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 *   Copyright (C) 2012 PX4 Development Team. All rights reserved.
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 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
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 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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/**
 * @file sim.h
 *
 * Base class for devices on simulation bus.
 */

#pragma once

#include "vdev.h"

namespace device __EXPORT
{

/**
 * Abstract class for character device on SIM
 */
class __EXPORT SIM : public Device
{

public:

	/**
	 * Get the address
	 */
	int16_t		get_address() const { return _address; }

protected:
	/**
	 * The number of times a read or write operation will be retried on
	 * error.
	 */
	unsigned		_retries;

	/**
	 * The SIM bus number the device is attached to.
	 */
	int			_bus;

	/**
	 * @ Constructor
	 *
	 * @param name		Driver name
	 * @param devname	Device node name
	 * @param bus		SIM bus on which the device lives
	 * @param address	SIM bus address, or zero if set_address will be used
	 */
	SIM(const char *name,
	    const char *devname,
	    int bus,
	    uint16_t address);
	virtual ~SIM();

	virtual int	init();

	/**
	 * Perform an SIM transaction to the device.
	 *
	 * At least one of send_len and recv_len must be non-zero.
	 *
	 * @param send		Pointer to bytes to send.
	 * @param send_len	Number of bytes to send.
	 * @param recv		Pointer to buffer for bytes received.
	 * @param recv_len	Number of bytes to receive.
	 * @return		OK if the transfer was successful, -errno
	 *			otherwise.
	 */
	virtual int	transfer(const uint8_t *send, unsigned send_len,
				 uint8_t *recv, unsigned recv_len);

private:
	uint16_t		_address;
	const char 		*_devname;

	SIM(const device::SIM &);
	SIM operator=(const device::SIM &);
};

} // namespace device