Orange Pi5 kernel

/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
 * Copyright (C) 2020 Invensense, Inc.
 */
 
#ifndef INV_ICM42600_BUFFER_H_
#define INV_ICM42600_BUFFER_H_
 
#include <linux/kernel.h>
#include <linux/bits.h>
 
struct inv_icm42600_state;
 
#define INV_ICM42600_SENSOR_GYRO	BIT(0)
#define INV_ICM42600_SENSOR_ACCEL	BIT(1)
#define INV_ICM42600_SENSOR_TEMP	BIT(2)
 
/**
 * struct inv_icm42600_fifo - FIFO state variables
 * @on:		reference counter for FIFO on.
 * @en:		bits field of INV_ICM42600_SENSOR_* for FIFO EN bits.
 * @period:	FIFO internal period.
 * @watermark:	watermark configuration values for accel and gyro.
 * @count:	number of bytes in the FIFO data buffer.
 * @nb:		gyro, accel and total samples in the FIFO data buffer.
 * @data:	FIFO data buffer aligned for DMA (2kB + 32 bytes of read cache).
 */
struct inv_icm42600_fifo {
<------>unsigned int on;
<------>unsigned int en;
<------>uint32_t period;
<------>struct {
<------><------>unsigned int gyro;
<------><------>unsigned int accel;
<------>} watermark;
<------>size_t count;
<------>struct {
<------><------>size_t gyro;
<------><------>size_t accel;
<------><------>size_t total;
<------>} nb;
<------>uint8_t data[2080] ____cacheline_aligned;
};
 
/* FIFO data packet */
struct inv_icm42600_fifo_sensor_data {
<------>__be16 x;
<------>__be16 y;
<------>__be16 z;
} __packed;
#define INV_ICM42600_FIFO_DATA_INVALID		-32768
 
static inline int16_t inv_icm42600_fifo_get_sensor_data(__be16 d)
{
<------>return be16_to_cpu(d);
}
 
static inline bool
inv_icm42600_fifo_is_data_valid(const struct inv_icm42600_fifo_sensor_data *s)
{
<------>int16_t x, y, z;
 
<------>x = inv_icm42600_fifo_get_sensor_data(s->x);
<------>y = inv_icm42600_fifo_get_sensor_data(s->y);
<------>z = inv_icm42600_fifo_get_sensor_data(s->z);
 
<------>if (x == INV_ICM42600_FIFO_DATA_INVALID &&
<------>    y == INV_ICM42600_FIFO_DATA_INVALID &&
<------>    z == INV_ICM42600_FIFO_DATA_INVALID)
<------><------>return false;
 
<------>return true;
}
 
ssize_t inv_icm42600_fifo_decode_packet(const void *packet, const void **accel,
<------><------><------><------><------>const void **gyro, const int8_t **temp,
<------><------><------><------><------>const void **timestamp, unsigned int *odr);
 
extern const struct iio_buffer_setup_ops inv_icm42600_buffer_ops;
 
int inv_icm42600_buffer_init(struct inv_icm42600_state *st);
 
void inv_icm42600_buffer_update_fifo_period(struct inv_icm42600_state *st);
 
int inv_icm42600_buffer_set_fifo_en(struct inv_icm42600_state *st,
<------><------><------><------>    unsigned int fifo_en);
 
int inv_icm42600_buffer_update_watermark(struct inv_icm42600_state *st);
 
int inv_icm42600_buffer_fifo_read(struct inv_icm42600_state *st,
<------><------><------><------>  unsigned int max);
 
int inv_icm42600_buffer_fifo_parse(struct inv_icm42600_state *st);
 
int inv_icm42600_buffer_hwfifo_flush(struct inv_icm42600_state *st,
<------><------><------><------>     unsigned int count);
 
#endif