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Kernel/USB: Add all USB 2.0 bmRequestType fields

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Luke 2021-08-10 03:10:54 +01:00 • committed by Andreas Kling
parent 5578a5a32d
commit 3b4f71e4df
Notes: sideshowbarker 2024-07-18 06:53:07 +09:00
3 changed files with 18 additions and 15 deletions
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2
Kernel/Bus/USB/UHCIController.cpp
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@ -579,7 +579,7 @@ void UHCIController::free_descriptor_chain(TransferDescriptor* first_descriptor)
KResultOr<size_t> UHCIController::submit_control_transfer(Transfer& transfer)
{
Pipe& pipe = transfer.pipe(); // Short circuit the pipe related to this transfer
bool direction_in = (transfer.request().request_type & USB_DEVICE_REQUEST_DEVICE_TO_HOST) == USB_DEVICE_REQUEST_DEVICE_TO_HOST;
bool direction_in = (transfer.request().request_type & USB_REQUEST_TRANSFER_DIRECTION_DEVICE_TO_HOST) == USB_REQUEST_TRANSFER_DIRECTION_DEVICE_TO_HOST;
TransferDescriptor* setup_td = create_transfer_descriptor(pipe, PacketID::SETUP, sizeof(USBRequestData));
if (!setup_td)

7
Kernel/Bus/USB/USBDevice.cpp
View file

@ -46,9 +46,8 @@ KResult Device::enumerate()
{
USBDeviceDescriptor dev_descriptor {};
// FIXME: 0x100 is a magic number for now, as I'm not quite sure how these are constructed....
// Send 8-bytes to get at least the `max_packet_size` from the device
auto transfer_length_or_error = m_default_pipe->control_transfer(USB_DEVICE_REQUEST_DEVICE_TO_HOST, USB_REQUEST_GET_DESCRIPTOR, 0x100, 0, 8, &dev_descriptor);
auto transfer_length_or_error = m_default_pipe->control_transfer(USB_REQUEST_TRANSFER_DIRECTION_DEVICE_TO_HOST, USB_REQUEST_GET_DESCRIPTOR, (DESCRIPTOR_TYPE_DEVICE << 8), 0, 8, &dev_descriptor);
if (transfer_length_or_error.is_error())
return transfer_length_or_error.error();
@ -62,7 +61,7 @@ KResult Device::enumerate()
VERIFY(dev_descriptor.descriptor_header.descriptor_type == DESCRIPTOR_TYPE_DEVICE);
m_default_pipe->set_max_packet_size(dev_descriptor.max_packet_size);
transfer_length_or_error = m_default_pipe->control_transfer(USB_DEVICE_REQUEST_DEVICE_TO_HOST, USB_REQUEST_GET_DESCRIPTOR, 0x100, 0, sizeof(USBDeviceDescriptor), &dev_descriptor);
transfer_length_or_error = m_default_pipe->control_transfer(USB_REQUEST_TRANSFER_DIRECTION_DEVICE_TO_HOST, USB_REQUEST_GET_DESCRIPTOR, (DESCRIPTOR_TYPE_DEVICE << 8), 0, sizeof(USBDeviceDescriptor), &dev_descriptor);
if (transfer_length_or_error.is_error())
return transfer_length_or_error.error();
@ -87,7 +86,7 @@ KResult Device::enumerate()
m_address = m_controller->allocate_address();
// Attempt to set devices address on the bus
transfer_length_or_error = m_default_pipe->control_transfer(USB_DEVICE_REQUEST_HOST_TO_DEVICE, USB_REQUEST_SET_ADDRESS, m_address, 0, 0, nullptr);
transfer_length_or_error = m_default_pipe->control_transfer(USB_REQUEST_TRANSFER_DIRECTION_HOST_TO_DEVICE, USB_REQUEST_SET_ADDRESS, m_address, 0, 0, nullptr);
if (transfer_length_or_error.is_error())
return transfer_length_or_error.error();

24
Kernel/Bus/USB/USBRequest.h
View file

@ -1,5 +1,6 @@
/*
* Copyright (c) 2021, Jesse Buhagiar <jooster669@gmail.com>
* Copyright (c) 2021, Luke Wilde <lukew@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
@ -9,18 +10,21 @@
#include <AK/Types.h>
//
// USB Request directions
// bmRequestType fields
//
// As per Section 9.4 of the USB Specification, it is noted that Requeset Types that
// Device to Host have bit 7 of `bmRequestType` set. These are here as a convenience,
// as we construct the request at the call-site to make reading transfers easier.
// As per Section 9.3 of the USB 2.0 Specification.
// Note that while some of these values are zero, there are here for convenience.
// This is because it makes reading the request type easier to read when constructing a USB request.
//
static constexpr u8 USB_DEVICE_REQUEST_DEVICE_TO_HOST = 0x80;
static constexpr u8 USB_DEVICE_REQUEST_HOST_TO_DEVICE = 0x00;
static constexpr u8 USB_INTERFACE_REQUEST_DEVICE_TO_HOST = 0x81;
static constexpr u8 USB_INTERFACE_REQUEST_HOST_TO_DEVICE = 0x01;
static constexpr u8 USB_ENDPOINT_REQUEST_DEVICE_TO_HOST = 0x82;
static constexpr u8 USB_ENDPOINT_REQUEST_HOST_TO_DEVICE = 0x02;
static constexpr u8 USB_REQUEST_TRANSFER_DIRECTION_DEVICE_TO_HOST = 0x80;
static constexpr u8 USB_REQUEST_TRANSFER_DIRECTION_HOST_TO_DEVICE = 0x00;
static constexpr u8 USB_REQUEST_TYPE_STANDARD = 0x00;
static constexpr u8 USB_REQUEST_TYPE_CLASS = 0x20;
static constexpr u8 USB_REQUEST_TYPE_VENDOR = 0x40;
static constexpr u8 USB_REQUEST_RECIPIENT_DEVICE = 0x00;
static constexpr u8 USB_REQUEST_RECIPIENT_INTERFACE = 0x01;
static constexpr u8 USB_REQUEST_RECIPIENT_ENDPOINT = 0x02;
static constexpr u8 USB_REQUEST_RECIPIENT_OTHER = 0x03;
//
// Standard USB request types