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https://github.com/RGBCube/serenity
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7400eb3640
Add support for async transfers by using a separate kernel task to poll a list of active async transfers on a set time interval, and invoke their user-provided callback function when they are complete. Also add support for the interrupt class of transfers, building off of this async functionality.
42 lines
1.1 KiB
C++
42 lines
1.1 KiB
C++
/*
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* Copyright (c) 2021, Luke Wilde <lukew@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 <AK/AtomicRefCounted.h>
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#include <AK/Error.h>
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#include <Kernel/Bus/USB/USBDevice.h>
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#include <Kernel/Bus/USB/USBTransfer.h>
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namespace Kernel::USB {
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class USBController : public AtomicRefCounted<USBController> {
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public:
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virtual ~USBController() = default;
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virtual ErrorOr<void> initialize() = 0;
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virtual ErrorOr<void> reset() = 0;
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virtual ErrorOr<void> stop() = 0;
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virtual ErrorOr<void> start() = 0;
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virtual void cancel_async_transfer(NonnullLockRefPtr<Transfer> transfer) = 0;
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virtual ErrorOr<size_t> submit_control_transfer(Transfer&) = 0;
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virtual ErrorOr<size_t> submit_bulk_transfer(Transfer& transfer) = 0;
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virtual ErrorOr<void> submit_async_interrupt_transfer(NonnullLockRefPtr<Transfer> transfer, u16 ms_interval) = 0;
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u8 allocate_address();
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private:
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u8 m_next_device_index { 1 };
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IntrusiveListNode<USBController, NonnullLockRefPtr<USBController>> m_controller_list_node;
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public:
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using List = IntrusiveList<&USBController::m_controller_list_node>;
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};
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}
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