1191 строка
32 KiB
C
1191 строка
32 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
/*
|
|
* Dummy soundcard
|
|
* Copyright (c) by Jaroslav Kysela <perex@perex.cz>
|
|
*/
|
|
|
|
#include <linux/init.h>
|
|
#include <linux/err.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/jiffies.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/time.h>
|
|
#include <linux/wait.h>
|
|
#include <linux/hrtimer.h>
|
|
#include <linux/math64.h>
|
|
#include <linux/module.h>
|
|
#include <sound/core.h>
|
|
#include <sound/control.h>
|
|
#include <sound/tlv.h>
|
|
#include <sound/pcm.h>
|
|
#include <sound/rawmidi.h>
|
|
#include <sound/info.h>
|
|
#include <sound/initval.h>
|
|
|
|
MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
|
|
MODULE_DESCRIPTION("Dummy soundcard (/dev/null)");
|
|
MODULE_LICENSE("GPL");
|
|
|
|
#define MAX_PCM_DEVICES 4
|
|
#define MAX_PCM_SUBSTREAMS 128
|
|
#define MAX_MIDI_DEVICES 2
|
|
|
|
/* defaults */
|
|
#define MAX_BUFFER_SIZE (64*1024)
|
|
#define MIN_PERIOD_SIZE 64
|
|
#define MAX_PERIOD_SIZE MAX_BUFFER_SIZE
|
|
#define USE_FORMATS (SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE)
|
|
#define USE_RATE SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_48000
|
|
#define USE_RATE_MIN 5500
|
|
#define USE_RATE_MAX 48000
|
|
#define USE_CHANNELS_MIN 1
|
|
#define USE_CHANNELS_MAX 2
|
|
#define USE_PERIODS_MIN 1
|
|
#define USE_PERIODS_MAX 1024
|
|
#define USE_MIXER_VOLUME_LEVEL_MIN -50
|
|
#define USE_MIXER_VOLUME_LEVEL_MAX 100
|
|
|
|
static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-MAX */
|
|
static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* ID for this card */
|
|
static bool enable[SNDRV_CARDS] = {1, [1 ... (SNDRV_CARDS - 1)] = 0};
|
|
static char *model[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = NULL};
|
|
static int pcm_devs[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 1};
|
|
static int pcm_substreams[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 8};
|
|
//static int midi_devs[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 2};
|
|
static int mixer_volume_level_min = USE_MIXER_VOLUME_LEVEL_MIN;
|
|
static int mixer_volume_level_max = USE_MIXER_VOLUME_LEVEL_MAX;
|
|
#ifdef CONFIG_HIGH_RES_TIMERS
|
|
static bool hrtimer = 1;
|
|
#endif
|
|
static bool fake_buffer = 1;
|
|
|
|
module_param_array(index, int, NULL, 0444);
|
|
MODULE_PARM_DESC(index, "Index value for dummy soundcard.");
|
|
module_param_array(id, charp, NULL, 0444);
|
|
MODULE_PARM_DESC(id, "ID string for dummy soundcard.");
|
|
module_param_array(enable, bool, NULL, 0444);
|
|
MODULE_PARM_DESC(enable, "Enable this dummy soundcard.");
|
|
module_param_array(model, charp, NULL, 0444);
|
|
MODULE_PARM_DESC(model, "Soundcard model.");
|
|
module_param_array(pcm_devs, int, NULL, 0444);
|
|
MODULE_PARM_DESC(pcm_devs, "PCM devices # (0-4) for dummy driver.");
|
|
module_param_array(pcm_substreams, int, NULL, 0444);
|
|
MODULE_PARM_DESC(pcm_substreams, "PCM substreams # (1-128) for dummy driver.");
|
|
//module_param_array(midi_devs, int, NULL, 0444);
|
|
//MODULE_PARM_DESC(midi_devs, "MIDI devices # (0-2) for dummy driver.");
|
|
module_param(mixer_volume_level_min, int, 0444);
|
|
MODULE_PARM_DESC(mixer_volume_level_min, "Minimum mixer volume level for dummy driver. Default: -50");
|
|
module_param(mixer_volume_level_max, int, 0444);
|
|
MODULE_PARM_DESC(mixer_volume_level_max, "Maximum mixer volume level for dummy driver. Default: 100");
|
|
module_param(fake_buffer, bool, 0444);
|
|
MODULE_PARM_DESC(fake_buffer, "Fake buffer allocations.");
|
|
#ifdef CONFIG_HIGH_RES_TIMERS
|
|
module_param(hrtimer, bool, 0644);
|
|
MODULE_PARM_DESC(hrtimer, "Use hrtimer as the timer source.");
|
|
#endif
|
|
|
|
static struct platform_device *devices[SNDRV_CARDS];
|
|
|
|
#define MIXER_ADDR_MASTER 0
|
|
#define MIXER_ADDR_LINE 1
|
|
#define MIXER_ADDR_MIC 2
|
|
#define MIXER_ADDR_SYNTH 3
|
|
#define MIXER_ADDR_CD 4
|
|
#define MIXER_ADDR_LAST 4
|
|
|
|
struct dummy_timer_ops {
|
|
int (*create)(struct snd_pcm_substream *);
|
|
void (*free)(struct snd_pcm_substream *);
|
|
int (*prepare)(struct snd_pcm_substream *);
|
|
int (*start)(struct snd_pcm_substream *);
|
|
int (*stop)(struct snd_pcm_substream *);
|
|
snd_pcm_uframes_t (*pointer)(struct snd_pcm_substream *);
|
|
};
|
|
|
|
#define get_dummy_ops(substream) \
|
|
(*(const struct dummy_timer_ops **)(substream)->runtime->private_data)
|
|
|
|
struct dummy_model {
|
|
const char *name;
|
|
int (*playback_constraints)(struct snd_pcm_runtime *runtime);
|
|
int (*capture_constraints)(struct snd_pcm_runtime *runtime);
|
|
u64 formats;
|
|
size_t buffer_bytes_max;
|
|
size_t period_bytes_min;
|
|
size_t period_bytes_max;
|
|
unsigned int periods_min;
|
|
unsigned int periods_max;
|
|
unsigned int rates;
|
|
unsigned int rate_min;
|
|
unsigned int rate_max;
|
|
unsigned int channels_min;
|
|
unsigned int channels_max;
|
|
};
|
|
|
|
struct snd_dummy {
|
|
struct snd_card *card;
|
|
const struct dummy_model *model;
|
|
struct snd_pcm *pcm;
|
|
struct snd_pcm_hardware pcm_hw;
|
|
spinlock_t mixer_lock;
|
|
int mixer_volume[MIXER_ADDR_LAST+1][2];
|
|
int capture_source[MIXER_ADDR_LAST+1][2];
|
|
int iobox;
|
|
struct snd_kcontrol *cd_volume_ctl;
|
|
struct snd_kcontrol *cd_switch_ctl;
|
|
};
|
|
|
|
/*
|
|
* card models
|
|
*/
|
|
|
|
static int emu10k1_playback_constraints(struct snd_pcm_runtime *runtime)
|
|
{
|
|
int err;
|
|
err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
|
|
if (err < 0)
|
|
return err;
|
|
err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 256, UINT_MAX);
|
|
if (err < 0)
|
|
return err;
|
|
return 0;
|
|
}
|
|
|
|
static const struct dummy_model model_emu10k1 = {
|
|
.name = "emu10k1",
|
|
.playback_constraints = emu10k1_playback_constraints,
|
|
.buffer_bytes_max = 128 * 1024,
|
|
};
|
|
|
|
static const struct dummy_model model_rme9652 = {
|
|
.name = "rme9652",
|
|
.buffer_bytes_max = 26 * 64 * 1024,
|
|
.formats = SNDRV_PCM_FMTBIT_S32_LE,
|
|
.channels_min = 26,
|
|
.channels_max = 26,
|
|
.periods_min = 2,
|
|
.periods_max = 2,
|
|
};
|
|
|
|
static const struct dummy_model model_ice1712 = {
|
|
.name = "ice1712",
|
|
.buffer_bytes_max = 256 * 1024,
|
|
.formats = SNDRV_PCM_FMTBIT_S32_LE,
|
|
.channels_min = 10,
|
|
.channels_max = 10,
|
|
.periods_min = 1,
|
|
.periods_max = 1024,
|
|
};
|
|
|
|
static const struct dummy_model model_uda1341 = {
|
|
.name = "uda1341",
|
|
.buffer_bytes_max = 16380,
|
|
.formats = SNDRV_PCM_FMTBIT_S16_LE,
|
|
.channels_min = 2,
|
|
.channels_max = 2,
|
|
.periods_min = 2,
|
|
.periods_max = 255,
|
|
};
|
|
|
|
static const struct dummy_model model_ac97 = {
|
|
.name = "ac97",
|
|
.formats = SNDRV_PCM_FMTBIT_S16_LE,
|
|
.channels_min = 2,
|
|
.channels_max = 2,
|
|
.rates = SNDRV_PCM_RATE_48000,
|
|
.rate_min = 48000,
|
|
.rate_max = 48000,
|
|
};
|
|
|
|
static const struct dummy_model model_ca0106 = {
|
|
.name = "ca0106",
|
|
.formats = SNDRV_PCM_FMTBIT_S16_LE,
|
|
.buffer_bytes_max = ((65536-64)*8),
|
|
.period_bytes_max = (65536-64),
|
|
.periods_min = 2,
|
|
.periods_max = 8,
|
|
.channels_min = 2,
|
|
.channels_max = 2,
|
|
.rates = SNDRV_PCM_RATE_48000|SNDRV_PCM_RATE_96000|SNDRV_PCM_RATE_192000,
|
|
.rate_min = 48000,
|
|
.rate_max = 192000,
|
|
};
|
|
|
|
static const struct dummy_model *dummy_models[] = {
|
|
&model_emu10k1,
|
|
&model_rme9652,
|
|
&model_ice1712,
|
|
&model_uda1341,
|
|
&model_ac97,
|
|
&model_ca0106,
|
|
NULL
|
|
};
|
|
|
|
/*
|
|
* system timer interface
|
|
*/
|
|
|
|
struct dummy_systimer_pcm {
|
|
/* ops must be the first item */
|
|
const struct dummy_timer_ops *timer_ops;
|
|
spinlock_t lock;
|
|
struct timer_list timer;
|
|
unsigned long base_time;
|
|
unsigned int frac_pos; /* fractional sample position (based HZ) */
|
|
unsigned int frac_period_rest;
|
|
unsigned int frac_buffer_size; /* buffer_size * HZ */
|
|
unsigned int frac_period_size; /* period_size * HZ */
|
|
unsigned int rate;
|
|
int elapsed;
|
|
struct snd_pcm_substream *substream;
|
|
};
|
|
|
|
static void dummy_systimer_rearm(struct dummy_systimer_pcm *dpcm)
|
|
{
|
|
mod_timer(&dpcm->timer, jiffies +
|
|
DIV_ROUND_UP(dpcm->frac_period_rest, dpcm->rate));
|
|
}
|
|
|
|
static void dummy_systimer_update(struct dummy_systimer_pcm *dpcm)
|
|
{
|
|
unsigned long delta;
|
|
|
|
delta = jiffies - dpcm->base_time;
|
|
if (!delta)
|
|
return;
|
|
dpcm->base_time += delta;
|
|
delta *= dpcm->rate;
|
|
dpcm->frac_pos += delta;
|
|
while (dpcm->frac_pos >= dpcm->frac_buffer_size)
|
|
dpcm->frac_pos -= dpcm->frac_buffer_size;
|
|
while (dpcm->frac_period_rest <= delta) {
|
|
dpcm->elapsed++;
|
|
dpcm->frac_period_rest += dpcm->frac_period_size;
|
|
}
|
|
dpcm->frac_period_rest -= delta;
|
|
}
|
|
|
|
static int dummy_systimer_start(struct snd_pcm_substream *substream)
|
|
{
|
|
struct dummy_systimer_pcm *dpcm = substream->runtime->private_data;
|
|
spin_lock(&dpcm->lock);
|
|
dpcm->base_time = jiffies;
|
|
dummy_systimer_rearm(dpcm);
|
|
spin_unlock(&dpcm->lock);
|
|
return 0;
|
|
}
|
|
|
|
static int dummy_systimer_stop(struct snd_pcm_substream *substream)
|
|
{
|
|
struct dummy_systimer_pcm *dpcm = substream->runtime->private_data;
|
|
spin_lock(&dpcm->lock);
|
|
del_timer(&dpcm->timer);
|
|
spin_unlock(&dpcm->lock);
|
|
return 0;
|
|
}
|
|
|
|
static int dummy_systimer_prepare(struct snd_pcm_substream *substream)
|
|
{
|
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
|
struct dummy_systimer_pcm *dpcm = runtime->private_data;
|
|
|
|
dpcm->frac_pos = 0;
|
|
dpcm->rate = runtime->rate;
|
|
dpcm->frac_buffer_size = runtime->buffer_size * HZ;
|
|
dpcm->frac_period_size = runtime->period_size * HZ;
|
|
dpcm->frac_period_rest = dpcm->frac_period_size;
|
|
dpcm->elapsed = 0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void dummy_systimer_callback(struct timer_list *t)
|
|
{
|
|
struct dummy_systimer_pcm *dpcm = from_timer(dpcm, t, timer);
|
|
unsigned long flags;
|
|
int elapsed = 0;
|
|
|
|
spin_lock_irqsave(&dpcm->lock, flags);
|
|
dummy_systimer_update(dpcm);
|
|
dummy_systimer_rearm(dpcm);
|
|
elapsed = dpcm->elapsed;
|
|
dpcm->elapsed = 0;
|
|
spin_unlock_irqrestore(&dpcm->lock, flags);
|
|
if (elapsed)
|
|
snd_pcm_period_elapsed(dpcm->substream);
|
|
}
|
|
|
|
static snd_pcm_uframes_t
|
|
dummy_systimer_pointer(struct snd_pcm_substream *substream)
|
|
{
|
|
struct dummy_systimer_pcm *dpcm = substream->runtime->private_data;
|
|
snd_pcm_uframes_t pos;
|
|
|
|
spin_lock(&dpcm->lock);
|
|
dummy_systimer_update(dpcm);
|
|
pos = dpcm->frac_pos / HZ;
|
|
spin_unlock(&dpcm->lock);
|
|
return pos;
|
|
}
|
|
|
|
static int dummy_systimer_create(struct snd_pcm_substream *substream)
|
|
{
|
|
struct dummy_systimer_pcm *dpcm;
|
|
|
|
dpcm = kzalloc(sizeof(*dpcm), GFP_KERNEL);
|
|
if (!dpcm)
|
|
return -ENOMEM;
|
|
substream->runtime->private_data = dpcm;
|
|
timer_setup(&dpcm->timer, dummy_systimer_callback, 0);
|
|
spin_lock_init(&dpcm->lock);
|
|
dpcm->substream = substream;
|
|
return 0;
|
|
}
|
|
|
|
static void dummy_systimer_free(struct snd_pcm_substream *substream)
|
|
{
|
|
kfree(substream->runtime->private_data);
|
|
}
|
|
|
|
static const struct dummy_timer_ops dummy_systimer_ops = {
|
|
.create = dummy_systimer_create,
|
|
.free = dummy_systimer_free,
|
|
.prepare = dummy_systimer_prepare,
|
|
.start = dummy_systimer_start,
|
|
.stop = dummy_systimer_stop,
|
|
.pointer = dummy_systimer_pointer,
|
|
};
|
|
|
|
#ifdef CONFIG_HIGH_RES_TIMERS
|
|
/*
|
|
* hrtimer interface
|
|
*/
|
|
|
|
struct dummy_hrtimer_pcm {
|
|
/* ops must be the first item */
|
|
const struct dummy_timer_ops *timer_ops;
|
|
ktime_t base_time;
|
|
ktime_t period_time;
|
|
atomic_t running;
|
|
struct hrtimer timer;
|
|
struct snd_pcm_substream *substream;
|
|
};
|
|
|
|
static enum hrtimer_restart dummy_hrtimer_callback(struct hrtimer *timer)
|
|
{
|
|
struct dummy_hrtimer_pcm *dpcm;
|
|
|
|
dpcm = container_of(timer, struct dummy_hrtimer_pcm, timer);
|
|
if (!atomic_read(&dpcm->running))
|
|
return HRTIMER_NORESTART;
|
|
/*
|
|
* In cases of XRUN and draining, this calls .trigger to stop PCM
|
|
* substream.
|
|
*/
|
|
snd_pcm_period_elapsed(dpcm->substream);
|
|
if (!atomic_read(&dpcm->running))
|
|
return HRTIMER_NORESTART;
|
|
|
|
hrtimer_forward_now(timer, dpcm->period_time);
|
|
return HRTIMER_RESTART;
|
|
}
|
|
|
|
static int dummy_hrtimer_start(struct snd_pcm_substream *substream)
|
|
{
|
|
struct dummy_hrtimer_pcm *dpcm = substream->runtime->private_data;
|
|
|
|
dpcm->base_time = hrtimer_cb_get_time(&dpcm->timer);
|
|
hrtimer_start(&dpcm->timer, dpcm->period_time, HRTIMER_MODE_REL_SOFT);
|
|
atomic_set(&dpcm->running, 1);
|
|
return 0;
|
|
}
|
|
|
|
static int dummy_hrtimer_stop(struct snd_pcm_substream *substream)
|
|
{
|
|
struct dummy_hrtimer_pcm *dpcm = substream->runtime->private_data;
|
|
|
|
atomic_set(&dpcm->running, 0);
|
|
if (!hrtimer_callback_running(&dpcm->timer))
|
|
hrtimer_cancel(&dpcm->timer);
|
|
return 0;
|
|
}
|
|
|
|
static inline void dummy_hrtimer_sync(struct dummy_hrtimer_pcm *dpcm)
|
|
{
|
|
hrtimer_cancel(&dpcm->timer);
|
|
}
|
|
|
|
static snd_pcm_uframes_t
|
|
dummy_hrtimer_pointer(struct snd_pcm_substream *substream)
|
|
{
|
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
|
struct dummy_hrtimer_pcm *dpcm = runtime->private_data;
|
|
u64 delta;
|
|
u32 pos;
|
|
|
|
delta = ktime_us_delta(hrtimer_cb_get_time(&dpcm->timer),
|
|
dpcm->base_time);
|
|
delta = div_u64(delta * runtime->rate + 999999, 1000000);
|
|
div_u64_rem(delta, runtime->buffer_size, &pos);
|
|
return pos;
|
|
}
|
|
|
|
static int dummy_hrtimer_prepare(struct snd_pcm_substream *substream)
|
|
{
|
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
|
struct dummy_hrtimer_pcm *dpcm = runtime->private_data;
|
|
unsigned int period, rate;
|
|
long sec;
|
|
unsigned long nsecs;
|
|
|
|
dummy_hrtimer_sync(dpcm);
|
|
period = runtime->period_size;
|
|
rate = runtime->rate;
|
|
sec = period / rate;
|
|
period %= rate;
|
|
nsecs = div_u64((u64)period * 1000000000UL + rate - 1, rate);
|
|
dpcm->period_time = ktime_set(sec, nsecs);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int dummy_hrtimer_create(struct snd_pcm_substream *substream)
|
|
{
|
|
struct dummy_hrtimer_pcm *dpcm;
|
|
|
|
dpcm = kzalloc(sizeof(*dpcm), GFP_KERNEL);
|
|
if (!dpcm)
|
|
return -ENOMEM;
|
|
substream->runtime->private_data = dpcm;
|
|
hrtimer_init(&dpcm->timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL_SOFT);
|
|
dpcm->timer.function = dummy_hrtimer_callback;
|
|
dpcm->substream = substream;
|
|
atomic_set(&dpcm->running, 0);
|
|
return 0;
|
|
}
|
|
|
|
static void dummy_hrtimer_free(struct snd_pcm_substream *substream)
|
|
{
|
|
struct dummy_hrtimer_pcm *dpcm = substream->runtime->private_data;
|
|
dummy_hrtimer_sync(dpcm);
|
|
kfree(dpcm);
|
|
}
|
|
|
|
static const struct dummy_timer_ops dummy_hrtimer_ops = {
|
|
.create = dummy_hrtimer_create,
|
|
.free = dummy_hrtimer_free,
|
|
.prepare = dummy_hrtimer_prepare,
|
|
.start = dummy_hrtimer_start,
|
|
.stop = dummy_hrtimer_stop,
|
|
.pointer = dummy_hrtimer_pointer,
|
|
};
|
|
|
|
#endif /* CONFIG_HIGH_RES_TIMERS */
|
|
|
|
/*
|
|
* PCM interface
|
|
*/
|
|
|
|
static int dummy_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
|
|
{
|
|
switch (cmd) {
|
|
case SNDRV_PCM_TRIGGER_START:
|
|
case SNDRV_PCM_TRIGGER_RESUME:
|
|
return get_dummy_ops(substream)->start(substream);
|
|
case SNDRV_PCM_TRIGGER_STOP:
|
|
case SNDRV_PCM_TRIGGER_SUSPEND:
|
|
return get_dummy_ops(substream)->stop(substream);
|
|
}
|
|
return -EINVAL;
|
|
}
|
|
|
|
static int dummy_pcm_prepare(struct snd_pcm_substream *substream)
|
|
{
|
|
return get_dummy_ops(substream)->prepare(substream);
|
|
}
|
|
|
|
static snd_pcm_uframes_t dummy_pcm_pointer(struct snd_pcm_substream *substream)
|
|
{
|
|
return get_dummy_ops(substream)->pointer(substream);
|
|
}
|
|
|
|
static const struct snd_pcm_hardware dummy_pcm_hardware = {
|
|
.info = (SNDRV_PCM_INFO_MMAP |
|
|
SNDRV_PCM_INFO_INTERLEAVED |
|
|
SNDRV_PCM_INFO_RESUME |
|
|
SNDRV_PCM_INFO_MMAP_VALID),
|
|
.formats = USE_FORMATS,
|
|
.rates = USE_RATE,
|
|
.rate_min = USE_RATE_MIN,
|
|
.rate_max = USE_RATE_MAX,
|
|
.channels_min = USE_CHANNELS_MIN,
|
|
.channels_max = USE_CHANNELS_MAX,
|
|
.buffer_bytes_max = MAX_BUFFER_SIZE,
|
|
.period_bytes_min = MIN_PERIOD_SIZE,
|
|
.period_bytes_max = MAX_PERIOD_SIZE,
|
|
.periods_min = USE_PERIODS_MIN,
|
|
.periods_max = USE_PERIODS_MAX,
|
|
.fifo_size = 0,
|
|
};
|
|
|
|
static int dummy_pcm_hw_params(struct snd_pcm_substream *substream,
|
|
struct snd_pcm_hw_params *hw_params)
|
|
{
|
|
if (fake_buffer) {
|
|
/* runtime->dma_bytes has to be set manually to allow mmap */
|
|
substream->runtime->dma_bytes = params_buffer_bytes(hw_params);
|
|
return 0;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int dummy_pcm_open(struct snd_pcm_substream *substream)
|
|
{
|
|
struct snd_dummy *dummy = snd_pcm_substream_chip(substream);
|
|
const struct dummy_model *model = dummy->model;
|
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
|
const struct dummy_timer_ops *ops;
|
|
int err;
|
|
|
|
ops = &dummy_systimer_ops;
|
|
#ifdef CONFIG_HIGH_RES_TIMERS
|
|
if (hrtimer)
|
|
ops = &dummy_hrtimer_ops;
|
|
#endif
|
|
|
|
err = ops->create(substream);
|
|
if (err < 0)
|
|
return err;
|
|
get_dummy_ops(substream) = ops;
|
|
|
|
runtime->hw = dummy->pcm_hw;
|
|
if (substream->pcm->device & 1) {
|
|
runtime->hw.info &= ~SNDRV_PCM_INFO_INTERLEAVED;
|
|
runtime->hw.info |= SNDRV_PCM_INFO_NONINTERLEAVED;
|
|
}
|
|
if (substream->pcm->device & 2)
|
|
runtime->hw.info &= ~(SNDRV_PCM_INFO_MMAP |
|
|
SNDRV_PCM_INFO_MMAP_VALID);
|
|
|
|
if (model == NULL)
|
|
return 0;
|
|
|
|
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
|
|
if (model->playback_constraints)
|
|
err = model->playback_constraints(substream->runtime);
|
|
} else {
|
|
if (model->capture_constraints)
|
|
err = model->capture_constraints(substream->runtime);
|
|
}
|
|
if (err < 0) {
|
|
get_dummy_ops(substream)->free(substream);
|
|
return err;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int dummy_pcm_close(struct snd_pcm_substream *substream)
|
|
{
|
|
get_dummy_ops(substream)->free(substream);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* dummy buffer handling
|
|
*/
|
|
|
|
static void *dummy_page[2];
|
|
|
|
static void free_fake_buffer(void)
|
|
{
|
|
if (fake_buffer) {
|
|
int i;
|
|
for (i = 0; i < 2; i++)
|
|
if (dummy_page[i]) {
|
|
free_page((unsigned long)dummy_page[i]);
|
|
dummy_page[i] = NULL;
|
|
}
|
|
}
|
|
}
|
|
|
|
static int alloc_fake_buffer(void)
|
|
{
|
|
int i;
|
|
|
|
if (!fake_buffer)
|
|
return 0;
|
|
for (i = 0; i < 2; i++) {
|
|
dummy_page[i] = (void *)get_zeroed_page(GFP_KERNEL);
|
|
if (!dummy_page[i]) {
|
|
free_fake_buffer();
|
|
return -ENOMEM;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int dummy_pcm_copy(struct snd_pcm_substream *substream,
|
|
int channel, unsigned long pos,
|
|
struct iov_iter *iter, unsigned long bytes)
|
|
{
|
|
return 0; /* do nothing */
|
|
}
|
|
|
|
static int dummy_pcm_silence(struct snd_pcm_substream *substream,
|
|
int channel, unsigned long pos,
|
|
unsigned long bytes)
|
|
{
|
|
return 0; /* do nothing */
|
|
}
|
|
|
|
static struct page *dummy_pcm_page(struct snd_pcm_substream *substream,
|
|
unsigned long offset)
|
|
{
|
|
return virt_to_page(dummy_page[substream->stream]); /* the same page */
|
|
}
|
|
|
|
static const struct snd_pcm_ops dummy_pcm_ops = {
|
|
.open = dummy_pcm_open,
|
|
.close = dummy_pcm_close,
|
|
.hw_params = dummy_pcm_hw_params,
|
|
.prepare = dummy_pcm_prepare,
|
|
.trigger = dummy_pcm_trigger,
|
|
.pointer = dummy_pcm_pointer,
|
|
};
|
|
|
|
static const struct snd_pcm_ops dummy_pcm_ops_no_buf = {
|
|
.open = dummy_pcm_open,
|
|
.close = dummy_pcm_close,
|
|
.hw_params = dummy_pcm_hw_params,
|
|
.prepare = dummy_pcm_prepare,
|
|
.trigger = dummy_pcm_trigger,
|
|
.pointer = dummy_pcm_pointer,
|
|
.copy = dummy_pcm_copy,
|
|
.fill_silence = dummy_pcm_silence,
|
|
.page = dummy_pcm_page,
|
|
};
|
|
|
|
static int snd_card_dummy_pcm(struct snd_dummy *dummy, int device,
|
|
int substreams)
|
|
{
|
|
struct snd_pcm *pcm;
|
|
const struct snd_pcm_ops *ops;
|
|
int err;
|
|
|
|
err = snd_pcm_new(dummy->card, "Dummy PCM", device,
|
|
substreams, substreams, &pcm);
|
|
if (err < 0)
|
|
return err;
|
|
dummy->pcm = pcm;
|
|
if (fake_buffer)
|
|
ops = &dummy_pcm_ops_no_buf;
|
|
else
|
|
ops = &dummy_pcm_ops;
|
|
snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, ops);
|
|
snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, ops);
|
|
pcm->private_data = dummy;
|
|
pcm->info_flags = 0;
|
|
strcpy(pcm->name, "Dummy PCM");
|
|
if (!fake_buffer) {
|
|
snd_pcm_set_managed_buffer_all(pcm,
|
|
SNDRV_DMA_TYPE_CONTINUOUS,
|
|
NULL,
|
|
0, 64*1024);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* mixer interface
|
|
*/
|
|
|
|
#define DUMMY_VOLUME(xname, xindex, addr) \
|
|
{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, \
|
|
.access = SNDRV_CTL_ELEM_ACCESS_READWRITE | SNDRV_CTL_ELEM_ACCESS_TLV_READ, \
|
|
.name = xname, .index = xindex, \
|
|
.info = snd_dummy_volume_info, \
|
|
.get = snd_dummy_volume_get, .put = snd_dummy_volume_put, \
|
|
.private_value = addr, \
|
|
.tlv = { .p = db_scale_dummy } }
|
|
|
|
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 = mixer_volume_level_min;
|
|
uinfo->value.integer.max = mixer_volume_level_max;
|
|
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 < mixer_volume_level_min)
|
|
left = mixer_volume_level_min;
|
|
if (left > mixer_volume_level_max)
|
|
left = mixer_volume_level_max;
|
|
right = ucontrol->value.integer.value[1];
|
|
if (right < mixer_volume_level_min)
|
|
right = mixer_volume_level_min;
|
|
if (right > mixer_volume_level_max)
|
|
right = mixer_volume_level_max;
|
|
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;
|
|
}
|
|
|
|
static const DECLARE_TLV_DB_SCALE(db_scale_dummy, -4500, 30, 0);
|
|
|
|
#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 }
|
|
|
|
#define snd_dummy_capsrc_info snd_ctl_boolean_stereo_info
|
|
|
|
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 int snd_dummy_iobox_info(struct snd_kcontrol *kcontrol,
|
|
struct snd_ctl_elem_info *info)
|
|
{
|
|
static const char *const names[] = { "None", "CD Player" };
|
|
|
|
return snd_ctl_enum_info(info, 1, 2, names);
|
|
}
|
|
|
|
static int snd_dummy_iobox_get(struct snd_kcontrol *kcontrol,
|
|
struct snd_ctl_elem_value *value)
|
|
{
|
|
struct snd_dummy *dummy = snd_kcontrol_chip(kcontrol);
|
|
|
|
value->value.enumerated.item[0] = dummy->iobox;
|
|
return 0;
|
|
}
|
|
|
|
static int snd_dummy_iobox_put(struct snd_kcontrol *kcontrol,
|
|
struct snd_ctl_elem_value *value)
|
|
{
|
|
struct snd_dummy *dummy = snd_kcontrol_chip(kcontrol);
|
|
int changed;
|
|
|
|
if (value->value.enumerated.item[0] > 1)
|
|
return -EINVAL;
|
|
|
|
changed = value->value.enumerated.item[0] != dummy->iobox;
|
|
if (changed) {
|
|
dummy->iobox = value->value.enumerated.item[0];
|
|
|
|
if (dummy->iobox) {
|
|
dummy->cd_volume_ctl->vd[0].access &=
|
|
~SNDRV_CTL_ELEM_ACCESS_INACTIVE;
|
|
dummy->cd_switch_ctl->vd[0].access &=
|
|
~SNDRV_CTL_ELEM_ACCESS_INACTIVE;
|
|
} else {
|
|
dummy->cd_volume_ctl->vd[0].access |=
|
|
SNDRV_CTL_ELEM_ACCESS_INACTIVE;
|
|
dummy->cd_switch_ctl->vd[0].access |=
|
|
SNDRV_CTL_ELEM_ACCESS_INACTIVE;
|
|
}
|
|
|
|
snd_ctl_notify(dummy->card, SNDRV_CTL_EVENT_MASK_INFO,
|
|
&dummy->cd_volume_ctl->id);
|
|
snd_ctl_notify(dummy->card, SNDRV_CTL_EVENT_MASK_INFO,
|
|
&dummy->cd_switch_ctl->id);
|
|
}
|
|
|
|
return changed;
|
|
}
|
|
|
|
static const 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_SYNTH),
|
|
DUMMY_VOLUME("Line Volume", 0, MIXER_ADDR_LINE),
|
|
DUMMY_CAPSRC("Line Capture Switch", 0, MIXER_ADDR_LINE),
|
|
DUMMY_VOLUME("Mic Volume", 0, MIXER_ADDR_MIC),
|
|
DUMMY_CAPSRC("Mic Capture Switch", 0, MIXER_ADDR_MIC),
|
|
DUMMY_VOLUME("CD Volume", 0, MIXER_ADDR_CD),
|
|
DUMMY_CAPSRC("CD Capture Switch", 0, MIXER_ADDR_CD),
|
|
{
|
|
.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
|
|
.name = "External I/O Box",
|
|
.info = snd_dummy_iobox_info,
|
|
.get = snd_dummy_iobox_get,
|
|
.put = snd_dummy_iobox_put,
|
|
},
|
|
};
|
|
|
|
static int snd_card_dummy_new_mixer(struct snd_dummy *dummy)
|
|
{
|
|
struct snd_card *card = dummy->card;
|
|
struct snd_kcontrol *kcontrol;
|
|
unsigned int idx;
|
|
int err;
|
|
|
|
spin_lock_init(&dummy->mixer_lock);
|
|
strcpy(card->mixername, "Dummy Mixer");
|
|
dummy->iobox = 1;
|
|
|
|
for (idx = 0; idx < ARRAY_SIZE(snd_dummy_controls); idx++) {
|
|
kcontrol = snd_ctl_new1(&snd_dummy_controls[idx], dummy);
|
|
err = snd_ctl_add(card, kcontrol);
|
|
if (err < 0)
|
|
return err;
|
|
if (!strcmp(kcontrol->id.name, "CD Volume"))
|
|
dummy->cd_volume_ctl = kcontrol;
|
|
else if (!strcmp(kcontrol->id.name, "CD Capture Switch"))
|
|
dummy->cd_switch_ctl = kcontrol;
|
|
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
#if defined(CONFIG_SND_DEBUG) && defined(CONFIG_SND_PROC_FS)
|
|
/*
|
|
* proc interface
|
|
*/
|
|
static void print_formats(struct snd_dummy *dummy,
|
|
struct snd_info_buffer *buffer)
|
|
{
|
|
snd_pcm_format_t i;
|
|
|
|
pcm_for_each_format(i) {
|
|
if (dummy->pcm_hw.formats & pcm_format_to_bits(i))
|
|
snd_iprintf(buffer, " %s", snd_pcm_format_name(i));
|
|
}
|
|
}
|
|
|
|
static void print_rates(struct snd_dummy *dummy,
|
|
struct snd_info_buffer *buffer)
|
|
{
|
|
static const int rates[] = {
|
|
5512, 8000, 11025, 16000, 22050, 32000, 44100, 48000,
|
|
64000, 88200, 96000, 176400, 192000,
|
|
};
|
|
int i;
|
|
|
|
if (dummy->pcm_hw.rates & SNDRV_PCM_RATE_CONTINUOUS)
|
|
snd_iprintf(buffer, " continuous");
|
|
if (dummy->pcm_hw.rates & SNDRV_PCM_RATE_KNOT)
|
|
snd_iprintf(buffer, " knot");
|
|
for (i = 0; i < ARRAY_SIZE(rates); i++)
|
|
if (dummy->pcm_hw.rates & (1 << i))
|
|
snd_iprintf(buffer, " %d", rates[i]);
|
|
}
|
|
|
|
#define get_dummy_int_ptr(dummy, ofs) \
|
|
(unsigned int *)((char *)&((dummy)->pcm_hw) + (ofs))
|
|
#define get_dummy_ll_ptr(dummy, ofs) \
|
|
(unsigned long long *)((char *)&((dummy)->pcm_hw) + (ofs))
|
|
|
|
struct dummy_hw_field {
|
|
const char *name;
|
|
const char *format;
|
|
unsigned int offset;
|
|
unsigned int size;
|
|
};
|
|
#define FIELD_ENTRY(item, fmt) { \
|
|
.name = #item, \
|
|
.format = fmt, \
|
|
.offset = offsetof(struct snd_pcm_hardware, item), \
|
|
.size = sizeof(dummy_pcm_hardware.item) }
|
|
|
|
static const struct dummy_hw_field fields[] = {
|
|
FIELD_ENTRY(formats, "%#llx"),
|
|
FIELD_ENTRY(rates, "%#x"),
|
|
FIELD_ENTRY(rate_min, "%d"),
|
|
FIELD_ENTRY(rate_max, "%d"),
|
|
FIELD_ENTRY(channels_min, "%d"),
|
|
FIELD_ENTRY(channels_max, "%d"),
|
|
FIELD_ENTRY(buffer_bytes_max, "%ld"),
|
|
FIELD_ENTRY(period_bytes_min, "%ld"),
|
|
FIELD_ENTRY(period_bytes_max, "%ld"),
|
|
FIELD_ENTRY(periods_min, "%d"),
|
|
FIELD_ENTRY(periods_max, "%d"),
|
|
};
|
|
|
|
static void dummy_proc_read(struct snd_info_entry *entry,
|
|
struct snd_info_buffer *buffer)
|
|
{
|
|
struct snd_dummy *dummy = entry->private_data;
|
|
int i;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(fields); i++) {
|
|
snd_iprintf(buffer, "%s ", fields[i].name);
|
|
if (fields[i].size == sizeof(int))
|
|
snd_iprintf(buffer, fields[i].format,
|
|
*get_dummy_int_ptr(dummy, fields[i].offset));
|
|
else
|
|
snd_iprintf(buffer, fields[i].format,
|
|
*get_dummy_ll_ptr(dummy, fields[i].offset));
|
|
if (!strcmp(fields[i].name, "formats"))
|
|
print_formats(dummy, buffer);
|
|
else if (!strcmp(fields[i].name, "rates"))
|
|
print_rates(dummy, buffer);
|
|
snd_iprintf(buffer, "\n");
|
|
}
|
|
}
|
|
|
|
static void dummy_proc_write(struct snd_info_entry *entry,
|
|
struct snd_info_buffer *buffer)
|
|
{
|
|
struct snd_dummy *dummy = entry->private_data;
|
|
char line[64];
|
|
|
|
while (!snd_info_get_line(buffer, line, sizeof(line))) {
|
|
char item[20];
|
|
const char *ptr;
|
|
unsigned long long val;
|
|
int i;
|
|
|
|
ptr = snd_info_get_str(item, line, sizeof(item));
|
|
for (i = 0; i < ARRAY_SIZE(fields); i++) {
|
|
if (!strcmp(item, fields[i].name))
|
|
break;
|
|
}
|
|
if (i >= ARRAY_SIZE(fields))
|
|
continue;
|
|
snd_info_get_str(item, ptr, sizeof(item));
|
|
if (kstrtoull(item, 0, &val))
|
|
continue;
|
|
if (fields[i].size == sizeof(int))
|
|
*get_dummy_int_ptr(dummy, fields[i].offset) = val;
|
|
else
|
|
*get_dummy_ll_ptr(dummy, fields[i].offset) = val;
|
|
}
|
|
}
|
|
|
|
static void dummy_proc_init(struct snd_dummy *chip)
|
|
{
|
|
snd_card_rw_proc_new(chip->card, "dummy_pcm", chip,
|
|
dummy_proc_read, dummy_proc_write);
|
|
}
|
|
#else
|
|
#define dummy_proc_init(x)
|
|
#endif /* CONFIG_SND_DEBUG && CONFIG_SND_PROC_FS */
|
|
|
|
static int snd_dummy_probe(struct platform_device *devptr)
|
|
{
|
|
struct snd_card *card;
|
|
struct snd_dummy *dummy;
|
|
const struct dummy_model *m = NULL, **mdl;
|
|
int idx, err;
|
|
int dev = devptr->id;
|
|
|
|
err = snd_devm_card_new(&devptr->dev, index[dev], id[dev], THIS_MODULE,
|
|
sizeof(struct snd_dummy), &card);
|
|
if (err < 0)
|
|
return err;
|
|
dummy = card->private_data;
|
|
dummy->card = card;
|
|
for (mdl = dummy_models; *mdl && model[dev]; mdl++) {
|
|
if (strcmp(model[dev], (*mdl)->name) == 0) {
|
|
printk(KERN_INFO
|
|
"snd-dummy: Using model '%s' for card %i\n",
|
|
(*mdl)->name, card->number);
|
|
m = dummy->model = *mdl;
|
|
break;
|
|
}
|
|
}
|
|
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;
|
|
err = snd_card_dummy_pcm(dummy, idx, pcm_substreams[dev]);
|
|
if (err < 0)
|
|
return err;
|
|
}
|
|
|
|
dummy->pcm_hw = dummy_pcm_hardware;
|
|
if (m) {
|
|
if (m->formats)
|
|
dummy->pcm_hw.formats = m->formats;
|
|
if (m->buffer_bytes_max)
|
|
dummy->pcm_hw.buffer_bytes_max = m->buffer_bytes_max;
|
|
if (m->period_bytes_min)
|
|
dummy->pcm_hw.period_bytes_min = m->period_bytes_min;
|
|
if (m->period_bytes_max)
|
|
dummy->pcm_hw.period_bytes_max = m->period_bytes_max;
|
|
if (m->periods_min)
|
|
dummy->pcm_hw.periods_min = m->periods_min;
|
|
if (m->periods_max)
|
|
dummy->pcm_hw.periods_max = m->periods_max;
|
|
if (m->rates)
|
|
dummy->pcm_hw.rates = m->rates;
|
|
if (m->rate_min)
|
|
dummy->pcm_hw.rate_min = m->rate_min;
|
|
if (m->rate_max)
|
|
dummy->pcm_hw.rate_max = m->rate_max;
|
|
if (m->channels_min)
|
|
dummy->pcm_hw.channels_min = m->channels_min;
|
|
if (m->channels_max)
|
|
dummy->pcm_hw.channels_max = m->channels_max;
|
|
}
|
|
|
|
if (mixer_volume_level_min > mixer_volume_level_max) {
|
|
pr_warn("snd-dummy: Invalid mixer volume level: min=%d, max=%d. Fall back to default value.\n",
|
|
mixer_volume_level_min, mixer_volume_level_max);
|
|
mixer_volume_level_min = USE_MIXER_VOLUME_LEVEL_MIN;
|
|
mixer_volume_level_max = USE_MIXER_VOLUME_LEVEL_MAX;
|
|
}
|
|
err = snd_card_dummy_new_mixer(dummy);
|
|
if (err < 0)
|
|
return err;
|
|
strcpy(card->driver, "Dummy");
|
|
strcpy(card->shortname, "Dummy");
|
|
sprintf(card->longname, "Dummy %i", dev + 1);
|
|
|
|
dummy_proc_init(dummy);
|
|
|
|
err = snd_card_register(card);
|
|
if (err < 0)
|
|
return err;
|
|
platform_set_drvdata(devptr, card);
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_PM_SLEEP
|
|
static int snd_dummy_suspend(struct device *pdev)
|
|
{
|
|
struct snd_card *card = dev_get_drvdata(pdev);
|
|
|
|
snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
|
|
return 0;
|
|
}
|
|
|
|
static int snd_dummy_resume(struct device *pdev)
|
|
{
|
|
struct snd_card *card = dev_get_drvdata(pdev);
|
|
|
|
snd_power_change_state(card, SNDRV_CTL_POWER_D0);
|
|
return 0;
|
|
}
|
|
|
|
static SIMPLE_DEV_PM_OPS(snd_dummy_pm, snd_dummy_suspend, snd_dummy_resume);
|
|
#define SND_DUMMY_PM_OPS &snd_dummy_pm
|
|
#else
|
|
#define SND_DUMMY_PM_OPS NULL
|
|
#endif
|
|
|
|
#define SND_DUMMY_DRIVER "snd_dummy"
|
|
|
|
static struct platform_driver snd_dummy_driver = {
|
|
.probe = snd_dummy_probe,
|
|
.driver = {
|
|
.name = SND_DUMMY_DRIVER,
|
|
.pm = SND_DUMMY_PM_OPS,
|
|
},
|
|
};
|
|
|
|
static void 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);
|
|
free_fake_buffer();
|
|
}
|
|
|
|
static int __init alsa_card_dummy_init(void)
|
|
{
|
|
int i, cards, err;
|
|
|
|
err = platform_driver_register(&snd_dummy_driver);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
err = alloc_fake_buffer();
|
|
if (err < 0) {
|
|
platform_driver_unregister(&snd_dummy_driver);
|
|
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;
|
|
if (!platform_get_drvdata(device)) {
|
|
platform_device_unregister(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)
|