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2018.03+fslc
u-boot-brain/board/freescale/mx6sabresd
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Masahiro Yamada b08c8c4870 libfdt: move headers to <linux/libfdt.h> and <linux/libfdt_env.h> 
Thomas reported U-Boot failed to build host tools if libfdt-devel
package is installed because tools include libfdt headers from
/usr/include/ instead of using internal ones.

This commit moves the header code:
  include/libfdt.h         -> include/linux/libfdt.h
  include/libfdt_env.h     -> include/linux/libfdt_env.h

and replaces include directives:
  #include <libfdt.h>      -> #include <linux/libfdt.h>
  #include <libfdt_env.h>  -> #include <linux/libfdt_env.h>

Reported-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2018-03-05 10:16:28 -05:00
..
Kconfig mx6: remove SYS_SOC from board Kconfig 2015-09-13 10:37:29 +02:00
MAINTAINERS mx6sabresd: Update the config file 2017-05-31 10:42:18 +02:00
Makefile board: arm: convert makefiles to Kbuild style 2013-11-01 11:42:12 -04:00
mx6sabresd.c libfdt: move headers to <linux/libfdt.h> and <linux/libfdt_env.h> 2018-03-05 10:16:28 -05:00
README mx6sabresd: Update to SPL only mode 2017-05-31 10:42:27 +02:00

README 

How to use and build U-Boot on mx6sabresd
-----------------------------------------

The following methods can be used for booting mx6sabresd boards:

1. Booting from SD card

2. Booting from eMMC

3. Booting via Falcon mode (SPL launches the kernel directly)


1. Booting from SD card via SPL
-------------------------------

mx6sabresd_defconfig target supports mx6q/mx6dl/mx6qp sabresd variants.

In order to build it:

$ make mx6sabresd_defconfig

$ make

This will generate the SPL and u-boot.img binaries.

- Flash the SPL binary into the SD card:

$ sudo dd if=SPL of=/dev/sdX bs=1K seek=1 && sync

- Flash the u-boot.img binary into the SD card:

$ sudo dd if=u-boot.img of=/dev/sdX bs=1K seek=69 && sync


2. Booting from eMMC
--------------------

$ make mx6sabresd_defconfig

$ make

This will generate the SPL and u-boot.img binaries.

- Boot first from SD card as shown in the previous section

In U-boot change the eMMC partition config:

=> mmc partconf 2 1 0 0

Mount the eMMC in the host PC:

=> ums 0 mmc 2

- Flash SPL and u-boot.img binaries into the eMMC:

$ sudo dd if=SPL of=/dev/sdX bs=1K seek=1 && sync
$ sudo dd if=u-boot.img of=/dev/sdX bs=1K seek=69 && sync

Set SW6 to eMMC 8-bit boot: 11010110


3. Booting via Falcon mode
--------------------------

$ make mx6sabresd_defconfig
$ make

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

- Flash the SPL image into the SD card:

$ sudo dd if=SPL of=/dev/sdX bs=1K seek=1 oflag=sync status=none && sync

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

$ sudo dd if=u-boot.img of=/dev/sdX bs=1K seek=69 oflag=sync status=none && sync

Create a partition for root file system and extract it there:

$ sudo tar xvf rootfs.tar.gz -C /media/root

The SD card must have enough space for raw "args" and "kernel".
To configure Falcon mode for the first time, on U-Boot do the following commands:

- Setup the IP server:

# setenv serverip <server_ip_address>

- Download dtb file:

# dhcp ${fdt_addr} imx6q-sabresd.dtb

- Download kernel image:

# dhcp ${loadaddr} uImage

- Write kernel at 2MB offset:

# mmc write ${loadaddr} 0x1000 0x4000

- Setup kernel bootargs:

# setenv bootargs "console=ttymxc0,115200 root=/dev/mmcblk1p1 rootfstype=ext4 rootwait quiet rw"

- Prepare args:

# spl export fdt ${loadaddr} - ${fdt_addr}

- Write args 1MB data (0x800 sectors) to 1MB offset (0x800 sectors)

# mmc write 18000000 0x800 0x800

- Press KEY_VOL_UP key, power up the board and then SPL binary will
launch the kernel directly.