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126 lines
2.7 KiB
C++
126 lines
2.7 KiB
C++
/*
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* \brief GPIO driver interface
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* \author Stefan Kalkowski
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* \date 2013-05-03
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*/
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/*
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* Copyright (C) 2011-2017 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__DRIVER_H_
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#define _INCLUDE__GPIO__DRIVER_H_
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/* Genode includes */
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#include <base/signal.h>
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namespace Gpio { struct Driver; }
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struct Gpio::Driver
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{
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/**
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* Set direction of GPIO pin, whether it's an input or output one
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*
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*\param gpio corresponding gpio pin number
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*/
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virtual void direction(unsigned gpio, bool input) = 0;
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/**
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* Set output level (high or low)
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*
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*\param gpio corresponding gpio pin number
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*/
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virtual void write(unsigned gpio, bool enable) = 0;
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/**
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* Read input level (high or low)
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*
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*\param gpio corresponding gpio pin number
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*/
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virtual bool read(unsigned gpio) = 0;
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/**
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* Enable/disable debounce logic for the GPIO pin
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*
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*\param gpio corresponding gpio pin number
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*/
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virtual void debounce_enable(unsigned gpio, bool enable) = 0;
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/**
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* Set delay for debounce logic for the GPIO pin
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*
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*\param gpio corresponding gpio pin number
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*/
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virtual void debounce_time(unsigned gpio, unsigned long us) = 0;
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/**
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* Set IRQ trigger state to falling edge-triggered
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*
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*\param gpio corresponding gpio pin number
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*/
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virtual void falling_detect(unsigned gpio) = 0;
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/**
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* Set IRQ trigger state to rising edge-triggered
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*
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*\param gpio corresponding gpio pin number
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*/
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virtual void rising_detect(unsigned gpio) = 0;
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/**
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* Set IRQ trigger state to high level-triggered
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*
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*\param gpio corresponding gpio pin number
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*/
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virtual void high_detect(unsigned gpio) = 0;
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/**
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* Set IRQ trigger state to low level-triggered
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*
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*\param gpio corresponding gpio pin number
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*/
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virtual void low_detect(unsigned gpio) = 0;
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/**
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* Enable/disable IRQ for specified GPIO pin
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*
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*\param gpio corresponding gpio pin number
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*/
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virtual void irq_enable(unsigned gpio, bool enable) = 0;
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/**
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* Acknowledge IRQ for specified GPIO pin
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*
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* \param gpio corresponding gpio pin number
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*/
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virtual void ack_irq(unsigned gpio) = 0;
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/**
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* Register signal handler for interrupts
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*
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*\param gpio corresponding gpio pin number
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*/
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virtual void register_signal(unsigned gpio,
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Genode::Signal_context_capability cap) = 0;
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/**
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* Unregister signal handler
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*
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*\param gpio corresponding gpio pin number
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*/
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virtual void unregister_signal(unsigned gpio) = 0;
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/**
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* Check whether GPIO number is valid
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*
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*\param gpio corresponding gpio pin number
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*/
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virtual bool gpio_valid(unsigned gpio) = 0;
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};
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#endif /* _INCLUDE__GPIO__DRIVER_H_ */
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