3 * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 #include <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>
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}}");
44 #define MAX_PCM_DEVICES 4
45 #define MAX_PCM_SUBSTREAMS 128
46 #define MAX_MIDI_DEVICES 2
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
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 int 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 int hrtimer = 1;
71 static int fake_buffer = 1;
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.");
94 static struct platform_device *devices[SNDRV_CARDS];
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
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 *);
112 #define get_dummy_ops(substream) \
113 (*(const struct dummy_timer_ops **)(substream)->runtime->private_data)
117 int (*playback_constraints)(struct snd_pcm_runtime *runtime);
118 int (*capture_constraints)(struct snd_pcm_runtime *runtime);
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;
126 unsigned int rate_min;
127 unsigned int rate_max;
128 unsigned int channels_min;
129 unsigned int channels_max;
133 struct snd_card *card;
134 struct dummy_model *model;
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];
146 static int emu10k1_playback_constraints(struct snd_pcm_runtime *runtime)
149 err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
152 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 256, UINT_MAX);
158 struct dummy_model model_emu10k1 = {
160 .playback_constraints = emu10k1_playback_constraints,
161 .buffer_bytes_max = 128 * 1024,
164 struct dummy_model model_rme9652 = {
166 .buffer_bytes_max = 26 * 64 * 1024,
167 .formats = SNDRV_PCM_FMTBIT_S32_LE,
174 struct dummy_model model_ice1712 = {
176 .buffer_bytes_max = 256 * 1024,
177 .formats = SNDRV_PCM_FMTBIT_S32_LE,
184 struct dummy_model model_uda1341 = {
186 .buffer_bytes_max = 16380,
187 .formats = SNDRV_PCM_FMTBIT_S16_LE,
194 struct dummy_model model_ac97 = {
196 .formats = SNDRV_PCM_FMTBIT_S16_LE,
199 .rates = SNDRV_PCM_RATE_48000,
204 struct dummy_model model_ca0106 = {
206 .formats = SNDRV_PCM_FMTBIT_S16_LE,
207 .buffer_bytes_max = ((65536-64)*8),
208 .period_bytes_max = (65536-64),
213 .rates = SNDRV_PCM_RATE_48000|SNDRV_PCM_RATE_96000|SNDRV_PCM_RATE_192000,
218 struct dummy_model *dummy_models[] = {
229 * system timer interface
232 struct dummy_systimer_pcm {
233 /* ops must be the first item */
234 const struct dummy_timer_ops *timer_ops;
236 struct timer_list timer;
237 unsigned long base_time;
238 unsigned int frac_pos; /* fractional sample position (based HZ) */
239 unsigned int frac_period_rest;
240 unsigned int frac_buffer_size; /* buffer_size * HZ */
241 unsigned int frac_period_size; /* period_size * HZ */
244 struct snd_pcm_substream *substream;
247 static void dummy_systimer_rearm(struct dummy_systimer_pcm *dpcm)
249 dpcm->timer.expires = jiffies +
250 (dpcm->frac_period_rest + dpcm->rate - 1) / dpcm->rate;
251 add_timer(&dpcm->timer);
254 static void dummy_systimer_update(struct dummy_systimer_pcm *dpcm)
258 delta = jiffies - dpcm->base_time;
261 dpcm->base_time += delta;
263 dpcm->frac_pos += delta;
264 while (dpcm->frac_pos >= dpcm->frac_buffer_size)
265 dpcm->frac_pos -= dpcm->frac_buffer_size;
266 while (dpcm->frac_period_rest <= delta) {
268 dpcm->frac_period_rest += dpcm->frac_period_size;
270 dpcm->frac_period_rest -= delta;
273 static int dummy_systimer_start(struct snd_pcm_substream *substream)
275 struct dummy_systimer_pcm *dpcm = substream->runtime->private_data;
276 spin_lock(&dpcm->lock);
277 dpcm->base_time = jiffies;
278 dummy_systimer_rearm(dpcm);
279 spin_unlock(&dpcm->lock);
283 static int dummy_systimer_stop(struct snd_pcm_substream *substream)
285 struct dummy_systimer_pcm *dpcm = substream->runtime->private_data;
286 spin_lock(&dpcm->lock);
287 del_timer(&dpcm->timer);
288 spin_unlock(&dpcm->lock);
292 static int dummy_systimer_prepare(struct snd_pcm_substream *substream)
294 struct snd_pcm_runtime *runtime = substream->runtime;
295 struct dummy_systimer_pcm *dpcm = runtime->private_data;
298 dpcm->rate = runtime->rate;
299 dpcm->frac_buffer_size = runtime->buffer_size * HZ;
300 dpcm->frac_period_size = runtime->period_size * HZ;
301 dpcm->frac_period_rest = dpcm->frac_period_size;
307 static void dummy_systimer_callback(unsigned long data)
309 struct dummy_systimer_pcm *dpcm = (struct dummy_systimer_pcm *)data;
313 spin_lock_irqsave(&dpcm->lock, flags);
314 dummy_systimer_update(dpcm);
315 dummy_systimer_rearm(dpcm);
316 elapsed = dpcm->elapsed;
318 spin_unlock_irqrestore(&dpcm->lock, flags);
320 snd_pcm_period_elapsed(dpcm->substream);
323 static snd_pcm_uframes_t
324 dummy_systimer_pointer(struct snd_pcm_substream *substream)
326 struct dummy_systimer_pcm *dpcm = substream->runtime->private_data;
327 snd_pcm_uframes_t pos;
329 spin_lock(&dpcm->lock);
330 dummy_systimer_update(dpcm);
331 pos = dpcm->frac_pos / HZ;
332 spin_unlock(&dpcm->lock);
336 static int dummy_systimer_create(struct snd_pcm_substream *substream)
338 struct dummy_systimer_pcm *dpcm;
340 dpcm = kzalloc(sizeof(*dpcm), GFP_KERNEL);
343 substream->runtime->private_data = dpcm;
344 init_timer(&dpcm->timer);
345 dpcm->timer.data = (unsigned long) dpcm;
346 dpcm->timer.function = dummy_systimer_callback;
347 spin_lock_init(&dpcm->lock);
348 dpcm->substream = substream;
352 static void dummy_systimer_free(struct snd_pcm_substream *substream)
354 kfree(substream->runtime->private_data);
357 static 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,
366 #ifdef CONFIG_HIGH_RES_TIMERS
371 struct dummy_hrtimer_pcm {
372 /* ops must be the first item */
373 const struct dummy_timer_ops *timer_ops;
377 struct hrtimer timer;
378 struct tasklet_struct tasklet;
379 struct snd_pcm_substream *substream;
382 static void dummy_hrtimer_pcm_elapsed(unsigned long priv)
384 struct dummy_hrtimer_pcm *dpcm = (struct dummy_hrtimer_pcm *)priv;
385 if (atomic_read(&dpcm->running))
386 snd_pcm_period_elapsed(dpcm->substream);
389 static enum hrtimer_restart dummy_hrtimer_callback(struct hrtimer *timer)
391 struct dummy_hrtimer_pcm *dpcm;
393 dpcm = container_of(timer, struct dummy_hrtimer_pcm, timer);
394 if (!atomic_read(&dpcm->running))
395 return HRTIMER_NORESTART;
396 tasklet_schedule(&dpcm->tasklet);
397 hrtimer_forward_now(timer, dpcm->period_time);
398 return HRTIMER_RESTART;
401 static int dummy_hrtimer_start(struct snd_pcm_substream *substream)
403 struct dummy_hrtimer_pcm *dpcm = substream->runtime->private_data;
405 dpcm->base_time = hrtimer_cb_get_time(&dpcm->timer);
406 hrtimer_start(&dpcm->timer, dpcm->period_time, HRTIMER_MODE_REL);
407 atomic_set(&dpcm->running, 1);
411 static int dummy_hrtimer_stop(struct snd_pcm_substream *substream)
413 struct dummy_hrtimer_pcm *dpcm = substream->runtime->private_data;
415 atomic_set(&dpcm->running, 0);
416 hrtimer_cancel(&dpcm->timer);
420 static inline void dummy_hrtimer_sync(struct dummy_hrtimer_pcm *dpcm)
422 hrtimer_cancel(&dpcm->timer);
423 tasklet_kill(&dpcm->tasklet);
426 static snd_pcm_uframes_t
427 dummy_hrtimer_pointer(struct snd_pcm_substream *substream)
429 struct snd_pcm_runtime *runtime = substream->runtime;
430 struct dummy_hrtimer_pcm *dpcm = runtime->private_data;
434 delta = ktime_us_delta(hrtimer_cb_get_time(&dpcm->timer),
436 delta = div_u64(delta * runtime->rate + 999999, 1000000);
437 div_u64_rem(delta, runtime->buffer_size, &pos);
441 static int dummy_hrtimer_prepare(struct snd_pcm_substream *substream)
443 struct snd_pcm_runtime *runtime = substream->runtime;
444 struct dummy_hrtimer_pcm *dpcm = runtime->private_data;
445 unsigned int period, rate;
449 dummy_hrtimer_sync(dpcm);
450 period = runtime->period_size;
451 rate = runtime->rate;
454 nsecs = div_u64((u64)period * 1000000000UL + rate - 1, rate);
455 dpcm->period_time = ktime_set(sec, nsecs);
460 static int dummy_hrtimer_create(struct snd_pcm_substream *substream)
462 struct dummy_hrtimer_pcm *dpcm;
464 dpcm = kzalloc(sizeof(*dpcm), GFP_KERNEL);
467 substream->runtime->private_data = dpcm;
468 hrtimer_init(&dpcm->timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
469 dpcm->timer.function = dummy_hrtimer_callback;
470 dpcm->substream = substream;
471 atomic_set(&dpcm->running, 0);
472 tasklet_init(&dpcm->tasklet, dummy_hrtimer_pcm_elapsed,
473 (unsigned long)dpcm);
477 static void dummy_hrtimer_free(struct snd_pcm_substream *substream)
479 struct dummy_hrtimer_pcm *dpcm = substream->runtime->private_data;
480 dummy_hrtimer_sync(dpcm);
484 static struct dummy_timer_ops dummy_hrtimer_ops = {
485 .create = dummy_hrtimer_create,
486 .free = dummy_hrtimer_free,
487 .prepare = dummy_hrtimer_prepare,
488 .start = dummy_hrtimer_start,
489 .stop = dummy_hrtimer_stop,
490 .pointer = dummy_hrtimer_pointer,
493 #endif /* CONFIG_HIGH_RES_TIMERS */
499 static int dummy_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
502 case SNDRV_PCM_TRIGGER_START:
503 case SNDRV_PCM_TRIGGER_RESUME:
504 return get_dummy_ops(substream)->start(substream);
505 case SNDRV_PCM_TRIGGER_STOP:
506 case SNDRV_PCM_TRIGGER_SUSPEND:
507 return get_dummy_ops(substream)->stop(substream);
512 static int dummy_pcm_prepare(struct snd_pcm_substream *substream)
514 return get_dummy_ops(substream)->prepare(substream);
517 static snd_pcm_uframes_t dummy_pcm_pointer(struct snd_pcm_substream *substream)
519 return get_dummy_ops(substream)->pointer(substream);
522 static struct snd_pcm_hardware dummy_pcm_hardware = {
523 .info = (SNDRV_PCM_INFO_MMAP |
524 SNDRV_PCM_INFO_INTERLEAVED |
525 SNDRV_PCM_INFO_RESUME |
526 SNDRV_PCM_INFO_MMAP_VALID),
527 .formats = USE_FORMATS,
529 .rate_min = USE_RATE_MIN,
530 .rate_max = USE_RATE_MAX,
531 .channels_min = USE_CHANNELS_MIN,
532 .channels_max = USE_CHANNELS_MAX,
533 .buffer_bytes_max = MAX_BUFFER_SIZE,
534 .period_bytes_min = MIN_PERIOD_SIZE,
535 .period_bytes_max = MAX_PERIOD_SIZE,
536 .periods_min = USE_PERIODS_MIN,
537 .periods_max = USE_PERIODS_MAX,
541 static int dummy_pcm_hw_params(struct snd_pcm_substream *substream,
542 struct snd_pcm_hw_params *hw_params)
545 /* runtime->dma_bytes has to be set manually to allow mmap */
546 substream->runtime->dma_bytes = params_buffer_bytes(hw_params);
549 return snd_pcm_lib_malloc_pages(substream,
550 params_buffer_bytes(hw_params));
553 static int dummy_pcm_hw_free(struct snd_pcm_substream *substream)
557 return snd_pcm_lib_free_pages(substream);
560 static int dummy_pcm_open(struct snd_pcm_substream *substream)
562 struct snd_dummy *dummy = snd_pcm_substream_chip(substream);
563 struct dummy_model *model = dummy->model;
564 struct snd_pcm_runtime *runtime = substream->runtime;
565 const struct dummy_timer_ops *ops;
568 ops = &dummy_systimer_ops;
569 #ifdef CONFIG_HIGH_RES_TIMERS
571 ops = &dummy_hrtimer_ops;
574 err = ops->create(substream);
577 get_dummy_ops(substream) = ops;
579 runtime->hw = dummy->pcm_hw;
580 if (substream->pcm->device & 1) {
581 runtime->hw.info &= ~SNDRV_PCM_INFO_INTERLEAVED;
582 runtime->hw.info |= SNDRV_PCM_INFO_NONINTERLEAVED;
584 if (substream->pcm->device & 2)
585 runtime->hw.info &= ~(SNDRV_PCM_INFO_MMAP |
586 SNDRV_PCM_INFO_MMAP_VALID);
591 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
592 if (model->playback_constraints)
593 err = model->playback_constraints(substream->runtime);
595 if (model->capture_constraints)
596 err = model->capture_constraints(substream->runtime);
599 get_dummy_ops(substream)->free(substream);
605 static int dummy_pcm_close(struct snd_pcm_substream *substream)
607 get_dummy_ops(substream)->free(substream);
612 * dummy buffer handling
615 static void *dummy_page[2];
617 static void free_fake_buffer(void)
621 for (i = 0; i < 2; i++)
623 free_page((unsigned long)dummy_page[i]);
624 dummy_page[i] = NULL;
629 static int alloc_fake_buffer(void)
635 for (i = 0; i < 2; i++) {
636 dummy_page[i] = (void *)get_zeroed_page(GFP_KERNEL);
637 if (!dummy_page[i]) {
645 static int dummy_pcm_copy(struct snd_pcm_substream *substream,
646 int channel, snd_pcm_uframes_t pos,
647 void __user *dst, snd_pcm_uframes_t count)
649 return 0; /* do nothing */
652 static int dummy_pcm_silence(struct snd_pcm_substream *substream,
653 int channel, snd_pcm_uframes_t pos,
654 snd_pcm_uframes_t count)
656 return 0; /* do nothing */
659 static struct page *dummy_pcm_page(struct snd_pcm_substream *substream,
660 unsigned long offset)
662 return virt_to_page(dummy_page[substream->stream]); /* the same page */
665 static struct snd_pcm_ops dummy_pcm_ops = {
666 .open = dummy_pcm_open,
667 .close = dummy_pcm_close,
668 .ioctl = snd_pcm_lib_ioctl,
669 .hw_params = dummy_pcm_hw_params,
670 .hw_free = dummy_pcm_hw_free,
671 .prepare = dummy_pcm_prepare,
672 .trigger = dummy_pcm_trigger,
673 .pointer = dummy_pcm_pointer,
676 static struct snd_pcm_ops dummy_pcm_ops_no_buf = {
677 .open = dummy_pcm_open,
678 .close = dummy_pcm_close,
679 .ioctl = snd_pcm_lib_ioctl,
680 .hw_params = dummy_pcm_hw_params,
681 .hw_free = dummy_pcm_hw_free,
682 .prepare = dummy_pcm_prepare,
683 .trigger = dummy_pcm_trigger,
684 .pointer = dummy_pcm_pointer,
685 .copy = dummy_pcm_copy,
686 .silence = dummy_pcm_silence,
687 .page = dummy_pcm_page,
690 static int __devinit snd_card_dummy_pcm(struct snd_dummy *dummy, int device,
694 struct snd_pcm_ops *ops;
697 err = snd_pcm_new(dummy->card, "Dummy PCM", device,
698 substreams, substreams, &pcm);
703 ops = &dummy_pcm_ops_no_buf;
705 ops = &dummy_pcm_ops;
706 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, ops);
707 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, ops);
708 pcm->private_data = dummy;
710 strcpy(pcm->name, "Dummy PCM");
712 snd_pcm_lib_preallocate_pages_for_all(pcm,
713 SNDRV_DMA_TYPE_CONTINUOUS,
714 snd_dma_continuous_data(GFP_KERNEL),
724 #define DUMMY_VOLUME(xname, xindex, addr) \
725 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, \
726 .access = SNDRV_CTL_ELEM_ACCESS_READWRITE | SNDRV_CTL_ELEM_ACCESS_TLV_READ, \
727 .name = xname, .index = xindex, \
728 .info = snd_dummy_volume_info, \
729 .get = snd_dummy_volume_get, .put = snd_dummy_volume_put, \
730 .private_value = addr, \
731 .tlv = { .p = db_scale_dummy } }
733 static int snd_dummy_volume_info(struct snd_kcontrol *kcontrol,
734 struct snd_ctl_elem_info *uinfo)
736 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
738 uinfo->value.integer.min = -50;
739 uinfo->value.integer.max = 100;
743 static int snd_dummy_volume_get(struct snd_kcontrol *kcontrol,
744 struct snd_ctl_elem_value *ucontrol)
746 struct snd_dummy *dummy = snd_kcontrol_chip(kcontrol);
747 int addr = kcontrol->private_value;
749 spin_lock_irq(&dummy->mixer_lock);
750 ucontrol->value.integer.value[0] = dummy->mixer_volume[addr][0];
751 ucontrol->value.integer.value[1] = dummy->mixer_volume[addr][1];
752 spin_unlock_irq(&dummy->mixer_lock);
756 static int snd_dummy_volume_put(struct snd_kcontrol *kcontrol,
757 struct snd_ctl_elem_value *ucontrol)
759 struct snd_dummy *dummy = snd_kcontrol_chip(kcontrol);
760 int change, addr = kcontrol->private_value;
763 left = ucontrol->value.integer.value[0];
768 right = ucontrol->value.integer.value[1];
773 spin_lock_irq(&dummy->mixer_lock);
774 change = dummy->mixer_volume[addr][0] != left ||
775 dummy->mixer_volume[addr][1] != right;
776 dummy->mixer_volume[addr][0] = left;
777 dummy->mixer_volume[addr][1] = right;
778 spin_unlock_irq(&dummy->mixer_lock);
782 static const DECLARE_TLV_DB_SCALE(db_scale_dummy, -4500, 30, 0);
784 #define DUMMY_CAPSRC(xname, xindex, addr) \
785 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
786 .info = snd_dummy_capsrc_info, \
787 .get = snd_dummy_capsrc_get, .put = snd_dummy_capsrc_put, \
788 .private_value = addr }
790 #define snd_dummy_capsrc_info snd_ctl_boolean_stereo_info
792 static int snd_dummy_capsrc_get(struct snd_kcontrol *kcontrol,
793 struct snd_ctl_elem_value *ucontrol)
795 struct snd_dummy *dummy = snd_kcontrol_chip(kcontrol);
796 int addr = kcontrol->private_value;
798 spin_lock_irq(&dummy->mixer_lock);
799 ucontrol->value.integer.value[0] = dummy->capture_source[addr][0];
800 ucontrol->value.integer.value[1] = dummy->capture_source[addr][1];
801 spin_unlock_irq(&dummy->mixer_lock);
805 static int snd_dummy_capsrc_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
807 struct snd_dummy *dummy = snd_kcontrol_chip(kcontrol);
808 int change, addr = kcontrol->private_value;
811 left = ucontrol->value.integer.value[0] & 1;
812 right = ucontrol->value.integer.value[1] & 1;
813 spin_lock_irq(&dummy->mixer_lock);
814 change = dummy->capture_source[addr][0] != left &&
815 dummy->capture_source[addr][1] != right;
816 dummy->capture_source[addr][0] = left;
817 dummy->capture_source[addr][1] = right;
818 spin_unlock_irq(&dummy->mixer_lock);
822 static struct snd_kcontrol_new snd_dummy_controls[] = {
823 DUMMY_VOLUME("Master Volume", 0, MIXER_ADDR_MASTER),
824 DUMMY_CAPSRC("Master Capture Switch", 0, MIXER_ADDR_MASTER),
825 DUMMY_VOLUME("Synth Volume", 0, MIXER_ADDR_SYNTH),
826 DUMMY_CAPSRC("Synth Capture Switch", 0, MIXER_ADDR_SYNTH),
827 DUMMY_VOLUME("Line Volume", 0, MIXER_ADDR_LINE),
828 DUMMY_CAPSRC("Line Capture Switch", 0, MIXER_ADDR_LINE),
829 DUMMY_VOLUME("Mic Volume", 0, MIXER_ADDR_MIC),
830 DUMMY_CAPSRC("Mic Capture Switch", 0, MIXER_ADDR_MIC),
831 DUMMY_VOLUME("CD Volume", 0, MIXER_ADDR_CD),
832 DUMMY_CAPSRC("CD Capture Switch", 0, MIXER_ADDR_CD)
835 static int __devinit snd_card_dummy_new_mixer(struct snd_dummy *dummy)
837 struct snd_card *card = dummy->card;
841 spin_lock_init(&dummy->mixer_lock);
842 strcpy(card->mixername, "Dummy Mixer");
844 for (idx = 0; idx < ARRAY_SIZE(snd_dummy_controls); idx++) {
845 err = snd_ctl_add(card, snd_ctl_new1(&snd_dummy_controls[idx], dummy));
852 #if defined(CONFIG_SND_DEBUG) && defined(CONFIG_PROC_FS)
856 static void print_formats(struct snd_dummy *dummy,
857 struct snd_info_buffer *buffer)
861 for (i = 0; i < SNDRV_PCM_FORMAT_LAST; i++) {
862 if (dummy->pcm_hw.formats & (1ULL << i))
863 snd_iprintf(buffer, " %s", snd_pcm_format_name(i));
867 static void print_rates(struct snd_dummy *dummy,
868 struct snd_info_buffer *buffer)
870 static int rates[] = {
871 5512, 8000, 11025, 16000, 22050, 32000, 44100, 48000,
872 64000, 88200, 96000, 176400, 192000,
876 if (dummy->pcm_hw.rates & SNDRV_PCM_RATE_CONTINUOUS)
877 snd_iprintf(buffer, " continuous");
878 if (dummy->pcm_hw.rates & SNDRV_PCM_RATE_KNOT)
879 snd_iprintf(buffer, " knot");
880 for (i = 0; i < ARRAY_SIZE(rates); i++)
881 if (dummy->pcm_hw.rates & (1 << i))
882 snd_iprintf(buffer, " %d", rates[i]);
885 #define get_dummy_int_ptr(dummy, ofs) \
886 (unsigned int *)((char *)&((dummy)->pcm_hw) + (ofs))
887 #define get_dummy_ll_ptr(dummy, ofs) \
888 (unsigned long long *)((char *)&((dummy)->pcm_hw) + (ofs))
890 struct dummy_hw_field {
896 #define FIELD_ENTRY(item, fmt) { \
899 .offset = offsetof(struct snd_pcm_hardware, item), \
900 .size = sizeof(dummy_pcm_hardware.item) }
902 static struct dummy_hw_field fields[] = {
903 FIELD_ENTRY(formats, "%#llx"),
904 FIELD_ENTRY(rates, "%#x"),
905 FIELD_ENTRY(rate_min, "%d"),
906 FIELD_ENTRY(rate_max, "%d"),
907 FIELD_ENTRY(channels_min, "%d"),
908 FIELD_ENTRY(channels_max, "%d"),
909 FIELD_ENTRY(buffer_bytes_max, "%ld"),
910 FIELD_ENTRY(period_bytes_min, "%ld"),
911 FIELD_ENTRY(period_bytes_max, "%ld"),
912 FIELD_ENTRY(periods_min, "%d"),
913 FIELD_ENTRY(periods_max, "%d"),
916 static void dummy_proc_read(struct snd_info_entry *entry,
917 struct snd_info_buffer *buffer)
919 struct snd_dummy *dummy = entry->private_data;
922 for (i = 0; i < ARRAY_SIZE(fields); i++) {
923 snd_iprintf(buffer, "%s ", fields[i].name);
924 if (fields[i].size == sizeof(int))
925 snd_iprintf(buffer, fields[i].format,
926 *get_dummy_int_ptr(dummy, fields[i].offset));
928 snd_iprintf(buffer, fields[i].format,
929 *get_dummy_ll_ptr(dummy, fields[i].offset));
930 if (!strcmp(fields[i].name, "formats"))
931 print_formats(dummy, buffer);
932 else if (!strcmp(fields[i].name, "rates"))
933 print_rates(dummy, buffer);
934 snd_iprintf(buffer, "\n");
938 static void dummy_proc_write(struct snd_info_entry *entry,
939 struct snd_info_buffer *buffer)
941 struct snd_dummy *dummy = entry->private_data;
944 while (!snd_info_get_line(buffer, line, sizeof(line))) {
947 unsigned long long val;
950 ptr = snd_info_get_str(item, line, sizeof(item));
951 for (i = 0; i < ARRAY_SIZE(fields); i++) {
952 if (!strcmp(item, fields[i].name))
955 if (i >= ARRAY_SIZE(fields))
957 snd_info_get_str(item, ptr, sizeof(item));
958 if (strict_strtoull(item, 0, &val))
960 if (fields[i].size == sizeof(int))
961 *get_dummy_int_ptr(dummy, fields[i].offset) = val;
963 *get_dummy_ll_ptr(dummy, fields[i].offset) = val;
967 static void __devinit dummy_proc_init(struct snd_dummy *chip)
969 struct snd_info_entry *entry;
971 if (!snd_card_proc_new(chip->card, "dummy_pcm", &entry)) {
972 snd_info_set_text_ops(entry, chip, dummy_proc_read);
973 entry->c.text.write = dummy_proc_write;
974 entry->mode |= S_IWUSR;
975 entry->private_data = chip;
979 #define dummy_proc_init(x)
980 #endif /* CONFIG_SND_DEBUG && CONFIG_PROC_FS */
982 static int __devinit snd_dummy_probe(struct platform_device *devptr)
984 struct snd_card *card;
985 struct snd_dummy *dummy;
986 struct dummy_model *m = NULL, **mdl;
988 int dev = devptr->id;
990 err = snd_card_create(index[dev], id[dev], THIS_MODULE,
991 sizeof(struct snd_dummy), &card);
994 dummy = card->private_data;
996 for (mdl = dummy_models; *mdl && model[dev]; mdl++) {
997 if (strcmp(model[dev], (*mdl)->name) == 0) {
999 "snd-dummy: Using model '%s' for card %i\n",
1000 (*mdl)->name, card->number);
1001 m = dummy->model = *mdl;
1005 for (idx = 0; idx < MAX_PCM_DEVICES && idx < pcm_devs[dev]; idx++) {
1006 if (pcm_substreams[dev] < 1)
1007 pcm_substreams[dev] = 1;
1008 if (pcm_substreams[dev] > MAX_PCM_SUBSTREAMS)
1009 pcm_substreams[dev] = MAX_PCM_SUBSTREAMS;
1010 err = snd_card_dummy_pcm(dummy, idx, pcm_substreams[dev]);
1015 dummy->pcm_hw = dummy_pcm_hardware;
1018 dummy->pcm_hw.formats = m->formats;
1019 if (m->buffer_bytes_max)
1020 dummy->pcm_hw.buffer_bytes_max = m->buffer_bytes_max;
1021 if (m->period_bytes_min)
1022 dummy->pcm_hw.period_bytes_min = m->period_bytes_min;
1023 if (m->period_bytes_max)
1024 dummy->pcm_hw.period_bytes_max = m->period_bytes_max;
1026 dummy->pcm_hw.periods_min = m->periods_min;
1028 dummy->pcm_hw.periods_max = m->periods_max;
1030 dummy->pcm_hw.rates = m->rates;
1032 dummy->pcm_hw.rate_min = m->rate_min;
1034 dummy->pcm_hw.rate_max = m->rate_max;
1035 if (m->channels_min)
1036 dummy->pcm_hw.channels_min = m->channels_min;
1037 if (m->channels_max)
1038 dummy->pcm_hw.channels_max = m->channels_max;
1041 err = snd_card_dummy_new_mixer(dummy);
1044 strcpy(card->driver, "Dummy");
1045 strcpy(card->shortname, "Dummy");
1046 sprintf(card->longname, "Dummy %i", dev + 1);
1048 dummy_proc_init(dummy);
1050 snd_card_set_dev(card, &devptr->dev);
1052 err = snd_card_register(card);
1054 platform_set_drvdata(devptr, card);
1058 snd_card_free(card);
1062 static int __devexit snd_dummy_remove(struct platform_device *devptr)
1064 snd_card_free(platform_get_drvdata(devptr));
1065 platform_set_drvdata(devptr, NULL);
1070 static int snd_dummy_suspend(struct platform_device *pdev, pm_message_t state)
1072 struct snd_card *card = platform_get_drvdata(pdev);
1073 struct snd_dummy *dummy = card->private_data;
1075 snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
1076 snd_pcm_suspend_all(dummy->pcm);
1080 static int snd_dummy_resume(struct platform_device *pdev)
1082 struct snd_card *card = platform_get_drvdata(pdev);
1084 snd_power_change_state(card, SNDRV_CTL_POWER_D0);
1089 #define SND_DUMMY_DRIVER "snd_dummy"
1091 static struct platform_driver snd_dummy_driver = {
1092 .probe = snd_dummy_probe,
1093 .remove = __devexit_p(snd_dummy_remove),
1095 .suspend = snd_dummy_suspend,
1096 .resume = snd_dummy_resume,
1099 .name = SND_DUMMY_DRIVER
1103 static void snd_dummy_unregister_all(void)
1107 for (i = 0; i < ARRAY_SIZE(devices); ++i)
1108 platform_device_unregister(devices[i]);
1109 platform_driver_unregister(&snd_dummy_driver);
1113 static int __init alsa_card_dummy_init(void)
1117 err = platform_driver_register(&snd_dummy_driver);
1121 err = alloc_fake_buffer();
1123 platform_driver_unregister(&snd_dummy_driver);
1128 for (i = 0; i < SNDRV_CARDS; i++) {
1129 struct platform_device *device;
1132 device = platform_device_register_simple(SND_DUMMY_DRIVER,
1136 if (!platform_get_drvdata(device)) {
1137 platform_device_unregister(device);
1140 devices[i] = device;
1145 printk(KERN_ERR "Dummy soundcard not found or device busy\n");
1147 snd_dummy_unregister_all();
1153 static void __exit alsa_card_dummy_exit(void)
1155 snd_dummy_unregister_all();
1158 module_init(alsa_card_dummy_init)
1159 module_exit(alsa_card_dummy_exit)