Yes, the u-boot is based off of 2010.12: The source with the odroid-u2 (Exynos4412) mods are in https://github.com/hardkernel/u-boot
You are right, the problem is in enabling USB. I do not seem ot find documentation as to the IO addresses and what values to poke/peek in them to initialize and power on the USB PHY. There is however a linux source tree which has support for this device, which works the USB quite well. I am trying to steal and grab the initialization steps from the linux kernel and pull it into u-boot. The files that I seem to need to modify are mainly in drivers/host/usb/ehci-exynos.c with some usb phy power code in system.c/power.c in arch/arm/cpu/armv7/exynos/ in u-boot. The linux src tree that I am trying to decipher is in arch/arm/mach-exynos/setup-usb-phy.c Thanks - Suriyan On Mon, Jul 8, 2013 at 12:47 PM, Lukasz Majewski <l.majew...@majess.pl>wrote: > On Mon, 8 Jul 2013 11:03:05 -0700 > Suriyan Ramasami <suriya...@gmail.com> wrote: > > > Hello Lukasz, > > Thanks for your response. I guess I was not very clear with my > > question. > > > > u-boot code already exists for the odroid-u2 (that is what it > > uses). > > So I assume that the u-boot code was the part of the BSP? > The problem then seems to be with enabling and building the usb code? > > Another question is, how close your odroid's u-boot is to the mainline? > Which version of u-boot do you have? > > > Unfortunately, it does not have USB support. I am looking at > > just adding the EHCI and USB (uses a 3503A) part of the code. > > > > I checked the TRATS2 patch and it too does not have any code that > > touches the USB part of things. > > This is true. We aren't using EHCI (USB Host). Instead we are > supporting USB Device + Composite layer + Gadgets (like DFU + UMS). > Support for those devices is "almost" in mainline :-). > > Regards, > Lukasz Majewski > > > > > Thanks > > - Suriyan > > > > > > On Sun, Jul 7, 2013 at 11:56 PM, Lukasz Majewski > > <l.majew...@samsung.com>wrote: > > > > > On Sun, 07 Jul 2013 02:15:17 -0700, Suriyan Ramasami wrote: > > > > > > Hi Suriyan, > > > > > > > Hi wonderful folks! > > > > > > > > I own an odroid-u2 and the u-boot that comes with it does not > > > > have usb support. Its configuration is smdk4412 and I do not find > > > > that in the u-boot sources. I see it in the arndale and harkernel > > > > branches. > > > > > > > > I do see that usb support was added to the arndale platform - > > > > which is exynos5 based. Is it easy to port it for exynos4412? > > > > > > Patches for Exynos4412 based board (TRATS2) were already sent on the > > > mailing list: > > > > > > > > > > http://thread.gmane.org/gmane.comp.boot-loaders.u-boot/161578/match=introduce+samsung's+new+board+trats2 > > > > > > Please refer to them. It shall be relatively easy to add odroid-u2 > > > support based on TRATS2. > > > > > > > > > > > I did try it porting on my own accord and am listing it > > > > below... > > > > > > > > I seem to be hitting issues in drivers/usb/host/ehci-exynos.c > > > > -> function setup_usb_phy(struct exynos_usb_phy *usb). > > > > Would passing the correct address of usb for the exynos4412 do the > > > > trick? If so what should it be? > > > > In this same file ehci_hcd_init() uses gpio->x3 and gpio->d1. In > > > > exynos4 looks like x3 is from gpio_part2. Also, do the d1 and x3 > > > > translate to the same gpiod1 and gpiox3 in the exynos4412? > > > > > > > > Furthermore, ehci-exynos.c uses functions from > > > > arch/arm/cpu/armv7/exynos/system.c which for the most part are > > > > exynos5 oriented and do nothing for exynos4. > > > > > > > > Can someone guide me as to what I could do, or some pointers to > > > > helpful docs? I do have the Exynos 4412 user manual. > > > > > > > > Thanks > > > > - Suriyan > > > > > > > > > -- > > > Best regards, > > > > > > Lukasz Majewski > > > > > > Samsung R&D Institute Poland (SRPOL) | Linux Platform Group > > > > >
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