staging: iio: new adis16204 driver
IIO driver for Programmable High-g Digital Impact Sensor and Recorder.
Signed-off-by: Barry Song <barry.song@analog.com>
Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Acked-by: Jonathan Cameron <jic23@cam.ac.uk>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/staging/iio/accel/adis16204.h b/drivers/staging/iio/accel/adis16204.h
new file mode 100644
index 0000000..e9ed7cb
--- /dev/null
+++ b/drivers/staging/iio/accel/adis16204.h
@@ -0,0 +1,151 @@
+#ifndef SPI_ADIS16204_H_
+#define SPI_ADIS16204_H_
+
+#define ADIS16204_STARTUP_DELAY 220 /* ms */
+
+#define ADIS16204_READ_REG(a) a
+#define ADIS16204_WRITE_REG(a) ((a) | 0x80)
+
+#define ADIS16204_FLASH_CNT 0x00 /* Flash memory write count */
+#define ADIS16204_SUPPLY_OUT 0x02 /* Output, power supply */
+#define ADIS16204_XACCL_OUT 0x04 /* Output, x-axis accelerometer */
+#define ADIS16204_YACCL_OUT 0x06 /* Output, y-axis accelerometer */
+#define ADIS16204_AUX_ADC 0x08 /* Output, auxiliary ADC input */
+#define ADIS16204_TEMP_OUT 0x0A /* Output, temperature */
+#define ADIS16204_X_PEAK_OUT 0x0C /* Twos complement */
+#define ADIS16204_Y_PEAK_OUT 0x0E /* Twos complement */
+#define ADIS16204_XACCL_NULL 0x10 /* Calibration, x-axis acceleration offset null */
+#define ADIS16204_YACCL_NULL 0x12 /* Calibration, y-axis acceleration offset null */
+#define ADIS16204_XACCL_SCALE 0x14 /* X-axis scale factor calibration register */
+#define ADIS16204_YACCL_SCALE 0x16 /* Y-axis scale factor calibration register */
+#define ADIS16204_XY_RSS_OUT 0x18 /* XY combined acceleration (RSS) */
+#define ADIS16204_XY_PEAK_OUT 0x1A /* Peak, XY combined output (RSS) */
+#define ADIS16204_CAP_BUF_1 0x1C /* Capture buffer output register 1 */
+#define ADIS16204_CAP_BUF_2 0x1E /* Capture buffer output register 2 */
+#define ADIS16204_ALM_MAG1 0x20 /* Alarm 1 amplitude threshold */
+#define ADIS16204_ALM_MAG2 0x22 /* Alarm 2 amplitude threshold */
+#define ADIS16204_ALM_CTRL 0x28 /* Alarm control */
+#define ADIS16204_CAPT_PNTR 0x2A /* Capture register address pointer */
+#define ADIS16204_AUX_DAC 0x30 /* Auxiliary DAC data */
+#define ADIS16204_GPIO_CTRL 0x32 /* General-purpose digital input/output control */
+#define ADIS16204_MSC_CTRL 0x34 /* Miscellaneous control */
+#define ADIS16204_SMPL_PRD 0x36 /* Internal sample period (rate) control */
+#define ADIS16204_AVG_CNT 0x38 /* Operation, filter configuration */
+#define ADIS16204_SLP_CNT 0x3A /* Operation, sleep mode control */
+#define ADIS16204_DIAG_STAT 0x3C /* Diagnostics, system status register */
+#define ADIS16204_GLOB_CMD 0x3E /* Operation, system command register */
+
+#define ADIS16204_OUTPUTS 5
+
+/* MSC_CTRL */
+#define ADIS16204_MSC_CTRL_PWRUP_SELF_TEST (1 << 10) /* Self-test at power-on: 1 = disabled, 0 = enabled */
+#define ADIS16204_MSC_CTRL_SELF_TEST_EN (1 << 8) /* Self-test enable */
+#define ADIS16204_MSC_CTRL_DATA_RDY_EN (1 << 2) /* Data-ready enable: 1 = enabled, 0 = disabled */
+#define ADIS16204_MSC_CTRL_ACTIVE_HIGH (1 << 1) /* Data-ready polarity: 1 = active high, 0 = active low */
+#define ADIS16204_MSC_CTRL_DATA_RDY_DIO2 (1 << 0) /* Data-ready line selection: 1 = DIO2, 0 = DIO1 */
+
+/* DIAG_STAT */
+#define ADIS16204_DIAG_STAT_ALARM2 (1<<9) /* Alarm 2 status: 1 = alarm active, 0 = alarm inactive */
+#define ADIS16204_DIAG_STAT_ALARM1 (1<<8) /* Alarm 1 status: 1 = alarm active, 0 = alarm inactive */
+#define ADIS16204_DIAG_STAT_SELFTEST_FAIL (1<<5) /* Self-test diagnostic error flag: 1 = error condition,
+ 0 = normal operation */
+#define ADIS16204_DIAG_STAT_SPI_FAIL (1<<3) /* SPI communications failure */
+#define ADIS16204_DIAG_STAT_FLASH_UPT (1<<2) /* Flash update failure */
+#define ADIS16204_DIAG_STAT_POWER_HIGH (1<<1) /* Power supply above 3.625 V */
+#define ADIS16204_DIAG_STAT_POWER_LOW (1<<0) /* Power supply below 2.975 V */
+
+/* GLOB_CMD */
+#define ADIS16204_GLOB_CMD_SW_RESET (1<<7)
+#define ADIS16204_GLOB_CMD_CLEAR_STAT (1<<4)
+#define ADIS16204_GLOB_CMD_FACTORY_CAL (1<<1)
+
+#define ADIS16204_MAX_TX 24
+#define ADIS16204_MAX_RX 24
+
+#define ADIS16204_ERROR_ACTIVE (1<<14)
+
+/**
+ * struct adis16204_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 adis16204_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 adis16204_set_irq(struct device *dev, bool enable);
+
+#ifdef CONFIG_IIO_RING_BUFFER
+enum adis16204_scan {
+ ADIS16204_SCAN_SUPPLY,
+ ADIS16204_SCAN_ACC_X,
+ ADIS16204_SCAN_ACC_Y,
+ ADIS16204_SCAN_AUX_ADC,
+ ADIS16204_SCAN_TEMP,
+};
+
+void adis16204_remove_trigger(struct iio_dev *indio_dev);
+int adis16204_probe_trigger(struct iio_dev *indio_dev);
+
+ssize_t adis16204_read_data_from_ring(struct device *dev,
+ struct device_attribute *attr,
+ char *buf);
+
+int adis16204_configure_ring(struct iio_dev *indio_dev);
+void adis16204_unconfigure_ring(struct iio_dev *indio_dev);
+
+int adis16204_initialize_ring(struct iio_ring_buffer *ring);
+void adis16204_uninitialize_ring(struct iio_ring_buffer *ring);
+#else /* CONFIG_IIO_RING_BUFFER */
+
+static inline void adis16204_remove_trigger(struct iio_dev *indio_dev)
+{
+}
+
+static inline int adis16204_probe_trigger(struct iio_dev *indio_dev)
+{
+ return 0;
+}
+
+static inline ssize_t
+adis16204_read_data_from_ring(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ return 0;
+}
+
+static int adis16204_configure_ring(struct iio_dev *indio_dev)
+{
+ return 0;
+}
+
+static inline void adis16204_unconfigure_ring(struct iio_dev *indio_dev)
+{
+}
+
+static inline int adis16204_initialize_ring(struct iio_ring_buffer *ring)
+{
+ return 0;
+}
+
+static inline void adis16204_uninitialize_ring(struct iio_ring_buffer *ring)
+{
+}
+
+#endif /* CONFIG_IIO_RING_BUFFER */
+#endif /* SPI_ADIS16204_H_ */