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/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/String.h>
#include <AK/Types.h>
#include <Kernel/Devices/BlockDevice.h>
#include <Kernel/PhysicalAddress.h>
namespace Kernel {
class BXVGADevice final : public BlockDevice {
AK_MAKE_ETERNAL
public:
static void initialize();
static BXVGADevice& the();
BXVGADevice();
virtual int ioctl(FileDescription&, unsigned request, FlatPtr arg) override;
virtual KResultOr<Region*> mmap(Process&, FileDescription&, const Range&, u64 offset, int prot, bool shared) override;
// ^Device
virtual mode_t required_mode() const override { return 0660; }
virtual String device_name() const override;
private:
virtual const char* class_name() const override { return "BXVGA"; }
virtual bool can_read(const FileDescription&, size_t) const override { return true; }
virtual bool can_write(const FileDescription&, size_t) const override { return true; }
virtual void start_request(AsyncBlockDeviceRequest& request) override { request.complete(AsyncDeviceRequest::Failure); }
virtual KResultOr<size_t> read(FileDescription&, u64, UserOrKernelBuffer&, size_t) override { return -EINVAL; }
virtual KResultOr<size_t> write(FileDescription&, u64, const UserOrKernelBuffer&, size_t) override { return -EINVAL; }
void set_safe_resolution();
void set_register(u16 index, u16 value);
u16 get_register(u16 index);
bool validate_setup_resolution(size_t width, size_t height);
u32 find_framebuffer_address();
void revert_resolution();
bool test_resolution(size_t width, size_t height);
size_t framebuffer_size_in_bytes() const { return m_framebuffer_pitch * m_framebuffer_height * 2; }
bool set_resolution(size_t width, size_t height);
void set_resolution_registers(size_t width, size_t height);
void set_y_offset(size_t);
PhysicalAddress m_framebuffer_address;
size_t m_framebuffer_pitch { 0 };
size_t m_framebuffer_width { 0 };
size_t m_framebuffer_height { 0 };
size_t m_y_offset { 0 };
};
}
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