66AK2G12: 66AK2G12: u-boot PCIe support

Tom Chen

Part Number: 66AK2G12

Hello,

We currently have a design using 66AK2G12 and we need to enable PCIe in u-boot. It seems that K2G PCIe is not supported in u-boot. I searched online and someone else already asked similar questions here many years ago:

https://e2e.ti.com/support/processors-group/processors/f/processors-forum/589561/linux-66ak2g02-u-boot-pcie-endpoint-support

https://e2e.ti.com/support/processors-group/processors/f/processors-forum/611737/am5718-u-boot-pcie-driver

We do not need PCIe EP mode, we just need to enable PCIe functionality for K2G processor.

I am wondering if TI has added PCIe support to u-boot in a later release ? or in a different branch ? or has planned to do so?

Tom

over 3 years ago

0 Bin Liu over 3 years ago

TI__Guru**** 156061 points

Hi Tom,

Our u-boot expert is currently out of office, please expect delayed response next week.

0 Tom Chen over 3 years ago in reply to Bin Liu

Prodigy 150 points

Ok, thank you!

0 Hong Guan64 over 3 years ago in reply to Tom Chen

TI__Guru 65135 points

Hi Tom,
I'm not aware of PCIe support in u-boot for K2G.
Some reference on PCIe:
- TI RTOS PCIe (No design support from TI available. Refer to Overview- RTOS Highlights for details)
software-dl.ti.com/.../index_device_drv.html
- TI Linux SDK kernel PCIe driver
software-dl.ti.com/.../PCIe_End_Point.html
software-dl.ti.com/.../PCIe_Root_Complex.html
Best,
-Hong

0 Lawrence Wong over 3 years ago in reply to Tom Chen

TI__Genius 15300 points

Hi Tom,

Is there a reason you are looking for PCIe support in uboot?

Regards,

Lawrence

0 Tom Chen over 3 years ago in reply to Lawrence Wong

Prodigy 150 points

Hi Lawrence,

We have an application that uses a PCIe Network Interface Card (NIC) during boot stage. If PCIe is not enabled on K2G during U-boot, we can not get packets from the NIC. We did not expect that K2G PCIe functionality not enabled by default during U-Boot.

Tom

0 Lawrence Wong over 3 years ago in reply to Tom Chen

TI__Genius 15300 points

I take it waiting until Linux to boot is not an option and using the Ethernet interface on K2G (instead of using NIC) is not an option for you?

So as Hong mentioned there are no plans to support PCIe functionality in U-Boot. You will have to incorporate the appropriate driver from either Linux or RTOS.

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66AK2G12: 66AK2G12: u-boot PCIe support