1 files changed, 186 insertions, 0 deletions

diff --git a/include/linux/iio/imu/adis.h b/include/linux/iio/imu/adis.h
new file mode 100644
index 000000000000..8c3304d44b97
--- /dev/null
+++ b/include/linux/iio/imu/adis.h
@@ -0,0 +1,186 @@
+/*
+ * 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)
+
+/**
+ * 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;
+};
+
+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;
+        void                    *buffer;
+
+        uint8_t                 tx[8] ____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_8(struct adis *adis, unsigned int reg, uint8_t val);
+int adis_write_reg_16(struct adis *adis, unsigned int reg, uint16_t val);
+int adis_read_reg_16(struct adis *adis, unsigned int reg, uint16_t *val);
+
+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 = IIO_CHAN_INFO_RAW_SEPARATE_BIT | \
+                IIO_CHAN_INFO_SCALE_SEPARATE_BIT, \
+        .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 = IIO_CHAN_INFO_RAW_SEPARATE_BIT | \
+                IIO_CHAN_INFO_SCALE_SEPARATE_BIT | \
+                IIO_CHAN_INFO_OFFSET_SEPARATE_BIT, \
+        .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, bits) { \
+        .type = (_type), \
+        .modified = 1, \
+        .channel2 = IIO_MOD_ ## mod, \
+        .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT | \
+                 IIO_CHAN_INFO_SCALE_SHARED_BIT | \
+                 info, \
+        .address = (addr), \
+        .scan_index = (si), \
+        .scan_type = { \
+                .sign = 's', \
+                .realbits = (bits), \
+                .storagebits = 16, \
+                .endianness = IIO_BE, \
+        }, \
+}
+
+#define ADIS_ACCEL_CHAN(mod, addr, si, info, bits) \
+        ADIS_MOD_CHAN(IIO_ACCEL, mod, addr, si, info, bits)
+
+#define ADIS_GYRO_CHAN(mod, addr, si, info, bits) \
+        ADIS_MOD_CHAN(IIO_ANGL_VEL, mod, addr, si, info, bits)
+
+#define ADIS_INCLI_CHAN(mod, addr, si, info, bits) \
+        ADIS_MOD_CHAN(IIO_INCLI, mod, addr, si, info, bits)
+
+#define ADIS_ROT_CHAN(mod, addr, si, info, bits) \
+        ADIS_MOD_CHAN(IIO_ROT, mod, addr, si, info, 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 */
+
+#endif