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/*
* AD5446 SPI DAC driver
*
* Copyright 2010 Analog Devices Inc.
*
* Licensed under the GPL-2 or later.
*/
#ifndef IIO_DAC_AD5446_H_
#define IIO_DAC_AD5446_H_
/* DAC Control Bits */
#define AD5446_LOAD (0x0 << 14) /* Load and update */
#define AD5446_SDO_DIS (0x1 << 14) /* Disable SDO */
#define AD5446_NOP (0x2 << 14) /* No operation */
#define AD5446_CLK_RISING (0x3 << 14) /* Clock data on rising edge */
#define AD5620_LOAD (0x0 << 14) /* Load and update Norm Operation*/
#define AD5620_PWRDWN_1k (0x1 << 14) /* Power-down: 1kOhm to GND */
#define AD5620_PWRDWN_100k (0x2 << 14) /* Power-down: 100kOhm to GND */
#define AD5620_PWRDWN_TRISTATE (0x3 << 14) /* Power-down: Three-state */
#define AD5660_LOAD (0x0 << 16) /* Load and update Norm Operation*/
#define AD5660_PWRDWN_1k (0x1 << 16) /* Power-down: 1kOhm to GND */
#define AD5660_PWRDWN_100k (0x2 << 16) /* Power-down: 100kOhm to GND */
#define AD5660_PWRDWN_TRISTATE (0x3 << 16) /* Power-down: Three-state */
#define MODE_PWRDWN_1k 0x1
#define MODE_PWRDWN_100k 0x2
#define MODE_PWRDWN_TRISTATE 0x3
/**
* struct ad5446_state - driver instance specific data
* @spi: spi_device
* @chip_info: chip model specific constants, available modes etc
* @reg: supply regulator
* @poll_work: bottom half of polling interrupt handler
* @vref_mv: actual reference voltage used
* @xfer: default spi transfer
* @msg: default spi message
* @data: spi transmit buffer
*/
struct ad5446_state {
struct spi_device *spi;
const struct ad5446_chip_info *chip_info;
struct regulator *reg;
struct work_struct poll_work;
unsigned short vref_mv;
unsigned cached_val;
unsigned pwr_down_mode;
unsigned pwr_down;
struct spi_transfer xfer;
struct spi_message msg;
union {
unsigned short d16;
unsigned char d24[3];
} data;
};
/**
* struct ad5446_chip_info - chip specific information
* @channel: channel spec for the DAC
* @int_vref_mv: AD5620/40/60: the internal reference voltage
* @store_sample: chip specific helper function to store the datum
* @store_sample: chip specific helper function to store the powerpown cmd
*/
struct ad5446_chip_info {
struct iio_chan_spec channel;
u16 int_vref_mv;
void (*store_sample) (struct ad5446_state *st, unsigned val);
void (*store_pwr_down) (struct ad5446_state *st, unsigned mode);
};
/**
* ad5446_supported_device_ids:
* The AD5620/40/60 parts are available in different fixed internal reference
* voltage options. The actual part numbers may look differently
* (and a bit cryptic), however this style is used to make clear which
* parts are supported here.
*/
enum ad5446_supported_device_ids {
ID_AD5444,
ID_AD5446,
ID_AD5541A,
ID_AD5542A,
ID_AD5543,
ID_AD5512A,
ID_AD5553,
ID_AD5601,
ID_AD5611,
ID_AD5621,
ID_AD5620_2500,
ID_AD5620_1250,
ID_AD5640_2500,
ID_AD5640_1250,
ID_AD5660_2500,
ID_AD5660_1250,
};
#endif /* IIO_DAC_AD5446_H_ */
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