eth: spacemit: Add SpacemiT K1-X ethernet driver

The SpacemiT SoC requires custom ethernet driver. Port it from the
vendor kernel [1].

[1] - https://github.com/BPI-SINOVOIP/pi-linux.git

Change-Id: I61b78924e893cd2103445e0ea876f5cbfdff42bb
Signed-off-by: Michal Wilczynski <m.wilczynski@samsung.com>

7 files changed, 4008 insertions, 0 deletions

diff --git a/drivers/net/ethernet/Kconfig b/drivers/net/ethernet/Kconfig
index 5a274b99f299..cf43c43c155c 100644
--- a/drivers/net/ethernet/Kconfig
+++ b/drivers/net/ethernet/Kconfig
@@ -192,5 +192,6 @@ source "drivers/net/ethernet/wangxun/Kconfig"
 source "drivers/net/ethernet/wiznet/Kconfig"
 source "drivers/net/ethernet/xilinx/Kconfig"
 source "drivers/net/ethernet/xircom/Kconfig"
+source "drivers/net/ethernet/spacemit/Kconfig"
 
 endif # ETHERNET
diff --git a/drivers/net/ethernet/Makefile b/drivers/net/ethernet/Makefile
index 0d872d4efcd1..f9eb31aa08ef 100644
--- a/drivers/net/ethernet/Makefile
+++ b/drivers/net/ethernet/Makefile
@@ -104,3 +104,4 @@ obj-$(CONFIG_NET_VENDOR_XILINX) += xilinx/
 obj-$(CONFIG_NET_VENDOR_XIRCOM) += xircom/
 obj-$(CONFIG_NET_VENDOR_SYNOPSYS) += synopsys/
 obj-$(CONFIG_NET_VENDOR_PENSANDO) += pensando/
+obj-$(CONFIG_NET_VENDOR_SPACEMIT) += spacemit/
diff --git a/drivers/net/ethernet/spacemit/Kconfig b/drivers/net/ethernet/spacemit/Kconfig
new file mode 100755
index 000000000000..943f94ed6737
--- /dev/null
+++ b/drivers/net/ethernet/spacemit/Kconfig
@@ -0,0 +1,24 @@
+config NET_VENDOR_SPACEMIT
+	bool "Spacemit devices"
+	default y
+	depends on ARCH_SPACEMIT
+	help
+	  If you have a network (Ethernet) chipset belonging to this class,
+	  say Y.
+
+	  Note that the answer to this question does not directly affect
+	  the kernel: saying N will just cause the configurator to skip all
+	  the questions regarding Spacemit chipsets. If you say Y, you will
+	  be asked for your specific chipset/driver in the following questions.
+
+if NET_VENDOR_SPACEMIT
+
+config K1X_EMAC
+	bool "k1-x Emac Driver"
+	depends on ARCH_SPACEMIT_K1X
+	select PHYLIB
+	help
+	  This Driver support Spacemit k1-x Ethernet MAC
+	  Say Y to enable support for the Spacemit Ethernet.
+
+endif # NET_VENDOR_SPACEMIT
diff --git a/drivers/net/ethernet/spacemit/Makefile b/drivers/net/ethernet/spacemit/Makefile
new file mode 100755
index 000000000000..cea94e5a847c
--- /dev/null
+++ b/drivers/net/ethernet/spacemit/Makefile
@@ -0,0 +1,6 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# Makefile for the Spacemit network device drivers.
+#
+
+obj-$(CONFIG_K1X_EMAC) += k1x-emac.o emac_ptp.o
diff --git a/drivers/net/ethernet/spacemit/emac_ptp.c b/drivers/net/ethernet/spacemit/emac_ptp.c
new file mode 100755
index 000000000000..fe7ced61566e
--- /dev/null
+++ b/drivers/net/ethernet/spacemit/emac_ptp.c
@@ -0,0 +1,371 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Spacemit k1x emac ptp driver
+ *
+ * Copyright (c) 2023, spacemit Corporation.
+ *
+ */
+
+#include <linux/bitops.h>
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/dma-mapping.h>
+#include <linux/etherdevice.h>
+#include <linux/ethtool.h>
+#include <linux/in.h>
+#include <linux/io.h>
+#include <linux/ip.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_gpio.h>
+#include <linux/of_net.h>
+#include <linux/of_mdio.h>
+#include <linux/of_irq.h>
+#include <linux/phy.h>
+#include <linux/platform_device.h>
+#include <linux/pm_qos.h>
+#include <linux/ptp_clock_kernel.h>
+#include <linux/timer.h>
+#include <linux/time64.h>
+#include <linux/types.h>
+#include <linux/workqueue.h>
+#include "k1x-emac.h"
+
+/* for ptp event message , udp port is 319 */
+#define DEFAULT_UDP_PORT		(0x13F)
+
+/* ptp ethernet type */
+#define DEFAULT_ETH_TYPE		(0x88F7)
+
+
+void emac_hw_timestamp_config(void __iomem *ioaddr, u32 enable, u8 rx_ptp_type, u32 ptp_msg_id)
+{
+	u32 val;
+
+	if (enable) {
+		/*
+		 * enable tx/rx timestamp and config rx ptp type
+		 */
+		val = TX_TIMESTAMP_EN | RX_TIMESTAMP_EN;
+		val |= (rx_ptp_type << RX_PTP_PKT_TYPE_OFST) & RX_PTP_PKT_TYPE_MSK;
+		writel(val, ioaddr + PTP_1588_CTRL);
+
+		/* config ptp message id */
+		writel(ptp_msg_id, ioaddr + PTP_MSG_ID);
+
+		/* config ptp ethernet type */
+		writel(DEFAULT_ETH_TYPE, ioaddr + PTP_ETH_TYPE);
+
+		/* config ptp udp port */
+		writel(DEFAULT_UDP_PORT, ioaddr + PTP_UDP_PORT);
+
+	} else
+		writel(0, ioaddr + PTP_1588_CTRL);
+}
+
+u32 emac_hw_config_systime_increment(void __iomem *ioaddr, u32 ptp_clock, u32 adj_clock)
+{
+	u32 incr_val;
+	u32 incr_period;
+	u32 val;
+	u32 period = 0, def_period = 0;
+	/*
+	 *  set system time counter resolution as ns
+	 *  if ptp clock is 50Mhz,  20ns per clock cycle,
+	 *  so increment value should be 20,
+	 *  increment period should be 1m
+	 */
+	if (ptp_clock == adj_clock) {
+		incr_val = div_u64(1000000000ULL, ptp_clock);
+		incr_period = 1;
+	} else {
+		def_period = div_u64(1000000000ULL, ptp_clock);
+		period = div_u64(1000000000ULL, adj_clock);
+		if (def_period == period)
+			return 0;
+
+		incr_period = 1;
+		incr_val = (def_period * def_period)/ period;
+	}
+
+	val = (incr_val | (incr_period << INCR_PERIOD_OFST));
+	writel(val, ioaddr + PTP_INRC_ATTR);
+
+	return 0;
+}
+
+int emac_hw_adjust_systime(void __iomem *ioaddr, u32 ns, bool is_neg)
+{
+	u32 val = 0;
+
+	/* update system time adjust low register */
+	writel(ns, ioaddr + SYS_TIME_ADJ_LOW);
+
+	/* perform system time adjust */
+	if (is_neg)
+		val |= SYS_TIME_IS_NEG;
+
+	writel(val, ioaddr + SYS_TIME_ADJ_HI);
+	return 0;
+}
+
+u64 emac_hw_get_systime(void __iomem *ioaddr)
+{
+	u64 lns;
+	u64 hns;
+
+	/* first read system time low register */
+	lns = readl(ioaddr + SYS_TIME_GET_LOW);
+	hns = readl(ioaddr + SYS_TIME_GET_HI);
+
+	return ((hns << 32) | lns);
+}
+
+u64 emac_hw_get_tx_timestamp(void __iomem *ioaddr)
+{
+	u64 lns;
+	u64 hns;
+
+	/* first read system time low register */
+	lns = readl(ioaddr + TX_TIMESTAMP_LOW);
+	hns = readl(ioaddr + TX_TIMESTAMP_HI);
+
+	return ((hns << 32) | lns);
+}
+
+u64 emac_hw_get_rx_timestamp(void __iomem *ioaddr)
+{
+	u64 lns;
+	u64 hns;
+
+	/* first read system time low register */
+	lns = readl(ioaddr + RX_TIMESTAMP_LOW);
+	hns = readl(ioaddr + RX_TIMESTAMP_HI);
+
+	return ((hns << 32) | lns);
+}
+
+int emac_hw_init_systime(void __iomem *ioaddr, u64 set_ns)
+{
+	u64 cur_ns;
+	s32 adj;
+	int neg_adj = 0;
+
+	cur_ns = emac_hw_get_systime(ioaddr);
+
+	adj = ((set_ns & SYS_TIME_LOW_MSK) - (cur_ns & SYS_TIME_LOW_MSK));
+	if (adj < 0) {
+		neg_adj = 1;
+		adj = -adj;
+	}
+	/* according to spec , set system time upper register and adjust time */
+	writel(set_ns >> 32, ioaddr + SYS_TIME_GET_HI);
+
+	emac_hw_adjust_systime(ioaddr, adj, neg_adj);
+
+	return 0;
+}
+
+struct emac_hw_ptp emac_hwptp = {
+	.config_hw_tstamping = emac_hw_timestamp_config,
+	.config_systime_increment = emac_hw_config_systime_increment,
+	.init_systime = emac_hw_init_systime,
+	.adjust_systime = emac_hw_adjust_systime,
+	.get_systime = emac_hw_get_systime,
+	.get_tx_timestamp = emac_hw_get_tx_timestamp,
+	.get_rx_timestamp = emac_hw_get_rx_timestamp,
+};
+
+/**
+ * emac_adjust_fine
+ *
+ * @ptp: pointer to ptp_clock_info structure
+ * @ppb: desired period change in parts ber billion
+ *
+ * Description: this function will adjust the frequency of hardware clock.
+ */
+static int emac_adjust_fine(struct ptp_clock_info *ptp, long scaled_ppm)
+{
+	struct emac_priv *priv =
+	    container_of(ptp, struct emac_priv, ptp_clock_ops);
+	unsigned long flags;
+	u32 diff, addend;
+	int neg_adj = 0;
+	u64 adj;
+
+	s32 ppb = scaled_ppm_to_ppb(scaled_ppm);
+
+	if (ppb < 0) {
+		neg_adj = 1;
+		ppb = -ppb;
+	}
+
+	addend = priv->ptp_clk_rate;
+	adj = addend;
+	adj *= ppb;
+
+	/*
+	 * ppb = (Fnew - F0)/F0
+	 * diff = F0 * ppb
+	 */
+
+	diff = div_u64(adj, 1000000000ULL);
+	addend = neg_adj ? (addend - diff) : (addend + diff);
+
+	spin_lock_irqsave(&priv->ptp_lock, flags);
+
+	priv->hwptp->adjust_systime(priv->iobase, diff, neg_adj);
+
+	spin_unlock_irqrestore(&priv->ptp_lock, flags);
+
+	return 0;
+}
+
+/**
+ * emac_adjust_time
+ *
+ * @ptp: pointer to ptp_clock_info structure
+ * @delta: desired change in nanoseconds
+ *
+ * Description: this function will shift/adjust the hardware clock time.
+ */
+static int emac_adjust_time(struct ptp_clock_info *ptp, s64 delta)
+{
+	struct emac_priv *priv =
+	    container_of(ptp, struct emac_priv, ptp_clock_ops);
+	unsigned long flags;
+	int neg_adj = 0;
+	u64 ns;
+
+	if (delta < 0) {
+		neg_adj = 1;
+		delta = -delta;
+	}
+
+
+	spin_lock_irqsave(&priv->ptp_lock, flags);
+	if (delta > SYS_TIME_LOW_MSK) {
+		ns = priv->hwptp->get_systime(priv->iobase);
+		ns = neg_adj ? (ns - delta) : (ns + delta);
+		emac_hw_init_systime(priv->iobase, ns);
+	} else {
+		priv->hwptp->adjust_systime(priv->iobase, delta, neg_adj);
+	}
+
+
+
+	spin_unlock_irqrestore(&priv->ptp_lock, flags);
+
+	return 0;
+}
+
+/**
+ * emac_get_time
+ *
+ * @ptp: pointer to ptp_clock_info structure
+ * @ts: pointer to hold time/result
+ *
+ * Description: this function will read the current time from the
+ * hardware clock and store it in @ts.
+ */
+static int emac_get_time(struct ptp_clock_info *ptp, struct timespec64 *ts)
+{
+	struct emac_priv *priv =
+	    container_of(ptp, struct emac_priv, ptp_clock_ops);
+	unsigned long flags;
+	u64 ns = 0;
+
+	spin_lock_irqsave(&priv->ptp_lock, flags);
+
+	ns = priv->hwptp->get_systime(priv->iobase);
+
+	spin_unlock_irqrestore(&priv->ptp_lock, flags);
+
+	*ts = ns_to_timespec64(ns);
+
+	return 0;
+}
+
+/**
+ * emac_set_time
+ *
+ * @ptp: pointer to ptp_clock_info structure
+ * @ts: time value to set
+ *
+ * Description: this function will set the current time on the
+ * hardware clock.
+ */
+static int emac_set_time(struct ptp_clock_info *ptp,
+			   const struct timespec64 *ts)
+{
+	struct emac_priv *priv =
+	    container_of(ptp, struct emac_priv, ptp_clock_ops);
+	unsigned long flags;
+	u64 set_ns = 0;
+
+	set_ns = timespec64_to_ns(ts);
+
+	spin_lock_irqsave(&priv->ptp_lock, flags);
+
+	priv->hwptp->init_systime(priv->iobase, set_ns);
+
+	spin_unlock_irqrestore(&priv->ptp_lock, flags);
+
+	return 0;
+}
+
+/* structure describing a PTP hardware clock */
+static struct ptp_clock_info emac_ptp_clock_ops = {
+	.owner = THIS_MODULE,
+	.name = "emac_ptp_clock",
+	.max_adj = 100000000,
+	.n_alarm = 0,
+	.n_ext_ts = 0,
+	.n_per_out = 0,
+	.n_pins = 0,
+	.pps = 0,
+	.adjfine = emac_adjust_fine,
+	.adjtime = emac_adjust_time,
+	.gettime64 = emac_get_time,
+	.settime64 = emac_set_time,
+};
+
+/**
+ * emac_ptp_register
+ * @priv: driver private structure
+ * Description: this function will register the ptp clock driver
+ * to kernel. It also does some house keeping work.
+ */
+void emac_ptp_register(struct emac_priv *priv)
+{
+	spin_lock_init(&priv->ptp_lock);
+	priv->ptp_clock_ops = emac_ptp_clock_ops;
+
+	priv->ptp_clock = ptp_clock_register(&priv->ptp_clock_ops,
+					     NULL);
+	if (IS_ERR(priv->ptp_clock)) {
+		netdev_err(priv->ndev, "ptp_clock_register failed\n");
+		priv->ptp_clock = NULL;
+	} else if (priv->ptp_clock)
+		netdev_info(priv->ndev, "registered PTP clock\n");
+
+	priv->hwptp = &emac_hwptp;
+}
+
+/**
+ * emac_ptp_unregister
+ * @priv: driver private structure
+ * Description: this function will remove/unregister the ptp clock driver
+ * from the kernel.
+ */
+void emac_ptp_unregister(struct emac_priv *priv)
+{
+	if (priv->ptp_clock) {
+		ptp_clock_unregister(priv->ptp_clock);
+		priv->ptp_clock = NULL;
+		pr_debug("Removed PTP HW clock successfully on %s\n",
+			 priv->ndev->name);
+	}
+	priv->hwptp = NULL;
+}
diff --git a/drivers/net/ethernet/spacemit/k1x-emac.c b/drivers/net/ethernet/spacemit/k1x-emac.c
new file mode 100755
index 000000000000..99f0ec32b98f
--- /dev/null
+++ b/drivers/net/ethernet/spacemit/k1x-emac.c
@@ -0,0 +1,2882 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * spacemit k1x emac driver
+ *
+ * Copyright (c) 2023, spacemit Corporation.
+ *
+ */
+
+#include <linux/bitops.h>
+#include <linux/clk.h>
+#include <linux/crc32.h>
+#include <linux/delay.h>
+#include <linux/dma-mapping.h>
+#include <linux/etherdevice.h>
+#include <linux/ethtool.h>
+#include <linux/dma-direct.h>
+#include <linux/in.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/iopoll.h>
+#include <linux/ip.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_gpio.h>
+#include <linux/of_net.h>
+#include <linux/of_mdio.h>
+#include <linux/of_irq.h>
+#include <linux/phy.h>
+#include <linux/phylink.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/pm.h>
+#include <linux/tcp.h>
+#include <linux/timer.h>
+#include <linux/types.h>
+#include <linux/udp.h>
+#include <linux/workqueue.h>
+#include <linux/reset.h>
+
+#ifdef CONFIG_DEBUG_FS
+#include <linux/debugfs.h>
+#include <linux/seq_file.h>
+#endif /* CONFIG_DEBUG_FS */
+
+#include "k1x-emac.h"
+
+#define DRIVER_NAME				"k1x_emac"
+
+/* k1x PMUap base */
+#define PMUA_BASE_REG		0xd4282800
+
+#define TUNING_CMD_LEN				50
+#define CLK_PHASE_CNT				256
+#define CLK_PHASE_REVERT			180
+
+#define TXCLK_PHASE_DEFAULT			0
+#define RXCLK_PHASE_DEFAULT			0
+
+#define TX_PHASE				1
+#define RX_PHASE				0
+
+#define DEFAULT_TX_THRESHOLD			(192)
+#define DEFAULT_RX_THRESHOLD			(12)
+#define DEFAULT_TX_RING_NUM			(128)
+#define DEFAULT_RX_RING_NUM			(128)
+#define DEFAULT_DMA_BURST_LEN			(1)
+#define HASH_TABLE_SIZE				(64)
+
+#define EMAC_DMA_REG_CNT			16
+#define EMAC_MAC_REG_CNT			124
+#define EMAC_REG_SPACE_SIZE			((EMAC_DMA_REG_CNT + \
+						 EMAC_MAC_REG_CNT) * 4)
+#define EMAC_ETHTOOL_STAT(x) { #x, \
+				offsetof(struct emac_hw_stats, x) / sizeof(u32) }
+
+/* strings used by ethtool */
+static const struct emac_ethtool_stats {
+	char str[ETH_GSTRING_LEN];
+	u32 offset;
+} emac_ethtool_stats[] = {
+	EMAC_ETHTOOL_STAT(tx_ok_pkts),
+	EMAC_ETHTOOL_STAT(tx_total_pkts),
+	EMAC_ETHTOOL_STAT(tx_ok_bytes),
+	EMAC_ETHTOOL_STAT(tx_err_pkts),
+	EMAC_ETHTOOL_STAT(tx_singleclsn_pkts),
+	EMAC_ETHTOOL_STAT(tx_multiclsn_pkts),
+	EMAC_ETHTOOL_STAT(tx_lateclsn_pkts),
+	EMAC_ETHTOOL_STAT(tx_excessclsn_pkts),
+	EMAC_ETHTOOL_STAT(tx_unicast_pkts),
+	EMAC_ETHTOOL_STAT(tx_multicast_pkts),
+	EMAC_ETHTOOL_STAT(tx_broadcast_pkts),
+	EMAC_ETHTOOL_STAT(tx_pause_pkts),
+	EMAC_ETHTOOL_STAT(rx_ok_pkts),
+	EMAC_ETHTOOL_STAT(rx_total_pkts),
+	EMAC_ETHTOOL_STAT(rx_crc_err_pkts),
+	EMAC_ETHTOOL_STAT(rx_align_err_pkts),
+	EMAC_ETHTOOL_STAT(rx_err_total_pkts),
+	EMAC_ETHTOOL_STAT(rx_ok_bytes),
+	EMAC_ETHTOOL_STAT(rx_total_bytes),
+	EMAC_ETHTOOL_STAT(rx_unicast_pkts),
+	EMAC_ETHTOOL_STAT(rx_multicast_pkts),
+	EMAC_ETHTOOL_STAT(rx_broadcast_pkts),
+	EMAC_ETHTOOL_STAT(rx_pause_pkts),
+	EMAC_ETHTOOL_STAT(rx_len_err_pkts),
+	EMAC_ETHTOOL_STAT(rx_len_undersize_pkts),
+	EMAC_ETHTOOL_STAT(rx_len_oversize_pkts),
+	EMAC_ETHTOOL_STAT(rx_len_fragment_pkts),
+	EMAC_ETHTOOL_STAT(rx_len_jabber_pkts),
+	EMAC_ETHTOOL_STAT(rx_64_pkts),
+	EMAC_ETHTOOL_STAT(rx_65_127_pkts),
+	EMAC_ETHTOOL_STAT(rx_128_255_pkts),
+	EMAC_ETHTOOL_STAT(rx_256_511_pkts),
+	EMAC_ETHTOOL_STAT(rx_512_1023_pkts),
+	EMAC_ETHTOOL_STAT(rx_1024_1518_pkts),
+	EMAC_ETHTOOL_STAT(rx_1519_plus_pkts),
+	EMAC_ETHTOOL_STAT(rx_drp_fifo_full_pkts),
+	EMAC_ETHTOOL_STAT(rx_truncate_fifo_full_pkts),
+};
+
+enum clk_tuning_way {
+	/* fpga clk tuning register */
+	CLK_TUNING_BY_REG,
+	/* zebu/evb rgmii delayline register */
+	CLK_TUNING_BY_DLINE,
+	/* evb rmii only revert tx/rx clock for clk tuning */
+	CLK_TUNING_BY_CLK_REVERT,
+	CLK_TUNING_MAX,
+};
+
+static int emac_open(struct net_device *ndev);
+static int emac_close(struct net_device *ndev);
+static int emac_change_mtu(struct net_device *ndev, int u32MTU);
+static void emac_tx_timeout(struct net_device *ndev, unsigned int txqueue);
+static int emac_ioctl(struct net_device *ndev, pst_ifreq pstIfReq, int u32Cmd);
+static int emac_start_xmit(struct sk_buff *skb, struct net_device *ndev);
+static void emac_clean_tx_desc_ring(struct emac_priv *priv);
+static void emac_clean_rx_desc_ring(struct emac_priv *priv);
+static void emac_configure_tx(struct emac_priv *priv);
+static void emac_configure_rx(struct emac_priv *priv);
+static int emac_tx_mem_map(struct emac_priv *priv, struct sk_buff *skb, u32 max_tx_len,	u32 frag_num);
+static int emac_tx_clean_desc(struct emac_priv *priv);
+static int emac_rx_clean_desc(struct emac_priv *priv, int budget);
+static irqreturn_t emac_interrupt_handler(int irq, void *dev_Id);
+static void emac_alloc_rx_desc_buffers(struct emac_priv *priv);
+static int emac_phy_connect(struct net_device *dev);
+static int emac_sw_init(struct emac_priv *priv);
+
+static void emac_tx_timeout_task(struct work_struct *work);
+
+void register_dump(struct emac_priv *priv)
+{
+	int i;
+	void __iomem *base = priv->iobase;
+
+	for (i = 0; i < 16; i++) {
+		pr_info("DMA:0x%x:0x%x\n",
+		       DMA_CONFIGURATION + i * 4,
+		       readl(base + DMA_CONFIGURATION + i * 4));
+	}
+	for (i = 0; i < 60; i++) {
+		pr_info("MAC:0x%x:0x%x\n",
+		       MAC_GLOBAL_CONTROL + i * 4,
+		       readl(base + MAC_GLOBAL_CONTROL + i * 4));
+	}
+}
+
+void print_pkt(unsigned char *buf, int len)
+{
+	int i = 0;
+
+	pr_debug("data len = %d byte, buf addr: 0x%lx\n",
+		 len, (unsigned long)buf);
+	for (i = 0; i < len; i = i + 8) {
+		pr_debug("0x%02x 0x%02x 0x%02x 0x%02x 0x%02x 0x%02x 0x%02x 0x%02x\n",
+			*(buf + i),
+			*(buf + i + 1),
+			*(buf + i + 2),
+			*(buf + i + 3),
+			*(buf + i + 4),
+			*(buf + i + 5),
+			*(buf + i + 6),
+			*(buf + i + 7)
+			);
+	}
+}
+
+void print_desc(unsigned char *buf, int len)
+{
+	int i;
+
+	pr_debug("descriptor len = %d byte, buf addr: 0x%lx\n",
+		 len, (unsigned long)buf);
+	for (i = 0; i < len; i = i + 4) {
+		pr_debug("0x%02x 0x%02x 0x%02x 0x%02x\n",
+			*(buf + i + 3),
+			*(buf + i + 2),
+			*(buf + i + 1),
+			*(buf + i));
+	}
+}
+
+bool emac_is_rmii(struct emac_priv *priv)
+{
+	return priv->phy_interface == PHY_INTERFACE_MODE_RMII;
+}
+
+void emac_enable_axi_single_id_mode(struct emac_priv *priv, int en)
+{
+	u32 val;
+
+	val = readl(priv->ctrl_reg);
+	if (en)
+		val |= AXI_SINGLE_ID;
+	else
+		val &= ~AXI_SINGLE_ID;
+	writel(val, priv->ctrl_reg);
+}
+
+void emac_phy_interface_config(struct emac_priv *priv)
+{
+	u32 val;
+
+	val = readl(priv->ctrl_reg);
+	if (emac_is_rmii(priv)) {
+		val &= ~PHY_INTF_RGMII;
+		if (priv->ref_clk_frm_soc)
+			val |= REF_CLK_SEL;
+		else
+			val &= ~REF_CLK_SEL;
+	} else {
+		val |= PHY_INTF_RGMII;
+		if (priv->ref_clk_frm_soc)
+			val |= RGMII_TX_CLK_SEL;
+	}
+	writel(val, priv->ctrl_reg);
+}
+
+/* Name		emac_reset_hw
+ * Arguments	priv : pointer to hardware data structure
+ * Return	Status: 0 - Success;  non-zero - Fail
+ * Description	TBDL
+ */
+int emac_reset_hw(struct emac_priv *priv)
+{
+	/* disable all the interrupts */
+	emac_wr(priv, MAC_INTERRUPT_ENABLE, 0x0000);
+	emac_wr(priv, DMA_INTERRUPT_ENABLE, 0x0000);
+
+	/* disable transmit and receive units */
+	emac_wr(priv, MAC_RECEIVE_CONTROL, 0x0000);
+	emac_wr(priv, MAC_TRANSMIT_CONTROL, 0x0000);
+
+	/* stop the DMA */
+	emac_wr(priv, DMA_CONTROL, 0x0000);
+
+	/* reset mac, statistic counters */
+	emac_wr(priv, MAC_GLOBAL_CONTROL, 0x0018);
+
+	emac_wr(priv, MAC_GLOBAL_CONTROL, 0x0000);
+	return 0;
+}
+
+/* Name		emac_init_hw
+ * Arguments	pstHWData	: pointer to hardware data structure
+ * Return	Status: 0 - Success;  non-zero - Fail
+ * Description	TBDL
+ * Assumes that the controller has previously been reset
+ * and is in apost-reset uninitialized state.
+ * Initializes the receive address registers,
+ * multicast table, and VLAN filter table.
+ * Calls routines to setup link
+ * configuration and flow control settings.
+ * Clears all on-chip counters. Leaves
+ * the transmit and receive units disabled and uninitialized.
+ */
+int emac_init_hw(struct emac_priv *priv)
+{
+	u32 val = 0;
+
+	emac_enable_axi_single_id_mode(priv, 1);
+
+	/* MAC Init
+	 * disable transmit and receive units
+	 */
+	emac_wr(priv, MAC_RECEIVE_CONTROL, 0x0000);
+	emac_wr(priv, MAC_TRANSMIT_CONTROL, 0x0000);
+
+	/* enable mac address 1 filtering */
+	emac_wr(priv, MAC_ADDRESS_CONTROL, MREGBIT_MAC_ADDRESS1_ENABLE);
+
+	/* zero initialize the multicast hash table */
+	emac_wr(priv, MAC_MULTICAST_HASH_TABLE1, 0x0);
+	emac_wr(priv, MAC_MULTICAST_HASH_TABLE2, 0x0);
+	emac_wr(priv, MAC_MULTICAST_HASH_TABLE3, 0x0);
+	emac_wr(priv, MAC_MULTICAST_HASH_TABLE4, 0x0);
+
+	emac_wr(priv, MAC_TRANSMIT_FIFO_ALMOST_FULL, 0x1f8);
+
+	emac_wr(priv, MAC_TRANSMIT_PACKET_START_THRESHOLD, priv->tx_threshold);
+
+	emac_wr(priv, MAC_RECEIVE_PACKET_START_THRESHOLD, priv->rx_threshold);
+
+	/* set emac rx mitigation frame count */
+	val = EMAC_RX_FRAMES & MREGBIT_RECEIVE_IRQ_FRAME_COUNTER_MSK;
+
+	/* set emac rx mitigation timeout */
+	val |= (EMAC_RX_COAL_TIMEOUT << MREGBIT_RECEIVE_IRQ_TIMEOUT_COUNTER_OFST) &
+		MREGBIT_RECEIVE_IRQ_TIMEOUT_COUNTER_MSK;
+
+	/* disable emac rx irq mitigation */
+	val &= ~MRGEBIT_RECEIVE_IRQ_MITIGATION_ENABLE;
+
+	emac_wr(priv, DMA_RECEIVE_IRQ_MITIGATION_CTRL, val);
+
+	/* reset dma */
+	emac_wr(priv, DMA_CONTROL, 0x0000);
+
+	emac_wr(priv, DMA_CONFIGURATION, 0x01);
+	usleep_range(9000, 10000);
+	emac_wr(priv, DMA_CONFIGURATION, 0x00);
+	usleep_range(9000, 10000);
+
+	val = 0;
+	val |= MREGBIT_STRICT_BURST;
+	val |= MREGBIT_DMA_64BIT_MODE;
+
+	if (priv->dma_burst_len)
+		val |= 1 << priv->dma_burst_len;
+	else
+		val |= MREGBIT_BURST_1WORD;
+
+	emac_wr(priv, DMA_CONFIGURATION, val);
+
+	/* if emac has ptp 1588 support, so enable PTP 1588 irq */
+	if (priv->ptp_support)
+		emac_wr(priv, PTP_1588_IRQ_EN, PTP_TX_TIMESTAMP|PTP_RX_TIMESTAMP);
+
+	return 0;
+}
+
+int emac_set_mac_addr(struct emac_priv *priv, const unsigned char *addr)
+{
+	emac_wr(priv, MAC_ADDRESS1_HIGH, ((addr[1] << 8) | addr[0]));
+	emac_wr(priv, MAC_ADDRESS1_MED, ((addr[3] << 8) | addr[2]));
+	emac_wr(priv, MAC_ADDRESS1_LOW, ((addr[5] << 8) | addr[4]));
+
+	return 0;
+}
+
+void emac_dma_start_transmit(struct emac_priv *priv)
+{
+	emac_wr(priv, DMA_TRANSMIT_POLL_DEMAND, 0xFF);
+}
+
+void emac_enable_interrupt(struct emac_priv *priv)
+{
+	u32 val;
+	val = emac_rd(priv, DMA_INTERRUPT_ENABLE);
+	val |= MREGBIT_TRANSMIT_TRANSFER_DONE_INTR_ENABLE;
+	val |= MREGBIT_RECEIVE_TRANSFER_DONE_INTR_ENABLE;
+	emac_wr(priv, DMA_INTERRUPT_ENABLE, val);
+}
+
+void emac_disable_interrupt(struct emac_priv *priv)
+{
+	u32 val;
+	val = emac_rd(priv, DMA_INTERRUPT_ENABLE);
+	val &= ~MREGBIT_TRANSMIT_TRANSFER_DONE_INTR_ENABLE;
+	val &= ~MREGBIT_RECEIVE_TRANSFER_DONE_INTR_ENABLE;
+	emac_wr(priv, DMA_INTERRUPT_ENABLE, val);
+}
+
+static inline u32 emac_tx_avail(struct emac_priv *priv)
+{
+	struct emac_desc_ring *tx_ring = &priv->tx_ring;
+	u32 avail;
+
+	if (tx_ring->tail > tx_ring->head)
+		avail = tx_ring->tail - tx_ring->head - 1;
+	else
+		avail = tx_ring->total_cnt - tx_ring->head + tx_ring->tail - 1;
+
+	return avail;
+}
+
+static void emac_tx_coal_timer_resched(struct emac_priv *priv)
+{
+	mod_timer(&priv->txtimer,
+		  jiffies + usecs_to_jiffies(priv->tx_coal_timeout));
+}
+
+static void emac_tx_coal_timer(struct timer_list *t)
+{
+	struct emac_priv *priv = from_timer(priv, t, txtimer);
+
+	if (likely(napi_schedule_prep(&priv->napi)))
+		__napi_schedule(&priv->napi);
+}
+
+static int emac_tx_coal(struct emac_priv *priv, u32 pkt_num)
+{
+	/* Manage tx mitigation */
+	priv->tx_count_frames += pkt_num;
+	if (likely(priv->tx_coal_frames > priv->tx_count_frames)) {
+		emac_tx_coal_timer_resched(priv);
+		return false;
+	} else {
+		priv->tx_count_frames = 0;
+		return true;
+	}
+}
+
+/* Name		emac_sw_init
+ * Arguments	priv	: pointer to driver private data structure
+ * Return	Status: 0 - Success;  non-zero - Fail
+ * Description	Reads PCI space configuration information and
+ *		initializes the variables with
+ *		their default values
+ */
+static int emac_sw_init(struct emac_priv *priv)
+{
+	priv->dma_buf_sz = EMAC_DEFAULT_BUFSIZE;
+
+	priv->tx_ring.total_cnt = priv->tx_ring_num;
+	priv->rx_ring.total_cnt = priv->rx_ring_num;
+
+	spin_lock_init(&priv->spStatsLock);
+	spin_lock_init(&priv->spTxLock);
+	spin_lock_init(&priv->hw_stats->stats_lock);
+
+	INIT_WORK(&priv->tx_timeout_task, emac_tx_timeout_task);
+
+	priv->tx_coal_frames = EMAC_TX_FRAMES;
+	priv->tx_coal_timeout = EMAC_TX_COAL_TIMEOUT;
+
+	timer_setup(&priv->txtimer, emac_tx_coal_timer, 0);
+
+	return 0;
+}
+
+/* emac_get_tx_hwtstamp - get HW TX timestamps
+ * @priv: driver private structure
+ * @skb : the socket buffer
+ * Description :
+ * This function will read timestamp from the register & pass it to stack.
+ * and also perform some sanity checks.
+ */
+static void emac_get_tx_hwtstamp(struct emac_priv *priv,
+				 struct sk_buff *skb)
+{
+	struct skb_shared_hwtstamps shhwtstamp;
+	u64 ns;
+
+	if (!priv->hwts_tx_en)
+		return;
+
+	/* exit if skb doesn't support hw tstamp */
+	if (likely(!skb || !(skb_shinfo(skb)->tx_flags & SKBTX_IN_PROGRESS)))
+		return;
+
+	/* get the valid tstamp */
+	ns = priv->hwptp->get_tx_timestamp(priv->iobase);
+
+	memset(&shhwtstamp, 0, sizeof(struct skb_shared_hwtstamps));
+	shhwtstamp.hwtstamp = ns_to_ktime(ns);
+	wmb();
+	netdev_dbg(priv->ndev, "get valid TX hw timestamp %llu\n", ns);
+	/* pass tstamp to stack */
+	skb_tstamp_tx(skb, &shhwtstamp);
+
+	return;
+}
+
+/* emac_get_rx_hwtstamp - get HW RX timestamps
+ * @priv: driver private structure
+ * @p : descriptor pointer
+ * @skb : the socket buffer
+ * Description :
+ * This function will read received packet's timestamp from the descriptor
+ * and pass it to stack. It also perform some sanity checks.
+ */
+static void emac_get_rx_hwtstamp(struct emac_priv *priv, struct emac_rx_desc *p,
+				 struct sk_buff *skb)
+{
+	struct skb_shared_hwtstamps *shhwtstamp = NULL;
+	u64 ns;
+
+	if (!priv->hwts_rx_en)
+		return;
+
+	/* Check if timestamp is available */
+	if (p->ptp_pkt && p->rx_timestamp) {
+		ns = priv->hwptp->get_rx_timestamp(priv->iobase);
+		netdev_dbg(priv->ndev, "get valid RX hw timestamp %llu\n", ns);
+		shhwtstamp = skb_hwtstamps(skb);
+		memset(shhwtstamp, 0, sizeof(struct skb_shared_hwtstamps));
+		shhwtstamp->hwtstamp = ns_to_ktime(ns);
+	} else  {
+		netdev_dbg(priv->ndev, "cannot get RX hw timestamp\n");
+	}
+}
+
+/**
+ *  emac_hwtstamp_ioctl - control hardware timestamping.
+ *  @dev: device pointer.
+ *  @ifr: An IOCTL specific structure, that can contain a pointer to
+ *  a proprietary structure used to pass information to the driver.
+ *  Description:
+ *  This function configures the MAC to enable/disable both outgoing(TX)
+ *  and incoming(RX) packets time stamping based on user input.
+ *  Return Value:
+ *  0 on success and an appropriate -ve integer on failure.
+ */
+static int emac_hwtstamp_ioctl(struct net_device *dev, struct ifreq *ifr)
+{
+	struct emac_priv *priv = netdev_priv(dev);
+	struct hwtstamp_config config;
+	struct timespec64 now;
+	u64 ns_ptp;
+	u32 ptp_event_msg_id = 0;
+	u32 rx_ptp_type = 0;
+
+	if (!priv->ptp_support) {
+		netdev_alert(priv->ndev, "No support for HW time stamping\n");
+		priv->hwts_tx_en = 0;
+		priv->hwts_rx_en = 0;
+
+		return -EOPNOTSUPP;
+	}
+
+	if (copy_from_user(&config, ifr->ifr_data,
+			   sizeof(struct hwtstamp_config)))
+		return -EFAULT;
+
+	netdev_dbg(priv->ndev, "%s config flags:0x%x, tx_type:0x%x, rx_filter:0x%x\n",
+		   __func__, config.flags, config.tx_type, config.rx_filter);
+
+	/* reserved for future extensions */
+	if (config.flags)
+		return -EINVAL;
+
+	if (config.tx_type != HWTSTAMP_TX_OFF &&
+	    config.tx_type != HWTSTAMP_TX_ON)
+		return -ERANGE;
+
+	switch (config.rx_filter) {
+	case HWTSTAMP_FILTER_NONE:
+		/* time stamp no incoming packet at all */
+		config.rx_filter = HWTSTAMP_FILTER_NONE;
+		break;
+
+	case HWTSTAMP_FILTER_PTP_V1_L4_SYNC:
+		/* PTP v1, UDP, Sync packet */
+		config.rx_filter = HWTSTAMP_FILTER_PTP_V1_L4_SYNC;
+		/* take time stamp for SYNC messages only */
+		ptp_event_msg_id = MSG_SYNC;
+		rx_ptp_type = PTP_V1_L4_ONLY;
+		break;
+
+	case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ:
+		/* PTP v1, UDP, Delay_req packet */
+		config.rx_filter = HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ;
+		/* take time stamp for Delay_Req messages only */
+		ptp_event_msg_id = MSG_DELAY_REQ;
+		rx_ptp_type = PTP_V1_L4_ONLY;
+		break;
+
+	case HWTSTAMP_FILTER_PTP_V2_L4_SYNC:
+		/* PTP v2, UDP, Sync packet */
+		config.rx_filter = HWTSTAMP_FILTER_PTP_V2_L4_SYNC;
+		/* take time stamp for SYNC messages only */
+		ptp_event_msg_id = MSG_SYNC;
+		rx_ptp_type = PTP_V2_L2_L4;
+		break;
+
+	case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ:
+		/* PTP v2, UDP, Delay_req packet */
+		config.rx_filter = HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ;
+		/* take time stamp for Delay_Req messages only */
+		ptp_event_msg_id = MSG_DELAY_REQ;
+		rx_ptp_type = PTP_V2_L2_L4;
+		break;
+
+	case HWTSTAMP_FILTER_PTP_V2_EVENT:
+		/* PTP v2/802.AS1 any layer, any kind of event packet */
+		config.rx_filter = HWTSTAMP_FILTER_PTP_V2_EVENT;
+		ptp_event_msg_id = ALL_EVENTS;
+		rx_ptp_type = PTP_V2_L2_L4;
+		break;
+
+	case HWTSTAMP_FILTER_PTP_V2_SYNC:
+		/* PTP v2/802.AS1, any layer, Sync packet */
+		config.rx_filter = HWTSTAMP_FILTER_PTP_V2_SYNC;
+		/* take time stamp for SYNC messages only */
+		ptp_event_msg_id = MSG_SYNC;
+		rx_ptp_type = PTP_V2_L2_L4;
+		break;
+
+	case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ:
+		/* PTP v2/802.AS1, any layer, Delay_req packet */
+		config.rx_filter = HWTSTAMP_FILTER_PTP_V2_DELAY_REQ;
+		/* take time stamp for Delay_Req messages only */
+		ptp_event_msg_id = MSG_DELAY_REQ;
+		rx_ptp_type = PTP_V2_L2_L4;
+		break;
+	default:
+		return -ERANGE;
+	}
+
+	priv->hwts_rx_en = ((config.rx_filter == HWTSTAMP_FILTER_NONE) ? 0 : 1);
+	priv->hwts_tx_en = config.tx_type == HWTSTAMP_TX_ON;
+
+	if (!priv->hwts_tx_en && !priv->hwts_rx_en)
+		priv->hwptp->config_hw_tstamping(priv->iobase, 0, 0, 0);
+	else {
+
+		priv->hwptp->config_hw_tstamping(priv->iobase, 1, rx_ptp_type, ptp_event_msg_id);
+
+		/* initialize system time */
+		ktime_get_real_ts64(&now);
+		priv->hwptp->init_systime(priv->iobase, timespec64_to_ns(&now));
+
+		/* program Increment reg */
+		priv->hwptp->config_systime_increment(priv->iobase, priv->ptp_clk_rate, priv->ptp_clk_rate);
+
+		ns_ptp = priv->hwptp->get_systime(priv->iobase);
+		ktime_get_real_ts64(&now);
+		/* check the diff between ptp timer and system time */
+		if (abs(timespec64_to_ns(&now) - ns_ptp) > 5000)
+			priv->hwptp->init_systime(priv->iobase, timespec64_to_ns(&now));
+	}
+	return copy_to_user(ifr->ifr_data, &config,
+			    sizeof(struct hwtstamp_config)) ? -EFAULT : 0;
+}
+
+/* Name		emac_ioctl
+ * Arguments	pstNetdev : pointer to net_device structure
+ *		pstIfReq : pointer to interface request structure used.
+ *		u32Cmd : IOCTL command number
+ * Return	Status: 0 - Success;  non-zero - Fail
+ * Description	It is called by upper layer and
+ *		handling various task IOCTL commands.
+ */
+static int emac_ioctl(struct net_device *ndev, struct ifreq *rq, int cmd)
+{
+	int ret = -EOPNOTSUPP;
+
+	if (!netif_running(ndev))
+		return -EINVAL;
+
+	switch (cmd) {
+	case SIOCGMIIPHY:
+	case SIOCGMIIREG:
+	case SIOCSMIIREG:
+		if (!ndev->phydev)
+			return -EINVAL;
+		ret = phy_mii_ioctl(ndev->phydev, rq, cmd);
+		break;
+	case SIOCSHWTSTAMP:
+		ret = emac_hwtstamp_ioctl(ndev, rq);
+		break;
+	default:
+		break;
+	}
+
+	return ret;
+}
+
+/* Name		emac_interrupt_handler
+ * Arguments	irq : irq number for which the interrupt is fired
+ *		dev_id : pointer was passed to request_irq and same pointer is passed
+ *		back to handler
+ * Return	irqreturn_t : integer value
+ * Description	Interrupt handler routine for interrupts from target for RX packets indication.
+ */
+static irqreturn_t emac_interrupt_handler(int irq, void *dev_id)
+{
+	struct net_device *ndev = (struct net_device *)dev_id;
+	struct emac_priv *priv = netdev_priv(ndev);
+	u32 status;
+	u32 clr = 0;
+
+	/* Check if emac is up */
+	if (test_bit(EMAC_DOWN, &priv->state))
+		return IRQ_HANDLED;
+
+	/* read the status register for IRQ received */
+	status = emac_rd(priv, DMA_STATUS_IRQ);
+
+	if (status & MREGBIT_TRANSMIT_TRANSFER_DONE_IRQ) {
+		emac_disable_interrupt(priv);
+		clr |= MREGBIT_TRANSMIT_TRANSFER_DONE_IRQ;
+		napi_schedule(&priv->napi);
+	}
+
+	if (status & MREGBIT_TRANSMIT_DES_UNAVAILABLE_IRQ)
+		clr |= MREGBIT_TRANSMIT_DES_UNAVAILABLE_IRQ;
+
+	if (status & MREGBIT_TRANSMIT_DMA_STOPPED_IRQ)
+		clr |= MREGBIT_TRANSMIT_DMA_STOPPED_IRQ;
+
+	if (status & MREGBIT_RECEIVE_TRANSFER_DONE_IRQ) {
+		emac_disable_interrupt(priv);
+		clr |= MREGBIT_RECEIVE_TRANSFER_DONE_IRQ;
+		napi_schedule(&priv->napi);
+	}
+
+	if (status & MREGBIT_RECEIVE_DES_UNAVAILABLE_IRQ)
+		clr |= MREGBIT_RECEIVE_DES_UNAVAILABLE_IRQ;
+
+	if (status & MREGBIT_RECEIVE_DMA_STOPPED_IRQ)
+		clr |= MREGBIT_RECEIVE_DMA_STOPPED_IRQ;
+
+	if (status & MREGBIT_RECEIVE_MISSED_FRAME_IRQ)
+		clr |= MREGBIT_RECEIVE_MISSED_FRAME_IRQ;
+
+	emac_wr(priv, DMA_STATUS_IRQ, clr);
+
+	if (priv->ptp_support) {
+		status = emac_rd(priv, PTP_1588_IRQ_STS);
+		if ((status & PTP_TX_TIMESTAMP) || (status & PTP_RX_TIMESTAMP))
+			napi_schedule(&priv->napi);
+
+		emac_wr(priv, PTP_1588_IRQ_STS, status);
+	}
+
+	return IRQ_HANDLED;
+}
+
+/* Name		emac_configure_tx
+ * Arguments	priv : pointer to driver private data structure
+ * Return	none
+ * Description	Configures the transmit unit of the device
+ */
+static void emac_configure_tx(struct emac_priv *priv)
+{
+	u32 val;
+
+	/* set the transmit base address */
+	val = (u32)(priv->tx_ring.desc_dma_addr);
+
+	emac_wr(priv, DMA_TRANSMIT_BASE_ADDRESS, val);
+
+	/* Tx Inter Packet Gap value and enable the transmit */
+	val = emac_rd(priv, MAC_TRANSMIT_CONTROL);
+	val &= (~MREGBIT_IFG_LEN);
+	val |= MREGBIT_TRANSMIT_ENABLE;
+	val |= MREGBIT_TRANSMIT_AUTO_RETRY;
+	emac_wr(priv, MAC_TRANSMIT_CONTROL, val);
+
+	emac_wr(priv, DMA_TRANSMIT_AUTO_POLL_COUNTER, 0x00);
+
+	/* start tx dma */
+	val = emac_rd(priv, DMA_CONTROL);
+	val |= MREGBIT_START_STOP_TRANSMIT_DMA;
+	emac_wr(priv, DMA_CONTROL, val);
+}
+
+/* Name		emac_configure_rx
+ * Arguments	priv : pointer to driver private data structure
+ * Return	none
+ * Description	Configures the receive unit of the device
+ */
+static void emac_configure_rx(struct emac_priv *priv)
+{
+	u32 val;
+
+	/* set the receive base address */
+	val = (u32)(priv->rx_ring.desc_dma_addr);
+	emac_wr(priv, DMA_RECEIVE_BASE_ADDRESS, val);
+
+	/* enable the receive */
+	val = emac_rd(priv, MAC_RECEIVE_CONTROL);
+	val |= MREGBIT_RECEIVE_ENABLE;
+	val |= MREGBIT_STORE_FORWARD;
+	emac_wr(priv, MAC_RECEIVE_CONTROL, val);
+
+	/* start rx dma */
+	val = emac_rd(priv, DMA_CONTROL);
+	val |= MREGBIT_START_STOP_RECEIVE_DMA;
+	emac_wr(priv, DMA_CONTROL, val);
+}
+
+/* Name		emac_free_tx_buf
+ * Arguments	priv : pointer to driver private data structure
+ * 		i: ring idx
+ * Return	0 - Success;
+ * Description	Freeing the TX buffer data.
+ */
+static int emac_free_tx_buf(struct emac_priv *priv, int i)
+{
+	struct emac_desc_ring *tx_ring;
+	struct emac_tx_desc_buffer *tx_buf;
+	struct desc_buf *buf;
+	int j;
+
+	tx_ring = &priv->tx_ring;
+	tx_buf = &tx_ring->tx_desc_buf[i];
+
+	for (j = 0; j < 2; j++) {
+		buf = &tx_buf->buf[j];
+		if (buf->dma_addr) {
+			if (buf->map_as_page)
+				dma_unmap_page(&priv->pdev->dev, buf->dma_addr,
+					       buf->dma_len, DMA_TO_DEVICE);
+			else
+				dma_unmap_single(&priv->pdev->dev, buf->dma_addr,
+						 buf->dma_len, DMA_TO_DEVICE);
+
+			buf->dma_addr = 0;
+			buf->map_as_page = false;
+			buf->buff_addr = NULL;
+		}
+	}
+
+	if (tx_buf->skb) {
+		dev_kfree_skb_any(tx_buf->skb);
+		tx_buf->skb = NULL;
+	}
+	return 0;
+}
+
+/* Name		emac_clean_tx_desc_ring
+ * Arguments	priv : pointer to driver private data structure
+ * Return	none
+ * Description	Freeing the TX resources allocated earlier.
+ */
+static void emac_clean_tx_desc_ring(struct emac_priv *priv)
+{
+	struct emac_desc_ring *tx_ring = &priv->tx_ring;
+	u32 i;
+
+	/* Free all the Tx ring sk_buffs */
+	for (i = 0; i < tx_ring->total_cnt; i++)
+		emac_free_tx_buf(priv, i);
+
+	tx_ring->head = 0;
+	tx_ring->tail = 0;
+}
+
+/* Name		emac_clean_rx_desc_ring
+ * Arguments	priv : pointer to driver private data structure
+ * Return	none
+ * Description	Freeing the RX resources allocated earlier.
+ */
+static void emac_clean_rx_desc_ring(struct emac_priv *priv)
+{
+	struct emac_desc_ring *rx_ring;
+	struct emac_desc_buffer *rx_buf;
+	u32 i;
+
+	rx_ring = &priv->rx_ring;
+
+	/* Free all the Rx ring sk_buffs */
+	for (i = 0; i < rx_ring->total_cnt; i++) {
+		rx_buf = &rx_ring->desc_buf[i];
+		if (rx_buf->skb) {
+			dma_unmap_single(&priv->pdev->dev, rx_buf->dma_addr,
+					 rx_buf->dma_len, DMA_FROM_DEVICE);
+
+			dev_kfree_skb(rx_buf->skb);
+			rx_buf->skb = NULL;
+		}
+	}
+
+	rx_ring->tail = 0;
+	rx_ring->head = 0;
+}
+
+void emac_ptp_init(struct emac_priv *priv)
+{
+	int ret;
+
+	if (priv->ptp_support) {
+		ret = clk_prepare_enable(priv->ptp_clk);
+		if (ret < 0) {
+			pr_warn("ptp clock failed to enable \n");
+			priv->ptp_clk = NULL;
+		}
+		emac_ptp_register(priv);
+	}
+}
+
+void emac_ptp_deinit(struct emac_priv *priv)
+{
+	if (priv->ptp_support) {
+		if (priv->ptp_clk)
+			clk_disable_unprepare(priv->ptp_clk);
+		emac_ptp_unregister(priv);
+	}
+}
+
+/* Name		emac_up
+ * Arguments	priv : pointer to driver private data structure
+ * Return	Status: 0 - Success;  non-zero - Fail
+ * Description	This function is called from emac_open and
+ *		performs the things when net interface is about to up.
+ *		It configues the Tx and Rx unit of the device and
+ *		registers interrupt handler.
+ *		It also starts one watchdog timer to monitor
+ *		the net interface link status.
+ */
+int emac_up(struct emac_priv *priv)
+{
+	struct net_device *ndev = priv->ndev;
+	struct platform_device *pdev  = priv->pdev;
+	int ret;
+	u32 val = 0;
+
+#ifdef CONFIG_PM_SLEEP
+	pm_runtime_get_sync(&pdev->dev);
+#endif
+	if (priv->ref_clk_frm_soc) {
+		ret = clk_prepare_enable(priv->phy_clk);
+		if (ret < 0) {
+			pr_err("failed to enable phy clock: %d\n", ret);
+			goto err;
+		}
+	}
+
+	ret = clk_prepare_enable(priv->mac_clk);
+	if (ret < 0) {
+		pr_err("failed to enable mac clock: %d\n", ret);
+		goto disable_phy_clk;
+	}
+
+	ret = emac_phy_connect(ndev);
+	if (ret) {
+		pr_err("%s  phy_connet failed\n", __func__);
+		goto disable_mac_clk;
+	}
+	/* init hardware */
+	emac_init_hw(priv);
+
+	emac_ptp_init(priv);
+
+	emac_set_mac_addr(priv, ndev->dev_addr);
+	/* configure transmit unit */
+	emac_configure_tx(priv);
+	/* configure rx unit */
+	emac_configure_rx(priv);
+
+	/* allocate buffers for receive descriptors */
+	emac_alloc_rx_desc_buffers(priv);
+
+	if (ndev->phydev)
+		phy_start(ndev->phydev);
+
+	/* allocates interrupt resources and
+	 * enables the interrupt line and IRQ handling
+	 */
+	ret = request_irq(priv->irq, emac_interrupt_handler,
+			  IRQF_SHARED, ndev->name, ndev);
+	if (ret) {
+		pr_err("request_irq failed\n");
+		goto request_irq_failed;
+	}
+
+	/* enable mac interrupt */
+	emac_wr(priv, MAC_INTERRUPT_ENABLE, 0x0000);
+
+	val |= MREGBIT_TRANSMIT_TRANSFER_DONE_INTR_ENABLE;
+	val |= MREGBIT_TRANSMIT_DMA_STOPPED_INTR_ENABLE;
+	val |= MREGBIT_RECEIVE_TRANSFER_DONE_INTR_ENABLE;
+	val |= MREGBIT_RECEIVE_DMA_STOPPED_INTR_ENABLE;
+	val |= MREGBIT_RECEIVE_MISSED_FRAME_INTR_ENABLE;
+
+	/* both rx tx */
+	emac_wr(priv, DMA_INTERRUPT_ENABLE, val);
+
+	napi_enable(&priv->napi);
+
+	netif_start_queue(ndev);
+	return 0;
+
+request_irq_failed:
+	emac_reset_hw(priv);
+	if (ndev->phydev) {
+		phy_stop(ndev->phydev);
+		phy_disconnect(ndev->phydev);
+	}
+disable_mac_clk:
+		clk_disable_unprepare(priv->mac_clk);
+disable_phy_clk:
+	if (priv->ref_clk_frm_soc)
+		clk_disable_unprepare(priv->phy_clk);
+err:
+#ifdef CONFIG_PM_SLEEP
+	pm_runtime_put_sync(&pdev->dev);
+#endif
+	return ret;
+}
+
+/* Name		emac_down
+ * Arguments	priv : pointer to driver private data structure
+ * Return	Status: 0 - Success;  non-zero - Fail
+ * Description	This function is called from emac_close and
+ *		performs the things when net interface is about to down.
+ *		It frees the irq, removes the various timers.
+ *		It sets the net interface off and
+ *		resets the hardware. Cleans the Tx and Rx
+ *		ring descriptor.
+ */
+int emac_down(struct emac_priv *priv)
+{
+	struct net_device *ndev = priv->ndev;
+	struct platform_device *pdev  = priv->pdev;
+
+	netif_stop_queue(ndev);
+	/* Stop and disconnect the PHY */
+	if (ndev->phydev) {
+		phy_stop(ndev->phydev);
+		phy_disconnect(ndev->phydev);
+	}
+
+	priv->link = false;
+	priv->duplex = DUPLEX_UNKNOWN;
+	priv->speed = SPEED_UNKNOWN;
+
+	napi_disable(&priv->napi);
+
+	emac_wr(priv, MAC_INTERRUPT_ENABLE, 0x0000);
+	emac_wr(priv, DMA_INTERRUPT_ENABLE, 0x0000);
+
+	free_irq(priv->irq, ndev);
+
+	emac_ptp_deinit(priv);
+
+	emac_reset_hw(priv);
+	netif_carrier_off(ndev);
+
+	clk_disable_unprepare(priv->mac_clk);
+	if (priv->ref_clk_frm_soc)
+		clk_disable_unprepare(priv->phy_clk);
+
+#ifdef CONFIG_PM_SLEEP
+	pm_runtime_put_sync(&pdev->dev);
+#endif
+	return 0;
+}
+
+/* Name		emac_alloc_tx_resources
+ * Arguments	priv : pointer to driver private data structure
+ * Return	Status: 0 - Success;  non-zero - Fail
+ * Description	Allocates TX resources and getting virtual & physical address.
+ */
+int emac_alloc_tx_resources(struct emac_priv *priv)
+{
+	struct emac_desc_ring *tx_ring = &priv->tx_ring;
+	struct platform_device *pdev  = priv->pdev;
+	u32 size;
+
+	size = sizeof(struct emac_tx_desc_buffer) * tx_ring->total_cnt;
+
+	/* allocate memory */
+	tx_ring->tx_desc_buf = kzalloc(size, GFP_KERNEL);
+	if (!tx_ring->tx_desc_buf) {
+		pr_err("Memory allocation failed for the Transmit descriptor buffer\n");
+		return -ENOMEM;
+	}
+
+	memset(tx_ring->tx_desc_buf, 0, size);
+
+	tx_ring->total_size = tx_ring->total_cnt * sizeof(struct emac_tx_desc);
+
+	EMAC_ROUNDUP(tx_ring->total_size, 1024);
+
+	tx_ring->desc_addr = dma_alloc_coherent(&pdev->dev,
+							tx_ring->total_size,
+							&tx_ring->desc_dma_addr,
+							GFP_KERNEL);
+	if (!tx_ring->desc_addr) {
+		pr_err("Memory allocation failed for the Transmit descriptor ring\n");
+		kfree(tx_ring->tx_desc_buf);
+		return -ENOMEM;
+	}
+
+	memset(tx_ring->desc_addr, 0, tx_ring->total_size);
+
+	tx_ring->head = 0;
+	tx_ring->tail = 0;
+
+	return 0;
+}
+
+/* Name		emac_alloc_rx_resources
+ * Arguments	priv	: pointer to driver private data structure
+ * Return	Status: 0 - Success;  non-zero - Fail
+ * Description	Allocates RX resources and getting virtual & physical address.
+ */
+int emac_alloc_rx_resources(struct emac_priv *priv)
+{
+	struct emac_desc_ring *rx_ring = &priv->rx_ring;
+	struct platform_device *pdev  = priv->pdev;
+	u32 buf_len;
+
+	buf_len = sizeof(struct emac_desc_buffer) * rx_ring->total_cnt;
+
+	rx_ring->desc_buf = kzalloc(buf_len, GFP_KERNEL);
+	if (!rx_ring->desc_buf) {
+		pr_err("Memory allocation failed for the Receive descriptor buffer\n");
+		return -ENOMEM;
+	}
+
+	memset(rx_ring->desc_buf, 0, buf_len);
+
+	/* round up to nearest 4K */
+	rx_ring->total_size = rx_ring->total_cnt * sizeof(struct emac_rx_desc);
+
+	EMAC_ROUNDUP(rx_ring->total_size, 1024);
+
+	rx_ring->desc_addr = dma_alloc_coherent(&pdev->dev,
+							rx_ring->total_size,
+							&rx_ring->desc_dma_addr,
+							GFP_KERNEL);
+	if (!rx_ring->desc_addr) {
+		pr_err("Memory allocation failed for the Receive descriptor ring\n");
+		kfree(rx_ring->desc_buf);
+		return -ENOMEM;
+	}
+
+	memset(rx_ring->desc_addr, 0, rx_ring->total_size);
+
+	rx_ring->head = 0;
+	rx_ring->tail = 0;
+
+	return 0;
+}
+
+/* Name		emac_free_tx_resources
+ * Arguments	priv : pointer to driver private data structure
+ * Return	none
+ * Description	Frees the Tx resources allocated
+ */
+void emac_free_tx_resources(struct emac_priv *priv)
+{
+	emac_clean_tx_desc_ring(priv);
+	kfree(priv->tx_ring.tx_desc_buf);
+	priv->tx_ring.tx_desc_buf = NULL;
+	dma_free_coherent(&priv->pdev->dev, priv->tx_ring.total_size,
+				priv->tx_ring.desc_addr,
+				priv->tx_ring.desc_dma_addr);
+	priv->tx_ring.desc_addr = NULL;
+}
+
+/* Name		emac_free_rx_resources
+ * Arguments	priv : pointer to driver private data structure
+ * Return	none
+ * Description	Frees the Rx resources allocated
+ */
+void emac_free_rx_resources(struct emac_priv *priv)
+{
+	emac_clean_rx_desc_ring(priv);
+	kfree(priv->rx_ring.desc_buf);
+	priv->rx_ring.desc_buf = NULL;
+	dma_free_coherent(&priv->pdev->dev, priv->rx_ring.total_size,
+				priv->rx_ring.desc_addr,
+				priv->rx_ring.desc_dma_addr);
+	priv->rx_ring.desc_addr = NULL;
+}
+
+/* Name		emac_open
+ * Arguments	pstNetdev : pointer to net_device structure
+ * Return	Status: 0 - Success;  non-zero - Fail
+ * Description	This function is called when net interface is made up.
+ *		Setting up Tx and Rx
+ *		resources and making the interface up.
+ */
+static int emac_open(struct net_device *ndev)
+{
+	struct emac_priv *priv = netdev_priv(ndev);
+	int ret;
+
+	ret = emac_alloc_tx_resources(priv);
+	if (ret) {
+		pr_err("Error in setting up the Tx resources\n");
+		goto emac_alloc_tx_resource_fail;
+	}
+
+	ret = emac_alloc_rx_resources(priv);
+	if (ret) {
+		pr_err("Error in setting up the Rx resources\n");
+		goto emac_alloc_rx_resource_fail;
+	}
+
+	ret = emac_up(priv);
+	if (ret) {
+		pr_err("Error in making the net intrface up\n");
+		goto emac_up_fail;
+	}
+	return 0;
+
+emac_up_fail:
+	emac_free_rx_resources(priv);
+emac_alloc_rx_resource_fail:
+	emac_free_tx_resources(priv);
+emac_alloc_tx_resource_fail:
+	return ret;
+}
+
+/* Name		emac_close
+ * Arguments	pstNetdev : pointer to net_device structure
+ * Return	Status: 0 - Success;  non-zero - Fail
+ * Description	This function is called when net interface is made down.
+ *		It calls the appropriate functions to
+ *		free Tx and Rx resources.
+ */
+static int emac_close(struct net_device *ndev)
+{
+	struct emac_priv *priv = netdev_priv(ndev);
+
+	emac_down(priv);
+	emac_free_tx_resources(priv);
+	emac_free_rx_resources(priv);
+
+	return 0;
+}
+
+/* Name		emac_tx_clean_desc
+ * Arguments	priv : pointer to driver private data structure
+ * Return	1: Cleaned; 0:Failed
+ * Description
+ */
+static int emac_tx_clean_desc(struct emac_priv *priv)
+{
+	struct emac_desc_ring *tx_ring;
+	struct emac_tx_desc_buffer *tx_buf;
+	struct emac_tx_desc *tx_desc;
+	struct net_device *ndev = priv->ndev;
+	u32 i;
+
+	netif_tx_lock(ndev);
+
+	tx_ring = &priv->tx_ring;
+
+	i = tx_ring->tail;
+
+	while (i != tx_ring->head) {
+		tx_desc = &((struct emac_tx_desc *)tx_ring->desc_addr)[i];
+
+		/* if desc still own by dma, so we quit it */
+		if (tx_desc->OWN)
+			break;
+
+		tx_buf = &tx_ring->tx_desc_buf[i];
+
+		if (tx_buf->timestamped && tx_buf->skb) {
+			emac_get_tx_hwtstamp(priv, tx_buf->skb);
+			tx_buf->timestamped = 0;
+		}
+
+		emac_free_tx_buf(priv, i);
+		memset(tx_desc, 0, sizeof(struct emac_tx_desc));
+
+		if (++i == tx_ring->total_cnt)
+			i = 0;
+	}
+
+	tx_ring->tail = i;
+
+	if (unlikely(netif_queue_stopped(ndev) &&
+		     emac_tx_avail(priv) > tx_ring->total_cnt / 4))
+		netif_wake_queue(ndev);
+
+	netif_tx_unlock(ndev);
+
+	return 0;
+}
+
+static int emac_rx_frame_status(struct emac_priv *priv, struct emac_rx_desc *dsc)
+{
+	/* if last descritpor isn't set, so we drop it*/
+	if (!dsc->LastDescriptor) {
+		netdev_dbg(priv->ndev, "rx LD bit isn't set, drop it.\n");
+		return frame_discard;
+	}
+
+	/*
+	 * A Frame that is less than 64-bytes (from DA thru the FCS field)
+	 * is considered as Runt Frame.
+	 * Most of the Runt Frames happen because of collisions.
+	 */
+	if (dsc->ApplicationStatus & EMAC_RX_FRAME_RUNT) {
+		netdev_dbg(priv->ndev, "rx frame less than 64.\n");
+		return frame_discard;
+	}
+
+	/*
+	 * When the frame fails the CRC check,
+	 * the frame is assumed to have the CRC error
+	 */
+	if (dsc->ApplicationStatus & EMAC_RX_FRAME_CRC_ERR) {
+		netdev_dbg(priv->ndev, "rx frame crc error\n");
+		return frame_discard;
+	}
+
+	/*
+	 * When the length of the frame exceeds
+	 * the Programmed Max Frame Length
+	 */
+	if (dsc->ApplicationStatus & EMAC_RX_FRAME_MAX_LEN_ERR) {
+		netdev_dbg(priv->ndev, "rx frame too long\n");
+		return frame_discard;
+	}
+
+	/*
+	 * frame reception is truncated at that point and
+	 * frame is considered to have Jabber Error
+	 */
+	if (dsc->ApplicationStatus & EMAC_RX_FRAME_JABBER_ERR) {
+		netdev_dbg(priv->ndev, "rx frame has been truncated\n");
+		return frame_discard;
+	}
+
+	/* this bit is only for 802.3 Type Frames */
+	if (dsc->ApplicationStatus & EMAC_RX_FRAME_LENGTH_ERR) {
+		netdev_dbg(priv->ndev, "rx frame length err for 802.3\n");
+		return frame_discard;
+	}
+
+	if (dsc->FramePacketLength <= ETHERNET_FCS_SIZE ||
+	    dsc->FramePacketLength > priv->dma_buf_sz) {
+		netdev_dbg(priv->ndev, "rx frame len too small or too long\n");
+		return frame_discard;
+	}
+	return frame_ok;
+}
+
+/* Name		emac_rx_clean_desc
+ * Arguments	priv : pointer to driver private data structure
+ * Return	1: Cleaned; 0:Failed
+ * Description
+ */
+static int emac_rx_clean_desc(struct emac_priv *priv, int budget)
+{
+	struct emac_desc_ring *rx_ring;
+	struct emac_desc_buffer *rx_buf;
+	struct net_device *ndev = priv->ndev;
+	struct emac_rx_desc *rx_desc;
+	struct sk_buff *skb = NULL;
+	int status;
+	u32 receive_packet = 0;
+	u32 i;
+	u32 skb_len;
+
+	rx_ring = &priv->rx_ring;
+
+	i = rx_ring->tail;
+
+	while (budget--) {
+		/* get rx desc */
+		rx_desc = &((struct emac_rx_desc *)rx_ring->desc_addr)[i];
+
+		/* if rx_desc still owned by DMA, so we need to wait */
+		if (rx_desc->OWN)
+			break;
+
+		rx_buf = &rx_ring->desc_buf[i];
+
+		if (!rx_buf->skb)
+			break;
+
+		receive_packet++;
+
+		dma_unmap_single(&priv->pdev->dev, rx_buf->dma_addr,
+				 rx_buf->dma_len, DMA_FROM_DEVICE);
+
+		status = emac_rx_frame_status(priv, rx_desc);
+		if (unlikely(status == frame_discard)) {
+			ndev->stats.rx_dropped++;
+			dev_kfree_skb_irq(rx_buf->skb);
+			rx_buf->skb = NULL;
+		} else {
+			skb = rx_buf->skb;
+			skb_len = rx_desc->FramePacketLength - ETHERNET_FCS_SIZE;
+			skb_put(skb, skb_len);
+			skb->dev = ndev;
+			ndev->hard_header_len = ETH_HLEN;
+
+			emac_get_rx_hwtstamp(priv, rx_desc, skb);
+
+			skb->protocol = eth_type_trans(skb, ndev);
+
+			skb->ip_summed = CHECKSUM_NONE;
+
+			napi_gro_receive(&priv->napi, skb);
+
+			ndev->stats.rx_packets++;
+			ndev->stats.rx_bytes += skb_len;
+
+			memset(rx_desc, 0, sizeof(struct emac_rx_desc));
+			rx_buf->skb = NULL;
+		}
+
+		if (++i == rx_ring->total_cnt)
+			i = 0;
+	}
+
+	rx_ring->tail = i;
+
+	emac_alloc_rx_desc_buffers(priv);
+
+	return receive_packet;
+}
+
+/* Name		emac_alloc_rx_desc_buffers
+ * Arguments	priv : pointer to driver private data structure
+ * Return	1: Cleaned; 0:Failed
+ * Description
+ */
+static void emac_alloc_rx_desc_buffers(struct emac_priv *priv)
+{
+	struct net_device *ndev = priv->ndev;
+	struct emac_desc_ring *rx_ring = &priv->rx_ring;
+	struct emac_desc_buffer *rx_buf;
+	struct sk_buff *skb;
+	struct emac_rx_desc *rx_desc;
+	u32 i;
+
+	i = rx_ring->head;
+	rx_buf = &rx_ring->desc_buf[i];
+
+	while (!rx_buf->skb) {
+		skb = netdev_alloc_skb_ip_align(ndev, priv->dma_buf_sz);
+		if (!skb) {
+			pr_err("sk_buff allocation failed\n");
+			break;
+		}
+
+		skb->dev = ndev;
+
+		rx_buf->skb = skb;
+		rx_buf->dma_len = priv->dma_buf_sz;
+		rx_buf->dma_addr = dma_map_single(&priv->pdev->dev,
+						  skb->data,
+						  priv->dma_buf_sz,
+						  DMA_FROM_DEVICE);
+		if (dma_mapping_error(&priv->pdev->dev, rx_buf->dma_addr)) {
+			netdev_err(ndev, "dma mapping_error\n");
+			goto dma_map_err;
+		}
+
+		rx_desc = &((struct emac_rx_desc *)rx_ring->desc_addr)[i];
+
+		memset(rx_desc, 0, sizeof(struct emac_rx_desc));
+
+		rx_desc->BufferAddr1 = rx_buf->dma_addr;
+		rx_desc->BufferSize1 = rx_buf->dma_len;
+
+		rx_desc->FirstDescriptor = 0;
+		rx_desc->LastDescriptor = 0;
+		if (++i == rx_ring->total_cnt) {
+			rx_desc->EndRing = 1;
+			i = 0;
+		}
+		dma_wmb();
+		rx_desc->OWN = 1;
+
+		rx_buf = &rx_ring->desc_buf[i];
+	}
+	rx_ring->head = i;
+	return;
+dma_map_err:
+	dev_kfree_skb_any(skb);
+	rx_buf->skb = NULL;
+	return;
+}
+
+static int emac_rx_poll(struct napi_struct *napi, int budget)
+{
+	struct emac_priv *priv =
+				container_of(napi, struct emac_priv, napi);
+	int work_done;
+
+	emac_tx_clean_desc(priv);
+
+	work_done = emac_rx_clean_desc(priv, budget);
+	if (work_done < budget) {
+		napi_complete(napi);
+		emac_enable_interrupt(priv);
+	}
+
+	return work_done;
+}
+
+/* Name		emac_tx_mem_map
+ * Arguments	priv : pointer to driver private data structure
+ *		pstSkb : pointer to sk_buff structure passed by upper layer
+ *		max_tx_len : max data len per descriptor
+ *		frag_num : number of fragments in the packet
+ * Return	number of descriptors needed for transmitting packet
+ * Description
+ */
+static int emac_tx_mem_map(struct emac_priv *priv, struct sk_buff *skb,
+			   u32 max_tx_len, u32 frag_num)
+{
+	struct emac_desc_ring *tx_ring;
+	struct emac_tx_desc_buffer *tx_buf;
+	struct emac_tx_desc *tx_desc;
+	u32 skb_linear_len = skb_headlen(skb);
+	u32 len, i, f, first, buf_idx = 0;
+	phys_addr_t addr;
+	u8 do_tx_timestamp = 0;
+
+	tx_ring = &priv->tx_ring;
+
+	i = tx_ring->head;
+	first = i;
+
+	skb_tx_timestamp(skb);
+
+	if (unlikely((skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) &&
+				priv->hwts_tx_en)) {
+		/* declare that device is doing timestamping */
+		skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
+		do_tx_timestamp = 1;
+	}
+
+
+	if (++i == tx_ring->total_cnt)
+		i = 0;
+
+	/* if the data is fragmented */
+	for (f = 0; f < frag_num; f++) {
+		const skb_frag_t *frag = &skb_shinfo(skb)->frags[f];
+
+		len = skb_frag_size(frag);
+
+		buf_idx = (f + 1) % 2;
+
+		/* first frag fill into second buffer of first descriptor */
+		if (f == 0) {
+			tx_buf = &tx_ring->tx_desc_buf[first];
+			tx_desc = &((struct emac_tx_desc *)tx_ring->desc_addr)[first];
+		} else {
+			/* from second frags to more frags,
+			 * we only get new descriptor when it frag num is odd.
+			 */
+			if (!buf_idx) {
+				tx_buf = &tx_ring->tx_desc_buf[i];
+				tx_desc = &((struct emac_tx_desc *)tx_ring->desc_addr)[i];
+			}
+		}
+		tx_buf->buf[buf_idx].dma_len = len;
+
+		addr = skb_frag_dma_map(&priv->pdev->dev, frag, 0,
+				       skb_frag_size(frag),
+				       DMA_TO_DEVICE);
+
+		if (dma_mapping_error(&priv->pdev->dev, addr)) {
+			netdev_err(priv->ndev, "%s dma map page:%d error \n",
+					   __func__, f);
+			goto dma_map_err;
+		}
+		tx_buf->buf[buf_idx].dma_addr = addr;
+
+		tx_buf->buf[buf_idx].map_as_page = true;
+
+		if (do_tx_timestamp)
+			tx_buf->timestamped = 1;
+
+		/*
+		 * every desc has two buffer for packet
+		 */
+
+		if (buf_idx) {
+			tx_desc->BufferAddr2 = addr;
+			tx_desc->BufferSize2 = len;
+		} else {
+			tx_desc->BufferAddr1 = addr;
+			tx_desc->BufferSize1 = len;
+
+			if (++i == tx_ring->total_cnt) {
+				tx_desc->EndRing = 1;
+				i = 0;
+			}
+		}
+
+		/*
+		 * if frag num equal 1, we don't set tx_desc except buffer addr & size
+		 */
+		if (f > 0) {
+			if (f == (frag_num - 1)) {
+				tx_desc->LastSegment = 1;
+				tx_buf->skb = skb;
+				if (emac_tx_coal(priv, frag_num + 1))
+					tx_desc->InterruptOnCompletion = 1;
+			}
+
+			tx_desc->OWN = 1;
+		}
+	}
+
+	/* fill out first descriptor for skb linear data */
+	tx_buf = &tx_ring->tx_desc_buf[first];
+
+	tx_buf->buf[0].dma_len = skb_linear_len;
+
+	addr = dma_map_single(&priv->pdev->dev, skb->data,
+			      skb_linear_len, DMA_TO_DEVICE);
+	if (dma_mapping_error(&priv->pdev->dev, addr)) {
+		netdev_err(priv->ndev, "%s dma mapping_error\n", __func__);
+		goto dma_map_err;
+	}
+
+	tx_buf->buf[0].dma_addr = addr;
+
+	tx_buf->buf[0].buff_addr = skb->data;
+	tx_buf->buf[0].map_as_page = false;
+
+	/* fill tx descriptor */
+	tx_desc = &((struct emac_tx_desc *)tx_ring->desc_addr)[first];
+	tx_desc->BufferAddr1 = addr;
+	tx_desc->BufferSize1 = skb_linear_len;
+	tx_desc->FirstSegment = 1;
+
+	/* if last desc for ring, need to end ring flag */
+	if (first == (tx_ring->total_cnt - 1)) {
+		tx_desc->EndRing = 1;
+	}
+
+	/*
+	 * if frag num more than 1, that means data need another desc
+	 * so current descriptor isn't last piece of packet data.
+	 */
+	tx_desc->LastSegment = frag_num > 1 ? 0 : 1;
+	if ((frag_num <= 1) && emac_tx_coal(priv, 1))
+		tx_desc->InterruptOnCompletion = 1;
+
+	if (do_tx_timestamp) {
+		tx_desc->tx_timestamp = 1;
+		tx_buf->timestamped = 1;
+	}
+
+	/* only last descriptor had skb pointer */
+	if (tx_desc->LastSegment)
+		tx_buf->skb = skb;
+
+	tx_desc->OWN = 1;
+
+	dma_wmb();
+
+	emac_dma_start_transmit(priv);
+
+	/* update tx ring head */
+	tx_ring->head = i;
+
+	return 0;
+dma_map_err:
+	dev_kfree_skb_any(skb);
+	priv->ndev->stats.tx_dropped++;
+	return 0;
+}
+
+/* Name		emac_start_xmit
+ * Arguments	pstSkb : pointer to sk_buff structure passed by upper layer
+ *		pstNetdev : pointer to net_device structure
+ * Return	Status: 0 - Success;  non-zero - Fail
+ * Description	This function is called by upper layer to
+ *		handover the Tx packet to the driver
+ *		for sending it to the device.
+ *		Currently this is doing nothing but
+ *		simply to simulate the tx packet handling.
+ */
+static int emac_start_xmit(struct sk_buff *skb, struct net_device *ndev)
+{
+	struct emac_priv *priv = netdev_priv(ndev);
+	int nfrags = skb_shinfo(skb)->nr_frags;
+
+	if (unlikely(emac_tx_avail(priv) < nfrags + 1)) {
+		if (!netif_queue_stopped(ndev)) {
+			netif_stop_queue(ndev);
+			pr_err_ratelimited("tx ring full, stop tx queue\n");
+		}
+		return NETDEV_TX_BUSY;
+	}
+
+	emac_tx_mem_map(priv, skb, MAX_DATA_LEN_TX_DES, nfrags);
+
+	ndev->stats.tx_packets++;
+	ndev->stats.tx_bytes += skb->len;
+
+	/* Make sure there is space in the ring for the next send. */
+	if (unlikely(emac_tx_avail(priv) <= (MAX_SKB_FRAGS + 2)))
+		netif_stop_queue(ndev);
+
+	return NETDEV_TX_OK;
+}
+
+u32 ReadTxStatCounters(struct emac_priv *priv, u8 cnt)
+{
+	u32 val, tmp;
+
+	val = 0x8000 | cnt;
+	emac_wr(priv, MAC_TX_STATCTR_CONTROL, val);
+	val = emac_rd(priv, MAC_TX_STATCTR_CONTROL);
+
+	if (readl_poll_timeout_atomic(priv->iobase + MAC_TX_STATCTR_CONTROL,
+			       val, !(val & 0x8000), 100, 10000)) {
+		pr_err("%s timeout!!\n", __func__);
+		return -EINVAL;
+	}
+
+	tmp = emac_rd(priv, MAC_TX_STATCTR_DATA_HIGH);
+	val = tmp << 16;
+	tmp = emac_rd(priv, MAC_TX_STATCTR_DATA_LOW);
+	val |= tmp;
+
+	return val;
+}
+
+u32 ReadRxStatCounters(struct emac_priv *priv, u8 cnt)
+{
+	u32 val, tmp;
+
+	val = 0x8000 | cnt;
+	emac_wr(priv, MAC_RX_STATCTR_CONTROL, val);
+	val = emac_rd(priv, MAC_RX_STATCTR_CONTROL);
+
+	if (readl_poll_timeout_atomic(priv->iobase + MAC_RX_STATCTR_CONTROL,
+			       val, !(val & 0x8000), 100, 10000)) {
+		pr_err("%s timeout!!\n", __func__);
+		return -EINVAL;
+	}
+
+	tmp = emac_rd(priv, MAC_RX_STATCTR_DATA_HIGH);
+	val = tmp << 16;
+	tmp = emac_rd(priv, MAC_RX_STATCTR_DATA_LOW);
+	val |= tmp;
+	return val;
+}
+
+/* Name		emac_set_mac_address
+ * Arguments	pstNetdev	: pointer to net_device structure
+ *		addr : pointer to addr
+ * Return	Status: 0 - Success;  non-zero - Fail
+ * Description	It is called by upper layer to set the mac address.
+ */
+static int emac_set_mac_address(struct net_device *ndev, void *addr)
+{
+	struct emac_priv *priv = netdev_priv(ndev);
+	int ret = 0;
+
+
+	ret = eth_mac_addr(ndev, addr);
+	if (ret)
+		goto set_mac_error;
+
+	/*
+	 * if nic not running, we just save addr
+	 * it will be set during device_open;
+	 * otherwise directly change hw mac setting.
+	 */
+
+	if (netif_running(ndev))
+		emac_set_mac_addr(priv, ndev->dev_addr);
+
+set_mac_error:
+
+	return ret;
+}
+
+void emac_mac_multicast_filter_clear(struct emac_priv *priv)
+{
+	emac_wr(priv, MAC_MULTICAST_HASH_TABLE1, 0x0);
+	emac_wr(priv, MAC_MULTICAST_HASH_TABLE2, 0x0);
+	emac_wr(priv, MAC_MULTICAST_HASH_TABLE3, 0x0);
+	emac_wr(priv, MAC_MULTICAST_HASH_TABLE4, 0x0);
+}
+
+/* Configure Multicast and Promiscuous modes */
+static void emac_rx_mode_set(struct net_device *ndev)
+{
+	struct emac_priv *priv = netdev_priv(ndev);
+	struct netdev_hw_addr *ha;
+	u32 mc_filter[4] = {0};
+	u32 val;
+	u32 crc32, bit, reg, hash;
+
+	val = emac_rd(priv, MAC_ADDRESS_CONTROL);
+
+	val &= ~MREGBIT_PROMISCUOUS_MODE;
+
+	if (ndev->flags & IFF_PROMISC) {
+		/* enable promisc mode */
+		val |= MREGBIT_PROMISCUOUS_MODE;
+	} else if ((ndev->flags & IFF_ALLMULTI) ||
+			(netdev_mc_count(ndev) > HASH_TABLE_SIZE)) {
+		/* Pass all multi */
+		/* Set the 64 bits of the HASH tab. To be updated if taller
+		 * hash table is used
+		 */
+		emac_wr(priv, MAC_MULTICAST_HASH_TABLE1, 0xffff);
+		emac_wr(priv, MAC_MULTICAST_HASH_TABLE2, 0xffff);
+		emac_wr(priv, MAC_MULTICAST_HASH_TABLE3, 0xffff);
+		emac_wr(priv, MAC_MULTICAST_HASH_TABLE4, 0xffff);
+	} else if (!netdev_mc_empty(ndev)) {
+		emac_mac_multicast_filter_clear(priv);
+		netdev_for_each_mc_addr(ha, ndev) {
+
+			/* Calculate the CRC of the MAC address */
+			crc32 = ether_crc(ETH_ALEN, ha->addr);
+
+			/*
+			 * The HASH Table is an array of 4 16-bit registers. It is
+			 * treated like an array of 64 bits (BitArray[hash_value]).
+			 * Use the upper 6 bits of the above CRC as the hash value.
+			 */
+			hash = (crc32 >> 26) & 0x3F;
+			reg = hash / 16;
+			bit = hash % 16;
+			mc_filter[reg] |= BIT(bit);
+			pr_debug("%s %pM crc32:0x%x hash:0x%x reg:%d bit:%d\n",
+				 __func__,ha->addr, crc32, hash, reg, bit);
+		}
+		emac_wr(priv, MAC_MULTICAST_HASH_TABLE1, mc_filter[0]);
+		emac_wr(priv, MAC_MULTICAST_HASH_TABLE2, mc_filter[1]);
+		emac_wr(priv, MAC_MULTICAST_HASH_TABLE3, mc_filter[2]);
+		emac_wr(priv, MAC_MULTICAST_HASH_TABLE4, mc_filter[3]);
+	}
+	emac_wr(priv, MAC_ADDRESS_CONTROL, val);
+	return;
+}
+
+/* Name		emac_change_mtu
+ * Arguments	pstNetdev : pointer to net_device structure
+ *		u32MTU	: maximum transmit unit value
+ *		Return		Status: 0 - Success;  non-zero - Fail
+ * Description	It is called by upper layer to set the MTU value.
+ */
+static int emac_change_mtu(struct net_device *ndev, int mtu)
+{
+	struct emac_priv *priv = netdev_priv(ndev);
+	u32 frame_len;
+
+	if (netif_running(ndev)) {
+		pr_err("must be stopped to change its MTU\n");
+		return -EBUSY;
+	}
+
+	frame_len = mtu + ETHERNET_HEADER_SIZE + ETHERNET_FCS_SIZE;
+
+	if (frame_len < MINIMUM_ETHERNET_FRAME_SIZE ||
+		frame_len > EMAC_RX_BUF_4K) {
+			pr_err("Invalid MTU setting\n");
+			return -EINVAL;
+	}
+
+	if (frame_len <= EMAC_DEFAULT_BUFSIZE)
+		priv->dma_buf_sz = EMAC_DEFAULT_BUFSIZE;
+	else if (frame_len <= EMAC_RX_BUF_2K)
+		priv->dma_buf_sz = EMAC_RX_BUF_2K;
+	else
+		priv->dma_buf_sz = EMAC_RX_BUF_4K;
+
+	ndev->mtu = mtu;
+
+	return 0;
+}
+
+static void emac_reset(struct emac_priv *priv)
+{
+	if (!test_and_clear_bit(EMAC_RESET_REQUESTED, &priv->state))
+		return;
+	if (test_bit(EMAC_DOWN, &priv->state))
+		return;
+
+	netdev_err(priv->ndev, "Reset controller.\n");
+
+	rtnl_lock();
+	netif_trans_update(priv->ndev);
+	while (test_and_set_bit(EMAC_RESETING, &priv->state))
+		usleep_range(1000, 2000);
+
+	set_bit(EMAC_DOWN, &priv->state);
+	dev_close(priv->ndev);
+	dev_open(priv->ndev, NULL);
+	clear_bit(EMAC_DOWN, &priv->state);
+	clear_bit(EMAC_RESETING, &priv->state);
+	rtnl_unlock();
+}
+
+static void emac_tx_timeout_task(struct work_struct *work)
+{
+	struct emac_priv *priv = container_of(work,
+					      struct emac_priv, tx_timeout_task);
+	emac_reset(priv);
+	clear_bit(EMAC_TASK_SCHED, &priv->state);
+}
+
+/* Name		emac_tx_timeout
+ * Arguments	pstNetdev : pointer to net_device structure
+ * Return	none
+ * Description	It is called by upper layer
+ *		for packet transmit timeout.
+ */
+static void emac_tx_timeout(struct net_device *ndev, unsigned int txqueue)
+{
+	struct emac_priv *priv = netdev_priv(ndev);
+
+	netdev_info(ndev, "TX timeout\n");
+
+	netif_carrier_off(priv->ndev);
+	set_bit(EMAC_RESET_REQUESTED, &priv->state);
+
+	if (!test_bit(EMAC_DOWN, &priv->state) &&
+	    !test_and_set_bit(EMAC_TASK_SCHED, &priv->state))
+		schedule_work(&priv->tx_timeout_task);
+}
+
+static int clk_phase_rgmii_set(struct emac_priv *priv, bool is_tx)
+{
+	u32 val;
+
+	switch (priv->clk_tuning_way) {
+	case CLK_TUNING_BY_REG:
+		val = readl(priv->ctrl_reg);
+		if (is_tx) {
+			val &= ~RGMII_TX_PHASE_MASK;
+			val |= (priv->tx_clk_phase & 0x7) << RGMII_TX_PHASE_OFFSET;
+		} else {
+			val &= ~RGMII_RX_PHASE_MASK;
+			val |= (priv->rx_clk_phase & 0x7) << RGMII_RX_PHASE_OFFSET;
+		}
+		writel(val, priv->ctrl_reg);
+		break;
+	case CLK_TUNING_BY_DLINE:
+		val = readl(priv->dline_reg);
+		if (is_tx) {
+			val &= ~EMAC_TX_DLINE_CODE_MASK;
+			val |= priv->tx_clk_phase << EMAC_TX_DLINE_CODE_OFFSET;
+			val |= EMAC_TX_DLINE_EN;
+		} else {
+			val &= ~EMAC_RX_DLINE_CODE_MASK;
+			val |= priv->rx_clk_phase << EMAC_RX_DLINE_CODE_OFFSET;
+			val |= EMAC_RX_DLINE_EN;
+		}
+		writel(val, priv->dline_reg);
+		break;
+	default:
+		pr_err("wrong clk tuning way:%d !!\n", priv->clk_tuning_way);
+		return -1;
+	}
+	pr_debug("%s tx phase:%d rx phase:%d\n",
+		__func__, priv->tx_clk_phase, priv->rx_clk_phase);
+	return 0;
+}
+
+static int clk_phase_rmii_set(struct emac_priv *priv, bool is_tx)
+{
+	u32 val;
+
+	switch (priv->clk_tuning_way) {
+	case CLK_TUNING_BY_REG:
+		val = readl(priv->ctrl_reg);
+		if (is_tx) {
+			val &= ~RMII_TX_PHASE_MASK;
+			val |= (priv->tx_clk_phase & 0x7) << RMII_TX_PHASE_OFFSET;
+		} else {
+			val &= ~RMII_RX_PHASE_MASK;
+			val |= (priv->rx_clk_phase & 0x7) << RMII_RX_PHASE_OFFSET;
+		}
+		writel(val, priv->ctrl_reg);
+		break;
+	case CLK_TUNING_BY_CLK_REVERT:
+		val = readl(priv->ctrl_reg);
+		if (is_tx) {
+			if (priv->tx_clk_phase == CLK_PHASE_REVERT)
+				val |= RMII_TX_CLK_SEL;
+			else
+				val &= ~RMII_TX_CLK_SEL;
+		} else {
+			if (priv->rx_clk_phase == CLK_PHASE_REVERT)
+				val |= RMII_RX_CLK_SEL;
+			else
+				val &= ~RMII_RX_CLK_SEL;
+		}
+		writel(val, priv->ctrl_reg);
+		break;
+	default:
+		pr_err("wrong clk tuning way:%d !!\n", priv->clk_tuning_way);
+		return -1;
+	}
+	pr_debug("%s tx phase:%d rx phase:%d\n",
+		__func__, priv->tx_clk_phase, priv->rx_clk_phase);
+	return 0;
+}
+
+static int clk_phase_set(struct emac_priv *priv, bool is_tx)
+{
+	if (priv->clk_tuning_enable) {
+		if (emac_is_rmii(priv)) {
+			clk_phase_rmii_set(priv, is_tx);
+		} else {
+			clk_phase_rgmii_set(priv, is_tx);
+		}
+	}
+
+	return 0;
+}
+
+#ifdef CONFIG_DEBUG_FS
+static int clk_phase_show(struct seq_file *s, void *data)
+{
+	struct emac_priv *priv = s->private;
+
+	seq_printf(s, "Emac MII Interface : %s\n", emac_is_rmii(priv) ? "RMII" : "RGMII");
+	seq_printf(s, "Current rx phase : %d\n", priv->rx_clk_phase);
+	seq_printf(s, "Current tx phase : %d\n", priv->tx_clk_phase);
+
+	return 0;
+}
+
+static ssize_t clk_tuning_write(struct file *file,
+				const char __user *user_buf,
+				size_t count, loff_t *ppos)
+{
+	struct emac_priv *priv =
+				((struct seq_file *)(file->private_data))->private;
+	int err;
+	int clk_phase;
+	char buff[TUNING_CMD_LEN] = { 0 };
+	char mode_str[20];
+
+	if (count > TUNING_CMD_LEN) {
+		pr_err("count must be less than 50.\n");
+		return count;
+	}
+	err = copy_from_user(buff, user_buf, count);
+	if (err)
+		return err;
+
+	err = sscanf(buff, "%s %d", (char *)&mode_str, &clk_phase);
+	if (err != 2) {
+		pr_err("debugfs para count error\n");
+		return count;
+	}
+	if (clk_phase >= CLK_PHASE_CNT) {
+		pr_err("debugfs error input must less than %d\n",
+		       CLK_PHASE_CNT);
+		return -EINVAL;
+	}
+	pr_info("input:%s %d\n", mode_str, clk_phase);
+
+	if (strcmp(mode_str, "tx") == 0) {
+		priv->tx_clk_phase = clk_phase;
+		clk_phase_set(priv, TX_PHASE);
+	} else if (strcmp(mode_str, "rx") == 0) {
+		priv->rx_clk_phase = clk_phase;
+		clk_phase_set(priv, RX_PHASE);
+	} else {
+		pr_err("command error\n");
+		pr_err("eg: echo rx 1 > clk_tuning\n");
+		return count;
+	}
+
+	return count;
+}
+
+static int clk_tuning_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, clk_phase_show, inode->i_private);
+}
+
+const struct file_operations clk_tuning_fops = {
+	.open		= clk_tuning_open,
+	.write		= clk_tuning_write,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= single_release,
+};
+
+#endif
+
+static int emac_mii_reset(struct mii_bus *bus)
+{
+	struct emac_priv *priv = bus->priv;
+	struct device *dev = &priv->pdev->dev;
+	int rst_gpio, ldo_gpio;
+	int active_state;
+	u32 delays[3] = {0};
+
+	if (dev->of_node) {
+		struct device_node *np = dev->of_node;
+
+		if (!np)
+			return 0;
+
+		ldo_gpio = of_get_named_gpio(np, "emac,ldo-gpio", 0);
+		if (ldo_gpio >= 0) {
+			if (gpio_request(ldo_gpio, "mdio-ldo"))
+				return 0;
+
+			gpio_direction_output(ldo_gpio, 1);
+		}
+
+		rst_gpio = of_get_named_gpio(np, "emac,reset-gpio", 0);
+		if (rst_gpio < 0)
+			return 0;
+
+		active_state = of_property_read_bool(np,
+						     "emac,reset-active-low");
+		of_property_read_u32_array(np,
+					   "emac,reset-delays-us", delays, 3);
+
+		if (gpio_request(rst_gpio, "mdio-reset"))
+			return 0;
+
+		gpio_direction_output(rst_gpio,
+		                      active_state ? 1 : 0);
+		if (delays[0])
+		        msleep(DIV_ROUND_UP(delays[0], 1000));
+
+		gpio_set_value(rst_gpio, active_state ? 0 : 1);
+		if (delays[1])
+		        msleep(DIV_ROUND_UP(delays[1], 1000));
+
+		gpio_set_value(rst_gpio, active_state ? 1 : 0);
+		if (delays[2])
+		        msleep(DIV_ROUND_UP(delays[2], 1000));
+        }
+	return 0;
+}
+
+static int emac_mii_read(struct mii_bus *bus, int phy_addr, int regnum)
+{
+	struct emac_priv *priv = bus->priv;
+	u32 cmd = 0;
+	u32 val;
+
+	cmd |= phy_addr & 0x1F;
+	cmd |= (regnum & 0x1F) << 5;
+	cmd |= MREGBIT_START_MDIO_TRANS | MREGBIT_MDIO_READ_WRITE;
+
+	emac_wr(priv, MAC_MDIO_DATA, 0x0);
+	emac_wr(priv, MAC_MDIO_CONTROL, cmd);
+
+	if (readl_poll_timeout(priv->iobase + MAC_MDIO_CONTROL,
+			       val, !((val >> 15) & 0x1), 100, 10000))
+		return -EBUSY;
+
+	val = emac_rd(priv, MAC_MDIO_DATA);
+	return val;
+}
+
+static int emac_mii_write(struct mii_bus *bus, int phy_addr, int regnum,
+			    u16 value)
+{
+	struct emac_priv *priv = bus->priv;
+	u32 cmd = 0;
+	u32 val;
+
+	emac_wr(priv, MAC_MDIO_DATA, value);
+
+	cmd |= phy_addr & 0x1F;
+	cmd |= (regnum & 0x1F) << 5;
+	cmd |= MREGBIT_START_MDIO_TRANS;
+
+	emac_wr(priv, MAC_MDIO_CONTROL, cmd);
+
+	if (readl_poll_timeout(priv->iobase + MAC_MDIO_CONTROL,
+			       val, !((val >> 15) & 0x1), 100, 10000))
+		return -EBUSY;
+
+	return 0;
+}
+
+static void emac_adjust_link(struct net_device *dev)
+{
+	struct phy_device *phydev = dev->phydev;
+	struct emac_priv *priv = netdev_priv(dev);
+	bool link_changed = false;
+	u32 ctrl;
+
+	if (!phydev)
+		return;
+
+	if (phydev->link) {
+		ctrl = emac_rd(priv, MAC_GLOBAL_CONTROL);
+
+		/* Now we make sure that we can be in full duplex mode
+		 * If not, we operate in half-duplex mode.
+		 */
+		if (phydev->duplex != priv->duplex) {
+			link_changed = true;
+
+			if (!phydev->duplex)
+				ctrl &= ~MREGBIT_FULL_DUPLEX_MODE;
+			else
+				ctrl |= MREGBIT_FULL_DUPLEX_MODE;
+			priv->duplex = phydev->duplex;
+		}
+
+		if (phydev->speed != priv->speed) {
+			link_changed = true;
+
+			ctrl &= ~MREGBIT_SPEED;
+
+			switch (phydev->speed) {
+			case SPEED_1000:
+				ctrl |= MREGBIT_SPEED_1000M;
+				break;
+			case SPEED_100:
+				ctrl |= MREGBIT_SPEED_100M;
+				break;
+			case SPEED_10:
+				ctrl |= MREGBIT_SPEED_10M;
+				break;
+			default:
+				pr_err("broken speed: %d\n", phydev->speed);
+				phydev->speed = SPEED_UNKNOWN;
+				break;
+			}
+			if (phydev->speed != SPEED_UNKNOWN) {
+				priv->speed = phydev->speed;
+			}
+		}
+
+		emac_wr(priv, MAC_GLOBAL_CONTROL, ctrl);
+
+		if (!priv->link) {
+			priv->link = true;
+			link_changed = true;
+		}
+	} else if (priv->link) {
+		priv->link = false;
+		link_changed = true;
+		priv->duplex = DUPLEX_UNKNOWN;
+		priv->speed = SPEED_UNKNOWN;
+	}
+
+	if (link_changed)
+		phy_print_status(phydev);
+}
+
+static int emac_phy_connect(struct net_device *dev)
+{
+	struct phy_device *phydev;
+	struct device_node *np;
+	struct emac_priv *priv = netdev_priv(dev);
+
+	np = of_parse_phandle(priv->pdev->dev.of_node, "phy-handle", 0);
+	if (!np && of_phy_is_fixed_link(priv->pdev->dev.of_node))
+		np = of_node_get(priv->pdev->dev.of_node);
+	if (!np)
+		return -ENODEV;
+
+	of_get_phy_mode(np, &priv->phy_interface);
+	pr_info("priv phy_interface = %d\n", priv->phy_interface);
+
+	emac_phy_interface_config(priv);
+
+	phydev = of_phy_connect(dev, np,
+				&emac_adjust_link, 0, priv->phy_interface);
+	if (IS_ERR_OR_NULL(phydev)) {
+		pr_err("Could not attach to PHY\n");
+		if (!phydev)
+			return -ENODEV;
+		return PTR_ERR(phydev);
+	}
+
+	pr_info("%s:  %s: attached to PHY (UID 0x%x)"
+			" Link = %d\n", __func__,
+			dev->name, phydev->phy_id, phydev->link);
+
+	dev->phydev = phydev;
+
+	clk_phase_set(priv, TX_PHASE);
+	clk_phase_set(priv, RX_PHASE);
+	return 0;
+}
+
+static int emac_mdio_init(struct emac_priv *priv)
+{
+	struct device_node *mii_np;
+	struct device *dev = &priv->pdev->dev;
+	int ret;
+
+	mii_np = of_get_child_by_name(dev->of_node, "mdio-bus");
+	if (!mii_np) {
+		if (of_phy_is_fixed_link(dev->of_node)) {
+			if ((of_phy_register_fixed_link(dev->of_node) < 0)) {
+				return -ENODEV;
+			}
+			dev_dbg(dev, "find fixed link\n");
+			return 0;
+		}
+
+		dev_err(dev, "no %s child node found", "mdio-bus");
+		return -ENODEV;
+	}
+
+	if (!of_device_is_available(mii_np)) {
+		ret = -ENODEV;
+		goto err_put_node;
+	}
+
+	priv->mii = devm_mdiobus_alloc(dev);
+	if (!priv->mii) {
+		ret = -ENOMEM;
+		goto err_put_node;
+	}
+	priv->mii->priv = priv;
+	priv->mii->name = "emac mii";
+	priv->mii->reset = emac_mii_reset;
+	priv->mii->read = emac_mii_read;
+	priv->mii->write = emac_mii_write;
+	snprintf(priv->mii->id, MII_BUS_ID_SIZE, "%s",
+			priv->pdev->name);
+	priv->mii->parent = dev;
+	priv->mii->phy_mask = 0xffffffff;
+	ret = of_mdiobus_register(priv->mii, mii_np);
+	if (ret) {
+		dev_err(dev, "Failed to register mdio bus.\n");
+		goto err_put_node;
+	}
+
+	priv->phy = phy_find_first(priv->mii);
+	if (!priv->phy) {
+		dev_err(dev, "no PHY found\n");
+		return -ENODEV;
+	}
+
+	/* Indicate that the MAC is responsible for PHY PM */
+	priv->phy->mac_managed_pm = true;
+err_put_node:
+	of_node_put(mii_np);
+	return ret;
+}
+
+static int emac_mdio_deinit(struct emac_priv *priv)
+{
+	if (!priv->mii)
+		return 0;
+
+	mdiobus_unregister(priv->mii);
+	return 0;
+}
+
+static int emac_get_ts_info(struct net_device *dev,
+			      struct ethtool_ts_info *info)
+{
+	struct emac_priv *priv = netdev_priv(dev);
+
+	if (priv->ptp_support) {
+
+		info->so_timestamping = SOF_TIMESTAMPING_TX_SOFTWARE |
+					SOF_TIMESTAMPING_TX_HARDWARE |
+					SOF_TIMESTAMPING_RX_SOFTWARE |
+					SOF_TIMESTAMPING_RX_HARDWARE |
+					SOF_TIMESTAMPING_SOFTWARE |
+					SOF_TIMESTAMPING_RAW_HARDWARE;
+
+		if (priv->ptp_clock)
+			info->phc_index = ptp_clock_index(priv->ptp_clock);
+
+		info->tx_types = (1 << HWTSTAMP_TX_OFF) | (1 << HWTSTAMP_TX_ON);
+
+		info->rx_filters = ((1 << HWTSTAMP_FILTER_NONE) |
+				    (1 << HWTSTAMP_FILTER_PTP_V1_L4_EVENT) |
+				    (1 << HWTSTAMP_FILTER_PTP_V1_L4_SYNC) |
+				    (1 << HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ) |
+				    (1 << HWTSTAMP_FILTER_PTP_V2_L4_EVENT) |
+				    (1 << HWTSTAMP_FILTER_PTP_V2_L4_SYNC) |
+				    (1 << HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ) |
+				    (1 << HWTSTAMP_FILTER_PTP_V2_EVENT) |
+				    (1 << HWTSTAMP_FILTER_PTP_V2_SYNC) |
+				    (1 << HWTSTAMP_FILTER_PTP_V2_DELAY_REQ) |
+				    (1 << HWTSTAMP_FILTER_ALL));
+		return 0;
+	} else
+		return ethtool_op_get_ts_info(dev, info);
+}
+
+static void emac_get_strings(struct net_device *dev, u32 stringset, u8 *data)
+{
+	int i;
+
+	switch (stringset) {
+	case ETH_SS_STATS:
+		for (i = 0; i < ARRAY_SIZE(emac_ethtool_stats); i++) {
+			memcpy(data, emac_ethtool_stats[i].str, ETH_GSTRING_LEN);
+			data += ETH_GSTRING_LEN;
+		}
+	break;
+	}
+}
+
+static int emac_get_sset_count(struct net_device *dev, int sset)
+{
+	switch (sset) {
+	case ETH_SS_STATS:
+		return ARRAY_SIZE(emac_ethtool_stats);
+	default:
+		return -EOPNOTSUPP;
+	}
+}
+
+static void emac_stats_update(struct emac_priv *priv)
+{
+	struct emac_hw_stats *hwstats = priv->hw_stats;
+	int i;
+	u32 *p;
+
+	p = (u32 *)(hwstats);
+
+	for (i = 0; i < MAX_TX_STATS_NUM; i++)
+		*(p + i) = ReadTxStatCounters(priv, i);
+
+	p = (u32 *)hwstats + MAX_TX_STATS_NUM;
+
+	for (i = 0; i < MAX_RX_STATS_NUM; i++)
+		*(p + i) = ReadRxStatCounters(priv, i);
+}
+
+static void emac_get_ethtool_stats(struct net_device *dev,
+				   struct ethtool_stats *stats, u64 *data)
+{
+	struct emac_priv *priv = netdev_priv(dev);
+	struct emac_hw_stats *hwstats = priv->hw_stats;
+	u32 *data_src;
+	u64 *data_dst;
+	int i;
+
+	if (netif_running(dev) && netif_device_present(dev)) {
+		if (spin_trylock_bh(&hwstats->stats_lock)) {
+			emac_stats_update(priv);
+			spin_unlock_bh(&hwstats->stats_lock);
+		}
+	}
+
+	data_dst = data;
+
+	for (i = 0; i < ARRAY_SIZE(emac_ethtool_stats); i++) {
+		data_src = (u32 *)hwstats + emac_ethtool_stats[i].offset;
+		*data_dst++ = (u64)(*data_src);
+	}
+}
+
+static int emac_ethtool_get_regs_len(struct net_device *dev)
+{
+	return EMAC_REG_SPACE_SIZE;
+}
+
+static void emac_ethtool_get_regs(struct net_device *dev,
+				  struct ethtool_regs *regs, void *space)
+{
+	struct emac_priv *priv = netdev_priv(dev);
+	u32 *reg_space = (u32 *) space;
+	void __iomem *base = priv->iobase;
+	int i;
+
+	regs->version = 1;
+
+	memset(reg_space, 0x0, EMAC_REG_SPACE_SIZE);
+
+	for (i = 0; i < EMAC_DMA_REG_CNT; i++)
+		reg_space[i] = readl(base + DMA_CONFIGURATION + i * 4);
+
+	for (i = 0; i < EMAC_MAC_REG_CNT; i++)
+		reg_space[i + EMAC_DMA_REG_CNT] = readl(base + MAC_GLOBAL_CONTROL + i * 4);
+}
+
+static int emac_get_link_ksettings(struct net_device *ndev,
+					struct ethtool_link_ksettings *cmd)
+{
+	if (!ndev->phydev)
+                return -ENODEV;
+
+	phy_ethtool_ksettings_get(ndev->phydev, cmd);
+	return 0;
+}
+
+static int emac_set_link_ksettings(struct net_device *ndev,
+					const struct ethtool_link_ksettings *cmd)
+{
+	if (!ndev->phydev)
+                return -ENODEV;
+
+	return phy_ethtool_ksettings_set(ndev->phydev, cmd);
+}
+
+static void emac_get_drvinfo(struct net_device *dev,
+				struct ethtool_drvinfo *info)
+{
+	strlcpy(info->driver, DRIVER_NAME, sizeof(info->driver));
+	info->n_stats = ARRAY_SIZE(emac_ethtool_stats);
+}
+
+static const struct ethtool_ops emac_ethtool_ops = {
+	.get_link_ksettings     = emac_get_link_ksettings,
+	.set_link_ksettings     = emac_set_link_ksettings,
+	.get_drvinfo            = emac_get_drvinfo,
+	.nway_reset             = phy_ethtool_nway_reset,
+	.get_link               = ethtool_op_get_link,
+	.get_strings            = emac_get_strings,
+	.get_sset_count         = emac_get_sset_count,
+	.get_ethtool_stats      = emac_get_ethtool_stats,
+	.get_regs		= emac_ethtool_get_regs,
+	.get_regs_len		= emac_ethtool_get_regs_len,
+	.get_ts_info 		= emac_get_ts_info,
+};
+
+static const struct net_device_ops emac_netdev_ops = {
+	.ndo_open               = emac_open,
+	.ndo_stop               = emac_close,
+	.ndo_start_xmit         = emac_start_xmit,
+	.ndo_set_mac_address    = emac_set_mac_address,
+	.ndo_do_ioctl           = emac_ioctl,
+	.ndo_eth_ioctl          = emac_ioctl,
+	.ndo_change_mtu         = emac_change_mtu,
+	.ndo_tx_timeout         = emac_tx_timeout,
+	.ndo_set_rx_mode        = emac_rx_mode_set,
+};
+
+static int emac_config_dt(struct platform_device *pdev, struct emac_priv *priv)
+{
+	struct device_node *np = pdev->dev.of_node;
+	struct resource *res;
+	u8 mac_addr[ETH_ALEN] = {0};
+	u32 tx_phase, rx_phase;
+	u32 ctrl_reg;
+	int ret;
+#ifdef CONFIG_DEBUG_FS
+	struct dentry *emac_fs_dir = NULL;
+	struct dentry *emac_clk_tuning;
+#endif
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	priv->iobase = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR(priv->iobase)) {
+		dev_err(&pdev->dev, "failed to io remap res reg 0\n");
+		return -ENOMEM;
+	}
+
+	if (of_property_read_u32(np, "k1x,apmu-base-reg", &priv->apmu_base)) {
+		priv->apmu_base = PMUA_BASE_REG;
+	}
+
+	priv->irq = irq_of_parse_and_map(np, 0);
+	if (!priv->irq) {
+		return -ENXIO;
+	}
+
+	if (of_property_read_u32(np, "ctrl-reg", &ctrl_reg)) {
+		dev_err(&pdev->dev, "cannot find ctrl register in device tree\n");
+		return -EINVAL;
+	}
+
+	priv->ctrl_reg = ioremap(priv->apmu_base + ctrl_reg, 4);
+
+	if (of_property_read_u32(np, "tx-threshold",
+				 &priv->tx_threshold)) {
+		priv->tx_threshold = DEFAULT_TX_THRESHOLD;
+		dev_dbg(&pdev->dev, "%s tx_threshold using default value:%d \n",
+			__func__, priv->tx_threshold);
+	}
+
+	if (of_property_read_u32(np, "rx-threshold",
+				 &priv->rx_threshold)) {
+		priv->rx_threshold = DEFAULT_RX_THRESHOLD;
+		dev_dbg(&pdev->dev, "%s rx_threshold using default value:%d \n",
+			__func__, priv->rx_threshold);
+	}
+
+	if (of_property_read_u32(np, "tx-ring-num",
+				 &priv->tx_ring_num)) {
+		priv->tx_ring_num = DEFAULT_TX_RING_NUM;
+		dev_dbg(&pdev->dev, "%s tx_ring_num using default value:%d \n",
+			__func__, priv->tx_ring_num);
+	}
+
+	if (of_property_read_u32(np, "rx-ring-num",
+				 &priv->rx_ring_num)) {
+		priv->rx_ring_num = DEFAULT_RX_RING_NUM;
+		dev_dbg(&pdev->dev, "%s rx_ring_num using default value:%d \n",
+			__func__, priv->rx_ring_num);
+	}
+
+	if (of_property_read_u32(np, "dma-burst-len",
+				 &priv->dma_burst_len)) {
+		priv->dma_burst_len = DEFAULT_DMA_BURST_LEN;
+		dev_dbg(&pdev->dev, "%s dma_burst_len using default value:%d \n",
+			__func__, priv->dma_burst_len);
+	} else {
+		if (priv->dma_burst_len <= 0 && priv->dma_burst_len > 7) {
+			dev_err(&pdev->dev, "%s burst len illegal, use default vallue:%d\n",
+				__func__, DEFAULT_DMA_BURST_LEN);
+			priv->dma_burst_len = DEFAULT_DMA_BURST_LEN;
+		}
+	}
+
+	if (of_property_read_bool(np, "ref-clock-from-phy")) {
+		priv->ref_clk_frm_soc = 0;
+		dev_dbg(&pdev->dev, "%s ref clock from external phy \n", __func__);
+	} else
+		priv->ref_clk_frm_soc = 1;
+
+	ret = of_get_mac_address(np, mac_addr);
+	if (ret) {
+		if (ret == -EPROBE_DEFER)
+			return ret;
+
+		dev_info(&pdev->dev, "Using random mac address\n");
+		eth_hw_addr_random(priv->ndev);
+	} else {
+		eth_hw_addr_set(priv->ndev, mac_addr);
+	}
+
+	dev_dbg(&pdev->dev, "%s tx-threshold:%d rx_therhold:%d tx_ring_num:%d rx_ring_num:%d dma-bur_len:%d\n",
+		__func__, priv->tx_threshold, priv->rx_threshold, priv->tx_ring_num,
+		priv->rx_ring_num, priv->dma_burst_len);
+
+	priv->ptp_support = of_property_read_bool(np, "ptp-support");
+	if (priv->ptp_support) {
+		dev_dbg(&pdev->dev, "EMAC support IEEE1588 PTP Protocol\n");
+		if (of_property_read_u32(np, "ptp-clk-rate",
+					&priv->ptp_clk_rate)) {
+			priv->ptp_clk_rate = 20000000;
+			dev_dbg(&pdev->dev, "%s ptp_clk rate using default value:%d may inaccurate!!1\n",
+				__func__, priv->ptp_clk_rate);
+		}
+	}
+	priv->clk_tuning_enable = of_property_read_bool(np, "clk-tuning-enable");
+	if (priv->clk_tuning_enable) {
+		if (of_property_read_bool(np, "clk-tuning-by-reg"))
+			priv->clk_tuning_way = CLK_TUNING_BY_REG;
+		else if (of_property_read_bool(np, "clk-tuning-by-clk-revert"))
+			priv->clk_tuning_way = CLK_TUNING_BY_CLK_REVERT;
+		else if (of_property_read_bool(np, "clk-tuning-by-delayline")) {
+			priv->clk_tuning_way = CLK_TUNING_BY_DLINE;
+			if (of_property_read_u32(np, "dline-reg", &ctrl_reg)) {
+				dev_err(&pdev->dev, "cannot find delayline register in device tree\n");
+				return -EINVAL;
+			}
+			priv->dline_reg = ioremap(priv->apmu_base + ctrl_reg, 4);
+		} else
+			priv->clk_tuning_way = CLK_TUNING_BY_REG;
+
+		if (of_property_read_u32(np, "tx-phase", &tx_phase))
+			priv->tx_clk_phase = TXCLK_PHASE_DEFAULT;
+		else
+			priv->tx_clk_phase = tx_phase;
+
+		if (of_property_read_u32(np, "rx-phase", &rx_phase))
+			priv->rx_clk_phase = RXCLK_PHASE_DEFAULT;
+		else
+			priv->rx_clk_phase = rx_phase;
+
+#ifdef CONFIG_DEBUG_FS
+		if (!emac_fs_dir) {
+			emac_fs_dir = debugfs_create_dir(pdev->name, NULL);
+
+			if (!emac_fs_dir || IS_ERR(emac_fs_dir)) {
+				pr_err("emac debugfs create directory failed\n");
+			}else {
+				emac_clk_tuning = debugfs_create_file("clk_tuning", 0664,
+								      emac_fs_dir, priv, &clk_tuning_fops);
+				if (!emac_clk_tuning) {
+					pr_err("emac debugfs create file failed\n");
+				}
+			}
+		}
+#endif
+	}
+
+	return 0;
+}
+
+static int emac_probe(struct platform_device *pdev)
+{
+	struct emac_priv *priv;
+	struct net_device *ndev = NULL;
+	int ret;
+
+	ndev = alloc_etherdev(sizeof(struct emac_priv));
+	if (!ndev)
+		return -ENOMEM;
+
+	ndev->hw_features = NETIF_F_SG;
+	ndev->features |= ndev->hw_features;
+	priv = netdev_priv(ndev);
+	priv->ndev = ndev;
+	priv->pdev = pdev;
+	platform_set_drvdata(pdev, priv);
+	priv->hw_stats = devm_kzalloc(&pdev->dev,
+					sizeof(*priv->hw_stats), GFP_KERNEL);
+	if (!priv->hw_stats) {
+		dev_err(&pdev->dev, "failed to allocate counter memory\n");
+		ret = -ENOMEM;
+		goto err_netdev;
+	}
+
+	ret = emac_config_dt(pdev, priv);
+	if (ret < 0) {
+		dev_err(&pdev->dev, "failed to config dt\n");
+		goto err_netdev;
+	}
+
+	ndev->watchdog_timeo = 5 * HZ;
+	ndev->base_addr = (unsigned long)priv->iobase;
+	ndev->irq  = priv->irq;
+
+	ndev->ethtool_ops = &emac_ethtool_ops;
+	ndev->netdev_ops = &emac_netdev_ops;
+
+#ifdef CONFIG_PM_SLEEP
+	pm_runtime_enable(&pdev->dev);
+#endif
+
+	priv->mac_clk = devm_clk_get(&pdev->dev, "emac-clk");
+	if (IS_ERR(priv->mac_clk)) {
+		dev_err(&pdev->dev, "emac clock not found.\n");
+		ret = PTR_ERR(priv->mac_clk);
+		goto err_netdev;
+	}
+
+	ret = clk_prepare_enable(priv->mac_clk);
+	if (ret < 0) {
+		dev_err(&pdev->dev, "failed to enable emac clock: %d\n",
+			ret);
+		goto err_netdev;
+	}
+
+	if (priv->ref_clk_frm_soc) {
+		priv->phy_clk = devm_clk_get(&pdev->dev, "phy-clk");
+		if (IS_ERR(priv->phy_clk)) {
+			dev_err(&pdev->dev, "phy clock not found.\n");
+			ret = PTR_ERR(priv->phy_clk);
+			goto mac_clk_disable;
+		}
+
+		ret = clk_prepare_enable(priv->phy_clk);
+		if (ret < 0) {
+			dev_err(&pdev->dev, "failed to enable phy clock: %d\n",
+				ret);
+			goto mac_clk_disable;
+		}
+	}
+	if (priv->ptp_support) {
+		priv->ptp_clk = devm_clk_get(&pdev->dev, "ptp-clk");
+		if (IS_ERR(priv->ptp_clk)) {
+			dev_err(&pdev->dev, "ptp clock not found.\n");
+			ret = PTR_ERR(priv->ptp_clk);
+			goto phy_clk_disable;
+		}
+	}
+
+	priv->reset = devm_reset_control_get_optional(&pdev->dev, NULL);
+	if (IS_ERR(priv->reset)) {
+		dev_err(&pdev->dev, "Failed to get emac's resets\n");
+		goto ptp_clk_disable;
+	}
+
+	reset_control_deassert(priv->reset);
+
+	emac_sw_init(priv);
+
+	ret = emac_mdio_init(priv);
+	if (ret) {
+		dev_err(&pdev->dev, "failed to init mdio.\n");
+		goto reset_assert;
+	}
+
+	SET_NETDEV_DEV(ndev, &pdev->dev);
+
+	ret = register_netdev(ndev);
+	if (ret) {
+		pr_err("register_netdev failed\n");
+		goto err_mdio_deinit;
+	}
+	dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
+
+	netif_napi_add(ndev, &priv->napi, emac_rx_poll);
+
+	if (priv->ref_clk_frm_soc)
+		clk_disable_unprepare(priv->phy_clk);
+	clk_disable_unprepare(priv->mac_clk);
+
+	return 0;
+err_mdio_deinit:
+	emac_mdio_deinit(priv);
+reset_assert:
+	reset_control_assert(priv->reset);
+ptp_clk_disable:
+	if (priv->ptp_support)
+		clk_disable_unprepare(priv->ptp_clk);
+phy_clk_disable:
+	if (priv->ref_clk_frm_soc)
+		clk_disable_unprepare(priv->phy_clk);
+	del_timer_sync(&priv->txtimer);
+mac_clk_disable:
+	clk_disable_unprepare(priv->mac_clk);
+err_netdev:
+	free_netdev(ndev);
+#ifdef CONFIG_PM_SLEEP
+	pm_runtime_disable(&pdev->dev);
+#endif
+    dev_info(&pdev->dev, "emac_probe failed ret = %d.\n", ret);
+	return ret;
+}
+
+static int emac_remove(struct platform_device *pdev)
+{
+	struct emac_priv *priv = platform_get_drvdata(pdev);
+
+	unregister_netdev(priv->ndev);
+	emac_reset_hw(priv);
+	free_netdev(priv->ndev);
+	emac_mdio_deinit(priv);
+	reset_control_assert(priv->reset);
+	clk_disable_unprepare(priv->mac_clk);
+	if (priv->ref_clk_frm_soc)
+		clk_disable_unprepare(priv->phy_clk);
+	return 0;
+}
+
+static void emac_shutdown(struct platform_device *pdev)
+{
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int emac_resume(struct device *dev)
+{
+	struct emac_priv *priv = dev_get_drvdata(dev);
+	struct net_device *ndev = priv->ndev;
+
+	if (!netif_running(ndev))
+		return 0;
+
+	emac_open(ndev);
+	netif_device_attach(ndev);
+	return 0;
+}
+
+static int emac_suspend(struct device *dev)
+{
+	struct emac_priv *priv = dev_get_drvdata(dev);
+	struct net_device *ndev = priv->ndev;
+
+
+	if (!ndev || !netif_running(ndev))
+		return 0;
+
+	emac_close(ndev);
+	netif_device_detach(ndev);
+	return 0;
+}
+
+#else
+#define emac_resume NULL
+#define emac_suspend NULL
+#endif
+
+static const struct dev_pm_ops k1x_emac_pm_qos = {
+        .suspend = emac_suspend,
+        .resume = emac_resume,
+};
+
+static const struct of_device_id emac_of_match[] = {
+	{ .compatible = "spacemit,k1x-emac" },
+	{ },
+};
+MODULE_DEVICE_TABLE(of, emac_of_match);
+
+static struct platform_driver emac_driver = {
+	.probe = emac_probe,
+	.remove = emac_remove,
+	.shutdown = emac_shutdown,
+	.driver = {
+		.name = DRIVER_NAME,
+		.of_match_table = of_match_ptr(emac_of_match),
+		.pm     = &k1x_emac_pm_qos,
+	},
+};
+
+module_platform_driver(emac_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Ethernet driver for Spacemit k1x Emac");
+MODULE_ALIAS("platform:spacemit_eth");
diff --git a/drivers/net/ethernet/spacemit/k1x-emac.h b/drivers/net/ethernet/spacemit/k1x-emac.h
new file mode 100755
index 000000000000..fb74de9d5f4e
--- /dev/null
+++ b/drivers/net/ethernet/spacemit/k1x-emac.h
@@ -0,0 +1,723 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
+#ifndef _K1X_EMAC_H_
+#define _K1X_EMAC_H_
+#include <linux/bitops.h>
+#include <linux/ptp_clock_kernel.h>
+
+
+#define PHY_INTF_RGMII					BIT(2)
+
+/*
+ * only valid for rmii mode
+ * 0: ref clock from external phy
+ * 1: ref clock from soc
+ */
+#define REF_CLK_SEL					BIT(3)
+
+/*
+ * emac function clock select
+ * 0: 208M
+ * 1: 312M
+ */
+#define FUNC_CLK_SEL					BIT(4)
+
+/* only valid for rmii, invert tx clk */
+#define RMII_TX_CLK_SEL					BIT(6)
+
+/* only valid for rmii, invert rx clk */
+#define RMII_RX_CLK_SEL					BIT(7)
+
+/*
+ * only valid for rgmiii
+ * 0: tx clk from rx clk
+ * 1: tx clk from soc
+ */
+#define RGMII_TX_CLK_SEL				BIT(8)
+
+#define PHY_IRQ_EN					BIT(12)
+#define AXI_SINGLE_ID					BIT(13)
+
+#define RMII_TX_PHASE_OFFSET				(16)
+#define RMII_TX_PHASE_MASK				GENMASK(18, 16)
+#define RMII_RX_PHASE_OFFSET				(20)
+#define RMII_RX_PHASE_MASK				GENMASK(22, 20)
+
+#define RGMII_TX_PHASE_OFFSET				(24)
+#define RGMII_TX_PHASE_MASK				GENMASK(26, 24)
+#define RGMII_RX_PHASE_OFFSET				(28)
+#define RGMII_RX_PHASE_MASK				GENMASK(30, 28)
+
+#define EMAC_RX_DLINE_EN				BIT(0)
+#define EMAC_RX_DLINE_STEP_OFFSET			(4)
+#define EMAC_RX_DLINE_STEP_MASK				GENMASK(5, 4)
+#define EMAC_RX_DLINE_CODE_OFFSET			(8)
+#define EMAC_RX_DLINE_CODE_MASK				GENMASK(15, 8)
+
+#define EMAC_TX_DLINE_EN				BIT(16)
+#define EMAC_TX_DLINE_STEP_OFFSET			(20)
+#define EMAC_TX_DLINE_STEP_MASK				GENMASK(21, 20)
+#define EMAC_TX_DLINE_CODE_OFFSET			(24)
+#define EMAC_TX_DLINE_CODE_MASK				GENMASK(31, 24)
+
+/* DMA register set */
+#define DMA_CONFIGURATION				0x0000
+#define DMA_CONTROL					0x0004
+#define DMA_STATUS_IRQ					0x0008
+#define DMA_INTERRUPT_ENABLE				0x000C
+
+#define DMA_TRANSMIT_AUTO_POLL_COUNTER			0x0010
+#define DMA_TRANSMIT_POLL_DEMAND			0x0014
+#define DMA_RECEIVE_POLL_DEMAND				0x0018
+
+#define DMA_TRANSMIT_BASE_ADDRESS			0x001C
+#define DMA_RECEIVE_BASE_ADDRESS			0x0020
+#define DMA_MISSED_FRAME_COUNTER			0x0024
+#define DMA_STOP_FLUSH_COUNTER				0x0028
+
+#define DMA_RECEIVE_IRQ_MITIGATION_CTRL			0x002C
+
+#define DMA_CURRENT_TRANSMIT_DESCRIPTOR_POINTER		0x0030
+#define DMA_CURRENT_TRANSMIT_BUFFER_POINTER		0x0034
+#define DMA_CURRENT_RECEIVE_DESCRIPTOR_POINTER		0x0038
+#define DMA_CURRENT_RECEIVE_BUFFER_POINTER		0x003C
+
+/* MAC Register set */
+#define MAC_GLOBAL_CONTROL				0x0100
+#define MAC_TRANSMIT_CONTROL				0x0104
+#define MAC_RECEIVE_CONTROL				0x0108
+#define MAC_MAXIMUM_FRAME_SIZE				0x010C
+#define MAC_TRANSMIT_JABBER_SIZE			0x0110
+#define MAC_RECEIVE_JABBER_SIZE				0x0114
+#define MAC_ADDRESS_CONTROL				0x0118
+#define MAC_ADDRESS1_HIGH				0x0120
+#define MAC_ADDRESS1_MED				0x0124
+#define MAC_ADDRESS1_LOW				0x0128
+#define MAC_ADDRESS2_HIGH				0x012C
+#define MAC_ADDRESS2_MED				0x0130
+#define MAC_ADDRESS2_LOW				0x0134
+#define MAC_ADDRESS3_HIGH				0x0138
+#define MAC_ADDRESS3_MED				0x013C
+#define MAC_ADDRESS3_LOW				0x0140
+#define MAC_ADDRESS4_HIGH				0x0144
+#define MAC_ADDRESS4_MED				0x0148
+#define MAC_ADDRESS4_LOW				0x014C
+#define MAC_MULTICAST_HASH_TABLE1			0x0150
+#define MAC_MULTICAST_HASH_TABLE2			0x0154
+#define MAC_MULTICAST_HASH_TABLE3			0x0158
+#define MAC_MULTICAST_HASH_TABLE4			0x015C
+#define MAC_FC_CONTROL					0x0160
+#define MAC_FC_PAUSE_FRAME_GENERATE			0x0164
+#define MAC_FC_SOURCE_ADDRESS_HIGH			0x0168
+#define MAC_FC_SOURCE_ADDRESS_MED			0x016C
+#define MAC_FC_SOURCE_ADDRESS_LOW			0x0170
+#define MAC_FC_DESTINATION_ADDRESS_HIGH			0x0174
+#define MAC_FC_DESTINATION_ADDRESS_MED			0x0178
+#define MAC_FC_DESTINATION_ADDRESS_LOW			0x017C
+#define MAC_FC_PAUSE_TIME_VALUE				0x0180
+#define MAC_MDIO_CONTROL				0x01A0
+#define MAC_MDIO_DATA					0x01A4
+#define MAC_RX_STATCTR_CONTROL				0x01A8
+#define MAC_RX_STATCTR_DATA_HIGH			0x01AC
+#define MAC_RX_STATCTR_DATA_LOW				0x01B0
+#define MAC_TX_STATCTR_CONTROL				0x01B4
+#define MAC_TX_STATCTR_DATA_HIGH			0x01B8
+#define MAC_TX_STATCTR_DATA_LOW				0x01BC
+#define MAC_TRANSMIT_FIFO_ALMOST_FULL			0x01C0
+#define MAC_TRANSMIT_PACKET_START_THRESHOLD		0x01C4
+#define MAC_RECEIVE_PACKET_START_THRESHOLD		0x01C8
+#define MAC_STATUS_IRQ					0x01E0
+#define MAC_INTERRUPT_ENABLE				0x01E4
+
+/* DMA_CONFIGURATION (0x0000) register bit info
+ * 0-DMA controller in normal operation mode,
+ * 1-DMA controller reset to default state,
+ * clearing all internal state information
+ */
+#define MREGBIT_SOFTWARE_RESET				BIT(0)
+#define MREGBIT_BURST_1WORD				BIT(1)
+#define MREGBIT_BURST_2WORD				BIT(2)
+#define MREGBIT_BURST_4WORD				BIT(3)
+#define MREGBIT_BURST_8WORD				BIT(4)
+#define MREGBIT_BURST_16WORD				BIT(5)
+#define MREGBIT_BURST_32WORD				BIT(6)
+#define MREGBIT_BURST_64WORD				BIT(7)
+#define MREGBIT_BURST_LENGTH				GENMASK(7, 1)
+#define MREGBIT_DESCRIPTOR_SKIP_LENGTH			GENMASK(12, 8)
+/* For Receive and Transmit DMA operate in Big-Endian mode for Descriptors. */
+#define MREGBIT_DESCRIPTOR_BYTE_ORDERING		BIT(13)
+#define MREGBIT_BIG_LITLE_ENDIAN			BIT(14)
+#define MREGBIT_TX_RX_ARBITRATION			BIT(15)
+#define MREGBIT_WAIT_FOR_DONE				BIT(16)
+#define MREGBIT_STRICT_BURST				BIT(17)
+#define MREGBIT_DMA_64BIT_MODE				BIT(18)
+
+/* DMA_CONTROL (0x0004) register bit info */
+#define MREGBIT_START_STOP_TRANSMIT_DMA			BIT(0)
+#define MREGBIT_START_STOP_RECEIVE_DMA			BIT(1)
+
+/* DMA_STATUS_IRQ (0x0008) register bit info */
+#define MREGBIT_TRANSMIT_TRANSFER_DONE_IRQ		BIT(0)
+#define MREGBIT_TRANSMIT_DES_UNAVAILABLE_IRQ		BIT(1)
+#define MREGBIT_TRANSMIT_DMA_STOPPED_IRQ		BIT(2)
+#define MREGBIT_RECEIVE_TRANSFER_DONE_IRQ		BIT(4)
+#define MREGBIT_RECEIVE_DES_UNAVAILABLE_IRQ		BIT(5)
+#define MREGBIT_RECEIVE_DMA_STOPPED_IRQ			BIT(6)
+#define MREGBIT_RECEIVE_MISSED_FRAME_IRQ		BIT(7)
+#define MREGBIT_MAC_IRQ					BIT(8)
+#define MREGBIT_TRANSMIT_DMA_STATE			GENMASK(18, 16)
+#define MREGBIT_RECEIVE_DMA_STATE			GENMASK(23, 20)
+
+/* DMA_INTERRUPT_ENABLE ( 0x000C) register bit info */
+#define MREGBIT_TRANSMIT_TRANSFER_DONE_INTR_ENABLE	BIT(0)
+#define MREGBIT_TRANSMIT_DES_UNAVAILABLE_INTR_ENABLE	BIT(1)
+#define MREGBIT_TRANSMIT_DMA_STOPPED_INTR_ENABLE	BIT(2)
+#define MREGBIT_RECEIVE_TRANSFER_DONE_INTR_ENABLE	BIT(4)
+#define MREGBIT_RECEIVE_DES_UNAVAILABLE_INTR_ENABLE	BIT(5)
+#define MREGBIT_RECEIVE_DMA_STOPPED_INTR_ENABLE		BIT(6)
+#define MREGBIT_RECEIVE_MISSED_FRAME_INTR_ENABLE	BIT(7)
+#define MREGBIT_MAC_INTR_ENABLE				BIT(8)
+
+/* DMA RECEIVE IRQ MITIGATION CONTROL */
+#define MREGBIT_RECEIVE_IRQ_FRAME_COUNTER_MSK		GENMASK(7, 0)
+#define MREGBIT_RECEIVE_IRQ_TIMEOUT_COUNTER_OFST	(8)
+#define MREGBIT_RECEIVE_IRQ_TIMEOUT_COUNTER_MSK		GENMASK(27, 8)
+#define MRGEBIT_RECEIVE_IRQ_FRAME_COUNTER_MODE		BIT(30)
+#define MRGEBIT_RECEIVE_IRQ_MITIGATION_ENABLE		BIT(31)
+
+/* MAC_GLOBAL_CONTROL (0x0100) register bit info */
+#define MREGBIT_SPEED					GENMASK(1, 0)
+#define MREGBIT_SPEED_10M				0x0
+#define MREGBIT_SPEED_100M				BIT(0)
+#define MREGBIT_SPEED_1000M				BIT(1)
+#define MREGBIT_FULL_DUPLEX_MODE			BIT(2)
+#define MREGBIT_RESET_RX_STAT_COUNTERS			BIT(3)
+#define MREGBIT_RESET_TX_STAT_COUNTERS			BIT(4)
+
+/* MAC_TRANSMIT_CONTROL (0x0104) register bit info */
+#define MREGBIT_TRANSMIT_ENABLE				BIT(0)
+#define MREGBIT_INVERT_FCS				BIT(1)
+#define MREGBIT_DISABLE_FCS_INSERT			BIT(2)
+#define MREGBIT_TRANSMIT_AUTO_RETRY			BIT(3)
+#define MREGBIT_IFG_LEN					GENMASK(6, 4)
+#define MREGBIT_PREAMBLE_LENGTH				GENMASK(9, 7)
+
+/* MAC_RECEIVE_CONTROL (0x0108) register bit info */
+#define MREGBIT_RECEIVE_ENABLE				BIT(0)
+#define MREGBIT_DISABLE_FCS_CHECK			BIT(1)
+#define MREGBIT_STRIP_FCS				BIT(2)
+#define MREGBIT_STORE_FORWARD				BIT(3)
+#define MREGBIT_STATUS_FIRST				BIT(4)
+#define MREGBIT_PASS_BAD_FRAMES				BIT(5)
+#define MREGBIT_ACOOUNT_VLAN				BIT(6)
+
+/* MAC_MAXIMUM_FRAME_SIZE (0x010C) register bit info */
+#define MREGBIT_MAX_FRAME_SIZE				GENMASK(13, 0)
+
+/* MAC_TRANSMIT_JABBER_SIZE (0x0110) register bit info */
+#define MREGBIT_TRANSMIT_JABBER_SIZE			GENMASK(15, 0)
+
+/* MAC_RECEIVE_JABBER_SIZE (0x0114) register bit info */
+#define MREGBIT_RECEIVE_JABBER_SIZE			GENMASK(15, 0)
+
+/* MAC_ADDRESS_CONTROL	 (0x0118) register bit info */
+#define MREGBIT_MAC_ADDRESS1_ENABLE			BIT(0)
+#define MREGBIT_MAC_ADDRESS2_ENABLE			BIT(1)
+#define MREGBIT_MAC_ADDRESS3_ENABLE			BIT(2)
+#define MREGBIT_MAC_ADDRESS4_ENABLE			BIT(3)
+#define MREGBIT_INVERSE_MAC_ADDRESS1_ENABLE		BIT(4)
+#define MREGBIT_INVERSE_MAC_ADDRESS2_ENABLE		BIT(5)
+#define MREGBIT_INVERSE_MAC_ADDRESS3_ENABLE		BIT(6)
+#define MREGBIT_INVERSE_MAC_ADDRESS4_ENABLE		BIT(7)
+#define MREGBIT_PROMISCUOUS_MODE			BIT(8)
+
+/* MAC_ADDRESSx_HIGH (0x0120) register bit info */
+#define MREGBIT_MAC_ADDRESS1_01_BYTE			GENMASK(7, 0)
+#define MREGBIT_MAC_ADDRESS1_02_BYTE			GENMASK(15, 8)
+/* MAC_ADDRESSx_MED (0x0124) register bit info */
+#define MREGBIT_MAC_ADDRESS1_03_BYTE			GENMASK(7, 0)
+#define MREGBIT_MAC_ADDRESS1_04_BYTE			GENMASK(15, 8)
+/* MAC_ADDRESSx_LOW (0x0128) register bit info */
+#define MREGBIT_MAC_ADDRESS1_05_BYTE			GENMASK(7, 0)
+#define MREGBIT_MAC_ADDRESS1_06_BYTE			GENMASK(15, 8)
+
+/* MAC_FC_CONTROL (0x0160) register bit info */
+#define MREGBIT_FC_DECODE_ENABLE			BIT(0)
+#define MREGBIT_FC_GENERATION_ENABLE			BIT(1)
+#define MREGBIT_AUTO_FC_GENERATION_ENABLE		BIT(2)
+#define MREGBIT_MULTICAST_MODE				BIT(3)
+#define MREGBIT_BLOCK_PAUSE_FRAMES			BIT(4)
+
+/* MAC_FC_PAUSE_FRAME_GENERATE (0x0164) register bit info */
+#define MREGBIT_GENERATE_PAUSE_FRAME			BIT(0)
+
+/* MAC_FC_SRC/DST_ADDRESS_HIGH (0x0168) register bit info */
+#define MREGBIT_MAC_ADDRESS_01_BYTE			GENMASK(7, 0)
+#define MREGBIT_MAC_ADDRESS_02_BYTE			GENMASK(15, 8)
+/* MAC_FC_SRC/DST_ADDRESS_MED (0x016C) register bit info */
+#define MREGBIT_MAC_ADDRESS_03_BYTE			GENMASK(7, 0)
+#define MREGBIT_MAC_ADDRESS_04_BYTE			GENMASK(15, 8)
+/* MAC_FC_SRC/DSTD_ADDRESS_LOW (0x0170) register bit info */
+#define MREGBIT_MAC_ADDRESS_05_BYTE			GENMASK(7, 0)
+#define MREGBIT_MAC_ADDRESS_06_BYTE			GENMASK(15, 8)
+
+/* MAC_FC_PAUSE_TIME_VALUE (0x0180) register bit info */
+#define MREGBIT_MAC_FC_PAUSE_TIME			GENMASK(15, 0)
+
+/* MAC_MDIO_CONTROL (0x01A0) register bit info */
+#define MREGBIT_PHY_ADDRESS				GENMASK(4, 0)
+#define MREGBIT_REGISTER_ADDRESS			GENMASK(9, 5)
+#define MREGBIT_MDIO_READ_WRITE				BIT(10)
+#define MREGBIT_START_MDIO_TRANS			BIT(15)
+
+/* MAC_MDIO_DATA (0x01A4) register bit info */
+#define MREGBIT_MDIO_DATA				GENMASK(15, 0)
+
+/* MAC_RX_STATCTR_CONTROL (0x01A8) register bit info */
+#define MREGBIT_RX_COUNTER_NUMBER			GENMASK(4, 0)
+#define MREGBIT_START_RX_COUNTER_READ			BIT(15)
+
+/* MAC_RX_STATCTR_DATA_HIGH (0x01AC) register bit info */
+#define MREGBIT_RX_STATCTR_DATA_HIGH			GENMASK(15, 0)
+/* MAC_RX_STATCTR_DATA_LOW (0x01B0) register bit info */
+#define MREGBIT_RX_STATCTR_DATA_LOW			GENMASK(15, 0)
+
+/* MAC_TX_STATCTR_CONTROL (0x01B4) register bit info */
+#define MREGBIT_TX_COUNTER_NUMBER			GENMASK(4, 0)
+#define MREGBIT_START_TX_COUNTER_READ			BIT(15)
+
+/* MAC_TX_STATCTR_DATA_HIGH (0x01B8) register bit info */
+#define MREGBIT_TX_STATCTR_DATA_HIGH			GENMASK(15, 0)
+/* MAC_TX_STATCTR_DATA_LOW (0x01BC) register bit info */
+#define MREGBIT_TX_STATCTR_DATA_LOW			GENMASK(15, 0)
+
+/* MAC_TRANSMIT_FIFO_ALMOST_FULL (0x01C0) register bit info */
+#define MREGBIT_TX_FIFO_AF				GENMASK(13, 0)
+
+/* MAC_TRANSMIT_PACKET_START_THRESHOLD (0x01C4) register bit info */
+#define MREGBIT_TX_PACKET_START_THRESHOLD		GENMASK(13, 0)
+
+/* MAC_RECEIVE_PACKET_START_THRESHOLD (0x01C8) register bit info */
+#define MREGBIT_RX_PACKET_START_THRESHOLD		GENMASK(13, 0)
+
+/* MAC_STATUS_IRQ  (0x01E0) register bit info */
+#define MREGBIT_MAC_UNDERRUN_IRQ			BIT(0)
+#define MREGBIT_MAC_JABBER_IRQ				BIT(1)
+
+/* MAC_INTERRUPT_ENABLE (0x01E4) register bit info */
+#define MREGBIT_MAC_UNDERRUN_INTERRUPT_ENABLE		BIT(0)
+#define MREGBIT_JABBER_INTERRUPT_ENABLE			BIT(1)
+
+/* Receive Descriptors */
+/* MAC_RECEIVE_DESCRIPTOR0 () register bit info */
+#define MREGBIT_FRAME_LENGTH				GENMASK(13, 0)
+#define MREGBIT_APPLICATION_STATUS			GENMASK(28, 14)
+#define MREGBIT_LAST_DESCRIPTOR				BIT(29)
+#define MREGBIT_FIRST_DESCRIPTOR			BIT(30)
+#define MREGBIT_OWN_BIT					BIT(31)
+
+/* MAC_RECEIVE_DESCRIPTOR1 () register bit info */
+#define MREGBIT_BUFFER1_SIZE				GENMASK(11, 0)
+#define MREGBIT_BUFFER2_SIZE				GENMASK(23, 12)
+#define MREGBIT_SECOND_ADDRESS_CHAINED			BIT(25)
+#define MREGBIT_END_OF_RING				BIT(26)
+
+/* MAC_RECEIVE_DESCRIPTOR2 () register bit info */
+#define MREGBIT_BUFFER_ADDRESS1				GENMASK(31, 0)
+
+/* MAC_RECEIVE_DESCRIPTOR3 () register bit info */
+#define MREGBIT_BUFFER_ADDRESS1				GENMASK(31, 0)
+
+/* Transmit Descriptors */
+/* TD_TRANSMIT_DESCRIPTOR0 () register bit info */
+#define MREGBIT_TX_PACKET_STATUS			GENMASK(29, 0)
+#define MREGBIT_OWN_BIT					BIT(31)
+
+/* TD_TRANSMIT_DESCRIPTOR1 () register bit info */
+#define MREGBIT_BUFFER1_SIZE				GENMASK(11, 0)
+#define MREGBIT_BUFFER2_SIZE				GENMASK(23, 12)
+#define MREGBIT_FORCE_EOP_ERROR				BIT(24)
+#define MREGBIT_SECOND_ADDRESS_CHAINED			BIT(25)
+#define MREGBIT_END_OF_RING				BIT(26)
+#define MREGBIT_DISABLE_PADDING				BIT(27)
+#define MREGBIT_ADD_CRC_DISABLE				BIT(28)
+#define MREGBIT_FIRST_SEGMENT				BIT(29)
+#define MREGBIT_LAST_SEGMENT				BIT(30)
+#define MREGBIT_INTERRUPT_ON_COMPLETION			BIT(31)
+
+/* TD_TRANSMIT_DESCRIPTOR2 () register bit info */
+#define MREGBIT_BUFFER_ADDRESS1				GENMASK(31, 0)
+
+/* TD_TRANSMIT_DESCRIPTOR3 () register bit info */
+#define MREGBIT_BUFFER_ADDRESS1				GENMASK(31, 0)
+
+/* RX frame status */
+#define EMAC_RX_FRAME_ALIGN_ERR				BIT(0)
+#define EMAC_RX_FRAME_RUNT				BIT(1)
+#define EMAC_RX_FRAME_ETHERNET_TYPE			BIT(2)
+#define EMAC_RX_FRAME_VLAN				BIT(3)
+#define EMAC_RX_FRAME_MULTICAST				BIT(4)
+#define EMAC_RX_FRAME_BROADCAST				BIT(5)
+#define EMAC_RX_FRAME_CRC_ERR				BIT(6)
+#define EMAC_RX_FRAME_MAX_LEN_ERR			BIT(7)
+#define EMAC_RX_FRAME_JABBER_ERR			BIT(8)
+#define EMAC_RX_FRAME_LENGTH_ERR			BIT(9)
+#define EMAC_RX_FRAME_MAC_ADDR1_MATCH			BIT(10)
+#define EMAC_RX_FRAME_MAC_ADDR2_MATCH			BIT(11)
+#define EMAC_RX_FRAME_MAC_ADDR3_MATCH			BIT(12)
+#define EMAC_RX_FRAME_MAC_ADDR4_MATCH			BIT(13)
+#define EMAC_RX_FRAME_PAUSE_CTRL			BIT(14)
+
+/* emac ptp 1588 register */
+#define PTP_1588_CTRL					(0x300)
+#define TX_TIMESTAMP_EN					BIT(1)
+#define RX_TIMESTAMP_EN					BIT(2)
+#define RX_PTP_PKT_TYPE_OFST				3
+#define RX_PTP_PKT_TYPE_MSK				GENMASK(5, 3)
+
+#define PTP_INRC_ATTR					(0x304)
+#define INRC_VAL_MSK					GENMASK(23, 0)
+#define INCR_PERIOD_OFST				24
+#define INCR_PERIOD_MSK					GENMASK(31, 24)
+
+#define PTP_ETH_TYPE					(0x308)
+#define PTP_ETH_TYPE_MSK				GENMASK(15, 0)
+
+#define PTP_MSG_ID					(0x30c)
+
+#define PTP_UDP_PORT					(0x310)
+#define PTP_UDP_PORT_MSK				GENMASK(15, 0)
+
+/* read current system time from controller */
+#define SYS_TIME_GET_LOW				(0x320)
+#define SYS_TIME_GET_HI					(0x324)
+
+#define SYS_TIME_ADJ_LOW				(0x328)
+#define SYS_TIME_LOW_MSK				GENMASK(31, 0)
+#define SYS_TIME_ADJ_HI					(0x32c)
+#define SYS_TIME_IS_NEG					BIT(31)
+
+#define TX_TIMESTAMP_LOW				(0x330)
+#define TX_TIMESTAMP_HI					(0x334)
+
+#define RX_TIMESTAMP_LOW				(0x340)
+#define RX_TIMESTAMP_HI					(0x344)
+
+#define RX_PTP_PKT_ATTR_LOW				(0x348)
+#define PTP_SEQ_ID_MSK					GENMASK(15, 0)
+#define PTP_SRC_ID_LOW_OFST				16
+#define PTP_SRC_ID_LOW_MSK				GENMASK(31, 16)
+
+#define RX_PTP_PKT_ATTR_MID				(0x34c)
+#define PTP_SRC_ID_MID_MSK				GENMASK(31, 0)
+
+#define RX_PTP_PKT_ATTR_HI				(0x350)
+#define PTP_SRC_ID_HI_MSK				GENMASK(31, 0)
+
+#define PTP_1588_IRQ_STS				(0x360)
+#define PTP_1588_IRQ_EN					(0x364)
+#define PTP_TX_TIMESTAMP				BIT(0)
+#define PTP_RX_TIMESTAMP				BIT(1)
+
+/* emac ptp register */
+
+#define EMAC_DEFAULT_BUFSIZE				1536
+#define EMAC_RX_BUF_2K					2048
+#define EMAC_RX_BUF_4K					4096
+
+#define MAX_DATA_PWR_TX_DES				11
+#define MAX_DATA_LEN_TX_DES				2048 //2048=1<<11
+
+#define MAX_TX_STATS_NUM				12
+#define MAX_RX_STATS_NUM				25
+
+/* The sizes (in bytes) of a ethernet packet */
+#define ETHERNET_HEADER_SIZE				14
+#define MAXIMUM_ETHERNET_FRAME_SIZE			1518  //With FCS
+#define MINIMUM_ETHERNET_FRAME_SIZE			64  //With FCS
+#define ETHERNET_FCS_SIZE				4
+#define MAXIMUM_ETHERNET_PACKET_SIZE \
+		(MAXIMUM_ETHERNET_FRAME_SIZE - ETHERNET_FCS_SIZE)
+
+#define MINIMUM_ETHERNET_PACKET_SIZE \
+		(MINIMUM_ETHERNET_FRAME_SIZE - ETHERNET_FCS_SIZE)
+
+#define CRC_LENGTH					ETHERNET_FCS_SIZE
+#define MAX_JUMBO_FRAME_SIZE				0x3F00
+
+#define TX_STORE_FORWARD_MODE				0x5EE
+
+#define EMAC_TX_FRAMES					64
+/* 40ms */
+#define EMAC_TX_COAL_TIMEOUT				40000
+
+#define EMAC_RX_FRAMES					64
+
+/* axi clk 312M, 1us = 312 cycle,
+ * every packet almost take 120us when operate at 100Mbps
+ * so we set 5 packet delay time which 600us as rx coal timeout
+ */
+#define EMAC_RX_COAL_TIMEOUT				(600 * 312)
+
+/* only works for sizes that are powers of 2 */
+#define EMAC_ROUNDUP(i, size) ((i) = (((i) + (size) - 1) & ~((size) - 1)))
+
+/* number of descriptors are required for len */
+#define EMAC_TXD_COUNT(S, X) (((S) >> (X)) + 1)
+
+/* calculate the number of descriptors unused */
+#define EMAC_DESC_UNUSED(R) \
+	((((R)->nxt_clean > (R)->nxt_use) ? 0 : (R)->total_cnt) + \
+	(R)->nxt_clean - (R)->nxt_use - 1)
+
+typedef struct ifreq  st_ifreq, *pst_ifreq;
+
+enum rx_frame_status {
+	frame_ok = 0,
+	frame_discard,
+	frame_max,
+};
+
+enum rx_ptp_type {
+	PTP_V2_L2_ONLY = 0x0,
+	PTP_V1_L4_ONLY = 0x1,
+	PTP_V2_L2_L4  = 0x2,
+};
+
+enum ptp_event_msg_id {
+	MSG_SYNC = 0x00,
+	MSG_DELAY_REQ = 0x01,
+	MSG_PDELAY_REQ = 0x02,
+	MSG_PDELAY_RESP = 0x03,
+	ALL_EVENTS = 0x03020100,
+};
+
+enum emac_state {
+	EMAC_DOWN,
+	EMAC_RESET_REQUESTED,
+	EMAC_RESETING,
+	EMAC_TASK_SCHED,
+	EMAC_STATE_MAX,
+};
+
+/* Receive Descriptor structure */
+struct emac_rx_desc {
+	u32 FramePacketLength:14;
+	u32 ApplicationStatus:15;
+	u32 LastDescriptor:1;
+	u32 FirstDescriptor:1;
+	u32 OWN:1;
+
+	u32 BufferSize1:12;
+	u32 BufferSize2:12;
+	u32 Reserved1:1;
+	u32 SecondAddressChained:1;
+	u32 EndRing:1;
+	u32 Reserved2:3;
+	u32 rx_timestamp:1;
+	u32 ptp_pkt:1;
+
+	u32 BufferAddr1;
+	u32 BufferAddr2;
+};
+
+/* Transmit Descriptor */
+struct emac_tx_desc {
+	u32 FramePacketStatus:30;
+	u32 tx_timestamp:1;
+	u32 OWN:1;
+
+	u32 BufferSize1:12;
+	u32 BufferSize2:12;
+	u32 ForceEOPError:1;
+	u32 SecondAddressChained:1;
+	u32 EndRing:1;
+	u32 DisablePadding:1;
+	u32 AddCRCDisable:1;
+	u32 FirstSegment:1;
+	u32 LastSegment:1;
+	u32 InterruptOnCompletion:1;
+
+	u32 BufferAddr1;
+	u32 BufferAddr2;
+};
+
+struct desc_buf {
+	u64 dma_addr;
+	void *buff_addr;
+	u16 dma_len;
+	u8 map_as_page;
+};
+
+/* Descriptor buffer structure */
+struct emac_tx_desc_buffer {
+	struct sk_buff *skb;
+	struct desc_buf buf[2];
+	u8 timestamped;
+};
+
+/* Descriptor buffer structure */
+struct emac_desc_buffer {
+	struct sk_buff *skb;
+	u64 dma_addr;
+	void *buff_addr;
+	unsigned long ulTimeStamp;
+	u16 dma_len;
+	u8 map_as_page;
+	u8 timestamped;
+};
+
+/* Descriptor ring structure */
+struct emac_desc_ring {
+	/* virtual memory address to the descriptor ring memory */
+	void *desc_addr;
+	/* physical address of the descriptor ring */
+	dma_addr_t desc_dma_addr;
+	/* length of descriptor ring in bytes */
+	u32 total_size;
+	/* number of descriptors in the ring */
+	u32 total_cnt;
+	/* next descriptor to associate a buffer with */
+	u32 head;
+	/* next descriptor to check for DD status bit */
+	u32 tail;
+	/* array of buffer information structs */
+	union {
+		struct emac_desc_buffer *desc_buf;
+		struct emac_tx_desc_buffer *tx_desc_buf;
+	};
+};
+
+struct emac_hw_stats {
+	u32 tx_ok_pkts;
+	u32 tx_total_pkts;
+	u32 tx_ok_bytes;
+	u32 tx_err_pkts;
+	u32 tx_singleclsn_pkts;
+	u32 tx_multiclsn_pkts;
+	u32 tx_lateclsn_pkts;
+	u32 tx_excessclsn_pkts;
+	u32 tx_unicast_pkts;
+	u32 tx_multicast_pkts;
+	u32 tx_broadcast_pkts;
+	u32 tx_pause_pkts;
+	u32 rx_ok_pkts;
+	u32 rx_total_pkts;
+	u32 rx_crc_err_pkts;
+	u32 rx_align_err_pkts;
+	u32 rx_err_total_pkts;
+	u32 rx_ok_bytes;
+	u32 rx_total_bytes;
+	u32 rx_unicast_pkts;
+	u32 rx_multicast_pkts;
+	u32 rx_broadcast_pkts;
+	u32 rx_pause_pkts;
+	u32 rx_len_err_pkts;
+	u32 rx_len_undersize_pkts;
+	u32 rx_len_oversize_pkts;
+	u32 rx_len_fragment_pkts;
+	u32 rx_len_jabber_pkts;
+	u32 rx_64_pkts;
+	u32 rx_65_127_pkts;
+	u32 rx_128_255_pkts;
+	u32 rx_256_511_pkts;
+	u32 rx_512_1023_pkts;
+	u32 rx_1024_1518_pkts;
+	u32 rx_1519_plus_pkts;
+	u32 rx_drp_fifo_full_pkts;
+	u32 rx_truncate_fifo_full_pkts;
+
+	spinlock_t	stats_lock;
+};
+
+struct emac_hw_ptp {
+        void (*config_hw_tstamping) (void __iomem *base, u32 enable, u8 rx_ptp_type, u32 ptp_msg_id);
+        u32 (*config_systime_increment)(void __iomem *base, u32 ptp_clock, u32 adj_clock);
+        int (*init_systime) (void __iomem *base, u64 set_ns);
+        int (*adjust_systime) (void __iomem *base,  u32 ns, bool is_neg);
+        u64 (*get_systime)(void __iomem *base);
+        u64 (*get_tx_timestamp)(void __iomem *base);
+        u64 (*get_rx_timestamp)(void __iomem *base);
+};
+
+struct emac_priv {
+	u32 dma_buf_sz;
+	u32 wol;
+	spinlock_t spStatsLock;
+	struct work_struct tx_timeout_task;
+	struct emac_desc_ring tx_ring;
+	struct emac_desc_ring rx_ring;
+	spinlock_t spTxLock;
+	struct net_device *ndev;
+	struct napi_struct napi;
+	struct platform_device *pdev;
+	struct clk *mac_clk;
+	struct clk *phy_clk;
+	struct clk *ptp_clk;
+	struct reset_control *reset;
+	void __iomem *iobase;
+	u32 apmu_base;
+	int irq;
+	int link;
+	int duplex;
+	int speed;
+	phy_interface_t phy_interface;
+	struct mii_bus *mii;
+	struct phy_device *phy;
+	struct emac_hw_stats *hw_stats;
+	u8 tx_clk_phase;
+	u8 rx_clk_phase;
+	u8 clk_tuning_way;
+	bool clk_tuning_enable;
+	unsigned long state;
+	u32 tx_threshold;
+	u32 rx_threshold;
+	u32 tx_ring_num;
+	u32 rx_ring_num;
+	u32 dma_burst_len;
+	u32 ref_clk_frm_soc;
+	void __iomem *ctrl_reg;
+	void __iomem *dline_reg;
+	s32 lpm_qos;
+	u32 tx_count_frames;
+	u32 tx_coal_frames;
+	u32 tx_coal_timeout;
+	struct timer_list txtimer;
+	struct ptp_clock *ptp_clock;
+	struct ptp_clock_info ptp_clock_ops;
+	spinlock_t ptp_lock;
+	int ptp_support;
+	u32 ptp_clk_rate;
+	int hwts_tx_en;
+	int hwts_rx_en;
+	struct emac_hw_ptp *hwptp;
+};
+
+
+static inline void emac_wr(struct emac_priv *priv, u32 reg, u32 val)
+{
+	writel(val, (priv->iobase + reg));
+}
+
+static inline int emac_rd(struct emac_priv *priv, u32 reg)
+{
+	return readl(priv->iobase + reg);
+}
+
+int emac_init_hw(struct emac_priv *priv);
+int emac_reset_hw(struct emac_priv *priv);
+int emac_set_mac_addr(struct emac_priv *priv, const unsigned char *addr);
+int emac_down(struct emac_priv *priv);
+void emac_command_options(struct emac_priv *priv);
+int emac_alloc_tx_resources(struct emac_priv *priv);
+int emac_alloc_rx_resources(struct emac_priv *priv);
+void emac_free_tx_resources(struct emac_priv *priv);
+void emac_free_rx_resources(struct emac_priv *priv);
+u32 ReadRxStatCounters(struct emac_priv *priv, u8 cnt);
+u32 ReadTxStatCounters(struct emac_priv *priv, u8 cnt);
+
+extern void emac_ptp_register(struct emac_priv *priv);
+extern void emac_ptp_unregister(struct emac_priv *priv);
+void emac_ptp_init(struct emac_priv *priv);
+void emac_ptp_deinit(struct emac_priv *priv);
+#endif /* _K1X_EMAC_H_ */