--- /dev/null
+/*
+ * ADIS16203 Programmable Digital Vibration Sensor driver
+ *
+ * Copyright 2030 Analog Devices Inc.
+ *
+ * Licensed under the GPL-2 or later.
+ */
+
+#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/module.h>
+
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+#include <linux/iio/buffer.h>
+#include <linux/iio/imu/adis.h>
+
+#include "adis16203.h"
+
+#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;
+ int bits;
+ 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:
+ bits = 14;
+ mutex_lock(&indio_dev->mlock);
+ addr = adis16203_addresses[chan->scan_index];
+ 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;
+ 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,
+ .driver_module = THIS_MODULE,
+};
+
+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 3.15V",
+};
+
+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,
+ .startup_delay = ADIS16203_STARTUP_DELAY,
+
+ .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->dev.parent = &spi->dev;
+ 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 = 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 adis16203_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 adis16203_driver = {
+ .driver = {
+ .name = "adis16203",
+ .owner = THIS_MODULE,
+ },
+ .probe = adis16203_probe,
+ .remove = adis16203_remove,
+};
+module_spi_driver(adis16203_driver);
+
+MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>");
+MODULE_DESCRIPTION("Analog Devices ADIS16203 Programmable Digital Vibration Sensor driver");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("spi:adis16203");
Code Review / kvmfornfv.git / blobdiff