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staging: iio: new adis16201 driver
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IIO driver for dual Axis Accelerometer/inclinometer adis16201 parts.

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>
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Barry Song authored and Greg Kroah-Hartman committed Nov 9, 2010
1 parent 6f125f1 commit f7fe1d1
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9 changes: 9 additions & 0 deletions drivers/staging/iio/accel/Kconfig
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#
comment "Accelerometers"

config ADIS16201
tristate "Analog Devices ADIS16201 Dual-Axis Digital Inclinometer and Accelerometer"
depends on SPI
select IIO_TRIGGER if IIO_RING_BUFFER
select IIO_SW_RING if IIO_RING_BUFFER
help
Say yes here to build support for Analog Devices adis16201 dual-axis
digital inclinometer and accelerometer.

config ADIS16209
tristate "Analog Devices ADIS16209 Dual-Axis Digital Inclinometer and Accelerometer"
depends on SPI
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4 changes: 4 additions & 0 deletions drivers/staging/iio/accel/Makefile
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# Makefile for industrial I/O accelerometer drivers
#

adis16201-y := adis16201_core.o
adis16201-$(CONFIG_IIO_RING_BUFFER) += adis16201_ring.o adis16201_trigger.o
obj-$(CONFIG_ADIS16201) += adis16201.o

adis16209-y := adis16209_core.o
adis16209-$(CONFIG_IIO_RING_BUFFER) += adis16209_ring.o adis16209_trigger.o
obj-$(CONFIG_ADIS16209) += adis16209.o
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150 changes: 150 additions & 0 deletions drivers/staging/iio/accel/adis16201.h
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#ifndef SPI_ADIS16201_H_
#define SPI_ADIS16201_H_

#define ADIS16201_STARTUP_DELAY 220 /* ms */

#define ADIS16201_READ_REG(a) a
#define ADIS16201_WRITE_REG(a) ((a) | 0x80)

#define ADIS16201_FLASH_CNT 0x00 /* Flash memory write count */
#define ADIS16201_SUPPLY_OUT 0x02 /* Output, power supply */
#define ADIS16201_XACCL_OUT 0x04 /* Output, x-axis accelerometer */
#define ADIS16201_YACCL_OUT 0x06 /* Output, y-axis accelerometer */
#define ADIS16201_AUX_ADC 0x08 /* Output, auxiliary ADC input */
#define ADIS16201_TEMP_OUT 0x0A /* Output, temperature */
#define ADIS16201_XINCL_OUT 0x0C /* Output, x-axis inclination */
#define ADIS16201_YINCL_OUT 0x0E /* Output, y-axis inclination */
#define ADIS16201_XACCL_OFFS 0x10 /* Calibration, x-axis acceleration offset */
#define ADIS16201_YACCL_OFFS 0x12 /* Calibration, y-axis acceleration offset */
#define ADIS16201_XACCL_SCALE 0x14 /* x-axis acceleration scale factor */
#define ADIS16201_YACCL_SCALE 0x16 /* y-axis acceleration scale factor */
#define ADIS16201_XINCL_OFFS 0x18 /* Calibration, x-axis inclination offset */
#define ADIS16201_YINCL_OFFS 0x1A /* Calibration, y-axis inclination offset */
#define ADIS16201_XINCL_SCALE 0x1C /* x-axis inclination scale factor */
#define ADIS16201_YINCL_SCALE 0x1E /* y-axis inclination scale factor */
#define ADIS16201_ALM_MAG1 0x20 /* Alarm 1 amplitude threshold */
#define ADIS16201_ALM_MAG2 0x22 /* Alarm 2 amplitude threshold */
#define ADIS16201_ALM_SMPL1 0x24 /* Alarm 1, sample period */
#define ADIS16201_ALM_SMPL2 0x26 /* Alarm 2, sample period */
#define ADIS16201_ALM_CTRL 0x28 /* Alarm control */
#define ADIS16201_AUX_DAC 0x30 /* Auxiliary DAC data */
#define ADIS16201_GPIO_CTRL 0x32 /* General-purpose digital input/output control */
#define ADIS16201_MSC_CTRL 0x34 /* Miscellaneous control */
#define ADIS16201_SMPL_PRD 0x36 /* Internal sample period (rate) control */
#define ADIS16201_AVG_CNT 0x38 /* Operation, filter configuration */
#define ADIS16201_SLP_CNT 0x3A /* Operation, sleep mode control */
#define ADIS16201_DIAG_STAT 0x3C /* Diagnostics, system status register */
#define ADIS16201_GLOB_CMD 0x3E /* Operation, system command register */

#define ADIS16201_OUTPUTS 7

/* MSC_CTRL */
#define ADIS16201_MSC_CTRL_SELF_TEST_EN (1 << 8) /* Self-test enable */
#define ADIS16201_MSC_CTRL_DATA_RDY_EN (1 << 2) /* Data-ready enable: 1 = enabled, 0 = disabled */
#define ADIS16201_MSC_CTRL_ACTIVE_HIGH (1 << 1) /* Data-ready polarity: 1 = active high, 0 = active low */
#define ADIS16201_MSC_CTRL_DATA_RDY_DIO1 (1 << 0) /* Data-ready line selection: 1 = DIO1, 0 = DIO0 */

/* DIAG_STAT */
#define ADIS16201_DIAG_STAT_ALARM2 (1<<9) /* Alarm 2 status: 1 = alarm active, 0 = alarm inactive */
#define ADIS16201_DIAG_STAT_ALARM1 (1<<8) /* Alarm 1 status: 1 = alarm active, 0 = alarm inactive */
#define ADIS16201_DIAG_STAT_SPI_FAIL (1<<3) /* SPI communications failure */
#define ADIS16201_DIAG_STAT_FLASH_UPT (1<<2) /* Flash update failure */
#define ADIS16201_DIAG_STAT_POWER_HIGH (1<<1) /* Power supply above 3.625 V */
#define ADIS16201_DIAG_STAT_POWER_LOW (1<<0) /* Power supply below 3.15 V */

/* GLOB_CMD */
#define ADIS16201_GLOB_CMD_SW_RESET (1<<7)
#define ADIS16201_GLOB_CMD_FACTORY_CAL (1<<1)

#define ADIS16201_MAX_TX 14
#define ADIS16201_MAX_RX 14

#define ADIS16201_ERROR_ACTIVE (1<<14)

/**
* struct adis16201_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 adis16201_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 adis16201_set_irq(struct device *dev, bool enable);

#ifdef CONFIG_IIO_RING_BUFFER
enum adis16201_scan {
ADIS16201_SCAN_SUPPLY,
ADIS16201_SCAN_ACC_X,
ADIS16201_SCAN_ACC_Y,
ADIS16201_SCAN_AUX_ADC,
ADIS16201_SCAN_TEMP,
ADIS16201_SCAN_INCLI_X,
ADIS16201_SCAN_INCLI_Y,
};

void adis16201_remove_trigger(struct iio_dev *indio_dev);
int adis16201_probe_trigger(struct iio_dev *indio_dev);

ssize_t adis16201_read_data_from_ring(struct device *dev,
struct device_attribute *attr,
char *buf);

int adis16201_configure_ring(struct iio_dev *indio_dev);
void adis16201_unconfigure_ring(struct iio_dev *indio_dev);

int adis16201_initialize_ring(struct iio_ring_buffer *ring);
void adis16201_uninitialize_ring(struct iio_ring_buffer *ring);
#else /* CONFIG_IIO_RING_BUFFER */

static inline void adis16201_remove_trigger(struct iio_dev *indio_dev)
{
}

static inline int adis16201_probe_trigger(struct iio_dev *indio_dev)
{
return 0;
}

static inline ssize_t
adis16201_read_data_from_ring(struct device *dev,
struct device_attribute *attr,
char *buf)
{
return 0;
}

static int adis16201_configure_ring(struct iio_dev *indio_dev)
{
return 0;
}

static inline void adis16201_unconfigure_ring(struct iio_dev *indio_dev)
{
}

static inline int adis16201_initialize_ring(struct iio_ring_buffer *ring)
{
return 0;
}

static inline void adis16201_uninitialize_ring(struct iio_ring_buffer *ring)
{
}

#endif /* CONFIG_IIO_RING_BUFFER */
#endif /* SPI_ADIS16201_H_ */
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