Bob Lockie wrote:
4 port PCI USB2 card with 4 port hub connected:
bash-2.05b# lsusb
Bus 003 Device 001: ID 0000:0000
Bus 002 Device 001: ID 0000:0000
Bus 001 Device 004: ID 05e3:0605 Genesys Logic, Inc.
Bus 001 Device 001: ID 0000:0000
4 port PCI USB2 card without hub:
bash-2.05b# lsusb
Bus 003 Device 001: ID 0000:0000
Bus 002 Device 001: ID 0000:0000
Bus 001 Device 001: ID 0000:0000
Maybe some can explain why there are not 4 busses (1 for each port)?
Alan Stern may have an idea on that.
How can what version of USB a device is using?
I have one USB2 high speed device and probably one USB2 low speed and
probably one USB1.1 (or 1.0).
Look at /proc/bus/usb/devices directly or by using 'usbview'.
Or use 'usbtree' (a lite version of /proc/bus/usb/devices).
E.g., my Maxtor hard drive is high-speed (USB2, 480 Mbpx), and it is
listed as Spd=480 (Mpbs) and Ver. 2.00:
T: Bus=09 Lev=01 Prnt=01 Port=03 Cnt=01 Dev#= 2 Spd=480 MxCh= 0
D: Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs= 1
P: Vendor=0d49 ProdID=3000 Rev=11.01
My HP printer is "full-speed" (USB lingo for 12 Mbps):
T: Bus=06 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#= 2 Spd=12 MxCh= 0
D: Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS= 8 #Cfgs= 1
P: Vendor=03f0 ProdID=6104 Rev= 1.00
I don't have a low-speed (1.5 Mbps) device attached right now.
usbtree output for my system looks like so:
/: Bus 09.Port 1: Dev 1, Class=root_hub, Driver=hub/5p, 480M
|__ Port 4: Dev 2, If 0, Class=stor., Driver=usb-storage, 480M
/: Bus 08.Port 1: Dev 1, Class=root_hub, Driver=hub/2p, 12M
/: Bus 07.Port 1: Dev 1, Class=root_hub, Driver=hub/3p, 12M
/: Bus 06.Port 1: Dev 1, Class=root_hub, Driver=hub/1p, 12M
|__ Port 1: Dev 2, If 0, Class=print, Driver=usblp, 12M
/: Bus 05.Port 1: Dev 1, Class=root_hub, Driver=hub/1p, 12M
/: Bus 04.Port 1: Dev 1, Class=root_hub, Driver=hub/1p, 12M
/: Bus 03.Port 1: Dev 1, Class=root_hub, Driver=hub/1p, 12M
/: Bus 02.Port 1: Dev 1, Class=root_hub, Driver=hub/2p, 12M
|__ Port 2: Dev 2, If 0, Class=hub, Driver=hub/4p, 12M
/: Bus 01.Port 1: Dev 1, Class=root_hub, Driver=hub/2p, 12M
or usbview will give you a GUI form of all of this info.
--
~Randy
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