On Wed, Sep 28, 2016 at 10:47 PM, Sergey Kubushyn ksi@koi8.net wrote:
On Wed, 28 Sep 2016, Jagan Teki wrote:
On Sun, Jun 19, 2016 at 3:14 AM, Sergey Kubushyn ksi@koi8.net wrote:
Here is yet another version, diff made against latest u-boot-imx master.
Actual code moved from drivers/mtd/nand to /arch/arm/imx-common, some functions renamed. No other changes.
<snip>
return CMD_RET_USAGE;} @@ -766,6 +816,17 @@ static char nand_help_text[] = " 'addr', skipping bad blocks and dropping any pages at the end\n" " of eraseblocks that contain only 0xFF\n" #endif +#ifdef CONFIG_CMD_NAND_BOOTUPDATE
"nand bootupdate - [addr] [size]\n"What is the addr here the nand offset or the ddr addr? I tried of doing the same but unable to boot any help?
It is where the actual U-Boot image is loaded in RAM. If "nand bootupdate" is done right after reading U-Boot binary into RAM (e.g. with ext4load) those can be both omitted.
As a matter of fact I'm finishing a bunch of changes to U-Boot, including that bootupdate command and 2 new boards right now and going to submit all that either tonight or tomorrow.
NAND bootupdate works like a charm here and we do actually use it in actual production environment with both Linux and Android; firmware updates do update U-Boot itself as a part of regular network (or OTA how it is called in Android) updates.
Will try to write a small README file on that if times permitted.
True, good to have.
Please note that it has been only tested on i.MX6 (don't have anything else here; all our boards are i.MX6D/Q/DL.) We do not use SPL.
As of your case I'm not exactly sure what you are trying to achieve. That entire NAND boot thing with all FCB/DBBT/whatever only applies to INITIAL boot off of raw NAND device. It allows to boot either the full U-Boot or SPL using i.MX6 NAND ROM boot routine that reads that FCB and whatever else then loads actual binary (either U-Boot or SPL or whatever) according to information in that FCB and runs it.
If you are booting your SPL off of some other media and then trying to load second stage U-Boot from raw NAND you don't need all that FCB kabang. The DCB part (if U-Boot is built as i.MX6 image) is also not needed so it can be stripped or skipped. However your SPL must properly configure NAND itself so it would be able to read from it and it should include all stuff required to actually read data from NAND.
The FCB/DBBT stuff is only needed for initial boot off of raw NAND. If you are going to boot off of NAND and want to have your U-Boot in NAND (that is the only logical use of NAND for U-Boot) I can not see any reason for going SPL road but you might have your own reasons that I don't know.
Since ROM expects the FCB/DBBT this tool adding that so I updated SPL and written u-boot-dtb.img using 'nand write'
thanks!