[PATCH net-next v5 2/3] net: macb: Enable PTP unicast

Harini Katakam
2023-04-11T12:37:46Z

From: Harini Katakam <harini.katakam@xilinx.com>

Enable transmission and reception of PTP unicast packets by
updating PTP unicast config bit and setting current HW mac
address as allowed address in PTP unicast filter registers.

Signed-off-by: Harini Katakam <harini.katakam@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Radhey Shyam Pandey <radhey.shyam.pandey@xilinx.com>
---
v5 and v4:
No change
v3:
Remove config check as it is handled in gem_has_ptp
v2:
Handle operation using a single write as suggested by Cladiu

drivers/net/ethernet/cadence/macb.h | 4 ++++
drivers/net/ethernet/cadence/macb_main.c | 13 +++++++++++--
2 files changed, 15 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/cadence/macb.h b/drivers/net/ethernet/cadence/macb.h
index 07560803aa26..cfbdd0022764 100644
--- a/drivers/net/ethernet/cadence/macb.h
+++ b/drivers/net/ethernet/cadence/macb.h
@@ -95,6 +95,8 @@
#define GEM_SA4B 0x00A0 /* Specific4 Bottom */
#define GEM_SA4T 0x00A4 /* Specific4 Top */
#define GEM_WOL 0x00b8 /* Wake on LAN */
+#define GEM_RXPTPUNI 0x00D4 /* PTP RX Unicast address */
+#define GEM_TXPTPUNI 0x00D8 /* PTP TX Unicast address */
#define GEM_EFTSH 0x00e8 /* PTP Event Frame Transmitted Seconds Register 47:32 */
#define GEM_EFRSH 0x00ec /* PTP Event Frame Received Seconds Register 47:32 */
#define GEM_PEFTSH 0x00f0 /* PTP Peer Event Frame Transmitted Seconds Register 47:32 */
@@ -245,6 +247,8 @@
#define MACB_TZQ_OFFSET 12 /* Transmit zero quantum pause frame */
#define MACB_TZQ_SIZE 1
#define MACB_SRTSM_OFFSET 15 /* Store Receive Timestamp to Memory */
+#define MACB_PTPUNI_OFFSET 20 /* PTP Unicast packet enable */
+#define MACB_PTPUNI_SIZE 1
#define MACB_OSSMODE_OFFSET 24 /* Enable One Step Synchro Mode */
#define MACB_OSSMODE_SIZE 1
#define MACB_MIIONRGMII_OFFSET 28 /* MII Usage on RGMII Interface */
diff --git a/drivers/net/ethernet/cadence/macb_main.c b/drivers/net/ethernet/cadence/macb_main.c
index eab2d41fa571..e941ea365db1 100644
--- a/drivers/net/ethernet/cadence/macb_main.c
+++ b/drivers/net/ethernet/cadence/macb_main.c
@@ -287,6 +287,11 @@ static void macb_set_hwaddr(struct macb *bp)
top = cpu_to_le16(*((u16 *)(bp->dev->dev_addr + 4)));
macb_or_gem_writel(bp, SA1T, top);

+ if (gem_has_ptp(bp)) {
+ gem_writel(bp, RXPTPUNI, bottom);
+ gem_writel(bp, TXPTPUNI, bottom);
+ }
+
/* Clear unused address register sets */
macb_or_gem_writel(bp, SA2B, 0);
macb_or_gem_writel(bp, SA2T, 0);
@@ -773,8 +778,12 @@ static void macb_mac_link_up(struct phylink_config *config,

spin_unlock_irqrestore(&bp->lock, flags);

- /* Enable Rx and Tx */
- macb_writel(bp, NCR, macb_readl(bp, NCR) | MACB_BIT(RE) | MACB_BIT(TE));
+ /* Enable Rx and Tx; Enable PTP unicast */
+ ctrl = macb_readl(bp, NCR);
+ if (gem_has_ptp(bp))
+ ctrl |= MACB_BIT(PTPUNI);
+
+ macb_writel(bp, NCR, ctrl | MACB_BIT(RE) | MACB_BIT(TE));

netif_tx_wake_all_queues(ndev);
}
--
2.17.1