drivers/media/usb/em28xx/em28xx-reg.h - linux - Git at Google

 /* SPDX-License-Identifier: GPL-2.0 */

 /*
  * em28xx-reg.h - Register definitions for em28xx driver
  */

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

 #define EM_GPO_0   ((unsigned char)BIT(0))
 #define EM_GPO_1   ((unsigned char)BIT(1))
 #define EM_GPO_2   ((unsigned char)BIT(2))
 #define EM_GPO_3   ((unsigned char)BIT(3))

 /* em28xx endpoints */
 /* 0x82:   (always ?) analog */
 #define EM28XX_EP_AUDIO		0x83
 /* 0x84:   digital or analog */

 /* em2800 registers */
 #define EM2800_R08_AUDIOSRC 0x08

 /* em28xx registers */

 #define EM28XX_R00_CHIPCFG	0x00

 /* em28xx Chip Configuration 0x00 */
 #define EM2860_CHIPCFG_VENDOR_AUDIO		0x80
 #define EM2860_CHIPCFG_I2S_VOLUME_CAPABLE	0x40
 #define EM2820_CHIPCFG_I2S_3_SAMPRATES		0x30
 #define EM2860_CHIPCFG_I2S_5_SAMPRATES		0x30
 #define EM2820_CHIPCFG_I2S_1_SAMPRATE		0x20
 #define EM2860_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 EM2820_R08_GPIO_CTRL	0x08	/* em2820-em2873/83 only */
 #define EM2820_R09_GPIO_STATE	0x09	/* em2820-em2873/83 only */

 #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_R0C_USBSUSP_SNAPSHOT	0x20 /* 1=button pressed, needs reset */

 #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
 	  /* used by all non-camera devices: */
 #define   EM28XX_VINMODE_YUV422_CbYCrY  0x10
 	  /* used by camera devices: */
 #define   EM28XX_VINMODE_YUV422_YUYV    0x08
 #define   EM28XX_VINMODE_YUV422_YVYU    0x09
 #define   EM28XX_VINMODE_YUV422_UYVY    0x0a
 #define   EM28XX_VINMODE_YUV422_VYUY    0x0b
 #define   EM28XX_VINMODE_RGB8_BGGR      0x0c
 #define   EM28XX_VINMODE_RGB8_GRBG      0x0d
 #define   EM28XX_VINMODE_RGB8_GBRG      0x0e
 #define   EM28XX_VINMODE_RGB8_RGGB      0x0f
 	  /*
 	   * apparently:
 	   *   bit 0: swap component 1+2 with 3+4
 	   *                 => e.g.: YUYV => YVYU, BGGR => GRBG
 	   *   bit 1: swap component 1 with 2 and 3 with 4
 	   *                 => e.g.: YUYV => UYVY, BGGR => GBRG
 	   */

 #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 /* contrast [0:4]   */
 #define   CONTRAST_DEFAULT	0x10

 #define EM28XX_R21_YOFFSET	0x21 /* brightness       */	/* signed */
 #define   BRIGHTNESS_DEFAULT	0x00

 #define EM28XX_R22_UVGAIN	0x22 /* saturation [0:4] */
 #define   SATURATION_DEFAULT	0x10

 #define EM28XX_R23_UOFFSET	0x23 /* blue balance     */	/* signed */
 #define   BLUE_BALANCE_DEFAULT	0x00

 #define EM28XX_R24_VOFFSET	0x24 /* red balance      */	/* signed */
 #define   RED_BALANCE_DEFAULT	0x00

 #define EM28XX_R25_SHARPNESS	0x25 /* sharpness [0:4]  */
 #define   SHARPNESS_DEFAULT	0x00

 #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_HVSCALE_MAX	0x3fff /* => 20% */

 #define EM28XX_R34_VBI_START_H	0x34
 #define EM28XX_R35_VBI_START_V	0x35
 /*
  * NOTE: the EM276x (and EM25xx, EM277x/8x ?) (camera bridges) use these
  * registers for a different unknown purpose.
  *   => register 0x34 is set to capture width / 16
  *   => register 0x35 is set to capture height / 16
  */

 #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_R5D_TS1_PKT_SIZE 0x5d
 #define EM2874_R5E_TS2_PKT_SIZE 0x5e
 	/*
 	 * For both TS1 and TS2, In isochronous mode:
 	 *  0x01  188 bytes
 	 *  0x02  376 bytes
 	 *  0x03  564 bytes
 	 *  0x04  752 bytes
 	 *  0x05  940 bytes
 	 * In bulk mode:
 	 *  0x01..0xff  total packet count in 188-byte
 	 */

 #define EM2874_R5F_TS_ENABLE    0x5f

 /* em2874/174/84, em25xx, em276x/7x/8x GPIO registers */
 /*
  * NOTE: not all ports are bonded out;
  * Some ports are multiplexed with special function I/O
  */
 #define EM2874_R80_GPIO_P0_CTRL    0x80
 #define EM2874_R81_GPIO_P1_CTRL    0x81
 #define EM2874_R82_GPIO_P2_CTRL    0x82
 #define EM2874_R83_GPIO_P3_CTRL    0x83
 #define EM2874_R84_GPIO_P0_STATE   0x84
 #define EM2874_R85_GPIO_P1_STATE   0x85
 #define EM2874_R86_GPIO_P2_STATE   0x86
 #define EM2874_R87_GPIO_P3_STATE   0x87

 /* em2874 IR config register (0x50) */
 #define EM2874_IR_NEC           0x00
 #define EM2874_IR_NEC_NO_PARITY 0x01
 #define EM2874_IR_RC5           0x04
 #define EM2874_IR_RC6_MODE_0    0x08
 #define EM2874_IR_RC6_MODE_6A   0x0b

 /* em2874 Transport Stream Enable Register (0x5f) */
 #define EM2874_TS1_CAPTURE_ENABLE ((unsigned char)BIT(0))
 #define EM2874_TS1_FILTER_ENABLE  ((unsigned char)BIT(1))
 #define EM2874_TS1_NULL_DISCARD   ((unsigned char)BIT(2))
 #define EM2874_TS2_CAPTURE_ENABLE ((unsigned char)BIT(4))
 #define EM2874_TS2_FILTER_ENABLE  ((unsigned char)BIT(5))
 #define EM2874_TS2_NULL_DISCARD   ((unsigned char)BIT(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_EM2800 = 7,
 	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_EM2765 = 54,
 	CHIP_ID_EM2874 = 65,
 	CHIP_ID_EM2884 = 68,
 	CHIP_ID_EM28174 = 113,
 	CHIP_ID_EM28178 = 114,
 };

 /*
  * Registers used by em202
  */

 /* 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
	/* SPDX-License-Identifier: GPL-2.0 */

	/*
	* em28xx-reg.h - Register definitions for em28xx driver
	*/

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

	#define EM_GPO_0 ((unsigned char)BIT(0))
	#define EM_GPO_1 ((unsigned char)BIT(1))
	#define EM_GPO_2 ((unsigned char)BIT(2))
	#define EM_GPO_3 ((unsigned char)BIT(3))

	/* em28xx endpoints */
	/* 0x82: (always ?) analog */
	#define EM28XX_EP_AUDIO 0x83
	/* 0x84: digital or analog */

	/* em2800 registers */
	#define EM2800_R08_AUDIOSRC 0x08

	/* em28xx registers */

	#define EM28XX_R00_CHIPCFG 0x00

	/* em28xx Chip Configuration 0x00 */
	#define EM2860_CHIPCFG_VENDOR_AUDIO 0x80
	#define EM2860_CHIPCFG_I2S_VOLUME_CAPABLE 0x40
	#define EM2820_CHIPCFG_I2S_3_SAMPRATES 0x30
	#define EM2860_CHIPCFG_I2S_5_SAMPRATES 0x30
	#define EM2820_CHIPCFG_I2S_1_SAMPRATE 0x20
	#define EM2860_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 EM2820_R08_GPIO_CTRL 0x08 /* em2820-em2873/83 only */
	#define EM2820_R09_GPIO_STATE 0x09 /* em2820-em2873/83 only */

	#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_R0C_USBSUSP_SNAPSHOT 0x20 /* 1=button pressed, needs reset */

	#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
	/* used by all non-camera devices: */
	#define EM28XX_VINMODE_YUV422_CbYCrY 0x10
	/* used by camera devices: */
	#define EM28XX_VINMODE_YUV422_YUYV 0x08
	#define EM28XX_VINMODE_YUV422_YVYU 0x09
	#define EM28XX_VINMODE_YUV422_UYVY 0x0a
	#define EM28XX_VINMODE_YUV422_VYUY 0x0b
	#define EM28XX_VINMODE_RGB8_BGGR 0x0c
	#define EM28XX_VINMODE_RGB8_GRBG 0x0d
	#define EM28XX_VINMODE_RGB8_GBRG 0x0e
	#define EM28XX_VINMODE_RGB8_RGGB 0x0f
	/*
	* apparently:
	* bit 0: swap component 1+2 with 3+4
	* => e.g.: YUYV => YVYU, BGGR => GRBG
	* bit 1: swap component 1 with 2 and 3 with 4
	* => e.g.: YUYV => UYVY, BGGR => GBRG
	*/

	#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 /* contrast [0:4] */
	#define CONTRAST_DEFAULT 0x10

	#define EM28XX_R21_YOFFSET 0x21 /* brightness / / signed */
	#define BRIGHTNESS_DEFAULT 0x00

	#define EM28XX_R22_UVGAIN 0x22 /* saturation [0:4] */
	#define SATURATION_DEFAULT 0x10

	#define EM28XX_R23_UOFFSET 0x23 /* blue balance / / signed */
	#define BLUE_BALANCE_DEFAULT 0x00

	#define EM28XX_R24_VOFFSET 0x24 /* red balance / / signed */
	#define RED_BALANCE_DEFAULT 0x00

	#define EM28XX_R25_SHARPNESS 0x25 /* sharpness [0:4] */
	#define SHARPNESS_DEFAULT 0x00

	#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_HVSCALE_MAX 0x3fff /* => 20% */

	#define EM28XX_R34_VBI_START_H 0x34
	#define EM28XX_R35_VBI_START_V 0x35
	/*
	* NOTE: the EM276x (and EM25xx, EM277x/8x ?) (camera bridges) use these
	* registers for a different unknown purpose.
	* => register 0x34 is set to capture width / 16
	* => register 0x35 is set to capture height / 16
	*/

	#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_R5D_TS1_PKT_SIZE 0x5d
	#define EM2874_R5E_TS2_PKT_SIZE 0x5e
	/*
	* For both TS1 and TS2, In isochronous mode:
	* 0x01 188 bytes
	* 0x02 376 bytes
	* 0x03 564 bytes
	* 0x04 752 bytes
	* 0x05 940 bytes
	* In bulk mode:
	* 0x01..0xff total packet count in 188-byte
	*/

	#define EM2874_R5F_TS_ENABLE 0x5f

	/* em2874/174/84, em25xx, em276x/7x/8x GPIO registers */
	/*
	* NOTE: not all ports are bonded out;
	* Some ports are multiplexed with special function I/O
	*/
	#define EM2874_R80_GPIO_P0_CTRL 0x80
	#define EM2874_R81_GPIO_P1_CTRL 0x81
	#define EM2874_R82_GPIO_P2_CTRL 0x82
	#define EM2874_R83_GPIO_P3_CTRL 0x83
	#define EM2874_R84_GPIO_P0_STATE 0x84
	#define EM2874_R85_GPIO_P1_STATE 0x85
	#define EM2874_R86_GPIO_P2_STATE 0x86
	#define EM2874_R87_GPIO_P3_STATE 0x87

	/* em2874 IR config register (0x50) */
	#define EM2874_IR_NEC 0x00
	#define EM2874_IR_NEC_NO_PARITY 0x01
	#define EM2874_IR_RC5 0x04
	#define EM2874_IR_RC6_MODE_0 0x08
	#define EM2874_IR_RC6_MODE_6A 0x0b

	/* em2874 Transport Stream Enable Register (0x5f) */
	#define EM2874_TS1_CAPTURE_ENABLE ((unsigned char)BIT(0))
	#define EM2874_TS1_FILTER_ENABLE ((unsigned char)BIT(1))
	#define EM2874_TS1_NULL_DISCARD ((unsigned char)BIT(2))
	#define EM2874_TS2_CAPTURE_ENABLE ((unsigned char)BIT(4))
	#define EM2874_TS2_FILTER_ENABLE ((unsigned char)BIT(5))
	#define EM2874_TS2_NULL_DISCARD ((unsigned char)BIT(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_EM2800 = 7,
	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_EM2765 = 54,
	CHIP_ID_EM2874 = 65,
	CHIP_ID_EM2884 = 68,
	CHIP_ID_EM28174 = 113,
	CHIP_ID_EM28178 = 114,
	};

	/*
	* Registers used by em202
	*/

	/* 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