128 lines
2.7 KiB
C++
128 lines
2.7 KiB
C++
/*
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* \brief Exynos5-specific implementation of the Block::Driver interface
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* \author Sebastian Sumpf
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* \date 2013-03-22
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*/
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/*
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* Copyright (C) 2015 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 _DRIVER_H_
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#define _DRIVER_H_
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#include <util/mmio.h>
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#include <os/attached_io_mem_dataspace.h>
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#include <base/printf.h>
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#include <timer_session/connection.h>
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#include <block/component.h>
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#include <os/server.h>
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/* local includes */
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#include <dwmmc.h>
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namespace Block {
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using namespace Genode;
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class Exynos5_driver;
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}
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class Block::Exynos5_driver : public Block::Driver
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{
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private:
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struct Timer_delayer : Timer::Connection, Mmio::Delayer
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{
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/**
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* Implementation of 'Delayer' interface
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*/
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void usleep(unsigned us)
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{
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/* polling */
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if (us == 0)
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return;
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Timer::Connection::usleep(us);
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}
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} _delayer;
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enum {
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MSH_BASE = 0x12200000, /* host controller base for eMMC */
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MSH_SIZE = 0x10000,
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};
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Server::Entrypoint &_ep;
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/* display sub system registers */
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Attached_io_mem_dataspace _mmio;
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/* mobile storage host controller instance */
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Exynos5_msh_controller _controller;
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bool const _use_dma;
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public:
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Exynos5_driver(Server::Entrypoint &ep, bool use_dma)
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:
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_ep(ep),
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_mmio(MSH_BASE, MSH_SIZE),
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_controller(ep, (addr_t)_mmio.local_addr<void>(),
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_delayer, use_dma),
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_use_dma(use_dma)
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{
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Sd_card::Card_info const card_info = _controller.card_info();
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PLOG("SD/MMC card detected");
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PLOG("capacity: %zd MiB", card_info.capacity_mb());
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}
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/*****************************
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** Block::Driver interface **
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*****************************/
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Genode::size_t block_size() { return 512; }
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virtual Block::sector_t block_count()
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{
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return _controller.card_info().capacity_mb() * 1024 * 2;
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}
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Block::Session::Operations ops()
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{
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Block::Session::Operations o;
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o.set_operation(Block::Packet_descriptor::READ);
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o.set_operation(Block::Packet_descriptor::WRITE);
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return o;
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}
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void read_dma(Block::sector_t block_number,
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Genode::size_t block_count,
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Genode::addr_t phys,
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Packet_descriptor &packet)
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{
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if (!_controller.read_blocks_dma(block_number, block_count, phys))
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throw Io_error();
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ack_packet(packet);
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}
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void write_dma(Block::sector_t block_number,
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Genode::size_t block_count,
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Genode::addr_t phys,
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Packet_descriptor &packet)
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{
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if (!_controller.write_blocks_dma(block_number, block_count, phys))
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throw Io_error();
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ack_packet(packet);
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}
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bool dma_enabled() { return _use_dma; }
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};
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#endif /* _DRIVER_H_ */
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