blob: 3ab678734c1744418bcfed1dd37c016c047c2300 [file] [log] [blame]
/* 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_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 {
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);