88E6341 devices default to timestamping at the PHY, but due to a
hardware issue, timestamps via this component are unreliable. For
this family, configure the PTP hardware to force the timestamping
to occur at the MAC.
Signed-off-by: Brandon Streiff <brandon.streiff@ni.com>
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
if (err)
return err;
+ /* 88E6341 devices default to timestamping at the PHY, but this has
+ * a hardware issue that results in unreliable timestamps. Force
+ * these devices to timestamp at the MAC.
+ */
+ if (chip->info->family == MV88E6XXX_FAMILY_6341) {
+ u16 val = MV88E6341_PTP_CFG_UPDATE |
+ MV88E6341_PTP_CFG_MODE_IDX |
+ MV88E6341_PTP_CFG_MODE_TS_AT_MAC;
+ err = mv88e6xxx_ptp_write(chip, MV88E6341_PTP_CFG, val);
+ if (err)
+ return err;
+ }
+
return 0;
}
/* Offset 0x02: Timestamp Arrival Capture Pointers */
#define MV88E6XXX_PTP_TS_ARRIVAL_PTR 0x02
+/* Offset 0x07: PTP Global Configuration */
+#define MV88E6341_PTP_CFG 0x07
+#define MV88E6341_PTP_CFG_UPDATE 0x8000
+#define MV88E6341_PTP_CFG_IDX_MASK 0x7f00
+#define MV88E6341_PTP_CFG_DATA_MASK 0x00ff
+#define MV88E6341_PTP_CFG_MODE_IDX 0x0
+#define MV88E6341_PTP_CFG_MODE_TS_AT_PHY 0x00
+#define MV88E6341_PTP_CFG_MODE_TS_AT_MAC 0x80
+
/* Offset 0x08: PTP Interrupt Status */
#define MV88E6XXX_PTP_IRQ_STATUS 0x08