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Diffstat (limited to 'roms/u-boot/board/logicpd/imx6/README')
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diff --git a/roms/u-boot/board/logicpd/imx6/README b/roms/u-boot/board/logicpd/imx6/README new file mode 100644 index 000000000..19f79c573 --- /dev/null +++ b/roms/u-boot/board/logicpd/imx6/README @@ -0,0 +1,83 @@ +U-Boot for LogicPD i.MX6 Development Kit +---------------------------------------- + +This file contains information for the port of U-Boot to the Logic PD Development kit. + +Logic PD has an i.MX6 System On Module (SOM) and a correspondong development +board. SOM has a built-in microSD socket, DDR and NAND flash. The development kit has +an SMSC Ethernet PHY, serial debug port and a variety of peripherals. + +On the intial release, the SOM came with either an i.MX6D or i.MX6Q. + +For more details about Logic PD i.MX6 Development kit, visit: +https://www.logicpd.com/ + +Building U-Boot for Logic PD Development Kit +-------------------------------------------- +To build U-Boot for the Dual and Quad variants: + + make imx6q_logic_defconfig + make u-boot.imx CROSS_COMPILE=arm-linux- + + +Flashing U-Boot into the SD card +-------------------------------- +U-Boot is now building with SPL enabled which means there are two files to +load into the SD card. Make sure the card is formatted with at least two +partitions with the first partition being FAT32. First copy u-boot-dtb.img +to the first partition then burn SPL to the SD card with dd. +The SPL portion is programmed into a certain location for use by the internal +bootROM and it cannot be changed. The following instructions assume the SD +card is located as /dev/sdb. + + cp u-boot-dtb.img /dev/media/logic/boot + sudo dd if=SPL of=/dev/sdb bs=1k seek=1 oflag=sync status=none && sync + + +Flashing U-Boot into NAND +------------------------- +Once in Linux with MTD support for the NAND on /dev/mtd0, program U-Boot with the following: +with: + + kobs-ng init -v -x u-boot-dtb.imx + + +Using Falcon Mode +----------------- +With Falcon Mode enabled, U-Boot can be bypassed by having SPL directly load +the kernel. The device tree, Kernel and boot args must first be configured, +and stored to a file on the micro SD card called 'args' +The kernel uImage is built with LOAD_ADDR=0x12000000 and the device tree is +assummed to be imx6q-logicpd.dtb. + +By default the mmcroot is set to the baseboard. + + # Establish bootargs + run mmcargs + + # Load Linux Kernel uImage + fatload mmc 1 $loadaddr uImage + + # Load Device Tree + run loadfdt + + # Setup the blob that will get passed to the kernel + spl export fdt ${loadaddr} - ${fdt_addr_r} + + # Note the starting and ending address of the updated device tree. + # for this example: + # Loading Device Tree to 1ffdf000, end 1fff038b ... OK + # Notice that 0x1fff038b - 1ffdf000 = 0x1138b + # now Add 1, so the length is 0x1138c. + + fatwrite mmc 1 0x1ffdf000 args 0x1138c + + # Reset the board and it will bypass U-Boot and SPL will directly boot + # the uImage + +To interrupt the boot sequence and force U-Boot to load, hold the 'c' button +while starting. + +Additional Support Documentation can be found at: +https://support.logicpd.com/ + |