USB support on i.MX27

[Alan Carvalho de Assis]

Hi Daniel,

On 11/24/09, Daniel Mack <daniel at caiaq.de> wrote:
> On Tue, Nov 24, 2009 at 09:43:41AM -0200, Alan Carvalho de Assis wrote:
>> I am trying to add USB support to i.MX27 on mainline linux kernel, I
>> am following your modifications as in this post:
>>
>> "Re: Comment to "[PATCH 7/8] Add EHCI support for MX27 and MX31 based
>> boards"
>>
>> I can't find xcvr.h and isp1504_xcvr.h then I copied fsl_xcvr.h from
>> FSL kernel to mainline:
>>
>> alan at metropolis:~/ltib-patches/ltib/rpm/BUILD/linux$ cp
>> include/linux/usb/fsl_xcvr.h
>> ~/linux/pengutronix/linux-2.6/include/linux/usb/xcvr.h
>>
>> But I can't to figure out where to find isp1504_xcvr.h.
>
> There is nothing special about the ISP1504. On the register level, it is
> compliant to generic ULPI transceivers, and hence the driver in mainline
> was named accordingly. There is nothing you need to add from the BSPs
> anymore, everything is on its way to mainline already.
>

Hmm, then don't need I to add ISP1504 driver from FSL kernel? Great!

>> Could you please help me to get USB working on iMX27ADS?
>
> There are a number of boards that implement USB support already for MX3,
> and they're all in Sascha's tree. Most of them have been added just
> recently, so make sure you're looking at the newest source. As mentioned
> above, for ISP1504, you just need create a generic ULPI transceiver.
>

I am using mxc-master updated but there is nothing related to usb or
otg on mx31lilly.c. Fortunately I figure out mx31moboard.c has it. I
will base on it for now.

> The only thing that is missing is code that maps the .flags and maybe
> .portsc settings from the mxc_usbh_platform_data struct to the
> appropriate registers on MX27. And of course, your board support will
> need some IOMUX settings.
>

Yes, to configure external pins, but I will base on old FSL kernel to
get it working.

Thank you very much again for your help and patience.

Best Regards,

Alan