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7126a42d4d
Instead of waking up to check for IRQ's regularly, use a WaitQueue and wake it up in the IRQ handler.
44 lines
1.1 KiB
C++
44 lines
1.1 KiB
C++
#pragma once
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#include <AK/CircularQueue.h>
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#include <Kernel/Devices/CharacterDevice.h>
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#include <Kernel/IRQHandler.h>
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#include <Kernel/VM/PhysicalAddress.h>
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#include <Kernel/VM/PhysicalPage.h>
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#include <Kernel/WaitQueue.h>
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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 SB16& the();
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// ^CharacterDevice
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virtual bool can_read(const FileDescription&) const override;
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virtual ssize_t read(FileDescription&, u8*, ssize_t) override;
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virtual ssize_t write(FileDescription&, const u8*, ssize_t) override;
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virtual bool can_write(const FileDescription&) const override { return true; }
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private:
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// ^IRQHandler
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virtual void handle_irq() 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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u8 dsp_read();
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RefPtr<PhysicalPage> m_dma_buffer_page;
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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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