--- /dev/null
+#ifndef SPI_ADIS16251_H_
+#define SPI_ADIS16251_H_
+
+#define ADIS16251_STARTUP_DELAY 220 /* ms */
+
+#define ADIS16251_READ_REG(a) a
+#define ADIS16251_WRITE_REG(a) ((a) | 0x80)
+
+#define ADIS16251_ENDURANCE 0x00 /* Flash memory write count */
+#define ADIS16251_SUPPLY_OUT 0x02 /* Power supply measurement */
+#define ADIS16251_GYRO_OUT 0x04 /* X-axis gyroscope output */
+#define ADIS16251_AUX_ADC 0x0A /* analog input channel measurement */
+#define ADIS16251_TEMP_OUT 0x0C /* internal temperature measurement */
+#define ADIS16251_ANGL_OUT 0x0E /* angle displacement */
+#define ADIS16251_GYRO_OFF 0x14 /* Calibration, offset/bias adjustment */
+#define ADIS16251_GYRO_SCALE 0x16 /* Calibration, scale adjustment */
+#define ADIS16251_ALM_MAG1 0x20 /* Alarm 1 magnitude/polarity setting */
+#define ADIS16251_ALM_MAG2 0x22 /* Alarm 2 magnitude/polarity setting */
+#define ADIS16251_ALM_SMPL1 0x24 /* Alarm 1 dynamic rate of change setting */
+#define ADIS16251_ALM_SMPL2 0x26 /* Alarm 2 dynamic rate of change setting */
+#define ADIS16251_ALM_CTRL 0x28 /* Alarm control */
+#define ADIS16251_AUX_DAC 0x30 /* Auxiliary DAC data */
+#define ADIS16251_GPIO_CTRL 0x32 /* Control, digital I/O line */
+#define ADIS16251_MSC_CTRL 0x34 /* Control, data ready, self-test settings */
+#define ADIS16251_SMPL_PRD 0x36 /* Control, internal sample rate */
+#define ADIS16251_SENS_AVG 0x38 /* Control, dynamic range, filtering */
+#define ADIS16251_SLP_CNT 0x3A /* Control, sleep mode initiation */
+#define ADIS16251_DIAG_STAT 0x3C /* Diagnostic, error flags */
+#define ADIS16251_GLOB_CMD 0x3E /* Control, global commands */
+
+#define ADIS16251_ERROR_ACTIVE (1<<14)
+#define ADIS16251_NEW_DATA (1<<14)
+
+/* MSC_CTRL */
+#define ADIS16251_MSC_CTRL_INT_SELF_TEST (1<<10) /* Internal self-test enable */
+#define ADIS16251_MSC_CTRL_NEG_SELF_TEST (1<<9)
+#define ADIS16251_MSC_CTRL_POS_SELF_TEST (1<<8)
+#define ADIS16251_MSC_CTRL_DATA_RDY_EN (1<<2)
+#define ADIS16251_MSC_CTRL_DATA_RDY_POL_HIGH (1<<1)
+#define ADIS16251_MSC_CTRL_DATA_RDY_DIO2 (1<<0)
+
+/* SMPL_PRD */
+#define ADIS16251_SMPL_PRD_TIME_BASE (1<<7) /* Time base (tB): 0 = 1.953 ms, 1 = 60.54 ms */
+#define ADIS16251_SMPL_PRD_DIV_MASK 0x7F
+
+/* SLP_CNT */
+#define ADIS16251_SLP_CNT_POWER_OFF 0x80
+
+/* DIAG_STAT */
+#define ADIS16251_DIAG_STAT_ALARM2 (1<<9)
+#define ADIS16251_DIAG_STAT_ALARM1 (1<<8)
+#define ADIS16251_DIAG_STAT_SELF_TEST (1<<5)
+#define ADIS16251_DIAG_STAT_OVERFLOW (1<<4)
+#define ADIS16251_DIAG_STAT_SPI_FAIL (1<<3)
+#define ADIS16251_DIAG_STAT_FLASH_UPT (1<<2)
+#define ADIS16251_DIAG_STAT_POWER_HIGH (1<<1)
+#define ADIS16251_DIAG_STAT_POWER_LOW (1<<0)
+
+#define ADIS16251_DIAG_STAT_ERR_MASK (ADIS16251_DIAG_STAT_ALARM2 | \
+ ADIS16251_DIAG_STAT_ALARM1 | \
+ ADIS16251_DIAG_STAT_SELF_TEST | \
+ ADIS16251_DIAG_STAT_OVERFLOW | \
+ ADIS16251_DIAG_STAT_SPI_FAIL | \
+ ADIS16251_DIAG_STAT_FLASH_UPT | \
+ ADIS16251_DIAG_STAT_POWER_HIGH | \
+ ADIS16251_DIAG_STAT_POWER_LOW)
+
+/* GLOB_CMD */
+#define ADIS16251_GLOB_CMD_SW_RESET (1<<7)
+#define ADIS16251_GLOB_CMD_FLASH_UPD (1<<3)
+#define ADIS16251_GLOB_CMD_DAC_LATCH (1<<2)
+#define ADIS16251_GLOB_CMD_FAC_CALIB (1<<1)
+#define ADIS16251_GLOB_CMD_AUTO_NULL (1<<0)
+
+#define ADIS16251_MAX_TX 24
+#define ADIS16251_MAX_RX 24
+
+#define ADIS16251_SPI_SLOW (u32)(300 * 1000)
+#define ADIS16251_SPI_BURST (u32)(1000 * 1000)
+#define ADIS16251_SPI_FAST (u32)(2000 * 1000)
+
+/**
+ * struct adis16251_state - device instance specific data
+ * @us: actual spi_device
+ * @work_trigger_to_ring: bh for triggered event handling
+ * @inter: used to check if new interrupt has been triggered
+ * @last_timestamp: passing timestamp from th to bh of interrupt handler
+ * @indio_dev: industrial I/O device structure
+ * @trig: data ready trigger registered with iio
+ * @tx: transmit buffer
+ * @rx: recieve buffer
+ * @buf_lock: mutex to protect tx and rx
+ **/
+struct adis16251_state {
+ struct spi_device *us;
+ struct work_struct work_trigger_to_ring;
+ s64 last_timestamp;
+ struct iio_dev *indio_dev;
+ struct iio_trigger *trig;
+ u8 *tx;
+ u8 *rx;
+ struct mutex buf_lock;
+};
+
+int adis16251_spi_write_reg_8(struct device *dev,
+ u8 reg_address,
+ u8 val);
+
+int adis16251_spi_read_burst(struct device *dev, u8 *rx);
+
+int adis16251_spi_read_sequence(struct device *dev,
+ u8 *tx, u8 *rx, int num);
+
+int adis16251_set_irq(struct device *dev, bool enable);
+
+int adis16251_reset(struct device *dev);
+
+int adis16251_stop_device(struct device *dev);
+
+int adis16251_check_status(struct device *dev);
+
+#if defined(CONFIG_IIO_RING_BUFFER) && defined(THIS_HAS_RING_BUFFER_SUPPORT)
+/* At the moment triggers are only used for ring buffer
+ * filling. This may change!
+ */
+
+enum adis16251_scan {
+ ADIS16251_SCAN_SUPPLY,
+ ADIS16251_SCAN_GYRO,
+ ADIS16251_SCAN_TEMP,
+ ADIS16251_SCAN_ADC_0,
+};
+
+void adis16251_remove_trigger(struct iio_dev *indio_dev);
+int adis16251_probe_trigger(struct iio_dev *indio_dev);
+
+ssize_t adis16251_read_data_from_ring(struct device *dev,
+ struct device_attribute *attr,
+ char *buf);
+
+
+int adis16251_configure_ring(struct iio_dev *indio_dev);
+void adis16251_unconfigure_ring(struct iio_dev *indio_dev);
+
+int adis16251_initialize_ring(struct iio_ring_buffer *ring);
+void adis16251_uninitialize_ring(struct iio_ring_buffer *ring);
+#else /* CONFIG_IIO_RING_BUFFER */
+
+static inline void adis16251_remove_trigger(struct iio_dev *indio_dev)
+{
+}
+
+static inline int adis16251_probe_trigger(struct iio_dev *indio_dev)
+{
+ return 0;
+}
+
+static inline ssize_t
+adis16251_read_data_from_ring(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ return 0;
+}
+
+static int adis16251_configure_ring(struct iio_dev *indio_dev)
+{
+ return 0;
+}
+
+static inline void adis16251_unconfigure_ring(struct iio_dev *indio_dev)
+{
+}
+
+static inline int adis16251_initialize_ring(struct iio_ring_buffer *ring)
+{
+ return 0;
+}
+
+static inline void adis16251_uninitialize_ring(struct iio_ring_buffer *ring)
+{
+}
+
+#endif /* CONFIG_IIO_RING_BUFFER */
+#endif /* SPI_ADIS16251_H_ */
projects / mv-sheeva.git / blobdiff