96d207051628390884914933477f95d707128a68
[linux-3.10.git] / sound / drivers / dummy.c
1 /*
2  *  Dummy soundcard
3  *  Copyright (c) by Jaroslav Kysela <perex@suse.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 <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>
35
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}}");
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)
47 static int emu10k1_playback_constraints(struct snd_pcm_runtime *runtime)
48 {
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;
55 }
56 #define add_playback_constraints emu10k1_playback_constraints
57 #endif
58
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
67
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
76
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
85
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
94
95
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
126
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};
133
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.");
146
147 static struct platform_device *devices[SNDRV_CARDS];
148
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
155
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];
162 };
163
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;
175 };
176
177
178 static inline void snd_card_dummy_pcm_timer_start(struct snd_dummy_pcm *dpcm)
179 {
180         dpcm->timer.expires = 1 + jiffies;
181         add_timer(&dpcm->timer);
182 }
183
184 static inline void snd_card_dummy_pcm_timer_stop(struct snd_dummy_pcm *dpcm)
185 {
186         del_timer(&dpcm->timer);
187 }
188
189 static int snd_card_dummy_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
190 {
191         struct snd_pcm_runtime *runtime = substream->runtime;
192         struct snd_dummy_pcm *dpcm = runtime->private_data;
193         int err = 0;
194
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;
208         }
209         spin_unlock(&dpcm->lock);
210         return 0;
211 }
212
213 static int snd_card_dummy_pcm_prepare(struct snd_pcm_substream *substream)
214 {
215         struct snd_pcm_runtime *runtime = substream->runtime;
216         struct snd_dummy_pcm *dpcm = runtime->private_data;
217         unsigned int bps;
218
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;
231 }
232
233 static void snd_card_dummy_pcm_timer_function(unsigned long data)
234 {
235         struct snd_dummy_pcm *dpcm = (struct snd_dummy_pcm *)data;
236         unsigned long flags;
237         
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);
250 }
251
252 static snd_pcm_uframes_t snd_card_dummy_pcm_pointer(struct snd_pcm_substream *substream)
253 {
254         struct snd_pcm_runtime *runtime = substream->runtime;
255         struct snd_dummy_pcm *dpcm = runtime->private_data;
256
257         return bytes_to_frames(runtime, dpcm->pcm_buf_pos);
258 }
259
260 static struct snd_pcm_hardware snd_card_dummy_playback =
261 {
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,
276 };
277
278 static struct snd_pcm_hardware snd_card_dummy_capture =
279 {
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,
294 };
295
296 static void snd_card_dummy_runtime_free(struct snd_pcm_runtime *runtime)
297 {
298         kfree(runtime->private_data);
299 }
300
301 static int snd_card_dummy_hw_params(struct snd_pcm_substream *substream,
302                                     struct snd_pcm_hw_params *hw_params)
303 {
304         return snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params));
305 }
306
307 static int snd_card_dummy_hw_free(struct snd_pcm_substream *substream)
308 {
309         return snd_pcm_lib_free_pages(substream);
310 }
311
312 static struct snd_dummy_pcm *new_pcm_stream(struct snd_pcm_substream *substream)
313 {
314         struct snd_dummy_pcm *dpcm;
315
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;
325 }
326
327 static int snd_card_dummy_playback_open(struct snd_pcm_substream *substream)
328 {
329         struct snd_pcm_runtime *runtime = substream->runtime;
330         struct snd_dummy_pcm *dpcm;
331         int err;
332
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;
341         }
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;
347         }
348
349         return 0;
350 }
351
352 static int snd_card_dummy_capture_open(struct snd_pcm_substream *substream)
353 {
354         struct snd_pcm_runtime *runtime = substream->runtime;
355         struct snd_dummy_pcm *dpcm;
356         int err;
357
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;
366         }
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;
372         }
373
374         return 0;
375 }
376
377 static int snd_card_dummy_playback_close(struct snd_pcm_substream *substream)
378 {
379         return 0;
380 }
381
382 static int snd_card_dummy_capture_close(struct snd_pcm_substream *substream)
383 {
384         return 0;
385 }
386
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,
396 };
397
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,
407 };
408
409 static int __init snd_card_dummy_pcm(struct snd_dummy *dummy, int device, int substreams)
410 {
411         struct snd_pcm *pcm;
412         int err;
413
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;
427 }
428
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 }
434
435 static int snd_dummy_volume_info(struct snd_kcontrol *kcontrol,
436                                  struct snd_ctl_elem_info *uinfo)
437 {
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;
443 }
444  
445 static int snd_dummy_volume_get(struct snd_kcontrol *kcontrol,
446                                 struct snd_ctl_elem_value *ucontrol)
447 {
448         struct snd_dummy *dummy = snd_kcontrol_chip(kcontrol);
449         int addr = kcontrol->private_value;
450
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;
456 }
457
458 static int snd_dummy_volume_put(struct snd_kcontrol *kcontrol,
459                                 struct snd_ctl_elem_value *ucontrol)
460 {
461         struct snd_dummy *dummy = snd_kcontrol_chip(kcontrol);
462         int change, addr = kcontrol->private_value;
463         int left, right;
464
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;
482 }
483
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 }
489
490 static int snd_dummy_capsrc_info(struct snd_kcontrol *kcontrol,
491                                  struct snd_ctl_elem_info *uinfo)
492 {
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;
498 }
499  
500 static int snd_dummy_capsrc_get(struct snd_kcontrol *kcontrol,
501                                 struct snd_ctl_elem_value *ucontrol)
502 {
503         struct snd_dummy *dummy = snd_kcontrol_chip(kcontrol);
504         int addr = kcontrol->private_value;
505
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;
511 }
512
513 static int snd_dummy_capsrc_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
514 {
515         struct snd_dummy *dummy = snd_kcontrol_chip(kcontrol);
516         int change, addr = kcontrol->private_value;
517         int left, right;
518
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;
528 }
529
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)
541 };
542
543 static int __init snd_card_dummy_new_mixer(struct snd_dummy *dummy)
544 {
545         struct snd_card *card = dummy->card;
546         unsigned int idx;
547         int err;
548
549         snd_assert(dummy != NULL, return -EINVAL);
550         spin_lock_init(&dummy->mixer_lock);
551         strcpy(card->mixername, "Dummy Mixer");
552
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;
556         }
557         return 0;
558 }
559
560 static int __init snd_dummy_probe(struct platform_device *devptr)
561 {
562         struct snd_card *card;
563         struct snd_dummy *dummy;
564         int idx, err;
565         int dev = devptr->id;
566
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;
580         }
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);
586
587         snd_card_set_dev(card, &devptr->dev);
588
589         if ((err = snd_card_register(card)) == 0) {
590                 platform_set_drvdata(devptr, card);
591                 return 0;
592         }
593       __nodev:
594         snd_card_free(card);
595         return err;
596 }
597
598 static int snd_dummy_remove(struct platform_device *devptr)
599 {
600         snd_card_free(platform_get_drvdata(devptr));
601         platform_set_drvdata(devptr, NULL);
602         return 0;
603 }
604
605 #ifdef CONFIG_PM
606 static int snd_dummy_suspend(struct platform_device *pdev, pm_message_t state)
607 {
608         struct snd_card *card = platform_get_drvdata(pdev);
609         struct snd_dummy *dummy = card->private_data;
610
611         snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
612         snd_pcm_suspend_all(dummy->pcm);
613         return 0;
614 }
615         
616 static int snd_dummy_resume(struct platform_device *pdev)
617 {
618         struct snd_card *card = platform_get_drvdata(pdev);
619
620         snd_power_change_state(card, SNDRV_CTL_POWER_D0);
621         return 0;
622 }
623 #endif
624
625 #define SND_DUMMY_DRIVER        "snd_dummy"
626
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
636         },
637 };
638
639 static void __init_or_module snd_dummy_unregister_all(void)
640 {
641         int i;
642
643         for (i = 0; i < ARRAY_SIZE(devices); ++i)
644                 platform_device_unregister(devices[i]);
645         platform_driver_unregister(&snd_dummy_driver);
646 }
647
648 static int __init alsa_card_dummy_init(void)
649 {
650         int i, cards, err;
651
652         if ((err = platform_driver_register(&snd_dummy_driver)) < 0)
653                 return err;
654
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;
663                 }
664                 devices[i] = device;
665                 cards++;
666         }
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;
673         }
674         return 0;
675
676  errout:
677         snd_dummy_unregister_all();
678         return err;
679 }
680
681 static void __exit alsa_card_dummy_exit(void)
682 {
683         snd_dummy_unregister_all();
684 }
685
686 module_init(alsa_card_dummy_init)
687 module_exit(alsa_card_dummy_exit)