Hi Petter, On Wed, 9 Jul 2008 23:44:08 +0200 Hans Petter Selasky <[EMAIL PROTECTED]> wrote:
> Hi Tino, > > On Wednesday 09 July 2008, Tino Engel wrote: > > Dear all, > > > > I had the chance to write my first Quirk-PR and therefore took some > > time looking at the FreeBSD usb system. > > I am thinking that the solution there is is not the ideal > > one. Through mailing list discussions I read, I also have the > > impression, that the usb part of the cam subsystem is kind of a > > problem child. > > I read through parts of the usb code and am kind of understanding > > it. So I am trying to make an attempt to help improving it. That > > means, that I would like to discuss some ideas and in case this is > > wanted, volunteer to do some coding. > > > > What I was thinking so far is: > > > > Since Windows and Linux can handle most of the the devices FreeBSD > > needs a quirk for out of the box, and at least in the case of > > linux, I believe they do not hold all quirks in a db, there must be > > a way of doing it. > > > > My idea so far is to do something like this: > > - When a usb device is connected, try to use it without quirks. > > - If it stalls, cache device id data > > - Then emulate a disconnect/connect > > Yes, this is possible. But unfortunately some devices are very crappy > and even if you do a USB BUS reset, they will malfunction after the > invalid command, simply because the USB software on the dongle has > crashed :-) Or the endpoint state is not correct. > > > - Then try all permutations of possible quirks (most common to less > > common?) for the device > > - As soon as one permutation causes device not to stall -> done > > I assume that you are thinking about Mass Storage devices. You might > be interested in looking at: > > http://www.selasky.org/hans_petter/isdn4bsd/sources/src/sys/dev/usb2/core/usb2_msctest.c > Yes, your Assumption is right. I am about mass storage. I have looked your at the code. As far as I can see the whole package it is meant as a replacement for the existing usb-driver in freebsd. (Correct me if I am wrong) But it seems to be installed just as an addon... How does that interfere with what is existing in freebsd? Can you please tell me a little more about the plans of merging this into freebsd? > > > > Anyhow my knowledge concerning the topic is not too in-deep, but I > > would be happy to gather some feedback concerning my idea and maybe > > about other approaches in this area. > > How much time are you willing to spend on this ? > > --HPS I am willing to spend about 5h a week, from time to time more. (depends on things like job-workload, weather, etc...) Anyhow I am more into doing than into planning, so i would be happy to help, when some surroundings have been clarified to me. (i.e. develop on top of what, what to do exactly, etc...) Greez, Tino _______________________________________________ [email protected] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-usb To unsubscribe, send any mail to "[EMAIL PROTECTED]"
