On Thu, Aug 16, 2018 at 8:38 PM Baruch Siach <bar...@tkos.co.il> wrote: > > Hi Chris, > > Chris Packham writes: > > On Tue, Aug 14, 2018 at 3:25 AM Baruch Siach <bar...@tkos.co.il> wrote: > >> From: Jon Nettleton <j...@solid-run.com> > >> > >> This patch accomplishes 2 things to make the kwboot procedure > >> on the a38x more reliable. > >> > >> 1) We fill the tty with 1K of the magic bootparam. This helps > >> with the timing of where the microcode picks up in the read of > >> the line to ensure we actually catch the break to go into recovery > >> mode > >> > >> 2) Before starting the xmodem transfer we sleep for 2 seconds > >> and then flush the line. This allows all the magic bootparam > >> to be flushed from the line and makes the xmodem transfer reliable > >> and removes the Bad message failures. > >> > >> Signed-off-by: Jon Nettleton <j...@solid-run.com> > >> Signed-off-by: Baruch Siach <bar...@tkos.co.il> > >> --- > > > > Reviewed-by: Chris Packham <judge.pack...@gmail.com> > > Thanks. > > > Lately I haven't had much luck with using kwboot on a38x. I seem to be > > able to get the spl to boot from uart (even better now thanks to this > > patch) but the next stage still loads from SPI. I haven't been brave > > enough to blank a board to see if that changes behaviour. Are your > > experiences any different? I'm wondering if there is something we need > > to do in the SPL to figure out that we need to load the next stage via > > xmodem. > > It works for me here on the Clearfog. > > The code that determines the seconds stage load device is in > arch/arm/mach-mvebu/spl.c:get_boot_device(). Does the code there get it > right? What do you read from CONFIG_BOOTROM_ERR_REG? >
I get the following from enabling the debug BOOTROM_REG=0x63001000 boot_device=0x0 SAR_REG=0xcb20b342 boot_device=0x34 BOOTROM_REG=0x63001000 boot_device=0x0 SAR_REG=0xcb20b342 boot_device=0x34 The strapping is for SPI so the second part isn't surprising. _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de https://lists.denx.de/listinfo/u-boot