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TOMOYO Linux Cross Reference
Linux/sound/drivers/dummy.c

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  1 /*
  2  *  Dummy soundcard
  3  *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>
  4  *
  5  *   This program is free software; you can redistribute it and/or modify
  6  *   it under the terms of the GNU General Public License as published by
  7  *   the Free Software Foundation; either version 2 of the License, or
  8  *   (at your option) any later version.
  9  *
 10  *   This program is distributed in the hope that it will be useful,
 11  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 12  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 13  *   GNU General Public License for more details.
 14  *
 15  *   You should have received a copy of the GNU General Public License
 16  *   along with this program; if not, write to the Free Software
 17  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
 18  *
 19  */
 20 
 21 #include <linux/init.h>
 22 #include <linux/err.h>
 23 #include <linux/platform_device.h>
 24 #include <linux/jiffies.h>
 25 #include <linux/slab.h>
 26 #include <linux/time.h>
 27 #include <linux/wait.h>
 28 #include <linux/hrtimer.h>
 29 #include <linux/math64.h>
 30 #include <linux/module.h>
 31 #include <sound/core.h>
 32 #include <sound/control.h>
 33 #include <sound/tlv.h>
 34 #include <sound/pcm.h>
 35 #include <sound/rawmidi.h>
 36 #include <sound/info.h>
 37 #include <sound/initval.h>
 38 
 39 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
 40 MODULE_DESCRIPTION("Dummy soundcard (/dev/null)");
 41 MODULE_LICENSE("GPL");
 42 MODULE_SUPPORTED_DEVICE("{{ALSA,Dummy soundcard}}");
 43 
 44 #define MAX_PCM_DEVICES         4
 45 #define MAX_PCM_SUBSTREAMS      128
 46 #define MAX_MIDI_DEVICES        2
 47 
 48 /* defaults */
 49 #define MAX_BUFFER_SIZE         (64*1024)
 50 #define MIN_PERIOD_SIZE         64
 51 #define MAX_PERIOD_SIZE         MAX_BUFFER_SIZE
 52 #define USE_FORMATS             (SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE)
 53 #define USE_RATE                SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_48000
 54 #define USE_RATE_MIN            5500
 55 #define USE_RATE_MAX            48000
 56 #define USE_CHANNELS_MIN        1
 57 #define USE_CHANNELS_MAX        2
 58 #define USE_PERIODS_MIN         1
 59 #define USE_PERIODS_MAX         1024
 60 
 61 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;      /* Index 0-MAX */
 62 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;       /* ID for this card */
 63 static bool enable[SNDRV_CARDS] = {1, [1 ... (SNDRV_CARDS - 1)] = 0};
 64 static char *model[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = NULL};
 65 static int pcm_devs[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 1};
 66 static int pcm_substreams[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 8};
 67 //static int midi_devs[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 2};
 68 #ifdef CONFIG_HIGH_RES_TIMERS
 69 static bool hrtimer = 1;
 70 #endif
 71 static bool fake_buffer = 1;
 72 
 73 module_param_array(index, int, NULL, 0444);
 74 MODULE_PARM_DESC(index, "Index value for dummy soundcard.");
 75 module_param_array(id, charp, NULL, 0444);
 76 MODULE_PARM_DESC(id, "ID string for dummy soundcard.");
 77 module_param_array(enable, bool, NULL, 0444);
 78 MODULE_PARM_DESC(enable, "Enable this dummy soundcard.");
 79 module_param_array(model, charp, NULL, 0444);
 80 MODULE_PARM_DESC(model, "Soundcard model.");
 81 module_param_array(pcm_devs, int, NULL, 0444);
 82 MODULE_PARM_DESC(pcm_devs, "PCM devices # (0-4) for dummy driver.");
 83 module_param_array(pcm_substreams, int, NULL, 0444);
 84 MODULE_PARM_DESC(pcm_substreams, "PCM substreams # (1-128) for dummy driver.");
 85 //module_param_array(midi_devs, int, NULL, 0444);
 86 //MODULE_PARM_DESC(midi_devs, "MIDI devices # (0-2) for dummy driver.");
 87 module_param(fake_buffer, bool, 0444);
 88 MODULE_PARM_DESC(fake_buffer, "Fake buffer allocations.");
 89 #ifdef CONFIG_HIGH_RES_TIMERS
 90 module_param(hrtimer, bool, 0644);
 91 MODULE_PARM_DESC(hrtimer, "Use hrtimer as the timer source.");
 92 #endif
 93 
 94 static struct platform_device *devices[SNDRV_CARDS];
 95 
 96 #define MIXER_ADDR_MASTER       0
 97 #define MIXER_ADDR_LINE         1
 98 #define MIXER_ADDR_MIC          2
 99 #define MIXER_ADDR_SYNTH        3
100 #define MIXER_ADDR_CD           4
101 #define MIXER_ADDR_LAST         4
102 
103 struct dummy_timer_ops {
104         int (*create)(struct snd_pcm_substream *);
105         void (*free)(struct snd_pcm_substream *);
106         int (*prepare)(struct snd_pcm_substream *);
107         int (*start)(struct snd_pcm_substream *);
108         int (*stop)(struct snd_pcm_substream *);
109         snd_pcm_uframes_t (*pointer)(struct snd_pcm_substream *);
110 };
111 
112 #define get_dummy_ops(substream) \
113         (*(const struct dummy_timer_ops **)(substream)->runtime->private_data)
114 
115 struct dummy_model {
116         const char *name;
117         int (*playback_constraints)(struct snd_pcm_runtime *runtime);
118         int (*capture_constraints)(struct snd_pcm_runtime *runtime);
119         u64 formats;
120         size_t buffer_bytes_max;
121         size_t period_bytes_min;
122         size_t period_bytes_max;
123         unsigned int periods_min;
124         unsigned int periods_max;
125         unsigned int rates;
126         unsigned int rate_min;
127         unsigned int rate_max;
128         unsigned int channels_min;
129         unsigned int channels_max;
130 };
131 
132 struct snd_dummy {
133         struct snd_card *card;
134         struct dummy_model *model;
135         struct snd_pcm *pcm;
136         struct snd_pcm_hardware pcm_hw;
137         spinlock_t mixer_lock;
138         int mixer_volume[MIXER_ADDR_LAST+1][2];
139         int capture_source[MIXER_ADDR_LAST+1][2];
140         int iobox;
141         struct snd_kcontrol *cd_volume_ctl;
142         struct snd_kcontrol *cd_switch_ctl;
143 };
144 
145 /*
146  * card models
147  */
148 
149 static int emu10k1_playback_constraints(struct snd_pcm_runtime *runtime)
150 {
151         int err;
152         err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
153         if (err < 0)
154                 return err;
155         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 256, UINT_MAX);
156         if (err < 0)
157                 return err;
158         return 0;
159 }
160 
161 static struct dummy_model model_emu10k1 = {
162         .name = "emu10k1",
163         .playback_constraints = emu10k1_playback_constraints,
164         .buffer_bytes_max = 128 * 1024,
165 };
166 
167 static struct dummy_model model_rme9652 = {
168         .name = "rme9652",
169         .buffer_bytes_max = 26 * 64 * 1024,
170         .formats = SNDRV_PCM_FMTBIT_S32_LE,
171         .channels_min = 26,
172         .channels_max = 26,
173         .periods_min = 2,
174         .periods_max = 2,
175 };
176 
177 static struct dummy_model model_ice1712 = {
178         .name = "ice1712",
179         .buffer_bytes_max = 256 * 1024,
180         .formats = SNDRV_PCM_FMTBIT_S32_LE,
181         .channels_min = 10,
182         .channels_max = 10,
183         .periods_min = 1,
184         .periods_max = 1024,
185 };
186 
187 static struct dummy_model model_uda1341 = {
188         .name = "uda1341",
189         .buffer_bytes_max = 16380,
190         .formats = SNDRV_PCM_FMTBIT_S16_LE,
191         .channels_min = 2,
192         .channels_max = 2,
193         .periods_min = 2,
194         .periods_max = 255,
195 };
196 
197 static struct dummy_model model_ac97 = {
198         .name = "ac97",
199         .formats = SNDRV_PCM_FMTBIT_S16_LE,
200         .channels_min = 2,
201         .channels_max = 2,
202         .rates = SNDRV_PCM_RATE_48000,
203         .rate_min = 48000,
204         .rate_max = 48000,
205 };
206 
207 static struct dummy_model model_ca0106 = {
208         .name = "ca0106",
209         .formats = SNDRV_PCM_FMTBIT_S16_LE,
210         .buffer_bytes_max = ((65536-64)*8),
211         .period_bytes_max = (65536-64),
212         .periods_min = 2,
213         .periods_max = 8,
214         .channels_min = 2,
215         .channels_max = 2,
216         .rates = SNDRV_PCM_RATE_48000|SNDRV_PCM_RATE_96000|SNDRV_PCM_RATE_192000,
217         .rate_min = 48000,
218         .rate_max = 192000,
219 };
220 
221 static struct dummy_model *dummy_models[] = {
222         &model_emu10k1,
223         &model_rme9652,
224         &model_ice1712,
225         &model_uda1341,
226         &model_ac97,
227         &model_ca0106,
228         NULL
229 };
230 
231 /*
232  * system timer interface
233  */
234 
235 struct dummy_systimer_pcm {
236         /* ops must be the first item */
237         const struct dummy_timer_ops *timer_ops;
238         spinlock_t lock;
239         struct timer_list timer;
240         unsigned long base_time;
241         unsigned int frac_pos;  /* fractional sample position (based HZ) */
242         unsigned int frac_period_rest;
243         unsigned int frac_buffer_size;  /* buffer_size * HZ */
244         unsigned int frac_period_size;  /* period_size * HZ */
245         unsigned int rate;
246         int elapsed;
247         struct snd_pcm_substream *substream;
248 };
249 
250 static void dummy_systimer_rearm(struct dummy_systimer_pcm *dpcm)
251 {
252         mod_timer(&dpcm->timer, jiffies +
253                 (dpcm->frac_period_rest + dpcm->rate - 1) / dpcm->rate);
254 }
255 
256 static void dummy_systimer_update(struct dummy_systimer_pcm *dpcm)
257 {
258         unsigned long delta;
259 
260         delta = jiffies - dpcm->base_time;
261         if (!delta)
262                 return;
263         dpcm->base_time += delta;
264         delta *= dpcm->rate;
265         dpcm->frac_pos += delta;
266         while (dpcm->frac_pos >= dpcm->frac_buffer_size)
267                 dpcm->frac_pos -= dpcm->frac_buffer_size;
268         while (dpcm->frac_period_rest <= delta) {
269                 dpcm->elapsed++;
270                 dpcm->frac_period_rest += dpcm->frac_period_size;
271         }
272         dpcm->frac_period_rest -= delta;
273 }
274 
275 static int dummy_systimer_start(struct snd_pcm_substream *substream)
276 {
277         struct dummy_systimer_pcm *dpcm = substream->runtime->private_data;
278         spin_lock(&dpcm->lock);
279         dpcm->base_time = jiffies;
280         dummy_systimer_rearm(dpcm);
281         spin_unlock(&dpcm->lock);
282         return 0;
283 }
284 
285 static int dummy_systimer_stop(struct snd_pcm_substream *substream)
286 {
287         struct dummy_systimer_pcm *dpcm = substream->runtime->private_data;
288         spin_lock(&dpcm->lock);
289         del_timer(&dpcm->timer);
290         spin_unlock(&dpcm->lock);
291         return 0;
292 }
293 
294 static int dummy_systimer_prepare(struct snd_pcm_substream *substream)
295 {
296         struct snd_pcm_runtime *runtime = substream->runtime;
297         struct dummy_systimer_pcm *dpcm = runtime->private_data;
298 
299         dpcm->frac_pos = 0;
300         dpcm->rate = runtime->rate;
301         dpcm->frac_buffer_size = runtime->buffer_size * HZ;
302         dpcm->frac_period_size = runtime->period_size * HZ;
303         dpcm->frac_period_rest = dpcm->frac_period_size;
304         dpcm->elapsed = 0;
305 
306         return 0;
307 }
308 
309 static void dummy_systimer_callback(struct timer_list *t)
310 {
311         struct dummy_systimer_pcm *dpcm = from_timer(dpcm, t, timer);
312         unsigned long flags;
313         int elapsed = 0;
314         
315         spin_lock_irqsave(&dpcm->lock, flags);
316         dummy_systimer_update(dpcm);
317         dummy_systimer_rearm(dpcm);
318         elapsed = dpcm->elapsed;
319         dpcm->elapsed = 0;
320         spin_unlock_irqrestore(&dpcm->lock, flags);
321         if (elapsed)
322                 snd_pcm_period_elapsed(dpcm->substream);
323 }
324 
325 static snd_pcm_uframes_t
326 dummy_systimer_pointer(struct snd_pcm_substream *substream)
327 {
328         struct dummy_systimer_pcm *dpcm = substream->runtime->private_data;
329         snd_pcm_uframes_t pos;
330 
331         spin_lock(&dpcm->lock);
332         dummy_systimer_update(dpcm);
333         pos = dpcm->frac_pos / HZ;
334         spin_unlock(&dpcm->lock);
335         return pos;
336 }
337 
338 static int dummy_systimer_create(struct snd_pcm_substream *substream)
339 {
340         struct dummy_systimer_pcm *dpcm;
341 
342         dpcm = kzalloc(sizeof(*dpcm), GFP_KERNEL);
343         if (!dpcm)
344                 return -ENOMEM;
345         substream->runtime->private_data = dpcm;
346         timer_setup(&dpcm->timer, dummy_systimer_callback, 0);
347         spin_lock_init(&dpcm->lock);
348         dpcm->substream = substream;
349         return 0;
350 }
351 
352 static void dummy_systimer_free(struct snd_pcm_substream *substream)
353 {
354         kfree(substream->runtime->private_data);
355 }
356 
357 static const struct dummy_timer_ops dummy_systimer_ops = {
358         .create =       dummy_systimer_create,
359         .free =         dummy_systimer_free,
360         .prepare =      dummy_systimer_prepare,
361         .start =        dummy_systimer_start,
362         .stop =         dummy_systimer_stop,
363         .pointer =      dummy_systimer_pointer,
364 };
365 
366 #ifdef CONFIG_HIGH_RES_TIMERS
367 /*
368  * hrtimer interface
369  */
370 
371 struct dummy_hrtimer_pcm {
372         /* ops must be the first item */
373         const struct dummy_timer_ops *timer_ops;
374         ktime_t base_time;
375         ktime_t period_time;
376         atomic_t running;
377         struct hrtimer timer;
378         struct snd_pcm_substream *substream;
379 };
380 
381 static enum hrtimer_restart dummy_hrtimer_callback(struct hrtimer *timer)
382 {
383         struct dummy_hrtimer_pcm *dpcm;
384 
385         dpcm = container_of(timer, struct dummy_hrtimer_pcm, timer);
386         if (!atomic_read(&dpcm->running))
387                 return HRTIMER_NORESTART;
388         /*
389          * In cases of XRUN and draining, this calls .trigger to stop PCM
390          * substream.
391          */
392         snd_pcm_period_elapsed(dpcm->substream);
393         if (!atomic_read(&dpcm->running))
394                 return HRTIMER_NORESTART;
395 
396         hrtimer_forward_now(timer, dpcm->period_time);
397         return HRTIMER_RESTART;
398 }
399 
400 static int dummy_hrtimer_start(struct snd_pcm_substream *substream)
401 {
402         struct dummy_hrtimer_pcm *dpcm = substream->runtime->private_data;
403 
404         dpcm->base_time = hrtimer_cb_get_time(&dpcm->timer);
405         hrtimer_start(&dpcm->timer, dpcm->period_time, HRTIMER_MODE_REL_SOFT);
406         atomic_set(&dpcm->running, 1);
407         return 0;
408 }
409 
410 static int dummy_hrtimer_stop(struct snd_pcm_substream *substream)
411 {
412         struct dummy_hrtimer_pcm *dpcm = substream->runtime->private_data;
413 
414         atomic_set(&dpcm->running, 0);
415         if (!hrtimer_callback_running(&dpcm->timer))
416                 hrtimer_cancel(&dpcm->timer);
417         return 0;
418 }
419 
420 static inline void dummy_hrtimer_sync(struct dummy_hrtimer_pcm *dpcm)
421 {
422         hrtimer_cancel(&dpcm->timer);
423 }
424 
425 static snd_pcm_uframes_t
426 dummy_hrtimer_pointer(struct snd_pcm_substream *substream)
427 {
428         struct snd_pcm_runtime *runtime = substream->runtime;
429         struct dummy_hrtimer_pcm *dpcm = runtime->private_data;
430         u64 delta;
431         u32 pos;
432 
433         delta = ktime_us_delta(hrtimer_cb_get_time(&dpcm->timer),
434                                dpcm->base_time);
435         delta = div_u64(delta * runtime->rate + 999999, 1000000);
436         div_u64_rem(delta, runtime->buffer_size, &pos);
437         return pos;
438 }
439 
440 static int dummy_hrtimer_prepare(struct snd_pcm_substream *substream)
441 {
442         struct snd_pcm_runtime *runtime = substream->runtime;
443         struct dummy_hrtimer_pcm *dpcm = runtime->private_data;
444         unsigned int period, rate;
445         long sec;
446         unsigned long nsecs;
447 
448         dummy_hrtimer_sync(dpcm);
449         period = runtime->period_size;
450         rate = runtime->rate;
451         sec = period / rate;
452         period %= rate;
453         nsecs = div_u64((u64)period * 1000000000UL + rate - 1, rate);
454         dpcm->period_time = ktime_set(sec, nsecs);
455 
456         return 0;
457 }
458 
459 static int dummy_hrtimer_create(struct snd_pcm_substream *substream)
460 {
461         struct dummy_hrtimer_pcm *dpcm;
462 
463         dpcm = kzalloc(sizeof(*dpcm), GFP_KERNEL);
464         if (!dpcm)
465                 return -ENOMEM;
466         substream->runtime->private_data = dpcm;
467         hrtimer_init(&dpcm->timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL_SOFT);
468         dpcm->timer.function = dummy_hrtimer_callback;
469         dpcm->substream = substream;
470         atomic_set(&dpcm->running, 0);
471         return 0;
472 }
473 
474 static void dummy_hrtimer_free(struct snd_pcm_substream *substream)
475 {
476         struct dummy_hrtimer_pcm *dpcm = substream->runtime->private_data;
477         dummy_hrtimer_sync(dpcm);
478         kfree(dpcm);
479 }
480 
481 static const struct dummy_timer_ops dummy_hrtimer_ops = {
482         .create =       dummy_hrtimer_create,
483         .free =         dummy_hrtimer_free,
484         .prepare =      dummy_hrtimer_prepare,
485         .start =        dummy_hrtimer_start,
486         .stop =         dummy_hrtimer_stop,
487         .pointer =      dummy_hrtimer_pointer,
488 };
489 
490 #endif /* CONFIG_HIGH_RES_TIMERS */
491 
492 /*
493  * PCM interface
494  */
495 
496 static int dummy_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
497 {
498         switch (cmd) {
499         case SNDRV_PCM_TRIGGER_START:
500         case SNDRV_PCM_TRIGGER_RESUME:
501                 return get_dummy_ops(substream)->start(substream);
502         case SNDRV_PCM_TRIGGER_STOP:
503         case SNDRV_PCM_TRIGGER_SUSPEND:
504                 return get_dummy_ops(substream)->stop(substream);
505         }
506         return -EINVAL;
507 }
508 
509 static int dummy_pcm_prepare(struct snd_pcm_substream *substream)
510 {
511         return get_dummy_ops(substream)->prepare(substream);
512 }
513 
514 static snd_pcm_uframes_t dummy_pcm_pointer(struct snd_pcm_substream *substream)
515 {
516         return get_dummy_ops(substream)->pointer(substream);
517 }
518 
519 static const struct snd_pcm_hardware dummy_pcm_hardware = {
520         .info =                 (SNDRV_PCM_INFO_MMAP |
521                                  SNDRV_PCM_INFO_INTERLEAVED |
522                                  SNDRV_PCM_INFO_RESUME |
523                                  SNDRV_PCM_INFO_MMAP_VALID),
524         .formats =              USE_FORMATS,
525         .rates =                USE_RATE,
526         .rate_min =             USE_RATE_MIN,
527         .rate_max =             USE_RATE_MAX,
528         .channels_min =         USE_CHANNELS_MIN,
529         .channels_max =         USE_CHANNELS_MAX,
530         .buffer_bytes_max =     MAX_BUFFER_SIZE,
531         .period_bytes_min =     MIN_PERIOD_SIZE,
532         .period_bytes_max =     MAX_PERIOD_SIZE,
533         .periods_min =          USE_PERIODS_MIN,
534         .periods_max =          USE_PERIODS_MAX,
535         .fifo_size =            0,
536 };
537 
538 static int dummy_pcm_hw_params(struct snd_pcm_substream *substream,
539                                struct snd_pcm_hw_params *hw_params)
540 {
541         if (fake_buffer) {
542                 /* runtime->dma_bytes has to be set manually to allow mmap */
543                 substream->runtime->dma_bytes = params_buffer_bytes(hw_params);
544                 return 0;
545         }
546         return snd_pcm_lib_malloc_pages(substream,
547                                         params_buffer_bytes(hw_params));
548 }
549 
550 static int dummy_pcm_hw_free(struct snd_pcm_substream *substream)
551 {
552         if (fake_buffer)
553                 return 0;
554         return snd_pcm_lib_free_pages(substream);
555 }
556 
557 static int dummy_pcm_open(struct snd_pcm_substream *substream)
558 {
559         struct snd_dummy *dummy = snd_pcm_substream_chip(substream);
560         struct dummy_model *model = dummy->model;
561         struct snd_pcm_runtime *runtime = substream->runtime;
562         const struct dummy_timer_ops *ops;
563         int err;
564 
565         ops = &dummy_systimer_ops;
566 #ifdef CONFIG_HIGH_RES_TIMERS
567         if (hrtimer)
568                 ops = &dummy_hrtimer_ops;
569 #endif
570 
571         err = ops->create(substream);
572         if (err < 0)
573                 return err;
574         get_dummy_ops(substream) = ops;
575 
576         runtime->hw = dummy->pcm_hw;
577         if (substream->pcm->device & 1) {
578                 runtime->hw.info &= ~SNDRV_PCM_INFO_INTERLEAVED;
579                 runtime->hw.info |= SNDRV_PCM_INFO_NONINTERLEAVED;
580         }
581         if (substream->pcm->device & 2)
582                 runtime->hw.info &= ~(SNDRV_PCM_INFO_MMAP |
583                                       SNDRV_PCM_INFO_MMAP_VALID);
584 
585         if (model == NULL)
586                 return 0;
587 
588         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
589                 if (model->playback_constraints)
590                         err = model->playback_constraints(substream->runtime);
591         } else {
592                 if (model->capture_constraints)
593                         err = model->capture_constraints(substream->runtime);
594         }
595         if (err < 0) {
596                 get_dummy_ops(substream)->free(substream);
597                 return err;
598         }
599         return 0;
600 }
601 
602 static int dummy_pcm_close(struct snd_pcm_substream *substream)
603 {
604         get_dummy_ops(substream)->free(substream);
605         return 0;
606 }
607 
608 /*
609  * dummy buffer handling
610  */
611 
612 static void *dummy_page[2];
613 
614 static void free_fake_buffer(void)
615 {
616         if (fake_buffer) {
617                 int i;
618                 for (i = 0; i < 2; i++)
619                         if (dummy_page[i]) {
620                                 free_page((unsigned long)dummy_page[i]);
621                                 dummy_page[i] = NULL;
622                         }
623         }
624 }
625 
626 static int alloc_fake_buffer(void)
627 {
628         int i;
629 
630         if (!fake_buffer)
631                 return 0;
632         for (i = 0; i < 2; i++) {
633                 dummy_page[i] = (void *)get_zeroed_page(GFP_KERNEL);
634                 if (!dummy_page[i]) {
635                         free_fake_buffer();
636                         return -ENOMEM;
637                 }
638         }
639         return 0;
640 }
641 
642 static int dummy_pcm_copy(struct snd_pcm_substream *substream,
643                           int channel, unsigned long pos,
644                           void __user *dst, unsigned long bytes)
645 {
646         return 0; /* do nothing */
647 }
648 
649 static int dummy_pcm_copy_kernel(struct snd_pcm_substream *substream,
650                                  int channel, unsigned long pos,
651                                  void *dst, unsigned long bytes)
652 {
653         return 0; /* do nothing */
654 }
655 
656 static int dummy_pcm_silence(struct snd_pcm_substream *substream,
657                              int channel, unsigned long pos,
658                              unsigned long bytes)
659 {
660         return 0; /* do nothing */
661 }
662 
663 static struct page *dummy_pcm_page(struct snd_pcm_substream *substream,
664                                    unsigned long offset)
665 {
666         return virt_to_page(dummy_page[substream->stream]); /* the same page */
667 }
668 
669 static struct snd_pcm_ops dummy_pcm_ops = {
670         .open =         dummy_pcm_open,
671         .close =        dummy_pcm_close,
672         .ioctl =        snd_pcm_lib_ioctl,
673         .hw_params =    dummy_pcm_hw_params,
674         .hw_free =      dummy_pcm_hw_free,
675         .prepare =      dummy_pcm_prepare,
676         .trigger =      dummy_pcm_trigger,
677         .pointer =      dummy_pcm_pointer,
678 };
679 
680 static struct snd_pcm_ops dummy_pcm_ops_no_buf = {
681         .open =         dummy_pcm_open,
682         .close =        dummy_pcm_close,
683         .ioctl =        snd_pcm_lib_ioctl,
684         .hw_params =    dummy_pcm_hw_params,
685         .hw_free =      dummy_pcm_hw_free,
686         .prepare =      dummy_pcm_prepare,
687         .trigger =      dummy_pcm_trigger,
688         .pointer =      dummy_pcm_pointer,
689         .copy_user =    dummy_pcm_copy,
690         .copy_kernel =  dummy_pcm_copy_kernel,
691         .fill_silence = dummy_pcm_silence,
692         .page =         dummy_pcm_page,
693 };
694 
695 static int snd_card_dummy_pcm(struct snd_dummy *dummy, int device,
696                               int substreams)
697 {
698         struct snd_pcm *pcm;
699         struct snd_pcm_ops *ops;
700         int err;
701 
702         err = snd_pcm_new(dummy->card, "Dummy PCM", device,
703                                substreams, substreams, &pcm);
704         if (err < 0)
705                 return err;
706         dummy->pcm = pcm;
707         if (fake_buffer)
708                 ops = &dummy_pcm_ops_no_buf;
709         else
710                 ops = &dummy_pcm_ops;
711         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, ops);
712         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, ops);
713         pcm->private_data = dummy;
714         pcm->info_flags = 0;
715         strcpy(pcm->name, "Dummy PCM");
716         if (!fake_buffer) {
717                 snd_pcm_lib_preallocate_pages_for_all(pcm,
718                         SNDRV_DMA_TYPE_CONTINUOUS,
719                         snd_dma_continuous_data(GFP_KERNEL),
720                         0, 64*1024);
721         }
722         return 0;
723 }
724 
725 /*
726  * mixer interface
727  */
728 
729 #define DUMMY_VOLUME(xname, xindex, addr) \
730 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, \
731   .access = SNDRV_CTL_ELEM_ACCESS_READWRITE | SNDRV_CTL_ELEM_ACCESS_TLV_READ, \
732   .name = xname, .index = xindex, \
733   .info = snd_dummy_volume_info, \
734   .get = snd_dummy_volume_get, .put = snd_dummy_volume_put, \
735   .private_value = addr, \
736   .tlv = { .p = db_scale_dummy } }
737 
738 static int snd_dummy_volume_info(struct snd_kcontrol *kcontrol,
739                                  struct snd_ctl_elem_info *uinfo)
740 {
741         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
742         uinfo->count = 2;
743         uinfo->value.integer.min = -50;
744         uinfo->value.integer.max = 100;
745         return 0;
746 }
747  
748 static int snd_dummy_volume_get(struct snd_kcontrol *kcontrol,
749                                 struct snd_ctl_elem_value *ucontrol)
750 {
751         struct snd_dummy *dummy = snd_kcontrol_chip(kcontrol);
752         int addr = kcontrol->private_value;
753 
754         spin_lock_irq(&dummy->mixer_lock);
755         ucontrol->value.integer.value[0] = dummy->mixer_volume[addr][0];
756         ucontrol->value.integer.value[1] = dummy->mixer_volume[addr][1];
757         spin_unlock_irq(&dummy->mixer_lock);
758         return 0;
759 }
760 
761 static int snd_dummy_volume_put(struct snd_kcontrol *kcontrol,
762                                 struct snd_ctl_elem_value *ucontrol)
763 {
764         struct snd_dummy *dummy = snd_kcontrol_chip(kcontrol);
765         int change, addr = kcontrol->private_value;
766         int left, right;
767 
768         left = ucontrol->value.integer.value[0];
769         if (left < -50)
770                 left = -50;
771         if (left > 100)
772                 left = 100;
773         right = ucontrol->value.integer.value[1];
774         if (right < -50)
775                 right = -50;
776         if (right > 100)
777                 right = 100;
778         spin_lock_irq(&dummy->mixer_lock);
779         change = dummy->mixer_volume[addr][0] != left ||
780                  dummy->mixer_volume[addr][1] != right;
781         dummy->mixer_volume[addr][0] = left;
782         dummy->mixer_volume[addr][1] = right;
783         spin_unlock_irq(&dummy->mixer_lock);
784         return change;
785 }
786 
787 static const DECLARE_TLV_DB_SCALE(db_scale_dummy, -4500, 30, 0);
788 
789 #define DUMMY_CAPSRC(xname, xindex, addr) \
790 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
791   .info = snd_dummy_capsrc_info, \
792   .get = snd_dummy_capsrc_get, .put = snd_dummy_capsrc_put, \
793   .private_value = addr }
794 
795 #define snd_dummy_capsrc_info   snd_ctl_boolean_stereo_info
796  
797 static int snd_dummy_capsrc_get(struct snd_kcontrol *kcontrol,
798                                 struct snd_ctl_elem_value *ucontrol)
799 {
800         struct snd_dummy *dummy = snd_kcontrol_chip(kcontrol);
801         int addr = kcontrol->private_value;
802 
803         spin_lock_irq(&dummy->mixer_lock);
804         ucontrol->value.integer.value[0] = dummy->capture_source[addr][0];
805         ucontrol->value.integer.value[1] = dummy->capture_source[addr][1];
806         spin_unlock_irq(&dummy->mixer_lock);
807         return 0;
808 }
809 
810 static int snd_dummy_capsrc_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
811 {
812         struct snd_dummy *dummy = snd_kcontrol_chip(kcontrol);
813         int change, addr = kcontrol->private_value;
814         int left, right;
815 
816         left = ucontrol->value.integer.value[0] & 1;
817         right = ucontrol->value.integer.value[1] & 1;
818         spin_lock_irq(&dummy->mixer_lock);
819         change = dummy->capture_source[addr][0] != left &&
820                  dummy->capture_source[addr][1] != right;
821         dummy->capture_source[addr][0] = left;
822         dummy->capture_source[addr][1] = right;
823         spin_unlock_irq(&dummy->mixer_lock);
824         return change;
825 }
826 
827 static int snd_dummy_iobox_info(struct snd_kcontrol *kcontrol,
828                                 struct snd_ctl_elem_info *info)
829 {
830         static const char *const names[] = { "None", "CD Player" };
831 
832         return snd_ctl_enum_info(info, 1, 2, names);
833 }
834 
835 static int snd_dummy_iobox_get(struct snd_kcontrol *kcontrol,
836                                struct snd_ctl_elem_value *value)
837 {
838         struct snd_dummy *dummy = snd_kcontrol_chip(kcontrol);
839 
840         value->value.enumerated.item[0] = dummy->iobox;
841         return 0;
842 }
843 
844 static int snd_dummy_iobox_put(struct snd_kcontrol *kcontrol,
845                                struct snd_ctl_elem_value *value)
846 {
847         struct snd_dummy *dummy = snd_kcontrol_chip(kcontrol);
848         int changed;
849 
850         if (value->value.enumerated.item[0] > 1)
851                 return -EINVAL;
852 
853         changed = value->value.enumerated.item[0] != dummy->iobox;
854         if (changed) {
855                 dummy->iobox = value->value.enumerated.item[0];
856 
857                 if (dummy->iobox) {
858                         dummy->cd_volume_ctl->vd[0].access &=
859                                 ~SNDRV_CTL_ELEM_ACCESS_INACTIVE;
860                         dummy->cd_switch_ctl->vd[0].access &=
861                                 ~SNDRV_CTL_ELEM_ACCESS_INACTIVE;
862                 } else {
863                         dummy->cd_volume_ctl->vd[0].access |=
864                                 SNDRV_CTL_ELEM_ACCESS_INACTIVE;
865                         dummy->cd_switch_ctl->vd[0].access |=
866                                 SNDRV_CTL_ELEM_ACCESS_INACTIVE;
867                 }
868 
869                 snd_ctl_notify(dummy->card, SNDRV_CTL_EVENT_MASK_INFO,
870                                &dummy->cd_volume_ctl->id);
871                 snd_ctl_notify(dummy->card, SNDRV_CTL_EVENT_MASK_INFO,
872                                &dummy->cd_switch_ctl->id);
873         }
874 
875         return changed;
876 }
877 
878 static struct snd_kcontrol_new snd_dummy_controls[] = {
879 DUMMY_VOLUME("Master Volume", 0, MIXER_ADDR_MASTER),
880 DUMMY_CAPSRC("Master Capture Switch", 0, MIXER_ADDR_MASTER),
881 DUMMY_VOLUME("Synth Volume", 0, MIXER_ADDR_SYNTH),
882 DUMMY_CAPSRC("Synth Capture Switch", 0, MIXER_ADDR_SYNTH),
883 DUMMY_VOLUME("Line Volume", 0, MIXER_ADDR_LINE),
884 DUMMY_CAPSRC("Line Capture Switch", 0, MIXER_ADDR_LINE),
885 DUMMY_VOLUME("Mic Volume", 0, MIXER_ADDR_MIC),
886 DUMMY_CAPSRC("Mic Capture Switch", 0, MIXER_ADDR_MIC),
887 DUMMY_VOLUME("CD Volume", 0, MIXER_ADDR_CD),
888 DUMMY_CAPSRC("CD Capture Switch", 0, MIXER_ADDR_CD),
889 {
890         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
891         .name  = "External I/O Box",
892         .info  = snd_dummy_iobox_info,
893         .get   = snd_dummy_iobox_get,
894         .put   = snd_dummy_iobox_put,
895 },
896 };
897 
898 static int snd_card_dummy_new_mixer(struct snd_dummy *dummy)
899 {
900         struct snd_card *card = dummy->card;
901         struct snd_kcontrol *kcontrol;
902         unsigned int idx;
903         int err;
904 
905         spin_lock_init(&dummy->mixer_lock);
906         strcpy(card->mixername, "Dummy Mixer");
907         dummy->iobox = 1;
908 
909         for (idx = 0; idx < ARRAY_SIZE(snd_dummy_controls); idx++) {
910                 kcontrol = snd_ctl_new1(&snd_dummy_controls[idx], dummy);
911                 err = snd_ctl_add(card, kcontrol);
912                 if (err < 0)
913                         return err;
914                 if (!strcmp(kcontrol->id.name, "CD Volume"))
915                         dummy->cd_volume_ctl = kcontrol;
916                 else if (!strcmp(kcontrol->id.name, "CD Capture Switch"))
917                         dummy->cd_switch_ctl = kcontrol;
918 
919         }
920         return 0;
921 }
922 
923 #if defined(CONFIG_SND_DEBUG) && defined(CONFIG_SND_PROC_FS)
924 /*
925  * proc interface
926  */
927 static void print_formats(struct snd_dummy *dummy,
928                           struct snd_info_buffer *buffer)
929 {
930         int i;
931 
932         for (i = 0; i < SNDRV_PCM_FORMAT_LAST; i++) {
933                 if (dummy->pcm_hw.formats & (1ULL << i))
934                         snd_iprintf(buffer, " %s", snd_pcm_format_name(i));
935         }
936 }
937 
938 static void print_rates(struct snd_dummy *dummy,
939                         struct snd_info_buffer *buffer)
940 {
941         static int rates[] = {
942                 5512, 8000, 11025, 16000, 22050, 32000, 44100, 48000,
943                 64000, 88200, 96000, 176400, 192000,
944         };
945         int i;
946 
947         if (dummy->pcm_hw.rates & SNDRV_PCM_RATE_CONTINUOUS)
948                 snd_iprintf(buffer, " continuous");
949         if (dummy->pcm_hw.rates & SNDRV_PCM_RATE_KNOT)
950                 snd_iprintf(buffer, " knot");
951         for (i = 0; i < ARRAY_SIZE(rates); i++)
952                 if (dummy->pcm_hw.rates & (1 << i))
953                         snd_iprintf(buffer, " %d", rates[i]);
954 }
955 
956 #define get_dummy_int_ptr(dummy, ofs) \
957         (unsigned int *)((char *)&((dummy)->pcm_hw) + (ofs))
958 #define get_dummy_ll_ptr(dummy, ofs) \
959         (unsigned long long *)((char *)&((dummy)->pcm_hw) + (ofs))
960 
961 struct dummy_hw_field {
962         const char *name;
963         const char *format;
964         unsigned int offset;
965         unsigned int size;
966 };
967 #define FIELD_ENTRY(item, fmt) {                   \
968         .name = #item,                             \
969         .format = fmt,                             \
970         .offset = offsetof(struct snd_pcm_hardware, item), \
971         .size = sizeof(dummy_pcm_hardware.item) }
972 
973 static struct dummy_hw_field fields[] = {
974         FIELD_ENTRY(formats, "%#llx"),
975         FIELD_ENTRY(rates, "%#x"),
976         FIELD_ENTRY(rate_min, "%d"),
977         FIELD_ENTRY(rate_max, "%d"),
978         FIELD_ENTRY(channels_min, "%d"),
979         FIELD_ENTRY(channels_max, "%d"),
980         FIELD_ENTRY(buffer_bytes_max, "%ld"),
981         FIELD_ENTRY(period_bytes_min, "%ld"),
982         FIELD_ENTRY(period_bytes_max, "%ld"),
983         FIELD_ENTRY(periods_min, "%d"),
984         FIELD_ENTRY(periods_max, "%d"),
985 };
986 
987 static void dummy_proc_read(struct snd_info_entry *entry,
988                             struct snd_info_buffer *buffer)
989 {
990         struct snd_dummy *dummy = entry->private_data;
991         int i;
992 
993         for (i = 0; i < ARRAY_SIZE(fields); i++) {
994                 snd_iprintf(buffer, "%s ", fields[i].name);
995                 if (fields[i].size == sizeof(int))
996                         snd_iprintf(buffer, fields[i].format,
997                                 *get_dummy_int_ptr(dummy, fields[i].offset));
998                 else
999                         snd_iprintf(buffer, fields[i].format,
1000                                 *get_dummy_ll_ptr(dummy, fields[i].offset));
1001                 if (!strcmp(fields[i].name, "formats"))
1002                         print_formats(dummy, buffer);
1003                 else if (!strcmp(fields[i].name, "rates"))
1004                         print_rates(dummy, buffer);
1005                 snd_iprintf(buffer, "\n");
1006         }
1007 }
1008 
1009 static void dummy_proc_write(struct snd_info_entry *entry,
1010                              struct snd_info_buffer *buffer)
1011 {
1012         struct snd_dummy *dummy = entry->private_data;
1013         char line[64];
1014 
1015         while (!snd_info_get_line(buffer, line, sizeof(line))) {
1016                 char item[20];
1017                 const char *ptr;
1018                 unsigned long long val;
1019                 int i;
1020 
1021                 ptr = snd_info_get_str(item, line, sizeof(item));
1022                 for (i = 0; i < ARRAY_SIZE(fields); i++) {
1023                         if (!strcmp(item, fields[i].name))
1024                                 break;
1025                 }
1026                 if (i >= ARRAY_SIZE(fields))
1027                         continue;
1028                 snd_info_get_str(item, ptr, sizeof(item));
1029                 if (kstrtoull(item, 0, &val))
1030                         continue;
1031                 if (fields[i].size == sizeof(int))
1032                         *get_dummy_int_ptr(dummy, fields[i].offset) = val;
1033                 else
1034                         *get_dummy_ll_ptr(dummy, fields[i].offset) = val;
1035         }
1036 }
1037 
1038 static void dummy_proc_init(struct snd_dummy *chip)
1039 {
1040         snd_card_rw_proc_new(chip->card, "dummy_pcm", chip,
1041                              dummy_proc_read, dummy_proc_write);
1042 }
1043 #else
1044 #define dummy_proc_init(x)
1045 #endif /* CONFIG_SND_DEBUG && CONFIG_SND_PROC_FS */
1046 
1047 static int snd_dummy_probe(struct platform_device *devptr)
1048 {
1049         struct snd_card *card;
1050         struct snd_dummy *dummy;
1051         struct dummy_model *m = NULL, **mdl;
1052         int idx, err;
1053         int dev = devptr->id;
1054 
1055         err = snd_card_new(&devptr->dev, index[dev], id[dev], THIS_MODULE,
1056                            sizeof(struct snd_dummy), &card);
1057         if (err < 0)
1058                 return err;
1059         dummy = card->private_data;
1060         dummy->card = card;
1061         for (mdl = dummy_models; *mdl && model[dev]; mdl++) {
1062                 if (strcmp(model[dev], (*mdl)->name) == 0) {
1063                         printk(KERN_INFO
1064                                 "snd-dummy: Using model '%s' for card %i\n",
1065                                 (*mdl)->name, card->number);
1066                         m = dummy->model = *mdl;
1067                         break;
1068                 }
1069         }
1070         for (idx = 0; idx < MAX_PCM_DEVICES && idx < pcm_devs[dev]; idx++) {
1071                 if (pcm_substreams[dev] < 1)
1072                         pcm_substreams[dev] = 1;
1073                 if (pcm_substreams[dev] > MAX_PCM_SUBSTREAMS)
1074                         pcm_substreams[dev] = MAX_PCM_SUBSTREAMS;
1075                 err = snd_card_dummy_pcm(dummy, idx, pcm_substreams[dev]);
1076                 if (err < 0)
1077                         goto __nodev;
1078         }
1079 
1080         dummy->pcm_hw = dummy_pcm_hardware;
1081         if (m) {
1082                 if (m->formats)
1083                         dummy->pcm_hw.formats = m->formats;
1084                 if (m->buffer_bytes_max)
1085                         dummy->pcm_hw.buffer_bytes_max = m->buffer_bytes_max;
1086                 if (m->period_bytes_min)
1087                         dummy->pcm_hw.period_bytes_min = m->period_bytes_min;
1088                 if (m->period_bytes_max)
1089                         dummy->pcm_hw.period_bytes_max = m->period_bytes_max;
1090                 if (m->periods_min)
1091                         dummy->pcm_hw.periods_min = m->periods_min;
1092                 if (m->periods_max)
1093                         dummy->pcm_hw.periods_max = m->periods_max;
1094                 if (m->rates)
1095                         dummy->pcm_hw.rates = m->rates;
1096                 if (m->rate_min)
1097                         dummy->pcm_hw.rate_min = m->rate_min;
1098                 if (m->rate_max)
1099                         dummy->pcm_hw.rate_max = m->rate_max;
1100                 if (m->channels_min)
1101                         dummy->pcm_hw.channels_min = m->channels_min;
1102                 if (m->channels_max)
1103                         dummy->pcm_hw.channels_max = m->channels_max;
1104         }
1105 
1106         err = snd_card_dummy_new_mixer(dummy);
1107         if (err < 0)
1108                 goto __nodev;
1109         strcpy(card->driver, "Dummy");
1110         strcpy(card->shortname, "Dummy");
1111         sprintf(card->longname, "Dummy %i", dev + 1);
1112 
1113         dummy_proc_init(dummy);
1114 
1115         err = snd_card_register(card);
1116         if (err == 0) {
1117                 platform_set_drvdata(devptr, card);
1118                 return 0;
1119         }
1120       __nodev:
1121         snd_card_free(card);
1122         return err;
1123 }
1124 
1125 static int snd_dummy_remove(struct platform_device *devptr)
1126 {
1127         snd_card_free(platform_get_drvdata(devptr));
1128         return 0;
1129 }
1130 
1131 #ifdef CONFIG_PM_SLEEP
1132 static int snd_dummy_suspend(struct device *pdev)
1133 {
1134         struct snd_card *card = dev_get_drvdata(pdev);
1135 
1136         snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
1137         return 0;
1138 }
1139         
1140 static int snd_dummy_resume(struct device *pdev)
1141 {
1142         struct snd_card *card = dev_get_drvdata(pdev);
1143 
1144         snd_power_change_state(card, SNDRV_CTL_POWER_D0);
1145         return 0;
1146 }
1147 
1148 static SIMPLE_DEV_PM_OPS(snd_dummy_pm, snd_dummy_suspend, snd_dummy_resume);
1149 #define SND_DUMMY_PM_OPS        &snd_dummy_pm
1150 #else
1151 #define SND_DUMMY_PM_OPS        NULL
1152 #endif
1153 
1154 #define SND_DUMMY_DRIVER        "snd_dummy"
1155 
1156 static struct platform_driver snd_dummy_driver = {
1157         .probe          = snd_dummy_probe,
1158         .remove         = snd_dummy_remove,
1159         .driver         = {
1160                 .name   = SND_DUMMY_DRIVER,
1161                 .pm     = SND_DUMMY_PM_OPS,
1162         },
1163 };
1164 
1165 static void snd_dummy_unregister_all(void)
1166 {
1167         int i;
1168 
1169         for (i = 0; i < ARRAY_SIZE(devices); ++i)
1170                 platform_device_unregister(devices[i]);
1171         platform_driver_unregister(&snd_dummy_driver);
1172         free_fake_buffer();
1173 }
1174 
1175 static int __init alsa_card_dummy_init(void)
1176 {
1177         int i, cards, err;
1178 
1179         err = platform_driver_register(&snd_dummy_driver);
1180         if (err < 0)
1181                 return err;
1182 
1183         err = alloc_fake_buffer();
1184         if (err < 0) {
1185                 platform_driver_unregister(&snd_dummy_driver);
1186                 return err;
1187         }
1188 
1189         cards = 0;
1190         for (i = 0; i < SNDRV_CARDS; i++) {
1191                 struct platform_device *device;
1192                 if (! enable[i])
1193                         continue;
1194                 device = platform_device_register_simple(SND_DUMMY_DRIVER,
1195                                                          i, NULL, 0);
1196                 if (IS_ERR(device))
1197                         continue;
1198                 if (!platform_get_drvdata(device)) {
1199                         platform_device_unregister(device);
1200                         continue;
1201                 }
1202                 devices[i] = device;
1203                 cards++;
1204         }
1205         if (!cards) {
1206 #ifdef MODULE
1207                 printk(KERN_ERR "Dummy soundcard not found or device busy\n");
1208 #endif
1209                 snd_dummy_unregister_all();
1210                 return -ENODEV;
1211         }
1212         return 0;
1213 }
1214 
1215 static void __exit alsa_card_dummy_exit(void)
1216 {
1217         snd_dummy_unregister_all();
1218 }
1219 
1220 module_init(alsa_card_dummy_init)
1221 module_exit(alsa_card_dummy_exit)
1222 

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