diff options
| author | Gerd Hoffmann <kraxel@redhat.com> | 2010-12-03 16:17:28 +0100 |
|---|---|---|
| committer | Gerd Hoffmann <kraxel@redhat.com> | 2011-05-26 11:57:09 +0200 |
| commit | 94527ead7e9f4c6bc193754000a61b15939e6c1e (patch) | |
| tree | 3e3c2f8863d5de2a9d3f5e8f61a231d4d6027435 /docs/usb2.txt | |
| parent | eb5e680ae5a72b999946e5618c501648367734a8 (diff) | |
usb: add ehci adapter
This patch finally merges the EHCI host adapter aka USB 2.0 support.
Based on the ehci bits collected @ git://git.kiszka.org/qemu.git ehci
EHCI has a long out-of-tree history. Project was started by Mark
Burkley, with contributions by Niels de Vos. David S. Ahern continued
working on it. Kevin Wolf, Jan Kiszka and Vincent Palatin contributed
bugfixes.
/me (Gerd Hoffmann) picked it up where it left off, prepared the code
for merge, fixed a few bugs and added basic user docs.
Cc: David S. Ahern <daahern@cisco.com>
Cc: Jan Kiszka <jan.kiszka@web.de>
Cc: Kevin Wolf <mail@kevin-wolf.de>
Cc: Vincent Palatin <vincent.palatin_qemu@m4x.org>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Diffstat (limited to 'docs/usb2.txt')
| -rw-r--r-- | docs/usb2.txt | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/docs/usb2.txt b/docs/usb2.txt new file mode 100644 index 0000000000..b283c138e0 --- /dev/null +++ b/docs/usb2.txt @@ -0,0 +1,38 @@ + +USB 2.0 Quick Start +=================== + +The QEMU EHCI Adapter does *not* support companion controllers. That +implies there are two completely separate USB busses: One USB 1.1 bus +driven by the UHCI controller and one USB 2.0 bus driven by the EHCI +controller. Devices must be attached to the correct controller +manually. + +The '-usb' switch will make qemu create the UHCI controller as part of +the PIIX3 chipset. The USB 1.1 bus will carry the name "usb.0". + +You can use the standard -device switch to add a EHCI controller to +your virtual machine. It is strongly recommended to specify an ID for +the controller so the USB 2.0 bus gets a individual name, for example +'-device usb-ehci,id=ehci". This will give you a USB 2.0 bus named +"ehci.0". + +I strongly recomment to also use -device to attach usb devices because +you can specify the bus they should be attached to this way. Here is +a complete example: + + qemu -M pc ${otheroptions} \ + -drive if=none,id=usbstick,file=/path/to/image \ + -usb \ + -device usb-ehci,id=ehci \ + -device usb-tablet,bus=usb.0 \ + -device usb-storage,bus=ehci.0,drive=usbstick + +This attaches a usb tablet to the UHCI adapter and a usb mass storage +device to the EHCI adapter. + +enjoy, + Gerd + +-- +Gerd Hoffmann <kraxel@redhat.com> |