spi_bus.h
/*
 * Copyright 2014-2022 Great Scott Gadgets <info@greatscottgadgets.com>
 * Copyright (C) 2014 Jared Boone, ShareBrained Technology, Inc.
 *
 * This file is part of HackRF.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2, or (at your option)
 * any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; see the file COPYING.  If not, write to
 * the Free Software Foundation, Inc., 51 Franklin Street,
 * Boston, MA 02110-1301, USA.
 */

#ifndef __SPI_BUS_H__
#define __SPI_BUS_H__

#include <stddef.h>

typedef struct {
	void* const data;
	const size_t count;
} spi_transfer_t;

struct spi_bus_t;
typedef struct spi_bus_t spi_bus_t;

struct spi_bus_t {
	void* const obj;
	const void* config;
	void (*start)(spi_bus_t* const bus, const void* const config);
	void (*stop)(spi_bus_t* const bus);
	void (*transfer)(spi_bus_t* const bus, void* const data, const size_t count);
	void (*transfer_gather)(
		spi_bus_t* const bus,
		const spi_transfer_t* const transfers,
		const size_t count);
};

void spi_bus_start(spi_bus_t* const bus, const void* const config);
void spi_bus_stop(spi_bus_t* const bus);
void spi_bus_transfer(spi_bus_t* const bus, void* const data, const size_t count);
void spi_bus_transfer_gather(
	spi_bus_t* const bus,
	const spi_transfer_t* const transfers,
	const size_t count);

#endif /*__SPI_BUS_H__*/