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https://github.com/RGBCube/serenity
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4abf399a74
The number of UHCI related files is starting to expand to the point where it's best if we move this into their own subdirectory. It'll also make it easier to manage when we decide to add some more controller types (whenever that may be)
87 lines
2.8 KiB
C++
87 lines
2.8 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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#include <Kernel/Bus/USB/PacketTypes.h>
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#include <Kernel/Bus/USB/UHCI/UHCIController.h>
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#include <Kernel/Bus/USB/USBPipe.h>
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#include <Kernel/Bus/USB/USBTransfer.h>
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namespace Kernel::USB {
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KResultOr<NonnullOwnPtr<Pipe>> Pipe::try_create_pipe(USBController const& controller, Type type, Direction direction, u8 endpoint_address, u16 max_packet_size, i8 device_address, u8 poll_interval)
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{
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auto pipe = adopt_own_if_nonnull(new (nothrow) Pipe(controller, type, direction, endpoint_address, max_packet_size, poll_interval, device_address));
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if (!pipe)
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return ENOMEM;
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return pipe.release_nonnull();
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}
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Pipe::Pipe(USBController const& controller, Type type, Pipe::Direction direction, u16 max_packet_size)
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: m_controller(controller)
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, m_type(type)
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, m_direction(direction)
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, m_endpoint_address(0)
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, m_max_packet_size(max_packet_size)
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, m_poll_interval(0)
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, m_data_toggle(false)
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{
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}
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Pipe::Pipe(USBController const& controller, Type type, Direction direction, USBEndpointDescriptor& endpoint [[maybe_unused]])
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: m_controller(controller)
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, m_type(type)
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, m_direction(direction)
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{
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// TODO: decode endpoint structure
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}
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Pipe::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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: m_controller(controller)
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, m_type(type)
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, m_direction(direction)
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, m_device_address(device_address)
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, m_endpoint_address(endpoint_address)
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, m_max_packet_size(max_packet_size)
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, m_poll_interval(poll_interval)
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, m_data_toggle(false)
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{
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}
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KResultOr<size_t> Pipe::control_transfer(u8 request_type, u8 request, u16 value, u16 index, u16 length, void* data)
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{
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USBRequestData usb_request;
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usb_request.request_type = request_type;
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usb_request.request = request;
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usb_request.value = value;
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usb_request.index = index;
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usb_request.length = length;
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auto transfer = Transfer::try_create(*this, length);
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if (!transfer)
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return ENOMEM;
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transfer->set_setup_packet(usb_request);
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dbgln_if(USB_DEBUG, "Pipe: Transfer allocated @ {}", transfer->buffer_physical());
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auto transfer_len_or_error = m_controller->submit_control_transfer(*transfer);
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if (transfer_len_or_error.is_error())
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return transfer_len_or_error.error();
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auto transfer_length = transfer_len_or_error.release_value();
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// TODO: Check transfer for completion and copy data from transfer buffer into data
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if (length > 0)
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memcpy(reinterpret_cast<u8*>(data), transfer->buffer().as_ptr() + sizeof(USBRequestData), length);
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dbgln_if(USB_DEBUG, "Pipe: Control Transfer complete!");
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return transfer_length;
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}
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}
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