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06f1edb516
These are the actual structures that allow USB to work (i.e the ones actually defined in the specification). This should provide us enough of a baseline implementation that we can build on to support different types of USB device.
51 lines
1.8 KiB
C++
51 lines
1.8 KiB
C++
/*
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* Copyright (c) 2021, Jesse Buhagiar <jooster669@gmail.com>
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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/OwnPtr.h>
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#include <AK/RefPtr.h>
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#include <Kernel/Devices/USB/PacketTypes.h>
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#include <Kernel/Devices/USB/USBPipe.h>
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#include <Kernel/VM/ContiguousVMObject.h>
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#include <Kernel/VM/PhysicalPage.h>
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#include <Kernel/VM/Region.h>
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// TODO: Callback stuff in this class please!
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namespace Kernel::USB {
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class Transfer : public RefCounted<Transfer> {
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public:
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static RefPtr<Transfer> try_create(Pipe& pipe, u16 len);
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public:
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Transfer() = delete;
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Transfer(Pipe& pipe, u16 len, ContiguousVMObject&);
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~Transfer();
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void set_setup_packet(const USBRequestData& request);
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void set_complete() { m_complete = true; }
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void set_error_occurred() { m_error_occurred = true; }
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// `const` here makes sure we don't blow up by writing to a physical address
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const USBRequestData& request() const { return m_request; }
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const Pipe& pipe() const { return m_pipe; }
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Pipe& pipe() { return m_pipe; }
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VirtualAddress buffer() const { return m_data_buffer->vaddr(); }
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PhysicalAddress buffer_physical() const { return m_data_buffer->physical_page(0)->paddr(); }
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u16 transfer_data_size() const { return m_transfer_data_size; }
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bool complete() const { return m_complete; }
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bool error_occurred() const { return m_error_occurred; }
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private:
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Pipe& m_pipe; // Pipe that initiated this transfer
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USBRequestData m_request; // USB request
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OwnPtr<Region> m_data_buffer; // DMA Data buffer for transaction
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u16 m_transfer_data_size { 0 }; // Size of the transfer's data stage
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bool m_complete { false }; // Has this transfer been completed?
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bool m_error_occurred { false }; // Did an error occur during this transfer?
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};
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}
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