// SPDX-License-Identifier: GPL-2.0+
|
/*
|
* ADIS16240 Programmable Impact Sensor and Recorder driver
|
*
|
* Copyright 2010 Analog Devices Inc.
|
*/
|
|
#include <linux/interrupt.h>
|
#include <linux/irq.h>
|
#include <linux/delay.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>
|
|
#define ADIS16240_STARTUP_DELAY 220 /* ms */
|
|
/* Flash memory write count */
|
#define ADIS16240_FLASH_CNT 0x00
|
|
/* Output, power supply */
|
#define ADIS16240_SUPPLY_OUT 0x02
|
|
/* Output, x-axis accelerometer */
|
#define ADIS16240_XACCL_OUT 0x04
|
|
/* Output, y-axis accelerometer */
|
#define ADIS16240_YACCL_OUT 0x06
|
|
/* Output, z-axis accelerometer */
|
#define ADIS16240_ZACCL_OUT 0x08
|
|
/* Output, auxiliary ADC input */
|
#define ADIS16240_AUX_ADC 0x0A
|
|
/* Output, temperature */
|
#define ADIS16240_TEMP_OUT 0x0C
|
|
/* Output, x-axis acceleration peak */
|
#define ADIS16240_XPEAK_OUT 0x0E
|
|
/* Output, y-axis acceleration peak */
|
#define ADIS16240_YPEAK_OUT 0x10
|
|
/* Output, z-axis acceleration peak */
|
#define ADIS16240_ZPEAK_OUT 0x12
|
|
/* Output, sum-of-squares acceleration peak */
|
#define ADIS16240_XYZPEAK_OUT 0x14
|
|
/* Output, Capture Buffer 1, X and Y acceleration */
|
#define ADIS16240_CAPT_BUF1 0x16
|
|
/* Output, Capture Buffer 2, Z acceleration */
|
#define ADIS16240_CAPT_BUF2 0x18
|
|
/* Diagnostic, error flags */
|
#define ADIS16240_DIAG_STAT 0x1A
|
|
/* Diagnostic, event counter */
|
#define ADIS16240_EVNT_CNTR 0x1C
|
|
/* Diagnostic, check sum value from firmware test */
|
#define ADIS16240_CHK_SUM 0x1E
|
|
/* Calibration, x-axis acceleration offset adjustment */
|
#define ADIS16240_XACCL_OFF 0x20
|
|
/* Calibration, y-axis acceleration offset adjustment */
|
#define ADIS16240_YACCL_OFF 0x22
|
|
/* Calibration, z-axis acceleration offset adjustment */
|
#define ADIS16240_ZACCL_OFF 0x24
|
|
/* Clock, hour and minute */
|
#define ADIS16240_CLK_TIME 0x2E
|
|
/* Clock, month and day */
|
#define ADIS16240_CLK_DATE 0x30
|
|
/* Clock, year */
|
#define ADIS16240_CLK_YEAR 0x32
|
|
/* Wake-up setting, hour and minute */
|
#define ADIS16240_WAKE_TIME 0x34
|
|
/* Wake-up setting, month and day */
|
#define ADIS16240_WAKE_DATE 0x36
|
|
/* Alarm 1 amplitude threshold */
|
#define ADIS16240_ALM_MAG1 0x38
|
|
/* Alarm 2 amplitude threshold */
|
#define ADIS16240_ALM_MAG2 0x3A
|
|
/* Alarm control */
|
#define ADIS16240_ALM_CTRL 0x3C
|
|
/* Capture, external trigger control */
|
#define ADIS16240_XTRIG_CTRL 0x3E
|
|
/* Capture, address pointer */
|
#define ADIS16240_CAPT_PNTR 0x40
|
|
/* Capture, configuration and control */
|
#define ADIS16240_CAPT_CTRL 0x42
|
|
/* General-purpose digital input/output control */
|
#define ADIS16240_GPIO_CTRL 0x44
|
|
/* Miscellaneous control */
|
#define ADIS16240_MSC_CTRL 0x46
|
|
/* Internal sample period (rate) control */
|
#define ADIS16240_SMPL_PRD 0x48
|
|
/* System command */
|
#define ADIS16240_GLOB_CMD 0x4A
|
|
/* MSC_CTRL */
|
|
/* Enables sum-of-squares output (XYZPEAK_OUT) */
|
#define ADIS16240_MSC_CTRL_XYZPEAK_OUT_EN BIT(15)
|
|
/* Enables peak tracking output (XPEAK_OUT, YPEAK_OUT, and ZPEAK_OUT) */
|
#define ADIS16240_MSC_CTRL_X_Y_ZPEAK_OUT_EN BIT(14)
|
|
/* Self-test enable: 1 = apply electrostatic force, 0 = disabled */
|
#define ADIS16240_MSC_CTRL_SELF_TEST_EN BIT(8)
|
|
/* Data-ready enable: 1 = enabled, 0 = disabled */
|
#define ADIS16240_MSC_CTRL_DATA_RDY_EN BIT(2)
|
|
/* Data-ready polarity: 1 = active high, 0 = active low */
|
#define ADIS16240_MSC_CTRL_ACTIVE_HIGH BIT(1)
|
|
/* Data-ready line selection: 1 = DIO2, 0 = DIO1 */
|
#define ADIS16240_MSC_CTRL_DATA_RDY_DIO2 BIT(0)
|
|
/* DIAG_STAT */
|
|
/* Alarm 2 status: 1 = alarm active, 0 = alarm inactive */
|
#define ADIS16240_DIAG_STAT_ALARM2 BIT(9)
|
|
/* Alarm 1 status: 1 = alarm active, 0 = alarm inactive */
|
#define ADIS16240_DIAG_STAT_ALARM1 BIT(8)
|
|
/* Capture buffer full: 1 = capture buffer is full */
|
#define ADIS16240_DIAG_STAT_CPT_BUF_FUL BIT(7)
|
|
/* Flash test, checksum flag: 1 = mismatch, 0 = match */
|
#define ADIS16240_DIAG_STAT_CHKSUM BIT(6)
|
|
/* Power-on, self-test flag: 1 = failure, 0 = pass */
|
#define ADIS16240_DIAG_STAT_PWRON_FAIL_BIT 5
|
|
/* Power-on self-test: 1 = in-progress, 0 = complete */
|
#define ADIS16240_DIAG_STAT_PWRON_BUSY BIT(4)
|
|
/* SPI communications failure */
|
#define ADIS16240_DIAG_STAT_SPI_FAIL_BIT 3
|
|
/* Flash update failure */
|
#define ADIS16240_DIAG_STAT_FLASH_UPT_BIT 2
|
|
/* Power supply above 3.625 V */
|
#define ADIS16240_DIAG_STAT_POWER_HIGH_BIT 1
|
|
/* Power supply below 2.225 V */
|
#define ADIS16240_DIAG_STAT_POWER_LOW_BIT 0
|
|
/* GLOB_CMD */
|
|
#define ADIS16240_GLOB_CMD_RESUME BIT(8)
|
#define ADIS16240_GLOB_CMD_SW_RESET BIT(7)
|
#define ADIS16240_GLOB_CMD_STANDBY BIT(2)
|
|
#define ADIS16240_ERROR_ACTIVE BIT(14)
|
|
/* At the moment triggers are only used for ring buffer
|
* filling. This may change!
|
*/
|
|
enum adis16240_scan {
|
ADIS16240_SCAN_ACC_X,
|
ADIS16240_SCAN_ACC_Y,
|
ADIS16240_SCAN_ACC_Z,
|
ADIS16240_SCAN_SUPPLY,
|
ADIS16240_SCAN_AUX_ADC,
|
ADIS16240_SCAN_TEMP,
|
};
|
|
static ssize_t adis16240_spi_read_signed(struct device *dev,
|
struct device_attribute *attr,
|
char *buf,
|
unsigned int bits)
|
{
|
struct iio_dev *indio_dev = dev_to_iio_dev(dev);
|
struct adis *st = iio_priv(indio_dev);
|
int ret;
|
s16 val = 0;
|
unsigned int 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)
|
{
|
return adis16240_spi_read_signed(dev, attr, buf, 12);
|
}
|
|
static IIO_DEVICE_ATTR(in_accel_xyz_squared_peak_raw, 0444,
|
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;
|
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:
|
addr = adis16240_addresses[chan->scan_index][0];
|
ret = adis_read_reg_16(st, addr, &val16);
|
if (ret)
|
return ret;
|
*val = sign_extend32(val16, 9);
|
return IIO_VAL_INT;
|
case IIO_CHAN_INFO_PEAK:
|
addr = adis16240_addresses[chan->scan_index][1];
|
ret = adis_read_reg_16(st, addr, &val16);
|
if (ret)
|
return ret;
|
*val = sign_extend32(val16, 9);
|
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);
|
u8 addr;
|
|
switch (mask) {
|
case IIO_CHAN_INFO_CALIBBIAS:
|
addr = adis16240_addresses[chan->scan_index][0];
|
return adis_write_reg_16(st, addr, val & GENMASK(9, 0));
|
}
|
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,
|
};
|
|
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_timeout adis16240_timeouts = {
|
.reset_ms = ADIS16240_STARTUP_DELAY,
|
.sw_reset_ms = ADIS16240_STARTUP_DELAY,
|
.self_test_ms = ADIS16240_STARTUP_DELAY,
|
};
|
|
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,
|
.self_test_reg = ADIS16240_MSC_CTRL,
|
.self_test_no_autoclear = true,
|
.timeouts = &adis16240_timeouts,
|
|
.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->info = &adis16240_info;
|
indio_dev->channels = adis16240_channels;
|
indio_dev->num_channels = ARRAY_SIZE(adis16240_channels);
|
indio_dev->modes = INDIO_DIRECT_MODE;
|
|
spi->mode = SPI_MODE_3;
|
ret = spi_setup(spi);
|
if (ret) {
|
dev_err(&spi->dev, "spi_setup failed!\n");
|
return ret;
|
}
|
|
ret = adis_init(st, indio_dev, spi, &adis16240_data);
|
if (ret)
|
return ret;
|
ret = devm_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)
|
return ret;
|
|
return devm_iio_device_register(&spi->dev, indio_dev);
|
}
|
static const struct of_device_id adis16240_of_match[] = {
|
{ .compatible = "adi,adis16240" },
|
{ },
|
};
|
MODULE_DEVICE_TABLE(of, adis16240_of_match);
|
|
static struct spi_driver adis16240_driver = {
|
.driver = {
|
.name = "adis16240",
|
.of_match_table = adis16240_of_match,
|
},
|
.probe = adis16240_probe,
|
};
|
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");
|
