pcm_capture_avail(runtime); | |
1943 | if (avail >= runtime->twake) | |
1944 | break; | |
13075510 | 1945 | snd_pcm_stream_unlock_irq(substream); |
763437a9 AV |
1946 | |
1947 | tout = schedule_timeout(wait_time); | |
1948 | ||
13075510 | 1949 | snd_pcm_stream_lock_irq(substream); |
763437a9 | 1950 | set_current_state(TASK_INTERRUPTIBLE); |
13075510 TI |
1951 | switch (runtime->status->state) { |
1952 | case SNDRV_PCM_STATE_SUSPENDED: | |
1953 | err = -ESTRPIPE; | |
1954 | goto _endloop; | |
1955 | case SNDRV_PCM_STATE_XRUN: | |
1956 | err = -EPIPE; | |
1957 | goto _endloop; | |
1958 | case SNDRV_PCM_STATE_DRAINING: | |
1959 | if (is_playback) | |
1960 | err = -EPIPE; | |
1961 | else | |
1962 | avail = 0; /* indicate draining */ | |
1963 | goto _endloop; | |
1964 | case SNDRV_PCM_STATE_OPEN: | |
1965 | case SNDRV_PCM_STATE_SETUP: | |
1966 | case SNDRV_PCM_STATE_DISCONNECTED: | |
1967 | err = -EBADFD; | |
1968 | goto _endloop; | |
ed697e1a JK |
1969 | case SNDRV_PCM_STATE_PAUSED: |
1970 | continue; | |
13075510 TI |
1971 | } |
1972 | if (!tout) { | |
09e56df8 TI |
1973 | pcm_dbg(substream->pcm, |
1974 | "%s write error (DMA or IRQ trouble?)\n", | |
1975 | is_playback ? "playback" : "capture"); | |
13075510 TI |
1976 | err = -EIO; |
1977 | break; | |
1978 | } | |
13075510 TI |
1979 | } |
1980 | _endloop: | |
763437a9 | 1981 | set_current_state(TASK_RUNNING); |
c91a988d | 1982 | remove_wait_queue(&runtime->tsleep, &wait); |
13075510 TI |
1983 | *availp = avail; |
1984 | return err; | |
1985 | } | |
1986 | ||
877211f5 | 1987 | static int snd_pcm_lib_write_transfer(struct snd_pcm_substream *substream, |
1da177e4 LT |
1988 | unsigned int hwoff, |
1989 | unsigned long data, unsigned int off, | |
1990 | snd_pcm_uframes_t frames) | |
1991 | { | |
877211f5 | 1992 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1993 | int err; |
1994 | char __user *buf = (char __user *) data + frames_to_bytes(runtime, off); | |
1995 | if (substream->ops->copy) { | |
1996 | if ((err = substream->ops->copy(substream, -1, hwoff, buf, frames)) < 0) | |
1997 | return err; | |
1998 | } else { | |
1999 | char *hwbuf = runtime->dma_area + frames_to_bytes(runtime, hwoff); | |
1da177e4 LT |
2000 | if (copy_from_user(hwbuf, buf, frames_to_bytes(runtime, frames))) |
2001 | return -EFAULT; | |
2002 | } | |
2003 | return 0; | |
2004 | } | |
2005 | ||
877211f5 | 2006 | typedef int (*transfer_f)(struct snd_pcm_substream *substream, unsigned int hwoff, |
1da177e4 LT |
2007 | unsigned long data, unsigned int off, |
2008 | snd_pcm_uframes_t size); | |
2009 | ||
877211f5 | 2010 | static snd_pcm_sframes_t snd_pcm_lib_write1(struct snd_pcm_substream *substream, |
1da177e4 LT |
2011 | unsigned long data, |
2012 | snd_pcm_uframes_t size, | |
2013 | int nonblock, | |
2014 | transfer_f transfer) | |
2015 | { | |
877211f5 | 2016 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
2017 | snd_pcm_uframes_t xfer = 0; |
2018 | snd_pcm_uframes_t offset = 0; | |
0910c216 | 2019 | snd_pcm_uframes_t avail; |
1da177e4 LT |
2020 | int err = 0; |
2021 | ||
2022 | if (size == 0) | |
2023 | return 0; | |
1da177e4 LT |
2024 | |
2025 | snd_pcm_stream_lock_irq(substream); | |
2026 | switch (runtime->status->state) { | |
2027 | case SNDRV_PCM_STATE_PREPARED: | |
2028 | case SNDRV_PCM_STATE_RUNNING: | |
2029 | case SNDRV_PCM_STATE_PAUSED: | |
2030 | break; | |
2031 | case SNDRV_PCM_STATE_XRUN: | |
2032 | err = -EPIPE; | |
2033 | goto _end_unlock; | |
2034 | case SNDRV_PCM_STATE_SUSPENDED: | |
2035 | err = -ESTRPIPE; | |
2036 | goto _end_unlock; | |
2037 | default: | |
2038 | err = -EBADFD; | |
2039 | goto _end_unlock; | |
2040 | } | |
2041 | ||
5daeba34 | 2042 | runtime->twake = runtime->control->avail_min ? : 1; |
0910c216 TI |
2043 | if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) |
2044 | snd_pcm_update_hw_ptr(substream); | |
2045 | avail = snd_pcm_playback_avail(runtime); | |
1da177e4 LT |
2046 | while (size > 0) { |
2047 | snd_pcm_uframes_t frames, appl_ptr, appl_ofs; | |
1da177e4 | 2048 | snd_pcm_uframes_t cont; |
13075510 | 2049 | if (!avail) { |
1da177e4 LT |
2050 | if (nonblock) { |
2051 | err = -EAGAIN; | |
2052 | goto _end_unlock; | |
2053 | } | |
5daeba34 DD |
2054 | runtime->twake = min_t(snd_pcm_uframes_t, size, |
2055 | runtime->control->avail_min ? : 1); | |
2056 | err = wait_for_avail(substream, &avail); | |
13075510 | 2057 | if (err < 0) |
443feb88 | 2058 | goto _end_unlock; |
1da177e4 | 2059 | } |
1da177e4 LT |
2060 | frames = size > avail ? avail : size; |
2061 | cont = runtime->buffer_size - runtime->control->appl_ptr % runtime->buffer_size; | |
2062 | if (frames > cont) | |
2063 | frames = cont; | |
7eaa943c | 2064 | if (snd_BUG_ON(!frames)) { |
c91a988d | 2065 | runtime->twake = 0; |
7eaa943c TI |
2066 | snd_pcm_stream_unlock_irq(substream); |
2067 | return -EINVAL; | |
2068 | } | |
1da177e4 LT |
2069 | appl_ptr = runtime->control->appl_ptr; |
2070 | appl_ofs = appl_ptr % runtime->buffer_size; | |
2071 | snd_pcm_stream_unlock_irq(substream); | |
1250932e | 2072 | err = transfer(substream, appl_ofs, data, offset, frames); |
1da177e4 | 2073 | snd_pcm_stream_lock_irq(substream); |
1250932e JK |
2074 | if (err < 0) |
2075 | goto _end_unlock; | |
1da177e4 LT |
2076 | switch (runtime->status->state) { |
2077 | case SNDRV_PCM_STATE_XRUN: | |
2078 | err = -EPIPE; | |
2079 | goto _end_unlock; | |
2080 | case SNDRV_PCM_STATE_SUSPENDED: | |
2081 | err = -ESTRPIPE; | |
2082 | goto _end_unlock; | |
2083 | default: | |
2084 | break; | |
2085 | } | |
2086 | appl_ptr += frames; | |
2087 | if (appl_ptr >= runtime->boundary) | |
2088 | appl_ptr -= runtime->boundary; | |
2089 | runtime->control->appl_ptr = appl_ptr; | |
2090 | if (substream->ops->ack) | |
2091 | substream->ops->ack(substream); | |
2092 | ||
2093 | offset += frames; | |
2094 | size -= frames; | |
2095 | xfer += frames; | |
0910c216 | 2096 | avail -= frames; |
1da177e4 LT |
2097 | if (runtime->status->state == SNDRV_PCM_STATE_PREPARED && |
2098 | snd_pcm_playback_hw_avail(runtime) >= (snd_pcm_sframes_t)runtime->start_threshold) { | |
2099 | err = snd_pcm_start(substream); | |
2100 | if (err < 0) | |
2101 | goto _end_unlock; | |
2102 | } | |
1da177e4 LT |
2103 | } |
2104 | _end_unlock: | |
c91a988d | 2105 | runtime->twake = 0; |
1250932e JK |
2106 | if (xfer > 0 && err >= 0) |
2107 | snd_pcm_update_state(substream, runtime); | |
1da177e4 | 2108 | snd_pcm_stream_unlock_irq(substream); |
1da177e4 LT |
2109 | return xfer > 0 ? (snd_pcm_sframes_t)xfer : err; |
2110 | } | |
2111 | ||
7eaa943c TI |
2112 | /* sanity-check for read/write methods */ |
2113 | static int pcm_sanity_check(struct snd_pcm_substream *substream) | |
1da177e4 | 2114 | { |
877211f5 | 2115 | struct snd_pcm_runtime *runtime; |
7eaa943c TI |
2116 | if (PCM_RUNTIME_CHECK(substream)) |
2117 | return -ENXIO; | |
1da177e4 | 2118 | runtime = substream->runtime; |
7eaa943c TI |
2119 | if (snd_BUG_ON(!substream->ops->copy && !runtime->dma_area)) |
2120 | return -EINVAL; | |
1da177e4 LT |
2121 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) |
2122 | return -EBADFD; | |
7eaa943c TI |
2123 | return 0; |
2124 | } | |
2125 | ||
2126 | snd_pcm_sframes_t snd_pcm_lib_write(struct snd_pcm_substream *substream, const void __user *buf, snd_pcm_uframes_t size) | |
2127 | { | |
2128 | struct snd_pcm_runtime *runtime; | |
2129 | int nonblock; | |
2130 | int err; | |
1da177e4 | 2131 | |
7eaa943c TI |
2132 | err = pcm_sanity_check(substream); |
2133 | if (err < 0) | |
2134 | return err; | |
2135 | runtime = substream->runtime; | |
0df63e44 | 2136 | nonblock = !!(substream->f_flags & O_NONBLOCK); |
1da177e4 LT |
2137 | |
2138 | if (runtime->access != SNDRV_PCM_ACCESS_RW_INTERLEAVED && | |
2139 | runtime->channels > 1) | |
2140 | return -EINVAL; | |
2141 | return snd_pcm_lib_write1(substream, (unsigned long)buf, size, nonblock, | |
2142 | snd_pcm_lib_write_transfer); | |
2143 | } | |
2144 | ||
e88e8ae6 TI |
2145 | EXPORT_SYMBOL(snd_pcm_lib_write); |
2146 | ||
877211f5 | 2147 | static int snd_pcm_lib_writev_transfer(struct snd_pcm_substream *substream, |
1da177e4 LT |
2148 | unsigned int hwoff, |
2149 | unsigned long data, unsigned int off, | |
2150 | snd_pcm_uframes_t frames) | |
2151 | { | |
877211f5 | 2152 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
2153 | int err; |
2154 | void __user **bufs = (void __user **)data; | |
2155 | int channels = runtime->channels; | |
2156 | int c; | |
2157 | if (substream->ops->copy) { | |
7eaa943c TI |
2158 | if (snd_BUG_ON(!substream->ops->silence)) |
2159 | return -EINVAL; | |
1da177e4 LT |
2160 | for (c = 0; c < channels; ++c, ++bufs) { |
2161 | if (*bufs == NULL) { | |
2162 | if ((err = substream->ops->silence(substream, c, hwoff, frames)) < 0) | |
2163 | return err; | |
2164 | } else { | |
2165 | char __user *buf = *bufs + samples_to_bytes(runtime, off); | |
2166 | if ((err = substream->ops->copy(substream, c, hwoff, buf, frames)) < 0) | |
2167 | return err; | |
2168 | } | |
2169 | } | |
2170 | } else { | |
2171 | /* default transfer behaviour */ | |
2172 | size_t dma_csize = runtime->dma_bytes / channels; | |
1da177e4 LT |
2173 | for (c = 0; c < channels; ++c, ++bufs) { |
2174 | char *hwbuf = runtime->dma_area + (c * dma_csize) + samples_to_bytes(runtime, hwoff); | |
2175 | if (*bufs == NULL) { | |
2176 | snd_pcm_format_set_silence(runtime->format, hwbuf, frames); | |
2177 | } else { | |
2178 | char __user *buf = *bufs + samples_to_bytes(runtime, off); | |
2179 | if (copy_from_user(hwbuf, buf, samples_to_bytes(runtime, frames))) | |
2180 | return -EFAULT; | |
2181 | } | |
2182 | } | |
2183 | } | |
2184 | return 0; | |
2185 | } | |
2186 | ||
877211f5 | 2187 | snd_pcm_sframes_t snd_pcm_lib_writev(struct snd_pcm_substream *substream, |
1da177e4 LT |
2188 | void __user **bufs, |
2189 | snd_pcm_uframes_t frames) | |
2190 | { | |
877211f5 | 2191 | struct snd_pcm_runtime *runtime; |
1da177e4 | 2192 | int nonblock; |
7eaa943c | 2193 | int err; |
1da177e4 | 2194 | |
7eaa943c TI |
2195 | err = pcm_sanity_check(substream); |
2196 | if (err < 0) | |
2197 | return err; | |
1da177e4 | 2198 | runtime = substream->runtime; |
0df63e44 | 2199 | nonblock = !!(substream->f_flags & O_NONBLOCK); |
1da177e4 LT |
2200 | |
2201 | if (runtime->access != SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) | |
2202 | return -EINVAL; | |
2203 | return snd_pcm_lib_write1(substream, (unsigned long)bufs, frames, | |
2204 | nonblock, snd_pcm_lib_writev_transfer); | |
2205 | } | |
2206 | ||
e88e8ae6 TI |
2207 | EXPORT_SYMBOL(snd_pcm_lib_writev); |
2208 | ||
877211f5 | 2209 | static int snd_pcm_lib_read_transfer(struct snd_pcm_substream *substream, |
1da177e4 LT |
2210 | unsigned int hwoff, |
2211 | unsigned long data, unsigned int off, | |
2212 | snd_pcm_uframes_t frames) | |
2213 | { | |
877211f5 | 2214 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
2215 | int err; |
2216 | char __user *buf = (char __user *) data + frames_to_bytes(runtime, off); | |
2217 | if (substream->ops->copy) { | |
2218 | if ((err = substream->ops->copy(substream, -1, hwoff, buf, frames)) < 0) | |
2219 | return err; | |
2220 | } else { | |
2221 | char *hwbuf = runtime->dma_area + frames_to_bytes(runtime, hwoff); | |
1da177e4 LT |
2222 | if (copy_to_user(buf, hwbuf, frames_to_bytes(runtime, frames))) |
2223 | return -EFAULT; | |
2224 | } | |
2225 | return 0; | |
2226 | } | |
2227 | ||
877211f5 | 2228 | static snd_pcm_sframes_t snd_pcm_lib_read1(struct snd_pcm_substream *substream, |
1da177e4 LT |
2229 | unsigned long data, |
2230 | snd_pcm_uframes_t size, | |
2231 | int nonblock, | |
2232 | transfer_f transfer) | |
2233 | { | |
877211f5 | 2234 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
2235 | snd_pcm_uframes_t xfer = 0; |
2236 | snd_pcm_uframes_t offset = 0; | |
0910c216 | 2237 | snd_pcm_uframes_t avail; |
1da177e4 LT |
2238 | int err = 0; |
2239 | ||
2240 | if (size == 0) | |
2241 | return 0; | |
1da177e4 LT |
2242 | |
2243 | snd_pcm_stream_lock_irq(substream); | |
2244 | switch (runtime->status->state) { | |
2245 | case SNDRV_PCM_STATE_PREPARED: | |
2246 | if (size >= runtime->start_threshold) { | |
2247 | err = snd_pcm_start(substream); | |
2248 | if (err < 0) | |
2249 | goto _end_unlock; | |
2250 | } | |
2251 | break; | |
2252 | case SNDRV_PCM_STATE_DRAINING: | |
2253 | case SNDRV_PCM_STATE_RUNNING: | |
2254 | case SNDRV_PCM_STATE_PAUSED: | |
2255 | break; | |
2256 | case SNDRV_PCM_STATE_XRUN: | |
2257 | err = -EPIPE; | |
2258 | goto _end_unlock; | |
2259 | case SNDRV_PCM_STATE_SUSPENDED: | |
2260 | err = -ESTRPIPE; | |
2261 | goto _end_unlock; | |
2262 | default: | |
2263 | err = -EBADFD; | |
2264 | goto _end_unlock; | |
2265 | } | |
2266 | ||
5daeba34 | 2267 | runtime->twake = runtime->control->avail_min ? : 1; |
0910c216 TI |
2268 | if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) |
2269 | snd_pcm_update_hw_ptr(substream); | |
2270 | avail = snd_pcm_capture_avail(runtime); | |
1da177e4 LT |
2271 | while (size > 0) { |
2272 | snd_pcm_uframes_t frames, appl_ptr, appl_ofs; | |
1da177e4 | 2273 | snd_pcm_uframes_t cont; |
13075510 TI |
2274 | if (!avail) { |
2275 | if (runtime->status->state == | |
2276 | SNDRV_PCM_STATE_DRAINING) { | |
2277 | snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP); | |
1da177e4 LT |
2278 | goto _end_unlock; |
2279 | } | |
1da177e4 LT |
2280 | if (nonblock) { |
2281 | err = -EAGAIN; | |
2282 | goto _end_unlock; | |
2283 | } | |
5daeba34 DD |
2284 | runtime->twake = min_t(snd_pcm_uframes_t, size, |
2285 | runtime->control->avail_min ? : 1); | |
2286 | err = wait_for_avail(substream, &avail); | |
13075510 | 2287 | if (err < 0) |
443feb88 | 2288 | goto _end_unlock; |
13075510 TI |
2289 | if (!avail) |
2290 | continue; /* draining */ | |
1da177e4 | 2291 | } |
1da177e4 LT |
2292 | frames = size > avail ? avail : size; |
2293 | cont = runtime->buffer_size - runtime->control->appl_ptr % runtime->buffer_size; | |
2294 | if (frames > cont) | |
2295 | frames = cont; | |
7eaa943c | 2296 | if (snd_BUG_ON(!frames)) { |
c91a988d | 2297 | runtime->twake = 0; |
7eaa943c TI |
2298 | snd_pcm_stream_unlock_irq(substream); |
2299 | return -EINVAL; | |
2300 | } | |
1da177e4 LT |
2301 | appl_ptr = runtime->control->appl_ptr; |
2302 | appl_ofs = appl_ptr % runtime->buffer_size; | |
2303 | snd_pcm_stream_unlock_irq(substream); | |
1250932e | 2304 | err = transfer(substream, appl_ofs, data, offset, frames); |
1da177e4 | 2305 | snd_pcm_stream_lock_irq(substream); |
1250932e JK |
2306 | if (err < 0) |
2307 | goto _end_unlock; | |
1da177e4 LT |
2308 | switch (runtime->status->state) { |
2309 | case SNDRV_PCM_STATE_XRUN: | |
2310 | err = -EPIPE; | |
2311 | goto _end_unlock; | |
2312 | case SNDRV_PCM_STATE_SUSPENDED: | |
2313 | err = -ESTRPIPE; | |
2314 | goto _end_unlock; | |
2315 | default: | |
2316 | break; | |
2317 | } | |
2318 | appl_ptr += frames; | |
2319 | if (appl_ptr >= runtime->boundary) | |
2320 | appl_ptr -= runtime->boundary; | |
2321 | runtime->control->appl_ptr = appl_ptr; | |
2322 | if (substream->ops->ack) | |
2323 | substream->ops->ack(substream); | |
2324 | ||
2325 | offset += frames; | |
2326 | size -= frames; | |
2327 | xfer += frames; | |
0910c216 | 2328 | avail -= frames; |
1da177e4 LT |
2329 | } |
2330 | _end_unlock: | |
c91a988d | 2331 | runtime->twake = 0; |
1250932e JK |
2332 | if (xfer > 0 && err >= 0) |
2333 | snd_pcm_update_state(substream, runtime); | |
1da177e4 | 2334 | snd_pcm_stream_unlock_irq(substream); |
1da177e4 LT |
2335 | return xfer > 0 ? (snd_pcm_sframes_t)xfer : err; |
2336 | } | |
2337 | ||
877211f5 | 2338 | snd_pcm_sframes_t snd_pcm_lib_read(struct snd_pcm_substream *substream, void __user *buf, snd_pcm_uframes_t size) |
1da177e4 | 2339 | { |
877211f5 | 2340 | struct snd_pcm_runtime *runtime; |
1da177e4 | 2341 | int nonblock; |
7eaa943c | 2342 | int err; |
1da177e4 | 2343 | |
7eaa943c TI |
2344 | err = pcm_sanity_check(substream); |
2345 | if (err < 0) | |
2346 | return err; | |
1da177e4 | 2347 | runtime = substream->runtime; |
0df63e44 | 2348 | nonblock = !!(substream->f_flags & O_NONBLOCK); |
1da177e4 LT |
2349 | if (runtime->access != SNDRV_PCM_ACCESS_RW_INTERLEAVED) |
2350 | return -EINVAL; | |
2351 | return snd_pcm_lib_read1(substream, (unsigned long)buf, size, nonblock, snd_pcm_lib_read_transfer); | |
2352 | } | |
2353 | ||
e88e8ae6 TI |
2354 | EXPORT_SYMBOL(snd_pcm_lib_read); |
2355 | ||
877211f5 | 2356 | static int snd_pcm_lib_readv_transfer(struct snd_pcm_substream *substream, |
1da177e4 LT |
2357 | unsigned int hwoff, |
2358 | unsigned long data, unsigned int off, | |
2359 | snd_pcm_uframes_t frames) | |
2360 | { | |
877211f5 | 2361 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
2362 | int err; |
2363 | void __user **bufs = (void __user **)data; | |
2364 | int channels = runtime->channels; | |
2365 | int c; | |
2366 | if (substream->ops->copy) { | |
2367 | for (c = 0; c < channels; ++c, ++bufs) { | |
2368 | char __user *buf; | |
2369 | if (*bufs == NULL) | |
2370 | continue; | |
2371 | buf = *bufs + samples_to_bytes(runtime, off); | |
2372 | if ((err = substream->ops->copy(substream, c, hwoff, buf, frames)) < 0) | |
2373 | return err; | |
2374 | } | |
2375 | } else { | |
2376 | snd_pcm_uframes_t dma_csize = runtime->dma_bytes / channels; | |
1da177e4 LT |
2377 | for (c = 0; c < channels; ++c, ++bufs) { |
2378 | char *hwbuf; | |
2379 | char __user *buf; | |
2380 | if (*bufs == NULL) | |
2381 | continue; | |
2382 | ||
2383 | hwbuf = runtime->dma_area + (c * dma_csize) + samples_to_bytes(runtime, hwoff); | |
2384 | buf = *bufs + samples_to_bytes(runtime, off); | |
2385 | if (copy_to_user(buf, hwbuf, samples_to_bytes(runtime, frames))) | |
2386 | return -EFAULT; | |
2387 | } | |
2388 | } | |
2389 | return 0; | |
2390 | } | |
2391 | ||
877211f5 | 2392 | snd_pcm_sframes_t snd_pcm_lib_readv(struct snd_pcm_substream *substream, |
1da177e4 LT |
2393 | void __user **bufs, |
2394 | snd_pcm_uframes_t frames) | |
2395 | { | |
877211f5 | 2396 | struct snd_pcm_runtime *runtime; |
1da177e4 | 2397 | int nonblock; |
7eaa943c | 2398 | int err; |
1da177e4 | 2399 | |
7eaa943c TI |
2400 | err = pcm_sanity_check(substream); |
2401 | if (err < 0) | |
2402 | return err; | |
1da177e4 | 2403 | runtime = substream->runtime; |
1da177e4 LT |
2404 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) |
2405 | return -EBADFD; | |
2406 | ||
0df63e44 | 2407 | nonblock = !!(substream->f_flags & O_NONBLOCK); |
1da177e4 LT |
2408 | if (runtime->access != SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) |
2409 | return -EINVAL; | |
2410 | return snd_pcm_lib_read1(substream, (unsigned long)bufs, frames, nonblock, snd_pcm_lib_readv_transfer); | |
2411 | } | |
2412 | ||
1da177e4 | 2413 | EXPORT_SYMBOL(snd_pcm_lib_readv); |
2d3391ec TI |
2414 | |
2415 | /* | |
2416 | * standard channel mapping helpers | |
2417 | */ | |
2418 | ||
2419 | /* default channel maps for multi-channel playbacks, up to 8 channels */ | |
2420 | const struct snd_pcm_chmap_elem snd_pcm_std_chmaps[] = { | |
2421 | { .channels = 1, | |
5efbc261 | 2422 | .map = { SNDRV_CHMAP_MONO } }, |
2d3391ec TI |
2423 | { .channels = 2, |
2424 | .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR } }, | |
2425 | { .channels = 4, | |
2426 | .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, | |
2427 | SNDRV_CHMAP_RL, SNDRV_CHMAP_RR } }, | |
2428 | { .channels = 6, | |
2429 | .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, | |
2430 | SNDRV_CHMAP_RL, SNDRV_CHMAP_RR, | |
2431 | SNDRV_CHMAP_FC, SNDRV_CHMAP_LFE } }, | |
2432 | { .channels = 8, | |
2433 | .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, | |
2434 | SNDRV_CHMAP_RL, SNDRV_CHMAP_RR, | |
2435 | SNDRV_CHMAP_FC, SNDRV_CHMAP_LFE, | |
2436 | SNDRV_CHMAP_SL, SNDRV_CHMAP_SR } }, | |
2437 | { } | |
2438 | }; | |
2439 | EXPORT_SYMBOL_GPL(snd_pcm_std_chmaps); | |
2440 | ||
2441 | /* alternative channel maps with CLFE <-> surround swapped for 6/8 channels */ | |
2442 | const struct snd_pcm_chmap_elem snd_pcm_alt_chmaps[] = { | |
2443 | { .channels = 1, | |
5efbc261 | 2444 | .map = { SNDRV_CHMAP_MONO } }, |
2d3391ec TI |
2445 | { .channels = 2, |
2446 | .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR } }, | |
2447 | { .channels = 4, | |
2448 | .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, | |
2449 | SNDRV_CHMAP_RL, SNDRV_CHMAP_RR } }, | |
2450 | { .channels = 6, | |
2451 | .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, | |
2452 | SNDRV_CHMAP_FC, SNDRV_CHMAP_LFE, | |
2453 | SNDRV_CHMAP_RL, SNDRV_CHMAP_RR } }, | |
2454 | { .channels = 8, | |
2455 | .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, | |
2456 | SNDRV_CHMAP_FC, SNDRV_CHMAP_LFE, | |
2457 | SNDRV_CHMAP_RL, SNDRV_CHMAP_RR, | |
2458 | SNDRV_CHMAP_SL, SNDRV_CHMAP_SR } }, | |
2459 | { } | |
2460 | }; | |
2461 | EXPORT_SYMBOL_GPL(snd_pcm_alt_chmaps); | |
2462 | ||
2463 | static bool valid_chmap_channels(const struct snd_pcm_chmap *info, int ch) | |
2464 | { | |
2465 | if (ch > info->max_channels) | |
2466 | return false; | |
2467 | return !info->channel_mask || (info->channel_mask & (1U << ch)); | |
2468 | } | |
2469 | ||
2470 | static int pcm_chmap_ctl_info(struct snd_kcontrol *kcontrol, | |
2471 | struct snd_ctl_elem_info *uinfo) | |
2472 | { | |
2473 | struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol); | |
2474 | ||
2475 | uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; | |
2476 | uinfo->count = 0; | |
2477 | uinfo->count = info->max_channels; | |
2478 | uinfo->value.integer.min = 0; | |
2479 | uinfo->value.integer.max = SNDRV_CHMAP_LAST; | |
2480 | return 0; | |
2481 | } | |
2482 | ||
2483 | /* get callback for channel map ctl element | |
2484 | * stores the channel position firstly matching with the current channels | |
2485 | */ | |
2486 | static int pcm_chmap_ctl_get(struct snd_kcontrol *kcontrol, | |
2487 | struct snd_ctl_elem_value *ucontrol) | |
2488 | { | |
2489 | struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol); | |
2490 | unsigned int idx = snd_ctl_get_ioffidx(kcontrol, &ucontrol->id); | |
2491 | struct snd_pcm_substream *substream; | |
2492 | const struct snd_pcm_chmap_elem *map; | |
2493 | ||
2494 | if (snd_BUG_ON(!info->chmap)) | |
2495 | return -EINVAL; | |
2496 | substream = snd_pcm_chmap_substream(info, idx); | |
2497 | if (!substream) | |
2498 | return -ENODEV; | |
2499 | memset(ucontrol->value.integer.value, 0, | |
2500 | sizeof(ucontrol->value.integer.value)); | |
2501 | if (!substream->runtime) | |
2502 | return 0; /* no channels set */ | |
2503 | for (map = info->chmap; map->channels; map++) { | |
2504 | int i; | |
2505 | if (map->channels == substream->runtime->channels && | |
2506 | valid_chmap_channels(info, map->channels)) { | |
2507 | for (i = 0; i < map->channels; i++) | |
2508 | ucontrol->value.integer.value[i] = map->map[i]; | |
2509 | return 0; | |
2510 | } | |
2511 | } | |
2512 | return -EINVAL; | |
2513 | } | |
2514 | ||
2515 | /* tlv callback for channel map ctl element | |
2516 | * expands the pre-defined channel maps in a form of TLV | |
2517 | */ | |
2518 | static int pcm_chmap_ctl_tlv(struct snd_kcontrol *kcontrol, int op_flag, | |
2519 | unsigned int size, unsigned int __user *tlv) | |
2520 | { | |
2521 | struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol); | |
2522 | const struct snd_pcm_chmap_elem *map; | |
2523 | unsigned int __user *dst; | |
2524 | int c, count = 0; | |
2525 | ||
2526 | if (snd_BUG_ON(!info->chmap)) | |
2527 | return -EINVAL; | |
2528 | if (size < 8) | |
2529 | return -ENOMEM; | |
2530 | if (put_user(SNDRV_CTL_TLVT_CONTAINER, tlv)) | |
2531 | return -EFAULT; | |
2532 | size -= 8; | |
2533 | dst = tlv + 2; | |
2534 | for (map = info->chmap; map->channels; map++) { | |
2535 | int chs_bytes = map->channels * 4; | |
2536 | if (!valid_chmap_channels(info, map->channels)) | |
2537 | continue; | |
2538 | if (size < 8) | |
2539 | return -ENOMEM; | |
2540 | if (put_user(SNDRV_CTL_TLVT_CHMAP_FIXED, dst) || | |
2541 | put_user(chs_bytes, dst + 1)) | |
2542 | return -EFAULT; | |
2543 | dst += 2; | |
2544 | size -= 8; | |
2545 | count += 8; | |
2546 | if (size < chs_bytes) | |
2547 | return -ENOMEM; | |
2548 | size -= chs_bytes; | |
2549 | count += chs_bytes; | |
2550 | for (c = 0; c < map->channels; c++) { | |
2551 | if (put_user(map->map[c], dst)) | |
2552 | return -EFAULT; | |
2553 | dst++; | |
2554 | } | |
2555 | } | |
2556 | if (put_user(count, tlv + 1)) | |
2557 | return -EFAULT; | |
2558 | return 0; | |
2559 | } | |
2560 | ||
2561 | static void pcm_chmap_ctl_private_free(struct snd_kcontrol *kcontrol) | |
2562 | { | |
2563 | struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol); | |
2564 | info->pcm->streams[info->stream].chmap_kctl = NULL; | |
2565 | kfree(info); | |
2566 | } | |
2567 | ||
2568 | /** | |
2569 | * snd_pcm_add_chmap_ctls - create channel-mapping control elements | |
2570 | * @pcm: the assigned PCM instance | |
2571 | * @stream: stream direction | |
2572 | * @chmap: channel map elements (for query) | |
2573 | * @max_channels: the max number of channels for the stream | |
2574 | * @private_value: the value passed to each kcontrol's private_value field | |
2575 | * @info_ret: store struct snd_pcm_chmap instance if non-NULL | |
2576 | * | |
2577 | * Create channel-mapping control elements assigned to the given PCM stream(s). | |
eb7c06e8 | 2578 | * Return: Zero if successful, or a negative error value. |
2d3391ec TI |
2579 | */ |
2580 | int snd_pcm_add_chmap_ctls(struct snd_pcm *pcm, int stream, | |
2581 | const struct snd_pcm_chmap_elem *chmap, | |
2582 | int max_channels, | |
2583 | unsigned long private_value, | |
2584 | struct snd_pcm_chmap **info_ret) | |
2585 | { | |
2586 | struct snd_pcm_chmap *info; | |
2587 | struct snd_kcontrol_new knew = { | |
2588 | .iface = SNDRV_CTL_ELEM_IFACE_PCM, | |
2589 | .access = SNDRV_CTL_ELEM_ACCESS_READ | | |
2d3391ec TI |
2590 | SNDRV_CTL_ELEM_ACCESS_TLV_READ | |
2591 | SNDRV_CTL_ELEM_ACCESS_TLV_CALLBACK, | |
2592 | .info = pcm_chmap_ctl_info, | |
2593 | .get = pcm_chmap_ctl_get, | |
2594 | .tlv.c = pcm_chmap_ctl_tlv, | |
2595 | }; | |
2596 | int err; | |
2597 | ||
8d879be8 TI |
2598 | if (WARN_ON(pcm->streams[stream].chmap_kctl)) |
2599 | return -EBUSY; | |
2d3391ec TI |
2600 | info = kzalloc(sizeof(*info), GFP_KERNEL); |
2601 | if (!info) | |
2602 | return -ENOMEM; | |
2603 | info->pcm = pcm; | |
2604 | info->stream = stream; | |
2605 | info->chmap = chmap; | |
2606 | info->max_channels = max_channels; | |
2607 | if (stream == SNDRV_PCM_STREAM_PLAYBACK) | |
2608 | knew.name = "Playback Channel Map"; | |
2609 | else | |
2610 | knew.name = "Capture Channel Map"; | |
2611 | knew.device = pcm->device; | |
2612 | knew.count = pcm->streams[stream].substream_count; | |
2613 | knew.private_value = private_value; | |
2614 | info->kctl = snd_ctl_new1(&knew, info); | |
2615 | if (!info->kctl) { | |
2616 | kfree(info); | |
2617 | return -ENOMEM; | |
2618 | } | |
2619 | info->kctl->private_free = pcm_chmap_ctl_private_free; | |
2620 | err = snd_ctl_add(pcm->card, info->kctl); | |
2621 | if (err < 0) | |
2622 | return err; | |
2623 | pcm->streams[stream].chmap_kctl = info->kctl; | |
2624 | if (info_ret) | |
2625 | *info_ret = info; | |
2626 | return 0; | |
2627 | } | |
2628 | EXPORT_SYMBOL_GPL(snd_pcm_add_chmap_ctls); |