blob: a0f28f51fc7eb89c0b7ea30da694a224390df8b8 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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>
Takashi Iwai6e65c1c2005-11-17 16:01:56 +010023#include <linux/err.h>
24#include <linux/platform_device.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070025#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>
Takashi Iwaifb567a82006-08-23 13:07:19 +020032#include <sound/tlv.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070033#include <sound/pcm.h>
34#include <sound/rawmidi.h>
35#include <sound/initval.h>
36
37MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>");
38MODULE_DESCRIPTION("Dummy soundcard (/dev/null)");
39MODULE_LICENSE("GPL");
40MODULE_SUPPORTED_DEVICE("{{ALSA,Dummy soundcard}}");
41
42#define MAX_PCM_DEVICES 4
43#define MAX_PCM_SUBSTREAMS 16
44#define MAX_MIDI_DEVICES 2
45
46#if 0 /* emu10k1 emulation */
47#define MAX_BUFFER_SIZE (128 * 1024)
Takashi Iwai4a4d2cf2005-11-17 14:27:28 +010048static int emu10k1_playback_constraints(struct snd_pcm_runtime *runtime)
Linus Torvalds1da177e2005-04-16 15:20:36 -070049{
50 int err;
51 if ((err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
52 return err;
53 if ((err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 256, UINT_MAX)) < 0)
54 return err;
55 return 0;
56}
57#define add_playback_constraints emu10k1_playback_constraints
58#endif
59
60#if 0 /* RME9652 emulation */
61#define MAX_BUFFER_SIZE (26 * 64 * 1024)
62#define USE_FORMATS SNDRV_PCM_FMTBIT_S32_LE
63#define USE_CHANNELS_MIN 26
64#define USE_CHANNELS_MAX 26
65#define USE_PERIODS_MIN 2
66#define USE_PERIODS_MAX 2
67#endif
68
69#if 0 /* ICE1712 emulation */
70#define MAX_BUFFER_SIZE (256 * 1024)
71#define USE_FORMATS SNDRV_PCM_FMTBIT_S32_LE
72#define USE_CHANNELS_MIN 10
73#define USE_CHANNELS_MAX 10
74#define USE_PERIODS_MIN 1
75#define USE_PERIODS_MAX 1024
76#endif
77
78#if 0 /* UDA1341 emulation */
79#define MAX_BUFFER_SIZE (16380)
80#define USE_FORMATS SNDRV_PCM_FMTBIT_S16_LE
81#define USE_CHANNELS_MIN 2
82#define USE_CHANNELS_MAX 2
83#define USE_PERIODS_MIN 2
84#define USE_PERIODS_MAX 255
85#endif
86
87#if 0 /* simple AC97 bridge (intel8x0) with 48kHz AC97 only codec */
88#define USE_FORMATS SNDRV_PCM_FMTBIT_S16_LE
89#define USE_CHANNELS_MIN 2
90#define USE_CHANNELS_MAX 2
91#define USE_RATE SNDRV_PCM_RATE_48000
92#define USE_RATE_MIN 48000
93#define USE_RATE_MAX 48000
94#endif
95
Jaroslav Kysela2ad5dd82006-01-03 14:27:21 +010096#if 0 /* CA0106 */
97#define USE_FORMATS SNDRV_PCM_FMTBIT_S16_LE
98#define USE_CHANNELS_MIN 2
99#define USE_CHANNELS_MAX 2
100#define USE_RATE (SNDRV_PCM_RATE_48000|SNDRV_PCM_RATE_96000|SNDRV_PCM_RATE_192000)
101#define USE_RATE_MIN 48000
102#define USE_RATE_MAX 192000
103#define MAX_BUFFER_SIZE ((65536-64)*8)
104#define MAX_PERIOD_SIZE (65536-64)
105#define USE_PERIODS_MIN 2
106#define USE_PERIODS_MAX 8
107#endif
108
Linus Torvalds1da177e2005-04-16 15:20:36 -0700109
110/* defaults */
111#ifndef MAX_BUFFER_SIZE
112#define MAX_BUFFER_SIZE (64*1024)
113#endif
Jaroslav Kysela2ad5dd82006-01-03 14:27:21 +0100114#ifndef MAX_PERIOD_SIZE
115#define MAX_PERIOD_SIZE MAX_BUFFER_SIZE
116#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700117#ifndef USE_FORMATS
118#define USE_FORMATS (SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE)
119#endif
120#ifndef USE_RATE
121#define USE_RATE SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_48000
122#define USE_RATE_MIN 5500
123#define USE_RATE_MAX 48000
124#endif
125#ifndef USE_CHANNELS_MIN
126#define USE_CHANNELS_MIN 1
127#endif
128#ifndef USE_CHANNELS_MAX
129#define USE_CHANNELS_MAX 2
130#endif
131#ifndef USE_PERIODS_MIN
132#define USE_PERIODS_MIN 1
133#endif
134#ifndef USE_PERIODS_MAX
135#define USE_PERIODS_MAX 1024
136#endif
137#ifndef add_playback_constraints
138#define add_playback_constraints(x) 0
139#endif
140#ifndef add_capture_constraints
141#define add_capture_constraints(x) 0
142#endif
143
144static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-MAX */
145static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* ID for this card */
146static int enable[SNDRV_CARDS] = {1, [1 ... (SNDRV_CARDS - 1)] = 0};
147static int pcm_devs[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 1};
148static int pcm_substreams[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 8};
149//static int midi_devs[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 2};
150
151module_param_array(index, int, NULL, 0444);
152MODULE_PARM_DESC(index, "Index value for dummy soundcard.");
153module_param_array(id, charp, NULL, 0444);
154MODULE_PARM_DESC(id, "ID string for dummy soundcard.");
155module_param_array(enable, bool, NULL, 0444);
156MODULE_PARM_DESC(enable, "Enable this dummy soundcard.");
157module_param_array(pcm_devs, int, NULL, 0444);
158MODULE_PARM_DESC(pcm_devs, "PCM devices # (0-4) for dummy driver.");
159module_param_array(pcm_substreams, int, NULL, 0444);
160MODULE_PARM_DESC(pcm_substreams, "PCM substreams # (1-16) for dummy driver.");
161//module_param_array(midi_devs, int, NULL, 0444);
162//MODULE_PARM_DESC(midi_devs, "MIDI devices # (0-2) for dummy driver.");
163
Clemens Ladischf7a92752005-12-07 09:13:42 +0100164static struct platform_device *devices[SNDRV_CARDS];
165
Linus Torvalds1da177e2005-04-16 15:20:36 -0700166#define MIXER_ADDR_MASTER 0
167#define MIXER_ADDR_LINE 1
168#define MIXER_ADDR_MIC 2
169#define MIXER_ADDR_SYNTH 3
170#define MIXER_ADDR_CD 4
171#define MIXER_ADDR_LAST 4
172
Takashi Iwai4a4d2cf2005-11-17 14:27:28 +0100173struct snd_dummy {
174 struct snd_card *card;
Takashi Iwai6e65c1c2005-11-17 16:01:56 +0100175 struct snd_pcm *pcm;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700176 spinlock_t mixer_lock;
177 int mixer_volume[MIXER_ADDR_LAST+1][2];
178 int capture_source[MIXER_ADDR_LAST+1][2];
Takashi Iwai4a4d2cf2005-11-17 14:27:28 +0100179};
Linus Torvalds1da177e2005-04-16 15:20:36 -0700180
Takashi Iwai4a4d2cf2005-11-17 14:27:28 +0100181struct snd_dummy_pcm {
182 struct snd_dummy *dummy;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700183 spinlock_t lock;
184 struct timer_list timer;
185 unsigned int pcm_size;
186 unsigned int pcm_count;
187 unsigned int pcm_bps; /* bytes per second */
188 unsigned int pcm_jiffie; /* bytes per one jiffie */
189 unsigned int pcm_irq_pos; /* IRQ position */
190 unsigned int pcm_buf_pos; /* position in buffer */
Takashi Iwai4a4d2cf2005-11-17 14:27:28 +0100191 struct snd_pcm_substream *substream;
192};
Linus Torvalds1da177e2005-04-16 15:20:36 -0700193
Linus Torvalds1da177e2005-04-16 15:20:36 -0700194
Takashi Iwai4a4d2cf2005-11-17 14:27:28 +0100195static inline void snd_card_dummy_pcm_timer_start(struct snd_dummy_pcm *dpcm)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700196{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700197 dpcm->timer.expires = 1 + jiffies;
198 add_timer(&dpcm->timer);
199}
200
Takashi Iwai4a4d2cf2005-11-17 14:27:28 +0100201static inline void snd_card_dummy_pcm_timer_stop(struct snd_dummy_pcm *dpcm)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700202{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700203 del_timer(&dpcm->timer);
204}
205
Takashi Iwai4a4d2cf2005-11-17 14:27:28 +0100206static int snd_card_dummy_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700207{
Takashi Iwai4a4d2cf2005-11-17 14:27:28 +0100208 struct snd_pcm_runtime *runtime = substream->runtime;
209 struct snd_dummy_pcm *dpcm = runtime->private_data;
Takashi Iwaic8eb6ba2005-11-17 10:20:23 +0100210 int err = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700211
Takashi Iwaic8eb6ba2005-11-17 10:20:23 +0100212 spin_lock(&dpcm->lock);
Takashi Iwai6e65c1c2005-11-17 16:01:56 +0100213 switch (cmd) {
214 case SNDRV_PCM_TRIGGER_START:
215 case SNDRV_PCM_TRIGGER_RESUME:
Takashi Iwaic8eb6ba2005-11-17 10:20:23 +0100216 snd_card_dummy_pcm_timer_start(dpcm);
Takashi Iwai6e65c1c2005-11-17 16:01:56 +0100217 break;
218 case SNDRV_PCM_TRIGGER_STOP:
219 case SNDRV_PCM_TRIGGER_SUSPEND:
Takashi Iwaic8eb6ba2005-11-17 10:20:23 +0100220 snd_card_dummy_pcm_timer_stop(dpcm);
Takashi Iwai6e65c1c2005-11-17 16:01:56 +0100221 break;
222 default:
Takashi Iwaic8eb6ba2005-11-17 10:20:23 +0100223 err = -EINVAL;
Takashi Iwai6e65c1c2005-11-17 16:01:56 +0100224 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700225 }
Takashi Iwaic8eb6ba2005-11-17 10:20:23 +0100226 spin_unlock(&dpcm->lock);
Takashi Iwai6e65c1c2005-11-17 16:01:56 +0100227 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700228}
229
Takashi Iwai4a4d2cf2005-11-17 14:27:28 +0100230static int snd_card_dummy_pcm_prepare(struct snd_pcm_substream *substream)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700231{
Takashi Iwai4a4d2cf2005-11-17 14:27:28 +0100232 struct snd_pcm_runtime *runtime = substream->runtime;
233 struct snd_dummy_pcm *dpcm = runtime->private_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700234 unsigned int bps;
235
236 bps = runtime->rate * runtime->channels;
237 bps *= snd_pcm_format_width(runtime->format);
238 bps /= 8;
239 if (bps <= 0)
240 return -EINVAL;
241 dpcm->pcm_bps = bps;
242 dpcm->pcm_jiffie = bps / HZ;
243 dpcm->pcm_size = snd_pcm_lib_buffer_bytes(substream);
244 dpcm->pcm_count = snd_pcm_lib_period_bytes(substream);
245 dpcm->pcm_irq_pos = 0;
246 dpcm->pcm_buf_pos = 0;
247 return 0;
248}
249
Linus Torvalds1da177e2005-04-16 15:20:36 -0700250static void snd_card_dummy_pcm_timer_function(unsigned long data)
251{
Takashi Iwai4a4d2cf2005-11-17 14:27:28 +0100252 struct snd_dummy_pcm *dpcm = (struct snd_dummy_pcm *)data;
Takashi Iwaib32425a2005-11-18 18:52:14 +0100253 unsigned long flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700254
Takashi Iwaib32425a2005-11-18 18:52:14 +0100255 spin_lock_irqsave(&dpcm->lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700256 dpcm->timer.expires = 1 + jiffies;
257 add_timer(&dpcm->timer);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700258 dpcm->pcm_irq_pos += dpcm->pcm_jiffie;
259 dpcm->pcm_buf_pos += dpcm->pcm_jiffie;
260 dpcm->pcm_buf_pos %= dpcm->pcm_size;
261 if (dpcm->pcm_irq_pos >= dpcm->pcm_count) {
262 dpcm->pcm_irq_pos %= dpcm->pcm_count;
Takashi Iwaib32425a2005-11-18 18:52:14 +0100263 spin_unlock_irqrestore(&dpcm->lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700264 snd_pcm_period_elapsed(dpcm->substream);
Takashi Iwaib32425a2005-11-18 18:52:14 +0100265 } else
266 spin_unlock_irqrestore(&dpcm->lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700267}
268
Takashi Iwai4a4d2cf2005-11-17 14:27:28 +0100269static snd_pcm_uframes_t snd_card_dummy_pcm_pointer(struct snd_pcm_substream *substream)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700270{
Takashi Iwai4a4d2cf2005-11-17 14:27:28 +0100271 struct snd_pcm_runtime *runtime = substream->runtime;
272 struct snd_dummy_pcm *dpcm = runtime->private_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700273
274 return bytes_to_frames(runtime, dpcm->pcm_buf_pos);
275}
276
Takashi Iwai4a4d2cf2005-11-17 14:27:28 +0100277static struct snd_pcm_hardware snd_card_dummy_playback =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700278{
279 .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
Takashi Iwai6e65c1c2005-11-17 16:01:56 +0100280 SNDRV_PCM_INFO_RESUME | SNDRV_PCM_INFO_MMAP_VALID),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700281 .formats = USE_FORMATS,
282 .rates = USE_RATE,
283 .rate_min = USE_RATE_MIN,
284 .rate_max = USE_RATE_MAX,
285 .channels_min = USE_CHANNELS_MIN,
286 .channels_max = USE_CHANNELS_MAX,
287 .buffer_bytes_max = MAX_BUFFER_SIZE,
288 .period_bytes_min = 64,
Takashi Iwaie05d6962006-08-17 17:12:19 +0200289 .period_bytes_max = MAX_PERIOD_SIZE,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700290 .periods_min = USE_PERIODS_MIN,
291 .periods_max = USE_PERIODS_MAX,
292 .fifo_size = 0,
293};
294
Takashi Iwai4a4d2cf2005-11-17 14:27:28 +0100295static struct snd_pcm_hardware snd_card_dummy_capture =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700296{
297 .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
Takashi Iwai6e65c1c2005-11-17 16:01:56 +0100298 SNDRV_PCM_INFO_RESUME | SNDRV_PCM_INFO_MMAP_VALID),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700299 .formats = USE_FORMATS,
300 .rates = USE_RATE,
301 .rate_min = USE_RATE_MIN,
302 .rate_max = USE_RATE_MAX,
303 .channels_min = USE_CHANNELS_MIN,
304 .channels_max = USE_CHANNELS_MAX,
305 .buffer_bytes_max = MAX_BUFFER_SIZE,
306 .period_bytes_min = 64,
Jaroslav Kysela2ad5dd82006-01-03 14:27:21 +0100307 .period_bytes_max = MAX_PERIOD_SIZE,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700308 .periods_min = USE_PERIODS_MIN,
309 .periods_max = USE_PERIODS_MAX,
310 .fifo_size = 0,
311};
312
Takashi Iwai4a4d2cf2005-11-17 14:27:28 +0100313static void snd_card_dummy_runtime_free(struct snd_pcm_runtime *runtime)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700314{
Takashi Iwaic8eb6ba2005-11-17 10:20:23 +0100315 kfree(runtime->private_data);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700316}
317
Takashi Iwai4a4d2cf2005-11-17 14:27:28 +0100318static int snd_card_dummy_hw_params(struct snd_pcm_substream *substream,
319 struct snd_pcm_hw_params *hw_params)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700320{
321 return snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params));
322}
323
Takashi Iwai4a4d2cf2005-11-17 14:27:28 +0100324static int snd_card_dummy_hw_free(struct snd_pcm_substream *substream)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700325{
326 return snd_pcm_lib_free_pages(substream);
327}
328
Takashi Iwai4a4d2cf2005-11-17 14:27:28 +0100329static struct snd_dummy_pcm *new_pcm_stream(struct snd_pcm_substream *substream)
Takashi Iwaic8eb6ba2005-11-17 10:20:23 +0100330{
Takashi Iwai4a4d2cf2005-11-17 14:27:28 +0100331 struct snd_dummy_pcm *dpcm;
Takashi Iwaic8eb6ba2005-11-17 10:20:23 +0100332
333 dpcm = kzalloc(sizeof(*dpcm), GFP_KERNEL);
334 if (! dpcm)
335 return dpcm;
336 init_timer(&dpcm->timer);
337 dpcm->timer.data = (unsigned long) dpcm;
338 dpcm->timer.function = snd_card_dummy_pcm_timer_function;
339 spin_lock_init(&dpcm->lock);
340 dpcm->substream = substream;
341 return dpcm;
342}
343
Takashi Iwai4a4d2cf2005-11-17 14:27:28 +0100344static int snd_card_dummy_playback_open(struct snd_pcm_substream *substream)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700345{
Takashi Iwai4a4d2cf2005-11-17 14:27:28 +0100346 struct snd_pcm_runtime *runtime = substream->runtime;
347 struct snd_dummy_pcm *dpcm;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700348 int err;
349
Takashi Iwaic8eb6ba2005-11-17 10:20:23 +0100350 if ((dpcm = new_pcm_stream(substream)) == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700351 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700352 runtime->private_data = dpcm;
353 runtime->private_free = snd_card_dummy_runtime_free;
354 runtime->hw = snd_card_dummy_playback;
355 if (substream->pcm->device & 1) {
356 runtime->hw.info &= ~SNDRV_PCM_INFO_INTERLEAVED;
357 runtime->hw.info |= SNDRV_PCM_INFO_NONINTERLEAVED;
358 }
359 if (substream->pcm->device & 2)
360 runtime->hw.info &= ~(SNDRV_PCM_INFO_MMAP|SNDRV_PCM_INFO_MMAP_VALID);
361 if ((err = add_playback_constraints(runtime)) < 0) {
362 kfree(dpcm);
363 return err;
364 }
365
366 return 0;
367}
368
Takashi Iwai4a4d2cf2005-11-17 14:27:28 +0100369static int snd_card_dummy_capture_open(struct snd_pcm_substream *substream)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700370{
Takashi Iwai4a4d2cf2005-11-17 14:27:28 +0100371 struct snd_pcm_runtime *runtime = substream->runtime;
372 struct snd_dummy_pcm *dpcm;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700373 int err;
374
Takashi Iwaic8eb6ba2005-11-17 10:20:23 +0100375 if ((dpcm = new_pcm_stream(substream)) == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700376 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700377 runtime->private_data = dpcm;
378 runtime->private_free = snd_card_dummy_runtime_free;
379 runtime->hw = snd_card_dummy_capture;
380 if (substream->pcm->device == 1) {
381 runtime->hw.info &= ~SNDRV_PCM_INFO_INTERLEAVED;
382 runtime->hw.info |= SNDRV_PCM_INFO_NONINTERLEAVED;
383 }
384 if (substream->pcm->device & 2)
385 runtime->hw.info &= ~(SNDRV_PCM_INFO_MMAP|SNDRV_PCM_INFO_MMAP_VALID);
386 if ((err = add_capture_constraints(runtime)) < 0) {
387 kfree(dpcm);
388 return err;
389 }
390
391 return 0;
392}
393
Takashi Iwai4a4d2cf2005-11-17 14:27:28 +0100394static int snd_card_dummy_playback_close(struct snd_pcm_substream *substream)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700395{
396 return 0;
397}
398
Takashi Iwai4a4d2cf2005-11-17 14:27:28 +0100399static int snd_card_dummy_capture_close(struct snd_pcm_substream *substream)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700400{
401 return 0;
402}
403
Takashi Iwai4a4d2cf2005-11-17 14:27:28 +0100404static struct snd_pcm_ops snd_card_dummy_playback_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700405 .open = snd_card_dummy_playback_open,
406 .close = snd_card_dummy_playback_close,
407 .ioctl = snd_pcm_lib_ioctl,
408 .hw_params = snd_card_dummy_hw_params,
409 .hw_free = snd_card_dummy_hw_free,
Takashi Iwaic8eb6ba2005-11-17 10:20:23 +0100410 .prepare = snd_card_dummy_pcm_prepare,
411 .trigger = snd_card_dummy_pcm_trigger,
412 .pointer = snd_card_dummy_pcm_pointer,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700413};
414
Takashi Iwai4a4d2cf2005-11-17 14:27:28 +0100415static struct snd_pcm_ops snd_card_dummy_capture_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700416 .open = snd_card_dummy_capture_open,
417 .close = snd_card_dummy_capture_close,
418 .ioctl = snd_pcm_lib_ioctl,
419 .hw_params = snd_card_dummy_hw_params,
420 .hw_free = snd_card_dummy_hw_free,
Takashi Iwaic8eb6ba2005-11-17 10:20:23 +0100421 .prepare = snd_card_dummy_pcm_prepare,
422 .trigger = snd_card_dummy_pcm_trigger,
423 .pointer = snd_card_dummy_pcm_pointer,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700424};
425
Prarit Bhargava788c6042007-02-13 13:11:11 +0100426static int __devinit snd_card_dummy_pcm(struct snd_dummy *dummy, int device,
427 int substreams)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700428{
Takashi Iwai4a4d2cf2005-11-17 14:27:28 +0100429 struct snd_pcm *pcm;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700430 int err;
431
Takashi Iwai4a4d2cf2005-11-17 14:27:28 +0100432 if ((err = snd_pcm_new(dummy->card, "Dummy PCM", device,
433 substreams, substreams, &pcm)) < 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700434 return err;
Takashi Iwai6e65c1c2005-11-17 16:01:56 +0100435 dummy->pcm = pcm;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700436 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_card_dummy_playback_ops);
437 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_card_dummy_capture_ops);
438 pcm->private_data = dummy;
439 pcm->info_flags = 0;
440 strcpy(pcm->name, "Dummy PCM");
441 snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_CONTINUOUS,
442 snd_dma_continuous_data(GFP_KERNEL),
443 0, 64*1024);
444 return 0;
445}
446
447#define DUMMY_VOLUME(xname, xindex, addr) \
Takashi Iwaifb567a82006-08-23 13:07:19 +0200448{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, \
449 .access = SNDRV_CTL_ELEM_ACCESS_READWRITE | SNDRV_CTL_ELEM_ACCESS_TLV_READ, \
450 .name = xname, .index = xindex, \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700451 .info = snd_dummy_volume_info, \
452 .get = snd_dummy_volume_get, .put = snd_dummy_volume_put, \
Takashi Iwaifb567a82006-08-23 13:07:19 +0200453 .private_value = addr, \
454 .tlv = { .p = db_scale_dummy } }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700455
Takashi Iwai4a4d2cf2005-11-17 14:27:28 +0100456static int snd_dummy_volume_info(struct snd_kcontrol *kcontrol,
457 struct snd_ctl_elem_info *uinfo)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700458{
459 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
460 uinfo->count = 2;
461 uinfo->value.integer.min = -50;
462 uinfo->value.integer.max = 100;
463 return 0;
464}
465
Takashi Iwai4a4d2cf2005-11-17 14:27:28 +0100466static int snd_dummy_volume_get(struct snd_kcontrol *kcontrol,
467 struct snd_ctl_elem_value *ucontrol)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700468{
Takashi Iwai4a4d2cf2005-11-17 14:27:28 +0100469 struct snd_dummy *dummy = snd_kcontrol_chip(kcontrol);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700470 int addr = kcontrol->private_value;
471
Takashi Iwaic8eb6ba2005-11-17 10:20:23 +0100472 spin_lock_irq(&dummy->mixer_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700473 ucontrol->value.integer.value[0] = dummy->mixer_volume[addr][0];
474 ucontrol->value.integer.value[1] = dummy->mixer_volume[addr][1];
Takashi Iwaic8eb6ba2005-11-17 10:20:23 +0100475 spin_unlock_irq(&dummy->mixer_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700476 return 0;
477}
478
Takashi Iwai4a4d2cf2005-11-17 14:27:28 +0100479static int snd_dummy_volume_put(struct snd_kcontrol *kcontrol,
480 struct snd_ctl_elem_value *ucontrol)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700481{
Takashi Iwai4a4d2cf2005-11-17 14:27:28 +0100482 struct snd_dummy *dummy = snd_kcontrol_chip(kcontrol);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700483 int change, addr = kcontrol->private_value;
484 int left, right;
485
486 left = ucontrol->value.integer.value[0];
487 if (left < -50)
488 left = -50;
489 if (left > 100)
490 left = 100;
491 right = ucontrol->value.integer.value[1];
492 if (right < -50)
493 right = -50;
494 if (right > 100)
495 right = 100;
Takashi Iwaic8eb6ba2005-11-17 10:20:23 +0100496 spin_lock_irq(&dummy->mixer_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700497 change = dummy->mixer_volume[addr][0] != left ||
498 dummy->mixer_volume[addr][1] != right;
499 dummy->mixer_volume[addr][0] = left;
500 dummy->mixer_volume[addr][1] = right;
Takashi Iwaic8eb6ba2005-11-17 10:20:23 +0100501 spin_unlock_irq(&dummy->mixer_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700502 return change;
503}
504
Takashi Iwai0cb29ea2007-01-29 15:33:49 +0100505static const DECLARE_TLV_DB_SCALE(db_scale_dummy, -4500, 30, 0);
Takashi Iwaifb567a82006-08-23 13:07:19 +0200506
Linus Torvalds1da177e2005-04-16 15:20:36 -0700507#define DUMMY_CAPSRC(xname, xindex, addr) \
508{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
509 .info = snd_dummy_capsrc_info, \
510 .get = snd_dummy_capsrc_get, .put = snd_dummy_capsrc_put, \
511 .private_value = addr }
512
Takashi Iwai4a4d2cf2005-11-17 14:27:28 +0100513static int snd_dummy_capsrc_info(struct snd_kcontrol *kcontrol,
514 struct snd_ctl_elem_info *uinfo)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700515{
516 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
517 uinfo->count = 2;
518 uinfo->value.integer.min = 0;
519 uinfo->value.integer.max = 1;
520 return 0;
521}
522
Takashi Iwai4a4d2cf2005-11-17 14:27:28 +0100523static int snd_dummy_capsrc_get(struct snd_kcontrol *kcontrol,
524 struct snd_ctl_elem_value *ucontrol)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700525{
Takashi Iwai4a4d2cf2005-11-17 14:27:28 +0100526 struct snd_dummy *dummy = snd_kcontrol_chip(kcontrol);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700527 int addr = kcontrol->private_value;
528
Takashi Iwaic8eb6ba2005-11-17 10:20:23 +0100529 spin_lock_irq(&dummy->mixer_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700530 ucontrol->value.integer.value[0] = dummy->capture_source[addr][0];
531 ucontrol->value.integer.value[1] = dummy->capture_source[addr][1];
Takashi Iwaic8eb6ba2005-11-17 10:20:23 +0100532 spin_unlock_irq(&dummy->mixer_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700533 return 0;
534}
535
Takashi Iwai4a4d2cf2005-11-17 14:27:28 +0100536static int snd_dummy_capsrc_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700537{
Takashi Iwai4a4d2cf2005-11-17 14:27:28 +0100538 struct snd_dummy *dummy = snd_kcontrol_chip(kcontrol);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700539 int change, addr = kcontrol->private_value;
540 int left, right;
541
542 left = ucontrol->value.integer.value[0] & 1;
543 right = ucontrol->value.integer.value[1] & 1;
Takashi Iwaic8eb6ba2005-11-17 10:20:23 +0100544 spin_lock_irq(&dummy->mixer_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700545 change = dummy->capture_source[addr][0] != left &&
546 dummy->capture_source[addr][1] != right;
547 dummy->capture_source[addr][0] = left;
548 dummy->capture_source[addr][1] = right;
Takashi Iwaic8eb6ba2005-11-17 10:20:23 +0100549 spin_unlock_irq(&dummy->mixer_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700550 return change;
551}
552
Takashi Iwai4a4d2cf2005-11-17 14:27:28 +0100553static struct snd_kcontrol_new snd_dummy_controls[] = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700554DUMMY_VOLUME("Master Volume", 0, MIXER_ADDR_MASTER),
555DUMMY_CAPSRC("Master Capture Switch", 0, MIXER_ADDR_MASTER),
556DUMMY_VOLUME("Synth Volume", 0, MIXER_ADDR_SYNTH),
Takashi Iwaie05d6962006-08-17 17:12:19 +0200557DUMMY_CAPSRC("Synth Capture Switch", 0, MIXER_ADDR_SYNTH),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700558DUMMY_VOLUME("Line Volume", 0, MIXER_ADDR_LINE),
Takashi Iwaie05d6962006-08-17 17:12:19 +0200559DUMMY_CAPSRC("Line Capture Switch", 0, MIXER_ADDR_LINE),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700560DUMMY_VOLUME("Mic Volume", 0, MIXER_ADDR_MIC),
Takashi Iwaie05d6962006-08-17 17:12:19 +0200561DUMMY_CAPSRC("Mic Capture Switch", 0, MIXER_ADDR_MIC),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700562DUMMY_VOLUME("CD Volume", 0, MIXER_ADDR_CD),
Takashi Iwaie05d6962006-08-17 17:12:19 +0200563DUMMY_CAPSRC("CD Capture Switch", 0, MIXER_ADDR_CD)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700564};
565
Prarit Bhargava788c6042007-02-13 13:11:11 +0100566static int __devinit snd_card_dummy_new_mixer(struct snd_dummy *dummy)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700567{
Takashi Iwai4a4d2cf2005-11-17 14:27:28 +0100568 struct snd_card *card = dummy->card;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700569 unsigned int idx;
570 int err;
571
572 snd_assert(dummy != NULL, return -EINVAL);
573 spin_lock_init(&dummy->mixer_lock);
574 strcpy(card->mixername, "Dummy Mixer");
575
576 for (idx = 0; idx < ARRAY_SIZE(snd_dummy_controls); idx++) {
577 if ((err = snd_ctl_add(card, snd_ctl_new1(&snd_dummy_controls[idx], dummy))) < 0)
578 return err;
579 }
580 return 0;
581}
582
Prarit Bhargava788c6042007-02-13 13:11:11 +0100583static int __devinit snd_dummy_probe(struct platform_device *devptr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700584{
Takashi Iwai4a4d2cf2005-11-17 14:27:28 +0100585 struct snd_card *card;
586 struct snd_dummy *dummy;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700587 int idx, err;
Takashi Iwai6e65c1c2005-11-17 16:01:56 +0100588 int dev = devptr->id;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700589
Linus Torvalds1da177e2005-04-16 15:20:36 -0700590 card = snd_card_new(index[dev], id[dev], THIS_MODULE,
Takashi Iwai4a4d2cf2005-11-17 14:27:28 +0100591 sizeof(struct snd_dummy));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700592 if (card == NULL)
593 return -ENOMEM;
Takashi Iwai4a4d2cf2005-11-17 14:27:28 +0100594 dummy = card->private_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700595 dummy->card = card;
596 for (idx = 0; idx < MAX_PCM_DEVICES && idx < pcm_devs[dev]; idx++) {
597 if (pcm_substreams[dev] < 1)
598 pcm_substreams[dev] = 1;
599 if (pcm_substreams[dev] > MAX_PCM_SUBSTREAMS)
600 pcm_substreams[dev] = MAX_PCM_SUBSTREAMS;
601 if ((err = snd_card_dummy_pcm(dummy, idx, pcm_substreams[dev])) < 0)
602 goto __nodev;
603 }
604 if ((err = snd_card_dummy_new_mixer(dummy)) < 0)
605 goto __nodev;
606 strcpy(card->driver, "Dummy");
607 strcpy(card->shortname, "Dummy");
608 sprintf(card->longname, "Dummy %i", dev + 1);
Takashi Iwai16dab542005-09-05 17:17:58 +0200609
Takashi Iwai6e65c1c2005-11-17 16:01:56 +0100610 snd_card_set_dev(card, &devptr->dev);
Takashi Iwai16dab542005-09-05 17:17:58 +0200611
Linus Torvalds1da177e2005-04-16 15:20:36 -0700612 if ((err = snd_card_register(card)) == 0) {
Takashi Iwai6e65c1c2005-11-17 16:01:56 +0100613 platform_set_drvdata(devptr, card);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700614 return 0;
615 }
616 __nodev:
617 snd_card_free(card);
618 return err;
619}
620
Prarit Bhargava788c6042007-02-13 13:11:11 +0100621static int __devexit snd_dummy_remove(struct platform_device *devptr)
Takashi Iwai6e65c1c2005-11-17 16:01:56 +0100622{
623 snd_card_free(platform_get_drvdata(devptr));
624 platform_set_drvdata(devptr, NULL);
625 return 0;
626}
627
628#ifdef CONFIG_PM
629static int snd_dummy_suspend(struct platform_device *pdev, pm_message_t state)
630{
631 struct snd_card *card = platform_get_drvdata(pdev);
632 struct snd_dummy *dummy = card->private_data;
633
634 snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
635 snd_pcm_suspend_all(dummy->pcm);
636 return 0;
637}
638
639static int snd_dummy_resume(struct platform_device *pdev)
640{
641 struct snd_card *card = platform_get_drvdata(pdev);
642
643 snd_power_change_state(card, SNDRV_CTL_POWER_D0);
644 return 0;
645}
646#endif
647
648#define SND_DUMMY_DRIVER "snd_dummy"
649
650static struct platform_driver snd_dummy_driver = {
651 .probe = snd_dummy_probe,
Prarit Bhargava788c6042007-02-13 13:11:11 +0100652 .remove = __devexit_p(snd_dummy_remove),
Takashi Iwai6e65c1c2005-11-17 16:01:56 +0100653#ifdef CONFIG_PM
654 .suspend = snd_dummy_suspend,
655 .resume = snd_dummy_resume,
656#endif
657 .driver = {
658 .name = SND_DUMMY_DRIVER
659 },
660};
661
Clemens Ladischf7a92752005-12-07 09:13:42 +0100662static void __init_or_module snd_dummy_unregister_all(void)
663{
664 int i;
665
666 for (i = 0; i < ARRAY_SIZE(devices); ++i)
667 platform_device_unregister(devices[i]);
668 platform_driver_unregister(&snd_dummy_driver);
669}
670
Linus Torvalds1da177e2005-04-16 15:20:36 -0700671static int __init alsa_card_dummy_init(void)
672{
Takashi Iwai6e65c1c2005-11-17 16:01:56 +0100673 int i, cards, err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700674
Takashi Iwai6e65c1c2005-11-17 16:01:56 +0100675 if ((err = platform_driver_register(&snd_dummy_driver)) < 0)
676 return err;
677
678 cards = 0;
Takashi Iwai8278ca82006-02-20 11:57:34 +0100679 for (i = 0; i < SNDRV_CARDS; i++) {
Takashi Iwai6e65c1c2005-11-17 16:01:56 +0100680 struct platform_device *device;
Takashi Iwai8278ca82006-02-20 11:57:34 +0100681 if (! enable[i])
682 continue;
Takashi Iwai6e65c1c2005-11-17 16:01:56 +0100683 device = platform_device_register_simple(SND_DUMMY_DRIVER,
684 i, NULL, 0);
Rene Hermana182ee92006-04-13 12:57:11 +0200685 if (IS_ERR(device))
686 continue;
Rene Herman71524472006-04-13 12:58:06 +0200687 if (!platform_get_drvdata(device)) {
688 platform_device_unregister(device);
689 continue;
690 }
Clemens Ladischf7a92752005-12-07 09:13:42 +0100691 devices[i] = device;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700692 cards++;
693 }
694 if (!cards) {
695#ifdef MODULE
696 printk(KERN_ERR "Dummy soundcard not found or device busy\n");
697#endif
Rene Hermana182ee92006-04-13 12:57:11 +0200698 snd_dummy_unregister_all();
699 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700700 }
701 return 0;
702}
703
704static void __exit alsa_card_dummy_exit(void)
705{
Clemens Ladischf7a92752005-12-07 09:13:42 +0100706 snd_dummy_unregister_all();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700707}
708
709module_init(alsa_card_dummy_init)
710module_exit(alsa_card_dummy_exit)