Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * Digital Audio (PCM) abstract layer | |
3 | * Copyright (c) by Jaroslav Kysela <perex@suse.cz> | |
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 | ||
22 | #include <sound/driver.h> | |
23 | #include <linux/mm.h> | |
24 | #include <linux/smp_lock.h> | |
25 | #include <linux/file.h> | |
26 | #include <linux/slab.h> | |
27 | #include <linux/time.h> | |
28 | #include <linux/uio.h> | |
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> | |
37 | ||
38 | /* | |
39 | * Compatibility | |
40 | */ | |
41 | ||
42 | struct sndrv_pcm_hw_params_old { | |
43 | unsigned int flags; | |
44 | unsigned int masks[SNDRV_PCM_HW_PARAM_SUBFORMAT - | |
45 | SNDRV_PCM_HW_PARAM_ACCESS + 1]; | |
46 | struct sndrv_interval intervals[SNDRV_PCM_HW_PARAM_TICK_TIME - | |
47 | SNDRV_PCM_HW_PARAM_SAMPLE_BITS + 1]; | |
48 | unsigned int rmask; | |
49 | unsigned int cmask; | |
50 | unsigned int info; | |
51 | unsigned int msbits; | |
52 | unsigned int rate_num; | |
53 | unsigned int rate_den; | |
54 | sndrv_pcm_uframes_t fifo_size; | |
55 | unsigned char reserved[64]; | |
56 | }; | |
57 | ||
58 | #define SNDRV_PCM_IOCTL_HW_REFINE_OLD _IOWR('A', 0x10, struct sndrv_pcm_hw_params_old) | |
59 | #define SNDRV_PCM_IOCTL_HW_PARAMS_OLD _IOWR('A', 0x11, struct sndrv_pcm_hw_params_old) | |
60 | ||
61 | static int snd_pcm_hw_refine_old_user(snd_pcm_substream_t * substream, struct sndrv_pcm_hw_params_old __user * _oparams); | |
62 | static int snd_pcm_hw_params_old_user(snd_pcm_substream_t * substream, struct sndrv_pcm_hw_params_old __user * _oparams); | |
63 | ||
64 | /* | |
65 | * | |
66 | */ | |
67 | ||
68 | DEFINE_RWLOCK(snd_pcm_link_rwlock); | |
69 | static DECLARE_RWSEM(snd_pcm_link_rwsem); | |
70 | ||
71 | ||
72 | static inline mm_segment_t snd_enter_user(void) | |
73 | { | |
74 | mm_segment_t fs = get_fs(); | |
75 | set_fs(get_ds()); | |
76 | return fs; | |
77 | } | |
78 | ||
79 | static inline void snd_leave_user(mm_segment_t fs) | |
80 | { | |
81 | set_fs(fs); | |
82 | } | |
83 | ||
84 | ||
85 | ||
86 | int snd_pcm_info(snd_pcm_substream_t * substream, snd_pcm_info_t *info) | |
87 | { | |
88 | snd_pcm_runtime_t * runtime; | |
89 | snd_pcm_t *pcm = substream->pcm; | |
90 | snd_pcm_str_t *pstr = substream->pstr; | |
91 | ||
92 | snd_assert(substream != NULL, return -ENXIO); | |
93 | memset(info, 0, sizeof(*info)); | |
94 | info->card = pcm->card->number; | |
95 | info->device = pcm->device; | |
96 | info->stream = substream->stream; | |
97 | info->subdevice = substream->number; | |
98 | strlcpy(info->id, pcm->id, sizeof(info->id)); | |
99 | strlcpy(info->name, pcm->name, sizeof(info->name)); | |
100 | info->dev_class = pcm->dev_class; | |
101 | info->dev_subclass = pcm->dev_subclass; | |
102 | info->subdevices_count = pstr->substream_count; | |
103 | info->subdevices_avail = pstr->substream_count - pstr->substream_opened; | |
104 | strlcpy(info->subname, substream->name, sizeof(info->subname)); | |
105 | runtime = substream->runtime; | |
106 | /* AB: FIXME!!! This is definitely nonsense */ | |
107 | if (runtime) { | |
108 | info->sync = runtime->sync; | |
109 | substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_INFO, info); | |
110 | } | |
111 | return 0; | |
112 | } | |
113 | ||
114 | int snd_pcm_info_user(snd_pcm_substream_t * substream, snd_pcm_info_t __user * _info) | |
115 | { | |
116 | snd_pcm_info_t *info; | |
117 | int err; | |
118 | ||
119 | info = kmalloc(sizeof(*info), GFP_KERNEL); | |
120 | if (! info) | |
121 | return -ENOMEM; | |
122 | err = snd_pcm_info(substream, info); | |
123 | if (err >= 0) { | |
124 | if (copy_to_user(_info, info, sizeof(*info))) | |
125 | err = -EFAULT; | |
126 | } | |
127 | kfree(info); | |
128 | return err; | |
129 | } | |
130 | ||
131 | #undef RULES_DEBUG | |
132 | ||
133 | #ifdef RULES_DEBUG | |
134 | #define HW_PARAM(v) [SNDRV_PCM_HW_PARAM_##v] = #v | |
135 | char *snd_pcm_hw_param_names[] = { | |
136 | HW_PARAM(ACCESS), | |
137 | HW_PARAM(FORMAT), | |
138 | HW_PARAM(SUBFORMAT), | |
139 | HW_PARAM(SAMPLE_BITS), | |
140 | HW_PARAM(FRAME_BITS), | |
141 | HW_PARAM(CHANNELS), | |
142 | HW_PARAM(RATE), | |
143 | HW_PARAM(PERIOD_TIME), | |
144 | HW_PARAM(PERIOD_SIZE), | |
145 | HW_PARAM(PERIOD_BYTES), | |
146 | HW_PARAM(PERIODS), | |
147 | HW_PARAM(BUFFER_TIME), | |
148 | HW_PARAM(BUFFER_SIZE), | |
149 | HW_PARAM(BUFFER_BYTES), | |
150 | HW_PARAM(TICK_TIME), | |
151 | }; | |
152 | #endif | |
153 | ||
154 | int snd_pcm_hw_refine(snd_pcm_substream_t *substream, | |
155 | snd_pcm_hw_params_t *params) | |
156 | { | |
157 | unsigned int k; | |
158 | snd_pcm_hardware_t *hw; | |
159 | snd_interval_t *i = NULL; | |
160 | snd_mask_t *m = NULL; | |
161 | snd_pcm_hw_constraints_t *constrs = &substream->runtime->hw_constraints; | |
162 | unsigned int rstamps[constrs->rules_num]; | |
163 | unsigned int vstamps[SNDRV_PCM_HW_PARAM_LAST_INTERVAL + 1]; | |
164 | unsigned int stamp = 2; | |
165 | int changed, again; | |
166 | ||
167 | params->info = 0; | |
168 | params->fifo_size = 0; | |
169 | if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_SAMPLE_BITS)) | |
170 | params->msbits = 0; | |
171 | if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_RATE)) { | |
172 | params->rate_num = 0; | |
173 | params->rate_den = 0; | |
174 | } | |
175 | ||
176 | for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) { | |
177 | m = hw_param_mask(params, k); | |
178 | if (snd_mask_empty(m)) | |
179 | return -EINVAL; | |
180 | if (!(params->rmask & (1 << k))) | |
181 | continue; | |
182 | #ifdef RULES_DEBUG | |
183 | printk("%s = ", snd_pcm_hw_param_names[k]); | |
184 | printk("%04x%04x%04x%04x -> ", m->bits[3], m->bits[2], m->bits[1], m->bits[0]); | |
185 | #endif | |
186 | changed = snd_mask_refine(m, constrs_mask(constrs, k)); | |
187 | #ifdef RULES_DEBUG | |
188 | printk("%04x%04x%04x%04x\n", m->bits[3], m->bits[2], m->bits[1], m->bits[0]); | |
189 | #endif | |
190 | if (changed) | |
191 | params->cmask |= 1 << k; | |
192 | if (changed < 0) | |
193 | return changed; | |
194 | } | |
195 | ||
196 | for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) { | |
197 | i = hw_param_interval(params, k); | |
198 | if (snd_interval_empty(i)) | |
199 | return -EINVAL; | |
200 | if (!(params->rmask & (1 << k))) | |
201 | continue; | |
202 | #ifdef RULES_DEBUG | |
203 | printk("%s = ", snd_pcm_hw_param_names[k]); | |
204 | if (i->empty) | |
205 | printk("empty"); | |
206 | else | |
207 | printk("%c%u %u%c", | |
208 | i->openmin ? '(' : '[', i->min, | |
209 | i->max, i->openmax ? ')' : ']'); | |
210 | printk(" -> "); | |
211 | #endif | |
212 | changed = snd_interval_refine(i, constrs_interval(constrs, k)); | |
213 | #ifdef RULES_DEBUG | |
214 | if (i->empty) | |
215 | printk("empty\n"); | |
216 | else | |
217 | printk("%c%u %u%c\n", | |
218 | i->openmin ? '(' : '[', i->min, | |
219 | i->max, i->openmax ? ')' : ']'); | |
220 | #endif | |
221 | if (changed) | |
222 | params->cmask |= 1 << k; | |
223 | if (changed < 0) | |
224 | return changed; | |
225 | } | |
226 | ||
227 | for (k = 0; k < constrs->rules_num; k++) | |
228 | rstamps[k] = 0; | |
229 | for (k = 0; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) | |
230 | vstamps[k] = (params->rmask & (1 << k)) ? 1 : 0; | |
231 | do { | |
232 | again = 0; | |
233 | for (k = 0; k < constrs->rules_num; k++) { | |
234 | snd_pcm_hw_rule_t *r = &constrs->rules[k]; | |
235 | unsigned int d; | |
236 | int doit = 0; | |
237 | if (r->cond && !(r->cond & params->flags)) | |
238 | continue; | |
239 | for (d = 0; r->deps[d] >= 0; d++) { | |
240 | if (vstamps[r->deps[d]] > rstamps[k]) { | |
241 | doit = 1; | |
242 | break; | |
243 | } | |
244 | } | |
245 | if (!doit) | |
246 | continue; | |
247 | #ifdef RULES_DEBUG | |
248 | printk("Rule %d [%p]: ", k, r->func); | |
249 | if (r->var >= 0) { | |
250 | printk("%s = ", snd_pcm_hw_param_names[r->var]); | |
251 | if (hw_is_mask(r->var)) { | |
252 | m = hw_param_mask(params, r->var); | |
253 | printk("%x", *m->bits); | |
254 | } else { | |
255 | i = hw_param_interval(params, r->var); | |
256 | if (i->empty) | |
257 | printk("empty"); | |
258 | else | |
259 | printk("%c%u %u%c", | |
260 | i->openmin ? '(' : '[', i->min, | |
261 | i->max, i->openmax ? ')' : ']'); | |
262 | } | |
263 | } | |
264 | #endif | |
265 | changed = r->func(params, r); | |
266 | #ifdef RULES_DEBUG | |
267 | if (r->var >= 0) { | |
268 | printk(" -> "); | |
269 | if (hw_is_mask(r->var)) | |
270 | printk("%x", *m->bits); | |
271 | else { | |
272 | if (i->empty) | |
273 | printk("empty"); | |
274 | else | |
275 | printk("%c%u %u%c", | |
276 | i->openmin ? '(' : '[', i->min, | |
277 | i->max, i->openmax ? ')' : ']'); | |
278 | } | |
279 | } | |
280 | printk("\n"); | |
281 | #endif | |
282 | rstamps[k] = stamp; | |
283 | if (changed && r->var >= 0) { | |
284 | params->cmask |= (1 << r->var); | |
285 | vstamps[r->var] = stamp; | |
286 | again = 1; | |
287 | } | |
288 | if (changed < 0) | |
289 | return changed; | |
290 | stamp++; | |
291 | } | |
292 | } while (again); | |
293 | if (!params->msbits) { | |
294 | i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS); | |
295 | if (snd_interval_single(i)) | |
296 | params->msbits = snd_interval_value(i); | |
297 | } | |
298 | ||
299 | if (!params->rate_den) { | |
300 | i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE); | |
301 | if (snd_interval_single(i)) { | |
302 | params->rate_num = snd_interval_value(i); | |
303 | params->rate_den = 1; | |
304 | } | |
305 | } | |
306 | ||
307 | hw = &substream->runtime->hw; | |
308 | if (!params->info) | |
309 | params->info = hw->info; | |
310 | if (!params->fifo_size) | |
311 | params->fifo_size = hw->fifo_size; | |
312 | params->rmask = 0; | |
313 | return 0; | |
314 | } | |
315 | ||
316 | static int snd_pcm_hw_refine_user(snd_pcm_substream_t * substream, snd_pcm_hw_params_t __user * _params) | |
317 | { | |
318 | snd_pcm_hw_params_t *params; | |
319 | int err; | |
320 | ||
321 | params = kmalloc(sizeof(*params), GFP_KERNEL); | |
322 | if (!params) { | |
323 | err = -ENOMEM; | |
324 | goto out; | |
325 | } | |
326 | if (copy_from_user(params, _params, sizeof(*params))) { | |
327 | err = -EFAULT; | |
328 | goto out; | |
329 | } | |
330 | err = snd_pcm_hw_refine(substream, params); | |
331 | if (copy_to_user(_params, params, sizeof(*params))) { | |
332 | if (!err) | |
333 | err = -EFAULT; | |
334 | } | |
335 | out: | |
336 | kfree(params); | |
337 | return err; | |
338 | } | |
339 | ||
123992f7 AB |
340 | static int snd_pcm_hw_params(snd_pcm_substream_t *substream, |
341 | snd_pcm_hw_params_t *params) | |
1da177e4 LT |
342 | { |
343 | snd_pcm_runtime_t *runtime; | |
344 | int err; | |
345 | unsigned int bits; | |
346 | snd_pcm_uframes_t frames; | |
347 | ||
348 | snd_assert(substream != NULL, return -ENXIO); | |
349 | runtime = substream->runtime; | |
350 | snd_assert(runtime != NULL, return -ENXIO); | |
351 | snd_pcm_stream_lock_irq(substream); | |
352 | switch (runtime->status->state) { | |
353 | case SNDRV_PCM_STATE_OPEN: | |
354 | case SNDRV_PCM_STATE_SETUP: | |
355 | case SNDRV_PCM_STATE_PREPARED: | |
356 | break; | |
357 | default: | |
358 | snd_pcm_stream_unlock_irq(substream); | |
359 | return -EBADFD; | |
360 | } | |
361 | snd_pcm_stream_unlock_irq(substream); | |
362 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) | |
363 | if (!substream->oss.oss) | |
364 | #endif | |
365 | if (atomic_read(&runtime->mmap_count)) | |
366 | return -EBADFD; | |
367 | ||
368 | params->rmask = ~0U; | |
369 | err = snd_pcm_hw_refine(substream, params); | |
370 | if (err < 0) | |
371 | goto _error; | |
372 | ||
373 | err = snd_pcm_hw_params_choose(substream, params); | |
374 | if (err < 0) | |
375 | goto _error; | |
376 | ||
377 | if (substream->ops->hw_params != NULL) { | |
378 | err = substream->ops->hw_params(substream, params); | |
379 | if (err < 0) | |
380 | goto _error; | |
381 | } | |
382 | ||
383 | runtime->access = params_access(params); | |
384 | runtime->format = params_format(params); | |
385 | runtime->subformat = params_subformat(params); | |
386 | runtime->channels = params_channels(params); | |
387 | runtime->rate = params_rate(params); | |
388 | runtime->period_size = params_period_size(params); | |
389 | runtime->periods = params_periods(params); | |
390 | runtime->buffer_size = params_buffer_size(params); | |
391 | runtime->tick_time = params_tick_time(params); | |
392 | runtime->info = params->info; | |
393 | runtime->rate_num = params->rate_num; | |
394 | runtime->rate_den = params->rate_den; | |
395 | ||
396 | bits = snd_pcm_format_physical_width(runtime->format); | |
397 | runtime->sample_bits = bits; | |
398 | bits *= runtime->channels; | |
399 | runtime->frame_bits = bits; | |
400 | frames = 1; | |
401 | while (bits % 8 != 0) { | |
402 | bits *= 2; | |
403 | frames *= 2; | |
404 | } | |
405 | runtime->byte_align = bits / 8; | |
406 | runtime->min_align = frames; | |
407 | ||
408 | /* Default sw params */ | |
409 | runtime->tstamp_mode = SNDRV_PCM_TSTAMP_NONE; | |
410 | runtime->period_step = 1; | |
411 | runtime->sleep_min = 0; | |
412 | runtime->control->avail_min = runtime->period_size; | |
413 | runtime->xfer_align = runtime->period_size; | |
414 | runtime->start_threshold = 1; | |
415 | runtime->stop_threshold = runtime->buffer_size; | |
416 | runtime->silence_threshold = 0; | |
417 | runtime->silence_size = 0; | |
418 | runtime->boundary = runtime->buffer_size; | |
419 | while (runtime->boundary * 2 <= LONG_MAX - runtime->buffer_size) | |
420 | runtime->boundary *= 2; | |
421 | ||
422 | snd_pcm_timer_resolution_change(substream); | |
423 | runtime->status->state = SNDRV_PCM_STATE_SETUP; | |
424 | return 0; | |
425 | _error: | |
426 | /* hardware might be unuseable from this time, | |
427 | so we force application to retry to set | |
428 | the correct hardware parameter settings */ | |
429 | runtime->status->state = SNDRV_PCM_STATE_OPEN; | |
430 | if (substream->ops->hw_free != NULL) | |
431 | substream->ops->hw_free(substream); | |
432 | return err; | |
433 | } | |
434 | ||
435 | static int snd_pcm_hw_params_user(snd_pcm_substream_t * substream, snd_pcm_hw_params_t __user * _params) | |
436 | { | |
437 | snd_pcm_hw_params_t *params; | |
438 | int err; | |
439 | ||
440 | params = kmalloc(sizeof(*params), GFP_KERNEL); | |
441 | if (!params) { | |
442 | err = -ENOMEM; | |
443 | goto out; | |
444 | } | |
445 | if (copy_from_user(params, _params, sizeof(*params))) { | |
446 | err = -EFAULT; | |
447 | goto out; | |
448 | } | |
449 | err = snd_pcm_hw_params(substream, params); | |
450 | if (copy_to_user(_params, params, sizeof(*params))) { | |
451 | if (!err) | |
452 | err = -EFAULT; | |
453 | } | |
454 | out: | |
455 | kfree(params); | |
456 | return err; | |
457 | } | |
458 | ||
459 | static int snd_pcm_hw_free(snd_pcm_substream_t * substream) | |
460 | { | |
461 | snd_pcm_runtime_t *runtime; | |
462 | int result = 0; | |
463 | ||
464 | snd_assert(substream != NULL, return -ENXIO); | |
465 | runtime = substream->runtime; | |
466 | snd_assert(runtime != NULL, return -ENXIO); | |
467 | snd_pcm_stream_lock_irq(substream); | |
468 | switch (runtime->status->state) { | |
469 | case SNDRV_PCM_STATE_SETUP: | |
470 | case SNDRV_PCM_STATE_PREPARED: | |
471 | break; | |
472 | default: | |
473 | snd_pcm_stream_unlock_irq(substream); | |
474 | return -EBADFD; | |
475 | } | |
476 | snd_pcm_stream_unlock_irq(substream); | |
477 | if (atomic_read(&runtime->mmap_count)) | |
478 | return -EBADFD; | |
479 | if (substream->ops->hw_free) | |
480 | result = substream->ops->hw_free(substream); | |
481 | runtime->status->state = SNDRV_PCM_STATE_OPEN; | |
482 | return result; | |
483 | } | |
484 | ||
485 | static int snd_pcm_sw_params(snd_pcm_substream_t * substream, snd_pcm_sw_params_t *params) | |
486 | { | |
487 | snd_pcm_runtime_t *runtime; | |
488 | ||
489 | snd_assert(substream != NULL, return -ENXIO); | |
490 | runtime = substream->runtime; | |
491 | snd_assert(runtime != NULL, return -ENXIO); | |
492 | snd_pcm_stream_lock_irq(substream); | |
493 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { | |
494 | snd_pcm_stream_unlock_irq(substream); | |
495 | return -EBADFD; | |
496 | } | |
497 | snd_pcm_stream_unlock_irq(substream); | |
498 | ||
499 | if (params->tstamp_mode > SNDRV_PCM_TSTAMP_LAST) | |
500 | return -EINVAL; | |
501 | if (params->avail_min == 0) | |
502 | return -EINVAL; | |
503 | if (params->xfer_align == 0 || | |
504 | params->xfer_align % runtime->min_align != 0) | |
505 | return -EINVAL; | |
506 | if (params->silence_size >= runtime->boundary) { | |
507 | if (params->silence_threshold != 0) | |
508 | return -EINVAL; | |
509 | } else { | |
510 | if (params->silence_size > params->silence_threshold) | |
511 | return -EINVAL; | |
512 | if (params->silence_threshold > runtime->buffer_size) | |
513 | return -EINVAL; | |
514 | } | |
515 | snd_pcm_stream_lock_irq(substream); | |
516 | runtime->tstamp_mode = params->tstamp_mode; | |
517 | runtime->sleep_min = params->sleep_min; | |
518 | runtime->period_step = params->period_step; | |
519 | runtime->control->avail_min = params->avail_min; | |
520 | runtime->start_threshold = params->start_threshold; | |
521 | runtime->stop_threshold = params->stop_threshold; | |
522 | runtime->silence_threshold = params->silence_threshold; | |
523 | runtime->silence_size = params->silence_size; | |
524 | runtime->xfer_align = params->xfer_align; | |
525 | params->boundary = runtime->boundary; | |
526 | if (snd_pcm_running(substream)) { | |
527 | if (runtime->sleep_min) | |
528 | snd_pcm_tick_prepare(substream); | |
529 | else | |
530 | snd_pcm_tick_set(substream, 0); | |
531 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && | |
532 | runtime->silence_size > 0) | |
533 | snd_pcm_playback_silence(substream, ULONG_MAX); | |
534 | wake_up(&runtime->sleep); | |
535 | } | |
536 | snd_pcm_stream_unlock_irq(substream); | |
537 | return 0; | |
538 | } | |
539 | ||
540 | static int snd_pcm_sw_params_user(snd_pcm_substream_t * substream, snd_pcm_sw_params_t __user * _params) | |
541 | { | |
542 | snd_pcm_sw_params_t params; | |
543 | int err; | |
544 | if (copy_from_user(¶ms, _params, sizeof(params))) | |
545 | return -EFAULT; | |
546 | err = snd_pcm_sw_params(substream, ¶ms); | |
547 | if (copy_to_user(_params, ¶ms, sizeof(params))) | |
548 | return -EFAULT; | |
549 | return err; | |
550 | } | |
551 | ||
552 | int snd_pcm_status(snd_pcm_substream_t *substream, | |
553 | snd_pcm_status_t *status) | |
554 | { | |
555 | snd_pcm_runtime_t *runtime = substream->runtime; | |
556 | ||
557 | snd_pcm_stream_lock_irq(substream); | |
558 | status->state = runtime->status->state; | |
559 | status->suspended_state = runtime->status->suspended_state; | |
560 | if (status->state == SNDRV_PCM_STATE_OPEN) | |
561 | goto _end; | |
562 | status->trigger_tstamp = runtime->trigger_tstamp; | |
563 | if (snd_pcm_running(substream)) { | |
564 | snd_pcm_update_hw_ptr(substream); | |
565 | if (runtime->tstamp_mode & SNDRV_PCM_TSTAMP_MMAP) | |
566 | status->tstamp = runtime->status->tstamp; | |
567 | else | |
07799e75 | 568 | getnstimeofday(&status->tstamp); |
1da177e4 | 569 | } else |
07799e75 | 570 | getnstimeofday(&status->tstamp); |
1da177e4 LT |
571 | status->appl_ptr = runtime->control->appl_ptr; |
572 | status->hw_ptr = runtime->status->hw_ptr; | |
573 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { | |
574 | status->avail = snd_pcm_playback_avail(runtime); | |
575 | if (runtime->status->state == SNDRV_PCM_STATE_RUNNING || | |
576 | runtime->status->state == SNDRV_PCM_STATE_DRAINING) | |
577 | status->delay = runtime->buffer_size - status->avail; | |
578 | else | |
579 | status->delay = 0; | |
580 | } else { | |
581 | status->avail = snd_pcm_capture_avail(runtime); | |
582 | if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) | |
583 | status->delay = status->avail; | |
584 | else | |
585 | status->delay = 0; | |
586 | } | |
587 | status->avail_max = runtime->avail_max; | |
588 | status->overrange = runtime->overrange; | |
589 | runtime->avail_max = 0; | |
590 | runtime->overrange = 0; | |
591 | _end: | |
592 | snd_pcm_stream_unlock_irq(substream); | |
593 | return 0; | |
594 | } | |
595 | ||
596 | static int snd_pcm_status_user(snd_pcm_substream_t * substream, snd_pcm_status_t __user * _status) | |
597 | { | |
598 | snd_pcm_status_t status; | |
599 | snd_pcm_runtime_t *runtime; | |
600 | int res; | |
601 | ||
602 | snd_assert(substream != NULL, return -ENXIO); | |
603 | runtime = substream->runtime; | |
604 | memset(&status, 0, sizeof(status)); | |
605 | res = snd_pcm_status(substream, &status); | |
606 | if (res < 0) | |
607 | return res; | |
608 | if (copy_to_user(_status, &status, sizeof(status))) | |
609 | return -EFAULT; | |
610 | return 0; | |
611 | } | |
612 | ||
613 | static int snd_pcm_channel_info(snd_pcm_substream_t * substream, snd_pcm_channel_info_t * info) | |
614 | { | |
615 | snd_pcm_runtime_t *runtime; | |
616 | unsigned int channel; | |
617 | ||
618 | snd_assert(substream != NULL, return -ENXIO); | |
619 | channel = info->channel; | |
620 | runtime = substream->runtime; | |
621 | snd_pcm_stream_lock_irq(substream); | |
622 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { | |
623 | snd_pcm_stream_unlock_irq(substream); | |
624 | return -EBADFD; | |
625 | } | |
626 | snd_pcm_stream_unlock_irq(substream); | |
627 | if (channel >= runtime->channels) | |
628 | return -EINVAL; | |
629 | memset(info, 0, sizeof(*info)); | |
630 | info->channel = channel; | |
631 | return substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_CHANNEL_INFO, info); | |
632 | } | |
633 | ||
634 | static int snd_pcm_channel_info_user(snd_pcm_substream_t * substream, snd_pcm_channel_info_t __user * _info) | |
635 | { | |
636 | snd_pcm_channel_info_t info; | |
637 | int res; | |
638 | ||
639 | if (copy_from_user(&info, _info, sizeof(info))) | |
640 | return -EFAULT; | |
641 | res = snd_pcm_channel_info(substream, &info); | |
642 | if (res < 0) | |
643 | return res; | |
644 | if (copy_to_user(_info, &info, sizeof(info))) | |
645 | return -EFAULT; | |
646 | return 0; | |
647 | } | |
648 | ||
649 | static void snd_pcm_trigger_tstamp(snd_pcm_substream_t *substream) | |
650 | { | |
651 | snd_pcm_runtime_t *runtime = substream->runtime; | |
652 | if (runtime->trigger_master == NULL) | |
653 | return; | |
654 | if (runtime->trigger_master == substream) { | |
07799e75 | 655 | getnstimeofday(&runtime->trigger_tstamp); |
1da177e4 LT |
656 | } else { |
657 | snd_pcm_trigger_tstamp(runtime->trigger_master); | |
658 | runtime->trigger_tstamp = runtime->trigger_master->runtime->trigger_tstamp; | |
659 | } | |
660 | runtime->trigger_master = NULL; | |
661 | } | |
662 | ||
663 | struct action_ops { | |
664 | int (*pre_action)(snd_pcm_substream_t *substream, int state); | |
665 | int (*do_action)(snd_pcm_substream_t *substream, int state); | |
666 | void (*undo_action)(snd_pcm_substream_t *substream, int state); | |
667 | void (*post_action)(snd_pcm_substream_t *substream, int state); | |
668 | }; | |
669 | ||
670 | /* | |
671 | * this functions is core for handling of linked stream | |
672 | * Note: the stream state might be changed also on failure | |
673 | * Note2: call with calling stream lock + link lock | |
674 | */ | |
675 | static int snd_pcm_action_group(struct action_ops *ops, | |
676 | snd_pcm_substream_t *substream, | |
677 | int state, int do_lock) | |
678 | { | |
679 | struct list_head *pos; | |
680 | snd_pcm_substream_t *s = NULL; | |
681 | snd_pcm_substream_t *s1; | |
682 | int res = 0; | |
683 | ||
684 | snd_pcm_group_for_each(pos, substream) { | |
685 | s = snd_pcm_group_substream_entry(pos); | |
686 | if (do_lock && s != substream) | |
687 | spin_lock(&s->self_group.lock); | |
688 | res = ops->pre_action(s, state); | |
689 | if (res < 0) | |
690 | goto _unlock; | |
691 | } | |
692 | snd_pcm_group_for_each(pos, substream) { | |
693 | s = snd_pcm_group_substream_entry(pos); | |
694 | res = ops->do_action(s, state); | |
695 | if (res < 0) { | |
696 | if (ops->undo_action) { | |
697 | snd_pcm_group_for_each(pos, substream) { | |
698 | s1 = snd_pcm_group_substream_entry(pos); | |
699 | if (s1 == s) /* failed stream */ | |
700 | break; | |
701 | ops->undo_action(s1, state); | |
702 | } | |
703 | } | |
704 | s = NULL; /* unlock all */ | |
705 | goto _unlock; | |
706 | } | |
707 | } | |
708 | snd_pcm_group_for_each(pos, substream) { | |
709 | s = snd_pcm_group_substream_entry(pos); | |
710 | ops->post_action(s, state); | |
711 | } | |
712 | _unlock: | |
713 | if (do_lock) { | |
714 | /* unlock streams */ | |
715 | snd_pcm_group_for_each(pos, substream) { | |
716 | s1 = snd_pcm_group_substream_entry(pos); | |
717 | if (s1 != substream) | |
718 | spin_unlock(&s1->self_group.lock); | |
719 | if (s1 == s) /* end */ | |
720 | break; | |
721 | } | |
722 | } | |
723 | return res; | |
724 | } | |
725 | ||
726 | /* | |
727 | * Note: call with stream lock | |
728 | */ | |
729 | static int snd_pcm_action_single(struct action_ops *ops, | |
730 | snd_pcm_substream_t *substream, | |
731 | int state) | |
732 | { | |
733 | int res; | |
734 | ||
735 | res = ops->pre_action(substream, state); | |
736 | if (res < 0) | |
737 | return res; | |
738 | res = ops->do_action(substream, state); | |
739 | if (res == 0) | |
740 | ops->post_action(substream, state); | |
741 | else if (ops->undo_action) | |
742 | ops->undo_action(substream, state); | |
743 | return res; | |
744 | } | |
745 | ||
746 | /* | |
747 | * Note: call with stream lock | |
748 | */ | |
749 | static int snd_pcm_action(struct action_ops *ops, | |
750 | snd_pcm_substream_t *substream, | |
751 | int state) | |
752 | { | |
753 | int res; | |
754 | ||
755 | if (snd_pcm_stream_linked(substream)) { | |
756 | if (!spin_trylock(&substream->group->lock)) { | |
757 | spin_unlock(&substream->self_group.lock); | |
758 | spin_lock(&substream->group->lock); | |
759 | spin_lock(&substream->self_group.lock); | |
760 | } | |
761 | res = snd_pcm_action_group(ops, substream, state, 1); | |
762 | spin_unlock(&substream->group->lock); | |
763 | } else { | |
764 | res = snd_pcm_action_single(ops, substream, state); | |
765 | } | |
766 | return res; | |
767 | } | |
768 | ||
769 | /* | |
770 | * Note: don't use any locks before | |
771 | */ | |
772 | static int snd_pcm_action_lock_irq(struct action_ops *ops, | |
773 | snd_pcm_substream_t *substream, | |
774 | int state) | |
775 | { | |
776 | int res; | |
777 | ||
778 | read_lock_irq(&snd_pcm_link_rwlock); | |
779 | if (snd_pcm_stream_linked(substream)) { | |
780 | spin_lock(&substream->group->lock); | |
781 | spin_lock(&substream->self_group.lock); | |
782 | res = snd_pcm_action_group(ops, substream, state, 1); | |
783 | spin_unlock(&substream->self_group.lock); | |
784 | spin_unlock(&substream->group->lock); | |
785 | } else { | |
786 | spin_lock(&substream->self_group.lock); | |
787 | res = snd_pcm_action_single(ops, substream, state); | |
788 | spin_unlock(&substream->self_group.lock); | |
789 | } | |
790 | read_unlock_irq(&snd_pcm_link_rwlock); | |
791 | return res; | |
792 | } | |
793 | ||
794 | /* | |
795 | */ | |
796 | static int snd_pcm_action_nonatomic(struct action_ops *ops, | |
797 | snd_pcm_substream_t *substream, | |
798 | int state) | |
799 | { | |
800 | int res; | |
801 | ||
802 | down_read(&snd_pcm_link_rwsem); | |
803 | if (snd_pcm_stream_linked(substream)) | |
804 | res = snd_pcm_action_group(ops, substream, state, 0); | |
805 | else | |
806 | res = snd_pcm_action_single(ops, substream, state); | |
807 | up_read(&snd_pcm_link_rwsem); | |
808 | return res; | |
809 | } | |
810 | ||
811 | /* | |
812 | * start callbacks | |
813 | */ | |
814 | static int snd_pcm_pre_start(snd_pcm_substream_t *substream, int state) | |
815 | { | |
816 | snd_pcm_runtime_t *runtime = substream->runtime; | |
817 | if (runtime->status->state != SNDRV_PCM_STATE_PREPARED) | |
818 | return -EBADFD; | |
819 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && | |
820 | !snd_pcm_playback_data(substream)) | |
821 | return -EPIPE; | |
822 | runtime->trigger_master = substream; | |
823 | return 0; | |
824 | } | |
825 | ||
826 | static int snd_pcm_do_start(snd_pcm_substream_t *substream, int state) | |
827 | { | |
828 | if (substream->runtime->trigger_master != substream) | |
829 | return 0; | |
830 | return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_START); | |
831 | } | |
832 | ||
833 | static void snd_pcm_undo_start(snd_pcm_substream_t *substream, int state) | |
834 | { | |
835 | if (substream->runtime->trigger_master == substream) | |
836 | substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP); | |
837 | } | |
838 | ||
839 | static void snd_pcm_post_start(snd_pcm_substream_t *substream, int state) | |
840 | { | |
841 | snd_pcm_runtime_t *runtime = substream->runtime; | |
842 | snd_pcm_trigger_tstamp(substream); | |
843 | runtime->status->state = state; | |
844 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && | |
845 | runtime->silence_size > 0) | |
846 | snd_pcm_playback_silence(substream, ULONG_MAX); | |
847 | if (runtime->sleep_min) | |
848 | snd_pcm_tick_prepare(substream); | |
849 | if (substream->timer) | |
850 | snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTART, &runtime->trigger_tstamp); | |
851 | } | |
852 | ||
853 | static struct action_ops snd_pcm_action_start = { | |
854 | .pre_action = snd_pcm_pre_start, | |
855 | .do_action = snd_pcm_do_start, | |
856 | .undo_action = snd_pcm_undo_start, | |
857 | .post_action = snd_pcm_post_start | |
858 | }; | |
859 | ||
860 | /** | |
861 | * snd_pcm_start | |
df8db936 | 862 | * @substream: the PCM substream instance |
1da177e4 LT |
863 | * |
864 | * Start all linked streams. | |
865 | */ | |
866 | int snd_pcm_start(snd_pcm_substream_t *substream) | |
867 | { | |
868 | return snd_pcm_action(&snd_pcm_action_start, substream, SNDRV_PCM_STATE_RUNNING); | |
869 | } | |
870 | ||
871 | /* | |
872 | * stop callbacks | |
873 | */ | |
874 | static int snd_pcm_pre_stop(snd_pcm_substream_t *substream, int state) | |
875 | { | |
876 | snd_pcm_runtime_t *runtime = substream->runtime; | |
877 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) | |
878 | return -EBADFD; | |
879 | runtime->trigger_master = substream; | |
880 | return 0; | |
881 | } | |
882 | ||
883 | static int snd_pcm_do_stop(snd_pcm_substream_t *substream, int state) | |
884 | { | |
885 | if (substream->runtime->trigger_master == substream && | |
886 | snd_pcm_running(substream)) | |
887 | substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP); | |
888 | return 0; /* unconditonally stop all substreams */ | |
889 | } | |
890 | ||
891 | static void snd_pcm_post_stop(snd_pcm_substream_t *substream, int state) | |
892 | { | |
893 | snd_pcm_runtime_t *runtime = substream->runtime; | |
894 | if (runtime->status->state != state) { | |
895 | snd_pcm_trigger_tstamp(substream); | |
896 | if (substream->timer) | |
897 | snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTOP, &runtime->trigger_tstamp); | |
898 | runtime->status->state = state; | |
899 | snd_pcm_tick_set(substream, 0); | |
900 | } | |
901 | wake_up(&runtime->sleep); | |
902 | } | |
903 | ||
904 | static struct action_ops snd_pcm_action_stop = { | |
905 | .pre_action = snd_pcm_pre_stop, | |
906 | .do_action = snd_pcm_do_stop, | |
907 | .post_action = snd_pcm_post_stop | |
908 | }; | |
909 | ||
910 | /** | |
911 | * snd_pcm_stop | |
df8db936 TI |
912 | * @substream: the PCM substream instance |
913 | * @state: PCM state after stopping the stream | |
1da177e4 LT |
914 | * |
915 | * Try to stop all running streams in the substream group. | |
916 | * The state of each stream is changed to the given value after that unconditionally. | |
917 | */ | |
918 | int snd_pcm_stop(snd_pcm_substream_t *substream, int state) | |
919 | { | |
920 | return snd_pcm_action(&snd_pcm_action_stop, substream, state); | |
921 | } | |
922 | ||
923 | /** | |
924 | * snd_pcm_drain_done | |
df8db936 | 925 | * @substream: the PCM substream |
1da177e4 LT |
926 | * |
927 | * Stop the DMA only when the given stream is playback. | |
928 | * The state is changed to SETUP. | |
929 | * Unlike snd_pcm_stop(), this affects only the given stream. | |
930 | */ | |
931 | int snd_pcm_drain_done(snd_pcm_substream_t *substream) | |
932 | { | |
933 | return snd_pcm_action_single(&snd_pcm_action_stop, substream, SNDRV_PCM_STATE_SETUP); | |
934 | } | |
935 | ||
936 | /* | |
937 | * pause callbacks | |
938 | */ | |
939 | static int snd_pcm_pre_pause(snd_pcm_substream_t *substream, int push) | |
940 | { | |
941 | snd_pcm_runtime_t *runtime = substream->runtime; | |
942 | if (!(runtime->info & SNDRV_PCM_INFO_PAUSE)) | |
943 | return -ENOSYS; | |
944 | if (push) { | |
945 | if (runtime->status->state != SNDRV_PCM_STATE_RUNNING) | |
946 | return -EBADFD; | |
947 | } else if (runtime->status->state != SNDRV_PCM_STATE_PAUSED) | |
948 | return -EBADFD; | |
949 | runtime->trigger_master = substream; | |
950 | return 0; | |
951 | } | |
952 | ||
953 | static int snd_pcm_do_pause(snd_pcm_substream_t *substream, int push) | |
954 | { | |
955 | if (substream->runtime->trigger_master != substream) | |
956 | return 0; | |
957 | return substream->ops->trigger(substream, | |
958 | push ? SNDRV_PCM_TRIGGER_PAUSE_PUSH : | |
959 | SNDRV_PCM_TRIGGER_PAUSE_RELEASE); | |
960 | } | |
961 | ||
962 | static void snd_pcm_undo_pause(snd_pcm_substream_t *substream, int push) | |
963 | { | |
964 | if (substream->runtime->trigger_master == substream) | |
965 | substream->ops->trigger(substream, | |
966 | push ? SNDRV_PCM_TRIGGER_PAUSE_RELEASE : | |
967 | SNDRV_PCM_TRIGGER_PAUSE_PUSH); | |
968 | } | |
969 | ||
970 | static void snd_pcm_post_pause(snd_pcm_substream_t *substream, int push) | |
971 | { | |
972 | snd_pcm_runtime_t *runtime = substream->runtime; | |
973 | snd_pcm_trigger_tstamp(substream); | |
974 | if (push) { | |
975 | runtime->status->state = SNDRV_PCM_STATE_PAUSED; | |
976 | if (substream->timer) | |
977 | snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MPAUSE, &runtime->trigger_tstamp); | |
978 | snd_pcm_tick_set(substream, 0); | |
979 | wake_up(&runtime->sleep); | |
980 | } else { | |
981 | runtime->status->state = SNDRV_PCM_STATE_RUNNING; | |
982 | if (runtime->sleep_min) | |
983 | snd_pcm_tick_prepare(substream); | |
984 | if (substream->timer) | |
985 | snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MCONTINUE, &runtime->trigger_tstamp); | |
986 | } | |
987 | } | |
988 | ||
989 | static struct action_ops snd_pcm_action_pause = { | |
990 | .pre_action = snd_pcm_pre_pause, | |
991 | .do_action = snd_pcm_do_pause, | |
992 | .undo_action = snd_pcm_undo_pause, | |
993 | .post_action = snd_pcm_post_pause | |
994 | }; | |
995 | ||
996 | /* | |
997 | * Push/release the pause for all linked streams. | |
998 | */ | |
999 | static int snd_pcm_pause(snd_pcm_substream_t *substream, int push) | |
1000 | { | |
1001 | return snd_pcm_action(&snd_pcm_action_pause, substream, push); | |
1002 | } | |
1003 | ||
1004 | #ifdef CONFIG_PM | |
1005 | /* suspend */ | |
1006 | ||
1007 | static int snd_pcm_pre_suspend(snd_pcm_substream_t *substream, int state) | |
1008 | { | |
1009 | snd_pcm_runtime_t *runtime = substream->runtime; | |
1010 | if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) | |
1011 | return -EBUSY; | |
1012 | runtime->trigger_master = substream; | |
1013 | return 0; | |
1014 | } | |
1015 | ||
1016 | static int snd_pcm_do_suspend(snd_pcm_substream_t *substream, int state) | |
1017 | { | |
1018 | snd_pcm_runtime_t *runtime = substream->runtime; | |
1019 | if (runtime->trigger_master != substream) | |
1020 | return 0; | |
1021 | if (! snd_pcm_running(substream)) | |
1022 | return 0; | |
1023 | substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND); | |
1024 | return 0; /* suspend unconditionally */ | |
1025 | } | |
1026 | ||
1027 | static void snd_pcm_post_suspend(snd_pcm_substream_t *substream, int state) | |
1028 | { | |
1029 | snd_pcm_runtime_t *runtime = substream->runtime; | |
1030 | snd_pcm_trigger_tstamp(substream); | |
1031 | if (substream->timer) | |
a501dfa3 | 1032 | snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSUSPEND, &runtime->trigger_tstamp); |
1da177e4 LT |
1033 | runtime->status->suspended_state = runtime->status->state; |
1034 | runtime->status->state = SNDRV_PCM_STATE_SUSPENDED; | |
1035 | snd_pcm_tick_set(substream, 0); | |
1036 | wake_up(&runtime->sleep); | |
1037 | } | |
1038 | ||
1039 | static struct action_ops snd_pcm_action_suspend = { | |
1040 | .pre_action = snd_pcm_pre_suspend, | |
1041 | .do_action = snd_pcm_do_suspend, | |
1042 | .post_action = snd_pcm_post_suspend | |
1043 | }; | |
1044 | ||
1045 | /** | |
1046 | * snd_pcm_suspend | |
df8db936 | 1047 | * @substream: the PCM substream |
1da177e4 LT |
1048 | * |
1049 | * Trigger SUSPEND to all linked streams. | |
1050 | * After this call, all streams are changed to SUSPENDED state. | |
1051 | */ | |
1052 | int snd_pcm_suspend(snd_pcm_substream_t *substream) | |
1053 | { | |
1054 | int err; | |
1055 | unsigned long flags; | |
1056 | ||
1057 | snd_pcm_stream_lock_irqsave(substream, flags); | |
1058 | err = snd_pcm_action(&snd_pcm_action_suspend, substream, 0); | |
1059 | snd_pcm_stream_unlock_irqrestore(substream, flags); | |
1060 | return err; | |
1061 | } | |
1062 | ||
1063 | /** | |
1064 | * snd_pcm_suspend_all | |
df8db936 | 1065 | * @pcm: the PCM instance |
1da177e4 LT |
1066 | * |
1067 | * Trigger SUSPEND to all substreams in the given pcm. | |
1068 | * After this call, all streams are changed to SUSPENDED state. | |
1069 | */ | |
1070 | int snd_pcm_suspend_all(snd_pcm_t *pcm) | |
1071 | { | |
1072 | snd_pcm_substream_t *substream; | |
1073 | int stream, err = 0; | |
1074 | ||
1075 | for (stream = 0; stream < 2; stream++) { | |
1076 | for (substream = pcm->streams[stream].substream; substream; substream = substream->next) { | |
1077 | /* FIXME: the open/close code should lock this as well */ | |
1078 | if (substream->runtime == NULL) | |
1079 | continue; | |
1080 | err = snd_pcm_suspend(substream); | |
1081 | if (err < 0 && err != -EBUSY) | |
1082 | return err; | |
1083 | } | |
1084 | } | |
1085 | return 0; | |
1086 | } | |
1087 | ||
1088 | /* resume */ | |
1089 | ||
1090 | static int snd_pcm_pre_resume(snd_pcm_substream_t *substream, int state) | |
1091 | { | |
1092 | snd_pcm_runtime_t *runtime = substream->runtime; | |
1093 | if (!(runtime->info & SNDRV_PCM_INFO_RESUME)) | |
1094 | return -ENOSYS; | |
1095 | runtime->trigger_master = substream; | |
1096 | return 0; | |
1097 | } | |
1098 | ||
1099 | static int snd_pcm_do_resume(snd_pcm_substream_t *substream, int state) | |
1100 | { | |
1101 | snd_pcm_runtime_t *runtime = substream->runtime; | |
1102 | if (runtime->trigger_master != substream) | |
1103 | return 0; | |
1104 | /* DMA not running previously? */ | |
1105 | if (runtime->status->suspended_state != SNDRV_PCM_STATE_RUNNING && | |
1106 | (runtime->status->suspended_state != SNDRV_PCM_STATE_DRAINING || | |
1107 | substream->stream != SNDRV_PCM_STREAM_PLAYBACK)) | |
1108 | return 0; | |
1109 | return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_RESUME); | |
1110 | } | |
1111 | ||
1112 | static void snd_pcm_undo_resume(snd_pcm_substream_t *substream, int state) | |
1113 | { | |
1114 | if (substream->runtime->trigger_master == substream && | |
1115 | snd_pcm_running(substream)) | |
1116 | substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND); | |
1117 | } | |
1118 | ||
1119 | static void snd_pcm_post_resume(snd_pcm_substream_t *substream, int state) | |
1120 | { | |
1121 | snd_pcm_runtime_t *runtime = substream->runtime; | |
1122 | snd_pcm_trigger_tstamp(substream); | |
1123 | if (substream->timer) | |
a501dfa3 | 1124 | snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MRESUME, &runtime->trigger_tstamp); |
1da177e4 LT |
1125 | runtime->status->state = runtime->status->suspended_state; |
1126 | if (runtime->sleep_min) | |
1127 | snd_pcm_tick_prepare(substream); | |
1128 | } | |
1129 | ||
1130 | static struct action_ops snd_pcm_action_resume = { | |
1131 | .pre_action = snd_pcm_pre_resume, | |
1132 | .do_action = snd_pcm_do_resume, | |
1133 | .undo_action = snd_pcm_undo_resume, | |
1134 | .post_action = snd_pcm_post_resume | |
1135 | }; | |
1136 | ||
1137 | static int snd_pcm_resume(snd_pcm_substream_t *substream) | |
1138 | { | |
1139 | snd_card_t *card = substream->pcm->card; | |
1140 | int res; | |
1141 | ||
1142 | snd_power_lock(card); | |
1143 | if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0, substream->ffile)) >= 0) | |
1144 | res = snd_pcm_action_lock_irq(&snd_pcm_action_resume, substream, 0); | |
1145 | snd_power_unlock(card); | |
1146 | return res; | |
1147 | } | |
1148 | ||
1149 | #else | |
1150 | ||
1151 | static int snd_pcm_resume(snd_pcm_substream_t *substream) | |
1152 | { | |
1153 | return -ENOSYS; | |
1154 | } | |
1155 | ||
1156 | #endif /* CONFIG_PM */ | |
1157 | ||
1158 | /* | |
1159 | * xrun ioctl | |
1160 | * | |
1161 | * Change the RUNNING stream(s) to XRUN state. | |
1162 | */ | |
1163 | static int snd_pcm_xrun(snd_pcm_substream_t *substream) | |
1164 | { | |
1165 | snd_card_t *card = substream->pcm->card; | |
1166 | snd_pcm_runtime_t *runtime = substream->runtime; | |
1167 | int result; | |
1168 | ||
1169 | snd_power_lock(card); | |
1170 | if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { | |
1171 | result = snd_power_wait(card, SNDRV_CTL_POWER_D0, substream->ffile); | |
1172 | if (result < 0) | |
1173 | goto _unlock; | |
1174 | } | |
1175 | ||
1176 | snd_pcm_stream_lock_irq(substream); | |
1177 | switch (runtime->status->state) { | |
1178 | case SNDRV_PCM_STATE_XRUN: | |
1179 | result = 0; /* already there */ | |
1180 | break; | |
1181 | case SNDRV_PCM_STATE_RUNNING: | |
1182 | result = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN); | |
1183 | break; | |
1184 | default: | |
1185 | result = -EBADFD; | |
1186 | } | |
1187 | snd_pcm_stream_unlock_irq(substream); | |
1188 | _unlock: | |
1189 | snd_power_unlock(card); | |
1190 | return result; | |
1191 | } | |
1192 | ||
1193 | /* | |
1194 | * reset ioctl | |
1195 | */ | |
1196 | static int snd_pcm_pre_reset(snd_pcm_substream_t * substream, int state) | |
1197 | { | |
1198 | snd_pcm_runtime_t *runtime = substream->runtime; | |
1199 | switch (runtime->status->state) { | |
1200 | case SNDRV_PCM_STATE_RUNNING: | |
1201 | case SNDRV_PCM_STATE_PREPARED: | |
1202 | case SNDRV_PCM_STATE_PAUSED: | |
1203 | case SNDRV_PCM_STATE_SUSPENDED: | |
1204 | return 0; | |
1205 | default: | |
1206 | return -EBADFD; | |
1207 | } | |
1208 | } | |
1209 | ||
1210 | static int snd_pcm_do_reset(snd_pcm_substream_t * substream, int state) | |
1211 | { | |
1212 | snd_pcm_runtime_t *runtime = substream->runtime; | |
1213 | int err = substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL); | |
1214 | if (err < 0) | |
1215 | return err; | |
1216 | // snd_assert(runtime->status->hw_ptr < runtime->buffer_size, ); | |
1217 | runtime->hw_ptr_base = 0; | |
1218 | runtime->hw_ptr_interrupt = runtime->status->hw_ptr - runtime->status->hw_ptr % runtime->period_size; | |
1219 | runtime->silence_start = runtime->status->hw_ptr; | |
1220 | runtime->silence_filled = 0; | |
1221 | return 0; | |
1222 | } | |
1223 | ||
1224 | static void snd_pcm_post_reset(snd_pcm_substream_t * substream, int state) | |
1225 | { | |
1226 | snd_pcm_runtime_t *runtime = substream->runtime; | |
1227 | runtime->control->appl_ptr = runtime->status->hw_ptr; | |
1228 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && | |
1229 | runtime->silence_size > 0) | |
1230 | snd_pcm_playback_silence(substream, ULONG_MAX); | |
1231 | } | |
1232 | ||
1233 | static struct action_ops snd_pcm_action_reset = { | |
1234 | .pre_action = snd_pcm_pre_reset, | |
1235 | .do_action = snd_pcm_do_reset, | |
1236 | .post_action = snd_pcm_post_reset | |
1237 | }; | |
1238 | ||
1239 | static int snd_pcm_reset(snd_pcm_substream_t *substream) | |
1240 | { | |
1241 | return snd_pcm_action_nonatomic(&snd_pcm_action_reset, substream, 0); | |
1242 | } | |
1243 | ||
1244 | /* | |
1245 | * prepare ioctl | |
1246 | */ | |
1247 | static int snd_pcm_pre_prepare(snd_pcm_substream_t * substream, int state) | |
1248 | { | |
1249 | snd_pcm_runtime_t *runtime = substream->runtime; | |
1250 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) | |
1251 | return -EBADFD; | |
1252 | if (snd_pcm_running(substream)) | |
1253 | return -EBUSY; | |
1254 | return 0; | |
1255 | } | |
1256 | ||
1257 | static int snd_pcm_do_prepare(snd_pcm_substream_t * substream, int state) | |
1258 | { | |
1259 | int err; | |
1260 | err = substream->ops->prepare(substream); | |
1261 | if (err < 0) | |
1262 | return err; | |
1263 | return snd_pcm_do_reset(substream, 0); | |
1264 | } | |
1265 | ||
1266 | static void snd_pcm_post_prepare(snd_pcm_substream_t * substream, int state) | |
1267 | { | |
1268 | snd_pcm_runtime_t *runtime = substream->runtime; | |
1269 | runtime->control->appl_ptr = runtime->status->hw_ptr; | |
1270 | runtime->status->state = SNDRV_PCM_STATE_PREPARED; | |
1271 | } | |
1272 | ||
1273 | static struct action_ops snd_pcm_action_prepare = { | |
1274 | .pre_action = snd_pcm_pre_prepare, | |
1275 | .do_action = snd_pcm_do_prepare, | |
1276 | .post_action = snd_pcm_post_prepare | |
1277 | }; | |
1278 | ||
1279 | /** | |
1280 | * snd_pcm_prepare | |
df8db936 TI |
1281 | * @substream: the PCM substream instance |
1282 | * | |
1283 | * Prepare the PCM substream to be triggerable. | |
1da177e4 LT |
1284 | */ |
1285 | int snd_pcm_prepare(snd_pcm_substream_t *substream) | |
1286 | { | |
1287 | int res; | |
1288 | snd_card_t *card = substream->pcm->card; | |
1289 | ||
1290 | snd_power_lock(card); | |
1291 | if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0, substream->ffile)) >= 0) | |
1292 | res = snd_pcm_action_nonatomic(&snd_pcm_action_prepare, substream, 0); | |
1293 | snd_power_unlock(card); | |
1294 | return res; | |
1295 | } | |
1296 | ||
1297 | /* | |
1298 | * drain ioctl | |
1299 | */ | |
1300 | ||
1301 | static int snd_pcm_pre_drain_init(snd_pcm_substream_t * substream, int state) | |
1302 | { | |
1303 | if (substream->ffile->f_flags & O_NONBLOCK) | |
1304 | return -EAGAIN; | |
1305 | substream->runtime->trigger_master = substream; | |
1306 | return 0; | |
1307 | } | |
1308 | ||
1309 | static int snd_pcm_do_drain_init(snd_pcm_substream_t * substream, int state) | |
1310 | { | |
1311 | snd_pcm_runtime_t *runtime = substream->runtime; | |
1312 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { | |
1313 | switch (runtime->status->state) { | |
1314 | case SNDRV_PCM_STATE_PREPARED: | |
1315 | /* start playback stream if possible */ | |
1316 | if (! snd_pcm_playback_empty(substream)) { | |
1317 | snd_pcm_do_start(substream, SNDRV_PCM_STATE_DRAINING); | |
1318 | snd_pcm_post_start(substream, SNDRV_PCM_STATE_DRAINING); | |
1319 | } | |
1320 | break; | |
1321 | case SNDRV_PCM_STATE_RUNNING: | |
1322 | runtime->status->state = SNDRV_PCM_STATE_DRAINING; | |
1323 | break; | |
1324 | default: | |
1325 | break; | |
1326 | } | |
1327 | } else { | |
1328 | /* stop running stream */ | |
1329 | if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) { | |
1330 | int state = snd_pcm_capture_avail(runtime) > 0 ? | |
1331 | SNDRV_PCM_STATE_DRAINING : SNDRV_PCM_STATE_SETUP; | |
1332 | snd_pcm_do_stop(substream, state); | |
1333 | snd_pcm_post_stop(substream, state); | |
1334 | } | |
1335 | } | |
1336 | return 0; | |
1337 | } | |
1338 | ||
1339 | static void snd_pcm_post_drain_init(snd_pcm_substream_t * substream, int state) | |
1340 | { | |
1341 | } | |
1342 | ||
1343 | static struct action_ops snd_pcm_action_drain_init = { | |
1344 | .pre_action = snd_pcm_pre_drain_init, | |
1345 | .do_action = snd_pcm_do_drain_init, | |
1346 | .post_action = snd_pcm_post_drain_init | |
1347 | }; | |
1348 | ||
1349 | struct drain_rec { | |
1350 | snd_pcm_substream_t *substream; | |
1351 | wait_queue_t wait; | |
1352 | snd_pcm_uframes_t stop_threshold; | |
1353 | }; | |
1354 | ||
1355 | static int snd_pcm_drop(snd_pcm_substream_t *substream); | |
1356 | ||
1357 | /* | |
1358 | * Drain the stream(s). | |
1359 | * When the substream is linked, sync until the draining of all playback streams | |
1360 | * is finished. | |
1361 | * After this call, all streams are supposed to be either SETUP or DRAINING | |
1362 | * (capture only) state. | |
1363 | */ | |
1364 | static int snd_pcm_drain(snd_pcm_substream_t *substream) | |
1365 | { | |
1366 | snd_card_t *card; | |
1367 | snd_pcm_runtime_t *runtime; | |
1368 | struct list_head *pos; | |
1369 | int result = 0; | |
1370 | int i, num_drecs; | |
1371 | struct drain_rec *drec, drec_tmp, *d; | |
1372 | ||
1373 | snd_assert(substream != NULL, return -ENXIO); | |
1374 | card = substream->pcm->card; | |
1375 | runtime = substream->runtime; | |
1376 | ||
1377 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) | |
1378 | return -EBADFD; | |
1379 | ||
1da177e4 LT |
1380 | snd_power_lock(card); |
1381 | if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { | |
1382 | result = snd_power_wait(card, SNDRV_CTL_POWER_D0, substream->ffile); | |
21cb2a2e TI |
1383 | if (result < 0) { |
1384 | snd_power_unlock(card); | |
1385 | return result; | |
1386 | } | |
1da177e4 LT |
1387 | } |
1388 | ||
1389 | /* allocate temporary record for drain sync */ | |
21cb2a2e | 1390 | down_read(&snd_pcm_link_rwsem); |
1da177e4 LT |
1391 | if (snd_pcm_stream_linked(substream)) { |
1392 | drec = kmalloc(substream->group->count * sizeof(*drec), GFP_KERNEL); | |
1393 | if (! drec) { | |
21cb2a2e TI |
1394 | up_read(&snd_pcm_link_rwsem); |
1395 | snd_power_unlock(card); | |
1396 | return -ENOMEM; | |
1da177e4 LT |
1397 | } |
1398 | } else | |
1399 | drec = &drec_tmp; | |
1400 | ||
21cb2a2e | 1401 | /* count only playback streams */ |
1da177e4 LT |
1402 | num_drecs = 0; |
1403 | snd_pcm_group_for_each(pos, substream) { | |
1404 | snd_pcm_substream_t *s = snd_pcm_group_substream_entry(pos); | |
1405 | runtime = s->runtime; | |
1da177e4 LT |
1406 | if (s->stream == SNDRV_PCM_STREAM_PLAYBACK) { |
1407 | d = &drec[num_drecs++]; | |
1408 | d->substream = s; | |
1409 | init_waitqueue_entry(&d->wait, current); | |
1410 | add_wait_queue(&runtime->sleep, &d->wait); | |
1411 | /* stop_threshold fixup to avoid endless loop when | |
1412 | * stop_threshold > buffer_size | |
1413 | */ | |
1414 | d->stop_threshold = runtime->stop_threshold; | |
1415 | if (runtime->stop_threshold > runtime->buffer_size) | |
1416 | runtime->stop_threshold = runtime->buffer_size; | |
1417 | } | |
1418 | } | |
21cb2a2e | 1419 | up_read(&snd_pcm_link_rwsem); |
1da177e4 | 1420 | if (! num_drecs) |
21cb2a2e TI |
1421 | goto _error; |
1422 | ||
1423 | snd_pcm_stream_lock_irq(substream); | |
1424 | /* resume pause */ | |
1425 | if (runtime->status->state == SNDRV_PCM_STATE_PAUSED) | |
1426 | snd_pcm_pause(substream, 0); | |
1427 | ||
1428 | /* pre-start/stop - all running streams are changed to DRAINING state */ | |
1429 | result = snd_pcm_action(&snd_pcm_action_drain_init, substream, 0); | |
1430 | if (result < 0) { | |
1431 | snd_pcm_stream_unlock_irq(substream); | |
1432 | goto _error; | |
1433 | } | |
1da177e4 LT |
1434 | |
1435 | for (;;) { | |
1436 | long tout; | |
1437 | if (signal_pending(current)) { | |
1438 | result = -ERESTARTSYS; | |
1439 | break; | |
1440 | } | |
21cb2a2e TI |
1441 | /* all finished? */ |
1442 | for (i = 0; i < num_drecs; i++) { | |
1443 | runtime = drec[i].substream->runtime; | |
1444 | if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) | |
1445 | break; | |
1446 | } | |
1447 | if (i == num_drecs) | |
1448 | break; /* yes, all drained */ | |
1449 | ||
1da177e4 LT |
1450 | set_current_state(TASK_INTERRUPTIBLE); |
1451 | snd_pcm_stream_unlock_irq(substream); | |
1452 | snd_power_unlock(card); | |
1453 | tout = schedule_timeout(10 * HZ); | |
1454 | snd_power_lock(card); | |
1455 | snd_pcm_stream_lock_irq(substream); | |
1456 | if (tout == 0) { | |
1457 | if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) | |
1458 | result = -ESTRPIPE; | |
1459 | else { | |
1460 | snd_printd("playback drain error (DMA or IRQ trouble?)\n"); | |
1461 | snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP); | |
1462 | result = -EIO; | |
1463 | } | |
1464 | break; | |
1465 | } | |
1da177e4 | 1466 | } |
21cb2a2e TI |
1467 | |
1468 | snd_pcm_stream_unlock_irq(substream); | |
1469 | ||
1470 | _error: | |
1da177e4 LT |
1471 | for (i = 0; i < num_drecs; i++) { |
1472 | d = &drec[i]; | |
1473 | runtime = d->substream->runtime; | |
1474 | remove_wait_queue(&runtime->sleep, &d->wait); | |
1475 | runtime->stop_threshold = d->stop_threshold; | |
1476 | } | |
1477 | ||
1da177e4 LT |
1478 | if (drec != &drec_tmp) |
1479 | kfree(drec); | |
1da177e4 | 1480 | snd_power_unlock(card); |
1da177e4 LT |
1481 | |
1482 | return result; | |
1483 | } | |
1484 | ||
1485 | /* | |
1486 | * drop ioctl | |
1487 | * | |
1488 | * Immediately put all linked substreams into SETUP state. | |
1489 | */ | |
1490 | static int snd_pcm_drop(snd_pcm_substream_t *substream) | |
1491 | { | |
1492 | snd_pcm_runtime_t *runtime; | |
1493 | snd_card_t *card; | |
1494 | int result = 0; | |
1495 | ||
1496 | snd_assert(substream != NULL, return -ENXIO); | |
1497 | runtime = substream->runtime; | |
1498 | card = substream->pcm->card; | |
1499 | ||
1500 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) | |
1501 | return -EBADFD; | |
1502 | ||
1503 | snd_power_lock(card); | |
1504 | if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { | |
1505 | result = snd_power_wait(card, SNDRV_CTL_POWER_D0, substream->ffile); | |
1506 | if (result < 0) | |
1507 | goto _unlock; | |
1508 | } | |
1509 | ||
1510 | snd_pcm_stream_lock_irq(substream); | |
1511 | /* resume pause */ | |
1512 | if (runtime->status->state == SNDRV_PCM_STATE_PAUSED) | |
1513 | snd_pcm_pause(substream, 0); | |
1514 | ||
1515 | snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP); | |
1516 | /* runtime->control->appl_ptr = runtime->status->hw_ptr; */ | |
1517 | snd_pcm_stream_unlock_irq(substream); | |
1518 | _unlock: | |
1519 | snd_power_unlock(card); | |
1520 | return result; | |
1521 | } | |
1522 | ||
1523 | ||
1524 | /* WARNING: Don't forget to fput back the file */ | |
1da177e4 LT |
1525 | static struct file *snd_pcm_file_fd(int fd) |
1526 | { | |
1527 | struct file *file; | |
1528 | struct inode *inode; | |
1529 | unsigned short minor; | |
1530 | file = fget(fd); | |
1531 | if (!file) | |
1532 | return NULL; | |
1533 | inode = file->f_dentry->d_inode; | |
1534 | if (!S_ISCHR(inode->i_mode) || | |
1535 | imajor(inode) != snd_major) { | |
1536 | fput(file); | |
1537 | return NULL; | |
1538 | } | |
1539 | minor = iminor(inode); | |
1540 | if (minor >= 256 || | |
1541 | minor % SNDRV_MINOR_DEVICES < SNDRV_MINOR_PCM_PLAYBACK) { | |
1542 | fput(file); | |
1543 | return NULL; | |
1544 | } | |
1545 | return file; | |
1546 | } | |
1547 | ||
1548 | /* | |
1549 | * PCM link handling | |
1550 | */ | |
1551 | static int snd_pcm_link(snd_pcm_substream_t *substream, int fd) | |
1552 | { | |
1553 | int res = 0; | |
1554 | struct file *file; | |
1555 | snd_pcm_file_t *pcm_file; | |
1556 | snd_pcm_substream_t *substream1; | |
1557 | ||
1558 | file = snd_pcm_file_fd(fd); | |
1559 | if (!file) | |
1560 | return -EBADFD; | |
1561 | pcm_file = file->private_data; | |
1562 | substream1 = pcm_file->substream; | |
1563 | down_write(&snd_pcm_link_rwsem); | |
1564 | write_lock_irq(&snd_pcm_link_rwlock); | |
1565 | if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN || | |
1566 | substream->runtime->status->state != substream1->runtime->status->state) { | |
1567 | res = -EBADFD; | |
1568 | goto _end; | |
1569 | } | |
1570 | if (snd_pcm_stream_linked(substream1)) { | |
1571 | res = -EALREADY; | |
1572 | goto _end; | |
1573 | } | |
1574 | if (!snd_pcm_stream_linked(substream)) { | |
1575 | substream->group = kmalloc(sizeof(snd_pcm_group_t), GFP_ATOMIC); | |
1576 | if (substream->group == NULL) { | |
1577 | res = -ENOMEM; | |
1578 | goto _end; | |
1579 | } | |
1580 | spin_lock_init(&substream->group->lock); | |
1581 | INIT_LIST_HEAD(&substream->group->substreams); | |
1582 | list_add_tail(&substream->link_list, &substream->group->substreams); | |
1583 | substream->group->count = 1; | |
1584 | } | |
1585 | list_add_tail(&substream1->link_list, &substream->group->substreams); | |
1586 | substream->group->count++; | |
1587 | substream1->group = substream->group; | |
1588 | _end: | |
1589 | write_unlock_irq(&snd_pcm_link_rwlock); | |
1590 | up_write(&snd_pcm_link_rwsem); | |
1591 | fput(file); | |
1592 | return res; | |
1593 | } | |
1594 | ||
1595 | static void relink_to_local(snd_pcm_substream_t *substream) | |
1596 | { | |
1597 | substream->group = &substream->self_group; | |
1598 | INIT_LIST_HEAD(&substream->self_group.substreams); | |
1599 | list_add_tail(&substream->link_list, &substream->self_group.substreams); | |
1600 | } | |
1601 | ||
1602 | static int snd_pcm_unlink(snd_pcm_substream_t *substream) | |
1603 | { | |
1604 | struct list_head *pos; | |
1605 | int res = 0; | |
1606 | ||
1607 | down_write(&snd_pcm_link_rwsem); | |
1608 | write_lock_irq(&snd_pcm_link_rwlock); | |
1609 | if (!snd_pcm_stream_linked(substream)) { | |
1610 | res = -EALREADY; | |
1611 | goto _end; | |
1612 | } | |
1613 | list_del(&substream->link_list); | |
1614 | substream->group->count--; | |
1615 | if (substream->group->count == 1) { /* detach the last stream, too */ | |
1616 | snd_pcm_group_for_each(pos, substream) { | |
1617 | relink_to_local(snd_pcm_group_substream_entry(pos)); | |
1618 | break; | |
1619 | } | |
1620 | kfree(substream->group); | |
1621 | } | |
1622 | relink_to_local(substream); | |
1623 | _end: | |
1624 | write_unlock_irq(&snd_pcm_link_rwlock); | |
1625 | up_write(&snd_pcm_link_rwsem); | |
1626 | return res; | |
1627 | } | |
1628 | ||
1629 | /* | |
1630 | * hw configurator | |
1631 | */ | |
1632 | static int snd_pcm_hw_rule_mul(snd_pcm_hw_params_t *params, | |
1633 | snd_pcm_hw_rule_t *rule) | |
1634 | { | |
1635 | snd_interval_t t; | |
1636 | snd_interval_mul(hw_param_interval_c(params, rule->deps[0]), | |
1637 | hw_param_interval_c(params, rule->deps[1]), &t); | |
1638 | return snd_interval_refine(hw_param_interval(params, rule->var), &t); | |
1639 | } | |
1640 | ||
1641 | static int snd_pcm_hw_rule_div(snd_pcm_hw_params_t *params, | |
1642 | snd_pcm_hw_rule_t *rule) | |
1643 | { | |
1644 | snd_interval_t t; | |
1645 | snd_interval_div(hw_param_interval_c(params, rule->deps[0]), | |
1646 | hw_param_interval_c(params, rule->deps[1]), &t); | |
1647 | return snd_interval_refine(hw_param_interval(params, rule->var), &t); | |
1648 | } | |
1649 | ||
1650 | static int snd_pcm_hw_rule_muldivk(snd_pcm_hw_params_t *params, | |
1651 | snd_pcm_hw_rule_t *rule) | |
1652 | { | |
1653 | snd_interval_t t; | |
1654 | snd_interval_muldivk(hw_param_interval_c(params, rule->deps[0]), | |
1655 | hw_param_interval_c(params, rule->deps[1]), | |
1656 | (unsigned long) rule->private, &t); | |
1657 | return snd_interval_refine(hw_param_interval(params, rule->var), &t); | |
1658 | } | |
1659 | ||
1660 | static int snd_pcm_hw_rule_mulkdiv(snd_pcm_hw_params_t *params, | |
1661 | snd_pcm_hw_rule_t *rule) | |
1662 | { | |
1663 | snd_interval_t t; | |
1664 | snd_interval_mulkdiv(hw_param_interval_c(params, rule->deps[0]), | |
1665 | (unsigned long) rule->private, | |
1666 | hw_param_interval_c(params, rule->deps[1]), &t); | |
1667 | return snd_interval_refine(hw_param_interval(params, rule->var), &t); | |
1668 | } | |
1669 | ||
1670 | static int snd_pcm_hw_rule_format(snd_pcm_hw_params_t *params, | |
1671 | snd_pcm_hw_rule_t *rule) | |
1672 | { | |
1673 | unsigned int k; | |
1674 | snd_interval_t *i = hw_param_interval(params, rule->deps[0]); | |
1675 | snd_mask_t m; | |
1676 | snd_mask_t *mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); | |
1677 | snd_mask_any(&m); | |
1678 | for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) { | |
1679 | int bits; | |
1680 | if (! snd_mask_test(mask, k)) | |
1681 | continue; | |
1682 | bits = snd_pcm_format_physical_width(k); | |
1683 | if (bits <= 0) | |
1684 | continue; /* ignore invalid formats */ | |
1685 | if ((unsigned)bits < i->min || (unsigned)bits > i->max) | |
1686 | snd_mask_reset(&m, k); | |
1687 | } | |
1688 | return snd_mask_refine(mask, &m); | |
1689 | } | |
1690 | ||
1691 | static int snd_pcm_hw_rule_sample_bits(snd_pcm_hw_params_t *params, | |
1692 | snd_pcm_hw_rule_t *rule) | |
1693 | { | |
1694 | snd_interval_t t; | |
1695 | unsigned int k; | |
1696 | t.min = UINT_MAX; | |
1697 | t.max = 0; | |
1698 | t.openmin = 0; | |
1699 | t.openmax = 0; | |
1700 | for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) { | |
1701 | int bits; | |
1702 | if (! snd_mask_test(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), k)) | |
1703 | continue; | |
1704 | bits = snd_pcm_format_physical_width(k); | |
1705 | if (bits <= 0) | |
1706 | continue; /* ignore invalid formats */ | |
1707 | if (t.min > (unsigned)bits) | |
1708 | t.min = bits; | |
1709 | if (t.max < (unsigned)bits) | |
1710 | t.max = bits; | |
1711 | } | |
1712 | t.integer = 1; | |
1713 | return snd_interval_refine(hw_param_interval(params, rule->var), &t); | |
1714 | } | |
1715 | ||
1716 | #if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12 | |
1717 | #error "Change this table" | |
1718 | #endif | |
1719 | ||
1720 | static unsigned int rates[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100, | |
1721 | 48000, 64000, 88200, 96000, 176400, 192000 }; | |
1722 | ||
1723 | static int snd_pcm_hw_rule_rate(snd_pcm_hw_params_t *params, | |
1724 | snd_pcm_hw_rule_t *rule) | |
1725 | { | |
1726 | snd_pcm_hardware_t *hw = rule->private; | |
1727 | return snd_interval_list(hw_param_interval(params, rule->var), | |
1728 | ARRAY_SIZE(rates), rates, hw->rates); | |
1729 | } | |
1730 | ||
1731 | static int snd_pcm_hw_rule_buffer_bytes_max(snd_pcm_hw_params_t *params, | |
1732 | snd_pcm_hw_rule_t *rule) | |
1733 | { | |
1734 | snd_interval_t t; | |
1735 | snd_pcm_substream_t *substream = rule->private; | |
1736 | t.min = 0; | |
1737 | t.max = substream->buffer_bytes_max; | |
1738 | t.openmin = 0; | |
1739 | t.openmax = 0; | |
1740 | t.integer = 1; | |
1741 | return snd_interval_refine(hw_param_interval(params, rule->var), &t); | |
1742 | } | |
1743 | ||
1744 | int snd_pcm_hw_constraints_init(snd_pcm_substream_t *substream) | |
1745 | { | |
1746 | snd_pcm_runtime_t *runtime = substream->runtime; | |
1747 | snd_pcm_hw_constraints_t *constrs = &runtime->hw_constraints; | |
1748 | int k, err; | |
1749 | ||
1750 | for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) { | |
1751 | snd_mask_any(constrs_mask(constrs, k)); | |
1752 | } | |
1753 | ||
1754 | for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) { | |
1755 | snd_interval_any(constrs_interval(constrs, k)); | |
1756 | } | |
1757 | ||
1758 | snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS)); | |
1759 | snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE)); | |
1760 | snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES)); | |
1761 | snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS)); | |
1762 | snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS)); | |
1763 | ||
1764 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT, | |
1765 | snd_pcm_hw_rule_format, NULL, | |
1766 | SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); | |
1767 | if (err < 0) | |
1768 | return err; | |
1769 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, | |
1770 | snd_pcm_hw_rule_sample_bits, NULL, | |
1771 | SNDRV_PCM_HW_PARAM_FORMAT, | |
1772 | SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); | |
1773 | if (err < 0) | |
1774 | return err; | |
1775 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, | |
1776 | snd_pcm_hw_rule_div, NULL, | |
1777 | SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1); | |
1778 | if (err < 0) | |
1779 | return err; | |
1780 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, | |
1781 | snd_pcm_hw_rule_mul, NULL, | |
1782 | SNDRV_PCM_HW_PARAM_SAMPLE_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1); | |
1783 | if (err < 0) | |
1784 | return err; | |
1785 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, | |
1786 | snd_pcm_hw_rule_mulkdiv, (void*) 8, | |
1787 | SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1); | |
1788 | if (err < 0) | |
1789 | return err; | |
1790 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, | |
1791 | snd_pcm_hw_rule_mulkdiv, (void*) 8, | |
1792 | SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1); | |
1793 | if (err < 0) | |
1794 | return err; | |
1795 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS, | |
1796 | snd_pcm_hw_rule_div, NULL, | |
1797 | SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); | |
1798 | if (err < 0) | |
1799 | return err; | |
1800 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, | |
1801 | snd_pcm_hw_rule_mulkdiv, (void*) 1000000, | |
1802 | SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, -1); | |
1803 | if (err < 0) | |
1804 | return err; | |
1805 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, | |
1806 | snd_pcm_hw_rule_mulkdiv, (void*) 1000000, | |
1807 | SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_BUFFER_TIME, -1); | |
1808 | if (err < 0) | |
1809 | return err; | |
1810 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS, | |
1811 | snd_pcm_hw_rule_div, NULL, | |
1812 | SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1); | |
1813 | if (err < 0) | |
1814 | return err; | |
1815 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, | |
1816 | snd_pcm_hw_rule_div, NULL, | |
1817 | SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1); | |
1818 | if (err < 0) | |
1819 | return err; | |
1820 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, | |
1821 | snd_pcm_hw_rule_mulkdiv, (void*) 8, | |
1822 | SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); | |
1823 | if (err < 0) | |
1824 | return err; | |
1825 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, | |
1826 | snd_pcm_hw_rule_muldivk, (void*) 1000000, | |
1827 | SNDRV_PCM_HW_PARAM_PERIOD_TIME, SNDRV_PCM_HW_PARAM_RATE, -1); | |
1828 | if (err < 0) | |
1829 | return err; | |
1830 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, | |
1831 | snd_pcm_hw_rule_mul, NULL, | |
1832 | SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1); | |
1833 | if (err < 0) | |
1834 | return err; | |
1835 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, | |
1836 | snd_pcm_hw_rule_mulkdiv, (void*) 8, | |
1837 | SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); | |
1838 | if (err < 0) | |
1839 | return err; | |
1840 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, | |
1841 | snd_pcm_hw_rule_muldivk, (void*) 1000000, | |
1842 | SNDRV_PCM_HW_PARAM_BUFFER_TIME, SNDRV_PCM_HW_PARAM_RATE, -1); | |
1843 | if (err < 0) | |
1844 | return err; | |
1845 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, | |
1846 | snd_pcm_hw_rule_muldivk, (void*) 8, | |
1847 | SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); | |
1848 | if (err < 0) | |
1849 | return err; | |
1850 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, | |
1851 | snd_pcm_hw_rule_muldivk, (void*) 8, | |
1852 | SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); | |
1853 | if (err < 0) | |
1854 | return err; | |
1855 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME, | |
1856 | snd_pcm_hw_rule_mulkdiv, (void*) 1000000, | |
1857 | SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1); | |
1858 | if (err < 0) | |
1859 | return err; | |
1860 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME, | |
1861 | snd_pcm_hw_rule_mulkdiv, (void*) 1000000, | |
1862 | SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1); | |
1863 | if (err < 0) | |
1864 | return err; | |
1865 | return 0; | |
1866 | } | |
1867 | ||
1868 | int snd_pcm_hw_constraints_complete(snd_pcm_substream_t *substream) | |
1869 | { | |
1870 | snd_pcm_runtime_t *runtime = substream->runtime; | |
1871 | snd_pcm_hardware_t *hw = &runtime->hw; | |
1872 | int err; | |
1873 | unsigned int mask = 0; | |
1874 | ||
1875 | if (hw->info & SNDRV_PCM_INFO_INTERLEAVED) | |
1876 | mask |= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED; | |
1877 | if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED) | |
1878 | mask |= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED; | |
1879 | if (hw->info & SNDRV_PCM_INFO_MMAP) { | |
1880 | if (hw->info & SNDRV_PCM_INFO_INTERLEAVED) | |
1881 | mask |= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED; | |
1882 | if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED) | |
1883 | mask |= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED; | |
1884 | if (hw->info & SNDRV_PCM_INFO_COMPLEX) | |
1885 | mask |= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX; | |
1886 | } | |
1887 | err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask); | |
1888 | snd_assert(err >= 0, return -EINVAL); | |
1889 | ||
1890 | err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats); | |
1891 | snd_assert(err >= 0, return -EINVAL); | |
1892 | ||
1893 | err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT, 1 << SNDRV_PCM_SUBFORMAT_STD); | |
1894 | snd_assert(err >= 0, return -EINVAL); | |
1895 | ||
1896 | err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS, | |
1897 | hw->channels_min, hw->channels_max); | |
1898 | snd_assert(err >= 0, return -EINVAL); | |
1899 | ||
1900 | err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE, | |
1901 | hw->rate_min, hw->rate_max); | |
1902 | snd_assert(err >= 0, return -EINVAL); | |
1903 | ||
1904 | err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, | |
1905 | hw->period_bytes_min, hw->period_bytes_max); | |
1906 | snd_assert(err >= 0, return -EINVAL); | |
1907 | ||
1908 | err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS, | |
1909 | hw->periods_min, hw->periods_max); | |
1910 | snd_assert(err >= 0, return -EINVAL); | |
1911 | ||
1912 | err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, | |
1913 | hw->period_bytes_min, hw->buffer_bytes_max); | |
1914 | snd_assert(err >= 0, return -EINVAL); | |
1915 | ||
1916 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, | |
1917 | snd_pcm_hw_rule_buffer_bytes_max, substream, | |
1918 | SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1); | |
1919 | if (err < 0) | |
1920 | return err; | |
1921 | ||
1922 | /* FIXME: remove */ | |
1923 | if (runtime->dma_bytes) { | |
1924 | err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes); | |
1925 | snd_assert(err >= 0, return -EINVAL); | |
1926 | } | |
1927 | ||
1928 | if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) { | |
1929 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, | |
1930 | snd_pcm_hw_rule_rate, hw, | |
1931 | SNDRV_PCM_HW_PARAM_RATE, -1); | |
1932 | if (err < 0) | |
1933 | return err; | |
1934 | } | |
1935 | ||
1936 | /* FIXME: this belong to lowlevel */ | |
1937 | snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_TICK_TIME, | |
1938 | 1000000 / HZ, 1000000 / HZ); | |
1939 | snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE); | |
1940 | ||
1941 | return 0; | |
1942 | } | |
1943 | ||
1944 | static void snd_pcm_add_file(snd_pcm_str_t *str, | |
1945 | snd_pcm_file_t *pcm_file) | |
1946 | { | |
1947 | pcm_file->next = str->files; | |
1948 | str->files = pcm_file; | |
1949 | } | |
1950 | ||
1951 | static void snd_pcm_remove_file(snd_pcm_str_t *str, | |
1952 | snd_pcm_file_t *pcm_file) | |
1953 | { | |
1954 | snd_pcm_file_t * pcm_file1; | |
1955 | if (str->files == pcm_file) { | |
1956 | str->files = pcm_file->next; | |
1957 | } else { | |
1958 | pcm_file1 = str->files; | |
1959 | while (pcm_file1 && pcm_file1->next != pcm_file) | |
1960 | pcm_file1 = pcm_file1->next; | |
1961 | if (pcm_file1 != NULL) | |
1962 | pcm_file1->next = pcm_file->next; | |
1963 | } | |
1964 | } | |
1965 | ||
1966 | static int snd_pcm_release_file(snd_pcm_file_t * pcm_file) | |
1967 | { | |
1968 | snd_pcm_substream_t *substream; | |
1969 | snd_pcm_runtime_t *runtime; | |
1970 | snd_pcm_str_t * str; | |
1971 | ||
1972 | snd_assert(pcm_file != NULL, return -ENXIO); | |
1973 | substream = pcm_file->substream; | |
1974 | snd_assert(substream != NULL, return -ENXIO); | |
1975 | runtime = substream->runtime; | |
1976 | str = substream->pstr; | |
1977 | snd_pcm_unlink(substream); | |
443feb88 | 1978 | if (substream->ffile != NULL) { |
1da177e4 LT |
1979 | if (substream->ops->hw_free != NULL) |
1980 | substream->ops->hw_free(substream); | |
1981 | substream->ops->close(substream); | |
443feb88 | 1982 | substream->ffile = NULL; |
1da177e4 | 1983 | } |
1da177e4 LT |
1984 | snd_pcm_remove_file(str, pcm_file); |
1985 | snd_pcm_release_substream(substream); | |
1986 | kfree(pcm_file); | |
1987 | return 0; | |
1988 | } | |
1989 | ||
1990 | static int snd_pcm_open_file(struct file *file, | |
1991 | snd_pcm_t *pcm, | |
1992 | int stream, | |
1993 | snd_pcm_file_t **rpcm_file) | |
1994 | { | |
1995 | int err = 0; | |
1996 | snd_pcm_file_t *pcm_file; | |
1997 | snd_pcm_substream_t *substream; | |
1998 | snd_pcm_str_t *str; | |
1999 | ||
2000 | snd_assert(rpcm_file != NULL, return -EINVAL); | |
2001 | *rpcm_file = NULL; | |
2002 | ||
ca2c0966 | 2003 | pcm_file = kzalloc(sizeof(*pcm_file), GFP_KERNEL); |
1da177e4 LT |
2004 | if (pcm_file == NULL) { |
2005 | return -ENOMEM; | |
2006 | } | |
2007 | ||
2008 | if ((err = snd_pcm_open_substream(pcm, stream, &substream)) < 0) { | |
2009 | kfree(pcm_file); | |
2010 | return err; | |
2011 | } | |
2012 | ||
2013 | str = substream->pstr; | |
2014 | substream->file = pcm_file; | |
2015 | substream->no_mmap_ctrl = 0; | |
2016 | ||
2017 | pcm_file->substream = substream; | |
2018 | ||
2019 | snd_pcm_add_file(str, pcm_file); | |
2020 | ||
2021 | err = snd_pcm_hw_constraints_init(substream); | |
2022 | if (err < 0) { | |
2023 | snd_printd("snd_pcm_hw_constraints_init failed\n"); | |
2024 | snd_pcm_release_file(pcm_file); | |
2025 | return err; | |
2026 | } | |
2027 | ||
2028 | if ((err = substream->ops->open(substream)) < 0) { | |
2029 | snd_pcm_release_file(pcm_file); | |
2030 | return err; | |
2031 | } | |
443feb88 | 2032 | substream->ffile = file; |
1da177e4 LT |
2033 | |
2034 | err = snd_pcm_hw_constraints_complete(substream); | |
2035 | if (err < 0) { | |
2036 | snd_printd("snd_pcm_hw_constraints_complete failed\n"); | |
1da177e4 LT |
2037 | snd_pcm_release_file(pcm_file); |
2038 | return err; | |
2039 | } | |
2040 | ||
1da177e4 LT |
2041 | file->private_data = pcm_file; |
2042 | *rpcm_file = pcm_file; | |
2043 | return 0; | |
2044 | } | |
2045 | ||
2046 | static int snd_pcm_open(struct inode *inode, struct file *file) | |
2047 | { | |
2048 | int cardnum = SNDRV_MINOR_CARD(iminor(inode)); | |
2049 | int device = SNDRV_MINOR_DEVICE(iminor(inode)); | |
2050 | int err; | |
2051 | snd_pcm_t *pcm; | |
2052 | snd_pcm_file_t *pcm_file; | |
2053 | wait_queue_t wait; | |
2054 | ||
7c22f1aa TI |
2055 | if (device < SNDRV_MINOR_PCM_PLAYBACK || device >= SNDRV_MINOR_DEVICES) |
2056 | return -ENXIO; | |
1da177e4 LT |
2057 | pcm = snd_pcm_devices[(cardnum * SNDRV_PCM_DEVICES) + (device % SNDRV_MINOR_PCMS)]; |
2058 | if (pcm == NULL) { | |
2059 | err = -ENODEV; | |
2060 | goto __error1; | |
2061 | } | |
2062 | err = snd_card_file_add(pcm->card, file); | |
2063 | if (err < 0) | |
2064 | goto __error1; | |
2065 | if (!try_module_get(pcm->card->module)) { | |
2066 | err = -EFAULT; | |
2067 | goto __error2; | |
2068 | } | |
2069 | init_waitqueue_entry(&wait, current); | |
2070 | add_wait_queue(&pcm->open_wait, &wait); | |
2071 | down(&pcm->open_mutex); | |
2072 | while (1) { | |
2073 | err = snd_pcm_open_file(file, pcm, device >= SNDRV_MINOR_PCM_CAPTURE ? SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK, &pcm_file); | |
2074 | if (err >= 0) | |
2075 | break; | |
2076 | if (err == -EAGAIN) { | |
2077 | if (file->f_flags & O_NONBLOCK) { | |
2078 | err = -EBUSY; | |
2079 | break; | |
2080 | } | |
2081 | } else | |
2082 | break; | |
2083 | set_current_state(TASK_INTERRUPTIBLE); | |
2084 | up(&pcm->open_mutex); | |
2085 | schedule(); | |
2086 | down(&pcm->open_mutex); | |
2087 | if (signal_pending(current)) { | |
2088 | err = -ERESTARTSYS; | |
2089 | break; | |
2090 | } | |
2091 | } | |
2092 | remove_wait_queue(&pcm->open_wait, &wait); | |
2093 | up(&pcm->open_mutex); | |
2094 | if (err < 0) | |
2095 | goto __error; | |
2096 | return err; | |
2097 | ||
2098 | __error: | |
2099 | module_put(pcm->card->module); | |
2100 | __error2: | |
2101 | snd_card_file_remove(pcm->card, file); | |
2102 | __error1: | |
2103 | return err; | |
2104 | } | |
2105 | ||
2106 | static int snd_pcm_release(struct inode *inode, struct file *file) | |
2107 | { | |
2108 | snd_pcm_t *pcm; | |
2109 | snd_pcm_substream_t *substream; | |
2110 | snd_pcm_file_t *pcm_file; | |
2111 | ||
2112 | pcm_file = file->private_data; | |
2113 | substream = pcm_file->substream; | |
2114 | snd_assert(substream != NULL, return -ENXIO); | |
2115 | snd_assert(!atomic_read(&substream->runtime->mmap_count), ); | |
2116 | pcm = substream->pcm; | |
2117 | snd_pcm_drop(substream); | |
2118 | fasync_helper(-1, file, 0, &substream->runtime->fasync); | |
2119 | down(&pcm->open_mutex); | |
2120 | snd_pcm_release_file(pcm_file); | |
2121 | up(&pcm->open_mutex); | |
2122 | wake_up(&pcm->open_wait); | |
2123 | module_put(pcm->card->module); | |
2124 | snd_card_file_remove(pcm->card, file); | |
2125 | return 0; | |
2126 | } | |
2127 | ||
2128 | static snd_pcm_sframes_t snd_pcm_playback_rewind(snd_pcm_substream_t *substream, snd_pcm_uframes_t frames) | |
2129 | { | |
2130 | snd_pcm_runtime_t *runtime = substream->runtime; | |
2131 | snd_pcm_sframes_t appl_ptr; | |
2132 | snd_pcm_sframes_t ret; | |
2133 | snd_pcm_sframes_t hw_avail; | |
2134 | ||
2135 | if (frames == 0) | |
2136 | return 0; | |
2137 | ||
2138 | snd_pcm_stream_lock_irq(substream); | |
2139 | switch (runtime->status->state) { | |
2140 | case SNDRV_PCM_STATE_PREPARED: | |
2141 | break; | |
2142 | case SNDRV_PCM_STATE_DRAINING: | |
2143 | case SNDRV_PCM_STATE_RUNNING: | |
2144 | if (snd_pcm_update_hw_ptr(substream) >= 0) | |
2145 | break; | |
2146 | /* Fall through */ | |
2147 | case SNDRV_PCM_STATE_XRUN: | |
2148 | ret = -EPIPE; | |
2149 | goto __end; | |
2150 | default: | |
2151 | ret = -EBADFD; | |
2152 | goto __end; | |
2153 | } | |
2154 | ||
2155 | hw_avail = snd_pcm_playback_hw_avail(runtime); | |
2156 | if (hw_avail <= 0) { | |
2157 | ret = 0; | |
2158 | goto __end; | |
2159 | } | |
2160 | if (frames > (snd_pcm_uframes_t)hw_avail) | |
2161 | frames = hw_avail; | |
2162 | else | |
2163 | frames -= frames % runtime->xfer_align; | |
2164 | appl_ptr = runtime->control->appl_ptr - frames; | |
2165 | if (appl_ptr < 0) | |
2166 | appl_ptr += runtime->boundary; | |
2167 | runtime->control->appl_ptr = appl_ptr; | |
2168 | if (runtime->status->state == SNDRV_PCM_STATE_RUNNING && | |
2169 | runtime->sleep_min) | |
2170 | snd_pcm_tick_prepare(substream); | |
2171 | ret = frames; | |
2172 | __end: | |
2173 | snd_pcm_stream_unlock_irq(substream); | |
2174 | return ret; | |
2175 | } | |
2176 | ||
2177 | static snd_pcm_sframes_t snd_pcm_capture_rewind(snd_pcm_substream_t *substream, snd_pcm_uframes_t frames) | |
2178 | { | |
2179 | snd_pcm_runtime_t *runtime = substream->runtime; | |
2180 | snd_pcm_sframes_t appl_ptr; | |
2181 | snd_pcm_sframes_t ret; | |
2182 | snd_pcm_sframes_t hw_avail; | |
2183 | ||
2184 | if (frames == 0) | |
2185 | return 0; | |
2186 | ||
2187 | snd_pcm_stream_lock_irq(substream); | |
2188 | switch (runtime->status->state) { | |
2189 | case SNDRV_PCM_STATE_PREPARED: | |
2190 | case SNDRV_PCM_STATE_DRAINING: | |
2191 | break; | |
2192 | case SNDRV_PCM_STATE_RUNNING: | |
2193 | if (snd_pcm_update_hw_ptr(substream) >= 0) | |
2194 | break; | |
2195 | /* Fall through */ | |
2196 | case SNDRV_PCM_STATE_XRUN: | |
2197 | ret = -EPIPE; | |
2198 | goto __end; | |
2199 | default: | |
2200 | ret = -EBADFD; | |
2201 | goto __end; | |
2202 | } | |
2203 | ||
2204 | hw_avail = snd_pcm_capture_hw_avail(runtime); | |
2205 | if (hw_avail <= 0) { | |
2206 | ret = 0; | |
2207 | goto __end; | |
2208 | } | |
2209 | if (frames > (snd_pcm_uframes_t)hw_avail) | |
2210 | frames = hw_avail; | |
2211 | else | |
2212 | frames -= frames % runtime->xfer_align; | |
2213 | appl_ptr = runtime->control->appl_ptr - frames; | |
2214 | if (appl_ptr < 0) | |
2215 | appl_ptr += runtime->boundary; | |
2216 | runtime->control->appl_ptr = appl_ptr; | |
2217 | if (runtime->status->state == SNDRV_PCM_STATE_RUNNING && | |
2218 | runtime->sleep_min) | |
2219 | snd_pcm_tick_prepare(substream); | |
2220 | ret = frames; | |
2221 | __end: | |
2222 | snd_pcm_stream_unlock_irq(substream); | |
2223 | return ret; | |
2224 | } | |
2225 | ||
2226 | static snd_pcm_sframes_t snd_pcm_playback_forward(snd_pcm_substream_t *substream, snd_pcm_uframes_t frames) | |
2227 | { | |
2228 | snd_pcm_runtime_t *runtime = substream->runtime; | |
2229 | snd_pcm_sframes_t appl_ptr; | |
2230 | snd_pcm_sframes_t ret; | |
2231 | snd_pcm_sframes_t avail; | |
2232 | ||
2233 | if (frames == 0) | |
2234 | return 0; | |
2235 | ||
2236 | snd_pcm_stream_lock_irq(substream); | |
2237 | switch (runtime->status->state) { | |
2238 | case SNDRV_PCM_STATE_PREPARED: | |
2239 | case SNDRV_PCM_STATE_PAUSED: | |
2240 | break; | |
2241 | case SNDRV_PCM_STATE_DRAINING: | |
2242 | case SNDRV_PCM_STATE_RUNNING: | |
2243 | if (snd_pcm_update_hw_ptr(substream) >= 0) | |
2244 | break; | |
2245 | /* Fall through */ | |
2246 | case SNDRV_PCM_STATE_XRUN: | |
2247 | ret = -EPIPE; | |
2248 | goto __end; | |
2249 | default: | |
2250 | ret = -EBADFD; | |
2251 | goto __end; | |
2252 | } | |
2253 | ||
2254 | avail = snd_pcm_playback_avail(runtime); | |
2255 | if (avail <= 0) { | |
2256 | ret = 0; | |
2257 | goto __end; | |
2258 | } | |
2259 | if (frames > (snd_pcm_uframes_t)avail) | |
2260 | frames = avail; | |
2261 | else | |
2262 | frames -= frames % runtime->xfer_align; | |
2263 | appl_ptr = runtime->control->appl_ptr + frames; | |
2264 | if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary) | |
2265 | appl_ptr -= runtime->boundary; | |
2266 | runtime->control->appl_ptr = appl_ptr; | |
2267 | if (runtime->status->state == SNDRV_PCM_STATE_RUNNING && | |
2268 | runtime->sleep_min) | |
2269 | snd_pcm_tick_prepare(substream); | |
2270 | ret = frames; | |
2271 | __end: | |
2272 | snd_pcm_stream_unlock_irq(substream); | |
2273 | return ret; | |
2274 | } | |
2275 | ||
2276 | static snd_pcm_sframes_t snd_pcm_capture_forward(snd_pcm_substream_t *substream, snd_pcm_uframes_t frames) | |
2277 | { | |
2278 | snd_pcm_runtime_t *runtime = substream->runtime; | |
2279 | snd_pcm_sframes_t appl_ptr; | |
2280 | snd_pcm_sframes_t ret; | |
2281 | snd_pcm_sframes_t avail; | |
2282 | ||
2283 | if (frames == 0) | |
2284 | return 0; | |
2285 | ||
2286 | snd_pcm_stream_lock_irq(substream); | |
2287 | switch (runtime->status->state) { | |
2288 | case SNDRV_PCM_STATE_PREPARED: | |
2289 | case SNDRV_PCM_STATE_DRAINING: | |
2290 | case SNDRV_PCM_STATE_PAUSED: | |
2291 | break; | |
2292 | case SNDRV_PCM_STATE_RUNNING: | |
2293 | if (snd_pcm_update_hw_ptr(substream) >= 0) | |
2294 | break; | |
2295 | /* Fall through */ | |
2296 | case SNDRV_PCM_STATE_XRUN: | |
2297 | ret = -EPIPE; | |
2298 | goto __end; | |
2299 | default: | |
2300 | ret = -EBADFD; | |
2301 | goto __end; | |
2302 | } | |
2303 | ||
2304 | avail = snd_pcm_capture_avail(runtime); | |
2305 | if (avail <= 0) { | |
2306 | ret = 0; | |
2307 | goto __end; | |
2308 | } | |
2309 | if (frames > (snd_pcm_uframes_t)avail) | |
2310 | frames = avail; | |
2311 | else | |
2312 | frames -= frames % runtime->xfer_align; | |
2313 | appl_ptr = runtime->control->appl_ptr + frames; | |
2314 | if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary) | |
2315 | appl_ptr -= runtime->boundary; | |
2316 | runtime->control->appl_ptr = appl_ptr; | |
2317 | if (runtime->status->state == SNDRV_PCM_STATE_RUNNING && | |
2318 | runtime->sleep_min) | |
2319 | snd_pcm_tick_prepare(substream); | |
2320 | ret = frames; | |
2321 | __end: | |
2322 | snd_pcm_stream_unlock_irq(substream); | |
2323 | return ret; | |
2324 | } | |
2325 | ||
2326 | static int snd_pcm_hwsync(snd_pcm_substream_t *substream) | |
2327 | { | |
2328 | snd_pcm_runtime_t *runtime = substream->runtime; | |
2329 | int err; | |
2330 | ||
2331 | snd_pcm_stream_lock_irq(substream); | |
2332 | switch (runtime->status->state) { | |
2333 | case SNDRV_PCM_STATE_DRAINING: | |
2334 | if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) | |
2335 | goto __badfd; | |
2336 | case SNDRV_PCM_STATE_RUNNING: | |
2337 | if ((err = snd_pcm_update_hw_ptr(substream)) < 0) | |
2338 | break; | |
2339 | /* Fall through */ | |
2340 | case SNDRV_PCM_STATE_PREPARED: | |
2341 | case SNDRV_PCM_STATE_SUSPENDED: | |
2342 | err = 0; | |
2343 | break; | |
2344 | case SNDRV_PCM_STATE_XRUN: | |
2345 | err = -EPIPE; | |
2346 | break; | |
2347 | default: | |
2348 | __badfd: | |
2349 | err = -EBADFD; | |
2350 | break; | |
2351 | } | |
2352 | snd_pcm_stream_unlock_irq(substream); | |
2353 | return err; | |
2354 | } | |
2355 | ||
2356 | static int snd_pcm_delay(snd_pcm_substream_t *substream, snd_pcm_sframes_t __user *res) | |
2357 | { | |
2358 | snd_pcm_runtime_t *runtime = substream->runtime; | |
2359 | int err; | |
2360 | snd_pcm_sframes_t n = 0; | |
2361 | ||
2362 | snd_pcm_stream_lock_irq(substream); | |
2363 | switch (runtime->status->state) { | |
2364 | case SNDRV_PCM_STATE_DRAINING: | |
2365 | if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) | |
2366 | goto __badfd; | |
2367 | case SNDRV_PCM_STATE_RUNNING: | |
2368 | if ((err = snd_pcm_update_hw_ptr(substream)) < 0) | |
2369 | break; | |
2370 | /* Fall through */ | |
2371 | case SNDRV_PCM_STATE_PREPARED: | |
2372 | case SNDRV_PCM_STATE_SUSPENDED: | |
2373 | err = 0; | |
2374 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) | |
2375 | n = snd_pcm_playback_hw_avail(runtime); | |
2376 | else | |
2377 | n = snd_pcm_capture_avail(runtime); | |
2378 | break; | |
2379 | case SNDRV_PCM_STATE_XRUN: | |
2380 | err = -EPIPE; | |
2381 | break; | |
2382 | default: | |
2383 | __badfd: | |
2384 | err = -EBADFD; | |
2385 | break; | |
2386 | } | |
2387 | snd_pcm_stream_unlock_irq(substream); | |
2388 | if (!err) | |
2389 | if (put_user(n, res)) | |
2390 | err = -EFAULT; | |
2391 | return err; | |
2392 | } | |
2393 | ||
2394 | static int snd_pcm_sync_ptr(snd_pcm_substream_t *substream, struct sndrv_pcm_sync_ptr __user *_sync_ptr) | |
2395 | { | |
2396 | snd_pcm_runtime_t *runtime = substream->runtime; | |
2397 | struct sndrv_pcm_sync_ptr sync_ptr; | |
2398 | volatile struct sndrv_pcm_mmap_status *status; | |
2399 | volatile struct sndrv_pcm_mmap_control *control; | |
2400 | int err; | |
2401 | ||
2402 | memset(&sync_ptr, 0, sizeof(sync_ptr)); | |
2403 | if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags))) | |
2404 | return -EFAULT; | |
2405 | if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct sndrv_pcm_mmap_control))) | |
2406 | return -EFAULT; | |
2407 | status = runtime->status; | |
2408 | control = runtime->control; | |
2409 | if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) { | |
2410 | err = snd_pcm_hwsync(substream); | |
2411 | if (err < 0) | |
2412 | return err; | |
2413 | } | |
2414 | snd_pcm_stream_lock_irq(substream); | |
2415 | if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL)) | |
2416 | control->appl_ptr = sync_ptr.c.control.appl_ptr; | |
2417 | else | |
2418 | sync_ptr.c.control.appl_ptr = control->appl_ptr; | |
2419 | if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN)) | |
2420 | control->avail_min = sync_ptr.c.control.avail_min; | |
2421 | else | |
2422 | sync_ptr.c.control.avail_min = control->avail_min; | |
2423 | sync_ptr.s.status.state = status->state; | |
2424 | sync_ptr.s.status.hw_ptr = status->hw_ptr; | |
2425 | sync_ptr.s.status.tstamp = status->tstamp; | |
2426 | sync_ptr.s.status.suspended_state = status->suspended_state; | |
2427 | snd_pcm_stream_unlock_irq(substream); | |
2428 | if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr))) | |
2429 | return -EFAULT; | |
2430 | return 0; | |
2431 | } | |
2432 | ||
2433 | static int snd_pcm_playback_ioctl1(snd_pcm_substream_t *substream, | |
2434 | unsigned int cmd, void __user *arg); | |
2435 | static int snd_pcm_capture_ioctl1(snd_pcm_substream_t *substream, | |
2436 | unsigned int cmd, void __user *arg); | |
2437 | ||
2438 | static int snd_pcm_common_ioctl1(snd_pcm_substream_t *substream, | |
2439 | unsigned int cmd, void __user *arg) | |
2440 | { | |
2441 | snd_assert(substream != NULL, return -ENXIO); | |
2442 | ||
2443 | switch (cmd) { | |
2444 | case SNDRV_PCM_IOCTL_PVERSION: | |
2445 | return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0; | |
2446 | case SNDRV_PCM_IOCTL_INFO: | |
2447 | return snd_pcm_info_user(substream, arg); | |
07799e75 | 2448 | case SNDRV_PCM_IOCTL_TSTAMP: /* just for compatibility */ |
1da177e4 | 2449 | return 0; |
1da177e4 LT |
2450 | case SNDRV_PCM_IOCTL_HW_REFINE: |
2451 | return snd_pcm_hw_refine_user(substream, arg); | |
2452 | case SNDRV_PCM_IOCTL_HW_PARAMS: | |
2453 | return snd_pcm_hw_params_user(substream, arg); | |
2454 | case SNDRV_PCM_IOCTL_HW_FREE: | |
2455 | return snd_pcm_hw_free(substream); | |
2456 | case SNDRV_PCM_IOCTL_SW_PARAMS: | |
2457 | return snd_pcm_sw_params_user(substream, arg); | |
2458 | case SNDRV_PCM_IOCTL_STATUS: | |
2459 | return snd_pcm_status_user(substream, arg); | |
2460 | case SNDRV_PCM_IOCTL_CHANNEL_INFO: | |
2461 | return snd_pcm_channel_info_user(substream, arg); | |
2462 | case SNDRV_PCM_IOCTL_PREPARE: | |
2463 | return snd_pcm_prepare(substream); | |
2464 | case SNDRV_PCM_IOCTL_RESET: | |
2465 | return snd_pcm_reset(substream); | |
2466 | case SNDRV_PCM_IOCTL_START: | |
2467 | return snd_pcm_action_lock_irq(&snd_pcm_action_start, substream, SNDRV_PCM_STATE_RUNNING); | |
2468 | case SNDRV_PCM_IOCTL_LINK: | |
2469 | return snd_pcm_link(substream, (int)(unsigned long) arg); | |
2470 | case SNDRV_PCM_IOCTL_UNLINK: | |
2471 | return snd_pcm_unlink(substream); | |
2472 | case SNDRV_PCM_IOCTL_RESUME: | |
2473 | return snd_pcm_resume(substream); | |
2474 | case SNDRV_PCM_IOCTL_XRUN: | |
2475 | return snd_pcm_xrun(substream); | |
2476 | case SNDRV_PCM_IOCTL_HWSYNC: | |
2477 | return snd_pcm_hwsync(substream); | |
2478 | case SNDRV_PCM_IOCTL_DELAY: | |
2479 | return snd_pcm_delay(substream, arg); | |
2480 | case SNDRV_PCM_IOCTL_SYNC_PTR: | |
2481 | return snd_pcm_sync_ptr(substream, arg); | |
2482 | case SNDRV_PCM_IOCTL_HW_REFINE_OLD: | |
2483 | return snd_pcm_hw_refine_old_user(substream, arg); | |
2484 | case SNDRV_PCM_IOCTL_HW_PARAMS_OLD: | |
2485 | return snd_pcm_hw_params_old_user(substream, arg); | |
2486 | case SNDRV_PCM_IOCTL_DRAIN: | |
2487 | return snd_pcm_drain(substream); | |
2488 | case SNDRV_PCM_IOCTL_DROP: | |
2489 | return snd_pcm_drop(substream); | |
2490 | } | |
2491 | snd_printd("unknown ioctl = 0x%x\n", cmd); | |
2492 | return -ENOTTY; | |
2493 | } | |
2494 | ||
2495 | static int snd_pcm_playback_ioctl1(snd_pcm_substream_t *substream, | |
2496 | unsigned int cmd, void __user *arg) | |
2497 | { | |
2498 | snd_assert(substream != NULL, return -ENXIO); | |
2499 | snd_assert(substream->stream == SNDRV_PCM_STREAM_PLAYBACK, return -EINVAL); | |
2500 | switch (cmd) { | |
2501 | case SNDRV_PCM_IOCTL_WRITEI_FRAMES: | |
2502 | { | |
2503 | snd_xferi_t xferi; | |
2504 | snd_xferi_t __user *_xferi = arg; | |
2505 | snd_pcm_runtime_t *runtime = substream->runtime; | |
2506 | snd_pcm_sframes_t result; | |
2507 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) | |
2508 | return -EBADFD; | |
2509 | if (put_user(0, &_xferi->result)) | |
2510 | return -EFAULT; | |
2511 | if (copy_from_user(&xferi, _xferi, sizeof(xferi))) | |
2512 | return -EFAULT; | |
2513 | result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames); | |
2514 | __put_user(result, &_xferi->result); | |
2515 | return result < 0 ? result : 0; | |
2516 | } | |
2517 | case SNDRV_PCM_IOCTL_WRITEN_FRAMES: | |
2518 | { | |
2519 | snd_xfern_t xfern; | |
2520 | snd_xfern_t __user *_xfern = arg; | |
2521 | snd_pcm_runtime_t *runtime = substream->runtime; | |
2522 | void __user **bufs; | |
2523 | snd_pcm_sframes_t result; | |
2524 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) | |
2525 | return -EBADFD; | |
2526 | if (runtime->channels > 128) | |
2527 | return -EINVAL; | |
2528 | if (put_user(0, &_xfern->result)) | |
2529 | return -EFAULT; | |
2530 | if (copy_from_user(&xfern, _xfern, sizeof(xfern))) | |
2531 | return -EFAULT; | |
2532 | bufs = kmalloc(sizeof(void *) * runtime->channels, GFP_KERNEL); | |
2533 | if (bufs == NULL) | |
2534 | return -ENOMEM; | |
2535 | if (copy_from_user(bufs, xfern.bufs, sizeof(void *) * runtime->channels)) { | |
2536 | kfree(bufs); | |
2537 | return -EFAULT; | |
2538 | } | |
2539 | result = snd_pcm_lib_writev(substream, bufs, xfern.frames); | |
2540 | kfree(bufs); | |
2541 | __put_user(result, &_xfern->result); | |
2542 | return result < 0 ? result : 0; | |
2543 | } | |
2544 | case SNDRV_PCM_IOCTL_REWIND: | |
2545 | { | |
2546 | snd_pcm_uframes_t frames; | |
2547 | snd_pcm_uframes_t __user *_frames = arg; | |
2548 | snd_pcm_sframes_t result; | |
2549 | if (get_user(frames, _frames)) | |
2550 | return -EFAULT; | |
2551 | if (put_user(0, _frames)) | |
2552 | return -EFAULT; | |
2553 | result = snd_pcm_playback_rewind(substream, frames); | |
2554 | __put_user(result, _frames); | |
2555 | return result < 0 ? result : 0; | |
2556 | } | |
2557 | case SNDRV_PCM_IOCTL_FORWARD: | |
2558 | { | |
2559 | snd_pcm_uframes_t frames; | |
2560 | snd_pcm_uframes_t __user *_frames = arg; | |
2561 | snd_pcm_sframes_t result; | |
2562 | if (get_user(frames, _frames)) | |
2563 | return -EFAULT; | |
2564 | if (put_user(0, _frames)) | |
2565 | return -EFAULT; | |
2566 | result = snd_pcm_playback_forward(substream, frames); | |
2567 | __put_user(result, _frames); | |
2568 | return result < 0 ? result : 0; | |
2569 | } | |
2570 | case SNDRV_PCM_IOCTL_PAUSE: | |
2571 | { | |
2572 | int res; | |
2573 | snd_pcm_stream_lock_irq(substream); | |
2574 | res = snd_pcm_pause(substream, (int)(unsigned long)arg); | |
2575 | snd_pcm_stream_unlock_irq(substream); | |
2576 | return res; | |
2577 | } | |
2578 | } | |
2579 | return snd_pcm_common_ioctl1(substream, cmd, arg); | |
2580 | } | |
2581 | ||
2582 | static int snd_pcm_capture_ioctl1(snd_pcm_substream_t *substream, | |
2583 | unsigned int cmd, void __user *arg) | |
2584 | { | |
2585 | snd_assert(substream != NULL, return -ENXIO); | |
2586 | snd_assert(substream->stream == SNDRV_PCM_STREAM_CAPTURE, return -EINVAL); | |
2587 | switch (cmd) { | |
2588 | case SNDRV_PCM_IOCTL_READI_FRAMES: | |
2589 | { | |
2590 | snd_xferi_t xferi; | |
2591 | snd_xferi_t __user *_xferi = arg; | |
2592 | snd_pcm_runtime_t *runtime = substream->runtime; | |
2593 | snd_pcm_sframes_t result; | |
2594 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) | |
2595 | return -EBADFD; | |
2596 | if (put_user(0, &_xferi->result)) | |
2597 | return -EFAULT; | |
2598 | if (copy_from_user(&xferi, _xferi, sizeof(xferi))) | |
2599 | return -EFAULT; | |
2600 | result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames); | |
2601 | __put_user(result, &_xferi->result); | |
2602 | return result < 0 ? result : 0; | |
2603 | } | |
2604 | case SNDRV_PCM_IOCTL_READN_FRAMES: | |
2605 | { | |
2606 | snd_xfern_t xfern; | |
2607 | snd_xfern_t __user *_xfern = arg; | |
2608 | snd_pcm_runtime_t *runtime = substream->runtime; | |
2609 | void *bufs; | |
2610 | snd_pcm_sframes_t result; | |
2611 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) | |
2612 | return -EBADFD; | |
2613 | if (runtime->channels > 128) | |
2614 | return -EINVAL; | |
2615 | if (put_user(0, &_xfern->result)) | |
2616 | return -EFAULT; | |
2617 | if (copy_from_user(&xfern, _xfern, sizeof(xfern))) | |
2618 | return -EFAULT; | |
2619 | bufs = kmalloc(sizeof(void *) * runtime->channels, GFP_KERNEL); | |
2620 | if (bufs == NULL) | |
2621 | return -ENOMEM; | |
2622 | if (copy_from_user(bufs, xfern.bufs, sizeof(void *) * runtime->channels)) { | |
2623 | kfree(bufs); | |
2624 | return -EFAULT; | |
2625 | } | |
2626 | result = snd_pcm_lib_readv(substream, bufs, xfern.frames); | |
2627 | kfree(bufs); | |
2628 | __put_user(result, &_xfern->result); | |
2629 | return result < 0 ? result : 0; | |
2630 | } | |
2631 | case SNDRV_PCM_IOCTL_REWIND: | |
2632 | { | |
2633 | snd_pcm_uframes_t frames; | |
2634 | snd_pcm_uframes_t __user *_frames = arg; | |
2635 | snd_pcm_sframes_t result; | |
2636 | if (get_user(frames, _frames)) | |
2637 | return -EFAULT; | |
2638 | if (put_user(0, _frames)) | |
2639 | return -EFAULT; | |
2640 | result = snd_pcm_capture_rewind(substream, frames); | |
2641 | __put_user(result, _frames); | |
2642 | return result < 0 ? result : 0; | |
2643 | } | |
2644 | case SNDRV_PCM_IOCTL_FORWARD: | |
2645 | { | |
2646 | snd_pcm_uframes_t frames; | |
2647 | snd_pcm_uframes_t __user *_frames = arg; | |
2648 | snd_pcm_sframes_t result; | |
2649 | if (get_user(frames, _frames)) | |
2650 | return -EFAULT; | |
2651 | if (put_user(0, _frames)) | |
2652 | return -EFAULT; | |
2653 | result = snd_pcm_capture_forward(substream, frames); | |
2654 | __put_user(result, _frames); | |
2655 | return result < 0 ? result : 0; | |
2656 | } | |
2657 | } | |
2658 | return snd_pcm_common_ioctl1(substream, cmd, arg); | |
2659 | } | |
2660 | ||
2661 | static long snd_pcm_playback_ioctl(struct file *file, unsigned int cmd, unsigned long arg) | |
2662 | { | |
2663 | snd_pcm_file_t *pcm_file; | |
2664 | ||
2665 | pcm_file = file->private_data; | |
2666 | ||
2667 | if (((cmd >> 8) & 0xff) != 'A') | |
2668 | return -ENOTTY; | |
2669 | ||
2670 | return snd_pcm_playback_ioctl1(pcm_file->substream, cmd, (void __user *)arg); | |
2671 | } | |
2672 | ||
2673 | static long snd_pcm_capture_ioctl(struct file *file, unsigned int cmd, unsigned long arg) | |
2674 | { | |
2675 | snd_pcm_file_t *pcm_file; | |
2676 | ||
2677 | pcm_file = file->private_data; | |
2678 | ||
2679 | if (((cmd >> 8) & 0xff) != 'A') | |
2680 | return -ENOTTY; | |
2681 | ||
2682 | return snd_pcm_capture_ioctl1(pcm_file->substream, cmd, (void __user *)arg); | |
2683 | } | |
2684 | ||
2685 | int snd_pcm_kernel_playback_ioctl(snd_pcm_substream_t *substream, | |
2686 | unsigned int cmd, void *arg) | |
2687 | { | |
2688 | mm_segment_t fs; | |
2689 | int result; | |
2690 | ||
2691 | fs = snd_enter_user(); | |
2692 | result = snd_pcm_playback_ioctl1(substream, cmd, (void __user *)arg); | |
2693 | snd_leave_user(fs); | |
2694 | return result; | |
2695 | } | |
2696 | ||
2697 | int snd_pcm_kernel_capture_ioctl(snd_pcm_substream_t *substream, | |
2698 | unsigned int cmd, void *arg) | |
2699 | { | |
2700 | mm_segment_t fs; | |
2701 | int result; | |
2702 | ||
2703 | fs = snd_enter_user(); | |
2704 | result = snd_pcm_capture_ioctl1(substream, cmd, (void __user *)arg); | |
2705 | snd_leave_user(fs); | |
2706 | return result; | |
2707 | } | |
2708 | ||
2709 | int snd_pcm_kernel_ioctl(snd_pcm_substream_t *substream, | |
2710 | unsigned int cmd, void *arg) | |
2711 | { | |
2712 | switch (substream->stream) { | |
2713 | case SNDRV_PCM_STREAM_PLAYBACK: | |
2714 | return snd_pcm_kernel_playback_ioctl(substream, cmd, arg); | |
2715 | case SNDRV_PCM_STREAM_CAPTURE: | |
2716 | return snd_pcm_kernel_capture_ioctl(substream, cmd, arg); | |
2717 | default: | |
2718 | return -EINVAL; | |
2719 | } | |
2720 | } | |
2721 | ||
2722 | static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count, loff_t * offset) | |
2723 | { | |
2724 | snd_pcm_file_t *pcm_file; | |
2725 | snd_pcm_substream_t *substream; | |
2726 | snd_pcm_runtime_t *runtime; | |
2727 | snd_pcm_sframes_t result; | |
2728 | ||
2729 | pcm_file = file->private_data; | |
2730 | substream = pcm_file->substream; | |
2731 | snd_assert(substream != NULL, return -ENXIO); | |
2732 | runtime = substream->runtime; | |
2733 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) | |
2734 | return -EBADFD; | |
2735 | if (!frame_aligned(runtime, count)) | |
2736 | return -EINVAL; | |
2737 | count = bytes_to_frames(runtime, count); | |
2738 | result = snd_pcm_lib_read(substream, buf, count); | |
2739 | if (result > 0) | |
2740 | result = frames_to_bytes(runtime, result); | |
2741 | return result; | |
2742 | } | |
2743 | ||
2744 | static ssize_t snd_pcm_write(struct file *file, const char __user *buf, size_t count, loff_t * offset) | |
2745 | { | |
2746 | snd_pcm_file_t *pcm_file; | |
2747 | snd_pcm_substream_t *substream; | |
2748 | snd_pcm_runtime_t *runtime; | |
2749 | snd_pcm_sframes_t result; | |
2750 | ||
2751 | pcm_file = file->private_data; | |
2752 | substream = pcm_file->substream; | |
2753 | snd_assert(substream != NULL, result = -ENXIO; goto end); | |
2754 | runtime = substream->runtime; | |
2755 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { | |
2756 | result = -EBADFD; | |
2757 | goto end; | |
2758 | } | |
2759 | if (!frame_aligned(runtime, count)) { | |
2760 | result = -EINVAL; | |
2761 | goto end; | |
2762 | } | |
2763 | count = bytes_to_frames(runtime, count); | |
2764 | result = snd_pcm_lib_write(substream, buf, count); | |
2765 | if (result > 0) | |
2766 | result = frames_to_bytes(runtime, result); | |
2767 | end: | |
2768 | return result; | |
2769 | } | |
2770 | ||
2771 | static ssize_t snd_pcm_readv(struct file *file, const struct iovec *_vector, | |
2772 | unsigned long count, loff_t * offset) | |
2773 | ||
2774 | { | |
2775 | snd_pcm_file_t *pcm_file; | |
2776 | snd_pcm_substream_t *substream; | |
2777 | snd_pcm_runtime_t *runtime; | |
2778 | snd_pcm_sframes_t result; | |
2779 | unsigned long i; | |
2780 | void __user **bufs; | |
2781 | snd_pcm_uframes_t frames; | |
2782 | ||
2783 | pcm_file = file->private_data; | |
2784 | substream = pcm_file->substream; | |
2785 | snd_assert(substream != NULL, return -ENXIO); | |
2786 | runtime = substream->runtime; | |
2787 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) | |
2788 | return -EBADFD; | |
2789 | if (count > 1024 || count != runtime->channels) | |
2790 | return -EINVAL; | |
2791 | if (!frame_aligned(runtime, _vector->iov_len)) | |
2792 | return -EINVAL; | |
2793 | frames = bytes_to_samples(runtime, _vector->iov_len); | |
2794 | bufs = kmalloc(sizeof(void *) * count, GFP_KERNEL); | |
2795 | if (bufs == NULL) | |
2796 | return -ENOMEM; | |
2797 | for (i = 0; i < count; ++i) | |
2798 | bufs[i] = _vector[i].iov_base; | |
2799 | result = snd_pcm_lib_readv(substream, bufs, frames); | |
2800 | if (result > 0) | |
2801 | result = frames_to_bytes(runtime, result); | |
2802 | kfree(bufs); | |
2803 | return result; | |
2804 | } | |
2805 | ||
2806 | static ssize_t snd_pcm_writev(struct file *file, const struct iovec *_vector, | |
2807 | unsigned long count, loff_t * offset) | |
2808 | { | |
2809 | snd_pcm_file_t *pcm_file; | |
2810 | snd_pcm_substream_t *substream; | |
2811 | snd_pcm_runtime_t *runtime; | |
2812 | snd_pcm_sframes_t result; | |
2813 | unsigned long i; | |
2814 | void __user **bufs; | |
2815 | snd_pcm_uframes_t frames; | |
2816 | ||
2817 | pcm_file = file->private_data; | |
2818 | substream = pcm_file->substream; | |
2819 | snd_assert(substream != NULL, result = -ENXIO; goto end); | |
2820 | runtime = substream->runtime; | |
2821 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { | |
2822 | result = -EBADFD; | |
2823 | goto end; | |
2824 | } | |
2825 | if (count > 128 || count != runtime->channels || | |
2826 | !frame_aligned(runtime, _vector->iov_len)) { | |
2827 | result = -EINVAL; | |
2828 | goto end; | |
2829 | } | |
2830 | frames = bytes_to_samples(runtime, _vector->iov_len); | |
2831 | bufs = kmalloc(sizeof(void *) * count, GFP_KERNEL); | |
2832 | if (bufs == NULL) | |
2833 | return -ENOMEM; | |
2834 | for (i = 0; i < count; ++i) | |
2835 | bufs[i] = _vector[i].iov_base; | |
2836 | result = snd_pcm_lib_writev(substream, bufs, frames); | |
2837 | if (result > 0) | |
2838 | result = frames_to_bytes(runtime, result); | |
2839 | kfree(bufs); | |
2840 | end: | |
2841 | return result; | |
2842 | } | |
2843 | ||
2844 | static unsigned int snd_pcm_playback_poll(struct file *file, poll_table * wait) | |
2845 | { | |
2846 | snd_pcm_file_t *pcm_file; | |
2847 | snd_pcm_substream_t *substream; | |
2848 | snd_pcm_runtime_t *runtime; | |
2849 | unsigned int mask; | |
2850 | snd_pcm_uframes_t avail; | |
2851 | ||
2852 | pcm_file = file->private_data; | |
2853 | ||
2854 | substream = pcm_file->substream; | |
2855 | snd_assert(substream != NULL, return -ENXIO); | |
2856 | runtime = substream->runtime; | |
2857 | ||
2858 | poll_wait(file, &runtime->sleep, wait); | |
2859 | ||
2860 | snd_pcm_stream_lock_irq(substream); | |
2861 | avail = snd_pcm_playback_avail(runtime); | |
2862 | switch (runtime->status->state) { | |
2863 | case SNDRV_PCM_STATE_RUNNING: | |
2864 | case SNDRV_PCM_STATE_PREPARED: | |
2865 | case SNDRV_PCM_STATE_PAUSED: | |
2866 | if (avail >= runtime->control->avail_min) { | |
2867 | mask = POLLOUT | POLLWRNORM; | |
2868 | break; | |
2869 | } | |
2870 | /* Fall through */ | |
2871 | case SNDRV_PCM_STATE_DRAINING: | |
2872 | mask = 0; | |
2873 | break; | |
2874 | default: | |
2875 | mask = POLLOUT | POLLWRNORM | POLLERR; | |
2876 | break; | |
2877 | } | |
2878 | snd_pcm_stream_unlock_irq(substream); | |
2879 | return mask; | |
2880 | } | |
2881 | ||
2882 | static unsigned int snd_pcm_capture_poll(struct file *file, poll_table * wait) | |
2883 | { | |
2884 | snd_pcm_file_t *pcm_file; | |
2885 | snd_pcm_substream_t *substream; | |
2886 | snd_pcm_runtime_t *runtime; | |
2887 | unsigned int mask; | |
2888 | snd_pcm_uframes_t avail; | |
2889 | ||
2890 | pcm_file = file->private_data; | |
2891 | ||
2892 | substream = pcm_file->substream; | |
2893 | snd_assert(substream != NULL, return -ENXIO); | |
2894 | runtime = substream->runtime; | |
2895 | ||
2896 | poll_wait(file, &runtime->sleep, wait); | |
2897 | ||
2898 | snd_pcm_stream_lock_irq(substream); | |
2899 | avail = snd_pcm_capture_avail(runtime); | |
2900 | switch (runtime->status->state) { | |
2901 | case SNDRV_PCM_STATE_RUNNING: | |
2902 | case SNDRV_PCM_STATE_PREPARED: | |
2903 | case SNDRV_PCM_STATE_PAUSED: | |
2904 | if (avail >= runtime->control->avail_min) { | |
2905 | mask = POLLIN | POLLRDNORM; | |
2906 | break; | |
2907 | } | |
2908 | mask = 0; | |
2909 | break; | |
2910 | case SNDRV_PCM_STATE_DRAINING: | |
2911 | if (avail > 0) { | |
2912 | mask = POLLIN | POLLRDNORM; | |
2913 | break; | |
2914 | } | |
2915 | /* Fall through */ | |
2916 | default: | |
2917 | mask = POLLIN | POLLRDNORM | POLLERR; | |
2918 | break; | |
2919 | } | |
2920 | snd_pcm_stream_unlock_irq(substream); | |
2921 | return mask; | |
2922 | } | |
2923 | ||
2924 | /* | |
2925 | * mmap support | |
2926 | */ | |
2927 | ||
2928 | /* | |
2929 | * Only on coherent architectures, we can mmap the status and the control records | |
2930 | * for effcient data transfer. On others, we have to use HWSYNC ioctl... | |
2931 | */ | |
2932 | #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA) | |
2933 | /* | |
2934 | * mmap status record | |
2935 | */ | |
2936 | static struct page * snd_pcm_mmap_status_nopage(struct vm_area_struct *area, unsigned long address, int *type) | |
2937 | { | |
2938 | snd_pcm_substream_t *substream = (snd_pcm_substream_t *)area->vm_private_data; | |
2939 | snd_pcm_runtime_t *runtime; | |
2940 | struct page * page; | |
2941 | ||
2942 | if (substream == NULL) | |
2943 | return NOPAGE_OOM; | |
2944 | runtime = substream->runtime; | |
2945 | page = virt_to_page(runtime->status); | |
b5810039 | 2946 | get_page(page); |
1da177e4 LT |
2947 | if (type) |
2948 | *type = VM_FAULT_MINOR; | |
2949 | return page; | |
2950 | } | |
2951 | ||
2952 | static struct vm_operations_struct snd_pcm_vm_ops_status = | |
2953 | { | |
2954 | .nopage = snd_pcm_mmap_status_nopage, | |
2955 | }; | |
2956 | ||
2957 | static int snd_pcm_mmap_status(snd_pcm_substream_t *substream, struct file *file, | |
2958 | struct vm_area_struct *area) | |
2959 | { | |
2960 | snd_pcm_runtime_t *runtime; | |
2961 | long size; | |
2962 | if (!(area->vm_flags & VM_READ)) | |
2963 | return -EINVAL; | |
2964 | runtime = substream->runtime; | |
2965 | snd_assert(runtime != NULL, return -EAGAIN); | |
2966 | size = area->vm_end - area->vm_start; | |
2967 | if (size != PAGE_ALIGN(sizeof(snd_pcm_mmap_status_t))) | |
2968 | return -EINVAL; | |
2969 | area->vm_ops = &snd_pcm_vm_ops_status; | |
2970 | area->vm_private_data = substream; | |
2971 | area->vm_flags |= VM_RESERVED; | |
2972 | return 0; | |
2973 | } | |
2974 | ||
2975 | /* | |
2976 | * mmap control record | |
2977 | */ | |
2978 | static struct page * snd_pcm_mmap_control_nopage(struct vm_area_struct *area, unsigned long address, int *type) | |
2979 | { | |
2980 | snd_pcm_substream_t *substream = (snd_pcm_substream_t *)area->vm_private_data; | |
2981 | snd_pcm_runtime_t *runtime; | |
2982 | struct page * page; | |
2983 | ||
2984 | if (substream == NULL) | |
2985 | return NOPAGE_OOM; | |
2986 | runtime = substream->runtime; | |
2987 | page = virt_to_page(runtime->control); | |
b5810039 | 2988 | get_page(page); |
1da177e4 LT |
2989 | if (type) |
2990 | *type = VM_FAULT_MINOR; | |
2991 | return page; | |
2992 | } | |
2993 | ||
2994 | static struct vm_operations_struct snd_pcm_vm_ops_control = | |
2995 | { | |
2996 | .nopage = snd_pcm_mmap_control_nopage, | |
2997 | }; | |
2998 | ||
2999 | static int snd_pcm_mmap_control(snd_pcm_substream_t *substream, struct file *file, | |
3000 | struct vm_area_struct *area) | |
3001 | { | |
3002 | snd_pcm_runtime_t *runtime; | |
3003 | long size; | |
3004 | if (!(area->vm_flags & VM_READ)) | |
3005 | return -EINVAL; | |
3006 | runtime = substream->runtime; | |
3007 | snd_assert(runtime != NULL, return -EAGAIN); | |
3008 | size = area->vm_end - area->vm_start; | |
3009 | if (size != PAGE_ALIGN(sizeof(snd_pcm_mmap_control_t))) | |
3010 | return -EINVAL; | |
3011 | area->vm_ops = &snd_pcm_vm_ops_control; | |
3012 | area->vm_private_data = substream; | |
3013 | area->vm_flags |= VM_RESERVED; | |
3014 | return 0; | |
3015 | } | |
3016 | #else /* ! coherent mmap */ | |
3017 | /* | |
3018 | * don't support mmap for status and control records. | |
3019 | */ | |
3020 | static int snd_pcm_mmap_status(snd_pcm_substream_t *substream, struct file *file, | |
3021 | struct vm_area_struct *area) | |
3022 | { | |
3023 | return -ENXIO; | |
3024 | } | |
3025 | static int snd_pcm_mmap_control(snd_pcm_substream_t *substream, struct file *file, | |
3026 | struct vm_area_struct *area) | |
3027 | { | |
3028 | return -ENXIO; | |
3029 | } | |
3030 | #endif /* coherent mmap */ | |
3031 | ||
3032 | /* | |
3033 | * nopage callback for mmapping a RAM page | |
3034 | */ | |
3035 | static struct page *snd_pcm_mmap_data_nopage(struct vm_area_struct *area, unsigned long address, int *type) | |
3036 | { | |
3037 | snd_pcm_substream_t *substream = (snd_pcm_substream_t *)area->vm_private_data; | |
3038 | snd_pcm_runtime_t *runtime; | |
3039 | unsigned long offset; | |
3040 | struct page * page; | |
3041 | void *vaddr; | |
3042 | size_t dma_bytes; | |
3043 | ||
3044 | if (substream == NULL) | |
3045 | return NOPAGE_OOM; | |
3046 | runtime = substream->runtime; | |
3047 | offset = area->vm_pgoff << PAGE_SHIFT; | |
3048 | offset += address - area->vm_start; | |
3049 | snd_assert((offset % PAGE_SIZE) == 0, return NOPAGE_OOM); | |
3050 | dma_bytes = PAGE_ALIGN(runtime->dma_bytes); | |
3051 | if (offset > dma_bytes - PAGE_SIZE) | |
3052 | return NOPAGE_SIGBUS; | |
3053 | if (substream->ops->page) { | |
3054 | page = substream->ops->page(substream, offset); | |
3055 | if (! page) | |
3056 | return NOPAGE_OOM; | |
3057 | } else { | |
3058 | vaddr = runtime->dma_area + offset; | |
3059 | page = virt_to_page(vaddr); | |
3060 | } | |
b5810039 | 3061 | get_page(page); |
1da177e4 LT |
3062 | if (type) |
3063 | *type = VM_FAULT_MINOR; | |
3064 | return page; | |
3065 | } | |
3066 | ||
3067 | static struct vm_operations_struct snd_pcm_vm_ops_data = | |
3068 | { | |
3069 | .open = snd_pcm_mmap_data_open, | |
3070 | .close = snd_pcm_mmap_data_close, | |
3071 | .nopage = snd_pcm_mmap_data_nopage, | |
3072 | }; | |
3073 | ||
3074 | /* | |
3075 | * mmap the DMA buffer on RAM | |
3076 | */ | |
3077 | static int snd_pcm_default_mmap(snd_pcm_substream_t *substream, struct vm_area_struct *area) | |
3078 | { | |
3079 | area->vm_ops = &snd_pcm_vm_ops_data; | |
3080 | area->vm_private_data = substream; | |
3081 | area->vm_flags |= VM_RESERVED; | |
3082 | atomic_inc(&substream->runtime->mmap_count); | |
3083 | return 0; | |
3084 | } | |
3085 | ||
3086 | /* | |
3087 | * mmap the DMA buffer on I/O memory area | |
3088 | */ | |
3089 | #if SNDRV_PCM_INFO_MMAP_IOMEM | |
3090 | static struct vm_operations_struct snd_pcm_vm_ops_data_mmio = | |
3091 | { | |
3092 | .open = snd_pcm_mmap_data_open, | |
3093 | .close = snd_pcm_mmap_data_close, | |
3094 | }; | |
3095 | ||
3096 | int snd_pcm_lib_mmap_iomem(snd_pcm_substream_t *substream, struct vm_area_struct *area) | |
3097 | { | |
3098 | long size; | |
3099 | unsigned long offset; | |
3100 | ||
3101 | #ifdef pgprot_noncached | |
3102 | area->vm_page_prot = pgprot_noncached(area->vm_page_prot); | |
3103 | #endif | |
3104 | area->vm_ops = &snd_pcm_vm_ops_data_mmio; | |
3105 | area->vm_private_data = substream; | |
3106 | area->vm_flags |= VM_IO; | |
3107 | size = area->vm_end - area->vm_start; | |
3108 | offset = area->vm_pgoff << PAGE_SHIFT; | |
3109 | if (io_remap_pfn_range(area, area->vm_start, | |
3110 | (substream->runtime->dma_addr + offset) >> PAGE_SHIFT, | |
3111 | size, area->vm_page_prot)) | |
3112 | return -EAGAIN; | |
3113 | atomic_inc(&substream->runtime->mmap_count); | |
3114 | return 0; | |
3115 | } | |
3116 | #endif /* SNDRV_PCM_INFO_MMAP */ | |
3117 | ||
3118 | /* | |
3119 | * mmap DMA buffer | |
3120 | */ | |
3121 | int snd_pcm_mmap_data(snd_pcm_substream_t *substream, struct file *file, | |
3122 | struct vm_area_struct *area) | |
3123 | { | |
3124 | snd_pcm_runtime_t *runtime; | |
3125 | long size; | |
3126 | unsigned long offset; | |
3127 | size_t dma_bytes; | |
3128 | ||
3129 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { | |
3130 | if (!(area->vm_flags & (VM_WRITE|VM_READ))) | |
3131 | return -EINVAL; | |
3132 | } else { | |
3133 | if (!(area->vm_flags & VM_READ)) | |
3134 | return -EINVAL; | |
3135 | } | |
3136 | runtime = substream->runtime; | |
3137 | snd_assert(runtime != NULL, return -EAGAIN); | |
3138 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) | |
3139 | return -EBADFD; | |
3140 | if (!(runtime->info & SNDRV_PCM_INFO_MMAP)) | |
3141 | return -ENXIO; | |
3142 | if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED || | |
3143 | runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) | |
3144 | return -EINVAL; | |
3145 | size = area->vm_end - area->vm_start; | |
3146 | offset = area->vm_pgoff << PAGE_SHIFT; | |
3147 | dma_bytes = PAGE_ALIGN(runtime->dma_bytes); | |
3148 | if ((size_t)size > dma_bytes) | |
3149 | return -EINVAL; | |
3150 | if (offset > dma_bytes - size) | |
3151 | return -EINVAL; | |
3152 | ||
3153 | if (substream->ops->mmap) | |
3154 | return substream->ops->mmap(substream, area); | |
3155 | else | |
3156 | return snd_pcm_default_mmap(substream, area); | |
3157 | } | |
3158 | ||
3159 | static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area) | |
3160 | { | |
3161 | snd_pcm_file_t * pcm_file; | |
3162 | snd_pcm_substream_t *substream; | |
3163 | unsigned long offset; | |
3164 | ||
3165 | pcm_file = file->private_data; | |
3166 | substream = pcm_file->substream; | |
3167 | snd_assert(substream != NULL, return -ENXIO); | |
3168 | ||
3169 | offset = area->vm_pgoff << PAGE_SHIFT; | |
3170 | switch (offset) { | |
3171 | case SNDRV_PCM_MMAP_OFFSET_STATUS: | |
3172 | if (substream->no_mmap_ctrl) | |
3173 | return -ENXIO; | |
3174 | return snd_pcm_mmap_status(substream, file, area); | |
3175 | case SNDRV_PCM_MMAP_OFFSET_CONTROL: | |
3176 | if (substream->no_mmap_ctrl) | |
3177 | return -ENXIO; | |
3178 | return snd_pcm_mmap_control(substream, file, area); | |
3179 | default: | |
3180 | return snd_pcm_mmap_data(substream, file, area); | |
3181 | } | |
3182 | return 0; | |
3183 | } | |
3184 | ||
3185 | static int snd_pcm_fasync(int fd, struct file * file, int on) | |
3186 | { | |
3187 | snd_pcm_file_t * pcm_file; | |
3188 | snd_pcm_substream_t *substream; | |
3189 | snd_pcm_runtime_t *runtime; | |
3190 | int err; | |
3191 | ||
3192 | pcm_file = file->private_data; | |
3193 | substream = pcm_file->substream; | |
3194 | snd_assert(substream != NULL, return -ENXIO); | |
3195 | runtime = substream->runtime; | |
3196 | ||
3197 | err = fasync_helper(fd, file, on, &runtime->fasync); | |
3198 | if (err < 0) | |
3199 | return err; | |
3200 | return 0; | |
3201 | } | |
3202 | ||
3203 | /* | |
3204 | * ioctl32 compat | |
3205 | */ | |
3206 | #ifdef CONFIG_COMPAT | |
3207 | #include "pcm_compat.c" | |
3208 | #else | |
3209 | #define snd_pcm_ioctl_compat NULL | |
3210 | #endif | |
3211 | ||
3212 | /* | |
3213 | * To be removed helpers to keep binary compatibility | |
3214 | */ | |
3215 | ||
3216 | #define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5)) | |
3217 | #define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5)) | |
3218 | ||
3219 | static void snd_pcm_hw_convert_from_old_params(snd_pcm_hw_params_t *params, struct sndrv_pcm_hw_params_old *oparams) | |
3220 | { | |
3221 | unsigned int i; | |
3222 | ||
3223 | memset(params, 0, sizeof(*params)); | |
3224 | params->flags = oparams->flags; | |
3225 | for (i = 0; i < ARRAY_SIZE(oparams->masks); i++) | |
3226 | params->masks[i].bits[0] = oparams->masks[i]; | |
3227 | memcpy(params->intervals, oparams->intervals, sizeof(oparams->intervals)); | |
3228 | params->rmask = __OLD_TO_NEW_MASK(oparams->rmask); | |
3229 | params->cmask = __OLD_TO_NEW_MASK(oparams->cmask); | |
3230 | params->info = oparams->info; | |
3231 | params->msbits = oparams->msbits; | |
3232 | params->rate_num = oparams->rate_num; | |
3233 | params->rate_den = oparams->rate_den; | |
3234 | params->fifo_size = oparams->fifo_size; | |
3235 | } | |
3236 | ||
3237 | static void snd_pcm_hw_convert_to_old_params(struct sndrv_pcm_hw_params_old *oparams, snd_pcm_hw_params_t *params) | |
3238 | { | |
3239 | unsigned int i; | |
3240 | ||
3241 | memset(oparams, 0, sizeof(*oparams)); | |
3242 | oparams->flags = params->flags; | |
3243 | for (i = 0; i < ARRAY_SIZE(oparams->masks); i++) | |
3244 | oparams->masks[i] = params->masks[i].bits[0]; | |
3245 | memcpy(oparams->intervals, params->intervals, sizeof(oparams->intervals)); | |
3246 | oparams->rmask = __NEW_TO_OLD_MASK(params->rmask); | |
3247 | oparams->cmask = __NEW_TO_OLD_MASK(params->cmask); | |
3248 | oparams->info = params->info; | |
3249 | oparams->msbits = params->msbits; | |
3250 | oparams->rate_num = params->rate_num; | |
3251 | oparams->rate_den = params->rate_den; | |
3252 | oparams->fifo_size = params->fifo_size; | |
3253 | } | |
3254 | ||
3255 | static int snd_pcm_hw_refine_old_user(snd_pcm_substream_t * substream, struct sndrv_pcm_hw_params_old __user * _oparams) | |
3256 | { | |
3257 | snd_pcm_hw_params_t *params; | |
3258 | struct sndrv_pcm_hw_params_old *oparams = NULL; | |
3259 | int err; | |
3260 | ||
3261 | params = kmalloc(sizeof(*params), GFP_KERNEL); | |
3262 | if (!params) { | |
3263 | err = -ENOMEM; | |
3264 | goto out; | |
3265 | } | |
3266 | oparams = kmalloc(sizeof(*oparams), GFP_KERNEL); | |
3267 | if (!oparams) { | |
3268 | err = -ENOMEM; | |
3269 | goto out; | |
3270 | } | |
3271 | ||
3272 | if (copy_from_user(oparams, _oparams, sizeof(*oparams))) { | |
3273 | err = -EFAULT; | |
3274 | goto out; | |
3275 | } | |
3276 | snd_pcm_hw_convert_from_old_params(params, oparams); | |
3277 | err = snd_pcm_hw_refine(substream, params); | |
3278 | snd_pcm_hw_convert_to_old_params(oparams, params); | |
3279 | if (copy_to_user(_oparams, oparams, sizeof(*oparams))) { | |
3280 | if (!err) | |
3281 | err = -EFAULT; | |
3282 | } | |
3283 | out: | |
3284 | kfree(params); | |
3285 | kfree(oparams); | |
3286 | return err; | |
3287 | } | |
3288 | ||
3289 | static int snd_pcm_hw_params_old_user(snd_pcm_substream_t * substream, struct sndrv_pcm_hw_params_old __user * _oparams) | |
3290 | { | |
3291 | snd_pcm_hw_params_t *params; | |
3292 | struct sndrv_pcm_hw_params_old *oparams = NULL; | |
3293 | int err; | |
3294 | ||
3295 | params = kmalloc(sizeof(*params), GFP_KERNEL); | |
3296 | if (!params) { | |
3297 | err = -ENOMEM; | |
3298 | goto out; | |
3299 | } | |
3300 | oparams = kmalloc(sizeof(*oparams), GFP_KERNEL); | |
3301 | if (!oparams) { | |
3302 | err = -ENOMEM; | |
3303 | goto out; | |
3304 | } | |
3305 | if (copy_from_user(oparams, _oparams, sizeof(*oparams))) { | |
3306 | err = -EFAULT; | |
3307 | goto out; | |
3308 | } | |
3309 | snd_pcm_hw_convert_from_old_params(params, oparams); | |
3310 | err = snd_pcm_hw_params(substream, params); | |
3311 | snd_pcm_hw_convert_to_old_params(oparams, params); | |
3312 | if (copy_to_user(_oparams, oparams, sizeof(*oparams))) { | |
3313 | if (!err) | |
3314 | err = -EFAULT; | |
3315 | } | |
3316 | out: | |
3317 | kfree(params); | |
3318 | kfree(oparams); | |
3319 | return err; | |
3320 | } | |
3321 | ||
3322 | /* | |
3323 | * Register section | |
3324 | */ | |
3325 | ||
3326 | static struct file_operations snd_pcm_f_ops_playback = { | |
3327 | .owner = THIS_MODULE, | |
3328 | .write = snd_pcm_write, | |
3329 | .writev = snd_pcm_writev, | |
3330 | .open = snd_pcm_open, | |
3331 | .release = snd_pcm_release, | |
3332 | .poll = snd_pcm_playback_poll, | |
3333 | .unlocked_ioctl = snd_pcm_playback_ioctl, | |
3334 | .compat_ioctl = snd_pcm_ioctl_compat, | |
3335 | .mmap = snd_pcm_mmap, | |
3336 | .fasync = snd_pcm_fasync, | |
3337 | }; | |
3338 | ||
3339 | static struct file_operations snd_pcm_f_ops_capture = { | |
3340 | .owner = THIS_MODULE, | |
3341 | .read = snd_pcm_read, | |
3342 | .readv = snd_pcm_readv, | |
3343 | .open = snd_pcm_open, | |
3344 | .release = snd_pcm_release, | |
3345 | .poll = snd_pcm_capture_poll, | |
3346 | .unlocked_ioctl = snd_pcm_capture_ioctl, | |
3347 | .compat_ioctl = snd_pcm_ioctl_compat, | |
3348 | .mmap = snd_pcm_mmap, | |
3349 | .fasync = snd_pcm_fasync, | |
3350 | }; | |
3351 | ||
3352 | snd_minor_t snd_pcm_reg[2] = | |
3353 | { | |
3354 | { | |
3355 | .comment = "digital audio playback", | |
3356 | .f_ops = &snd_pcm_f_ops_playback, | |
3357 | }, | |
3358 | { | |
3359 | .comment = "digital audio capture", | |
3360 | .f_ops = &snd_pcm_f_ops_capture, | |
3361 | } | |
3362 | }; |