Difference between revisions of "USB Stack"

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The [[USB]] stack is the component that provides the communication between [[USB]] devices and their respective drivers and applications. It consists of multiple files, each with a distinct function. The [[USB]] stack in [[ReactOS]] is currently limited. This page documents the development of the new [[USB]] stack. Development work on a [[USB]] 3 stack is in progress.
 
The [[USB]] stack is the component that provides the communication between [[USB]] devices and their respective drivers and applications. It consists of multiple files, each with a distinct function. The [[USB]] stack in [[ReactOS]] is currently limited. This page documents the development of the new [[USB]] stack. Development work on a [[USB]] 3 stack is in progress.
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{{Warning|
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With current versions of ReactOS, USB support is '''NOT''' advanced enough to successfully work with complex USB devices such as web-cameras, sound cards and etc. Please mind that system may crash due problem caused by such USB-device. If possible, it is better to avoid using USB devices together with ReactOS,  unless this is the main purpose of your experiment.}}
  
 
'''NOTE: There is a known issue with booting [[ReactOS]] from the internal HDD with a [[USB]] storage device connected which causes ROS to lose the boot device. Until this problem is fixed or a workaround is developed, please unplug any [[USB]] storage devices during boot!'''
 
'''NOTE: There is a known issue with booting [[ReactOS]] from the internal HDD with a [[USB]] storage device connected which causes ROS to lose the boot device. Until this problem is fixed or a workaround is developed, please unplug any [[USB]] storage devices during boot!'''
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== Overview ==
 
== Overview ==
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== See Also ==
 
== See Also ==
 
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* [[Supported USB Devices]]
*[[Supported USB Devices]]
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* [[LiveUSB|LiveUSB - Booting from a USB disk]]
 
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* [[User:Illen/RAM_Boot|USB RAM Boot]]
*[[USB Todo]] List
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* [[USB Testing]]
  
 
== Links ==
 
== Links ==

Latest revision as of 14:05, 7 December 2020

The USB stack is the component that provides the communication between USB devices and their respective drivers and applications. It consists of multiple files, each with a distinct function. The USB stack in ReactOS is currently limited. This page documents the development of the new USB stack. Development work on a USB 3 stack is in progress.

Icon speedy deletion.png Warning: With current versions of ReactOS, USB support is NOT advanced enough to successfully work with complex USB devices such as web-cameras, sound cards and etc. Please mind that system may crash due problem caused by such USB-device. If possible, it is better to avoid using USB devices together with ReactOS, unless this is the main purpose of your experiment.


NOTE: There is a known issue with booting ReactOS from the internal HDD with a USB storage device connected which causes ROS to lose the boot device. Until this problem is fixed or a workaround is developed, please unplug any USB storage devices during boot!


Overview

The goal is to develop a USB stack which:

  • is USB 1.1 – 2.0 compliant
  • uses WDM (NT 5) API
  • is compatible with all USB devices and drivers (which adhere to the standard)

The entire stack will be fully documented and the implementation progress detailed on this page.

Goals

  • Primary Goal: USBHID (human input devices) and storage functionality working (Alpha).
  • Secondary Goal: Audio and other support added.
  • Beyond: testing and debugging.

Due to the complexity and size, no release dates will be provided as of now.

Status

USB Core Status

  • There are 2 USB specifications for the USB 1.1 standard. Devices that are used in this standard are mice, keyboards, etc.
    • OHCI (Open Host Controller Interface Standard) – All transfers types are implemented (bulk, iso, control, interrupt)
    • UHCI (Universal Host Controller Interface Standard) – Totally missing. Though it should be do-able to use OHCI driver as a base and use Haiku driver
  • EHCI (Enhanced Host Controller Interface) – Implemented transfer types: bulk & control. Interrupt & Isochronous transfers are not implemented. Due to the missing transfer types, devices who utilize those transfer types will not be available.
  • USBHUB – driver for managing port and hubs – Implementation state is unknown – Michel Martin has more information on that

USB Mass Storage Support Status

USB Mass Storage is implemented in USBSTOR driver and is fully working. Tested in WinXP + USBEHCI + USBSTOR. Mass storage support requires bulk and control transfers, which are implemented in USBEHCI.

HID Status

The HID framework is built on 5 drivers

  • HIDUSB – this is the interface driver for the USB bus. Currently supported devices are mice. Basic keyboard support should also work currently.
  • HIDCLASS – this is the class driver for HIDUSB and others. Functionality for mice & keyboard is implemented, though support for sending output reports is not implemented.
  • MOUHID – mouse function driver for USB hid standard – Fully implemented and working.
  • KBDHID – keyboard function driver for the hid standard – 90% implemented, needs KbdHid_InsertScanCodes implemented for keyboard scan code dispatching to kbdclass and led status indicator support (which requires sending output reports).
  • HIDPARSE – driver for parsing report descriptors – functionality implemented for mice, keyboard support needs HidParser_TranslateUsage fully implemented for modifier state (caps lock, num lock, scroll lock).

What already works

  • Mouse support has been tested in WinXP with ReactOS USBOHCI + HIDUSB + HIDCLASS + MOUHID + HIDPARSE and is working. The USB + HID stack also works in ReactOS.
  • Basic Keyboard support is nearly ready.
  • USB Mass storage support – Needs mountmgr / partmgr driver implemented. Will also need mountvol and other missing PnP stuff. - needs a few more issues to be resolved

See Also

Links

References