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> |
1da177e4 LT |
23 | #include <linux/file.h> |
24 | #include <linux/slab.h> | |
25 | #include <linux/time.h> | |
e8db0be1 | 26 | #include <linux/pm_qos.h> |
1da177e4 | 27 | #include <linux/uio.h> |
657b1989 | 28 | #include <linux/dma-mapping.h> |
1da177e4 LT |
29 | #include <sound/core.h> |
30 | #include <sound/control.h> | |
31 | #include <sound/info.h> | |
32 | #include <sound/pcm.h> | |
33 | #include <sound/pcm_params.h> | |
34 | #include <sound/timer.h> | |
35 | #include <sound/minors.h> | |
36 | #include <asm/io.h> | |
9fe17b5d TI |
37 | #if defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT) |
38 | #include <dma-coherence.h> | |
39 | #endif | |
1da177e4 LT |
40 | |
41 | /* | |
42 | * Compatibility | |
43 | */ | |
44 | ||
877211f5 | 45 | struct snd_pcm_hw_params_old { |
1da177e4 LT |
46 | unsigned int flags; |
47 | unsigned int masks[SNDRV_PCM_HW_PARAM_SUBFORMAT - | |
48 | SNDRV_PCM_HW_PARAM_ACCESS + 1]; | |
877211f5 | 49 | struct snd_interval intervals[SNDRV_PCM_HW_PARAM_TICK_TIME - |
1da177e4 LT |
50 | SNDRV_PCM_HW_PARAM_SAMPLE_BITS + 1]; |
51 | unsigned int rmask; | |
52 | unsigned int cmask; | |
53 | unsigned int info; | |
54 | unsigned int msbits; | |
55 | unsigned int rate_num; | |
56 | unsigned int rate_den; | |
877211f5 | 57 | snd_pcm_uframes_t fifo_size; |
1da177e4 LT |
58 | unsigned char reserved[64]; |
59 | }; | |
60 | ||
59d48582 | 61 | #ifdef CONFIG_SND_SUPPORT_OLD_API |
877211f5 TI |
62 | #define SNDRV_PCM_IOCTL_HW_REFINE_OLD _IOWR('A', 0x10, struct snd_pcm_hw_params_old) |
63 | #define SNDRV_PCM_IOCTL_HW_PARAMS_OLD _IOWR('A', 0x11, struct snd_pcm_hw_params_old) | |
1da177e4 | 64 | |
877211f5 TI |
65 | static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream, |
66 | struct snd_pcm_hw_params_old __user * _oparams); | |
67 | static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream, | |
68 | struct snd_pcm_hw_params_old __user * _oparams); | |
59d48582 | 69 | #endif |
f87135f5 | 70 | static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream); |
1da177e4 LT |
71 | |
72 | /* | |
73 | * | |
74 | */ | |
75 | ||
76 | DEFINE_RWLOCK(snd_pcm_link_rwlock); | |
e88e8ae6 | 77 | EXPORT_SYMBOL(snd_pcm_link_rwlock); |
1da177e4 | 78 | |
e88e8ae6 | 79 | static DECLARE_RWSEM(snd_pcm_link_rwsem); |
1da177e4 LT |
80 | |
81 | static inline mm_segment_t snd_enter_user(void) | |
82 | { | |
83 | mm_segment_t fs = get_fs(); | |
84 | set_fs(get_ds()); | |
85 | return fs; | |
86 | } | |
87 | ||
88 | static inline void snd_leave_user(mm_segment_t fs) | |
89 | { | |
90 | set_fs(fs); | |
91 | } | |
92 | ||
93 | ||
94 | ||
877211f5 | 95 | int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info) |
1da177e4 | 96 | { |
877211f5 TI |
97 | struct snd_pcm_runtime *runtime; |
98 | struct snd_pcm *pcm = substream->pcm; | |
99 | struct snd_pcm_str *pstr = substream->pstr; | |
1da177e4 | 100 | |
1da177e4 LT |
101 | memset(info, 0, sizeof(*info)); |
102 | info->card = pcm->card->number; | |
103 | info->device = pcm->device; | |
104 | info->stream = substream->stream; | |
105 | info->subdevice = substream->number; | |
106 | strlcpy(info->id, pcm->id, sizeof(info->id)); | |
107 | strlcpy(info->name, pcm->name, sizeof(info->name)); | |
108 | info->dev_class = pcm->dev_class; | |
109 | info->dev_subclass = pcm->dev_subclass; | |
110 | info->subdevices_count = pstr->substream_count; | |
111 | info->subdevices_avail = pstr->substream_count - pstr->substream_opened; | |
112 | strlcpy(info->subname, substream->name, sizeof(info->subname)); | |
113 | runtime = substream->runtime; | |
114 | /* AB: FIXME!!! This is definitely nonsense */ | |
115 | if (runtime) { | |
116 | info->sync = runtime->sync; | |
117 | substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_INFO, info); | |
118 | } | |
119 | return 0; | |
120 | } | |
121 | ||
877211f5 TI |
122 | int snd_pcm_info_user(struct snd_pcm_substream *substream, |
123 | struct snd_pcm_info __user * _info) | |
1da177e4 | 124 | { |
877211f5 | 125 | struct snd_pcm_info *info; |
1da177e4 LT |
126 | int err; |
127 | ||
128 | info = kmalloc(sizeof(*info), GFP_KERNEL); | |
129 | if (! info) | |
130 | return -ENOMEM; | |
131 | err = snd_pcm_info(substream, info); | |
132 | if (err >= 0) { | |
133 | if (copy_to_user(_info, info, sizeof(*info))) | |
134 | err = -EFAULT; | |
135 | } | |
136 | kfree(info); | |
137 | return err; | |
138 | } | |
139 | ||
140 | #undef RULES_DEBUG | |
141 | ||
142 | #ifdef RULES_DEBUG | |
143 | #define HW_PARAM(v) [SNDRV_PCM_HW_PARAM_##v] = #v | |
47023ec7 | 144 | static const char * const snd_pcm_hw_param_names[] = { |
1da177e4 LT |
145 | HW_PARAM(ACCESS), |
146 | HW_PARAM(FORMAT), | |
147 | HW_PARAM(SUBFORMAT), | |
148 | HW_PARAM(SAMPLE_BITS), | |
149 | HW_PARAM(FRAME_BITS), | |
150 | HW_PARAM(CHANNELS), | |
151 | HW_PARAM(RATE), | |
152 | HW_PARAM(PERIOD_TIME), | |
153 | HW_PARAM(PERIOD_SIZE), | |
154 | HW_PARAM(PERIOD_BYTES), | |
155 | HW_PARAM(PERIODS), | |
156 | HW_PARAM(BUFFER_TIME), | |
157 | HW_PARAM(BUFFER_SIZE), | |
158 | HW_PARAM(BUFFER_BYTES), | |
159 | HW_PARAM(TICK_TIME), | |
160 | }; | |
161 | #endif | |
162 | ||
877211f5 TI |
163 | int snd_pcm_hw_refine(struct snd_pcm_substream *substream, |
164 | struct snd_pcm_hw_params *params) | |
1da177e4 LT |
165 | { |
166 | unsigned int k; | |
877211f5 TI |
167 | struct snd_pcm_hardware *hw; |
168 | struct snd_interval *i = NULL; | |
169 | struct snd_mask *m = NULL; | |
170 | struct snd_pcm_hw_constraints *constrs = &substream->runtime->hw_constraints; | |
1da177e4 LT |
171 | unsigned int rstamps[constrs->rules_num]; |
172 | unsigned int vstamps[SNDRV_PCM_HW_PARAM_LAST_INTERVAL + 1]; | |
173 | unsigned int stamp = 2; | |
174 | int changed, again; | |
175 | ||
176 | params->info = 0; | |
177 | params->fifo_size = 0; | |
178 | if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_SAMPLE_BITS)) | |
179 | params->msbits = 0; | |
180 | if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_RATE)) { | |
181 | params->rate_num = 0; | |
182 | params->rate_den = 0; | |
183 | } | |
184 | ||
185 | for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) { | |
186 | m = hw_param_mask(params, k); | |
187 | if (snd_mask_empty(m)) | |
188 | return -EINVAL; | |
189 | if (!(params->rmask & (1 << k))) | |
190 | continue; | |
191 | #ifdef RULES_DEBUG | |
006de267 | 192 | printk(KERN_DEBUG "%s = ", snd_pcm_hw_param_names[k]); |
1da177e4 LT |
193 | printk("%04x%04x%04x%04x -> ", m->bits[3], m->bits[2], m->bits[1], m->bits[0]); |
194 | #endif | |
195 | changed = snd_mask_refine(m, constrs_mask(constrs, k)); | |
196 | #ifdef RULES_DEBUG | |
197 | printk("%04x%04x%04x%04x\n", m->bits[3], m->bits[2], m->bits[1], m->bits[0]); | |
198 | #endif | |
199 | if (changed) | |
200 | params->cmask |= 1 << k; | |
201 | if (changed < 0) | |
202 | return changed; | |
203 | } | |
204 | ||
205 | for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) { | |
206 | i = hw_param_interval(params, k); | |
207 | if (snd_interval_empty(i)) | |
208 | return -EINVAL; | |
209 | if (!(params->rmask & (1 << k))) | |
210 | continue; | |
211 | #ifdef RULES_DEBUG | |
006de267 | 212 | printk(KERN_DEBUG "%s = ", snd_pcm_hw_param_names[k]); |
1da177e4 LT |
213 | if (i->empty) |
214 | printk("empty"); | |
215 | else | |
216 | printk("%c%u %u%c", | |
217 | i->openmin ? '(' : '[', i->min, | |
218 | i->max, i->openmax ? ')' : ']'); | |
219 | printk(" -> "); | |
220 | #endif | |
221 | changed = snd_interval_refine(i, constrs_interval(constrs, k)); | |
222 | #ifdef RULES_DEBUG | |
223 | if (i->empty) | |
224 | printk("empty\n"); | |
225 | else | |
226 | printk("%c%u %u%c\n", | |
227 | i->openmin ? '(' : '[', i->min, | |
228 | i->max, i->openmax ? ')' : ']'); | |
229 | #endif | |
230 | if (changed) | |
231 | params->cmask |= 1 << k; | |
232 | if (changed < 0) | |
233 | return changed; | |
234 | } | |
235 | ||
236 | for (k = 0; k < constrs->rules_num; k++) | |
237 | rstamps[k] = 0; | |
238 | for (k = 0; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) | |
239 | vstamps[k] = (params->rmask & (1 << k)) ? 1 : 0; | |
240 | do { | |
241 | again = 0; | |
242 | for (k = 0; k < constrs->rules_num; k++) { | |
877211f5 | 243 | struct snd_pcm_hw_rule *r = &constrs->rules[k]; |
1da177e4 LT |
244 | unsigned int d; |
245 | int doit = 0; | |
246 | if (r->cond && !(r->cond & params->flags)) | |
247 | continue; | |
248 | for (d = 0; r->deps[d] >= 0; d++) { | |
249 | if (vstamps[r->deps[d]] > rstamps[k]) { | |
250 | doit = 1; | |
251 | break; | |
252 | } | |
253 | } | |
254 | if (!doit) | |
255 | continue; | |
256 | #ifdef RULES_DEBUG | |
006de267 | 257 | printk(KERN_DEBUG "Rule %d [%p]: ", k, r->func); |
1da177e4 LT |
258 | if (r->var >= 0) { |
259 | printk("%s = ", snd_pcm_hw_param_names[r->var]); | |
260 | if (hw_is_mask(r->var)) { | |
261 | m = hw_param_mask(params, r->var); | |
262 | printk("%x", *m->bits); | |
263 | } else { | |
264 | i = hw_param_interval(params, r->var); | |
265 | if (i->empty) | |
266 | printk("empty"); | |
267 | else | |
268 | printk("%c%u %u%c", | |
269 | i->openmin ? '(' : '[', i->min, | |
270 | i->max, i->openmax ? ')' : ']'); | |
271 | } | |
272 | } | |
273 | #endif | |
274 | changed = r->func(params, r); | |
275 | #ifdef RULES_DEBUG | |
276 | if (r->var >= 0) { | |
277 | printk(" -> "); | |
278 | if (hw_is_mask(r->var)) | |
279 | printk("%x", *m->bits); | |
280 | else { | |
281 | if (i->empty) | |
282 | printk("empty"); | |
283 | else | |
284 | printk("%c%u %u%c", | |
285 | i->openmin ? '(' : '[', i->min, | |
286 | i->max, i->openmax ? ')' : ']'); | |
287 | } | |
288 | } | |
289 | printk("\n"); | |
290 | #endif | |
291 | rstamps[k] = stamp; | |
292 | if (changed && r->var >= 0) { | |
293 | params->cmask |= (1 << r->var); | |
294 | vstamps[r->var] = stamp; | |
295 | again = 1; | |
296 | } | |
297 | if (changed < 0) | |
298 | return changed; | |
299 | stamp++; | |
300 | } | |
301 | } while (again); | |
302 | if (!params->msbits) { | |
303 | i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS); | |
304 | if (snd_interval_single(i)) | |
305 | params->msbits = snd_interval_value(i); | |
306 | } | |
307 | ||
308 | if (!params->rate_den) { | |
309 | i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE); | |
310 | if (snd_interval_single(i)) { | |
311 | params->rate_num = snd_interval_value(i); | |
312 | params->rate_den = 1; | |
313 | } | |
314 | } | |
315 | ||
316 | hw = &substream->runtime->hw; | |
317 | if (!params->info) | |
8bea869c JK |
318 | params->info = hw->info & ~SNDRV_PCM_INFO_FIFO_IN_FRAMES; |
319 | if (!params->fifo_size) { | |
3be522a9 JK |
320 | m = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); |
321 | i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS); | |
322 | if (snd_mask_min(m) == snd_mask_max(m) && | |
323 | snd_interval_min(i) == snd_interval_max(i)) { | |
8bea869c JK |
324 | changed = substream->ops->ioctl(substream, |
325 | SNDRV_PCM_IOCTL1_FIFO_SIZE, params); | |
8bd9bca3 | 326 | if (changed < 0) |
8bea869c JK |
327 | return changed; |
328 | } | |
329 | } | |
1da177e4 LT |
330 | params->rmask = 0; |
331 | return 0; | |
332 | } | |
333 | ||
e88e8ae6 TI |
334 | EXPORT_SYMBOL(snd_pcm_hw_refine); |
335 | ||
877211f5 TI |
336 | static int snd_pcm_hw_refine_user(struct snd_pcm_substream *substream, |
337 | struct snd_pcm_hw_params __user * _params) | |
1da177e4 | 338 | { |
877211f5 | 339 | struct snd_pcm_hw_params *params; |
1da177e4 LT |
340 | int err; |
341 | ||
ef44a1ec LZ |
342 | params = memdup_user(_params, sizeof(*params)); |
343 | if (IS_ERR(params)) | |
344 | return PTR_ERR(params); | |
345 | ||
1da177e4 LT |
346 | err = snd_pcm_hw_refine(substream, params); |
347 | if (copy_to_user(_params, params, sizeof(*params))) { | |
348 | if (!err) | |
349 | err = -EFAULT; | |
350 | } | |
ef44a1ec | 351 | |
1da177e4 LT |
352 | kfree(params); |
353 | return err; | |
354 | } | |
355 | ||
9442e691 TI |
356 | static int period_to_usecs(struct snd_pcm_runtime *runtime) |
357 | { | |
358 | int usecs; | |
359 | ||
360 | if (! runtime->rate) | |
361 | return -1; /* invalid */ | |
362 | ||
363 | /* take 75% of period time as the deadline */ | |
364 | usecs = (750000 / runtime->rate) * runtime->period_size; | |
365 | usecs += ((750000 % runtime->rate) * runtime->period_size) / | |
366 | runtime->rate; | |
367 | ||
368 | return usecs; | |
369 | } | |
370 | ||
877211f5 TI |
371 | static int snd_pcm_hw_params(struct snd_pcm_substream *substream, |
372 | struct snd_pcm_hw_params *params) | |
1da177e4 | 373 | { |
877211f5 | 374 | struct snd_pcm_runtime *runtime; |
9442e691 | 375 | int err, usecs; |
1da177e4 LT |
376 | unsigned int bits; |
377 | snd_pcm_uframes_t frames; | |
378 | ||
7eaa943c TI |
379 | if (PCM_RUNTIME_CHECK(substream)) |
380 | return -ENXIO; | |
1da177e4 | 381 | runtime = substream->runtime; |
1da177e4 LT |
382 | snd_pcm_stream_lock_irq(substream); |
383 | switch (runtime->status->state) { | |
384 | case SNDRV_PCM_STATE_OPEN: | |
385 | case SNDRV_PCM_STATE_SETUP: | |
386 | case SNDRV_PCM_STATE_PREPARED: | |
387 | break; | |
388 | default: | |
389 | snd_pcm_stream_unlock_irq(substream); | |
390 | return -EBADFD; | |
391 | } | |
392 | snd_pcm_stream_unlock_irq(substream); | |
393 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) | |
394 | if (!substream->oss.oss) | |
395 | #endif | |
9c323fcb | 396 | if (atomic_read(&substream->mmap_count)) |
1da177e4 LT |
397 | return -EBADFD; |
398 | ||
399 | params->rmask = ~0U; | |
400 | err = snd_pcm_hw_refine(substream, params); | |
401 | if (err < 0) | |
402 | goto _error; | |
403 | ||
404 | err = snd_pcm_hw_params_choose(substream, params); | |
405 | if (err < 0) | |
406 | goto _error; | |
407 | ||
408 | if (substream->ops->hw_params != NULL) { | |
409 | err = substream->ops->hw_params(substream, params); | |
410 | if (err < 0) | |
411 | goto _error; | |
412 | } | |
413 | ||
414 | runtime->access = params_access(params); | |
415 | runtime->format = params_format(params); | |
416 | runtime->subformat = params_subformat(params); | |
417 | runtime->channels = params_channels(params); | |
418 | runtime->rate = params_rate(params); | |
419 | runtime->period_size = params_period_size(params); | |
420 | runtime->periods = params_periods(params); | |
421 | runtime->buffer_size = params_buffer_size(params); | |
1da177e4 LT |
422 | runtime->info = params->info; |
423 | runtime->rate_num = params->rate_num; | |
424 | runtime->rate_den = params->rate_den; | |
ab69a490 CL |
425 | runtime->no_period_wakeup = |
426 | (params->info & SNDRV_PCM_INFO_NO_PERIOD_WAKEUP) && | |
427 | (params->flags & SNDRV_PCM_HW_PARAMS_NO_PERIOD_WAKEUP); | |
1da177e4 LT |
428 | |
429 | bits = snd_pcm_format_physical_width(runtime->format); | |
430 | runtime->sample_bits = bits; | |
431 | bits *= runtime->channels; | |
432 | runtime->frame_bits = bits; | |
433 | frames = 1; | |
434 | while (bits % 8 != 0) { | |
435 | bits *= 2; | |
436 | frames *= 2; | |
437 | } | |
438 | runtime->byte_align = bits / 8; | |
439 | runtime->min_align = frames; | |
440 | ||
441 | /* Default sw params */ | |
442 | runtime->tstamp_mode = SNDRV_PCM_TSTAMP_NONE; | |
443 | runtime->period_step = 1; | |
1da177e4 | 444 | runtime->control->avail_min = runtime->period_size; |
1da177e4 LT |
445 | runtime->start_threshold = 1; |
446 | runtime->stop_threshold = runtime->buffer_size; | |
447 | runtime->silence_threshold = 0; | |
448 | runtime->silence_size = 0; | |
ead4046b CL |
449 | runtime->boundary = runtime->buffer_size; |
450 | while (runtime->boundary * 2 <= LONG_MAX - runtime->buffer_size) | |
451 | runtime->boundary *= 2; | |
1da177e4 LT |
452 | |
453 | snd_pcm_timer_resolution_change(substream); | |
454 | runtime->status->state = SNDRV_PCM_STATE_SETUP; | |
9442e691 | 455 | |
82f68251 JB |
456 | if (pm_qos_request_active(&substream->latency_pm_qos_req)) |
457 | pm_qos_remove_request(&substream->latency_pm_qos_req); | |
9442e691 | 458 | if ((usecs = period_to_usecs(runtime)) >= 0) |
82f68251 JB |
459 | pm_qos_add_request(&substream->latency_pm_qos_req, |
460 | PM_QOS_CPU_DMA_LATENCY, usecs); | |
1da177e4 LT |
461 | return 0; |
462 | _error: | |
25985edc | 463 | /* hardware might be unusable from this time, |
1da177e4 LT |
464 | so we force application to retry to set |
465 | the correct hardware parameter settings */ | |
466 | runtime->status->state = SNDRV_PCM_STATE_OPEN; | |
467 | if (substream->ops->hw_free != NULL) | |
468 | substream->ops->hw_free(substream); | |
469 | return err; | |
470 | } | |
471 | ||
877211f5 TI |
472 | static int snd_pcm_hw_params_user(struct snd_pcm_substream *substream, |
473 | struct snd_pcm_hw_params __user * _params) | |
1da177e4 | 474 | { |
877211f5 | 475 | struct snd_pcm_hw_params *params; |
1da177e4 LT |
476 | int err; |
477 | ||
ef44a1ec LZ |
478 | params = memdup_user(_params, sizeof(*params)); |
479 | if (IS_ERR(params)) | |
480 | return PTR_ERR(params); | |
481 | ||
1da177e4 LT |
482 | err = snd_pcm_hw_params(substream, params); |
483 | if (copy_to_user(_params, params, sizeof(*params))) { | |
484 | if (!err) | |
485 | err = -EFAULT; | |
486 | } | |
ef44a1ec | 487 | |
1da177e4 LT |
488 | kfree(params); |
489 | return err; | |
490 | } | |
491 | ||
877211f5 | 492 | static int snd_pcm_hw_free(struct snd_pcm_substream *substream) |
1da177e4 | 493 | { |
877211f5 | 494 | struct snd_pcm_runtime *runtime; |
1da177e4 LT |
495 | int result = 0; |
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_SETUP: | |
503 | case SNDRV_PCM_STATE_PREPARED: | |
504 | break; | |
505 | default: | |
506 | snd_pcm_stream_unlock_irq(substream); | |
507 | return -EBADFD; | |
508 | } | |
509 | snd_pcm_stream_unlock_irq(substream); | |
9c323fcb | 510 | if (atomic_read(&substream->mmap_count)) |
1da177e4 LT |
511 | return -EBADFD; |
512 | if (substream->ops->hw_free) | |
513 | result = substream->ops->hw_free(substream); | |
514 | runtime->status->state = SNDRV_PCM_STATE_OPEN; | |
82f68251 | 515 | pm_qos_remove_request(&substream->latency_pm_qos_req); |
1da177e4 LT |
516 | return result; |
517 | } | |
518 | ||
877211f5 TI |
519 | static int snd_pcm_sw_params(struct snd_pcm_substream *substream, |
520 | struct snd_pcm_sw_params *params) | |
1da177e4 | 521 | { |
877211f5 | 522 | struct snd_pcm_runtime *runtime; |
1250932e | 523 | int err; |
1da177e4 | 524 | |
7eaa943c TI |
525 | if (PCM_RUNTIME_CHECK(substream)) |
526 | return -ENXIO; | |
1da177e4 | 527 | runtime = substream->runtime; |
1da177e4 LT |
528 | snd_pcm_stream_lock_irq(substream); |
529 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { | |
530 | snd_pcm_stream_unlock_irq(substream); | |
531 | return -EBADFD; | |
532 | } | |
533 | snd_pcm_stream_unlock_irq(substream); | |
534 | ||
535 | if (params->tstamp_mode > SNDRV_PCM_TSTAMP_LAST) | |
536 | return -EINVAL; | |
537 | if (params->avail_min == 0) | |
538 | return -EINVAL; | |
1da177e4 LT |
539 | if (params->silence_size >= runtime->boundary) { |
540 | if (params->silence_threshold != 0) | |
541 | return -EINVAL; | |
542 | } else { | |
543 | if (params->silence_size > params->silence_threshold) | |
544 | return -EINVAL; | |
545 | if (params->silence_threshold > runtime->buffer_size) | |
546 | return -EINVAL; | |
547 | } | |
1250932e | 548 | err = 0; |
1da177e4 LT |
549 | snd_pcm_stream_lock_irq(substream); |
550 | runtime->tstamp_mode = params->tstamp_mode; | |
1da177e4 LT |
551 | runtime->period_step = params->period_step; |
552 | runtime->control->avail_min = params->avail_min; | |
553 | runtime->start_threshold = params->start_threshold; | |
554 | runtime->stop_threshold = params->stop_threshold; | |
555 | runtime->silence_threshold = params->silence_threshold; | |
556 | runtime->silence_size = params->silence_size; | |
1da177e4 LT |
557 | params->boundary = runtime->boundary; |
558 | if (snd_pcm_running(substream)) { | |
1da177e4 LT |
559 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && |
560 | runtime->silence_size > 0) | |
561 | snd_pcm_playback_silence(substream, ULONG_MAX); | |
1250932e | 562 | err = snd_pcm_update_state(substream, runtime); |
1da177e4 LT |
563 | } |
564 | snd_pcm_stream_unlock_irq(substream); | |
1250932e | 565 | return err; |
1da177e4 LT |
566 | } |
567 | ||
877211f5 TI |
568 | static int snd_pcm_sw_params_user(struct snd_pcm_substream *substream, |
569 | struct snd_pcm_sw_params __user * _params) | |
1da177e4 | 570 | { |
877211f5 | 571 | struct snd_pcm_sw_params params; |
1da177e4 LT |
572 | int err; |
573 | if (copy_from_user(¶ms, _params, sizeof(params))) | |
574 | return -EFAULT; | |
575 | err = snd_pcm_sw_params(substream, ¶ms); | |
576 | if (copy_to_user(_params, ¶ms, sizeof(params))) | |
577 | return -EFAULT; | |
578 | return err; | |
579 | } | |
580 | ||
877211f5 TI |
581 | int snd_pcm_status(struct snd_pcm_substream *substream, |
582 | struct snd_pcm_status *status) | |
1da177e4 | 583 | { |
877211f5 | 584 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
585 | |
586 | snd_pcm_stream_lock_irq(substream); | |
587 | status->state = runtime->status->state; | |
588 | status->suspended_state = runtime->status->suspended_state; | |
589 | if (status->state == SNDRV_PCM_STATE_OPEN) | |
590 | goto _end; | |
591 | status->trigger_tstamp = runtime->trigger_tstamp; | |
8c121586 | 592 | if (snd_pcm_running(substream)) { |
1da177e4 | 593 | snd_pcm_update_hw_ptr(substream); |
8c121586 JK |
594 | if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) { |
595 | status->tstamp = runtime->status->tstamp; | |
596 | goto _tstamp_end; | |
597 | } | |
598 | } | |
a713b583 | 599 | snd_pcm_gettime(runtime, &status->tstamp); |
8c121586 | 600 | _tstamp_end: |
1da177e4 LT |
601 | status->appl_ptr = runtime->control->appl_ptr; |
602 | status->hw_ptr = runtime->status->hw_ptr; | |
603 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { | |
604 | status->avail = snd_pcm_playback_avail(runtime); | |
605 | if (runtime->status->state == SNDRV_PCM_STATE_RUNNING || | |
4bbe1ddf | 606 | runtime->status->state == SNDRV_PCM_STATE_DRAINING) { |
1da177e4 | 607 | status->delay = runtime->buffer_size - status->avail; |
4bbe1ddf TI |
608 | status->delay += runtime->delay; |
609 | } else | |
1da177e4 LT |
610 | status->delay = 0; |
611 | } else { | |
612 | status->avail = snd_pcm_capture_avail(runtime); | |
613 | if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) | |
4bbe1ddf | 614 | status->delay = status->avail + runtime->delay; |
1da177e4 LT |
615 | else |
616 | status->delay = 0; | |
617 | } | |
618 | status->avail_max = runtime->avail_max; | |
619 | status->overrange = runtime->overrange; | |
620 | runtime->avail_max = 0; | |
621 | runtime->overrange = 0; | |
622 | _end: | |
623 | snd_pcm_stream_unlock_irq(substream); | |
624 | return 0; | |
625 | } | |
626 | ||
877211f5 TI |
627 | static int snd_pcm_status_user(struct snd_pcm_substream *substream, |
628 | struct snd_pcm_status __user * _status) | |
1da177e4 | 629 | { |
877211f5 | 630 | struct snd_pcm_status status; |
1da177e4 LT |
631 | int res; |
632 | ||
1da177e4 LT |
633 | memset(&status, 0, sizeof(status)); |
634 | res = snd_pcm_status(substream, &status); | |
635 | if (res < 0) | |
636 | return res; | |
637 | if (copy_to_user(_status, &status, sizeof(status))) | |
638 | return -EFAULT; | |
639 | return 0; | |
640 | } | |
641 | ||
877211f5 TI |
642 | static int snd_pcm_channel_info(struct snd_pcm_substream *substream, |
643 | struct snd_pcm_channel_info * info) | |
1da177e4 | 644 | { |
877211f5 | 645 | struct snd_pcm_runtime *runtime; |
1da177e4 LT |
646 | unsigned int channel; |
647 | ||
1da177e4 LT |
648 | channel = info->channel; |
649 | runtime = substream->runtime; | |
650 | snd_pcm_stream_lock_irq(substream); | |
651 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { | |
652 | snd_pcm_stream_unlock_irq(substream); | |
653 | return -EBADFD; | |
654 | } | |
655 | snd_pcm_stream_unlock_irq(substream); | |
656 | if (channel >= runtime->channels) | |
657 | return -EINVAL; | |
658 | memset(info, 0, sizeof(*info)); | |
659 | info->channel = channel; | |
660 | return substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_CHANNEL_INFO, info); | |
661 | } | |
662 | ||
877211f5 TI |
663 | static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream, |
664 | struct snd_pcm_channel_info __user * _info) | |
1da177e4 | 665 | { |
877211f5 | 666 | struct snd_pcm_channel_info info; |
1da177e4 LT |
667 | int res; |
668 | ||
669 | if (copy_from_user(&info, _info, sizeof(info))) | |
670 | return -EFAULT; | |
671 | res = snd_pcm_channel_info(substream, &info); | |
672 | if (res < 0) | |
673 | return res; | |
674 | if (copy_to_user(_info, &info, sizeof(info))) | |
675 | return -EFAULT; | |
676 | return 0; | |
677 | } | |
678 | ||
877211f5 | 679 | static void snd_pcm_trigger_tstamp(struct snd_pcm_substream *substream) |
1da177e4 | 680 | { |
877211f5 | 681 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
682 | if (runtime->trigger_master == NULL) |
683 | return; | |
684 | if (runtime->trigger_master == substream) { | |
b751eef1 | 685 | snd_pcm_gettime(runtime, &runtime->trigger_tstamp); |
1da177e4 LT |
686 | } else { |
687 | snd_pcm_trigger_tstamp(runtime->trigger_master); | |
688 | runtime->trigger_tstamp = runtime->trigger_master->runtime->trigger_tstamp; | |
689 | } | |
690 | runtime->trigger_master = NULL; | |
691 | } | |
692 | ||
693 | struct action_ops { | |
877211f5 TI |
694 | int (*pre_action)(struct snd_pcm_substream *substream, int state); |
695 | int (*do_action)(struct snd_pcm_substream *substream, int state); | |
696 | void (*undo_action)(struct snd_pcm_substream *substream, int state); | |
697 | void (*post_action)(struct snd_pcm_substream *substream, int state); | |
1da177e4 LT |
698 | }; |
699 | ||
700 | /* | |
701 | * this functions is core for handling of linked stream | |
702 | * Note: the stream state might be changed also on failure | |
703 | * Note2: call with calling stream lock + link lock | |
704 | */ | |
705 | static int snd_pcm_action_group(struct action_ops *ops, | |
877211f5 | 706 | struct snd_pcm_substream *substream, |
1da177e4 LT |
707 | int state, int do_lock) |
708 | { | |
877211f5 TI |
709 | struct snd_pcm_substream *s = NULL; |
710 | struct snd_pcm_substream *s1; | |
1da177e4 LT |
711 | int res = 0; |
712 | ||
ef991b95 | 713 | snd_pcm_group_for_each_entry(s, substream) { |
1da177e4 | 714 | if (do_lock && s != substream) |
208eee2a FD |
715 | spin_lock_nested(&s->self_group.lock, |
716 | SINGLE_DEPTH_NESTING); | |
1da177e4 LT |
717 | res = ops->pre_action(s, state); |
718 | if (res < 0) | |
719 | goto _unlock; | |
720 | } | |
ef991b95 | 721 | snd_pcm_group_for_each_entry(s, substream) { |
1da177e4 LT |
722 | res = ops->do_action(s, state); |
723 | if (res < 0) { | |
724 | if (ops->undo_action) { | |
ef991b95 | 725 | snd_pcm_group_for_each_entry(s1, substream) { |
1da177e4 LT |
726 | if (s1 == s) /* failed stream */ |
727 | break; | |
728 | ops->undo_action(s1, state); | |
729 | } | |
730 | } | |
731 | s = NULL; /* unlock all */ | |
732 | goto _unlock; | |
733 | } | |
734 | } | |
ef991b95 | 735 | snd_pcm_group_for_each_entry(s, substream) { |
1da177e4 LT |
736 | ops->post_action(s, state); |
737 | } | |
738 | _unlock: | |
739 | if (do_lock) { | |
740 | /* unlock streams */ | |
ef991b95 | 741 | snd_pcm_group_for_each_entry(s1, substream) { |
1da177e4 LT |
742 | if (s1 != substream) |
743 | spin_unlock(&s1->self_group.lock); | |
744 | if (s1 == s) /* end */ | |
745 | break; | |
746 | } | |
747 | } | |
748 | return res; | |
749 | } | |
750 | ||
751 | /* | |
752 | * Note: call with stream lock | |
753 | */ | |
754 | static int snd_pcm_action_single(struct action_ops *ops, | |
877211f5 | 755 | struct snd_pcm_substream *substream, |
1da177e4 LT |
756 | int state) |
757 | { | |
758 | int res; | |
759 | ||
760 | res = ops->pre_action(substream, state); | |
761 | if (res < 0) | |
762 | return res; | |
763 | res = ops->do_action(substream, state); | |
764 | if (res == 0) | |
765 | ops->post_action(substream, state); | |
766 | else if (ops->undo_action) | |
767 | ops->undo_action(substream, state); | |
768 | return res; | |
769 | } | |
770 | ||
771 | /* | |
772 | * Note: call with stream lock | |
773 | */ | |
774 | static int snd_pcm_action(struct action_ops *ops, | |
877211f5 | 775 | struct snd_pcm_substream *substream, |
1da177e4 LT |
776 | int state) |
777 | { | |
778 | int res; | |
779 | ||
780 | if (snd_pcm_stream_linked(substream)) { | |
781 | if (!spin_trylock(&substream->group->lock)) { | |
782 | spin_unlock(&substream->self_group.lock); | |
783 | spin_lock(&substream->group->lock); | |
784 | spin_lock(&substream->self_group.lock); | |
785 | } | |
786 | res = snd_pcm_action_group(ops, substream, state, 1); | |
787 | spin_unlock(&substream->group->lock); | |
788 | } else { | |
789 | res = snd_pcm_action_single(ops, substream, state); | |
790 | } | |
791 | return res; | |
792 | } | |
793 | ||
794 | /* | |
795 | * Note: don't use any locks before | |
796 | */ | |
797 | static int snd_pcm_action_lock_irq(struct action_ops *ops, | |
877211f5 | 798 | struct snd_pcm_substream *substream, |
1da177e4 LT |
799 | int state) |
800 | { | |
801 | int res; | |
802 | ||
803 | read_lock_irq(&snd_pcm_link_rwlock); | |
804 | if (snd_pcm_stream_linked(substream)) { | |
805 | spin_lock(&substream->group->lock); | |
806 | spin_lock(&substream->self_group.lock); | |
807 | res = snd_pcm_action_group(ops, substream, state, 1); | |
808 | spin_unlock(&substream->self_group.lock); | |
809 | spin_unlock(&substream->group->lock); | |
810 | } else { | |
811 | spin_lock(&substream->self_group.lock); | |
812 | res = snd_pcm_action_single(ops, substream, state); | |
813 | spin_unlock(&substream->self_group.lock); | |
814 | } | |
815 | read_unlock_irq(&snd_pcm_link_rwlock); | |
816 | return res; | |
817 | } | |
818 | ||
819 | /* | |
820 | */ | |
821 | static int snd_pcm_action_nonatomic(struct action_ops *ops, | |
877211f5 | 822 | struct snd_pcm_substream *substream, |
1da177e4 LT |
823 | int state) |
824 | { | |
825 | int res; | |
826 | ||
827 | down_read(&snd_pcm_link_rwsem); | |
828 | if (snd_pcm_stream_linked(substream)) | |
829 | res = snd_pcm_action_group(ops, substream, state, 0); | |
830 | else | |
831 | res = snd_pcm_action_single(ops, substream, state); | |
832 | up_read(&snd_pcm_link_rwsem); | |
833 | return res; | |
834 | } | |
835 | ||
836 | /* | |
837 | * start callbacks | |
838 | */ | |
877211f5 | 839 | static int snd_pcm_pre_start(struct snd_pcm_substream *substream, int state) |
1da177e4 | 840 | { |
877211f5 | 841 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
842 | if (runtime->status->state != SNDRV_PCM_STATE_PREPARED) |
843 | return -EBADFD; | |
844 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && | |
845 | !snd_pcm_playback_data(substream)) | |
846 | return -EPIPE; | |
847 | runtime->trigger_master = substream; | |
848 | return 0; | |
849 | } | |
850 | ||
877211f5 | 851 | static int snd_pcm_do_start(struct snd_pcm_substream *substream, int state) |
1da177e4 LT |
852 | { |
853 | if (substream->runtime->trigger_master != substream) | |
854 | return 0; | |
855 | return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_START); | |
856 | } | |
857 | ||
877211f5 | 858 | static void snd_pcm_undo_start(struct snd_pcm_substream *substream, int state) |
1da177e4 LT |
859 | { |
860 | if (substream->runtime->trigger_master == substream) | |
861 | substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP); | |
862 | } | |
863 | ||
877211f5 | 864 | static void snd_pcm_post_start(struct snd_pcm_substream *substream, int state) |
1da177e4 | 865 | { |
877211f5 | 866 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 | 867 | snd_pcm_trigger_tstamp(substream); |
6af3fb72 | 868 | runtime->hw_ptr_jiffies = jiffies; |
bd76af0f JK |
869 | runtime->hw_ptr_buffer_jiffies = (runtime->buffer_size * HZ) / |
870 | runtime->rate; | |
1da177e4 LT |
871 | runtime->status->state = state; |
872 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && | |
873 | runtime->silence_size > 0) | |
874 | snd_pcm_playback_silence(substream, ULONG_MAX); | |
1da177e4 | 875 | if (substream->timer) |
877211f5 TI |
876 | snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTART, |
877 | &runtime->trigger_tstamp); | |
1da177e4 LT |
878 | } |
879 | ||
880 | static struct action_ops snd_pcm_action_start = { | |
881 | .pre_action = snd_pcm_pre_start, | |
882 | .do_action = snd_pcm_do_start, | |
883 | .undo_action = snd_pcm_undo_start, | |
884 | .post_action = snd_pcm_post_start | |
885 | }; | |
886 | ||
887 | /** | |
1c85cc64 | 888 | * snd_pcm_start - start all linked streams |
df8db936 | 889 | * @substream: the PCM substream instance |
1da177e4 | 890 | */ |
877211f5 | 891 | int snd_pcm_start(struct snd_pcm_substream *substream) |
1da177e4 | 892 | { |
877211f5 TI |
893 | return snd_pcm_action(&snd_pcm_action_start, substream, |
894 | SNDRV_PCM_STATE_RUNNING); | |
1da177e4 LT |
895 | } |
896 | ||
897 | /* | |
898 | * stop callbacks | |
899 | */ | |
877211f5 | 900 | static int snd_pcm_pre_stop(struct snd_pcm_substream *substream, int state) |
1da177e4 | 901 | { |
877211f5 | 902 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
903 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) |
904 | return -EBADFD; | |
905 | runtime->trigger_master = substream; | |
906 | return 0; | |
907 | } | |
908 | ||
877211f5 | 909 | static int snd_pcm_do_stop(struct snd_pcm_substream *substream, int state) |
1da177e4 LT |
910 | { |
911 | if (substream->runtime->trigger_master == substream && | |
912 | snd_pcm_running(substream)) | |
913 | substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP); | |
914 | return 0; /* unconditonally stop all substreams */ | |
915 | } | |
916 | ||
877211f5 | 917 | static void snd_pcm_post_stop(struct snd_pcm_substream *substream, int state) |
1da177e4 | 918 | { |
877211f5 | 919 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
920 | if (runtime->status->state != state) { |
921 | snd_pcm_trigger_tstamp(substream); | |
922 | if (substream->timer) | |
877211f5 TI |
923 | snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTOP, |
924 | &runtime->trigger_tstamp); | |
1da177e4 | 925 | runtime->status->state = state; |
1da177e4 LT |
926 | } |
927 | wake_up(&runtime->sleep); | |
c91a988d | 928 | wake_up(&runtime->tsleep); |
1da177e4 LT |
929 | } |
930 | ||
931 | static struct action_ops snd_pcm_action_stop = { | |
932 | .pre_action = snd_pcm_pre_stop, | |
933 | .do_action = snd_pcm_do_stop, | |
934 | .post_action = snd_pcm_post_stop | |
935 | }; | |
936 | ||
937 | /** | |
1c85cc64 | 938 | * snd_pcm_stop - try to stop all running streams in the substream group |
df8db936 TI |
939 | * @substream: the PCM substream instance |
940 | * @state: PCM state after stopping the stream | |
1da177e4 | 941 | * |
1c85cc64 | 942 | * The state of each stream is then changed to the given state unconditionally. |
1da177e4 | 943 | */ |
fea952e5 | 944 | int snd_pcm_stop(struct snd_pcm_substream *substream, snd_pcm_state_t state) |
1da177e4 LT |
945 | { |
946 | return snd_pcm_action(&snd_pcm_action_stop, substream, state); | |
947 | } | |
948 | ||
e88e8ae6 TI |
949 | EXPORT_SYMBOL(snd_pcm_stop); |
950 | ||
1da177e4 | 951 | /** |
1c85cc64 | 952 | * snd_pcm_drain_done - stop the DMA only when the given stream is playback |
df8db936 | 953 | * @substream: the PCM substream |
1da177e4 | 954 | * |
1c85cc64 | 955 | * After stopping, the state is changed to SETUP. |
1da177e4 LT |
956 | * Unlike snd_pcm_stop(), this affects only the given stream. |
957 | */ | |
877211f5 | 958 | int snd_pcm_drain_done(struct snd_pcm_substream *substream) |
1da177e4 | 959 | { |
877211f5 TI |
960 | return snd_pcm_action_single(&snd_pcm_action_stop, substream, |
961 | SNDRV_PCM_STATE_SETUP); | |
1da177e4 LT |
962 | } |
963 | ||
964 | /* | |
965 | * pause callbacks | |
966 | */ | |
877211f5 | 967 | static int snd_pcm_pre_pause(struct snd_pcm_substream *substream, int push) |
1da177e4 | 968 | { |
877211f5 | 969 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
970 | if (!(runtime->info & SNDRV_PCM_INFO_PAUSE)) |
971 | return -ENOSYS; | |
972 | if (push) { | |
973 | if (runtime->status->state != SNDRV_PCM_STATE_RUNNING) | |
974 | return -EBADFD; | |
975 | } else if (runtime->status->state != SNDRV_PCM_STATE_PAUSED) | |
976 | return -EBADFD; | |
977 | runtime->trigger_master = substream; | |
978 | return 0; | |
979 | } | |
980 | ||
877211f5 | 981 | static int snd_pcm_do_pause(struct snd_pcm_substream *substream, int push) |
1da177e4 LT |
982 | { |
983 | if (substream->runtime->trigger_master != substream) | |
984 | return 0; | |
56385a12 JK |
985 | /* some drivers might use hw_ptr to recover from the pause - |
986 | update the hw_ptr now */ | |
987 | if (push) | |
988 | snd_pcm_update_hw_ptr(substream); | |
6af3fb72 | 989 | /* The jiffies check in snd_pcm_update_hw_ptr*() is done by |
b595076a | 990 | * a delta between the current jiffies, this gives a large enough |
6af3fb72 TI |
991 | * delta, effectively to skip the check once. |
992 | */ | |
993 | substream->runtime->hw_ptr_jiffies = jiffies - HZ * 1000; | |
1da177e4 LT |
994 | return substream->ops->trigger(substream, |
995 | push ? SNDRV_PCM_TRIGGER_PAUSE_PUSH : | |
996 | SNDRV_PCM_TRIGGER_PAUSE_RELEASE); | |
997 | } | |
998 | ||
877211f5 | 999 | static void snd_pcm_undo_pause(struct snd_pcm_substream *substream, int push) |
1da177e4 LT |
1000 | { |
1001 | if (substream->runtime->trigger_master == substream) | |
1002 | substream->ops->trigger(substream, | |
1003 | push ? SNDRV_PCM_TRIGGER_PAUSE_RELEASE : | |
1004 | SNDRV_PCM_TRIGGER_PAUSE_PUSH); | |
1005 | } | |
1006 | ||
877211f5 | 1007 | static void snd_pcm_post_pause(struct snd_pcm_substream *substream, int push) |
1da177e4 | 1008 | { |
877211f5 | 1009 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1010 | snd_pcm_trigger_tstamp(substream); |
1011 | if (push) { | |
1012 | runtime->status->state = SNDRV_PCM_STATE_PAUSED; | |
1013 | if (substream->timer) | |
877211f5 TI |
1014 | snd_timer_notify(substream->timer, |
1015 | SNDRV_TIMER_EVENT_MPAUSE, | |
1016 | &runtime->trigger_tstamp); | |
1da177e4 | 1017 | wake_up(&runtime->sleep); |
c91a988d | 1018 | wake_up(&runtime->tsleep); |
1da177e4 LT |
1019 | } else { |
1020 | runtime->status->state = SNDRV_PCM_STATE_RUNNING; | |
1da177e4 | 1021 | if (substream->timer) |
877211f5 TI |
1022 | snd_timer_notify(substream->timer, |
1023 | SNDRV_TIMER_EVENT_MCONTINUE, | |
1024 | &runtime->trigger_tstamp); | |
1da177e4 LT |
1025 | } |
1026 | } | |
1027 | ||
1028 | static struct action_ops snd_pcm_action_pause = { | |
1029 | .pre_action = snd_pcm_pre_pause, | |
1030 | .do_action = snd_pcm_do_pause, | |
1031 | .undo_action = snd_pcm_undo_pause, | |
1032 | .post_action = snd_pcm_post_pause | |
1033 | }; | |
1034 | ||
1035 | /* | |
1036 | * Push/release the pause for all linked streams. | |
1037 | */ | |
877211f5 | 1038 | static int snd_pcm_pause(struct snd_pcm_substream *substream, int push) |
1da177e4 LT |
1039 | { |
1040 | return snd_pcm_action(&snd_pcm_action_pause, substream, push); | |
1041 | } | |
1042 | ||
1043 | #ifdef CONFIG_PM | |
1044 | /* suspend */ | |
1045 | ||
877211f5 | 1046 | static int snd_pcm_pre_suspend(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1047 | { |
877211f5 | 1048 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1049 | if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) |
1050 | return -EBUSY; | |
1051 | runtime->trigger_master = substream; | |
1052 | return 0; | |
1053 | } | |
1054 | ||
877211f5 | 1055 | static int snd_pcm_do_suspend(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1056 | { |
877211f5 | 1057 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1058 | if (runtime->trigger_master != substream) |
1059 | return 0; | |
1060 | if (! snd_pcm_running(substream)) | |
1061 | return 0; | |
1062 | substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND); | |
1063 | return 0; /* suspend unconditionally */ | |
1064 | } | |
1065 | ||
877211f5 | 1066 | static void snd_pcm_post_suspend(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1067 | { |
877211f5 | 1068 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1069 | snd_pcm_trigger_tstamp(substream); |
1070 | if (substream->timer) | |
877211f5 TI |
1071 | snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSUSPEND, |
1072 | &runtime->trigger_tstamp); | |
1da177e4 LT |
1073 | runtime->status->suspended_state = runtime->status->state; |
1074 | runtime->status->state = SNDRV_PCM_STATE_SUSPENDED; | |
1da177e4 | 1075 | wake_up(&runtime->sleep); |
c91a988d | 1076 | wake_up(&runtime->tsleep); |
1da177e4 LT |
1077 | } |
1078 | ||
1079 | static struct action_ops snd_pcm_action_suspend = { | |
1080 | .pre_action = snd_pcm_pre_suspend, | |
1081 | .do_action = snd_pcm_do_suspend, | |
1082 | .post_action = snd_pcm_post_suspend | |
1083 | }; | |
1084 | ||
1085 | /** | |
1c85cc64 | 1086 | * snd_pcm_suspend - trigger SUSPEND to all linked streams |
df8db936 | 1087 | * @substream: the PCM substream |
1da177e4 | 1088 | * |
1da177e4 LT |
1089 | * After this call, all streams are changed to SUSPENDED state. |
1090 | */ | |
877211f5 | 1091 | int snd_pcm_suspend(struct snd_pcm_substream *substream) |
1da177e4 LT |
1092 | { |
1093 | int err; | |
1094 | unsigned long flags; | |
1095 | ||
603bf524 TI |
1096 | if (! substream) |
1097 | return 0; | |
1098 | ||
1da177e4 LT |
1099 | snd_pcm_stream_lock_irqsave(substream, flags); |
1100 | err = snd_pcm_action(&snd_pcm_action_suspend, substream, 0); | |
1101 | snd_pcm_stream_unlock_irqrestore(substream, flags); | |
1102 | return err; | |
1103 | } | |
1104 | ||
e88e8ae6 TI |
1105 | EXPORT_SYMBOL(snd_pcm_suspend); |
1106 | ||
1da177e4 | 1107 | /** |
1c85cc64 | 1108 | * snd_pcm_suspend_all - trigger SUSPEND to all substreams in the given pcm |
df8db936 | 1109 | * @pcm: the PCM instance |
1da177e4 | 1110 | * |
1da177e4 LT |
1111 | * After this call, all streams are changed to SUSPENDED state. |
1112 | */ | |
877211f5 | 1113 | int snd_pcm_suspend_all(struct snd_pcm *pcm) |
1da177e4 | 1114 | { |
877211f5 | 1115 | struct snd_pcm_substream *substream; |
1da177e4 LT |
1116 | int stream, err = 0; |
1117 | ||
603bf524 TI |
1118 | if (! pcm) |
1119 | return 0; | |
1120 | ||
1da177e4 | 1121 | for (stream = 0; stream < 2; stream++) { |
877211f5 TI |
1122 | for (substream = pcm->streams[stream].substream; |
1123 | substream; substream = substream->next) { | |
1da177e4 LT |
1124 | /* FIXME: the open/close code should lock this as well */ |
1125 | if (substream->runtime == NULL) | |
1126 | continue; | |
1127 | err = snd_pcm_suspend(substream); | |
1128 | if (err < 0 && err != -EBUSY) | |
1129 | return err; | |
1130 | } | |
1131 | } | |
1132 | return 0; | |
1133 | } | |
1134 | ||
e88e8ae6 TI |
1135 | EXPORT_SYMBOL(snd_pcm_suspend_all); |
1136 | ||
1da177e4 LT |
1137 | /* resume */ |
1138 | ||
877211f5 | 1139 | static int snd_pcm_pre_resume(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1140 | { |
877211f5 | 1141 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1142 | if (!(runtime->info & SNDRV_PCM_INFO_RESUME)) |
1143 | return -ENOSYS; | |
1144 | runtime->trigger_master = substream; | |
1145 | return 0; | |
1146 | } | |
1147 | ||
877211f5 | 1148 | static int snd_pcm_do_resume(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1149 | { |
877211f5 | 1150 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1151 | if (runtime->trigger_master != substream) |
1152 | return 0; | |
1153 | /* DMA not running previously? */ | |
1154 | if (runtime->status->suspended_state != SNDRV_PCM_STATE_RUNNING && | |
1155 | (runtime->status->suspended_state != SNDRV_PCM_STATE_DRAINING || | |
1156 | substream->stream != SNDRV_PCM_STREAM_PLAYBACK)) | |
1157 | return 0; | |
1158 | return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_RESUME); | |
1159 | } | |
1160 | ||
877211f5 | 1161 | static void snd_pcm_undo_resume(struct snd_pcm_substream *substream, int state) |
1da177e4 LT |
1162 | { |
1163 | if (substream->runtime->trigger_master == substream && | |
1164 | snd_pcm_running(substream)) | |
1165 | substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND); | |
1166 | } | |
1167 | ||
877211f5 | 1168 | static void snd_pcm_post_resume(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1169 | { |
877211f5 | 1170 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1171 | snd_pcm_trigger_tstamp(substream); |
1172 | if (substream->timer) | |
877211f5 TI |
1173 | snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MRESUME, |
1174 | &runtime->trigger_tstamp); | |
1da177e4 | 1175 | runtime->status->state = runtime->status->suspended_state; |
1da177e4 LT |
1176 | } |
1177 | ||
1178 | static struct action_ops snd_pcm_action_resume = { | |
1179 | .pre_action = snd_pcm_pre_resume, | |
1180 | .do_action = snd_pcm_do_resume, | |
1181 | .undo_action = snd_pcm_undo_resume, | |
1182 | .post_action = snd_pcm_post_resume | |
1183 | }; | |
1184 | ||
877211f5 | 1185 | static int snd_pcm_resume(struct snd_pcm_substream *substream) |
1da177e4 | 1186 | { |
877211f5 | 1187 | struct snd_card *card = substream->pcm->card; |
1da177e4 LT |
1188 | int res; |
1189 | ||
1190 | snd_power_lock(card); | |
cbac4b0c | 1191 | if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0) |
1da177e4 LT |
1192 | res = snd_pcm_action_lock_irq(&snd_pcm_action_resume, substream, 0); |
1193 | snd_power_unlock(card); | |
1194 | return res; | |
1195 | } | |
1196 | ||
1197 | #else | |
1198 | ||
877211f5 | 1199 | static int snd_pcm_resume(struct snd_pcm_substream *substream) |
1da177e4 LT |
1200 | { |
1201 | return -ENOSYS; | |
1202 | } | |
1203 | ||
1204 | #endif /* CONFIG_PM */ | |
1205 | ||
1206 | /* | |
1207 | * xrun ioctl | |
1208 | * | |
1209 | * Change the RUNNING stream(s) to XRUN state. | |
1210 | */ | |
877211f5 | 1211 | static int snd_pcm_xrun(struct snd_pcm_substream *substream) |
1da177e4 | 1212 | { |
877211f5 TI |
1213 | struct snd_card *card = substream->pcm->card; |
1214 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1da177e4 LT |
1215 | int result; |
1216 | ||
1217 | snd_power_lock(card); | |
1218 | if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { | |
cbac4b0c | 1219 | result = snd_power_wait(card, SNDRV_CTL_POWER_D0); |
1da177e4 LT |
1220 | if (result < 0) |
1221 | goto _unlock; | |
1222 | } | |
1223 | ||
1224 | snd_pcm_stream_lock_irq(substream); | |
1225 | switch (runtime->status->state) { | |
1226 | case SNDRV_PCM_STATE_XRUN: | |
1227 | result = 0; /* already there */ | |
1228 | break; | |
1229 | case SNDRV_PCM_STATE_RUNNING: | |
1230 | result = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN); | |
1231 | break; | |
1232 | default: | |
1233 | result = -EBADFD; | |
1234 | } | |
1235 | snd_pcm_stream_unlock_irq(substream); | |
1236 | _unlock: | |
1237 | snd_power_unlock(card); | |
1238 | return result; | |
1239 | } | |
1240 | ||
1241 | /* | |
1242 | * reset ioctl | |
1243 | */ | |
877211f5 | 1244 | static int snd_pcm_pre_reset(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1245 | { |
877211f5 | 1246 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1247 | switch (runtime->status->state) { |
1248 | case SNDRV_PCM_STATE_RUNNING: | |
1249 | case SNDRV_PCM_STATE_PREPARED: | |
1250 | case SNDRV_PCM_STATE_PAUSED: | |
1251 | case SNDRV_PCM_STATE_SUSPENDED: | |
1252 | return 0; | |
1253 | default: | |
1254 | return -EBADFD; | |
1255 | } | |
1256 | } | |
1257 | ||
877211f5 | 1258 | static int snd_pcm_do_reset(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1259 | { |
877211f5 | 1260 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1261 | int err = substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL); |
1262 | if (err < 0) | |
1263 | return err; | |
1da177e4 | 1264 | runtime->hw_ptr_base = 0; |
e7636925 JK |
1265 | runtime->hw_ptr_interrupt = runtime->status->hw_ptr - |
1266 | runtime->status->hw_ptr % runtime->period_size; | |
1da177e4 LT |
1267 | runtime->silence_start = runtime->status->hw_ptr; |
1268 | runtime->silence_filled = 0; | |
1269 | return 0; | |
1270 | } | |
1271 | ||
877211f5 | 1272 | static void snd_pcm_post_reset(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1273 | { |
877211f5 | 1274 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1275 | runtime->control->appl_ptr = runtime->status->hw_ptr; |
1276 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && | |
1277 | runtime->silence_size > 0) | |
1278 | snd_pcm_playback_silence(substream, ULONG_MAX); | |
1279 | } | |
1280 | ||
1281 | static struct action_ops snd_pcm_action_reset = { | |
1282 | .pre_action = snd_pcm_pre_reset, | |
1283 | .do_action = snd_pcm_do_reset, | |
1284 | .post_action = snd_pcm_post_reset | |
1285 | }; | |
1286 | ||
877211f5 | 1287 | static int snd_pcm_reset(struct snd_pcm_substream *substream) |
1da177e4 LT |
1288 | { |
1289 | return snd_pcm_action_nonatomic(&snd_pcm_action_reset, substream, 0); | |
1290 | } | |
1291 | ||
1292 | /* | |
1293 | * prepare ioctl | |
1294 | */ | |
0df63e44 TI |
1295 | /* we use the second argument for updating f_flags */ |
1296 | static int snd_pcm_pre_prepare(struct snd_pcm_substream *substream, | |
1297 | int f_flags) | |
1da177e4 | 1298 | { |
877211f5 | 1299 | struct snd_pcm_runtime *runtime = substream->runtime; |
de1b8b93 TI |
1300 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN || |
1301 | runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED) | |
1da177e4 LT |
1302 | return -EBADFD; |
1303 | if (snd_pcm_running(substream)) | |
1304 | return -EBUSY; | |
0df63e44 | 1305 | substream->f_flags = f_flags; |
1da177e4 LT |
1306 | return 0; |
1307 | } | |
1308 | ||
877211f5 | 1309 | static int snd_pcm_do_prepare(struct snd_pcm_substream *substream, int state) |
1da177e4 LT |
1310 | { |
1311 | int err; | |
1312 | err = substream->ops->prepare(substream); | |
1313 | if (err < 0) | |
1314 | return err; | |
1315 | return snd_pcm_do_reset(substream, 0); | |
1316 | } | |
1317 | ||
877211f5 | 1318 | static void snd_pcm_post_prepare(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1319 | { |
877211f5 | 1320 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1321 | runtime->control->appl_ptr = runtime->status->hw_ptr; |
1322 | runtime->status->state = SNDRV_PCM_STATE_PREPARED; | |
1323 | } | |
1324 | ||
1325 | static struct action_ops snd_pcm_action_prepare = { | |
1326 | .pre_action = snd_pcm_pre_prepare, | |
1327 | .do_action = snd_pcm_do_prepare, | |
1328 | .post_action = snd_pcm_post_prepare | |
1329 | }; | |
1330 | ||
1331 | /** | |
1c85cc64 | 1332 | * snd_pcm_prepare - prepare the PCM substream to be triggerable |
df8db936 | 1333 | * @substream: the PCM substream instance |
0df63e44 | 1334 | * @file: file to refer f_flags |
1da177e4 | 1335 | */ |
0df63e44 TI |
1336 | static int snd_pcm_prepare(struct snd_pcm_substream *substream, |
1337 | struct file *file) | |
1da177e4 LT |
1338 | { |
1339 | int res; | |
877211f5 | 1340 | struct snd_card *card = substream->pcm->card; |
0df63e44 TI |
1341 | int f_flags; |
1342 | ||
1343 | if (file) | |
1344 | f_flags = file->f_flags; | |
1345 | else | |
1346 | f_flags = substream->f_flags; | |
1da177e4 LT |
1347 | |
1348 | snd_power_lock(card); | |
cbac4b0c | 1349 | if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0) |
0df63e44 TI |
1350 | res = snd_pcm_action_nonatomic(&snd_pcm_action_prepare, |
1351 | substream, f_flags); | |
1da177e4 LT |
1352 | snd_power_unlock(card); |
1353 | return res; | |
1354 | } | |
1355 | ||
1356 | /* | |
1357 | * drain ioctl | |
1358 | */ | |
1359 | ||
877211f5 | 1360 | static int snd_pcm_pre_drain_init(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1361 | { |
1da177e4 LT |
1362 | substream->runtime->trigger_master = substream; |
1363 | return 0; | |
1364 | } | |
1365 | ||
877211f5 | 1366 | static int snd_pcm_do_drain_init(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1367 | { |
877211f5 | 1368 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1369 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { |
1370 | switch (runtime->status->state) { | |
1371 | case SNDRV_PCM_STATE_PREPARED: | |
1372 | /* start playback stream if possible */ | |
1373 | if (! snd_pcm_playback_empty(substream)) { | |
1374 | snd_pcm_do_start(substream, SNDRV_PCM_STATE_DRAINING); | |
1375 | snd_pcm_post_start(substream, SNDRV_PCM_STATE_DRAINING); | |
1376 | } | |
1377 | break; | |
1378 | case SNDRV_PCM_STATE_RUNNING: | |
1379 | runtime->status->state = SNDRV_PCM_STATE_DRAINING; | |
1380 | break; | |
1381 | default: | |
1382 | break; | |
1383 | } | |
1384 | } else { | |
1385 | /* stop running stream */ | |
1386 | if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) { | |
b05e5787 | 1387 | int new_state = snd_pcm_capture_avail(runtime) > 0 ? |
1da177e4 | 1388 | SNDRV_PCM_STATE_DRAINING : SNDRV_PCM_STATE_SETUP; |
b05e5787 MŚ |
1389 | snd_pcm_do_stop(substream, new_state); |
1390 | snd_pcm_post_stop(substream, new_state); | |
1da177e4 LT |
1391 | } |
1392 | } | |
1393 | return 0; | |
1394 | } | |
1395 | ||
877211f5 | 1396 | static void snd_pcm_post_drain_init(struct snd_pcm_substream *substream, int state) |
1da177e4 LT |
1397 | { |
1398 | } | |
1399 | ||
1400 | static struct action_ops snd_pcm_action_drain_init = { | |
1401 | .pre_action = snd_pcm_pre_drain_init, | |
1402 | .do_action = snd_pcm_do_drain_init, | |
1403 | .post_action = snd_pcm_post_drain_init | |
1404 | }; | |
1405 | ||
877211f5 | 1406 | static int snd_pcm_drop(struct snd_pcm_substream *substream); |
1da177e4 LT |
1407 | |
1408 | /* | |
1409 | * Drain the stream(s). | |
1410 | * When the substream is linked, sync until the draining of all playback streams | |
1411 | * is finished. | |
1412 | * After this call, all streams are supposed to be either SETUP or DRAINING | |
1413 | * (capture only) state. | |
1414 | */ | |
4cdc115f TI |
1415 | static int snd_pcm_drain(struct snd_pcm_substream *substream, |
1416 | struct file *file) | |
1da177e4 | 1417 | { |
877211f5 TI |
1418 | struct snd_card *card; |
1419 | struct snd_pcm_runtime *runtime; | |
ef991b95 | 1420 | struct snd_pcm_substream *s; |
d3a7dcfe | 1421 | wait_queue_t wait; |
1da177e4 | 1422 | int result = 0; |
4cdc115f | 1423 | int nonblock = 0; |
1da177e4 | 1424 | |
1da177e4 LT |
1425 | card = substream->pcm->card; |
1426 | runtime = substream->runtime; | |
1427 | ||
1428 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) | |
1429 | return -EBADFD; | |
1430 | ||
1da177e4 LT |
1431 | snd_power_lock(card); |
1432 | if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { | |
cbac4b0c | 1433 | result = snd_power_wait(card, SNDRV_CTL_POWER_D0); |
21cb2a2e TI |
1434 | if (result < 0) { |
1435 | snd_power_unlock(card); | |
1436 | return result; | |
1437 | } | |
1da177e4 LT |
1438 | } |
1439 | ||
4cdc115f TI |
1440 | if (file) { |
1441 | if (file->f_flags & O_NONBLOCK) | |
1442 | nonblock = 1; | |
1443 | } else if (substream->f_flags & O_NONBLOCK) | |
1444 | nonblock = 1; | |
1445 | ||
21cb2a2e | 1446 | down_read(&snd_pcm_link_rwsem); |
21cb2a2e TI |
1447 | snd_pcm_stream_lock_irq(substream); |
1448 | /* resume pause */ | |
d3a7dcfe | 1449 | if (runtime->status->state == SNDRV_PCM_STATE_PAUSED) |
21cb2a2e TI |
1450 | snd_pcm_pause(substream, 0); |
1451 | ||
1452 | /* pre-start/stop - all running streams are changed to DRAINING state */ | |
1453 | result = snd_pcm_action(&snd_pcm_action_drain_init, substream, 0); | |
4cdc115f TI |
1454 | if (result < 0) |
1455 | goto unlock; | |
1456 | /* in non-blocking, we don't wait in ioctl but let caller poll */ | |
1457 | if (nonblock) { | |
1458 | result = -EAGAIN; | |
1459 | goto unlock; | |
21cb2a2e | 1460 | } |
1da177e4 LT |
1461 | |
1462 | for (;;) { | |
1463 | long tout; | |
d3a7dcfe | 1464 | struct snd_pcm_runtime *to_check; |
1da177e4 LT |
1465 | if (signal_pending(current)) { |
1466 | result = -ERESTARTSYS; | |
1467 | break; | |
1468 | } | |
d3a7dcfe TI |
1469 | /* find a substream to drain */ |
1470 | to_check = NULL; | |
1471 | snd_pcm_group_for_each_entry(s, substream) { | |
1472 | if (s->stream != SNDRV_PCM_STREAM_PLAYBACK) | |
1473 | continue; | |
1474 | runtime = s->runtime; | |
1475 | if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) { | |
1476 | to_check = runtime; | |
21cb2a2e | 1477 | break; |
d3a7dcfe | 1478 | } |
21cb2a2e | 1479 | } |
d3a7dcfe TI |
1480 | if (!to_check) |
1481 | break; /* all drained */ | |
1482 | init_waitqueue_entry(&wait, current); | |
1483 | add_wait_queue(&to_check->sleep, &wait); | |
1da177e4 | 1484 | snd_pcm_stream_unlock_irq(substream); |
d3a7dcfe | 1485 | up_read(&snd_pcm_link_rwsem); |
1da177e4 | 1486 | snd_power_unlock(card); |
f2b3614c TI |
1487 | if (runtime->no_period_wakeup) |
1488 | tout = MAX_SCHEDULE_TIMEOUT; | |
1489 | else { | |
1490 | tout = 10; | |
1491 | if (runtime->rate) { | |
1492 | long t = runtime->period_size * 2 / runtime->rate; | |
1493 | tout = max(t, tout); | |
1494 | } | |
1495 | tout = msecs_to_jiffies(tout * 1000); | |
1496 | } | |
1497 | tout = schedule_timeout_interruptible(tout); | |
1da177e4 | 1498 | snd_power_lock(card); |
d3a7dcfe | 1499 | down_read(&snd_pcm_link_rwsem); |
1da177e4 | 1500 | snd_pcm_stream_lock_irq(substream); |
d3a7dcfe | 1501 | remove_wait_queue(&to_check->sleep, &wait); |
1da177e4 LT |
1502 | if (tout == 0) { |
1503 | if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) | |
1504 | result = -ESTRPIPE; | |
1505 | else { | |
1506 | snd_printd("playback drain error (DMA or IRQ trouble?)\n"); | |
1507 | snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP); | |
1508 | result = -EIO; | |
1509 | } | |
1510 | break; | |
1511 | } | |
1da177e4 | 1512 | } |
21cb2a2e | 1513 | |
4cdc115f | 1514 | unlock: |
21cb2a2e | 1515 | snd_pcm_stream_unlock_irq(substream); |
d3a7dcfe | 1516 | up_read(&snd_pcm_link_rwsem); |
1da177e4 | 1517 | snd_power_unlock(card); |
1da177e4 LT |
1518 | |
1519 | return result; | |
1520 | } | |
1521 | ||
1522 | /* | |
1523 | * drop ioctl | |
1524 | * | |
1525 | * Immediately put all linked substreams into SETUP state. | |
1526 | */ | |
877211f5 | 1527 | static int snd_pcm_drop(struct snd_pcm_substream *substream) |
1da177e4 | 1528 | { |
877211f5 | 1529 | struct snd_pcm_runtime *runtime; |
1da177e4 LT |
1530 | int result = 0; |
1531 | ||
7eaa943c TI |
1532 | if (PCM_RUNTIME_CHECK(substream)) |
1533 | return -ENXIO; | |
1da177e4 | 1534 | runtime = substream->runtime; |
1da177e4 | 1535 | |
de1b8b93 | 1536 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN || |
24e8fc49 TI |
1537 | runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED || |
1538 | runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) | |
1da177e4 LT |
1539 | return -EBADFD; |
1540 | ||
1da177e4 LT |
1541 | snd_pcm_stream_lock_irq(substream); |
1542 | /* resume pause */ | |
1543 | if (runtime->status->state == SNDRV_PCM_STATE_PAUSED) | |
1544 | snd_pcm_pause(substream, 0); | |
1545 | ||
1546 | snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP); | |
1547 | /* runtime->control->appl_ptr = runtime->status->hw_ptr; */ | |
1548 | snd_pcm_stream_unlock_irq(substream); | |
24e8fc49 | 1549 | |
1da177e4 LT |
1550 | return result; |
1551 | } | |
1552 | ||
1553 | ||
1554 | /* WARNING: Don't forget to fput back the file */ | |
1da177e4 LT |
1555 | static struct file *snd_pcm_file_fd(int fd) |
1556 | { | |
1557 | struct file *file; | |
1558 | struct inode *inode; | |
f87135f5 CL |
1559 | unsigned int minor; |
1560 | ||
1da177e4 LT |
1561 | file = fget(fd); |
1562 | if (!file) | |
1563 | return NULL; | |
7bc56323 | 1564 | inode = file->f_path.dentry->d_inode; |
1da177e4 LT |
1565 | if (!S_ISCHR(inode->i_mode) || |
1566 | imajor(inode) != snd_major) { | |
1567 | fput(file); | |
1568 | return NULL; | |
1569 | } | |
1570 | minor = iminor(inode); | |
f87135f5 CL |
1571 | if (!snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_PLAYBACK) && |
1572 | !snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_CAPTURE)) { | |
1da177e4 LT |
1573 | fput(file); |
1574 | return NULL; | |
1575 | } | |
1576 | return file; | |
1577 | } | |
1578 | ||
1579 | /* | |
1580 | * PCM link handling | |
1581 | */ | |
877211f5 | 1582 | static int snd_pcm_link(struct snd_pcm_substream *substream, int fd) |
1da177e4 LT |
1583 | { |
1584 | int res = 0; | |
1585 | struct file *file; | |
877211f5 TI |
1586 | struct snd_pcm_file *pcm_file; |
1587 | struct snd_pcm_substream *substream1; | |
1da177e4 LT |
1588 | |
1589 | file = snd_pcm_file_fd(fd); | |
1590 | if (!file) | |
1591 | return -EBADFD; | |
1592 | pcm_file = file->private_data; | |
1593 | substream1 = pcm_file->substream; | |
1594 | down_write(&snd_pcm_link_rwsem); | |
1595 | write_lock_irq(&snd_pcm_link_rwlock); | |
1596 | if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN || | |
1597 | substream->runtime->status->state != substream1->runtime->status->state) { | |
1598 | res = -EBADFD; | |
1599 | goto _end; | |
1600 | } | |
1601 | if (snd_pcm_stream_linked(substream1)) { | |
1602 | res = -EALREADY; | |
1603 | goto _end; | |
1604 | } | |
1605 | if (!snd_pcm_stream_linked(substream)) { | |
877211f5 | 1606 | substream->group = kmalloc(sizeof(struct snd_pcm_group), GFP_ATOMIC); |
1da177e4 LT |
1607 | if (substream->group == NULL) { |
1608 | res = -ENOMEM; | |
1609 | goto _end; | |
1610 | } | |
1611 | spin_lock_init(&substream->group->lock); | |
1612 | INIT_LIST_HEAD(&substream->group->substreams); | |
1613 | list_add_tail(&substream->link_list, &substream->group->substreams); | |
1614 | substream->group->count = 1; | |
1615 | } | |
1616 | list_add_tail(&substream1->link_list, &substream->group->substreams); | |
1617 | substream->group->count++; | |
1618 | substream1->group = substream->group; | |
1619 | _end: | |
1620 | write_unlock_irq(&snd_pcm_link_rwlock); | |
1621 | up_write(&snd_pcm_link_rwsem); | |
1622 | fput(file); | |
1623 | return res; | |
1624 | } | |
1625 | ||
877211f5 | 1626 | static void relink_to_local(struct snd_pcm_substream *substream) |
1da177e4 LT |
1627 | { |
1628 | substream->group = &substream->self_group; | |
1629 | INIT_LIST_HEAD(&substream->self_group.substreams); | |
1630 | list_add_tail(&substream->link_list, &substream->self_group.substreams); | |
1631 | } | |
1632 | ||
877211f5 | 1633 | static int snd_pcm_unlink(struct snd_pcm_substream *substream) |
1da177e4 | 1634 | { |
ef991b95 | 1635 | struct snd_pcm_substream *s; |
1da177e4 LT |
1636 | int res = 0; |
1637 | ||
1638 | down_write(&snd_pcm_link_rwsem); | |
1639 | write_lock_irq(&snd_pcm_link_rwlock); | |
1640 | if (!snd_pcm_stream_linked(substream)) { | |
1641 | res = -EALREADY; | |
1642 | goto _end; | |
1643 | } | |
1644 | list_del(&substream->link_list); | |
1645 | substream->group->count--; | |
1646 | if (substream->group->count == 1) { /* detach the last stream, too */ | |
ef991b95 TI |
1647 | snd_pcm_group_for_each_entry(s, substream) { |
1648 | relink_to_local(s); | |
1da177e4 LT |
1649 | break; |
1650 | } | |
1651 | kfree(substream->group); | |
1652 | } | |
1653 | relink_to_local(substream); | |
1654 | _end: | |
1655 | write_unlock_irq(&snd_pcm_link_rwlock); | |
1656 | up_write(&snd_pcm_link_rwsem); | |
1657 | return res; | |
1658 | } | |
1659 | ||
1660 | /* | |
1661 | * hw configurator | |
1662 | */ | |
877211f5 TI |
1663 | static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params *params, |
1664 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 1665 | { |
877211f5 | 1666 | struct snd_interval t; |
1da177e4 LT |
1667 | snd_interval_mul(hw_param_interval_c(params, rule->deps[0]), |
1668 | hw_param_interval_c(params, rule->deps[1]), &t); | |
1669 | return snd_interval_refine(hw_param_interval(params, rule->var), &t); | |
1670 | } | |
1671 | ||
877211f5 TI |
1672 | static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params *params, |
1673 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 1674 | { |
877211f5 | 1675 | struct snd_interval t; |
1da177e4 LT |
1676 | snd_interval_div(hw_param_interval_c(params, rule->deps[0]), |
1677 | hw_param_interval_c(params, rule->deps[1]), &t); | |
1678 | return snd_interval_refine(hw_param_interval(params, rule->var), &t); | |
1679 | } | |
1680 | ||
877211f5 TI |
1681 | static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params *params, |
1682 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 1683 | { |
877211f5 | 1684 | struct snd_interval t; |
1da177e4 LT |
1685 | snd_interval_muldivk(hw_param_interval_c(params, rule->deps[0]), |
1686 | hw_param_interval_c(params, rule->deps[1]), | |
1687 | (unsigned long) rule->private, &t); | |
1688 | return snd_interval_refine(hw_param_interval(params, rule->var), &t); | |
1689 | } | |
1690 | ||
877211f5 TI |
1691 | static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params *params, |
1692 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 1693 | { |
877211f5 | 1694 | struct snd_interval t; |
1da177e4 LT |
1695 | snd_interval_mulkdiv(hw_param_interval_c(params, rule->deps[0]), |
1696 | (unsigned long) rule->private, | |
1697 | hw_param_interval_c(params, rule->deps[1]), &t); | |
1698 | return snd_interval_refine(hw_param_interval(params, rule->var), &t); | |
1699 | } | |
1700 | ||
877211f5 TI |
1701 | static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params *params, |
1702 | struct snd_pcm_hw_rule *rule) | |
1da177e4 LT |
1703 | { |
1704 | unsigned int k; | |
877211f5 TI |
1705 | struct snd_interval *i = hw_param_interval(params, rule->deps[0]); |
1706 | struct snd_mask m; | |
1707 | struct snd_mask *mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); | |
1da177e4 LT |
1708 | snd_mask_any(&m); |
1709 | for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) { | |
1710 | int bits; | |
1711 | if (! snd_mask_test(mask, k)) | |
1712 | continue; | |
1713 | bits = snd_pcm_format_physical_width(k); | |
1714 | if (bits <= 0) | |
1715 | continue; /* ignore invalid formats */ | |
1716 | if ((unsigned)bits < i->min || (unsigned)bits > i->max) | |
1717 | snd_mask_reset(&m, k); | |
1718 | } | |
1719 | return snd_mask_refine(mask, &m); | |
1720 | } | |
1721 | ||
877211f5 TI |
1722 | static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params *params, |
1723 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 1724 | { |
877211f5 | 1725 | struct snd_interval t; |
1da177e4 LT |
1726 | unsigned int k; |
1727 | t.min = UINT_MAX; | |
1728 | t.max = 0; | |
1729 | t.openmin = 0; | |
1730 | t.openmax = 0; | |
1731 | for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) { | |
1732 | int bits; | |
1733 | if (! snd_mask_test(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), k)) | |
1734 | continue; | |
1735 | bits = snd_pcm_format_physical_width(k); | |
1736 | if (bits <= 0) | |
1737 | continue; /* ignore invalid formats */ | |
1738 | if (t.min > (unsigned)bits) | |
1739 | t.min = bits; | |
1740 | if (t.max < (unsigned)bits) | |
1741 | t.max = bits; | |
1742 | } | |
1743 | t.integer = 1; | |
1744 | return snd_interval_refine(hw_param_interval(params, rule->var), &t); | |
1745 | } | |
1746 | ||
1747 | #if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12 | |
1748 | #error "Change this table" | |
1749 | #endif | |
1750 | ||
1751 | static unsigned int rates[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100, | |
1752 | 48000, 64000, 88200, 96000, 176400, 192000 }; | |
1753 | ||
7653d557 CL |
1754 | const struct snd_pcm_hw_constraint_list snd_pcm_known_rates = { |
1755 | .count = ARRAY_SIZE(rates), | |
1756 | .list = rates, | |
1757 | }; | |
1758 | ||
877211f5 TI |
1759 | static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params *params, |
1760 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 1761 | { |
877211f5 | 1762 | struct snd_pcm_hardware *hw = rule->private; |
1da177e4 | 1763 | return snd_interval_list(hw_param_interval(params, rule->var), |
7653d557 CL |
1764 | snd_pcm_known_rates.count, |
1765 | snd_pcm_known_rates.list, hw->rates); | |
1da177e4 LT |
1766 | } |
1767 | ||
877211f5 TI |
1768 | static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params *params, |
1769 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 1770 | { |
877211f5 TI |
1771 | struct snd_interval t; |
1772 | struct snd_pcm_substream *substream = rule->private; | |
1da177e4 LT |
1773 | t.min = 0; |
1774 | t.max = substream->buffer_bytes_max; | |
1775 | t.openmin = 0; | |
1776 | t.openmax = 0; | |
1777 | t.integer = 1; | |
1778 | return snd_interval_refine(hw_param_interval(params, rule->var), &t); | |
1779 | } | |
1780 | ||
877211f5 | 1781 | int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream) |
1da177e4 | 1782 | { |
877211f5 TI |
1783 | struct snd_pcm_runtime *runtime = substream->runtime; |
1784 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; | |
1da177e4 LT |
1785 | int k, err; |
1786 | ||
1787 | for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) { | |
1788 | snd_mask_any(constrs_mask(constrs, k)); | |
1789 | } | |
1790 | ||
1791 | for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) { | |
1792 | snd_interval_any(constrs_interval(constrs, k)); | |
1793 | } | |
1794 | ||
1795 | snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS)); | |
1796 | snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE)); | |
1797 | snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES)); | |
1798 | snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS)); | |
1799 | snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS)); | |
1800 | ||
1801 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT, | |
1802 | snd_pcm_hw_rule_format, NULL, | |
1803 | SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); | |
1804 | if (err < 0) | |
1805 | return err; | |
1806 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, | |
1807 | snd_pcm_hw_rule_sample_bits, NULL, | |
1808 | SNDRV_PCM_HW_PARAM_FORMAT, | |
1809 | SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); | |
1810 | if (err < 0) | |
1811 | return err; | |
1812 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, | |
1813 | snd_pcm_hw_rule_div, NULL, | |
1814 | SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1); | |
1815 | if (err < 0) | |
1816 | return err; | |
1817 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, | |
1818 | snd_pcm_hw_rule_mul, NULL, | |
1819 | SNDRV_PCM_HW_PARAM_SAMPLE_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1); | |
1820 | if (err < 0) | |
1821 | return err; | |
1822 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, | |
1823 | snd_pcm_hw_rule_mulkdiv, (void*) 8, | |
1824 | SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1); | |
1825 | if (err < 0) | |
1826 | return err; | |
1827 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, | |
1828 | snd_pcm_hw_rule_mulkdiv, (void*) 8, | |
1829 | SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1); | |
1830 | if (err < 0) | |
1831 | return err; | |
1832 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS, | |
1833 | snd_pcm_hw_rule_div, NULL, | |
1834 | SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); | |
1835 | if (err < 0) | |
1836 | return err; | |
1837 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, | |
1838 | snd_pcm_hw_rule_mulkdiv, (void*) 1000000, | |
1839 | SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, -1); | |
1840 | if (err < 0) | |
1841 | return err; | |
1842 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, | |
1843 | snd_pcm_hw_rule_mulkdiv, (void*) 1000000, | |
1844 | SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_BUFFER_TIME, -1); | |
1845 | if (err < 0) | |
1846 | return err; | |
1847 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS, | |
1848 | snd_pcm_hw_rule_div, NULL, | |
1849 | SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1); | |
1850 | if (err < 0) | |
1851 | return err; | |
1852 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, | |
1853 | snd_pcm_hw_rule_div, NULL, | |
1854 | SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1); | |
1855 | if (err < 0) | |
1856 | return err; | |
1857 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, | |
1858 | snd_pcm_hw_rule_mulkdiv, (void*) 8, | |
1859 | SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); | |
1860 | if (err < 0) | |
1861 | return err; | |
1862 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, | |
1863 | snd_pcm_hw_rule_muldivk, (void*) 1000000, | |
1864 | SNDRV_PCM_HW_PARAM_PERIOD_TIME, SNDRV_PCM_HW_PARAM_RATE, -1); | |
1865 | if (err < 0) | |
1866 | return err; | |
1867 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, | |
1868 | snd_pcm_hw_rule_mul, NULL, | |
1869 | SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1); | |
1870 | if (err < 0) | |
1871 | return err; | |
1872 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, | |
1873 | snd_pcm_hw_rule_mulkdiv, (void*) 8, | |
1874 | SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); | |
1875 | if (err < 0) | |
1876 | return err; | |
1877 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, | |
1878 | snd_pcm_hw_rule_muldivk, (void*) 1000000, | |
1879 | SNDRV_PCM_HW_PARAM_BUFFER_TIME, SNDRV_PCM_HW_PARAM_RATE, -1); | |
1880 | if (err < 0) | |
1881 | return err; | |
1882 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, | |
1883 | snd_pcm_hw_rule_muldivk, (void*) 8, | |
1884 | SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); | |
1885 | if (err < 0) | |
1886 | return err; | |
1887 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, | |
1888 | snd_pcm_hw_rule_muldivk, (void*) 8, | |
1889 | SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); | |
1890 | if (err < 0) | |
1891 | return err; | |
1892 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME, | |
1893 | snd_pcm_hw_rule_mulkdiv, (void*) 1000000, | |
1894 | SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1); | |
1895 | if (err < 0) | |
1896 | return err; | |
1897 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME, | |
1898 | snd_pcm_hw_rule_mulkdiv, (void*) 1000000, | |
1899 | SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1); | |
1900 | if (err < 0) | |
1901 | return err; | |
1902 | return 0; | |
1903 | } | |
1904 | ||
877211f5 | 1905 | int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream) |
1da177e4 | 1906 | { |
877211f5 TI |
1907 | struct snd_pcm_runtime *runtime = substream->runtime; |
1908 | struct snd_pcm_hardware *hw = &runtime->hw; | |
1da177e4 LT |
1909 | int err; |
1910 | unsigned int mask = 0; | |
1911 | ||
1912 | if (hw->info & SNDRV_PCM_INFO_INTERLEAVED) | |
1913 | mask |= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED; | |
1914 | if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED) | |
1915 | mask |= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED; | |
1916 | if (hw->info & SNDRV_PCM_INFO_MMAP) { | |
1917 | if (hw->info & SNDRV_PCM_INFO_INTERLEAVED) | |
1918 | mask |= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED; | |
1919 | if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED) | |
1920 | mask |= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED; | |
1921 | if (hw->info & SNDRV_PCM_INFO_COMPLEX) | |
1922 | mask |= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX; | |
1923 | } | |
1924 | err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask); | |
7eaa943c TI |
1925 | if (err < 0) |
1926 | return err; | |
1da177e4 LT |
1927 | |
1928 | err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats); | |
7eaa943c TI |
1929 | if (err < 0) |
1930 | return err; | |
1da177e4 LT |
1931 | |
1932 | err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT, 1 << SNDRV_PCM_SUBFORMAT_STD); | |
7eaa943c TI |
1933 | if (err < 0) |
1934 | return err; | |
1da177e4 LT |
1935 | |
1936 | err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS, | |
1937 | hw->channels_min, hw->channels_max); | |
7eaa943c TI |
1938 | if (err < 0) |
1939 | return err; | |
1da177e4 LT |
1940 | |
1941 | err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE, | |
1942 | hw->rate_min, hw->rate_max); | |
8b90ca08 GL |
1943 | if (err < 0) |
1944 | return err; | |
1da177e4 LT |
1945 | |
1946 | err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, | |
1947 | hw->period_bytes_min, hw->period_bytes_max); | |
8b90ca08 GL |
1948 | if (err < 0) |
1949 | return err; | |
1da177e4 LT |
1950 | |
1951 | err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS, | |
1952 | hw->periods_min, hw->periods_max); | |
7eaa943c TI |
1953 | if (err < 0) |
1954 | return err; | |
1da177e4 LT |
1955 | |
1956 | err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, | |
1957 | hw->period_bytes_min, hw->buffer_bytes_max); | |
7eaa943c TI |
1958 | if (err < 0) |
1959 | return err; | |
1da177e4 LT |
1960 | |
1961 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, | |
1962 | snd_pcm_hw_rule_buffer_bytes_max, substream, | |
1963 | SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1); | |
1964 | if (err < 0) | |
1965 | return err; | |
1966 | ||
1967 | /* FIXME: remove */ | |
1968 | if (runtime->dma_bytes) { | |
1969 | err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes); | |
7eaa943c TI |
1970 | if (err < 0) |
1971 | return -EINVAL; | |
1da177e4 LT |
1972 | } |
1973 | ||
1974 | if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) { | |
1975 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, | |
1976 | snd_pcm_hw_rule_rate, hw, | |
1977 | SNDRV_PCM_HW_PARAM_RATE, -1); | |
1978 | if (err < 0) | |
1979 | return err; | |
1980 | } | |
1981 | ||
1982 | /* FIXME: this belong to lowlevel */ | |
1da177e4 LT |
1983 | snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE); |
1984 | ||
1985 | return 0; | |
1986 | } | |
1987 | ||
3bf75f9b | 1988 | static void pcm_release_private(struct snd_pcm_substream *substream) |
1da177e4 | 1989 | { |
1da177e4 | 1990 | snd_pcm_unlink(substream); |
3bf75f9b TI |
1991 | } |
1992 | ||
1993 | void snd_pcm_release_substream(struct snd_pcm_substream *substream) | |
1994 | { | |
0df63e44 TI |
1995 | substream->ref_count--; |
1996 | if (substream->ref_count > 0) | |
1997 | return; | |
1998 | ||
3bf75f9b | 1999 | snd_pcm_drop(substream); |
3bf75f9b | 2000 | if (substream->hw_opened) { |
1da177e4 LT |
2001 | if (substream->ops->hw_free != NULL) |
2002 | substream->ops->hw_free(substream); | |
2003 | substream->ops->close(substream); | |
3bf75f9b | 2004 | substream->hw_opened = 0; |
1da177e4 | 2005 | } |
8699a0b6 TI |
2006 | if (pm_qos_request_active(&substream->latency_pm_qos_req)) |
2007 | pm_qos_remove_request(&substream->latency_pm_qos_req); | |
1576274d TI |
2008 | if (substream->pcm_release) { |
2009 | substream->pcm_release(substream); | |
2010 | substream->pcm_release = NULL; | |
2011 | } | |
3bf75f9b TI |
2012 | snd_pcm_detach_substream(substream); |
2013 | } | |
2014 | ||
e88e8ae6 TI |
2015 | EXPORT_SYMBOL(snd_pcm_release_substream); |
2016 | ||
3bf75f9b TI |
2017 | int snd_pcm_open_substream(struct snd_pcm *pcm, int stream, |
2018 | struct file *file, | |
2019 | struct snd_pcm_substream **rsubstream) | |
2020 | { | |
2021 | struct snd_pcm_substream *substream; | |
2022 | int err; | |
2023 | ||
2024 | err = snd_pcm_attach_substream(pcm, stream, file, &substream); | |
2025 | if (err < 0) | |
2026 | return err; | |
0df63e44 TI |
2027 | if (substream->ref_count > 1) { |
2028 | *rsubstream = substream; | |
2029 | return 0; | |
2030 | } | |
2031 | ||
3bf75f9b TI |
2032 | err = snd_pcm_hw_constraints_init(substream); |
2033 | if (err < 0) { | |
2034 | snd_printd("snd_pcm_hw_constraints_init failed\n"); | |
2035 | goto error; | |
2036 | } | |
2037 | ||
2038 | if ((err = substream->ops->open(substream)) < 0) | |
2039 | goto error; | |
2040 | ||
2041 | substream->hw_opened = 1; | |
2042 | ||
2043 | err = snd_pcm_hw_constraints_complete(substream); | |
2044 | if (err < 0) { | |
2045 | snd_printd("snd_pcm_hw_constraints_complete failed\n"); | |
2046 | goto error; | |
2047 | } | |
2048 | ||
2049 | *rsubstream = substream; | |
1da177e4 | 2050 | return 0; |
3bf75f9b TI |
2051 | |
2052 | error: | |
2053 | snd_pcm_release_substream(substream); | |
2054 | return err; | |
1da177e4 LT |
2055 | } |
2056 | ||
e88e8ae6 TI |
2057 | EXPORT_SYMBOL(snd_pcm_open_substream); |
2058 | ||
1da177e4 | 2059 | static int snd_pcm_open_file(struct file *file, |
877211f5 | 2060 | struct snd_pcm *pcm, |
1da177e4 | 2061 | int stream, |
877211f5 | 2062 | struct snd_pcm_file **rpcm_file) |
1da177e4 | 2063 | { |
877211f5 TI |
2064 | struct snd_pcm_file *pcm_file; |
2065 | struct snd_pcm_substream *substream; | |
3bf75f9b | 2066 | int err; |
1da177e4 | 2067 | |
7eaa943c TI |
2068 | if (rpcm_file) |
2069 | *rpcm_file = NULL; | |
1da177e4 | 2070 | |
3bf75f9b TI |
2071 | err = snd_pcm_open_substream(pcm, stream, file, &substream); |
2072 | if (err < 0) | |
2073 | return err; | |
2074 | ||
548a648b TI |
2075 | pcm_file = kzalloc(sizeof(*pcm_file), GFP_KERNEL); |
2076 | if (pcm_file == NULL) { | |
2077 | snd_pcm_release_substream(substream); | |
2078 | return -ENOMEM; | |
2079 | } | |
2080 | pcm_file->substream = substream; | |
2081 | if (substream->ref_count == 1) { | |
0df63e44 TI |
2082 | substream->file = pcm_file; |
2083 | substream->pcm_release = pcm_release_private; | |
1da177e4 | 2084 | } |
1da177e4 | 2085 | file->private_data = pcm_file; |
7eaa943c TI |
2086 | if (rpcm_file) |
2087 | *rpcm_file = pcm_file; | |
1da177e4 LT |
2088 | return 0; |
2089 | } | |
2090 | ||
f87135f5 CL |
2091 | static int snd_pcm_playback_open(struct inode *inode, struct file *file) |
2092 | { | |
2093 | struct snd_pcm *pcm; | |
02f4865f TI |
2094 | int err = nonseekable_open(inode, file); |
2095 | if (err < 0) | |
2096 | return err; | |
f87135f5 CL |
2097 | pcm = snd_lookup_minor_data(iminor(inode), |
2098 | SNDRV_DEVICE_TYPE_PCM_PLAYBACK); | |
2099 | return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_PLAYBACK); | |
2100 | } | |
2101 | ||
2102 | static int snd_pcm_capture_open(struct inode *inode, struct file *file) | |
1da177e4 | 2103 | { |
877211f5 | 2104 | struct snd_pcm *pcm; |
02f4865f TI |
2105 | int err = nonseekable_open(inode, file); |
2106 | if (err < 0) | |
2107 | return err; | |
f87135f5 CL |
2108 | pcm = snd_lookup_minor_data(iminor(inode), |
2109 | SNDRV_DEVICE_TYPE_PCM_CAPTURE); | |
2110 | return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_CAPTURE); | |
2111 | } | |
2112 | ||
2113 | static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream) | |
2114 | { | |
2115 | int err; | |
877211f5 | 2116 | struct snd_pcm_file *pcm_file; |
1da177e4 LT |
2117 | wait_queue_t wait; |
2118 | ||
1da177e4 LT |
2119 | if (pcm == NULL) { |
2120 | err = -ENODEV; | |
2121 | goto __error1; | |
2122 | } | |
2123 | err = snd_card_file_add(pcm->card, file); | |
2124 | if (err < 0) | |
2125 | goto __error1; | |
2126 | if (!try_module_get(pcm->card->module)) { | |
2127 | err = -EFAULT; | |
2128 | goto __error2; | |
2129 | } | |
2130 | init_waitqueue_entry(&wait, current); | |
2131 | add_wait_queue(&pcm->open_wait, &wait); | |
1a60d4c5 | 2132 | mutex_lock(&pcm->open_mutex); |
1da177e4 | 2133 | while (1) { |
f87135f5 | 2134 | err = snd_pcm_open_file(file, pcm, stream, &pcm_file); |
1da177e4 LT |
2135 | if (err >= 0) |
2136 | break; | |
2137 | if (err == -EAGAIN) { | |
2138 | if (file->f_flags & O_NONBLOCK) { | |
2139 | err = -EBUSY; | |
2140 | break; | |
2141 | } | |
2142 | } else | |
2143 | break; | |
2144 | set_current_state(TASK_INTERRUPTIBLE); | |
1a60d4c5 | 2145 | mutex_unlock(&pcm->open_mutex); |
1da177e4 | 2146 | schedule(); |
1a60d4c5 | 2147 | mutex_lock(&pcm->open_mutex); |
1da177e4 LT |
2148 | if (signal_pending(current)) { |
2149 | err = -ERESTARTSYS; | |
2150 | break; | |
2151 | } | |
2152 | } | |
2153 | remove_wait_queue(&pcm->open_wait, &wait); | |
1a60d4c5 | 2154 | mutex_unlock(&pcm->open_mutex); |
1da177e4 LT |
2155 | if (err < 0) |
2156 | goto __error; | |
2157 | return err; | |
2158 | ||
2159 | __error: | |
2160 | module_put(pcm->card->module); | |
2161 | __error2: | |
2162 | snd_card_file_remove(pcm->card, file); | |
2163 | __error1: | |
2164 | return err; | |
2165 | } | |
2166 | ||
2167 | static int snd_pcm_release(struct inode *inode, struct file *file) | |
2168 | { | |
877211f5 TI |
2169 | struct snd_pcm *pcm; |
2170 | struct snd_pcm_substream *substream; | |
2171 | struct snd_pcm_file *pcm_file; | |
1da177e4 LT |
2172 | |
2173 | pcm_file = file->private_data; | |
2174 | substream = pcm_file->substream; | |
7eaa943c TI |
2175 | if (snd_BUG_ON(!substream)) |
2176 | return -ENXIO; | |
1da177e4 | 2177 | pcm = substream->pcm; |
1a60d4c5 | 2178 | mutex_lock(&pcm->open_mutex); |
3bf75f9b | 2179 | snd_pcm_release_substream(substream); |
548a648b | 2180 | kfree(pcm_file); |
1a60d4c5 | 2181 | mutex_unlock(&pcm->open_mutex); |
1da177e4 LT |
2182 | wake_up(&pcm->open_wait); |
2183 | module_put(pcm->card->module); | |
2184 | snd_card_file_remove(pcm->card, file); | |
2185 | return 0; | |
2186 | } | |
2187 | ||
877211f5 TI |
2188 | static snd_pcm_sframes_t snd_pcm_playback_rewind(struct snd_pcm_substream *substream, |
2189 | snd_pcm_uframes_t frames) | |
1da177e4 | 2190 | { |
877211f5 | 2191 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
2192 | snd_pcm_sframes_t appl_ptr; |
2193 | snd_pcm_sframes_t ret; | |
2194 | snd_pcm_sframes_t hw_avail; | |
2195 | ||
2196 | if (frames == 0) | |
2197 | return 0; | |
2198 | ||
2199 | snd_pcm_stream_lock_irq(substream); | |
2200 | switch (runtime->status->state) { | |
2201 | case SNDRV_PCM_STATE_PREPARED: | |
2202 | break; | |
2203 | case SNDRV_PCM_STATE_DRAINING: | |
2204 | case SNDRV_PCM_STATE_RUNNING: | |
2205 | if (snd_pcm_update_hw_ptr(substream) >= 0) | |
2206 | break; | |
2207 | /* Fall through */ | |
2208 | case SNDRV_PCM_STATE_XRUN: | |
2209 | ret = -EPIPE; | |
2210 | goto __end; | |
51840409 LR |
2211 | case SNDRV_PCM_STATE_SUSPENDED: |
2212 | ret = -ESTRPIPE; | |
2213 | goto __end; | |
1da177e4 LT |
2214 | default: |
2215 | ret = -EBADFD; | |
2216 | goto __end; | |
2217 | } | |
2218 | ||
2219 | hw_avail = snd_pcm_playback_hw_avail(runtime); | |
2220 | if (hw_avail <= 0) { | |
2221 | ret = 0; | |
2222 | goto __end; | |
2223 | } | |
2224 | if (frames > (snd_pcm_uframes_t)hw_avail) | |
2225 | frames = hw_avail; | |
1da177e4 LT |
2226 | appl_ptr = runtime->control->appl_ptr - frames; |
2227 | if (appl_ptr < 0) | |
2228 | appl_ptr += runtime->boundary; | |
2229 | runtime->control->appl_ptr = appl_ptr; | |
1da177e4 LT |
2230 | ret = frames; |
2231 | __end: | |
2232 | snd_pcm_stream_unlock_irq(substream); | |
2233 | return ret; | |
2234 | } | |
2235 | ||
877211f5 TI |
2236 | static snd_pcm_sframes_t snd_pcm_capture_rewind(struct snd_pcm_substream *substream, |
2237 | snd_pcm_uframes_t frames) | |
1da177e4 | 2238 | { |
877211f5 | 2239 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
2240 | snd_pcm_sframes_t appl_ptr; |
2241 | snd_pcm_sframes_t ret; | |
2242 | snd_pcm_sframes_t hw_avail; | |
2243 | ||
2244 | if (frames == 0) | |
2245 | return 0; | |
2246 | ||
2247 | snd_pcm_stream_lock_irq(substream); | |
2248 | switch (runtime->status->state) { | |
2249 | case SNDRV_PCM_STATE_PREPARED: | |
2250 | case SNDRV_PCM_STATE_DRAINING: | |
2251 | break; | |
2252 | case SNDRV_PCM_STATE_RUNNING: | |
2253 | if (snd_pcm_update_hw_ptr(substream) >= 0) | |
2254 | break; | |
2255 | /* Fall through */ | |
2256 | case SNDRV_PCM_STATE_XRUN: | |
2257 | ret = -EPIPE; | |
2258 | goto __end; | |
51840409 LR |
2259 | case SNDRV_PCM_STATE_SUSPENDED: |
2260 | ret = -ESTRPIPE; | |
2261 | goto __end; | |
1da177e4 LT |
2262 | default: |
2263 | ret = -EBADFD; | |
2264 | goto __end; | |
2265 | } | |
2266 | ||
2267 | hw_avail = snd_pcm_capture_hw_avail(runtime); | |
2268 | if (hw_avail <= 0) { | |
2269 | ret = 0; | |
2270 | goto __end; | |
2271 | } | |
2272 | if (frames > (snd_pcm_uframes_t)hw_avail) | |
2273 | frames = hw_avail; | |
1da177e4 LT |
2274 | appl_ptr = runtime->control->appl_ptr - frames; |
2275 | if (appl_ptr < 0) | |
2276 | appl_ptr += runtime->boundary; | |
2277 | runtime->control->appl_ptr = appl_ptr; | |
1da177e4 LT |
2278 | ret = frames; |
2279 | __end: | |
2280 | snd_pcm_stream_unlock_irq(substream); | |
2281 | return ret; | |
2282 | } | |
2283 | ||
877211f5 TI |
2284 | static snd_pcm_sframes_t snd_pcm_playback_forward(struct snd_pcm_substream *substream, |
2285 | snd_pcm_uframes_t frames) | |
1da177e4 | 2286 | { |
877211f5 | 2287 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
2288 | snd_pcm_sframes_t appl_ptr; |
2289 | snd_pcm_sframes_t ret; | |
2290 | snd_pcm_sframes_t avail; | |
2291 | ||
2292 | if (frames == 0) | |
2293 | return 0; | |
2294 | ||
2295 | snd_pcm_stream_lock_irq(substream); | |
2296 | switch (runtime->status->state) { | |
2297 | case SNDRV_PCM_STATE_PREPARED: | |
2298 | case SNDRV_PCM_STATE_PAUSED: | |
2299 | break; | |
2300 | case SNDRV_PCM_STATE_DRAINING: | |
2301 | case SNDRV_PCM_STATE_RUNNING: | |
2302 | if (snd_pcm_update_hw_ptr(substream) >= 0) | |
2303 | break; | |
2304 | /* Fall through */ | |
2305 | case SNDRV_PCM_STATE_XRUN: | |
2306 | ret = -EPIPE; | |
2307 | goto __end; | |
51840409 LR |
2308 | case SNDRV_PCM_STATE_SUSPENDED: |
2309 | ret = -ESTRPIPE; | |
2310 | goto __end; | |
1da177e4 LT |
2311 | default: |
2312 | ret = -EBADFD; | |
2313 | goto __end; | |
2314 | } | |
2315 | ||
2316 | avail = snd_pcm_playback_avail(runtime); | |
2317 | if (avail <= 0) { | |
2318 | ret = 0; | |
2319 | goto __end; | |
2320 | } | |
2321 | if (frames > (snd_pcm_uframes_t)avail) | |
2322 | frames = avail; | |
1da177e4 LT |
2323 | appl_ptr = runtime->control->appl_ptr + frames; |
2324 | if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary) | |
2325 | appl_ptr -= runtime->boundary; | |
2326 | runtime->control->appl_ptr = appl_ptr; | |
1da177e4 LT |
2327 | ret = frames; |
2328 | __end: | |
2329 | snd_pcm_stream_unlock_irq(substream); | |
2330 | return ret; | |
2331 | } | |
2332 | ||
877211f5 TI |
2333 | static snd_pcm_sframes_t snd_pcm_capture_forward(struct snd_pcm_substream *substream, |
2334 | snd_pcm_uframes_t frames) | |
1da177e4 | 2335 | { |
877211f5 | 2336 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
2337 | snd_pcm_sframes_t appl_ptr; |
2338 | snd_pcm_sframes_t ret; | |
2339 | snd_pcm_sframes_t avail; | |
2340 | ||
2341 | if (frames == 0) | |
2342 | return 0; | |
2343 | ||
2344 | snd_pcm_stream_lock_irq(substream); | |
2345 | switch (runtime->status->state) { | |
2346 | case SNDRV_PCM_STATE_PREPARED: | |
2347 | case SNDRV_PCM_STATE_DRAINING: | |
2348 | case SNDRV_PCM_STATE_PAUSED: | |
2349 | break; | |
2350 | case SNDRV_PCM_STATE_RUNNING: | |
2351 | if (snd_pcm_update_hw_ptr(substream) >= 0) | |
2352 | break; | |
2353 | /* Fall through */ | |
2354 | case SNDRV_PCM_STATE_XRUN: | |
2355 | ret = -EPIPE; | |
2356 | goto __end; | |
51840409 LR |
2357 | case SNDRV_PCM_STATE_SUSPENDED: |
2358 | ret = -ESTRPIPE; | |
2359 | goto __end; | |
1da177e4 LT |
2360 | default: |
2361 | ret = -EBADFD; | |
2362 | goto __end; | |
2363 | } | |
2364 | ||
2365 | avail = snd_pcm_capture_avail(runtime); | |
2366 | if (avail <= 0) { | |
2367 | ret = 0; | |
2368 | goto __end; | |
2369 | } | |
2370 | if (frames > (snd_pcm_uframes_t)avail) | |
2371 | frames = avail; | |
1da177e4 LT |
2372 | appl_ptr = runtime->control->appl_ptr + frames; |
2373 | if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary) | |
2374 | appl_ptr -= runtime->boundary; | |
2375 | runtime->control->appl_ptr = appl_ptr; | |
1da177e4 LT |
2376 | ret = frames; |
2377 | __end: | |
2378 | snd_pcm_stream_unlock_irq(substream); | |
2379 | return ret; | |
2380 | } | |
2381 | ||
877211f5 | 2382 | static int snd_pcm_hwsync(struct snd_pcm_substream *substream) |
1da177e4 | 2383 | { |
877211f5 | 2384 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
2385 | int err; |
2386 | ||
2387 | snd_pcm_stream_lock_irq(substream); | |
2388 | switch (runtime->status->state) { | |
2389 | case SNDRV_PCM_STATE_DRAINING: | |
2390 | if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) | |
2391 | goto __badfd; | |
2392 | case SNDRV_PCM_STATE_RUNNING: | |
2393 | if ((err = snd_pcm_update_hw_ptr(substream)) < 0) | |
2394 | break; | |
2395 | /* Fall through */ | |
2396 | case SNDRV_PCM_STATE_PREPARED: | |
2397 | case SNDRV_PCM_STATE_SUSPENDED: | |
2398 | err = 0; | |
2399 | break; | |
2400 | case SNDRV_PCM_STATE_XRUN: | |
2401 | err = -EPIPE; | |
2402 | break; | |
2403 | default: | |
2404 | __badfd: | |
2405 | err = -EBADFD; | |
2406 | break; | |
2407 | } | |
2408 | snd_pcm_stream_unlock_irq(substream); | |
2409 | return err; | |
2410 | } | |
2411 | ||
877211f5 TI |
2412 | static int snd_pcm_delay(struct snd_pcm_substream *substream, |
2413 | snd_pcm_sframes_t __user *res) | |
1da177e4 | 2414 | { |
877211f5 | 2415 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
2416 | int err; |
2417 | snd_pcm_sframes_t n = 0; | |
2418 | ||
2419 | snd_pcm_stream_lock_irq(substream); | |
2420 | switch (runtime->status->state) { | |
2421 | case SNDRV_PCM_STATE_DRAINING: | |
2422 | if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) | |
2423 | goto __badfd; | |
2424 | case SNDRV_PCM_STATE_RUNNING: | |
2425 | if ((err = snd_pcm_update_hw_ptr(substream)) < 0) | |
2426 | break; | |
2427 | /* Fall through */ | |
2428 | case SNDRV_PCM_STATE_PREPARED: | |
2429 | case SNDRV_PCM_STATE_SUSPENDED: | |
2430 | err = 0; | |
2431 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) | |
2432 | n = snd_pcm_playback_hw_avail(runtime); | |
2433 | else | |
2434 | n = snd_pcm_capture_avail(runtime); | |
4bbe1ddf | 2435 | n += runtime->delay; |
1da177e4 LT |
2436 | break; |
2437 | case SNDRV_PCM_STATE_XRUN: | |
2438 | err = -EPIPE; | |
2439 | break; | |
2440 | default: | |
2441 | __badfd: | |
2442 | err = -EBADFD; | |
2443 | break; | |
2444 | } | |
2445 | snd_pcm_stream_unlock_irq(substream); | |
2446 | if (!err) | |
2447 | if (put_user(n, res)) | |
2448 | err = -EFAULT; | |
2449 | return err; | |
2450 | } | |
2451 | ||
877211f5 TI |
2452 | static int snd_pcm_sync_ptr(struct snd_pcm_substream *substream, |
2453 | struct snd_pcm_sync_ptr __user *_sync_ptr) | |
1da177e4 | 2454 | { |
877211f5 TI |
2455 | struct snd_pcm_runtime *runtime = substream->runtime; |
2456 | struct snd_pcm_sync_ptr sync_ptr; | |
2457 | volatile struct snd_pcm_mmap_status *status; | |
2458 | volatile struct snd_pcm_mmap_control *control; | |
1da177e4 LT |
2459 | int err; |
2460 | ||
2461 | memset(&sync_ptr, 0, sizeof(sync_ptr)); | |
2462 | if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags))) | |
2463 | return -EFAULT; | |
877211f5 | 2464 | if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct snd_pcm_mmap_control))) |
1da177e4 LT |
2465 | return -EFAULT; |
2466 | status = runtime->status; | |
2467 | control = runtime->control; | |
2468 | if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) { | |
2469 | err = snd_pcm_hwsync(substream); | |
2470 | if (err < 0) | |
2471 | return err; | |
2472 | } | |
2473 | snd_pcm_stream_lock_irq(substream); | |
2474 | if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL)) | |
2475 | control->appl_ptr = sync_ptr.c.control.appl_ptr; | |
2476 | else | |
2477 | sync_ptr.c.control.appl_ptr = control->appl_ptr; | |
2478 | if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN)) | |
2479 | control->avail_min = sync_ptr.c.control.avail_min; | |
2480 | else | |
2481 | sync_ptr.c.control.avail_min = control->avail_min; | |
2482 | sync_ptr.s.status.state = status->state; | |
2483 | sync_ptr.s.status.hw_ptr = status->hw_ptr; | |
2484 | sync_ptr.s.status.tstamp = status->tstamp; | |
2485 | sync_ptr.s.status.suspended_state = status->suspended_state; | |
2486 | snd_pcm_stream_unlock_irq(substream); | |
2487 | if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr))) | |
2488 | return -EFAULT; | |
2489 | return 0; | |
2490 | } | |
b751eef1 JK |
2491 | |
2492 | static int snd_pcm_tstamp(struct snd_pcm_substream *substream, int __user *_arg) | |
2493 | { | |
2494 | struct snd_pcm_runtime *runtime = substream->runtime; | |
2495 | int arg; | |
2496 | ||
2497 | if (get_user(arg, _arg)) | |
2498 | return -EFAULT; | |
2499 | if (arg < 0 || arg > SNDRV_PCM_TSTAMP_TYPE_LAST) | |
2500 | return -EINVAL; | |
2501 | runtime->tstamp_type = SNDRV_PCM_TSTAMP_TYPE_GETTIMEOFDAY; | |
2502 | if (arg == SNDRV_PCM_TSTAMP_TYPE_MONOTONIC) | |
2503 | runtime->tstamp_type = SNDRV_PCM_TSTAMP_TYPE_MONOTONIC; | |
2504 | return 0; | |
2505 | } | |
1da177e4 | 2506 | |
0df63e44 TI |
2507 | static int snd_pcm_common_ioctl1(struct file *file, |
2508 | struct snd_pcm_substream *substream, | |
1da177e4 LT |
2509 | unsigned int cmd, void __user *arg) |
2510 | { | |
1da177e4 LT |
2511 | switch (cmd) { |
2512 | case SNDRV_PCM_IOCTL_PVERSION: | |
2513 | return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0; | |
2514 | case SNDRV_PCM_IOCTL_INFO: | |
2515 | return snd_pcm_info_user(substream, arg); | |
28e9e473 JK |
2516 | case SNDRV_PCM_IOCTL_TSTAMP: /* just for compatibility */ |
2517 | return 0; | |
b751eef1 JK |
2518 | case SNDRV_PCM_IOCTL_TTSTAMP: |
2519 | return snd_pcm_tstamp(substream, arg); | |
1da177e4 LT |
2520 | case SNDRV_PCM_IOCTL_HW_REFINE: |
2521 | return snd_pcm_hw_refine_user(substream, arg); | |
2522 | case SNDRV_PCM_IOCTL_HW_PARAMS: | |
2523 | return snd_pcm_hw_params_user(substream, arg); | |
2524 | case SNDRV_PCM_IOCTL_HW_FREE: | |
2525 | return snd_pcm_hw_free(substream); | |
2526 | case SNDRV_PCM_IOCTL_SW_PARAMS: | |
2527 | return snd_pcm_sw_params_user(substream, arg); | |
2528 | case SNDRV_PCM_IOCTL_STATUS: | |
2529 | return snd_pcm_status_user(substream, arg); | |
2530 | case SNDRV_PCM_IOCTL_CHANNEL_INFO: | |
2531 | return snd_pcm_channel_info_user(substream, arg); | |
2532 | case SNDRV_PCM_IOCTL_PREPARE: | |
0df63e44 | 2533 | return snd_pcm_prepare(substream, file); |
1da177e4 LT |
2534 | case SNDRV_PCM_IOCTL_RESET: |
2535 | return snd_pcm_reset(substream); | |
2536 | case SNDRV_PCM_IOCTL_START: | |
2537 | return snd_pcm_action_lock_irq(&snd_pcm_action_start, substream, SNDRV_PCM_STATE_RUNNING); | |
2538 | case SNDRV_PCM_IOCTL_LINK: | |
2539 | return snd_pcm_link(substream, (int)(unsigned long) arg); | |
2540 | case SNDRV_PCM_IOCTL_UNLINK: | |
2541 | return snd_pcm_unlink(substream); | |
2542 | case SNDRV_PCM_IOCTL_RESUME: | |
2543 | return snd_pcm_resume(substream); | |
2544 | case SNDRV_PCM_IOCTL_XRUN: | |
2545 | return snd_pcm_xrun(substream); | |
2546 | case SNDRV_PCM_IOCTL_HWSYNC: | |
2547 | return snd_pcm_hwsync(substream); | |
2548 | case SNDRV_PCM_IOCTL_DELAY: | |
2549 | return snd_pcm_delay(substream, arg); | |
2550 | case SNDRV_PCM_IOCTL_SYNC_PTR: | |
2551 | return snd_pcm_sync_ptr(substream, arg); | |
59d48582 | 2552 | #ifdef CONFIG_SND_SUPPORT_OLD_API |
1da177e4 LT |
2553 | case SNDRV_PCM_IOCTL_HW_REFINE_OLD: |
2554 | return snd_pcm_hw_refine_old_user(substream, arg); | |
2555 | case SNDRV_PCM_IOCTL_HW_PARAMS_OLD: | |
2556 | return snd_pcm_hw_params_old_user(substream, arg); | |
59d48582 | 2557 | #endif |
1da177e4 | 2558 | case SNDRV_PCM_IOCTL_DRAIN: |
4cdc115f | 2559 | return snd_pcm_drain(substream, file); |
1da177e4 LT |
2560 | case SNDRV_PCM_IOCTL_DROP: |
2561 | return snd_pcm_drop(substream); | |
e661d0dd TI |
2562 | case SNDRV_PCM_IOCTL_PAUSE: |
2563 | { | |
2564 | int res; | |
2565 | snd_pcm_stream_lock_irq(substream); | |
2566 | res = snd_pcm_pause(substream, (int)(unsigned long)arg); | |
2567 | snd_pcm_stream_unlock_irq(substream); | |
2568 | return res; | |
2569 | } | |
1da177e4 LT |
2570 | } |
2571 | snd_printd("unknown ioctl = 0x%x\n", cmd); | |
2572 | return -ENOTTY; | |
2573 | } | |
2574 | ||
0df63e44 TI |
2575 | static int snd_pcm_playback_ioctl1(struct file *file, |
2576 | struct snd_pcm_substream *substream, | |
1da177e4 LT |
2577 | unsigned int cmd, void __user *arg) |
2578 | { | |
7eaa943c TI |
2579 | if (snd_BUG_ON(!substream)) |
2580 | return -ENXIO; | |
2581 | if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_PLAYBACK)) | |
2582 | return -EINVAL; | |
1da177e4 LT |
2583 | switch (cmd) { |
2584 | case SNDRV_PCM_IOCTL_WRITEI_FRAMES: | |
2585 | { | |
877211f5 TI |
2586 | struct snd_xferi xferi; |
2587 | struct snd_xferi __user *_xferi = arg; | |
2588 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1da177e4 LT |
2589 | snd_pcm_sframes_t result; |
2590 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) | |
2591 | return -EBADFD; | |
2592 | if (put_user(0, &_xferi->result)) | |
2593 | return -EFAULT; | |
2594 | if (copy_from_user(&xferi, _xferi, sizeof(xferi))) | |
2595 | return -EFAULT; | |
2596 | result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames); | |
2597 | __put_user(result, &_xferi->result); | |
2598 | return result < 0 ? result : 0; | |
2599 | } | |
2600 | case SNDRV_PCM_IOCTL_WRITEN_FRAMES: | |
2601 | { | |
877211f5 TI |
2602 | struct snd_xfern xfern; |
2603 | struct snd_xfern __user *_xfern = arg; | |
2604 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1da177e4 LT |
2605 | void __user **bufs; |
2606 | snd_pcm_sframes_t result; | |
2607 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) | |
2608 | return -EBADFD; | |
2609 | if (runtime->channels > 128) | |
2610 | return -EINVAL; | |
2611 | if (put_user(0, &_xfern->result)) | |
2612 | return -EFAULT; | |
2613 | if (copy_from_user(&xfern, _xfern, sizeof(xfern))) | |
2614 | return -EFAULT; | |
ef44a1ec LZ |
2615 | |
2616 | bufs = memdup_user(xfern.bufs, | |
2617 | sizeof(void *) * runtime->channels); | |
2618 | if (IS_ERR(bufs)) | |
2619 | return PTR_ERR(bufs); | |
1da177e4 LT |
2620 | result = snd_pcm_lib_writev(substream, bufs, xfern.frames); |
2621 | kfree(bufs); | |
2622 | __put_user(result, &_xfern->result); | |
2623 | return result < 0 ? result : 0; | |
2624 | } | |
2625 | case SNDRV_PCM_IOCTL_REWIND: | |
2626 | { | |
2627 | snd_pcm_uframes_t frames; | |
2628 | snd_pcm_uframes_t __user *_frames = arg; | |
2629 | snd_pcm_sframes_t result; | |
2630 | if (get_user(frames, _frames)) | |
2631 | return -EFAULT; | |
2632 | if (put_user(0, _frames)) | |
2633 | return -EFAULT; | |
2634 | result = snd_pcm_playback_rewind(substream, frames); | |
2635 | __put_user(result, _frames); | |
2636 | return result < 0 ? result : 0; | |
2637 | } | |
2638 | case SNDRV_PCM_IOCTL_FORWARD: | |
2639 | { | |
2640 | snd_pcm_uframes_t frames; | |
2641 | snd_pcm_uframes_t __user *_frames = arg; | |
2642 | snd_pcm_sframes_t result; | |
2643 | if (get_user(frames, _frames)) | |
2644 | return -EFAULT; | |
2645 | if (put_user(0, _frames)) | |
2646 | return -EFAULT; | |
2647 | result = snd_pcm_playback_forward(substream, frames); | |
2648 | __put_user(result, _frames); | |
2649 | return result < 0 ? result : 0; | |
2650 | } | |
1da177e4 | 2651 | } |
0df63e44 | 2652 | return snd_pcm_common_ioctl1(file, substream, cmd, arg); |
1da177e4 LT |
2653 | } |
2654 | ||
0df63e44 TI |
2655 | static int snd_pcm_capture_ioctl1(struct file *file, |
2656 | struct snd_pcm_substream *substream, | |
1da177e4 LT |
2657 | unsigned int cmd, void __user *arg) |
2658 | { | |
7eaa943c TI |
2659 | if (snd_BUG_ON(!substream)) |
2660 | return -ENXIO; | |
2661 | if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_CAPTURE)) | |
2662 | return -EINVAL; | |
1da177e4 LT |
2663 | switch (cmd) { |
2664 | case SNDRV_PCM_IOCTL_READI_FRAMES: | |
2665 | { | |
877211f5 TI |
2666 | struct snd_xferi xferi; |
2667 | struct snd_xferi __user *_xferi = arg; | |
2668 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1da177e4 LT |
2669 | snd_pcm_sframes_t result; |
2670 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) | |
2671 | return -EBADFD; | |
2672 | if (put_user(0, &_xferi->result)) | |
2673 | return -EFAULT; | |
2674 | if (copy_from_user(&xferi, _xferi, sizeof(xferi))) | |
2675 | return -EFAULT; | |
2676 | result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames); | |
2677 | __put_user(result, &_xferi->result); | |
2678 | return result < 0 ? result : 0; | |
2679 | } | |
2680 | case SNDRV_PCM_IOCTL_READN_FRAMES: | |
2681 | { | |
877211f5 TI |
2682 | struct snd_xfern xfern; |
2683 | struct snd_xfern __user *_xfern = arg; | |
2684 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1da177e4 LT |
2685 | void *bufs; |
2686 | snd_pcm_sframes_t result; | |
2687 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) | |
2688 | return -EBADFD; | |
2689 | if (runtime->channels > 128) | |
2690 | return -EINVAL; | |
2691 | if (put_user(0, &_xfern->result)) | |
2692 | return -EFAULT; | |
2693 | if (copy_from_user(&xfern, _xfern, sizeof(xfern))) | |
2694 | return -EFAULT; | |
ef44a1ec LZ |
2695 | |
2696 | bufs = memdup_user(xfern.bufs, | |
2697 | sizeof(void *) * runtime->channels); | |
2698 | if (IS_ERR(bufs)) | |
2699 | return PTR_ERR(bufs); | |
1da177e4 LT |
2700 | result = snd_pcm_lib_readv(substream, bufs, xfern.frames); |
2701 | kfree(bufs); | |
2702 | __put_user(result, &_xfern->result); | |
2703 | return result < 0 ? result : 0; | |
2704 | } | |
2705 | case SNDRV_PCM_IOCTL_REWIND: | |
2706 | { | |
2707 | snd_pcm_uframes_t frames; | |
2708 | snd_pcm_uframes_t __user *_frames = arg; | |
2709 | snd_pcm_sframes_t result; | |
2710 | if (get_user(frames, _frames)) | |
2711 | return -EFAULT; | |
2712 | if (put_user(0, _frames)) | |
2713 | return -EFAULT; | |
2714 | result = snd_pcm_capture_rewind(substream, frames); | |
2715 | __put_user(result, _frames); | |
2716 | return result < 0 ? result : 0; | |
2717 | } | |
2718 | case SNDRV_PCM_IOCTL_FORWARD: | |
2719 | { | |
2720 | snd_pcm_uframes_t frames; | |
2721 | snd_pcm_uframes_t __user *_frames = arg; | |
2722 | snd_pcm_sframes_t result; | |
2723 | if (get_user(frames, _frames)) | |
2724 | return -EFAULT; | |
2725 | if (put_user(0, _frames)) | |
2726 | return -EFAULT; | |
2727 | result = snd_pcm_capture_forward(substream, frames); | |
2728 | __put_user(result, _frames); | |
2729 | return result < 0 ? result : 0; | |
2730 | } | |
2731 | } | |
0df63e44 | 2732 | return snd_pcm_common_ioctl1(file, substream, cmd, arg); |
1da177e4 LT |
2733 | } |
2734 | ||
877211f5 TI |
2735 | static long snd_pcm_playback_ioctl(struct file *file, unsigned int cmd, |
2736 | unsigned long arg) | |
1da177e4 | 2737 | { |
877211f5 | 2738 | struct snd_pcm_file *pcm_file; |
1da177e4 LT |
2739 | |
2740 | pcm_file = file->private_data; | |
2741 | ||
2742 | if (((cmd >> 8) & 0xff) != 'A') | |
2743 | return -ENOTTY; | |
2744 | ||
0df63e44 TI |
2745 | return snd_pcm_playback_ioctl1(file, pcm_file->substream, cmd, |
2746 | (void __user *)arg); | |
1da177e4 LT |
2747 | } |
2748 | ||
877211f5 TI |
2749 | static long snd_pcm_capture_ioctl(struct file *file, unsigned int cmd, |
2750 | unsigned long arg) | |
1da177e4 | 2751 | { |
877211f5 | 2752 | struct snd_pcm_file *pcm_file; |
1da177e4 LT |
2753 | |
2754 | pcm_file = file->private_data; | |
2755 | ||
2756 | if (((cmd >> 8) & 0xff) != 'A') | |
2757 | return -ENOTTY; | |
2758 | ||
0df63e44 TI |
2759 | return snd_pcm_capture_ioctl1(file, pcm_file->substream, cmd, |
2760 | (void __user *)arg); | |
1da177e4 LT |
2761 | } |
2762 | ||
bf1bbb5a TI |
2763 | int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream, |
2764 | unsigned int cmd, void *arg) | |
1da177e4 LT |
2765 | { |
2766 | mm_segment_t fs; | |
2767 | int result; | |
2768 | ||
2769 | fs = snd_enter_user(); | |
1da177e4 LT |
2770 | switch (substream->stream) { |
2771 | case SNDRV_PCM_STREAM_PLAYBACK: | |
0df63e44 TI |
2772 | result = snd_pcm_playback_ioctl1(NULL, substream, cmd, |
2773 | (void __user *)arg); | |
bf1bbb5a | 2774 | break; |
1da177e4 | 2775 | case SNDRV_PCM_STREAM_CAPTURE: |
0df63e44 TI |
2776 | result = snd_pcm_capture_ioctl1(NULL, substream, cmd, |
2777 | (void __user *)arg); | |
bf1bbb5a | 2778 | break; |
1da177e4 | 2779 | default: |
bf1bbb5a TI |
2780 | result = -EINVAL; |
2781 | break; | |
1da177e4 | 2782 | } |
bf1bbb5a TI |
2783 | snd_leave_user(fs); |
2784 | return result; | |
1da177e4 LT |
2785 | } |
2786 | ||
e88e8ae6 TI |
2787 | EXPORT_SYMBOL(snd_pcm_kernel_ioctl); |
2788 | ||
877211f5 TI |
2789 | static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count, |
2790 | loff_t * offset) | |
1da177e4 | 2791 | { |
877211f5 TI |
2792 | struct snd_pcm_file *pcm_file; |
2793 | struct snd_pcm_substream *substream; | |
2794 | struct snd_pcm_runtime *runtime; | |
1da177e4 LT |
2795 | snd_pcm_sframes_t result; |
2796 | ||
2797 | pcm_file = file->private_data; | |
2798 | substream = pcm_file->substream; | |
7eaa943c TI |
2799 | if (PCM_RUNTIME_CHECK(substream)) |
2800 | return -ENXIO; | |
1da177e4 LT |
2801 | runtime = substream->runtime; |
2802 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) | |
2803 | return -EBADFD; | |
2804 | if (!frame_aligned(runtime, count)) | |
2805 | return -EINVAL; | |
2806 | count = bytes_to_frames(runtime, count); | |
2807 | result = snd_pcm_lib_read(substream, buf, count); | |
2808 | if (result > 0) | |
2809 | result = frames_to_bytes(runtime, result); | |
2810 | return result; | |
2811 | } | |
2812 | ||
877211f5 TI |
2813 | static ssize_t snd_pcm_write(struct file *file, const char __user *buf, |
2814 | size_t count, loff_t * offset) | |
1da177e4 | 2815 | { |
877211f5 TI |
2816 | struct snd_pcm_file *pcm_file; |
2817 | struct snd_pcm_substream *substream; | |
2818 | struct snd_pcm_runtime *runtime; | |
1da177e4 LT |
2819 | snd_pcm_sframes_t result; |
2820 | ||
2821 | pcm_file = file->private_data; | |
2822 | substream = pcm_file->substream; | |
7eaa943c TI |
2823 | if (PCM_RUNTIME_CHECK(substream)) |
2824 | return -ENXIO; | |
1da177e4 | 2825 | runtime = substream->runtime; |
7eaa943c TI |
2826 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) |
2827 | return -EBADFD; | |
2828 | if (!frame_aligned(runtime, count)) | |
2829 | return -EINVAL; | |
1da177e4 LT |
2830 | count = bytes_to_frames(runtime, count); |
2831 | result = snd_pcm_lib_write(substream, buf, count); | |
2832 | if (result > 0) | |
2833 | result = frames_to_bytes(runtime, result); | |
1da177e4 LT |
2834 | return result; |
2835 | } | |
2836 | ||
ee0b3e67 BP |
2837 | static ssize_t snd_pcm_aio_read(struct kiocb *iocb, const struct iovec *iov, |
2838 | unsigned long nr_segs, loff_t pos) | |
1da177e4 LT |
2839 | |
2840 | { | |
877211f5 TI |
2841 | struct snd_pcm_file *pcm_file; |
2842 | struct snd_pcm_substream *substream; | |
2843 | struct snd_pcm_runtime *runtime; | |
1da177e4 LT |
2844 | snd_pcm_sframes_t result; |
2845 | unsigned long i; | |
2846 | void __user **bufs; | |
2847 | snd_pcm_uframes_t frames; | |
2848 | ||
ee0b3e67 | 2849 | pcm_file = iocb->ki_filp->private_data; |
1da177e4 | 2850 | substream = pcm_file->substream; |
7eaa943c TI |
2851 | if (PCM_RUNTIME_CHECK(substream)) |
2852 | return -ENXIO; | |
1da177e4 LT |
2853 | runtime = substream->runtime; |
2854 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) | |
2855 | return -EBADFD; | |
ee0b3e67 | 2856 | if (nr_segs > 1024 || nr_segs != runtime->channels) |
1da177e4 | 2857 | return -EINVAL; |
ee0b3e67 | 2858 | if (!frame_aligned(runtime, iov->iov_len)) |
1da177e4 | 2859 | return -EINVAL; |
ee0b3e67 BP |
2860 | frames = bytes_to_samples(runtime, iov->iov_len); |
2861 | bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL); | |
1da177e4 LT |
2862 | if (bufs == NULL) |
2863 | return -ENOMEM; | |
ee0b3e67 BP |
2864 | for (i = 0; i < nr_segs; ++i) |
2865 | bufs[i] = iov[i].iov_base; | |
1da177e4 LT |
2866 | result = snd_pcm_lib_readv(substream, bufs, frames); |
2867 | if (result > 0) | |
2868 | result = frames_to_bytes(runtime, result); | |
2869 | kfree(bufs); | |
2870 | return result; | |
2871 | } | |
2872 | ||
ee0b3e67 BP |
2873 | static ssize_t snd_pcm_aio_write(struct kiocb *iocb, const struct iovec *iov, |
2874 | unsigned long nr_segs, loff_t pos) | |
1da177e4 | 2875 | { |
877211f5 TI |
2876 | struct snd_pcm_file *pcm_file; |
2877 | struct snd_pcm_substream *substream; | |
2878 | struct snd_pcm_runtime *runtime; | |
1da177e4 LT |
2879 | snd_pcm_sframes_t result; |
2880 | unsigned long i; | |
2881 | void __user **bufs; | |
2882 | snd_pcm_uframes_t frames; | |
2883 | ||
ee0b3e67 | 2884 | pcm_file = iocb->ki_filp->private_data; |
1da177e4 | 2885 | substream = pcm_file->substream; |
7eaa943c TI |
2886 | if (PCM_RUNTIME_CHECK(substream)) |
2887 | return -ENXIO; | |
1da177e4 | 2888 | runtime = substream->runtime; |
7eaa943c TI |
2889 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) |
2890 | return -EBADFD; | |
ee0b3e67 | 2891 | if (nr_segs > 128 || nr_segs != runtime->channels || |
7eaa943c TI |
2892 | !frame_aligned(runtime, iov->iov_len)) |
2893 | return -EINVAL; | |
ee0b3e67 BP |
2894 | frames = bytes_to_samples(runtime, iov->iov_len); |
2895 | bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL); | |
1da177e4 LT |
2896 | if (bufs == NULL) |
2897 | return -ENOMEM; | |
ee0b3e67 BP |
2898 | for (i = 0; i < nr_segs; ++i) |
2899 | bufs[i] = iov[i].iov_base; | |
1da177e4 LT |
2900 | result = snd_pcm_lib_writev(substream, bufs, frames); |
2901 | if (result > 0) | |
2902 | result = frames_to_bytes(runtime, result); | |
2903 | kfree(bufs); | |
1da177e4 LT |
2904 | return result; |
2905 | } | |
2906 | ||
2907 | static unsigned int snd_pcm_playback_poll(struct file *file, poll_table * wait) | |
2908 | { | |
877211f5 TI |
2909 | struct snd_pcm_file *pcm_file; |
2910 | struct snd_pcm_substream *substream; | |
2911 | struct snd_pcm_runtime *runtime; | |
1da177e4 LT |
2912 | unsigned int mask; |
2913 | snd_pcm_uframes_t avail; | |
2914 | ||
2915 | pcm_file = file->private_data; | |
2916 | ||
2917 | substream = pcm_file->substream; | |
7eaa943c TI |
2918 | if (PCM_RUNTIME_CHECK(substream)) |
2919 | return -ENXIO; | |
1da177e4 LT |
2920 | runtime = substream->runtime; |
2921 | ||
2922 | poll_wait(file, &runtime->sleep, wait); | |
2923 | ||
2924 | snd_pcm_stream_lock_irq(substream); | |
2925 | avail = snd_pcm_playback_avail(runtime); | |
2926 | switch (runtime->status->state) { | |
2927 | case SNDRV_PCM_STATE_RUNNING: | |
2928 | case SNDRV_PCM_STATE_PREPARED: | |
2929 | case SNDRV_PCM_STATE_PAUSED: | |
2930 | if (avail >= runtime->control->avail_min) { | |
2931 | mask = POLLOUT | POLLWRNORM; | |
2932 | break; | |
2933 | } | |
2934 | /* Fall through */ | |
2935 | case SNDRV_PCM_STATE_DRAINING: | |
2936 | mask = 0; | |
2937 | break; | |
2938 | default: | |
2939 | mask = POLLOUT | POLLWRNORM | POLLERR; | |
2940 | break; | |
2941 | } | |
2942 | snd_pcm_stream_unlock_irq(substream); | |
2943 | return mask; | |
2944 | } | |
2945 | ||
2946 | static unsigned int snd_pcm_capture_poll(struct file *file, poll_table * wait) | |
2947 | { | |
877211f5 TI |
2948 | struct snd_pcm_file *pcm_file; |
2949 | struct snd_pcm_substream *substream; | |
2950 | struct snd_pcm_runtime *runtime; | |
1da177e4 LT |
2951 | unsigned int mask; |
2952 | snd_pcm_uframes_t avail; | |
2953 | ||
2954 | pcm_file = file->private_data; | |
2955 | ||
2956 | substream = pcm_file->substream; | |
7eaa943c TI |
2957 | if (PCM_RUNTIME_CHECK(substream)) |
2958 | return -ENXIO; | |
1da177e4 LT |
2959 | runtime = substream->runtime; |
2960 | ||
2961 | poll_wait(file, &runtime->sleep, wait); | |
2962 | ||
2963 | snd_pcm_stream_lock_irq(substream); | |
2964 | avail = snd_pcm_capture_avail(runtime); | |
2965 | switch (runtime->status->state) { | |
2966 | case SNDRV_PCM_STATE_RUNNING: | |
2967 | case SNDRV_PCM_STATE_PREPARED: | |
2968 | case SNDRV_PCM_STATE_PAUSED: | |
2969 | if (avail >= runtime->control->avail_min) { | |
2970 | mask = POLLIN | POLLRDNORM; | |
2971 | break; | |
2972 | } | |
2973 | mask = 0; | |
2974 | break; | |
2975 | case SNDRV_PCM_STATE_DRAINING: | |
2976 | if (avail > 0) { | |
2977 | mask = POLLIN | POLLRDNORM; | |
2978 | break; | |
2979 | } | |
2980 | /* Fall through */ | |
2981 | default: | |
2982 | mask = POLLIN | POLLRDNORM | POLLERR; | |
2983 | break; | |
2984 | } | |
2985 | snd_pcm_stream_unlock_irq(substream); | |
2986 | return mask; | |
2987 | } | |
2988 | ||
2989 | /* | |
2990 | * mmap support | |
2991 | */ | |
2992 | ||
2993 | /* | |
2994 | * Only on coherent architectures, we can mmap the status and the control records | |
2995 | * for effcient data transfer. On others, we have to use HWSYNC ioctl... | |
2996 | */ | |
2997 | #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA) | |
2998 | /* | |
2999 | * mmap status record | |
3000 | */ | |
3ad5afcd NP |
3001 | static int snd_pcm_mmap_status_fault(struct vm_area_struct *area, |
3002 | struct vm_fault *vmf) | |
1da177e4 | 3003 | { |
877211f5 TI |
3004 | struct snd_pcm_substream *substream = area->vm_private_data; |
3005 | struct snd_pcm_runtime *runtime; | |
1da177e4 LT |
3006 | |
3007 | if (substream == NULL) | |
3ad5afcd | 3008 | return VM_FAULT_SIGBUS; |
1da177e4 | 3009 | runtime = substream->runtime; |
3ad5afcd NP |
3010 | vmf->page = virt_to_page(runtime->status); |
3011 | get_page(vmf->page); | |
3012 | return 0; | |
1da177e4 LT |
3013 | } |
3014 | ||
f0f37e2f | 3015 | static const struct vm_operations_struct snd_pcm_vm_ops_status = |
1da177e4 | 3016 | { |
3ad5afcd | 3017 | .fault = snd_pcm_mmap_status_fault, |
1da177e4 LT |
3018 | }; |
3019 | ||
877211f5 | 3020 | static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file, |
1da177e4 LT |
3021 | struct vm_area_struct *area) |
3022 | { | |
1da177e4 LT |
3023 | long size; |
3024 | if (!(area->vm_flags & VM_READ)) | |
3025 | return -EINVAL; | |
1da177e4 | 3026 | size = area->vm_end - area->vm_start; |
877211f5 | 3027 | if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status))) |
1da177e4 LT |
3028 | return -EINVAL; |
3029 | area->vm_ops = &snd_pcm_vm_ops_status; | |
3030 | area->vm_private_data = substream; | |
3031 | area->vm_flags |= VM_RESERVED; | |
3032 | return 0; | |
3033 | } | |
3034 | ||
3035 | /* | |
3036 | * mmap control record | |
3037 | */ | |
3ad5afcd NP |
3038 | static int snd_pcm_mmap_control_fault(struct vm_area_struct *area, |
3039 | struct vm_fault *vmf) | |
1da177e4 | 3040 | { |
877211f5 TI |
3041 | struct snd_pcm_substream *substream = area->vm_private_data; |
3042 | struct snd_pcm_runtime *runtime; | |
1da177e4 LT |
3043 | |
3044 | if (substream == NULL) | |
3ad5afcd | 3045 | return VM_FAULT_SIGBUS; |
1da177e4 | 3046 | runtime = substream->runtime; |
3ad5afcd NP |
3047 | vmf->page = virt_to_page(runtime->control); |
3048 | get_page(vmf->page); | |
3049 | return 0; | |
1da177e4 LT |
3050 | } |
3051 | ||
f0f37e2f | 3052 | static const struct vm_operations_struct snd_pcm_vm_ops_control = |
1da177e4 | 3053 | { |
3ad5afcd | 3054 | .fault = snd_pcm_mmap_control_fault, |
1da177e4 LT |
3055 | }; |
3056 | ||
877211f5 | 3057 | static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file, |
1da177e4 LT |
3058 | struct vm_area_struct *area) |
3059 | { | |
1da177e4 LT |
3060 | long size; |
3061 | if (!(area->vm_flags & VM_READ)) | |
3062 | return -EINVAL; | |
1da177e4 | 3063 | size = area->vm_end - area->vm_start; |
877211f5 | 3064 | if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control))) |
1da177e4 LT |
3065 | return -EINVAL; |
3066 | area->vm_ops = &snd_pcm_vm_ops_control; | |
3067 | area->vm_private_data = substream; | |
3068 | area->vm_flags |= VM_RESERVED; | |
3069 | return 0; | |
3070 | } | |
3071 | #else /* ! coherent mmap */ | |
3072 | /* | |
3073 | * don't support mmap for status and control records. | |
3074 | */ | |
877211f5 | 3075 | static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file, |
1da177e4 LT |
3076 | struct vm_area_struct *area) |
3077 | { | |
3078 | return -ENXIO; | |
3079 | } | |
877211f5 | 3080 | static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file, |
1da177e4 LT |
3081 | struct vm_area_struct *area) |
3082 | { | |
3083 | return -ENXIO; | |
3084 | } | |
3085 | #endif /* coherent mmap */ | |
3086 | ||
9eb4a067 TI |
3087 | static inline struct page * |
3088 | snd_pcm_default_page_ops(struct snd_pcm_substream *substream, unsigned long ofs) | |
3089 | { | |
3090 | void *vaddr = substream->runtime->dma_area + ofs; | |
66b6cfac TI |
3091 | #if defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT) |
3092 | if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV) | |
3093 | return virt_to_page(CAC_ADDR(vaddr)); | |
6985c887 TI |
3094 | #endif |
3095 | #if defined(CONFIG_PPC32) && defined(CONFIG_NOT_COHERENT_CACHE) | |
3096 | if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV) { | |
3097 | dma_addr_t addr = substream->runtime->dma_addr + ofs; | |
3098 | addr -= get_dma_offset(substream->dma_buffer.dev.dev); | |
3099 | /* assume dma_handle set via pfn_to_phys() in | |
3100 | * mm/dma-noncoherent.c | |
3101 | */ | |
3102 | return pfn_to_page(addr >> PAGE_SHIFT); | |
3103 | } | |
66b6cfac | 3104 | #endif |
9eb4a067 TI |
3105 | return virt_to_page(vaddr); |
3106 | } | |
3107 | ||
1da177e4 | 3108 | /* |
3ad5afcd | 3109 | * fault callback for mmapping a RAM page |
1da177e4 | 3110 | */ |
3ad5afcd NP |
3111 | static int snd_pcm_mmap_data_fault(struct vm_area_struct *area, |
3112 | struct vm_fault *vmf) | |
1da177e4 | 3113 | { |
877211f5 TI |
3114 | struct snd_pcm_substream *substream = area->vm_private_data; |
3115 | struct snd_pcm_runtime *runtime; | |
1da177e4 LT |
3116 | unsigned long offset; |
3117 | struct page * page; | |
1da177e4 LT |
3118 | size_t dma_bytes; |
3119 | ||
3120 | if (substream == NULL) | |
3ad5afcd | 3121 | return VM_FAULT_SIGBUS; |
1da177e4 | 3122 | runtime = substream->runtime; |
3ad5afcd | 3123 | offset = vmf->pgoff << PAGE_SHIFT; |
1da177e4 LT |
3124 | dma_bytes = PAGE_ALIGN(runtime->dma_bytes); |
3125 | if (offset > dma_bytes - PAGE_SIZE) | |
3ad5afcd | 3126 | return VM_FAULT_SIGBUS; |
9eb4a067 | 3127 | if (substream->ops->page) |
1da177e4 | 3128 | page = substream->ops->page(substream, offset); |
9eb4a067 TI |
3129 | else |
3130 | page = snd_pcm_default_page_ops(substream, offset); | |
3131 | if (!page) | |
3132 | return VM_FAULT_SIGBUS; | |
b5810039 | 3133 | get_page(page); |
3ad5afcd NP |
3134 | vmf->page = page; |
3135 | return 0; | |
1da177e4 LT |
3136 | } |
3137 | ||
657b1989 TI |
3138 | static const struct vm_operations_struct snd_pcm_vm_ops_data = { |
3139 | .open = snd_pcm_mmap_data_open, | |
3140 | .close = snd_pcm_mmap_data_close, | |
3141 | }; | |
3142 | ||
3143 | static const struct vm_operations_struct snd_pcm_vm_ops_data_fault = { | |
1da177e4 LT |
3144 | .open = snd_pcm_mmap_data_open, |
3145 | .close = snd_pcm_mmap_data_close, | |
3ad5afcd | 3146 | .fault = snd_pcm_mmap_data_fault, |
1da177e4 LT |
3147 | }; |
3148 | ||
657b1989 TI |
3149 | #ifndef ARCH_HAS_DMA_MMAP_COHERENT |
3150 | /* This should be defined / handled globally! */ | |
3151 | #ifdef CONFIG_ARM | |
3152 | #define ARCH_HAS_DMA_MMAP_COHERENT | |
3153 | #endif | |
3154 | #endif | |
3155 | ||
1da177e4 LT |
3156 | /* |
3157 | * mmap the DMA buffer on RAM | |
3158 | */ | |
877211f5 TI |
3159 | static int snd_pcm_default_mmap(struct snd_pcm_substream *substream, |
3160 | struct vm_area_struct *area) | |
1da177e4 | 3161 | { |
1da177e4 | 3162 | area->vm_flags |= VM_RESERVED; |
657b1989 TI |
3163 | #ifdef ARCH_HAS_DMA_MMAP_COHERENT |
3164 | if (!substream->ops->page && | |
3165 | substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV) | |
3166 | return dma_mmap_coherent(substream->dma_buffer.dev.dev, | |
3167 | area, | |
3168 | substream->runtime->dma_area, | |
3169 | substream->runtime->dma_addr, | |
3170 | area->vm_end - area->vm_start); | |
9fe17b5d TI |
3171 | #elif defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT) |
3172 | if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV && | |
3173 | !plat_device_is_coherent(substream->dma_buffer.dev.dev)) | |
3174 | area->vm_page_prot = pgprot_noncached(area->vm_page_prot); | |
657b1989 TI |
3175 | #endif /* ARCH_HAS_DMA_MMAP_COHERENT */ |
3176 | /* mmap with fault handler */ | |
3177 | area->vm_ops = &snd_pcm_vm_ops_data_fault; | |
1da177e4 LT |
3178 | return 0; |
3179 | } | |
3180 | ||
3181 | /* | |
3182 | * mmap the DMA buffer on I/O memory area | |
3183 | */ | |
3184 | #if SNDRV_PCM_INFO_MMAP_IOMEM | |
877211f5 TI |
3185 | int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream, |
3186 | struct vm_area_struct *area) | |
1da177e4 LT |
3187 | { |
3188 | long size; | |
3189 | unsigned long offset; | |
3190 | ||
1da177e4 | 3191 | area->vm_page_prot = pgprot_noncached(area->vm_page_prot); |
1da177e4 LT |
3192 | area->vm_flags |= VM_IO; |
3193 | size = area->vm_end - area->vm_start; | |
3194 | offset = area->vm_pgoff << PAGE_SHIFT; | |
3195 | if (io_remap_pfn_range(area, area->vm_start, | |
3196 | (substream->runtime->dma_addr + offset) >> PAGE_SHIFT, | |
3197 | size, area->vm_page_prot)) | |
3198 | return -EAGAIN; | |
1da177e4 LT |
3199 | return 0; |
3200 | } | |
e88e8ae6 TI |
3201 | |
3202 | EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem); | |
1da177e4 LT |
3203 | #endif /* SNDRV_PCM_INFO_MMAP */ |
3204 | ||
3205 | /* | |
3206 | * mmap DMA buffer | |
3207 | */ | |
877211f5 | 3208 | int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file, |
1da177e4 LT |
3209 | struct vm_area_struct *area) |
3210 | { | |
877211f5 | 3211 | struct snd_pcm_runtime *runtime; |
1da177e4 LT |
3212 | long size; |
3213 | unsigned long offset; | |
3214 | size_t dma_bytes; | |
657b1989 | 3215 | int err; |
1da177e4 LT |
3216 | |
3217 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { | |
3218 | if (!(area->vm_flags & (VM_WRITE|VM_READ))) | |
3219 | return -EINVAL; | |
3220 | } else { | |
3221 | if (!(area->vm_flags & VM_READ)) | |
3222 | return -EINVAL; | |
3223 | } | |
3224 | runtime = substream->runtime; | |
1da177e4 LT |
3225 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) |
3226 | return -EBADFD; | |
3227 | if (!(runtime->info & SNDRV_PCM_INFO_MMAP)) | |
3228 | return -ENXIO; | |
3229 | if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED || | |
3230 | runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) | |
3231 | return -EINVAL; | |
3232 | size = area->vm_end - area->vm_start; | |
3233 | offset = area->vm_pgoff << PAGE_SHIFT; | |
3234 | dma_bytes = PAGE_ALIGN(runtime->dma_bytes); | |
3235 | if ((size_t)size > dma_bytes) | |
3236 | return -EINVAL; | |
3237 | if (offset > dma_bytes - size) | |
3238 | return -EINVAL; | |
3239 | ||
657b1989 TI |
3240 | area->vm_ops = &snd_pcm_vm_ops_data; |
3241 | area->vm_private_data = substream; | |
1da177e4 | 3242 | if (substream->ops->mmap) |
657b1989 | 3243 | err = substream->ops->mmap(substream, area); |
1da177e4 | 3244 | else |
657b1989 TI |
3245 | err = snd_pcm_default_mmap(substream, area); |
3246 | if (!err) | |
3247 | atomic_inc(&substream->mmap_count); | |
3248 | return err; | |
1da177e4 LT |
3249 | } |
3250 | ||
e88e8ae6 TI |
3251 | EXPORT_SYMBOL(snd_pcm_mmap_data); |
3252 | ||
1da177e4 LT |
3253 | static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area) |
3254 | { | |
877211f5 TI |
3255 | struct snd_pcm_file * pcm_file; |
3256 | struct snd_pcm_substream *substream; | |
1da177e4 LT |
3257 | unsigned long offset; |
3258 | ||
3259 | pcm_file = file->private_data; | |
3260 | substream = pcm_file->substream; | |
7eaa943c TI |
3261 | if (PCM_RUNTIME_CHECK(substream)) |
3262 | return -ENXIO; | |
1da177e4 LT |
3263 | |
3264 | offset = area->vm_pgoff << PAGE_SHIFT; | |
3265 | switch (offset) { | |
3266 | case SNDRV_PCM_MMAP_OFFSET_STATUS: | |
548a648b | 3267 | if (pcm_file->no_compat_mmap) |
1da177e4 LT |
3268 | return -ENXIO; |
3269 | return snd_pcm_mmap_status(substream, file, area); | |
3270 | case SNDRV_PCM_MMAP_OFFSET_CONTROL: | |
548a648b | 3271 | if (pcm_file->no_compat_mmap) |
1da177e4 LT |
3272 | return -ENXIO; |
3273 | return snd_pcm_mmap_control(substream, file, area); | |
3274 | default: | |
3275 | return snd_pcm_mmap_data(substream, file, area); | |
3276 | } | |
3277 | return 0; | |
3278 | } | |
3279 | ||
3280 | static int snd_pcm_fasync(int fd, struct file * file, int on) | |
3281 | { | |
877211f5 TI |
3282 | struct snd_pcm_file * pcm_file; |
3283 | struct snd_pcm_substream *substream; | |
3284 | struct snd_pcm_runtime *runtime; | |
1da177e4 LT |
3285 | |
3286 | pcm_file = file->private_data; | |
3287 | substream = pcm_file->substream; | |
7eaa943c | 3288 | if (PCM_RUNTIME_CHECK(substream)) |
d05468b7 | 3289 | return -ENXIO; |
1da177e4 | 3290 | runtime = substream->runtime; |
d05468b7 | 3291 | return fasync_helper(fd, file, on, &runtime->fasync); |
1da177e4 LT |
3292 | } |
3293 | ||
3294 | /* | |
3295 | * ioctl32 compat | |
3296 | */ | |
3297 | #ifdef CONFIG_COMPAT | |
3298 | #include "pcm_compat.c" | |
3299 | #else | |
3300 | #define snd_pcm_ioctl_compat NULL | |
3301 | #endif | |
3302 | ||
3303 | /* | |
3304 | * To be removed helpers to keep binary compatibility | |
3305 | */ | |
3306 | ||
59d48582 | 3307 | #ifdef CONFIG_SND_SUPPORT_OLD_API |
1da177e4 LT |
3308 | #define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5)) |
3309 | #define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5)) | |
3310 | ||
877211f5 TI |
3311 | static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params *params, |
3312 | struct snd_pcm_hw_params_old *oparams) | |
1da177e4 LT |
3313 | { |
3314 | unsigned int i; | |
3315 | ||
3316 | memset(params, 0, sizeof(*params)); | |
3317 | params->flags = oparams->flags; | |
3318 | for (i = 0; i < ARRAY_SIZE(oparams->masks); i++) | |
3319 | params->masks[i].bits[0] = oparams->masks[i]; | |
3320 | memcpy(params->intervals, oparams->intervals, sizeof(oparams->intervals)); | |
3321 | params->rmask = __OLD_TO_NEW_MASK(oparams->rmask); | |
3322 | params->cmask = __OLD_TO_NEW_MASK(oparams->cmask); | |
3323 | params->info = oparams->info; | |
3324 | params->msbits = oparams->msbits; | |
3325 | params->rate_num = oparams->rate_num; | |
3326 | params->rate_den = oparams->rate_den; | |
3327 | params->fifo_size = oparams->fifo_size; | |
3328 | } | |
3329 | ||
877211f5 TI |
3330 | static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old *oparams, |
3331 | struct snd_pcm_hw_params *params) | |
1da177e4 LT |
3332 | { |
3333 | unsigned int i; | |
3334 | ||
3335 | memset(oparams, 0, sizeof(*oparams)); | |
3336 | oparams->flags = params->flags; | |
3337 | for (i = 0; i < ARRAY_SIZE(oparams->masks); i++) | |
3338 | oparams->masks[i] = params->masks[i].bits[0]; | |
3339 | memcpy(oparams->intervals, params->intervals, sizeof(oparams->intervals)); | |
3340 | oparams->rmask = __NEW_TO_OLD_MASK(params->rmask); | |
3341 | oparams->cmask = __NEW_TO_OLD_MASK(params->cmask); | |
3342 | oparams->info = params->info; | |
3343 | oparams->msbits = params->msbits; | |
3344 | oparams->rate_num = params->rate_num; | |
3345 | oparams->rate_den = params->rate_den; | |
3346 | oparams->fifo_size = params->fifo_size; | |
3347 | } | |
3348 | ||
877211f5 TI |
3349 | static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream, |
3350 | struct snd_pcm_hw_params_old __user * _oparams) | |
1da177e4 | 3351 | { |
877211f5 TI |
3352 | struct snd_pcm_hw_params *params; |
3353 | struct snd_pcm_hw_params_old *oparams = NULL; | |
1da177e4 LT |
3354 | int err; |
3355 | ||
3356 | params = kmalloc(sizeof(*params), GFP_KERNEL); | |
ef44a1ec LZ |
3357 | if (!params) |
3358 | return -ENOMEM; | |
1da177e4 | 3359 | |
ef44a1ec LZ |
3360 | oparams = memdup_user(_oparams, sizeof(*oparams)); |
3361 | if (IS_ERR(oparams)) { | |
3362 | err = PTR_ERR(oparams); | |
1da177e4 LT |
3363 | goto out; |
3364 | } | |
3365 | snd_pcm_hw_convert_from_old_params(params, oparams); | |
3366 | err = snd_pcm_hw_refine(substream, params); | |
3367 | snd_pcm_hw_convert_to_old_params(oparams, params); | |
3368 | if (copy_to_user(_oparams, oparams, sizeof(*oparams))) { | |
3369 | if (!err) | |
3370 | err = -EFAULT; | |
3371 | } | |
ef44a1ec LZ |
3372 | |
3373 | kfree(oparams); | |
1da177e4 LT |
3374 | out: |
3375 | kfree(params); | |
1da177e4 LT |
3376 | return err; |
3377 | } | |
3378 | ||
877211f5 TI |
3379 | static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream, |
3380 | struct snd_pcm_hw_params_old __user * _oparams) | |
1da177e4 | 3381 | { |
877211f5 TI |
3382 | struct snd_pcm_hw_params *params; |
3383 | struct snd_pcm_hw_params_old *oparams = NULL; | |
1da177e4 LT |
3384 | int err; |
3385 | ||
3386 | params = kmalloc(sizeof(*params), GFP_KERNEL); | |
ef44a1ec LZ |
3387 | if (!params) |
3388 | return -ENOMEM; | |
3389 | ||
3390 | oparams = memdup_user(_oparams, sizeof(*oparams)); | |
3391 | if (IS_ERR(oparams)) { | |
3392 | err = PTR_ERR(oparams); | |
1da177e4 LT |
3393 | goto out; |
3394 | } | |
3395 | snd_pcm_hw_convert_from_old_params(params, oparams); | |
3396 | err = snd_pcm_hw_params(substream, params); | |
3397 | snd_pcm_hw_convert_to_old_params(oparams, params); | |
3398 | if (copy_to_user(_oparams, oparams, sizeof(*oparams))) { | |
3399 | if (!err) | |
3400 | err = -EFAULT; | |
3401 | } | |
ef44a1ec LZ |
3402 | |
3403 | kfree(oparams); | |
1da177e4 LT |
3404 | out: |
3405 | kfree(params); | |
1da177e4 LT |
3406 | return err; |
3407 | } | |
59d48582 | 3408 | #endif /* CONFIG_SND_SUPPORT_OLD_API */ |
1da177e4 | 3409 | |
7003609b | 3410 | #ifndef CONFIG_MMU |
55c63bd2 DG |
3411 | static unsigned long snd_pcm_get_unmapped_area(struct file *file, |
3412 | unsigned long addr, | |
3413 | unsigned long len, | |
3414 | unsigned long pgoff, | |
3415 | unsigned long flags) | |
3416 | { | |
3417 | struct snd_pcm_file *pcm_file = file->private_data; | |
3418 | struct snd_pcm_substream *substream = pcm_file->substream; | |
3419 | struct snd_pcm_runtime *runtime = substream->runtime; | |
3420 | unsigned long offset = pgoff << PAGE_SHIFT; | |
3421 | ||
3422 | switch (offset) { | |
3423 | case SNDRV_PCM_MMAP_OFFSET_STATUS: | |
3424 | return (unsigned long)runtime->status; | |
3425 | case SNDRV_PCM_MMAP_OFFSET_CONTROL: | |
3426 | return (unsigned long)runtime->control; | |
3427 | default: | |
3428 | return (unsigned long)runtime->dma_area + offset; | |
3429 | } | |
7003609b CC |
3430 | } |
3431 | #else | |
55c63bd2 | 3432 | # define snd_pcm_get_unmapped_area NULL |
7003609b CC |
3433 | #endif |
3434 | ||
1da177e4 LT |
3435 | /* |
3436 | * Register section | |
3437 | */ | |
3438 | ||
9c2e08c5 | 3439 | const struct file_operations snd_pcm_f_ops[2] = { |
1da177e4 | 3440 | { |
2af677fc CL |
3441 | .owner = THIS_MODULE, |
3442 | .write = snd_pcm_write, | |
ee0b3e67 | 3443 | .aio_write = snd_pcm_aio_write, |
f87135f5 | 3444 | .open = snd_pcm_playback_open, |
2af677fc | 3445 | .release = snd_pcm_release, |
02f4865f | 3446 | .llseek = no_llseek, |
2af677fc CL |
3447 | .poll = snd_pcm_playback_poll, |
3448 | .unlocked_ioctl = snd_pcm_playback_ioctl, | |
3449 | .compat_ioctl = snd_pcm_ioctl_compat, | |
3450 | .mmap = snd_pcm_mmap, | |
3451 | .fasync = snd_pcm_fasync, | |
55c63bd2 | 3452 | .get_unmapped_area = snd_pcm_get_unmapped_area, |
1da177e4 LT |
3453 | }, |
3454 | { | |
2af677fc CL |
3455 | .owner = THIS_MODULE, |
3456 | .read = snd_pcm_read, | |
ee0b3e67 | 3457 | .aio_read = snd_pcm_aio_read, |
f87135f5 | 3458 | .open = snd_pcm_capture_open, |
2af677fc | 3459 | .release = snd_pcm_release, |
02f4865f | 3460 | .llseek = no_llseek, |
2af677fc CL |
3461 | .poll = snd_pcm_capture_poll, |
3462 | .unlocked_ioctl = snd_pcm_capture_ioctl, | |
3463 | .compat_ioctl = snd_pcm_ioctl_compat, | |
3464 | .mmap = snd_pcm_mmap, | |
3465 | .fasync = snd_pcm_fasync, | |
55c63bd2 | 3466 | .get_unmapped_area = snd_pcm_get_unmapped_area, |
1da177e4 LT |
3467 | } |
3468 | }; |