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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * Dummy soundcard
Jaroslav Kyselac1017a42007-10-15 09:50:19 +02003 * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
Linus Torvalds1da177e2005-04-16 15:20:36 -07004 *
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
Linus Torvalds1da177e2005-04-16 15:20:36 -070021#include <linux/init.h>
Takashi Iwai6e65c1c2005-11-17 16:01:56 +010022#include <linux/err.h>
23#include <linux/platform_device.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070024#include <linux/jiffies.h>
25#include <linux/slab.h>
26#include <linux/time.h>
27#include <linux/wait.h>
28#include <linux/moduleparam.h>
29#include <sound/core.h>
30#include <sound/control.h>
Takashi Iwaifb567a82006-08-23 13:07:19 +020031#include <sound/tlv.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070032#include <sound/pcm.h>
33#include <sound/rawmidi.h>
34#include <sound/initval.h>
35
Jaroslav Kyselac1017a42007-10-15 09:50:19 +020036MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
Linus Torvalds1da177e2005-04-16 15:20:36 -070037MODULE_DESCRIPTION("Dummy soundcard (/dev/null)");
38MODULE_LICENSE("GPL");
39MODULE_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)
Takashi Iwai4a4d2cf2005-11-17 14:27:28 +010047static int emu10k1_playback_constraints(struct snd_pcm_runtime *runtime)
Linus Torvalds1da177e2005-04-16 15:20:36 -070048{
49 int err;
Jaroslav Kysela1a11cb62008-08-15 12:59:02 +020050 err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
51 if (err < 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -070052 return err;
Jaroslav Kysela1a11cb62008-08-15 12:59:02 +020053 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 256, UINT_MAX);
Mariusz Kozlowskie78521f2008-10-19 10:34:22 +020054 if (err < 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -070055 return err;
56 return 0;
57}
58#define add_playback_constraints emu10k1_playback_constraints
59#endif
60
61#if 0 /* RME9652 emulation */
62#define MAX_BUFFER_SIZE (26 * 64 * 1024)
63#define USE_FORMATS SNDRV_PCM_FMTBIT_S32_LE
64#define USE_CHANNELS_MIN 26
65#define USE_CHANNELS_MAX 26
66#define USE_PERIODS_MIN 2
67#define USE_PERIODS_MAX 2
68#endif
69
70#if 0 /* ICE1712 emulation */
71#define MAX_BUFFER_SIZE (256 * 1024)
72#define USE_FORMATS SNDRV_PCM_FMTBIT_S32_LE
73#define USE_CHANNELS_MIN 10
74#define USE_CHANNELS_MAX 10
75#define USE_PERIODS_MIN 1
76#define USE_PERIODS_MAX 1024
77#endif
78
79#if 0 /* UDA1341 emulation */
80#define MAX_BUFFER_SIZE (16380)
81#define USE_FORMATS SNDRV_PCM_FMTBIT_S16_LE
82#define USE_CHANNELS_MIN 2
83#define USE_CHANNELS_MAX 2
84#define USE_PERIODS_MIN 2
85#define USE_PERIODS_MAX 255
86#endif
87
88#if 0 /* simple AC97 bridge (intel8x0) with 48kHz AC97 only codec */
89#define USE_FORMATS SNDRV_PCM_FMTBIT_S16_LE
90#define USE_CHANNELS_MIN 2
91#define USE_CHANNELS_MAX 2
92#define USE_RATE SNDRV_PCM_RATE_48000
93#define USE_RATE_MIN 48000
94#define USE_RATE_MAX 48000
95#endif
96
Jaroslav Kysela2ad5dd82006-01-03 14:27:21 +010097#if 0 /* CA0106 */
98#define USE_FORMATS SNDRV_PCM_FMTBIT_S16_LE
99#define USE_CHANNELS_MIN 2
100#define USE_CHANNELS_MAX 2
101#define USE_RATE (SNDRV_PCM_RATE_48000|SNDRV_PCM_RATE_96000|SNDRV_PCM_RATE_192000)
102#define USE_RATE_MIN 48000
103#define USE_RATE_MAX 192000
104#define MAX_BUFFER_SIZE ((65536-64)*8)
105#define MAX_PERIOD_SIZE (65536-64)
106#define USE_PERIODS_MIN 2
107#define USE_PERIODS_MAX 8
108#endif
109
Linus Torvalds1da177e2005-04-16 15:20:36 -0700110
111/* defaults */
112#ifndef MAX_BUFFER_SIZE
113#define MAX_BUFFER_SIZE (64*1024)
114#endif
Jaroslav Kysela2ad5dd82006-01-03 14:27:21 +0100115#ifndef MAX_PERIOD_SIZE
116#define MAX_PERIOD_SIZE MAX_BUFFER_SIZE
117#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700118#ifndef USE_FORMATS
119#define USE_FORMATS (SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE)
120#endif
121#ifndef USE_RATE
122#define USE_RATE SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_48000
123#define USE_RATE_MIN 5500
124#define USE_RATE_MAX 48000
125#endif
126#ifndef USE_CHANNELS_MIN
127#define USE_CHANNELS_MIN 1
128#endif
129#ifndef USE_CHANNELS_MAX
130#define USE_CHANNELS_MAX 2
131#endif
132#ifndef USE_PERIODS_MIN
133#define USE_PERIODS_MIN 1
134#endif
135#ifndef USE_PERIODS_MAX
136#define USE_PERIODS_MAX 1024
137#endif
138#ifndef add_playback_constraints
139#define add_playback_constraints(x) 0
140#endif
141#ifndef add_capture_constraints
142#define add_capture_constraints(x) 0
143#endif
144
145static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-MAX */
146static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* ID for this card */
147static int enable[SNDRV_CARDS] = {1, [1 ... (SNDRV_CARDS - 1)] = 0};
148static int pcm_devs[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 1};
149static int pcm_substreams[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 8};
150//static int midi_devs[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 2};
151
152module_param_array(index, int, NULL, 0444);
153MODULE_PARM_DESC(index, "Index value for dummy soundcard.");
154module_param_array(id, charp, NULL, 0444);
155MODULE_PARM_DESC(id, "ID string for dummy soundcard.");
156module_param_array(enable, bool, NULL, 0444);
157MODULE_PARM_DESC(enable, "Enable this dummy soundcard.");
158module_param_array(pcm_devs, int, NULL, 0444);
159MODULE_PARM_DESC(pcm_devs, "PCM devices # (0-4) for dummy driver.");
160module_param_array(pcm_substreams, int, NULL, 0444);
161MODULE_PARM_DESC(pcm_substreams, "PCM substreams # (1-16) for dummy driver.");
162//module_param_array(midi_devs, int, NULL, 0444);
163//MODULE_PARM_DESC(midi_devs, "MIDI devices # (0-2) for dummy driver.");
164
Clemens Ladischf7a92752005-12-07 09:13:42 +0100165static struct platform_device *devices[SNDRV_CARDS];
166
Linus Torvalds1da177e2005-04-16 15:20:36 -0700167#define MIXER_ADDR_MASTER 0
168#define MIXER_ADDR_LINE 1
169#define MIXER_ADDR_MIC 2
170#define MIXER_ADDR_SYNTH 3
171#define MIXER_ADDR_CD 4
172#define MIXER_ADDR_LAST 4
173
Takashi Iwai4a4d2cf2005-11-17 14:27:28 +0100174struct snd_dummy {
175 struct snd_card *card;
Takashi Iwai6e65c1c2005-11-17 16:01:56 +0100176 struct snd_pcm *pcm;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700177 spinlock_t mixer_lock;
178 int mixer_volume[MIXER_ADDR_LAST+1][2];
179 int capture_source[MIXER_ADDR_LAST+1][2];
Takashi Iwai4a4d2cf2005-11-17 14:27:28 +0100180};
Linus Torvalds1da177e2005-04-16 15:20:36 -0700181
Takashi Iwai4a4d2cf2005-11-17 14:27:28 +0100182struct snd_dummy_pcm {
183 struct snd_dummy *dummy;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700184 spinlock_t lock;
185 struct timer_list timer;
Ahmet Ä°nan53463a82008-02-21 07:55:30 +0100186 unsigned int pcm_buffer_size;
187 unsigned int pcm_period_size;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700188 unsigned int pcm_bps; /* bytes per second */
Ahmet Ä°nan53463a82008-02-21 07:55:30 +0100189 unsigned int pcm_hz; /* HZ */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700190 unsigned int pcm_irq_pos; /* IRQ position */
191 unsigned int pcm_buf_pos; /* position in buffer */
Takashi Iwai4a4d2cf2005-11-17 14:27:28 +0100192 struct snd_pcm_substream *substream;
193};
Linus Torvalds1da177e2005-04-16 15:20:36 -0700194
Linus Torvalds1da177e2005-04-16 15:20:36 -0700195
Takashi Iwai4a4d2cf2005-11-17 14:27:28 +0100196static inline void snd_card_dummy_pcm_timer_start(struct snd_dummy_pcm *dpcm)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700197{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700198 dpcm->timer.expires = 1 + jiffies;
199 add_timer(&dpcm->timer);
200}
201
Takashi Iwai4a4d2cf2005-11-17 14:27:28 +0100202static inline void snd_card_dummy_pcm_timer_stop(struct snd_dummy_pcm *dpcm)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700203{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700204 del_timer(&dpcm->timer);
205}
206
Takashi Iwai4a4d2cf2005-11-17 14:27:28 +0100207static int snd_card_dummy_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208{
Takashi Iwai4a4d2cf2005-11-17 14:27:28 +0100209 struct snd_pcm_runtime *runtime = substream->runtime;
210 struct snd_dummy_pcm *dpcm = runtime->private_data;
Takashi Iwaic8eb6ba2005-11-17 10:20:23 +0100211 int err = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700212
Takashi Iwaic8eb6ba2005-11-17 10:20:23 +0100213 spin_lock(&dpcm->lock);
Takashi Iwai6e65c1c2005-11-17 16:01:56 +0100214 switch (cmd) {
215 case SNDRV_PCM_TRIGGER_START:
216 case SNDRV_PCM_TRIGGER_RESUME:
Takashi Iwaic8eb6ba2005-11-17 10:20:23 +0100217 snd_card_dummy_pcm_timer_start(dpcm);
Takashi Iwai6e65c1c2005-11-17 16:01:56 +0100218 break;
219 case SNDRV_PCM_TRIGGER_STOP:
220 case SNDRV_PCM_TRIGGER_SUSPEND:
Takashi Iwaic8eb6ba2005-11-17 10:20:23 +0100221 snd_card_dummy_pcm_timer_stop(dpcm);
Takashi Iwai6e65c1c2005-11-17 16:01:56 +0100222 break;
223 default:
Takashi Iwaic8eb6ba2005-11-17 10:20:23 +0100224 err = -EINVAL;
Takashi Iwai6e65c1c2005-11-17 16:01:56 +0100225 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700226 }
Takashi Iwaic8eb6ba2005-11-17 10:20:23 +0100227 spin_unlock(&dpcm->lock);
Takashi Iwai6e65c1c2005-11-17 16:01:56 +0100228 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700229}
230
Takashi Iwai4a4d2cf2005-11-17 14:27:28 +0100231static int snd_card_dummy_pcm_prepare(struct snd_pcm_substream *substream)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700232{
Takashi Iwai4a4d2cf2005-11-17 14:27:28 +0100233 struct snd_pcm_runtime *runtime = substream->runtime;
234 struct snd_dummy_pcm *dpcm = runtime->private_data;
Roel Kluin369b2402008-04-16 19:30:30 +0200235 int bps;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700236
Roel Kluin369b2402008-04-16 19:30:30 +0200237 bps = snd_pcm_format_width(runtime->format) * runtime->rate *
238 runtime->channels / 8;
239
Linus Torvalds1da177e2005-04-16 15:20:36 -0700240 if (bps <= 0)
241 return -EINVAL;
Roel Kluin369b2402008-04-16 19:30:30 +0200242
Linus Torvalds1da177e2005-04-16 15:20:36 -0700243 dpcm->pcm_bps = bps;
Ahmet Ä°nan53463a82008-02-21 07:55:30 +0100244 dpcm->pcm_hz = HZ;
245 dpcm->pcm_buffer_size = snd_pcm_lib_buffer_bytes(substream);
246 dpcm->pcm_period_size = snd_pcm_lib_period_bytes(substream);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700247 dpcm->pcm_irq_pos = 0;
248 dpcm->pcm_buf_pos = 0;
Ahmet Ä°nan53463a82008-02-21 07:55:30 +0100249
250 snd_pcm_format_set_silence(runtime->format, runtime->dma_area,
251 bytes_to_samples(runtime, runtime->dma_bytes));
252
Linus Torvalds1da177e2005-04-16 15:20:36 -0700253 return 0;
254}
255
Linus Torvalds1da177e2005-04-16 15:20:36 -0700256static void snd_card_dummy_pcm_timer_function(unsigned long data)
257{
Takashi Iwai4a4d2cf2005-11-17 14:27:28 +0100258 struct snd_dummy_pcm *dpcm = (struct snd_dummy_pcm *)data;
Takashi Iwaib32425a2005-11-18 18:52:14 +0100259 unsigned long flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700260
Takashi Iwaib32425a2005-11-18 18:52:14 +0100261 spin_lock_irqsave(&dpcm->lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700262 dpcm->timer.expires = 1 + jiffies;
263 add_timer(&dpcm->timer);
Ahmet Ä°nan53463a82008-02-21 07:55:30 +0100264 dpcm->pcm_irq_pos += dpcm->pcm_bps;
Ahmet Ä°nan470f23b2008-02-28 12:46:32 +0100265 dpcm->pcm_buf_pos += dpcm->pcm_bps;
266 dpcm->pcm_buf_pos %= dpcm->pcm_buffer_size * dpcm->pcm_hz;
Ahmet Ä°nan53463a82008-02-21 07:55:30 +0100267 if (dpcm->pcm_irq_pos >= dpcm->pcm_period_size * dpcm->pcm_hz) {
268 dpcm->pcm_irq_pos %= dpcm->pcm_period_size * dpcm->pcm_hz;
Takashi Iwaib32425a2005-11-18 18:52:14 +0100269 spin_unlock_irqrestore(&dpcm->lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700270 snd_pcm_period_elapsed(dpcm->substream);
Takashi Iwaib32425a2005-11-18 18:52:14 +0100271 } else
272 spin_unlock_irqrestore(&dpcm->lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700273}
274
Takashi Iwai4a4d2cf2005-11-17 14:27:28 +0100275static snd_pcm_uframes_t snd_card_dummy_pcm_pointer(struct snd_pcm_substream *substream)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700276{
Takashi Iwai4a4d2cf2005-11-17 14:27:28 +0100277 struct snd_pcm_runtime *runtime = substream->runtime;
278 struct snd_dummy_pcm *dpcm = runtime->private_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700279
Ahmet Ä°nan470f23b2008-02-28 12:46:32 +0100280 return bytes_to_frames(runtime, dpcm->pcm_buf_pos / dpcm->pcm_hz);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700281}
282
Takashi Iwai4a4d2cf2005-11-17 14:27:28 +0100283static struct snd_pcm_hardware snd_card_dummy_playback =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700284{
285 .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
Takashi Iwai6e65c1c2005-11-17 16:01:56 +0100286 SNDRV_PCM_INFO_RESUME | SNDRV_PCM_INFO_MMAP_VALID),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700287 .formats = USE_FORMATS,
288 .rates = USE_RATE,
289 .rate_min = USE_RATE_MIN,
290 .rate_max = USE_RATE_MAX,
291 .channels_min = USE_CHANNELS_MIN,
292 .channels_max = USE_CHANNELS_MAX,
293 .buffer_bytes_max = MAX_BUFFER_SIZE,
294 .period_bytes_min = 64,
Takashi Iwaie05d6962006-08-17 17:12:19 +0200295 .period_bytes_max = MAX_PERIOD_SIZE,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700296 .periods_min = USE_PERIODS_MIN,
297 .periods_max = USE_PERIODS_MAX,
298 .fifo_size = 0,
299};
300
Takashi Iwai4a4d2cf2005-11-17 14:27:28 +0100301static struct snd_pcm_hardware snd_card_dummy_capture =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700302{
303 .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
Takashi Iwai6e65c1c2005-11-17 16:01:56 +0100304 SNDRV_PCM_INFO_RESUME | SNDRV_PCM_INFO_MMAP_VALID),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700305 .formats = USE_FORMATS,
306 .rates = USE_RATE,
307 .rate_min = USE_RATE_MIN,
308 .rate_max = USE_RATE_MAX,
309 .channels_min = USE_CHANNELS_MIN,
310 .channels_max = USE_CHANNELS_MAX,
311 .buffer_bytes_max = MAX_BUFFER_SIZE,
312 .period_bytes_min = 64,
Jaroslav Kysela2ad5dd82006-01-03 14:27:21 +0100313 .period_bytes_max = MAX_PERIOD_SIZE,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700314 .periods_min = USE_PERIODS_MIN,
315 .periods_max = USE_PERIODS_MAX,
316 .fifo_size = 0,
317};
318
Takashi Iwai4a4d2cf2005-11-17 14:27:28 +0100319static void snd_card_dummy_runtime_free(struct snd_pcm_runtime *runtime)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700320{
Takashi Iwaic8eb6ba2005-11-17 10:20:23 +0100321 kfree(runtime->private_data);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700322}
323
Takashi Iwai4a4d2cf2005-11-17 14:27:28 +0100324static int snd_card_dummy_hw_params(struct snd_pcm_substream *substream,
325 struct snd_pcm_hw_params *hw_params)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700326{
327 return snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params));
328}
329
Takashi Iwai4a4d2cf2005-11-17 14:27:28 +0100330static int snd_card_dummy_hw_free(struct snd_pcm_substream *substream)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700331{
332 return snd_pcm_lib_free_pages(substream);
333}
334
Takashi Iwai4a4d2cf2005-11-17 14:27:28 +0100335static struct snd_dummy_pcm *new_pcm_stream(struct snd_pcm_substream *substream)
Takashi Iwaic8eb6ba2005-11-17 10:20:23 +0100336{
Takashi Iwai4a4d2cf2005-11-17 14:27:28 +0100337 struct snd_dummy_pcm *dpcm;
Takashi Iwaic8eb6ba2005-11-17 10:20:23 +0100338
339 dpcm = kzalloc(sizeof(*dpcm), GFP_KERNEL);
340 if (! dpcm)
341 return dpcm;
342 init_timer(&dpcm->timer);
343 dpcm->timer.data = (unsigned long) dpcm;
344 dpcm->timer.function = snd_card_dummy_pcm_timer_function;
345 spin_lock_init(&dpcm->lock);
346 dpcm->substream = substream;
347 return dpcm;
348}
349
Takashi Iwai4a4d2cf2005-11-17 14:27:28 +0100350static int snd_card_dummy_playback_open(struct snd_pcm_substream *substream)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700351{
Takashi Iwai4a4d2cf2005-11-17 14:27:28 +0100352 struct snd_pcm_runtime *runtime = substream->runtime;
353 struct snd_dummy_pcm *dpcm;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700354 int err;
355
Takashi Iwaic8eb6ba2005-11-17 10:20:23 +0100356 if ((dpcm = new_pcm_stream(substream)) == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700357 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700358 runtime->private_data = dpcm;
Daniel THOMPSON54e8e212008-08-15 10:53:38 +0100359 /* makes the infrastructure responsible for freeing dpcm */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700360 runtime->private_free = snd_card_dummy_runtime_free;
361 runtime->hw = snd_card_dummy_playback;
362 if (substream->pcm->device & 1) {
363 runtime->hw.info &= ~SNDRV_PCM_INFO_INTERLEAVED;
364 runtime->hw.info |= SNDRV_PCM_INFO_NONINTERLEAVED;
365 }
366 if (substream->pcm->device & 2)
367 runtime->hw.info &= ~(SNDRV_PCM_INFO_MMAP|SNDRV_PCM_INFO_MMAP_VALID);
Jaroslav Kysela1a11cb62008-08-15 12:59:02 +0200368 err = add_playback_constraints(runtime);
369 if (err < 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700370 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700371
372 return 0;
373}
374
Takashi Iwai4a4d2cf2005-11-17 14:27:28 +0100375static int snd_card_dummy_capture_open(struct snd_pcm_substream *substream)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700376{
Takashi Iwai4a4d2cf2005-11-17 14:27:28 +0100377 struct snd_pcm_runtime *runtime = substream->runtime;
378 struct snd_dummy_pcm *dpcm;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700379 int err;
380
Takashi Iwaic8eb6ba2005-11-17 10:20:23 +0100381 if ((dpcm = new_pcm_stream(substream)) == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700382 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700383 runtime->private_data = dpcm;
Daniel THOMPSON54e8e212008-08-15 10:53:38 +0100384 /* makes the infrastructure responsible for freeing dpcm */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700385 runtime->private_free = snd_card_dummy_runtime_free;
386 runtime->hw = snd_card_dummy_capture;
387 if (substream->pcm->device == 1) {
388 runtime->hw.info &= ~SNDRV_PCM_INFO_INTERLEAVED;
389 runtime->hw.info |= SNDRV_PCM_INFO_NONINTERLEAVED;
390 }
391 if (substream->pcm->device & 2)
392 runtime->hw.info &= ~(SNDRV_PCM_INFO_MMAP|SNDRV_PCM_INFO_MMAP_VALID);
Jaroslav Kysela1a11cb62008-08-15 12:59:02 +0200393 err = add_capture_constraints(runtime);
394 if (err < 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700395 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700396
397 return 0;
398}
399
Takashi Iwai4a4d2cf2005-11-17 14:27:28 +0100400static int snd_card_dummy_playback_close(struct snd_pcm_substream *substream)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700401{
402 return 0;
403}
404
Takashi Iwai4a4d2cf2005-11-17 14:27:28 +0100405static int snd_card_dummy_capture_close(struct snd_pcm_substream *substream)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700406{
407 return 0;
408}
409
Takashi Iwai4a4d2cf2005-11-17 14:27:28 +0100410static struct snd_pcm_ops snd_card_dummy_playback_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700411 .open = snd_card_dummy_playback_open,
412 .close = snd_card_dummy_playback_close,
413 .ioctl = snd_pcm_lib_ioctl,
414 .hw_params = snd_card_dummy_hw_params,
415 .hw_free = snd_card_dummy_hw_free,
Takashi Iwaic8eb6ba2005-11-17 10:20:23 +0100416 .prepare = snd_card_dummy_pcm_prepare,
417 .trigger = snd_card_dummy_pcm_trigger,
418 .pointer = snd_card_dummy_pcm_pointer,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700419};
420
Takashi Iwai4a4d2cf2005-11-17 14:27:28 +0100421static struct snd_pcm_ops snd_card_dummy_capture_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700422 .open = snd_card_dummy_capture_open,
423 .close = snd_card_dummy_capture_close,
424 .ioctl = snd_pcm_lib_ioctl,
425 .hw_params = snd_card_dummy_hw_params,
426 .hw_free = snd_card_dummy_hw_free,
Takashi Iwaic8eb6ba2005-11-17 10:20:23 +0100427 .prepare = snd_card_dummy_pcm_prepare,
428 .trigger = snd_card_dummy_pcm_trigger,
429 .pointer = snd_card_dummy_pcm_pointer,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700430};
431
Prarit Bhargava788c6042007-02-13 13:11:11 +0100432static int __devinit snd_card_dummy_pcm(struct snd_dummy *dummy, int device,
433 int substreams)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700434{
Takashi Iwai4a4d2cf2005-11-17 14:27:28 +0100435 struct snd_pcm *pcm;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700436 int err;
437
Jaroslav Kysela1a11cb62008-08-15 12:59:02 +0200438 err = snd_pcm_new(dummy->card, "Dummy PCM", device,
439 substreams, substreams, &pcm);
440 if (err < 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700441 return err;
Takashi Iwai6e65c1c2005-11-17 16:01:56 +0100442 dummy->pcm = pcm;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700443 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_card_dummy_playback_ops);
444 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_card_dummy_capture_ops);
445 pcm->private_data = dummy;
446 pcm->info_flags = 0;
447 strcpy(pcm->name, "Dummy PCM");
448 snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_CONTINUOUS,
449 snd_dma_continuous_data(GFP_KERNEL),
450 0, 64*1024);
451 return 0;
452}
453
454#define DUMMY_VOLUME(xname, xindex, addr) \
Takashi Iwaifb567a82006-08-23 13:07:19 +0200455{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, \
456 .access = SNDRV_CTL_ELEM_ACCESS_READWRITE | SNDRV_CTL_ELEM_ACCESS_TLV_READ, \
457 .name = xname, .index = xindex, \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700458 .info = snd_dummy_volume_info, \
459 .get = snd_dummy_volume_get, .put = snd_dummy_volume_put, \
Takashi Iwaifb567a82006-08-23 13:07:19 +0200460 .private_value = addr, \
461 .tlv = { .p = db_scale_dummy } }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700462
Takashi Iwai4a4d2cf2005-11-17 14:27:28 +0100463static int snd_dummy_volume_info(struct snd_kcontrol *kcontrol,
464 struct snd_ctl_elem_info *uinfo)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700465{
466 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
467 uinfo->count = 2;
468 uinfo->value.integer.min = -50;
469 uinfo->value.integer.max = 100;
470 return 0;
471}
472
Takashi Iwai4a4d2cf2005-11-17 14:27:28 +0100473static int snd_dummy_volume_get(struct snd_kcontrol *kcontrol,
474 struct snd_ctl_elem_value *ucontrol)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700475{
Takashi Iwai4a4d2cf2005-11-17 14:27:28 +0100476 struct snd_dummy *dummy = snd_kcontrol_chip(kcontrol);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700477 int addr = kcontrol->private_value;
478
Takashi Iwaic8eb6ba2005-11-17 10:20:23 +0100479 spin_lock_irq(&dummy->mixer_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700480 ucontrol->value.integer.value[0] = dummy->mixer_volume[addr][0];
481 ucontrol->value.integer.value[1] = dummy->mixer_volume[addr][1];
Takashi Iwaic8eb6ba2005-11-17 10:20:23 +0100482 spin_unlock_irq(&dummy->mixer_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700483 return 0;
484}
485
Takashi Iwai4a4d2cf2005-11-17 14:27:28 +0100486static int snd_dummy_volume_put(struct snd_kcontrol *kcontrol,
487 struct snd_ctl_elem_value *ucontrol)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700488{
Takashi Iwai4a4d2cf2005-11-17 14:27:28 +0100489 struct snd_dummy *dummy = snd_kcontrol_chip(kcontrol);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700490 int change, addr = kcontrol->private_value;
491 int left, right;
492
493 left = ucontrol->value.integer.value[0];
494 if (left < -50)
495 left = -50;
496 if (left > 100)
497 left = 100;
498 right = ucontrol->value.integer.value[1];
499 if (right < -50)
500 right = -50;
501 if (right > 100)
502 right = 100;
Takashi Iwaic8eb6ba2005-11-17 10:20:23 +0100503 spin_lock_irq(&dummy->mixer_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700504 change = dummy->mixer_volume[addr][0] != left ||
505 dummy->mixer_volume[addr][1] != right;
506 dummy->mixer_volume[addr][0] = left;
507 dummy->mixer_volume[addr][1] = right;
Takashi Iwaic8eb6ba2005-11-17 10:20:23 +0100508 spin_unlock_irq(&dummy->mixer_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700509 return change;
510}
511
Takashi Iwai0cb29ea2007-01-29 15:33:49 +0100512static const DECLARE_TLV_DB_SCALE(db_scale_dummy, -4500, 30, 0);
Takashi Iwaifb567a82006-08-23 13:07:19 +0200513
Linus Torvalds1da177e2005-04-16 15:20:36 -0700514#define DUMMY_CAPSRC(xname, xindex, addr) \
515{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
516 .info = snd_dummy_capsrc_info, \
517 .get = snd_dummy_capsrc_get, .put = snd_dummy_capsrc_put, \
518 .private_value = addr }
519
Takashi Iwaia5ce8892007-07-23 15:42:26 +0200520#define snd_dummy_capsrc_info snd_ctl_boolean_stereo_info
Linus Torvalds1da177e2005-04-16 15:20:36 -0700521
Takashi Iwai4a4d2cf2005-11-17 14:27:28 +0100522static int snd_dummy_capsrc_get(struct snd_kcontrol *kcontrol,
523 struct snd_ctl_elem_value *ucontrol)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700524{
Takashi Iwai4a4d2cf2005-11-17 14:27:28 +0100525 struct snd_dummy *dummy = snd_kcontrol_chip(kcontrol);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700526 int addr = kcontrol->private_value;
527
Takashi Iwaic8eb6ba2005-11-17 10:20:23 +0100528 spin_lock_irq(&dummy->mixer_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700529 ucontrol->value.integer.value[0] = dummy->capture_source[addr][0];
530 ucontrol->value.integer.value[1] = dummy->capture_source[addr][1];
Takashi Iwaic8eb6ba2005-11-17 10:20:23 +0100531 spin_unlock_irq(&dummy->mixer_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700532 return 0;
533}
534
Takashi Iwai4a4d2cf2005-11-17 14:27:28 +0100535static int snd_dummy_capsrc_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700536{
Takashi Iwai4a4d2cf2005-11-17 14:27:28 +0100537 struct snd_dummy *dummy = snd_kcontrol_chip(kcontrol);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700538 int change, addr = kcontrol->private_value;
539 int left, right;
540
541 left = ucontrol->value.integer.value[0] & 1;
542 right = ucontrol->value.integer.value[1] & 1;
Takashi Iwaic8eb6ba2005-11-17 10:20:23 +0100543 spin_lock_irq(&dummy->mixer_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700544 change = dummy->capture_source[addr][0] != left &&
545 dummy->capture_source[addr][1] != right;
546 dummy->capture_source[addr][0] = left;
547 dummy->capture_source[addr][1] = right;
Takashi Iwaic8eb6ba2005-11-17 10:20:23 +0100548 spin_unlock_irq(&dummy->mixer_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700549 return change;
550}
551
Takashi Iwai4a4d2cf2005-11-17 14:27:28 +0100552static struct snd_kcontrol_new snd_dummy_controls[] = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700553DUMMY_VOLUME("Master Volume", 0, MIXER_ADDR_MASTER),
554DUMMY_CAPSRC("Master Capture Switch", 0, MIXER_ADDR_MASTER),
555DUMMY_VOLUME("Synth Volume", 0, MIXER_ADDR_SYNTH),
Takashi Iwaie05d6962006-08-17 17:12:19 +0200556DUMMY_CAPSRC("Synth Capture Switch", 0, MIXER_ADDR_SYNTH),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700557DUMMY_VOLUME("Line Volume", 0, MIXER_ADDR_LINE),
Takashi Iwaie05d6962006-08-17 17:12:19 +0200558DUMMY_CAPSRC("Line Capture Switch", 0, MIXER_ADDR_LINE),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700559DUMMY_VOLUME("Mic Volume", 0, MIXER_ADDR_MIC),
Takashi Iwaie05d6962006-08-17 17:12:19 +0200560DUMMY_CAPSRC("Mic Capture Switch", 0, MIXER_ADDR_MIC),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700561DUMMY_VOLUME("CD Volume", 0, MIXER_ADDR_CD),
Takashi Iwaie05d6962006-08-17 17:12:19 +0200562DUMMY_CAPSRC("CD Capture Switch", 0, MIXER_ADDR_CD)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700563};
564
Prarit Bhargava788c6042007-02-13 13:11:11 +0100565static int __devinit snd_card_dummy_new_mixer(struct snd_dummy *dummy)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700566{
Takashi Iwai4a4d2cf2005-11-17 14:27:28 +0100567 struct snd_card *card = dummy->card;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700568 unsigned int idx;
569 int err;
570
Takashi Iwai5e246b82008-08-08 17:12:47 +0200571 if (snd_BUG_ON(!dummy))
572 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700573 spin_lock_init(&dummy->mixer_lock);
574 strcpy(card->mixername, "Dummy Mixer");
575
576 for (idx = 0; idx < ARRAY_SIZE(snd_dummy_controls); idx++) {
Jaroslav Kysela1a11cb62008-08-15 12:59:02 +0200577 err = snd_ctl_add(card, snd_ctl_new1(&snd_dummy_controls[idx], dummy));
578 if (err < 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700579 return err;
580 }
581 return 0;
582}
583
Prarit Bhargava788c6042007-02-13 13:11:11 +0100584static int __devinit snd_dummy_probe(struct platform_device *devptr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700585{
Takashi Iwai4a4d2cf2005-11-17 14:27:28 +0100586 struct snd_card *card;
587 struct snd_dummy *dummy;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700588 int idx, err;
Takashi Iwai6e65c1c2005-11-17 16:01:56 +0100589 int dev = devptr->id;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700590
Takashi Iwaibd7dd772008-12-28 16:45:02 +0100591 err = snd_card_create(index[dev], id[dev], THIS_MODULE,
592 sizeof(struct snd_dummy), &card);
593 if (err < 0)
594 return err;
Takashi Iwai4a4d2cf2005-11-17 14:27:28 +0100595 dummy = card->private_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700596 dummy->card = card;
597 for (idx = 0; idx < MAX_PCM_DEVICES && idx < pcm_devs[dev]; idx++) {
598 if (pcm_substreams[dev] < 1)
599 pcm_substreams[dev] = 1;
600 if (pcm_substreams[dev] > MAX_PCM_SUBSTREAMS)
601 pcm_substreams[dev] = MAX_PCM_SUBSTREAMS;
Jaroslav Kysela1a11cb62008-08-15 12:59:02 +0200602 err = snd_card_dummy_pcm(dummy, idx, pcm_substreams[dev]);
603 if (err < 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700604 goto __nodev;
605 }
Jaroslav Kysela1a11cb62008-08-15 12:59:02 +0200606 err = snd_card_dummy_new_mixer(dummy);
607 if (err < 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700608 goto __nodev;
609 strcpy(card->driver, "Dummy");
610 strcpy(card->shortname, "Dummy");
611 sprintf(card->longname, "Dummy %i", dev + 1);
Takashi Iwai16dab542005-09-05 17:17:58 +0200612
Takashi Iwai6e65c1c2005-11-17 16:01:56 +0100613 snd_card_set_dev(card, &devptr->dev);
Takashi Iwai16dab542005-09-05 17:17:58 +0200614
Jaroslav Kysela1a11cb62008-08-15 12:59:02 +0200615 err = snd_card_register(card);
616 if (err == 0) {
Takashi Iwai6e65c1c2005-11-17 16:01:56 +0100617 platform_set_drvdata(devptr, card);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700618 return 0;
619 }
620 __nodev:
621 snd_card_free(card);
622 return err;
623}
624
Prarit Bhargava788c6042007-02-13 13:11:11 +0100625static int __devexit snd_dummy_remove(struct platform_device *devptr)
Takashi Iwai6e65c1c2005-11-17 16:01:56 +0100626{
627 snd_card_free(platform_get_drvdata(devptr));
628 platform_set_drvdata(devptr, NULL);
629 return 0;
630}
631
632#ifdef CONFIG_PM
633static int snd_dummy_suspend(struct platform_device *pdev, pm_message_t state)
634{
635 struct snd_card *card = platform_get_drvdata(pdev);
636 struct snd_dummy *dummy = card->private_data;
637
638 snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
639 snd_pcm_suspend_all(dummy->pcm);
640 return 0;
641}
642
643static int snd_dummy_resume(struct platform_device *pdev)
644{
645 struct snd_card *card = platform_get_drvdata(pdev);
646
647 snd_power_change_state(card, SNDRV_CTL_POWER_D0);
648 return 0;
649}
650#endif
651
652#define SND_DUMMY_DRIVER "snd_dummy"
653
654static struct platform_driver snd_dummy_driver = {
655 .probe = snd_dummy_probe,
Prarit Bhargava788c6042007-02-13 13:11:11 +0100656 .remove = __devexit_p(snd_dummy_remove),
Takashi Iwai6e65c1c2005-11-17 16:01:56 +0100657#ifdef CONFIG_PM
658 .suspend = snd_dummy_suspend,
659 .resume = snd_dummy_resume,
660#endif
661 .driver = {
662 .name = SND_DUMMY_DRIVER
663 },
664};
665
Randy Dunlapc12aad62007-06-25 12:08:01 +0200666static void snd_dummy_unregister_all(void)
Clemens Ladischf7a92752005-12-07 09:13:42 +0100667{
668 int i;
669
670 for (i = 0; i < ARRAY_SIZE(devices); ++i)
671 platform_device_unregister(devices[i]);
672 platform_driver_unregister(&snd_dummy_driver);
673}
674
Linus Torvalds1da177e2005-04-16 15:20:36 -0700675static int __init alsa_card_dummy_init(void)
676{
Takashi Iwai6e65c1c2005-11-17 16:01:56 +0100677 int i, cards, err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700678
Jaroslav Kysela1a11cb62008-08-15 12:59:02 +0200679 err = platform_driver_register(&snd_dummy_driver);
680 if (err < 0)
Takashi Iwai6e65c1c2005-11-17 16:01:56 +0100681 return err;
682
683 cards = 0;
Takashi Iwai8278ca82006-02-20 11:57:34 +0100684 for (i = 0; i < SNDRV_CARDS; i++) {
Takashi Iwai6e65c1c2005-11-17 16:01:56 +0100685 struct platform_device *device;
Takashi Iwai8278ca82006-02-20 11:57:34 +0100686 if (! enable[i])
687 continue;
Takashi Iwai6e65c1c2005-11-17 16:01:56 +0100688 device = platform_device_register_simple(SND_DUMMY_DRIVER,
689 i, NULL, 0);
Rene Hermana182ee92006-04-13 12:57:11 +0200690 if (IS_ERR(device))
691 continue;
Rene Herman71524472006-04-13 12:58:06 +0200692 if (!platform_get_drvdata(device)) {
693 platform_device_unregister(device);
694 continue;
695 }
Clemens Ladischf7a92752005-12-07 09:13:42 +0100696 devices[i] = device;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700697 cards++;
698 }
699 if (!cards) {
700#ifdef MODULE
701 printk(KERN_ERR "Dummy soundcard not found or device busy\n");
702#endif
Rene Hermana182ee92006-04-13 12:57:11 +0200703 snd_dummy_unregister_all();
704 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700705 }
706 return 0;
707}
708
709static void __exit alsa_card_dummy_exit(void)
710{
Clemens Ladischf7a92752005-12-07 09:13:42 +0100711 snd_dummy_unregister_all();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700712}
713
714module_init(alsa_card_dummy_init)
715module_exit(alsa_card_dummy_exit)