New uBoot for KD20 (OXNAS PLX 7821) [Dev] (10 replies)

This topic is for developing for a new / better uBoot for the Suttle KD20 NAS.

Maingoals:
- Upgrade Uboot to 2014.10 newer
- Full SATA boot (stage1, uBoot, kernel, rootfs) -> Important to make a serial/UART connection not nessesary
- Boot from USB (kernel, rootfs)
(- Boot from SD/MMC)

Status Quo:
- vendors uBoot can be booted form sata but did not load the disk.
- other uboots (bodhi, kref's) can boot from Sata but only load one disk.
- 2014.10 uBoot from openwrt can be loaded from vendors uboot
- usb did not working with any uBoot

Data:

Vendors Uboot source (there are 2?!)
uBoot+spl
uBoot
---------------------------------------------------------------------------------------------------------------------------
As my primary objectiv is to make a full sata boot my first attempt was just copy vendors spl + newer uBoot (2014.10) to a harddisk with oxnas_sata_boot script from warhead.

uBoot is 562 kB big (vendors 120-170Kb)

Stage-1 Bootloader 2015-01.21-21:48:56
Attempting to set PLLA to 800MHz ...
  plla_ctrl0 : 0x0000030A
  plla_ctrl1 : 0x00400000
  plla_ctrl2 : 0x007F0068
  plla_ctrl3 : 0x00000193
PLLA Set

Setup memory, testing
Reading disk 00
  Sector : 0x0000009A
  Hdr len: 0x0008935C
  Hdr CRC: 0x16FD462A
 too big
Reading disk 01
  Sector : 0x0000DF78
  Hdr len: 0x00000000
  Hdr CRC: 0x00000000
 length 0
Reading disk 10
  Sector : 0x0000009A
  Hdr len: 0xA1A2A3A4
  Hdr CRC: 0xB1B2B3B4
 read failed
Reading disk 11
  Sector : 0x0000DF78

So I in my opinon it looks like uBoot 2014.10 is to big to load from sata sectors.

If I boot the vendors uBoot to load kernel from disk -> sata disk won't inital and i don't know why.

So I like either to modify the spl (vendor) to enable fat,ext2 or ext4 uBoot or modify Kref's spl to enable the second disk. An other try would be to shrink down a newer uBoot to get it in disk sector.

But I have no idea how to do one of these things, so I hope someone can help me out here with some ideas :-)