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-rw-r--r--sound/drivers/dummy.c643
1 files changed, 643 insertions, 0 deletions
diff --git a/sound/drivers/dummy.c b/sound/drivers/dummy.c
new file mode 100644
index 000000000000..a61640cf7ae7
--- /dev/null
+++ b/sound/drivers/dummy.c
@@ -0,0 +1,643 @@
1/*
2 * Dummy soundcard
3 * Copyright (c) by Jaroslav Kysela <perex@suse.cz>
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18 *
19 */
20
21#include <sound/driver.h>
22#include <linux/init.h>
23#include <linux/jiffies.h>
24#include <linux/slab.h>
25#include <linux/time.h>
26#include <linux/wait.h>
27#include <linux/moduleparam.h>
28#include <sound/core.h>
29#include <sound/control.h>
30#include <sound/pcm.h>
31#include <sound/rawmidi.h>
32#include <sound/initval.h>
33
34MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>");
35MODULE_DESCRIPTION("Dummy soundcard (/dev/null)");
36MODULE_LICENSE("GPL");
37MODULE_SUPPORTED_DEVICE("{{ALSA,Dummy soundcard}}");
38
39#define MAX_PCM_DEVICES 4
40#define MAX_PCM_SUBSTREAMS 16
41#define MAX_MIDI_DEVICES 2
42
43#if 0 /* emu10k1 emulation */
44#define MAX_BUFFER_SIZE (128 * 1024)
45static int emu10k1_playback_constraints(snd_pcm_runtime_t *runtime)
46{
47 int err;
48 if ((err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
49 return err;
50 if ((err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 256, UINT_MAX)) < 0)
51 return err;
52 return 0;
53}
54#define add_playback_constraints emu10k1_playback_constraints
55#endif
56
57#if 0 /* RME9652 emulation */
58#define MAX_BUFFER_SIZE (26 * 64 * 1024)
59#define USE_FORMATS SNDRV_PCM_FMTBIT_S32_LE
60#define USE_CHANNELS_MIN 26
61#define USE_CHANNELS_MAX 26
62#define USE_PERIODS_MIN 2
63#define USE_PERIODS_MAX 2
64#endif
65
66#if 0 /* ICE1712 emulation */
67#define MAX_BUFFER_SIZE (256 * 1024)
68#define USE_FORMATS SNDRV_PCM_FMTBIT_S32_LE
69#define USE_CHANNELS_MIN 10
70#define USE_CHANNELS_MAX 10
71#define USE_PERIODS_MIN 1
72#define USE_PERIODS_MAX 1024
73#endif
74
75#if 0 /* UDA1341 emulation */
76#define MAX_BUFFER_SIZE (16380)
77#define USE_FORMATS SNDRV_PCM_FMTBIT_S16_LE
78#define USE_CHANNELS_MIN 2
79#define USE_CHANNELS_MAX 2
80#define USE_PERIODS_MIN 2
81#define USE_PERIODS_MAX 255
82#endif
83
84#if 0 /* simple AC97 bridge (intel8x0) with 48kHz AC97 only codec */
85#define USE_FORMATS SNDRV_PCM_FMTBIT_S16_LE
86#define USE_CHANNELS_MIN 2
87#define USE_CHANNELS_MAX 2
88#define USE_RATE SNDRV_PCM_RATE_48000
89#define USE_RATE_MIN 48000
90#define USE_RATE_MAX 48000
91#endif
92
93
94/* defaults */
95#ifndef MAX_BUFFER_SIZE
96#define MAX_BUFFER_SIZE (64*1024)
97#endif
98#ifndef USE_FORMATS
99#define USE_FORMATS (SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE)
100#endif
101#ifndef USE_RATE
102#define USE_RATE SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_48000
103#define USE_RATE_MIN 5500
104#define USE_RATE_MAX 48000
105#endif
106#ifndef USE_CHANNELS_MIN
107#define USE_CHANNELS_MIN 1
108#endif
109#ifndef USE_CHANNELS_MAX
110#define USE_CHANNELS_MAX 2
111#endif
112#ifndef USE_PERIODS_MIN
113#define USE_PERIODS_MIN 1
114#endif
115#ifndef USE_PERIODS_MAX
116#define USE_PERIODS_MAX 1024
117#endif
118#ifndef add_playback_constraints
119#define add_playback_constraints(x) 0
120#endif
121#ifndef add_capture_constraints
122#define add_capture_constraints(x) 0
123#endif
124
125static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-MAX */
126static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* ID for this card */
127static int enable[SNDRV_CARDS] = {1, [1 ... (SNDRV_CARDS - 1)] = 0};
128static int pcm_devs[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 1};
129static int pcm_substreams[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 8};
130//static int midi_devs[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 2};
131
132module_param_array(index, int, NULL, 0444);
133MODULE_PARM_DESC(index, "Index value for dummy soundcard.");
134module_param_array(id, charp, NULL, 0444);
135MODULE_PARM_DESC(id, "ID string for dummy soundcard.");
136module_param_array(enable, bool, NULL, 0444);
137MODULE_PARM_DESC(enable, "Enable this dummy soundcard.");
138module_param_array(pcm_devs, int, NULL, 0444);
139MODULE_PARM_DESC(pcm_devs, "PCM devices # (0-4) for dummy driver.");
140module_param_array(pcm_substreams, int, NULL, 0444);
141MODULE_PARM_DESC(pcm_substreams, "PCM substreams # (1-16) for dummy driver.");
142//module_param_array(midi_devs, int, NULL, 0444);
143//MODULE_PARM_DESC(midi_devs, "MIDI devices # (0-2) for dummy driver.");
144
145#define MIXER_ADDR_MASTER 0
146#define MIXER_ADDR_LINE 1
147#define MIXER_ADDR_MIC 2
148#define MIXER_ADDR_SYNTH 3
149#define MIXER_ADDR_CD 4
150#define MIXER_ADDR_LAST 4
151
152typedef struct snd_card_dummy {
153 snd_card_t *card;
154 spinlock_t mixer_lock;
155 int mixer_volume[MIXER_ADDR_LAST+1][2];
156 int capture_source[MIXER_ADDR_LAST+1][2];
157} snd_card_dummy_t;
158
159typedef struct snd_card_dummy_pcm {
160 snd_card_dummy_t *dummy;
161 spinlock_t lock;
162 struct timer_list timer;
163 unsigned int pcm_size;
164 unsigned int pcm_count;
165 unsigned int pcm_bps; /* bytes per second */
166 unsigned int pcm_jiffie; /* bytes per one jiffie */
167 unsigned int pcm_irq_pos; /* IRQ position */
168 unsigned int pcm_buf_pos; /* position in buffer */
169 snd_pcm_substream_t *substream;
170} snd_card_dummy_pcm_t;
171
172static snd_card_t *snd_dummy_cards[SNDRV_CARDS] = SNDRV_DEFAULT_PTR;
173
174
175static void snd_card_dummy_pcm_timer_start(snd_pcm_substream_t * substream)
176{
177 snd_pcm_runtime_t *runtime = substream->runtime;
178 snd_card_dummy_pcm_t *dpcm = runtime->private_data;
179
180 dpcm->timer.expires = 1 + jiffies;
181 add_timer(&dpcm->timer);
182}
183
184static void snd_card_dummy_pcm_timer_stop(snd_pcm_substream_t * substream)
185{
186 snd_pcm_runtime_t *runtime = substream->runtime;
187 snd_card_dummy_pcm_t *dpcm = runtime->private_data;
188
189 del_timer(&dpcm->timer);
190}
191
192static int snd_card_dummy_playback_trigger(snd_pcm_substream_t * substream,
193 int cmd)
194{
195 if (cmd == SNDRV_PCM_TRIGGER_START) {
196 snd_card_dummy_pcm_timer_start(substream);
197 } else if (cmd == SNDRV_PCM_TRIGGER_STOP) {
198 snd_card_dummy_pcm_timer_stop(substream);
199 } else {
200 return -EINVAL;
201 }
202 return 0;
203}
204
205static int snd_card_dummy_capture_trigger(snd_pcm_substream_t * substream,
206 int cmd)
207{
208 if (cmd == SNDRV_PCM_TRIGGER_START) {
209 snd_card_dummy_pcm_timer_start(substream);
210 } else if (cmd == SNDRV_PCM_TRIGGER_STOP) {
211 snd_card_dummy_pcm_timer_stop(substream);
212 } else {
213 return -EINVAL;
214 }
215 return 0;
216}
217
218static int snd_card_dummy_pcm_prepare(snd_pcm_substream_t * substream)
219{
220 snd_pcm_runtime_t *runtime = substream->runtime;
221 snd_card_dummy_pcm_t *dpcm = runtime->private_data;
222 unsigned int bps;
223
224 bps = runtime->rate * runtime->channels;
225 bps *= snd_pcm_format_width(runtime->format);
226 bps /= 8;
227 if (bps <= 0)
228 return -EINVAL;
229 dpcm->pcm_bps = bps;
230 dpcm->pcm_jiffie = bps / HZ;
231 dpcm->pcm_size = snd_pcm_lib_buffer_bytes(substream);
232 dpcm->pcm_count = snd_pcm_lib_period_bytes(substream);
233 dpcm->pcm_irq_pos = 0;
234 dpcm->pcm_buf_pos = 0;
235 return 0;
236}
237
238static int snd_card_dummy_playback_prepare(snd_pcm_substream_t * substream)
239{
240 return snd_card_dummy_pcm_prepare(substream);
241}
242
243static int snd_card_dummy_capture_prepare(snd_pcm_substream_t * substream)
244{
245 return snd_card_dummy_pcm_prepare(substream);
246}
247
248static void snd_card_dummy_pcm_timer_function(unsigned long data)
249{
250 snd_card_dummy_pcm_t *dpcm = (snd_card_dummy_pcm_t *)data;
251
252 dpcm->timer.expires = 1 + jiffies;
253 add_timer(&dpcm->timer);
254 spin_lock_irq(&dpcm->lock);
255 dpcm->pcm_irq_pos += dpcm->pcm_jiffie;
256 dpcm->pcm_buf_pos += dpcm->pcm_jiffie;
257 dpcm->pcm_buf_pos %= dpcm->pcm_size;
258 if (dpcm->pcm_irq_pos >= dpcm->pcm_count) {
259 dpcm->pcm_irq_pos %= dpcm->pcm_count;
260 snd_pcm_period_elapsed(dpcm->substream);
261 }
262 spin_unlock_irq(&dpcm->lock);
263}
264
265static snd_pcm_uframes_t snd_card_dummy_playback_pointer(snd_pcm_substream_t * substream)
266{
267 snd_pcm_runtime_t *runtime = substream->runtime;
268 snd_card_dummy_pcm_t *dpcm = runtime->private_data;
269
270 return bytes_to_frames(runtime, dpcm->pcm_buf_pos);
271}
272
273static snd_pcm_uframes_t snd_card_dummy_capture_pointer(snd_pcm_substream_t * substream)
274{
275 snd_pcm_runtime_t *runtime = substream->runtime;
276 snd_card_dummy_pcm_t *dpcm = runtime->private_data;
277
278 return bytes_to_frames(runtime, dpcm->pcm_buf_pos);
279}
280
281static snd_pcm_hardware_t snd_card_dummy_playback =
282{
283 .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
284 SNDRV_PCM_INFO_MMAP_VALID),
285 .formats = USE_FORMATS,
286 .rates = USE_RATE,
287 .rate_min = USE_RATE_MIN,
288 .rate_max = USE_RATE_MAX,
289 .channels_min = USE_CHANNELS_MIN,
290 .channels_max = USE_CHANNELS_MAX,
291 .buffer_bytes_max = MAX_BUFFER_SIZE,
292 .period_bytes_min = 64,
293 .period_bytes_max = MAX_BUFFER_SIZE,
294 .periods_min = USE_PERIODS_MIN,
295 .periods_max = USE_PERIODS_MAX,
296 .fifo_size = 0,
297};
298
299static snd_pcm_hardware_t snd_card_dummy_capture =
300{
301 .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
302 SNDRV_PCM_INFO_MMAP_VALID),
303 .formats = USE_FORMATS,
304 .rates = USE_RATE,
305 .rate_min = USE_RATE_MIN,
306 .rate_max = USE_RATE_MAX,
307 .channels_min = USE_CHANNELS_MIN,
308 .channels_max = USE_CHANNELS_MAX,
309 .buffer_bytes_max = MAX_BUFFER_SIZE,
310 .period_bytes_min = 64,
311 .period_bytes_max = MAX_BUFFER_SIZE,
312 .periods_min = USE_PERIODS_MIN,
313 .periods_max = USE_PERIODS_MAX,
314 .fifo_size = 0,
315};
316
317static void snd_card_dummy_runtime_free(snd_pcm_runtime_t *runtime)
318{
319 snd_card_dummy_pcm_t *dpcm = runtime->private_data;
320 kfree(dpcm);
321}
322
323static int snd_card_dummy_hw_params(snd_pcm_substream_t * substream,
324 snd_pcm_hw_params_t * hw_params)
325{
326 return snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params));
327}
328
329static int snd_card_dummy_hw_free(snd_pcm_substream_t * substream)
330{
331 return snd_pcm_lib_free_pages(substream);
332}
333
334static int snd_card_dummy_playback_open(snd_pcm_substream_t * substream)
335{
336 snd_pcm_runtime_t *runtime = substream->runtime;
337 snd_card_dummy_pcm_t *dpcm;
338 int err;
339
340 dpcm = kcalloc(1, sizeof(*dpcm), GFP_KERNEL);
341 if (dpcm == NULL)
342 return -ENOMEM;
343 init_timer(&dpcm->timer);
344 dpcm->timer.data = (unsigned long) dpcm;
345 dpcm->timer.function = snd_card_dummy_pcm_timer_function;
346 spin_lock_init(&dpcm->lock);
347 dpcm->substream = substream;
348 runtime->private_data = dpcm;
349 runtime->private_free = snd_card_dummy_runtime_free;
350 runtime->hw = snd_card_dummy_playback;
351 if (substream->pcm->device & 1) {
352 runtime->hw.info &= ~SNDRV_PCM_INFO_INTERLEAVED;
353 runtime->hw.info |= SNDRV_PCM_INFO_NONINTERLEAVED;
354 }
355 if (substream->pcm->device & 2)
356 runtime->hw.info &= ~(SNDRV_PCM_INFO_MMAP|SNDRV_PCM_INFO_MMAP_VALID);
357 if ((err = add_playback_constraints(runtime)) < 0) {
358 kfree(dpcm);
359 return err;
360 }
361
362 return 0;
363}
364
365static int snd_card_dummy_capture_open(snd_pcm_substream_t * substream)
366{
367 snd_pcm_runtime_t *runtime = substream->runtime;
368 snd_card_dummy_pcm_t *dpcm;
369 int err;
370
371 dpcm = kcalloc(1, sizeof(*dpcm), GFP_KERNEL);
372 if (dpcm == NULL)
373 return -ENOMEM;
374 init_timer(&dpcm->timer);
375 dpcm->timer.data = (unsigned long) dpcm;
376 dpcm->timer.function = snd_card_dummy_pcm_timer_function;
377 spin_lock_init(&dpcm->lock);
378 dpcm->substream = substream;
379 runtime->private_data = dpcm;
380 runtime->private_free = snd_card_dummy_runtime_free;
381 runtime->hw = snd_card_dummy_capture;
382 if (substream->pcm->device == 1) {
383 runtime->hw.info &= ~SNDRV_PCM_INFO_INTERLEAVED;
384 runtime->hw.info |= SNDRV_PCM_INFO_NONINTERLEAVED;
385 }
386 if (substream->pcm->device & 2)
387 runtime->hw.info &= ~(SNDRV_PCM_INFO_MMAP|SNDRV_PCM_INFO_MMAP_VALID);
388 if ((err = add_capture_constraints(runtime)) < 0) {
389 kfree(dpcm);
390 return err;
391 }
392
393 return 0;
394}
395
396static int snd_card_dummy_playback_close(snd_pcm_substream_t * substream)
397{
398 return 0;
399}
400
401static int snd_card_dummy_capture_close(snd_pcm_substream_t * substream)
402{
403 return 0;
404}
405
406static snd_pcm_ops_t snd_card_dummy_playback_ops = {
407 .open = snd_card_dummy_playback_open,
408 .close = snd_card_dummy_playback_close,
409 .ioctl = snd_pcm_lib_ioctl,
410 .hw_params = snd_card_dummy_hw_params,
411 .hw_free = snd_card_dummy_hw_free,
412 .prepare = snd_card_dummy_playback_prepare,
413 .trigger = snd_card_dummy_playback_trigger,
414 .pointer = snd_card_dummy_playback_pointer,
415};
416
417static snd_pcm_ops_t snd_card_dummy_capture_ops = {
418 .open = snd_card_dummy_capture_open,
419 .close = snd_card_dummy_capture_close,
420 .ioctl = snd_pcm_lib_ioctl,
421 .hw_params = snd_card_dummy_hw_params,
422 .hw_free = snd_card_dummy_hw_free,
423 .prepare = snd_card_dummy_capture_prepare,
424 .trigger = snd_card_dummy_capture_trigger,
425 .pointer = snd_card_dummy_capture_pointer,
426};
427
428static int __init snd_card_dummy_pcm(snd_card_dummy_t *dummy, int device, int substreams)
429{
430 snd_pcm_t *pcm;
431 int err;
432
433 if ((err = snd_pcm_new(dummy->card, "Dummy PCM", device, substreams, substreams, &pcm)) < 0)
434 return err;
435 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_card_dummy_playback_ops);
436 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_card_dummy_capture_ops);
437 pcm->private_data = dummy;
438 pcm->info_flags = 0;
439 strcpy(pcm->name, "Dummy PCM");
440 snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_CONTINUOUS,
441 snd_dma_continuous_data(GFP_KERNEL),
442 0, 64*1024);
443 return 0;
444}
445
446#define DUMMY_VOLUME(xname, xindex, addr) \
447{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
448 .info = snd_dummy_volume_info, \
449 .get = snd_dummy_volume_get, .put = snd_dummy_volume_put, \
450 .private_value = addr }
451
452static int snd_dummy_volume_info(snd_kcontrol_t * kcontrol, snd_ctl_elem_info_t * uinfo)
453{
454 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
455 uinfo->count = 2;
456 uinfo->value.integer.min = -50;
457 uinfo->value.integer.max = 100;
458 return 0;
459}
460
461static int snd_dummy_volume_get(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
462{
463 snd_card_dummy_t *dummy = snd_kcontrol_chip(kcontrol);
464 unsigned long flags;
465 int addr = kcontrol->private_value;
466
467 spin_lock_irqsave(&dummy->mixer_lock, flags);
468 ucontrol->value.integer.value[0] = dummy->mixer_volume[addr][0];
469 ucontrol->value.integer.value[1] = dummy->mixer_volume[addr][1];
470 spin_unlock_irqrestore(&dummy->mixer_lock, flags);
471 return 0;
472}
473
474static int snd_dummy_volume_put(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
475{
476 snd_card_dummy_t *dummy = snd_kcontrol_chip(kcontrol);
477 unsigned long flags;
478 int change, addr = kcontrol->private_value;
479 int left, right;
480
481 left = ucontrol->value.integer.value[0];
482 if (left < -50)
483 left = -50;
484 if (left > 100)
485 left = 100;
486 right = ucontrol->value.integer.value[1];
487 if (right < -50)
488 right = -50;
489 if (right > 100)
490 right = 100;
491 spin_lock_irqsave(&dummy->mixer_lock, flags);
492 change = dummy->mixer_volume[addr][0] != left ||
493 dummy->mixer_volume[addr][1] != right;
494 dummy->mixer_volume[addr][0] = left;
495 dummy->mixer_volume[addr][1] = right;
496 spin_unlock_irqrestore(&dummy->mixer_lock, flags);
497 return change;
498}
499
500#define DUMMY_CAPSRC(xname, xindex, addr) \
501{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
502 .info = snd_dummy_capsrc_info, \
503 .get = snd_dummy_capsrc_get, .put = snd_dummy_capsrc_put, \
504 .private_value = addr }
505
506static int snd_dummy_capsrc_info(snd_kcontrol_t * kcontrol, snd_ctl_elem_info_t * uinfo)
507{
508 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
509 uinfo->count = 2;
510 uinfo->value.integer.min = 0;
511 uinfo->value.integer.max = 1;
512 return 0;
513}
514
515static int snd_dummy_capsrc_get(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
516{
517 snd_card_dummy_t *dummy = snd_kcontrol_chip(kcontrol);
518 unsigned long flags;
519 int addr = kcontrol->private_value;
520
521 spin_lock_irqsave(&dummy->mixer_lock, flags);
522 ucontrol->value.integer.value[0] = dummy->capture_source[addr][0];
523 ucontrol->value.integer.value[1] = dummy->capture_source[addr][1];
524 spin_unlock_irqrestore(&dummy->mixer_lock, flags);
525 return 0;
526}
527
528static int snd_dummy_capsrc_put(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
529{
530 snd_card_dummy_t *dummy = snd_kcontrol_chip(kcontrol);
531 unsigned long flags;
532 int change, addr = kcontrol->private_value;
533 int left, right;
534
535 left = ucontrol->value.integer.value[0] & 1;
536 right = ucontrol->value.integer.value[1] & 1;
537 spin_lock_irqsave(&dummy->mixer_lock, flags);
538 change = dummy->capture_source[addr][0] != left &&
539 dummy->capture_source[addr][1] != right;
540 dummy->capture_source[addr][0] = left;
541 dummy->capture_source[addr][1] = right;
542 spin_unlock_irqrestore(&dummy->mixer_lock, flags);
543 return change;
544}
545
546static snd_kcontrol_new_t snd_dummy_controls[] = {
547DUMMY_VOLUME("Master Volume", 0, MIXER_ADDR_MASTER),
548DUMMY_CAPSRC("Master Capture Switch", 0, MIXER_ADDR_MASTER),
549DUMMY_VOLUME("Synth Volume", 0, MIXER_ADDR_SYNTH),
550DUMMY_CAPSRC("Synth Capture Switch", 0, MIXER_ADDR_MASTER),
551DUMMY_VOLUME("Line Volume", 0, MIXER_ADDR_LINE),
552DUMMY_CAPSRC("Line Capture Switch", 0, MIXER_ADDR_MASTER),
553DUMMY_VOLUME("Mic Volume", 0, MIXER_ADDR_MIC),
554DUMMY_CAPSRC("Mic Capture Switch", 0, MIXER_ADDR_MASTER),
555DUMMY_VOLUME("CD Volume", 0, MIXER_ADDR_CD),
556DUMMY_CAPSRC("CD Capture Switch", 0, MIXER_ADDR_MASTER)
557};
558
559static int __init snd_card_dummy_new_mixer(snd_card_dummy_t * dummy)
560{
561 snd_card_t *card = dummy->card;
562 unsigned int idx;
563 int err;
564
565 snd_assert(dummy != NULL, return -EINVAL);
566 spin_lock_init(&dummy->mixer_lock);
567 strcpy(card->mixername, "Dummy Mixer");
568
569 for (idx = 0; idx < ARRAY_SIZE(snd_dummy_controls); idx++) {
570 if ((err = snd_ctl_add(card, snd_ctl_new1(&snd_dummy_controls[idx], dummy))) < 0)
571 return err;
572 }
573 return 0;
574}
575
576static int __init snd_card_dummy_probe(int dev)
577{
578 snd_card_t *card;
579 struct snd_card_dummy *dummy;
580 int idx, err;
581
582 if (!enable[dev])
583 return -ENODEV;
584 card = snd_card_new(index[dev], id[dev], THIS_MODULE,
585 sizeof(struct snd_card_dummy));
586 if (card == NULL)
587 return -ENOMEM;
588 dummy = (struct snd_card_dummy *)card->private_data;
589 dummy->card = card;
590 for (idx = 0; idx < MAX_PCM_DEVICES && idx < pcm_devs[dev]; idx++) {
591 if (pcm_substreams[dev] < 1)
592 pcm_substreams[dev] = 1;
593 if (pcm_substreams[dev] > MAX_PCM_SUBSTREAMS)
594 pcm_substreams[dev] = MAX_PCM_SUBSTREAMS;
595 if ((err = snd_card_dummy_pcm(dummy, idx, pcm_substreams[dev])) < 0)
596 goto __nodev;
597 }
598 if ((err = snd_card_dummy_new_mixer(dummy)) < 0)
599 goto __nodev;
600 strcpy(card->driver, "Dummy");
601 strcpy(card->shortname, "Dummy");
602 sprintf(card->longname, "Dummy %i", dev + 1);
603 if ((err = snd_card_register(card)) == 0) {
604 snd_dummy_cards[dev] = card;
605 return 0;
606 }
607 __nodev:
608 snd_card_free(card);
609 return err;
610}
611
612static int __init alsa_card_dummy_init(void)
613{
614 int dev, cards;
615
616 for (dev = cards = 0; dev < SNDRV_CARDS && enable[dev]; dev++) {
617 if (snd_card_dummy_probe(dev) < 0) {
618#ifdef MODULE
619 printk(KERN_ERR "Dummy soundcard #%i not found or device busy\n", dev + 1);
620#endif
621 break;
622 }
623 cards++;
624 }
625 if (!cards) {
626#ifdef MODULE
627 printk(KERN_ERR "Dummy soundcard not found or device busy\n");
628#endif
629 return -ENODEV;
630 }
631 return 0;
632}
633
634static void __exit alsa_card_dummy_exit(void)
635{
636 int idx;
637
638 for (idx = 0; idx < SNDRV_CARDS; idx++)
639 snd_card_free(snd_dummy_cards[idx]);
640}
641
642module_init(alsa_card_dummy_init)
643module_exit(alsa_card_dummy_exit)
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-27 05:40:05 -0500