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-rw-r--r--drivers/staging/iio/accel/adis16240.c459
1 files changed, 459 insertions, 0 deletions
diff --git a/drivers/staging/iio/accel/adis16240.c b/drivers/staging/iio/accel/adis16240.c
new file mode 100644
index 0000000..109cd94
--- /dev/null
+++ b/drivers/staging/iio/accel/adis16240.c
@@ -0,0 +1,459 @@
+/*
+ * 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/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 3.15 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;
+ 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;
+ addr = adis16240_addresses[chan->scan_index][0];
+ ret = adis_read_reg_16(st, addr, &val16);
+ if (ret)
+ return ret;
+ val16 &= (1 << bits) - 1;
+ val16 = (s16)(val16 << (16 - bits)) >> (16 - bits);
+ *val = val16;
+ return IIO_VAL_INT;
+ case IIO_CHAN_INFO_PEAK:
+ bits = 10;
+ addr = adis16240_addresses[chan->scan_index][1];
+ ret = adis_read_reg_16(st, addr, &val16);
+ if (ret)
+ return ret;
+ val16 &= (1 << bits) - 1;
+ val16 = (s16)(val16 << (16 - bits)) >> (16 - bits);
+ *val = val16;
+ 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,
+ .self_test_no_autoclear = true,
+ .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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