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>
This commit is contained in:
Barry Song
Greg Kroah-Hartman
parent
f11ba4f577
commit
bb6f19eafe
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@ -21,6 +21,15 @@ config ADIS16203
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Say yes here to build support for Analog Devices adis16203 Programmable
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Say yes here to build support for Analog Devices adis16203 Programmable
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360 Degrees Inclinometer.
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360 Degrees Inclinometer.
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config ADIS16204
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tristate "Analog Devices ADIS16204 Programmable High-g Digital Impact Sensor and Recorder"
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depends on SPI
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select IIO_TRIGGER if IIO_RING_BUFFER
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select IIO_SW_RING if IIO_RING_BUFFER
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help
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Say yes here to build support for Analog Devices adis16204 Programmable
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High-g Digital Impact Sensor and Recorder.
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config ADIS16209
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config ADIS16209
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tristate "Analog Devices ADIS16209 Dual-Axis Digital Inclinometer and Accelerometer"
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tristate "Analog Devices ADIS16209 Dual-Axis Digital Inclinometer and Accelerometer"
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depends on SPI
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depends on SPI
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@ -10,6 +10,10 @@ adis16203-y := adis16203_core.o
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adis16203-$(CONFIG_IIO_RING_BUFFER) += adis16203_ring.o adis16203_trigger.o
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adis16203-$(CONFIG_IIO_RING_BUFFER) += adis16203_ring.o adis16203_trigger.o
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obj-$(CONFIG_ADIS16203) += adis16203.o
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obj-$(CONFIG_ADIS16203) += adis16203.o
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adis16204-y := adis16204_core.o
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adis16204-$(CONFIG_IIO_RING_BUFFER) += adis16204_ring.o adis16204_trigger.o
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obj-$(CONFIG_ADIS16204) += adis16204.o
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adis16209-y := adis16209_core.o
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adis16209-y := adis16209_core.o
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adis16209-$(CONFIG_IIO_RING_BUFFER) += adis16209_ring.o adis16209_trigger.o
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adis16209-$(CONFIG_IIO_RING_BUFFER) += adis16209_ring.o adis16209_trigger.o
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obj-$(CONFIG_ADIS16209) += adis16209.o
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obj-$(CONFIG_ADIS16209) += adis16209.o
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@ -65,3 +65,23 @@
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#define IIO_DEV_ATTR_ACCEL_Z(_show, _addr) \
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#define IIO_DEV_ATTR_ACCEL_Z(_show, _addr) \
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IIO_DEVICE_ATTR(accel_z_raw, S_IRUGO, _show, NULL, _addr)
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IIO_DEVICE_ATTR(accel_z_raw, S_IRUGO, _show, NULL, _addr)
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#define IIO_DEV_ATTR_ACCEL_XY(_show, _addr) \
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IIO_DEVICE_ATTR(accel_xy, S_IRUGO, _show, NULL, _addr)
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#define IIO_DEV_ATTR_ACCEL_PEAK(_show, _addr) \
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IIO_DEVICE_ATTR(accel_peak, S_IRUGO, _show, NULL, _addr)
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#define IIO_DEV_ATTR_ACCEL_XPEAK(_show, _addr) \
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IIO_DEVICE_ATTR(accel_xpeak, S_IRUGO, _show, NULL, _addr)
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#define IIO_DEV_ATTR_ACCEL_YPEAK(_show, _addr) \
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IIO_DEVICE_ATTR(accel_ypeak, S_IRUGO, _show, NULL, _addr)
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#define IIO_DEV_ATTR_ACCEL_ZPEAK(_show, _addr) \
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IIO_DEVICE_ATTR(accel_zpeak, S_IRUGO, _show, NULL, _addr)
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#define IIO_DEV_ATTR_ACCEL_XYPEAK(_show, _addr) \
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IIO_DEVICE_ATTR(accel_xypeak, S_IRUGO, _show, NULL, _addr)
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#define IIO_DEV_ATTR_ACCEL_XYZPEAK(_show, _addr) \
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IIO_DEVICE_ATTR(accel_xyzpeak, S_IRUGO, _show, NULL, _addr)
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@ -0,0 +1,151 @@
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#ifndef SPI_ADIS16204_H_
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#define SPI_ADIS16204_H_
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#define ADIS16204_STARTUP_DELAY 220 /* ms */
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#define ADIS16204_READ_REG(a) a
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#define ADIS16204_WRITE_REG(a) ((a) | 0x80)
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#define ADIS16204_FLASH_CNT 0x00 /* Flash memory write count */
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#define ADIS16204_SUPPLY_OUT 0x02 /* Output, power supply */
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#define ADIS16204_XACCL_OUT 0x04 /* Output, x-axis accelerometer */
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#define ADIS16204_YACCL_OUT 0x06 /* Output, y-axis accelerometer */
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#define ADIS16204_AUX_ADC 0x08 /* Output, auxiliary ADC input */
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#define ADIS16204_TEMP_OUT 0x0A /* Output, temperature */
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#define ADIS16204_X_PEAK_OUT 0x0C /* Twos complement */
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#define ADIS16204_Y_PEAK_OUT 0x0E /* Twos complement */
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#define ADIS16204_XACCL_NULL 0x10 /* Calibration, x-axis acceleration offset null */
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#define ADIS16204_YACCL_NULL 0x12 /* Calibration, y-axis acceleration offset null */
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#define ADIS16204_XACCL_SCALE 0x14 /* X-axis scale factor calibration register */
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#define ADIS16204_YACCL_SCALE 0x16 /* Y-axis scale factor calibration register */
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#define ADIS16204_XY_RSS_OUT 0x18 /* XY combined acceleration (RSS) */
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#define ADIS16204_XY_PEAK_OUT 0x1A /* Peak, XY combined output (RSS) */
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#define ADIS16204_CAP_BUF_1 0x1C /* Capture buffer output register 1 */
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#define ADIS16204_CAP_BUF_2 0x1E /* Capture buffer output register 2 */
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#define ADIS16204_ALM_MAG1 0x20 /* Alarm 1 amplitude threshold */
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#define ADIS16204_ALM_MAG2 0x22 /* Alarm 2 amplitude threshold */
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#define ADIS16204_ALM_CTRL 0x28 /* Alarm control */
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#define ADIS16204_CAPT_PNTR 0x2A /* Capture register address pointer */
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#define ADIS16204_AUX_DAC 0x30 /* Auxiliary DAC data */
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#define ADIS16204_GPIO_CTRL 0x32 /* General-purpose digital input/output control */
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#define ADIS16204_MSC_CTRL 0x34 /* Miscellaneous control */
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#define ADIS16204_SMPL_PRD 0x36 /* Internal sample period (rate) control */
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#define ADIS16204_AVG_CNT 0x38 /* Operation, filter configuration */
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#define ADIS16204_SLP_CNT 0x3A /* Operation, sleep mode control */
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#define ADIS16204_DIAG_STAT 0x3C /* Diagnostics, system status register */
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#define ADIS16204_GLOB_CMD 0x3E /* Operation, system command register */
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#define ADIS16204_OUTPUTS 5
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/* MSC_CTRL */
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#define ADIS16204_MSC_CTRL_PWRUP_SELF_TEST (1 << 10) /* Self-test at power-on: 1 = disabled, 0 = enabled */
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#define ADIS16204_MSC_CTRL_SELF_TEST_EN (1 << 8) /* Self-test enable */
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#define ADIS16204_MSC_CTRL_DATA_RDY_EN (1 << 2) /* Data-ready enable: 1 = enabled, 0 = disabled */
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#define ADIS16204_MSC_CTRL_ACTIVE_HIGH (1 << 1) /* Data-ready polarity: 1 = active high, 0 = active low */
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#define ADIS16204_MSC_CTRL_DATA_RDY_DIO2 (1 << 0) /* Data-ready line selection: 1 = DIO2, 0 = DIO1 */
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/* DIAG_STAT */
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#define ADIS16204_DIAG_STAT_ALARM2 (1<<9) /* Alarm 2 status: 1 = alarm active, 0 = alarm inactive */
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#define ADIS16204_DIAG_STAT_ALARM1 (1<<8) /* Alarm 1 status: 1 = alarm active, 0 = alarm inactive */
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#define ADIS16204_DIAG_STAT_SELFTEST_FAIL (1<<5) /* Self-test diagnostic error flag: 1 = error condition,
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0 = normal operation */
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#define ADIS16204_DIAG_STAT_SPI_FAIL (1<<3) /* SPI communications failure */
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#define ADIS16204_DIAG_STAT_FLASH_UPT (1<<2) /* Flash update failure */
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#define ADIS16204_DIAG_STAT_POWER_HIGH (1<<1) /* Power supply above 3.625 V */
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#define ADIS16204_DIAG_STAT_POWER_LOW (1<<0) /* Power supply below 2.975 V */
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/* GLOB_CMD */
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#define ADIS16204_GLOB_CMD_SW_RESET (1<<7)
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#define ADIS16204_GLOB_CMD_CLEAR_STAT (1<<4)
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#define ADIS16204_GLOB_CMD_FACTORY_CAL (1<<1)
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#define ADIS16204_MAX_TX 24
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#define ADIS16204_MAX_RX 24
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#define ADIS16204_ERROR_ACTIVE (1<<14)
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/**
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* struct adis16204_state - device instance specific data
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* @us: actual spi_device
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* @work_trigger_to_ring: bh for triggered event handling
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* @inter: used to check if new interrupt has been triggered
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* @last_timestamp: passing timestamp from th to bh of interrupt handler
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* @indio_dev: industrial I/O device structure
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* @trig: data ready trigger registered with iio
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* @tx: transmit buffer
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* @rx: recieve buffer
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* @buf_lock: mutex to protect tx and rx
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**/
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struct adis16204_state {
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struct spi_device *us;
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struct work_struct work_trigger_to_ring;
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s64 last_timestamp;
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struct iio_dev *indio_dev;
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struct iio_trigger *trig;
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u8 *tx;
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u8 *rx;
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struct mutex buf_lock;
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};
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int adis16204_set_irq(struct device *dev, bool enable);
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#ifdef CONFIG_IIO_RING_BUFFER
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enum adis16204_scan {
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ADIS16204_SCAN_SUPPLY,
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ADIS16204_SCAN_ACC_X,
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ADIS16204_SCAN_ACC_Y,
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ADIS16204_SCAN_AUX_ADC,
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ADIS16204_SCAN_TEMP,
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};
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void adis16204_remove_trigger(struct iio_dev *indio_dev);
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int adis16204_probe_trigger(struct iio_dev *indio_dev);
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ssize_t adis16204_read_data_from_ring(struct device *dev,
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struct device_attribute *attr,
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char *buf);
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int adis16204_configure_ring(struct iio_dev *indio_dev);
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void adis16204_unconfigure_ring(struct iio_dev *indio_dev);
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int adis16204_initialize_ring(struct iio_ring_buffer *ring);
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void adis16204_uninitialize_ring(struct iio_ring_buffer *ring);
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#else /* CONFIG_IIO_RING_BUFFER */
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static inline void adis16204_remove_trigger(struct iio_dev *indio_dev)
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{
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}
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static inline int adis16204_probe_trigger(struct iio_dev *indio_dev)
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{
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return 0;
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}
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static inline ssize_t
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adis16204_read_data_from_ring(struct device *dev,
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struct device_attribute *attr,
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char *buf)
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{
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return 0;
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}
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static int adis16204_configure_ring(struct iio_dev *indio_dev)
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{
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return 0;
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}
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static inline void adis16204_unconfigure_ring(struct iio_dev *indio_dev)
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{
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}
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static inline int adis16204_initialize_ring(struct iio_ring_buffer *ring)
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{
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return 0;
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}
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static inline void adis16204_uninitialize_ring(struct iio_ring_buffer *ring)
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{
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}
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#endif /* CONFIG_IIO_RING_BUFFER */
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#endif /* SPI_ADIS16204_H_ */
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@ -0,0 +1,613 @@
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/*
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* ADIS16204 Programmable High-g Digital Impact Sensor and Recorder
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*
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* Copyright 2010 Analog Devices Inc.
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*
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* Licensed under the GPL-2 or later.
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*/
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#include <linux/interrupt.h>
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#include <linux/irq.h>
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#include <linux/gpio.h>
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#include <linux/delay.h>
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#include <linux/mutex.h>
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#include <linux/device.h>
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#include <linux/kernel.h>
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#include <linux/spi/spi.h>
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#include <linux/slab.h>
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#include <linux/sysfs.h>
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#include <linux/list.h>
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#include "../iio.h"
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#include "../sysfs.h"
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#include "accel.h"
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#include "../gyro/gyro.h"
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#include "../adc/adc.h"
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#include "adis16204.h"
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#define DRIVER_NAME "adis16204"
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static int adis16204_check_status(struct device *dev);
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/**
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* adis16204_spi_write_reg_8() - write single byte to a register
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* @dev: device associated with child of actual device (iio_dev or iio_trig)
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* @reg_address: the address of the register to be written
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* @val: the value to write
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**/
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static int adis16204_spi_write_reg_8(struct device *dev,
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u8 reg_address,
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u8 val)
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{
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int ret;
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struct iio_dev *indio_dev = dev_get_drvdata(dev);
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struct adis16204_state *st = iio_dev_get_devdata(indio_dev);
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mutex_lock(&st->buf_lock);
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st->tx[0] = ADIS16204_WRITE_REG(reg_address);
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st->tx[1] = val;
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ret = spi_write(st->us, st->tx, 2);
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mutex_unlock(&st->buf_lock);
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return ret;
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}
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/**
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* adis16204_spi_write_reg_16() - write 2 bytes to a pair of registers
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* @dev: device associated with child of actual device (iio_dev or iio_trig)
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* @reg_address: the address of the lower of the two registers. Second register
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* is assumed to have address one greater.
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* @val: value to be written
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**/
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static int adis16204_spi_write_reg_16(struct device *dev,
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u8 lower_reg_address,
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u16 value)
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{
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int ret;
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struct spi_message msg;
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struct iio_dev *indio_dev = dev_get_drvdata(dev);
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struct adis16204_state *st = iio_dev_get_devdata(indio_dev);
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struct spi_transfer xfers[] = {
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{
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.tx_buf = st->tx,
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.bits_per_word = 8,
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.len = 2,
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.cs_change = 1,
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}, {
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.tx_buf = st->tx + 2,
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.bits_per_word = 8,
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.len = 2,
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.cs_change = 1,
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},
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};
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mutex_lock(&st->buf_lock);
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st->tx[0] = ADIS16204_WRITE_REG(lower_reg_address);
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st->tx[1] = value & 0xFF;
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st->tx[2] = ADIS16204_WRITE_REG(lower_reg_address + 1);
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st->tx[3] = (value >> 8) & 0xFF;
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spi_message_init(&msg);
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spi_message_add_tail(&xfers[0], &msg);
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spi_message_add_tail(&xfers[1], &msg);
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ret = spi_sync(st->us, &msg);
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mutex_unlock(&st->buf_lock);
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return ret;
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}
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/**
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* adis16204_spi_read_reg_16() - read 2 bytes from a 16-bit register
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* @dev: device associated with child of actual device (iio_dev or iio_trig)
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* @reg_address: the address of the lower of the two registers. Second register
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* is assumed to have address one greater.
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* @val: somewhere to pass back the value read
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**/
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static int adis16204_spi_read_reg_16(struct device *dev,
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u8 lower_reg_address,
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u16 *val)
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{
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struct spi_message msg;
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||||||
|
struct iio_dev *indio_dev = dev_get_drvdata(dev);
|
||||||
|
struct adis16204_state *st = iio_dev_get_devdata(indio_dev);
|
||||||
|
int ret;
|
||||||
|
struct spi_transfer xfers[] = {
|
||||||
|
{
|
||||||
|
.tx_buf = st->tx,
|
||||||
|
.bits_per_word = 8,
|
||||||
|
.len = 2,
|
||||||
|
.cs_change = 1,
|
||||||
|
.delay_usecs = 20,
|
||||||
|
}, {
|
||||||
|
.rx_buf = st->rx,
|
||||||
|
.bits_per_word = 8,
|
||||||
|
.len = 2,
|
||||||
|
.cs_change = 1,
|
||||||
|
.delay_usecs = 20,
|
||||||
|
},
|
||||||
|
};
|
||||||
|
|
||||||
|
mutex_lock(&st->buf_lock);
|
||||||
|
st->tx[0] = ADIS16204_READ_REG(lower_reg_address);
|
||||||
|
st->tx[1] = 0;
|
||||||
|
|
||||||
|
spi_message_init(&msg);
|
||||||
|
spi_message_add_tail(&xfers[0], &msg);
|
||||||
|
spi_message_add_tail(&xfers[1], &msg);
|
||||||
|
ret = spi_sync(st->us, &msg);
|
||||||
|
if (ret) {
|
||||||
|
dev_err(&st->us->dev, "problem when reading 16 bit register 0x%02X",
|
||||||
|
lower_reg_address);
|
||||||
|
goto error_ret;
|
||||||
|
}
|
||||||
|
*val = (st->rx[0] << 8) | st->rx[1];
|
||||||
|
|
||||||
|
error_ret:
|
||||||
|
mutex_unlock(&st->buf_lock);
|
||||||
|
return ret;
|
||||||
|
}
|
||||||
|
|
||||||
|
static ssize_t adis16204_read_12bit_unsigned(struct device *dev,
|
||||||
|
struct device_attribute *attr,
|
||||||
|
char *buf)
|
||||||
|
{
|
||||||
|
int ret;
|
||||||
|
u16 val = 0;
|
||||||
|
struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
|
||||||
|
|
||||||
|
ret = adis16204_spi_read_reg_16(dev, this_attr->address, &val);
|
||||||
|
if (ret)
|
||||||
|
return ret;
|
||||||
|
|
||||||
|
if (val & ADIS16204_ERROR_ACTIVE)
|
||||||
|
adis16204_check_status(dev);
|
||||||
|
|
||||||
|
return sprintf(buf, "%u\n", val & 0x0FFF);
|
||||||
|
}
|
||||||
|
|
||||||
|
static ssize_t adis16204_read_temp(struct device *dev,
|
||||||
|
struct device_attribute *attr,
|
||||||
|
char *buf)
|
||||||
|
{
|
||||||
|
struct iio_dev *indio_dev = dev_get_drvdata(dev);
|
||||||
|
ssize_t ret;
|
||||||
|
u16 val;
|
||||||
|
|
||||||
|
/* Take the iio_dev status lock */
|
||||||
|
mutex_lock(&indio_dev->mlock);
|
||||||
|
|
||||||
|
ret = adis16204_spi_read_reg_16(dev, ADIS16204_TEMP_OUT, (u16 *)&val);
|
||||||
|
if (ret)
|
||||||
|
goto error_ret;
|
||||||
|
|
||||||
|
if (val & ADIS16204_ERROR_ACTIVE)
|
||||||
|
adis16204_check_status(dev);
|
||||||
|
|
||||||
|
val &= 0xFFF;
|
||||||
|
ret = sprintf(buf, "%d\n", val);
|
||||||
|
|
||||||
|
error_ret:
|
||||||
|
mutex_unlock(&indio_dev->mlock);
|
||||||
|
return ret;
|
||||||
|
}
|
||||||
|
|
||||||
|
static ssize_t adis16204_read_12bit_signed(struct device *dev,
|
||||||
|
struct device_attribute *attr,
|
||||||
|
char *buf)
|
||||||
|
{
|
||||||
|
struct iio_dev *indio_dev = dev_get_drvdata(dev);
|
||||||
|
struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
|
||||||
|
s16 val = 0;
|
||||||
|
ssize_t ret;
|
||||||
|
|
||||||
|
mutex_lock(&indio_dev->mlock);
|
||||||
|
|
||||||
|
ret = adis16204_spi_read_reg_16(dev, this_attr->address, (u16 *)&val);
|
||||||
|
if (!ret) {
|
||||||
|
if (val & ADIS16204_ERROR_ACTIVE)
|
||||||
|
adis16204_check_status(dev);
|
||||||
|
|
||||||
|
val = ((s16)(val << 4) >> 4);
|
||||||
|
ret = sprintf(buf, "%d\n", val);
|
||||||
|
}
|
||||||
|
|
||||||
|
mutex_unlock(&indio_dev->mlock);
|
||||||
|
|
||||||
|
return ret;
|
||||||
|
}
|
||||||
|
|
||||||
|
static ssize_t adis16204_read_14bit_signed(struct device *dev,
|
||||||
|
struct device_attribute *attr,
|
||||||
|
char *buf)
|
||||||
|
{
|
||||||
|
struct iio_dev *indio_dev = dev_get_drvdata(dev);
|
||||||
|
struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
|
||||||
|
s16 val = 0;
|
||||||
|
ssize_t ret;
|
||||||
|
|
||||||
|
mutex_lock(&indio_dev->mlock);
|
||||||
|
|
||||||
|
ret = adis16204_spi_read_reg_16(dev, this_attr->address, (u16 *)&val);
|
||||||
|
if (!ret) {
|
||||||
|
if (val & ADIS16204_ERROR_ACTIVE)
|
||||||
|
adis16204_check_status(dev);
|
||||||
|
|
||||||
|
val = ((s16)(val << 2) >> 2);
|
||||||
|
ret = sprintf(buf, "%d\n", val);
|
||||||
|
}
|
||||||
|
|
||||||
|
mutex_unlock(&indio_dev->mlock);
|
||||||
|
|
||||||
|
return ret;
|
||||||
|
}
|
||||||
|
|
||||||
|
static ssize_t adis16204_write_16bit(struct device *dev,
|
||||||
|
struct device_attribute *attr,
|
||||||
|
const char *buf,
|
||||||
|
size_t len)
|
||||||
|
{
|
||||||
|
struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
|
||||||
|
int ret;
|
||||||
|
long val;
|
||||||
|
|
||||||
|
ret = strict_strtol(buf, 10, &val);
|
||||||
|
if (ret)
|
||||||
|
goto error_ret;
|
||||||
|
ret = adis16204_spi_write_reg_16(dev, this_attr->address, val);
|
||||||
|
|
||||||
|
error_ret:
|
||||||
|
return ret ? ret : len;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int adis16204_reset(struct device *dev)
|
||||||
|
{
|
||||||
|
int ret;
|
||||||
|
ret = adis16204_spi_write_reg_8(dev,
|
||||||
|
ADIS16204_GLOB_CMD,
|
||||||
|
ADIS16204_GLOB_CMD_SW_RESET);
|
||||||
|
if (ret)
|
||||||
|
dev_err(dev, "problem resetting device");
|
||||||
|
|
||||||
|
return ret;
|
||||||
|
}
|
||||||
|
|
||||||
|
static ssize_t adis16204_write_reset(struct device *dev,
|
||||||
|
struct device_attribute *attr,
|
||||||
|
const char *buf, size_t len)
|
||||||
|
{
|
||||||
|
if (len < 1)
|
||||||
|
return -EINVAL;
|
||||||
|
switch (buf[0]) {
|
||||||
|
case '1':
|
||||||
|
case 'y':
|
||||||
|
case 'Y':
|
||||||
|
return adis16204_reset(dev);
|
||||||
|
}
|
||||||
|
return -EINVAL;
|
||||||
|
}
|
||||||
|
|
||||||
|
int adis16204_set_irq(struct device *dev, bool enable)
|
||||||
|
{
|
||||||
|
int ret = 0;
|
||||||
|
u16 msc;
|
||||||
|
|
||||||
|
ret = adis16204_spi_read_reg_16(dev, ADIS16204_MSC_CTRL, &msc);
|
||||||
|
if (ret)
|
||||||
|
goto error_ret;
|
||||||
|
|
||||||
|
msc |= ADIS16204_MSC_CTRL_ACTIVE_HIGH;
|
||||||
|
msc &= ~ADIS16204_MSC_CTRL_DATA_RDY_DIO2;
|
||||||
|
if (enable)
|
||||||
|
msc |= ADIS16204_MSC_CTRL_DATA_RDY_EN;
|
||||||
|
else
|
||||||
|
msc &= ~ADIS16204_MSC_CTRL_DATA_RDY_EN;
|
||||||
|
|
||||||
|
ret = adis16204_spi_write_reg_16(dev, ADIS16204_MSC_CTRL, msc);
|
||||||
|
|
||||||
|
error_ret:
|
||||||
|
return ret;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int adis16204_check_status(struct device *dev)
|
||||||
|
{
|
||||||
|
u16 status;
|
||||||
|
int ret;
|
||||||
|
|
||||||
|
ret = adis16204_spi_read_reg_16(dev, ADIS16204_DIAG_STAT, &status);
|
||||||
|
if (ret < 0) {
|
||||||
|
dev_err(dev, "Reading status failed\n");
|
||||||
|
goto error_ret;
|
||||||
|
}
|
||||||
|
ret = status & 0x1F;
|
||||||
|
|
||||||
|
if (status & ADIS16204_DIAG_STAT_SELFTEST_FAIL)
|
||||||
|
dev_err(dev, "Self test failure\n");
|
||||||
|
if (status & ADIS16204_DIAG_STAT_SPI_FAIL)
|
||||||
|
dev_err(dev, "SPI failure\n");
|
||||||
|
if (status & ADIS16204_DIAG_STAT_FLASH_UPT)
|
||||||
|
dev_err(dev, "Flash update failed\n");
|
||||||
|
if (status & ADIS16204_DIAG_STAT_POWER_HIGH)
|
||||||
|
dev_err(dev, "Power supply above 3.625V\n");
|
||||||
|
if (status & ADIS16204_DIAG_STAT_POWER_LOW)
|
||||||
|
dev_err(dev, "Power supply below 2.975V\n");
|
||||||
|
|
||||||
|
error_ret:
|
||||||
|
return ret;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int adis16204_self_test(struct device *dev)
|
||||||
|
{
|
||||||
|
int ret;
|
||||||
|
ret = adis16204_spi_write_reg_16(dev,
|
||||||
|
ADIS16204_MSC_CTRL,
|
||||||
|
ADIS16204_MSC_CTRL_SELF_TEST_EN);
|
||||||
|
if (ret) {
|
||||||
|
dev_err(dev, "problem starting self test");
|
||||||
|
goto err_ret;
|
||||||
|
}
|
||||||
|
|
||||||
|
adis16204_check_status(dev);
|
||||||
|
|
||||||
|
err_ret:
|
||||||
|
return ret;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int adis16204_initial_setup(struct adis16204_state *st)
|
||||||
|
{
|
||||||
|
int ret;
|
||||||
|
struct device *dev = &st->indio_dev->dev;
|
||||||
|
|
||||||
|
/* Disable IRQ */
|
||||||
|
ret = adis16204_set_irq(dev, false);
|
||||||
|
if (ret) {
|
||||||
|
dev_err(dev, "disable irq failed");
|
||||||
|
goto err_ret;
|
||||||
|
}
|
||||||
|
|
||||||
|
/* Do self test */
|
||||||
|
ret = adis16204_self_test(dev);
|
||||||
|
if (ret) {
|
||||||
|
dev_err(dev, "self test failure");
|
||||||
|
goto err_ret;
|
||||||
|
}
|
||||||
|
|
||||||
|
/* Read status register to check the result */
|
||||||
|
ret = adis16204_check_status(dev);
|
||||||
|
if (ret) {
|
||||||
|
adis16204_reset(dev);
|
||||||
|
dev_err(dev, "device not playing ball -> reset");
|
||||||
|
msleep(ADIS16204_STARTUP_DELAY);
|
||||||
|
ret = adis16204_check_status(dev);
|
||||||
|
if (ret) {
|
||||||
|
dev_err(dev, "giving up");
|
||||||
|
goto err_ret;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
printk(KERN_INFO DRIVER_NAME ": at CS%d (irq %d)\n",
|
||||||
|
st->us->chip_select, st->us->irq);
|
||||||
|
|
||||||
|
err_ret:
|
||||||
|
return ret;
|
||||||
|
}
|
||||||
|
|
||||||
|
static IIO_DEV_ATTR_IN_NAMED_RAW(0, supply, adis16204_read_12bit_unsigned,
|
||||||
|
ADIS16204_SUPPLY_OUT);
|
||||||
|
static IIO_CONST_ATTR(in0_supply_scale, "0.00122");
|
||||||
|
static IIO_DEV_ATTR_IN_RAW(1, adis16204_read_12bit_unsigned,
|
||||||
|
ADIS16204_AUX_ADC);
|
||||||
|
static IIO_CONST_ATTR(in1_scale, "0.00061");
|
||||||
|
|
||||||
|
static IIO_DEV_ATTR_ACCEL_X(adis16204_read_14bit_signed,
|
||||||
|
ADIS16204_XACCL_OUT);
|
||||||
|
static IIO_DEV_ATTR_ACCEL_Y(adis16204_read_14bit_signed,
|
||||||
|
ADIS16204_YACCL_OUT);
|
||||||
|
static IIO_DEV_ATTR_ACCEL_XY(adis16204_read_14bit_signed,
|
||||||
|
ADIS16204_XY_RSS_OUT);
|
||||||
|
static IIO_DEV_ATTR_ACCEL_XPEAK(adis16204_read_14bit_signed,
|
||||||
|
ADIS16204_X_PEAK_OUT);
|
||||||
|
static IIO_DEV_ATTR_ACCEL_YPEAK(adis16204_read_14bit_signed,
|
||||||
|
ADIS16204_Y_PEAK_OUT);
|
||||||
|
static IIO_DEV_ATTR_ACCEL_XYPEAK(adis16204_read_14bit_signed,
|
||||||
|
ADIS16204_XY_PEAK_OUT);
|
||||||
|
static IIO_DEV_ATTR_ACCEL_X_OFFSET(S_IWUSR | S_IRUGO,
|
||||||
|
adis16204_read_12bit_signed,
|
||||||
|
adis16204_write_16bit,
|
||||||
|
ADIS16204_XACCL_NULL);
|
||||||
|
static IIO_DEV_ATTR_ACCEL_Y_OFFSET(S_IWUSR | S_IRUGO,
|
||||||
|
adis16204_read_12bit_signed,
|
||||||
|
adis16204_write_16bit,
|
||||||
|
ADIS16204_YACCL_NULL);
|
||||||
|
static IIO_CONST_ATTR(accel_x_scale, "0.017125");
|
||||||
|
static IIO_CONST_ATTR(accel_y_scale, "0.008407");
|
||||||
|
static IIO_CONST_ATTR(accel_xy_scale, "0.017125");
|
||||||
|
|
||||||
|
static IIO_DEV_ATTR_TEMP_RAW(adis16204_read_temp);
|
||||||
|
static IIO_CONST_ATTR(temp_offset, "25");
|
||||||
|
static IIO_CONST_ATTR(temp_scale, "-0.47");
|
||||||
|
|
||||||
|
static IIO_DEVICE_ATTR(reset, S_IWUSR, NULL, adis16204_write_reset, 0);
|
||||||
|
|
||||||
|
static IIO_CONST_ATTR(name, "adis16204");
|
||||||
|
|
||||||
|
static struct attribute *adis16204_event_attributes[] = {
|
||||||
|
NULL
|
||||||
|
};
|
||||||
|
|
||||||
|
static struct attribute_group adis16204_event_attribute_group = {
|
||||||
|
.attrs = adis16204_event_attributes,
|
||||||
|
};
|
||||||
|
|
||||||
|
static struct attribute *adis16204_attributes[] = {
|
||||||
|
&iio_dev_attr_in0_supply_raw.dev_attr.attr,
|
||||||
|
&iio_const_attr_in0_supply_scale.dev_attr.attr,
|
||||||
|
&iio_dev_attr_temp_raw.dev_attr.attr,
|
||||||
|
&iio_const_attr_temp_offset.dev_attr.attr,
|
||||||
|
&iio_const_attr_temp_scale.dev_attr.attr,
|
||||||
|
&iio_dev_attr_reset.dev_attr.attr,
|
||||||
|
&iio_const_attr_name.dev_attr.attr,
|
||||||
|
&iio_dev_attr_in1_raw.dev_attr.attr,
|
||||||
|
&iio_const_attr_in1_scale.dev_attr.attr,
|
||||||
|
&iio_dev_attr_accel_x_raw.dev_attr.attr,
|
||||||
|
&iio_dev_attr_accel_y_raw.dev_attr.attr,
|
||||||
|
&iio_dev_attr_accel_xy.dev_attr.attr,
|
||||||
|
&iio_dev_attr_accel_xpeak.dev_attr.attr,
|
||||||
|
&iio_dev_attr_accel_ypeak.dev_attr.attr,
|
||||||
|
&iio_dev_attr_accel_xypeak.dev_attr.attr,
|
||||||
|
&iio_dev_attr_accel_x_offset.dev_attr.attr,
|
||||||
|
&iio_dev_attr_accel_y_offset.dev_attr.attr,
|
||||||
|
&iio_const_attr_accel_x_scale.dev_attr.attr,
|
||||||
|
&iio_const_attr_accel_y_scale.dev_attr.attr,
|
||||||
|
&iio_const_attr_accel_xy_scale.dev_attr.attr,
|
||||||
|
NULL
|
||||||
|
};
|
||||||
|
|
||||||
|
static const struct attribute_group adis16204_attribute_group = {
|
||||||
|
.attrs = adis16204_attributes,
|
||||||
|
};
|
||||||
|
|
||||||
|
static int __devinit adis16204_probe(struct spi_device *spi)
|
||||||
|
{
|
||||||
|
int ret, regdone = 0;
|
||||||
|
struct adis16204_state *st = kzalloc(sizeof *st, GFP_KERNEL);
|
||||||
|
if (!st) {
|
||||||
|
ret = -ENOMEM;
|
||||||
|
goto error_ret;
|
||||||
|
}
|
||||||
|
/* this is only used for removal purposes */
|
||||||
|
spi_set_drvdata(spi, st);
|
||||||
|
|
||||||
|
/* Allocate the comms buffers */
|
||||||
|
st->rx = kzalloc(sizeof(*st->rx)*ADIS16204_MAX_RX, GFP_KERNEL);
|
||||||
|
if (st->rx == NULL) {
|
||||||
|
ret = -ENOMEM;
|
||||||
|
goto error_free_st;
|
||||||
|
}
|
||||||
|
st->tx = kzalloc(sizeof(*st->tx)*ADIS16204_MAX_TX, GFP_KERNEL);
|
||||||
|
if (st->tx == NULL) {
|
||||||
|
ret = -ENOMEM;
|
||||||
|
goto error_free_rx;
|
||||||
|
}
|
||||||
|
st->us = spi;
|
||||||
|
mutex_init(&st->buf_lock);
|
||||||
|
/* setup the industrialio driver allocated elements */
|
||||||
|
st->indio_dev = iio_allocate_device();
|
||||||
|
if (st->indio_dev == NULL) {
|
||||||
|
ret = -ENOMEM;
|
||||||
|
goto error_free_tx;
|
||||||
|
}
|
||||||
|
|
||||||
|
st->indio_dev->dev.parent = &spi->dev;
|
||||||
|
st->indio_dev->num_interrupt_lines = 1;
|
||||||
|
st->indio_dev->event_attrs = &adis16204_event_attribute_group;
|
||||||
|
st->indio_dev->attrs = &adis16204_attribute_group;
|
||||||
|
st->indio_dev->dev_data = (void *)(st);
|
||||||
|
st->indio_dev->driver_module = THIS_MODULE;
|
||||||
|
st->indio_dev->modes = INDIO_DIRECT_MODE;
|
||||||
|
|
||||||
|
ret = adis16204_configure_ring(st->indio_dev);
|
||||||
|
if (ret)
|
||||||
|
goto error_free_dev;
|
||||||
|
|
||||||
|
ret = iio_device_register(st->indio_dev);
|
||||||
|
if (ret)
|
||||||
|
goto error_unreg_ring_funcs;
|
||||||
|
regdone = 1;
|
||||||
|
|
||||||
|
ret = adis16204_initialize_ring(st->indio_dev->ring);
|
||||||
|
if (ret) {
|
||||||
|
printk(KERN_ERR "failed to initialize the ring\n");
|
||||||
|
goto error_unreg_ring_funcs;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (spi->irq) {
|
||||||
|
ret = iio_register_interrupt_line(spi->irq,
|
||||||
|
st->indio_dev,
|
||||||
|
0,
|
||||||
|
IRQF_TRIGGER_RISING,
|
||||||
|
"adis16204");
|
||||||
|
if (ret)
|
||||||
|
goto error_uninitialize_ring;
|
||||||
|
|
||||||
|
ret = adis16204_probe_trigger(st->indio_dev);
|
||||||
|
if (ret)
|
||||||
|
goto error_unregister_line;
|
||||||
|
}
|
||||||
|
|
||||||
|
/* Get the device into a sane initial state */
|
||||||
|
ret = adis16204_initial_setup(st);
|
||||||
|
if (ret)
|
||||||
|
goto error_remove_trigger;
|
||||||
|
return 0;
|
||||||
|
|
||||||
|
error_remove_trigger:
|
||||||
|
adis16204_remove_trigger(st->indio_dev);
|
||||||
|
error_unregister_line:
|
||||||
|
if (spi->irq)
|
||||||
|
iio_unregister_interrupt_line(st->indio_dev, 0);
|
||||||
|
error_uninitialize_ring:
|
||||||
|
adis16204_uninitialize_ring(st->indio_dev->ring);
|
||||||
|
error_unreg_ring_funcs:
|
||||||
|
adis16204_unconfigure_ring(st->indio_dev);
|
||||||
|
error_free_dev:
|
||||||
|
if (regdone)
|
||||||
|
iio_device_unregister(st->indio_dev);
|
||||||
|
else
|
||||||
|
iio_free_device(st->indio_dev);
|
||||||
|
error_free_tx:
|
||||||
|
kfree(st->tx);
|
||||||
|
error_free_rx:
|
||||||
|
kfree(st->rx);
|
||||||
|
error_free_st:
|
||||||
|
kfree(st);
|
||||||
|
error_ret:
|
||||||
|
return ret;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int adis16204_remove(struct spi_device *spi)
|
||||||
|
{
|
||||||
|
struct adis16204_state *st = spi_get_drvdata(spi);
|
||||||
|
struct iio_dev *indio_dev = st->indio_dev;
|
||||||
|
|
||||||
|
flush_scheduled_work();
|
||||||
|
|
||||||
|
adis16204_remove_trigger(indio_dev);
|
||||||
|
if (spi->irq)
|
||||||
|
iio_unregister_interrupt_line(indio_dev, 0);
|
||||||
|
|
||||||
|
adis16204_uninitialize_ring(indio_dev->ring);
|
||||||
|
iio_device_unregister(indio_dev);
|
||||||
|
adis16204_unconfigure_ring(indio_dev);
|
||||||
|
kfree(st->tx);
|
||||||
|
kfree(st->rx);
|
||||||
|
kfree(st);
|
||||||
|
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
static struct spi_driver adis16204_driver = {
|
||||||
|
.driver = {
|
||||||
|
.name = "adis16204",
|
||||||
|
.owner = THIS_MODULE,
|
||||||
|
},
|
||||||
|
.probe = adis16204_probe,
|
||||||
|
.remove = __devexit_p(adis16204_remove),
|
||||||
|
};
|
||||||
|
|
||||||
|
static __init int adis16204_init(void)
|
||||||
|
{
|
||||||
|
return spi_register_driver(&adis16204_driver);
|
||||||
|
}
|
||||||
|
module_init(adis16204_init);
|
||||||
|
|
||||||
|
static __exit void adis16204_exit(void)
|
||||||
|
{
|
||||||
|
spi_unregister_driver(&adis16204_driver);
|
||||||
|
}
|
||||||
|
module_exit(adis16204_exit);
|
||||||
|
|
||||||
|
MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>");
|
||||||
|
MODULE_DESCRIPTION("Analog Devices ADIS16204 Programmable High-g Digital Impact Sensor and Recorder");
|
||||||
|
MODULE_LICENSE("GPL v2");
|
||||||
|
|
@ -0,0 +1,206 @@
|
||||||
|
#include <linux/interrupt.h>
|
||||||
|
#include <linux/irq.h>
|
||||||
|
#include <linux/gpio.h>
|
||||||
|
#include <linux/workqueue.h>
|
||||||
|
#include <linux/mutex.h>
|
||||||
|
#include <linux/device.h>
|
||||||
|
#include <linux/kernel.h>
|
||||||
|
#include <linux/spi/spi.h>
|
||||||
|
#include <linux/slab.h>
|
||||||
|
#include <linux/sysfs.h>
|
||||||
|
#include <linux/list.h>
|
||||||
|
|
||||||
|
#include "../iio.h"
|
||||||
|
#include "../sysfs.h"
|
||||||
|
#include "../ring_sw.h"
|
||||||
|
#include "accel.h"
|
||||||
|
#include "../trigger.h"
|
||||||
|
#include "adis16204.h"
|
||||||
|
|
||||||
|
static IIO_SCAN_EL_C(in_supply, ADIS16204_SCAN_SUPPLY, ADIS16204_SUPPLY_OUT, NULL);
|
||||||
|
static IIO_CONST_ATTR_SCAN_EL_TYPE(in_supply, u, 12, 16);
|
||||||
|
static IIO_SCAN_EL_C(accel_x, ADIS16204_SCAN_ACC_X, ADIS16204_XACCL_OUT, NULL);
|
||||||
|
static IIO_SCAN_EL_C(accel_y, ADIS16204_SCAN_ACC_Y, ADIS16204_YACCL_OUT, NULL);
|
||||||
|
static IIO_CONST_ATTR_SCAN_EL_TYPE(accel, s, 14, 16);
|
||||||
|
static IIO_SCAN_EL_C(in0, ADIS16204_SCAN_AUX_ADC, ADIS16204_AUX_ADC, NULL);
|
||||||
|
static IIO_CONST_ATTR_SCAN_EL_TYPE(in0, u, 12, 16);
|
||||||
|
static IIO_SCAN_EL_C(temp, ADIS16204_SCAN_TEMP, ADIS16204_TEMP_OUT, NULL);
|
||||||
|
static IIO_CONST_ATTR_SCAN_EL_TYPE(temp, u, 12, 16);
|
||||||
|
static IIO_SCAN_EL_TIMESTAMP(5);
|
||||||
|
static IIO_CONST_ATTR_SCAN_EL_TYPE(timestamp, s, 64, 64);
|
||||||
|
|
||||||
|
static struct attribute *adis16204_scan_el_attrs[] = {
|
||||||
|
&iio_scan_el_in_supply.dev_attr.attr,
|
||||||
|
&iio_const_attr_in_supply_index.dev_attr.attr,
|
||||||
|
&iio_const_attr_in_supply_type.dev_attr.attr,
|
||||||
|
&iio_scan_el_accel_x.dev_attr.attr,
|
||||||
|
&iio_const_attr_accel_x_index.dev_attr.attr,
|
||||||
|
&iio_scan_el_accel_y.dev_attr.attr,
|
||||||
|
&iio_const_attr_accel_y_index.dev_attr.attr,
|
||||||
|
&iio_const_attr_accel_type.dev_attr.attr,
|
||||||
|
&iio_scan_el_in0.dev_attr.attr,
|
||||||
|
&iio_const_attr_in0_index.dev_attr.attr,
|
||||||
|
&iio_const_attr_in0_type.dev_attr.attr,
|
||||||
|
&iio_scan_el_temp.dev_attr.attr,
|
||||||
|
&iio_const_attr_temp_index.dev_attr.attr,
|
||||||
|
&iio_const_attr_temp_type.dev_attr.attr,
|
||||||
|
&iio_scan_el_timestamp.dev_attr.attr,
|
||||||
|
&iio_const_attr_timestamp_index.dev_attr.attr,
|
||||||
|
&iio_const_attr_timestamp_type.dev_attr.attr,
|
||||||
|
NULL,
|
||||||
|
};
|
||||||
|
|
||||||
|
static struct attribute_group adis16204_scan_el_group = {
|
||||||
|
.attrs = adis16204_scan_el_attrs,
|
||||||
|
.name = "scan_elements",
|
||||||
|
};
|
||||||
|
|
||||||
|
/**
|
||||||
|
* adis16204_poll_func_th() top half interrupt handler called by trigger
|
||||||
|
* @private_data: iio_dev
|
||||||
|
**/
|
||||||
|
static void adis16204_poll_func_th(struct iio_dev *indio_dev, s64 timestamp)
|
||||||
|
{
|
||||||
|
struct adis16204_state *st = iio_dev_get_devdata(indio_dev);
|
||||||
|
st->last_timestamp = timestamp;
|
||||||
|
schedule_work(&st->work_trigger_to_ring);
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* adis16204_read_ring_data() read data registers which will be placed into ring
|
||||||
|
* @dev: device associated with child of actual device (iio_dev or iio_trig)
|
||||||
|
* @rx: somewhere to pass back the value read
|
||||||
|
**/
|
||||||
|
static int adis16204_read_ring_data(struct device *dev, u8 *rx)
|
||||||
|
{
|
||||||
|
struct spi_message msg;
|
||||||
|
struct iio_dev *indio_dev = dev_get_drvdata(dev);
|
||||||
|
struct adis16204_state *st = iio_dev_get_devdata(indio_dev);
|
||||||
|
struct spi_transfer xfers[ADIS16204_OUTPUTS + 1];
|
||||||
|
int ret;
|
||||||
|
int i;
|
||||||
|
|
||||||
|
mutex_lock(&st->buf_lock);
|
||||||
|
|
||||||
|
spi_message_init(&msg);
|
||||||
|
|
||||||
|
memset(xfers, 0, sizeof(xfers));
|
||||||
|
for (i = 0; i <= ADIS16204_OUTPUTS; i++) {
|
||||||
|
xfers[i].bits_per_word = 8;
|
||||||
|
xfers[i].cs_change = 1;
|
||||||
|
xfers[i].len = 2;
|
||||||
|
xfers[i].delay_usecs = 20;
|
||||||
|
xfers[i].tx_buf = st->tx + 2 * i;
|
||||||
|
st->tx[2 * i] = ADIS16204_READ_REG(ADIS16204_SUPPLY_OUT + 2 * i);
|
||||||
|
st->tx[2 * i + 1] = 0;
|
||||||
|
if (i >= 1)
|
||||||
|
xfers[i].rx_buf = rx + 2 * (i - 1);
|
||||||
|
spi_message_add_tail(&xfers[i], &msg);
|
||||||
|
}
|
||||||
|
|
||||||
|
ret = spi_sync(st->us, &msg);
|
||||||
|
if (ret)
|
||||||
|
dev_err(&st->us->dev, "problem when burst reading");
|
||||||
|
|
||||||
|
mutex_unlock(&st->buf_lock);
|
||||||
|
|
||||||
|
return ret;
|
||||||
|
}
|
||||||
|
|
||||||
|
/* Whilst this makes a lot of calls to iio_sw_ring functions - it is to device
|
||||||
|
* specific to be rolled into the core.
|
||||||
|
*/
|
||||||
|
static void adis16204_trigger_bh_to_ring(struct work_struct *work_s)
|
||||||
|
{
|
||||||
|
struct adis16204_state *st
|
||||||
|
= container_of(work_s, struct adis16204_state,
|
||||||
|
work_trigger_to_ring);
|
||||||
|
struct iio_ring_buffer *ring = st->indio_dev->ring;
|
||||||
|
|
||||||
|
int i = 0;
|
||||||
|
s16 *data;
|
||||||
|
size_t datasize = ring->access.get_bytes_per_datum(ring);
|
||||||
|
|
||||||
|
data = kmalloc(datasize, GFP_KERNEL);
|
||||||
|
if (data == NULL) {
|
||||||
|
dev_err(&st->us->dev, "memory alloc failed in ring bh");
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (ring->scan_count)
|
||||||
|
if (adis16204_read_ring_data(&st->indio_dev->dev, st->rx) >= 0)
|
||||||
|
for (; i < ring->scan_count; i++)
|
||||||
|
data[i] = be16_to_cpup(
|
||||||
|
(__be16 *)&(st->rx[i*2]));
|
||||||
|
|
||||||
|
/* Guaranteed to be aligned with 8 byte boundary */
|
||||||
|
if (ring->scan_timestamp)
|
||||||
|
*((s64 *)(data + ((i + 3)/4)*4)) = st->last_timestamp;
|
||||||
|
|
||||||
|
ring->access.store_to(ring,
|
||||||
|
(u8 *)data,
|
||||||
|
st->last_timestamp);
|
||||||
|
|
||||||
|
iio_trigger_notify_done(st->indio_dev->trig);
|
||||||
|
kfree(data);
|
||||||
|
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
|
||||||
|
void adis16204_unconfigure_ring(struct iio_dev *indio_dev)
|
||||||
|
{
|
||||||
|
kfree(indio_dev->pollfunc);
|
||||||
|
iio_sw_rb_free(indio_dev->ring);
|
||||||
|
}
|
||||||
|
|
||||||
|
int adis16204_configure_ring(struct iio_dev *indio_dev)
|
||||||
|
{
|
||||||
|
int ret = 0;
|
||||||
|
struct adis16204_state *st = indio_dev->dev_data;
|
||||||
|
struct iio_ring_buffer *ring;
|
||||||
|
INIT_WORK(&st->work_trigger_to_ring, adis16204_trigger_bh_to_ring);
|
||||||
|
|
||||||
|
ring = iio_sw_rb_allocate(indio_dev);
|
||||||
|
if (!ring) {
|
||||||
|
ret = -ENOMEM;
|
||||||
|
return ret;
|
||||||
|
}
|
||||||
|
indio_dev->ring = ring;
|
||||||
|
/* Effectively select the ring buffer implementation */
|
||||||
|
iio_ring_sw_register_funcs(&ring->access);
|
||||||
|
ring->bpe = 2;
|
||||||
|
ring->scan_el_attrs = &adis16204_scan_el_group;
|
||||||
|
ring->scan_timestamp = true;
|
||||||
|
ring->preenable = &iio_sw_ring_preenable;
|
||||||
|
ring->postenable = &iio_triggered_ring_postenable;
|
||||||
|
ring->predisable = &iio_triggered_ring_predisable;
|
||||||
|
ring->owner = THIS_MODULE;
|
||||||
|
|
||||||
|
/* Set default scan mode */
|
||||||
|
iio_scan_mask_set(ring, iio_scan_el_in_supply.number);
|
||||||
|
iio_scan_mask_set(ring, iio_scan_el_accel_x.number);
|
||||||
|
iio_scan_mask_set(ring, iio_scan_el_accel_y.number);
|
||||||
|
iio_scan_mask_set(ring, iio_scan_el_temp.number);
|
||||||
|
iio_scan_mask_set(ring, iio_scan_el_in0.number);
|
||||||
|
|
||||||
|
ret = iio_alloc_pollfunc(indio_dev, NULL, &adis16204_poll_func_th);
|
||||||
|
if (ret)
|
||||||
|
goto error_iio_sw_rb_free;
|
||||||
|
|
||||||
|
indio_dev->modes |= INDIO_RING_TRIGGERED;
|
||||||
|
return 0;
|
||||||
|
|
||||||
|
error_iio_sw_rb_free:
|
||||||
|
iio_sw_rb_free(indio_dev->ring);
|
||||||
|
return ret;
|
||||||
|
}
|
||||||
|
|
||||||
|
int adis16204_initialize_ring(struct iio_ring_buffer *ring)
|
||||||
|
{
|
||||||
|
return iio_ring_buffer_register(ring, 0);
|
||||||
|
}
|
||||||
|
|
||||||
|
void adis16204_uninitialize_ring(struct iio_ring_buffer *ring)
|
||||||
|
{
|
||||||
|
iio_ring_buffer_unregister(ring);
|
||||||
|
}
|
||||||
|
|
@ -0,0 +1,122 @@
|
||||||
|
#include <linux/interrupt.h>
|
||||||
|
#include <linux/irq.h>
|
||||||
|
#include <linux/mutex.h>
|
||||||
|
#include <linux/device.h>
|
||||||
|
#include <linux/kernel.h>
|
||||||
|
#include <linux/sysfs.h>
|
||||||
|
#include <linux/list.h>
|
||||||
|
#include <linux/spi/spi.h>
|
||||||
|
|
||||||
|
#include "../iio.h"
|
||||||
|
#include "../sysfs.h"
|
||||||
|
#include "../trigger.h"
|
||||||
|
#include "adis16204.h"
|
||||||
|
|
||||||
|
/**
|
||||||
|
* adis16204_data_rdy_trig_poll() the event handler for the data rdy trig
|
||||||
|
**/
|
||||||
|
static int adis16204_data_rdy_trig_poll(struct iio_dev *dev_info,
|
||||||
|
int index,
|
||||||
|
s64 timestamp,
|
||||||
|
int no_test)
|
||||||
|
{
|
||||||
|
struct adis16204_state *st = iio_dev_get_devdata(dev_info);
|
||||||
|
struct iio_trigger *trig = st->trig;
|
||||||
|
|
||||||
|
iio_trigger_poll(trig, timestamp);
|
||||||
|
|
||||||
|
return IRQ_HANDLED;
|
||||||
|
}
|
||||||
|
|
||||||
|
IIO_EVENT_SH(data_rdy_trig, &adis16204_data_rdy_trig_poll);
|
||||||
|
|
||||||
|
static DEVICE_ATTR(name, S_IRUGO, iio_trigger_read_name, NULL);
|
||||||
|
|
||||||
|
static struct attribute *adis16204_trigger_attrs[] = {
|
||||||
|
&dev_attr_name.attr,
|
||||||
|
NULL,
|
||||||
|
};
|
||||||
|
|
||||||
|
static const struct attribute_group adis16204_trigger_attr_group = {
|
||||||
|
.attrs = adis16204_trigger_attrs,
|
||||||
|
};
|
||||||
|
|
||||||
|
/**
|
||||||
|
* adis16204_data_rdy_trigger_set_state() set datardy interrupt state
|
||||||
|
**/
|
||||||
|
static int adis16204_data_rdy_trigger_set_state(struct iio_trigger *trig,
|
||||||
|
bool state)
|
||||||
|
{
|
||||||
|
struct adis16204_state *st = trig->private_data;
|
||||||
|
struct iio_dev *indio_dev = st->indio_dev;
|
||||||
|
int ret = 0;
|
||||||
|
|
||||||
|
dev_dbg(&indio_dev->dev, "%s (%d)\n", __func__, state);
|
||||||
|
ret = adis16204_set_irq(&st->indio_dev->dev, state);
|
||||||
|
if (state == false) {
|
||||||
|
iio_remove_event_from_list(&iio_event_data_rdy_trig,
|
||||||
|
&indio_dev->interrupts[0]
|
||||||
|
->ev_list);
|
||||||
|
flush_scheduled_work();
|
||||||
|
} else {
|
||||||
|
iio_add_event_to_list(&iio_event_data_rdy_trig,
|
||||||
|
&indio_dev->interrupts[0]->ev_list);
|
||||||
|
}
|
||||||
|
return ret;
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* adis16204_trig_try_reen() try renabling irq for data rdy trigger
|
||||||
|
* @trig: the datardy trigger
|
||||||
|
**/
|
||||||
|
static int adis16204_trig_try_reen(struct iio_trigger *trig)
|
||||||
|
{
|
||||||
|
struct adis16204_state *st = trig->private_data;
|
||||||
|
enable_irq(st->us->irq);
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
int adis16204_probe_trigger(struct iio_dev *indio_dev)
|
||||||
|
{
|
||||||
|
int ret;
|
||||||
|
struct adis16204_state *st = indio_dev->dev_data;
|
||||||
|
|
||||||
|
st->trig = iio_allocate_trigger();
|
||||||
|
st->trig->name = kasprintf(GFP_KERNEL,
|
||||||
|
"adis16204-dev%d",
|
||||||
|
indio_dev->id);
|
||||||
|
if (!st->trig->name) {
|
||||||
|
ret = -ENOMEM;
|
||||||
|
goto error_free_trig;
|
||||||
|
}
|
||||||
|
st->trig->dev.parent = &st->us->dev;
|
||||||
|
st->trig->owner = THIS_MODULE;
|
||||||
|
st->trig->private_data = st;
|
||||||
|
st->trig->set_trigger_state = &adis16204_data_rdy_trigger_set_state;
|
||||||
|
st->trig->try_reenable = &adis16204_trig_try_reen;
|
||||||
|
st->trig->control_attrs = &adis16204_trigger_attr_group;
|
||||||
|
ret = iio_trigger_register(st->trig);
|
||||||
|
|
||||||
|
/* select default trigger */
|
||||||
|
indio_dev->trig = st->trig;
|
||||||
|
if (ret)
|
||||||
|
goto error_free_trig_name;
|
||||||
|
|
||||||
|
return 0;
|
||||||
|
|
||||||
|
error_free_trig_name:
|
||||||
|
kfree(st->trig->name);
|
||||||
|
error_free_trig:
|
||||||
|
iio_free_trigger(st->trig);
|
||||||
|
|
||||||
|
return ret;
|
||||||
|
}
|
||||||
|
|
||||||
|
void adis16204_remove_trigger(struct iio_dev *indio_dev)
|
||||||
|
{
|
||||||
|
struct adis16204_state *state = indio_dev->dev_data;
|
||||||
|
|
||||||
|
iio_trigger_unregister(state->trig);
|
||||||
|
kfree(state->trig->name);
|
||||||
|
iio_free_trigger(state->trig);
|
||||||
|
}
|
||||||
Loading…
Reference in New Issue