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> | |
25 | #include <sound/core.h> | |
26 | #include <sound/control.h> | |
27 | #include <sound/info.h> | |
28 | #include <sound/pcm.h> | |
29 | #include <sound/pcm_params.h> | |
30 | #include <sound/timer.h> | |
31 | ||
32 | /* | |
33 | * fill ring buffer with silence | |
34 | * runtime->silence_start: starting pointer to silence area | |
35 | * runtime->silence_filled: size filled with silence | |
36 | * runtime->silence_threshold: threshold from application | |
37 | * runtime->silence_size: maximal size from application | |
38 | * | |
39 | * when runtime->silence_size >= runtime->boundary - fill processed area with silence immediately | |
40 | */ | |
877211f5 | 41 | void snd_pcm_playback_silence(struct snd_pcm_substream *substream, snd_pcm_uframes_t new_hw_ptr) |
1da177e4 | 42 | { |
877211f5 | 43 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
44 | snd_pcm_uframes_t frames, ofs, transfer; |
45 | ||
46 | if (runtime->silence_size < runtime->boundary) { | |
47 | snd_pcm_sframes_t noise_dist, n; | |
48 | if (runtime->silence_start != runtime->control->appl_ptr) { | |
49 | n = runtime->control->appl_ptr - runtime->silence_start; | |
50 | if (n < 0) | |
51 | n += runtime->boundary; | |
52 | if ((snd_pcm_uframes_t)n < runtime->silence_filled) | |
53 | runtime->silence_filled -= n; | |
54 | else | |
55 | runtime->silence_filled = 0; | |
56 | runtime->silence_start = runtime->control->appl_ptr; | |
57 | } | |
235475cb | 58 | if (runtime->silence_filled >= runtime->buffer_size) |
1da177e4 | 59 | return; |
1da177e4 LT |
60 | noise_dist = snd_pcm_playback_hw_avail(runtime) + runtime->silence_filled; |
61 | if (noise_dist >= (snd_pcm_sframes_t) runtime->silence_threshold) | |
62 | return; | |
63 | frames = runtime->silence_threshold - noise_dist; | |
64 | if (frames > runtime->silence_size) | |
65 | frames = runtime->silence_size; | |
66 | } else { | |
67 | if (new_hw_ptr == ULONG_MAX) { /* initialization */ | |
68 | snd_pcm_sframes_t avail = snd_pcm_playback_hw_avail(runtime); | |
69 | runtime->silence_filled = avail > 0 ? avail : 0; | |
70 | runtime->silence_start = (runtime->status->hw_ptr + | |
71 | runtime->silence_filled) % | |
72 | runtime->boundary; | |
73 | } else { | |
74 | ofs = runtime->status->hw_ptr; | |
75 | frames = new_hw_ptr - ofs; | |
76 | if ((snd_pcm_sframes_t)frames < 0) | |
77 | frames += runtime->boundary; | |
78 | runtime->silence_filled -= frames; | |
79 | if ((snd_pcm_sframes_t)runtime->silence_filled < 0) { | |
80 | runtime->silence_filled = 0; | |
9a826ddb | 81 | runtime->silence_start = new_hw_ptr; |
1da177e4 | 82 | } else { |
9a826ddb | 83 | runtime->silence_start = ofs; |
1da177e4 | 84 | } |
1da177e4 LT |
85 | } |
86 | frames = runtime->buffer_size - runtime->silence_filled; | |
87 | } | |
7eaa943c TI |
88 | if (snd_BUG_ON(frames > runtime->buffer_size)) |
89 | return; | |
1da177e4 LT |
90 | if (frames == 0) |
91 | return; | |
9a826ddb | 92 | ofs = runtime->silence_start % runtime->buffer_size; |
1da177e4 LT |
93 | while (frames > 0) { |
94 | transfer = ofs + frames > runtime->buffer_size ? runtime->buffer_size - ofs : frames; | |
95 | if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED || | |
96 | runtime->access == SNDRV_PCM_ACCESS_MMAP_INTERLEAVED) { | |
97 | if (substream->ops->silence) { | |
98 | int err; | |
99 | err = substream->ops->silence(substream, -1, ofs, transfer); | |
7eaa943c | 100 | snd_BUG_ON(err < 0); |
1da177e4 LT |
101 | } else { |
102 | char *hwbuf = runtime->dma_area + frames_to_bytes(runtime, ofs); | |
103 | snd_pcm_format_set_silence(runtime->format, hwbuf, transfer * runtime->channels); | |
104 | } | |
105 | } else { | |
106 | unsigned int c; | |
107 | unsigned int channels = runtime->channels; | |
108 | if (substream->ops->silence) { | |
109 | for (c = 0; c < channels; ++c) { | |
110 | int err; | |
111 | err = substream->ops->silence(substream, c, ofs, transfer); | |
7eaa943c | 112 | snd_BUG_ON(err < 0); |
1da177e4 LT |
113 | } |
114 | } else { | |
115 | size_t dma_csize = runtime->dma_bytes / channels; | |
116 | for (c = 0; c < channels; ++c) { | |
117 | char *hwbuf = runtime->dma_area + (c * dma_csize) + samples_to_bytes(runtime, ofs); | |
118 | snd_pcm_format_set_silence(runtime->format, hwbuf, transfer); | |
119 | } | |
120 | } | |
121 | } | |
122 | runtime->silence_filled += transfer; | |
123 | frames -= transfer; | |
124 | ofs = 0; | |
125 | } | |
126 | } | |
127 | ||
ed3da3d9 | 128 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
c62a01ad | 129 | #define xrun_debug(substream, mask) ((substream)->pstr->xrun_debug & (mask)) |
ed3da3d9 | 130 | #else |
c62a01ad | 131 | #define xrun_debug(substream, mask) 0 |
ed3da3d9 TI |
132 | #endif |
133 | ||
c62a01ad JK |
134 | #define dump_stack_on_xrun(substream) do { \ |
135 | if (xrun_debug(substream, 2)) \ | |
136 | dump_stack(); \ | |
ed3da3d9 TI |
137 | } while (0) |
138 | ||
877211f5 | 139 | static void xrun(struct snd_pcm_substream *substream) |
1da177e4 | 140 | { |
13f040f9 JK |
141 | struct snd_pcm_runtime *runtime = substream->runtime; |
142 | ||
143 | if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) | |
144 | snd_pcm_gettime(runtime, (struct timespec *)&runtime->status->tstamp); | |
1da177e4 | 145 | snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN); |
c62a01ad | 146 | if (xrun_debug(substream, 1)) { |
1da177e4 LT |
147 | snd_printd(KERN_DEBUG "XRUN: pcmC%dD%d%c\n", |
148 | substream->pcm->card->number, | |
149 | substream->pcm->device, | |
150 | substream->stream ? 'c' : 'p'); | |
ed3da3d9 | 151 | dump_stack_on_xrun(substream); |
1da177e4 | 152 | } |
1da177e4 LT |
153 | } |
154 | ||
98204646 TI |
155 | static snd_pcm_uframes_t |
156 | snd_pcm_update_hw_ptr_pos(struct snd_pcm_substream *substream, | |
157 | struct snd_pcm_runtime *runtime) | |
1da177e4 LT |
158 | { |
159 | snd_pcm_uframes_t pos; | |
160 | ||
161 | pos = substream->ops->pointer(substream); | |
162 | if (pos == SNDRV_PCM_POS_XRUN) | |
163 | return pos; /* XRUN */ | |
1da177e4 | 164 | if (pos >= runtime->buffer_size) { |
5f513e11 TI |
165 | if (printk_ratelimit()) { |
166 | snd_printd(KERN_ERR "BUG: stream = %i, pos = 0x%lx, " | |
167 | "buffer size = 0x%lx, period size = 0x%lx\n", | |
168 | substream->stream, pos, runtime->buffer_size, | |
169 | runtime->period_size); | |
170 | } | |
171 | pos = 0; | |
7c22f1aa | 172 | } |
1da177e4 LT |
173 | pos -= pos % runtime->min_align; |
174 | return pos; | |
175 | } | |
176 | ||
98204646 TI |
177 | static int snd_pcm_update_hw_ptr_post(struct snd_pcm_substream *substream, |
178 | struct snd_pcm_runtime *runtime) | |
1da177e4 LT |
179 | { |
180 | snd_pcm_uframes_t avail; | |
181 | ||
182 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) | |
183 | avail = snd_pcm_playback_avail(runtime); | |
184 | else | |
185 | avail = snd_pcm_capture_avail(runtime); | |
186 | if (avail > runtime->avail_max) | |
187 | runtime->avail_max = avail; | |
188 | if (avail >= runtime->stop_threshold) { | |
189 | if (substream->runtime->status->state == SNDRV_PCM_STATE_DRAINING) | |
190 | snd_pcm_drain_done(substream); | |
191 | else | |
192 | xrun(substream); | |
193 | return -EPIPE; | |
194 | } | |
195 | if (avail >= runtime->control->avail_min) | |
196 | wake_up(&runtime->sleep); | |
197 | return 0; | |
198 | } | |
199 | ||
ed3da3d9 TI |
200 | #define hw_ptr_error(substream, fmt, args...) \ |
201 | do { \ | |
c62a01ad | 202 | if (xrun_debug(substream, 1)) { \ |
ed3da3d9 | 203 | if (printk_ratelimit()) { \ |
cad377ac | 204 | snd_printd("PCM: " fmt, ##args); \ |
ed3da3d9 TI |
205 | } \ |
206 | dump_stack_on_xrun(substream); \ | |
207 | } \ | |
208 | } while (0) | |
209 | ||
98204646 | 210 | static int snd_pcm_update_hw_ptr_interrupt(struct snd_pcm_substream *substream) |
1da177e4 | 211 | { |
877211f5 | 212 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 | 213 | snd_pcm_uframes_t pos; |
bbf6ad13 JK |
214 | snd_pcm_uframes_t old_hw_ptr, new_hw_ptr, hw_ptr_interrupt, hw_base; |
215 | snd_pcm_sframes_t hdelta, delta; | |
216 | unsigned long jdelta; | |
1da177e4 | 217 | |
bbf6ad13 | 218 | old_hw_ptr = runtime->status->hw_ptr; |
1da177e4 LT |
219 | pos = snd_pcm_update_hw_ptr_pos(substream, runtime); |
220 | if (pos == SNDRV_PCM_POS_XRUN) { | |
221 | xrun(substream); | |
222 | return -EPIPE; | |
223 | } | |
ed3da3d9 TI |
224 | hw_base = runtime->hw_ptr_base; |
225 | new_hw_ptr = hw_base + pos; | |
1da177e4 | 226 | hw_ptr_interrupt = runtime->hw_ptr_interrupt + runtime->period_size; |
ed3da3d9 | 227 | delta = new_hw_ptr - hw_ptr_interrupt; |
ded652f7 | 228 | if (hw_ptr_interrupt >= runtime->boundary) { |
8b22d943 TI |
229 | hw_ptr_interrupt -= runtime->boundary; |
230 | if (hw_base < runtime->boundary / 2) | |
231 | /* hw_base was already lapped; recalc delta */ | |
ded652f7 TI |
232 | delta = new_hw_ptr - hw_ptr_interrupt; |
233 | } | |
ed3da3d9 TI |
234 | if (delta < 0) { |
235 | delta += runtime->buffer_size; | |
236 | if (delta < 0) { | |
237 | hw_ptr_error(substream, | |
238 | "Unexpected hw_pointer value " | |
239 | "(stream=%i, pos=%ld, intr_ptr=%ld)\n", | |
240 | substream->stream, (long)pos, | |
241 | (long)hw_ptr_interrupt); | |
242 | /* rebase to interrupt position */ | |
243 | hw_base = new_hw_ptr = hw_ptr_interrupt; | |
ded652f7 TI |
244 | /* align hw_base to buffer_size */ |
245 | hw_base -= hw_base % runtime->buffer_size; | |
ed3da3d9 TI |
246 | delta = 0; |
247 | } else { | |
248 | hw_base += runtime->buffer_size; | |
8b22d943 | 249 | if (hw_base >= runtime->boundary) |
ed3da3d9 TI |
250 | hw_base = 0; |
251 | new_hw_ptr = hw_base + pos; | |
1da177e4 | 252 | } |
1da177e4 | 253 | } |
c87d9732 TI |
254 | |
255 | /* Do jiffies check only in xrun_debug mode */ | |
c62a01ad | 256 | if (!xrun_debug(substream, 4)) |
c87d9732 TI |
257 | goto no_jiffies_check; |
258 | ||
3e5b5016 TI |
259 | /* Skip the jiffies check for hardwares with BATCH flag. |
260 | * Such hardware usually just increases the position at each IRQ, | |
261 | * thus it can't give any strange position. | |
262 | */ | |
263 | if (runtime->hw.info & SNDRV_PCM_INFO_BATCH) | |
264 | goto no_jiffies_check; | |
bbf6ad13 | 265 | hdelta = new_hw_ptr - old_hw_ptr; |
a4444da3 JK |
266 | if (hdelta < runtime->delay) |
267 | goto no_jiffies_check; | |
268 | hdelta -= runtime->delay; | |
bbf6ad13 JK |
269 | jdelta = jiffies - runtime->hw_ptr_jiffies; |
270 | if (((hdelta * HZ) / runtime->rate) > jdelta + HZ/100) { | |
271 | delta = jdelta / | |
272 | (((runtime->period_size * HZ) / runtime->rate) | |
273 | + HZ/100); | |
274 | hw_ptr_error(substream, | |
275 | "hw_ptr skipping! [Q] " | |
276 | "(pos=%ld, delta=%ld, period=%ld, " | |
277 | "jdelta=%lu/%lu/%lu)\n", | |
278 | (long)pos, (long)hdelta, | |
279 | (long)runtime->period_size, jdelta, | |
280 | ((hdelta * HZ) / runtime->rate), delta); | |
281 | hw_ptr_interrupt = runtime->hw_ptr_interrupt + | |
282 | runtime->period_size * delta; | |
283 | if (hw_ptr_interrupt >= runtime->boundary) | |
284 | hw_ptr_interrupt -= runtime->boundary; | |
285 | /* rebase to interrupt position */ | |
286 | hw_base = new_hw_ptr = hw_ptr_interrupt; | |
287 | /* align hw_base to buffer_size */ | |
288 | hw_base -= hw_base % runtime->buffer_size; | |
289 | delta = 0; | |
290 | } | |
3e5b5016 | 291 | no_jiffies_check: |
bbf6ad13 | 292 | if (delta > runtime->period_size + runtime->period_size / 2) { |
ed3da3d9 TI |
293 | hw_ptr_error(substream, |
294 | "Lost interrupts? " | |
295 | "(stream=%i, delta=%ld, intr_ptr=%ld)\n", | |
296 | substream->stream, (long)delta, | |
297 | (long)hw_ptr_interrupt); | |
298 | /* rebase hw_ptr_interrupt */ | |
299 | hw_ptr_interrupt = | |
300 | new_hw_ptr - new_hw_ptr % runtime->period_size; | |
301 | } | |
1da177e4 LT |
302 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && |
303 | runtime->silence_size > 0) | |
304 | snd_pcm_playback_silence(substream, new_hw_ptr); | |
305 | ||
13f040f9 JK |
306 | if (runtime->status->hw_ptr == new_hw_ptr) |
307 | return 0; | |
308 | ||
ed3da3d9 | 309 | runtime->hw_ptr_base = hw_base; |
1da177e4 | 310 | runtime->status->hw_ptr = new_hw_ptr; |
bbf6ad13 | 311 | runtime->hw_ptr_jiffies = jiffies; |
ed3da3d9 | 312 | runtime->hw_ptr_interrupt = hw_ptr_interrupt; |
13f040f9 JK |
313 | if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) |
314 | snd_pcm_gettime(runtime, (struct timespec *)&runtime->status->tstamp); | |
1da177e4 LT |
315 | |
316 | return snd_pcm_update_hw_ptr_post(substream, runtime); | |
317 | } | |
318 | ||
319 | /* CAUTION: call it with irq disabled */ | |
877211f5 | 320 | int snd_pcm_update_hw_ptr(struct snd_pcm_substream *substream) |
1da177e4 | 321 | { |
877211f5 | 322 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 | 323 | snd_pcm_uframes_t pos; |
ed3da3d9 | 324 | snd_pcm_uframes_t old_hw_ptr, new_hw_ptr, hw_base; |
1da177e4 | 325 | snd_pcm_sframes_t delta; |
bbf6ad13 | 326 | unsigned long jdelta; |
1da177e4 LT |
327 | |
328 | old_hw_ptr = runtime->status->hw_ptr; | |
329 | pos = snd_pcm_update_hw_ptr_pos(substream, runtime); | |
330 | if (pos == SNDRV_PCM_POS_XRUN) { | |
331 | xrun(substream); | |
332 | return -EPIPE; | |
333 | } | |
ed3da3d9 TI |
334 | hw_base = runtime->hw_ptr_base; |
335 | new_hw_ptr = hw_base + pos; | |
1da177e4 | 336 | |
ed3da3d9 | 337 | delta = new_hw_ptr - old_hw_ptr; |
bbf6ad13 | 338 | jdelta = jiffies - runtime->hw_ptr_jiffies; |
ed3da3d9 TI |
339 | if (delta < 0) { |
340 | delta += runtime->buffer_size; | |
341 | if (delta < 0) { | |
342 | hw_ptr_error(substream, | |
343 | "Unexpected hw_pointer value [2] " | |
bbf6ad13 | 344 | "(stream=%i, pos=%ld, old_ptr=%ld, jdelta=%li)\n", |
ed3da3d9 | 345 | substream->stream, (long)pos, |
bbf6ad13 | 346 | (long)old_hw_ptr, jdelta); |
1da177e4 LT |
347 | return 0; |
348 | } | |
ed3da3d9 | 349 | hw_base += runtime->buffer_size; |
8b22d943 | 350 | if (hw_base >= runtime->boundary) |
ed3da3d9 TI |
351 | hw_base = 0; |
352 | new_hw_ptr = hw_base + pos; | |
353 | } | |
c87d9732 | 354 | /* Do jiffies check only in xrun_debug mode */ |
a4444da3 JK |
355 | if (!xrun_debug(substream, 4)) |
356 | goto no_jiffies_check; | |
357 | if (delta < runtime->delay) | |
358 | goto no_jiffies_check; | |
359 | delta -= runtime->delay; | |
360 | if (((delta * HZ) / runtime->rate) > jdelta + HZ/100) { | |
ed3da3d9 TI |
361 | hw_ptr_error(substream, |
362 | "hw_ptr skipping! " | |
bbf6ad13 | 363 | "(pos=%ld, delta=%ld, period=%ld, jdelta=%lu/%lu)\n", |
ed3da3d9 | 364 | (long)pos, (long)delta, |
bbf6ad13 JK |
365 | (long)runtime->period_size, jdelta, |
366 | ((delta * HZ) / runtime->rate)); | |
ed3da3d9 | 367 | return 0; |
1da177e4 | 368 | } |
a4444da3 | 369 | no_jiffies_check: |
1da177e4 LT |
370 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && |
371 | runtime->silence_size > 0) | |
372 | snd_pcm_playback_silence(substream, new_hw_ptr); | |
373 | ||
d86bf923 | 374 | if (runtime->status->hw_ptr == new_hw_ptr) |
13f040f9 JK |
375 | return 0; |
376 | ||
ed3da3d9 | 377 | runtime->hw_ptr_base = hw_base; |
1da177e4 | 378 | runtime->status->hw_ptr = new_hw_ptr; |
bbf6ad13 | 379 | runtime->hw_ptr_jiffies = jiffies; |
13f040f9 JK |
380 | if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) |
381 | snd_pcm_gettime(runtime, (struct timespec *)&runtime->status->tstamp); | |
1da177e4 LT |
382 | |
383 | return snd_pcm_update_hw_ptr_post(substream, runtime); | |
384 | } | |
385 | ||
386 | /** | |
387 | * snd_pcm_set_ops - set the PCM operators | |
388 | * @pcm: the pcm instance | |
389 | * @direction: stream direction, SNDRV_PCM_STREAM_XXX | |
390 | * @ops: the operator table | |
391 | * | |
392 | * Sets the given PCM operators to the pcm instance. | |
393 | */ | |
877211f5 | 394 | void snd_pcm_set_ops(struct snd_pcm *pcm, int direction, struct snd_pcm_ops *ops) |
1da177e4 | 395 | { |
877211f5 TI |
396 | struct snd_pcm_str *stream = &pcm->streams[direction]; |
397 | struct snd_pcm_substream *substream; | |
1da177e4 LT |
398 | |
399 | for (substream = stream->substream; substream != NULL; substream = substream->next) | |
400 | substream->ops = ops; | |
401 | } | |
402 | ||
e88e8ae6 | 403 | EXPORT_SYMBOL(snd_pcm_set_ops); |
1da177e4 LT |
404 | |
405 | /** | |
406 | * snd_pcm_sync - set the PCM sync id | |
407 | * @substream: the pcm substream | |
408 | * | |
409 | * Sets the PCM sync identifier for the card. | |
410 | */ | |
877211f5 | 411 | void snd_pcm_set_sync(struct snd_pcm_substream *substream) |
1da177e4 | 412 | { |
877211f5 | 413 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
414 | |
415 | runtime->sync.id32[0] = substream->pcm->card->number; | |
416 | runtime->sync.id32[1] = -1; | |
417 | runtime->sync.id32[2] = -1; | |
418 | runtime->sync.id32[3] = -1; | |
419 | } | |
420 | ||
e88e8ae6 TI |
421 | EXPORT_SYMBOL(snd_pcm_set_sync); |
422 | ||
1da177e4 LT |
423 | /* |
424 | * Standard ioctl routine | |
425 | */ | |
426 | ||
1da177e4 LT |
427 | static inline unsigned int div32(unsigned int a, unsigned int b, |
428 | unsigned int *r) | |
429 | { | |
430 | if (b == 0) { | |
431 | *r = 0; | |
432 | return UINT_MAX; | |
433 | } | |
434 | *r = a % b; | |
435 | return a / b; | |
436 | } | |
437 | ||
438 | static inline unsigned int div_down(unsigned int a, unsigned int b) | |
439 | { | |
440 | if (b == 0) | |
441 | return UINT_MAX; | |
442 | return a / b; | |
443 | } | |
444 | ||
445 | static inline unsigned int div_up(unsigned int a, unsigned int b) | |
446 | { | |
447 | unsigned int r; | |
448 | unsigned int q; | |
449 | if (b == 0) | |
450 | return UINT_MAX; | |
451 | q = div32(a, b, &r); | |
452 | if (r) | |
453 | ++q; | |
454 | return q; | |
455 | } | |
456 | ||
457 | static inline unsigned int mul(unsigned int a, unsigned int b) | |
458 | { | |
459 | if (a == 0) | |
460 | return 0; | |
461 | if (div_down(UINT_MAX, a) < b) | |
462 | return UINT_MAX; | |
463 | return a * b; | |
464 | } | |
465 | ||
466 | static inline unsigned int muldiv32(unsigned int a, unsigned int b, | |
467 | unsigned int c, unsigned int *r) | |
468 | { | |
469 | u_int64_t n = (u_int64_t) a * b; | |
470 | if (c == 0) { | |
7eaa943c | 471 | snd_BUG_ON(!n); |
1da177e4 LT |
472 | *r = 0; |
473 | return UINT_MAX; | |
474 | } | |
475 | div64_32(&n, c, r); | |
476 | if (n >= UINT_MAX) { | |
477 | *r = 0; | |
478 | return UINT_MAX; | |
479 | } | |
480 | return n; | |
481 | } | |
482 | ||
1da177e4 LT |
483 | /** |
484 | * snd_interval_refine - refine the interval value of configurator | |
485 | * @i: the interval value to refine | |
486 | * @v: the interval value to refer to | |
487 | * | |
488 | * Refines the interval value with the reference value. | |
489 | * The interval is changed to the range satisfying both intervals. | |
490 | * The interval status (min, max, integer, etc.) are evaluated. | |
491 | * | |
492 | * Returns non-zero if the value is changed, zero if not changed. | |
493 | */ | |
877211f5 | 494 | int snd_interval_refine(struct snd_interval *i, const struct snd_interval *v) |
1da177e4 LT |
495 | { |
496 | int changed = 0; | |
7eaa943c TI |
497 | if (snd_BUG_ON(snd_interval_empty(i))) |
498 | return -EINVAL; | |
1da177e4 LT |
499 | if (i->min < v->min) { |
500 | i->min = v->min; | |
501 | i->openmin = v->openmin; | |
502 | changed = 1; | |
503 | } else if (i->min == v->min && !i->openmin && v->openmin) { | |
504 | i->openmin = 1; | |
505 | changed = 1; | |
506 | } | |
507 | if (i->max > v->max) { | |
508 | i->max = v->max; | |
509 | i->openmax = v->openmax; | |
510 | changed = 1; | |
511 | } else if (i->max == v->max && !i->openmax && v->openmax) { | |
512 | i->openmax = 1; | |
513 | changed = 1; | |
514 | } | |
515 | if (!i->integer && v->integer) { | |
516 | i->integer = 1; | |
517 | changed = 1; | |
518 | } | |
519 | if (i->integer) { | |
520 | if (i->openmin) { | |
521 | i->min++; | |
522 | i->openmin = 0; | |
523 | } | |
524 | if (i->openmax) { | |
525 | i->max--; | |
526 | i->openmax = 0; | |
527 | } | |
528 | } else if (!i->openmin && !i->openmax && i->min == i->max) | |
529 | i->integer = 1; | |
530 | if (snd_interval_checkempty(i)) { | |
531 | snd_interval_none(i); | |
532 | return -EINVAL; | |
533 | } | |
534 | return changed; | |
535 | } | |
536 | ||
e88e8ae6 TI |
537 | EXPORT_SYMBOL(snd_interval_refine); |
538 | ||
877211f5 | 539 | static int snd_interval_refine_first(struct snd_interval *i) |
1da177e4 | 540 | { |
7eaa943c TI |
541 | if (snd_BUG_ON(snd_interval_empty(i))) |
542 | return -EINVAL; | |
1da177e4 LT |
543 | if (snd_interval_single(i)) |
544 | return 0; | |
545 | i->max = i->min; | |
546 | i->openmax = i->openmin; | |
547 | if (i->openmax) | |
548 | i->max++; | |
549 | return 1; | |
550 | } | |
551 | ||
877211f5 | 552 | static int snd_interval_refine_last(struct snd_interval *i) |
1da177e4 | 553 | { |
7eaa943c TI |
554 | if (snd_BUG_ON(snd_interval_empty(i))) |
555 | return -EINVAL; | |
1da177e4 LT |
556 | if (snd_interval_single(i)) |
557 | return 0; | |
558 | i->min = i->max; | |
559 | i->openmin = i->openmax; | |
560 | if (i->openmin) | |
561 | i->min--; | |
562 | return 1; | |
563 | } | |
564 | ||
877211f5 | 565 | void snd_interval_mul(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c) |
1da177e4 LT |
566 | { |
567 | if (a->empty || b->empty) { | |
568 | snd_interval_none(c); | |
569 | return; | |
570 | } | |
571 | c->empty = 0; | |
572 | c->min = mul(a->min, b->min); | |
573 | c->openmin = (a->openmin || b->openmin); | |
574 | c->max = mul(a->max, b->max); | |
575 | c->openmax = (a->openmax || b->openmax); | |
576 | c->integer = (a->integer && b->integer); | |
577 | } | |
578 | ||
579 | /** | |
580 | * snd_interval_div - refine the interval value with division | |
df8db936 TI |
581 | * @a: dividend |
582 | * @b: divisor | |
583 | * @c: quotient | |
1da177e4 LT |
584 | * |
585 | * c = a / b | |
586 | * | |
587 | * Returns non-zero if the value is changed, zero if not changed. | |
588 | */ | |
877211f5 | 589 | void snd_interval_div(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c) |
1da177e4 LT |
590 | { |
591 | unsigned int r; | |
592 | if (a->empty || b->empty) { | |
593 | snd_interval_none(c); | |
594 | return; | |
595 | } | |
596 | c->empty = 0; | |
597 | c->min = div32(a->min, b->max, &r); | |
598 | c->openmin = (r || a->openmin || b->openmax); | |
599 | if (b->min > 0) { | |
600 | c->max = div32(a->max, b->min, &r); | |
601 | if (r) { | |
602 | c->max++; | |
603 | c->openmax = 1; | |
604 | } else | |
605 | c->openmax = (a->openmax || b->openmin); | |
606 | } else { | |
607 | c->max = UINT_MAX; | |
608 | c->openmax = 0; | |
609 | } | |
610 | c->integer = 0; | |
611 | } | |
612 | ||
613 | /** | |
614 | * snd_interval_muldivk - refine the interval value | |
df8db936 TI |
615 | * @a: dividend 1 |
616 | * @b: dividend 2 | |
617 | * @k: divisor (as integer) | |
618 | * @c: result | |
619 | * | |
1da177e4 LT |
620 | * c = a * b / k |
621 | * | |
622 | * Returns non-zero if the value is changed, zero if not changed. | |
623 | */ | |
877211f5 TI |
624 | void snd_interval_muldivk(const struct snd_interval *a, const struct snd_interval *b, |
625 | unsigned int k, struct snd_interval *c) | |
1da177e4 LT |
626 | { |
627 | unsigned int r; | |
628 | if (a->empty || b->empty) { | |
629 | snd_interval_none(c); | |
630 | return; | |
631 | } | |
632 | c->empty = 0; | |
633 | c->min = muldiv32(a->min, b->min, k, &r); | |
634 | c->openmin = (r || a->openmin || b->openmin); | |
635 | c->max = muldiv32(a->max, b->max, k, &r); | |
636 | if (r) { | |
637 | c->max++; | |
638 | c->openmax = 1; | |
639 | } else | |
640 | c->openmax = (a->openmax || b->openmax); | |
641 | c->integer = 0; | |
642 | } | |
643 | ||
644 | /** | |
645 | * snd_interval_mulkdiv - refine the interval value | |
df8db936 TI |
646 | * @a: dividend 1 |
647 | * @k: dividend 2 (as integer) | |
648 | * @b: divisor | |
649 | * @c: result | |
1da177e4 LT |
650 | * |
651 | * c = a * k / b | |
652 | * | |
653 | * Returns non-zero if the value is changed, zero if not changed. | |
654 | */ | |
877211f5 TI |
655 | void snd_interval_mulkdiv(const struct snd_interval *a, unsigned int k, |
656 | 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 = muldiv32(a->min, k, b->max, &r); | |
665 | c->openmin = (r || a->openmin || b->openmax); | |
666 | if (b->min > 0) { | |
667 | c->max = muldiv32(a->max, k, 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 | ||
1da177e4 LT |
680 | /* ---- */ |
681 | ||
682 | ||
683 | /** | |
684 | * snd_interval_ratnum - refine the interval value | |
df8db936 TI |
685 | * @i: interval to refine |
686 | * @rats_count: number of ratnum_t | |
687 | * @rats: ratnum_t array | |
688 | * @nump: pointer to store the resultant numerator | |
689 | * @denp: pointer to store the resultant denominator | |
1da177e4 LT |
690 | * |
691 | * Returns non-zero if the value is changed, zero if not changed. | |
692 | */ | |
877211f5 TI |
693 | int snd_interval_ratnum(struct snd_interval *i, |
694 | unsigned int rats_count, struct snd_ratnum *rats, | |
695 | unsigned int *nump, unsigned int *denp) | |
1da177e4 LT |
696 | { |
697 | unsigned int best_num, best_diff, best_den; | |
698 | unsigned int k; | |
877211f5 | 699 | struct snd_interval t; |
1da177e4 LT |
700 | int err; |
701 | ||
702 | best_num = best_den = best_diff = 0; | |
703 | for (k = 0; k < rats_count; ++k) { | |
704 | unsigned int num = rats[k].num; | |
705 | unsigned int den; | |
706 | unsigned int q = i->min; | |
707 | int diff; | |
708 | if (q == 0) | |
709 | q = 1; | |
710 | den = div_down(num, q); | |
711 | if (den < rats[k].den_min) | |
712 | continue; | |
713 | if (den > rats[k].den_max) | |
714 | den = rats[k].den_max; | |
715 | else { | |
716 | unsigned int r; | |
717 | r = (den - rats[k].den_min) % rats[k].den_step; | |
718 | if (r != 0) | |
719 | den -= r; | |
720 | } | |
721 | diff = num - q * den; | |
722 | if (best_num == 0 || | |
723 | diff * best_den < best_diff * den) { | |
724 | best_diff = diff; | |
725 | best_den = den; | |
726 | best_num = num; | |
727 | } | |
728 | } | |
729 | if (best_den == 0) { | |
730 | i->empty = 1; | |
731 | return -EINVAL; | |
732 | } | |
733 | t.min = div_down(best_num, best_den); | |
734 | t.openmin = !!(best_num % best_den); | |
735 | ||
736 | best_num = best_den = best_diff = 0; | |
737 | for (k = 0; k < rats_count; ++k) { | |
738 | unsigned int num = rats[k].num; | |
739 | unsigned int den; | |
740 | unsigned int q = i->max; | |
741 | int diff; | |
742 | if (q == 0) { | |
743 | i->empty = 1; | |
744 | return -EINVAL; | |
745 | } | |
746 | den = div_up(num, q); | |
747 | if (den > rats[k].den_max) | |
748 | continue; | |
749 | if (den < rats[k].den_min) | |
750 | den = rats[k].den_min; | |
751 | else { | |
752 | unsigned int r; | |
753 | r = (den - rats[k].den_min) % rats[k].den_step; | |
754 | if (r != 0) | |
755 | den += rats[k].den_step - r; | |
756 | } | |
757 | diff = q * den - num; | |
758 | if (best_num == 0 || | |
759 | diff * best_den < best_diff * den) { | |
760 | best_diff = diff; | |
761 | best_den = den; | |
762 | best_num = num; | |
763 | } | |
764 | } | |
765 | if (best_den == 0) { | |
766 | i->empty = 1; | |
767 | return -EINVAL; | |
768 | } | |
769 | t.max = div_up(best_num, best_den); | |
770 | t.openmax = !!(best_num % best_den); | |
771 | t.integer = 0; | |
772 | err = snd_interval_refine(i, &t); | |
773 | if (err < 0) | |
774 | return err; | |
775 | ||
776 | if (snd_interval_single(i)) { | |
777 | if (nump) | |
778 | *nump = best_num; | |
779 | if (denp) | |
780 | *denp = best_den; | |
781 | } | |
782 | return err; | |
783 | } | |
784 | ||
e88e8ae6 TI |
785 | EXPORT_SYMBOL(snd_interval_ratnum); |
786 | ||
1da177e4 LT |
787 | /** |
788 | * snd_interval_ratden - refine the interval value | |
df8db936 | 789 | * @i: interval to refine |
877211f5 TI |
790 | * @rats_count: number of struct ratden |
791 | * @rats: struct ratden array | |
df8db936 TI |
792 | * @nump: pointer to store the resultant numerator |
793 | * @denp: pointer to store the resultant denominator | |
1da177e4 LT |
794 | * |
795 | * Returns non-zero if the value is changed, zero if not changed. | |
796 | */ | |
877211f5 TI |
797 | static int snd_interval_ratden(struct snd_interval *i, |
798 | unsigned int rats_count, struct snd_ratden *rats, | |
1da177e4 LT |
799 | unsigned int *nump, unsigned int *denp) |
800 | { | |
801 | unsigned int best_num, best_diff, best_den; | |
802 | unsigned int k; | |
877211f5 | 803 | struct snd_interval t; |
1da177e4 LT |
804 | int err; |
805 | ||
806 | best_num = best_den = best_diff = 0; | |
807 | for (k = 0; k < rats_count; ++k) { | |
808 | unsigned int num; | |
809 | unsigned int den = rats[k].den; | |
810 | unsigned int q = i->min; | |
811 | int diff; | |
812 | num = mul(q, den); | |
813 | if (num > rats[k].num_max) | |
814 | continue; | |
815 | if (num < rats[k].num_min) | |
816 | num = rats[k].num_max; | |
817 | else { | |
818 | unsigned int r; | |
819 | r = (num - rats[k].num_min) % rats[k].num_step; | |
820 | if (r != 0) | |
821 | num += rats[k].num_step - r; | |
822 | } | |
823 | diff = num - q * den; | |
824 | if (best_num == 0 || | |
825 | diff * best_den < best_diff * den) { | |
826 | best_diff = diff; | |
827 | best_den = den; | |
828 | best_num = num; | |
829 | } | |
830 | } | |
831 | if (best_den == 0) { | |
832 | i->empty = 1; | |
833 | return -EINVAL; | |
834 | } | |
835 | t.min = div_down(best_num, best_den); | |
836 | t.openmin = !!(best_num % best_den); | |
837 | ||
838 | best_num = best_den = best_diff = 0; | |
839 | for (k = 0; k < rats_count; ++k) { | |
840 | unsigned int num; | |
841 | unsigned int den = rats[k].den; | |
842 | unsigned int q = i->max; | |
843 | int diff; | |
844 | num = mul(q, den); | |
845 | if (num < rats[k].num_min) | |
846 | continue; | |
847 | if (num > rats[k].num_max) | |
848 | num = rats[k].num_max; | |
849 | else { | |
850 | unsigned int r; | |
851 | r = (num - rats[k].num_min) % rats[k].num_step; | |
852 | if (r != 0) | |
853 | num -= r; | |
854 | } | |
855 | diff = q * den - num; | |
856 | if (best_num == 0 || | |
857 | diff * best_den < best_diff * den) { | |
858 | best_diff = diff; | |
859 | best_den = den; | |
860 | best_num = num; | |
861 | } | |
862 | } | |
863 | if (best_den == 0) { | |
864 | i->empty = 1; | |
865 | return -EINVAL; | |
866 | } | |
867 | t.max = div_up(best_num, best_den); | |
868 | t.openmax = !!(best_num % best_den); | |
869 | t.integer = 0; | |
870 | err = snd_interval_refine(i, &t); | |
871 | if (err < 0) | |
872 | return err; | |
873 | ||
874 | if (snd_interval_single(i)) { | |
875 | if (nump) | |
876 | *nump = best_num; | |
877 | if (denp) | |
878 | *denp = best_den; | |
879 | } | |
880 | return err; | |
881 | } | |
882 | ||
883 | /** | |
884 | * snd_interval_list - refine the interval value from the list | |
885 | * @i: the interval value to refine | |
886 | * @count: the number of elements in the list | |
887 | * @list: the value list | |
888 | * @mask: the bit-mask to evaluate | |
889 | * | |
890 | * Refines the interval value from the list. | |
891 | * When mask is non-zero, only the elements corresponding to bit 1 are | |
892 | * evaluated. | |
893 | * | |
894 | * Returns non-zero if the value is changed, zero if not changed. | |
895 | */ | |
877211f5 | 896 | int snd_interval_list(struct snd_interval *i, unsigned int count, unsigned int *list, unsigned int mask) |
1da177e4 LT |
897 | { |
898 | unsigned int k; | |
899 | int changed = 0; | |
0981a260 TI |
900 | |
901 | if (!count) { | |
902 | i->empty = 1; | |
903 | return -EINVAL; | |
904 | } | |
1da177e4 LT |
905 | for (k = 0; k < count; k++) { |
906 | if (mask && !(mask & (1 << k))) | |
907 | continue; | |
908 | if (i->min == list[k] && !i->openmin) | |
909 | goto _l1; | |
910 | if (i->min < list[k]) { | |
911 | i->min = list[k]; | |
912 | i->openmin = 0; | |
913 | changed = 1; | |
914 | goto _l1; | |
915 | } | |
916 | } | |
917 | i->empty = 1; | |
918 | return -EINVAL; | |
919 | _l1: | |
920 | for (k = count; k-- > 0;) { | |
921 | if (mask && !(mask & (1 << k))) | |
922 | continue; | |
923 | if (i->max == list[k] && !i->openmax) | |
924 | goto _l2; | |
925 | if (i->max > list[k]) { | |
926 | i->max = list[k]; | |
927 | i->openmax = 0; | |
928 | changed = 1; | |
929 | goto _l2; | |
930 | } | |
931 | } | |
932 | i->empty = 1; | |
933 | return -EINVAL; | |
934 | _l2: | |
935 | if (snd_interval_checkempty(i)) { | |
936 | i->empty = 1; | |
937 | return -EINVAL; | |
938 | } | |
939 | return changed; | |
940 | } | |
941 | ||
e88e8ae6 TI |
942 | EXPORT_SYMBOL(snd_interval_list); |
943 | ||
877211f5 | 944 | static int snd_interval_step(struct snd_interval *i, unsigned int min, unsigned int step) |
1da177e4 LT |
945 | { |
946 | unsigned int n; | |
947 | int changed = 0; | |
948 | n = (i->min - min) % step; | |
949 | if (n != 0 || i->openmin) { | |
950 | i->min += step - n; | |
951 | changed = 1; | |
952 | } | |
953 | n = (i->max - min) % step; | |
954 | if (n != 0 || i->openmax) { | |
955 | i->max -= n; | |
956 | changed = 1; | |
957 | } | |
958 | if (snd_interval_checkempty(i)) { | |
959 | i->empty = 1; | |
960 | return -EINVAL; | |
961 | } | |
962 | return changed; | |
963 | } | |
964 | ||
965 | /* Info constraints helpers */ | |
966 | ||
967 | /** | |
968 | * snd_pcm_hw_rule_add - add the hw-constraint rule | |
969 | * @runtime: the pcm runtime instance | |
970 | * @cond: condition bits | |
971 | * @var: the variable to evaluate | |
972 | * @func: the evaluation function | |
973 | * @private: the private data pointer passed to function | |
974 | * @dep: the dependent variables | |
975 | * | |
976 | * Returns zero if successful, or a negative error code on failure. | |
977 | */ | |
877211f5 | 978 | int snd_pcm_hw_rule_add(struct snd_pcm_runtime *runtime, unsigned int cond, |
1da177e4 LT |
979 | int var, |
980 | snd_pcm_hw_rule_func_t func, void *private, | |
981 | int dep, ...) | |
982 | { | |
877211f5 TI |
983 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; |
984 | struct snd_pcm_hw_rule *c; | |
1da177e4 LT |
985 | unsigned int k; |
986 | va_list args; | |
987 | va_start(args, dep); | |
988 | if (constrs->rules_num >= constrs->rules_all) { | |
877211f5 | 989 | struct snd_pcm_hw_rule *new; |
1da177e4 LT |
990 | unsigned int new_rules = constrs->rules_all + 16; |
991 | new = kcalloc(new_rules, sizeof(*c), GFP_KERNEL); | |
992 | if (!new) | |
993 | return -ENOMEM; | |
994 | if (constrs->rules) { | |
995 | memcpy(new, constrs->rules, | |
996 | constrs->rules_num * sizeof(*c)); | |
997 | kfree(constrs->rules); | |
998 | } | |
999 | constrs->rules = new; | |
1000 | constrs->rules_all = new_rules; | |
1001 | } | |
1002 | c = &constrs->rules[constrs->rules_num]; | |
1003 | c->cond = cond; | |
1004 | c->func = func; | |
1005 | c->var = var; | |
1006 | c->private = private; | |
1007 | k = 0; | |
1008 | while (1) { | |
7eaa943c TI |
1009 | if (snd_BUG_ON(k >= ARRAY_SIZE(c->deps))) |
1010 | return -EINVAL; | |
1da177e4 LT |
1011 | c->deps[k++] = dep; |
1012 | if (dep < 0) | |
1013 | break; | |
1014 | dep = va_arg(args, int); | |
1015 | } | |
1016 | constrs->rules_num++; | |
1017 | va_end(args); | |
1018 | return 0; | |
1019 | } | |
1020 | ||
e88e8ae6 TI |
1021 | EXPORT_SYMBOL(snd_pcm_hw_rule_add); |
1022 | ||
1da177e4 | 1023 | /** |
1c85cc64 | 1024 | * snd_pcm_hw_constraint_mask - apply the given bitmap mask constraint |
df8db936 TI |
1025 | * @runtime: PCM runtime instance |
1026 | * @var: hw_params variable to apply the mask | |
1027 | * @mask: the bitmap mask | |
1028 | * | |
1c85cc64 | 1029 | * Apply the constraint of the given bitmap mask to a 32-bit mask parameter. |
1da177e4 | 1030 | */ |
877211f5 | 1031 | int snd_pcm_hw_constraint_mask(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, |
1da177e4 LT |
1032 | u_int32_t mask) |
1033 | { | |
877211f5 TI |
1034 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; |
1035 | struct snd_mask *maskp = constrs_mask(constrs, var); | |
1da177e4 LT |
1036 | *maskp->bits &= mask; |
1037 | memset(maskp->bits + 1, 0, (SNDRV_MASK_MAX-32) / 8); /* clear rest */ | |
1038 | if (*maskp->bits == 0) | |
1039 | return -EINVAL; | |
1040 | return 0; | |
1041 | } | |
1042 | ||
1043 | /** | |
1c85cc64 | 1044 | * snd_pcm_hw_constraint_mask64 - apply the given bitmap mask constraint |
df8db936 TI |
1045 | * @runtime: PCM runtime instance |
1046 | * @var: hw_params variable to apply the mask | |
1047 | * @mask: the 64bit bitmap mask | |
1048 | * | |
1c85cc64 | 1049 | * Apply the constraint of the given bitmap mask to a 64-bit mask parameter. |
1da177e4 | 1050 | */ |
877211f5 | 1051 | int snd_pcm_hw_constraint_mask64(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, |
1da177e4 LT |
1052 | u_int64_t mask) |
1053 | { | |
877211f5 TI |
1054 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; |
1055 | struct snd_mask *maskp = constrs_mask(constrs, var); | |
1da177e4 LT |
1056 | maskp->bits[0] &= (u_int32_t)mask; |
1057 | maskp->bits[1] &= (u_int32_t)(mask >> 32); | |
1058 | memset(maskp->bits + 2, 0, (SNDRV_MASK_MAX-64) / 8); /* clear rest */ | |
1059 | if (! maskp->bits[0] && ! maskp->bits[1]) | |
1060 | return -EINVAL; | |
1061 | return 0; | |
1062 | } | |
1063 | ||
1064 | /** | |
1c85cc64 | 1065 | * snd_pcm_hw_constraint_integer - apply an integer constraint to an interval |
df8db936 TI |
1066 | * @runtime: PCM runtime instance |
1067 | * @var: hw_params variable to apply the integer constraint | |
1068 | * | |
1069 | * Apply the constraint of integer to an interval parameter. | |
1da177e4 | 1070 | */ |
877211f5 | 1071 | int snd_pcm_hw_constraint_integer(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var) |
1da177e4 | 1072 | { |
877211f5 | 1073 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; |
1da177e4 LT |
1074 | return snd_interval_setinteger(constrs_interval(constrs, var)); |
1075 | } | |
1076 | ||
e88e8ae6 TI |
1077 | EXPORT_SYMBOL(snd_pcm_hw_constraint_integer); |
1078 | ||
1da177e4 | 1079 | /** |
1c85cc64 | 1080 | * snd_pcm_hw_constraint_minmax - apply a min/max range constraint to an interval |
df8db936 TI |
1081 | * @runtime: PCM runtime instance |
1082 | * @var: hw_params variable to apply the range | |
1083 | * @min: the minimal value | |
1084 | * @max: the maximal value | |
1085 | * | |
1086 | * Apply the min/max range constraint to an interval parameter. | |
1da177e4 | 1087 | */ |
877211f5 | 1088 | int snd_pcm_hw_constraint_minmax(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, |
1da177e4 LT |
1089 | unsigned int min, unsigned int max) |
1090 | { | |
877211f5 TI |
1091 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; |
1092 | struct snd_interval t; | |
1da177e4 LT |
1093 | t.min = min; |
1094 | t.max = max; | |
1095 | t.openmin = t.openmax = 0; | |
1096 | t.integer = 0; | |
1097 | return snd_interval_refine(constrs_interval(constrs, var), &t); | |
1098 | } | |
1099 | ||
e88e8ae6 TI |
1100 | EXPORT_SYMBOL(snd_pcm_hw_constraint_minmax); |
1101 | ||
877211f5 TI |
1102 | static int snd_pcm_hw_rule_list(struct snd_pcm_hw_params *params, |
1103 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 1104 | { |
877211f5 | 1105 | struct snd_pcm_hw_constraint_list *list = rule->private; |
1da177e4 LT |
1106 | return snd_interval_list(hw_param_interval(params, rule->var), list->count, list->list, list->mask); |
1107 | } | |
1108 | ||
1109 | ||
1110 | /** | |
1c85cc64 | 1111 | * snd_pcm_hw_constraint_list - apply a list of constraints to a parameter |
df8db936 TI |
1112 | * @runtime: PCM runtime instance |
1113 | * @cond: condition bits | |
1114 | * @var: hw_params variable to apply the list constraint | |
1115 | * @l: list | |
1116 | * | |
1117 | * Apply the list of constraints to an interval parameter. | |
1da177e4 | 1118 | */ |
877211f5 | 1119 | int snd_pcm_hw_constraint_list(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1120 | unsigned int cond, |
1121 | snd_pcm_hw_param_t var, | |
877211f5 | 1122 | struct snd_pcm_hw_constraint_list *l) |
1da177e4 LT |
1123 | { |
1124 | return snd_pcm_hw_rule_add(runtime, cond, var, | |
1125 | snd_pcm_hw_rule_list, l, | |
1126 | var, -1); | |
1127 | } | |
1128 | ||
e88e8ae6 TI |
1129 | EXPORT_SYMBOL(snd_pcm_hw_constraint_list); |
1130 | ||
877211f5 TI |
1131 | static int snd_pcm_hw_rule_ratnums(struct snd_pcm_hw_params *params, |
1132 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 1133 | { |
877211f5 | 1134 | struct snd_pcm_hw_constraint_ratnums *r = rule->private; |
1da177e4 LT |
1135 | unsigned int num = 0, den = 0; |
1136 | int err; | |
1137 | err = snd_interval_ratnum(hw_param_interval(params, rule->var), | |
1138 | r->nrats, r->rats, &num, &den); | |
1139 | if (err >= 0 && den && rule->var == SNDRV_PCM_HW_PARAM_RATE) { | |
1140 | params->rate_num = num; | |
1141 | params->rate_den = den; | |
1142 | } | |
1143 | return err; | |
1144 | } | |
1145 | ||
1146 | /** | |
1c85cc64 | 1147 | * snd_pcm_hw_constraint_ratnums - apply ratnums constraint to a parameter |
df8db936 TI |
1148 | * @runtime: PCM runtime instance |
1149 | * @cond: condition bits | |
1150 | * @var: hw_params variable to apply the ratnums constraint | |
877211f5 | 1151 | * @r: struct snd_ratnums constriants |
1da177e4 | 1152 | */ |
877211f5 | 1153 | int snd_pcm_hw_constraint_ratnums(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1154 | unsigned int cond, |
1155 | snd_pcm_hw_param_t var, | |
877211f5 | 1156 | struct snd_pcm_hw_constraint_ratnums *r) |
1da177e4 LT |
1157 | { |
1158 | return snd_pcm_hw_rule_add(runtime, cond, var, | |
1159 | snd_pcm_hw_rule_ratnums, r, | |
1160 | var, -1); | |
1161 | } | |
1162 | ||
e88e8ae6 TI |
1163 | EXPORT_SYMBOL(snd_pcm_hw_constraint_ratnums); |
1164 | ||
877211f5 TI |
1165 | static int snd_pcm_hw_rule_ratdens(struct snd_pcm_hw_params *params, |
1166 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 1167 | { |
877211f5 | 1168 | struct snd_pcm_hw_constraint_ratdens *r = rule->private; |
1da177e4 LT |
1169 | unsigned int num = 0, den = 0; |
1170 | int err = snd_interval_ratden(hw_param_interval(params, rule->var), | |
1171 | r->nrats, r->rats, &num, &den); | |
1172 | if (err >= 0 && den && rule->var == SNDRV_PCM_HW_PARAM_RATE) { | |
1173 | params->rate_num = num; | |
1174 | params->rate_den = den; | |
1175 | } | |
1176 | return err; | |
1177 | } | |
1178 | ||
1179 | /** | |
1c85cc64 | 1180 | * snd_pcm_hw_constraint_ratdens - apply ratdens constraint to a parameter |
df8db936 TI |
1181 | * @runtime: PCM runtime instance |
1182 | * @cond: condition bits | |
1183 | * @var: hw_params variable to apply the ratdens constraint | |
877211f5 | 1184 | * @r: struct snd_ratdens constriants |
1da177e4 | 1185 | */ |
877211f5 | 1186 | int snd_pcm_hw_constraint_ratdens(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1187 | unsigned int cond, |
1188 | snd_pcm_hw_param_t var, | |
877211f5 | 1189 | struct snd_pcm_hw_constraint_ratdens *r) |
1da177e4 LT |
1190 | { |
1191 | return snd_pcm_hw_rule_add(runtime, cond, var, | |
1192 | snd_pcm_hw_rule_ratdens, r, | |
1193 | var, -1); | |
1194 | } | |
1195 | ||
e88e8ae6 TI |
1196 | EXPORT_SYMBOL(snd_pcm_hw_constraint_ratdens); |
1197 | ||
877211f5 TI |
1198 | static int snd_pcm_hw_rule_msbits(struct snd_pcm_hw_params *params, |
1199 | struct snd_pcm_hw_rule *rule) | |
1da177e4 LT |
1200 | { |
1201 | unsigned int l = (unsigned long) rule->private; | |
1202 | int width = l & 0xffff; | |
1203 | unsigned int msbits = l >> 16; | |
877211f5 | 1204 | struct snd_interval *i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS); |
1da177e4 LT |
1205 | if (snd_interval_single(i) && snd_interval_value(i) == width) |
1206 | params->msbits = msbits; | |
1207 | return 0; | |
1208 | } | |
1209 | ||
1210 | /** | |
1c85cc64 | 1211 | * snd_pcm_hw_constraint_msbits - add a hw constraint msbits rule |
df8db936 TI |
1212 | * @runtime: PCM runtime instance |
1213 | * @cond: condition bits | |
1214 | * @width: sample bits width | |
1215 | * @msbits: msbits width | |
1da177e4 | 1216 | */ |
877211f5 | 1217 | int snd_pcm_hw_constraint_msbits(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1218 | unsigned int cond, |
1219 | unsigned int width, | |
1220 | unsigned int msbits) | |
1221 | { | |
1222 | unsigned long l = (msbits << 16) | width; | |
1223 | return snd_pcm_hw_rule_add(runtime, cond, -1, | |
1224 | snd_pcm_hw_rule_msbits, | |
1225 | (void*) l, | |
1226 | SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); | |
1227 | } | |
1228 | ||
e88e8ae6 TI |
1229 | EXPORT_SYMBOL(snd_pcm_hw_constraint_msbits); |
1230 | ||
877211f5 TI |
1231 | static int snd_pcm_hw_rule_step(struct snd_pcm_hw_params *params, |
1232 | struct snd_pcm_hw_rule *rule) | |
1da177e4 LT |
1233 | { |
1234 | unsigned long step = (unsigned long) rule->private; | |
1235 | return snd_interval_step(hw_param_interval(params, rule->var), 0, step); | |
1236 | } | |
1237 | ||
1238 | /** | |
1c85cc64 | 1239 | * snd_pcm_hw_constraint_step - add a hw constraint step rule |
df8db936 TI |
1240 | * @runtime: PCM runtime instance |
1241 | * @cond: condition bits | |
1242 | * @var: hw_params variable to apply the step constraint | |
1243 | * @step: step size | |
1da177e4 | 1244 | */ |
877211f5 | 1245 | int snd_pcm_hw_constraint_step(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1246 | unsigned int cond, |
1247 | snd_pcm_hw_param_t var, | |
1248 | unsigned long step) | |
1249 | { | |
1250 | return snd_pcm_hw_rule_add(runtime, cond, var, | |
1251 | snd_pcm_hw_rule_step, (void *) step, | |
1252 | var, -1); | |
1253 | } | |
1254 | ||
e88e8ae6 TI |
1255 | EXPORT_SYMBOL(snd_pcm_hw_constraint_step); |
1256 | ||
877211f5 | 1257 | static int snd_pcm_hw_rule_pow2(struct snd_pcm_hw_params *params, struct snd_pcm_hw_rule *rule) |
1da177e4 | 1258 | { |
67c39317 | 1259 | static unsigned int pow2_sizes[] = { |
1da177e4 LT |
1260 | 1<<0, 1<<1, 1<<2, 1<<3, 1<<4, 1<<5, 1<<6, 1<<7, |
1261 | 1<<8, 1<<9, 1<<10, 1<<11, 1<<12, 1<<13, 1<<14, 1<<15, | |
1262 | 1<<16, 1<<17, 1<<18, 1<<19, 1<<20, 1<<21, 1<<22, 1<<23, | |
1263 | 1<<24, 1<<25, 1<<26, 1<<27, 1<<28, 1<<29, 1<<30 | |
1264 | }; | |
1265 | return snd_interval_list(hw_param_interval(params, rule->var), | |
1266 | ARRAY_SIZE(pow2_sizes), pow2_sizes, 0); | |
1267 | } | |
1268 | ||
1269 | /** | |
1c85cc64 | 1270 | * snd_pcm_hw_constraint_pow2 - add a hw constraint power-of-2 rule |
df8db936 TI |
1271 | * @runtime: PCM runtime instance |
1272 | * @cond: condition bits | |
1273 | * @var: hw_params variable to apply the power-of-2 constraint | |
1da177e4 | 1274 | */ |
877211f5 | 1275 | int snd_pcm_hw_constraint_pow2(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1276 | unsigned int cond, |
1277 | snd_pcm_hw_param_t var) | |
1278 | { | |
1279 | return snd_pcm_hw_rule_add(runtime, cond, var, | |
1280 | snd_pcm_hw_rule_pow2, NULL, | |
1281 | var, -1); | |
1282 | } | |
1283 | ||
e88e8ae6 TI |
1284 | EXPORT_SYMBOL(snd_pcm_hw_constraint_pow2); |
1285 | ||
877211f5 | 1286 | static void _snd_pcm_hw_param_any(struct snd_pcm_hw_params *params, |
123992f7 | 1287 | snd_pcm_hw_param_t var) |
1da177e4 LT |
1288 | { |
1289 | if (hw_is_mask(var)) { | |
1290 | snd_mask_any(hw_param_mask(params, var)); | |
1291 | params->cmask |= 1 << var; | |
1292 | params->rmask |= 1 << var; | |
1293 | return; | |
1294 | } | |
1295 | if (hw_is_interval(var)) { | |
1296 | snd_interval_any(hw_param_interval(params, var)); | |
1297 | params->cmask |= 1 << var; | |
1298 | params->rmask |= 1 << var; | |
1299 | return; | |
1300 | } | |
1301 | snd_BUG(); | |
1302 | } | |
1303 | ||
877211f5 | 1304 | void _snd_pcm_hw_params_any(struct snd_pcm_hw_params *params) |
1da177e4 LT |
1305 | { |
1306 | unsigned int k; | |
1307 | memset(params, 0, sizeof(*params)); | |
1308 | for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) | |
1309 | _snd_pcm_hw_param_any(params, k); | |
1310 | for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) | |
1311 | _snd_pcm_hw_param_any(params, k); | |
1312 | params->info = ~0U; | |
1313 | } | |
1314 | ||
e88e8ae6 | 1315 | EXPORT_SYMBOL(_snd_pcm_hw_params_any); |
1da177e4 LT |
1316 | |
1317 | /** | |
1c85cc64 | 1318 | * snd_pcm_hw_param_value - return @params field @var value |
df8db936 TI |
1319 | * @params: the hw_params instance |
1320 | * @var: parameter to retrieve | |
1c85cc64 | 1321 | * @dir: pointer to the direction (-1,0,1) or %NULL |
1da177e4 | 1322 | * |
1c85cc64 RD |
1323 | * Return the value for field @var if it's fixed in configuration space |
1324 | * defined by @params. Return -%EINVAL otherwise. | |
1da177e4 | 1325 | */ |
e88e8ae6 TI |
1326 | int snd_pcm_hw_param_value(const struct snd_pcm_hw_params *params, |
1327 | snd_pcm_hw_param_t var, int *dir) | |
1da177e4 LT |
1328 | { |
1329 | if (hw_is_mask(var)) { | |
877211f5 | 1330 | const struct snd_mask *mask = hw_param_mask_c(params, var); |
1da177e4 LT |
1331 | if (!snd_mask_single(mask)) |
1332 | return -EINVAL; | |
1333 | if (dir) | |
1334 | *dir = 0; | |
1335 | return snd_mask_value(mask); | |
1336 | } | |
1337 | if (hw_is_interval(var)) { | |
877211f5 | 1338 | const struct snd_interval *i = hw_param_interval_c(params, var); |
1da177e4 LT |
1339 | if (!snd_interval_single(i)) |
1340 | return -EINVAL; | |
1341 | if (dir) | |
1342 | *dir = i->openmin; | |
1343 | return snd_interval_value(i); | |
1344 | } | |
1da177e4 LT |
1345 | return -EINVAL; |
1346 | } | |
1347 | ||
e88e8ae6 | 1348 | EXPORT_SYMBOL(snd_pcm_hw_param_value); |
1da177e4 | 1349 | |
877211f5 | 1350 | void _snd_pcm_hw_param_setempty(struct snd_pcm_hw_params *params, |
1da177e4 LT |
1351 | snd_pcm_hw_param_t var) |
1352 | { | |
1353 | if (hw_is_mask(var)) { | |
1354 | snd_mask_none(hw_param_mask(params, var)); | |
1355 | params->cmask |= 1 << var; | |
1356 | params->rmask |= 1 << var; | |
1357 | } else if (hw_is_interval(var)) { | |
1358 | snd_interval_none(hw_param_interval(params, var)); | |
1359 | params->cmask |= 1 << var; | |
1360 | params->rmask |= 1 << var; | |
1361 | } else { | |
1362 | snd_BUG(); | |
1363 | } | |
1364 | } | |
1365 | ||
e88e8ae6 | 1366 | EXPORT_SYMBOL(_snd_pcm_hw_param_setempty); |
1da177e4 | 1367 | |
877211f5 | 1368 | static int _snd_pcm_hw_param_first(struct snd_pcm_hw_params *params, |
123992f7 | 1369 | snd_pcm_hw_param_t var) |
1da177e4 LT |
1370 | { |
1371 | int changed; | |
1372 | if (hw_is_mask(var)) | |
1373 | changed = snd_mask_refine_first(hw_param_mask(params, var)); | |
1374 | else if (hw_is_interval(var)) | |
1375 | changed = snd_interval_refine_first(hw_param_interval(params, var)); | |
2f4ca8e5 | 1376 | else |
1da177e4 | 1377 | return -EINVAL; |
1da177e4 LT |
1378 | if (changed) { |
1379 | params->cmask |= 1 << var; | |
1380 | params->rmask |= 1 << var; | |
1381 | } | |
1382 | return changed; | |
1383 | } | |
1384 | ||
1385 | ||
1386 | /** | |
1c85cc64 | 1387 | * snd_pcm_hw_param_first - refine config space and return minimum value |
df8db936 TI |
1388 | * @pcm: PCM instance |
1389 | * @params: the hw_params instance | |
1390 | * @var: parameter to retrieve | |
1c85cc64 | 1391 | * @dir: pointer to the direction (-1,0,1) or %NULL |
1da177e4 | 1392 | * |
1c85cc64 | 1393 | * Inside configuration space defined by @params remove from @var all |
1da177e4 LT |
1394 | * values > minimum. Reduce configuration space accordingly. |
1395 | * Return the minimum. | |
1396 | */ | |
e88e8ae6 TI |
1397 | int snd_pcm_hw_param_first(struct snd_pcm_substream *pcm, |
1398 | struct snd_pcm_hw_params *params, | |
1399 | snd_pcm_hw_param_t var, int *dir) | |
1da177e4 LT |
1400 | { |
1401 | int changed = _snd_pcm_hw_param_first(params, var); | |
1402 | if (changed < 0) | |
1403 | return changed; | |
1404 | if (params->rmask) { | |
1405 | int err = snd_pcm_hw_refine(pcm, params); | |
7eaa943c TI |
1406 | if (snd_BUG_ON(err < 0)) |
1407 | return err; | |
1da177e4 LT |
1408 | } |
1409 | return snd_pcm_hw_param_value(params, var, dir); | |
1410 | } | |
1411 | ||
e88e8ae6 TI |
1412 | EXPORT_SYMBOL(snd_pcm_hw_param_first); |
1413 | ||
877211f5 | 1414 | static int _snd_pcm_hw_param_last(struct snd_pcm_hw_params *params, |
123992f7 | 1415 | snd_pcm_hw_param_t var) |
1da177e4 LT |
1416 | { |
1417 | int changed; | |
1418 | if (hw_is_mask(var)) | |
1419 | changed = snd_mask_refine_last(hw_param_mask(params, var)); | |
1420 | else if (hw_is_interval(var)) | |
1421 | changed = snd_interval_refine_last(hw_param_interval(params, var)); | |
2f4ca8e5 | 1422 | else |
1da177e4 | 1423 | return -EINVAL; |
1da177e4 LT |
1424 | if (changed) { |
1425 | params->cmask |= 1 << var; | |
1426 | params->rmask |= 1 << var; | |
1427 | } | |
1428 | return changed; | |
1429 | } | |
1430 | ||
1431 | ||
1432 | /** | |
1c85cc64 | 1433 | * snd_pcm_hw_param_last - refine config space and return maximum value |
df8db936 TI |
1434 | * @pcm: PCM instance |
1435 | * @params: the hw_params instance | |
1436 | * @var: parameter to retrieve | |
1c85cc64 | 1437 | * @dir: pointer to the direction (-1,0,1) or %NULL |
1da177e4 | 1438 | * |
1c85cc64 | 1439 | * Inside configuration space defined by @params remove from @var all |
1da177e4 LT |
1440 | * values < maximum. Reduce configuration space accordingly. |
1441 | * Return the maximum. | |
1442 | */ | |
e88e8ae6 TI |
1443 | int snd_pcm_hw_param_last(struct snd_pcm_substream *pcm, |
1444 | struct snd_pcm_hw_params *params, | |
1445 | snd_pcm_hw_param_t var, int *dir) | |
1da177e4 LT |
1446 | { |
1447 | int changed = _snd_pcm_hw_param_last(params, var); | |
1448 | if (changed < 0) | |
1449 | return changed; | |
1450 | if (params->rmask) { | |
1451 | int err = snd_pcm_hw_refine(pcm, params); | |
7eaa943c TI |
1452 | if (snd_BUG_ON(err < 0)) |
1453 | return err; | |
1da177e4 LT |
1454 | } |
1455 | return snd_pcm_hw_param_value(params, var, dir); | |
1456 | } | |
1457 | ||
e88e8ae6 | 1458 | EXPORT_SYMBOL(snd_pcm_hw_param_last); |
1da177e4 LT |
1459 | |
1460 | /** | |
1c85cc64 | 1461 | * snd_pcm_hw_param_choose - choose a configuration defined by @params |
df8db936 TI |
1462 | * @pcm: PCM instance |
1463 | * @params: the hw_params instance | |
1da177e4 | 1464 | * |
1c85cc64 | 1465 | * Choose one configuration from configuration space defined by @params. |
1da177e4 LT |
1466 | * The configuration chosen is that obtained fixing in this order: |
1467 | * first access, first format, first subformat, min channels, | |
1468 | * min rate, min period time, max buffer size, min tick time | |
1469 | */ | |
2f4ca8e5 TI |
1470 | int snd_pcm_hw_params_choose(struct snd_pcm_substream *pcm, |
1471 | struct snd_pcm_hw_params *params) | |
1da177e4 | 1472 | { |
2f4ca8e5 TI |
1473 | static int vars[] = { |
1474 | SNDRV_PCM_HW_PARAM_ACCESS, | |
1475 | SNDRV_PCM_HW_PARAM_FORMAT, | |
1476 | SNDRV_PCM_HW_PARAM_SUBFORMAT, | |
1477 | SNDRV_PCM_HW_PARAM_CHANNELS, | |
1478 | SNDRV_PCM_HW_PARAM_RATE, | |
1479 | SNDRV_PCM_HW_PARAM_PERIOD_TIME, | |
1480 | SNDRV_PCM_HW_PARAM_BUFFER_SIZE, | |
1481 | SNDRV_PCM_HW_PARAM_TICK_TIME, | |
1482 | -1 | |
1483 | }; | |
1484 | int err, *v; | |
1da177e4 | 1485 | |
2f4ca8e5 TI |
1486 | for (v = vars; *v != -1; v++) { |
1487 | if (*v != SNDRV_PCM_HW_PARAM_BUFFER_SIZE) | |
1488 | err = snd_pcm_hw_param_first(pcm, params, *v, NULL); | |
1489 | else | |
1490 | err = snd_pcm_hw_param_last(pcm, params, *v, NULL); | |
7eaa943c TI |
1491 | if (snd_BUG_ON(err < 0)) |
1492 | return err; | |
2f4ca8e5 | 1493 | } |
1da177e4 LT |
1494 | return 0; |
1495 | } | |
1496 | ||
877211f5 | 1497 | static int snd_pcm_lib_ioctl_reset(struct snd_pcm_substream *substream, |
1da177e4 LT |
1498 | void *arg) |
1499 | { | |
877211f5 | 1500 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1501 | unsigned long flags; |
1502 | snd_pcm_stream_lock_irqsave(substream, flags); | |
1503 | if (snd_pcm_running(substream) && | |
1504 | snd_pcm_update_hw_ptr(substream) >= 0) | |
1505 | runtime->status->hw_ptr %= runtime->buffer_size; | |
1506 | else | |
1507 | runtime->status->hw_ptr = 0; | |
1508 | snd_pcm_stream_unlock_irqrestore(substream, flags); | |
1509 | return 0; | |
1510 | } | |
1511 | ||
877211f5 | 1512 | static int snd_pcm_lib_ioctl_channel_info(struct snd_pcm_substream *substream, |
1da177e4 LT |
1513 | void *arg) |
1514 | { | |
877211f5 TI |
1515 | struct snd_pcm_channel_info *info = arg; |
1516 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1da177e4 LT |
1517 | int width; |
1518 | if (!(runtime->info & SNDRV_PCM_INFO_MMAP)) { | |
1519 | info->offset = -1; | |
1520 | return 0; | |
1521 | } | |
1522 | width = snd_pcm_format_physical_width(runtime->format); | |
1523 | if (width < 0) | |
1524 | return width; | |
1525 | info->offset = 0; | |
1526 | switch (runtime->access) { | |
1527 | case SNDRV_PCM_ACCESS_MMAP_INTERLEAVED: | |
1528 | case SNDRV_PCM_ACCESS_RW_INTERLEAVED: | |
1529 | info->first = info->channel * width; | |
1530 | info->step = runtime->channels * width; | |
1531 | break; | |
1532 | case SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED: | |
1533 | case SNDRV_PCM_ACCESS_RW_NONINTERLEAVED: | |
1534 | { | |
1535 | size_t size = runtime->dma_bytes / runtime->channels; | |
1536 | info->first = info->channel * size * 8; | |
1537 | info->step = width; | |
1538 | break; | |
1539 | } | |
1540 | default: | |
1541 | snd_BUG(); | |
1542 | break; | |
1543 | } | |
1544 | return 0; | |
1545 | } | |
1546 | ||
8bea869c JK |
1547 | static int snd_pcm_lib_ioctl_fifo_size(struct snd_pcm_substream *substream, |
1548 | void *arg) | |
1549 | { | |
1550 | struct snd_pcm_hw_params *params = arg; | |
1551 | snd_pcm_format_t format; | |
1552 | int channels, width; | |
1553 | ||
1554 | params->fifo_size = substream->runtime->hw.fifo_size; | |
1555 | if (!(substream->runtime->hw.info & SNDRV_PCM_INFO_FIFO_IN_FRAMES)) { | |
1556 | format = params_format(params); | |
1557 | channels = params_channels(params); | |
1558 | width = snd_pcm_format_physical_width(format); | |
1559 | params->fifo_size /= width * channels; | |
1560 | } | |
1561 | return 0; | |
1562 | } | |
1563 | ||
1da177e4 LT |
1564 | /** |
1565 | * snd_pcm_lib_ioctl - a generic PCM ioctl callback | |
1566 | * @substream: the pcm substream instance | |
1567 | * @cmd: ioctl command | |
1568 | * @arg: ioctl argument | |
1569 | * | |
1570 | * Processes the generic ioctl commands for PCM. | |
1571 | * Can be passed as the ioctl callback for PCM ops. | |
1572 | * | |
1573 | * Returns zero if successful, or a negative error code on failure. | |
1574 | */ | |
877211f5 | 1575 | int snd_pcm_lib_ioctl(struct snd_pcm_substream *substream, |
1da177e4 LT |
1576 | unsigned int cmd, void *arg) |
1577 | { | |
1578 | switch (cmd) { | |
1579 | case SNDRV_PCM_IOCTL1_INFO: | |
1580 | return 0; | |
1581 | case SNDRV_PCM_IOCTL1_RESET: | |
1582 | return snd_pcm_lib_ioctl_reset(substream, arg); | |
1583 | case SNDRV_PCM_IOCTL1_CHANNEL_INFO: | |
1584 | return snd_pcm_lib_ioctl_channel_info(substream, arg); | |
8bea869c JK |
1585 | case SNDRV_PCM_IOCTL1_FIFO_SIZE: |
1586 | return snd_pcm_lib_ioctl_fifo_size(substream, arg); | |
1da177e4 LT |
1587 | } |
1588 | return -ENXIO; | |
1589 | } | |
1590 | ||
e88e8ae6 TI |
1591 | EXPORT_SYMBOL(snd_pcm_lib_ioctl); |
1592 | ||
1da177e4 LT |
1593 | /** |
1594 | * snd_pcm_period_elapsed - update the pcm status for the next period | |
1595 | * @substream: the pcm substream instance | |
1596 | * | |
1597 | * This function is called from the interrupt handler when the | |
1598 | * PCM has processed the period size. It will update the current | |
31e8960b | 1599 | * pointer, wake up sleepers, etc. |
1da177e4 LT |
1600 | * |
1601 | * Even if more than one periods have elapsed since the last call, you | |
1602 | * have to call this only once. | |
1603 | */ | |
877211f5 | 1604 | void snd_pcm_period_elapsed(struct snd_pcm_substream *substream) |
1da177e4 | 1605 | { |
877211f5 | 1606 | struct snd_pcm_runtime *runtime; |
1da177e4 LT |
1607 | unsigned long flags; |
1608 | ||
7eaa943c TI |
1609 | if (PCM_RUNTIME_CHECK(substream)) |
1610 | return; | |
1da177e4 | 1611 | runtime = substream->runtime; |
1da177e4 LT |
1612 | |
1613 | if (runtime->transfer_ack_begin) | |
1614 | runtime->transfer_ack_begin(substream); | |
1615 | ||
1616 | snd_pcm_stream_lock_irqsave(substream, flags); | |
1617 | if (!snd_pcm_running(substream) || | |
1618 | snd_pcm_update_hw_ptr_interrupt(substream) < 0) | |
1619 | goto _end; | |
1620 | ||
1621 | if (substream->timer_running) | |
1622 | snd_timer_interrupt(substream->timer, 1); | |
1da177e4 LT |
1623 | _end: |
1624 | snd_pcm_stream_unlock_irqrestore(substream, flags); | |
1625 | if (runtime->transfer_ack_end) | |
1626 | runtime->transfer_ack_end(substream); | |
1627 | kill_fasync(&runtime->fasync, SIGIO, POLL_IN); | |
1628 | } | |
1629 | ||
e88e8ae6 TI |
1630 | EXPORT_SYMBOL(snd_pcm_period_elapsed); |
1631 | ||
13075510 TI |
1632 | /* |
1633 | * Wait until avail_min data becomes available | |
1634 | * Returns a negative error code if any error occurs during operation. | |
1635 | * The available space is stored on availp. When err = 0 and avail = 0 | |
1636 | * on the capture stream, it indicates the stream is in DRAINING state. | |
1637 | */ | |
1638 | static int wait_for_avail_min(struct snd_pcm_substream *substream, | |
1639 | snd_pcm_uframes_t *availp) | |
1640 | { | |
1641 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1642 | int is_playback = substream->stream == SNDRV_PCM_STREAM_PLAYBACK; | |
1643 | wait_queue_t wait; | |
1644 | int err = 0; | |
1645 | snd_pcm_uframes_t avail = 0; | |
1646 | long tout; | |
1647 | ||
1648 | init_waitqueue_entry(&wait, current); | |
1649 | add_wait_queue(&runtime->sleep, &wait); | |
1650 | for (;;) { | |
1651 | if (signal_pending(current)) { | |
1652 | err = -ERESTARTSYS; | |
1653 | break; | |
1654 | } | |
1655 | set_current_state(TASK_INTERRUPTIBLE); | |
1656 | snd_pcm_stream_unlock_irq(substream); | |
1657 | tout = schedule_timeout(msecs_to_jiffies(10000)); | |
1658 | snd_pcm_stream_lock_irq(substream); | |
1659 | switch (runtime->status->state) { | |
1660 | case SNDRV_PCM_STATE_SUSPENDED: | |
1661 | err = -ESTRPIPE; | |
1662 | goto _endloop; | |
1663 | case SNDRV_PCM_STATE_XRUN: | |
1664 | err = -EPIPE; | |
1665 | goto _endloop; | |
1666 | case SNDRV_PCM_STATE_DRAINING: | |
1667 | if (is_playback) | |
1668 | err = -EPIPE; | |
1669 | else | |
1670 | avail = 0; /* indicate draining */ | |
1671 | goto _endloop; | |
1672 | case SNDRV_PCM_STATE_OPEN: | |
1673 | case SNDRV_PCM_STATE_SETUP: | |
1674 | case SNDRV_PCM_STATE_DISCONNECTED: | |
1675 | err = -EBADFD; | |
1676 | goto _endloop; | |
1677 | } | |
1678 | if (!tout) { | |
1679 | snd_printd("%s write error (DMA or IRQ trouble?)\n", | |
1680 | is_playback ? "playback" : "capture"); | |
1681 | err = -EIO; | |
1682 | break; | |
1683 | } | |
1684 | if (is_playback) | |
1685 | avail = snd_pcm_playback_avail(runtime); | |
1686 | else | |
1687 | avail = snd_pcm_capture_avail(runtime); | |
1688 | if (avail >= runtime->control->avail_min) | |
1689 | break; | |
1690 | } | |
1691 | _endloop: | |
1692 | remove_wait_queue(&runtime->sleep, &wait); | |
1693 | *availp = avail; | |
1694 | return err; | |
1695 | } | |
1696 | ||
877211f5 | 1697 | static int snd_pcm_lib_write_transfer(struct snd_pcm_substream *substream, |
1da177e4 LT |
1698 | unsigned int hwoff, |
1699 | unsigned long data, unsigned int off, | |
1700 | snd_pcm_uframes_t frames) | |
1701 | { | |
877211f5 | 1702 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1703 | int err; |
1704 | char __user *buf = (char __user *) data + frames_to_bytes(runtime, off); | |
1705 | if (substream->ops->copy) { | |
1706 | if ((err = substream->ops->copy(substream, -1, hwoff, buf, frames)) < 0) | |
1707 | return err; | |
1708 | } else { | |
1709 | char *hwbuf = runtime->dma_area + frames_to_bytes(runtime, hwoff); | |
1da177e4 LT |
1710 | if (copy_from_user(hwbuf, buf, frames_to_bytes(runtime, frames))) |
1711 | return -EFAULT; | |
1712 | } | |
1713 | return 0; | |
1714 | } | |
1715 | ||
877211f5 | 1716 | typedef int (*transfer_f)(struct snd_pcm_substream *substream, unsigned int hwoff, |
1da177e4 LT |
1717 | unsigned long data, unsigned int off, |
1718 | snd_pcm_uframes_t size); | |
1719 | ||
877211f5 | 1720 | static snd_pcm_sframes_t snd_pcm_lib_write1(struct snd_pcm_substream *substream, |
1da177e4 LT |
1721 | unsigned long data, |
1722 | snd_pcm_uframes_t size, | |
1723 | int nonblock, | |
1724 | transfer_f transfer) | |
1725 | { | |
877211f5 | 1726 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1727 | snd_pcm_uframes_t xfer = 0; |
1728 | snd_pcm_uframes_t offset = 0; | |
1729 | int err = 0; | |
1730 | ||
1731 | if (size == 0) | |
1732 | return 0; | |
1da177e4 LT |
1733 | |
1734 | snd_pcm_stream_lock_irq(substream); | |
1735 | switch (runtime->status->state) { | |
1736 | case SNDRV_PCM_STATE_PREPARED: | |
1737 | case SNDRV_PCM_STATE_RUNNING: | |
1738 | case SNDRV_PCM_STATE_PAUSED: | |
1739 | break; | |
1740 | case SNDRV_PCM_STATE_XRUN: | |
1741 | err = -EPIPE; | |
1742 | goto _end_unlock; | |
1743 | case SNDRV_PCM_STATE_SUSPENDED: | |
1744 | err = -ESTRPIPE; | |
1745 | goto _end_unlock; | |
1746 | default: | |
1747 | err = -EBADFD; | |
1748 | goto _end_unlock; | |
1749 | } | |
1750 | ||
1751 | while (size > 0) { | |
1752 | snd_pcm_uframes_t frames, appl_ptr, appl_ofs; | |
1753 | snd_pcm_uframes_t avail; | |
1754 | snd_pcm_uframes_t cont; | |
31e8960b | 1755 | if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) |
1da177e4 LT |
1756 | snd_pcm_update_hw_ptr(substream); |
1757 | avail = snd_pcm_playback_avail(runtime); | |
13075510 | 1758 | if (!avail) { |
1da177e4 LT |
1759 | if (nonblock) { |
1760 | err = -EAGAIN; | |
1761 | goto _end_unlock; | |
1762 | } | |
13075510 TI |
1763 | err = wait_for_avail_min(substream, &avail); |
1764 | if (err < 0) | |
443feb88 | 1765 | goto _end_unlock; |
1da177e4 | 1766 | } |
1da177e4 LT |
1767 | frames = size > avail ? avail : size; |
1768 | cont = runtime->buffer_size - runtime->control->appl_ptr % runtime->buffer_size; | |
1769 | if (frames > cont) | |
1770 | frames = cont; | |
7eaa943c TI |
1771 | if (snd_BUG_ON(!frames)) { |
1772 | snd_pcm_stream_unlock_irq(substream); | |
1773 | return -EINVAL; | |
1774 | } | |
1da177e4 LT |
1775 | appl_ptr = runtime->control->appl_ptr; |
1776 | appl_ofs = appl_ptr % runtime->buffer_size; | |
1777 | snd_pcm_stream_unlock_irq(substream); | |
1778 | if ((err = transfer(substream, appl_ofs, data, offset, frames)) < 0) | |
1779 | goto _end; | |
1780 | snd_pcm_stream_lock_irq(substream); | |
1781 | switch (runtime->status->state) { | |
1782 | case SNDRV_PCM_STATE_XRUN: | |
1783 | err = -EPIPE; | |
1784 | goto _end_unlock; | |
1785 | case SNDRV_PCM_STATE_SUSPENDED: | |
1786 | err = -ESTRPIPE; | |
1787 | goto _end_unlock; | |
1788 | default: | |
1789 | break; | |
1790 | } | |
1791 | appl_ptr += frames; | |
1792 | if (appl_ptr >= runtime->boundary) | |
1793 | appl_ptr -= runtime->boundary; | |
1794 | runtime->control->appl_ptr = appl_ptr; | |
1795 | if (substream->ops->ack) | |
1796 | substream->ops->ack(substream); | |
1797 | ||
1798 | offset += frames; | |
1799 | size -= frames; | |
1800 | xfer += frames; | |
1801 | if (runtime->status->state == SNDRV_PCM_STATE_PREPARED && | |
1802 | snd_pcm_playback_hw_avail(runtime) >= (snd_pcm_sframes_t)runtime->start_threshold) { | |
1803 | err = snd_pcm_start(substream); | |
1804 | if (err < 0) | |
1805 | goto _end_unlock; | |
1806 | } | |
1da177e4 LT |
1807 | } |
1808 | _end_unlock: | |
1809 | snd_pcm_stream_unlock_irq(substream); | |
1810 | _end: | |
1811 | return xfer > 0 ? (snd_pcm_sframes_t)xfer : err; | |
1812 | } | |
1813 | ||
7eaa943c TI |
1814 | /* sanity-check for read/write methods */ |
1815 | static int pcm_sanity_check(struct snd_pcm_substream *substream) | |
1da177e4 | 1816 | { |
877211f5 | 1817 | struct snd_pcm_runtime *runtime; |
7eaa943c TI |
1818 | if (PCM_RUNTIME_CHECK(substream)) |
1819 | return -ENXIO; | |
1da177e4 | 1820 | runtime = substream->runtime; |
7eaa943c TI |
1821 | if (snd_BUG_ON(!substream->ops->copy && !runtime->dma_area)) |
1822 | return -EINVAL; | |
1da177e4 LT |
1823 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) |
1824 | return -EBADFD; | |
7eaa943c TI |
1825 | return 0; |
1826 | } | |
1827 | ||
1828 | snd_pcm_sframes_t snd_pcm_lib_write(struct snd_pcm_substream *substream, const void __user *buf, snd_pcm_uframes_t size) | |
1829 | { | |
1830 | struct snd_pcm_runtime *runtime; | |
1831 | int nonblock; | |
1832 | int err; | |
1da177e4 | 1833 | |
7eaa943c TI |
1834 | err = pcm_sanity_check(substream); |
1835 | if (err < 0) | |
1836 | return err; | |
1837 | runtime = substream->runtime; | |
0df63e44 | 1838 | nonblock = !!(substream->f_flags & O_NONBLOCK); |
1da177e4 LT |
1839 | |
1840 | if (runtime->access != SNDRV_PCM_ACCESS_RW_INTERLEAVED && | |
1841 | runtime->channels > 1) | |
1842 | return -EINVAL; | |
1843 | return snd_pcm_lib_write1(substream, (unsigned long)buf, size, nonblock, | |
1844 | snd_pcm_lib_write_transfer); | |
1845 | } | |
1846 | ||
e88e8ae6 TI |
1847 | EXPORT_SYMBOL(snd_pcm_lib_write); |
1848 | ||
877211f5 | 1849 | static int snd_pcm_lib_writev_transfer(struct snd_pcm_substream *substream, |
1da177e4 LT |
1850 | unsigned int hwoff, |
1851 | unsigned long data, unsigned int off, | |
1852 | snd_pcm_uframes_t frames) | |
1853 | { | |
877211f5 | 1854 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1855 | int err; |
1856 | void __user **bufs = (void __user **)data; | |
1857 | int channels = runtime->channels; | |
1858 | int c; | |
1859 | if (substream->ops->copy) { | |
7eaa943c TI |
1860 | if (snd_BUG_ON(!substream->ops->silence)) |
1861 | return -EINVAL; | |
1da177e4 LT |
1862 | for (c = 0; c < channels; ++c, ++bufs) { |
1863 | if (*bufs == NULL) { | |
1864 | if ((err = substream->ops->silence(substream, c, hwoff, frames)) < 0) | |
1865 | return err; | |
1866 | } else { | |
1867 | char __user *buf = *bufs + samples_to_bytes(runtime, off); | |
1868 | if ((err = substream->ops->copy(substream, c, hwoff, buf, frames)) < 0) | |
1869 | return err; | |
1870 | } | |
1871 | } | |
1872 | } else { | |
1873 | /* default transfer behaviour */ | |
1874 | size_t dma_csize = runtime->dma_bytes / channels; | |
1da177e4 LT |
1875 | for (c = 0; c < channels; ++c, ++bufs) { |
1876 | char *hwbuf = runtime->dma_area + (c * dma_csize) + samples_to_bytes(runtime, hwoff); | |
1877 | if (*bufs == NULL) { | |
1878 | snd_pcm_format_set_silence(runtime->format, hwbuf, frames); | |
1879 | } else { | |
1880 | char __user *buf = *bufs + samples_to_bytes(runtime, off); | |
1881 | if (copy_from_user(hwbuf, buf, samples_to_bytes(runtime, frames))) | |
1882 | return -EFAULT; | |
1883 | } | |
1884 | } | |
1885 | } | |
1886 | return 0; | |
1887 | } | |
1888 | ||
877211f5 | 1889 | snd_pcm_sframes_t snd_pcm_lib_writev(struct snd_pcm_substream *substream, |
1da177e4 LT |
1890 | void __user **bufs, |
1891 | snd_pcm_uframes_t frames) | |
1892 | { | |
877211f5 | 1893 | struct snd_pcm_runtime *runtime; |
1da177e4 | 1894 | int nonblock; |
7eaa943c | 1895 | int err; |
1da177e4 | 1896 | |
7eaa943c TI |
1897 | err = pcm_sanity_check(substream); |
1898 | if (err < 0) | |
1899 | return err; | |
1da177e4 | 1900 | runtime = substream->runtime; |
0df63e44 | 1901 | nonblock = !!(substream->f_flags & O_NONBLOCK); |
1da177e4 LT |
1902 | |
1903 | if (runtime->access != SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) | |
1904 | return -EINVAL; | |
1905 | return snd_pcm_lib_write1(substream, (unsigned long)bufs, frames, | |
1906 | nonblock, snd_pcm_lib_writev_transfer); | |
1907 | } | |
1908 | ||
e88e8ae6 TI |
1909 | EXPORT_SYMBOL(snd_pcm_lib_writev); |
1910 | ||
877211f5 | 1911 | static int snd_pcm_lib_read_transfer(struct snd_pcm_substream *substream, |
1da177e4 LT |
1912 | unsigned int hwoff, |
1913 | unsigned long data, unsigned int off, | |
1914 | snd_pcm_uframes_t frames) | |
1915 | { | |
877211f5 | 1916 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1917 | int err; |
1918 | char __user *buf = (char __user *) data + frames_to_bytes(runtime, off); | |
1919 | if (substream->ops->copy) { | |
1920 | if ((err = substream->ops->copy(substream, -1, hwoff, buf, frames)) < 0) | |
1921 | return err; | |
1922 | } else { | |
1923 | char *hwbuf = runtime->dma_area + frames_to_bytes(runtime, hwoff); | |
1da177e4 LT |
1924 | if (copy_to_user(buf, hwbuf, frames_to_bytes(runtime, frames))) |
1925 | return -EFAULT; | |
1926 | } | |
1927 | return 0; | |
1928 | } | |
1929 | ||
877211f5 | 1930 | static snd_pcm_sframes_t snd_pcm_lib_read1(struct snd_pcm_substream *substream, |
1da177e4 LT |
1931 | unsigned long data, |
1932 | snd_pcm_uframes_t size, | |
1933 | int nonblock, | |
1934 | transfer_f transfer) | |
1935 | { | |
877211f5 | 1936 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1937 | snd_pcm_uframes_t xfer = 0; |
1938 | snd_pcm_uframes_t offset = 0; | |
1939 | int err = 0; | |
1940 | ||
1941 | if (size == 0) | |
1942 | return 0; | |
1da177e4 LT |
1943 | |
1944 | snd_pcm_stream_lock_irq(substream); | |
1945 | switch (runtime->status->state) { | |
1946 | case SNDRV_PCM_STATE_PREPARED: | |
1947 | if (size >= runtime->start_threshold) { | |
1948 | err = snd_pcm_start(substream); | |
1949 | if (err < 0) | |
1950 | goto _end_unlock; | |
1951 | } | |
1952 | break; | |
1953 | case SNDRV_PCM_STATE_DRAINING: | |
1954 | case SNDRV_PCM_STATE_RUNNING: | |
1955 | case SNDRV_PCM_STATE_PAUSED: | |
1956 | break; | |
1957 | case SNDRV_PCM_STATE_XRUN: | |
1958 | err = -EPIPE; | |
1959 | goto _end_unlock; | |
1960 | case SNDRV_PCM_STATE_SUSPENDED: | |
1961 | err = -ESTRPIPE; | |
1962 | goto _end_unlock; | |
1963 | default: | |
1964 | err = -EBADFD; | |
1965 | goto _end_unlock; | |
1966 | } | |
1967 | ||
1968 | while (size > 0) { | |
1969 | snd_pcm_uframes_t frames, appl_ptr, appl_ofs; | |
1970 | snd_pcm_uframes_t avail; | |
1971 | snd_pcm_uframes_t cont; | |
31e8960b | 1972 | if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) |
1da177e4 | 1973 | snd_pcm_update_hw_ptr(substream); |
1da177e4 | 1974 | avail = snd_pcm_capture_avail(runtime); |
13075510 TI |
1975 | if (!avail) { |
1976 | if (runtime->status->state == | |
1977 | SNDRV_PCM_STATE_DRAINING) { | |
1978 | snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP); | |
1da177e4 LT |
1979 | goto _end_unlock; |
1980 | } | |
1da177e4 LT |
1981 | if (nonblock) { |
1982 | err = -EAGAIN; | |
1983 | goto _end_unlock; | |
1984 | } | |
13075510 TI |
1985 | err = wait_for_avail_min(substream, &avail); |
1986 | if (err < 0) | |
443feb88 | 1987 | goto _end_unlock; |
13075510 TI |
1988 | if (!avail) |
1989 | continue; /* draining */ | |
1da177e4 | 1990 | } |
1da177e4 LT |
1991 | frames = size > avail ? avail : size; |
1992 | cont = runtime->buffer_size - runtime->control->appl_ptr % runtime->buffer_size; | |
1993 | if (frames > cont) | |
1994 | frames = cont; | |
7eaa943c TI |
1995 | if (snd_BUG_ON(!frames)) { |
1996 | snd_pcm_stream_unlock_irq(substream); | |
1997 | return -EINVAL; | |
1998 | } | |
1da177e4 LT |
1999 | appl_ptr = runtime->control->appl_ptr; |
2000 | appl_ofs = appl_ptr % runtime->buffer_size; | |
2001 | snd_pcm_stream_unlock_irq(substream); | |
2002 | if ((err = transfer(substream, appl_ofs, data, offset, frames)) < 0) | |
2003 | goto _end; | |
2004 | snd_pcm_stream_lock_irq(substream); | |
2005 | switch (runtime->status->state) { | |
2006 | case SNDRV_PCM_STATE_XRUN: | |
2007 | err = -EPIPE; | |
2008 | goto _end_unlock; | |
2009 | case SNDRV_PCM_STATE_SUSPENDED: | |
2010 | err = -ESTRPIPE; | |
2011 | goto _end_unlock; | |
2012 | default: | |
2013 | break; | |
2014 | } | |
2015 | appl_ptr += frames; | |
2016 | if (appl_ptr >= runtime->boundary) | |
2017 | appl_ptr -= runtime->boundary; | |
2018 | runtime->control->appl_ptr = appl_ptr; | |
2019 | if (substream->ops->ack) | |
2020 | substream->ops->ack(substream); | |
2021 | ||
2022 | offset += frames; | |
2023 | size -= frames; | |
2024 | xfer += frames; | |
1da177e4 LT |
2025 | } |
2026 | _end_unlock: | |
2027 | snd_pcm_stream_unlock_irq(substream); | |
2028 | _end: | |
2029 | return xfer > 0 ? (snd_pcm_sframes_t)xfer : err; | |
2030 | } | |
2031 | ||
877211f5 | 2032 | snd_pcm_sframes_t snd_pcm_lib_read(struct snd_pcm_substream *substream, void __user *buf, snd_pcm_uframes_t size) |
1da177e4 | 2033 | { |
877211f5 | 2034 | struct snd_pcm_runtime *runtime; |
1da177e4 | 2035 | int nonblock; |
7eaa943c | 2036 | int err; |
1da177e4 | 2037 | |
7eaa943c TI |
2038 | err = pcm_sanity_check(substream); |
2039 | if (err < 0) | |
2040 | return err; | |
1da177e4 | 2041 | runtime = substream->runtime; |
0df63e44 | 2042 | nonblock = !!(substream->f_flags & O_NONBLOCK); |
1da177e4 LT |
2043 | if (runtime->access != SNDRV_PCM_ACCESS_RW_INTERLEAVED) |
2044 | return -EINVAL; | |
2045 | return snd_pcm_lib_read1(substream, (unsigned long)buf, size, nonblock, snd_pcm_lib_read_transfer); | |
2046 | } | |
2047 | ||
e88e8ae6 TI |
2048 | EXPORT_SYMBOL(snd_pcm_lib_read); |
2049 | ||
877211f5 | 2050 | static int snd_pcm_lib_readv_transfer(struct snd_pcm_substream *substream, |
1da177e4 LT |
2051 | unsigned int hwoff, |
2052 | unsigned long data, unsigned int off, | |
2053 | snd_pcm_uframes_t frames) | |
2054 | { | |
877211f5 | 2055 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
2056 | int err; |
2057 | void __user **bufs = (void __user **)data; | |
2058 | int channels = runtime->channels; | |
2059 | int c; | |
2060 | if (substream->ops->copy) { | |
2061 | for (c = 0; c < channels; ++c, ++bufs) { | |
2062 | char __user *buf; | |
2063 | if (*bufs == NULL) | |
2064 | continue; | |
2065 | buf = *bufs + samples_to_bytes(runtime, off); | |
2066 | if ((err = substream->ops->copy(substream, c, hwoff, buf, frames)) < 0) | |
2067 | return err; | |
2068 | } | |
2069 | } else { | |
2070 | snd_pcm_uframes_t dma_csize = runtime->dma_bytes / channels; | |
1da177e4 LT |
2071 | for (c = 0; c < channels; ++c, ++bufs) { |
2072 | char *hwbuf; | |
2073 | char __user *buf; | |
2074 | if (*bufs == NULL) | |
2075 | continue; | |
2076 | ||
2077 | hwbuf = runtime->dma_area + (c * dma_csize) + samples_to_bytes(runtime, hwoff); | |
2078 | buf = *bufs + samples_to_bytes(runtime, off); | |
2079 | if (copy_to_user(buf, hwbuf, samples_to_bytes(runtime, frames))) | |
2080 | return -EFAULT; | |
2081 | } | |
2082 | } | |
2083 | return 0; | |
2084 | } | |
2085 | ||
877211f5 | 2086 | snd_pcm_sframes_t snd_pcm_lib_readv(struct snd_pcm_substream *substream, |
1da177e4 LT |
2087 | void __user **bufs, |
2088 | snd_pcm_uframes_t frames) | |
2089 | { | |
877211f5 | 2090 | struct snd_pcm_runtime *runtime; |
1da177e4 | 2091 | int nonblock; |
7eaa943c | 2092 | int err; |
1da177e4 | 2093 | |
7eaa943c TI |
2094 | err = pcm_sanity_check(substream); |
2095 | if (err < 0) | |
2096 | return err; | |
1da177e4 | 2097 | runtime = substream->runtime; |
1da177e4 LT |
2098 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) |
2099 | return -EBADFD; | |
2100 | ||
0df63e44 | 2101 | nonblock = !!(substream->f_flags & O_NONBLOCK); |
1da177e4 LT |
2102 | if (runtime->access != SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) |
2103 | return -EINVAL; | |
2104 | return snd_pcm_lib_read1(substream, (unsigned long)bufs, frames, nonblock, snd_pcm_lib_readv_transfer); | |
2105 | } | |
2106 | ||
1da177e4 | 2107 | EXPORT_SYMBOL(snd_pcm_lib_readv); |