1. 根目录:
2. sound
3. pci
4. oxygen
5. cs4245.h

#define CS4245_CHIP_ID		0x01
#define CS4245_POWER_CTRL	0x02
#define CS4245_DAC_CTRL_1	0x03
#define CS4245_ADC_CTRL		0x04
#define CS4245_MCLK_FREQ	0x05
#define CS4245_SIGNAL_SEL	0x06
#define CS4245_PGA_B_CTRL	0x07
#define CS4245_PGA_A_CTRL	0x08
#define CS4245_ANALOG_IN	0x09
#define CS4245_DAC_A_CTRL	0x0a
#define CS4245_DAC_B_CTRL	0x0b
#define CS4245_DAC_CTRL_2	0x0c
#define CS4245_INT_STATUS	0x0d
#define CS4245_INT_MASK		0x0e
#define CS4245_INT_MODE_MSB	0x0f
#define CS4245_INT_MODE_LSB	0x10

/* Chip ID */
#define CS4245_CHIP_PART_MASK	0xf0
#define CS4245_CHIP_REV_MASK	0x0f

/* Power Control */
#define CS4245_FREEZE		0x80
#define CS4245_PDN_MIC		0x08
#define CS4245_PDN_ADC		0x04
#define CS4245_PDN_DAC		0x02
#define CS4245_PDN		0x01

/* DAC Control */
#define CS4245_DAC_FM_MASK	0xc0
#define CS4245_DAC_FM_SINGLE	0x00
#define CS4245_DAC_FM_DOUBLE	0x40
#define CS4245_DAC_FM_QUAD	0x80
#define CS4245_DAC_DIF_MASK	0x30
#define CS4245_DAC_DIF_LJUST	0x00
#define CS4245_DAC_DIF_I2S	0x10
#define CS4245_DAC_DIF_RJUST_16	0x20
#define CS4245_DAC_DIF_RJUST_24	0x30
#define CS4245_RESERVED_1	0x08
#define CS4245_MUTE_DAC		0x04
#define CS4245_DEEMPH		0x02
#define CS4245_DAC_MASTER	0x01

/* ADC Control */
#define CS4245_ADC_FM_MASK	0xc0
#define CS4245_ADC_FM_SINGLE	0x00
#define CS4245_ADC_FM_DOUBLE	0x40
#define CS4245_ADC_FM_QUAD	0x80
#define CS4245_ADC_DIF_MASK	0x10
#define CS4245_ADC_DIF_LJUST	0x00
#define CS4245_ADC_DIF_I2S	0x10
#define CS4245_MUTE_ADC		0x04
#define CS4245_HPF_FREEZE	0x02
#define CS4245_ADC_MASTER	0x01

/* MCLK Frequency */
#define CS4245_MCLK1_MASK	0x70
#define CS4245_MCLK1_SHIFT	4
#define CS4245_MCLK2_MASK	0x07
#define CS4245_MCLK2_SHIFT	0
#define CS4245_MCLK_1		0
#define CS4245_MCLK_1_5		1
#define CS4245_MCLK_2		2
#define CS4245_MCLK_3		3
#define CS4245_MCLK_4		4

/* Signal Selection */
#define CS4245_A_OUT_SEL_MASK	0x60
#define CS4245_A_OUT_SEL_HIZ	0x00
#define CS4245_A_OUT_SEL_DAC	0x20
#define CS4245_A_OUT_SEL_PGA	0x40
#define CS4245_LOOP		0x02
#define CS4245_ASYNCH		0x01

/* Channel B/A PGA Control */
#define CS4245_PGA_GAIN_MASK	0x3f

/* ADC Input Control */
#define CS4245_PGA_SOFT		0x10
#define CS4245_PGA_ZERO		0x08
#define CS4245_SEL_MASK		0x07
#define CS4245_SEL_MIC		0x00
#define CS4245_SEL_INPUT_1	0x01
#define CS4245_SEL_INPUT_2	0x02
#define CS4245_SEL_INPUT_3	0x03
#define CS4245_SEL_INPUT_4	0x04
#define CS4245_SEL_INPUT_5	0x05
#define CS4245_SEL_INPUT_6	0x06

/* DAC Channel A/B Volume Control */
#define CS4245_VOL_MASK		0xff

/* DAC Control 2 */
#define CS4245_DAC_SOFT		0x80
#define CS4245_DAC_ZERO		0x40
#define CS4245_INVERT_DAC	0x20
#define CS4245_INT_ACTIVE_HIGH	0x01

/* Interrupt Status/Mask/Mode */
#define CS4245_ADC_CLK_ERR	0x08
#define CS4245_DAC_CLK_ERR	0x04
#define CS4245_ADC_OVFL		0x02
#define CS4245_ADC_UNDRFL	0x01


#define CS4245_SPI_ADDRESS	(0x9e << 16)
#define CS4245_SPI_WRITE	(0 << 16)