PTP testing on MPC8515E

[gouravjain]

Hi All,

I have two boards each having MPC8515E chipset.

Want to perform PTP testing (IEEE-1588), for timing synchronization between the boards.

As far as i understood about protocol, it needs 4 messages for synchronization.

But certain points are unclear for me,

1) How to make one board master and another one as a slave??

2) How to transmit PTP packets over ethernet from user space (one board to another)??

As of now i followed AN-3423.

Pls help me to get any useful documents/process for configuration and testing the same.

Thanks in advance.... 

Gourav

[bpe]

There is a Linux BSP for MPC8315E-RDB which supports PTP. Obtain the
BSP DVD image and look at help/documents/html/IEEE1588-MPC8315ERDB.html
The document explains exactly what you want - driver details plus a
test with two MPC8315E-RDB boards connected to each other.

Have a great day,
Platon

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[gouravjain]

Hi Platon,

Waiting for your reply...

[bpe]

Not sure where you have taken kernel 3.12 for MCP8313 from. The most recent
officially published BSP is based on 2.6.23 and offers an
identical IEEE 1588 enablement document. Anyway, newer kernels
should work, if configured and built correctly.   You can
try, for instance 3.12 from QorIQ SDK 1.6, all necessary files are there:

http://git.freescale.com/git/cgit.cgi/ppc/sdk/linux.git/tree/drivers/net/ethernet/freescale?id=fsl-s...

Please keep in mind, however, that the SDK supports processors
equipped with a compatible assist module, but _not_ the exact models
you are working with,  MPC8313 and MCP8315, so we did not verify it
on them.

Regards,

Platon

[gouravjain]

Hi Platon,

Linux 3.12 has gianfar.c and gianfar_ptp.c. After enabling ptp in .dts file, probe function of gianfar_ptp.c is getting called. (kept some prints).

Now, i want to perform ptp functionality test at driver level. Found the file timestamping.c under the path:

Documentation/networking/timestamping/timestamping.c

can you pls let me know how to use this file ??

Once it gets through, will run linux ptp stack "linuxptp-2.0" on my card.

thanks,

Gourav 

[gouravjain]

Hi,

Another query is, 

When i run linuxptp-2 on my card , getting following message,

root@CDOT-BBWT:/# ./ptp4l -i eth1 -m
ptp4l[102948.455GJ: ptp_gianfar_adjfreq
]: selected /dev/ptp0 as PTP clock
ptp4l[102948.463]: port 1: INITIALIZING to LISTENING on INIT_COMPLETE
ptp4l[102948.465]: port 0: INITIALIZING to LISTENING on INIT_COMPLETE
ptp4l[102954.484]: port 1: LISTENING to MASTER on ANNOUNCE_RECEIPT_TIMEOUT_EXPIRES
ptp4l[102954.484]: selected local clock 002488.fffe.003ca3 as best master
ptp4l[102954.484]: assuming the grand master role
ptp4l[102955.488]: missing timestamp on transmitted sync
ptp4l[102955.489]: port 1: MASTER to FAULTY on FAULT_DETECTED (FT_UNSPECIFIED)

seems like last two lines are error. can you pls let me know what does it mean ???

[bpe]

As I have already informed you, we cannot share any experience with
the kernel and the application you are trying to use on this processor.
My recommendation in this regard is, debug it. If yo wish NXP to
customize your software to run on your device, consider out paid
Professional Services:

https://www.nxp.com/support/support/nxp-professional-services:PROFESSIONAL-SERVICE

Have a great day,
Platon

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[gouravjain]

Hi Platon,

Thanks for your response...

I have downloaded MPC8315eRDB image. After going through doc "help/documents/html/IEEE1588-MPC8315ERDB.html" 

what i understood that we need 2 files,

1) gianfar.c

2) gianfar_1588.c

As of now MPC8313eRDB is being used in our card but i'm not able to find any  gianfar_1588.c file. 

Can you pls let me know how to integrate gianfar_1588.c in MPC8313eRDB.

regards,

Gourav 

[gouravjain]

Hi,

MPC8315eRDB has linux2.6.29.6 while MPC8313eRDB which we are using has linux-3.12. Thats why we need support of gianfar_1588.c in linux-3.12.

Another doubt is how to locate "ptp_eth1" application in  MPC8315eRDB  ???