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 | ||
ed3da3d9 | 129 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
c62a01ad | 130 | #define xrun_debug(substream, mask) ((substream)->pstr->xrun_debug & (mask)) |
ed3da3d9 | 131 | #else |
c62a01ad | 132 | #define xrun_debug(substream, mask) 0 |
ed3da3d9 TI |
133 | #endif |
134 | ||
c62a01ad JK |
135 | #define dump_stack_on_xrun(substream) do { \ |
136 | if (xrun_debug(substream, 2)) \ | |
137 | dump_stack(); \ | |
ed3da3d9 TI |
138 | } while (0) |
139 | ||
c0070110 TI |
140 | static void pcm_debug_name(struct snd_pcm_substream *substream, |
141 | char *name, size_t len) | |
142 | { | |
143 | snprintf(name, len, "pcmC%dD%d%c:%d", | |
144 | substream->pcm->card->number, | |
145 | substream->pcm->device, | |
146 | substream->stream ? 'c' : 'p', | |
147 | substream->number); | |
148 | } | |
149 | ||
877211f5 | 150 | static void xrun(struct snd_pcm_substream *substream) |
1da177e4 | 151 | { |
13f040f9 JK |
152 | struct snd_pcm_runtime *runtime = substream->runtime; |
153 | ||
154 | if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) | |
155 | snd_pcm_gettime(runtime, (struct timespec *)&runtime->status->tstamp); | |
1da177e4 | 156 | snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN); |
c62a01ad | 157 | if (xrun_debug(substream, 1)) { |
c0070110 TI |
158 | char name[16]; |
159 | pcm_debug_name(substream, name, sizeof(name)); | |
160 | snd_printd(KERN_DEBUG "XRUN: %s\n", name); | |
ed3da3d9 | 161 | dump_stack_on_xrun(substream); |
1da177e4 | 162 | } |
1da177e4 LT |
163 | } |
164 | ||
98204646 TI |
165 | static snd_pcm_uframes_t |
166 | snd_pcm_update_hw_ptr_pos(struct snd_pcm_substream *substream, | |
167 | struct snd_pcm_runtime *runtime) | |
1da177e4 LT |
168 | { |
169 | snd_pcm_uframes_t pos; | |
170 | ||
171 | pos = substream->ops->pointer(substream); | |
172 | if (pos == SNDRV_PCM_POS_XRUN) | |
173 | return pos; /* XRUN */ | |
1da177e4 | 174 | if (pos >= runtime->buffer_size) { |
5f513e11 | 175 | if (printk_ratelimit()) { |
c0070110 TI |
176 | char name[16]; |
177 | pcm_debug_name(substream, name, sizeof(name)); | |
178 | snd_printd(KERN_ERR "BUG: %s, pos = 0x%lx, " | |
5f513e11 | 179 | "buffer size = 0x%lx, period size = 0x%lx\n", |
c0070110 | 180 | name, pos, runtime->buffer_size, |
5f513e11 TI |
181 | runtime->period_size); |
182 | } | |
183 | pos = 0; | |
7c22f1aa | 184 | } |
1da177e4 LT |
185 | pos -= pos % runtime->min_align; |
186 | return pos; | |
187 | } | |
188 | ||
98204646 TI |
189 | static int snd_pcm_update_hw_ptr_post(struct snd_pcm_substream *substream, |
190 | struct snd_pcm_runtime *runtime) | |
1da177e4 LT |
191 | { |
192 | snd_pcm_uframes_t avail; | |
193 | ||
194 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) | |
195 | avail = snd_pcm_playback_avail(runtime); | |
196 | else | |
197 | avail = snd_pcm_capture_avail(runtime); | |
198 | if (avail > runtime->avail_max) | |
199 | runtime->avail_max = avail; | |
200 | if (avail >= runtime->stop_threshold) { | |
201 | if (substream->runtime->status->state == SNDRV_PCM_STATE_DRAINING) | |
202 | snd_pcm_drain_done(substream); | |
203 | else | |
204 | xrun(substream); | |
205 | return -EPIPE; | |
206 | } | |
207 | if (avail >= runtime->control->avail_min) | |
208 | wake_up(&runtime->sleep); | |
209 | return 0; | |
210 | } | |
211 | ||
ed3da3d9 TI |
212 | #define hw_ptr_error(substream, fmt, args...) \ |
213 | do { \ | |
c62a01ad | 214 | if (xrun_debug(substream, 1)) { \ |
ed3da3d9 | 215 | if (printk_ratelimit()) { \ |
cad377ac | 216 | snd_printd("PCM: " fmt, ##args); \ |
ed3da3d9 TI |
217 | } \ |
218 | dump_stack_on_xrun(substream); \ | |
219 | } \ | |
220 | } while (0) | |
221 | ||
98204646 | 222 | static int snd_pcm_update_hw_ptr_interrupt(struct snd_pcm_substream *substream) |
1da177e4 | 223 | { |
877211f5 | 224 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 | 225 | snd_pcm_uframes_t pos; |
bbf6ad13 JK |
226 | snd_pcm_uframes_t old_hw_ptr, new_hw_ptr, hw_ptr_interrupt, hw_base; |
227 | snd_pcm_sframes_t hdelta, delta; | |
228 | unsigned long jdelta; | |
1da177e4 | 229 | |
bbf6ad13 | 230 | old_hw_ptr = runtime->status->hw_ptr; |
1da177e4 LT |
231 | pos = snd_pcm_update_hw_ptr_pos(substream, runtime); |
232 | if (pos == SNDRV_PCM_POS_XRUN) { | |
233 | xrun(substream); | |
234 | return -EPIPE; | |
235 | } | |
cedb8118 TI |
236 | if (xrun_debug(substream, 8)) { |
237 | char name[16]; | |
238 | pcm_debug_name(substream, name, sizeof(name)); | |
239 | snd_printd("period_update: %s: pos=0x%x/0x%x/0x%x, " | |
240 | "hwptr=0x%lx, hw_base=0x%lx, hw_intr=0x%lx\n", | |
241 | name, pos, | |
242 | (int)runtime->period_size, | |
243 | (int)runtime->buffer_size, | |
244 | (long)old_hw_ptr, | |
245 | (long)runtime->hw_ptr_base, | |
246 | (long)runtime->hw_ptr_interrupt); | |
247 | } | |
ed3da3d9 TI |
248 | hw_base = runtime->hw_ptr_base; |
249 | new_hw_ptr = hw_base + pos; | |
1da177e4 | 250 | hw_ptr_interrupt = runtime->hw_ptr_interrupt + runtime->period_size; |
ed3da3d9 | 251 | delta = new_hw_ptr - hw_ptr_interrupt; |
ded652f7 | 252 | if (hw_ptr_interrupt >= runtime->boundary) { |
8b22d943 TI |
253 | hw_ptr_interrupt -= runtime->boundary; |
254 | if (hw_base < runtime->boundary / 2) | |
255 | /* hw_base was already lapped; recalc delta */ | |
ded652f7 TI |
256 | delta = new_hw_ptr - hw_ptr_interrupt; |
257 | } | |
ed3da3d9 | 258 | if (delta < 0) { |
79452f0a TI |
259 | if (runtime->periods == 1) |
260 | delta += runtime->buffer_size; | |
ed3da3d9 TI |
261 | if (delta < 0) { |
262 | hw_ptr_error(substream, | |
263 | "Unexpected hw_pointer value " | |
264 | "(stream=%i, pos=%ld, intr_ptr=%ld)\n", | |
265 | substream->stream, (long)pos, | |
266 | (long)hw_ptr_interrupt); | |
79452f0a TI |
267 | #if 1 |
268 | /* simply skipping the hwptr update seems more | |
269 | * robust in some cases, e.g. on VMware with | |
270 | * inaccurate timer source | |
271 | */ | |
272 | return 0; /* skip this update */ | |
273 | #else | |
ed3da3d9 TI |
274 | /* rebase to interrupt position */ |
275 | hw_base = new_hw_ptr = hw_ptr_interrupt; | |
ded652f7 TI |
276 | /* align hw_base to buffer_size */ |
277 | hw_base -= hw_base % runtime->buffer_size; | |
ed3da3d9 | 278 | delta = 0; |
79452f0a | 279 | #endif |
ed3da3d9 TI |
280 | } else { |
281 | hw_base += runtime->buffer_size; | |
8b22d943 | 282 | if (hw_base >= runtime->boundary) |
ed3da3d9 TI |
283 | hw_base = 0; |
284 | new_hw_ptr = hw_base + pos; | |
1da177e4 | 285 | } |
1da177e4 | 286 | } |
c87d9732 TI |
287 | |
288 | /* Do jiffies check only in xrun_debug mode */ | |
c62a01ad | 289 | if (!xrun_debug(substream, 4)) |
c87d9732 TI |
290 | goto no_jiffies_check; |
291 | ||
3e5b5016 TI |
292 | /* Skip the jiffies check for hardwares with BATCH flag. |
293 | * Such hardware usually just increases the position at each IRQ, | |
294 | * thus it can't give any strange position. | |
295 | */ | |
296 | if (runtime->hw.info & SNDRV_PCM_INFO_BATCH) | |
297 | goto no_jiffies_check; | |
bbf6ad13 | 298 | hdelta = new_hw_ptr - old_hw_ptr; |
a4444da3 JK |
299 | if (hdelta < runtime->delay) |
300 | goto no_jiffies_check; | |
301 | hdelta -= runtime->delay; | |
bbf6ad13 JK |
302 | jdelta = jiffies - runtime->hw_ptr_jiffies; |
303 | if (((hdelta * HZ) / runtime->rate) > jdelta + HZ/100) { | |
304 | delta = jdelta / | |
305 | (((runtime->period_size * HZ) / runtime->rate) | |
306 | + HZ/100); | |
307 | hw_ptr_error(substream, | |
308 | "hw_ptr skipping! [Q] " | |
309 | "(pos=%ld, delta=%ld, period=%ld, " | |
310 | "jdelta=%lu/%lu/%lu)\n", | |
311 | (long)pos, (long)hdelta, | |
312 | (long)runtime->period_size, jdelta, | |
313 | ((hdelta * HZ) / runtime->rate), delta); | |
314 | hw_ptr_interrupt = runtime->hw_ptr_interrupt + | |
315 | runtime->period_size * delta; | |
316 | if (hw_ptr_interrupt >= runtime->boundary) | |
317 | hw_ptr_interrupt -= runtime->boundary; | |
318 | /* rebase to interrupt position */ | |
319 | hw_base = new_hw_ptr = hw_ptr_interrupt; | |
320 | /* align hw_base to buffer_size */ | |
321 | hw_base -= hw_base % runtime->buffer_size; | |
322 | delta = 0; | |
323 | } | |
3e5b5016 | 324 | no_jiffies_check: |
bbf6ad13 | 325 | if (delta > runtime->period_size + runtime->period_size / 2) { |
ed3da3d9 TI |
326 | hw_ptr_error(substream, |
327 | "Lost interrupts? " | |
328 | "(stream=%i, delta=%ld, intr_ptr=%ld)\n", | |
329 | substream->stream, (long)delta, | |
330 | (long)hw_ptr_interrupt); | |
331 | /* rebase hw_ptr_interrupt */ | |
332 | hw_ptr_interrupt = | |
333 | new_hw_ptr - new_hw_ptr % runtime->period_size; | |
334 | } | |
ab1863fc TI |
335 | runtime->hw_ptr_interrupt = hw_ptr_interrupt; |
336 | ||
1da177e4 LT |
337 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && |
338 | runtime->silence_size > 0) | |
339 | snd_pcm_playback_silence(substream, new_hw_ptr); | |
340 | ||
13f040f9 JK |
341 | if (runtime->status->hw_ptr == new_hw_ptr) |
342 | return 0; | |
343 | ||
ed3da3d9 | 344 | runtime->hw_ptr_base = hw_base; |
1da177e4 | 345 | runtime->status->hw_ptr = new_hw_ptr; |
bbf6ad13 | 346 | runtime->hw_ptr_jiffies = jiffies; |
13f040f9 JK |
347 | if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) |
348 | snd_pcm_gettime(runtime, (struct timespec *)&runtime->status->tstamp); | |
1da177e4 LT |
349 | |
350 | return snd_pcm_update_hw_ptr_post(substream, runtime); | |
351 | } | |
352 | ||
353 | /* CAUTION: call it with irq disabled */ | |
877211f5 | 354 | int snd_pcm_update_hw_ptr(struct snd_pcm_substream *substream) |
1da177e4 | 355 | { |
877211f5 | 356 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 | 357 | snd_pcm_uframes_t pos; |
ed3da3d9 | 358 | snd_pcm_uframes_t old_hw_ptr, new_hw_ptr, hw_base; |
1da177e4 | 359 | snd_pcm_sframes_t delta; |
bbf6ad13 | 360 | unsigned long jdelta; |
1da177e4 LT |
361 | |
362 | old_hw_ptr = runtime->status->hw_ptr; | |
363 | pos = snd_pcm_update_hw_ptr_pos(substream, runtime); | |
364 | if (pos == SNDRV_PCM_POS_XRUN) { | |
365 | xrun(substream); | |
366 | return -EPIPE; | |
367 | } | |
cedb8118 TI |
368 | if (xrun_debug(substream, 16)) { |
369 | char name[16]; | |
370 | pcm_debug_name(substream, name, sizeof(name)); | |
371 | snd_printd("hw_update: %s: pos=0x%x/0x%x/0x%x, " | |
372 | "hwptr=0x%lx, hw_base=0x%lx, hw_intr=0x%lx\n", | |
373 | name, pos, | |
374 | (int)runtime->period_size, | |
375 | (int)runtime->buffer_size, | |
376 | (long)old_hw_ptr, | |
377 | (long)runtime->hw_ptr_base, | |
378 | (long)runtime->hw_ptr_interrupt); | |
379 | } | |
380 | ||
ed3da3d9 TI |
381 | hw_base = runtime->hw_ptr_base; |
382 | new_hw_ptr = hw_base + pos; | |
1da177e4 | 383 | |
ed3da3d9 | 384 | delta = new_hw_ptr - old_hw_ptr; |
bbf6ad13 | 385 | jdelta = jiffies - runtime->hw_ptr_jiffies; |
ed3da3d9 TI |
386 | if (delta < 0) { |
387 | delta += runtime->buffer_size; | |
388 | if (delta < 0) { | |
389 | hw_ptr_error(substream, | |
390 | "Unexpected hw_pointer value [2] " | |
bbf6ad13 | 391 | "(stream=%i, pos=%ld, old_ptr=%ld, jdelta=%li)\n", |
ed3da3d9 | 392 | substream->stream, (long)pos, |
bbf6ad13 | 393 | (long)old_hw_ptr, jdelta); |
1da177e4 LT |
394 | return 0; |
395 | } | |
ed3da3d9 | 396 | hw_base += runtime->buffer_size; |
8b22d943 | 397 | if (hw_base >= runtime->boundary) |
ed3da3d9 TI |
398 | hw_base = 0; |
399 | new_hw_ptr = hw_base + pos; | |
400 | } | |
c87d9732 | 401 | /* Do jiffies check only in xrun_debug mode */ |
a4444da3 JK |
402 | if (!xrun_debug(substream, 4)) |
403 | goto no_jiffies_check; | |
404 | if (delta < runtime->delay) | |
405 | goto no_jiffies_check; | |
406 | delta -= runtime->delay; | |
407 | if (((delta * HZ) / runtime->rate) > jdelta + HZ/100) { | |
ed3da3d9 TI |
408 | hw_ptr_error(substream, |
409 | "hw_ptr skipping! " | |
bbf6ad13 | 410 | "(pos=%ld, delta=%ld, period=%ld, jdelta=%lu/%lu)\n", |
ed3da3d9 | 411 | (long)pos, (long)delta, |
bbf6ad13 JK |
412 | (long)runtime->period_size, jdelta, |
413 | ((delta * HZ) / runtime->rate)); | |
ed3da3d9 | 414 | return 0; |
1da177e4 | 415 | } |
a4444da3 | 416 | no_jiffies_check: |
1da177e4 LT |
417 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && |
418 | runtime->silence_size > 0) | |
419 | snd_pcm_playback_silence(substream, new_hw_ptr); | |
420 | ||
d86bf923 | 421 | if (runtime->status->hw_ptr == new_hw_ptr) |
13f040f9 JK |
422 | return 0; |
423 | ||
ed3da3d9 | 424 | runtime->hw_ptr_base = hw_base; |
1da177e4 | 425 | runtime->status->hw_ptr = new_hw_ptr; |
bbf6ad13 | 426 | runtime->hw_ptr_jiffies = jiffies; |
13f040f9 JK |
427 | if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) |
428 | snd_pcm_gettime(runtime, (struct timespec *)&runtime->status->tstamp); | |
1da177e4 LT |
429 | |
430 | return snd_pcm_update_hw_ptr_post(substream, runtime); | |
431 | } | |
432 | ||
433 | /** | |
434 | * snd_pcm_set_ops - set the PCM operators | |
435 | * @pcm: the pcm instance | |
436 | * @direction: stream direction, SNDRV_PCM_STREAM_XXX | |
437 | * @ops: the operator table | |
438 | * | |
439 | * Sets the given PCM operators to the pcm instance. | |
440 | */ | |
877211f5 | 441 | void snd_pcm_set_ops(struct snd_pcm *pcm, int direction, struct snd_pcm_ops *ops) |
1da177e4 | 442 | { |
877211f5 TI |
443 | struct snd_pcm_str *stream = &pcm->streams[direction]; |
444 | struct snd_pcm_substream *substream; | |
1da177e4 LT |
445 | |
446 | for (substream = stream->substream; substream != NULL; substream = substream->next) | |
447 | substream->ops = ops; | |
448 | } | |
449 | ||
e88e8ae6 | 450 | EXPORT_SYMBOL(snd_pcm_set_ops); |
1da177e4 LT |
451 | |
452 | /** | |
453 | * snd_pcm_sync - set the PCM sync id | |
454 | * @substream: the pcm substream | |
455 | * | |
456 | * Sets the PCM sync identifier for the card. | |
457 | */ | |
877211f5 | 458 | void snd_pcm_set_sync(struct snd_pcm_substream *substream) |
1da177e4 | 459 | { |
877211f5 | 460 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
461 | |
462 | runtime->sync.id32[0] = substream->pcm->card->number; | |
463 | runtime->sync.id32[1] = -1; | |
464 | runtime->sync.id32[2] = -1; | |
465 | runtime->sync.id32[3] = -1; | |
466 | } | |
467 | ||
e88e8ae6 TI |
468 | EXPORT_SYMBOL(snd_pcm_set_sync); |
469 | ||
1da177e4 LT |
470 | /* |
471 | * Standard ioctl routine | |
472 | */ | |
473 | ||
1da177e4 LT |
474 | static inline unsigned int div32(unsigned int a, unsigned int b, |
475 | unsigned int *r) | |
476 | { | |
477 | if (b == 0) { | |
478 | *r = 0; | |
479 | return UINT_MAX; | |
480 | } | |
481 | *r = a % b; | |
482 | return a / b; | |
483 | } | |
484 | ||
485 | static inline unsigned int div_down(unsigned int a, unsigned int b) | |
486 | { | |
487 | if (b == 0) | |
488 | return UINT_MAX; | |
489 | return a / b; | |
490 | } | |
491 | ||
492 | static inline unsigned int div_up(unsigned int a, unsigned int b) | |
493 | { | |
494 | unsigned int r; | |
495 | unsigned int q; | |
496 | if (b == 0) | |
497 | return UINT_MAX; | |
498 | q = div32(a, b, &r); | |
499 | if (r) | |
500 | ++q; | |
501 | return q; | |
502 | } | |
503 | ||
504 | static inline unsigned int mul(unsigned int a, unsigned int b) | |
505 | { | |
506 | if (a == 0) | |
507 | return 0; | |
508 | if (div_down(UINT_MAX, a) < b) | |
509 | return UINT_MAX; | |
510 | return a * b; | |
511 | } | |
512 | ||
513 | static inline unsigned int muldiv32(unsigned int a, unsigned int b, | |
514 | unsigned int c, unsigned int *r) | |
515 | { | |
516 | u_int64_t n = (u_int64_t) a * b; | |
517 | if (c == 0) { | |
7eaa943c | 518 | snd_BUG_ON(!n); |
1da177e4 LT |
519 | *r = 0; |
520 | return UINT_MAX; | |
521 | } | |
3f7440a6 | 522 | n = div_u64_rem(n, c, r); |
1da177e4 LT |
523 | if (n >= UINT_MAX) { |
524 | *r = 0; | |
525 | return UINT_MAX; | |
526 | } | |
527 | return n; | |
528 | } | |
529 | ||
1da177e4 LT |
530 | /** |
531 | * snd_interval_refine - refine the interval value of configurator | |
532 | * @i: the interval value to refine | |
533 | * @v: the interval value to refer to | |
534 | * | |
535 | * Refines the interval value with the reference value. | |
536 | * The interval is changed to the range satisfying both intervals. | |
537 | * The interval status (min, max, integer, etc.) are evaluated. | |
538 | * | |
539 | * Returns non-zero if the value is changed, zero if not changed. | |
540 | */ | |
877211f5 | 541 | int snd_interval_refine(struct snd_interval *i, const struct snd_interval *v) |
1da177e4 LT |
542 | { |
543 | int changed = 0; | |
7eaa943c TI |
544 | if (snd_BUG_ON(snd_interval_empty(i))) |
545 | return -EINVAL; | |
1da177e4 LT |
546 | if (i->min < v->min) { |
547 | i->min = v->min; | |
548 | i->openmin = v->openmin; | |
549 | changed = 1; | |
550 | } else if (i->min == v->min && !i->openmin && v->openmin) { | |
551 | i->openmin = 1; | |
552 | changed = 1; | |
553 | } | |
554 | if (i->max > v->max) { | |
555 | i->max = v->max; | |
556 | i->openmax = v->openmax; | |
557 | changed = 1; | |
558 | } else if (i->max == v->max && !i->openmax && v->openmax) { | |
559 | i->openmax = 1; | |
560 | changed = 1; | |
561 | } | |
562 | if (!i->integer && v->integer) { | |
563 | i->integer = 1; | |
564 | changed = 1; | |
565 | } | |
566 | if (i->integer) { | |
567 | if (i->openmin) { | |
568 | i->min++; | |
569 | i->openmin = 0; | |
570 | } | |
571 | if (i->openmax) { | |
572 | i->max--; | |
573 | i->openmax = 0; | |
574 | } | |
575 | } else if (!i->openmin && !i->openmax && i->min == i->max) | |
576 | i->integer = 1; | |
577 | if (snd_interval_checkempty(i)) { | |
578 | snd_interval_none(i); | |
579 | return -EINVAL; | |
580 | } | |
581 | return changed; | |
582 | } | |
583 | ||
e88e8ae6 TI |
584 | EXPORT_SYMBOL(snd_interval_refine); |
585 | ||
877211f5 | 586 | static int snd_interval_refine_first(struct snd_interval *i) |
1da177e4 | 587 | { |
7eaa943c TI |
588 | if (snd_BUG_ON(snd_interval_empty(i))) |
589 | return -EINVAL; | |
1da177e4 LT |
590 | if (snd_interval_single(i)) |
591 | return 0; | |
592 | i->max = i->min; | |
593 | i->openmax = i->openmin; | |
594 | if (i->openmax) | |
595 | i->max++; | |
596 | return 1; | |
597 | } | |
598 | ||
877211f5 | 599 | static int snd_interval_refine_last(struct snd_interval *i) |
1da177e4 | 600 | { |
7eaa943c TI |
601 | if (snd_BUG_ON(snd_interval_empty(i))) |
602 | return -EINVAL; | |
1da177e4 LT |
603 | if (snd_interval_single(i)) |
604 | return 0; | |
605 | i->min = i->max; | |
606 | i->openmin = i->openmax; | |
607 | if (i->openmin) | |
608 | i->min--; | |
609 | return 1; | |
610 | } | |
611 | ||
877211f5 | 612 | void snd_interval_mul(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c) |
1da177e4 LT |
613 | { |
614 | if (a->empty || b->empty) { | |
615 | snd_interval_none(c); | |
616 | return; | |
617 | } | |
618 | c->empty = 0; | |
619 | c->min = mul(a->min, b->min); | |
620 | c->openmin = (a->openmin || b->openmin); | |
621 | c->max = mul(a->max, b->max); | |
622 | c->openmax = (a->openmax || b->openmax); | |
623 | c->integer = (a->integer && b->integer); | |
624 | } | |
625 | ||
626 | /** | |
627 | * snd_interval_div - refine the interval value with division | |
df8db936 TI |
628 | * @a: dividend |
629 | * @b: divisor | |
630 | * @c: quotient | |
1da177e4 LT |
631 | * |
632 | * c = a / b | |
633 | * | |
634 | * Returns non-zero if the value is changed, zero if not changed. | |
635 | */ | |
877211f5 | 636 | void snd_interval_div(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c) |
1da177e4 LT |
637 | { |
638 | unsigned int r; | |
639 | if (a->empty || b->empty) { | |
640 | snd_interval_none(c); | |
641 | return; | |
642 | } | |
643 | c->empty = 0; | |
644 | c->min = div32(a->min, b->max, &r); | |
645 | c->openmin = (r || a->openmin || b->openmax); | |
646 | if (b->min > 0) { | |
647 | c->max = div32(a->max, b->min, &r); | |
648 | if (r) { | |
649 | c->max++; | |
650 | c->openmax = 1; | |
651 | } else | |
652 | c->openmax = (a->openmax || b->openmin); | |
653 | } else { | |
654 | c->max = UINT_MAX; | |
655 | c->openmax = 0; | |
656 | } | |
657 | c->integer = 0; | |
658 | } | |
659 | ||
660 | /** | |
661 | * snd_interval_muldivk - refine the interval value | |
df8db936 TI |
662 | * @a: dividend 1 |
663 | * @b: dividend 2 | |
664 | * @k: divisor (as integer) | |
665 | * @c: result | |
666 | * | |
1da177e4 LT |
667 | * c = a * b / k |
668 | * | |
669 | * Returns non-zero if the value is changed, zero if not changed. | |
670 | */ | |
877211f5 TI |
671 | void snd_interval_muldivk(const struct snd_interval *a, const struct snd_interval *b, |
672 | unsigned int k, struct snd_interval *c) | |
1da177e4 LT |
673 | { |
674 | unsigned int r; | |
675 | if (a->empty || b->empty) { | |
676 | snd_interval_none(c); | |
677 | return; | |
678 | } | |
679 | c->empty = 0; | |
680 | c->min = muldiv32(a->min, b->min, k, &r); | |
681 | c->openmin = (r || a->openmin || b->openmin); | |
682 | c->max = muldiv32(a->max, b->max, k, &r); | |
683 | if (r) { | |
684 | c->max++; | |
685 | c->openmax = 1; | |
686 | } else | |
687 | c->openmax = (a->openmax || b->openmax); | |
688 | c->integer = 0; | |
689 | } | |
690 | ||
691 | /** | |
692 | * snd_interval_mulkdiv - refine the interval value | |
df8db936 TI |
693 | * @a: dividend 1 |
694 | * @k: dividend 2 (as integer) | |
695 | * @b: divisor | |
696 | * @c: result | |
1da177e4 LT |
697 | * |
698 | * c = a * k / b | |
699 | * | |
700 | * Returns non-zero if the value is changed, zero if not changed. | |
701 | */ | |
877211f5 TI |
702 | void snd_interval_mulkdiv(const struct snd_interval *a, unsigned int k, |
703 | const struct snd_interval *b, struct snd_interval *c) | |
1da177e4 LT |
704 | { |
705 | unsigned int r; | |
706 | if (a->empty || b->empty) { | |
707 | snd_interval_none(c); | |
708 | return; | |
709 | } | |
710 | c->empty = 0; | |
711 | c->min = muldiv32(a->min, k, b->max, &r); | |
712 | c->openmin = (r || a->openmin || b->openmax); | |
713 | if (b->min > 0) { | |
714 | c->max = muldiv32(a->max, k, b->min, &r); | |
715 | if (r) { | |
716 | c->max++; | |
717 | c->openmax = 1; | |
718 | } else | |
719 | c->openmax = (a->openmax || b->openmin); | |
720 | } else { | |
721 | c->max = UINT_MAX; | |
722 | c->openmax = 0; | |
723 | } | |
724 | c->integer = 0; | |
725 | } | |
726 | ||
1da177e4 LT |
727 | /* ---- */ |
728 | ||
729 | ||
730 | /** | |
731 | * snd_interval_ratnum - refine the interval value | |
df8db936 TI |
732 | * @i: interval to refine |
733 | * @rats_count: number of ratnum_t | |
734 | * @rats: ratnum_t array | |
735 | * @nump: pointer to store the resultant numerator | |
736 | * @denp: pointer to store the resultant denominator | |
1da177e4 LT |
737 | * |
738 | * Returns non-zero if the value is changed, zero if not changed. | |
739 | */ | |
877211f5 TI |
740 | int snd_interval_ratnum(struct snd_interval *i, |
741 | unsigned int rats_count, struct snd_ratnum *rats, | |
742 | unsigned int *nump, unsigned int *denp) | |
1da177e4 LT |
743 | { |
744 | unsigned int best_num, best_diff, best_den; | |
745 | unsigned int k; | |
877211f5 | 746 | struct snd_interval t; |
1da177e4 LT |
747 | int err; |
748 | ||
749 | best_num = best_den = best_diff = 0; | |
750 | for (k = 0; k < rats_count; ++k) { | |
751 | unsigned int num = rats[k].num; | |
752 | unsigned int den; | |
753 | unsigned int q = i->min; | |
754 | int diff; | |
755 | if (q == 0) | |
756 | q = 1; | |
757 | den = div_down(num, q); | |
758 | if (den < rats[k].den_min) | |
759 | continue; | |
760 | if (den > rats[k].den_max) | |
761 | den = rats[k].den_max; | |
762 | else { | |
763 | unsigned int r; | |
764 | r = (den - rats[k].den_min) % rats[k].den_step; | |
765 | if (r != 0) | |
766 | den -= r; | |
767 | } | |
768 | diff = num - q * den; | |
769 | if (best_num == 0 || | |
770 | diff * best_den < best_diff * den) { | |
771 | best_diff = diff; | |
772 | best_den = den; | |
773 | best_num = num; | |
774 | } | |
775 | } | |
776 | if (best_den == 0) { | |
777 | i->empty = 1; | |
778 | return -EINVAL; | |
779 | } | |
780 | t.min = div_down(best_num, best_den); | |
781 | t.openmin = !!(best_num % best_den); | |
782 | ||
783 | best_num = best_den = best_diff = 0; | |
784 | for (k = 0; k < rats_count; ++k) { | |
785 | unsigned int num = rats[k].num; | |
786 | unsigned int den; | |
787 | unsigned int q = i->max; | |
788 | int diff; | |
789 | if (q == 0) { | |
790 | i->empty = 1; | |
791 | return -EINVAL; | |
792 | } | |
793 | den = div_up(num, q); | |
794 | if (den > rats[k].den_max) | |
795 | continue; | |
796 | if (den < rats[k].den_min) | |
797 | den = rats[k].den_min; | |
798 | else { | |
799 | unsigned int r; | |
800 | r = (den - rats[k].den_min) % rats[k].den_step; | |
801 | if (r != 0) | |
802 | den += rats[k].den_step - r; | |
803 | } | |
804 | diff = q * den - num; | |
805 | if (best_num == 0 || | |
806 | diff * best_den < best_diff * den) { | |
807 | best_diff = diff; | |
808 | best_den = den; | |
809 | best_num = num; | |
810 | } | |
811 | } | |
812 | if (best_den == 0) { | |
813 | i->empty = 1; | |
814 | return -EINVAL; | |
815 | } | |
816 | t.max = div_up(best_num, best_den); | |
817 | t.openmax = !!(best_num % best_den); | |
818 | t.integer = 0; | |
819 | err = snd_interval_refine(i, &t); | |
820 | if (err < 0) | |
821 | return err; | |
822 | ||
823 | if (snd_interval_single(i)) { | |
824 | if (nump) | |
825 | *nump = best_num; | |
826 | if (denp) | |
827 | *denp = best_den; | |
828 | } | |
829 | return err; | |
830 | } | |
831 | ||
e88e8ae6 TI |
832 | EXPORT_SYMBOL(snd_interval_ratnum); |
833 | ||
1da177e4 LT |
834 | /** |
835 | * snd_interval_ratden - refine the interval value | |
df8db936 | 836 | * @i: interval to refine |
877211f5 TI |
837 | * @rats_count: number of struct ratden |
838 | * @rats: struct ratden array | |
df8db936 TI |
839 | * @nump: pointer to store the resultant numerator |
840 | * @denp: pointer to store the resultant denominator | |
1da177e4 LT |
841 | * |
842 | * Returns non-zero if the value is changed, zero if not changed. | |
843 | */ | |
877211f5 TI |
844 | static int snd_interval_ratden(struct snd_interval *i, |
845 | unsigned int rats_count, struct snd_ratden *rats, | |
1da177e4 LT |
846 | unsigned int *nump, unsigned int *denp) |
847 | { | |
848 | unsigned int best_num, best_diff, best_den; | |
849 | unsigned int k; | |
877211f5 | 850 | struct snd_interval t; |
1da177e4 LT |
851 | int err; |
852 | ||
853 | best_num = best_den = best_diff = 0; | |
854 | for (k = 0; k < rats_count; ++k) { | |
855 | unsigned int num; | |
856 | unsigned int den = rats[k].den; | |
857 | unsigned int q = i->min; | |
858 | int diff; | |
859 | num = mul(q, den); | |
860 | if (num > rats[k].num_max) | |
861 | continue; | |
862 | if (num < rats[k].num_min) | |
863 | num = rats[k].num_max; | |
864 | else { | |
865 | unsigned int r; | |
866 | r = (num - rats[k].num_min) % rats[k].num_step; | |
867 | if (r != 0) | |
868 | num += rats[k].num_step - r; | |
869 | } | |
870 | diff = num - q * den; | |
871 | if (best_num == 0 || | |
872 | diff * best_den < best_diff * den) { | |
873 | best_diff = diff; | |
874 | best_den = den; | |
875 | best_num = num; | |
876 | } | |
877 | } | |
878 | if (best_den == 0) { | |
879 | i->empty = 1; | |
880 | return -EINVAL; | |
881 | } | |
882 | t.min = div_down(best_num, best_den); | |
883 | t.openmin = !!(best_num % best_den); | |
884 | ||
885 | best_num = best_den = best_diff = 0; | |
886 | for (k = 0; k < rats_count; ++k) { | |
887 | unsigned int num; | |
888 | unsigned int den = rats[k].den; | |
889 | unsigned int q = i->max; | |
890 | int diff; | |
891 | num = mul(q, den); | |
892 | if (num < rats[k].num_min) | |
893 | continue; | |
894 | if (num > rats[k].num_max) | |
895 | num = rats[k].num_max; | |
896 | else { | |
897 | unsigned int r; | |
898 | r = (num - rats[k].num_min) % rats[k].num_step; | |
899 | if (r != 0) | |
900 | num -= r; | |
901 | } | |
902 | diff = q * den - num; | |
903 | if (best_num == 0 || | |
904 | diff * best_den < best_diff * den) { | |
905 | best_diff = diff; | |
906 | best_den = den; | |
907 | best_num = num; | |
908 | } | |
909 | } | |
910 | if (best_den == 0) { | |
911 | i->empty = 1; | |
912 | return -EINVAL; | |
913 | } | |
914 | t.max = div_up(best_num, best_den); | |
915 | t.openmax = !!(best_num % best_den); | |
916 | t.integer = 0; | |
917 | err = snd_interval_refine(i, &t); | |
918 | if (err < 0) | |
919 | return err; | |
920 | ||
921 | if (snd_interval_single(i)) { | |
922 | if (nump) | |
923 | *nump = best_num; | |
924 | if (denp) | |
925 | *denp = best_den; | |
926 | } | |
927 | return err; | |
928 | } | |
929 | ||
930 | /** | |
931 | * snd_interval_list - refine the interval value from the list | |
932 | * @i: the interval value to refine | |
933 | * @count: the number of elements in the list | |
934 | * @list: the value list | |
935 | * @mask: the bit-mask to evaluate | |
936 | * | |
937 | * Refines the interval value from the list. | |
938 | * When mask is non-zero, only the elements corresponding to bit 1 are | |
939 | * evaluated. | |
940 | * | |
941 | * Returns non-zero if the value is changed, zero if not changed. | |
942 | */ | |
877211f5 | 943 | int snd_interval_list(struct snd_interval *i, unsigned int count, unsigned int *list, unsigned int mask) |
1da177e4 LT |
944 | { |
945 | unsigned int k; | |
946 | int changed = 0; | |
0981a260 TI |
947 | |
948 | if (!count) { | |
949 | i->empty = 1; | |
950 | return -EINVAL; | |
951 | } | |
1da177e4 LT |
952 | for (k = 0; k < count; k++) { |
953 | if (mask && !(mask & (1 << k))) | |
954 | continue; | |
955 | if (i->min == list[k] && !i->openmin) | |
956 | goto _l1; | |
957 | if (i->min < list[k]) { | |
958 | i->min = list[k]; | |
959 | i->openmin = 0; | |
960 | changed = 1; | |
961 | goto _l1; | |
962 | } | |
963 | } | |
964 | i->empty = 1; | |
965 | return -EINVAL; | |
966 | _l1: | |
967 | for (k = count; k-- > 0;) { | |
968 | if (mask && !(mask & (1 << k))) | |
969 | continue; | |
970 | if (i->max == list[k] && !i->openmax) | |
971 | goto _l2; | |
972 | if (i->max > list[k]) { | |
973 | i->max = list[k]; | |
974 | i->openmax = 0; | |
975 | changed = 1; | |
976 | goto _l2; | |
977 | } | |
978 | } | |
979 | i->empty = 1; | |
980 | return -EINVAL; | |
981 | _l2: | |
982 | if (snd_interval_checkempty(i)) { | |
983 | i->empty = 1; | |
984 | return -EINVAL; | |
985 | } | |
986 | return changed; | |
987 | } | |
988 | ||
e88e8ae6 TI |
989 | EXPORT_SYMBOL(snd_interval_list); |
990 | ||
877211f5 | 991 | static int snd_interval_step(struct snd_interval *i, unsigned int min, unsigned int step) |
1da177e4 LT |
992 | { |
993 | unsigned int n; | |
994 | int changed = 0; | |
995 | n = (i->min - min) % step; | |
996 | if (n != 0 || i->openmin) { | |
997 | i->min += step - n; | |
998 | changed = 1; | |
999 | } | |
1000 | n = (i->max - min) % step; | |
1001 | if (n != 0 || i->openmax) { | |
1002 | i->max -= n; | |
1003 | changed = 1; | |
1004 | } | |
1005 | if (snd_interval_checkempty(i)) { | |
1006 | i->empty = 1; | |
1007 | return -EINVAL; | |
1008 | } | |
1009 | return changed; | |
1010 | } | |
1011 | ||
1012 | /* Info constraints helpers */ | |
1013 | ||
1014 | /** | |
1015 | * snd_pcm_hw_rule_add - add the hw-constraint rule | |
1016 | * @runtime: the pcm runtime instance | |
1017 | * @cond: condition bits | |
1018 | * @var: the variable to evaluate | |
1019 | * @func: the evaluation function | |
1020 | * @private: the private data pointer passed to function | |
1021 | * @dep: the dependent variables | |
1022 | * | |
1023 | * Returns zero if successful, or a negative error code on failure. | |
1024 | */ | |
877211f5 | 1025 | int snd_pcm_hw_rule_add(struct snd_pcm_runtime *runtime, unsigned int cond, |
1da177e4 LT |
1026 | int var, |
1027 | snd_pcm_hw_rule_func_t func, void *private, | |
1028 | int dep, ...) | |
1029 | { | |
877211f5 TI |
1030 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; |
1031 | struct snd_pcm_hw_rule *c; | |
1da177e4 LT |
1032 | unsigned int k; |
1033 | va_list args; | |
1034 | va_start(args, dep); | |
1035 | if (constrs->rules_num >= constrs->rules_all) { | |
877211f5 | 1036 | struct snd_pcm_hw_rule *new; |
1da177e4 LT |
1037 | unsigned int new_rules = constrs->rules_all + 16; |
1038 | new = kcalloc(new_rules, sizeof(*c), GFP_KERNEL); | |
1039 | if (!new) | |
1040 | return -ENOMEM; | |
1041 | if (constrs->rules) { | |
1042 | memcpy(new, constrs->rules, | |
1043 | constrs->rules_num * sizeof(*c)); | |
1044 | kfree(constrs->rules); | |
1045 | } | |
1046 | constrs->rules = new; | |
1047 | constrs->rules_all = new_rules; | |
1048 | } | |
1049 | c = &constrs->rules[constrs->rules_num]; | |
1050 | c->cond = cond; | |
1051 | c->func = func; | |
1052 | c->var = var; | |
1053 | c->private = private; | |
1054 | k = 0; | |
1055 | while (1) { | |
7eaa943c TI |
1056 | if (snd_BUG_ON(k >= ARRAY_SIZE(c->deps))) |
1057 | return -EINVAL; | |
1da177e4 LT |
1058 | c->deps[k++] = dep; |
1059 | if (dep < 0) | |
1060 | break; | |
1061 | dep = va_arg(args, int); | |
1062 | } | |
1063 | constrs->rules_num++; | |
1064 | va_end(args); | |
1065 | return 0; | |
1066 | } | |
1067 | ||
e88e8ae6 TI |
1068 | EXPORT_SYMBOL(snd_pcm_hw_rule_add); |
1069 | ||
1da177e4 | 1070 | /** |
1c85cc64 | 1071 | * snd_pcm_hw_constraint_mask - apply the given bitmap mask constraint |
df8db936 TI |
1072 | * @runtime: PCM runtime instance |
1073 | * @var: hw_params variable to apply the mask | |
1074 | * @mask: the bitmap mask | |
1075 | * | |
1c85cc64 | 1076 | * Apply the constraint of the given bitmap mask to a 32-bit mask parameter. |
1da177e4 | 1077 | */ |
877211f5 | 1078 | int snd_pcm_hw_constraint_mask(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, |
1da177e4 LT |
1079 | u_int32_t mask) |
1080 | { | |
877211f5 TI |
1081 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; |
1082 | struct snd_mask *maskp = constrs_mask(constrs, var); | |
1da177e4 LT |
1083 | *maskp->bits &= mask; |
1084 | memset(maskp->bits + 1, 0, (SNDRV_MASK_MAX-32) / 8); /* clear rest */ | |
1085 | if (*maskp->bits == 0) | |
1086 | return -EINVAL; | |
1087 | return 0; | |
1088 | } | |
1089 | ||
1090 | /** | |
1c85cc64 | 1091 | * snd_pcm_hw_constraint_mask64 - apply the given bitmap mask constraint |
df8db936 TI |
1092 | * @runtime: PCM runtime instance |
1093 | * @var: hw_params variable to apply the mask | |
1094 | * @mask: the 64bit bitmap mask | |
1095 | * | |
1c85cc64 | 1096 | * Apply the constraint of the given bitmap mask to a 64-bit mask parameter. |
1da177e4 | 1097 | */ |
877211f5 | 1098 | int snd_pcm_hw_constraint_mask64(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, |
1da177e4 LT |
1099 | u_int64_t mask) |
1100 | { | |
877211f5 TI |
1101 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; |
1102 | struct snd_mask *maskp = constrs_mask(constrs, var); | |
1da177e4 LT |
1103 | maskp->bits[0] &= (u_int32_t)mask; |
1104 | maskp->bits[1] &= (u_int32_t)(mask >> 32); | |
1105 | memset(maskp->bits + 2, 0, (SNDRV_MASK_MAX-64) / 8); /* clear rest */ | |
1106 | if (! maskp->bits[0] && ! maskp->bits[1]) | |
1107 | return -EINVAL; | |
1108 | return 0; | |
1109 | } | |
1110 | ||
1111 | /** | |
1c85cc64 | 1112 | * snd_pcm_hw_constraint_integer - apply an integer constraint to an interval |
df8db936 TI |
1113 | * @runtime: PCM runtime instance |
1114 | * @var: hw_params variable to apply the integer constraint | |
1115 | * | |
1116 | * Apply the constraint of integer to an interval parameter. | |
1da177e4 | 1117 | */ |
877211f5 | 1118 | int snd_pcm_hw_constraint_integer(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var) |
1da177e4 | 1119 | { |
877211f5 | 1120 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; |
1da177e4 LT |
1121 | return snd_interval_setinteger(constrs_interval(constrs, var)); |
1122 | } | |
1123 | ||
e88e8ae6 TI |
1124 | EXPORT_SYMBOL(snd_pcm_hw_constraint_integer); |
1125 | ||
1da177e4 | 1126 | /** |
1c85cc64 | 1127 | * snd_pcm_hw_constraint_minmax - apply a min/max range constraint to an interval |
df8db936 TI |
1128 | * @runtime: PCM runtime instance |
1129 | * @var: hw_params variable to apply the range | |
1130 | * @min: the minimal value | |
1131 | * @max: the maximal value | |
1132 | * | |
1133 | * Apply the min/max range constraint to an interval parameter. | |
1da177e4 | 1134 | */ |
877211f5 | 1135 | int snd_pcm_hw_constraint_minmax(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, |
1da177e4 LT |
1136 | unsigned int min, unsigned int max) |
1137 | { | |
877211f5 TI |
1138 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; |
1139 | struct snd_interval t; | |
1da177e4 LT |
1140 | t.min = min; |
1141 | t.max = max; | |
1142 | t.openmin = t.openmax = 0; | |
1143 | t.integer = 0; | |
1144 | return snd_interval_refine(constrs_interval(constrs, var), &t); | |
1145 | } | |
1146 | ||
e88e8ae6 TI |
1147 | EXPORT_SYMBOL(snd_pcm_hw_constraint_minmax); |
1148 | ||
877211f5 TI |
1149 | static int snd_pcm_hw_rule_list(struct snd_pcm_hw_params *params, |
1150 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 1151 | { |
877211f5 | 1152 | struct snd_pcm_hw_constraint_list *list = rule->private; |
1da177e4 LT |
1153 | return snd_interval_list(hw_param_interval(params, rule->var), list->count, list->list, list->mask); |
1154 | } | |
1155 | ||
1156 | ||
1157 | /** | |
1c85cc64 | 1158 | * snd_pcm_hw_constraint_list - apply a list of constraints to a parameter |
df8db936 TI |
1159 | * @runtime: PCM runtime instance |
1160 | * @cond: condition bits | |
1161 | * @var: hw_params variable to apply the list constraint | |
1162 | * @l: list | |
1163 | * | |
1164 | * Apply the list of constraints to an interval parameter. | |
1da177e4 | 1165 | */ |
877211f5 | 1166 | int snd_pcm_hw_constraint_list(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1167 | unsigned int cond, |
1168 | snd_pcm_hw_param_t var, | |
877211f5 | 1169 | struct snd_pcm_hw_constraint_list *l) |
1da177e4 LT |
1170 | { |
1171 | return snd_pcm_hw_rule_add(runtime, cond, var, | |
1172 | snd_pcm_hw_rule_list, l, | |
1173 | var, -1); | |
1174 | } | |
1175 | ||
e88e8ae6 TI |
1176 | EXPORT_SYMBOL(snd_pcm_hw_constraint_list); |
1177 | ||
877211f5 TI |
1178 | static int snd_pcm_hw_rule_ratnums(struct snd_pcm_hw_params *params, |
1179 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 1180 | { |
877211f5 | 1181 | struct snd_pcm_hw_constraint_ratnums *r = rule->private; |
1da177e4 LT |
1182 | unsigned int num = 0, den = 0; |
1183 | int err; | |
1184 | err = snd_interval_ratnum(hw_param_interval(params, rule->var), | |
1185 | r->nrats, r->rats, &num, &den); | |
1186 | if (err >= 0 && den && rule->var == SNDRV_PCM_HW_PARAM_RATE) { | |
1187 | params->rate_num = num; | |
1188 | params->rate_den = den; | |
1189 | } | |
1190 | return err; | |
1191 | } | |
1192 | ||
1193 | /** | |
1c85cc64 | 1194 | * snd_pcm_hw_constraint_ratnums - apply ratnums constraint to a parameter |
df8db936 TI |
1195 | * @runtime: PCM runtime instance |
1196 | * @cond: condition bits | |
1197 | * @var: hw_params variable to apply the ratnums constraint | |
877211f5 | 1198 | * @r: struct snd_ratnums constriants |
1da177e4 | 1199 | */ |
877211f5 | 1200 | int snd_pcm_hw_constraint_ratnums(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1201 | unsigned int cond, |
1202 | snd_pcm_hw_param_t var, | |
877211f5 | 1203 | struct snd_pcm_hw_constraint_ratnums *r) |
1da177e4 LT |
1204 | { |
1205 | return snd_pcm_hw_rule_add(runtime, cond, var, | |
1206 | snd_pcm_hw_rule_ratnums, r, | |
1207 | var, -1); | |
1208 | } | |
1209 | ||
e88e8ae6 TI |
1210 | EXPORT_SYMBOL(snd_pcm_hw_constraint_ratnums); |
1211 | ||
877211f5 TI |
1212 | static int snd_pcm_hw_rule_ratdens(struct snd_pcm_hw_params *params, |
1213 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 1214 | { |
877211f5 | 1215 | struct snd_pcm_hw_constraint_ratdens *r = rule->private; |
1da177e4 LT |
1216 | unsigned int num = 0, den = 0; |
1217 | int err = snd_interval_ratden(hw_param_interval(params, rule->var), | |
1218 | r->nrats, r->rats, &num, &den); | |
1219 | if (err >= 0 && den && rule->var == SNDRV_PCM_HW_PARAM_RATE) { | |
1220 | params->rate_num = num; | |
1221 | params->rate_den = den; | |
1222 | } | |
1223 | return err; | |
1224 | } | |
1225 | ||
1226 | /** | |
1c85cc64 | 1227 | * snd_pcm_hw_constraint_ratdens - apply ratdens constraint to a parameter |
df8db936 TI |
1228 | * @runtime: PCM runtime instance |
1229 | * @cond: condition bits | |
1230 | * @var: hw_params variable to apply the ratdens constraint | |
877211f5 | 1231 | * @r: struct snd_ratdens constriants |
1da177e4 | 1232 | */ |
877211f5 | 1233 | int snd_pcm_hw_constraint_ratdens(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1234 | unsigned int cond, |
1235 | snd_pcm_hw_param_t var, | |
877211f5 | 1236 | struct snd_pcm_hw_constraint_ratdens *r) |
1da177e4 LT |
1237 | { |
1238 | return snd_pcm_hw_rule_add(runtime, cond, var, | |
1239 | snd_pcm_hw_rule_ratdens, r, | |
1240 | var, -1); | |
1241 | } | |
1242 | ||
e88e8ae6 TI |
1243 | EXPORT_SYMBOL(snd_pcm_hw_constraint_ratdens); |
1244 | ||
877211f5 TI |
1245 | static int snd_pcm_hw_rule_msbits(struct snd_pcm_hw_params *params, |
1246 | struct snd_pcm_hw_rule *rule) | |
1da177e4 LT |
1247 | { |
1248 | unsigned int l = (unsigned long) rule->private; | |
1249 | int width = l & 0xffff; | |
1250 | unsigned int msbits = l >> 16; | |
877211f5 | 1251 | struct snd_interval *i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS); |
1da177e4 LT |
1252 | if (snd_interval_single(i) && snd_interval_value(i) == width) |
1253 | params->msbits = msbits; | |
1254 | return 0; | |
1255 | } | |
1256 | ||
1257 | /** | |
1c85cc64 | 1258 | * snd_pcm_hw_constraint_msbits - add a hw constraint msbits rule |
df8db936 TI |
1259 | * @runtime: PCM runtime instance |
1260 | * @cond: condition bits | |
1261 | * @width: sample bits width | |
1262 | * @msbits: msbits width | |
1da177e4 | 1263 | */ |
877211f5 | 1264 | int snd_pcm_hw_constraint_msbits(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1265 | unsigned int cond, |
1266 | unsigned int width, | |
1267 | unsigned int msbits) | |
1268 | { | |
1269 | unsigned long l = (msbits << 16) | width; | |
1270 | return snd_pcm_hw_rule_add(runtime, cond, -1, | |
1271 | snd_pcm_hw_rule_msbits, | |
1272 | (void*) l, | |
1273 | SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); | |
1274 | } | |
1275 | ||
e88e8ae6 TI |
1276 | EXPORT_SYMBOL(snd_pcm_hw_constraint_msbits); |
1277 | ||
877211f5 TI |
1278 | static int snd_pcm_hw_rule_step(struct snd_pcm_hw_params *params, |
1279 | struct snd_pcm_hw_rule *rule) | |
1da177e4 LT |
1280 | { |
1281 | unsigned long step = (unsigned long) rule->private; | |
1282 | return snd_interval_step(hw_param_interval(params, rule->var), 0, step); | |
1283 | } | |
1284 | ||
1285 | /** | |
1c85cc64 | 1286 | * snd_pcm_hw_constraint_step - add a hw constraint step rule |
df8db936 TI |
1287 | * @runtime: PCM runtime instance |
1288 | * @cond: condition bits | |
1289 | * @var: hw_params variable to apply the step constraint | |
1290 | * @step: step size | |
1da177e4 | 1291 | */ |
877211f5 | 1292 | int snd_pcm_hw_constraint_step(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1293 | unsigned int cond, |
1294 | snd_pcm_hw_param_t var, | |
1295 | unsigned long step) | |
1296 | { | |
1297 | return snd_pcm_hw_rule_add(runtime, cond, var, | |
1298 | snd_pcm_hw_rule_step, (void *) step, | |
1299 | var, -1); | |
1300 | } | |
1301 | ||
e88e8ae6 TI |
1302 | EXPORT_SYMBOL(snd_pcm_hw_constraint_step); |
1303 | ||
877211f5 | 1304 | static int snd_pcm_hw_rule_pow2(struct snd_pcm_hw_params *params, struct snd_pcm_hw_rule *rule) |
1da177e4 | 1305 | { |
67c39317 | 1306 | static unsigned int pow2_sizes[] = { |
1da177e4 LT |
1307 | 1<<0, 1<<1, 1<<2, 1<<3, 1<<4, 1<<5, 1<<6, 1<<7, |
1308 | 1<<8, 1<<9, 1<<10, 1<<11, 1<<12, 1<<13, 1<<14, 1<<15, | |
1309 | 1<<16, 1<<17, 1<<18, 1<<19, 1<<20, 1<<21, 1<<22, 1<<23, | |
1310 | 1<<24, 1<<25, 1<<26, 1<<27, 1<<28, 1<<29, 1<<30 | |
1311 | }; | |
1312 | return snd_interval_list(hw_param_interval(params, rule->var), | |
1313 | ARRAY_SIZE(pow2_sizes), pow2_sizes, 0); | |
1314 | } | |
1315 | ||
1316 | /** | |
1c85cc64 | 1317 | * snd_pcm_hw_constraint_pow2 - add a hw constraint power-of-2 rule |
df8db936 TI |
1318 | * @runtime: PCM runtime instance |
1319 | * @cond: condition bits | |
1320 | * @var: hw_params variable to apply the power-of-2 constraint | |
1da177e4 | 1321 | */ |
877211f5 | 1322 | int snd_pcm_hw_constraint_pow2(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1323 | unsigned int cond, |
1324 | snd_pcm_hw_param_t var) | |
1325 | { | |
1326 | return snd_pcm_hw_rule_add(runtime, cond, var, | |
1327 | snd_pcm_hw_rule_pow2, NULL, | |
1328 | var, -1); | |
1329 | } | |
1330 | ||
e88e8ae6 TI |
1331 | EXPORT_SYMBOL(snd_pcm_hw_constraint_pow2); |
1332 | ||
877211f5 | 1333 | static void _snd_pcm_hw_param_any(struct snd_pcm_hw_params *params, |
123992f7 | 1334 | snd_pcm_hw_param_t var) |
1da177e4 LT |
1335 | { |
1336 | if (hw_is_mask(var)) { | |
1337 | snd_mask_any(hw_param_mask(params, var)); | |
1338 | params->cmask |= 1 << var; | |
1339 | params->rmask |= 1 << var; | |
1340 | return; | |
1341 | } | |
1342 | if (hw_is_interval(var)) { | |
1343 | snd_interval_any(hw_param_interval(params, var)); | |
1344 | params->cmask |= 1 << var; | |
1345 | params->rmask |= 1 << var; | |
1346 | return; | |
1347 | } | |
1348 | snd_BUG(); | |
1349 | } | |
1350 | ||
877211f5 | 1351 | void _snd_pcm_hw_params_any(struct snd_pcm_hw_params *params) |
1da177e4 LT |
1352 | { |
1353 | unsigned int k; | |
1354 | memset(params, 0, sizeof(*params)); | |
1355 | for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) | |
1356 | _snd_pcm_hw_param_any(params, k); | |
1357 | for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) | |
1358 | _snd_pcm_hw_param_any(params, k); | |
1359 | params->info = ~0U; | |
1360 | } | |
1361 | ||
e88e8ae6 | 1362 | EXPORT_SYMBOL(_snd_pcm_hw_params_any); |
1da177e4 LT |
1363 | |
1364 | /** | |
1c85cc64 | 1365 | * snd_pcm_hw_param_value - return @params field @var value |
df8db936 TI |
1366 | * @params: the hw_params instance |
1367 | * @var: parameter to retrieve | |
1c85cc64 | 1368 | * @dir: pointer to the direction (-1,0,1) or %NULL |
1da177e4 | 1369 | * |
1c85cc64 RD |
1370 | * Return the value for field @var if it's fixed in configuration space |
1371 | * defined by @params. Return -%EINVAL otherwise. | |
1da177e4 | 1372 | */ |
e88e8ae6 TI |
1373 | int snd_pcm_hw_param_value(const struct snd_pcm_hw_params *params, |
1374 | snd_pcm_hw_param_t var, int *dir) | |
1da177e4 LT |
1375 | { |
1376 | if (hw_is_mask(var)) { | |
877211f5 | 1377 | const struct snd_mask *mask = hw_param_mask_c(params, var); |
1da177e4 LT |
1378 | if (!snd_mask_single(mask)) |
1379 | return -EINVAL; | |
1380 | if (dir) | |
1381 | *dir = 0; | |
1382 | return snd_mask_value(mask); | |
1383 | } | |
1384 | if (hw_is_interval(var)) { | |
877211f5 | 1385 | const struct snd_interval *i = hw_param_interval_c(params, var); |
1da177e4 LT |
1386 | if (!snd_interval_single(i)) |
1387 | return -EINVAL; | |
1388 | if (dir) | |
1389 | *dir = i->openmin; | |
1390 | return snd_interval_value(i); | |
1391 | } | |
1da177e4 LT |
1392 | return -EINVAL; |
1393 | } | |
1394 | ||
e88e8ae6 | 1395 | EXPORT_SYMBOL(snd_pcm_hw_param_value); |
1da177e4 | 1396 | |
877211f5 | 1397 | void _snd_pcm_hw_param_setempty(struct snd_pcm_hw_params *params, |
1da177e4 LT |
1398 | snd_pcm_hw_param_t var) |
1399 | { | |
1400 | if (hw_is_mask(var)) { | |
1401 | snd_mask_none(hw_param_mask(params, var)); | |
1402 | params->cmask |= 1 << var; | |
1403 | params->rmask |= 1 << var; | |
1404 | } else if (hw_is_interval(var)) { | |
1405 | snd_interval_none(hw_param_interval(params, var)); | |
1406 | params->cmask |= 1 << var; | |
1407 | params->rmask |= 1 << var; | |
1408 | } else { | |
1409 | snd_BUG(); | |
1410 | } | |
1411 | } | |
1412 | ||
e88e8ae6 | 1413 | EXPORT_SYMBOL(_snd_pcm_hw_param_setempty); |
1da177e4 | 1414 | |
877211f5 | 1415 | static int _snd_pcm_hw_param_first(struct snd_pcm_hw_params *params, |
123992f7 | 1416 | snd_pcm_hw_param_t var) |
1da177e4 LT |
1417 | { |
1418 | int changed; | |
1419 | if (hw_is_mask(var)) | |
1420 | changed = snd_mask_refine_first(hw_param_mask(params, var)); | |
1421 | else if (hw_is_interval(var)) | |
1422 | changed = snd_interval_refine_first(hw_param_interval(params, var)); | |
2f4ca8e5 | 1423 | else |
1da177e4 | 1424 | return -EINVAL; |
1da177e4 LT |
1425 | if (changed) { |
1426 | params->cmask |= 1 << var; | |
1427 | params->rmask |= 1 << var; | |
1428 | } | |
1429 | return changed; | |
1430 | } | |
1431 | ||
1432 | ||
1433 | /** | |
1c85cc64 | 1434 | * snd_pcm_hw_param_first - refine config space and return minimum value |
df8db936 TI |
1435 | * @pcm: PCM instance |
1436 | * @params: the hw_params instance | |
1437 | * @var: parameter to retrieve | |
1c85cc64 | 1438 | * @dir: pointer to the direction (-1,0,1) or %NULL |
1da177e4 | 1439 | * |
1c85cc64 | 1440 | * Inside configuration space defined by @params remove from @var all |
1da177e4 LT |
1441 | * values > minimum. Reduce configuration space accordingly. |
1442 | * Return the minimum. | |
1443 | */ | |
e88e8ae6 TI |
1444 | int snd_pcm_hw_param_first(struct snd_pcm_substream *pcm, |
1445 | struct snd_pcm_hw_params *params, | |
1446 | snd_pcm_hw_param_t var, int *dir) | |
1da177e4 LT |
1447 | { |
1448 | int changed = _snd_pcm_hw_param_first(params, var); | |
1449 | if (changed < 0) | |
1450 | return changed; | |
1451 | if (params->rmask) { | |
1452 | int err = snd_pcm_hw_refine(pcm, params); | |
7eaa943c TI |
1453 | if (snd_BUG_ON(err < 0)) |
1454 | return err; | |
1da177e4 LT |
1455 | } |
1456 | return snd_pcm_hw_param_value(params, var, dir); | |
1457 | } | |
1458 | ||
e88e8ae6 TI |
1459 | EXPORT_SYMBOL(snd_pcm_hw_param_first); |
1460 | ||
877211f5 | 1461 | static int _snd_pcm_hw_param_last(struct snd_pcm_hw_params *params, |
123992f7 | 1462 | snd_pcm_hw_param_t var) |
1da177e4 LT |
1463 | { |
1464 | int changed; | |
1465 | if (hw_is_mask(var)) | |
1466 | changed = snd_mask_refine_last(hw_param_mask(params, var)); | |
1467 | else if (hw_is_interval(var)) | |
1468 | changed = snd_interval_refine_last(hw_param_interval(params, var)); | |
2f4ca8e5 | 1469 | else |
1da177e4 | 1470 | return -EINVAL; |
1da177e4 LT |
1471 | if (changed) { |
1472 | params->cmask |= 1 << var; | |
1473 | params->rmask |= 1 << var; | |
1474 | } | |
1475 | return changed; | |
1476 | } | |
1477 | ||
1478 | ||
1479 | /** | |
1c85cc64 | 1480 | * snd_pcm_hw_param_last - refine config space and return maximum value |
df8db936 TI |
1481 | * @pcm: PCM instance |
1482 | * @params: the hw_params instance | |
1483 | * @var: parameter to retrieve | |
1c85cc64 | 1484 | * @dir: pointer to the direction (-1,0,1) or %NULL |
1da177e4 | 1485 | * |
1c85cc64 | 1486 | * Inside configuration space defined by @params remove from @var all |
1da177e4 LT |
1487 | * values < maximum. Reduce configuration space accordingly. |
1488 | * Return the maximum. | |
1489 | */ | |
e88e8ae6 TI |
1490 | int snd_pcm_hw_param_last(struct snd_pcm_substream *pcm, |
1491 | struct snd_pcm_hw_params *params, | |
1492 | snd_pcm_hw_param_t var, int *dir) | |
1da177e4 LT |
1493 | { |
1494 | int changed = _snd_pcm_hw_param_last(params, var); | |
1495 | if (changed < 0) | |
1496 | return changed; | |
1497 | if (params->rmask) { | |
1498 | int err = snd_pcm_hw_refine(pcm, params); | |
7eaa943c TI |
1499 | if (snd_BUG_ON(err < 0)) |
1500 | return err; | |
1da177e4 LT |
1501 | } |
1502 | return snd_pcm_hw_param_value(params, var, dir); | |
1503 | } | |
1504 | ||
e88e8ae6 | 1505 | EXPORT_SYMBOL(snd_pcm_hw_param_last); |
1da177e4 LT |
1506 | |
1507 | /** | |
1c85cc64 | 1508 | * snd_pcm_hw_param_choose - choose a configuration defined by @params |
df8db936 TI |
1509 | * @pcm: PCM instance |
1510 | * @params: the hw_params instance | |
1da177e4 | 1511 | * |
1c85cc64 | 1512 | * Choose one configuration from configuration space defined by @params. |
1da177e4 LT |
1513 | * The configuration chosen is that obtained fixing in this order: |
1514 | * first access, first format, first subformat, min channels, | |
1515 | * min rate, min period time, max buffer size, min tick time | |
1516 | */ | |
2f4ca8e5 TI |
1517 | int snd_pcm_hw_params_choose(struct snd_pcm_substream *pcm, |
1518 | struct snd_pcm_hw_params *params) | |
1da177e4 | 1519 | { |
2f4ca8e5 TI |
1520 | static int vars[] = { |
1521 | SNDRV_PCM_HW_PARAM_ACCESS, | |
1522 | SNDRV_PCM_HW_PARAM_FORMAT, | |
1523 | SNDRV_PCM_HW_PARAM_SUBFORMAT, | |
1524 | SNDRV_PCM_HW_PARAM_CHANNELS, | |
1525 | SNDRV_PCM_HW_PARAM_RATE, | |
1526 | SNDRV_PCM_HW_PARAM_PERIOD_TIME, | |
1527 | SNDRV_PCM_HW_PARAM_BUFFER_SIZE, | |
1528 | SNDRV_PCM_HW_PARAM_TICK_TIME, | |
1529 | -1 | |
1530 | }; | |
1531 | int err, *v; | |
1da177e4 | 1532 | |
2f4ca8e5 TI |
1533 | for (v = vars; *v != -1; v++) { |
1534 | if (*v != SNDRV_PCM_HW_PARAM_BUFFER_SIZE) | |
1535 | err = snd_pcm_hw_param_first(pcm, params, *v, NULL); | |
1536 | else | |
1537 | err = snd_pcm_hw_param_last(pcm, params, *v, NULL); | |
7eaa943c TI |
1538 | if (snd_BUG_ON(err < 0)) |
1539 | return err; | |
2f4ca8e5 | 1540 | } |
1da177e4 LT |
1541 | return 0; |
1542 | } | |
1543 | ||
877211f5 | 1544 | static int snd_pcm_lib_ioctl_reset(struct snd_pcm_substream *substream, |
1da177e4 LT |
1545 | void *arg) |
1546 | { | |
877211f5 | 1547 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1548 | unsigned long flags; |
1549 | snd_pcm_stream_lock_irqsave(substream, flags); | |
1550 | if (snd_pcm_running(substream) && | |
1551 | snd_pcm_update_hw_ptr(substream) >= 0) | |
1552 | runtime->status->hw_ptr %= runtime->buffer_size; | |
1553 | else | |
1554 | runtime->status->hw_ptr = 0; | |
1555 | snd_pcm_stream_unlock_irqrestore(substream, flags); | |
1556 | return 0; | |
1557 | } | |
1558 | ||
877211f5 | 1559 | static int snd_pcm_lib_ioctl_channel_info(struct snd_pcm_substream *substream, |
1da177e4 LT |
1560 | void *arg) |
1561 | { | |
877211f5 TI |
1562 | struct snd_pcm_channel_info *info = arg; |
1563 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1da177e4 LT |
1564 | int width; |
1565 | if (!(runtime->info & SNDRV_PCM_INFO_MMAP)) { | |
1566 | info->offset = -1; | |
1567 | return 0; | |
1568 | } | |
1569 | width = snd_pcm_format_physical_width(runtime->format); | |
1570 | if (width < 0) | |
1571 | return width; | |
1572 | info->offset = 0; | |
1573 | switch (runtime->access) { | |
1574 | case SNDRV_PCM_ACCESS_MMAP_INTERLEAVED: | |
1575 | case SNDRV_PCM_ACCESS_RW_INTERLEAVED: | |
1576 | info->first = info->channel * width; | |
1577 | info->step = runtime->channels * width; | |
1578 | break; | |
1579 | case SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED: | |
1580 | case SNDRV_PCM_ACCESS_RW_NONINTERLEAVED: | |
1581 | { | |
1582 | size_t size = runtime->dma_bytes / runtime->channels; | |
1583 | info->first = info->channel * size * 8; | |
1584 | info->step = width; | |
1585 | break; | |
1586 | } | |
1587 | default: | |
1588 | snd_BUG(); | |
1589 | break; | |
1590 | } | |
1591 | return 0; | |
1592 | } | |
1593 | ||
8bea869c JK |
1594 | static int snd_pcm_lib_ioctl_fifo_size(struct snd_pcm_substream *substream, |
1595 | void *arg) | |
1596 | { | |
1597 | struct snd_pcm_hw_params *params = arg; | |
1598 | snd_pcm_format_t format; | |
1599 | int channels, width; | |
1600 | ||
1601 | params->fifo_size = substream->runtime->hw.fifo_size; | |
1602 | if (!(substream->runtime->hw.info & SNDRV_PCM_INFO_FIFO_IN_FRAMES)) { | |
1603 | format = params_format(params); | |
1604 | channels = params_channels(params); | |
1605 | width = snd_pcm_format_physical_width(format); | |
1606 | params->fifo_size /= width * channels; | |
1607 | } | |
1608 | return 0; | |
1609 | } | |
1610 | ||
1da177e4 LT |
1611 | /** |
1612 | * snd_pcm_lib_ioctl - a generic PCM ioctl callback | |
1613 | * @substream: the pcm substream instance | |
1614 | * @cmd: ioctl command | |
1615 | * @arg: ioctl argument | |
1616 | * | |
1617 | * Processes the generic ioctl commands for PCM. | |
1618 | * Can be passed as the ioctl callback for PCM ops. | |
1619 | * | |
1620 | * Returns zero if successful, or a negative error code on failure. | |
1621 | */ | |
877211f5 | 1622 | int snd_pcm_lib_ioctl(struct snd_pcm_substream *substream, |
1da177e4 LT |
1623 | unsigned int cmd, void *arg) |
1624 | { | |
1625 | switch (cmd) { | |
1626 | case SNDRV_PCM_IOCTL1_INFO: | |
1627 | return 0; | |
1628 | case SNDRV_PCM_IOCTL1_RESET: | |
1629 | return snd_pcm_lib_ioctl_reset(substream, arg); | |
1630 | case SNDRV_PCM_IOCTL1_CHANNEL_INFO: | |
1631 | return snd_pcm_lib_ioctl_channel_info(substream, arg); | |
8bea869c JK |
1632 | case SNDRV_PCM_IOCTL1_FIFO_SIZE: |
1633 | return snd_pcm_lib_ioctl_fifo_size(substream, arg); | |
1da177e4 LT |
1634 | } |
1635 | return -ENXIO; | |
1636 | } | |
1637 | ||
e88e8ae6 TI |
1638 | EXPORT_SYMBOL(snd_pcm_lib_ioctl); |
1639 | ||
1da177e4 LT |
1640 | /** |
1641 | * snd_pcm_period_elapsed - update the pcm status for the next period | |
1642 | * @substream: the pcm substream instance | |
1643 | * | |
1644 | * This function is called from the interrupt handler when the | |
1645 | * PCM has processed the period size. It will update the current | |
31e8960b | 1646 | * pointer, wake up sleepers, etc. |
1da177e4 LT |
1647 | * |
1648 | * Even if more than one periods have elapsed since the last call, you | |
1649 | * have to call this only once. | |
1650 | */ | |
877211f5 | 1651 | void snd_pcm_period_elapsed(struct snd_pcm_substream *substream) |
1da177e4 | 1652 | { |
877211f5 | 1653 | struct snd_pcm_runtime *runtime; |
1da177e4 LT |
1654 | unsigned long flags; |
1655 | ||
7eaa943c TI |
1656 | if (PCM_RUNTIME_CHECK(substream)) |
1657 | return; | |
1da177e4 | 1658 | runtime = substream->runtime; |
1da177e4 LT |
1659 | |
1660 | if (runtime->transfer_ack_begin) | |
1661 | runtime->transfer_ack_begin(substream); | |
1662 | ||
1663 | snd_pcm_stream_lock_irqsave(substream, flags); | |
1664 | if (!snd_pcm_running(substream) || | |
1665 | snd_pcm_update_hw_ptr_interrupt(substream) < 0) | |
1666 | goto _end; | |
1667 | ||
1668 | if (substream->timer_running) | |
1669 | snd_timer_interrupt(substream->timer, 1); | |
1da177e4 LT |
1670 | _end: |
1671 | snd_pcm_stream_unlock_irqrestore(substream, flags); | |
1672 | if (runtime->transfer_ack_end) | |
1673 | runtime->transfer_ack_end(substream); | |
1674 | kill_fasync(&runtime->fasync, SIGIO, POLL_IN); | |
1675 | } | |
1676 | ||
e88e8ae6 TI |
1677 | EXPORT_SYMBOL(snd_pcm_period_elapsed); |
1678 | ||
13075510 TI |
1679 | /* |
1680 | * Wait until avail_min data becomes available | |
1681 | * Returns a negative error code if any error occurs during operation. | |
1682 | * The available space is stored on availp. When err = 0 and avail = 0 | |
1683 | * on the capture stream, it indicates the stream is in DRAINING state. | |
1684 | */ | |
1685 | static int wait_for_avail_min(struct snd_pcm_substream *substream, | |
1686 | snd_pcm_uframes_t *availp) | |
1687 | { | |
1688 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1689 | int is_playback = substream->stream == SNDRV_PCM_STREAM_PLAYBACK; | |
1690 | wait_queue_t wait; | |
1691 | int err = 0; | |
1692 | snd_pcm_uframes_t avail = 0; | |
1693 | long tout; | |
1694 | ||
1695 | init_waitqueue_entry(&wait, current); | |
1696 | add_wait_queue(&runtime->sleep, &wait); | |
1697 | for (;;) { | |
1698 | if (signal_pending(current)) { | |
1699 | err = -ERESTARTSYS; | |
1700 | break; | |
1701 | } | |
1702 | set_current_state(TASK_INTERRUPTIBLE); | |
1703 | snd_pcm_stream_unlock_irq(substream); | |
1704 | tout = schedule_timeout(msecs_to_jiffies(10000)); | |
1705 | snd_pcm_stream_lock_irq(substream); | |
1706 | switch (runtime->status->state) { | |
1707 | case SNDRV_PCM_STATE_SUSPENDED: | |
1708 | err = -ESTRPIPE; | |
1709 | goto _endloop; | |
1710 | case SNDRV_PCM_STATE_XRUN: | |
1711 | err = -EPIPE; | |
1712 | goto _endloop; | |
1713 | case SNDRV_PCM_STATE_DRAINING: | |
1714 | if (is_playback) | |
1715 | err = -EPIPE; | |
1716 | else | |
1717 | avail = 0; /* indicate draining */ | |
1718 | goto _endloop; | |
1719 | case SNDRV_PCM_STATE_OPEN: | |
1720 | case SNDRV_PCM_STATE_SETUP: | |
1721 | case SNDRV_PCM_STATE_DISCONNECTED: | |
1722 | err = -EBADFD; | |
1723 | goto _endloop; | |
1724 | } | |
1725 | if (!tout) { | |
1726 | snd_printd("%s write error (DMA or IRQ trouble?)\n", | |
1727 | is_playback ? "playback" : "capture"); | |
1728 | err = -EIO; | |
1729 | break; | |
1730 | } | |
1731 | if (is_playback) | |
1732 | avail = snd_pcm_playback_avail(runtime); | |
1733 | else | |
1734 | avail = snd_pcm_capture_avail(runtime); | |
1735 | if (avail >= runtime->control->avail_min) | |
1736 | break; | |
1737 | } | |
1738 | _endloop: | |
1739 | remove_wait_queue(&runtime->sleep, &wait); | |
1740 | *availp = avail; | |
1741 | return err; | |
1742 | } | |
1743 | ||
877211f5 | 1744 | static int snd_pcm_lib_write_transfer(struct snd_pcm_substream *substream, |
1da177e4 LT |
1745 | unsigned int hwoff, |
1746 | unsigned long data, unsigned int off, | |
1747 | snd_pcm_uframes_t frames) | |
1748 | { | |
877211f5 | 1749 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1750 | int err; |
1751 | char __user *buf = (char __user *) data + frames_to_bytes(runtime, off); | |
1752 | if (substream->ops->copy) { | |
1753 | if ((err = substream->ops->copy(substream, -1, hwoff, buf, frames)) < 0) | |
1754 | return err; | |
1755 | } else { | |
1756 | char *hwbuf = runtime->dma_area + frames_to_bytes(runtime, hwoff); | |
1da177e4 LT |
1757 | if (copy_from_user(hwbuf, buf, frames_to_bytes(runtime, frames))) |
1758 | return -EFAULT; | |
1759 | } | |
1760 | return 0; | |
1761 | } | |
1762 | ||
877211f5 | 1763 | typedef int (*transfer_f)(struct snd_pcm_substream *substream, unsigned int hwoff, |
1da177e4 LT |
1764 | unsigned long data, unsigned int off, |
1765 | snd_pcm_uframes_t size); | |
1766 | ||
877211f5 | 1767 | static snd_pcm_sframes_t snd_pcm_lib_write1(struct snd_pcm_substream *substream, |
1da177e4 LT |
1768 | unsigned long data, |
1769 | snd_pcm_uframes_t size, | |
1770 | int nonblock, | |
1771 | transfer_f transfer) | |
1772 | { | |
877211f5 | 1773 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1774 | snd_pcm_uframes_t xfer = 0; |
1775 | snd_pcm_uframes_t offset = 0; | |
1776 | int err = 0; | |
1777 | ||
1778 | if (size == 0) | |
1779 | return 0; | |
1da177e4 LT |
1780 | |
1781 | snd_pcm_stream_lock_irq(substream); | |
1782 | switch (runtime->status->state) { | |
1783 | case SNDRV_PCM_STATE_PREPARED: | |
1784 | case SNDRV_PCM_STATE_RUNNING: | |
1785 | case SNDRV_PCM_STATE_PAUSED: | |
1786 | break; | |
1787 | case SNDRV_PCM_STATE_XRUN: | |
1788 | err = -EPIPE; | |
1789 | goto _end_unlock; | |
1790 | case SNDRV_PCM_STATE_SUSPENDED: | |
1791 | err = -ESTRPIPE; | |
1792 | goto _end_unlock; | |
1793 | default: | |
1794 | err = -EBADFD; | |
1795 | goto _end_unlock; | |
1796 | } | |
1797 | ||
1798 | while (size > 0) { | |
1799 | snd_pcm_uframes_t frames, appl_ptr, appl_ofs; | |
1800 | snd_pcm_uframes_t avail; | |
1801 | snd_pcm_uframes_t cont; | |
31e8960b | 1802 | if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) |
1da177e4 LT |
1803 | snd_pcm_update_hw_ptr(substream); |
1804 | avail = snd_pcm_playback_avail(runtime); | |
13075510 | 1805 | if (!avail) { |
1da177e4 LT |
1806 | if (nonblock) { |
1807 | err = -EAGAIN; | |
1808 | goto _end_unlock; | |
1809 | } | |
13075510 TI |
1810 | err = wait_for_avail_min(substream, &avail); |
1811 | if (err < 0) | |
443feb88 | 1812 | goto _end_unlock; |
1da177e4 | 1813 | } |
1da177e4 LT |
1814 | frames = size > avail ? avail : size; |
1815 | cont = runtime->buffer_size - runtime->control->appl_ptr % runtime->buffer_size; | |
1816 | if (frames > cont) | |
1817 | frames = cont; | |
7eaa943c TI |
1818 | if (snd_BUG_ON(!frames)) { |
1819 | snd_pcm_stream_unlock_irq(substream); | |
1820 | return -EINVAL; | |
1821 | } | |
1da177e4 LT |
1822 | appl_ptr = runtime->control->appl_ptr; |
1823 | appl_ofs = appl_ptr % runtime->buffer_size; | |
1824 | snd_pcm_stream_unlock_irq(substream); | |
1825 | if ((err = transfer(substream, appl_ofs, data, offset, frames)) < 0) | |
1826 | goto _end; | |
1827 | snd_pcm_stream_lock_irq(substream); | |
1828 | switch (runtime->status->state) { | |
1829 | case SNDRV_PCM_STATE_XRUN: | |
1830 | err = -EPIPE; | |
1831 | goto _end_unlock; | |
1832 | case SNDRV_PCM_STATE_SUSPENDED: | |
1833 | err = -ESTRPIPE; | |
1834 | goto _end_unlock; | |
1835 | default: | |
1836 | break; | |
1837 | } | |
1838 | appl_ptr += frames; | |
1839 | if (appl_ptr >= runtime->boundary) | |
1840 | appl_ptr -= runtime->boundary; | |
1841 | runtime->control->appl_ptr = appl_ptr; | |
1842 | if (substream->ops->ack) | |
1843 | substream->ops->ack(substream); | |
1844 | ||
1845 | offset += frames; | |
1846 | size -= frames; | |
1847 | xfer += frames; | |
1848 | if (runtime->status->state == SNDRV_PCM_STATE_PREPARED && | |
1849 | snd_pcm_playback_hw_avail(runtime) >= (snd_pcm_sframes_t)runtime->start_threshold) { | |
1850 | err = snd_pcm_start(substream); | |
1851 | if (err < 0) | |
1852 | goto _end_unlock; | |
1853 | } | |
1da177e4 LT |
1854 | } |
1855 | _end_unlock: | |
1856 | snd_pcm_stream_unlock_irq(substream); | |
1857 | _end: | |
1858 | return xfer > 0 ? (snd_pcm_sframes_t)xfer : err; | |
1859 | } | |
1860 | ||
7eaa943c TI |
1861 | /* sanity-check for read/write methods */ |
1862 | static int pcm_sanity_check(struct snd_pcm_substream *substream) | |
1da177e4 | 1863 | { |
877211f5 | 1864 | struct snd_pcm_runtime *runtime; |
7eaa943c TI |
1865 | if (PCM_RUNTIME_CHECK(substream)) |
1866 | return -ENXIO; | |
1da177e4 | 1867 | runtime = substream->runtime; |
7eaa943c TI |
1868 | if (snd_BUG_ON(!substream->ops->copy && !runtime->dma_area)) |
1869 | return -EINVAL; | |
1da177e4 LT |
1870 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) |
1871 | return -EBADFD; | |
7eaa943c TI |
1872 | return 0; |
1873 | } | |
1874 | ||
1875 | snd_pcm_sframes_t snd_pcm_lib_write(struct snd_pcm_substream *substream, const void __user *buf, snd_pcm_uframes_t size) | |
1876 | { | |
1877 | struct snd_pcm_runtime *runtime; | |
1878 | int nonblock; | |
1879 | int err; | |
1da177e4 | 1880 | |
7eaa943c TI |
1881 | err = pcm_sanity_check(substream); |
1882 | if (err < 0) | |
1883 | return err; | |
1884 | runtime = substream->runtime; | |
0df63e44 | 1885 | nonblock = !!(substream->f_flags & O_NONBLOCK); |
1da177e4 LT |
1886 | |
1887 | if (runtime->access != SNDRV_PCM_ACCESS_RW_INTERLEAVED && | |
1888 | runtime->channels > 1) | |
1889 | return -EINVAL; | |
1890 | return snd_pcm_lib_write1(substream, (unsigned long)buf, size, nonblock, | |
1891 | snd_pcm_lib_write_transfer); | |
1892 | } | |
1893 | ||
e88e8ae6 TI |
1894 | EXPORT_SYMBOL(snd_pcm_lib_write); |
1895 | ||
877211f5 | 1896 | static int snd_pcm_lib_writev_transfer(struct snd_pcm_substream *substream, |
1da177e4 LT |
1897 | unsigned int hwoff, |
1898 | unsigned long data, unsigned int off, | |
1899 | snd_pcm_uframes_t frames) | |
1900 | { | |
877211f5 | 1901 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1902 | int err; |
1903 | void __user **bufs = (void __user **)data; | |
1904 | int channels = runtime->channels; | |
1905 | int c; | |
1906 | if (substream->ops->copy) { | |
7eaa943c TI |
1907 | if (snd_BUG_ON(!substream->ops->silence)) |
1908 | return -EINVAL; | |
1da177e4 LT |
1909 | for (c = 0; c < channels; ++c, ++bufs) { |
1910 | if (*bufs == NULL) { | |
1911 | if ((err = substream->ops->silence(substream, c, hwoff, frames)) < 0) | |
1912 | return err; | |
1913 | } else { | |
1914 | char __user *buf = *bufs + samples_to_bytes(runtime, off); | |
1915 | if ((err = substream->ops->copy(substream, c, hwoff, buf, frames)) < 0) | |
1916 | return err; | |
1917 | } | |
1918 | } | |
1919 | } else { | |
1920 | /* default transfer behaviour */ | |
1921 | size_t dma_csize = runtime->dma_bytes / channels; | |
1da177e4 LT |
1922 | for (c = 0; c < channels; ++c, ++bufs) { |
1923 | char *hwbuf = runtime->dma_area + (c * dma_csize) + samples_to_bytes(runtime, hwoff); | |
1924 | if (*bufs == NULL) { | |
1925 | snd_pcm_format_set_silence(runtime->format, hwbuf, frames); | |
1926 | } else { | |
1927 | char __user *buf = *bufs + samples_to_bytes(runtime, off); | |
1928 | if (copy_from_user(hwbuf, buf, samples_to_bytes(runtime, frames))) | |
1929 | return -EFAULT; | |
1930 | } | |
1931 | } | |
1932 | } | |
1933 | return 0; | |
1934 | } | |
1935 | ||
877211f5 | 1936 | snd_pcm_sframes_t snd_pcm_lib_writev(struct snd_pcm_substream *substream, |
1da177e4 LT |
1937 | void __user **bufs, |
1938 | snd_pcm_uframes_t frames) | |
1939 | { | |
877211f5 | 1940 | struct snd_pcm_runtime *runtime; |
1da177e4 | 1941 | int nonblock; |
7eaa943c | 1942 | int err; |
1da177e4 | 1943 | |
7eaa943c TI |
1944 | err = pcm_sanity_check(substream); |
1945 | if (err < 0) | |
1946 | return err; | |
1da177e4 | 1947 | runtime = substream->runtime; |
0df63e44 | 1948 | nonblock = !!(substream->f_flags & O_NONBLOCK); |
1da177e4 LT |
1949 | |
1950 | if (runtime->access != SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) | |
1951 | return -EINVAL; | |
1952 | return snd_pcm_lib_write1(substream, (unsigned long)bufs, frames, | |
1953 | nonblock, snd_pcm_lib_writev_transfer); | |
1954 | } | |
1955 | ||
e88e8ae6 TI |
1956 | EXPORT_SYMBOL(snd_pcm_lib_writev); |
1957 | ||
877211f5 | 1958 | static int snd_pcm_lib_read_transfer(struct snd_pcm_substream *substream, |
1da177e4 LT |
1959 | unsigned int hwoff, |
1960 | unsigned long data, unsigned int off, | |
1961 | snd_pcm_uframes_t frames) | |
1962 | { | |
877211f5 | 1963 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1964 | int err; |
1965 | char __user *buf = (char __user *) data + frames_to_bytes(runtime, off); | |
1966 | if (substream->ops->copy) { | |
1967 | if ((err = substream->ops->copy(substream, -1, hwoff, buf, frames)) < 0) | |
1968 | return err; | |
1969 | } else { | |
1970 | char *hwbuf = runtime->dma_area + frames_to_bytes(runtime, hwoff); | |
1da177e4 LT |
1971 | if (copy_to_user(buf, hwbuf, frames_to_bytes(runtime, frames))) |
1972 | return -EFAULT; | |
1973 | } | |
1974 | return 0; | |
1975 | } | |
1976 | ||
877211f5 | 1977 | static snd_pcm_sframes_t snd_pcm_lib_read1(struct snd_pcm_substream *substream, |
1da177e4 LT |
1978 | unsigned long data, |
1979 | snd_pcm_uframes_t size, | |
1980 | int nonblock, | |
1981 | transfer_f transfer) | |
1982 | { | |
877211f5 | 1983 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1984 | snd_pcm_uframes_t xfer = 0; |
1985 | snd_pcm_uframes_t offset = 0; | |
1986 | int err = 0; | |
1987 | ||
1988 | if (size == 0) | |
1989 | return 0; | |
1da177e4 LT |
1990 | |
1991 | snd_pcm_stream_lock_irq(substream); | |
1992 | switch (runtime->status->state) { | |
1993 | case SNDRV_PCM_STATE_PREPARED: | |
1994 | if (size >= runtime->start_threshold) { | |
1995 | err = snd_pcm_start(substream); | |
1996 | if (err < 0) | |
1997 | goto _end_unlock; | |
1998 | } | |
1999 | break; | |
2000 | case SNDRV_PCM_STATE_DRAINING: | |
2001 | case SNDRV_PCM_STATE_RUNNING: | |
2002 | case SNDRV_PCM_STATE_PAUSED: | |
2003 | break; | |
2004 | case SNDRV_PCM_STATE_XRUN: | |
2005 | err = -EPIPE; | |
2006 | goto _end_unlock; | |
2007 | case SNDRV_PCM_STATE_SUSPENDED: | |
2008 | err = -ESTRPIPE; | |
2009 | goto _end_unlock; | |
2010 | default: | |
2011 | err = -EBADFD; | |
2012 | goto _end_unlock; | |
2013 | } | |
2014 | ||
2015 | while (size > 0) { | |
2016 | snd_pcm_uframes_t frames, appl_ptr, appl_ofs; | |
2017 | snd_pcm_uframes_t avail; | |
2018 | snd_pcm_uframes_t cont; | |
31e8960b | 2019 | if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) |
1da177e4 | 2020 | snd_pcm_update_hw_ptr(substream); |
1da177e4 | 2021 | avail = snd_pcm_capture_avail(runtime); |
13075510 TI |
2022 | if (!avail) { |
2023 | if (runtime->status->state == | |
2024 | SNDRV_PCM_STATE_DRAINING) { | |
2025 | snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP); | |
1da177e4 LT |
2026 | goto _end_unlock; |
2027 | } | |
1da177e4 LT |
2028 | if (nonblock) { |
2029 | err = -EAGAIN; | |
2030 | goto _end_unlock; | |
2031 | } | |
13075510 TI |
2032 | err = wait_for_avail_min(substream, &avail); |
2033 | if (err < 0) | |
443feb88 | 2034 | goto _end_unlock; |
13075510 TI |
2035 | if (!avail) |
2036 | continue; /* draining */ | |
1da177e4 | 2037 | } |
1da177e4 LT |
2038 | frames = size > avail ? avail : size; |
2039 | cont = runtime->buffer_size - runtime->control->appl_ptr % runtime->buffer_size; | |
2040 | if (frames > cont) | |
2041 | frames = cont; | |
7eaa943c TI |
2042 | if (snd_BUG_ON(!frames)) { |
2043 | snd_pcm_stream_unlock_irq(substream); | |
2044 | return -EINVAL; | |
2045 | } | |
1da177e4 LT |
2046 | appl_ptr = runtime->control->appl_ptr; |
2047 | appl_ofs = appl_ptr % runtime->buffer_size; | |
2048 | snd_pcm_stream_unlock_irq(substream); | |
2049 | if ((err = transfer(substream, appl_ofs, data, offset, frames)) < 0) | |
2050 | goto _end; | |
2051 | snd_pcm_stream_lock_irq(substream); | |
2052 | switch (runtime->status->state) { | |
2053 | case SNDRV_PCM_STATE_XRUN: | |
2054 | err = -EPIPE; | |
2055 | goto _end_unlock; | |
2056 | case SNDRV_PCM_STATE_SUSPENDED: | |
2057 | err = -ESTRPIPE; | |
2058 | goto _end_unlock; | |
2059 | default: | |
2060 | break; | |
2061 | } | |
2062 | appl_ptr += frames; | |
2063 | if (appl_ptr >= runtime->boundary) | |
2064 | appl_ptr -= runtime->boundary; | |
2065 | runtime->control->appl_ptr = appl_ptr; | |
2066 | if (substream->ops->ack) | |
2067 | substream->ops->ack(substream); | |
2068 | ||
2069 | offset += frames; | |
2070 | size -= frames; | |
2071 | xfer += frames; | |
1da177e4 LT |
2072 | } |
2073 | _end_unlock: | |
2074 | snd_pcm_stream_unlock_irq(substream); | |
2075 | _end: | |
2076 | return xfer > 0 ? (snd_pcm_sframes_t)xfer : err; | |
2077 | } | |
2078 | ||
877211f5 | 2079 | snd_pcm_sframes_t snd_pcm_lib_read(struct snd_pcm_substream *substream, void __user *buf, snd_pcm_uframes_t size) |
1da177e4 | 2080 | { |
877211f5 | 2081 | struct snd_pcm_runtime *runtime; |
1da177e4 | 2082 | int nonblock; |
7eaa943c | 2083 | int err; |
1da177e4 | 2084 | |
7eaa943c TI |
2085 | err = pcm_sanity_check(substream); |
2086 | if (err < 0) | |
2087 | return err; | |
1da177e4 | 2088 | runtime = substream->runtime; |
0df63e44 | 2089 | nonblock = !!(substream->f_flags & O_NONBLOCK); |
1da177e4 LT |
2090 | if (runtime->access != SNDRV_PCM_ACCESS_RW_INTERLEAVED) |
2091 | return -EINVAL; | |
2092 | return snd_pcm_lib_read1(substream, (unsigned long)buf, size, nonblock, snd_pcm_lib_read_transfer); | |
2093 | } | |
2094 | ||
e88e8ae6 TI |
2095 | EXPORT_SYMBOL(snd_pcm_lib_read); |
2096 | ||
877211f5 | 2097 | static int snd_pcm_lib_readv_transfer(struct snd_pcm_substream *substream, |
1da177e4 LT |
2098 | unsigned int hwoff, |
2099 | unsigned long data, unsigned int off, | |
2100 | snd_pcm_uframes_t frames) | |
2101 | { | |
877211f5 | 2102 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
2103 | int err; |
2104 | void __user **bufs = (void __user **)data; | |
2105 | int channels = runtime->channels; | |
2106 | int c; | |
2107 | if (substream->ops->copy) { | |
2108 | for (c = 0; c < channels; ++c, ++bufs) { | |
2109 | char __user *buf; | |
2110 | if (*bufs == NULL) | |
2111 | continue; | |
2112 | buf = *bufs + samples_to_bytes(runtime, off); | |
2113 | if ((err = substream->ops->copy(substream, c, hwoff, buf, frames)) < 0) | |
2114 | return err; | |
2115 | } | |
2116 | } else { | |
2117 | snd_pcm_uframes_t dma_csize = runtime->dma_bytes / channels; | |
1da177e4 LT |
2118 | for (c = 0; c < channels; ++c, ++bufs) { |
2119 | char *hwbuf; | |
2120 | char __user *buf; | |
2121 | if (*bufs == NULL) | |
2122 | continue; | |
2123 | ||
2124 | hwbuf = runtime->dma_area + (c * dma_csize) + samples_to_bytes(runtime, hwoff); | |
2125 | buf = *bufs + samples_to_bytes(runtime, off); | |
2126 | if (copy_to_user(buf, hwbuf, samples_to_bytes(runtime, frames))) | |
2127 | return -EFAULT; | |
2128 | } | |
2129 | } | |
2130 | return 0; | |
2131 | } | |
2132 | ||
877211f5 | 2133 | snd_pcm_sframes_t snd_pcm_lib_readv(struct snd_pcm_substream *substream, |
1da177e4 LT |
2134 | void __user **bufs, |
2135 | snd_pcm_uframes_t frames) | |
2136 | { | |
877211f5 | 2137 | struct snd_pcm_runtime *runtime; |
1da177e4 | 2138 | int nonblock; |
7eaa943c | 2139 | int err; |
1da177e4 | 2140 | |
7eaa943c TI |
2141 | err = pcm_sanity_check(substream); |
2142 | if (err < 0) | |
2143 | return err; | |
1da177e4 | 2144 | runtime = substream->runtime; |
1da177e4 LT |
2145 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) |
2146 | return -EBADFD; | |
2147 | ||
0df63e44 | 2148 | nonblock = !!(substream->f_flags & O_NONBLOCK); |
1da177e4 LT |
2149 | if (runtime->access != SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) |
2150 | return -EINVAL; | |
2151 | return snd_pcm_lib_read1(substream, (unsigned long)bufs, frames, nonblock, snd_pcm_lib_readv_transfer); | |
2152 | } | |
2153 | ||
1da177e4 | 2154 | EXPORT_SYMBOL(snd_pcm_lib_readv); |