topic Re: P2040: mac to mac connection in P-Series

P2040: mac to mac connection

gouravjain — Mon, 21 Aug 2017 04:41:39 GMT

Hi experts,

We have designed custom board based on P2040RDB. Here we have mac to mac connection between processor P2040 and Vittesse switch.

can anyone pls guide me what all changes are required in uboot to make it through? Currently we are working on U-Boot 2013.01

Any help will be appreciated.

Note: schematic files are attached for reference.

thanks,

Gourav

Re: P2040: mac to mac connection

Pavel — Mon, 21 Aug 2017 06:13:06 GMT

This mac-to-mac connection is a “fixed-link” under Linux.

If similar connection under Linux is used tree node and a “fixed-link” property have been added. Details can be found in

Documentation/devicetree/bindings/net/fsl-tsec-phy.txt

If this connection is used under u-boot see the following pages:

https://patchwork.ozlabs.org/patch/291191/

and

https://patchwork.ozlabs.org/patch/742677/

https://lists.denx.de/pipermail/u-boot/2013-November/167163.html

Have a great day,
Pavel Chubakov

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Re: P2040: mac to mac connection

gouravjain — Mon, 21 Aug 2017 09:04:04 GMT

Hi Paval,

[U-Boot,3/4] powerpc/t2080qds: add support for t2080qds board - Patchwork

In above link, they have a function call fdt_delprop and fdt_setprop. but i dont have in my file.

+     } else if (fm_info_get_enet_if(port) == PHY_INTERFACE_MODE_XGMII) {+          switch (srds_s1) {+          case 0x66: /* XFI interface */+          case 0x6b:+          case 0x6c:+          case 0x6d:+          case 0x71:+               f_link.phy_id = port;+               f_link.duplex = 1;+               f_link.link_speed = 10000;+               f_link.pause = 0;+               f_link.asym_pause = 0;+               /* no PHY for XFI */+               fdt_delprop(fdt, offset, "phy-handle");+               fdt_setprop(fdt, offset, "fixed-link", &f_link,+                        sizeof(f_link));+               break;+          default:+               break;+          }

Re: P2040: mac to mac connection

gouravjain — Mon, 21 Aug 2017 09:07:47 GMT

hi,

my file is,

u-boot/eth.c at master · ohporter/u-boot · GitHub

can you pls tell me how to make changes here ??

regards,

Gourav

Re: P2040: mac to mac connection

Pavel — Mon, 21 Aug 2017 10:13:05 GMT

We use NXP SDK 1.9 for the T2080QDS board. This SDK is available on the following page:

http://www.nxp.com/products/developer-resources/run-time-software/linux-sdk/linux-sdk-for-qoriq-processors:SDKLINUX?tab=Design_Tools_Tab

Compare u-boot files from this SDK and your u-boot files. Perhaps u-boot from this SDK can be used on your board.

Have a great day,
Pavel Chubakov

Re: P2040: mac to mac connection

gouravjain — Fri, 01 Sep 2017 08:28:57 GMT

hi Paval

1) Which SDK i should download from below link,

https://nxp.flexnetoperations.com/control/frse/download?agree=Accept&element=7726177

2) I was trying to understand the dtsec initialization code flow. And found new module called TBI PHY.

As far as i understood TBI module sits between MAC and outside phy device. MAC (PPC) <---> TBI (PPC)<---> external phy.

So first auto-negotiation should happen between TBI (PPC) and external phy then only MAC(PPC) will be configured. Correct me if im wrong.

But there is no TBI link status checking in code(LXR uboot/drivers/net/fm/eth.c ) after that mac is supposed to configure.

Can you pls tell where my understand is getting wronged?

Gourav