forked from Minki/linux
staging:iio:accel:adis16220 iio_chan_spec conversion.
I still have numerous issues with this driver and it needs a substantial rewrite. Whilst doing this patch at least one bug has been fixed (temp reading didn't have an address) and a number of missing channel info elements added. Untested! Signed-off-by: Jonathan Cameron <jic23@cam.ac.uk> Acked-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Jonathan Cameron
Greg Kroah-Hartman
parent
c9b9e49e13
commit
7991029a55
@ -6,9 +6,6 @@
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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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@ -16,12 +13,9 @@
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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 "../adc/adc.h"
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#include "adis16220.h"
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@ -29,16 +23,15 @@
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/**
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* adis16220_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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* @indio_dev: iio device associated with child of actual device
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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 adis16220_spi_write_reg_8(struct device *dev,
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static int adis16220_spi_write_reg_8(struct iio_dev *indio_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 adis16220_state *st = iio_priv(indio_dev);
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mutex_lock(&st->buf_lock);
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@ -53,18 +46,17 @@ static int adis16220_spi_write_reg_8(struct device *dev,
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/**
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* adis16220_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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* @indio_dev: iio device associated with child of actual device
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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 adis16220_spi_write_reg_16(struct device *dev,
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static int adis16220_spi_write_reg_16(struct iio_dev *indio_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 adis16220_state *st = iio_priv(indio_dev);
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struct spi_transfer xfers[] = {
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{
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@ -77,7 +69,6 @@ static int adis16220_spi_write_reg_16(struct device *dev,
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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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.delay_usecs = 35,
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},
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};
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@ -99,17 +90,16 @@ static int adis16220_spi_write_reg_16(struct device *dev,
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/**
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* adis16220_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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* @indio_dev: iio device associated with child of actual device
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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 adis16220_spi_read_reg_16(struct device *dev,
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static int adis16220_spi_read_reg_16(struct iio_dev *indio_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);
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struct adis16220_state *st = iio_priv(indio_dev);
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int ret;
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struct spi_transfer xfers[] = {
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@ -149,52 +139,23 @@ error_ret:
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return ret;
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}
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static ssize_t adis16220_spi_read_signed(struct device *dev,
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struct device_attribute *attr,
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char *buf,
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unsigned bits)
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{
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int ret;
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s16 val = 0;
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unsigned shift = 16 - bits;
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struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
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ret = adis16220_spi_read_reg_16(dev, this_attr->address, (u16 *)&val);
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if (ret)
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return ret;
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val = ((s16)(val << shift) >> shift);
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return sprintf(buf, "%d\n", val);
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}
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static ssize_t adis16220_read_12bit_unsigned(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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int ret;
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u16 val = 0;
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struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
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ret = adis16220_spi_read_reg_16(dev, this_attr->address, &val);
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if (ret)
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return ret;
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return sprintf(buf, "%u\n", val & 0x0FFF);
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}
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static ssize_t adis16220_read_16bit(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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struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
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struct iio_dev *indio_dev = dev_get_drvdata(dev);
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ssize_t ret;
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s16 val = 0;
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/* Take the iio_dev status lock */
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mutex_lock(&indio_dev->mlock);
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ret = adis16220_spi_read_signed(dev, attr, buf, 16);
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ret = adis16220_spi_read_reg_16(indio_dev, this_attr->address,
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(u16 *)&val);
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mutex_unlock(&indio_dev->mlock);
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if (ret)
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return ret;
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return sprintf(buf, "%d\n", val);
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}
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static ssize_t adis16220_write_16bit(struct device *dev,
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@ -202,6 +163,7 @@ static ssize_t adis16220_write_16bit(struct device *dev,
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const char *buf,
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size_t len)
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{
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struct iio_dev *indio_dev = dev_get_drvdata(dev);
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struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
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int ret;
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long val;
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@ -209,34 +171,34 @@ static ssize_t adis16220_write_16bit(struct device *dev,
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ret = strict_strtol(buf, 10, &val);
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if (ret)
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goto error_ret;
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ret = adis16220_spi_write_reg_16(dev, this_attr->address, val);
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ret = adis16220_spi_write_reg_16(indio_dev, this_attr->address, val);
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error_ret:
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return ret ? ret : len;
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}
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static int adis16220_capture(struct device *dev)
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static int adis16220_capture(struct iio_dev *indio_dev)
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{
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int ret;
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ret = adis16220_spi_write_reg_16(dev,
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ret = adis16220_spi_write_reg_16(indio_dev,
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ADIS16220_GLOB_CMD,
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0xBF08); /* initiates a manual data capture */
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if (ret)
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dev_err(dev, "problem beginning capture");
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dev_err(&indio_dev->dev, "problem beginning capture");
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msleep(10); /* delay for capture to finish */
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return ret;
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}
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static int adis16220_reset(struct device *dev)
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static int adis16220_reset(struct iio_dev *indio_dev)
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{
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int ret;
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ret = adis16220_spi_write_reg_8(dev,
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ret = adis16220_spi_write_reg_8(indio_dev,
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ADIS16220_GLOB_CMD,
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ADIS16220_GLOB_CMD_SW_RESET);
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if (ret)
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dev_err(dev, "problem resetting device");
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dev_err(&indio_dev->dev, "problem resetting device");
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return ret;
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}
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@ -245,72 +207,84 @@ static ssize_t adis16220_write_reset(struct device *dev,
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struct device_attribute *attr,
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const char *buf, size_t len)
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{
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if (len < 1)
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return -1;
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switch (buf[0]) {
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case '1':
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case 'y':
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case 'Y':
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return adis16220_reset(dev) == 0 ? len : -EIO;
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}
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return -1;
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struct iio_dev *indio_dev = dev_get_drvdata(dev);
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bool val;
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int ret;
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ret = strtobool(buf, &val);
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if (ret)
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return ret;
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if (!val)
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return -EINVAL;
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ret = adis16220_reset(indio_dev);
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if (ret)
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return ret;
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return len;
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}
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static ssize_t adis16220_write_capture(struct device *dev,
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struct device_attribute *attr,
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const char *buf, size_t len)
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{
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if (len < 1)
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return -1;
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switch (buf[0]) {
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case '1':
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case 'y':
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case 'Y':
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return adis16220_capture(dev) == 0 ? len : -EIO;
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}
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return -1;
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struct iio_dev *indio_dev = dev_get_drvdata(dev);
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bool val;
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int ret;
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ret = strtobool(buf, &val);
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if (ret)
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return ret;
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if (!val)
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return -EINVAL;
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ret = adis16220_capture(indio_dev);
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if (ret)
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return ret;
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return len;
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}
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static int adis16220_check_status(struct device *dev)
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static int adis16220_check_status(struct iio_dev *indio_dev)
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{
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u16 status;
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int ret;
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ret = adis16220_spi_read_reg_16(dev, ADIS16220_DIAG_STAT, &status);
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ret = adis16220_spi_read_reg_16(indio_dev, ADIS16220_DIAG_STAT,
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&status);
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if (ret < 0) {
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dev_err(dev, "Reading status failed\n");
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dev_err(&indio_dev->dev, "Reading status failed\n");
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goto error_ret;
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}
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ret = status & 0x7F;
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if (status & ADIS16220_DIAG_STAT_VIOLATION)
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dev_err(dev, "Capture period violation/interruption\n");
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dev_err(&indio_dev->dev,
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"Capture period violation/interruption\n");
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if (status & ADIS16220_DIAG_STAT_SPI_FAIL)
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dev_err(dev, "SPI failure\n");
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dev_err(&indio_dev->dev, "SPI failure\n");
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if (status & ADIS16220_DIAG_STAT_FLASH_UPT)
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dev_err(dev, "Flash update failed\n");
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dev_err(&indio_dev->dev, "Flash update failed\n");
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if (status & ADIS16220_DIAG_STAT_POWER_HIGH)
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dev_err(dev, "Power supply above 3.625V\n");
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dev_err(&indio_dev->dev, "Power supply above 3.625V\n");
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if (status & ADIS16220_DIAG_STAT_POWER_LOW)
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dev_err(dev, "Power supply below 3.15V\n");
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dev_err(&indio_dev->dev, "Power supply below 3.15V\n");
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error_ret:
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return ret;
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}
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static int adis16220_self_test(struct device *dev)
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static int adis16220_self_test(struct iio_dev *indio_dev)
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{
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int ret;
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ret = adis16220_spi_write_reg_16(dev,
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ret = adis16220_spi_write_reg_16(indio_dev,
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ADIS16220_MSC_CTRL,
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ADIS16220_MSC_CTRL_SELF_TEST_EN);
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if (ret) {
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dev_err(dev, "problem starting self test");
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dev_err(&indio_dev->dev, "problem starting self test");
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goto err_ret;
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}
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adis16220_check_status(dev);
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adis16220_check_status(indio_dev);
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err_ret:
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return ret;
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@ -319,24 +293,23 @@ err_ret:
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static int adis16220_initial_setup(struct iio_dev *indio_dev)
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{
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int ret;
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struct device *dev = &indio_dev->dev;
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/* Do self test */
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ret = adis16220_self_test(dev);
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ret = adis16220_self_test(indio_dev);
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if (ret) {
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dev_err(dev, "self test failure");
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dev_err(&indio_dev->dev, "self test failure");
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goto err_ret;
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}
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/* Read status register to check the result */
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ret = adis16220_check_status(dev);
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ret = adis16220_check_status(indio_dev);
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if (ret) {
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adis16220_reset(dev);
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dev_err(dev, "device not playing ball -> reset");
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adis16220_reset(indio_dev);
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dev_err(&indio_dev->dev, "device not playing ball -> reset");
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msleep(ADIS16220_STARTUP_DELAY);
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ret = adis16220_check_status(dev);
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ret = adis16220_check_status(indio_dev);
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if (ret) {
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dev_err(dev, "giving up");
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dev_err(&indio_dev->dev, "giving up");
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goto err_ret;
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}
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}
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@ -381,7 +354,7 @@ static ssize_t adis16220_capture_buffer_read(struct iio_dev *indio_dev,
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count = ADIS16220_CAPTURE_SIZE - off;
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/* write the begin position of capture buffer */
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ret = adis16220_spi_write_reg_16(&indio_dev->dev,
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ret = adis16220_spi_write_reg_16(indio_dev,
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ADIS16220_CAPT_PNTR,
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off > 1);
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if (ret)
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@ -480,24 +453,6 @@ static struct bin_attribute adc2_bin = {
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.size = ADIS16220_CAPTURE_SIZE,
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};
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static IIO_DEV_ATTR_IN_NAMED_RAW(0, supply, adis16220_read_12bit_unsigned,
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ADIS16220_CAPT_SUPPLY);
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static IIO_CONST_ATTR_IN_NAMED_SCALE(0, supply, "0.0012207");
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static IIO_DEV_ATTR_ACCEL(adis16220_read_16bit, ADIS16220_CAPT_BUFA);
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static IIO_DEVICE_ATTR(accel_peak_raw, S_IRUGO, adis16220_read_16bit,
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NULL, ADIS16220_CAPT_PEAKA);
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static IIO_DEV_ATTR_ACCEL_OFFSET(S_IWUSR | S_IRUGO,
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adis16220_read_16bit,
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adis16220_write_16bit,
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ADIS16220_ACCL_NULL);
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static IIO_CONST_ATTR_ACCEL_SCALE("0.18704223545");
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static IIO_DEV_ATTR_TEMP_RAW(adis16220_read_12bit_unsigned);
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static IIO_CONST_ATTR_TEMP_OFFSET("25");
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static IIO_CONST_ATTR_TEMP_SCALE("-0.47");
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static IIO_DEV_ATTR_IN_RAW(1, adis16220_read_16bit, ADIS16220_CAPT_BUF1);
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static IIO_DEV_ATTR_IN_RAW(2, adis16220_read_16bit, ADIS16220_CAPT_BUF2);
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static IIO_DEVICE_ATTR(reset, S_IWUSR, NULL,
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adis16220_write_reset, 0);
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@ -514,21 +469,142 @@ static IIO_DEV_ATTR_CAPTURE_COUNT(S_IWUSR | S_IRUGO,
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adis16220_write_16bit,
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ADIS16220_CAPT_PNTR);
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static IIO_CONST_ATTR_SAMP_FREQ_AVAIL("100200");
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enum adis16220_channel {
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in_supply, in_1, in_2, accel, temp
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};
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struct adis16220_address_spec {
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u8 addr;
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u8 bits;
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bool sign;
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};
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/* Address / bits / signed */
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static const struct adis16220_address_spec adis16220_addresses[][3] = {
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[in_supply] = { { ADIS16220_CAPT_SUPPLY, 12, 0 }, },
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[in_1] = { { ADIS16220_CAPT_BUF1, 16, 1 },
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{ ADIS16220_AIN1_NULL, 16, 1 },
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{ ADIS16220_CAPT_PEAK1, 16, 1 }, },
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[in_2] = { { ADIS16220_CAPT_BUF2, 16, 1 },
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{ ADIS16220_AIN2_NULL, 16, 1 },
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{ ADIS16220_CAPT_PEAK2, 16, 1 }, },
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[accel] = { { ADIS16220_CAPT_BUFA, 16, 1 },
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{ ADIS16220_ACCL_NULL, 16, 1 },
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{ ADIS16220_CAPT_PEAKA, 16, 1 }, },
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[temp] = { { ADIS16220_CAPT_TEMP, 12, 0 }, }
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};
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static int adis16220_read_raw(struct iio_dev *indio_dev,
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struct iio_chan_spec const *chan,
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int *val, int *val2,
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long mask)
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{
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int ret = -EINVAL;
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int addrind = 0;
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u16 uval;
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s16 sval;
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u8 bits;
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switch (mask) {
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case 0:
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addrind = 0;
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break;
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case (1 << IIO_CHAN_INFO_OFFSET_SEPARATE):
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if (chan->type == IIO_TEMP) {
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*val = 25;
|
||||
return IIO_VAL_INT;
|
||||
}
|
||||
addrind = 1;
|
||||
break;
|
||||
case (1 << IIO_CHAN_INFO_PEAK_SEPARATE):
|
||||
addrind = 2;
|
||||
break;
|
||||
case (1 << IIO_CHAN_INFO_SCALE_SEPARATE):
|
||||
*val = 0;
|
||||
switch (chan->type) {
|
||||
case IIO_TEMP:
|
||||
*val2 = -470000;
|
||||
return IIO_VAL_INT_PLUS_MICRO;
|
||||
case IIO_ACCEL:
|
||||
*val2 = 1887042;
|
||||
return IIO_VAL_INT_PLUS_MICRO;
|
||||
case IIO_IN:
|
||||
if (chan->channel == 0)
|
||||
*val2 = 0012221;
|
||||
else /* Should really be dependent on VDD */
|
||||
*val2 = 305;
|
||||
return IIO_VAL_INT_PLUS_MICRO;
|
||||
default:
|
||||
return -EINVAL;
|
||||
}
|
||||
default:
|
||||
return -EINVAL;
|
||||
}
|
||||
if (adis16220_addresses[chan->address][addrind].sign) {
|
||||
ret = adis16220_spi_read_reg_16(indio_dev,
|
||||
adis16220_addresses[chan
|
||||
->address]
|
||||
[addrind].addr,
|
||||
&sval);
|
||||
if (ret)
|
||||
return ret;
|
||||
bits = adis16220_addresses[chan->address][addrind].bits;
|
||||
sval &= (1 << bits) - 1;
|
||||
sval = (s16)(sval << (16 - bits)) >> (16 - bits);
|
||||
*val = sval;
|
||||
return IIO_VAL_INT;
|
||||
} else {
|
||||
ret = adis16220_spi_read_reg_16(indio_dev,
|
||||
adis16220_addresses[chan
|
||||
->address]
|
||||
[addrind].addr,
|
||||
&uval);
|
||||
if (ret)
|
||||
return ret;
|
||||
bits = adis16220_addresses[chan->address][addrind].bits;
|
||||
uval &= (1 << bits) - 1;
|
||||
*val = uval;
|
||||
return IIO_VAL_INT;
|
||||
}
|
||||
}
|
||||
|
||||
static const struct iio_chan_spec adis16220_channels[] = {
|
||||
{
|
||||
.type = IIO_IN,
|
||||
.indexed = 1,
|
||||
.channel = 0,
|
||||
.extend_name = "supply",
|
||||
.info_mask = (1 << IIO_CHAN_INFO_SCALE_SEPARATE),
|
||||
.address = in_supply,
|
||||
}, {
|
||||
.type = IIO_ACCEL,
|
||||
.info_mask = (1 << IIO_CHAN_INFO_OFFSET_SEPARATE) |
|
||||
(1 << IIO_CHAN_INFO_SCALE_SEPARATE) |
|
||||
(1 << IIO_CHAN_INFO_PEAK_SEPARATE),
|
||||
.address = accel,
|
||||
}, {
|
||||
.type = IIO_TEMP,
|
||||
.indexed = 1,
|
||||
.channel = 0,
|
||||
.info_mask = (1 << IIO_CHAN_INFO_OFFSET_SEPARATE) |
|
||||
(1 << IIO_CHAN_INFO_SCALE_SEPARATE),
|
||||
.address = temp,
|
||||
}, {
|
||||
.type = IIO_IN,
|
||||
.indexed = 1,
|
||||
.channel = 1,
|
||||
.info_mask = (1 << IIO_CHAN_INFO_OFFSET_SEPARATE) |
|
||||
(1 << IIO_CHAN_INFO_SCALE_SEPARATE),
|
||||
.address = in_1,
|
||||
}, {
|
||||
.type = IIO_IN,
|
||||
.indexed = 1,
|
||||
.channel = 2,
|
||||
.address = in_2,
|
||||
}
|
||||
};
|
||||
|
||||
static struct attribute *adis16220_attributes[] = {
|
||||
&iio_dev_attr_in0_supply_raw.dev_attr.attr,
|
||||
&iio_const_attr_in0_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_const_attr_accel_scale.dev_attr.attr,
|
||||
&iio_dev_attr_temp_raw.dev_attr.attr,
|
||||
&iio_dev_attr_in1_raw.dev_attr.attr,
|
||||
&iio_dev_attr_in2_raw.dev_attr.attr,
|
||||
&iio_const_attr_temp_offset.dev_attr.attr,
|
||||
&iio_const_attr_temp_scale.dev_attr.attr,
|
||||
&iio_const_attr_sampling_frequency_available.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,
|
||||
@ -542,7 +618,9 @@ static const struct attribute_group adis16220_attribute_group = {
|
||||
static const struct iio_info adis16220_info = {
|
||||
.attrs = &adis16220_attribute_group,
|
||||
.driver_module = THIS_MODULE,
|
||||
.read_raw = &adis16220_read_raw,
|
||||
};
|
||||
|
||||
static int __devinit adis16220_probe(struct spi_device *spi)
|
||||
{
|
||||
int ret, regdone = 0;
|
||||
@ -567,6 +645,8 @@ static int __devinit adis16220_probe(struct spi_device *spi)
|
||||
indio_dev->dev.parent = &spi->dev;
|
||||
indio_dev->info = &adis16220_info;
|
||||
indio_dev->modes = INDIO_DIRECT_MODE;
|
||||
indio_dev->channels = adis16220_channels;
|
||||
indio_dev->num_channels = ARRAY_SIZE(adis16220_channels);
|
||||
|
||||
ret = iio_device_register(indio_dev);
|
||||
if (ret)
|
||||
|
||||
Loading…
Reference in New Issue
Block a user