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ARM: imx6q_logic: Enable Falcon Mode and fatwrite

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This patch enables Falcon Mode by default and updates the README
file to show instructions on how to run from the micro SD card
or eMMC.  This patch also enables fatwrite to help assist with
writing the 'args' to the microSD card.

Signed-off-by: Adam Ford <aford173@gmail.com>
This commit is contained in:
Adam Ford 2018-12-28 10:24:15 -06:00 committed by Stefano Babic
parent 13baee30d3
commit 6d69e53511
2 changed files with 49 additions and 1 deletions
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48
board/logicpd/imx6/README
View File

@ -22,8 +22,17 @@ To build U-Boot for the Dual and Quad variants:
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
See README.imximage for details on booting from SD
Flashing U-Boot into NAND
-------------------------
@ -32,6 +41,43 @@ 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/

2
configs/imx6q_logic_defconfig
View File

@ -23,6 +23,7 @@ CONFIG_SPL_SEPARATE_BSS=y
CONFIG_SPL_DMA_SUPPORT=y
CONFIG_SPL_I2C_SUPPORT=y
CONFIG_SPL_NAND_SUPPORT=y
CONFIG_SPL_OS_BOOT=y
CONFIG_SPL_PAYLOAD="u-boot.img"
CONFIG_SPL_USB_HOST_SUPPORT=y
CONFIG_SPL_USB_GADGET=y
@ -78,3 +79,4 @@ CONFIG_USB_GADGET_VENDOR_NUM=0x0525
CONFIG_USB_GADGET_PRODUCT_NUM=0xa4a5
CONFIG_CI_UDC=y
CONFIG_USB_GADGET_DOWNLOAD=y
CONFIG_FAT_WRITE=y