View source for VAR-SOM-AM33 NAND Flash Burning

= Flash Images to NAND  =
== using nand-recovery.sh script ==
Variscite provides a sample script which burns all required images (MLO, U-BOOT, zImage, device tree, and UBI rootfs) to NAND-Flash.<br>
For sample script, please refer to : https://github.com/varigit/meta-variscite-amx3/blob/master/utils/nand-recovery.sh <br>
In the above example script, NAND-Flash binaries reside in /opt/TISDK on the SD-Card

== Step by step manual flashing of NAND binaries ==

Replacing Nand Flash images can be done from either Linux user space or U-Boot. 
<u>From Linux shell</u><u></u><br> 
<pre>
  &lt;&lt; Flash MLO (4 copies) &gt;&gt;
$ flash_erase /dev/mtd0 0 0
$ flash_erase /dev/mtd1 0 0
$ flash_erase /dev/mtd2 0 0
$ flash_erase /dev/mtd3 0 0
$ nandwrite -p /dev/mtd0 &lt;MLO file&gt;
$ nandwrite -p /dev/mtd1 &lt;MLO file&gt;
$ nandwrite -p /dev/mtd2 &lt;MLO file&gt;
$ nandwrite -p /dev/mtd3 &lt;MLO file&gt;

  &lt;&lt; Install device tree &gt;&gt;
$ flash_erase /dev/mtd4 0 0
$ nandwrite -p /dev/mtd4 &lt;zImage-var-som-amx3.dtb file&gt

  &lt;&lt; Install U-Boot &gt;&gt;

$ flash_erase /dev/mtd5 0 0
$ nandwrite -p /dev/mtd5 &lt;u-boot.img file&gt;

  &lt;&lt; Install Kernel &gt;&gt;
$ flash_erase /dev/mtd6 0 0
$ nandwrite -p /dev/mtd6 &lt;uImage file&gt;
</pre>

<u>From U-Boot</u><br> 
<pre>U-Boot # mmc rescan
U-Boot # nand erase 0x0 0x280000
U-Boot # mmc rescan
U-Boot # fatload mmc ${mmc_dev} ${loadaddr} MLO
U-Boot # nand write ${loadaddr} 0x0 0x20000
U-Boot # nand write ${loadaddr} 0x20000 0x20000
U-Boot # nand write ${loadaddr} 0x40000 0x20000
U-Boot # fatload mmc ${mmc_dev} ${loadaddr} u-boot.img
U-Boot # nand write ${loadaddr} 0x80000 0x1c0000
U-Boot # fatload mmc ${mmc_dev} ${loadaddr} uImage
U-Boot # nand erase 0x280000 0x500000
U-Boot # nand write ${loadaddr} 0x280000 0x500000
</pre>