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