Edit File: adis.h
/* * Common library for ADIS16XXX devices * * Copyright 2012 Analog Devices Inc. * Author: Lars-Peter Clausen <lars@metafoo.de> * * Licensed under the GPL-2 or later. */ #ifndef __IIO_ADIS_H__ #define __IIO_ADIS_H__ #include <linux/spi/spi.h> #include <linux/interrupt.h> #include <linux/iio/types.h> #define ADIS_WRITE_REG(reg) ((0x80 | (reg))) #define ADIS_READ_REG(reg) ((reg) & 0x7f) #define ADIS_PAGE_SIZE 0x80 #define ADIS_REG_PAGE_ID 0x00 struct adis; /** * struct adis_data - ADIS chip variant specific data * @read_delay: SPI delay for read operations in us * @write_delay: SPI delay for write operations in us * @glob_cmd_reg: Register address of the GLOB_CMD register * @msc_ctrl_reg: Register address of the MSC_CTRL register * @diag_stat_reg: Register address of the DIAG_STAT register * @status_error_msgs: Array of error messgaes * @status_error_mask: */ struct adis_data { unsigned int read_delay; unsigned int write_delay; unsigned int glob_cmd_reg; unsigned int msc_ctrl_reg; unsigned int diag_stat_reg; unsigned int self_test_mask; unsigned int startup_delay; const char * const *status_error_msgs; unsigned int status_error_mask; int (*enable_irq)(struct adis *adis, bool enable); bool has_paging; }; struct adis { struct spi_device *spi; struct iio_trigger *trig; const struct adis_data *data; struct mutex txrx_lock; struct spi_message msg; struct spi_transfer *xfer; unsigned int current_page; void *buffer; uint8_t tx[10] ____cacheline_aligned; uint8_t rx[4]; }; int adis_init(struct adis *adis, struct iio_dev *indio_dev, struct spi_device *spi, const struct adis_data *data); int adis_reset(struct adis *adis); int adis_write_reg(struct adis *adis, unsigned int reg, unsigned int val, unsigned int size); int adis_read_reg(struct adis *adis, unsigned int reg, unsigned int *val, unsigned int size); /** * adis_write_reg_8() - Write single byte to a register * @adis: The adis device * @reg: The address of the register to be written * @value: The value to write */ static inline int adis_write_reg_8(struct adis *adis, unsigned int reg, uint8_t val) { return adis_write_reg(adis, reg, val, 1); } /** * adis_write_reg_16() - Write 2 bytes to a pair of registers * @adis: The adis device * @reg: The address of the lower of the two registers * @value: Value to be written */ static inline int adis_write_reg_16(struct adis *adis, unsigned int reg, uint16_t val) { return adis_write_reg(adis, reg, val, 2); } /** * adis_write_reg_32() - write 4 bytes to four registers * @adis: The adis device * @reg: The address of the lower of the four register * @value: Value to be written */ static inline int adis_write_reg_32(struct adis *adis, unsigned int reg, uint32_t val) { return adis_write_reg(adis, reg, val, 4); } /** * adis_read_reg_16() - read 2 bytes from a 16-bit register * @adis: The adis device * @reg: The address of the lower of the two registers * @val: The value read back from the device */ static inline int adis_read_reg_16(struct adis *adis, unsigned int reg, uint16_t *val) { unsigned int tmp; int ret; ret = adis_read_reg(adis, reg, &tmp, 2); *val = tmp; return ret; } /** * adis_read_reg_32() - read 4 bytes from a 32-bit register * @adis: The adis device * @reg: The address of the lower of the two registers * @val: The value read back from the device */ static inline int adis_read_reg_32(struct adis *adis, unsigned int reg, uint32_t *val) { unsigned int tmp; int ret; ret = adis_read_reg(adis, reg, &tmp, 4); *val = tmp; return ret; } int adis_enable_irq(struct adis *adis, bool enable); int adis_check_status(struct adis *adis); int adis_initial_startup(struct adis *adis); int adis_single_conversion(struct iio_dev *indio_dev, const struct iio_chan_spec *chan, unsigned int error_mask, int *val); #define ADIS_VOLTAGE_CHAN(addr, si, chan, name, bits) { \ .type = IIO_VOLTAGE, \ .indexed = 1, \ .channel = (chan), \ .extend_name = name, \ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \ BIT(IIO_CHAN_INFO_SCALE), \ .address = (addr), \ .scan_index = (si), \ .scan_type = { \ .sign = 'u', \ .realbits = (bits), \ .storagebits = 16, \ .endianness = IIO_BE, \ }, \ } #define ADIS_SUPPLY_CHAN(addr, si, bits) \ ADIS_VOLTAGE_CHAN(addr, si, 0, "supply", bits) #define ADIS_AUX_ADC_CHAN(addr, si, bits) \ ADIS_VOLTAGE_CHAN(addr, si, 1, NULL, bits) #define ADIS_TEMP_CHAN(addr, si, bits) { \ .type = IIO_TEMP, \ .indexed = 1, \ .channel = 0, \ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \ BIT(IIO_CHAN_INFO_SCALE) | \ BIT(IIO_CHAN_INFO_OFFSET), \ .address = (addr), \ .scan_index = (si), \ .scan_type = { \ .sign = 'u', \ .realbits = (bits), \ .storagebits = 16, \ .endianness = IIO_BE, \ }, \ } #define ADIS_MOD_CHAN(_type, mod, addr, si, info_sep, bits) { \ .type = (_type), \ .modified = 1, \ .channel2 = IIO_MOD_ ## mod, \ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \ info_sep, \ .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE), \ .address = (addr), \ .scan_index = (si), \ .scan_type = { \ .sign = 's', \ .realbits = (bits), \ .storagebits = 16, \ .endianness = IIO_BE, \ }, \ } #define ADIS_ACCEL_CHAN(mod, addr, si, info_sep, bits) \ ADIS_MOD_CHAN(IIO_ACCEL, mod, addr, si, info_sep, bits) #define ADIS_GYRO_CHAN(mod, addr, si, info_sep, bits) \ ADIS_MOD_CHAN(IIO_ANGL_VEL, mod, addr, si, info_sep, bits) #define ADIS_INCLI_CHAN(mod, addr, si, info_sep, bits) \ ADIS_MOD_CHAN(IIO_INCLI, mod, addr, si, info_sep, bits) #define ADIS_ROT_CHAN(mod, addr, si, info_sep, bits) \ ADIS_MOD_CHAN(IIO_ROT, mod, addr, si, info_sep, bits) #ifdef CONFIG_IIO_ADIS_LIB_BUFFER int adis_setup_buffer_and_trigger(struct adis *adis, struct iio_dev *indio_dev, irqreturn_t (*trigger_handler)(int, void *)); void adis_cleanup_buffer_and_trigger(struct adis *adis, struct iio_dev *indio_dev); int adis_probe_trigger(struct adis *adis, struct iio_dev *indio_dev); void adis_remove_trigger(struct adis *adis); int adis_update_scan_mode(struct iio_dev *indio_dev, const unsigned long *scan_mask); #else /* CONFIG_IIO_BUFFER */ static inline int adis_setup_buffer_and_trigger(struct adis *adis, struct iio_dev *indio_dev, irqreturn_t (*trigger_handler)(int, void *)) { return 0; } static inline void adis_cleanup_buffer_and_trigger(struct adis *adis, struct iio_dev *indio_dev) { } static inline int adis_probe_trigger(struct adis *adis, struct iio_dev *indio_dev) { return 0; } static inline void adis_remove_trigger(struct adis *adis) { } #define adis_update_scan_mode NULL #endif /* CONFIG_IIO_BUFFER */ #ifdef CONFIG_DEBUG_FS int adis_debugfs_reg_access(struct iio_dev *indio_dev, unsigned int reg, unsigned int writeval, unsigned int *readval); #else #define adis_debugfs_reg_access NULL #endif #endif