On Thu, May 13, 2010 at 4:53 AM, Jonathan Cameron <jic23@xxxxxxxxx> wrote:
> From: Barry Song <Barry.Song@xxxxxxxxxx>
>
Thanks! Jonathan.
Signed-off-by: Barry Song <Barry.Song@xxxxxxxxxx>
> ---
> drivers/staging/iio/accel/Kconfig | 7 +
> drivers/staging/iio/accel/Makefile | 3 +
> drivers/staging/iio/accel/accel.h | 6 +
> drivers/staging/iio/accel/adis16220.h | 150 +++++++
> drivers/staging/iio/accel/adis16220_core.c | 664 ++++++++++++++++++++++++++++
> 5 files changed, 830 insertions(+), 0 deletions(-)
>
> diff --git a/drivers/staging/iio/accel/Kconfig b/drivers/staging/iio/accel/Kconfig
> index 8f3f70f..b4e57d1 100644
> --- a/drivers/staging/iio/accel/Kconfig
> +++ b/drivers/staging/iio/accel/Kconfig
> @@ -12,6 +12,13 @@ config ADIS16209
> Say yes here to build support for Analog Devices adis16209 dual-axis digital inclinometer
> and accelerometer.
>
> +config ADIS16220
> + tristate "Analog Devices ADIS16220 Programmable Digital Vibration Sensor driver"
> + depends on SPI
> + help
> + Say yes here to build support for Analog Devices adis16220 programmable
> + digital vibration sensor.
> +
> config ADIS16240
> tristate "Analog Devices ADIS16240 Programmable Impact Sensor and Recorder"
> depends on SPI
> diff --git a/drivers/staging/iio/accel/Makefile b/drivers/staging/iio/accel/Makefile
> index 0e6762c..c34b136 100644
> --- a/drivers/staging/iio/accel/Makefile
> +++ b/drivers/staging/iio/accel/Makefile
> @@ -5,6 +5,9 @@ adis16209-y := adis16209_core.o
> adis16209-$(CONFIG_IIO_RING_BUFFER) += adis16209_ring.o adis16209_trigger.o
> obj-$(CONFIG_ADIS16209) += adis16209.o
>
> +adis16220-y := adis16220_core.o
> +obj-$(CONFIG_ADIS16220) += adis16220.o
> +
> adis16240-y := adis16240_core.o
> adis16240-$(CONFIG_IIO_RING_BUFFER) += adis16240_ring.o adis16240_trigger.o
> obj-$(CONFIG_ADIS16240) += adis16240.o
> diff --git a/drivers/staging/iio/accel/accel.h b/drivers/staging/iio/accel/accel.h
> index 059209c..1b6e37f 100644
> --- a/drivers/staging/iio/accel/accel.h
> +++ b/drivers/staging/iio/accel/accel.h
> @@ -2,6 +2,9 @@
> #include "../sysfs.h"
>
> /* 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)
>
> @@ -20,6 +23,9 @@
> #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_raw, S_IRUGO, _show, NULL, _addr)
> +
> #define IIO_DEV_ATTR_ACCEL_X(_show, _addr) \
> IIO_DEVICE_ATTR(accel_x_raw, S_IRUGO, _show, NULL, _addr)
>
> diff --git a/drivers/staging/iio/accel/adis16220.h b/drivers/staging/iio/accel/adis16220.h
> new file mode 100644
> index 0000000..6b49f70
> --- /dev/null
> +++ b/drivers/staging/iio/accel/adis16220.h
> @@ -0,0 +1,150 @@
> +#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)
> +
> +/* Flash memory write count */
> +#define ADIS16220_FLASH_CNT 0x00
> +/* Control, acceleration offset adjustment control */
> +#define ADIS16220_ACCL_NULL 0x02
> +/* Control, AIN1 offset adjustment control */
> +#define ADIS16220_AIN1_NULL 0x04
> +/* Control, AIN2 offset adjustment control */
> +#define ADIS16220_AIN2_NULL 0x06
> +/* Output, power supply during capture */
> +#define ADIS16220_CAPT_SUPPLY 0x0A
> +/* Output, temperature during capture */
> +#define ADIS16220_CAPT_TEMP 0x0C
> +/* Output, peak acceleration during capture */
> +#define ADIS16220_CAPT_PEAKA 0x0E
> +/* Output, peak AIN1 level during capture */
> +#define ADIS16220_CAPT_PEAK1 0x10
> +/* Output, peak AIN2 level during capture */
> +#define ADIS16220_CAPT_PEAK2 0x12
> +/* Output, capture buffer for acceleration */
> +#define ADIS16220_CAPT_BUFA 0x14
> +/* Output, capture buffer for AIN1 */
> +#define ADIS16220_CAPT_BUF1 0x16
> +/* Output, capture buffer for AIN2 */
> +#define ADIS16220_CAPT_BUF2 0x18
> +/* Control, capture buffer address pointer */
> +#define ADIS16220_CAPT_PNTR 0x1A
> +/* Control, capture control register */
> +#define ADIS16220_CAPT_CTRL 0x1C
> +/* Control, capture period (automatic mode) */
> +#define ADIS16220_CAPT_PRD 0x1E
> +/* Control, Alarm A, acceleration peak threshold */
> +#define ADIS16220_ALM_MAGA 0x20
> +/* Control, Alarm 1, AIN1 peak threshold */
> +#define ADIS16220_ALM_MAG1 0x22
> +/* Control, Alarm 2, AIN2 peak threshold */
> +#define ADIS16220_ALM_MAG2 0x24
> +/* Control, Alarm S, peak threshold */
> +#define ADIS16220_ALM_MAGS 0x26
> +/* Control, alarm configuration register */
> +#define ADIS16220_ALM_CTRL 0x28
> +/* Control, general I/O configuration */
> +#define ADIS16220_GPIO_CTRL 0x32
> +/* Control, self-test control, AIN configuration */
> +#define ADIS16220_MSC_CTRL 0x34
> +/* Control, digital I/O configuration */
> +#define ADIS16220_DIO_CTRL 0x36
> +/* Control, filter configuration */
> +#define ADIS16220_AVG_CNT 0x38
> +/* Status, system status */
> +#define ADIS16220_DIAG_STAT 0x3C
> +/* Control, system commands */
> +#define ADIS16220_GLOB_CMD 0x3E
> +/* Status, self-test response */
> +#define ADIS16220_ST_DELTA 0x40
> +/* Lot Identification Code 1 */
> +#define ADIS16220_LOT_ID1 0x52
> +/* Lot Identification Code 2 */
> +#define ADIS16220_LOT_ID2 0x54
> +/* Product identifier; convert to decimal = 16220 */
> +#define ADIS16220_PROD_ID 0x56
> +/* Serial number */
> +#define ADIS16220_SERIAL_NUM 0x58
> +
> +#define ADIS16220_CAPTURE_SIZE 2048
> +
> +/* 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 */
> +/* AIN2 sample > ALM_MAG2 */
> +#define ADIS16220_DIAG_STAT_ALM_MAG2 (1<<14)
> +/* AIN1 sample > ALM_MAG1 */
> +#define ADIS16220_DIAG_STAT_ALM_MAG1 (1<<13)
> +/* Acceleration sample > ALM_MAGA */
> +#define ADIS16220_DIAG_STAT_ALM_MAGA (1<<12)
> +/* Error condition programmed into ALM_MAGS[11:0] and ALM_CTRL[5:4] is true */
> +#define ADIS16220_DIAG_STAT_ALM_MAGS (1<<11)
> +/* |Peak value in AIN2 data capture| > ALM_MAG2 */
> +#define ADIS16220_DIAG_STAT_PEAK_AIN2 (1<<10)
> +/* |Peak value in AIN1 data capture| > ALM_MAG1 */
> +#define ADIS16220_DIAG_STAT_PEAK_AIN1 (1<<9)
> +/* |Peak value in acceleration data capture| > ALM_MAGA */
> +#define ADIS16220_DIAG_STAT_PEAK_ACCEL (1<<8)
> +/* Data ready, capture complete */
> +#define ADIS16220_DIAG_STAT_DATA_RDY (1<<7)
> +#define ADIS16220_DIAG_STAT_FLASH_CHK (1<<6)
> +#define ADIS16220_DIAG_STAT_SELF_TEST (1<<5)
> +/* Capture period violation/interruption */
> +#define ADIS16220_DIAG_STAT_VIOLATION (1<<4)
> +/* SPI communications failure */
> +#define ADIS16220_DIAG_STAT_SPI_FAIL (1<<3)
> +/* Flash update failure */
> +#define ADIS16220_DIAG_STAT_FLASH_UPT (1<<2)
> +/* Power supply above 3.625 V */
> +#define ADIS16220_DIAG_STAT_POWER_HIGH (1<<1)
> +/* Power supply below 3.15 V */
> +#define ADIS16220_DIAG_STAT_POWER_LOW (1<<0)
> +
> +/* 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 2048
> +#define ADIS16220_MAX_RX 2048
> +
> +#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 iio_dev *indio_dev;
> + u8 *tx;
> + u8 *rx;
> + struct bin_attribute accel_bin;
> + struct bin_attribute adc1_bin;
> + struct bin_attribute adc2_bin;
> + struct mutex buf_lock;
> +};
> +
> +#endif /* SPI_ADIS16220_H_ */
> diff --git a/drivers/staging/iio/accel/adis16220_core.c b/drivers/staging/iio/accel/adis16220_core.c
> new file mode 100644
> index 0000000..8b845d9
> --- /dev/null
> +++ b/drivers/staging/iio/accel/adis16220_core.c
> @@ -0,0 +1,664 @@
> +/*
> + * 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 "../adc/adc.h"
> +
> +#include "adis16220.h"
> +
> +#define DRIVER_NAME "adis16220"
> +
> +static int adis16220_check_status(struct device *dev);
> +
> +/**
> + * 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
> + **/
> +static 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,
> + .delay_usecs = 25,
> + }, {
> + .tx_buf = st->tx + 2,
> + .bits_per_word = 8,
> + .len = 2,
> + .cs_change = 1,
> + .delay_usecs = 25,
> + },
> + };
> +
> + 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,
> + .delay_usecs = 25,
> + }, {
> + .rx_buf = st->rx,
> + .bits_per_word = 8,
> + .len = 2,
> + .cs_change = 1,
> + .delay_usecs = 25,
> + },
> + };
> +
> + 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;
> +}
> +
> +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_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 int adis16220_capture(struct device *dev)
> +{
> + int ret;
> + ret = adis16220_spi_write_reg_16(dev,
> + ADIS16220_GLOB_CMD,
> + 0xBF08); /* initiates a manual data capture */
> + if (ret)
> + dev_err(dev, "problem beginning capture");
> +
> + msleep(10); /* delay for capture to finish */
> +
> + return ret;
> +}
> +
> +static 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;
> +}
> +
> +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) == 0 ? len : -EIO;
> + }
> + return -1;
> +}
> +
> +static ssize_t adis16220_write_capture(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_capture(dev) == 0 ? len : -EIO;
> + }
> + return -1;
> +}
> +
> +static 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;
> +}
> +
> +static 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 & 0x7F;
> +
> + 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;
> +
> + /* Do self test */
> + ret = adis16220_self_test(dev);
> + if (ret) {
> + dev_err(dev, "self test failure");
> + goto err_ret;
> + }
> +
> + /* 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 ssize_t adis16220_capture_buffer_read(struct adis16220_state *st,
> + char *buf,
> + loff_t off,
> + size_t count,
> + int addr)
> +{
> + struct spi_message msg;
> + struct spi_transfer xfers[] = {
> + {
> + .tx_buf = st->tx,
> + .bits_per_word = 8,
> + .len = 2,
> + .cs_change = 1,
> + .delay_usecs = 25,
> + }, {
> + .tx_buf = st->tx,
> + .rx_buf = st->rx,
> + .bits_per_word = 8,
> + .cs_change = 1,
> + .delay_usecs = 25,
> + },
> + };
> + int ret;
> + int i;
> +
> + if (unlikely(!count))
> + return count;
> +
> + if ((off >= ADIS16220_CAPTURE_SIZE) || (count & 1) || (off & 1))
> + return -EINVAL;
> +
> + if (off + count > ADIS16220_CAPTURE_SIZE)
> + count = ADIS16220_CAPTURE_SIZE - off;
> +
> + /* write the begin position of capture buffer */
> + ret = adis16220_spi_write_reg_16(&st->indio_dev->dev,
> + ADIS16220_CAPT_PNTR,
> + off > 1);
> + if (ret)
> + return -EIO;
> +
> + /* read count/2 values from capture buffer */
> + mutex_lock(&st->buf_lock);
> +
> + for (i = 0; i < count; i += 2) {
> + st->tx[i] = ADIS16220_READ_REG(addr);
> + st->tx[i + 1] = 0;
> + }
> + xfers[1].len = count;
> +
> + 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) {
> +
> + mutex_unlock(&st->buf_lock);
> + return -EIO;
> + }
> +
> + memcpy(buf, st->rx, count);
> +
> + mutex_unlock(&st->buf_lock);
> + return count;
> +}
> +
> +static ssize_t adis16220_accel_bin_read(struct kobject *kobj,
> + struct bin_attribute *attr,
> + char *buf,
> + loff_t off,
> + size_t count)
> +{
> + struct device *dev = container_of(kobj, struct device, kobj);
> + struct iio_dev *indio_dev = dev_get_drvdata(dev);
> + struct adis16220_state *st = iio_dev_get_devdata(indio_dev);
> +
> + return adis16220_capture_buffer_read(st, buf,
> + off, count,
> + ADIS16220_CAPT_BUFA);
> +}
> +
> +static ssize_t adis16220_adc1_bin_read(struct kobject *kobj,
> + struct bin_attribute *attr,
> + char *buf, loff_t off,
> + size_t count)
> +{
> + struct device *dev = container_of(kobj, struct device, kobj);
> + struct iio_dev *indio_dev = dev_get_drvdata(dev);
> + struct adis16220_state *st = iio_dev_get_devdata(indio_dev);
> +
> + return adis16220_capture_buffer_read(st, buf,
> + off, count,
> + ADIS16220_CAPT_BUF1);
> +}
> +
> +static ssize_t adis16220_adc2_bin_read(struct kobject *kobj,
> + struct bin_attribute *attr,
> + char *buf, loff_t off,
> + size_t count)
> +{
> + struct device *dev = container_of(kobj, struct device, kobj);
> + struct iio_dev *indio_dev = dev_get_drvdata(dev);
> + struct adis16220_state *st = iio_dev_get_devdata(indio_dev);
> +
> + return adis16220_capture_buffer_read(st, buf,
> + off, count,
> + ADIS16220_CAPT_BUF2);
> +}
> +
> +static IIO_DEV_ATTR_IN_NAMED_RAW(supply, adis16220_read_12bit_unsigned,
> + ADIS16220_CAPT_SUPPLY);
> +static IIO_CONST_ATTR(in_supply_scale, "0.0012207");
> +static IIO_DEV_ATTR_ACCEL(adis16220_read_16bit, ADIS16220_CAPT_BUFA);
> +static IIO_DEVICE_ATTR(accel_peak_raw, S_IRUGO, adis16220_read_16bit,
> + NULL, 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_RAW(adis16220_read_12bit_unsigned);
> +static IIO_CONST_ATTR(temp_offset, "25");
> +static IIO_CONST_ATTR(temp_scale, "-0.47");
> +
> +static IIO_DEV_ATTR_IN_RAW(0, adis16220_read_16bit, ADIS16220_CAPT_BUF1);
> +static IIO_DEV_ATTR_IN_RAW(1, adis16220_read_16bit, ADIS16220_CAPT_BUF2);
> +
> +static IIO_DEVICE_ATTR(reset, S_IWUSR, NULL,
> + adis16220_write_reset, 0);
> +
> +#define IIO_DEV_ATTR_CAPTURE(_store) \
> + IIO_DEVICE_ATTR(capture, S_IWUGO, NULL, _store, 0)
> +
> +static IIO_DEV_ATTR_CAPTURE(adis16220_write_capture);
> +
> +#define IIO_DEV_ATTR_CAPTURE_COUNT(_mode, _show, _store, _addr) \
> + IIO_DEVICE_ATTR(capture_count, _mode, _show, _store, _addr)
> +
> +static IIO_DEV_ATTR_CAPTURE_COUNT(S_IWUSR | S_IRUGO,
> + adis16220_read_16bit,
> + adis16220_write_16bit,
> + ADIS16220_CAPT_PNTR);
> +
> +static IIO_CONST_ATTR_AVAIL_SAMP_FREQ("100200");
> +
> +static IIO_CONST_ATTR(name, "adis16220");
> +
> +static struct attribute *adis16220_attributes[] = {
> + &iio_dev_attr_in_supply_raw.dev_attr.attr,
> + &iio_const_attr_in_supply_scale.dev_attr.attr,
> + &iio_dev_attr_accel_raw.dev_attr.attr,
> + &iio_dev_attr_accel_offset.dev_attr.attr,
> + &iio_dev_attr_accel_peak_raw.dev_attr.attr,
> + &iio_dev_attr_temp_raw.dev_attr.attr,
> + &iio_dev_attr_in0_raw.dev_attr.attr,
> + &iio_dev_attr_in1_raw.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_dev_attr_capture.dev_attr.attr,
> + &iio_dev_attr_capture_count.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->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 = iio_device_register(st->indio_dev);
> + if (ret)
> + goto error_free_dev;
> + regdone = 1;
> +
> + st->accel_bin.attr.name = "accel_bin";
> + st->accel_bin.attr.mode = S_IRUGO;
> + st->accel_bin.attr.owner = THIS_MODULE;
> + st->accel_bin.read = adis16220_accel_bin_read;
> + st->accel_bin.size = ADIS16220_CAPTURE_SIZE;
> +
> + ret = sysfs_create_bin_file(&st->indio_dev->dev.kobj, &st->accel_bin);
> + if (ret)
> + goto error_free_dev;
> +
> + st->adc1_bin.attr.name = "adc1_bin";
> + st->adc1_bin.attr.mode = S_IRUGO;
> + st->adc1_bin.attr.owner = THIS_MODULE;
> + st->adc1_bin.read = adis16220_adc1_bin_read;
> + st->adc1_bin.size = ADIS16220_CAPTURE_SIZE;
> +
> + ret = sysfs_create_bin_file(&st->indio_dev->dev.kobj, &st->adc1_bin);
> + if (ret)
> + goto error_rm_accel_bin;
> +
> + st->adc2_bin.attr.name = "adc2_bin";
> + st->adc2_bin.attr.mode = S_IRUGO;
> + st->adc2_bin.attr.owner = THIS_MODULE;
> + st->adc2_bin.read = adis16220_adc2_bin_read;
> + st->adc2_bin.size = ADIS16220_CAPTURE_SIZE;
> +
> + ret = sysfs_create_bin_file(&st->indio_dev->dev.kobj, &st->adc2_bin);
> + if (ret)
> + goto error_rm_adc1_bin;
> +
> + /* Get the device into a sane initial state */
> + ret = adis16220_initial_setup(st);
> + if (ret)
> + goto error_rm_adc2_bin;
> + return 0;
> +
> +error_rm_adc2_bin:
> + sysfs_remove_bin_file(&st->indio_dev->dev.kobj, &st->adc2_bin);
> +error_rm_adc1_bin:
> + sysfs_remove_bin_file(&st->indio_dev->dev.kobj, &st->adc1_bin);
> +error_rm_accel_bin:
> + sysfs_remove_bin_file(&st->indio_dev->dev.kobj, &st->accel_bin);
> +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 adis16220_remove(struct spi_device *spi)
> +{
> + struct adis16220_state *st = spi_get_drvdata(spi);
> + struct iio_dev *indio_dev = st->indio_dev;
> +
> + flush_scheduled_work();
> +
> + sysfs_remove_bin_file(&st->indio_dev->dev.kobj, &st->adc2_bin);
> + sysfs_remove_bin_file(&st->indio_dev->dev.kobj, &st->adc1_bin);
> + sysfs_remove_bin_file(&st->indio_dev->dev.kobj, &st->accel_bin);
> + iio_device_unregister(indio_dev);
> + kfree(st->tx);
> + kfree(st->rx);
> + kfree(st);
> +
> + return 0;
> +}
> +
> +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 <21cnbao@xxxxxxxxx>");
> +MODULE_DESCRIPTION("Analog Devices ADIS16220 Digital Vibration Sensor");
> +MODULE_LICENSE("GPL v2");
> --
> 1.7.0.4
>
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