Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * Dummy soundcard | |
c1017a4c | 3 | * Copyright (c) by Jaroslav Kysela <perex@perex.cz> |
1da177e4 LT |
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 | ||
1da177e4 | 21 | #include <linux/init.h> |
6e65c1cc TI |
22 | #include <linux/err.h> |
23 | #include <linux/platform_device.h> | |
1da177e4 LT |
24 | #include <linux/jiffies.h> |
25 | #include <linux/slab.h> | |
26 | #include <linux/time.h> | |
27 | #include <linux/wait.h> | |
c631d03c TI |
28 | #include <linux/hrtimer.h> |
29 | #include <linux/math64.h> | |
1da177e4 LT |
30 | #include <linux/moduleparam.h> |
31 | #include <sound/core.h> | |
32 | #include <sound/control.h> | |
fb567a8e | 33 | #include <sound/tlv.h> |
1da177e4 LT |
34 | #include <sound/pcm.h> |
35 | #include <sound/rawmidi.h> | |
36 | #include <sound/initval.h> | |
37 | ||
c1017a4c | 38 | MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>"); |
1da177e4 LT |
39 | MODULE_DESCRIPTION("Dummy soundcard (/dev/null)"); |
40 | MODULE_LICENSE("GPL"); | |
41 | MODULE_SUPPORTED_DEVICE("{{ALSA,Dummy soundcard}}"); | |
42 | ||
43 | #define MAX_PCM_DEVICES 4 | |
44 | #define MAX_PCM_SUBSTREAMS 16 | |
45 | #define MAX_MIDI_DEVICES 2 | |
46 | ||
47 | #if 0 /* emu10k1 emulation */ | |
48 | #define MAX_BUFFER_SIZE (128 * 1024) | |
4a4d2cfd | 49 | static int emu10k1_playback_constraints(struct snd_pcm_runtime *runtime) |
1da177e4 LT |
50 | { |
51 | int err; | |
1a11cb64 JK |
52 | err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS); |
53 | if (err < 0) | |
1da177e4 | 54 | return err; |
1a11cb64 | 55 | err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 256, UINT_MAX); |
e78521f3 | 56 | if (err < 0) |
1da177e4 LT |
57 | return err; |
58 | return 0; | |
59 | } | |
60 | #define add_playback_constraints emu10k1_playback_constraints | |
61 | #endif | |
62 | ||
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 | |
70 | #endif | |
71 | ||
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 | |
79 | #endif | |
80 | ||
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 | |
88 | #endif | |
89 | ||
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 | |
97 | #endif | |
98 | ||
2ad5dd8d JK |
99 | #if 0 /* CA0106 */ |
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 | |
110 | #endif | |
111 | ||
1da177e4 LT |
112 | |
113 | /* defaults */ | |
114 | #ifndef MAX_BUFFER_SIZE | |
115 | #define MAX_BUFFER_SIZE (64*1024) | |
116 | #endif | |
2ad5dd8d JK |
117 | #ifndef MAX_PERIOD_SIZE |
118 | #define MAX_PERIOD_SIZE MAX_BUFFER_SIZE | |
119 | #endif | |
1da177e4 LT |
120 | #ifndef USE_FORMATS |
121 | #define USE_FORMATS (SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE) | |
122 | #endif | |
123 | #ifndef USE_RATE | |
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 | |
127 | #endif | |
128 | #ifndef USE_CHANNELS_MIN | |
129 | #define USE_CHANNELS_MIN 1 | |
130 | #endif | |
131 | #ifndef USE_CHANNELS_MAX | |
132 | #define USE_CHANNELS_MAX 2 | |
133 | #endif | |
134 | #ifndef USE_PERIODS_MIN | |
135 | #define USE_PERIODS_MIN 1 | |
136 | #endif | |
137 | #ifndef USE_PERIODS_MAX | |
138 | #define USE_PERIODS_MAX 1024 | |
139 | #endif | |
140 | #ifndef add_playback_constraints | |
141 | #define add_playback_constraints(x) 0 | |
142 | #endif | |
143 | #ifndef add_capture_constraints | |
144 | #define add_capture_constraints(x) 0 | |
145 | #endif | |
146 | ||
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}; | |
c631d03c TI |
153 | #ifdef CONFIG_HIGH_RES_TIMERS |
154 | static int hrtimer = 1; | |
155 | #endif | |
1da177e4 LT |
156 | |
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."); | |
c631d03c TI |
169 | #ifdef CONFIG_HIGH_RES_TIMERS |
170 | module_param(hrtimer, bool, 0644); | |
171 | MODULE_PARM_DESC(hrtimer, "Use hrtimer as the timer source."); | |
172 | #endif | |
1da177e4 | 173 | |
f7a9275d CL |
174 | static struct platform_device *devices[SNDRV_CARDS]; |
175 | ||
1da177e4 LT |
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 | |
182 | ||
c631d03c TI |
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 *); | |
190 | }; | |
191 | ||
4a4d2cfd TI |
192 | struct snd_dummy { |
193 | struct snd_card *card; | |
6e65c1cc | 194 | struct snd_pcm *pcm; |
1da177e4 LT |
195 | spinlock_t mixer_lock; |
196 | int mixer_volume[MIXER_ADDR_LAST+1][2]; | |
197 | int capture_source[MIXER_ADDR_LAST+1][2]; | |
c631d03c | 198 | const struct dummy_timer_ops *timer_ops; |
4a4d2cfd | 199 | }; |
1da177e4 | 200 | |
c631d03c TI |
201 | /* |
202 | * system timer interface | |
203 | */ | |
204 | ||
205 | struct dummy_systimer_pcm { | |
1da177e4 LT |
206 | spinlock_t lock; |
207 | struct timer_list timer; | |
b142037b TI |
208 | unsigned long base_time; |
209 | unsigned int frac_pos; /* fractional sample position (based HZ) */ | |
210 | unsigned int frac_buffer_size; /* buffer_size * HZ */ | |
211 | unsigned int frac_period_size; /* period_size * HZ */ | |
212 | unsigned int rate; | |
4a4d2cfd TI |
213 | struct snd_pcm_substream *substream; |
214 | }; | |
1da177e4 | 215 | |
b142037b TI |
216 | static void dummy_systimer_rearm(struct dummy_systimer_pcm *dpcm) |
217 | { | |
218 | unsigned long frac; | |
219 | ||
220 | frac = dpcm->frac_pos % dpcm->frac_period_size; | |
221 | dpcm->timer.expires = jiffies + | |
222 | (dpcm->frac_period_size + dpcm->rate - 1) / dpcm->rate; | |
223 | add_timer(&dpcm->timer); | |
224 | } | |
225 | ||
226 | static void dummy_systimer_update(struct dummy_systimer_pcm *dpcm) | |
227 | { | |
228 | unsigned long delta; | |
229 | ||
230 | delta = jiffies - dpcm->base_time; | |
231 | if (!delta) | |
232 | return; | |
233 | dpcm->base_time = jiffies; | |
234 | dpcm->frac_pos += delta * dpcm->rate; | |
235 | while (dpcm->frac_pos >= dpcm->frac_buffer_size) | |
236 | dpcm->frac_pos -= dpcm->frac_buffer_size; | |
237 | } | |
238 | ||
c631d03c | 239 | static int dummy_systimer_start(struct snd_pcm_substream *substream) |
1da177e4 | 240 | { |
c631d03c TI |
241 | struct dummy_systimer_pcm *dpcm = substream->runtime->private_data; |
242 | spin_lock(&dpcm->lock); | |
b142037b TI |
243 | dpcm->base_time = jiffies; |
244 | dummy_systimer_rearm(dpcm); | |
c631d03c TI |
245 | spin_unlock(&dpcm->lock); |
246 | return 0; | |
1da177e4 LT |
247 | } |
248 | ||
c631d03c | 249 | static int dummy_systimer_stop(struct snd_pcm_substream *substream) |
1da177e4 | 250 | { |
c631d03c | 251 | struct dummy_systimer_pcm *dpcm = substream->runtime->private_data; |
c8eb6ba1 | 252 | spin_lock(&dpcm->lock); |
c631d03c | 253 | del_timer(&dpcm->timer); |
c8eb6ba1 | 254 | spin_unlock(&dpcm->lock); |
6e65c1cc | 255 | return 0; |
1da177e4 LT |
256 | } |
257 | ||
c631d03c | 258 | static int dummy_systimer_prepare(struct snd_pcm_substream *substream) |
1da177e4 | 259 | { |
4a4d2cfd | 260 | struct snd_pcm_runtime *runtime = substream->runtime; |
c631d03c | 261 | struct dummy_systimer_pcm *dpcm = runtime->private_data; |
369b240d | 262 | |
b142037b TI |
263 | dpcm->frac_pos = 0; |
264 | dpcm->rate = runtime->rate; | |
265 | dpcm->frac_buffer_size = runtime->buffer_size * HZ; | |
266 | dpcm->frac_period_size = runtime->period_size * HZ; | |
53463a83 | 267 | |
1da177e4 LT |
268 | return 0; |
269 | } | |
270 | ||
c631d03c | 271 | static void dummy_systimer_callback(unsigned long data) |
1da177e4 | 272 | { |
c631d03c | 273 | struct dummy_systimer_pcm *dpcm = (struct dummy_systimer_pcm *)data; |
b32425ac | 274 | unsigned long flags; |
1da177e4 | 275 | |
b32425ac | 276 | spin_lock_irqsave(&dpcm->lock, flags); |
b142037b TI |
277 | dummy_systimer_update(dpcm); |
278 | dummy_systimer_rearm(dpcm); | |
279 | spin_unlock_irqrestore(&dpcm->lock, flags); | |
280 | snd_pcm_period_elapsed(dpcm->substream); | |
1da177e4 LT |
281 | } |
282 | ||
c631d03c TI |
283 | static snd_pcm_uframes_t |
284 | dummy_systimer_pointer(struct snd_pcm_substream *substream) | |
1da177e4 | 285 | { |
b142037b | 286 | struct dummy_systimer_pcm *dpcm = substream->runtime->private_data; |
1da177e4 | 287 | |
b142037b TI |
288 | spin_lock(&dpcm->lock); |
289 | dummy_systimer_update(dpcm); | |
290 | spin_unlock(&dpcm->lock); | |
291 | return dpcm->frac_pos / HZ; | |
1da177e4 LT |
292 | } |
293 | ||
c631d03c | 294 | static int dummy_systimer_create(struct snd_pcm_substream *substream) |
1da177e4 | 295 | { |
c631d03c TI |
296 | struct dummy_systimer_pcm *dpcm; |
297 | ||
298 | dpcm = kzalloc(sizeof(*dpcm), GFP_KERNEL); | |
299 | if (!dpcm) | |
300 | return -ENOMEM; | |
301 | substream->runtime->private_data = dpcm; | |
302 | init_timer(&dpcm->timer); | |
303 | dpcm->timer.data = (unsigned long) dpcm; | |
304 | dpcm->timer.function = dummy_systimer_callback; | |
305 | spin_lock_init(&dpcm->lock); | |
306 | dpcm->substream = substream; | |
307 | return 0; | |
308 | } | |
309 | ||
310 | static void dummy_systimer_free(struct snd_pcm_substream *substream) | |
311 | { | |
312 | kfree(substream->runtime->private_data); | |
313 | } | |
314 | ||
315 | static struct dummy_timer_ops dummy_systimer_ops = { | |
316 | .create = dummy_systimer_create, | |
317 | .free = dummy_systimer_free, | |
318 | .prepare = dummy_systimer_prepare, | |
319 | .start = dummy_systimer_start, | |
320 | .stop = dummy_systimer_stop, | |
321 | .pointer = dummy_systimer_pointer, | |
1da177e4 LT |
322 | }; |
323 | ||
c631d03c TI |
324 | #ifdef CONFIG_HIGH_RES_TIMERS |
325 | /* | |
326 | * hrtimer interface | |
327 | */ | |
328 | ||
329 | struct dummy_hrtimer_pcm { | |
330 | ktime_t base_time; | |
331 | ktime_t period_time; | |
332 | atomic_t running; | |
333 | struct hrtimer timer; | |
334 | struct tasklet_struct tasklet; | |
335 | struct snd_pcm_substream *substream; | |
336 | }; | |
337 | ||
338 | static void dummy_hrtimer_pcm_elapsed(unsigned long priv) | |
339 | { | |
340 | struct dummy_hrtimer_pcm *dpcm = (struct dummy_hrtimer_pcm *)priv; | |
341 | if (atomic_read(&dpcm->running)) | |
342 | snd_pcm_period_elapsed(dpcm->substream); | |
343 | } | |
344 | ||
345 | static enum hrtimer_restart dummy_hrtimer_callback(struct hrtimer *timer) | |
346 | { | |
347 | struct dummy_hrtimer_pcm *dpcm; | |
348 | ||
349 | dpcm = container_of(timer, struct dummy_hrtimer_pcm, timer); | |
350 | if (!atomic_read(&dpcm->running)) | |
351 | return HRTIMER_NORESTART; | |
352 | tasklet_schedule(&dpcm->tasklet); | |
353 | hrtimer_forward_now(timer, dpcm->period_time); | |
354 | return HRTIMER_RESTART; | |
355 | } | |
356 | ||
357 | static int dummy_hrtimer_start(struct snd_pcm_substream *substream) | |
358 | { | |
359 | struct dummy_hrtimer_pcm *dpcm = substream->runtime->private_data; | |
360 | ||
361 | dpcm->base_time = hrtimer_cb_get_time(&dpcm->timer); | |
362 | hrtimer_start(&dpcm->timer, dpcm->period_time, HRTIMER_MODE_REL); | |
363 | atomic_set(&dpcm->running, 1); | |
364 | return 0; | |
365 | } | |
366 | ||
367 | static int dummy_hrtimer_stop(struct snd_pcm_substream *substream) | |
368 | { | |
369 | struct dummy_hrtimer_pcm *dpcm = substream->runtime->private_data; | |
370 | ||
371 | atomic_set(&dpcm->running, 0); | |
372 | hrtimer_cancel(&dpcm->timer); | |
373 | return 0; | |
374 | } | |
375 | ||
376 | static inline void dummy_hrtimer_sync(struct dummy_hrtimer_pcm *dpcm) | |
377 | { | |
378 | tasklet_kill(&dpcm->tasklet); | |
379 | } | |
380 | ||
381 | static snd_pcm_uframes_t | |
382 | dummy_hrtimer_pointer(struct snd_pcm_substream *substream) | |
383 | { | |
384 | struct snd_pcm_runtime *runtime = substream->runtime; | |
385 | struct dummy_hrtimer_pcm *dpcm = runtime->private_data; | |
386 | u64 delta; | |
387 | u32 pos; | |
388 | ||
389 | delta = ktime_us_delta(hrtimer_cb_get_time(&dpcm->timer), | |
390 | dpcm->base_time); | |
391 | delta = div_u64(delta * runtime->rate + 999999, 1000000); | |
392 | div_u64_rem(delta, runtime->buffer_size, &pos); | |
393 | return pos; | |
394 | } | |
395 | ||
396 | static int dummy_hrtimer_prepare(struct snd_pcm_substream *substream) | |
1da177e4 | 397 | { |
c631d03c TI |
398 | struct snd_pcm_runtime *runtime = substream->runtime; |
399 | struct dummy_hrtimer_pcm *dpcm = runtime->private_data; | |
400 | unsigned int period, rate; | |
401 | long sec; | |
402 | unsigned long nsecs; | |
403 | ||
404 | dummy_hrtimer_sync(dpcm); | |
405 | period = runtime->period_size; | |
406 | rate = runtime->rate; | |
407 | sec = period / rate; | |
408 | period %= rate; | |
409 | nsecs = div_u64((u64)period * 1000000000UL + rate - 1, rate); | |
410 | dpcm->period_time = ktime_set(sec, nsecs); | |
411 | ||
412 | return 0; | |
413 | } | |
414 | ||
415 | static int dummy_hrtimer_create(struct snd_pcm_substream *substream) | |
416 | { | |
417 | struct dummy_hrtimer_pcm *dpcm; | |
418 | ||
419 | dpcm = kzalloc(sizeof(*dpcm), GFP_KERNEL); | |
420 | if (!dpcm) | |
421 | return -ENOMEM; | |
422 | substream->runtime->private_data = dpcm; | |
423 | hrtimer_init(&dpcm->timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); | |
424 | dpcm->timer.function = dummy_hrtimer_callback; | |
425 | dpcm->substream = substream; | |
426 | atomic_set(&dpcm->running, 0); | |
427 | tasklet_init(&dpcm->tasklet, dummy_hrtimer_pcm_elapsed, | |
428 | (unsigned long)dpcm); | |
429 | return 0; | |
430 | } | |
431 | ||
432 | static void dummy_hrtimer_free(struct snd_pcm_substream *substream) | |
433 | { | |
434 | struct dummy_hrtimer_pcm *dpcm = substream->runtime->private_data; | |
435 | dummy_hrtimer_sync(dpcm); | |
436 | kfree(dpcm); | |
437 | } | |
438 | ||
439 | static struct dummy_timer_ops dummy_hrtimer_ops = { | |
440 | .create = dummy_hrtimer_create, | |
441 | .free = dummy_hrtimer_free, | |
442 | .prepare = dummy_hrtimer_prepare, | |
443 | .start = dummy_hrtimer_start, | |
444 | .stop = dummy_hrtimer_stop, | |
445 | .pointer = dummy_hrtimer_pointer, | |
446 | }; | |
447 | ||
448 | #endif /* CONFIG_HIGH_RES_TIMERS */ | |
449 | ||
450 | /* | |
451 | * PCM interface | |
452 | */ | |
453 | ||
454 | static int dummy_pcm_trigger(struct snd_pcm_substream *substream, int cmd) | |
455 | { | |
456 | struct snd_dummy *dummy = snd_pcm_substream_chip(substream); | |
457 | ||
458 | switch (cmd) { | |
459 | case SNDRV_PCM_TRIGGER_START: | |
460 | case SNDRV_PCM_TRIGGER_RESUME: | |
461 | return dummy->timer_ops->start(substream); | |
462 | case SNDRV_PCM_TRIGGER_STOP: | |
463 | case SNDRV_PCM_TRIGGER_SUSPEND: | |
464 | return dummy->timer_ops->stop(substream); | |
465 | } | |
466 | return -EINVAL; | |
467 | } | |
468 | ||
469 | static int dummy_pcm_prepare(struct snd_pcm_substream *substream) | |
470 | { | |
471 | struct snd_pcm_runtime *runtime = substream->runtime; | |
472 | struct snd_dummy *dummy = snd_pcm_substream_chip(substream); | |
473 | ||
474 | snd_pcm_format_set_silence(runtime->format, runtime->dma_area, | |
475 | bytes_to_samples(runtime, runtime->dma_bytes)); | |
476 | return dummy->timer_ops->prepare(substream); | |
477 | } | |
478 | ||
479 | static snd_pcm_uframes_t dummy_pcm_pointer(struct snd_pcm_substream *substream) | |
480 | { | |
481 | struct snd_dummy *dummy = snd_pcm_substream_chip(substream); | |
482 | ||
483 | return dummy->timer_ops->pointer(substream); | |
484 | } | |
485 | ||
486 | static struct snd_pcm_hardware dummy_pcm_hardware = { | |
487 | .info = (SNDRV_PCM_INFO_MMAP | | |
488 | SNDRV_PCM_INFO_INTERLEAVED | | |
489 | SNDRV_PCM_INFO_RESUME | | |
490 | SNDRV_PCM_INFO_MMAP_VALID), | |
1da177e4 LT |
491 | .formats = USE_FORMATS, |
492 | .rates = USE_RATE, | |
493 | .rate_min = USE_RATE_MIN, | |
494 | .rate_max = USE_RATE_MAX, | |
495 | .channels_min = USE_CHANNELS_MIN, | |
496 | .channels_max = USE_CHANNELS_MAX, | |
497 | .buffer_bytes_max = MAX_BUFFER_SIZE, | |
498 | .period_bytes_min = 64, | |
2ad5dd8d | 499 | .period_bytes_max = MAX_PERIOD_SIZE, |
1da177e4 LT |
500 | .periods_min = USE_PERIODS_MIN, |
501 | .periods_max = USE_PERIODS_MAX, | |
502 | .fifo_size = 0, | |
503 | }; | |
504 | ||
c631d03c TI |
505 | static int dummy_pcm_hw_params(struct snd_pcm_substream *substream, |
506 | struct snd_pcm_hw_params *hw_params) | |
1da177e4 | 507 | { |
c631d03c TI |
508 | return snd_pcm_lib_malloc_pages(substream, |
509 | params_buffer_bytes(hw_params)); | |
1da177e4 LT |
510 | } |
511 | ||
c631d03c | 512 | static int dummy_pcm_hw_free(struct snd_pcm_substream *substream) |
1da177e4 LT |
513 | { |
514 | return snd_pcm_lib_free_pages(substream); | |
515 | } | |
516 | ||
c631d03c | 517 | static int dummy_pcm_open(struct snd_pcm_substream *substream) |
c8eb6ba1 | 518 | { |
c631d03c | 519 | struct snd_dummy *dummy = snd_pcm_substream_chip(substream); |
4a4d2cfd | 520 | struct snd_pcm_runtime *runtime = substream->runtime; |
c8eb6ba1 TI |
521 | int err; |
522 | ||
c631d03c TI |
523 | dummy->timer_ops = &dummy_systimer_ops; |
524 | #ifdef CONFIG_HIGH_RES_TIMERS | |
525 | if (hrtimer) | |
526 | dummy->timer_ops = &dummy_hrtimer_ops; | |
527 | #endif | |
528 | ||
529 | err = dummy->timer_ops->create(substream); | |
1a11cb64 | 530 | if (err < 0) |
1da177e4 | 531 | return err; |
1da177e4 | 532 | |
c631d03c TI |
533 | runtime->hw = dummy_pcm_hardware; |
534 | if (substream->pcm->device & 1) { | |
1da177e4 LT |
535 | runtime->hw.info &= ~SNDRV_PCM_INFO_INTERLEAVED; |
536 | runtime->hw.info |= SNDRV_PCM_INFO_NONINTERLEAVED; | |
537 | } | |
538 | if (substream->pcm->device & 2) | |
c631d03c TI |
539 | runtime->hw.info &= ~(SNDRV_PCM_INFO_MMAP | |
540 | SNDRV_PCM_INFO_MMAP_VALID); | |
541 | ||
542 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) | |
543 | err = add_playback_constraints(substream->runtime); | |
544 | else | |
545 | err = add_capture_constraints(substream->runtime); | |
546 | if (err < 0) { | |
547 | dummy->timer_ops->free(substream); | |
1da177e4 | 548 | return err; |
c631d03c | 549 | } |
1da177e4 LT |
550 | return 0; |
551 | } | |
552 | ||
c631d03c | 553 | static int dummy_pcm_close(struct snd_pcm_substream *substream) |
1da177e4 | 554 | { |
c631d03c TI |
555 | struct snd_dummy *dummy = snd_pcm_substream_chip(substream); |
556 | dummy->timer_ops->free(substream); | |
1da177e4 LT |
557 | return 0; |
558 | } | |
559 | ||
c631d03c TI |
560 | static struct snd_pcm_ops dummy_pcm_ops = { |
561 | .open = dummy_pcm_open, | |
562 | .close = dummy_pcm_close, | |
563 | .ioctl = snd_pcm_lib_ioctl, | |
564 | .hw_params = dummy_pcm_hw_params, | |
565 | .hw_free = dummy_pcm_hw_free, | |
566 | .prepare = dummy_pcm_prepare, | |
567 | .trigger = dummy_pcm_trigger, | |
568 | .pointer = dummy_pcm_pointer, | |
1da177e4 LT |
569 | }; |
570 | ||
788c6043 PB |
571 | static int __devinit snd_card_dummy_pcm(struct snd_dummy *dummy, int device, |
572 | int substreams) | |
1da177e4 | 573 | { |
4a4d2cfd | 574 | struct snd_pcm *pcm; |
1da177e4 LT |
575 | int err; |
576 | ||
1a11cb64 JK |
577 | err = snd_pcm_new(dummy->card, "Dummy PCM", device, |
578 | substreams, substreams, &pcm); | |
579 | if (err < 0) | |
1da177e4 | 580 | return err; |
6e65c1cc | 581 | dummy->pcm = pcm; |
c631d03c TI |
582 | snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &dummy_pcm_ops); |
583 | snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &dummy_pcm_ops); | |
1da177e4 LT |
584 | pcm->private_data = dummy; |
585 | pcm->info_flags = 0; | |
586 | strcpy(pcm->name, "Dummy PCM"); | |
587 | snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_CONTINUOUS, | |
588 | snd_dma_continuous_data(GFP_KERNEL), | |
589 | 0, 64*1024); | |
590 | return 0; | |
591 | } | |
592 | ||
593 | #define DUMMY_VOLUME(xname, xindex, addr) \ | |
fb567a8e TI |
594 | { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, \ |
595 | .access = SNDRV_CTL_ELEM_ACCESS_READWRITE | SNDRV_CTL_ELEM_ACCESS_TLV_READ, \ | |
596 | .name = xname, .index = xindex, \ | |
1da177e4 LT |
597 | .info = snd_dummy_volume_info, \ |
598 | .get = snd_dummy_volume_get, .put = snd_dummy_volume_put, \ | |
fb567a8e TI |
599 | .private_value = addr, \ |
600 | .tlv = { .p = db_scale_dummy } } | |
1da177e4 | 601 | |
4a4d2cfd TI |
602 | static int snd_dummy_volume_info(struct snd_kcontrol *kcontrol, |
603 | struct snd_ctl_elem_info *uinfo) | |
1da177e4 LT |
604 | { |
605 | uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; | |
606 | uinfo->count = 2; | |
607 | uinfo->value.integer.min = -50; | |
608 | uinfo->value.integer.max = 100; | |
609 | return 0; | |
610 | } | |
611 | ||
4a4d2cfd TI |
612 | static int snd_dummy_volume_get(struct snd_kcontrol *kcontrol, |
613 | struct snd_ctl_elem_value *ucontrol) | |
1da177e4 | 614 | { |
4a4d2cfd | 615 | struct snd_dummy *dummy = snd_kcontrol_chip(kcontrol); |
1da177e4 LT |
616 | int addr = kcontrol->private_value; |
617 | ||
c8eb6ba1 | 618 | spin_lock_irq(&dummy->mixer_lock); |
1da177e4 LT |
619 | ucontrol->value.integer.value[0] = dummy->mixer_volume[addr][0]; |
620 | ucontrol->value.integer.value[1] = dummy->mixer_volume[addr][1]; | |
c8eb6ba1 | 621 | spin_unlock_irq(&dummy->mixer_lock); |
1da177e4 LT |
622 | return 0; |
623 | } | |
624 | ||
4a4d2cfd TI |
625 | static int snd_dummy_volume_put(struct snd_kcontrol *kcontrol, |
626 | struct snd_ctl_elem_value *ucontrol) | |
1da177e4 | 627 | { |
4a4d2cfd | 628 | struct snd_dummy *dummy = snd_kcontrol_chip(kcontrol); |
1da177e4 LT |
629 | int change, addr = kcontrol->private_value; |
630 | int left, right; | |
631 | ||
632 | left = ucontrol->value.integer.value[0]; | |
633 | if (left < -50) | |
634 | left = -50; | |
635 | if (left > 100) | |
636 | left = 100; | |
637 | right = ucontrol->value.integer.value[1]; | |
638 | if (right < -50) | |
639 | right = -50; | |
640 | if (right > 100) | |
641 | right = 100; | |
c8eb6ba1 | 642 | spin_lock_irq(&dummy->mixer_lock); |
1da177e4 LT |
643 | change = dummy->mixer_volume[addr][0] != left || |
644 | dummy->mixer_volume[addr][1] != right; | |
645 | dummy->mixer_volume[addr][0] = left; | |
646 | dummy->mixer_volume[addr][1] = right; | |
c8eb6ba1 | 647 | spin_unlock_irq(&dummy->mixer_lock); |
1da177e4 LT |
648 | return change; |
649 | } | |
650 | ||
0cb29ea0 | 651 | static const DECLARE_TLV_DB_SCALE(db_scale_dummy, -4500, 30, 0); |
fb567a8e | 652 | |
1da177e4 LT |
653 | #define DUMMY_CAPSRC(xname, xindex, addr) \ |
654 | { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \ | |
655 | .info = snd_dummy_capsrc_info, \ | |
656 | .get = snd_dummy_capsrc_get, .put = snd_dummy_capsrc_put, \ | |
657 | .private_value = addr } | |
658 | ||
a5ce8890 | 659 | #define snd_dummy_capsrc_info snd_ctl_boolean_stereo_info |
1da177e4 | 660 | |
4a4d2cfd TI |
661 | static int snd_dummy_capsrc_get(struct snd_kcontrol *kcontrol, |
662 | struct snd_ctl_elem_value *ucontrol) | |
1da177e4 | 663 | { |
4a4d2cfd | 664 | struct snd_dummy *dummy = snd_kcontrol_chip(kcontrol); |
1da177e4 LT |
665 | int addr = kcontrol->private_value; |
666 | ||
c8eb6ba1 | 667 | spin_lock_irq(&dummy->mixer_lock); |
1da177e4 LT |
668 | ucontrol->value.integer.value[0] = dummy->capture_source[addr][0]; |
669 | ucontrol->value.integer.value[1] = dummy->capture_source[addr][1]; | |
c8eb6ba1 | 670 | spin_unlock_irq(&dummy->mixer_lock); |
1da177e4 LT |
671 | return 0; |
672 | } | |
673 | ||
4a4d2cfd | 674 | static int snd_dummy_capsrc_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) |
1da177e4 | 675 | { |
4a4d2cfd | 676 | struct snd_dummy *dummy = snd_kcontrol_chip(kcontrol); |
1da177e4 LT |
677 | int change, addr = kcontrol->private_value; |
678 | int left, right; | |
679 | ||
680 | left = ucontrol->value.integer.value[0] & 1; | |
681 | right = ucontrol->value.integer.value[1] & 1; | |
c8eb6ba1 | 682 | spin_lock_irq(&dummy->mixer_lock); |
1da177e4 LT |
683 | change = dummy->capture_source[addr][0] != left && |
684 | dummy->capture_source[addr][1] != right; | |
685 | dummy->capture_source[addr][0] = left; | |
686 | dummy->capture_source[addr][1] = right; | |
c8eb6ba1 | 687 | spin_unlock_irq(&dummy->mixer_lock); |
1da177e4 LT |
688 | return change; |
689 | } | |
690 | ||
4a4d2cfd | 691 | static struct snd_kcontrol_new snd_dummy_controls[] = { |
1da177e4 LT |
692 | DUMMY_VOLUME("Master Volume", 0, MIXER_ADDR_MASTER), |
693 | DUMMY_CAPSRC("Master Capture Switch", 0, MIXER_ADDR_MASTER), | |
694 | DUMMY_VOLUME("Synth Volume", 0, MIXER_ADDR_SYNTH), | |
e05d6964 | 695 | DUMMY_CAPSRC("Synth Capture Switch", 0, MIXER_ADDR_SYNTH), |
1da177e4 | 696 | DUMMY_VOLUME("Line Volume", 0, MIXER_ADDR_LINE), |
e05d6964 | 697 | DUMMY_CAPSRC("Line Capture Switch", 0, MIXER_ADDR_LINE), |
1da177e4 | 698 | DUMMY_VOLUME("Mic Volume", 0, MIXER_ADDR_MIC), |
e05d6964 | 699 | DUMMY_CAPSRC("Mic Capture Switch", 0, MIXER_ADDR_MIC), |
1da177e4 | 700 | DUMMY_VOLUME("CD Volume", 0, MIXER_ADDR_CD), |
e05d6964 | 701 | DUMMY_CAPSRC("CD Capture Switch", 0, MIXER_ADDR_CD) |
1da177e4 LT |
702 | }; |
703 | ||
788c6043 | 704 | static int __devinit snd_card_dummy_new_mixer(struct snd_dummy *dummy) |
1da177e4 | 705 | { |
4a4d2cfd | 706 | struct snd_card *card = dummy->card; |
1da177e4 LT |
707 | unsigned int idx; |
708 | int err; | |
709 | ||
5e246b85 TI |
710 | if (snd_BUG_ON(!dummy)) |
711 | return -EINVAL; | |
1da177e4 LT |
712 | spin_lock_init(&dummy->mixer_lock); |
713 | strcpy(card->mixername, "Dummy Mixer"); | |
714 | ||
715 | for (idx = 0; idx < ARRAY_SIZE(snd_dummy_controls); idx++) { | |
1a11cb64 JK |
716 | err = snd_ctl_add(card, snd_ctl_new1(&snd_dummy_controls[idx], dummy)); |
717 | if (err < 0) | |
1da177e4 LT |
718 | return err; |
719 | } | |
720 | return 0; | |
721 | } | |
722 | ||
788c6043 | 723 | static int __devinit snd_dummy_probe(struct platform_device *devptr) |
1da177e4 | 724 | { |
4a4d2cfd TI |
725 | struct snd_card *card; |
726 | struct snd_dummy *dummy; | |
1da177e4 | 727 | int idx, err; |
6e65c1cc | 728 | int dev = devptr->id; |
1da177e4 | 729 | |
bd7dd77c TI |
730 | err = snd_card_create(index[dev], id[dev], THIS_MODULE, |
731 | sizeof(struct snd_dummy), &card); | |
732 | if (err < 0) | |
733 | return err; | |
4a4d2cfd | 734 | dummy = card->private_data; |
1da177e4 LT |
735 | dummy->card = card; |
736 | for (idx = 0; idx < MAX_PCM_DEVICES && idx < pcm_devs[dev]; idx++) { | |
737 | if (pcm_substreams[dev] < 1) | |
738 | pcm_substreams[dev] = 1; | |
739 | if (pcm_substreams[dev] > MAX_PCM_SUBSTREAMS) | |
740 | pcm_substreams[dev] = MAX_PCM_SUBSTREAMS; | |
1a11cb64 JK |
741 | err = snd_card_dummy_pcm(dummy, idx, pcm_substreams[dev]); |
742 | if (err < 0) | |
1da177e4 LT |
743 | goto __nodev; |
744 | } | |
1a11cb64 JK |
745 | err = snd_card_dummy_new_mixer(dummy); |
746 | if (err < 0) | |
1da177e4 LT |
747 | goto __nodev; |
748 | strcpy(card->driver, "Dummy"); | |
749 | strcpy(card->shortname, "Dummy"); | |
750 | sprintf(card->longname, "Dummy %i", dev + 1); | |
16dab54b | 751 | |
6e65c1cc | 752 | snd_card_set_dev(card, &devptr->dev); |
16dab54b | 753 | |
1a11cb64 JK |
754 | err = snd_card_register(card); |
755 | if (err == 0) { | |
6e65c1cc | 756 | platform_set_drvdata(devptr, card); |
1da177e4 LT |
757 | return 0; |
758 | } | |
759 | __nodev: | |
760 | snd_card_free(card); | |
761 | return err; | |
762 | } | |
763 | ||
788c6043 | 764 | static int __devexit snd_dummy_remove(struct platform_device *devptr) |
6e65c1cc TI |
765 | { |
766 | snd_card_free(platform_get_drvdata(devptr)); | |
767 | platform_set_drvdata(devptr, NULL); | |
768 | return 0; | |
769 | } | |
770 | ||
771 | #ifdef CONFIG_PM | |
772 | static int snd_dummy_suspend(struct platform_device *pdev, pm_message_t state) | |
1da177e4 | 773 | { |
6e65c1cc TI |
774 | struct snd_card *card = platform_get_drvdata(pdev); |
775 | struct snd_dummy *dummy = card->private_data; | |
1da177e4 | 776 | |
6e65c1cc TI |
777 | snd_power_change_state(card, SNDRV_CTL_POWER_D3hot); |
778 | snd_pcm_suspend_all(dummy->pcm); | |
779 | return 0; | |
780 | } | |
781 | ||
782 | static int snd_dummy_resume(struct platform_device *pdev) | |
783 | { | |
784 | struct snd_card *card = platform_get_drvdata(pdev); | |
785 | ||
786 | snd_power_change_state(card, SNDRV_CTL_POWER_D0); | |
787 | return 0; | |
788 | } | |
789 | #endif | |
790 | ||
791 | #define SND_DUMMY_DRIVER "snd_dummy" | |
792 | ||
793 | static struct platform_driver snd_dummy_driver = { | |
794 | .probe = snd_dummy_probe, | |
788c6043 | 795 | .remove = __devexit_p(snd_dummy_remove), |
6e65c1cc TI |
796 | #ifdef CONFIG_PM |
797 | .suspend = snd_dummy_suspend, | |
798 | .resume = snd_dummy_resume, | |
1da177e4 | 799 | #endif |
6e65c1cc TI |
800 | .driver = { |
801 | .name = SND_DUMMY_DRIVER | |
802 | }, | |
803 | }; | |
804 | ||
c12aad6e | 805 | static void snd_dummy_unregister_all(void) |
f7a9275d CL |
806 | { |
807 | int i; | |
808 | ||
809 | for (i = 0; i < ARRAY_SIZE(devices); ++i) | |
810 | platform_device_unregister(devices[i]); | |
811 | platform_driver_unregister(&snd_dummy_driver); | |
812 | } | |
813 | ||
6e65c1cc TI |
814 | static int __init alsa_card_dummy_init(void) |
815 | { | |
816 | int i, cards, err; | |
817 | ||
1a11cb64 JK |
818 | err = platform_driver_register(&snd_dummy_driver); |
819 | if (err < 0) | |
6e65c1cc TI |
820 | return err; |
821 | ||
822 | cards = 0; | |
8278ca8f | 823 | for (i = 0; i < SNDRV_CARDS; i++) { |
6e65c1cc | 824 | struct platform_device *device; |
8278ca8f TI |
825 | if (! enable[i]) |
826 | continue; | |
6e65c1cc TI |
827 | device = platform_device_register_simple(SND_DUMMY_DRIVER, |
828 | i, NULL, 0); | |
a182ee98 RH |
829 | if (IS_ERR(device)) |
830 | continue; | |
7152447d RH |
831 | if (!platform_get_drvdata(device)) { |
832 | platform_device_unregister(device); | |
833 | continue; | |
834 | } | |
f7a9275d | 835 | devices[i] = device; |
1da177e4 LT |
836 | cards++; |
837 | } | |
838 | if (!cards) { | |
839 | #ifdef MODULE | |
840 | printk(KERN_ERR "Dummy soundcard not found or device busy\n"); | |
841 | #endif | |
a182ee98 RH |
842 | snd_dummy_unregister_all(); |
843 | return -ENODEV; | |
1da177e4 LT |
844 | } |
845 | return 0; | |
846 | } | |
847 | ||
848 | static void __exit alsa_card_dummy_exit(void) | |
849 | { | |
f7a9275d | 850 | snd_dummy_unregister_all(); |
1da177e4 LT |
851 | } |
852 | ||
853 | module_init(alsa_card_dummy_init) | |
854 | module_exit(alsa_card_dummy_exit) |