[Arm-netbook] Allwinner F20 (sun3i) SD/MMC boot minimal 'blinking led' app

[sysfwlab]

Hello Mr Tom & Mr Henrik,
Whaou...I spend a lot of  hours reading yours gits....it's an honor to 
speak with you Misters
Thanks for your help and information, i probably need your help to 
bundle the sun3i.h modifications for u-boot...
Have good day
Sysfwlab

Le 17/05/2012 03:19, Tom Cubie a écrit :
>
>
> On Thu, May 17, 2012 at 6:53 AM, sysfwlab <sysfwlab at gmail.com 
> <mailto:sysfwlab at gmail.com>> wrote:
>
>     Hello Everybody, hello Henrik,
>
>     Thanks a lot for you response.
>     Good news i can confirm and demonstrate F20 can boot from SD/MMC !
>
>     After reading your u-boot and linux source I build a small and
>     minimalistic piece of code that blink all the pin can be used by
>     UART No
>     clock setting, no watchdog reset, only GPIO init...
>     I use mksunxiboot to add header and push it at 8K on the SD/MMC
>     and this
>     work...yip ha !!!
>     This is a real real good functionnality for this cheap cpu !
>
> it works on currently all allwinner chips and will work on the chips 
> in the future.
>
>
>     Here is a video and sources:
>     http://www.sysfwlab.com/?p=242
>
>     Now lets go to u-boot limbs...i'm trying to create the sun3i.h
>     file and
>     learn how to use git ;)
>
>     Bin
>
>     PS: i dont get a firmware of my device, but i previously dump all the
>     nand part if needed
>
>
>     Le 16/05/2012 21:43, Henrik Nordström a écrit :
>     > ons 2012-05-16 klockan 17:13 +0200 skrev sysfwlab:
>     >
>     >> My goal now is to build a bootable sd/mmc like for the A10.
>     >> I try to use the "native" allwinner-u-boot  and mksunxiboot to
>     create a mmc.
>     >> I dont got anything on the serial port, but the device dont run the
>     >> app_demo.axf (Boot1) so i think it try to boot the mmc and probably
>     >> crash but It seem to be a good thing ?
>     > You probably need other DRAM parameters on this device. The DRAM
>     > parameters is currently hardcoded in the source.
>     >
>     >> I found a kernel patch with mach-sun3i and mach-sun4i
>     separated, and i
>     >> need probably confirm that sun3i got the same map registers of
>     sun4i,
>     >> etc...i see mmc driver différence (SUN4I,SUN5I but no
>     SUN3I...), etc...
>     >> but can someone already do this and got a working sun3i mmc
>     u-boot ?
>     > There is no stand-alone u-boot for sun3i.
>     >
>     > Do you have a firmware file for your device?
>     >
>     >> - Does anyone at AllWinner technology or not can confirm me i
>     can boot
>     >> F20 from MMC ?
>     > If it hangs when booting u-boot-mmc then it can boot from MMC.
>     >
>     >> - For a minimal application which put a level on GPIO do i need to
>     >> init_clock() and clear the watch dog ?
>     >> (Can i directly set the register to init the GPIO ?)
>     > The over all structure is most likely similar to sun4i, but pins and
>     > multiplex functions quite likely differ noticeably.
>     >
>     > Regards
>     > Henrik
>     >
>     >
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> -- 
> Keep simple, stay foolish.
>
>
>
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