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Merge tag 'v3.10.103' into update
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / sound / drivers / dummy.c
CommitLineData
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>
65a77217 30#include <linux/module.h>
1da177e4
LT		 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>
9b151fec 36#include <sound/info.h>
1da177e4
LT		 37#include <sound/initval.h>
38
c1017a4c 39MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
1da177e4
LT		 40MODULE_DESCRIPTION("Dummy soundcard (/dev/null)");
41MODULE_LICENSE("GPL");
42MODULE_SUPPORTED_DEVICE("{{ALSA,Dummy soundcard}}");
43
44#define MAX_PCM_DEVICES 4
b888d1ce 45#define MAX_PCM_SUBSTREAMS 128
1da177e4
LT		 46#define MAX_MIDI_DEVICES 2
47
1da177e4 48/* defaults */
1da177e4 49#define MAX_BUFFER_SIZE (64*1024)
d5e1ca05 50#define MIN_PERIOD_SIZE 64
2ad5dd8d 51#define MAX_PERIOD_SIZE MAX_BUFFER_SIZE
1da177e4 52#define USE_FORMATS (SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE)
1da177e4
LT		 53#define USE_RATE SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_48000
54#define USE_RATE_MIN 5500
55#define USE_RATE_MAX 48000
1da177e4 56#define USE_CHANNELS_MIN 1
1da177e4 57#define USE_CHANNELS_MAX 2
1da177e4 58#define USE_PERIODS_MIN 1
1da177e4 59#define USE_PERIODS_MAX 1024
1da177e4
LT		 60
61static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-MAX */
62static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* ID for this card */
a67ff6a5 63static bool enable[SNDRV_CARDS] = {1, [1 ... (SNDRV_CARDS - 1)] = 0};
d5e1ca05 64static char *model[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = NULL};
1da177e4
LT		 65static int pcm_devs[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 1};
66static int pcm_substreams[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 8};
67//static int midi_devs[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 2};
c631d03c 68#ifdef CONFIG_HIGH_RES_TIMERS
a67ff6a5 69static bool hrtimer = 1;
c631d03c 70#endif
a67ff6a5 71static bool fake_buffer = 1;
1da177e4
LT		 72
73module_param_array(index, int, NULL, 0444);
74MODULE_PARM_DESC(index, "Index value for dummy soundcard.");
75module_param_array(id, charp, NULL, 0444);
76MODULE_PARM_DESC(id, "ID string for dummy soundcard.");
77module_param_array(enable, bool, NULL, 0444);
78MODULE_PARM_DESC(enable, "Enable this dummy soundcard.");
d5e1ca05
JK		 79module_param_array(model, charp, NULL, 0444);
80MODULE_PARM_DESC(model, "Soundcard model.");
1da177e4
LT		 81module_param_array(pcm_devs, int, NULL, 0444);
82MODULE_PARM_DESC(pcm_devs, "PCM devices # (0-4) for dummy driver.");
83module_param_array(pcm_substreams, int, NULL, 0444);
23aebca4 84MODULE_PARM_DESC(pcm_substreams, "PCM substreams # (1-128) for dummy driver.");
1da177e4
LT		 85//module_param_array(midi_devs, int, NULL, 0444);
86//MODULE_PARM_DESC(midi_devs, "MIDI devices # (0-2) for dummy driver.");
a68c4d11
TI		 87module_param(fake_buffer, bool, 0444);
88MODULE_PARM_DESC(fake_buffer, "Fake buffer allocations.");
c631d03c 89#ifdef CONFIG_HIGH_RES_TIMERS
e063b1a0 90module_param(hrtimer, bool, 0644);
c631d03c
TI		 91MODULE_PARM_DESC(hrtimer, "Use hrtimer as the timer source.");
92#endif
1da177e4 93
f7a9275d
CL		 94static struct platform_device *devices[SNDRV_CARDS];
95
1da177e4
LT		 96#define MIXER_ADDR_MASTER 0
97#define MIXER_ADDR_LINE 1
98#define MIXER_ADDR_MIC 2
99#define MIXER_ADDR_SYNTH 3
100#define MIXER_ADDR_CD 4
101#define MIXER_ADDR_LAST 4
102
c631d03c
TI		 103struct dummy_timer_ops {
104 int (*create)(struct snd_pcm_substream *);
105 void (*free)(struct snd_pcm_substream *);
106 int (*prepare)(struct snd_pcm_substream *);
107 int (*start)(struct snd_pcm_substream *);
108 int (*stop)(struct snd_pcm_substream *);
109 snd_pcm_uframes_t (*pointer)(struct snd_pcm_substream *);
110};
111
e063b1a0
TI		 112#define get_dummy_ops(substream) \
113 (*(const struct dummy_timer_ops **)(substream)->runtime->private_data)
114
d5e1ca05
JK		 115struct dummy_model {
116 const char *name;
117 int (*playback_constraints)(struct snd_pcm_runtime *runtime);
118 int (*capture_constraints)(struct snd_pcm_runtime *runtime);
119 u64 formats;
120 size_t buffer_bytes_max;
121 size_t period_bytes_min;
122 size_t period_bytes_max;
123 unsigned int periods_min;
124 unsigned int periods_max;
125 unsigned int rates;
126 unsigned int rate_min;
127 unsigned int rate_max;
128 unsigned int channels_min;
129 unsigned int channels_max;
130};
131
4a4d2cfd
TI		 132struct snd_dummy {
133 struct snd_card *card;
d5e1ca05 134 struct dummy_model *model;
6e65c1cc 135 struct snd_pcm *pcm;
d5e1ca05 136 struct snd_pcm_hardware pcm_hw;
1da177e4
LT		 137 spinlock_t mixer_lock;
138 int mixer_volume[MIXER_ADDR_LAST+1][2];
139 int capture_source[MIXER_ADDR_LAST+1][2];
16e43467
CL		 140 int iobox;
141 struct snd_kcontrol *cd_volume_ctl;
142 struct snd_kcontrol *cd_switch_ctl;
4a4d2cfd 143};
1da177e4 144
d5e1ca05
JK		 145/*
146 * card models
147 */
148
149static int emu10k1_playback_constraints(struct snd_pcm_runtime *runtime)
150{
151 int err;
152 err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
153 if (err < 0)
154 return err;
155 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 256, UINT_MAX);
156 if (err < 0)
157 return err;
158 return 0;
159}
160
161struct dummy_model model_emu10k1 = {
162 .name = "emu10k1",
163 .playback_constraints = emu10k1_playback_constraints,
164 .buffer_bytes_max = 128 * 1024,
165};
166
167struct dummy_model model_rme9652 = {
168 .name = "rme9652",
169 .buffer_bytes_max = 26 * 64 * 1024,
170 .formats = SNDRV_PCM_FMTBIT_S32_LE,
171 .channels_min = 26,
172 .channels_max = 26,
173 .periods_min = 2,
174 .periods_max = 2,
175};
176
177struct dummy_model model_ice1712 = {
178 .name = "ice1712",
179 .buffer_bytes_max = 256 * 1024,
180 .formats = SNDRV_PCM_FMTBIT_S32_LE,
181 .channels_min = 10,
182 .channels_max = 10,
183 .periods_min = 1,
184 .periods_max = 1024,
185};
186
187struct dummy_model model_uda1341 = {
188 .name = "uda1341",
189 .buffer_bytes_max = 16380,
190 .formats = SNDRV_PCM_FMTBIT_S16_LE,
191 .channels_min = 2,
192 .channels_max = 2,
193 .periods_min = 2,
194 .periods_max = 255,
195};
196
197struct dummy_model model_ac97 = {
198 .name = "ac97",
199 .formats = SNDRV_PCM_FMTBIT_S16_LE,
200 .channels_min = 2,
201 .channels_max = 2,
202 .rates = SNDRV_PCM_RATE_48000,
203 .rate_min = 48000,
204 .rate_max = 48000,
205};
206
207struct dummy_model model_ca0106 = {
208 .name = "ca0106",
209 .formats = SNDRV_PCM_FMTBIT_S16_LE,
210 .buffer_bytes_max = ((65536-64)*8),
211 .period_bytes_max = (65536-64),
212 .periods_min = 2,
213 .periods_max = 8,
214 .channels_min = 2,
215 .channels_max = 2,
216 .rates = SNDRV_PCM_RATE_48000|SNDRV_PCM_RATE_96000|SNDRV_PCM_RATE_192000,
217 .rate_min = 48000,
218 .rate_max = 192000,
219};
220
221struct dummy_model *dummy_models[] = {
222 &model_emu10k1,
223 &model_rme9652,
224 &model_ice1712,
225 &model_uda1341,
226 &model_ac97,
227 &model_ca0106,
228 NULL
229};
230
c631d03c
TI		 231/*
232 * system timer interface
233 */
234
235struct dummy_systimer_pcm {
e063b1a0
TI		 236 /* ops must be the first item */
237 const struct dummy_timer_ops *timer_ops;
1da177e4
LT		 238 spinlock_t lock;
239 struct timer_list timer;
b142037b
TI		 240 unsigned long base_time;
241 unsigned int frac_pos; /* fractional sample position (based HZ) */
b5d10781 242 unsigned int frac_period_rest;
b142037b
TI		 243 unsigned int frac_buffer_size; /* buffer_size * HZ */
244 unsigned int frac_period_size; /* period_size * HZ */
245 unsigned int rate;
b5d10781 246 int elapsed;
4a4d2cfd
TI		 247 struct snd_pcm_substream *substream;
248};
1da177e4 249
b142037b
TI		 250static void dummy_systimer_rearm(struct dummy_systimer_pcm *dpcm)
251{
b142037b 252 dpcm->timer.expires = jiffies +
b5d10781 253 (dpcm->frac_period_rest + dpcm->rate - 1) / dpcm->rate;
b142037b
TI		 254 add_timer(&dpcm->timer);
255}
256
257static void dummy_systimer_update(struct dummy_systimer_pcm *dpcm)
258{
259 unsigned long delta;
260
261 delta = jiffies - dpcm->base_time;
262 if (!delta)
263 return;
b5d10781
TI		 264 dpcm->base_time += delta;
265 delta *= dpcm->rate;
266 dpcm->frac_pos += delta;
b142037b
TI		 267 while (dpcm->frac_pos >= dpcm->frac_buffer_size)
268 dpcm->frac_pos -= dpcm->frac_buffer_size;
b5d10781
TI		 269 while (dpcm->frac_period_rest <= delta) {
270 dpcm->elapsed++;
271 dpcm->frac_period_rest += dpcm->frac_period_size;
272 }
273 dpcm->frac_period_rest -= delta;
b142037b
TI		 274}
275
c631d03c 276static int dummy_systimer_start(struct snd_pcm_substream *substream)
1da177e4 277{
c631d03c
TI		 278 struct dummy_systimer_pcm *dpcm = substream->runtime->private_data;
279 spin_lock(&dpcm->lock);
b142037b
TI		 280 dpcm->base_time = jiffies;
281 dummy_systimer_rearm(dpcm);
c631d03c
TI		 282 spin_unlock(&dpcm->lock);
283 return 0;
1da177e4
LT		 284}
285
c631d03c 286static int dummy_systimer_stop(struct snd_pcm_substream *substream)
1da177e4 287{
c631d03c 288 struct dummy_systimer_pcm *dpcm = substream->runtime->private_data;
c8eb6ba1 289 spin_lock(&dpcm->lock);
c631d03c 290 del_timer(&dpcm->timer);
c8eb6ba1 291 spin_unlock(&dpcm->lock);
6e65c1cc 292 return 0;
1da177e4
LT		 293}
294
c631d03c 295static int dummy_systimer_prepare(struct snd_pcm_substream *substream)
1da177e4 296{
4a4d2cfd 297 struct snd_pcm_runtime *runtime = substream->runtime;
c631d03c 298 struct dummy_systimer_pcm *dpcm = runtime->private_data;
369b240d 299
b142037b
TI		 300 dpcm->frac_pos = 0;
301 dpcm->rate = runtime->rate;
302 dpcm->frac_buffer_size = runtime->buffer_size * HZ;
303 dpcm->frac_period_size = runtime->period_size * HZ;
b5d10781
TI		 304 dpcm->frac_period_rest = dpcm->frac_period_size;
305 dpcm->elapsed = 0;
53463a83 306
1da177e4
LT		 307 return 0;
308}
309
c631d03c 310static void dummy_systimer_callback(unsigned long data)
1da177e4 311{
c631d03c 312 struct dummy_systimer_pcm *dpcm = (struct dummy_systimer_pcm *)data;
b32425ac 313 unsigned long flags;
b5d10781 314 int elapsed = 0;
1da177e4 315
b32425ac 316 spin_lock_irqsave(&dpcm->lock, flags);
b142037b
TI		 317 dummy_systimer_update(dpcm);
318 dummy_systimer_rearm(dpcm);
b5d10781
TI		 319 elapsed = dpcm->elapsed;
320 dpcm->elapsed = 0;
b142037b 321 spin_unlock_irqrestore(&dpcm->lock, flags);
b5d10781
TI		 322 if (elapsed)
323 snd_pcm_period_elapsed(dpcm->substream);
1da177e4
LT		 324}
325
c631d03c
TI		 326static snd_pcm_uframes_t
327dummy_systimer_pointer(struct snd_pcm_substream *substream)
1da177e4 328{
b142037b 329 struct dummy_systimer_pcm *dpcm = substream->runtime->private_data;
b5d10781 330 snd_pcm_uframes_t pos;
1da177e4 331
b142037b
TI		 332 spin_lock(&dpcm->lock);
333 dummy_systimer_update(dpcm);
b5d10781 334 pos = dpcm->frac_pos / HZ;
b142037b 335 spin_unlock(&dpcm->lock);
b5d10781 336 return pos;
1da177e4
LT		 337}
338
c631d03c 339static int dummy_systimer_create(struct snd_pcm_substream *substream)
1da177e4 340{
c631d03c
TI		 341 struct dummy_systimer_pcm *dpcm;
342
343 dpcm = kzalloc(sizeof(*dpcm), GFP_KERNEL);
344 if (!dpcm)
345 return -ENOMEM;
346 substream->runtime->private_data = dpcm;
347 init_timer(&dpcm->timer);
348 dpcm->timer.data = (unsigned long) dpcm;
349 dpcm->timer.function = dummy_systimer_callback;
350 spin_lock_init(&dpcm->lock);
351 dpcm->substream = substream;
352 return 0;
353}
354
355static void dummy_systimer_free(struct snd_pcm_substream *substream)
356{
357 kfree(substream->runtime->private_data);
358}
359
360static struct dummy_timer_ops dummy_systimer_ops = {
361 .create = dummy_systimer_create,
362 .free = dummy_systimer_free,
363 .prepare = dummy_systimer_prepare,
364 .start = dummy_systimer_start,
365 .stop = dummy_systimer_stop,
366 .pointer = dummy_systimer_pointer,
1da177e4
LT		 367};
368
c631d03c
TI		 369#ifdef CONFIG_HIGH_RES_TIMERS
370/*
371 * hrtimer interface
372 */
373
374struct dummy_hrtimer_pcm {
e063b1a0
TI		 375 /* ops must be the first item */
376 const struct dummy_timer_ops *timer_ops;
c631d03c
TI		 377 ktime_t base_time;
378 ktime_t period_time;
379 atomic_t running;
380 struct hrtimer timer;
381 struct tasklet_struct tasklet;
382 struct snd_pcm_substream *substream;
383};
384
385static void dummy_hrtimer_pcm_elapsed(unsigned long priv)
386{
387 struct dummy_hrtimer_pcm *dpcm = (struct dummy_hrtimer_pcm *)priv;
388 if (atomic_read(&dpcm->running))
389 snd_pcm_period_elapsed(dpcm->substream);
390}
391
392static enum hrtimer_restart dummy_hrtimer_callback(struct hrtimer *timer)
393{
394 struct dummy_hrtimer_pcm *dpcm;
395
396 dpcm = container_of(timer, struct dummy_hrtimer_pcm, timer);
397 if (!atomic_read(&dpcm->running))
398 return HRTIMER_NORESTART;
399 tasklet_schedule(&dpcm->tasklet);
400 hrtimer_forward_now(timer, dpcm->period_time);
401 return HRTIMER_RESTART;
402}
403
404static int dummy_hrtimer_start(struct snd_pcm_substream *substream)
405{
406 struct dummy_hrtimer_pcm *dpcm = substream->runtime->private_data;
407
408 dpcm->base_time = hrtimer_cb_get_time(&dpcm->timer);
409 hrtimer_start(&dpcm->timer, dpcm->period_time, HRTIMER_MODE_REL);
410 atomic_set(&dpcm->running, 1);
411 return 0;
412}
413
414static int dummy_hrtimer_stop(struct snd_pcm_substream *substream)
415{
416 struct dummy_hrtimer_pcm *dpcm = substream->runtime->private_data;
417
418 atomic_set(&dpcm->running, 0);
419 hrtimer_cancel(&dpcm->timer);
420 return 0;
421}
422
423static inline void dummy_hrtimer_sync(struct dummy_hrtimer_pcm *dpcm)
424{
c3fdd7d3 425 hrtimer_cancel(&dpcm->timer);
c631d03c
TI		 426 tasklet_kill(&dpcm->tasklet);
427}
428
429static snd_pcm_uframes_t
430dummy_hrtimer_pointer(struct snd_pcm_substream *substream)
431{
432 struct snd_pcm_runtime *runtime = substream->runtime;
433 struct dummy_hrtimer_pcm *dpcm = runtime->private_data;
434 u64 delta;
435 u32 pos;
436
437 delta = ktime_us_delta(hrtimer_cb_get_time(&dpcm->timer),
438 dpcm->base_time);
439 delta = div_u64(delta * runtime->rate + 999999, 1000000);
440 div_u64_rem(delta, runtime->buffer_size, &pos);
441 return pos;
442}
443
444static int dummy_hrtimer_prepare(struct snd_pcm_substream *substream)
1da177e4 445{
c631d03c
TI		 446 struct snd_pcm_runtime *runtime = substream->runtime;
447 struct dummy_hrtimer_pcm *dpcm = runtime->private_data;
448 unsigned int period, rate;
449 long sec;
450 unsigned long nsecs;
451
452 dummy_hrtimer_sync(dpcm);
453 period = runtime->period_size;
454 rate = runtime->rate;
455 sec = period / rate;
456 period %= rate;
457 nsecs = div_u64((u64)period * 1000000000UL + rate - 1, rate);
458 dpcm->period_time = ktime_set(sec, nsecs);
459
460 return 0;
461}
462
463static int dummy_hrtimer_create(struct snd_pcm_substream *substream)
464{
465 struct dummy_hrtimer_pcm *dpcm;
466
467 dpcm = kzalloc(sizeof(*dpcm), GFP_KERNEL);
468 if (!dpcm)
469 return -ENOMEM;
470 substream->runtime->private_data = dpcm;
471 hrtimer_init(&dpcm->timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
472 dpcm->timer.function = dummy_hrtimer_callback;
473 dpcm->substream = substream;
474 atomic_set(&dpcm->running, 0);
475 tasklet_init(&dpcm->tasklet, dummy_hrtimer_pcm_elapsed,
476 (unsigned long)dpcm);
477 return 0;
478}
479
480static void dummy_hrtimer_free(struct snd_pcm_substream *substream)
481{
482 struct dummy_hrtimer_pcm *dpcm = substream->runtime->private_data;
483 dummy_hrtimer_sync(dpcm);
484 kfree(dpcm);
485}
486
487static struct dummy_timer_ops dummy_hrtimer_ops = {
488 .create = dummy_hrtimer_create,
489 .free = dummy_hrtimer_free,
490 .prepare = dummy_hrtimer_prepare,
491 .start = dummy_hrtimer_start,
492 .stop = dummy_hrtimer_stop,
493 .pointer = dummy_hrtimer_pointer,
494};
495
496#endif /* CONFIG_HIGH_RES_TIMERS */
497
498/*
499 * PCM interface
500 */
501
502static int dummy_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
503{
c631d03c
TI		 504 switch (cmd) {
505 case SNDRV_PCM_TRIGGER_START:
506 case SNDRV_PCM_TRIGGER_RESUME:
e063b1a0 507 return get_dummy_ops(substream)->start(substream);
c631d03c
TI		 508 case SNDRV_PCM_TRIGGER_STOP:
509 case SNDRV_PCM_TRIGGER_SUSPEND:
e063b1a0 510 return get_dummy_ops(substream)->stop(substream);
c631d03c
TI		 511 }
512 return -EINVAL;
513}
514
515static int dummy_pcm_prepare(struct snd_pcm_substream *substream)
516{
e063b1a0 517 return get_dummy_ops(substream)->prepare(substream);
c631d03c
TI		 518}
519
520static snd_pcm_uframes_t dummy_pcm_pointer(struct snd_pcm_substream *substream)
521{
e063b1a0 522 return get_dummy_ops(substream)->pointer(substream);
c631d03c
TI		 523}
524
525static struct snd_pcm_hardware dummy_pcm_hardware = {
526 .info = (SNDRV_PCM_INFO_MMAP |
527 SNDRV_PCM_INFO_INTERLEAVED |
528 SNDRV_PCM_INFO_RESUME |
529 SNDRV_PCM_INFO_MMAP_VALID),
1da177e4
LT		 530 .formats = USE_FORMATS,
531 .rates = USE_RATE,
532 .rate_min = USE_RATE_MIN,
533 .rate_max = USE_RATE_MAX,
534 .channels_min = USE_CHANNELS_MIN,
535 .channels_max = USE_CHANNELS_MAX,
536 .buffer_bytes_max = MAX_BUFFER_SIZE,
d5e1ca05 537 .period_bytes_min = MIN_PERIOD_SIZE,
2ad5dd8d 538 .period_bytes_max = MAX_PERIOD_SIZE,
1da177e4
LT		 539 .periods_min = USE_PERIODS_MIN,
540 .periods_max = USE_PERIODS_MAX,
541 .fifo_size = 0,
542};
543
c631d03c
TI		 544static int dummy_pcm_hw_params(struct snd_pcm_substream *substream,
545 struct snd_pcm_hw_params *hw_params)
1da177e4 546{
a68c4d11
TI		 547 if (fake_buffer) {
548 /* runtime->dma_bytes has to be set manually to allow mmap */
549 substream->runtime->dma_bytes = params_buffer_bytes(hw_params);
550 return 0;
551 }
c631d03c
TI		 552 return snd_pcm_lib_malloc_pages(substream,
553 params_buffer_bytes(hw_params));
1da177e4
LT		 554}
555
c631d03c 556static int dummy_pcm_hw_free(struct snd_pcm_substream *substream)
1da177e4 557{
a68c4d11
TI		 558 if (fake_buffer)
559 return 0;
1da177e4
LT		 560 return snd_pcm_lib_free_pages(substream);
561}
562
c631d03c 563static int dummy_pcm_open(struct snd_pcm_substream *substream)
c8eb6ba1 564{
c631d03c 565 struct snd_dummy *dummy = snd_pcm_substream_chip(substream);
d5e1ca05 566 struct dummy_model *model = dummy->model;
4a4d2cfd 567 struct snd_pcm_runtime *runtime = substream->runtime;
e063b1a0 568 const struct dummy_timer_ops *ops;
c8eb6ba1
TI		 569 int err;
570
e063b1a0 571 ops = &dummy_systimer_ops;
c631d03c
TI		 572#ifdef CONFIG_HIGH_RES_TIMERS
573 if (hrtimer)
e063b1a0 574 ops = &dummy_hrtimer_ops;
c631d03c
TI		 575#endif
576
e063b1a0 577 err = ops->create(substream);
1a11cb64 578 if (err < 0)
1da177e4 579 return err;
e063b1a0 580 get_dummy_ops(substream) = ops;
1da177e4 581
d5e1ca05 582 runtime->hw = dummy->pcm_hw;
c631d03c 583 if (substream->pcm->device & 1) {
1da177e4
LT		 584 runtime->hw.info &= ~SNDRV_PCM_INFO_INTERLEAVED;
585 runtime->hw.info |= SNDRV_PCM_INFO_NONINTERLEAVED;
586 }
587 if (substream->pcm->device & 2)
c631d03c
TI		 588 runtime->hw.info &= ~(SNDRV_PCM_INFO_MMAP |
589 SNDRV_PCM_INFO_MMAP_VALID);
590
d5e1ca05
JK		 591 if (model == NULL)
592 return 0;
593
594 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
595 if (model->playback_constraints)
596 err = model->playback_constraints(substream->runtime);
597 } else {
598 if (model->capture_constraints)
599 err = model->capture_constraints(substream->runtime);
600 }
c631d03c 601 if (err < 0) {
e063b1a0 602 get_dummy_ops(substream)->free(substream);
1da177e4 603 return err;
c631d03c 604 }
1da177e4
LT		 605 return 0;
606}
607
c631d03c 608static int dummy_pcm_close(struct snd_pcm_substream *substream)
1da177e4 609{
e063b1a0 610 get_dummy_ops(substream)->free(substream);
1da177e4
LT		 611 return 0;
612}
613
a68c4d11
TI		 614/*
615 * dummy buffer handling
616 */
617
618static void *dummy_page[2];
619
620static void free_fake_buffer(void)
621{
622 if (fake_buffer) {
623 int i;
624 for (i = 0; i < 2; i++)
625 if (dummy_page[i]) {
626 free_page((unsigned long)dummy_page[i]);
627 dummy_page[i] = NULL;
628 }
629 }
630}
631
632static int alloc_fake_buffer(void)
633{
634 int i;
635
636 if (!fake_buffer)
637 return 0;
638 for (i = 0; i < 2; i++) {
639 dummy_page[i] = (void *)get_zeroed_page(GFP_KERNEL);
640 if (!dummy_page[i]) {
641 free_fake_buffer();
642 return -ENOMEM;
643 }
644 }
645 return 0;
646}
647
648static int dummy_pcm_copy(struct snd_pcm_substream *substream,
649 int channel, snd_pcm_uframes_t pos,
650 void __user *dst, snd_pcm_uframes_t count)
651{
652 return 0; /* do nothing */
653}
654
655static int dummy_pcm_silence(struct snd_pcm_substream *substream,
656 int channel, snd_pcm_uframes_t pos,
657 snd_pcm_uframes_t count)
658{
659 return 0; /* do nothing */
660}
661
662static struct page *dummy_pcm_page(struct snd_pcm_substream *substream,
663 unsigned long offset)
664{
665 return virt_to_page(dummy_page[substream->stream]); /* the same page */
666}
667
c631d03c
TI		 668static struct snd_pcm_ops dummy_pcm_ops = {
669 .open = dummy_pcm_open,
670 .close = dummy_pcm_close,
671 .ioctl = snd_pcm_lib_ioctl,
672 .hw_params = dummy_pcm_hw_params,
673 .hw_free = dummy_pcm_hw_free,
674 .prepare = dummy_pcm_prepare,
675 .trigger = dummy_pcm_trigger,
676 .pointer = dummy_pcm_pointer,
1da177e4
LT		 677};
678
a68c4d11
TI		 679static struct snd_pcm_ops dummy_pcm_ops_no_buf = {
680 .open = dummy_pcm_open,
681 .close = dummy_pcm_close,
682 .ioctl = snd_pcm_lib_ioctl,
683 .hw_params = dummy_pcm_hw_params,
684 .hw_free = dummy_pcm_hw_free,
685 .prepare = dummy_pcm_prepare,
686 .trigger = dummy_pcm_trigger,
687 .pointer = dummy_pcm_pointer,
688 .copy = dummy_pcm_copy,
689 .silence = dummy_pcm_silence,
690 .page = dummy_pcm_page,
691};
692
fbbb01a1
BP		 693static int snd_card_dummy_pcm(struct snd_dummy *dummy, int device,
694 int substreams)
1da177e4 695{
4a4d2cfd 696 struct snd_pcm *pcm;
a68c4d11 697 struct snd_pcm_ops *ops;
1da177e4
LT		 698 int err;
699
1a11cb64
JK		 700 err = snd_pcm_new(dummy->card, "Dummy PCM", device,
701 substreams, substreams, &pcm);
702 if (err < 0)
1da177e4 703 return err;
6e65c1cc 704 dummy->pcm = pcm;
a68c4d11
TI		 705 if (fake_buffer)
706 ops = &dummy_pcm_ops_no_buf;
707 else
708 ops = &dummy_pcm_ops;
709 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, ops);
710 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, ops);
1da177e4
LT		 711 pcm->private_data = dummy;
712 pcm->info_flags = 0;
713 strcpy(pcm->name, "Dummy PCM");
a68c4d11
TI		 714 if (!fake_buffer) {
715 snd_pcm_lib_preallocate_pages_for_all(pcm,
716 SNDRV_DMA_TYPE_CONTINUOUS,
717 snd_dma_continuous_data(GFP_KERNEL),
718 0, 64*1024);
719 }
1da177e4
LT		 720 return 0;
721}
722
9b151fec
TI		 723/*
724 * mixer interface
725 */
726
1da177e4 727#define DUMMY_VOLUME(xname, xindex, addr) \
fb567a8e
TI		 728{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, \
729 .access = SNDRV_CTL_ELEM_ACCESS_READWRITE | SNDRV_CTL_ELEM_ACCESS_TLV_READ, \
730 .name = xname, .index = xindex, \
1da177e4
LT		 731 .info = snd_dummy_volume_info, \
732 .get = snd_dummy_volume_get, .put = snd_dummy_volume_put, \
fb567a8e
TI		 733 .private_value = addr, \
734 .tlv = { .p = db_scale_dummy } }
1da177e4 735
4a4d2cfd
TI		 736static int snd_dummy_volume_info(struct snd_kcontrol *kcontrol,
737 struct snd_ctl_elem_info *uinfo)
1da177e4
LT		 738{
739 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
740 uinfo->count = 2;
741 uinfo->value.integer.min = -50;
742 uinfo->value.integer.max = 100;
743 return 0;
744}
745
4a4d2cfd
TI		 746static int snd_dummy_volume_get(struct snd_kcontrol *kcontrol,
747 struct snd_ctl_elem_value *ucontrol)
1da177e4 748{
4a4d2cfd 749 struct snd_dummy *dummy = snd_kcontrol_chip(kcontrol);
1da177e4
LT		 750 int addr = kcontrol->private_value;
751
c8eb6ba1 752 spin_lock_irq(&dummy->mixer_lock);
1da177e4
LT		 753 ucontrol->value.integer.value[0] = dummy->mixer_volume[addr][0];
754 ucontrol->value.integer.value[1] = dummy->mixer_volume[addr][1];
c8eb6ba1 755 spin_unlock_irq(&dummy->mixer_lock);
1da177e4
LT		 756 return 0;
757}
758
4a4d2cfd
TI		 759static int snd_dummy_volume_put(struct snd_kcontrol *kcontrol,
760 struct snd_ctl_elem_value *ucontrol)
1da177e4 761{
4a4d2cfd 762 struct snd_dummy *dummy = snd_kcontrol_chip(kcontrol);
1da177e4
LT		 763 int change, addr = kcontrol->private_value;
764 int left, right;
765
766 left = ucontrol->value.integer.value[0];
767 if (left < -50)
768 left = -50;
769 if (left > 100)
770 left = 100;
771 right = ucontrol->value.integer.value[1];
772 if (right < -50)
773 right = -50;
774 if (right > 100)
775 right = 100;
c8eb6ba1 776 spin_lock_irq(&dummy->mixer_lock);
1da177e4
LT		 777 change = dummy->mixer_volume[addr][0] != left ||
778 dummy->mixer_volume[addr][1] != right;
779 dummy->mixer_volume[addr][0] = left;
780 dummy->mixer_volume[addr][1] = right;
c8eb6ba1 781 spin_unlock_irq(&dummy->mixer_lock);
1da177e4
LT		 782 return change;
783}
784
0cb29ea0 785static const DECLARE_TLV_DB_SCALE(db_scale_dummy, -4500, 30, 0);
fb567a8e 786
1da177e4
LT		 787#define DUMMY_CAPSRC(xname, xindex, addr) \
788{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
789 .info = snd_dummy_capsrc_info, \
790 .get = snd_dummy_capsrc_get, .put = snd_dummy_capsrc_put, \
791 .private_value = addr }
792
a5ce8890 793#define snd_dummy_capsrc_info snd_ctl_boolean_stereo_info
1da177e4 794
4a4d2cfd
TI		 795static int snd_dummy_capsrc_get(struct snd_kcontrol *kcontrol,
796 struct snd_ctl_elem_value *ucontrol)
1da177e4 797{
4a4d2cfd 798 struct snd_dummy *dummy = snd_kcontrol_chip(kcontrol);
1da177e4
LT		 799 int addr = kcontrol->private_value;
800
c8eb6ba1 801 spin_lock_irq(&dummy->mixer_lock);
1da177e4
LT		 802 ucontrol->value.integer.value[0] = dummy->capture_source[addr][0];
803 ucontrol->value.integer.value[1] = dummy->capture_source[addr][1];
c8eb6ba1 804 spin_unlock_irq(&dummy->mixer_lock);
1da177e4
LT		 805 return 0;
806}
807
4a4d2cfd 808static int snd_dummy_capsrc_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
1da177e4 809{
4a4d2cfd 810 struct snd_dummy *dummy = snd_kcontrol_chip(kcontrol);
1da177e4
LT		 811 int change, addr = kcontrol->private_value;
812 int left, right;
813
814 left = ucontrol->value.integer.value[0] & 1;
815 right = ucontrol->value.integer.value[1] & 1;
c8eb6ba1 816 spin_lock_irq(&dummy->mixer_lock);
1da177e4
LT		 817 change = dummy->capture_source[addr][0] != left &&
818 dummy->capture_source[addr][1] != right;
819 dummy->capture_source[addr][0] = left;
820 dummy->capture_source[addr][1] = right;
c8eb6ba1 821 spin_unlock_irq(&dummy->mixer_lock);
1da177e4
LT		 822 return change;
823}
824
16e43467
CL		 825static int snd_dummy_iobox_info(struct snd_kcontrol *kcontrol,
826 struct snd_ctl_elem_info *info)
827{
828 const char *const names[] = { "None", "CD Player" };
829
830 return snd_ctl_enum_info(info, 1, 2, names);
831}
832
833static int snd_dummy_iobox_get(struct snd_kcontrol *kcontrol,
834 struct snd_ctl_elem_value *value)
835{
836 struct snd_dummy *dummy = snd_kcontrol_chip(kcontrol);
837
838 value->value.enumerated.item[0] = dummy->iobox;
839 return 0;
840}
841
842static int snd_dummy_iobox_put(struct snd_kcontrol *kcontrol,
843 struct snd_ctl_elem_value *value)
844{
845 struct snd_dummy *dummy = snd_kcontrol_chip(kcontrol);
846 int changed;
847
848 if (value->value.enumerated.item[0] > 1)
849 return -EINVAL;
850
851 changed = value->value.enumerated.item[0] != dummy->iobox;
852 if (changed) {
853 dummy->iobox = value->value.enumerated.item[0];
854
855 if (dummy->iobox) {
856 dummy->cd_volume_ctl->vd[0].access &=
857 ~SNDRV_CTL_ELEM_ACCESS_INACTIVE;
858 dummy->cd_switch_ctl->vd[0].access &=
859 ~SNDRV_CTL_ELEM_ACCESS_INACTIVE;
860 } else {
861 dummy->cd_volume_ctl->vd[0].access |=
862 SNDRV_CTL_ELEM_ACCESS_INACTIVE;
863 dummy->cd_switch_ctl->vd[0].access |=
864 SNDRV_CTL_ELEM_ACCESS_INACTIVE;
865 }
866
867 snd_ctl_notify(dummy->card, SNDRV_CTL_EVENT_MASK_INFO,
868 &dummy->cd_volume_ctl->id);
869 snd_ctl_notify(dummy->card, SNDRV_CTL_EVENT_MASK_INFO,
870 &dummy->cd_switch_ctl->id);
871 }
872
873 return changed;
874}
875
4a4d2cfd 876static struct snd_kcontrol_new snd_dummy_controls[] = {
1da177e4
LT		 877DUMMY_VOLUME("Master Volume", 0, MIXER_ADDR_MASTER),
878DUMMY_CAPSRC("Master Capture Switch", 0, MIXER_ADDR_MASTER),
879DUMMY_VOLUME("Synth Volume", 0, MIXER_ADDR_SYNTH),
e05d6964 880DUMMY_CAPSRC("Synth Capture Switch", 0, MIXER_ADDR_SYNTH),
1da177e4 881DUMMY_VOLUME("Line Volume", 0, MIXER_ADDR_LINE),
e05d6964 882DUMMY_CAPSRC("Line Capture Switch", 0, MIXER_ADDR_LINE),
1da177e4 883DUMMY_VOLUME("Mic Volume", 0, MIXER_ADDR_MIC),
e05d6964 884DUMMY_CAPSRC("Mic Capture Switch", 0, MIXER_ADDR_MIC),
1da177e4 885DUMMY_VOLUME("CD Volume", 0, MIXER_ADDR_CD),
16e43467
CL		 886DUMMY_CAPSRC("CD Capture Switch", 0, MIXER_ADDR_CD),
887{
888 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
889 .name = "External I/O Box",
890 .info = snd_dummy_iobox_info,
891 .get = snd_dummy_iobox_get,
892 .put = snd_dummy_iobox_put,
893},
1da177e4
LT		 894};
895
fbbb01a1 896static int snd_card_dummy_new_mixer(struct snd_dummy *dummy)
1da177e4 897{
4a4d2cfd 898 struct snd_card *card = dummy->card;
16e43467 899 struct snd_kcontrol *kcontrol;
1da177e4
LT		 900 unsigned int idx;
901 int err;
902
1da177e4
LT		 903 spin_lock_init(&dummy->mixer_lock);
904 strcpy(card->mixername, "Dummy Mixer");
16e43467 905 dummy->iobox = 1;
1da177e4
LT		 906
907 for (idx = 0; idx < ARRAY_SIZE(snd_dummy_controls); idx++) {
16e43467
CL		 908 kcontrol = snd_ctl_new1(&snd_dummy_controls[idx], dummy);
909 err = snd_ctl_add(card, kcontrol);
1a11cb64 910 if (err < 0)
1da177e4 911 return err;
16e43467
CL		 912 if (!strcmp(kcontrol->id.name, "CD Volume"))
913 dummy->cd_volume_ctl = kcontrol;
914 else if (!strcmp(kcontrol->id.name, "CD Capture Switch"))
915 dummy->cd_switch_ctl = kcontrol;
916
1da177e4
LT		 917 }
918 return 0;
919}
920
9b151fec
TI		 921#if defined(CONFIG_SND_DEBUG) && defined(CONFIG_PROC_FS)
922/*
923 * proc interface
924 */
d5e1ca05
JK		 925static void print_formats(struct snd_dummy *dummy,
926 struct snd_info_buffer *buffer)
9b151fec
TI		 927{
928 int i;
929
930 for (i = 0; i < SNDRV_PCM_FORMAT_LAST; i++) {
d5e1ca05 931 if (dummy->pcm_hw.formats & (1ULL << i))
9b151fec
TI		 932 snd_iprintf(buffer, " %s", snd_pcm_format_name(i));
933 }
934}
935
d5e1ca05
JK		 936static void print_rates(struct snd_dummy *dummy,
937 struct snd_info_buffer *buffer)
9b151fec
TI		 938{
939 static int rates[] = {
940 5512, 8000, 11025, 16000, 22050, 32000, 44100, 48000,
941 64000, 88200, 96000, 176400, 192000,
942 };
943 int i;
944
d5e1ca05 945 if (dummy->pcm_hw.rates & SNDRV_PCM_RATE_CONTINUOUS)
9b151fec 946 snd_iprintf(buffer, " continuous");
d5e1ca05 947 if (dummy->pcm_hw.rates & SNDRV_PCM_RATE_KNOT)
9b151fec
TI		 948 snd_iprintf(buffer, " knot");
949 for (i = 0; i < ARRAY_SIZE(rates); i++)
d5e1ca05 950 if (dummy->pcm_hw.rates & (1 << i))
9b151fec
TI		 951 snd_iprintf(buffer, " %d", rates[i]);
952}
953
d5e1ca05
JK		 954#define get_dummy_int_ptr(dummy, ofs) \
955 (unsigned int *)((char *)&((dummy)->pcm_hw) + (ofs))
956#define get_dummy_ll_ptr(dummy, ofs) \
957 (unsigned long long *)((char *)&((dummy)->pcm_hw) + (ofs))
9b151fec
TI		 958
959struct dummy_hw_field {
960 const char *name;
961 const char *format;
962 unsigned int offset;
963 unsigned int size;
964};
965#define FIELD_ENTRY(item, fmt) { \
966 .name = #item, \
967 .format = fmt, \
968 .offset = offsetof(struct snd_pcm_hardware, item), \
969 .size = sizeof(dummy_pcm_hardware.item) }
970
971static struct dummy_hw_field fields[] = {
972 FIELD_ENTRY(formats, "%#llx"),
973 FIELD_ENTRY(rates, "%#x"),
974 FIELD_ENTRY(rate_min, "%d"),
975 FIELD_ENTRY(rate_max, "%d"),
976 FIELD_ENTRY(channels_min, "%d"),
977 FIELD_ENTRY(channels_max, "%d"),
978 FIELD_ENTRY(buffer_bytes_max, "%ld"),
979 FIELD_ENTRY(period_bytes_min, "%ld"),
980 FIELD_ENTRY(period_bytes_max, "%ld"),
981 FIELD_ENTRY(periods_min, "%d"),
982 FIELD_ENTRY(periods_max, "%d"),
983};
984
985static void dummy_proc_read(struct snd_info_entry *entry,
986 struct snd_info_buffer *buffer)
987{
d5e1ca05 988 struct snd_dummy *dummy = entry->private_data;
9b151fec
TI		 989 int i;
990
991 for (i = 0; i < ARRAY_SIZE(fields); i++) {
992 snd_iprintf(buffer, "%s ", fields[i].name);
993 if (fields[i].size == sizeof(int))
994 snd_iprintf(buffer, fields[i].format,
d5e1ca05 995 *get_dummy_int_ptr(dummy, fields[i].offset));
9b151fec
TI		 996 else
997 snd_iprintf(buffer, fields[i].format,
d5e1ca05 998 *get_dummy_ll_ptr(dummy, fields[i].offset));
9b151fec 999 if (!strcmp(fields[i].name, "formats"))
d5e1ca05 1000 print_formats(dummy, buffer);
9b151fec 1001 else if (!strcmp(fields[i].name, "rates"))
d5e1ca05 1002 print_rates(dummy, buffer);
9b151fec
TI		 1003 snd_iprintf(buffer, "\n");
1004 }
1005}
1006
1007static void dummy_proc_write(struct snd_info_entry *entry,
1008 struct snd_info_buffer *buffer)
1009{
d5e1ca05 1010 struct snd_dummy *dummy = entry->private_data;
9b151fec
TI		 1011 char line[64];
1012
1013 while (!snd_info_get_line(buffer, line, sizeof(line))) {
1014 char item[20];
1015 const char *ptr;
1016 unsigned long long val;
1017 int i;
1018
1019 ptr = snd_info_get_str(item, line, sizeof(item));
1020 for (i = 0; i < ARRAY_SIZE(fields); i++) {
1021 if (!strcmp(item, fields[i].name))
1022 break;
1023 }
1024 if (i >= ARRAY_SIZE(fields))
1025 continue;
1026 snd_info_get_str(item, ptr, sizeof(item));
1027 if (strict_strtoull(item, 0, &val))
1028 continue;
1029 if (fields[i].size == sizeof(int))
d5e1ca05 1030 *get_dummy_int_ptr(dummy, fields[i].offset) = val;
9b151fec 1031 else
d5e1ca05 1032 *get_dummy_ll_ptr(dummy, fields[i].offset) = val;
9b151fec
TI		 1033 }
1034}
1035
fbbb01a1 1036static void dummy_proc_init(struct snd_dummy *chip)
9b151fec
TI		 1037{
1038 struct snd_info_entry *entry;
1039
1040 if (!snd_card_proc_new(chip->card, "dummy_pcm", &entry)) {
1041 snd_info_set_text_ops(entry, chip, dummy_proc_read);
1042 entry->c.text.write = dummy_proc_write;
1043 entry->mode |= S_IWUSR;
d5e1ca05 1044 entry->private_data = chip;
9b151fec
TI		 1045 }
1046}
1047#else
1048#define dummy_proc_init(x)
1049#endif /* CONFIG_SND_DEBUG && CONFIG_PROC_FS */
1050
fbbb01a1 1051static int snd_dummy_probe(struct platform_device *devptr)
1da177e4 1052{
4a4d2cfd
TI		 1053 struct snd_card *card;
1054 struct snd_dummy *dummy;
d5e1ca05 1055 struct dummy_model *m = NULL, **mdl;
1da177e4 1056 int idx, err;
6e65c1cc 1057 int dev = devptr->id;
1da177e4 1058
bd7dd77c
TI		 1059 err = snd_card_create(index[dev], id[dev], THIS_MODULE,
1060 sizeof(struct snd_dummy), &card);
1061 if (err < 0)
1062 return err;
4a4d2cfd 1063 dummy = card->private_data;
1da177e4 1064 dummy->card = card;
d5e1ca05
JK		 1065 for (mdl = dummy_models; *mdl && model[dev]; mdl++) {
1066 if (strcmp(model[dev], (*mdl)->name) == 0) {
1067 printk(KERN_INFO
1068 "snd-dummy: Using model '%s' for card %i\n",
1069 (*mdl)->name, card->number);
1070 m = dummy->model = *mdl;
1071 break;
1072 }
1073 }
1da177e4
LT		 1074 for (idx = 0; idx < MAX_PCM_DEVICES && idx < pcm_devs[dev]; idx++) {
1075 if (pcm_substreams[dev] < 1)
1076 pcm_substreams[dev] = 1;
1077 if (pcm_substreams[dev] > MAX_PCM_SUBSTREAMS)
1078 pcm_substreams[dev] = MAX_PCM_SUBSTREAMS;
1a11cb64
JK		 1079 err = snd_card_dummy_pcm(dummy, idx, pcm_substreams[dev]);
1080 if (err < 0)
1da177e4
LT		 1081 goto __nodev;
1082 }
d5e1ca05
JK		 1083
1084 dummy->pcm_hw = dummy_pcm_hardware;
1085 if (m) {
1086 if (m->formats)
1087 dummy->pcm_hw.formats = m->formats;
1088 if (m->buffer_bytes_max)
1089 dummy->pcm_hw.buffer_bytes_max = m->buffer_bytes_max;
1090 if (m->period_bytes_min)
1091 dummy->pcm_hw.period_bytes_min = m->period_bytes_min;
1092 if (m->period_bytes_max)
1093 dummy->pcm_hw.period_bytes_max = m->period_bytes_max;
1094 if (m->periods_min)
1095 dummy->pcm_hw.periods_min = m->periods_min;
1096 if (m->periods_max)
1097 dummy->pcm_hw.periods_max = m->periods_max;
1098 if (m->rates)
1099 dummy->pcm_hw.rates = m->rates;
1100 if (m->rate_min)
1101 dummy->pcm_hw.rate_min = m->rate_min;
1102 if (m->rate_max)
1103 dummy->pcm_hw.rate_max = m->rate_max;
1104 if (m->channels_min)
1105 dummy->pcm_hw.channels_min = m->channels_min;
1106 if (m->channels_max)
1107 dummy->pcm_hw.channels_max = m->channels_max;
1108 }
1109
1a11cb64
JK		 1110 err = snd_card_dummy_new_mixer(dummy);
1111 if (err < 0)
1da177e4
LT		 1112 goto __nodev;
1113 strcpy(card->driver, "Dummy");
1114 strcpy(card->shortname, "Dummy");
1115 sprintf(card->longname, "Dummy %i", dev + 1);
16dab54b 1116
9b151fec
TI		 1117 dummy_proc_init(dummy);
1118
6e65c1cc 1119 snd_card_set_dev(card, &devptr->dev);
16dab54b 1120
1a11cb64
JK		 1121 err = snd_card_register(card);
1122 if (err == 0) {
6e65c1cc 1123 platform_set_drvdata(devptr, card);
1da177e4
LT		 1124 return 0;
1125 }
1126 __nodev:
1127 snd_card_free(card);
1128 return err;
1129}
1130
fbbb01a1 1131static int snd_dummy_remove(struct platform_device *devptr)
6e65c1cc
TI		 1132{
1133 snd_card_free(platform_get_drvdata(devptr));
1134 platform_set_drvdata(devptr, NULL);
1135 return 0;
1136}
1137
d34e4e00 1138#ifdef CONFIG_PM_SLEEP
284e7ca7 1139static int snd_dummy_suspend(struct device *pdev)
1da177e4 1140{
284e7ca7 1141 struct snd_card *card = dev_get_drvdata(pdev);
6e65c1cc 1142 struct snd_dummy *dummy = card->private_data;
1da177e4 1143
6e65c1cc
TI		 1144 snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
1145 snd_pcm_suspend_all(dummy->pcm);
1146 return 0;
1147}
1148
284e7ca7 1149static int snd_dummy_resume(struct device *pdev)
6e65c1cc 1150{
284e7ca7 1151 struct snd_card *card = dev_get_drvdata(pdev);
6e65c1cc
TI		 1152
1153 snd_power_change_state(card, SNDRV_CTL_POWER_D0);
1154 return 0;
1155}
284e7ca7
TI		 1156
1157static SIMPLE_DEV_PM_OPS(snd_dummy_pm, snd_dummy_suspend, snd_dummy_resume);
1158#define SND_DUMMY_PM_OPS &snd_dummy_pm
1159#else
1160#define SND_DUMMY_PM_OPS NULL
6e65c1cc
TI		 1161#endif
1162
1163#define SND_DUMMY_DRIVER "snd_dummy"
1164
1165static struct platform_driver snd_dummy_driver = {
1166 .probe = snd_dummy_probe,
fbbb01a1 1167 .remove = snd_dummy_remove,
6e65c1cc 1168 .driver = {
8bf01d8a
TI		 1169 .name = SND_DUMMY_DRIVER,
1170 .owner = THIS_MODULE,
284e7ca7 1171 .pm = SND_DUMMY_PM_OPS,
6e65c1cc
TI		 1172 },
1173};
1174
c12aad6e 1175static void snd_dummy_unregister_all(void)
f7a9275d
CL		 1176{
1177 int i;
1178
1179 for (i = 0; i < ARRAY_SIZE(devices); ++i)
1180 platform_device_unregister(devices[i]);
1181 platform_driver_unregister(&snd_dummy_driver);
a68c4d11 1182 free_fake_buffer();
f7a9275d
CL		 1183}
1184
6e65c1cc
TI		 1185static int __init alsa_card_dummy_init(void)
1186{
1187 int i, cards, err;
1188
1a11cb64
JK		 1189 err = platform_driver_register(&snd_dummy_driver);
1190 if (err < 0)
6e65c1cc
TI		 1191 return err;
1192
a68c4d11
TI		 1193 err = alloc_fake_buffer();
1194 if (err < 0) {
1195 platform_driver_unregister(&snd_dummy_driver);
1196 return err;
1197 }
1198
6e65c1cc 1199 cards = 0;
8278ca8f 1200 for (i = 0; i < SNDRV_CARDS; i++) {
6e65c1cc 1201 struct platform_device *device;
8278ca8f
TI		 1202 if (! enable[i])
1203 continue;
6e65c1cc
TI		 1204 device = platform_device_register_simple(SND_DUMMY_DRIVER,
1205 i, NULL, 0);
a182ee98
RH		 1206 if (IS_ERR(device))
1207 continue;
7152447d
RH		 1208 if (!platform_get_drvdata(device)) {
1209 platform_device_unregister(device);
1210 continue;
1211 }
f7a9275d 1212 devices[i] = device;
1da177e4
LT		 1213 cards++;
1214 }
1215 if (!cards) {
1216#ifdef MODULE
1217 printk(KERN_ERR "Dummy soundcard not found or device busy\n");
1218#endif
a182ee98
RH		 1219 snd_dummy_unregister_all();
1220 return -ENODEV;
1da177e4
LT		 1221 }
1222 return 0;
1223}
1224
1225static void __exit alsa_card_dummy_exit(void)
1226{
f7a9275d 1227 snd_dummy_unregister_all();
1da177e4
LT		 1228}
1229
1230module_init(alsa_card_dummy_init)
1231module_exit(alsa_card_dummy_exit)
kernel source for telekom puls (alcatel/mediatek)