genode/repos/os/include/gpio_session/gpio_session.h

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/*
* \brief Gpio session interface
* \author Ivan Loskutov <ivan.loskutov@ksyslabs.org>
* \author Stefan Kalkowski <stefan.kalkowski@genode-labs.com>
* \date 2012-06-23
*/
/*
* Copyright (C) 2012 Ksys Labs LLC
* Copyright (C) 2012-2015 Genode Labs GmbH
*
* This file is part of the Genode OS framework, which is distributed
* under the terms of the GNU General Public License version 2.
*/
#ifndef _INCLUDE__GPIO_SESSION__GPIO_SESSION_H_
#define _INCLUDE__GPIO_SESSION__GPIO_SESSION_H_
#include <base/signal.h>
#include <dataspace/capability.h>
#include <session/session.h>
#include <irq_session/capability.h>
namespace Gpio { struct Session; }
struct Gpio::Session : Genode::Session
{
static const char *service_name() { return "Gpio"; }
enum Direction { IN, OUT };
enum Irq_type { LOW_LEVEL, HIGH_LEVEL, FALLING_EDGE, RISING_EDGE };
virtual ~Session() { }
/**
* Configure direction of the GPIO pin
*
* \param d direction of the pin
*/
virtual void direction(Direction d) = 0;
/**
* Write the logic level of the GPIO pin
*
* \param enable logic level on the pin
*/
virtual void write(bool enable) = 0;
/**
* Read the logic level on a specified GPIO pin
*
* \return level on specified GPIO pin
*/
virtual bool read() = 0;
/**
* Set the debouncing time
*
* \param us debouncing time in microseconds, zero means no debouncing
*/
virtual void debouncing(unsigned int us) = 0;
/**
* Rquest IRQ session
*
* \param type type of IRQ
*/
virtual Genode::Irq_session_capability irq_session(Irq_type type) = 0;
/*******************
** RPC interface **
*******************/
GENODE_RPC(Rpc_direction, void, direction, Direction);
GENODE_RPC(Rpc_write, void, write, bool);
GENODE_RPC(Rpc_read, bool, read);
GENODE_RPC(Rpc_debouncing, void, debouncing, unsigned int);
GENODE_RPC(Rpc_irq_session, Genode::Irq_session_capability,
irq_session, Irq_type);
GENODE_RPC_INTERFACE(Rpc_direction, Rpc_write, Rpc_read,
Rpc_debouncing, Rpc_irq_session);
};
#endif /* _INCLUDE__GPIO_SESSION__GPIO_SESSION_H_ */