On Wednesday 04 June 2014 03:11 PM, Yegor Yefremov wrote: > On Wed, Jun 4, 2014 at 10:48 AM, Roger Quadros <rogerq@xxxxxx> wrote: >> Hi, >> >> On 06/04/2014 11:25 AM, Yegor Yefremov wrote: >>> On Wed, Jun 4, 2014 at 8:40 AM, Sekhar Nori <nsekhar@xxxxxx> wrote: >>>> On Tuesday 03 June 2014 04:18 PM, Yegor Yefremov wrote: >>>>> On Tue, Jun 3, 2014 at 9:57 AM, Yegor Yefremov >>>>> <yegorslists@xxxxxxxxxxxxxx> wrote: >>>>>> Kernel: 3.14, 3.15 (I haven't tried another kernels) >>>>>> >>>>>> As soon as I write something to my NAND flash (via cat image > >>>>>> /dev/mtdblockx or ubiupdatevol) and make reboot or press a reset >>>>>> button, I see only CCCCC and nothing happens before I make a power >>>>>> cycle. Any idea? >>>>> >>>>> Just forgot to mention, that I was actually booting from MMC (mmc1). >>>>> The boot sequence is UART0...XIP...MMC0...NAND. >> >> Can you try to get XIP out of the boot sequence and see if it works? >> Maybe try to boot from mmc directly? >> >> This would prove that NAND/GPMC driver is leaving some state that doesn't >> go well with the bootROM XIP. > > This configuration is soldered. It won't be easy to change. Most likely XIP is the issue if sysboot has not changed. The way ROM works for XIP boot is: 1) Set chip select 0 base address to 0x0800'0000 2) Read memory at 0x0800'0000 3) If something else other than 0x0 or ~0x0 is found, jump to 0x0800'0000 and start executing. Can you check to see the contents of 0x0800'0000 before and after nand write using mtdblock? Thanks, Sekhar -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
