--- /dev/null
+/*
+ * 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",
+ .owner = THIS_MODULE,
+ },
+ .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");
Code Review / kvmfornfv.git / blobdiff