Commit | Line | Data |
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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 | ||
877211f5 | 42 | struct snd_pcm_hw_params_old { |
1da177e4 LT |
43 | unsigned int flags; |
44 | unsigned int masks[SNDRV_PCM_HW_PARAM_SUBFORMAT - | |
45 | SNDRV_PCM_HW_PARAM_ACCESS + 1]; | |
877211f5 | 46 | struct snd_interval intervals[SNDRV_PCM_HW_PARAM_TICK_TIME - |
1da177e4 LT |
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; | |
877211f5 | 54 | snd_pcm_uframes_t fifo_size; |
1da177e4 LT |
55 | unsigned char reserved[64]; |
56 | }; | |
57 | ||
877211f5 TI |
58 | #define SNDRV_PCM_IOCTL_HW_REFINE_OLD _IOWR('A', 0x10, struct snd_pcm_hw_params_old) |
59 | #define SNDRV_PCM_IOCTL_HW_PARAMS_OLD _IOWR('A', 0x11, struct snd_pcm_hw_params_old) | |
1da177e4 | 60 | |
877211f5 TI |
61 | static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream, |
62 | struct snd_pcm_hw_params_old __user * _oparams); | |
63 | static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream, | |
64 | struct snd_pcm_hw_params_old __user * _oparams); | |
1da177e4 LT |
65 | |
66 | /* | |
67 | * | |
68 | */ | |
69 | ||
70 | DEFINE_RWLOCK(snd_pcm_link_rwlock); | |
71 | static DECLARE_RWSEM(snd_pcm_link_rwsem); | |
72 | ||
73 | ||
74 | static inline mm_segment_t snd_enter_user(void) | |
75 | { | |
76 | mm_segment_t fs = get_fs(); | |
77 | set_fs(get_ds()); | |
78 | return fs; | |
79 | } | |
80 | ||
81 | static inline void snd_leave_user(mm_segment_t fs) | |
82 | { | |
83 | set_fs(fs); | |
84 | } | |
85 | ||
86 | ||
87 | ||
877211f5 | 88 | int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info) |
1da177e4 | 89 | { |
877211f5 TI |
90 | struct snd_pcm_runtime *runtime; |
91 | struct snd_pcm *pcm = substream->pcm; | |
92 | struct snd_pcm_str *pstr = substream->pstr; | |
1da177e4 LT |
93 | |
94 | snd_assert(substream != NULL, return -ENXIO); | |
95 | memset(info, 0, sizeof(*info)); | |
96 | info->card = pcm->card->number; | |
97 | info->device = pcm->device; | |
98 | info->stream = substream->stream; | |
99 | info->subdevice = substream->number; | |
100 | strlcpy(info->id, pcm->id, sizeof(info->id)); | |
101 | strlcpy(info->name, pcm->name, sizeof(info->name)); | |
102 | info->dev_class = pcm->dev_class; | |
103 | info->dev_subclass = pcm->dev_subclass; | |
104 | info->subdevices_count = pstr->substream_count; | |
105 | info->subdevices_avail = pstr->substream_count - pstr->substream_opened; | |
106 | strlcpy(info->subname, substream->name, sizeof(info->subname)); | |
107 | runtime = substream->runtime; | |
108 | /* AB: FIXME!!! This is definitely nonsense */ | |
109 | if (runtime) { | |
110 | info->sync = runtime->sync; | |
111 | substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_INFO, info); | |
112 | } | |
113 | return 0; | |
114 | } | |
115 | ||
877211f5 TI |
116 | int snd_pcm_info_user(struct snd_pcm_substream *substream, |
117 | struct snd_pcm_info __user * _info) | |
1da177e4 | 118 | { |
877211f5 | 119 | struct snd_pcm_info *info; |
1da177e4 LT |
120 | int err; |
121 | ||
122 | info = kmalloc(sizeof(*info), GFP_KERNEL); | |
123 | if (! info) | |
124 | return -ENOMEM; | |
125 | err = snd_pcm_info(substream, info); | |
126 | if (err >= 0) { | |
127 | if (copy_to_user(_info, info, sizeof(*info))) | |
128 | err = -EFAULT; | |
129 | } | |
130 | kfree(info); | |
131 | return err; | |
132 | } | |
133 | ||
134 | #undef RULES_DEBUG | |
135 | ||
136 | #ifdef RULES_DEBUG | |
137 | #define HW_PARAM(v) [SNDRV_PCM_HW_PARAM_##v] = #v | |
138 | char *snd_pcm_hw_param_names[] = { | |
139 | HW_PARAM(ACCESS), | |
140 | HW_PARAM(FORMAT), | |
141 | HW_PARAM(SUBFORMAT), | |
142 | HW_PARAM(SAMPLE_BITS), | |
143 | HW_PARAM(FRAME_BITS), | |
144 | HW_PARAM(CHANNELS), | |
145 | HW_PARAM(RATE), | |
146 | HW_PARAM(PERIOD_TIME), | |
147 | HW_PARAM(PERIOD_SIZE), | |
148 | HW_PARAM(PERIOD_BYTES), | |
149 | HW_PARAM(PERIODS), | |
150 | HW_PARAM(BUFFER_TIME), | |
151 | HW_PARAM(BUFFER_SIZE), | |
152 | HW_PARAM(BUFFER_BYTES), | |
153 | HW_PARAM(TICK_TIME), | |
154 | }; | |
155 | #endif | |
156 | ||
877211f5 TI |
157 | int snd_pcm_hw_refine(struct snd_pcm_substream *substream, |
158 | struct snd_pcm_hw_params *params) | |
1da177e4 LT |
159 | { |
160 | unsigned int k; | |
877211f5 TI |
161 | struct snd_pcm_hardware *hw; |
162 | struct snd_interval *i = NULL; | |
163 | struct snd_mask *m = NULL; | |
164 | struct snd_pcm_hw_constraints *constrs = &substream->runtime->hw_constraints; | |
1da177e4 LT |
165 | unsigned int rstamps[constrs->rules_num]; |
166 | unsigned int vstamps[SNDRV_PCM_HW_PARAM_LAST_INTERVAL + 1]; | |
167 | unsigned int stamp = 2; | |
168 | int changed, again; | |
169 | ||
170 | params->info = 0; | |
171 | params->fifo_size = 0; | |
172 | if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_SAMPLE_BITS)) | |
173 | params->msbits = 0; | |
174 | if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_RATE)) { | |
175 | params->rate_num = 0; | |
176 | params->rate_den = 0; | |
177 | } | |
178 | ||
179 | for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) { | |
180 | m = hw_param_mask(params, k); | |
181 | if (snd_mask_empty(m)) | |
182 | return -EINVAL; | |
183 | if (!(params->rmask & (1 << k))) | |
184 | continue; | |
185 | #ifdef RULES_DEBUG | |
186 | printk("%s = ", snd_pcm_hw_param_names[k]); | |
187 | printk("%04x%04x%04x%04x -> ", m->bits[3], m->bits[2], m->bits[1], m->bits[0]); | |
188 | #endif | |
189 | changed = snd_mask_refine(m, constrs_mask(constrs, k)); | |
190 | #ifdef RULES_DEBUG | |
191 | printk("%04x%04x%04x%04x\n", m->bits[3], m->bits[2], m->bits[1], m->bits[0]); | |
192 | #endif | |
193 | if (changed) | |
194 | params->cmask |= 1 << k; | |
195 | if (changed < 0) | |
196 | return changed; | |
197 | } | |
198 | ||
199 | for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) { | |
200 | i = hw_param_interval(params, k); | |
201 | if (snd_interval_empty(i)) | |
202 | return -EINVAL; | |
203 | if (!(params->rmask & (1 << k))) | |
204 | continue; | |
205 | #ifdef RULES_DEBUG | |
206 | printk("%s = ", snd_pcm_hw_param_names[k]); | |
207 | if (i->empty) | |
208 | printk("empty"); | |
209 | else | |
210 | printk("%c%u %u%c", | |
211 | i->openmin ? '(' : '[', i->min, | |
212 | i->max, i->openmax ? ')' : ']'); | |
213 | printk(" -> "); | |
214 | #endif | |
215 | changed = snd_interval_refine(i, constrs_interval(constrs, k)); | |
216 | #ifdef RULES_DEBUG | |
217 | if (i->empty) | |
218 | printk("empty\n"); | |
219 | else | |
220 | printk("%c%u %u%c\n", | |
221 | i->openmin ? '(' : '[', i->min, | |
222 | i->max, i->openmax ? ')' : ']'); | |
223 | #endif | |
224 | if (changed) | |
225 | params->cmask |= 1 << k; | |
226 | if (changed < 0) | |
227 | return changed; | |
228 | } | |
229 | ||
230 | for (k = 0; k < constrs->rules_num; k++) | |
231 | rstamps[k] = 0; | |
232 | for (k = 0; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) | |
233 | vstamps[k] = (params->rmask & (1 << k)) ? 1 : 0; | |
234 | do { | |
235 | again = 0; | |
236 | for (k = 0; k < constrs->rules_num; k++) { | |
877211f5 | 237 | struct snd_pcm_hw_rule *r = &constrs->rules[k]; |
1da177e4 LT |
238 | unsigned int d; |
239 | int doit = 0; | |
240 | if (r->cond && !(r->cond & params->flags)) | |
241 | continue; | |
242 | for (d = 0; r->deps[d] >= 0; d++) { | |
243 | if (vstamps[r->deps[d]] > rstamps[k]) { | |
244 | doit = 1; | |
245 | break; | |
246 | } | |
247 | } | |
248 | if (!doit) | |
249 | continue; | |
250 | #ifdef RULES_DEBUG | |
251 | printk("Rule %d [%p]: ", k, r->func); | |
252 | if (r->var >= 0) { | |
253 | printk("%s = ", snd_pcm_hw_param_names[r->var]); | |
254 | if (hw_is_mask(r->var)) { | |
255 | m = hw_param_mask(params, r->var); | |
256 | printk("%x", *m->bits); | |
257 | } else { | |
258 | i = hw_param_interval(params, r->var); | |
259 | if (i->empty) | |
260 | printk("empty"); | |
261 | else | |
262 | printk("%c%u %u%c", | |
263 | i->openmin ? '(' : '[', i->min, | |
264 | i->max, i->openmax ? ')' : ']'); | |
265 | } | |
266 | } | |
267 | #endif | |
268 | changed = r->func(params, r); | |
269 | #ifdef RULES_DEBUG | |
270 | if (r->var >= 0) { | |
271 | printk(" -> "); | |
272 | if (hw_is_mask(r->var)) | |
273 | printk("%x", *m->bits); | |
274 | else { | |
275 | if (i->empty) | |
276 | printk("empty"); | |
277 | else | |
278 | printk("%c%u %u%c", | |
279 | i->openmin ? '(' : '[', i->min, | |
280 | i->max, i->openmax ? ')' : ']'); | |
281 | } | |
282 | } | |
283 | printk("\n"); | |
284 | #endif | |
285 | rstamps[k] = stamp; | |
286 | if (changed && r->var >= 0) { | |
287 | params->cmask |= (1 << r->var); | |
288 | vstamps[r->var] = stamp; | |
289 | again = 1; | |
290 | } | |
291 | if (changed < 0) | |
292 | return changed; | |
293 | stamp++; | |
294 | } | |
295 | } while (again); | |
296 | if (!params->msbits) { | |
297 | i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS); | |
298 | if (snd_interval_single(i)) | |
299 | params->msbits = snd_interval_value(i); | |
300 | } | |
301 | ||
302 | if (!params->rate_den) { | |
303 | i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE); | |
304 | if (snd_interval_single(i)) { | |
305 | params->rate_num = snd_interval_value(i); | |
306 | params->rate_den = 1; | |
307 | } | |
308 | } | |
309 | ||
310 | hw = &substream->runtime->hw; | |
311 | if (!params->info) | |
312 | params->info = hw->info; | |
313 | if (!params->fifo_size) | |
314 | params->fifo_size = hw->fifo_size; | |
315 | params->rmask = 0; | |
316 | return 0; | |
317 | } | |
318 | ||
877211f5 TI |
319 | static int snd_pcm_hw_refine_user(struct snd_pcm_substream *substream, |
320 | struct snd_pcm_hw_params __user * _params) | |
1da177e4 | 321 | { |
877211f5 | 322 | struct snd_pcm_hw_params *params; |
1da177e4 LT |
323 | int err; |
324 | ||
325 | params = kmalloc(sizeof(*params), GFP_KERNEL); | |
326 | if (!params) { | |
327 | err = -ENOMEM; | |
328 | goto out; | |
329 | } | |
330 | if (copy_from_user(params, _params, sizeof(*params))) { | |
331 | err = -EFAULT; | |
332 | goto out; | |
333 | } | |
334 | err = snd_pcm_hw_refine(substream, params); | |
335 | if (copy_to_user(_params, params, sizeof(*params))) { | |
336 | if (!err) | |
337 | err = -EFAULT; | |
338 | } | |
339 | out: | |
340 | kfree(params); | |
341 | return err; | |
342 | } | |
343 | ||
877211f5 TI |
344 | static int snd_pcm_hw_params(struct snd_pcm_substream *substream, |
345 | struct snd_pcm_hw_params *params) | |
1da177e4 | 346 | { |
877211f5 | 347 | struct snd_pcm_runtime *runtime; |
1da177e4 LT |
348 | int err; |
349 | unsigned int bits; | |
350 | snd_pcm_uframes_t frames; | |
351 | ||
352 | snd_assert(substream != NULL, return -ENXIO); | |
353 | runtime = substream->runtime; | |
354 | snd_assert(runtime != NULL, return -ENXIO); | |
355 | snd_pcm_stream_lock_irq(substream); | |
356 | switch (runtime->status->state) { | |
357 | case SNDRV_PCM_STATE_OPEN: | |
358 | case SNDRV_PCM_STATE_SETUP: | |
359 | case SNDRV_PCM_STATE_PREPARED: | |
360 | break; | |
361 | default: | |
362 | snd_pcm_stream_unlock_irq(substream); | |
363 | return -EBADFD; | |
364 | } | |
365 | snd_pcm_stream_unlock_irq(substream); | |
366 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) | |
367 | if (!substream->oss.oss) | |
368 | #endif | |
369 | if (atomic_read(&runtime->mmap_count)) | |
370 | return -EBADFD; | |
371 | ||
372 | params->rmask = ~0U; | |
373 | err = snd_pcm_hw_refine(substream, params); | |
374 | if (err < 0) | |
375 | goto _error; | |
376 | ||
377 | err = snd_pcm_hw_params_choose(substream, params); | |
378 | if (err < 0) | |
379 | goto _error; | |
380 | ||
381 | if (substream->ops->hw_params != NULL) { | |
382 | err = substream->ops->hw_params(substream, params); | |
383 | if (err < 0) | |
384 | goto _error; | |
385 | } | |
386 | ||
387 | runtime->access = params_access(params); | |
388 | runtime->format = params_format(params); | |
389 | runtime->subformat = params_subformat(params); | |
390 | runtime->channels = params_channels(params); | |
391 | runtime->rate = params_rate(params); | |
392 | runtime->period_size = params_period_size(params); | |
393 | runtime->periods = params_periods(params); | |
394 | runtime->buffer_size = params_buffer_size(params); | |
395 | runtime->tick_time = params_tick_time(params); | |
396 | runtime->info = params->info; | |
397 | runtime->rate_num = params->rate_num; | |
398 | runtime->rate_den = params->rate_den; | |
399 | ||
400 | bits = snd_pcm_format_physical_width(runtime->format); | |
401 | runtime->sample_bits = bits; | |
402 | bits *= runtime->channels; | |
403 | runtime->frame_bits = bits; | |
404 | frames = 1; | |
405 | while (bits % 8 != 0) { | |
406 | bits *= 2; | |
407 | frames *= 2; | |
408 | } | |
409 | runtime->byte_align = bits / 8; | |
410 | runtime->min_align = frames; | |
411 | ||
412 | /* Default sw params */ | |
413 | runtime->tstamp_mode = SNDRV_PCM_TSTAMP_NONE; | |
414 | runtime->period_step = 1; | |
415 | runtime->sleep_min = 0; | |
416 | runtime->control->avail_min = runtime->period_size; | |
417 | runtime->xfer_align = runtime->period_size; | |
418 | runtime->start_threshold = 1; | |
419 | runtime->stop_threshold = runtime->buffer_size; | |
420 | runtime->silence_threshold = 0; | |
421 | runtime->silence_size = 0; | |
422 | runtime->boundary = runtime->buffer_size; | |
423 | while (runtime->boundary * 2 <= LONG_MAX - runtime->buffer_size) | |
424 | runtime->boundary *= 2; | |
425 | ||
426 | snd_pcm_timer_resolution_change(substream); | |
427 | runtime->status->state = SNDRV_PCM_STATE_SETUP; | |
428 | return 0; | |
429 | _error: | |
430 | /* hardware might be unuseable from this time, | |
431 | so we force application to retry to set | |
432 | the correct hardware parameter settings */ | |
433 | runtime->status->state = SNDRV_PCM_STATE_OPEN; | |
434 | if (substream->ops->hw_free != NULL) | |
435 | substream->ops->hw_free(substream); | |
436 | return err; | |
437 | } | |
438 | ||
877211f5 TI |
439 | static int snd_pcm_hw_params_user(struct snd_pcm_substream *substream, |
440 | struct snd_pcm_hw_params __user * _params) | |
1da177e4 | 441 | { |
877211f5 | 442 | struct snd_pcm_hw_params *params; |
1da177e4 LT |
443 | int err; |
444 | ||
445 | params = kmalloc(sizeof(*params), GFP_KERNEL); | |
446 | if (!params) { | |
447 | err = -ENOMEM; | |
448 | goto out; | |
449 | } | |
450 | if (copy_from_user(params, _params, sizeof(*params))) { | |
451 | err = -EFAULT; | |
452 | goto out; | |
453 | } | |
454 | err = snd_pcm_hw_params(substream, params); | |
455 | if (copy_to_user(_params, params, sizeof(*params))) { | |
456 | if (!err) | |
457 | err = -EFAULT; | |
458 | } | |
459 | out: | |
460 | kfree(params); | |
461 | return err; | |
462 | } | |
463 | ||
877211f5 | 464 | static int snd_pcm_hw_free(struct snd_pcm_substream *substream) |
1da177e4 | 465 | { |
877211f5 | 466 | struct snd_pcm_runtime *runtime; |
1da177e4 LT |
467 | int result = 0; |
468 | ||
469 | snd_assert(substream != NULL, return -ENXIO); | |
470 | runtime = substream->runtime; | |
471 | snd_assert(runtime != NULL, return -ENXIO); | |
472 | snd_pcm_stream_lock_irq(substream); | |
473 | switch (runtime->status->state) { | |
474 | case SNDRV_PCM_STATE_SETUP: | |
475 | case SNDRV_PCM_STATE_PREPARED: | |
476 | break; | |
477 | default: | |
478 | snd_pcm_stream_unlock_irq(substream); | |
479 | return -EBADFD; | |
480 | } | |
481 | snd_pcm_stream_unlock_irq(substream); | |
482 | if (atomic_read(&runtime->mmap_count)) | |
483 | return -EBADFD; | |
484 | if (substream->ops->hw_free) | |
485 | result = substream->ops->hw_free(substream); | |
486 | runtime->status->state = SNDRV_PCM_STATE_OPEN; | |
487 | return result; | |
488 | } | |
489 | ||
877211f5 TI |
490 | static int snd_pcm_sw_params(struct snd_pcm_substream *substream, |
491 | struct snd_pcm_sw_params *params) | |
1da177e4 | 492 | { |
877211f5 | 493 | struct snd_pcm_runtime *runtime; |
1da177e4 LT |
494 | |
495 | snd_assert(substream != NULL, return -ENXIO); | |
496 | runtime = substream->runtime; | |
497 | snd_assert(runtime != NULL, return -ENXIO); | |
498 | snd_pcm_stream_lock_irq(substream); | |
499 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { | |
500 | snd_pcm_stream_unlock_irq(substream); | |
501 | return -EBADFD; | |
502 | } | |
503 | snd_pcm_stream_unlock_irq(substream); | |
504 | ||
505 | if (params->tstamp_mode > SNDRV_PCM_TSTAMP_LAST) | |
506 | return -EINVAL; | |
507 | if (params->avail_min == 0) | |
508 | return -EINVAL; | |
509 | if (params->xfer_align == 0 || | |
510 | params->xfer_align % runtime->min_align != 0) | |
511 | return -EINVAL; | |
512 | if (params->silence_size >= runtime->boundary) { | |
513 | if (params->silence_threshold != 0) | |
514 | return -EINVAL; | |
515 | } else { | |
516 | if (params->silence_size > params->silence_threshold) | |
517 | return -EINVAL; | |
518 | if (params->silence_threshold > runtime->buffer_size) | |
519 | return -EINVAL; | |
520 | } | |
521 | snd_pcm_stream_lock_irq(substream); | |
522 | runtime->tstamp_mode = params->tstamp_mode; | |
523 | runtime->sleep_min = params->sleep_min; | |
524 | runtime->period_step = params->period_step; | |
525 | runtime->control->avail_min = params->avail_min; | |
526 | runtime->start_threshold = params->start_threshold; | |
527 | runtime->stop_threshold = params->stop_threshold; | |
528 | runtime->silence_threshold = params->silence_threshold; | |
529 | runtime->silence_size = params->silence_size; | |
530 | runtime->xfer_align = params->xfer_align; | |
531 | params->boundary = runtime->boundary; | |
532 | if (snd_pcm_running(substream)) { | |
533 | if (runtime->sleep_min) | |
534 | snd_pcm_tick_prepare(substream); | |
535 | else | |
536 | snd_pcm_tick_set(substream, 0); | |
537 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && | |
538 | runtime->silence_size > 0) | |
539 | snd_pcm_playback_silence(substream, ULONG_MAX); | |
540 | wake_up(&runtime->sleep); | |
541 | } | |
542 | snd_pcm_stream_unlock_irq(substream); | |
543 | return 0; | |
544 | } | |
545 | ||
877211f5 TI |
546 | static int snd_pcm_sw_params_user(struct snd_pcm_substream *substream, |
547 | struct snd_pcm_sw_params __user * _params) | |
1da177e4 | 548 | { |
877211f5 | 549 | struct snd_pcm_sw_params params; |
1da177e4 LT |
550 | int err; |
551 | if (copy_from_user(¶ms, _params, sizeof(params))) | |
552 | return -EFAULT; | |
553 | err = snd_pcm_sw_params(substream, ¶ms); | |
554 | if (copy_to_user(_params, ¶ms, sizeof(params))) | |
555 | return -EFAULT; | |
556 | return err; | |
557 | } | |
558 | ||
877211f5 TI |
559 | int snd_pcm_status(struct snd_pcm_substream *substream, |
560 | struct snd_pcm_status *status) | |
1da177e4 | 561 | { |
877211f5 | 562 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
563 | |
564 | snd_pcm_stream_lock_irq(substream); | |
565 | status->state = runtime->status->state; | |
566 | status->suspended_state = runtime->status->suspended_state; | |
567 | if (status->state == SNDRV_PCM_STATE_OPEN) | |
568 | goto _end; | |
569 | status->trigger_tstamp = runtime->trigger_tstamp; | |
570 | if (snd_pcm_running(substream)) { | |
571 | snd_pcm_update_hw_ptr(substream); | |
572 | if (runtime->tstamp_mode & SNDRV_PCM_TSTAMP_MMAP) | |
573 | status->tstamp = runtime->status->tstamp; | |
574 | else | |
07799e75 | 575 | getnstimeofday(&status->tstamp); |
1da177e4 | 576 | } else |
07799e75 | 577 | getnstimeofday(&status->tstamp); |
1da177e4 LT |
578 | status->appl_ptr = runtime->control->appl_ptr; |
579 | status->hw_ptr = runtime->status->hw_ptr; | |
580 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { | |
581 | status->avail = snd_pcm_playback_avail(runtime); | |
582 | if (runtime->status->state == SNDRV_PCM_STATE_RUNNING || | |
583 | runtime->status->state == SNDRV_PCM_STATE_DRAINING) | |
584 | status->delay = runtime->buffer_size - status->avail; | |
585 | else | |
586 | status->delay = 0; | |
587 | } else { | |
588 | status->avail = snd_pcm_capture_avail(runtime); | |
589 | if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) | |
590 | status->delay = status->avail; | |
591 | else | |
592 | status->delay = 0; | |
593 | } | |
594 | status->avail_max = runtime->avail_max; | |
595 | status->overrange = runtime->overrange; | |
596 | runtime->avail_max = 0; | |
597 | runtime->overrange = 0; | |
598 | _end: | |
599 | snd_pcm_stream_unlock_irq(substream); | |
600 | return 0; | |
601 | } | |
602 | ||
877211f5 TI |
603 | static int snd_pcm_status_user(struct snd_pcm_substream *substream, |
604 | struct snd_pcm_status __user * _status) | |
1da177e4 | 605 | { |
877211f5 TI |
606 | struct snd_pcm_status status; |
607 | struct snd_pcm_runtime *runtime; | |
1da177e4 LT |
608 | int res; |
609 | ||
610 | snd_assert(substream != NULL, return -ENXIO); | |
611 | runtime = substream->runtime; | |
612 | memset(&status, 0, sizeof(status)); | |
613 | res = snd_pcm_status(substream, &status); | |
614 | if (res < 0) | |
615 | return res; | |
616 | if (copy_to_user(_status, &status, sizeof(status))) | |
617 | return -EFAULT; | |
618 | return 0; | |
619 | } | |
620 | ||
877211f5 TI |
621 | static int snd_pcm_channel_info(struct snd_pcm_substream *substream, |
622 | struct snd_pcm_channel_info * info) | |
1da177e4 | 623 | { |
877211f5 | 624 | struct snd_pcm_runtime *runtime; |
1da177e4 LT |
625 | unsigned int channel; |
626 | ||
627 | snd_assert(substream != NULL, return -ENXIO); | |
628 | channel = info->channel; | |
629 | runtime = substream->runtime; | |
630 | snd_pcm_stream_lock_irq(substream); | |
631 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { | |
632 | snd_pcm_stream_unlock_irq(substream); | |
633 | return -EBADFD; | |
634 | } | |
635 | snd_pcm_stream_unlock_irq(substream); | |
636 | if (channel >= runtime->channels) | |
637 | return -EINVAL; | |
638 | memset(info, 0, sizeof(*info)); | |
639 | info->channel = channel; | |
640 | return substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_CHANNEL_INFO, info); | |
641 | } | |
642 | ||
877211f5 TI |
643 | static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream, |
644 | struct snd_pcm_channel_info __user * _info) | |
1da177e4 | 645 | { |
877211f5 | 646 | struct snd_pcm_channel_info info; |
1da177e4 LT |
647 | int res; |
648 | ||
649 | if (copy_from_user(&info, _info, sizeof(info))) | |
650 | return -EFAULT; | |
651 | res = snd_pcm_channel_info(substream, &info); | |
652 | if (res < 0) | |
653 | return res; | |
654 | if (copy_to_user(_info, &info, sizeof(info))) | |
655 | return -EFAULT; | |
656 | return 0; | |
657 | } | |
658 | ||
877211f5 | 659 | static void snd_pcm_trigger_tstamp(struct snd_pcm_substream *substream) |
1da177e4 | 660 | { |
877211f5 | 661 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
662 | if (runtime->trigger_master == NULL) |
663 | return; | |
664 | if (runtime->trigger_master == substream) { | |
07799e75 | 665 | getnstimeofday(&runtime->trigger_tstamp); |
1da177e4 LT |
666 | } else { |
667 | snd_pcm_trigger_tstamp(runtime->trigger_master); | |
668 | runtime->trigger_tstamp = runtime->trigger_master->runtime->trigger_tstamp; | |
669 | } | |
670 | runtime->trigger_master = NULL; | |
671 | } | |
672 | ||
673 | struct action_ops { | |
877211f5 TI |
674 | int (*pre_action)(struct snd_pcm_substream *substream, int state); |
675 | int (*do_action)(struct snd_pcm_substream *substream, int state); | |
676 | void (*undo_action)(struct snd_pcm_substream *substream, int state); | |
677 | void (*post_action)(struct snd_pcm_substream *substream, int state); | |
1da177e4 LT |
678 | }; |
679 | ||
680 | /* | |
681 | * this functions is core for handling of linked stream | |
682 | * Note: the stream state might be changed also on failure | |
683 | * Note2: call with calling stream lock + link lock | |
684 | */ | |
685 | static int snd_pcm_action_group(struct action_ops *ops, | |
877211f5 | 686 | struct snd_pcm_substream *substream, |
1da177e4 LT |
687 | int state, int do_lock) |
688 | { | |
689 | struct list_head *pos; | |
877211f5 TI |
690 | struct snd_pcm_substream *s = NULL; |
691 | struct snd_pcm_substream *s1; | |
1da177e4 LT |
692 | int res = 0; |
693 | ||
694 | snd_pcm_group_for_each(pos, substream) { | |
695 | s = snd_pcm_group_substream_entry(pos); | |
696 | if (do_lock && s != substream) | |
697 | spin_lock(&s->self_group.lock); | |
698 | res = ops->pre_action(s, state); | |
699 | if (res < 0) | |
700 | goto _unlock; | |
701 | } | |
702 | snd_pcm_group_for_each(pos, substream) { | |
703 | s = snd_pcm_group_substream_entry(pos); | |
704 | res = ops->do_action(s, state); | |
705 | if (res < 0) { | |
706 | if (ops->undo_action) { | |
707 | snd_pcm_group_for_each(pos, substream) { | |
708 | s1 = snd_pcm_group_substream_entry(pos); | |
709 | if (s1 == s) /* failed stream */ | |
710 | break; | |
711 | ops->undo_action(s1, state); | |
712 | } | |
713 | } | |
714 | s = NULL; /* unlock all */ | |
715 | goto _unlock; | |
716 | } | |
717 | } | |
718 | snd_pcm_group_for_each(pos, substream) { | |
719 | s = snd_pcm_group_substream_entry(pos); | |
720 | ops->post_action(s, state); | |
721 | } | |
722 | _unlock: | |
723 | if (do_lock) { | |
724 | /* unlock streams */ | |
725 | snd_pcm_group_for_each(pos, substream) { | |
726 | s1 = snd_pcm_group_substream_entry(pos); | |
727 | if (s1 != substream) | |
728 | spin_unlock(&s1->self_group.lock); | |
729 | if (s1 == s) /* end */ | |
730 | break; | |
731 | } | |
732 | } | |
733 | return res; | |
734 | } | |
735 | ||
736 | /* | |
737 | * Note: call with stream lock | |
738 | */ | |
739 | static int snd_pcm_action_single(struct action_ops *ops, | |
877211f5 | 740 | struct snd_pcm_substream *substream, |
1da177e4 LT |
741 | int state) |
742 | { | |
743 | int res; | |
744 | ||
745 | res = ops->pre_action(substream, state); | |
746 | if (res < 0) | |
747 | return res; | |
748 | res = ops->do_action(substream, state); | |
749 | if (res == 0) | |
750 | ops->post_action(substream, state); | |
751 | else if (ops->undo_action) | |
752 | ops->undo_action(substream, state); | |
753 | return res; | |
754 | } | |
755 | ||
756 | /* | |
757 | * Note: call with stream lock | |
758 | */ | |
759 | static int snd_pcm_action(struct action_ops *ops, | |
877211f5 | 760 | struct snd_pcm_substream *substream, |
1da177e4 LT |
761 | int state) |
762 | { | |
763 | int res; | |
764 | ||
765 | if (snd_pcm_stream_linked(substream)) { | |
766 | if (!spin_trylock(&substream->group->lock)) { | |
767 | spin_unlock(&substream->self_group.lock); | |
768 | spin_lock(&substream->group->lock); | |
769 | spin_lock(&substream->self_group.lock); | |
770 | } | |
771 | res = snd_pcm_action_group(ops, substream, state, 1); | |
772 | spin_unlock(&substream->group->lock); | |
773 | } else { | |
774 | res = snd_pcm_action_single(ops, substream, state); | |
775 | } | |
776 | return res; | |
777 | } | |
778 | ||
779 | /* | |
780 | * Note: don't use any locks before | |
781 | */ | |
782 | static int snd_pcm_action_lock_irq(struct action_ops *ops, | |
877211f5 | 783 | struct snd_pcm_substream *substream, |
1da177e4 LT |
784 | int state) |
785 | { | |
786 | int res; | |
787 | ||
788 | read_lock_irq(&snd_pcm_link_rwlock); | |
789 | if (snd_pcm_stream_linked(substream)) { | |
790 | spin_lock(&substream->group->lock); | |
791 | spin_lock(&substream->self_group.lock); | |
792 | res = snd_pcm_action_group(ops, substream, state, 1); | |
793 | spin_unlock(&substream->self_group.lock); | |
794 | spin_unlock(&substream->group->lock); | |
795 | } else { | |
796 | spin_lock(&substream->self_group.lock); | |
797 | res = snd_pcm_action_single(ops, substream, state); | |
798 | spin_unlock(&substream->self_group.lock); | |
799 | } | |
800 | read_unlock_irq(&snd_pcm_link_rwlock); | |
801 | return res; | |
802 | } | |
803 | ||
804 | /* | |
805 | */ | |
806 | static int snd_pcm_action_nonatomic(struct action_ops *ops, | |
877211f5 | 807 | struct snd_pcm_substream *substream, |
1da177e4 LT |
808 | int state) |
809 | { | |
810 | int res; | |
811 | ||
812 | down_read(&snd_pcm_link_rwsem); | |
813 | if (snd_pcm_stream_linked(substream)) | |
814 | res = snd_pcm_action_group(ops, substream, state, 0); | |
815 | else | |
816 | res = snd_pcm_action_single(ops, substream, state); | |
817 | up_read(&snd_pcm_link_rwsem); | |
818 | return res; | |
819 | } | |
820 | ||
821 | /* | |
822 | * start callbacks | |
823 | */ | |
877211f5 | 824 | static int snd_pcm_pre_start(struct snd_pcm_substream *substream, int state) |
1da177e4 | 825 | { |
877211f5 | 826 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
827 | if (runtime->status->state != SNDRV_PCM_STATE_PREPARED) |
828 | return -EBADFD; | |
829 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && | |
830 | !snd_pcm_playback_data(substream)) | |
831 | return -EPIPE; | |
832 | runtime->trigger_master = substream; | |
833 | return 0; | |
834 | } | |
835 | ||
877211f5 | 836 | static int snd_pcm_do_start(struct snd_pcm_substream *substream, int state) |
1da177e4 LT |
837 | { |
838 | if (substream->runtime->trigger_master != substream) | |
839 | return 0; | |
840 | return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_START); | |
841 | } | |
842 | ||
877211f5 | 843 | static void snd_pcm_undo_start(struct snd_pcm_substream *substream, int state) |
1da177e4 LT |
844 | { |
845 | if (substream->runtime->trigger_master == substream) | |
846 | substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP); | |
847 | } | |
848 | ||
877211f5 | 849 | static void snd_pcm_post_start(struct snd_pcm_substream *substream, int state) |
1da177e4 | 850 | { |
877211f5 | 851 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
852 | snd_pcm_trigger_tstamp(substream); |
853 | runtime->status->state = state; | |
854 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && | |
855 | runtime->silence_size > 0) | |
856 | snd_pcm_playback_silence(substream, ULONG_MAX); | |
857 | if (runtime->sleep_min) | |
858 | snd_pcm_tick_prepare(substream); | |
859 | if (substream->timer) | |
877211f5 TI |
860 | snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTART, |
861 | &runtime->trigger_tstamp); | |
1da177e4 LT |
862 | } |
863 | ||
864 | static struct action_ops snd_pcm_action_start = { | |
865 | .pre_action = snd_pcm_pre_start, | |
866 | .do_action = snd_pcm_do_start, | |
867 | .undo_action = snd_pcm_undo_start, | |
868 | .post_action = snd_pcm_post_start | |
869 | }; | |
870 | ||
871 | /** | |
872 | * snd_pcm_start | |
df8db936 | 873 | * @substream: the PCM substream instance |
1da177e4 LT |
874 | * |
875 | * Start all linked streams. | |
876 | */ | |
877211f5 | 877 | int snd_pcm_start(struct snd_pcm_substream *substream) |
1da177e4 | 878 | { |
877211f5 TI |
879 | return snd_pcm_action(&snd_pcm_action_start, substream, |
880 | SNDRV_PCM_STATE_RUNNING); | |
1da177e4 LT |
881 | } |
882 | ||
883 | /* | |
884 | * stop callbacks | |
885 | */ | |
877211f5 | 886 | static int snd_pcm_pre_stop(struct snd_pcm_substream *substream, int state) |
1da177e4 | 887 | { |
877211f5 | 888 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
889 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) |
890 | return -EBADFD; | |
891 | runtime->trigger_master = substream; | |
892 | return 0; | |
893 | } | |
894 | ||
877211f5 | 895 | static int snd_pcm_do_stop(struct snd_pcm_substream *substream, int state) |
1da177e4 LT |
896 | { |
897 | if (substream->runtime->trigger_master == substream && | |
898 | snd_pcm_running(substream)) | |
899 | substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP); | |
900 | return 0; /* unconditonally stop all substreams */ | |
901 | } | |
902 | ||
877211f5 | 903 | static void snd_pcm_post_stop(struct snd_pcm_substream *substream, int state) |
1da177e4 | 904 | { |
877211f5 | 905 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
906 | if (runtime->status->state != state) { |
907 | snd_pcm_trigger_tstamp(substream); | |
908 | if (substream->timer) | |
877211f5 TI |
909 | snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTOP, |
910 | &runtime->trigger_tstamp); | |
1da177e4 LT |
911 | runtime->status->state = state; |
912 | snd_pcm_tick_set(substream, 0); | |
913 | } | |
914 | wake_up(&runtime->sleep); | |
915 | } | |
916 | ||
917 | static struct action_ops snd_pcm_action_stop = { | |
918 | .pre_action = snd_pcm_pre_stop, | |
919 | .do_action = snd_pcm_do_stop, | |
920 | .post_action = snd_pcm_post_stop | |
921 | }; | |
922 | ||
923 | /** | |
924 | * snd_pcm_stop | |
df8db936 TI |
925 | * @substream: the PCM substream instance |
926 | * @state: PCM state after stopping the stream | |
1da177e4 LT |
927 | * |
928 | * Try to stop all running streams in the substream group. | |
929 | * The state of each stream is changed to the given value after that unconditionally. | |
930 | */ | |
877211f5 | 931 | int snd_pcm_stop(struct snd_pcm_substream *substream, int state) |
1da177e4 LT |
932 | { |
933 | return snd_pcm_action(&snd_pcm_action_stop, substream, state); | |
934 | } | |
935 | ||
936 | /** | |
937 | * snd_pcm_drain_done | |
df8db936 | 938 | * @substream: the PCM substream |
1da177e4 LT |
939 | * |
940 | * Stop the DMA only when the given stream is playback. | |
941 | * The state is changed to SETUP. | |
942 | * Unlike snd_pcm_stop(), this affects only the given stream. | |
943 | */ | |
877211f5 | 944 | int snd_pcm_drain_done(struct snd_pcm_substream *substream) |
1da177e4 | 945 | { |
877211f5 TI |
946 | return snd_pcm_action_single(&snd_pcm_action_stop, substream, |
947 | SNDRV_PCM_STATE_SETUP); | |
1da177e4 LT |
948 | } |
949 | ||
950 | /* | |
951 | * pause callbacks | |
952 | */ | |
877211f5 | 953 | static int snd_pcm_pre_pause(struct snd_pcm_substream *substream, int push) |
1da177e4 | 954 | { |
877211f5 | 955 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
956 | if (!(runtime->info & SNDRV_PCM_INFO_PAUSE)) |
957 | return -ENOSYS; | |
958 | if (push) { | |
959 | if (runtime->status->state != SNDRV_PCM_STATE_RUNNING) | |
960 | return -EBADFD; | |
961 | } else if (runtime->status->state != SNDRV_PCM_STATE_PAUSED) | |
962 | return -EBADFD; | |
963 | runtime->trigger_master = substream; | |
964 | return 0; | |
965 | } | |
966 | ||
877211f5 | 967 | static int snd_pcm_do_pause(struct snd_pcm_substream *substream, int push) |
1da177e4 LT |
968 | { |
969 | if (substream->runtime->trigger_master != substream) | |
970 | return 0; | |
971 | return substream->ops->trigger(substream, | |
972 | push ? SNDRV_PCM_TRIGGER_PAUSE_PUSH : | |
973 | SNDRV_PCM_TRIGGER_PAUSE_RELEASE); | |
974 | } | |
975 | ||
877211f5 | 976 | static void snd_pcm_undo_pause(struct snd_pcm_substream *substream, int push) |
1da177e4 LT |
977 | { |
978 | if (substream->runtime->trigger_master == substream) | |
979 | substream->ops->trigger(substream, | |
980 | push ? SNDRV_PCM_TRIGGER_PAUSE_RELEASE : | |
981 | SNDRV_PCM_TRIGGER_PAUSE_PUSH); | |
982 | } | |
983 | ||
877211f5 | 984 | static void snd_pcm_post_pause(struct snd_pcm_substream *substream, int push) |
1da177e4 | 985 | { |
877211f5 | 986 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
987 | snd_pcm_trigger_tstamp(substream); |
988 | if (push) { | |
989 | runtime->status->state = SNDRV_PCM_STATE_PAUSED; | |
990 | if (substream->timer) | |
877211f5 TI |
991 | snd_timer_notify(substream->timer, |
992 | SNDRV_TIMER_EVENT_MPAUSE, | |
993 | &runtime->trigger_tstamp); | |
1da177e4 LT |
994 | snd_pcm_tick_set(substream, 0); |
995 | wake_up(&runtime->sleep); | |
996 | } else { | |
997 | runtime->status->state = SNDRV_PCM_STATE_RUNNING; | |
998 | if (runtime->sleep_min) | |
999 | snd_pcm_tick_prepare(substream); | |
1000 | if (substream->timer) | |
877211f5 TI |
1001 | snd_timer_notify(substream->timer, |
1002 | SNDRV_TIMER_EVENT_MCONTINUE, | |
1003 | &runtime->trigger_tstamp); | |
1da177e4 LT |
1004 | } |
1005 | } | |
1006 | ||
1007 | static struct action_ops snd_pcm_action_pause = { | |
1008 | .pre_action = snd_pcm_pre_pause, | |
1009 | .do_action = snd_pcm_do_pause, | |
1010 | .undo_action = snd_pcm_undo_pause, | |
1011 | .post_action = snd_pcm_post_pause | |
1012 | }; | |
1013 | ||
1014 | /* | |
1015 | * Push/release the pause for all linked streams. | |
1016 | */ | |
877211f5 | 1017 | static int snd_pcm_pause(struct snd_pcm_substream *substream, int push) |
1da177e4 LT |
1018 | { |
1019 | return snd_pcm_action(&snd_pcm_action_pause, substream, push); | |
1020 | } | |
1021 | ||
1022 | #ifdef CONFIG_PM | |
1023 | /* suspend */ | |
1024 | ||
877211f5 | 1025 | static int snd_pcm_pre_suspend(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1026 | { |
877211f5 | 1027 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1028 | if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) |
1029 | return -EBUSY; | |
1030 | runtime->trigger_master = substream; | |
1031 | return 0; | |
1032 | } | |
1033 | ||
877211f5 | 1034 | static int snd_pcm_do_suspend(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1035 | { |
877211f5 | 1036 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1037 | if (runtime->trigger_master != substream) |
1038 | return 0; | |
1039 | if (! snd_pcm_running(substream)) | |
1040 | return 0; | |
1041 | substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND); | |
1042 | return 0; /* suspend unconditionally */ | |
1043 | } | |
1044 | ||
877211f5 | 1045 | static void snd_pcm_post_suspend(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1046 | { |
877211f5 | 1047 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1048 | snd_pcm_trigger_tstamp(substream); |
1049 | if (substream->timer) | |
877211f5 TI |
1050 | snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSUSPEND, |
1051 | &runtime->trigger_tstamp); | |
1da177e4 LT |
1052 | runtime->status->suspended_state = runtime->status->state; |
1053 | runtime->status->state = SNDRV_PCM_STATE_SUSPENDED; | |
1054 | snd_pcm_tick_set(substream, 0); | |
1055 | wake_up(&runtime->sleep); | |
1056 | } | |
1057 | ||
1058 | static struct action_ops snd_pcm_action_suspend = { | |
1059 | .pre_action = snd_pcm_pre_suspend, | |
1060 | .do_action = snd_pcm_do_suspend, | |
1061 | .post_action = snd_pcm_post_suspend | |
1062 | }; | |
1063 | ||
1064 | /** | |
1065 | * snd_pcm_suspend | |
df8db936 | 1066 | * @substream: the PCM substream |
1da177e4 LT |
1067 | * |
1068 | * Trigger SUSPEND to all linked streams. | |
1069 | * After this call, all streams are changed to SUSPENDED state. | |
1070 | */ | |
877211f5 | 1071 | int snd_pcm_suspend(struct snd_pcm_substream *substream) |
1da177e4 LT |
1072 | { |
1073 | int err; | |
1074 | unsigned long flags; | |
1075 | ||
1076 | snd_pcm_stream_lock_irqsave(substream, flags); | |
1077 | err = snd_pcm_action(&snd_pcm_action_suspend, substream, 0); | |
1078 | snd_pcm_stream_unlock_irqrestore(substream, flags); | |
1079 | return err; | |
1080 | } | |
1081 | ||
1082 | /** | |
1083 | * snd_pcm_suspend_all | |
df8db936 | 1084 | * @pcm: the PCM instance |
1da177e4 LT |
1085 | * |
1086 | * Trigger SUSPEND to all substreams in the given pcm. | |
1087 | * After this call, all streams are changed to SUSPENDED state. | |
1088 | */ | |
877211f5 | 1089 | int snd_pcm_suspend_all(struct snd_pcm *pcm) |
1da177e4 | 1090 | { |
877211f5 | 1091 | struct snd_pcm_substream *substream; |
1da177e4 LT |
1092 | int stream, err = 0; |
1093 | ||
1094 | for (stream = 0; stream < 2; stream++) { | |
877211f5 TI |
1095 | for (substream = pcm->streams[stream].substream; |
1096 | substream; substream = substream->next) { | |
1da177e4 LT |
1097 | /* FIXME: the open/close code should lock this as well */ |
1098 | if (substream->runtime == NULL) | |
1099 | continue; | |
1100 | err = snd_pcm_suspend(substream); | |
1101 | if (err < 0 && err != -EBUSY) | |
1102 | return err; | |
1103 | } | |
1104 | } | |
1105 | return 0; | |
1106 | } | |
1107 | ||
1108 | /* resume */ | |
1109 | ||
877211f5 | 1110 | static int snd_pcm_pre_resume(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1111 | { |
877211f5 | 1112 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1113 | if (!(runtime->info & SNDRV_PCM_INFO_RESUME)) |
1114 | return -ENOSYS; | |
1115 | runtime->trigger_master = substream; | |
1116 | return 0; | |
1117 | } | |
1118 | ||
877211f5 | 1119 | static int snd_pcm_do_resume(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1120 | { |
877211f5 | 1121 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1122 | if (runtime->trigger_master != substream) |
1123 | return 0; | |
1124 | /* DMA not running previously? */ | |
1125 | if (runtime->status->suspended_state != SNDRV_PCM_STATE_RUNNING && | |
1126 | (runtime->status->suspended_state != SNDRV_PCM_STATE_DRAINING || | |
1127 | substream->stream != SNDRV_PCM_STREAM_PLAYBACK)) | |
1128 | return 0; | |
1129 | return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_RESUME); | |
1130 | } | |
1131 | ||
877211f5 | 1132 | static void snd_pcm_undo_resume(struct snd_pcm_substream *substream, int state) |
1da177e4 LT |
1133 | { |
1134 | if (substream->runtime->trigger_master == substream && | |
1135 | snd_pcm_running(substream)) | |
1136 | substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND); | |
1137 | } | |
1138 | ||
877211f5 | 1139 | static void snd_pcm_post_resume(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1140 | { |
877211f5 | 1141 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1142 | snd_pcm_trigger_tstamp(substream); |
1143 | if (substream->timer) | |
877211f5 TI |
1144 | snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MRESUME, |
1145 | &runtime->trigger_tstamp); | |
1da177e4 LT |
1146 | runtime->status->state = runtime->status->suspended_state; |
1147 | if (runtime->sleep_min) | |
1148 | snd_pcm_tick_prepare(substream); | |
1149 | } | |
1150 | ||
1151 | static struct action_ops snd_pcm_action_resume = { | |
1152 | .pre_action = snd_pcm_pre_resume, | |
1153 | .do_action = snd_pcm_do_resume, | |
1154 | .undo_action = snd_pcm_undo_resume, | |
1155 | .post_action = snd_pcm_post_resume | |
1156 | }; | |
1157 | ||
877211f5 | 1158 | static int snd_pcm_resume(struct snd_pcm_substream *substream) |
1da177e4 | 1159 | { |
877211f5 | 1160 | struct snd_card *card = substream->pcm->card; |
1da177e4 LT |
1161 | int res; |
1162 | ||
1163 | snd_power_lock(card); | |
1164 | if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0, substream->ffile)) >= 0) | |
1165 | res = snd_pcm_action_lock_irq(&snd_pcm_action_resume, substream, 0); | |
1166 | snd_power_unlock(card); | |
1167 | return res; | |
1168 | } | |
1169 | ||
1170 | #else | |
1171 | ||
877211f5 | 1172 | static int snd_pcm_resume(struct snd_pcm_substream *substream) |
1da177e4 LT |
1173 | { |
1174 | return -ENOSYS; | |
1175 | } | |
1176 | ||
1177 | #endif /* CONFIG_PM */ | |
1178 | ||
1179 | /* | |
1180 | * xrun ioctl | |
1181 | * | |
1182 | * Change the RUNNING stream(s) to XRUN state. | |
1183 | */ | |
877211f5 | 1184 | static int snd_pcm_xrun(struct snd_pcm_substream *substream) |
1da177e4 | 1185 | { |
877211f5 TI |
1186 | struct snd_card *card = substream->pcm->card; |
1187 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1da177e4 LT |
1188 | int result; |
1189 | ||
1190 | snd_power_lock(card); | |
1191 | if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { | |
1192 | result = snd_power_wait(card, SNDRV_CTL_POWER_D0, substream->ffile); | |
1193 | if (result < 0) | |
1194 | goto _unlock; | |
1195 | } | |
1196 | ||
1197 | snd_pcm_stream_lock_irq(substream); | |
1198 | switch (runtime->status->state) { | |
1199 | case SNDRV_PCM_STATE_XRUN: | |
1200 | result = 0; /* already there */ | |
1201 | break; | |
1202 | case SNDRV_PCM_STATE_RUNNING: | |
1203 | result = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN); | |
1204 | break; | |
1205 | default: | |
1206 | result = -EBADFD; | |
1207 | } | |
1208 | snd_pcm_stream_unlock_irq(substream); | |
1209 | _unlock: | |
1210 | snd_power_unlock(card); | |
1211 | return result; | |
1212 | } | |
1213 | ||
1214 | /* | |
1215 | * reset ioctl | |
1216 | */ | |
877211f5 | 1217 | static int snd_pcm_pre_reset(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1218 | { |
877211f5 | 1219 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1220 | switch (runtime->status->state) { |
1221 | case SNDRV_PCM_STATE_RUNNING: | |
1222 | case SNDRV_PCM_STATE_PREPARED: | |
1223 | case SNDRV_PCM_STATE_PAUSED: | |
1224 | case SNDRV_PCM_STATE_SUSPENDED: | |
1225 | return 0; | |
1226 | default: | |
1227 | return -EBADFD; | |
1228 | } | |
1229 | } | |
1230 | ||
877211f5 | 1231 | static int snd_pcm_do_reset(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1232 | { |
877211f5 | 1233 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1234 | int err = substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL); |
1235 | if (err < 0) | |
1236 | return err; | |
1237 | // snd_assert(runtime->status->hw_ptr < runtime->buffer_size, ); | |
1238 | runtime->hw_ptr_base = 0; | |
877211f5 TI |
1239 | runtime->hw_ptr_interrupt = runtime->status->hw_ptr - |
1240 | runtime->status->hw_ptr % runtime->period_size; | |
1da177e4 LT |
1241 | runtime->silence_start = runtime->status->hw_ptr; |
1242 | runtime->silence_filled = 0; | |
1243 | return 0; | |
1244 | } | |
1245 | ||
877211f5 | 1246 | static void snd_pcm_post_reset(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1247 | { |
877211f5 | 1248 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1249 | runtime->control->appl_ptr = runtime->status->hw_ptr; |
1250 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && | |
1251 | runtime->silence_size > 0) | |
1252 | snd_pcm_playback_silence(substream, ULONG_MAX); | |
1253 | } | |
1254 | ||
1255 | static struct action_ops snd_pcm_action_reset = { | |
1256 | .pre_action = snd_pcm_pre_reset, | |
1257 | .do_action = snd_pcm_do_reset, | |
1258 | .post_action = snd_pcm_post_reset | |
1259 | }; | |
1260 | ||
877211f5 | 1261 | static int snd_pcm_reset(struct snd_pcm_substream *substream) |
1da177e4 LT |
1262 | { |
1263 | return snd_pcm_action_nonatomic(&snd_pcm_action_reset, substream, 0); | |
1264 | } | |
1265 | ||
1266 | /* | |
1267 | * prepare ioctl | |
1268 | */ | |
877211f5 | 1269 | static int snd_pcm_pre_prepare(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1270 | { |
877211f5 | 1271 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1272 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) |
1273 | return -EBADFD; | |
1274 | if (snd_pcm_running(substream)) | |
1275 | return -EBUSY; | |
1276 | return 0; | |
1277 | } | |
1278 | ||
877211f5 | 1279 | static int snd_pcm_do_prepare(struct snd_pcm_substream *substream, int state) |
1da177e4 LT |
1280 | { |
1281 | int err; | |
1282 | err = substream->ops->prepare(substream); | |
1283 | if (err < 0) | |
1284 | return err; | |
1285 | return snd_pcm_do_reset(substream, 0); | |
1286 | } | |
1287 | ||
877211f5 | 1288 | static void snd_pcm_post_prepare(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1289 | { |
877211f5 | 1290 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1291 | runtime->control->appl_ptr = runtime->status->hw_ptr; |
1292 | runtime->status->state = SNDRV_PCM_STATE_PREPARED; | |
1293 | } | |
1294 | ||
1295 | static struct action_ops snd_pcm_action_prepare = { | |
1296 | .pre_action = snd_pcm_pre_prepare, | |
1297 | .do_action = snd_pcm_do_prepare, | |
1298 | .post_action = snd_pcm_post_prepare | |
1299 | }; | |
1300 | ||
1301 | /** | |
1302 | * snd_pcm_prepare | |
df8db936 TI |
1303 | * @substream: the PCM substream instance |
1304 | * | |
1305 | * Prepare the PCM substream to be triggerable. | |
1da177e4 | 1306 | */ |
877211f5 | 1307 | int snd_pcm_prepare(struct snd_pcm_substream *substream) |
1da177e4 LT |
1308 | { |
1309 | int res; | |
877211f5 | 1310 | struct snd_card *card = substream->pcm->card; |
1da177e4 LT |
1311 | |
1312 | snd_power_lock(card); | |
1313 | if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0, substream->ffile)) >= 0) | |
1314 | res = snd_pcm_action_nonatomic(&snd_pcm_action_prepare, substream, 0); | |
1315 | snd_power_unlock(card); | |
1316 | return res; | |
1317 | } | |
1318 | ||
1319 | /* | |
1320 | * drain ioctl | |
1321 | */ | |
1322 | ||
877211f5 | 1323 | static int snd_pcm_pre_drain_init(struct snd_pcm_substream *substream, int state) |
1da177e4 LT |
1324 | { |
1325 | if (substream->ffile->f_flags & O_NONBLOCK) | |
1326 | return -EAGAIN; | |
1327 | substream->runtime->trigger_master = substream; | |
1328 | return 0; | |
1329 | } | |
1330 | ||
877211f5 | 1331 | static int snd_pcm_do_drain_init(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1332 | { |
877211f5 | 1333 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1334 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { |
1335 | switch (runtime->status->state) { | |
1336 | case SNDRV_PCM_STATE_PREPARED: | |
1337 | /* start playback stream if possible */ | |
1338 | if (! snd_pcm_playback_empty(substream)) { | |
1339 | snd_pcm_do_start(substream, SNDRV_PCM_STATE_DRAINING); | |
1340 | snd_pcm_post_start(substream, SNDRV_PCM_STATE_DRAINING); | |
1341 | } | |
1342 | break; | |
1343 | case SNDRV_PCM_STATE_RUNNING: | |
1344 | runtime->status->state = SNDRV_PCM_STATE_DRAINING; | |
1345 | break; | |
1346 | default: | |
1347 | break; | |
1348 | } | |
1349 | } else { | |
1350 | /* stop running stream */ | |
1351 | if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) { | |
1352 | int state = snd_pcm_capture_avail(runtime) > 0 ? | |
1353 | SNDRV_PCM_STATE_DRAINING : SNDRV_PCM_STATE_SETUP; | |
1354 | snd_pcm_do_stop(substream, state); | |
1355 | snd_pcm_post_stop(substream, state); | |
1356 | } | |
1357 | } | |
1358 | return 0; | |
1359 | } | |
1360 | ||
877211f5 | 1361 | static void snd_pcm_post_drain_init(struct snd_pcm_substream *substream, int state) |
1da177e4 LT |
1362 | { |
1363 | } | |
1364 | ||
1365 | static struct action_ops snd_pcm_action_drain_init = { | |
1366 | .pre_action = snd_pcm_pre_drain_init, | |
1367 | .do_action = snd_pcm_do_drain_init, | |
1368 | .post_action = snd_pcm_post_drain_init | |
1369 | }; | |
1370 | ||
1371 | struct drain_rec { | |
877211f5 | 1372 | struct snd_pcm_substream *substream; |
1da177e4 LT |
1373 | wait_queue_t wait; |
1374 | snd_pcm_uframes_t stop_threshold; | |
1375 | }; | |
1376 | ||
877211f5 | 1377 | static int snd_pcm_drop(struct snd_pcm_substream *substream); |
1da177e4 LT |
1378 | |
1379 | /* | |
1380 | * Drain the stream(s). | |
1381 | * When the substream is linked, sync until the draining of all playback streams | |
1382 | * is finished. | |
1383 | * After this call, all streams are supposed to be either SETUP or DRAINING | |
1384 | * (capture only) state. | |
1385 | */ | |
877211f5 | 1386 | static int snd_pcm_drain(struct snd_pcm_substream *substream) |
1da177e4 | 1387 | { |
877211f5 TI |
1388 | struct snd_card *card; |
1389 | struct snd_pcm_runtime *runtime; | |
1da177e4 LT |
1390 | struct list_head *pos; |
1391 | int result = 0; | |
1392 | int i, num_drecs; | |
1393 | struct drain_rec *drec, drec_tmp, *d; | |
1394 | ||
1395 | snd_assert(substream != NULL, return -ENXIO); | |
1396 | card = substream->pcm->card; | |
1397 | runtime = substream->runtime; | |
1398 | ||
1399 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) | |
1400 | return -EBADFD; | |
1401 | ||
1da177e4 LT |
1402 | snd_power_lock(card); |
1403 | if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { | |
1404 | result = snd_power_wait(card, SNDRV_CTL_POWER_D0, substream->ffile); | |
21cb2a2e TI |
1405 | if (result < 0) { |
1406 | snd_power_unlock(card); | |
1407 | return result; | |
1408 | } | |
1da177e4 LT |
1409 | } |
1410 | ||
1411 | /* allocate temporary record for drain sync */ | |
21cb2a2e | 1412 | down_read(&snd_pcm_link_rwsem); |
1da177e4 LT |
1413 | if (snd_pcm_stream_linked(substream)) { |
1414 | drec = kmalloc(substream->group->count * sizeof(*drec), GFP_KERNEL); | |
1415 | if (! drec) { | |
21cb2a2e TI |
1416 | up_read(&snd_pcm_link_rwsem); |
1417 | snd_power_unlock(card); | |
1418 | return -ENOMEM; | |
1da177e4 LT |
1419 | } |
1420 | } else | |
1421 | drec = &drec_tmp; | |
1422 | ||
21cb2a2e | 1423 | /* count only playback streams */ |
1da177e4 LT |
1424 | num_drecs = 0; |
1425 | snd_pcm_group_for_each(pos, substream) { | |
877211f5 | 1426 | struct snd_pcm_substream *s = snd_pcm_group_substream_entry(pos); |
1da177e4 | 1427 | runtime = s->runtime; |
1da177e4 LT |
1428 | if (s->stream == SNDRV_PCM_STREAM_PLAYBACK) { |
1429 | d = &drec[num_drecs++]; | |
1430 | d->substream = s; | |
1431 | init_waitqueue_entry(&d->wait, current); | |
1432 | add_wait_queue(&runtime->sleep, &d->wait); | |
1433 | /* stop_threshold fixup to avoid endless loop when | |
1434 | * stop_threshold > buffer_size | |
1435 | */ | |
1436 | d->stop_threshold = runtime->stop_threshold; | |
1437 | if (runtime->stop_threshold > runtime->buffer_size) | |
1438 | runtime->stop_threshold = runtime->buffer_size; | |
1439 | } | |
1440 | } | |
21cb2a2e | 1441 | up_read(&snd_pcm_link_rwsem); |
1da177e4 | 1442 | if (! num_drecs) |
21cb2a2e TI |
1443 | goto _error; |
1444 | ||
1445 | snd_pcm_stream_lock_irq(substream); | |
1446 | /* resume pause */ | |
1447 | if (runtime->status->state == SNDRV_PCM_STATE_PAUSED) | |
1448 | snd_pcm_pause(substream, 0); | |
1449 | ||
1450 | /* pre-start/stop - all running streams are changed to DRAINING state */ | |
1451 | result = snd_pcm_action(&snd_pcm_action_drain_init, substream, 0); | |
1452 | if (result < 0) { | |
1453 | snd_pcm_stream_unlock_irq(substream); | |
1454 | goto _error; | |
1455 | } | |
1da177e4 LT |
1456 | |
1457 | for (;;) { | |
1458 | long tout; | |
1459 | if (signal_pending(current)) { | |
1460 | result = -ERESTARTSYS; | |
1461 | break; | |
1462 | } | |
21cb2a2e TI |
1463 | /* all finished? */ |
1464 | for (i = 0; i < num_drecs; i++) { | |
1465 | runtime = drec[i].substream->runtime; | |
1466 | if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) | |
1467 | break; | |
1468 | } | |
1469 | if (i == num_drecs) | |
1470 | break; /* yes, all drained */ | |
1471 | ||
1da177e4 LT |
1472 | set_current_state(TASK_INTERRUPTIBLE); |
1473 | snd_pcm_stream_unlock_irq(substream); | |
1474 | snd_power_unlock(card); | |
1475 | tout = schedule_timeout(10 * HZ); | |
1476 | snd_power_lock(card); | |
1477 | snd_pcm_stream_lock_irq(substream); | |
1478 | if (tout == 0) { | |
1479 | if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) | |
1480 | result = -ESTRPIPE; | |
1481 | else { | |
1482 | snd_printd("playback drain error (DMA or IRQ trouble?)\n"); | |
1483 | snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP); | |
1484 | result = -EIO; | |
1485 | } | |
1486 | break; | |
1487 | } | |
1da177e4 | 1488 | } |
21cb2a2e TI |
1489 | |
1490 | snd_pcm_stream_unlock_irq(substream); | |
1491 | ||
1492 | _error: | |
1da177e4 LT |
1493 | for (i = 0; i < num_drecs; i++) { |
1494 | d = &drec[i]; | |
1495 | runtime = d->substream->runtime; | |
1496 | remove_wait_queue(&runtime->sleep, &d->wait); | |
1497 | runtime->stop_threshold = d->stop_threshold; | |
1498 | } | |
1499 | ||
1da177e4 LT |
1500 | if (drec != &drec_tmp) |
1501 | kfree(drec); | |
1da177e4 | 1502 | snd_power_unlock(card); |
1da177e4 LT |
1503 | |
1504 | return result; | |
1505 | } | |
1506 | ||
1507 | /* | |
1508 | * drop ioctl | |
1509 | * | |
1510 | * Immediately put all linked substreams into SETUP state. | |
1511 | */ | |
877211f5 | 1512 | static int snd_pcm_drop(struct snd_pcm_substream *substream) |
1da177e4 | 1513 | { |
877211f5 TI |
1514 | struct snd_pcm_runtime *runtime; |
1515 | struct snd_card *card; | |
1da177e4 LT |
1516 | int result = 0; |
1517 | ||
1518 | snd_assert(substream != NULL, return -ENXIO); | |
1519 | runtime = substream->runtime; | |
1520 | card = substream->pcm->card; | |
1521 | ||
1522 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) | |
1523 | return -EBADFD; | |
1524 | ||
1525 | snd_power_lock(card); | |
1526 | if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { | |
1527 | result = snd_power_wait(card, SNDRV_CTL_POWER_D0, substream->ffile); | |
1528 | if (result < 0) | |
1529 | goto _unlock; | |
1530 | } | |
1531 | ||
1532 | snd_pcm_stream_lock_irq(substream); | |
1533 | /* resume pause */ | |
1534 | if (runtime->status->state == SNDRV_PCM_STATE_PAUSED) | |
1535 | snd_pcm_pause(substream, 0); | |
1536 | ||
1537 | snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP); | |
1538 | /* runtime->control->appl_ptr = runtime->status->hw_ptr; */ | |
1539 | snd_pcm_stream_unlock_irq(substream); | |
1540 | _unlock: | |
1541 | snd_power_unlock(card); | |
1542 | return result; | |
1543 | } | |
1544 | ||
1545 | ||
1546 | /* WARNING: Don't forget to fput back the file */ | |
1da177e4 LT |
1547 | static struct file *snd_pcm_file_fd(int fd) |
1548 | { | |
1549 | struct file *file; | |
1550 | struct inode *inode; | |
1551 | unsigned short minor; | |
1552 | file = fget(fd); | |
1553 | if (!file) | |
1554 | return NULL; | |
1555 | inode = file->f_dentry->d_inode; | |
1556 | if (!S_ISCHR(inode->i_mode) || | |
1557 | imajor(inode) != snd_major) { | |
1558 | fput(file); | |
1559 | return NULL; | |
1560 | } | |
1561 | minor = iminor(inode); | |
1562 | if (minor >= 256 || | |
1563 | minor % SNDRV_MINOR_DEVICES < SNDRV_MINOR_PCM_PLAYBACK) { | |
1564 | fput(file); | |
1565 | return NULL; | |
1566 | } | |
1567 | return file; | |
1568 | } | |
1569 | ||
1570 | /* | |
1571 | * PCM link handling | |
1572 | */ | |
877211f5 | 1573 | static int snd_pcm_link(struct snd_pcm_substream *substream, int fd) |
1da177e4 LT |
1574 | { |
1575 | int res = 0; | |
1576 | struct file *file; | |
877211f5 TI |
1577 | struct snd_pcm_file *pcm_file; |
1578 | struct snd_pcm_substream *substream1; | |
1da177e4 LT |
1579 | |
1580 | file = snd_pcm_file_fd(fd); | |
1581 | if (!file) | |
1582 | return -EBADFD; | |
1583 | pcm_file = file->private_data; | |
1584 | substream1 = pcm_file->substream; | |
1585 | down_write(&snd_pcm_link_rwsem); | |
1586 | write_lock_irq(&snd_pcm_link_rwlock); | |
1587 | if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN || | |
1588 | substream->runtime->status->state != substream1->runtime->status->state) { | |
1589 | res = -EBADFD; | |
1590 | goto _end; | |
1591 | } | |
1592 | if (snd_pcm_stream_linked(substream1)) { | |
1593 | res = -EALREADY; | |
1594 | goto _end; | |
1595 | } | |
1596 | if (!snd_pcm_stream_linked(substream)) { | |
877211f5 | 1597 | substream->group = kmalloc(sizeof(struct snd_pcm_group), GFP_ATOMIC); |
1da177e4 LT |
1598 | if (substream->group == NULL) { |
1599 | res = -ENOMEM; | |
1600 | goto _end; | |
1601 | } | |
1602 | spin_lock_init(&substream->group->lock); | |
1603 | INIT_LIST_HEAD(&substream->group->substreams); | |
1604 | list_add_tail(&substream->link_list, &substream->group->substreams); | |
1605 | substream->group->count = 1; | |
1606 | } | |
1607 | list_add_tail(&substream1->link_list, &substream->group->substreams); | |
1608 | substream->group->count++; | |
1609 | substream1->group = substream->group; | |
1610 | _end: | |
1611 | write_unlock_irq(&snd_pcm_link_rwlock); | |
1612 | up_write(&snd_pcm_link_rwsem); | |
1613 | fput(file); | |
1614 | return res; | |
1615 | } | |
1616 | ||
877211f5 | 1617 | static void relink_to_local(struct snd_pcm_substream *substream) |
1da177e4 LT |
1618 | { |
1619 | substream->group = &substream->self_group; | |
1620 | INIT_LIST_HEAD(&substream->self_group.substreams); | |
1621 | list_add_tail(&substream->link_list, &substream->self_group.substreams); | |
1622 | } | |
1623 | ||
877211f5 | 1624 | static int snd_pcm_unlink(struct snd_pcm_substream *substream) |
1da177e4 LT |
1625 | { |
1626 | struct list_head *pos; | |
1627 | int res = 0; | |
1628 | ||
1629 | down_write(&snd_pcm_link_rwsem); | |
1630 | write_lock_irq(&snd_pcm_link_rwlock); | |
1631 | if (!snd_pcm_stream_linked(substream)) { | |
1632 | res = -EALREADY; | |
1633 | goto _end; | |
1634 | } | |
1635 | list_del(&substream->link_list); | |
1636 | substream->group->count--; | |
1637 | if (substream->group->count == 1) { /* detach the last stream, too */ | |
1638 | snd_pcm_group_for_each(pos, substream) { | |
1639 | relink_to_local(snd_pcm_group_substream_entry(pos)); | |
1640 | break; | |
1641 | } | |
1642 | kfree(substream->group); | |
1643 | } | |
1644 | relink_to_local(substream); | |
1645 | _end: | |
1646 | write_unlock_irq(&snd_pcm_link_rwlock); | |
1647 | up_write(&snd_pcm_link_rwsem); | |
1648 | return res; | |
1649 | } | |
1650 | ||
1651 | /* | |
1652 | * hw configurator | |
1653 | */ | |
877211f5 TI |
1654 | static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params *params, |
1655 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 1656 | { |
877211f5 | 1657 | struct snd_interval t; |
1da177e4 LT |
1658 | snd_interval_mul(hw_param_interval_c(params, rule->deps[0]), |
1659 | hw_param_interval_c(params, rule->deps[1]), &t); | |
1660 | return snd_interval_refine(hw_param_interval(params, rule->var), &t); | |
1661 | } | |
1662 | ||
877211f5 TI |
1663 | static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params *params, |
1664 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 1665 | { |
877211f5 | 1666 | struct snd_interval t; |
1da177e4 LT |
1667 | snd_interval_div(hw_param_interval_c(params, rule->deps[0]), |
1668 | hw_param_interval_c(params, rule->deps[1]), &t); | |
1669 | return snd_interval_refine(hw_param_interval(params, rule->var), &t); | |
1670 | } | |
1671 | ||
877211f5 TI |
1672 | static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params *params, |
1673 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 1674 | { |
877211f5 | 1675 | struct snd_interval t; |
1da177e4 LT |
1676 | snd_interval_muldivk(hw_param_interval_c(params, rule->deps[0]), |
1677 | hw_param_interval_c(params, rule->deps[1]), | |
1678 | (unsigned long) rule->private, &t); | |
1679 | return snd_interval_refine(hw_param_interval(params, rule->var), &t); | |
1680 | } | |
1681 | ||
877211f5 TI |
1682 | static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params *params, |
1683 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 1684 | { |
877211f5 | 1685 | struct snd_interval t; |
1da177e4 LT |
1686 | snd_interval_mulkdiv(hw_param_interval_c(params, rule->deps[0]), |
1687 | (unsigned long) rule->private, | |
1688 | hw_param_interval_c(params, rule->deps[1]), &t); | |
1689 | return snd_interval_refine(hw_param_interval(params, rule->var), &t); | |
1690 | } | |
1691 | ||
877211f5 TI |
1692 | static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params *params, |
1693 | struct snd_pcm_hw_rule *rule) | |
1da177e4 LT |
1694 | { |
1695 | unsigned int k; | |
877211f5 TI |
1696 | struct snd_interval *i = hw_param_interval(params, rule->deps[0]); |
1697 | struct snd_mask m; | |
1698 | struct snd_mask *mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); | |
1da177e4 LT |
1699 | snd_mask_any(&m); |
1700 | for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) { | |
1701 | int bits; | |
1702 | if (! snd_mask_test(mask, k)) | |
1703 | continue; | |
1704 | bits = snd_pcm_format_physical_width(k); | |
1705 | if (bits <= 0) | |
1706 | continue; /* ignore invalid formats */ | |
1707 | if ((unsigned)bits < i->min || (unsigned)bits > i->max) | |
1708 | snd_mask_reset(&m, k); | |
1709 | } | |
1710 | return snd_mask_refine(mask, &m); | |
1711 | } | |
1712 | ||
877211f5 TI |
1713 | static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params *params, |
1714 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 1715 | { |
877211f5 | 1716 | struct snd_interval t; |
1da177e4 LT |
1717 | unsigned int k; |
1718 | t.min = UINT_MAX; | |
1719 | t.max = 0; | |
1720 | t.openmin = 0; | |
1721 | t.openmax = 0; | |
1722 | for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) { | |
1723 | int bits; | |
1724 | if (! snd_mask_test(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), k)) | |
1725 | continue; | |
1726 | bits = snd_pcm_format_physical_width(k); | |
1727 | if (bits <= 0) | |
1728 | continue; /* ignore invalid formats */ | |
1729 | if (t.min > (unsigned)bits) | |
1730 | t.min = bits; | |
1731 | if (t.max < (unsigned)bits) | |
1732 | t.max = bits; | |
1733 | } | |
1734 | t.integer = 1; | |
1735 | return snd_interval_refine(hw_param_interval(params, rule->var), &t); | |
1736 | } | |
1737 | ||
1738 | #if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12 | |
1739 | #error "Change this table" | |
1740 | #endif | |
1741 | ||
1742 | static unsigned int rates[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100, | |
1743 | 48000, 64000, 88200, 96000, 176400, 192000 }; | |
1744 | ||
877211f5 TI |
1745 | static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params *params, |
1746 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 1747 | { |
877211f5 | 1748 | struct snd_pcm_hardware *hw = rule->private; |
1da177e4 LT |
1749 | return snd_interval_list(hw_param_interval(params, rule->var), |
1750 | ARRAY_SIZE(rates), rates, hw->rates); | |
1751 | } | |
1752 | ||
877211f5 TI |
1753 | static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params *params, |
1754 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 1755 | { |
877211f5 TI |
1756 | struct snd_interval t; |
1757 | struct snd_pcm_substream *substream = rule->private; | |
1da177e4 LT |
1758 | t.min = 0; |
1759 | t.max = substream->buffer_bytes_max; | |
1760 | t.openmin = 0; | |
1761 | t.openmax = 0; | |
1762 | t.integer = 1; | |
1763 | return snd_interval_refine(hw_param_interval(params, rule->var), &t); | |
1764 | } | |
1765 | ||
877211f5 | 1766 | int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream) |
1da177e4 | 1767 | { |
877211f5 TI |
1768 | struct snd_pcm_runtime *runtime = substream->runtime; |
1769 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; | |
1da177e4 LT |
1770 | int k, err; |
1771 | ||
1772 | for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) { | |
1773 | snd_mask_any(constrs_mask(constrs, k)); | |
1774 | } | |
1775 | ||
1776 | for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) { | |
1777 | snd_interval_any(constrs_interval(constrs, k)); | |
1778 | } | |
1779 | ||
1780 | snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS)); | |
1781 | snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE)); | |
1782 | snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES)); | |
1783 | snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS)); | |
1784 | snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS)); | |
1785 | ||
1786 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT, | |
1787 | snd_pcm_hw_rule_format, NULL, | |
1788 | SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); | |
1789 | if (err < 0) | |
1790 | return err; | |
1791 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, | |
1792 | snd_pcm_hw_rule_sample_bits, NULL, | |
1793 | SNDRV_PCM_HW_PARAM_FORMAT, | |
1794 | SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); | |
1795 | if (err < 0) | |
1796 | return err; | |
1797 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, | |
1798 | snd_pcm_hw_rule_div, NULL, | |
1799 | SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1); | |
1800 | if (err < 0) | |
1801 | return err; | |
1802 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, | |
1803 | snd_pcm_hw_rule_mul, NULL, | |
1804 | SNDRV_PCM_HW_PARAM_SAMPLE_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1); | |
1805 | if (err < 0) | |
1806 | return err; | |
1807 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, | |
1808 | snd_pcm_hw_rule_mulkdiv, (void*) 8, | |
1809 | SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1); | |
1810 | if (err < 0) | |
1811 | return err; | |
1812 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, | |
1813 | snd_pcm_hw_rule_mulkdiv, (void*) 8, | |
1814 | SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1); | |
1815 | if (err < 0) | |
1816 | return err; | |
1817 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS, | |
1818 | snd_pcm_hw_rule_div, NULL, | |
1819 | SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); | |
1820 | if (err < 0) | |
1821 | return err; | |
1822 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, | |
1823 | snd_pcm_hw_rule_mulkdiv, (void*) 1000000, | |
1824 | SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, -1); | |
1825 | if (err < 0) | |
1826 | return err; | |
1827 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, | |
1828 | snd_pcm_hw_rule_mulkdiv, (void*) 1000000, | |
1829 | SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_BUFFER_TIME, -1); | |
1830 | if (err < 0) | |
1831 | return err; | |
1832 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS, | |
1833 | snd_pcm_hw_rule_div, NULL, | |
1834 | SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1); | |
1835 | if (err < 0) | |
1836 | return err; | |
1837 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, | |
1838 | snd_pcm_hw_rule_div, NULL, | |
1839 | SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1); | |
1840 | if (err < 0) | |
1841 | return err; | |
1842 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, | |
1843 | snd_pcm_hw_rule_mulkdiv, (void*) 8, | |
1844 | SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); | |
1845 | if (err < 0) | |
1846 | return err; | |
1847 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, | |
1848 | snd_pcm_hw_rule_muldivk, (void*) 1000000, | |
1849 | SNDRV_PCM_HW_PARAM_PERIOD_TIME, SNDRV_PCM_HW_PARAM_RATE, -1); | |
1850 | if (err < 0) | |
1851 | return err; | |
1852 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, | |
1853 | snd_pcm_hw_rule_mul, NULL, | |
1854 | SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1); | |
1855 | if (err < 0) | |
1856 | return err; | |
1857 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, | |
1858 | snd_pcm_hw_rule_mulkdiv, (void*) 8, | |
1859 | SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); | |
1860 | if (err < 0) | |
1861 | return err; | |
1862 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, | |
1863 | snd_pcm_hw_rule_muldivk, (void*) 1000000, | |
1864 | SNDRV_PCM_HW_PARAM_BUFFER_TIME, SNDRV_PCM_HW_PARAM_RATE, -1); | |
1865 | if (err < 0) | |
1866 | return err; | |
1867 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, | |
1868 | snd_pcm_hw_rule_muldivk, (void*) 8, | |
1869 | SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); | |
1870 | if (err < 0) | |
1871 | return err; | |
1872 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, | |
1873 | snd_pcm_hw_rule_muldivk, (void*) 8, | |
1874 | SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); | |
1875 | if (err < 0) | |
1876 | return err; | |
1877 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME, | |
1878 | snd_pcm_hw_rule_mulkdiv, (void*) 1000000, | |
1879 | SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1); | |
1880 | if (err < 0) | |
1881 | return err; | |
1882 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME, | |
1883 | snd_pcm_hw_rule_mulkdiv, (void*) 1000000, | |
1884 | SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1); | |
1885 | if (err < 0) | |
1886 | return err; | |
1887 | return 0; | |
1888 | } | |
1889 | ||
877211f5 | 1890 | int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream) |
1da177e4 | 1891 | { |
877211f5 TI |
1892 | struct snd_pcm_runtime *runtime = substream->runtime; |
1893 | struct snd_pcm_hardware *hw = &runtime->hw; | |
1da177e4 LT |
1894 | int err; |
1895 | unsigned int mask = 0; | |
1896 | ||
1897 | if (hw->info & SNDRV_PCM_INFO_INTERLEAVED) | |
1898 | mask |= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED; | |
1899 | if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED) | |
1900 | mask |= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED; | |
1901 | if (hw->info & SNDRV_PCM_INFO_MMAP) { | |
1902 | if (hw->info & SNDRV_PCM_INFO_INTERLEAVED) | |
1903 | mask |= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED; | |
1904 | if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED) | |
1905 | mask |= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED; | |
1906 | if (hw->info & SNDRV_PCM_INFO_COMPLEX) | |
1907 | mask |= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX; | |
1908 | } | |
1909 | err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask); | |
1910 | snd_assert(err >= 0, return -EINVAL); | |
1911 | ||
1912 | err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats); | |
1913 | snd_assert(err >= 0, return -EINVAL); | |
1914 | ||
1915 | err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT, 1 << SNDRV_PCM_SUBFORMAT_STD); | |
1916 | snd_assert(err >= 0, return -EINVAL); | |
1917 | ||
1918 | err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS, | |
1919 | hw->channels_min, hw->channels_max); | |
1920 | snd_assert(err >= 0, return -EINVAL); | |
1921 | ||
1922 | err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE, | |
1923 | hw->rate_min, hw->rate_max); | |
1924 | snd_assert(err >= 0, return -EINVAL); | |
1925 | ||
1926 | err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, | |
1927 | hw->period_bytes_min, hw->period_bytes_max); | |
1928 | snd_assert(err >= 0, return -EINVAL); | |
1929 | ||
1930 | err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS, | |
1931 | hw->periods_min, hw->periods_max); | |
1932 | snd_assert(err >= 0, return -EINVAL); | |
1933 | ||
1934 | err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, | |
1935 | hw->period_bytes_min, hw->buffer_bytes_max); | |
1936 | snd_assert(err >= 0, return -EINVAL); | |
1937 | ||
1938 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, | |
1939 | snd_pcm_hw_rule_buffer_bytes_max, substream, | |
1940 | SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1); | |
1941 | if (err < 0) | |
1942 | return err; | |
1943 | ||
1944 | /* FIXME: remove */ | |
1945 | if (runtime->dma_bytes) { | |
1946 | err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes); | |
1947 | snd_assert(err >= 0, return -EINVAL); | |
1948 | } | |
1949 | ||
1950 | if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) { | |
1951 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, | |
1952 | snd_pcm_hw_rule_rate, hw, | |
1953 | SNDRV_PCM_HW_PARAM_RATE, -1); | |
1954 | if (err < 0) | |
1955 | return err; | |
1956 | } | |
1957 | ||
1958 | /* FIXME: this belong to lowlevel */ | |
1959 | snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_TICK_TIME, | |
1960 | 1000000 / HZ, 1000000 / HZ); | |
1961 | snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE); | |
1962 | ||
1963 | return 0; | |
1964 | } | |
1965 | ||
877211f5 TI |
1966 | static void snd_pcm_add_file(struct snd_pcm_str *str, |
1967 | struct snd_pcm_file *pcm_file) | |
1da177e4 LT |
1968 | { |
1969 | pcm_file->next = str->files; | |
1970 | str->files = pcm_file; | |
1971 | } | |
1972 | ||
877211f5 TI |
1973 | static void snd_pcm_remove_file(struct snd_pcm_str *str, |
1974 | struct snd_pcm_file *pcm_file) | |
1da177e4 | 1975 | { |
877211f5 | 1976 | struct snd_pcm_file * pcm_file1; |
1da177e4 LT |
1977 | if (str->files == pcm_file) { |
1978 | str->files = pcm_file->next; | |
1979 | } else { | |
1980 | pcm_file1 = str->files; | |
1981 | while (pcm_file1 && pcm_file1->next != pcm_file) | |
1982 | pcm_file1 = pcm_file1->next; | |
1983 | if (pcm_file1 != NULL) | |
1984 | pcm_file1->next = pcm_file->next; | |
1985 | } | |
1986 | } | |
1987 | ||
877211f5 | 1988 | static int snd_pcm_release_file(struct snd_pcm_file * pcm_file) |
1da177e4 | 1989 | { |
877211f5 TI |
1990 | struct snd_pcm_substream *substream; |
1991 | struct snd_pcm_runtime *runtime; | |
1992 | struct snd_pcm_str * str; | |
1da177e4 LT |
1993 | |
1994 | snd_assert(pcm_file != NULL, return -ENXIO); | |
1995 | substream = pcm_file->substream; | |
1996 | snd_assert(substream != NULL, return -ENXIO); | |
1997 | runtime = substream->runtime; | |
1998 | str = substream->pstr; | |
1999 | snd_pcm_unlink(substream); | |
443feb88 | 2000 | if (substream->ffile != NULL) { |
1da177e4 LT |
2001 | if (substream->ops->hw_free != NULL) |
2002 | substream->ops->hw_free(substream); | |
2003 | substream->ops->close(substream); | |
443feb88 | 2004 | substream->ffile = NULL; |
1da177e4 | 2005 | } |
1da177e4 LT |
2006 | snd_pcm_remove_file(str, pcm_file); |
2007 | snd_pcm_release_substream(substream); | |
2008 | kfree(pcm_file); | |
2009 | return 0; | |
2010 | } | |
2011 | ||
2012 | static int snd_pcm_open_file(struct file *file, | |
877211f5 | 2013 | struct snd_pcm *pcm, |
1da177e4 | 2014 | int stream, |
877211f5 | 2015 | struct snd_pcm_file **rpcm_file) |
1da177e4 LT |
2016 | { |
2017 | int err = 0; | |
877211f5 TI |
2018 | struct snd_pcm_file *pcm_file; |
2019 | struct snd_pcm_substream *substream; | |
2020 | struct snd_pcm_str *str; | |
1da177e4 LT |
2021 | |
2022 | snd_assert(rpcm_file != NULL, return -EINVAL); | |
2023 | *rpcm_file = NULL; | |
2024 | ||
ca2c0966 | 2025 | pcm_file = kzalloc(sizeof(*pcm_file), GFP_KERNEL); |
1da177e4 LT |
2026 | if (pcm_file == NULL) { |
2027 | return -ENOMEM; | |
2028 | } | |
2029 | ||
2030 | if ((err = snd_pcm_open_substream(pcm, stream, &substream)) < 0) { | |
2031 | kfree(pcm_file); | |
2032 | return err; | |
2033 | } | |
2034 | ||
2035 | str = substream->pstr; | |
2036 | substream->file = pcm_file; | |
2037 | substream->no_mmap_ctrl = 0; | |
2038 | ||
2039 | pcm_file->substream = substream; | |
2040 | ||
2041 | snd_pcm_add_file(str, pcm_file); | |
2042 | ||
2043 | err = snd_pcm_hw_constraints_init(substream); | |
2044 | if (err < 0) { | |
2045 | snd_printd("snd_pcm_hw_constraints_init failed\n"); | |
2046 | snd_pcm_release_file(pcm_file); | |
2047 | return err; | |
2048 | } | |
2049 | ||
2050 | if ((err = substream->ops->open(substream)) < 0) { | |
2051 | snd_pcm_release_file(pcm_file); | |
2052 | return err; | |
2053 | } | |
443feb88 | 2054 | substream->ffile = file; |
1da177e4 LT |
2055 | |
2056 | err = snd_pcm_hw_constraints_complete(substream); | |
2057 | if (err < 0) { | |
2058 | snd_printd("snd_pcm_hw_constraints_complete failed\n"); | |
1da177e4 LT |
2059 | snd_pcm_release_file(pcm_file); |
2060 | return err; | |
2061 | } | |
2062 | ||
1da177e4 LT |
2063 | file->private_data = pcm_file; |
2064 | *rpcm_file = pcm_file; | |
2065 | return 0; | |
2066 | } | |
2067 | ||
2068 | static int snd_pcm_open(struct inode *inode, struct file *file) | |
2069 | { | |
2070 | int cardnum = SNDRV_MINOR_CARD(iminor(inode)); | |
2071 | int device = SNDRV_MINOR_DEVICE(iminor(inode)); | |
2072 | int err; | |
877211f5 TI |
2073 | struct snd_pcm *pcm; |
2074 | struct snd_pcm_file *pcm_file; | |
1da177e4 LT |
2075 | wait_queue_t wait; |
2076 | ||
7c22f1aa TI |
2077 | if (device < SNDRV_MINOR_PCM_PLAYBACK || device >= SNDRV_MINOR_DEVICES) |
2078 | return -ENXIO; | |
1da177e4 LT |
2079 | pcm = snd_pcm_devices[(cardnum * SNDRV_PCM_DEVICES) + (device % SNDRV_MINOR_PCMS)]; |
2080 | if (pcm == NULL) { | |
2081 | err = -ENODEV; | |
2082 | goto __error1; | |
2083 | } | |
2084 | err = snd_card_file_add(pcm->card, file); | |
2085 | if (err < 0) | |
2086 | goto __error1; | |
2087 | if (!try_module_get(pcm->card->module)) { | |
2088 | err = -EFAULT; | |
2089 | goto __error2; | |
2090 | } | |
2091 | init_waitqueue_entry(&wait, current); | |
2092 | add_wait_queue(&pcm->open_wait, &wait); | |
2093 | down(&pcm->open_mutex); | |
2094 | while (1) { | |
2095 | err = snd_pcm_open_file(file, pcm, device >= SNDRV_MINOR_PCM_CAPTURE ? SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK, &pcm_file); | |
2096 | if (err >= 0) | |
2097 | break; | |
2098 | if (err == -EAGAIN) { | |
2099 | if (file->f_flags & O_NONBLOCK) { | |
2100 | err = -EBUSY; | |
2101 | break; | |
2102 | } | |
2103 | } else | |
2104 | break; | |
2105 | set_current_state(TASK_INTERRUPTIBLE); | |
2106 | up(&pcm->open_mutex); | |
2107 | schedule(); | |
2108 | down(&pcm->open_mutex); | |
2109 | if (signal_pending(current)) { | |
2110 | err = -ERESTARTSYS; | |
2111 | break; | |
2112 | } | |
2113 | } | |
2114 | remove_wait_queue(&pcm->open_wait, &wait); | |
2115 | up(&pcm->open_mutex); | |
2116 | if (err < 0) | |
2117 | goto __error; | |
2118 | return err; | |
2119 | ||
2120 | __error: | |
2121 | module_put(pcm->card->module); | |
2122 | __error2: | |
2123 | snd_card_file_remove(pcm->card, file); | |
2124 | __error1: | |
2125 | return err; | |
2126 | } | |
2127 | ||
2128 | static int snd_pcm_release(struct inode *inode, struct file *file) | |
2129 | { | |
877211f5 TI |
2130 | struct snd_pcm *pcm; |
2131 | struct snd_pcm_substream *substream; | |
2132 | struct snd_pcm_file *pcm_file; | |
1da177e4 LT |
2133 | |
2134 | pcm_file = file->private_data; | |
2135 | substream = pcm_file->substream; | |
2136 | snd_assert(substream != NULL, return -ENXIO); | |
2137 | snd_assert(!atomic_read(&substream->runtime->mmap_count), ); | |
2138 | pcm = substream->pcm; | |
2139 | snd_pcm_drop(substream); | |
2140 | fasync_helper(-1, file, 0, &substream->runtime->fasync); | |
2141 | down(&pcm->open_mutex); | |
2142 | snd_pcm_release_file(pcm_file); | |
2143 | up(&pcm->open_mutex); | |
2144 | wake_up(&pcm->open_wait); | |
2145 | module_put(pcm->card->module); | |
2146 | snd_card_file_remove(pcm->card, file); | |
2147 | return 0; | |
2148 | } | |
2149 | ||
877211f5 TI |
2150 | static snd_pcm_sframes_t snd_pcm_playback_rewind(struct snd_pcm_substream *substream, |
2151 | snd_pcm_uframes_t frames) | |
1da177e4 | 2152 | { |
877211f5 | 2153 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
2154 | snd_pcm_sframes_t appl_ptr; |
2155 | snd_pcm_sframes_t ret; | |
2156 | snd_pcm_sframes_t hw_avail; | |
2157 | ||
2158 | if (frames == 0) | |
2159 | return 0; | |
2160 | ||
2161 | snd_pcm_stream_lock_irq(substream); | |
2162 | switch (runtime->status->state) { | |
2163 | case SNDRV_PCM_STATE_PREPARED: | |
2164 | break; | |
2165 | case SNDRV_PCM_STATE_DRAINING: | |
2166 | case SNDRV_PCM_STATE_RUNNING: | |
2167 | if (snd_pcm_update_hw_ptr(substream) >= 0) | |
2168 | break; | |
2169 | /* Fall through */ | |
2170 | case SNDRV_PCM_STATE_XRUN: | |
2171 | ret = -EPIPE; | |
2172 | goto __end; | |
2173 | default: | |
2174 | ret = -EBADFD; | |
2175 | goto __end; | |
2176 | } | |
2177 | ||
2178 | hw_avail = snd_pcm_playback_hw_avail(runtime); | |
2179 | if (hw_avail <= 0) { | |
2180 | ret = 0; | |
2181 | goto __end; | |
2182 | } | |
2183 | if (frames > (snd_pcm_uframes_t)hw_avail) | |
2184 | frames = hw_avail; | |
2185 | else | |
2186 | frames -= frames % runtime->xfer_align; | |
2187 | appl_ptr = runtime->control->appl_ptr - frames; | |
2188 | if (appl_ptr < 0) | |
2189 | appl_ptr += runtime->boundary; | |
2190 | runtime->control->appl_ptr = appl_ptr; | |
2191 | if (runtime->status->state == SNDRV_PCM_STATE_RUNNING && | |
2192 | runtime->sleep_min) | |
2193 | snd_pcm_tick_prepare(substream); | |
2194 | ret = frames; | |
2195 | __end: | |
2196 | snd_pcm_stream_unlock_irq(substream); | |
2197 | return ret; | |
2198 | } | |
2199 | ||
877211f5 TI |
2200 | static snd_pcm_sframes_t snd_pcm_capture_rewind(struct snd_pcm_substream *substream, |
2201 | snd_pcm_uframes_t frames) | |
1da177e4 | 2202 | { |
877211f5 | 2203 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
2204 | snd_pcm_sframes_t appl_ptr; |
2205 | snd_pcm_sframes_t ret; | |
2206 | snd_pcm_sframes_t hw_avail; | |
2207 | ||
2208 | if (frames == 0) | |
2209 | return 0; | |
2210 | ||
2211 | snd_pcm_stream_lock_irq(substream); | |
2212 | switch (runtime->status->state) { | |
2213 | case SNDRV_PCM_STATE_PREPARED: | |
2214 | case SNDRV_PCM_STATE_DRAINING: | |
2215 | break; | |
2216 | case SNDRV_PCM_STATE_RUNNING: | |
2217 | if (snd_pcm_update_hw_ptr(substream) >= 0) | |
2218 | break; | |
2219 | /* Fall through */ | |
2220 | case SNDRV_PCM_STATE_XRUN: | |
2221 | ret = -EPIPE; | |
2222 | goto __end; | |
2223 | default: | |
2224 | ret = -EBADFD; | |
2225 | goto __end; | |
2226 | } | |
2227 | ||
2228 | hw_avail = snd_pcm_capture_hw_avail(runtime); | |
2229 | if (hw_avail <= 0) { | |
2230 | ret = 0; | |
2231 | goto __end; | |
2232 | } | |
2233 | if (frames > (snd_pcm_uframes_t)hw_avail) | |
2234 | frames = hw_avail; | |
2235 | else | |
2236 | frames -= frames % runtime->xfer_align; | |
2237 | appl_ptr = runtime->control->appl_ptr - frames; | |
2238 | if (appl_ptr < 0) | |
2239 | appl_ptr += runtime->boundary; | |
2240 | runtime->control->appl_ptr = appl_ptr; | |
2241 | if (runtime->status->state == SNDRV_PCM_STATE_RUNNING && | |
2242 | runtime->sleep_min) | |
2243 | snd_pcm_tick_prepare(substream); | |
2244 | ret = frames; | |
2245 | __end: | |
2246 | snd_pcm_stream_unlock_irq(substream); | |
2247 | return ret; | |
2248 | } | |
2249 | ||
877211f5 TI |
2250 | static snd_pcm_sframes_t snd_pcm_playback_forward(struct snd_pcm_substream *substream, |
2251 | snd_pcm_uframes_t frames) | |
1da177e4 | 2252 | { |
877211f5 | 2253 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
2254 | snd_pcm_sframes_t appl_ptr; |
2255 | snd_pcm_sframes_t ret; | |
2256 | snd_pcm_sframes_t avail; | |
2257 | ||
2258 | if (frames == 0) | |
2259 | return 0; | |
2260 | ||
2261 | snd_pcm_stream_lock_irq(substream); | |
2262 | switch (runtime->status->state) { | |
2263 | case SNDRV_PCM_STATE_PREPARED: | |
2264 | case SNDRV_PCM_STATE_PAUSED: | |
2265 | break; | |
2266 | case SNDRV_PCM_STATE_DRAINING: | |
2267 | case SNDRV_PCM_STATE_RUNNING: | |
2268 | if (snd_pcm_update_hw_ptr(substream) >= 0) | |
2269 | break; | |
2270 | /* Fall through */ | |
2271 | case SNDRV_PCM_STATE_XRUN: | |
2272 | ret = -EPIPE; | |
2273 | goto __end; | |
2274 | default: | |
2275 | ret = -EBADFD; | |
2276 | goto __end; | |
2277 | } | |
2278 | ||
2279 | avail = snd_pcm_playback_avail(runtime); | |
2280 | if (avail <= 0) { | |
2281 | ret = 0; | |
2282 | goto __end; | |
2283 | } | |
2284 | if (frames > (snd_pcm_uframes_t)avail) | |
2285 | frames = avail; | |
2286 | else | |
2287 | frames -= frames % runtime->xfer_align; | |
2288 | appl_ptr = runtime->control->appl_ptr + frames; | |
2289 | if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary) | |
2290 | appl_ptr -= runtime->boundary; | |
2291 | runtime->control->appl_ptr = appl_ptr; | |
2292 | if (runtime->status->state == SNDRV_PCM_STATE_RUNNING && | |
2293 | runtime->sleep_min) | |
2294 | snd_pcm_tick_prepare(substream); | |
2295 | ret = frames; | |
2296 | __end: | |
2297 | snd_pcm_stream_unlock_irq(substream); | |
2298 | return ret; | |
2299 | } | |
2300 | ||
877211f5 TI |
2301 | static snd_pcm_sframes_t snd_pcm_capture_forward(struct snd_pcm_substream *substream, |
2302 | snd_pcm_uframes_t frames) | |
1da177e4 | 2303 | { |
877211f5 | 2304 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
2305 | snd_pcm_sframes_t appl_ptr; |
2306 | snd_pcm_sframes_t ret; | |
2307 | snd_pcm_sframes_t avail; | |
2308 | ||
2309 | if (frames == 0) | |
2310 | return 0; | |
2311 | ||
2312 | snd_pcm_stream_lock_irq(substream); | |
2313 | switch (runtime->status->state) { | |
2314 | case SNDRV_PCM_STATE_PREPARED: | |
2315 | case SNDRV_PCM_STATE_DRAINING: | |
2316 | case SNDRV_PCM_STATE_PAUSED: | |
2317 | break; | |
2318 | case SNDRV_PCM_STATE_RUNNING: | |
2319 | if (snd_pcm_update_hw_ptr(substream) >= 0) | |
2320 | break; | |
2321 | /* Fall through */ | |
2322 | case SNDRV_PCM_STATE_XRUN: | |
2323 | ret = -EPIPE; | |
2324 | goto __end; | |
2325 | default: | |
2326 | ret = -EBADFD; | |
2327 | goto __end; | |
2328 | } | |
2329 | ||
2330 | avail = snd_pcm_capture_avail(runtime); | |
2331 | if (avail <= 0) { | |
2332 | ret = 0; | |
2333 | goto __end; | |
2334 | } | |
2335 | if (frames > (snd_pcm_uframes_t)avail) | |
2336 | frames = avail; | |
2337 | else | |
2338 | frames -= frames % runtime->xfer_align; | |
2339 | appl_ptr = runtime->control->appl_ptr + frames; | |
2340 | if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary) | |
2341 | appl_ptr -= runtime->boundary; | |
2342 | runtime->control->appl_ptr = appl_ptr; | |
2343 | if (runtime->status->state == SNDRV_PCM_STATE_RUNNING && | |
2344 | runtime->sleep_min) | |
2345 | snd_pcm_tick_prepare(substream); | |
2346 | ret = frames; | |
2347 | __end: | |
2348 | snd_pcm_stream_unlock_irq(substream); | |
2349 | return ret; | |
2350 | } | |
2351 | ||
877211f5 | 2352 | static int snd_pcm_hwsync(struct snd_pcm_substream *substream) |
1da177e4 | 2353 | { |
877211f5 | 2354 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
2355 | int err; |
2356 | ||
2357 | snd_pcm_stream_lock_irq(substream); | |
2358 | switch (runtime->status->state) { | |
2359 | case SNDRV_PCM_STATE_DRAINING: | |
2360 | if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) | |
2361 | goto __badfd; | |
2362 | case SNDRV_PCM_STATE_RUNNING: | |
2363 | if ((err = snd_pcm_update_hw_ptr(substream)) < 0) | |
2364 | break; | |
2365 | /* Fall through */ | |
2366 | case SNDRV_PCM_STATE_PREPARED: | |
2367 | case SNDRV_PCM_STATE_SUSPENDED: | |
2368 | err = 0; | |
2369 | break; | |
2370 | case SNDRV_PCM_STATE_XRUN: | |
2371 | err = -EPIPE; | |
2372 | break; | |
2373 | default: | |
2374 | __badfd: | |
2375 | err = -EBADFD; | |
2376 | break; | |
2377 | } | |
2378 | snd_pcm_stream_unlock_irq(substream); | |
2379 | return err; | |
2380 | } | |
2381 | ||
877211f5 TI |
2382 | static int snd_pcm_delay(struct snd_pcm_substream *substream, |
2383 | snd_pcm_sframes_t __user *res) | |
1da177e4 | 2384 | { |
877211f5 | 2385 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
2386 | int err; |
2387 | snd_pcm_sframes_t n = 0; | |
2388 | ||
2389 | snd_pcm_stream_lock_irq(substream); | |
2390 | switch (runtime->status->state) { | |
2391 | case SNDRV_PCM_STATE_DRAINING: | |
2392 | if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) | |
2393 | goto __badfd; | |
2394 | case SNDRV_PCM_STATE_RUNNING: | |
2395 | if ((err = snd_pcm_update_hw_ptr(substream)) < 0) | |
2396 | break; | |
2397 | /* Fall through */ | |
2398 | case SNDRV_PCM_STATE_PREPARED: | |
2399 | case SNDRV_PCM_STATE_SUSPENDED: | |
2400 | err = 0; | |
2401 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) | |
2402 | n = snd_pcm_playback_hw_avail(runtime); | |
2403 | else | |
2404 | n = snd_pcm_capture_avail(runtime); | |
2405 | break; | |
2406 | case SNDRV_PCM_STATE_XRUN: | |
2407 | err = -EPIPE; | |
2408 | break; | |
2409 | default: | |
2410 | __badfd: | |
2411 | err = -EBADFD; | |
2412 | break; | |
2413 | } | |
2414 | snd_pcm_stream_unlock_irq(substream); | |
2415 | if (!err) | |
2416 | if (put_user(n, res)) | |
2417 | err = -EFAULT; | |
2418 | return err; | |
2419 | } | |
2420 | ||
877211f5 TI |
2421 | static int snd_pcm_sync_ptr(struct snd_pcm_substream *substream, |
2422 | struct snd_pcm_sync_ptr __user *_sync_ptr) | |
1da177e4 | 2423 | { |
877211f5 TI |
2424 | struct snd_pcm_runtime *runtime = substream->runtime; |
2425 | struct snd_pcm_sync_ptr sync_ptr; | |
2426 | volatile struct snd_pcm_mmap_status *status; | |
2427 | volatile struct snd_pcm_mmap_control *control; | |
1da177e4 LT |
2428 | int err; |
2429 | ||
2430 | memset(&sync_ptr, 0, sizeof(sync_ptr)); | |
2431 | if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags))) | |
2432 | return -EFAULT; | |
877211f5 | 2433 | if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct snd_pcm_mmap_control))) |
1da177e4 LT |
2434 | return -EFAULT; |
2435 | status = runtime->status; | |
2436 | control = runtime->control; | |
2437 | if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) { | |
2438 | err = snd_pcm_hwsync(substream); | |
2439 | if (err < 0) | |
2440 | return err; | |
2441 | } | |
2442 | snd_pcm_stream_lock_irq(substream); | |
2443 | if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL)) | |
2444 | control->appl_ptr = sync_ptr.c.control.appl_ptr; | |
2445 | else | |
2446 | sync_ptr.c.control.appl_ptr = control->appl_ptr; | |
2447 | if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN)) | |
2448 | control->avail_min = sync_ptr.c.control.avail_min; | |
2449 | else | |
2450 | sync_ptr.c.control.avail_min = control->avail_min; | |
2451 | sync_ptr.s.status.state = status->state; | |
2452 | sync_ptr.s.status.hw_ptr = status->hw_ptr; | |
2453 | sync_ptr.s.status.tstamp = status->tstamp; | |
2454 | sync_ptr.s.status.suspended_state = status->suspended_state; | |
2455 | snd_pcm_stream_unlock_irq(substream); | |
2456 | if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr))) | |
2457 | return -EFAULT; | |
2458 | return 0; | |
2459 | } | |
2460 | ||
877211f5 | 2461 | static int snd_pcm_playback_ioctl1(struct snd_pcm_substream *substream, |
1da177e4 | 2462 | unsigned int cmd, void __user *arg); |
877211f5 | 2463 | static int snd_pcm_capture_ioctl1(struct snd_pcm_substream *substream, |
1da177e4 LT |
2464 | unsigned int cmd, void __user *arg); |
2465 | ||
877211f5 | 2466 | static int snd_pcm_common_ioctl1(struct snd_pcm_substream *substream, |
1da177e4 LT |
2467 | unsigned int cmd, void __user *arg) |
2468 | { | |
2469 | snd_assert(substream != NULL, return -ENXIO); | |
2470 | ||
2471 | switch (cmd) { | |
2472 | case SNDRV_PCM_IOCTL_PVERSION: | |
2473 | return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0; | |
2474 | case SNDRV_PCM_IOCTL_INFO: | |
2475 | return snd_pcm_info_user(substream, arg); | |
07799e75 | 2476 | case SNDRV_PCM_IOCTL_TSTAMP: /* just for compatibility */ |
1da177e4 | 2477 | return 0; |
1da177e4 LT |
2478 | case SNDRV_PCM_IOCTL_HW_REFINE: |
2479 | return snd_pcm_hw_refine_user(substream, arg); | |
2480 | case SNDRV_PCM_IOCTL_HW_PARAMS: | |
2481 | return snd_pcm_hw_params_user(substream, arg); | |
2482 | case SNDRV_PCM_IOCTL_HW_FREE: | |
2483 | return snd_pcm_hw_free(substream); | |
2484 | case SNDRV_PCM_IOCTL_SW_PARAMS: | |
2485 | return snd_pcm_sw_params_user(substream, arg); | |
2486 | case SNDRV_PCM_IOCTL_STATUS: | |
2487 | return snd_pcm_status_user(substream, arg); | |
2488 | case SNDRV_PCM_IOCTL_CHANNEL_INFO: | |
2489 | return snd_pcm_channel_info_user(substream, arg); | |
2490 | case SNDRV_PCM_IOCTL_PREPARE: | |
2491 | return snd_pcm_prepare(substream); | |
2492 | case SNDRV_PCM_IOCTL_RESET: | |
2493 | return snd_pcm_reset(substream); | |
2494 | case SNDRV_PCM_IOCTL_START: | |
2495 | return snd_pcm_action_lock_irq(&snd_pcm_action_start, substream, SNDRV_PCM_STATE_RUNNING); | |
2496 | case SNDRV_PCM_IOCTL_LINK: | |
2497 | return snd_pcm_link(substream, (int)(unsigned long) arg); | |
2498 | case SNDRV_PCM_IOCTL_UNLINK: | |
2499 | return snd_pcm_unlink(substream); | |
2500 | case SNDRV_PCM_IOCTL_RESUME: | |
2501 | return snd_pcm_resume(substream); | |
2502 | case SNDRV_PCM_IOCTL_XRUN: | |
2503 | return snd_pcm_xrun(substream); | |
2504 | case SNDRV_PCM_IOCTL_HWSYNC: | |
2505 | return snd_pcm_hwsync(substream); | |
2506 | case SNDRV_PCM_IOCTL_DELAY: | |
2507 | return snd_pcm_delay(substream, arg); | |
2508 | case SNDRV_PCM_IOCTL_SYNC_PTR: | |
2509 | return snd_pcm_sync_ptr(substream, arg); | |
2510 | case SNDRV_PCM_IOCTL_HW_REFINE_OLD: | |
2511 | return snd_pcm_hw_refine_old_user(substream, arg); | |
2512 | case SNDRV_PCM_IOCTL_HW_PARAMS_OLD: | |
2513 | return snd_pcm_hw_params_old_user(substream, arg); | |
2514 | case SNDRV_PCM_IOCTL_DRAIN: | |
2515 | return snd_pcm_drain(substream); | |
2516 | case SNDRV_PCM_IOCTL_DROP: | |
2517 | return snd_pcm_drop(substream); | |
2518 | } | |
2519 | snd_printd("unknown ioctl = 0x%x\n", cmd); | |
2520 | return -ENOTTY; | |
2521 | } | |
2522 | ||
877211f5 | 2523 | static int snd_pcm_playback_ioctl1(struct snd_pcm_substream *substream, |
1da177e4 LT |
2524 | unsigned int cmd, void __user *arg) |
2525 | { | |
2526 | snd_assert(substream != NULL, return -ENXIO); | |
2527 | snd_assert(substream->stream == SNDRV_PCM_STREAM_PLAYBACK, return -EINVAL); | |
2528 | switch (cmd) { | |
2529 | case SNDRV_PCM_IOCTL_WRITEI_FRAMES: | |
2530 | { | |
877211f5 TI |
2531 | struct snd_xferi xferi; |
2532 | struct snd_xferi __user *_xferi = arg; | |
2533 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1da177e4 LT |
2534 | snd_pcm_sframes_t result; |
2535 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) | |
2536 | return -EBADFD; | |
2537 | if (put_user(0, &_xferi->result)) | |
2538 | return -EFAULT; | |
2539 | if (copy_from_user(&xferi, _xferi, sizeof(xferi))) | |
2540 | return -EFAULT; | |
2541 | result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames); | |
2542 | __put_user(result, &_xferi->result); | |
2543 | return result < 0 ? result : 0; | |
2544 | } | |
2545 | case SNDRV_PCM_IOCTL_WRITEN_FRAMES: | |
2546 | { | |
877211f5 TI |
2547 | struct snd_xfern xfern; |
2548 | struct snd_xfern __user *_xfern = arg; | |
2549 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1da177e4 LT |
2550 | void __user **bufs; |
2551 | snd_pcm_sframes_t result; | |
2552 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) | |
2553 | return -EBADFD; | |
2554 | if (runtime->channels > 128) | |
2555 | return -EINVAL; | |
2556 | if (put_user(0, &_xfern->result)) | |
2557 | return -EFAULT; | |
2558 | if (copy_from_user(&xfern, _xfern, sizeof(xfern))) | |
2559 | return -EFAULT; | |
2560 | bufs = kmalloc(sizeof(void *) * runtime->channels, GFP_KERNEL); | |
2561 | if (bufs == NULL) | |
2562 | return -ENOMEM; | |
2563 | if (copy_from_user(bufs, xfern.bufs, sizeof(void *) * runtime->channels)) { | |
2564 | kfree(bufs); | |
2565 | return -EFAULT; | |
2566 | } | |
2567 | result = snd_pcm_lib_writev(substream, bufs, xfern.frames); | |
2568 | kfree(bufs); | |
2569 | __put_user(result, &_xfern->result); | |
2570 | return result < 0 ? result : 0; | |
2571 | } | |
2572 | case SNDRV_PCM_IOCTL_REWIND: | |
2573 | { | |
2574 | snd_pcm_uframes_t frames; | |
2575 | snd_pcm_uframes_t __user *_frames = arg; | |
2576 | snd_pcm_sframes_t result; | |
2577 | if (get_user(frames, _frames)) | |
2578 | return -EFAULT; | |
2579 | if (put_user(0, _frames)) | |
2580 | return -EFAULT; | |
2581 | result = snd_pcm_playback_rewind(substream, frames); | |
2582 | __put_user(result, _frames); | |
2583 | return result < 0 ? result : 0; | |
2584 | } | |
2585 | case SNDRV_PCM_IOCTL_FORWARD: | |
2586 | { | |
2587 | snd_pcm_uframes_t frames; | |
2588 | snd_pcm_uframes_t __user *_frames = arg; | |
2589 | snd_pcm_sframes_t result; | |
2590 | if (get_user(frames, _frames)) | |
2591 | return -EFAULT; | |
2592 | if (put_user(0, _frames)) | |
2593 | return -EFAULT; | |
2594 | result = snd_pcm_playback_forward(substream, frames); | |
2595 | __put_user(result, _frames); | |
2596 | return result < 0 ? result : 0; | |
2597 | } | |
2598 | case SNDRV_PCM_IOCTL_PAUSE: | |
2599 | { | |
2600 | int res; | |
2601 | snd_pcm_stream_lock_irq(substream); | |
2602 | res = snd_pcm_pause(substream, (int)(unsigned long)arg); | |
2603 | snd_pcm_stream_unlock_irq(substream); | |
2604 | return res; | |
2605 | } | |
2606 | } | |
2607 | return snd_pcm_common_ioctl1(substream, cmd, arg); | |
2608 | } | |
2609 | ||
877211f5 | 2610 | static int snd_pcm_capture_ioctl1(struct snd_pcm_substream *substream, |
1da177e4 LT |
2611 | unsigned int cmd, void __user *arg) |
2612 | { | |
2613 | snd_assert(substream != NULL, return -ENXIO); | |
2614 | snd_assert(substream->stream == SNDRV_PCM_STREAM_CAPTURE, return -EINVAL); | |
2615 | switch (cmd) { | |
2616 | case SNDRV_PCM_IOCTL_READI_FRAMES: | |
2617 | { | |
877211f5 TI |
2618 | struct snd_xferi xferi; |
2619 | struct snd_xferi __user *_xferi = arg; | |
2620 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1da177e4 LT |
2621 | snd_pcm_sframes_t result; |
2622 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) | |
2623 | return -EBADFD; | |
2624 | if (put_user(0, &_xferi->result)) | |
2625 | return -EFAULT; | |
2626 | if (copy_from_user(&xferi, _xferi, sizeof(xferi))) | |
2627 | return -EFAULT; | |
2628 | result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames); | |
2629 | __put_user(result, &_xferi->result); | |
2630 | return result < 0 ? result : 0; | |
2631 | } | |
2632 | case SNDRV_PCM_IOCTL_READN_FRAMES: | |
2633 | { | |
877211f5 TI |
2634 | struct snd_xfern xfern; |
2635 | struct snd_xfern __user *_xfern = arg; | |
2636 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1da177e4 LT |
2637 | void *bufs; |
2638 | snd_pcm_sframes_t result; | |
2639 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) | |
2640 | return -EBADFD; | |
2641 | if (runtime->channels > 128) | |
2642 | return -EINVAL; | |
2643 | if (put_user(0, &_xfern->result)) | |
2644 | return -EFAULT; | |
2645 | if (copy_from_user(&xfern, _xfern, sizeof(xfern))) | |
2646 | return -EFAULT; | |
2647 | bufs = kmalloc(sizeof(void *) * runtime->channels, GFP_KERNEL); | |
2648 | if (bufs == NULL) | |
2649 | return -ENOMEM; | |
2650 | if (copy_from_user(bufs, xfern.bufs, sizeof(void *) * runtime->channels)) { | |
2651 | kfree(bufs); | |
2652 | return -EFAULT; | |
2653 | } | |
2654 | result = snd_pcm_lib_readv(substream, bufs, xfern.frames); | |
2655 | kfree(bufs); | |
2656 | __put_user(result, &_xfern->result); | |
2657 | return result < 0 ? result : 0; | |
2658 | } | |
2659 | case SNDRV_PCM_IOCTL_REWIND: | |
2660 | { | |
2661 | snd_pcm_uframes_t frames; | |
2662 | snd_pcm_uframes_t __user *_frames = arg; | |
2663 | snd_pcm_sframes_t result; | |
2664 | if (get_user(frames, _frames)) | |
2665 | return -EFAULT; | |
2666 | if (put_user(0, _frames)) | |
2667 | return -EFAULT; | |
2668 | result = snd_pcm_capture_rewind(substream, frames); | |
2669 | __put_user(result, _frames); | |
2670 | return result < 0 ? result : 0; | |
2671 | } | |
2672 | case SNDRV_PCM_IOCTL_FORWARD: | |
2673 | { | |
2674 | snd_pcm_uframes_t frames; | |
2675 | snd_pcm_uframes_t __user *_frames = arg; | |
2676 | snd_pcm_sframes_t result; | |
2677 | if (get_user(frames, _frames)) | |
2678 | return -EFAULT; | |
2679 | if (put_user(0, _frames)) | |
2680 | return -EFAULT; | |
2681 | result = snd_pcm_capture_forward(substream, frames); | |
2682 | __put_user(result, _frames); | |
2683 | return result < 0 ? result : 0; | |
2684 | } | |
2685 | } | |
2686 | return snd_pcm_common_ioctl1(substream, cmd, arg); | |
2687 | } | |
2688 | ||
877211f5 TI |
2689 | static long snd_pcm_playback_ioctl(struct file *file, unsigned int cmd, |
2690 | unsigned long arg) | |
1da177e4 | 2691 | { |
877211f5 | 2692 | struct snd_pcm_file *pcm_file; |
1da177e4 LT |
2693 | |
2694 | pcm_file = file->private_data; | |
2695 | ||
2696 | if (((cmd >> 8) & 0xff) != 'A') | |
2697 | return -ENOTTY; | |
2698 | ||
2699 | return snd_pcm_playback_ioctl1(pcm_file->substream, cmd, (void __user *)arg); | |
2700 | } | |
2701 | ||
877211f5 TI |
2702 | static long snd_pcm_capture_ioctl(struct file *file, unsigned int cmd, |
2703 | unsigned long arg) | |
1da177e4 | 2704 | { |
877211f5 | 2705 | struct snd_pcm_file *pcm_file; |
1da177e4 LT |
2706 | |
2707 | pcm_file = file->private_data; | |
2708 | ||
2709 | if (((cmd >> 8) & 0xff) != 'A') | |
2710 | return -ENOTTY; | |
2711 | ||
2712 | return snd_pcm_capture_ioctl1(pcm_file->substream, cmd, (void __user *)arg); | |
2713 | } | |
2714 | ||
877211f5 | 2715 | int snd_pcm_kernel_playback_ioctl(struct snd_pcm_substream *substream, |
1da177e4 LT |
2716 | unsigned int cmd, void *arg) |
2717 | { | |
2718 | mm_segment_t fs; | |
2719 | int result; | |
2720 | ||
2721 | fs = snd_enter_user(); | |
2722 | result = snd_pcm_playback_ioctl1(substream, cmd, (void __user *)arg); | |
2723 | snd_leave_user(fs); | |
2724 | return result; | |
2725 | } | |
2726 | ||
877211f5 | 2727 | int snd_pcm_kernel_capture_ioctl(struct snd_pcm_substream *substream, |
1da177e4 LT |
2728 | unsigned int cmd, void *arg) |
2729 | { | |
2730 | mm_segment_t fs; | |
2731 | int result; | |
2732 | ||
2733 | fs = snd_enter_user(); | |
2734 | result = snd_pcm_capture_ioctl1(substream, cmd, (void __user *)arg); | |
2735 | snd_leave_user(fs); | |
2736 | return result; | |
2737 | } | |
2738 | ||
877211f5 | 2739 | int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream, |
1da177e4 LT |
2740 | unsigned int cmd, void *arg) |
2741 | { | |
2742 | switch (substream->stream) { | |
2743 | case SNDRV_PCM_STREAM_PLAYBACK: | |
2744 | return snd_pcm_kernel_playback_ioctl(substream, cmd, arg); | |
2745 | case SNDRV_PCM_STREAM_CAPTURE: | |
2746 | return snd_pcm_kernel_capture_ioctl(substream, cmd, arg); | |
2747 | default: | |
2748 | return -EINVAL; | |
2749 | } | |
2750 | } | |
2751 | ||
877211f5 TI |
2752 | static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count, |
2753 | loff_t * offset) | |
1da177e4 | 2754 | { |
877211f5 TI |
2755 | struct snd_pcm_file *pcm_file; |
2756 | struct snd_pcm_substream *substream; | |
2757 | struct snd_pcm_runtime *runtime; | |
1da177e4 LT |
2758 | snd_pcm_sframes_t result; |
2759 | ||
2760 | pcm_file = file->private_data; | |
2761 | substream = pcm_file->substream; | |
2762 | snd_assert(substream != NULL, return -ENXIO); | |
2763 | runtime = substream->runtime; | |
2764 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) | |
2765 | return -EBADFD; | |
2766 | if (!frame_aligned(runtime, count)) | |
2767 | return -EINVAL; | |
2768 | count = bytes_to_frames(runtime, count); | |
2769 | result = snd_pcm_lib_read(substream, buf, count); | |
2770 | if (result > 0) | |
2771 | result = frames_to_bytes(runtime, result); | |
2772 | return result; | |
2773 | } | |
2774 | ||
877211f5 TI |
2775 | static ssize_t snd_pcm_write(struct file *file, const char __user *buf, |
2776 | size_t count, loff_t * offset) | |
1da177e4 | 2777 | { |
877211f5 TI |
2778 | struct snd_pcm_file *pcm_file; |
2779 | struct snd_pcm_substream *substream; | |
2780 | struct snd_pcm_runtime *runtime; | |
1da177e4 LT |
2781 | snd_pcm_sframes_t result; |
2782 | ||
2783 | pcm_file = file->private_data; | |
2784 | substream = pcm_file->substream; | |
2785 | snd_assert(substream != NULL, result = -ENXIO; goto end); | |
2786 | runtime = substream->runtime; | |
2787 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { | |
2788 | result = -EBADFD; | |
2789 | goto end; | |
2790 | } | |
2791 | if (!frame_aligned(runtime, count)) { | |
2792 | result = -EINVAL; | |
2793 | goto end; | |
2794 | } | |
2795 | count = bytes_to_frames(runtime, count); | |
2796 | result = snd_pcm_lib_write(substream, buf, count); | |
2797 | if (result > 0) | |
2798 | result = frames_to_bytes(runtime, result); | |
2799 | end: | |
2800 | return result; | |
2801 | } | |
2802 | ||
2803 | static ssize_t snd_pcm_readv(struct file *file, const struct iovec *_vector, | |
2804 | unsigned long count, loff_t * offset) | |
2805 | ||
2806 | { | |
877211f5 TI |
2807 | struct snd_pcm_file *pcm_file; |
2808 | struct snd_pcm_substream *substream; | |
2809 | struct snd_pcm_runtime *runtime; | |
1da177e4 LT |
2810 | snd_pcm_sframes_t result; |
2811 | unsigned long i; | |
2812 | void __user **bufs; | |
2813 | snd_pcm_uframes_t frames; | |
2814 | ||
2815 | pcm_file = file->private_data; | |
2816 | substream = pcm_file->substream; | |
2817 | snd_assert(substream != NULL, return -ENXIO); | |
2818 | runtime = substream->runtime; | |
2819 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) | |
2820 | return -EBADFD; | |
2821 | if (count > 1024 || count != runtime->channels) | |
2822 | return -EINVAL; | |
2823 | if (!frame_aligned(runtime, _vector->iov_len)) | |
2824 | return -EINVAL; | |
2825 | frames = bytes_to_samples(runtime, _vector->iov_len); | |
2826 | bufs = kmalloc(sizeof(void *) * count, GFP_KERNEL); | |
2827 | if (bufs == NULL) | |
2828 | return -ENOMEM; | |
2829 | for (i = 0; i < count; ++i) | |
2830 | bufs[i] = _vector[i].iov_base; | |
2831 | result = snd_pcm_lib_readv(substream, bufs, frames); | |
2832 | if (result > 0) | |
2833 | result = frames_to_bytes(runtime, result); | |
2834 | kfree(bufs); | |
2835 | return result; | |
2836 | } | |
2837 | ||
2838 | static ssize_t snd_pcm_writev(struct file *file, const struct iovec *_vector, | |
2839 | unsigned long count, loff_t * offset) | |
2840 | { | |
877211f5 TI |
2841 | struct snd_pcm_file *pcm_file; |
2842 | struct snd_pcm_substream *substream; | |
2843 | struct snd_pcm_runtime *runtime; | |
1da177e4 LT |
2844 | snd_pcm_sframes_t result; |
2845 | unsigned long i; | |
2846 | void __user **bufs; | |
2847 | snd_pcm_uframes_t frames; | |
2848 | ||
2849 | pcm_file = file->private_data; | |
2850 | substream = pcm_file->substream; | |
2851 | snd_assert(substream != NULL, result = -ENXIO; goto end); | |
2852 | runtime = substream->runtime; | |
2853 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { | |
2854 | result = -EBADFD; | |
2855 | goto end; | |
2856 | } | |
2857 | if (count > 128 || count != runtime->channels || | |
2858 | !frame_aligned(runtime, _vector->iov_len)) { | |
2859 | result = -EINVAL; | |
2860 | goto end; | |
2861 | } | |
2862 | frames = bytes_to_samples(runtime, _vector->iov_len); | |
2863 | bufs = kmalloc(sizeof(void *) * count, GFP_KERNEL); | |
2864 | if (bufs == NULL) | |
2865 | return -ENOMEM; | |
2866 | for (i = 0; i < count; ++i) | |
2867 | bufs[i] = _vector[i].iov_base; | |
2868 | result = snd_pcm_lib_writev(substream, bufs, frames); | |
2869 | if (result > 0) | |
2870 | result = frames_to_bytes(runtime, result); | |
2871 | kfree(bufs); | |
2872 | end: | |
2873 | return result; | |
2874 | } | |
2875 | ||
2876 | static unsigned int snd_pcm_playback_poll(struct file *file, poll_table * wait) | |
2877 | { | |
877211f5 TI |
2878 | struct snd_pcm_file *pcm_file; |
2879 | struct snd_pcm_substream *substream; | |
2880 | struct snd_pcm_runtime *runtime; | |
1da177e4 LT |
2881 | unsigned int mask; |
2882 | snd_pcm_uframes_t avail; | |
2883 | ||
2884 | pcm_file = file->private_data; | |
2885 | ||
2886 | substream = pcm_file->substream; | |
2887 | snd_assert(substream != NULL, return -ENXIO); | |
2888 | runtime = substream->runtime; | |
2889 | ||
2890 | poll_wait(file, &runtime->sleep, wait); | |
2891 | ||
2892 | snd_pcm_stream_lock_irq(substream); | |
2893 | avail = snd_pcm_playback_avail(runtime); | |
2894 | switch (runtime->status->state) { | |
2895 | case SNDRV_PCM_STATE_RUNNING: | |
2896 | case SNDRV_PCM_STATE_PREPARED: | |
2897 | case SNDRV_PCM_STATE_PAUSED: | |
2898 | if (avail >= runtime->control->avail_min) { | |
2899 | mask = POLLOUT | POLLWRNORM; | |
2900 | break; | |
2901 | } | |
2902 | /* Fall through */ | |
2903 | case SNDRV_PCM_STATE_DRAINING: | |
2904 | mask = 0; | |
2905 | break; | |
2906 | default: | |
2907 | mask = POLLOUT | POLLWRNORM | POLLERR; | |
2908 | break; | |
2909 | } | |
2910 | snd_pcm_stream_unlock_irq(substream); | |
2911 | return mask; | |
2912 | } | |
2913 | ||
2914 | static unsigned int snd_pcm_capture_poll(struct file *file, poll_table * wait) | |
2915 | { | |
877211f5 TI |
2916 | struct snd_pcm_file *pcm_file; |
2917 | struct snd_pcm_substream *substream; | |
2918 | struct snd_pcm_runtime *runtime; | |
1da177e4 LT |
2919 | unsigned int mask; |
2920 | snd_pcm_uframes_t avail; | |
2921 | ||
2922 | pcm_file = file->private_data; | |
2923 | ||
2924 | substream = pcm_file->substream; | |
2925 | snd_assert(substream != NULL, return -ENXIO); | |
2926 | runtime = substream->runtime; | |
2927 | ||
2928 | poll_wait(file, &runtime->sleep, wait); | |
2929 | ||
2930 | snd_pcm_stream_lock_irq(substream); | |
2931 | avail = snd_pcm_capture_avail(runtime); | |
2932 | switch (runtime->status->state) { | |
2933 | case SNDRV_PCM_STATE_RUNNING: | |
2934 | case SNDRV_PCM_STATE_PREPARED: | |
2935 | case SNDRV_PCM_STATE_PAUSED: | |
2936 | if (avail >= runtime->control->avail_min) { | |
2937 | mask = POLLIN | POLLRDNORM; | |
2938 | break; | |
2939 | } | |
2940 | mask = 0; | |
2941 | break; | |
2942 | case SNDRV_PCM_STATE_DRAINING: | |
2943 | if (avail > 0) { | |
2944 | mask = POLLIN | POLLRDNORM; | |
2945 | break; | |
2946 | } | |
2947 | /* Fall through */ | |
2948 | default: | |
2949 | mask = POLLIN | POLLRDNORM | POLLERR; | |
2950 | break; | |
2951 | } | |
2952 | snd_pcm_stream_unlock_irq(substream); | |
2953 | return mask; | |
2954 | } | |
2955 | ||
2956 | /* | |
2957 | * mmap support | |
2958 | */ | |
2959 | ||
2960 | /* | |
2961 | * Only on coherent architectures, we can mmap the status and the control records | |
2962 | * for effcient data transfer. On others, we have to use HWSYNC ioctl... | |
2963 | */ | |
2964 | #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA) | |
2965 | /* | |
2966 | * mmap status record | |
2967 | */ | |
877211f5 TI |
2968 | static struct page * snd_pcm_mmap_status_nopage(struct vm_area_struct *area, |
2969 | unsigned long address, int *type) | |
1da177e4 | 2970 | { |
877211f5 TI |
2971 | struct snd_pcm_substream *substream = area->vm_private_data; |
2972 | struct snd_pcm_runtime *runtime; | |
1da177e4 LT |
2973 | struct page * page; |
2974 | ||
2975 | if (substream == NULL) | |
2976 | return NOPAGE_OOM; | |
2977 | runtime = substream->runtime; | |
2978 | page = virt_to_page(runtime->status); | |
b5810039 | 2979 | get_page(page); |
1da177e4 LT |
2980 | if (type) |
2981 | *type = VM_FAULT_MINOR; | |
2982 | return page; | |
2983 | } | |
2984 | ||
2985 | static struct vm_operations_struct snd_pcm_vm_ops_status = | |
2986 | { | |
2987 | .nopage = snd_pcm_mmap_status_nopage, | |
2988 | }; | |
2989 | ||
877211f5 | 2990 | static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file, |
1da177e4 LT |
2991 | struct vm_area_struct *area) |
2992 | { | |
877211f5 | 2993 | struct snd_pcm_runtime *runtime; |
1da177e4 LT |
2994 | long size; |
2995 | if (!(area->vm_flags & VM_READ)) | |
2996 | return -EINVAL; | |
2997 | runtime = substream->runtime; | |
2998 | snd_assert(runtime != NULL, return -EAGAIN); | |
2999 | size = area->vm_end - area->vm_start; | |
877211f5 | 3000 | if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status))) |
1da177e4 LT |
3001 | return -EINVAL; |
3002 | area->vm_ops = &snd_pcm_vm_ops_status; | |
3003 | area->vm_private_data = substream; | |
3004 | area->vm_flags |= VM_RESERVED; | |
3005 | return 0; | |
3006 | } | |
3007 | ||
3008 | /* | |
3009 | * mmap control record | |
3010 | */ | |
877211f5 TI |
3011 | static struct page * snd_pcm_mmap_control_nopage(struct vm_area_struct *area, |
3012 | unsigned long address, int *type) | |
1da177e4 | 3013 | { |
877211f5 TI |
3014 | struct snd_pcm_substream *substream = area->vm_private_data; |
3015 | struct snd_pcm_runtime *runtime; | |
1da177e4 LT |
3016 | struct page * page; |
3017 | ||
3018 | if (substream == NULL) | |
3019 | return NOPAGE_OOM; | |
3020 | runtime = substream->runtime; | |
3021 | page = virt_to_page(runtime->control); | |
b5810039 | 3022 | get_page(page); |
1da177e4 LT |
3023 | if (type) |
3024 | *type = VM_FAULT_MINOR; | |
3025 | return page; | |
3026 | } | |
3027 | ||
3028 | static struct vm_operations_struct snd_pcm_vm_ops_control = | |
3029 | { | |
3030 | .nopage = snd_pcm_mmap_control_nopage, | |
3031 | }; | |
3032 | ||
877211f5 | 3033 | static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file, |
1da177e4 LT |
3034 | struct vm_area_struct *area) |
3035 | { | |
877211f5 | 3036 | struct snd_pcm_runtime *runtime; |
1da177e4 LT |
3037 | long size; |
3038 | if (!(area->vm_flags & VM_READ)) | |
3039 | return -EINVAL; | |
3040 | runtime = substream->runtime; | |
3041 | snd_assert(runtime != NULL, return -EAGAIN); | |
3042 | size = area->vm_end - area->vm_start; | |
877211f5 | 3043 | if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control))) |
1da177e4 LT |
3044 | return -EINVAL; |
3045 | area->vm_ops = &snd_pcm_vm_ops_control; | |
3046 | area->vm_private_data = substream; | |
3047 | area->vm_flags |= VM_RESERVED; | |
3048 | return 0; | |
3049 | } | |
3050 | #else /* ! coherent mmap */ | |
3051 | /* | |
3052 | * don't support mmap for status and control records. | |
3053 | */ | |
877211f5 | 3054 | static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file, |
1da177e4 LT |
3055 | struct vm_area_struct *area) |
3056 | { | |
3057 | return -ENXIO; | |
3058 | } | |
877211f5 | 3059 | static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file, |
1da177e4 LT |
3060 | struct vm_area_struct *area) |
3061 | { | |
3062 | return -ENXIO; | |
3063 | } | |
3064 | #endif /* coherent mmap */ | |
3065 | ||
3066 | /* | |
3067 | * nopage callback for mmapping a RAM page | |
3068 | */ | |
877211f5 TI |
3069 | static struct page *snd_pcm_mmap_data_nopage(struct vm_area_struct *area, |
3070 | unsigned long address, int *type) | |
1da177e4 | 3071 | { |
877211f5 TI |
3072 | struct snd_pcm_substream *substream = area->vm_private_data; |
3073 | struct snd_pcm_runtime *runtime; | |
1da177e4 LT |
3074 | unsigned long offset; |
3075 | struct page * page; | |
3076 | void *vaddr; | |
3077 | size_t dma_bytes; | |
3078 | ||
3079 | if (substream == NULL) | |
3080 | return NOPAGE_OOM; | |
3081 | runtime = substream->runtime; | |
3082 | offset = area->vm_pgoff << PAGE_SHIFT; | |
3083 | offset += address - area->vm_start; | |
3084 | snd_assert((offset % PAGE_SIZE) == 0, return NOPAGE_OOM); | |
3085 | dma_bytes = PAGE_ALIGN(runtime->dma_bytes); | |
3086 | if (offset > dma_bytes - PAGE_SIZE) | |
3087 | return NOPAGE_SIGBUS; | |
3088 | if (substream->ops->page) { | |
3089 | page = substream->ops->page(substream, offset); | |
3090 | if (! page) | |
3091 | return NOPAGE_OOM; | |
3092 | } else { | |
3093 | vaddr = runtime->dma_area + offset; | |
3094 | page = virt_to_page(vaddr); | |
3095 | } | |
b5810039 | 3096 | get_page(page); |
1da177e4 LT |
3097 | if (type) |
3098 | *type = VM_FAULT_MINOR; | |
3099 | return page; | |
3100 | } | |
3101 | ||
3102 | static struct vm_operations_struct snd_pcm_vm_ops_data = | |
3103 | { | |
3104 | .open = snd_pcm_mmap_data_open, | |
3105 | .close = snd_pcm_mmap_data_close, | |
3106 | .nopage = snd_pcm_mmap_data_nopage, | |
3107 | }; | |
3108 | ||
3109 | /* | |
3110 | * mmap the DMA buffer on RAM | |
3111 | */ | |
877211f5 TI |
3112 | static int snd_pcm_default_mmap(struct snd_pcm_substream *substream, |
3113 | struct vm_area_struct *area) | |
1da177e4 LT |
3114 | { |
3115 | area->vm_ops = &snd_pcm_vm_ops_data; | |
3116 | area->vm_private_data = substream; | |
3117 | area->vm_flags |= VM_RESERVED; | |
3118 | atomic_inc(&substream->runtime->mmap_count); | |
3119 | return 0; | |
3120 | } | |
3121 | ||
3122 | /* | |
3123 | * mmap the DMA buffer on I/O memory area | |
3124 | */ | |
3125 | #if SNDRV_PCM_INFO_MMAP_IOMEM | |
3126 | static struct vm_operations_struct snd_pcm_vm_ops_data_mmio = | |
3127 | { | |
3128 | .open = snd_pcm_mmap_data_open, | |
3129 | .close = snd_pcm_mmap_data_close, | |
3130 | }; | |
3131 | ||
877211f5 TI |
3132 | int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream, |
3133 | struct vm_area_struct *area) | |
1da177e4 LT |
3134 | { |
3135 | long size; | |
3136 | unsigned long offset; | |
3137 | ||
3138 | #ifdef pgprot_noncached | |
3139 | area->vm_page_prot = pgprot_noncached(area->vm_page_prot); | |
3140 | #endif | |
3141 | area->vm_ops = &snd_pcm_vm_ops_data_mmio; | |
3142 | area->vm_private_data = substream; | |
3143 | area->vm_flags |= VM_IO; | |
3144 | size = area->vm_end - area->vm_start; | |
3145 | offset = area->vm_pgoff << PAGE_SHIFT; | |
3146 | if (io_remap_pfn_range(area, area->vm_start, | |
3147 | (substream->runtime->dma_addr + offset) >> PAGE_SHIFT, | |
3148 | size, area->vm_page_prot)) | |
3149 | return -EAGAIN; | |
3150 | atomic_inc(&substream->runtime->mmap_count); | |
3151 | return 0; | |
3152 | } | |
3153 | #endif /* SNDRV_PCM_INFO_MMAP */ | |
3154 | ||
3155 | /* | |
3156 | * mmap DMA buffer | |
3157 | */ | |
877211f5 | 3158 | int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file, |
1da177e4 LT |
3159 | struct vm_area_struct *area) |
3160 | { | |
877211f5 | 3161 | struct snd_pcm_runtime *runtime; |
1da177e4 LT |
3162 | long size; |
3163 | unsigned long offset; | |
3164 | size_t dma_bytes; | |
3165 | ||
3166 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { | |
3167 | if (!(area->vm_flags & (VM_WRITE|VM_READ))) | |
3168 | return -EINVAL; | |
3169 | } else { | |
3170 | if (!(area->vm_flags & VM_READ)) | |
3171 | return -EINVAL; | |
3172 | } | |
3173 | runtime = substream->runtime; | |
3174 | snd_assert(runtime != NULL, return -EAGAIN); | |
3175 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) | |
3176 | return -EBADFD; | |
3177 | if (!(runtime->info & SNDRV_PCM_INFO_MMAP)) | |
3178 | return -ENXIO; | |
3179 | if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED || | |
3180 | runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) | |
3181 | return -EINVAL; | |
3182 | size = area->vm_end - area->vm_start; | |
3183 | offset = area->vm_pgoff << PAGE_SHIFT; | |
3184 | dma_bytes = PAGE_ALIGN(runtime->dma_bytes); | |
3185 | if ((size_t)size > dma_bytes) | |
3186 | return -EINVAL; | |
3187 | if (offset > dma_bytes - size) | |
3188 | return -EINVAL; | |
3189 | ||
3190 | if (substream->ops->mmap) | |
3191 | return substream->ops->mmap(substream, area); | |
3192 | else | |
3193 | return snd_pcm_default_mmap(substream, area); | |
3194 | } | |
3195 | ||
3196 | static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area) | |
3197 | { | |
877211f5 TI |
3198 | struct snd_pcm_file * pcm_file; |
3199 | struct snd_pcm_substream *substream; | |
1da177e4 LT |
3200 | unsigned long offset; |
3201 | ||
3202 | pcm_file = file->private_data; | |
3203 | substream = pcm_file->substream; | |
3204 | snd_assert(substream != NULL, return -ENXIO); | |
3205 | ||
3206 | offset = area->vm_pgoff << PAGE_SHIFT; | |
3207 | switch (offset) { | |
3208 | case SNDRV_PCM_MMAP_OFFSET_STATUS: | |
3209 | if (substream->no_mmap_ctrl) | |
3210 | return -ENXIO; | |
3211 | return snd_pcm_mmap_status(substream, file, area); | |
3212 | case SNDRV_PCM_MMAP_OFFSET_CONTROL: | |
3213 | if (substream->no_mmap_ctrl) | |
3214 | return -ENXIO; | |
3215 | return snd_pcm_mmap_control(substream, file, area); | |
3216 | default: | |
3217 | return snd_pcm_mmap_data(substream, file, area); | |
3218 | } | |
3219 | return 0; | |
3220 | } | |
3221 | ||
3222 | static int snd_pcm_fasync(int fd, struct file * file, int on) | |
3223 | { | |
877211f5 TI |
3224 | struct snd_pcm_file * pcm_file; |
3225 | struct snd_pcm_substream *substream; | |
3226 | struct snd_pcm_runtime *runtime; | |
1da177e4 LT |
3227 | int err; |
3228 | ||
3229 | pcm_file = file->private_data; | |
3230 | substream = pcm_file->substream; | |
3231 | snd_assert(substream != NULL, return -ENXIO); | |
3232 | runtime = substream->runtime; | |
3233 | ||
3234 | err = fasync_helper(fd, file, on, &runtime->fasync); | |
3235 | if (err < 0) | |
3236 | return err; | |
3237 | return 0; | |
3238 | } | |
3239 | ||
3240 | /* | |
3241 | * ioctl32 compat | |
3242 | */ | |
3243 | #ifdef CONFIG_COMPAT | |
3244 | #include "pcm_compat.c" | |
3245 | #else | |
3246 | #define snd_pcm_ioctl_compat NULL | |
3247 | #endif | |
3248 | ||
3249 | /* | |
3250 | * To be removed helpers to keep binary compatibility | |
3251 | */ | |
3252 | ||
3253 | #define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5)) | |
3254 | #define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5)) | |
3255 | ||
877211f5 TI |
3256 | static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params *params, |
3257 | struct snd_pcm_hw_params_old *oparams) | |
1da177e4 LT |
3258 | { |
3259 | unsigned int i; | |
3260 | ||
3261 | memset(params, 0, sizeof(*params)); | |
3262 | params->flags = oparams->flags; | |
3263 | for (i = 0; i < ARRAY_SIZE(oparams->masks); i++) | |
3264 | params->masks[i].bits[0] = oparams->masks[i]; | |
3265 | memcpy(params->intervals, oparams->intervals, sizeof(oparams->intervals)); | |
3266 | params->rmask = __OLD_TO_NEW_MASK(oparams->rmask); | |
3267 | params->cmask = __OLD_TO_NEW_MASK(oparams->cmask); | |
3268 | params->info = oparams->info; | |
3269 | params->msbits = oparams->msbits; | |
3270 | params->rate_num = oparams->rate_num; | |
3271 | params->rate_den = oparams->rate_den; | |
3272 | params->fifo_size = oparams->fifo_size; | |
3273 | } | |
3274 | ||
877211f5 TI |
3275 | static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old *oparams, |
3276 | struct snd_pcm_hw_params *params) | |
1da177e4 LT |
3277 | { |
3278 | unsigned int i; | |
3279 | ||
3280 | memset(oparams, 0, sizeof(*oparams)); | |
3281 | oparams->flags = params->flags; | |
3282 | for (i = 0; i < ARRAY_SIZE(oparams->masks); i++) | |
3283 | oparams->masks[i] = params->masks[i].bits[0]; | |
3284 | memcpy(oparams->intervals, params->intervals, sizeof(oparams->intervals)); | |
3285 | oparams->rmask = __NEW_TO_OLD_MASK(params->rmask); | |
3286 | oparams->cmask = __NEW_TO_OLD_MASK(params->cmask); | |
3287 | oparams->info = params->info; | |
3288 | oparams->msbits = params->msbits; | |
3289 | oparams->rate_num = params->rate_num; | |
3290 | oparams->rate_den = params->rate_den; | |
3291 | oparams->fifo_size = params->fifo_size; | |
3292 | } | |
3293 | ||
877211f5 TI |
3294 | static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream, |
3295 | struct snd_pcm_hw_params_old __user * _oparams) | |
1da177e4 | 3296 | { |
877211f5 TI |
3297 | struct snd_pcm_hw_params *params; |
3298 | struct snd_pcm_hw_params_old *oparams = NULL; | |
1da177e4 LT |
3299 | int err; |
3300 | ||
3301 | params = kmalloc(sizeof(*params), GFP_KERNEL); | |
3302 | if (!params) { | |
3303 | err = -ENOMEM; | |
3304 | goto out; | |
3305 | } | |
3306 | oparams = kmalloc(sizeof(*oparams), GFP_KERNEL); | |
3307 | if (!oparams) { | |
3308 | err = -ENOMEM; | |
3309 | goto out; | |
3310 | } | |
3311 | ||
3312 | if (copy_from_user(oparams, _oparams, sizeof(*oparams))) { | |
3313 | err = -EFAULT; | |
3314 | goto out; | |
3315 | } | |
3316 | snd_pcm_hw_convert_from_old_params(params, oparams); | |
3317 | err = snd_pcm_hw_refine(substream, params); | |
3318 | snd_pcm_hw_convert_to_old_params(oparams, params); | |
3319 | if (copy_to_user(_oparams, oparams, sizeof(*oparams))) { | |
3320 | if (!err) | |
3321 | err = -EFAULT; | |
3322 | } | |
3323 | out: | |
3324 | kfree(params); | |
3325 | kfree(oparams); | |
3326 | return err; | |
3327 | } | |
3328 | ||
877211f5 TI |
3329 | static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream, |
3330 | struct snd_pcm_hw_params_old __user * _oparams) | |
1da177e4 | 3331 | { |
877211f5 TI |
3332 | struct snd_pcm_hw_params *params; |
3333 | struct snd_pcm_hw_params_old *oparams = NULL; | |
1da177e4 LT |
3334 | int err; |
3335 | ||
3336 | params = kmalloc(sizeof(*params), GFP_KERNEL); | |
3337 | if (!params) { | |
3338 | err = -ENOMEM; | |
3339 | goto out; | |
3340 | } | |
3341 | oparams = kmalloc(sizeof(*oparams), GFP_KERNEL); | |
3342 | if (!oparams) { | |
3343 | err = -ENOMEM; | |
3344 | goto out; | |
3345 | } | |
3346 | if (copy_from_user(oparams, _oparams, sizeof(*oparams))) { | |
3347 | err = -EFAULT; | |
3348 | goto out; | |
3349 | } | |
3350 | snd_pcm_hw_convert_from_old_params(params, oparams); | |
3351 | err = snd_pcm_hw_params(substream, params); | |
3352 | snd_pcm_hw_convert_to_old_params(oparams, params); | |
3353 | if (copy_to_user(_oparams, oparams, sizeof(*oparams))) { | |
3354 | if (!err) | |
3355 | err = -EFAULT; | |
3356 | } | |
3357 | out: | |
3358 | kfree(params); | |
3359 | kfree(oparams); | |
3360 | return err; | |
3361 | } | |
3362 | ||
3363 | /* | |
3364 | * Register section | |
3365 | */ | |
3366 | ||
3367 | static struct file_operations snd_pcm_f_ops_playback = { | |
3368 | .owner = THIS_MODULE, | |
3369 | .write = snd_pcm_write, | |
3370 | .writev = snd_pcm_writev, | |
3371 | .open = snd_pcm_open, | |
3372 | .release = snd_pcm_release, | |
3373 | .poll = snd_pcm_playback_poll, | |
3374 | .unlocked_ioctl = snd_pcm_playback_ioctl, | |
3375 | .compat_ioctl = snd_pcm_ioctl_compat, | |
3376 | .mmap = snd_pcm_mmap, | |
3377 | .fasync = snd_pcm_fasync, | |
3378 | }; | |
3379 | ||
3380 | static struct file_operations snd_pcm_f_ops_capture = { | |
3381 | .owner = THIS_MODULE, | |
3382 | .read = snd_pcm_read, | |
3383 | .readv = snd_pcm_readv, | |
3384 | .open = snd_pcm_open, | |
3385 | .release = snd_pcm_release, | |
3386 | .poll = snd_pcm_capture_poll, | |
3387 | .unlocked_ioctl = snd_pcm_capture_ioctl, | |
3388 | .compat_ioctl = snd_pcm_ioctl_compat, | |
3389 | .mmap = snd_pcm_mmap, | |
3390 | .fasync = snd_pcm_fasync, | |
3391 | }; | |
3392 | ||
877211f5 | 3393 | struct snd_minor snd_pcm_reg[2] = |
1da177e4 LT |
3394 | { |
3395 | { | |
3396 | .comment = "digital audio playback", | |
3397 | .f_ops = &snd_pcm_f_ops_playback, | |
3398 | }, | |
3399 | { | |
3400 | .comment = "digital audio capture", | |
3401 | .f_ops = &snd_pcm_f_ops_capture, | |
3402 | } | |
3403 | }; |