1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2 | /* |
3 | * Dummy soundcard |
4 | * Copyright (c) by Jaroslav Kysela <perex@perex.cz> |
5 | */ |
6 | |
7 | #include <linux/init.h> |
8 | #include <linux/err.h> |
9 | #include <linux/platform_device.h> |
10 | #include <linux/jiffies.h> |
11 | #include <linux/slab.h> |
12 | #include <linux/time.h> |
13 | #include <linux/wait.h> |
14 | #include <linux/hrtimer.h> |
15 | #include <linux/math64.h> |
16 | #include <linux/module.h> |
17 | #include <sound/core.h> |
18 | #include <sound/control.h> |
19 | #include <sound/tlv.h> |
20 | #include <sound/pcm.h> |
21 | #include <sound/rawmidi.h> |
22 | #include <sound/info.h> |
23 | #include <sound/initval.h> |
24 | |
25 | MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>" ); |
26 | MODULE_DESCRIPTION("Dummy soundcard (/dev/null)" ); |
27 | MODULE_LICENSE("GPL" ); |
28 | |
29 | #define MAX_PCM_DEVICES 4 |
30 | #define MAX_PCM_SUBSTREAMS 128 |
31 | #define MAX_MIDI_DEVICES 2 |
32 | |
33 | /* defaults */ |
34 | #define MAX_BUFFER_SIZE (64*1024) |
35 | #define MIN_PERIOD_SIZE 64 |
36 | #define MAX_PERIOD_SIZE MAX_BUFFER_SIZE |
37 | #define USE_FORMATS (SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE) |
38 | #define USE_RATE SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_48000 |
39 | #define USE_RATE_MIN 5500 |
40 | #define USE_RATE_MAX 48000 |
41 | #define USE_CHANNELS_MIN 1 |
42 | #define USE_CHANNELS_MAX 2 |
43 | #define USE_PERIODS_MIN 1 |
44 | #define USE_PERIODS_MAX 1024 |
45 | #define USE_MIXER_VOLUME_LEVEL_MIN -50 |
46 | #define USE_MIXER_VOLUME_LEVEL_MAX 100 |
47 | |
48 | static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-MAX */ |
49 | static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* ID for this card */ |
50 | static bool enable[SNDRV_CARDS] = {1, [1 ... (SNDRV_CARDS - 1)] = 0}; |
51 | static char *model[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = NULL}; |
52 | static int pcm_devs[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 1}; |
53 | static int pcm_substreams[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 8}; |
54 | //static int midi_devs[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 2}; |
55 | static int mixer_volume_level_min = USE_MIXER_VOLUME_LEVEL_MIN; |
56 | static int mixer_volume_level_max = USE_MIXER_VOLUME_LEVEL_MAX; |
57 | #ifdef CONFIG_HIGH_RES_TIMERS |
58 | static bool hrtimer = 1; |
59 | #endif |
60 | static bool fake_buffer = 1; |
61 | |
62 | module_param_array(index, int, NULL, 0444); |
63 | MODULE_PARM_DESC(index, "Index value for dummy soundcard." ); |
64 | module_param_array(id, charp, NULL, 0444); |
65 | MODULE_PARM_DESC(id, "ID string for dummy soundcard." ); |
66 | module_param_array(enable, bool, NULL, 0444); |
67 | MODULE_PARM_DESC(enable, "Enable this dummy soundcard." ); |
68 | module_param_array(model, charp, NULL, 0444); |
69 | MODULE_PARM_DESC(model, "Soundcard model." ); |
70 | module_param_array(pcm_devs, int, NULL, 0444); |
71 | MODULE_PARM_DESC(pcm_devs, "PCM devices # (0-4) for dummy driver." ); |
72 | module_param_array(pcm_substreams, int, NULL, 0444); |
73 | MODULE_PARM_DESC(pcm_substreams, "PCM substreams # (1-128) for dummy driver." ); |
74 | //module_param_array(midi_devs, int, NULL, 0444); |
75 | //MODULE_PARM_DESC(midi_devs, "MIDI devices # (0-2) for dummy driver."); |
76 | module_param(mixer_volume_level_min, int, 0444); |
77 | MODULE_PARM_DESC(mixer_volume_level_min, "Minimum mixer volume level for dummy driver. Default: -50" ); |
78 | module_param(mixer_volume_level_max, int, 0444); |
79 | MODULE_PARM_DESC(mixer_volume_level_max, "Maximum mixer volume level for dummy driver. Default: 100" ); |
80 | module_param(fake_buffer, bool, 0444); |
81 | MODULE_PARM_DESC(fake_buffer, "Fake buffer allocations." ); |
82 | #ifdef CONFIG_HIGH_RES_TIMERS |
83 | module_param(hrtimer, bool, 0644); |
84 | MODULE_PARM_DESC(hrtimer, "Use hrtimer as the timer source." ); |
85 | #endif |
86 | |
87 | static struct platform_device *devices[SNDRV_CARDS]; |
88 | |
89 | #define MIXER_ADDR_MASTER 0 |
90 | #define MIXER_ADDR_LINE 1 |
91 | #define MIXER_ADDR_MIC 2 |
92 | #define MIXER_ADDR_SYNTH 3 |
93 | #define MIXER_ADDR_CD 4 |
94 | #define MIXER_ADDR_LAST 4 |
95 | |
96 | struct dummy_timer_ops { |
97 | int (*create)(struct snd_pcm_substream *); |
98 | void (*free)(struct snd_pcm_substream *); |
99 | int (*prepare)(struct snd_pcm_substream *); |
100 | int (*start)(struct snd_pcm_substream *); |
101 | int (*stop)(struct snd_pcm_substream *); |
102 | snd_pcm_uframes_t (*pointer)(struct snd_pcm_substream *); |
103 | }; |
104 | |
105 | #define get_dummy_ops(substream) \ |
106 | (*(const struct dummy_timer_ops **)(substream)->runtime->private_data) |
107 | |
108 | struct dummy_model { |
109 | const char *name; |
110 | int (*playback_constraints)(struct snd_pcm_runtime *runtime); |
111 | int (*capture_constraints)(struct snd_pcm_runtime *runtime); |
112 | u64 formats; |
113 | size_t buffer_bytes_max; |
114 | size_t period_bytes_min; |
115 | size_t period_bytes_max; |
116 | unsigned int periods_min; |
117 | unsigned int periods_max; |
118 | unsigned int rates; |
119 | unsigned int rate_min; |
120 | unsigned int rate_max; |
121 | unsigned int channels_min; |
122 | unsigned int channels_max; |
123 | }; |
124 | |
125 | struct snd_dummy { |
126 | struct snd_card *card; |
127 | const struct dummy_model *model; |
128 | struct snd_pcm *pcm; |
129 | struct snd_pcm_hardware pcm_hw; |
130 | spinlock_t mixer_lock; |
131 | int mixer_volume[MIXER_ADDR_LAST+1][2]; |
132 | int capture_source[MIXER_ADDR_LAST+1][2]; |
133 | int iobox; |
134 | struct snd_kcontrol *cd_volume_ctl; |
135 | struct snd_kcontrol *cd_switch_ctl; |
136 | }; |
137 | |
138 | /* |
139 | * card models |
140 | */ |
141 | |
142 | static int emu10k1_playback_constraints(struct snd_pcm_runtime *runtime) |
143 | { |
144 | int err; |
145 | err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS); |
146 | if (err < 0) |
147 | return err; |
148 | err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, min: 256, UINT_MAX); |
149 | if (err < 0) |
150 | return err; |
151 | return 0; |
152 | } |
153 | |
154 | static const struct dummy_model model_emu10k1 = { |
155 | .name = "emu10k1" , |
156 | .playback_constraints = emu10k1_playback_constraints, |
157 | .buffer_bytes_max = 128 * 1024, |
158 | }; |
159 | |
160 | static const struct dummy_model model_rme9652 = { |
161 | .name = "rme9652" , |
162 | .buffer_bytes_max = 26 * 64 * 1024, |
163 | .formats = SNDRV_PCM_FMTBIT_S32_LE, |
164 | .channels_min = 26, |
165 | .channels_max = 26, |
166 | .periods_min = 2, |
167 | .periods_max = 2, |
168 | }; |
169 | |
170 | static const struct dummy_model model_ice1712 = { |
171 | .name = "ice1712" , |
172 | .buffer_bytes_max = 256 * 1024, |
173 | .formats = SNDRV_PCM_FMTBIT_S32_LE, |
174 | .channels_min = 10, |
175 | .channels_max = 10, |
176 | .periods_min = 1, |
177 | .periods_max = 1024, |
178 | }; |
179 | |
180 | static const struct dummy_model model_uda1341 = { |
181 | .name = "uda1341" , |
182 | .buffer_bytes_max = 16380, |
183 | .formats = SNDRV_PCM_FMTBIT_S16_LE, |
184 | .channels_min = 2, |
185 | .channels_max = 2, |
186 | .periods_min = 2, |
187 | .periods_max = 255, |
188 | }; |
189 | |
190 | static const struct dummy_model model_ac97 = { |
191 | .name = "ac97" , |
192 | .formats = SNDRV_PCM_FMTBIT_S16_LE, |
193 | .channels_min = 2, |
194 | .channels_max = 2, |
195 | .rates = SNDRV_PCM_RATE_48000, |
196 | .rate_min = 48000, |
197 | .rate_max = 48000, |
198 | }; |
199 | |
200 | static const struct dummy_model model_ca0106 = { |
201 | .name = "ca0106" , |
202 | .formats = SNDRV_PCM_FMTBIT_S16_LE, |
203 | .buffer_bytes_max = ((65536-64)*8), |
204 | .period_bytes_max = (65536-64), |
205 | .periods_min = 2, |
206 | .periods_max = 8, |
207 | .channels_min = 2, |
208 | .channels_max = 2, |
209 | .rates = SNDRV_PCM_RATE_48000|SNDRV_PCM_RATE_96000|SNDRV_PCM_RATE_192000, |
210 | .rate_min = 48000, |
211 | .rate_max = 192000, |
212 | }; |
213 | |
214 | static const struct dummy_model *dummy_models[] = { |
215 | &model_emu10k1, |
216 | &model_rme9652, |
217 | &model_ice1712, |
218 | &model_uda1341, |
219 | &model_ac97, |
220 | &model_ca0106, |
221 | NULL |
222 | }; |
223 | |
224 | /* |
225 | * system timer interface |
226 | */ |
227 | |
228 | struct dummy_systimer_pcm { |
229 | /* ops must be the first item */ |
230 | const struct dummy_timer_ops *timer_ops; |
231 | spinlock_t lock; |
232 | struct timer_list timer; |
233 | unsigned long base_time; |
234 | unsigned int frac_pos; /* fractional sample position (based HZ) */ |
235 | unsigned int frac_period_rest; |
236 | unsigned int frac_buffer_size; /* buffer_size * HZ */ |
237 | unsigned int frac_period_size; /* period_size * HZ */ |
238 | unsigned int rate; |
239 | int elapsed; |
240 | struct snd_pcm_substream *substream; |
241 | }; |
242 | |
243 | static void dummy_systimer_rearm(struct dummy_systimer_pcm *dpcm) |
244 | { |
245 | mod_timer(timer: &dpcm->timer, expires: jiffies + |
246 | DIV_ROUND_UP(dpcm->frac_period_rest, dpcm->rate)); |
247 | } |
248 | |
249 | static void dummy_systimer_update(struct dummy_systimer_pcm *dpcm) |
250 | { |
251 | unsigned long delta; |
252 | |
253 | delta = jiffies - dpcm->base_time; |
254 | if (!delta) |
255 | return; |
256 | dpcm->base_time += delta; |
257 | delta *= dpcm->rate; |
258 | dpcm->frac_pos += delta; |
259 | while (dpcm->frac_pos >= dpcm->frac_buffer_size) |
260 | dpcm->frac_pos -= dpcm->frac_buffer_size; |
261 | while (dpcm->frac_period_rest <= delta) { |
262 | dpcm->elapsed++; |
263 | dpcm->frac_period_rest += dpcm->frac_period_size; |
264 | } |
265 | dpcm->frac_period_rest -= delta; |
266 | } |
267 | |
268 | static int dummy_systimer_start(struct snd_pcm_substream *substream) |
269 | { |
270 | struct dummy_systimer_pcm *dpcm = substream->runtime->private_data; |
271 | spin_lock(lock: &dpcm->lock); |
272 | dpcm->base_time = jiffies; |
273 | dummy_systimer_rearm(dpcm); |
274 | spin_unlock(lock: &dpcm->lock); |
275 | return 0; |
276 | } |
277 | |
278 | static int dummy_systimer_stop(struct snd_pcm_substream *substream) |
279 | { |
280 | struct dummy_systimer_pcm *dpcm = substream->runtime->private_data; |
281 | spin_lock(lock: &dpcm->lock); |
282 | del_timer(timer: &dpcm->timer); |
283 | spin_unlock(lock: &dpcm->lock); |
284 | return 0; |
285 | } |
286 | |
287 | static int dummy_systimer_prepare(struct snd_pcm_substream *substream) |
288 | { |
289 | struct snd_pcm_runtime *runtime = substream->runtime; |
290 | struct dummy_systimer_pcm *dpcm = runtime->private_data; |
291 | |
292 | dpcm->frac_pos = 0; |
293 | dpcm->rate = runtime->rate; |
294 | dpcm->frac_buffer_size = runtime->buffer_size * HZ; |
295 | dpcm->frac_period_size = runtime->period_size * HZ; |
296 | dpcm->frac_period_rest = dpcm->frac_period_size; |
297 | dpcm->elapsed = 0; |
298 | |
299 | return 0; |
300 | } |
301 | |
302 | static void dummy_systimer_callback(struct timer_list *t) |
303 | { |
304 | struct dummy_systimer_pcm *dpcm = from_timer(dpcm, t, timer); |
305 | unsigned long flags; |
306 | int elapsed = 0; |
307 | |
308 | spin_lock_irqsave(&dpcm->lock, flags); |
309 | dummy_systimer_update(dpcm); |
310 | dummy_systimer_rearm(dpcm); |
311 | elapsed = dpcm->elapsed; |
312 | dpcm->elapsed = 0; |
313 | spin_unlock_irqrestore(lock: &dpcm->lock, flags); |
314 | if (elapsed) |
315 | snd_pcm_period_elapsed(substream: dpcm->substream); |
316 | } |
317 | |
318 | static snd_pcm_uframes_t |
319 | dummy_systimer_pointer(struct snd_pcm_substream *substream) |
320 | { |
321 | struct dummy_systimer_pcm *dpcm = substream->runtime->private_data; |
322 | snd_pcm_uframes_t pos; |
323 | |
324 | spin_lock(lock: &dpcm->lock); |
325 | dummy_systimer_update(dpcm); |
326 | pos = dpcm->frac_pos / HZ; |
327 | spin_unlock(lock: &dpcm->lock); |
328 | return pos; |
329 | } |
330 | |
331 | static int dummy_systimer_create(struct snd_pcm_substream *substream) |
332 | { |
333 | struct dummy_systimer_pcm *dpcm; |
334 | |
335 | dpcm = kzalloc(size: sizeof(*dpcm), GFP_KERNEL); |
336 | if (!dpcm) |
337 | return -ENOMEM; |
338 | substream->runtime->private_data = dpcm; |
339 | timer_setup(&dpcm->timer, dummy_systimer_callback, 0); |
340 | spin_lock_init(&dpcm->lock); |
341 | dpcm->substream = substream; |
342 | return 0; |
343 | } |
344 | |
345 | static void dummy_systimer_free(struct snd_pcm_substream *substream) |
346 | { |
347 | kfree(objp: substream->runtime->private_data); |
348 | } |
349 | |
350 | static const struct dummy_timer_ops dummy_systimer_ops = { |
351 | .create = dummy_systimer_create, |
352 | .free = dummy_systimer_free, |
353 | .prepare = dummy_systimer_prepare, |
354 | .start = dummy_systimer_start, |
355 | .stop = dummy_systimer_stop, |
356 | .pointer = dummy_systimer_pointer, |
357 | }; |
358 | |
359 | #ifdef CONFIG_HIGH_RES_TIMERS |
360 | /* |
361 | * hrtimer interface |
362 | */ |
363 | |
364 | struct dummy_hrtimer_pcm { |
365 | /* ops must be the first item */ |
366 | const struct dummy_timer_ops *timer_ops; |
367 | ktime_t base_time; |
368 | ktime_t period_time; |
369 | atomic_t running; |
370 | struct hrtimer timer; |
371 | struct snd_pcm_substream *substream; |
372 | }; |
373 | |
374 | static enum hrtimer_restart dummy_hrtimer_callback(struct hrtimer *timer) |
375 | { |
376 | struct dummy_hrtimer_pcm *dpcm; |
377 | |
378 | dpcm = container_of(timer, struct dummy_hrtimer_pcm, timer); |
379 | if (!atomic_read(v: &dpcm->running)) |
380 | return HRTIMER_NORESTART; |
381 | /* |
382 | * In cases of XRUN and draining, this calls .trigger to stop PCM |
383 | * substream. |
384 | */ |
385 | snd_pcm_period_elapsed(substream: dpcm->substream); |
386 | if (!atomic_read(v: &dpcm->running)) |
387 | return HRTIMER_NORESTART; |
388 | |
389 | hrtimer_forward_now(timer, interval: dpcm->period_time); |
390 | return HRTIMER_RESTART; |
391 | } |
392 | |
393 | static int dummy_hrtimer_start(struct snd_pcm_substream *substream) |
394 | { |
395 | struct dummy_hrtimer_pcm *dpcm = substream->runtime->private_data; |
396 | |
397 | dpcm->base_time = hrtimer_cb_get_time(timer: &dpcm->timer); |
398 | hrtimer_start(timer: &dpcm->timer, tim: dpcm->period_time, mode: HRTIMER_MODE_REL_SOFT); |
399 | atomic_set(v: &dpcm->running, i: 1); |
400 | return 0; |
401 | } |
402 | |
403 | static int dummy_hrtimer_stop(struct snd_pcm_substream *substream) |
404 | { |
405 | struct dummy_hrtimer_pcm *dpcm = substream->runtime->private_data; |
406 | |
407 | atomic_set(v: &dpcm->running, i: 0); |
408 | if (!hrtimer_callback_running(timer: &dpcm->timer)) |
409 | hrtimer_cancel(timer: &dpcm->timer); |
410 | return 0; |
411 | } |
412 | |
413 | static inline void dummy_hrtimer_sync(struct dummy_hrtimer_pcm *dpcm) |
414 | { |
415 | hrtimer_cancel(timer: &dpcm->timer); |
416 | } |
417 | |
418 | static snd_pcm_uframes_t |
419 | dummy_hrtimer_pointer(struct snd_pcm_substream *substream) |
420 | { |
421 | struct snd_pcm_runtime *runtime = substream->runtime; |
422 | struct dummy_hrtimer_pcm *dpcm = runtime->private_data; |
423 | u64 delta; |
424 | u32 pos; |
425 | |
426 | delta = ktime_us_delta(later: hrtimer_cb_get_time(timer: &dpcm->timer), |
427 | earlier: dpcm->base_time); |
428 | delta = div_u64(dividend: delta * runtime->rate + 999999, divisor: 1000000); |
429 | div_u64_rem(dividend: delta, divisor: runtime->buffer_size, remainder: &pos); |
430 | return pos; |
431 | } |
432 | |
433 | static int dummy_hrtimer_prepare(struct snd_pcm_substream *substream) |
434 | { |
435 | struct snd_pcm_runtime *runtime = substream->runtime; |
436 | struct dummy_hrtimer_pcm *dpcm = runtime->private_data; |
437 | unsigned int period, rate; |
438 | long sec; |
439 | unsigned long nsecs; |
440 | |
441 | dummy_hrtimer_sync(dpcm); |
442 | period = runtime->period_size; |
443 | rate = runtime->rate; |
444 | sec = period / rate; |
445 | period %= rate; |
446 | nsecs = div_u64(dividend: (u64)period * 1000000000UL + rate - 1, divisor: rate); |
447 | dpcm->period_time = ktime_set(secs: sec, nsecs); |
448 | |
449 | return 0; |
450 | } |
451 | |
452 | static int dummy_hrtimer_create(struct snd_pcm_substream *substream) |
453 | { |
454 | struct dummy_hrtimer_pcm *dpcm; |
455 | |
456 | dpcm = kzalloc(size: sizeof(*dpcm), GFP_KERNEL); |
457 | if (!dpcm) |
458 | return -ENOMEM; |
459 | substream->runtime->private_data = dpcm; |
460 | hrtimer_init(timer: &dpcm->timer, CLOCK_MONOTONIC, mode: HRTIMER_MODE_REL_SOFT); |
461 | dpcm->timer.function = dummy_hrtimer_callback; |
462 | dpcm->substream = substream; |
463 | atomic_set(v: &dpcm->running, i: 0); |
464 | return 0; |
465 | } |
466 | |
467 | static void dummy_hrtimer_free(struct snd_pcm_substream *substream) |
468 | { |
469 | struct dummy_hrtimer_pcm *dpcm = substream->runtime->private_data; |
470 | dummy_hrtimer_sync(dpcm); |
471 | kfree(objp: dpcm); |
472 | } |
473 | |
474 | static const struct dummy_timer_ops dummy_hrtimer_ops = { |
475 | .create = dummy_hrtimer_create, |
476 | .free = dummy_hrtimer_free, |
477 | .prepare = dummy_hrtimer_prepare, |
478 | .start = dummy_hrtimer_start, |
479 | .stop = dummy_hrtimer_stop, |
480 | .pointer = dummy_hrtimer_pointer, |
481 | }; |
482 | |
483 | #endif /* CONFIG_HIGH_RES_TIMERS */ |
484 | |
485 | /* |
486 | * PCM interface |
487 | */ |
488 | |
489 | static int dummy_pcm_trigger(struct snd_pcm_substream *substream, int cmd) |
490 | { |
491 | switch (cmd) { |
492 | case SNDRV_PCM_TRIGGER_START: |
493 | case SNDRV_PCM_TRIGGER_RESUME: |
494 | return get_dummy_ops(substream)->start(substream); |
495 | case SNDRV_PCM_TRIGGER_STOP: |
496 | case SNDRV_PCM_TRIGGER_SUSPEND: |
497 | return get_dummy_ops(substream)->stop(substream); |
498 | } |
499 | return -EINVAL; |
500 | } |
501 | |
502 | static int dummy_pcm_prepare(struct snd_pcm_substream *substream) |
503 | { |
504 | return get_dummy_ops(substream)->prepare(substream); |
505 | } |
506 | |
507 | static snd_pcm_uframes_t dummy_pcm_pointer(struct snd_pcm_substream *substream) |
508 | { |
509 | return get_dummy_ops(substream)->pointer(substream); |
510 | } |
511 | |
512 | static const struct snd_pcm_hardware dummy_pcm_hardware = { |
513 | .info = (SNDRV_PCM_INFO_MMAP | |
514 | SNDRV_PCM_INFO_INTERLEAVED | |
515 | SNDRV_PCM_INFO_RESUME | |
516 | SNDRV_PCM_INFO_MMAP_VALID), |
517 | .formats = USE_FORMATS, |
518 | .rates = USE_RATE, |
519 | .rate_min = USE_RATE_MIN, |
520 | .rate_max = USE_RATE_MAX, |
521 | .channels_min = USE_CHANNELS_MIN, |
522 | .channels_max = USE_CHANNELS_MAX, |
523 | .buffer_bytes_max = MAX_BUFFER_SIZE, |
524 | .period_bytes_min = MIN_PERIOD_SIZE, |
525 | .period_bytes_max = MAX_PERIOD_SIZE, |
526 | .periods_min = USE_PERIODS_MIN, |
527 | .periods_max = USE_PERIODS_MAX, |
528 | .fifo_size = 0, |
529 | }; |
530 | |
531 | static int dummy_pcm_hw_params(struct snd_pcm_substream *substream, |
532 | struct snd_pcm_hw_params *hw_params) |
533 | { |
534 | if (fake_buffer) { |
535 | /* runtime->dma_bytes has to be set manually to allow mmap */ |
536 | substream->runtime->dma_bytes = params_buffer_bytes(p: hw_params); |
537 | return 0; |
538 | } |
539 | return 0; |
540 | } |
541 | |
542 | static int dummy_pcm_open(struct snd_pcm_substream *substream) |
543 | { |
544 | struct snd_dummy *dummy = snd_pcm_substream_chip(substream); |
545 | const struct dummy_model *model = dummy->model; |
546 | struct snd_pcm_runtime *runtime = substream->runtime; |
547 | const struct dummy_timer_ops *ops; |
548 | int err; |
549 | |
550 | ops = &dummy_systimer_ops; |
551 | #ifdef CONFIG_HIGH_RES_TIMERS |
552 | if (hrtimer) |
553 | ops = &dummy_hrtimer_ops; |
554 | #endif |
555 | |
556 | err = ops->create(substream); |
557 | if (err < 0) |
558 | return err; |
559 | get_dummy_ops(substream) = ops; |
560 | |
561 | runtime->hw = dummy->pcm_hw; |
562 | if (substream->pcm->device & 1) { |
563 | runtime->hw.info &= ~SNDRV_PCM_INFO_INTERLEAVED; |
564 | runtime->hw.info |= SNDRV_PCM_INFO_NONINTERLEAVED; |
565 | } |
566 | if (substream->pcm->device & 2) |
567 | runtime->hw.info &= ~(SNDRV_PCM_INFO_MMAP | |
568 | SNDRV_PCM_INFO_MMAP_VALID); |
569 | |
570 | if (model == NULL) |
571 | return 0; |
572 | |
573 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { |
574 | if (model->playback_constraints) |
575 | err = model->playback_constraints(substream->runtime); |
576 | } else { |
577 | if (model->capture_constraints) |
578 | err = model->capture_constraints(substream->runtime); |
579 | } |
580 | if (err < 0) { |
581 | get_dummy_ops(substream)->free(substream); |
582 | return err; |
583 | } |
584 | return 0; |
585 | } |
586 | |
587 | static int dummy_pcm_close(struct snd_pcm_substream *substream) |
588 | { |
589 | get_dummy_ops(substream)->free(substream); |
590 | return 0; |
591 | } |
592 | |
593 | /* |
594 | * dummy buffer handling |
595 | */ |
596 | |
597 | static void *dummy_page[2]; |
598 | |
599 | static void free_fake_buffer(void) |
600 | { |
601 | if (fake_buffer) { |
602 | int i; |
603 | for (i = 0; i < 2; i++) |
604 | if (dummy_page[i]) { |
605 | free_page((unsigned long)dummy_page[i]); |
606 | dummy_page[i] = NULL; |
607 | } |
608 | } |
609 | } |
610 | |
611 | static int alloc_fake_buffer(void) |
612 | { |
613 | int i; |
614 | |
615 | if (!fake_buffer) |
616 | return 0; |
617 | for (i = 0; i < 2; i++) { |
618 | dummy_page[i] = (void *)get_zeroed_page(GFP_KERNEL); |
619 | if (!dummy_page[i]) { |
620 | free_fake_buffer(); |
621 | return -ENOMEM; |
622 | } |
623 | } |
624 | return 0; |
625 | } |
626 | |
627 | static int dummy_pcm_copy(struct snd_pcm_substream *substream, |
628 | int channel, unsigned long pos, |
629 | struct iov_iter *iter, unsigned long bytes) |
630 | { |
631 | return 0; /* do nothing */ |
632 | } |
633 | |
634 | static int dummy_pcm_silence(struct snd_pcm_substream *substream, |
635 | int channel, unsigned long pos, |
636 | unsigned long bytes) |
637 | { |
638 | return 0; /* do nothing */ |
639 | } |
640 | |
641 | static struct page *dummy_pcm_page(struct snd_pcm_substream *substream, |
642 | unsigned long offset) |
643 | { |
644 | return virt_to_page(dummy_page[substream->stream]); /* the same page */ |
645 | } |
646 | |
647 | static const struct snd_pcm_ops dummy_pcm_ops = { |
648 | .open = dummy_pcm_open, |
649 | .close = dummy_pcm_close, |
650 | .hw_params = dummy_pcm_hw_params, |
651 | .prepare = dummy_pcm_prepare, |
652 | .trigger = dummy_pcm_trigger, |
653 | .pointer = dummy_pcm_pointer, |
654 | }; |
655 | |
656 | static const struct snd_pcm_ops dummy_pcm_ops_no_buf = { |
657 | .open = dummy_pcm_open, |
658 | .close = dummy_pcm_close, |
659 | .hw_params = dummy_pcm_hw_params, |
660 | .prepare = dummy_pcm_prepare, |
661 | .trigger = dummy_pcm_trigger, |
662 | .pointer = dummy_pcm_pointer, |
663 | .copy = dummy_pcm_copy, |
664 | .fill_silence = dummy_pcm_silence, |
665 | .page = dummy_pcm_page, |
666 | }; |
667 | |
668 | static int snd_card_dummy_pcm(struct snd_dummy *dummy, int device, |
669 | int substreams) |
670 | { |
671 | struct snd_pcm *pcm; |
672 | const struct snd_pcm_ops *ops; |
673 | int err; |
674 | |
675 | err = snd_pcm_new(card: dummy->card, id: "Dummy PCM" , device, |
676 | playback_count: substreams, capture_count: substreams, rpcm: &pcm); |
677 | if (err < 0) |
678 | return err; |
679 | dummy->pcm = pcm; |
680 | if (fake_buffer) |
681 | ops = &dummy_pcm_ops_no_buf; |
682 | else |
683 | ops = &dummy_pcm_ops; |
684 | snd_pcm_set_ops(pcm, direction: SNDRV_PCM_STREAM_PLAYBACK, ops); |
685 | snd_pcm_set_ops(pcm, direction: SNDRV_PCM_STREAM_CAPTURE, ops); |
686 | pcm->private_data = dummy; |
687 | pcm->info_flags = 0; |
688 | strcpy(p: pcm->name, q: "Dummy PCM" ); |
689 | if (!fake_buffer) { |
690 | snd_pcm_set_managed_buffer_all(pcm, |
691 | SNDRV_DMA_TYPE_CONTINUOUS, |
692 | NULL, |
693 | size: 0, max: 64*1024); |
694 | } |
695 | return 0; |
696 | } |
697 | |
698 | /* |
699 | * mixer interface |
700 | */ |
701 | |
702 | #define DUMMY_VOLUME(xname, xindex, addr) \ |
703 | { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, \ |
704 | .access = SNDRV_CTL_ELEM_ACCESS_READWRITE | SNDRV_CTL_ELEM_ACCESS_TLV_READ, \ |
705 | .name = xname, .index = xindex, \ |
706 | .info = snd_dummy_volume_info, \ |
707 | .get = snd_dummy_volume_get, .put = snd_dummy_volume_put, \ |
708 | .private_value = addr, \ |
709 | .tlv = { .p = db_scale_dummy } } |
710 | |
711 | static int snd_dummy_volume_info(struct snd_kcontrol *kcontrol, |
712 | struct snd_ctl_elem_info *uinfo) |
713 | { |
714 | uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; |
715 | uinfo->count = 2; |
716 | uinfo->value.integer.min = mixer_volume_level_min; |
717 | uinfo->value.integer.max = mixer_volume_level_max; |
718 | return 0; |
719 | } |
720 | |
721 | static int snd_dummy_volume_get(struct snd_kcontrol *kcontrol, |
722 | struct snd_ctl_elem_value *ucontrol) |
723 | { |
724 | struct snd_dummy *dummy = snd_kcontrol_chip(kcontrol); |
725 | int addr = kcontrol->private_value; |
726 | |
727 | spin_lock_irq(lock: &dummy->mixer_lock); |
728 | ucontrol->value.integer.value[0] = dummy->mixer_volume[addr][0]; |
729 | ucontrol->value.integer.value[1] = dummy->mixer_volume[addr][1]; |
730 | spin_unlock_irq(lock: &dummy->mixer_lock); |
731 | return 0; |
732 | } |
733 | |
734 | static int snd_dummy_volume_put(struct snd_kcontrol *kcontrol, |
735 | struct snd_ctl_elem_value *ucontrol) |
736 | { |
737 | struct snd_dummy *dummy = snd_kcontrol_chip(kcontrol); |
738 | int change, addr = kcontrol->private_value; |
739 | int left, right; |
740 | |
741 | left = ucontrol->value.integer.value[0]; |
742 | if (left < mixer_volume_level_min) |
743 | left = mixer_volume_level_min; |
744 | if (left > mixer_volume_level_max) |
745 | left = mixer_volume_level_max; |
746 | right = ucontrol->value.integer.value[1]; |
747 | if (right < mixer_volume_level_min) |
748 | right = mixer_volume_level_min; |
749 | if (right > mixer_volume_level_max) |
750 | right = mixer_volume_level_max; |
751 | spin_lock_irq(lock: &dummy->mixer_lock); |
752 | change = dummy->mixer_volume[addr][0] != left || |
753 | dummy->mixer_volume[addr][1] != right; |
754 | dummy->mixer_volume[addr][0] = left; |
755 | dummy->mixer_volume[addr][1] = right; |
756 | spin_unlock_irq(lock: &dummy->mixer_lock); |
757 | return change; |
758 | } |
759 | |
760 | static const DECLARE_TLV_DB_SCALE(db_scale_dummy, -4500, 30, 0); |
761 | |
762 | #define DUMMY_CAPSRC(xname, xindex, addr) \ |
763 | { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \ |
764 | .info = snd_dummy_capsrc_info, \ |
765 | .get = snd_dummy_capsrc_get, .put = snd_dummy_capsrc_put, \ |
766 | .private_value = addr } |
767 | |
768 | #define snd_dummy_capsrc_info snd_ctl_boolean_stereo_info |
769 | |
770 | static int snd_dummy_capsrc_get(struct snd_kcontrol *kcontrol, |
771 | struct snd_ctl_elem_value *ucontrol) |
772 | { |
773 | struct snd_dummy *dummy = snd_kcontrol_chip(kcontrol); |
774 | int addr = kcontrol->private_value; |
775 | |
776 | spin_lock_irq(lock: &dummy->mixer_lock); |
777 | ucontrol->value.integer.value[0] = dummy->capture_source[addr][0]; |
778 | ucontrol->value.integer.value[1] = dummy->capture_source[addr][1]; |
779 | spin_unlock_irq(lock: &dummy->mixer_lock); |
780 | return 0; |
781 | } |
782 | |
783 | static int snd_dummy_capsrc_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) |
784 | { |
785 | struct snd_dummy *dummy = snd_kcontrol_chip(kcontrol); |
786 | int change, addr = kcontrol->private_value; |
787 | int left, right; |
788 | |
789 | left = ucontrol->value.integer.value[0] & 1; |
790 | right = ucontrol->value.integer.value[1] & 1; |
791 | spin_lock_irq(lock: &dummy->mixer_lock); |
792 | change = dummy->capture_source[addr][0] != left && |
793 | dummy->capture_source[addr][1] != right; |
794 | dummy->capture_source[addr][0] = left; |
795 | dummy->capture_source[addr][1] = right; |
796 | spin_unlock_irq(lock: &dummy->mixer_lock); |
797 | return change; |
798 | } |
799 | |
800 | static int snd_dummy_iobox_info(struct snd_kcontrol *kcontrol, |
801 | struct snd_ctl_elem_info *info) |
802 | { |
803 | static const char *const names[] = { "None" , "CD Player" }; |
804 | |
805 | return snd_ctl_enum_info(info, channels: 1, items: 2, names); |
806 | } |
807 | |
808 | static int snd_dummy_iobox_get(struct snd_kcontrol *kcontrol, |
809 | struct snd_ctl_elem_value *value) |
810 | { |
811 | struct snd_dummy *dummy = snd_kcontrol_chip(kcontrol); |
812 | |
813 | value->value.enumerated.item[0] = dummy->iobox; |
814 | return 0; |
815 | } |
816 | |
817 | static int snd_dummy_iobox_put(struct snd_kcontrol *kcontrol, |
818 | struct snd_ctl_elem_value *value) |
819 | { |
820 | struct snd_dummy *dummy = snd_kcontrol_chip(kcontrol); |
821 | int changed; |
822 | |
823 | if (value->value.enumerated.item[0] > 1) |
824 | return -EINVAL; |
825 | |
826 | changed = value->value.enumerated.item[0] != dummy->iobox; |
827 | if (changed) { |
828 | dummy->iobox = value->value.enumerated.item[0]; |
829 | |
830 | if (dummy->iobox) { |
831 | dummy->cd_volume_ctl->vd[0].access &= |
832 | ~SNDRV_CTL_ELEM_ACCESS_INACTIVE; |
833 | dummy->cd_switch_ctl->vd[0].access &= |
834 | ~SNDRV_CTL_ELEM_ACCESS_INACTIVE; |
835 | } else { |
836 | dummy->cd_volume_ctl->vd[0].access |= |
837 | SNDRV_CTL_ELEM_ACCESS_INACTIVE; |
838 | dummy->cd_switch_ctl->vd[0].access |= |
839 | SNDRV_CTL_ELEM_ACCESS_INACTIVE; |
840 | } |
841 | |
842 | snd_ctl_notify(card: dummy->card, SNDRV_CTL_EVENT_MASK_INFO, |
843 | id: &dummy->cd_volume_ctl->id); |
844 | snd_ctl_notify(card: dummy->card, SNDRV_CTL_EVENT_MASK_INFO, |
845 | id: &dummy->cd_switch_ctl->id); |
846 | } |
847 | |
848 | return changed; |
849 | } |
850 | |
851 | static const struct snd_kcontrol_new snd_dummy_controls[] = { |
852 | DUMMY_VOLUME("Master Volume" , 0, MIXER_ADDR_MASTER), |
853 | DUMMY_CAPSRC("Master Capture Switch" , 0, MIXER_ADDR_MASTER), |
854 | DUMMY_VOLUME("Synth Volume" , 0, MIXER_ADDR_SYNTH), |
855 | DUMMY_CAPSRC("Synth Capture Switch" , 0, MIXER_ADDR_SYNTH), |
856 | DUMMY_VOLUME("Line Volume" , 0, MIXER_ADDR_LINE), |
857 | DUMMY_CAPSRC("Line Capture Switch" , 0, MIXER_ADDR_LINE), |
858 | DUMMY_VOLUME("Mic Volume" , 0, MIXER_ADDR_MIC), |
859 | DUMMY_CAPSRC("Mic Capture Switch" , 0, MIXER_ADDR_MIC), |
860 | DUMMY_VOLUME("CD Volume" , 0, MIXER_ADDR_CD), |
861 | DUMMY_CAPSRC("CD Capture Switch" , 0, MIXER_ADDR_CD), |
862 | { |
863 | .iface = SNDRV_CTL_ELEM_IFACE_MIXER, |
864 | .name = "External I/O Box" , |
865 | .info = snd_dummy_iobox_info, |
866 | .get = snd_dummy_iobox_get, |
867 | .put = snd_dummy_iobox_put, |
868 | }, |
869 | }; |
870 | |
871 | static int snd_card_dummy_new_mixer(struct snd_dummy *dummy) |
872 | { |
873 | struct snd_card *card = dummy->card; |
874 | struct snd_kcontrol *kcontrol; |
875 | unsigned int idx; |
876 | int err; |
877 | |
878 | spin_lock_init(&dummy->mixer_lock); |
879 | strcpy(p: card->mixername, q: "Dummy Mixer" ); |
880 | dummy->iobox = 1; |
881 | |
882 | for (idx = 0; idx < ARRAY_SIZE(snd_dummy_controls); idx++) { |
883 | kcontrol = snd_ctl_new1(kcontrolnew: &snd_dummy_controls[idx], private_data: dummy); |
884 | err = snd_ctl_add(card, kcontrol); |
885 | if (err < 0) |
886 | return err; |
887 | if (!strcmp(kcontrol->id.name, "CD Volume" )) |
888 | dummy->cd_volume_ctl = kcontrol; |
889 | else if (!strcmp(kcontrol->id.name, "CD Capture Switch" )) |
890 | dummy->cd_switch_ctl = kcontrol; |
891 | |
892 | } |
893 | return 0; |
894 | } |
895 | |
896 | #if defined(CONFIG_SND_DEBUG) && defined(CONFIG_SND_PROC_FS) |
897 | /* |
898 | * proc interface |
899 | */ |
900 | static void print_formats(struct snd_dummy *dummy, |
901 | struct snd_info_buffer *buffer) |
902 | { |
903 | snd_pcm_format_t i; |
904 | |
905 | pcm_for_each_format(i) { |
906 | if (dummy->pcm_hw.formats & pcm_format_to_bits(pcm_format: i)) |
907 | snd_iprintf(buffer, " %s" , snd_pcm_format_name(i)); |
908 | } |
909 | } |
910 | |
911 | static void print_rates(struct snd_dummy *dummy, |
912 | struct snd_info_buffer *buffer) |
913 | { |
914 | static const int rates[] = { |
915 | 5512, 8000, 11025, 16000, 22050, 32000, 44100, 48000, |
916 | 64000, 88200, 96000, 176400, 192000, |
917 | }; |
918 | int i; |
919 | |
920 | if (dummy->pcm_hw.rates & SNDRV_PCM_RATE_CONTINUOUS) |
921 | snd_iprintf(buffer, " continuous" ); |
922 | if (dummy->pcm_hw.rates & SNDRV_PCM_RATE_KNOT) |
923 | snd_iprintf(buffer, " knot" ); |
924 | for (i = 0; i < ARRAY_SIZE(rates); i++) |
925 | if (dummy->pcm_hw.rates & (1 << i)) |
926 | snd_iprintf(buffer, " %d" , rates[i]); |
927 | } |
928 | |
929 | #define get_dummy_int_ptr(dummy, ofs) \ |
930 | (unsigned int *)((char *)&((dummy)->pcm_hw) + (ofs)) |
931 | #define get_dummy_ll_ptr(dummy, ofs) \ |
932 | (unsigned long long *)((char *)&((dummy)->pcm_hw) + (ofs)) |
933 | |
934 | struct dummy_hw_field { |
935 | const char *name; |
936 | const char *format; |
937 | unsigned int offset; |
938 | unsigned int size; |
939 | }; |
940 | #define FIELD_ENTRY(item, fmt) { \ |
941 | .name = #item, \ |
942 | .format = fmt, \ |
943 | .offset = offsetof(struct snd_pcm_hardware, item), \ |
944 | .size = sizeof(dummy_pcm_hardware.item) } |
945 | |
946 | static const struct dummy_hw_field fields[] = { |
947 | FIELD_ENTRY(formats, "%#llx" ), |
948 | FIELD_ENTRY(rates, "%#x" ), |
949 | FIELD_ENTRY(rate_min, "%d" ), |
950 | FIELD_ENTRY(rate_max, "%d" ), |
951 | FIELD_ENTRY(channels_min, "%d" ), |
952 | FIELD_ENTRY(channels_max, "%d" ), |
953 | FIELD_ENTRY(buffer_bytes_max, "%ld" ), |
954 | FIELD_ENTRY(period_bytes_min, "%ld" ), |
955 | FIELD_ENTRY(period_bytes_max, "%ld" ), |
956 | FIELD_ENTRY(periods_min, "%d" ), |
957 | FIELD_ENTRY(periods_max, "%d" ), |
958 | }; |
959 | |
960 | static void dummy_proc_read(struct snd_info_entry *entry, |
961 | struct snd_info_buffer *buffer) |
962 | { |
963 | struct snd_dummy *dummy = entry->private_data; |
964 | int i; |
965 | |
966 | for (i = 0; i < ARRAY_SIZE(fields); i++) { |
967 | snd_iprintf(buffer, "%s " , fields[i].name); |
968 | if (fields[i].size == sizeof(int)) |
969 | snd_iprintf(buffer, fields[i].format, |
970 | *get_dummy_int_ptr(dummy, fields[i].offset)); |
971 | else |
972 | snd_iprintf(buffer, fields[i].format, |
973 | *get_dummy_ll_ptr(dummy, fields[i].offset)); |
974 | if (!strcmp(fields[i].name, "formats" )) |
975 | print_formats(dummy, buffer); |
976 | else if (!strcmp(fields[i].name, "rates" )) |
977 | print_rates(dummy, buffer); |
978 | snd_iprintf(buffer, "\n" ); |
979 | } |
980 | } |
981 | |
982 | static void dummy_proc_write(struct snd_info_entry *entry, |
983 | struct snd_info_buffer *buffer) |
984 | { |
985 | struct snd_dummy *dummy = entry->private_data; |
986 | char line[64]; |
987 | |
988 | while (!snd_info_get_line(buffer, line, len: sizeof(line))) { |
989 | char item[20]; |
990 | const char *ptr; |
991 | unsigned long long val; |
992 | int i; |
993 | |
994 | ptr = snd_info_get_str(dest: item, src: line, len: sizeof(item)); |
995 | for (i = 0; i < ARRAY_SIZE(fields); i++) { |
996 | if (!strcmp(item, fields[i].name)) |
997 | break; |
998 | } |
999 | if (i >= ARRAY_SIZE(fields)) |
1000 | continue; |
1001 | snd_info_get_str(dest: item, src: ptr, len: sizeof(item)); |
1002 | if (kstrtoull(s: item, base: 0, res: &val)) |
1003 | continue; |
1004 | if (fields[i].size == sizeof(int)) |
1005 | *get_dummy_int_ptr(dummy, fields[i].offset) = val; |
1006 | else |
1007 | *get_dummy_ll_ptr(dummy, fields[i].offset) = val; |
1008 | } |
1009 | } |
1010 | |
1011 | static void dummy_proc_init(struct snd_dummy *chip) |
1012 | { |
1013 | snd_card_rw_proc_new(card: chip->card, name: "dummy_pcm" , private_data: chip, |
1014 | read: dummy_proc_read, write: dummy_proc_write); |
1015 | } |
1016 | #else |
1017 | #define dummy_proc_init(x) |
1018 | #endif /* CONFIG_SND_DEBUG && CONFIG_SND_PROC_FS */ |
1019 | |
1020 | static int snd_dummy_probe(struct platform_device *devptr) |
1021 | { |
1022 | struct snd_card *card; |
1023 | struct snd_dummy *dummy; |
1024 | const struct dummy_model *m = NULL, **mdl; |
1025 | int idx, err; |
1026 | int dev = devptr->id; |
1027 | |
1028 | err = snd_devm_card_new(parent: &devptr->dev, idx: index[dev], xid: id[dev], THIS_MODULE, |
1029 | extra_size: sizeof(struct snd_dummy), card_ret: &card); |
1030 | if (err < 0) |
1031 | return err; |
1032 | dummy = card->private_data; |
1033 | dummy->card = card; |
1034 | for (mdl = dummy_models; *mdl && model[dev]; mdl++) { |
1035 | if (strcmp(model[dev], (*mdl)->name) == 0) { |
1036 | printk(KERN_INFO |
1037 | "snd-dummy: Using model '%s' for card %i\n" , |
1038 | (*mdl)->name, card->number); |
1039 | m = dummy->model = *mdl; |
1040 | break; |
1041 | } |
1042 | } |
1043 | for (idx = 0; idx < MAX_PCM_DEVICES && idx < pcm_devs[dev]; idx++) { |
1044 | if (pcm_substreams[dev] < 1) |
1045 | pcm_substreams[dev] = 1; |
1046 | if (pcm_substreams[dev] > MAX_PCM_SUBSTREAMS) |
1047 | pcm_substreams[dev] = MAX_PCM_SUBSTREAMS; |
1048 | err = snd_card_dummy_pcm(dummy, device: idx, substreams: pcm_substreams[dev]); |
1049 | if (err < 0) |
1050 | return err; |
1051 | } |
1052 | |
1053 | dummy->pcm_hw = dummy_pcm_hardware; |
1054 | if (m) { |
1055 | if (m->formats) |
1056 | dummy->pcm_hw.formats = m->formats; |
1057 | if (m->buffer_bytes_max) |
1058 | dummy->pcm_hw.buffer_bytes_max = m->buffer_bytes_max; |
1059 | if (m->period_bytes_min) |
1060 | dummy->pcm_hw.period_bytes_min = m->period_bytes_min; |
1061 | if (m->period_bytes_max) |
1062 | dummy->pcm_hw.period_bytes_max = m->period_bytes_max; |
1063 | if (m->periods_min) |
1064 | dummy->pcm_hw.periods_min = m->periods_min; |
1065 | if (m->periods_max) |
1066 | dummy->pcm_hw.periods_max = m->periods_max; |
1067 | if (m->rates) |
1068 | dummy->pcm_hw.rates = m->rates; |
1069 | if (m->rate_min) |
1070 | dummy->pcm_hw.rate_min = m->rate_min; |
1071 | if (m->rate_max) |
1072 | dummy->pcm_hw.rate_max = m->rate_max; |
1073 | if (m->channels_min) |
1074 | dummy->pcm_hw.channels_min = m->channels_min; |
1075 | if (m->channels_max) |
1076 | dummy->pcm_hw.channels_max = m->channels_max; |
1077 | } |
1078 | |
1079 | if (mixer_volume_level_min > mixer_volume_level_max) { |
1080 | pr_warn("snd-dummy: Invalid mixer volume level: min=%d, max=%d. Fall back to default value.\n" , |
1081 | mixer_volume_level_min, mixer_volume_level_max); |
1082 | mixer_volume_level_min = USE_MIXER_VOLUME_LEVEL_MIN; |
1083 | mixer_volume_level_max = USE_MIXER_VOLUME_LEVEL_MAX; |
1084 | } |
1085 | err = snd_card_dummy_new_mixer(dummy); |
1086 | if (err < 0) |
1087 | return err; |
1088 | strcpy(p: card->driver, q: "Dummy" ); |
1089 | strcpy(p: card->shortname, q: "Dummy" ); |
1090 | sprintf(buf: card->longname, fmt: "Dummy %i" , dev + 1); |
1091 | |
1092 | dummy_proc_init(chip: dummy); |
1093 | |
1094 | err = snd_card_register(card); |
1095 | if (err < 0) |
1096 | return err; |
1097 | platform_set_drvdata(pdev: devptr, data: card); |
1098 | return 0; |
1099 | } |
1100 | |
1101 | #ifdef CONFIG_PM_SLEEP |
1102 | static int snd_dummy_suspend(struct device *pdev) |
1103 | { |
1104 | struct snd_card *card = dev_get_drvdata(dev: pdev); |
1105 | |
1106 | snd_power_change_state(card, SNDRV_CTL_POWER_D3hot); |
1107 | return 0; |
1108 | } |
1109 | |
1110 | static int snd_dummy_resume(struct device *pdev) |
1111 | { |
1112 | struct snd_card *card = dev_get_drvdata(dev: pdev); |
1113 | |
1114 | snd_power_change_state(card, SNDRV_CTL_POWER_D0); |
1115 | return 0; |
1116 | } |
1117 | |
1118 | static SIMPLE_DEV_PM_OPS(snd_dummy_pm, snd_dummy_suspend, snd_dummy_resume); |
1119 | #define SND_DUMMY_PM_OPS &snd_dummy_pm |
1120 | #else |
1121 | #define SND_DUMMY_PM_OPS NULL |
1122 | #endif |
1123 | |
1124 | #define SND_DUMMY_DRIVER "snd_dummy" |
1125 | |
1126 | static struct platform_driver snd_dummy_driver = { |
1127 | .probe = snd_dummy_probe, |
1128 | .driver = { |
1129 | .name = SND_DUMMY_DRIVER, |
1130 | .pm = SND_DUMMY_PM_OPS, |
1131 | }, |
1132 | }; |
1133 | |
1134 | static void snd_dummy_unregister_all(void) |
1135 | { |
1136 | int i; |
1137 | |
1138 | for (i = 0; i < ARRAY_SIZE(devices); ++i) |
1139 | platform_device_unregister(devices[i]); |
1140 | platform_driver_unregister(&snd_dummy_driver); |
1141 | free_fake_buffer(); |
1142 | } |
1143 | |
1144 | static int __init alsa_card_dummy_init(void) |
1145 | { |
1146 | int i, cards, err; |
1147 | |
1148 | err = platform_driver_register(&snd_dummy_driver); |
1149 | if (err < 0) |
1150 | return err; |
1151 | |
1152 | err = alloc_fake_buffer(); |
1153 | if (err < 0) { |
1154 | platform_driver_unregister(&snd_dummy_driver); |
1155 | return err; |
1156 | } |
1157 | |
1158 | cards = 0; |
1159 | for (i = 0; i < SNDRV_CARDS; i++) { |
1160 | struct platform_device *device; |
1161 | if (! enable[i]) |
1162 | continue; |
1163 | device = platform_device_register_simple(SND_DUMMY_DRIVER, |
1164 | id: i, NULL, num: 0); |
1165 | if (IS_ERR(ptr: device)) |
1166 | continue; |
1167 | if (!platform_get_drvdata(pdev: device)) { |
1168 | platform_device_unregister(device); |
1169 | continue; |
1170 | } |
1171 | devices[i] = device; |
1172 | cards++; |
1173 | } |
1174 | if (!cards) { |
1175 | #ifdef MODULE |
1176 | printk(KERN_ERR "Dummy soundcard not found or device busy\n" ); |
1177 | #endif |
1178 | snd_dummy_unregister_all(); |
1179 | return -ENODEV; |
1180 | } |
1181 | return 0; |
1182 | } |
1183 | |
1184 | static void __exit alsa_card_dummy_exit(void) |
1185 | { |
1186 | snd_dummy_unregister_all(); |
1187 | } |
1188 | |
1189 | module_init(alsa_card_dummy_init) |
1190 | module_exit(alsa_card_dummy_exit) |
1191 | |