[Linuxptp-devel] Doubt Hardware Time Stamping

[Imanol Allende]

This is my first post, so I am not sure if it is done like this.

I have some problems executing ptp4l. I am using the xilinx_emaclite driver
for the MAC and the DP83640 driver for the PHY. However, when I execute the
ptp4l i get the following:

# ./ptp4l -i eth0 -p /dev/ptp0 -m -l 6 -2 -E

ptp4l[1637.250]: selected /dev/ptp0 as PTP clock

ptp4l[1637.340]: driver rejected most general HWTSTAMP filter

ptp4l[1637.340]: ioctl SIOCSHWTSTAMP failed: Operation not supported

ptp4l[1637.400]: port 1: INITIALIZING to FAULTY on INITIALIZE

ptp4l[1637.400]: port 0: INITIALIZING to LISTENING on INITIALIZE

ptp4l[1637.401]: port 1: link down


I have examined the xilinx_emaclite driver and it does not have ioctl
function implemented and neither the
SIOCSHWTSTAMP. However, in the main README it says that the emaclite
driver is compatible with PTP4L with PHY level hardware time stamping (emaclite
Xilinx Ethernet Lite 3.1 Y ).




# ./hwstamp_ctl -i eth0

Device driver does not have support for non-destructive SIOCGHWTSTAMP.


# ./ethtool -T eth0

Time stamping parameters for eth0:

Capabilities:

hardware-transmit (SOF_TIMESTAMPING_TX_HARDWARE)

hardware-receive (SOF_TIMESTAMPING_RX_HARDWARE)

hardware-raw-clock (SOF_TIMESTAMPING_RAW_HARDWARE)

PTP Hardware Clock: 0

Hardware Transmit Timestamp Modes:

off (HWTSTAMP_TX_OFF)

on (HWTSTAMP_TX_ON)

one-step-sync (HWTSTAMP_TX_ONESTEP_SYNC)

Hardware Receive Filter Modes:

none (HWTSTAMP_FILTER_NONE)

ptpv1-l4-event (HWTSTAMP_FILTER_PTP_V1_L4_EVENT)

ptpv2-l4-event (HWTSTAMP_FILTER_PTP_V2_L4_EVENT)

ptpv2-l2-event (HWTSTAMP_FILTER_PTP_V2_L2_EVENT)

ptpv2-event (HWTSTAMP_FILTER_PTP_V2_EVENT)


# ./phc_ctl /dev/ptp0

phc_ctl[5264.357]:

capabilities:

1953124 maximum frequency adjustment (ppb)

0 programable alarms

6 external time stamp channels

7 programmable periodic signals

doesn't have pulse per second support

[Richard Cochran]

Post by Imanol Allende
I have some problems executing ptp4l. I am using the xilinx_emaclite driver
for the MAC and the DP83640 driver for the PHY.

If you want to use the DP83640 for PTP, then you must remove the PTP
code (if any) from your MAC driver. In addition, your MAC driver must
use phylib.

Post by Imanol Allende
I have examined the xilinx_emaclite driver and it does not have ioctl
function implemented and neither the
SIOCSHWTSTAMP. However, in the main README it says that the emaclite
driver is compatible with PTP4L with PHY level hardware time stamping (emaclite
Xilinx Ethernet Lite 3.1 Y ).

I cannot help you with out-of-tree drivers. Please ask your vendor
for help.

Thanks,
Richard