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1 | /* |
2 | * Dummy soundcard |
3 | * Copyright (c) by Jaroslav Kysela <perex@perex.cz> |
4 | * |
5 | * This program is free software; you can redistribute it and/or modify |
6 | * it under the terms of the GNU General Public License as published by |
7 | * the Free Software Foundation; either version 2 of the License, or |
8 | * (at your option) any later version. |
9 | * |
10 | * This program is distributed in the hope that it will be useful, |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
13 | * GNU General Public License for more details. |
14 | * |
15 | * You should have received a copy of the GNU General Public License |
16 | * along with this program; if not, write to the Free Software |
17 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
18 | * |
19 | */ |
20 | |
21 | #include <linux/init.h> |
22 | #include <linux/err.h> |
23 | #include <linux/platform_device.h> |
24 | #include <linux/jiffies.h> |
25 | #include <linux/slab.h> |
26 | #include <linux/time.h> |
27 | #include <linux/wait.h> |
28 | #include <linux/hrtimer.h> |
29 | #include <linux/math64.h> |
30 | #include <linux/moduleparam.h> |
31 | #include <sound/core.h> |
32 | #include <sound/control.h> |
33 | #include <sound/tlv.h> |
34 | #include <sound/pcm.h> |
35 | #include <sound/rawmidi.h> |
36 | #include <sound/info.h> |
37 | #include <sound/initval.h> |
38 | |
39 | MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>"); |
40 | MODULE_DESCRIPTION("Dummy soundcard (/dev/null)"); |
41 | MODULE_LICENSE("GPL"); |
42 | MODULE_SUPPORTED_DEVICE("{{ALSA,Dummy soundcard}}"); |
43 | |
44 | #define MAX_PCM_DEVICES 4 |
45 | #define MAX_PCM_SUBSTREAMS 128 |
46 | #define MAX_MIDI_DEVICES 2 |
47 | |
48 | /* defaults */ |
49 | #define MAX_BUFFER_SIZE (64*1024) |
50 | #define MIN_PERIOD_SIZE 64 |
51 | #define MAX_PERIOD_SIZE MAX_BUFFER_SIZE |
52 | #define USE_FORMATS (SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE) |
53 | #define USE_RATE SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_48000 |
54 | #define USE_RATE_MIN 5500 |
55 | #define USE_RATE_MAX 48000 |
56 | #define USE_CHANNELS_MIN 1 |
57 | #define USE_CHANNELS_MAX 2 |
58 | #define USE_PERIODS_MIN 1 |
59 | #define USE_PERIODS_MAX 1024 |
60 | |
61 | static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-MAX */ |
62 | static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* ID for this card */ |
63 | static int enable[SNDRV_CARDS] = {1, [1 ... (SNDRV_CARDS - 1)] = 0}; |
64 | static char *model[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = NULL}; |
65 | static int pcm_devs[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 1}; |
66 | static int pcm_substreams[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 8}; |
67 | //static int midi_devs[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 2}; |
68 | #ifdef CONFIG_HIGH_RES_TIMERS |
69 | static int hrtimer = 1; |
70 | #endif |
71 | static int fake_buffer = 1; |
72 | |
73 | module_param_array(index, int, NULL, 0444); |
74 | MODULE_PARM_DESC(index, "Index value for dummy soundcard."); |
75 | module_param_array(id, charp, NULL, 0444); |
76 | MODULE_PARM_DESC(id, "ID string for dummy soundcard."); |
77 | module_param_array(enable, bool, NULL, 0444); |
78 | MODULE_PARM_DESC(enable, "Enable this dummy soundcard."); |
79 | module_param_array(model, charp, NULL, 0444); |
80 | MODULE_PARM_DESC(model, "Soundcard model."); |
81 | module_param_array(pcm_devs, int, NULL, 0444); |
82 | MODULE_PARM_DESC(pcm_devs, "PCM devices # (0-4) for dummy driver."); |
83 | module_param_array(pcm_substreams, int, NULL, 0444); |
84 | MODULE_PARM_DESC(pcm_substreams, "PCM substreams # (1-128) for dummy driver."); |
85 | //module_param_array(midi_devs, int, NULL, 0444); |
86 | //MODULE_PARM_DESC(midi_devs, "MIDI devices # (0-2) for dummy driver."); |
87 | module_param(fake_buffer, bool, 0444); |
88 | MODULE_PARM_DESC(fake_buffer, "Fake buffer allocations."); |
89 | #ifdef CONFIG_HIGH_RES_TIMERS |
90 | module_param(hrtimer, bool, 0644); |
91 | MODULE_PARM_DESC(hrtimer, "Use hrtimer as the timer source."); |
92 | #endif |
93 | |
94 | static struct platform_device *devices[SNDRV_CARDS]; |
95 | |
96 | #define MIXER_ADDR_MASTER 0 |
97 | #define MIXER_ADDR_LINE 1 |
98 | #define MIXER_ADDR_MIC 2 |
99 | #define MIXER_ADDR_SYNTH 3 |
100 | #define MIXER_ADDR_CD 4 |
101 | #define MIXER_ADDR_LAST 4 |
102 | |
103 | struct dummy_timer_ops { |
104 | int (*create)(struct snd_pcm_substream *); |
105 | void (*free)(struct snd_pcm_substream *); |
106 | int (*prepare)(struct snd_pcm_substream *); |
107 | int (*start)(struct snd_pcm_substream *); |
108 | int (*stop)(struct snd_pcm_substream *); |
109 | snd_pcm_uframes_t (*pointer)(struct snd_pcm_substream *); |
110 | }; |
111 | |
112 | struct dummy_model { |
113 | const char *name; |
114 | int (*playback_constraints)(struct snd_pcm_runtime *runtime); |
115 | int (*capture_constraints)(struct snd_pcm_runtime *runtime); |
116 | u64 formats; |
117 | size_t buffer_bytes_max; |
118 | size_t period_bytes_min; |
119 | size_t period_bytes_max; |
120 | unsigned int periods_min; |
121 | unsigned int periods_max; |
122 | unsigned int rates; |
123 | unsigned int rate_min; |
124 | unsigned int rate_max; |
125 | unsigned int channels_min; |
126 | unsigned int channels_max; |
127 | }; |
128 | |
129 | struct snd_dummy { |
130 | struct snd_card *card; |
131 | struct dummy_model *model; |
132 | struct snd_pcm *pcm; |
133 | struct snd_pcm_hardware pcm_hw; |
134 | spinlock_t mixer_lock; |
135 | int mixer_volume[MIXER_ADDR_LAST+1][2]; |
136 | int capture_source[MIXER_ADDR_LAST+1][2]; |
137 | const struct dummy_timer_ops *timer_ops; |
138 | }; |
139 | |
140 | /* |
141 | * card models |
142 | */ |
143 | |
144 | static int emu10k1_playback_constraints(struct snd_pcm_runtime *runtime) |
145 | { |
146 | int err; |
147 | err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS); |
148 | if (err < 0) |
149 | return err; |
150 | err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 256, UINT_MAX); |
151 | if (err < 0) |
152 | return err; |
153 | return 0; |
154 | } |
155 | |
156 | struct dummy_model model_emu10k1 = { |
157 | .name = "emu10k1", |
158 | .playback_constraints = emu10k1_playback_constraints, |
159 | .buffer_bytes_max = 128 * 1024, |
160 | }; |
161 | |
162 | struct dummy_model model_rme9652 = { |
163 | .name = "rme9652", |
164 | .buffer_bytes_max = 26 * 64 * 1024, |
165 | .formats = SNDRV_PCM_FMTBIT_S32_LE, |
166 | .channels_min = 26, |
167 | .channels_max = 26, |
168 | .periods_min = 2, |
169 | .periods_max = 2, |
170 | }; |
171 | |
172 | struct dummy_model model_ice1712 = { |
173 | .name = "ice1712", |
174 | .buffer_bytes_max = 256 * 1024, |
175 | .formats = SNDRV_PCM_FMTBIT_S32_LE, |
176 | .channels_min = 10, |
177 | .channels_max = 10, |
178 | .periods_min = 1, |
179 | .periods_max = 1024, |
180 | }; |
181 | |
182 | struct dummy_model model_uda1341 = { |
183 | .name = "uda1341", |
184 | .buffer_bytes_max = 16380, |
185 | .formats = SNDRV_PCM_FMTBIT_S16_LE, |
186 | .channels_min = 2, |
187 | .channels_max = 2, |
188 | .periods_min = 2, |
189 | .periods_max = 255, |
190 | }; |
191 | |
192 | struct dummy_model model_ac97 = { |
193 | .name = "ac97", |
194 | .formats = SNDRV_PCM_FMTBIT_S16_LE, |
195 | .channels_min = 2, |
196 | .channels_max = 2, |
197 | .rates = SNDRV_PCM_RATE_48000, |
198 | .rate_min = 48000, |
199 | .rate_max = 48000, |
200 | }; |
201 | |
202 | struct dummy_model model_ca0106 = { |
203 | .name = "ca0106", |
204 | .formats = SNDRV_PCM_FMTBIT_S16_LE, |
205 | .buffer_bytes_max = ((65536-64)*8), |
206 | .period_bytes_max = (65536-64), |
207 | .periods_min = 2, |
208 | .periods_max = 8, |
209 | .channels_min = 2, |
210 | .channels_max = 2, |
211 | .rates = SNDRV_PCM_RATE_48000|SNDRV_PCM_RATE_96000|SNDRV_PCM_RATE_192000, |
212 | .rate_min = 48000, |
213 | .rate_max = 192000, |
214 | }; |
215 | |
216 | struct dummy_model *dummy_models[] = { |
217 | &model_emu10k1, |
218 | &model_rme9652, |
219 | &model_ice1712, |
220 | &model_uda1341, |
221 | &model_ac97, |
222 | &model_ca0106, |
223 | NULL |
224 | }; |
225 | |
226 | /* |
227 | * system timer interface |
228 | */ |
229 | |
230 | struct dummy_systimer_pcm { |
231 | spinlock_t lock; |
232 | struct timer_list timer; |
233 | unsigned long base_time; |
234 | unsigned int frac_pos; /* fractional sample position (based HZ) */ |
235 | unsigned int frac_period_rest; |
236 | unsigned int frac_buffer_size; /* buffer_size * HZ */ |
237 | unsigned int frac_period_size; /* period_size * HZ */ |
238 | unsigned int rate; |
239 | int elapsed; |
240 | struct snd_pcm_substream *substream; |
241 | }; |
242 | |
243 | static void dummy_systimer_rearm(struct dummy_systimer_pcm *dpcm) |
244 | { |
245 | dpcm->timer.expires = jiffies + |
246 | (dpcm->frac_period_rest + dpcm->rate - 1) / dpcm->rate; |
247 | add_timer(&dpcm->timer); |
248 | } |
249 | |
250 | static void dummy_systimer_update(struct dummy_systimer_pcm *dpcm) |
251 | { |
252 | unsigned long delta; |
253 | |
254 | delta = jiffies - dpcm->base_time; |
255 | if (!delta) |
256 | return; |
257 | dpcm->base_time += delta; |
258 | delta *= dpcm->rate; |
259 | dpcm->frac_pos += delta; |
260 | while (dpcm->frac_pos >= dpcm->frac_buffer_size) |
261 | dpcm->frac_pos -= dpcm->frac_buffer_size; |
262 | while (dpcm->frac_period_rest <= delta) { |
263 | dpcm->elapsed++; |
264 | dpcm->frac_period_rest += dpcm->frac_period_size; |
265 | } |
266 | dpcm->frac_period_rest -= delta; |
267 | } |
268 | |
269 | static int dummy_systimer_start(struct snd_pcm_substream *substream) |
270 | { |
271 | struct dummy_systimer_pcm *dpcm = substream->runtime->private_data; |
272 | spin_lock(&dpcm->lock); |
273 | dpcm->base_time = jiffies; |
274 | dummy_systimer_rearm(dpcm); |
275 | spin_unlock(&dpcm->lock); |
276 | return 0; |
277 | } |
278 | |
279 | static int dummy_systimer_stop(struct snd_pcm_substream *substream) |
280 | { |
281 | struct dummy_systimer_pcm *dpcm = substream->runtime->private_data; |
282 | spin_lock(&dpcm->lock); |
283 | del_timer(&dpcm->timer); |
284 | spin_unlock(&dpcm->lock); |
285 | return 0; |
286 | } |
287 | |
288 | static int dummy_systimer_prepare(struct snd_pcm_substream *substream) |
289 | { |
290 | struct snd_pcm_runtime *runtime = substream->runtime; |
291 | struct dummy_systimer_pcm *dpcm = runtime->private_data; |
292 | |
293 | dpcm->frac_pos = 0; |
294 | dpcm->rate = runtime->rate; |
295 | dpcm->frac_buffer_size = runtime->buffer_size * HZ; |
296 | dpcm->frac_period_size = runtime->period_size * HZ; |
297 | dpcm->frac_period_rest = dpcm->frac_period_size; |
298 | dpcm->elapsed = 0; |
299 | |
300 | return 0; |
301 | } |
302 | |
303 | static void dummy_systimer_callback(unsigned long data) |
304 | { |
305 | struct dummy_systimer_pcm *dpcm = (struct dummy_systimer_pcm *)data; |
306 | unsigned long flags; |
307 | int elapsed = 0; |
308 | |
309 | spin_lock_irqsave(&dpcm->lock, flags); |
310 | dummy_systimer_update(dpcm); |
311 | dummy_systimer_rearm(dpcm); |
312 | elapsed = dpcm->elapsed; |
313 | dpcm->elapsed = 0; |
314 | spin_unlock_irqrestore(&dpcm->lock, flags); |
315 | if (elapsed) |
316 | snd_pcm_period_elapsed(dpcm->substream); |
317 | } |
318 | |
319 | static snd_pcm_uframes_t |
320 | dummy_systimer_pointer(struct snd_pcm_substream *substream) |
321 | { |
322 | struct dummy_systimer_pcm *dpcm = substream->runtime->private_data; |
323 | snd_pcm_uframes_t pos; |
324 | |
325 | spin_lock(&dpcm->lock); |
326 | dummy_systimer_update(dpcm); |
327 | pos = dpcm->frac_pos / HZ; |
328 | spin_unlock(&dpcm->lock); |
329 | return pos; |
330 | } |
331 | |
332 | static int dummy_systimer_create(struct snd_pcm_substream *substream) |
333 | { |
334 | struct dummy_systimer_pcm *dpcm; |
335 | |
336 | dpcm = kzalloc(sizeof(*dpcm), GFP_KERNEL); |
337 | if (!dpcm) |
338 | return -ENOMEM; |
339 | substream->runtime->private_data = dpcm; |
340 | init_timer(&dpcm->timer); |
341 | dpcm->timer.data = (unsigned long) dpcm; |
342 | dpcm->timer.function = dummy_systimer_callback; |
343 | spin_lock_init(&dpcm->lock); |
344 | dpcm->substream = substream; |
345 | return 0; |
346 | } |
347 | |
348 | static void dummy_systimer_free(struct snd_pcm_substream *substream) |
349 | { |
350 | kfree(substream->runtime->private_data); |
351 | } |
352 | |
353 | static struct dummy_timer_ops dummy_systimer_ops = { |
354 | .create = dummy_systimer_create, |
355 | .free = dummy_systimer_free, |
356 | .prepare = dummy_systimer_prepare, |
357 | .start = dummy_systimer_start, |
358 | .stop = dummy_systimer_stop, |
359 | .pointer = dummy_systimer_pointer, |
360 | }; |
361 | |
362 | #ifdef CONFIG_HIGH_RES_TIMERS |
363 | /* |
364 | * hrtimer interface |
365 | */ |
366 | |
367 | struct dummy_hrtimer_pcm { |
368 | ktime_t base_time; |
369 | ktime_t period_time; |
370 | atomic_t running; |
371 | struct hrtimer timer; |
372 | struct tasklet_struct tasklet; |
373 | struct snd_pcm_substream *substream; |
374 | }; |
375 | |
376 | static void dummy_hrtimer_pcm_elapsed(unsigned long priv) |
377 | { |
378 | struct dummy_hrtimer_pcm *dpcm = (struct dummy_hrtimer_pcm *)priv; |
379 | if (atomic_read(&dpcm->running)) |
380 | snd_pcm_period_elapsed(dpcm->substream); |
381 | } |
382 | |
383 | static enum hrtimer_restart dummy_hrtimer_callback(struct hrtimer *timer) |
384 | { |
385 | struct dummy_hrtimer_pcm *dpcm; |
386 | |
387 | dpcm = container_of(timer, struct dummy_hrtimer_pcm, timer); |
388 | if (!atomic_read(&dpcm->running)) |
389 | return HRTIMER_NORESTART; |
390 | tasklet_schedule(&dpcm->tasklet); |
391 | hrtimer_forward_now(timer, dpcm->period_time); |
392 | return HRTIMER_RESTART; |
393 | } |
394 | |
395 | static int dummy_hrtimer_start(struct snd_pcm_substream *substream) |
396 | { |
397 | struct dummy_hrtimer_pcm *dpcm = substream->runtime->private_data; |
398 | |
399 | dpcm->base_time = hrtimer_cb_get_time(&dpcm->timer); |
400 | hrtimer_start(&dpcm->timer, dpcm->period_time, HRTIMER_MODE_REL); |
401 | atomic_set(&dpcm->running, 1); |
402 | return 0; |
403 | } |
404 | |
405 | static int dummy_hrtimer_stop(struct snd_pcm_substream *substream) |
406 | { |
407 | struct dummy_hrtimer_pcm *dpcm = substream->runtime->private_data; |
408 | |
409 | atomic_set(&dpcm->running, 0); |
410 | hrtimer_cancel(&dpcm->timer); |
411 | return 0; |
412 | } |
413 | |
414 | static inline void dummy_hrtimer_sync(struct dummy_hrtimer_pcm *dpcm) |
415 | { |
416 | tasklet_kill(&dpcm->tasklet); |
417 | } |
418 | |
419 | static snd_pcm_uframes_t |
420 | dummy_hrtimer_pointer(struct snd_pcm_substream *substream) |
421 | { |
422 | struct snd_pcm_runtime *runtime = substream->runtime; |
423 | struct dummy_hrtimer_pcm *dpcm = runtime->private_data; |
424 | u64 delta; |
425 | u32 pos; |
426 | |
427 | delta = ktime_us_delta(hrtimer_cb_get_time(&dpcm->timer), |
428 | dpcm->base_time); |
429 | delta = div_u64(delta * runtime->rate + 999999, 1000000); |
430 | div_u64_rem(delta, runtime->buffer_size, &pos); |
431 | return pos; |
432 | } |
433 | |
434 | static int dummy_hrtimer_prepare(struct snd_pcm_substream *substream) |
435 | { |
436 | struct snd_pcm_runtime *runtime = substream->runtime; |
437 | struct dummy_hrtimer_pcm *dpcm = runtime->private_data; |
438 | unsigned int period, rate; |
439 | long sec; |
440 | unsigned long nsecs; |
441 | |
442 | dummy_hrtimer_sync(dpcm); |
443 | period = runtime->period_size; |
444 | rate = runtime->rate; |
445 | sec = period / rate; |
446 | period %= rate; |
447 | nsecs = div_u64((u64)period * 1000000000UL + rate - 1, rate); |
448 | dpcm->period_time = ktime_set(sec, nsecs); |
449 | |
450 | return 0; |
451 | } |
452 | |
453 | static int dummy_hrtimer_create(struct snd_pcm_substream *substream) |
454 | { |
455 | struct dummy_hrtimer_pcm *dpcm; |
456 | |
457 | dpcm = kzalloc(sizeof(*dpcm), GFP_KERNEL); |
458 | if (!dpcm) |
459 | return -ENOMEM; |
460 | substream->runtime->private_data = dpcm; |
461 | hrtimer_init(&dpcm->timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); |
462 | dpcm->timer.function = dummy_hrtimer_callback; |
463 | dpcm->substream = substream; |
464 | atomic_set(&dpcm->running, 0); |
465 | tasklet_init(&dpcm->tasklet, dummy_hrtimer_pcm_elapsed, |
466 | (unsigned long)dpcm); |
467 | return 0; |
468 | } |
469 | |
470 | static void dummy_hrtimer_free(struct snd_pcm_substream *substream) |
471 | { |
472 | struct dummy_hrtimer_pcm *dpcm = substream->runtime->private_data; |
473 | dummy_hrtimer_sync(dpcm); |
474 | kfree(dpcm); |
475 | } |
476 | |
477 | static struct dummy_timer_ops dummy_hrtimer_ops = { |
478 | .create = dummy_hrtimer_create, |
479 | .free = dummy_hrtimer_free, |
480 | .prepare = dummy_hrtimer_prepare, |
481 | .start = dummy_hrtimer_start, |
482 | .stop = dummy_hrtimer_stop, |
483 | .pointer = dummy_hrtimer_pointer, |
484 | }; |
485 | |
486 | #endif /* CONFIG_HIGH_RES_TIMERS */ |
487 | |
488 | /* |
489 | * PCM interface |
490 | */ |
491 | |
492 | static int dummy_pcm_trigger(struct snd_pcm_substream *substream, int cmd) |
493 | { |
494 | struct snd_dummy *dummy = snd_pcm_substream_chip(substream); |
495 | |
496 | switch (cmd) { |
497 | case SNDRV_PCM_TRIGGER_START: |
498 | case SNDRV_PCM_TRIGGER_RESUME: |
499 | return dummy->timer_ops->start(substream); |
500 | case SNDRV_PCM_TRIGGER_STOP: |
501 | case SNDRV_PCM_TRIGGER_SUSPEND: |
502 | return dummy->timer_ops->stop(substream); |
503 | } |
504 | return -EINVAL; |
505 | } |
506 | |
507 | static int dummy_pcm_prepare(struct snd_pcm_substream *substream) |
508 | { |
509 | struct snd_dummy *dummy = snd_pcm_substream_chip(substream); |
510 | |
511 | return dummy->timer_ops->prepare(substream); |
512 | } |
513 | |
514 | static snd_pcm_uframes_t dummy_pcm_pointer(struct snd_pcm_substream *substream) |
515 | { |
516 | struct snd_dummy *dummy = snd_pcm_substream_chip(substream); |
517 | |
518 | return dummy->timer_ops->pointer(substream); |
519 | } |
520 | |
521 | static struct snd_pcm_hardware dummy_pcm_hardware = { |
522 | .info = (SNDRV_PCM_INFO_MMAP | |
523 | SNDRV_PCM_INFO_INTERLEAVED | |
524 | SNDRV_PCM_INFO_RESUME | |
525 | SNDRV_PCM_INFO_MMAP_VALID), |
526 | .formats = USE_FORMATS, |
527 | .rates = USE_RATE, |
528 | .rate_min = USE_RATE_MIN, |
529 | .rate_max = USE_RATE_MAX, |
530 | .channels_min = USE_CHANNELS_MIN, |
531 | .channels_max = USE_CHANNELS_MAX, |
532 | .buffer_bytes_max = MAX_BUFFER_SIZE, |
533 | .period_bytes_min = MIN_PERIOD_SIZE, |
534 | .period_bytes_max = MAX_PERIOD_SIZE, |
535 | .periods_min = USE_PERIODS_MIN, |
536 | .periods_max = USE_PERIODS_MAX, |
537 | .fifo_size = 0, |
538 | }; |
539 | |
540 | static int dummy_pcm_hw_params(struct snd_pcm_substream *substream, |
541 | struct snd_pcm_hw_params *hw_params) |
542 | { |
543 | if (fake_buffer) { |
544 | /* runtime->dma_bytes has to be set manually to allow mmap */ |
545 | substream->runtime->dma_bytes = params_buffer_bytes(hw_params); |
546 | return 0; |
547 | } |
548 | return snd_pcm_lib_malloc_pages(substream, |
549 | params_buffer_bytes(hw_params)); |
550 | } |
551 | |
552 | static int dummy_pcm_hw_free(struct snd_pcm_substream *substream) |
553 | { |
554 | if (fake_buffer) |
555 | return 0; |
556 | return snd_pcm_lib_free_pages(substream); |
557 | } |
558 | |
559 | static int dummy_pcm_open(struct snd_pcm_substream *substream) |
560 | { |
561 | struct snd_dummy *dummy = snd_pcm_substream_chip(substream); |
562 | struct dummy_model *model = dummy->model; |
563 | struct snd_pcm_runtime *runtime = substream->runtime; |
564 | int err; |
565 | |
566 | dummy->timer_ops = &dummy_systimer_ops; |
567 | #ifdef CONFIG_HIGH_RES_TIMERS |
568 | if (hrtimer) |
569 | dummy->timer_ops = &dummy_hrtimer_ops; |
570 | #endif |
571 | |
572 | err = dummy->timer_ops->create(substream); |
573 | if (err < 0) |
574 | return err; |
575 | |
576 | runtime->hw = dummy->pcm_hw; |
577 | if (substream->pcm->device & 1) { |
578 | runtime->hw.info &= ~SNDRV_PCM_INFO_INTERLEAVED; |
579 | runtime->hw.info |= SNDRV_PCM_INFO_NONINTERLEAVED; |
580 | } |
581 | if (substream->pcm->device & 2) |
582 | runtime->hw.info &= ~(SNDRV_PCM_INFO_MMAP | |
583 | SNDRV_PCM_INFO_MMAP_VALID); |
584 | |
585 | if (model == NULL) |
586 | return 0; |
587 | |
588 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { |
589 | if (model->playback_constraints) |
590 | err = model->playback_constraints(substream->runtime); |
591 | } else { |
592 | if (model->capture_constraints) |
593 | err = model->capture_constraints(substream->runtime); |
594 | } |
595 | if (err < 0) { |
596 | dummy->timer_ops->free(substream); |
597 | return err; |
598 | } |
599 | return 0; |
600 | } |
601 | |
602 | static int dummy_pcm_close(struct snd_pcm_substream *substream) |
603 | { |
604 | struct snd_dummy *dummy = snd_pcm_substream_chip(substream); |
605 | dummy->timer_ops->free(substream); |
606 | return 0; |
607 | } |
608 | |
609 | /* |
610 | * dummy buffer handling |
611 | */ |
612 | |
613 | static void *dummy_page[2]; |
614 | |
615 | static void free_fake_buffer(void) |
616 | { |
617 | if (fake_buffer) { |
618 | int i; |
619 | for (i = 0; i < 2; i++) |
620 | if (dummy_page[i]) { |
621 | free_page((unsigned long)dummy_page[i]); |
622 | dummy_page[i] = NULL; |
623 | } |
624 | } |
625 | } |
626 | |
627 | static int alloc_fake_buffer(void) |
628 | { |
629 | int i; |
630 | |
631 | if (!fake_buffer) |
632 | return 0; |
633 | for (i = 0; i < 2; i++) { |
634 | dummy_page[i] = (void *)get_zeroed_page(GFP_KERNEL); |
635 | if (!dummy_page[i]) { |
636 | free_fake_buffer(); |
637 | return -ENOMEM; |
638 | } |
639 | } |
640 | return 0; |
641 | } |
642 | |
643 | static int dummy_pcm_copy(struct snd_pcm_substream *substream, |
644 | int channel, snd_pcm_uframes_t pos, |
645 | void __user *dst, snd_pcm_uframes_t count) |
646 | { |
647 | return 0; /* do nothing */ |
648 | } |
649 | |
650 | static int dummy_pcm_silence(struct snd_pcm_substream *substream, |
651 | int channel, snd_pcm_uframes_t pos, |
652 | snd_pcm_uframes_t count) |
653 | { |
654 | return 0; /* do nothing */ |
655 | } |
656 | |
657 | static struct page *dummy_pcm_page(struct snd_pcm_substream *substream, |
658 | unsigned long offset) |
659 | { |
660 | return virt_to_page(dummy_page[substream->stream]); /* the same page */ |
661 | } |
662 | |
663 | static struct snd_pcm_ops dummy_pcm_ops = { |
664 | .open = dummy_pcm_open, |
665 | .close = dummy_pcm_close, |
666 | .ioctl = snd_pcm_lib_ioctl, |
667 | .hw_params = dummy_pcm_hw_params, |
668 | .hw_free = dummy_pcm_hw_free, |
669 | .prepare = dummy_pcm_prepare, |
670 | .trigger = dummy_pcm_trigger, |
671 | .pointer = dummy_pcm_pointer, |
672 | }; |
673 | |
674 | static struct snd_pcm_ops dummy_pcm_ops_no_buf = { |
675 | .open = dummy_pcm_open, |
676 | .close = dummy_pcm_close, |
677 | .ioctl = snd_pcm_lib_ioctl, |
678 | .hw_params = dummy_pcm_hw_params, |
679 | .hw_free = dummy_pcm_hw_free, |
680 | .prepare = dummy_pcm_prepare, |
681 | .trigger = dummy_pcm_trigger, |
682 | .pointer = dummy_pcm_pointer, |
683 | .copy = dummy_pcm_copy, |
684 | .silence = dummy_pcm_silence, |
685 | .page = dummy_pcm_page, |
686 | }; |
687 | |
688 | static int __devinit snd_card_dummy_pcm(struct snd_dummy *dummy, int device, |
689 | int substreams) |
690 | { |
691 | struct snd_pcm *pcm; |
692 | struct snd_pcm_ops *ops; |
693 | int err; |
694 | |
695 | err = snd_pcm_new(dummy->card, "Dummy PCM", device, |
696 | substreams, substreams, &pcm); |
697 | if (err < 0) |
698 | return err; |
699 | dummy->pcm = pcm; |
700 | if (fake_buffer) |
701 | ops = &dummy_pcm_ops_no_buf; |
702 | else |
703 | ops = &dummy_pcm_ops; |
704 | snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, ops); |
705 | snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, ops); |
706 | pcm->private_data = dummy; |
707 | pcm->info_flags = 0; |
708 | strcpy(pcm->name, "Dummy PCM"); |
709 | if (!fake_buffer) { |
710 | snd_pcm_lib_preallocate_pages_for_all(pcm, |
711 | SNDRV_DMA_TYPE_CONTINUOUS, |
712 | snd_dma_continuous_data(GFP_KERNEL), |
713 | 0, 64*1024); |
714 | } |
715 | return 0; |
716 | } |
717 | |
718 | /* |
719 | * mixer interface |
720 | */ |
721 | |
722 | #define DUMMY_VOLUME(xname, xindex, addr) \ |
723 | { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, \ |
724 | .access = SNDRV_CTL_ELEM_ACCESS_READWRITE | SNDRV_CTL_ELEM_ACCESS_TLV_READ, \ |
725 | .name = xname, .index = xindex, \ |
726 | .info = snd_dummy_volume_info, \ |
727 | .get = snd_dummy_volume_get, .put = snd_dummy_volume_put, \ |
728 | .private_value = addr, \ |
729 | .tlv = { .p = db_scale_dummy } } |
730 | |
731 | static int snd_dummy_volume_info(struct snd_kcontrol *kcontrol, |
732 | struct snd_ctl_elem_info *uinfo) |
733 | { |
734 | uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; |
735 | uinfo->count = 2; |
736 | uinfo->value.integer.min = -50; |
737 | uinfo->value.integer.max = 100; |
738 | return 0; |
739 | } |
740 | |
741 | static int snd_dummy_volume_get(struct snd_kcontrol *kcontrol, |
742 | struct snd_ctl_elem_value *ucontrol) |
743 | { |
744 | struct snd_dummy *dummy = snd_kcontrol_chip(kcontrol); |
745 | int addr = kcontrol->private_value; |
746 | |
747 | spin_lock_irq(&dummy->mixer_lock); |
748 | ucontrol->value.integer.value[0] = dummy->mixer_volume[addr][0]; |
749 | ucontrol->value.integer.value[1] = dummy->mixer_volume[addr][1]; |
750 | spin_unlock_irq(&dummy->mixer_lock); |
751 | return 0; |
752 | } |
753 | |
754 | static int snd_dummy_volume_put(struct snd_kcontrol *kcontrol, |
755 | struct snd_ctl_elem_value *ucontrol) |
756 | { |
757 | struct snd_dummy *dummy = snd_kcontrol_chip(kcontrol); |
758 | int change, addr = kcontrol->private_value; |
759 | int left, right; |
760 | |
761 | left = ucontrol->value.integer.value[0]; |
762 | if (left < -50) |
763 | left = -50; |
764 | if (left > 100) |
765 | left = 100; |
766 | right = ucontrol->value.integer.value[1]; |
767 | if (right < -50) |
768 | right = -50; |
769 | if (right > 100) |
770 | right = 100; |
771 | spin_lock_irq(&dummy->mixer_lock); |
772 | change = dummy->mixer_volume[addr][0] != left || |
773 | dummy->mixer_volume[addr][1] != right; |
774 | dummy->mixer_volume[addr][0] = left; |
775 | dummy->mixer_volume[addr][1] = right; |
776 | spin_unlock_irq(&dummy->mixer_lock); |
777 | return change; |
778 | } |
779 | |
780 | static const DECLARE_TLV_DB_SCALE(db_scale_dummy, -4500, 30, 0); |
781 | |
782 | #define DUMMY_CAPSRC(xname, xindex, addr) \ |
783 | { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \ |
784 | .info = snd_dummy_capsrc_info, \ |
785 | .get = snd_dummy_capsrc_get, .put = snd_dummy_capsrc_put, \ |
786 | .private_value = addr } |
787 | |
788 | #define snd_dummy_capsrc_info snd_ctl_boolean_stereo_info |
789 | |
790 | static int snd_dummy_capsrc_get(struct snd_kcontrol *kcontrol, |
791 | struct snd_ctl_elem_value *ucontrol) |
792 | { |
793 | struct snd_dummy *dummy = snd_kcontrol_chip(kcontrol); |
794 | int addr = kcontrol->private_value; |
795 | |
796 | spin_lock_irq(&dummy->mixer_lock); |
797 | ucontrol->value.integer.value[0] = dummy->capture_source[addr][0]; |
798 | ucontrol->value.integer.value[1] = dummy->capture_source[addr][1]; |
799 | spin_unlock_irq(&dummy->mixer_lock); |
800 | return 0; |
801 | } |
802 | |
803 | static int snd_dummy_capsrc_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) |
804 | { |
805 | struct snd_dummy *dummy = snd_kcontrol_chip(kcontrol); |
806 | int change, addr = kcontrol->private_value; |
807 | int left, right; |
808 | |
809 | left = ucontrol->value.integer.value[0] & 1; |
810 | right = ucontrol->value.integer.value[1] & 1; |
811 | spin_lock_irq(&dummy->mixer_lock); |
812 | change = dummy->capture_source[addr][0] != left && |
813 | dummy->capture_source[addr][1] != right; |
814 | dummy->capture_source[addr][0] = left; |
815 | dummy->capture_source[addr][1] = right; |
816 | spin_unlock_irq(&dummy->mixer_lock); |
817 | return change; |
818 | } |
819 | |
820 | static struct snd_kcontrol_new snd_dummy_controls[] = { |
821 | DUMMY_VOLUME("Master Volume", 0, MIXER_ADDR_MASTER), |
822 | DUMMY_CAPSRC("Master Capture Switch", 0, MIXER_ADDR_MASTER), |
823 | DUMMY_VOLUME("Synth Volume", 0, MIXER_ADDR_SYNTH), |
824 | DUMMY_CAPSRC("Synth Capture Switch", 0, MIXER_ADDR_SYNTH), |
825 | DUMMY_VOLUME("Line Volume", 0, MIXER_ADDR_LINE), |
826 | DUMMY_CAPSRC("Line Capture Switch", 0, MIXER_ADDR_LINE), |
827 | DUMMY_VOLUME("Mic Volume", 0, MIXER_ADDR_MIC), |
828 | DUMMY_CAPSRC("Mic Capture Switch", 0, MIXER_ADDR_MIC), |
829 | DUMMY_VOLUME("CD Volume", 0, MIXER_ADDR_CD), |
830 | DUMMY_CAPSRC("CD Capture Switch", 0, MIXER_ADDR_CD) |
831 | }; |
832 | |
833 | static int __devinit snd_card_dummy_new_mixer(struct snd_dummy *dummy) |
834 | { |
835 | struct snd_card *card = dummy->card; |
836 | unsigned int idx; |
837 | int err; |
838 | |
839 | spin_lock_init(&dummy->mixer_lock); |
840 | strcpy(card->mixername, "Dummy Mixer"); |
841 | |
842 | for (idx = 0; idx < ARRAY_SIZE(snd_dummy_controls); idx++) { |
843 | err = snd_ctl_add(card, snd_ctl_new1(&snd_dummy_controls[idx], dummy)); |
844 | if (err < 0) |
845 | return err; |
846 | } |
847 | return 0; |
848 | } |
849 | |
850 | #if defined(CONFIG_SND_DEBUG) && defined(CONFIG_PROC_FS) |
851 | /* |
852 | * proc interface |
853 | */ |
854 | static void print_formats(struct snd_dummy *dummy, |
855 | struct snd_info_buffer *buffer) |
856 | { |
857 | int i; |
858 | |
859 | for (i = 0; i < SNDRV_PCM_FORMAT_LAST; i++) { |
860 | if (dummy->pcm_hw.formats & (1ULL << i)) |
861 | snd_iprintf(buffer, " %s", snd_pcm_format_name(i)); |
862 | } |
863 | } |
864 | |
865 | static void print_rates(struct snd_dummy *dummy, |
866 | struct snd_info_buffer *buffer) |
867 | { |
868 | static int rates[] = { |
869 | 5512, 8000, 11025, 16000, 22050, 32000, 44100, 48000, |
870 | 64000, 88200, 96000, 176400, 192000, |
871 | }; |
872 | int i; |
873 | |
874 | if (dummy->pcm_hw.rates & SNDRV_PCM_RATE_CONTINUOUS) |
875 | snd_iprintf(buffer, " continuous"); |
876 | if (dummy->pcm_hw.rates & SNDRV_PCM_RATE_KNOT) |
877 | snd_iprintf(buffer, " knot"); |
878 | for (i = 0; i < ARRAY_SIZE(rates); i++) |
879 | if (dummy->pcm_hw.rates & (1 << i)) |
880 | snd_iprintf(buffer, " %d", rates[i]); |
881 | } |
882 | |
883 | #define get_dummy_int_ptr(dummy, ofs) \ |
884 | (unsigned int *)((char *)&((dummy)->pcm_hw) + (ofs)) |
885 | #define get_dummy_ll_ptr(dummy, ofs) \ |
886 | (unsigned long long *)((char *)&((dummy)->pcm_hw) + (ofs)) |
887 | |
888 | struct dummy_hw_field { |
889 | const char *name; |
890 | const char *format; |
891 | unsigned int offset; |
892 | unsigned int size; |
893 | }; |
894 | #define FIELD_ENTRY(item, fmt) { \ |
895 | .name = #item, \ |
896 | .format = fmt, \ |
897 | .offset = offsetof(struct snd_pcm_hardware, item), \ |
898 | .size = sizeof(dummy_pcm_hardware.item) } |
899 | |
900 | static struct dummy_hw_field fields[] = { |
901 | FIELD_ENTRY(formats, "%#llx"), |
902 | FIELD_ENTRY(rates, "%#x"), |
903 | FIELD_ENTRY(rate_min, "%d"), |
904 | FIELD_ENTRY(rate_max, "%d"), |
905 | FIELD_ENTRY(channels_min, "%d"), |
906 | FIELD_ENTRY(channels_max, "%d"), |
907 | FIELD_ENTRY(buffer_bytes_max, "%ld"), |
908 | FIELD_ENTRY(period_bytes_min, "%ld"), |
909 | FIELD_ENTRY(period_bytes_max, "%ld"), |
910 | FIELD_ENTRY(periods_min, "%d"), |
911 | FIELD_ENTRY(periods_max, "%d"), |
912 | }; |
913 | |
914 | static void dummy_proc_read(struct snd_info_entry *entry, |
915 | struct snd_info_buffer *buffer) |
916 | { |
917 | struct snd_dummy *dummy = entry->private_data; |
918 | int i; |
919 | |
920 | for (i = 0; i < ARRAY_SIZE(fields); i++) { |
921 | snd_iprintf(buffer, "%s ", fields[i].name); |
922 | if (fields[i].size == sizeof(int)) |
923 | snd_iprintf(buffer, fields[i].format, |
924 | *get_dummy_int_ptr(dummy, fields[i].offset)); |
925 | else |
926 | snd_iprintf(buffer, fields[i].format, |
927 | *get_dummy_ll_ptr(dummy, fields[i].offset)); |
928 | if (!strcmp(fields[i].name, "formats")) |
929 | print_formats(dummy, buffer); |
930 | else if (!strcmp(fields[i].name, "rates")) |
931 | print_rates(dummy, buffer); |
932 | snd_iprintf(buffer, "\n"); |
933 | } |
934 | } |
935 | |
936 | static void dummy_proc_write(struct snd_info_entry *entry, |
937 | struct snd_info_buffer *buffer) |
938 | { |
939 | struct snd_dummy *dummy = entry->private_data; |
940 | char line[64]; |
941 | |
942 | while (!snd_info_get_line(buffer, line, sizeof(line))) { |
943 | char item[20]; |
944 | const char *ptr; |
945 | unsigned long long val; |
946 | int i; |
947 | |
948 | ptr = snd_info_get_str(item, line, sizeof(item)); |
949 | for (i = 0; i < ARRAY_SIZE(fields); i++) { |
950 | if (!strcmp(item, fields[i].name)) |
951 | break; |
952 | } |
953 | if (i >= ARRAY_SIZE(fields)) |
954 | continue; |
955 | snd_info_get_str(item, ptr, sizeof(item)); |
956 | if (strict_strtoull(item, 0, &val)) |
957 | continue; |
958 | if (fields[i].size == sizeof(int)) |
959 | *get_dummy_int_ptr(dummy, fields[i].offset) = val; |
960 | else |
961 | *get_dummy_ll_ptr(dummy, fields[i].offset) = val; |
962 | } |
963 | } |
964 | |
965 | static void __devinit dummy_proc_init(struct snd_dummy *chip) |
966 | { |
967 | struct snd_info_entry *entry; |
968 | |
969 | if (!snd_card_proc_new(chip->card, "dummy_pcm", &entry)) { |
970 | snd_info_set_text_ops(entry, chip, dummy_proc_read); |
971 | entry->c.text.write = dummy_proc_write; |
972 | entry->mode |= S_IWUSR; |
973 | entry->private_data = chip; |
974 | } |
975 | } |
976 | #else |
977 | #define dummy_proc_init(x) |
978 | #endif /* CONFIG_SND_DEBUG && CONFIG_PROC_FS */ |
979 | |
980 | static int __devinit snd_dummy_probe(struct platform_device *devptr) |
981 | { |
982 | struct snd_card *card; |
983 | struct snd_dummy *dummy; |
984 | struct dummy_model *m = NULL, **mdl; |
985 | int idx, err; |
986 | int dev = devptr->id; |
987 | |
988 | err = snd_card_create(index[dev], id[dev], THIS_MODULE, |
989 | sizeof(struct snd_dummy), &card); |
990 | if (err < 0) |
991 | return err; |
992 | dummy = card->private_data; |
993 | dummy->card = card; |
994 | for (mdl = dummy_models; *mdl && model[dev]; mdl++) { |
995 | if (strcmp(model[dev], (*mdl)->name) == 0) { |
996 | printk(KERN_INFO |
997 | "snd-dummy: Using model '%s' for card %i\n", |
998 | (*mdl)->name, card->number); |
999 | m = dummy->model = *mdl; |
1000 | break; |
1001 | } |
1002 | } |
1003 | for (idx = 0; idx < MAX_PCM_DEVICES && idx < pcm_devs[dev]; idx++) { |
1004 | if (pcm_substreams[dev] < 1) |
1005 | pcm_substreams[dev] = 1; |
1006 | if (pcm_substreams[dev] > MAX_PCM_SUBSTREAMS) |
1007 | pcm_substreams[dev] = MAX_PCM_SUBSTREAMS; |
1008 | err = snd_card_dummy_pcm(dummy, idx, pcm_substreams[dev]); |
1009 | if (err < 0) |
1010 | goto __nodev; |
1011 | } |
1012 | |
1013 | dummy->pcm_hw = dummy_pcm_hardware; |
1014 | if (m) { |
1015 | if (m->formats) |
1016 | dummy->pcm_hw.formats = m->formats; |
1017 | if (m->buffer_bytes_max) |
1018 | dummy->pcm_hw.buffer_bytes_max = m->buffer_bytes_max; |
1019 | if (m->period_bytes_min) |
1020 | dummy->pcm_hw.period_bytes_min = m->period_bytes_min; |
1021 | if (m->period_bytes_max) |
1022 | dummy->pcm_hw.period_bytes_max = m->period_bytes_max; |
1023 | if (m->periods_min) |
1024 | dummy->pcm_hw.periods_min = m->periods_min; |
1025 | if (m->periods_max) |
1026 | dummy->pcm_hw.periods_max = m->periods_max; |
1027 | if (m->rates) |
1028 | dummy->pcm_hw.rates = m->rates; |
1029 | if (m->rate_min) |
1030 | dummy->pcm_hw.rate_min = m->rate_min; |
1031 | if (m->rate_max) |
1032 | dummy->pcm_hw.rate_max = m->rate_max; |
1033 | if (m->channels_min) |
1034 | dummy->pcm_hw.channels_min = m->channels_min; |
1035 | if (m->channels_max) |
1036 | dummy->pcm_hw.channels_max = m->channels_max; |
1037 | } |
1038 | |
1039 | err = snd_card_dummy_new_mixer(dummy); |
1040 | if (err < 0) |
1041 | goto __nodev; |
1042 | strcpy(card->driver, "Dummy"); |
1043 | strcpy(card->shortname, "Dummy"); |
1044 | sprintf(card->longname, "Dummy %i", dev + 1); |
1045 | |
1046 | dummy_proc_init(dummy); |
1047 | |
1048 | snd_card_set_dev(card, &devptr->dev); |
1049 | |
1050 | err = snd_card_register(card); |
1051 | if (err == 0) { |
1052 | platform_set_drvdata(devptr, card); |
1053 | return 0; |
1054 | } |
1055 | __nodev: |
1056 | snd_card_free(card); |
1057 | return err; |
1058 | } |
1059 | |
1060 | static int __devexit snd_dummy_remove(struct platform_device *devptr) |
1061 | { |
1062 | snd_card_free(platform_get_drvdata(devptr)); |
1063 | platform_set_drvdata(devptr, NULL); |
1064 | return 0; |
1065 | } |
1066 | |
1067 | #ifdef CONFIG_PM |
1068 | static int snd_dummy_suspend(struct platform_device *pdev, pm_message_t state) |
1069 | { |
1070 | struct snd_card *card = platform_get_drvdata(pdev); |
1071 | struct snd_dummy *dummy = card->private_data; |
1072 | |
1073 | snd_power_change_state(card, SNDRV_CTL_POWER_D3hot); |
1074 | snd_pcm_suspend_all(dummy->pcm); |
1075 | return 0; |
1076 | } |
1077 | |
1078 | static int snd_dummy_resume(struct platform_device *pdev) |
1079 | { |
1080 | struct snd_card *card = platform_get_drvdata(pdev); |
1081 | |
1082 | snd_power_change_state(card, SNDRV_CTL_POWER_D0); |
1083 | return 0; |
1084 | } |
1085 | #endif |
1086 | |
1087 | #define SND_DUMMY_DRIVER "snd_dummy" |
1088 | |
1089 | static struct platform_driver snd_dummy_driver = { |
1090 | .probe = snd_dummy_probe, |
1091 | .remove = __devexit_p(snd_dummy_remove), |
1092 | #ifdef CONFIG_PM |
1093 | .suspend = snd_dummy_suspend, |
1094 | .resume = snd_dummy_resume, |
1095 | #endif |
1096 | .driver = { |
1097 | .name = SND_DUMMY_DRIVER |
1098 | }, |
1099 | }; |
1100 | |
1101 | static void snd_dummy_unregister_all(void) |
1102 | { |
1103 | int i; |
1104 | |
1105 | for (i = 0; i < ARRAY_SIZE(devices); ++i) |
1106 | platform_device_unregister(devices[i]); |
1107 | platform_driver_unregister(&snd_dummy_driver); |
1108 | free_fake_buffer(); |
1109 | } |
1110 | |
1111 | static int __init alsa_card_dummy_init(void) |
1112 | { |
1113 | int i, cards, err; |
1114 | |
1115 | err = platform_driver_register(&snd_dummy_driver); |
1116 | if (err < 0) |
1117 | return err; |
1118 | |
1119 | err = alloc_fake_buffer(); |
1120 | if (err < 0) { |
1121 | platform_driver_unregister(&snd_dummy_driver); |
1122 | return err; |
1123 | } |
1124 | |
1125 | cards = 0; |
1126 | for (i = 0; i < SNDRV_CARDS; i++) { |
1127 | struct platform_device *device; |
1128 | if (! enable[i]) |
1129 | continue; |
1130 | device = platform_device_register_simple(SND_DUMMY_DRIVER, |
1131 | i, NULL, 0); |
1132 | if (IS_ERR(device)) |
1133 | continue; |
1134 | if (!platform_get_drvdata(device)) { |
1135 | platform_device_unregister(device); |
1136 | continue; |
1137 | } |
1138 | devices[i] = device; |
1139 | cards++; |
1140 | } |
1141 | if (!cards) { |
1142 | #ifdef MODULE |
1143 | printk(KERN_ERR "Dummy soundcard not found or device busy\n"); |
1144 | #endif |
1145 | snd_dummy_unregister_all(); |
1146 | return -ENODEV; |
1147 | } |
1148 | return 0; |
1149 | } |
1150 | |
1151 | static void __exit alsa_card_dummy_exit(void) |
1152 | { |
1153 | snd_dummy_unregister_all(); |
1154 | } |
1155 | |
1156 | module_init(alsa_card_dummy_init) |
1157 | module_exit(alsa_card_dummy_exit) |
1158 |
Branches:
ben-wpan
ben-wpan-stefan
javiroman/ks7010
jz-2.6.34
jz-2.6.34-rc5
jz-2.6.34-rc6
jz-2.6.34-rc7
jz-2.6.35
jz-2.6.36
jz-2.6.37
jz-2.6.38
jz-2.6.39
jz-3.0
jz-3.1
jz-3.11
jz-3.12
jz-3.13
jz-3.15
jz-3.16
jz-3.18-dt
jz-3.2
jz-3.3
jz-3.4
jz-3.5
jz-3.6
jz-3.6-rc2-pwm
jz-3.9
jz-3.9-clk
jz-3.9-rc8
jz47xx
jz47xx-2.6.38
master
Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9