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). 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. 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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