mirror of https://github.com/hak5/openwrt.git
124 lines
4.5 KiB
Diff
124 lines
4.5 KiB
Diff
From 42cc2cffb6d550fbb21dad033d2564d4da571015 Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Petr=20=C5=A0tetiar?= <ynezz@true.cz>
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Date: Sat, 1 Dec 2018 12:46:37 +0100
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Subject: [PATCH] imx6: apalis: Make the boot process more generic
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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I'm preparing support for Apalis imx6 boards in OpenWrt and I've ended
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up with quite huge patchset against upstream U-Boot 2018.03, so I'm
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trying to propose more generic way of boot process handling.
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In OpenWrt we usually have kernel, dtbs and U-Boot boot script in boot
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partition with ext4fs, so for some use cases it would be handy to be
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able to replace some of the files in the boot partion, that's why I've
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added write support to the ext4.
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I've added `set_blkcnt` environment variable which is needed for every
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`mmc write` command as we need to always specify size in block count.
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This is copy&pasted from official Toradex's flashing scripts, so all the
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credits for this work belongs to them.
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Currently the rootfs location is passed via mmcblk number and the
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problem with this approach is that the mmcblk number for the boot device
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changes depending on the kernel version and imx6 SoC type. In order to
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avoid such issues, use the UUID method to specify the rootfs location.
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I've added new boot sequence, where we first try to load and run boot
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script defined in the new `script` variable, so the boot process could
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be more generic and overridden by the distro. When the boot script isn't
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loaded, it will use the previous boot sequence so it should be backward
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compatible.
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For the recovery purposes and better end user experience I've added boot
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from SDP as the last boot command if every other boot option fails. I
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plan to use SDP as official flashing/recovery procedure in OpenWrt for
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Apalis imx6 boards.
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I've copy&pasted almost everything from the `f086812a mx6sxsabresd: Use
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PARTUUID to specify the rootfs location` commit, so credits for the rest
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of this patch belongs to Fabio.
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Cc: Stefan Agner <stefan.agner@toradex.com>
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Cc: Max Krummenacher <max.krummenacher@toradex.com>
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Signed-off-by: Petr Štetiar <ynezz@true.cz>
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---
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configs/apalis_imx6_defconfig | 2 ++
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include/configs/apalis_imx6.h | 26 +++++++++++++++++++++-----
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2 files changed, 23 insertions(+), 5 deletions(-)
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--- a/configs/apalis_imx6_defconfig
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+++ b/configs/apalis_imx6_defconfig
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@@ -40,6 +40,7 @@ CONFIG_CMD_DFU=y
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CONFIG_CMD_GPIO=y
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CONFIG_CMD_I2C=y
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CONFIG_CMD_MMC=y
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+CONFIG_CMD_PART=y
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CONFIG_CMD_USB=y
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CONFIG_CMD_USB_SDP=y
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CONFIG_CMD_USB_MASS_STORAGE=y
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@@ -49,6 +50,7 @@ CONFIG_CMD_PING=y
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CONFIG_CMD_BMP=y
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CONFIG_CMD_CACHE=y
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CONFIG_CMD_EXT4=y
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+CONFIG_CMD_EXT4_WRITE=y
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CONFIG_CMD_FAT=y
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CONFIG_CMD_FS_GENERIC=y
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CONFIG_ENV_IS_IN_MMC=y
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--- a/include/configs/apalis_imx6.h
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+++ b/include/configs/apalis_imx6.h
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@@ -138,9 +138,9 @@
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"imx6q-colibri-cam-eval-v3.dtb fat 0 1"
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#define EMMC_BOOTCMD \
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- "emmcargs=ip=off root=/dev/mmcblk0p2 rw,noatime rootfstype=ext3 " \
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+ "emmcargs=ip=off root=PARTUUID=${uuid} rw,noatime rootfstype=ext3 " \
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"rootwait\0" \
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- "emmcboot=run setup; " \
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+ "emmcboot=run setup; run finduuid;" \
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"setenv bootargs ${defargs} ${emmcargs} ${setupargs} " \
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"${vidargs}; echo Booting from internal eMMC chip...; " \
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"run emmcdtbload; load mmc 0:1 ${kernel_addr_r} " \
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@@ -197,10 +197,17 @@
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#define FDT_FILE "imx6q-apalis_v1_0-eval.dtb"
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#endif
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#define CONFIG_EXTRA_ENV_SETTINGS \
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- "bootcmd=run emmcboot ; echo ; echo emmcboot failed ; " \
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+ "script=boot.scr\0" \
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+ "finduuid=part uuid mmc 0:2 uuid\0" \
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+ "loadbootscript=" \
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+ "load mmc 0:1 ${loadaddr} ${script};\0" \
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+ "bootscript=echo Running bootscript from mmc ...; " \
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+ "source\0" \
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+ "bootcmd_default=run emmcboot ; echo ; echo emmcboot failed ; " \
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"run nfsboot ; echo ; echo nfsboot failed ; " \
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"usb start ;" \
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- "setenv stdout serial,vga ; setenv stdin serial,usbkbd\0" \
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+ "setenv stdout serial,vga ; setenv stdin serial,usbkbd;" \
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+ "sdp 0\0" \
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"boot_file=uImage\0" \
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"console=ttymxc0\0" \
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"defargs=enable_wait_mode=off vmalloc=400M\0" \
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@@ -228,7 +235,16 @@
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"vidargs=mxc_hdmi.only_cea=1 " \
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"video=mxcfb0:dev=hdmi,1920x1080M@60,if=RGB24 " \
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"video=mxcfb1:off video=mxcfb2:off video=mxcfb3:off " \
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- "fbmem=32M\0 "
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+ "fbmem=32M\0 " \
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+ "set_blkcnt=setexpr blkcnt ${filesize} + 0x1ff && setexpr blkcnt ${blkcnt} / 0x200\0"
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+
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+#define CONFIG_BOOTCOMMAND \
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+ "mmc dev 0;" \
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+ "if run loadbootscript; then " \
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+ "run bootscript; " \
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+ "else " \
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+ "run bootcmd_default; " \
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+ "fi; "
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/* Miscellaneous configurable options */
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#undef CONFIG_SYS_CBSIZE
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--
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1.9.1
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