diff options
Diffstat (limited to 'drivers/staging/iio/adc/ad799x.h')
| -rw-r--r-- | drivers/staging/iio/adc/ad799x.h | 159 |
1 files changed, 159 insertions, 0 deletions
diff --git a/drivers/staging/iio/adc/ad799x.h b/drivers/staging/iio/adc/ad799x.h new file mode 100644 index 0000000..81a20d5 --- /dev/null +++ b/drivers/staging/iio/adc/ad799x.h @@ -0,0 +1,159 @@ +/* + * Copyright (C) 2010 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 + +enum { + ad7991, + ad7995, + ad7999, + ad7992, + ad7993, + ad7994, + ad7997, + ad7998 +}; + +struct ad799x_state; + +/** + * struct ad799x_chip_info - chip specifc information + * @num_inputs: number of physical inputs on chip + * @bits: accuracy of the adc in bits + * @int_vref_mv: the internal reference voltage + * @monitor_mode: whether the chip supports monitor interrupts + * @default_config: device default configuration + * @dev_attrs: pointer to the device attribute group + * @scan_attrs: pointer to the scan element attribute group + * @event_attrs: pointer to the monitor event attribute group + * @ad799x_set_scan_mode: function pointer to the device specific mode function + + */ +struct ad799x_chip_info { + u8 num_inputs; + u8 bits; + u8 storagebits; + char sign; + u16 int_vref_mv; + bool monitor_mode; + u16 default_config; + struct attribute_group *dev_attrs; + struct attribute_group *scan_attrs; + struct attribute_group *event_attrs; + int (*ad799x_set_scan_mode) (struct ad799x_state *st, + unsigned mask); +}; + +struct ad799x_state { + struct iio_dev *indio_dev; + struct i2c_client *client; + const struct ad799x_chip_info *chip_info; + struct work_struct poll_work; + struct work_struct work_thresh; + atomic_t protect_ring; + struct iio_trigger *trig; + struct regulator *reg; + s64 last_timestamp; + 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 ad799x_set_scan_mode(struct ad799x_state *st, unsigned mask); + +#ifdef CONFIG_AD799X_RING_BUFFER +int ad799x_single_channel_from_ring(struct ad799x_state *st, long mask); +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 */ +int ad799x_single_channel_from_ring(struct ad799x_state *st, long mask) +{ + return -EINVAL; +} + + +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_ */ |
