On Fri, 29 Aug 2003 12:25:06 +0530 "Ravi Kumar B S" <[EMAIL PROTECTED]> wrote:
| Hello, | | I've one query. I've got 4 USB ports on my system. Now, I want to configure | those ports, lets say, for disks and printers. | For that I require some specific port number or a way to recognize all the | four ports. | | As per my knowledge, USB port, device and bus mapping is only available in | /proc/bus/usb/devices file. | Similarly the directories related to buses are available in /proc/bus/usb | directory. | | I tried to plug-in different USB devices on the same port but the information | in the /proc/bus/usb/devices does not give the same port and bus mapping. | E.g, I tried connecting 2 USB devices. | /proc/bus/usb/devices recognizes the device as given below: | T: Bus=03 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#= 8 Spd=12 MxCh= 0 | T: Bus=02 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#= 9 Spd=12 MxCh= 0 | | Now, if I exchange the two devices the mapping is not the same. | T: Bus=01 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#= 10 Spd=12 MxCh= 0 | T: Bus=03 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#= 11 Spd=12 MxCh= 0 | | If I connect some other device, again the behavior will be different. | Different Devices connecting to the same port are not resulting in the same | bus-port mapping. It is not consistent. | | It changes every time we change the devices. So, I'm not able to find out how | to detect the hardware port on which the USB device is connected. | | Any pointer would be of great help. I'm skeptical also (like David). I just tested this and got the expected results -- contrary to what you show here. And it's almost always correct to include a kernel version and what patches are applied to it, if any. -- ~Randy ------------------------------------------------------- This sf.net email is sponsored by:ThinkGeek Welcome to geek heaven. http://thinkgeek.com/sf _______________________________________________ [EMAIL PROTECTED] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
