[ALSA] unregister platform devices
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / sound / drivers / dummy.c
blob96d207051628390884914933477f95d707128a68
1 /*
2 * Dummy soundcard
3 * Copyright (c) by Jaroslav Kysela <perex@suse.cz>
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.
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.
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
21 #include <sound/driver.h>
22 #include <linux/init.h>
23 #include <linux/err.h>
24 #include <linux/platform_device.h>
25 #include <linux/jiffies.h>
26 #include <linux/slab.h>
27 #include <linux/time.h>
28 #include <linux/wait.h>
29 #include <linux/moduleparam.h>
30 #include <sound/core.h>
31 #include <sound/control.h>
32 #include <sound/pcm.h>
33 #include <sound/rawmidi.h>
34 #include <sound/initval.h>
36 MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>");
37 MODULE_DESCRIPTION("Dummy soundcard (/dev/null)");
38 MODULE_LICENSE("GPL");
39 MODULE_SUPPORTED_DEVICE("{{ALSA,Dummy soundcard}}");
41 #define MAX_PCM_DEVICES 4
42 #define MAX_PCM_SUBSTREAMS 16
43 #define MAX_MIDI_DEVICES 2
45 #if 0 /* emu10k1 emulation */
46 #define MAX_BUFFER_SIZE (128 * 1024)
47 static int emu10k1_playback_constraints(struct snd_pcm_runtime *runtime)
49 int err;
50 if ((err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
51 return err;
52 if ((err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 256, UINT_MAX)) < 0)
53 return err;
54 return 0;
56 #define add_playback_constraints emu10k1_playback_constraints
57 #endif
59 #if 0 /* RME9652 emulation */
60 #define MAX_BUFFER_SIZE (26 * 64 * 1024)
61 #define USE_FORMATS SNDRV_PCM_FMTBIT_S32_LE
62 #define USE_CHANNELS_MIN 26
63 #define USE_CHANNELS_MAX 26
64 #define USE_PERIODS_MIN 2
65 #define USE_PERIODS_MAX 2
66 #endif
68 #if 0 /* ICE1712 emulation */
69 #define MAX_BUFFER_SIZE (256 * 1024)
70 #define USE_FORMATS SNDRV_PCM_FMTBIT_S32_LE
71 #define USE_CHANNELS_MIN 10
72 #define USE_CHANNELS_MAX 10
73 #define USE_PERIODS_MIN 1
74 #define USE_PERIODS_MAX 1024
75 #endif
77 #if 0 /* UDA1341 emulation */
78 #define MAX_BUFFER_SIZE (16380)
79 #define USE_FORMATS SNDRV_PCM_FMTBIT_S16_LE
80 #define USE_CHANNELS_MIN 2
81 #define USE_CHANNELS_MAX 2
82 #define USE_PERIODS_MIN 2
83 #define USE_PERIODS_MAX 255
84 #endif
86 #if 0 /* simple AC97 bridge (intel8x0) with 48kHz AC97 only codec */
87 #define USE_FORMATS SNDRV_PCM_FMTBIT_S16_LE
88 #define USE_CHANNELS_MIN 2
89 #define USE_CHANNELS_MAX 2
90 #define USE_RATE SNDRV_PCM_RATE_48000
91 #define USE_RATE_MIN 48000
92 #define USE_RATE_MAX 48000
93 #endif
96 /* defaults */
97 #ifndef MAX_BUFFER_SIZE
98 #define MAX_BUFFER_SIZE (64*1024)
99 #endif
100 #ifndef USE_FORMATS
101 #define USE_FORMATS (SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE)
102 #endif
103 #ifndef USE_RATE
104 #define USE_RATE SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_48000
105 #define USE_RATE_MIN 5500
106 #define USE_RATE_MAX 48000
107 #endif
108 #ifndef USE_CHANNELS_MIN
109 #define USE_CHANNELS_MIN 1
110 #endif
111 #ifndef USE_CHANNELS_MAX
112 #define USE_CHANNELS_MAX 2
113 #endif
114 #ifndef USE_PERIODS_MIN
115 #define USE_PERIODS_MIN 1
116 #endif
117 #ifndef USE_PERIODS_MAX
118 #define USE_PERIODS_MAX 1024
119 #endif
120 #ifndef add_playback_constraints
121 #define add_playback_constraints(x) 0
122 #endif
123 #ifndef add_capture_constraints
124 #define add_capture_constraints(x) 0
125 #endif
127 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-MAX */
128 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* ID for this card */
129 static int enable[SNDRV_CARDS] = {1, [1 ... (SNDRV_CARDS - 1)] = 0};
130 static int pcm_devs[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 1};
131 static int pcm_substreams[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 8};
132 //static int midi_devs[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 2};
134 module_param_array(index, int, NULL, 0444);
135 MODULE_PARM_DESC(index, "Index value for dummy soundcard.");
136 module_param_array(id, charp, NULL, 0444);
137 MODULE_PARM_DESC(id, "ID string for dummy soundcard.");
138 module_param_array(enable, bool, NULL, 0444);
139 MODULE_PARM_DESC(enable, "Enable this dummy soundcard.");
140 module_param_array(pcm_devs, int, NULL, 0444);
141 MODULE_PARM_DESC(pcm_devs, "PCM devices # (0-4) for dummy driver.");
142 module_param_array(pcm_substreams, int, NULL, 0444);
143 MODULE_PARM_DESC(pcm_substreams, "PCM substreams # (1-16) for dummy driver.");
144 //module_param_array(midi_devs, int, NULL, 0444);
145 //MODULE_PARM_DESC(midi_devs, "MIDI devices # (0-2) for dummy driver.");
147 static struct platform_device *devices[SNDRV_CARDS];
149 #define MIXER_ADDR_MASTER 0
150 #define MIXER_ADDR_LINE 1
151 #define MIXER_ADDR_MIC 2
152 #define MIXER_ADDR_SYNTH 3
153 #define MIXER_ADDR_CD 4
154 #define MIXER_ADDR_LAST 4
156 struct snd_dummy {
157 struct snd_card *card;
158 struct snd_pcm *pcm;
159 spinlock_t mixer_lock;
160 int mixer_volume[MIXER_ADDR_LAST+1][2];
161 int capture_source[MIXER_ADDR_LAST+1][2];
164 struct snd_dummy_pcm {
165 struct snd_dummy *dummy;
166 spinlock_t lock;
167 struct timer_list timer;
168 unsigned int pcm_size;
169 unsigned int pcm_count;
170 unsigned int pcm_bps; /* bytes per second */
171 unsigned int pcm_jiffie; /* bytes per one jiffie */
172 unsigned int pcm_irq_pos; /* IRQ position */
173 unsigned int pcm_buf_pos; /* position in buffer */
174 struct snd_pcm_substream *substream;
178 static inline void snd_card_dummy_pcm_timer_start(struct snd_dummy_pcm *dpcm)
180 dpcm->timer.expires = 1 + jiffies;
181 add_timer(&dpcm->timer);
184 static inline void snd_card_dummy_pcm_timer_stop(struct snd_dummy_pcm *dpcm)
186 del_timer(&dpcm->timer);
189 static int snd_card_dummy_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
191 struct snd_pcm_runtime *runtime = substream->runtime;
192 struct snd_dummy_pcm *dpcm = runtime->private_data;
193 int err = 0;
195 spin_lock(&dpcm->lock);
196 switch (cmd) {
197 case SNDRV_PCM_TRIGGER_START:
198 case SNDRV_PCM_TRIGGER_RESUME:
199 snd_card_dummy_pcm_timer_start(dpcm);
200 break;
201 case SNDRV_PCM_TRIGGER_STOP:
202 case SNDRV_PCM_TRIGGER_SUSPEND:
203 snd_card_dummy_pcm_timer_stop(dpcm);
204 break;
205 default:
206 err = -EINVAL;
207 break;
209 spin_unlock(&dpcm->lock);
210 return 0;
213 static int snd_card_dummy_pcm_prepare(struct snd_pcm_substream *substream)
215 struct snd_pcm_runtime *runtime = substream->runtime;
216 struct snd_dummy_pcm *dpcm = runtime->private_data;
217 unsigned int bps;
219 bps = runtime->rate * runtime->channels;
220 bps *= snd_pcm_format_width(runtime->format);
221 bps /= 8;
222 if (bps <= 0)
223 return -EINVAL;
224 dpcm->pcm_bps = bps;
225 dpcm->pcm_jiffie = bps / HZ;
226 dpcm->pcm_size = snd_pcm_lib_buffer_bytes(substream);
227 dpcm->pcm_count = snd_pcm_lib_period_bytes(substream);
228 dpcm->pcm_irq_pos = 0;
229 dpcm->pcm_buf_pos = 0;
230 return 0;
233 static void snd_card_dummy_pcm_timer_function(unsigned long data)
235 struct snd_dummy_pcm *dpcm = (struct snd_dummy_pcm *)data;
236 unsigned long flags;
238 spin_lock_irqsave(&dpcm->lock, flags);
239 dpcm->timer.expires = 1 + jiffies;
240 add_timer(&dpcm->timer);
241 dpcm->pcm_irq_pos += dpcm->pcm_jiffie;
242 dpcm->pcm_buf_pos += dpcm->pcm_jiffie;
243 dpcm->pcm_buf_pos %= dpcm->pcm_size;
244 if (dpcm->pcm_irq_pos >= dpcm->pcm_count) {
245 dpcm->pcm_irq_pos %= dpcm->pcm_count;
246 spin_unlock_irqrestore(&dpcm->lock, flags);
247 snd_pcm_period_elapsed(dpcm->substream);
248 } else
249 spin_unlock_irqrestore(&dpcm->lock, flags);
252 static snd_pcm_uframes_t snd_card_dummy_pcm_pointer(struct snd_pcm_substream *substream)
254 struct snd_pcm_runtime *runtime = substream->runtime;
255 struct snd_dummy_pcm *dpcm = runtime->private_data;
257 return bytes_to_frames(runtime, dpcm->pcm_buf_pos);
260 static struct snd_pcm_hardware snd_card_dummy_playback =
262 .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
263 SNDRV_PCM_INFO_RESUME | SNDRV_PCM_INFO_MMAP_VALID),
264 .formats = USE_FORMATS,
265 .rates = USE_RATE,
266 .rate_min = USE_RATE_MIN,
267 .rate_max = USE_RATE_MAX,
268 .channels_min = USE_CHANNELS_MIN,
269 .channels_max = USE_CHANNELS_MAX,
270 .buffer_bytes_max = MAX_BUFFER_SIZE,
271 .period_bytes_min = 64,
272 .period_bytes_max = MAX_BUFFER_SIZE,
273 .periods_min = USE_PERIODS_MIN,
274 .periods_max = USE_PERIODS_MAX,
275 .fifo_size = 0,
278 static struct snd_pcm_hardware snd_card_dummy_capture =
280 .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
281 SNDRV_PCM_INFO_RESUME | SNDRV_PCM_INFO_MMAP_VALID),
282 .formats = USE_FORMATS,
283 .rates = USE_RATE,
284 .rate_min = USE_RATE_MIN,
285 .rate_max = USE_RATE_MAX,
286 .channels_min = USE_CHANNELS_MIN,
287 .channels_max = USE_CHANNELS_MAX,
288 .buffer_bytes_max = MAX_BUFFER_SIZE,
289 .period_bytes_min = 64,
290 .period_bytes_max = MAX_BUFFER_SIZE,
291 .periods_min = USE_PERIODS_MIN,
292 .periods_max = USE_PERIODS_MAX,
293 .fifo_size = 0,
296 static void snd_card_dummy_runtime_free(struct snd_pcm_runtime *runtime)
298 kfree(runtime->private_data);
301 static int snd_card_dummy_hw_params(struct snd_pcm_substream *substream,
302 struct snd_pcm_hw_params *hw_params)
304 return snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params));
307 static int snd_card_dummy_hw_free(struct snd_pcm_substream *substream)
309 return snd_pcm_lib_free_pages(substream);
312 static struct snd_dummy_pcm *new_pcm_stream(struct snd_pcm_substream *substream)
314 struct snd_dummy_pcm *dpcm;
316 dpcm = kzalloc(sizeof(*dpcm), GFP_KERNEL);
317 if (! dpcm)
318 return dpcm;
319 init_timer(&dpcm->timer);
320 dpcm->timer.data = (unsigned long) dpcm;
321 dpcm->timer.function = snd_card_dummy_pcm_timer_function;
322 spin_lock_init(&dpcm->lock);
323 dpcm->substream = substream;
324 return dpcm;
327 static int snd_card_dummy_playback_open(struct snd_pcm_substream *substream)
329 struct snd_pcm_runtime *runtime = substream->runtime;
330 struct snd_dummy_pcm *dpcm;
331 int err;
333 if ((dpcm = new_pcm_stream(substream)) == NULL)
334 return -ENOMEM;
335 runtime->private_data = dpcm;
336 runtime->private_free = snd_card_dummy_runtime_free;
337 runtime->hw = snd_card_dummy_playback;
338 if (substream->pcm->device & 1) {
339 runtime->hw.info &= ~SNDRV_PCM_INFO_INTERLEAVED;
340 runtime->hw.info |= SNDRV_PCM_INFO_NONINTERLEAVED;
342 if (substream->pcm->device & 2)
343 runtime->hw.info &= ~(SNDRV_PCM_INFO_MMAP|SNDRV_PCM_INFO_MMAP_VALID);
344 if ((err = add_playback_constraints(runtime)) < 0) {
345 kfree(dpcm);
346 return err;
349 return 0;
352 static int snd_card_dummy_capture_open(struct snd_pcm_substream *substream)
354 struct snd_pcm_runtime *runtime = substream->runtime;
355 struct snd_dummy_pcm *dpcm;
356 int err;
358 if ((dpcm = new_pcm_stream(substream)) == NULL)
359 return -ENOMEM;
360 runtime->private_data = dpcm;
361 runtime->private_free = snd_card_dummy_runtime_free;
362 runtime->hw = snd_card_dummy_capture;
363 if (substream->pcm->device == 1) {
364 runtime->hw.info &= ~SNDRV_PCM_INFO_INTERLEAVED;
365 runtime->hw.info |= SNDRV_PCM_INFO_NONINTERLEAVED;
367 if (substream->pcm->device & 2)
368 runtime->hw.info &= ~(SNDRV_PCM_INFO_MMAP|SNDRV_PCM_INFO_MMAP_VALID);
369 if ((err = add_capture_constraints(runtime)) < 0) {
370 kfree(dpcm);
371 return err;
374 return 0;
377 static int snd_card_dummy_playback_close(struct snd_pcm_substream *substream)
379 return 0;
382 static int snd_card_dummy_capture_close(struct snd_pcm_substream *substream)
384 return 0;
387 static struct snd_pcm_ops snd_card_dummy_playback_ops = {
388 .open = snd_card_dummy_playback_open,
389 .close = snd_card_dummy_playback_close,
390 .ioctl = snd_pcm_lib_ioctl,
391 .hw_params = snd_card_dummy_hw_params,
392 .hw_free = snd_card_dummy_hw_free,
393 .prepare = snd_card_dummy_pcm_prepare,
394 .trigger = snd_card_dummy_pcm_trigger,
395 .pointer = snd_card_dummy_pcm_pointer,
398 static struct snd_pcm_ops snd_card_dummy_capture_ops = {
399 .open = snd_card_dummy_capture_open,
400 .close = snd_card_dummy_capture_close,
401 .ioctl = snd_pcm_lib_ioctl,
402 .hw_params = snd_card_dummy_hw_params,
403 .hw_free = snd_card_dummy_hw_free,
404 .prepare = snd_card_dummy_pcm_prepare,
405 .trigger = snd_card_dummy_pcm_trigger,
406 .pointer = snd_card_dummy_pcm_pointer,
409 static int __init snd_card_dummy_pcm(struct snd_dummy *dummy, int device, int substreams)
411 struct snd_pcm *pcm;
412 int err;
414 if ((err = snd_pcm_new(dummy->card, "Dummy PCM", device,
415 substreams, substreams, &pcm)) < 0)
416 return err;
417 dummy->pcm = pcm;
418 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_card_dummy_playback_ops);
419 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_card_dummy_capture_ops);
420 pcm->private_data = dummy;
421 pcm->info_flags = 0;
422 strcpy(pcm->name, "Dummy PCM");
423 snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_CONTINUOUS,
424 snd_dma_continuous_data(GFP_KERNEL),
425 0, 64*1024);
426 return 0;
429 #define DUMMY_VOLUME(xname, xindex, addr) \
430 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
431 .info = snd_dummy_volume_info, \
432 .get = snd_dummy_volume_get, .put = snd_dummy_volume_put, \
433 .private_value = addr }
435 static int snd_dummy_volume_info(struct snd_kcontrol *kcontrol,
436 struct snd_ctl_elem_info *uinfo)
438 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
439 uinfo->count = 2;
440 uinfo->value.integer.min = -50;
441 uinfo->value.integer.max = 100;
442 return 0;
445 static int snd_dummy_volume_get(struct snd_kcontrol *kcontrol,
446 struct snd_ctl_elem_value *ucontrol)
448 struct snd_dummy *dummy = snd_kcontrol_chip(kcontrol);
449 int addr = kcontrol->private_value;
451 spin_lock_irq(&dummy->mixer_lock);
452 ucontrol->value.integer.value[0] = dummy->mixer_volume[addr][0];
453 ucontrol->value.integer.value[1] = dummy->mixer_volume[addr][1];
454 spin_unlock_irq(&dummy->mixer_lock);
455 return 0;
458 static int snd_dummy_volume_put(struct snd_kcontrol *kcontrol,
459 struct snd_ctl_elem_value *ucontrol)
461 struct snd_dummy *dummy = snd_kcontrol_chip(kcontrol);
462 int change, addr = kcontrol->private_value;
463 int left, right;
465 left = ucontrol->value.integer.value[0];
466 if (left < -50)
467 left = -50;
468 if (left > 100)
469 left = 100;
470 right = ucontrol->value.integer.value[1];
471 if (right < -50)
472 right = -50;
473 if (right > 100)
474 right = 100;
475 spin_lock_irq(&dummy->mixer_lock);
476 change = dummy->mixer_volume[addr][0] != left ||
477 dummy->mixer_volume[addr][1] != right;
478 dummy->mixer_volume[addr][0] = left;
479 dummy->mixer_volume[addr][1] = right;
480 spin_unlock_irq(&dummy->mixer_lock);
481 return change;
484 #define DUMMY_CAPSRC(xname, xindex, addr) \
485 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
486 .info = snd_dummy_capsrc_info, \
487 .get = snd_dummy_capsrc_get, .put = snd_dummy_capsrc_put, \
488 .private_value = addr }
490 static int snd_dummy_capsrc_info(struct snd_kcontrol *kcontrol,
491 struct snd_ctl_elem_info *uinfo)
493 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
494 uinfo->count = 2;
495 uinfo->value.integer.min = 0;
496 uinfo->value.integer.max = 1;
497 return 0;
500 static int snd_dummy_capsrc_get(struct snd_kcontrol *kcontrol,
501 struct snd_ctl_elem_value *ucontrol)
503 struct snd_dummy *dummy = snd_kcontrol_chip(kcontrol);
504 int addr = kcontrol->private_value;
506 spin_lock_irq(&dummy->mixer_lock);
507 ucontrol->value.integer.value[0] = dummy->capture_source[addr][0];
508 ucontrol->value.integer.value[1] = dummy->capture_source[addr][1];
509 spin_unlock_irq(&dummy->mixer_lock);
510 return 0;
513 static int snd_dummy_capsrc_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
515 struct snd_dummy *dummy = snd_kcontrol_chip(kcontrol);
516 int change, addr = kcontrol->private_value;
517 int left, right;
519 left = ucontrol->value.integer.value[0] & 1;
520 right = ucontrol->value.integer.value[1] & 1;
521 spin_lock_irq(&dummy->mixer_lock);
522 change = dummy->capture_source[addr][0] != left &&
523 dummy->capture_source[addr][1] != right;
524 dummy->capture_source[addr][0] = left;
525 dummy->capture_source[addr][1] = right;
526 spin_unlock_irq(&dummy->mixer_lock);
527 return change;
530 static struct snd_kcontrol_new snd_dummy_controls[] = {
531 DUMMY_VOLUME("Master Volume", 0, MIXER_ADDR_MASTER),
532 DUMMY_CAPSRC("Master Capture Switch", 0, MIXER_ADDR_MASTER),
533 DUMMY_VOLUME("Synth Volume", 0, MIXER_ADDR_SYNTH),
534 DUMMY_CAPSRC("Synth Capture Switch", 0, MIXER_ADDR_MASTER),
535 DUMMY_VOLUME("Line Volume", 0, MIXER_ADDR_LINE),
536 DUMMY_CAPSRC("Line Capture Switch", 0, MIXER_ADDR_MASTER),
537 DUMMY_VOLUME("Mic Volume", 0, MIXER_ADDR_MIC),
538 DUMMY_CAPSRC("Mic Capture Switch", 0, MIXER_ADDR_MASTER),
539 DUMMY_VOLUME("CD Volume", 0, MIXER_ADDR_CD),
540 DUMMY_CAPSRC("CD Capture Switch", 0, MIXER_ADDR_MASTER)
543 static int __init snd_card_dummy_new_mixer(struct snd_dummy *dummy)
545 struct snd_card *card = dummy->card;
546 unsigned int idx;
547 int err;
549 snd_assert(dummy != NULL, return -EINVAL);
550 spin_lock_init(&dummy->mixer_lock);
551 strcpy(card->mixername, "Dummy Mixer");
553 for (idx = 0; idx < ARRAY_SIZE(snd_dummy_controls); idx++) {
554 if ((err = snd_ctl_add(card, snd_ctl_new1(&snd_dummy_controls[idx], dummy))) < 0)
555 return err;
557 return 0;
560 static int __init snd_dummy_probe(struct platform_device *devptr)
562 struct snd_card *card;
563 struct snd_dummy *dummy;
564 int idx, err;
565 int dev = devptr->id;
567 card = snd_card_new(index[dev], id[dev], THIS_MODULE,
568 sizeof(struct snd_dummy));
569 if (card == NULL)
570 return -ENOMEM;
571 dummy = card->private_data;
572 dummy->card = card;
573 for (idx = 0; idx < MAX_PCM_DEVICES && idx < pcm_devs[dev]; idx++) {
574 if (pcm_substreams[dev] < 1)
575 pcm_substreams[dev] = 1;
576 if (pcm_substreams[dev] > MAX_PCM_SUBSTREAMS)
577 pcm_substreams[dev] = MAX_PCM_SUBSTREAMS;
578 if ((err = snd_card_dummy_pcm(dummy, idx, pcm_substreams[dev])) < 0)
579 goto __nodev;
581 if ((err = snd_card_dummy_new_mixer(dummy)) < 0)
582 goto __nodev;
583 strcpy(card->driver, "Dummy");
584 strcpy(card->shortname, "Dummy");
585 sprintf(card->longname, "Dummy %i", dev + 1);
587 snd_card_set_dev(card, &devptr->dev);
589 if ((err = snd_card_register(card)) == 0) {
590 platform_set_drvdata(devptr, card);
591 return 0;
593 __nodev:
594 snd_card_free(card);
595 return err;
598 static int snd_dummy_remove(struct platform_device *devptr)
600 snd_card_free(platform_get_drvdata(devptr));
601 platform_set_drvdata(devptr, NULL);
602 return 0;
605 #ifdef CONFIG_PM
606 static int snd_dummy_suspend(struct platform_device *pdev, pm_message_t state)
608 struct snd_card *card = platform_get_drvdata(pdev);
609 struct snd_dummy *dummy = card->private_data;
611 snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
612 snd_pcm_suspend_all(dummy->pcm);
613 return 0;
616 static int snd_dummy_resume(struct platform_device *pdev)
618 struct snd_card *card = platform_get_drvdata(pdev);
620 snd_power_change_state(card, SNDRV_CTL_POWER_D0);
621 return 0;
623 #endif
625 #define SND_DUMMY_DRIVER "snd_dummy"
627 static struct platform_driver snd_dummy_driver = {
628 .probe = snd_dummy_probe,
629 .remove = snd_dummy_remove,
630 #ifdef CONFIG_PM
631 .suspend = snd_dummy_suspend,
632 .resume = snd_dummy_resume,
633 #endif
634 .driver = {
635 .name = SND_DUMMY_DRIVER
639 static void __init_or_module snd_dummy_unregister_all(void)
641 int i;
643 for (i = 0; i < ARRAY_SIZE(devices); ++i)
644 platform_device_unregister(devices[i]);
645 platform_driver_unregister(&snd_dummy_driver);
648 static int __init alsa_card_dummy_init(void)
650 int i, cards, err;
652 if ((err = platform_driver_register(&snd_dummy_driver)) < 0)
653 return err;
655 cards = 0;
656 for (i = 0; i < SNDRV_CARDS && enable[i]; i++) {
657 struct platform_device *device;
658 device = platform_device_register_simple(SND_DUMMY_DRIVER,
659 i, NULL, 0);
660 if (IS_ERR(device)) {
661 err = PTR_ERR(device);
662 goto errout;
664 devices[i] = device;
665 cards++;
667 if (!cards) {
668 #ifdef MODULE
669 printk(KERN_ERR "Dummy soundcard not found or device busy\n");
670 #endif
671 err = -ENODEV;
672 goto errout;
674 return 0;
676 errout:
677 snd_dummy_unregister_all();
678 return err;
681 static void __exit alsa_card_dummy_exit(void)
683 snd_dummy_unregister_all();
686 module_init(alsa_card_dummy_init)
687 module_exit(alsa_card_dummy_exit)