AM6442: Sitara "Configure USB in Kernel" videos - what replaced DWC3 in the AM64x Linux kernel?

Jim Mrowca

Part Number: AM6442

Tool/software:

I was reviewing the Sitara USB videos and I saw (31) Bin Liu's Profile - Bin Liu - TI E2E support forums 's video USB System Design in Sitara Devices Using Linux: Configure DWC3 in Linux Kernel | Video | TI.com

I was trying to find what changed/replaced in the DWC3 content of the video if I am using AM64x ?

(I suspect AM64X does not use DWC3 as I saw (31) Andreas Dannenberg's Profile - Andreas Dannenberg - TI E2E support forums 's email on the linux archive post https://lore.kernel.org/buildroot/14c91760-3a58-45ae-a4a0-7cfd6960e8fa@smile.fr/T/ )

There is a bit of a disconnect from the 2018 videos for the newer Sitara lines -- unless the replacement is to have the Linux academies do that?

4 months ago

0 Bin Liu 4 months ago

TI__Guru*** 141566 points

Hi Jim,

You are correct, AM64x uses CDNS3 USB controller, not DWC3. AM64x devices do not exist back in 2018 when the video was created.

Our plan is to add the AM64x CDNS3 details in the AM64x Academy. At this moment please check the kernel defconfig for AM64x.

0 Jim Mrowca 4 months ago in reply to Bin Liu

Expert 1808 points

Bin :

I wanted to check if I am looking at the wrong tree in git for cdns3 or not -- is this attachment right for the AM64x SDK 9.2 or where??

Also where specifically is the kernel defconfig on AM64x?

thanks

Jim

0 Bin Liu 4 months ago in reply to Jim Mrowca

TI__Guru*** 141566 points

Hi Jim,

It seems you missed the attachment?

In AM62x SDK9.2, the following command generates the kernel defconfig:

$ make ARCH=... CROSS_COMPILE=... defconfig ti_arm64_prune.config

0 Jim Mrowca 4 months ago in reply to Bin Liu

Expert 1808 points

Bin: similar line for AM64X SDK v9.2 - true?

0 Bin Liu 4 months ago in reply to Jim Mrowca

TI__Guru*** 141566 points

Correct, all the TI K3 devices use the same kernel defconfig.

0 Bin Liu 4 months ago in reply to Bin Liu

TI__Guru*** 141566 points

Bin Liu said:
In AM62x SDK9.2, the following command generates the kernel defconfig:

This is a typo, I meant to say "AM64x"...

0 Jim Mrowca 4 months ago in reply to Jim Mrowca

Expert 1808 points

Bin: I was trying to look for a repository that has the CDNS3 in AM64x under https://git.ti.com/cgit/ti-linux-kernel/ti-linux-kernel/ - do you know where?

JIm

+1 Bin Liu 4 months ago in reply to Jim Mrowca

TI__Guru*** 141566 points

drivers/usb/cdns3/.

0 Jim Mrowca 4 months ago in reply to Bin Liu

Expert 1808 points

Thanks for the pointer Bin. I have "git clone -b linux-6.1.y --single-branch" that repository & if I have questions on CDNS3 use in Linux I''ll send separately. Probably is a good move to use that Cadence 3rd party USB 3 IP in AM64x

later

Jim

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AM6442: Sitara "Configure USB in Kernel" videos - what replaced DWC3 in the AM64x Linux kernel?