Sekhar Nori wrote:
> On 5/23/2012 8:24 AM, Jon Povey wrote:
>> I've just been trying to build musb driver modules for DM365 on
>> kernel 3.4. I am getting errors which I think are due to the
>> rearrangement of the mach-davinci/davinci.h and associated headers:
>>
>>   CC [M]  drivers/usb/musb/davinci.o
>> drivers/usb/musb/davinci.c: In function 'phy_on':
>> drivers/usb/musb/davinci.c:67: error: implicit declaration of
>> function 'IO_ADDRESS' drivers/usb/musb/davinci.c:67: error:
> 'DAVINCI_SYSTEM_MODULE_BASE' undeclared (first use in this function)
>>
>> Not sure the right way to fix, I am just bodging for now.
>
> I see this too. Looks like this was missed all along because the
> davinci_all_defconfig does not enable the MUSB davinci glue
> layer. This
> needs to be corrected too.
>
> There is a lot of machine specific code in the davinci glue
> layer which
> needs to be cleaned up for a correct solution to this issue.
>
> For now, to fix this regression, we can directly define
> USB_PHY_CTRL and
> DM355_DEEPSLEEP to the correct register addresses. Then include
> <mach/hardware.h> to get definition of IO_ADDRESS(). I guess this
> what you did too.

Pretty much, I just copied the define of DAVINCI_SYSTEM_MODULE_BASE

> Do you mind sending this to Felipe and checking if he is OK
> with taking it?

Sent. Note that USB doesn't work on DM365 at the moment, the phy_ctrl
is not set up right and the evm board file doesn't call the arch USB init.

I started with this patch:
http://linux.omap.com/pipermail/davinci-linux-open-source/2011-July/023212.html

Maybe there is some reason why DM365 USB support has not made it to mainline?

By the way:

I am trying to get this working at the moment for dual role USB mass storage as
host, and CDC serial as gadget. Based on kernel 3.0-rc7 seems more or less OK,
just that it doesn't switch back to peripheral mode once host mode has been
used. But I tried rebasing my board to 3.2 and 3.4 and things seem a lot more
broken, no reaction to USB sticks being plugged in, and plugging into a PC
gives an immediate OOPS in gadget ep0 interrupt handler. I haven't bisected any
further than that as it's quite time-consuming rebasing the board support each
time.

Let me know if you want any more info about the above. This is on our own
board and cables which control the ID pin appropriately, I don't have access to
a DM365 EVM again until July. But if someone wants me to test some DM365 USB
patches, let me know.


--
Jon Povey
[email protected]

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