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 | * |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software | |
18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
19 | * | |
20 | */ | |
21 | ||
1da177e4 | 22 | #include <linux/mm.h> |
da155d5b | 23 | #include <linux/module.h> |
1da177e4 LT |
24 | #include <linux/file.h> |
25 | #include <linux/slab.h> | |
26 | #include <linux/time.h> | |
e8db0be1 | 27 | #include <linux/pm_qos.h> |
a27bb332 | 28 | #include <linux/aio.h> |
657b1989 | 29 | #include <linux/dma-mapping.h> |
1da177e4 LT |
30 | #include <sound/core.h> |
31 | #include <sound/control.h> | |
32 | #include <sound/info.h> | |
33 | #include <sound/pcm.h> | |
34 | #include <sound/pcm_params.h> | |
35 | #include <sound/timer.h> | |
36 | #include <sound/minors.h> | |
37 | #include <asm/io.h> | |
9fe17b5d TI |
38 | #if defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT) |
39 | #include <dma-coherence.h> | |
40 | #endif | |
1da177e4 LT |
41 | |
42 | /* | |
43 | * Compatibility | |
44 | */ | |
45 | ||
877211f5 | 46 | struct snd_pcm_hw_params_old { |
1da177e4 LT |
47 | unsigned int flags; |
48 | unsigned int masks[SNDRV_PCM_HW_PARAM_SUBFORMAT - | |
49 | SNDRV_PCM_HW_PARAM_ACCESS + 1]; | |
877211f5 | 50 | struct snd_interval intervals[SNDRV_PCM_HW_PARAM_TICK_TIME - |
1da177e4 LT |
51 | SNDRV_PCM_HW_PARAM_SAMPLE_BITS + 1]; |
52 | unsigned int rmask; | |
53 | unsigned int cmask; | |
54 | unsigned int info; | |
55 | unsigned int msbits; | |
56 | unsigned int rate_num; | |
57 | unsigned int rate_den; | |
877211f5 | 58 | snd_pcm_uframes_t fifo_size; |
1da177e4 LT |
59 | unsigned char reserved[64]; |
60 | }; | |
61 | ||
59d48582 | 62 | #ifdef CONFIG_SND_SUPPORT_OLD_API |
877211f5 TI |
63 | #define SNDRV_PCM_IOCTL_HW_REFINE_OLD _IOWR('A', 0x10, struct snd_pcm_hw_params_old) |
64 | #define SNDRV_PCM_IOCTL_HW_PARAMS_OLD _IOWR('A', 0x11, struct snd_pcm_hw_params_old) | |
1da177e4 | 65 | |
877211f5 TI |
66 | static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream, |
67 | struct snd_pcm_hw_params_old __user * _oparams); | |
68 | static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream, | |
69 | struct snd_pcm_hw_params_old __user * _oparams); | |
59d48582 | 70 | #endif |
f87135f5 | 71 | static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream); |
1da177e4 LT |
72 | |
73 | /* | |
74 | * | |
75 | */ | |
76 | ||
7af142f7 TI |
77 | static DEFINE_RWLOCK(snd_pcm_link_rwlock); |
78 | static DECLARE_RWSEM(snd_pcm_link_rwsem); | |
1da177e4 | 79 | |
7af142f7 TI |
80 | void snd_pcm_stream_lock(struct snd_pcm_substream *substream) |
81 | { | |
82 | if (substream->pcm->nonatomic) { | |
83 | down_read(&snd_pcm_link_rwsem); | |
84 | mutex_lock(&substream->self_group.mutex); | |
85 | } else { | |
86 | read_lock(&snd_pcm_link_rwlock); | |
87 | spin_lock(&substream->self_group.lock); | |
88 | } | |
89 | } | |
90 | EXPORT_SYMBOL_GPL(snd_pcm_stream_lock); | |
91 | ||
92 | void snd_pcm_stream_unlock(struct snd_pcm_substream *substream) | |
93 | { | |
94 | if (substream->pcm->nonatomic) { | |
95 | mutex_unlock(&substream->self_group.mutex); | |
96 | up_read(&snd_pcm_link_rwsem); | |
97 | } else { | |
98 | spin_unlock(&substream->self_group.lock); | |
99 | read_unlock(&snd_pcm_link_rwlock); | |
100 | } | |
101 | } | |
102 | EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock); | |
103 | ||
104 | void snd_pcm_stream_lock_irq(struct snd_pcm_substream *substream) | |
105 | { | |
106 | if (!substream->pcm->nonatomic) | |
107 | local_irq_disable(); | |
108 | snd_pcm_stream_lock(substream); | |
109 | } | |
110 | EXPORT_SYMBOL_GPL(snd_pcm_stream_lock_irq); | |
111 | ||
112 | void snd_pcm_stream_unlock_irq(struct snd_pcm_substream *substream) | |
113 | { | |
114 | snd_pcm_stream_unlock(substream); | |
115 | if (!substream->pcm->nonatomic) | |
116 | local_irq_enable(); | |
117 | } | |
118 | EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock_irq); | |
119 | ||
120 | unsigned long _snd_pcm_stream_lock_irqsave(struct snd_pcm_substream *substream) | |
121 | { | |
122 | unsigned long flags = 0; | |
123 | if (!substream->pcm->nonatomic) | |
124 | local_irq_save(flags); | |
125 | snd_pcm_stream_lock(substream); | |
126 | return flags; | |
127 | } | |
128 | EXPORT_SYMBOL_GPL(_snd_pcm_stream_lock_irqsave); | |
129 | ||
130 | void snd_pcm_stream_unlock_irqrestore(struct snd_pcm_substream *substream, | |
131 | unsigned long flags) | |
132 | { | |
133 | snd_pcm_stream_unlock(substream); | |
134 | if (!substream->pcm->nonatomic) | |
135 | local_irq_restore(flags); | |
136 | } | |
137 | EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock_irqrestore); | |
1da177e4 LT |
138 | |
139 | static inline mm_segment_t snd_enter_user(void) | |
140 | { | |
141 | mm_segment_t fs = get_fs(); | |
142 | set_fs(get_ds()); | |
143 | return fs; | |
144 | } | |
145 | ||
146 | static inline void snd_leave_user(mm_segment_t fs) | |
147 | { | |
148 | set_fs(fs); | |
149 | } | |
150 | ||
151 | ||
152 | ||
877211f5 | 153 | int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info) |
1da177e4 | 154 | { |
877211f5 TI |
155 | struct snd_pcm_runtime *runtime; |
156 | struct snd_pcm *pcm = substream->pcm; | |
157 | struct snd_pcm_str *pstr = substream->pstr; | |
1da177e4 | 158 | |
1da177e4 LT |
159 | memset(info, 0, sizeof(*info)); |
160 | info->card = pcm->card->number; | |
161 | info->device = pcm->device; | |
162 | info->stream = substream->stream; | |
163 | info->subdevice = substream->number; | |
164 | strlcpy(info->id, pcm->id, sizeof(info->id)); | |
165 | strlcpy(info->name, pcm->name, sizeof(info->name)); | |
166 | info->dev_class = pcm->dev_class; | |
167 | info->dev_subclass = pcm->dev_subclass; | |
168 | info->subdevices_count = pstr->substream_count; | |
169 | info->subdevices_avail = pstr->substream_count - pstr->substream_opened; | |
170 | strlcpy(info->subname, substream->name, sizeof(info->subname)); | |
171 | runtime = substream->runtime; | |
172 | /* AB: FIXME!!! This is definitely nonsense */ | |
173 | if (runtime) { | |
174 | info->sync = runtime->sync; | |
175 | substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_INFO, info); | |
176 | } | |
177 | return 0; | |
178 | } | |
179 | ||
877211f5 TI |
180 | int snd_pcm_info_user(struct snd_pcm_substream *substream, |
181 | struct snd_pcm_info __user * _info) | |
1da177e4 | 182 | { |
877211f5 | 183 | struct snd_pcm_info *info; |
1da177e4 LT |
184 | int err; |
185 | ||
186 | info = kmalloc(sizeof(*info), GFP_KERNEL); | |
187 | if (! info) | |
188 | return -ENOMEM; | |
189 | err = snd_pcm_info(substream, info); | |
190 | if (err >= 0) { | |
191 | if (copy_to_user(_info, info, sizeof(*info))) | |
192 | err = -EFAULT; | |
193 | } | |
194 | kfree(info); | |
195 | return err; | |
196 | } | |
197 | ||
198 | #undef RULES_DEBUG | |
199 | ||
200 | #ifdef RULES_DEBUG | |
201 | #define HW_PARAM(v) [SNDRV_PCM_HW_PARAM_##v] = #v | |
47023ec7 | 202 | static const char * const snd_pcm_hw_param_names[] = { |
1da177e4 LT |
203 | HW_PARAM(ACCESS), |
204 | HW_PARAM(FORMAT), | |
205 | HW_PARAM(SUBFORMAT), | |
206 | HW_PARAM(SAMPLE_BITS), | |
207 | HW_PARAM(FRAME_BITS), | |
208 | HW_PARAM(CHANNELS), | |
209 | HW_PARAM(RATE), | |
210 | HW_PARAM(PERIOD_TIME), | |
211 | HW_PARAM(PERIOD_SIZE), | |
212 | HW_PARAM(PERIOD_BYTES), | |
213 | HW_PARAM(PERIODS), | |
214 | HW_PARAM(BUFFER_TIME), | |
215 | HW_PARAM(BUFFER_SIZE), | |
216 | HW_PARAM(BUFFER_BYTES), | |
217 | HW_PARAM(TICK_TIME), | |
218 | }; | |
219 | #endif | |
220 | ||
877211f5 TI |
221 | int snd_pcm_hw_refine(struct snd_pcm_substream *substream, |
222 | struct snd_pcm_hw_params *params) | |
1da177e4 LT |
223 | { |
224 | unsigned int k; | |
877211f5 TI |
225 | struct snd_pcm_hardware *hw; |
226 | struct snd_interval *i = NULL; | |
227 | struct snd_mask *m = NULL; | |
228 | struct snd_pcm_hw_constraints *constrs = &substream->runtime->hw_constraints; | |
1da177e4 LT |
229 | unsigned int rstamps[constrs->rules_num]; |
230 | unsigned int vstamps[SNDRV_PCM_HW_PARAM_LAST_INTERVAL + 1]; | |
231 | unsigned int stamp = 2; | |
232 | int changed, again; | |
233 | ||
234 | params->info = 0; | |
235 | params->fifo_size = 0; | |
236 | if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_SAMPLE_BITS)) | |
237 | params->msbits = 0; | |
238 | if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_RATE)) { | |
239 | params->rate_num = 0; | |
240 | params->rate_den = 0; | |
241 | } | |
242 | ||
243 | for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) { | |
244 | m = hw_param_mask(params, k); | |
245 | if (snd_mask_empty(m)) | |
246 | return -EINVAL; | |
247 | if (!(params->rmask & (1 << k))) | |
248 | continue; | |
249 | #ifdef RULES_DEBUG | |
09e56df8 TI |
250 | pr_debug("%s = ", snd_pcm_hw_param_names[k]); |
251 | pr_cont("%04x%04x%04x%04x -> ", m->bits[3], m->bits[2], m->bits[1], m->bits[0]); | |
1da177e4 LT |
252 | #endif |
253 | changed = snd_mask_refine(m, constrs_mask(constrs, k)); | |
254 | #ifdef RULES_DEBUG | |
09e56df8 | 255 | pr_cont("%04x%04x%04x%04x\n", m->bits[3], m->bits[2], m->bits[1], m->bits[0]); |
1da177e4 LT |
256 | #endif |
257 | if (changed) | |
258 | params->cmask |= 1 << k; | |
259 | if (changed < 0) | |
260 | return changed; | |
261 | } | |
262 | ||
263 | for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) { | |
264 | i = hw_param_interval(params, k); | |
265 | if (snd_interval_empty(i)) | |
266 | return -EINVAL; | |
267 | if (!(params->rmask & (1 << k))) | |
268 | continue; | |
269 | #ifdef RULES_DEBUG | |
09e56df8 | 270 | pr_debug("%s = ", snd_pcm_hw_param_names[k]); |
1da177e4 | 271 | if (i->empty) |
09e56df8 | 272 | pr_cont("empty"); |
1da177e4 | 273 | else |
09e56df8 | 274 | pr_cont("%c%u %u%c", |
1da177e4 LT |
275 | i->openmin ? '(' : '[', i->min, |
276 | i->max, i->openmax ? ')' : ']'); | |
09e56df8 | 277 | pr_cont(" -> "); |
1da177e4 LT |
278 | #endif |
279 | changed = snd_interval_refine(i, constrs_interval(constrs, k)); | |
280 | #ifdef RULES_DEBUG | |
281 | if (i->empty) | |
09e56df8 | 282 | pr_cont("empty\n"); |
1da177e4 | 283 | else |
09e56df8 | 284 | pr_cont("%c%u %u%c\n", |
1da177e4 LT |
285 | i->openmin ? '(' : '[', i->min, |
286 | i->max, i->openmax ? ')' : ']'); | |
287 | #endif | |
288 | if (changed) | |
289 | params->cmask |= 1 << k; | |
290 | if (changed < 0) | |
291 | return changed; | |
292 | } | |
293 | ||
294 | for (k = 0; k < constrs->rules_num; k++) | |
295 | rstamps[k] = 0; | |
296 | for (k = 0; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) | |
297 | vstamps[k] = (params->rmask & (1 << k)) ? 1 : 0; | |
298 | do { | |
299 | again = 0; | |
300 | for (k = 0; k < constrs->rules_num; k++) { | |
877211f5 | 301 | struct snd_pcm_hw_rule *r = &constrs->rules[k]; |
1da177e4 LT |
302 | unsigned int d; |
303 | int doit = 0; | |
304 | if (r->cond && !(r->cond & params->flags)) | |
305 | continue; | |
306 | for (d = 0; r->deps[d] >= 0; d++) { | |
307 | if (vstamps[r->deps[d]] > rstamps[k]) { | |
308 | doit = 1; | |
309 | break; | |
310 | } | |
311 | } | |
312 | if (!doit) | |
313 | continue; | |
314 | #ifdef RULES_DEBUG | |
09e56df8 | 315 | pr_debug("Rule %d [%p]: ", k, r->func); |
1da177e4 | 316 | if (r->var >= 0) { |
09e56df8 | 317 | pr_cont("%s = ", snd_pcm_hw_param_names[r->var]); |
1da177e4 LT |
318 | if (hw_is_mask(r->var)) { |
319 | m = hw_param_mask(params, r->var); | |
09e56df8 | 320 | pr_cont("%x", *m->bits); |
1da177e4 LT |
321 | } else { |
322 | i = hw_param_interval(params, r->var); | |
323 | if (i->empty) | |
09e56df8 | 324 | pr_cont("empty"); |
1da177e4 | 325 | else |
09e56df8 | 326 | pr_cont("%c%u %u%c", |
1da177e4 LT |
327 | i->openmin ? '(' : '[', i->min, |
328 | i->max, i->openmax ? ')' : ']'); | |
329 | } | |
330 | } | |
331 | #endif | |
332 | changed = r->func(params, r); | |
333 | #ifdef RULES_DEBUG | |
334 | if (r->var >= 0) { | |
09e56df8 | 335 | pr_cont(" -> "); |
1da177e4 | 336 | if (hw_is_mask(r->var)) |
09e56df8 | 337 | pr_cont("%x", *m->bits); |
1da177e4 LT |
338 | else { |
339 | if (i->empty) | |
09e56df8 | 340 | pr_cont("empty"); |
1da177e4 | 341 | else |
09e56df8 | 342 | pr_cont("%c%u %u%c", |
1da177e4 LT |
343 | i->openmin ? '(' : '[', i->min, |
344 | i->max, i->openmax ? ')' : ']'); | |
345 | } | |
346 | } | |
09e56df8 | 347 | pr_cont("\n"); |
1da177e4 LT |
348 | #endif |
349 | rstamps[k] = stamp; | |
350 | if (changed && r->var >= 0) { | |
351 | params->cmask |= (1 << r->var); | |
352 | vstamps[r->var] = stamp; | |
353 | again = 1; | |
354 | } | |
355 | if (changed < 0) | |
356 | return changed; | |
357 | stamp++; | |
358 | } | |
359 | } while (again); | |
360 | if (!params->msbits) { | |
361 | i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS); | |
362 | if (snd_interval_single(i)) | |
363 | params->msbits = snd_interval_value(i); | |
364 | } | |
365 | ||
366 | if (!params->rate_den) { | |
367 | i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE); | |
368 | if (snd_interval_single(i)) { | |
369 | params->rate_num = snd_interval_value(i); | |
370 | params->rate_den = 1; | |
371 | } | |
372 | } | |
373 | ||
374 | hw = &substream->runtime->hw; | |
375 | if (!params->info) | |
8bea869c JK |
376 | params->info = hw->info & ~SNDRV_PCM_INFO_FIFO_IN_FRAMES; |
377 | if (!params->fifo_size) { | |
3be522a9 JK |
378 | m = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); |
379 | i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS); | |
380 | if (snd_mask_min(m) == snd_mask_max(m) && | |
381 | snd_interval_min(i) == snd_interval_max(i)) { | |
8bea869c JK |
382 | changed = substream->ops->ioctl(substream, |
383 | SNDRV_PCM_IOCTL1_FIFO_SIZE, params); | |
8bd9bca3 | 384 | if (changed < 0) |
8bea869c JK |
385 | return changed; |
386 | } | |
387 | } | |
1da177e4 LT |
388 | params->rmask = 0; |
389 | return 0; | |
390 | } | |
391 | ||
e88e8ae6 TI |
392 | EXPORT_SYMBOL(snd_pcm_hw_refine); |
393 | ||
877211f5 TI |
394 | static int snd_pcm_hw_refine_user(struct snd_pcm_substream *substream, |
395 | struct snd_pcm_hw_params __user * _params) | |
1da177e4 | 396 | { |
877211f5 | 397 | struct snd_pcm_hw_params *params; |
1da177e4 LT |
398 | int err; |
399 | ||
ef44a1ec LZ |
400 | params = memdup_user(_params, sizeof(*params)); |
401 | if (IS_ERR(params)) | |
402 | return PTR_ERR(params); | |
403 | ||
1da177e4 LT |
404 | err = snd_pcm_hw_refine(substream, params); |
405 | if (copy_to_user(_params, params, sizeof(*params))) { | |
406 | if (!err) | |
407 | err = -EFAULT; | |
408 | } | |
ef44a1ec | 409 | |
1da177e4 LT |
410 | kfree(params); |
411 | return err; | |
412 | } | |
413 | ||
9442e691 TI |
414 | static int period_to_usecs(struct snd_pcm_runtime *runtime) |
415 | { | |
416 | int usecs; | |
417 | ||
418 | if (! runtime->rate) | |
419 | return -1; /* invalid */ | |
420 | ||
421 | /* take 75% of period time as the deadline */ | |
422 | usecs = (750000 / runtime->rate) * runtime->period_size; | |
423 | usecs += ((750000 % runtime->rate) * runtime->period_size) / | |
424 | runtime->rate; | |
425 | ||
426 | return usecs; | |
427 | } | |
428 | ||
9b0573c0 TI |
429 | static void snd_pcm_set_state(struct snd_pcm_substream *substream, int state) |
430 | { | |
431 | snd_pcm_stream_lock_irq(substream); | |
432 | if (substream->runtime->status->state != SNDRV_PCM_STATE_DISCONNECTED) | |
433 | substream->runtime->status->state = state; | |
434 | snd_pcm_stream_unlock_irq(substream); | |
435 | } | |
436 | ||
877211f5 TI |
437 | static int snd_pcm_hw_params(struct snd_pcm_substream *substream, |
438 | struct snd_pcm_hw_params *params) | |
1da177e4 | 439 | { |
877211f5 | 440 | struct snd_pcm_runtime *runtime; |
9442e691 | 441 | int err, usecs; |
1da177e4 LT |
442 | unsigned int bits; |
443 | snd_pcm_uframes_t frames; | |
444 | ||
7eaa943c TI |
445 | if (PCM_RUNTIME_CHECK(substream)) |
446 | return -ENXIO; | |
1da177e4 | 447 | runtime = substream->runtime; |
1da177e4 LT |
448 | snd_pcm_stream_lock_irq(substream); |
449 | switch (runtime->status->state) { | |
450 | case SNDRV_PCM_STATE_OPEN: | |
451 | case SNDRV_PCM_STATE_SETUP: | |
452 | case SNDRV_PCM_STATE_PREPARED: | |
453 | break; | |
454 | default: | |
455 | snd_pcm_stream_unlock_irq(substream); | |
456 | return -EBADFD; | |
457 | } | |
458 | snd_pcm_stream_unlock_irq(substream); | |
8eeaa2f9 | 459 | #if IS_ENABLED(CONFIG_SND_PCM_OSS) |
1da177e4 LT |
460 | if (!substream->oss.oss) |
461 | #endif | |
9c323fcb | 462 | if (atomic_read(&substream->mmap_count)) |
1da177e4 LT |
463 | return -EBADFD; |
464 | ||
465 | params->rmask = ~0U; | |
466 | err = snd_pcm_hw_refine(substream, params); | |
467 | if (err < 0) | |
468 | goto _error; | |
469 | ||
470 | err = snd_pcm_hw_params_choose(substream, params); | |
471 | if (err < 0) | |
472 | goto _error; | |
473 | ||
474 | if (substream->ops->hw_params != NULL) { | |
475 | err = substream->ops->hw_params(substream, params); | |
476 | if (err < 0) | |
477 | goto _error; | |
478 | } | |
479 | ||
480 | runtime->access = params_access(params); | |
481 | runtime->format = params_format(params); | |
482 | runtime->subformat = params_subformat(params); | |
483 | runtime->channels = params_channels(params); | |
484 | runtime->rate = params_rate(params); | |
485 | runtime->period_size = params_period_size(params); | |
486 | runtime->periods = params_periods(params); | |
487 | runtime->buffer_size = params_buffer_size(params); | |
1da177e4 LT |
488 | runtime->info = params->info; |
489 | runtime->rate_num = params->rate_num; | |
490 | runtime->rate_den = params->rate_den; | |
ab69a490 CL |
491 | runtime->no_period_wakeup = |
492 | (params->info & SNDRV_PCM_INFO_NO_PERIOD_WAKEUP) && | |
493 | (params->flags & SNDRV_PCM_HW_PARAMS_NO_PERIOD_WAKEUP); | |
1da177e4 LT |
494 | |
495 | bits = snd_pcm_format_physical_width(runtime->format); | |
496 | runtime->sample_bits = bits; | |
497 | bits *= runtime->channels; | |
498 | runtime->frame_bits = bits; | |
499 | frames = 1; | |
500 | while (bits % 8 != 0) { | |
501 | bits *= 2; | |
502 | frames *= 2; | |
503 | } | |
504 | runtime->byte_align = bits / 8; | |
505 | runtime->min_align = frames; | |
506 | ||
507 | /* Default sw params */ | |
508 | runtime->tstamp_mode = SNDRV_PCM_TSTAMP_NONE; | |
509 | runtime->period_step = 1; | |
1da177e4 | 510 | runtime->control->avail_min = runtime->period_size; |
1da177e4 LT |
511 | runtime->start_threshold = 1; |
512 | runtime->stop_threshold = runtime->buffer_size; | |
513 | runtime->silence_threshold = 0; | |
514 | runtime->silence_size = 0; | |
ead4046b CL |
515 | runtime->boundary = runtime->buffer_size; |
516 | while (runtime->boundary * 2 <= LONG_MAX - runtime->buffer_size) | |
517 | runtime->boundary *= 2; | |
1da177e4 LT |
518 | |
519 | snd_pcm_timer_resolution_change(substream); | |
9b0573c0 | 520 | snd_pcm_set_state(substream, SNDRV_PCM_STATE_SETUP); |
9442e691 | 521 | |
82f68251 JB |
522 | if (pm_qos_request_active(&substream->latency_pm_qos_req)) |
523 | pm_qos_remove_request(&substream->latency_pm_qos_req); | |
9442e691 | 524 | if ((usecs = period_to_usecs(runtime)) >= 0) |
82f68251 JB |
525 | pm_qos_add_request(&substream->latency_pm_qos_req, |
526 | PM_QOS_CPU_DMA_LATENCY, usecs); | |
1da177e4 LT |
527 | return 0; |
528 | _error: | |
25985edc | 529 | /* hardware might be unusable from this time, |
1da177e4 LT |
530 | so we force application to retry to set |
531 | the correct hardware parameter settings */ | |
9b0573c0 | 532 | snd_pcm_set_state(substream, SNDRV_PCM_STATE_OPEN); |
1da177e4 LT |
533 | if (substream->ops->hw_free != NULL) |
534 | substream->ops->hw_free(substream); | |
535 | return err; | |
536 | } | |
537 | ||
877211f5 TI |
538 | static int snd_pcm_hw_params_user(struct snd_pcm_substream *substream, |
539 | struct snd_pcm_hw_params __user * _params) | |
1da177e4 | 540 | { |
877211f5 | 541 | struct snd_pcm_hw_params *params; |
1da177e4 LT |
542 | int err; |
543 | ||
ef44a1ec LZ |
544 | params = memdup_user(_params, sizeof(*params)); |
545 | if (IS_ERR(params)) | |
546 | return PTR_ERR(params); | |
547 | ||
1da177e4 LT |
548 | err = snd_pcm_hw_params(substream, params); |
549 | if (copy_to_user(_params, params, sizeof(*params))) { | |
550 | if (!err) | |
551 | err = -EFAULT; | |
552 | } | |
ef44a1ec | 553 | |
1da177e4 LT |
554 | kfree(params); |
555 | return err; | |
556 | } | |
557 | ||
877211f5 | 558 | static int snd_pcm_hw_free(struct snd_pcm_substream *substream) |
1da177e4 | 559 | { |
877211f5 | 560 | struct snd_pcm_runtime *runtime; |
1da177e4 LT |
561 | int result = 0; |
562 | ||
7eaa943c TI |
563 | if (PCM_RUNTIME_CHECK(substream)) |
564 | return -ENXIO; | |
1da177e4 | 565 | runtime = substream->runtime; |
1da177e4 LT |
566 | snd_pcm_stream_lock_irq(substream); |
567 | switch (runtime->status->state) { | |
568 | case SNDRV_PCM_STATE_SETUP: | |
569 | case SNDRV_PCM_STATE_PREPARED: | |
570 | break; | |
571 | default: | |
572 | snd_pcm_stream_unlock_irq(substream); | |
573 | return -EBADFD; | |
574 | } | |
575 | snd_pcm_stream_unlock_irq(substream); | |
9c323fcb | 576 | if (atomic_read(&substream->mmap_count)) |
1da177e4 LT |
577 | return -EBADFD; |
578 | if (substream->ops->hw_free) | |
579 | result = substream->ops->hw_free(substream); | |
9b0573c0 | 580 | snd_pcm_set_state(substream, SNDRV_PCM_STATE_OPEN); |
82f68251 | 581 | pm_qos_remove_request(&substream->latency_pm_qos_req); |
1da177e4 LT |
582 | return result; |
583 | } | |
584 | ||
877211f5 TI |
585 | static int snd_pcm_sw_params(struct snd_pcm_substream *substream, |
586 | struct snd_pcm_sw_params *params) | |
1da177e4 | 587 | { |
877211f5 | 588 | struct snd_pcm_runtime *runtime; |
1250932e | 589 | int err; |
1da177e4 | 590 | |
7eaa943c TI |
591 | if (PCM_RUNTIME_CHECK(substream)) |
592 | return -ENXIO; | |
1da177e4 | 593 | runtime = substream->runtime; |
1da177e4 LT |
594 | snd_pcm_stream_lock_irq(substream); |
595 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { | |
596 | snd_pcm_stream_unlock_irq(substream); | |
597 | return -EBADFD; | |
598 | } | |
599 | snd_pcm_stream_unlock_irq(substream); | |
600 | ||
601 | if (params->tstamp_mode > SNDRV_PCM_TSTAMP_LAST) | |
602 | return -EINVAL; | |
58900810 TI |
603 | if (params->proto >= SNDRV_PROTOCOL_VERSION(2, 0, 12) && |
604 | params->tstamp_type > SNDRV_PCM_TSTAMP_TYPE_LAST) | |
5646eda5 | 605 | return -EINVAL; |
1da177e4 LT |
606 | if (params->avail_min == 0) |
607 | return -EINVAL; | |
1da177e4 LT |
608 | if (params->silence_size >= runtime->boundary) { |
609 | if (params->silence_threshold != 0) | |
610 | return -EINVAL; | |
611 | } else { | |
612 | if (params->silence_size > params->silence_threshold) | |
613 | return -EINVAL; | |
614 | if (params->silence_threshold > runtime->buffer_size) | |
615 | return -EINVAL; | |
616 | } | |
1250932e | 617 | err = 0; |
1da177e4 LT |
618 | snd_pcm_stream_lock_irq(substream); |
619 | runtime->tstamp_mode = params->tstamp_mode; | |
58900810 TI |
620 | if (params->proto >= SNDRV_PROTOCOL_VERSION(2, 0, 12)) |
621 | runtime->tstamp_type = params->tstamp_type; | |
1da177e4 LT |
622 | runtime->period_step = params->period_step; |
623 | runtime->control->avail_min = params->avail_min; | |
624 | runtime->start_threshold = params->start_threshold; | |
625 | runtime->stop_threshold = params->stop_threshold; | |
626 | runtime->silence_threshold = params->silence_threshold; | |
627 | runtime->silence_size = params->silence_size; | |
1da177e4 LT |
628 | params->boundary = runtime->boundary; |
629 | if (snd_pcm_running(substream)) { | |
1da177e4 LT |
630 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && |
631 | runtime->silence_size > 0) | |
632 | snd_pcm_playback_silence(substream, ULONG_MAX); | |
1250932e | 633 | err = snd_pcm_update_state(substream, runtime); |
1da177e4 LT |
634 | } |
635 | snd_pcm_stream_unlock_irq(substream); | |
1250932e | 636 | return err; |
1da177e4 LT |
637 | } |
638 | ||
877211f5 TI |
639 | static int snd_pcm_sw_params_user(struct snd_pcm_substream *substream, |
640 | struct snd_pcm_sw_params __user * _params) | |
1da177e4 | 641 | { |
877211f5 | 642 | struct snd_pcm_sw_params params; |
1da177e4 LT |
643 | int err; |
644 | if (copy_from_user(¶ms, _params, sizeof(params))) | |
645 | return -EFAULT; | |
646 | err = snd_pcm_sw_params(substream, ¶ms); | |
647 | if (copy_to_user(_params, ¶ms, sizeof(params))) | |
648 | return -EFAULT; | |
649 | return err; | |
650 | } | |
651 | ||
877211f5 TI |
652 | int snd_pcm_status(struct snd_pcm_substream *substream, |
653 | struct snd_pcm_status *status) | |
1da177e4 | 654 | { |
877211f5 | 655 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
656 | |
657 | snd_pcm_stream_lock_irq(substream); | |
658 | status->state = runtime->status->state; | |
659 | status->suspended_state = runtime->status->suspended_state; | |
660 | if (status->state == SNDRV_PCM_STATE_OPEN) | |
661 | goto _end; | |
662 | status->trigger_tstamp = runtime->trigger_tstamp; | |
8c121586 | 663 | if (snd_pcm_running(substream)) { |
1da177e4 | 664 | snd_pcm_update_hw_ptr(substream); |
8c121586 JK |
665 | if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) { |
666 | status->tstamp = runtime->status->tstamp; | |
4eeaaeae PLB |
667 | status->audio_tstamp = |
668 | runtime->status->audio_tstamp; | |
8c121586 JK |
669 | goto _tstamp_end; |
670 | } | |
671 | } | |
a713b583 | 672 | snd_pcm_gettime(runtime, &status->tstamp); |
8c121586 | 673 | _tstamp_end: |
1da177e4 LT |
674 | status->appl_ptr = runtime->control->appl_ptr; |
675 | status->hw_ptr = runtime->status->hw_ptr; | |
676 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { | |
677 | status->avail = snd_pcm_playback_avail(runtime); | |
678 | if (runtime->status->state == SNDRV_PCM_STATE_RUNNING || | |
4bbe1ddf | 679 | runtime->status->state == SNDRV_PCM_STATE_DRAINING) { |
1da177e4 | 680 | status->delay = runtime->buffer_size - status->avail; |
4bbe1ddf TI |
681 | status->delay += runtime->delay; |
682 | } else | |
1da177e4 LT |
683 | status->delay = 0; |
684 | } else { | |
685 | status->avail = snd_pcm_capture_avail(runtime); | |
686 | if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) | |
4bbe1ddf | 687 | status->delay = status->avail + runtime->delay; |
1da177e4 LT |
688 | else |
689 | status->delay = 0; | |
690 | } | |
691 | status->avail_max = runtime->avail_max; | |
692 | status->overrange = runtime->overrange; | |
693 | runtime->avail_max = 0; | |
694 | runtime->overrange = 0; | |
695 | _end: | |
696 | snd_pcm_stream_unlock_irq(substream); | |
697 | return 0; | |
698 | } | |
699 | ||
877211f5 TI |
700 | static int snd_pcm_status_user(struct snd_pcm_substream *substream, |
701 | struct snd_pcm_status __user * _status) | |
1da177e4 | 702 | { |
877211f5 | 703 | struct snd_pcm_status status; |
1da177e4 LT |
704 | int res; |
705 | ||
1da177e4 LT |
706 | memset(&status, 0, sizeof(status)); |
707 | res = snd_pcm_status(substream, &status); | |
708 | if (res < 0) | |
709 | return res; | |
710 | if (copy_to_user(_status, &status, sizeof(status))) | |
711 | return -EFAULT; | |
712 | return 0; | |
713 | } | |
714 | ||
877211f5 TI |
715 | static int snd_pcm_channel_info(struct snd_pcm_substream *substream, |
716 | struct snd_pcm_channel_info * info) | |
1da177e4 | 717 | { |
877211f5 | 718 | struct snd_pcm_runtime *runtime; |
1da177e4 LT |
719 | unsigned int channel; |
720 | ||
1da177e4 LT |
721 | channel = info->channel; |
722 | runtime = substream->runtime; | |
723 | snd_pcm_stream_lock_irq(substream); | |
724 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { | |
725 | snd_pcm_stream_unlock_irq(substream); | |
726 | return -EBADFD; | |
727 | } | |
728 | snd_pcm_stream_unlock_irq(substream); | |
729 | if (channel >= runtime->channels) | |
730 | return -EINVAL; | |
731 | memset(info, 0, sizeof(*info)); | |
732 | info->channel = channel; | |
733 | return substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_CHANNEL_INFO, info); | |
734 | } | |
735 | ||
877211f5 TI |
736 | static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream, |
737 | struct snd_pcm_channel_info __user * _info) | |
1da177e4 | 738 | { |
877211f5 | 739 | struct snd_pcm_channel_info info; |
1da177e4 LT |
740 | int res; |
741 | ||
742 | if (copy_from_user(&info, _info, sizeof(info))) | |
743 | return -EFAULT; | |
744 | res = snd_pcm_channel_info(substream, &info); | |
745 | if (res < 0) | |
746 | return res; | |
747 | if (copy_to_user(_info, &info, sizeof(info))) | |
748 | return -EFAULT; | |
749 | return 0; | |
750 | } | |
751 | ||
877211f5 | 752 | static void snd_pcm_trigger_tstamp(struct snd_pcm_substream *substream) |
1da177e4 | 753 | { |
877211f5 | 754 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
755 | if (runtime->trigger_master == NULL) |
756 | return; | |
757 | if (runtime->trigger_master == substream) { | |
b751eef1 | 758 | snd_pcm_gettime(runtime, &runtime->trigger_tstamp); |
1da177e4 LT |
759 | } else { |
760 | snd_pcm_trigger_tstamp(runtime->trigger_master); | |
761 | runtime->trigger_tstamp = runtime->trigger_master->runtime->trigger_tstamp; | |
762 | } | |
763 | runtime->trigger_master = NULL; | |
764 | } | |
765 | ||
766 | struct action_ops { | |
877211f5 TI |
767 | int (*pre_action)(struct snd_pcm_substream *substream, int state); |
768 | int (*do_action)(struct snd_pcm_substream *substream, int state); | |
769 | void (*undo_action)(struct snd_pcm_substream *substream, int state); | |
770 | void (*post_action)(struct snd_pcm_substream *substream, int state); | |
1da177e4 LT |
771 | }; |
772 | ||
773 | /* | |
774 | * this functions is core for handling of linked stream | |
775 | * Note: the stream state might be changed also on failure | |
776 | * Note2: call with calling stream lock + link lock | |
777 | */ | |
778 | static int snd_pcm_action_group(struct action_ops *ops, | |
877211f5 | 779 | struct snd_pcm_substream *substream, |
1da177e4 LT |
780 | int state, int do_lock) |
781 | { | |
877211f5 TI |
782 | struct snd_pcm_substream *s = NULL; |
783 | struct snd_pcm_substream *s1; | |
1da177e4 LT |
784 | int res = 0; |
785 | ||
ef991b95 | 786 | snd_pcm_group_for_each_entry(s, substream) { |
257f8cce TI |
787 | if (do_lock && s != substream) { |
788 | if (s->pcm->nonatomic) | |
789 | mutex_lock_nested(&s->self_group.mutex, | |
790 | SINGLE_DEPTH_NESTING); | |
791 | else | |
792 | spin_lock_nested(&s->self_group.lock, | |
793 | SINGLE_DEPTH_NESTING); | |
794 | } | |
1da177e4 LT |
795 | res = ops->pre_action(s, state); |
796 | if (res < 0) | |
797 | goto _unlock; | |
798 | } | |
ef991b95 | 799 | snd_pcm_group_for_each_entry(s, substream) { |
1da177e4 LT |
800 | res = ops->do_action(s, state); |
801 | if (res < 0) { | |
802 | if (ops->undo_action) { | |
ef991b95 | 803 | snd_pcm_group_for_each_entry(s1, substream) { |
1da177e4 LT |
804 | if (s1 == s) /* failed stream */ |
805 | break; | |
806 | ops->undo_action(s1, state); | |
807 | } | |
808 | } | |
809 | s = NULL; /* unlock all */ | |
810 | goto _unlock; | |
811 | } | |
812 | } | |
ef991b95 | 813 | snd_pcm_group_for_each_entry(s, substream) { |
1da177e4 LT |
814 | ops->post_action(s, state); |
815 | } | |
816 | _unlock: | |
817 | if (do_lock) { | |
818 | /* unlock streams */ | |
ef991b95 | 819 | snd_pcm_group_for_each_entry(s1, substream) { |
257f8cce TI |
820 | if (s1 != substream) { |
821 | if (s->pcm->nonatomic) | |
822 | mutex_unlock(&s1->self_group.mutex); | |
823 | else | |
824 | spin_unlock(&s1->self_group.lock); | |
825 | } | |
1da177e4 LT |
826 | if (s1 == s) /* end */ |
827 | break; | |
828 | } | |
829 | } | |
830 | return res; | |
831 | } | |
832 | ||
833 | /* | |
834 | * Note: call with stream lock | |
835 | */ | |
836 | static int snd_pcm_action_single(struct action_ops *ops, | |
877211f5 | 837 | struct snd_pcm_substream *substream, |
1da177e4 LT |
838 | int state) |
839 | { | |
840 | int res; | |
841 | ||
842 | res = ops->pre_action(substream, state); | |
843 | if (res < 0) | |
844 | return res; | |
845 | res = ops->do_action(substream, state); | |
846 | if (res == 0) | |
847 | ops->post_action(substream, state); | |
848 | else if (ops->undo_action) | |
849 | ops->undo_action(substream, state); | |
850 | return res; | |
851 | } | |
852 | ||
257f8cce TI |
853 | /* call in mutex-protected context */ |
854 | static int snd_pcm_action_mutex(struct action_ops *ops, | |
855 | struct snd_pcm_substream *substream, | |
856 | int state) | |
857 | { | |
858 | int res; | |
859 | ||
860 | if (snd_pcm_stream_linked(substream)) { | |
861 | if (!mutex_trylock(&substream->group->mutex)) { | |
862 | mutex_unlock(&substream->self_group.mutex); | |
863 | mutex_lock(&substream->group->mutex); | |
864 | mutex_lock(&substream->self_group.mutex); | |
865 | } | |
866 | res = snd_pcm_action_group(ops, substream, state, 1); | |
867 | mutex_unlock(&substream->group->mutex); | |
868 | } else { | |
869 | res = snd_pcm_action_single(ops, substream, state); | |
870 | } | |
871 | return res; | |
872 | } | |
873 | ||
1da177e4 LT |
874 | /* |
875 | * Note: call with stream lock | |
876 | */ | |
877 | static int snd_pcm_action(struct action_ops *ops, | |
877211f5 | 878 | struct snd_pcm_substream *substream, |
1da177e4 LT |
879 | int state) |
880 | { | |
881 | int res; | |
882 | ||
257f8cce TI |
883 | if (substream->pcm->nonatomic) |
884 | return snd_pcm_action_mutex(ops, substream, state); | |
885 | ||
1da177e4 LT |
886 | if (snd_pcm_stream_linked(substream)) { |
887 | if (!spin_trylock(&substream->group->lock)) { | |
888 | spin_unlock(&substream->self_group.lock); | |
889 | spin_lock(&substream->group->lock); | |
890 | spin_lock(&substream->self_group.lock); | |
891 | } | |
892 | res = snd_pcm_action_group(ops, substream, state, 1); | |
893 | spin_unlock(&substream->group->lock); | |
894 | } else { | |
895 | res = snd_pcm_action_single(ops, substream, state); | |
896 | } | |
897 | return res; | |
898 | } | |
899 | ||
257f8cce TI |
900 | static int snd_pcm_action_lock_mutex(struct action_ops *ops, |
901 | struct snd_pcm_substream *substream, | |
902 | int state) | |
903 | { | |
904 | int res; | |
905 | ||
906 | down_read(&snd_pcm_link_rwsem); | |
907 | if (snd_pcm_stream_linked(substream)) { | |
908 | mutex_lock(&substream->group->mutex); | |
909 | mutex_lock_nested(&substream->self_group.mutex, | |
910 | SINGLE_DEPTH_NESTING); | |
911 | res = snd_pcm_action_group(ops, substream, state, 1); | |
912 | mutex_unlock(&substream->self_group.mutex); | |
913 | mutex_unlock(&substream->group->mutex); | |
914 | } else { | |
915 | mutex_lock(&substream->self_group.mutex); | |
916 | res = snd_pcm_action_single(ops, substream, state); | |
917 | mutex_unlock(&substream->self_group.mutex); | |
918 | } | |
919 | up_read(&snd_pcm_link_rwsem); | |
920 | return res; | |
921 | } | |
922 | ||
1da177e4 LT |
923 | /* |
924 | * Note: don't use any locks before | |
925 | */ | |
926 | static int snd_pcm_action_lock_irq(struct action_ops *ops, | |
877211f5 | 927 | struct snd_pcm_substream *substream, |
1da177e4 LT |
928 | int state) |
929 | { | |
930 | int res; | |
931 | ||
257f8cce TI |
932 | if (substream->pcm->nonatomic) |
933 | return snd_pcm_action_lock_mutex(ops, substream, state); | |
934 | ||
1da177e4 LT |
935 | read_lock_irq(&snd_pcm_link_rwlock); |
936 | if (snd_pcm_stream_linked(substream)) { | |
937 | spin_lock(&substream->group->lock); | |
938 | spin_lock(&substream->self_group.lock); | |
939 | res = snd_pcm_action_group(ops, substream, state, 1); | |
940 | spin_unlock(&substream->self_group.lock); | |
941 | spin_unlock(&substream->group->lock); | |
942 | } else { | |
943 | spin_lock(&substream->self_group.lock); | |
944 | res = snd_pcm_action_single(ops, substream, state); | |
945 | spin_unlock(&substream->self_group.lock); | |
946 | } | |
947 | read_unlock_irq(&snd_pcm_link_rwlock); | |
948 | return res; | |
949 | } | |
950 | ||
951 | /* | |
952 | */ | |
953 | static int snd_pcm_action_nonatomic(struct action_ops *ops, | |
877211f5 | 954 | struct snd_pcm_substream *substream, |
1da177e4 LT |
955 | int state) |
956 | { | |
957 | int res; | |
958 | ||
959 | down_read(&snd_pcm_link_rwsem); | |
960 | if (snd_pcm_stream_linked(substream)) | |
961 | res = snd_pcm_action_group(ops, substream, state, 0); | |
962 | else | |
963 | res = snd_pcm_action_single(ops, substream, state); | |
964 | up_read(&snd_pcm_link_rwsem); | |
965 | return res; | |
966 | } | |
967 | ||
968 | /* | |
969 | * start callbacks | |
970 | */ | |
877211f5 | 971 | static int snd_pcm_pre_start(struct snd_pcm_substream *substream, int state) |
1da177e4 | 972 | { |
877211f5 | 973 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
974 | if (runtime->status->state != SNDRV_PCM_STATE_PREPARED) |
975 | return -EBADFD; | |
976 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && | |
977 | !snd_pcm_playback_data(substream)) | |
978 | return -EPIPE; | |
979 | runtime->trigger_master = substream; | |
980 | return 0; | |
981 | } | |
982 | ||
877211f5 | 983 | static int snd_pcm_do_start(struct snd_pcm_substream *substream, int state) |
1da177e4 LT |
984 | { |
985 | if (substream->runtime->trigger_master != substream) | |
986 | return 0; | |
987 | return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_START); | |
988 | } | |
989 | ||
877211f5 | 990 | static void snd_pcm_undo_start(struct snd_pcm_substream *substream, int state) |
1da177e4 LT |
991 | { |
992 | if (substream->runtime->trigger_master == substream) | |
993 | substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP); | |
994 | } | |
995 | ||
877211f5 | 996 | static void snd_pcm_post_start(struct snd_pcm_substream *substream, int state) |
1da177e4 | 997 | { |
877211f5 | 998 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 | 999 | snd_pcm_trigger_tstamp(substream); |
6af3fb72 | 1000 | runtime->hw_ptr_jiffies = jiffies; |
bd76af0f JK |
1001 | runtime->hw_ptr_buffer_jiffies = (runtime->buffer_size * HZ) / |
1002 | runtime->rate; | |
1da177e4 LT |
1003 | runtime->status->state = state; |
1004 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && | |
1005 | runtime->silence_size > 0) | |
1006 | snd_pcm_playback_silence(substream, ULONG_MAX); | |
1da177e4 | 1007 | if (substream->timer) |
877211f5 TI |
1008 | snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTART, |
1009 | &runtime->trigger_tstamp); | |
1da177e4 LT |
1010 | } |
1011 | ||
1012 | static struct action_ops snd_pcm_action_start = { | |
1013 | .pre_action = snd_pcm_pre_start, | |
1014 | .do_action = snd_pcm_do_start, | |
1015 | .undo_action = snd_pcm_undo_start, | |
1016 | .post_action = snd_pcm_post_start | |
1017 | }; | |
1018 | ||
1019 | /** | |
1c85cc64 | 1020 | * snd_pcm_start - start all linked streams |
df8db936 | 1021 | * @substream: the PCM substream instance |
eb7c06e8 YB |
1022 | * |
1023 | * Return: Zero if successful, or a negative error code. | |
1da177e4 | 1024 | */ |
877211f5 | 1025 | int snd_pcm_start(struct snd_pcm_substream *substream) |
1da177e4 | 1026 | { |
877211f5 TI |
1027 | return snd_pcm_action(&snd_pcm_action_start, substream, |
1028 | SNDRV_PCM_STATE_RUNNING); | |
1da177e4 LT |
1029 | } |
1030 | ||
1031 | /* | |
1032 | * stop callbacks | |
1033 | */ | |
877211f5 | 1034 | static int snd_pcm_pre_stop(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1035 | { |
877211f5 | 1036 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1037 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) |
1038 | return -EBADFD; | |
1039 | runtime->trigger_master = substream; | |
1040 | return 0; | |
1041 | } | |
1042 | ||
877211f5 | 1043 | static int snd_pcm_do_stop(struct snd_pcm_substream *substream, int state) |
1da177e4 LT |
1044 | { |
1045 | if (substream->runtime->trigger_master == substream && | |
1046 | snd_pcm_running(substream)) | |
1047 | substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP); | |
1048 | return 0; /* unconditonally stop all substreams */ | |
1049 | } | |
1050 | ||
877211f5 | 1051 | static void snd_pcm_post_stop(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1052 | { |
877211f5 | 1053 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1054 | if (runtime->status->state != state) { |
1055 | snd_pcm_trigger_tstamp(substream); | |
1056 | if (substream->timer) | |
877211f5 TI |
1057 | snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTOP, |
1058 | &runtime->trigger_tstamp); | |
1da177e4 | 1059 | runtime->status->state = state; |
1da177e4 LT |
1060 | } |
1061 | wake_up(&runtime->sleep); | |
c91a988d | 1062 | wake_up(&runtime->tsleep); |
1da177e4 LT |
1063 | } |
1064 | ||
1065 | static struct action_ops snd_pcm_action_stop = { | |
1066 | .pre_action = snd_pcm_pre_stop, | |
1067 | .do_action = snd_pcm_do_stop, | |
1068 | .post_action = snd_pcm_post_stop | |
1069 | }; | |
1070 | ||
1071 | /** | |
1c85cc64 | 1072 | * snd_pcm_stop - try to stop all running streams in the substream group |
df8db936 TI |
1073 | * @substream: the PCM substream instance |
1074 | * @state: PCM state after stopping the stream | |
1da177e4 | 1075 | * |
1c85cc64 | 1076 | * The state of each stream is then changed to the given state unconditionally. |
eb7c06e8 | 1077 | * |
0a11458c | 1078 | * Return: Zero if successful, or a negative error code. |
1da177e4 | 1079 | */ |
fea952e5 | 1080 | int snd_pcm_stop(struct snd_pcm_substream *substream, snd_pcm_state_t state) |
1da177e4 LT |
1081 | { |
1082 | return snd_pcm_action(&snd_pcm_action_stop, substream, state); | |
1083 | } | |
1084 | ||
e88e8ae6 TI |
1085 | EXPORT_SYMBOL(snd_pcm_stop); |
1086 | ||
1da177e4 | 1087 | /** |
1c85cc64 | 1088 | * snd_pcm_drain_done - stop the DMA only when the given stream is playback |
df8db936 | 1089 | * @substream: the PCM substream |
1da177e4 | 1090 | * |
1c85cc64 | 1091 | * After stopping, the state is changed to SETUP. |
1da177e4 | 1092 | * Unlike snd_pcm_stop(), this affects only the given stream. |
eb7c06e8 YB |
1093 | * |
1094 | * Return: Zero if succesful, or a negative error code. | |
1da177e4 | 1095 | */ |
877211f5 | 1096 | int snd_pcm_drain_done(struct snd_pcm_substream *substream) |
1da177e4 | 1097 | { |
877211f5 TI |
1098 | return snd_pcm_action_single(&snd_pcm_action_stop, substream, |
1099 | SNDRV_PCM_STATE_SETUP); | |
1da177e4 LT |
1100 | } |
1101 | ||
1102 | /* | |
1103 | * pause callbacks | |
1104 | */ | |
877211f5 | 1105 | static int snd_pcm_pre_pause(struct snd_pcm_substream *substream, int push) |
1da177e4 | 1106 | { |
877211f5 | 1107 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1108 | if (!(runtime->info & SNDRV_PCM_INFO_PAUSE)) |
1109 | return -ENOSYS; | |
1110 | if (push) { | |
1111 | if (runtime->status->state != SNDRV_PCM_STATE_RUNNING) | |
1112 | return -EBADFD; | |
1113 | } else if (runtime->status->state != SNDRV_PCM_STATE_PAUSED) | |
1114 | return -EBADFD; | |
1115 | runtime->trigger_master = substream; | |
1116 | return 0; | |
1117 | } | |
1118 | ||
877211f5 | 1119 | static int snd_pcm_do_pause(struct snd_pcm_substream *substream, int push) |
1da177e4 LT |
1120 | { |
1121 | if (substream->runtime->trigger_master != substream) | |
1122 | return 0; | |
56385a12 JK |
1123 | /* some drivers might use hw_ptr to recover from the pause - |
1124 | update the hw_ptr now */ | |
1125 | if (push) | |
1126 | snd_pcm_update_hw_ptr(substream); | |
6af3fb72 | 1127 | /* The jiffies check in snd_pcm_update_hw_ptr*() is done by |
b595076a | 1128 | * a delta between the current jiffies, this gives a large enough |
6af3fb72 TI |
1129 | * delta, effectively to skip the check once. |
1130 | */ | |
1131 | substream->runtime->hw_ptr_jiffies = jiffies - HZ * 1000; | |
1da177e4 LT |
1132 | return substream->ops->trigger(substream, |
1133 | push ? SNDRV_PCM_TRIGGER_PAUSE_PUSH : | |
1134 | SNDRV_PCM_TRIGGER_PAUSE_RELEASE); | |
1135 | } | |
1136 | ||
877211f5 | 1137 | static void snd_pcm_undo_pause(struct snd_pcm_substream *substream, int push) |
1da177e4 LT |
1138 | { |
1139 | if (substream->runtime->trigger_master == substream) | |
1140 | substream->ops->trigger(substream, | |
1141 | push ? SNDRV_PCM_TRIGGER_PAUSE_RELEASE : | |
1142 | SNDRV_PCM_TRIGGER_PAUSE_PUSH); | |
1143 | } | |
1144 | ||
877211f5 | 1145 | static void snd_pcm_post_pause(struct snd_pcm_substream *substream, int push) |
1da177e4 | 1146 | { |
877211f5 | 1147 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1148 | snd_pcm_trigger_tstamp(substream); |
1149 | if (push) { | |
1150 | runtime->status->state = SNDRV_PCM_STATE_PAUSED; | |
1151 | if (substream->timer) | |
877211f5 TI |
1152 | snd_timer_notify(substream->timer, |
1153 | SNDRV_TIMER_EVENT_MPAUSE, | |
1154 | &runtime->trigger_tstamp); | |
1da177e4 | 1155 | wake_up(&runtime->sleep); |
c91a988d | 1156 | wake_up(&runtime->tsleep); |
1da177e4 LT |
1157 | } else { |
1158 | runtime->status->state = SNDRV_PCM_STATE_RUNNING; | |
1da177e4 | 1159 | if (substream->timer) |
877211f5 TI |
1160 | snd_timer_notify(substream->timer, |
1161 | SNDRV_TIMER_EVENT_MCONTINUE, | |
1162 | &runtime->trigger_tstamp); | |
1da177e4 LT |
1163 | } |
1164 | } | |
1165 | ||
1166 | static struct action_ops snd_pcm_action_pause = { | |
1167 | .pre_action = snd_pcm_pre_pause, | |
1168 | .do_action = snd_pcm_do_pause, | |
1169 | .undo_action = snd_pcm_undo_pause, | |
1170 | .post_action = snd_pcm_post_pause | |
1171 | }; | |
1172 | ||
1173 | /* | |
1174 | * Push/release the pause for all linked streams. | |
1175 | */ | |
877211f5 | 1176 | static int snd_pcm_pause(struct snd_pcm_substream *substream, int push) |
1da177e4 LT |
1177 | { |
1178 | return snd_pcm_action(&snd_pcm_action_pause, substream, push); | |
1179 | } | |
1180 | ||
1181 | #ifdef CONFIG_PM | |
1182 | /* suspend */ | |
1183 | ||
877211f5 | 1184 | static int snd_pcm_pre_suspend(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1185 | { |
877211f5 | 1186 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1187 | if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) |
1188 | return -EBUSY; | |
1189 | runtime->trigger_master = substream; | |
1190 | return 0; | |
1191 | } | |
1192 | ||
877211f5 | 1193 | static int snd_pcm_do_suspend(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1194 | { |
877211f5 | 1195 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1196 | if (runtime->trigger_master != substream) |
1197 | return 0; | |
1198 | if (! snd_pcm_running(substream)) | |
1199 | return 0; | |
1200 | substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND); | |
1201 | return 0; /* suspend unconditionally */ | |
1202 | } | |
1203 | ||
877211f5 | 1204 | static void snd_pcm_post_suspend(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1205 | { |
877211f5 | 1206 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1207 | snd_pcm_trigger_tstamp(substream); |
1208 | if (substream->timer) | |
877211f5 TI |
1209 | snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSUSPEND, |
1210 | &runtime->trigger_tstamp); | |
1da177e4 LT |
1211 | runtime->status->suspended_state = runtime->status->state; |
1212 | runtime->status->state = SNDRV_PCM_STATE_SUSPENDED; | |
1da177e4 | 1213 | wake_up(&runtime->sleep); |
c91a988d | 1214 | wake_up(&runtime->tsleep); |
1da177e4 LT |
1215 | } |
1216 | ||
1217 | static struct action_ops snd_pcm_action_suspend = { | |
1218 | .pre_action = snd_pcm_pre_suspend, | |
1219 | .do_action = snd_pcm_do_suspend, | |
1220 | .post_action = snd_pcm_post_suspend | |
1221 | }; | |
1222 | ||
1223 | /** | |
1c85cc64 | 1224 | * snd_pcm_suspend - trigger SUSPEND to all linked streams |
df8db936 | 1225 | * @substream: the PCM substream |
1da177e4 | 1226 | * |
1da177e4 | 1227 | * After this call, all streams are changed to SUSPENDED state. |
eb7c06e8 YB |
1228 | * |
1229 | * Return: Zero if successful (or @substream is %NULL), or a negative error | |
1230 | * code. | |
1da177e4 | 1231 | */ |
877211f5 | 1232 | int snd_pcm_suspend(struct snd_pcm_substream *substream) |
1da177e4 LT |
1233 | { |
1234 | int err; | |
1235 | unsigned long flags; | |
1236 | ||
603bf524 TI |
1237 | if (! substream) |
1238 | return 0; | |
1239 | ||
1da177e4 LT |
1240 | snd_pcm_stream_lock_irqsave(substream, flags); |
1241 | err = snd_pcm_action(&snd_pcm_action_suspend, substream, 0); | |
1242 | snd_pcm_stream_unlock_irqrestore(substream, flags); | |
1243 | return err; | |
1244 | } | |
1245 | ||
e88e8ae6 TI |
1246 | EXPORT_SYMBOL(snd_pcm_suspend); |
1247 | ||
1da177e4 | 1248 | /** |
1c85cc64 | 1249 | * snd_pcm_suspend_all - trigger SUSPEND to all substreams in the given pcm |
df8db936 | 1250 | * @pcm: the PCM instance |
1da177e4 | 1251 | * |
1da177e4 | 1252 | * After this call, all streams are changed to SUSPENDED state. |
eb7c06e8 YB |
1253 | * |
1254 | * Return: Zero if successful (or @pcm is %NULL), or a negative error code. | |
1da177e4 | 1255 | */ |
877211f5 | 1256 | int snd_pcm_suspend_all(struct snd_pcm *pcm) |
1da177e4 | 1257 | { |
877211f5 | 1258 | struct snd_pcm_substream *substream; |
1da177e4 LT |
1259 | int stream, err = 0; |
1260 | ||
603bf524 TI |
1261 | if (! pcm) |
1262 | return 0; | |
1263 | ||
1da177e4 | 1264 | for (stream = 0; stream < 2; stream++) { |
877211f5 TI |
1265 | for (substream = pcm->streams[stream].substream; |
1266 | substream; substream = substream->next) { | |
1da177e4 LT |
1267 | /* FIXME: the open/close code should lock this as well */ |
1268 | if (substream->runtime == NULL) | |
1269 | continue; | |
1270 | err = snd_pcm_suspend(substream); | |
1271 | if (err < 0 && err != -EBUSY) | |
1272 | return err; | |
1273 | } | |
1274 | } | |
1275 | return 0; | |
1276 | } | |
1277 | ||
e88e8ae6 TI |
1278 | EXPORT_SYMBOL(snd_pcm_suspend_all); |
1279 | ||
1da177e4 LT |
1280 | /* resume */ |
1281 | ||
877211f5 | 1282 | static int snd_pcm_pre_resume(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1283 | { |
877211f5 | 1284 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1285 | if (!(runtime->info & SNDRV_PCM_INFO_RESUME)) |
1286 | return -ENOSYS; | |
1287 | runtime->trigger_master = substream; | |
1288 | return 0; | |
1289 | } | |
1290 | ||
877211f5 | 1291 | static int snd_pcm_do_resume(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1292 | { |
877211f5 | 1293 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1294 | if (runtime->trigger_master != substream) |
1295 | return 0; | |
1296 | /* DMA not running previously? */ | |
1297 | if (runtime->status->suspended_state != SNDRV_PCM_STATE_RUNNING && | |
1298 | (runtime->status->suspended_state != SNDRV_PCM_STATE_DRAINING || | |
1299 | substream->stream != SNDRV_PCM_STREAM_PLAYBACK)) | |
1300 | return 0; | |
1301 | return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_RESUME); | |
1302 | } | |
1303 | ||
877211f5 | 1304 | static void snd_pcm_undo_resume(struct snd_pcm_substream *substream, int state) |
1da177e4 LT |
1305 | { |
1306 | if (substream->runtime->trigger_master == substream && | |
1307 | snd_pcm_running(substream)) | |
1308 | substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND); | |
1309 | } | |
1310 | ||
877211f5 | 1311 | static void snd_pcm_post_resume(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1312 | { |
877211f5 | 1313 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1314 | snd_pcm_trigger_tstamp(substream); |
1315 | if (substream->timer) | |
877211f5 TI |
1316 | snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MRESUME, |
1317 | &runtime->trigger_tstamp); | |
1da177e4 | 1318 | runtime->status->state = runtime->status->suspended_state; |
1da177e4 LT |
1319 | } |
1320 | ||
1321 | static struct action_ops snd_pcm_action_resume = { | |
1322 | .pre_action = snd_pcm_pre_resume, | |
1323 | .do_action = snd_pcm_do_resume, | |
1324 | .undo_action = snd_pcm_undo_resume, | |
1325 | .post_action = snd_pcm_post_resume | |
1326 | }; | |
1327 | ||
877211f5 | 1328 | static int snd_pcm_resume(struct snd_pcm_substream *substream) |
1da177e4 | 1329 | { |
877211f5 | 1330 | struct snd_card *card = substream->pcm->card; |
1da177e4 LT |
1331 | int res; |
1332 | ||
1333 | snd_power_lock(card); | |
cbac4b0c | 1334 | if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0) |
1da177e4 LT |
1335 | res = snd_pcm_action_lock_irq(&snd_pcm_action_resume, substream, 0); |
1336 | snd_power_unlock(card); | |
1337 | return res; | |
1338 | } | |
1339 | ||
1340 | #else | |
1341 | ||
877211f5 | 1342 | static int snd_pcm_resume(struct snd_pcm_substream *substream) |
1da177e4 LT |
1343 | { |
1344 | return -ENOSYS; | |
1345 | } | |
1346 | ||
1347 | #endif /* CONFIG_PM */ | |
1348 | ||
1349 | /* | |
1350 | * xrun ioctl | |
1351 | * | |
1352 | * Change the RUNNING stream(s) to XRUN state. | |
1353 | */ | |
877211f5 | 1354 | static int snd_pcm_xrun(struct snd_pcm_substream *substream) |
1da177e4 | 1355 | { |
877211f5 TI |
1356 | struct snd_card *card = substream->pcm->card; |
1357 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1da177e4 LT |
1358 | int result; |
1359 | ||
1360 | snd_power_lock(card); | |
1361 | if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { | |
cbac4b0c | 1362 | result = snd_power_wait(card, SNDRV_CTL_POWER_D0); |
1da177e4 LT |
1363 | if (result < 0) |
1364 | goto _unlock; | |
1365 | } | |
1366 | ||
1367 | snd_pcm_stream_lock_irq(substream); | |
1368 | switch (runtime->status->state) { | |
1369 | case SNDRV_PCM_STATE_XRUN: | |
1370 | result = 0; /* already there */ | |
1371 | break; | |
1372 | case SNDRV_PCM_STATE_RUNNING: | |
1373 | result = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN); | |
1374 | break; | |
1375 | default: | |
1376 | result = -EBADFD; | |
1377 | } | |
1378 | snd_pcm_stream_unlock_irq(substream); | |
1379 | _unlock: | |
1380 | snd_power_unlock(card); | |
1381 | return result; | |
1382 | } | |
1383 | ||
1384 | /* | |
1385 | * reset ioctl | |
1386 | */ | |
877211f5 | 1387 | static int snd_pcm_pre_reset(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1388 | { |
877211f5 | 1389 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1390 | switch (runtime->status->state) { |
1391 | case SNDRV_PCM_STATE_RUNNING: | |
1392 | case SNDRV_PCM_STATE_PREPARED: | |
1393 | case SNDRV_PCM_STATE_PAUSED: | |
1394 | case SNDRV_PCM_STATE_SUSPENDED: | |
1395 | return 0; | |
1396 | default: | |
1397 | return -EBADFD; | |
1398 | } | |
1399 | } | |
1400 | ||
877211f5 | 1401 | static int snd_pcm_do_reset(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1402 | { |
877211f5 | 1403 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1404 | int err = substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL); |
1405 | if (err < 0) | |
1406 | return err; | |
1da177e4 | 1407 | runtime->hw_ptr_base = 0; |
e7636925 JK |
1408 | runtime->hw_ptr_interrupt = runtime->status->hw_ptr - |
1409 | runtime->status->hw_ptr % runtime->period_size; | |
1da177e4 LT |
1410 | runtime->silence_start = runtime->status->hw_ptr; |
1411 | runtime->silence_filled = 0; | |
1412 | return 0; | |
1413 | } | |
1414 | ||
877211f5 | 1415 | static void snd_pcm_post_reset(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1416 | { |
877211f5 | 1417 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1418 | runtime->control->appl_ptr = runtime->status->hw_ptr; |
1419 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && | |
1420 | runtime->silence_size > 0) | |
1421 | snd_pcm_playback_silence(substream, ULONG_MAX); | |
1422 | } | |
1423 | ||
1424 | static struct action_ops snd_pcm_action_reset = { | |
1425 | .pre_action = snd_pcm_pre_reset, | |
1426 | .do_action = snd_pcm_do_reset, | |
1427 | .post_action = snd_pcm_post_reset | |
1428 | }; | |
1429 | ||
877211f5 | 1430 | static int snd_pcm_reset(struct snd_pcm_substream *substream) |
1da177e4 LT |
1431 | { |
1432 | return snd_pcm_action_nonatomic(&snd_pcm_action_reset, substream, 0); | |
1433 | } | |
1434 | ||
1435 | /* | |
1436 | * prepare ioctl | |
1437 | */ | |
0df63e44 TI |
1438 | /* we use the second argument for updating f_flags */ |
1439 | static int snd_pcm_pre_prepare(struct snd_pcm_substream *substream, | |
1440 | int f_flags) | |
1da177e4 | 1441 | { |
877211f5 | 1442 | struct snd_pcm_runtime *runtime = substream->runtime; |
de1b8b93 TI |
1443 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN || |
1444 | runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED) | |
1da177e4 LT |
1445 | return -EBADFD; |
1446 | if (snd_pcm_running(substream)) | |
1447 | return -EBUSY; | |
0df63e44 | 1448 | substream->f_flags = f_flags; |
1da177e4 LT |
1449 | return 0; |
1450 | } | |
1451 | ||
877211f5 | 1452 | static int snd_pcm_do_prepare(struct snd_pcm_substream *substream, int state) |
1da177e4 LT |
1453 | { |
1454 | int err; | |
1455 | err = substream->ops->prepare(substream); | |
1456 | if (err < 0) | |
1457 | return err; | |
1458 | return snd_pcm_do_reset(substream, 0); | |
1459 | } | |
1460 | ||
877211f5 | 1461 | static void snd_pcm_post_prepare(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1462 | { |
877211f5 | 1463 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 | 1464 | runtime->control->appl_ptr = runtime->status->hw_ptr; |
9b0573c0 | 1465 | snd_pcm_set_state(substream, SNDRV_PCM_STATE_PREPARED); |
1da177e4 LT |
1466 | } |
1467 | ||
1468 | static struct action_ops snd_pcm_action_prepare = { | |
1469 | .pre_action = snd_pcm_pre_prepare, | |
1470 | .do_action = snd_pcm_do_prepare, | |
1471 | .post_action = snd_pcm_post_prepare | |
1472 | }; | |
1473 | ||
1474 | /** | |
1c85cc64 | 1475 | * snd_pcm_prepare - prepare the PCM substream to be triggerable |
df8db936 | 1476 | * @substream: the PCM substream instance |
0df63e44 | 1477 | * @file: file to refer f_flags |
eb7c06e8 YB |
1478 | * |
1479 | * Return: Zero if successful, or a negative error code. | |
1da177e4 | 1480 | */ |
0df63e44 TI |
1481 | static int snd_pcm_prepare(struct snd_pcm_substream *substream, |
1482 | struct file *file) | |
1da177e4 LT |
1483 | { |
1484 | int res; | |
877211f5 | 1485 | struct snd_card *card = substream->pcm->card; |
0df63e44 TI |
1486 | int f_flags; |
1487 | ||
1488 | if (file) | |
1489 | f_flags = file->f_flags; | |
1490 | else | |
1491 | f_flags = substream->f_flags; | |
1da177e4 LT |
1492 | |
1493 | snd_power_lock(card); | |
cbac4b0c | 1494 | if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0) |
0df63e44 TI |
1495 | res = snd_pcm_action_nonatomic(&snd_pcm_action_prepare, |
1496 | substream, f_flags); | |
1da177e4 LT |
1497 | snd_power_unlock(card); |
1498 | return res; | |
1499 | } | |
1500 | ||
1501 | /* | |
1502 | * drain ioctl | |
1503 | */ | |
1504 | ||
877211f5 | 1505 | static int snd_pcm_pre_drain_init(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1506 | { |
4f7c39dc TI |
1507 | struct snd_pcm_runtime *runtime = substream->runtime; |
1508 | switch (runtime->status->state) { | |
1509 | case SNDRV_PCM_STATE_OPEN: | |
1510 | case SNDRV_PCM_STATE_DISCONNECTED: | |
1511 | case SNDRV_PCM_STATE_SUSPENDED: | |
1512 | return -EBADFD; | |
1513 | } | |
1514 | runtime->trigger_master = substream; | |
1da177e4 LT |
1515 | return 0; |
1516 | } | |
1517 | ||
877211f5 | 1518 | static int snd_pcm_do_drain_init(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1519 | { |
877211f5 | 1520 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1521 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { |
1522 | switch (runtime->status->state) { | |
1523 | case SNDRV_PCM_STATE_PREPARED: | |
1524 | /* start playback stream if possible */ | |
1525 | if (! snd_pcm_playback_empty(substream)) { | |
1526 | snd_pcm_do_start(substream, SNDRV_PCM_STATE_DRAINING); | |
1527 | snd_pcm_post_start(substream, SNDRV_PCM_STATE_DRAINING); | |
1528 | } | |
1529 | break; | |
1530 | case SNDRV_PCM_STATE_RUNNING: | |
1531 | runtime->status->state = SNDRV_PCM_STATE_DRAINING; | |
1532 | break; | |
4f7c39dc TI |
1533 | case SNDRV_PCM_STATE_XRUN: |
1534 | runtime->status->state = SNDRV_PCM_STATE_SETUP; | |
1535 | break; | |
1da177e4 LT |
1536 | default: |
1537 | break; | |
1538 | } | |
1539 | } else { | |
1540 | /* stop running stream */ | |
1541 | if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) { | |
b05e5787 | 1542 | int new_state = snd_pcm_capture_avail(runtime) > 0 ? |
1da177e4 | 1543 | SNDRV_PCM_STATE_DRAINING : SNDRV_PCM_STATE_SETUP; |
b05e5787 MŚ |
1544 | snd_pcm_do_stop(substream, new_state); |
1545 | snd_pcm_post_stop(substream, new_state); | |
1da177e4 LT |
1546 | } |
1547 | } | |
1548 | return 0; | |
1549 | } | |
1550 | ||
877211f5 | 1551 | static void snd_pcm_post_drain_init(struct snd_pcm_substream *substream, int state) |
1da177e4 LT |
1552 | { |
1553 | } | |
1554 | ||
1555 | static struct action_ops snd_pcm_action_drain_init = { | |
1556 | .pre_action = snd_pcm_pre_drain_init, | |
1557 | .do_action = snd_pcm_do_drain_init, | |
1558 | .post_action = snd_pcm_post_drain_init | |
1559 | }; | |
1560 | ||
877211f5 | 1561 | static int snd_pcm_drop(struct snd_pcm_substream *substream); |
1da177e4 LT |
1562 | |
1563 | /* | |
1564 | * Drain the stream(s). | |
1565 | * When the substream is linked, sync until the draining of all playback streams | |
1566 | * is finished. | |
1567 | * After this call, all streams are supposed to be either SETUP or DRAINING | |
1568 | * (capture only) state. | |
1569 | */ | |
4cdc115f TI |
1570 | static int snd_pcm_drain(struct snd_pcm_substream *substream, |
1571 | struct file *file) | |
1da177e4 | 1572 | { |
877211f5 TI |
1573 | struct snd_card *card; |
1574 | struct snd_pcm_runtime *runtime; | |
ef991b95 | 1575 | struct snd_pcm_substream *s; |
d3a7dcfe | 1576 | wait_queue_t wait; |
1da177e4 | 1577 | int result = 0; |
4cdc115f | 1578 | int nonblock = 0; |
1da177e4 | 1579 | |
1da177e4 LT |
1580 | card = substream->pcm->card; |
1581 | runtime = substream->runtime; | |
1582 | ||
1583 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) | |
1584 | return -EBADFD; | |
1585 | ||
1da177e4 LT |
1586 | snd_power_lock(card); |
1587 | if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { | |
cbac4b0c | 1588 | result = snd_power_wait(card, SNDRV_CTL_POWER_D0); |
21cb2a2e TI |
1589 | if (result < 0) { |
1590 | snd_power_unlock(card); | |
1591 | return result; | |
1592 | } | |
1da177e4 LT |
1593 | } |
1594 | ||
4cdc115f TI |
1595 | if (file) { |
1596 | if (file->f_flags & O_NONBLOCK) | |
1597 | nonblock = 1; | |
1598 | } else if (substream->f_flags & O_NONBLOCK) | |
1599 | nonblock = 1; | |
1600 | ||
21cb2a2e | 1601 | down_read(&snd_pcm_link_rwsem); |
21cb2a2e TI |
1602 | snd_pcm_stream_lock_irq(substream); |
1603 | /* resume pause */ | |
d3a7dcfe | 1604 | if (runtime->status->state == SNDRV_PCM_STATE_PAUSED) |
21cb2a2e TI |
1605 | snd_pcm_pause(substream, 0); |
1606 | ||
1607 | /* pre-start/stop - all running streams are changed to DRAINING state */ | |
1608 | result = snd_pcm_action(&snd_pcm_action_drain_init, substream, 0); | |
4cdc115f TI |
1609 | if (result < 0) |
1610 | goto unlock; | |
1611 | /* in non-blocking, we don't wait in ioctl but let caller poll */ | |
1612 | if (nonblock) { | |
1613 | result = -EAGAIN; | |
1614 | goto unlock; | |
21cb2a2e | 1615 | } |
1da177e4 LT |
1616 | |
1617 | for (;;) { | |
1618 | long tout; | |
d3a7dcfe | 1619 | struct snd_pcm_runtime *to_check; |
1da177e4 LT |
1620 | if (signal_pending(current)) { |
1621 | result = -ERESTARTSYS; | |
1622 | break; | |
1623 | } | |
d3a7dcfe TI |
1624 | /* find a substream to drain */ |
1625 | to_check = NULL; | |
1626 | snd_pcm_group_for_each_entry(s, substream) { | |
1627 | if (s->stream != SNDRV_PCM_STREAM_PLAYBACK) | |
1628 | continue; | |
1629 | runtime = s->runtime; | |
1630 | if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) { | |
1631 | to_check = runtime; | |
21cb2a2e | 1632 | break; |
d3a7dcfe | 1633 | } |
21cb2a2e | 1634 | } |
d3a7dcfe TI |
1635 | if (!to_check) |
1636 | break; /* all drained */ | |
1637 | init_waitqueue_entry(&wait, current); | |
1638 | add_wait_queue(&to_check->sleep, &wait); | |
1da177e4 | 1639 | snd_pcm_stream_unlock_irq(substream); |
d3a7dcfe | 1640 | up_read(&snd_pcm_link_rwsem); |
1da177e4 | 1641 | snd_power_unlock(card); |
f2b3614c TI |
1642 | if (runtime->no_period_wakeup) |
1643 | tout = MAX_SCHEDULE_TIMEOUT; | |
1644 | else { | |
1645 | tout = 10; | |
1646 | if (runtime->rate) { | |
1647 | long t = runtime->period_size * 2 / runtime->rate; | |
1648 | tout = max(t, tout); | |
1649 | } | |
1650 | tout = msecs_to_jiffies(tout * 1000); | |
1651 | } | |
1652 | tout = schedule_timeout_interruptible(tout); | |
1da177e4 | 1653 | snd_power_lock(card); |
d3a7dcfe | 1654 | down_read(&snd_pcm_link_rwsem); |
1da177e4 | 1655 | snd_pcm_stream_lock_irq(substream); |
d3a7dcfe | 1656 | remove_wait_queue(&to_check->sleep, &wait); |
0914f796 TI |
1657 | if (card->shutdown) { |
1658 | result = -ENODEV; | |
1659 | break; | |
1660 | } | |
1da177e4 LT |
1661 | if (tout == 0) { |
1662 | if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) | |
1663 | result = -ESTRPIPE; | |
1664 | else { | |
09e56df8 TI |
1665 | dev_dbg(substream->pcm->card->dev, |
1666 | "playback drain error (DMA or IRQ trouble?)\n"); | |
1da177e4 LT |
1667 | snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP); |
1668 | result = -EIO; | |
1669 | } | |
1670 | break; | |
1671 | } | |
1da177e4 | 1672 | } |
21cb2a2e | 1673 | |
4cdc115f | 1674 | unlock: |
21cb2a2e | 1675 | snd_pcm_stream_unlock_irq(substream); |
d3a7dcfe | 1676 | up_read(&snd_pcm_link_rwsem); |
1da177e4 | 1677 | snd_power_unlock(card); |
1da177e4 LT |
1678 | |
1679 | return result; | |
1680 | } | |
1681 | ||
1682 | /* | |
1683 | * drop ioctl | |
1684 | * | |
1685 | * Immediately put all linked substreams into SETUP state. | |
1686 | */ | |
877211f5 | 1687 | static int snd_pcm_drop(struct snd_pcm_substream *substream) |
1da177e4 | 1688 | { |
877211f5 | 1689 | struct snd_pcm_runtime *runtime; |
1da177e4 LT |
1690 | int result = 0; |
1691 | ||
7eaa943c TI |
1692 | if (PCM_RUNTIME_CHECK(substream)) |
1693 | return -ENXIO; | |
1da177e4 | 1694 | runtime = substream->runtime; |
1da177e4 | 1695 | |
de1b8b93 | 1696 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN || |
24e8fc49 TI |
1697 | runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED || |
1698 | runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) | |
1da177e4 LT |
1699 | return -EBADFD; |
1700 | ||
1da177e4 LT |
1701 | snd_pcm_stream_lock_irq(substream); |
1702 | /* resume pause */ | |
1703 | if (runtime->status->state == SNDRV_PCM_STATE_PAUSED) | |
1704 | snd_pcm_pause(substream, 0); | |
1705 | ||
1706 | snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP); | |
1707 | /* runtime->control->appl_ptr = runtime->status->hw_ptr; */ | |
1708 | snd_pcm_stream_unlock_irq(substream); | |
24e8fc49 | 1709 | |
1da177e4 LT |
1710 | return result; |
1711 | } | |
1712 | ||
1713 | ||
0888c321 | 1714 | static bool is_pcm_file(struct file *file) |
1da177e4 | 1715 | { |
0888c321 | 1716 | struct inode *inode = file_inode(file); |
f87135f5 CL |
1717 | unsigned int minor; |
1718 | ||
0888c321 AV |
1719 | if (!S_ISCHR(inode->i_mode) || imajor(inode) != snd_major) |
1720 | return false; | |
1da177e4 | 1721 | minor = iminor(inode); |
0888c321 AV |
1722 | return snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_PLAYBACK) || |
1723 | snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_CAPTURE); | |
1da177e4 LT |
1724 | } |
1725 | ||
1726 | /* | |
1727 | * PCM link handling | |
1728 | */ | |
877211f5 | 1729 | static int snd_pcm_link(struct snd_pcm_substream *substream, int fd) |
1da177e4 LT |
1730 | { |
1731 | int res = 0; | |
877211f5 TI |
1732 | struct snd_pcm_file *pcm_file; |
1733 | struct snd_pcm_substream *substream1; | |
1662591b | 1734 | struct snd_pcm_group *group; |
0888c321 | 1735 | struct fd f = fdget(fd); |
1da177e4 | 1736 | |
0888c321 | 1737 | if (!f.file) |
1da177e4 | 1738 | return -EBADFD; |
0888c321 AV |
1739 | if (!is_pcm_file(f.file)) { |
1740 | res = -EBADFD; | |
1741 | goto _badf; | |
1742 | } | |
1743 | pcm_file = f.file->private_data; | |
1da177e4 | 1744 | substream1 = pcm_file->substream; |
1662591b TI |
1745 | group = kmalloc(sizeof(*group), GFP_KERNEL); |
1746 | if (!group) { | |
1747 | res = -ENOMEM; | |
1748 | goto _nolock; | |
1749 | } | |
1da177e4 LT |
1750 | down_write(&snd_pcm_link_rwsem); |
1751 | write_lock_irq(&snd_pcm_link_rwlock); | |
1752 | if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN || | |
257f8cce TI |
1753 | substream->runtime->status->state != substream1->runtime->status->state || |
1754 | substream->pcm->nonatomic != substream1->pcm->nonatomic) { | |
1da177e4 LT |
1755 | res = -EBADFD; |
1756 | goto _end; | |
1757 | } | |
1758 | if (snd_pcm_stream_linked(substream1)) { | |
1759 | res = -EALREADY; | |
1760 | goto _end; | |
1761 | } | |
1762 | if (!snd_pcm_stream_linked(substream)) { | |
1662591b | 1763 | substream->group = group; |
dd6c5cd8 | 1764 | group = NULL; |
1da177e4 | 1765 | spin_lock_init(&substream->group->lock); |
257f8cce | 1766 | mutex_init(&substream->group->mutex); |
1da177e4 LT |
1767 | INIT_LIST_HEAD(&substream->group->substreams); |
1768 | list_add_tail(&substream->link_list, &substream->group->substreams); | |
1769 | substream->group->count = 1; | |
1770 | } | |
1771 | list_add_tail(&substream1->link_list, &substream->group->substreams); | |
1772 | substream->group->count++; | |
1773 | substream1->group = substream->group; | |
1774 | _end: | |
1775 | write_unlock_irq(&snd_pcm_link_rwlock); | |
1776 | up_write(&snd_pcm_link_rwsem); | |
1662591b | 1777 | _nolock: |
a0830dbd | 1778 | snd_card_unref(substream1->pcm->card); |
dd6c5cd8 | 1779 | kfree(group); |
0888c321 AV |
1780 | _badf: |
1781 | fdput(f); | |
1da177e4 LT |
1782 | return res; |
1783 | } | |
1784 | ||
877211f5 | 1785 | static void relink_to_local(struct snd_pcm_substream *substream) |
1da177e4 LT |
1786 | { |
1787 | substream->group = &substream->self_group; | |
1788 | INIT_LIST_HEAD(&substream->self_group.substreams); | |
1789 | list_add_tail(&substream->link_list, &substream->self_group.substreams); | |
1790 | } | |
1791 | ||
877211f5 | 1792 | static int snd_pcm_unlink(struct snd_pcm_substream *substream) |
1da177e4 | 1793 | { |
ef991b95 | 1794 | struct snd_pcm_substream *s; |
1da177e4 LT |
1795 | int res = 0; |
1796 | ||
1797 | down_write(&snd_pcm_link_rwsem); | |
1798 | write_lock_irq(&snd_pcm_link_rwlock); | |
1799 | if (!snd_pcm_stream_linked(substream)) { | |
1800 | res = -EALREADY; | |
1801 | goto _end; | |
1802 | } | |
1803 | list_del(&substream->link_list); | |
1804 | substream->group->count--; | |
1805 | if (substream->group->count == 1) { /* detach the last stream, too */ | |
ef991b95 TI |
1806 | snd_pcm_group_for_each_entry(s, substream) { |
1807 | relink_to_local(s); | |
1da177e4 LT |
1808 | break; |
1809 | } | |
1810 | kfree(substream->group); | |
1811 | } | |
1812 | relink_to_local(substream); | |
1813 | _end: | |
1814 | write_unlock_irq(&snd_pcm_link_rwlock); | |
1815 | up_write(&snd_pcm_link_rwsem); | |
1816 | return res; | |
1817 | } | |
1818 | ||
1819 | /* | |
1820 | * hw configurator | |
1821 | */ | |
877211f5 TI |
1822 | static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params *params, |
1823 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 1824 | { |
877211f5 | 1825 | struct snd_interval t; |
1da177e4 LT |
1826 | snd_interval_mul(hw_param_interval_c(params, rule->deps[0]), |
1827 | hw_param_interval_c(params, rule->deps[1]), &t); | |
1828 | return snd_interval_refine(hw_param_interval(params, rule->var), &t); | |
1829 | } | |
1830 | ||
877211f5 TI |
1831 | static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params *params, |
1832 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 1833 | { |
877211f5 | 1834 | struct snd_interval t; |
1da177e4 LT |
1835 | snd_interval_div(hw_param_interval_c(params, rule->deps[0]), |
1836 | hw_param_interval_c(params, rule->deps[1]), &t); | |
1837 | return snd_interval_refine(hw_param_interval(params, rule->var), &t); | |
1838 | } | |
1839 | ||
877211f5 TI |
1840 | static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params *params, |
1841 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 1842 | { |
877211f5 | 1843 | struct snd_interval t; |
1da177e4 LT |
1844 | snd_interval_muldivk(hw_param_interval_c(params, rule->deps[0]), |
1845 | hw_param_interval_c(params, rule->deps[1]), | |
1846 | (unsigned long) rule->private, &t); | |
1847 | return snd_interval_refine(hw_param_interval(params, rule->var), &t); | |
1848 | } | |
1849 | ||
877211f5 TI |
1850 | static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params *params, |
1851 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 1852 | { |
877211f5 | 1853 | struct snd_interval t; |
1da177e4 LT |
1854 | snd_interval_mulkdiv(hw_param_interval_c(params, rule->deps[0]), |
1855 | (unsigned long) rule->private, | |
1856 | hw_param_interval_c(params, rule->deps[1]), &t); | |
1857 | return snd_interval_refine(hw_param_interval(params, rule->var), &t); | |
1858 | } | |
1859 | ||
877211f5 TI |
1860 | static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params *params, |
1861 | struct snd_pcm_hw_rule *rule) | |
1da177e4 LT |
1862 | { |
1863 | unsigned int k; | |
877211f5 TI |
1864 | struct snd_interval *i = hw_param_interval(params, rule->deps[0]); |
1865 | struct snd_mask m; | |
1866 | struct snd_mask *mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); | |
1da177e4 LT |
1867 | snd_mask_any(&m); |
1868 | for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) { | |
1869 | int bits; | |
1870 | if (! snd_mask_test(mask, k)) | |
1871 | continue; | |
1872 | bits = snd_pcm_format_physical_width(k); | |
1873 | if (bits <= 0) | |
1874 | continue; /* ignore invalid formats */ | |
1875 | if ((unsigned)bits < i->min || (unsigned)bits > i->max) | |
1876 | snd_mask_reset(&m, k); | |
1877 | } | |
1878 | return snd_mask_refine(mask, &m); | |
1879 | } | |
1880 | ||
877211f5 TI |
1881 | static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params *params, |
1882 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 1883 | { |
877211f5 | 1884 | struct snd_interval t; |
1da177e4 LT |
1885 | unsigned int k; |
1886 | t.min = UINT_MAX; | |
1887 | t.max = 0; | |
1888 | t.openmin = 0; | |
1889 | t.openmax = 0; | |
1890 | for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) { | |
1891 | int bits; | |
1892 | if (! snd_mask_test(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), k)) | |
1893 | continue; | |
1894 | bits = snd_pcm_format_physical_width(k); | |
1895 | if (bits <= 0) | |
1896 | continue; /* ignore invalid formats */ | |
1897 | if (t.min > (unsigned)bits) | |
1898 | t.min = bits; | |
1899 | if (t.max < (unsigned)bits) | |
1900 | t.max = bits; | |
1901 | } | |
1902 | t.integer = 1; | |
1903 | return snd_interval_refine(hw_param_interval(params, rule->var), &t); | |
1904 | } | |
1905 | ||
1906 | #if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12 | |
1907 | #error "Change this table" | |
1908 | #endif | |
1909 | ||
1910 | static unsigned int rates[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100, | |
1911 | 48000, 64000, 88200, 96000, 176400, 192000 }; | |
1912 | ||
7653d557 CL |
1913 | const struct snd_pcm_hw_constraint_list snd_pcm_known_rates = { |
1914 | .count = ARRAY_SIZE(rates), | |
1915 | .list = rates, | |
1916 | }; | |
1917 | ||
877211f5 TI |
1918 | static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params *params, |
1919 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 1920 | { |
877211f5 | 1921 | struct snd_pcm_hardware *hw = rule->private; |
1da177e4 | 1922 | return snd_interval_list(hw_param_interval(params, rule->var), |
7653d557 CL |
1923 | snd_pcm_known_rates.count, |
1924 | snd_pcm_known_rates.list, hw->rates); | |
1da177e4 LT |
1925 | } |
1926 | ||
877211f5 TI |
1927 | static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params *params, |
1928 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 1929 | { |
877211f5 TI |
1930 | struct snd_interval t; |
1931 | struct snd_pcm_substream *substream = rule->private; | |
1da177e4 LT |
1932 | t.min = 0; |
1933 | t.max = substream->buffer_bytes_max; | |
1934 | t.openmin = 0; | |
1935 | t.openmax = 0; | |
1936 | t.integer = 1; | |
1937 | return snd_interval_refine(hw_param_interval(params, rule->var), &t); | |
1938 | } | |
1939 | ||
877211f5 | 1940 | int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream) |
1da177e4 | 1941 | { |
877211f5 TI |
1942 | struct snd_pcm_runtime *runtime = substream->runtime; |
1943 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; | |
1da177e4 LT |
1944 | int k, err; |
1945 | ||
1946 | for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) { | |
1947 | snd_mask_any(constrs_mask(constrs, k)); | |
1948 | } | |
1949 | ||
1950 | for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) { | |
1951 | snd_interval_any(constrs_interval(constrs, k)); | |
1952 | } | |
1953 | ||
1954 | snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS)); | |
1955 | snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE)); | |
1956 | snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES)); | |
1957 | snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS)); | |
1958 | snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS)); | |
1959 | ||
1960 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT, | |
1961 | snd_pcm_hw_rule_format, NULL, | |
1962 | SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); | |
1963 | if (err < 0) | |
1964 | return err; | |
1965 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, | |
1966 | snd_pcm_hw_rule_sample_bits, NULL, | |
1967 | SNDRV_PCM_HW_PARAM_FORMAT, | |
1968 | SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); | |
1969 | if (err < 0) | |
1970 | return err; | |
1971 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, | |
1972 | snd_pcm_hw_rule_div, NULL, | |
1973 | SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1); | |
1974 | if (err < 0) | |
1975 | return err; | |
1976 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, | |
1977 | snd_pcm_hw_rule_mul, NULL, | |
1978 | SNDRV_PCM_HW_PARAM_SAMPLE_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1); | |
1979 | if (err < 0) | |
1980 | return err; | |
1981 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, | |
1982 | snd_pcm_hw_rule_mulkdiv, (void*) 8, | |
1983 | SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1); | |
1984 | if (err < 0) | |
1985 | return err; | |
1986 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, | |
1987 | snd_pcm_hw_rule_mulkdiv, (void*) 8, | |
1988 | SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1); | |
1989 | if (err < 0) | |
1990 | return err; | |
1991 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS, | |
1992 | snd_pcm_hw_rule_div, NULL, | |
1993 | SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); | |
1994 | if (err < 0) | |
1995 | return err; | |
1996 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, | |
1997 | snd_pcm_hw_rule_mulkdiv, (void*) 1000000, | |
1998 | SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, -1); | |
1999 | if (err < 0) | |
2000 | return err; | |
2001 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, | |
2002 | snd_pcm_hw_rule_mulkdiv, (void*) 1000000, | |
2003 | SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_BUFFER_TIME, -1); | |
2004 | if (err < 0) | |
2005 | return err; | |
2006 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS, | |
2007 | snd_pcm_hw_rule_div, NULL, | |
2008 | SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1); | |
2009 | if (err < 0) | |
2010 | return err; | |
2011 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, | |
2012 | snd_pcm_hw_rule_div, NULL, | |
2013 | SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1); | |
2014 | if (err < 0) | |
2015 | return err; | |
2016 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, | |
2017 | snd_pcm_hw_rule_mulkdiv, (void*) 8, | |
2018 | SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); | |
2019 | if (err < 0) | |
2020 | return err; | |
2021 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, | |
2022 | snd_pcm_hw_rule_muldivk, (void*) 1000000, | |
2023 | SNDRV_PCM_HW_PARAM_PERIOD_TIME, SNDRV_PCM_HW_PARAM_RATE, -1); | |
2024 | if (err < 0) | |
2025 | return err; | |
2026 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, | |
2027 | snd_pcm_hw_rule_mul, NULL, | |
2028 | SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1); | |
2029 | if (err < 0) | |
2030 | return err; | |
2031 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, | |
2032 | snd_pcm_hw_rule_mulkdiv, (void*) 8, | |
2033 | SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); | |
2034 | if (err < 0) | |
2035 | return err; | |
2036 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, | |
2037 | snd_pcm_hw_rule_muldivk, (void*) 1000000, | |
2038 | SNDRV_PCM_HW_PARAM_BUFFER_TIME, SNDRV_PCM_HW_PARAM_RATE, -1); | |
2039 | if (err < 0) | |
2040 | return err; | |
2041 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, | |
2042 | snd_pcm_hw_rule_muldivk, (void*) 8, | |
2043 | SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); | |
2044 | if (err < 0) | |
2045 | return err; | |
2046 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, | |
2047 | snd_pcm_hw_rule_muldivk, (void*) 8, | |
2048 | SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); | |
2049 | if (err < 0) | |
2050 | return err; | |
2051 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME, | |
2052 | snd_pcm_hw_rule_mulkdiv, (void*) 1000000, | |
2053 | SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1); | |
2054 | if (err < 0) | |
2055 | return err; | |
2056 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME, | |
2057 | snd_pcm_hw_rule_mulkdiv, (void*) 1000000, | |
2058 | SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1); | |
2059 | if (err < 0) | |
2060 | return err; | |
2061 | return 0; | |
2062 | } | |
2063 | ||
877211f5 | 2064 | int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream) |
1da177e4 | 2065 | { |
877211f5 TI |
2066 | struct snd_pcm_runtime *runtime = substream->runtime; |
2067 | struct snd_pcm_hardware *hw = &runtime->hw; | |
1da177e4 LT |
2068 | int err; |
2069 | unsigned int mask = 0; | |
2070 | ||
2071 | if (hw->info & SNDRV_PCM_INFO_INTERLEAVED) | |
2072 | mask |= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED; | |
2073 | if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED) | |
2074 | mask |= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED; | |
2075 | if (hw->info & SNDRV_PCM_INFO_MMAP) { | |
2076 | if (hw->info & SNDRV_PCM_INFO_INTERLEAVED) | |
2077 | mask |= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED; | |
2078 | if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED) | |
2079 | mask |= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED; | |
2080 | if (hw->info & SNDRV_PCM_INFO_COMPLEX) | |
2081 | mask |= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX; | |
2082 | } | |
2083 | err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask); | |
7eaa943c TI |
2084 | if (err < 0) |
2085 | return err; | |
1da177e4 LT |
2086 | |
2087 | err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats); | |
7eaa943c TI |
2088 | if (err < 0) |
2089 | return err; | |
1da177e4 LT |
2090 | |
2091 | err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT, 1 << SNDRV_PCM_SUBFORMAT_STD); | |
7eaa943c TI |
2092 | if (err < 0) |
2093 | return err; | |
1da177e4 LT |
2094 | |
2095 | err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS, | |
2096 | hw->channels_min, hw->channels_max); | |
7eaa943c TI |
2097 | if (err < 0) |
2098 | return err; | |
1da177e4 LT |
2099 | |
2100 | err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE, | |
2101 | hw->rate_min, hw->rate_max); | |
8b90ca08 GL |
2102 | if (err < 0) |
2103 | return err; | |
1da177e4 LT |
2104 | |
2105 | err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, | |
2106 | hw->period_bytes_min, hw->period_bytes_max); | |
8b90ca08 GL |
2107 | if (err < 0) |
2108 | return err; | |
1da177e4 LT |
2109 | |
2110 | err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS, | |
2111 | hw->periods_min, hw->periods_max); | |
7eaa943c TI |
2112 | if (err < 0) |
2113 | return err; | |
1da177e4 LT |
2114 | |
2115 | err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, | |
2116 | hw->period_bytes_min, hw->buffer_bytes_max); | |
7eaa943c TI |
2117 | if (err < 0) |
2118 | return err; | |
1da177e4 LT |
2119 | |
2120 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, | |
2121 | snd_pcm_hw_rule_buffer_bytes_max, substream, | |
2122 | SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1); | |
2123 | if (err < 0) | |
2124 | return err; | |
2125 | ||
2126 | /* FIXME: remove */ | |
2127 | if (runtime->dma_bytes) { | |
2128 | err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes); | |
7eaa943c | 2129 | if (err < 0) |
6cf95152 | 2130 | return err; |
1da177e4 LT |
2131 | } |
2132 | ||
2133 | if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) { | |
2134 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, | |
2135 | snd_pcm_hw_rule_rate, hw, | |
2136 | SNDRV_PCM_HW_PARAM_RATE, -1); | |
2137 | if (err < 0) | |
2138 | return err; | |
2139 | } | |
2140 | ||
2141 | /* FIXME: this belong to lowlevel */ | |
1da177e4 LT |
2142 | snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE); |
2143 | ||
2144 | return 0; | |
2145 | } | |
2146 | ||
3bf75f9b | 2147 | static void pcm_release_private(struct snd_pcm_substream *substream) |
1da177e4 | 2148 | { |
1da177e4 | 2149 | snd_pcm_unlink(substream); |
3bf75f9b TI |
2150 | } |
2151 | ||
2152 | void snd_pcm_release_substream(struct snd_pcm_substream *substream) | |
2153 | { | |
0df63e44 TI |
2154 | substream->ref_count--; |
2155 | if (substream->ref_count > 0) | |
2156 | return; | |
2157 | ||
3bf75f9b | 2158 | snd_pcm_drop(substream); |
3bf75f9b | 2159 | if (substream->hw_opened) { |
1da177e4 LT |
2160 | if (substream->ops->hw_free != NULL) |
2161 | substream->ops->hw_free(substream); | |
2162 | substream->ops->close(substream); | |
3bf75f9b | 2163 | substream->hw_opened = 0; |
1da177e4 | 2164 | } |
8699a0b6 TI |
2165 | if (pm_qos_request_active(&substream->latency_pm_qos_req)) |
2166 | pm_qos_remove_request(&substream->latency_pm_qos_req); | |
1576274d TI |
2167 | if (substream->pcm_release) { |
2168 | substream->pcm_release(substream); | |
2169 | substream->pcm_release = NULL; | |
2170 | } | |
3bf75f9b TI |
2171 | snd_pcm_detach_substream(substream); |
2172 | } | |
2173 | ||
e88e8ae6 TI |
2174 | EXPORT_SYMBOL(snd_pcm_release_substream); |
2175 | ||
3bf75f9b TI |
2176 | int snd_pcm_open_substream(struct snd_pcm *pcm, int stream, |
2177 | struct file *file, | |
2178 | struct snd_pcm_substream **rsubstream) | |
2179 | { | |
2180 | struct snd_pcm_substream *substream; | |
2181 | int err; | |
2182 | ||
2183 | err = snd_pcm_attach_substream(pcm, stream, file, &substream); | |
2184 | if (err < 0) | |
2185 | return err; | |
0df63e44 TI |
2186 | if (substream->ref_count > 1) { |
2187 | *rsubstream = substream; | |
2188 | return 0; | |
2189 | } | |
2190 | ||
3bf75f9b TI |
2191 | err = snd_pcm_hw_constraints_init(substream); |
2192 | if (err < 0) { | |
09e56df8 | 2193 | pcm_dbg(pcm, "snd_pcm_hw_constraints_init failed\n"); |
3bf75f9b TI |
2194 | goto error; |
2195 | } | |
2196 | ||
2197 | if ((err = substream->ops->open(substream)) < 0) | |
2198 | goto error; | |
2199 | ||
2200 | substream->hw_opened = 1; | |
2201 | ||
2202 | err = snd_pcm_hw_constraints_complete(substream); | |
2203 | if (err < 0) { | |
09e56df8 | 2204 | pcm_dbg(pcm, "snd_pcm_hw_constraints_complete failed\n"); |
3bf75f9b TI |
2205 | goto error; |
2206 | } | |
2207 | ||
2208 | *rsubstream = substream; | |
1da177e4 | 2209 | return 0; |
3bf75f9b TI |
2210 | |
2211 | error: | |
2212 | snd_pcm_release_substream(substream); | |
2213 | return err; | |
1da177e4 LT |
2214 | } |
2215 | ||
e88e8ae6 TI |
2216 | EXPORT_SYMBOL(snd_pcm_open_substream); |
2217 | ||
1da177e4 | 2218 | static int snd_pcm_open_file(struct file *file, |
877211f5 | 2219 | struct snd_pcm *pcm, |
ffd3d5c6 | 2220 | int stream) |
1da177e4 | 2221 | { |
877211f5 TI |
2222 | struct snd_pcm_file *pcm_file; |
2223 | struct snd_pcm_substream *substream; | |
3bf75f9b | 2224 | int err; |
1da177e4 | 2225 | |
3bf75f9b TI |
2226 | err = snd_pcm_open_substream(pcm, stream, file, &substream); |
2227 | if (err < 0) | |
2228 | return err; | |
2229 | ||
548a648b TI |
2230 | pcm_file = kzalloc(sizeof(*pcm_file), GFP_KERNEL); |
2231 | if (pcm_file == NULL) { | |
2232 | snd_pcm_release_substream(substream); | |
2233 | return -ENOMEM; | |
2234 | } | |
2235 | pcm_file->substream = substream; | |
2236 | if (substream->ref_count == 1) { | |
0df63e44 TI |
2237 | substream->file = pcm_file; |
2238 | substream->pcm_release = pcm_release_private; | |
1da177e4 | 2239 | } |
1da177e4 | 2240 | file->private_data = pcm_file; |
ffd3d5c6 | 2241 | |
1da177e4 LT |
2242 | return 0; |
2243 | } | |
2244 | ||
f87135f5 CL |
2245 | static int snd_pcm_playback_open(struct inode *inode, struct file *file) |
2246 | { | |
2247 | struct snd_pcm *pcm; | |
02f4865f TI |
2248 | int err = nonseekable_open(inode, file); |
2249 | if (err < 0) | |
2250 | return err; | |
f87135f5 CL |
2251 | pcm = snd_lookup_minor_data(iminor(inode), |
2252 | SNDRV_DEVICE_TYPE_PCM_PLAYBACK); | |
a0830dbd | 2253 | err = snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_PLAYBACK); |
8bb4d9ce TI |
2254 | if (pcm) |
2255 | snd_card_unref(pcm->card); | |
a0830dbd | 2256 | return err; |
f87135f5 CL |
2257 | } |
2258 | ||
2259 | static int snd_pcm_capture_open(struct inode *inode, struct file *file) | |
1da177e4 | 2260 | { |
877211f5 | 2261 | struct snd_pcm *pcm; |
02f4865f TI |
2262 | int err = nonseekable_open(inode, file); |
2263 | if (err < 0) | |
2264 | return err; | |
f87135f5 CL |
2265 | pcm = snd_lookup_minor_data(iminor(inode), |
2266 | SNDRV_DEVICE_TYPE_PCM_CAPTURE); | |
a0830dbd | 2267 | err = snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_CAPTURE); |
8bb4d9ce TI |
2268 | if (pcm) |
2269 | snd_card_unref(pcm->card); | |
a0830dbd | 2270 | return err; |
f87135f5 CL |
2271 | } |
2272 | ||
2273 | static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream) | |
2274 | { | |
2275 | int err; | |
1da177e4 LT |
2276 | wait_queue_t wait; |
2277 | ||
1da177e4 LT |
2278 | if (pcm == NULL) { |
2279 | err = -ENODEV; | |
2280 | goto __error1; | |
2281 | } | |
2282 | err = snd_card_file_add(pcm->card, file); | |
2283 | if (err < 0) | |
2284 | goto __error1; | |
2285 | if (!try_module_get(pcm->card->module)) { | |
2286 | err = -EFAULT; | |
2287 | goto __error2; | |
2288 | } | |
2289 | init_waitqueue_entry(&wait, current); | |
2290 | add_wait_queue(&pcm->open_wait, &wait); | |
1a60d4c5 | 2291 | mutex_lock(&pcm->open_mutex); |
1da177e4 | 2292 | while (1) { |
ffd3d5c6 | 2293 | err = snd_pcm_open_file(file, pcm, stream); |
1da177e4 LT |
2294 | if (err >= 0) |
2295 | break; | |
2296 | if (err == -EAGAIN) { | |
2297 | if (file->f_flags & O_NONBLOCK) { | |
2298 | err = -EBUSY; | |
2299 | break; | |
2300 | } | |
2301 | } else | |
2302 | break; | |
2303 | set_current_state(TASK_INTERRUPTIBLE); | |
1a60d4c5 | 2304 | mutex_unlock(&pcm->open_mutex); |
1da177e4 | 2305 | schedule(); |
1a60d4c5 | 2306 | mutex_lock(&pcm->open_mutex); |
0914f796 TI |
2307 | if (pcm->card->shutdown) { |
2308 | err = -ENODEV; | |
2309 | break; | |
2310 | } | |
1da177e4 LT |
2311 | if (signal_pending(current)) { |
2312 | err = -ERESTARTSYS; | |
2313 | break; | |
2314 | } | |
2315 | } | |
2316 | remove_wait_queue(&pcm->open_wait, &wait); | |
1a60d4c5 | 2317 | mutex_unlock(&pcm->open_mutex); |
1da177e4 LT |
2318 | if (err < 0) |
2319 | goto __error; | |
2320 | return err; | |
2321 | ||
2322 | __error: | |
2323 | module_put(pcm->card->module); | |
2324 | __error2: | |
2325 | snd_card_file_remove(pcm->card, file); | |
2326 | __error1: | |
2327 | return err; | |
2328 | } | |
2329 | ||
2330 | static int snd_pcm_release(struct inode *inode, struct file *file) | |
2331 | { | |
877211f5 TI |
2332 | struct snd_pcm *pcm; |
2333 | struct snd_pcm_substream *substream; | |
2334 | struct snd_pcm_file *pcm_file; | |
1da177e4 LT |
2335 | |
2336 | pcm_file = file->private_data; | |
2337 | substream = pcm_file->substream; | |
7eaa943c TI |
2338 | if (snd_BUG_ON(!substream)) |
2339 | return -ENXIO; | |
1da177e4 | 2340 | pcm = substream->pcm; |
1a60d4c5 | 2341 | mutex_lock(&pcm->open_mutex); |
3bf75f9b | 2342 | snd_pcm_release_substream(substream); |
548a648b | 2343 | kfree(pcm_file); |
1a60d4c5 | 2344 | mutex_unlock(&pcm->open_mutex); |
1da177e4 LT |
2345 | wake_up(&pcm->open_wait); |
2346 | module_put(pcm->card->module); | |
2347 | snd_card_file_remove(pcm->card, file); | |
2348 | return 0; | |
2349 | } | |
2350 | ||
877211f5 TI |
2351 | static snd_pcm_sframes_t snd_pcm_playback_rewind(struct snd_pcm_substream *substream, |
2352 | snd_pcm_uframes_t frames) | |
1da177e4 | 2353 | { |
877211f5 | 2354 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
2355 | snd_pcm_sframes_t appl_ptr; |
2356 | snd_pcm_sframes_t ret; | |
2357 | snd_pcm_sframes_t hw_avail; | |
2358 | ||
2359 | if (frames == 0) | |
2360 | return 0; | |
2361 | ||
2362 | snd_pcm_stream_lock_irq(substream); | |
2363 | switch (runtime->status->state) { | |
2364 | case SNDRV_PCM_STATE_PREPARED: | |
2365 | break; | |
2366 | case SNDRV_PCM_STATE_DRAINING: | |
2367 | case SNDRV_PCM_STATE_RUNNING: | |
2368 | if (snd_pcm_update_hw_ptr(substream) >= 0) | |
2369 | break; | |
2370 | /* Fall through */ | |
2371 | case SNDRV_PCM_STATE_XRUN: | |
2372 | ret = -EPIPE; | |
2373 | goto __end; | |
51840409 LR |
2374 | case SNDRV_PCM_STATE_SUSPENDED: |
2375 | ret = -ESTRPIPE; | |
2376 | goto __end; | |
1da177e4 LT |
2377 | default: |
2378 | ret = -EBADFD; | |
2379 | goto __end; | |
2380 | } | |
2381 | ||
2382 | hw_avail = snd_pcm_playback_hw_avail(runtime); | |
2383 | if (hw_avail <= 0) { | |
2384 | ret = 0; | |
2385 | goto __end; | |
2386 | } | |
2387 | if (frames > (snd_pcm_uframes_t)hw_avail) | |
2388 | frames = hw_avail; | |
1da177e4 LT |
2389 | appl_ptr = runtime->control->appl_ptr - frames; |
2390 | if (appl_ptr < 0) | |
2391 | appl_ptr += runtime->boundary; | |
2392 | runtime->control->appl_ptr = appl_ptr; | |
1da177e4 LT |
2393 | ret = frames; |
2394 | __end: | |
2395 | snd_pcm_stream_unlock_irq(substream); | |
2396 | return ret; | |
2397 | } | |
2398 | ||
877211f5 TI |
2399 | static snd_pcm_sframes_t snd_pcm_capture_rewind(struct snd_pcm_substream *substream, |
2400 | snd_pcm_uframes_t frames) | |
1da177e4 | 2401 | { |
877211f5 | 2402 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
2403 | snd_pcm_sframes_t appl_ptr; |
2404 | snd_pcm_sframes_t ret; | |
2405 | snd_pcm_sframes_t hw_avail; | |
2406 | ||
2407 | if (frames == 0) | |
2408 | return 0; | |
2409 | ||
2410 | snd_pcm_stream_lock_irq(substream); | |
2411 | switch (runtime->status->state) { | |
2412 | case SNDRV_PCM_STATE_PREPARED: | |
2413 | case SNDRV_PCM_STATE_DRAINING: | |
2414 | break; | |
2415 | case SNDRV_PCM_STATE_RUNNING: | |
2416 | if (snd_pcm_update_hw_ptr(substream) >= 0) | |
2417 | break; | |
2418 | /* Fall through */ | |
2419 | case SNDRV_PCM_STATE_XRUN: | |
2420 | ret = -EPIPE; | |
2421 | goto __end; | |
51840409 LR |
2422 | case SNDRV_PCM_STATE_SUSPENDED: |
2423 | ret = -ESTRPIPE; | |
2424 | goto __end; | |
1da177e4 LT |
2425 | default: |
2426 | ret = -EBADFD; | |
2427 | goto __end; | |
2428 | } | |
2429 | ||
2430 | hw_avail = snd_pcm_capture_hw_avail(runtime); | |
2431 | if (hw_avail <= 0) { | |
2432 | ret = 0; | |
2433 | goto __end; | |
2434 | } | |
2435 | if (frames > (snd_pcm_uframes_t)hw_avail) | |
2436 | frames = hw_avail; | |
1da177e4 LT |
2437 | appl_ptr = runtime->control->appl_ptr - frames; |
2438 | if (appl_ptr < 0) | |
2439 | appl_ptr += runtime->boundary; | |
2440 | runtime->control->appl_ptr = appl_ptr; | |
1da177e4 LT |
2441 | ret = frames; |
2442 | __end: | |
2443 | snd_pcm_stream_unlock_irq(substream); | |
2444 | return ret; | |
2445 | } | |
2446 | ||
877211f5 TI |
2447 | static snd_pcm_sframes_t snd_pcm_playback_forward(struct snd_pcm_substream *substream, |
2448 | snd_pcm_uframes_t frames) | |
1da177e4 | 2449 | { |
877211f5 | 2450 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
2451 | snd_pcm_sframes_t appl_ptr; |
2452 | snd_pcm_sframes_t ret; | |
2453 | snd_pcm_sframes_t avail; | |
2454 | ||
2455 | if (frames == 0) | |
2456 | return 0; | |
2457 | ||
2458 | snd_pcm_stream_lock_irq(substream); | |
2459 | switch (runtime->status->state) { | |
2460 | case SNDRV_PCM_STATE_PREPARED: | |
2461 | case SNDRV_PCM_STATE_PAUSED: | |
2462 | break; | |
2463 | case SNDRV_PCM_STATE_DRAINING: | |
2464 | case SNDRV_PCM_STATE_RUNNING: | |
2465 | if (snd_pcm_update_hw_ptr(substream) >= 0) | |
2466 | break; | |
2467 | /* Fall through */ | |
2468 | case SNDRV_PCM_STATE_XRUN: | |
2469 | ret = -EPIPE; | |
2470 | goto __end; | |
51840409 LR |
2471 | case SNDRV_PCM_STATE_SUSPENDED: |
2472 | ret = -ESTRPIPE; | |
2473 | goto __end; | |
1da177e4 LT |
2474 | default: |
2475 | ret = -EBADFD; | |
2476 | goto __end; | |
2477 | } | |
2478 | ||
2479 | avail = snd_pcm_playback_avail(runtime); | |
2480 | if (avail <= 0) { | |
2481 | ret = 0; | |
2482 | goto __end; | |
2483 | } | |
2484 | if (frames > (snd_pcm_uframes_t)avail) | |
2485 | frames = avail; | |
1da177e4 LT |
2486 | appl_ptr = runtime->control->appl_ptr + frames; |
2487 | if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary) | |
2488 | appl_ptr -= runtime->boundary; | |
2489 | runtime->control->appl_ptr = appl_ptr; | |
1da177e4 LT |
2490 | ret = frames; |
2491 | __end: | |
2492 | snd_pcm_stream_unlock_irq(substream); | |
2493 | return ret; | |
2494 | } | |
2495 | ||
877211f5 TI |
2496 | static snd_pcm_sframes_t snd_pcm_capture_forward(struct snd_pcm_substream *substream, |
2497 | snd_pcm_uframes_t frames) | |
1da177e4 | 2498 | { |
877211f5 | 2499 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
2500 | snd_pcm_sframes_t appl_ptr; |
2501 | snd_pcm_sframes_t ret; | |
2502 | snd_pcm_sframes_t avail; | |
2503 | ||
2504 | if (frames == 0) | |
2505 | return 0; | |
2506 | ||
2507 | snd_pcm_stream_lock_irq(substream); | |
2508 | switch (runtime->status->state) { | |
2509 | case SNDRV_PCM_STATE_PREPARED: | |
2510 | case SNDRV_PCM_STATE_DRAINING: | |
2511 | case SNDRV_PCM_STATE_PAUSED: | |
2512 | break; | |
2513 | case SNDRV_PCM_STATE_RUNNING: | |
2514 | if (snd_pcm_update_hw_ptr(substream) >= 0) | |
2515 | break; | |
2516 | /* Fall through */ | |
2517 | case SNDRV_PCM_STATE_XRUN: | |
2518 | ret = -EPIPE; | |
2519 | goto __end; | |
51840409 LR |
2520 | case SNDRV_PCM_STATE_SUSPENDED: |
2521 | ret = -ESTRPIPE; | |
2522 | goto __end; | |
1da177e4 LT |
2523 | default: |
2524 | ret = -EBADFD; | |
2525 | goto __end; | |
2526 | } | |
2527 | ||
2528 | avail = snd_pcm_capture_avail(runtime); | |
2529 | if (avail <= 0) { | |
2530 | ret = 0; | |
2531 | goto __end; | |
2532 | } | |
2533 | if (frames > (snd_pcm_uframes_t)avail) | |
2534 | frames = avail; | |
1da177e4 LT |
2535 | appl_ptr = runtime->control->appl_ptr + frames; |
2536 | if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary) | |
2537 | appl_ptr -= runtime->boundary; | |
2538 | runtime->control->appl_ptr = appl_ptr; | |
1da177e4 LT |
2539 | ret = frames; |
2540 | __end: | |
2541 | snd_pcm_stream_unlock_irq(substream); | |
2542 | return ret; | |
2543 | } | |
2544 | ||
877211f5 | 2545 | static int snd_pcm_hwsync(struct snd_pcm_substream *substream) |
1da177e4 | 2546 | { |
877211f5 | 2547 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
2548 | int err; |
2549 | ||
2550 | snd_pcm_stream_lock_irq(substream); | |
2551 | switch (runtime->status->state) { | |
2552 | case SNDRV_PCM_STATE_DRAINING: | |
2553 | if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) | |
2554 | goto __badfd; | |
1f96153b | 2555 | /* Fall through */ |
1da177e4 LT |
2556 | case SNDRV_PCM_STATE_RUNNING: |
2557 | if ((err = snd_pcm_update_hw_ptr(substream)) < 0) | |
2558 | break; | |
2559 | /* Fall through */ | |
2560 | case SNDRV_PCM_STATE_PREPARED: | |
2561 | case SNDRV_PCM_STATE_SUSPENDED: | |
2562 | err = 0; | |
2563 | break; | |
2564 | case SNDRV_PCM_STATE_XRUN: | |
2565 | err = -EPIPE; | |
2566 | break; | |
2567 | default: | |
2568 | __badfd: | |
2569 | err = -EBADFD; | |
2570 | break; | |
2571 | } | |
2572 | snd_pcm_stream_unlock_irq(substream); | |
2573 | return err; | |
2574 | } | |
2575 | ||
877211f5 TI |
2576 | static int snd_pcm_delay(struct snd_pcm_substream *substream, |
2577 | snd_pcm_sframes_t __user *res) | |
1da177e4 | 2578 | { |
877211f5 | 2579 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
2580 | int err; |
2581 | snd_pcm_sframes_t n = 0; | |
2582 | ||
2583 | snd_pcm_stream_lock_irq(substream); | |
2584 | switch (runtime->status->state) { | |
2585 | case SNDRV_PCM_STATE_DRAINING: | |
2586 | if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) | |
2587 | goto __badfd; | |
1f96153b | 2588 | /* Fall through */ |
1da177e4 LT |
2589 | case SNDRV_PCM_STATE_RUNNING: |
2590 | if ((err = snd_pcm_update_hw_ptr(substream)) < 0) | |
2591 | break; | |
2592 | /* Fall through */ | |
2593 | case SNDRV_PCM_STATE_PREPARED: | |
2594 | case SNDRV_PCM_STATE_SUSPENDED: | |
2595 | err = 0; | |
2596 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) | |
2597 | n = snd_pcm_playback_hw_avail(runtime); | |
2598 | else | |
2599 | n = snd_pcm_capture_avail(runtime); | |
4bbe1ddf | 2600 | n += runtime->delay; |
1da177e4 LT |
2601 | break; |
2602 | case SNDRV_PCM_STATE_XRUN: | |
2603 | err = -EPIPE; | |
2604 | break; | |
2605 | default: | |
2606 | __badfd: | |
2607 | err = -EBADFD; | |
2608 | break; | |
2609 | } | |
2610 | snd_pcm_stream_unlock_irq(substream); | |
2611 | if (!err) | |
2612 | if (put_user(n, res)) | |
2613 | err = -EFAULT; | |
2614 | return err; | |
2615 | } | |
2616 | ||
877211f5 TI |
2617 | static int snd_pcm_sync_ptr(struct snd_pcm_substream *substream, |
2618 | struct snd_pcm_sync_ptr __user *_sync_ptr) | |
1da177e4 | 2619 | { |
877211f5 TI |
2620 | struct snd_pcm_runtime *runtime = substream->runtime; |
2621 | struct snd_pcm_sync_ptr sync_ptr; | |
2622 | volatile struct snd_pcm_mmap_status *status; | |
2623 | volatile struct snd_pcm_mmap_control *control; | |
1da177e4 LT |
2624 | int err; |
2625 | ||
2626 | memset(&sync_ptr, 0, sizeof(sync_ptr)); | |
2627 | if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags))) | |
2628 | return -EFAULT; | |
877211f5 | 2629 | if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct snd_pcm_mmap_control))) |
1da177e4 LT |
2630 | return -EFAULT; |
2631 | status = runtime->status; | |
2632 | control = runtime->control; | |
2633 | if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) { | |
2634 | err = snd_pcm_hwsync(substream); | |
2635 | if (err < 0) | |
2636 | return err; | |
2637 | } | |
2638 | snd_pcm_stream_lock_irq(substream); | |
2639 | if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL)) | |
2640 | control->appl_ptr = sync_ptr.c.control.appl_ptr; | |
2641 | else | |
2642 | sync_ptr.c.control.appl_ptr = control->appl_ptr; | |
2643 | if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN)) | |
2644 | control->avail_min = sync_ptr.c.control.avail_min; | |
2645 | else | |
2646 | sync_ptr.c.control.avail_min = control->avail_min; | |
2647 | sync_ptr.s.status.state = status->state; | |
2648 | sync_ptr.s.status.hw_ptr = status->hw_ptr; | |
2649 | sync_ptr.s.status.tstamp = status->tstamp; | |
2650 | sync_ptr.s.status.suspended_state = status->suspended_state; | |
2651 | snd_pcm_stream_unlock_irq(substream); | |
2652 | if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr))) | |
2653 | return -EFAULT; | |
2654 | return 0; | |
2655 | } | |
b751eef1 JK |
2656 | |
2657 | static int snd_pcm_tstamp(struct snd_pcm_substream *substream, int __user *_arg) | |
2658 | { | |
2659 | struct snd_pcm_runtime *runtime = substream->runtime; | |
2660 | int arg; | |
2661 | ||
2662 | if (get_user(arg, _arg)) | |
2663 | return -EFAULT; | |
2664 | if (arg < 0 || arg > SNDRV_PCM_TSTAMP_TYPE_LAST) | |
2665 | return -EINVAL; | |
2408c219 | 2666 | runtime->tstamp_type = arg; |
b751eef1 JK |
2667 | return 0; |
2668 | } | |
1da177e4 | 2669 | |
0df63e44 TI |
2670 | static int snd_pcm_common_ioctl1(struct file *file, |
2671 | struct snd_pcm_substream *substream, | |
1da177e4 LT |
2672 | unsigned int cmd, void __user *arg) |
2673 | { | |
1da177e4 LT |
2674 | switch (cmd) { |
2675 | case SNDRV_PCM_IOCTL_PVERSION: | |
2676 | return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0; | |
2677 | case SNDRV_PCM_IOCTL_INFO: | |
2678 | return snd_pcm_info_user(substream, arg); | |
28e9e473 JK |
2679 | case SNDRV_PCM_IOCTL_TSTAMP: /* just for compatibility */ |
2680 | return 0; | |
b751eef1 JK |
2681 | case SNDRV_PCM_IOCTL_TTSTAMP: |
2682 | return snd_pcm_tstamp(substream, arg); | |
1da177e4 LT |
2683 | case SNDRV_PCM_IOCTL_HW_REFINE: |
2684 | return snd_pcm_hw_refine_user(substream, arg); | |
2685 | case SNDRV_PCM_IOCTL_HW_PARAMS: | |
2686 | return snd_pcm_hw_params_user(substream, arg); | |
2687 | case SNDRV_PCM_IOCTL_HW_FREE: | |
2688 | return snd_pcm_hw_free(substream); | |
2689 | case SNDRV_PCM_IOCTL_SW_PARAMS: | |
2690 | return snd_pcm_sw_params_user(substream, arg); | |
2691 | case SNDRV_PCM_IOCTL_STATUS: | |
2692 | return snd_pcm_status_user(substream, arg); | |
2693 | case SNDRV_PCM_IOCTL_CHANNEL_INFO: | |
2694 | return snd_pcm_channel_info_user(substream, arg); | |
2695 | case SNDRV_PCM_IOCTL_PREPARE: | |
0df63e44 | 2696 | return snd_pcm_prepare(substream, file); |
1da177e4 LT |
2697 | case SNDRV_PCM_IOCTL_RESET: |
2698 | return snd_pcm_reset(substream); | |
2699 | case SNDRV_PCM_IOCTL_START: | |
2700 | return snd_pcm_action_lock_irq(&snd_pcm_action_start, substream, SNDRV_PCM_STATE_RUNNING); | |
2701 | case SNDRV_PCM_IOCTL_LINK: | |
2702 | return snd_pcm_link(substream, (int)(unsigned long) arg); | |
2703 | case SNDRV_PCM_IOCTL_UNLINK: | |
2704 | return snd_pcm_unlink(substream); | |
2705 | case SNDRV_PCM_IOCTL_RESUME: | |
2706 | return snd_pcm_resume(substream); | |
2707 | case SNDRV_PCM_IOCTL_XRUN: | |
2708 | return snd_pcm_xrun(substream); | |
2709 | case SNDRV_PCM_IOCTL_HWSYNC: | |
2710 | return snd_pcm_hwsync(substream); | |
2711 | case SNDRV_PCM_IOCTL_DELAY: | |
2712 | return snd_pcm_delay(substream, arg); | |
2713 | case SNDRV_PCM_IOCTL_SYNC_PTR: | |
2714 | return snd_pcm_sync_ptr(substream, arg); | |
59d48582 | 2715 | #ifdef CONFIG_SND_SUPPORT_OLD_API |
1da177e4 LT |
2716 | case SNDRV_PCM_IOCTL_HW_REFINE_OLD: |
2717 | return snd_pcm_hw_refine_old_user(substream, arg); | |
2718 | case SNDRV_PCM_IOCTL_HW_PARAMS_OLD: | |
2719 | return snd_pcm_hw_params_old_user(substream, arg); | |
59d48582 | 2720 | #endif |
1da177e4 | 2721 | case SNDRV_PCM_IOCTL_DRAIN: |
4cdc115f | 2722 | return snd_pcm_drain(substream, file); |
1da177e4 LT |
2723 | case SNDRV_PCM_IOCTL_DROP: |
2724 | return snd_pcm_drop(substream); | |
e661d0dd TI |
2725 | case SNDRV_PCM_IOCTL_PAUSE: |
2726 | { | |
2727 | int res; | |
2728 | snd_pcm_stream_lock_irq(substream); | |
2729 | res = snd_pcm_pause(substream, (int)(unsigned long)arg); | |
2730 | snd_pcm_stream_unlock_irq(substream); | |
2731 | return res; | |
2732 | } | |
1da177e4 | 2733 | } |
09e56df8 | 2734 | pcm_dbg(substream->pcm, "unknown ioctl = 0x%x\n", cmd); |
1da177e4 LT |
2735 | return -ENOTTY; |
2736 | } | |
2737 | ||
0df63e44 TI |
2738 | static int snd_pcm_playback_ioctl1(struct file *file, |
2739 | struct snd_pcm_substream *substream, | |
1da177e4 LT |
2740 | unsigned int cmd, void __user *arg) |
2741 | { | |
7eaa943c TI |
2742 | if (snd_BUG_ON(!substream)) |
2743 | return -ENXIO; | |
2744 | if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_PLAYBACK)) | |
2745 | return -EINVAL; | |
1da177e4 LT |
2746 | switch (cmd) { |
2747 | case SNDRV_PCM_IOCTL_WRITEI_FRAMES: | |
2748 | { | |
877211f5 TI |
2749 | struct snd_xferi xferi; |
2750 | struct snd_xferi __user *_xferi = arg; | |
2751 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1da177e4 LT |
2752 | snd_pcm_sframes_t result; |
2753 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) | |
2754 | return -EBADFD; | |
2755 | if (put_user(0, &_xferi->result)) | |
2756 | return -EFAULT; | |
2757 | if (copy_from_user(&xferi, _xferi, sizeof(xferi))) | |
2758 | return -EFAULT; | |
2759 | result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames); | |
2760 | __put_user(result, &_xferi->result); | |
2761 | return result < 0 ? result : 0; | |
2762 | } | |
2763 | case SNDRV_PCM_IOCTL_WRITEN_FRAMES: | |
2764 | { | |
877211f5 TI |
2765 | struct snd_xfern xfern; |
2766 | struct snd_xfern __user *_xfern = arg; | |
2767 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1da177e4 LT |
2768 | void __user **bufs; |
2769 | snd_pcm_sframes_t result; | |
2770 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) | |
2771 | return -EBADFD; | |
2772 | if (runtime->channels > 128) | |
2773 | return -EINVAL; | |
2774 | if (put_user(0, &_xfern->result)) | |
2775 | return -EFAULT; | |
2776 | if (copy_from_user(&xfern, _xfern, sizeof(xfern))) | |
2777 | return -EFAULT; | |
ef44a1ec LZ |
2778 | |
2779 | bufs = memdup_user(xfern.bufs, | |
2780 | sizeof(void *) * runtime->channels); | |
2781 | if (IS_ERR(bufs)) | |
2782 | return PTR_ERR(bufs); | |
1da177e4 LT |
2783 | result = snd_pcm_lib_writev(substream, bufs, xfern.frames); |
2784 | kfree(bufs); | |
2785 | __put_user(result, &_xfern->result); | |
2786 | return result < 0 ? result : 0; | |
2787 | } | |
2788 | case SNDRV_PCM_IOCTL_REWIND: | |
2789 | { | |
2790 | snd_pcm_uframes_t frames; | |
2791 | snd_pcm_uframes_t __user *_frames = arg; | |
2792 | snd_pcm_sframes_t result; | |
2793 | if (get_user(frames, _frames)) | |
2794 | return -EFAULT; | |
2795 | if (put_user(0, _frames)) | |
2796 | return -EFAULT; | |
2797 | result = snd_pcm_playback_rewind(substream, frames); | |
2798 | __put_user(result, _frames); | |
2799 | return result < 0 ? result : 0; | |
2800 | } | |
2801 | case SNDRV_PCM_IOCTL_FORWARD: | |
2802 | { | |
2803 | snd_pcm_uframes_t frames; | |
2804 | snd_pcm_uframes_t __user *_frames = arg; | |
2805 | snd_pcm_sframes_t result; | |
2806 | if (get_user(frames, _frames)) | |
2807 | return -EFAULT; | |
2808 | if (put_user(0, _frames)) | |
2809 | return -EFAULT; | |
2810 | result = snd_pcm_playback_forward(substream, frames); | |
2811 | __put_user(result, _frames); | |
2812 | return result < 0 ? result : 0; | |
2813 | } | |
1da177e4 | 2814 | } |
0df63e44 | 2815 | return snd_pcm_common_ioctl1(file, substream, cmd, arg); |
1da177e4 LT |
2816 | } |
2817 | ||
0df63e44 TI |
2818 | static int snd_pcm_capture_ioctl1(struct file *file, |
2819 | struct snd_pcm_substream *substream, | |
1da177e4 LT |
2820 | unsigned int cmd, void __user *arg) |
2821 | { | |
7eaa943c TI |
2822 | if (snd_BUG_ON(!substream)) |
2823 | return -ENXIO; | |
2824 | if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_CAPTURE)) | |
2825 | return -EINVAL; | |
1da177e4 LT |
2826 | switch (cmd) { |
2827 | case SNDRV_PCM_IOCTL_READI_FRAMES: | |
2828 | { | |
877211f5 TI |
2829 | struct snd_xferi xferi; |
2830 | struct snd_xferi __user *_xferi = arg; | |
2831 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1da177e4 LT |
2832 | snd_pcm_sframes_t result; |
2833 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) | |
2834 | return -EBADFD; | |
2835 | if (put_user(0, &_xferi->result)) | |
2836 | return -EFAULT; | |
2837 | if (copy_from_user(&xferi, _xferi, sizeof(xferi))) | |
2838 | return -EFAULT; | |
2839 | result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames); | |
2840 | __put_user(result, &_xferi->result); | |
2841 | return result < 0 ? result : 0; | |
2842 | } | |
2843 | case SNDRV_PCM_IOCTL_READN_FRAMES: | |
2844 | { | |
877211f5 TI |
2845 | struct snd_xfern xfern; |
2846 | struct snd_xfern __user *_xfern = arg; | |
2847 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1da177e4 LT |
2848 | void *bufs; |
2849 | snd_pcm_sframes_t result; | |
2850 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) | |
2851 | return -EBADFD; | |
2852 | if (runtime->channels > 128) | |
2853 | return -EINVAL; | |
2854 | if (put_user(0, &_xfern->result)) | |
2855 | return -EFAULT; | |
2856 | if (copy_from_user(&xfern, _xfern, sizeof(xfern))) | |
2857 | return -EFAULT; | |
ef44a1ec LZ |
2858 | |
2859 | bufs = memdup_user(xfern.bufs, | |
2860 | sizeof(void *) * runtime->channels); | |
2861 | if (IS_ERR(bufs)) | |
2862 | return PTR_ERR(bufs); | |
1da177e4 LT |
2863 | result = snd_pcm_lib_readv(substream, bufs, xfern.frames); |
2864 | kfree(bufs); | |
2865 | __put_user(result, &_xfern->result); | |
2866 | return result < 0 ? result : 0; | |
2867 | } | |
2868 | case SNDRV_PCM_IOCTL_REWIND: | |
2869 | { | |
2870 | snd_pcm_uframes_t frames; | |
2871 | snd_pcm_uframes_t __user *_frames = arg; | |
2872 | snd_pcm_sframes_t result; | |
2873 | if (get_user(frames, _frames)) | |
2874 | return -EFAULT; | |
2875 | if (put_user(0, _frames)) | |
2876 | return -EFAULT; | |
2877 | result = snd_pcm_capture_rewind(substream, frames); | |
2878 | __put_user(result, _frames); | |
2879 | return result < 0 ? result : 0; | |
2880 | } | |
2881 | case SNDRV_PCM_IOCTL_FORWARD: | |
2882 | { | |
2883 | snd_pcm_uframes_t frames; | |
2884 | snd_pcm_uframes_t __user *_frames = arg; | |
2885 | snd_pcm_sframes_t result; | |
2886 | if (get_user(frames, _frames)) | |
2887 | return -EFAULT; | |
2888 | if (put_user(0, _frames)) | |
2889 | return -EFAULT; | |
2890 | result = snd_pcm_capture_forward(substream, frames); | |
2891 | __put_user(result, _frames); | |
2892 | return result < 0 ? result : 0; | |
2893 | } | |
2894 | } | |
0df63e44 | 2895 | return snd_pcm_common_ioctl1(file, substream, cmd, arg); |
1da177e4 LT |
2896 | } |
2897 | ||
877211f5 TI |
2898 | static long snd_pcm_playback_ioctl(struct file *file, unsigned int cmd, |
2899 | unsigned long arg) | |
1da177e4 | 2900 | { |
877211f5 | 2901 | struct snd_pcm_file *pcm_file; |
1da177e4 LT |
2902 | |
2903 | pcm_file = file->private_data; | |
2904 | ||
2905 | if (((cmd >> 8) & 0xff) != 'A') | |
2906 | return -ENOTTY; | |
2907 | ||
0df63e44 TI |
2908 | return snd_pcm_playback_ioctl1(file, pcm_file->substream, cmd, |
2909 | (void __user *)arg); | |
1da177e4 LT |
2910 | } |
2911 | ||
877211f5 TI |
2912 | static long snd_pcm_capture_ioctl(struct file *file, unsigned int cmd, |
2913 | unsigned long arg) | |
1da177e4 | 2914 | { |
877211f5 | 2915 | struct snd_pcm_file *pcm_file; |
1da177e4 LT |
2916 | |
2917 | pcm_file = file->private_data; | |
2918 | ||
2919 | if (((cmd >> 8) & 0xff) != 'A') | |
2920 | return -ENOTTY; | |
2921 | ||
0df63e44 TI |
2922 | return snd_pcm_capture_ioctl1(file, pcm_file->substream, cmd, |
2923 | (void __user *)arg); | |
1da177e4 LT |
2924 | } |
2925 | ||
bf1bbb5a TI |
2926 | int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream, |
2927 | unsigned int cmd, void *arg) | |
1da177e4 LT |
2928 | { |
2929 | mm_segment_t fs; | |
2930 | int result; | |
2931 | ||
2932 | fs = snd_enter_user(); | |
1da177e4 LT |
2933 | switch (substream->stream) { |
2934 | case SNDRV_PCM_STREAM_PLAYBACK: | |
0df63e44 TI |
2935 | result = snd_pcm_playback_ioctl1(NULL, substream, cmd, |
2936 | (void __user *)arg); | |
bf1bbb5a | 2937 | break; |
1da177e4 | 2938 | case SNDRV_PCM_STREAM_CAPTURE: |
0df63e44 TI |
2939 | result = snd_pcm_capture_ioctl1(NULL, substream, cmd, |
2940 | (void __user *)arg); | |
bf1bbb5a | 2941 | break; |
1da177e4 | 2942 | default: |
bf1bbb5a TI |
2943 | result = -EINVAL; |
2944 | break; | |
1da177e4 | 2945 | } |
bf1bbb5a TI |
2946 | snd_leave_user(fs); |
2947 | return result; | |
1da177e4 LT |
2948 | } |
2949 | ||
e88e8ae6 TI |
2950 | EXPORT_SYMBOL(snd_pcm_kernel_ioctl); |
2951 | ||
877211f5 TI |
2952 | static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count, |
2953 | loff_t * offset) | |
1da177e4 | 2954 | { |
877211f5 TI |
2955 | struct snd_pcm_file *pcm_file; |
2956 | struct snd_pcm_substream *substream; | |
2957 | struct snd_pcm_runtime *runtime; | |
1da177e4 LT |
2958 | snd_pcm_sframes_t result; |
2959 | ||
2960 | pcm_file = file->private_data; | |
2961 | substream = pcm_file->substream; | |
7eaa943c TI |
2962 | if (PCM_RUNTIME_CHECK(substream)) |
2963 | return -ENXIO; | |
1da177e4 LT |
2964 | runtime = substream->runtime; |
2965 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) | |
2966 | return -EBADFD; | |
2967 | if (!frame_aligned(runtime, count)) | |
2968 | return -EINVAL; | |
2969 | count = bytes_to_frames(runtime, count); | |
2970 | result = snd_pcm_lib_read(substream, buf, count); | |
2971 | if (result > 0) | |
2972 | result = frames_to_bytes(runtime, result); | |
2973 | return result; | |
2974 | } | |
2975 | ||
877211f5 TI |
2976 | static ssize_t snd_pcm_write(struct file *file, const char __user *buf, |
2977 | size_t count, loff_t * offset) | |
1da177e4 | 2978 | { |
877211f5 TI |
2979 | struct snd_pcm_file *pcm_file; |
2980 | struct snd_pcm_substream *substream; | |
2981 | struct snd_pcm_runtime *runtime; | |
1da177e4 LT |
2982 | snd_pcm_sframes_t result; |
2983 | ||
2984 | pcm_file = file->private_data; | |
2985 | substream = pcm_file->substream; | |
7eaa943c TI |
2986 | if (PCM_RUNTIME_CHECK(substream)) |
2987 | return -ENXIO; | |
1da177e4 | 2988 | runtime = substream->runtime; |
7eaa943c TI |
2989 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) |
2990 | return -EBADFD; | |
2991 | if (!frame_aligned(runtime, count)) | |
2992 | return -EINVAL; | |
1da177e4 LT |
2993 | count = bytes_to_frames(runtime, count); |
2994 | result = snd_pcm_lib_write(substream, buf, count); | |
2995 | if (result > 0) | |
2996 | result = frames_to_bytes(runtime, result); | |
1da177e4 LT |
2997 | return result; |
2998 | } | |
2999 | ||
ee0b3e67 BP |
3000 | static ssize_t snd_pcm_aio_read(struct kiocb *iocb, const struct iovec *iov, |
3001 | unsigned long nr_segs, loff_t pos) | |
1da177e4 LT |
3002 | |
3003 | { | |
877211f5 TI |
3004 | struct snd_pcm_file *pcm_file; |
3005 | struct snd_pcm_substream *substream; | |
3006 | struct snd_pcm_runtime *runtime; | |
1da177e4 LT |
3007 | snd_pcm_sframes_t result; |
3008 | unsigned long i; | |
3009 | void __user **bufs; | |
3010 | snd_pcm_uframes_t frames; | |
3011 | ||
ee0b3e67 | 3012 | pcm_file = iocb->ki_filp->private_data; |
1da177e4 | 3013 | substream = pcm_file->substream; |
7eaa943c TI |
3014 | if (PCM_RUNTIME_CHECK(substream)) |
3015 | return -ENXIO; | |
1da177e4 LT |
3016 | runtime = substream->runtime; |
3017 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) | |
3018 | return -EBADFD; | |
ee0b3e67 | 3019 | if (nr_segs > 1024 || nr_segs != runtime->channels) |
1da177e4 | 3020 | return -EINVAL; |
ee0b3e67 | 3021 | if (!frame_aligned(runtime, iov->iov_len)) |
1da177e4 | 3022 | return -EINVAL; |
ee0b3e67 BP |
3023 | frames = bytes_to_samples(runtime, iov->iov_len); |
3024 | bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL); | |
1da177e4 LT |
3025 | if (bufs == NULL) |
3026 | return -ENOMEM; | |
ee0b3e67 BP |
3027 | for (i = 0; i < nr_segs; ++i) |
3028 | bufs[i] = iov[i].iov_base; | |
1da177e4 LT |
3029 | result = snd_pcm_lib_readv(substream, bufs, frames); |
3030 | if (result > 0) | |
3031 | result = frames_to_bytes(runtime, result); | |
3032 | kfree(bufs); | |
3033 | return result; | |
3034 | } | |
3035 | ||
ee0b3e67 BP |
3036 | static ssize_t snd_pcm_aio_write(struct kiocb *iocb, const struct iovec *iov, |
3037 | unsigned long nr_segs, loff_t pos) | |
1da177e4 | 3038 | { |
877211f5 TI |
3039 | struct snd_pcm_file *pcm_file; |
3040 | struct snd_pcm_substream *substream; | |
3041 | struct snd_pcm_runtime *runtime; | |
1da177e4 LT |
3042 | snd_pcm_sframes_t result; |
3043 | unsigned long i; | |
3044 | void __user **bufs; | |
3045 | snd_pcm_uframes_t frames; | |
3046 | ||
ee0b3e67 | 3047 | pcm_file = iocb->ki_filp->private_data; |
1da177e4 | 3048 | substream = pcm_file->substream; |
7eaa943c TI |
3049 | if (PCM_RUNTIME_CHECK(substream)) |
3050 | return -ENXIO; | |
1da177e4 | 3051 | runtime = substream->runtime; |
7eaa943c TI |
3052 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) |
3053 | return -EBADFD; | |
ee0b3e67 | 3054 | if (nr_segs > 128 || nr_segs != runtime->channels || |
7eaa943c TI |
3055 | !frame_aligned(runtime, iov->iov_len)) |
3056 | return -EINVAL; | |
ee0b3e67 BP |
3057 | frames = bytes_to_samples(runtime, iov->iov_len); |
3058 | bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL); | |
1da177e4 LT |
3059 | if (bufs == NULL) |
3060 | return -ENOMEM; | |
ee0b3e67 BP |
3061 | for (i = 0; i < nr_segs; ++i) |
3062 | bufs[i] = iov[i].iov_base; | |
1da177e4 LT |
3063 | result = snd_pcm_lib_writev(substream, bufs, frames); |
3064 | if (result > 0) | |
3065 | result = frames_to_bytes(runtime, result); | |
3066 | kfree(bufs); | |
1da177e4 LT |
3067 | return result; |
3068 | } | |
3069 | ||
3070 | static unsigned int snd_pcm_playback_poll(struct file *file, poll_table * wait) | |
3071 | { | |
877211f5 TI |
3072 | struct snd_pcm_file *pcm_file; |
3073 | struct snd_pcm_substream *substream; | |
3074 | struct snd_pcm_runtime *runtime; | |
1da177e4 LT |
3075 | unsigned int mask; |
3076 | snd_pcm_uframes_t avail; | |
3077 | ||
3078 | pcm_file = file->private_data; | |
3079 | ||
3080 | substream = pcm_file->substream; | |
7eaa943c TI |
3081 | if (PCM_RUNTIME_CHECK(substream)) |
3082 | return -ENXIO; | |
1da177e4 LT |
3083 | runtime = substream->runtime; |
3084 | ||
3085 | poll_wait(file, &runtime->sleep, wait); | |
3086 | ||
3087 | snd_pcm_stream_lock_irq(substream); | |
3088 | avail = snd_pcm_playback_avail(runtime); | |
3089 | switch (runtime->status->state) { | |
3090 | case SNDRV_PCM_STATE_RUNNING: | |
3091 | case SNDRV_PCM_STATE_PREPARED: | |
3092 | case SNDRV_PCM_STATE_PAUSED: | |
3093 | if (avail >= runtime->control->avail_min) { | |
3094 | mask = POLLOUT | POLLWRNORM; | |
3095 | break; | |
3096 | } | |
3097 | /* Fall through */ | |
3098 | case SNDRV_PCM_STATE_DRAINING: | |
3099 | mask = 0; | |
3100 | break; | |
3101 | default: | |
3102 | mask = POLLOUT | POLLWRNORM | POLLERR; | |
3103 | break; | |
3104 | } | |
3105 | snd_pcm_stream_unlock_irq(substream); | |
3106 | return mask; | |
3107 | } | |
3108 | ||
3109 | static unsigned int snd_pcm_capture_poll(struct file *file, poll_table * wait) | |
3110 | { | |
877211f5 TI |
3111 | struct snd_pcm_file *pcm_file; |
3112 | struct snd_pcm_substream *substream; | |
3113 | struct snd_pcm_runtime *runtime; | |
1da177e4 LT |
3114 | unsigned int mask; |
3115 | snd_pcm_uframes_t avail; | |
3116 | ||
3117 | pcm_file = file->private_data; | |
3118 | ||
3119 | substream = pcm_file->substream; | |
7eaa943c TI |
3120 | if (PCM_RUNTIME_CHECK(substream)) |
3121 | return -ENXIO; | |
1da177e4 LT |
3122 | runtime = substream->runtime; |
3123 | ||
3124 | poll_wait(file, &runtime->sleep, wait); | |
3125 | ||
3126 | snd_pcm_stream_lock_irq(substream); | |
3127 | avail = snd_pcm_capture_avail(runtime); | |
3128 | switch (runtime->status->state) { | |
3129 | case SNDRV_PCM_STATE_RUNNING: | |
3130 | case SNDRV_PCM_STATE_PREPARED: | |
3131 | case SNDRV_PCM_STATE_PAUSED: | |
3132 | if (avail >= runtime->control->avail_min) { | |
3133 | mask = POLLIN | POLLRDNORM; | |
3134 | break; | |
3135 | } | |
3136 | mask = 0; | |
3137 | break; | |
3138 | case SNDRV_PCM_STATE_DRAINING: | |
3139 | if (avail > 0) { | |
3140 | mask = POLLIN | POLLRDNORM; | |
3141 | break; | |
3142 | } | |
3143 | /* Fall through */ | |
3144 | default: | |
3145 | mask = POLLIN | POLLRDNORM | POLLERR; | |
3146 | break; | |
3147 | } | |
3148 | snd_pcm_stream_unlock_irq(substream); | |
3149 | return mask; | |
3150 | } | |
3151 | ||
3152 | /* | |
3153 | * mmap support | |
3154 | */ | |
3155 | ||
3156 | /* | |
3157 | * Only on coherent architectures, we can mmap the status and the control records | |
3158 | * for effcient data transfer. On others, we have to use HWSYNC ioctl... | |
3159 | */ | |
3160 | #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA) | |
3161 | /* | |
3162 | * mmap status record | |
3163 | */ | |
3ad5afcd NP |
3164 | static int snd_pcm_mmap_status_fault(struct vm_area_struct *area, |
3165 | struct vm_fault *vmf) | |
1da177e4 | 3166 | { |
877211f5 TI |
3167 | struct snd_pcm_substream *substream = area->vm_private_data; |
3168 | struct snd_pcm_runtime *runtime; | |
1da177e4 LT |
3169 | |
3170 | if (substream == NULL) | |
3ad5afcd | 3171 | return VM_FAULT_SIGBUS; |
1da177e4 | 3172 | runtime = substream->runtime; |
3ad5afcd NP |
3173 | vmf->page = virt_to_page(runtime->status); |
3174 | get_page(vmf->page); | |
3175 | return 0; | |
1da177e4 LT |
3176 | } |
3177 | ||
f0f37e2f | 3178 | static const struct vm_operations_struct snd_pcm_vm_ops_status = |
1da177e4 | 3179 | { |
3ad5afcd | 3180 | .fault = snd_pcm_mmap_status_fault, |
1da177e4 LT |
3181 | }; |
3182 | ||
877211f5 | 3183 | static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file, |
1da177e4 LT |
3184 | struct vm_area_struct *area) |
3185 | { | |
1da177e4 LT |
3186 | long size; |
3187 | if (!(area->vm_flags & VM_READ)) | |
3188 | return -EINVAL; | |
1da177e4 | 3189 | size = area->vm_end - area->vm_start; |
877211f5 | 3190 | if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status))) |
1da177e4 LT |
3191 | return -EINVAL; |
3192 | area->vm_ops = &snd_pcm_vm_ops_status; | |
3193 | area->vm_private_data = substream; | |
314e51b9 | 3194 | area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP; |
1da177e4 LT |
3195 | return 0; |
3196 | } | |
3197 | ||
3198 | /* | |
3199 | * mmap control record | |
3200 | */ | |
3ad5afcd NP |
3201 | static int snd_pcm_mmap_control_fault(struct vm_area_struct *area, |
3202 | struct vm_fault *vmf) | |
1da177e4 | 3203 | { |
877211f5 TI |
3204 | struct snd_pcm_substream *substream = area->vm_private_data; |
3205 | struct snd_pcm_runtime *runtime; | |
1da177e4 LT |
3206 | |
3207 | if (substream == NULL) | |
3ad5afcd | 3208 | return VM_FAULT_SIGBUS; |
1da177e4 | 3209 | runtime = substream->runtime; |
3ad5afcd NP |
3210 | vmf->page = virt_to_page(runtime->control); |
3211 | get_page(vmf->page); | |
3212 | return 0; | |
1da177e4 LT |
3213 | } |
3214 | ||
f0f37e2f | 3215 | static const struct vm_operations_struct snd_pcm_vm_ops_control = |
1da177e4 | 3216 | { |
3ad5afcd | 3217 | .fault = snd_pcm_mmap_control_fault, |
1da177e4 LT |
3218 | }; |
3219 | ||
877211f5 | 3220 | static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file, |
1da177e4 LT |
3221 | struct vm_area_struct *area) |
3222 | { | |
1da177e4 LT |
3223 | long size; |
3224 | if (!(area->vm_flags & VM_READ)) | |
3225 | return -EINVAL; | |
1da177e4 | 3226 | size = area->vm_end - area->vm_start; |
877211f5 | 3227 | if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control))) |
1da177e4 LT |
3228 | return -EINVAL; |
3229 | area->vm_ops = &snd_pcm_vm_ops_control; | |
3230 | area->vm_private_data = substream; | |
314e51b9 | 3231 | area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP; |
1da177e4 LT |
3232 | return 0; |
3233 | } | |
3234 | #else /* ! coherent mmap */ | |
3235 | /* | |
3236 | * don't support mmap for status and control records. | |
3237 | */ | |
877211f5 | 3238 | static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file, |
1da177e4 LT |
3239 | struct vm_area_struct *area) |
3240 | { | |
3241 | return -ENXIO; | |
3242 | } | |
877211f5 | 3243 | static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file, |
1da177e4 LT |
3244 | struct vm_area_struct *area) |
3245 | { | |
3246 | return -ENXIO; | |
3247 | } | |
3248 | #endif /* coherent mmap */ | |
3249 | ||
9eb4a067 TI |
3250 | static inline struct page * |
3251 | snd_pcm_default_page_ops(struct snd_pcm_substream *substream, unsigned long ofs) | |
3252 | { | |
3253 | void *vaddr = substream->runtime->dma_area + ofs; | |
66b6cfac TI |
3254 | #if defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT) |
3255 | if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV) | |
3256 | return virt_to_page(CAC_ADDR(vaddr)); | |
6985c887 TI |
3257 | #endif |
3258 | #if defined(CONFIG_PPC32) && defined(CONFIG_NOT_COHERENT_CACHE) | |
3259 | if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV) { | |
3260 | dma_addr_t addr = substream->runtime->dma_addr + ofs; | |
3261 | addr -= get_dma_offset(substream->dma_buffer.dev.dev); | |
3262 | /* assume dma_handle set via pfn_to_phys() in | |
3263 | * mm/dma-noncoherent.c | |
3264 | */ | |
3265 | return pfn_to_page(addr >> PAGE_SHIFT); | |
3266 | } | |
66b6cfac | 3267 | #endif |
9eb4a067 TI |
3268 | return virt_to_page(vaddr); |
3269 | } | |
3270 | ||
1da177e4 | 3271 | /* |
3ad5afcd | 3272 | * fault callback for mmapping a RAM page |
1da177e4 | 3273 | */ |
3ad5afcd NP |
3274 | static int snd_pcm_mmap_data_fault(struct vm_area_struct *area, |
3275 | struct vm_fault *vmf) | |
1da177e4 | 3276 | { |
877211f5 TI |
3277 | struct snd_pcm_substream *substream = area->vm_private_data; |
3278 | struct snd_pcm_runtime *runtime; | |
1da177e4 LT |
3279 | unsigned long offset; |
3280 | struct page * page; | |
1da177e4 LT |
3281 | size_t dma_bytes; |
3282 | ||
3283 | if (substream == NULL) | |
3ad5afcd | 3284 | return VM_FAULT_SIGBUS; |
1da177e4 | 3285 | runtime = substream->runtime; |
3ad5afcd | 3286 | offset = vmf->pgoff << PAGE_SHIFT; |
1da177e4 LT |
3287 | dma_bytes = PAGE_ALIGN(runtime->dma_bytes); |
3288 | if (offset > dma_bytes - PAGE_SIZE) | |
3ad5afcd | 3289 | return VM_FAULT_SIGBUS; |
9eb4a067 | 3290 | if (substream->ops->page) |
1da177e4 | 3291 | page = substream->ops->page(substream, offset); |
9eb4a067 TI |
3292 | else |
3293 | page = snd_pcm_default_page_ops(substream, offset); | |
3294 | if (!page) | |
3295 | return VM_FAULT_SIGBUS; | |
b5810039 | 3296 | get_page(page); |
3ad5afcd NP |
3297 | vmf->page = page; |
3298 | return 0; | |
1da177e4 LT |
3299 | } |
3300 | ||
657b1989 TI |
3301 | static const struct vm_operations_struct snd_pcm_vm_ops_data = { |
3302 | .open = snd_pcm_mmap_data_open, | |
3303 | .close = snd_pcm_mmap_data_close, | |
3304 | }; | |
3305 | ||
3306 | static const struct vm_operations_struct snd_pcm_vm_ops_data_fault = { | |
1da177e4 LT |
3307 | .open = snd_pcm_mmap_data_open, |
3308 | .close = snd_pcm_mmap_data_close, | |
3ad5afcd | 3309 | .fault = snd_pcm_mmap_data_fault, |
1da177e4 LT |
3310 | }; |
3311 | ||
657b1989 TI |
3312 | #ifndef ARCH_HAS_DMA_MMAP_COHERENT |
3313 | /* This should be defined / handled globally! */ | |
3314 | #ifdef CONFIG_ARM | |
3315 | #define ARCH_HAS_DMA_MMAP_COHERENT | |
3316 | #endif | |
3317 | #endif | |
3318 | ||
1da177e4 LT |
3319 | /* |
3320 | * mmap the DMA buffer on RAM | |
3321 | */ | |
18a2b962 TI |
3322 | int snd_pcm_lib_default_mmap(struct snd_pcm_substream *substream, |
3323 | struct vm_area_struct *area) | |
1da177e4 | 3324 | { |
314e51b9 | 3325 | area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP; |
a5606f85 | 3326 | #ifdef CONFIG_GENERIC_ALLOCATOR |
05503214 NC |
3327 | if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV_IRAM) { |
3328 | area->vm_page_prot = pgprot_writecombine(area->vm_page_prot); | |
3329 | return remap_pfn_range(area, area->vm_start, | |
3330 | substream->dma_buffer.addr >> PAGE_SHIFT, | |
3331 | area->vm_end - area->vm_start, area->vm_page_prot); | |
3332 | } | |
a5606f85 | 3333 | #endif /* CONFIG_GENERIC_ALLOCATOR */ |
657b1989 TI |
3334 | #ifdef ARCH_HAS_DMA_MMAP_COHERENT |
3335 | if (!substream->ops->page && | |
3336 | substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV) | |
3337 | return dma_mmap_coherent(substream->dma_buffer.dev.dev, | |
3338 | area, | |
3339 | substream->runtime->dma_area, | |
3340 | substream->runtime->dma_addr, | |
3341 | area->vm_end - area->vm_start); | |
9fe17b5d TI |
3342 | #elif defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT) |
3343 | if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV && | |
3344 | !plat_device_is_coherent(substream->dma_buffer.dev.dev)) | |
3345 | area->vm_page_prot = pgprot_noncached(area->vm_page_prot); | |
657b1989 TI |
3346 | #endif /* ARCH_HAS_DMA_MMAP_COHERENT */ |
3347 | /* mmap with fault handler */ | |
3348 | area->vm_ops = &snd_pcm_vm_ops_data_fault; | |
1da177e4 LT |
3349 | return 0; |
3350 | } | |
18a2b962 | 3351 | EXPORT_SYMBOL_GPL(snd_pcm_lib_default_mmap); |
1da177e4 LT |
3352 | |
3353 | /* | |
3354 | * mmap the DMA buffer on I/O memory area | |
3355 | */ | |
3356 | #if SNDRV_PCM_INFO_MMAP_IOMEM | |
877211f5 TI |
3357 | int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream, |
3358 | struct vm_area_struct *area) | |
1da177e4 | 3359 | { |
0fe09a45 | 3360 | struct snd_pcm_runtime *runtime = substream->runtime;; |
1da177e4 | 3361 | |
1da177e4 | 3362 | area->vm_page_prot = pgprot_noncached(area->vm_page_prot); |
0fe09a45 | 3363 | return vm_iomap_memory(area, runtime->dma_addr, runtime->dma_bytes); |
1da177e4 | 3364 | } |
e88e8ae6 TI |
3365 | |
3366 | EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem); | |
1da177e4 LT |
3367 | #endif /* SNDRV_PCM_INFO_MMAP */ |
3368 | ||
3369 | /* | |
3370 | * mmap DMA buffer | |
3371 | */ | |
877211f5 | 3372 | int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file, |
1da177e4 LT |
3373 | struct vm_area_struct *area) |
3374 | { | |
877211f5 | 3375 | struct snd_pcm_runtime *runtime; |
1da177e4 LT |
3376 | long size; |
3377 | unsigned long offset; | |
3378 | size_t dma_bytes; | |
657b1989 | 3379 | int err; |
1da177e4 LT |
3380 | |
3381 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { | |
3382 | if (!(area->vm_flags & (VM_WRITE|VM_READ))) | |
3383 | return -EINVAL; | |
3384 | } else { | |
3385 | if (!(area->vm_flags & VM_READ)) | |
3386 | return -EINVAL; | |
3387 | } | |
3388 | runtime = substream->runtime; | |
1da177e4 LT |
3389 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) |
3390 | return -EBADFD; | |
3391 | if (!(runtime->info & SNDRV_PCM_INFO_MMAP)) | |
3392 | return -ENXIO; | |
3393 | if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED || | |
3394 | runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) | |
3395 | return -EINVAL; | |
3396 | size = area->vm_end - area->vm_start; | |
3397 | offset = area->vm_pgoff << PAGE_SHIFT; | |
3398 | dma_bytes = PAGE_ALIGN(runtime->dma_bytes); | |
3399 | if ((size_t)size > dma_bytes) | |
3400 | return -EINVAL; | |
3401 | if (offset > dma_bytes - size) | |
3402 | return -EINVAL; | |
3403 | ||
657b1989 TI |
3404 | area->vm_ops = &snd_pcm_vm_ops_data; |
3405 | area->vm_private_data = substream; | |
1da177e4 | 3406 | if (substream->ops->mmap) |
657b1989 | 3407 | err = substream->ops->mmap(substream, area); |
1da177e4 | 3408 | else |
18a2b962 | 3409 | err = snd_pcm_lib_default_mmap(substream, area); |
657b1989 TI |
3410 | if (!err) |
3411 | atomic_inc(&substream->mmap_count); | |
3412 | return err; | |
1da177e4 LT |
3413 | } |
3414 | ||
e88e8ae6 TI |
3415 | EXPORT_SYMBOL(snd_pcm_mmap_data); |
3416 | ||
1da177e4 LT |
3417 | static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area) |
3418 | { | |
877211f5 TI |
3419 | struct snd_pcm_file * pcm_file; |
3420 | struct snd_pcm_substream *substream; | |
1da177e4 LT |
3421 | unsigned long offset; |
3422 | ||
3423 | pcm_file = file->private_data; | |
3424 | substream = pcm_file->substream; | |
7eaa943c TI |
3425 | if (PCM_RUNTIME_CHECK(substream)) |
3426 | return -ENXIO; | |
1da177e4 LT |
3427 | |
3428 | offset = area->vm_pgoff << PAGE_SHIFT; | |
3429 | switch (offset) { | |
3430 | case SNDRV_PCM_MMAP_OFFSET_STATUS: | |
548a648b | 3431 | if (pcm_file->no_compat_mmap) |
1da177e4 LT |
3432 | return -ENXIO; |
3433 | return snd_pcm_mmap_status(substream, file, area); | |
3434 | case SNDRV_PCM_MMAP_OFFSET_CONTROL: | |
548a648b | 3435 | if (pcm_file->no_compat_mmap) |
1da177e4 LT |
3436 | return -ENXIO; |
3437 | return snd_pcm_mmap_control(substream, file, area); | |
3438 | default: | |
3439 | return snd_pcm_mmap_data(substream, file, area); | |
3440 | } | |
3441 | return 0; | |
3442 | } | |
3443 | ||
3444 | static int snd_pcm_fasync(int fd, struct file * file, int on) | |
3445 | { | |
877211f5 TI |
3446 | struct snd_pcm_file * pcm_file; |
3447 | struct snd_pcm_substream *substream; | |
3448 | struct snd_pcm_runtime *runtime; | |
1da177e4 LT |
3449 | |
3450 | pcm_file = file->private_data; | |
3451 | substream = pcm_file->substream; | |
7eaa943c | 3452 | if (PCM_RUNTIME_CHECK(substream)) |
d05468b7 | 3453 | return -ENXIO; |
1da177e4 | 3454 | runtime = substream->runtime; |
d05468b7 | 3455 | return fasync_helper(fd, file, on, &runtime->fasync); |
1da177e4 LT |
3456 | } |
3457 | ||
3458 | /* | |
3459 | * ioctl32 compat | |
3460 | */ | |
3461 | #ifdef CONFIG_COMPAT | |
3462 | #include "pcm_compat.c" | |
3463 | #else | |
3464 | #define snd_pcm_ioctl_compat NULL | |
3465 | #endif | |
3466 | ||
3467 | /* | |
3468 | * To be removed helpers to keep binary compatibility | |
3469 | */ | |
3470 | ||
59d48582 | 3471 | #ifdef CONFIG_SND_SUPPORT_OLD_API |
1da177e4 LT |
3472 | #define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5)) |
3473 | #define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5)) | |
3474 | ||
877211f5 TI |
3475 | static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params *params, |
3476 | struct snd_pcm_hw_params_old *oparams) | |
1da177e4 LT |
3477 | { |
3478 | unsigned int i; | |
3479 | ||
3480 | memset(params, 0, sizeof(*params)); | |
3481 | params->flags = oparams->flags; | |
3482 | for (i = 0; i < ARRAY_SIZE(oparams->masks); i++) | |
3483 | params->masks[i].bits[0] = oparams->masks[i]; | |
3484 | memcpy(params->intervals, oparams->intervals, sizeof(oparams->intervals)); | |
3485 | params->rmask = __OLD_TO_NEW_MASK(oparams->rmask); | |
3486 | params->cmask = __OLD_TO_NEW_MASK(oparams->cmask); | |
3487 | params->info = oparams->info; | |
3488 | params->msbits = oparams->msbits; | |
3489 | params->rate_num = oparams->rate_num; | |
3490 | params->rate_den = oparams->rate_den; | |
3491 | params->fifo_size = oparams->fifo_size; | |
3492 | } | |
3493 | ||
877211f5 TI |
3494 | static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old *oparams, |
3495 | struct snd_pcm_hw_params *params) | |
1da177e4 LT |
3496 | { |
3497 | unsigned int i; | |
3498 | ||
3499 | memset(oparams, 0, sizeof(*oparams)); | |
3500 | oparams->flags = params->flags; | |
3501 | for (i = 0; i < ARRAY_SIZE(oparams->masks); i++) | |
3502 | oparams->masks[i] = params->masks[i].bits[0]; | |
3503 | memcpy(oparams->intervals, params->intervals, sizeof(oparams->intervals)); | |
3504 | oparams->rmask = __NEW_TO_OLD_MASK(params->rmask); | |
3505 | oparams->cmask = __NEW_TO_OLD_MASK(params->cmask); | |
3506 | oparams->info = params->info; | |
3507 | oparams->msbits = params->msbits; | |
3508 | oparams->rate_num = params->rate_num; | |
3509 | oparams->rate_den = params->rate_den; | |
3510 | oparams->fifo_size = params->fifo_size; | |
3511 | } | |
3512 | ||
877211f5 TI |
3513 | static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream, |
3514 | struct snd_pcm_hw_params_old __user * _oparams) | |
1da177e4 | 3515 | { |
877211f5 TI |
3516 | struct snd_pcm_hw_params *params; |
3517 | struct snd_pcm_hw_params_old *oparams = NULL; | |
1da177e4 LT |
3518 | int err; |
3519 | ||
3520 | params = kmalloc(sizeof(*params), GFP_KERNEL); | |
ef44a1ec LZ |
3521 | if (!params) |
3522 | return -ENOMEM; | |
1da177e4 | 3523 | |
ef44a1ec LZ |
3524 | oparams = memdup_user(_oparams, sizeof(*oparams)); |
3525 | if (IS_ERR(oparams)) { | |
3526 | err = PTR_ERR(oparams); | |
1da177e4 LT |
3527 | goto out; |
3528 | } | |
3529 | snd_pcm_hw_convert_from_old_params(params, oparams); | |
3530 | err = snd_pcm_hw_refine(substream, params); | |
3531 | snd_pcm_hw_convert_to_old_params(oparams, params); | |
3532 | if (copy_to_user(_oparams, oparams, sizeof(*oparams))) { | |
3533 | if (!err) | |
3534 | err = -EFAULT; | |
3535 | } | |
ef44a1ec LZ |
3536 | |
3537 | kfree(oparams); | |
1da177e4 LT |
3538 | out: |
3539 | kfree(params); | |
1da177e4 LT |
3540 | return err; |
3541 | } | |
3542 | ||
877211f5 TI |
3543 | static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream, |
3544 | struct snd_pcm_hw_params_old __user * _oparams) | |
1da177e4 | 3545 | { |
877211f5 TI |
3546 | struct snd_pcm_hw_params *params; |
3547 | struct snd_pcm_hw_params_old *oparams = NULL; | |
1da177e4 LT |
3548 | int err; |
3549 | ||
3550 | params = kmalloc(sizeof(*params), GFP_KERNEL); | |
ef44a1ec LZ |
3551 | if (!params) |
3552 | return -ENOMEM; | |
3553 | ||
3554 | oparams = memdup_user(_oparams, sizeof(*oparams)); | |
3555 | if (IS_ERR(oparams)) { | |
3556 | err = PTR_ERR(oparams); | |
1da177e4 LT |
3557 | goto out; |
3558 | } | |
3559 | snd_pcm_hw_convert_from_old_params(params, oparams); | |
3560 | err = snd_pcm_hw_params(substream, params); | |
3561 | snd_pcm_hw_convert_to_old_params(oparams, params); | |
3562 | if (copy_to_user(_oparams, oparams, sizeof(*oparams))) { | |
3563 | if (!err) | |
3564 | err = -EFAULT; | |
3565 | } | |
ef44a1ec LZ |
3566 | |
3567 | kfree(oparams); | |
1da177e4 LT |
3568 | out: |
3569 | kfree(params); | |
1da177e4 LT |
3570 | return err; |
3571 | } | |
59d48582 | 3572 | #endif /* CONFIG_SND_SUPPORT_OLD_API */ |
1da177e4 | 3573 | |
7003609b | 3574 | #ifndef CONFIG_MMU |
55c63bd2 DG |
3575 | static unsigned long snd_pcm_get_unmapped_area(struct file *file, |
3576 | unsigned long addr, | |
3577 | unsigned long len, | |
3578 | unsigned long pgoff, | |
3579 | unsigned long flags) | |
3580 | { | |
3581 | struct snd_pcm_file *pcm_file = file->private_data; | |
3582 | struct snd_pcm_substream *substream = pcm_file->substream; | |
3583 | struct snd_pcm_runtime *runtime = substream->runtime; | |
3584 | unsigned long offset = pgoff << PAGE_SHIFT; | |
3585 | ||
3586 | switch (offset) { | |
3587 | case SNDRV_PCM_MMAP_OFFSET_STATUS: | |
3588 | return (unsigned long)runtime->status; | |
3589 | case SNDRV_PCM_MMAP_OFFSET_CONTROL: | |
3590 | return (unsigned long)runtime->control; | |
3591 | default: | |
3592 | return (unsigned long)runtime->dma_area + offset; | |
3593 | } | |
7003609b CC |
3594 | } |
3595 | #else | |
55c63bd2 | 3596 | # define snd_pcm_get_unmapped_area NULL |
7003609b CC |
3597 | #endif |
3598 | ||
1da177e4 LT |
3599 | /* |
3600 | * Register section | |
3601 | */ | |
3602 | ||
9c2e08c5 | 3603 | const struct file_operations snd_pcm_f_ops[2] = { |
1da177e4 | 3604 | { |
2af677fc CL |
3605 | .owner = THIS_MODULE, |
3606 | .write = snd_pcm_write, | |
ee0b3e67 | 3607 | .aio_write = snd_pcm_aio_write, |
f87135f5 | 3608 | .open = snd_pcm_playback_open, |
2af677fc | 3609 | .release = snd_pcm_release, |
02f4865f | 3610 | .llseek = no_llseek, |
2af677fc CL |
3611 | .poll = snd_pcm_playback_poll, |
3612 | .unlocked_ioctl = snd_pcm_playback_ioctl, | |
3613 | .compat_ioctl = snd_pcm_ioctl_compat, | |
3614 | .mmap = snd_pcm_mmap, | |
3615 | .fasync = snd_pcm_fasync, | |
55c63bd2 | 3616 | .get_unmapped_area = snd_pcm_get_unmapped_area, |
1da177e4 LT |
3617 | }, |
3618 | { | |
2af677fc CL |
3619 | .owner = THIS_MODULE, |
3620 | .read = snd_pcm_read, | |
ee0b3e67 | 3621 | .aio_read = snd_pcm_aio_read, |
f87135f5 | 3622 | .open = snd_pcm_capture_open, |
2af677fc | 3623 | .release = snd_pcm_release, |
02f4865f | 3624 | .llseek = no_llseek, |
2af677fc CL |
3625 | .poll = snd_pcm_capture_poll, |
3626 | .unlocked_ioctl = snd_pcm_capture_ioctl, | |
3627 | .compat_ioctl = snd_pcm_ioctl_compat, | |
3628 | .mmap = snd_pcm_mmap, | |
3629 | .fasync = snd_pcm_fasync, | |
55c63bd2 | 3630 | .get_unmapped_area = snd_pcm_get_unmapped_area, |
1da177e4 LT |
3631 | } |
3632 | }; |