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Forum Topic - MMC util to read extcsd from emmc devices: (4 Items)

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janardhan reddy(deleted)

03/28/2019 7:19 AM

post119619

MMC util to read extcsd from emmc devices

HI All,


I want read the extcsd register values to know about much info about emmc.

In linux we have MMC util to read the information like csd cid and extcsd and other information.

Is there any utility developed for QNX to read all the details about emmc device.

Can any one share the source code or utility to read it.

any help will be great for me...

Thanks in advance

Thanks & Regards
Janardhan Reddy

Albrecht Uhlmann

Re: MMC util to read extcsd from emmc devices

Albrecht Uhlmann

03/29/2019 8:16 AM

post119623

Re: MMC util to read extcsd from emmc devices

The SD/MMC drivers usually come in source form in the various BSPs. Maybe you can look for some special devctl calls 
that would retrieve this information.

Regards,
Al

Sriya Pradhan(deleted)

Re: MMC util to read extcsd from emmc devices

Sriya Pradhan(deleted)

06/11/2020 3:41 AM

post120757

Re: MMC util to read extcsd from emmc devices

Hi, did you get any answer to what you had asked ? Using devb-sdmmc-* , could you read the emmc  devices?

Albrecht Uhlmann

06/11/2020 8:14 AM

post120759

Re: MMC util to read extcsd from emmc devices

Hi, I did a quick scan of the dcmd_*.h header files, but I didn't come across a device control command that would 
retrieve this information.
$QNX_TARGET/usr/include/mmc contains a header file with some structures, but I think this is what the devb-sdmmc uses 
internally.

-Al

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