making boot mode for IMX6D board

[srinivasaporam]

Hi,

We  have got a customized IMX6D board based on IMX6 reference design which has come just after assembly.  We have made boot configuration(register maps) as per the reference design circuit/schematics and only provided two switches (boot_mode_1  & boot_mode_0).

based on boot_mode_1 and boot_mode_0 positions , our modes are defined like as below:

1. boot_mode_1=0 and boot_mode_0=1 , then serial downloader/USB-OTG

2.boot_mode_1=1 and boot_mode_0=0 , then SD Card boot

like that 2-4  more options are there, but we are mainly interested in usb/otg or SD card mode.

Now, my query is since the board has come just after assembly, will it work if i set only boot_mode_1 & boot_mode_0 in respective positions or do i need to burn efuses.

If i need to burn the efuses and then only after setting boot-mode_1 & boot_mode_0 switches will make me to land to correct boot device, then how to burn efuses. What is the simplest tool to do it. any help document available???

Please help...

[Yuri]

Hello,

   The serial boot loader mode is working (for BOOT_MODE = 11) in any case.

But please be familiar with SD / MMC Manufacture mode, that may be called

before applying  serial (USB) boot. Please look at section 8.11 (SD/MMC Manufacture

Mode) of the  IMX6SDLRM (Rev. 2, 04/2015) for details. It is supported in i.MX6SDL

and i.MX6SL. However, it is not available on i.MX6DQ.

  As for fuse burn  please look at the following :

1.

“Q&A: How to program i.MX6 eFUSE?”

https://community.freescale.com/docs/DOC-95458

2.

  Section 4 (Blow SRK_HASH fuse) of

“Mx6 HAB (High Assurance Boot)”

https://community.freescale.com/docs/DOC-96451

3.

In MFG script file ucl2.xml, you can see the below commands to write OTP (as an example) :

    <CMD state="Updater" type="push" body="$ ls -la /sys/fsl_otp ">Showing HW_OCOTP fuse bank</CMD>

    <CMD state="Updater" type="push" body="$ echo 0x00006200 > /sys/fsl_otp/HW_OCOTP_GP1">

             write 0x00006200 to HW_OCOTP_GP1 fuse bank

   </CMD>

    <CMD state="Updater" type="push" body="$ cat /sys/fsl_otp/HW_OCOTP_GP1">Read value from HW_OCOTP_GP1 fuse bank</CMD>

Have a great day,
Yuri

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[srinivasaporam]

And also to efuses such that boot mode device is SD3

[Yuri]

As for "boot mode device is SD3" - please create SR,

and attach there schematic of SD part.

Regards,

Yuri.