Adding upstream version 4.19.249.upstream/4.19.249upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 179 insertions, 0 deletions

diff --git a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx.h b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx.h
new file mode 100644
index 000000000..edcd83803
--- /dev/null
+++ b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx.h
@@ -0,0 +1,179 @@
+/*
+ * STMicroelectronics st_lsm6dsx sensor driver
+ *
+ * Copyright 2016 STMicroelectronics Inc.
+ *
+ * Lorenzo Bianconi <lorenzo.bianconi@st.com>
+ * Denis Ciocca <denis.ciocca@st.com>
+ *
+ * Licensed under the GPL-2.
+ */
+
+#ifndef ST_LSM6DSX_H
+#define ST_LSM6DSX_H
+
+#include <linux/device.h>
+
+#define ST_LSM6DS3_DEV_NAME	"lsm6ds3"
+#define ST_LSM6DS3H_DEV_NAME	"lsm6ds3h"
+#define ST_LSM6DSL_DEV_NAME	"lsm6dsl"
+#define ST_LSM6DSM_DEV_NAME	"lsm6dsm"
+#define ST_ISM330DLC_DEV_NAME	"ism330dlc"
+
+enum st_lsm6dsx_hw_id {
+	ST_LSM6DS3_ID,
+	ST_LSM6DS3H_ID,
+	ST_LSM6DSL_ID,
+	ST_LSM6DSM_ID,
+	ST_ISM330DLC_ID,
+	ST_LSM6DSX_MAX_ID,
+};
+
+#define ST_LSM6DSX_BUFF_SIZE		400
+#define ST_LSM6DSX_CHAN_SIZE		2
+#define ST_LSM6DSX_SAMPLE_SIZE		6
+#define ST_LSM6DSX_MAX_WORD_LEN		((32 / ST_LSM6DSX_SAMPLE_SIZE) * \
+					 ST_LSM6DSX_SAMPLE_SIZE)
+#define ST_LSM6DSX_SHIFT_VAL(val, mask)	(((val) << __ffs(mask)) & (mask))
+
+struct st_lsm6dsx_reg {
+	u8 addr;
+	u8 mask;
+};
+
+/**
+ * struct st_lsm6dsx_fifo_ops - ST IMU FIFO settings
+ * @fifo_th: FIFO threshold register info (addr + mask).
+ * @fifo_diff: FIFO diff status register info (addr + mask).
+ * @th_wl: FIFO threshold word length.
+ */
+struct st_lsm6dsx_fifo_ops {
+	struct {
+		u8 addr;
+		u16 mask;
+	} fifo_th;
+	struct {
+		u8 addr;
+		u16 mask;
+	} fifo_diff;
+	u8 th_wl;
+};
+
+/**
+ * struct st_lsm6dsx_hw_ts_settings - ST IMU hw timer settings
+ * @timer_en: Hw timer enable register info (addr + mask).
+ * @hr_timer: Hw timer resolution register info (addr + mask).
+ * @fifo_en: Hw timer FIFO enable register info (addr + mask).
+ * @decimator: Hw timer FIFO decimator register info (addr + mask).
+ */
+struct st_lsm6dsx_hw_ts_settings {
+	struct st_lsm6dsx_reg timer_en;
+	struct st_lsm6dsx_reg hr_timer;
+	struct st_lsm6dsx_reg fifo_en;
+	struct st_lsm6dsx_reg decimator;
+};
+
+/**
+ * struct st_lsm6dsx_settings - ST IMU sensor settings
+ * @wai: Sensor WhoAmI default value.
+ * @max_fifo_size: Sensor max fifo length in FIFO words.
+ * @id: List of hw id supported by the driver configuration.
+ * @decimator: List of decimator register info (addr + mask).
+ * @fifo_ops: Sensor hw FIFO parameters.
+ * @ts_settings: Hw timer related settings.
+ */
+struct st_lsm6dsx_settings {
+	u8 wai;
+	u16 max_fifo_size;
+	enum st_lsm6dsx_hw_id id[ST_LSM6DSX_MAX_ID];
+	struct st_lsm6dsx_reg decimator[ST_LSM6DSX_MAX_ID];
+	struct st_lsm6dsx_fifo_ops fifo_ops;
+	struct st_lsm6dsx_hw_ts_settings ts_settings;
+};
+
+enum st_lsm6dsx_sensor_id {
+	ST_LSM6DSX_ID_ACC,
+	ST_LSM6DSX_ID_GYRO,
+	ST_LSM6DSX_ID_MAX,
+};
+
+enum st_lsm6dsx_fifo_mode {
+	ST_LSM6DSX_FIFO_BYPASS = 0x0,
+	ST_LSM6DSX_FIFO_CONT = 0x6,
+};
+
+/**
+ * struct st_lsm6dsx_sensor - ST IMU sensor instance
+ * @name: Sensor name.
+ * @id: Sensor identifier.
+ * @hw: Pointer to instance of struct st_lsm6dsx_hw.
+ * @gain: Configured sensor sensitivity.
+ * @odr: Output data rate of the sensor [Hz].
+ * @watermark: Sensor watermark level.
+ * @sip: Number of samples in a given pattern.
+ * @decimator: FIFO decimation factor.
+ * @ts_ref: Sensor timestamp reference for hw one.
+ */
+struct st_lsm6dsx_sensor {
+	char name[32];
+	enum st_lsm6dsx_sensor_id id;
+	struct st_lsm6dsx_hw *hw;
+
+	u32 gain;
+	u16 odr;
+
+	u16 watermark;
+	u8 sip;
+	u8 decimator;
+	s64 ts_ref;
+};
+
+/**
+ * struct st_lsm6dsx_hw - ST IMU MEMS hw instance
+ * @dev: Pointer to instance of struct device (I2C or SPI).
+ * @regmap: Register map of the device.
+ * @irq: Device interrupt line (I2C or SPI).
+ * @fifo_lock: Mutex to prevent concurrent access to the hw FIFO.
+ * @conf_lock: Mutex to prevent concurrent FIFO configuration update.
+ * @fifo_mode: FIFO operating mode supported by the device.
+ * @enable_mask: Enabled sensor bitmask.
+ * @ts_sip: Total number of timestamp samples in a given pattern.
+ * @sip: Total number of samples (acc/gyro/ts) in a given pattern.
+ * @buff: Device read buffer.
+ * @iio_devs: Pointers to acc/gyro iio_dev instances.
+ * @settings: Pointer to the specific sensor settings in use.
+ */
+struct st_lsm6dsx_hw {
+	struct device *dev;
+	struct regmap *regmap;
+	int irq;
+
+	struct mutex fifo_lock;
+	struct mutex conf_lock;
+
+	enum st_lsm6dsx_fifo_mode fifo_mode;
+	u8 enable_mask;
+	u8 ts_sip;
+	u8 sip;
+
+	u8 *buff;
+
+	struct iio_dev *iio_devs[ST_LSM6DSX_ID_MAX];
+
+	const struct st_lsm6dsx_settings *settings;
+};
+
+extern const struct dev_pm_ops st_lsm6dsx_pm_ops;
+
+int st_lsm6dsx_probe(struct device *dev, int irq, int hw_id, const char *name,
+		     struct regmap *regmap);
+int st_lsm6dsx_sensor_enable(struct st_lsm6dsx_sensor *sensor);
+int st_lsm6dsx_sensor_disable(struct st_lsm6dsx_sensor *sensor);
+int st_lsm6dsx_fifo_setup(struct st_lsm6dsx_hw *hw);
+int st_lsm6dsx_update_watermark(struct st_lsm6dsx_sensor *sensor,
+				u16 watermark);
+int st_lsm6dsx_flush_fifo(struct st_lsm6dsx_hw *hw);
+int st_lsm6dsx_set_fifo_mode(struct st_lsm6dsx_hw *hw,
+			     enum st_lsm6dsx_fifo_mode fifo_mode);
+
+#endif /* ST_LSM6DSX_H */