Modified: trunk/drivers/staging/iio/accel/accel.h (8668 => 8669)
--- trunk/drivers/staging/iio/accel/accel.h 2010-04-26 15:43:04 UTC (rev 8668)
+++ trunk/drivers/staging/iio/accel/accel.h 2010-04-27 08:16:03 UTC (rev 8669)
@@ -3,6 +3,9 @@
/* Accelerometer types of attribute */
+#define IIO_DEV_ATTR_ACCEL_OFFSET(_mode, _show, _store, _addr) \
+ IIO_DEVICE_ATTR(accel_offset, _mode, _show, _store, _addr)
+
#define IIO_DEV_ATTR_ACCEL_X_OFFSET(_mode, _show, _store, _addr) \
IIO_DEVICE_ATTR(accel_x_offset, _mode, _show, _store, _addr)
@@ -21,6 +24,9 @@
#define IIO_DEV_ATTR_ACCEL_Z_GAIN(_mode, _show, _store, _addr) \
IIO_DEVICE_ATTR(accel_z_gain, _mode, _show, _store, _addr)
+#define IIO_DEV_ATTR_ACCEL(_show, _addr) \
+ IIO_DEVICE_ATTR(accel, S_IRUGO, _show, NULL, _addr)
+
#define IIO_DEV_ATTR_ACCEL_X(_show, _addr) \
IIO_DEVICE_ATTR(accel_x, S_IRUGO, _show, NULL, _addr)
@@ -30,6 +36,9 @@
#define IIO_DEV_ATTR_ACCEL_Z(_show, _addr) \
IIO_DEVICE_ATTR(accel_z, S_IRUGO, _show, NULL, _addr)
+#define IIO_DEV_ATTR_ACCEL_PEAK(_show, _addr) \
+ IIO_DEVICE_ATTR(accel_peak, S_IRUGO, _show, NULL, _addr)
+
/* Thresholds are somewhat chip dependent - may need quite a few defs here */
/* For unified thresholds (shared across all directions */
Added: trunk/drivers/staging/iio/accel/adis16220.h (0 => 8669)
--- trunk/drivers/staging/iio/accel/adis16220.h (rev 0)
+++ trunk/drivers/staging/iio/accel/adis16220.h 2010-04-27 08:16:03 UTC (rev 8669)
@@ -0,0 +1,188 @@
+#ifndef SPI_ADIS16220_H_
+#define SPI_ADIS16220_H_
+
+#define ADIS16220_STARTUP_DELAY 220 /* ms */
+
+#define ADIS16220_READ_REG(a) a
+#define ADIS16220_WRITE_REG(a) ((a) | 0x80)
+
+#define ADIS16220_FLASH_CNT 0x00 /* Flash memory write count */
+#define ADIS16220_ACCL_NULL 0x02 /* Control, acceleration offset adjustment control */
+#define ADIS16220_AIN1_NULL 0x04 /* Control, AIN1 offset adjustment control */
+#define ADIS16220_AIN2_NULL 0x06 /* Control, AIN2 offset adjustment control */
+#define ADIS16220_CAPT_SUPPLY 0x0A /* Output, power supply during capture */
+#define ADIS16220_CAPT_TEMP 0x0C /* Output, temperature during capture */
+#define ADIS16220_CAPT_PEAKA 0x0E /* Output, peak acceleration during capture */
+#define ADIS16220_CAPT_PEAK1 0x10 /* Output, peak AIN1 level during capture */
+#define ADIS16220_CAPT_PEAK2 0x12 /* Output, peak AIN2 level during capture */
+#define ADIS16220_CAPT_BUFA 0x14 /* Output, capture buffer for acceleration */
+#define ADIS16220_CAPT_BUF1 0x16 /* Output, capture buffer for AIN1 */
+#define ADIS16220_CAPT_BUF2 0x18 /* Output, capture buffer for AIN2 */
+#define ADIS16220_CAPT_PNTR 0x1A /* Control, capture buffer address pointer */
+#define ADIS16220_CAPT_CTRL 0x1C /* Control, capture control register */
+#define ADIS16220_CAPT_PRD 0x1E /* Control, capture period (automatic mode) */
+#define ADIS16220_ALM_MAGA 0x20 /* Control, Alarm A, acceleration peak threshold */
+#define ADIS16220_ALM_MAG1 0x22 /* Control, Alarm 1, AIN1 peak threshold */
+#define ADIS16220_ALM_MAG2 0x24 /* Control, Alarm 2, AIN2 peak threshold */
+#define ADIS16220_ALM_MAGS 0x26 /* Control, Alarm S, peak threshold */
+#define ADIS16220_ALM_CTRL 0x28 /* Control, alarm configuration register */
+#define ADIS16220_GPIO_CTRL 0x32 /* Control, general I/O configuration */
+#define ADIS16220_MSC_CTRL 0x34 /* Control, self-test control, AIN configuration */
+#define ADIS16220_DIO_CTRL 0x36 /* Control, digital I/O configuration */
+#define ADIS16220_AVG_CNT 0x38 /* Control, filter configuration */
+#define ADIS16220_DIAG_STAT 0x3C /* Status, system status */
+#define ADIS16220_GLOB_CMD 0x3E /* Control, system commands */
+#define ADIS16220_ST_DELTA 0x40 /* Status, self-test response */_
+#define ADIS16220_LOT_ID1 0x52 /* Lot Identification Code 1 */
+#define ADIS16220_LOT_ID2 0x54 /* Lot Identification Code 2 */
+#define ADIS16220_PROD_ID 0x56 /* Product identifier; convert to decimal = 16220 */
+#define ADIS16220_SERIAL_NUM 0x58 /* Serial number */
+
+/* MSC_CTRL */
+#define ADIS16220_MSC_CTRL_SELF_TEST_EN (1 << 8)
+#define ADIS16220_MSC_CTRL_POWER_SUP_COM_AIN1 (1 << 1)
+#define ADIS16220_MSC_CTRL_POWER_SUP_COM_AIN2 (1 << 0)
+
+/* DIO_CTRL */
+#define ADIS16220_MSC_CTRL_DIO2_BUSY_IND (3<<4)
+#define ADIS16220_MSC_CTRL_DIO1_BUSY_IND (3<<2)
+#define ADIS16220_MSC_CTRL_DIO2_ACT_HIGH (1<<1)
+#define ADIS16220_MSC_CTRL_DIO1_ACT_HIGH (1<<0)
+
+/* DIAG_STAT */
+#define ADIS16220_DIAG_STAT_ALM_MAG2 (1<<14) /* AIN2 sample > ALM_MAG2 */
+#define ADIS16220_DIAG_STAT_ALM_MAG1 (1<<13) /* AIN1 sample > ALM_MAG1 */
+#define ADIS16220_DIAG_STAT_ALM_MAGA (1<<12) /* Acceleration sample > ALM_MAGA */
+#define ADIS16220_DIAG_STAT_ALM_MAGS (1<<11) /* Error condition programmed into ALM_MAGS[11:0] and
+ ALM_CTRL[5:4] is true */
+#define ADIS16220_DIAG_STAT_PEAK_AIN2 (1<<10) /* |Peak value in AIN2 data capture| > ALM_MAG2 */
+#define ADIS16220_DIAG_STAT_PEAK_AIN1 (1<<9) /* |Peak value in AIN1 data capture| > ALM_MAG1 */
+#define ADIS16220_DIAG_STAT_PEAK_ACCEL (1<<8) /* |Peak value in acceleration data capture| > ALM_MAGA */
+#define ADIS16220_DIAG_STAT_DATA_RDY (1<<7) /* Data ready, capture complete */
+#define ADIS16220_DIAG_STAT_FLASH_CHK (1<<6)
+#define ADIS16220_DIAG_STAT_SELF_TEST (1<<5)
+#define ADIS16220_DIAG_STAT_VIOLATION (1<<4) /* Capture period violation/interruption */
+#define ADIS16220_DIAG_STAT_SPI_FAIL (1<<3) /* SPI communications failure */
+#define ADIS16220_DIAG_STAT_FLASH_UPT (1<<2) /* Flash update failure */
+#define ADIS16220_DIAG_STAT_POWER_HIGH (1<<1) /* Power supply above 3.625 V */
+#define ADIS16220_DIAG_STAT_POWER_LOW (1<<0) /* Power supply below 3.15 V */
+
+/* GLOB_CMD */
+#define ADIS16220_GLOB_CMD_SW_RESET (1<<7)
+#define ADIS16220_GLOB_CMD_SELF_TEST (1<<2)
+#define ADIS16220_GLOB_CMD_PWR_DOWN (1<<1)
+
+#define ADIS16220_MAX_TX 24
+#define ADIS16220_MAX_RX 24
+
+#define ADIS16220_SPI_SLOW (u32)(300 * 1000)
+#define ADIS16220_SPI_BURST (u32)(1000 * 1000)
+#define ADIS16220_SPI_FAST (u32)(2000 * 1000)
+
+/**
+ * struct adis16220_state - device instance specific data
+ * @us: actual spi_device
+ * @work_trigger_to_ring: bh for triggered event handling
+ * @work_cont_thresh: CLEAN
+ * @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 adis16220_state {
+ struct spi_device *us;
+ struct work_struct work_trigger_to_ring;
+ struct iio_work_cont work_cont_thresh;
+ s64 last_timestamp;
+ struct iio_dev *indio_dev;
+ struct iio_trigger *trig;
+ u8 *tx;
+ u8 *rx;
+ struct mutex buf_lock;
+};
+
+int adis16220_spi_write_reg_8(struct device *dev,
+ u8 reg_address,
+ u8 val);
+
+int adis16220_spi_read_burst(struct device *dev, u8 *rx);
+
+int adis16220_spi_read_sequence(struct device *dev,
+ u8 *tx, u8 *rx, int num);
+
+int adis16220_set_irq(struct device *dev, bool enable);
+
+int adis16220_reset(struct device *dev);
+
+int adis16220_stop_device(struct device *dev);
+
+int adis16220_check_status(struct device *dev);
+
+#ifdef CONFIG_IIO_RING_BUFFER
+/* At the moment triggers are only used for ring buffer
+ * filling. This may change!
+ */
+
+enum adis16220_scan {
+ ADIS16220_SCAN_SUPPLY,
+ ADIS16220_SCAN_GYRO,
+ ADIS16220_SCAN_TEMP,
+ ADIS16220_SCAN_ADC_0,
+ ADIS16220_SCAN_ADC_1,
+};
+
+void adis16220_remove_trigger(struct iio_dev *indio_dev);
+int adis16220_probe_trigger(struct iio_dev *indio_dev);
+
+ssize_t adis16220_read_data_from_ring(struct device *dev,
+ struct device_attribute *attr,
+ char *buf);
+
+
+int adis16220_configure_ring(struct iio_dev *indio_dev);
+void adis16220_unconfigure_ring(struct iio_dev *indio_dev);
+
+int adis16220_initialize_ring(struct iio_ring_buffer *ring);
+void adis16220_uninitialize_ring(struct iio_ring_buffer *ring);
+#else /* CONFIG_IIO_RING_BUFFER */
+
+static inline void adis16220_remove_trigger(struct iio_dev *indio_dev)
+{
+}
+
+static inline int adis16220_probe_trigger(struct iio_dev *indio_dev)
+{
+ return 0;
+}
+
+static inline ssize_t
+adis16220_read_data_from_ring(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ return 0;
+}
+
+static int adis16220_configure_ring(struct iio_dev *indio_dev)
+{
+ return 0;
+}
+
+static inline void adis16220_unconfigure_ring(struct iio_dev *indio_dev)
+{
+}
+
+static inline int adis16220_initialize_ring(struct iio_ring_buffer *ring)
+{
+ return 0;
+}
+
+static inline void adis16220_uninitialize_ring(struct iio_ring_buffer *ring)
+{
+}
+
+#endif /* CONFIG_IIO_RING_BUFFER */
+#endif /* SPI_ADIS16220_H_ */
Added: trunk/drivers/staging/iio/accel/adis16220_core.c (0 => 8669)
--- trunk/drivers/staging/iio/accel/adis16220_core.c (rev 0)
+++ trunk/drivers/staging/iio/accel/adis16220_core.c 2010-04-27 08:16:03 UTC (rev 8669)
@@ -0,0 +1,634 @@
+/*
+ * ADIS16220 Programmable Digital Vibration Sensor driver
+ *
+ * Copyright 2010 Analog Devices Inc.
+ *
+ * Licensed under the GPL-2 or later.
+ */
+
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/gpio.h>
+#include <linux/delay.h>
+#include <linux/mutex.h>
+#include <linux/device.h>
+#include <linux/kernel.h>
+#include <linux/spi/spi.h>
+
+#include <linux/sysfs.h>
+#include <linux/list.h>
+
+#include "../iio.h"
+#include "../sysfs.h"
+#include "accel.h"
+#include "../imu/volt.h"
+#include "../adc/adc.h"
+
+#include "adis16220.h"
+
+#define DRIVER_NAME "adis16220"
+
+/**
+ * adis16220_spi_write_reg_8() - write single byte to a register
+ * @dev: device associated with child of actual device (iio_dev or iio_trig)
+ * @reg_address: the address of the register to be written
+ * @val: the value to write
+ **/
+int adis16220_spi_write_reg_8(struct device *dev,
+ u8 reg_address,
+ u8 val)
+{
+ int ret;
+ struct iio_dev *indio_dev = dev_get_drvdata(dev);
+ struct adis16220_state *st = iio_dev_get_devdata(indio_dev);
+
+ mutex_lock(&st->buf_lock);
+ st->tx[0] = ADIS16220_WRITE_REG(reg_address);
+ st->tx[1] = val;
+
+ ret = spi_write(st->us, st->tx, 2);
+ mutex_unlock(&st->buf_lock);
+
+ return ret;
+}
+
+/**
+ * adis16220_spi_write_reg_16() - write 2 bytes to a pair of registers
+ * @dev: device associated with child of actual device (iio_dev or iio_trig)
+ * @reg_address: the address of the lower of the two registers. Second register
+ * is assumed to have address one greater.
+ * @val: value to be written
+ **/
+static int adis16220_spi_write_reg_16(struct device *dev,
+ u8 lower_reg_address,
+ u16 value)
+{
+ int ret;
+ struct spi_message msg;
+ struct iio_dev *indio_dev = dev_get_drvdata(dev);
+ struct adis16220_state *st = iio_dev_get_devdata(indio_dev);
+ struct spi_transfer xfers[] = {
+ {
+ .tx_buf = st->tx,
+ .bits_per_word = 8,
+ .len = 2,
+ .cs_change = 1,
+ }, {
+ .tx_buf = st->tx + 2,
+ .bits_per_word = 8,
+ .len = 2,
+ .cs_change = 1,
+ },
+ };
+
+ mutex_lock(&st->buf_lock);
+ st->tx[0] = ADIS16220_WRITE_REG(lower_reg_address);
+ st->tx[1] = value & 0xFF;
+ st->tx[2] = ADIS16220_WRITE_REG(lower_reg_address + 1);
+ st->tx[3] = (value >> 8) & 0xFF;
+
+ spi_message_init(&msg);
+ spi_message_add_tail(&xfers[0], &msg);
+ spi_message_add_tail(&xfers[1], &msg);
+ ret = spi_sync(st->us, &msg);
+ mutex_unlock(&st->buf_lock);
+
+ return ret;
+}
+
+/**
+ * adis16220_spi_read_reg_16() - read 2 bytes from a 16-bit register
+ * @dev: device associated with child of actual device (iio_dev or iio_trig)
+ * @reg_address: the address of the lower of the two registers. Second register
+ * is assumed to have address one greater.
+ * @val: somewhere to pass back the value read
+ **/
+static int adis16220_spi_read_reg_16(struct device *dev,
+ u8 lower_reg_address,
+ u16 *val)
+{
+ struct spi_message msg;
+ struct iio_dev *indio_dev = dev_get_drvdata(dev);
+ struct adis16220_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,
+ }, {
+ .rx_buf = st->rx,
+ .bits_per_word = 8,
+ .len = 2,
+ .cs_change = 1,
+ },
+ };
+
+ mutex_lock(&st->buf_lock);
+ st->tx[0] = ADIS16220_READ_REG(lower_reg_address);
+ st->tx[1] = 0;
+ st->tx[2] = 0;
+ st->tx[3] = 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;
+}
+
+/**
+ * adis16220_spi_read_sequence() - read a sequence of 16-bit registers
+ * @dev: device associated with child of actual device (iio_dev or iio_trig)
+ * @tx: register addresses in bytes 0,2,4,6... (min size is 2*num bytes)
+ * @rx: somewhere to pass back the value read (min size is 2*num bytes)
+ **/
+int adis16220_spi_read_sequence(struct device *dev,
+ u8 *tx, u8 *rx, int num)
+{
+ struct spi_message msg;
+ struct spi_transfer *xfers;
+ struct iio_dev *indio_dev = dev_get_drvdata(dev);
+ struct adis16220_state *st = iio_dev_get_devdata(indio_dev);
+ int ret, i;
+
+ xfers = kzalloc(num + 1, GFP_KERNEL);
+ if (xfers == NULL) {
+ dev_err(&st->us->dev, "memory alloc failed");
+ ret = -ENOMEM;
+ goto error_ret;
+ }
+
+ /* tx: |add1|addr2|addr3|...|addrN |zero|
+ * rx: |zero|res1 |res2 |...|resN-1|resN| */
+ spi_message_init(&msg);
+ for (i = 0; i < num + 1; i++) {
+ if (i > 0)
+ xfers[i].rx_buf = st->rx + 2*(i - 1);
+ if (i < num)
+ xfers[i].tx_buf = st->tx + 2*i;
+ xfers[i].bits_per_word = 8;
+ xfers[i].len = 2;
+ xfers[i].cs_change = 1;
+ spi_message_add_tail(&xfers[i], &msg);
+ }
+
+ mutex_lock(&st->buf_lock);
+
+ ret = spi_sync(st->us, &msg);
+ if (ret)
+ dev_err(&st->us->dev, "problem when reading sequence");
+
+ mutex_unlock(&st->buf_lock);
+ kfree(xfers);
+
+error_ret:
+ return ret;
+}
+
+static ssize_t adis16220_spi_read_signed(struct device *dev,
+ struct device_attribute *attr,
+ char *buf,
+ unsigned bits)
+{
+ int ret;
+ s16 val = 0;
+ unsigned shift = 16 - bits;
+ struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
+
+ ret = adis16220_spi_read_reg_16(dev, this_attr->address, (u16 *)&val);
+ if (ret)
+ return ret;
+
+ val = ((s16)(val << shift) >> shift);
+ return sprintf(buf, "%d\n", val);
+}
+
+static ssize_t adis16220_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 = adis16220_spi_read_reg_16(dev, this_attr->address, &val);
+ if (ret)
+ return ret;
+
+ return sprintf(buf, "%u\n", val & 0x0FFF);
+}
+
+static ssize_t adis16220_read_16bit(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct iio_dev *indio_dev = dev_get_drvdata(dev);
+ ssize_t ret;
+
+ /* Take the iio_dev status lock */
+ mutex_lock(&indio_dev->mlock);
+ ret = adis16220_spi_read_signed(dev, attr, buf, 16);
+ mutex_unlock(&indio_dev->mlock);
+
+ return ret;
+}
+
+static ssize_t adis16220_read_12bit_signed(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct iio_dev *indio_dev = dev_get_drvdata(dev);
+ ssize_t ret;
+
+ /* Take the iio_dev status lock */
+ mutex_lock(&indio_dev->mlock);
+ ret = adis16220_spi_read_signed(dev, attr, buf, 12);
+ mutex_unlock(&indio_dev->mlock);
+
+ return ret;
+}
+
+static ssize_t adis16220_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 = adis16220_spi_write_reg_16(dev, this_attr->address, val);
+
+error_ret:
+ return ret ? ret : len;
+}
+
+static ssize_t adis16220_write_reset(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t len)
+{
+ if (len < 1)
+ return -1;
+ switch (buf[0]) {
+ case '1':
+ case 'y':
+ case 'Y':
+ return adis16220_reset(dev);
+ }
+ return -1;
+}
+
+int adis16220_set_irq(struct device *dev, bool enable)
+{
+ int ret;
+ u16 msc;
+ ret = adis16220_spi_read_reg_16(dev, ADIS16220_MSC_CTRL, &msc);
+ if (ret)
+ goto error_ret;
+
+ msc |= ADIS16220_MSC_CTRL_DIO1_ACT_HIGH;
+ if (enable)
+ msc |= ADIS16220_MSC_CTRL_DIO1_BUSY_IND;
+ else
+ msc &= ~ADIS16220_MSC_CTRL_DIO1_BUSY_IND;
+
+ ret = adis16220_spi_write_reg_16(dev, ADIS16220_MSC_CTRL, msc);
+ if (ret)
+ goto error_ret;
+
+error_ret:
+ return ret;
+}
+
+int adis16220_reset(struct device *dev)
+{
+ int ret;
+ ret = adis16220_spi_write_reg_8(dev,
+ ADIS16220_GLOB_CMD,
+ ADIS16220_GLOB_CMD_SW_RESET);
+ if (ret)
+ dev_err(dev, "problem resetting device");
+
+ return ret;
+}
+
+int adis16220_self_test(struct device *dev)
+{
+ int ret;
+ ret = adis16220_spi_write_reg_16(dev,
+ ADIS16220_MSC_CTRL,
+ ADIS16220_MSC_CTRL_SELF_TEST_EN);
+ if (ret) {
+ dev_err(dev, "problem starting self test");
+ goto err_ret;
+ }
+
+ adis16220_check_status(dev);
+
+err_ret:
+ return ret;
+}
+
+int adis16220_check_status(struct device *dev)
+{
+ u16 status;
+ int ret;
+
+ ret = adis16220_spi_read_reg_16(dev, ADIS16220_DIAG_STAT, &status);
+
+ if (ret < 0) {
+ dev_err(dev, "Reading status failed\n");
+ goto error_ret;
+ }
+ ret = status;
+ if (status & ADIS16220_DIAG_STAT_ALM_MAG2)
+ dev_err(dev, "AIN2 sample > ALM_MAG2\n");
+ if (status & ADIS16220_DIAG_STAT_ALM_MAG1)
+ dev_err(dev, "AIN1 sample > ALM_MAG1\n");
+ if (status & ADIS16220_DIAG_STAT_ALM_MAGA)
+ dev_err(dev, "Acceleration sample > ALM_MAGA\n");
+ if (status & ADIS16220_DIAG_STAT_ALM_MAGS)
+ dev_err(dev, "Error condition programmed into ALM_MAGS[11:0]\n");
+ if (status & ADIS16220_DIAG_STAT_PEAK_AIN2)
+ dev_err(dev, "|Peak value in AIN2 data capture| > ALM_MAG2\n");
+ if (status & ADIS16220_DIAG_STAT_PEAK_AIN1)
+ dev_err(dev, "|Peak value in AIN1 data capture| > ALM_MAG1\n");
+ if (status & ADIS16220_DIAG_STAT_PEAK_ACCEL)
+ dev_err(dev, "|Peak value in acceleration data capture| > ALM_MAGA\n");
+ if (status & ADIS16220_DIAG_STAT_VIOLATION)
+ dev_err(dev, "Capture period violation/interruption\n");
+ if (status & ADIS16220_DIAG_STAT_SPI_FAIL)
+ dev_err(dev, "SPI failure\n");
+ if (status & ADIS16220_DIAG_STAT_FLASH_UPT)
+ dev_err(dev, "Flash update failed\n");
+ if (status & ADIS16220_DIAG_STAT_POWER_HIGH)
+ dev_err(dev, "Power supply above 5.25V\n");
+ if (status & ADIS16220_DIAG_STAT_POWER_LOW)
+ dev_err(dev, "Power supply below 4.75V\n");
+
+error_ret:
+ return ret;
+}
+
+static int adis16220_initial_setup(struct adis16220_state *st)
+{
+ int ret;
+ struct device *dev = &st->indio_dev->dev;
+
+ /* Disable IRQ */
+ ret = adis16220_set_irq(dev, false);
+ if (ret) {
+ dev_err(dev, "disable irq failed");
+ goto err_ret;
+ }
+
+ /* Do self test */
+
+ /* Read status register to check the result */
+ ret = adis16220_check_status(dev);
+ if (ret) {
+ adis16220_reset(dev);
+ dev_err(dev, "device not playing ball -> reset");
+ msleep(ADIS16220_STARTUP_DELAY);
+ ret = adis16220_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_VOLT(supply, adis16220_read_12bit_unsigned,
+ ADIS16220_CAPT_SUPPLY);
+static IIO_CONST_ATTR(volt_supply_scale, "0.0012207");
+static IIO_DEV_ATTR_ACCEL(adis16220_read_16bit,
+ ADIS16220_CAPT_BUFA);
+static IIO_DEV_ATTR_ACCEL_PEAK(adis16220_read_16bit,
+ ADIS16220_CAPT_PEAKA);
+static IIO_DEV_ATTR_ACCEL_OFFSET(S_IWUSR | S_IRUGO,
+ adis16220_read_16bit,
+ adis16220_write_16bit,
+ ADIS16220_ACCL_NULL);
+static IIO_DEV_ATTR_TEMP(adis16220_read_12bit_signed);
+static IIO_CONST_ATTR(temp_offset, "25 K");
+static IIO_CONST_ATTR(temp_scale, "-0.47 K");
+
+static IIO_DEV_ATTR_ADC(1, adis16220_read_16bit, ADIS16220_CAPT_BUF1);
+static IIO_DEV_ATTR_ADC(2, adis16220_read_16bit, ADIS16220_CAPT_BUF2);
+
+static IIO_DEV_ATTR_RESET(adis16220_write_reset);
+
+static IIO_CONST_ATTR_AVAIL_SAMP_FREQ("100200");
+
+static IIO_CONST_ATTR(name, "adis16220");
+
+static struct attribute *adis16220_event_attributes[] = {
+ NULL
+};
+
+static struct attribute_group adis16220_event_attribute_group = {
+ .attrs = adis16220_event_attributes,
+};
+
+static struct attribute *adis16220_attributes[] = {
+ &iio_dev_attr_volt_supply.dev_attr.attr,
+ &iio_const_attr_volt_supply_scale.dev_attr.attr,
+ &iio_dev_attr_accel.dev_attr.attr,
+ &iio_dev_attr_accel_offset.dev_attr.attr,
+ &iio_dev_attr_accel_peak.dev_attr.attr,
+ &iio_dev_attr_temp.dev_attr.attr,
+ &iio_dev_attr_adc_1.dev_attr.attr,
+ &iio_dev_attr_adc_2.dev_attr.attr,
+ &iio_const_attr_temp_offset.dev_attr.attr,
+ &iio_const_attr_temp_scale.dev_attr.attr,
+ &iio_const_attr_available_sampling_frequency.dev_attr.attr,
+ &iio_dev_attr_reset.dev_attr.attr,
+ &iio_const_attr_name.dev_attr.attr,
+ NULL
+};
+
+static const struct attribute_group adis16220_attribute_group = {
+ .attrs = adis16220_attributes,
+};
+
+static int __devinit adis16220_probe(struct spi_device *spi)
+{
+ int ret, regdone = 0;
+ struct adis16220_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)*ADIS16220_MAX_RX, GFP_KERNEL);
+ if (st->rx == NULL) {
+ ret = -ENOMEM;
+ goto error_free_st;
+ }
+ st->tx = kzalloc(sizeof(*st->tx)*ADIS16220_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 = &adis16220_event_attribute_group;
+ st->indio_dev->attrs = &adis16220_attribute_group;
+ st->indio_dev->dev_data = (void *)(st);
+ st->indio_dev->driver_module = THIS_MODULE;
+ st->indio_dev->modes = INDIO_DIRECT_MODE;
+
+ ret = adis16220_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 = adis16220_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 && gpio_is_valid(irq_to_gpio(spi->irq)) > 0) {
+#if 0 /* fixme: here we should support */
+ iio_init_work_cont(&st->work_cont_thresh,
+ NULL,
+ adis16220_thresh_handler_bh_no_check,
+ 0,
+ 0,
+ st);
+#endif
+ ret = iio_register_interrupt_line(spi->irq,
+ st->indio_dev,
+ 0,
+ IRQF_TRIGGER_RISING,
+ "adis16220");
+ if (ret)
+ goto error_uninitialize_ring;
+
+ ret = adis16220_probe_trigger(st->indio_dev);
+ if (ret)
+ goto error_unregister_line;
+ }
+
+ /* Get the device into a sane initial state */
+ ret = adis16220_initial_setup(st);
+ if (ret)
+ goto error_remove_trigger;
+ return 0;
+
+error_remove_trigger:
+ if (st->indio_dev->modes & INDIO_RING_TRIGGERED)
+ adis16220_remove_trigger(st->indio_dev);
+error_unregister_line:
+ if (st->indio_dev->modes & INDIO_RING_TRIGGERED)
+ iio_unregister_interrupt_line(st->indio_dev, 0);
+error_uninitialize_ring:
+ adis16220_uninitialize_ring(st->indio_dev->ring);
+error_unreg_ring_funcs:
+ adis16220_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;
+}
+
+/* fixme, confirm ordering in this function */
+static int adis16220_remove(struct spi_device *spi)
+{
+ int ret;
+ struct adis16220_state *st = spi_get_drvdata(spi);
+ struct iio_dev *indio_dev = st->indio_dev;
+
+ ret = adis16220_stop_device(&(indio_dev->dev));
+ if (ret)
+ goto err_ret;
+
+ flush_scheduled_work();
+
+ adis16220_remove_trigger(indio_dev);
+ if (spi->irq && gpio_is_valid(irq_to_gpio(spi->irq)) > 0)
+ iio_unregister_interrupt_line(indio_dev, 0);
+
+ adis16220_uninitialize_ring(indio_dev->ring);
+ adis16220_unconfigure_ring(indio_dev);
+ iio_device_unregister(indio_dev);
+ kfree(st->tx);
+ kfree(st->rx);
+ kfree(st);
+
+ return 0;
+
+err_ret:
+ return ret;
+}
+
+static struct spi_driver adis16220_driver = {
+ .driver = {
+ .name = "adis16220",
+ .owner = THIS_MODULE,
+ },
+ .probe = adis16220_probe,
+ .remove = __devexit_p(adis16220_remove),
+};
+
+static __init int adis16220_init(void)
+{
+ return spi_register_driver(&adis16220_driver);
+}
+module_init(adis16220_init);
+
+static __exit void adis16220_exit(void)
+{
+ spi_unregister_driver(&adis16220_driver);
+}
+module_exit(adis16220_exit);
+
+MODULE_AUTHOR("Barry Song <[email protected]>");
+MODULE_DESCRIPTION("Analog Devices ADIS16220 Programmable Digital Vibration Sensor driver");
+MODULE_LICENSE("GPL v2");
