[ALSA] Add snd_card_set_generic_dev() call
[linux-2.6.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/jiffies.h>
24 #include <linux/slab.h>
25 #include <linux/time.h>
26 #include <linux/wait.h>
27 #include <linux/moduleparam.h>
28 #include <sound/core.h>
29 #include <sound/control.h>
30 #include <sound/pcm.h>
31 #include <sound/rawmidi.h>
32 #include <sound/initval.h>
33
34 MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>");
35 MODULE_DESCRIPTION("Dummy soundcard (/dev/null)");
36 MODULE_LICENSE("GPL");
37 MODULE_SUPPORTED_DEVICE("{{ALSA,Dummy soundcard}}");
38
39 #define MAX_PCM_DEVICES         4
40 #define MAX_PCM_SUBSTREAMS      16
41 #define MAX_MIDI_DEVICES        2
42
43 #if 0 /* emu10k1 emulation */
44 #define MAX_BUFFER_SIZE         (128 * 1024)
45 static int emu10k1_playback_constraints(snd_pcm_runtime_t *runtime)
46 {
47         int err;
48         if ((err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
49                 return err;
50         if ((err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 256, UINT_MAX)) < 0)
51                 return err;
52         return 0;
53 }
54 #define add_playback_constraints emu10k1_playback_constraints
55 #endif
56
57 #if 0 /* RME9652 emulation */
58 #define MAX_BUFFER_SIZE         (26 * 64 * 1024)
59 #define USE_FORMATS             SNDRV_PCM_FMTBIT_S32_LE
60 #define USE_CHANNELS_MIN        26
61 #define USE_CHANNELS_MAX        26
62 #define USE_PERIODS_MIN         2
63 #define USE_PERIODS_MAX         2
64 #endif
65
66 #if 0 /* ICE1712 emulation */
67 #define MAX_BUFFER_SIZE         (256 * 1024)
68 #define USE_FORMATS             SNDRV_PCM_FMTBIT_S32_LE
69 #define USE_CHANNELS_MIN        10
70 #define USE_CHANNELS_MAX        10
71 #define USE_PERIODS_MIN         1
72 #define USE_PERIODS_MAX         1024
73 #endif
74
75 #if 0 /* UDA1341 emulation */
76 #define MAX_BUFFER_SIZE         (16380)
77 #define USE_FORMATS             SNDRV_PCM_FMTBIT_S16_LE
78 #define USE_CHANNELS_MIN        2
79 #define USE_CHANNELS_MAX        2
80 #define USE_PERIODS_MIN         2
81 #define USE_PERIODS_MAX         255
82 #endif
83
84 #if 0 /* simple AC97 bridge (intel8x0) with 48kHz AC97 only codec */
85 #define USE_FORMATS             SNDRV_PCM_FMTBIT_S16_LE
86 #define USE_CHANNELS_MIN        2
87 #define USE_CHANNELS_MAX        2
88 #define USE_RATE                SNDRV_PCM_RATE_48000
89 #define USE_RATE_MIN            48000
90 #define USE_RATE_MAX            48000
91 #endif
92
93
94 /* defaults */
95 #ifndef MAX_BUFFER_SIZE
96 #define MAX_BUFFER_SIZE         (64*1024)
97 #endif
98 #ifndef USE_FORMATS
99 #define USE_FORMATS             (SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE)
100 #endif
101 #ifndef USE_RATE
102 #define USE_RATE                SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_48000
103 #define USE_RATE_MIN            5500
104 #define USE_RATE_MAX            48000
105 #endif
106 #ifndef USE_CHANNELS_MIN
107 #define USE_CHANNELS_MIN        1
108 #endif
109 #ifndef USE_CHANNELS_MAX
110 #define USE_CHANNELS_MAX        2
111 #endif
112 #ifndef USE_PERIODS_MIN
113 #define USE_PERIODS_MIN         1
114 #endif
115 #ifndef USE_PERIODS_MAX
116 #define USE_PERIODS_MAX         1024
117 #endif
118 #ifndef add_playback_constraints
119 #define add_playback_constraints(x) 0
120 #endif
121 #ifndef add_capture_constraints
122 #define add_capture_constraints(x) 0
123 #endif
124
125 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;      /* Index 0-MAX */
126 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;       /* ID for this card */
127 static int enable[SNDRV_CARDS] = {1, [1 ... (SNDRV_CARDS - 1)] = 0};
128 static int pcm_devs[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 1};
129 static int pcm_substreams[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 8};
130 //static int midi_devs[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 2};
131
132 module_param_array(index, int, NULL, 0444);
133 MODULE_PARM_DESC(index, "Index value for dummy soundcard.");
134 module_param_array(id, charp, NULL, 0444);
135 MODULE_PARM_DESC(id, "ID string for dummy soundcard.");
136 module_param_array(enable, bool, NULL, 0444);
137 MODULE_PARM_DESC(enable, "Enable this dummy soundcard.");
138 module_param_array(pcm_devs, int, NULL, 0444);
139 MODULE_PARM_DESC(pcm_devs, "PCM devices # (0-4) for dummy driver.");
140 module_param_array(pcm_substreams, int, NULL, 0444);
141 MODULE_PARM_DESC(pcm_substreams, "PCM substreams # (1-16) for dummy driver.");
142 //module_param_array(midi_devs, int, NULL, 0444);
143 //MODULE_PARM_DESC(midi_devs, "MIDI devices # (0-2) for dummy driver.");
144
145 #define MIXER_ADDR_MASTER       0
146 #define MIXER_ADDR_LINE         1
147 #define MIXER_ADDR_MIC          2
148 #define MIXER_ADDR_SYNTH        3
149 #define MIXER_ADDR_CD           4
150 #define MIXER_ADDR_LAST         4
151
152 typedef struct snd_card_dummy {
153         snd_card_t *card;
154         spinlock_t mixer_lock;
155         int mixer_volume[MIXER_ADDR_LAST+1][2];
156         int capture_source[MIXER_ADDR_LAST+1][2];
157 } snd_card_dummy_t;
158
159 typedef struct snd_card_dummy_pcm {
160         snd_card_dummy_t *dummy;
161         spinlock_t lock;
162         struct timer_list timer;
163         unsigned int pcm_size;
164         unsigned int pcm_count;
165         unsigned int pcm_bps;           /* bytes per second */
166         unsigned int pcm_jiffie;        /* bytes per one jiffie */
167         unsigned int pcm_irq_pos;       /* IRQ position */
168         unsigned int pcm_buf_pos;       /* position in buffer */
169         snd_pcm_substream_t *substream;
170 } snd_card_dummy_pcm_t;
171
172 static snd_card_t *snd_dummy_cards[SNDRV_CARDS] = SNDRV_DEFAULT_PTR;
173
174
175 static void snd_card_dummy_pcm_timer_start(snd_pcm_substream_t * substream)
176 {
177         snd_pcm_runtime_t *runtime = substream->runtime;
178         snd_card_dummy_pcm_t *dpcm = runtime->private_data;
179
180         dpcm->timer.expires = 1 + jiffies;
181         add_timer(&dpcm->timer);
182 }
183
184 static void snd_card_dummy_pcm_timer_stop(snd_pcm_substream_t * substream)
185 {
186         snd_pcm_runtime_t *runtime = substream->runtime;
187         snd_card_dummy_pcm_t *dpcm = runtime->private_data;
188
189         del_timer(&dpcm->timer);
190 }
191
192 static int snd_card_dummy_playback_trigger(snd_pcm_substream_t * substream,
193                                            int cmd)
194 {
195         if (cmd == SNDRV_PCM_TRIGGER_START) {
196                 snd_card_dummy_pcm_timer_start(substream);
197         } else if (cmd == SNDRV_PCM_TRIGGER_STOP) {
198                 snd_card_dummy_pcm_timer_stop(substream);
199         } else {
200                 return -EINVAL;
201         }
202         return 0;
203 }
204
205 static int snd_card_dummy_capture_trigger(snd_pcm_substream_t * substream,
206                                           int cmd)
207 {
208         if (cmd == SNDRV_PCM_TRIGGER_START) {
209                 snd_card_dummy_pcm_timer_start(substream);
210         } else if (cmd == SNDRV_PCM_TRIGGER_STOP) {
211                 snd_card_dummy_pcm_timer_stop(substream);
212         } else {
213                 return -EINVAL;
214         }
215         return 0;
216 }
217
218 static int snd_card_dummy_pcm_prepare(snd_pcm_substream_t * substream)
219 {
220         snd_pcm_runtime_t *runtime = substream->runtime;
221         snd_card_dummy_pcm_t *dpcm = runtime->private_data;
222         unsigned int bps;
223
224         bps = runtime->rate * runtime->channels;
225         bps *= snd_pcm_format_width(runtime->format);
226         bps /= 8;
227         if (bps <= 0)
228                 return -EINVAL;
229         dpcm->pcm_bps = bps;
230         dpcm->pcm_jiffie = bps / HZ;
231         dpcm->pcm_size = snd_pcm_lib_buffer_bytes(substream);
232         dpcm->pcm_count = snd_pcm_lib_period_bytes(substream);
233         dpcm->pcm_irq_pos = 0;
234         dpcm->pcm_buf_pos = 0;
235         return 0;
236 }
237
238 static int snd_card_dummy_playback_prepare(snd_pcm_substream_t * substream)
239 {
240         return snd_card_dummy_pcm_prepare(substream);
241 }
242
243 static int snd_card_dummy_capture_prepare(snd_pcm_substream_t * substream)
244 {
245         return snd_card_dummy_pcm_prepare(substream);
246 }
247
248 static void snd_card_dummy_pcm_timer_function(unsigned long data)
249 {
250         snd_card_dummy_pcm_t *dpcm = (snd_card_dummy_pcm_t *)data;
251         
252         dpcm->timer.expires = 1 + jiffies;
253         add_timer(&dpcm->timer);
254         spin_lock_irq(&dpcm->lock);
255         dpcm->pcm_irq_pos += dpcm->pcm_jiffie;
256         dpcm->pcm_buf_pos += dpcm->pcm_jiffie;
257         dpcm->pcm_buf_pos %= dpcm->pcm_size;
258         if (dpcm->pcm_irq_pos >= dpcm->pcm_count) {
259                 dpcm->pcm_irq_pos %= dpcm->pcm_count;
260                 snd_pcm_period_elapsed(dpcm->substream);
261         }
262         spin_unlock_irq(&dpcm->lock);   
263 }
264
265 static snd_pcm_uframes_t snd_card_dummy_playback_pointer(snd_pcm_substream_t * substream)
266 {
267         snd_pcm_runtime_t *runtime = substream->runtime;
268         snd_card_dummy_pcm_t *dpcm = runtime->private_data;
269
270         return bytes_to_frames(runtime, dpcm->pcm_buf_pos);
271 }
272
273 static snd_pcm_uframes_t snd_card_dummy_capture_pointer(snd_pcm_substream_t * substream)
274 {
275         snd_pcm_runtime_t *runtime = substream->runtime;
276         snd_card_dummy_pcm_t *dpcm = runtime->private_data;
277
278         return bytes_to_frames(runtime, dpcm->pcm_buf_pos);
279 }
280
281 static snd_pcm_hardware_t snd_card_dummy_playback =
282 {
283         .info =                 (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
284                                  SNDRV_PCM_INFO_MMAP_VALID),
285         .formats =              USE_FORMATS,
286         .rates =                USE_RATE,
287         .rate_min =             USE_RATE_MIN,
288         .rate_max =             USE_RATE_MAX,
289         .channels_min =         USE_CHANNELS_MIN,
290         .channels_max =         USE_CHANNELS_MAX,
291         .buffer_bytes_max =     MAX_BUFFER_SIZE,
292         .period_bytes_min =     64,
293         .period_bytes_max =     MAX_BUFFER_SIZE,
294         .periods_min =          USE_PERIODS_MIN,
295         .periods_max =          USE_PERIODS_MAX,
296         .fifo_size =            0,
297 };
298
299 static snd_pcm_hardware_t snd_card_dummy_capture =
300 {
301         .info =                 (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
302                                  SNDRV_PCM_INFO_MMAP_VALID),
303         .formats =              USE_FORMATS,
304         .rates =                USE_RATE,
305         .rate_min =             USE_RATE_MIN,
306         .rate_max =             USE_RATE_MAX,
307         .channels_min =         USE_CHANNELS_MIN,
308         .channels_max =         USE_CHANNELS_MAX,
309         .buffer_bytes_max =     MAX_BUFFER_SIZE,
310         .period_bytes_min =     64,
311         .period_bytes_max =     MAX_BUFFER_SIZE,
312         .periods_min =          USE_PERIODS_MIN,
313         .periods_max =          USE_PERIODS_MAX,
314         .fifo_size =            0,
315 };
316
317 static void snd_card_dummy_runtime_free(snd_pcm_runtime_t *runtime)
318 {
319         snd_card_dummy_pcm_t *dpcm = runtime->private_data;
320         kfree(dpcm);
321 }
322
323 static int snd_card_dummy_hw_params(snd_pcm_substream_t * substream,
324                                     snd_pcm_hw_params_t * hw_params)
325 {
326         return snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params));
327 }
328
329 static int snd_card_dummy_hw_free(snd_pcm_substream_t * substream)
330 {
331         return snd_pcm_lib_free_pages(substream);
332 }
333
334 static int snd_card_dummy_playback_open(snd_pcm_substream_t * substream)
335 {
336         snd_pcm_runtime_t *runtime = substream->runtime;
337         snd_card_dummy_pcm_t *dpcm;
338         int err;
339
340         dpcm = kcalloc(1, sizeof(*dpcm), GFP_KERNEL);
341         if (dpcm == NULL)
342                 return -ENOMEM;
343         init_timer(&dpcm->timer);
344         dpcm->timer.data = (unsigned long) dpcm;
345         dpcm->timer.function = snd_card_dummy_pcm_timer_function;
346         spin_lock_init(&dpcm->lock);
347         dpcm->substream = substream;
348         runtime->private_data = dpcm;
349         runtime->private_free = snd_card_dummy_runtime_free;
350         runtime->hw = snd_card_dummy_playback;
351         if (substream->pcm->device & 1) {
352                 runtime->hw.info &= ~SNDRV_PCM_INFO_INTERLEAVED;
353                 runtime->hw.info |= SNDRV_PCM_INFO_NONINTERLEAVED;
354         }
355         if (substream->pcm->device & 2)
356                 runtime->hw.info &= ~(SNDRV_PCM_INFO_MMAP|SNDRV_PCM_INFO_MMAP_VALID);
357         if ((err = add_playback_constraints(runtime)) < 0) {
358                 kfree(dpcm);
359                 return err;
360         }
361
362         return 0;
363 }
364
365 static int snd_card_dummy_capture_open(snd_pcm_substream_t * substream)
366 {
367         snd_pcm_runtime_t *runtime = substream->runtime;
368         snd_card_dummy_pcm_t *dpcm;
369         int err;
370
371         dpcm = kcalloc(1, sizeof(*dpcm), GFP_KERNEL);
372         if (dpcm == NULL)
373                 return -ENOMEM;
374         init_timer(&dpcm->timer);
375         dpcm->timer.data = (unsigned long) dpcm;
376         dpcm->timer.function = snd_card_dummy_pcm_timer_function;
377         spin_lock_init(&dpcm->lock);
378         dpcm->substream = substream;
379         runtime->private_data = dpcm;
380         runtime->private_free = snd_card_dummy_runtime_free;
381         runtime->hw = snd_card_dummy_capture;
382         if (substream->pcm->device == 1) {
383                 runtime->hw.info &= ~SNDRV_PCM_INFO_INTERLEAVED;
384                 runtime->hw.info |= SNDRV_PCM_INFO_NONINTERLEAVED;
385         }
386         if (substream->pcm->device & 2)
387                 runtime->hw.info &= ~(SNDRV_PCM_INFO_MMAP|SNDRV_PCM_INFO_MMAP_VALID);
388         if ((err = add_capture_constraints(runtime)) < 0) {
389                 kfree(dpcm);
390                 return err;
391         }
392
393         return 0;
394 }
395
396 static int snd_card_dummy_playback_close(snd_pcm_substream_t * substream)
397 {
398         return 0;
399 }
400
401 static int snd_card_dummy_capture_close(snd_pcm_substream_t * substream)
402 {
403         return 0;
404 }
405
406 static snd_pcm_ops_t snd_card_dummy_playback_ops = {
407         .open =                 snd_card_dummy_playback_open,
408         .close =                snd_card_dummy_playback_close,
409         .ioctl =                snd_pcm_lib_ioctl,
410         .hw_params =            snd_card_dummy_hw_params,
411         .hw_free =              snd_card_dummy_hw_free,
412         .prepare =              snd_card_dummy_playback_prepare,
413         .trigger =              snd_card_dummy_playback_trigger,
414         .pointer =              snd_card_dummy_playback_pointer,
415 };
416
417 static snd_pcm_ops_t snd_card_dummy_capture_ops = {
418         .open =                 snd_card_dummy_capture_open,
419         .close =                snd_card_dummy_capture_close,
420         .ioctl =                snd_pcm_lib_ioctl,
421         .hw_params =            snd_card_dummy_hw_params,
422         .hw_free =              snd_card_dummy_hw_free,
423         .prepare =              snd_card_dummy_capture_prepare,
424         .trigger =              snd_card_dummy_capture_trigger,
425         .pointer =              snd_card_dummy_capture_pointer,
426 };
427
428 static int __init snd_card_dummy_pcm(snd_card_dummy_t *dummy, int device, int substreams)
429 {
430         snd_pcm_t *pcm;
431         int err;
432
433         if ((err = snd_pcm_new(dummy->card, "Dummy PCM", device, substreams, substreams, &pcm)) < 0)
434                 return err;
435         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_card_dummy_playback_ops);
436         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_card_dummy_capture_ops);
437         pcm->private_data = dummy;
438         pcm->info_flags = 0;
439         strcpy(pcm->name, "Dummy PCM");
440         snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_CONTINUOUS,
441                                               snd_dma_continuous_data(GFP_KERNEL),
442                                               0, 64*1024);
443         return 0;
444 }
445
446 #define DUMMY_VOLUME(xname, xindex, addr) \
447 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
448   .info = snd_dummy_volume_info, \
449   .get = snd_dummy_volume_get, .put = snd_dummy_volume_put, \
450   .private_value = addr }
451
452 static int snd_dummy_volume_info(snd_kcontrol_t * kcontrol, snd_ctl_elem_info_t * uinfo)
453 {
454         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
455         uinfo->count = 2;
456         uinfo->value.integer.min = -50;
457         uinfo->value.integer.max = 100;
458         return 0;
459 }
460  
461 static int snd_dummy_volume_get(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
462 {
463         snd_card_dummy_t *dummy = snd_kcontrol_chip(kcontrol);
464         unsigned long flags;
465         int addr = kcontrol->private_value;
466
467         spin_lock_irqsave(&dummy->mixer_lock, flags);
468         ucontrol->value.integer.value[0] = dummy->mixer_volume[addr][0];
469         ucontrol->value.integer.value[1] = dummy->mixer_volume[addr][1];
470         spin_unlock_irqrestore(&dummy->mixer_lock, flags);
471         return 0;
472 }
473
474 static int snd_dummy_volume_put(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
475 {
476         snd_card_dummy_t *dummy = snd_kcontrol_chip(kcontrol);
477         unsigned long flags;
478         int change, addr = kcontrol->private_value;
479         int left, right;
480
481         left = ucontrol->value.integer.value[0];
482         if (left < -50)
483                 left = -50;
484         if (left > 100)
485                 left = 100;
486         right = ucontrol->value.integer.value[1];
487         if (right < -50)
488                 right = -50;
489         if (right > 100)
490                 right = 100;
491         spin_lock_irqsave(&dummy->mixer_lock, flags);
492         change = dummy->mixer_volume[addr][0] != left ||
493                  dummy->mixer_volume[addr][1] != right;
494         dummy->mixer_volume[addr][0] = left;
495         dummy->mixer_volume[addr][1] = right;
496         spin_unlock_irqrestore(&dummy->mixer_lock, flags);
497         return change;
498 }
499
500 #define DUMMY_CAPSRC(xname, xindex, addr) \
501 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
502   .info = snd_dummy_capsrc_info, \
503   .get = snd_dummy_capsrc_get, .put = snd_dummy_capsrc_put, \
504   .private_value = addr }
505
506 static int snd_dummy_capsrc_info(snd_kcontrol_t * kcontrol, snd_ctl_elem_info_t * uinfo)
507 {
508         uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
509         uinfo->count = 2;
510         uinfo->value.integer.min = 0;
511         uinfo->value.integer.max = 1;
512         return 0;
513 }
514  
515 static int snd_dummy_capsrc_get(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
516 {
517         snd_card_dummy_t *dummy = snd_kcontrol_chip(kcontrol);
518         unsigned long flags;
519         int addr = kcontrol->private_value;
520
521         spin_lock_irqsave(&dummy->mixer_lock, flags);
522         ucontrol->value.integer.value[0] = dummy->capture_source[addr][0];
523         ucontrol->value.integer.value[1] = dummy->capture_source[addr][1];
524         spin_unlock_irqrestore(&dummy->mixer_lock, flags);
525         return 0;
526 }
527
528 static int snd_dummy_capsrc_put(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
529 {
530         snd_card_dummy_t *dummy = snd_kcontrol_chip(kcontrol);
531         unsigned long flags;
532         int change, addr = kcontrol->private_value;
533         int left, right;
534
535         left = ucontrol->value.integer.value[0] & 1;
536         right = ucontrol->value.integer.value[1] & 1;
537         spin_lock_irqsave(&dummy->mixer_lock, flags);
538         change = dummy->capture_source[addr][0] != left &&
539                  dummy->capture_source[addr][1] != right;
540         dummy->capture_source[addr][0] = left;
541         dummy->capture_source[addr][1] = right;
542         spin_unlock_irqrestore(&dummy->mixer_lock, flags);
543         return change;
544 }
545
546 static snd_kcontrol_new_t snd_dummy_controls[] = {
547 DUMMY_VOLUME("Master Volume", 0, MIXER_ADDR_MASTER),
548 DUMMY_CAPSRC("Master Capture Switch", 0, MIXER_ADDR_MASTER),
549 DUMMY_VOLUME("Synth Volume", 0, MIXER_ADDR_SYNTH),
550 DUMMY_CAPSRC("Synth Capture Switch", 0, MIXER_ADDR_MASTER),
551 DUMMY_VOLUME("Line Volume", 0, MIXER_ADDR_LINE),
552 DUMMY_CAPSRC("Line Capture Switch", 0, MIXER_ADDR_MASTER),
553 DUMMY_VOLUME("Mic Volume", 0, MIXER_ADDR_MIC),
554 DUMMY_CAPSRC("Mic Capture Switch", 0, MIXER_ADDR_MASTER),
555 DUMMY_VOLUME("CD Volume", 0, MIXER_ADDR_CD),
556 DUMMY_CAPSRC("CD Capture Switch", 0, MIXER_ADDR_MASTER)
557 };
558
559 static int __init snd_card_dummy_new_mixer(snd_card_dummy_t * dummy)
560 {
561         snd_card_t *card = dummy->card;
562         unsigned int idx;
563         int err;
564
565         snd_assert(dummy != NULL, return -EINVAL);
566         spin_lock_init(&dummy->mixer_lock);
567         strcpy(card->mixername, "Dummy Mixer");
568
569         for (idx = 0; idx < ARRAY_SIZE(snd_dummy_controls); idx++) {
570                 if ((err = snd_ctl_add(card, snd_ctl_new1(&snd_dummy_controls[idx], dummy))) < 0)
571                         return err;
572         }
573         return 0;
574 }
575
576 static int __init snd_card_dummy_probe(int dev)
577 {
578         snd_card_t *card;
579         struct snd_card_dummy *dummy;
580         int idx, err;
581
582         if (!enable[dev])
583                 return -ENODEV;
584         card = snd_card_new(index[dev], id[dev], THIS_MODULE,
585                             sizeof(struct snd_card_dummy));
586         if (card == NULL)
587                 return -ENOMEM;
588         dummy = (struct snd_card_dummy *)card->private_data;
589         dummy->card = card;
590         for (idx = 0; idx < MAX_PCM_DEVICES && idx < pcm_devs[dev]; idx++) {
591                 if (pcm_substreams[dev] < 1)
592                         pcm_substreams[dev] = 1;
593                 if (pcm_substreams[dev] > MAX_PCM_SUBSTREAMS)
594                         pcm_substreams[dev] = MAX_PCM_SUBSTREAMS;
595                 if ((err = snd_card_dummy_pcm(dummy, idx, pcm_substreams[dev])) < 0)
596                         goto __nodev;
597         }
598         if ((err = snd_card_dummy_new_mixer(dummy)) < 0)
599                 goto __nodev;
600         strcpy(card->driver, "Dummy");
601         strcpy(card->shortname, "Dummy");
602         sprintf(card->longname, "Dummy %i", dev + 1);
603
604         if ((err = snd_card_set_generic_dev(card)) < 0)
605                 goto __nodev;
606
607         if ((err = snd_card_register(card)) == 0) {
608                 snd_dummy_cards[dev] = card;
609                 return 0;
610         }
611       __nodev:
612         snd_card_free(card);
613         return err;
614 }
615
616 static int __init alsa_card_dummy_init(void)
617 {
618         int dev, cards;
619
620         for (dev = cards = 0; dev < SNDRV_CARDS && enable[dev]; dev++) {
621                 if (snd_card_dummy_probe(dev) < 0) {
622 #ifdef MODULE
623                         printk(KERN_ERR "Dummy soundcard #%i not found or device busy\n", dev + 1);
624 #endif
625                         break;
626                 }
627                 cards++;
628         }
629         if (!cards) {
630 #ifdef MODULE
631                 printk(KERN_ERR "Dummy soundcard not found or device busy\n");
632 #endif
633                 return -ENODEV;
634         }
635         return 0;
636 }
637
638 static void __exit alsa_card_dummy_exit(void)
639 {
640         int idx;
641
642         for (idx = 0; idx < SNDRV_CARDS; idx++)
643                 snd_card_free(snd_dummy_cards[idx]);
644 }
645
646 module_init(alsa_card_dummy_init)
647 module_exit(alsa_card_dummy_exit)