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/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include <AK/String.h>
#include <AK/Types.h>
#include <Kernel/Devices/BlockDevice.h>
#include <LibBareMetal/Memory/PhysicalAddress.h>
namespace Kernel {
class BXVGADevice final : public BlockDevice {
AK_MAKE_ETERNAL
public:
static BXVGADevice& the();
BXVGADevice();
virtual int ioctl(FileDescription&, unsigned request, unsigned arg) override;
virtual KResultOr<Region*> mmap(Process&, FileDescription&, VirtualAddress preferred_vaddr, size_t offset, size_t, int prot, bool shared) override;
private:
virtual const char* class_name() const override { return "BXVGA"; }
virtual bool can_read(const FileDescription&) const override { return true; }
virtual bool can_write(const FileDescription&) const override { return true; }
virtual ssize_t read(FileDescription&, u8*, ssize_t) override { return -EINVAL; }
virtual ssize_t write(FileDescription&, const u8*, ssize_t) override { return -EINVAL; }
virtual bool read_blocks(unsigned, u16, u8*) override { return false; }
virtual bool write_blocks(unsigned, u16, const u8*) override { return false; }
void set_safe_resolution();
void set_register(u16 index, u16 value);
u16 get_register(u16 index);
bool validate_setup_resolution(int width, int height);
u32 find_framebuffer_address();
void revert_resolution();
bool test_resolution(int width, int height);
size_t framebuffer_size_in_bytes() const { return m_framebuffer_pitch * m_framebuffer_height * 2; }
bool set_resolution(int width, int height);
void set_resolution_registers(int width, int height);
void set_y_offset(int);
PhysicalAddress m_framebuffer_address;
int m_framebuffer_pitch { 0 };
int m_framebuffer_width { 0 };
int m_framebuffer_height { 0 };
int m_y_offset { 0 };
};
}
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