17c79a9e23
Besides adapting the components to the use of base/log.h, the patch cleans up a few base headers, i.e., it removes unused includes from root/component.h, specifically base/heap.h and ram_session/ram_session.h. Hence, components that relied on the implicit inclusion of those headers have to manually include those headers now. While adjusting the log messages, I repeatedly stumbled over the problem that printing char * arguments is ambiguous. It is unclear whether to print the argument as pointer or null-terminated string. To overcome this problem, the patch introduces a new type 'Cstring' that allows the caller to express that the argument should be handled as null-terminated string. As a nice side effect, with this type in place, the optional len argument of the 'String' class could be removed. Instead of supplying a pair of (char const *, size_t), the constructor accepts a 'Cstring'. This, in turn, clears the way let the 'String' constructor use the new output mechanism to assemble a string from multiple arguments (and thereby getting rid of snprintf within Genode in the near future). To enforce the explicit resolution of the char * ambiguity, the 'char *' overload of the 'print' function is marked as deleted. Issue #1987
144 lines
3.6 KiB
C++
144 lines
3.6 KiB
C++
/*
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* \brief OMAP4-specific implementation of the Block::Driver interface
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* \author Norman Feske
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* \date 2012-07-19
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*/
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/*
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* Copyright (C) 2012-2015 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 _DRIVERS__SD_CARD__SPEC__OMAP4__DRIVER_H_
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#define _DRIVERS__SD_CARD__SPEC__OMAP4__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/log.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 <mmchs.h>
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namespace Block {
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using namespace Genode;
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class Omap4_driver;
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}
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class Block::Omap4_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) { Timer::Connection::usleep(us); }
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} _delayer;
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/* memory map */
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enum {
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MMCHS1_MMIO_BASE = 0x4809c000,
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MMCHS1_MMIO_SIZE = 0x00001000,
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};
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/* display sub system registers */
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Attached_io_mem_dataspace _mmchs1_mmio;
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/* hsmmc controller instance */
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Omap4_hsmmc_controller _controller;
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bool const _use_dma;
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public:
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Omap4_driver(bool use_dma)
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:
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_mmchs1_mmio(MMCHS1_MMIO_BASE, MMCHS1_MMIO_SIZE),
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_controller((addr_t)_mmchs1_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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Genode::log("SD card detected");
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Genode::log("capacity: ", card_info.capacity_mb(), " MiB");
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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(Block::sector_t block_number,
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Genode::size_t block_count,
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char *out_buffer,
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Packet_descriptor &packet)
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{
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if (!_controller.read_blocks(block_number, block_count, out_buffer))
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throw Io_error();
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ack_packet(packet);
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}
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void write(Block::sector_t block_number,
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Genode::size_t block_count,
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char const *buffer,
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Packet_descriptor &packet)
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{
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if (!_controller.write_blocks(block_number, block_count, buffer))
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throw Io_error();
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ack_packet(packet);
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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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Genode::Ram_dataspace_capability alloc_dma_buffer(Genode::size_t size) {
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return Genode::env()->ram_session()->alloc(size, UNCACHED); }
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void free_dma_buffer(Genode::Ram_dataspace_capability c) {
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return Genode::env()->ram_session()->free(c); }
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};
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#endif /* _DRIVERS__SD_CARD__SPEC__OMAP4__DRIVER_H_ */
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