// SPDX-License-Identifier: GPL-2.0+
/*
* ADIS16203 Programmable 360 Degrees Inclinometer
*
* Copyright 2010 Analog Devices Inc.
*/
#include <linux/device.h>
#include <linux/iio/iio.h>
#include <linux/iio/imu/adis.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/spi/spi.h>
#define ADIS16203_STARTUP_DELAY 220 /* ms */
/* Flash memory write count */
#define ADIS16203_FLASH_CNT 0x00
/* Output, power supply */
#define ADIS16203_SUPPLY_OUT 0x02
/* Output, auxiliary ADC input */
#define ADIS16203_AUX_ADC 0x08
/* Output, temperature */
#define ADIS16203_TEMP_OUT 0x0A
/* Output, x-axis inclination */
#define ADIS16203_XINCL_OUT 0x0C
/* Output, y-axis inclination */
#define ADIS16203_YINCL_OUT 0x0E
/* Incline null calibration */
#define ADIS16203_INCL_NULL 0x18
/* Alarm 1 amplitude threshold */
#define ADIS16203_ALM_MAG1 0x20
/* Alarm 2 amplitude threshold */
#define ADIS16203_ALM_MAG2 0x22
/* Alarm 1, sample period */
#define ADIS16203_ALM_SMPL1 0x24
/* Alarm 2, sample period */
#define ADIS16203_ALM_SMPL2 0x26
/* Alarm control */
#define ADIS16203_ALM_CTRL 0x28
/* Auxiliary DAC data */
#define ADIS16203_AUX_DAC 0x30
/* General-purpose digital input/output control */
#define ADIS16203_GPIO_CTRL 0x32
/* Miscellaneous control */
#define ADIS16203_MSC_CTRL 0x34
/* Internal sample period (rate) control */
#define ADIS16203_SMPL_PRD 0x36
/* Operation, filter configuration */
#define ADIS16203_AVG_CNT 0x38
/* Operation, sleep mode control */
#define ADIS16203_SLP_CNT 0x3A
/* Diagnostics, system status register */
#define ADIS16203_DIAG_STAT 0x3C
/* Operation, system command register */
#define ADIS16203_GLOB_CMD 0x3E
/* MSC_CTRL */
/* Self-test at power-on: 1 = disabled, 0 = enabled */
#define ADIS16203_MSC_CTRL_PWRUP_SELF_TEST BIT(10)
/* Reverses rotation of both inclination outputs */
#define ADIS16203_MSC_CTRL_REVERSE_ROT_EN BIT(9)
/* Self-test enable */
#define ADIS16203_MSC_CTRL_SELF_TEST_EN BIT(8)
/* Data-ready enable: 1 = enabled, 0 = disabled */
#define ADIS16203_MSC_CTRL_DATA_RDY_EN BIT(2)
/* Data-ready polarity: 1 = active high, 0 = active low */
#define ADIS16203_MSC_CTRL_ACTIVE_HIGH BIT(1)
/* Data-ready line selection: 1 = DIO1, 0 = DIO0 */
#define ADIS16203_MSC_CTRL_DATA_RDY_DIO1 BIT(0)
/* DIAG_STAT */
/* Alarm 2 status: 1 = alarm active, 0 = alarm inactive */
#define ADIS16203_DIAG_STAT_ALARM2 BIT(9)
/* Alarm 1 status: 1 = alarm active, 0 = alarm inactive */
#define ADIS16203_DIAG_STAT_ALARM1 BIT(8)
/* Self-test diagnostic error flag */
#define ADIS16203_DIAG_STAT_SELFTEST_FAIL_BIT 5
/* SPI communications failure */
#define ADIS16203_DIAG_STAT_SPI_FAIL_BIT 3
/* Flash update failure */
#define ADIS16203_DIAG_STAT_FLASH_UPT_BIT 2
/* Power supply above 3.625 V */
#define ADIS16203_DIAG_STAT_POWER_HIGH_BIT 1
/* Power supply below 2.975 V */
#define ADIS16203_DIAG_STAT_POWER_LOW_BIT 0
/* GLOB_CMD */
#define ADIS16203_GLOB_CMD_SW_RESET BIT(7)
#define ADIS16203_GLOB_CMD_CLEAR_STAT BIT(4)
#define ADIS16203_GLOB_CMD_FACTORY_CAL BIT(1)
#define ADIS16203_ERROR_ACTIVE BIT(14)
enum adis16203_scan {
ADIS16203_SCAN_INCLI_X,
ADIS16203_SCAN_INCLI_Y,
ADIS16203_SCAN_SUPPLY,
ADIS16203_SCAN_AUX_ADC,
ADIS16203_SCAN_TEMP,
};
#define DRIVER_NAME "adis16203"
static const u8 adis16203_addresses[] = {
[ADIS16203_SCAN_INCLI_X] = ADIS16203_INCL_NULL,
};
static int adis16203_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);
/* currently only one writable parameter which keeps this simple */
u8 addr = adis16203_addresses[chan->scan_index];
return adis_write_reg_16(st, addr, val & 0x3FFF);
}
static int adis16203_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,
ADIS16203_ERROR_ACTIVE, val);
case IIO_CHAN_INFO_SCALE:
switch (chan->type) {
case IIO_VOLTAGE:
if (chan->channel == 0) {
*val = 1;
*val2 = 220000; /* 1.22 mV */
} else {
*val = 0;
*val2 = 610000; /* 0.61 mV */
}
return IIO_VAL_INT_PLUS_MICRO;
case IIO_TEMP:
*val = -470; /* -0.47 C */
*val2 = 0;
return IIO_VAL_INT_PLUS_MICRO;
case IIO_INCLI:
*val = 0;
*val2 = 25000; /* 0.025 degree */
return IIO_VAL_INT_PLUS_MICRO;
default:
return -EINVAL;
}
case IIO_CHAN_INFO_OFFSET:
*val = 25000 / -470 - 1278; /* 25 C = 1278 */
return IIO_VAL_INT;
case IIO_CHAN_INFO_CALIBBIAS:
addr = adis16203_addresses[chan->scan_index];
ret = adis_read_reg_16(st, addr, &val16);
if (ret)
return ret;
*val = sign_extend32(val16, 13);
return IIO_VAL_INT;
default:
return -EINVAL;
}
}
static const struct iio_chan_spec adis16203_channels[] = {
ADIS_SUPPLY_CHAN(ADIS16203_SUPPLY_OUT, ADIS16203_SCAN_SUPPLY, 0, 12),
ADIS_AUX_ADC_CHAN(ADIS16203_AUX_ADC, ADIS16203_SCAN_AUX_ADC, 0, 12),
ADIS_INCLI_CHAN(X, ADIS16203_XINCL_OUT, ADIS16203_SCAN_INCLI_X,
BIT(IIO_CHAN_INFO_CALIBBIAS), 0, 14),
/* Fixme: Not what it appears to be - see data sheet */
ADIS_INCLI_CHAN(Y, ADIS16203_YINCL_OUT, ADIS16203_SCAN_INCLI_Y,
0, 0, 14),
ADIS_TEMP_CHAN(ADIS16203_TEMP_OUT, ADIS16203_SCAN_TEMP, 0, 12),
IIO_CHAN_SOFT_TIMESTAMP(5),
};
static const struct iio_info adis16203_info = {
.read_raw = adis16203_read_raw,
.write_raw = adis16203_write_raw,
.update_scan_mode = adis_update_scan_mode,
};
static const char * const adis16203_status_error_msgs[] = {
[ADIS16203_DIAG_STAT_SELFTEST_FAIL_BIT] = "Self test failure",
[ADIS16203_DIAG_STAT_SPI_FAIL_BIT] = "SPI failure",
[ADIS16203_DIAG_STAT_FLASH_UPT_BIT] = "Flash update failed",
[ADIS16203_DIAG_STAT_POWER_HIGH_BIT] = "Power supply above 3.625V",
[ADIS16203_DIAG_STAT_POWER_LOW_BIT] = "Power supply below 2.975V",
};
static const struct adis_timeout adis16203_timeouts = {
.reset_ms = ADIS16203_STARTUP_DELAY,
.sw_reset_ms = ADIS16203_STARTUP_DELAY,
.self_test_ms = ADIS16203_STARTUP_DELAY
};
static const struct adis_data adis16203_data = {
.read_delay = 20,
.msc_ctrl_reg = ADIS16203_MSC_CTRL,
.glob_cmd_reg = ADIS16203_GLOB_CMD,
.diag_stat_reg = ADIS16203_DIAG_STAT,
.self_test_mask = ADIS16203_MSC_CTRL_SELF_TEST_EN,
.self_test_reg = ADIS16203_MSC_CTRL,
.self_test_no_autoclear = true,
.timeouts = &adis16203_timeouts,
.status_error_msgs = adis16203_status_error_msgs,
.status_error_mask = BIT(ADIS16203_DIAG_STAT_SELFTEST_FAIL_BIT) |
BIT(ADIS16203_DIAG_STAT_SPI_FAIL_BIT) |
BIT(ADIS16203_DIAG_STAT_FLASH_UPT_BIT) |
BIT(ADIS16203_DIAG_STAT_POWER_HIGH_BIT) |
BIT(ADIS16203_DIAG_STAT_POWER_LOW_BIT),
};
static int adis16203_probe(struct spi_device *spi)
{
int ret;
struct iio_dev *indio_dev;
struct adis *st;
/* 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->channels = adis16203_channels;
indio_dev->num_channels = ARRAY_SIZE(adis16203_channels);
indio_dev->info = &adis16203_info;
indio_dev->modes = INDIO_DIRECT_MODE;
ret = adis_init(st, indio_dev, spi, &adis16203_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 adis16203_of_match[] = {
{ .compatible = "adi,adis16203" },
{ },
};
MODULE_DEVICE_TABLE(of, adis16203_of_match);
static struct spi_driver adis16203_driver = {
.driver = {
.name = "adis16203",
.of_match_table = adis16203_of_match,
},
.probe = adis16203_probe,
};
module_spi_driver(adis16203_driver);
MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>");
MODULE_DESCRIPTION("Analog Devices ADIS16203 Programmable 360 Degrees Inclinometer");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("spi:adis16203");
MODULE_IMPORT_NS(IIO_ADISLIB);
