AM5718: U-boot PCIe driver

Philippe COTARD

Prodigy 70 points

Part Number: AM5718

Hello,

I need to enable the PCI driver for the AM5718 board, in u-boot.

I used the u-boot provided in 04.00.00.04 sdk (last version available at this time).

When selection PCI driver in u-boot menuconfig, I have the following error during the compilation:

drivers/pci/built-in.o: In function `pci_init':
drivers/pci/pci.c:466: undefined reference to `pci_init_board'

A quick search of pci in boards/ti/ returns no occurrence.

It looks like there is no PCI initialization driver available in u-boot for TI boards.

Do you have a u-boot PCI driver available for am5718 board ? Is there a workaround in order to initialize PCI in u-boot?

I tried the u-boot from denx.de, and I have the same compilation problem.

Best regards

over 6 years ago

0 Biser Gatchev-XID over 6 years ago

TI__Guru**** 393215 points

The software team have been notified. They will respond here.

0 Rex Chang over 6 years ago in reply to Biser Gatchev-XID

TI__Guru 50170 points

Hi, Philippe,

U-boot does not support PCIe. It is only supported in Kernel. What's the use case that you need to initialized the PCIe or to enumerate PCIe end device in u-boot instead of kernel? There was a similar discussion but for the TI K2G device (e2e.ti.com/.../2191935. If kernel is not needed as discussed in the thread, you may want to consider using RTOS startup program on ARM to initialize the PCIe.

Rex

0 Philippe COTARD over 6 years ago in reply to Rex Chang

Prodigy 70 points

Hi Rex,

Thank you for your answer.
The reason to do this is that we need to run an OS which does not handle the PCI initialization.
This OS expects the bootloader to have configured the PCI before jumping to the kernel.
The PCI driver then reads the PCI configuration set by the bootloader.

We'll have either to develop a u-boot PCI driver on our side, or make our OS handle PCI initialization.

Regards

0 Rex Chang over 6 years ago in reply to Philippe COTARD

TI__Guru 50170 points

Philippe,

There is a PCIe EP example in RTOS procSDK which you can refer for the initialization if that helps.

Rex

Processors

Processors forum

AM5718: U-boot PCIe driver