#include <linux/slab.h>
#include <linux/time.h>
#include <linux/wait.h>
+#include <linux/hrtimer.h>
+#include <linux/math64.h>
#include <linux/moduleparam.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_SUPPORTED_DEVICE("{{ALSA,Dummy soundcard}}");
#define MAX_PCM_DEVICES 4
-#define MAX_PCM_SUBSTREAMS 16
+#define MAX_PCM_SUBSTREAMS 128
#define MAX_MIDI_DEVICES 2
-#if 0 /* emu10k1 emulation */
-#define MAX_BUFFER_SIZE (128 * 1024)
-static int emu10k1_playback_constraints(struct snd_pcm_runtime *runtime)
-{
- int err;
- if ((err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
- return err;
- if ((err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 256, UINT_MAX)) < 0)
- return err;
- return 0;
-}
-#define add_playback_constraints emu10k1_playback_constraints
-#endif
-
-#if 0 /* RME9652 emulation */
-#define MAX_BUFFER_SIZE (26 * 64 * 1024)
-#define USE_FORMATS SNDRV_PCM_FMTBIT_S32_LE
-#define USE_CHANNELS_MIN 26
-#define USE_CHANNELS_MAX 26
-#define USE_PERIODS_MIN 2
-#define USE_PERIODS_MAX 2
-#endif
-
-#if 0 /* ICE1712 emulation */
-#define MAX_BUFFER_SIZE (256 * 1024)
-#define USE_FORMATS SNDRV_PCM_FMTBIT_S32_LE
-#define USE_CHANNELS_MIN 10
-#define USE_CHANNELS_MAX 10
-#define USE_PERIODS_MIN 1
-#define USE_PERIODS_MAX 1024
-#endif
-
-#if 0 /* UDA1341 emulation */
-#define MAX_BUFFER_SIZE (16380)
-#define USE_FORMATS SNDRV_PCM_FMTBIT_S16_LE
-#define USE_CHANNELS_MIN 2
-#define USE_CHANNELS_MAX 2
-#define USE_PERIODS_MIN 2
-#define USE_PERIODS_MAX 255
-#endif
-
-#if 0 /* simple AC97 bridge (intel8x0) with 48kHz AC97 only codec */
-#define USE_FORMATS SNDRV_PCM_FMTBIT_S16_LE
-#define USE_CHANNELS_MIN 2
-#define USE_CHANNELS_MAX 2
-#define USE_RATE SNDRV_PCM_RATE_48000
-#define USE_RATE_MIN 48000
-#define USE_RATE_MAX 48000
-#endif
-
-#if 0 /* CA0106 */
-#define USE_FORMATS SNDRV_PCM_FMTBIT_S16_LE
-#define USE_CHANNELS_MIN 2
-#define USE_CHANNELS_MAX 2
-#define USE_RATE (SNDRV_PCM_RATE_48000|SNDRV_PCM_RATE_96000|SNDRV_PCM_RATE_192000)
-#define USE_RATE_MIN 48000
-#define USE_RATE_MAX 192000
-#define MAX_BUFFER_SIZE ((65536-64)*8)
-#define MAX_PERIOD_SIZE (65536-64)
-#define USE_PERIODS_MIN 2
-#define USE_PERIODS_MAX 8
-#endif
-
-
/* defaults */
-#ifndef MAX_BUFFER_SIZE
#define MAX_BUFFER_SIZE (64*1024)
-#endif
-#ifndef MAX_PERIOD_SIZE
+#define MIN_PERIOD_SIZE 64
#define MAX_PERIOD_SIZE MAX_BUFFER_SIZE
-#endif
-#ifndef USE_FORMATS
#define USE_FORMATS (SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE)
-#endif
-#ifndef USE_RATE
#define USE_RATE SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_48000
#define USE_RATE_MIN 5500
#define USE_RATE_MAX 48000
-#endif
-#ifndef USE_CHANNELS_MIN
#define USE_CHANNELS_MIN 1
-#endif
-#ifndef USE_CHANNELS_MAX
#define USE_CHANNELS_MAX 2
-#endif
-#ifndef USE_PERIODS_MIN
#define USE_PERIODS_MIN 1
-#endif
-#ifndef USE_PERIODS_MAX
#define USE_PERIODS_MAX 1024
-#endif
-#ifndef add_playback_constraints
-#define add_playback_constraints(x) 0
-#endif
-#ifndef add_capture_constraints
-#define add_capture_constraints(x) 0
-#endif
static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-MAX */
static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* ID for this card */
static int 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};
+#ifdef CONFIG_HIGH_RES_TIMERS
+static int hrtimer = 1;
+#endif
+static int fake_buffer = 1;
module_param_array(index, int, NULL, 0444);
MODULE_PARM_DESC(index, "Index value for dummy soundcard.");
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 # (1-16) for dummy driver.");
+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(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_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 *);
+};
+
+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;
+ 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];
+ const struct dummy_timer_ops *timer_ops;
};
-struct snd_dummy_pcm {
- struct snd_dummy *dummy;
+/*
+ * 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;
+}
+
+struct dummy_model model_emu10k1 = {
+ .name = "emu10k1",
+ .playback_constraints = emu10k1_playback_constraints,
+ .buffer_bytes_max = 128 * 1024,
+};
+
+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,
+};
+
+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,
+};
+
+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,
+};
+
+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,
+};
+
+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,
+};
+
+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 {
spinlock_t lock;
struct timer_list timer;
- unsigned int pcm_size;
- unsigned int pcm_count;
- unsigned int pcm_bps; /* bytes per second */
- unsigned int pcm_jiffie; /* bytes per one jiffie */
- unsigned int pcm_irq_pos; /* IRQ position */
- unsigned int pcm_buf_pos; /* position in buffer */
+ 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 inline void snd_card_dummy_pcm_timer_start(struct snd_dummy_pcm *dpcm)
+static void dummy_systimer_rearm(struct dummy_systimer_pcm *dpcm)
{
- dpcm->timer.expires = 1 + jiffies;
+ dpcm->timer.expires = jiffies +
+ (dpcm->frac_period_rest + dpcm->rate - 1) / dpcm->rate;
add_timer(&dpcm->timer);
}
-static inline void snd_card_dummy_pcm_timer_stop(struct snd_dummy_pcm *dpcm)
+static void dummy_systimer_update(struct dummy_systimer_pcm *dpcm)
{
- del_timer(&dpcm->timer);
+ 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 snd_card_dummy_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
+static int dummy_systimer_start(struct snd_pcm_substream *substream)
{
- struct snd_pcm_runtime *runtime = substream->runtime;
- struct snd_dummy_pcm *dpcm = runtime->private_data;
- int err = 0;
+ 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);
- switch (cmd) {
- case SNDRV_PCM_TRIGGER_START:
- case SNDRV_PCM_TRIGGER_RESUME:
- snd_card_dummy_pcm_timer_start(dpcm);
- break;
- case SNDRV_PCM_TRIGGER_STOP:
- case SNDRV_PCM_TRIGGER_SUSPEND:
- snd_card_dummy_pcm_timer_stop(dpcm);
- break;
- default:
- err = -EINVAL;
- break;
- }
+ del_timer(&dpcm->timer);
spin_unlock(&dpcm->lock);
return 0;
}
-static int snd_card_dummy_pcm_prepare(struct snd_pcm_substream *substream)
+static int dummy_systimer_prepare(struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
- struct snd_dummy_pcm *dpcm = runtime->private_data;
- unsigned int bps;
-
- bps = runtime->rate * runtime->channels;
- bps *= snd_pcm_format_width(runtime->format);
- bps /= 8;
- if (bps <= 0)
- return -EINVAL;
- dpcm->pcm_bps = bps;
- dpcm->pcm_jiffie = bps / HZ;
- dpcm->pcm_size = snd_pcm_lib_buffer_bytes(substream);
- dpcm->pcm_count = snd_pcm_lib_period_bytes(substream);
- dpcm->pcm_irq_pos = 0;
- dpcm->pcm_buf_pos = 0;
+ 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 snd_card_dummy_pcm_timer_function(unsigned long data)
+static void dummy_systimer_callback(unsigned long data)
{
- struct snd_dummy_pcm *dpcm = (struct snd_dummy_pcm *)data;
+ struct dummy_systimer_pcm *dpcm = (struct dummy_systimer_pcm *)data;
unsigned long flags;
+ int elapsed = 0;
spin_lock_irqsave(&dpcm->lock, flags);
- dpcm->timer.expires = 1 + jiffies;
- add_timer(&dpcm->timer);
- dpcm->pcm_irq_pos += dpcm->pcm_jiffie;
- dpcm->pcm_buf_pos += dpcm->pcm_jiffie;
- dpcm->pcm_buf_pos %= dpcm->pcm_size;
- if (dpcm->pcm_irq_pos >= dpcm->pcm_count) {
- dpcm->pcm_irq_pos %= dpcm->pcm_count;
- spin_unlock_irqrestore(&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;
+ init_timer(&dpcm->timer);
+ dpcm->timer.data = (unsigned long) dpcm;
+ dpcm->timer.function = dummy_systimer_callback;
+ 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 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 {
+ ktime_t base_time;
+ ktime_t period_time;
+ atomic_t running;
+ struct hrtimer timer;
+ struct tasklet_struct tasklet;
+ struct snd_pcm_substream *substream;
+};
+
+static void dummy_hrtimer_pcm_elapsed(unsigned long priv)
+{
+ struct dummy_hrtimer_pcm *dpcm = (struct dummy_hrtimer_pcm *)priv;
+ if (atomic_read(&dpcm->running))
snd_pcm_period_elapsed(dpcm->substream);
- } else
- spin_unlock_irqrestore(&dpcm->lock, flags);
}
-static snd_pcm_uframes_t snd_card_dummy_pcm_pointer(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;
+ tasklet_schedule(&dpcm->tasklet);
+ 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);
+ 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);
+ hrtimer_cancel(&dpcm->timer);
+ return 0;
+}
+
+static inline void dummy_hrtimer_sync(struct dummy_hrtimer_pcm *dpcm)
+{
+ tasklet_kill(&dpcm->tasklet);
+}
+
+static snd_pcm_uframes_t
+dummy_hrtimer_pointer(struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
- struct snd_dummy_pcm *dpcm = runtime->private_data;
+ 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 bytes_to_frames(runtime, dpcm->pcm_buf_pos);
+ return 0;
}
-static struct snd_pcm_hardware snd_card_dummy_playback =
+static int dummy_hrtimer_create(struct snd_pcm_substream *substream)
{
- .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 = 64,
- .period_bytes_max = MAX_PERIOD_SIZE,
- .periods_min = USE_PERIODS_MIN,
- .periods_max = USE_PERIODS_MAX,
- .fifo_size = 0,
+ 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);
+ dpcm->timer.function = dummy_hrtimer_callback;
+ dpcm->substream = substream;
+ atomic_set(&dpcm->running, 0);
+ tasklet_init(&dpcm->tasklet, dummy_hrtimer_pcm_elapsed,
+ (unsigned long)dpcm);
+ 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 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,
};
-static struct snd_pcm_hardware snd_card_dummy_capture =
+#endif /* CONFIG_HIGH_RES_TIMERS */
+
+/*
+ * PCM interface
+ */
+
+static int dummy_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
+{
+ struct snd_dummy *dummy = snd_pcm_substream_chip(substream);
+
+ switch (cmd) {
+ case SNDRV_PCM_TRIGGER_START:
+ case SNDRV_PCM_TRIGGER_RESUME:
+ return dummy->timer_ops->start(substream);
+ case SNDRV_PCM_TRIGGER_STOP:
+ case SNDRV_PCM_TRIGGER_SUSPEND:
+ return dummy->timer_ops->stop(substream);
+ }
+ return -EINVAL;
+}
+
+static int dummy_pcm_prepare(struct snd_pcm_substream *substream)
+{
+ struct snd_dummy *dummy = snd_pcm_substream_chip(substream);
+
+ return dummy->timer_ops->prepare(substream);
+}
+
+static snd_pcm_uframes_t dummy_pcm_pointer(struct snd_pcm_substream *substream)
{
- .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
- SNDRV_PCM_INFO_RESUME | SNDRV_PCM_INFO_MMAP_VALID),
+ struct snd_dummy *dummy = snd_pcm_substream_chip(substream);
+
+ return dummy->timer_ops->pointer(substream);
+}
+
+static 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,
.channels_min = USE_CHANNELS_MIN,
.channels_max = USE_CHANNELS_MAX,
.buffer_bytes_max = MAX_BUFFER_SIZE,
- .period_bytes_min = 64,
+ .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 void snd_card_dummy_runtime_free(struct snd_pcm_runtime *runtime)
+static int dummy_pcm_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *hw_params)
{
- kfree(runtime->private_data);
-}
-
-static int snd_card_dummy_hw_params(struct snd_pcm_substream *substream,
- struct snd_pcm_hw_params *hw_params)
-{
- return snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(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 snd_pcm_lib_malloc_pages(substream,
+ params_buffer_bytes(hw_params));
}
-static int snd_card_dummy_hw_free(struct snd_pcm_substream *substream)
+static int dummy_pcm_hw_free(struct snd_pcm_substream *substream)
{
+ if (fake_buffer)
+ return 0;
return snd_pcm_lib_free_pages(substream);
}
-static struct snd_dummy_pcm *new_pcm_stream(struct snd_pcm_substream *substream)
-{
- struct snd_dummy_pcm *dpcm;
-
- dpcm = kzalloc(sizeof(*dpcm), GFP_KERNEL);
- if (! dpcm)
- return dpcm;
- init_timer(&dpcm->timer);
- dpcm->timer.data = (unsigned long) dpcm;
- dpcm->timer.function = snd_card_dummy_pcm_timer_function;
- spin_lock_init(&dpcm->lock);
- dpcm->substream = substream;
- return dpcm;
-}
-
-static int snd_card_dummy_playback_open(struct snd_pcm_substream *substream)
+static int dummy_pcm_open(struct snd_pcm_substream *substream)
{
+ struct snd_dummy *dummy = snd_pcm_substream_chip(substream);
+ struct dummy_model *model = dummy->model;
struct snd_pcm_runtime *runtime = substream->runtime;
- struct snd_dummy_pcm *dpcm;
int err;
- if ((dpcm = new_pcm_stream(substream)) == NULL)
- return -ENOMEM;
- runtime->private_data = dpcm;
- runtime->private_free = snd_card_dummy_runtime_free;
- runtime->hw = snd_card_dummy_playback;
+ dummy->timer_ops = &dummy_systimer_ops;
+#ifdef CONFIG_HIGH_RES_TIMERS
+ if (hrtimer)
+ dummy->timer_ops = &dummy_hrtimer_ops;
+#endif
+
+ err = dummy->timer_ops->create(substream);
+ if (err < 0)
+ return err;
+
+ 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 ((err = add_playback_constraints(runtime)) < 0) {
- kfree(dpcm);
+ 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) {
+ dummy->timer_ops->free(substream);
return err;
}
-
return 0;
}
-static int snd_card_dummy_capture_open(struct snd_pcm_substream *substream)
+static int dummy_pcm_close(struct snd_pcm_substream *substream)
{
- struct snd_pcm_runtime *runtime = substream->runtime;
- struct snd_dummy_pcm *dpcm;
- int err;
+ struct snd_dummy *dummy = snd_pcm_substream_chip(substream);
+ dummy->timer_ops->free(substream);
+ return 0;
+}
- if ((dpcm = new_pcm_stream(substream)) == NULL)
- return -ENOMEM;
- runtime->private_data = dpcm;
- runtime->private_free = snd_card_dummy_runtime_free;
- runtime->hw = snd_card_dummy_capture;
- 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 ((err = add_capture_constraints(runtime)) < 0) {
- kfree(dpcm);
- return err;
+/*
+ * 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 snd_card_dummy_playback_close(struct snd_pcm_substream *substream)
+static int dummy_pcm_copy(struct snd_pcm_substream *substream,
+ int channel, snd_pcm_uframes_t pos,
+ void __user *dst, snd_pcm_uframes_t count)
{
- return 0;
+ return 0; /* do nothing */
}
-static int snd_card_dummy_capture_close(struct snd_pcm_substream *substream)
+static int dummy_pcm_silence(struct snd_pcm_substream *substream,
+ int channel, snd_pcm_uframes_t pos,
+ snd_pcm_uframes_t count)
{
- return 0;
+ return 0; /* do nothing */
}
-static struct snd_pcm_ops snd_card_dummy_playback_ops = {
- .open = snd_card_dummy_playback_open,
- .close = snd_card_dummy_playback_close,
- .ioctl = snd_pcm_lib_ioctl,
- .hw_params = snd_card_dummy_hw_params,
- .hw_free = snd_card_dummy_hw_free,
- .prepare = snd_card_dummy_pcm_prepare,
- .trigger = snd_card_dummy_pcm_trigger,
- .pointer = snd_card_dummy_pcm_pointer,
+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 struct snd_pcm_ops dummy_pcm_ops = {
+ .open = dummy_pcm_open,
+ .close = dummy_pcm_close,
+ .ioctl = snd_pcm_lib_ioctl,
+ .hw_params = dummy_pcm_hw_params,
+ .hw_free = dummy_pcm_hw_free,
+ .prepare = dummy_pcm_prepare,
+ .trigger = dummy_pcm_trigger,
+ .pointer = dummy_pcm_pointer,
};
-static struct snd_pcm_ops snd_card_dummy_capture_ops = {
- .open = snd_card_dummy_capture_open,
- .close = snd_card_dummy_capture_close,
- .ioctl = snd_pcm_lib_ioctl,
- .hw_params = snd_card_dummy_hw_params,
- .hw_free = snd_card_dummy_hw_free,
- .prepare = snd_card_dummy_pcm_prepare,
- .trigger = snd_card_dummy_pcm_trigger,
- .pointer = snd_card_dummy_pcm_pointer,
+static struct snd_pcm_ops dummy_pcm_ops_no_buf = {
+ .open = dummy_pcm_open,
+ .close = dummy_pcm_close,
+ .ioctl = snd_pcm_lib_ioctl,
+ .hw_params = dummy_pcm_hw_params,
+ .hw_free = dummy_pcm_hw_free,
+ .prepare = dummy_pcm_prepare,
+ .trigger = dummy_pcm_trigger,
+ .pointer = dummy_pcm_pointer,
+ .copy = dummy_pcm_copy,
+ .silence = dummy_pcm_silence,
+ .page = dummy_pcm_page,
};
static int __devinit snd_card_dummy_pcm(struct snd_dummy *dummy, int device,
int substreams)
{
struct snd_pcm *pcm;
+ struct snd_pcm_ops *ops;
int err;
- if ((err = snd_pcm_new(dummy->card, "Dummy PCM", device,
- substreams, substreams, &pcm)) < 0)
+ err = snd_pcm_new(dummy->card, "Dummy PCM", device,
+ substreams, substreams, &pcm);
+ if (err < 0)
return err;
dummy->pcm = pcm;
- snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_card_dummy_playback_ops);
- snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_card_dummy_capture_ops);
+ 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");
- snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_CONTINUOUS,
- snd_dma_continuous_data(GFP_KERNEL),
- 0, 64*1024);
+ if (!fake_buffer) {
+ snd_pcm_lib_preallocate_pages_for_all(pcm,
+ SNDRV_DMA_TYPE_CONTINUOUS,
+ snd_dma_continuous_data(GFP_KERNEL),
+ 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, \
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)
+ err = snd_ctl_add(card, snd_ctl_new1(&snd_dummy_controls[idx], dummy));
+ if (err < 0)
return err;
}
return 0;
}
+#if defined(CONFIG_SND_DEBUG) && defined(CONFIG_PROC_FS)
+/*
+ * proc interface
+ */
+static void print_formats(struct snd_dummy *dummy,
+ struct snd_info_buffer *buffer)
+{
+ int i;
+
+ for (i = 0; i < SNDRV_PCM_FORMAT_LAST; i++) {
+ if (dummy->pcm_hw.formats & (1ULL << i))
+ snd_iprintf(buffer, " %s", snd_pcm_format_name(i));
+ }
+}
+
+static void print_rates(struct snd_dummy *dummy,
+ struct snd_info_buffer *buffer)
+{
+ static 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 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 (strict_strtoull(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 __devinit dummy_proc_init(struct snd_dummy *chip)
+{
+ struct snd_info_entry *entry;
+
+ if (!snd_card_proc_new(chip->card, "dummy_pcm", &entry)) {
+ snd_info_set_text_ops(entry, chip, dummy_proc_read);
+ entry->c.text.write = dummy_proc_write;
+ entry->mode |= S_IWUSR;
+ entry->private_data = chip;
+ }
+}
+#else
+#define dummy_proc_init(x)
+#endif /* CONFIG_SND_DEBUG && CONFIG_PROC_FS */
+
static int __devinit snd_dummy_probe(struct platform_device *devptr)
{
struct snd_card *card;
struct snd_dummy *dummy;
+ struct dummy_model *m = NULL, **mdl;
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;
+ err = snd_card_create(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;
- if ((err = snd_card_dummy_pcm(dummy, idx, pcm_substreams[dev])) < 0)
+ err = snd_card_dummy_pcm(dummy, idx, pcm_substreams[dev]);
+ if (err < 0)
goto __nodev;
}
- if ((err = snd_card_dummy_new_mixer(dummy)) < 0)
+
+ 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;
+ }
+
+ err = snd_card_dummy_new_mixer(dummy);
+ if (err < 0)
goto __nodev;
strcpy(card->driver, "Dummy");
strcpy(card->shortname, "Dummy");
sprintf(card->longname, "Dummy %i", dev + 1);
+ dummy_proc_init(dummy);
+
snd_card_set_dev(card, &devptr->dev);
- if ((err = snd_card_register(card)) == 0) {
+ err = snd_card_register(card);
+ if (err == 0) {
platform_set_drvdata(devptr, card);
return 0;
}
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;
- if ((err = platform_driver_register(&snd_dummy_driver)) < 0)
+ 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++) {
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff