mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-06 21:24:29 +00:00
49dae65589
Freescale Semiconductor, Inc. was merged into NXP Semiconductors in 2015. Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
132 lines
2.9 KiB
ReStructuredText
132 lines
2.9 KiB
ReStructuredText
.. SPDX-License-Identifier: GPL-2.0+
|
|
|
|
mx6sabresd
|
|
==========
|
|
|
|
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:
|
|
|
|
.. code-block:: bash
|
|
|
|
$ make mx6sabresd_defconfig
|
|
$ make
|
|
|
|
This will generate the SPL and u-boot-dtb.img binaries.
|
|
|
|
- Flash the SPL binary into the SD card:
|
|
|
|
.. code-block:: bash
|
|
|
|
$ sudo dd if=SPL of=/dev/sdX bs=1K seek=1 conv=notrunc && sync
|
|
|
|
- Flash the u-boot-dtb.img binary into the SD card:
|
|
|
|
.. code-block:: bash
|
|
|
|
$ sudo dd if=u-boot-dtb.img of=/dev/sdX bs=1K seek=69 conv=notrunc && sync
|
|
|
|
2. Booting from eMMC
|
|
--------------------
|
|
|
|
.. code-block:: bash
|
|
|
|
$ make mx6sabresd_defconfig
|
|
$ make
|
|
|
|
This will generate the SPL and u-boot-dtb.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-dtb.img binaries into the eMMC:
|
|
|
|
.. code-block:: bash
|
|
|
|
$ sudo dd if=SPL of=/dev/sdX bs=1K seek=1 conv=notrunc && sync
|
|
$ sudo dd if=u-boot-dtb.img of=/dev/sdX bs=1K seek=69 conv=notrunc && sync
|
|
|
|
Set SW6 to eMMC 8-bit boot: 11010110
|
|
|
|
3. Booting via Falcon mode
|
|
--------------------------
|
|
|
|
.. code-block:: bash
|
|
|
|
$ make mx6sabresd_defconfig
|
|
$ make
|
|
|
|
This will generate the SPL image called SPL and the u-boot-dtb.img.
|
|
|
|
- Flash the SPL image into the SD card
|
|
|
|
.. code-block:: bash
|
|
|
|
$ sudo dd if=SPL of=/dev/sdX bs=1K seek=1 oflag=sync status=none conv=notrunc && sync
|
|
|
|
- Flash the u-boot-dtb.img image into the SD card
|
|
|
|
.. code-block:: bash
|
|
|
|
$ sudo dd if=u-boot-dtb.img of=/dev/sdX bs=1K seek=69 oflag=sync status=none conv=notrunc && sync
|
|
|
|
Create a partition for root file system and extract it there
|
|
|
|
.. code-block:: bash
|
|
|
|
$ 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.
|