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/moduleparam.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/initval.h>
38 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
39 MODULE_DESCRIPTION("Dummy soundcard (/dev/null)");
40 MODULE_LICENSE("GPL");
41 MODULE_SUPPORTED_DEVICE("{{ALSA,Dummy soundcard}}");
43 #define MAX_PCM_DEVICES 4
44 #define MAX_PCM_SUBSTREAMS 16
45 #define MAX_MIDI_DEVICES 2
47 #if 0 /* emu10k1 emulation */
48 #define MAX_BUFFER_SIZE (128 * 1024)
49 static int emu10k1_playback_constraints(struct snd_pcm_runtime *runtime)
52 err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
55 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 256, UINT_MAX);
60 #define add_playback_constraints emu10k1_playback_constraints
63 #if 0 /* RME9652 emulation */
64 #define MAX_BUFFER_SIZE (26 * 64 * 1024)
65 #define USE_FORMATS SNDRV_PCM_FMTBIT_S32_LE
66 #define USE_CHANNELS_MIN 26
67 #define USE_CHANNELS_MAX 26
68 #define USE_PERIODS_MIN 2
69 #define USE_PERIODS_MAX 2
72 #if 0 /* ICE1712 emulation */
73 #define MAX_BUFFER_SIZE (256 * 1024)
74 #define USE_FORMATS SNDRV_PCM_FMTBIT_S32_LE
75 #define USE_CHANNELS_MIN 10
76 #define USE_CHANNELS_MAX 10
77 #define USE_PERIODS_MIN 1
78 #define USE_PERIODS_MAX 1024
81 #if 0 /* UDA1341 emulation */
82 #define MAX_BUFFER_SIZE (16380)
83 #define USE_FORMATS SNDRV_PCM_FMTBIT_S16_LE
84 #define USE_CHANNELS_MIN 2
85 #define USE_CHANNELS_MAX 2
86 #define USE_PERIODS_MIN 2
87 #define USE_PERIODS_MAX 255
90 #if 0 /* simple AC97 bridge (intel8x0) with 48kHz AC97 only codec */
91 #define USE_FORMATS SNDRV_PCM_FMTBIT_S16_LE
92 #define USE_CHANNELS_MIN 2
93 #define USE_CHANNELS_MAX 2
94 #define USE_RATE SNDRV_PCM_RATE_48000
95 #define USE_RATE_MIN 48000
96 #define USE_RATE_MAX 48000
100 #define USE_FORMATS SNDRV_PCM_FMTBIT_S16_LE
101 #define USE_CHANNELS_MIN 2
102 #define USE_CHANNELS_MAX 2
103 #define USE_RATE (SNDRV_PCM_RATE_48000|SNDRV_PCM_RATE_96000|SNDRV_PCM_RATE_192000)
104 #define USE_RATE_MIN 48000
105 #define USE_RATE_MAX 192000
106 #define MAX_BUFFER_SIZE ((65536-64)*8)
107 #define MAX_PERIOD_SIZE (65536-64)
108 #define USE_PERIODS_MIN 2
109 #define USE_PERIODS_MAX 8
114 #ifndef MAX_BUFFER_SIZE
115 #define MAX_BUFFER_SIZE (64*1024)
117 #ifndef MAX_PERIOD_SIZE
118 #define MAX_PERIOD_SIZE MAX_BUFFER_SIZE
121 #define USE_FORMATS (SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE)
124 #define USE_RATE SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_48000
125 #define USE_RATE_MIN 5500
126 #define USE_RATE_MAX 48000
128 #ifndef USE_CHANNELS_MIN
129 #define USE_CHANNELS_MIN 1
131 #ifndef USE_CHANNELS_MAX
132 #define USE_CHANNELS_MAX 2
134 #ifndef USE_PERIODS_MIN
135 #define USE_PERIODS_MIN 1
137 #ifndef USE_PERIODS_MAX
138 #define USE_PERIODS_MAX 1024
140 #ifndef add_playback_constraints
141 #define add_playback_constraints(x) 0
143 #ifndef add_capture_constraints
144 #define add_capture_constraints(x) 0
147 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-MAX */
148 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* ID for this card */
149 static int enable[SNDRV_CARDS] = {1, [1 ... (SNDRV_CARDS - 1)] = 0};
150 static int pcm_devs[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 1};
151 static int pcm_substreams[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 8};
152 //static int midi_devs[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 2};
153 #ifdef CONFIG_HIGH_RES_TIMERS
154 static int hrtimer = 1;
157 module_param_array(index, int, NULL, 0444);
158 MODULE_PARM_DESC(index, "Index value for dummy soundcard.");
159 module_param_array(id, charp, NULL, 0444);
160 MODULE_PARM_DESC(id, "ID string for dummy soundcard.");
161 module_param_array(enable, bool, NULL, 0444);
162 MODULE_PARM_DESC(enable, "Enable this dummy soundcard.");
163 module_param_array(pcm_devs, int, NULL, 0444);
164 MODULE_PARM_DESC(pcm_devs, "PCM devices # (0-4) for dummy driver.");
165 module_param_array(pcm_substreams, int, NULL, 0444);
166 MODULE_PARM_DESC(pcm_substreams, "PCM substreams # (1-16) for dummy driver.");
167 //module_param_array(midi_devs, int, NULL, 0444);
168 //MODULE_PARM_DESC(midi_devs, "MIDI devices # (0-2) for dummy driver.");
169 #ifdef CONFIG_HIGH_RES_TIMERS
170 module_param(hrtimer, bool, 0644);
171 MODULE_PARM_DESC(hrtimer, "Use hrtimer as the timer source.");
174 static struct platform_device *devices[SNDRV_CARDS];
176 #define MIXER_ADDR_MASTER 0
177 #define MIXER_ADDR_LINE 1
178 #define MIXER_ADDR_MIC 2
179 #define MIXER_ADDR_SYNTH 3
180 #define MIXER_ADDR_CD 4
181 #define MIXER_ADDR_LAST 4
183 struct dummy_timer_ops {
184 int (*create)(struct snd_pcm_substream *);
185 void (*free)(struct snd_pcm_substream *);
186 int (*prepare)(struct snd_pcm_substream *);
187 int (*start)(struct snd_pcm_substream *);
188 int (*stop)(struct snd_pcm_substream *);
189 snd_pcm_uframes_t (*pointer)(struct snd_pcm_substream *);
193 struct snd_card *card;
195 spinlock_t mixer_lock;
196 int mixer_volume[MIXER_ADDR_LAST+1][2];
197 int capture_source[MIXER_ADDR_LAST+1][2];
198 const struct dummy_timer_ops *timer_ops;
202 * system timer interface
205 struct dummy_systimer_pcm {
207 struct timer_list timer;
208 unsigned int pcm_buffer_size;
209 unsigned int pcm_period_size;
210 unsigned int pcm_bps; /* bytes per second */
211 unsigned int pcm_hz; /* HZ */
212 unsigned int pcm_irq_pos; /* IRQ position */
213 unsigned int pcm_buf_pos; /* position in buffer */
214 struct snd_pcm_substream *substream;
217 static int dummy_systimer_start(struct snd_pcm_substream *substream)
219 struct dummy_systimer_pcm *dpcm = substream->runtime->private_data;
220 spin_lock(&dpcm->lock);
221 dpcm->timer.expires = 1 + jiffies;
222 add_timer(&dpcm->timer);
223 spin_unlock(&dpcm->lock);
227 static int dummy_systimer_stop(struct snd_pcm_substream *substream)
229 struct dummy_systimer_pcm *dpcm = substream->runtime->private_data;
230 spin_lock(&dpcm->lock);
231 del_timer(&dpcm->timer);
232 spin_unlock(&dpcm->lock);
236 static int dummy_systimer_prepare(struct snd_pcm_substream *substream)
238 struct snd_pcm_runtime *runtime = substream->runtime;
239 struct dummy_systimer_pcm *dpcm = runtime->private_data;
242 bps = snd_pcm_format_width(runtime->format) * runtime->rate *
243 runtime->channels / 8;
250 dpcm->pcm_buffer_size = snd_pcm_lib_buffer_bytes(substream);
251 dpcm->pcm_period_size = snd_pcm_lib_period_bytes(substream);
252 dpcm->pcm_irq_pos = 0;
253 dpcm->pcm_buf_pos = 0;
258 static void dummy_systimer_callback(unsigned long data)
260 struct dummy_systimer_pcm *dpcm = (struct dummy_systimer_pcm *)data;
263 spin_lock_irqsave(&dpcm->lock, flags);
264 dpcm->timer.expires = 1 + jiffies;
265 add_timer(&dpcm->timer);
266 dpcm->pcm_irq_pos += dpcm->pcm_bps;
267 dpcm->pcm_buf_pos += dpcm->pcm_bps;
268 dpcm->pcm_buf_pos %= dpcm->pcm_buffer_size * dpcm->pcm_hz;
269 if (dpcm->pcm_irq_pos >= dpcm->pcm_period_size * dpcm->pcm_hz) {
270 dpcm->pcm_irq_pos %= dpcm->pcm_period_size * dpcm->pcm_hz;
271 spin_unlock_irqrestore(&dpcm->lock, flags);
272 snd_pcm_period_elapsed(dpcm->substream);
274 spin_unlock_irqrestore(&dpcm->lock, flags);
277 static snd_pcm_uframes_t
278 dummy_systimer_pointer(struct snd_pcm_substream *substream)
280 struct snd_pcm_runtime *runtime = substream->runtime;
281 struct dummy_systimer_pcm *dpcm = runtime->private_data;
283 return bytes_to_frames(runtime, dpcm->pcm_buf_pos / dpcm->pcm_hz);
286 static int dummy_systimer_create(struct snd_pcm_substream *substream)
288 struct dummy_systimer_pcm *dpcm;
290 dpcm = kzalloc(sizeof(*dpcm), GFP_KERNEL);
293 substream->runtime->private_data = dpcm;
294 init_timer(&dpcm->timer);
295 dpcm->timer.data = (unsigned long) dpcm;
296 dpcm->timer.function = dummy_systimer_callback;
297 spin_lock_init(&dpcm->lock);
298 dpcm->substream = substream;
302 static void dummy_systimer_free(struct snd_pcm_substream *substream)
304 kfree(substream->runtime->private_data);
307 static struct dummy_timer_ops dummy_systimer_ops = {
308 .create = dummy_systimer_create,
309 .free = dummy_systimer_free,
310 .prepare = dummy_systimer_prepare,
311 .start = dummy_systimer_start,
312 .stop = dummy_systimer_stop,
313 .pointer = dummy_systimer_pointer,
316 #ifdef CONFIG_HIGH_RES_TIMERS
321 struct dummy_hrtimer_pcm {
325 struct hrtimer timer;
326 struct tasklet_struct tasklet;
327 struct snd_pcm_substream *substream;
330 static void dummy_hrtimer_pcm_elapsed(unsigned long priv)
332 struct dummy_hrtimer_pcm *dpcm = (struct dummy_hrtimer_pcm *)priv;
333 if (atomic_read(&dpcm->running))
334 snd_pcm_period_elapsed(dpcm->substream);
337 static enum hrtimer_restart dummy_hrtimer_callback(struct hrtimer *timer)
339 struct dummy_hrtimer_pcm *dpcm;
341 dpcm = container_of(timer, struct dummy_hrtimer_pcm, timer);
342 if (!atomic_read(&dpcm->running))
343 return HRTIMER_NORESTART;
344 tasklet_schedule(&dpcm->tasklet);
345 hrtimer_forward_now(timer, dpcm->period_time);
346 return HRTIMER_RESTART;
349 static int dummy_hrtimer_start(struct snd_pcm_substream *substream)
351 struct dummy_hrtimer_pcm *dpcm = substream->runtime->private_data;
353 dpcm->base_time = hrtimer_cb_get_time(&dpcm->timer);
354 hrtimer_start(&dpcm->timer, dpcm->period_time, HRTIMER_MODE_REL);
355 atomic_set(&dpcm->running, 1);
359 static int dummy_hrtimer_stop(struct snd_pcm_substream *substream)
361 struct dummy_hrtimer_pcm *dpcm = substream->runtime->private_data;
363 atomic_set(&dpcm->running, 0);
364 hrtimer_cancel(&dpcm->timer);
368 static inline void dummy_hrtimer_sync(struct dummy_hrtimer_pcm *dpcm)
370 tasklet_kill(&dpcm->tasklet);
373 static snd_pcm_uframes_t
374 dummy_hrtimer_pointer(struct snd_pcm_substream *substream)
376 struct snd_pcm_runtime *runtime = substream->runtime;
377 struct dummy_hrtimer_pcm *dpcm = runtime->private_data;
381 delta = ktime_us_delta(hrtimer_cb_get_time(&dpcm->timer),
383 delta = div_u64(delta * runtime->rate + 999999, 1000000);
384 div_u64_rem(delta, runtime->buffer_size, &pos);
388 static int dummy_hrtimer_prepare(struct snd_pcm_substream *substream)
390 struct snd_pcm_runtime *runtime = substream->runtime;
391 struct dummy_hrtimer_pcm *dpcm = runtime->private_data;
392 unsigned int period, rate;
396 dummy_hrtimer_sync(dpcm);
397 period = runtime->period_size;
398 rate = runtime->rate;
401 nsecs = div_u64((u64)period * 1000000000UL + rate - 1, rate);
402 dpcm->period_time = ktime_set(sec, nsecs);
407 static int dummy_hrtimer_create(struct snd_pcm_substream *substream)
409 struct dummy_hrtimer_pcm *dpcm;
411 dpcm = kzalloc(sizeof(*dpcm), GFP_KERNEL);
414 substream->runtime->private_data = dpcm;
415 hrtimer_init(&dpcm->timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
416 dpcm->timer.function = dummy_hrtimer_callback;
417 dpcm->substream = substream;
418 atomic_set(&dpcm->running, 0);
419 tasklet_init(&dpcm->tasklet, dummy_hrtimer_pcm_elapsed,
420 (unsigned long)dpcm);
424 static void dummy_hrtimer_free(struct snd_pcm_substream *substream)
426 struct dummy_hrtimer_pcm *dpcm = substream->runtime->private_data;
427 dummy_hrtimer_sync(dpcm);
431 static struct dummy_timer_ops dummy_hrtimer_ops = {
432 .create = dummy_hrtimer_create,
433 .free = dummy_hrtimer_free,
434 .prepare = dummy_hrtimer_prepare,
435 .start = dummy_hrtimer_start,
436 .stop = dummy_hrtimer_stop,
437 .pointer = dummy_hrtimer_pointer,
440 #endif /* CONFIG_HIGH_RES_TIMERS */
446 static int dummy_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
448 struct snd_dummy *dummy = snd_pcm_substream_chip(substream);
451 case SNDRV_PCM_TRIGGER_START:
452 case SNDRV_PCM_TRIGGER_RESUME:
453 return dummy->timer_ops->start(substream);
454 case SNDRV_PCM_TRIGGER_STOP:
455 case SNDRV_PCM_TRIGGER_SUSPEND:
456 return dummy->timer_ops->stop(substream);
461 static int dummy_pcm_prepare(struct snd_pcm_substream *substream)
463 struct snd_pcm_runtime *runtime = substream->runtime;
464 struct snd_dummy *dummy = snd_pcm_substream_chip(substream);
466 snd_pcm_format_set_silence(runtime->format, runtime->dma_area,
467 bytes_to_samples(runtime, runtime->dma_bytes));
468 return dummy->timer_ops->prepare(substream);
471 static snd_pcm_uframes_t dummy_pcm_pointer(struct snd_pcm_substream *substream)
473 struct snd_dummy *dummy = snd_pcm_substream_chip(substream);
475 return dummy->timer_ops->pointer(substream);
478 static struct snd_pcm_hardware dummy_pcm_hardware = {
479 .info = (SNDRV_PCM_INFO_MMAP |
480 SNDRV_PCM_INFO_INTERLEAVED |
481 SNDRV_PCM_INFO_RESUME |
482 SNDRV_PCM_INFO_MMAP_VALID),
483 .formats = USE_FORMATS,
485 .rate_min = USE_RATE_MIN,
486 .rate_max = USE_RATE_MAX,
487 .channels_min = USE_CHANNELS_MIN,
488 .channels_max = USE_CHANNELS_MAX,
489 .buffer_bytes_max = MAX_BUFFER_SIZE,
490 .period_bytes_min = 64,
491 .period_bytes_max = MAX_PERIOD_SIZE,
492 .periods_min = USE_PERIODS_MIN,
493 .periods_max = USE_PERIODS_MAX,
497 static int dummy_pcm_hw_params(struct snd_pcm_substream *substream,
498 struct snd_pcm_hw_params *hw_params)
500 return snd_pcm_lib_malloc_pages(substream,
501 params_buffer_bytes(hw_params));
504 static int dummy_pcm_hw_free(struct snd_pcm_substream *substream)
506 return snd_pcm_lib_free_pages(substream);
509 static int dummy_pcm_open(struct snd_pcm_substream *substream)
511 struct snd_dummy *dummy = snd_pcm_substream_chip(substream);
512 struct snd_pcm_runtime *runtime = substream->runtime;
515 dummy->timer_ops = &dummy_systimer_ops;
516 #ifdef CONFIG_HIGH_RES_TIMERS
518 dummy->timer_ops = &dummy_hrtimer_ops;
521 err = dummy->timer_ops->create(substream);
525 runtime->hw = dummy_pcm_hardware;
526 if (substream->pcm->device & 1) {
527 runtime->hw.info &= ~SNDRV_PCM_INFO_INTERLEAVED;
528 runtime->hw.info |= SNDRV_PCM_INFO_NONINTERLEAVED;
530 if (substream->pcm->device & 2)
531 runtime->hw.info &= ~(SNDRV_PCM_INFO_MMAP |
532 SNDRV_PCM_INFO_MMAP_VALID);
534 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
535 err = add_playback_constraints(substream->runtime);
537 err = add_capture_constraints(substream->runtime);
539 dummy->timer_ops->free(substream);
545 static int dummy_pcm_close(struct snd_pcm_substream *substream)
547 struct snd_dummy *dummy = snd_pcm_substream_chip(substream);
548 dummy->timer_ops->free(substream);
552 static struct snd_pcm_ops dummy_pcm_ops = {
553 .open = dummy_pcm_open,
554 .close = dummy_pcm_close,
555 .ioctl = snd_pcm_lib_ioctl,
556 .hw_params = dummy_pcm_hw_params,
557 .hw_free = dummy_pcm_hw_free,
558 .prepare = dummy_pcm_prepare,
559 .trigger = dummy_pcm_trigger,
560 .pointer = dummy_pcm_pointer,
563 static int __devinit snd_card_dummy_pcm(struct snd_dummy *dummy, int device,
569 err = snd_pcm_new(dummy->card, "Dummy PCM", device,
570 substreams, substreams, &pcm);
574 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &dummy_pcm_ops);
575 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &dummy_pcm_ops);
576 pcm->private_data = dummy;
578 strcpy(pcm->name, "Dummy PCM");
579 snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_CONTINUOUS,
580 snd_dma_continuous_data(GFP_KERNEL),
585 #define DUMMY_VOLUME(xname, xindex, addr) \
586 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, \
587 .access = SNDRV_CTL_ELEM_ACCESS_READWRITE | SNDRV_CTL_ELEM_ACCESS_TLV_READ, \
588 .name = xname, .index = xindex, \
589 .info = snd_dummy_volume_info, \
590 .get = snd_dummy_volume_get, .put = snd_dummy_volume_put, \
591 .private_value = addr, \
592 .tlv = { .p = db_scale_dummy } }
594 static int snd_dummy_volume_info(struct snd_kcontrol *kcontrol,
595 struct snd_ctl_elem_info *uinfo)
597 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
599 uinfo->value.integer.min = -50;
600 uinfo->value.integer.max = 100;
604 static int snd_dummy_volume_get(struct snd_kcontrol *kcontrol,
605 struct snd_ctl_elem_value *ucontrol)
607 struct snd_dummy *dummy = snd_kcontrol_chip(kcontrol);
608 int addr = kcontrol->private_value;
610 spin_lock_irq(&dummy->mixer_lock);
611 ucontrol->value.integer.value[0] = dummy->mixer_volume[addr][0];
612 ucontrol->value.integer.value[1] = dummy->mixer_volume[addr][1];
613 spin_unlock_irq(&dummy->mixer_lock);
617 static int snd_dummy_volume_put(struct snd_kcontrol *kcontrol,
618 struct snd_ctl_elem_value *ucontrol)
620 struct snd_dummy *dummy = snd_kcontrol_chip(kcontrol);
621 int change, addr = kcontrol->private_value;
624 left = ucontrol->value.integer.value[0];
629 right = ucontrol->value.integer.value[1];
634 spin_lock_irq(&dummy->mixer_lock);
635 change = dummy->mixer_volume[addr][0] != left ||
636 dummy->mixer_volume[addr][1] != right;
637 dummy->mixer_volume[addr][0] = left;
638 dummy->mixer_volume[addr][1] = right;
639 spin_unlock_irq(&dummy->mixer_lock);
643 static const DECLARE_TLV_DB_SCALE(db_scale_dummy, -4500, 30, 0);
645 #define DUMMY_CAPSRC(xname, xindex, addr) \
646 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
647 .info = snd_dummy_capsrc_info, \
648 .get = snd_dummy_capsrc_get, .put = snd_dummy_capsrc_put, \
649 .private_value = addr }
651 #define snd_dummy_capsrc_info snd_ctl_boolean_stereo_info
653 static int snd_dummy_capsrc_get(struct snd_kcontrol *kcontrol,
654 struct snd_ctl_elem_value *ucontrol)
656 struct snd_dummy *dummy = snd_kcontrol_chip(kcontrol);
657 int addr = kcontrol->private_value;
659 spin_lock_irq(&dummy->mixer_lock);
660 ucontrol->value.integer.value[0] = dummy->capture_source[addr][0];
661 ucontrol->value.integer.value[1] = dummy->capture_source[addr][1];
662 spin_unlock_irq(&dummy->mixer_lock);
666 static int snd_dummy_capsrc_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
668 struct snd_dummy *dummy = snd_kcontrol_chip(kcontrol);
669 int change, addr = kcontrol->private_value;
672 left = ucontrol->value.integer.value[0] & 1;
673 right = ucontrol->value.integer.value[1] & 1;
674 spin_lock_irq(&dummy->mixer_lock);
675 change = dummy->capture_source[addr][0] != left &&
676 dummy->capture_source[addr][1] != right;
677 dummy->capture_source[addr][0] = left;
678 dummy->capture_source[addr][1] = right;
679 spin_unlock_irq(&dummy->mixer_lock);
683 static struct snd_kcontrol_new snd_dummy_controls[] = {
684 DUMMY_VOLUME("Master Volume", 0, MIXER_ADDR_MASTER),
685 DUMMY_CAPSRC("Master Capture Switch", 0, MIXER_ADDR_MASTER),
686 DUMMY_VOLUME("Synth Volume", 0, MIXER_ADDR_SYNTH),
687 DUMMY_CAPSRC("Synth Capture Switch", 0, MIXER_ADDR_SYNTH),
688 DUMMY_VOLUME("Line Volume", 0, MIXER_ADDR_LINE),
689 DUMMY_CAPSRC("Line Capture Switch", 0, MIXER_ADDR_LINE),
690 DUMMY_VOLUME("Mic Volume", 0, MIXER_ADDR_MIC),
691 DUMMY_CAPSRC("Mic Capture Switch", 0, MIXER_ADDR_MIC),
692 DUMMY_VOLUME("CD Volume", 0, MIXER_ADDR_CD),
693 DUMMY_CAPSRC("CD Capture Switch", 0, MIXER_ADDR_CD)
696 static int __devinit snd_card_dummy_new_mixer(struct snd_dummy *dummy)
698 struct snd_card *card = dummy->card;
702 if (snd_BUG_ON(!dummy))
704 spin_lock_init(&dummy->mixer_lock);
705 strcpy(card->mixername, "Dummy Mixer");
707 for (idx = 0; idx < ARRAY_SIZE(snd_dummy_controls); idx++) {
708 err = snd_ctl_add(card, snd_ctl_new1(&snd_dummy_controls[idx], dummy));
715 static int __devinit snd_dummy_probe(struct platform_device *devptr)
717 struct snd_card *card;
718 struct snd_dummy *dummy;
720 int dev = devptr->id;
722 err = snd_card_create(index[dev], id[dev], THIS_MODULE,
723 sizeof(struct snd_dummy), &card);
726 dummy = card->private_data;
728 for (idx = 0; idx < MAX_PCM_DEVICES && idx < pcm_devs[dev]; idx++) {
729 if (pcm_substreams[dev] < 1)
730 pcm_substreams[dev] = 1;
731 if (pcm_substreams[dev] > MAX_PCM_SUBSTREAMS)
732 pcm_substreams[dev] = MAX_PCM_SUBSTREAMS;
733 err = snd_card_dummy_pcm(dummy, idx, pcm_substreams[dev]);
737 err = snd_card_dummy_new_mixer(dummy);
740 strcpy(card->driver, "Dummy");
741 strcpy(card->shortname, "Dummy");
742 sprintf(card->longname, "Dummy %i", dev + 1);
744 snd_card_set_dev(card, &devptr->dev);
746 err = snd_card_register(card);
748 platform_set_drvdata(devptr, card);
756 static int __devexit snd_dummy_remove(struct platform_device *devptr)
758 snd_card_free(platform_get_drvdata(devptr));
759 platform_set_drvdata(devptr, NULL);
764 static int snd_dummy_suspend(struct platform_device *pdev, pm_message_t state)
766 struct snd_card *card = platform_get_drvdata(pdev);
767 struct snd_dummy *dummy = card->private_data;
769 snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
770 snd_pcm_suspend_all(dummy->pcm);
774 static int snd_dummy_resume(struct platform_device *pdev)
776 struct snd_card *card = platform_get_drvdata(pdev);
778 snd_power_change_state(card, SNDRV_CTL_POWER_D0);
783 #define SND_DUMMY_DRIVER "snd_dummy"
785 static struct platform_driver snd_dummy_driver = {
786 .probe = snd_dummy_probe,
787 .remove = __devexit_p(snd_dummy_remove),
789 .suspend = snd_dummy_suspend,
790 .resume = snd_dummy_resume,
793 .name = SND_DUMMY_DRIVER
797 static void snd_dummy_unregister_all(void)
801 for (i = 0; i < ARRAY_SIZE(devices); ++i)
802 platform_device_unregister(devices[i]);
803 platform_driver_unregister(&snd_dummy_driver);
806 static int __init alsa_card_dummy_init(void)
810 err = platform_driver_register(&snd_dummy_driver);
815 for (i = 0; i < SNDRV_CARDS; i++) {
816 struct platform_device *device;
819 device = platform_device_register_simple(SND_DUMMY_DRIVER,
823 if (!platform_get_drvdata(device)) {
824 platform_device_unregister(device);
832 printk(KERN_ERR "Dummy soundcard not found or device busy\n");
834 snd_dummy_unregister_all();
840 static void __exit alsa_card_dummy_exit(void)
842 snd_dummy_unregister_all();
845 module_init(alsa_card_dummy_init)
846 module_exit(alsa_card_dummy_exit)