146 lines
3.3 KiB
C
146 lines
3.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
|
|
/*
|
|
* This file is part of AD5686 DAC driver
|
|
*
|
|
* Copyright 2018 Analog Devices Inc.
|
|
*/
|
|
|
|
#ifndef __DRIVERS_IIO_DAC_AD5686_H__
|
|
#define __DRIVERS_IIO_DAC_AD5686_H__
|
|
|
|
#include <linux/types.h>
|
|
#include <linux/cache.h>
|
|
#include <linux/mutex.h>
|
|
#include <linux/kernel.h>
|
|
|
|
#define AD5683_DATA(x) ((x) << 4)
|
|
#define AD5686_ADDR(x) ((x) << 16)
|
|
#define AD5686_CMD(x) ((x) << 20)
|
|
|
|
#define AD5686_ADDR_DAC(chan) (0x1 << (chan))
|
|
#define AD5686_ADDR_ALL_DAC 0xF
|
|
|
|
#define AD5686_CMD_NOOP 0x0
|
|
#define AD5686_CMD_WRITE_INPUT_N 0x1
|
|
#define AD5686_CMD_UPDATE_DAC_N 0x2
|
|
#define AD5686_CMD_WRITE_INPUT_N_UPDATE_N 0x3
|
|
#define AD5686_CMD_POWERDOWN_DAC 0x4
|
|
#define AD5686_CMD_LDAC_MASK 0x5
|
|
#define AD5686_CMD_RESET 0x6
|
|
#define AD5686_CMD_INTERNAL_REFER_SETUP 0x7
|
|
#define AD5686_CMD_DAISY_CHAIN_ENABLE 0x8
|
|
#define AD5686_CMD_READBACK_ENABLE 0x9
|
|
|
|
#define AD5686_LDAC_PWRDN_NONE 0x0
|
|
#define AD5686_LDAC_PWRDN_1K 0x1
|
|
#define AD5686_LDAC_PWRDN_100K 0x2
|
|
#define AD5686_LDAC_PWRDN_3STATE 0x3
|
|
|
|
#define AD5686_CMD_CONTROL_REG 0x4
|
|
#define AD5686_CMD_READBACK_ENABLE_V2 0x5
|
|
#define AD5683_REF_BIT_MSK BIT(12)
|
|
#define AD5693_REF_BIT_MSK BIT(12)
|
|
|
|
/**
|
|
* ad5686_supported_device_ids:
|
|
*/
|
|
enum ad5686_supported_device_ids {
|
|
ID_AD5671R,
|
|
ID_AD5672R,
|
|
ID_AD5675R,
|
|
ID_AD5676,
|
|
ID_AD5676R,
|
|
ID_AD5681R,
|
|
ID_AD5682R,
|
|
ID_AD5683,
|
|
ID_AD5683R,
|
|
ID_AD5684,
|
|
ID_AD5684R,
|
|
ID_AD5685R,
|
|
ID_AD5686,
|
|
ID_AD5686R,
|
|
ID_AD5691R,
|
|
ID_AD5692R,
|
|
ID_AD5693,
|
|
ID_AD5693R,
|
|
ID_AD5694,
|
|
ID_AD5694R,
|
|
ID_AD5695R,
|
|
ID_AD5696,
|
|
ID_AD5696R,
|
|
};
|
|
|
|
enum ad5686_regmap_type {
|
|
AD5683_REGMAP,
|
|
AD5686_REGMAP,
|
|
AD5693_REGMAP
|
|
};
|
|
|
|
struct ad5686_state;
|
|
|
|
typedef int (*ad5686_write_func)(struct ad5686_state *st,
|
|
u8 cmd, u8 addr, u16 val);
|
|
|
|
typedef int (*ad5686_read_func)(struct ad5686_state *st, u8 addr);
|
|
|
|
/**
|
|
* struct ad5686_chip_info - chip specific information
|
|
* @int_vref_mv: AD5620/40/60: the internal reference voltage
|
|
* @num_channels: number of channels
|
|
* @channel: channel specification
|
|
* @regmap_type: register map layout variant
|
|
*/
|
|
|
|
struct ad5686_chip_info {
|
|
u16 int_vref_mv;
|
|
unsigned int num_channels;
|
|
struct iio_chan_spec *channels;
|
|
enum ad5686_regmap_type regmap_type;
|
|
};
|
|
|
|
/**
|
|
* struct ad5446_state - driver instance specific data
|
|
* @spi: spi_device
|
|
* @chip_info: chip model specific constants, available modes etc
|
|
* @reg: supply regulator
|
|
* @vref_mv: actual reference voltage used
|
|
* @pwr_down_mask: power down mask
|
|
* @pwr_down_mode: current power down mode
|
|
* @use_internal_vref: set to true if the internal reference voltage is used
|
|
* @data: spi transfer buffers
|
|
*/
|
|
|
|
struct ad5686_state {
|
|
struct device *dev;
|
|
const struct ad5686_chip_info *chip_info;
|
|
struct regulator *reg;
|
|
unsigned short vref_mv;
|
|
unsigned int pwr_down_mask;
|
|
unsigned int pwr_down_mode;
|
|
ad5686_write_func write;
|
|
ad5686_read_func read;
|
|
bool use_internal_vref;
|
|
|
|
/*
|
|
* DMA (thus cache coherency maintenance) requires the
|
|
* transfer buffers to live in their own cache lines.
|
|
*/
|
|
|
|
union {
|
|
__be32 d32;
|
|
__be16 d16;
|
|
u8 d8[4];
|
|
} data[3] ____cacheline_aligned;
|
|
};
|
|
|
|
|
|
int ad5686_probe(struct device *dev,
|
|
enum ad5686_supported_device_ids chip_type,
|
|
const char *name, ad5686_write_func write,
|
|
ad5686_read_func read);
|
|
|
|
int ad5686_remove(struct device *dev);
|
|
|
|
|
|
#endif /* __DRIVERS_IIO_DAC_AD5686_H__ */
|