i.MX ProcessorsのトピックRe: i.MX8MQ U-Boot cannot enter fastboot mode

i.MX8MQ U-Boot cannot enter fastboot mode

eric_lee1 — Sun, 27 Oct 2019 08:29:46 GMT

Hi,

I have a custom i.MX8MQ board running Android 9.0. When I run "# adb reboot bootloader" from a adb shell

The board reboots and stuck at U-Boot "Fastboot: Got bootloader commands!" and stop forever. When I type "# fastboot 0" from u-boot command prompt, it stucks forever too. I need to use ctrl-c to exit u-boot.

I have an i.MX8MQ EVK at hand and repeat everything again. I got exactly the same result. The EVK runs Android 8.x and u-boot version should 2017.03. However, the results are the same.

My question now is: How to enter u-boot fastboot mode on i.MX8MQ? We need to oem unlock from fastboot mode. Without this, we cannot unlock device from Android. Please help.

-Eric

Re: i.MX8MQ U-Boot cannot enter fastboot mode

eric_lee1 — Mon, 28 Oct 2019 10:20:55 GMT

Could anyone help please?

-Eric

Re: i.MX8MQ U-Boot cannot enter fastboot mode

diegoadrian — Mon, 28 Oct 2019 20:10:16 GMT

Hello,

If you type ./fastboot.exe devices in your windows terminal, are you getting any output? This is at the time you rebooted into bootloader mode.

Best regards,

Diego.

Re: i.MX8MQ U-Boot cannot enter fastboot mode

eric_lee1 — Tue, 29 Oct 2019 02:10:42 GMT

Hi Diego,

Below is the results that runing on Windows 10.

When boot into Android, I can see "LeMobile Android Device" showing on Windows device manager.

When I run # adb reboot bootloader

The device debug console stop at "Fastboot: Got bootloader commands!". At Windows side, I can hear the USB re-connected sound and the device manager only showing "USB download gadget". When type fastboot at SDK Platform Tools,

D:\platform-tools>fastboot devices

It shows nothing.

And when I type some fastboot commands, it stops forever

D:/platform-tools>fastboot oem unlock

< waiting for any devices >

This results are same as running on Linux PC. My u-boot is from NXP official release u-boot release imx_v2018.03_4.14.78_1.0.0_ga

Also, we bought an i.MX8MQ official development board and the situations are the same. The default firmware in eMMC of EVK hasn't been changed. We use it for verification purposes only.

-Eric

Re: i.MX8MQ U-Boot cannot enter fastboot mode

eric_lee1 — Wed, 30 Oct 2019 14:24:48 GMT

I am wondering if anyone in NXP seriously looking at this problems.

-Eric

Re: i.MX8MQ U-Boot cannot enter fastboot mode

diegoadrian — Wed, 30 Oct 2019 17:12:47 GMT

Hello,

Please perform the following steps.

If your computer does not recognize once you are inside the bootloader mode. What you need to do is update the USB driver. To update the driver, follow the below steps.

First, open your device manager and locate the Universal Serial Bus devices -> USB download gadget.
Select the “Browse my computer for driver software” option.
Select the “Let me pick from a list of available drivers on my computer” option.
Select the ADB Device Model.
And accept to install the driver.

After that, your computer should recognize the board being into Bootloader mode.

Hope this could help you.

Best regards,

Diego.

Re: i.MX8MQ U-Boot cannot enter fastboot mode

eric_lee1 — Sat, 02 Nov 2019 08:28:47 GMT

Dear Diego,

Many thanks. It turns out that Windows uses the wrong driver. Use your suggestions do help. Now I have no problems in using fastboot.

Anyway that I can do this under Linux PC? I created a /etc/udev/rules.d/51-android.rules and add

SUBSYSTEM=="usb", ATTR{idVendor}=="18d1", MODE="0666", GROUP="plugdev"

Change the permission to a+x, but it doesn't work either.

-Eric

Re: i.MX8MQ U-Boot cannot enter fastboot mode

diegoadrian — Mon, 04 Nov 2019 15:18:19 GMT

Hello,

Try adding the following to the same file.

SUBSYSTEM=="usb", ATTR{idVendor}=="18d1", ATTR{idProduct}=="d002", MODE="0660",
GROUP="plugdev", SYMLINK+="android%n"

After adding that, reboot your computer. Whit ADB should work on your Linux computer without any problem.

Best regards,

Diego.

Re: i.MX8MQ U-Boot cannot enter fastboot mode

coindu — Mon, 18 Nov 2019 06:16:16 GMT

Hello :

I want to know where to download the device driver for windows 10.

Re: i.MX8MQ U-Boot cannot enter fastboot mode

851815112 — Fri, 29 Nov 2019 07:35:19 GMT

Hello everyone,

I have a custom i.MX8MM board running Android 9.0，I encountered the same problem. I have follow the operation with @Diego Adrian Cuevas, and can see the adb device in windows device manager.

But, the terminal still display "Fastboot: Got bootloader commands!" and stop forever. I can not type any char into the IMX8MM. I need to use ctrl-c to exit u-boot

If i input string"fastboot reboot " , it return "wait for device":

Wait for your repeat! Thank you.

Best regards,

Alan

Re: i.MX8MQ U-Boot cannot enter fastboot mode

coindu — Fri, 29 Nov 2019 08:25:16 GMT

https://community.nxp.com/thread/504356