Check USB status in Linux

簡單介紹一下如何在Linux OS下查看USB的控制器與其它資訊，一個非常簡單的方法是透過lspci，如下所示:

[root@s1 ~]# lspci | grep -i usb

00:07.2 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller (rev 16)

00:07.3 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller (rev 16)

可以看出這台老PC只支援USB 1.x 

PS. USB 控制器:

-UHCI: USB 1.x Inetl/VIA mb

-OHCI: USB 1.x 非Intel/VIA mb

-EHCI: USB 2.0

另外一個包含非常多USB資訊的檔案:

[root@s1 ~]# cat /proc/bus/usb/devices 

T:  Bus=02 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#=  1 Spd=12  MxCh= 2

B:  Alloc=  0/900 us ( 0%), #Int=  0, #Iso=  0

D:  Ver= 1.10 Cls=09(hub  ) Sub=00 Prot=00 MxPS=64 #Cfgs=  1

P:  Vendor=0000 ProdID=0000 Rev= 2.06

S:  Manufacturer=Linux 2.6.18-53.el5 uhci_hcd

S:  Product=UHCI Host Controller

S:  SerialNumber=0000:00:07.3

C:* #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr=  0mA

I:  If#= 0 Alt= 0 #EPs= 1 Cls=09(hub  ) Sub=00 Prot=00 Driver=hub

E:  Ad=81(I) Atr=03(Int.) MxPS=   2 Ivl=255ms

T:  Bus=01 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#=  1 Spd=12  MxCh= 2

B:  Alloc=  0/900 us ( 0%), #Int=  0, #Iso=  0

D:  Ver= 1.10 Cls=09(hub  ) Sub=00 Prot=00 MxPS=64 #Cfgs=  1

P:  Vendor=0000 ProdID=0000 Rev= 2.06

S:  Manufacturer=Linux 2.6.18-53.el5 uhci_hcd

S:  Product=UHCI Host Controller

S:  SerialNumber=0000:00:07.2

C:* #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr=  0mA

I:  If#= 0 Alt= 0 #EPs= 1 Cls=09(hub  ) Sub=00 Prot=00 Driver=hub

E:  Ad=81(I) Atr=03(Int.) MxPS=   2 Ivl=255ms