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u-boot/board/solidrun/clearfog
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Josua Mayer d09f199097 board: solidrun: clearfog: enable ddr odt0 on write for both chip-select 
Enabling ODT is required to suppress reflection of the data signal on
DDR write operation. SolidRun Armada 388 SoM only connects M_ODT[0] even
when both chip-select are used.

Enable ODT[0] for both chip-select during write only.

Original work by Baruch Siach [1] and Chris Packham [2].

[1] aba763a611
[2] dbaf09590d

Signed-off-by: Josua Mayer <josua@solid-run.com>
Reviewed-by: Stefan Roese <sr@denx.de>
2025-01-28 09:08:44 +01:00
..
clearfog.c board: solidrun: clearfog: enable ddr odt0 on write for both chip-select 2025-01-28 09:08:44 +01:00
Kconfig arm: mvebu: clearfog gtr: add config option to select serdes0 interface 2024-01-22 12:47:45 +01:00
MAINTAINERS MAINTAINERS: Fix path typos and similar 2023-07-25 12:44:47 -04:00
Makefile SPDX: Convert all of our single license tags to Linux Kernel style 2018-05-07 09:34:12 -04:00
README Makefile: Rename u-boot-spl.kwb to u-boot-with-spl.kwb 2022-11-07 07:17:55 +01:00

README 

Update from original Marvell U-Boot to mainline U-Boot:
-------------------------------------------------------

Generate the U-Boot image with these commands:

$ make clearfog_defconfig
$ make

The resulting image including the SPL binary with the
full DDR setup is "u-boot-with-spl.kwb".

Now all you need to do is copy this image on a SD card.
For example with this command:

$ sudo dd if=u-boot-with-spl.kwb of=/dev/sdX bs=512 seek=1

Please use the correct device node for your setup instead
of "/dev/sdX" here!

Install U-Boot on eMMC:
-----------------------

To make SPL load the main U-Boot image from the eMMC boot partition enable
eMMC boot acknowledgement and boot partition with the following U-Boot
command:

  mmc partconf 0 1 1 0

Install U-Boot on eMMC boot partition from Linux running on Clearfog:

  echo 0 > /sys/block/mmcblk0boot0/force_ro
  dd if=u-boot-with-spl.kwb of=/dev/mmcblk0boot0

Note that the SD card is not accessible when the Clearfog SOM has eMMC.
Consider initial boot from UART (see below).

Install U-Boot on SATA:
-----------------------

When loading the main U-Boot image from raw SATA sector, set
CONFIG_SPL_SATA_RAW_U_BOOT_SECTOR to 0x141.

Boot selection:
---------------

Before powering up the board, boot selection should be done via the SW1 dip
switch (0: OFF, 1: ON):

 - SPI:     00010
 - SD/eMMC: 00111
 - M.2 SSD: 11100
 - UART:    01001 [1]

[1]: According to SolidRun's manual, 11110 should be used for UART booting on
     the ClearFog 'Pro' variant.
     However, this doesn't work (anymore) at least on Rev. 2.1 (but '01001' as
     mentionend for the 'Base' variant does).

Boot from UART:
---------------

Connect the on-board micro-USB (CF Pro: CON11, CF Base: CON5)
to your host.

Set the SW1 DIP switches to UART boot (see above).

Run the following command to initiate U-Boot download:

  ./tools/kwboot -b u-boot-with-spl.kwb /dev/ttyUSBX

Use the correct UART device node for /dev/ttyUSBX.

When download finishes start your favorite terminal emulator
on /dev/ttyUSBX.