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/*
* ADIS16240 Programmable Impact Sensor and Recorder 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/slab.h>
#include <linux/sysfs.h>
#include <linux/list.h>
#include <linux/module.h>
#include <linux/iio/iio.h>
#include <linux/iio/sysfs.h>
#include <linux/iio/buffer.h>
#include <linux/iio/imu/adis.h>
#include "adis16240.h"
static ssize_t adis16240_spi_read_signed(struct device *dev,
struct device_attribute *attr,
char *buf,
unsigned bits)
{
struct iio_dev *indio_dev = dev_to_iio_dev(dev);
struct adis *st = iio_priv(indio_dev);
int ret;
s16 val = 0;
unsigned shift = 16 - bits;
struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
ret = adis_read_reg_16(st,
this_attr->address, (u16 *)&val);
if (ret)
return ret;
if (val & ADIS16240_ERROR_ACTIVE)
adis_check_status(st);
val = (s16)(val << shift) >> shift;
return sprintf(buf, "%d\n", val);
}
static ssize_t adis16240_read_12bit_signed(struct device *dev,
struct device_attribute *attr,
char *buf)
{
ssize_t ret;
struct iio_dev *indio_dev = dev_to_iio_dev(dev);
/* Take the iio_dev status lock */
mutex_lock(&indio_dev->mlock);
ret = adis16240_spi_read_signed(dev, attr, buf, 12);
mutex_unlock(&indio_dev->mlock);
return ret;
}
static IIO_DEVICE_ATTR(in_accel_xyz_squared_peak_raw, S_IRUGO,
adis16240_read_12bit_signed, NULL,
ADIS16240_XYZPEAK_OUT);
static IIO_CONST_ATTR_SAMP_FREQ_AVAIL("4096");
static const u8 adis16240_addresses[][2] = {
[ADIS16240_SCAN_ACC_X] = { ADIS16240_XACCL_OFF, ADIS16240_XPEAK_OUT },
[ADIS16240_SCAN_ACC_Y] = { ADIS16240_YACCL_OFF, ADIS16240_YPEAK_OUT },
[ADIS16240_SCAN_ACC_Z] = { ADIS16240_ZACCL_OFF, ADIS16240_ZPEAK_OUT },
};
static int adis16240_read_raw(struct iio_dev *indio_dev,
struct iio_chan_spec const *chan,
int *val, int *val2,
long mask)
{
struct adis *st = iio_priv(indio_dev);
int ret;
int bits;
u8 addr;
s16 val16;
switch (mask) {
case IIO_CHAN_INFO_RAW:
return adis_single_conversion(indio_dev, chan,
ADIS16240_ERROR_ACTIVE, val);
case IIO_CHAN_INFO_SCALE:
switch (chan->type) {
case IIO_VOLTAGE:
if (chan->channel == 0) {
*val = 4;
*val2 = 880000; /* 4.88 mV */
return IIO_VAL_INT_PLUS_MICRO;
}
return -EINVAL;
case IIO_TEMP:
*val = 244; /* 0.244 C */
*val2 = 0;
return IIO_VAL_INT_PLUS_MICRO;
case IIO_ACCEL:
*val = 0;
*val2 = IIO_G_TO_M_S_2(51400); /* 51.4 mg */
return IIO_VAL_INT_PLUS_MICRO;
default:
return -EINVAL;
}
break;
case IIO_CHAN_INFO_PEAK_SCALE:
*val = 0;
*val2 = IIO_G_TO_M_S_2(51400); /* 51.4 mg */
return IIO_VAL_INT_PLUS_MICRO;
case IIO_CHAN_INFO_OFFSET:
*val = 25000 / 244 - 0x133; /* 25 C = 0x133 */
return IIO_VAL_INT;
case IIO_CHAN_INFO_CALIBBIAS:
bits = 10;
mutex_lock(&indio_dev->mlock);
addr = adis16240_addresses[chan->scan_index][0];
ret = adis_read_reg_16(st, addr, &val16);
if (ret) {
mutex_unlock(&indio_dev->mlock);
return ret;
}
val16 &= (1 << bits) - 1;
val16 = (s16)(val16 << (16 - bits)) >> (16 - bits);
*val = val16;
mutex_unlock(&indio_dev->mlock);
return IIO_VAL_INT;
case IIO_CHAN_INFO_PEAK:
bits = 10;
mutex_lock(&indio_dev->mlock);
addr = adis16240_addresses[chan->scan_index][1];
ret = adis_read_reg_16(st, addr, &val16);
if (ret) {
mutex_unlock(&indio_dev->mlock);
return ret;
}
val16 &= (1 << bits) - 1;
val16 = (s16)(val16 << (16 - bits)) >> (16 - bits);
*val = val16;
mutex_unlock(&indio_dev->mlock);
return IIO_VAL_INT;
}
return -EINVAL;
}
static int adis16240_write_raw(struct iio_dev *indio_dev,
struct iio_chan_spec const *chan,
int val,
int val2,
long mask)
{
struct adis *st = iio_priv(indio_dev);
int bits = 10;
s16 val16;
u8 addr;
switch (mask) {
case IIO_CHAN_INFO_CALIBBIAS:
val16 = val & ((1 << bits) - 1);
addr = adis16240_addresses[chan->scan_index][0];
return adis_write_reg_16(st, addr, val16);
}
return -EINVAL;
}
static const struct iio_chan_spec adis16240_channels[] = {
ADIS_SUPPLY_CHAN(ADIS16240_SUPPLY_OUT, ADIS16240_SCAN_SUPPLY, 0, 10),
ADIS_AUX_ADC_CHAN(ADIS16240_AUX_ADC, ADIS16240_SCAN_AUX_ADC, 0, 10),
ADIS_ACCEL_CHAN(X, ADIS16240_XACCL_OUT, ADIS16240_SCAN_ACC_X,
BIT(IIO_CHAN_INFO_CALIBBIAS) | BIT(IIO_CHAN_INFO_PEAK),
0, 10),
ADIS_ACCEL_CHAN(Y, ADIS16240_YACCL_OUT, ADIS16240_SCAN_ACC_Y,
BIT(IIO_CHAN_INFO_CALIBBIAS) | BIT(IIO_CHAN_INFO_PEAK),
0, 10),
ADIS_ACCEL_CHAN(Z, ADIS16240_ZACCL_OUT, ADIS16240_SCAN_ACC_Z,
BIT(IIO_CHAN_INFO_CALIBBIAS) | BIT(IIO_CHAN_INFO_PEAK),
0, 10),
ADIS_TEMP_CHAN(ADIS16240_TEMP_OUT, ADIS16240_SCAN_TEMP, 0, 10),
IIO_CHAN_SOFT_TIMESTAMP(6)
};
static struct attribute *adis16240_attributes[] = {
&iio_dev_attr_in_accel_xyz_squared_peak_raw.dev_attr.attr,
&iio_const_attr_sampling_frequency_available.dev_attr.attr,
NULL
};
static const struct attribute_group adis16240_attribute_group = {
.attrs = adis16240_attributes,
};
static const struct iio_info adis16240_info = {
.attrs = &adis16240_attribute_group,
.read_raw = &adis16240_read_raw,
.write_raw = &adis16240_write_raw,
.update_scan_mode = adis_update_scan_mode,
.driver_module = THIS_MODULE,
};
static const char * const adis16240_status_error_msgs[] = {
[ADIS16240_DIAG_STAT_PWRON_FAIL_BIT] = "Power on, self-test failed",
[ADIS16240_DIAG_STAT_SPI_FAIL_BIT] = "SPI failure",
[ADIS16240_DIAG_STAT_FLASH_UPT_BIT] = "Flash update failed",
[ADIS16240_DIAG_STAT_POWER_HIGH_BIT] = "Power supply above 3.625V",
[ADIS16240_DIAG_STAT_POWER_LOW_BIT] = "Power supply below 2.225V",
};
static const struct adis_data adis16240_data = {
.write_delay = 35,
.read_delay = 35,
.msc_ctrl_reg = ADIS16240_MSC_CTRL,
.glob_cmd_reg = ADIS16240_GLOB_CMD,
.diag_stat_reg = ADIS16240_DIAG_STAT,
.self_test_mask = ADIS16240_MSC_CTRL_SELF_TEST_EN,
.startup_delay = ADIS16240_STARTUP_DELAY,
.status_error_msgs = adis16240_status_error_msgs,
.status_error_mask = BIT(ADIS16240_DIAG_STAT_PWRON_FAIL_BIT) |
BIT(ADIS16240_DIAG_STAT_SPI_FAIL_BIT) |
BIT(ADIS16240_DIAG_STAT_FLASH_UPT_BIT) |
BIT(ADIS16240_DIAG_STAT_POWER_HIGH_BIT) |
BIT(ADIS16240_DIAG_STAT_POWER_LOW_BIT),
};
static int adis16240_probe(struct spi_device *spi)
{
int ret;
struct adis *st;
struct iio_dev *indio_dev;
/* setup the industrialio driver allocated elements */
indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*st));
if (!indio_dev)
return -ENOMEM;
st = iio_priv(indio_dev);
/* this is only used for removal purposes */
spi_set_drvdata(spi, indio_dev);
indio_dev->name = spi->dev.driver->name;
indio_dev->dev.parent = &spi->dev;
indio_dev->info = &adis16240_info;
indio_dev->channels = adis16240_channels;
indio_dev->num_channels = ARRAY_SIZE(adis16240_channels);
indio_dev->modes = INDIO_DIRECT_MODE;
ret = adis_init(st, indio_dev, spi, &adis16240_data);
if (ret)
return ret;
ret = adis_setup_buffer_and_trigger(st, indio_dev, NULL);
if (ret)
return ret;
/* Get the device into a sane initial state */
ret = adis_initial_startup(st);
if (ret)
goto error_cleanup_buffer_trigger;
ret = iio_device_register(indio_dev);
if (ret)
goto error_cleanup_buffer_trigger;
return 0;
error_cleanup_buffer_trigger:
adis_cleanup_buffer_and_trigger(st, indio_dev);
return ret;
}
static int adis16240_remove(struct spi_device *spi)
{
struct iio_dev *indio_dev = spi_get_drvdata(spi);
struct adis *st = iio_priv(indio_dev);
iio_device_unregister(indio_dev);
adis_cleanup_buffer_and_trigger(st, indio_dev);
return 0;
}
static struct spi_driver adis16240_driver = {
.driver = {
.name = "adis16240",
},
.probe = adis16240_probe,
.remove = adis16240_remove,
};
module_spi_driver(adis16240_driver);
MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>");
MODULE_DESCRIPTION("Analog Devices Programmable Impact Sensor and Recorder");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("spi:adis16240");
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