Initial import

1 files changed, 283 insertions, 0 deletions

diff --git a/include/linux/iio/imu/adis.h b/include/linux/iio/imu/adis.h
new file mode 100644
index 000000000..fa2d01ef8
--- /dev/null
+++ b/include/linux/iio/imu/adis.h
@@ -0,0 +1,283 @@
+/*
+ * 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, info_all, bits) { \
+	.type = IIO_VOLTAGE, \
+	.indexed = 1, \
+	.channel = (chan), \
+	.extend_name = name, \
+	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \
+		BIT(IIO_CHAN_INFO_SCALE), \
+	.info_mask_shared_by_all = info_all, \
+	.address = (addr), \
+	.scan_index = (si), \
+	.scan_type = { \
+		.sign = 'u', \
+		.realbits = (bits), \
+		.storagebits = 16, \
+		.endianness = IIO_BE, \
+	}, \
+}
+
+#define ADIS_SUPPLY_CHAN(addr, si, info_all, bits) \
+	ADIS_VOLTAGE_CHAN(addr, si, 0, "supply", info_all, bits)
+
+#define ADIS_AUX_ADC_CHAN(addr, si, info_all, bits) \
+	ADIS_VOLTAGE_CHAN(addr, si, 1, NULL, info_all, bits)
+
+#define ADIS_TEMP_CHAN(addr, si, info_all, 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), \
+	.info_mask_shared_by_all = info_all, \
+	.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, info_all, 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), \
+	.info_mask_shared_by_all = info_all, \
+	.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, info_all, bits) \
+	ADIS_MOD_CHAN(IIO_ACCEL, mod, addr, si, info_sep, info_all, bits)
+
+#define ADIS_GYRO_CHAN(mod, addr, si, info_sep, info_all, bits)		\
+	ADIS_MOD_CHAN(IIO_ANGL_VEL, mod, addr, si, info_sep, info_all, bits)
+
+#define ADIS_INCLI_CHAN(mod, addr, si, info_sep, info_all, bits) \
+	ADIS_MOD_CHAN(IIO_INCLI, mod, addr, si, info_sep, info_all, bits)
+
+#define ADIS_ROT_CHAN(mod, addr, si, info_sep, info_all, bits) \
+	ADIS_MOD_CHAN(IIO_ROT, mod, addr, si, info_sep, info_all, 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