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1da177e4 LT |
1 | /* |
2 | * Dummy soundcard | |
3 | * Copyright (c) by Jaroslav Kysela <perex@suse.cz> | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify | |
6 | * it under the terms of the GNU General Public License as published by | |
7 | * the Free Software Foundation; either version 2 of the License, or | |
8 | * (at your option) any later version. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, | |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | * GNU General Public License for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License | |
16 | * along with this program; if not, write to the Free Software | |
17 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
18 | * | |
19 | */ | |
20 | ||
21 | #include <sound/driver.h> | |
22 | #include <linux/init.h> | |
23 | #include <linux/jiffies.h> | |
24 | #include <linux/slab.h> | |
25 | #include <linux/time.h> | |
26 | #include <linux/wait.h> | |
27 | #include <linux/moduleparam.h> | |
28 | #include <sound/core.h> | |
29 | #include <sound/control.h> | |
30 | #include <sound/pcm.h> | |
31 | #include <sound/rawmidi.h> | |
32 | #include <sound/initval.h> | |
33 | ||
34 | MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>"); | |
35 | MODULE_DESCRIPTION("Dummy soundcard (/dev/null)"); | |
36 | MODULE_LICENSE("GPL"); | |
37 | MODULE_SUPPORTED_DEVICE("{{ALSA,Dummy soundcard}}"); | |
38 | ||
39 | #define MAX_PCM_DEVICES 4 | |
40 | #define MAX_PCM_SUBSTREAMS 16 | |
41 | #define MAX_MIDI_DEVICES 2 | |
42 | ||
43 | #if 0 /* emu10k1 emulation */ | |
44 | #define MAX_BUFFER_SIZE (128 * 1024) | |
45 | static int emu10k1_playback_constraints(snd_pcm_runtime_t *runtime) | |
46 | { | |
47 | int err; | |
48 | if ((err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS)) < 0) | |
49 | return err; | |
50 | if ((err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 256, UINT_MAX)) < 0) | |
51 | return err; | |
52 | return 0; | |
53 | } | |
54 | #define add_playback_constraints emu10k1_playback_constraints | |
55 | #endif | |
56 | ||
57 | #if 0 /* RME9652 emulation */ | |
58 | #define MAX_BUFFER_SIZE (26 * 64 * 1024) | |
59 | #define USE_FORMATS SNDRV_PCM_FMTBIT_S32_LE | |
60 | #define USE_CHANNELS_MIN 26 | |
61 | #define USE_CHANNELS_MAX 26 | |
62 | #define USE_PERIODS_MIN 2 | |
63 | #define USE_PERIODS_MAX 2 | |
64 | #endif | |
65 | ||
66 | #if 0 /* ICE1712 emulation */ | |
67 | #define MAX_BUFFER_SIZE (256 * 1024) | |
68 | #define USE_FORMATS SNDRV_PCM_FMTBIT_S32_LE | |
69 | #define USE_CHANNELS_MIN 10 | |
70 | #define USE_CHANNELS_MAX 10 | |
71 | #define USE_PERIODS_MIN 1 | |
72 | #define USE_PERIODS_MAX 1024 | |
73 | #endif | |
74 | ||
75 | #if 0 /* UDA1341 emulation */ | |
76 | #define MAX_BUFFER_SIZE (16380) | |
77 | #define USE_FORMATS SNDRV_PCM_FMTBIT_S16_LE | |
78 | #define USE_CHANNELS_MIN 2 | |
79 | #define USE_CHANNELS_MAX 2 | |
80 | #define USE_PERIODS_MIN 2 | |
81 | #define USE_PERIODS_MAX 255 | |
82 | #endif | |
83 | ||
84 | #if 0 /* simple AC97 bridge (intel8x0) with 48kHz AC97 only codec */ | |
85 | #define USE_FORMATS SNDRV_PCM_FMTBIT_S16_LE | |
86 | #define USE_CHANNELS_MIN 2 | |
87 | #define USE_CHANNELS_MAX 2 | |
88 | #define USE_RATE SNDRV_PCM_RATE_48000 | |
89 | #define USE_RATE_MIN 48000 | |
90 | #define USE_RATE_MAX 48000 | |
91 | #endif | |
92 | ||
93 | ||
94 | /* defaults */ | |
95 | #ifndef MAX_BUFFER_SIZE | |
96 | #define MAX_BUFFER_SIZE (64*1024) | |
97 | #endif | |
98 | #ifndef USE_FORMATS | |
99 | #define USE_FORMATS (SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE) | |
100 | #endif | |
101 | #ifndef USE_RATE | |
102 | #define USE_RATE SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_48000 | |
103 | #define USE_RATE_MIN 5500 | |
104 | #define USE_RATE_MAX 48000 | |
105 | #endif | |
106 | #ifndef USE_CHANNELS_MIN | |
107 | #define USE_CHANNELS_MIN 1 | |
108 | #endif | |
109 | #ifndef USE_CHANNELS_MAX | |
110 | #define USE_CHANNELS_MAX 2 | |
111 | #endif | |
112 | #ifndef USE_PERIODS_MIN | |
113 | #define USE_PERIODS_MIN 1 | |
114 | #endif | |
115 | #ifndef USE_PERIODS_MAX | |
116 | #define USE_PERIODS_MAX 1024 | |
117 | #endif | |
118 | #ifndef add_playback_constraints | |
119 | #define add_playback_constraints(x) 0 | |
120 | #endif | |
121 | #ifndef add_capture_constraints | |
122 | #define add_capture_constraints(x) 0 | |
123 | #endif | |
124 | ||
125 | static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-MAX */ | |
126 | static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* ID for this card */ | |
127 | static int enable[SNDRV_CARDS] = {1, [1 ... (SNDRV_CARDS - 1)] = 0}; | |
128 | static int pcm_devs[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 1}; | |
129 | static int pcm_substreams[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 8}; | |
130 | //static int midi_devs[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 2}; | |
131 | ||
132 | module_param_array(index, int, NULL, 0444); | |
133 | MODULE_PARM_DESC(index, "Index value for dummy soundcard."); | |
134 | module_param_array(id, charp, NULL, 0444); | |
135 | MODULE_PARM_DESC(id, "ID string for dummy soundcard."); | |
136 | module_param_array(enable, bool, NULL, 0444); | |
137 | MODULE_PARM_DESC(enable, "Enable this dummy soundcard."); | |
138 | module_param_array(pcm_devs, int, NULL, 0444); | |
139 | MODULE_PARM_DESC(pcm_devs, "PCM devices # (0-4) for dummy driver."); | |
140 | module_param_array(pcm_substreams, int, NULL, 0444); | |
141 | MODULE_PARM_DESC(pcm_substreams, "PCM substreams # (1-16) for dummy driver."); | |
142 | //module_param_array(midi_devs, int, NULL, 0444); | |
143 | //MODULE_PARM_DESC(midi_devs, "MIDI devices # (0-2) for dummy driver."); | |
144 | ||
145 | #define MIXER_ADDR_MASTER 0 | |
146 | #define MIXER_ADDR_LINE 1 | |
147 | #define MIXER_ADDR_MIC 2 | |
148 | #define MIXER_ADDR_SYNTH 3 | |
149 | #define MIXER_ADDR_CD 4 | |
150 | #define MIXER_ADDR_LAST 4 | |
151 | ||
152 | typedef struct snd_card_dummy { | |
153 | snd_card_t *card; | |
154 | spinlock_t mixer_lock; | |
155 | int mixer_volume[MIXER_ADDR_LAST+1][2]; | |
156 | int capture_source[MIXER_ADDR_LAST+1][2]; | |
157 | } snd_card_dummy_t; | |
158 | ||
159 | typedef struct snd_card_dummy_pcm { | |
160 | snd_card_dummy_t *dummy; | |
161 | spinlock_t lock; | |
162 | struct timer_list timer; | |
163 | unsigned int pcm_size; | |
164 | unsigned int pcm_count; | |
165 | unsigned int pcm_bps; /* bytes per second */ | |
166 | unsigned int pcm_jiffie; /* bytes per one jiffie */ | |
167 | unsigned int pcm_irq_pos; /* IRQ position */ | |
168 | unsigned int pcm_buf_pos; /* position in buffer */ | |
169 | snd_pcm_substream_t *substream; | |
170 | } snd_card_dummy_pcm_t; | |
171 | ||
172 | static snd_card_t *snd_dummy_cards[SNDRV_CARDS] = SNDRV_DEFAULT_PTR; | |
173 | ||
174 | ||
175 | static void snd_card_dummy_pcm_timer_start(snd_pcm_substream_t * substream) | |
176 | { | |
177 | snd_pcm_runtime_t *runtime = substream->runtime; | |
178 | snd_card_dummy_pcm_t *dpcm = runtime->private_data; | |
179 | ||
180 | dpcm->timer.expires = 1 + jiffies; | |
181 | add_timer(&dpcm->timer); | |
182 | } | |
183 | ||
184 | static void snd_card_dummy_pcm_timer_stop(snd_pcm_substream_t * substream) | |
185 | { | |
186 | snd_pcm_runtime_t *runtime = substream->runtime; | |
187 | snd_card_dummy_pcm_t *dpcm = runtime->private_data; | |
188 | ||
189 | del_timer(&dpcm->timer); | |
190 | } | |
191 | ||
192 | static int snd_card_dummy_playback_trigger(snd_pcm_substream_t * substream, | |
193 | int cmd) | |
194 | { | |
195 | if (cmd == SNDRV_PCM_TRIGGER_START) { | |
196 | snd_card_dummy_pcm_timer_start(substream); | |
197 | } else if (cmd == SNDRV_PCM_TRIGGER_STOP) { | |
198 | snd_card_dummy_pcm_timer_stop(substream); | |
199 | } else { | |
200 | return -EINVAL; | |
201 | } | |
202 | return 0; | |
203 | } | |
204 | ||
205 | static int snd_card_dummy_capture_trigger(snd_pcm_substream_t * substream, | |
206 | int cmd) | |
207 | { | |
208 | if (cmd == SNDRV_PCM_TRIGGER_START) { | |
209 | snd_card_dummy_pcm_timer_start(substream); | |
210 | } else if (cmd == SNDRV_PCM_TRIGGER_STOP) { | |
211 | snd_card_dummy_pcm_timer_stop(substream); | |
212 | } else { | |
213 | return -EINVAL; | |
214 | } | |
215 | return 0; | |
216 | } | |
217 | ||
218 | static int snd_card_dummy_pcm_prepare(snd_pcm_substream_t * substream) | |
219 | { | |
220 | snd_pcm_runtime_t *runtime = substream->runtime; | |
221 | snd_card_dummy_pcm_t *dpcm = runtime->private_data; | |
222 | unsigned int bps; | |
223 | ||
224 | bps = runtime->rate * runtime->channels; | |
225 | bps *= snd_pcm_format_width(runtime->format); | |
226 | bps /= 8; | |
227 | if (bps <= 0) | |
228 | return -EINVAL; | |
229 | dpcm->pcm_bps = bps; | |
230 | dpcm->pcm_jiffie = bps / HZ; | |
231 | dpcm->pcm_size = snd_pcm_lib_buffer_bytes(substream); | |
232 | dpcm->pcm_count = snd_pcm_lib_period_bytes(substream); | |
233 | dpcm->pcm_irq_pos = 0; | |
234 | dpcm->pcm_buf_pos = 0; | |
235 | return 0; | |
236 | } | |
237 | ||
238 | static int snd_card_dummy_playback_prepare(snd_pcm_substream_t * substream) | |
239 | { | |
240 | return snd_card_dummy_pcm_prepare(substream); | |
241 | } | |
242 | ||
243 | static int snd_card_dummy_capture_prepare(snd_pcm_substream_t * substream) | |
244 | { | |
245 | return snd_card_dummy_pcm_prepare(substream); | |
246 | } | |
247 | ||
248 | static void snd_card_dummy_pcm_timer_function(unsigned long data) | |
249 | { | |
250 | snd_card_dummy_pcm_t *dpcm = (snd_card_dummy_pcm_t *)data; | |
251 | ||
252 | dpcm->timer.expires = 1 + jiffies; | |
253 | add_timer(&dpcm->timer); | |
254 | spin_lock_irq(&dpcm->lock); | |
255 | dpcm->pcm_irq_pos += dpcm->pcm_jiffie; | |
256 | dpcm->pcm_buf_pos += dpcm->pcm_jiffie; | |
257 | dpcm->pcm_buf_pos %= dpcm->pcm_size; | |
258 | if (dpcm->pcm_irq_pos >= dpcm->pcm_count) { | |
259 | dpcm->pcm_irq_pos %= dpcm->pcm_count; | |
260 | snd_pcm_period_elapsed(dpcm->substream); | |
261 | } | |
262 | spin_unlock_irq(&dpcm->lock); | |
263 | } | |
264 | ||
265 | static snd_pcm_uframes_t snd_card_dummy_playback_pointer(snd_pcm_substream_t * substream) | |
266 | { | |
267 | snd_pcm_runtime_t *runtime = substream->runtime; | |
268 | snd_card_dummy_pcm_t *dpcm = runtime->private_data; | |
269 | ||
270 | return bytes_to_frames(runtime, dpcm->pcm_buf_pos); | |
271 | } | |
272 | ||
273 | static snd_pcm_uframes_t snd_card_dummy_capture_pointer(snd_pcm_substream_t * substream) | |
274 | { | |
275 | snd_pcm_runtime_t *runtime = substream->runtime; | |
276 | snd_card_dummy_pcm_t *dpcm = runtime->private_data; | |
277 | ||
278 | return bytes_to_frames(runtime, dpcm->pcm_buf_pos); | |
279 | } | |
280 | ||
281 | static snd_pcm_hardware_t snd_card_dummy_playback = | |
282 | { | |
283 | .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED | | |
284 | SNDRV_PCM_INFO_MMAP_VALID), | |
285 | .formats = USE_FORMATS, | |
286 | .rates = USE_RATE, | |
287 | .rate_min = USE_RATE_MIN, | |
288 | .rate_max = USE_RATE_MAX, | |
289 | .channels_min = USE_CHANNELS_MIN, | |
290 | .channels_max = USE_CHANNELS_MAX, | |
291 | .buffer_bytes_max = MAX_BUFFER_SIZE, | |
292 | .period_bytes_min = 64, | |
293 | .period_bytes_max = MAX_BUFFER_SIZE, | |
294 | .periods_min = USE_PERIODS_MIN, | |
295 | .periods_max = USE_PERIODS_MAX, | |
296 | .fifo_size = 0, | |
297 | }; | |
298 | ||
299 | static snd_pcm_hardware_t snd_card_dummy_capture = | |
300 | { | |
301 | .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED | | |
302 | SNDRV_PCM_INFO_MMAP_VALID), | |
303 | .formats = USE_FORMATS, | |
304 | .rates = USE_RATE, | |
305 | .rate_min = USE_RATE_MIN, | |
306 | .rate_max = USE_RATE_MAX, | |
307 | .channels_min = USE_CHANNELS_MIN, | |
308 | .channels_max = USE_CHANNELS_MAX, | |
309 | .buffer_bytes_max = MAX_BUFFER_SIZE, | |
310 | .period_bytes_min = 64, | |
311 | .period_bytes_max = MAX_BUFFER_SIZE, | |
312 | .periods_min = USE_PERIODS_MIN, | |
313 | .periods_max = USE_PERIODS_MAX, | |
314 | .fifo_size = 0, | |
315 | }; | |
316 | ||
317 | static void snd_card_dummy_runtime_free(snd_pcm_runtime_t *runtime) | |
318 | { | |
319 | snd_card_dummy_pcm_t *dpcm = runtime->private_data; | |
320 | kfree(dpcm); | |
321 | } | |
322 | ||
323 | static int snd_card_dummy_hw_params(snd_pcm_substream_t * substream, | |
324 | snd_pcm_hw_params_t * hw_params) | |
325 | { | |
326 | return snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params)); | |
327 | } | |
328 | ||
329 | static int snd_card_dummy_hw_free(snd_pcm_substream_t * substream) | |
330 | { | |
331 | return snd_pcm_lib_free_pages(substream); | |
332 | } | |
333 | ||
334 | static int snd_card_dummy_playback_open(snd_pcm_substream_t * substream) | |
335 | { | |
336 | snd_pcm_runtime_t *runtime = substream->runtime; | |
337 | snd_card_dummy_pcm_t *dpcm; | |
338 | int err; | |
339 | ||
340 | dpcm = kcalloc(1, sizeof(*dpcm), GFP_KERNEL); | |
341 | if (dpcm == NULL) | |
342 | return -ENOMEM; | |
343 | init_timer(&dpcm->timer); | |
344 | dpcm->timer.data = (unsigned long) dpcm; | |
345 | dpcm->timer.function = snd_card_dummy_pcm_timer_function; | |
346 | spin_lock_init(&dpcm->lock); | |
347 | dpcm->substream = substream; | |
348 | runtime->private_data = dpcm; | |
349 | runtime->private_free = snd_card_dummy_runtime_free; | |
350 | runtime->hw = snd_card_dummy_playback; | |
351 | if (substream->pcm->device & 1) { | |
352 | runtime->hw.info &= ~SNDRV_PCM_INFO_INTERLEAVED; | |
353 | runtime->hw.info |= SNDRV_PCM_INFO_NONINTERLEAVED; | |
354 | } | |
355 | if (substream->pcm->device & 2) | |
356 | runtime->hw.info &= ~(SNDRV_PCM_INFO_MMAP|SNDRV_PCM_INFO_MMAP_VALID); | |
357 | if ((err = add_playback_constraints(runtime)) < 0) { | |
358 | kfree(dpcm); | |
359 | return err; | |
360 | } | |
361 | ||
362 | return 0; | |
363 | } | |
364 | ||
365 | static int snd_card_dummy_capture_open(snd_pcm_substream_t * substream) | |
366 | { | |
367 | snd_pcm_runtime_t *runtime = substream->runtime; | |
368 | snd_card_dummy_pcm_t *dpcm; | |
369 | int err; | |
370 | ||
371 | dpcm = kcalloc(1, sizeof(*dpcm), GFP_KERNEL); | |
372 | if (dpcm == NULL) | |
373 | return -ENOMEM; | |
374 | init_timer(&dpcm->timer); | |
375 | dpcm->timer.data = (unsigned long) dpcm; | |
376 | dpcm->timer.function = snd_card_dummy_pcm_timer_function; | |
377 | spin_lock_init(&dpcm->lock); | |
378 | dpcm->substream = substream; | |
379 | runtime->private_data = dpcm; | |
380 | runtime->private_free = snd_card_dummy_runtime_free; | |
381 | runtime->hw = snd_card_dummy_capture; | |
382 | if (substream->pcm->device == 1) { | |
383 | runtime->hw.info &= ~SNDRV_PCM_INFO_INTERLEAVED; | |
384 | runtime->hw.info |= SNDRV_PCM_INFO_NONINTERLEAVED; | |
385 | } | |
386 | if (substream->pcm->device & 2) | |
387 | runtime->hw.info &= ~(SNDRV_PCM_INFO_MMAP|SNDRV_PCM_INFO_MMAP_VALID); | |
388 | if ((err = add_capture_constraints(runtime)) < 0) { | |
389 | kfree(dpcm); | |
390 | return err; | |
391 | } | |
392 | ||
393 | return 0; | |
394 | } | |
395 | ||
396 | static int snd_card_dummy_playback_close(snd_pcm_substream_t * substream) | |
397 | { | |
398 | return 0; | |
399 | } | |
400 | ||
401 | static int snd_card_dummy_capture_close(snd_pcm_substream_t * substream) | |
402 | { | |
403 | return 0; | |
404 | } | |
405 | ||
406 | static snd_pcm_ops_t snd_card_dummy_playback_ops = { | |
407 | .open = snd_card_dummy_playback_open, | |
408 | .close = snd_card_dummy_playback_close, | |
409 | .ioctl = snd_pcm_lib_ioctl, | |
410 | .hw_params = snd_card_dummy_hw_params, | |
411 | .hw_free = snd_card_dummy_hw_free, | |
412 | .prepare = snd_card_dummy_playback_prepare, | |
413 | .trigger = snd_card_dummy_playback_trigger, | |
414 | .pointer = snd_card_dummy_playback_pointer, | |
415 | }; | |
416 | ||
417 | static snd_pcm_ops_t snd_card_dummy_capture_ops = { | |
418 | .open = snd_card_dummy_capture_open, | |
419 | .close = snd_card_dummy_capture_close, | |
420 | .ioctl = snd_pcm_lib_ioctl, | |
421 | .hw_params = snd_card_dummy_hw_params, | |
422 | .hw_free = snd_card_dummy_hw_free, | |
423 | .prepare = snd_card_dummy_capture_prepare, | |
424 | .trigger = snd_card_dummy_capture_trigger, | |
425 | .pointer = snd_card_dummy_capture_pointer, | |
426 | }; | |
427 | ||
428 | static int __init snd_card_dummy_pcm(snd_card_dummy_t *dummy, int device, int substreams) | |
429 | { | |
430 | snd_pcm_t *pcm; | |
431 | int err; | |
432 | ||
433 | if ((err = snd_pcm_new(dummy->card, "Dummy PCM", device, substreams, substreams, &pcm)) < 0) | |
434 | return err; | |
435 | snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_card_dummy_playback_ops); | |
436 | snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_card_dummy_capture_ops); | |
437 | pcm->private_data = dummy; | |
438 | pcm->info_flags = 0; | |
439 | strcpy(pcm->name, "Dummy PCM"); | |
440 | snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_CONTINUOUS, | |
441 | snd_dma_continuous_data(GFP_KERNEL), | |
442 | 0, 64*1024); | |
443 | return 0; | |
444 | } | |
445 | ||
446 | #define DUMMY_VOLUME(xname, xindex, addr) \ | |
447 | { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \ | |
448 | .info = snd_dummy_volume_info, \ | |
449 | .get = snd_dummy_volume_get, .put = snd_dummy_volume_put, \ | |
450 | .private_value = addr } | |
451 | ||
452 | static int snd_dummy_volume_info(snd_kcontrol_t * kcontrol, snd_ctl_elem_info_t * uinfo) | |
453 | { | |
454 | uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; | |
455 | uinfo->count = 2; | |
456 | uinfo->value.integer.min = -50; | |
457 | uinfo->value.integer.max = 100; | |
458 | return 0; | |
459 | } | |
460 | ||
461 | static int snd_dummy_volume_get(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol) | |
462 | { | |
463 | snd_card_dummy_t *dummy = snd_kcontrol_chip(kcontrol); | |
464 | unsigned long flags; | |
465 | int addr = kcontrol->private_value; | |
466 | ||
467 | spin_lock_irqsave(&dummy->mixer_lock, flags); | |
468 | ucontrol->value.integer.value[0] = dummy->mixer_volume[addr][0]; | |
469 | ucontrol->value.integer.value[1] = dummy->mixer_volume[addr][1]; | |
470 | spin_unlock_irqrestore(&dummy->mixer_lock, flags); | |
471 | return 0; | |
472 | } | |
473 | ||
474 | static int snd_dummy_volume_put(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol) | |
475 | { | |
476 | snd_card_dummy_t *dummy = snd_kcontrol_chip(kcontrol); | |
477 | unsigned long flags; | |
478 | int change, addr = kcontrol->private_value; | |
479 | int left, right; | |
480 | ||
481 | left = ucontrol->value.integer.value[0]; | |
482 | if (left < -50) | |
483 | left = -50; | |
484 | if (left > 100) | |
485 | left = 100; | |
486 | right = ucontrol->value.integer.value[1]; | |
487 | if (right < -50) | |
488 | right = -50; | |
489 | if (right > 100) | |
490 | right = 100; | |
491 | spin_lock_irqsave(&dummy->mixer_lock, flags); | |
492 | change = dummy->mixer_volume[addr][0] != left || | |
493 | dummy->mixer_volume[addr][1] != right; | |
494 | dummy->mixer_volume[addr][0] = left; | |
495 | dummy->mixer_volume[addr][1] = right; | |
496 | spin_unlock_irqrestore(&dummy->mixer_lock, flags); | |
497 | return change; | |
498 | } | |
499 | ||
500 | #define DUMMY_CAPSRC(xname, xindex, addr) \ | |
501 | { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \ | |
502 | .info = snd_dummy_capsrc_info, \ | |
503 | .get = snd_dummy_capsrc_get, .put = snd_dummy_capsrc_put, \ | |
504 | .private_value = addr } | |
505 | ||
506 | static int snd_dummy_capsrc_info(snd_kcontrol_t * kcontrol, snd_ctl_elem_info_t * uinfo) | |
507 | { | |
508 | uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN; | |
509 | uinfo->count = 2; | |
510 | uinfo->value.integer.min = 0; | |
511 | uinfo->value.integer.max = 1; | |
512 | return 0; | |
513 | } | |
514 | ||
515 | static int snd_dummy_capsrc_get(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol) | |
516 | { | |
517 | snd_card_dummy_t *dummy = snd_kcontrol_chip(kcontrol); | |
518 | unsigned long flags; | |
519 | int addr = kcontrol->private_value; | |
520 | ||
521 | spin_lock_irqsave(&dummy->mixer_lock, flags); | |
522 | ucontrol->value.integer.value[0] = dummy->capture_source[addr][0]; | |
523 | ucontrol->value.integer.value[1] = dummy->capture_source[addr][1]; | |
524 | spin_unlock_irqrestore(&dummy->mixer_lock, flags); | |
525 | return 0; | |
526 | } | |
527 | ||
528 | static int snd_dummy_capsrc_put(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol) | |
529 | { | |
530 | snd_card_dummy_t *dummy = snd_kcontrol_chip(kcontrol); | |
531 | unsigned long flags; | |
532 | int change, addr = kcontrol->private_value; | |
533 | int left, right; | |
534 | ||
535 | left = ucontrol->value.integer.value[0] & 1; | |
536 | right = ucontrol->value.integer.value[1] & 1; | |
537 | spin_lock_irqsave(&dummy->mixer_lock, flags); | |
538 | change = dummy->capture_source[addr][0] != left && | |
539 | dummy->capture_source[addr][1] != right; | |
540 | dummy->capture_source[addr][0] = left; | |
541 | dummy->capture_source[addr][1] = right; | |
542 | spin_unlock_irqrestore(&dummy->mixer_lock, flags); | |
543 | return change; | |
544 | } | |
545 | ||
546 | static snd_kcontrol_new_t snd_dummy_controls[] = { | |
547 | DUMMY_VOLUME("Master Volume", 0, MIXER_ADDR_MASTER), | |
548 | DUMMY_CAPSRC("Master Capture Switch", 0, MIXER_ADDR_MASTER), | |
549 | DUMMY_VOLUME("Synth Volume", 0, MIXER_ADDR_SYNTH), | |
550 | DUMMY_CAPSRC("Synth Capture Switch", 0, MIXER_ADDR_MASTER), | |
551 | DUMMY_VOLUME("Line Volume", 0, MIXER_ADDR_LINE), | |
552 | DUMMY_CAPSRC("Line Capture Switch", 0, MIXER_ADDR_MASTER), | |
553 | DUMMY_VOLUME("Mic Volume", 0, MIXER_ADDR_MIC), | |
554 | DUMMY_CAPSRC("Mic Capture Switch", 0, MIXER_ADDR_MASTER), | |
555 | DUMMY_VOLUME("CD Volume", 0, MIXER_ADDR_CD), | |
556 | DUMMY_CAPSRC("CD Capture Switch", 0, MIXER_ADDR_MASTER) | |
557 | }; | |
558 | ||
559 | static int __init snd_card_dummy_new_mixer(snd_card_dummy_t * dummy) | |
560 | { | |
561 | snd_card_t *card = dummy->card; | |
562 | unsigned int idx; | |
563 | int err; | |
564 | ||
565 | snd_assert(dummy != NULL, return -EINVAL); | |
566 | spin_lock_init(&dummy->mixer_lock); | |
567 | strcpy(card->mixername, "Dummy Mixer"); | |
568 | ||
569 | for (idx = 0; idx < ARRAY_SIZE(snd_dummy_controls); idx++) { | |
570 | if ((err = snd_ctl_add(card, snd_ctl_new1(&snd_dummy_controls[idx], dummy))) < 0) | |
571 | return err; | |
572 | } | |
573 | return 0; | |
574 | } | |
575 | ||
576 | static int __init snd_card_dummy_probe(int dev) | |
577 | { | |
578 | snd_card_t *card; | |
579 | struct snd_card_dummy *dummy; | |
580 | int idx, err; | |
581 | ||
582 | if (!enable[dev]) | |
583 | return -ENODEV; | |
584 | card = snd_card_new(index[dev], id[dev], THIS_MODULE, | |
585 | sizeof(struct snd_card_dummy)); | |
586 | if (card == NULL) | |
587 | return -ENOMEM; | |
588 | dummy = (struct snd_card_dummy *)card->private_data; | |
589 | dummy->card = card; | |
590 | for (idx = 0; idx < MAX_PCM_DEVICES && idx < pcm_devs[dev]; idx++) { | |
591 | if (pcm_substreams[dev] < 1) | |
592 | pcm_substreams[dev] = 1; | |
593 | if (pcm_substreams[dev] > MAX_PCM_SUBSTREAMS) | |
594 | pcm_substreams[dev] = MAX_PCM_SUBSTREAMS; | |
595 | if ((err = snd_card_dummy_pcm(dummy, idx, pcm_substreams[dev])) < 0) | |
596 | goto __nodev; | |
597 | } | |
598 | if ((err = snd_card_dummy_new_mixer(dummy)) < 0) | |
599 | goto __nodev; | |
600 | strcpy(card->driver, "Dummy"); | |
601 | strcpy(card->shortname, "Dummy"); | |
602 | sprintf(card->longname, "Dummy %i", dev + 1); | |
16dab54b TI |
603 | |
604 | if ((err = snd_card_set_generic_dev(card)) < 0) | |
605 | goto __nodev; | |
606 | ||
1da177e4 LT |
607 | if ((err = snd_card_register(card)) == 0) { |
608 | snd_dummy_cards[dev] = card; | |
609 | return 0; | |
610 | } | |
611 | __nodev: | |
612 | snd_card_free(card); | |
613 | return err; | |
614 | } | |
615 | ||
616 | static int __init alsa_card_dummy_init(void) | |
617 | { | |
618 | int dev, cards; | |
619 | ||
620 | for (dev = cards = 0; dev < SNDRV_CARDS && enable[dev]; dev++) { | |
621 | if (snd_card_dummy_probe(dev) < 0) { | |
622 | #ifdef MODULE | |
623 | printk(KERN_ERR "Dummy soundcard #%i not found or device busy\n", dev + 1); | |
624 | #endif | |
625 | break; | |
626 | } | |
627 | cards++; | |
628 | } | |
629 | if (!cards) { | |
630 | #ifdef MODULE | |
631 | printk(KERN_ERR "Dummy soundcard not found or device busy\n"); | |
632 | #endif | |
633 | return -ENODEV; | |
634 | } | |
635 | return 0; | |
636 | } | |
637 | ||
638 | static void __exit alsa_card_dummy_exit(void) | |
639 | { | |
640 | int idx; | |
641 | ||
642 | for (idx = 0; idx < SNDRV_CARDS; idx++) | |
643 | snd_card_free(snd_dummy_cards[idx]); | |
644 | } | |
645 | ||
646 | module_init(alsa_card_dummy_init) | |
647 | module_exit(alsa_card_dummy_exit) |