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/*
* Copyright (C) 2010-2011 Michael Hennerich, Analog Devices Inc.
* Copyright (C) 2008-2010 Jonathan Cameron
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* ad799x.h
*/
#ifndef _AD799X_H_
#define _AD799X_H_
#define AD799X_CHANNEL_SHIFT 4
#define AD799X_STORAGEBITS 16
/*
* AD7991, AD7995 and AD7999 defines
*/
#define AD7991_REF_SEL 0x08
#define AD7991_FLTR 0x04
#define AD7991_BIT_TRIAL_DELAY 0x02
#define AD7991_SAMPLE_DELAY 0x01
/*
* AD7992, AD7993, AD7994, AD7997 and AD7998 defines
*/
#define AD7998_FLTR 0x08
#define AD7998_ALERT_EN 0x04
#define AD7998_BUSY_ALERT 0x02
#define AD7998_BUSY_ALERT_POL 0x01
#define AD7998_CONV_RES_REG 0x0
#define AD7998_ALERT_STAT_REG 0x1
#define AD7998_CONF_REG 0x2
#define AD7998_CYCLE_TMR_REG 0x3
#define AD7998_DATALOW_CH1_REG 0x4
#define AD7998_DATAHIGH_CH1_REG 0x5
#define AD7998_HYST_CH1_REG 0x6
#define AD7998_DATALOW_CH2_REG 0x7
#define AD7998_DATAHIGH_CH2_REG 0x8
#define AD7998_HYST_CH2_REG 0x9
#define AD7998_DATALOW_CH3_REG 0xA
#define AD7998_DATAHIGH_CH3_REG 0xB
#define AD7998_HYST_CH3_REG 0xC
#define AD7998_DATALOW_CH4_REG 0xD
#define AD7998_DATAHIGH_CH4_REG 0xE
#define AD7998_HYST_CH4_REG 0xF
#define AD7998_CYC_MASK 0x7
#define AD7998_CYC_DIS 0x0
#define AD7998_CYC_TCONF_32 0x1
#define AD7998_CYC_TCONF_64 0x2
#define AD7998_CYC_TCONF_128 0x3
#define AD7998_CYC_TCONF_256 0x4
#define AD7998_CYC_TCONF_512 0x5
#define AD7998_CYC_TCONF_1024 0x6
#define AD7998_CYC_TCONF_2048 0x7
#define AD7998_ALERT_STAT_CLEAR 0xFF
/*
* AD7997 and AD7997 defines
*/
#define AD7997_8_READ_SINGLE 0x80
#define AD7997_8_READ_SEQUENCE 0x70
/* TODO: move this into a common header */
#define RES_MASK(bits) ((1 << (bits)) - 1)
enum {
ad7991,
ad7995,
ad7999,
ad7992,
ad7993,
ad7994,
ad7997,
ad7998
};
struct ad799x_state;
/**
* struct ad799x_chip_info - chip specifc information
* @channel: channel specification
* @num_channels: number of channels
* @int_vref_mv: the internal reference voltage
* @monitor_mode: whether the chip supports monitor interrupts
* @default_config: device default configuration
* @event_attrs: pointer to the monitor event attribute group
*/
struct ad799x_chip_info {
struct iio_chan_spec channel[9];
int num_channels;
u16 int_vref_mv;
u16 default_config;
const struct iio_info *info;
};
struct ad799x_state {
struct i2c_client *client;
const struct ad799x_chip_info *chip_info;
size_t d_size;
struct iio_trigger *trig;
struct regulator *reg;
u16 int_vref_mv;
unsigned id;
char *name;
u16 config;
};
/*
* TODO: struct ad799x_platform_data needs to go into include/linux/iio
*/
struct ad799x_platform_data {
u16 vref_mv;
};
int ad7997_8_set_scan_mode(struct ad799x_state *st, unsigned mask);
#ifdef CONFIG_AD799X_RING_BUFFER
int ad799x_register_ring_funcs_and_init(struct iio_dev *indio_dev);
void ad799x_ring_cleanup(struct iio_dev *indio_dev);
#else /* CONFIG_AD799X_RING_BUFFER */
static inline int
ad799x_register_ring_funcs_and_init(struct iio_dev *indio_dev)
{
return 0;
}
static inline void ad799x_ring_cleanup(struct iio_dev *indio_dev)
{
}
#endif /* CONFIG_AD799X_RING_BUFFER */
#endif /* _AD799X_H_ */
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