Ack, never mind. I forgot to do a mknod.
Odd way to have an error though...
>
> I am using a modified ACM driver to talk to a communications device. On
> one machine the driver seems to work ok and I am able to open a tty port
> to it. However on a different machine no such luck, the open to a tty
> gives a bad file descriptor. Don't pay any attention to that; the error
> is further down...
>
> Both machines are using a usb-uhci.o module. Both are running 2.2.15 with
> the most recent backport. On one machine no error messages, on the other
> I am getting this in the log:
>
> Jun 13 14:52:40 localhost kernel: usb-uhci-debug.h: TD @c11bfda0/011BFDA0, Ma
> xLen=3f DT0 EP=3 Dev=2 PID=( IN ) buf=01f916f0
> Jun 13 14:52:40 localhost kernel: usb-uhci-debug.h: Len=7ff e2 SPD IOC
> CRC/Timeo
> Jun 13 14:52:40 localhost kernel: usb-uhci-debug.h: TD Link Terminate
>
> Ok, so I looked at it on the analyzer.
>
> It goes something like this:
> IN ADDR=2 ENDP=5 -> DATA=FF 00 -> ACK
> SETUP=0xB4 ADDR=2 ENDP=0 -> ACK
> IN ADDR=2 ENDP=3 DATA =00 00 00 00 -> ACK
> IN ADDR=2 ENDP=0 -> NAK
> IN ADDR=2 ENDP=0 -> STALL(0x78)
>
> Then it goes into some odd behavior where it does INs to ENDP=3 and gets
> zero length data packets back.
>
> On the working machine instead of a STALL it gets another NAK and then it
> does another IN and gets a 0 length data block. It then seems to proceed
> normally.
>
> Since the device, driver, usb stack, kernel are all the same... I suspect
> some incompatibility with my host controller and the stack. Any thoughts?
>
> I have put the two traces online at:
> http://www.eecs.umich.edu/~mcorner/usbworking.usb
> http://www.eecs.umich.edu/~mcorner/usbnotworking.usb
>
> Thanks.
>
> ----
> Mark Douglas Corner
> [EMAIL PROTECTED]
>
>
>
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Mark Douglas Corner
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