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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 | |
a68c4d11 | 156 | static int fake_buffer = 1; |
1da177e4 LT |
157 | |
158 | module_param_array(index, int, NULL, 0444); | |
159 | MODULE_PARM_DESC(index, "Index value for dummy soundcard."); | |
160 | module_param_array(id, charp, NULL, 0444); | |
161 | MODULE_PARM_DESC(id, "ID string for dummy soundcard."); | |
162 | module_param_array(enable, bool, NULL, 0444); | |
163 | MODULE_PARM_DESC(enable, "Enable this dummy soundcard."); | |
164 | module_param_array(pcm_devs, int, NULL, 0444); | |
165 | MODULE_PARM_DESC(pcm_devs, "PCM devices # (0-4) for dummy driver."); | |
166 | module_param_array(pcm_substreams, int, NULL, 0444); | |
167 | MODULE_PARM_DESC(pcm_substreams, "PCM substreams # (1-16) for dummy driver."); | |
168 | //module_param_array(midi_devs, int, NULL, 0444); | |
169 | //MODULE_PARM_DESC(midi_devs, "MIDI devices # (0-2) for dummy driver."); | |
a68c4d11 TI |
170 | module_param(fake_buffer, bool, 0444); |
171 | MODULE_PARM_DESC(fake_buffer, "Fake buffer allocations."); | |
c631d03c TI |
172 | #ifdef CONFIG_HIGH_RES_TIMERS |
173 | module_param(hrtimer, bool, 0644); | |
174 | MODULE_PARM_DESC(hrtimer, "Use hrtimer as the timer source."); | |
175 | #endif | |
1da177e4 | 176 | |
f7a9275d CL |
177 | static struct platform_device *devices[SNDRV_CARDS]; |
178 | ||
1da177e4 LT |
179 | #define MIXER_ADDR_MASTER 0 |
180 | #define MIXER_ADDR_LINE 1 | |
181 | #define MIXER_ADDR_MIC 2 | |
182 | #define MIXER_ADDR_SYNTH 3 | |
183 | #define MIXER_ADDR_CD 4 | |
184 | #define MIXER_ADDR_LAST 4 | |
185 | ||
c631d03c TI |
186 | struct dummy_timer_ops { |
187 | int (*create)(struct snd_pcm_substream *); | |
188 | void (*free)(struct snd_pcm_substream *); | |
189 | int (*prepare)(struct snd_pcm_substream *); | |
190 | int (*start)(struct snd_pcm_substream *); | |
191 | int (*stop)(struct snd_pcm_substream *); | |
192 | snd_pcm_uframes_t (*pointer)(struct snd_pcm_substream *); | |
193 | }; | |
194 | ||
4a4d2cfd TI |
195 | struct snd_dummy { |
196 | struct snd_card *card; | |
6e65c1cc | 197 | struct snd_pcm *pcm; |
1da177e4 LT |
198 | spinlock_t mixer_lock; |
199 | int mixer_volume[MIXER_ADDR_LAST+1][2]; | |
200 | int capture_source[MIXER_ADDR_LAST+1][2]; | |
c631d03c | 201 | const struct dummy_timer_ops *timer_ops; |
4a4d2cfd | 202 | }; |
1da177e4 | 203 | |
c631d03c TI |
204 | /* |
205 | * system timer interface | |
206 | */ | |
207 | ||
208 | struct dummy_systimer_pcm { | |
1da177e4 LT |
209 | spinlock_t lock; |
210 | struct timer_list timer; | |
b142037b TI |
211 | unsigned long base_time; |
212 | unsigned int frac_pos; /* fractional sample position (based HZ) */ | |
b5d10781 | 213 | unsigned int frac_period_rest; |
b142037b TI |
214 | unsigned int frac_buffer_size; /* buffer_size * HZ */ |
215 | unsigned int frac_period_size; /* period_size * HZ */ | |
216 | unsigned int rate; | |
b5d10781 | 217 | int elapsed; |
4a4d2cfd TI |
218 | struct snd_pcm_substream *substream; |
219 | }; | |
1da177e4 | 220 | |
b142037b TI |
221 | static void dummy_systimer_rearm(struct dummy_systimer_pcm *dpcm) |
222 | { | |
b142037b | 223 | dpcm->timer.expires = jiffies + |
b5d10781 | 224 | (dpcm->frac_period_rest + dpcm->rate - 1) / dpcm->rate; |
b142037b TI |
225 | add_timer(&dpcm->timer); |
226 | } | |
227 | ||
228 | static void dummy_systimer_update(struct dummy_systimer_pcm *dpcm) | |
229 | { | |
230 | unsigned long delta; | |
231 | ||
232 | delta = jiffies - dpcm->base_time; | |
233 | if (!delta) | |
234 | return; | |
b5d10781 TI |
235 | dpcm->base_time += delta; |
236 | delta *= dpcm->rate; | |
237 | dpcm->frac_pos += delta; | |
b142037b TI |
238 | while (dpcm->frac_pos >= dpcm->frac_buffer_size) |
239 | dpcm->frac_pos -= dpcm->frac_buffer_size; | |
b5d10781 TI |
240 | while (dpcm->frac_period_rest <= delta) { |
241 | dpcm->elapsed++; | |
242 | dpcm->frac_period_rest += dpcm->frac_period_size; | |
243 | } | |
244 | dpcm->frac_period_rest -= delta; | |
b142037b TI |
245 | } |
246 | ||
c631d03c | 247 | static int dummy_systimer_start(struct snd_pcm_substream *substream) |
1da177e4 | 248 | { |
c631d03c TI |
249 | struct dummy_systimer_pcm *dpcm = substream->runtime->private_data; |
250 | spin_lock(&dpcm->lock); | |
b142037b TI |
251 | dpcm->base_time = jiffies; |
252 | dummy_systimer_rearm(dpcm); | |
c631d03c TI |
253 | spin_unlock(&dpcm->lock); |
254 | return 0; | |
1da177e4 LT |
255 | } |
256 | ||
c631d03c | 257 | static int dummy_systimer_stop(struct snd_pcm_substream *substream) |
1da177e4 | 258 | { |
c631d03c | 259 | struct dummy_systimer_pcm *dpcm = substream->runtime->private_data; |
c8eb6ba1 | 260 | spin_lock(&dpcm->lock); |
c631d03c | 261 | del_timer(&dpcm->timer); |
c8eb6ba1 | 262 | spin_unlock(&dpcm->lock); |
6e65c1cc | 263 | return 0; |
1da177e4 LT |
264 | } |
265 | ||
c631d03c | 266 | static int dummy_systimer_prepare(struct snd_pcm_substream *substream) |
1da177e4 | 267 | { |
4a4d2cfd | 268 | struct snd_pcm_runtime *runtime = substream->runtime; |
c631d03c | 269 | struct dummy_systimer_pcm *dpcm = runtime->private_data; |
369b240d | 270 | |
b142037b TI |
271 | dpcm->frac_pos = 0; |
272 | dpcm->rate = runtime->rate; | |
273 | dpcm->frac_buffer_size = runtime->buffer_size * HZ; | |
274 | dpcm->frac_period_size = runtime->period_size * HZ; | |
b5d10781 TI |
275 | dpcm->frac_period_rest = dpcm->frac_period_size; |
276 | dpcm->elapsed = 0; | |
53463a83 | 277 | |
1da177e4 LT |
278 | return 0; |
279 | } | |
280 | ||
c631d03c | 281 | static void dummy_systimer_callback(unsigned long data) |
1da177e4 | 282 | { |
c631d03c | 283 | struct dummy_systimer_pcm *dpcm = (struct dummy_systimer_pcm *)data; |
b32425ac | 284 | unsigned long flags; |
b5d10781 | 285 | int elapsed = 0; |
1da177e4 | 286 | |
b32425ac | 287 | spin_lock_irqsave(&dpcm->lock, flags); |
b142037b TI |
288 | dummy_systimer_update(dpcm); |
289 | dummy_systimer_rearm(dpcm); | |
b5d10781 TI |
290 | elapsed = dpcm->elapsed; |
291 | dpcm->elapsed = 0; | |
b142037b | 292 | spin_unlock_irqrestore(&dpcm->lock, flags); |
b5d10781 TI |
293 | if (elapsed) |
294 | snd_pcm_period_elapsed(dpcm->substream); | |
1da177e4 LT |
295 | } |
296 | ||
c631d03c TI |
297 | static snd_pcm_uframes_t |
298 | dummy_systimer_pointer(struct snd_pcm_substream *substream) | |
1da177e4 | 299 | { |
b142037b | 300 | struct dummy_systimer_pcm *dpcm = substream->runtime->private_data; |
b5d10781 | 301 | snd_pcm_uframes_t pos; |
1da177e4 | 302 | |
b142037b TI |
303 | spin_lock(&dpcm->lock); |
304 | dummy_systimer_update(dpcm); | |
b5d10781 | 305 | pos = dpcm->frac_pos / HZ; |
b142037b | 306 | spin_unlock(&dpcm->lock); |
b5d10781 | 307 | return pos; |
1da177e4 LT |
308 | } |
309 | ||
c631d03c | 310 | static int dummy_systimer_create(struct snd_pcm_substream *substream) |
1da177e4 | 311 | { |
c631d03c TI |
312 | struct dummy_systimer_pcm *dpcm; |
313 | ||
314 | dpcm = kzalloc(sizeof(*dpcm), GFP_KERNEL); | |
315 | if (!dpcm) | |
316 | return -ENOMEM; | |
317 | substream->runtime->private_data = dpcm; | |
318 | init_timer(&dpcm->timer); | |
319 | dpcm->timer.data = (unsigned long) dpcm; | |
320 | dpcm->timer.function = dummy_systimer_callback; | |
321 | spin_lock_init(&dpcm->lock); | |
322 | dpcm->substream = substream; | |
323 | return 0; | |
324 | } | |
325 | ||
326 | static void dummy_systimer_free(struct snd_pcm_substream *substream) | |
327 | { | |
328 | kfree(substream->runtime->private_data); | |
329 | } | |
330 | ||
331 | static struct dummy_timer_ops dummy_systimer_ops = { | |
332 | .create = dummy_systimer_create, | |
333 | .free = dummy_systimer_free, | |
334 | .prepare = dummy_systimer_prepare, | |
335 | .start = dummy_systimer_start, | |
336 | .stop = dummy_systimer_stop, | |
337 | .pointer = dummy_systimer_pointer, | |
1da177e4 LT |
338 | }; |
339 | ||
c631d03c TI |
340 | #ifdef CONFIG_HIGH_RES_TIMERS |
341 | /* | |
342 | * hrtimer interface | |
343 | */ | |
344 | ||
345 | struct dummy_hrtimer_pcm { | |
346 | ktime_t base_time; | |
347 | ktime_t period_time; | |
348 | atomic_t running; | |
349 | struct hrtimer timer; | |
350 | struct tasklet_struct tasklet; | |
351 | struct snd_pcm_substream *substream; | |
352 | }; | |
353 | ||
354 | static void dummy_hrtimer_pcm_elapsed(unsigned long priv) | |
355 | { | |
356 | struct dummy_hrtimer_pcm *dpcm = (struct dummy_hrtimer_pcm *)priv; | |
357 | if (atomic_read(&dpcm->running)) | |
358 | snd_pcm_period_elapsed(dpcm->substream); | |
359 | } | |
360 | ||
361 | static enum hrtimer_restart dummy_hrtimer_callback(struct hrtimer *timer) | |
362 | { | |
363 | struct dummy_hrtimer_pcm *dpcm; | |
364 | ||
365 | dpcm = container_of(timer, struct dummy_hrtimer_pcm, timer); | |
366 | if (!atomic_read(&dpcm->running)) | |
367 | return HRTIMER_NORESTART; | |
368 | tasklet_schedule(&dpcm->tasklet); | |
369 | hrtimer_forward_now(timer, dpcm->period_time); | |
370 | return HRTIMER_RESTART; | |
371 | } | |
372 | ||
373 | static int dummy_hrtimer_start(struct snd_pcm_substream *substream) | |
374 | { | |
375 | struct dummy_hrtimer_pcm *dpcm = substream->runtime->private_data; | |
376 | ||
377 | dpcm->base_time = hrtimer_cb_get_time(&dpcm->timer); | |
378 | hrtimer_start(&dpcm->timer, dpcm->period_time, HRTIMER_MODE_REL); | |
379 | atomic_set(&dpcm->running, 1); | |
380 | return 0; | |
381 | } | |
382 | ||
383 | static int dummy_hrtimer_stop(struct snd_pcm_substream *substream) | |
384 | { | |
385 | struct dummy_hrtimer_pcm *dpcm = substream->runtime->private_data; | |
386 | ||
387 | atomic_set(&dpcm->running, 0); | |
388 | hrtimer_cancel(&dpcm->timer); | |
389 | return 0; | |
390 | } | |
391 | ||
392 | static inline void dummy_hrtimer_sync(struct dummy_hrtimer_pcm *dpcm) | |
393 | { | |
394 | tasklet_kill(&dpcm->tasklet); | |
395 | } | |
396 | ||
397 | static snd_pcm_uframes_t | |
398 | dummy_hrtimer_pointer(struct snd_pcm_substream *substream) | |
399 | { | |
400 | struct snd_pcm_runtime *runtime = substream->runtime; | |
401 | struct dummy_hrtimer_pcm *dpcm = runtime->private_data; | |
402 | u64 delta; | |
403 | u32 pos; | |
404 | ||
405 | delta = ktime_us_delta(hrtimer_cb_get_time(&dpcm->timer), | |
406 | dpcm->base_time); | |
407 | delta = div_u64(delta * runtime->rate + 999999, 1000000); | |
408 | div_u64_rem(delta, runtime->buffer_size, &pos); | |
409 | return pos; | |
410 | } | |
411 | ||
412 | static int dummy_hrtimer_prepare(struct snd_pcm_substream *substream) | |
1da177e4 | 413 | { |
c631d03c TI |
414 | struct snd_pcm_runtime *runtime = substream->runtime; |
415 | struct dummy_hrtimer_pcm *dpcm = runtime->private_data; | |
416 | unsigned int period, rate; | |
417 | long sec; | |
418 | unsigned long nsecs; | |
419 | ||
420 | dummy_hrtimer_sync(dpcm); | |
421 | period = runtime->period_size; | |
422 | rate = runtime->rate; | |
423 | sec = period / rate; | |
424 | period %= rate; | |
425 | nsecs = div_u64((u64)period * 1000000000UL + rate - 1, rate); | |
426 | dpcm->period_time = ktime_set(sec, nsecs); | |
427 | ||
428 | return 0; | |
429 | } | |
430 | ||
431 | static int dummy_hrtimer_create(struct snd_pcm_substream *substream) | |
432 | { | |
433 | struct dummy_hrtimer_pcm *dpcm; | |
434 | ||
435 | dpcm = kzalloc(sizeof(*dpcm), GFP_KERNEL); | |
436 | if (!dpcm) | |
437 | return -ENOMEM; | |
438 | substream->runtime->private_data = dpcm; | |
439 | hrtimer_init(&dpcm->timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); | |
440 | dpcm->timer.function = dummy_hrtimer_callback; | |
441 | dpcm->substream = substream; | |
442 | atomic_set(&dpcm->running, 0); | |
443 | tasklet_init(&dpcm->tasklet, dummy_hrtimer_pcm_elapsed, | |
444 | (unsigned long)dpcm); | |
445 | return 0; | |
446 | } | |
447 | ||
448 | static void dummy_hrtimer_free(struct snd_pcm_substream *substream) | |
449 | { | |
450 | struct dummy_hrtimer_pcm *dpcm = substream->runtime->private_data; | |
451 | dummy_hrtimer_sync(dpcm); | |
452 | kfree(dpcm); | |
453 | } | |
454 | ||
455 | static struct dummy_timer_ops dummy_hrtimer_ops = { | |
456 | .create = dummy_hrtimer_create, | |
457 | .free = dummy_hrtimer_free, | |
458 | .prepare = dummy_hrtimer_prepare, | |
459 | .start = dummy_hrtimer_start, | |
460 | .stop = dummy_hrtimer_stop, | |
461 | .pointer = dummy_hrtimer_pointer, | |
462 | }; | |
463 | ||
464 | #endif /* CONFIG_HIGH_RES_TIMERS */ | |
465 | ||
466 | /* | |
467 | * PCM interface | |
468 | */ | |
469 | ||
470 | static int dummy_pcm_trigger(struct snd_pcm_substream *substream, int cmd) | |
471 | { | |
472 | struct snd_dummy *dummy = snd_pcm_substream_chip(substream); | |
473 | ||
474 | switch (cmd) { | |
475 | case SNDRV_PCM_TRIGGER_START: | |
476 | case SNDRV_PCM_TRIGGER_RESUME: | |
477 | return dummy->timer_ops->start(substream); | |
478 | case SNDRV_PCM_TRIGGER_STOP: | |
479 | case SNDRV_PCM_TRIGGER_SUSPEND: | |
480 | return dummy->timer_ops->stop(substream); | |
481 | } | |
482 | return -EINVAL; | |
483 | } | |
484 | ||
485 | static int dummy_pcm_prepare(struct snd_pcm_substream *substream) | |
486 | { | |
c631d03c TI |
487 | struct snd_dummy *dummy = snd_pcm_substream_chip(substream); |
488 | ||
c631d03c TI |
489 | return dummy->timer_ops->prepare(substream); |
490 | } | |
491 | ||
492 | static snd_pcm_uframes_t dummy_pcm_pointer(struct snd_pcm_substream *substream) | |
493 | { | |
494 | struct snd_dummy *dummy = snd_pcm_substream_chip(substream); | |
495 | ||
496 | return dummy->timer_ops->pointer(substream); | |
497 | } | |
498 | ||
499 | static struct snd_pcm_hardware dummy_pcm_hardware = { | |
500 | .info = (SNDRV_PCM_INFO_MMAP | | |
501 | SNDRV_PCM_INFO_INTERLEAVED | | |
502 | SNDRV_PCM_INFO_RESUME | | |
503 | SNDRV_PCM_INFO_MMAP_VALID), | |
1da177e4 LT |
504 | .formats = USE_FORMATS, |
505 | .rates = USE_RATE, | |
506 | .rate_min = USE_RATE_MIN, | |
507 | .rate_max = USE_RATE_MAX, | |
508 | .channels_min = USE_CHANNELS_MIN, | |
509 | .channels_max = USE_CHANNELS_MAX, | |
510 | .buffer_bytes_max = MAX_BUFFER_SIZE, | |
511 | .period_bytes_min = 64, | |
2ad5dd8d | 512 | .period_bytes_max = MAX_PERIOD_SIZE, |
1da177e4 LT |
513 | .periods_min = USE_PERIODS_MIN, |
514 | .periods_max = USE_PERIODS_MAX, | |
515 | .fifo_size = 0, | |
516 | }; | |
517 | ||
c631d03c TI |
518 | static int dummy_pcm_hw_params(struct snd_pcm_substream *substream, |
519 | struct snd_pcm_hw_params *hw_params) | |
1da177e4 | 520 | { |
a68c4d11 TI |
521 | if (fake_buffer) { |
522 | /* runtime->dma_bytes has to be set manually to allow mmap */ | |
523 | substream->runtime->dma_bytes = params_buffer_bytes(hw_params); | |
524 | return 0; | |
525 | } | |
c631d03c TI |
526 | return snd_pcm_lib_malloc_pages(substream, |
527 | params_buffer_bytes(hw_params)); | |
1da177e4 LT |
528 | } |
529 | ||
c631d03c | 530 | static int dummy_pcm_hw_free(struct snd_pcm_substream *substream) |
1da177e4 | 531 | { |
a68c4d11 TI |
532 | if (fake_buffer) |
533 | return 0; | |
1da177e4 LT |
534 | return snd_pcm_lib_free_pages(substream); |
535 | } | |
536 | ||
c631d03c | 537 | static int dummy_pcm_open(struct snd_pcm_substream *substream) |
c8eb6ba1 | 538 | { |
c631d03c | 539 | struct snd_dummy *dummy = snd_pcm_substream_chip(substream); |
4a4d2cfd | 540 | struct snd_pcm_runtime *runtime = substream->runtime; |
c8eb6ba1 TI |
541 | int err; |
542 | ||
c631d03c TI |
543 | dummy->timer_ops = &dummy_systimer_ops; |
544 | #ifdef CONFIG_HIGH_RES_TIMERS | |
545 | if (hrtimer) | |
546 | dummy->timer_ops = &dummy_hrtimer_ops; | |
547 | #endif | |
548 | ||
549 | err = dummy->timer_ops->create(substream); | |
1a11cb64 | 550 | if (err < 0) |
1da177e4 | 551 | return err; |
1da177e4 | 552 | |
c631d03c TI |
553 | runtime->hw = dummy_pcm_hardware; |
554 | if (substream->pcm->device & 1) { | |
1da177e4 LT |
555 | runtime->hw.info &= ~SNDRV_PCM_INFO_INTERLEAVED; |
556 | runtime->hw.info |= SNDRV_PCM_INFO_NONINTERLEAVED; | |
557 | } | |
558 | if (substream->pcm->device & 2) | |
c631d03c TI |
559 | runtime->hw.info &= ~(SNDRV_PCM_INFO_MMAP | |
560 | SNDRV_PCM_INFO_MMAP_VALID); | |
561 | ||
562 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) | |
563 | err = add_playback_constraints(substream->runtime); | |
564 | else | |
565 | err = add_capture_constraints(substream->runtime); | |
566 | if (err < 0) { | |
567 | dummy->timer_ops->free(substream); | |
1da177e4 | 568 | return err; |
c631d03c | 569 | } |
1da177e4 LT |
570 | return 0; |
571 | } | |
572 | ||
c631d03c | 573 | static int dummy_pcm_close(struct snd_pcm_substream *substream) |
1da177e4 | 574 | { |
c631d03c TI |
575 | struct snd_dummy *dummy = snd_pcm_substream_chip(substream); |
576 | dummy->timer_ops->free(substream); | |
1da177e4 LT |
577 | return 0; |
578 | } | |
579 | ||
a68c4d11 TI |
580 | /* |
581 | * dummy buffer handling | |
582 | */ | |
583 | ||
584 | static void *dummy_page[2]; | |
585 | ||
586 | static void free_fake_buffer(void) | |
587 | { | |
588 | if (fake_buffer) { | |
589 | int i; | |
590 | for (i = 0; i < 2; i++) | |
591 | if (dummy_page[i]) { | |
592 | free_page((unsigned long)dummy_page[i]); | |
593 | dummy_page[i] = NULL; | |
594 | } | |
595 | } | |
596 | } | |
597 | ||
598 | static int alloc_fake_buffer(void) | |
599 | { | |
600 | int i; | |
601 | ||
602 | if (!fake_buffer) | |
603 | return 0; | |
604 | for (i = 0; i < 2; i++) { | |
605 | dummy_page[i] = (void *)get_zeroed_page(GFP_KERNEL); | |
606 | if (!dummy_page[i]) { | |
607 | free_fake_buffer(); | |
608 | return -ENOMEM; | |
609 | } | |
610 | } | |
611 | return 0; | |
612 | } | |
613 | ||
614 | static int dummy_pcm_copy(struct snd_pcm_substream *substream, | |
615 | int channel, snd_pcm_uframes_t pos, | |
616 | void __user *dst, snd_pcm_uframes_t count) | |
617 | { | |
618 | return 0; /* do nothing */ | |
619 | } | |
620 | ||
621 | static int dummy_pcm_silence(struct snd_pcm_substream *substream, | |
622 | int channel, snd_pcm_uframes_t pos, | |
623 | snd_pcm_uframes_t count) | |
624 | { | |
625 | return 0; /* do nothing */ | |
626 | } | |
627 | ||
628 | static struct page *dummy_pcm_page(struct snd_pcm_substream *substream, | |
629 | unsigned long offset) | |
630 | { | |
631 | return virt_to_page(dummy_page[substream->stream]); /* the same page */ | |
632 | } | |
633 | ||
c631d03c TI |
634 | static struct snd_pcm_ops dummy_pcm_ops = { |
635 | .open = dummy_pcm_open, | |
636 | .close = dummy_pcm_close, | |
637 | .ioctl = snd_pcm_lib_ioctl, | |
638 | .hw_params = dummy_pcm_hw_params, | |
639 | .hw_free = dummy_pcm_hw_free, | |
640 | .prepare = dummy_pcm_prepare, | |
641 | .trigger = dummy_pcm_trigger, | |
642 | .pointer = dummy_pcm_pointer, | |
1da177e4 LT |
643 | }; |
644 | ||
a68c4d11 TI |
645 | static struct snd_pcm_ops dummy_pcm_ops_no_buf = { |
646 | .open = dummy_pcm_open, | |
647 | .close = dummy_pcm_close, | |
648 | .ioctl = snd_pcm_lib_ioctl, | |
649 | .hw_params = dummy_pcm_hw_params, | |
650 | .hw_free = dummy_pcm_hw_free, | |
651 | .prepare = dummy_pcm_prepare, | |
652 | .trigger = dummy_pcm_trigger, | |
653 | .pointer = dummy_pcm_pointer, | |
654 | .copy = dummy_pcm_copy, | |
655 | .silence = dummy_pcm_silence, | |
656 | .page = dummy_pcm_page, | |
657 | }; | |
658 | ||
788c6043 PB |
659 | static int __devinit snd_card_dummy_pcm(struct snd_dummy *dummy, int device, |
660 | int substreams) | |
1da177e4 | 661 | { |
4a4d2cfd | 662 | struct snd_pcm *pcm; |
a68c4d11 | 663 | struct snd_pcm_ops *ops; |
1da177e4 LT |
664 | int err; |
665 | ||
1a11cb64 JK |
666 | err = snd_pcm_new(dummy->card, "Dummy PCM", device, |
667 | substreams, substreams, &pcm); | |
668 | if (err < 0) | |
1da177e4 | 669 | return err; |
6e65c1cc | 670 | dummy->pcm = pcm; |
a68c4d11 TI |
671 | if (fake_buffer) |
672 | ops = &dummy_pcm_ops_no_buf; | |
673 | else | |
674 | ops = &dummy_pcm_ops; | |
675 | snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, ops); | |
676 | snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, ops); | |
1da177e4 LT |
677 | pcm->private_data = dummy; |
678 | pcm->info_flags = 0; | |
679 | strcpy(pcm->name, "Dummy PCM"); | |
a68c4d11 TI |
680 | if (!fake_buffer) { |
681 | snd_pcm_lib_preallocate_pages_for_all(pcm, | |
682 | SNDRV_DMA_TYPE_CONTINUOUS, | |
683 | snd_dma_continuous_data(GFP_KERNEL), | |
684 | 0, 64*1024); | |
685 | } | |
1da177e4 LT |
686 | return 0; |
687 | } | |
688 | ||
689 | #define DUMMY_VOLUME(xname, xindex, addr) \ | |
fb567a8e TI |
690 | { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, \ |
691 | .access = SNDRV_CTL_ELEM_ACCESS_READWRITE | SNDRV_CTL_ELEM_ACCESS_TLV_READ, \ | |
692 | .name = xname, .index = xindex, \ | |
1da177e4 LT |
693 | .info = snd_dummy_volume_info, \ |
694 | .get = snd_dummy_volume_get, .put = snd_dummy_volume_put, \ | |
fb567a8e TI |
695 | .private_value = addr, \ |
696 | .tlv = { .p = db_scale_dummy } } | |
1da177e4 | 697 | |
4a4d2cfd TI |
698 | static int snd_dummy_volume_info(struct snd_kcontrol *kcontrol, |
699 | struct snd_ctl_elem_info *uinfo) | |
1da177e4 LT |
700 | { |
701 | uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; | |
702 | uinfo->count = 2; | |
703 | uinfo->value.integer.min = -50; | |
704 | uinfo->value.integer.max = 100; | |
705 | return 0; | |
706 | } | |
707 | ||
4a4d2cfd TI |
708 | static int snd_dummy_volume_get(struct snd_kcontrol *kcontrol, |
709 | struct snd_ctl_elem_value *ucontrol) | |
1da177e4 | 710 | { |
4a4d2cfd | 711 | struct snd_dummy *dummy = snd_kcontrol_chip(kcontrol); |
1da177e4 LT |
712 | int addr = kcontrol->private_value; |
713 | ||
c8eb6ba1 | 714 | spin_lock_irq(&dummy->mixer_lock); |
1da177e4 LT |
715 | ucontrol->value.integer.value[0] = dummy->mixer_volume[addr][0]; |
716 | ucontrol->value.integer.value[1] = dummy->mixer_volume[addr][1]; | |
c8eb6ba1 | 717 | spin_unlock_irq(&dummy->mixer_lock); |
1da177e4 LT |
718 | return 0; |
719 | } | |
720 | ||
4a4d2cfd TI |
721 | static int snd_dummy_volume_put(struct snd_kcontrol *kcontrol, |
722 | struct snd_ctl_elem_value *ucontrol) | |
1da177e4 | 723 | { |
4a4d2cfd | 724 | struct snd_dummy *dummy = snd_kcontrol_chip(kcontrol); |
1da177e4 LT |
725 | int change, addr = kcontrol->private_value; |
726 | int left, right; | |
727 | ||
728 | left = ucontrol->value.integer.value[0]; | |
729 | if (left < -50) | |
730 | left = -50; | |
731 | if (left > 100) | |
732 | left = 100; | |
733 | right = ucontrol->value.integer.value[1]; | |
734 | if (right < -50) | |
735 | right = -50; | |
736 | if (right > 100) | |
737 | right = 100; | |
c8eb6ba1 | 738 | spin_lock_irq(&dummy->mixer_lock); |
1da177e4 LT |
739 | change = dummy->mixer_volume[addr][0] != left || |
740 | dummy->mixer_volume[addr][1] != right; | |
741 | dummy->mixer_volume[addr][0] = left; | |
742 | dummy->mixer_volume[addr][1] = right; | |
c8eb6ba1 | 743 | spin_unlock_irq(&dummy->mixer_lock); |
1da177e4 LT |
744 | return change; |
745 | } | |
746 | ||
0cb29ea0 | 747 | static const DECLARE_TLV_DB_SCALE(db_scale_dummy, -4500, 30, 0); |
fb567a8e | 748 | |
1da177e4 LT |
749 | #define DUMMY_CAPSRC(xname, xindex, addr) \ |
750 | { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \ | |
751 | .info = snd_dummy_capsrc_info, \ | |
752 | .get = snd_dummy_capsrc_get, .put = snd_dummy_capsrc_put, \ | |
753 | .private_value = addr } | |
754 | ||
a5ce8890 | 755 | #define snd_dummy_capsrc_info snd_ctl_boolean_stereo_info |
1da177e4 | 756 | |
4a4d2cfd TI |
757 | static int snd_dummy_capsrc_get(struct snd_kcontrol *kcontrol, |
758 | struct snd_ctl_elem_value *ucontrol) | |
1da177e4 | 759 | { |
4a4d2cfd | 760 | struct snd_dummy *dummy = snd_kcontrol_chip(kcontrol); |
1da177e4 LT |
761 | int addr = kcontrol->private_value; |
762 | ||
c8eb6ba1 | 763 | spin_lock_irq(&dummy->mixer_lock); |
1da177e4 LT |
764 | ucontrol->value.integer.value[0] = dummy->capture_source[addr][0]; |
765 | ucontrol->value.integer.value[1] = dummy->capture_source[addr][1]; | |
c8eb6ba1 | 766 | spin_unlock_irq(&dummy->mixer_lock); |
1da177e4 LT |
767 | return 0; |
768 | } | |
769 | ||
4a4d2cfd | 770 | static int snd_dummy_capsrc_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) |
1da177e4 | 771 | { |
4a4d2cfd | 772 | struct snd_dummy *dummy = snd_kcontrol_chip(kcontrol); |
1da177e4 LT |
773 | int change, addr = kcontrol->private_value; |
774 | int left, right; | |
775 | ||
776 | left = ucontrol->value.integer.value[0] & 1; | |
777 | right = ucontrol->value.integer.value[1] & 1; | |
c8eb6ba1 | 778 | spin_lock_irq(&dummy->mixer_lock); |
1da177e4 LT |
779 | change = dummy->capture_source[addr][0] != left && |
780 | dummy->capture_source[addr][1] != right; | |
781 | dummy->capture_source[addr][0] = left; | |
782 | dummy->capture_source[addr][1] = right; | |
c8eb6ba1 | 783 | spin_unlock_irq(&dummy->mixer_lock); |
1da177e4 LT |
784 | return change; |
785 | } | |
786 | ||
4a4d2cfd | 787 | static struct snd_kcontrol_new snd_dummy_controls[] = { |
1da177e4 LT |
788 | DUMMY_VOLUME("Master Volume", 0, MIXER_ADDR_MASTER), |
789 | DUMMY_CAPSRC("Master Capture Switch", 0, MIXER_ADDR_MASTER), | |
790 | DUMMY_VOLUME("Synth Volume", 0, MIXER_ADDR_SYNTH), | |
e05d6964 | 791 | DUMMY_CAPSRC("Synth Capture Switch", 0, MIXER_ADDR_SYNTH), |
1da177e4 | 792 | DUMMY_VOLUME("Line Volume", 0, MIXER_ADDR_LINE), |
e05d6964 | 793 | DUMMY_CAPSRC("Line Capture Switch", 0, MIXER_ADDR_LINE), |
1da177e4 | 794 | DUMMY_VOLUME("Mic Volume", 0, MIXER_ADDR_MIC), |
e05d6964 | 795 | DUMMY_CAPSRC("Mic Capture Switch", 0, MIXER_ADDR_MIC), |
1da177e4 | 796 | DUMMY_VOLUME("CD Volume", 0, MIXER_ADDR_CD), |
e05d6964 | 797 | DUMMY_CAPSRC("CD Capture Switch", 0, MIXER_ADDR_CD) |
1da177e4 LT |
798 | }; |
799 | ||
788c6043 | 800 | static int __devinit snd_card_dummy_new_mixer(struct snd_dummy *dummy) |
1da177e4 | 801 | { |
4a4d2cfd | 802 | struct snd_card *card = dummy->card; |
1da177e4 LT |
803 | unsigned int idx; |
804 | int err; | |
805 | ||
5e246b85 TI |
806 | if (snd_BUG_ON(!dummy)) |
807 | return -EINVAL; | |
1da177e4 LT |
808 | spin_lock_init(&dummy->mixer_lock); |
809 | strcpy(card->mixername, "Dummy Mixer"); | |
810 | ||
811 | for (idx = 0; idx < ARRAY_SIZE(snd_dummy_controls); idx++) { | |
1a11cb64 JK |
812 | err = snd_ctl_add(card, snd_ctl_new1(&snd_dummy_controls[idx], dummy)); |
813 | if (err < 0) | |
1da177e4 LT |
814 | return err; |
815 | } | |
816 | return 0; | |
817 | } | |
818 | ||
788c6043 | 819 | static int __devinit snd_dummy_probe(struct platform_device *devptr) |
1da177e4 | 820 | { |
4a4d2cfd TI |
821 | struct snd_card *card; |
822 | struct snd_dummy *dummy; | |
1da177e4 | 823 | int idx, err; |
6e65c1cc | 824 | int dev = devptr->id; |
1da177e4 | 825 | |
bd7dd77c TI |
826 | err = snd_card_create(index[dev], id[dev], THIS_MODULE, |
827 | sizeof(struct snd_dummy), &card); | |
828 | if (err < 0) | |
829 | return err; | |
4a4d2cfd | 830 | dummy = card->private_data; |
1da177e4 LT |
831 | dummy->card = card; |
832 | for (idx = 0; idx < MAX_PCM_DEVICES && idx < pcm_devs[dev]; idx++) { | |
833 | if (pcm_substreams[dev] < 1) | |
834 | pcm_substreams[dev] = 1; | |
835 | if (pcm_substreams[dev] > MAX_PCM_SUBSTREAMS) | |
836 | pcm_substreams[dev] = MAX_PCM_SUBSTREAMS; | |
1a11cb64 JK |
837 | err = snd_card_dummy_pcm(dummy, idx, pcm_substreams[dev]); |
838 | if (err < 0) | |
1da177e4 LT |
839 | goto __nodev; |
840 | } | |
1a11cb64 JK |
841 | err = snd_card_dummy_new_mixer(dummy); |
842 | if (err < 0) | |
1da177e4 LT |
843 | goto __nodev; |
844 | strcpy(card->driver, "Dummy"); | |
845 | strcpy(card->shortname, "Dummy"); | |
846 | sprintf(card->longname, "Dummy %i", dev + 1); | |
16dab54b | 847 | |
6e65c1cc | 848 | snd_card_set_dev(card, &devptr->dev); |
16dab54b | 849 | |
1a11cb64 JK |
850 | err = snd_card_register(card); |
851 | if (err == 0) { | |
6e65c1cc | 852 | platform_set_drvdata(devptr, card); |
1da177e4 LT |
853 | return 0; |
854 | } | |
855 | __nodev: | |
856 | snd_card_free(card); | |
857 | return err; | |
858 | } | |
859 | ||
788c6043 | 860 | static int __devexit snd_dummy_remove(struct platform_device *devptr) |
6e65c1cc TI |
861 | { |
862 | snd_card_free(platform_get_drvdata(devptr)); | |
863 | platform_set_drvdata(devptr, NULL); | |
864 | return 0; | |
865 | } | |
866 | ||
867 | #ifdef CONFIG_PM | |
868 | static int snd_dummy_suspend(struct platform_device *pdev, pm_message_t state) | |
1da177e4 | 869 | { |
6e65c1cc TI |
870 | struct snd_card *card = platform_get_drvdata(pdev); |
871 | struct snd_dummy *dummy = card->private_data; | |
1da177e4 | 872 | |
6e65c1cc TI |
873 | snd_power_change_state(card, SNDRV_CTL_POWER_D3hot); |
874 | snd_pcm_suspend_all(dummy->pcm); | |
875 | return 0; | |
876 | } | |
877 | ||
878 | static int snd_dummy_resume(struct platform_device *pdev) | |
879 | { | |
880 | struct snd_card *card = platform_get_drvdata(pdev); | |
881 | ||
882 | snd_power_change_state(card, SNDRV_CTL_POWER_D0); | |
883 | return 0; | |
884 | } | |
885 | #endif | |
886 | ||
887 | #define SND_DUMMY_DRIVER "snd_dummy" | |
888 | ||
889 | static struct platform_driver snd_dummy_driver = { | |
890 | .probe = snd_dummy_probe, | |
788c6043 | 891 | .remove = __devexit_p(snd_dummy_remove), |
6e65c1cc TI |
892 | #ifdef CONFIG_PM |
893 | .suspend = snd_dummy_suspend, | |
894 | .resume = snd_dummy_resume, | |
1da177e4 | 895 | #endif |
6e65c1cc TI |
896 | .driver = { |
897 | .name = SND_DUMMY_DRIVER | |
898 | }, | |
899 | }; | |
900 | ||
c12aad6e | 901 | static void snd_dummy_unregister_all(void) |
f7a9275d CL |
902 | { |
903 | int i; | |
904 | ||
905 | for (i = 0; i < ARRAY_SIZE(devices); ++i) | |
906 | platform_device_unregister(devices[i]); | |
907 | platform_driver_unregister(&snd_dummy_driver); | |
a68c4d11 | 908 | free_fake_buffer(); |
f7a9275d CL |
909 | } |
910 | ||
6e65c1cc TI |
911 | static int __init alsa_card_dummy_init(void) |
912 | { | |
913 | int i, cards, err; | |
914 | ||
1a11cb64 JK |
915 | err = platform_driver_register(&snd_dummy_driver); |
916 | if (err < 0) | |
6e65c1cc TI |
917 | return err; |
918 | ||
a68c4d11 TI |
919 | err = alloc_fake_buffer(); |
920 | if (err < 0) { | |
921 | platform_driver_unregister(&snd_dummy_driver); | |
922 | return err; | |
923 | } | |
924 | ||
6e65c1cc | 925 | cards = 0; |
8278ca8f | 926 | for (i = 0; i < SNDRV_CARDS; i++) { |
6e65c1cc | 927 | struct platform_device *device; |
8278ca8f TI |
928 | if (! enable[i]) |
929 | continue; | |
6e65c1cc TI |
930 | device = platform_device_register_simple(SND_DUMMY_DRIVER, |
931 | i, NULL, 0); | |
a182ee98 RH |
932 | if (IS_ERR(device)) |
933 | continue; | |
7152447d RH |
934 | if (!platform_get_drvdata(device)) { |
935 | platform_device_unregister(device); | |
936 | continue; | |
937 | } | |
f7a9275d | 938 | devices[i] = device; |
1da177e4 LT |
939 | cards++; |
940 | } | |
941 | if (!cards) { | |
942 | #ifdef MODULE | |
943 | printk(KERN_ERR "Dummy soundcard not found or device busy\n"); | |
944 | #endif | |
a182ee98 RH |
945 | snd_dummy_unregister_all(); |
946 | return -ENODEV; | |
1da177e4 LT |
947 | } |
948 | return 0; | |
949 | } | |
950 | ||
951 | static void __exit alsa_card_dummy_exit(void) | |
952 | { | |
f7a9275d | 953 | snd_dummy_unregister_all(); |
1da177e4 LT |
954 | } |
955 | ||
956 | module_init(alsa_card_dummy_init) | |
957 | module_exit(alsa_card_dummy_exit) |