ad799x.h

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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 {
    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;
    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;
};

#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_ */