es1688_lib.c

优龙2410linux2.6.8内核源代码

	.prepare =		snd_es1688_playback_prepare,
	.trigger =		snd_es1688_playback_trigger,
	.pointer =		snd_es1688_playback_pointer,
};

static snd_pcm_ops_t snd_es1688_capture_ops = {
	.open =			snd_es1688_capture_open,
	.close =		snd_es1688_capture_close,
	.ioctl =		snd_es1688_ioctl,
	.hw_params =		snd_es1688_hw_params,
	.hw_free =		snd_es1688_hw_free,
	.prepare =		snd_es1688_capture_prepare,
	.trigger =		snd_es1688_capture_trigger,
	.pointer =		snd_es1688_capture_pointer,
};

static void snd_es1688_pcm_free(snd_pcm_t *pcm)
{
	es1688_t *chip = snd_magic_cast(es1688_t, pcm->private_data, return);
	chip->pcm = NULL;
	snd_pcm_lib_preallocate_free_for_all(pcm);
}

int snd_es1688_pcm(es1688_t * chip, int device, snd_pcm_t ** rpcm)
{
	snd_pcm_t *pcm;
	int err;

	if ((err = snd_pcm_new(chip->card, "ESx688", device, 1, 1, &pcm)) < 0)
		return err;

	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_es1688_playback_ops);
	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_es1688_capture_ops);

	pcm->private_data = chip;
	pcm->private_free = snd_es1688_pcm_free;
	pcm->info_flags = SNDRV_PCM_INFO_HALF_DUPLEX;
	sprintf(pcm->name, snd_es1688_chip_id(chip));
	chip->pcm = pcm;

	snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
					      snd_dma_isa_data(),
					      64*1024, 64*1024);

	if (rpcm)
		*rpcm = pcm;
	return 0;
}

/*
 *  MIXER part
 */

static int snd_es1688_info_mux(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t * uinfo)
{
	static char *texts[9] = {
		"Mic", "Mic Master", "CD", "AOUT",
		"Mic1", "Mix", "Line", "Master"
	};

	uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
	uinfo->count = 1;
	uinfo->value.enumerated.items = 8;
	if (uinfo->value.enumerated.item > 7)
		uinfo->value.enumerated.item = 7;
	strcpy(uinfo->value.enumerated.name, texts[uinfo->value.enumerated.item]);
	return 0;
}

static int snd_es1688_get_mux(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
{
	es1688_t *chip = snd_kcontrol_chip(kcontrol);
	ucontrol->value.enumerated.item[0] = snd_es1688_mixer_read(chip, ES1688_REC_DEV) & 7;
	return 0;
}

static int snd_es1688_put_mux(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
{
	es1688_t *chip = snd_kcontrol_chip(kcontrol);
	unsigned long flags;
	unsigned char oval, nval;
	int change;
	
	if (ucontrol->value.enumerated.item[0] > 8)
		return -EINVAL;
	spin_lock_irqsave(&chip->reg_lock, flags);
	oval = snd_es1688_mixer_read(chip, ES1688_REC_DEV);
	nval = (ucontrol->value.enumerated.item[0] & 7) | (oval & ~15);
	change = nval != oval;
	if (change)
		snd_es1688_mixer_write(chip, ES1688_REC_DEV, nval);
	spin_unlock_irqrestore(&chip->reg_lock, flags);
	return change;
}

#define ES1688_SINGLE(xname, xindex, reg, shift, mask, invert) \
{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
  .info = snd_es1688_info_single, \
  .get = snd_es1688_get_single, .put = snd_es1688_put_single, \
  .private_value = reg | (shift << 8) | (mask << 16) | (invert << 24) }

static int snd_es1688_info_single(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t * uinfo)
{
	int mask = (kcontrol->private_value >> 16) & 0xff;

	uinfo->type = mask == 1 ? SNDRV_CTL_ELEM_TYPE_BOOLEAN : SNDRV_CTL_ELEM_TYPE_INTEGER;
	uinfo->count = 1;
	uinfo->value.integer.min = 0;
	uinfo->value.integer.max = mask;
	return 0;
}

static int snd_es1688_get_single(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
{
	es1688_t *chip = snd_kcontrol_chip(kcontrol);
	unsigned long flags;
	int reg = kcontrol->private_value & 0xff;
	int shift = (kcontrol->private_value >> 8) & 0xff;
	int mask = (kcontrol->private_value >> 16) & 0xff;
	int invert = (kcontrol->private_value >> 24) & 0xff;
	
	spin_lock_irqsave(&chip->reg_lock, flags);
	ucontrol->value.integer.value[0] = (snd_es1688_mixer_read(chip, reg) >> shift) & mask;
	spin_unlock_irqrestore(&chip->reg_lock, flags);
	if (invert)
		ucontrol->value.integer.value[0] = mask - ucontrol->value.integer.value[0];
	return 0;
}

static int snd_es1688_put_single(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
{
	es1688_t *chip = snd_kcontrol_chip(kcontrol);
	unsigned long flags;
	int reg = kcontrol->private_value & 0xff;
	int shift = (kcontrol->private_value >> 8) & 0xff;
	int mask = (kcontrol->private_value >> 16) & 0xff;
	int invert = (kcontrol->private_value >> 24) & 0xff;
	int change;
	unsigned char oval, nval;
	
	nval = (ucontrol->value.integer.value[0] & mask);
	if (invert)
		nval = mask - nval;
	nval <<= shift;
	spin_lock_irqsave(&chip->reg_lock, flags);
	oval = snd_es1688_mixer_read(chip, reg);
	nval = (oval & ~(mask << shift)) | nval;
	change = nval != oval;
	if (change)
		snd_es1688_mixer_write(chip, reg, nval);
	spin_unlock_irqrestore(&chip->reg_lock, flags);
	return change;
}

#define ES1688_DOUBLE(xname, xindex, left_reg, right_reg, shift_left, shift_right, mask, invert) \
{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
  .info = snd_es1688_info_double, \
  .get = snd_es1688_get_double, .put = snd_es1688_put_double, \
  .private_value = left_reg | (right_reg << 8) | (shift_left << 16) | (shift_right << 19) | (mask << 24) | (invert << 22) }

static int snd_es1688_info_double(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t * uinfo)
{
	int mask = (kcontrol->private_value >> 24) & 0xff;

	uinfo->type = mask == 1 ? SNDRV_CTL_ELEM_TYPE_BOOLEAN : SNDRV_CTL_ELEM_TYPE_INTEGER;
	uinfo->count = 2;
	uinfo->value.integer.min = 0;
	uinfo->value.integer.max = mask;
	return 0;
}

static int snd_es1688_get_double(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
{
	es1688_t *chip = snd_kcontrol_chip(kcontrol);
	unsigned long flags;
	int left_reg = kcontrol->private_value & 0xff;
	int right_reg = (kcontrol->private_value >> 8) & 0xff;
	int shift_left = (kcontrol->private_value >> 16) & 0x07;
	int shift_right = (kcontrol->private_value >> 19) & 0x07;
	int mask = (kcontrol->private_value >> 24) & 0xff;
	int invert = (kcontrol->private_value >> 22) & 1;
	unsigned char left, right;
	
	spin_lock_irqsave(&chip->reg_lock, flags);
	if (left_reg < 0xa0)
		left = snd_es1688_mixer_read(chip, left_reg);
	else
		left = snd_es1688_read(chip, left_reg);
	if (left_reg != right_reg) {
		if (right_reg < 0xa0) 
			right = snd_es1688_mixer_read(chip, right_reg);
		else
			right = snd_es1688_read(chip, right_reg);
	} else
		right = left;
	spin_unlock_irqrestore(&chip->reg_lock, flags);
	ucontrol->value.integer.value[0] = (left >> shift_left) & mask;
	ucontrol->value.integer.value[1] = (right >> shift_right) & mask;
	if (invert) {
		ucontrol->value.integer.value[0] = mask - ucontrol->value.integer.value[0];
		ucontrol->value.integer.value[1] = mask - ucontrol->value.integer.value[1];
	}
	return 0;
}

static int snd_es1688_put_double(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
{
	es1688_t *chip = snd_kcontrol_chip(kcontrol);
	unsigned long flags;
	int left_reg = kcontrol->private_value & 0xff;
	int right_reg = (kcontrol->private_value >> 8) & 0xff;
	int shift_left = (kcontrol->private_value >> 16) & 0x07;
	int shift_right = (kcontrol->private_value >> 19) & 0x07;
	int mask = (kcontrol->private_value >> 24) & 0xff;
	int invert = (kcontrol->private_value >> 22) & 1;
	int change;
	unsigned char val1, val2, oval1, oval2;
	
	val1 = ucontrol->value.integer.value[0] & mask;
	val2 = ucontrol->value.integer.value[1] & mask;
	if (invert) {
		val1 = mask - val1;
		val2 = mask - val2;
	}
	val1 <<= shift_left;
	val2 <<= shift_right;
	spin_lock_irqsave(&chip->reg_lock, flags);
	if (left_reg != right_reg) {
		if (left_reg < 0xa0)
			oval1 = snd_es1688_mixer_read(chip, left_reg);
		else
			oval1 = snd_es1688_read(chip, left_reg);
		if (right_reg < 0xa0)
			oval2 = snd_es1688_mixer_read(chip, right_reg);
		else
			oval2 = snd_es1688_read(chip, right_reg);
		val1 = (oval1 & ~(mask << shift_left)) | val1;
		val2 = (oval2 & ~(mask << shift_right)) | val2;
		change = val1 != oval1 || val2 != oval2;
		if (change) {
			if (left_reg < 0xa0)
				snd_es1688_mixer_write(chip, left_reg, val1);
			else
				snd_es1688_write(chip, left_reg, val1);
			if (right_reg < 0xa0)
				snd_es1688_mixer_write(chip, right_reg, val1);
			else
				snd_es1688_write(chip, right_reg, val1);
		}
	} else {
		if (left_reg < 0xa0)
			oval1 = snd_es1688_mixer_read(chip, left_reg);
		else
			oval1 = snd_es1688_read(chip, left_reg);
		val1 = (oval1 & ~((mask << shift_left) | (mask << shift_right))) | val1 | val2;
		change = val1 != oval1;
		if (change) {
			if (left_reg < 0xa0)
				snd_es1688_mixer_write(chip, left_reg, val1);
			else
				snd_es1688_write(chip, left_reg, val1);
		}
			
	}
	spin_unlock_irqrestore(&chip->reg_lock, flags);
	return change;
}

#define ES1688_CONTROLS (sizeof(snd_es1688_controls)/sizeof(snd_kcontrol_new_t))

static snd_kcontrol_new_t snd_es1688_controls[] = {
ES1688_DOUBLE("Master Playback Volume", 0, ES1688_MASTER_DEV, ES1688_MASTER_DEV, 4, 0, 15, 0),
ES1688_DOUBLE("PCM Playback Volume", 0, ES1688_PCM_DEV, ES1688_PCM_DEV, 4, 0, 15, 0),
ES1688_DOUBLE("Line Playback Volume", 0, ES1688_LINE_DEV, ES1688_LINE_DEV, 4, 0, 15, 0),
ES1688_DOUBLE("CD Playback Volume", 0, ES1688_CD_DEV, ES1688_CD_DEV, 4, 0, 15, 0),
ES1688_DOUBLE("FM Playback Volume", 0, ES1688_FM_DEV, ES1688_FM_DEV, 4, 0, 15, 0),
ES1688_DOUBLE("Mic Playback Volume", 0, ES1688_MIC_DEV, ES1688_MIC_DEV, 4, 0, 15, 0),
ES1688_DOUBLE("Aux Playback Volume", 0, ES1688_AUX_DEV, ES1688_AUX_DEV, 4, 0, 15, 0),
ES1688_SINGLE("PC Speaker Playback Volume", 0, ES1688_SPEAKER_DEV, 0, 7, 0),
ES1688_DOUBLE("Capture Volume", 0, ES1688_RECLEV_DEV, ES1688_RECLEV_DEV, 4, 0, 15, 0),
ES1688_SINGLE("Capture Switch", 0, ES1688_REC_DEV, 4, 1, 1),
{
	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
	.name = "Capture Source",
	.info = snd_es1688_info_mux,
	.get = snd_es1688_get_mux,
	.put = snd_es1688_put_mux,
},
};

#define ES1688_INIT_TABLE_SIZE (sizeof(snd_es1688_init_table)/2)

static unsigned char snd_es1688_init_table[][2] = {
	{ ES1688_MASTER_DEV, 0 },
	{ ES1688_PCM_DEV, 0 },
	{ ES1688_LINE_DEV, 0 },
	{ ES1688_CD_DEV, 0 },
	{ ES1688_FM_DEV, 0 },
	{ ES1688_MIC_DEV, 0 },
	{ ES1688_AUX_DEV, 0 },
	{ ES1688_SPEAKER_DEV, 0 },
	{ ES1688_RECLEV_DEV, 0 },
	{ ES1688_REC_DEV, 0x17 }
};
                                        
int snd_es1688_mixer(es1688_t *chip)
{
	snd_card_t *card;
	unsigned int idx;
	int err;
	unsigned char reg, val;

	snd_assert(chip != NULL && chip->card != NULL, return -EINVAL);

	card = chip->card;

	strcpy(card->mixername, snd_es1688_chip_id(chip));

	for (idx = 0; idx < ES1688_CONTROLS; idx++) {
		if ((err = snd_ctl_add(card, snd_ctl_new1(&snd_es1688_controls[idx], chip))) < 0)
			return err;
	}
	for (idx = 0; idx < ES1688_INIT_TABLE_SIZE; idx++) {
		reg = snd_es1688_init_table[idx][0];
		val = snd_es1688_init_table[idx][1];
		if (reg < 0xa0)
			snd_es1688_mixer_write(chip, reg, val);
		else
			snd_es1688_write(chip, reg, val);
	}
	return 0;
}

EXPORT_SYMBOL(snd_es1688_mixer_write);
EXPORT_SYMBOL(snd_es1688_mixer_read);
EXPORT_SYMBOL(snd_es1688_interrupt);
EXPORT_SYMBOL(snd_es1688_create);
EXPORT_SYMBOL(snd_es1688_pcm);
EXPORT_SYMBOL(snd_es1688_mixer);

/*
 *  INIT part
 */

static int __init alsa_es1688_init(void)
{
	return 0;
}

static void __exit alsa_es1688_exit(void)
{
}

module_init(alsa_es1688_init)
module_exit(alsa_es1688_exit)