Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * Dummy soundcard | |
3 | * Copyright (c) by Jaroslav Kysela <perex@suse.cz> | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify | |
6 | * it under the terms of the GNU General Public License as published by | |
7 | * the Free Software Foundation; either version 2 of the License, or | |
8 | * (at your option) any later version. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, | |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | * GNU General Public License for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License | |
16 | * along with this program; if not, write to the Free Software | |
17 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
18 | * | |
19 | */ | |
20 | ||
21 | #include <sound/driver.h> | |
22 | #include <linux/init.h> | |
6e65c1cc TI |
23 | #include <linux/err.h> |
24 | #include <linux/platform_device.h> | |
1da177e4 LT |
25 | #include <linux/jiffies.h> |
26 | #include <linux/slab.h> | |
27 | #include <linux/time.h> | |
28 | #include <linux/wait.h> | |
29 | #include <linux/moduleparam.h> | |
30 | #include <sound/core.h> | |
31 | #include <sound/control.h> | |
32 | #include <sound/pcm.h> | |
33 | #include <sound/rawmidi.h> | |
34 | #include <sound/initval.h> | |
35 | ||
36 | MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>"); | |
37 | MODULE_DESCRIPTION("Dummy soundcard (/dev/null)"); | |
38 | MODULE_LICENSE("GPL"); | |
39 | MODULE_SUPPORTED_DEVICE("{{ALSA,Dummy soundcard}}"); | |
40 | ||
41 | #define MAX_PCM_DEVICES 4 | |
42 | #define MAX_PCM_SUBSTREAMS 16 | |
43 | #define MAX_MIDI_DEVICES 2 | |
44 | ||
45 | #if 0 /* emu10k1 emulation */ | |
46 | #define MAX_BUFFER_SIZE (128 * 1024) | |
4a4d2cfd | 47 | static int emu10k1_playback_constraints(struct snd_pcm_runtime *runtime) |
1da177e4 LT |
48 | { |
49 | int err; | |
50 | if ((err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS)) < 0) | |
51 | return err; | |
52 | if ((err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 256, UINT_MAX)) < 0) | |
53 | return err; | |
54 | return 0; | |
55 | } | |
56 | #define add_playback_constraints emu10k1_playback_constraints | |
57 | #endif | |
58 | ||
59 | #if 0 /* RME9652 emulation */ | |
60 | #define MAX_BUFFER_SIZE (26 * 64 * 1024) | |
61 | #define USE_FORMATS SNDRV_PCM_FMTBIT_S32_LE | |
62 | #define USE_CHANNELS_MIN 26 | |
63 | #define USE_CHANNELS_MAX 26 | |
64 | #define USE_PERIODS_MIN 2 | |
65 | #define USE_PERIODS_MAX 2 | |
66 | #endif | |
67 | ||
68 | #if 0 /* ICE1712 emulation */ | |
69 | #define MAX_BUFFER_SIZE (256 * 1024) | |
70 | #define USE_FORMATS SNDRV_PCM_FMTBIT_S32_LE | |
71 | #define USE_CHANNELS_MIN 10 | |
72 | #define USE_CHANNELS_MAX 10 | |
73 | #define USE_PERIODS_MIN 1 | |
74 | #define USE_PERIODS_MAX 1024 | |
75 | #endif | |
76 | ||
77 | #if 0 /* UDA1341 emulation */ | |
78 | #define MAX_BUFFER_SIZE (16380) | |
79 | #define USE_FORMATS SNDRV_PCM_FMTBIT_S16_LE | |
80 | #define USE_CHANNELS_MIN 2 | |
81 | #define USE_CHANNELS_MAX 2 | |
82 | #define USE_PERIODS_MIN 2 | |
83 | #define USE_PERIODS_MAX 255 | |
84 | #endif | |
85 | ||
86 | #if 0 /* simple AC97 bridge (intel8x0) with 48kHz AC97 only codec */ | |
87 | #define USE_FORMATS SNDRV_PCM_FMTBIT_S16_LE | |
88 | #define USE_CHANNELS_MIN 2 | |
89 | #define USE_CHANNELS_MAX 2 | |
90 | #define USE_RATE SNDRV_PCM_RATE_48000 | |
91 | #define USE_RATE_MIN 48000 | |
92 | #define USE_RATE_MAX 48000 | |
93 | #endif | |
94 | ||
2ad5dd8d JK |
95 | #if 0 /* CA0106 */ |
96 | #define USE_FORMATS SNDRV_PCM_FMTBIT_S16_LE | |
97 | #define USE_CHANNELS_MIN 2 | |
98 | #define USE_CHANNELS_MAX 2 | |
99 | #define USE_RATE (SNDRV_PCM_RATE_48000|SNDRV_PCM_RATE_96000|SNDRV_PCM_RATE_192000) | |
100 | #define USE_RATE_MIN 48000 | |
101 | #define USE_RATE_MAX 192000 | |
102 | #define MAX_BUFFER_SIZE ((65536-64)*8) | |
103 | #define MAX_PERIOD_SIZE (65536-64) | |
104 | #define USE_PERIODS_MIN 2 | |
105 | #define USE_PERIODS_MAX 8 | |
106 | #endif | |
107 | ||
1da177e4 LT |
108 | |
109 | /* defaults */ | |
110 | #ifndef MAX_BUFFER_SIZE | |
111 | #define MAX_BUFFER_SIZE (64*1024) | |
112 | #endif | |
2ad5dd8d JK |
113 | #ifndef MAX_PERIOD_SIZE |
114 | #define MAX_PERIOD_SIZE MAX_BUFFER_SIZE | |
115 | #endif | |
1da177e4 LT |
116 | #ifndef USE_FORMATS |
117 | #define USE_FORMATS (SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE) | |
118 | #endif | |
119 | #ifndef USE_RATE | |
120 | #define USE_RATE SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_48000 | |
121 | #define USE_RATE_MIN 5500 | |
122 | #define USE_RATE_MAX 48000 | |
123 | #endif | |
124 | #ifndef USE_CHANNELS_MIN | |
125 | #define USE_CHANNELS_MIN 1 | |
126 | #endif | |
127 | #ifndef USE_CHANNELS_MAX | |
128 | #define USE_CHANNELS_MAX 2 | |
129 | #endif | |
130 | #ifndef USE_PERIODS_MIN | |
131 | #define USE_PERIODS_MIN 1 | |
132 | #endif | |
133 | #ifndef USE_PERIODS_MAX | |
134 | #define USE_PERIODS_MAX 1024 | |
135 | #endif | |
136 | #ifndef add_playback_constraints | |
137 | #define add_playback_constraints(x) 0 | |
138 | #endif | |
139 | #ifndef add_capture_constraints | |
140 | #define add_capture_constraints(x) 0 | |
141 | #endif | |
142 | ||
143 | static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-MAX */ | |
144 | static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* ID for this card */ | |
145 | static int enable[SNDRV_CARDS] = {1, [1 ... (SNDRV_CARDS - 1)] = 0}; | |
146 | static int pcm_devs[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 1}; | |
147 | static int pcm_substreams[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 8}; | |
148 | //static int midi_devs[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 2}; | |
149 | ||
150 | module_param_array(index, int, NULL, 0444); | |
151 | MODULE_PARM_DESC(index, "Index value for dummy soundcard."); | |
152 | module_param_array(id, charp, NULL, 0444); | |
153 | MODULE_PARM_DESC(id, "ID string for dummy soundcard."); | |
154 | module_param_array(enable, bool, NULL, 0444); | |
155 | MODULE_PARM_DESC(enable, "Enable this dummy soundcard."); | |
156 | module_param_array(pcm_devs, int, NULL, 0444); | |
157 | MODULE_PARM_DESC(pcm_devs, "PCM devices # (0-4) for dummy driver."); | |
158 | module_param_array(pcm_substreams, int, NULL, 0444); | |
159 | MODULE_PARM_DESC(pcm_substreams, "PCM substreams # (1-16) for dummy driver."); | |
160 | //module_param_array(midi_devs, int, NULL, 0444); | |
161 | //MODULE_PARM_DESC(midi_devs, "MIDI devices # (0-2) for dummy driver."); | |
162 | ||
f7a9275d CL |
163 | static struct platform_device *devices[SNDRV_CARDS]; |
164 | ||
1da177e4 LT |
165 | #define MIXER_ADDR_MASTER 0 |
166 | #define MIXER_ADDR_LINE 1 | |
167 | #define MIXER_ADDR_MIC 2 | |
168 | #define MIXER_ADDR_SYNTH 3 | |
169 | #define MIXER_ADDR_CD 4 | |
170 | #define MIXER_ADDR_LAST 4 | |
171 | ||
4a4d2cfd TI |
172 | struct snd_dummy { |
173 | struct snd_card *card; | |
6e65c1cc | 174 | struct snd_pcm *pcm; |
1da177e4 LT |
175 | spinlock_t mixer_lock; |
176 | int mixer_volume[MIXER_ADDR_LAST+1][2]; | |
177 | int capture_source[MIXER_ADDR_LAST+1][2]; | |
4a4d2cfd | 178 | }; |
1da177e4 | 179 | |
4a4d2cfd TI |
180 | struct snd_dummy_pcm { |
181 | struct snd_dummy *dummy; | |
1da177e4 LT |
182 | spinlock_t lock; |
183 | struct timer_list timer; | |
184 | unsigned int pcm_size; | |
185 | unsigned int pcm_count; | |
186 | unsigned int pcm_bps; /* bytes per second */ | |
187 | unsigned int pcm_jiffie; /* bytes per one jiffie */ | |
188 | unsigned int pcm_irq_pos; /* IRQ position */ | |
189 | unsigned int pcm_buf_pos; /* position in buffer */ | |
4a4d2cfd TI |
190 | struct snd_pcm_substream *substream; |
191 | }; | |
1da177e4 | 192 | |
1da177e4 | 193 | |
4a4d2cfd | 194 | static inline void snd_card_dummy_pcm_timer_start(struct snd_dummy_pcm *dpcm) |
1da177e4 | 195 | { |
1da177e4 LT |
196 | dpcm->timer.expires = 1 + jiffies; |
197 | add_timer(&dpcm->timer); | |
198 | } | |
199 | ||
4a4d2cfd | 200 | static inline void snd_card_dummy_pcm_timer_stop(struct snd_dummy_pcm *dpcm) |
1da177e4 | 201 | { |
1da177e4 LT |
202 | del_timer(&dpcm->timer); |
203 | } | |
204 | ||
4a4d2cfd | 205 | static int snd_card_dummy_pcm_trigger(struct snd_pcm_substream *substream, int cmd) |
1da177e4 | 206 | { |
4a4d2cfd TI |
207 | struct snd_pcm_runtime *runtime = substream->runtime; |
208 | struct snd_dummy_pcm *dpcm = runtime->private_data; | |
c8eb6ba1 | 209 | int err = 0; |
1da177e4 | 210 | |
c8eb6ba1 | 211 | spin_lock(&dpcm->lock); |
6e65c1cc TI |
212 | switch (cmd) { |
213 | case SNDRV_PCM_TRIGGER_START: | |
214 | case SNDRV_PCM_TRIGGER_RESUME: | |
c8eb6ba1 | 215 | snd_card_dummy_pcm_timer_start(dpcm); |
6e65c1cc TI |
216 | break; |
217 | case SNDRV_PCM_TRIGGER_STOP: | |
218 | case SNDRV_PCM_TRIGGER_SUSPEND: | |
c8eb6ba1 | 219 | snd_card_dummy_pcm_timer_stop(dpcm); |
6e65c1cc TI |
220 | break; |
221 | default: | |
c8eb6ba1 | 222 | err = -EINVAL; |
6e65c1cc | 223 | break; |
1da177e4 | 224 | } |
c8eb6ba1 | 225 | spin_unlock(&dpcm->lock); |
6e65c1cc | 226 | return 0; |
1da177e4 LT |
227 | } |
228 | ||
4a4d2cfd | 229 | static int snd_card_dummy_pcm_prepare(struct snd_pcm_substream *substream) |
1da177e4 | 230 | { |
4a4d2cfd TI |
231 | struct snd_pcm_runtime *runtime = substream->runtime; |
232 | struct snd_dummy_pcm *dpcm = runtime->private_data; | |
1da177e4 LT |
233 | unsigned int bps; |
234 | ||
235 | bps = runtime->rate * runtime->channels; | |
236 | bps *= snd_pcm_format_width(runtime->format); | |
237 | bps /= 8; | |
238 | if (bps <= 0) | |
239 | return -EINVAL; | |
240 | dpcm->pcm_bps = bps; | |
241 | dpcm->pcm_jiffie = bps / HZ; | |
242 | dpcm->pcm_size = snd_pcm_lib_buffer_bytes(substream); | |
243 | dpcm->pcm_count = snd_pcm_lib_period_bytes(substream); | |
244 | dpcm->pcm_irq_pos = 0; | |
245 | dpcm->pcm_buf_pos = 0; | |
246 | return 0; | |
247 | } | |
248 | ||
1da177e4 LT |
249 | static void snd_card_dummy_pcm_timer_function(unsigned long data) |
250 | { | |
4a4d2cfd | 251 | struct snd_dummy_pcm *dpcm = (struct snd_dummy_pcm *)data; |
b32425ac | 252 | unsigned long flags; |
1da177e4 | 253 | |
b32425ac | 254 | spin_lock_irqsave(&dpcm->lock, flags); |
1da177e4 LT |
255 | dpcm->timer.expires = 1 + jiffies; |
256 | add_timer(&dpcm->timer); | |
1da177e4 LT |
257 | dpcm->pcm_irq_pos += dpcm->pcm_jiffie; |
258 | dpcm->pcm_buf_pos += dpcm->pcm_jiffie; | |
259 | dpcm->pcm_buf_pos %= dpcm->pcm_size; | |
260 | if (dpcm->pcm_irq_pos >= dpcm->pcm_count) { | |
261 | dpcm->pcm_irq_pos %= dpcm->pcm_count; | |
b32425ac | 262 | spin_unlock_irqrestore(&dpcm->lock, flags); |
1da177e4 | 263 | snd_pcm_period_elapsed(dpcm->substream); |
b32425ac TI |
264 | } else |
265 | spin_unlock_irqrestore(&dpcm->lock, flags); | |
1da177e4 LT |
266 | } |
267 | ||
4a4d2cfd | 268 | static snd_pcm_uframes_t snd_card_dummy_pcm_pointer(struct snd_pcm_substream *substream) |
1da177e4 | 269 | { |
4a4d2cfd TI |
270 | struct snd_pcm_runtime *runtime = substream->runtime; |
271 | struct snd_dummy_pcm *dpcm = runtime->private_data; | |
1da177e4 LT |
272 | |
273 | return bytes_to_frames(runtime, dpcm->pcm_buf_pos); | |
274 | } | |
275 | ||
4a4d2cfd | 276 | static struct snd_pcm_hardware snd_card_dummy_playback = |
1da177e4 LT |
277 | { |
278 | .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED | | |
6e65c1cc | 279 | SNDRV_PCM_INFO_RESUME | SNDRV_PCM_INFO_MMAP_VALID), |
1da177e4 LT |
280 | .formats = USE_FORMATS, |
281 | .rates = USE_RATE, | |
282 | .rate_min = USE_RATE_MIN, | |
283 | .rate_max = USE_RATE_MAX, | |
284 | .channels_min = USE_CHANNELS_MIN, | |
285 | .channels_max = USE_CHANNELS_MAX, | |
286 | .buffer_bytes_max = MAX_BUFFER_SIZE, | |
287 | .period_bytes_min = 64, | |
288 | .period_bytes_max = MAX_BUFFER_SIZE, | |
289 | .periods_min = USE_PERIODS_MIN, | |
290 | .periods_max = USE_PERIODS_MAX, | |
291 | .fifo_size = 0, | |
292 | }; | |
293 | ||
4a4d2cfd | 294 | static struct snd_pcm_hardware snd_card_dummy_capture = |
1da177e4 LT |
295 | { |
296 | .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED | | |
6e65c1cc | 297 | SNDRV_PCM_INFO_RESUME | SNDRV_PCM_INFO_MMAP_VALID), |
1da177e4 LT |
298 | .formats = USE_FORMATS, |
299 | .rates = USE_RATE, | |
300 | .rate_min = USE_RATE_MIN, | |
301 | .rate_max = USE_RATE_MAX, | |
302 | .channels_min = USE_CHANNELS_MIN, | |
303 | .channels_max = USE_CHANNELS_MAX, | |
304 | .buffer_bytes_max = MAX_BUFFER_SIZE, | |
305 | .period_bytes_min = 64, | |
2ad5dd8d | 306 | .period_bytes_max = MAX_PERIOD_SIZE, |
1da177e4 LT |
307 | .periods_min = USE_PERIODS_MIN, |
308 | .periods_max = USE_PERIODS_MAX, | |
309 | .fifo_size = 0, | |
310 | }; | |
311 | ||
4a4d2cfd | 312 | static void snd_card_dummy_runtime_free(struct snd_pcm_runtime *runtime) |
1da177e4 | 313 | { |
c8eb6ba1 | 314 | kfree(runtime->private_data); |
1da177e4 LT |
315 | } |
316 | ||
4a4d2cfd TI |
317 | static int snd_card_dummy_hw_params(struct snd_pcm_substream *substream, |
318 | struct snd_pcm_hw_params *hw_params) | |
1da177e4 LT |
319 | { |
320 | return snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params)); | |
321 | } | |
322 | ||
4a4d2cfd | 323 | static int snd_card_dummy_hw_free(struct snd_pcm_substream *substream) |
1da177e4 LT |
324 | { |
325 | return snd_pcm_lib_free_pages(substream); | |
326 | } | |
327 | ||
4a4d2cfd | 328 | static struct snd_dummy_pcm *new_pcm_stream(struct snd_pcm_substream *substream) |
1da177e4 | 329 | { |
4a4d2cfd | 330 | struct snd_dummy_pcm *dpcm; |
1da177e4 | 331 | |
561b220a | 332 | dpcm = kzalloc(sizeof(*dpcm), GFP_KERNEL); |
c8eb6ba1 TI |
333 | if (! dpcm) |
334 | return dpcm; | |
1da177e4 LT |
335 | init_timer(&dpcm->timer); |
336 | dpcm->timer.data = (unsigned long) dpcm; | |
337 | dpcm->timer.function = snd_card_dummy_pcm_timer_function; | |
338 | spin_lock_init(&dpcm->lock); | |
339 | dpcm->substream = substream; | |
c8eb6ba1 TI |
340 | return dpcm; |
341 | } | |
342 | ||
4a4d2cfd | 343 | static int snd_card_dummy_playback_open(struct snd_pcm_substream *substream) |
c8eb6ba1 | 344 | { |
4a4d2cfd TI |
345 | struct snd_pcm_runtime *runtime = substream->runtime; |
346 | struct snd_dummy_pcm *dpcm; | |
c8eb6ba1 TI |
347 | int err; |
348 | ||
349 | if ((dpcm = new_pcm_stream(substream)) == NULL) | |
350 | return -ENOMEM; | |
1da177e4 LT |
351 | runtime->private_data = dpcm; |
352 | runtime->private_free = snd_card_dummy_runtime_free; | |
353 | runtime->hw = snd_card_dummy_playback; | |
354 | if (substream->pcm->device & 1) { | |
355 | runtime->hw.info &= ~SNDRV_PCM_INFO_INTERLEAVED; | |
356 | runtime->hw.info |= SNDRV_PCM_INFO_NONINTERLEAVED; | |
357 | } | |
358 | if (substream->pcm->device & 2) | |
359 | runtime->hw.info &= ~(SNDRV_PCM_INFO_MMAP|SNDRV_PCM_INFO_MMAP_VALID); | |
360 | if ((err = add_playback_constraints(runtime)) < 0) { | |
361 | kfree(dpcm); | |
362 | return err; | |
363 | } | |
364 | ||
365 | return 0; | |
366 | } | |
367 | ||
4a4d2cfd | 368 | static int snd_card_dummy_capture_open(struct snd_pcm_substream *substream) |
1da177e4 | 369 | { |
4a4d2cfd TI |
370 | struct snd_pcm_runtime *runtime = substream->runtime; |
371 | struct snd_dummy_pcm *dpcm; | |
1da177e4 LT |
372 | int err; |
373 | ||
c8eb6ba1 | 374 | if ((dpcm = new_pcm_stream(substream)) == NULL) |
1da177e4 | 375 | return -ENOMEM; |
1da177e4 LT |
376 | runtime->private_data = dpcm; |
377 | runtime->private_free = snd_card_dummy_runtime_free; | |
378 | runtime->hw = snd_card_dummy_capture; | |
379 | if (substream->pcm->device == 1) { | |
380 | runtime->hw.info &= ~SNDRV_PCM_INFO_INTERLEAVED; | |
381 | runtime->hw.info |= SNDRV_PCM_INFO_NONINTERLEAVED; | |
382 | } | |
383 | if (substream->pcm->device & 2) | |
384 | runtime->hw.info &= ~(SNDRV_PCM_INFO_MMAP|SNDRV_PCM_INFO_MMAP_VALID); | |
385 | if ((err = add_capture_constraints(runtime)) < 0) { | |
386 | kfree(dpcm); | |
387 | return err; | |
388 | } | |
389 | ||
390 | return 0; | |
391 | } | |
392 | ||
4a4d2cfd | 393 | static int snd_card_dummy_playback_close(struct snd_pcm_substream *substream) |
1da177e4 LT |
394 | { |
395 | return 0; | |
396 | } | |
397 | ||
4a4d2cfd | 398 | static int snd_card_dummy_capture_close(struct snd_pcm_substream *substream) |
1da177e4 LT |
399 | { |
400 | return 0; | |
401 | } | |
402 | ||
4a4d2cfd | 403 | static struct snd_pcm_ops snd_card_dummy_playback_ops = { |
1da177e4 LT |
404 | .open = snd_card_dummy_playback_open, |
405 | .close = snd_card_dummy_playback_close, | |
406 | .ioctl = snd_pcm_lib_ioctl, | |
407 | .hw_params = snd_card_dummy_hw_params, | |
408 | .hw_free = snd_card_dummy_hw_free, | |
c8eb6ba1 TI |
409 | .prepare = snd_card_dummy_pcm_prepare, |
410 | .trigger = snd_card_dummy_pcm_trigger, | |
411 | .pointer = snd_card_dummy_pcm_pointer, | |
1da177e4 LT |
412 | }; |
413 | ||
4a4d2cfd | 414 | static struct snd_pcm_ops snd_card_dummy_capture_ops = { |
1da177e4 LT |
415 | .open = snd_card_dummy_capture_open, |
416 | .close = snd_card_dummy_capture_close, | |
417 | .ioctl = snd_pcm_lib_ioctl, | |
418 | .hw_params = snd_card_dummy_hw_params, | |
419 | .hw_free = snd_card_dummy_hw_free, | |
c8eb6ba1 TI |
420 | .prepare = snd_card_dummy_pcm_prepare, |
421 | .trigger = snd_card_dummy_pcm_trigger, | |
422 | .pointer = snd_card_dummy_pcm_pointer, | |
1da177e4 LT |
423 | }; |
424 | ||
4a4d2cfd | 425 | static int __init snd_card_dummy_pcm(struct snd_dummy *dummy, int device, int substreams) |
1da177e4 | 426 | { |
4a4d2cfd | 427 | struct snd_pcm *pcm; |
1da177e4 LT |
428 | int err; |
429 | ||
4a4d2cfd TI |
430 | if ((err = snd_pcm_new(dummy->card, "Dummy PCM", device, |
431 | substreams, substreams, &pcm)) < 0) | |
1da177e4 | 432 | return err; |
6e65c1cc | 433 | dummy->pcm = pcm; |
1da177e4 LT |
434 | snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_card_dummy_playback_ops); |
435 | snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_card_dummy_capture_ops); | |
436 | pcm->private_data = dummy; | |
437 | pcm->info_flags = 0; | |
438 | strcpy(pcm->name, "Dummy PCM"); | |
439 | snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_CONTINUOUS, | |
440 | snd_dma_continuous_data(GFP_KERNEL), | |
441 | 0, 64*1024); | |
442 | return 0; | |
443 | } | |
444 | ||
445 | #define DUMMY_VOLUME(xname, xindex, addr) \ | |
446 | { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \ | |
447 | .info = snd_dummy_volume_info, \ | |
448 | .get = snd_dummy_volume_get, .put = snd_dummy_volume_put, \ | |
449 | .private_value = addr } | |
450 | ||
4a4d2cfd TI |
451 | static int snd_dummy_volume_info(struct snd_kcontrol *kcontrol, |
452 | struct snd_ctl_elem_info *uinfo) | |
1da177e4 LT |
453 | { |
454 | uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; | |
455 | uinfo->count = 2; | |
456 | uinfo->value.integer.min = -50; | |
457 | uinfo->value.integer.max = 100; | |
458 | return 0; | |
459 | } | |
460 | ||
4a4d2cfd TI |
461 | static int snd_dummy_volume_get(struct snd_kcontrol *kcontrol, |
462 | struct snd_ctl_elem_value *ucontrol) | |
1da177e4 | 463 | { |
4a4d2cfd | 464 | struct snd_dummy *dummy = snd_kcontrol_chip(kcontrol); |
1da177e4 LT |
465 | int addr = kcontrol->private_value; |
466 | ||
c8eb6ba1 | 467 | spin_lock_irq(&dummy->mixer_lock); |
1da177e4 LT |
468 | ucontrol->value.integer.value[0] = dummy->mixer_volume[addr][0]; |
469 | ucontrol->value.integer.value[1] = dummy->mixer_volume[addr][1]; | |
c8eb6ba1 | 470 | spin_unlock_irq(&dummy->mixer_lock); |
1da177e4 LT |
471 | return 0; |
472 | } | |
473 | ||
4a4d2cfd TI |
474 | static int snd_dummy_volume_put(struct snd_kcontrol *kcontrol, |
475 | struct snd_ctl_elem_value *ucontrol) | |
1da177e4 | 476 | { |
4a4d2cfd | 477 | struct snd_dummy *dummy = snd_kcontrol_chip(kcontrol); |
1da177e4 LT |
478 | int change, addr = kcontrol->private_value; |
479 | int left, right; | |
480 | ||
481 | left = ucontrol->value.integer.value[0]; | |
482 | if (left < -50) | |
483 | left = -50; | |
484 | if (left > 100) | |
485 | left = 100; | |
486 | right = ucontrol->value.integer.value[1]; | |
487 | if (right < -50) | |
488 | right = -50; | |
489 | if (right > 100) | |
490 | right = 100; | |
c8eb6ba1 | 491 | spin_lock_irq(&dummy->mixer_lock); |
1da177e4 LT |
492 | change = dummy->mixer_volume[addr][0] != left || |
493 | dummy->mixer_volume[addr][1] != right; | |
494 | dummy->mixer_volume[addr][0] = left; | |
495 | dummy->mixer_volume[addr][1] = right; | |
c8eb6ba1 | 496 | spin_unlock_irq(&dummy->mixer_lock); |
1da177e4 LT |
497 | return change; |
498 | } | |
499 | ||
500 | #define DUMMY_CAPSRC(xname, xindex, addr) \ | |
501 | { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \ | |
502 | .info = snd_dummy_capsrc_info, \ | |
503 | .get = snd_dummy_capsrc_get, .put = snd_dummy_capsrc_put, \ | |
504 | .private_value = addr } | |
505 | ||
4a4d2cfd TI |
506 | static int snd_dummy_capsrc_info(struct snd_kcontrol *kcontrol, |
507 | struct snd_ctl_elem_info *uinfo) | |
1da177e4 LT |
508 | { |
509 | uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN; | |
510 | uinfo->count = 2; | |
511 | uinfo->value.integer.min = 0; | |
512 | uinfo->value.integer.max = 1; | |
513 | return 0; | |
514 | } | |
515 | ||
4a4d2cfd TI |
516 | static int snd_dummy_capsrc_get(struct snd_kcontrol *kcontrol, |
517 | struct snd_ctl_elem_value *ucontrol) | |
1da177e4 | 518 | { |
4a4d2cfd | 519 | struct snd_dummy *dummy = snd_kcontrol_chip(kcontrol); |
1da177e4 LT |
520 | int addr = kcontrol->private_value; |
521 | ||
c8eb6ba1 | 522 | spin_lock_irq(&dummy->mixer_lock); |
1da177e4 LT |
523 | ucontrol->value.integer.value[0] = dummy->capture_source[addr][0]; |
524 | ucontrol->value.integer.value[1] = dummy->capture_source[addr][1]; | |
c8eb6ba1 | 525 | spin_unlock_irq(&dummy->mixer_lock); |
1da177e4 LT |
526 | return 0; |
527 | } | |
528 | ||
4a4d2cfd | 529 | static int snd_dummy_capsrc_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) |
1da177e4 | 530 | { |
4a4d2cfd | 531 | struct snd_dummy *dummy = snd_kcontrol_chip(kcontrol); |
1da177e4 LT |
532 | int change, addr = kcontrol->private_value; |
533 | int left, right; | |
534 | ||
535 | left = ucontrol->value.integer.value[0] & 1; | |
536 | right = ucontrol->value.integer.value[1] & 1; | |
c8eb6ba1 | 537 | spin_lock_irq(&dummy->mixer_lock); |
1da177e4 LT |
538 | change = dummy->capture_source[addr][0] != left && |
539 | dummy->capture_source[addr][1] != right; | |
540 | dummy->capture_source[addr][0] = left; | |
541 | dummy->capture_source[addr][1] = right; | |
c8eb6ba1 | 542 | spin_unlock_irq(&dummy->mixer_lock); |
1da177e4 LT |
543 | return change; |
544 | } | |
545 | ||
4a4d2cfd | 546 | static struct snd_kcontrol_new snd_dummy_controls[] = { |
1da177e4 LT |
547 | DUMMY_VOLUME("Master Volume", 0, MIXER_ADDR_MASTER), |
548 | DUMMY_CAPSRC("Master Capture Switch", 0, MIXER_ADDR_MASTER), | |
549 | DUMMY_VOLUME("Synth Volume", 0, MIXER_ADDR_SYNTH), | |
550 | DUMMY_CAPSRC("Synth Capture Switch", 0, MIXER_ADDR_MASTER), | |
551 | DUMMY_VOLUME("Line Volume", 0, MIXER_ADDR_LINE), | |
552 | DUMMY_CAPSRC("Line Capture Switch", 0, MIXER_ADDR_MASTER), | |
553 | DUMMY_VOLUME("Mic Volume", 0, MIXER_ADDR_MIC), | |
554 | DUMMY_CAPSRC("Mic Capture Switch", 0, MIXER_ADDR_MASTER), | |
555 | DUMMY_VOLUME("CD Volume", 0, MIXER_ADDR_CD), | |
556 | DUMMY_CAPSRC("CD Capture Switch", 0, MIXER_ADDR_MASTER) | |
557 | }; | |
558 | ||
4a4d2cfd | 559 | static int __init snd_card_dummy_new_mixer(struct snd_dummy *dummy) |
1da177e4 | 560 | { |
4a4d2cfd | 561 | struct snd_card *card = dummy->card; |
1da177e4 LT |
562 | unsigned int idx; |
563 | int err; | |
564 | ||
565 | snd_assert(dummy != NULL, return -EINVAL); | |
566 | spin_lock_init(&dummy->mixer_lock); | |
567 | strcpy(card->mixername, "Dummy Mixer"); | |
568 | ||
569 | for (idx = 0; idx < ARRAY_SIZE(snd_dummy_controls); idx++) { | |
570 | if ((err = snd_ctl_add(card, snd_ctl_new1(&snd_dummy_controls[idx], dummy))) < 0) | |
571 | return err; | |
572 | } | |
573 | return 0; | |
574 | } | |
575 | ||
6e65c1cc | 576 | static int __init snd_dummy_probe(struct platform_device *devptr) |
1da177e4 | 577 | { |
4a4d2cfd TI |
578 | struct snd_card *card; |
579 | struct snd_dummy *dummy; | |
1da177e4 | 580 | int idx, err; |
6e65c1cc | 581 | int dev = devptr->id; |
1da177e4 | 582 | |
1da177e4 | 583 | card = snd_card_new(index[dev], id[dev], THIS_MODULE, |
4a4d2cfd | 584 | sizeof(struct snd_dummy)); |
1da177e4 LT |
585 | if (card == NULL) |
586 | return -ENOMEM; | |
4a4d2cfd | 587 | dummy = card->private_data; |
1da177e4 LT |
588 | dummy->card = card; |
589 | for (idx = 0; idx < MAX_PCM_DEVICES && idx < pcm_devs[dev]; idx++) { | |
590 | if (pcm_substreams[dev] < 1) | |
591 | pcm_substreams[dev] = 1; | |
592 | if (pcm_substreams[dev] > MAX_PCM_SUBSTREAMS) | |
593 | pcm_substreams[dev] = MAX_PCM_SUBSTREAMS; | |
594 | if ((err = snd_card_dummy_pcm(dummy, idx, pcm_substreams[dev])) < 0) | |
595 | goto __nodev; | |
596 | } | |
597 | if ((err = snd_card_dummy_new_mixer(dummy)) < 0) | |
598 | goto __nodev; | |
599 | strcpy(card->driver, "Dummy"); | |
600 | strcpy(card->shortname, "Dummy"); | |
601 | sprintf(card->longname, "Dummy %i", dev + 1); | |
16dab54b | 602 | |
6e65c1cc | 603 | snd_card_set_dev(card, &devptr->dev); |
16dab54b | 604 | |
1da177e4 | 605 | if ((err = snd_card_register(card)) == 0) { |
6e65c1cc | 606 | platform_set_drvdata(devptr, card); |
1da177e4 LT |
607 | return 0; |
608 | } | |
609 | __nodev: | |
610 | snd_card_free(card); | |
611 | return err; | |
612 | } | |
613 | ||
6e65c1cc TI |
614 | static int snd_dummy_remove(struct platform_device *devptr) |
615 | { | |
616 | snd_card_free(platform_get_drvdata(devptr)); | |
617 | platform_set_drvdata(devptr, NULL); | |
618 | return 0; | |
619 | } | |
620 | ||
621 | #ifdef CONFIG_PM | |
622 | static int snd_dummy_suspend(struct platform_device *pdev, pm_message_t state) | |
1da177e4 | 623 | { |
6e65c1cc TI |
624 | struct snd_card *card = platform_get_drvdata(pdev); |
625 | struct snd_dummy *dummy = card->private_data; | |
1da177e4 | 626 | |
6e65c1cc TI |
627 | snd_power_change_state(card, SNDRV_CTL_POWER_D3hot); |
628 | snd_pcm_suspend_all(dummy->pcm); | |
629 | return 0; | |
630 | } | |
631 | ||
632 | static int snd_dummy_resume(struct platform_device *pdev) | |
633 | { | |
634 | struct snd_card *card = platform_get_drvdata(pdev); | |
635 | ||
636 | snd_power_change_state(card, SNDRV_CTL_POWER_D0); | |
637 | return 0; | |
638 | } | |
639 | #endif | |
640 | ||
641 | #define SND_DUMMY_DRIVER "snd_dummy" | |
642 | ||
643 | static struct platform_driver snd_dummy_driver = { | |
644 | .probe = snd_dummy_probe, | |
645 | .remove = snd_dummy_remove, | |
646 | #ifdef CONFIG_PM | |
647 | .suspend = snd_dummy_suspend, | |
648 | .resume = snd_dummy_resume, | |
1da177e4 | 649 | #endif |
6e65c1cc TI |
650 | .driver = { |
651 | .name = SND_DUMMY_DRIVER | |
652 | }, | |
653 | }; | |
654 | ||
f7a9275d CL |
655 | static void __init_or_module snd_dummy_unregister_all(void) |
656 | { | |
657 | int i; | |
658 | ||
659 | for (i = 0; i < ARRAY_SIZE(devices); ++i) | |
660 | platform_device_unregister(devices[i]); | |
661 | platform_driver_unregister(&snd_dummy_driver); | |
662 | } | |
663 | ||
6e65c1cc TI |
664 | static int __init alsa_card_dummy_init(void) |
665 | { | |
666 | int i, cards, err; | |
667 | ||
668 | if ((err = platform_driver_register(&snd_dummy_driver)) < 0) | |
669 | return err; | |
670 | ||
671 | cards = 0; | |
8278ca8f | 672 | for (i = 0; i < SNDRV_CARDS; i++) { |
6e65c1cc | 673 | struct platform_device *device; |
8278ca8f TI |
674 | if (! enable[i]) |
675 | continue; | |
6e65c1cc TI |
676 | device = platform_device_register_simple(SND_DUMMY_DRIVER, |
677 | i, NULL, 0); | |
678 | if (IS_ERR(device)) { | |
679 | err = PTR_ERR(device); | |
680 | goto errout; | |
1da177e4 | 681 | } |
f7a9275d | 682 | devices[i] = device; |
1da177e4 LT |
683 | cards++; |
684 | } | |
685 | if (!cards) { | |
686 | #ifdef MODULE | |
687 | printk(KERN_ERR "Dummy soundcard not found or device busy\n"); | |
688 | #endif | |
6e65c1cc TI |
689 | err = -ENODEV; |
690 | goto errout; | |
1da177e4 LT |
691 | } |
692 | return 0; | |
6e65c1cc TI |
693 | |
694 | errout: | |
f7a9275d | 695 | snd_dummy_unregister_all(); |
6e65c1cc | 696 | return err; |
1da177e4 LT |
697 | } |
698 | ||
699 | static void __exit alsa_card_dummy_exit(void) | |
700 | { | |
f7a9275d | 701 | snd_dummy_unregister_all(); |
1da177e4 LT |
702 | } |
703 | ||
704 | module_init(alsa_card_dummy_init) | |
705 | module_exit(alsa_card_dummy_exit) |