Re: imx21-hcd bugs, device descriptor read/64, error -110

Hi All,

> I'd expect are turned off in that code.  So the real OHCI driver, or
> maybe the isp116x code (OHCI-ish but likewise not real OHCI) would
> probably offer more useful guidance.
>
> - Dave

  I am now developing a USB driver for IMX21 based on the OHCI S3C2410
USB driver (since both are ARM based). I have made the changes in
ohci.h for the register's physical addresses (I could not map every
field - I did as many as I could map).

   My USB hub has been detected by the kernel. And there are three
ports on the system - 1 USB host port and 2 USB device ports. The Hub
says that 0 ports have been detected.

hub 1-0:1.0: USB hub found
hub 1-0:1.0: 0 ports detected

    I could trace out that USB ports information is got from
get_hub_descriptor method in hub.c. This sends a control message to
get the descriptor. Here is where it is finding zero ports.

  What is this command? Isnt this command from the USB specification
and hence should be a standard? In that case I will not need to worry
about the command.

  What does this do? Is this returning 0 ports due to mismatched
physical addresses? Where else could have this gone wrong?

Thanks,
Midhun.

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