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7a86a8df90
This removes Pipes dependency on the UHCIController by introducing a controller base class. This will be used to implement other controllers such as OHCI. Additionally, there can be multiple instances of a UHCI controller. For example, multiple UHCI instances can be required for systems with EHCI controllers. EHCI relies on using multiple of either UHCI or OHCI controllers to drive USB 1.x devices. This means UHCIController can no longer be a singleton. Multiple instances of it can now be created and passed to the device and then to the pipe. To handle finding and creating these instances, USBManagement has been introduced. It has the same pattern as the other management classes such as NetworkManagement.
82 lines
2.6 KiB
C++
82 lines
2.6 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/Types.h>
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#include <Kernel/Bus/USB/USBDescriptors.h>
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#include <Kernel/Memory/Region.h>
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namespace Kernel::USB {
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class USBController;
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//
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// A pipe is the logical connection between a memory buffer on the PC (host) and
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// an endpoint on the device. In this implementation, the data buffer the pipe connects
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// to is the physical buffer created when a Transfer is allocated.
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//
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class Pipe {
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public:
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enum class Type : u8 {
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Control = 0,
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Isochronous = 1,
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Bulk = 2,
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Interrupt = 3
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};
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enum class Direction : u8 {
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Out = 0,
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In = 1,
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Bidirectional = 2
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};
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enum class DeviceSpeed : u8 {
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LowSpeed,
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FullSpeed
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};
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public:
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static KResultOr<NonnullOwnPtr<Pipe>> try_create_pipe(USBController const& controller, Type type, Direction direction, u8 endpoint_address, u16 max_packet_size, i8 device_address, u8 poll_interval = 0);
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Type type() const { return m_type; }
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Direction direction() const { return m_direction; }
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DeviceSpeed device_speed() const { return m_speed; }
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i8 device_address() const { return m_device_address; }
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u8 endpoint_address() const { return m_endpoint_address; }
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u16 max_packet_size() const { return m_max_packet_size; }
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u8 poll_interval() const { return m_poll_interval; }
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bool data_toggle() const { return m_data_toggle; }
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void set_max_packet_size(u16 max_size) { m_max_packet_size = max_size; }
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void set_toggle(bool toggle) { m_data_toggle = toggle; }
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void set_device_address(i8 addr) { m_device_address = addr; }
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KResultOr<size_t> control_transfer(u8 request_type, u8 request, u16 value, u16 index, u16 length, void* data);
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Pipe(USBController const& controller, Type type, Direction direction, u16 max_packet_size);
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Pipe(USBController const& controller, Type type, Direction direction, USBEndpointDescriptor& endpoint);
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Pipe(USBController const& controller, Type type, Direction direction, u8 endpoint_address, u16 max_packet_size, u8 poll_interval, i8 device_address);
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private:
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friend class Device;
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NonnullRefPtr<USBController> m_controller;
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Type m_type;
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Direction m_direction;
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DeviceSpeed m_speed;
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i8 m_device_address { 0 }; // Device address of this pipe
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u8 m_endpoint_address { 0 }; // Corresponding endpoint address for this pipe
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u16 m_max_packet_size { 0 }; // Max packet size for this pipe
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u8 m_poll_interval { 0 }; // Polling interval (in frames)
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bool m_data_toggle { false }; // Data toggle for stuffing bit
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};
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}
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