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Commit 861391d3 authored by Andy Owen's avatar Andy Owen Committed by Takashi Iwai
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ALSA: ca0106: Create a nice spot for mapping channels to dacs. 



This is to allow a future patch to have card specific mappings between
dacs, which is required since the Sound Blaster 5.1vx seems to have a
different mapping to what was previously used.

Signed-off-by: default avatarAndy Owen <andy-alsa@ultra-premium.com>
Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
parent 9bfd9413

sound/pci/ca0106/ca0106_main.c

+29 −11
Original line number Diff line number Diff line
@@ -493,16 +493,18 @@ static void snd_ca0106_pcm_free_substream(struct snd_pcm_runtime *runtime) 
}



static const int spi_dacd_reg[] = {

	[PCM_FRONT_CHANNEL]	= SPI_DACD4_REG,

	[PCM_REAR_CHANNEL]	= SPI_DACD0_REG,

	[PCM_CENTER_LFE_CHANNEL]= SPI_DACD2_REG,

	[PCM_UNKNOWN_CHANNEL]	= SPI_DACD1_REG,

	SPI_DACD0_REG,

	SPI_DACD1_REG,

	SPI_DACD2_REG,

	0,

	SPI_DACD4_REG,

};

static const int spi_dacd_bit[] = {

	[PCM_FRONT_CHANNEL]	= SPI_DACD4_BIT,

	[PCM_REAR_CHANNEL]	= SPI_DACD0_BIT,

	[PCM_CENTER_LFE_CHANNEL]= SPI_DACD2_BIT,

	[PCM_UNKNOWN_CHANNEL]	= SPI_DACD1_BIT,

	SPI_DACD0_BIT,

	SPI_DACD1_BIT,

	SPI_DACD2_BIT,

	0,

	SPI_DACD4_BIT,

};



static void restore_spdif_bits(struct snd_ca0106 *chip, int idx)
@@ -514,18 +516,34 @@ static void restore_spdif_bits(struct snd_ca0106 *chip, int idx) 
	}

}



static int snd_ca0106_channel_dac(struct snd_ca0106_details *details,

				  int channel_id)

{

	switch (channel_id) {

	case PCM_FRONT_CHANNEL:		return 4;

	case PCM_REAR_CHANNEL:		return 0;

	case PCM_CENTER_LFE_CHANNEL:	return 2;

	case PCM_UNKNOWN_CHANNEL:	return 1;

	}

	snd_printk(KERN_DEBUG "ca0106: unknown channel_id %d\n", channel_id);

	return 0;

}



static int snd_ca0106_pcm_power_dac(struct snd_ca0106 *chip, int channel_id,

				    int power)

{

	if (chip->details->spi_dac) {

		const int reg = spi_dacd_reg[channel_id];

		const int dac = snd_ca0106_channel_dac(chip->details,

						       channel_id);

		const int reg = spi_dacd_reg[dac];

		const int bit = spi_dacd_bit[dac];



		if (power)

			/* Power up */

			chip->spi_dac_reg[reg] &= ~spi_dacd_bit[channel_id];

			chip->spi_dac_reg[reg] &= ~bit;

		else

			/* Power down */

			chip->spi_dac_reg[reg] |= spi_dacd_bit[channel_id];

			chip->spi_dac_reg[reg] |= bit;

		return snd_ca0106_spi_write(chip, chip->spi_dac_reg[reg]);

	}

	return 0;