summaryrefslogtreecommitdiffstats
path: root/drivers/iio/imu/adis16480.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/iio/imu/adis16480.c')
-rw-r--r--drivers/iio/imu/adis16480.c1536
1 files changed, 1536 insertions, 0 deletions
diff --git a/drivers/iio/imu/adis16480.c b/drivers/iio/imu/adis16480.c
new file mode 100644
index 0000000000..fe520194a8
--- /dev/null
+++ b/drivers/iio/imu/adis16480.c
@@ -0,0 +1,1536 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * ADIS16480 and similar IMUs driver
+ *
+ * Copyright 2012 Analog Devices Inc.
+ */
+
+#include <linux/clk.h>
+#include <linux/bitfield.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/math.h>
+#include <linux/device.h>
+#include <linux/kernel.h>
+#include <linux/spi/spi.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/lcm.h>
+#include <linux/property.h>
+#include <linux/swab.h>
+#include <linux/crc32.h>
+
+#include <linux/iio/iio.h>
+#include <linux/iio/buffer.h>
+#include <linux/iio/imu/adis.h>
+#include <linux/iio/trigger_consumer.h>
+
+#include <linux/debugfs.h>
+
+#define ADIS16480_PAGE_SIZE 0x80
+
+#define ADIS16480_REG(page, reg) ((page) * ADIS16480_PAGE_SIZE + (reg))
+
+#define ADIS16480_REG_PAGE_ID 0x00 /* Same address on each page */
+#define ADIS16480_REG_SEQ_CNT ADIS16480_REG(0x00, 0x06)
+#define ADIS16480_REG_SYS_E_FLA ADIS16480_REG(0x00, 0x08)
+#define ADIS16480_REG_DIAG_STS ADIS16480_REG(0x00, 0x0A)
+#define ADIS16480_REG_ALM_STS ADIS16480_REG(0x00, 0x0C)
+#define ADIS16480_REG_TEMP_OUT ADIS16480_REG(0x00, 0x0E)
+#define ADIS16480_REG_X_GYRO_OUT ADIS16480_REG(0x00, 0x10)
+#define ADIS16480_REG_Y_GYRO_OUT ADIS16480_REG(0x00, 0x14)
+#define ADIS16480_REG_Z_GYRO_OUT ADIS16480_REG(0x00, 0x18)
+#define ADIS16480_REG_X_ACCEL_OUT ADIS16480_REG(0x00, 0x1C)
+#define ADIS16480_REG_Y_ACCEL_OUT ADIS16480_REG(0x00, 0x20)
+#define ADIS16480_REG_Z_ACCEL_OUT ADIS16480_REG(0x00, 0x24)
+#define ADIS16480_REG_X_MAGN_OUT ADIS16480_REG(0x00, 0x28)
+#define ADIS16480_REG_Y_MAGN_OUT ADIS16480_REG(0x00, 0x2A)
+#define ADIS16480_REG_Z_MAGN_OUT ADIS16480_REG(0x00, 0x2C)
+#define ADIS16480_REG_BAROM_OUT ADIS16480_REG(0x00, 0x2E)
+#define ADIS16480_REG_X_DELTAANG_OUT ADIS16480_REG(0x00, 0x40)
+#define ADIS16480_REG_Y_DELTAANG_OUT ADIS16480_REG(0x00, 0x44)
+#define ADIS16480_REG_Z_DELTAANG_OUT ADIS16480_REG(0x00, 0x48)
+#define ADIS16480_REG_X_DELTAVEL_OUT ADIS16480_REG(0x00, 0x4C)
+#define ADIS16480_REG_Y_DELTAVEL_OUT ADIS16480_REG(0x00, 0x50)
+#define ADIS16480_REG_Z_DELTAVEL_OUT ADIS16480_REG(0x00, 0x54)
+#define ADIS16480_REG_PROD_ID ADIS16480_REG(0x00, 0x7E)
+
+#define ADIS16480_REG_X_GYRO_SCALE ADIS16480_REG(0x02, 0x04)
+#define ADIS16480_REG_Y_GYRO_SCALE ADIS16480_REG(0x02, 0x06)
+#define ADIS16480_REG_Z_GYRO_SCALE ADIS16480_REG(0x02, 0x08)
+#define ADIS16480_REG_X_ACCEL_SCALE ADIS16480_REG(0x02, 0x0A)
+#define ADIS16480_REG_Y_ACCEL_SCALE ADIS16480_REG(0x02, 0x0C)
+#define ADIS16480_REG_Z_ACCEL_SCALE ADIS16480_REG(0x02, 0x0E)
+#define ADIS16480_REG_X_GYRO_BIAS ADIS16480_REG(0x02, 0x10)
+#define ADIS16480_REG_Y_GYRO_BIAS ADIS16480_REG(0x02, 0x14)
+#define ADIS16480_REG_Z_GYRO_BIAS ADIS16480_REG(0x02, 0x18)
+#define ADIS16480_REG_X_ACCEL_BIAS ADIS16480_REG(0x02, 0x1C)
+#define ADIS16480_REG_Y_ACCEL_BIAS ADIS16480_REG(0x02, 0x20)
+#define ADIS16480_REG_Z_ACCEL_BIAS ADIS16480_REG(0x02, 0x24)
+#define ADIS16480_REG_X_HARD_IRON ADIS16480_REG(0x02, 0x28)
+#define ADIS16480_REG_Y_HARD_IRON ADIS16480_REG(0x02, 0x2A)
+#define ADIS16480_REG_Z_HARD_IRON ADIS16480_REG(0x02, 0x2C)
+#define ADIS16480_REG_BAROM_BIAS ADIS16480_REG(0x02, 0x40)
+#define ADIS16480_REG_FLASH_CNT ADIS16480_REG(0x02, 0x7C)
+
+#define ADIS16480_REG_GLOB_CMD ADIS16480_REG(0x03, 0x02)
+#define ADIS16480_REG_FNCTIO_CTRL ADIS16480_REG(0x03, 0x06)
+#define ADIS16480_REG_GPIO_CTRL ADIS16480_REG(0x03, 0x08)
+#define ADIS16480_REG_CONFIG ADIS16480_REG(0x03, 0x0A)
+#define ADIS16480_REG_DEC_RATE ADIS16480_REG(0x03, 0x0C)
+#define ADIS16480_REG_SLP_CNT ADIS16480_REG(0x03, 0x10)
+#define ADIS16480_REG_FILTER_BNK0 ADIS16480_REG(0x03, 0x16)
+#define ADIS16480_REG_FILTER_BNK1 ADIS16480_REG(0x03, 0x18)
+#define ADIS16480_REG_ALM_CNFG0 ADIS16480_REG(0x03, 0x20)
+#define ADIS16480_REG_ALM_CNFG1 ADIS16480_REG(0x03, 0x22)
+#define ADIS16480_REG_ALM_CNFG2 ADIS16480_REG(0x03, 0x24)
+#define ADIS16480_REG_XG_ALM_MAGN ADIS16480_REG(0x03, 0x28)
+#define ADIS16480_REG_YG_ALM_MAGN ADIS16480_REG(0x03, 0x2A)
+#define ADIS16480_REG_ZG_ALM_MAGN ADIS16480_REG(0x03, 0x2C)
+#define ADIS16480_REG_XA_ALM_MAGN ADIS16480_REG(0x03, 0x2E)
+#define ADIS16480_REG_YA_ALM_MAGN ADIS16480_REG(0x03, 0x30)
+#define ADIS16480_REG_ZA_ALM_MAGN ADIS16480_REG(0x03, 0x32)
+#define ADIS16480_REG_XM_ALM_MAGN ADIS16480_REG(0x03, 0x34)
+#define ADIS16480_REG_YM_ALM_MAGN ADIS16480_REG(0x03, 0x36)
+#define ADIS16480_REG_ZM_ALM_MAGN ADIS16480_REG(0x03, 0x38)
+#define ADIS16480_REG_BR_ALM_MAGN ADIS16480_REG(0x03, 0x3A)
+#define ADIS16480_REG_FIRM_REV ADIS16480_REG(0x03, 0x78)
+#define ADIS16480_REG_FIRM_DM ADIS16480_REG(0x03, 0x7A)
+#define ADIS16480_REG_FIRM_Y ADIS16480_REG(0x03, 0x7C)
+
+/*
+ * External clock scaling in PPS mode.
+ * Available only for ADIS1649x devices
+ */
+#define ADIS16495_REG_SYNC_SCALE ADIS16480_REG(0x03, 0x10)
+#define ADIS16495_REG_BURST_CMD ADIS16480_REG(0x00, 0x7C)
+#define ADIS16495_BURST_ID 0xA5A5
+/* total number of segments in burst */
+#define ADIS16495_BURST_MAX_DATA 20
+/* spi max speed in burst mode */
+#define ADIS16495_BURST_MAX_SPEED 6000000
+
+#define ADIS16480_REG_SERIAL_NUM ADIS16480_REG(0x04, 0x20)
+
+/* Each filter coefficent bank spans two pages */
+#define ADIS16480_FIR_COEF(page) (x < 60 ? ADIS16480_REG(page, (x) + 8) : \
+ ADIS16480_REG((page) + 1, (x) - 60 + 8))
+#define ADIS16480_FIR_COEF_A(x) ADIS16480_FIR_COEF(0x05, (x))
+#define ADIS16480_FIR_COEF_B(x) ADIS16480_FIR_COEF(0x07, (x))
+#define ADIS16480_FIR_COEF_C(x) ADIS16480_FIR_COEF(0x09, (x))
+#define ADIS16480_FIR_COEF_D(x) ADIS16480_FIR_COEF(0x0B, (x))
+
+/* ADIS16480_REG_FNCTIO_CTRL */
+#define ADIS16480_DRDY_SEL_MSK GENMASK(1, 0)
+#define ADIS16480_DRDY_SEL(x) FIELD_PREP(ADIS16480_DRDY_SEL_MSK, x)
+#define ADIS16480_DRDY_POL_MSK BIT(2)
+#define ADIS16480_DRDY_POL(x) FIELD_PREP(ADIS16480_DRDY_POL_MSK, x)
+#define ADIS16480_DRDY_EN_MSK BIT(3)
+#define ADIS16480_DRDY_EN(x) FIELD_PREP(ADIS16480_DRDY_EN_MSK, x)
+#define ADIS16480_SYNC_SEL_MSK GENMASK(5, 4)
+#define ADIS16480_SYNC_SEL(x) FIELD_PREP(ADIS16480_SYNC_SEL_MSK, x)
+#define ADIS16480_SYNC_EN_MSK BIT(7)
+#define ADIS16480_SYNC_EN(x) FIELD_PREP(ADIS16480_SYNC_EN_MSK, x)
+#define ADIS16480_SYNC_MODE_MSK BIT(8)
+#define ADIS16480_SYNC_MODE(x) FIELD_PREP(ADIS16480_SYNC_MODE_MSK, x)
+
+struct adis16480_chip_info {
+ unsigned int num_channels;
+ const struct iio_chan_spec *channels;
+ unsigned int gyro_max_val;
+ unsigned int gyro_max_scale;
+ unsigned int accel_max_val;
+ unsigned int accel_max_scale;
+ unsigned int temp_scale;
+ unsigned int int_clk;
+ unsigned int max_dec_rate;
+ const unsigned int *filter_freqs;
+ bool has_pps_clk_mode;
+ bool has_sleep_cnt;
+ const struct adis_data adis_data;
+};
+
+enum adis16480_int_pin {
+ ADIS16480_PIN_DIO1,
+ ADIS16480_PIN_DIO2,
+ ADIS16480_PIN_DIO3,
+ ADIS16480_PIN_DIO4
+};
+
+enum adis16480_clock_mode {
+ ADIS16480_CLK_SYNC,
+ ADIS16480_CLK_PPS,
+ ADIS16480_CLK_INT
+};
+
+struct adis16480 {
+ const struct adis16480_chip_info *chip_info;
+
+ struct adis adis;
+ struct clk *ext_clk;
+ enum adis16480_clock_mode clk_mode;
+ unsigned int clk_freq;
+ /* Alignment needed for the timestamp */
+ __be16 data[ADIS16495_BURST_MAX_DATA] __aligned(8);
+};
+
+static const char * const adis16480_int_pin_names[4] = {
+ [ADIS16480_PIN_DIO1] = "DIO1",
+ [ADIS16480_PIN_DIO2] = "DIO2",
+ [ADIS16480_PIN_DIO3] = "DIO3",
+ [ADIS16480_PIN_DIO4] = "DIO4",
+};
+
+static bool low_rate_allow;
+module_param(low_rate_allow, bool, 0444);
+MODULE_PARM_DESC(low_rate_allow,
+ "Allow IMU rates below the minimum advisable when external clk is used in PPS mode (default: N)");
+
+#ifdef CONFIG_DEBUG_FS
+
+static ssize_t adis16480_show_firmware_revision(struct file *file,
+ char __user *userbuf, size_t count, loff_t *ppos)
+{
+ struct adis16480 *adis16480 = file->private_data;
+ char buf[7];
+ size_t len;
+ u16 rev;
+ int ret;
+
+ ret = adis_read_reg_16(&adis16480->adis, ADIS16480_REG_FIRM_REV, &rev);
+ if (ret)
+ return ret;
+
+ len = scnprintf(buf, sizeof(buf), "%x.%x\n", rev >> 8, rev & 0xff);
+
+ return simple_read_from_buffer(userbuf, count, ppos, buf, len);
+}
+
+static const struct file_operations adis16480_firmware_revision_fops = {
+ .open = simple_open,
+ .read = adis16480_show_firmware_revision,
+ .llseek = default_llseek,
+ .owner = THIS_MODULE,
+};
+
+static ssize_t adis16480_show_firmware_date(struct file *file,
+ char __user *userbuf, size_t count, loff_t *ppos)
+{
+ struct adis16480 *adis16480 = file->private_data;
+ u16 md, year;
+ char buf[12];
+ size_t len;
+ int ret;
+
+ ret = adis_read_reg_16(&adis16480->adis, ADIS16480_REG_FIRM_Y, &year);
+ if (ret)
+ return ret;
+
+ ret = adis_read_reg_16(&adis16480->adis, ADIS16480_REG_FIRM_DM, &md);
+ if (ret)
+ return ret;
+
+ len = snprintf(buf, sizeof(buf), "%.2x-%.2x-%.4x\n",
+ md >> 8, md & 0xff, year);
+
+ return simple_read_from_buffer(userbuf, count, ppos, buf, len);
+}
+
+static const struct file_operations adis16480_firmware_date_fops = {
+ .open = simple_open,
+ .read = adis16480_show_firmware_date,
+ .llseek = default_llseek,
+ .owner = THIS_MODULE,
+};
+
+static int adis16480_show_serial_number(void *arg, u64 *val)
+{
+ struct adis16480 *adis16480 = arg;
+ u16 serial;
+ int ret;
+
+ ret = adis_read_reg_16(&adis16480->adis, ADIS16480_REG_SERIAL_NUM,
+ &serial);
+ if (ret)
+ return ret;
+
+ *val = serial;
+
+ return 0;
+}
+DEFINE_DEBUGFS_ATTRIBUTE(adis16480_serial_number_fops,
+ adis16480_show_serial_number, NULL, "0x%.4llx\n");
+
+static int adis16480_show_product_id(void *arg, u64 *val)
+{
+ struct adis16480 *adis16480 = arg;
+ u16 prod_id;
+ int ret;
+
+ ret = adis_read_reg_16(&adis16480->adis, ADIS16480_REG_PROD_ID,
+ &prod_id);
+ if (ret)
+ return ret;
+
+ *val = prod_id;
+
+ return 0;
+}
+DEFINE_DEBUGFS_ATTRIBUTE(adis16480_product_id_fops,
+ adis16480_show_product_id, NULL, "%llu\n");
+
+static int adis16480_show_flash_count(void *arg, u64 *val)
+{
+ struct adis16480 *adis16480 = arg;
+ u32 flash_count;
+ int ret;
+
+ ret = adis_read_reg_32(&adis16480->adis, ADIS16480_REG_FLASH_CNT,
+ &flash_count);
+ if (ret)
+ return ret;
+
+ *val = flash_count;
+
+ return 0;
+}
+DEFINE_DEBUGFS_ATTRIBUTE(adis16480_flash_count_fops,
+ adis16480_show_flash_count, NULL, "%lld\n");
+
+static int adis16480_debugfs_init(struct iio_dev *indio_dev)
+{
+ struct adis16480 *adis16480 = iio_priv(indio_dev);
+ struct dentry *d = iio_get_debugfs_dentry(indio_dev);
+
+ debugfs_create_file_unsafe("firmware_revision", 0400,
+ d, adis16480, &adis16480_firmware_revision_fops);
+ debugfs_create_file_unsafe("firmware_date", 0400,
+ d, adis16480, &adis16480_firmware_date_fops);
+ debugfs_create_file_unsafe("serial_number", 0400,
+ d, adis16480, &adis16480_serial_number_fops);
+ debugfs_create_file_unsafe("product_id", 0400,
+ d, adis16480, &adis16480_product_id_fops);
+ debugfs_create_file_unsafe("flash_count", 0400,
+ d, adis16480, &adis16480_flash_count_fops);
+
+ return 0;
+}
+
+#else
+
+static int adis16480_debugfs_init(struct iio_dev *indio_dev)
+{
+ return 0;
+}
+
+#endif
+
+static int adis16480_set_freq(struct iio_dev *indio_dev, int val, int val2)
+{
+ struct adis16480 *st = iio_priv(indio_dev);
+ unsigned int t, sample_rate = st->clk_freq;
+ int ret;
+
+ if (val < 0 || val2 < 0)
+ return -EINVAL;
+
+ t = val * 1000 + val2 / 1000;
+ if (t == 0)
+ return -EINVAL;
+
+ adis_dev_lock(&st->adis);
+ /*
+ * When using PPS mode, the input clock needs to be scaled so that we have an IMU
+ * sample rate between (optimally) 4000 and 4250. After this, we can use the
+ * decimation filter to lower the sampling rate in order to get what the user wants.
+ * Optimally, the user sample rate is a multiple of both the IMU sample rate and
+ * the input clock. Hence, calculating the sync_scale dynamically gives us better
+ * chances of achieving a perfect/integer value for DEC_RATE. The math here is:
+ * 1. lcm of the input clock and the desired output rate.
+ * 2. get the highest multiple of the previous result lower than the adis max rate.
+ * 3. The last result becomes the IMU sample rate. Use that to calculate SYNC_SCALE
+ * and DEC_RATE (to get the user output rate)
+ */
+ if (st->clk_mode == ADIS16480_CLK_PPS) {
+ unsigned long scaled_rate = lcm(st->clk_freq, t);
+ int sync_scale;
+
+ /*
+ * If lcm is bigger than the IMU maximum sampling rate there's no perfect
+ * solution. In this case, we get the highest multiple of the input clock
+ * lower than the IMU max sample rate.
+ */
+ if (scaled_rate > st->chip_info->int_clk)
+ scaled_rate = st->chip_info->int_clk / st->clk_freq * st->clk_freq;
+ else
+ scaled_rate = st->chip_info->int_clk / scaled_rate * scaled_rate;
+
+ /*
+ * This is not an hard requirement but it's not advised to run the IMU
+ * with a sample rate lower than 4000Hz due to possible undersampling
+ * issues. However, there are users that might really want to take the risk.
+ * Hence, we provide a module parameter for them. If set, we allow sample
+ * rates lower than 4KHz. By default, we won't allow this and we just roundup
+ * the rate to the next multiple of the input clock bigger than 4KHz. This
+ * is done like this as in some cases (when DEC_RATE is 0) might give
+ * us the closest value to the one desired by the user...
+ */
+ if (scaled_rate < 4000000 && !low_rate_allow)
+ scaled_rate = roundup(4000000, st->clk_freq);
+
+ sync_scale = scaled_rate / st->clk_freq;
+ ret = __adis_write_reg_16(&st->adis, ADIS16495_REG_SYNC_SCALE, sync_scale);
+ if (ret)
+ goto error;
+
+ sample_rate = scaled_rate;
+ }
+
+ t = DIV_ROUND_CLOSEST(sample_rate, t);
+ if (t)
+ t--;
+
+ if (t > st->chip_info->max_dec_rate)
+ t = st->chip_info->max_dec_rate;
+
+ ret = __adis_write_reg_16(&st->adis, ADIS16480_REG_DEC_RATE, t);
+error:
+ adis_dev_unlock(&st->adis);
+ return ret;
+}
+
+static int adis16480_get_freq(struct iio_dev *indio_dev, int *val, int *val2)
+{
+ struct adis16480 *st = iio_priv(indio_dev);
+ uint16_t t;
+ int ret;
+ unsigned int freq, sample_rate = st->clk_freq;
+
+ adis_dev_lock(&st->adis);
+
+ if (st->clk_mode == ADIS16480_CLK_PPS) {
+ u16 sync_scale;
+
+ ret = __adis_read_reg_16(&st->adis, ADIS16495_REG_SYNC_SCALE, &sync_scale);
+ if (ret)
+ goto error;
+
+ sample_rate = st->clk_freq * sync_scale;
+ }
+
+ ret = __adis_read_reg_16(&st->adis, ADIS16480_REG_DEC_RATE, &t);
+ if (ret)
+ goto error;
+
+ adis_dev_unlock(&st->adis);
+
+ freq = DIV_ROUND_CLOSEST(sample_rate, (t + 1));
+
+ *val = freq / 1000;
+ *val2 = (freq % 1000) * 1000;
+
+ return IIO_VAL_INT_PLUS_MICRO;
+error:
+ adis_dev_unlock(&st->adis);
+ return ret;
+}
+
+enum {
+ ADIS16480_SCAN_GYRO_X,
+ ADIS16480_SCAN_GYRO_Y,
+ ADIS16480_SCAN_GYRO_Z,
+ ADIS16480_SCAN_ACCEL_X,
+ ADIS16480_SCAN_ACCEL_Y,
+ ADIS16480_SCAN_ACCEL_Z,
+ ADIS16480_SCAN_MAGN_X,
+ ADIS16480_SCAN_MAGN_Y,
+ ADIS16480_SCAN_MAGN_Z,
+ ADIS16480_SCAN_BARO,
+ ADIS16480_SCAN_TEMP,
+};
+
+static const unsigned int adis16480_calibbias_regs[] = {
+ [ADIS16480_SCAN_GYRO_X] = ADIS16480_REG_X_GYRO_BIAS,
+ [ADIS16480_SCAN_GYRO_Y] = ADIS16480_REG_Y_GYRO_BIAS,
+ [ADIS16480_SCAN_GYRO_Z] = ADIS16480_REG_Z_GYRO_BIAS,
+ [ADIS16480_SCAN_ACCEL_X] = ADIS16480_REG_X_ACCEL_BIAS,
+ [ADIS16480_SCAN_ACCEL_Y] = ADIS16480_REG_Y_ACCEL_BIAS,
+ [ADIS16480_SCAN_ACCEL_Z] = ADIS16480_REG_Z_ACCEL_BIAS,
+ [ADIS16480_SCAN_MAGN_X] = ADIS16480_REG_X_HARD_IRON,
+ [ADIS16480_SCAN_MAGN_Y] = ADIS16480_REG_Y_HARD_IRON,
+ [ADIS16480_SCAN_MAGN_Z] = ADIS16480_REG_Z_HARD_IRON,
+ [ADIS16480_SCAN_BARO] = ADIS16480_REG_BAROM_BIAS,
+};
+
+static const unsigned int adis16480_calibscale_regs[] = {
+ [ADIS16480_SCAN_GYRO_X] = ADIS16480_REG_X_GYRO_SCALE,
+ [ADIS16480_SCAN_GYRO_Y] = ADIS16480_REG_Y_GYRO_SCALE,
+ [ADIS16480_SCAN_GYRO_Z] = ADIS16480_REG_Z_GYRO_SCALE,
+ [ADIS16480_SCAN_ACCEL_X] = ADIS16480_REG_X_ACCEL_SCALE,
+ [ADIS16480_SCAN_ACCEL_Y] = ADIS16480_REG_Y_ACCEL_SCALE,
+ [ADIS16480_SCAN_ACCEL_Z] = ADIS16480_REG_Z_ACCEL_SCALE,
+};
+
+static int adis16480_set_calibbias(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan, int bias)
+{
+ unsigned int reg = adis16480_calibbias_regs[chan->scan_index];
+ struct adis16480 *st = iio_priv(indio_dev);
+
+ switch (chan->type) {
+ case IIO_MAGN:
+ case IIO_PRESSURE:
+ if (bias < -0x8000 || bias >= 0x8000)
+ return -EINVAL;
+ return adis_write_reg_16(&st->adis, reg, bias);
+ case IIO_ANGL_VEL:
+ case IIO_ACCEL:
+ return adis_write_reg_32(&st->adis, reg, bias);
+ default:
+ break;
+ }
+
+ return -EINVAL;
+}
+
+static int adis16480_get_calibbias(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan, int *bias)
+{
+ unsigned int reg = adis16480_calibbias_regs[chan->scan_index];
+ struct adis16480 *st = iio_priv(indio_dev);
+ uint16_t val16;
+ uint32_t val32;
+ int ret;
+
+ switch (chan->type) {
+ case IIO_MAGN:
+ case IIO_PRESSURE:
+ ret = adis_read_reg_16(&st->adis, reg, &val16);
+ if (ret == 0)
+ *bias = sign_extend32(val16, 15);
+ break;
+ case IIO_ANGL_VEL:
+ case IIO_ACCEL:
+ ret = adis_read_reg_32(&st->adis, reg, &val32);
+ if (ret == 0)
+ *bias = sign_extend32(val32, 31);
+ break;
+ default:
+ ret = -EINVAL;
+ }
+
+ if (ret)
+ return ret;
+
+ return IIO_VAL_INT;
+}
+
+static int adis16480_set_calibscale(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan, int scale)
+{
+ unsigned int reg = adis16480_calibscale_regs[chan->scan_index];
+ struct adis16480 *st = iio_priv(indio_dev);
+
+ if (scale < -0x8000 || scale >= 0x8000)
+ return -EINVAL;
+
+ return adis_write_reg_16(&st->adis, reg, scale);
+}
+
+static int adis16480_get_calibscale(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan, int *scale)
+{
+ unsigned int reg = adis16480_calibscale_regs[chan->scan_index];
+ struct adis16480 *st = iio_priv(indio_dev);
+ uint16_t val16;
+ int ret;
+
+ ret = adis_read_reg_16(&st->adis, reg, &val16);
+ if (ret)
+ return ret;
+
+ *scale = sign_extend32(val16, 15);
+ return IIO_VAL_INT;
+}
+
+static const unsigned int adis16480_def_filter_freqs[] = {
+ 310,
+ 55,
+ 275,
+ 63,
+};
+
+static const unsigned int adis16495_def_filter_freqs[] = {
+ 300,
+ 100,
+ 300,
+ 100,
+};
+
+static const unsigned int ad16480_filter_data[][2] = {
+ [ADIS16480_SCAN_GYRO_X] = { ADIS16480_REG_FILTER_BNK0, 0 },
+ [ADIS16480_SCAN_GYRO_Y] = { ADIS16480_REG_FILTER_BNK0, 3 },
+ [ADIS16480_SCAN_GYRO_Z] = { ADIS16480_REG_FILTER_BNK0, 6 },
+ [ADIS16480_SCAN_ACCEL_X] = { ADIS16480_REG_FILTER_BNK0, 9 },
+ [ADIS16480_SCAN_ACCEL_Y] = { ADIS16480_REG_FILTER_BNK0, 12 },
+ [ADIS16480_SCAN_ACCEL_Z] = { ADIS16480_REG_FILTER_BNK1, 0 },
+ [ADIS16480_SCAN_MAGN_X] = { ADIS16480_REG_FILTER_BNK1, 3 },
+ [ADIS16480_SCAN_MAGN_Y] = { ADIS16480_REG_FILTER_BNK1, 6 },
+ [ADIS16480_SCAN_MAGN_Z] = { ADIS16480_REG_FILTER_BNK1, 9 },
+};
+
+static int adis16480_get_filter_freq(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan, int *freq)
+{
+ struct adis16480 *st = iio_priv(indio_dev);
+ unsigned int enable_mask, offset, reg;
+ uint16_t val;
+ int ret;
+
+ reg = ad16480_filter_data[chan->scan_index][0];
+ offset = ad16480_filter_data[chan->scan_index][1];
+ enable_mask = BIT(offset + 2);
+
+ ret = adis_read_reg_16(&st->adis, reg, &val);
+ if (ret)
+ return ret;
+
+ if (!(val & enable_mask))
+ *freq = 0;
+ else
+ *freq = st->chip_info->filter_freqs[(val >> offset) & 0x3];
+
+ return IIO_VAL_INT;
+}
+
+static int adis16480_set_filter_freq(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan, unsigned int freq)
+{
+ struct adis16480 *st = iio_priv(indio_dev);
+ unsigned int enable_mask, offset, reg;
+ unsigned int diff, best_diff;
+ unsigned int i, best_freq;
+ uint16_t val;
+ int ret;
+
+ reg = ad16480_filter_data[chan->scan_index][0];
+ offset = ad16480_filter_data[chan->scan_index][1];
+ enable_mask = BIT(offset + 2);
+
+ adis_dev_lock(&st->adis);
+
+ ret = __adis_read_reg_16(&st->adis, reg, &val);
+ if (ret)
+ goto out_unlock;
+
+ if (freq == 0) {
+ val &= ~enable_mask;
+ } else {
+ best_freq = 0;
+ best_diff = st->chip_info->filter_freqs[0];
+ for (i = 0; i < ARRAY_SIZE(adis16480_def_filter_freqs); i++) {
+ if (st->chip_info->filter_freqs[i] >= freq) {
+ diff = st->chip_info->filter_freqs[i] - freq;
+ if (diff < best_diff) {
+ best_diff = diff;
+ best_freq = i;
+ }
+ }
+ }
+
+ val &= ~(0x3 << offset);
+ val |= best_freq << offset;
+ val |= enable_mask;
+ }
+
+ ret = __adis_write_reg_16(&st->adis, reg, val);
+out_unlock:
+ adis_dev_unlock(&st->adis);
+
+ return ret;
+}
+
+static int adis16480_read_raw(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan, int *val, int *val2, long info)
+{
+ struct adis16480 *st = iio_priv(indio_dev);
+ unsigned int temp;
+
+ switch (info) {
+ case IIO_CHAN_INFO_RAW:
+ return adis_single_conversion(indio_dev, chan, 0, val);
+ case IIO_CHAN_INFO_SCALE:
+ switch (chan->type) {
+ case IIO_ANGL_VEL:
+ *val = st->chip_info->gyro_max_scale;
+ *val2 = st->chip_info->gyro_max_val;
+ return IIO_VAL_FRACTIONAL;
+ case IIO_ACCEL:
+ *val = st->chip_info->accel_max_scale;
+ *val2 = st->chip_info->accel_max_val;
+ return IIO_VAL_FRACTIONAL;
+ case IIO_MAGN:
+ *val = 0;
+ *val2 = 100; /* 0.0001 gauss */
+ return IIO_VAL_INT_PLUS_MICRO;
+ case IIO_TEMP:
+ /*
+ * +85 degrees Celsius = temp_max_scale
+ * +25 degrees Celsius = 0
+ * LSB, 25 degrees Celsius = 60 / temp_max_scale
+ */
+ *val = st->chip_info->temp_scale / 1000;
+ *val2 = (st->chip_info->temp_scale % 1000) * 1000;
+ return IIO_VAL_INT_PLUS_MICRO;
+ case IIO_PRESSURE:
+ /*
+ * max scale is 1310 mbar
+ * max raw value is 32767 shifted for 32bits
+ */
+ *val = 131; /* 1310mbar = 131 kPa */
+ *val2 = 32767 << 16;
+ return IIO_VAL_FRACTIONAL;
+ default:
+ return -EINVAL;
+ }
+ case IIO_CHAN_INFO_OFFSET:
+ /* Only the temperature channel has a offset */
+ temp = 25 * 1000000LL; /* 25 degree Celsius = 0x0000 */
+ *val = DIV_ROUND_CLOSEST_ULL(temp, st->chip_info->temp_scale);
+ return IIO_VAL_INT;
+ case IIO_CHAN_INFO_CALIBBIAS:
+ return adis16480_get_calibbias(indio_dev, chan, val);
+ case IIO_CHAN_INFO_CALIBSCALE:
+ return adis16480_get_calibscale(indio_dev, chan, val);
+ case IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY:
+ return adis16480_get_filter_freq(indio_dev, chan, val);
+ case IIO_CHAN_INFO_SAMP_FREQ:
+ return adis16480_get_freq(indio_dev, val, val2);
+ default:
+ return -EINVAL;
+ }
+}
+
+static int adis16480_write_raw(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan, int val, int val2, long info)
+{
+ switch (info) {
+ case IIO_CHAN_INFO_CALIBBIAS:
+ return adis16480_set_calibbias(indio_dev, chan, val);
+ case IIO_CHAN_INFO_CALIBSCALE:
+ return adis16480_set_calibscale(indio_dev, chan, val);
+ case IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY:
+ return adis16480_set_filter_freq(indio_dev, chan, val);
+ case IIO_CHAN_INFO_SAMP_FREQ:
+ return adis16480_set_freq(indio_dev, val, val2);
+
+ default:
+ return -EINVAL;
+ }
+}
+
+#define ADIS16480_MOD_CHANNEL(_type, _mod, _address, _si, _info_sep, _bits) \
+ { \
+ .type = (_type), \
+ .modified = 1, \
+ .channel2 = (_mod), \
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \
+ BIT(IIO_CHAN_INFO_CALIBBIAS) | \
+ _info_sep, \
+ .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE), \
+ .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ), \
+ .address = (_address), \
+ .scan_index = (_si), \
+ .scan_type = { \
+ .sign = 's', \
+ .realbits = (_bits), \
+ .storagebits = (_bits), \
+ .endianness = IIO_BE, \
+ }, \
+ }
+
+#define ADIS16480_GYRO_CHANNEL(_mod) \
+ ADIS16480_MOD_CHANNEL(IIO_ANGL_VEL, IIO_MOD_ ## _mod, \
+ ADIS16480_REG_ ## _mod ## _GYRO_OUT, ADIS16480_SCAN_GYRO_ ## _mod, \
+ BIT(IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY) | \
+ BIT(IIO_CHAN_INFO_CALIBSCALE), \
+ 32)
+
+#define ADIS16480_ACCEL_CHANNEL(_mod) \
+ ADIS16480_MOD_CHANNEL(IIO_ACCEL, IIO_MOD_ ## _mod, \
+ ADIS16480_REG_ ## _mod ## _ACCEL_OUT, ADIS16480_SCAN_ACCEL_ ## _mod, \
+ BIT(IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY) | \
+ BIT(IIO_CHAN_INFO_CALIBSCALE), \
+ 32)
+
+#define ADIS16480_MAGN_CHANNEL(_mod) \
+ ADIS16480_MOD_CHANNEL(IIO_MAGN, IIO_MOD_ ## _mod, \
+ ADIS16480_REG_ ## _mod ## _MAGN_OUT, ADIS16480_SCAN_MAGN_ ## _mod, \
+ BIT(IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY), \
+ 16)
+
+#define ADIS16480_PRESSURE_CHANNEL() \
+ { \
+ .type = IIO_PRESSURE, \
+ .indexed = 1, \
+ .channel = 0, \
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \
+ BIT(IIO_CHAN_INFO_CALIBBIAS) | \
+ BIT(IIO_CHAN_INFO_SCALE), \
+ .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ), \
+ .address = ADIS16480_REG_BAROM_OUT, \
+ .scan_index = ADIS16480_SCAN_BARO, \
+ .scan_type = { \
+ .sign = 's', \
+ .realbits = 32, \
+ .storagebits = 32, \
+ .endianness = IIO_BE, \
+ }, \
+ }
+
+#define ADIS16480_TEMP_CHANNEL() { \
+ .type = IIO_TEMP, \
+ .indexed = 1, \
+ .channel = 0, \
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \
+ BIT(IIO_CHAN_INFO_SCALE) | \
+ BIT(IIO_CHAN_INFO_OFFSET), \
+ .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ), \
+ .address = ADIS16480_REG_TEMP_OUT, \
+ .scan_index = ADIS16480_SCAN_TEMP, \
+ .scan_type = { \
+ .sign = 's', \
+ .realbits = 16, \
+ .storagebits = 16, \
+ .endianness = IIO_BE, \
+ }, \
+ }
+
+static const struct iio_chan_spec adis16480_channels[] = {
+ ADIS16480_GYRO_CHANNEL(X),
+ ADIS16480_GYRO_CHANNEL(Y),
+ ADIS16480_GYRO_CHANNEL(Z),
+ ADIS16480_ACCEL_CHANNEL(X),
+ ADIS16480_ACCEL_CHANNEL(Y),
+ ADIS16480_ACCEL_CHANNEL(Z),
+ ADIS16480_MAGN_CHANNEL(X),
+ ADIS16480_MAGN_CHANNEL(Y),
+ ADIS16480_MAGN_CHANNEL(Z),
+ ADIS16480_PRESSURE_CHANNEL(),
+ ADIS16480_TEMP_CHANNEL(),
+ IIO_CHAN_SOFT_TIMESTAMP(11)
+};
+
+static const struct iio_chan_spec adis16485_channels[] = {
+ ADIS16480_GYRO_CHANNEL(X),
+ ADIS16480_GYRO_CHANNEL(Y),
+ ADIS16480_GYRO_CHANNEL(Z),
+ ADIS16480_ACCEL_CHANNEL(X),
+ ADIS16480_ACCEL_CHANNEL(Y),
+ ADIS16480_ACCEL_CHANNEL(Z),
+ ADIS16480_TEMP_CHANNEL(),
+ IIO_CHAN_SOFT_TIMESTAMP(7)
+};
+
+enum adis16480_variant {
+ ADIS16375,
+ ADIS16480,
+ ADIS16485,
+ ADIS16488,
+ ADIS16490,
+ ADIS16495_1,
+ ADIS16495_2,
+ ADIS16495_3,
+ ADIS16497_1,
+ ADIS16497_2,
+ ADIS16497_3,
+};
+
+#define ADIS16480_DIAG_STAT_XGYRO_FAIL 0
+#define ADIS16480_DIAG_STAT_YGYRO_FAIL 1
+#define ADIS16480_DIAG_STAT_ZGYRO_FAIL 2
+#define ADIS16480_DIAG_STAT_XACCL_FAIL 3
+#define ADIS16480_DIAG_STAT_YACCL_FAIL 4
+#define ADIS16480_DIAG_STAT_ZACCL_FAIL 5
+#define ADIS16480_DIAG_STAT_XMAGN_FAIL 8
+#define ADIS16480_DIAG_STAT_YMAGN_FAIL 9
+#define ADIS16480_DIAG_STAT_ZMAGN_FAIL 10
+#define ADIS16480_DIAG_STAT_BARO_FAIL 11
+
+static const char * const adis16480_status_error_msgs[] = {
+ [ADIS16480_DIAG_STAT_XGYRO_FAIL] = "X-axis gyroscope self-test failure",
+ [ADIS16480_DIAG_STAT_YGYRO_FAIL] = "Y-axis gyroscope self-test failure",
+ [ADIS16480_DIAG_STAT_ZGYRO_FAIL] = "Z-axis gyroscope self-test failure",
+ [ADIS16480_DIAG_STAT_XACCL_FAIL] = "X-axis accelerometer self-test failure",
+ [ADIS16480_DIAG_STAT_YACCL_FAIL] = "Y-axis accelerometer self-test failure",
+ [ADIS16480_DIAG_STAT_ZACCL_FAIL] = "Z-axis accelerometer self-test failure",
+ [ADIS16480_DIAG_STAT_XMAGN_FAIL] = "X-axis magnetometer self-test failure",
+ [ADIS16480_DIAG_STAT_YMAGN_FAIL] = "Y-axis magnetometer self-test failure",
+ [ADIS16480_DIAG_STAT_ZMAGN_FAIL] = "Z-axis magnetometer self-test failure",
+ [ADIS16480_DIAG_STAT_BARO_FAIL] = "Barometer self-test failure",
+};
+
+static int adis16480_enable_irq(struct adis *adis, bool enable);
+
+#define ADIS16480_DATA(_prod_id, _timeouts, _burst_len) \
+{ \
+ .diag_stat_reg = ADIS16480_REG_DIAG_STS, \
+ .glob_cmd_reg = ADIS16480_REG_GLOB_CMD, \
+ .prod_id_reg = ADIS16480_REG_PROD_ID, \
+ .prod_id = (_prod_id), \
+ .has_paging = true, \
+ .read_delay = 5, \
+ .write_delay = 5, \
+ .self_test_mask = BIT(1), \
+ .self_test_reg = ADIS16480_REG_GLOB_CMD, \
+ .status_error_msgs = adis16480_status_error_msgs, \
+ .status_error_mask = BIT(ADIS16480_DIAG_STAT_XGYRO_FAIL) | \
+ BIT(ADIS16480_DIAG_STAT_YGYRO_FAIL) | \
+ BIT(ADIS16480_DIAG_STAT_ZGYRO_FAIL) | \
+ BIT(ADIS16480_DIAG_STAT_XACCL_FAIL) | \
+ BIT(ADIS16480_DIAG_STAT_YACCL_FAIL) | \
+ BIT(ADIS16480_DIAG_STAT_ZACCL_FAIL) | \
+ BIT(ADIS16480_DIAG_STAT_XMAGN_FAIL) | \
+ BIT(ADIS16480_DIAG_STAT_YMAGN_FAIL) | \
+ BIT(ADIS16480_DIAG_STAT_ZMAGN_FAIL) | \
+ BIT(ADIS16480_DIAG_STAT_BARO_FAIL), \
+ .enable_irq = adis16480_enable_irq, \
+ .timeouts = (_timeouts), \
+ .burst_reg_cmd = ADIS16495_REG_BURST_CMD, \
+ .burst_len = (_burst_len), \
+ .burst_max_speed_hz = ADIS16495_BURST_MAX_SPEED \
+}
+
+static const struct adis_timeout adis16485_timeouts = {
+ .reset_ms = 560,
+ .sw_reset_ms = 120,
+ .self_test_ms = 12,
+};
+
+static const struct adis_timeout adis16480_timeouts = {
+ .reset_ms = 560,
+ .sw_reset_ms = 560,
+ .self_test_ms = 12,
+};
+
+static const struct adis_timeout adis16495_timeouts = {
+ .reset_ms = 170,
+ .sw_reset_ms = 130,
+ .self_test_ms = 40,
+};
+
+static const struct adis_timeout adis16495_1_timeouts = {
+ .reset_ms = 250,
+ .sw_reset_ms = 210,
+ .self_test_ms = 20,
+};
+
+static const struct adis16480_chip_info adis16480_chip_info[] = {
+ [ADIS16375] = {
+ .channels = adis16485_channels,
+ .num_channels = ARRAY_SIZE(adis16485_channels),
+ /*
+ * Typically we do IIO_RAD_TO_DEGREE in the denominator, which
+ * is exactly the same as IIO_DEGREE_TO_RAD in numerator, since
+ * it gives better approximation. However, in this case we
+ * cannot do it since it would not fit in a 32bit variable.
+ */
+ .gyro_max_val = 22887 << 16,
+ .gyro_max_scale = IIO_DEGREE_TO_RAD(300),
+ .accel_max_val = IIO_M_S_2_TO_G(21973 << 16),
+ .accel_max_scale = 18,
+ .temp_scale = 5650, /* 5.65 milli degree Celsius */
+ .int_clk = 2460000,
+ .max_dec_rate = 2048,
+ .has_sleep_cnt = true,
+ .filter_freqs = adis16480_def_filter_freqs,
+ .adis_data = ADIS16480_DATA(16375, &adis16485_timeouts, 0),
+ },
+ [ADIS16480] = {
+ .channels = adis16480_channels,
+ .num_channels = ARRAY_SIZE(adis16480_channels),
+ .gyro_max_val = 22500 << 16,
+ .gyro_max_scale = IIO_DEGREE_TO_RAD(450),
+ .accel_max_val = IIO_M_S_2_TO_G(12500 << 16),
+ .accel_max_scale = 10,
+ .temp_scale = 5650, /* 5.65 milli degree Celsius */
+ .int_clk = 2460000,
+ .max_dec_rate = 2048,
+ .has_sleep_cnt = true,
+ .filter_freqs = adis16480_def_filter_freqs,
+ .adis_data = ADIS16480_DATA(16480, &adis16480_timeouts, 0),
+ },
+ [ADIS16485] = {
+ .channels = adis16485_channels,
+ .num_channels = ARRAY_SIZE(adis16485_channels),
+ .gyro_max_val = 22500 << 16,
+ .gyro_max_scale = IIO_DEGREE_TO_RAD(450),
+ .accel_max_val = IIO_M_S_2_TO_G(20000 << 16),
+ .accel_max_scale = 5,
+ .temp_scale = 5650, /* 5.65 milli degree Celsius */
+ .int_clk = 2460000,
+ .max_dec_rate = 2048,
+ .has_sleep_cnt = true,
+ .filter_freqs = adis16480_def_filter_freqs,
+ .adis_data = ADIS16480_DATA(16485, &adis16485_timeouts, 0),
+ },
+ [ADIS16488] = {
+ .channels = adis16480_channels,
+ .num_channels = ARRAY_SIZE(adis16480_channels),
+ .gyro_max_val = 22500 << 16,
+ .gyro_max_scale = IIO_DEGREE_TO_RAD(450),
+ .accel_max_val = IIO_M_S_2_TO_G(22500 << 16),
+ .accel_max_scale = 18,
+ .temp_scale = 5650, /* 5.65 milli degree Celsius */
+ .int_clk = 2460000,
+ .max_dec_rate = 2048,
+ .has_sleep_cnt = true,
+ .filter_freqs = adis16480_def_filter_freqs,
+ .adis_data = ADIS16480_DATA(16488, &adis16485_timeouts, 0),
+ },
+ [ADIS16490] = {
+ .channels = adis16485_channels,
+ .num_channels = ARRAY_SIZE(adis16485_channels),
+ .gyro_max_val = 20000 << 16,
+ .gyro_max_scale = IIO_DEGREE_TO_RAD(100),
+ .accel_max_val = IIO_M_S_2_TO_G(16000 << 16),
+ .accel_max_scale = 8,
+ .temp_scale = 14285, /* 14.285 milli degree Celsius */
+ .int_clk = 4250000,
+ .max_dec_rate = 4250,
+ .filter_freqs = adis16495_def_filter_freqs,
+ .has_pps_clk_mode = true,
+ .adis_data = ADIS16480_DATA(16490, &adis16495_timeouts, 0),
+ },
+ [ADIS16495_1] = {
+ .channels = adis16485_channels,
+ .num_channels = ARRAY_SIZE(adis16485_channels),
+ .gyro_max_val = 20000 << 16,
+ .gyro_max_scale = IIO_DEGREE_TO_RAD(125),
+ .accel_max_val = IIO_M_S_2_TO_G(32000 << 16),
+ .accel_max_scale = 8,
+ .temp_scale = 12500, /* 12.5 milli degree Celsius */
+ .int_clk = 4250000,
+ .max_dec_rate = 4250,
+ .filter_freqs = adis16495_def_filter_freqs,
+ .has_pps_clk_mode = true,
+ /* 20 elements of 16bits */
+ .adis_data = ADIS16480_DATA(16495, &adis16495_1_timeouts,
+ ADIS16495_BURST_MAX_DATA * 2),
+ },
+ [ADIS16495_2] = {
+ .channels = adis16485_channels,
+ .num_channels = ARRAY_SIZE(adis16485_channels),
+ .gyro_max_val = 18000 << 16,
+ .gyro_max_scale = IIO_DEGREE_TO_RAD(450),
+ .accel_max_val = IIO_M_S_2_TO_G(32000 << 16),
+ .accel_max_scale = 8,
+ .temp_scale = 12500, /* 12.5 milli degree Celsius */
+ .int_clk = 4250000,
+ .max_dec_rate = 4250,
+ .filter_freqs = adis16495_def_filter_freqs,
+ .has_pps_clk_mode = true,
+ /* 20 elements of 16bits */
+ .adis_data = ADIS16480_DATA(16495, &adis16495_1_timeouts,
+ ADIS16495_BURST_MAX_DATA * 2),
+ },
+ [ADIS16495_3] = {
+ .channels = adis16485_channels,
+ .num_channels = ARRAY_SIZE(adis16485_channels),
+ .gyro_max_val = 20000 << 16,
+ .gyro_max_scale = IIO_DEGREE_TO_RAD(2000),
+ .accel_max_val = IIO_M_S_2_TO_G(32000 << 16),
+ .accel_max_scale = 8,
+ .temp_scale = 12500, /* 12.5 milli degree Celsius */
+ .int_clk = 4250000,
+ .max_dec_rate = 4250,
+ .filter_freqs = adis16495_def_filter_freqs,
+ .has_pps_clk_mode = true,
+ /* 20 elements of 16bits */
+ .adis_data = ADIS16480_DATA(16495, &adis16495_1_timeouts,
+ ADIS16495_BURST_MAX_DATA * 2),
+ },
+ [ADIS16497_1] = {
+ .channels = adis16485_channels,
+ .num_channels = ARRAY_SIZE(adis16485_channels),
+ .gyro_max_val = 20000 << 16,
+ .gyro_max_scale = IIO_DEGREE_TO_RAD(125),
+ .accel_max_val = IIO_M_S_2_TO_G(32000 << 16),
+ .accel_max_scale = 40,
+ .temp_scale = 12500, /* 12.5 milli degree Celsius */
+ .int_clk = 4250000,
+ .max_dec_rate = 4250,
+ .filter_freqs = adis16495_def_filter_freqs,
+ .has_pps_clk_mode = true,
+ /* 20 elements of 16bits */
+ .adis_data = ADIS16480_DATA(16497, &adis16495_1_timeouts,
+ ADIS16495_BURST_MAX_DATA * 2),
+ },
+ [ADIS16497_2] = {
+ .channels = adis16485_channels,
+ .num_channels = ARRAY_SIZE(adis16485_channels),
+ .gyro_max_val = 18000 << 16,
+ .gyro_max_scale = IIO_DEGREE_TO_RAD(450),
+ .accel_max_val = IIO_M_S_2_TO_G(32000 << 16),
+ .accel_max_scale = 40,
+ .temp_scale = 12500, /* 12.5 milli degree Celsius */
+ .int_clk = 4250000,
+ .max_dec_rate = 4250,
+ .filter_freqs = adis16495_def_filter_freqs,
+ .has_pps_clk_mode = true,
+ /* 20 elements of 16bits */
+ .adis_data = ADIS16480_DATA(16497, &adis16495_1_timeouts,
+ ADIS16495_BURST_MAX_DATA * 2),
+ },
+ [ADIS16497_3] = {
+ .channels = adis16485_channels,
+ .num_channels = ARRAY_SIZE(adis16485_channels),
+ .gyro_max_val = 20000 << 16,
+ .gyro_max_scale = IIO_DEGREE_TO_RAD(2000),
+ .accel_max_val = IIO_M_S_2_TO_G(32000 << 16),
+ .accel_max_scale = 40,
+ .temp_scale = 12500, /* 12.5 milli degree Celsius */
+ .int_clk = 4250000,
+ .max_dec_rate = 4250,
+ .filter_freqs = adis16495_def_filter_freqs,
+ .has_pps_clk_mode = true,
+ /* 20 elements of 16bits */
+ .adis_data = ADIS16480_DATA(16497, &adis16495_1_timeouts,
+ ADIS16495_BURST_MAX_DATA * 2),
+ },
+};
+
+static bool adis16480_validate_crc(const u16 *buf, const u8 n_elem, const u32 crc)
+{
+ u32 crc_calc;
+ u16 crc_buf[15];
+ int j;
+
+ for (j = 0; j < n_elem; j++)
+ crc_buf[j] = swab16(buf[j]);
+
+ crc_calc = crc32(~0, crc_buf, n_elem * 2);
+ crc_calc ^= ~0;
+
+ return (crc == crc_calc);
+}
+
+static irqreturn_t adis16480_trigger_handler(int irq, void *p)
+{
+ struct iio_poll_func *pf = p;
+ struct iio_dev *indio_dev = pf->indio_dev;
+ struct adis16480 *st = iio_priv(indio_dev);
+ struct adis *adis = &st->adis;
+ struct device *dev = &adis->spi->dev;
+ int ret, bit, offset, i = 0;
+ __be16 *buffer;
+ u32 crc;
+ bool valid;
+
+ adis_dev_lock(adis);
+ if (adis->current_page != 0) {
+ adis->tx[0] = ADIS_WRITE_REG(ADIS_REG_PAGE_ID);
+ adis->tx[1] = 0;
+ ret = spi_write(adis->spi, adis->tx, 2);
+ if (ret) {
+ dev_err(dev, "Failed to change device page: %d\n", ret);
+ adis_dev_unlock(adis);
+ goto irq_done;
+ }
+
+ adis->current_page = 0;
+ }
+
+ ret = spi_sync(adis->spi, &adis->msg);
+ if (ret) {
+ dev_err(dev, "Failed to read data: %d\n", ret);
+ adis_dev_unlock(adis);
+ goto irq_done;
+ }
+
+ adis_dev_unlock(adis);
+
+ /*
+ * After making the burst request, the response can have one or two
+ * 16-bit responses containing the BURST_ID depending on the sclk. If
+ * clk > 3.6MHz, then we will have two BURST_ID in a row. If clk < 3MHZ,
+ * we have only one. To manage that variation, we use the transition from the
+ * BURST_ID to the SYS_E_FLAG register, which will not be equal to 0xA5A5. If
+ * we not find this variation in the first 4 segments, then the data should
+ * not be valid.
+ */
+ buffer = adis->buffer;
+ for (offset = 0; offset < 4; offset++) {
+ u16 curr = be16_to_cpu(buffer[offset]);
+ u16 next = be16_to_cpu(buffer[offset + 1]);
+
+ if (curr == ADIS16495_BURST_ID && next != ADIS16495_BURST_ID) {
+ offset++;
+ break;
+ }
+ }
+
+ if (offset == 4) {
+ dev_err(dev, "Invalid burst data\n");
+ goto irq_done;
+ }
+
+ crc = be16_to_cpu(buffer[offset + 16]) << 16 | be16_to_cpu(buffer[offset + 15]);
+ valid = adis16480_validate_crc((u16 *)&buffer[offset], 15, crc);
+ if (!valid) {
+ dev_err(dev, "Invalid crc\n");
+ goto irq_done;
+ }
+
+ for_each_set_bit(bit, indio_dev->active_scan_mask, indio_dev->masklength) {
+ /*
+ * When burst mode is used, temperature is the first data
+ * channel in the sequence, but the temperature scan index
+ * is 10.
+ */
+ switch (bit) {
+ case ADIS16480_SCAN_TEMP:
+ st->data[i++] = buffer[offset + 1];
+ break;
+ case ADIS16480_SCAN_GYRO_X ... ADIS16480_SCAN_ACCEL_Z:
+ /* The lower register data is sequenced first */
+ st->data[i++] = buffer[2 * bit + offset + 3];
+ st->data[i++] = buffer[2 * bit + offset + 2];
+ break;
+ }
+ }
+
+ iio_push_to_buffers_with_timestamp(indio_dev, st->data, pf->timestamp);
+irq_done:
+ iio_trigger_notify_done(indio_dev->trig);
+
+ return IRQ_HANDLED;
+}
+
+static const struct iio_info adis16480_info = {
+ .read_raw = &adis16480_read_raw,
+ .write_raw = &adis16480_write_raw,
+ .update_scan_mode = adis_update_scan_mode,
+ .debugfs_reg_access = adis_debugfs_reg_access,
+};
+
+static int adis16480_stop_device(struct iio_dev *indio_dev)
+{
+ struct adis16480 *st = iio_priv(indio_dev);
+ struct device *dev = &st->adis.spi->dev;
+ int ret;
+
+ ret = adis_write_reg_16(&st->adis, ADIS16480_REG_SLP_CNT, BIT(9));
+ if (ret)
+ dev_err(dev, "Could not power down device: %d\n", ret);
+
+ return ret;
+}
+
+static int adis16480_enable_irq(struct adis *adis, bool enable)
+{
+ uint16_t val;
+ int ret;
+
+ ret = __adis_read_reg_16(adis, ADIS16480_REG_FNCTIO_CTRL, &val);
+ if (ret)
+ return ret;
+
+ val &= ~ADIS16480_DRDY_EN_MSK;
+ val |= ADIS16480_DRDY_EN(enable);
+
+ return __adis_write_reg_16(adis, ADIS16480_REG_FNCTIO_CTRL, val);
+}
+
+static int adis16480_config_irq_pin(struct adis16480 *st)
+{
+ struct device *dev = &st->adis.spi->dev;
+ struct fwnode_handle *fwnode = dev_fwnode(dev);
+ struct irq_data *desc;
+ enum adis16480_int_pin pin;
+ unsigned int irq_type;
+ uint16_t val;
+ int i, irq = 0;
+
+ desc = irq_get_irq_data(st->adis.spi->irq);
+ if (!desc) {
+ dev_err(dev, "Could not find IRQ %d\n", irq);
+ return -EINVAL;
+ }
+
+ /* Disable data ready since the default after reset is on */
+ val = ADIS16480_DRDY_EN(0);
+
+ /*
+ * Get the interrupt from the devicetre by reading the interrupt-names
+ * property. If it is not specified, use DIO1 pin as default.
+ * According to the datasheet, the factory default assigns DIO2 as data
+ * ready signal. However, in the previous versions of the driver, DIO1
+ * pin was used. So, we should leave it as is since some devices might
+ * be expecting the interrupt on the wrong physical pin.
+ */
+ pin = ADIS16480_PIN_DIO1;
+ for (i = 0; i < ARRAY_SIZE(adis16480_int_pin_names); i++) {
+ irq = fwnode_irq_get_byname(fwnode, adis16480_int_pin_names[i]);
+ if (irq > 0) {
+ pin = i;
+ break;
+ }
+ }
+
+ val |= ADIS16480_DRDY_SEL(pin);
+
+ /*
+ * Get the interrupt line behaviour. The data ready polarity can be
+ * configured as positive or negative, corresponding to
+ * IRQ_TYPE_EDGE_RISING or IRQ_TYPE_EDGE_FALLING respectively.
+ */
+ irq_type = irqd_get_trigger_type(desc);
+ if (irq_type == IRQ_TYPE_EDGE_RISING) { /* Default */
+ val |= ADIS16480_DRDY_POL(1);
+ } else if (irq_type == IRQ_TYPE_EDGE_FALLING) {
+ val |= ADIS16480_DRDY_POL(0);
+ } else {
+ dev_err(dev, "Invalid interrupt type 0x%x specified\n", irq_type);
+ return -EINVAL;
+ }
+ /* Write the data ready configuration to the FNCTIO_CTRL register */
+ return adis_write_reg_16(&st->adis, ADIS16480_REG_FNCTIO_CTRL, val);
+}
+
+static int adis16480_fw_get_ext_clk_pin(struct adis16480 *st)
+{
+ struct device *dev = &st->adis.spi->dev;
+ const char *ext_clk_pin;
+ enum adis16480_int_pin pin;
+ int i;
+
+ pin = ADIS16480_PIN_DIO2;
+ if (device_property_read_string(dev, "adi,ext-clk-pin", &ext_clk_pin))
+ goto clk_input_not_found;
+
+ for (i = 0; i < ARRAY_SIZE(adis16480_int_pin_names); i++) {
+ if (strcasecmp(ext_clk_pin, adis16480_int_pin_names[i]) == 0)
+ return i;
+ }
+
+clk_input_not_found:
+ dev_info(dev, "clk input line not specified, using DIO2\n");
+ return pin;
+}
+
+static int adis16480_ext_clk_config(struct adis16480 *st, bool enable)
+{
+ struct device *dev = &st->adis.spi->dev;
+ unsigned int mode, mask;
+ enum adis16480_int_pin pin;
+ uint16_t val;
+ int ret;
+
+ ret = adis_read_reg_16(&st->adis, ADIS16480_REG_FNCTIO_CTRL, &val);
+ if (ret)
+ return ret;
+
+ pin = adis16480_fw_get_ext_clk_pin(st);
+ /*
+ * Each DIOx pin supports only one function at a time. When a single pin
+ * has two assignments, the enable bit for a lower priority function
+ * automatically resets to zero (disabling the lower priority function).
+ */
+ if (pin == ADIS16480_DRDY_SEL(val))
+ dev_warn(dev, "DIO%x pin supports only one function at a time\n", pin + 1);
+
+ mode = ADIS16480_SYNC_EN(enable) | ADIS16480_SYNC_SEL(pin);
+ mask = ADIS16480_SYNC_EN_MSK | ADIS16480_SYNC_SEL_MSK;
+ /* Only ADIS1649x devices support pps ext clock mode */
+ if (st->chip_info->has_pps_clk_mode) {
+ mode |= ADIS16480_SYNC_MODE(st->clk_mode);
+ mask |= ADIS16480_SYNC_MODE_MSK;
+ }
+
+ val &= ~mask;
+ val |= mode;
+
+ ret = adis_write_reg_16(&st->adis, ADIS16480_REG_FNCTIO_CTRL, val);
+ if (ret)
+ return ret;
+
+ return clk_prepare_enable(st->ext_clk);
+}
+
+static int adis16480_get_ext_clocks(struct adis16480 *st)
+{
+ struct device *dev = &st->adis.spi->dev;
+
+ st->ext_clk = devm_clk_get_optional(dev, "sync");
+ if (IS_ERR(st->ext_clk))
+ return dev_err_probe(dev, PTR_ERR(st->ext_clk), "failed to get ext clk\n");
+ if (st->ext_clk) {
+ st->clk_mode = ADIS16480_CLK_SYNC;
+ return 0;
+ }
+
+ if (st->chip_info->has_pps_clk_mode) {
+ st->ext_clk = devm_clk_get_optional(dev, "pps");
+ if (IS_ERR(st->ext_clk))
+ return dev_err_probe(dev, PTR_ERR(st->ext_clk), "failed to get ext clk\n");
+ if (st->ext_clk) {
+ st->clk_mode = ADIS16480_CLK_PPS;
+ return 0;
+ }
+ }
+
+ st->clk_mode = ADIS16480_CLK_INT;
+ return 0;
+}
+
+static void adis16480_stop(void *data)
+{
+ adis16480_stop_device(data);
+}
+
+static void adis16480_clk_disable(void *data)
+{
+ clk_disable_unprepare(data);
+}
+
+static int adis16480_probe(struct spi_device *spi)
+{
+ const struct spi_device_id *id = spi_get_device_id(spi);
+ const struct adis_data *adis16480_data;
+ irq_handler_t trigger_handler = NULL;
+ struct device *dev = &spi->dev;
+ struct iio_dev *indio_dev;
+ struct adis16480 *st;
+ int ret;
+
+ indio_dev = devm_iio_device_alloc(dev, sizeof(*st));
+ if (indio_dev == NULL)
+ return -ENOMEM;
+
+ st = iio_priv(indio_dev);
+
+ st->chip_info = &adis16480_chip_info[id->driver_data];
+ indio_dev->name = spi_get_device_id(spi)->name;
+ indio_dev->channels = st->chip_info->channels;
+ indio_dev->num_channels = st->chip_info->num_channels;
+ indio_dev->info = &adis16480_info;
+ indio_dev->modes = INDIO_DIRECT_MODE;
+
+ adis16480_data = &st->chip_info->adis_data;
+
+ ret = adis_init(&st->adis, indio_dev, spi, adis16480_data);
+ if (ret)
+ return ret;
+
+ ret = __adis_initial_startup(&st->adis);
+ if (ret)
+ return ret;
+
+ if (st->chip_info->has_sleep_cnt) {
+ ret = devm_add_action_or_reset(dev, adis16480_stop, indio_dev);
+ if (ret)
+ return ret;
+ }
+
+ ret = adis16480_config_irq_pin(st);
+ if (ret)
+ return ret;
+
+ ret = adis16480_get_ext_clocks(st);
+ if (ret)
+ return ret;
+
+ if (st->ext_clk) {
+ ret = adis16480_ext_clk_config(st, true);
+ if (ret)
+ return ret;
+
+ ret = devm_add_action_or_reset(dev, adis16480_clk_disable, st->ext_clk);
+ if (ret)
+ return ret;
+
+ st->clk_freq = clk_get_rate(st->ext_clk);
+ st->clk_freq *= 1000; /* micro */
+ if (st->clk_mode == ADIS16480_CLK_PPS) {
+ u16 sync_scale;
+
+ /*
+ * In PPS mode, the IMU sample rate is the clk_freq * sync_scale. Hence,
+ * default the IMU sample rate to the highest multiple of the input clock
+ * lower than the IMU max sample rate. The internal sample rate is the
+ * max...
+ */
+ sync_scale = st->chip_info->int_clk / st->clk_freq;
+ ret = __adis_write_reg_16(&st->adis, ADIS16495_REG_SYNC_SCALE, sync_scale);
+ if (ret)
+ return ret;
+ }
+ } else {
+ st->clk_freq = st->chip_info->int_clk;
+ }
+
+ /* Only use our trigger handler if burst mode is supported */
+ if (adis16480_data->burst_len)
+ trigger_handler = adis16480_trigger_handler;
+
+ ret = devm_adis_setup_buffer_and_trigger(&st->adis, indio_dev,
+ trigger_handler);
+ if (ret)
+ return ret;
+
+ ret = devm_iio_device_register(dev, indio_dev);
+ if (ret)
+ return ret;
+
+ adis16480_debugfs_init(indio_dev);
+
+ return 0;
+}
+
+static const struct spi_device_id adis16480_ids[] = {
+ { "adis16375", ADIS16375 },
+ { "adis16480", ADIS16480 },
+ { "adis16485", ADIS16485 },
+ { "adis16488", ADIS16488 },
+ { "adis16490", ADIS16490 },
+ { "adis16495-1", ADIS16495_1 },
+ { "adis16495-2", ADIS16495_2 },
+ { "adis16495-3", ADIS16495_3 },
+ { "adis16497-1", ADIS16497_1 },
+ { "adis16497-2", ADIS16497_2 },
+ { "adis16497-3", ADIS16497_3 },
+ { }
+};
+MODULE_DEVICE_TABLE(spi, adis16480_ids);
+
+static const struct of_device_id adis16480_of_match[] = {
+ { .compatible = "adi,adis16375" },
+ { .compatible = "adi,adis16480" },
+ { .compatible = "adi,adis16485" },
+ { .compatible = "adi,adis16488" },
+ { .compatible = "adi,adis16490" },
+ { .compatible = "adi,adis16495-1" },
+ { .compatible = "adi,adis16495-2" },
+ { .compatible = "adi,adis16495-3" },
+ { .compatible = "adi,adis16497-1" },
+ { .compatible = "adi,adis16497-2" },
+ { .compatible = "adi,adis16497-3" },
+ { },
+};
+MODULE_DEVICE_TABLE(of, adis16480_of_match);
+
+static struct spi_driver adis16480_driver = {
+ .driver = {
+ .name = "adis16480",
+ .of_match_table = adis16480_of_match,
+ },
+ .id_table = adis16480_ids,
+ .probe = adis16480_probe,
+};
+module_spi_driver(adis16480_driver);
+
+MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
+MODULE_DESCRIPTION("Analog Devices ADIS16480 IMU driver");
+MODULE_LICENSE("GPL v2");
+MODULE_IMPORT_NS(IIO_ADISLIB);