Merge branch 'support-ptp-clock-for-wangxun-nics'

Jiawen Wu says: ==================== Support PTP clock for Wangxun NICs Implement support for PTP clock on Wangxun NICs. v7: https://lore.kernel.org/20250213083041.78917-1-jiawenwu@trustnetic.com v6: https://lore.kernel.org/20250208031348.4368-1-jiawenwu@trustnetic.com v5: https://lore.kernel.org/20250117062051.2257073-1-jiawenwu@trustnetic.com v4: https://lore.kernel.org/20250114084425.2203428-1-jiawenwu@trustnetic.com v3: https://lore.kernel.org/20250110031716.2120642-1-jiawenwu@trustnetic.com v2: https://lore.kernel.org/20250106084506.2042912-1-jiawenwu@trustnetic.com v1: https://lore.kernel.org/20250102103026.1982137-1-jiawenwu@trustnetic.com ==================== Link: https://patch.msgid.link/20250218023432.146536-1-jiawenwu@trustnetic.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-03-02 17:52:36 -05:00 · 2025-02-20 14:59:39 -08:00
parent 4adf749710 2d8967e86c
commit f438d8da3c
17 changed files with 1194 additions and 7 deletions
--- a/drivers/net/ethernet/wangxun/Kconfig
+++ b/drivers/net/ethernet/wangxun/Kconfig
@@ -18,6 +18,7 @@ if NET_VENDOR_WANGXUN

 config LIBWX
 	tristate
+	depends on PTP_1588_CLOCK_OPTIONAL
 	select PAGE_POOL
 	help
 	Common library for Wangxun(R) Ethernet drivers.
--- a/drivers/net/ethernet/wangxun/libwx/Makefile
+++ b/drivers/net/ethernet/wangxun/libwx/Makefile
@@ -4,4 +4,4 @@

 obj-$(CONFIG_LIBWX) += libwx.o

-libwx-objs := wx_hw.o wx_lib.o wx_ethtool.o
+libwx-objs := wx_hw.o wx_lib.o wx_ethtool.o wx_ptp.o
--- a/drivers/net/ethernet/wangxun/libwx/wx_ethtool.c
+++ b/drivers/net/ethernet/wangxun/libwx/wx_ethtool.c
@@ -41,6 +41,9 @@ static const struct wx_stats wx_gstrings_stats[] = {
 	WX_STAT("rx_csum_offload_good_count", hw_csum_rx_good),
 	WX_STAT("rx_csum_offload_errors", hw_csum_rx_error),
 	WX_STAT("alloc_rx_buff_failed", alloc_rx_buff_failed),
+	WX_STAT("tx_hwtstamp_timeouts", tx_hwtstamp_timeouts),
+	WX_STAT("tx_hwtstamp_skipped", tx_hwtstamp_skipped),
+	WX_STAT("rx_hwtstamp_cleared", rx_hwtstamp_cleared),
 };

 static const struct wx_stats wx_gstrings_fdir_stats[] = {
@@ -452,3 +455,53 @@ void wx_set_msglevel(struct net_device *netdev, u32 data)
 	wx->msg_enable = data;
 }
 EXPORT_SYMBOL(wx_set_msglevel);
+
+int wx_get_ts_info(struct net_device *dev,
+		   struct kernel_ethtool_ts_info *info)
+{
+	struct wx *wx = netdev_priv(dev);
+
+	info->rx_filters = BIT(HWTSTAMP_FILTER_NONE) |
+			   BIT(HWTSTAMP_FILTER_PTP_V1_L4_SYNC) |
+			   BIT(HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ) |
+			   BIT(HWTSTAMP_FILTER_PTP_V2_L2_EVENT) |
+			   BIT(HWTSTAMP_FILTER_PTP_V2_L4_EVENT) |
+			   BIT(HWTSTAMP_FILTER_PTP_V2_SYNC) |
+			   BIT(HWTSTAMP_FILTER_PTP_V2_L2_SYNC) |
+			   BIT(HWTSTAMP_FILTER_PTP_V2_L4_SYNC) |
+			   BIT(HWTSTAMP_FILTER_PTP_V2_DELAY_REQ) |
+			   BIT(HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ) |
+			   BIT(HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ) |
+			   BIT(HWTSTAMP_FILTER_PTP_V2_EVENT);
+
+	info->so_timestamping = SOF_TIMESTAMPING_TX_SOFTWARE |
+				SOF_TIMESTAMPING_TX_HARDWARE |
+				SOF_TIMESTAMPING_RX_HARDWARE |
+				SOF_TIMESTAMPING_RAW_HARDWARE;
+
+	if (wx->ptp_clock)
+		info->phc_index = ptp_clock_index(wx->ptp_clock);
+	else
+		info->phc_index = -1;
+
+	info->tx_types = BIT(HWTSTAMP_TX_OFF) |
+			 BIT(HWTSTAMP_TX_ON);
+
+	return 0;
+}
+EXPORT_SYMBOL(wx_get_ts_info);
+
+void wx_get_ptp_stats(struct net_device *dev,
+		      struct ethtool_ts_stats *ts_stats)
+{
+	struct wx *wx = netdev_priv(dev);
+
+	if (wx->ptp_clock) {
+		ts_stats->pkts = wx->tx_hwtstamp_pkts;
+		ts_stats->lost = wx->tx_hwtstamp_timeouts +
+				 wx->tx_hwtstamp_skipped +
+				 wx->rx_hwtstamp_cleared;
+		ts_stats->err = wx->tx_hwtstamp_errors;
+	}
+}
+EXPORT_SYMBOL(wx_get_ptp_stats);
--- a/drivers/net/ethernet/wangxun/libwx/wx_ethtool.h
+++ b/drivers/net/ethernet/wangxun/libwx/wx_ethtool.h
@@ -40,4 +40,8 @@ int wx_set_channels(struct net_device *dev,
 		    struct ethtool_channels *ch);
 u32 wx_get_msglevel(struct net_device *netdev);
 void wx_set_msglevel(struct net_device *netdev, u32 data);
+int wx_get_ts_info(struct net_device *dev,
+		   struct kernel_ethtool_ts_info *info);
+void wx_get_ptp_stats(struct net_device *dev,
+		      struct ethtool_ts_stats *ts_stats);
 #endif /* _WX_ETHTOOL_H_ */
--- a/drivers/net/ethernet/wangxun/libwx/wx_hw.c
+++ b/drivers/net/ethernet/wangxun/libwx/wx_hw.c
@@ -393,6 +393,25 @@ int wx_host_interface_command(struct wx *wx, u32 *buffer,
 }
 EXPORT_SYMBOL(wx_host_interface_command);

+int wx_set_pps(struct wx *wx, bool enable, u64 nsec, u64 cycles)
+{
+	struct wx_hic_set_pps pps_cmd;
+
+	pps_cmd.hdr.cmd = FW_PPS_SET_CMD;
+	pps_cmd.hdr.buf_len = FW_PPS_SET_LEN;
+	pps_cmd.hdr.cmd_or_resp.cmd_resv = FW_CEM_CMD_RESERVED;
+	pps_cmd.lan_id = wx->bus.func;
+	pps_cmd.enable = (u8)enable;
+	pps_cmd.nsec = nsec;
+	pps_cmd.cycles = cycles;
+	pps_cmd.hdr.checksum = FW_DEFAULT_CHECKSUM;
+
+	return wx_host_interface_command(wx, (u32 *)&pps_cmd,
+					 sizeof(pps_cmd),
+					 WX_HI_COMMAND_TIMEOUT,
+					 false);
+}
+
 /**
 *  wx_read_ee_hostif_data - Read EEPROM word using a host interface cmd
 *  assuming that the semaphore is already obtained.
--- a/drivers/net/ethernet/wangxun/libwx/wx_hw.h
+++ b/drivers/net/ethernet/wangxun/libwx/wx_hw.h
@@ -18,6 +18,7 @@ void wx_control_hw(struct wx *wx, bool drv);
 int wx_mng_present(struct wx *wx);
 int wx_host_interface_command(struct wx *wx, u32 *buffer,
 			      u32 length, u32 timeout, bool return_data);
+int wx_set_pps(struct wx *wx, bool enable, u64 nsec, u64 cycles);
 int wx_read_ee_hostif(struct wx *wx, u16 offset, u16 *data);
 int wx_read_ee_hostif_buffer(struct wx *wx,
 			     u16 offset, u16 words, u16 *data);
--- a/drivers/net/ethernet/wangxun/libwx/wx_lib.c
+++ b/drivers/net/ethernet/wangxun/libwx/wx_lib.c
@@ -13,6 +13,7 @@

 #include "wx_type.h"
 #include "wx_lib.h"
+#include "wx_ptp.h"
 #include "wx_hw.h"

 /* Lookup table mapping the HW PTYPE to the bit field for decoding */
@@ -597,8 +598,17 @@ static void wx_process_skb_fields(struct wx_ring *rx_ring,
 				  union wx_rx_desc *rx_desc,
 				  struct sk_buff *skb)
 {
+	struct wx *wx = netdev_priv(rx_ring->netdev);
+
 	wx_rx_hash(rx_ring, rx_desc, skb);
 	wx_rx_checksum(rx_ring, rx_desc, skb);
+
+	if (unlikely(test_bit(WX_FLAG_RX_HWTSTAMP_ENABLED, wx->flags)) &&
+	    unlikely(wx_test_staterr(rx_desc, WX_RXD_STAT_TS))) {
+		wx_ptp_rx_hwtstamp(rx_ring->q_vector->wx, skb);
+		rx_ring->last_rx_timestamp = jiffies;
+	}
+
 	wx_rx_vlan(rx_ring, rx_desc, skb);
 	skb_record_rx_queue(skb, rx_ring->queue_index);
 	skb->protocol = eth_type_trans(skb, rx_ring->netdev);
@@ -705,6 +715,7 @@ static bool wx_clean_tx_irq(struct wx_q_vector *q_vector,
 {
 	unsigned int budget = q_vector->wx->tx_work_limit;
 	unsigned int total_bytes = 0, total_packets = 0;
+	struct wx *wx = netdev_priv(tx_ring->netdev);
 	unsigned int i = tx_ring->next_to_clean;
 	struct wx_tx_buffer *tx_buffer;
 	union wx_tx_desc *tx_desc;
@@ -737,6 +748,11 @@ static bool wx_clean_tx_irq(struct wx_q_vector *q_vector,
 		total_bytes += tx_buffer->bytecount;
 		total_packets += tx_buffer->gso_segs;

+		/* schedule check for Tx timestamp */
+		if (unlikely(test_bit(WX_STATE_PTP_TX_IN_PROGRESS, wx->state)) &&
+		    skb_shinfo(tx_buffer->skb)->tx_flags & SKBTX_IN_PROGRESS)
+			ptp_schedule_worker(wx->ptp_clock, 0);
+
 		/* free the skb */
 		napi_consume_skb(tx_buffer->skb, napi_budget);

@@ -932,9 +948,9 @@ static void wx_tx_olinfo_status(union wx_tx_desc *tx_desc,
 	tx_desc->read.olinfo_status = cpu_to_le32(olinfo_status);
 }

-static void wx_tx_map(struct wx_ring *tx_ring,
-		      struct wx_tx_buffer *first,
-		      const u8 hdr_len)
+static int wx_tx_map(struct wx_ring *tx_ring,
+		     struct wx_tx_buffer *first,
+		     const u8 hdr_len)
 {
 	struct sk_buff *skb = first->skb;
 	struct wx_tx_buffer *tx_buffer;
@@ -1013,6 +1029,8 @@ static void wx_tx_map(struct wx_ring *tx_ring,

 	netdev_tx_sent_queue(wx_txring_txq(tx_ring), first->bytecount);

+	/* set the timestamp */
+	first->time_stamp = jiffies;
 	skb_tx_timestamp(skb);

 	/* Force memory writes to complete before letting h/w know there
@@ -1038,7 +1056,7 @@ static void wx_tx_map(struct wx_ring *tx_ring,
 	if (netif_xmit_stopped(wx_txring_txq(tx_ring)) || !netdev_xmit_more())
 		writel(i, tx_ring->tail);

-	return;
+	return 0;
 dma_error:
 	dev_err(tx_ring->dev, "TX DMA map failed\n");

@@ -1062,6 +1080,8 @@ static void wx_tx_map(struct wx_ring *tx_ring,
 	first->skb = NULL;

 	tx_ring->next_to_use = i;
+
+	return -ENOMEM;
 }

 static void wx_tx_ctxtdesc(struct wx_ring *tx_ring, u32 vlan_macip_lens,
@@ -1486,6 +1506,20 @@ static netdev_tx_t wx_xmit_frame_ring(struct sk_buff *skb,
 		tx_flags |= WX_TX_FLAGS_HW_VLAN;
 	}

+	if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) &&
+	    wx->ptp_clock) {
+		if (wx->tstamp_config.tx_type == HWTSTAMP_TX_ON &&
+		    !test_and_set_bit_lock(WX_STATE_PTP_TX_IN_PROGRESS,
+					   wx->state)) {
+			skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
+			tx_flags |= WX_TX_FLAGS_TSTAMP;
+			wx->ptp_tx_skb = skb_get(skb);
+			wx->ptp_tx_start = jiffies;
+		} else {
+			wx->tx_hwtstamp_skipped++;
+		}
+	}
+
 	/* record initial flags and protocol */
 	first->tx_flags = tx_flags;
 	first->protocol = vlan_get_protocol(skb);
@@ -1501,12 +1535,20 @@ static netdev_tx_t wx_xmit_frame_ring(struct sk_buff *skb,
 	if (test_bit(WX_FLAG_FDIR_CAPABLE, wx->flags) && tx_ring->atr_sample_rate)
 		wx->atr(tx_ring, first, ptype);

-	wx_tx_map(tx_ring, first, hdr_len);
+	if (wx_tx_map(tx_ring, first, hdr_len))
+		goto cleanup_tx_tstamp;

 	return NETDEV_TX_OK;
 out_drop:
 	dev_kfree_skb_any(first->skb);
 	first->skb = NULL;
+cleanup_tx_tstamp:
+	if (unlikely(tx_flags & WX_TX_FLAGS_TSTAMP)) {
+		dev_kfree_skb_any(wx->ptp_tx_skb);
+		wx->ptp_tx_skb = NULL;
+		wx->tx_hwtstamp_errors++;
+		clear_bit_unlock(WX_STATE_PTP_TX_IN_PROGRESS, wx->state);
+	}

 	return NETDEV_TX_OK;
 }
--- a/drivers/net/ethernet/wangxun/libwx/wx_ptp.c
+++ b/drivers/net/ethernet/wangxun/libwx/wx_ptp.c
@@ -0,0 +1,883 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Copyright (c) 2015 - 2025 Beijing WangXun Technology Co., Ltd. */
+/* Copyright (c) 1999 - 2025 Intel Corporation. */
+
+#include <linux/ptp_classify.h>
+#include <linux/clocksource.h>
+#include <linux/pci.h>
+
+#include "wx_type.h"
+#include "wx_ptp.h"
+#include "wx_hw.h"
+
+#define WX_INCVAL_10GB        0xCCCCCC
+#define WX_INCVAL_1GB         0x800000
+#define WX_INCVAL_100         0xA00000
+#define WX_INCVAL_10          0xC7F380
+#define WX_INCVAL_EM          0x2000000
+
+#define WX_INCVAL_SHIFT_10GB  20
+#define WX_INCVAL_SHIFT_1GB   18
+#define WX_INCVAL_SHIFT_100   15
+#define WX_INCVAL_SHIFT_10    12
+#define WX_INCVAL_SHIFT_EM    22
+
+#define WX_OVERFLOW_PERIOD    (HZ * 30)
+#define WX_PTP_TX_TIMEOUT     (HZ)
+
+#define WX_1588_PPS_WIDTH_EM  120
+
+#define WX_NS_PER_SEC         1000000000ULL
+
+static u64 wx_ptp_timecounter_cyc2time(struct wx *wx, u64 timestamp)
+{
+	unsigned int seq;
+	u64 ns;
+
+	do {
+		seq = read_seqbegin(&wx->hw_tc_lock);
+		ns = timecounter_cyc2time(&wx->hw_tc, timestamp);
+	} while (read_seqretry(&wx->hw_tc_lock, seq));
+
+	return ns;
+}
+
+static u64 wx_ptp_readtime(struct wx *wx, struct ptp_system_timestamp *sts)
+{
+	u32 timeh1, timeh2, timel;
+
+	timeh1 = rd32ptp(wx, WX_TSC_1588_SYSTIMH);
+	ptp_read_system_prets(sts);
+	timel = rd32ptp(wx, WX_TSC_1588_SYSTIML);
+	ptp_read_system_postts(sts);
+	timeh2 = rd32ptp(wx, WX_TSC_1588_SYSTIMH);
+
+	if (timeh1 != timeh2) {
+		ptp_read_system_prets(sts);
+		timel = rd32ptp(wx, WX_TSC_1588_SYSTIML);
+		ptp_read_system_prets(sts);
+	}
+	return (u64)timel | (u64)timeh2 << 32;
+}
+
+static int wx_ptp_adjfine(struct ptp_clock_info *ptp, long ppb)
+{
+	struct wx *wx = container_of(ptp, struct wx, ptp_caps);
+	u64 incval, mask;
+
+	smp_mb(); /* Force any pending update before accessing. */
+	incval = READ_ONCE(wx->base_incval);
+	incval = adjust_by_scaled_ppm(incval, ppb);
+
+	mask = (wx->mac.type == wx_mac_em) ? 0x7FFFFFF : 0xFFFFFF;
+	incval &= mask;
+	if (wx->mac.type != wx_mac_em)
+		incval |= 2 << 24;
+
+	wr32ptp(wx, WX_TSC_1588_INC, incval);
+
+	return 0;
+}
+
+static int wx_ptp_adjtime(struct ptp_clock_info *ptp, s64 delta)
+{
+	struct wx *wx = container_of(ptp, struct wx, ptp_caps);
+	unsigned long flags;
+
+	write_seqlock_irqsave(&wx->hw_tc_lock, flags);
+	timecounter_adjtime(&wx->hw_tc, delta);
+	write_sequnlock_irqrestore(&wx->hw_tc_lock, flags);
+
+	if (wx->ptp_setup_sdp)
+		wx->ptp_setup_sdp(wx);
+
+	return 0;
+}
+
+static int wx_ptp_gettimex64(struct ptp_clock_info *ptp,
+			     struct timespec64 *ts,
+			     struct ptp_system_timestamp *sts)
+{
+	struct wx *wx = container_of(ptp, struct wx, ptp_caps);
+	u64 ns, stamp;
+
+	stamp = wx_ptp_readtime(wx, sts);
+	ns = wx_ptp_timecounter_cyc2time(wx, stamp);
+	*ts = ns_to_timespec64(ns);
+
+	return 0;
+}
+
+static int wx_ptp_settime64(struct ptp_clock_info *ptp,
+			    const struct timespec64 *ts)
+{
+	struct wx *wx = container_of(ptp, struct wx, ptp_caps);
+	unsigned long flags;
+	u64 ns;
+
+	ns = timespec64_to_ns(ts);
+	/* reset the timecounter */
+	write_seqlock_irqsave(&wx->hw_tc_lock, flags);
+	timecounter_init(&wx->hw_tc, &wx->hw_cc, ns);
+	write_sequnlock_irqrestore(&wx->hw_tc_lock, flags);
+
+	if (wx->ptp_setup_sdp)
+		wx->ptp_setup_sdp(wx);
+
+	return 0;
+}
+
+/**
+ * wx_ptp_clear_tx_timestamp - utility function to clear Tx timestamp state
+ * @wx: the private board structure
+ *
+ * This function should be called whenever the state related to a Tx timestamp
+ * needs to be cleared. This helps ensure that all related bits are reset for
+ * the next Tx timestamp event.
+ */
+static void wx_ptp_clear_tx_timestamp(struct wx *wx)
+{
+	rd32ptp(wx, WX_TSC_1588_STMPH);
+	if (wx->ptp_tx_skb) {
+		dev_kfree_skb_any(wx->ptp_tx_skb);
+		wx->ptp_tx_skb = NULL;
+	}
+	clear_bit_unlock(WX_STATE_PTP_TX_IN_PROGRESS, wx->state);
+}
+
+/**
+ * wx_ptp_convert_to_hwtstamp - convert register value to hw timestamp
+ * @wx: private board structure
+ * @hwtstamp: stack timestamp structure
+ * @timestamp: unsigned 64bit system time value
+ *
+ * We need to convert the adapter's RX/TXSTMP registers into a hwtstamp value
+ * which can be used by the stack's ptp functions.
+ *
+ * The lock is used to protect consistency of the cyclecounter and the SYSTIME
+ * registers. However, it does not need to protect against the Rx or Tx
+ * timestamp registers, as there can't be a new timestamp until the old one is
+ * unlatched by reading.
+ *
+ * In addition to the timestamp in hardware, some controllers need a software
+ * overflow cyclecounter, and this function takes this into account as well.
+ **/
+static void wx_ptp_convert_to_hwtstamp(struct wx *wx,
+				       struct skb_shared_hwtstamps *hwtstamp,
+				       u64 timestamp)
+{
+	u64 ns;
+
+	ns = wx_ptp_timecounter_cyc2time(wx, timestamp);
+	hwtstamp->hwtstamp = ns_to_ktime(ns);
+}
+
+/**
+ * wx_ptp_tx_hwtstamp - utility function which checks for TX time stamp
+ * @wx: the private board struct
+ *
+ * if the timestamp is valid, we convert it into the timecounter ns
+ * value, then store that result into the shhwtstamps structure which
+ * is passed up the network stack
+ */
+static void wx_ptp_tx_hwtstamp(struct wx *wx)
+{
+	struct skb_shared_hwtstamps shhwtstamps;
+	struct sk_buff *skb = wx->ptp_tx_skb;
+	u64 regval = 0;
+
+	regval |= (u64)rd32ptp(wx, WX_TSC_1588_STMPL);
+	regval |= (u64)rd32ptp(wx, WX_TSC_1588_STMPH) << 32;
+
+	wx_ptp_convert_to_hwtstamp(wx, &shhwtstamps, regval);
+
+	wx->ptp_tx_skb = NULL;
+	clear_bit_unlock(WX_STATE_PTP_TX_IN_PROGRESS, wx->state);
+	skb_tstamp_tx(skb, &shhwtstamps);
+	dev_kfree_skb_any(skb);
+	wx->tx_hwtstamp_pkts++;
+}
+
+static int wx_ptp_tx_hwtstamp_work(struct wx *wx)
+{
+	u32 tsynctxctl;
+
+	/* we have to have a valid skb to poll for a timestamp */
+	if (!wx->ptp_tx_skb) {
+		wx_ptp_clear_tx_timestamp(wx);
+		return 0;
+	}
+
+	/* stop polling once we have a valid timestamp */
+	tsynctxctl = rd32ptp(wx, WX_TSC_1588_CTL);
+	if (tsynctxctl & WX_TSC_1588_CTL_VALID) {
+		wx_ptp_tx_hwtstamp(wx);
+		return 0;
+	}
+
+	return -1;
+}
+
+/**
+ * wx_ptp_overflow_check - watchdog task to detect SYSTIME overflow
+ * @wx: pointer to wx struct
+ *
+ * this watchdog task periodically reads the timecounter
+ * in order to prevent missing when the system time registers wrap
+ * around. This needs to be run approximately twice a minute for the fastest
+ * overflowing hardware. We run it for all hardware since it shouldn't have a
+ * large impact.
+ */
+static void wx_ptp_overflow_check(struct wx *wx)
+{
+	bool timeout = time_is_before_jiffies(wx->last_overflow_check +
+					      WX_OVERFLOW_PERIOD);
+	unsigned long flags;
+
+	if (timeout) {
+		/* Update the timecounter */
+		write_seqlock_irqsave(&wx->hw_tc_lock, flags);
+		timecounter_read(&wx->hw_tc);
+		write_sequnlock_irqrestore(&wx->hw_tc_lock, flags);
+
+		wx->last_overflow_check = jiffies;
+	}
+}
+
+/**
+ * wx_ptp_rx_hang - detect error case when Rx timestamp registers latched
+ * @wx: pointer to wx struct
+ *
+ * this watchdog task is scheduled to detect error case where hardware has
+ * dropped an Rx packet that was timestamped when the ring is full. The
+ * particular error is rare but leaves the device in a state unable to
+ * timestamp any future packets.
+ */
+static void wx_ptp_rx_hang(struct wx *wx)
+{
+	struct wx_ring *rx_ring;
+	unsigned long rx_event;
+	u32 tsyncrxctl;
+	int n;
+
+	tsyncrxctl = rd32(wx, WX_PSR_1588_CTL);
+
+	/* if we don't have a valid timestamp in the registers, just update the
+	 * timeout counter and exit
+	 */
+	if (!(tsyncrxctl & WX_PSR_1588_CTL_VALID)) {
+		wx->last_rx_ptp_check = jiffies;
+		return;
+	}
+
+	/* determine the most recent watchdog or rx_timestamp event */
+	rx_event = wx->last_rx_ptp_check;
+	for (n = 0; n < wx->num_rx_queues; n++) {
+		rx_ring = wx->rx_ring[n];
+		if (time_after(rx_ring->last_rx_timestamp, rx_event))
+			rx_event = rx_ring->last_rx_timestamp;
+	}
+
+	/* only need to read the high RXSTMP register to clear the lock */
+	if (time_is_before_jiffies(rx_event + 5 * HZ)) {
+		rd32(wx, WX_PSR_1588_STMPH);
+		wx->last_rx_ptp_check = jiffies;
+
+		wx->rx_hwtstamp_cleared++;
+		dev_warn(&wx->pdev->dev, "clearing RX Timestamp hang");
+	}
+}
+
+/**
+ * wx_ptp_tx_hang - detect error case where Tx timestamp never finishes
+ * @wx: private network wx structure
+ */
+static void wx_ptp_tx_hang(struct wx *wx)
+{
+	bool timeout = time_is_before_jiffies(wx->ptp_tx_start +
+					      WX_PTP_TX_TIMEOUT);
+
+	if (!wx->ptp_tx_skb)
+		return;
+
+	if (!test_bit(WX_STATE_PTP_TX_IN_PROGRESS, wx->state))
+		return;
+
+	/* If we haven't received a timestamp within the timeout, it is
+	 * reasonable to assume that it will never occur, so we can unlock the
+	 * timestamp bit when this occurs.
+	 */
+	if (timeout) {
+		wx_ptp_clear_tx_timestamp(wx);
+		wx->tx_hwtstamp_timeouts++;
+		dev_warn(&wx->pdev->dev, "clearing Tx timestamp hang\n");
+	}
+}
+
+static long wx_ptp_do_aux_work(struct ptp_clock_info *ptp)
+{
+	struct wx *wx = container_of(ptp, struct wx, ptp_caps);
+	int ts_done;
+
+	ts_done = wx_ptp_tx_hwtstamp_work(wx);
+
+	wx_ptp_overflow_check(wx);
+	if (unlikely(test_bit(WX_FLAG_RX_HWTSTAMP_IN_REGISTER,
+			      wx->flags)))
+		wx_ptp_rx_hang(wx);
+	wx_ptp_tx_hang(wx);
+
+	return ts_done ? 1 : HZ;
+}
+
+static u64 wx_ptp_trigger_calc(struct wx *wx)
+{
+	struct cyclecounter *cc = &wx->hw_cc;
+	unsigned long flags;
+	u64 ns = 0;
+	u32 rem;
+
+	/* Read the current clock time, and save the cycle counter value */
+	write_seqlock_irqsave(&wx->hw_tc_lock, flags);
+	ns = timecounter_read(&wx->hw_tc);
+	wx->pps_edge_start = wx->hw_tc.cycle_last;
+	write_sequnlock_irqrestore(&wx->hw_tc_lock, flags);
+	wx->pps_edge_end = wx->pps_edge_start;
+
+	/* Figure out how far past the next second we are */
+	div_u64_rem(ns, WX_NS_PER_SEC, &rem);
+
+	/* Figure out how many nanoseconds to add to round the clock edge up
+	 * to the next full second
+	 */
+	rem = (WX_NS_PER_SEC - rem);
+
+	/* Adjust the clock edge to align with the next full second. */
+	wx->pps_edge_start += div_u64(((u64)rem << cc->shift), cc->mult);
+	wx->pps_edge_end += div_u64(((u64)(rem + wx->pps_width) <<
+				     cc->shift), cc->mult);
+
+	return (ns + rem);
+}
+
+static int wx_ptp_setup_sdp(struct wx *wx)
+{
+	struct cyclecounter *cc = &wx->hw_cc;
+	u32 tsauxc;
+	u64 nsec;
+
+	if (wx->pps_width >= WX_NS_PER_SEC) {
+		wx_err(wx, "PTP pps width cannot be longer than 1s!\n");
+		return -EINVAL;
+	}
+
+	/* disable the pin first */
+	wr32ptp(wx, WX_TSC_1588_AUX_CTL, 0);
+	WX_WRITE_FLUSH(wx);
+
+	if (!test_bit(WX_FLAG_PTP_PPS_ENABLED, wx->flags)) {
+		if (wx->pps_enabled) {
+			wx->pps_enabled = false;
+			wx_set_pps(wx, false, 0, 0);
+		}
+		return 0;
+	}
+
+	wx->pps_enabled = true;
+	nsec = wx_ptp_trigger_calc(wx);
+	wx_set_pps(wx, wx->pps_enabled, nsec, wx->pps_edge_start);
+
+	tsauxc = WX_TSC_1588_AUX_CTL_PLSG | WX_TSC_1588_AUX_CTL_EN_TT0 |
+		WX_TSC_1588_AUX_CTL_EN_TT1 | WX_TSC_1588_AUX_CTL_EN_TS0;
+	wr32ptp(wx, WX_TSC_1588_TRGT_L(0), (u32)wx->pps_edge_start);
+	wr32ptp(wx, WX_TSC_1588_TRGT_H(0), (u32)(wx->pps_edge_start >> 32));
+	wr32ptp(wx, WX_TSC_1588_TRGT_L(1), (u32)wx->pps_edge_end);
+	wr32ptp(wx, WX_TSC_1588_TRGT_H(1), (u32)(wx->pps_edge_end >> 32));
+	wr32ptp(wx, WX_TSC_1588_SDP(0),
+		WX_TSC_1588_SDP_FUN_SEL_TT0 | WX_TSC_1588_SDP_OUT_LEVEL_H);
+	wr32ptp(wx, WX_TSC_1588_SDP(1), WX_TSC_1588_SDP_FUN_SEL_TS0);
+	wr32ptp(wx, WX_TSC_1588_AUX_CTL, tsauxc);
+	wr32ptp(wx, WX_TSC_1588_INT_EN, WX_TSC_1588_INT_EN_TT1);
+	WX_WRITE_FLUSH(wx);
+
+	/* Adjust the clock edge to align with the next full second. */
+	wx->sec_to_cc = div_u64(((u64)WX_NS_PER_SEC << cc->shift), cc->mult);
+
+	return 0;
+}
+
+static int wx_ptp_feature_enable(struct ptp_clock_info *ptp,
+				 struct ptp_clock_request *rq, int on)
+{
+	struct wx *wx = container_of(ptp, struct wx, ptp_caps);
+
+	/**
+	 * When PPS is enabled, unmask the interrupt for the ClockOut
+	 * feature, so that the interrupt handler can send the PPS
+	 * event when the clock SDP triggers. Clear mask when PPS is
+	 * disabled
+	 */
+	if (rq->type != PTP_CLK_REQ_PEROUT || !wx->ptp_setup_sdp)
+		return -EOPNOTSUPP;
+
+	/* Reject requests with unsupported flags */
+	if (rq->perout.flags & ~(PTP_PEROUT_DUTY_CYCLE |
+				 PTP_PEROUT_PHASE))
+		return -EOPNOTSUPP;
+
+	if (rq->perout.phase.sec || rq->perout.phase.nsec) {
+		wx_err(wx, "Absolute start time not supported.\n");
+		return -EINVAL;
+	}
+
+	if (rq->perout.period.sec != 1 || rq->perout.period.nsec) {
+		wx_err(wx, "Only 1pps is supported.\n");
+		return -EINVAL;
+	}
+
+	if (rq->perout.flags & PTP_PEROUT_DUTY_CYCLE) {
+		struct timespec64 ts_on;
+
+		ts_on.tv_sec = rq->perout.on.sec;
+		ts_on.tv_nsec = rq->perout.on.nsec;
+		wx->pps_width = timespec64_to_ns(&ts_on);
+	} else {
+		wx->pps_width = 120000000;
+	}
+
+	if (on)
+		set_bit(WX_FLAG_PTP_PPS_ENABLED, wx->flags);
+	else
+		clear_bit(WX_FLAG_PTP_PPS_ENABLED, wx->flags);
+
+	return wx->ptp_setup_sdp(wx);
+}
+
+void wx_ptp_check_pps_event(struct wx *wx)
+{
+	u32 tsauxc, int_status;
+
+	/* this check is necessary in case the interrupt was enabled via some
+	 * alternative means (ex. debug_fs). Better to check here than
+	 * everywhere that calls this function.
+	 */
+	if (!wx->ptp_clock)
+		return;
+
+	int_status = rd32ptp(wx, WX_TSC_1588_INT_ST);
+	if (int_status & WX_TSC_1588_INT_ST_TT1) {
+		/* disable the pin first */
+		wr32ptp(wx, WX_TSC_1588_AUX_CTL, 0);
+		WX_WRITE_FLUSH(wx);
+
+		wx_ptp_trigger_calc(wx);
+
+		tsauxc = WX_TSC_1588_AUX_CTL_PLSG | WX_TSC_1588_AUX_CTL_EN_TT0 |
+			 WX_TSC_1588_AUX_CTL_EN_TT1 | WX_TSC_1588_AUX_CTL_EN_TS0;
+		wr32ptp(wx, WX_TSC_1588_TRGT_L(0), (u32)wx->pps_edge_start);
+		wr32ptp(wx, WX_TSC_1588_TRGT_H(0), (u32)(wx->pps_edge_start >> 32));
+		wr32ptp(wx, WX_TSC_1588_TRGT_L(1), (u32)wx->pps_edge_end);
+		wr32ptp(wx, WX_TSC_1588_TRGT_H(1), (u32)(wx->pps_edge_end >> 32));
+		wr32ptp(wx, WX_TSC_1588_AUX_CTL, tsauxc);
+		WX_WRITE_FLUSH(wx);
+	}
+}
+EXPORT_SYMBOL(wx_ptp_check_pps_event);
+
+static long wx_ptp_create_clock(struct wx *wx)
+{
+	struct net_device *netdev = wx->netdev;
+	long err;
+
+	/* do nothing if we already have a clock device */
+	if (!IS_ERR_OR_NULL(wx->ptp_clock))
+		return 0;
+
+	snprintf(wx->ptp_caps.name, sizeof(wx->ptp_caps.name),
+		 "%s", netdev->name);
+	wx->ptp_caps.owner = THIS_MODULE;
+	wx->ptp_caps.n_alarm = 0;
+	wx->ptp_caps.n_ext_ts = 0;
+	wx->ptp_caps.pps = 0;
+	wx->ptp_caps.adjfine = wx_ptp_adjfine;
+	wx->ptp_caps.adjtime = wx_ptp_adjtime;
+	wx->ptp_caps.gettimex64 = wx_ptp_gettimex64;
+	wx->ptp_caps.settime64 = wx_ptp_settime64;
+	wx->ptp_caps.do_aux_work = wx_ptp_do_aux_work;
+	if (wx->mac.type == wx_mac_em) {
+		wx->ptp_caps.max_adj = 500000000;
+		wx->ptp_caps.n_per_out = 1;
+		wx->ptp_setup_sdp = wx_ptp_setup_sdp;
+		wx->ptp_caps.enable = wx_ptp_feature_enable;
+	} else {
+		wx->ptp_caps.max_adj = 250000000;
+		wx->ptp_caps.n_per_out = 0;
+		wx->ptp_setup_sdp = NULL;
+	}
+
+	wx->ptp_clock = ptp_clock_register(&wx->ptp_caps, &wx->pdev->dev);
+	if (IS_ERR(wx->ptp_clock)) {
+		err = PTR_ERR(wx->ptp_clock);
+		wx->ptp_clock = NULL;
+		wx_err(wx, "ptp clock register failed\n");
+		return err;
+	} else if (wx->ptp_clock) {
+		dev_info(&wx->pdev->dev, "registered PHC device on %s\n",
+			 netdev->name);
+	}
+
+	/* Set the default timestamp mode to disabled here. We do this in
+	 * create_clock instead of initialization, because we don't want to
+	 * override the previous settings during a suspend/resume cycle.
+	 */
+	wx->tstamp_config.rx_filter = HWTSTAMP_FILTER_NONE;
+	wx->tstamp_config.tx_type = HWTSTAMP_TX_OFF;
+
+	return 0;
+}
+
+static int wx_ptp_set_timestamp_mode(struct wx *wx,
+				     struct kernel_hwtstamp_config *config)
+{
+	u32 tsync_tx_ctl = WX_TSC_1588_CTL_ENABLED;
+	u32 tsync_rx_ctl = WX_PSR_1588_CTL_ENABLED;
+	DECLARE_BITMAP(flags, WX_PF_FLAGS_NBITS);
+	u32 tsync_rx_mtrl = PTP_EV_PORT << 16;
+	bool is_l2 = false;
+	u32 regval;
+
+	memcpy(flags, wx->flags, sizeof(wx->flags));
+
+	switch (config->tx_type) {
+	case HWTSTAMP_TX_OFF:
+		tsync_tx_ctl = 0;
+		break;
+	case HWTSTAMP_TX_ON:
+		break;
+	default:
+		return -ERANGE;
+	}
+
+	switch (config->rx_filter) {
+	case HWTSTAMP_FILTER_NONE:
+		tsync_rx_ctl = 0;
+		tsync_rx_mtrl = 0;
+		clear_bit(WX_FLAG_RX_HWTSTAMP_ENABLED, flags);
+		clear_bit(WX_FLAG_RX_HWTSTAMP_IN_REGISTER, flags);
+		break;
+	case HWTSTAMP_FILTER_PTP_V1_L4_SYNC:
+		tsync_rx_ctl |= WX_PSR_1588_CTL_TYPE_L4_V1;
+		tsync_rx_mtrl |= WX_PSR_1588_MSG_V1_SYNC;
+		set_bit(WX_FLAG_RX_HWTSTAMP_ENABLED, flags);
+		set_bit(WX_FLAG_RX_HWTSTAMP_IN_REGISTER, flags);
+		break;
+	case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ:
+		tsync_rx_ctl |= WX_PSR_1588_CTL_TYPE_L4_V1;
+		tsync_rx_mtrl |= WX_PSR_1588_MSG_V1_DELAY_REQ;
+		set_bit(WX_FLAG_RX_HWTSTAMP_ENABLED, flags);
+		set_bit(WX_FLAG_RX_HWTSTAMP_IN_REGISTER, flags);
+		break;
+	case HWTSTAMP_FILTER_PTP_V2_EVENT:
+	case HWTSTAMP_FILTER_PTP_V2_L2_EVENT:
+	case HWTSTAMP_FILTER_PTP_V2_L4_EVENT:
+	case HWTSTAMP_FILTER_PTP_V2_SYNC:
+	case HWTSTAMP_FILTER_PTP_V2_L2_SYNC:
+	case HWTSTAMP_FILTER_PTP_V2_L4_SYNC:
+	case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ:
+	case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ:
+	case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ:
+		tsync_rx_ctl |= WX_PSR_1588_CTL_TYPE_EVENT_V2;
+		is_l2 = true;
+		config->rx_filter = HWTSTAMP_FILTER_PTP_V2_EVENT;
+		set_bit(WX_FLAG_RX_HWTSTAMP_ENABLED, flags);
+		set_bit(WX_FLAG_RX_HWTSTAMP_IN_REGISTER, flags);
+		break;
+	default:
+		/* register PSR_1588_MSG must be set in order to do V1 packets,
+		 * therefore it is not possible to time stamp both V1 Sync and
+		 * Delay_Req messages unless hardware supports timestamping all
+		 * packets => return error
+		 */
+		config->rx_filter = HWTSTAMP_FILTER_NONE;
+		return -ERANGE;
+	}
+
+	/* define ethertype filter for timestamping L2 packets */
+	if (is_l2)
+		wr32(wx, WX_PSR_ETYPE_SWC(WX_PSR_ETYPE_SWC_FILTER_1588),
+		     (WX_PSR_ETYPE_SWC_FILTER_EN | /* enable filter */
+		      WX_PSR_ETYPE_SWC_1588 | /* enable timestamping */
+		      ETH_P_1588)); /* 1588 eth protocol type */
+	else
+		wr32(wx, WX_PSR_ETYPE_SWC(WX_PSR_ETYPE_SWC_FILTER_1588), 0);
+
+	/* enable/disable TX */
+	regval = rd32ptp(wx, WX_TSC_1588_CTL);
+	regval &= ~WX_TSC_1588_CTL_ENABLED;
+	regval |= tsync_tx_ctl;
+	wr32ptp(wx, WX_TSC_1588_CTL, regval);
+
+	/* enable/disable RX */
+	regval = rd32(wx, WX_PSR_1588_CTL);
+	regval &= ~(WX_PSR_1588_CTL_ENABLED | WX_PSR_1588_CTL_TYPE_MASK);
+	regval |= tsync_rx_ctl;
+	wr32(wx, WX_PSR_1588_CTL, regval);
+
+	/* define which PTP packets are time stamped */
+	wr32(wx, WX_PSR_1588_MSG, tsync_rx_mtrl);
+
+	WX_WRITE_FLUSH(wx);
+
+	/* configure adapter flags only when HW is actually configured */
+	memcpy(wx->flags, flags, sizeof(wx->flags));
+
+	/* clear TX/RX timestamp state, just to be sure */
+	wx_ptp_clear_tx_timestamp(wx);
+	rd32(wx, WX_PSR_1588_STMPH);
+
+	return 0;
+}
+
+static u64 wx_ptp_read(const struct cyclecounter *hw_cc)
+{
+	struct wx *wx = container_of(hw_cc, struct wx, hw_cc);
+
+	return wx_ptp_readtime(wx, NULL);
+}
+
+static void wx_ptp_link_speed_adjust(struct wx *wx, u32 *shift, u32 *incval)
+{
+	if (wx->mac.type == wx_mac_em) {
+		*shift = WX_INCVAL_SHIFT_EM;
+		*incval = WX_INCVAL_EM;
+		return;
+	}
+
+	switch (wx->speed) {
+	case SPEED_10:
+		*shift = WX_INCVAL_SHIFT_10;
+		*incval = WX_INCVAL_10;
+		break;
+	case SPEED_100:
+		*shift = WX_INCVAL_SHIFT_100;
+		*incval = WX_INCVAL_100;
+		break;
+	case SPEED_1000:
+		*shift = WX_INCVAL_SHIFT_1GB;
+		*incval = WX_INCVAL_1GB;
+		break;
+	case SPEED_10000:
+	default:
+		*shift = WX_INCVAL_SHIFT_10GB;
+		*incval = WX_INCVAL_10GB;
+		break;
+	}
+}
+
+/**
+ * wx_ptp_reset_cyclecounter - create the cycle counter from hw
+ * @wx: pointer to the wx structure
+ *
+ * This function should be called to set the proper values for the TSC_1588_INC
+ * register and tell the cyclecounter structure what the tick rate of SYSTIME
+ * is. It does not directly modify SYSTIME registers or the timecounter
+ * structure. It should be called whenever a new TSC_1588_INC value is
+ * necessary, such as during initialization or when the link speed changes.
+ */
+void wx_ptp_reset_cyclecounter(struct wx *wx)
+{
+	u32 incval = 0, mask = 0;
+	struct cyclecounter cc;
+	unsigned long flags;
+
+	/* For some of the boards below this mask is technically incorrect.
+	 * The timestamp mask overflows at approximately 61bits. However the
+	 * particular hardware does not overflow on an even bitmask value.
+	 * Instead, it overflows due to conversion of upper 32bits billions of
+	 * cycles. Timecounters are not really intended for this purpose so
+	 * they do not properly function if the overflow point isn't 2^N-1.
+	 * However, the actual SYSTIME values in question take ~138 years to
+	 * overflow. In practice this means they won't actually overflow. A
+	 * proper fix to this problem would require modification of the
+	 * timecounter delta calculations.
+	 */
+	cc.mask = CLOCKSOURCE_MASK(64);
+	cc.mult = 1;
+	cc.shift = 0;
+
+	cc.read = wx_ptp_read;
+	wx_ptp_link_speed_adjust(wx, &cc.shift, &incval);
+
+	/* update the base incval used to calculate frequency adjustment */
+	WRITE_ONCE(wx->base_incval, incval);
+
+	mask = (wx->mac.type == wx_mac_em) ? 0x7FFFFFF : 0xFFFFFF;
+	incval &= mask;
+	if (wx->mac.type != wx_mac_em)
+		incval |= 2 << 24;
+	wr32ptp(wx, WX_TSC_1588_INC, incval);
+
+	smp_mb(); /* Force the above update. */
+
+	/* need lock to prevent incorrect read while modifying cyclecounter */
+	write_seqlock_irqsave(&wx->hw_tc_lock, flags);
+	memcpy(&wx->hw_cc, &cc, sizeof(wx->hw_cc));
+	write_sequnlock_irqrestore(&wx->hw_tc_lock, flags);
+}
+EXPORT_SYMBOL(wx_ptp_reset_cyclecounter);
+
+void wx_ptp_reset(struct wx *wx)
+{
+	unsigned long flags;
+
+	/* reset the hardware timestamping mode */
+	wx_ptp_set_timestamp_mode(wx, &wx->tstamp_config);
+	wx_ptp_reset_cyclecounter(wx);
+
+	wr32ptp(wx, WX_TSC_1588_SYSTIML, 0);
+	wr32ptp(wx, WX_TSC_1588_SYSTIMH, 0);
+	WX_WRITE_FLUSH(wx);
+
+	write_seqlock_irqsave(&wx->hw_tc_lock, flags);
+	timecounter_init(&wx->hw_tc, &wx->hw_cc,
+			 ktime_to_ns(ktime_get_real()));
+	write_sequnlock_irqrestore(&wx->hw_tc_lock, flags);
+
+	wx->last_overflow_check = jiffies;
+	ptp_schedule_worker(wx->ptp_clock, HZ);
+
+	/* Now that the shift has been calculated and the systime
+	 * registers reset, (re-)enable the Clock out feature
+	 */
+	if (wx->ptp_setup_sdp)
+		wx->ptp_setup_sdp(wx);
+}
+EXPORT_SYMBOL(wx_ptp_reset);
+
+void wx_ptp_init(struct wx *wx)
+{
+	/* Initialize the seqlock_t first, since the user might call the clock
+	 * functions any time after we've initialized the ptp clock device.
+	 */
+	seqlock_init(&wx->hw_tc_lock);
+
+	/* obtain a ptp clock device, or re-use an existing device */
+	if (wx_ptp_create_clock(wx))
+		return;
+
+	wx->tx_hwtstamp_pkts = 0;
+	wx->tx_hwtstamp_timeouts = 0;
+	wx->tx_hwtstamp_skipped = 0;
+	wx->tx_hwtstamp_errors = 0;
+	wx->rx_hwtstamp_cleared = 0;
+	/* reset the ptp related hardware bits */
+	wx_ptp_reset(wx);
+
+	/* enter the WX_STATE_PTP_RUNNING state */
+	set_bit(WX_STATE_PTP_RUNNING, wx->state);
+}
+EXPORT_SYMBOL(wx_ptp_init);
+
+/**
+ * wx_ptp_suspend - stop ptp work items
+ * @wx: pointer to wx struct
+ *
+ * This function suspends ptp activity, and prevents more work from being
+ * generated, but does not destroy the clock device.
+ */
+void wx_ptp_suspend(struct wx *wx)
+{
+	/* leave the WX_STATE_PTP_RUNNING STATE */
+	if (!test_and_clear_bit(WX_STATE_PTP_RUNNING, wx->state))
+		return;
+
+	clear_bit(WX_FLAG_PTP_PPS_ENABLED, wx->flags);
+	if (wx->ptp_setup_sdp)
+		wx->ptp_setup_sdp(wx);
+
+	wx_ptp_clear_tx_timestamp(wx);
+}
+EXPORT_SYMBOL(wx_ptp_suspend);
+
+/**
+ * wx_ptp_stop - destroy the ptp_clock device
+ * @wx: pointer to wx struct
+ *
+ * Completely destroy the ptp_clock device, and disable all PTP related
+ * features. Intended to be run when the device is being closed.
+ */
+void wx_ptp_stop(struct wx *wx)
+{
+	/* first, suspend ptp activity */
+	wx_ptp_suspend(wx);
+
+	/* now destroy the ptp clock device */
+	if (wx->ptp_clock) {
+		ptp_clock_unregister(wx->ptp_clock);
+		wx->ptp_clock = NULL;
+		dev_info(&wx->pdev->dev, "removed PHC on %s\n", wx->netdev->name);
+	}
+}
+EXPORT_SYMBOL(wx_ptp_stop);
+
+/**
+ * wx_ptp_rx_hwtstamp - utility function which checks for RX time stamp
+ * @wx: pointer to wx struct
+ * @skb: particular skb to send timestamp with
+ *
+ * if the timestamp is valid, we convert it into the timecounter ns
+ * value, then store that result into the shhwtstamps structure which
+ * is passed up the network stack
+ */
+void wx_ptp_rx_hwtstamp(struct wx *wx, struct sk_buff *skb)
+{
+	u64 regval = 0;
+	u32 tsyncrxctl;
+
+	/* Read the tsyncrxctl register afterwards in order to prevent taking an
+	 * I/O hit on every packet.
+	 */
+	tsyncrxctl = rd32(wx, WX_PSR_1588_CTL);
+	if (!(tsyncrxctl & WX_PSR_1588_CTL_VALID))
+		return;
+
+	regval |= (u64)rd32(wx, WX_PSR_1588_STMPL);
+	regval |= (u64)rd32(wx, WX_PSR_1588_STMPH) << 32;
+
+	wx_ptp_convert_to_hwtstamp(wx, skb_hwtstamps(skb), regval);
+}
+
+int wx_hwtstamp_get(struct net_device *dev,
+		    struct kernel_hwtstamp_config *cfg)
+{
+	struct wx *wx = netdev_priv(dev);
+
+	if (!netif_running(dev))
+		return -EINVAL;
+
+	*cfg = wx->tstamp_config;
+
+	return 0;
+}
+EXPORT_SYMBOL(wx_hwtstamp_get);
+
+int wx_hwtstamp_set(struct net_device *dev,
+		    struct kernel_hwtstamp_config *cfg,
+		    struct netlink_ext_ack *extack)
+{
+	struct wx *wx = netdev_priv(dev);
+	int err;
+
+	if (!netif_running(dev))
+		return -EINVAL;
+
+	err = wx_ptp_set_timestamp_mode(wx, cfg);
+	if (err)
+		return err;
+
+	/* save these settings for future reference */
+	memcpy(&wx->tstamp_config, cfg, sizeof(wx->tstamp_config));
+
+	return 0;
+}
+EXPORT_SYMBOL(wx_hwtstamp_set);
--- a/drivers/net/ethernet/wangxun/libwx/wx_ptp.h
+++ b/drivers/net/ethernet/wangxun/libwx/wx_ptp.h
@@ -0,0 +1,20 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/* Copyright (c) 2019 - 2025 Beijing WangXun Technology Co., Ltd. */
+
+#ifndef _WX_PTP_H_
+#define _WX_PTP_H_
+
+void wx_ptp_check_pps_event(struct wx *wx);
+void wx_ptp_reset_cyclecounter(struct wx *wx);
+void wx_ptp_reset(struct wx *wx);
+void wx_ptp_init(struct wx *wx);
+void wx_ptp_suspend(struct wx *wx);
+void wx_ptp_stop(struct wx *wx);
+void wx_ptp_rx_hwtstamp(struct wx *wx, struct sk_buff *skb);
+int wx_hwtstamp_get(struct net_device *dev,
+		    struct kernel_hwtstamp_config *cfg);
+int wx_hwtstamp_set(struct net_device *dev,
+		    struct kernel_hwtstamp_config *cfg,
+		    struct netlink_ext_ack *extack);
+
+#endif /* _WX_PTP_H_ */
--- a/drivers/net/ethernet/wangxun/libwx/wx_type.h
+++ b/drivers/net/ethernet/wangxun/libwx/wx_type.h
@@ -4,6 +4,8 @@
 #ifndef _WX_TYPE_H_
 #define _WX_TYPE_H_

+#include <linux/ptp_clock_kernel.h>
+#include <linux/timecounter.h>
 #include <linux/bitfield.h>
 #include <linux/netdevice.h>
 #include <linux/if_vlan.h>
@@ -180,6 +182,23 @@
 #define WX_PSR_VLAN_CTL              0x15088
 #define WX_PSR_VLAN_CTL_CFIEN        BIT(29)  /* bit 29 */
 #define WX_PSR_VLAN_CTL_VFE          BIT(30)  /* bit 30 */
+/* EType Queue Filter */
+#define WX_PSR_ETYPE_SWC(_i)         (0x15128 + ((_i) * 4))
+#define WX_PSR_ETYPE_SWC_FILTER_1588 3
+#define WX_PSR_ETYPE_SWC_FILTER_EN   BIT(31)
+#define WX_PSR_ETYPE_SWC_1588        BIT(30)
+/* 1588 */
+#define WX_PSR_1588_MSG                 0x15120
+#define WX_PSR_1588_MSG_V1_SYNC         FIELD_PREP(GENMASK(7, 0), 0)
+#define WX_PSR_1588_MSG_V1_DELAY_REQ    FIELD_PREP(GENMASK(7, 0), 1)
+#define WX_PSR_1588_STMPL               0x151E8
+#define WX_PSR_1588_STMPH               0x151A4
+#define WX_PSR_1588_CTL                 0x15188
+#define WX_PSR_1588_CTL_ENABLED         BIT(4)
+#define WX_PSR_1588_CTL_TYPE_MASK       GENMASK(3, 1)
+#define WX_PSR_1588_CTL_TYPE_L4_V1      FIELD_PREP(GENMASK(3, 1), 1)
+#define WX_PSR_1588_CTL_TYPE_EVENT_V2   FIELD_PREP(GENMASK(3, 1), 5)
+#define WX_PSR_1588_CTL_VALID           BIT(0)
 /* mcasst/ucast overflow tbl */
 #define WX_PSR_MC_TBL(_i)            (0x15200  + ((_i) * 4))
 #define WX_PSR_UC_TBL(_i)            (0x15400 + ((_i) * 4))
@@ -253,6 +272,32 @@
 #define WX_TSC_ST_SECTX_RDY          BIT(0)
 #define WX_TSC_BUF_AE                0x1D00C
 #define WX_TSC_BUF_AE_THR            GENMASK(9, 0)
+/* 1588 */
+#define WX_TSC_1588_CTL              0x11F00
+#define WX_TSC_1588_CTL_ENABLED      BIT(4)
+#define WX_TSC_1588_CTL_VALID        BIT(0)
+#define WX_TSC_1588_STMPL            0x11F04
+#define WX_TSC_1588_STMPH            0x11F08
+#define WX_TSC_1588_SYSTIML          0x11F0C
+#define WX_TSC_1588_SYSTIMH          0x11F10
+#define WX_TSC_1588_INC              0x11F14
+#define WX_TSC_1588_INT_ST           0x11F20
+#define WX_TSC_1588_INT_ST_TT1       BIT(5)
+#define WX_TSC_1588_INT_EN           0x11F24
+#define WX_TSC_1588_INT_EN_TT1       BIT(5)
+#define WX_TSC_1588_AUX_CTL          0x11F28
+#define WX_TSC_1588_AUX_CTL_EN_TS0   BIT(8)
+#define WX_TSC_1588_AUX_CTL_EN_TT1   BIT(2)
+#define WX_TSC_1588_AUX_CTL_PLSG     BIT(1)
+#define WX_TSC_1588_AUX_CTL_EN_TT0   BIT(0)
+#define WX_TSC_1588_TRGT_L(i)        (0x11F2C + ((i) * 8)) /* [0,1] */
+#define WX_TSC_1588_TRGT_H(i)        (0x11F30 + ((i) * 8)) /* [0,1] */
+#define WX_TSC_1588_SDP(i)           (0x11F5C + ((i) * 4)) /* [0,3] */
+#define WX_TSC_1588_SDP_OUT_LEVEL_H  FIELD_PREP(BIT(4), 0)
+#define WX_TSC_1588_SDP_OUT_LEVEL_L  FIELD_PREP(BIT(4), 1)
+#define WX_TSC_1588_SDP_FUN_SEL_MASK GENMASK(2, 0)
+#define WX_TSC_1588_SDP_FUN_SEL_TT0  FIELD_PREP(WX_TSC_1588_SDP_FUN_SEL_MASK, 1)
+#define WX_TSC_1588_SDP_FUN_SEL_TS0  FIELD_PREP(WX_TSC_1588_SDP_FUN_SEL_MASK, 5)

 /************************************** MNG ********************************/
 #define WX_MNG_SWFW_SYNC             0x1E008
@@ -382,6 +427,8 @@ enum WX_MSCA_CMD_value {
 #define FW_CEM_CMD_RESERVED          0X0
 #define FW_CEM_MAX_RETRIES           3
 #define FW_CEM_RESP_STATUS_SUCCESS   0x1
+#define FW_PPS_SET_CMD               0xF6
+#define FW_PPS_SET_LEN               0x14

 #define WX_SW_REGION_PTR             0x1C

@@ -460,6 +507,7 @@ enum WX_MSCA_CMD_value {
 #define WX_RXD_STAT_L4CS             BIT(7) /* L4 xsum calculated */
 #define WX_RXD_STAT_IPCS             BIT(8) /* IP xsum calculated */
 #define WX_RXD_STAT_OUTERIPCS        BIT(10) /* Cloud IP xsum calculated*/
+#define WX_RXD_STAT_TS               BIT(14) /* IEEE1588 Time Stamp */

 #define WX_RXD_ERR_OUTERIPER         BIT(26) /* CRC IP Header error */
 #define WX_RXD_ERR_RXE               BIT(29) /* Any MAC Error */
@@ -701,6 +749,15 @@ struct wx_hic_reset {
 	u16 reset_type;
 };

+struct wx_hic_set_pps {
+	struct wx_hic_hdr hdr;
+	u8 lan_id;
+	u8 enable;
+	u16 pad2;
+	u64 nsec;
+	u64 cycles;
+};
+
 /* Bus parameters */
 struct wx_bus_info {
 	u8 func;
@@ -863,6 +920,7 @@ struct wx_tx_context_desc {
 */
 struct wx_tx_buffer {
 	union wx_tx_desc *next_to_watch;
+	unsigned long time_stamp;
 	struct sk_buff *skb;
 	unsigned int bytecount;
 	unsigned short gso_segs;
@@ -924,6 +982,7 @@ struct wx_ring {
 	unsigned int size;              /* length in bytes */

 	u16 count;                      /* amount of descriptors */
+	unsigned long last_rx_timestamp;

 	u8 queue_index; /* needed for multiqueue queue management */
 	u8 reg_idx;                     /* holds the special value that gets
@@ -1026,6 +1085,8 @@ struct wx_hw_stats {

 enum wx_state {
 	WX_STATE_RESETTING,
+	WX_STATE_PTP_RUNNING,
+	WX_STATE_PTP_TX_IN_PROGRESS,
 	WX_STATE_NBITS,		/* must be last */
 };

@@ -1033,6 +1094,9 @@ enum wx_pf_flags {
 	WX_FLAG_FDIR_CAPABLE,
 	WX_FLAG_FDIR_HASH,
 	WX_FLAG_FDIR_PERFECT,
+	WX_FLAG_RX_HWTSTAMP_ENABLED,
+	WX_FLAG_RX_HWTSTAMP_IN_REGISTER,
+	WX_FLAG_PTP_PPS_ENABLED,
 	WX_PF_FLAGS_NBITS               /* must be last */
 };

@@ -1133,6 +1197,29 @@ struct wx {
 	void (*atr)(struct wx_ring *ring, struct wx_tx_buffer *first, u8 ptype);
 	void (*configure_fdir)(struct wx *wx);
 	void (*do_reset)(struct net_device *netdev);
+	int (*ptp_setup_sdp)(struct wx *wx);
+
+	bool pps_enabled;
+	u64 pps_width;
+	u64 pps_edge_start;
+	u64 pps_edge_end;
+	u64 sec_to_cc;
+	u32 base_incval;
+	u32 tx_hwtstamp_pkts;
+	u32 tx_hwtstamp_timeouts;
+	u32 tx_hwtstamp_skipped;
+	u32 tx_hwtstamp_errors;
+	u32 rx_hwtstamp_cleared;
+	unsigned long last_overflow_check;
+	unsigned long last_rx_ptp_check;
+	unsigned long ptp_tx_start;
+	seqlock_t hw_tc_lock; /* seqlock for ptp */
+	struct cyclecounter hw_cc;
+	struct timecounter hw_tc;
+	struct ptp_clock *ptp_clock;
+	struct ptp_clock_info ptp_caps;
+	struct kernel_hwtstamp_config tstamp_config;
+	struct sk_buff *ptp_tx_skb;
 };

 #define WX_INTR_ALL (~0ULL)
@@ -1177,6 +1264,24 @@ rd64(struct wx *wx, u32 reg)
 	return (lsb | msb << 32);
 }

+static inline u32
+rd32ptp(struct wx *wx, u32 reg)
+{
+	if (wx->mac.type == wx_mac_em)
+		return rd32(wx, reg);
+
+	return rd32(wx, reg + 0xB500);
+}
+
+static inline void
+wr32ptp(struct wx *wx, u32 reg, u32 value)
+{
+	if (wx->mac.type == wx_mac_em)
+		return wr32(wx, reg, value);
+
+	return wr32(wx, reg + 0xB500, value);
+}
+
 /* On some domestic CPU platforms, sometimes IO is not synchronized with
 * flushing memory, here use readl() to flush PCI read and write.
 */
--- a/drivers/net/ethernet/wangxun/ngbe/ngbe_ethtool.c
+++ b/drivers/net/ethernet/wangxun/ngbe/ngbe_ethtool.c
@@ -138,6 +138,8 @@ static const struct ethtool_ops ngbe_ethtool_ops = {
 	.set_channels		= ngbe_set_channels,
 	.get_msglevel		= wx_get_msglevel,
 	.set_msglevel		= wx_set_msglevel,
+	.get_ts_info		= wx_get_ts_info,
+	.get_ts_stats		= wx_get_ptp_stats,
 };

 void ngbe_set_ethtool_ops(struct net_device *netdev)
--- a/drivers/net/ethernet/wangxun/ngbe/ngbe_main.c
+++ b/drivers/net/ethernet/wangxun/ngbe/ngbe_main.c
@@ -14,6 +14,7 @@
 #include "../libwx/wx_type.h"
 #include "../libwx/wx_hw.h"
 #include "../libwx/wx_lib.h"
+#include "../libwx/wx_ptp.h"
 #include "ngbe_type.h"
 #include "ngbe_mdio.h"
 #include "ngbe_hw.h"
@@ -167,7 +168,7 @@ static irqreturn_t ngbe_intr(int __always_unused irq, void *data)
 	struct wx_q_vector *q_vector;
 	struct wx *wx  = data;
 	struct pci_dev *pdev;
-	u32 eicr;
+	u32 eicr, eicr_misc;

 	q_vector = wx->q_vector[0];
 	pdev = wx->pdev;
@@ -185,6 +186,10 @@ static irqreturn_t ngbe_intr(int __always_unused irq, void *data)
 	if (!(pdev->msi_enabled))
 		wr32(wx, WX_PX_INTA, 1);

+	eicr_misc = wx_misc_isb(wx, WX_ISB_MISC);
+	if (unlikely(eicr_misc & NGBE_PX_MISC_IC_TIMESYNC))
+		wx_ptp_check_pps_event(wx);
+
 	wx->isb_mem[WX_ISB_MISC] = 0;
 	/* would disable interrupts here but it is auto disabled */
 	napi_schedule_irqoff(&q_vector->napi);
@@ -198,6 +203,12 @@ static irqreturn_t ngbe_intr(int __always_unused irq, void *data)
 static irqreturn_t ngbe_msix_other(int __always_unused irq, void *data)
 {
 	struct wx *wx = data;
+	u32 eicr;
+
+	eicr = wx_misc_isb(wx, WX_ISB_MISC);
+
+	if (unlikely(eicr & NGBE_PX_MISC_IC_TIMESYNC))
+		wx_ptp_check_pps_event(wx);

 	/* re-enable the original interrupt state, no lsc, no queues */
 	if (netif_running(wx->netdev))
@@ -317,6 +328,8 @@ void ngbe_down(struct wx *wx)
 {
 	phylink_stop(wx->phylink);
 	ngbe_disable_device(wx);
+	if (test_bit(WX_STATE_PTP_RUNNING, wx->state))
+		wx_ptp_reset(wx);
 	wx_clean_all_tx_rings(wx);
 	wx_clean_all_rx_rings(wx);
 }
@@ -379,6 +392,8 @@ static int ngbe_open(struct net_device *netdev)
 	if (err)
 		goto err_dis_phy;

+	wx_ptp_init(wx);
+
 	ngbe_up(wx);

 	return 0;
@@ -407,6 +422,7 @@ static int ngbe_close(struct net_device *netdev)
 {
 	struct wx *wx = netdev_priv(netdev);

+	wx_ptp_stop(wx);
 	ngbe_down(wx);
 	wx_free_irq(wx);
 	wx_free_isb_resources(wx);
@@ -507,6 +523,8 @@ static const struct net_device_ops ngbe_netdev_ops = {
 	.ndo_get_stats64        = wx_get_stats64,
 	.ndo_vlan_rx_add_vid    = wx_vlan_rx_add_vid,
 	.ndo_vlan_rx_kill_vid   = wx_vlan_rx_kill_vid,
+	.ndo_hwtstamp_set       = wx_hwtstamp_set,
+	.ndo_hwtstamp_get       = wx_hwtstamp_get,
 };

 /**
--- a/drivers/net/ethernet/wangxun/ngbe/ngbe_mdio.c
+++ b/drivers/net/ethernet/wangxun/ngbe/ngbe_mdio.c
@@ -7,6 +7,7 @@
 #include <linux/phy.h>

 #include "../libwx/wx_type.h"
+#include "../libwx/wx_ptp.h"
 #include "../libwx/wx_hw.h"
 #include "ngbe_type.h"
 #include "ngbe_mdio.h"
@@ -64,6 +65,11 @@ static void ngbe_mac_config(struct phylink_config *config, unsigned int mode,
 static void ngbe_mac_link_down(struct phylink_config *config,
 			       unsigned int mode, phy_interface_t interface)
 {
+	struct wx *wx = phylink_to_wx(config);
+
+	wx->speed = SPEED_UNKNOWN;
+	if (test_bit(WX_STATE_PTP_RUNNING, wx->state))
+		wx_ptp_reset_cyclecounter(wx);
 }

 static void ngbe_mac_link_up(struct phylink_config *config,
@@ -103,6 +109,11 @@ static void ngbe_mac_link_up(struct phylink_config *config,
 	wr32(wx, WX_MAC_PKT_FLT, WX_MAC_PKT_FLT_PR);
 	reg = rd32(wx, WX_MAC_WDG_TIMEOUT);
 	wr32(wx, WX_MAC_WDG_TIMEOUT, reg);
+
+	wx->speed = speed;
+	wx->last_rx_ptp_check = jiffies;
+	if (test_bit(WX_STATE_PTP_RUNNING, wx->state))
+		wx_ptp_reset_cyclecounter(wx);
 }

 static const struct phylink_mac_ops ngbe_mac_ops = {
--- a/drivers/net/ethernet/wangxun/ngbe/ngbe_type.h
+++ b/drivers/net/ethernet/wangxun/ngbe/ngbe_type.h
@@ -70,15 +70,20 @@

 /* Extended Interrupt Enable Set */
 #define NGBE_PX_MISC_IEN_DEV_RST		BIT(10)
+#define NGBE_PX_MISC_IEN_TIMESYNC		BIT(11)
 #define NGBE_PX_MISC_IEN_ETH_LK			BIT(18)
 #define NGBE_PX_MISC_IEN_INT_ERR		BIT(20)
 #define NGBE_PX_MISC_IEN_GPIO			BIT(26)
 #define NGBE_PX_MISC_IEN_MASK ( \
 				NGBE_PX_MISC_IEN_DEV_RST | \
+				NGBE_PX_MISC_IEN_TIMESYNC | \
 				NGBE_PX_MISC_IEN_ETH_LK | \
 				NGBE_PX_MISC_IEN_INT_ERR | \
 				NGBE_PX_MISC_IEN_GPIO)

+/* Extended Interrupt Cause Read */
+#define NGBE_PX_MISC_IC_TIMESYNC		BIT(11) /* time sync */
+
 #define NGBE_INTR_ALL				0x1FF
 #define NGBE_INTR_MISC				BIT(0)

--- a/drivers/net/ethernet/wangxun/txgbe/txgbe_ethtool.c
+++ b/drivers/net/ethernet/wangxun/txgbe/txgbe_ethtool.c
@@ -529,6 +529,8 @@ static const struct ethtool_ops txgbe_ethtool_ops = {
 	.set_rxnfc		= txgbe_set_rxnfc,
 	.get_msglevel		= wx_get_msglevel,
 	.set_msglevel		= wx_set_msglevel,
+	.get_ts_info		= wx_get_ts_info,
+	.get_ts_stats		= wx_get_ptp_stats,
 };

 void txgbe_set_ethtool_ops(struct net_device *netdev)
--- a/drivers/net/ethernet/wangxun/txgbe/txgbe_main.c
+++ b/drivers/net/ethernet/wangxun/txgbe/txgbe_main.c
@@ -13,6 +13,7 @@

 #include "../libwx/wx_type.h"
 #include "../libwx/wx_lib.h"
+#include "../libwx/wx_ptp.h"
 #include "../libwx/wx_hw.h"
 #include "txgbe_type.h"
 #include "txgbe_hw.h"
@@ -116,6 +117,9 @@ static void txgbe_reset(struct wx *wx)
 	memcpy(old_addr, &wx->mac_table[0].addr, netdev->addr_len);
 	wx_flush_sw_mac_table(wx);
 	wx_mac_set_default_filter(wx, old_addr);
+
+	if (test_bit(WX_STATE_PTP_RUNNING, wx->state))
+		wx_ptp_reset(wx);
 }

 static void txgbe_disable_device(struct wx *wx)
@@ -176,6 +180,7 @@ void txgbe_down(struct wx *wx)
 void txgbe_up(struct wx *wx)
 {
 	wx_configure(wx);
+	wx_ptp_init(wx);
 	txgbe_up_complete(wx);
 }

@@ -321,6 +326,8 @@ static int txgbe_open(struct net_device *netdev)
 	if (err)
 		goto err_free_irq;

+	wx_ptp_init(wx);
+
 	txgbe_up_complete(wx);

 	return 0;
@@ -344,6 +351,7 @@ static int txgbe_open(struct net_device *netdev)
 */
 static void txgbe_close_suspend(struct wx *wx)
 {
+	wx_ptp_suspend(wx);
 	txgbe_disable_device(wx);
 	wx_free_resources(wx);
 }
@@ -363,6 +371,7 @@ static int txgbe_close(struct net_device *netdev)
 {
 	struct wx *wx = netdev_priv(netdev);

+	wx_ptp_stop(wx);
 	txgbe_down(wx);
 	wx_free_irq(wx);
 	wx_free_resources(wx);
@@ -479,6 +488,8 @@ static const struct net_device_ops txgbe_netdev_ops = {
 	.ndo_get_stats64        = wx_get_stats64,
 	.ndo_vlan_rx_add_vid    = wx_vlan_rx_add_vid,
 	.ndo_vlan_rx_kill_vid   = wx_vlan_rx_kill_vid,
+	.ndo_hwtstamp_set       = wx_hwtstamp_set,
+	.ndo_hwtstamp_get       = wx_hwtstamp_get,
 };

 /**
--- a/drivers/net/ethernet/wangxun/txgbe/txgbe_phy.c
+++ b/drivers/net/ethernet/wangxun/txgbe/txgbe_phy.c
@@ -15,6 +15,7 @@

 #include "../libwx/wx_type.h"
 #include "../libwx/wx_lib.h"
+#include "../libwx/wx_ptp.h"
 #include "../libwx/wx_hw.h"
 #include "txgbe_type.h"
 #include "txgbe_phy.h"
@@ -179,6 +180,10 @@ static void txgbe_mac_link_down(struct phylink_config *config,
 	struct wx *wx = phylink_to_wx(config);

 	wr32m(wx, WX_MAC_TX_CFG, WX_MAC_TX_CFG_TE, 0);
+
+	wx->speed = SPEED_UNKNOWN;
+	if (test_bit(WX_STATE_PTP_RUNNING, wx->state))
+		wx_ptp_reset_cyclecounter(wx);
 }

 static void txgbe_mac_link_up(struct phylink_config *config,
@@ -215,6 +220,11 @@ static void txgbe_mac_link_up(struct phylink_config *config,
 	wr32(wx, WX_MAC_PKT_FLT, WX_MAC_PKT_FLT_PR);
 	wdg = rd32(wx, WX_MAC_WDG_TIMEOUT);
 	wr32(wx, WX_MAC_WDG_TIMEOUT, wdg);
+
+	wx->speed = speed;
+	wx->last_rx_ptp_check = jiffies;
+	if (test_bit(WX_STATE_PTP_RUNNING, wx->state))
+		wx_ptp_reset_cyclecounter(wx);
 }

 static int txgbe_mac_prepare(struct phylink_config *config, unsigned int mode,