mirror of
https://github.com/LadybirdBrowser/ladybird.git
synced 2024-11-29 19:10:26 +00:00
18e77aa285
This method will be used later in DevFS, to set the appropriate permissions for each device node.
81 lines
2.9 KiB
C++
81 lines
2.9 KiB
C++
/*
|
|
* 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 <Kernel/Devices/CharacterDevice.h>
|
|
#include <Kernel/Interrupts/IRQHandler.h>
|
|
#include <Kernel/PhysicalAddress.h>
|
|
#include <Kernel/VM/PhysicalPage.h>
|
|
#include <Kernel/WaitQueue.h>
|
|
|
|
namespace Kernel {
|
|
|
|
class SB16;
|
|
|
|
class SB16 final : public IRQHandler
|
|
, public CharacterDevice {
|
|
public:
|
|
SB16();
|
|
virtual ~SB16() override;
|
|
|
|
static void create();
|
|
static SB16& the();
|
|
|
|
// ^CharacterDevice
|
|
virtual bool can_read(const FileDescription&, size_t) const override;
|
|
virtual KResultOr<size_t> read(FileDescription&, size_t, UserOrKernelBuffer&, size_t) override;
|
|
virtual KResultOr<size_t> write(FileDescription&, size_t, const UserOrKernelBuffer&, size_t) override;
|
|
virtual bool can_write(const FileDescription&, size_t) const override { return true; }
|
|
|
|
virtual const char* purpose() const override { return class_name(); }
|
|
|
|
// ^Device
|
|
virtual mode_t required_mode() const override { return 0220; }
|
|
|
|
private:
|
|
// ^IRQHandler
|
|
virtual void handle_irq(const RegisterState&) override;
|
|
|
|
// ^CharacterDevice
|
|
virtual const char* class_name() const override { return "SB16"; }
|
|
|
|
void initialize();
|
|
void wait_for_irq();
|
|
void dma_start(uint32_t length);
|
|
void set_sample_rate(uint16_t hz);
|
|
void dsp_write(u8 value);
|
|
u8 dsp_read();
|
|
u8 get_irq_line();
|
|
void set_irq_register(u8 irq_number);
|
|
void set_irq_line(u8 irq_number);
|
|
|
|
OwnPtr<Region> m_dma_region;
|
|
int m_major_version { 0 };
|
|
|
|
WaitQueue m_irq_queue;
|
|
};
|
|
}
|