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Commit d5e1ca05 authored by Jaroslav Kysela's avatar Jaroslav Kysela
Browse files

ALSA: dummy driver - add model parameter



This is a cleanup for the dummy driver. The model kernel module parameter
is introduced to select the soundcard emulation.

Signed-off-by: default avatarJaroslav Kysela <perex@perex.cz>
parent 6123637f
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+180 −110
Original line number Diff line number Diff line
@@ -45,109 +45,23 @@ MODULE_SUPPORTED_DEVICE("{{ALSA,Dummy soundcard}}");
#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;
	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;
}
#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};
@@ -162,6 +76,8 @@ 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);
@@ -193,15 +109,120 @@ struct dummy_timer_ops {
	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;
};

/*
 * 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
 */
@@ -509,7 +530,7 @@ static struct snd_pcm_hardware dummy_pcm_hardware = {
	.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,
@@ -538,6 +559,7 @@ static int dummy_pcm_hw_free(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;
	int err;

@@ -551,7 +573,7 @@ static int dummy_pcm_open(struct snd_pcm_substream *substream)
	if (err < 0)
		return err;

	runtime->hw = dummy_pcm_hardware;
	runtime->hw = dummy->pcm_hw;
	if (substream->pcm->device & 1) {
		runtime->hw.info &= ~SNDRV_PCM_INFO_INTERLEAVED;
		runtime->hw.info |= SNDRV_PCM_INFO_NONINTERLEAVED;
@@ -560,10 +582,16 @@ static int dummy_pcm_open(struct snd_pcm_substream *substream)
		runtime->hw.info &= ~(SNDRV_PCM_INFO_MMAP |
				      SNDRV_PCM_INFO_MMAP_VALID);

	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
		err = add_playback_constraints(substream->runtime);
	else
		err = add_capture_constraints(substream->runtime);
	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;
@@ -823,17 +851,19 @@ static int __devinit snd_card_dummy_new_mixer(struct snd_dummy *dummy)
/*
 * proc interface
 */
static void print_formats(struct snd_info_buffer *buffer)
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_hardware.formats & (1ULL << i))
		if (dummy->pcm_hw.formats & (1ULL << i))
			snd_iprintf(buffer, " %s", snd_pcm_format_name(i));
	}
}

static void print_rates(struct snd_info_buffer *buffer)
static void print_rates(struct snd_dummy *dummy,
			struct snd_info_buffer *buffer)
{
	static int rates[] = {
		5512, 8000, 11025, 16000, 22050, 32000, 44100, 48000,
@@ -841,19 +871,19 @@ static void print_rates(struct snd_info_buffer *buffer)
	};
	int i;

	if (dummy_pcm_hardware.rates & SNDRV_PCM_RATE_CONTINUOUS)
	if (dummy->pcm_hw.rates & SNDRV_PCM_RATE_CONTINUOUS)
		snd_iprintf(buffer, " continuous");
	if (dummy_pcm_hardware.rates & SNDRV_PCM_RATE_KNOT)
	if (dummy->pcm_hw.rates & SNDRV_PCM_RATE_KNOT)
		snd_iprintf(buffer, " knot");
	for (i = 0; i < ARRAY_SIZE(rates); i++)
		if (dummy_pcm_hardware.rates & (1 << i))
		if (dummy->pcm_hw.rates & (1 << i))
			snd_iprintf(buffer, " %d", rates[i]);
}

#define get_dummy_int_ptr(ofs) \
	(unsigned int *)((char *)&dummy_pcm_hardware + (ofs))
#define get_dummy_ll_ptr(ofs) \
	(unsigned long long *)((char *)&dummy_pcm_hardware + (ofs))
#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;
@@ -884,20 +914,21 @@ static struct dummy_hw_field fields[] = {
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(fields[i].offset));
				*get_dummy_int_ptr(dummy, fields[i].offset));
		else
			snd_iprintf(buffer, fields[i].format,
				    *get_dummy_ll_ptr(fields[i].offset));
				*get_dummy_ll_ptr(dummy, fields[i].offset));
		if (!strcmp(fields[i].name, "formats"))
			print_formats(buffer);
			print_formats(dummy, buffer);
		else if (!strcmp(fields[i].name, "rates"))
			print_rates(buffer);
			print_rates(dummy, buffer);
		snd_iprintf(buffer, "\n");
	}
}
@@ -905,6 +936,7 @@ static void dummy_proc_read(struct snd_info_entry *entry,
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))) {
@@ -924,9 +956,9 @@ static void dummy_proc_write(struct snd_info_entry *entry,
		if (strict_strtoull(item, 0, &val))
			continue;
		if (fields[i].size == sizeof(int))
			*get_dummy_int_ptr(fields[i].offset) = val;
			*get_dummy_int_ptr(dummy, fields[i].offset) = val;
		else
			*get_dummy_ll_ptr(fields[i].offset) = val;
			*get_dummy_ll_ptr(dummy, fields[i].offset) = val;
	}
}

@@ -938,6 +970,7 @@ static void __devinit dummy_proc_init(struct snd_dummy *chip)
		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
@@ -948,6 +981,7 @@ 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;

@@ -957,6 +991,15 @@ static int __devinit snd_dummy_probe(struct platform_device *devptr)
		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;
@@ -966,6 +1009,33 @@ static int __devinit snd_dummy_probe(struct platform_device *devptr)
		if (err < 0)
			goto __nodev;
	}

	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;