Adding upstream version 6.1.76.upstream/6.1.76

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 3117 insertions, 0 deletions

diff --git a/drivers/net/ethernet/renesas/ravb_main.c b/drivers/net/ethernet/renesas/ravb_main.c
new file mode 100644
index 000000000..e7b700062
--- /dev/null
+++ b/drivers/net/ethernet/renesas/ravb_main.c
@@ -0,0 +1,3117 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Renesas Ethernet AVB device driver
+ *
+ * Copyright (C) 2014-2019 Renesas Electronics Corporation
+ * Copyright (C) 2015 Renesas Solutions Corp.
+ * Copyright (C) 2015-2016 Cogent Embedded, Inc. <source@cogentembedded.com>
+ *
+ * Based on the SuperH Ethernet driver
+ */
+
+#include <linux/cache.h>
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/dma-mapping.h>
+#include <linux/err.h>
+#include <linux/etherdevice.h>
+#include <linux/ethtool.h>
+#include <linux/if_vlan.h>
+#include <linux/kernel.h>
+#include <linux/list.h>
+#include <linux/module.h>
+#include <linux/net_tstamp.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/of_irq.h>
+#include <linux/of_mdio.h>
+#include <linux/of_net.h>
+#include <linux/pm_runtime.h>
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+#include <linux/sys_soc.h>
+#include <linux/reset.h>
+#include <linux/math64.h>
+
+#include "ravb.h"
+
+#define RAVB_DEF_MSG_ENABLE \
+		(NETIF_MSG_LINK	  | \
+		 NETIF_MSG_TIMER  | \
+		 NETIF_MSG_RX_ERR | \
+		 NETIF_MSG_TX_ERR)
+
+static const char *ravb_rx_irqs[NUM_RX_QUEUE] = {
+	"ch0", /* RAVB_BE */
+	"ch1", /* RAVB_NC */
+};
+
+static const char *ravb_tx_irqs[NUM_TX_QUEUE] = {
+	"ch18", /* RAVB_BE */
+	"ch19", /* RAVB_NC */
+};
+
+void ravb_modify(struct net_device *ndev, enum ravb_reg reg, u32 clear,
+		 u32 set)
+{
+	ravb_write(ndev, (ravb_read(ndev, reg) & ~clear) | set, reg);
+}
+
+int ravb_wait(struct net_device *ndev, enum ravb_reg reg, u32 mask, u32 value)
+{
+	int i;
+
+	for (i = 0; i < 10000; i++) {
+		if ((ravb_read(ndev, reg) & mask) == value)
+			return 0;
+		udelay(10);
+	}
+	return -ETIMEDOUT;
+}
+
+static int ravb_set_opmode(struct net_device *ndev, u32 opmode)
+{
+	u32 csr_ops = 1U << (opmode & CCC_OPC);
+	u32 ccc_mask = CCC_OPC;
+	int error;
+
+	/* If gPTP active in config mode is supported it needs to be configured
+	 * along with CSEL and operating mode in the same access. This is a
+	 * hardware limitation.
+	 */
+	if (opmode & CCC_GAC)
+		ccc_mask |= CCC_GAC | CCC_CSEL;
+
+	/* Set operating mode */
+	ravb_modify(ndev, CCC, ccc_mask, opmode);
+	/* Check if the operating mode is changed to the requested one */
+	error = ravb_wait(ndev, CSR, CSR_OPS, csr_ops);
+	if (error) {
+		netdev_err(ndev, "failed to switch device to requested mode (%u)\n",
+			   opmode & CCC_OPC);
+	}
+
+	return error;
+}
+
+static void ravb_set_rate_gbeth(struct net_device *ndev)
+{
+	struct ravb_private *priv = netdev_priv(ndev);
+
+	switch (priv->speed) {
+	case 10:                /* 10BASE */
+		ravb_write(ndev, GBETH_GECMR_SPEED_10, GECMR);
+		break;
+	case 100:               /* 100BASE */
+		ravb_write(ndev, GBETH_GECMR_SPEED_100, GECMR);
+		break;
+	case 1000:              /* 1000BASE */
+		ravb_write(ndev, GBETH_GECMR_SPEED_1000, GECMR);
+		break;
+	}
+}
+
+static void ravb_set_rate_rcar(struct net_device *ndev)
+{
+	struct ravb_private *priv = netdev_priv(ndev);
+
+	switch (priv->speed) {
+	case 100:		/* 100BASE */
+		ravb_write(ndev, GECMR_SPEED_100, GECMR);
+		break;
+	case 1000:		/* 1000BASE */
+		ravb_write(ndev, GECMR_SPEED_1000, GECMR);
+		break;
+	}
+}
+
+static void ravb_set_buffer_align(struct sk_buff *skb)
+{
+	u32 reserve = (unsigned long)skb->data & (RAVB_ALIGN - 1);
+
+	if (reserve)
+		skb_reserve(skb, RAVB_ALIGN - reserve);
+}
+
+/* Get MAC address from the MAC address registers
+ *
+ * Ethernet AVB device doesn't have ROM for MAC address.
+ * This function gets the MAC address that was used by a bootloader.
+ */
+static void ravb_read_mac_address(struct device_node *np,
+				  struct net_device *ndev)
+{
+	int ret;
+
+	ret = of_get_ethdev_address(np, ndev);
+	if (ret) {
+		u32 mahr = ravb_read(ndev, MAHR);
+		u32 malr = ravb_read(ndev, MALR);
+		u8 addr[ETH_ALEN];
+
+		addr[0] = (mahr >> 24) & 0xFF;
+		addr[1] = (mahr >> 16) & 0xFF;
+		addr[2] = (mahr >>  8) & 0xFF;
+		addr[3] = (mahr >>  0) & 0xFF;
+		addr[4] = (malr >>  8) & 0xFF;
+		addr[5] = (malr >>  0) & 0xFF;
+		eth_hw_addr_set(ndev, addr);
+	}
+}
+
+static void ravb_mdio_ctrl(struct mdiobb_ctrl *ctrl, u32 mask, int set)
+{
+	struct ravb_private *priv = container_of(ctrl, struct ravb_private,
+						 mdiobb);
+
+	ravb_modify(priv->ndev, PIR, mask, set ? mask : 0);
+}
+
+/* MDC pin control */
+static void ravb_set_mdc(struct mdiobb_ctrl *ctrl, int level)
+{
+	ravb_mdio_ctrl(ctrl, PIR_MDC, level);
+}
+
+/* Data I/O pin control */
+static void ravb_set_mdio_dir(struct mdiobb_ctrl *ctrl, int output)
+{
+	ravb_mdio_ctrl(ctrl, PIR_MMD, output);
+}
+
+/* Set data bit */
+static void ravb_set_mdio_data(struct mdiobb_ctrl *ctrl, int value)
+{
+	ravb_mdio_ctrl(ctrl, PIR_MDO, value);
+}
+
+/* Get data bit */
+static int ravb_get_mdio_data(struct mdiobb_ctrl *ctrl)
+{
+	struct ravb_private *priv = container_of(ctrl, struct ravb_private,
+						 mdiobb);
+
+	return (ravb_read(priv->ndev, PIR) & PIR_MDI) != 0;
+}
+
+/* MDIO bus control struct */
+static const struct mdiobb_ops bb_ops = {
+	.owner = THIS_MODULE,
+	.set_mdc = ravb_set_mdc,
+	.set_mdio_dir = ravb_set_mdio_dir,
+	.set_mdio_data = ravb_set_mdio_data,
+	.get_mdio_data = ravb_get_mdio_data,
+};
+
+/* Free TX skb function for AVB-IP */
+static int ravb_tx_free(struct net_device *ndev, int q, bool free_txed_only)
+{
+	struct ravb_private *priv = netdev_priv(ndev);
+	struct net_device_stats *stats = &priv->stats[q];
+	unsigned int num_tx_desc = priv->num_tx_desc;
+	struct ravb_tx_desc *desc;
+	unsigned int entry;
+	int free_num = 0;
+	u32 size;
+
+	for (; priv->cur_tx[q] - priv->dirty_tx[q] > 0; priv->dirty_tx[q]++) {
+		bool txed;
+
+		entry = priv->dirty_tx[q] % (priv->num_tx_ring[q] *
+					     num_tx_desc);
+		desc = &priv->tx_ring[q][entry];
+		txed = desc->die_dt == DT_FEMPTY;
+		if (free_txed_only && !txed)
+			break;
+		/* Descriptor type must be checked before all other reads */
+		dma_rmb();
+		size = le16_to_cpu(desc->ds_tagl) & TX_DS;
+		/* Free the original skb. */
+		if (priv->tx_skb[q][entry / num_tx_desc]) {
+			dma_unmap_single(ndev->dev.parent, le32_to_cpu(desc->dptr),
+					 size, DMA_TO_DEVICE);
+			/* Last packet descriptor? */
+			if (entry % num_tx_desc == num_tx_desc - 1) {
+				entry /= num_tx_desc;
+				dev_kfree_skb_any(priv->tx_skb[q][entry]);
+				priv->tx_skb[q][entry] = NULL;
+				if (txed)
+					stats->tx_packets++;
+			}
+			free_num++;
+		}
+		if (txed)
+			stats->tx_bytes += size;
+		desc->die_dt = DT_EEMPTY;
+	}
+	return free_num;
+}
+
+static void ravb_rx_ring_free_gbeth(struct net_device *ndev, int q)
+{
+	struct ravb_private *priv = netdev_priv(ndev);
+	unsigned int ring_size;
+	unsigned int i;
+
+	if (!priv->gbeth_rx_ring)
+		return;
+
+	for (i = 0; i < priv->num_rx_ring[q]; i++) {
+		struct ravb_rx_desc *desc = &priv->gbeth_rx_ring[i];
+
+		if (!dma_mapping_error(ndev->dev.parent,
+				       le32_to_cpu(desc->dptr)))
+			dma_unmap_single(ndev->dev.parent,
+					 le32_to_cpu(desc->dptr),
+					 GBETH_RX_BUFF_MAX,
+					 DMA_FROM_DEVICE);
+	}
+	ring_size = sizeof(struct ravb_rx_desc) * (priv->num_rx_ring[q] + 1);
+	dma_free_coherent(ndev->dev.parent, ring_size, priv->gbeth_rx_ring,
+			  priv->rx_desc_dma[q]);
+	priv->gbeth_rx_ring = NULL;
+}
+
+static void ravb_rx_ring_free_rcar(struct net_device *ndev, int q)
+{
+	struct ravb_private *priv = netdev_priv(ndev);
+	unsigned int ring_size;
+	unsigned int i;
+
+	if (!priv->rx_ring[q])
+		return;
+
+	for (i = 0; i < priv->num_rx_ring[q]; i++) {
+		struct ravb_ex_rx_desc *desc = &priv->rx_ring[q][i];
+
+		if (!dma_mapping_error(ndev->dev.parent,
+				       le32_to_cpu(desc->dptr)))
+			dma_unmap_single(ndev->dev.parent,
+					 le32_to_cpu(desc->dptr),
+					 RX_BUF_SZ,
+					 DMA_FROM_DEVICE);
+	}
+	ring_size = sizeof(struct ravb_ex_rx_desc) *
+		    (priv->num_rx_ring[q] + 1);
+	dma_free_coherent(ndev->dev.parent, ring_size, priv->rx_ring[q],
+			  priv->rx_desc_dma[q]);
+	priv->rx_ring[q] = NULL;
+}
+
+/* Free skb's and DMA buffers for Ethernet AVB */
+static void ravb_ring_free(struct net_device *ndev, int q)
+{
+	struct ravb_private *priv = netdev_priv(ndev);
+	const struct ravb_hw_info *info = priv->info;
+	unsigned int num_tx_desc = priv->num_tx_desc;
+	unsigned int ring_size;
+	unsigned int i;
+
+	info->rx_ring_free(ndev, q);
+
+	if (priv->tx_ring[q]) {
+		ravb_tx_free(ndev, q, false);
+
+		ring_size = sizeof(struct ravb_tx_desc) *
+			    (priv->num_tx_ring[q] * num_tx_desc + 1);
+		dma_free_coherent(ndev->dev.parent, ring_size, priv->tx_ring[q],
+				  priv->tx_desc_dma[q]);
+		priv->tx_ring[q] = NULL;
+	}
+
+	/* Free RX skb ringbuffer */
+	if (priv->rx_skb[q]) {
+		for (i = 0; i < priv->num_rx_ring[q]; i++)
+			dev_kfree_skb(priv->rx_skb[q][i]);
+	}
+	kfree(priv->rx_skb[q]);
+	priv->rx_skb[q] = NULL;
+
+	/* Free aligned TX buffers */
+	kfree(priv->tx_align[q]);
+	priv->tx_align[q] = NULL;
+
+	/* Free TX skb ringbuffer.
+	 * SKBs are freed by ravb_tx_free() call above.
+	 */
+	kfree(priv->tx_skb[q]);
+	priv->tx_skb[q] = NULL;
+}
+
+static void ravb_rx_ring_format_gbeth(struct net_device *ndev, int q)
+{
+	struct ravb_private *priv = netdev_priv(ndev);
+	struct ravb_rx_desc *rx_desc;
+	unsigned int rx_ring_size;
+	dma_addr_t dma_addr;
+	unsigned int i;
+
+	rx_ring_size = sizeof(*rx_desc) * priv->num_rx_ring[q];
+	memset(priv->gbeth_rx_ring, 0, rx_ring_size);
+	/* Build RX ring buffer */
+	for (i = 0; i < priv->num_rx_ring[q]; i++) {
+		/* RX descriptor */
+		rx_desc = &priv->gbeth_rx_ring[i];
+		rx_desc->ds_cc = cpu_to_le16(GBETH_RX_DESC_DATA_SIZE);
+		dma_addr = dma_map_single(ndev->dev.parent, priv->rx_skb[q][i]->data,
+					  GBETH_RX_BUFF_MAX,
+					  DMA_FROM_DEVICE);
+		/* We just set the data size to 0 for a failed mapping which
+		 * should prevent DMA from happening...
+		 */
+		if (dma_mapping_error(ndev->dev.parent, dma_addr))
+			rx_desc->ds_cc = cpu_to_le16(0);
+		rx_desc->dptr = cpu_to_le32(dma_addr);
+		rx_desc->die_dt = DT_FEMPTY;
+	}
+	rx_desc = &priv->gbeth_rx_ring[i];
+	rx_desc->dptr = cpu_to_le32((u32)priv->rx_desc_dma[q]);
+	rx_desc->die_dt = DT_LINKFIX; /* type */
+}
+
+static void ravb_rx_ring_format_rcar(struct net_device *ndev, int q)
+{
+	struct ravb_private *priv = netdev_priv(ndev);
+	struct ravb_ex_rx_desc *rx_desc;
+	unsigned int rx_ring_size = sizeof(*rx_desc) * priv->num_rx_ring[q];
+	dma_addr_t dma_addr;
+	unsigned int i;
+
+	memset(priv->rx_ring[q], 0, rx_ring_size);
+	/* Build RX ring buffer */
+	for (i = 0; i < priv->num_rx_ring[q]; i++) {
+		/* RX descriptor */
+		rx_desc = &priv->rx_ring[q][i];
+		rx_desc->ds_cc = cpu_to_le16(RX_BUF_SZ);
+		dma_addr = dma_map_single(ndev->dev.parent, priv->rx_skb[q][i]->data,
+					  RX_BUF_SZ,
+					  DMA_FROM_DEVICE);
+		/* We just set the data size to 0 for a failed mapping which
+		 * should prevent DMA from happening...
+		 */
+		if (dma_mapping_error(ndev->dev.parent, dma_addr))
+			rx_desc->ds_cc = cpu_to_le16(0);
+		rx_desc->dptr = cpu_to_le32(dma_addr);
+		rx_desc->die_dt = DT_FEMPTY;
+	}
+	rx_desc = &priv->rx_ring[q][i];
+	rx_desc->dptr = cpu_to_le32((u32)priv->rx_desc_dma[q]);
+	rx_desc->die_dt = DT_LINKFIX; /* type */
+}
+
+/* Format skb and descriptor buffer for Ethernet AVB */
+static void ravb_ring_format(struct net_device *ndev, int q)
+{
+	struct ravb_private *priv = netdev_priv(ndev);
+	const struct ravb_hw_info *info = priv->info;
+	unsigned int num_tx_desc = priv->num_tx_desc;
+	struct ravb_tx_desc *tx_desc;
+	struct ravb_desc *desc;
+	unsigned int tx_ring_size = sizeof(*tx_desc) * priv->num_tx_ring[q] *
+				    num_tx_desc;
+	unsigned int i;
+
+	priv->cur_rx[q] = 0;
+	priv->cur_tx[q] = 0;
+	priv->dirty_rx[q] = 0;
+	priv->dirty_tx[q] = 0;
+
+	info->rx_ring_format(ndev, q);
+
+	memset(priv->tx_ring[q], 0, tx_ring_size);
+	/* Build TX ring buffer */
+	for (i = 0, tx_desc = priv->tx_ring[q]; i < priv->num_tx_ring[q];
+	     i++, tx_desc++) {
+		tx_desc->die_dt = DT_EEMPTY;
+		if (num_tx_desc > 1) {
+			tx_desc++;
+			tx_desc->die_dt = DT_EEMPTY;
+		}
+	}
+	tx_desc->dptr = cpu_to_le32((u32)priv->tx_desc_dma[q]);
+	tx_desc->die_dt = DT_LINKFIX; /* type */
+
+	/* RX descriptor base address for best effort */
+	desc = &priv->desc_bat[RX_QUEUE_OFFSET + q];
+	desc->die_dt = DT_LINKFIX; /* type */
+	desc->dptr = cpu_to_le32((u32)priv->rx_desc_dma[q]);
+
+	/* TX descriptor base address for best effort */
+	desc = &priv->desc_bat[q];
+	desc->die_dt = DT_LINKFIX; /* type */
+	desc->dptr = cpu_to_le32((u32)priv->tx_desc_dma[q]);
+}
+
+static void *ravb_alloc_rx_desc_gbeth(struct net_device *ndev, int q)
+{
+	struct ravb_private *priv = netdev_priv(ndev);
+	unsigned int ring_size;
+
+	ring_size = sizeof(struct ravb_rx_desc) * (priv->num_rx_ring[q] + 1);
+
+	priv->gbeth_rx_ring = dma_alloc_coherent(ndev->dev.parent, ring_size,
+						 &priv->rx_desc_dma[q],
+						 GFP_KERNEL);
+	return priv->gbeth_rx_ring;
+}
+
+static void *ravb_alloc_rx_desc_rcar(struct net_device *ndev, int q)
+{
+	struct ravb_private *priv = netdev_priv(ndev);
+	unsigned int ring_size;
+
+	ring_size = sizeof(struct ravb_ex_rx_desc) * (priv->num_rx_ring[q] + 1);
+
+	priv->rx_ring[q] = dma_alloc_coherent(ndev->dev.parent, ring_size,
+					      &priv->rx_desc_dma[q],
+					      GFP_KERNEL);
+	return priv->rx_ring[q];
+}
+
+/* Init skb and descriptor buffer for Ethernet AVB */
+static int ravb_ring_init(struct net_device *ndev, int q)
+{
+	struct ravb_private *priv = netdev_priv(ndev);
+	const struct ravb_hw_info *info = priv->info;
+	unsigned int num_tx_desc = priv->num_tx_desc;
+	unsigned int ring_size;
+	struct sk_buff *skb;
+	unsigned int i;
+
+	/* Allocate RX and TX skb rings */
+	priv->rx_skb[q] = kcalloc(priv->num_rx_ring[q],
+				  sizeof(*priv->rx_skb[q]), GFP_KERNEL);
+	priv->tx_skb[q] = kcalloc(priv->num_tx_ring[q],
+				  sizeof(*priv->tx_skb[q]), GFP_KERNEL);
+	if (!priv->rx_skb[q] || !priv->tx_skb[q])
+		goto error;
+
+	for (i = 0; i < priv->num_rx_ring[q]; i++) {
+		skb = __netdev_alloc_skb(ndev, info->max_rx_len, GFP_KERNEL);
+		if (!skb)
+			goto error;
+		ravb_set_buffer_align(skb);
+		priv->rx_skb[q][i] = skb;
+	}
+
+	if (num_tx_desc > 1) {
+		/* Allocate rings for the aligned buffers */
+		priv->tx_align[q] = kmalloc(DPTR_ALIGN * priv->num_tx_ring[q] +
+					    DPTR_ALIGN - 1, GFP_KERNEL);
+		if (!priv->tx_align[q])
+			goto error;
+	}
+
+	/* Allocate all RX descriptors. */
+	if (!info->alloc_rx_desc(ndev, q))
+		goto error;
+
+	priv->dirty_rx[q] = 0;
+
+	/* Allocate all TX descriptors. */
+	ring_size = sizeof(struct ravb_tx_desc) *
+		    (priv->num_tx_ring[q] * num_tx_desc + 1);
+	priv->tx_ring[q] = dma_alloc_coherent(ndev->dev.parent, ring_size,
+					      &priv->tx_desc_dma[q],
+					      GFP_KERNEL);
+	if (!priv->tx_ring[q])
+		goto error;
+
+	return 0;
+
+error:
+	ravb_ring_free(ndev, q);
+
+	return -ENOMEM;
+}
+
+static void ravb_emac_init_gbeth(struct net_device *ndev)
+{
+	struct ravb_private *priv = netdev_priv(ndev);
+
+	if (priv->phy_interface == PHY_INTERFACE_MODE_MII) {
+		ravb_write(ndev, (1000 << 16) | CXR35_SEL_XMII_MII, CXR35);
+		ravb_modify(ndev, CXR31, CXR31_SEL_LINK0 | CXR31_SEL_LINK1, 0);
+	} else {
+		ravb_write(ndev, (1000 << 16) | CXR35_SEL_XMII_RGMII, CXR35);
+		ravb_modify(ndev, CXR31, CXR31_SEL_LINK0 | CXR31_SEL_LINK1,
+			    CXR31_SEL_LINK0);
+	}
+
+	/* Receive frame limit set register */
+	ravb_write(ndev, GBETH_RX_BUFF_MAX + ETH_FCS_LEN, RFLR);
+
+	/* EMAC Mode: PAUSE prohibition; Duplex; TX; RX; CRC Pass Through */
+	ravb_write(ndev, ECMR_ZPF | ((priv->duplex > 0) ? ECMR_DM : 0) |
+			 ECMR_TE | ECMR_RE | ECMR_RCPT |
+			 ECMR_TXF | ECMR_RXF, ECMR);
+
+	ravb_set_rate_gbeth(ndev);
+
+	/* Set MAC address */
+	ravb_write(ndev,
+		   (ndev->dev_addr[0] << 24) | (ndev->dev_addr[1] << 16) |
+		   (ndev->dev_addr[2] << 8)  | (ndev->dev_addr[3]), MAHR);
+	ravb_write(ndev, (ndev->dev_addr[4] << 8)  | (ndev->dev_addr[5]), MALR);
+
+	/* E-MAC status register clear */
+	ravb_write(ndev, ECSR_ICD | ECSR_LCHNG | ECSR_PFRI, ECSR);
+	ravb_write(ndev, CSR0_TPE | CSR0_RPE, CSR0);
+
+	/* E-MAC interrupt enable register */
+	ravb_write(ndev, ECSIPR_ICDIP, ECSIPR);
+}
+
+static void ravb_emac_init_rcar(struct net_device *ndev)
+{
+	/* Receive frame limit set register */
+	ravb_write(ndev, ndev->mtu + ETH_HLEN + VLAN_HLEN + ETH_FCS_LEN, RFLR);
+
+	/* EMAC Mode: PAUSE prohibition; Duplex; RX Checksum; TX; RX */
+	ravb_write(ndev, ECMR_ZPF | ECMR_DM |
+		   (ndev->features & NETIF_F_RXCSUM ? ECMR_RCSC : 0) |
+		   ECMR_TE | ECMR_RE, ECMR);
+
+	ravb_set_rate_rcar(ndev);
+
+	/* Set MAC address */
+	ravb_write(ndev,
+		   (ndev->dev_addr[0] << 24) | (ndev->dev_addr[1] << 16) |
+		   (ndev->dev_addr[2] << 8)  | (ndev->dev_addr[3]), MAHR);
+	ravb_write(ndev,
+		   (ndev->dev_addr[4] << 8)  | (ndev->dev_addr[5]), MALR);
+
+	/* E-MAC status register clear */
+	ravb_write(ndev, ECSR_ICD | ECSR_MPD, ECSR);
+
+	/* E-MAC interrupt enable register */
+	ravb_write(ndev, ECSIPR_ICDIP | ECSIPR_MPDIP | ECSIPR_LCHNGIP, ECSIPR);
+}
+
+/* E-MAC init function */
+static void ravb_emac_init(struct net_device *ndev)
+{
+	struct ravb_private *priv = netdev_priv(ndev);
+	const struct ravb_hw_info *info = priv->info;
+
+	info->emac_init(ndev);
+}
+
+static int ravb_dmac_init_gbeth(struct net_device *ndev)
+{
+	int error;
+
+	error = ravb_ring_init(ndev, RAVB_BE);
+	if (error)
+		return error;
+
+	/* Descriptor format */
+	ravb_ring_format(ndev, RAVB_BE);
+
+	/* Set DMAC RX */
+	ravb_write(ndev, 0x60000000, RCR);
+
+	/* Set Max Frame Length (RTC) */
+	ravb_write(ndev, 0x7ffc0000 | GBETH_RX_BUFF_MAX, RTC);
+
+	/* Set FIFO size */
+	ravb_write(ndev, 0x00222200, TGC);
+
+	ravb_write(ndev, 0, TCCR);
+
+	/* Frame receive */
+	ravb_write(ndev, RIC0_FRE0, RIC0);
+	/* Disable FIFO full warning */
+	ravb_write(ndev, 0x0, RIC1);
+	/* Receive FIFO full error, descriptor empty */
+	ravb_write(ndev, RIC2_QFE0 | RIC2_RFFE, RIC2);
+
+	ravb_write(ndev, TIC_FTE0, TIC);
+
+	return 0;
+}
+
+static int ravb_dmac_init_rcar(struct net_device *ndev)
+{
+	struct ravb_private *priv = netdev_priv(ndev);
+	const struct ravb_hw_info *info = priv->info;
+	int error;
+
+	error = ravb_ring_init(ndev, RAVB_BE);
+	if (error)
+		return error;
+	error = ravb_ring_init(ndev, RAVB_NC);
+	if (error) {
+		ravb_ring_free(ndev, RAVB_BE);
+		return error;
+	}
+
+	/* Descriptor format */
+	ravb_ring_format(ndev, RAVB_BE);
+	ravb_ring_format(ndev, RAVB_NC);
+
+	/* Set AVB RX */
+	ravb_write(ndev,
+		   RCR_EFFS | RCR_ENCF | RCR_ETS0 | RCR_ESF | 0x18000000, RCR);
+
+	/* Set FIFO size */
+	ravb_write(ndev, TGC_TQP_AVBMODE1 | 0x00112200, TGC);
+
+	/* Timestamp enable */
+	ravb_write(ndev, TCCR_TFEN, TCCR);
+
+	/* Interrupt init: */
+	if (info->multi_irqs) {
+		/* Clear DIL.DPLx */
+		ravb_write(ndev, 0, DIL);
+		/* Set queue specific interrupt */
+		ravb_write(ndev, CIE_CRIE | CIE_CTIE | CIE_CL0M, CIE);
+	}
+	/* Frame receive */
+	ravb_write(ndev, RIC0_FRE0 | RIC0_FRE1, RIC0);
+	/* Disable FIFO full warning */
+	ravb_write(ndev, 0, RIC1);
+	/* Receive FIFO full error, descriptor empty */
+	ravb_write(ndev, RIC2_QFE0 | RIC2_QFE1 | RIC2_RFFE, RIC2);
+	/* Frame transmitted, timestamp FIFO updated */
+	ravb_write(ndev, TIC_FTE0 | TIC_FTE1 | TIC_TFUE, TIC);
+
+	return 0;
+}
+
+/* Device init function for Ethernet AVB */
+static int ravb_dmac_init(struct net_device *ndev)
+{
+	struct ravb_private *priv = netdev_priv(ndev);
+	const struct ravb_hw_info *info = priv->info;
+	int error;
+
+	/* Set CONFIG mode */
+	error = ravb_set_opmode(ndev, CCC_OPC_CONFIG);
+	if (error)
+		return error;
+
+	error = info->dmac_init(ndev);
+	if (error)
+		return error;
+
+	/* Setting the control will start the AVB-DMAC process. */
+	return ravb_set_opmode(ndev, CCC_OPC_OPERATION);
+}
+
+static void ravb_get_tx_tstamp(struct net_device *ndev)
+{
+	struct ravb_private *priv = netdev_priv(ndev);
+	struct ravb_tstamp_skb *ts_skb, *ts_skb2;
+	struct skb_shared_hwtstamps shhwtstamps;
+	struct sk_buff *skb;
+	struct timespec64 ts;
+	u16 tag, tfa_tag;
+	int count;
+	u32 tfa2;
+
+	count = (ravb_read(ndev, TSR) & TSR_TFFL) >> 8;
+	while (count--) {
+		tfa2 = ravb_read(ndev, TFA2);
+		tfa_tag = (tfa2 & TFA2_TST) >> 16;
+		ts.tv_nsec = (u64)ravb_read(ndev, TFA0);
+		ts.tv_sec = ((u64)(tfa2 & TFA2_TSV) << 32) |
+			    ravb_read(ndev, TFA1);
+		memset(&shhwtstamps, 0, sizeof(shhwtstamps));
+		shhwtstamps.hwtstamp = timespec64_to_ktime(ts);
+		list_for_each_entry_safe(ts_skb, ts_skb2, &priv->ts_skb_list,
+					 list) {
+			skb = ts_skb->skb;
+			tag = ts_skb->tag;
+			list_del(&ts_skb->list);
+			kfree(ts_skb);
+			if (tag == tfa_tag) {
+				skb_tstamp_tx(skb, &shhwtstamps);
+				dev_consume_skb_any(skb);
+				break;
+			} else {
+				dev_kfree_skb_any(skb);
+			}
+		}
+		ravb_modify(ndev, TCCR, TCCR_TFR, TCCR_TFR);
+	}
+}
+
+static void ravb_rx_csum(struct sk_buff *skb)
+{
+	u8 *hw_csum;
+
+	/* The hardware checksum is contained in sizeof(__sum16) (2) bytes
+	 * appended to packet data
+	 */
+	if (unlikely(skb->len < sizeof(__sum16)))
+		return;
+	hw_csum = skb_tail_pointer(skb) - sizeof(__sum16);
+	skb->csum = csum_unfold((__force __sum16)get_unaligned_le16(hw_csum));
+	skb->ip_summed = CHECKSUM_COMPLETE;
+	skb_trim(skb, skb->len - sizeof(__sum16));
+}
+
+static struct sk_buff *ravb_get_skb_gbeth(struct net_device *ndev, int entry,
+					  struct ravb_rx_desc *desc)
+{
+	struct ravb_private *priv = netdev_priv(ndev);
+	struct sk_buff *skb;
+
+	skb = priv->rx_skb[RAVB_BE][entry];
+	priv->rx_skb[RAVB_BE][entry] = NULL;
+	dma_unmap_single(ndev->dev.parent, le32_to_cpu(desc->dptr),
+			 ALIGN(GBETH_RX_BUFF_MAX, 16), DMA_FROM_DEVICE);
+
+	return skb;
+}
+
+/* Packet receive function for Gigabit Ethernet */
+static bool ravb_rx_gbeth(struct net_device *ndev, int *quota, int q)
+{
+	struct ravb_private *priv = netdev_priv(ndev);
+	const struct ravb_hw_info *info = priv->info;
+	struct net_device_stats *stats;
+	struct ravb_rx_desc *desc;
+	struct sk_buff *skb;
+	dma_addr_t dma_addr;
+	u8  desc_status;
+	int boguscnt;
+	u16 pkt_len;
+	u8  die_dt;
+	int entry;
+	int limit;
+
+	entry = priv->cur_rx[q] % priv->num_rx_ring[q];
+	boguscnt = priv->dirty_rx[q] + priv->num_rx_ring[q] - priv->cur_rx[q];
+	stats = &priv->stats[q];
+
+	boguscnt = min(boguscnt, *quota);
+	limit = boguscnt;
+	desc = &priv->gbeth_rx_ring[entry];
+	while (desc->die_dt != DT_FEMPTY) {
+		/* Descriptor type must be checked before all other reads */
+		dma_rmb();
+		desc_status = desc->msc;
+		pkt_len = le16_to_cpu(desc->ds_cc) & RX_DS;
+
+		if (--boguscnt < 0)
+			break;
+
+		/* We use 0-byte descriptors to mark the DMA mapping errors */
+		if (!pkt_len)
+			continue;
+
+		if (desc_status & MSC_MC)
+			stats->multicast++;
+
+		if (desc_status & (MSC_CRC | MSC_RFE | MSC_RTSF | MSC_RTLF | MSC_CEEF)) {
+			stats->rx_errors++;
+			if (desc_status & MSC_CRC)
+				stats->rx_crc_errors++;
+			if (desc_status & MSC_RFE)
+				stats->rx_frame_errors++;
+			if (desc_status & (MSC_RTLF | MSC_RTSF))
+				stats->rx_length_errors++;
+			if (desc_status & MSC_CEEF)
+				stats->rx_missed_errors++;
+		} else {
+			die_dt = desc->die_dt & 0xF0;
+			switch (die_dt) {
+			case DT_FSINGLE:
+				skb = ravb_get_skb_gbeth(ndev, entry, desc);
+				skb_put(skb, pkt_len);
+				skb->protocol = eth_type_trans(skb, ndev);
+				napi_gro_receive(&priv->napi[q], skb);
+				stats->rx_packets++;
+				stats->rx_bytes += pkt_len;
+				break;
+			case DT_FSTART:
+				priv->rx_1st_skb = ravb_get_skb_gbeth(ndev, entry, desc);
+				skb_put(priv->rx_1st_skb, pkt_len);
+				break;
+			case DT_FMID:
+				skb = ravb_get_skb_gbeth(ndev, entry, desc);
+				skb_copy_to_linear_data_offset(priv->rx_1st_skb,
+							       priv->rx_1st_skb->len,
+							       skb->data,
+							       pkt_len);
+				skb_put(priv->rx_1st_skb, pkt_len);
+				dev_kfree_skb(skb);
+				break;
+			case DT_FEND:
+				skb = ravb_get_skb_gbeth(ndev, entry, desc);
+				skb_copy_to_linear_data_offset(priv->rx_1st_skb,
+							       priv->rx_1st_skb->len,
+							       skb->data,
+							       pkt_len);
+				skb_put(priv->rx_1st_skb, pkt_len);
+				dev_kfree_skb(skb);
+				priv->rx_1st_skb->protocol =
+					eth_type_trans(priv->rx_1st_skb, ndev);
+				napi_gro_receive(&priv->napi[q],
+						 priv->rx_1st_skb);
+				stats->rx_packets++;
+				stats->rx_bytes += pkt_len;
+				break;
+			}
+		}
+
+		entry = (++priv->cur_rx[q]) % priv->num_rx_ring[q];
+		desc = &priv->gbeth_rx_ring[entry];
+	}
+
+	/* Refill the RX ring buffers. */
+	for (; priv->cur_rx[q] - priv->dirty_rx[q] > 0; priv->dirty_rx[q]++) {
+		entry = priv->dirty_rx[q] % priv->num_rx_ring[q];
+		desc = &priv->gbeth_rx_ring[entry];
+		desc->ds_cc = cpu_to_le16(GBETH_RX_DESC_DATA_SIZE);
+
+		if (!priv->rx_skb[q][entry]) {
+			skb = netdev_alloc_skb(ndev, info->max_rx_len);
+			if (!skb)
+				break;
+			ravb_set_buffer_align(skb);
+			dma_addr = dma_map_single(ndev->dev.parent,
+						  skb->data,
+						  GBETH_RX_BUFF_MAX,
+						  DMA_FROM_DEVICE);
+			skb_checksum_none_assert(skb);
+			/* We just set the data size to 0 for a failed mapping
+			 * which should prevent DMA  from happening...
+			 */
+			if (dma_mapping_error(ndev->dev.parent, dma_addr))
+				desc->ds_cc = cpu_to_le16(0);
+			desc->dptr = cpu_to_le32(dma_addr);
+			priv->rx_skb[q][entry] = skb;
+		}
+		/* Descriptor type must be set after all the above writes */
+		dma_wmb();
+		desc->die_dt = DT_FEMPTY;
+	}
+
+	*quota -= limit - (++boguscnt);
+
+	return boguscnt <= 0;
+}
+
+/* Packet receive function for Ethernet AVB */
+static bool ravb_rx_rcar(struct net_device *ndev, int *quota, int q)
+{
+	struct ravb_private *priv = netdev_priv(ndev);
+	const struct ravb_hw_info *info = priv->info;
+	int entry = priv->cur_rx[q] % priv->num_rx_ring[q];
+	int boguscnt = (priv->dirty_rx[q] + priv->num_rx_ring[q]) -
+			priv->cur_rx[q];
+	struct net_device_stats *stats = &priv->stats[q];
+	struct ravb_ex_rx_desc *desc;
+	struct sk_buff *skb;
+	dma_addr_t dma_addr;
+	struct timespec64 ts;
+	u8  desc_status;
+	u16 pkt_len;
+	int limit;
+
+	boguscnt = min(boguscnt, *quota);
+	limit = boguscnt;
+	desc = &priv->rx_ring[q][entry];
+	while (desc->die_dt != DT_FEMPTY) {
+		/* Descriptor type must be checked before all other reads */
+		dma_rmb();
+		desc_status = desc->msc;
+		pkt_len = le16_to_cpu(desc->ds_cc) & RX_DS;
+
+		if (--boguscnt < 0)
+			break;
+
+		/* We use 0-byte descriptors to mark the DMA mapping errors */
+		if (!pkt_len)
+			continue;
+
+		if (desc_status & MSC_MC)
+			stats->multicast++;
+
+		if (desc_status & (MSC_CRC | MSC_RFE | MSC_RTSF | MSC_RTLF |
+				   MSC_CEEF)) {
+			stats->rx_errors++;
+			if (desc_status & MSC_CRC)
+				stats->rx_crc_errors++;
+			if (desc_status & MSC_RFE)
+				stats->rx_frame_errors++;
+			if (desc_status & (MSC_RTLF | MSC_RTSF))
+				stats->rx_length_errors++;
+			if (desc_status & MSC_CEEF)
+				stats->rx_missed_errors++;
+		} else {
+			u32 get_ts = priv->tstamp_rx_ctrl & RAVB_RXTSTAMP_TYPE;
+
+			skb = priv->rx_skb[q][entry];
+			priv->rx_skb[q][entry] = NULL;
+			dma_unmap_single(ndev->dev.parent, le32_to_cpu(desc->dptr),
+					 RX_BUF_SZ,
+					 DMA_FROM_DEVICE);
+			get_ts &= (q == RAVB_NC) ?
+					RAVB_RXTSTAMP_TYPE_V2_L2_EVENT :
+					~RAVB_RXTSTAMP_TYPE_V2_L2_EVENT;
+			if (get_ts) {
+				struct skb_shared_hwtstamps *shhwtstamps;
+
+				shhwtstamps = skb_hwtstamps(skb);
+				memset(shhwtstamps, 0, sizeof(*shhwtstamps));
+				ts.tv_sec = ((u64) le16_to_cpu(desc->ts_sh) <<
+					     32) | le32_to_cpu(desc->ts_sl);
+				ts.tv_nsec = le32_to_cpu(desc->ts_n);
+				shhwtstamps->hwtstamp = timespec64_to_ktime(ts);
+			}
+
+			skb_put(skb, pkt_len);
+			skb->protocol = eth_type_trans(skb, ndev);
+			if (ndev->features & NETIF_F_RXCSUM)
+				ravb_rx_csum(skb);
+			napi_gro_receive(&priv->napi[q], skb);
+			stats->rx_packets++;
+			stats->rx_bytes += pkt_len;
+		}
+
+		entry = (++priv->cur_rx[q]) % priv->num_rx_ring[q];
+		desc = &priv->rx_ring[q][entry];
+	}
+
+	/* Refill the RX ring buffers. */
+	for (; priv->cur_rx[q] - priv->dirty_rx[q] > 0; priv->dirty_rx[q]++) {
+		entry = priv->dirty_rx[q] % priv->num_rx_ring[q];
+		desc = &priv->rx_ring[q][entry];
+		desc->ds_cc = cpu_to_le16(RX_BUF_SZ);
+
+		if (!priv->rx_skb[q][entry]) {
+			skb = netdev_alloc_skb(ndev, info->max_rx_len);
+			if (!skb)
+				break;	/* Better luck next round. */
+			ravb_set_buffer_align(skb);
+			dma_addr = dma_map_single(ndev->dev.parent, skb->data,
+						  le16_to_cpu(desc->ds_cc),
+						  DMA_FROM_DEVICE);
+			skb_checksum_none_assert(skb);
+			/* We just set the data size to 0 for a failed mapping
+			 * which should prevent DMA  from happening...
+			 */
+			if (dma_mapping_error(ndev->dev.parent, dma_addr))
+				desc->ds_cc = cpu_to_le16(0);
+			desc->dptr = cpu_to_le32(dma_addr);
+			priv->rx_skb[q][entry] = skb;
+		}
+		/* Descriptor type must be set after all the above writes */
+		dma_wmb();
+		desc->die_dt = DT_FEMPTY;
+	}
+
+	*quota -= limit - (++boguscnt);
+
+	return boguscnt <= 0;
+}
+
+/* Packet receive function for Ethernet AVB */
+static bool ravb_rx(struct net_device *ndev, int *quota, int q)
+{
+	struct ravb_private *priv = netdev_priv(ndev);
+	const struct ravb_hw_info *info = priv->info;
+
+	return info->receive(ndev, quota, q);
+}
+
+static void ravb_rcv_snd_disable(struct net_device *ndev)
+{
+	/* Disable TX and RX */
+	ravb_modify(ndev, ECMR, ECMR_RE | ECMR_TE, 0);
+}
+
+static void ravb_rcv_snd_enable(struct net_device *ndev)
+{
+	/* Enable TX and RX */
+	ravb_modify(ndev, ECMR, ECMR_RE | ECMR_TE, ECMR_RE | ECMR_TE);
+}
+
+/* function for waiting dma process finished */
+static int ravb_stop_dma(struct net_device *ndev)
+{
+	struct ravb_private *priv = netdev_priv(ndev);
+	const struct ravb_hw_info *info = priv->info;
+	int error;
+
+	/* Wait for stopping the hardware TX process */
+	error = ravb_wait(ndev, TCCR, info->tccr_mask, 0);
+
+	if (error)
+		return error;
+
+	error = ravb_wait(ndev, CSR, CSR_TPO0 | CSR_TPO1 | CSR_TPO2 | CSR_TPO3,
+			  0);
+	if (error)
+		return error;
+
+	/* Stop the E-MAC's RX/TX processes. */
+	ravb_rcv_snd_disable(ndev);
+
+	/* Wait for stopping the RX DMA process */
+	error = ravb_wait(ndev, CSR, CSR_RPO, 0);
+	if (error)
+		return error;
+
+	/* Stop AVB-DMAC process */
+	return ravb_set_opmode(ndev, CCC_OPC_CONFIG);
+}
+
+/* E-MAC interrupt handler */
+static void ravb_emac_interrupt_unlocked(struct net_device *ndev)
+{
+	struct ravb_private *priv = netdev_priv(ndev);
+	u32 ecsr, psr;
+
+	ecsr = ravb_read(ndev, ECSR);
+	ravb_write(ndev, ecsr, ECSR);	/* clear interrupt */
+
+	if (ecsr & ECSR_MPD)
+		pm_wakeup_event(&priv->pdev->dev, 0);
+	if (ecsr & ECSR_ICD)
+		ndev->stats.tx_carrier_errors++;
+	if (ecsr & ECSR_LCHNG) {
+		/* Link changed */
+		if (priv->no_avb_link)
+			return;
+		psr = ravb_read(ndev, PSR);
+		if (priv->avb_link_active_low)
+			psr ^= PSR_LMON;
+		if (!(psr & PSR_LMON)) {
+			/* DIsable RX and TX */
+			ravb_rcv_snd_disable(ndev);
+		} else {
+			/* Enable RX and TX */
+			ravb_rcv_snd_enable(ndev);
+		}
+	}
+}
+
+static irqreturn_t ravb_emac_interrupt(int irq, void *dev_id)
+{
+	struct net_device *ndev = dev_id;
+	struct ravb_private *priv = netdev_priv(ndev);
+
+	spin_lock(&priv->lock);
+	ravb_emac_interrupt_unlocked(ndev);
+	spin_unlock(&priv->lock);
+	return IRQ_HANDLED;
+}
+
+/* Error interrupt handler */
+static void ravb_error_interrupt(struct net_device *ndev)
+{
+	struct ravb_private *priv = netdev_priv(ndev);
+	u32 eis, ris2;
+
+	eis = ravb_read(ndev, EIS);
+	ravb_write(ndev, ~(EIS_QFS | EIS_RESERVED), EIS);
+	if (eis & EIS_QFS) {
+		ris2 = ravb_read(ndev, RIS2);
+		ravb_write(ndev, ~(RIS2_QFF0 | RIS2_QFF1 | RIS2_RFFF | RIS2_RESERVED),
+			   RIS2);
+
+		/* Receive Descriptor Empty int */
+		if (ris2 & RIS2_QFF0)
+			priv->stats[RAVB_BE].rx_over_errors++;
+
+		/* Receive Descriptor Empty int */
+		if (ris2 & RIS2_QFF1)
+			priv->stats[RAVB_NC].rx_over_errors++;
+
+		/* Receive FIFO Overflow int */
+		if (ris2 & RIS2_RFFF)
+			priv->rx_fifo_errors++;
+	}
+}
+
+static bool ravb_queue_interrupt(struct net_device *ndev, int q)
+{
+	struct ravb_private *priv = netdev_priv(ndev);
+	const struct ravb_hw_info *info = priv->info;
+	u32 ris0 = ravb_read(ndev, RIS0);
+	u32 ric0 = ravb_read(ndev, RIC0);
+	u32 tis  = ravb_read(ndev, TIS);
+	u32 tic  = ravb_read(ndev, TIC);
+
+	if (((ris0 & ric0) & BIT(q)) || ((tis  & tic)  & BIT(q))) {
+		if (napi_schedule_prep(&priv->napi[q])) {
+			/* Mask RX and TX interrupts */
+			if (!info->irq_en_dis) {
+				ravb_write(ndev, ric0 & ~BIT(q), RIC0);
+				ravb_write(ndev, tic & ~BIT(q), TIC);
+			} else {
+				ravb_write(ndev, BIT(q), RID0);
+				ravb_write(ndev, BIT(q), TID);
+			}
+			__napi_schedule(&priv->napi[q]);
+		} else {
+			netdev_warn(ndev,
+				    "ignoring interrupt, rx status 0x%08x, rx mask 0x%08x,\n",
+				    ris0, ric0);
+			netdev_warn(ndev,
+				    "                    tx status 0x%08x, tx mask 0x%08x.\n",
+				    tis, tic);
+		}
+		return true;
+	}
+	return false;
+}
+
+static bool ravb_timestamp_interrupt(struct net_device *ndev)
+{
+	u32 tis = ravb_read(ndev, TIS);
+
+	if (tis & TIS_TFUF) {
+		ravb_write(ndev, ~(TIS_TFUF | TIS_RESERVED), TIS);
+		ravb_get_tx_tstamp(ndev);
+		return true;
+	}
+	return false;
+}
+
+static irqreturn_t ravb_interrupt(int irq, void *dev_id)
+{
+	struct net_device *ndev = dev_id;
+	struct ravb_private *priv = netdev_priv(ndev);
+	const struct ravb_hw_info *info = priv->info;
+	irqreturn_t result = IRQ_NONE;
+	u32 iss;
+
+	spin_lock(&priv->lock);
+	/* Get interrupt status */
+	iss = ravb_read(ndev, ISS);
+
+	/* Received and transmitted interrupts */
+	if (iss & (ISS_FRS | ISS_FTS | ISS_TFUS)) {
+		int q;
+
+		/* Timestamp updated */
+		if (ravb_timestamp_interrupt(ndev))
+			result = IRQ_HANDLED;
+
+		/* Network control and best effort queue RX/TX */
+		if (info->nc_queues) {
+			for (q = RAVB_NC; q >= RAVB_BE; q--) {
+				if (ravb_queue_interrupt(ndev, q))
+					result = IRQ_HANDLED;
+			}
+		} else {
+			if (ravb_queue_interrupt(ndev, RAVB_BE))
+				result = IRQ_HANDLED;
+		}
+	}
+
+	/* E-MAC status summary */
+	if (iss & ISS_MS) {
+		ravb_emac_interrupt_unlocked(ndev);
+		result = IRQ_HANDLED;
+	}
+
+	/* Error status summary */
+	if (iss & ISS_ES) {
+		ravb_error_interrupt(ndev);
+		result = IRQ_HANDLED;
+	}
+
+	/* gPTP interrupt status summary */
+	if (iss & ISS_CGIS) {
+		ravb_ptp_interrupt(ndev);
+		result = IRQ_HANDLED;
+	}
+
+	spin_unlock(&priv->lock);
+	return result;
+}
+
+/* Timestamp/Error/gPTP interrupt handler */
+static irqreturn_t ravb_multi_interrupt(int irq, void *dev_id)
+{
+	struct net_device *ndev = dev_id;
+	struct ravb_private *priv = netdev_priv(ndev);
+	irqreturn_t result = IRQ_NONE;
+	u32 iss;
+
+	spin_lock(&priv->lock);
+	/* Get interrupt status */
+	iss = ravb_read(ndev, ISS);
+
+	/* Timestamp updated */
+	if ((iss & ISS_TFUS) && ravb_timestamp_interrupt(ndev))
+		result = IRQ_HANDLED;
+
+	/* Error status summary */
+	if (iss & ISS_ES) {
+		ravb_error_interrupt(ndev);
+		result = IRQ_HANDLED;
+	}
+
+	/* gPTP interrupt status summary */
+	if (iss & ISS_CGIS) {
+		ravb_ptp_interrupt(ndev);
+		result = IRQ_HANDLED;
+	}
+
+	spin_unlock(&priv->lock);
+	return result;
+}
+
+static irqreturn_t ravb_dma_interrupt(int irq, void *dev_id, int q)
+{
+	struct net_device *ndev = dev_id;
+	struct ravb_private *priv = netdev_priv(ndev);
+	irqreturn_t result = IRQ_NONE;
+
+	spin_lock(&priv->lock);
+
+	/* Network control/Best effort queue RX/TX */
+	if (ravb_queue_interrupt(ndev, q))
+		result = IRQ_HANDLED;
+
+	spin_unlock(&priv->lock);
+	return result;
+}
+
+static irqreturn_t ravb_be_interrupt(int irq, void *dev_id)
+{
+	return ravb_dma_interrupt(irq, dev_id, RAVB_BE);
+}
+
+static irqreturn_t ravb_nc_interrupt(int irq, void *dev_id)
+{
+	return ravb_dma_interrupt(irq, dev_id, RAVB_NC);
+}
+
+static int ravb_poll(struct napi_struct *napi, int budget)
+{
+	struct net_device *ndev = napi->dev;
+	struct ravb_private *priv = netdev_priv(ndev);
+	const struct ravb_hw_info *info = priv->info;
+	bool gptp = info->gptp || info->ccc_gac;
+	struct ravb_rx_desc *desc;
+	unsigned long flags;
+	int q = napi - priv->napi;
+	int mask = BIT(q);
+	int quota = budget;
+	unsigned int entry;
+
+	if (!gptp) {
+		entry = priv->cur_rx[q] % priv->num_rx_ring[q];
+		desc = &priv->gbeth_rx_ring[entry];
+	}
+	/* Processing RX Descriptor Ring */
+	/* Clear RX interrupt */
+	ravb_write(ndev, ~(mask | RIS0_RESERVED), RIS0);
+	if (gptp || desc->die_dt != DT_FEMPTY) {
+		if (ravb_rx(ndev, &quota, q))
+			goto out;
+	}
+
+	/* Processing TX Descriptor Ring */
+	spin_lock_irqsave(&priv->lock, flags);
+	/* Clear TX interrupt */
+	ravb_write(ndev, ~(mask | TIS_RESERVED), TIS);
+	ravb_tx_free(ndev, q, true);
+	netif_wake_subqueue(ndev, q);
+	spin_unlock_irqrestore(&priv->lock, flags);
+
+	napi_complete(napi);
+
+	/* Re-enable RX/TX interrupts */
+	spin_lock_irqsave(&priv->lock, flags);
+	if (!info->irq_en_dis) {
+		ravb_modify(ndev, RIC0, mask, mask);
+		ravb_modify(ndev, TIC,  mask, mask);
+	} else {
+		ravb_write(ndev, mask, RIE0);
+		ravb_write(ndev, mask, TIE);
+	}
+	spin_unlock_irqrestore(&priv->lock, flags);
+
+	/* Receive error message handling */
+	priv->rx_over_errors =  priv->stats[RAVB_BE].rx_over_errors;
+	if (info->nc_queues)
+		priv->rx_over_errors += priv->stats[RAVB_NC].rx_over_errors;
+	if (priv->rx_over_errors != ndev->stats.rx_over_errors)
+		ndev->stats.rx_over_errors = priv->rx_over_errors;
+	if (priv->rx_fifo_errors != ndev->stats.rx_fifo_errors)
+		ndev->stats.rx_fifo_errors = priv->rx_fifo_errors;
+out:
+	return budget - quota;
+}
+
+static void ravb_set_duplex_gbeth(struct net_device *ndev)
+{
+	struct ravb_private *priv = netdev_priv(ndev);
+
+	ravb_modify(ndev, ECMR, ECMR_DM, priv->duplex > 0 ? ECMR_DM : 0);
+}
+
+/* PHY state control function */
+static void ravb_adjust_link(struct net_device *ndev)
+{
+	struct ravb_private *priv = netdev_priv(ndev);
+	const struct ravb_hw_info *info = priv->info;
+	struct phy_device *phydev = ndev->phydev;
+	bool new_state = false;
+	unsigned long flags;
+
+	spin_lock_irqsave(&priv->lock, flags);
+
+	/* Disable TX and RX right over here, if E-MAC change is ignored */
+	if (priv->no_avb_link)
+		ravb_rcv_snd_disable(ndev);
+
+	if (phydev->link) {
+		if (info->half_duplex && phydev->duplex != priv->duplex) {
+			new_state = true;
+			priv->duplex = phydev->duplex;
+			ravb_set_duplex_gbeth(ndev);
+		}
+
+		if (phydev->speed != priv->speed) {
+			new_state = true;
+			priv->speed = phydev->speed;
+			info->set_rate(ndev);
+		}
+		if (!priv->link) {
+			ravb_modify(ndev, ECMR, ECMR_TXF, 0);
+			new_state = true;
+			priv->link = phydev->link;
+		}
+	} else if (priv->link) {
+		new_state = true;
+		priv->link = 0;
+		priv->speed = 0;
+		if (info->half_duplex)
+			priv->duplex = -1;
+	}
+
+	/* Enable TX and RX right over here, if E-MAC change is ignored */
+	if (priv->no_avb_link && phydev->link)
+		ravb_rcv_snd_enable(ndev);
+
+	spin_unlock_irqrestore(&priv->lock, flags);
+
+	if (new_state && netif_msg_link(priv))
+		phy_print_status(phydev);
+}
+
+static const struct soc_device_attribute r8a7795es10[] = {
+	{ .soc_id = "r8a7795", .revision = "ES1.0", },
+	{ /* sentinel */ }
+};
+
+/* PHY init function */
+static int ravb_phy_init(struct net_device *ndev)
+{
+	struct device_node *np = ndev->dev.parent->of_node;
+	struct ravb_private *priv = netdev_priv(ndev);
+	const struct ravb_hw_info *info = priv->info;
+	struct phy_device *phydev;
+	struct device_node *pn;
+	phy_interface_t iface;
+	int err;
+
+	priv->link = 0;
+	priv->speed = 0;
+	priv->duplex = -1;
+
+	/* Try connecting to PHY */
+	pn = of_parse_phandle(np, "phy-handle", 0);
+	if (!pn) {
+		/* In the case of a fixed PHY, the DT node associated
+		 * to the PHY is the Ethernet MAC DT node.
+		 */
+		if (of_phy_is_fixed_link(np)) {
+			err = of_phy_register_fixed_link(np);
+			if (err)
+				return err;
+		}
+		pn = of_node_get(np);
+	}
+
+	iface = priv->rgmii_override ? PHY_INTERFACE_MODE_RGMII
+				     : priv->phy_interface;
+	phydev = of_phy_connect(ndev, pn, ravb_adjust_link, 0, iface);
+	of_node_put(pn);
+	if (!phydev) {
+		netdev_err(ndev, "failed to connect PHY\n");
+		err = -ENOENT;
+		goto err_deregister_fixed_link;
+	}
+
+	/* This driver only support 10/100Mbit speeds on R-Car H3 ES1.0
+	 * at this time.
+	 */
+	if (soc_device_match(r8a7795es10)) {
+		phy_set_max_speed(phydev, SPEED_100);
+
+		netdev_info(ndev, "limited PHY to 100Mbit/s\n");
+	}
+
+	if (!info->half_duplex) {
+		/* 10BASE, Pause and Asym Pause is not supported */
+		phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_10baseT_Half_BIT);
+		phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_10baseT_Full_BIT);
+		phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_Pause_BIT);
+		phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_Asym_Pause_BIT);
+
+		/* Half Duplex is not supported */
+		phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_1000baseT_Half_BIT);
+		phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_100baseT_Half_BIT);
+	}
+
+	phy_attached_info(phydev);
+
+	return 0;
+
+err_deregister_fixed_link:
+	if (of_phy_is_fixed_link(np))
+		of_phy_deregister_fixed_link(np);
+
+	return err;
+}
+
+/* PHY control start function */
+static int ravb_phy_start(struct net_device *ndev)
+{
+	int error;
+
+	error = ravb_phy_init(ndev);
+	if (error)
+		return error;
+
+	phy_start(ndev->phydev);
+
+	return 0;
+}
+
+static u32 ravb_get_msglevel(struct net_device *ndev)
+{
+	struct ravb_private *priv = netdev_priv(ndev);
+
+	return priv->msg_enable;
+}
+
+static void ravb_set_msglevel(struct net_device *ndev, u32 value)
+{
+	struct ravb_private *priv = netdev_priv(ndev);
+
+	priv->msg_enable = value;
+}
+
+static const char ravb_gstrings_stats_gbeth[][ETH_GSTRING_LEN] = {
+	"rx_queue_0_current",
+	"tx_queue_0_current",
+	"rx_queue_0_dirty",
+	"tx_queue_0_dirty",
+	"rx_queue_0_packets",
+	"tx_queue_0_packets",
+	"rx_queue_0_bytes",
+	"tx_queue_0_bytes",
+	"rx_queue_0_mcast_packets",
+	"rx_queue_0_errors",
+	"rx_queue_0_crc_errors",
+	"rx_queue_0_frame_errors",
+	"rx_queue_0_length_errors",
+	"rx_queue_0_csum_offload_errors",
+	"rx_queue_0_over_errors",
+};
+
+static const char ravb_gstrings_stats[][ETH_GSTRING_LEN] = {
+	"rx_queue_0_current",
+	"tx_queue_0_current",
+	"rx_queue_0_dirty",
+	"tx_queue_0_dirty",
+	"rx_queue_0_packets",
+	"tx_queue_0_packets",
+	"rx_queue_0_bytes",
+	"tx_queue_0_bytes",
+	"rx_queue_0_mcast_packets",
+	"rx_queue_0_errors",
+	"rx_queue_0_crc_errors",
+	"rx_queue_0_frame_errors",
+	"rx_queue_0_length_errors",
+	"rx_queue_0_missed_errors",
+	"rx_queue_0_over_errors",
+
+	"rx_queue_1_current",
+	"tx_queue_1_current",
+	"rx_queue_1_dirty",
+	"tx_queue_1_dirty",
+	"rx_queue_1_packets",
+	"tx_queue_1_packets",
+	"rx_queue_1_bytes",
+	"tx_queue_1_bytes",
+	"rx_queue_1_mcast_packets",
+	"rx_queue_1_errors",
+	"rx_queue_1_crc_errors",
+	"rx_queue_1_frame_errors",
+	"rx_queue_1_length_errors",
+	"rx_queue_1_missed_errors",
+	"rx_queue_1_over_errors",
+};
+
+static int ravb_get_sset_count(struct net_device *netdev, int sset)
+{
+	struct ravb_private *priv = netdev_priv(netdev);
+	const struct ravb_hw_info *info = priv->info;
+
+	switch (sset) {
+	case ETH_SS_STATS:
+		return info->stats_len;
+	default:
+		return -EOPNOTSUPP;
+	}
+}
+
+static void ravb_get_ethtool_stats(struct net_device *ndev,
+				   struct ethtool_stats *estats, u64 *data)
+{
+	struct ravb_private *priv = netdev_priv(ndev);
+	const struct ravb_hw_info *info = priv->info;
+	int num_rx_q;
+	int i = 0;
+	int q;
+
+	num_rx_q = info->nc_queues ? NUM_RX_QUEUE : 1;
+	/* Device-specific stats */
+	for (q = RAVB_BE; q < num_rx_q; q++) {
+		struct net_device_stats *stats = &priv->stats[q];
+
+		data[i++] = priv->cur_rx[q];
+		data[i++] = priv->cur_tx[q];
+		data[i++] = priv->dirty_rx[q];
+		data[i++] = priv->dirty_tx[q];
+		data[i++] = stats->rx_packets;
+		data[i++] = stats->tx_packets;
+		data[i++] = stats->rx_bytes;
+		data[i++] = stats->tx_bytes;
+		data[i++] = stats->multicast;
+		data[i++] = stats->rx_errors;
+		data[i++] = stats->rx_crc_errors;
+		data[i++] = stats->rx_frame_errors;
+		data[i++] = stats->rx_length_errors;
+		data[i++] = stats->rx_missed_errors;
+		data[i++] = stats->rx_over_errors;
+	}
+}
+
+static void ravb_get_strings(struct net_device *ndev, u32 stringset, u8 *data)
+{
+	struct ravb_private *priv = netdev_priv(ndev);
+	const struct ravb_hw_info *info = priv->info;
+
+	switch (stringset) {
+	case ETH_SS_STATS:
+		memcpy(data, info->gstrings_stats, info->gstrings_size);
+		break;
+	}
+}
+
+static void ravb_get_ringparam(struct net_device *ndev,
+			       struct ethtool_ringparam *ring,
+			       struct kernel_ethtool_ringparam *kernel_ring,
+			       struct netlink_ext_ack *extack)
+{
+	struct ravb_private *priv = netdev_priv(ndev);
+
+	ring->rx_max_pending = BE_RX_RING_MAX;
+	ring->tx_max_pending = BE_TX_RING_MAX;
+	ring->rx_pending = priv->num_rx_ring[RAVB_BE];
+	ring->tx_pending = priv->num_tx_ring[RAVB_BE];
+}
+
+static int ravb_set_ringparam(struct net_device *ndev,
+			      struct ethtool_ringparam *ring,
+			      struct kernel_ethtool_ringparam *kernel_ring,
+			      struct netlink_ext_ack *extack)
+{
+	struct ravb_private *priv = netdev_priv(ndev);
+	const struct ravb_hw_info *info = priv->info;
+	int error;
+
+	if (ring->tx_pending > BE_TX_RING_MAX ||
+	    ring->rx_pending > BE_RX_RING_MAX ||
+	    ring->tx_pending < BE_TX_RING_MIN ||
+	    ring->rx_pending < BE_RX_RING_MIN)
+		return -EINVAL;
+	if (ring->rx_mini_pending || ring->rx_jumbo_pending)
+		return -EINVAL;
+
+	if (netif_running(ndev)) {
+		netif_device_detach(ndev);
+		/* Stop PTP Clock driver */
+		if (info->gptp)
+			ravb_ptp_stop(ndev);
+		/* Wait for DMA stopping */
+		error = ravb_stop_dma(ndev);
+		if (error) {
+			netdev_err(ndev,
+				   "cannot set ringparam! Any AVB processes are still running?\n");
+			return error;
+		}
+		synchronize_irq(ndev->irq);
+
+		/* Free all the skb's in the RX queue and the DMA buffers. */
+		ravb_ring_free(ndev, RAVB_BE);
+		if (info->nc_queues)
+			ravb_ring_free(ndev, RAVB_NC);
+	}
+
+	/* Set new parameters */
+	priv->num_rx_ring[RAVB_BE] = ring->rx_pending;
+	priv->num_tx_ring[RAVB_BE] = ring->tx_pending;
+
+	if (netif_running(ndev)) {
+		error = ravb_dmac_init(ndev);
+		if (error) {
+			netdev_err(ndev,
+				   "%s: ravb_dmac_init() failed, error %d\n",
+				   __func__, error);
+			return error;
+		}
+
+		ravb_emac_init(ndev);
+
+		/* Initialise PTP Clock driver */
+		if (info->gptp)
+			ravb_ptp_init(ndev, priv->pdev);
+
+		netif_device_attach(ndev);
+	}
+
+	return 0;
+}
+
+static int ravb_get_ts_info(struct net_device *ndev,
+			    struct ethtool_ts_info *info)
+{
+	struct ravb_private *priv = netdev_priv(ndev);
+	const struct ravb_hw_info *hw_info = priv->info;
+
+	info->so_timestamping =
+		SOF_TIMESTAMPING_TX_SOFTWARE |
+		SOF_TIMESTAMPING_RX_SOFTWARE |
+		SOF_TIMESTAMPING_SOFTWARE |
+		SOF_TIMESTAMPING_TX_HARDWARE |
+		SOF_TIMESTAMPING_RX_HARDWARE |
+		SOF_TIMESTAMPING_RAW_HARDWARE;
+	info->tx_types = (1 << HWTSTAMP_TX_OFF) | (1 << HWTSTAMP_TX_ON);
+	info->rx_filters =
+		(1 << HWTSTAMP_FILTER_NONE) |
+		(1 << HWTSTAMP_FILTER_PTP_V2_L2_EVENT) |
+		(1 << HWTSTAMP_FILTER_ALL);
+	if (hw_info->gptp || hw_info->ccc_gac)
+		info->phc_index = ptp_clock_index(priv->ptp.clock);
+
+	return 0;
+}
+
+static void ravb_get_wol(struct net_device *ndev, struct ethtool_wolinfo *wol)
+{
+	struct ravb_private *priv = netdev_priv(ndev);
+
+	wol->supported = WAKE_MAGIC;
+	wol->wolopts = priv->wol_enabled ? WAKE_MAGIC : 0;
+}
+
+static int ravb_set_wol(struct net_device *ndev, struct ethtool_wolinfo *wol)
+{
+	struct ravb_private *priv = netdev_priv(ndev);
+	const struct ravb_hw_info *info = priv->info;
+
+	if (!info->magic_pkt || (wol->wolopts & ~WAKE_MAGIC))
+		return -EOPNOTSUPP;
+
+	priv->wol_enabled = !!(wol->wolopts & WAKE_MAGIC);
+
+	device_set_wakeup_enable(&priv->pdev->dev, priv->wol_enabled);
+
+	return 0;
+}
+
+static const struct ethtool_ops ravb_ethtool_ops = {
+	.nway_reset		= phy_ethtool_nway_reset,
+	.get_msglevel		= ravb_get_msglevel,
+	.set_msglevel		= ravb_set_msglevel,
+	.get_link		= ethtool_op_get_link,
+	.get_strings		= ravb_get_strings,
+	.get_ethtool_stats	= ravb_get_ethtool_stats,
+	.get_sset_count		= ravb_get_sset_count,
+	.get_ringparam		= ravb_get_ringparam,
+	.set_ringparam		= ravb_set_ringparam,
+	.get_ts_info		= ravb_get_ts_info,
+	.get_link_ksettings	= phy_ethtool_get_link_ksettings,
+	.set_link_ksettings	= phy_ethtool_set_link_ksettings,
+	.get_wol		= ravb_get_wol,
+	.set_wol		= ravb_set_wol,
+};
+
+static inline int ravb_hook_irq(unsigned int irq, irq_handler_t handler,
+				struct net_device *ndev, struct device *dev,
+				const char *ch)
+{
+	char *name;
+	int error;
+
+	name = devm_kasprintf(dev, GFP_KERNEL, "%s:%s", ndev->name, ch);
+	if (!name)
+		return -ENOMEM;
+	error = request_irq(irq, handler, 0, name, ndev);
+	if (error)
+		netdev_err(ndev, "cannot request IRQ %s\n", name);
+
+	return error;
+}
+
+/* Network device open function for Ethernet AVB */
+static int ravb_open(struct net_device *ndev)
+{
+	struct ravb_private *priv = netdev_priv(ndev);
+	const struct ravb_hw_info *info = priv->info;
+	struct platform_device *pdev = priv->pdev;
+	struct device *dev = &pdev->dev;
+	int error;
+
+	napi_enable(&priv->napi[RAVB_BE]);
+	if (info->nc_queues)
+		napi_enable(&priv->napi[RAVB_NC]);
+
+	if (!info->multi_irqs) {
+		error = request_irq(ndev->irq, ravb_interrupt, IRQF_SHARED,
+				    ndev->name, ndev);
+		if (error) {
+			netdev_err(ndev, "cannot request IRQ\n");
+			goto out_napi_off;
+		}
+	} else {
+		error = ravb_hook_irq(ndev->irq, ravb_multi_interrupt, ndev,
+				      dev, "ch22:multi");
+		if (error)
+			goto out_napi_off;
+		error = ravb_hook_irq(priv->emac_irq, ravb_emac_interrupt, ndev,
+				      dev, "ch24:emac");
+		if (error)
+			goto out_free_irq;
+		error = ravb_hook_irq(priv->rx_irqs[RAVB_BE], ravb_be_interrupt,
+				      ndev, dev, "ch0:rx_be");
+		if (error)
+			goto out_free_irq_emac;
+		error = ravb_hook_irq(priv->tx_irqs[RAVB_BE], ravb_be_interrupt,
+				      ndev, dev, "ch18:tx_be");
+		if (error)
+			goto out_free_irq_be_rx;
+		error = ravb_hook_irq(priv->rx_irqs[RAVB_NC], ravb_nc_interrupt,
+				      ndev, dev, "ch1:rx_nc");
+		if (error)
+			goto out_free_irq_be_tx;
+		error = ravb_hook_irq(priv->tx_irqs[RAVB_NC], ravb_nc_interrupt,
+				      ndev, dev, "ch19:tx_nc");
+		if (error)
+			goto out_free_irq_nc_rx;
+
+		if (info->err_mgmt_irqs) {
+			error = ravb_hook_irq(priv->erra_irq, ravb_multi_interrupt,
+					      ndev, dev, "err_a");
+			if (error)
+				goto out_free_irq_nc_tx;
+			error = ravb_hook_irq(priv->mgmta_irq, ravb_multi_interrupt,
+					      ndev, dev, "mgmt_a");
+			if (error)
+				goto out_free_irq_erra;
+		}
+	}
+
+	/* Device init */
+	error = ravb_dmac_init(ndev);
+	if (error)
+		goto out_free_irq_mgmta;
+	ravb_emac_init(ndev);
+
+	/* Initialise PTP Clock driver */
+	if (info->gptp)
+		ravb_ptp_init(ndev, priv->pdev);
+
+	/* PHY control start */
+	error = ravb_phy_start(ndev);
+	if (error)
+		goto out_ptp_stop;
+
+	netif_tx_start_all_queues(ndev);
+
+	return 0;
+
+out_ptp_stop:
+	/* Stop PTP Clock driver */
+	if (info->gptp)
+		ravb_ptp_stop(ndev);
+	ravb_stop_dma(ndev);
+out_free_irq_mgmta:
+	if (!info->multi_irqs)
+		goto out_free_irq;
+	if (info->err_mgmt_irqs)
+		free_irq(priv->mgmta_irq, ndev);
+out_free_irq_erra:
+	if (info->err_mgmt_irqs)
+		free_irq(priv->erra_irq, ndev);
+out_free_irq_nc_tx:
+	free_irq(priv->tx_irqs[RAVB_NC], ndev);
+out_free_irq_nc_rx:
+	free_irq(priv->rx_irqs[RAVB_NC], ndev);
+out_free_irq_be_tx:
+	free_irq(priv->tx_irqs[RAVB_BE], ndev);
+out_free_irq_be_rx:
+	free_irq(priv->rx_irqs[RAVB_BE], ndev);
+out_free_irq_emac:
+	free_irq(priv->emac_irq, ndev);
+out_free_irq:
+	free_irq(ndev->irq, ndev);
+out_napi_off:
+	if (info->nc_queues)
+		napi_disable(&priv->napi[RAVB_NC]);
+	napi_disable(&priv->napi[RAVB_BE]);
+	return error;
+}
+
+/* Timeout function for Ethernet AVB */
+static void ravb_tx_timeout(struct net_device *ndev, unsigned int txqueue)
+{
+	struct ravb_private *priv = netdev_priv(ndev);
+
+	netif_err(priv, tx_err, ndev,
+		  "transmit timed out, status %08x, resetting...\n",
+		  ravb_read(ndev, ISS));
+
+	/* tx_errors count up */
+	ndev->stats.tx_errors++;
+
+	schedule_work(&priv->work);
+}
+
+static void ravb_tx_timeout_work(struct work_struct *work)
+{
+	struct ravb_private *priv = container_of(work, struct ravb_private,
+						 work);
+	const struct ravb_hw_info *info = priv->info;
+	struct net_device *ndev = priv->ndev;
+	int error;
+
+	if (!rtnl_trylock()) {
+		usleep_range(1000, 2000);
+		schedule_work(&priv->work);
+		return;
+	}
+
+	netif_tx_stop_all_queues(ndev);
+
+	/* Stop PTP Clock driver */
+	if (info->gptp)
+		ravb_ptp_stop(ndev);
+
+	/* Wait for DMA stopping */
+	if (ravb_stop_dma(ndev)) {
+		/* If ravb_stop_dma() fails, the hardware is still operating
+		 * for TX and/or RX. So, this should not call the following
+		 * functions because ravb_dmac_init() is possible to fail too.
+		 * Also, this should not retry ravb_stop_dma() again and again
+		 * here because it's possible to wait forever. So, this just
+		 * re-enables the TX and RX and skip the following
+		 * re-initialization procedure.
+		 */
+		ravb_rcv_snd_enable(ndev);
+		goto out;
+	}
+
+	ravb_ring_free(ndev, RAVB_BE);
+	if (info->nc_queues)
+		ravb_ring_free(ndev, RAVB_NC);
+
+	/* Device init */
+	error = ravb_dmac_init(ndev);
+	if (error) {
+		/* If ravb_dmac_init() fails, descriptors are freed. So, this
+		 * should return here to avoid re-enabling the TX and RX in
+		 * ravb_emac_init().
+		 */
+		netdev_err(ndev, "%s: ravb_dmac_init() failed, error %d\n",
+			   __func__, error);
+		goto out_unlock;
+	}
+	ravb_emac_init(ndev);
+
+out:
+	/* Initialise PTP Clock driver */
+	if (info->gptp)
+		ravb_ptp_init(ndev, priv->pdev);
+
+	netif_tx_start_all_queues(ndev);
+
+out_unlock:
+	rtnl_unlock();
+}
+
+/* Packet transmit function for Ethernet AVB */
+static netdev_tx_t ravb_start_xmit(struct sk_buff *skb, struct net_device *ndev)
+{
+	struct ravb_private *priv = netdev_priv(ndev);
+	const struct ravb_hw_info *info = priv->info;
+	unsigned int num_tx_desc = priv->num_tx_desc;
+	u16 q = skb_get_queue_mapping(skb);
+	struct ravb_tstamp_skb *ts_skb;
+	struct ravb_tx_desc *desc;
+	unsigned long flags;
+	dma_addr_t dma_addr;
+	void *buffer;
+	u32 entry;
+	u32 len;
+
+	spin_lock_irqsave(&priv->lock, flags);
+	if (priv->cur_tx[q] - priv->dirty_tx[q] > (priv->num_tx_ring[q] - 1) *
+	    num_tx_desc) {
+		netif_err(priv, tx_queued, ndev,
+			  "still transmitting with the full ring!\n");
+		netif_stop_subqueue(ndev, q);
+		spin_unlock_irqrestore(&priv->lock, flags);
+		return NETDEV_TX_BUSY;
+	}
+
+	if (skb_put_padto(skb, ETH_ZLEN))
+		goto exit;
+
+	entry = priv->cur_tx[q] % (priv->num_tx_ring[q] * num_tx_desc);
+	priv->tx_skb[q][entry / num_tx_desc] = skb;
+
+	if (num_tx_desc > 1) {
+		buffer = PTR_ALIGN(priv->tx_align[q], DPTR_ALIGN) +
+			 entry / num_tx_desc * DPTR_ALIGN;
+		len = PTR_ALIGN(skb->data, DPTR_ALIGN) - skb->data;
+
+		/* Zero length DMA descriptors are problematic as they seem
+		 * to terminate DMA transfers. Avoid them by simply using a
+		 * length of DPTR_ALIGN (4) when skb data is aligned to
+		 * DPTR_ALIGN.
+		 *
+		 * As skb is guaranteed to have at least ETH_ZLEN (60)
+		 * bytes of data by the call to skb_put_padto() above this
+		 * is safe with respect to both the length of the first DMA
+		 * descriptor (len) overflowing the available data and the
+		 * length of the second DMA descriptor (skb->len - len)
+		 * being negative.
+		 */
+		if (len == 0)
+			len = DPTR_ALIGN;
+
+		memcpy(buffer, skb->data, len);
+		dma_addr = dma_map_single(ndev->dev.parent, buffer, len,
+					  DMA_TO_DEVICE);
+		if (dma_mapping_error(ndev->dev.parent, dma_addr))
+			goto drop;
+
+		desc = &priv->tx_ring[q][entry];
+		desc->ds_tagl = cpu_to_le16(len);
+		desc->dptr = cpu_to_le32(dma_addr);
+
+		buffer = skb->data + len;
+		len = skb->len - len;
+		dma_addr = dma_map_single(ndev->dev.parent, buffer, len,
+					  DMA_TO_DEVICE);
+		if (dma_mapping_error(ndev->dev.parent, dma_addr))
+			goto unmap;
+
+		desc++;
+	} else {
+		desc = &priv->tx_ring[q][entry];
+		len = skb->len;
+		dma_addr = dma_map_single(ndev->dev.parent, skb->data, skb->len,
+					  DMA_TO_DEVICE);
+		if (dma_mapping_error(ndev->dev.parent, dma_addr))
+			goto drop;
+	}
+	desc->ds_tagl = cpu_to_le16(len);
+	desc->dptr = cpu_to_le32(dma_addr);
+
+	/* TX timestamp required */
+	if (info->gptp || info->ccc_gac) {
+		if (q == RAVB_NC) {
+			ts_skb = kmalloc(sizeof(*ts_skb), GFP_ATOMIC);
+			if (!ts_skb) {
+				if (num_tx_desc > 1) {
+					desc--;
+					dma_unmap_single(ndev->dev.parent, dma_addr,
+							 len, DMA_TO_DEVICE);
+				}
+				goto unmap;
+			}
+			ts_skb->skb = skb_get(skb);
+			ts_skb->tag = priv->ts_skb_tag++;
+			priv->ts_skb_tag &= 0x3ff;
+			list_add_tail(&ts_skb->list, &priv->ts_skb_list);
+
+			/* TAG and timestamp required flag */
+			skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
+			desc->tagh_tsr = (ts_skb->tag >> 4) | TX_TSR;
+			desc->ds_tagl |= cpu_to_le16(ts_skb->tag << 12);
+		}
+
+		skb_tx_timestamp(skb);
+	}
+	/* Descriptor type must be set after all the above writes */
+	dma_wmb();
+	if (num_tx_desc > 1) {
+		desc->die_dt = DT_FEND;
+		desc--;
+		desc->die_dt = DT_FSTART;
+	} else {
+		desc->die_dt = DT_FSINGLE;
+	}
+	ravb_modify(ndev, TCCR, TCCR_TSRQ0 << q, TCCR_TSRQ0 << q);
+
+	priv->cur_tx[q] += num_tx_desc;
+	if (priv->cur_tx[q] - priv->dirty_tx[q] >
+	    (priv->num_tx_ring[q] - 1) * num_tx_desc &&
+	    !ravb_tx_free(ndev, q, true))
+		netif_stop_subqueue(ndev, q);
+
+exit:
+	spin_unlock_irqrestore(&priv->lock, flags);
+	return NETDEV_TX_OK;
+
+unmap:
+	dma_unmap_single(ndev->dev.parent, le32_to_cpu(desc->dptr),
+			 le16_to_cpu(desc->ds_tagl), DMA_TO_DEVICE);
+drop:
+	dev_kfree_skb_any(skb);
+	priv->tx_skb[q][entry / num_tx_desc] = NULL;
+	goto exit;
+}
+
+static u16 ravb_select_queue(struct net_device *ndev, struct sk_buff *skb,
+			     struct net_device *sb_dev)
+{
+	/* If skb needs TX timestamp, it is handled in network control queue */
+	return (skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) ? RAVB_NC :
+							       RAVB_BE;
+
+}
+
+static struct net_device_stats *ravb_get_stats(struct net_device *ndev)
+{
+	struct ravb_private *priv = netdev_priv(ndev);
+	const struct ravb_hw_info *info = priv->info;
+	struct net_device_stats *nstats, *stats0, *stats1;
+
+	nstats = &ndev->stats;
+	stats0 = &priv->stats[RAVB_BE];
+
+	if (info->tx_counters) {
+		nstats->tx_dropped += ravb_read(ndev, TROCR);
+		ravb_write(ndev, 0, TROCR);	/* (write clear) */
+	}
+
+	if (info->carrier_counters) {
+		nstats->collisions += ravb_read(ndev, CXR41);
+		ravb_write(ndev, 0, CXR41);	/* (write clear) */
+		nstats->tx_carrier_errors += ravb_read(ndev, CXR42);
+		ravb_write(ndev, 0, CXR42);	/* (write clear) */
+	}
+
+	nstats->rx_packets = stats0->rx_packets;
+	nstats->tx_packets = stats0->tx_packets;
+	nstats->rx_bytes = stats0->rx_bytes;
+	nstats->tx_bytes = stats0->tx_bytes;
+	nstats->multicast = stats0->multicast;
+	nstats->rx_errors = stats0->rx_errors;
+	nstats->rx_crc_errors = stats0->rx_crc_errors;
+	nstats->rx_frame_errors = stats0->rx_frame_errors;
+	nstats->rx_length_errors = stats0->rx_length_errors;
+	nstats->rx_missed_errors = stats0->rx_missed_errors;
+	nstats->rx_over_errors = stats0->rx_over_errors;
+	if (info->nc_queues) {
+		stats1 = &priv->stats[RAVB_NC];
+
+		nstats->rx_packets += stats1->rx_packets;
+		nstats->tx_packets += stats1->tx_packets;
+		nstats->rx_bytes += stats1->rx_bytes;
+		nstats->tx_bytes += stats1->tx_bytes;
+		nstats->multicast += stats1->multicast;
+		nstats->rx_errors += stats1->rx_errors;
+		nstats->rx_crc_errors += stats1->rx_crc_errors;
+		nstats->rx_frame_errors += stats1->rx_frame_errors;
+		nstats->rx_length_errors += stats1->rx_length_errors;
+		nstats->rx_missed_errors += stats1->rx_missed_errors;
+		nstats->rx_over_errors += stats1->rx_over_errors;
+	}
+
+	return nstats;
+}
+
+/* Update promiscuous bit */
+static void ravb_set_rx_mode(struct net_device *ndev)
+{
+	struct ravb_private *priv = netdev_priv(ndev);
+	unsigned long flags;
+
+	spin_lock_irqsave(&priv->lock, flags);
+	ravb_modify(ndev, ECMR, ECMR_PRM,
+		    ndev->flags & IFF_PROMISC ? ECMR_PRM : 0);
+	spin_unlock_irqrestore(&priv->lock, flags);
+}
+
+/* Device close function for Ethernet AVB */
+static int ravb_close(struct net_device *ndev)
+{
+	struct device_node *np = ndev->dev.parent->of_node;
+	struct ravb_private *priv = netdev_priv(ndev);
+	const struct ravb_hw_info *info = priv->info;
+	struct ravb_tstamp_skb *ts_skb, *ts_skb2;
+
+	netif_tx_stop_all_queues(ndev);
+
+	/* Disable interrupts by clearing the interrupt masks. */
+	ravb_write(ndev, 0, RIC0);
+	ravb_write(ndev, 0, RIC2);
+	ravb_write(ndev, 0, TIC);
+
+	/* Stop PTP Clock driver */
+	if (info->gptp)
+		ravb_ptp_stop(ndev);
+
+	/* Set the config mode to stop the AVB-DMAC's processes */
+	if (ravb_stop_dma(ndev) < 0)
+		netdev_err(ndev,
+			   "device will be stopped after h/w processes are done.\n");
+
+	/* Clear the timestamp list */
+	if (info->gptp || info->ccc_gac) {
+		list_for_each_entry_safe(ts_skb, ts_skb2, &priv->ts_skb_list, list) {
+			list_del(&ts_skb->list);
+			kfree_skb(ts_skb->skb);
+			kfree(ts_skb);
+		}
+	}
+
+	/* PHY disconnect */
+	if (ndev->phydev) {
+		phy_stop(ndev->phydev);
+		phy_disconnect(ndev->phydev);
+		if (of_phy_is_fixed_link(np))
+			of_phy_deregister_fixed_link(np);
+	}
+
+	cancel_work_sync(&priv->work);
+
+	if (info->multi_irqs) {
+		free_irq(priv->tx_irqs[RAVB_NC], ndev);
+		free_irq(priv->rx_irqs[RAVB_NC], ndev);
+		free_irq(priv->tx_irqs[RAVB_BE], ndev);
+		free_irq(priv->rx_irqs[RAVB_BE], ndev);
+		free_irq(priv->emac_irq, ndev);
+		if (info->err_mgmt_irqs) {
+			free_irq(priv->erra_irq, ndev);
+			free_irq(priv->mgmta_irq, ndev);
+		}
+	}
+	free_irq(ndev->irq, ndev);
+
+	if (info->nc_queues)
+		napi_disable(&priv->napi[RAVB_NC]);
+	napi_disable(&priv->napi[RAVB_BE]);
+
+	/* Free all the skb's in the RX queue and the DMA buffers. */
+	ravb_ring_free(ndev, RAVB_BE);
+	if (info->nc_queues)
+		ravb_ring_free(ndev, RAVB_NC);
+
+	return 0;
+}
+
+static int ravb_hwtstamp_get(struct net_device *ndev, struct ifreq *req)
+{
+	struct ravb_private *priv = netdev_priv(ndev);
+	struct hwtstamp_config config;
+
+	config.flags = 0;
+	config.tx_type = priv->tstamp_tx_ctrl ? HWTSTAMP_TX_ON :
+						HWTSTAMP_TX_OFF;
+	switch (priv->tstamp_rx_ctrl & RAVB_RXTSTAMP_TYPE) {
+	case RAVB_RXTSTAMP_TYPE_V2_L2_EVENT:
+		config.rx_filter = HWTSTAMP_FILTER_PTP_V2_L2_EVENT;
+		break;
+	case RAVB_RXTSTAMP_TYPE_ALL:
+		config.rx_filter = HWTSTAMP_FILTER_ALL;
+		break;
+	default:
+		config.rx_filter = HWTSTAMP_FILTER_NONE;
+	}
+
+	return copy_to_user(req->ifr_data, &config, sizeof(config)) ?
+		-EFAULT : 0;
+}
+
+/* Control hardware time stamping */
+static int ravb_hwtstamp_set(struct net_device *ndev, struct ifreq *req)
+{
+	struct ravb_private *priv = netdev_priv(ndev);
+	struct hwtstamp_config config;
+	u32 tstamp_rx_ctrl = RAVB_RXTSTAMP_ENABLED;
+	u32 tstamp_tx_ctrl;
+
+	if (copy_from_user(&config, req->ifr_data, sizeof(config)))
+		return -EFAULT;
+
+	switch (config.tx_type) {
+	case HWTSTAMP_TX_OFF:
+		tstamp_tx_ctrl = 0;
+		break;
+	case HWTSTAMP_TX_ON:
+		tstamp_tx_ctrl = RAVB_TXTSTAMP_ENABLED;
+		break;
+	default:
+		return -ERANGE;
+	}
+
+	switch (config.rx_filter) {
+	case HWTSTAMP_FILTER_NONE:
+		tstamp_rx_ctrl = 0;
+		break;
+	case HWTSTAMP_FILTER_PTP_V2_L2_EVENT:
+		tstamp_rx_ctrl |= RAVB_RXTSTAMP_TYPE_V2_L2_EVENT;
+		break;
+	default:
+		config.rx_filter = HWTSTAMP_FILTER_ALL;
+		tstamp_rx_ctrl |= RAVB_RXTSTAMP_TYPE_ALL;
+	}
+
+	priv->tstamp_tx_ctrl = tstamp_tx_ctrl;
+	priv->tstamp_rx_ctrl = tstamp_rx_ctrl;
+
+	return copy_to_user(req->ifr_data, &config, sizeof(config)) ?
+		-EFAULT : 0;
+}
+
+/* ioctl to device function */
+static int ravb_do_ioctl(struct net_device *ndev, struct ifreq *req, int cmd)
+{
+	struct phy_device *phydev = ndev->phydev;
+
+	if (!netif_running(ndev))
+		return -EINVAL;
+
+	if (!phydev)
+		return -ENODEV;
+
+	switch (cmd) {
+	case SIOCGHWTSTAMP:
+		return ravb_hwtstamp_get(ndev, req);
+	case SIOCSHWTSTAMP:
+		return ravb_hwtstamp_set(ndev, req);
+	}
+
+	return phy_mii_ioctl(phydev, req, cmd);
+}
+
+static int ravb_change_mtu(struct net_device *ndev, int new_mtu)
+{
+	struct ravb_private *priv = netdev_priv(ndev);
+
+	ndev->mtu = new_mtu;
+
+	if (netif_running(ndev)) {
+		synchronize_irq(priv->emac_irq);
+		ravb_emac_init(ndev);
+	}
+
+	netdev_update_features(ndev);
+
+	return 0;
+}
+
+static void ravb_set_rx_csum(struct net_device *ndev, bool enable)
+{
+	struct ravb_private *priv = netdev_priv(ndev);
+	unsigned long flags;
+
+	spin_lock_irqsave(&priv->lock, flags);
+
+	/* Disable TX and RX */
+	ravb_rcv_snd_disable(ndev);
+
+	/* Modify RX Checksum setting */
+	ravb_modify(ndev, ECMR, ECMR_RCSC, enable ? ECMR_RCSC : 0);
+
+	/* Enable TX and RX */
+	ravb_rcv_snd_enable(ndev);
+
+	spin_unlock_irqrestore(&priv->lock, flags);
+}
+
+static int ravb_set_features_gbeth(struct net_device *ndev,
+				   netdev_features_t features)
+{
+	/* Place holder */
+	return 0;
+}
+
+static int ravb_set_features_rcar(struct net_device *ndev,
+				  netdev_features_t features)
+{
+	netdev_features_t changed = ndev->features ^ features;
+
+	if (changed & NETIF_F_RXCSUM)
+		ravb_set_rx_csum(ndev, features & NETIF_F_RXCSUM);
+
+	ndev->features = features;
+
+	return 0;
+}
+
+static int ravb_set_features(struct net_device *ndev,
+			     netdev_features_t features)
+{
+	struct ravb_private *priv = netdev_priv(ndev);
+	const struct ravb_hw_info *info = priv->info;
+
+	return info->set_feature(ndev, features);
+}
+
+static const struct net_device_ops ravb_netdev_ops = {
+	.ndo_open		= ravb_open,
+	.ndo_stop		= ravb_close,
+	.ndo_start_xmit		= ravb_start_xmit,
+	.ndo_select_queue	= ravb_select_queue,
+	.ndo_get_stats		= ravb_get_stats,
+	.ndo_set_rx_mode	= ravb_set_rx_mode,
+	.ndo_tx_timeout		= ravb_tx_timeout,
+	.ndo_eth_ioctl		= ravb_do_ioctl,
+	.ndo_change_mtu		= ravb_change_mtu,
+	.ndo_validate_addr	= eth_validate_addr,
+	.ndo_set_mac_address	= eth_mac_addr,
+	.ndo_set_features	= ravb_set_features,
+};
+
+/* MDIO bus init function */
+static int ravb_mdio_init(struct ravb_private *priv)
+{
+	struct platform_device *pdev = priv->pdev;
+	struct device *dev = &pdev->dev;
+	struct phy_device *phydev;
+	struct device_node *pn;
+	int error;
+
+	/* Bitbang init */
+	priv->mdiobb.ops = &bb_ops;
+
+	/* MII controller setting */
+	priv->mii_bus = alloc_mdio_bitbang(&priv->mdiobb);
+	if (!priv->mii_bus)
+		return -ENOMEM;
+
+	/* Hook up MII support for ethtool */
+	priv->mii_bus->name = "ravb_mii";
+	priv->mii_bus->parent = dev;
+	snprintf(priv->mii_bus->id, MII_BUS_ID_SIZE, "%s-%x",
+		 pdev->name, pdev->id);
+
+	/* Register MDIO bus */
+	error = of_mdiobus_register(priv->mii_bus, dev->of_node);
+	if (error)
+		goto out_free_bus;
+
+	pn = of_parse_phandle(dev->of_node, "phy-handle", 0);
+	phydev = of_phy_find_device(pn);
+	if (phydev) {
+		phydev->mac_managed_pm = true;
+		put_device(&phydev->mdio.dev);
+	}
+	of_node_put(pn);
+
+	return 0;
+
+out_free_bus:
+	free_mdio_bitbang(priv->mii_bus);
+	return error;
+}
+
+/* MDIO bus release function */
+static int ravb_mdio_release(struct ravb_private *priv)
+{
+	/* Unregister mdio bus */
+	mdiobus_unregister(priv->mii_bus);
+
+	/* Free bitbang info */
+	free_mdio_bitbang(priv->mii_bus);
+
+	return 0;
+}
+
+static const struct ravb_hw_info ravb_gen3_hw_info = {
+	.rx_ring_free = ravb_rx_ring_free_rcar,
+	.rx_ring_format = ravb_rx_ring_format_rcar,
+	.alloc_rx_desc = ravb_alloc_rx_desc_rcar,
+	.receive = ravb_rx_rcar,
+	.set_rate = ravb_set_rate_rcar,
+	.set_feature = ravb_set_features_rcar,
+	.dmac_init = ravb_dmac_init_rcar,
+	.emac_init = ravb_emac_init_rcar,
+	.gstrings_stats = ravb_gstrings_stats,
+	.gstrings_size = sizeof(ravb_gstrings_stats),
+	.net_hw_features = NETIF_F_RXCSUM,
+	.net_features = NETIF_F_RXCSUM,
+	.stats_len = ARRAY_SIZE(ravb_gstrings_stats),
+	.max_rx_len = RX_BUF_SZ + RAVB_ALIGN - 1,
+	.tccr_mask = TCCR_TSRQ0 | TCCR_TSRQ1 | TCCR_TSRQ2 | TCCR_TSRQ3,
+	.rx_max_buf_size = SZ_2K,
+	.internal_delay = 1,
+	.tx_counters = 1,
+	.multi_irqs = 1,
+	.irq_en_dis = 1,
+	.ccc_gac = 1,
+	.nc_queues = 1,
+	.magic_pkt = 1,
+};
+
+static const struct ravb_hw_info ravb_gen2_hw_info = {
+	.rx_ring_free = ravb_rx_ring_free_rcar,
+	.rx_ring_format = ravb_rx_ring_format_rcar,
+	.alloc_rx_desc = ravb_alloc_rx_desc_rcar,
+	.receive = ravb_rx_rcar,
+	.set_rate = ravb_set_rate_rcar,
+	.set_feature = ravb_set_features_rcar,
+	.dmac_init = ravb_dmac_init_rcar,
+	.emac_init = ravb_emac_init_rcar,
+	.gstrings_stats = ravb_gstrings_stats,
+	.gstrings_size = sizeof(ravb_gstrings_stats),
+	.net_hw_features = NETIF_F_RXCSUM,
+	.net_features = NETIF_F_RXCSUM,
+	.stats_len = ARRAY_SIZE(ravb_gstrings_stats),
+	.max_rx_len = RX_BUF_SZ + RAVB_ALIGN - 1,
+	.tccr_mask = TCCR_TSRQ0 | TCCR_TSRQ1 | TCCR_TSRQ2 | TCCR_TSRQ3,
+	.rx_max_buf_size = SZ_2K,
+	.aligned_tx = 1,
+	.gptp = 1,
+	.nc_queues = 1,
+	.magic_pkt = 1,
+};
+
+static const struct ravb_hw_info ravb_rzv2m_hw_info = {
+	.rx_ring_free = ravb_rx_ring_free_rcar,
+	.rx_ring_format = ravb_rx_ring_format_rcar,
+	.alloc_rx_desc = ravb_alloc_rx_desc_rcar,
+	.receive = ravb_rx_rcar,
+	.set_rate = ravb_set_rate_rcar,
+	.set_feature = ravb_set_features_rcar,
+	.dmac_init = ravb_dmac_init_rcar,
+	.emac_init = ravb_emac_init_rcar,
+	.gstrings_stats = ravb_gstrings_stats,
+	.gstrings_size = sizeof(ravb_gstrings_stats),
+	.net_hw_features = NETIF_F_RXCSUM,
+	.net_features = NETIF_F_RXCSUM,
+	.stats_len = ARRAY_SIZE(ravb_gstrings_stats),
+	.max_rx_len = RX_BUF_SZ + RAVB_ALIGN - 1,
+	.tccr_mask = TCCR_TSRQ0 | TCCR_TSRQ1 | TCCR_TSRQ2 | TCCR_TSRQ3,
+	.rx_max_buf_size = SZ_2K,
+	.multi_irqs = 1,
+	.err_mgmt_irqs = 1,
+	.gptp = 1,
+	.gptp_ref_clk = 1,
+	.nc_queues = 1,
+	.magic_pkt = 1,
+};
+
+static const struct ravb_hw_info gbeth_hw_info = {
+	.rx_ring_free = ravb_rx_ring_free_gbeth,
+	.rx_ring_format = ravb_rx_ring_format_gbeth,
+	.alloc_rx_desc = ravb_alloc_rx_desc_gbeth,
+	.receive = ravb_rx_gbeth,
+	.set_rate = ravb_set_rate_gbeth,
+	.set_feature = ravb_set_features_gbeth,
+	.dmac_init = ravb_dmac_init_gbeth,
+	.emac_init = ravb_emac_init_gbeth,
+	.gstrings_stats = ravb_gstrings_stats_gbeth,
+	.gstrings_size = sizeof(ravb_gstrings_stats_gbeth),
+	.stats_len = ARRAY_SIZE(ravb_gstrings_stats_gbeth),
+	.max_rx_len = ALIGN(GBETH_RX_BUFF_MAX, RAVB_ALIGN),
+	.tccr_mask = TCCR_TSRQ0,
+	.rx_max_buf_size = SZ_8K,
+	.aligned_tx = 1,
+	.tx_counters = 1,
+	.carrier_counters = 1,
+	.half_duplex = 1,
+};
+
+static const struct of_device_id ravb_match_table[] = {
+	{ .compatible = "renesas,etheravb-r8a7790", .data = &ravb_gen2_hw_info },
+	{ .compatible = "renesas,etheravb-r8a7794", .data = &ravb_gen2_hw_info },
+	{ .compatible = "renesas,etheravb-rcar-gen2", .data = &ravb_gen2_hw_info },
+	{ .compatible = "renesas,etheravb-r8a7795", .data = &ravb_gen3_hw_info },
+	{ .compatible = "renesas,etheravb-rcar-gen3", .data = &ravb_gen3_hw_info },
+	{ .compatible = "renesas,etheravb-rcar-gen4", .data = &ravb_gen3_hw_info },
+	{ .compatible = "renesas,etheravb-rzv2m", .data = &ravb_rzv2m_hw_info },
+	{ .compatible = "renesas,rzg2l-gbeth", .data = &gbeth_hw_info },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, ravb_match_table);
+
+static int ravb_set_gti(struct net_device *ndev)
+{
+	struct ravb_private *priv = netdev_priv(ndev);
+	const struct ravb_hw_info *info = priv->info;
+	struct device *dev = ndev->dev.parent;
+	unsigned long rate;
+	uint64_t inc;
+
+	if (info->gptp_ref_clk)
+		rate = clk_get_rate(priv->gptp_clk);
+	else
+		rate = clk_get_rate(priv->clk);
+	if (!rate)
+		return -EINVAL;
+
+	inc = div64_ul(1000000000ULL << 20, rate);
+
+	if (inc < GTI_TIV_MIN || inc > GTI_TIV_MAX) {
+		dev_err(dev, "gti.tiv increment 0x%llx is outside the range 0x%x - 0x%x\n",
+			inc, GTI_TIV_MIN, GTI_TIV_MAX);
+		return -EINVAL;
+	}
+
+	ravb_write(ndev, inc, GTI);
+
+	return 0;
+}
+
+static int ravb_set_config_mode(struct net_device *ndev)
+{
+	struct ravb_private *priv = netdev_priv(ndev);
+	const struct ravb_hw_info *info = priv->info;
+	int error;
+
+	if (info->gptp) {
+		error = ravb_set_opmode(ndev, CCC_OPC_CONFIG);
+		if (error)
+			return error;
+		/* Set CSEL value */
+		ravb_modify(ndev, CCC, CCC_CSEL, CCC_CSEL_HPB);
+	} else if (info->ccc_gac) {
+		error = ravb_set_opmode(ndev, CCC_OPC_CONFIG | CCC_GAC | CCC_CSEL_HPB);
+	} else {
+		error = ravb_set_opmode(ndev, CCC_OPC_CONFIG);
+	}
+
+	return error;
+}
+
+/* Set tx and rx clock internal delay modes */
+static void ravb_parse_delay_mode(struct device_node *np, struct net_device *ndev)
+{
+	struct ravb_private *priv = netdev_priv(ndev);
+	bool explicit_delay = false;
+	u32 delay;
+
+	if (!of_property_read_u32(np, "rx-internal-delay-ps", &delay)) {
+		/* Valid values are 0 and 1800, according to DT bindings */
+		priv->rxcidm = !!delay;
+		explicit_delay = true;
+	}
+	if (!of_property_read_u32(np, "tx-internal-delay-ps", &delay)) {
+		/* Valid values are 0 and 2000, according to DT bindings */
+		priv->txcidm = !!delay;
+		explicit_delay = true;
+	}
+
+	if (explicit_delay)
+		return;
+
+	/* Fall back to legacy rgmii-*id behavior */
+	if (priv->phy_interface == PHY_INTERFACE_MODE_RGMII_ID ||
+	    priv->phy_interface == PHY_INTERFACE_MODE_RGMII_RXID) {
+		priv->rxcidm = 1;
+		priv->rgmii_override = 1;
+	}
+
+	if (priv->phy_interface == PHY_INTERFACE_MODE_RGMII_ID ||
+	    priv->phy_interface == PHY_INTERFACE_MODE_RGMII_TXID) {
+		priv->txcidm = 1;
+		priv->rgmii_override = 1;
+	}
+}
+
+static void ravb_set_delay_mode(struct net_device *ndev)
+{
+	struct ravb_private *priv = netdev_priv(ndev);
+	u32 set = 0;
+
+	if (priv->rxcidm)
+		set |= APSR_RDM;
+	if (priv->txcidm)
+		set |= APSR_TDM;
+	ravb_modify(ndev, APSR, APSR_RDM | APSR_TDM, set);
+}
+
+static int ravb_probe(struct platform_device *pdev)
+{
+	struct device_node *np = pdev->dev.of_node;
+	const struct ravb_hw_info *info;
+	struct reset_control *rstc;
+	struct ravb_private *priv;
+	struct net_device *ndev;
+	int error, irq, q;
+	struct resource *res;
+	int i;
+
+	if (!np) {
+		dev_err(&pdev->dev,
+			"this driver is required to be instantiated from device tree\n");
+		return -EINVAL;
+	}
+
+	rstc = devm_reset_control_get_optional_exclusive(&pdev->dev, NULL);
+	if (IS_ERR(rstc))
+		return dev_err_probe(&pdev->dev, PTR_ERR(rstc),
+				     "failed to get cpg reset\n");
+
+	ndev = alloc_etherdev_mqs(sizeof(struct ravb_private),
+				  NUM_TX_QUEUE, NUM_RX_QUEUE);
+	if (!ndev)
+		return -ENOMEM;
+
+	info = of_device_get_match_data(&pdev->dev);
+
+	ndev->features = info->net_features;
+	ndev->hw_features = info->net_hw_features;
+
+	error = reset_control_deassert(rstc);
+	if (error)
+		goto out_free_netdev;
+
+	pm_runtime_enable(&pdev->dev);
+	error = pm_runtime_resume_and_get(&pdev->dev);
+	if (error < 0)
+		goto out_rpm_disable;
+
+	if (info->multi_irqs) {
+		if (info->err_mgmt_irqs)
+			irq = platform_get_irq_byname(pdev, "dia");
+		else
+			irq = platform_get_irq_byname(pdev, "ch22");
+	} else {
+		irq = platform_get_irq(pdev, 0);
+	}
+	if (irq < 0) {
+		error = irq;
+		goto out_release;
+	}
+	ndev->irq = irq;
+
+	SET_NETDEV_DEV(ndev, &pdev->dev);
+
+	priv = netdev_priv(ndev);
+	priv->info = info;
+	priv->rstc = rstc;
+	priv->ndev = ndev;
+	priv->pdev = pdev;
+	priv->num_tx_ring[RAVB_BE] = BE_TX_RING_SIZE;
+	priv->num_rx_ring[RAVB_BE] = BE_RX_RING_SIZE;
+	if (info->nc_queues) {
+		priv->num_tx_ring[RAVB_NC] = NC_TX_RING_SIZE;
+		priv->num_rx_ring[RAVB_NC] = NC_RX_RING_SIZE;
+	}
+
+	priv->addr = devm_platform_get_and_ioremap_resource(pdev, 0, &res);
+	if (IS_ERR(priv->addr)) {
+		error = PTR_ERR(priv->addr);
+		goto out_release;
+	}
+
+	/* The Ether-specific entries in the device structure. */
+	ndev->base_addr = res->start;
+
+	spin_lock_init(&priv->lock);
+	INIT_WORK(&priv->work, ravb_tx_timeout_work);
+
+	error = of_get_phy_mode(np, &priv->phy_interface);
+	if (error && error != -ENODEV)
+		goto out_release;
+
+	priv->no_avb_link = of_property_read_bool(np, "renesas,no-ether-link");
+	priv->avb_link_active_low =
+		of_property_read_bool(np, "renesas,ether-link-active-low");
+
+	if (info->multi_irqs) {
+		if (info->err_mgmt_irqs)
+			irq = platform_get_irq_byname(pdev, "line3");
+		else
+			irq = platform_get_irq_byname(pdev, "ch24");
+		if (irq < 0) {
+			error = irq;
+			goto out_release;
+		}
+		priv->emac_irq = irq;
+		for (i = 0; i < NUM_RX_QUEUE; i++) {
+			irq = platform_get_irq_byname(pdev, ravb_rx_irqs[i]);
+			if (irq < 0) {
+				error = irq;
+				goto out_release;
+			}
+			priv->rx_irqs[i] = irq;
+		}
+		for (i = 0; i < NUM_TX_QUEUE; i++) {
+			irq = platform_get_irq_byname(pdev, ravb_tx_irqs[i]);
+			if (irq < 0) {
+				error = irq;
+				goto out_release;
+			}
+			priv->tx_irqs[i] = irq;
+		}
+
+		if (info->err_mgmt_irqs) {
+			irq = platform_get_irq_byname(pdev, "err_a");
+			if (irq < 0) {
+				error = irq;
+				goto out_release;
+			}
+			priv->erra_irq = irq;
+
+			irq = platform_get_irq_byname(pdev, "mgmt_a");
+			if (irq < 0) {
+				error = irq;
+				goto out_release;
+			}
+			priv->mgmta_irq = irq;
+		}
+	}
+
+	priv->clk = devm_clk_get(&pdev->dev, NULL);
+	if (IS_ERR(priv->clk)) {
+		error = PTR_ERR(priv->clk);
+		goto out_release;
+	}
+
+	priv->refclk = devm_clk_get_optional(&pdev->dev, "refclk");
+	if (IS_ERR(priv->refclk)) {
+		error = PTR_ERR(priv->refclk);
+		goto out_release;
+	}
+	clk_prepare_enable(priv->refclk);
+
+	if (info->gptp_ref_clk) {
+		priv->gptp_clk = devm_clk_get(&pdev->dev, "gptp");
+		if (IS_ERR(priv->gptp_clk)) {
+			error = PTR_ERR(priv->gptp_clk);
+			goto out_disable_refclk;
+		}
+		clk_prepare_enable(priv->gptp_clk);
+	}
+
+	ndev->max_mtu = info->rx_max_buf_size - (ETH_HLEN + VLAN_HLEN + ETH_FCS_LEN);
+	ndev->min_mtu = ETH_MIN_MTU;
+
+	/* FIXME: R-Car Gen2 has 4byte alignment restriction for tx buffer
+	 * Use two descriptor to handle such situation. First descriptor to
+	 * handle aligned data buffer and second descriptor to handle the
+	 * overflow data because of alignment.
+	 */
+	priv->num_tx_desc = info->aligned_tx ? 2 : 1;
+
+	/* Set function */
+	ndev->netdev_ops = &ravb_netdev_ops;
+	ndev->ethtool_ops = &ravb_ethtool_ops;
+
+	/* Set AVB config mode */
+	error = ravb_set_config_mode(ndev);
+	if (error)
+		goto out_disable_gptp_clk;
+
+	if (info->gptp || info->ccc_gac) {
+		/* Set GTI value */
+		error = ravb_set_gti(ndev);
+		if (error)
+			goto out_disable_gptp_clk;
+
+		/* Request GTI loading */
+		ravb_modify(ndev, GCCR, GCCR_LTI, GCCR_LTI);
+	}
+
+	if (info->internal_delay) {
+		ravb_parse_delay_mode(np, ndev);
+		ravb_set_delay_mode(ndev);
+	}
+
+	/* Allocate descriptor base address table */
+	priv->desc_bat_size = sizeof(struct ravb_desc) * DBAT_ENTRY_NUM;
+	priv->desc_bat = dma_alloc_coherent(ndev->dev.parent, priv->desc_bat_size,
+					    &priv->desc_bat_dma, GFP_KERNEL);
+	if (!priv->desc_bat) {
+		dev_err(&pdev->dev,
+			"Cannot allocate desc base address table (size %d bytes)\n",
+			priv->desc_bat_size);
+		error = -ENOMEM;
+		goto out_disable_gptp_clk;
+	}
+	for (q = RAVB_BE; q < DBAT_ENTRY_NUM; q++)
+		priv->desc_bat[q].die_dt = DT_EOS;
+	ravb_write(ndev, priv->desc_bat_dma, DBAT);
+
+	/* Initialise HW timestamp list */
+	INIT_LIST_HEAD(&priv->ts_skb_list);
+
+	/* Initialise PTP Clock driver */
+	if (info->ccc_gac)
+		ravb_ptp_init(ndev, pdev);
+
+	/* Debug message level */
+	priv->msg_enable = RAVB_DEF_MSG_ENABLE;
+
+	/* Read and set MAC address */
+	ravb_read_mac_address(np, ndev);
+	if (!is_valid_ether_addr(ndev->dev_addr)) {
+		dev_warn(&pdev->dev,
+			 "no valid MAC address supplied, using a random one\n");
+		eth_hw_addr_random(ndev);
+	}
+
+	/* MDIO bus init */
+	error = ravb_mdio_init(priv);
+	if (error) {
+		dev_err(&pdev->dev, "failed to initialize MDIO\n");
+		goto out_dma_free;
+	}
+
+	netif_napi_add(ndev, &priv->napi[RAVB_BE], ravb_poll);
+	if (info->nc_queues)
+		netif_napi_add(ndev, &priv->napi[RAVB_NC], ravb_poll);
+
+	/* Network device register */
+	error = register_netdev(ndev);
+	if (error)
+		goto out_napi_del;
+
+	device_set_wakeup_capable(&pdev->dev, 1);
+
+	/* Print device information */
+	netdev_info(ndev, "Base address at %#x, %pM, IRQ %d.\n",
+		    (u32)ndev->base_addr, ndev->dev_addr, ndev->irq);
+
+	platform_set_drvdata(pdev, ndev);
+
+	return 0;
+
+out_napi_del:
+	if (info->nc_queues)
+		netif_napi_del(&priv->napi[RAVB_NC]);
+
+	netif_napi_del(&priv->napi[RAVB_BE]);
+	ravb_mdio_release(priv);
+out_dma_free:
+	dma_free_coherent(ndev->dev.parent, priv->desc_bat_size, priv->desc_bat,
+			  priv->desc_bat_dma);
+
+	/* Stop PTP Clock driver */
+	if (info->ccc_gac)
+		ravb_ptp_stop(ndev);
+out_disable_gptp_clk:
+	clk_disable_unprepare(priv->gptp_clk);
+out_disable_refclk:
+	clk_disable_unprepare(priv->refclk);
+out_release:
+	pm_runtime_put(&pdev->dev);
+out_rpm_disable:
+	pm_runtime_disable(&pdev->dev);
+	reset_control_assert(rstc);
+out_free_netdev:
+	free_netdev(ndev);
+	return error;
+}
+
+static int ravb_remove(struct platform_device *pdev)
+{
+	struct net_device *ndev = platform_get_drvdata(pdev);
+	struct ravb_private *priv = netdev_priv(ndev);
+	const struct ravb_hw_info *info = priv->info;
+
+	unregister_netdev(ndev);
+	if (info->nc_queues)
+		netif_napi_del(&priv->napi[RAVB_NC]);
+	netif_napi_del(&priv->napi[RAVB_BE]);
+
+	ravb_mdio_release(priv);
+
+	/* Stop PTP Clock driver */
+	if (info->ccc_gac)
+		ravb_ptp_stop(ndev);
+
+	dma_free_coherent(ndev->dev.parent, priv->desc_bat_size, priv->desc_bat,
+			  priv->desc_bat_dma);
+
+	ravb_set_opmode(ndev, CCC_OPC_RESET);
+
+	clk_disable_unprepare(priv->gptp_clk);
+	clk_disable_unprepare(priv->refclk);
+
+	pm_runtime_put_sync(&pdev->dev);
+	pm_runtime_disable(&pdev->dev);
+	reset_control_assert(priv->rstc);
+	free_netdev(ndev);
+	platform_set_drvdata(pdev, NULL);
+
+	return 0;
+}
+
+static int ravb_wol_setup(struct net_device *ndev)
+{
+	struct ravb_private *priv = netdev_priv(ndev);
+	const struct ravb_hw_info *info = priv->info;
+
+	/* Disable interrupts by clearing the interrupt masks. */
+	ravb_write(ndev, 0, RIC0);
+	ravb_write(ndev, 0, RIC2);
+	ravb_write(ndev, 0, TIC);
+
+	/* Only allow ECI interrupts */
+	synchronize_irq(priv->emac_irq);
+	if (info->nc_queues)
+		napi_disable(&priv->napi[RAVB_NC]);
+	napi_disable(&priv->napi[RAVB_BE]);
+	ravb_write(ndev, ECSIPR_MPDIP, ECSIPR);
+
+	/* Enable MagicPacket */
+	ravb_modify(ndev, ECMR, ECMR_MPDE, ECMR_MPDE);
+
+	return enable_irq_wake(priv->emac_irq);
+}
+
+static int ravb_wol_restore(struct net_device *ndev)
+{
+	struct ravb_private *priv = netdev_priv(ndev);
+	const struct ravb_hw_info *info = priv->info;
+
+	if (info->nc_queues)
+		napi_enable(&priv->napi[RAVB_NC]);
+	napi_enable(&priv->napi[RAVB_BE]);
+
+	/* Disable MagicPacket */
+	ravb_modify(ndev, ECMR, ECMR_MPDE, 0);
+
+	ravb_close(ndev);
+
+	return disable_irq_wake(priv->emac_irq);
+}
+
+static int __maybe_unused ravb_suspend(struct device *dev)
+{
+	struct net_device *ndev = dev_get_drvdata(dev);
+	struct ravb_private *priv = netdev_priv(ndev);
+	int ret;
+
+	if (!netif_running(ndev))
+		return 0;
+
+	netif_device_detach(ndev);
+
+	if (priv->wol_enabled)
+		ret = ravb_wol_setup(ndev);
+	else
+		ret = ravb_close(ndev);
+
+	if (priv->info->ccc_gac)
+		ravb_ptp_stop(ndev);
+
+	return ret;
+}
+
+static int __maybe_unused ravb_resume(struct device *dev)
+{
+	struct net_device *ndev = dev_get_drvdata(dev);
+	struct ravb_private *priv = netdev_priv(ndev);
+	const struct ravb_hw_info *info = priv->info;
+	int ret = 0;
+
+	/* If WoL is enabled set reset mode to rearm the WoL logic */
+	if (priv->wol_enabled) {
+		ret = ravb_set_opmode(ndev, CCC_OPC_RESET);
+		if (ret)
+			return ret;
+	}
+
+	/* All register have been reset to default values.
+	 * Restore all registers which where setup at probe time and
+	 * reopen device if it was running before system suspended.
+	 */
+
+	/* Set AVB config mode */
+	ret = ravb_set_config_mode(ndev);
+	if (ret)
+		return ret;
+
+	if (info->gptp || info->ccc_gac) {
+		/* Set GTI value */
+		ret = ravb_set_gti(ndev);
+		if (ret)
+			return ret;
+
+		/* Request GTI loading */
+		ravb_modify(ndev, GCCR, GCCR_LTI, GCCR_LTI);
+	}
+
+	if (info->internal_delay)
+		ravb_set_delay_mode(ndev);
+
+	/* Restore descriptor base address table */
+	ravb_write(ndev, priv->desc_bat_dma, DBAT);
+
+	if (priv->info->ccc_gac)
+		ravb_ptp_init(ndev, priv->pdev);
+
+	if (netif_running(ndev)) {
+		if (priv->wol_enabled) {
+			ret = ravb_wol_restore(ndev);
+			if (ret)
+				return ret;
+		}
+		ret = ravb_open(ndev);
+		if (ret < 0)
+			return ret;
+		ravb_set_rx_mode(ndev);
+		netif_device_attach(ndev);
+	}
+
+	return ret;
+}
+
+static int __maybe_unused ravb_runtime_nop(struct device *dev)
+{
+	/* Runtime PM callback shared between ->runtime_suspend()
+	 * and ->runtime_resume(). Simply returns success.
+	 *
+	 * This driver re-initializes all registers after
+	 * pm_runtime_get_sync() anyway so there is no need
+	 * to save and restore registers here.
+	 */
+	return 0;
+}
+
+static const struct dev_pm_ops ravb_dev_pm_ops = {
+	SET_SYSTEM_SLEEP_PM_OPS(ravb_suspend, ravb_resume)
+	SET_RUNTIME_PM_OPS(ravb_runtime_nop, ravb_runtime_nop, NULL)
+};
+
+static struct platform_driver ravb_driver = {
+	.probe		= ravb_probe,
+	.remove		= ravb_remove,
+	.driver = {
+		.name	= "ravb",
+		.pm	= &ravb_dev_pm_ops,
+		.of_match_table = ravb_match_table,
+	},
+};
+
+module_platform_driver(ravb_driver);
+
+MODULE_AUTHOR("Mitsuhiro Kimura, Masaru Nagai");
+MODULE_DESCRIPTION("Renesas Ethernet AVB driver");
+MODULE_LICENSE("GPL v2");