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