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> |
1da177e4 LT |
26 | #include <sound/core.h> |
27 | #include <sound/control.h> | |
28 | #include <sound/info.h> | |
29 | #include <sound/pcm.h> | |
30 | #include <sound/pcm_params.h> | |
31 | #include <sound/timer.h> | |
32 | ||
33 | /* | |
34 | * fill ring buffer with silence | |
35 | * runtime->silence_start: starting pointer to silence area | |
36 | * runtime->silence_filled: size filled with silence | |
37 | * runtime->silence_threshold: threshold from application | |
38 | * runtime->silence_size: maximal size from application | |
39 | * | |
40 | * when runtime->silence_size >= runtime->boundary - fill processed area with silence immediately | |
41 | */ | |
877211f5 | 42 | void snd_pcm_playback_silence(struct snd_pcm_substream *substream, snd_pcm_uframes_t new_hw_ptr) |
1da177e4 | 43 | { |
877211f5 | 44 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
45 | snd_pcm_uframes_t frames, ofs, transfer; |
46 | ||
47 | if (runtime->silence_size < runtime->boundary) { | |
48 | snd_pcm_sframes_t noise_dist, n; | |
49 | if (runtime->silence_start != runtime->control->appl_ptr) { | |
50 | n = runtime->control->appl_ptr - runtime->silence_start; | |
51 | if (n < 0) | |
52 | n += runtime->boundary; | |
53 | if ((snd_pcm_uframes_t)n < runtime->silence_filled) | |
54 | runtime->silence_filled -= n; | |
55 | else | |
56 | runtime->silence_filled = 0; | |
57 | runtime->silence_start = runtime->control->appl_ptr; | |
58 | } | |
235475cb | 59 | if (runtime->silence_filled >= runtime->buffer_size) |
1da177e4 | 60 | return; |
1da177e4 LT |
61 | noise_dist = snd_pcm_playback_hw_avail(runtime) + runtime->silence_filled; |
62 | if (noise_dist >= (snd_pcm_sframes_t) runtime->silence_threshold) | |
63 | return; | |
64 | frames = runtime->silence_threshold - noise_dist; | |
65 | if (frames > runtime->silence_size) | |
66 | frames = runtime->silence_size; | |
67 | } else { | |
68 | if (new_hw_ptr == ULONG_MAX) { /* initialization */ | |
69 | snd_pcm_sframes_t avail = snd_pcm_playback_hw_avail(runtime); | |
70 | runtime->silence_filled = avail > 0 ? avail : 0; | |
71 | runtime->silence_start = (runtime->status->hw_ptr + | |
72 | runtime->silence_filled) % | |
73 | runtime->boundary; | |
74 | } else { | |
75 | ofs = runtime->status->hw_ptr; | |
76 | frames = new_hw_ptr - ofs; | |
77 | if ((snd_pcm_sframes_t)frames < 0) | |
78 | frames += runtime->boundary; | |
79 | runtime->silence_filled -= frames; | |
80 | if ((snd_pcm_sframes_t)runtime->silence_filled < 0) { | |
81 | runtime->silence_filled = 0; | |
9a826ddb | 82 | runtime->silence_start = new_hw_ptr; |
1da177e4 | 83 | } else { |
9a826ddb | 84 | runtime->silence_start = ofs; |
1da177e4 | 85 | } |
1da177e4 LT |
86 | } |
87 | frames = runtime->buffer_size - runtime->silence_filled; | |
88 | } | |
7eaa943c TI |
89 | if (snd_BUG_ON(frames > runtime->buffer_size)) |
90 | return; | |
1da177e4 LT |
91 | if (frames == 0) |
92 | return; | |
9a826ddb | 93 | ofs = runtime->silence_start % runtime->buffer_size; |
1da177e4 LT |
94 | while (frames > 0) { |
95 | transfer = ofs + frames > runtime->buffer_size ? runtime->buffer_size - ofs : frames; | |
96 | if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED || | |
97 | runtime->access == SNDRV_PCM_ACCESS_MMAP_INTERLEAVED) { | |
98 | if (substream->ops->silence) { | |
99 | int err; | |
100 | err = substream->ops->silence(substream, -1, ofs, transfer); | |
7eaa943c | 101 | snd_BUG_ON(err < 0); |
1da177e4 LT |
102 | } else { |
103 | char *hwbuf = runtime->dma_area + frames_to_bytes(runtime, ofs); | |
104 | snd_pcm_format_set_silence(runtime->format, hwbuf, transfer * runtime->channels); | |
105 | } | |
106 | } else { | |
107 | unsigned int c; | |
108 | unsigned int channels = runtime->channels; | |
109 | if (substream->ops->silence) { | |
110 | for (c = 0; c < channels; ++c) { | |
111 | int err; | |
112 | err = substream->ops->silence(substream, c, ofs, transfer); | |
7eaa943c | 113 | snd_BUG_ON(err < 0); |
1da177e4 LT |
114 | } |
115 | } else { | |
116 | size_t dma_csize = runtime->dma_bytes / channels; | |
117 | for (c = 0; c < channels; ++c) { | |
118 | char *hwbuf = runtime->dma_area + (c * dma_csize) + samples_to_bytes(runtime, ofs); | |
119 | snd_pcm_format_set_silence(runtime->format, hwbuf, transfer); | |
120 | } | |
121 | } | |
122 | } | |
123 | runtime->silence_filled += transfer; | |
124 | frames -= transfer; | |
125 | ofs = 0; | |
126 | } | |
127 | } | |
128 | ||
4d96eb25 JK |
129 | static void pcm_debug_name(struct snd_pcm_substream *substream, |
130 | char *name, size_t len) | |
131 | { | |
132 | snprintf(name, len, "pcmC%dD%d%c:%d", | |
133 | substream->pcm->card->number, | |
134 | substream->pcm->device, | |
135 | substream->stream ? 'c' : 'p', | |
136 | substream->number); | |
137 | } | |
138 | ||
741b20cf JK |
139 | #define XRUN_DEBUG_BASIC (1<<0) |
140 | #define XRUN_DEBUG_STACK (1<<1) /* dump also stack */ | |
141 | #define XRUN_DEBUG_JIFFIESCHECK (1<<2) /* do jiffies check */ | |
142 | #define XRUN_DEBUG_PERIODUPDATE (1<<3) /* full period update info */ | |
143 | #define XRUN_DEBUG_HWPTRUPDATE (1<<4) /* full hwptr update info */ | |
4d96eb25 JK |
144 | #define XRUN_DEBUG_LOG (1<<5) /* show last 10 positions on err */ |
145 | #define XRUN_DEBUG_LOGONCE (1<<6) /* do above only once */ | |
741b20cf | 146 | |
ed3da3d9 | 147 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
4d96eb25 | 148 | |
741b20cf JK |
149 | #define xrun_debug(substream, mask) \ |
150 | ((substream)->pstr->xrun_debug & (mask)) | |
ed3da3d9 | 151 | |
741b20cf JK |
152 | #define dump_stack_on_xrun(substream) do { \ |
153 | if (xrun_debug(substream, XRUN_DEBUG_STACK)) \ | |
154 | dump_stack(); \ | |
ed3da3d9 TI |
155 | } while (0) |
156 | ||
877211f5 | 157 | static void xrun(struct snd_pcm_substream *substream) |
1da177e4 | 158 | { |
13f040f9 JK |
159 | struct snd_pcm_runtime *runtime = substream->runtime; |
160 | ||
161 | if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) | |
162 | snd_pcm_gettime(runtime, (struct timespec *)&runtime->status->tstamp); | |
1da177e4 | 163 | snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN); |
741b20cf | 164 | if (xrun_debug(substream, XRUN_DEBUG_BASIC)) { |
c0070110 TI |
165 | char name[16]; |
166 | pcm_debug_name(substream, name, sizeof(name)); | |
167 | snd_printd(KERN_DEBUG "XRUN: %s\n", name); | |
ed3da3d9 | 168 | dump_stack_on_xrun(substream); |
1da177e4 | 169 | } |
1da177e4 LT |
170 | } |
171 | ||
4d96eb25 JK |
172 | #define hw_ptr_error(substream, fmt, args...) \ |
173 | do { \ | |
174 | if (xrun_debug(substream, XRUN_DEBUG_BASIC)) { \ | |
f240406b | 175 | xrun_log_show(substream); \ |
4d96eb25 JK |
176 | if (printk_ratelimit()) { \ |
177 | snd_printd("PCM: " fmt, ##args); \ | |
178 | } \ | |
179 | dump_stack_on_xrun(substream); \ | |
180 | } \ | |
181 | } while (0) | |
182 | ||
183 | #define XRUN_LOG_CNT 10 | |
184 | ||
185 | struct hwptr_log_entry { | |
186 | unsigned long jiffies; | |
187 | snd_pcm_uframes_t pos; | |
188 | snd_pcm_uframes_t period_size; | |
189 | snd_pcm_uframes_t buffer_size; | |
190 | snd_pcm_uframes_t old_hw_ptr; | |
191 | snd_pcm_uframes_t hw_ptr_base; | |
4d96eb25 JK |
192 | }; |
193 | ||
194 | struct snd_pcm_hwptr_log { | |
195 | unsigned int idx; | |
196 | unsigned int hit: 1; | |
197 | struct hwptr_log_entry entries[XRUN_LOG_CNT]; | |
198 | }; | |
199 | ||
200 | static void xrun_log(struct snd_pcm_substream *substream, | |
201 | snd_pcm_uframes_t pos) | |
202 | { | |
203 | struct snd_pcm_runtime *runtime = substream->runtime; | |
204 | struct snd_pcm_hwptr_log *log = runtime->hwptr_log; | |
205 | struct hwptr_log_entry *entry; | |
206 | ||
207 | if (log == NULL) { | |
208 | log = kzalloc(sizeof(*log), GFP_ATOMIC); | |
209 | if (log == NULL) | |
210 | return; | |
211 | runtime->hwptr_log = log; | |
212 | } else { | |
213 | if (xrun_debug(substream, XRUN_DEBUG_LOGONCE) && log->hit) | |
214 | return; | |
215 | } | |
216 | entry = &log->entries[log->idx]; | |
217 | entry->jiffies = jiffies; | |
218 | entry->pos = pos; | |
219 | entry->period_size = runtime->period_size; | |
220 | entry->buffer_size = runtime->buffer_size;; | |
221 | entry->old_hw_ptr = runtime->status->hw_ptr; | |
222 | entry->hw_ptr_base = runtime->hw_ptr_base; | |
4d96eb25 JK |
223 | log->idx = (log->idx + 1) % XRUN_LOG_CNT; |
224 | } | |
225 | ||
226 | static void xrun_log_show(struct snd_pcm_substream *substream) | |
227 | { | |
228 | struct snd_pcm_hwptr_log *log = substream->runtime->hwptr_log; | |
229 | struct hwptr_log_entry *entry; | |
230 | char name[16]; | |
231 | unsigned int idx; | |
232 | int cnt; | |
233 | ||
234 | if (log == NULL) | |
235 | return; | |
236 | if (xrun_debug(substream, XRUN_DEBUG_LOGONCE) && log->hit) | |
237 | return; | |
238 | pcm_debug_name(substream, name, sizeof(name)); | |
239 | for (cnt = 0, idx = log->idx; cnt < XRUN_LOG_CNT; cnt++) { | |
240 | entry = &log->entries[idx]; | |
241 | if (entry->period_size == 0) | |
242 | break; | |
f240406b JK |
243 | snd_printd("hwptr log: %s: j=%lu, pos=%ld/%ld/%ld, " |
244 | "hwptr=%ld/%ld\n", | |
4d96eb25 JK |
245 | name, entry->jiffies, (unsigned long)entry->pos, |
246 | (unsigned long)entry->period_size, | |
247 | (unsigned long)entry->buffer_size, | |
248 | (unsigned long)entry->old_hw_ptr, | |
f240406b | 249 | (unsigned long)entry->hw_ptr_base); |
4d96eb25 JK |
250 | idx++; |
251 | idx %= XRUN_LOG_CNT; | |
252 | } | |
253 | log->hit = 1; | |
254 | } | |
255 | ||
256 | #else /* ! CONFIG_SND_PCM_XRUN_DEBUG */ | |
257 | ||
258 | #define xrun_debug(substream, mask) 0 | |
259 | #define xrun(substream) do { } while (0) | |
260 | #define hw_ptr_error(substream, fmt, args...) do { } while (0) | |
261 | #define xrun_log(substream, pos) do { } while (0) | |
262 | #define xrun_log_show(substream) do { } while (0) | |
263 | ||
264 | #endif | |
265 | ||
98204646 TI |
266 | static int snd_pcm_update_hw_ptr_post(struct snd_pcm_substream *substream, |
267 | struct snd_pcm_runtime *runtime) | |
1da177e4 LT |
268 | { |
269 | snd_pcm_uframes_t avail; | |
270 | ||
271 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) | |
272 | avail = snd_pcm_playback_avail(runtime); | |
273 | else | |
274 | avail = snd_pcm_capture_avail(runtime); | |
275 | if (avail > runtime->avail_max) | |
276 | runtime->avail_max = avail; | |
4cdc115f TI |
277 | if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) { |
278 | if (avail >= runtime->buffer_size) { | |
1da177e4 | 279 | snd_pcm_drain_done(substream); |
4cdc115f TI |
280 | return -EPIPE; |
281 | } | |
282 | } else { | |
283 | if (avail >= runtime->stop_threshold) { | |
1da177e4 | 284 | xrun(substream); |
4cdc115f TI |
285 | return -EPIPE; |
286 | } | |
1da177e4 LT |
287 | } |
288 | if (avail >= runtime->control->avail_min) | |
289 | wake_up(&runtime->sleep); | |
290 | return 0; | |
291 | } | |
292 | ||
f240406b JK |
293 | static int snd_pcm_update_hw_ptr0(struct snd_pcm_substream *substream, |
294 | unsigned int in_interrupt) | |
1da177e4 | 295 | { |
877211f5 | 296 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 | 297 | snd_pcm_uframes_t pos; |
f240406b | 298 | snd_pcm_uframes_t old_hw_ptr, new_hw_ptr, hw_base; |
bbf6ad13 JK |
299 | snd_pcm_sframes_t hdelta, delta; |
300 | unsigned long jdelta; | |
1da177e4 | 301 | |
bbf6ad13 | 302 | old_hw_ptr = runtime->status->hw_ptr; |
f240406b | 303 | pos = substream->ops->pointer(substream); |
1da177e4 LT |
304 | if (pos == SNDRV_PCM_POS_XRUN) { |
305 | xrun(substream); | |
306 | return -EPIPE; | |
307 | } | |
f240406b JK |
308 | if (pos >= runtime->buffer_size) { |
309 | if (printk_ratelimit()) { | |
310 | char name[16]; | |
311 | pcm_debug_name(substream, name, sizeof(name)); | |
312 | xrun_log_show(substream); | |
313 | snd_printd(KERN_ERR "BUG: %s, pos = %ld, " | |
314 | "buffer size = %ld, period size = %ld\n", | |
315 | name, pos, runtime->buffer_size, | |
316 | runtime->period_size); | |
317 | } | |
318 | pos = 0; | |
cedb8118 | 319 | } |
f240406b JK |
320 | pos -= pos % runtime->min_align; |
321 | if (xrun_debug(substream, XRUN_DEBUG_LOG)) | |
322 | xrun_log(substream, pos); | |
ed3da3d9 TI |
323 | hw_base = runtime->hw_ptr_base; |
324 | new_hw_ptr = hw_base + pos; | |
f240406b JK |
325 | if (in_interrupt) { |
326 | /* we know that one period was processed */ | |
327 | /* delta = "expected next hw_ptr" for in_interrupt != 0 */ | |
328 | delta = old_hw_ptr - (old_hw_ptr % runtime->period_size) | |
329 | + runtime->period_size; | |
330 | if (delta > new_hw_ptr) { | |
ed3da3d9 | 331 | hw_base += runtime->buffer_size; |
8b22d943 | 332 | if (hw_base >= runtime->boundary) |
ed3da3d9 TI |
333 | hw_base = 0; |
334 | new_hw_ptr = hw_base + pos; | |
f240406b | 335 | goto __delta; |
1da177e4 | 336 | } |
1da177e4 | 337 | } |
f240406b JK |
338 | /* new_hw_ptr might be lower than old_hw_ptr in case when */ |
339 | /* pointer crosses the end of the ring buffer */ | |
340 | if (new_hw_ptr < old_hw_ptr) { | |
341 | hw_base += runtime->buffer_size; | |
342 | if (hw_base >= runtime->boundary) | |
343 | hw_base = 0; | |
344 | new_hw_ptr = hw_base + pos; | |
345 | } | |
346 | __delta: | |
347 | delta = (new_hw_ptr - old_hw_ptr) % runtime->boundary; | |
348 | if (xrun_debug(substream, in_interrupt ? | |
349 | XRUN_DEBUG_PERIODUPDATE : XRUN_DEBUG_HWPTRUPDATE)) { | |
350 | char name[16]; | |
351 | pcm_debug_name(substream, name, sizeof(name)); | |
352 | snd_printd("%s_update: %s: pos=%u/%u/%u, " | |
353 | "hwptr=%ld/%ld/%ld/%ld\n", | |
354 | in_interrupt ? "period" : "hwptr", | |
355 | name, | |
356 | (unsigned int)pos, | |
357 | (unsigned int)runtime->period_size, | |
358 | (unsigned int)runtime->buffer_size, | |
359 | (unsigned long)delta, | |
360 | (unsigned long)old_hw_ptr, | |
361 | (unsigned long)new_hw_ptr, | |
362 | (unsigned long)runtime->hw_ptr_base); | |
363 | } | |
364 | /* something must be really wrong */ | |
365 | if (delta >= runtime->buffer_size) { | |
366 | hw_ptr_error(substream, | |
367 | "Unexpected hw_pointer value %s" | |
368 | "(stream=%i, pos=%ld, new_hw_ptr=%ld, " | |
369 | "old_hw_ptr=%ld)\n", | |
370 | in_interrupt ? "[Q] " : "[P]", | |
371 | substream->stream, (long)pos, | |
372 | (long)new_hw_ptr, (long)old_hw_ptr); | |
373 | return 0; | |
374 | } | |
c87d9732 TI |
375 | |
376 | /* Do jiffies check only in xrun_debug mode */ | |
741b20cf | 377 | if (!xrun_debug(substream, XRUN_DEBUG_JIFFIESCHECK)) |
c87d9732 TI |
378 | goto no_jiffies_check; |
379 | ||
3e5b5016 TI |
380 | /* Skip the jiffies check for hardwares with BATCH flag. |
381 | * Such hardware usually just increases the position at each IRQ, | |
382 | * thus it can't give any strange position. | |
383 | */ | |
384 | if (runtime->hw.info & SNDRV_PCM_INFO_BATCH) | |
385 | goto no_jiffies_check; | |
f240406b | 386 | hdelta = delta; |
a4444da3 JK |
387 | if (hdelta < runtime->delay) |
388 | goto no_jiffies_check; | |
389 | hdelta -= runtime->delay; | |
bbf6ad13 JK |
390 | jdelta = jiffies - runtime->hw_ptr_jiffies; |
391 | if (((hdelta * HZ) / runtime->rate) > jdelta + HZ/100) { | |
392 | delta = jdelta / | |
393 | (((runtime->period_size * HZ) / runtime->rate) | |
394 | + HZ/100); | |
f240406b JK |
395 | /* move new_hw_ptr according jiffies not pos variable */ |
396 | new_hw_ptr = old_hw_ptr; | |
397 | /* use loop to avoid checks for delta overflows */ | |
398 | /* the delta value is small or zero in most cases */ | |
399 | while (delta > 0) { | |
400 | new_hw_ptr += runtime->period_size; | |
401 | if (new_hw_ptr >= runtime->boundary) | |
402 | new_hw_ptr -= runtime->boundary; | |
403 | delta--; | |
404 | } | |
405 | /* align hw_base to buffer_size */ | |
406 | hw_base = new_hw_ptr - (new_hw_ptr % runtime->buffer_size); | |
407 | delta = 0; | |
bbf6ad13 | 408 | hw_ptr_error(substream, |
f240406b | 409 | "hw_ptr skipping! %s" |
bbf6ad13 | 410 | "(pos=%ld, delta=%ld, period=%ld, " |
f240406b JK |
411 | "jdelta=%lu/%lu/%lu, hw_ptr=%ld/%ld)\n", |
412 | in_interrupt ? "[Q] " : "", | |
bbf6ad13 JK |
413 | (long)pos, (long)hdelta, |
414 | (long)runtime->period_size, jdelta, | |
f240406b JK |
415 | ((hdelta * HZ) / runtime->rate), delta, |
416 | (unsigned long)old_hw_ptr, | |
417 | (unsigned long)new_hw_ptr); | |
bbf6ad13 | 418 | } |
3e5b5016 | 419 | no_jiffies_check: |
bbf6ad13 | 420 | if (delta > runtime->period_size + runtime->period_size / 2) { |
ed3da3d9 | 421 | hw_ptr_error(substream, |
f240406b JK |
422 | "Lost interrupts? %s" |
423 | "(stream=%i, delta=%ld, new_hw_ptr=%ld, " | |
424 | "old_hw_ptr=%ld)\n", | |
425 | in_interrupt ? "[Q] " : "", | |
ed3da3d9 | 426 | substream->stream, (long)delta, |
f240406b JK |
427 | (long)new_hw_ptr, |
428 | (long)old_hw_ptr); | |
ed3da3d9 | 429 | } |
f240406b JK |
430 | |
431 | if (runtime->status->hw_ptr == new_hw_ptr) | |
432 | return 0; | |
ab1863fc | 433 | |
1da177e4 LT |
434 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && |
435 | runtime->silence_size > 0) | |
436 | snd_pcm_playback_silence(substream, new_hw_ptr); | |
437 | ||
ed3da3d9 | 438 | runtime->hw_ptr_base = hw_base; |
1da177e4 | 439 | runtime->status->hw_ptr = new_hw_ptr; |
bbf6ad13 | 440 | runtime->hw_ptr_jiffies = jiffies; |
13f040f9 JK |
441 | if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) |
442 | snd_pcm_gettime(runtime, (struct timespec *)&runtime->status->tstamp); | |
1da177e4 LT |
443 | |
444 | return snd_pcm_update_hw_ptr_post(substream, runtime); | |
445 | } | |
446 | ||
447 | /* CAUTION: call it with irq disabled */ | |
877211f5 | 448 | int snd_pcm_update_hw_ptr(struct snd_pcm_substream *substream) |
1da177e4 | 449 | { |
f240406b | 450 | return snd_pcm_update_hw_ptr0(substream, 0); |
1da177e4 LT |
451 | } |
452 | ||
453 | /** | |
454 | * snd_pcm_set_ops - set the PCM operators | |
455 | * @pcm: the pcm instance | |
456 | * @direction: stream direction, SNDRV_PCM_STREAM_XXX | |
457 | * @ops: the operator table | |
458 | * | |
459 | * Sets the given PCM operators to the pcm instance. | |
460 | */ | |
877211f5 | 461 | void snd_pcm_set_ops(struct snd_pcm *pcm, int direction, struct snd_pcm_ops *ops) |
1da177e4 | 462 | { |
877211f5 TI |
463 | struct snd_pcm_str *stream = &pcm->streams[direction]; |
464 | struct snd_pcm_substream *substream; | |
1da177e4 LT |
465 | |
466 | for (substream = stream->substream; substream != NULL; substream = substream->next) | |
467 | substream->ops = ops; | |
468 | } | |
469 | ||
e88e8ae6 | 470 | EXPORT_SYMBOL(snd_pcm_set_ops); |
1da177e4 LT |
471 | |
472 | /** | |
473 | * snd_pcm_sync - set the PCM sync id | |
474 | * @substream: the pcm substream | |
475 | * | |
476 | * Sets the PCM sync identifier for the card. | |
477 | */ | |
877211f5 | 478 | void snd_pcm_set_sync(struct snd_pcm_substream *substream) |
1da177e4 | 479 | { |
877211f5 | 480 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
481 | |
482 | runtime->sync.id32[0] = substream->pcm->card->number; | |
483 | runtime->sync.id32[1] = -1; | |
484 | runtime->sync.id32[2] = -1; | |
485 | runtime->sync.id32[3] = -1; | |
486 | } | |
487 | ||
e88e8ae6 TI |
488 | EXPORT_SYMBOL(snd_pcm_set_sync); |
489 | ||
1da177e4 LT |
490 | /* |
491 | * Standard ioctl routine | |
492 | */ | |
493 | ||
1da177e4 LT |
494 | static inline unsigned int div32(unsigned int a, unsigned int b, |
495 | unsigned int *r) | |
496 | { | |
497 | if (b == 0) { | |
498 | *r = 0; | |
499 | return UINT_MAX; | |
500 | } | |
501 | *r = a % b; | |
502 | return a / b; | |
503 | } | |
504 | ||
505 | static inline unsigned int div_down(unsigned int a, unsigned int b) | |
506 | { | |
507 | if (b == 0) | |
508 | return UINT_MAX; | |
509 | return a / b; | |
510 | } | |
511 | ||
512 | static inline unsigned int div_up(unsigned int a, unsigned int b) | |
513 | { | |
514 | unsigned int r; | |
515 | unsigned int q; | |
516 | if (b == 0) | |
517 | return UINT_MAX; | |
518 | q = div32(a, b, &r); | |
519 | if (r) | |
520 | ++q; | |
521 | return q; | |
522 | } | |
523 | ||
524 | static inline unsigned int mul(unsigned int a, unsigned int b) | |
525 | { | |
526 | if (a == 0) | |
527 | return 0; | |
528 | if (div_down(UINT_MAX, a) < b) | |
529 | return UINT_MAX; | |
530 | return a * b; | |
531 | } | |
532 | ||
533 | static inline unsigned int muldiv32(unsigned int a, unsigned int b, | |
534 | unsigned int c, unsigned int *r) | |
535 | { | |
536 | u_int64_t n = (u_int64_t) a * b; | |
537 | if (c == 0) { | |
7eaa943c | 538 | snd_BUG_ON(!n); |
1da177e4 LT |
539 | *r = 0; |
540 | return UINT_MAX; | |
541 | } | |
3f7440a6 | 542 | n = div_u64_rem(n, c, r); |
1da177e4 LT |
543 | if (n >= UINT_MAX) { |
544 | *r = 0; | |
545 | return UINT_MAX; | |
546 | } | |
547 | return n; | |
548 | } | |
549 | ||
1da177e4 LT |
550 | /** |
551 | * snd_interval_refine - refine the interval value of configurator | |
552 | * @i: the interval value to refine | |
553 | * @v: the interval value to refer to | |
554 | * | |
555 | * Refines the interval value with the reference value. | |
556 | * The interval is changed to the range satisfying both intervals. | |
557 | * The interval status (min, max, integer, etc.) are evaluated. | |
558 | * | |
559 | * Returns non-zero if the value is changed, zero if not changed. | |
560 | */ | |
877211f5 | 561 | int snd_interval_refine(struct snd_interval *i, const struct snd_interval *v) |
1da177e4 LT |
562 | { |
563 | int changed = 0; | |
7eaa943c TI |
564 | if (snd_BUG_ON(snd_interval_empty(i))) |
565 | return -EINVAL; | |
1da177e4 LT |
566 | if (i->min < v->min) { |
567 | i->min = v->min; | |
568 | i->openmin = v->openmin; | |
569 | changed = 1; | |
570 | } else if (i->min == v->min && !i->openmin && v->openmin) { | |
571 | i->openmin = 1; | |
572 | changed = 1; | |
573 | } | |
574 | if (i->max > v->max) { | |
575 | i->max = v->max; | |
576 | i->openmax = v->openmax; | |
577 | changed = 1; | |
578 | } else if (i->max == v->max && !i->openmax && v->openmax) { | |
579 | i->openmax = 1; | |
580 | changed = 1; | |
581 | } | |
582 | if (!i->integer && v->integer) { | |
583 | i->integer = 1; | |
584 | changed = 1; | |
585 | } | |
586 | if (i->integer) { | |
587 | if (i->openmin) { | |
588 | i->min++; | |
589 | i->openmin = 0; | |
590 | } | |
591 | if (i->openmax) { | |
592 | i->max--; | |
593 | i->openmax = 0; | |
594 | } | |
595 | } else if (!i->openmin && !i->openmax && i->min == i->max) | |
596 | i->integer = 1; | |
597 | if (snd_interval_checkempty(i)) { | |
598 | snd_interval_none(i); | |
599 | return -EINVAL; | |
600 | } | |
601 | return changed; | |
602 | } | |
603 | ||
e88e8ae6 TI |
604 | EXPORT_SYMBOL(snd_interval_refine); |
605 | ||
877211f5 | 606 | static int snd_interval_refine_first(struct snd_interval *i) |
1da177e4 | 607 | { |
7eaa943c TI |
608 | if (snd_BUG_ON(snd_interval_empty(i))) |
609 | return -EINVAL; | |
1da177e4 LT |
610 | if (snd_interval_single(i)) |
611 | return 0; | |
612 | i->max = i->min; | |
613 | i->openmax = i->openmin; | |
614 | if (i->openmax) | |
615 | i->max++; | |
616 | return 1; | |
617 | } | |
618 | ||
877211f5 | 619 | static int snd_interval_refine_last(struct snd_interval *i) |
1da177e4 | 620 | { |
7eaa943c TI |
621 | if (snd_BUG_ON(snd_interval_empty(i))) |
622 | return -EINVAL; | |
1da177e4 LT |
623 | if (snd_interval_single(i)) |
624 | return 0; | |
625 | i->min = i->max; | |
626 | i->openmin = i->openmax; | |
627 | if (i->openmin) | |
628 | i->min--; | |
629 | return 1; | |
630 | } | |
631 | ||
877211f5 | 632 | void snd_interval_mul(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c) |
1da177e4 LT |
633 | { |
634 | if (a->empty || b->empty) { | |
635 | snd_interval_none(c); | |
636 | return; | |
637 | } | |
638 | c->empty = 0; | |
639 | c->min = mul(a->min, b->min); | |
640 | c->openmin = (a->openmin || b->openmin); | |
641 | c->max = mul(a->max, b->max); | |
642 | c->openmax = (a->openmax || b->openmax); | |
643 | c->integer = (a->integer && b->integer); | |
644 | } | |
645 | ||
646 | /** | |
647 | * snd_interval_div - refine the interval value with division | |
df8db936 TI |
648 | * @a: dividend |
649 | * @b: divisor | |
650 | * @c: quotient | |
1da177e4 LT |
651 | * |
652 | * c = a / b | |
653 | * | |
654 | * Returns non-zero if the value is changed, zero if not changed. | |
655 | */ | |
877211f5 | 656 | void snd_interval_div(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c) |
1da177e4 LT |
657 | { |
658 | unsigned int r; | |
659 | if (a->empty || b->empty) { | |
660 | snd_interval_none(c); | |
661 | return; | |
662 | } | |
663 | c->empty = 0; | |
664 | c->min = div32(a->min, b->max, &r); | |
665 | c->openmin = (r || a->openmin || b->openmax); | |
666 | if (b->min > 0) { | |
667 | c->max = div32(a->max, b->min, &r); | |
668 | if (r) { | |
669 | c->max++; | |
670 | c->openmax = 1; | |
671 | } else | |
672 | c->openmax = (a->openmax || b->openmin); | |
673 | } else { | |
674 | c->max = UINT_MAX; | |
675 | c->openmax = 0; | |
676 | } | |
677 | c->integer = 0; | |
678 | } | |
679 | ||
680 | /** | |
681 | * snd_interval_muldivk - refine the interval value | |
df8db936 TI |
682 | * @a: dividend 1 |
683 | * @b: dividend 2 | |
684 | * @k: divisor (as integer) | |
685 | * @c: result | |
686 | * | |
1da177e4 LT |
687 | * c = a * b / k |
688 | * | |
689 | * Returns non-zero if the value is changed, zero if not changed. | |
690 | */ | |
877211f5 TI |
691 | void snd_interval_muldivk(const struct snd_interval *a, const struct snd_interval *b, |
692 | unsigned int k, struct snd_interval *c) | |
1da177e4 LT |
693 | { |
694 | unsigned int r; | |
695 | if (a->empty || b->empty) { | |
696 | snd_interval_none(c); | |
697 | return; | |
698 | } | |
699 | c->empty = 0; | |
700 | c->min = muldiv32(a->min, b->min, k, &r); | |
701 | c->openmin = (r || a->openmin || b->openmin); | |
702 | c->max = muldiv32(a->max, b->max, k, &r); | |
703 | if (r) { | |
704 | c->max++; | |
705 | c->openmax = 1; | |
706 | } else | |
707 | c->openmax = (a->openmax || b->openmax); | |
708 | c->integer = 0; | |
709 | } | |
710 | ||
711 | /** | |
712 | * snd_interval_mulkdiv - refine the interval value | |
df8db936 TI |
713 | * @a: dividend 1 |
714 | * @k: dividend 2 (as integer) | |
715 | * @b: divisor | |
716 | * @c: result | |
1da177e4 LT |
717 | * |
718 | * c = a * k / b | |
719 | * | |
720 | * Returns non-zero if the value is changed, zero if not changed. | |
721 | */ | |
877211f5 TI |
722 | void snd_interval_mulkdiv(const struct snd_interval *a, unsigned int k, |
723 | const struct snd_interval *b, struct snd_interval *c) | |
1da177e4 LT |
724 | { |
725 | unsigned int r; | |
726 | if (a->empty || b->empty) { | |
727 | snd_interval_none(c); | |
728 | return; | |
729 | } | |
730 | c->empty = 0; | |
731 | c->min = muldiv32(a->min, k, b->max, &r); | |
732 | c->openmin = (r || a->openmin || b->openmax); | |
733 | if (b->min > 0) { | |
734 | c->max = muldiv32(a->max, k, b->min, &r); | |
735 | if (r) { | |
736 | c->max++; | |
737 | c->openmax = 1; | |
738 | } else | |
739 | c->openmax = (a->openmax || b->openmin); | |
740 | } else { | |
741 | c->max = UINT_MAX; | |
742 | c->openmax = 0; | |
743 | } | |
744 | c->integer = 0; | |
745 | } | |
746 | ||
1da177e4 LT |
747 | /* ---- */ |
748 | ||
749 | ||
750 | /** | |
751 | * snd_interval_ratnum - refine the interval value | |
df8db936 TI |
752 | * @i: interval to refine |
753 | * @rats_count: number of ratnum_t | |
754 | * @rats: ratnum_t array | |
755 | * @nump: pointer to store the resultant numerator | |
756 | * @denp: pointer to store the resultant denominator | |
1da177e4 LT |
757 | * |
758 | * Returns non-zero if the value is changed, zero if not changed. | |
759 | */ | |
877211f5 TI |
760 | int snd_interval_ratnum(struct snd_interval *i, |
761 | unsigned int rats_count, struct snd_ratnum *rats, | |
762 | unsigned int *nump, unsigned int *denp) | |
1da177e4 LT |
763 | { |
764 | unsigned int best_num, best_diff, best_den; | |
765 | unsigned int k; | |
877211f5 | 766 | struct snd_interval t; |
1da177e4 LT |
767 | int err; |
768 | ||
769 | best_num = best_den = best_diff = 0; | |
770 | for (k = 0; k < rats_count; ++k) { | |
771 | unsigned int num = rats[k].num; | |
772 | unsigned int den; | |
773 | unsigned int q = i->min; | |
774 | int diff; | |
775 | if (q == 0) | |
776 | q = 1; | |
777 | den = div_down(num, q); | |
778 | if (den < rats[k].den_min) | |
779 | continue; | |
780 | if (den > rats[k].den_max) | |
781 | den = rats[k].den_max; | |
782 | else { | |
783 | unsigned int r; | |
784 | r = (den - rats[k].den_min) % rats[k].den_step; | |
785 | if (r != 0) | |
786 | den -= r; | |
787 | } | |
788 | diff = num - q * den; | |
789 | if (best_num == 0 || | |
790 | diff * best_den < best_diff * den) { | |
791 | best_diff = diff; | |
792 | best_den = den; | |
793 | best_num = num; | |
794 | } | |
795 | } | |
796 | if (best_den == 0) { | |
797 | i->empty = 1; | |
798 | return -EINVAL; | |
799 | } | |
800 | t.min = div_down(best_num, best_den); | |
801 | t.openmin = !!(best_num % best_den); | |
802 | ||
803 | best_num = best_den = best_diff = 0; | |
804 | for (k = 0; k < rats_count; ++k) { | |
805 | unsigned int num = rats[k].num; | |
806 | unsigned int den; | |
807 | unsigned int q = i->max; | |
808 | int diff; | |
809 | if (q == 0) { | |
810 | i->empty = 1; | |
811 | return -EINVAL; | |
812 | } | |
813 | den = div_up(num, q); | |
814 | if (den > rats[k].den_max) | |
815 | continue; | |
816 | if (den < rats[k].den_min) | |
817 | den = rats[k].den_min; | |
818 | else { | |
819 | unsigned int r; | |
820 | r = (den - rats[k].den_min) % rats[k].den_step; | |
821 | if (r != 0) | |
822 | den += rats[k].den_step - r; | |
823 | } | |
824 | diff = q * den - num; | |
825 | if (best_num == 0 || | |
826 | diff * best_den < best_diff * den) { | |
827 | best_diff = diff; | |
828 | best_den = den; | |
829 | best_num = num; | |
830 | } | |
831 | } | |
832 | if (best_den == 0) { | |
833 | i->empty = 1; | |
834 | return -EINVAL; | |
835 | } | |
836 | t.max = div_up(best_num, best_den); | |
837 | t.openmax = !!(best_num % best_den); | |
838 | t.integer = 0; | |
839 | err = snd_interval_refine(i, &t); | |
840 | if (err < 0) | |
841 | return err; | |
842 | ||
843 | if (snd_interval_single(i)) { | |
844 | if (nump) | |
845 | *nump = best_num; | |
846 | if (denp) | |
847 | *denp = best_den; | |
848 | } | |
849 | return err; | |
850 | } | |
851 | ||
e88e8ae6 TI |
852 | EXPORT_SYMBOL(snd_interval_ratnum); |
853 | ||
1da177e4 LT |
854 | /** |
855 | * snd_interval_ratden - refine the interval value | |
df8db936 | 856 | * @i: interval to refine |
877211f5 TI |
857 | * @rats_count: number of struct ratden |
858 | * @rats: struct ratden array | |
df8db936 TI |
859 | * @nump: pointer to store the resultant numerator |
860 | * @denp: pointer to store the resultant denominator | |
1da177e4 LT |
861 | * |
862 | * Returns non-zero if the value is changed, zero if not changed. | |
863 | */ | |
877211f5 TI |
864 | static int snd_interval_ratden(struct snd_interval *i, |
865 | unsigned int rats_count, struct snd_ratden *rats, | |
1da177e4 LT |
866 | unsigned int *nump, unsigned int *denp) |
867 | { | |
868 | unsigned int best_num, best_diff, best_den; | |
869 | unsigned int k; | |
877211f5 | 870 | struct snd_interval t; |
1da177e4 LT |
871 | int err; |
872 | ||
873 | best_num = best_den = best_diff = 0; | |
874 | for (k = 0; k < rats_count; ++k) { | |
875 | unsigned int num; | |
876 | unsigned int den = rats[k].den; | |
877 | unsigned int q = i->min; | |
878 | int diff; | |
879 | num = mul(q, den); | |
880 | if (num > rats[k].num_max) | |
881 | continue; | |
882 | if (num < rats[k].num_min) | |
883 | num = rats[k].num_max; | |
884 | else { | |
885 | unsigned int r; | |
886 | r = (num - rats[k].num_min) % rats[k].num_step; | |
887 | if (r != 0) | |
888 | num += rats[k].num_step - r; | |
889 | } | |
890 | diff = num - q * den; | |
891 | if (best_num == 0 || | |
892 | diff * best_den < best_diff * den) { | |
893 | best_diff = diff; | |
894 | best_den = den; | |
895 | best_num = num; | |
896 | } | |
897 | } | |
898 | if (best_den == 0) { | |
899 | i->empty = 1; | |
900 | return -EINVAL; | |
901 | } | |
902 | t.min = div_down(best_num, best_den); | |
903 | t.openmin = !!(best_num % best_den); | |
904 | ||
905 | best_num = best_den = best_diff = 0; | |
906 | for (k = 0; k < rats_count; ++k) { | |
907 | unsigned int num; | |
908 | unsigned int den = rats[k].den; | |
909 | unsigned int q = i->max; | |
910 | int diff; | |
911 | num = mul(q, den); | |
912 | if (num < rats[k].num_min) | |
913 | continue; | |
914 | if (num > rats[k].num_max) | |
915 | num = rats[k].num_max; | |
916 | else { | |
917 | unsigned int r; | |
918 | r = (num - rats[k].num_min) % rats[k].num_step; | |
919 | if (r != 0) | |
920 | num -= r; | |
921 | } | |
922 | diff = q * den - num; | |
923 | if (best_num == 0 || | |
924 | diff * best_den < best_diff * den) { | |
925 | best_diff = diff; | |
926 | best_den = den; | |
927 | best_num = num; | |
928 | } | |
929 | } | |
930 | if (best_den == 0) { | |
931 | i->empty = 1; | |
932 | return -EINVAL; | |
933 | } | |
934 | t.max = div_up(best_num, best_den); | |
935 | t.openmax = !!(best_num % best_den); | |
936 | t.integer = 0; | |
937 | err = snd_interval_refine(i, &t); | |
938 | if (err < 0) | |
939 | return err; | |
940 | ||
941 | if (snd_interval_single(i)) { | |
942 | if (nump) | |
943 | *nump = best_num; | |
944 | if (denp) | |
945 | *denp = best_den; | |
946 | } | |
947 | return err; | |
948 | } | |
949 | ||
950 | /** | |
951 | * snd_interval_list - refine the interval value from the list | |
952 | * @i: the interval value to refine | |
953 | * @count: the number of elements in the list | |
954 | * @list: the value list | |
955 | * @mask: the bit-mask to evaluate | |
956 | * | |
957 | * Refines the interval value from the list. | |
958 | * When mask is non-zero, only the elements corresponding to bit 1 are | |
959 | * evaluated. | |
960 | * | |
961 | * Returns non-zero if the value is changed, zero if not changed. | |
962 | */ | |
877211f5 | 963 | int snd_interval_list(struct snd_interval *i, unsigned int count, unsigned int *list, unsigned int mask) |
1da177e4 LT |
964 | { |
965 | unsigned int k; | |
b1ddaf68 | 966 | struct snd_interval list_range; |
0981a260 TI |
967 | |
968 | if (!count) { | |
969 | i->empty = 1; | |
970 | return -EINVAL; | |
971 | } | |
b1ddaf68 CL |
972 | snd_interval_any(&list_range); |
973 | list_range.min = UINT_MAX; | |
974 | list_range.max = 0; | |
1da177e4 LT |
975 | for (k = 0; k < count; k++) { |
976 | if (mask && !(mask & (1 << k))) | |
977 | continue; | |
b1ddaf68 | 978 | if (!snd_interval_test(i, list[k])) |
1da177e4 | 979 | continue; |
b1ddaf68 CL |
980 | list_range.min = min(list_range.min, list[k]); |
981 | list_range.max = max(list_range.max, list[k]); | |
1da177e4 | 982 | } |
b1ddaf68 | 983 | return snd_interval_refine(i, &list_range); |
1da177e4 LT |
984 | } |
985 | ||
e88e8ae6 TI |
986 | EXPORT_SYMBOL(snd_interval_list); |
987 | ||
877211f5 | 988 | static int snd_interval_step(struct snd_interval *i, unsigned int min, unsigned int step) |
1da177e4 LT |
989 | { |
990 | unsigned int n; | |
991 | int changed = 0; | |
992 | n = (i->min - min) % step; | |
993 | if (n != 0 || i->openmin) { | |
994 | i->min += step - n; | |
995 | changed = 1; | |
996 | } | |
997 | n = (i->max - min) % step; | |
998 | if (n != 0 || i->openmax) { | |
999 | i->max -= n; | |
1000 | changed = 1; | |
1001 | } | |
1002 | if (snd_interval_checkempty(i)) { | |
1003 | i->empty = 1; | |
1004 | return -EINVAL; | |
1005 | } | |
1006 | return changed; | |
1007 | } | |
1008 | ||
1009 | /* Info constraints helpers */ | |
1010 | ||
1011 | /** | |
1012 | * snd_pcm_hw_rule_add - add the hw-constraint rule | |
1013 | * @runtime: the pcm runtime instance | |
1014 | * @cond: condition bits | |
1015 | * @var: the variable to evaluate | |
1016 | * @func: the evaluation function | |
1017 | * @private: the private data pointer passed to function | |
1018 | * @dep: the dependent variables | |
1019 | * | |
1020 | * Returns zero if successful, or a negative error code on failure. | |
1021 | */ | |
877211f5 | 1022 | int snd_pcm_hw_rule_add(struct snd_pcm_runtime *runtime, unsigned int cond, |
1da177e4 LT |
1023 | int var, |
1024 | snd_pcm_hw_rule_func_t func, void *private, | |
1025 | int dep, ...) | |
1026 | { | |
877211f5 TI |
1027 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; |
1028 | struct snd_pcm_hw_rule *c; | |
1da177e4 LT |
1029 | unsigned int k; |
1030 | va_list args; | |
1031 | va_start(args, dep); | |
1032 | if (constrs->rules_num >= constrs->rules_all) { | |
877211f5 | 1033 | struct snd_pcm_hw_rule *new; |
1da177e4 LT |
1034 | unsigned int new_rules = constrs->rules_all + 16; |
1035 | new = kcalloc(new_rules, sizeof(*c), GFP_KERNEL); | |
1036 | if (!new) | |
1037 | return -ENOMEM; | |
1038 | if (constrs->rules) { | |
1039 | memcpy(new, constrs->rules, | |
1040 | constrs->rules_num * sizeof(*c)); | |
1041 | kfree(constrs->rules); | |
1042 | } | |
1043 | constrs->rules = new; | |
1044 | constrs->rules_all = new_rules; | |
1045 | } | |
1046 | c = &constrs->rules[constrs->rules_num]; | |
1047 | c->cond = cond; | |
1048 | c->func = func; | |
1049 | c->var = var; | |
1050 | c->private = private; | |
1051 | k = 0; | |
1052 | while (1) { | |
7eaa943c TI |
1053 | if (snd_BUG_ON(k >= ARRAY_SIZE(c->deps))) |
1054 | return -EINVAL; | |
1da177e4 LT |
1055 | c->deps[k++] = dep; |
1056 | if (dep < 0) | |
1057 | break; | |
1058 | dep = va_arg(args, int); | |
1059 | } | |
1060 | constrs->rules_num++; | |
1061 | va_end(args); | |
1062 | return 0; | |
1063 | } | |
1064 | ||
e88e8ae6 TI |
1065 | EXPORT_SYMBOL(snd_pcm_hw_rule_add); |
1066 | ||
1da177e4 | 1067 | /** |
1c85cc64 | 1068 | * snd_pcm_hw_constraint_mask - apply the given bitmap mask constraint |
df8db936 TI |
1069 | * @runtime: PCM runtime instance |
1070 | * @var: hw_params variable to apply the mask | |
1071 | * @mask: the bitmap mask | |
1072 | * | |
1c85cc64 | 1073 | * Apply the constraint of the given bitmap mask to a 32-bit mask parameter. |
1da177e4 | 1074 | */ |
877211f5 | 1075 | int snd_pcm_hw_constraint_mask(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, |
1da177e4 LT |
1076 | u_int32_t mask) |
1077 | { | |
877211f5 TI |
1078 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; |
1079 | struct snd_mask *maskp = constrs_mask(constrs, var); | |
1da177e4 LT |
1080 | *maskp->bits &= mask; |
1081 | memset(maskp->bits + 1, 0, (SNDRV_MASK_MAX-32) / 8); /* clear rest */ | |
1082 | if (*maskp->bits == 0) | |
1083 | return -EINVAL; | |
1084 | return 0; | |
1085 | } | |
1086 | ||
1087 | /** | |
1c85cc64 | 1088 | * snd_pcm_hw_constraint_mask64 - apply the given bitmap mask constraint |
df8db936 TI |
1089 | * @runtime: PCM runtime instance |
1090 | * @var: hw_params variable to apply the mask | |
1091 | * @mask: the 64bit bitmap mask | |
1092 | * | |
1c85cc64 | 1093 | * Apply the constraint of the given bitmap mask to a 64-bit mask parameter. |
1da177e4 | 1094 | */ |
877211f5 | 1095 | int snd_pcm_hw_constraint_mask64(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, |
1da177e4 LT |
1096 | u_int64_t mask) |
1097 | { | |
877211f5 TI |
1098 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; |
1099 | struct snd_mask *maskp = constrs_mask(constrs, var); | |
1da177e4 LT |
1100 | maskp->bits[0] &= (u_int32_t)mask; |
1101 | maskp->bits[1] &= (u_int32_t)(mask >> 32); | |
1102 | memset(maskp->bits + 2, 0, (SNDRV_MASK_MAX-64) / 8); /* clear rest */ | |
1103 | if (! maskp->bits[0] && ! maskp->bits[1]) | |
1104 | return -EINVAL; | |
1105 | return 0; | |
1106 | } | |
1107 | ||
1108 | /** | |
1c85cc64 | 1109 | * snd_pcm_hw_constraint_integer - apply an integer constraint to an interval |
df8db936 TI |
1110 | * @runtime: PCM runtime instance |
1111 | * @var: hw_params variable to apply the integer constraint | |
1112 | * | |
1113 | * Apply the constraint of integer to an interval parameter. | |
1da177e4 | 1114 | */ |
877211f5 | 1115 | int snd_pcm_hw_constraint_integer(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var) |
1da177e4 | 1116 | { |
877211f5 | 1117 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; |
1da177e4 LT |
1118 | return snd_interval_setinteger(constrs_interval(constrs, var)); |
1119 | } | |
1120 | ||
e88e8ae6 TI |
1121 | EXPORT_SYMBOL(snd_pcm_hw_constraint_integer); |
1122 | ||
1da177e4 | 1123 | /** |
1c85cc64 | 1124 | * snd_pcm_hw_constraint_minmax - apply a min/max range constraint to an interval |
df8db936 TI |
1125 | * @runtime: PCM runtime instance |
1126 | * @var: hw_params variable to apply the range | |
1127 | * @min: the minimal value | |
1128 | * @max: the maximal value | |
1129 | * | |
1130 | * Apply the min/max range constraint to an interval parameter. | |
1da177e4 | 1131 | */ |
877211f5 | 1132 | int snd_pcm_hw_constraint_minmax(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, |
1da177e4 LT |
1133 | unsigned int min, unsigned int max) |
1134 | { | |
877211f5 TI |
1135 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; |
1136 | struct snd_interval t; | |
1da177e4 LT |
1137 | t.min = min; |
1138 | t.max = max; | |
1139 | t.openmin = t.openmax = 0; | |
1140 | t.integer = 0; | |
1141 | return snd_interval_refine(constrs_interval(constrs, var), &t); | |
1142 | } | |
1143 | ||
e88e8ae6 TI |
1144 | EXPORT_SYMBOL(snd_pcm_hw_constraint_minmax); |
1145 | ||
877211f5 TI |
1146 | static int snd_pcm_hw_rule_list(struct snd_pcm_hw_params *params, |
1147 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 1148 | { |
877211f5 | 1149 | struct snd_pcm_hw_constraint_list *list = rule->private; |
1da177e4 LT |
1150 | return snd_interval_list(hw_param_interval(params, rule->var), list->count, list->list, list->mask); |
1151 | } | |
1152 | ||
1153 | ||
1154 | /** | |
1c85cc64 | 1155 | * snd_pcm_hw_constraint_list - apply a list of constraints to a parameter |
df8db936 TI |
1156 | * @runtime: PCM runtime instance |
1157 | * @cond: condition bits | |
1158 | * @var: hw_params variable to apply the list constraint | |
1159 | * @l: list | |
1160 | * | |
1161 | * Apply the list of constraints to an interval parameter. | |
1da177e4 | 1162 | */ |
877211f5 | 1163 | int snd_pcm_hw_constraint_list(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1164 | unsigned int cond, |
1165 | snd_pcm_hw_param_t var, | |
877211f5 | 1166 | struct snd_pcm_hw_constraint_list *l) |
1da177e4 LT |
1167 | { |
1168 | return snd_pcm_hw_rule_add(runtime, cond, var, | |
1169 | snd_pcm_hw_rule_list, l, | |
1170 | var, -1); | |
1171 | } | |
1172 | ||
e88e8ae6 TI |
1173 | EXPORT_SYMBOL(snd_pcm_hw_constraint_list); |
1174 | ||
877211f5 TI |
1175 | static int snd_pcm_hw_rule_ratnums(struct snd_pcm_hw_params *params, |
1176 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 1177 | { |
877211f5 | 1178 | struct snd_pcm_hw_constraint_ratnums *r = rule->private; |
1da177e4 LT |
1179 | unsigned int num = 0, den = 0; |
1180 | int err; | |
1181 | err = snd_interval_ratnum(hw_param_interval(params, rule->var), | |
1182 | r->nrats, r->rats, &num, &den); | |
1183 | if (err >= 0 && den && rule->var == SNDRV_PCM_HW_PARAM_RATE) { | |
1184 | params->rate_num = num; | |
1185 | params->rate_den = den; | |
1186 | } | |
1187 | return err; | |
1188 | } | |
1189 | ||
1190 | /** | |
1c85cc64 | 1191 | * snd_pcm_hw_constraint_ratnums - apply ratnums constraint to a parameter |
df8db936 TI |
1192 | * @runtime: PCM runtime instance |
1193 | * @cond: condition bits | |
1194 | * @var: hw_params variable to apply the ratnums constraint | |
877211f5 | 1195 | * @r: struct snd_ratnums constriants |
1da177e4 | 1196 | */ |
877211f5 | 1197 | int snd_pcm_hw_constraint_ratnums(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1198 | unsigned int cond, |
1199 | snd_pcm_hw_param_t var, | |
877211f5 | 1200 | struct snd_pcm_hw_constraint_ratnums *r) |
1da177e4 LT |
1201 | { |
1202 | return snd_pcm_hw_rule_add(runtime, cond, var, | |
1203 | snd_pcm_hw_rule_ratnums, r, | |
1204 | var, -1); | |
1205 | } | |
1206 | ||
e88e8ae6 TI |
1207 | EXPORT_SYMBOL(snd_pcm_hw_constraint_ratnums); |
1208 | ||
877211f5 TI |
1209 | static int snd_pcm_hw_rule_ratdens(struct snd_pcm_hw_params *params, |
1210 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 1211 | { |
877211f5 | 1212 | struct snd_pcm_hw_constraint_ratdens *r = rule->private; |
1da177e4 LT |
1213 | unsigned int num = 0, den = 0; |
1214 | int err = snd_interval_ratden(hw_param_interval(params, rule->var), | |
1215 | r->nrats, r->rats, &num, &den); | |
1216 | if (err >= 0 && den && rule->var == SNDRV_PCM_HW_PARAM_RATE) { | |
1217 | params->rate_num = num; | |
1218 | params->rate_den = den; | |
1219 | } | |
1220 | return err; | |
1221 | } | |
1222 | ||
1223 | /** | |
1c85cc64 | 1224 | * snd_pcm_hw_constraint_ratdens - apply ratdens constraint to a parameter |
df8db936 TI |
1225 | * @runtime: PCM runtime instance |
1226 | * @cond: condition bits | |
1227 | * @var: hw_params variable to apply the ratdens constraint | |
877211f5 | 1228 | * @r: struct snd_ratdens constriants |
1da177e4 | 1229 | */ |
877211f5 | 1230 | int snd_pcm_hw_constraint_ratdens(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1231 | unsigned int cond, |
1232 | snd_pcm_hw_param_t var, | |
877211f5 | 1233 | struct snd_pcm_hw_constraint_ratdens *r) |
1da177e4 LT |
1234 | { |
1235 | return snd_pcm_hw_rule_add(runtime, cond, var, | |
1236 | snd_pcm_hw_rule_ratdens, r, | |
1237 | var, -1); | |
1238 | } | |
1239 | ||
e88e8ae6 TI |
1240 | EXPORT_SYMBOL(snd_pcm_hw_constraint_ratdens); |
1241 | ||
877211f5 TI |
1242 | static int snd_pcm_hw_rule_msbits(struct snd_pcm_hw_params *params, |
1243 | struct snd_pcm_hw_rule *rule) | |
1da177e4 LT |
1244 | { |
1245 | unsigned int l = (unsigned long) rule->private; | |
1246 | int width = l & 0xffff; | |
1247 | unsigned int msbits = l >> 16; | |
877211f5 | 1248 | struct snd_interval *i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS); |
1da177e4 LT |
1249 | if (snd_interval_single(i) && snd_interval_value(i) == width) |
1250 | params->msbits = msbits; | |
1251 | return 0; | |
1252 | } | |
1253 | ||
1254 | /** | |
1c85cc64 | 1255 | * snd_pcm_hw_constraint_msbits - add a hw constraint msbits rule |
df8db936 TI |
1256 | * @runtime: PCM runtime instance |
1257 | * @cond: condition bits | |
1258 | * @width: sample bits width | |
1259 | * @msbits: msbits width | |
1da177e4 | 1260 | */ |
877211f5 | 1261 | int snd_pcm_hw_constraint_msbits(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1262 | unsigned int cond, |
1263 | unsigned int width, | |
1264 | unsigned int msbits) | |
1265 | { | |
1266 | unsigned long l = (msbits << 16) | width; | |
1267 | return snd_pcm_hw_rule_add(runtime, cond, -1, | |
1268 | snd_pcm_hw_rule_msbits, | |
1269 | (void*) l, | |
1270 | SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); | |
1271 | } | |
1272 | ||
e88e8ae6 TI |
1273 | EXPORT_SYMBOL(snd_pcm_hw_constraint_msbits); |
1274 | ||
877211f5 TI |
1275 | static int snd_pcm_hw_rule_step(struct snd_pcm_hw_params *params, |
1276 | struct snd_pcm_hw_rule *rule) | |
1da177e4 LT |
1277 | { |
1278 | unsigned long step = (unsigned long) rule->private; | |
1279 | return snd_interval_step(hw_param_interval(params, rule->var), 0, step); | |
1280 | } | |
1281 | ||
1282 | /** | |
1c85cc64 | 1283 | * snd_pcm_hw_constraint_step - add a hw constraint step rule |
df8db936 TI |
1284 | * @runtime: PCM runtime instance |
1285 | * @cond: condition bits | |
1286 | * @var: hw_params variable to apply the step constraint | |
1287 | * @step: step size | |
1da177e4 | 1288 | */ |
877211f5 | 1289 | int snd_pcm_hw_constraint_step(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1290 | unsigned int cond, |
1291 | snd_pcm_hw_param_t var, | |
1292 | unsigned long step) | |
1293 | { | |
1294 | return snd_pcm_hw_rule_add(runtime, cond, var, | |
1295 | snd_pcm_hw_rule_step, (void *) step, | |
1296 | var, -1); | |
1297 | } | |
1298 | ||
e88e8ae6 TI |
1299 | EXPORT_SYMBOL(snd_pcm_hw_constraint_step); |
1300 | ||
877211f5 | 1301 | static int snd_pcm_hw_rule_pow2(struct snd_pcm_hw_params *params, struct snd_pcm_hw_rule *rule) |
1da177e4 | 1302 | { |
67c39317 | 1303 | static unsigned int pow2_sizes[] = { |
1da177e4 LT |
1304 | 1<<0, 1<<1, 1<<2, 1<<3, 1<<4, 1<<5, 1<<6, 1<<7, |
1305 | 1<<8, 1<<9, 1<<10, 1<<11, 1<<12, 1<<13, 1<<14, 1<<15, | |
1306 | 1<<16, 1<<17, 1<<18, 1<<19, 1<<20, 1<<21, 1<<22, 1<<23, | |
1307 | 1<<24, 1<<25, 1<<26, 1<<27, 1<<28, 1<<29, 1<<30 | |
1308 | }; | |
1309 | return snd_interval_list(hw_param_interval(params, rule->var), | |
1310 | ARRAY_SIZE(pow2_sizes), pow2_sizes, 0); | |
1311 | } | |
1312 | ||
1313 | /** | |
1c85cc64 | 1314 | * snd_pcm_hw_constraint_pow2 - add a hw constraint power-of-2 rule |
df8db936 TI |
1315 | * @runtime: PCM runtime instance |
1316 | * @cond: condition bits | |
1317 | * @var: hw_params variable to apply the power-of-2 constraint | |
1da177e4 | 1318 | */ |
877211f5 | 1319 | int snd_pcm_hw_constraint_pow2(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1320 | unsigned int cond, |
1321 | snd_pcm_hw_param_t var) | |
1322 | { | |
1323 | return snd_pcm_hw_rule_add(runtime, cond, var, | |
1324 | snd_pcm_hw_rule_pow2, NULL, | |
1325 | var, -1); | |
1326 | } | |
1327 | ||
e88e8ae6 TI |
1328 | EXPORT_SYMBOL(snd_pcm_hw_constraint_pow2); |
1329 | ||
877211f5 | 1330 | static void _snd_pcm_hw_param_any(struct snd_pcm_hw_params *params, |
123992f7 | 1331 | snd_pcm_hw_param_t var) |
1da177e4 LT |
1332 | { |
1333 | if (hw_is_mask(var)) { | |
1334 | snd_mask_any(hw_param_mask(params, var)); | |
1335 | params->cmask |= 1 << var; | |
1336 | params->rmask |= 1 << var; | |
1337 | return; | |
1338 | } | |
1339 | if (hw_is_interval(var)) { | |
1340 | snd_interval_any(hw_param_interval(params, var)); | |
1341 | params->cmask |= 1 << var; | |
1342 | params->rmask |= 1 << var; | |
1343 | return; | |
1344 | } | |
1345 | snd_BUG(); | |
1346 | } | |
1347 | ||
877211f5 | 1348 | void _snd_pcm_hw_params_any(struct snd_pcm_hw_params *params) |
1da177e4 LT |
1349 | { |
1350 | unsigned int k; | |
1351 | memset(params, 0, sizeof(*params)); | |
1352 | for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) | |
1353 | _snd_pcm_hw_param_any(params, k); | |
1354 | for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) | |
1355 | _snd_pcm_hw_param_any(params, k); | |
1356 | params->info = ~0U; | |
1357 | } | |
1358 | ||
e88e8ae6 | 1359 | EXPORT_SYMBOL(_snd_pcm_hw_params_any); |
1da177e4 LT |
1360 | |
1361 | /** | |
1c85cc64 | 1362 | * snd_pcm_hw_param_value - return @params field @var value |
df8db936 TI |
1363 | * @params: the hw_params instance |
1364 | * @var: parameter to retrieve | |
1c85cc64 | 1365 | * @dir: pointer to the direction (-1,0,1) or %NULL |
1da177e4 | 1366 | * |
1c85cc64 RD |
1367 | * Return the value for field @var if it's fixed in configuration space |
1368 | * defined by @params. Return -%EINVAL otherwise. | |
1da177e4 | 1369 | */ |
e88e8ae6 TI |
1370 | int snd_pcm_hw_param_value(const struct snd_pcm_hw_params *params, |
1371 | snd_pcm_hw_param_t var, int *dir) | |
1da177e4 LT |
1372 | { |
1373 | if (hw_is_mask(var)) { | |
877211f5 | 1374 | const struct snd_mask *mask = hw_param_mask_c(params, var); |
1da177e4 LT |
1375 | if (!snd_mask_single(mask)) |
1376 | return -EINVAL; | |
1377 | if (dir) | |
1378 | *dir = 0; | |
1379 | return snd_mask_value(mask); | |
1380 | } | |
1381 | if (hw_is_interval(var)) { | |
877211f5 | 1382 | const struct snd_interval *i = hw_param_interval_c(params, var); |
1da177e4 LT |
1383 | if (!snd_interval_single(i)) |
1384 | return -EINVAL; | |
1385 | if (dir) | |
1386 | *dir = i->openmin; | |
1387 | return snd_interval_value(i); | |
1388 | } | |
1da177e4 LT |
1389 | return -EINVAL; |
1390 | } | |
1391 | ||
e88e8ae6 | 1392 | EXPORT_SYMBOL(snd_pcm_hw_param_value); |
1da177e4 | 1393 | |
877211f5 | 1394 | void _snd_pcm_hw_param_setempty(struct snd_pcm_hw_params *params, |
1da177e4 LT |
1395 | snd_pcm_hw_param_t var) |
1396 | { | |
1397 | if (hw_is_mask(var)) { | |
1398 | snd_mask_none(hw_param_mask(params, var)); | |
1399 | params->cmask |= 1 << var; | |
1400 | params->rmask |= 1 << var; | |
1401 | } else if (hw_is_interval(var)) { | |
1402 | snd_interval_none(hw_param_interval(params, var)); | |
1403 | params->cmask |= 1 << var; | |
1404 | params->rmask |= 1 << var; | |
1405 | } else { | |
1406 | snd_BUG(); | |
1407 | } | |
1408 | } | |
1409 | ||
e88e8ae6 | 1410 | EXPORT_SYMBOL(_snd_pcm_hw_param_setempty); |
1da177e4 | 1411 | |
877211f5 | 1412 | static int _snd_pcm_hw_param_first(struct snd_pcm_hw_params *params, |
123992f7 | 1413 | snd_pcm_hw_param_t var) |
1da177e4 LT |
1414 | { |
1415 | int changed; | |
1416 | if (hw_is_mask(var)) | |
1417 | changed = snd_mask_refine_first(hw_param_mask(params, var)); | |
1418 | else if (hw_is_interval(var)) | |
1419 | changed = snd_interval_refine_first(hw_param_interval(params, var)); | |
2f4ca8e5 | 1420 | else |
1da177e4 | 1421 | return -EINVAL; |
1da177e4 LT |
1422 | if (changed) { |
1423 | params->cmask |= 1 << var; | |
1424 | params->rmask |= 1 << var; | |
1425 | } | |
1426 | return changed; | |
1427 | } | |
1428 | ||
1429 | ||
1430 | /** | |
1c85cc64 | 1431 | * snd_pcm_hw_param_first - refine config space and return minimum value |
df8db936 TI |
1432 | * @pcm: PCM instance |
1433 | * @params: the hw_params instance | |
1434 | * @var: parameter to retrieve | |
1c85cc64 | 1435 | * @dir: pointer to the direction (-1,0,1) or %NULL |
1da177e4 | 1436 | * |
1c85cc64 | 1437 | * Inside configuration space defined by @params remove from @var all |
1da177e4 LT |
1438 | * values > minimum. Reduce configuration space accordingly. |
1439 | * Return the minimum. | |
1440 | */ | |
e88e8ae6 TI |
1441 | int snd_pcm_hw_param_first(struct snd_pcm_substream *pcm, |
1442 | struct snd_pcm_hw_params *params, | |
1443 | snd_pcm_hw_param_t var, int *dir) | |
1da177e4 LT |
1444 | { |
1445 | int changed = _snd_pcm_hw_param_first(params, var); | |
1446 | if (changed < 0) | |
1447 | return changed; | |
1448 | if (params->rmask) { | |
1449 | int err = snd_pcm_hw_refine(pcm, params); | |
7eaa943c TI |
1450 | if (snd_BUG_ON(err < 0)) |
1451 | return err; | |
1da177e4 LT |
1452 | } |
1453 | return snd_pcm_hw_param_value(params, var, dir); | |
1454 | } | |
1455 | ||
e88e8ae6 TI |
1456 | EXPORT_SYMBOL(snd_pcm_hw_param_first); |
1457 | ||
877211f5 | 1458 | static int _snd_pcm_hw_param_last(struct snd_pcm_hw_params *params, |
123992f7 | 1459 | snd_pcm_hw_param_t var) |
1da177e4 LT |
1460 | { |
1461 | int changed; | |
1462 | if (hw_is_mask(var)) | |
1463 | changed = snd_mask_refine_last(hw_param_mask(params, var)); | |
1464 | else if (hw_is_interval(var)) | |
1465 | changed = snd_interval_refine_last(hw_param_interval(params, var)); | |
2f4ca8e5 | 1466 | else |
1da177e4 | 1467 | return -EINVAL; |
1da177e4 LT |
1468 | if (changed) { |
1469 | params->cmask |= 1 << var; | |
1470 | params->rmask |= 1 << var; | |
1471 | } | |
1472 | return changed; | |
1473 | } | |
1474 | ||
1475 | ||
1476 | /** | |
1c85cc64 | 1477 | * snd_pcm_hw_param_last - refine config space and return maximum value |
df8db936 TI |
1478 | * @pcm: PCM instance |
1479 | * @params: the hw_params instance | |
1480 | * @var: parameter to retrieve | |
1c85cc64 | 1481 | * @dir: pointer to the direction (-1,0,1) or %NULL |
1da177e4 | 1482 | * |
1c85cc64 | 1483 | * Inside configuration space defined by @params remove from @var all |
1da177e4 LT |
1484 | * values < maximum. Reduce configuration space accordingly. |
1485 | * Return the maximum. | |
1486 | */ | |
e88e8ae6 TI |
1487 | int snd_pcm_hw_param_last(struct snd_pcm_substream *pcm, |
1488 | struct snd_pcm_hw_params *params, | |
1489 | snd_pcm_hw_param_t var, int *dir) | |
1da177e4 LT |
1490 | { |
1491 | int changed = _snd_pcm_hw_param_last(params, var); | |
1492 | if (changed < 0) | |
1493 | return changed; | |
1494 | if (params->rmask) { | |
1495 | int err = snd_pcm_hw_refine(pcm, params); | |
7eaa943c TI |
1496 | if (snd_BUG_ON(err < 0)) |
1497 | return err; | |
1da177e4 LT |
1498 | } |
1499 | return snd_pcm_hw_param_value(params, var, dir); | |
1500 | } | |
1501 | ||
e88e8ae6 | 1502 | EXPORT_SYMBOL(snd_pcm_hw_param_last); |
1da177e4 LT |
1503 | |
1504 | /** | |
1c85cc64 | 1505 | * snd_pcm_hw_param_choose - choose a configuration defined by @params |
df8db936 TI |
1506 | * @pcm: PCM instance |
1507 | * @params: the hw_params instance | |
1da177e4 | 1508 | * |
1c85cc64 | 1509 | * Choose one configuration from configuration space defined by @params. |
1da177e4 LT |
1510 | * The configuration chosen is that obtained fixing in this order: |
1511 | * first access, first format, first subformat, min channels, | |
1512 | * min rate, min period time, max buffer size, min tick time | |
1513 | */ | |
2f4ca8e5 TI |
1514 | int snd_pcm_hw_params_choose(struct snd_pcm_substream *pcm, |
1515 | struct snd_pcm_hw_params *params) | |
1da177e4 | 1516 | { |
2f4ca8e5 TI |
1517 | static int vars[] = { |
1518 | SNDRV_PCM_HW_PARAM_ACCESS, | |
1519 | SNDRV_PCM_HW_PARAM_FORMAT, | |
1520 | SNDRV_PCM_HW_PARAM_SUBFORMAT, | |
1521 | SNDRV_PCM_HW_PARAM_CHANNELS, | |
1522 | SNDRV_PCM_HW_PARAM_RATE, | |
1523 | SNDRV_PCM_HW_PARAM_PERIOD_TIME, | |
1524 | SNDRV_PCM_HW_PARAM_BUFFER_SIZE, | |
1525 | SNDRV_PCM_HW_PARAM_TICK_TIME, | |
1526 | -1 | |
1527 | }; | |
1528 | int err, *v; | |
1da177e4 | 1529 | |
2f4ca8e5 TI |
1530 | for (v = vars; *v != -1; v++) { |
1531 | if (*v != SNDRV_PCM_HW_PARAM_BUFFER_SIZE) | |
1532 | err = snd_pcm_hw_param_first(pcm, params, *v, NULL); | |
1533 | else | |
1534 | err = snd_pcm_hw_param_last(pcm, params, *v, NULL); | |
7eaa943c TI |
1535 | if (snd_BUG_ON(err < 0)) |
1536 | return err; | |
2f4ca8e5 | 1537 | } |
1da177e4 LT |
1538 | return 0; |
1539 | } | |
1540 | ||
877211f5 | 1541 | static int snd_pcm_lib_ioctl_reset(struct snd_pcm_substream *substream, |
1da177e4 LT |
1542 | void *arg) |
1543 | { | |
877211f5 | 1544 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1545 | unsigned long flags; |
1546 | snd_pcm_stream_lock_irqsave(substream, flags); | |
1547 | if (snd_pcm_running(substream) && | |
1548 | snd_pcm_update_hw_ptr(substream) >= 0) | |
1549 | runtime->status->hw_ptr %= runtime->buffer_size; | |
1550 | else | |
1551 | runtime->status->hw_ptr = 0; | |
1552 | snd_pcm_stream_unlock_irqrestore(substream, flags); | |
1553 | return 0; | |
1554 | } | |
1555 | ||
877211f5 | 1556 | static int snd_pcm_lib_ioctl_channel_info(struct snd_pcm_substream *substream, |
1da177e4 LT |
1557 | void *arg) |
1558 | { | |
877211f5 TI |
1559 | struct snd_pcm_channel_info *info = arg; |
1560 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1da177e4 LT |
1561 | int width; |
1562 | if (!(runtime->info & SNDRV_PCM_INFO_MMAP)) { | |
1563 | info->offset = -1; | |
1564 | return 0; | |
1565 | } | |
1566 | width = snd_pcm_format_physical_width(runtime->format); | |
1567 | if (width < 0) | |
1568 | return width; | |
1569 | info->offset = 0; | |
1570 | switch (runtime->access) { | |
1571 | case SNDRV_PCM_ACCESS_MMAP_INTERLEAVED: | |
1572 | case SNDRV_PCM_ACCESS_RW_INTERLEAVED: | |
1573 | info->first = info->channel * width; | |
1574 | info->step = runtime->channels * width; | |
1575 | break; | |
1576 | case SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED: | |
1577 | case SNDRV_PCM_ACCESS_RW_NONINTERLEAVED: | |
1578 | { | |
1579 | size_t size = runtime->dma_bytes / runtime->channels; | |
1580 | info->first = info->channel * size * 8; | |
1581 | info->step = width; | |
1582 | break; | |
1583 | } | |
1584 | default: | |
1585 | snd_BUG(); | |
1586 | break; | |
1587 | } | |
1588 | return 0; | |
1589 | } | |
1590 | ||
8bea869c JK |
1591 | static int snd_pcm_lib_ioctl_fifo_size(struct snd_pcm_substream *substream, |
1592 | void *arg) | |
1593 | { | |
1594 | struct snd_pcm_hw_params *params = arg; | |
1595 | snd_pcm_format_t format; | |
1596 | int channels, width; | |
1597 | ||
1598 | params->fifo_size = substream->runtime->hw.fifo_size; | |
1599 | if (!(substream->runtime->hw.info & SNDRV_PCM_INFO_FIFO_IN_FRAMES)) { | |
1600 | format = params_format(params); | |
1601 | channels = params_channels(params); | |
1602 | width = snd_pcm_format_physical_width(format); | |
1603 | params->fifo_size /= width * channels; | |
1604 | } | |
1605 | return 0; | |
1606 | } | |
1607 | ||
1da177e4 LT |
1608 | /** |
1609 | * snd_pcm_lib_ioctl - a generic PCM ioctl callback | |
1610 | * @substream: the pcm substream instance | |
1611 | * @cmd: ioctl command | |
1612 | * @arg: ioctl argument | |
1613 | * | |
1614 | * Processes the generic ioctl commands for PCM. | |
1615 | * Can be passed as the ioctl callback for PCM ops. | |
1616 | * | |
1617 | * Returns zero if successful, or a negative error code on failure. | |
1618 | */ | |
877211f5 | 1619 | int snd_pcm_lib_ioctl(struct snd_pcm_substream *substream, |
1da177e4 LT |
1620 | unsigned int cmd, void *arg) |
1621 | { | |
1622 | switch (cmd) { | |
1623 | case SNDRV_PCM_IOCTL1_INFO: | |
1624 | return 0; | |
1625 | case SNDRV_PCM_IOCTL1_RESET: | |
1626 | return snd_pcm_lib_ioctl_reset(substream, arg); | |
1627 | case SNDRV_PCM_IOCTL1_CHANNEL_INFO: | |
1628 | return snd_pcm_lib_ioctl_channel_info(substream, arg); | |
8bea869c JK |
1629 | case SNDRV_PCM_IOCTL1_FIFO_SIZE: |
1630 | return snd_pcm_lib_ioctl_fifo_size(substream, arg); | |
1da177e4 LT |
1631 | } |
1632 | return -ENXIO; | |
1633 | } | |
1634 | ||
e88e8ae6 TI |
1635 | EXPORT_SYMBOL(snd_pcm_lib_ioctl); |
1636 | ||
1da177e4 LT |
1637 | /** |
1638 | * snd_pcm_period_elapsed - update the pcm status for the next period | |
1639 | * @substream: the pcm substream instance | |
1640 | * | |
1641 | * This function is called from the interrupt handler when the | |
1642 | * PCM has processed the period size. It will update the current | |
31e8960b | 1643 | * pointer, wake up sleepers, etc. |
1da177e4 LT |
1644 | * |
1645 | * Even if more than one periods have elapsed since the last call, you | |
1646 | * have to call this only once. | |
1647 | */ | |
877211f5 | 1648 | void snd_pcm_period_elapsed(struct snd_pcm_substream *substream) |
1da177e4 | 1649 | { |
877211f5 | 1650 | struct snd_pcm_runtime *runtime; |
1da177e4 LT |
1651 | unsigned long flags; |
1652 | ||
7eaa943c TI |
1653 | if (PCM_RUNTIME_CHECK(substream)) |
1654 | return; | |
1da177e4 | 1655 | runtime = substream->runtime; |
1da177e4 LT |
1656 | |
1657 | if (runtime->transfer_ack_begin) | |
1658 | runtime->transfer_ack_begin(substream); | |
1659 | ||
1660 | snd_pcm_stream_lock_irqsave(substream, flags); | |
1661 | if (!snd_pcm_running(substream) || | |
f240406b | 1662 | snd_pcm_update_hw_ptr0(substream, 1) < 0) |
1da177e4 LT |
1663 | goto _end; |
1664 | ||
1665 | if (substream->timer_running) | |
1666 | snd_timer_interrupt(substream->timer, 1); | |
1da177e4 LT |
1667 | _end: |
1668 | snd_pcm_stream_unlock_irqrestore(substream, flags); | |
1669 | if (runtime->transfer_ack_end) | |
1670 | runtime->transfer_ack_end(substream); | |
1671 | kill_fasync(&runtime->fasync, SIGIO, POLL_IN); | |
1672 | } | |
1673 | ||
e88e8ae6 TI |
1674 | EXPORT_SYMBOL(snd_pcm_period_elapsed); |
1675 | ||
13075510 TI |
1676 | /* |
1677 | * Wait until avail_min data becomes available | |
1678 | * Returns a negative error code if any error occurs during operation. | |
1679 | * The available space is stored on availp. When err = 0 and avail = 0 | |
1680 | * on the capture stream, it indicates the stream is in DRAINING state. | |
1681 | */ | |
1682 | static int wait_for_avail_min(struct snd_pcm_substream *substream, | |
1683 | snd_pcm_uframes_t *availp) | |
1684 | { | |
1685 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1686 | int is_playback = substream->stream == SNDRV_PCM_STREAM_PLAYBACK; | |
1687 | wait_queue_t wait; | |
1688 | int err = 0; | |
1689 | snd_pcm_uframes_t avail = 0; | |
1690 | long tout; | |
1691 | ||
1692 | init_waitqueue_entry(&wait, current); | |
1693 | add_wait_queue(&runtime->sleep, &wait); | |
1694 | for (;;) { | |
1695 | if (signal_pending(current)) { | |
1696 | err = -ERESTARTSYS; | |
1697 | break; | |
1698 | } | |
1699 | set_current_state(TASK_INTERRUPTIBLE); | |
1700 | snd_pcm_stream_unlock_irq(substream); | |
1701 | tout = schedule_timeout(msecs_to_jiffies(10000)); | |
1702 | snd_pcm_stream_lock_irq(substream); | |
1703 | switch (runtime->status->state) { | |
1704 | case SNDRV_PCM_STATE_SUSPENDED: | |
1705 | err = -ESTRPIPE; | |
1706 | goto _endloop; | |
1707 | case SNDRV_PCM_STATE_XRUN: | |
1708 | err = -EPIPE; | |
1709 | goto _endloop; | |
1710 | case SNDRV_PCM_STATE_DRAINING: | |
1711 | if (is_playback) | |
1712 | err = -EPIPE; | |
1713 | else | |
1714 | avail = 0; /* indicate draining */ | |
1715 | goto _endloop; | |
1716 | case SNDRV_PCM_STATE_OPEN: | |
1717 | case SNDRV_PCM_STATE_SETUP: | |
1718 | case SNDRV_PCM_STATE_DISCONNECTED: | |
1719 | err = -EBADFD; | |
1720 | goto _endloop; | |
1721 | } | |
1722 | if (!tout) { | |
1723 | snd_printd("%s write error (DMA or IRQ trouble?)\n", | |
1724 | is_playback ? "playback" : "capture"); | |
1725 | err = -EIO; | |
1726 | break; | |
1727 | } | |
1728 | if (is_playback) | |
1729 | avail = snd_pcm_playback_avail(runtime); | |
1730 | else | |
1731 | avail = snd_pcm_capture_avail(runtime); | |
1732 | if (avail >= runtime->control->avail_min) | |
1733 | break; | |
1734 | } | |
1735 | _endloop: | |
1736 | remove_wait_queue(&runtime->sleep, &wait); | |
1737 | *availp = avail; | |
1738 | return err; | |
1739 | } | |
1740 | ||
877211f5 | 1741 | static int snd_pcm_lib_write_transfer(struct snd_pcm_substream *substream, |
1da177e4 LT |
1742 | unsigned int hwoff, |
1743 | unsigned long data, unsigned int off, | |
1744 | snd_pcm_uframes_t frames) | |
1745 | { | |
877211f5 | 1746 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1747 | int err; |
1748 | char __user *buf = (char __user *) data + frames_to_bytes(runtime, off); | |
1749 | if (substream->ops->copy) { | |
1750 | if ((err = substream->ops->copy(substream, -1, hwoff, buf, frames)) < 0) | |
1751 | return err; | |
1752 | } else { | |
1753 | char *hwbuf = runtime->dma_area + frames_to_bytes(runtime, hwoff); | |
1da177e4 LT |
1754 | if (copy_from_user(hwbuf, buf, frames_to_bytes(runtime, frames))) |
1755 | return -EFAULT; | |
1756 | } | |
1757 | return 0; | |
1758 | } | |
1759 | ||
877211f5 | 1760 | typedef int (*transfer_f)(struct snd_pcm_substream *substream, unsigned int hwoff, |
1da177e4 LT |
1761 | unsigned long data, unsigned int off, |
1762 | snd_pcm_uframes_t size); | |
1763 | ||
877211f5 | 1764 | static snd_pcm_sframes_t snd_pcm_lib_write1(struct snd_pcm_substream *substream, |
1da177e4 LT |
1765 | unsigned long data, |
1766 | snd_pcm_uframes_t size, | |
1767 | int nonblock, | |
1768 | transfer_f transfer) | |
1769 | { | |
877211f5 | 1770 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1771 | snd_pcm_uframes_t xfer = 0; |
1772 | snd_pcm_uframes_t offset = 0; | |
1773 | int err = 0; | |
1774 | ||
1775 | if (size == 0) | |
1776 | return 0; | |
1da177e4 LT |
1777 | |
1778 | snd_pcm_stream_lock_irq(substream); | |
1779 | switch (runtime->status->state) { | |
1780 | case SNDRV_PCM_STATE_PREPARED: | |
1781 | case SNDRV_PCM_STATE_RUNNING: | |
1782 | case SNDRV_PCM_STATE_PAUSED: | |
1783 | break; | |
1784 | case SNDRV_PCM_STATE_XRUN: | |
1785 | err = -EPIPE; | |
1786 | goto _end_unlock; | |
1787 | case SNDRV_PCM_STATE_SUSPENDED: | |
1788 | err = -ESTRPIPE; | |
1789 | goto _end_unlock; | |
1790 | default: | |
1791 | err = -EBADFD; | |
1792 | goto _end_unlock; | |
1793 | } | |
1794 | ||
1795 | while (size > 0) { | |
1796 | snd_pcm_uframes_t frames, appl_ptr, appl_ofs; | |
1797 | snd_pcm_uframes_t avail; | |
1798 | snd_pcm_uframes_t cont; | |
31e8960b | 1799 | if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) |
1da177e4 LT |
1800 | snd_pcm_update_hw_ptr(substream); |
1801 | avail = snd_pcm_playback_avail(runtime); | |
13075510 | 1802 | if (!avail) { |
1da177e4 LT |
1803 | if (nonblock) { |
1804 | err = -EAGAIN; | |
1805 | goto _end_unlock; | |
1806 | } | |
13075510 TI |
1807 | err = wait_for_avail_min(substream, &avail); |
1808 | if (err < 0) | |
443feb88 | 1809 | goto _end_unlock; |
1da177e4 | 1810 | } |
1da177e4 LT |
1811 | frames = size > avail ? avail : size; |
1812 | cont = runtime->buffer_size - runtime->control->appl_ptr % runtime->buffer_size; | |
1813 | if (frames > cont) | |
1814 | frames = cont; | |
7eaa943c TI |
1815 | if (snd_BUG_ON(!frames)) { |
1816 | snd_pcm_stream_unlock_irq(substream); | |
1817 | return -EINVAL; | |
1818 | } | |
1da177e4 LT |
1819 | appl_ptr = runtime->control->appl_ptr; |
1820 | appl_ofs = appl_ptr % runtime->buffer_size; | |
1821 | snd_pcm_stream_unlock_irq(substream); | |
1822 | if ((err = transfer(substream, appl_ofs, data, offset, frames)) < 0) | |
1823 | goto _end; | |
1824 | snd_pcm_stream_lock_irq(substream); | |
1825 | switch (runtime->status->state) { | |
1826 | case SNDRV_PCM_STATE_XRUN: | |
1827 | err = -EPIPE; | |
1828 | goto _end_unlock; | |
1829 | case SNDRV_PCM_STATE_SUSPENDED: | |
1830 | err = -ESTRPIPE; | |
1831 | goto _end_unlock; | |
1832 | default: | |
1833 | break; | |
1834 | } | |
1835 | appl_ptr += frames; | |
1836 | if (appl_ptr >= runtime->boundary) | |
1837 | appl_ptr -= runtime->boundary; | |
1838 | runtime->control->appl_ptr = appl_ptr; | |
1839 | if (substream->ops->ack) | |
1840 | substream->ops->ack(substream); | |
1841 | ||
1842 | offset += frames; | |
1843 | size -= frames; | |
1844 | xfer += frames; | |
1845 | if (runtime->status->state == SNDRV_PCM_STATE_PREPARED && | |
1846 | snd_pcm_playback_hw_avail(runtime) >= (snd_pcm_sframes_t)runtime->start_threshold) { | |
1847 | err = snd_pcm_start(substream); | |
1848 | if (err < 0) | |
1849 | goto _end_unlock; | |
1850 | } | |
1da177e4 LT |
1851 | } |
1852 | _end_unlock: | |
1853 | snd_pcm_stream_unlock_irq(substream); | |
1854 | _end: | |
1855 | return xfer > 0 ? (snd_pcm_sframes_t)xfer : err; | |
1856 | } | |
1857 | ||
7eaa943c TI |
1858 | /* sanity-check for read/write methods */ |
1859 | static int pcm_sanity_check(struct snd_pcm_substream *substream) | |
1da177e4 | 1860 | { |
877211f5 | 1861 | struct snd_pcm_runtime *runtime; |
7eaa943c TI |
1862 | if (PCM_RUNTIME_CHECK(substream)) |
1863 | return -ENXIO; | |
1da177e4 | 1864 | runtime = substream->runtime; |
7eaa943c TI |
1865 | if (snd_BUG_ON(!substream->ops->copy && !runtime->dma_area)) |
1866 | return -EINVAL; | |
1da177e4 LT |
1867 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) |
1868 | return -EBADFD; | |
7eaa943c TI |
1869 | return 0; |
1870 | } | |
1871 | ||
1872 | snd_pcm_sframes_t snd_pcm_lib_write(struct snd_pcm_substream *substream, const void __user *buf, snd_pcm_uframes_t size) | |
1873 | { | |
1874 | struct snd_pcm_runtime *runtime; | |
1875 | int nonblock; | |
1876 | int err; | |
1da177e4 | 1877 | |
7eaa943c TI |
1878 | err = pcm_sanity_check(substream); |
1879 | if (err < 0) | |
1880 | return err; | |
1881 | runtime = substream->runtime; | |
0df63e44 | 1882 | nonblock = !!(substream->f_flags & O_NONBLOCK); |
1da177e4 LT |
1883 | |
1884 | if (runtime->access != SNDRV_PCM_ACCESS_RW_INTERLEAVED && | |
1885 | runtime->channels > 1) | |
1886 | return -EINVAL; | |
1887 | return snd_pcm_lib_write1(substream, (unsigned long)buf, size, nonblock, | |
1888 | snd_pcm_lib_write_transfer); | |
1889 | } | |
1890 | ||
e88e8ae6 TI |
1891 | EXPORT_SYMBOL(snd_pcm_lib_write); |
1892 | ||
877211f5 | 1893 | static int snd_pcm_lib_writev_transfer(struct snd_pcm_substream *substream, |
1da177e4 LT |
1894 | unsigned int hwoff, |
1895 | unsigned long data, unsigned int off, | |
1896 | snd_pcm_uframes_t frames) | |
1897 | { | |
877211f5 | 1898 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1899 | int err; |
1900 | void __user **bufs = (void __user **)data; | |
1901 | int channels = runtime->channels; | |
1902 | int c; | |
1903 | if (substream->ops->copy) { | |
7eaa943c TI |
1904 | if (snd_BUG_ON(!substream->ops->silence)) |
1905 | return -EINVAL; | |
1da177e4 LT |
1906 | for (c = 0; c < channels; ++c, ++bufs) { |
1907 | if (*bufs == NULL) { | |
1908 | if ((err = substream->ops->silence(substream, c, hwoff, frames)) < 0) | |
1909 | return err; | |
1910 | } else { | |
1911 | char __user *buf = *bufs + samples_to_bytes(runtime, off); | |
1912 | if ((err = substream->ops->copy(substream, c, hwoff, buf, frames)) < 0) | |
1913 | return err; | |
1914 | } | |
1915 | } | |
1916 | } else { | |
1917 | /* default transfer behaviour */ | |
1918 | size_t dma_csize = runtime->dma_bytes / channels; | |
1da177e4 LT |
1919 | for (c = 0; c < channels; ++c, ++bufs) { |
1920 | char *hwbuf = runtime->dma_area + (c * dma_csize) + samples_to_bytes(runtime, hwoff); | |
1921 | if (*bufs == NULL) { | |
1922 | snd_pcm_format_set_silence(runtime->format, hwbuf, frames); | |
1923 | } else { | |
1924 | char __user *buf = *bufs + samples_to_bytes(runtime, off); | |
1925 | if (copy_from_user(hwbuf, buf, samples_to_bytes(runtime, frames))) | |
1926 | return -EFAULT; | |
1927 | } | |
1928 | } | |
1929 | } | |
1930 | return 0; | |
1931 | } | |
1932 | ||
877211f5 | 1933 | snd_pcm_sframes_t snd_pcm_lib_writev(struct snd_pcm_substream *substream, |
1da177e4 LT |
1934 | void __user **bufs, |
1935 | snd_pcm_uframes_t frames) | |
1936 | { | |
877211f5 | 1937 | struct snd_pcm_runtime *runtime; |
1da177e4 | 1938 | int nonblock; |
7eaa943c | 1939 | int err; |
1da177e4 | 1940 | |
7eaa943c TI |
1941 | err = pcm_sanity_check(substream); |
1942 | if (err < 0) | |
1943 | return err; | |
1da177e4 | 1944 | runtime = substream->runtime; |
0df63e44 | 1945 | nonblock = !!(substream->f_flags & O_NONBLOCK); |
1da177e4 LT |
1946 | |
1947 | if (runtime->access != SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) | |
1948 | return -EINVAL; | |
1949 | return snd_pcm_lib_write1(substream, (unsigned long)bufs, frames, | |
1950 | nonblock, snd_pcm_lib_writev_transfer); | |
1951 | } | |
1952 | ||
e88e8ae6 TI |
1953 | EXPORT_SYMBOL(snd_pcm_lib_writev); |
1954 | ||
877211f5 | 1955 | static int snd_pcm_lib_read_transfer(struct snd_pcm_substream *substream, |
1da177e4 LT |
1956 | unsigned int hwoff, |
1957 | unsigned long data, unsigned int off, | |
1958 | snd_pcm_uframes_t frames) | |
1959 | { | |
877211f5 | 1960 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1961 | int err; |
1962 | char __user *buf = (char __user *) data + frames_to_bytes(runtime, off); | |
1963 | if (substream->ops->copy) { | |
1964 | if ((err = substream->ops->copy(substream, -1, hwoff, buf, frames)) < 0) | |
1965 | return err; | |
1966 | } else { | |
1967 | char *hwbuf = runtime->dma_area + frames_to_bytes(runtime, hwoff); | |
1da177e4 LT |
1968 | if (copy_to_user(buf, hwbuf, frames_to_bytes(runtime, frames))) |
1969 | return -EFAULT; | |
1970 | } | |
1971 | return 0; | |
1972 | } | |
1973 | ||
877211f5 | 1974 | static snd_pcm_sframes_t snd_pcm_lib_read1(struct snd_pcm_substream *substream, |
1da177e4 LT |
1975 | unsigned long data, |
1976 | snd_pcm_uframes_t size, | |
1977 | int nonblock, | |
1978 | transfer_f transfer) | |
1979 | { | |
877211f5 | 1980 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1981 | snd_pcm_uframes_t xfer = 0; |
1982 | snd_pcm_uframes_t offset = 0; | |
1983 | int err = 0; | |
1984 | ||
1985 | if (size == 0) | |
1986 | return 0; | |
1da177e4 LT |
1987 | |
1988 | snd_pcm_stream_lock_irq(substream); | |
1989 | switch (runtime->status->state) { | |
1990 | case SNDRV_PCM_STATE_PREPARED: | |
1991 | if (size >= runtime->start_threshold) { | |
1992 | err = snd_pcm_start(substream); | |
1993 | if (err < 0) | |
1994 | goto _end_unlock; | |
1995 | } | |
1996 | break; | |
1997 | case SNDRV_PCM_STATE_DRAINING: | |
1998 | case SNDRV_PCM_STATE_RUNNING: | |
1999 | case SNDRV_PCM_STATE_PAUSED: | |
2000 | break; | |
2001 | case SNDRV_PCM_STATE_XRUN: | |
2002 | err = -EPIPE; | |
2003 | goto _end_unlock; | |
2004 | case SNDRV_PCM_STATE_SUSPENDED: | |
2005 | err = -ESTRPIPE; | |
2006 | goto _end_unlock; | |
2007 | default: | |
2008 | err = -EBADFD; | |
2009 | goto _end_unlock; | |
2010 | } | |
2011 | ||
2012 | while (size > 0) { | |
2013 | snd_pcm_uframes_t frames, appl_ptr, appl_ofs; | |
2014 | snd_pcm_uframes_t avail; | |
2015 | snd_pcm_uframes_t cont; | |
31e8960b | 2016 | if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) |
1da177e4 | 2017 | snd_pcm_update_hw_ptr(substream); |
1da177e4 | 2018 | avail = snd_pcm_capture_avail(runtime); |
13075510 TI |
2019 | if (!avail) { |
2020 | if (runtime->status->state == | |
2021 | SNDRV_PCM_STATE_DRAINING) { | |
2022 | snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP); | |
1da177e4 LT |
2023 | goto _end_unlock; |
2024 | } | |
1da177e4 LT |
2025 | if (nonblock) { |
2026 | err = -EAGAIN; | |
2027 | goto _end_unlock; | |
2028 | } | |
13075510 TI |
2029 | err = wait_for_avail_min(substream, &avail); |
2030 | if (err < 0) | |
443feb88 | 2031 | goto _end_unlock; |
13075510 TI |
2032 | if (!avail) |
2033 | continue; /* draining */ | |
1da177e4 | 2034 | } |
1da177e4 LT |
2035 | frames = size > avail ? avail : size; |
2036 | cont = runtime->buffer_size - runtime->control->appl_ptr % runtime->buffer_size; | |
2037 | if (frames > cont) | |
2038 | frames = cont; | |
7eaa943c TI |
2039 | if (snd_BUG_ON(!frames)) { |
2040 | snd_pcm_stream_unlock_irq(substream); | |
2041 | return -EINVAL; | |
2042 | } | |
1da177e4 LT |
2043 | appl_ptr = runtime->control->appl_ptr; |
2044 | appl_ofs = appl_ptr % runtime->buffer_size; | |
2045 | snd_pcm_stream_unlock_irq(substream); | |
2046 | if ((err = transfer(substream, appl_ofs, data, offset, frames)) < 0) | |
2047 | goto _end; | |
2048 | snd_pcm_stream_lock_irq(substream); | |
2049 | switch (runtime->status->state) { | |
2050 | case SNDRV_PCM_STATE_XRUN: | |
2051 | err = -EPIPE; | |
2052 | goto _end_unlock; | |
2053 | case SNDRV_PCM_STATE_SUSPENDED: | |
2054 | err = -ESTRPIPE; | |
2055 | goto _end_unlock; | |
2056 | default: | |
2057 | break; | |
2058 | } | |
2059 | appl_ptr += frames; | |
2060 | if (appl_ptr >= runtime->boundary) | |
2061 | appl_ptr -= runtime->boundary; | |
2062 | runtime->control->appl_ptr = appl_ptr; | |
2063 | if (substream->ops->ack) | |
2064 | substream->ops->ack(substream); | |
2065 | ||
2066 | offset += frames; | |
2067 | size -= frames; | |
2068 | xfer += frames; | |
1da177e4 LT |
2069 | } |
2070 | _end_unlock: | |
2071 | snd_pcm_stream_unlock_irq(substream); | |
2072 | _end: | |
2073 | return xfer > 0 ? (snd_pcm_sframes_t)xfer : err; | |
2074 | } | |
2075 | ||
877211f5 | 2076 | snd_pcm_sframes_t snd_pcm_lib_read(struct snd_pcm_substream *substream, void __user *buf, snd_pcm_uframes_t size) |
1da177e4 | 2077 | { |
877211f5 | 2078 | struct snd_pcm_runtime *runtime; |
1da177e4 | 2079 | int nonblock; |
7eaa943c | 2080 | int err; |
1da177e4 | 2081 | |
7eaa943c TI |
2082 | err = pcm_sanity_check(substream); |
2083 | if (err < 0) | |
2084 | return err; | |
1da177e4 | 2085 | runtime = substream->runtime; |
0df63e44 | 2086 | nonblock = !!(substream->f_flags & O_NONBLOCK); |
1da177e4 LT |
2087 | if (runtime->access != SNDRV_PCM_ACCESS_RW_INTERLEAVED) |
2088 | return -EINVAL; | |
2089 | return snd_pcm_lib_read1(substream, (unsigned long)buf, size, nonblock, snd_pcm_lib_read_transfer); | |
2090 | } | |
2091 | ||
e88e8ae6 TI |
2092 | EXPORT_SYMBOL(snd_pcm_lib_read); |
2093 | ||
877211f5 | 2094 | static int snd_pcm_lib_readv_transfer(struct snd_pcm_substream *substream, |
1da177e4 LT |
2095 | unsigned int hwoff, |
2096 | unsigned long data, unsigned int off, | |
2097 | snd_pcm_uframes_t frames) | |
2098 | { | |
877211f5 | 2099 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
2100 | int err; |
2101 | void __user **bufs = (void __user **)data; | |
2102 | int channels = runtime->channels; | |
2103 | int c; | |
2104 | if (substream->ops->copy) { | |
2105 | for (c = 0; c < channels; ++c, ++bufs) { | |
2106 | char __user *buf; | |
2107 | if (*bufs == NULL) | |
2108 | continue; | |
2109 | buf = *bufs + samples_to_bytes(runtime, off); | |
2110 | if ((err = substream->ops->copy(substream, c, hwoff, buf, frames)) < 0) | |
2111 | return err; | |
2112 | } | |
2113 | } else { | |
2114 | snd_pcm_uframes_t dma_csize = runtime->dma_bytes / channels; | |
1da177e4 LT |
2115 | for (c = 0; c < channels; ++c, ++bufs) { |
2116 | char *hwbuf; | |
2117 | char __user *buf; | |
2118 | if (*bufs == NULL) | |
2119 | continue; | |
2120 | ||
2121 | hwbuf = runtime->dma_area + (c * dma_csize) + samples_to_bytes(runtime, hwoff); | |
2122 | buf = *bufs + samples_to_bytes(runtime, off); | |
2123 | if (copy_to_user(buf, hwbuf, samples_to_bytes(runtime, frames))) | |
2124 | return -EFAULT; | |
2125 | } | |
2126 | } | |
2127 | return 0; | |
2128 | } | |
2129 | ||
877211f5 | 2130 | snd_pcm_sframes_t snd_pcm_lib_readv(struct snd_pcm_substream *substream, |
1da177e4 LT |
2131 | void __user **bufs, |
2132 | snd_pcm_uframes_t frames) | |
2133 | { | |
877211f5 | 2134 | struct snd_pcm_runtime *runtime; |
1da177e4 | 2135 | int nonblock; |
7eaa943c | 2136 | int err; |
1da177e4 | 2137 | |
7eaa943c TI |
2138 | err = pcm_sanity_check(substream); |
2139 | if (err < 0) | |
2140 | return err; | |
1da177e4 | 2141 | runtime = substream->runtime; |
1da177e4 LT |
2142 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) |
2143 | return -EBADFD; | |
2144 | ||
0df63e44 | 2145 | nonblock = !!(substream->f_flags & O_NONBLOCK); |
1da177e4 LT |
2146 | if (runtime->access != SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) |
2147 | return -EINVAL; | |
2148 | return snd_pcm_lib_read1(substream, (unsigned long)bufs, frames, nonblock, snd_pcm_lib_readv_transfer); | |
2149 | } | |
2150 | ||
1da177e4 | 2151 | EXPORT_SYMBOL(snd_pcm_lib_readv); |