--- /dev/null
+/*
+ * ADIS16480 and similar IMUs driver
+ *
+ * Copyright 2012 Analog Devices Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+
+#include <linux/interrupt.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/module.h>
+
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+#include <linux/iio/buffer.h>
+#include <linux/iio/imu/adis.h>
+
+#include <linux/iio/iio.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)
+
+#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))
+
+struct adis16480_chip_info {
+ unsigned int num_channels;
+ const struct iio_chan_spec *channels;
+};
+
+struct adis16480 {
+ const struct adis16480_chip_info *chip_info;
+
+ struct adis adis;
+};
+
+#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[6];
+ size_t len;
+ u16 rev;
+ int ret;
+
+ ret = adis_read_reg_16(&adis16480->adis, ADIS16480_REG_FIRM_REV, &rev);
+ if (ret < 0)
+ return ret;
+
+ len = snprintf(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 < 0)
+ return ret;
+
+ ret = adis_read_reg_16(&adis16480->adis, ADIS16480_REG_FIRM_DM, &md);
+ if (ret < 0)
+ 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 < 0)
+ return ret;
+
+ *val = serial;
+
+ return 0;
+}
+DEFINE_SIMPLE_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 < 0)
+ return ret;
+
+ *val = prod_id;
+
+ return 0;
+}
+DEFINE_SIMPLE_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 < 0)
+ return ret;
+
+ *val = flash_count;
+
+ return 0;
+}
+DEFINE_SIMPLE_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);
+
+ debugfs_create_file("firmware_revision", 0400,
+ indio_dev->debugfs_dentry, adis16480,
+ &adis16480_firmware_revision_fops);
+ debugfs_create_file("firmware_date", 0400, indio_dev->debugfs_dentry,
+ adis16480, &adis16480_firmware_date_fops);
+ debugfs_create_file("serial_number", 0400, indio_dev->debugfs_dentry,
+ adis16480, &adis16480_serial_number_fops);
+ debugfs_create_file("product_id", 0400, indio_dev->debugfs_dentry,
+ adis16480, &adis16480_product_id_fops);
+ debugfs_create_file("flash_count", 0400, indio_dev->debugfs_dentry,
+ 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 adis16480 *st, unsigned int freq)
+{
+ unsigned int t;
+
+ t = 2460000 / freq;
+ if (t > 2048)
+ t = 2048;
+
+ if (t != 0)
+ t--;
+
+ return adis_write_reg_16(&st->adis, ADIS16480_REG_DEC_RATE, t);
+}
+
+static int adis16480_get_freq(struct adis16480 *st, unsigned int *freq)
+{
+ uint16_t t;
+ int ret;
+
+ ret = adis_read_reg_16(&st->adis, ADIS16480_REG_DEC_RATE, &t);
+ if (ret < 0)
+ return ret;
+
+ *freq = 2460000 / (t + 1);
+
+ return 0;
+}
+
+static ssize_t adis16480_read_frequency(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct iio_dev *indio_dev = dev_to_iio_dev(dev);
+ struct adis16480 *st = iio_priv(indio_dev);
+ unsigned int freq;
+ int ret;
+
+ ret = adis16480_get_freq(st, &freq);
+ if (ret < 0)
+ return ret;
+
+ return sprintf(buf, "%d.%.3d\n", freq / 1000, freq % 1000);
+}
+
+static ssize_t adis16480_write_frequency(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf,
+ size_t len)
+{
+ struct iio_dev *indio_dev = dev_to_iio_dev(dev);
+ struct adis16480 *st = iio_priv(indio_dev);
+ int freq_int, freq_fract;
+ long val;
+ int ret;
+
+ ret = iio_str_to_fixpoint(buf, 100, &freq_int, &freq_fract);
+ if (ret)
+ return ret;
+
+ val = freq_int * 1000 + freq_fract;
+
+ if (val <= 0)
+ return -EINVAL;
+
+ ret = adis16480_set_freq(st, val);
+
+ return ret ? ret : len;
+}
+
+static IIO_DEV_ATTR_SAMP_FREQ(S_IWUSR | S_IRUGO,
+ adis16480_read_frequency,
+ adis16480_write_frequency);
+
+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);
+ *bias = sign_extend32(val16, 15);
+ break;
+ case IIO_ANGL_VEL:
+ case IIO_ACCEL:
+ ret = adis_read_reg_32(&st->adis, reg, &val32);
+ *bias = sign_extend32(val32, 31);
+ break;
+ default:
+ ret = -EINVAL;
+ }
+
+ if (ret < 0)
+ 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 < 0)
+ 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 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 < 0)
+ return ret;
+
+ if (!(val & enable_mask))
+ *freq = 0;
+ else
+ *freq = adis16480_def_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);
+
+ ret = adis_read_reg_16(&st->adis, reg, &val);
+ if (ret < 0)
+ return ret;
+
+ if (freq == 0) {
+ val &= ~enable_mask;
+ } else {
+ best_freq = 0;
+ best_diff = 310;
+ for (i = 0; i < ARRAY_SIZE(adis16480_def_filter_freqs); i++) {
+ if (adis16480_def_filter_freqs[i] >= freq) {
+ diff = adis16480_def_filter_freqs[i] - freq;
+ if (diff < best_diff) {
+ best_diff = diff;
+ best_freq = i;
+ }
+ }
+ }
+
+ val &= ~(0x3 << offset);
+ val |= best_freq << offset;
+ val |= enable_mask;
+ }
+
+ return adis_write_reg_16(&st->adis, reg, val);
+}
+
+static int adis16480_read_raw(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan, int *val, int *val2, long info)
+{
+ 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 = 0;
+ *val2 = IIO_DEGREE_TO_RAD(20000); /* 0.02 degree/sec */
+ return IIO_VAL_INT_PLUS_MICRO;
+ case IIO_ACCEL:
+ *val = 0;
+ *val2 = IIO_G_TO_M_S_2(800); /* 0.8 mg */
+ return IIO_VAL_INT_PLUS_MICRO;
+ case IIO_MAGN:
+ *val = 0;
+ *val2 = 100; /* 0.0001 gauss */
+ return IIO_VAL_INT_PLUS_MICRO;
+ case IIO_TEMP:
+ *val = 5;
+ *val2 = 650000; /* 5.65 milli degree Celsius */
+ return IIO_VAL_INT_PLUS_MICRO;
+ case IIO_PRESSURE:
+ *val = 0;
+ *val2 = 4000; /* 40ubar = 0.004 kPa */
+ return IIO_VAL_INT_PLUS_MICRO;
+ default:
+ return -EINVAL;
+ }
+ case IIO_CHAN_INFO_OFFSET:
+ /* Only the temperature channel has a offset */
+ *val = 4425; /* 25 degree Celsius = 0x0000 */
+ 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);
+ 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);
+ default:
+ return -EINVAL;
+ }
+}
+
+#define ADIS16480_MOD_CHANNEL(_type, _mod, _address, _si, _info, _bits) \
+ { \
+ .type = (_type), \
+ .modified = 1, \
+ .channel2 = (_mod), \
+ .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT | \
+ IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT | \
+ IIO_CHAN_INFO_SCALE_SHARED_BIT | \
+ _info, \
+ .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, \
+ IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY_SEPARATE_BIT | \
+ IIO_CHAN_INFO_CALIBSCALE_SEPARATE_BIT, \
+ 32)
+
+#define ADIS16480_ACCEL_CHANNEL(_mod) \
+ ADIS16480_MOD_CHANNEL(IIO_ACCEL, IIO_MOD_ ## _mod, \
+ ADIS16480_REG_ ## _mod ## _ACCEL_OUT, ADIS16480_SCAN_ACCEL_ ## _mod, \
+ IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY_SEPARATE_BIT | \
+ IIO_CHAN_INFO_CALIBSCALE_SEPARATE_BIT, \
+ 32)
+
+#define ADIS16480_MAGN_CHANNEL(_mod) \
+ ADIS16480_MOD_CHANNEL(IIO_MAGN, IIO_MOD_ ## _mod, \
+ ADIS16480_REG_ ## _mod ## _MAGN_OUT, ADIS16480_SCAN_MAGN_ ## _mod, \
+ IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY_SEPARATE_BIT, \
+ 16)
+
+#define ADIS16480_PRESSURE_CHANNEL() \
+ { \
+ .type = IIO_PRESSURE, \
+ .indexed = 1, \
+ .channel = 0, \
+ .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT | \
+ IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT | \
+ IIO_CHAN_INFO_SCALE_SEPARATE_BIT, \
+ .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 = IIO_CHAN_INFO_RAW_SEPARATE_BIT | \
+ IIO_CHAN_INFO_SCALE_SEPARATE_BIT | \
+ IIO_CHAN_INFO_OFFSET_SEPARATE_BIT, \
+ .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,
+};
+
+static const struct adis16480_chip_info adis16480_chip_info[] = {
+ [ADIS16375] = {
+ .channels = adis16485_channels,
+ .num_channels = ARRAY_SIZE(adis16485_channels),
+ },
+ [ADIS16480] = {
+ .channels = adis16480_channels,
+ .num_channels = ARRAY_SIZE(adis16480_channels),
+ },
+ [ADIS16485] = {
+ .channels = adis16485_channels,
+ .num_channels = ARRAY_SIZE(adis16485_channels),
+ },
+ [ADIS16488] = {
+ .channels = adis16480_channels,
+ .num_channels = ARRAY_SIZE(adis16480_channels),
+ },
+};
+
+static struct attribute *adis16480_attributes[] = {
+ &iio_dev_attr_sampling_frequency.dev_attr.attr,
+ NULL
+};
+
+static const struct attribute_group adis16480_attribute_group = {
+ .attrs = adis16480_attributes,
+};
+
+static const struct iio_info adis16480_info = {
+ .attrs = &adis16480_attribute_group,
+ .read_raw = &adis16480_read_raw,
+ .write_raw = &adis16480_write_raw,
+ .update_scan_mode = adis_update_scan_mode,
+ .driver_module = THIS_MODULE,
+};
+
+static int adis16480_stop_device(struct iio_dev *indio_dev)
+{
+ struct adis16480 *st = iio_priv(indio_dev);
+ int ret;
+
+ ret = adis_write_reg_16(&st->adis, ADIS16480_REG_SLP_CNT, BIT(9));
+ if (ret)
+ dev_err(&indio_dev->dev,
+ "Could not power down device: %d\n", ret);
+
+ return ret;
+}
+
+static int adis16480_enable_irq(struct adis *adis, bool enable)
+{
+ return adis_write_reg_16(adis, ADIS16480_REG_FNCTIO_CTRL,
+ enable ? BIT(3) : 0);
+}
+
+static int adis16480_initial_setup(struct iio_dev *indio_dev)
+{
+ struct adis16480 *st = iio_priv(indio_dev);
+ uint16_t prod_id;
+ unsigned int device_id;
+ int ret;
+
+ adis_reset(&st->adis);
+ msleep(70);
+
+ ret = adis_write_reg_16(&st->adis, ADIS16480_REG_GLOB_CMD, BIT(1));
+ if (ret)
+ return ret;
+ msleep(30);
+
+ ret = adis_check_status(&st->adis);
+ if (ret)
+ return ret;
+
+ ret = adis_read_reg_16(&st->adis, ADIS16480_REG_PROD_ID, &prod_id);
+ if (ret)
+ return ret;
+
+ sscanf(indio_dev->name, "adis%u\n", &device_id);
+
+ if (prod_id != device_id)
+ dev_warn(&indio_dev->dev, "Device ID(%u) and product ID(%u) do not match.",
+ device_id, prod_id);
+
+ return 0;
+}
+
+#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 const struct adis_data adis16480_data = {
+ .diag_stat_reg = ADIS16480_REG_DIAG_STS,
+ .glob_cmd_reg = ADIS16480_REG_GLOB_CMD,
+ .has_paging = true,
+
+ .read_delay = 5,
+ .write_delay = 5,
+
+ .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,
+};
+
+static int adis16480_probe(struct spi_device *spi)
+{
+ const struct spi_device_id *id = spi_get_device_id(spi);
+ struct iio_dev *indio_dev;
+ struct adis16480 *st;
+ int ret;
+
+ indio_dev = iio_device_alloc(sizeof(*st));
+ if (indio_dev == NULL)
+ return -ENOMEM;
+
+ spi_set_drvdata(spi, indio_dev);
+
+ st = iio_priv(indio_dev);
+
+ st->chip_info = &adis16480_chip_info[id->driver_data];
+ indio_dev->dev.parent = &spi->dev;
+ 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;
+
+ ret = adis_init(&st->adis, indio_dev, spi, &adis16480_data);
+ if (ret)
+ goto error_free_dev;
+
+ ret = adis_setup_buffer_and_trigger(&st->adis, indio_dev, NULL);
+ if (ret)
+ goto error_free_dev;
+
+ ret = adis16480_initial_setup(indio_dev);
+ if (ret)
+ goto error_cleanup_buffer;
+
+ ret = iio_device_register(indio_dev);
+ if (ret)
+ goto error_stop_device;
+
+ adis16480_debugfs_init(indio_dev);
+
+ return 0;
+
+error_stop_device:
+ adis16480_stop_device(indio_dev);
+error_cleanup_buffer:
+ adis_cleanup_buffer_and_trigger(&st->adis, indio_dev);
+error_free_dev:
+ iio_device_free(indio_dev);
+ return ret;
+}
+
+static int adis16480_remove(struct spi_device *spi)
+{
+ struct iio_dev *indio_dev = spi_get_drvdata(spi);
+ struct adis16480 *st = iio_priv(indio_dev);
+
+ iio_device_unregister(indio_dev);
+ adis16480_stop_device(indio_dev);
+
+ adis_cleanup_buffer_and_trigger(&st->adis, indio_dev);
+
+ iio_device_free(indio_dev);
+
+ return 0;
+}
+
+static const struct spi_device_id adis16480_ids[] = {
+ { "adis16375", ADIS16375 },
+ { "adis16480", ADIS16480 },
+ { "adis16485", ADIS16485 },
+ { "adis16488", ADIS16488 },
+ { }
+};
+MODULE_DEVICE_TABLE(spi, adis16480_ids);
+
+static struct spi_driver adis16480_driver = {
+ .driver = {
+ .name = "adis16480",
+ .owner = THIS_MODULE,
+ },
+ .id_table = adis16480_ids,
+ .probe = adis16480_probe,
+ .remove = adis16480_remove,
+};
+module_spi_driver(adis16480_driver);
+
+MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
+MODULE_DESCRIPTION("Analog Devices ADIS16480 IMU driver");
+MODULE_LICENSE("GPL v2");
projects / GitHub / exynos8895 / android_kernel_samsung_universal8895.git / commitdiff