source: GPL/trunk/alsa-kernel/drivers/dummy.c@ 424

Last change on this file since 424 was 410, checked in by Paul Smedley, 17 years ago

Update ALSA core to 1.0.19 level
File size: 20.7 KB
Line 
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/moduleparam.h>
29#include <sound/core.h>
30#include <sound/control.h>
31#include <sound/tlv.h>
32#include <sound/pcm.h>
33#include <sound/rawmidi.h>
34#include <sound/initval.h>
35
36MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
37MODULE_DESCRIPTION("Dummy soundcard (/dev/null)");
38MODULE_LICENSE("GPL");
39MODULE_SUPPORTED_DEVICE("{{ALSA,Dummy soundcard}}");
40
41#define MAX_PCM_DEVICES 4
42#define MAX_PCM_SUBSTREAMS 16
43#define MAX_MIDI_DEVICES 2
44
45#if 0 /* emu10k1 emulation */
46#define MAX_BUFFER_SIZE (128 * 1024)
47static int emu10k1_playback_constraints(struct snd_pcm_runtime *runtime)
48{
49 int err;
50 err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
51 if (err < 0)
52 return err;
53 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 256, UINT_MAX);
54 if (err < 0)
55 return err;
56 return 0;
57}
58#define add_playback_constraints emu10k1_playback_constraints
59#endif
60
61#if 0 /* RME9652 emulation */
62#define MAX_BUFFER_SIZE (26 * 64 * 1024)
63#define USE_FORMATS SNDRV_PCM_FMTBIT_S32_LE
64#define USE_CHANNELS_MIN 26
65#define USE_CHANNELS_MAX 26
66#define USE_PERIODS_MIN 2
67#define USE_PERIODS_MAX 2
68#endif
69
70#if 0 /* ICE1712 emulation */
71#define MAX_BUFFER_SIZE (256 * 1024)
72#define USE_FORMATS SNDRV_PCM_FMTBIT_S32_LE
73#define USE_CHANNELS_MIN 10
74#define USE_CHANNELS_MAX 10
75#define USE_PERIODS_MIN 1
76#define USE_PERIODS_MAX 1024
77#endif
78
79#if 0 /* UDA1341 emulation */
80#define MAX_BUFFER_SIZE (16380)
81#define USE_FORMATS SNDRV_PCM_FMTBIT_S16_LE
82#define USE_CHANNELS_MIN 2
83#define USE_CHANNELS_MAX 2
84#define USE_PERIODS_MIN 2
85#define USE_PERIODS_MAX 255
86#endif
87
88#if 0 /* simple AC97 bridge (intel8x0) with 48kHz AC97 only codec */
89#define USE_FORMATS SNDRV_PCM_FMTBIT_S16_LE
90#define USE_CHANNELS_MIN 2
91#define USE_CHANNELS_MAX 2
92#define USE_RATE SNDRV_PCM_RATE_48000
93#define USE_RATE_MIN 48000
94#define USE_RATE_MAX 48000
95#endif
96
97#if 0 /* CA0106 */
98#define USE_FORMATS SNDRV_PCM_FMTBIT_S16_LE
99#define USE_CHANNELS_MIN 2
100#define USE_CHANNELS_MAX 2
101#define USE_RATE (SNDRV_PCM_RATE_48000|SNDRV_PCM_RATE_96000|SNDRV_PCM_RATE_192000)
102#define USE_RATE_MIN 48000
103#define USE_RATE_MAX 192000
104#define MAX_BUFFER_SIZE ((65536-64)*8)
105#define MAX_PERIOD_SIZE (65536-64)
106#define USE_PERIODS_MIN 2
107#define USE_PERIODS_MAX 8
108#endif
109
110
111/* defaults */
112#ifndef MAX_BUFFER_SIZE
113#define MAX_BUFFER_SIZE (64*1024)
114#endif
115#ifndef MAX_PERIOD_SIZE
116#define MAX_PERIOD_SIZE MAX_BUFFER_SIZE
117#endif
118#ifndef USE_FORMATS
119#define USE_FORMATS (SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE)
120#endif
121#ifndef USE_RATE
122#define USE_RATE SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_48000
123#define USE_RATE_MIN 5500
124#define USE_RATE_MAX 48000
125#endif
126#ifndef USE_CHANNELS_MIN
127#define USE_CHANNELS_MIN 1
128#endif
129#ifndef USE_CHANNELS_MAX
130#define USE_CHANNELS_MAX 2
131#endif
132#ifndef USE_PERIODS_MIN
133#define USE_PERIODS_MIN 1
134#endif
135#ifndef USE_PERIODS_MAX
136#define USE_PERIODS_MAX 1024
137#endif
138#ifndef add_playback_constraints
139#define add_playback_constraints(x) 0
140#endif
141#ifndef add_capture_constraints
142#define add_capture_constraints(x) 0
143#endif
144
145static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-MAX */
146static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* ID for this card */
147static int enable[SNDRV_CARDS] = {1, [1 ... (SNDRV_CARDS - 1)] = 0};
148static int pcm_devs[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 1};
149static int pcm_substreams[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 8};
150//static int midi_devs[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 2};
151
152module_param_array(index, int, NULL, 0444);
153MODULE_PARM_DESC(index, "Index value for dummy soundcard.");
154module_param_array(id, charp, NULL, 0444);
155MODULE_PARM_DESC(id, "ID string for dummy soundcard.");
156module_param_array(enable, bool, NULL, 0444);
157MODULE_PARM_DESC(enable, "Enable this dummy soundcard.");
158module_param_array(pcm_devs, int, NULL, 0444);
159MODULE_PARM_DESC(pcm_devs, "PCM devices # (0-4) for dummy driver.");
160module_param_array(pcm_substreams, int, NULL, 0444);
161MODULE_PARM_DESC(pcm_substreams, "PCM substreams # (1-16) for dummy driver.");
162module_param_array(midi_devs, int, NULL, 0444);
163MODULE_PARM_DESC(midi_devs, "MIDI devices # (0-2) for dummy driver.");
164
165static struct platform_device *devices[SNDRV_CARDS];
166
167#define MIXER_ADDR_MASTER 0
168#define MIXER_ADDR_LINE 1
169#define MIXER_ADDR_MIC 2
170#define MIXER_ADDR_SYNTH 3
171#define MIXER_ADDR_CD 4
172#define MIXER_ADDR_LAST 4
173
174struct snd_dummy {
175 struct snd_card *card;
176 struct snd_pcm *pcm;
177 spinlock_t mixer_lock;
178 int mixer_volume[MIXER_ADDR_LAST+1][2];
179 int capture_source[MIXER_ADDR_LAST+1][2];
180};
181
182struct snd_dummy_pcm {
183 struct snd_dummy *dummy;
184 spinlock_t lock;
185 struct timer_list timer;
186 unsigned int pcm_buffer_size;
187 unsigned int pcm_period_size;
188 unsigned int pcm_bps; /* bytes per second */
189 unsigned int pcm_hz; /* HZ */
190 unsigned int pcm_irq_pos; /* IRQ position */
191 unsigned int pcm_buf_pos; /* position in buffer */
192 struct snd_pcm_substream *substream;
193};
194
195
196static inline void snd_card_dummy_pcm_timer_start(struct snd_dummy_pcm *dpcm)
197{
198 dpcm->timer.expires = 1 + jiffies;
199 add_timer(&dpcm->timer);
200}
201
202static inline void snd_card_dummy_pcm_timer_stop(struct snd_dummy_pcm *dpcm)
203{
204 del_timer(&dpcm->timer);
205}
206
207static int snd_card_dummy_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
208{
209 struct snd_pcm_runtime *runtime = substream->runtime;
210 struct snd_dummy_pcm *dpcm = runtime->private_data;
211 int err = 0;
212
213 spin_lock(&dpcm->lock);
214 switch (cmd) {
215 case SNDRV_PCM_TRIGGER_START:
216 case SNDRV_PCM_TRIGGER_RESUME:
217 snd_card_dummy_pcm_timer_start(dpcm);
218 break;
219 case SNDRV_PCM_TRIGGER_STOP:
220 case SNDRV_PCM_TRIGGER_SUSPEND:
221 snd_card_dummy_pcm_timer_stop(dpcm);
222 break;
223 default:
224 err = -EINVAL;
225 break;
226 }
227 spin_unlock(&dpcm->lock);
228 return 0;
229}
230
231static int snd_card_dummy_pcm_prepare(struct snd_pcm_substream *substream)
232{
233 struct snd_pcm_runtime *runtime = substream->runtime;
234 struct snd_dummy_pcm *dpcm = runtime->private_data;
235 int bps;
236
237 bps = snd_pcm_format_width(runtime->format) * runtime->rate *
238 runtime->channels / 8;
239
240 if (bps <= 0)
241 return -EINVAL;
242
243 dpcm->pcm_bps = bps;
244 dpcm->pcm_hz = HZ;
245 dpcm->pcm_buffer_size = snd_pcm_lib_buffer_bytes(substream);
246 dpcm->pcm_period_size = snd_pcm_lib_period_bytes(substream);
247 dpcm->pcm_irq_pos = 0;
248 dpcm->pcm_buf_pos = 0;
249
250 snd_pcm_format_set_silence(runtime->format, runtime->dma_area,
251 bytes_to_samples(runtime, runtime->dma_bytes));
252
253 return 0;
254}
255
256static void snd_card_dummy_pcm_timer_function(unsigned long data)
257{
258 struct snd_dummy_pcm *dpcm = (struct snd_dummy_pcm *)data;
259 unsigned long flags;
260
261 spin_lock_irqsave(&dpcm->lock, flags);
262 dpcm->timer.expires = 1 + jiffies;
263 add_timer(&dpcm->timer);
264 dpcm->pcm_irq_pos += dpcm->pcm_bps;
265 dpcm->pcm_buf_pos += dpcm->pcm_bps;
266 dpcm->pcm_buf_pos %= dpcm->pcm_buffer_size * dpcm->pcm_hz;
267 if (dpcm->pcm_irq_pos >= dpcm->pcm_period_size * dpcm->pcm_hz) {
268 dpcm->pcm_irq_pos %= dpcm->pcm_period_size * dpcm->pcm_hz;
269 spin_unlock_irqrestore(&dpcm->lock, flags);
270 snd_pcm_period_elapsed(dpcm->substream);
271 } else
272 spin_unlock_irqrestore(&dpcm->lock, flags);
273}
274
275static snd_pcm_uframes_t snd_card_dummy_pcm_pointer(struct snd_pcm_substream *substream)
276{
277 struct snd_pcm_runtime *runtime = substream->runtime;
278 struct snd_dummy_pcm *dpcm = runtime->private_data;
279
280 return bytes_to_frames(runtime, dpcm->pcm_buf_pos / dpcm->pcm_hz);
281}
282
283static struct snd_pcm_hardware snd_card_dummy_playback =
284{
285 .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
286 SNDRV_PCM_INFO_RESUME | SNDRV_PCM_INFO_MMAP_VALID),
287 .formats = USE_FORMATS,
288 .rates = USE_RATE,
289 .rate_min = USE_RATE_MIN,
290 .rate_max = USE_RATE_MAX,
291 .channels_min = USE_CHANNELS_MIN,
292 .channels_max = USE_CHANNELS_MAX,
293 .buffer_bytes_max = MAX_BUFFER_SIZE,
294 .period_bytes_min = 64,
295 .period_bytes_max = MAX_PERIOD_SIZE,
296 .periods_min = USE_PERIODS_MIN,
297 .periods_max = USE_PERIODS_MAX,
298 .fifo_size = 0,
299};
300
301static struct snd_pcm_hardware snd_card_dummy_capture =
302{
303 .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
304 SNDRV_PCM_INFO_RESUME | SNDRV_PCM_INFO_MMAP_VALID),
305 .formats = USE_FORMATS,
306 .rates = USE_RATE,
307 .rate_min = USE_RATE_MIN,
308 .rate_max = USE_RATE_MAX,
309 .channels_min = USE_CHANNELS_MIN,
310 .channels_max = USE_CHANNELS_MAX,
311 .buffer_bytes_max = MAX_BUFFER_SIZE,
312 .period_bytes_min = 64,
313 .period_bytes_max = MAX_PERIOD_SIZE,
314 .periods_min = USE_PERIODS_MIN,
315 .periods_max = USE_PERIODS_MAX,
316 .fifo_size = 0,
317};
318
319static void snd_card_dummy_runtime_free(struct snd_pcm_runtime *runtime)
320{
321 kfree(runtime->private_data);
322}
323
324static int snd_card_dummy_hw_params(struct snd_pcm_substream *substream,
325 struct snd_pcm_hw_params *hw_params)
326{
327 return snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params));
328}
329
330static int snd_card_dummy_hw_free(struct snd_pcm_substream *substream)
331{
332 return snd_pcm_lib_free_pages(substream);
333}
334
335static struct snd_dummy_pcm *new_pcm_stream(struct snd_pcm_substream *substream)
336{
337 struct snd_dummy_pcm *dpcm;
338
339 dpcm = kzalloc(sizeof(*dpcm), GFP_KERNEL);
340 if (! dpcm)
341 return dpcm;
342 init_timer(&dpcm->timer);
343 dpcm->timer.data = (unsigned long) dpcm;
344 dpcm->timer.function = snd_card_dummy_pcm_timer_function;
345 spin_lock_init(&dpcm->lock);
346 dpcm->substream = substream;
347 return dpcm;
348}
349
350static int snd_card_dummy_playback_open(struct snd_pcm_substream *substream)
351{
352 struct snd_pcm_runtime *runtime = substream->runtime;
353 struct snd_dummy_pcm *dpcm;
354 int err;
355
356 if ((dpcm = new_pcm_stream(substream)) == NULL)
357 return -ENOMEM;
358 runtime->private_data = dpcm;
359 /* makes the infrastructure responsible for freeing dpcm */
360 runtime->private_free = snd_card_dummy_runtime_free;
361 runtime->hw = snd_card_dummy_playback;
362 if (substream->pcm->device & 1) {
363 runtime->hw.info &= ~SNDRV_PCM_INFO_INTERLEAVED;
364 runtime->hw.info |= SNDRV_PCM_INFO_NONINTERLEAVED;
365 }
366 if (substream->pcm->device & 2)
367 runtime->hw.info &= ~(SNDRV_PCM_INFO_MMAP|SNDRV_PCM_INFO_MMAP_VALID);
368 err = add_playback_constraints(runtime);
369 if (err < 0)
370 return err;
371
372 return 0;
373}
374
375static int snd_card_dummy_capture_open(struct snd_pcm_substream *substream)
376{
377 struct snd_pcm_runtime *runtime = substream->runtime;
378 struct snd_dummy_pcm *dpcm;
379 int err;
380
381 if ((dpcm = new_pcm_stream(substream)) == NULL)
382 return -ENOMEM;
383 runtime->private_data = dpcm;
384 /* makes the infrastructure responsible for freeing dpcm */
385 runtime->private_free = snd_card_dummy_runtime_free;
386 runtime->hw = snd_card_dummy_capture;
387 if (substream->pcm->device == 1) {
388 runtime->hw.info &= ~SNDRV_PCM_INFO_INTERLEAVED;
389 runtime->hw.info |= SNDRV_PCM_INFO_NONINTERLEAVED;
390 }
391 if (substream->pcm->device & 2)
392 runtime->hw.info &= ~(SNDRV_PCM_INFO_MMAP|SNDRV_PCM_INFO_MMAP_VALID);
393 err = add_capture_constraints(runtime);
394 if (err < 0)
395 return err;
396
397 return 0;
398}
399
400static int snd_card_dummy_playback_close(struct snd_pcm_substream *substream)
401{
402 return 0;
403}
404
405static int snd_card_dummy_capture_close(struct snd_pcm_substream *substream)
406{
407 return 0;
408}
409
410static struct snd_pcm_ops snd_card_dummy_playback_ops = {
411 .open = snd_card_dummy_playback_open,
412 .close = snd_card_dummy_playback_close,
413 .ioctl = snd_pcm_lib_ioctl,
414 .hw_params = snd_card_dummy_hw_params,
415 .hw_free = snd_card_dummy_hw_free,
416 .prepare = snd_card_dummy_pcm_prepare,
417 .trigger = snd_card_dummy_pcm_trigger,
418 .pointer = snd_card_dummy_pcm_pointer,
419};
420
421static struct snd_pcm_ops snd_card_dummy_capture_ops = {
422 .open = snd_card_dummy_capture_open,
423 .close = snd_card_dummy_capture_close,
424 .ioctl = snd_pcm_lib_ioctl,
425 .hw_params = snd_card_dummy_hw_params,
426 .hw_free = snd_card_dummy_hw_free,
427 .prepare = snd_card_dummy_pcm_prepare,
428 .trigger = snd_card_dummy_pcm_trigger,
429 .pointer = snd_card_dummy_pcm_pointer,
430};
431
432static int __devinit snd_card_dummy_pcm(struct snd_dummy *dummy, int device,
433 int substreams)
434{
435 struct snd_pcm *pcm;
436 int err;
437
438 err = snd_pcm_new(dummy->card, "Dummy PCM", device,
439 substreams, substreams, &pcm);
440 if (err < 0)
441 return err;
442 dummy->pcm = pcm;
443 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_card_dummy_playback_ops);
444 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_card_dummy_capture_ops);
445 pcm->private_data = dummy;
446 pcm->info_flags = 0;
447 strcpy(pcm->name, "Dummy PCM");
448 snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_CONTINUOUS,
449 snd_dma_continuous_data(GFP_KERNEL),
450 0, 64*1024);
451 return 0;
452}
453
454#define DUMMY_VOLUME(xname, xindex, addr) \
455{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, \
456 .access = SNDRV_CTL_ELEM_ACCESS_READWRITE | SNDRV_CTL_ELEM_ACCESS_TLV_READ, \
457 .name = xname, .index = xindex, \
458 .info = snd_dummy_volume_info, \
459 .get = snd_dummy_volume_get, .put = snd_dummy_volume_put, \
460 .private_value = addr, \
461 .tlv = { .p = db_scale_dummy } }
462
463static int snd_dummy_volume_info(struct snd_kcontrol *kcontrol,
464 struct snd_ctl_elem_info *uinfo)
465{
466 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
467 uinfo->count = 2;
468 uinfo->value.integer.min = -50;
469 uinfo->value.integer.max = 100;
470 return 0;
471}
472
473static int snd_dummy_volume_get(struct snd_kcontrol *kcontrol,
474 struct snd_ctl_elem_value *ucontrol)
475{
476 struct snd_dummy *dummy = snd_kcontrol_chip(kcontrol);
477 int addr = kcontrol->private_value;
478
479 spin_lock_irq(&dummy->mixer_lock);
480 ucontrol->value.integer.value[0] = dummy->mixer_volume[addr][0];
481 ucontrol->value.integer.value[1] = dummy->mixer_volume[addr][1];
482 spin_unlock_irq(&dummy->mixer_lock);
483 return 0;
484}
485
486static int snd_dummy_volume_put(struct snd_kcontrol *kcontrol,
487 struct snd_ctl_elem_value *ucontrol)
488{
489 struct snd_dummy *dummy = snd_kcontrol_chip(kcontrol);
490 int change, addr = kcontrol->private_value;
491 int left, right;
492
493 left = ucontrol->value.integer.value[0];
494 if (left < -50)
495 left = -50;
496 if (left > 100)
497 left = 100;
498 right = ucontrol->value.integer.value[1];
499 if (right < -50)
500 right = -50;
501 if (right > 100)
502 right = 100;
503 spin_lock_irq(&dummy->mixer_lock);
504 change = dummy->mixer_volume[addr][0] != left ||
505 dummy->mixer_volume[addr][1] != right;
506 dummy->mixer_volume[addr][0] = left;
507 dummy->mixer_volume[addr][1] = right;
508 spin_unlock_irq(&dummy->mixer_lock);
509 return change;
510}
511
512static const DECLARE_TLV_DB_SCALE(db_scale_dummy, -4500, 30, 0);
513
514#define DUMMY_CAPSRC(xname, xindex, addr) \
515{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
516 .info = snd_dummy_capsrc_info, \
517 .get = snd_dummy_capsrc_get, .put = snd_dummy_capsrc_put, \
518 .private_value = addr }
519
520#define snd_dummy_capsrc_info snd_ctl_boolean_stereo_info
521
522static int snd_dummy_capsrc_get(struct snd_kcontrol *kcontrol,
523 struct snd_ctl_elem_value *ucontrol)
524{
525 struct snd_dummy *dummy = snd_kcontrol_chip(kcontrol);
526 int addr = kcontrol->private_value;
527
528 spin_lock_irq(&dummy->mixer_lock);
529 ucontrol->value.integer.value[0] = dummy->capture_source[addr][0];
530 ucontrol->value.integer.value[1] = dummy->capture_source[addr][1];
531 spin_unlock_irq(&dummy->mixer_lock);
532 return 0;
533}
534
535static int snd_dummy_capsrc_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
536{
537 struct snd_dummy *dummy = snd_kcontrol_chip(kcontrol);
538 int change, addr = kcontrol->private_value;
539 int left, right;
540
541 left = ucontrol->value.integer.value[0] & 1;
542 right = ucontrol->value.integer.value[1] & 1;
543 spin_lock_irq(&dummy->mixer_lock);
544 change = dummy->capture_source[addr][0] != left &&
545 dummy->capture_source[addr][1] != right;
546 dummy->capture_source[addr][0] = left;
547 dummy->capture_source[addr][1] = right;
548 spin_unlock_irq(&dummy->mixer_lock);
549 return change;
550}
551
552static struct snd_kcontrol_new snd_dummy_controls[] = {
553DUMMY_VOLUME("Master Volume", 0, MIXER_ADDR_MASTER),
554DUMMY_CAPSRC("Master Capture Switch", 0, MIXER_ADDR_MASTER),
555DUMMY_VOLUME("Synth Volume", 0, MIXER_ADDR_SYNTH),
556DUMMY_CAPSRC("Synth Capture Switch", 0, MIXER_ADDR_SYNTH),
557DUMMY_VOLUME("Line Volume", 0, MIXER_ADDR_LINE),
558DUMMY_CAPSRC("Line Capture Switch", 0, MIXER_ADDR_LINE),
559DUMMY_VOLUME("Mic Volume", 0, MIXER_ADDR_MIC),
560DUMMY_CAPSRC("Mic Capture Switch", 0, MIXER_ADDR_MIC),
561DUMMY_VOLUME("CD Volume", 0, MIXER_ADDR_CD),
562DUMMY_CAPSRC("CD Capture Switch", 0, MIXER_ADDR_CD)
563};
564
565static int __devinit snd_card_dummy_new_mixer(struct snd_dummy *dummy)
566{
567 struct snd_card *card = dummy->card;
568 unsigned int idx;
569 int err;
570
571 if (snd_BUG_ON(!dummy))
572 return -EINVAL;
573 spin_lock_init(&dummy->mixer_lock);
574 strcpy(card->mixername, "Dummy Mixer");
575
576 for (idx = 0; idx < ARRAY_SIZE(snd_dummy_controls); idx++) {
577 err = snd_ctl_add(card, snd_ctl_new1(&snd_dummy_controls[idx], dummy));
578 if (err < 0)
579 return err;
580 }
581 return 0;
582}
583
584static int __devinit snd_dummy_probe(struct platform_device *devptr)
585{
586 struct snd_card *card;
587 struct snd_dummy *dummy;
588 int idx, err;
589 int dev = devptr->id;
590
591 err = snd_card_create(index[dev], id[dev], THIS_MODULE,
592 sizeof(struct snd_dummy), &card);
593 if (err < 0)
594 return err;
595 dummy = card->private_data;
596 dummy->card = card;
597 for (idx = 0; idx < MAX_PCM_DEVICES && idx < pcm_devs[dev]; idx++) {
598 if (pcm_substreams[dev] < 1)
599 pcm_substreams[dev] = 1;
600 if (pcm_substreams[dev] > MAX_PCM_SUBSTREAMS)
601 pcm_substreams[dev] = MAX_PCM_SUBSTREAMS;
602 err = snd_card_dummy_pcm(dummy, idx, pcm_substreams[dev]);
603 if (err < 0)
604 goto __nodev;
605 }
606 err = snd_card_dummy_new_mixer(dummy);
607 if (err < 0)
608 goto __nodev;
609 strcpy(card->driver, "Dummy");
610 strcpy(card->shortname, "Dummy");
611 sprintf(card->longname, "Dummy %i", dev + 1);
612
613 snd_card_set_dev(card, &devptr->dev);
614
615 err = snd_card_register(card);
616 if (err == 0) {
617 platform_set_drvdata(devptr, card);
618 return 0;
619 }
620 __nodev:
621 snd_card_free(card);
622 return err;
623}
624
625static int __devexit snd_dummy_remove(struct platform_device *devptr)
626{
627 snd_card_free(platform_get_drvdata(devptr));
628 platform_set_drvdata(devptr, NULL);
629 return 0;
630}
631
632#ifdef CONFIG_PM
633static int snd_dummy_suspend(struct platform_device *pdev, pm_message_t state)
634{
635 struct snd_card *card = platform_get_drvdata(pdev);
636 struct snd_dummy *dummy = card->private_data;
637
638 snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
639 snd_pcm_suspend_all(dummy->pcm);
640 return 0;
641}
642
643static int snd_dummy_resume(struct platform_device *pdev)
644{
645 struct snd_card *card = platform_get_drvdata(pdev);
646
647 snd_power_change_state(card, SNDRV_CTL_POWER_D0);
648 return 0;
649}
650#endif
651
652#define SND_DUMMY_DRIVER "snd_dummy"
653
654static struct platform_driver snd_dummy_driver = {
655 .probe = snd_dummy_probe,
656 .remove = __devexit_p(snd_dummy_remove),
657#ifdef CONFIG_PM
658 .suspend = snd_dummy_suspend,
659 .resume = snd_dummy_resume,
660#endif
661 .driver = {
662 .name = SND_DUMMY_DRIVER
663 },
664};
665
666static void snd_dummy_unregister_all(void)
667{
668 int i;
669
670 for (i = 0; i < ARRAY_SIZE(devices); ++i)
671 platform_device_unregister(devices[i]);
672 platform_driver_unregister(&snd_dummy_driver);
673}
674
675static int __init alsa_card_dummy_init(void)
676{
677 int i, cards, err;
678
679 err = platform_driver_register(&snd_dummy_driver);
680 if (err < 0)
681 return err;
682
683 cards = 0;
684 for (i = 0; i < SNDRV_CARDS; i++) {
685 struct platform_device *device;
686 if (! enable[i])
687 continue;
688 device = platform_device_register_simple(SND_DUMMY_DRIVER,
689 i, NULL, 0);
690 if (IS_ERR(device))
691 continue;
692 if (!platform_get_drvdata(device)) {
693 platform_device_unregister(device);
694 continue;
695 }
696 devices[i] = device;
697 cards++;
698 }
699 if (!cards) {
700#ifdef MODULE
701 printk(KERN_ERR "Dummy soundcard not found or device busy\n");
702#endif
703 snd_dummy_unregister_all();
704 return -ENODEV;
705 }
706 return 0;
707}
708
709static void __exit alsa_card_dummy_exit(void)
710{
711 snd_dummy_unregister_all();
712}
713
714module_init(alsa_card_dummy_init)
715module_exit(alsa_card_dummy_exit)
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