Re: [linux-sunxi] Re: A20, VGA
On R, 2022-04-29 at 03:58 -0700, Daft Soft wrote: > Sorry, forgot to mention. My DT settings are: It maynot help but some time ago I used this Armbian device tree overlay to get VGA working on A20 Cubietruck https://gist.github.com/artizirk/636e3fe9320bb0f6af9c419a79157346 -- You received this message because you are subscribed to the Google Groups "linux-sunxi" group. To unsubscribe from this group and stop receiving emails from it, send an email to linux-sunxi+unsubscr...@googlegroups.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/linux-sunxi/4cb39126cd54b5117697ff8ae317d27cb13dc6e8.camel%40gmail.com.
Re: [linux-sunxi] A20 SOM EVB: NAND -> U-Boot -> SATA
On T, 2022-02-22 at 04:36 -0800, Daft Soft wrote: > I'm working on booting A20 (Olimex A20-SOM) from NAND Can you tell us what board version of Olimex A20-SOM you have? Starting from revision E[1], there should be a SPI flash chip on board that should be much easier to get booting[2]. My experience with NAND on A20 has been on Cubietech Cubietruck board and it has never worked well with mainline. [1]: https://github.com/OLIMEX/SOM/blob/master/A20/A20-SOM/Revision_changes.txt [2]: https://linux-sunxi.org/Bootable_SPI_flash -- You received this message because you are subscribed to the Google Groups "linux-sunxi" group. To unsubscribe from this group and stop receiving emails from it, send an email to linux-sunxi+unsubscr...@googlegroups.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/linux-sunxi/0111dac4e48278b5b56b3a6fc264939ba48be4cd.camel%40gmail.com.
Re: [linux-sunxi] Boot to FEL mode with fastboot or adb shell
On T, 2020-06-02 at 22:33 -0500, Matt Krenik wrote: > Hello Arti, > > Thanks so much for your detailed reply. I tried the first suggestion > of just zeroing out the initial SPL loader. Its not clear if I > accessed the correct location, because there is no /dev/mmcblk0. > Instead I tried a few different options, including: '/dev/block/by- > name/boot' '/dev/block/by-name/bootloader' and '/dev/block/nanda'. > In each of the cases, I believe the device is getting past the > initial SPL loader, but is getting stuck on the main bootloader. I'll > keep trying to find out what memory device could store the initial > SPL loader. Its possible that SPL is stored in raw NAND or in a SPI Flash chip. You probably have to hook up serial console to figure that out. > I did notice that when I probe 'lsusb' when the device is first > starting, the device appears in flash mode for a small window of time > before loading the bootloader. I have been unable to figure out a way > to take advantage of this to flash the device (I tried starting the > sunxi-livesuite gui), since it proceeds to the bootloader. This was > surprising to me according to the documentation on the Sunxi linux > wiki. Its clear that I'm working with some custom/vendor firmware > that might differ from what is standard. > > Again, thanks for your help. It seems that I'm on my own since I'm > working with hardware that differs from what this community supports. > But if you have any tips on what I can investigate, I would find it > extremely helpful. > > Best, > Matt -- You received this message because you are subscribed to the Google Groups "linux-sunxi" group. To unsubscribe from this group and stop receiving emails from it, send an email to linux-sunxi+unsubscr...@googlegroups.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/linux-sunxi/5281ce053fc8cb663a862c8130a8107abbcf0c44.camel%40gmail.com.
Re: [linux-sunxi] Boot to FEL mode with fastboot or adb shell
On T, 2020-05-26 at 15:21 -0700, Matt Krenik wrote: > Is there a way that I can overwrite or corrupt the bootloader > partition from the adb shell or with a fastboot command so that it > will fail on the next reboot and enter FEL mode? You could simply zero out the Initial SPL Loader dd if=/dev/zero of=/dev/mmcblk0 bs=1024 count=40 Or you could write the special fel-boot sd card image into the internal storage https://linux-sunxi.org/FEL#Through_a_special_SD_card_image Mainline U-Boot defines a nice partition table[1] that allows you to write the fel-sdboot image file[2] quite easily by running following commands fastboot oem format fastboot flash loader1 fel-sdboot.sunxi fastboot reboot And after that boot with a clean U-Boot via FEL[3] Nicer options would be to add a custom boot-to-fel oem command to u- boot fastboot implementation[4] But I think the best way would be to figure out a way to trigger FEL via the FEL/UBOOT pin because it will be more reliable those hackish methods. [1]: https://gitlab.denx.de/u-boot/u-boot/-/blob/v2020.04/include/configs/sunxi-common.h#L467 [2]: https://github.com/linux-sunxi/sunxi-tools/blob/master/bin/fel-sdboot.sunxi [3]: https://plaes.org/technotes/embedded-systems/sunxi-notes/ [4]: https://gitlab.denx.de/u-boot/u-boot/-/blob/v2020.04/drivers/fastboot/fb_command.c -- You received this message because you are subscribed to the Google Groups "linux-sunxi" group. To unsubscribe from this group and stop receiving emails from it, send an email to linux-sunxi+unsubscr...@googlegroups.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/linux-sunxi/a91316cf023da1a29770a65bfa5c8ce48b551532.camel%40gmail.com.
Re: [linux-sunxi] Luke and Pine64 at FOSDEM booth
> Just saw Luke and Pine64 guys will have some booth at Fosdem: > > https://archive.fosdem.org/2018/stands/ > That link is for last years fosdem -- You received this message because you are subscribed to the Google Groups "linux-sunxi" group. To unsubscribe from this group and stop receiving emails from it, send an email to linux-sunxi+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
