drivers/media/video/em28xx/em28xx-reg.h - kernel/prism - Git at Google

 #define EM_GPIO_0  (1 << 0)
 #define EM_GPIO_1  (1 << 1)
 #define EM_GPIO_2  (1 << 2)
 #define EM_GPIO_3  (1 << 3)
 #define EM_GPIO_4  (1 << 4)
 #define EM_GPIO_5  (1 << 5)
 #define EM_GPIO_6  (1 << 6)
 #define EM_GPIO_7  (1 << 7)

 #define EM_GPO_0   (1 << 0)
 #define EM_GPO_1   (1 << 1)
 #define EM_GPO_2   (1 << 2)
 #define EM_GPO_3   (1 << 3)

 /* em2800 registers */
 #define EM2800_R08_AUDIOSRC 0x08

 /* em28xx registers */

 #define EM28XX_R00_CHIPCFG	0x00

 /* em28xx Chip Configuration 0x00 */
 #define EM28XX_CHIPCFG_VENDOR_AUDIO		0x80
 #define EM28XX_CHIPCFG_I2S_VOLUME_CAPABLE	0x40
 #define EM28XX_CHIPCFG_I2S_5_SAMPRATES		0x30
 #define EM28XX_CHIPCFG_I2S_3_SAMPRATES		0x20
 #define EM28XX_CHIPCFG_AC97			0x10
 #define EM28XX_CHIPCFG_AUDIOMASK		0x30

 #define EM28XX_R01_CHIPCFG2	0x01

 /* em28xx Chip Configuration 2 0x01 */
 #define EM28XX_CHIPCFG2_TS_PRESENT		0x10
 #define EM28XX_CHIPCFG2_TS_REQ_INTERVAL_MASK	0x0c /* bits 3-2 */
 #define EM28XX_CHIPCFG2_TS_REQ_INTERVAL_1MF	0x00
 #define EM28XX_CHIPCFG2_TS_REQ_INTERVAL_2MF	0x04
 #define EM28XX_CHIPCFG2_TS_REQ_INTERVAL_4MF	0x08
 #define EM28XX_CHIPCFG2_TS_REQ_INTERVAL_8MF	0x0c
 #define EM28XX_CHIPCFG2_TS_PACKETSIZE_MASK	0x03 /* bits 0-1 */
 #define EM28XX_CHIPCFG2_TS_PACKETSIZE_188	0x00
 #define EM28XX_CHIPCFG2_TS_PACKETSIZE_376	0x01
 #define EM28XX_CHIPCFG2_TS_PACKETSIZE_564	0x02
 #define EM28XX_CHIPCFG2_TS_PACKETSIZE_752	0x03


 	/* GPIO/GPO registers */
 #define EM2880_R04_GPO	0x04    /* em2880-em2883 only */
 #define EM28XX_R08_GPIO	0x08	/* em2820 or upper */

 #define EM28XX_R06_I2C_CLK	0x06

 /* em28xx I2C Clock Register (0x06) */
 #define EM28XX_I2C_CLK_ACK_LAST_READ	0x80
 #define EM28XX_I2C_CLK_WAIT_ENABLE	0x40
 #define EM28XX_I2C_EEPROM_ON_BOARD	0x08
 #define EM28XX_I2C_EEPROM_KEY_VALID	0x04
 #define EM2874_I2C_SECONDARY_BUS_SELECT	0x04 /* em2874 has two i2c busses */
 #define EM28XX_I2C_FREQ_1_5_MHZ		0x03 /* bus frequency (bits [1-0]) */
 #define EM28XX_I2C_FREQ_25_KHZ		0x02
 #define EM28XX_I2C_FREQ_400_KHZ		0x01
 #define EM28XX_I2C_FREQ_100_KHZ		0x00


 #define EM28XX_R0A_CHIPID	0x0a
 #define EM28XX_R0C_USBSUSP	0x0c	/* */

 #define EM28XX_R0E_AUDIOSRC	0x0e
 #define EM28XX_R0F_XCLK	0x0f

 /* em28xx XCLK Register (0x0f) */
 #define EM28XX_XCLK_AUDIO_UNMUTE	0x80 /* otherwise audio muted */
 #define EM28XX_XCLK_I2S_MSB_TIMING	0x40 /* otherwise standard timing */
 #define EM28XX_XCLK_IR_RC5_MODE		0x20 /* otherwise NEC mode */
 #define EM28XX_XCLK_IR_NEC_CHK_PARITY	0x10
 #define EM28XX_XCLK_FREQUENCY_30MHZ	0x00 /* Freq. select (bits [3-0]) */
 #define EM28XX_XCLK_FREQUENCY_15MHZ	0x01
 #define EM28XX_XCLK_FREQUENCY_10MHZ	0x02
 #define EM28XX_XCLK_FREQUENCY_7_5MHZ	0x03
 #define EM28XX_XCLK_FREQUENCY_6MHZ	0x04
 #define EM28XX_XCLK_FREQUENCY_5MHZ	0x05
 #define EM28XX_XCLK_FREQUENCY_4_3MHZ	0x06
 #define EM28XX_XCLK_FREQUENCY_12MHZ	0x07
 #define EM28XX_XCLK_FREQUENCY_20MHZ	0x08
 #define EM28XX_XCLK_FREQUENCY_20MHZ_2	0x09
 #define EM28XX_XCLK_FREQUENCY_48MHZ	0x0a
 #define EM28XX_XCLK_FREQUENCY_24MHZ	0x0b

 #define EM28XX_R10_VINMODE	0x10

 #define EM28XX_R11_VINCTRL	0x11

 /* em28xx Video Input Control Register 0x11 */
 #define EM28XX_VINCTRL_VBI_SLICED	0x80
 #define EM28XX_VINCTRL_VBI_RAW		0x40
 #define EM28XX_VINCTRL_VOUT_MODE_IN	0x20 /* HREF,VREF,VACT in output */
 #define EM28XX_VINCTRL_CCIR656_ENABLE	0x10
 #define EM28XX_VINCTRL_VBI_16BIT_RAW	0x08 /* otherwise 8-bit raw */
 #define EM28XX_VINCTRL_FID_ON_HREF	0x04
 #define EM28XX_VINCTRL_DUAL_EDGE_STROBE	0x02
 #define EM28XX_VINCTRL_INTERLACED	0x01

 #define EM28XX_R12_VINENABLE	0x12	/* */

 #define EM28XX_R14_GAMMA	0x14
 #define EM28XX_R15_RGAIN	0x15
 #define EM28XX_R16_GGAIN	0x16
 #define EM28XX_R17_BGAIN	0x17
 #define EM28XX_R18_ROFFSET	0x18
 #define EM28XX_R19_GOFFSET	0x19
 #define EM28XX_R1A_BOFFSET	0x1a

 #define EM28XX_R1B_OFLOW	0x1b
 #define EM28XX_R1C_HSTART	0x1c
 #define EM28XX_R1D_VSTART	0x1d
 #define EM28XX_R1E_CWIDTH	0x1e
 #define EM28XX_R1F_CHEIGHT	0x1f

 #define EM28XX_R20_YGAIN	0x20
 #define EM28XX_R21_YOFFSET	0x21
 #define EM28XX_R22_UVGAIN	0x22
 #define EM28XX_R23_UOFFSET	0x23
 #define EM28XX_R24_VOFFSET	0x24
 #define EM28XX_R25_SHARPNESS	0x25

 #define EM28XX_R26_COMPR	0x26
 #define EM28XX_R27_OUTFMT	0x27

 /* em28xx Output Format Register (0x27) */
 #define EM28XX_OUTFMT_RGB_8_RGRG	0x00
 #define EM28XX_OUTFMT_RGB_8_GRGR	0x01
 #define EM28XX_OUTFMT_RGB_8_GBGB	0x02
 #define EM28XX_OUTFMT_RGB_8_BGBG	0x03
 #define EM28XX_OUTFMT_RGB_16_656	0x04
 #define EM28XX_OUTFMT_RGB_8_BAYER	0x08 /* Pattern in Reg 0x10[1-0] */
 #define EM28XX_OUTFMT_YUV211		0x10
 #define EM28XX_OUTFMT_YUV422_Y0UY1V	0x14
 #define EM28XX_OUTFMT_YUV422_Y1UY0V	0x15
 #define EM28XX_OUTFMT_YUV411		0x18


 #define EM28XX_R28_XMIN	0x28
 #define EM28XX_R29_XMAX	0x29
 #define EM28XX_R2A_YMIN	0x2a
 #define EM28XX_R2B_YMAX	0x2b

 #define EM28XX_R30_HSCALELOW	0x30
 #define EM28XX_R31_HSCALEHIGH	0x31
 #define EM28XX_R32_VSCALELOW	0x32
 #define EM28XX_R33_VSCALEHIGH	0x33
 #define EM28XX_R34_VBI_START_H	0x34
 #define EM28XX_R35_VBI_START_V	0x35
 #define EM28XX_R36_VBI_WIDTH	0x36
 #define EM28XX_R37_VBI_HEIGHT	0x37

 #define EM28XX_R40_AC97LSB	0x40
 #define EM28XX_R41_AC97MSB	0x41
 #define EM28XX_R42_AC97ADDR	0x42
 #define EM28XX_R43_AC97BUSY	0x43

 #define EM28XX_R45_IR		0x45
 	/* 0x45  bit 7    - parity bit
 		 bits 6-0 - count
 	   0x46  IR brand
 	   0x47  IR data
 	 */

 /* em2874 registers */
 #define EM2874_R50_IR_CONFIG    0x50
 #define EM2874_R51_IR           0x51
 #define EM2874_R5F_TS_ENABLE    0x5f
 #define EM2874_R80_GPIO         0x80

 /* em2874 IR config register (0x50) */
 #define EM2874_IR_NEC           0x00
 #define EM2874_IR_RC5           0x04
 #define EM2874_IR_RC5_MODE_0    0x08
 #define EM2874_IR_RC5_MODE_6A   0x0b

 /* em2874 Transport Stream Enable Register (0x5f) */
 #define EM2874_TS1_CAPTURE_ENABLE (1 << 0)
 #define EM2874_TS1_FILTER_ENABLE  (1 << 1)
 #define EM2874_TS1_NULL_DISCARD   (1 << 2)
 #define EM2874_TS2_CAPTURE_ENABLE (1 << 4)
 #define EM2874_TS2_FILTER_ENABLE  (1 << 5)
 #define EM2874_TS2_NULL_DISCARD   (1 << 6)

 /* register settings */
 #define EM2800_AUDIO_SRC_TUNER  0x0d
 #define EM2800_AUDIO_SRC_LINE   0x0c
 #define EM28XX_AUDIO_SRC_TUNER	0xc0
 #define EM28XX_AUDIO_SRC_LINE	0x80

 /* FIXME: Need to be populated with the other chip ID's */
 enum em28xx_chip_id {
 	CHIP_ID_EM2710 = 17,
 	CHIP_ID_EM2820 = 18,	/* Also used by some em2710 */
 	CHIP_ID_EM2840 = 20,
 	CHIP_ID_EM2750 = 33,
 	CHIP_ID_EM2860 = 34,
 	CHIP_ID_EM2870 = 35,
 	CHIP_ID_EM2883 = 36,
 	CHIP_ID_EM2874 = 65,
 };

 /*
  * Registers used by em202 and other AC97 chips
  */

 /* Standard AC97 registers */
 #define AC97_RESET               0x00

 	/* Output volumes */
 #define AC97_MASTER_VOL          0x02
 #define AC97_LINE_LEVEL_VOL      0x04	/* Some devices use for headphones */
 #define AC97_MASTER_MONO_VOL     0x06

 	/* Input volumes */
 #define AC97_PC_BEEP_VOL         0x0a
 #define AC97_PHONE_VOL           0x0c
 #define AC97_MIC_VOL             0x0e
 #define AC97_LINEIN_VOL          0x10
 #define AC97_CD_VOL              0x12
 #define AC97_VIDEO_VOL           0x14
 #define AC97_AUX_VOL             0x16
 #define AC97_PCM_OUT_VOL         0x18

 	/* capture registers */
 #define AC97_RECORD_SELECT       0x1a
 #define AC97_RECORD_GAIN         0x1c

 	/* control registers */
 #define AC97_GENERAL_PURPOSE     0x20
 #define AC97_3D_CTRL             0x22
 #define AC97_AUD_INT_AND_PAG     0x24
 #define AC97_POWER_DOWN_CTRL     0x26
 #define AC97_EXT_AUD_ID          0x28
 #define AC97_EXT_AUD_CTRL        0x2a

 /* Supported rate varies for each AC97 device
    if write an unsupported value, it will return the closest one
  */
 #define AC97_PCM_OUT_FRONT_SRATE 0x2c
 #define AC97_PCM_OUT_SURR_SRATE  0x2e
 #define AC97_PCM_OUT_LFE_SRATE   0x30
 #define AC97_PCM_IN_SRATE        0x32

 	/* For devices with more than 2 channels, extra output volumes */
 #define AC97_LFE_MASTER_VOL      0x36
 #define AC97_SURR_MASTER_VOL     0x38

 	/* Digital SPDIF output control */
 #define AC97_SPDIF_OUT_CTRL      0x3a

 	/* Vendor ID identifier */
 #define AC97_VENDOR_ID1          0x7c
 #define AC97_VENDOR_ID2          0x7e

 /* EMP202 vendor registers */
 #define EM202_EXT_MODEM_CTRL     0x3e
 #define EM202_GPIO_CONF          0x4c
 #define EM202_GPIO_POLARITY      0x4e
 #define EM202_GPIO_STICKY        0x50
 #define EM202_GPIO_MASK          0x52
 #define EM202_GPIO_STATUS        0x54
 #define EM202_SPDIF_OUT_SEL      0x6a
 #define EM202_ANTIPOP            0x72
 #define EM202_EAPD_GPIO_ACCESS   0x74
	#define EM_GPIO_0 (1 << 0)
	#define EM_GPIO_1 (1 << 1)
	#define EM_GPIO_2 (1 << 2)
	#define EM_GPIO_3 (1 << 3)
	#define EM_GPIO_4 (1 << 4)
	#define EM_GPIO_5 (1 << 5)
	#define EM_GPIO_6 (1 << 6)
	#define EM_GPIO_7 (1 << 7)

	#define EM_GPO_0 (1 << 0)
	#define EM_GPO_1 (1 << 1)
	#define EM_GPO_2 (1 << 2)
	#define EM_GPO_3 (1 << 3)

	/* em2800 registers */
	#define EM2800_R08_AUDIOSRC 0x08

	/* em28xx registers */

	#define EM28XX_R00_CHIPCFG 0x00

	/* em28xx Chip Configuration 0x00 */
	#define EM28XX_CHIPCFG_VENDOR_AUDIO 0x80
	#define EM28XX_CHIPCFG_I2S_VOLUME_CAPABLE 0x40
	#define EM28XX_CHIPCFG_I2S_5_SAMPRATES 0x30
	#define EM28XX_CHIPCFG_I2S_3_SAMPRATES 0x20
	#define EM28XX_CHIPCFG_AC97 0x10
	#define EM28XX_CHIPCFG_AUDIOMASK 0x30

	#define EM28XX_R01_CHIPCFG2 0x01

	/* em28xx Chip Configuration 2 0x01 */
	#define EM28XX_CHIPCFG2_TS_PRESENT 0x10
	#define EM28XX_CHIPCFG2_TS_REQ_INTERVAL_MASK 0x0c /* bits 3-2 */
	#define EM28XX_CHIPCFG2_TS_REQ_INTERVAL_1MF 0x00
	#define EM28XX_CHIPCFG2_TS_REQ_INTERVAL_2MF 0x04
	#define EM28XX_CHIPCFG2_TS_REQ_INTERVAL_4MF 0x08
	#define EM28XX_CHIPCFG2_TS_REQ_INTERVAL_8MF 0x0c
	#define EM28XX_CHIPCFG2_TS_PACKETSIZE_MASK 0x03 /* bits 0-1 */
	#define EM28XX_CHIPCFG2_TS_PACKETSIZE_188 0x00
	#define EM28XX_CHIPCFG2_TS_PACKETSIZE_376 0x01
	#define EM28XX_CHIPCFG2_TS_PACKETSIZE_564 0x02
	#define EM28XX_CHIPCFG2_TS_PACKETSIZE_752 0x03


	/* GPIO/GPO registers */
	#define EM2880_R04_GPO 0x04 /* em2880-em2883 only */
	#define EM28XX_R08_GPIO 0x08 /* em2820 or upper */

	#define EM28XX_R06_I2C_CLK 0x06

	/* em28xx I2C Clock Register (0x06) */
	#define EM28XX_I2C_CLK_ACK_LAST_READ 0x80
	#define EM28XX_I2C_CLK_WAIT_ENABLE 0x40
	#define EM28XX_I2C_EEPROM_ON_BOARD 0x08
	#define EM28XX_I2C_EEPROM_KEY_VALID 0x04
	#define EM2874_I2C_SECONDARY_BUS_SELECT 0x04 /* em2874 has two i2c busses */
	#define EM28XX_I2C_FREQ_1_5_MHZ 0x03 /* bus frequency (bits [1-0]) */
	#define EM28XX_I2C_FREQ_25_KHZ 0x02
	#define EM28XX_I2C_FREQ_400_KHZ 0x01
	#define EM28XX_I2C_FREQ_100_KHZ 0x00


	#define EM28XX_R0A_CHIPID 0x0a
	#define EM28XX_R0C_USBSUSP 0x0c /* */

	#define EM28XX_R0E_AUDIOSRC 0x0e
	#define EM28XX_R0F_XCLK 0x0f

	/* em28xx XCLK Register (0x0f) */
	#define EM28XX_XCLK_AUDIO_UNMUTE 0x80 /* otherwise audio muted */
	#define EM28XX_XCLK_I2S_MSB_TIMING 0x40 /* otherwise standard timing */
	#define EM28XX_XCLK_IR_RC5_MODE 0x20 /* otherwise NEC mode */
	#define EM28XX_XCLK_IR_NEC_CHK_PARITY 0x10
	#define EM28XX_XCLK_FREQUENCY_30MHZ 0x00 /* Freq. select (bits [3-0]) */
	#define EM28XX_XCLK_FREQUENCY_15MHZ 0x01
	#define EM28XX_XCLK_FREQUENCY_10MHZ 0x02
	#define EM28XX_XCLK_FREQUENCY_7_5MHZ 0x03
	#define EM28XX_XCLK_FREQUENCY_6MHZ 0x04
	#define EM28XX_XCLK_FREQUENCY_5MHZ 0x05
	#define EM28XX_XCLK_FREQUENCY_4_3MHZ 0x06
	#define EM28XX_XCLK_FREQUENCY_12MHZ 0x07
	#define EM28XX_XCLK_FREQUENCY_20MHZ 0x08
	#define EM28XX_XCLK_FREQUENCY_20MHZ_2 0x09
	#define EM28XX_XCLK_FREQUENCY_48MHZ 0x0a
	#define EM28XX_XCLK_FREQUENCY_24MHZ 0x0b

	#define EM28XX_R10_VINMODE 0x10

	#define EM28XX_R11_VINCTRL 0x11

	/* em28xx Video Input Control Register 0x11 */
	#define EM28XX_VINCTRL_VBI_SLICED 0x80
	#define EM28XX_VINCTRL_VBI_RAW 0x40
	#define EM28XX_VINCTRL_VOUT_MODE_IN 0x20 /* HREF,VREF,VACT in output */
	#define EM28XX_VINCTRL_CCIR656_ENABLE 0x10
	#define EM28XX_VINCTRL_VBI_16BIT_RAW 0x08 /* otherwise 8-bit raw */
	#define EM28XX_VINCTRL_FID_ON_HREF 0x04
	#define EM28XX_VINCTRL_DUAL_EDGE_STROBE 0x02
	#define EM28XX_VINCTRL_INTERLACED 0x01

	#define EM28XX_R12_VINENABLE 0x12 /* */

	#define EM28XX_R14_GAMMA 0x14
	#define EM28XX_R15_RGAIN 0x15
	#define EM28XX_R16_GGAIN 0x16
	#define EM28XX_R17_BGAIN 0x17
	#define EM28XX_R18_ROFFSET 0x18
	#define EM28XX_R19_GOFFSET 0x19
	#define EM28XX_R1A_BOFFSET 0x1a

	#define EM28XX_R1B_OFLOW 0x1b
	#define EM28XX_R1C_HSTART 0x1c
	#define EM28XX_R1D_VSTART 0x1d
	#define EM28XX_R1E_CWIDTH 0x1e
	#define EM28XX_R1F_CHEIGHT 0x1f

	#define EM28XX_R20_YGAIN 0x20
	#define EM28XX_R21_YOFFSET 0x21
	#define EM28XX_R22_UVGAIN 0x22
	#define EM28XX_R23_UOFFSET 0x23
	#define EM28XX_R24_VOFFSET 0x24
	#define EM28XX_R25_SHARPNESS 0x25

	#define EM28XX_R26_COMPR 0x26
	#define EM28XX_R27_OUTFMT 0x27

	/* em28xx Output Format Register (0x27) */
	#define EM28XX_OUTFMT_RGB_8_RGRG 0x00
	#define EM28XX_OUTFMT_RGB_8_GRGR 0x01
	#define EM28XX_OUTFMT_RGB_8_GBGB 0x02
	#define EM28XX_OUTFMT_RGB_8_BGBG 0x03
	#define EM28XX_OUTFMT_RGB_16_656 0x04
	#define EM28XX_OUTFMT_RGB_8_BAYER 0x08 /* Pattern in Reg 0x10[1-0] */
	#define EM28XX_OUTFMT_YUV211 0x10
	#define EM28XX_OUTFMT_YUV422_Y0UY1V 0x14
	#define EM28XX_OUTFMT_YUV422_Y1UY0V 0x15
	#define EM28XX_OUTFMT_YUV411 0x18


	#define EM28XX_R28_XMIN 0x28
	#define EM28XX_R29_XMAX 0x29
	#define EM28XX_R2A_YMIN 0x2a
	#define EM28XX_R2B_YMAX 0x2b

	#define EM28XX_R30_HSCALELOW 0x30
	#define EM28XX_R31_HSCALEHIGH 0x31
	#define EM28XX_R32_VSCALELOW 0x32
	#define EM28XX_R33_VSCALEHIGH 0x33
	#define EM28XX_R34_VBI_START_H 0x34
	#define EM28XX_R35_VBI_START_V 0x35
	#define EM28XX_R36_VBI_WIDTH 0x36
	#define EM28XX_R37_VBI_HEIGHT 0x37

	#define EM28XX_R40_AC97LSB 0x40
	#define EM28XX_R41_AC97MSB 0x41
	#define EM28XX_R42_AC97ADDR 0x42
	#define EM28XX_R43_AC97BUSY 0x43

	#define EM28XX_R45_IR 0x45
	/* 0x45 bit 7 - parity bit
	bits 6-0 - count
	0x46 IR brand
	0x47 IR data
	*/

	/* em2874 registers */
	#define EM2874_R50_IR_CONFIG 0x50
	#define EM2874_R51_IR 0x51
	#define EM2874_R5F_TS_ENABLE 0x5f
	#define EM2874_R80_GPIO 0x80

	/* em2874 IR config register (0x50) */
	#define EM2874_IR_NEC 0x00
	#define EM2874_IR_RC5 0x04
	#define EM2874_IR_RC5_MODE_0 0x08
	#define EM2874_IR_RC5_MODE_6A 0x0b

	/* em2874 Transport Stream Enable Register (0x5f) */
	#define EM2874_TS1_CAPTURE_ENABLE (1 << 0)
	#define EM2874_TS1_FILTER_ENABLE (1 << 1)
	#define EM2874_TS1_NULL_DISCARD (1 << 2)
	#define EM2874_TS2_CAPTURE_ENABLE (1 << 4)
	#define EM2874_TS2_FILTER_ENABLE (1 << 5)
	#define EM2874_TS2_NULL_DISCARD (1 << 6)

	/* register settings */
	#define EM2800_AUDIO_SRC_TUNER 0x0d
	#define EM2800_AUDIO_SRC_LINE 0x0c
	#define EM28XX_AUDIO_SRC_TUNER 0xc0
	#define EM28XX_AUDIO_SRC_LINE 0x80

	/* FIXME: Need to be populated with the other chip ID's */
	enum em28xx_chip_id {
	CHIP_ID_EM2710 = 17,
	CHIP_ID_EM2820 = 18, /* Also used by some em2710 */
	CHIP_ID_EM2840 = 20,
	CHIP_ID_EM2750 = 33,
	CHIP_ID_EM2860 = 34,
	CHIP_ID_EM2870 = 35,
	CHIP_ID_EM2883 = 36,
	CHIP_ID_EM2874 = 65,
	};

	/*
	* Registers used by em202 and other AC97 chips
	*/

	/* Standard AC97 registers */
	#define AC97_RESET 0x00

	/* Output volumes */
	#define AC97_MASTER_VOL 0x02
	#define AC97_LINE_LEVEL_VOL 0x04 /* Some devices use for headphones */
	#define AC97_MASTER_MONO_VOL 0x06

	/* Input volumes */
	#define AC97_PC_BEEP_VOL 0x0a
	#define AC97_PHONE_VOL 0x0c
	#define AC97_MIC_VOL 0x0e
	#define AC97_LINEIN_VOL 0x10
	#define AC97_CD_VOL 0x12
	#define AC97_VIDEO_VOL 0x14
	#define AC97_AUX_VOL 0x16
	#define AC97_PCM_OUT_VOL 0x18

	/* capture registers */
	#define AC97_RECORD_SELECT 0x1a
	#define AC97_RECORD_GAIN 0x1c

	/* control registers */
	#define AC97_GENERAL_PURPOSE 0x20
	#define AC97_3D_CTRL 0x22
	#define AC97_AUD_INT_AND_PAG 0x24
	#define AC97_POWER_DOWN_CTRL 0x26
	#define AC97_EXT_AUD_ID 0x28
	#define AC97_EXT_AUD_CTRL 0x2a

	/* Supported rate varies for each AC97 device
	if write an unsupported value, it will return the closest one
	*/
	#define AC97_PCM_OUT_FRONT_SRATE 0x2c
	#define AC97_PCM_OUT_SURR_SRATE 0x2e
	#define AC97_PCM_OUT_LFE_SRATE 0x30
	#define AC97_PCM_IN_SRATE 0x32

	/* For devices with more than 2 channels, extra output volumes */
	#define AC97_LFE_MASTER_VOL 0x36
	#define AC97_SURR_MASTER_VOL 0x38

	/* Digital SPDIF output control */
	#define AC97_SPDIF_OUT_CTRL 0x3a

	/* Vendor ID identifier */
	#define AC97_VENDOR_ID1 0x7c
	#define AC97_VENDOR_ID2 0x7e

	/* EMP202 vendor registers */
	#define EM202_EXT_MODEM_CTRL 0x3e
	#define EM202_GPIO_CONF 0x4c
	#define EM202_GPIO_POLARITY 0x4e
	#define EM202_GPIO_STICKY 0x50
	#define EM202_GPIO_MASK 0x52
	#define EM202_GPIO_STATUS 0x54
	#define EM202_SPDIF_OUT_SEL 0x6a
	#define EM202_ANTIPOP 0x72
	#define EM202_EAPD_GPIO_ACCESS 0x74