| /* |
| * AD7792/AD7793 SPI ADC driver |
| * |
| * Copyright 2011 Analog Devices Inc. |
| * |
| * Licensed under the GPL-2. |
| */ |
| #ifndef IIO_ADC_AD7793_H_ |
| #define IIO_ADC_AD7793_H_ |
| |
| /* |
| * TODO: struct ad7793_platform_data needs to go into include/linux/iio |
| */ |
| |
| /* Registers */ |
| #define AD7793_REG_COMM 0 /* Communications Register (WO, 8-bit) */ |
| #define AD7793_REG_STAT 0 /* Status Register (RO, 8-bit) */ |
| #define AD7793_REG_MODE 1 /* Mode Register (RW, 16-bit */ |
| #define AD7793_REG_CONF 2 /* Configuration Register (RW, 16-bit) */ |
| #define AD7793_REG_DATA 3 /* Data Register (RO, 16-/24-bit) */ |
| #define AD7793_REG_ID 4 /* ID Register (RO, 8-bit) */ |
| #define AD7793_REG_IO 5 /* IO Register (RO, 8-bit) */ |
| #define AD7793_REG_OFFSET 6 /* Offset Register (RW, 16-bit |
| * (AD7792)/24-bit (AD7793)) */ |
| #define AD7793_REG_FULLSALE 7 /* Full-Scale Register |
| * (RW, 16-bit (AD7792)/24-bit (AD7793)) */ |
| |
| /* Communications Register Bit Designations (AD7793_REG_COMM) */ |
| #define AD7793_COMM_WEN (1 << 7) /* Write Enable */ |
| #define AD7793_COMM_WRITE (0 << 6) /* Write Operation */ |
| #define AD7793_COMM_READ (1 << 6) /* Read Operation */ |
| #define AD7793_COMM_ADDR(x) (((x) & 0x7) << 3) /* Register Address */ |
| #define AD7793_COMM_CREAD (1 << 2) /* Continuous Read of Data Register */ |
| |
| /* Status Register Bit Designations (AD7793_REG_STAT) */ |
| #define AD7793_STAT_RDY (1 << 7) /* Ready */ |
| #define AD7793_STAT_ERR (1 << 6) /* Error (Overrange, Underrange) */ |
| #define AD7793_STAT_CH3 (1 << 2) /* Channel 3 */ |
| #define AD7793_STAT_CH2 (1 << 1) /* Channel 2 */ |
| #define AD7793_STAT_CH1 (1 << 0) /* Channel 1 */ |
| |
| /* Mode Register Bit Designations (AD7793_REG_MODE) */ |
| #define AD7793_MODE_SEL(x) (((x) & 0x7) << 13) /* Operation Mode Select */ |
| #define AD7793_MODE_CLKSRC(x) (((x) & 0x3) << 6) /* ADC Clock Source Select */ |
| #define AD7793_MODE_RATE(x) ((x) & 0xF) /* Filter Update Rate Select */ |
| |
| #define AD7793_MODE_CONT 0 /* Continuous Conversion Mode */ |
| #define AD7793_MODE_SINGLE 1 /* Single Conversion Mode */ |
| #define AD7793_MODE_IDLE 2 /* Idle Mode */ |
| #define AD7793_MODE_PWRDN 3 /* Power-Down Mode */ |
| #define AD7793_MODE_CAL_INT_ZERO 4 /* Internal Zero-Scale Calibration */ |
| #define AD7793_MODE_CAL_INT_FULL 5 /* Internal Full-Scale Calibration */ |
| #define AD7793_MODE_CAL_SYS_ZERO 6 /* System Zero-Scale Calibration */ |
| #define AD7793_MODE_CAL_SYS_FULL 7 /* System Full-Scale Calibration */ |
| |
| #define AD7793_CLK_INT 0 /* Internal 64 kHz Clock not |
| * available at the CLK pin */ |
| #define AD7793_CLK_INT_CO 1 /* Internal 64 kHz Clock available |
| * at the CLK pin */ |
| #define AD7793_CLK_EXT 2 /* External 64 kHz Clock */ |
| #define AD7793_CLK_EXT_DIV2 3 /* External Clock divided by 2 */ |
| |
| /* Configuration Register Bit Designations (AD7793_REG_CONF) */ |
| #define AD7793_CONF_VBIAS(x) (((x) & 0x3) << 14) /* Bias Voltage |
| * Generator Enable */ |
| #define AD7793_CONF_BO_EN (1 << 13) /* Burnout Current Enable */ |
| #define AD7793_CONF_UNIPOLAR (1 << 12) /* Unipolar/Bipolar Enable */ |
| #define AD7793_CONF_BOOST (1 << 11) /* Boost Enable */ |
| #define AD7793_CONF_GAIN(x) (((x) & 0x7) << 8) /* Gain Select */ |
| #define AD7793_CONF_REFSEL (1 << 7) /* INT/EXT Reference Select */ |
| #define AD7793_CONF_BUF (1 << 4) /* Buffered Mode Enable */ |
| #define AD7793_CONF_CHAN(x) ((x) & 0x7) /* Channel select */ |
| |
| #define AD7793_CH_AIN1P_AIN1M 0 /* AIN1(+) - AIN1(-) */ |
| #define AD7793_CH_AIN2P_AIN2M 1 /* AIN2(+) - AIN2(-) */ |
| #define AD7793_CH_AIN3P_AIN3M 2 /* AIN3(+) - AIN3(-) */ |
| #define AD7793_CH_AIN1M_AIN1M 3 /* AIN1(-) - AIN1(-) */ |
| #define AD7793_CH_TEMP 6 /* Temp Sensor */ |
| #define AD7793_CH_AVDD_MONITOR 7 /* AVDD Monitor */ |
| |
| /* ID Register Bit Designations (AD7793_REG_ID) */ |
| #define AD7792_ID 0xA |
| #define AD7793_ID 0xB |
| #define AD7793_ID_MASK 0xF |
| |
| /* IO (Excitation Current Sources) Register Bit Designations (AD7793_REG_IO) */ |
| #define AD7793_IO_IEXC1_IOUT1_IEXC2_IOUT2 0 /* IEXC1 connect to IOUT1, |
| * IEXC2 connect to IOUT2 */ |
| #define AD7793_IO_IEXC1_IOUT2_IEXC2_IOUT1 1 /* IEXC1 connect to IOUT2, |
| * IEXC2 connect to IOUT1 */ |
| #define AD7793_IO_IEXC1_IEXC2_IOUT1 2 /* Both current sources |
| * IEXC1,2 connect to IOUT1 */ |
| #define AD7793_IO_IEXC1_IEXC2_IOUT2 3 /* Both current sources |
| * IEXC1,2 connect to IOUT2 */ |
| |
| #define AD7793_IO_IXCEN_10uA (1 << 0) /* Excitation Current 10uA */ |
| #define AD7793_IO_IXCEN_210uA (2 << 0) /* Excitation Current 210uA */ |
| #define AD7793_IO_IXCEN_1mA (3 << 0) /* Excitation Current 1mA */ |
| |
| struct ad7793_platform_data { |
| u16 vref_mv; |
| u16 mode; |
| u16 conf; |
| u8 io; |
| }; |
| |
| #endif /* IIO_ADC_AD7793_H_ */ |
