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List:       libusb-devel
Subject:    Re: [libusb] Using libusb on kernel version >=3.6
From:       Einar Már Björgvinsson <Einar.Bjorgvinsson () marel ! com>
Date:       2013-09-28 11:12:17
Message-ID: 76E1146DEE728E4E95C1C6D1EEA1DBA9E4E8CA36 () GRBSR0004 ! marel ! net
[Download RAW message or body]

Hi there and thanks for your response. 

We are using Udev 175 and libusb 1.0.16. 

I think I have a better picture of this now. My main interest was to know how libusb \
operates in regards to the USB devices and now I can see we just have to let Udev \
create those links.  I think I understand now, I will create the udev rule that fits. \


thanks alot.

Regards
Einar
________________________________________
From: Alan Stern [stern@rowland.harvard.edu]
Sent: Saturday, September 28, 2013 2:21 AM
To: Xiaofan Chen
Cc: Einar Már Björgvinsson; libusb-devel@lists.sourceforge.net
Subject: Re: [libusb] Using libusb on kernel version >=3.6

On Sat, 28 Sep 2013, Xiaofan Chen wrote:

> On Wed, Sep 25, 2013 at 10:09 PM, Einar M�r Bj�rgvinsson
> <Einar.Bjorgvinsson@marel.com> wrote:
> > Hi
> > 
> > I would like to know how to use libusb without the /dev/usbdevxx which I
> > believe was deprecated in kernel 2.6, the usbfs that is to say ?
> > I have cross-compiled version 1.15 of the library for powerpc platform and
> > it crashes with the failure of not finding /dev/usbdevxx.
> > 
> 
> /dev/usbdevxx is only used if neither /dev/bus/usb (most of the modern
> Linux distros) nor the deprecated usbfs mount /proc/bus/usb exist.
> 
> Ref: https://libusb.org/ticket/119
> 
> So you need to check if your PowerPC kernel is configured properly
> with usb support.

The files under /dev/bus/usb are created by udev (or something
equivalent).  Einar should check to see what version of udev is being
used.

Alan Stern


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