u-boot

mirror of https://github.com/AsahiLinux/u-boot synced 2024-12-03 01:50:25 +00:00

History

Fabio Estevam bcc70bc863 mx6ul_14x14_evk: Fix SPL boot hang Currently the following SPL hang is observed: U-Boot SPL 2020.01-rc5-00079-g797eee36a1 (Jan 06 2020 - 11:24:09 -0300) Trying to boot from MMC1 Card did not respond to voltage select! spl: mmc init failed with error: -95 SPL: failed to boot from all boot devices ### ERROR ### Please RESET the board ### Fix it by moving the eSDHC2 initialization to SPL. While at it, since this board uses DM_MMC all the esdhc board code can be removed to make the code simpler. Signed-off-by: Fabio Estevam <festevam@gmail.com>		2020-01-14 22:23:19 +01:00
..
Kconfig	mx6: remove SYS_SOC from board Kconfig	2015-09-13 10:37:29 +02:00
MAINTAINERS	MAINTAINERS: Update Peng Fan's email address	2016-03-02 14:48:52 +01:00
Makefile	SPDX: Convert all of our single license tags to Linux Kernel style	2018-05-07 09:34:12 -04:00
mx6ul_14x14_evk.c	mx6ul_14x14_evk: Fix SPL boot hang	2020-01-14 22:23:19 +01:00
README	mx6ulevk: Include SDP boot instructions in README	2019-10-08 16:36:37 +02:00

README

How to use U-Boot on Freescale MX6UL 14x14 EVK
-----------------------------------------------

- Build U-Boot for MX6UL 14x14 EVK:

$ make mrproper
$ make mx6ul_14x14_evk_defconfig
$ make

This will generate the SPL image called SPL and the u-boot.img.

1. Booting via SDCard
---------------------

- Flash the SPL image into the micro SD card:

sudo dd if=SPL of=/dev/mmcblk0 bs=1k seek=1; sync

- Flash the u-boot.img image into the micro SD card:

sudo dd if=u-boot.img of=/dev/mmcblk0 bs=1k seek=69; sync

- Jumper settings:

SW601: 0 0 1 0
Sw602: 1 0

where 0 means bottom position and 1 means top position (from the
switch label numbers reference).

- Connect the USB cable between the EVK and the PC for the console.
(The USB console connector is the one close the push buttons)

- Insert the micro SD card in the board, power it up and U-Boot messages should
come up.

2. Booting via Serial Download Protocol (SDP)
---------------------------------------------

The mx6ulevk board can boot from USB OTG port using the SDP, target will
enter in SDP mode in case an SD Card is not connect or boot switches are
set as below:

Sw602: 0 1
SW601: x x x x

The following tools can be used to boot via SDP, for both tools you must
connect an USB cable in USB OTG port.

- Method 1: Universal Update Utility (uuu)

The UUU binary can be downloaded in release tab from link below:
https://github.com/NXPmicro/mfgtools

The following script should be created to boot SPL + u-boot-dtb.img binaries:

  $ cat uuu_script
    uuu_version 1.1.4

    SDP: boot -f SPL
    SDPU: write -f u-boot-dtb.img -addr 0x877fffc0
    SDPU: jump -addr 0x877fffc0
    SDPU: done

Please note that the address above is calculated based on SYS_TEXT_BASE address:

0x877fffc0 = 0x87800000 (SYS_TEXT_BASE) - 0x40 (U-Boot proper Header size)

Power on the target and run the following command from U-Boot root directory:

  $ sudo ./uuu uuu_script

- Method 2: imx usb loader tool (imx_usb):

The imx_usb_loader tool can be downloaded in link below:
https://github.com/boundarydevices/imx_usb_loader

Build the source code and run the following commands from U-Boot root
directory:

  $ sudo ./imx_usb SPL
  $ sudo ./imx_usb u-boot-dtb.img