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/*
* Copyright (c) 2021, Jesse Buhagiar <jooster669@gmail.com>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/OwnPtr.h>
#include <AK/Types.h>
#include <Kernel/Bus/USB/USBDescriptors.h>
#include <Kernel/Memory/Region.h>
namespace Kernel::USB {
class USBController;
//
// A pipe is the logical connection between a memory buffer on the PC (host) and
// an endpoint on the device. In this implementation, the data buffer the pipe connects
// to is the physical buffer created when a Transfer is allocated.
//
class Pipe {
public:
enum class Type : u8 {
Control = 0,
Isochronous = 1,
Bulk = 2,
Interrupt = 3
};
enum class Direction : u8 {
Out = 0,
In = 1,
Bidirectional = 2
};
enum class DeviceSpeed : u8 {
LowSpeed,
FullSpeed
};
public:
static ErrorOr<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);
Type type() const { return m_type; }
Direction direction() const { return m_direction; }
DeviceSpeed device_speed() const { return m_speed; }
i8 device_address() const { return m_device_address; }
u8 endpoint_address() const { return m_endpoint_address; }
u16 max_packet_size() const { return m_max_packet_size; }
u8 poll_interval() const { return m_poll_interval; }
bool data_toggle() const { return m_data_toggle; }
void set_max_packet_size(u16 max_size) { m_max_packet_size = max_size; }
void set_toggle(bool toggle) { m_data_toggle = toggle; }
void set_device_address(i8 addr) { m_device_address = addr; }
ErrorOr<size_t> control_transfer(u8 request_type, u8 request, u16 value, u16 index, u16 length, void* data);
Pipe(USBController const& controller, Type type, Direction direction, u16 max_packet_size);
Pipe(USBController const& controller, Type type, Direction direction, USBEndpointDescriptor& endpoint);
Pipe(USBController const& controller, Type type, Direction direction, u8 endpoint_address, u16 max_packet_size, u8 poll_interval, i8 device_address);
private:
friend class Device;
NonnullRefPtr<USBController> m_controller;
Type m_type;
Direction m_direction;
DeviceSpeed m_speed;
i8 m_device_address { 0 }; // Device address of this pipe
u8 m_endpoint_address { 0 }; // Corresponding endpoint address for this pipe
u16 m_max_packet_size { 0 }; // Max packet size for this pipe
u8 m_poll_interval { 0 }; // Polling interval (in frames)
bool m_data_toggle { false }; // Data toggle for stuffing bit
};
}
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