99 lines
1.8 KiB
C++
99 lines
1.8 KiB
C++
/*
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* \brief Gpio Driver for Zynq
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* \author Mark Albers
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* \date 2015-04-02
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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 _GPIO_H_
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#define _GPIO_H_
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#include <base/attached_io_mem_dataspace.h>
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#include <util/mmio.h>
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namespace Gpio {
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using namespace Genode;
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class Zynq_Gpio;
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}
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struct Gpio::Zynq_Gpio : Attached_io_mem_dataspace, Mmio
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{
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Zynq_Gpio(Genode::Env &env, Genode::addr_t const mmio_base, Genode::size_t const mmio_size) :
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Genode::Attached_io_mem_dataspace(env, mmio_base, mmio_size),
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Genode::Mmio((Genode::addr_t)local_addr<void>())
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{ }
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~Zynq_Gpio()
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{ }
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/*
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* Registers
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*/
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struct GPIO_DATA : Register<0x00, 32> {};
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struct GPIO_TRI : Register<0x04, 32> {};
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struct GPIO2_DATA : Register<0x08, 32> {};
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struct GPIO2_TRI : Register<0x0C, 32> {};
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struct GIER : Register<0x011C, 32>
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{
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struct Global_Interrupt_Enable : Bitfield<31,1> {};
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};
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struct IP_IER : Register<0x0128, 32>
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{
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struct Channel_1_Interrupt_Enable : Bitfield<0,1> {};
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struct Channel_2_Interrupt_Enable : Bitfield<1,1> {};
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};
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struct IP_ISR : Register<0x120, 32>
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{
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struct Channel_1_Interrupt_Status : Bitfield<0,1> {};
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struct Channel_2_Interrupt_Status : Bitfield<1,1> {};
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};
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/*
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* Functions
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*/
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Genode::uint8_t gpio_read(bool isChannel2)
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{
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if (isChannel2)
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{
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write<GPIO2_TRI>(0xffffffff);
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return read<GPIO2_DATA>();
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}
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else
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{
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write<GPIO_TRI>(0xffffffff);
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return read<GPIO_DATA>();
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}
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}
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bool gpio_write(Genode::uint8_t data, bool isChannel2)
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{
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if (isChannel2)
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{
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write<GPIO2_TRI>(0);
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write<GPIO2_DATA>(data);
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}
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else
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{
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write<GPIO_TRI>(0);
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write<GPIO_DATA>(data);
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}
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return true;
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}
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};
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#endif // _GPIO_H_
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