Orange Pi5 kernel

/* SPDX-License-Identifier: GPL-2.0-only */
/*
 * ---------------------------------------------------------------------------
 * drivers/nfc/st95hf/spi.h functions declarations for SPI communication
 * ---------------------------------------------------------------------------
 * Copyright (C) 2015 STMicroelectronics – All Rights Reserved
 */
 
#ifndef __LINUX_ST95HF_SPI_H
#define __LINUX_ST95HF_SPI_H
 
#include <linux/spi/spi.h>
 
/* Basic ST95HF SPI CMDs */
#define ST95HF_COMMAND_SEND	0x0
#define ST95HF_COMMAND_RESET	0x1
#define ST95HF_COMMAND_RECEIVE	0x2
 
#define ST95HF_RESET_CMD_LEN	0x1
 
/*
 * structure to contain st95hf spi communication specific information.
 * @req_issync: true for synchronous calls.
 * @spidev: st95hf spi device object.
 * @done: completion structure to wait for st95hf response
 *	for synchronous calls.
 * @spi_lock: mutex to allow only one spi transfer at a time.
 */
struct st95hf_spi_context {
<------>bool req_issync;
<------>struct spi_device *spidev;
<------>struct completion done;
<------>struct mutex spi_lock;
};
 
/* flag to differentiate synchronous & asynchronous spi request */
enum req_type {
<------>SYNC,
<------>ASYNC,
};
 
int st95hf_spi_send(struct st95hf_spi_context *spicontext,
<------><------>    unsigned char *buffertx,
<------><------>    int datalen,
<------><------>    enum req_type reqtype);
 
int st95hf_spi_recv_response(struct st95hf_spi_context *spicontext,
<------><------><------>     unsigned char *receivebuff);
 
int st95hf_spi_recv_echo_res(struct st95hf_spi_context *spicontext,
<------><------><------>     unsigned char *receivebuff);
 
#endif