On Sun, Sep 25, 2016 at 09:34:45AM +0200, Krzysztof Kozlowski wrote: > On Sat, Sep 24, 2016 at 11:04:49PM +0200, Wolfgang Wiedmeyer wrote: > > > > Krzysztof Kozlowski writes: > > > > > On Thu, Sep 22, 2016 at 08:59:03PM +0200, Wolfgang Wiedmeyer wrote: > > >> > > >> Krzysztof Kozlowski writes: > > >> > > >> > On Thu, Sep 22, 2016 at 06:48:35PM +0200, Wolfgang Wiedmeyer wrote: > > >> >> This allows to reboot the device into recovery mode and into the download > > >> >> mode of the bootloader. > > >> > > > >> > Which bootloader? Probably UBoot... or Samsung stock one? Could you put > > >> > that information here? > > >> > > >> I'm only working with the stock one. I was under the impression that the > > >> stock bootloader cannot be replaced on a i9300 because there's a > > >> signature check. Is UBoot loaded after the stock one on Trats2 or how > > >> does this work? I didn't find information on that. > > > > > > +CC Marek, > > > > > > Trats2 is working with U-Boot. Just U-Boot. However I never converted S3 > > > into Trats2 on my own. I always used targets prepared to be "Trats2" > > > type. > > > > It would be awesome to be able to run U-Boot on i9300. Is there a way to > > test this by not risking to brick the device, e.g. by booting from the > > SD card? Then I could send an updated version of the patch that is > > compatible with U-Boot :) > > I don't think the stock bootloader supports chaining another bootloader > from SD card. There is a way of booting from SD card by shortening a > resistor but it is an emergency rescue procedure to overwrite existing > bootloader with data from SD card (to restore device). This thread might > be interesting: > http://forum.xda-developers.com/showpost.php?p=47234165&postcount=220 > https://smyl.es/samsung-galaxy-iii-s3-gt-i9300-jtag-leaked-document-how-to-repair-soft-bricked-galaxy-s3/ > > On xda-developers you might find more data about this (including the > procedure for emergency restore from SD card). Somehow people flash and > unbrick their devices when playing with CyanogenMod... Hi Wolfgang, Few more info from my side. It is (rather) not possible to just flash GT-I9300 with U-Boot. It still requires S-Boot as a primary bootloader (probably different than the stock one). I think such binary S-Boot was published along with Tizen images for Trats2 (called RD-PQ). These images however started to disappear from download.tizen.org. You can still find some, e.g.: http://download.tizen.org/releases/system/Tizen_RD-PQ_System_20130716_1.tar (better download it soon :) ) This 'tar' should be uploaded through Lthor (also from tizen.org) however it might require appropriate Partition Information Table (PIT). On Tizen Wiki you might find some guides for flashing/upgrading-PIT on Trats2. However, please be careful, as all of these steps (and linked binary) are targeted to existing RD-PQ/Trats2 boards. They are not intended as a way of converting GT-I9300 into Trats2. The conversion might work but... it might not. Before playing with it, I think it would be wise to have the emergency recovery procedure (with SD card) ready. Best regards, Krzysztof -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
