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> |
6cbbfe1c | 28 | #include <linux/io.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> | |
e2e40f2c | 37 | #include <linux/uio.h> |
1da177e4 LT |
38 | |
39 | /* | |
40 | * Compatibility | |
41 | */ | |
42 | ||
877211f5 | 43 | struct snd_pcm_hw_params_old { |
1da177e4 LT |
44 | unsigned int flags; |
45 | unsigned int masks[SNDRV_PCM_HW_PARAM_SUBFORMAT - | |
46 | SNDRV_PCM_HW_PARAM_ACCESS + 1]; | |
877211f5 | 47 | struct snd_interval intervals[SNDRV_PCM_HW_PARAM_TICK_TIME - |
1da177e4 LT |
48 | SNDRV_PCM_HW_PARAM_SAMPLE_BITS + 1]; |
49 | unsigned int rmask; | |
50 | unsigned int cmask; | |
51 | unsigned int info; | |
52 | unsigned int msbits; | |
53 | unsigned int rate_num; | |
54 | unsigned int rate_den; | |
877211f5 | 55 | snd_pcm_uframes_t fifo_size; |
1da177e4 LT |
56 | unsigned char reserved[64]; |
57 | }; | |
58 | ||
59d48582 | 59 | #ifdef CONFIG_SND_SUPPORT_OLD_API |
877211f5 TI |
60 | #define SNDRV_PCM_IOCTL_HW_REFINE_OLD _IOWR('A', 0x10, struct snd_pcm_hw_params_old) |
61 | #define SNDRV_PCM_IOCTL_HW_PARAMS_OLD _IOWR('A', 0x11, struct snd_pcm_hw_params_old) | |
1da177e4 | 62 | |
877211f5 TI |
63 | static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream, |
64 | struct snd_pcm_hw_params_old __user * _oparams); | |
65 | static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream, | |
66 | struct snd_pcm_hw_params_old __user * _oparams); | |
59d48582 | 67 | #endif |
f87135f5 | 68 | static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream); |
1da177e4 LT |
69 | |
70 | /* | |
71 | * | |
72 | */ | |
73 | ||
7af142f7 TI |
74 | static DEFINE_RWLOCK(snd_pcm_link_rwlock); |
75 | static DECLARE_RWSEM(snd_pcm_link_rwsem); | |
1da177e4 | 76 | |
30b771cf TI |
77 | /** |
78 | * snd_pcm_stream_lock - Lock the PCM stream | |
79 | * @substream: PCM substream | |
80 | * | |
81 | * This locks the PCM stream's spinlock or mutex depending on the nonatomic | |
82 | * flag of the given substream. This also takes the global link rw lock | |
83 | * (or rw sem), too, for avoiding the race with linked streams. | |
84 | */ | |
7af142f7 TI |
85 | void snd_pcm_stream_lock(struct snd_pcm_substream *substream) |
86 | { | |
87 | if (substream->pcm->nonatomic) { | |
67756e31 | 88 | down_read_nested(&snd_pcm_link_rwsem, SINGLE_DEPTH_NESTING); |
7af142f7 TI |
89 | mutex_lock(&substream->self_group.mutex); |
90 | } else { | |
91 | read_lock(&snd_pcm_link_rwlock); | |
92 | spin_lock(&substream->self_group.lock); | |
93 | } | |
94 | } | |
95 | EXPORT_SYMBOL_GPL(snd_pcm_stream_lock); | |
96 | ||
30b771cf TI |
97 | /** |
98 | * snd_pcm_stream_lock - Unlock the PCM stream | |
99 | * @substream: PCM substream | |
100 | * | |
101 | * This unlocks the PCM stream that has been locked via snd_pcm_stream_lock(). | |
102 | */ | |
7af142f7 TI |
103 | void snd_pcm_stream_unlock(struct snd_pcm_substream *substream) |
104 | { | |
105 | if (substream->pcm->nonatomic) { | |
106 | mutex_unlock(&substream->self_group.mutex); | |
107 | up_read(&snd_pcm_link_rwsem); | |
108 | } else { | |
109 | spin_unlock(&substream->self_group.lock); | |
110 | read_unlock(&snd_pcm_link_rwlock); | |
111 | } | |
112 | } | |
113 | EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock); | |
114 | ||
30b771cf TI |
115 | /** |
116 | * snd_pcm_stream_lock_irq - Lock the PCM stream | |
117 | * @substream: PCM substream | |
118 | * | |
119 | * This locks the PCM stream like snd_pcm_stream_lock() and disables the local | |
120 | * IRQ (only when nonatomic is false). In nonatomic case, this is identical | |
121 | * as snd_pcm_stream_lock(). | |
122 | */ | |
7af142f7 TI |
123 | void snd_pcm_stream_lock_irq(struct snd_pcm_substream *substream) |
124 | { | |
125 | if (!substream->pcm->nonatomic) | |
126 | local_irq_disable(); | |
127 | snd_pcm_stream_lock(substream); | |
128 | } | |
129 | EXPORT_SYMBOL_GPL(snd_pcm_stream_lock_irq); | |
130 | ||
30b771cf TI |
131 | /** |
132 | * snd_pcm_stream_unlock_irq - Unlock the PCM stream | |
133 | * @substream: PCM substream | |
134 | * | |
135 | * This is a counter-part of snd_pcm_stream_lock_irq(). | |
136 | */ | |
7af142f7 TI |
137 | void snd_pcm_stream_unlock_irq(struct snd_pcm_substream *substream) |
138 | { | |
139 | snd_pcm_stream_unlock(substream); | |
140 | if (!substream->pcm->nonatomic) | |
141 | local_irq_enable(); | |
142 | } | |
143 | EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock_irq); | |
144 | ||
145 | unsigned long _snd_pcm_stream_lock_irqsave(struct snd_pcm_substream *substream) | |
146 | { | |
147 | unsigned long flags = 0; | |
148 | if (!substream->pcm->nonatomic) | |
149 | local_irq_save(flags); | |
150 | snd_pcm_stream_lock(substream); | |
151 | return flags; | |
152 | } | |
153 | EXPORT_SYMBOL_GPL(_snd_pcm_stream_lock_irqsave); | |
154 | ||
30b771cf TI |
155 | /** |
156 | * snd_pcm_stream_unlock_irqrestore - Unlock the PCM stream | |
157 | * @substream: PCM substream | |
158 | * @flags: irq flags | |
159 | * | |
160 | * This is a counter-part of snd_pcm_stream_lock_irqsave(). | |
161 | */ | |
7af142f7 TI |
162 | void snd_pcm_stream_unlock_irqrestore(struct snd_pcm_substream *substream, |
163 | unsigned long flags) | |
164 | { | |
165 | snd_pcm_stream_unlock(substream); | |
166 | if (!substream->pcm->nonatomic) | |
167 | local_irq_restore(flags); | |
168 | } | |
169 | EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock_irqrestore); | |
1da177e4 LT |
170 | |
171 | static inline mm_segment_t snd_enter_user(void) | |
172 | { | |
173 | mm_segment_t fs = get_fs(); | |
174 | set_fs(get_ds()); | |
175 | return fs; | |
176 | } | |
177 | ||
178 | static inline void snd_leave_user(mm_segment_t fs) | |
179 | { | |
180 | set_fs(fs); | |
181 | } | |
182 | ||
183 | ||
184 | ||
877211f5 | 185 | int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info) |
1da177e4 | 186 | { |
877211f5 TI |
187 | struct snd_pcm_runtime *runtime; |
188 | struct snd_pcm *pcm = substream->pcm; | |
189 | struct snd_pcm_str *pstr = substream->pstr; | |
1da177e4 | 190 | |
1da177e4 LT |
191 | memset(info, 0, sizeof(*info)); |
192 | info->card = pcm->card->number; | |
193 | info->device = pcm->device; | |
194 | info->stream = substream->stream; | |
195 | info->subdevice = substream->number; | |
196 | strlcpy(info->id, pcm->id, sizeof(info->id)); | |
197 | strlcpy(info->name, pcm->name, sizeof(info->name)); | |
198 | info->dev_class = pcm->dev_class; | |
199 | info->dev_subclass = pcm->dev_subclass; | |
200 | info->subdevices_count = pstr->substream_count; | |
201 | info->subdevices_avail = pstr->substream_count - pstr->substream_opened; | |
202 | strlcpy(info->subname, substream->name, sizeof(info->subname)); | |
203 | runtime = substream->runtime; | |
204 | /* AB: FIXME!!! This is definitely nonsense */ | |
205 | if (runtime) { | |
206 | info->sync = runtime->sync; | |
207 | substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_INFO, info); | |
208 | } | |
209 | return 0; | |
210 | } | |
211 | ||
877211f5 TI |
212 | int snd_pcm_info_user(struct snd_pcm_substream *substream, |
213 | struct snd_pcm_info __user * _info) | |
1da177e4 | 214 | { |
877211f5 | 215 | struct snd_pcm_info *info; |
1da177e4 LT |
216 | int err; |
217 | ||
218 | info = kmalloc(sizeof(*info), GFP_KERNEL); | |
219 | if (! info) | |
220 | return -ENOMEM; | |
221 | err = snd_pcm_info(substream, info); | |
222 | if (err >= 0) { | |
223 | if (copy_to_user(_info, info, sizeof(*info))) | |
224 | err = -EFAULT; | |
225 | } | |
226 | kfree(info); | |
227 | return err; | |
228 | } | |
229 | ||
63825f3a TI |
230 | static bool hw_support_mmap(struct snd_pcm_substream *substream) |
231 | { | |
232 | if (!(substream->runtime->hw.info & SNDRV_PCM_INFO_MMAP)) | |
233 | return false; | |
234 | /* check architectures that return -EINVAL from dma_mmap_coherent() */ | |
235 | /* FIXME: this should be some global flag */ | |
236 | #if defined(CONFIG_C6X) || defined(CONFIG_FRV) || defined(CONFIG_MN10300) ||\ | |
237 | defined(CONFIG_PARISC) || defined(CONFIG_XTENSA) | |
238 | if (!substream->ops->mmap && | |
239 | substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV) | |
240 | return false; | |
241 | #endif | |
242 | return true; | |
243 | } | |
244 | ||
1da177e4 LT |
245 | #undef RULES_DEBUG |
246 | ||
247 | #ifdef RULES_DEBUG | |
248 | #define HW_PARAM(v) [SNDRV_PCM_HW_PARAM_##v] = #v | |
47023ec7 | 249 | static const char * const snd_pcm_hw_param_names[] = { |
1da177e4 LT |
250 | HW_PARAM(ACCESS), |
251 | HW_PARAM(FORMAT), | |
252 | HW_PARAM(SUBFORMAT), | |
253 | HW_PARAM(SAMPLE_BITS), | |
254 | HW_PARAM(FRAME_BITS), | |
255 | HW_PARAM(CHANNELS), | |
256 | HW_PARAM(RATE), | |
257 | HW_PARAM(PERIOD_TIME), | |
258 | HW_PARAM(PERIOD_SIZE), | |
259 | HW_PARAM(PERIOD_BYTES), | |
260 | HW_PARAM(PERIODS), | |
261 | HW_PARAM(BUFFER_TIME), | |
262 | HW_PARAM(BUFFER_SIZE), | |
263 | HW_PARAM(BUFFER_BYTES), | |
264 | HW_PARAM(TICK_TIME), | |
265 | }; | |
266 | #endif | |
267 | ||
877211f5 TI |
268 | int snd_pcm_hw_refine(struct snd_pcm_substream *substream, |
269 | struct snd_pcm_hw_params *params) | |
1da177e4 LT |
270 | { |
271 | unsigned int k; | |
877211f5 TI |
272 | struct snd_pcm_hardware *hw; |
273 | struct snd_interval *i = NULL; | |
274 | struct snd_mask *m = NULL; | |
275 | struct snd_pcm_hw_constraints *constrs = &substream->runtime->hw_constraints; | |
1da177e4 LT |
276 | unsigned int rstamps[constrs->rules_num]; |
277 | unsigned int vstamps[SNDRV_PCM_HW_PARAM_LAST_INTERVAL + 1]; | |
278 | unsigned int stamp = 2; | |
279 | int changed, again; | |
280 | ||
281 | params->info = 0; | |
282 | params->fifo_size = 0; | |
283 | if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_SAMPLE_BITS)) | |
284 | params->msbits = 0; | |
285 | if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_RATE)) { | |
286 | params->rate_num = 0; | |
287 | params->rate_den = 0; | |
288 | } | |
289 | ||
290 | for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) { | |
291 | m = hw_param_mask(params, k); | |
292 | if (snd_mask_empty(m)) | |
293 | return -EINVAL; | |
294 | if (!(params->rmask & (1 << k))) | |
295 | continue; | |
296 | #ifdef RULES_DEBUG | |
09e56df8 TI |
297 | pr_debug("%s = ", snd_pcm_hw_param_names[k]); |
298 | pr_cont("%04x%04x%04x%04x -> ", m->bits[3], m->bits[2], m->bits[1], m->bits[0]); | |
1da177e4 LT |
299 | #endif |
300 | changed = snd_mask_refine(m, constrs_mask(constrs, k)); | |
301 | #ifdef RULES_DEBUG | |
09e56df8 | 302 | pr_cont("%04x%04x%04x%04x\n", m->bits[3], m->bits[2], m->bits[1], m->bits[0]); |
1da177e4 LT |
303 | #endif |
304 | if (changed) | |
305 | params->cmask |= 1 << k; | |
306 | if (changed < 0) | |
307 | return changed; | |
308 | } | |
309 | ||
310 | for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) { | |
311 | i = hw_param_interval(params, k); | |
312 | if (snd_interval_empty(i)) | |
313 | return -EINVAL; | |
314 | if (!(params->rmask & (1 << k))) | |
315 | continue; | |
316 | #ifdef RULES_DEBUG | |
09e56df8 | 317 | pr_debug("%s = ", snd_pcm_hw_param_names[k]); |
1da177e4 | 318 | if (i->empty) |
09e56df8 | 319 | pr_cont("empty"); |
1da177e4 | 320 | else |
09e56df8 | 321 | pr_cont("%c%u %u%c", |
1da177e4 LT |
322 | i->openmin ? '(' : '[', i->min, |
323 | i->max, i->openmax ? ')' : ']'); | |
09e56df8 | 324 | pr_cont(" -> "); |
1da177e4 LT |
325 | #endif |
326 | changed = snd_interval_refine(i, constrs_interval(constrs, k)); | |
327 | #ifdef RULES_DEBUG | |
328 | if (i->empty) | |
09e56df8 | 329 | pr_cont("empty\n"); |
1da177e4 | 330 | else |
09e56df8 | 331 | pr_cont("%c%u %u%c\n", |
1da177e4 LT |
332 | i->openmin ? '(' : '[', i->min, |
333 | i->max, i->openmax ? ')' : ']'); | |
334 | #endif | |
335 | if (changed) | |
336 | params->cmask |= 1 << k; | |
337 | if (changed < 0) | |
338 | return changed; | |
339 | } | |
340 | ||
341 | for (k = 0; k < constrs->rules_num; k++) | |
342 | rstamps[k] = 0; | |
343 | for (k = 0; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) | |
344 | vstamps[k] = (params->rmask & (1 << k)) ? 1 : 0; | |
345 | do { | |
346 | again = 0; | |
347 | for (k = 0; k < constrs->rules_num; k++) { | |
877211f5 | 348 | struct snd_pcm_hw_rule *r = &constrs->rules[k]; |
1da177e4 LT |
349 | unsigned int d; |
350 | int doit = 0; | |
351 | if (r->cond && !(r->cond & params->flags)) | |
352 | continue; | |
353 | for (d = 0; r->deps[d] >= 0; d++) { | |
354 | if (vstamps[r->deps[d]] > rstamps[k]) { | |
355 | doit = 1; | |
356 | break; | |
357 | } | |
358 | } | |
359 | if (!doit) | |
360 | continue; | |
361 | #ifdef RULES_DEBUG | |
09e56df8 | 362 | pr_debug("Rule %d [%p]: ", k, r->func); |
1da177e4 | 363 | if (r->var >= 0) { |
09e56df8 | 364 | pr_cont("%s = ", snd_pcm_hw_param_names[r->var]); |
1da177e4 LT |
365 | if (hw_is_mask(r->var)) { |
366 | m = hw_param_mask(params, r->var); | |
09e56df8 | 367 | pr_cont("%x", *m->bits); |
1da177e4 LT |
368 | } else { |
369 | i = hw_param_interval(params, r->var); | |
370 | if (i->empty) | |
09e56df8 | 371 | pr_cont("empty"); |
1da177e4 | 372 | else |
09e56df8 | 373 | pr_cont("%c%u %u%c", |
1da177e4 LT |
374 | i->openmin ? '(' : '[', i->min, |
375 | i->max, i->openmax ? ')' : ']'); | |
376 | } | |
377 | } | |
378 | #endif | |
379 | changed = r->func(params, r); | |
380 | #ifdef RULES_DEBUG | |
381 | if (r->var >= 0) { | |
09e56df8 | 382 | pr_cont(" -> "); |
1da177e4 | 383 | if (hw_is_mask(r->var)) |
09e56df8 | 384 | pr_cont("%x", *m->bits); |
1da177e4 LT |
385 | else { |
386 | if (i->empty) | |
09e56df8 | 387 | pr_cont("empty"); |
1da177e4 | 388 | else |
09e56df8 | 389 | pr_cont("%c%u %u%c", |
1da177e4 LT |
390 | i->openmin ? '(' : '[', i->min, |
391 | i->max, i->openmax ? ')' : ']'); | |
392 | } | |
393 | } | |
09e56df8 | 394 | pr_cont("\n"); |
1da177e4 LT |
395 | #endif |
396 | rstamps[k] = stamp; | |
397 | if (changed && r->var >= 0) { | |
398 | params->cmask |= (1 << r->var); | |
399 | vstamps[r->var] = stamp; | |
400 | again = 1; | |
401 | } | |
402 | if (changed < 0) | |
403 | return changed; | |
404 | stamp++; | |
405 | } | |
406 | } while (again); | |
407 | if (!params->msbits) { | |
408 | i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS); | |
409 | if (snd_interval_single(i)) | |
410 | params->msbits = snd_interval_value(i); | |
411 | } | |
412 | ||
413 | if (!params->rate_den) { | |
414 | i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE); | |
415 | if (snd_interval_single(i)) { | |
416 | params->rate_num = snd_interval_value(i); | |
417 | params->rate_den = 1; | |
418 | } | |
419 | } | |
420 | ||
421 | hw = &substream->runtime->hw; | |
63825f3a | 422 | if (!params->info) { |
48d88297 LY |
423 | params->info = hw->info & ~(SNDRV_PCM_INFO_FIFO_IN_FRAMES | |
424 | SNDRV_PCM_INFO_DRAIN_TRIGGER); | |
63825f3a TI |
425 | if (!hw_support_mmap(substream)) |
426 | params->info &= ~(SNDRV_PCM_INFO_MMAP | | |
427 | SNDRV_PCM_INFO_MMAP_VALID); | |
428 | } | |
8bea869c | 429 | if (!params->fifo_size) { |
3be522a9 JK |
430 | m = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); |
431 | i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS); | |
432 | if (snd_mask_min(m) == snd_mask_max(m) && | |
433 | snd_interval_min(i) == snd_interval_max(i)) { | |
8bea869c JK |
434 | changed = substream->ops->ioctl(substream, |
435 | SNDRV_PCM_IOCTL1_FIFO_SIZE, params); | |
8bd9bca3 | 436 | if (changed < 0) |
8bea869c JK |
437 | return changed; |
438 | } | |
439 | } | |
1da177e4 LT |
440 | params->rmask = 0; |
441 | return 0; | |
442 | } | |
443 | ||
e88e8ae6 TI |
444 | EXPORT_SYMBOL(snd_pcm_hw_refine); |
445 | ||
877211f5 TI |
446 | static int snd_pcm_hw_refine_user(struct snd_pcm_substream *substream, |
447 | struct snd_pcm_hw_params __user * _params) | |
1da177e4 | 448 | { |
877211f5 | 449 | struct snd_pcm_hw_params *params; |
1da177e4 LT |
450 | int err; |
451 | ||
ef44a1ec LZ |
452 | params = memdup_user(_params, sizeof(*params)); |
453 | if (IS_ERR(params)) | |
454 | return PTR_ERR(params); | |
455 | ||
1da177e4 LT |
456 | err = snd_pcm_hw_refine(substream, params); |
457 | if (copy_to_user(_params, params, sizeof(*params))) { | |
458 | if (!err) | |
459 | err = -EFAULT; | |
460 | } | |
ef44a1ec | 461 | |
1da177e4 LT |
462 | kfree(params); |
463 | return err; | |
464 | } | |
465 | ||
9442e691 TI |
466 | static int period_to_usecs(struct snd_pcm_runtime *runtime) |
467 | { | |
468 | int usecs; | |
469 | ||
470 | if (! runtime->rate) | |
471 | return -1; /* invalid */ | |
472 | ||
473 | /* take 75% of period time as the deadline */ | |
474 | usecs = (750000 / runtime->rate) * runtime->period_size; | |
475 | usecs += ((750000 % runtime->rate) * runtime->period_size) / | |
476 | runtime->rate; | |
477 | ||
478 | return usecs; | |
479 | } | |
480 | ||
9b0573c0 TI |
481 | static void snd_pcm_set_state(struct snd_pcm_substream *substream, int state) |
482 | { | |
483 | snd_pcm_stream_lock_irq(substream); | |
484 | if (substream->runtime->status->state != SNDRV_PCM_STATE_DISCONNECTED) | |
485 | substream->runtime->status->state = state; | |
486 | snd_pcm_stream_unlock_irq(substream); | |
487 | } | |
488 | ||
90bbaf66 JY |
489 | static inline void snd_pcm_timer_notify(struct snd_pcm_substream *substream, |
490 | int event) | |
491 | { | |
492 | #ifdef CONFIG_SND_PCM_TIMER | |
493 | if (substream->timer) | |
494 | snd_timer_notify(substream->timer, event, | |
495 | &substream->runtime->trigger_tstamp); | |
496 | #endif | |
497 | } | |
498 | ||
877211f5 TI |
499 | static int snd_pcm_hw_params(struct snd_pcm_substream *substream, |
500 | struct snd_pcm_hw_params *params) | |
1da177e4 | 501 | { |
877211f5 | 502 | struct snd_pcm_runtime *runtime; |
9442e691 | 503 | int err, usecs; |
1da177e4 LT |
504 | unsigned int bits; |
505 | snd_pcm_uframes_t frames; | |
506 | ||
7eaa943c TI |
507 | if (PCM_RUNTIME_CHECK(substream)) |
508 | return -ENXIO; | |
1da177e4 | 509 | runtime = substream->runtime; |
1da177e4 LT |
510 | snd_pcm_stream_lock_irq(substream); |
511 | switch (runtime->status->state) { | |
512 | case SNDRV_PCM_STATE_OPEN: | |
513 | case SNDRV_PCM_STATE_SETUP: | |
514 | case SNDRV_PCM_STATE_PREPARED: | |
515 | break; | |
516 | default: | |
517 | snd_pcm_stream_unlock_irq(substream); | |
518 | return -EBADFD; | |
519 | } | |
520 | snd_pcm_stream_unlock_irq(substream); | |
8eeaa2f9 | 521 | #if IS_ENABLED(CONFIG_SND_PCM_OSS) |
1da177e4 LT |
522 | if (!substream->oss.oss) |
523 | #endif | |
9c323fcb | 524 | if (atomic_read(&substream->mmap_count)) |
1da177e4 LT |
525 | return -EBADFD; |
526 | ||
527 | params->rmask = ~0U; | |
528 | err = snd_pcm_hw_refine(substream, params); | |
529 | if (err < 0) | |
530 | goto _error; | |
531 | ||
532 | err = snd_pcm_hw_params_choose(substream, params); | |
533 | if (err < 0) | |
534 | goto _error; | |
535 | ||
536 | if (substream->ops->hw_params != NULL) { | |
537 | err = substream->ops->hw_params(substream, params); | |
538 | if (err < 0) | |
539 | goto _error; | |
540 | } | |
541 | ||
542 | runtime->access = params_access(params); | |
543 | runtime->format = params_format(params); | |
544 | runtime->subformat = params_subformat(params); | |
545 | runtime->channels = params_channels(params); | |
546 | runtime->rate = params_rate(params); | |
547 | runtime->period_size = params_period_size(params); | |
548 | runtime->periods = params_periods(params); | |
549 | runtime->buffer_size = params_buffer_size(params); | |
1da177e4 LT |
550 | runtime->info = params->info; |
551 | runtime->rate_num = params->rate_num; | |
552 | runtime->rate_den = params->rate_den; | |
ab69a490 CL |
553 | runtime->no_period_wakeup = |
554 | (params->info & SNDRV_PCM_INFO_NO_PERIOD_WAKEUP) && | |
555 | (params->flags & SNDRV_PCM_HW_PARAMS_NO_PERIOD_WAKEUP); | |
1da177e4 LT |
556 | |
557 | bits = snd_pcm_format_physical_width(runtime->format); | |
558 | runtime->sample_bits = bits; | |
559 | bits *= runtime->channels; | |
560 | runtime->frame_bits = bits; | |
561 | frames = 1; | |
562 | while (bits % 8 != 0) { | |
563 | bits *= 2; | |
564 | frames *= 2; | |
565 | } | |
566 | runtime->byte_align = bits / 8; | |
567 | runtime->min_align = frames; | |
568 | ||
569 | /* Default sw params */ | |
570 | runtime->tstamp_mode = SNDRV_PCM_TSTAMP_NONE; | |
571 | runtime->period_step = 1; | |
1da177e4 | 572 | runtime->control->avail_min = runtime->period_size; |
1da177e4 LT |
573 | runtime->start_threshold = 1; |
574 | runtime->stop_threshold = runtime->buffer_size; | |
575 | runtime->silence_threshold = 0; | |
576 | runtime->silence_size = 0; | |
ead4046b CL |
577 | runtime->boundary = runtime->buffer_size; |
578 | while (runtime->boundary * 2 <= LONG_MAX - runtime->buffer_size) | |
579 | runtime->boundary *= 2; | |
1da177e4 LT |
580 | |
581 | snd_pcm_timer_resolution_change(substream); | |
9b0573c0 | 582 | snd_pcm_set_state(substream, SNDRV_PCM_STATE_SETUP); |
9442e691 | 583 | |
82f68251 JB |
584 | if (pm_qos_request_active(&substream->latency_pm_qos_req)) |
585 | pm_qos_remove_request(&substream->latency_pm_qos_req); | |
9442e691 | 586 | if ((usecs = period_to_usecs(runtime)) >= 0) |
82f68251 JB |
587 | pm_qos_add_request(&substream->latency_pm_qos_req, |
588 | PM_QOS_CPU_DMA_LATENCY, usecs); | |
1da177e4 LT |
589 | return 0; |
590 | _error: | |
25985edc | 591 | /* hardware might be unusable from this time, |
1da177e4 LT |
592 | so we force application to retry to set |
593 | the correct hardware parameter settings */ | |
9b0573c0 | 594 | snd_pcm_set_state(substream, SNDRV_PCM_STATE_OPEN); |
1da177e4 LT |
595 | if (substream->ops->hw_free != NULL) |
596 | substream->ops->hw_free(substream); | |
597 | return err; | |
598 | } | |
599 | ||
877211f5 TI |
600 | static int snd_pcm_hw_params_user(struct snd_pcm_substream *substream, |
601 | struct snd_pcm_hw_params __user * _params) | |
1da177e4 | 602 | { |
877211f5 | 603 | struct snd_pcm_hw_params *params; |
1da177e4 LT |
604 | int err; |
605 | ||
ef44a1ec LZ |
606 | params = memdup_user(_params, sizeof(*params)); |
607 | if (IS_ERR(params)) | |
608 | return PTR_ERR(params); | |
609 | ||
1da177e4 LT |
610 | err = snd_pcm_hw_params(substream, params); |
611 | if (copy_to_user(_params, params, sizeof(*params))) { | |
612 | if (!err) | |
613 | err = -EFAULT; | |
614 | } | |
ef44a1ec | 615 | |
1da177e4 LT |
616 | kfree(params); |
617 | return err; | |
618 | } | |
619 | ||
877211f5 | 620 | static int snd_pcm_hw_free(struct snd_pcm_substream *substream) |
1da177e4 | 621 | { |
877211f5 | 622 | struct snd_pcm_runtime *runtime; |
1da177e4 LT |
623 | int result = 0; |
624 | ||
7eaa943c TI |
625 | if (PCM_RUNTIME_CHECK(substream)) |
626 | return -ENXIO; | |
1da177e4 | 627 | runtime = substream->runtime; |
1da177e4 LT |
628 | snd_pcm_stream_lock_irq(substream); |
629 | switch (runtime->status->state) { | |
630 | case SNDRV_PCM_STATE_SETUP: | |
631 | case SNDRV_PCM_STATE_PREPARED: | |
632 | break; | |
633 | default: | |
634 | snd_pcm_stream_unlock_irq(substream); | |
635 | return -EBADFD; | |
636 | } | |
637 | snd_pcm_stream_unlock_irq(substream); | |
9c323fcb | 638 | if (atomic_read(&substream->mmap_count)) |
1da177e4 LT |
639 | return -EBADFD; |
640 | if (substream->ops->hw_free) | |
641 | result = substream->ops->hw_free(substream); | |
9b0573c0 | 642 | snd_pcm_set_state(substream, SNDRV_PCM_STATE_OPEN); |
82f68251 | 643 | pm_qos_remove_request(&substream->latency_pm_qos_req); |
1da177e4 LT |
644 | return result; |
645 | } | |
646 | ||
877211f5 TI |
647 | static int snd_pcm_sw_params(struct snd_pcm_substream *substream, |
648 | struct snd_pcm_sw_params *params) | |
1da177e4 | 649 | { |
877211f5 | 650 | struct snd_pcm_runtime *runtime; |
1250932e | 651 | int err; |
1da177e4 | 652 | |
7eaa943c TI |
653 | if (PCM_RUNTIME_CHECK(substream)) |
654 | return -ENXIO; | |
1da177e4 | 655 | runtime = substream->runtime; |
1da177e4 LT |
656 | snd_pcm_stream_lock_irq(substream); |
657 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { | |
658 | snd_pcm_stream_unlock_irq(substream); | |
659 | return -EBADFD; | |
660 | } | |
661 | snd_pcm_stream_unlock_irq(substream); | |
662 | ||
145d92e7 DC |
663 | if (params->tstamp_mode < 0 || |
664 | params->tstamp_mode > SNDRV_PCM_TSTAMP_LAST) | |
1da177e4 | 665 | return -EINVAL; |
58900810 TI |
666 | if (params->proto >= SNDRV_PROTOCOL_VERSION(2, 0, 12) && |
667 | params->tstamp_type > SNDRV_PCM_TSTAMP_TYPE_LAST) | |
5646eda5 | 668 | return -EINVAL; |
1da177e4 LT |
669 | if (params->avail_min == 0) |
670 | return -EINVAL; | |
1da177e4 LT |
671 | if (params->silence_size >= runtime->boundary) { |
672 | if (params->silence_threshold != 0) | |
673 | return -EINVAL; | |
674 | } else { | |
675 | if (params->silence_size > params->silence_threshold) | |
676 | return -EINVAL; | |
677 | if (params->silence_threshold > runtime->buffer_size) | |
678 | return -EINVAL; | |
679 | } | |
1250932e | 680 | err = 0; |
1da177e4 LT |
681 | snd_pcm_stream_lock_irq(substream); |
682 | runtime->tstamp_mode = params->tstamp_mode; | |
58900810 TI |
683 | if (params->proto >= SNDRV_PROTOCOL_VERSION(2, 0, 12)) |
684 | runtime->tstamp_type = params->tstamp_type; | |
1da177e4 LT |
685 | runtime->period_step = params->period_step; |
686 | runtime->control->avail_min = params->avail_min; | |
687 | runtime->start_threshold = params->start_threshold; | |
688 | runtime->stop_threshold = params->stop_threshold; | |
689 | runtime->silence_threshold = params->silence_threshold; | |
690 | runtime->silence_size = params->silence_size; | |
1da177e4 LT |
691 | params->boundary = runtime->boundary; |
692 | if (snd_pcm_running(substream)) { | |
1da177e4 LT |
693 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && |
694 | runtime->silence_size > 0) | |
695 | snd_pcm_playback_silence(substream, ULONG_MAX); | |
1250932e | 696 | err = snd_pcm_update_state(substream, runtime); |
1da177e4 LT |
697 | } |
698 | snd_pcm_stream_unlock_irq(substream); | |
1250932e | 699 | return err; |
1da177e4 LT |
700 | } |
701 | ||
877211f5 TI |
702 | static int snd_pcm_sw_params_user(struct snd_pcm_substream *substream, |
703 | struct snd_pcm_sw_params __user * _params) | |
1da177e4 | 704 | { |
877211f5 | 705 | struct snd_pcm_sw_params params; |
1da177e4 LT |
706 | int err; |
707 | if (copy_from_user(¶ms, _params, sizeof(params))) | |
708 | return -EFAULT; | |
709 | err = snd_pcm_sw_params(substream, ¶ms); | |
710 | if (copy_to_user(_params, ¶ms, sizeof(params))) | |
711 | return -EFAULT; | |
712 | return err; | |
713 | } | |
714 | ||
877211f5 TI |
715 | int snd_pcm_status(struct snd_pcm_substream *substream, |
716 | struct snd_pcm_status *status) | |
1da177e4 | 717 | { |
877211f5 | 718 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
719 | |
720 | snd_pcm_stream_lock_irq(substream); | |
3179f620 PLB |
721 | |
722 | snd_pcm_unpack_audio_tstamp_config(status->audio_tstamp_data, | |
723 | &runtime->audio_tstamp_config); | |
724 | ||
725 | /* backwards compatible behavior */ | |
726 | if (runtime->audio_tstamp_config.type_requested == | |
727 | SNDRV_PCM_AUDIO_TSTAMP_TYPE_COMPAT) { | |
728 | if (runtime->hw.info & SNDRV_PCM_INFO_HAS_WALL_CLOCK) | |
729 | runtime->audio_tstamp_config.type_requested = | |
730 | SNDRV_PCM_AUDIO_TSTAMP_TYPE_LINK; | |
731 | else | |
732 | runtime->audio_tstamp_config.type_requested = | |
733 | SNDRV_PCM_AUDIO_TSTAMP_TYPE_DEFAULT; | |
734 | runtime->audio_tstamp_report.valid = 0; | |
735 | } else | |
736 | runtime->audio_tstamp_report.valid = 1; | |
737 | ||
1da177e4 LT |
738 | status->state = runtime->status->state; |
739 | status->suspended_state = runtime->status->suspended_state; | |
740 | if (status->state == SNDRV_PCM_STATE_OPEN) | |
741 | goto _end; | |
742 | status->trigger_tstamp = runtime->trigger_tstamp; | |
8c121586 | 743 | if (snd_pcm_running(substream)) { |
1da177e4 | 744 | snd_pcm_update_hw_ptr(substream); |
8c121586 JK |
745 | if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) { |
746 | status->tstamp = runtime->status->tstamp; | |
3179f620 | 747 | status->driver_tstamp = runtime->driver_tstamp; |
4eeaaeae PLB |
748 | status->audio_tstamp = |
749 | runtime->status->audio_tstamp; | |
3179f620 PLB |
750 | if (runtime->audio_tstamp_report.valid == 1) |
751 | /* backwards compatibility, no report provided in COMPAT mode */ | |
752 | snd_pcm_pack_audio_tstamp_report(&status->audio_tstamp_data, | |
753 | &status->audio_tstamp_accuracy, | |
754 | &runtime->audio_tstamp_report); | |
755 | ||
8c121586 JK |
756 | goto _tstamp_end; |
757 | } | |
0d59b814 PLB |
758 | } else { |
759 | /* get tstamp only in fallback mode and only if enabled */ | |
760 | if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) | |
761 | snd_pcm_gettime(runtime, &status->tstamp); | |
8c121586 | 762 | } |
8c121586 | 763 | _tstamp_end: |
1da177e4 LT |
764 | status->appl_ptr = runtime->control->appl_ptr; |
765 | status->hw_ptr = runtime->status->hw_ptr; | |
766 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { | |
767 | status->avail = snd_pcm_playback_avail(runtime); | |
768 | if (runtime->status->state == SNDRV_PCM_STATE_RUNNING || | |
4bbe1ddf | 769 | runtime->status->state == SNDRV_PCM_STATE_DRAINING) { |
1da177e4 | 770 | status->delay = runtime->buffer_size - status->avail; |
4bbe1ddf TI |
771 | status->delay += runtime->delay; |
772 | } else | |
1da177e4 LT |
773 | status->delay = 0; |
774 | } else { | |
775 | status->avail = snd_pcm_capture_avail(runtime); | |
776 | if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) | |
4bbe1ddf | 777 | status->delay = status->avail + runtime->delay; |
1da177e4 LT |
778 | else |
779 | status->delay = 0; | |
780 | } | |
781 | status->avail_max = runtime->avail_max; | |
782 | status->overrange = runtime->overrange; | |
783 | runtime->avail_max = 0; | |
784 | runtime->overrange = 0; | |
785 | _end: | |
786 | snd_pcm_stream_unlock_irq(substream); | |
787 | return 0; | |
788 | } | |
789 | ||
877211f5 | 790 | static int snd_pcm_status_user(struct snd_pcm_substream *substream, |
38ca2a4d PLB |
791 | struct snd_pcm_status __user * _status, |
792 | bool ext) | |
1da177e4 | 793 | { |
877211f5 | 794 | struct snd_pcm_status status; |
1da177e4 | 795 | int res; |
38ca2a4d | 796 | |
1da177e4 | 797 | memset(&status, 0, sizeof(status)); |
38ca2a4d PLB |
798 | /* |
799 | * with extension, parameters are read/write, | |
800 | * get audio_tstamp_data from user, | |
801 | * ignore rest of status structure | |
802 | */ | |
803 | if (ext && get_user(status.audio_tstamp_data, | |
804 | (u32 __user *)(&_status->audio_tstamp_data))) | |
805 | return -EFAULT; | |
1da177e4 LT |
806 | res = snd_pcm_status(substream, &status); |
807 | if (res < 0) | |
808 | return res; | |
809 | if (copy_to_user(_status, &status, sizeof(status))) | |
810 | return -EFAULT; | |
811 | return 0; | |
812 | } | |
813 | ||
877211f5 TI |
814 | static int snd_pcm_channel_info(struct snd_pcm_substream *substream, |
815 | struct snd_pcm_channel_info * info) | |
1da177e4 | 816 | { |
877211f5 | 817 | struct snd_pcm_runtime *runtime; |
1da177e4 LT |
818 | unsigned int channel; |
819 | ||
1da177e4 LT |
820 | channel = info->channel; |
821 | runtime = substream->runtime; | |
822 | snd_pcm_stream_lock_irq(substream); | |
823 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { | |
824 | snd_pcm_stream_unlock_irq(substream); | |
825 | return -EBADFD; | |
826 | } | |
827 | snd_pcm_stream_unlock_irq(substream); | |
828 | if (channel >= runtime->channels) | |
829 | return -EINVAL; | |
830 | memset(info, 0, sizeof(*info)); | |
831 | info->channel = channel; | |
832 | return substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_CHANNEL_INFO, info); | |
833 | } | |
834 | ||
877211f5 TI |
835 | static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream, |
836 | struct snd_pcm_channel_info __user * _info) | |
1da177e4 | 837 | { |
877211f5 | 838 | struct snd_pcm_channel_info info; |
1da177e4 LT |
839 | int res; |
840 | ||
841 | if (copy_from_user(&info, _info, sizeof(info))) | |
842 | return -EFAULT; | |
843 | res = snd_pcm_channel_info(substream, &info); | |
844 | if (res < 0) | |
845 | return res; | |
846 | if (copy_to_user(_info, &info, sizeof(info))) | |
847 | return -EFAULT; | |
848 | return 0; | |
849 | } | |
850 | ||
877211f5 | 851 | static void snd_pcm_trigger_tstamp(struct snd_pcm_substream *substream) |
1da177e4 | 852 | { |
877211f5 | 853 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
854 | if (runtime->trigger_master == NULL) |
855 | return; | |
856 | if (runtime->trigger_master == substream) { | |
2b79d7a6 PLB |
857 | if (!runtime->trigger_tstamp_latched) |
858 | snd_pcm_gettime(runtime, &runtime->trigger_tstamp); | |
1da177e4 LT |
859 | } else { |
860 | snd_pcm_trigger_tstamp(runtime->trigger_master); | |
861 | runtime->trigger_tstamp = runtime->trigger_master->runtime->trigger_tstamp; | |
862 | } | |
863 | runtime->trigger_master = NULL; | |
864 | } | |
865 | ||
866 | struct action_ops { | |
877211f5 TI |
867 | int (*pre_action)(struct snd_pcm_substream *substream, int state); |
868 | int (*do_action)(struct snd_pcm_substream *substream, int state); | |
869 | void (*undo_action)(struct snd_pcm_substream *substream, int state); | |
870 | void (*post_action)(struct snd_pcm_substream *substream, int state); | |
1da177e4 LT |
871 | }; |
872 | ||
873 | /* | |
874 | * this functions is core for handling of linked stream | |
875 | * Note: the stream state might be changed also on failure | |
876 | * Note2: call with calling stream lock + link lock | |
877 | */ | |
b17154cf | 878 | static int snd_pcm_action_group(const struct action_ops *ops, |
877211f5 | 879 | struct snd_pcm_substream *substream, |
1da177e4 LT |
880 | int state, int do_lock) |
881 | { | |
877211f5 TI |
882 | struct snd_pcm_substream *s = NULL; |
883 | struct snd_pcm_substream *s1; | |
dde1c652 | 884 | int res = 0, depth = 1; |
1da177e4 | 885 | |
ef991b95 | 886 | snd_pcm_group_for_each_entry(s, substream) { |
257f8cce TI |
887 | if (do_lock && s != substream) { |
888 | if (s->pcm->nonatomic) | |
dde1c652 | 889 | mutex_lock_nested(&s->self_group.mutex, depth); |
257f8cce | 890 | else |
dde1c652 TI |
891 | spin_lock_nested(&s->self_group.lock, depth); |
892 | depth++; | |
257f8cce | 893 | } |
1da177e4 LT |
894 | res = ops->pre_action(s, state); |
895 | if (res < 0) | |
896 | goto _unlock; | |
897 | } | |
ef991b95 | 898 | snd_pcm_group_for_each_entry(s, substream) { |
1da177e4 LT |
899 | res = ops->do_action(s, state); |
900 | if (res < 0) { | |
901 | if (ops->undo_action) { | |
ef991b95 | 902 | snd_pcm_group_for_each_entry(s1, substream) { |
1da177e4 LT |
903 | if (s1 == s) /* failed stream */ |
904 | break; | |
905 | ops->undo_action(s1, state); | |
906 | } | |
907 | } | |
908 | s = NULL; /* unlock all */ | |
909 | goto _unlock; | |
910 | } | |
911 | } | |
ef991b95 | 912 | snd_pcm_group_for_each_entry(s, substream) { |
1da177e4 LT |
913 | ops->post_action(s, state); |
914 | } | |
915 | _unlock: | |
916 | if (do_lock) { | |
917 | /* unlock streams */ | |
ef991b95 | 918 | snd_pcm_group_for_each_entry(s1, substream) { |
257f8cce | 919 | if (s1 != substream) { |
811deede | 920 | if (s1->pcm->nonatomic) |
257f8cce TI |
921 | mutex_unlock(&s1->self_group.mutex); |
922 | else | |
923 | spin_unlock(&s1->self_group.lock); | |
924 | } | |
1da177e4 LT |
925 | if (s1 == s) /* end */ |
926 | break; | |
927 | } | |
928 | } | |
929 | return res; | |
930 | } | |
931 | ||
932 | /* | |
933 | * Note: call with stream lock | |
934 | */ | |
b17154cf | 935 | static int snd_pcm_action_single(const struct action_ops *ops, |
877211f5 | 936 | struct snd_pcm_substream *substream, |
1da177e4 LT |
937 | int state) |
938 | { | |
939 | int res; | |
940 | ||
941 | res = ops->pre_action(substream, state); | |
942 | if (res < 0) | |
943 | return res; | |
944 | res = ops->do_action(substream, state); | |
945 | if (res == 0) | |
946 | ops->post_action(substream, state); | |
947 | else if (ops->undo_action) | |
948 | ops->undo_action(substream, state); | |
949 | return res; | |
950 | } | |
951 | ||
aa8edd8c TI |
952 | /* |
953 | * Note: call with stream lock | |
954 | */ | |
b17154cf | 955 | static int snd_pcm_action(const struct action_ops *ops, |
aa8edd8c TI |
956 | struct snd_pcm_substream *substream, |
957 | int state) | |
257f8cce TI |
958 | { |
959 | int res; | |
960 | ||
aa8edd8c TI |
961 | if (!snd_pcm_stream_linked(substream)) |
962 | return snd_pcm_action_single(ops, substream, state); | |
963 | ||
964 | if (substream->pcm->nonatomic) { | |
257f8cce TI |
965 | if (!mutex_trylock(&substream->group->mutex)) { |
966 | mutex_unlock(&substream->self_group.mutex); | |
967 | mutex_lock(&substream->group->mutex); | |
968 | mutex_lock(&substream->self_group.mutex); | |
969 | } | |
970 | res = snd_pcm_action_group(ops, substream, state, 1); | |
971 | mutex_unlock(&substream->group->mutex); | |
972 | } else { | |
1da177e4 LT |
973 | if (!spin_trylock(&substream->group->lock)) { |
974 | spin_unlock(&substream->self_group.lock); | |
975 | spin_lock(&substream->group->lock); | |
976 | spin_lock(&substream->self_group.lock); | |
977 | } | |
978 | res = snd_pcm_action_group(ops, substream, state, 1); | |
979 | spin_unlock(&substream->group->lock); | |
1da177e4 LT |
980 | } |
981 | return res; | |
982 | } | |
983 | ||
984 | /* | |
985 | * Note: don't use any locks before | |
986 | */ | |
b17154cf | 987 | static int snd_pcm_action_lock_irq(const struct action_ops *ops, |
877211f5 | 988 | struct snd_pcm_substream *substream, |
1da177e4 LT |
989 | int state) |
990 | { | |
991 | int res; | |
992 | ||
e3a4bd5e TI |
993 | snd_pcm_stream_lock_irq(substream); |
994 | res = snd_pcm_action(ops, substream, state); | |
995 | snd_pcm_stream_unlock_irq(substream); | |
1da177e4 LT |
996 | return res; |
997 | } | |
998 | ||
999 | /* | |
1000 | */ | |
b17154cf | 1001 | static int snd_pcm_action_nonatomic(const struct action_ops *ops, |
877211f5 | 1002 | struct snd_pcm_substream *substream, |
1da177e4 LT |
1003 | int state) |
1004 | { | |
1005 | int res; | |
1006 | ||
1007 | down_read(&snd_pcm_link_rwsem); | |
1008 | if (snd_pcm_stream_linked(substream)) | |
1009 | res = snd_pcm_action_group(ops, substream, state, 0); | |
1010 | else | |
1011 | res = snd_pcm_action_single(ops, substream, state); | |
1012 | up_read(&snd_pcm_link_rwsem); | |
1013 | return res; | |
1014 | } | |
1015 | ||
1016 | /* | |
1017 | * start callbacks | |
1018 | */ | |
877211f5 | 1019 | static int snd_pcm_pre_start(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1020 | { |
877211f5 | 1021 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1022 | if (runtime->status->state != SNDRV_PCM_STATE_PREPARED) |
1023 | return -EBADFD; | |
1024 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && | |
1025 | !snd_pcm_playback_data(substream)) | |
1026 | return -EPIPE; | |
2b79d7a6 | 1027 | runtime->trigger_tstamp_latched = false; |
1da177e4 LT |
1028 | runtime->trigger_master = substream; |
1029 | return 0; | |
1030 | } | |
1031 | ||
877211f5 | 1032 | static int snd_pcm_do_start(struct snd_pcm_substream *substream, int state) |
1da177e4 LT |
1033 | { |
1034 | if (substream->runtime->trigger_master != substream) | |
1035 | return 0; | |
1036 | return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_START); | |
1037 | } | |
1038 | ||
877211f5 | 1039 | static void snd_pcm_undo_start(struct snd_pcm_substream *substream, int state) |
1da177e4 LT |
1040 | { |
1041 | if (substream->runtime->trigger_master == substream) | |
1042 | substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP); | |
1043 | } | |
1044 | ||
877211f5 | 1045 | static void snd_pcm_post_start(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1046 | { |
877211f5 | 1047 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 | 1048 | snd_pcm_trigger_tstamp(substream); |
6af3fb72 | 1049 | runtime->hw_ptr_jiffies = jiffies; |
bd76af0f JK |
1050 | runtime->hw_ptr_buffer_jiffies = (runtime->buffer_size * HZ) / |
1051 | runtime->rate; | |
1da177e4 LT |
1052 | runtime->status->state = state; |
1053 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && | |
1054 | runtime->silence_size > 0) | |
1055 | snd_pcm_playback_silence(substream, ULONG_MAX); | |
90bbaf66 | 1056 | snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MSTART); |
1da177e4 LT |
1057 | } |
1058 | ||
b17154cf | 1059 | static const struct action_ops snd_pcm_action_start = { |
1da177e4 LT |
1060 | .pre_action = snd_pcm_pre_start, |
1061 | .do_action = snd_pcm_do_start, | |
1062 | .undo_action = snd_pcm_undo_start, | |
1063 | .post_action = snd_pcm_post_start | |
1064 | }; | |
1065 | ||
1066 | /** | |
1c85cc64 | 1067 | * snd_pcm_start - start all linked streams |
df8db936 | 1068 | * @substream: the PCM substream instance |
eb7c06e8 YB |
1069 | * |
1070 | * Return: Zero if successful, or a negative error code. | |
1da177e4 | 1071 | */ |
877211f5 | 1072 | int snd_pcm_start(struct snd_pcm_substream *substream) |
1da177e4 | 1073 | { |
877211f5 TI |
1074 | return snd_pcm_action(&snd_pcm_action_start, substream, |
1075 | SNDRV_PCM_STATE_RUNNING); | |
1da177e4 LT |
1076 | } |
1077 | ||
1078 | /* | |
1079 | * stop callbacks | |
1080 | */ | |
877211f5 | 1081 | static int snd_pcm_pre_stop(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1082 | { |
877211f5 | 1083 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1084 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) |
1085 | return -EBADFD; | |
1086 | runtime->trigger_master = substream; | |
1087 | return 0; | |
1088 | } | |
1089 | ||
877211f5 | 1090 | static int snd_pcm_do_stop(struct snd_pcm_substream *substream, int state) |
1da177e4 LT |
1091 | { |
1092 | if (substream->runtime->trigger_master == substream && | |
1093 | snd_pcm_running(substream)) | |
1094 | substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP); | |
1095 | return 0; /* unconditonally stop all substreams */ | |
1096 | } | |
1097 | ||
877211f5 | 1098 | static void snd_pcm_post_stop(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1099 | { |
877211f5 | 1100 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1101 | if (runtime->status->state != state) { |
1102 | snd_pcm_trigger_tstamp(substream); | |
9bc889b4 | 1103 | runtime->status->state = state; |
90bbaf66 | 1104 | snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MSTOP); |
1da177e4 LT |
1105 | } |
1106 | wake_up(&runtime->sleep); | |
c91a988d | 1107 | wake_up(&runtime->tsleep); |
1da177e4 LT |
1108 | } |
1109 | ||
b17154cf | 1110 | static const struct action_ops snd_pcm_action_stop = { |
1da177e4 LT |
1111 | .pre_action = snd_pcm_pre_stop, |
1112 | .do_action = snd_pcm_do_stop, | |
1113 | .post_action = snd_pcm_post_stop | |
1114 | }; | |
1115 | ||
1116 | /** | |
1c85cc64 | 1117 | * snd_pcm_stop - try to stop all running streams in the substream group |
df8db936 TI |
1118 | * @substream: the PCM substream instance |
1119 | * @state: PCM state after stopping the stream | |
1da177e4 | 1120 | * |
1c85cc64 | 1121 | * The state of each stream is then changed to the given state unconditionally. |
eb7c06e8 | 1122 | * |
0a11458c | 1123 | * Return: Zero if successful, or a negative error code. |
1da177e4 | 1124 | */ |
fea952e5 | 1125 | int snd_pcm_stop(struct snd_pcm_substream *substream, snd_pcm_state_t state) |
1da177e4 LT |
1126 | { |
1127 | return snd_pcm_action(&snd_pcm_action_stop, substream, state); | |
1128 | } | |
1129 | ||
e88e8ae6 TI |
1130 | EXPORT_SYMBOL(snd_pcm_stop); |
1131 | ||
1da177e4 | 1132 | /** |
1c85cc64 | 1133 | * snd_pcm_drain_done - stop the DMA only when the given stream is playback |
df8db936 | 1134 | * @substream: the PCM substream |
1da177e4 | 1135 | * |
1c85cc64 | 1136 | * After stopping, the state is changed to SETUP. |
1da177e4 | 1137 | * Unlike snd_pcm_stop(), this affects only the given stream. |
eb7c06e8 YB |
1138 | * |
1139 | * Return: Zero if succesful, or a negative error code. | |
1da177e4 | 1140 | */ |
877211f5 | 1141 | int snd_pcm_drain_done(struct snd_pcm_substream *substream) |
1da177e4 | 1142 | { |
877211f5 TI |
1143 | return snd_pcm_action_single(&snd_pcm_action_stop, substream, |
1144 | SNDRV_PCM_STATE_SETUP); | |
1da177e4 LT |
1145 | } |
1146 | ||
1fb8510c TI |
1147 | /** |
1148 | * snd_pcm_stop_xrun - stop the running streams as XRUN | |
1149 | * @substream: the PCM substream instance | |
1fb8510c TI |
1150 | * |
1151 | * This stops the given running substream (and all linked substreams) as XRUN. | |
1152 | * Unlike snd_pcm_stop(), this function takes the substream lock by itself. | |
1153 | * | |
1154 | * Return: Zero if successful, or a negative error code. | |
1155 | */ | |
1156 | int snd_pcm_stop_xrun(struct snd_pcm_substream *substream) | |
1157 | { | |
1158 | unsigned long flags; | |
1159 | int ret = 0; | |
1160 | ||
1161 | snd_pcm_stream_lock_irqsave(substream, flags); | |
1162 | if (snd_pcm_running(substream)) | |
1163 | ret = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN); | |
1164 | snd_pcm_stream_unlock_irqrestore(substream, flags); | |
1165 | return ret; | |
1166 | } | |
1167 | EXPORT_SYMBOL_GPL(snd_pcm_stop_xrun); | |
1168 | ||
1da177e4 LT |
1169 | /* |
1170 | * pause callbacks | |
1171 | */ | |
877211f5 | 1172 | static int snd_pcm_pre_pause(struct snd_pcm_substream *substream, int push) |
1da177e4 | 1173 | { |
877211f5 | 1174 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1175 | if (!(runtime->info & SNDRV_PCM_INFO_PAUSE)) |
1176 | return -ENOSYS; | |
1177 | if (push) { | |
1178 | if (runtime->status->state != SNDRV_PCM_STATE_RUNNING) | |
1179 | return -EBADFD; | |
1180 | } else if (runtime->status->state != SNDRV_PCM_STATE_PAUSED) | |
1181 | return -EBADFD; | |
1182 | runtime->trigger_master = substream; | |
1183 | return 0; | |
1184 | } | |
1185 | ||
877211f5 | 1186 | static int snd_pcm_do_pause(struct snd_pcm_substream *substream, int push) |
1da177e4 LT |
1187 | { |
1188 | if (substream->runtime->trigger_master != substream) | |
1189 | return 0; | |
56385a12 JK |
1190 | /* some drivers might use hw_ptr to recover from the pause - |
1191 | update the hw_ptr now */ | |
1192 | if (push) | |
1193 | snd_pcm_update_hw_ptr(substream); | |
6af3fb72 | 1194 | /* The jiffies check in snd_pcm_update_hw_ptr*() is done by |
b595076a | 1195 | * a delta between the current jiffies, this gives a large enough |
6af3fb72 TI |
1196 | * delta, effectively to skip the check once. |
1197 | */ | |
1198 | substream->runtime->hw_ptr_jiffies = jiffies - HZ * 1000; | |
1da177e4 LT |
1199 | return substream->ops->trigger(substream, |
1200 | push ? SNDRV_PCM_TRIGGER_PAUSE_PUSH : | |
1201 | SNDRV_PCM_TRIGGER_PAUSE_RELEASE); | |
1202 | } | |
1203 | ||
877211f5 | 1204 | static void snd_pcm_undo_pause(struct snd_pcm_substream *substream, int push) |
1da177e4 LT |
1205 | { |
1206 | if (substream->runtime->trigger_master == substream) | |
1207 | substream->ops->trigger(substream, | |
1208 | push ? SNDRV_PCM_TRIGGER_PAUSE_RELEASE : | |
1209 | SNDRV_PCM_TRIGGER_PAUSE_PUSH); | |
1210 | } | |
1211 | ||
877211f5 | 1212 | static void snd_pcm_post_pause(struct snd_pcm_substream *substream, int push) |
1da177e4 | 1213 | { |
877211f5 | 1214 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1215 | snd_pcm_trigger_tstamp(substream); |
1216 | if (push) { | |
1217 | runtime->status->state = SNDRV_PCM_STATE_PAUSED; | |
90bbaf66 | 1218 | snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MPAUSE); |
1da177e4 | 1219 | wake_up(&runtime->sleep); |
c91a988d | 1220 | wake_up(&runtime->tsleep); |
1da177e4 LT |
1221 | } else { |
1222 | runtime->status->state = SNDRV_PCM_STATE_RUNNING; | |
90bbaf66 | 1223 | snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MCONTINUE); |
1da177e4 LT |
1224 | } |
1225 | } | |
1226 | ||
b17154cf | 1227 | static const struct action_ops snd_pcm_action_pause = { |
1da177e4 LT |
1228 | .pre_action = snd_pcm_pre_pause, |
1229 | .do_action = snd_pcm_do_pause, | |
1230 | .undo_action = snd_pcm_undo_pause, | |
1231 | .post_action = snd_pcm_post_pause | |
1232 | }; | |
1233 | ||
1234 | /* | |
1235 | * Push/release the pause for all linked streams. | |
1236 | */ | |
877211f5 | 1237 | static int snd_pcm_pause(struct snd_pcm_substream *substream, int push) |
1da177e4 LT |
1238 | { |
1239 | return snd_pcm_action(&snd_pcm_action_pause, substream, push); | |
1240 | } | |
1241 | ||
1242 | #ifdef CONFIG_PM | |
1243 | /* suspend */ | |
1244 | ||
877211f5 | 1245 | static int snd_pcm_pre_suspend(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1246 | { |
877211f5 | 1247 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1248 | if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) |
1249 | return -EBUSY; | |
1250 | runtime->trigger_master = substream; | |
1251 | return 0; | |
1252 | } | |
1253 | ||
877211f5 | 1254 | static int snd_pcm_do_suspend(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1255 | { |
877211f5 | 1256 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1257 | if (runtime->trigger_master != substream) |
1258 | return 0; | |
1259 | if (! snd_pcm_running(substream)) | |
1260 | return 0; | |
1261 | substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND); | |
1262 | return 0; /* suspend unconditionally */ | |
1263 | } | |
1264 | ||
877211f5 | 1265 | static void snd_pcm_post_suspend(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1266 | { |
877211f5 | 1267 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 | 1268 | snd_pcm_trigger_tstamp(substream); |
9bc889b4 TI |
1269 | runtime->status->suspended_state = runtime->status->state; |
1270 | runtime->status->state = SNDRV_PCM_STATE_SUSPENDED; | |
90bbaf66 | 1271 | snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MSUSPEND); |
1da177e4 | 1272 | wake_up(&runtime->sleep); |
c91a988d | 1273 | wake_up(&runtime->tsleep); |
1da177e4 LT |
1274 | } |
1275 | ||
b17154cf | 1276 | static const struct action_ops snd_pcm_action_suspend = { |
1da177e4 LT |
1277 | .pre_action = snd_pcm_pre_suspend, |
1278 | .do_action = snd_pcm_do_suspend, | |
1279 | .post_action = snd_pcm_post_suspend | |
1280 | }; | |
1281 | ||
1282 | /** | |
1c85cc64 | 1283 | * snd_pcm_suspend - trigger SUSPEND to all linked streams |
df8db936 | 1284 | * @substream: the PCM substream |
1da177e4 | 1285 | * |
1da177e4 | 1286 | * After this call, all streams are changed to SUSPENDED state. |
eb7c06e8 YB |
1287 | * |
1288 | * Return: Zero if successful (or @substream is %NULL), or a negative error | |
1289 | * code. | |
1da177e4 | 1290 | */ |
877211f5 | 1291 | int snd_pcm_suspend(struct snd_pcm_substream *substream) |
1da177e4 LT |
1292 | { |
1293 | int err; | |
1294 | unsigned long flags; | |
1295 | ||
603bf524 TI |
1296 | if (! substream) |
1297 | return 0; | |
1298 | ||
1da177e4 LT |
1299 | snd_pcm_stream_lock_irqsave(substream, flags); |
1300 | err = snd_pcm_action(&snd_pcm_action_suspend, substream, 0); | |
1301 | snd_pcm_stream_unlock_irqrestore(substream, flags); | |
1302 | return err; | |
1303 | } | |
1304 | ||
e88e8ae6 TI |
1305 | EXPORT_SYMBOL(snd_pcm_suspend); |
1306 | ||
1da177e4 | 1307 | /** |
1c85cc64 | 1308 | * snd_pcm_suspend_all - trigger SUSPEND to all substreams in the given pcm |
df8db936 | 1309 | * @pcm: the PCM instance |
1da177e4 | 1310 | * |
1da177e4 | 1311 | * After this call, all streams are changed to SUSPENDED state. |
eb7c06e8 YB |
1312 | * |
1313 | * Return: Zero if successful (or @pcm is %NULL), or a negative error code. | |
1da177e4 | 1314 | */ |
877211f5 | 1315 | int snd_pcm_suspend_all(struct snd_pcm *pcm) |
1da177e4 | 1316 | { |
877211f5 | 1317 | struct snd_pcm_substream *substream; |
1da177e4 LT |
1318 | int stream, err = 0; |
1319 | ||
603bf524 TI |
1320 | if (! pcm) |
1321 | return 0; | |
1322 | ||
1da177e4 | 1323 | for (stream = 0; stream < 2; stream++) { |
877211f5 TI |
1324 | for (substream = pcm->streams[stream].substream; |
1325 | substream; substream = substream->next) { | |
1da177e4 LT |
1326 | /* FIXME: the open/close code should lock this as well */ |
1327 | if (substream->runtime == NULL) | |
1328 | continue; | |
1329 | err = snd_pcm_suspend(substream); | |
1330 | if (err < 0 && err != -EBUSY) | |
1331 | return err; | |
1332 | } | |
1333 | } | |
1334 | return 0; | |
1335 | } | |
1336 | ||
e88e8ae6 TI |
1337 | EXPORT_SYMBOL(snd_pcm_suspend_all); |
1338 | ||
1da177e4 LT |
1339 | /* resume */ |
1340 | ||
877211f5 | 1341 | static int snd_pcm_pre_resume(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1342 | { |
877211f5 | 1343 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1344 | if (!(runtime->info & SNDRV_PCM_INFO_RESUME)) |
1345 | return -ENOSYS; | |
1346 | runtime->trigger_master = substream; | |
1347 | return 0; | |
1348 | } | |
1349 | ||
877211f5 | 1350 | static int snd_pcm_do_resume(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1351 | { |
877211f5 | 1352 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1353 | if (runtime->trigger_master != substream) |
1354 | return 0; | |
1355 | /* DMA not running previously? */ | |
1356 | if (runtime->status->suspended_state != SNDRV_PCM_STATE_RUNNING && | |
1357 | (runtime->status->suspended_state != SNDRV_PCM_STATE_DRAINING || | |
1358 | substream->stream != SNDRV_PCM_STREAM_PLAYBACK)) | |
1359 | return 0; | |
1360 | return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_RESUME); | |
1361 | } | |
1362 | ||
877211f5 | 1363 | static void snd_pcm_undo_resume(struct snd_pcm_substream *substream, int state) |
1da177e4 LT |
1364 | { |
1365 | if (substream->runtime->trigger_master == substream && | |
1366 | snd_pcm_running(substream)) | |
1367 | substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND); | |
1368 | } | |
1369 | ||
877211f5 | 1370 | static void snd_pcm_post_resume(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1371 | { |
877211f5 | 1372 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 | 1373 | snd_pcm_trigger_tstamp(substream); |
9bc889b4 | 1374 | runtime->status->state = runtime->status->suspended_state; |
90bbaf66 | 1375 | snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MRESUME); |
1da177e4 LT |
1376 | } |
1377 | ||
b17154cf | 1378 | static const struct action_ops snd_pcm_action_resume = { |
1da177e4 LT |
1379 | .pre_action = snd_pcm_pre_resume, |
1380 | .do_action = snd_pcm_do_resume, | |
1381 | .undo_action = snd_pcm_undo_resume, | |
1382 | .post_action = snd_pcm_post_resume | |
1383 | }; | |
1384 | ||
877211f5 | 1385 | static int snd_pcm_resume(struct snd_pcm_substream *substream) |
1da177e4 | 1386 | { |
877211f5 | 1387 | struct snd_card *card = substream->pcm->card; |
1da177e4 LT |
1388 | int res; |
1389 | ||
1390 | snd_power_lock(card); | |
cbac4b0c | 1391 | if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0) |
1da177e4 LT |
1392 | res = snd_pcm_action_lock_irq(&snd_pcm_action_resume, substream, 0); |
1393 | snd_power_unlock(card); | |
1394 | return res; | |
1395 | } | |
1396 | ||
1397 | #else | |
1398 | ||
877211f5 | 1399 | static int snd_pcm_resume(struct snd_pcm_substream *substream) |
1da177e4 LT |
1400 | { |
1401 | return -ENOSYS; | |
1402 | } | |
1403 | ||
1404 | #endif /* CONFIG_PM */ | |
1405 | ||
1406 | /* | |
1407 | * xrun ioctl | |
1408 | * | |
1409 | * Change the RUNNING stream(s) to XRUN state. | |
1410 | */ | |
877211f5 | 1411 | static int snd_pcm_xrun(struct snd_pcm_substream *substream) |
1da177e4 | 1412 | { |
877211f5 TI |
1413 | struct snd_card *card = substream->pcm->card; |
1414 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1da177e4 LT |
1415 | int result; |
1416 | ||
1417 | snd_power_lock(card); | |
1418 | if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { | |
cbac4b0c | 1419 | result = snd_power_wait(card, SNDRV_CTL_POWER_D0); |
1da177e4 LT |
1420 | if (result < 0) |
1421 | goto _unlock; | |
1422 | } | |
1423 | ||
1424 | snd_pcm_stream_lock_irq(substream); | |
1425 | switch (runtime->status->state) { | |
1426 | case SNDRV_PCM_STATE_XRUN: | |
1427 | result = 0; /* already there */ | |
1428 | break; | |
1429 | case SNDRV_PCM_STATE_RUNNING: | |
1430 | result = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN); | |
1431 | break; | |
1432 | default: | |
1433 | result = -EBADFD; | |
1434 | } | |
1435 | snd_pcm_stream_unlock_irq(substream); | |
1436 | _unlock: | |
1437 | snd_power_unlock(card); | |
1438 | return result; | |
1439 | } | |
1440 | ||
1441 | /* | |
1442 | * reset ioctl | |
1443 | */ | |
877211f5 | 1444 | static int snd_pcm_pre_reset(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1445 | { |
877211f5 | 1446 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1447 | switch (runtime->status->state) { |
1448 | case SNDRV_PCM_STATE_RUNNING: | |
1449 | case SNDRV_PCM_STATE_PREPARED: | |
1450 | case SNDRV_PCM_STATE_PAUSED: | |
1451 | case SNDRV_PCM_STATE_SUSPENDED: | |
1452 | return 0; | |
1453 | default: | |
1454 | return -EBADFD; | |
1455 | } | |
1456 | } | |
1457 | ||
877211f5 | 1458 | static int snd_pcm_do_reset(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1459 | { |
877211f5 | 1460 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1461 | int err = substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL); |
1462 | if (err < 0) | |
1463 | return err; | |
1da177e4 | 1464 | runtime->hw_ptr_base = 0; |
e7636925 JK |
1465 | runtime->hw_ptr_interrupt = runtime->status->hw_ptr - |
1466 | runtime->status->hw_ptr % runtime->period_size; | |
1da177e4 LT |
1467 | runtime->silence_start = runtime->status->hw_ptr; |
1468 | runtime->silence_filled = 0; | |
1469 | return 0; | |
1470 | } | |
1471 | ||
877211f5 | 1472 | static void snd_pcm_post_reset(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1473 | { |
877211f5 | 1474 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1475 | runtime->control->appl_ptr = runtime->status->hw_ptr; |
1476 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && | |
1477 | runtime->silence_size > 0) | |
1478 | snd_pcm_playback_silence(substream, ULONG_MAX); | |
1479 | } | |
1480 | ||
b17154cf | 1481 | static const struct action_ops snd_pcm_action_reset = { |
1da177e4 LT |
1482 | .pre_action = snd_pcm_pre_reset, |
1483 | .do_action = snd_pcm_do_reset, | |
1484 | .post_action = snd_pcm_post_reset | |
1485 | }; | |
1486 | ||
877211f5 | 1487 | static int snd_pcm_reset(struct snd_pcm_substream *substream) |
1da177e4 LT |
1488 | { |
1489 | return snd_pcm_action_nonatomic(&snd_pcm_action_reset, substream, 0); | |
1490 | } | |
1491 | ||
1492 | /* | |
1493 | * prepare ioctl | |
1494 | */ | |
0df63e44 TI |
1495 | /* we use the second argument for updating f_flags */ |
1496 | static int snd_pcm_pre_prepare(struct snd_pcm_substream *substream, | |
1497 | int f_flags) | |
1da177e4 | 1498 | { |
877211f5 | 1499 | struct snd_pcm_runtime *runtime = substream->runtime; |
de1b8b93 TI |
1500 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN || |
1501 | runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED) | |
1da177e4 LT |
1502 | return -EBADFD; |
1503 | if (snd_pcm_running(substream)) | |
1504 | return -EBUSY; | |
0df63e44 | 1505 | substream->f_flags = f_flags; |
1da177e4 LT |
1506 | return 0; |
1507 | } | |
1508 | ||
877211f5 | 1509 | static int snd_pcm_do_prepare(struct snd_pcm_substream *substream, int state) |
1da177e4 LT |
1510 | { |
1511 | int err; | |
1512 | err = substream->ops->prepare(substream); | |
1513 | if (err < 0) | |
1514 | return err; | |
1515 | return snd_pcm_do_reset(substream, 0); | |
1516 | } | |
1517 | ||
877211f5 | 1518 | static void snd_pcm_post_prepare(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1519 | { |
877211f5 | 1520 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 | 1521 | runtime->control->appl_ptr = runtime->status->hw_ptr; |
9b0573c0 | 1522 | snd_pcm_set_state(substream, SNDRV_PCM_STATE_PREPARED); |
1da177e4 LT |
1523 | } |
1524 | ||
b17154cf | 1525 | static const struct action_ops snd_pcm_action_prepare = { |
1da177e4 LT |
1526 | .pre_action = snd_pcm_pre_prepare, |
1527 | .do_action = snd_pcm_do_prepare, | |
1528 | .post_action = snd_pcm_post_prepare | |
1529 | }; | |
1530 | ||
1531 | /** | |
1c85cc64 | 1532 | * snd_pcm_prepare - prepare the PCM substream to be triggerable |
df8db936 | 1533 | * @substream: the PCM substream instance |
0df63e44 | 1534 | * @file: file to refer f_flags |
eb7c06e8 YB |
1535 | * |
1536 | * Return: Zero if successful, or a negative error code. | |
1da177e4 | 1537 | */ |
0df63e44 TI |
1538 | static int snd_pcm_prepare(struct snd_pcm_substream *substream, |
1539 | struct file *file) | |
1da177e4 LT |
1540 | { |
1541 | int res; | |
877211f5 | 1542 | struct snd_card *card = substream->pcm->card; |
0df63e44 TI |
1543 | int f_flags; |
1544 | ||
1545 | if (file) | |
1546 | f_flags = file->f_flags; | |
1547 | else | |
1548 | f_flags = substream->f_flags; | |
1da177e4 LT |
1549 | |
1550 | snd_power_lock(card); | |
cbac4b0c | 1551 | if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0) |
0df63e44 TI |
1552 | res = snd_pcm_action_nonatomic(&snd_pcm_action_prepare, |
1553 | substream, f_flags); | |
1da177e4 LT |
1554 | snd_power_unlock(card); |
1555 | return res; | |
1556 | } | |
1557 | ||
1558 | /* | |
1559 | * drain ioctl | |
1560 | */ | |
1561 | ||
877211f5 | 1562 | static int snd_pcm_pre_drain_init(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1563 | { |
4f7c39dc TI |
1564 | struct snd_pcm_runtime *runtime = substream->runtime; |
1565 | switch (runtime->status->state) { | |
1566 | case SNDRV_PCM_STATE_OPEN: | |
1567 | case SNDRV_PCM_STATE_DISCONNECTED: | |
1568 | case SNDRV_PCM_STATE_SUSPENDED: | |
1569 | return -EBADFD; | |
1570 | } | |
1571 | runtime->trigger_master = substream; | |
1da177e4 LT |
1572 | return 0; |
1573 | } | |
1574 | ||
877211f5 | 1575 | static int snd_pcm_do_drain_init(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1576 | { |
877211f5 | 1577 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1578 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { |
1579 | switch (runtime->status->state) { | |
1580 | case SNDRV_PCM_STATE_PREPARED: | |
1581 | /* start playback stream if possible */ | |
1582 | if (! snd_pcm_playback_empty(substream)) { | |
1583 | snd_pcm_do_start(substream, SNDRV_PCM_STATE_DRAINING); | |
1584 | snd_pcm_post_start(substream, SNDRV_PCM_STATE_DRAINING); | |
70372a75 TI |
1585 | } else { |
1586 | runtime->status->state = SNDRV_PCM_STATE_SETUP; | |
1da177e4 LT |
1587 | } |
1588 | break; | |
1589 | case SNDRV_PCM_STATE_RUNNING: | |
1590 | runtime->status->state = SNDRV_PCM_STATE_DRAINING; | |
1591 | break; | |
4f7c39dc TI |
1592 | case SNDRV_PCM_STATE_XRUN: |
1593 | runtime->status->state = SNDRV_PCM_STATE_SETUP; | |
1594 | break; | |
1da177e4 LT |
1595 | default: |
1596 | break; | |
1597 | } | |
1598 | } else { | |
1599 | /* stop running stream */ | |
1600 | if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) { | |
b05e5787 | 1601 | int new_state = snd_pcm_capture_avail(runtime) > 0 ? |
1da177e4 | 1602 | SNDRV_PCM_STATE_DRAINING : SNDRV_PCM_STATE_SETUP; |
b05e5787 MŚ |
1603 | snd_pcm_do_stop(substream, new_state); |
1604 | snd_pcm_post_stop(substream, new_state); | |
1da177e4 LT |
1605 | } |
1606 | } | |
48d88297 LY |
1607 | |
1608 | if (runtime->status->state == SNDRV_PCM_STATE_DRAINING && | |
1609 | runtime->trigger_master == substream && | |
1610 | (runtime->hw.info & SNDRV_PCM_INFO_DRAIN_TRIGGER)) | |
1611 | return substream->ops->trigger(substream, | |
1612 | SNDRV_PCM_TRIGGER_DRAIN); | |
1613 | ||
1da177e4 LT |
1614 | return 0; |
1615 | } | |
1616 | ||
877211f5 | 1617 | static void snd_pcm_post_drain_init(struct snd_pcm_substream *substream, int state) |
1da177e4 LT |
1618 | { |
1619 | } | |
1620 | ||
b17154cf | 1621 | static const struct action_ops snd_pcm_action_drain_init = { |
1da177e4 LT |
1622 | .pre_action = snd_pcm_pre_drain_init, |
1623 | .do_action = snd_pcm_do_drain_init, | |
1624 | .post_action = snd_pcm_post_drain_init | |
1625 | }; | |
1626 | ||
877211f5 | 1627 | static int snd_pcm_drop(struct snd_pcm_substream *substream); |
1da177e4 LT |
1628 | |
1629 | /* | |
1630 | * Drain the stream(s). | |
1631 | * When the substream is linked, sync until the draining of all playback streams | |
1632 | * is finished. | |
1633 | * After this call, all streams are supposed to be either SETUP or DRAINING | |
1634 | * (capture only) state. | |
1635 | */ | |
4cdc115f TI |
1636 | static int snd_pcm_drain(struct snd_pcm_substream *substream, |
1637 | struct file *file) | |
1da177e4 | 1638 | { |
877211f5 TI |
1639 | struct snd_card *card; |
1640 | struct snd_pcm_runtime *runtime; | |
ef991b95 | 1641 | struct snd_pcm_substream *s; |
d3a7dcfe | 1642 | wait_queue_t wait; |
1da177e4 | 1643 | int result = 0; |
4cdc115f | 1644 | int nonblock = 0; |
1da177e4 | 1645 | |
1da177e4 LT |
1646 | card = substream->pcm->card; |
1647 | runtime = substream->runtime; | |
1648 | ||
1649 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) | |
1650 | return -EBADFD; | |
1651 | ||
1da177e4 LT |
1652 | snd_power_lock(card); |
1653 | if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { | |
cbac4b0c | 1654 | result = snd_power_wait(card, SNDRV_CTL_POWER_D0); |
21cb2a2e TI |
1655 | if (result < 0) { |
1656 | snd_power_unlock(card); | |
1657 | return result; | |
1658 | } | |
1da177e4 LT |
1659 | } |
1660 | ||
4cdc115f TI |
1661 | if (file) { |
1662 | if (file->f_flags & O_NONBLOCK) | |
1663 | nonblock = 1; | |
1664 | } else if (substream->f_flags & O_NONBLOCK) | |
1665 | nonblock = 1; | |
1666 | ||
21cb2a2e | 1667 | down_read(&snd_pcm_link_rwsem); |
21cb2a2e TI |
1668 | snd_pcm_stream_lock_irq(substream); |
1669 | /* resume pause */ | |
d3a7dcfe | 1670 | if (runtime->status->state == SNDRV_PCM_STATE_PAUSED) |
21cb2a2e TI |
1671 | snd_pcm_pause(substream, 0); |
1672 | ||
1673 | /* pre-start/stop - all running streams are changed to DRAINING state */ | |
1674 | result = snd_pcm_action(&snd_pcm_action_drain_init, substream, 0); | |
4cdc115f TI |
1675 | if (result < 0) |
1676 | goto unlock; | |
1677 | /* in non-blocking, we don't wait in ioctl but let caller poll */ | |
1678 | if (nonblock) { | |
1679 | result = -EAGAIN; | |
1680 | goto unlock; | |
21cb2a2e | 1681 | } |
1da177e4 LT |
1682 | |
1683 | for (;;) { | |
1684 | long tout; | |
d3a7dcfe | 1685 | struct snd_pcm_runtime *to_check; |
1da177e4 LT |
1686 | if (signal_pending(current)) { |
1687 | result = -ERESTARTSYS; | |
1688 | break; | |
1689 | } | |
d3a7dcfe TI |
1690 | /* find a substream to drain */ |
1691 | to_check = NULL; | |
1692 | snd_pcm_group_for_each_entry(s, substream) { | |
1693 | if (s->stream != SNDRV_PCM_STREAM_PLAYBACK) | |
1694 | continue; | |
1695 | runtime = s->runtime; | |
1696 | if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) { | |
1697 | to_check = runtime; | |
21cb2a2e | 1698 | break; |
d3a7dcfe | 1699 | } |
21cb2a2e | 1700 | } |
d3a7dcfe TI |
1701 | if (!to_check) |
1702 | break; /* all drained */ | |
1703 | init_waitqueue_entry(&wait, current); | |
1704 | add_wait_queue(&to_check->sleep, &wait); | |
1da177e4 | 1705 | snd_pcm_stream_unlock_irq(substream); |
d3a7dcfe | 1706 | up_read(&snd_pcm_link_rwsem); |
1da177e4 | 1707 | snd_power_unlock(card); |
f2b3614c TI |
1708 | if (runtime->no_period_wakeup) |
1709 | tout = MAX_SCHEDULE_TIMEOUT; | |
1710 | else { | |
1711 | tout = 10; | |
1712 | if (runtime->rate) { | |
1713 | long t = runtime->period_size * 2 / runtime->rate; | |
1714 | tout = max(t, tout); | |
1715 | } | |
1716 | tout = msecs_to_jiffies(tout * 1000); | |
1717 | } | |
1718 | tout = schedule_timeout_interruptible(tout); | |
1da177e4 | 1719 | snd_power_lock(card); |
d3a7dcfe | 1720 | down_read(&snd_pcm_link_rwsem); |
1da177e4 | 1721 | snd_pcm_stream_lock_irq(substream); |
d3a7dcfe | 1722 | remove_wait_queue(&to_check->sleep, &wait); |
0914f796 TI |
1723 | if (card->shutdown) { |
1724 | result = -ENODEV; | |
1725 | break; | |
1726 | } | |
1da177e4 LT |
1727 | if (tout == 0) { |
1728 | if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) | |
1729 | result = -ESTRPIPE; | |
1730 | else { | |
09e56df8 TI |
1731 | dev_dbg(substream->pcm->card->dev, |
1732 | "playback drain error (DMA or IRQ trouble?)\n"); | |
1da177e4 LT |
1733 | snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP); |
1734 | result = -EIO; | |
1735 | } | |
1736 | break; | |
1737 | } | |
1da177e4 | 1738 | } |
21cb2a2e | 1739 | |
4cdc115f | 1740 | unlock: |
21cb2a2e | 1741 | snd_pcm_stream_unlock_irq(substream); |
d3a7dcfe | 1742 | up_read(&snd_pcm_link_rwsem); |
1da177e4 | 1743 | snd_power_unlock(card); |
1da177e4 LT |
1744 | |
1745 | return result; | |
1746 | } | |
1747 | ||
1748 | /* | |
1749 | * drop ioctl | |
1750 | * | |
1751 | * Immediately put all linked substreams into SETUP state. | |
1752 | */ | |
877211f5 | 1753 | static int snd_pcm_drop(struct snd_pcm_substream *substream) |
1da177e4 | 1754 | { |
877211f5 | 1755 | struct snd_pcm_runtime *runtime; |
1da177e4 LT |
1756 | int result = 0; |
1757 | ||
7eaa943c TI |
1758 | if (PCM_RUNTIME_CHECK(substream)) |
1759 | return -ENXIO; | |
1da177e4 | 1760 | runtime = substream->runtime; |
1da177e4 | 1761 | |
de1b8b93 | 1762 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN || |
24e8fc49 TI |
1763 | runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED || |
1764 | runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) | |
1da177e4 LT |
1765 | return -EBADFD; |
1766 | ||
1da177e4 LT |
1767 | snd_pcm_stream_lock_irq(substream); |
1768 | /* resume pause */ | |
1769 | if (runtime->status->state == SNDRV_PCM_STATE_PAUSED) | |
1770 | snd_pcm_pause(substream, 0); | |
1771 | ||
1772 | snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP); | |
1773 | /* runtime->control->appl_ptr = runtime->status->hw_ptr; */ | |
1774 | snd_pcm_stream_unlock_irq(substream); | |
24e8fc49 | 1775 | |
1da177e4 LT |
1776 | return result; |
1777 | } | |
1778 | ||
1779 | ||
0888c321 | 1780 | static bool is_pcm_file(struct file *file) |
1da177e4 | 1781 | { |
0888c321 | 1782 | struct inode *inode = file_inode(file); |
f87135f5 CL |
1783 | unsigned int minor; |
1784 | ||
0888c321 AV |
1785 | if (!S_ISCHR(inode->i_mode) || imajor(inode) != snd_major) |
1786 | return false; | |
1da177e4 | 1787 | minor = iminor(inode); |
0888c321 AV |
1788 | return snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_PLAYBACK) || |
1789 | snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_CAPTURE); | |
1da177e4 LT |
1790 | } |
1791 | ||
1792 | /* | |
1793 | * PCM link handling | |
1794 | */ | |
877211f5 | 1795 | static int snd_pcm_link(struct snd_pcm_substream *substream, int fd) |
1da177e4 LT |
1796 | { |
1797 | int res = 0; | |
877211f5 TI |
1798 | struct snd_pcm_file *pcm_file; |
1799 | struct snd_pcm_substream *substream1; | |
1662591b | 1800 | struct snd_pcm_group *group; |
0888c321 | 1801 | struct fd f = fdget(fd); |
1da177e4 | 1802 | |
0888c321 | 1803 | if (!f.file) |
1da177e4 | 1804 | return -EBADFD; |
0888c321 AV |
1805 | if (!is_pcm_file(f.file)) { |
1806 | res = -EBADFD; | |
1807 | goto _badf; | |
1808 | } | |
1809 | pcm_file = f.file->private_data; | |
1da177e4 | 1810 | substream1 = pcm_file->substream; |
1662591b TI |
1811 | group = kmalloc(sizeof(*group), GFP_KERNEL); |
1812 | if (!group) { | |
1813 | res = -ENOMEM; | |
1814 | goto _nolock; | |
1815 | } | |
1da177e4 LT |
1816 | down_write(&snd_pcm_link_rwsem); |
1817 | write_lock_irq(&snd_pcm_link_rwlock); | |
1818 | if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN || | |
257f8cce TI |
1819 | substream->runtime->status->state != substream1->runtime->status->state || |
1820 | substream->pcm->nonatomic != substream1->pcm->nonatomic) { | |
1da177e4 LT |
1821 | res = -EBADFD; |
1822 | goto _end; | |
1823 | } | |
1824 | if (snd_pcm_stream_linked(substream1)) { | |
1825 | res = -EALREADY; | |
1826 | goto _end; | |
1827 | } | |
1828 | if (!snd_pcm_stream_linked(substream)) { | |
1662591b | 1829 | substream->group = group; |
dd6c5cd8 | 1830 | group = NULL; |
1da177e4 | 1831 | spin_lock_init(&substream->group->lock); |
257f8cce | 1832 | mutex_init(&substream->group->mutex); |
1da177e4 LT |
1833 | INIT_LIST_HEAD(&substream->group->substreams); |
1834 | list_add_tail(&substream->link_list, &substream->group->substreams); | |
1835 | substream->group->count = 1; | |
1836 | } | |
1837 | list_add_tail(&substream1->link_list, &substream->group->substreams); | |
1838 | substream->group->count++; | |
1839 | substream1->group = substream->group; | |
1840 | _end: | |
1841 | write_unlock_irq(&snd_pcm_link_rwlock); | |
1842 | up_write(&snd_pcm_link_rwsem); | |
1662591b | 1843 | _nolock: |
a0830dbd | 1844 | snd_card_unref(substream1->pcm->card); |
dd6c5cd8 | 1845 | kfree(group); |
0888c321 AV |
1846 | _badf: |
1847 | fdput(f); | |
1da177e4 LT |
1848 | return res; |
1849 | } | |
1850 | ||
877211f5 | 1851 | static void relink_to_local(struct snd_pcm_substream *substream) |
1da177e4 LT |
1852 | { |
1853 | substream->group = &substream->self_group; | |
1854 | INIT_LIST_HEAD(&substream->self_group.substreams); | |
1855 | list_add_tail(&substream->link_list, &substream->self_group.substreams); | |
1856 | } | |
1857 | ||
877211f5 | 1858 | static int snd_pcm_unlink(struct snd_pcm_substream *substream) |
1da177e4 | 1859 | { |
ef991b95 | 1860 | struct snd_pcm_substream *s; |
1da177e4 LT |
1861 | int res = 0; |
1862 | ||
1863 | down_write(&snd_pcm_link_rwsem); | |
1864 | write_lock_irq(&snd_pcm_link_rwlock); | |
1865 | if (!snd_pcm_stream_linked(substream)) { | |
1866 | res = -EALREADY; | |
1867 | goto _end; | |
1868 | } | |
1869 | list_del(&substream->link_list); | |
1870 | substream->group->count--; | |
1871 | if (substream->group->count == 1) { /* detach the last stream, too */ | |
ef991b95 TI |
1872 | snd_pcm_group_for_each_entry(s, substream) { |
1873 | relink_to_local(s); | |
1da177e4 LT |
1874 | break; |
1875 | } | |
1876 | kfree(substream->group); | |
1877 | } | |
1878 | relink_to_local(substream); | |
1879 | _end: | |
1880 | write_unlock_irq(&snd_pcm_link_rwlock); | |
1881 | up_write(&snd_pcm_link_rwsem); | |
1882 | return res; | |
1883 | } | |
1884 | ||
1885 | /* | |
1886 | * hw configurator | |
1887 | */ | |
877211f5 TI |
1888 | static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params *params, |
1889 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 1890 | { |
877211f5 | 1891 | struct snd_interval t; |
1da177e4 LT |
1892 | snd_interval_mul(hw_param_interval_c(params, rule->deps[0]), |
1893 | hw_param_interval_c(params, rule->deps[1]), &t); | |
1894 | return snd_interval_refine(hw_param_interval(params, rule->var), &t); | |
1895 | } | |
1896 | ||
877211f5 TI |
1897 | static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params *params, |
1898 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 1899 | { |
877211f5 | 1900 | struct snd_interval t; |
1da177e4 LT |
1901 | snd_interval_div(hw_param_interval_c(params, rule->deps[0]), |
1902 | hw_param_interval_c(params, rule->deps[1]), &t); | |
1903 | return snd_interval_refine(hw_param_interval(params, rule->var), &t); | |
1904 | } | |
1905 | ||
877211f5 TI |
1906 | static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params *params, |
1907 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 1908 | { |
877211f5 | 1909 | struct snd_interval t; |
1da177e4 LT |
1910 | snd_interval_muldivk(hw_param_interval_c(params, rule->deps[0]), |
1911 | hw_param_interval_c(params, rule->deps[1]), | |
1912 | (unsigned long) rule->private, &t); | |
1913 | return snd_interval_refine(hw_param_interval(params, rule->var), &t); | |
1914 | } | |
1915 | ||
877211f5 TI |
1916 | static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params *params, |
1917 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 1918 | { |
877211f5 | 1919 | struct snd_interval t; |
1da177e4 LT |
1920 | snd_interval_mulkdiv(hw_param_interval_c(params, rule->deps[0]), |
1921 | (unsigned long) rule->private, | |
1922 | hw_param_interval_c(params, rule->deps[1]), &t); | |
1923 | return snd_interval_refine(hw_param_interval(params, rule->var), &t); | |
1924 | } | |
1925 | ||
877211f5 TI |
1926 | static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params *params, |
1927 | struct snd_pcm_hw_rule *rule) | |
1da177e4 LT |
1928 | { |
1929 | unsigned int k; | |
877211f5 TI |
1930 | struct snd_interval *i = hw_param_interval(params, rule->deps[0]); |
1931 | struct snd_mask m; | |
1932 | struct snd_mask *mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); | |
1da177e4 LT |
1933 | snd_mask_any(&m); |
1934 | for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) { | |
1935 | int bits; | |
1936 | if (! snd_mask_test(mask, k)) | |
1937 | continue; | |
1938 | bits = snd_pcm_format_physical_width(k); | |
1939 | if (bits <= 0) | |
1940 | continue; /* ignore invalid formats */ | |
1941 | if ((unsigned)bits < i->min || (unsigned)bits > i->max) | |
1942 | snd_mask_reset(&m, k); | |
1943 | } | |
1944 | return snd_mask_refine(mask, &m); | |
1945 | } | |
1946 | ||
877211f5 TI |
1947 | static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params *params, |
1948 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 1949 | { |
877211f5 | 1950 | struct snd_interval t; |
1da177e4 LT |
1951 | unsigned int k; |
1952 | t.min = UINT_MAX; | |
1953 | t.max = 0; | |
1954 | t.openmin = 0; | |
1955 | t.openmax = 0; | |
1956 | for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) { | |
1957 | int bits; | |
1958 | if (! snd_mask_test(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), k)) | |
1959 | continue; | |
1960 | bits = snd_pcm_format_physical_width(k); | |
1961 | if (bits <= 0) | |
1962 | continue; /* ignore invalid formats */ | |
1963 | if (t.min > (unsigned)bits) | |
1964 | t.min = bits; | |
1965 | if (t.max < (unsigned)bits) | |
1966 | t.max = bits; | |
1967 | } | |
1968 | t.integer = 1; | |
1969 | return snd_interval_refine(hw_param_interval(params, rule->var), &t); | |
1970 | } | |
1971 | ||
1972 | #if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12 | |
1973 | #error "Change this table" | |
1974 | #endif | |
1975 | ||
1976 | static unsigned int rates[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100, | |
1977 | 48000, 64000, 88200, 96000, 176400, 192000 }; | |
1978 | ||
7653d557 CL |
1979 | const struct snd_pcm_hw_constraint_list snd_pcm_known_rates = { |
1980 | .count = ARRAY_SIZE(rates), | |
1981 | .list = rates, | |
1982 | }; | |
1983 | ||
877211f5 TI |
1984 | static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params *params, |
1985 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 1986 | { |
877211f5 | 1987 | struct snd_pcm_hardware *hw = rule->private; |
1da177e4 | 1988 | return snd_interval_list(hw_param_interval(params, rule->var), |
7653d557 CL |
1989 | snd_pcm_known_rates.count, |
1990 | snd_pcm_known_rates.list, hw->rates); | |
1da177e4 LT |
1991 | } |
1992 | ||
877211f5 TI |
1993 | static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params *params, |
1994 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 1995 | { |
877211f5 TI |
1996 | struct snd_interval t; |
1997 | struct snd_pcm_substream *substream = rule->private; | |
1da177e4 LT |
1998 | t.min = 0; |
1999 | t.max = substream->buffer_bytes_max; | |
2000 | t.openmin = 0; | |
2001 | t.openmax = 0; | |
2002 | t.integer = 1; | |
2003 | return snd_interval_refine(hw_param_interval(params, rule->var), &t); | |
2004 | } | |
2005 | ||
877211f5 | 2006 | int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream) |
1da177e4 | 2007 | { |
877211f5 TI |
2008 | struct snd_pcm_runtime *runtime = substream->runtime; |
2009 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; | |
1da177e4 LT |
2010 | int k, err; |
2011 | ||
2012 | for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) { | |
2013 | snd_mask_any(constrs_mask(constrs, k)); | |
2014 | } | |
2015 | ||
2016 | for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) { | |
2017 | snd_interval_any(constrs_interval(constrs, k)); | |
2018 | } | |
2019 | ||
2020 | snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS)); | |
2021 | snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE)); | |
2022 | snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES)); | |
2023 | snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS)); | |
2024 | snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS)); | |
2025 | ||
2026 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT, | |
2027 | snd_pcm_hw_rule_format, NULL, | |
2028 | SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); | |
2029 | if (err < 0) | |
2030 | return err; | |
2031 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, | |
2032 | snd_pcm_hw_rule_sample_bits, NULL, | |
2033 | SNDRV_PCM_HW_PARAM_FORMAT, | |
2034 | SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); | |
2035 | if (err < 0) | |
2036 | return err; | |
2037 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, | |
2038 | snd_pcm_hw_rule_div, NULL, | |
2039 | SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1); | |
2040 | if (err < 0) | |
2041 | return err; | |
2042 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, | |
2043 | snd_pcm_hw_rule_mul, NULL, | |
2044 | SNDRV_PCM_HW_PARAM_SAMPLE_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1); | |
2045 | if (err < 0) | |
2046 | return err; | |
2047 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, | |
2048 | snd_pcm_hw_rule_mulkdiv, (void*) 8, | |
2049 | SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1); | |
2050 | if (err < 0) | |
2051 | return err; | |
2052 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, | |
2053 | snd_pcm_hw_rule_mulkdiv, (void*) 8, | |
2054 | SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1); | |
2055 | if (err < 0) | |
2056 | return err; | |
2057 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS, | |
2058 | snd_pcm_hw_rule_div, NULL, | |
2059 | SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); | |
2060 | if (err < 0) | |
2061 | return err; | |
2062 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, | |
2063 | snd_pcm_hw_rule_mulkdiv, (void*) 1000000, | |
2064 | SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, -1); | |
2065 | if (err < 0) | |
2066 | return err; | |
2067 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, | |
2068 | snd_pcm_hw_rule_mulkdiv, (void*) 1000000, | |
2069 | SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_BUFFER_TIME, -1); | |
2070 | if (err < 0) | |
2071 | return err; | |
2072 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS, | |
2073 | snd_pcm_hw_rule_div, NULL, | |
2074 | SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1); | |
2075 | if (err < 0) | |
2076 | return err; | |
2077 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, | |
2078 | snd_pcm_hw_rule_div, NULL, | |
2079 | SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1); | |
2080 | if (err < 0) | |
2081 | return err; | |
2082 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, | |
2083 | snd_pcm_hw_rule_mulkdiv, (void*) 8, | |
2084 | SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); | |
2085 | if (err < 0) | |
2086 | return err; | |
2087 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, | |
2088 | snd_pcm_hw_rule_muldivk, (void*) 1000000, | |
2089 | SNDRV_PCM_HW_PARAM_PERIOD_TIME, SNDRV_PCM_HW_PARAM_RATE, -1); | |
2090 | if (err < 0) | |
2091 | return err; | |
2092 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, | |
2093 | snd_pcm_hw_rule_mul, NULL, | |
2094 | SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1); | |
2095 | if (err < 0) | |
2096 | return err; | |
2097 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, | |
2098 | snd_pcm_hw_rule_mulkdiv, (void*) 8, | |
2099 | SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); | |
2100 | if (err < 0) | |
2101 | return err; | |
2102 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, | |
2103 | snd_pcm_hw_rule_muldivk, (void*) 1000000, | |
2104 | SNDRV_PCM_HW_PARAM_BUFFER_TIME, SNDRV_PCM_HW_PARAM_RATE, -1); | |
2105 | if (err < 0) | |
2106 | return err; | |
2107 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, | |
2108 | snd_pcm_hw_rule_muldivk, (void*) 8, | |
2109 | SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); | |
2110 | if (err < 0) | |
2111 | return err; | |
2112 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, | |
2113 | snd_pcm_hw_rule_muldivk, (void*) 8, | |
2114 | SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); | |
2115 | if (err < 0) | |
2116 | return err; | |
2117 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME, | |
2118 | snd_pcm_hw_rule_mulkdiv, (void*) 1000000, | |
2119 | SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1); | |
2120 | if (err < 0) | |
2121 | return err; | |
2122 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME, | |
2123 | snd_pcm_hw_rule_mulkdiv, (void*) 1000000, | |
2124 | SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1); | |
2125 | if (err < 0) | |
2126 | return err; | |
2127 | return 0; | |
2128 | } | |
2129 | ||
877211f5 | 2130 | int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream) |
1da177e4 | 2131 | { |
877211f5 TI |
2132 | struct snd_pcm_runtime *runtime = substream->runtime; |
2133 | struct snd_pcm_hardware *hw = &runtime->hw; | |
1da177e4 LT |
2134 | int err; |
2135 | unsigned int mask = 0; | |
2136 | ||
2137 | if (hw->info & SNDRV_PCM_INFO_INTERLEAVED) | |
2138 | mask |= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED; | |
2139 | if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED) | |
2140 | mask |= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED; | |
63825f3a | 2141 | if (hw_support_mmap(substream)) { |
1da177e4 LT |
2142 | if (hw->info & SNDRV_PCM_INFO_INTERLEAVED) |
2143 | mask |= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED; | |
2144 | if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED) | |
2145 | mask |= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED; | |
2146 | if (hw->info & SNDRV_PCM_INFO_COMPLEX) | |
2147 | mask |= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX; | |
2148 | } | |
2149 | err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask); | |
7eaa943c TI |
2150 | if (err < 0) |
2151 | return err; | |
1da177e4 LT |
2152 | |
2153 | err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats); | |
7eaa943c TI |
2154 | if (err < 0) |
2155 | return err; | |
1da177e4 LT |
2156 | |
2157 | err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT, 1 << SNDRV_PCM_SUBFORMAT_STD); | |
7eaa943c TI |
2158 | if (err < 0) |
2159 | return err; | |
1da177e4 LT |
2160 | |
2161 | err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS, | |
2162 | hw->channels_min, hw->channels_max); | |
7eaa943c TI |
2163 | if (err < 0) |
2164 | return err; | |
1da177e4 LT |
2165 | |
2166 | err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE, | |
2167 | hw->rate_min, hw->rate_max); | |
8b90ca08 GL |
2168 | if (err < 0) |
2169 | return err; | |
1da177e4 LT |
2170 | |
2171 | err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, | |
2172 | hw->period_bytes_min, hw->period_bytes_max); | |
8b90ca08 GL |
2173 | if (err < 0) |
2174 | return err; | |
1da177e4 LT |
2175 | |
2176 | err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS, | |
2177 | hw->periods_min, hw->periods_max); | |
7eaa943c TI |
2178 | if (err < 0) |
2179 | return err; | |
1da177e4 LT |
2180 | |
2181 | err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, | |
2182 | hw->period_bytes_min, hw->buffer_bytes_max); | |
7eaa943c TI |
2183 | if (err < 0) |
2184 | return err; | |
1da177e4 LT |
2185 | |
2186 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, | |
2187 | snd_pcm_hw_rule_buffer_bytes_max, substream, | |
2188 | SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1); | |
2189 | if (err < 0) | |
2190 | return err; | |
2191 | ||
2192 | /* FIXME: remove */ | |
2193 | if (runtime->dma_bytes) { | |
2194 | err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes); | |
7eaa943c | 2195 | if (err < 0) |
6cf95152 | 2196 | return err; |
1da177e4 LT |
2197 | } |
2198 | ||
2199 | if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) { | |
2200 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, | |
2201 | snd_pcm_hw_rule_rate, hw, | |
2202 | SNDRV_PCM_HW_PARAM_RATE, -1); | |
2203 | if (err < 0) | |
2204 | return err; | |
2205 | } | |
2206 | ||
2207 | /* FIXME: this belong to lowlevel */ | |
1da177e4 LT |
2208 | snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE); |
2209 | ||
2210 | return 0; | |
2211 | } | |
2212 | ||
3bf75f9b | 2213 | static void pcm_release_private(struct snd_pcm_substream *substream) |
1da177e4 | 2214 | { |
1da177e4 | 2215 | snd_pcm_unlink(substream); |
3bf75f9b TI |
2216 | } |
2217 | ||
2218 | void snd_pcm_release_substream(struct snd_pcm_substream *substream) | |
2219 | { | |
0df63e44 TI |
2220 | substream->ref_count--; |
2221 | if (substream->ref_count > 0) | |
2222 | return; | |
2223 | ||
3bf75f9b | 2224 | snd_pcm_drop(substream); |
3bf75f9b | 2225 | if (substream->hw_opened) { |
094435d4 TI |
2226 | if (substream->ops->hw_free && |
2227 | substream->runtime->status->state != SNDRV_PCM_STATE_OPEN) | |
1da177e4 LT |
2228 | substream->ops->hw_free(substream); |
2229 | substream->ops->close(substream); | |
3bf75f9b | 2230 | substream->hw_opened = 0; |
1da177e4 | 2231 | } |
8699a0b6 TI |
2232 | if (pm_qos_request_active(&substream->latency_pm_qos_req)) |
2233 | pm_qos_remove_request(&substream->latency_pm_qos_req); | |
1576274d TI |
2234 | if (substream->pcm_release) { |
2235 | substream->pcm_release(substream); | |
2236 | substream->pcm_release = NULL; | |
2237 | } | |
3bf75f9b TI |
2238 | snd_pcm_detach_substream(substream); |
2239 | } | |
2240 | ||
e88e8ae6 TI |
2241 | EXPORT_SYMBOL(snd_pcm_release_substream); |
2242 | ||
3bf75f9b TI |
2243 | int snd_pcm_open_substream(struct snd_pcm *pcm, int stream, |
2244 | struct file *file, | |
2245 | struct snd_pcm_substream **rsubstream) | |
2246 | { | |
2247 | struct snd_pcm_substream *substream; | |
2248 | int err; | |
2249 | ||
2250 | err = snd_pcm_attach_substream(pcm, stream, file, &substream); | |
2251 | if (err < 0) | |
2252 | return err; | |
0df63e44 TI |
2253 | if (substream->ref_count > 1) { |
2254 | *rsubstream = substream; | |
2255 | return 0; | |
2256 | } | |
2257 | ||
3bf75f9b TI |
2258 | err = snd_pcm_hw_constraints_init(substream); |
2259 | if (err < 0) { | |
09e56df8 | 2260 | pcm_dbg(pcm, "snd_pcm_hw_constraints_init failed\n"); |
3bf75f9b TI |
2261 | goto error; |
2262 | } | |
2263 | ||
2264 | if ((err = substream->ops->open(substream)) < 0) | |
2265 | goto error; | |
2266 | ||
2267 | substream->hw_opened = 1; | |
2268 | ||
2269 | err = snd_pcm_hw_constraints_complete(substream); | |
2270 | if (err < 0) { | |
09e56df8 | 2271 | pcm_dbg(pcm, "snd_pcm_hw_constraints_complete failed\n"); |
3bf75f9b TI |
2272 | goto error; |
2273 | } | |
2274 | ||
2275 | *rsubstream = substream; | |
1da177e4 | 2276 | return 0; |
3bf75f9b TI |
2277 | |
2278 | error: | |
2279 | snd_pcm_release_substream(substream); | |
2280 | return err; | |
1da177e4 LT |
2281 | } |
2282 | ||
e88e8ae6 TI |
2283 | EXPORT_SYMBOL(snd_pcm_open_substream); |
2284 | ||
1da177e4 | 2285 | static int snd_pcm_open_file(struct file *file, |
877211f5 | 2286 | struct snd_pcm *pcm, |
ffd3d5c6 | 2287 | int stream) |
1da177e4 | 2288 | { |
877211f5 TI |
2289 | struct snd_pcm_file *pcm_file; |
2290 | struct snd_pcm_substream *substream; | |
3bf75f9b | 2291 | int err; |
1da177e4 | 2292 | |
3bf75f9b TI |
2293 | err = snd_pcm_open_substream(pcm, stream, file, &substream); |
2294 | if (err < 0) | |
2295 | return err; | |
2296 | ||
548a648b TI |
2297 | pcm_file = kzalloc(sizeof(*pcm_file), GFP_KERNEL); |
2298 | if (pcm_file == NULL) { | |
2299 | snd_pcm_release_substream(substream); | |
2300 | return -ENOMEM; | |
2301 | } | |
2302 | pcm_file->substream = substream; | |
2303 | if (substream->ref_count == 1) { | |
0df63e44 TI |
2304 | substream->file = pcm_file; |
2305 | substream->pcm_release = pcm_release_private; | |
1da177e4 | 2306 | } |
1da177e4 | 2307 | file->private_data = pcm_file; |
ffd3d5c6 | 2308 | |
1da177e4 LT |
2309 | return 0; |
2310 | } | |
2311 | ||
f87135f5 CL |
2312 | static int snd_pcm_playback_open(struct inode *inode, struct file *file) |
2313 | { | |
2314 | struct snd_pcm *pcm; | |
02f4865f TI |
2315 | int err = nonseekable_open(inode, file); |
2316 | if (err < 0) | |
2317 | return err; | |
f87135f5 CL |
2318 | pcm = snd_lookup_minor_data(iminor(inode), |
2319 | SNDRV_DEVICE_TYPE_PCM_PLAYBACK); | |
a0830dbd | 2320 | err = snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_PLAYBACK); |
8bb4d9ce TI |
2321 | if (pcm) |
2322 | snd_card_unref(pcm->card); | |
a0830dbd | 2323 | return err; |
f87135f5 CL |
2324 | } |
2325 | ||
2326 | static int snd_pcm_capture_open(struct inode *inode, struct file *file) | |
1da177e4 | 2327 | { |
877211f5 | 2328 | struct snd_pcm *pcm; |
02f4865f TI |
2329 | int err = nonseekable_open(inode, file); |
2330 | if (err < 0) | |
2331 | return err; | |
f87135f5 CL |
2332 | pcm = snd_lookup_minor_data(iminor(inode), |
2333 | SNDRV_DEVICE_TYPE_PCM_CAPTURE); | |
a0830dbd | 2334 | err = snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_CAPTURE); |
8bb4d9ce TI |
2335 | if (pcm) |
2336 | snd_card_unref(pcm->card); | |
a0830dbd | 2337 | return err; |
f87135f5 CL |
2338 | } |
2339 | ||
2340 | static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream) | |
2341 | { | |
2342 | int err; | |
1da177e4 LT |
2343 | wait_queue_t wait; |
2344 | ||
1da177e4 LT |
2345 | if (pcm == NULL) { |
2346 | err = -ENODEV; | |
2347 | goto __error1; | |
2348 | } | |
2349 | err = snd_card_file_add(pcm->card, file); | |
2350 | if (err < 0) | |
2351 | goto __error1; | |
2352 | if (!try_module_get(pcm->card->module)) { | |
2353 | err = -EFAULT; | |
2354 | goto __error2; | |
2355 | } | |
2356 | init_waitqueue_entry(&wait, current); | |
2357 | add_wait_queue(&pcm->open_wait, &wait); | |
1a60d4c5 | 2358 | mutex_lock(&pcm->open_mutex); |
1da177e4 | 2359 | while (1) { |
ffd3d5c6 | 2360 | err = snd_pcm_open_file(file, pcm, stream); |
1da177e4 LT |
2361 | if (err >= 0) |
2362 | break; | |
2363 | if (err == -EAGAIN) { | |
2364 | if (file->f_flags & O_NONBLOCK) { | |
2365 | err = -EBUSY; | |
2366 | break; | |
2367 | } | |
2368 | } else | |
2369 | break; | |
2370 | set_current_state(TASK_INTERRUPTIBLE); | |
1a60d4c5 | 2371 | mutex_unlock(&pcm->open_mutex); |
1da177e4 | 2372 | schedule(); |
1a60d4c5 | 2373 | mutex_lock(&pcm->open_mutex); |
0914f796 TI |
2374 | if (pcm->card->shutdown) { |
2375 | err = -ENODEV; | |
2376 | break; | |
2377 | } | |
1da177e4 LT |
2378 | if (signal_pending(current)) { |
2379 | err = -ERESTARTSYS; | |
2380 | break; | |
2381 | } | |
2382 | } | |
2383 | remove_wait_queue(&pcm->open_wait, &wait); | |
1a60d4c5 | 2384 | mutex_unlock(&pcm->open_mutex); |
1da177e4 LT |
2385 | if (err < 0) |
2386 | goto __error; | |
2387 | return err; | |
2388 | ||
2389 | __error: | |
2390 | module_put(pcm->card->module); | |
2391 | __error2: | |
2392 | snd_card_file_remove(pcm->card, file); | |
2393 | __error1: | |
2394 | return err; | |
2395 | } | |
2396 | ||
2397 | static int snd_pcm_release(struct inode *inode, struct file *file) | |
2398 | { | |
877211f5 TI |
2399 | struct snd_pcm *pcm; |
2400 | struct snd_pcm_substream *substream; | |
2401 | struct snd_pcm_file *pcm_file; | |
1da177e4 LT |
2402 | |
2403 | pcm_file = file->private_data; | |
2404 | substream = pcm_file->substream; | |
7eaa943c TI |
2405 | if (snd_BUG_ON(!substream)) |
2406 | return -ENXIO; | |
1da177e4 | 2407 | pcm = substream->pcm; |
1a60d4c5 | 2408 | mutex_lock(&pcm->open_mutex); |
3bf75f9b | 2409 | snd_pcm_release_substream(substream); |
548a648b | 2410 | kfree(pcm_file); |
1a60d4c5 | 2411 | mutex_unlock(&pcm->open_mutex); |
1da177e4 LT |
2412 | wake_up(&pcm->open_wait); |
2413 | module_put(pcm->card->module); | |
2414 | snd_card_file_remove(pcm->card, file); | |
2415 | return 0; | |
2416 | } | |
2417 | ||
877211f5 TI |
2418 | static snd_pcm_sframes_t snd_pcm_playback_rewind(struct snd_pcm_substream *substream, |
2419 | snd_pcm_uframes_t frames) | |
1da177e4 | 2420 | { |
877211f5 | 2421 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
2422 | snd_pcm_sframes_t appl_ptr; |
2423 | snd_pcm_sframes_t ret; | |
2424 | snd_pcm_sframes_t hw_avail; | |
2425 | ||
2426 | if (frames == 0) | |
2427 | return 0; | |
2428 | ||
2429 | snd_pcm_stream_lock_irq(substream); | |
2430 | switch (runtime->status->state) { | |
2431 | case SNDRV_PCM_STATE_PREPARED: | |
2432 | break; | |
2433 | case SNDRV_PCM_STATE_DRAINING: | |
2434 | case SNDRV_PCM_STATE_RUNNING: | |
2435 | if (snd_pcm_update_hw_ptr(substream) >= 0) | |
2436 | break; | |
2437 | /* Fall through */ | |
2438 | case SNDRV_PCM_STATE_XRUN: | |
2439 | ret = -EPIPE; | |
2440 | goto __end; | |
51840409 LR |
2441 | case SNDRV_PCM_STATE_SUSPENDED: |
2442 | ret = -ESTRPIPE; | |
2443 | goto __end; | |
1da177e4 LT |
2444 | default: |
2445 | ret = -EBADFD; | |
2446 | goto __end; | |
2447 | } | |
2448 | ||
2449 | hw_avail = snd_pcm_playback_hw_avail(runtime); | |
2450 | if (hw_avail <= 0) { | |
2451 | ret = 0; | |
2452 | goto __end; | |
2453 | } | |
2454 | if (frames > (snd_pcm_uframes_t)hw_avail) | |
2455 | frames = hw_avail; | |
1da177e4 LT |
2456 | appl_ptr = runtime->control->appl_ptr - frames; |
2457 | if (appl_ptr < 0) | |
2458 | appl_ptr += runtime->boundary; | |
2459 | runtime->control->appl_ptr = appl_ptr; | |
1da177e4 LT |
2460 | ret = frames; |
2461 | __end: | |
2462 | snd_pcm_stream_unlock_irq(substream); | |
2463 | return ret; | |
2464 | } | |
2465 | ||
877211f5 TI |
2466 | static snd_pcm_sframes_t snd_pcm_capture_rewind(struct snd_pcm_substream *substream, |
2467 | snd_pcm_uframes_t frames) | |
1da177e4 | 2468 | { |
877211f5 | 2469 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
2470 | snd_pcm_sframes_t appl_ptr; |
2471 | snd_pcm_sframes_t ret; | |
2472 | snd_pcm_sframes_t hw_avail; | |
2473 | ||
2474 | if (frames == 0) | |
2475 | return 0; | |
2476 | ||
2477 | snd_pcm_stream_lock_irq(substream); | |
2478 | switch (runtime->status->state) { | |
2479 | case SNDRV_PCM_STATE_PREPARED: | |
2480 | case SNDRV_PCM_STATE_DRAINING: | |
2481 | break; | |
2482 | case SNDRV_PCM_STATE_RUNNING: | |
2483 | if (snd_pcm_update_hw_ptr(substream) >= 0) | |
2484 | break; | |
2485 | /* Fall through */ | |
2486 | case SNDRV_PCM_STATE_XRUN: | |
2487 | ret = -EPIPE; | |
2488 | goto __end; | |
51840409 LR |
2489 | case SNDRV_PCM_STATE_SUSPENDED: |
2490 | ret = -ESTRPIPE; | |
2491 | goto __end; | |
1da177e4 LT |
2492 | default: |
2493 | ret = -EBADFD; | |
2494 | goto __end; | |
2495 | } | |
2496 | ||
2497 | hw_avail = snd_pcm_capture_hw_avail(runtime); | |
2498 | if (hw_avail <= 0) { | |
2499 | ret = 0; | |
2500 | goto __end; | |
2501 | } | |
2502 | if (frames > (snd_pcm_uframes_t)hw_avail) | |
2503 | frames = hw_avail; | |
1da177e4 LT |
2504 | appl_ptr = runtime->control->appl_ptr - frames; |
2505 | if (appl_ptr < 0) | |
2506 | appl_ptr += runtime->boundary; | |
2507 | runtime->control->appl_ptr = appl_ptr; | |
1da177e4 LT |
2508 | ret = frames; |
2509 | __end: | |
2510 | snd_pcm_stream_unlock_irq(substream); | |
2511 | return ret; | |
2512 | } | |
2513 | ||
877211f5 TI |
2514 | static snd_pcm_sframes_t snd_pcm_playback_forward(struct snd_pcm_substream *substream, |
2515 | snd_pcm_uframes_t frames) | |
1da177e4 | 2516 | { |
877211f5 | 2517 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
2518 | snd_pcm_sframes_t appl_ptr; |
2519 | snd_pcm_sframes_t ret; | |
2520 | snd_pcm_sframes_t avail; | |
2521 | ||
2522 | if (frames == 0) | |
2523 | return 0; | |
2524 | ||
2525 | snd_pcm_stream_lock_irq(substream); | |
2526 | switch (runtime->status->state) { | |
2527 | case SNDRV_PCM_STATE_PREPARED: | |
2528 | case SNDRV_PCM_STATE_PAUSED: | |
2529 | break; | |
2530 | case SNDRV_PCM_STATE_DRAINING: | |
2531 | case SNDRV_PCM_STATE_RUNNING: | |
2532 | if (snd_pcm_update_hw_ptr(substream) >= 0) | |
2533 | break; | |
2534 | /* Fall through */ | |
2535 | case SNDRV_PCM_STATE_XRUN: | |
2536 | ret = -EPIPE; | |
2537 | goto __end; | |
51840409 LR |
2538 | case SNDRV_PCM_STATE_SUSPENDED: |
2539 | ret = -ESTRPIPE; | |
2540 | goto __end; | |
1da177e4 LT |
2541 | default: |
2542 | ret = -EBADFD; | |
2543 | goto __end; | |
2544 | } | |
2545 | ||
2546 | avail = snd_pcm_playback_avail(runtime); | |
2547 | if (avail <= 0) { | |
2548 | ret = 0; | |
2549 | goto __end; | |
2550 | } | |
2551 | if (frames > (snd_pcm_uframes_t)avail) | |
2552 | frames = avail; | |
1da177e4 LT |
2553 | appl_ptr = runtime->control->appl_ptr + frames; |
2554 | if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary) | |
2555 | appl_ptr -= runtime->boundary; | |
2556 | runtime->control->appl_ptr = appl_ptr; | |
1da177e4 LT |
2557 | ret = frames; |
2558 | __end: | |
2559 | snd_pcm_stream_unlock_irq(substream); | |
2560 | return ret; | |
2561 | } | |
2562 | ||
877211f5 TI |
2563 | static snd_pcm_sframes_t snd_pcm_capture_forward(struct snd_pcm_substream *substream, |
2564 | snd_pcm_uframes_t frames) | |
1da177e4 | 2565 | { |
877211f5 | 2566 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
2567 | snd_pcm_sframes_t appl_ptr; |
2568 | snd_pcm_sframes_t ret; | |
2569 | snd_pcm_sframes_t avail; | |
2570 | ||
2571 | if (frames == 0) | |
2572 | return 0; | |
2573 | ||
2574 | snd_pcm_stream_lock_irq(substream); | |
2575 | switch (runtime->status->state) { | |
2576 | case SNDRV_PCM_STATE_PREPARED: | |
2577 | case SNDRV_PCM_STATE_DRAINING: | |
2578 | case SNDRV_PCM_STATE_PAUSED: | |
2579 | break; | |
2580 | case SNDRV_PCM_STATE_RUNNING: | |
2581 | if (snd_pcm_update_hw_ptr(substream) >= 0) | |
2582 | break; | |
2583 | /* Fall through */ | |
2584 | case SNDRV_PCM_STATE_XRUN: | |
2585 | ret = -EPIPE; | |
2586 | goto __end; | |
51840409 LR |
2587 | case SNDRV_PCM_STATE_SUSPENDED: |
2588 | ret = -ESTRPIPE; | |
2589 | goto __end; | |
1da177e4 LT |
2590 | default: |
2591 | ret = -EBADFD; | |
2592 | goto __end; | |
2593 | } | |
2594 | ||
2595 | avail = snd_pcm_capture_avail(runtime); | |
2596 | if (avail <= 0) { | |
2597 | ret = 0; | |
2598 | goto __end; | |
2599 | } | |
2600 | if (frames > (snd_pcm_uframes_t)avail) | |
2601 | frames = avail; | |
1da177e4 LT |
2602 | appl_ptr = runtime->control->appl_ptr + frames; |
2603 | if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary) | |
2604 | appl_ptr -= runtime->boundary; | |
2605 | runtime->control->appl_ptr = appl_ptr; | |
1da177e4 LT |
2606 | ret = frames; |
2607 | __end: | |
2608 | snd_pcm_stream_unlock_irq(substream); | |
2609 | return ret; | |
2610 | } | |
2611 | ||
877211f5 | 2612 | static int snd_pcm_hwsync(struct snd_pcm_substream *substream) |
1da177e4 | 2613 | { |
877211f5 | 2614 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
2615 | int err; |
2616 | ||
2617 | snd_pcm_stream_lock_irq(substream); | |
2618 | switch (runtime->status->state) { | |
2619 | case SNDRV_PCM_STATE_DRAINING: | |
2620 | if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) | |
2621 | goto __badfd; | |
1f96153b | 2622 | /* Fall through */ |
1da177e4 LT |
2623 | case SNDRV_PCM_STATE_RUNNING: |
2624 | if ((err = snd_pcm_update_hw_ptr(substream)) < 0) | |
2625 | break; | |
2626 | /* Fall through */ | |
2627 | case SNDRV_PCM_STATE_PREPARED: | |
2628 | case SNDRV_PCM_STATE_SUSPENDED: | |
2629 | err = 0; | |
2630 | break; | |
2631 | case SNDRV_PCM_STATE_XRUN: | |
2632 | err = -EPIPE; | |
2633 | break; | |
2634 | default: | |
2635 | __badfd: | |
2636 | err = -EBADFD; | |
2637 | break; | |
2638 | } | |
2639 | snd_pcm_stream_unlock_irq(substream); | |
2640 | return err; | |
2641 | } | |
2642 | ||
877211f5 TI |
2643 | static int snd_pcm_delay(struct snd_pcm_substream *substream, |
2644 | snd_pcm_sframes_t __user *res) | |
1da177e4 | 2645 | { |
877211f5 | 2646 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
2647 | int err; |
2648 | snd_pcm_sframes_t n = 0; | |
2649 | ||
2650 | snd_pcm_stream_lock_irq(substream); | |
2651 | switch (runtime->status->state) { | |
2652 | case SNDRV_PCM_STATE_DRAINING: | |
2653 | if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) | |
2654 | goto __badfd; | |
1f96153b | 2655 | /* Fall through */ |
1da177e4 LT |
2656 | case SNDRV_PCM_STATE_RUNNING: |
2657 | if ((err = snd_pcm_update_hw_ptr(substream)) < 0) | |
2658 | break; | |
2659 | /* Fall through */ | |
2660 | case SNDRV_PCM_STATE_PREPARED: | |
2661 | case SNDRV_PCM_STATE_SUSPENDED: | |
2662 | err = 0; | |
2663 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) | |
2664 | n = snd_pcm_playback_hw_avail(runtime); | |
2665 | else | |
2666 | n = snd_pcm_capture_avail(runtime); | |
4bbe1ddf | 2667 | n += runtime->delay; |
1da177e4 LT |
2668 | break; |
2669 | case SNDRV_PCM_STATE_XRUN: | |
2670 | err = -EPIPE; | |
2671 | break; | |
2672 | default: | |
2673 | __badfd: | |
2674 | err = -EBADFD; | |
2675 | break; | |
2676 | } | |
2677 | snd_pcm_stream_unlock_irq(substream); | |
2678 | if (!err) | |
2679 | if (put_user(n, res)) | |
2680 | err = -EFAULT; | |
2681 | return err; | |
2682 | } | |
2683 | ||
877211f5 TI |
2684 | static int snd_pcm_sync_ptr(struct snd_pcm_substream *substream, |
2685 | struct snd_pcm_sync_ptr __user *_sync_ptr) | |
1da177e4 | 2686 | { |
877211f5 TI |
2687 | struct snd_pcm_runtime *runtime = substream->runtime; |
2688 | struct snd_pcm_sync_ptr sync_ptr; | |
2689 | volatile struct snd_pcm_mmap_status *status; | |
2690 | volatile struct snd_pcm_mmap_control *control; | |
1da177e4 LT |
2691 | int err; |
2692 | ||
2693 | memset(&sync_ptr, 0, sizeof(sync_ptr)); | |
2694 | if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags))) | |
2695 | return -EFAULT; | |
877211f5 | 2696 | if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct snd_pcm_mmap_control))) |
1da177e4 LT |
2697 | return -EFAULT; |
2698 | status = runtime->status; | |
2699 | control = runtime->control; | |
2700 | if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) { | |
2701 | err = snd_pcm_hwsync(substream); | |
2702 | if (err < 0) | |
2703 | return err; | |
2704 | } | |
2705 | snd_pcm_stream_lock_irq(substream); | |
2706 | if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL)) | |
2707 | control->appl_ptr = sync_ptr.c.control.appl_ptr; | |
2708 | else | |
2709 | sync_ptr.c.control.appl_ptr = control->appl_ptr; | |
2710 | if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN)) | |
2711 | control->avail_min = sync_ptr.c.control.avail_min; | |
2712 | else | |
2713 | sync_ptr.c.control.avail_min = control->avail_min; | |
2714 | sync_ptr.s.status.state = status->state; | |
2715 | sync_ptr.s.status.hw_ptr = status->hw_ptr; | |
2716 | sync_ptr.s.status.tstamp = status->tstamp; | |
2717 | sync_ptr.s.status.suspended_state = status->suspended_state; | |
2718 | snd_pcm_stream_unlock_irq(substream); | |
2719 | if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr))) | |
2720 | return -EFAULT; | |
2721 | return 0; | |
2722 | } | |
b751eef1 JK |
2723 | |
2724 | static int snd_pcm_tstamp(struct snd_pcm_substream *substream, int __user *_arg) | |
2725 | { | |
2726 | struct snd_pcm_runtime *runtime = substream->runtime; | |
2727 | int arg; | |
2728 | ||
2729 | if (get_user(arg, _arg)) | |
2730 | return -EFAULT; | |
2731 | if (arg < 0 || arg > SNDRV_PCM_TSTAMP_TYPE_LAST) | |
2732 | return -EINVAL; | |
2408c219 | 2733 | runtime->tstamp_type = arg; |
b751eef1 JK |
2734 | return 0; |
2735 | } | |
1da177e4 | 2736 | |
0df63e44 TI |
2737 | static int snd_pcm_common_ioctl1(struct file *file, |
2738 | struct snd_pcm_substream *substream, | |
1da177e4 LT |
2739 | unsigned int cmd, void __user *arg) |
2740 | { | |
1da177e4 LT |
2741 | switch (cmd) { |
2742 | case SNDRV_PCM_IOCTL_PVERSION: | |
2743 | return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0; | |
2744 | case SNDRV_PCM_IOCTL_INFO: | |
2745 | return snd_pcm_info_user(substream, arg); | |
28e9e473 JK |
2746 | case SNDRV_PCM_IOCTL_TSTAMP: /* just for compatibility */ |
2747 | return 0; | |
b751eef1 JK |
2748 | case SNDRV_PCM_IOCTL_TTSTAMP: |
2749 | return snd_pcm_tstamp(substream, arg); | |
1da177e4 LT |
2750 | case SNDRV_PCM_IOCTL_HW_REFINE: |
2751 | return snd_pcm_hw_refine_user(substream, arg); | |
2752 | case SNDRV_PCM_IOCTL_HW_PARAMS: | |
2753 | return snd_pcm_hw_params_user(substream, arg); | |
2754 | case SNDRV_PCM_IOCTL_HW_FREE: | |
2755 | return snd_pcm_hw_free(substream); | |
2756 | case SNDRV_PCM_IOCTL_SW_PARAMS: | |
2757 | return snd_pcm_sw_params_user(substream, arg); | |
2758 | case SNDRV_PCM_IOCTL_STATUS: | |
38ca2a4d PLB |
2759 | return snd_pcm_status_user(substream, arg, false); |
2760 | case SNDRV_PCM_IOCTL_STATUS_EXT: | |
2761 | return snd_pcm_status_user(substream, arg, true); | |
1da177e4 LT |
2762 | case SNDRV_PCM_IOCTL_CHANNEL_INFO: |
2763 | return snd_pcm_channel_info_user(substream, arg); | |
2764 | case SNDRV_PCM_IOCTL_PREPARE: | |
0df63e44 | 2765 | return snd_pcm_prepare(substream, file); |
1da177e4 LT |
2766 | case SNDRV_PCM_IOCTL_RESET: |
2767 | return snd_pcm_reset(substream); | |
2768 | case SNDRV_PCM_IOCTL_START: | |
2769 | return snd_pcm_action_lock_irq(&snd_pcm_action_start, substream, SNDRV_PCM_STATE_RUNNING); | |
2770 | case SNDRV_PCM_IOCTL_LINK: | |
2771 | return snd_pcm_link(substream, (int)(unsigned long) arg); | |
2772 | case SNDRV_PCM_IOCTL_UNLINK: | |
2773 | return snd_pcm_unlink(substream); | |
2774 | case SNDRV_PCM_IOCTL_RESUME: | |
2775 | return snd_pcm_resume(substream); | |
2776 | case SNDRV_PCM_IOCTL_XRUN: | |
2777 | return snd_pcm_xrun(substream); | |
2778 | case SNDRV_PCM_IOCTL_HWSYNC: | |
2779 | return snd_pcm_hwsync(substream); | |
2780 | case SNDRV_PCM_IOCTL_DELAY: | |
2781 | return snd_pcm_delay(substream, arg); | |
2782 | case SNDRV_PCM_IOCTL_SYNC_PTR: | |
2783 | return snd_pcm_sync_ptr(substream, arg); | |
59d48582 | 2784 | #ifdef CONFIG_SND_SUPPORT_OLD_API |
1da177e4 LT |
2785 | case SNDRV_PCM_IOCTL_HW_REFINE_OLD: |
2786 | return snd_pcm_hw_refine_old_user(substream, arg); | |
2787 | case SNDRV_PCM_IOCTL_HW_PARAMS_OLD: | |
2788 | return snd_pcm_hw_params_old_user(substream, arg); | |
59d48582 | 2789 | #endif |
1da177e4 | 2790 | case SNDRV_PCM_IOCTL_DRAIN: |
4cdc115f | 2791 | return snd_pcm_drain(substream, file); |
1da177e4 LT |
2792 | case SNDRV_PCM_IOCTL_DROP: |
2793 | return snd_pcm_drop(substream); | |
e661d0dd TI |
2794 | case SNDRV_PCM_IOCTL_PAUSE: |
2795 | { | |
2796 | int res; | |
2797 | snd_pcm_stream_lock_irq(substream); | |
2798 | res = snd_pcm_pause(substream, (int)(unsigned long)arg); | |
2799 | snd_pcm_stream_unlock_irq(substream); | |
2800 | return res; | |
2801 | } | |
1da177e4 | 2802 | } |
09e56df8 | 2803 | pcm_dbg(substream->pcm, "unknown ioctl = 0x%x\n", cmd); |
1da177e4 LT |
2804 | return -ENOTTY; |
2805 | } | |
2806 | ||
0df63e44 TI |
2807 | static int snd_pcm_playback_ioctl1(struct file *file, |
2808 | struct snd_pcm_substream *substream, | |
1da177e4 LT |
2809 | unsigned int cmd, void __user *arg) |
2810 | { | |
7eaa943c TI |
2811 | if (snd_BUG_ON(!substream)) |
2812 | return -ENXIO; | |
2813 | if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_PLAYBACK)) | |
2814 | return -EINVAL; | |
1da177e4 LT |
2815 | switch (cmd) { |
2816 | case SNDRV_PCM_IOCTL_WRITEI_FRAMES: | |
2817 | { | |
877211f5 TI |
2818 | struct snd_xferi xferi; |
2819 | struct snd_xferi __user *_xferi = arg; | |
2820 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1da177e4 LT |
2821 | snd_pcm_sframes_t result; |
2822 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) | |
2823 | return -EBADFD; | |
2824 | if (put_user(0, &_xferi->result)) | |
2825 | return -EFAULT; | |
2826 | if (copy_from_user(&xferi, _xferi, sizeof(xferi))) | |
2827 | return -EFAULT; | |
2828 | result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames); | |
2829 | __put_user(result, &_xferi->result); | |
2830 | return result < 0 ? result : 0; | |
2831 | } | |
2832 | case SNDRV_PCM_IOCTL_WRITEN_FRAMES: | |
2833 | { | |
877211f5 TI |
2834 | struct snd_xfern xfern; |
2835 | struct snd_xfern __user *_xfern = arg; | |
2836 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1da177e4 LT |
2837 | void __user **bufs; |
2838 | snd_pcm_sframes_t result; | |
2839 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) | |
2840 | return -EBADFD; | |
2841 | if (runtime->channels > 128) | |
2842 | return -EINVAL; | |
2843 | if (put_user(0, &_xfern->result)) | |
2844 | return -EFAULT; | |
2845 | if (copy_from_user(&xfern, _xfern, sizeof(xfern))) | |
2846 | return -EFAULT; | |
ef44a1ec LZ |
2847 | |
2848 | bufs = memdup_user(xfern.bufs, | |
2849 | sizeof(void *) * runtime->channels); | |
2850 | if (IS_ERR(bufs)) | |
2851 | return PTR_ERR(bufs); | |
1da177e4 LT |
2852 | result = snd_pcm_lib_writev(substream, bufs, xfern.frames); |
2853 | kfree(bufs); | |
2854 | __put_user(result, &_xfern->result); | |
2855 | return result < 0 ? result : 0; | |
2856 | } | |
2857 | case SNDRV_PCM_IOCTL_REWIND: | |
2858 | { | |
2859 | snd_pcm_uframes_t frames; | |
2860 | snd_pcm_uframes_t __user *_frames = arg; | |
2861 | snd_pcm_sframes_t result; | |
2862 | if (get_user(frames, _frames)) | |
2863 | return -EFAULT; | |
2864 | if (put_user(0, _frames)) | |
2865 | return -EFAULT; | |
2866 | result = snd_pcm_playback_rewind(substream, frames); | |
2867 | __put_user(result, _frames); | |
2868 | return result < 0 ? result : 0; | |
2869 | } | |
2870 | case SNDRV_PCM_IOCTL_FORWARD: | |
2871 | { | |
2872 | snd_pcm_uframes_t frames; | |
2873 | snd_pcm_uframes_t __user *_frames = arg; | |
2874 | snd_pcm_sframes_t result; | |
2875 | if (get_user(frames, _frames)) | |
2876 | return -EFAULT; | |
2877 | if (put_user(0, _frames)) | |
2878 | return -EFAULT; | |
2879 | result = snd_pcm_playback_forward(substream, frames); | |
2880 | __put_user(result, _frames); | |
2881 | return result < 0 ? result : 0; | |
2882 | } | |
1da177e4 | 2883 | } |
0df63e44 | 2884 | return snd_pcm_common_ioctl1(file, substream, cmd, arg); |
1da177e4 LT |
2885 | } |
2886 | ||
0df63e44 TI |
2887 | static int snd_pcm_capture_ioctl1(struct file *file, |
2888 | struct snd_pcm_substream *substream, | |
1da177e4 LT |
2889 | unsigned int cmd, void __user *arg) |
2890 | { | |
7eaa943c TI |
2891 | if (snd_BUG_ON(!substream)) |
2892 | return -ENXIO; | |
2893 | if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_CAPTURE)) | |
2894 | return -EINVAL; | |
1da177e4 LT |
2895 | switch (cmd) { |
2896 | case SNDRV_PCM_IOCTL_READI_FRAMES: | |
2897 | { | |
877211f5 TI |
2898 | struct snd_xferi xferi; |
2899 | struct snd_xferi __user *_xferi = arg; | |
2900 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1da177e4 LT |
2901 | snd_pcm_sframes_t result; |
2902 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) | |
2903 | return -EBADFD; | |
2904 | if (put_user(0, &_xferi->result)) | |
2905 | return -EFAULT; | |
2906 | if (copy_from_user(&xferi, _xferi, sizeof(xferi))) | |
2907 | return -EFAULT; | |
2908 | result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames); | |
2909 | __put_user(result, &_xferi->result); | |
2910 | return result < 0 ? result : 0; | |
2911 | } | |
2912 | case SNDRV_PCM_IOCTL_READN_FRAMES: | |
2913 | { | |
877211f5 TI |
2914 | struct snd_xfern xfern; |
2915 | struct snd_xfern __user *_xfern = arg; | |
2916 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1da177e4 LT |
2917 | void *bufs; |
2918 | snd_pcm_sframes_t result; | |
2919 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) | |
2920 | return -EBADFD; | |
2921 | if (runtime->channels > 128) | |
2922 | return -EINVAL; | |
2923 | if (put_user(0, &_xfern->result)) | |
2924 | return -EFAULT; | |
2925 | if (copy_from_user(&xfern, _xfern, sizeof(xfern))) | |
2926 | return -EFAULT; | |
ef44a1ec LZ |
2927 | |
2928 | bufs = memdup_user(xfern.bufs, | |
2929 | sizeof(void *) * runtime->channels); | |
2930 | if (IS_ERR(bufs)) | |
2931 | return PTR_ERR(bufs); | |
1da177e4 LT |
2932 | result = snd_pcm_lib_readv(substream, bufs, xfern.frames); |
2933 | kfree(bufs); | |
2934 | __put_user(result, &_xfern->result); | |
2935 | return result < 0 ? result : 0; | |
2936 | } | |
2937 | case SNDRV_PCM_IOCTL_REWIND: | |
2938 | { | |
2939 | snd_pcm_uframes_t frames; | |
2940 | snd_pcm_uframes_t __user *_frames = arg; | |
2941 | snd_pcm_sframes_t result; | |
2942 | if (get_user(frames, _frames)) | |
2943 | return -EFAULT; | |
2944 | if (put_user(0, _frames)) | |
2945 | return -EFAULT; | |
2946 | result = snd_pcm_capture_rewind(substream, frames); | |
2947 | __put_user(result, _frames); | |
2948 | return result < 0 ? result : 0; | |
2949 | } | |
2950 | case SNDRV_PCM_IOCTL_FORWARD: | |
2951 | { | |
2952 | snd_pcm_uframes_t frames; | |
2953 | snd_pcm_uframes_t __user *_frames = arg; | |
2954 | snd_pcm_sframes_t result; | |
2955 | if (get_user(frames, _frames)) | |
2956 | return -EFAULT; | |
2957 | if (put_user(0, _frames)) | |
2958 | return -EFAULT; | |
2959 | result = snd_pcm_capture_forward(substream, frames); | |
2960 | __put_user(result, _frames); | |
2961 | return result < 0 ? result : 0; | |
2962 | } | |
2963 | } | |
0df63e44 | 2964 | return snd_pcm_common_ioctl1(file, substream, cmd, arg); |
1da177e4 LT |
2965 | } |
2966 | ||
877211f5 TI |
2967 | static long snd_pcm_playback_ioctl(struct file *file, unsigned int cmd, |
2968 | unsigned long arg) | |
1da177e4 | 2969 | { |
877211f5 | 2970 | struct snd_pcm_file *pcm_file; |
1da177e4 LT |
2971 | |
2972 | pcm_file = file->private_data; | |
2973 | ||
2974 | if (((cmd >> 8) & 0xff) != 'A') | |
2975 | return -ENOTTY; | |
2976 | ||
0df63e44 TI |
2977 | return snd_pcm_playback_ioctl1(file, pcm_file->substream, cmd, |
2978 | (void __user *)arg); | |
1da177e4 LT |
2979 | } |
2980 | ||
877211f5 TI |
2981 | static long snd_pcm_capture_ioctl(struct file *file, unsigned int cmd, |
2982 | unsigned long arg) | |
1da177e4 | 2983 | { |
877211f5 | 2984 | struct snd_pcm_file *pcm_file; |
1da177e4 LT |
2985 | |
2986 | pcm_file = file->private_data; | |
2987 | ||
2988 | if (((cmd >> 8) & 0xff) != 'A') | |
2989 | return -ENOTTY; | |
2990 | ||
0df63e44 TI |
2991 | return snd_pcm_capture_ioctl1(file, pcm_file->substream, cmd, |
2992 | (void __user *)arg); | |
1da177e4 LT |
2993 | } |
2994 | ||
bf1bbb5a TI |
2995 | int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream, |
2996 | unsigned int cmd, void *arg) | |
1da177e4 LT |
2997 | { |
2998 | mm_segment_t fs; | |
2999 | int result; | |
3000 | ||
3001 | fs = snd_enter_user(); | |
1da177e4 LT |
3002 | switch (substream->stream) { |
3003 | case SNDRV_PCM_STREAM_PLAYBACK: | |
0df63e44 TI |
3004 | result = snd_pcm_playback_ioctl1(NULL, substream, cmd, |
3005 | (void __user *)arg); | |
bf1bbb5a | 3006 | break; |
1da177e4 | 3007 | case SNDRV_PCM_STREAM_CAPTURE: |
0df63e44 TI |
3008 | result = snd_pcm_capture_ioctl1(NULL, substream, cmd, |
3009 | (void __user *)arg); | |
bf1bbb5a | 3010 | break; |
1da177e4 | 3011 | default: |
bf1bbb5a TI |
3012 | result = -EINVAL; |
3013 | break; | |
1da177e4 | 3014 | } |
bf1bbb5a TI |
3015 | snd_leave_user(fs); |
3016 | return result; | |
1da177e4 LT |
3017 | } |
3018 | ||
e88e8ae6 TI |
3019 | EXPORT_SYMBOL(snd_pcm_kernel_ioctl); |
3020 | ||
877211f5 TI |
3021 | static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count, |
3022 | loff_t * offset) | |
1da177e4 | 3023 | { |
877211f5 TI |
3024 | struct snd_pcm_file *pcm_file; |
3025 | struct snd_pcm_substream *substream; | |
3026 | struct snd_pcm_runtime *runtime; | |
1da177e4 LT |
3027 | snd_pcm_sframes_t result; |
3028 | ||
3029 | pcm_file = file->private_data; | |
3030 | substream = pcm_file->substream; | |
7eaa943c TI |
3031 | if (PCM_RUNTIME_CHECK(substream)) |
3032 | return -ENXIO; | |
1da177e4 LT |
3033 | runtime = substream->runtime; |
3034 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) | |
3035 | return -EBADFD; | |
3036 | if (!frame_aligned(runtime, count)) | |
3037 | return -EINVAL; | |
3038 | count = bytes_to_frames(runtime, count); | |
3039 | result = snd_pcm_lib_read(substream, buf, count); | |
3040 | if (result > 0) | |
3041 | result = frames_to_bytes(runtime, result); | |
3042 | return result; | |
3043 | } | |
3044 | ||
877211f5 TI |
3045 | static ssize_t snd_pcm_write(struct file *file, const char __user *buf, |
3046 | size_t count, loff_t * offset) | |
1da177e4 | 3047 | { |
877211f5 TI |
3048 | struct snd_pcm_file *pcm_file; |
3049 | struct snd_pcm_substream *substream; | |
3050 | struct snd_pcm_runtime *runtime; | |
1da177e4 LT |
3051 | snd_pcm_sframes_t result; |
3052 | ||
3053 | pcm_file = file->private_data; | |
3054 | substream = pcm_file->substream; | |
7eaa943c TI |
3055 | if (PCM_RUNTIME_CHECK(substream)) |
3056 | return -ENXIO; | |
1da177e4 | 3057 | runtime = substream->runtime; |
7eaa943c TI |
3058 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) |
3059 | return -EBADFD; | |
3060 | if (!frame_aligned(runtime, count)) | |
3061 | return -EINVAL; | |
1da177e4 LT |
3062 | count = bytes_to_frames(runtime, count); |
3063 | result = snd_pcm_lib_write(substream, buf, count); | |
3064 | if (result > 0) | |
3065 | result = frames_to_bytes(runtime, result); | |
1da177e4 LT |
3066 | return result; |
3067 | } | |
3068 | ||
1c65d986 | 3069 | static ssize_t snd_pcm_readv(struct kiocb *iocb, struct iov_iter *to) |
1da177e4 | 3070 | { |
877211f5 TI |
3071 | struct snd_pcm_file *pcm_file; |
3072 | struct snd_pcm_substream *substream; | |
3073 | struct snd_pcm_runtime *runtime; | |
1da177e4 LT |
3074 | snd_pcm_sframes_t result; |
3075 | unsigned long i; | |
3076 | void __user **bufs; | |
3077 | snd_pcm_uframes_t frames; | |
3078 | ||
ee0b3e67 | 3079 | pcm_file = iocb->ki_filp->private_data; |
1da177e4 | 3080 | substream = pcm_file->substream; |
7eaa943c TI |
3081 | if (PCM_RUNTIME_CHECK(substream)) |
3082 | return -ENXIO; | |
1da177e4 LT |
3083 | runtime = substream->runtime; |
3084 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) | |
3085 | return -EBADFD; | |
1c65d986 AV |
3086 | if (!iter_is_iovec(to)) |
3087 | return -EINVAL; | |
3088 | if (to->nr_segs > 1024 || to->nr_segs != runtime->channels) | |
1da177e4 | 3089 | return -EINVAL; |
1c65d986 | 3090 | if (!frame_aligned(runtime, to->iov->iov_len)) |
1da177e4 | 3091 | return -EINVAL; |
1c65d986 AV |
3092 | frames = bytes_to_samples(runtime, to->iov->iov_len); |
3093 | bufs = kmalloc(sizeof(void *) * to->nr_segs, GFP_KERNEL); | |
1da177e4 LT |
3094 | if (bufs == NULL) |
3095 | return -ENOMEM; | |
1c65d986 AV |
3096 | for (i = 0; i < to->nr_segs; ++i) |
3097 | bufs[i] = to->iov[i].iov_base; | |
1da177e4 LT |
3098 | result = snd_pcm_lib_readv(substream, bufs, frames); |
3099 | if (result > 0) | |
3100 | result = frames_to_bytes(runtime, result); | |
3101 | kfree(bufs); | |
3102 | return result; | |
3103 | } | |
3104 | ||
1c65d986 | 3105 | static ssize_t snd_pcm_writev(struct kiocb *iocb, struct iov_iter *from) |
1da177e4 | 3106 | { |
877211f5 TI |
3107 | struct snd_pcm_file *pcm_file; |
3108 | struct snd_pcm_substream *substream; | |
3109 | struct snd_pcm_runtime *runtime; | |
1da177e4 LT |
3110 | snd_pcm_sframes_t result; |
3111 | unsigned long i; | |
3112 | void __user **bufs; | |
3113 | snd_pcm_uframes_t frames; | |
3114 | ||
ee0b3e67 | 3115 | pcm_file = iocb->ki_filp->private_data; |
1da177e4 | 3116 | substream = pcm_file->substream; |
7eaa943c TI |
3117 | if (PCM_RUNTIME_CHECK(substream)) |
3118 | return -ENXIO; | |
1da177e4 | 3119 | runtime = substream->runtime; |
7eaa943c TI |
3120 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) |
3121 | return -EBADFD; | |
1c65d986 AV |
3122 | if (!iter_is_iovec(from)) |
3123 | return -EINVAL; | |
3124 | if (from->nr_segs > 128 || from->nr_segs != runtime->channels || | |
3125 | !frame_aligned(runtime, from->iov->iov_len)) | |
7eaa943c | 3126 | return -EINVAL; |
1c65d986 AV |
3127 | frames = bytes_to_samples(runtime, from->iov->iov_len); |
3128 | bufs = kmalloc(sizeof(void *) * from->nr_segs, GFP_KERNEL); | |
1da177e4 LT |
3129 | if (bufs == NULL) |
3130 | return -ENOMEM; | |
1c65d986 AV |
3131 | for (i = 0; i < from->nr_segs; ++i) |
3132 | bufs[i] = from->iov[i].iov_base; | |
1da177e4 LT |
3133 | result = snd_pcm_lib_writev(substream, bufs, frames); |
3134 | if (result > 0) | |
3135 | result = frames_to_bytes(runtime, result); | |
3136 | kfree(bufs); | |
1da177e4 LT |
3137 | return result; |
3138 | } | |
3139 | ||
3140 | static unsigned int snd_pcm_playback_poll(struct file *file, poll_table * wait) | |
3141 | { | |
877211f5 TI |
3142 | struct snd_pcm_file *pcm_file; |
3143 | struct snd_pcm_substream *substream; | |
3144 | struct snd_pcm_runtime *runtime; | |
1da177e4 LT |
3145 | unsigned int mask; |
3146 | snd_pcm_uframes_t avail; | |
3147 | ||
3148 | pcm_file = file->private_data; | |
3149 | ||
3150 | substream = pcm_file->substream; | |
7eaa943c TI |
3151 | if (PCM_RUNTIME_CHECK(substream)) |
3152 | return -ENXIO; | |
1da177e4 LT |
3153 | runtime = substream->runtime; |
3154 | ||
3155 | poll_wait(file, &runtime->sleep, wait); | |
3156 | ||
3157 | snd_pcm_stream_lock_irq(substream); | |
3158 | avail = snd_pcm_playback_avail(runtime); | |
3159 | switch (runtime->status->state) { | |
3160 | case SNDRV_PCM_STATE_RUNNING: | |
3161 | case SNDRV_PCM_STATE_PREPARED: | |
3162 | case SNDRV_PCM_STATE_PAUSED: | |
3163 | if (avail >= runtime->control->avail_min) { | |
3164 | mask = POLLOUT | POLLWRNORM; | |
3165 | break; | |
3166 | } | |
3167 | /* Fall through */ | |
3168 | case SNDRV_PCM_STATE_DRAINING: | |
3169 | mask = 0; | |
3170 | break; | |
3171 | default: | |
3172 | mask = POLLOUT | POLLWRNORM | POLLERR; | |
3173 | break; | |
3174 | } | |
3175 | snd_pcm_stream_unlock_irq(substream); | |
3176 | return mask; | |
3177 | } | |
3178 | ||
3179 | static unsigned int snd_pcm_capture_poll(struct file *file, poll_table * wait) | |
3180 | { | |
877211f5 TI |
3181 | struct snd_pcm_file *pcm_file; |
3182 | struct snd_pcm_substream *substream; | |
3183 | struct snd_pcm_runtime *runtime; | |
1da177e4 LT |
3184 | unsigned int mask; |
3185 | snd_pcm_uframes_t avail; | |
3186 | ||
3187 | pcm_file = file->private_data; | |
3188 | ||
3189 | substream = pcm_file->substream; | |
7eaa943c TI |
3190 | if (PCM_RUNTIME_CHECK(substream)) |
3191 | return -ENXIO; | |
1da177e4 LT |
3192 | runtime = substream->runtime; |
3193 | ||
3194 | poll_wait(file, &runtime->sleep, wait); | |
3195 | ||
3196 | snd_pcm_stream_lock_irq(substream); | |
3197 | avail = snd_pcm_capture_avail(runtime); | |
3198 | switch (runtime->status->state) { | |
3199 | case SNDRV_PCM_STATE_RUNNING: | |
3200 | case SNDRV_PCM_STATE_PREPARED: | |
3201 | case SNDRV_PCM_STATE_PAUSED: | |
3202 | if (avail >= runtime->control->avail_min) { | |
3203 | mask = POLLIN | POLLRDNORM; | |
3204 | break; | |
3205 | } | |
3206 | mask = 0; | |
3207 | break; | |
3208 | case SNDRV_PCM_STATE_DRAINING: | |
3209 | if (avail > 0) { | |
3210 | mask = POLLIN | POLLRDNORM; | |
3211 | break; | |
3212 | } | |
3213 | /* Fall through */ | |
3214 | default: | |
3215 | mask = POLLIN | POLLRDNORM | POLLERR; | |
3216 | break; | |
3217 | } | |
3218 | snd_pcm_stream_unlock_irq(substream); | |
3219 | return mask; | |
3220 | } | |
3221 | ||
3222 | /* | |
3223 | * mmap support | |
3224 | */ | |
3225 | ||
3226 | /* | |
3227 | * Only on coherent architectures, we can mmap the status and the control records | |
3228 | * for effcient data transfer. On others, we have to use HWSYNC ioctl... | |
3229 | */ | |
3230 | #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA) | |
3231 | /* | |
3232 | * mmap status record | |
3233 | */ | |
3ad5afcd NP |
3234 | static int snd_pcm_mmap_status_fault(struct vm_area_struct *area, |
3235 | struct vm_fault *vmf) | |
1da177e4 | 3236 | { |
877211f5 TI |
3237 | struct snd_pcm_substream *substream = area->vm_private_data; |
3238 | struct snd_pcm_runtime *runtime; | |
1da177e4 LT |
3239 | |
3240 | if (substream == NULL) | |
3ad5afcd | 3241 | return VM_FAULT_SIGBUS; |
1da177e4 | 3242 | runtime = substream->runtime; |
3ad5afcd NP |
3243 | vmf->page = virt_to_page(runtime->status); |
3244 | get_page(vmf->page); | |
3245 | return 0; | |
1da177e4 LT |
3246 | } |
3247 | ||
f0f37e2f | 3248 | static const struct vm_operations_struct snd_pcm_vm_ops_status = |
1da177e4 | 3249 | { |
3ad5afcd | 3250 | .fault = snd_pcm_mmap_status_fault, |
1da177e4 LT |
3251 | }; |
3252 | ||
877211f5 | 3253 | static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file, |
1da177e4 LT |
3254 | struct vm_area_struct *area) |
3255 | { | |
1da177e4 LT |
3256 | long size; |
3257 | if (!(area->vm_flags & VM_READ)) | |
3258 | return -EINVAL; | |
1da177e4 | 3259 | size = area->vm_end - area->vm_start; |
877211f5 | 3260 | if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status))) |
1da177e4 LT |
3261 | return -EINVAL; |
3262 | area->vm_ops = &snd_pcm_vm_ops_status; | |
3263 | area->vm_private_data = substream; | |
314e51b9 | 3264 | area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP; |
1da177e4 LT |
3265 | return 0; |
3266 | } | |
3267 | ||
3268 | /* | |
3269 | * mmap control record | |
3270 | */ | |
3ad5afcd NP |
3271 | static int snd_pcm_mmap_control_fault(struct vm_area_struct *area, |
3272 | struct vm_fault *vmf) | |
1da177e4 | 3273 | { |
877211f5 TI |
3274 | struct snd_pcm_substream *substream = area->vm_private_data; |
3275 | struct snd_pcm_runtime *runtime; | |
1da177e4 LT |
3276 | |
3277 | if (substream == NULL) | |
3ad5afcd | 3278 | return VM_FAULT_SIGBUS; |
1da177e4 | 3279 | runtime = substream->runtime; |
3ad5afcd NP |
3280 | vmf->page = virt_to_page(runtime->control); |
3281 | get_page(vmf->page); | |
3282 | return 0; | |
1da177e4 LT |
3283 | } |
3284 | ||
f0f37e2f | 3285 | static const struct vm_operations_struct snd_pcm_vm_ops_control = |
1da177e4 | 3286 | { |
3ad5afcd | 3287 | .fault = snd_pcm_mmap_control_fault, |
1da177e4 LT |
3288 | }; |
3289 | ||
877211f5 | 3290 | static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file, |
1da177e4 LT |
3291 | struct vm_area_struct *area) |
3292 | { | |
1da177e4 LT |
3293 | long size; |
3294 | if (!(area->vm_flags & VM_READ)) | |
3295 | return -EINVAL; | |
1da177e4 | 3296 | size = area->vm_end - area->vm_start; |
877211f5 | 3297 | if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control))) |
1da177e4 LT |
3298 | return -EINVAL; |
3299 | area->vm_ops = &snd_pcm_vm_ops_control; | |
3300 | area->vm_private_data = substream; | |
314e51b9 | 3301 | area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP; |
1da177e4 LT |
3302 | return 0; |
3303 | } | |
3304 | #else /* ! coherent mmap */ | |
3305 | /* | |
3306 | * don't support mmap for status and control records. | |
3307 | */ | |
877211f5 | 3308 | static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file, |
1da177e4 LT |
3309 | struct vm_area_struct *area) |
3310 | { | |
3311 | return -ENXIO; | |
3312 | } | |
877211f5 | 3313 | static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file, |
1da177e4 LT |
3314 | struct vm_area_struct *area) |
3315 | { | |
3316 | return -ENXIO; | |
3317 | } | |
3318 | #endif /* coherent mmap */ | |
3319 | ||
9eb4a067 TI |
3320 | static inline struct page * |
3321 | snd_pcm_default_page_ops(struct snd_pcm_substream *substream, unsigned long ofs) | |
3322 | { | |
3323 | void *vaddr = substream->runtime->dma_area + ofs; | |
3324 | return virt_to_page(vaddr); | |
3325 | } | |
3326 | ||
1da177e4 | 3327 | /* |
3ad5afcd | 3328 | * fault callback for mmapping a RAM page |
1da177e4 | 3329 | */ |
3ad5afcd NP |
3330 | static int snd_pcm_mmap_data_fault(struct vm_area_struct *area, |
3331 | struct vm_fault *vmf) | |
1da177e4 | 3332 | { |
877211f5 TI |
3333 | struct snd_pcm_substream *substream = area->vm_private_data; |
3334 | struct snd_pcm_runtime *runtime; | |
1da177e4 LT |
3335 | unsigned long offset; |
3336 | struct page * page; | |
1da177e4 LT |
3337 | size_t dma_bytes; |
3338 | ||
3339 | if (substream == NULL) | |
3ad5afcd | 3340 | return VM_FAULT_SIGBUS; |
1da177e4 | 3341 | runtime = substream->runtime; |
3ad5afcd | 3342 | offset = vmf->pgoff << PAGE_SHIFT; |
1da177e4 LT |
3343 | dma_bytes = PAGE_ALIGN(runtime->dma_bytes); |
3344 | if (offset > dma_bytes - PAGE_SIZE) | |
3ad5afcd | 3345 | return VM_FAULT_SIGBUS; |
9eb4a067 | 3346 | if (substream->ops->page) |
1da177e4 | 3347 | page = substream->ops->page(substream, offset); |
9eb4a067 TI |
3348 | else |
3349 | page = snd_pcm_default_page_ops(substream, offset); | |
3350 | if (!page) | |
3351 | return VM_FAULT_SIGBUS; | |
b5810039 | 3352 | get_page(page); |
3ad5afcd NP |
3353 | vmf->page = page; |
3354 | return 0; | |
1da177e4 LT |
3355 | } |
3356 | ||
657b1989 TI |
3357 | static const struct vm_operations_struct snd_pcm_vm_ops_data = { |
3358 | .open = snd_pcm_mmap_data_open, | |
3359 | .close = snd_pcm_mmap_data_close, | |
3360 | }; | |
3361 | ||
3362 | static const struct vm_operations_struct snd_pcm_vm_ops_data_fault = { | |
1da177e4 LT |
3363 | .open = snd_pcm_mmap_data_open, |
3364 | .close = snd_pcm_mmap_data_close, | |
3ad5afcd | 3365 | .fault = snd_pcm_mmap_data_fault, |
1da177e4 LT |
3366 | }; |
3367 | ||
3368 | /* | |
3369 | * mmap the DMA buffer on RAM | |
3370 | */ | |
30b771cf TI |
3371 | |
3372 | /** | |
3373 | * snd_pcm_lib_default_mmap - Default PCM data mmap function | |
3374 | * @substream: PCM substream | |
3375 | * @area: VMA | |
3376 | * | |
3377 | * This is the default mmap handler for PCM data. When mmap pcm_ops is NULL, | |
3378 | * this function is invoked implicitly. | |
3379 | */ | |
18a2b962 TI |
3380 | int snd_pcm_lib_default_mmap(struct snd_pcm_substream *substream, |
3381 | struct vm_area_struct *area) | |
1da177e4 | 3382 | { |
314e51b9 | 3383 | area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP; |
a5606f85 | 3384 | #ifdef CONFIG_GENERIC_ALLOCATOR |
05503214 NC |
3385 | if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV_IRAM) { |
3386 | area->vm_page_prot = pgprot_writecombine(area->vm_page_prot); | |
3387 | return remap_pfn_range(area, area->vm_start, | |
3388 | substream->dma_buffer.addr >> PAGE_SHIFT, | |
3389 | area->vm_end - area->vm_start, area->vm_page_prot); | |
3390 | } | |
a5606f85 | 3391 | #endif /* CONFIG_GENERIC_ALLOCATOR */ |
49d776ff | 3392 | #ifndef CONFIG_X86 /* for avoiding warnings arch/x86/mm/pat.c */ |
657b1989 TI |
3393 | if (!substream->ops->page && |
3394 | substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV) | |
3395 | return dma_mmap_coherent(substream->dma_buffer.dev.dev, | |
3396 | area, | |
3397 | substream->runtime->dma_area, | |
3398 | substream->runtime->dma_addr, | |
3399 | area->vm_end - area->vm_start); | |
49d776ff | 3400 | #endif /* CONFIG_X86 */ |
657b1989 TI |
3401 | /* mmap with fault handler */ |
3402 | area->vm_ops = &snd_pcm_vm_ops_data_fault; | |
1da177e4 LT |
3403 | return 0; |
3404 | } | |
18a2b962 | 3405 | EXPORT_SYMBOL_GPL(snd_pcm_lib_default_mmap); |
1da177e4 LT |
3406 | |
3407 | /* | |
3408 | * mmap the DMA buffer on I/O memory area | |
3409 | */ | |
3410 | #if SNDRV_PCM_INFO_MMAP_IOMEM | |
30b771cf TI |
3411 | /** |
3412 | * snd_pcm_lib_mmap_iomem - Default PCM data mmap function for I/O mem | |
3413 | * @substream: PCM substream | |
3414 | * @area: VMA | |
3415 | * | |
3416 | * When your hardware uses the iomapped pages as the hardware buffer and | |
3417 | * wants to mmap it, pass this function as mmap pcm_ops. Note that this | |
3418 | * is supposed to work only on limited architectures. | |
3419 | */ | |
877211f5 TI |
3420 | int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream, |
3421 | struct vm_area_struct *area) | |
1da177e4 | 3422 | { |
0fe09a45 | 3423 | struct snd_pcm_runtime *runtime = substream->runtime;; |
1da177e4 | 3424 | |
1da177e4 | 3425 | area->vm_page_prot = pgprot_noncached(area->vm_page_prot); |
0fe09a45 | 3426 | return vm_iomap_memory(area, runtime->dma_addr, runtime->dma_bytes); |
1da177e4 | 3427 | } |
e88e8ae6 TI |
3428 | |
3429 | EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem); | |
1da177e4 LT |
3430 | #endif /* SNDRV_PCM_INFO_MMAP */ |
3431 | ||
3432 | /* | |
3433 | * mmap DMA buffer | |
3434 | */ | |
877211f5 | 3435 | int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file, |
1da177e4 LT |
3436 | struct vm_area_struct *area) |
3437 | { | |
877211f5 | 3438 | struct snd_pcm_runtime *runtime; |
1da177e4 LT |
3439 | long size; |
3440 | unsigned long offset; | |
3441 | size_t dma_bytes; | |
657b1989 | 3442 | int err; |
1da177e4 LT |
3443 | |
3444 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { | |
3445 | if (!(area->vm_flags & (VM_WRITE|VM_READ))) | |
3446 | return -EINVAL; | |
3447 | } else { | |
3448 | if (!(area->vm_flags & VM_READ)) | |
3449 | return -EINVAL; | |
3450 | } | |
3451 | runtime = substream->runtime; | |
1da177e4 LT |
3452 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) |
3453 | return -EBADFD; | |
3454 | if (!(runtime->info & SNDRV_PCM_INFO_MMAP)) | |
3455 | return -ENXIO; | |
3456 | if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED || | |
3457 | runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) | |
3458 | return -EINVAL; | |
3459 | size = area->vm_end - area->vm_start; | |
3460 | offset = area->vm_pgoff << PAGE_SHIFT; | |
3461 | dma_bytes = PAGE_ALIGN(runtime->dma_bytes); | |
3462 | if ((size_t)size > dma_bytes) | |
3463 | return -EINVAL; | |
3464 | if (offset > dma_bytes - size) | |
3465 | return -EINVAL; | |
3466 | ||
657b1989 TI |
3467 | area->vm_ops = &snd_pcm_vm_ops_data; |
3468 | area->vm_private_data = substream; | |
1da177e4 | 3469 | if (substream->ops->mmap) |
657b1989 | 3470 | err = substream->ops->mmap(substream, area); |
1da177e4 | 3471 | else |
18a2b962 | 3472 | err = snd_pcm_lib_default_mmap(substream, area); |
657b1989 TI |
3473 | if (!err) |
3474 | atomic_inc(&substream->mmap_count); | |
3475 | return err; | |
1da177e4 LT |
3476 | } |
3477 | ||
e88e8ae6 TI |
3478 | EXPORT_SYMBOL(snd_pcm_mmap_data); |
3479 | ||
1da177e4 LT |
3480 | static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area) |
3481 | { | |
877211f5 TI |
3482 | struct snd_pcm_file * pcm_file; |
3483 | struct snd_pcm_substream *substream; | |
1da177e4 LT |
3484 | unsigned long offset; |
3485 | ||
3486 | pcm_file = file->private_data; | |
3487 | substream = pcm_file->substream; | |
7eaa943c TI |
3488 | if (PCM_RUNTIME_CHECK(substream)) |
3489 | return -ENXIO; | |
1da177e4 LT |
3490 | |
3491 | offset = area->vm_pgoff << PAGE_SHIFT; | |
3492 | switch (offset) { | |
3493 | case SNDRV_PCM_MMAP_OFFSET_STATUS: | |
548a648b | 3494 | if (pcm_file->no_compat_mmap) |
1da177e4 LT |
3495 | return -ENXIO; |
3496 | return snd_pcm_mmap_status(substream, file, area); | |
3497 | case SNDRV_PCM_MMAP_OFFSET_CONTROL: | |
548a648b | 3498 | if (pcm_file->no_compat_mmap) |
1da177e4 LT |
3499 | return -ENXIO; |
3500 | return snd_pcm_mmap_control(substream, file, area); | |
3501 | default: | |
3502 | return snd_pcm_mmap_data(substream, file, area); | |
3503 | } | |
3504 | return 0; | |
3505 | } | |
3506 | ||
3507 | static int snd_pcm_fasync(int fd, struct file * file, int on) | |
3508 | { | |
877211f5 TI |
3509 | struct snd_pcm_file * pcm_file; |
3510 | struct snd_pcm_substream *substream; | |
3511 | struct snd_pcm_runtime *runtime; | |
1da177e4 LT |
3512 | |
3513 | pcm_file = file->private_data; | |
3514 | substream = pcm_file->substream; | |
7eaa943c | 3515 | if (PCM_RUNTIME_CHECK(substream)) |
d05468b7 | 3516 | return -ENXIO; |
1da177e4 | 3517 | runtime = substream->runtime; |
d05468b7 | 3518 | return fasync_helper(fd, file, on, &runtime->fasync); |
1da177e4 LT |
3519 | } |
3520 | ||
3521 | /* | |
3522 | * ioctl32 compat | |
3523 | */ | |
3524 | #ifdef CONFIG_COMPAT | |
3525 | #include "pcm_compat.c" | |
3526 | #else | |
3527 | #define snd_pcm_ioctl_compat NULL | |
3528 | #endif | |
3529 | ||
3530 | /* | |
3531 | * To be removed helpers to keep binary compatibility | |
3532 | */ | |
3533 | ||
59d48582 | 3534 | #ifdef CONFIG_SND_SUPPORT_OLD_API |
1da177e4 LT |
3535 | #define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5)) |
3536 | #define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5)) | |
3537 | ||
877211f5 TI |
3538 | static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params *params, |
3539 | struct snd_pcm_hw_params_old *oparams) | |
1da177e4 LT |
3540 | { |
3541 | unsigned int i; | |
3542 | ||
3543 | memset(params, 0, sizeof(*params)); | |
3544 | params->flags = oparams->flags; | |
3545 | for (i = 0; i < ARRAY_SIZE(oparams->masks); i++) | |
3546 | params->masks[i].bits[0] = oparams->masks[i]; | |
3547 | memcpy(params->intervals, oparams->intervals, sizeof(oparams->intervals)); | |
3548 | params->rmask = __OLD_TO_NEW_MASK(oparams->rmask); | |
3549 | params->cmask = __OLD_TO_NEW_MASK(oparams->cmask); | |
3550 | params->info = oparams->info; | |
3551 | params->msbits = oparams->msbits; | |
3552 | params->rate_num = oparams->rate_num; | |
3553 | params->rate_den = oparams->rate_den; | |
3554 | params->fifo_size = oparams->fifo_size; | |
3555 | } | |
3556 | ||
877211f5 TI |
3557 | static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old *oparams, |
3558 | struct snd_pcm_hw_params *params) | |
1da177e4 LT |
3559 | { |
3560 | unsigned int i; | |
3561 | ||
3562 | memset(oparams, 0, sizeof(*oparams)); | |
3563 | oparams->flags = params->flags; | |
3564 | for (i = 0; i < ARRAY_SIZE(oparams->masks); i++) | |
3565 | oparams->masks[i] = params->masks[i].bits[0]; | |
3566 | memcpy(oparams->intervals, params->intervals, sizeof(oparams->intervals)); | |
3567 | oparams->rmask = __NEW_TO_OLD_MASK(params->rmask); | |
3568 | oparams->cmask = __NEW_TO_OLD_MASK(params->cmask); | |
3569 | oparams->info = params->info; | |
3570 | oparams->msbits = params->msbits; | |
3571 | oparams->rate_num = params->rate_num; | |
3572 | oparams->rate_den = params->rate_den; | |
3573 | oparams->fifo_size = params->fifo_size; | |
3574 | } | |
3575 | ||
877211f5 TI |
3576 | static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream, |
3577 | struct snd_pcm_hw_params_old __user * _oparams) | |
1da177e4 | 3578 | { |
877211f5 TI |
3579 | struct snd_pcm_hw_params *params; |
3580 | struct snd_pcm_hw_params_old *oparams = NULL; | |
1da177e4 LT |
3581 | int err; |
3582 | ||
3583 | params = kmalloc(sizeof(*params), GFP_KERNEL); | |
ef44a1ec LZ |
3584 | if (!params) |
3585 | return -ENOMEM; | |
1da177e4 | 3586 | |
ef44a1ec LZ |
3587 | oparams = memdup_user(_oparams, sizeof(*oparams)); |
3588 | if (IS_ERR(oparams)) { | |
3589 | err = PTR_ERR(oparams); | |
1da177e4 LT |
3590 | goto out; |
3591 | } | |
3592 | snd_pcm_hw_convert_from_old_params(params, oparams); | |
3593 | err = snd_pcm_hw_refine(substream, params); | |
3594 | snd_pcm_hw_convert_to_old_params(oparams, params); | |
3595 | if (copy_to_user(_oparams, oparams, sizeof(*oparams))) { | |
3596 | if (!err) | |
3597 | err = -EFAULT; | |
3598 | } | |
ef44a1ec LZ |
3599 | |
3600 | kfree(oparams); | |
1da177e4 LT |
3601 | out: |
3602 | kfree(params); | |
1da177e4 LT |
3603 | return err; |
3604 | } | |
3605 | ||
877211f5 TI |
3606 | static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream, |
3607 | struct snd_pcm_hw_params_old __user * _oparams) | |
1da177e4 | 3608 | { |
877211f5 TI |
3609 | struct snd_pcm_hw_params *params; |
3610 | struct snd_pcm_hw_params_old *oparams = NULL; | |
1da177e4 LT |
3611 | int err; |
3612 | ||
3613 | params = kmalloc(sizeof(*params), GFP_KERNEL); | |
ef44a1ec LZ |
3614 | if (!params) |
3615 | return -ENOMEM; | |
3616 | ||
3617 | oparams = memdup_user(_oparams, sizeof(*oparams)); | |
3618 | if (IS_ERR(oparams)) { | |
3619 | err = PTR_ERR(oparams); | |
1da177e4 LT |
3620 | goto out; |
3621 | } | |
3622 | snd_pcm_hw_convert_from_old_params(params, oparams); | |
3623 | err = snd_pcm_hw_params(substream, params); | |
3624 | snd_pcm_hw_convert_to_old_params(oparams, params); | |
3625 | if (copy_to_user(_oparams, oparams, sizeof(*oparams))) { | |
3626 | if (!err) | |
3627 | err = -EFAULT; | |
3628 | } | |
ef44a1ec LZ |
3629 | |
3630 | kfree(oparams); | |
1da177e4 LT |
3631 | out: |
3632 | kfree(params); | |
1da177e4 LT |
3633 | return err; |
3634 | } | |
59d48582 | 3635 | #endif /* CONFIG_SND_SUPPORT_OLD_API */ |
1da177e4 | 3636 | |
7003609b | 3637 | #ifndef CONFIG_MMU |
55c63bd2 DG |
3638 | static unsigned long snd_pcm_get_unmapped_area(struct file *file, |
3639 | unsigned long addr, | |
3640 | unsigned long len, | |
3641 | unsigned long pgoff, | |
3642 | unsigned long flags) | |
3643 | { | |
3644 | struct snd_pcm_file *pcm_file = file->private_data; | |
3645 | struct snd_pcm_substream *substream = pcm_file->substream; | |
3646 | struct snd_pcm_runtime *runtime = substream->runtime; | |
3647 | unsigned long offset = pgoff << PAGE_SHIFT; | |
3648 | ||
3649 | switch (offset) { | |
3650 | case SNDRV_PCM_MMAP_OFFSET_STATUS: | |
3651 | return (unsigned long)runtime->status; | |
3652 | case SNDRV_PCM_MMAP_OFFSET_CONTROL: | |
3653 | return (unsigned long)runtime->control; | |
3654 | default: | |
3655 | return (unsigned long)runtime->dma_area + offset; | |
3656 | } | |
7003609b CC |
3657 | } |
3658 | #else | |
55c63bd2 | 3659 | # define snd_pcm_get_unmapped_area NULL |
7003609b CC |
3660 | #endif |
3661 | ||
1da177e4 LT |
3662 | /* |
3663 | * Register section | |
3664 | */ | |
3665 | ||
9c2e08c5 | 3666 | const struct file_operations snd_pcm_f_ops[2] = { |
1da177e4 | 3667 | { |
2af677fc CL |
3668 | .owner = THIS_MODULE, |
3669 | .write = snd_pcm_write, | |
1c65d986 | 3670 | .write_iter = snd_pcm_writev, |
f87135f5 | 3671 | .open = snd_pcm_playback_open, |
2af677fc | 3672 | .release = snd_pcm_release, |
02f4865f | 3673 | .llseek = no_llseek, |
2af677fc CL |
3674 | .poll = snd_pcm_playback_poll, |
3675 | .unlocked_ioctl = snd_pcm_playback_ioctl, | |
3676 | .compat_ioctl = snd_pcm_ioctl_compat, | |
3677 | .mmap = snd_pcm_mmap, | |
3678 | .fasync = snd_pcm_fasync, | |
55c63bd2 | 3679 | .get_unmapped_area = snd_pcm_get_unmapped_area, |
1da177e4 LT |
3680 | }, |
3681 | { | |
2af677fc CL |
3682 | .owner = THIS_MODULE, |
3683 | .read = snd_pcm_read, | |
1c65d986 | 3684 | .read_iter = snd_pcm_readv, |
f87135f5 | 3685 | .open = snd_pcm_capture_open, |
2af677fc | 3686 | .release = snd_pcm_release, |
02f4865f | 3687 | .llseek = no_llseek, |
2af677fc CL |
3688 | .poll = snd_pcm_capture_poll, |
3689 | .unlocked_ioctl = snd_pcm_capture_ioctl, | |
3690 | .compat_ioctl = snd_pcm_ioctl_compat, | |
3691 | .mmap = snd_pcm_mmap, | |
3692 | .fasync = snd_pcm_fasync, | |
55c63bd2 | 3693 | .get_unmapped_area = snd_pcm_get_unmapped_area, |
1da177e4 LT |
3694 | } |
3695 | }; |