[U-Boot] No power on USB host of IMX25 PDK

[Hugo Holgersson]

On 11/04/2011 05:24 PM, Fabio Estevam wrote:
> On Fri, Nov 4, 2011 at 2:06 PM, Hugo Holgersson
> <hugoh at student.chalmers.se>  wrote:
>> Thanks for the input!
>>
>> Putting the mux code to generic.c, as it was done for the UART's pins, did not change anything...
>>
>> I write MXC_EHCI_MODE_SERIAL to&ehci->portsc. Exactly the same behavior. Same log.
>>
>> But the question (1) remains; which is the register (the address) of where mxc_set_usbcontrol()
>> is supposed to write to? I understand Linux use http://lxr.linux.no/#linux+v3.1/arch/arm/mach-imx/ehci-imx25.c
>> uses the IMX_USB_BASE + 0x600 address... But, to me this is outside the usb_ehci-struct, so I
>> cannot figure out what register that is located at that address.
>>
>> Guessing, what about the following possible candidates inside the usb_echi-struct?
>> usb_ehci->usbgenctrl
>> usb_ehci->hwgeneral
>> usb_ehci->control
>> usb_ehci->isiphyctrl
>>
>> I need to find some docs on the controller's registers to understand that.
>
> You need to check MX25RM (Reference Manual) available at
> http://www.freescale.com/webapp/sps/site/prod_summary.jsp?code=i.MX257&nodeId=018rH3ZrDR6B45&fpsp=1&tab=Documentation_Tab
>
> Regards,
>
> Fabio Estevam
>

#define USBCTRL_OTGBASE_OFFSET	0x600
should maybe be called just USB_CTRL_OFFSET.

According to the reference manual, it is a "USBOH"-register. Concerning 
both of the two, independent cores (OTG and "Host") of the chip.
(Page 1747)

So, it is indeed outside the usb_ehci struct! Sorry!

Best regards,

Hugo Holgersson