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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
3 changed files with 18 additions and 15 deletions
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24
Kernel/Bus/USB/USBRequest.h
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@ -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