LXR uboot/board/freescale/mx6sabreauto/README

   1How to use and build U-Boot on mx6sabreauto
   2-------------------------------------------
   3
   4mx6sabreauto_defconfig target supports mx6q/mx6dl/mx6qp sabreauto variants.
   5
   6In order to build it:
   7
   8$ make mx6sabreauto_defconfig
   9
  10$ make
  11
  12This will generate the SPL and u-boot-dtb.img binaries.
  13
  14- Flash the SPL binary into the SD card:
  15
  16$ sudo dd if=SPL of=/dev/sdX bs=1K seek=1 && sync
  17
  18- Flash the u-boot-dtb.img binary into the SD card:
  19
  20$ sudo dd if=u-boot-dtb.img of=/dev/sdX bs=1K seek=69 && sync
  21
  22Booting via Falcon mode
  23-----------------------
  24
  25Write in mx6sabreauto_defconfig the following define below:
  26
  27CONFIG_SPL_OS_BOOT=y
  28
  29In order to build it:
  30
  31$ make mx6sabreauto_defconfig
  32
  33$ make
  34
  35This will generate the SPL image called SPL and the u-boot-dtb.img.
  36
  37- Flash the SPL image into the SD card:
  38
  39$ sudo dd if=SPL of=/dev/sdb bs=1K seek=1 && sync
  40
  41- Flash the u-boot-dtb.img image into the SD card:
  42
  43$ sudo dd if=u-boot-dtb.img of=/dev/sdb bs=1K seek=69 && sync
  44
  45Create a FAT16 boot partition to store uImage and the dtb file, then copy the files there:
  46
  47$ sudo cp uImage /media/boot
  48
  49$ sudo cp imx6dl-sabreauto.dtb /media/boot
  50
  51Create a partition for root file system and extract it there:
  52
  53$ sudo tar xvf rootfs.tar.gz -C /media/root
  54
  55The SD card must have enough space for raw "args" and "kernel".
  56To configure Falcon mode for the first time, on U-Boot do the following commands:
  57
  58- Load dtb file from boot partition:
  59
  60# load mmc 0:1 ${fdt_addr} imx6dl-sabreauto.dtb
  61
  62- Load kernel image from boot partition:
  63
  64# load mmc 0:1 ${loadaddr} uImage
  65
  66- Write kernel at 2MB offset:
  67
  68# mmc write ${loadaddr} 0x1000 0x4000
  69
  70- Setup kernel bootargs:
  71
  72# setenv bootargs "console=ttymxc3,115200 root=/dev/mmcblk0p1 rootfstype=ext4 rootwait quiet rw"
  73
  74- Prepare args:
  75
  76# spl export fdt ${loadaddr} - ${fdt_addr}
  77
  78- Write args 1MB data (0x800 sectors) to 1MB offset (0x800 sectors)
  79
  80# mmc write 18000000 0x800 0x800
  81
  82- Restart the board and then SPL binary will launch the kernel directly.
  83