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

sound/drivers/dummy.c

+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;