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U-Boot for the Congatec QMX6 boards
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This file contains information for the port of U-Boot to the Congatec
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QMX6 boards.
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1. Building U-boot
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- Build U-boot for Congatec QMX6 boards:
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$ make mrproper
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$ make cgtqmx6eval_defconfig
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$ make
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This will generate the following binaries:
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- SPL
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- u-boot.img
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2. Flashing U-boot in the SPI NOR
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---------------------------------
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Copy SPL and u-boot.img to the exported TFTP directory of the
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host PC (/tftpboot , for example).
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=> sf probe
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=> tftp 0x12000000 SPL
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=> sf erase 0x0 0x10000
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=> sf write 0x12000000 0x400 0x100
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=> tftp 0x12000000 u-boot.img
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=> sf erase 0x10000 0x70000
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=> sf write 0x12000000 0x10000 0x70000
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Reboot the board and the new U-boot should come up.
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3. Booting from the SD card
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---------------------------
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- Flash the SPL image into the SD card:
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sudo dd if=SPL of=/dev/mmcblk0 bs=1k seek=1; sync
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- Flash the u-boot.img image into the SD card:
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sudo dd if=u-boot.img of=/dev/mmcblk0 bs=1k seek=69; sync
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- Insert the SD card into the big slot.
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The boot medium of Congatec QMX6 boards is the SPI NOR flash, so boot
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the board from SPI first.
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It is also possible to boot from the SD card slot by using the 'bmode'
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command:
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=> bmode esdhc4
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And then the U-boot from the big slot will boot.
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Note: If the "bmode" command is not available from your pre-installed U-boot,
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these instruction will produce the same effect:
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=> mw.l 0x20d8040 0x3850
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=> mw.l 0x020d8044 0x10000000
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=> reset
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