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b91df26d4a
If we are in a shared interrupt handler, the called handlers might indicate it was not their interrupt, so we should not increment the call counter of these handlers.
64 lines
1.7 KiB
C++
64 lines
1.7 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <Kernel/Devices/CharacterDevice.h>
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#include <Kernel/Interrupts/IRQHandler.h>
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#include <Kernel/PhysicalAddress.h>
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#include <Kernel/VM/PhysicalPage.h>
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#include <Kernel/WaitQueue.h>
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namespace Kernel {
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class SB16;
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class SB16 final : public IRQHandler
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, public CharacterDevice {
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public:
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SB16();
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virtual ~SB16() override;
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static void detect();
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static void create();
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static SB16& the();
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// ^CharacterDevice
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virtual bool can_read(const FileDescription&, size_t) const override;
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virtual KResultOr<size_t> read(FileDescription&, u64, UserOrKernelBuffer&, size_t) override;
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virtual KResultOr<size_t> write(FileDescription&, u64, const UserOrKernelBuffer&, size_t) override;
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virtual bool can_write(const FileDescription&, size_t) const override { return true; }
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virtual const char* purpose() const override { return class_name(); }
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// ^Device
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virtual mode_t required_mode() const override { return 0220; }
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virtual String device_name() const override { return "audio"; }
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private:
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// ^IRQHandler
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virtual bool handle_irq(const RegisterState&) override;
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// ^CharacterDevice
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virtual const char* class_name() const override { return "SB16"; }
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void initialize();
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void wait_for_irq();
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void dma_start(uint32_t length);
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void set_sample_rate(uint16_t hz);
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void dsp_write(u8 value);
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static u8 dsp_read();
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u8 get_irq_line();
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void set_irq_register(u8 irq_number);
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void set_irq_line(u8 irq_number);
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OwnPtr<Region> m_dma_region;
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int m_major_version { 0 };
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WaitQueue m_irq_queue;
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};
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}
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