cs4231.c

linux 内核源代码

	snd_cs4231_mce_down(chip);

	spin_lock_irqsave(&chip->lock, flags);

	for (i = 0; i < 32; i++)	/* ok.. fill all CS4231 registers */
		snd_cs4231_out(chip, i, *ptr++);

	spin_unlock_irqrestore(&chip->lock, flags);

	snd_cs4231_mce_up(chip);

	snd_cs4231_mce_down(chip);

	mdelay(2);

	return 0;		/* all things are ok.. */
}

static struct snd_pcm_hardware snd_cs4231_playback = {
	.info			= SNDRV_PCM_INFO_MMAP |
				  SNDRV_PCM_INFO_INTERLEAVED |
				  SNDRV_PCM_INFO_MMAP_VALID |
				  SNDRV_PCM_INFO_SYNC_START,
	.formats		= SNDRV_PCM_FMTBIT_MU_LAW |
				  SNDRV_PCM_FMTBIT_A_LAW |
				  SNDRV_PCM_FMTBIT_IMA_ADPCM |
				  SNDRV_PCM_FMTBIT_U8 |
				  SNDRV_PCM_FMTBIT_S16_LE |
				  SNDRV_PCM_FMTBIT_S16_BE,
	.rates			= SNDRV_PCM_RATE_KNOT |
				  SNDRV_PCM_RATE_8000_48000,
	.rate_min		= 5510,
	.rate_max		= 48000,
	.channels_min		= 1,
	.channels_max		= 2,
	.buffer_bytes_max	= 32 * 1024,
	.period_bytes_min	= 64,
	.period_bytes_max	= 32 * 1024,
	.periods_min		= 1,
	.periods_max		= 1024,
};

static struct snd_pcm_hardware snd_cs4231_capture = {
	.info			= SNDRV_PCM_INFO_MMAP |
				  SNDRV_PCM_INFO_INTERLEAVED |
				  SNDRV_PCM_INFO_MMAP_VALID |
				  SNDRV_PCM_INFO_SYNC_START,
	.formats		= SNDRV_PCM_FMTBIT_MU_LAW |
				  SNDRV_PCM_FMTBIT_A_LAW |
				  SNDRV_PCM_FMTBIT_IMA_ADPCM |
				  SNDRV_PCM_FMTBIT_U8 |
				  SNDRV_PCM_FMTBIT_S16_LE |
				  SNDRV_PCM_FMTBIT_S16_BE,
	.rates			= SNDRV_PCM_RATE_KNOT |
				  SNDRV_PCM_RATE_8000_48000,
	.rate_min		= 5510,
	.rate_max		= 48000,
	.channels_min		= 1,
	.channels_max		= 2,
	.buffer_bytes_max	= 32 * 1024,
	.period_bytes_min	= 64,
	.period_bytes_max	= 32 * 1024,
	.periods_min		= 1,
	.periods_max		= 1024,
};

static int snd_cs4231_playback_open(struct snd_pcm_substream *substream)
{
	struct snd_cs4231 *chip = snd_pcm_substream_chip(substream);
	struct snd_pcm_runtime *runtime = substream->runtime;
	int err;

	runtime->hw = snd_cs4231_playback;

	err = snd_cs4231_open(chip, CS4231_MODE_PLAY);
	if (err < 0) {
		snd_free_pages(runtime->dma_area, runtime->dma_bytes);
		return err;
	}
	chip->playback_substream = substream;
	chip->p_periods_sent = 0;
	snd_pcm_set_sync(substream);
	snd_cs4231_xrate(runtime);

	return 0;
}

static int snd_cs4231_capture_open(struct snd_pcm_substream *substream)
{
	struct snd_cs4231 *chip = snd_pcm_substream_chip(substream);
	struct snd_pcm_runtime *runtime = substream->runtime;
	int err;

	runtime->hw = snd_cs4231_capture;

	err = snd_cs4231_open(chip, CS4231_MODE_RECORD);
	if (err < 0) {
		snd_free_pages(runtime->dma_area, runtime->dma_bytes);
		return err;
	}
	chip->capture_substream = substream;
	chip->c_periods_sent = 0;
	snd_pcm_set_sync(substream);
	snd_cs4231_xrate(runtime);

	return 0;
}

static int snd_cs4231_playback_close(struct snd_pcm_substream *substream)
{
	struct snd_cs4231 *chip = snd_pcm_substream_chip(substream);

	snd_cs4231_close(chip, CS4231_MODE_PLAY);
	chip->playback_substream = NULL;

	return 0;
}

static int snd_cs4231_capture_close(struct snd_pcm_substream *substream)
{
	struct snd_cs4231 *chip = snd_pcm_substream_chip(substream);

	snd_cs4231_close(chip, CS4231_MODE_RECORD);
	chip->capture_substream = NULL;

	return 0;
}

/* XXX We can do some power-management, in particular on EBUS using
 * XXX the audio AUXIO register...
 */

static struct snd_pcm_ops snd_cs4231_playback_ops = {
	.open		=	snd_cs4231_playback_open,
	.close		=	snd_cs4231_playback_close,
	.ioctl		=	snd_pcm_lib_ioctl,
	.hw_params	=	snd_cs4231_playback_hw_params,
	.hw_free	=	snd_pcm_lib_free_pages,
	.prepare	=	snd_cs4231_playback_prepare,
	.trigger	=	snd_cs4231_trigger,
	.pointer	=	snd_cs4231_playback_pointer,
};

static struct snd_pcm_ops snd_cs4231_capture_ops = {
	.open		=	snd_cs4231_capture_open,
	.close		=	snd_cs4231_capture_close,
	.ioctl		=	snd_pcm_lib_ioctl,
	.hw_params	=	snd_cs4231_capture_hw_params,
	.hw_free	=	snd_pcm_lib_free_pages,
	.prepare	=	snd_cs4231_capture_prepare,
	.trigger	=	snd_cs4231_trigger,
	.pointer	=	snd_cs4231_capture_pointer,
};

static int __init snd_cs4231_pcm(struct snd_card *card)
{
	struct snd_cs4231 *chip = card->private_data;
	struct snd_pcm *pcm;
	int err;

	err = snd_pcm_new(card, "CS4231", 0, 1, 1, &pcm);
	if (err < 0)
		return err;

	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK,
			&snd_cs4231_playback_ops);
	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE,
			&snd_cs4231_capture_ops);

	/* global setup */
	pcm->private_data = chip;
	pcm->info_flags = SNDRV_PCM_INFO_JOINT_DUPLEX;
	strcpy(pcm->name, "CS4231");

	chip->p_dma.preallocate(chip, pcm);

	chip->pcm = pcm;

	return 0;
}

static int __init snd_cs4231_timer(struct snd_card *card)
{
	struct snd_cs4231 *chip = card->private_data;
	struct snd_timer *timer;
	struct snd_timer_id tid;
	int err;

	/* Timer initialization */
	tid.dev_class = SNDRV_TIMER_CLASS_CARD;
	tid.dev_sclass = SNDRV_TIMER_SCLASS_NONE;
	tid.card = card->number;
	tid.device = 0;
	tid.subdevice = 0;
	err = snd_timer_new(card, "CS4231", &tid, &timer);
	if (err < 0)
		return err;
	strcpy(timer->name, "CS4231");
	timer->private_data = chip;
	timer->hw = snd_cs4231_timer_table;
	chip->timer = timer;

	return 0;
}

/*
 *  MIXER part
 */

static int snd_cs4231_info_mux(struct snd_kcontrol *kcontrol,
			       struct snd_ctl_elem_info *uinfo)
{
	static char *texts[4] = {
		"Line", "CD", "Mic", "Mix"
	};

	uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
	uinfo->count = 2;
	uinfo->value.enumerated.items = 4;
	if (uinfo->value.enumerated.item > 3)
		uinfo->value.enumerated.item = 3;
	strcpy(uinfo->value.enumerated.name,
		texts[uinfo->value.enumerated.item]);

	return 0;
}

static int snd_cs4231_get_mux(struct snd_kcontrol *kcontrol,
			      struct snd_ctl_elem_value *ucontrol)
{
	struct snd_cs4231 *chip = snd_kcontrol_chip(kcontrol);
	unsigned long flags;

	spin_lock_irqsave(&chip->lock, flags);
	ucontrol->value.enumerated.item[0] =
		(chip->image[CS4231_LEFT_INPUT] & CS4231_MIXS_ALL) >> 6;
	ucontrol->value.enumerated.item[1] =
		(chip->image[CS4231_RIGHT_INPUT] & CS4231_MIXS_ALL) >> 6;
	spin_unlock_irqrestore(&chip->lock, flags);

	return 0;
}

static int snd_cs4231_put_mux(struct snd_kcontrol *kcontrol,
			      struct snd_ctl_elem_value *ucontrol)
{
	struct snd_cs4231 *chip = snd_kcontrol_chip(kcontrol);
	unsigned long flags;
	unsigned short left, right;
	int change;

	if (ucontrol->value.enumerated.item[0] > 3 ||
	    ucontrol->value.enumerated.item[1] > 3)
		return -EINVAL;
	left = ucontrol->value.enumerated.item[0] << 6;
	right = ucontrol->value.enumerated.item[1] << 6;

	spin_lock_irqsave(&chip->lock, flags);

	left = (chip->image[CS4231_LEFT_INPUT] & ~CS4231_MIXS_ALL) | left;
	right = (chip->image[CS4231_RIGHT_INPUT] & ~CS4231_MIXS_ALL) | right;
	change = left != chip->image[CS4231_LEFT_INPUT] ||
		 right != chip->image[CS4231_RIGHT_INPUT];
	snd_cs4231_out(chip, CS4231_LEFT_INPUT, left);
	snd_cs4231_out(chip, CS4231_RIGHT_INPUT, right);

	spin_unlock_irqrestore(&chip->lock, flags);

	return change;
}

static int snd_cs4231_info_single(struct snd_kcontrol *kcontrol,
				  struct snd_ctl_elem_info *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_cs4231_get_single(struct snd_kcontrol *kcontrol,
				 struct snd_ctl_elem_value *ucontrol)
{
	struct snd_cs4231 *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->lock, flags);

	ucontrol->value.integer.value[0] = (chip->image[reg] >> shift) & mask;

	spin_unlock_irqrestore(&chip->lock, flags);

	if (invert)
		ucontrol->value.integer.value[0] =
			(mask - ucontrol->value.integer.value[0]);

	return 0;
}

static int snd_cs4231_put_single(struct snd_kcontrol *kcontrol,
				 struct snd_ctl_elem_value *ucontrol)
{
	struct snd_cs4231 *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 short val;

	val = (ucontrol->value.integer.value[0] & mask);
	if (invert)
		val = mask - val;
	val <<= shift;

	spin_lock_irqsave(&chip->lock, flags);

	val = (chip->image[reg] & ~(mask << shift)) | val;
	change = val != chip->image[reg];
	snd_cs4231_out(chip, reg, val);

	spin_unlock_irqrestore(&chip->lock, flags);

	return change;
}

static int snd_cs4231_info_double(struct snd_kcontrol *kcontrol,
				  struct snd_ctl_elem_info *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_cs4231_get_double(struct snd_kcontrol *kcontrol,
				 struct snd_ctl_elem_value *ucontrol)
{
	struct snd_cs4231 *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;

	spin_lock_irqsave(&chip->lock, flags);

	ucontrol->value.integer.value[0] =
		(chip->image[left_reg] >> shift_left) & mask;
	ucontrol->value.integer.value[1] =
		(chip->image[right_reg] >> shift_right) & mask;

	spin_unlock_irqrestore(&chip->lock, flags);

	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_cs4231_put_double(struct snd_kcontrol *kcontrol,
				 struct snd_ctl_elem_value *ucontrol)
{
	struct snd_cs4231 *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 short val1, val2;

	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->lock, flags);

	val1 = (chip->image[left_reg] & ~(mask << shift_left)) | val1;
	val2 = (chip->image[right_reg] & ~(mask << shift_right)) | val2;
	change = val1 != chip->image[left_reg];
	change |= val2 != chip->image[right_reg];
	snd_cs4231_out(chip, left_reg, val1);
	snd_cs4231_out(chip, right_reg, val2);

	spin_unlock_irqrestore(&chip->lock, flags);

	return change;
}

#define CS4231_SINGLE(xname, xindex, reg, shift, mask, invert) \
{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = (xname), .index = (xindex), \
  .info = snd_cs4231_info_single,	\
  .get = snd_cs4231_get_single, .put = snd_cs4231_put_single,	\
  .private_value = (reg) | ((shift) << 8) | ((mask) << 16) | ((invert) << 24) }

#define CS4231_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_cs4231_info_double,	\
  .get = snd_cs4231_get_double, .put = snd_cs4231_put_double,	\
  .private_value = (left_reg) | ((right_reg) << 8) | ((shift_left) << 16) | \
		   ((shift_right) << 19) | ((mask) << 24) | ((invert) << 22) }

static struct snd_kcontrol_new snd_cs4231_controls[] __initdata = {
CS4231_DOUBLE("PCM Playback Switch", 0, CS4231_LEFT_OUTPUT,
		CS4231_RIGHT_OUTPUT, 7, 7, 1, 1),
CS4231_DOUBLE("PCM Playback Volume", 0, CS4231_LEFT_OUTPUT,
		CS4231_RIGHT_OUTPUT, 0, 0, 63, 1),
CS4231_DOUBLE("Line Playback Switch", 0, CS4231_LEFT_LINE_IN,
		CS4231_RIGHT_LINE_IN, 7, 7, 1, 1),
CS4231_DOUBLE("Line Playback Volume", 0, CS4231_LEFT_LINE_IN,
		CS4231_RIGHT_LINE_IN, 0, 0, 31, 1),
CS4231_DOUBLE("Aux Playback Switch", 0, CS4231_AUX1_LEFT_INPUT,
		CS4231_AUX1_RIGHT_INPUT, 7, 7, 1, 1),
CS4231_DOUBLE("Aux Playback Volume", 0, CS4231_AUX1_LEFT_INPUT,
		CS4231_AUX1_RIGHT_INPUT, 0, 0, 31, 1),
CS4231_DOUBLE("Aux Playback Switch", 1, CS4231_AUX2_LEFT_INPUT,
		CS4231_AUX2_RIGHT_INPUT, 7, 7, 1, 1),
CS4231_DOUBLE("Aux Playback Volume", 1, CS4231_AUX2_LEFT_INPUT,
		CS4231_AUX2_RIGHT_INPUT, 0, 0, 31, 1),
CS4231_SINGLE("Mono Playback Switch", 0, CS4231_MONO_CTRL, 7, 1, 1),
CS4231_SINGLE("Mono Playback Volume", 0, CS4231_MONO_CTRL, 0, 15, 1),
CS4231_SINGLE("Mono Output Playback Switch", 0, CS4231_MONO_CTRL, 6, 1, 1),
CS4231_SINGLE("Mono Output Playback Bypass", 0, CS4231_MONO_CTRL, 5, 1, 0),
CS4231_DOUBLE("Capture Volume", 0, CS4231_LEFT_INPUT, CS4231_RIGHT_INPUT, 0, 0,
		15, 0),
{
	.iface	= SNDRV_CTL_ELEM_IFACE_MIXER,
	.name	= "Capture Source",
	.info	= snd_cs4231_info_mux,
	.get	= snd_cs4231_get_mux,
	.put	= snd_cs4231_put_mux,
},
CS4231_DOUBLE("Mic Boost", 0, CS4231_LEFT_INPUT, CS4231_RIGHT_INPUT, 5, 5,
		1, 0),
CS4231_SINGLE("Loopback Capture Switch", 0, CS4231_LOOPBACK, 0, 1, 0),
CS4231_SINGLE("Loopback Capture Volume", 0, CS4231_LOOPBACK, 2, 63, 1),
/* SPARC specific uses of XCTL{0,1} general purpose outputs.  */
CS4231_SINGLE("Line Out Switch", 0, CS4231_PIN_CTRL, 6, 1, 1),
CS4231_SINGLE("Headphone Out Switch", 0, CS4231_PIN_CTRL, 7, 1, 1)
};

static int __init snd_cs4231_mixer(struct snd_card *card)
{
	struct snd_cs4231 *chip = card->private_data;
	int err, idx;

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

	strcpy(card->mixername, chip->pcm->name);

	for (idx = 0; idx < ARRAY_SIZE(snd_cs4231_controls); idx++) {
		err = snd_ctl_add(card,
				 snd_ctl_new1(&snd_cs4231_controls[idx], chip));
		if (err < 0)
			return err;
	}
	return 0;
}

static int dev;

static int __init cs4231_attach_begin(struct snd_card **rcard)
{
	struct snd_card *card;
	struct snd_cs4231 *chip;

	*rcard = NULL;

	if (dev >= SNDRV_CARDS)
		return -ENODEV;

	if (!enable[dev]) {
		dev++;
		return -ENOENT;
	}

	card = snd_card_new(index[dev], id[dev], THIS_MODULE,
			    sizeof(struct snd_cs4231));
	if (card == NULL)
		return -ENOMEM;

	strcpy(card->driver, "CS4231");
	strcpy(card->shortname, "Sun CS4231");

	chip = card->private_data;
	chip->card = card;

	*rcard = card;
	return 0;
}

static int __init cs4231_attach_finish(struct snd_card *card)
{
	struct snd_cs4231 *chip = card->private_data;
	int err;

	err = snd_cs4231_pcm(card);
	if (err < 0)
		goto out_err;

	err = snd_cs4231_mixer(card);
	if (err < 0)
		goto out_err;

	err = snd_cs4231_timer(card);
	if (err < 0)
		goto out_err;

	err = snd_card_register(card);
	if (err < 0)
		goto out_err;