u-boot

mirror of https://github.com/AsahiLinux/u-boot synced 2024-11-25 06:00:43 +00:00

History

Josua Mayer bb6e89048c board: solidrun: clearfog: fix serdes 1 / eth2 speed for clearfog gtr Clearfog GTR connects eth2 / serdes 1 to a 2.5Gbps capable ethernet switch port. Linux already configures a fixed-link at speed 2500 from device-tree. Upgrade serdes 1 rate to 3.125Gbps to support a 2.5Gbps link. Additionally add comments documenting each serdes' function of clearfog gtr, which are shared with clearfog pro. Signed-off-by: Josua Mayer <josua@solid-run.com>		2024-01-22 12:47:45 +01:00
..
clearfog.c	board: solidrun: clearfog: fix serdes 1 / eth2 speed for clearfog gtr	2024-01-22 12:47:45 +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.