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79fa9765ca
We now use AK::Error and AK::ErrorOr<T> in both kernel and userspace! This was a slightly tedious refactoring that took a long time, so it's not unlikely that some bugs crept in. Nevertheless, it does pass basic functionality testing, and it's just real nice to finally see the same pattern in all contexts. :^)
74 lines
2.5 KiB
C++
74 lines
2.5 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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ErrorOr<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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return adopt_nonnull_own_or_enomem(new (nothrow) Pipe(controller, type, direction, endpoint_address, max_packet_size, poll_interval, device_address));
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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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ErrorOr<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 = TRY(Transfer::try_create(*this, length));
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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_length = TRY(m_controller->submit_control_transfer(*transfer));
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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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