topic Re: Linux refresh uboot in i.MX Processors

Linux refresh uboot

songhongliang — Fri, 14 Jul 2023 08:46:07 GMT

yocto imx8dx L5.4

I have a requirement now, my uboot has some bugs, but my device is already in the hands of the customer. I can remotely download files in Linux. Is there any way for me to update the uboot firmware downloaded from Linux and write it back to EMMC without using external devices such as PCs.

Re: Linux refresh uboot

joanxie — Fri, 14 Jul 2023 11:26:17 GMT

你能用中文再描述一下吗？ I can remotely download files in Linux. 你是指从linux下载什么文件？是说下载Images？你的需求是想从远程通过网络写uboot到板子里面的意思吗？

Re: Linux refresh uboot

smithcoba — Thu, 20 Jul 2023 09:38:32 GMT

suppose you are using mmc0 boot0

On the board:

echo 0 > /sys/block/mmcblk0boot0/force_ro
dd if=flash.bin of=/dev/mmc0boot0
echo 1 > /sys/block/mmcblk0boot0/force_ro

Re: Linux refresh uboot

songhongliang — Mon, 24 Jul 2023 01:06:44 GMT

在imx8dx板子上，通过Linux 给自己的uboot重新刷写更新一下，uboot中默认是有预留的一百多M内存，我想把这个内存给到linux用。但是板子已经在消费者手中了。或这有没有其他的方法不用重新刷写uboot就能实现这个功能

Re: Linux refresh uboot

songhongliang — Tue, 25 Jul 2023 02:38:40 GMT

在Linux中板子自己把自己的flash.bin给更新掉

Re: Linux refresh uboot

JudyJeo — Tue, 25 Jul 2023 02:59:02 GMT

那个叫 smithcoba的人不是已经告诉你怎么做了吗。

Re: Linux refresh uboot

songhongliang — Wed, 26 Jul 2023 10:01:07 GMT

No effect, cat/proc/meminfo shows that the total memory has not changed, but using the uuu tool to flash the machine memory has changed. But the equipment has already been shipped

Re: Linux refresh uboot

songhongliang — Wed, 26 Jul 2023 10:01:48 GMT

没有效果，操作完重启内存没有变化

Re: Linux refresh uboot

joanxie — Thu, 27 Jul 2023 08:20:23 GMT

你参考这个文档试试？

“https://community.nxp.com/t5/i-MX-Processors-Knowledge-Base/SWUpdate-OTA-i-MX8MM-EVK-i-MX8QXP-MEK/ta-p/1307416”

Re: Linux refresh uboot

JudyJeo — Thu, 27 Jul 2023 10:55:26 GMT

1. emmc 是几？ emmc0 emmc2 你实际的号码替换

2. uboot 里面看一下现在是从哪个partition boot 的 mmc partconf 2（2 是emmc 的interface 的号码）比方。是不是更新了boot 的那个partition

3. uboot 的log 里面有build的时间。 build 时间变了没有。变了就是更新好了。

Re: Linux refresh uboot

JudyJeo — Fri, 28 Jul 2023 02:24:06 GMT

1. 看一下那个partition 是boot用的

mmc extcsd read /dev/mmcblk0 |grep -A 3 PARTITION_CONFIG

2. 使能其中一个partition

mmc bootpart enable 1 0 /dev/mmcblk0 enable boot1

mmc bootpart enable 2 0 /dev/mmcblk0 enable boot2

mmc bootpart enable 7 0 /dev/mmcblk0 enable user

enable 完了可以用 #1 命令确认一下

3. 写bootloader 去 boot partition

a. boot1

echo 0 > /sys/block/mmcblk0boot0/force_ro

dd if=flash.bin of=/dev/mmcblk0boot0

echo 1 > /sys/block/mmcblk0boot0/force_ro

b. boot2

echo 0 > /sys/block/mmcblk0boot1/force_ro

dd if=flash.bin of=/dev/mmcblk0boot1

echo 1 > /sys/block/mmcblk0boot1/force_ro

c user

dd if=flash.bin of=/dev/mmcblk0 bs=1k seek=32

4. i.MX8X 的两个boot 分区是互相备份的。见文章

https://community.nxp.com/t5/Blog/i-MX8QXP-eMMC-Secondary-Boot/ba-p/1257704

我觉得是smithcoba 的这个笔误写错了 dd if=flash.bin of=/dev/mmc0boot0 应该是 dd if=flash.bin of=/dev/mmcblk0boot0

如果你照着没有改就错了。

Re: Linux refresh uboot

yixinchi — Thu, 24 Aug 2023 10:14:46 GMT

你好，您知道/dev/mmcblk0和/dev/mmcblk1在emmc的地址吗，我可以uboot命令行下将uboot进行在线更新吗

Re: Linux refresh uboot

yixinchi — Fri, 25 Aug 2023 00:24:22 GMT

Unfortunately, like you said the method I did not succeed, I read the IMX_LINUX_USERS_GUIDE.pdf manual before, I tried the mmc partition structure on page 9, and did not find the uboot that I downloaded using uuu, I even rummaged from 0x0 to 0xa00000 and did not find it