![Rene Herman](/assets/img/avatar_default.png)
I previously only concerned myself with sound/isa. When I now checked for more platform_device_register_simple() usages in ALSA I found a couple more drivers that needed the same patches as already submitted for all the ISA drivers. This first one is the continue-on-iserr patch for sound/drivers. This gets them all. Signed-off-by: Rene Herman <rene.herman@keyaccess.nl> Signed-off-by: Takashi Iwai <tiwai@suse.de>
700 lines
20 KiB
C
700 lines
20 KiB
C
/*
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* Dummy soundcard
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* Copyright (c) by Jaroslav Kysela <perex@suse.cz>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include <sound/driver.h>
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#include <linux/init.h>
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#include <linux/err.h>
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#include <linux/platform_device.h>
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#include <linux/jiffies.h>
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#include <linux/slab.h>
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#include <linux/time.h>
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#include <linux/wait.h>
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#include <linux/moduleparam.h>
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#include <sound/core.h>
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#include <sound/control.h>
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#include <sound/pcm.h>
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#include <sound/rawmidi.h>
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#include <sound/initval.h>
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MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>");
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MODULE_DESCRIPTION("Dummy soundcard (/dev/null)");
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MODULE_LICENSE("GPL");
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MODULE_SUPPORTED_DEVICE("{{ALSA,Dummy soundcard}}");
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#define MAX_PCM_DEVICES 4
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#define MAX_PCM_SUBSTREAMS 16
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#define MAX_MIDI_DEVICES 2
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#if 0 /* emu10k1 emulation */
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#define MAX_BUFFER_SIZE (128 * 1024)
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static int emu10k1_playback_constraints(struct snd_pcm_runtime *runtime)
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{
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int err;
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if ((err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
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return err;
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if ((err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 256, UINT_MAX)) < 0)
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return err;
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return 0;
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}
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#define add_playback_constraints emu10k1_playback_constraints
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#endif
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#if 0 /* RME9652 emulation */
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#define MAX_BUFFER_SIZE (26 * 64 * 1024)
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#define USE_FORMATS SNDRV_PCM_FMTBIT_S32_LE
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#define USE_CHANNELS_MIN 26
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#define USE_CHANNELS_MAX 26
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#define USE_PERIODS_MIN 2
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#define USE_PERIODS_MAX 2
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#endif
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#if 0 /* ICE1712 emulation */
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#define MAX_BUFFER_SIZE (256 * 1024)
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#define USE_FORMATS SNDRV_PCM_FMTBIT_S32_LE
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#define USE_CHANNELS_MIN 10
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#define USE_CHANNELS_MAX 10
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#define USE_PERIODS_MIN 1
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#define USE_PERIODS_MAX 1024
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#endif
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#if 0 /* UDA1341 emulation */
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#define MAX_BUFFER_SIZE (16380)
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#define USE_FORMATS SNDRV_PCM_FMTBIT_S16_LE
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#define USE_CHANNELS_MIN 2
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#define USE_CHANNELS_MAX 2
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#define USE_PERIODS_MIN 2
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#define USE_PERIODS_MAX 255
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#endif
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#if 0 /* simple AC97 bridge (intel8x0) with 48kHz AC97 only codec */
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#define USE_FORMATS SNDRV_PCM_FMTBIT_S16_LE
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#define USE_CHANNELS_MIN 2
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#define USE_CHANNELS_MAX 2
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#define USE_RATE SNDRV_PCM_RATE_48000
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#define USE_RATE_MIN 48000
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#define USE_RATE_MAX 48000
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#endif
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#if 0 /* CA0106 */
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#define USE_FORMATS SNDRV_PCM_FMTBIT_S16_LE
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#define USE_CHANNELS_MIN 2
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#define USE_CHANNELS_MAX 2
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#define USE_RATE (SNDRV_PCM_RATE_48000|SNDRV_PCM_RATE_96000|SNDRV_PCM_RATE_192000)
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#define USE_RATE_MIN 48000
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#define USE_RATE_MAX 192000
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#define MAX_BUFFER_SIZE ((65536-64)*8)
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#define MAX_PERIOD_SIZE (65536-64)
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#define USE_PERIODS_MIN 2
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#define USE_PERIODS_MAX 8
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#endif
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/* defaults */
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#ifndef MAX_BUFFER_SIZE
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#define MAX_BUFFER_SIZE (64*1024)
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#endif
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#ifndef MAX_PERIOD_SIZE
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#define MAX_PERIOD_SIZE MAX_BUFFER_SIZE
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#endif
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#ifndef USE_FORMATS
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#define USE_FORMATS (SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE)
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#endif
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#ifndef USE_RATE
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#define USE_RATE SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_48000
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#define USE_RATE_MIN 5500
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#define USE_RATE_MAX 48000
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#endif
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#ifndef USE_CHANNELS_MIN
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#define USE_CHANNELS_MIN 1
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#endif
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#ifndef USE_CHANNELS_MAX
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#define USE_CHANNELS_MAX 2
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#endif
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#ifndef USE_PERIODS_MIN
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#define USE_PERIODS_MIN 1
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#endif
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#ifndef USE_PERIODS_MAX
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#define USE_PERIODS_MAX 1024
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#endif
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#ifndef add_playback_constraints
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#define add_playback_constraints(x) 0
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#endif
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#ifndef add_capture_constraints
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#define add_capture_constraints(x) 0
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#endif
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static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-MAX */
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static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* ID for this card */
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static int enable[SNDRV_CARDS] = {1, [1 ... (SNDRV_CARDS - 1)] = 0};
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static int pcm_devs[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 1};
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static int pcm_substreams[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 8};
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//static int midi_devs[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 2};
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module_param_array(index, int, NULL, 0444);
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MODULE_PARM_DESC(index, "Index value for dummy soundcard.");
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module_param_array(id, charp, NULL, 0444);
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MODULE_PARM_DESC(id, "ID string for dummy soundcard.");
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module_param_array(enable, bool, NULL, 0444);
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MODULE_PARM_DESC(enable, "Enable this dummy soundcard.");
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module_param_array(pcm_devs, int, NULL, 0444);
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MODULE_PARM_DESC(pcm_devs, "PCM devices # (0-4) for dummy driver.");
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module_param_array(pcm_substreams, int, NULL, 0444);
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MODULE_PARM_DESC(pcm_substreams, "PCM substreams # (1-16) for dummy driver.");
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//module_param_array(midi_devs, int, NULL, 0444);
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//MODULE_PARM_DESC(midi_devs, "MIDI devices # (0-2) for dummy driver.");
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static struct platform_device *devices[SNDRV_CARDS];
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#define MIXER_ADDR_MASTER 0
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#define MIXER_ADDR_LINE 1
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#define MIXER_ADDR_MIC 2
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#define MIXER_ADDR_SYNTH 3
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#define MIXER_ADDR_CD 4
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#define MIXER_ADDR_LAST 4
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struct snd_dummy {
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struct snd_card *card;
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struct snd_pcm *pcm;
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spinlock_t mixer_lock;
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int mixer_volume[MIXER_ADDR_LAST+1][2];
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int capture_source[MIXER_ADDR_LAST+1][2];
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};
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struct snd_dummy_pcm {
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struct snd_dummy *dummy;
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spinlock_t lock;
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struct timer_list timer;
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unsigned int pcm_size;
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unsigned int pcm_count;
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unsigned int pcm_bps; /* bytes per second */
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unsigned int pcm_jiffie; /* bytes per one jiffie */
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unsigned int pcm_irq_pos; /* IRQ position */
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unsigned int pcm_buf_pos; /* position in buffer */
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struct snd_pcm_substream *substream;
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};
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static inline void snd_card_dummy_pcm_timer_start(struct snd_dummy_pcm *dpcm)
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{
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dpcm->timer.expires = 1 + jiffies;
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add_timer(&dpcm->timer);
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}
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static inline void snd_card_dummy_pcm_timer_stop(struct snd_dummy_pcm *dpcm)
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{
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del_timer(&dpcm->timer);
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}
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static int snd_card_dummy_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
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{
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struct snd_pcm_runtime *runtime = substream->runtime;
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struct snd_dummy_pcm *dpcm = runtime->private_data;
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int err = 0;
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spin_lock(&dpcm->lock);
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switch (cmd) {
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case SNDRV_PCM_TRIGGER_START:
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case SNDRV_PCM_TRIGGER_RESUME:
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snd_card_dummy_pcm_timer_start(dpcm);
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break;
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case SNDRV_PCM_TRIGGER_STOP:
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case SNDRV_PCM_TRIGGER_SUSPEND:
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snd_card_dummy_pcm_timer_stop(dpcm);
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break;
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default:
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err = -EINVAL;
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break;
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}
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spin_unlock(&dpcm->lock);
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return 0;
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}
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static int snd_card_dummy_pcm_prepare(struct snd_pcm_substream *substream)
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{
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struct snd_pcm_runtime *runtime = substream->runtime;
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struct snd_dummy_pcm *dpcm = runtime->private_data;
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unsigned int bps;
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bps = runtime->rate * runtime->channels;
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bps *= snd_pcm_format_width(runtime->format);
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bps /= 8;
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if (bps <= 0)
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return -EINVAL;
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dpcm->pcm_bps = bps;
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dpcm->pcm_jiffie = bps / HZ;
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dpcm->pcm_size = snd_pcm_lib_buffer_bytes(substream);
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dpcm->pcm_count = snd_pcm_lib_period_bytes(substream);
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dpcm->pcm_irq_pos = 0;
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dpcm->pcm_buf_pos = 0;
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return 0;
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}
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static void snd_card_dummy_pcm_timer_function(unsigned long data)
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{
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struct snd_dummy_pcm *dpcm = (struct snd_dummy_pcm *)data;
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unsigned long flags;
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spin_lock_irqsave(&dpcm->lock, flags);
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dpcm->timer.expires = 1 + jiffies;
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add_timer(&dpcm->timer);
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dpcm->pcm_irq_pos += dpcm->pcm_jiffie;
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dpcm->pcm_buf_pos += dpcm->pcm_jiffie;
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dpcm->pcm_buf_pos %= dpcm->pcm_size;
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if (dpcm->pcm_irq_pos >= dpcm->pcm_count) {
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dpcm->pcm_irq_pos %= dpcm->pcm_count;
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spin_unlock_irqrestore(&dpcm->lock, flags);
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snd_pcm_period_elapsed(dpcm->substream);
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} else
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spin_unlock_irqrestore(&dpcm->lock, flags);
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}
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static snd_pcm_uframes_t snd_card_dummy_pcm_pointer(struct snd_pcm_substream *substream)
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{
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struct snd_pcm_runtime *runtime = substream->runtime;
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struct snd_dummy_pcm *dpcm = runtime->private_data;
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return bytes_to_frames(runtime, dpcm->pcm_buf_pos);
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}
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static struct snd_pcm_hardware snd_card_dummy_playback =
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{
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.info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
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SNDRV_PCM_INFO_RESUME | SNDRV_PCM_INFO_MMAP_VALID),
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.formats = USE_FORMATS,
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.rates = USE_RATE,
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.rate_min = USE_RATE_MIN,
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.rate_max = USE_RATE_MAX,
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.channels_min = USE_CHANNELS_MIN,
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.channels_max = USE_CHANNELS_MAX,
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.buffer_bytes_max = MAX_BUFFER_SIZE,
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.period_bytes_min = 64,
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.period_bytes_max = MAX_BUFFER_SIZE,
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.periods_min = USE_PERIODS_MIN,
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.periods_max = USE_PERIODS_MAX,
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.fifo_size = 0,
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};
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static struct snd_pcm_hardware snd_card_dummy_capture =
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{
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.info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
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SNDRV_PCM_INFO_RESUME | SNDRV_PCM_INFO_MMAP_VALID),
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.formats = USE_FORMATS,
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.rates = USE_RATE,
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.rate_min = USE_RATE_MIN,
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.rate_max = USE_RATE_MAX,
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.channels_min = USE_CHANNELS_MIN,
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.channels_max = USE_CHANNELS_MAX,
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.buffer_bytes_max = MAX_BUFFER_SIZE,
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.period_bytes_min = 64,
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.period_bytes_max = MAX_PERIOD_SIZE,
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.periods_min = USE_PERIODS_MIN,
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.periods_max = USE_PERIODS_MAX,
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.fifo_size = 0,
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};
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static void snd_card_dummy_runtime_free(struct snd_pcm_runtime *runtime)
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{
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kfree(runtime->private_data);
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}
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static int snd_card_dummy_hw_params(struct snd_pcm_substream *substream,
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struct snd_pcm_hw_params *hw_params)
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{
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return snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params));
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}
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static int snd_card_dummy_hw_free(struct snd_pcm_substream *substream)
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{
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return snd_pcm_lib_free_pages(substream);
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}
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static struct snd_dummy_pcm *new_pcm_stream(struct snd_pcm_substream *substream)
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{
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struct snd_dummy_pcm *dpcm;
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dpcm = kzalloc(sizeof(*dpcm), GFP_KERNEL);
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if (! dpcm)
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return dpcm;
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init_timer(&dpcm->timer);
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dpcm->timer.data = (unsigned long) dpcm;
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dpcm->timer.function = snd_card_dummy_pcm_timer_function;
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spin_lock_init(&dpcm->lock);
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dpcm->substream = substream;
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return dpcm;
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}
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static int snd_card_dummy_playback_open(struct snd_pcm_substream *substream)
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{
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struct snd_pcm_runtime *runtime = substream->runtime;
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struct snd_dummy_pcm *dpcm;
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int err;
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if ((dpcm = new_pcm_stream(substream)) == NULL)
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return -ENOMEM;
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runtime->private_data = dpcm;
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runtime->private_free = snd_card_dummy_runtime_free;
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runtime->hw = snd_card_dummy_playback;
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if (substream->pcm->device & 1) {
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runtime->hw.info &= ~SNDRV_PCM_INFO_INTERLEAVED;
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runtime->hw.info |= SNDRV_PCM_INFO_NONINTERLEAVED;
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}
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if (substream->pcm->device & 2)
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runtime->hw.info &= ~(SNDRV_PCM_INFO_MMAP|SNDRV_PCM_INFO_MMAP_VALID);
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if ((err = add_playback_constraints(runtime)) < 0) {
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kfree(dpcm);
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return err;
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}
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return 0;
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}
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static int snd_card_dummy_capture_open(struct snd_pcm_substream *substream)
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{
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struct snd_pcm_runtime *runtime = substream->runtime;
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struct snd_dummy_pcm *dpcm;
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int err;
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if ((dpcm = new_pcm_stream(substream)) == NULL)
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return -ENOMEM;
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runtime->private_data = dpcm;
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runtime->private_free = snd_card_dummy_runtime_free;
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runtime->hw = snd_card_dummy_capture;
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if (substream->pcm->device == 1) {
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runtime->hw.info &= ~SNDRV_PCM_INFO_INTERLEAVED;
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runtime->hw.info |= SNDRV_PCM_INFO_NONINTERLEAVED;
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}
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if (substream->pcm->device & 2)
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runtime->hw.info &= ~(SNDRV_PCM_INFO_MMAP|SNDRV_PCM_INFO_MMAP_VALID);
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if ((err = add_capture_constraints(runtime)) < 0) {
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kfree(dpcm);
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return err;
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}
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return 0;
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}
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static int snd_card_dummy_playback_close(struct snd_pcm_substream *substream)
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{
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return 0;
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}
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static int snd_card_dummy_capture_close(struct snd_pcm_substream *substream)
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{
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return 0;
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}
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static struct snd_pcm_ops snd_card_dummy_playback_ops = {
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.open = snd_card_dummy_playback_open,
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.close = snd_card_dummy_playback_close,
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.ioctl = snd_pcm_lib_ioctl,
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.hw_params = snd_card_dummy_hw_params,
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.hw_free = snd_card_dummy_hw_free,
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.prepare = snd_card_dummy_pcm_prepare,
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.trigger = snd_card_dummy_pcm_trigger,
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.pointer = snd_card_dummy_pcm_pointer,
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};
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static struct snd_pcm_ops snd_card_dummy_capture_ops = {
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.open = snd_card_dummy_capture_open,
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.close = snd_card_dummy_capture_close,
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.ioctl = snd_pcm_lib_ioctl,
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.hw_params = snd_card_dummy_hw_params,
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.hw_free = snd_card_dummy_hw_free,
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.prepare = snd_card_dummy_pcm_prepare,
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.trigger = snd_card_dummy_pcm_trigger,
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.pointer = snd_card_dummy_pcm_pointer,
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};
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static int __init snd_card_dummy_pcm(struct snd_dummy *dummy, int device, int substreams)
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{
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struct snd_pcm *pcm;
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int err;
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if ((err = snd_pcm_new(dummy->card, "Dummy PCM", device,
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substreams, substreams, &pcm)) < 0)
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return err;
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dummy->pcm = pcm;
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snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_card_dummy_playback_ops);
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snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_card_dummy_capture_ops);
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pcm->private_data = dummy;
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pcm->info_flags = 0;
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strcpy(pcm->name, "Dummy PCM");
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snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_CONTINUOUS,
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snd_dma_continuous_data(GFP_KERNEL),
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0, 64*1024);
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return 0;
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}
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#define DUMMY_VOLUME(xname, xindex, addr) \
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{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
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.info = snd_dummy_volume_info, \
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.get = snd_dummy_volume_get, .put = snd_dummy_volume_put, \
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.private_value = addr }
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static int snd_dummy_volume_info(struct snd_kcontrol *kcontrol,
|
|
struct snd_ctl_elem_info *uinfo)
|
|
{
|
|
uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
|
|
uinfo->count = 2;
|
|
uinfo->value.integer.min = -50;
|
|
uinfo->value.integer.max = 100;
|
|
return 0;
|
|
}
|
|
|
|
static int snd_dummy_volume_get(struct snd_kcontrol *kcontrol,
|
|
struct snd_ctl_elem_value *ucontrol)
|
|
{
|
|
struct snd_dummy *dummy = snd_kcontrol_chip(kcontrol);
|
|
int addr = kcontrol->private_value;
|
|
|
|
spin_lock_irq(&dummy->mixer_lock);
|
|
ucontrol->value.integer.value[0] = dummy->mixer_volume[addr][0];
|
|
ucontrol->value.integer.value[1] = dummy->mixer_volume[addr][1];
|
|
spin_unlock_irq(&dummy->mixer_lock);
|
|
return 0;
|
|
}
|
|
|
|
static int snd_dummy_volume_put(struct snd_kcontrol *kcontrol,
|
|
struct snd_ctl_elem_value *ucontrol)
|
|
{
|
|
struct snd_dummy *dummy = snd_kcontrol_chip(kcontrol);
|
|
int change, addr = kcontrol->private_value;
|
|
int left, right;
|
|
|
|
left = ucontrol->value.integer.value[0];
|
|
if (left < -50)
|
|
left = -50;
|
|
if (left > 100)
|
|
left = 100;
|
|
right = ucontrol->value.integer.value[1];
|
|
if (right < -50)
|
|
right = -50;
|
|
if (right > 100)
|
|
right = 100;
|
|
spin_lock_irq(&dummy->mixer_lock);
|
|
change = dummy->mixer_volume[addr][0] != left ||
|
|
dummy->mixer_volume[addr][1] != right;
|
|
dummy->mixer_volume[addr][0] = left;
|
|
dummy->mixer_volume[addr][1] = right;
|
|
spin_unlock_irq(&dummy->mixer_lock);
|
|
return change;
|
|
}
|
|
|
|
#define DUMMY_CAPSRC(xname, xindex, addr) \
|
|
{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
|
|
.info = snd_dummy_capsrc_info, \
|
|
.get = snd_dummy_capsrc_get, .put = snd_dummy_capsrc_put, \
|
|
.private_value = addr }
|
|
|
|
static int snd_dummy_capsrc_info(struct snd_kcontrol *kcontrol,
|
|
struct snd_ctl_elem_info *uinfo)
|
|
{
|
|
uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
|
|
uinfo->count = 2;
|
|
uinfo->value.integer.min = 0;
|
|
uinfo->value.integer.max = 1;
|
|
return 0;
|
|
}
|
|
|
|
static int snd_dummy_capsrc_get(struct snd_kcontrol *kcontrol,
|
|
struct snd_ctl_elem_value *ucontrol)
|
|
{
|
|
struct snd_dummy *dummy = snd_kcontrol_chip(kcontrol);
|
|
int addr = kcontrol->private_value;
|
|
|
|
spin_lock_irq(&dummy->mixer_lock);
|
|
ucontrol->value.integer.value[0] = dummy->capture_source[addr][0];
|
|
ucontrol->value.integer.value[1] = dummy->capture_source[addr][1];
|
|
spin_unlock_irq(&dummy->mixer_lock);
|
|
return 0;
|
|
}
|
|
|
|
static int snd_dummy_capsrc_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
|
|
{
|
|
struct snd_dummy *dummy = snd_kcontrol_chip(kcontrol);
|
|
int change, addr = kcontrol->private_value;
|
|
int left, right;
|
|
|
|
left = ucontrol->value.integer.value[0] & 1;
|
|
right = ucontrol->value.integer.value[1] & 1;
|
|
spin_lock_irq(&dummy->mixer_lock);
|
|
change = dummy->capture_source[addr][0] != left &&
|
|
dummy->capture_source[addr][1] != right;
|
|
dummy->capture_source[addr][0] = left;
|
|
dummy->capture_source[addr][1] = right;
|
|
spin_unlock_irq(&dummy->mixer_lock);
|
|
return change;
|
|
}
|
|
|
|
static struct snd_kcontrol_new snd_dummy_controls[] = {
|
|
DUMMY_VOLUME("Master Volume", 0, MIXER_ADDR_MASTER),
|
|
DUMMY_CAPSRC("Master Capture Switch", 0, MIXER_ADDR_MASTER),
|
|
DUMMY_VOLUME("Synth Volume", 0, MIXER_ADDR_SYNTH),
|
|
DUMMY_CAPSRC("Synth Capture Switch", 0, MIXER_ADDR_MASTER),
|
|
DUMMY_VOLUME("Line Volume", 0, MIXER_ADDR_LINE),
|
|
DUMMY_CAPSRC("Line Capture Switch", 0, MIXER_ADDR_MASTER),
|
|
DUMMY_VOLUME("Mic Volume", 0, MIXER_ADDR_MIC),
|
|
DUMMY_CAPSRC("Mic Capture Switch", 0, MIXER_ADDR_MASTER),
|
|
DUMMY_VOLUME("CD Volume", 0, MIXER_ADDR_CD),
|
|
DUMMY_CAPSRC("CD Capture Switch", 0, MIXER_ADDR_MASTER)
|
|
};
|
|
|
|
static int __init snd_card_dummy_new_mixer(struct snd_dummy *dummy)
|
|
{
|
|
struct snd_card *card = dummy->card;
|
|
unsigned int idx;
|
|
int err;
|
|
|
|
snd_assert(dummy != NULL, return -EINVAL);
|
|
spin_lock_init(&dummy->mixer_lock);
|
|
strcpy(card->mixername, "Dummy Mixer");
|
|
|
|
for (idx = 0; idx < ARRAY_SIZE(snd_dummy_controls); idx++) {
|
|
if ((err = snd_ctl_add(card, snd_ctl_new1(&snd_dummy_controls[idx], dummy))) < 0)
|
|
return err;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int __init snd_dummy_probe(struct platform_device *devptr)
|
|
{
|
|
struct snd_card *card;
|
|
struct snd_dummy *dummy;
|
|
int idx, err;
|
|
int dev = devptr->id;
|
|
|
|
card = snd_card_new(index[dev], id[dev], THIS_MODULE,
|
|
sizeof(struct snd_dummy));
|
|
if (card == NULL)
|
|
return -ENOMEM;
|
|
dummy = card->private_data;
|
|
dummy->card = card;
|
|
for (idx = 0; idx < MAX_PCM_DEVICES && idx < pcm_devs[dev]; idx++) {
|
|
if (pcm_substreams[dev] < 1)
|
|
pcm_substreams[dev] = 1;
|
|
if (pcm_substreams[dev] > MAX_PCM_SUBSTREAMS)
|
|
pcm_substreams[dev] = MAX_PCM_SUBSTREAMS;
|
|
if ((err = snd_card_dummy_pcm(dummy, idx, pcm_substreams[dev])) < 0)
|
|
goto __nodev;
|
|
}
|
|
if ((err = snd_card_dummy_new_mixer(dummy)) < 0)
|
|
goto __nodev;
|
|
strcpy(card->driver, "Dummy");
|
|
strcpy(card->shortname, "Dummy");
|
|
sprintf(card->longname, "Dummy %i", dev + 1);
|
|
|
|
snd_card_set_dev(card, &devptr->dev);
|
|
|
|
if ((err = snd_card_register(card)) == 0) {
|
|
platform_set_drvdata(devptr, card);
|
|
return 0;
|
|
}
|
|
__nodev:
|
|
snd_card_free(card);
|
|
return err;
|
|
}
|
|
|
|
static int snd_dummy_remove(struct platform_device *devptr)
|
|
{
|
|
snd_card_free(platform_get_drvdata(devptr));
|
|
platform_set_drvdata(devptr, NULL);
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_PM
|
|
static int snd_dummy_suspend(struct platform_device *pdev, pm_message_t state)
|
|
{
|
|
struct snd_card *card = platform_get_drvdata(pdev);
|
|
struct snd_dummy *dummy = card->private_data;
|
|
|
|
snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
|
|
snd_pcm_suspend_all(dummy->pcm);
|
|
return 0;
|
|
}
|
|
|
|
static int snd_dummy_resume(struct platform_device *pdev)
|
|
{
|
|
struct snd_card *card = platform_get_drvdata(pdev);
|
|
|
|
snd_power_change_state(card, SNDRV_CTL_POWER_D0);
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
#define SND_DUMMY_DRIVER "snd_dummy"
|
|
|
|
static struct platform_driver snd_dummy_driver = {
|
|
.probe = snd_dummy_probe,
|
|
.remove = snd_dummy_remove,
|
|
#ifdef CONFIG_PM
|
|
.suspend = snd_dummy_suspend,
|
|
.resume = snd_dummy_resume,
|
|
#endif
|
|
.driver = {
|
|
.name = SND_DUMMY_DRIVER
|
|
},
|
|
};
|
|
|
|
static void __init_or_module snd_dummy_unregister_all(void)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(devices); ++i)
|
|
platform_device_unregister(devices[i]);
|
|
platform_driver_unregister(&snd_dummy_driver);
|
|
}
|
|
|
|
static int __init alsa_card_dummy_init(void)
|
|
{
|
|
int i, cards, err;
|
|
|
|
if ((err = platform_driver_register(&snd_dummy_driver)) < 0)
|
|
return err;
|
|
|
|
cards = 0;
|
|
for (i = 0; i < SNDRV_CARDS; i++) {
|
|
struct platform_device *device;
|
|
if (! enable[i])
|
|
continue;
|
|
device = platform_device_register_simple(SND_DUMMY_DRIVER,
|
|
i, NULL, 0);
|
|
if (IS_ERR(device))
|
|
continue;
|
|
devices[i] = device;
|
|
cards++;
|
|
}
|
|
if (!cards) {
|
|
#ifdef MODULE
|
|
printk(KERN_ERR "Dummy soundcard not found or device busy\n");
|
|
#endif
|
|
snd_dummy_unregister_all();
|
|
return -ENODEV;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void __exit alsa_card_dummy_exit(void)
|
|
{
|
|
snd_dummy_unregister_all();
|
|
}
|
|
|
|
module_init(alsa_card_dummy_init)
|
|
module_exit(alsa_card_dummy_exit)
|