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ca971bbfd8
This patch changes the top-level directory layout as a preparatory step for improving the tools for managing 3rd-party source codes. The rationale is described in the issue referenced below. Issue #1082
129 lines
2.9 KiB
C++
129 lines
2.9 KiB
C++
/*
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* \brief GPIO-session component
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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) 2011-2013 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 General Public License version 2.
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*/
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#ifndef _INCLUDE__GPIO__COMPONENT_H_
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#define _INCLUDE__GPIO__COMPONENT_H_
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#include <base/printf.h>
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#include <root/component.h>
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#include <gpio_session/gpio_session.h>
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#include <gpio/driver.h>
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namespace Gpio {
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class Session_component;
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class Root;
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};
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class Gpio::Session_component : public Genode::Rpc_object<Gpio::Session>
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{
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private:
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Driver &_driver;
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unsigned long _pin;
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Genode::Signal_context_capability _sigh;
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public:
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Session_component(Driver &driver, unsigned long gpio_pin)
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: _driver(driver), _pin(gpio_pin) { }
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~Session_component()
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{
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if (_sigh.valid())
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_driver.unregister_signal(_pin);
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}
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/************************************
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** Gpio::Session interface **
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************************************/
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void direction(Direction d) { _driver.direction(_pin, (d == IN)); }
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void write(bool level) { _driver.write(_pin, level); }
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bool read() { return _driver.read(_pin); }
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void irq_enable(bool enable) { _driver.irq_enable(_pin, enable); }
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void irq_sigh(Genode::Signal_context_capability cap)
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{
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if (cap.valid()) {
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_sigh = cap;
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_driver.register_signal(_pin, cap);
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}
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}
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void irq_type(Irq_type type)
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{
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switch (type) {
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case HIGH_LEVEL:
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_driver.high_detect(_pin);
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break;
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case LOW_LEVEL:
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_driver.low_detect(_pin);
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break;
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case RISING_EDGE:
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_driver.rising_detect(_pin);
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break;
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case FALLING_EDGE:
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_driver.falling_detect(_pin);
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};
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}
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void debouncing(unsigned int us)
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{
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if (us) {
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_driver.debounce_time(_pin, us);
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_driver.debounce_enable(_pin, true);
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} else
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_driver.debounce_enable(_pin, false);
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}
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};
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class Gpio::Root : public Genode::Root_component<Gpio::Session_component>
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{
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private:
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Driver &_driver;
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protected:
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Session_component *_create_session(const char *args)
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{
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unsigned long pin =
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Genode::Arg_string::find_arg(args, "gpio").ulong_value(0);
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Genode::size_t ram_quota =
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Genode::Arg_string::find_arg(args, "ram_quota").ulong_value(0);
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if (!_driver.gpio_valid(pin))
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throw Invalid_args();
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if (ram_quota < sizeof(Session_component)) {
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PWRN("Insufficient dontated ram_quota (%zd bytes), require %zd bytes",
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ram_quota, sizeof(Session_component));
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throw Genode::Root::Quota_exceeded();
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}
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return new (md_alloc()) Session_component(_driver, pin);
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}
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public:
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Root(Genode::Rpc_entrypoint *session_ep,
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Genode::Allocator *md_alloc, Driver &driver)
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: Genode::Root_component<Gpio::Session_component>(session_ep, md_alloc),
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_driver(driver) { }
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};
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#endif /* _INCLUDE__GPIO__COMPONENT_H_ */
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