Re: Problem with usb in FreeBSD 4.8....help!!!

From: jitendra pande (jpande_techinfo_at_yahoo.com)
Date: 03/29/04

  • Next message: Dan Nelson: "Re: MS_ASYNC with MS_INVALIDATE" 
    Date: Mon, 29 Mar 2004 06:15:56 -0800 (PST)
To: freebsd-hackers@freebsd.org

    Hi Toni,
     
    Thanks a lot for the information.
     
    My device is the one which supports control transfers only thus i understand that for a second device i need to use /dev/ugen1 and so on.
     
    Does that mean, i need to explictly make a node /dev/ugen1 and /dev/ugen2 and so on for every newly added USB device using MAKEDEV script.
     
    Please advise me , if there exist some better way of handling the situation. Is there some sort of modification that i can make to libusb to handle the situation.
     
    Thanks and regards
    Jitendra
     
    Toni Andjelkovic <toni@soth.at> wrote:
    On Sun, Mar 28 2004 (02:51:56 -0800), jitendra pande wrote:
    > My application uses libusb for iinteracting with the usb devices...
    > libusb on freeBSD 4.8 tries to find /debv/ugen0, /dev/ugen1 and so
    > on....hence couldn't able to detect more then one device.
    ...
    > FreeBSD 4.8 and FreeBSD 5.0

    Note that the port version of libusb (0.1.7_1) ignores device endpoints
    (/dev/ugenX.Y), so it may be necessary to find and open them by yourself.

    Also note that opening the control endpoint (/dev/ugen0) instead
    will prevent libusb from finding the device, because FreeBSD allows
    the control endpoint to be open only once:

    usb_os_find_devices: couldn't open device /dev/ugen0: Device busy

    Also note that on 5.x (or -CURRENT) there are other problems to
    watch out for:

    http://www.freebsd.org/cgi/query-pr.cgi?pr=kern/63375

    Cheers,
    Toni
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  • Next message: Dan Nelson: "Re: MS_ASYNC with MS_INVALIDATE"

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