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94 lines
2.2 KiB
C++
94 lines
2.2 KiB
C++
/*
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* \brief Gpio session interface
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* \author Ivan Loskutov <ivan.loskutov@ksyslabs.org>
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* \author Stefan Kalkowski <stefan.kalkowski@genode-labs.com>
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* \date 2012-06-23
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*/
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/*
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* Copyright (C) 2012 Ksys Labs LLC
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* Copyright (C) 2012-2017 Genode Labs GmbH
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*
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* This file is part of the Genode OS framework, which is distributed
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* under the terms of the GNU Affero General Public License version 3.
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*/
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#ifndef _INCLUDE__GPIO_SESSION__GPIO_SESSION_H_
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#define _INCLUDE__GPIO_SESSION__GPIO_SESSION_H_
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#include <base/signal.h>
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#include <dataspace/capability.h>
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#include <session/session.h>
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#include <irq_session/capability.h>
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namespace Gpio { struct Session; }
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struct Gpio::Session : Genode::Session
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{
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/**
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* \noapi
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*/
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static const char *service_name() { return "Gpio"; }
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static constexpr unsigned CAP_QUOTA = 2;
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enum Direction { IN, OUT };
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enum Irq_type { LOW_LEVEL, HIGH_LEVEL, FALLING_EDGE, RISING_EDGE };
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virtual ~Session() { }
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/**
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* Configure direction of the GPIO pin
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*
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* \param d direction of the pin
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*/
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virtual void direction(Direction d) = 0;
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/**
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* Write the logic level of the GPIO pin
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*
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* \param enable logic level on the pin
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*/
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virtual void write(bool enable) = 0;
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/**
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* Read the logic level on a specified GPIO pin
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*
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* \return level on specified GPIO pin
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*/
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virtual bool read() = 0;
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/**
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* Set the debouncing time
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*
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* \param us debouncing time in microseconds, zero means no debouncing
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*/
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virtual void debouncing(unsigned int us) = 0;
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/**
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* Rquest IRQ session
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*
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* \param type type of IRQ
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*/
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virtual Genode::Irq_session_capability irq_session(Irq_type type) = 0;
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/*******************
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** RPC interface **
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*******************/
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GENODE_RPC(Rpc_direction, void, direction, Direction);
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GENODE_RPC(Rpc_write, void, write, bool);
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GENODE_RPC(Rpc_read, bool, read);
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GENODE_RPC(Rpc_debouncing, void, debouncing, unsigned int);
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GENODE_RPC(Rpc_irq_session, Genode::Irq_session_capability,
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irq_session, Irq_type);
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GENODE_RPC_INTERFACE(Rpc_direction, Rpc_write, Rpc_read,
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Rpc_debouncing, Rpc_irq_session);
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};
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#endif /* _INCLUDE__GPIO_SESSION__GPIO_SESSION_H_ */
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