148 lines
3.5 KiB
C
148 lines
3.5 KiB
C
/*
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* Copyright (C) 2010-2011 Michael Hennerich, Analog Devices Inc.
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* Copyright (C) 2008-2010 Jonathan Cameron
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* ad799x.h
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*/
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#ifndef _AD799X_H_
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#define _AD799X_H_
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#define AD799X_CHANNEL_SHIFT 4
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#define AD799X_STORAGEBITS 16
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/*
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* AD7991, AD7995 and AD7999 defines
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*/
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#define AD7991_REF_SEL 0x08
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#define AD7991_FLTR 0x04
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#define AD7991_BIT_TRIAL_DELAY 0x02
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#define AD7991_SAMPLE_DELAY 0x01
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/*
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* AD7992, AD7993, AD7994, AD7997 and AD7998 defines
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*/
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#define AD7998_FLTR 0x08
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#define AD7998_ALERT_EN 0x04
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#define AD7998_BUSY_ALERT 0x02
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#define AD7998_BUSY_ALERT_POL 0x01
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#define AD7998_CONV_RES_REG 0x0
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#define AD7998_ALERT_STAT_REG 0x1
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#define AD7998_CONF_REG 0x2
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#define AD7998_CYCLE_TMR_REG 0x3
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#define AD7998_DATALOW_CH1_REG 0x4
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#define AD7998_DATAHIGH_CH1_REG 0x5
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#define AD7998_HYST_CH1_REG 0x6
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#define AD7998_DATALOW_CH2_REG 0x7
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#define AD7998_DATAHIGH_CH2_REG 0x8
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#define AD7998_HYST_CH2_REG 0x9
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#define AD7998_DATALOW_CH3_REG 0xA
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#define AD7998_DATAHIGH_CH3_REG 0xB
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#define AD7998_HYST_CH3_REG 0xC
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#define AD7998_DATALOW_CH4_REG 0xD
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#define AD7998_DATAHIGH_CH4_REG 0xE
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#define AD7998_HYST_CH4_REG 0xF
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#define AD7998_CYC_MASK 0x7
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#define AD7998_CYC_DIS 0x0
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#define AD7998_CYC_TCONF_32 0x1
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#define AD7998_CYC_TCONF_64 0x2
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#define AD7998_CYC_TCONF_128 0x3
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#define AD7998_CYC_TCONF_256 0x4
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#define AD7998_CYC_TCONF_512 0x5
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#define AD7998_CYC_TCONF_1024 0x6
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#define AD7998_CYC_TCONF_2048 0x7
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#define AD7998_ALERT_STAT_CLEAR 0xFF
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/*
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* AD7997 and AD7997 defines
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*/
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#define AD7997_8_READ_SINGLE 0x80
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#define AD7997_8_READ_SEQUENCE 0x70
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/* TODO: move this into a common header */
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#define RES_MASK(bits) ((1 << (bits)) - 1)
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enum {
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ad7991,
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ad7995,
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ad7999,
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ad7992,
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ad7993,
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ad7994,
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ad7997,
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ad7998
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};
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struct ad799x_state;
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/**
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* struct ad799x_chip_info - chip specifc information
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* @channel: channel specification
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* @num_channels: number of channels
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* @int_vref_mv: the internal reference voltage
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* @monitor_mode: whether the chip supports monitor interrupts
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* @default_config: device default configuration
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* @event_attrs: pointer to the monitor event attribute group
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*/
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struct ad799x_chip_info {
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struct iio_chan_spec channel[9];
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int num_channels;
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u16 int_vref_mv;
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u16 default_config;
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const struct iio_info *info;
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};
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struct ad799x_state {
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struct i2c_client *client;
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const struct ad799x_chip_info *chip_info;
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size_t d_size;
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struct iio_trigger *trig;
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struct regulator *reg;
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u16 int_vref_mv;
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unsigned id;
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char *name;
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u16 config;
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};
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/*
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* TODO: struct ad799x_platform_data needs to go into include/linux/iio
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*/
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struct ad799x_platform_data {
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u16 vref_mv;
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};
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int ad7997_8_set_scan_mode(struct ad799x_state *st, unsigned mask);
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#ifdef CONFIG_AD799X_RING_BUFFER
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int ad799x_single_channel_from_ring(struct ad799x_state *st, long mask);
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int ad799x_register_ring_funcs_and_init(struct iio_dev *indio_dev);
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void ad799x_ring_cleanup(struct iio_dev *indio_dev);
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#else /* CONFIG_AD799X_RING_BUFFER */
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int ad799x_single_channel_from_ring(struct ad799x_state *st, long mask)
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{
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return -EINVAL;
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}
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static inline int
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ad799x_register_ring_funcs_and_init(struct iio_dev *indio_dev)
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{
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return 0;
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}
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static inline void ad799x_ring_cleanup(struct iio_dev *indio_dev)
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{
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}
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#endif /* CONFIG_AD799X_RING_BUFFER */
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#endif /* _AD799X_H_ */
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