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usb: update docs for bus name change 

At some point the default usb bus name changed from 'usb.0' to
'usb-bus.0' (probably as part of the qom conversion).  Update
the usb documentation accordingly.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
Gerd Hoffmann 2013-04-02 12:15:24 +02:00
parent a309ee6e0a
commit f9618633a8
1 changed files with 10 additions and 10 deletions
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20
docs/usb2.txt
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@ -11,7 +11,7 @@ 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".
the PIIX3 chipset. The USB 1.1 bus will carry the name "usb-bus.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
@ -27,7 +27,7 @@ a complete example:
-drive if=none,id=usbstick,file=/path/to/image \
-usb \
-device usb-ehci,id=ehci \
-device usb-tablet,bus=usb.0 \
-device usb-tablet,bus=usb-bus.0 \
-device usb-storage,bus=ehci.0,drive=usbstick
This attaches a usb tablet to the UHCI adapter and a usb mass storage
@ -88,22 +88,22 @@ ports (1-4), the emulated (1.1) USB hub has eight ports.
Plugging a tablet into UHCI port 1 works like this:
-device usb-tablet,bus=usb.0,port=1
-device usb-tablet,bus=usb-bus.0,port=1
Plugging a hub into UHCI port 2 works like this:
-device usb-hub,bus=usb.0,port=2
-device usb-hub,bus=usb-bus.0,port=2
Plugging a virtual usb stick into port 4 of the hub just plugged works
this way:
-device usb-storage,bus=usb.0,port=2.4,drive=...
-device usb-storage,bus=usb-bus.0,port=2.4,drive=...
You can do basically the same in the monitor using the device_add
command. If you want to unplug devices too you should specify some
unique id which you can use to refer to the device ...
(qemu) device_add usb-tablet,bus=usb.0,port=1,id=my-tablet
(qemu) device_add usb-tablet,bus=usb-bus.0,port=1,id=my-tablet
(qemu) device_del my-tablet
... when unplugging it with device_del.
@ -148,10 +148,10 @@ using for testing is bus 1 + port 1 for 2.0 devices and bus 3 + port 1
for 1.1 devices. Passing through any device plugged into that port
and also assign them to the correct bus can be done this way:
qemu -M pc ${otheroptions} \
-usb \
-device usb-ehci,id=ehci \
-device usb-host,bus=usb.0,hostbus=3,hostport=1 \
qemu -M pc ${otheroptions} \
-usb \
-device usb-ehci,id=ehci \
-device usb-host,bus=usb-bus.0,hostbus=3,hostport=1 \
-device usb-host,bus=ehci.0,hostbus=1,hostport=1
enjoy,