Subject: [PATCH v5 1/2] Renesas Ethernet AVB driver proper

From: Sergei Shtylyov <[email-masked]>
Date: Tue, 02 Jun 2015 23:44:10 +0300

Ethernet AVB includes an Gigabit Ethernet controller (E-MAC) that is basically
compatible with SuperH Gigabit Ethernet E-MAC.  Ethernet AVB has  a  dedicated
direct memory access controller (AVB-DMAC) that is a new design compared to the
SuperH E-DMAC. The AVB-DMAC is compliant with 3 standards formulated for IEEE
802.1BA: IEEE 802.1AS timing and synchronization protocol, IEEE 802.1Qav real-
time transfer, and the IEEE 802.1Qat stream reservation protocol.

The  driver only supports device tree probing, so the binding document is
included in this patch.

Based on the original patches by Mitsuhiro Kimura.

Signed-off-by: Mitsuhiro Kimura <[email-masked]>
Signed-off-by: Sergei Shtylyov <[email-masked]>

---
This patch is against David Miller's 'net-next.git' repo.

Changes in version 5:
- switched to calling multiqueue APIs, implementing ndo_select_queue() method;
- fixed the ring-full check in ravb_start_xmit() and turned it into a "sanity
  check", adjusting the error message and promoting dev_warn() to dev_err();
- fixed skb_put_padto() failure path to drop the packet;
- moved the 'priv->cur_tx' increment after enqueuing the packet in
  ravb_start_xmit();
- added the ring-full check after the packet gets enqueued in ravb_start_xmit(),
  moved ravb_tx_free() call from the sanity check to this new code; 
- moved mmiowb() call after the 'exit' label in ravb_start_xmit();
- removed superfluous netif_tx_disable() call from ravb_set_ringparam().

Changes in version 4:
- switched from the bit fields in the descriptor structures to normal fields
  and masks;
- declared 16/32-bit descriptor fields as '__le{16/32}' and started using
  cpu_to_le{16|32}() and le{16|32}_to_cpu() when accessing them;
- started registering/deregistering the PTP driver each time the AVB-DMAC
  enters/leaves  the operation mode instead of navb_{probe|remove}(), and thus
  removed ravb_ptp_is_config() and also the checks in ravb_ptp_tcr_request(),
  ravb_ptp_time_write(), and ravb_ptp_update_addend();
- folded ravb_free_dma_buffer() into ravb_ring_free(), clarified the comment to
  the latter function; was then able to simplify the error cleanup path in
  ravb_ring_init();
- fixed totally brain damaged ravb_tx_timeout() by first stopping DMA and then
  calling ravb_ring_free() and moving most of the code into work-queue function,
- started calling ravb_ring_init() from ravb_dmac_init();
- started allocating the TX buffers with GPF_KERNEL instead of GPF_ATOMIC;
- started checking the result of ravb_wait() where it was previously ignored;
- propagated errors from ravb_wait() calls outside ravb_ptp_tcr_request();
- propagated errors from ravb_ptp_tcr_request() calls outside
  ravb_ptp_time_{read|write}();
- propagated errors from ravb_ptp_time_{read|write}() outside
  ravb_ptp_adjtime() and ravb_ptp_{get|set}time64();
- switched from using ravb_wait() after setting a bit in the GCCR register to
  just checking if a bit is zero before setting it in ravb_ptp_time_write(),
  ravb_ptp_select_counter(), and ravb_ptp_update_addend();
- added check for ravb_ptp_update_compare() failure to ravb_ptp_perout() and
  propagate the error outside this function;
- added mmiowb() calls before releasing the spinlock;
- merged the spinlock release code from different *if* statement branches in
  ravb_ptp_ptp_perout();
- fixed the 'reg' parameter type in ravb_wait();
- fixed the result type for ravb_start_xmit();
- fixed the 'request' parameter type in ravb_ptp_tcr_request();
- added the 'size' local variable in ravb_tx_free();
- fixed TX ring cleanup threshold in ravb_start_xmit();
- fixed kmalloc() error cleanup in ravb_start_xmit();
- fixed ravb_start_xmit() racing with the interrupt handler and NAPI poller by
  holding spinlock till the end of ravb_start_xmit();
- factored out the GIC interrupt handling into ravb_ptp_interrupt();
- added the 'dma_addr' local variable in ravb_start_xmit();
- switched from '%=' operator to '&=' in ravb_start_xmit();
- changed the format specifier in ravb_tx_timeout();
- removed useless type cast from ravb_rx();
- acquired the spinlock earlier in ravb_poll();
- made ravb_ptp_init() return *void* since its result isn't checked anyway;
- removed 'ravb_private::rx_buffer_size' since the RX buffer size should be
  constant;
- removed unused 'ravb_private::edmac_endian';
- expanded update_mac_address() inline at its only call site;
- expanded ravb_ptp_cnt_{read|write}() inline at their single call sites;
- expanded ravb_ptp_cnt_select_counter() inline at its only call site;
- expanded ravb_ptp_update_addend() at its only call site;
- added 'ravb_' prefix to read_mac_address();
- renamed ravb_wait_stop_dma() to ravb_stop_dma();
- also disabled E-MAC TX in ravb_stop_dma() by calling ravb_rcv_snd_disable();
- moved the ravb_config() call from ravb_stop_dma() callers to this function;
- removed redundant register reads/writes in ravb_set_duplex();
- converted the 'new_state' local variable from *int* to *bool* in
  ravb_adjust_link();
- converted the 'neg_adj' local variable from *int* to *bool* in
  ravb_ptp_adjfreq();
- removed duplicate 'ndev->netdev_ops' assignment in ravb_probe();
- removed redundant clearing of the statisitics counters in ravb_probe();
- removed useless 'priv->num_[rt]x_ring[RAVB_NC]' assignments in
  ravb_set_ringparam();
- removed the 'adj' local variable in ravb_ptp_adjfreq();
- started printing the error value after ravb_dmac_init() call failure in
  ravb_set_ringparam();
- removed unused #define NC_[RT]X_RING_{MIN|MAX};
- removed unused #define TX_TIMEOUT;
- moved #define RAVB_ALIGN and timestamp flag #define's after the registers
  *enum* declaration;
- moved 'struct ravb_desc' before the descriptor type *enum* declaration;
- moved 'enum RAVB_QUEUE' before the group of #define's that preceded it;
- split the header file from the driver, split the PTP driver into its own file
  and a separate patch, adjusted the changelog accordingly;
- converted ravb_wait() from *static* to *extern* for use by the PTP driver;
- converted ravb_ptp_{init|stop}() from *static* to *extern* tor call it from
  the Ethernet driver proper;
- fixed "transmited" in the comments thoughout;
- added "the" to the "caller must hold lock" comments thoughout;
- created the Renesas submenu in the Kconfig file.

Changes in version 3:
- fixed errors due to the PTP core having switched to using 'struct timespec64'
  to get/set time, renaming ravb_ptp_{get|set}time();
- fixed type cast warning in ravb_set_buffer_align();
- removed memory allocation failure message from ravb_start_xmit();
- added 'irq' local variable in ravb_probe();
- rephrased error messages in ravb_config() and ravb_close();
- lowercased the first letter of the driver messages throughout;
- renamed the 'result' local variables to 'error' throughout.

Changes in version 2:
- fixed the bug where interrupts weren't re-enabled in ravb_set_ringparam();
- added netif_device_{detach|attach}() calls to ravb_set_ringparam(), fixing
  TX watchdog being fired during ring resize;
- made ravb_ring_{init|free}(), ravb_free_dma_buffer(), and ravb_[ed]mac_init()
  calls conditional fixing crash/memory  leak when resizing rings of  a closed
  device;
- fixed the order of setting SKBTX_IN_PROGRESS and skb_tx_timestamp() calls;
- implemented ndo_set_rx_mode() method;
- implemented SIOCGHWTSTAMP ioctl(), turning *if* statement in ravb_do_ioctl()
  into *switch*;
- merged ravb_wait_clear() and ravb_wait_setting() into ravb_wait(), switching
  to 100 times more frequent polling and simplfying the code;
- replaced unbounded register polling loops with ravb_wait() calls;
- switched to using 'struct timespec64' instead of 'struct timespec' whenever
  possible, adding code to read/write extra PTP registers;
- added dma_[rw]mb() barrier calls where needed (with comments);
- renamed ravb_reset() to ravb_config(), fixed the comment grammar there;
- renamed ravb_mac_init() to ravb_emac_init(), removing now unneeded parameter,
  renamed local variable there,  simplified the expression assigned to that
  variable;
- removed now unneeded parameter from ravb_dmac_init() along with the code
  disabling interrupts, moved netif_start_queue() from this function to its
  callers;
- renamed ravb_hwtstamp_ioctl() to ravb_hwtstamp_set(), renaming the 2nd
  parameter, removing unused 3rd parameter, and turning the initializer for
  one of the local variables into assignment;
- removed unused parameter from ravb_rx();
- renamed variables in ravb_get_tx_tstamp() and ravb_close();
- changed the "compatible" property values;
- removed unneeded parens and netif_queue_stopped() call in ravb_poll(), fixed
  the comment there;
- simplified ravb_ptp_is_config();
- realigned some lines/names/operators throughout;
- sorted the variable declarations by length descending thoughout;
- capitalize the first letter in the comments thoughout;
- added Masaru Nagai to MODULE_AUTHOR();
- mentioned the PTP driver in the changelog;
- added original authors' sign-offs.

 Documentation/devicetree/bindings/net/renesas,ravb.txt |   48 
 drivers/net/ethernet/renesas/Kconfig                   |   31 
 drivers/net/ethernet/renesas/Makefile                  |    1 
 drivers/net/ethernet/renesas/ravb.c                    | 1816 +++++++++++++++++
 drivers/net/ethernet/renesas/ravb.h                    |  806 +++++++
 5 files changed, 2702 insertions(+)

Index: net-next/Documentation/devicetree/bindings/net/renesas,ravb.txt
===================================================================
--- /dev/null
+++ net-next/Documentation/devicetree/bindings/net/renesas,ravb.txt
@@ -0,0 +1,48 @@
+* Renesas Electronics Ethernet AVB
+
+This file provides information on what the device node for the Ethernet AVB
+interface contains.
+
+Required properties:
+- compatible: "renesas,etheravb-r8a7790" if the device is a part of R8A7790 SoC.
+	      "renesas,etheravb-r8a7794" if the device is a part of R8A7794 SoC.
+- reg: offset and length of (1) the register block and (2) the stream buffer.
+- interrupts: interrupt specifier for the sole interrupt.
+- phy-mode: see ethernet.txt file in the same directory.
+- phy-handle: see ethernet.txt file in the same directory.
+- #address-cells: number of address cells for the MDIO bus, must be equal to 1.
+- #size-cells: number of size cells on the MDIO bus, must be equal to 0.
+- clocks: clock phandle and specifier pair.
+- pinctrl-0: phandle, referring to a default pin configuration node.
+
+Optional properties:
+- interrupt-parent: the phandle for the interrupt controller that services
+		    interrupts for this device.
+- pinctrl-names: pin configuration state name ("default").
+- renesas,no-ether-link: boolean, specify when a board does not provide a proper
+			 AVB_LINK signal.
+- renesas,ether-link-active-low: boolean, specify when the AVB_LINK signal is
+				 active-low instead of normal active-high.
+
+Example:
+
+	ethernet@e6800000 {
+		compatible = "renesas,etheravb-r8a7790";
+		reg = <0 0xe6800000 0 0x800>, <0 0xee0e8000 0 0x4000>;
+		interrupt-parent = <&gic>;
+		interrupts = <0 163 IRQ_TYPE_LEVEL_HIGH>;
+		clocks = <&mstp8_clks R8A7790_CLK_ETHERAVB>;
+		phy-mode = "rmii";
+		phy-handle = <&phy0>;
+		pinctrl-0 = <&ether_pins>;
+		pinctrl-names = "default";
+		renesas,no-ether-link;
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		phy0: ethernet-phy@0 {
+			reg = <0>;
+			interrupt-parent = <&gpio2>;
+			interrupts = <15 IRQ_TYPE_LEVEL_LOW>;
+		};
+	};
Index: net-next/drivers/net/ethernet/renesas/Kconfig
===================================================================
--- net-next.orig/drivers/net/ethernet/renesas/Kconfig
+++ net-next/drivers/net/ethernet/renesas/Kconfig
@@ -2,6 +2,21 @@
 # Renesas device configuration
 #
 
+config NET_VENDOR_RENESAS
+	bool "Renesas devices"
+	default y
+	---help---
+	  If you have a network (Ethernet) card belonging to this class, say Y
+	  and read the Ethernet-HOWTO, available from
+	  <http://www.tldp.org/docs.html#howto>.
+
+	  Note that the answer to this question doesn't directly affect the
+	  kernel: saying N will just cause the configurator to skip all
+	  the questions about Renesas devices. If you say Y, you will be asked
+	  for your specific device in the following questions.
+
+if NET_VENDOR_RENESAS
+
 config SH_ETH
 	tristate "Renesas SuperH Ethernet support"
 	depends on HAS_DMA
@@ -15,3 +30,19 @@ config SH_ETH
 	  This driver supporting CPUs are:
 		- SH7619, SH7710, SH7712, SH7724, SH7734, SH7763, SH7757,
 		  R8A7740, R8A777x and R8A779x.
+
+config RAVB
+	tristate "Renesas Ethernet AVB support"
+	depends on HAS_DMA
+	depends on ARCH_SHMOBILE || COMPILE_TEST
+	select CRC32
+	select MII
+	select MDIO_BITBANG
+	select PHYLIB
+	select PTP_1588_CLOCK
+	help
+	  Renesas Ethernet AVB device driver.
+	  This driver supports the following SoCs:
+		- R8A779x.
+
+endif # NET_VENDOR_RENESAS
Index: net-next/drivers/net/ethernet/renesas/Makefile
===================================================================
--- net-next.orig/drivers/net/ethernet/renesas/Makefile
+++ net-next/drivers/net/ethernet/renesas/Makefile
@@ -3,3 +3,4 @@
 #
 
 obj-$(CONFIG_SH_ETH) += sh_eth.o
+obj-$(CONFIG_RAVB) += ravb.o
Index: net-next/drivers/net/ethernet/renesas/ravb.c
===================================================================
--- /dev/null
+++ net-next/drivers/net/ethernet/renesas/ravb.c
@@ -0,0 +1,1816 @@
+/* Renesas Ethernet AVB device driver
+ *
+ * Copyright (C) 2014-2015 Renesas Electronics Corporation
+ * Copyright (C) 2015 Renesas Solutions Corp.
+ * Copyright (C) 2015 Cogent Embedded, Inc. <[email-masked]>
+ *
+ * Based on the SuperH Ethernet driver
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License version 2,
+ * as published by the Free Software Foundation.
+ */
+
+#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/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+
+#include "ravb.h"
+
+#define RAVB_DEF_MSG_ENABLE \
+		(NETIF_MSG_LINK	  | \
+		 NETIF_MSG_TIMER  | \
+		 NETIF_MSG_RX_ERR | \
+		 NETIF_MSG_TX_ERR)
+
+static 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_config(struct net_device *ndev)
+{
+	int error;
+
+	/* Set config mode */
+	ravb_write(ndev, (ravb_read(ndev, CCC) & ~CCC_OPC) | CCC_OPC_CONFIG,
+		   CCC);
+	/* Check if the operating mode is changed to the config mode */
+	error = ravb_wait(ndev, CSR, CSR_OPS, CSR_OPS_CONFIG);
+	if (error)
+		netdev_err(ndev, "failed to switch device to config mode\n");
+
+	return error;
+}
+
+static void ravb_set_duplex(struct net_device *ndev)
+{
+	struct ravb_private *priv = netdev_priv(ndev);
+	u32 ecmr = ravb_read(ndev, ECMR);
+
+	if (priv->duplex)	/* Full */
+		ecmr |=  ECMR_DM;
+	else			/* Half */
+		ecmr &= ~ECMR_DM;
+	ravb_write(ndev, ecmr, ECMR);
+}
+
+static void ravb_set_rate(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;
+	default:
+		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 net_device *ndev, const u8 *mac)
+{
+	if (mac) {
+		ether_addr_copy(ndev->dev_addr, mac);
+	} else {
+		ndev->dev_addr[0] = (ravb_read(ndev, MAHR) >> 24);
+		ndev->dev_addr[1] = (ravb_read(ndev, MAHR) >> 16) & 0xFF;
+		ndev->dev_addr[2] = (ravb_read(ndev, MAHR) >> 8) & 0xFF;
+		ndev->dev_addr[3] = (ravb_read(ndev, MAHR) >> 0) & 0xFF;
+		ndev->dev_addr[4] = (ravb_read(ndev, MALR) >> 8) & 0xFF;
+		ndev->dev_addr[5] = (ravb_read(ndev, MALR) >> 0) & 0xFF;
+	}
+}
+
+static void ravb_mdio_ctrl(struct mdiobb_ctrl *ctrl, u32 mask, int set)
+{
+	struct ravb_private *priv = container_of(ctrl, struct ravb_private,
+						 mdiobb);
+	u32 pir = ravb_read(priv->ndev, PIR);
+
+	if (set)
+		pir |=  mask;
+	else
+		pir &= ~mask;
+	ravb_write(priv->ndev, pir, PIR);
+}
+
+/* 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 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 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);
+	int ring_size;
+	int i;
+
+	/* 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 TX skb ringbuffer */
+	if (priv->tx_skb[q]) {
+		for (i = 0; i < priv->num_tx_ring[q]; i++)
+			dev_kfree_skb(priv->tx_skb[q][i]);
+	}
+	kfree(priv->tx_skb[q]);
+	priv->tx_skb[q] = NULL;
+
+	/* Free aligned TX buffers */
+	if (priv->tx_buffers[q]) {
+		for (i = 0; i < priv->num_tx_ring[q]; i++)
+			kfree(priv->tx_buffers[q][i]);
+	}
+	kfree(priv->tx_buffers[q]);
+	priv->tx_buffers[q] = NULL;
+
+	if (priv->rx_ring[q]) {
+		ring_size = sizeof(struct ravb_ex_rx_desc) *
+			    (priv->num_rx_ring[q] + 1);
+		dma_free_coherent(NULL, ring_size, priv->rx_ring[q],
+				  priv->rx_desc_dma[q]);
+		priv->rx_ring[q] = NULL;
+	}
+
+	if (priv->tx_ring[q]) {
+		ring_size = sizeof(struct ravb_tx_desc) *
+			    (priv->num_tx_ring[q] + 1);
+		dma_free_coherent(NULL, ring_size, priv->tx_ring[q],
+				  priv->tx_desc_dma[q]);
+		priv->tx_ring[q] = NULL;
+	}
+}
+
+/* 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);
+	struct ravb_ex_rx_desc *rx_desc = NULL;
+	struct ravb_tx_desc *tx_desc = NULL;
+	struct ravb_desc *desc = NULL;
+	int rx_ring_size = sizeof(*rx_desc) * priv->num_rx_ring[q];
+	int tx_ring_size = sizeof(*tx_desc) * priv->num_tx_ring[q];
+	struct sk_buff *skb;
+	dma_addr_t dma_addr;
+	void *buffer;
+	int i;
+
+	priv->cur_rx[q] = 0;
+	priv->cur_tx[q] = 0;
+	priv->dirty_rx[q] = 0;
+	priv->dirty_tx[q] = 0;
+
+	memset(priv->rx_ring[q], 0, rx_ring_size);
+	/* Build RX ring buffer */
+	for (i = 0; i < priv->num_rx_ring[q]; i++) {
+		priv->rx_skb[q][i] = NULL;
+		skb = netdev_alloc_skb(ndev, PKT_BUF_SZ + RAVB_ALIGN - 1);
+		if (!skb)
+			break;
+		ravb_set_buffer_align(skb);
+		/* RX descriptor */
+		rx_desc = &priv->rx_ring[q][i];
+		/* The size of the buffer should be on 16-byte boundary. */
+		rx_desc->ds_cc = cpu_to_le16(ALIGN(PKT_BUF_SZ, 16));
+		dma_addr = dma_map_single(&ndev->dev, skb->data,
+					  ALIGN(PKT_BUF_SZ, 16),
+					  DMA_FROM_DEVICE);
+		if (dma_mapping_error(&ndev->dev, dma_addr)) {
+			dev_kfree_skb(skb);
+			break;
+		}
+		priv->rx_skb[q][i] = skb;
+		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 */
+	priv->dirty_rx[q] = (u32)(i - priv->num_rx_ring[q]);
+
+	memset(priv->tx_ring[q], 0, tx_ring_size);
+	/* Build TX ring buffer */
+	for (i = 0; i < priv->num_tx_ring[q]; i++) {
+		priv->tx_skb[q][i] = NULL;
+		priv->tx_buffers[q][i] = NULL;
+		buffer = kmalloc(PKT_BUF_SZ + RAVB_ALIGN - 1, GFP_KERNEL);
+		if (!buffer)
+			break;
+		/* Aligned TX buffer */
+		priv->tx_buffers[q][i] = buffer;
+		tx_desc = &priv->tx_ring[q][i];
+		tx_desc->die_dt = DT_EEMPTY;
+	}
+	tx_desc = &priv->tx_ring[q][i];
+	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]);
+}
+
+/* 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);
+	int ring_size;
+
+	/* 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;
+
+	/* Allocate rings for the aligned buffers */
+	priv->tx_buffers[q] = kcalloc(priv->num_tx_ring[q],
+				      sizeof(*priv->tx_buffers[q]), GFP_KERNEL);
+	if (!priv->tx_buffers[q])
+		goto error;
+
+	/* Allocate all RX descriptors. */
+	ring_size = sizeof(struct ravb_ex_rx_desc) * (priv->num_rx_ring[q] + 1);
+	priv->rx_ring[q] = dma_alloc_coherent(NULL, ring_size,
+					      &priv->rx_desc_dma[q],
+					      GFP_KERNEL);
+	if (!priv->rx_ring[q])
+		goto error;
+
+	priv->dirty_rx[q] = 0;
+
+	/* Allocate all TX descriptors. */
+	ring_size = sizeof(struct ravb_tx_desc) * (priv->num_tx_ring[q] + 1);
+	priv->tx_ring[q] = dma_alloc_coherent(NULL, 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;
+}
+
+/* E-MAC init function */
+static void ravb_emac_init(struct net_device *ndev)
+{
+	struct ravb_private *priv = netdev_priv(ndev);
+	u32 ecmr;
+
+	/* Receive frame limit set register */
+	ravb_write(ndev, ndev->mtu + ETH_HLEN + VLAN_HLEN + ETH_FCS_LEN, RFLR);
+
+	/* PAUSE prohibition */
+	ecmr =  ravb_read(ndev, ECMR);
+	ecmr &= ECMR_DM;
+	ecmr |= ECMR_ZPF | (priv->duplex ? ECMR_DM : 0) | ECMR_TE | ECMR_RE;
+	ravb_write(ndev, ecmr, ECMR);
+
+	ravb_set_rate(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);
+
+	ravb_write(ndev, 1, MPR);
+
+	/* 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);
+}
+
+/* Device init function for Ethernet AVB */
+static int ravb_dmac_init(struct net_device *ndev)
+{
+	int error;
+
+	/* Set CONFIG mode */
+	error = ravb_config(ndev);
+	if (error)
+		return 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);
+
+#if defined(__LITTLE_ENDIAN)
+	ravb_write(ndev, ravb_read(ndev, CCC) & ~CCC_BOC, CCC);
+#else
+	ravb_write(ndev, ravb_read(ndev, CCC) | CCC_BOC, CCC);
+#endif
+
+	/* Set AVB RX */
+	ravb_write(ndev, RCR_EFFS | RCR_ENCF | RCR_ETS0 | 0x18000000, RCR);
+
+	/* Set FIFO size */
+	ravb_write(ndev, TGC_TQP_AVBMODE1 | 0x00222200, TGC);
+
+	/* Timestamp enable */
+	ravb_write(ndev, TCCR_TFEN, TCCR);
+
+	/* Interrupt enable: */
+	/* Frame receive */
+	ravb_write(ndev, RIC0_FRE0 | RIC0_FRE1, RIC0);
+	/* Receive FIFO full warning */
+	ravb_write(ndev, RIC1_RFWE, 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);
+
+	/* Setting the control will start the AVB-DMAC process. */
+	ravb_write(ndev, (ravb_read(ndev, CCC) & ~CCC_OPC) | CCC_OPC_OPERATION,
+		   CCC);
+
+	return 0;
+}
+
+/* Free TX skb function for AVB-IP */
+static int ravb_tx_free(struct net_device *ndev, int q)
+{
+	struct ravb_private *priv = netdev_priv(ndev);
+	struct net_device_stats *stats = &priv->stats[q];
+	struct ravb_tx_desc *desc;
+	int free_num = 0;
+	int entry = 0;
+	u32 size;
+
+	for (; priv->cur_tx[q] - priv->dirty_tx[q] > 0; priv->dirty_tx[q]++) {
+		entry = priv->dirty_tx[q] % priv->num_tx_ring[q];
+		desc = &priv->tx_ring[q][entry];
+		if (desc->die_dt != DT_FEMPTY)
+			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]) {
+			dma_unmap_single(&ndev->dev, le32_to_cpu(desc->dptr),
+					 size, DMA_TO_DEVICE);
+			dev_kfree_skb_any(priv->tx_skb[q][entry]);
+			priv->tx_skb[q][entry] = NULL;
+			free_num++;
+		}
+		stats->tx_packets++;
+		stats->tx_bytes += size;
+		desc->die_dt = DT_EEMPTY;
+	}
+	return free_num;
+}
+
+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);
+				break;
+			}
+		}
+		ravb_write(ndev, ravb_read(ndev, TCCR) | TCCR_TFR, TCCR);
+	}
+}
+
+/* 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);
+	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;
+	u16 pkt_len = 0;
+	u8  desc_status;
+	int limit;
+
+	if (quota)
+		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;
+
+		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_sync_single_for_cpu(&ndev->dev,
+						le32_to_cpu(desc->dptr),
+						ALIGN(PKT_BUF_SZ, 16),
+						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 (q == RAVB_NC)
+				netif_rx(skb);
+			else
+				netif_receive_skb(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];
+		/* The size of the buffer should be on 16-byte boundary. */
+		desc->ds_cc = cpu_to_le16(ALIGN(PKT_BUF_SZ, 16));
+
+		if (!priv->rx_skb[q][entry]) {
+			skb = netdev_alloc_skb(ndev,
+					       PKT_BUF_SZ + RAVB_ALIGN - 1);
+			if (!skb)
+				break;	/* Better luck next round. */
+			ravb_set_buffer_align(skb);
+			dma_unmap_single(&ndev->dev, le32_to_cpu(desc->dptr),
+					 ALIGN(PKT_BUF_SZ, 16),
+					 DMA_FROM_DEVICE);
+			dma_addr = dma_map_single(&ndev->dev, skb->data,
+						  le16_to_cpu(desc->ds_cc),
+						  DMA_FROM_DEVICE);
+			skb_checksum_none_assert(skb);
+			if (dma_mapping_error(&ndev->dev, dma_addr)) {
+				dev_kfree_skb_any(skb);
+				break;
+			}
+			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;
+	}
+
+	if (quota)
+		*quota -= limit - (++boguscnt);
+
+	return boguscnt <= 0;
+}
+
+static void ravb_rcv_snd_disable(struct net_device *ndev)
+{
+	/* Disable TX and RX */
+	ravb_write(ndev, ravb_read(ndev, ECMR) & ~(ECMR_RE | ECMR_TE), ECMR);
+}
+
+static void ravb_rcv_snd_enable(struct net_device *ndev)
+{
+	/* Enable TX and RX */
+	ravb_write(ndev, ravb_read(ndev, ECMR) | ECMR_RE | ECMR_TE, ECMR);
+}
+
+/* function for waiting dma process finished */
+static int ravb_stop_dma(struct net_device *ndev)
+{
+	int error;
+
+	/* Wait for stopping the hardware TX process */
+	error = ravb_wait(ndev, TCCR,
+			  TCCR_TSRQ0 | TCCR_TSRQ1 | TCCR_TSRQ2 | TCCR_TSRQ3, 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_config(ndev);
+}
+
+/* E-MAC interrupt handler */
+static void ravb_emac_interrupt(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_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);
+		}
+	}
+}
+
+/* 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);
+	if (eis & EIS_QFS) {
+		ris2 = ravb_read(ndev, RIS2);
+		ravb_write(ndev, ~(RIS2_QFF0 | RIS2_RFFF), 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 irqreturn_t ravb_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);
+
+	/* Received and transmitted interrupts */
+	if (iss & (ISS_FRS | ISS_FTS | ISS_TFUS)) {
+		u32 ris0, ric0, tic, tis;
+
+		ris0 = ravb_read(ndev, RIS0);
+		ric0 = ravb_read(ndev, RIC0);
+		tis  = ravb_read(ndev, TIS);
+		tic  = ravb_read(ndev, TIC);
+		ravb_write(ndev, ~(TIS_FTF1 | TIS_TFUF), TIS);
+
+		/* Received network control queue */
+		if (ris0 & RIS0_FRF1) {
+			ravb_write(ndev, ~RIS0_FRF1, RIS0);
+			/* Timestamp of network control packets that is based
+			 * on IEEE802.1AS, is used time synchronization of PTP.
+			 * It should not be handled by NAPI scheduling, because
+			 * it needs to be received as soon as possible.
+			 */
+			ravb_rx(ndev, NULL, RAVB_NC);
+			result = IRQ_HANDLED;
+		}
+
+		/* Timestamp updated */
+		if (tis & TIS_TFUF) {
+			ravb_get_tx_tstamp(ndev);
+			result = IRQ_HANDLED;
+		}
+
+		/* Transmitted network control queue */
+		if (tis & TIS_FTF1) {
+			ravb_tx_free(ndev, RAVB_NC);
+			netif_wake_subqueue(ndev, RAVB_NC);
+			result = IRQ_HANDLED;
+		}
+
+		/* Received and transmitted best effort queue */
+		if (((ris0 & ric0) & RIS0_FRF0) || ((tis & tic) & TIS_FTF0)) {
+			if (napi_schedule_prep(&priv->napi)) {
+				/* Mask RX and TX interrupts */
+				ravb_write(ndev, ric0 & ~RIC0_FRE0, RIC0);
+				ravb_write(ndev, tic  & ~TIC_FTE0,  TIC);
+				__napi_schedule(&priv->napi);
+			} 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);
+			}
+			result = IRQ_HANDLED;
+		}
+	}
+
+	/* E-MAC status summary */
+	if (iss & ISS_MS) {
+		ravb_emac_interrupt(ndev);
+		result = IRQ_HANDLED;
+	}
+
+	/* Error status summary */
+	if (iss & ISS_ES) {
+		ravb_error_interrupt(ndev);
+		result = IRQ_HANDLED;
+	}
+
+	mmiowb();
+	spin_unlock(&priv->lock);
+	return result;
+}
+
+static int ravb_poll(struct napi_struct *napi, int budget)
+{
+	struct ravb_private *priv = container_of(napi, struct ravb_private,
+						 napi);
+	struct net_device *ndev = napi->dev;
+	unsigned long flags;
+	int quota = budget;
+	u32 ris0, tis;
+
+	for (;;) {
+		tis = ravb_read(ndev, TIS);
+		ris0 = ravb_read(ndev, RIS0);
+		if (!((ris0 & RIS0_FRF0) || (tis & TIS_FTF0)))
+			break;
+
+		/* Processing RX Descriptor Ring */
+		if (ris0 & RIS0_FRF0) {
+			/* Clear RX interrupt */
+			ravb_write(ndev, ~RIS0_FRF0, RIS0);
+			if (ravb_rx(ndev, &quota, RAVB_BE))
+				goto out;
+		}
+		/* Processing TX Descriptor Ring */
+		if (tis & TIS_FTF0) {
+			spin_lock_irqsave(&priv->lock, flags);
+			/* Clear TX interrupt */
+			ravb_write(ndev, ~TIS_FTF0, TIS);
+			ravb_tx_free(ndev, RAVB_BE);
+			netif_wake_subqueue(ndev, RAVB_BE);
+			mmiowb();
+			spin_unlock_irqrestore(&priv->lock, flags);
+		}
+	}
+
+	napi_complete(napi);
+
+	/* Re-enable RX/TX interrupts */
+	spin_lock_irqsave(&priv->lock, flags);
+	ravb_write(ndev, ravb_read(ndev, RIC0) | RIC0_FRE0, RIC0);
+	ravb_write(ndev, ravb_read(ndev, TIC)  | TIC_FTE0,  TIC);
+	mmiowb();
+	spin_unlock_irqrestore(&priv->lock, flags);
+
+	/* Receive error message handling */
+	priv->rx_over_errors =  priv->stats[RAVB_BE].rx_over_errors;
+	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;
+		netif_err(priv, rx_err, ndev, "Receive Descriptor Empty\n");
+	}
+	if (priv->rx_fifo_errors != ndev->stats.rx_fifo_errors) {
+		ndev->stats.rx_fifo_errors = priv->rx_fifo_errors;
+		netif_err(priv, rx_err, ndev, "Receive FIFO Overflow\n");
+	}
+out:
+	return budget - quota;
+}
+
+/* PHY state control function */
+static void ravb_adjust_link(struct net_device *ndev)
+{
+	struct ravb_private *priv = netdev_priv(ndev);
+	struct phy_device *phydev = priv->phydev;
+	bool new_state = false;
+
+	if (phydev->link) {
+		if (phydev->duplex != priv->duplex) {
+			new_state = true;
+			priv->duplex = phydev->duplex;
+			ravb_set_duplex(ndev);
+		}
+
+		if (phydev->speed != priv->speed) {
+			new_state = true;
+			priv->speed = phydev->speed;
+			ravb_set_rate(ndev);
+		}
+		if (!priv->link) {
+			ravb_write(ndev, ravb_read(ndev, ECMR) & ~ECMR_TXF,
+				   ECMR);
+			new_state = true;
+			priv->link = phydev->link;
+			if (priv->no_avb_link)
+				ravb_rcv_snd_enable(ndev);
+		}
+	} else if (priv->link) {
+		new_state = true;
+		priv->link = 0;
+		priv->speed = 0;
+		priv->duplex = -1;
+		if (priv->no_avb_link)
+			ravb_rcv_snd_disable(ndev);
+	}
+
+	if (new_state && netif_msg_link(priv))
+		phy_print_status(phydev);
+}
+
+/* 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);
+	struct phy_device *phydev;
+	struct device_node *pn;
+
+	priv->link = 0;
+	priv->speed = 0;
+	priv->duplex = -1;
+
+	/* Try connecting to PHY */
+	pn = of_parse_phandle(np, "phy-handle", 0);
+	phydev = of_phy_connect(ndev, pn, ravb_adjust_link, 0,
+				priv->phy_interface);
+	if (!phydev) {
+		netdev_err(ndev, "failed to connect PHY\n");
+		return -ENOENT;
+	}
+
+	netdev_info(ndev, "attached PHY %d (IRQ %d) to driver %s\n",
+		    phydev->addr, phydev->irq, phydev->drv->name);
+
+	priv->phydev = phydev;
+
+	return 0;
+}
+
+/* PHY control start function */
+static int ravb_phy_start(struct net_device *ndev)
+{
+	struct ravb_private *priv = netdev_priv(ndev);
+	int error;
+
+	error = ravb_phy_init(ndev);
+	if (error)
+		return error;
+
+	phy_start(priv->phydev);
+
+	return 0;
+}
+
+static int ravb_get_settings(struct net_device *ndev, struct ethtool_cmd *ecmd)
+{
+	struct ravb_private *priv = netdev_priv(ndev);
+	int error = -ENODEV;
+	unsigned long flags;
+
+	if (priv->phydev) {
+		spin_lock_irqsave(&priv->lock, flags);
+		error = phy_ethtool_gset(priv->phydev, ecmd);
+		spin_unlock_irqrestore(&priv->lock, flags);
+	}
+
+	return error;
+}
+
+static int ravb_set_settings(struct net_device *ndev, struct ethtool_cmd *ecmd)
+{
+	struct ravb_private *priv = netdev_priv(ndev);
+	unsigned long flags;
+	int error;
+
+	if (!priv->phydev)
+		return -ENODEV;
+
+	spin_lock_irqsave(&priv->lock, flags);
+
+	/* Disable TX and RX */
+	ravb_rcv_snd_disable(ndev);
+
+	error = phy_ethtool_sset(priv->phydev, ecmd);
+	if (error)
+		goto error_exit;
+
+	if (ecmd->duplex == DUPLEX_FULL)
+		priv->duplex = 1;
+	else
+		priv->duplex = 0;
+
+	ravb_set_duplex(ndev);
+
+error_exit:
+	mdelay(1);
+
+	/* Enable TX and RX */
+	ravb_rcv_snd_enable(ndev);
+
+	mmiowb();
+	spin_unlock_irqrestore(&priv->lock, flags);
+
+	return error;
+}
+
+static int ravb_nway_reset(struct net_device *ndev)
+{
+	struct ravb_private *priv = netdev_priv(ndev);
+	int error = -ENODEV;
+	unsigned long flags;
+
+	if (priv->phydev) {
+		spin_lock_irqsave(&priv->lock, flags);
+		error = phy_start_aneg(priv->phydev);
+		spin_unlock_irqrestore(&priv->lock, flags);
+	}
+
+	return error;
+}
+
+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[][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",
+};
+
+#define RAVB_STATS_LEN	ARRAY_SIZE(ravb_gstrings_stats)
+
+static int ravb_get_sset_count(struct net_device *netdev, int sset)
+{
+	switch (sset) {
+	case ETH_SS_STATS:
+		return RAVB_STATS_LEN;
+	default:
+		return -EOPNOTSUPP;
+	}
+}
+
+static void ravb_get_ethtool_stats(struct net_device *ndev,
+				   struct ethtool_stats *stats, u64 *data)
+{
+	struct ravb_private *priv = netdev_priv(ndev);
+	int i = 0;
+	int q;
+
+	/* Device-specific stats */
+	for (q = RAVB_BE; q < NUM_RX_QUEUE; 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)
+{
+	switch (stringset) {
+	case ETH_SS_STATS:
+		memcpy(data, *ravb_gstrings_stats, sizeof(ravb_gstrings_stats));
+		break;
+	}
+}
+
+static void ravb_get_ringparam(struct net_device *ndev,
+			       struct ethtool_ringparam *ring)
+{
+	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 ravb_private *priv = netdev_priv(ndev);
+	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);
+		/* 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);
+		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);
+
+		netif_device_attach(ndev);
+	}
+
+	return 0;
+}
+
+static int ravb_get_ts_info(struct net_device *ndev,
+			    struct ethtool_ts_info *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);
+	info->phc_index = -1;
+
+	return 0;
+}
+
+static const struct ethtool_ops ravb_ethtool_ops = {
+	.get_settings		= ravb_get_settings,
+	.set_settings		= ravb_set_settings,
+	.nway_reset		= ravb_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,
+};
+
+/* Network device open function for Ethernet AVB */
+static int ravb_open(struct net_device *ndev)
+{
+	struct ravb_private *priv = netdev_priv(ndev);
+	int error;
+
+	napi_enable(&priv->napi);
+
+	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;
+	}
+
+	/* Device init */
+	error = ravb_dmac_init(ndev);
+	if (error)
+		goto out_free_irq;
+	ravb_emac_init(ndev);
+
+	netif_tx_start_all_queues(ndev);
+
+	/* PHY control start */
+	error = ravb_phy_start(ndev);
+	if (error)
+		goto out_free_irq;
+
+	return 0;
+
+out_free_irq:
+	free_irq(ndev->irq, ndev);
+out_napi_off:
+	napi_disable(&priv->napi);
+	return error;
+}
+
+/* Timeout function for Ethernet AVB */
+static void ravb_tx_timeout(struct net_device *ndev)
+{
+	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);
+	struct net_device *ndev = priv->ndev;
+
+	netif_tx_stop_all_queues(ndev);
+
+	/* Wait for DMA stopping */
+	ravb_stop_dma(ndev);
+
+	ravb_ring_free(ndev, RAVB_BE);
+	ravb_ring_free(ndev, RAVB_NC);
+
+	/* Device init */
+	ravb_dmac_init(ndev);
+	ravb_emac_init(ndev);
+
+	netif_tx_start_all_queues(ndev);
+}
+
+/* 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);
+	struct ravb_tstamp_skb *ts_skb = NULL;
+	u16 q = skb_get_queue_mapping(skb);
+	struct ravb_tx_desc *desc;
+	unsigned long flags;
+	u32 dma_addr;
+	void *buffer;
+	u32 entry;
+	u32 tccr;
+
+	spin_lock_irqsave(&priv->lock, flags);
+	if (priv->cur_tx[q] - priv->dirty_tx[q] >= priv->num_tx_ring[q]) {
+		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;
+	}
+	entry = priv->cur_tx[q] % priv->num_tx_ring[q];
+	priv->tx_skb[q][entry] = skb;
+
+	if (skb_put_padto(skb, ETH_ZLEN))
+		goto drop;
+
+	buffer = PTR_ALIGN(priv->tx_buffers[q][entry], RAVB_ALIGN);
+	memcpy(buffer, skb->data, skb->len);
+	desc = &priv->tx_ring[q][entry];
+	desc->ds_tagl = cpu_to_le16(skb->len);
+	dma_addr = dma_map_single(&ndev->dev, buffer, skb->len, DMA_TO_DEVICE);
+	if (dma_mapping_error(&ndev->dev, dma_addr))
+		goto drop;
+	desc->dptr = cpu_to_le32(dma_addr);
+
+	/* TX timestamp required */
+	if (q == RAVB_NC) {
+		ts_skb = kmalloc(sizeof(*ts_skb), GFP_ATOMIC);
+		if (!ts_skb) {
+			dma_unmap_single(&ndev->dev, dma_addr, skb->len,
+					 DMA_TO_DEVICE);
+			goto drop;
+		}
+		ts_skb->skb = 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;
+		skb_tx_timestamp(skb);
+		desc->tagh_tsr = (ts_skb->tag >> 4) | TX_TSR;
+		desc->ds_tagl |= le16_to_cpu(ts_skb->tag << 12);
+	}
+
+	/* Descriptor type must be set after all the above writes */
+	dma_wmb();
+	desc->die_dt = DT_FSINGLE;
+
+	tccr = ravb_read(ndev, TCCR);
+	if (!(tccr & (TCCR_TSRQ0 << q)))
+		ravb_write(ndev, tccr | (TCCR_TSRQ0 << q), TCCR);
+
+	priv->cur_tx[q]++;
+	if (priv->cur_tx[q] - priv->dirty_tx[q] >= priv->num_tx_ring[q] &&
+	    !ravb_tx_free(ndev, q))
+		netif_stop_subqueue(ndev, q);
+
+exit:
+	mmiowb();
+	spin_unlock_irqrestore(&priv->lock, flags);
+	return NETDEV_TX_OK;
+
+drop:
+	dev_kfree_skb_any(skb);
+	priv->tx_skb[q][entry] = NULL;
+	goto exit;
+}
+
+static u16 ravb_select_queue(struct net_device *ndev, struct sk_buff *skb,
+			     void *accel_priv, select_queue_fallback_t fallback)
+{
+	/* 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);
+	struct net_device_stats *nstats, *stats0, *stats1;
+
+	nstats = &ndev->stats;
+	stats0 = &priv->stats[RAVB_BE];
+	stats1 = &priv->stats[RAVB_NC];
+
+	nstats->tx_dropped += ravb_read(ndev, TROCR);
+	ravb_write(ndev, 0, TROCR);	/* (write clear) */
+	nstats->collisions += ravb_read(ndev, CDCR);
+	ravb_write(ndev, 0, CDCR);	/* (write clear) */
+	nstats->tx_carrier_errors += ravb_read(ndev, LCCR);
+	ravb_write(ndev, 0, LCCR);	/* (write clear) */
+
+	nstats->tx_carrier_errors += ravb_read(ndev, CERCR);
+	ravb_write(ndev, 0, CERCR);	/* (write clear) */
+	nstats->tx_carrier_errors += ravb_read(ndev, CEECR);
+	ravb_write(ndev, 0, CEECR);	/* (write clear) */
+
+	nstats->rx_packets = stats0->rx_packets + stats1->rx_packets;
+	nstats->tx_packets = stats0->tx_packets + stats1->tx_packets;
+	nstats->rx_bytes = stats0->rx_bytes + stats1->rx_bytes;
+	nstats->tx_bytes = stats0->tx_bytes + stats1->tx_bytes;
+	nstats->multicast = stats0->multicast + stats1->multicast;
+	nstats->rx_errors = stats0->rx_errors + stats1->rx_errors;
+	nstats->rx_crc_errors = stats0->rx_crc_errors + stats1->rx_crc_errors;
+	nstats->rx_frame_errors =
+		stats0->rx_frame_errors + stats1->rx_frame_errors;
+	nstats->rx_length_errors =
+		stats0->rx_length_errors + stats1->rx_length_errors;
+	nstats->rx_missed_errors =
+		stats0->rx_missed_errors + stats1->rx_missed_errors;
+	nstats->rx_over_errors =
+		stats0->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;
+	u32 ecmr;
+
+	spin_lock_irqsave(&priv->lock, flags);
+	ecmr = ravb_read(ndev, ECMR);
+	if (ndev->flags & IFF_PROMISC)
+		ecmr |=  ECMR_PRM;
+	else
+		ecmr &= ~ECMR_PRM;
+	ravb_write(ndev, ecmr, ECMR);
+	mmiowb();
+	spin_unlock_irqrestore(&priv->lock, flags);
+}
+
+/* Device close function for Ethernet AVB */
+static int ravb_close(struct net_device *ndev)
+{
+	struct ravb_private *priv = netdev_priv(ndev);
+	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, RIC1);
+	ravb_write(ndev, 0, RIC2);
+	ravb_write(ndev, 0, TIC);
+
+	/* 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 */
+	list_for_each_entry_safe(ts_skb, ts_skb2, &priv->ts_skb_list, list) {
+		list_del(&ts_skb->list);
+		kfree(ts_skb);
+	}
+
+	/* PHY disconnect */
+	if (priv->phydev) {
+		phy_stop(priv->phydev);
+		phy_disconnect(priv->phydev);
+		priv->phydev = NULL;
+	}
+
+	free_irq(ndev->irq, ndev);
+
+	napi_disable(&priv->napi);
+
+	/* Free all the skb's in the RX queue and the DMA buffers. */
+	ravb_ring_free(ndev, RAVB_BE);
+	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;
+	if (priv->tstamp_rx_ctrl & RAVB_RXTSTAMP_TYPE_V2_L2_EVENT)
+		config.rx_filter = HWTSTAMP_FILTER_PTP_V2_L2_EVENT;
+	else if (priv->tstamp_rx_ctrl & RAVB_RXTSTAMP_TYPE_ALL)
+		config.rx_filter = HWTSTAMP_FILTER_ALL;
+	else
+		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;
+
+	/* Reserved for future extensions */
+	if (config.flags)
+		return -EINVAL;
+
+	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 ravb_private *priv = netdev_priv(ndev);
+	struct phy_device *phydev = priv->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 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_do_ioctl		= ravb_do_ioctl,
+	.ndo_validate_addr	= eth_validate_addr,
+	.ndo_set_mac_address	= eth_mac_addr,
+	.ndo_change_mtu		= eth_change_mtu,
+};
+
+/* MDIO bus init function */
+static int ravb_mdio_init(struct ravb_private *priv)
+{
+	struct platform_device *pdev = priv->pdev;
+	struct device *dev = &pdev->dev;
+	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;
+
+	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 int ravb_probe(struct platform_device *pdev)
+{
+	struct device_node *np = pdev->dev.of_node;
+	struct ravb_private *priv;
+	struct net_device *ndev;
+	int error, irq, q;
+	struct resource *res;
+
+	if (!np) {
+		dev_err(&pdev->dev,
+			"this driver is required to be instantiated from device tree\n");
+		return -EINVAL;
+	}
+
+	/* Get base address */
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (!res) {
+		dev_err(&pdev->dev, "invalid resource\n");
+		return -EINVAL;
+	}
+
+	ndev = alloc_etherdev_mqs(sizeof(struct ravb_private),
+				  NUM_TX_QUEUE, NUM_RX_QUEUE);
+	if (!ndev)
+		return -ENOMEM;
+
+	pm_runtime_enable(&pdev->dev);
+	pm_runtime_get_sync(&pdev->dev);
+
+	/* The Ether-specific entries in the device structure. */
+	ndev->base_addr = res->start;
+	ndev->dma = -1;
+	irq = platform_get_irq(pdev, 0);
+	if (irq < 0) {
+		error = -ENODEV;
+		goto out_release;
+	}
+	ndev->irq = irq;
+
+	SET_NETDEV_DEV(ndev, &pdev->dev);
+
+	priv = netdev_priv(ndev);
+	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;
+	priv->num_tx_ring[RAVB_NC] = NC_TX_RING_SIZE;
+	priv->num_rx_ring[RAVB_NC] = NC_RX_RING_SIZE;
+	priv->addr = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR(priv->addr)) {
+		error = PTR_ERR(priv->addr);
+		goto out_release;
+	}
+
+	spin_lock_init(&priv->lock);
+	INIT_WORK(&priv->work, ravb_tx_timeout_work);
+
+	priv->phy_interface = of_get_phy_mode(np);
+
+	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");
+
+	/* Set function */
+	ndev->netdev_ops = &ravb_netdev_ops;
+	ndev->ethtool_ops = &ravb_ethtool_ops;
+
+	/* Set AVB config mode */
+	ravb_write(ndev, (ravb_read(ndev, CCC) & ~CCC_OPC) | CCC_OPC_CONFIG,
+		   CCC);
+
+	/* Set CSEL value */
+	ravb_write(ndev, (ravb_read(ndev, CCC) & ~CCC_CSEL) | CCC_CSEL_HPB,
+		   CCC);
+
+	/* Set GTI value */
+	ravb_write(ndev, ((1000 << 20) / 130) & GTI_TIV, GTI);
+
+	/* Request GTI loading */
+	ravb_write(ndev, ravb_read(ndev, GCCR) | GCCR_LTI, GCCR);
+
+	/* Allocate descriptor base address table */
+	priv->desc_bat_size = sizeof(struct ravb_desc) * DBAT_ENTRY_NUM;
+	priv->desc_bat = dma_alloc_coherent(NULL, priv->desc_bat_size,
+					    &priv->desc_bat_dma, GFP_KERNEL);
+	if (!priv->desc_bat) {
+		dev_err(&ndev->dev,
+			"Cannot allocate desc base address table (size %d bytes)\n",
+			priv->desc_bat_size);
+		error = -ENOMEM;
+		goto out_release;
+	}
+	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);
+
+	/* Debug message level */
+	priv->msg_enable = RAVB_DEF_MSG_ENABLE;
+
+	/* Read and set MAC address */
+	ravb_read_mac_address(ndev, of_get_mac_address(np));
+	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(&ndev->dev, "failed to initialize MDIO\n");
+		goto out_dma_free;
+	}
+
+	netif_napi_add(ndev, &priv->napi, ravb_poll, 64);
+
+	/* Network device register */
+	error = register_netdev(ndev);
+	if (error)
+		goto out_napi_del;
+
+	/* 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:
+	netif_napi_del(&priv->napi);
+	ravb_mdio_release(priv);
+out_dma_free:
+	dma_free_coherent(NULL, priv->desc_bat_size, priv->desc_bat,
+			  priv->desc_bat_dma);
+out_release:
+	if (ndev)
+		free_netdev(ndev);
+
+	pm_runtime_put(&pdev->dev);
+	pm_runtime_disable(&pdev->dev);
+	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);
+
+	dma_free_coherent(NULL, priv->desc_bat_size, priv->desc_bat,
+			  priv->desc_bat_dma);
+	/* Set reset mode */
+	ravb_write(ndev, CCC_OPC_RESET, CCC);
+	pm_runtime_put_sync(&pdev->dev);
+	unregister_netdev(ndev);
+	netif_napi_del(&priv->napi);
+	ravb_mdio_release(priv);
+	pm_runtime_disable(&pdev->dev);
+	free_netdev(ndev);
+	platform_set_drvdata(pdev, NULL);
+
+	return 0;
+}
+
+#ifdef CONFIG_PM
+static int 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 = {
+	.runtime_suspend = ravb_runtime_nop,
+	.runtime_resume = ravb_runtime_nop,
+};
+
+#define RAVB_PM_OPS (&ravb_dev_pm_ops)
+#else
+#define RAVB_PM_OPS NULL
+#endif
+
+static const struct of_device_id ravb_match_table[] = {
+	{ .compatible = "renesas,etheravb-r8a7790" },
+	{ .compatible = "renesas,etheravb-r8a7794" },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, ravb_match_table);
+
+static struct platform_driver ravb_driver = {
+	.probe		= ravb_probe,
+	.remove		= ravb_remove,
+	.driver = {
+		.name	= "ravb",
+		.pm	= RAVB_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");
Index: net-next/drivers/net/ethernet/renesas/ravb.h
===================================================================
--- /dev/null
+++ net-next/drivers/net/ethernet/renesas/ravb.h
@@ -0,0 +1,806 @@
+/* Renesas Ethernet AVB device driver
+ *
+ * Copyright (C) 2014-2015 Renesas Electronics Corporation
+ * Copyright (C) 2015 Renesas Solutions Corp.
+ * Copyright (C) 2015 Cogent Embedded, Inc. <[email-masked]>
+ *
+ * Based on the SuperH Ethernet driver
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License version 2,
+ * as published by the Free Software Foundation.
+ */
+
+#ifndef __RAVB_H__
+#define __RAVB_H__
+
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/mdio-bitbang.h>
+#include <linux/netdevice.h>
+#include <linux/phy.h>
+
+#define BE_TX_RING_SIZE	64	/* TX ring size for Best Effort */
+#define BE_RX_RING_SIZE	1024	/* RX ring size for Best Effort */
+#define NC_TX_RING_SIZE	64	/* TX ring size for Network Control */
+#define NC_RX_RING_SIZE	64	/* RX ring size for Network Control */
+#define BE_TX_RING_MIN	64
+#define BE_RX_RING_MIN	64
+#define BE_TX_RING_MAX	1024
+#define BE_RX_RING_MAX	2048
+
+#define PKT_BUF_SZ	1538
+
+/* Driver's parameters */
+#define RAVB_ALIGN	128
+
+/* Hardware time stamp */
+#define RAVB_TXTSTAMP_VALID	0x00000001	/* TX timestamp valid */
+#define RAVB_TXTSTAMP_ENABLED	0x00000010	/* Enable TX timestamping */
+
+#define RAVB_RXTSTAMP_VALID	0x00000001	/* RX timestamp valid */
+#define RAVB_RXTSTAMP_TYPE	0x00000006	/* RX type mask */
+#define RAVB_RXTSTAMP_TYPE_V2_L2_EVENT 0x00000002
+#define RAVB_RXTSTAMP_TYPE_ALL	0x00000006
+#define RAVB_RXTSTAMP_ENABLED	0x00000010	/* Enable RX timestamping */
+
+enum ravb_reg {
+	/* AVB-DMAC registers */
+	CCC	= 0x0000,
+	DBAT	= 0x0004,
+	DLR	= 0x0008,
+	CSR	= 0x000C,
+	CDAR0	= 0x0010,
+	CDAR1	= 0x0014,
+	CDAR2	= 0x0018,
+	CDAR3	= 0x001C,
+	CDAR4	= 0x0020,
+	CDAR5	= 0x0024,
+	CDAR6	= 0x0028,
+	CDAR7	= 0x002C,
+	CDAR8	= 0x0030,
+	CDAR9	= 0x0034,
+	CDAR10	= 0x0038,
+	CDAR11	= 0x003C,
+	CDAR12	= 0x0040,
+	CDAR13	= 0x0044,
+	CDAR14	= 0x0048,
+	CDAR15	= 0x004C,
+	CDAR16	= 0x0050,
+	CDAR17	= 0x0054,
+	CDAR18	= 0x0058,
+	CDAR19	= 0x005C,
+	CDAR20	= 0x0060,
+	CDAR21	= 0x0064,
+	ESR	= 0x0088,
+	RCR	= 0x0090,
+	RQC0	= 0x0094,
+	RQC1	= 0x0098,
+	RQC2	= 0x009C,
+	RQC3	= 0x00A0,
+	RQC4	= 0x00A4,
+	RPC	= 0x00B0,
+	UFCW	= 0x00BC,
+	UFCS	= 0x00C0,
+	UFCV0	= 0x00C4,
+	UFCV1	= 0x00C8,
+	UFCV2	= 0x00CC,
+	UFCV3	= 0x00D0,
+	UFCV4	= 0x00D4,
+	UFCD0	= 0x00E0,
+	UFCD1	= 0x00E4,
+	UFCD2	= 0x00E8,
+	UFCD3	= 0x00EC,
+	UFCD4	= 0x00F0,
+	SFO	= 0x00FC,
+	SFP0	= 0x0100,
+	SFP1	= 0x0104,
+	SFP2	= 0x0108,
+	SFP3	= 0x010C,
+	SFP4	= 0x0110,
+	SFP5	= 0x0114,
+	SFP6	= 0x0118,
+	SFP7	= 0x011C,
+	SFP8	= 0x0120,
+	SFP9	= 0x0124,
+	SFP10	= 0x0128,
+	SFP11	= 0x012C,
+	SFP12	= 0x0130,
+	SFP13	= 0x0134,
+	SFP14	= 0x0138,
+	SFP15	= 0x013C,
+	SFP16	= 0x0140,
+	SFP17	= 0x0144,
+	SFP18	= 0x0148,
+	SFP19	= 0x014C,
+	SFP20	= 0x0150,
+	SFP21	= 0x0154,
+	SFP22	= 0x0158,
+	SFP23	= 0x015C,
+	SFP24	= 0x0160,
+	SFP25	= 0x0164,
+	SFP26	= 0x0168,
+	SFP27	= 0x016C,
+	SFP28	= 0x0170,
+	SFP29	= 0x0174,
+	SFP30	= 0x0178,
+	SFP31	= 0x017C,
+	SFM0	= 0x01C0,
+	SFM1	= 0x01C4,
+	TGC	= 0x0300,
+	TCCR	= 0x0304,
+	TSR	= 0x0308,
+	TFA0	= 0x0310,
+	TFA1	= 0x0314,
+	TFA2	= 0x0318,
+	CIVR0	= 0x0320,
+	CIVR1	= 0x0324,
+	CDVR0	= 0x0328,
+	CDVR1	= 0x032C,
+	CUL0	= 0x0330,
+	CUL1	= 0x0334,
+	CLL0	= 0x0338,
+	CLL1	= 0x033C,
+	DIC	= 0x0350,
+	DIS	= 0x0354,
+	EIC	= 0x0358,
+	EIS	= 0x035C,
+	RIC0	= 0x0360,
+	RIS0	= 0x0364,
+	RIC1	= 0x0368,
+	RIS1	= 0x036C,
+	RIC2	= 0x0370,
+	RIS2	= 0x0374,
+	TIC	= 0x0378,
+	TIS	= 0x037C,
+	ISS	= 0x0380,
+	GCCR	= 0x0390,
+	GMTT	= 0x0394,
+	GPTC	= 0x0398,
+	GTI	= 0x039C,
+	GTO0	= 0x03A0,
+	GTO1	= 0x03A4,
+	GTO2	= 0x03A8,
+	GIC	= 0x03AC,
+	GIS	= 0x03B0,
+	GCPT	= 0x03B4,	/* Undocumented? */
+	GCT0	= 0x03B8,
+	GCT1	= 0x03BC,
+	GCT2	= 0x03C0,
+
+	/* E-MAC registers */
+	ECMR	= 0x0500,
+	RFLR	= 0x0508,
+	ECSR	= 0x0510,
+	ECSIPR	= 0x0518,
+	PIR	= 0x0520,
+	PSR	= 0x0528,
+	PIPR	= 0x052c,
+	MPR	= 0x0558,
+	PFTCR	= 0x055c,
+	PFRCR	= 0x0560,
+	GECMR	= 0x05b0,
+	MAHR	= 0x05c0,
+	MALR	= 0x05c8,
+	TROCR	= 0x0700,	/* Undocumented? */
+	CDCR	= 0x0708,	/* Undocumented? */
+	LCCR	= 0x0710,	/* Undocumented? */
+	CEFCR	= 0x0740,
+	FRECR	= 0x0748,
+	TSFRCR	= 0x0750,
+	TLFRCR	= 0x0758,
+	RFCR	= 0x0760,
+	CERCR	= 0x0768,	/* Undocumented? */
+	CEECR	= 0x0770,	/* Undocumented? */
+	MAFCR	= 0x0778,
+};
+
+
+/* Register bits of the Ethernet AVB */
+/* CCC */
+enum CCC_BIT {
+	CCC_OPC		= 0x00000003,
+	CCC_OPC_RESET	= 0x00000000,
+	CCC_OPC_CONFIG	= 0x00000001,
+	CCC_OPC_OPERATION = 0x00000002,
+	CCC_DTSR	= 0x00000100,
+	CCC_CSEL	= 0x00030000,
+	CCC_CSEL_HPB	= 0x00010000,
+	CCC_CSEL_ETH_TX	= 0x00020000,
+	CCC_CSEL_GMII_REF = 0x00030000,
+	CCC_BOC		= 0x00100000,	/* Undocumented? */
+	CCC_LBME	= 0x01000000,
+};
+
+/* CSR */
+enum CSR_BIT {
+	CSR_OPS		= 0x0000000F,
+	CSR_OPS_RESET	= 0x00000001,
+	CSR_OPS_CONFIG	= 0x00000002,
+	CSR_OPS_OPERATION = 0x00000004,
+	CSR_OPS_STANDBY	= 0x00000008,	/* Undocumented? */
+	CSR_DTS		= 0x00000100,
+	CSR_TPO0	= 0x00010000,
+	CSR_TPO1	= 0x00020000,
+	CSR_TPO2	= 0x00040000,
+	CSR_TPO3	= 0x00080000,
+	CSR_RPO		= 0x00100000,
+};
+
+/* ESR */
+enum ESR_BIT {
+	ESR_EQN		= 0x0000001F,
+	ESR_ET		= 0x00000F00,
+	ESR_EIL		= 0x00001000,
+};
+
+/* RCR */
+enum RCR_BIT {
+	RCR_EFFS	= 0x00000001,
+	RCR_ENCF	= 0x00000002,
+	RCR_ESF		= 0x0000000C,
+	RCR_ETS0	= 0x00000010,
+	RCR_ETS2	= 0x00000020,
+	RCR_RFCL	= 0x1FFF0000,
+};
+
+/* RQC0/1/2/3/4 */
+enum RQC_BIT {
+	RQC_RSM0	= 0x00000003,
+	RQC_UFCC0	= 0x00000030,
+	RQC_RSM1	= 0x00000300,
+	RQC_UFCC1	= 0x00003000,
+	RQC_RSM2	= 0x00030000,
+	RQC_UFCC2	= 0x00300000,
+	RQC_RSM3	= 0x03000000,
+	RQC_UFCC3	= 0x30000000,
+};
+
+/* RPC */
+enum RPC_BIT {
+	RPC_PCNT	= 0x00000700,
+	RPC_DCNT	= 0x00FF0000,
+};
+
+/* UFCW */
+enum UFCW_BIT {
+	UFCW_WL0	= 0x0000003F,
+	UFCW_WL1	= 0x00003F00,
+	UFCW_WL2	= 0x003F0000,
+	UFCW_WL3	= 0x3F000000,
+};
+
+/* UFCS */
+enum UFCS_BIT {
+	UFCS_SL0	= 0x0000003F,
+	UFCS_SL1	= 0x00003F00,
+	UFCS_SL2	= 0x003F0000,
+	UFCS_SL3	= 0x3F000000,
+};
+
+/* UFCV0/1/2/3/4 */
+enum UFCV_BIT {
+	UFCV_CV0	= 0x0000003F,
+	UFCV_CV1	= 0x00003F00,
+	UFCV_CV2	= 0x003F0000,
+	UFCV_CV3	= 0x3F000000,
+};
+
+/* UFCD0/1/2/3/4 */
+enum UFCD_BIT {
+	UFCD_DV0	= 0x0000003F,
+	UFCD_DV1	= 0x00003F00,
+	UFCD_DV2	= 0x003F0000,
+	UFCD_DV3	= 0x3F000000,
+};
+
+/* SFO */
+enum SFO_BIT {
+	SFO_FPB		= 0x0000003F,
+};
+
+/* RTC */
+enum RTC_BIT {
+	RTC_MFL0	= 0x00000FFF,
+	RTC_MFL1	= 0x0FFF0000,
+};
+
+/* TGC */
+enum TGC_BIT {
+	TGC_TSM0	= 0x00000001,
+	TGC_TSM1	= 0x00000002,
+	TGC_TSM2	= 0x00000004,
+	TGC_TSM3	= 0x00000008,
+	TGC_TQP		= 0x00000030,
+	TGC_TQP_NONAVB	= 0x00000000,
+	TGC_TQP_AVBMODE1 = 0x00000010,
+	TGC_TQP_AVBMODE2 = 0x00000030,
+	TGC_TBD0	= 0x00000300,
+	TGC_TBD1	= 0x00003000,
+	TGC_TBD2	= 0x00030000,
+	TGC_TBD3	= 0x00300000,
+};
+
+/* TCCR */
+enum TCCR_BIT {
+	TCCR_TSRQ0	= 0x00000001,
+	TCCR_TSRQ1	= 0x00000002,
+	TCCR_TSRQ2	= 0x00000004,
+	TCCR_TSRQ3	= 0x00000008,
+	TCCR_TFEN	= 0x00000100,
+	TCCR_TFR	= 0x00000200,
+};
+
+/* TSR */
+enum TSR_BIT {
+	TSR_CCS0	= 0x00000003,
+	TSR_CCS1	= 0x0000000C,
+	TSR_TFFL	= 0x00000700,
+};
+
+/* TFA2 */
+enum TFA2_BIT {
+	TFA2_TSV	= 0x0000FFFF,
+	TFA2_TST	= 0x03FF0000,
+};
+
+/* DIC */
+enum DIC_BIT {
+	DIC_DPE1	= 0x00000002,
+	DIC_DPE2	= 0x00000004,
+	DIC_DPE3	= 0x00000008,
+	DIC_DPE4	= 0x00000010,
+	DIC_DPE5	= 0x00000020,
+	DIC_DPE6	= 0x00000040,
+	DIC_DPE7	= 0x00000080,
+	DIC_DPE8	= 0x00000100,
+	DIC_DPE9	= 0x00000200,
+	DIC_DPE10	= 0x00000400,
+	DIC_DPE11	= 0x00000800,
+	DIC_DPE12	= 0x00001000,
+	DIC_DPE13	= 0x00002000,
+	DIC_DPE14	= 0x00004000,
+	DIC_DPE15	= 0x00008000,
+};
+
+/* DIS */
+enum DIS_BIT {
+	DIS_DPF1	= 0x00000002,
+	DIS_DPF2	= 0x00000004,
+	DIS_DPF3	= 0x00000008,
+	DIS_DPF4	= 0x00000010,
+	DIS_DPF5	= 0x00000020,
+	DIS_DPF6	= 0x00000040,
+	DIS_DPF7	= 0x00000080,
+	DIS_DPF8	= 0x00000100,
+	DIS_DPF9	= 0x00000200,
+	DIS_DPF10	= 0x00000400,
+	DIS_DPF11	= 0x00000800,
+	DIS_DPF12	= 0x00001000,
+	DIS_DPF13	= 0x00002000,
+	DIS_DPF14	= 0x00004000,
+	DIS_DPF15	= 0x00008000,
+};
+
+/* EIC */
+enum EIC_BIT {
+	EIC_MREE	= 0x00000001,
+	EIC_MTEE	= 0x00000002,
+	EIC_QEE		= 0x00000004,
+	EIC_SEE		= 0x00000008,
+	EIC_CLLE0	= 0x00000010,
+	EIC_CLLE1	= 0x00000020,
+	EIC_CULE0	= 0x00000040,
+	EIC_CULE1	= 0x00000080,
+	EIC_TFFE	= 0x00000100,
+};
+
+/* EIS */
+enum EIS_BIT {
+	EIS_MREF	= 0x00000001,
+	EIS_MTEF	= 0x00000002,
+	EIS_QEF		= 0x00000004,
+	EIS_SEF		= 0x00000008,
+	EIS_CLLF0	= 0x00000010,
+	EIS_CLLF1	= 0x00000020,
+	EIS_CULF0	= 0x00000040,
+	EIS_CULF1	= 0x00000080,
+	EIS_TFFF	= 0x00000100,
+	EIS_QFS		= 0x00010000,
+};
+
+/* RIC0 */
+enum RIC0_BIT {
+	RIC0_FRE0	= 0x00000001,
+	RIC0_FRE1	= 0x00000002,
+	RIC0_FRE2	= 0x00000004,
+	RIC0_FRE3	= 0x00000008,
+	RIC0_FRE4	= 0x00000010,
+	RIC0_FRE5	= 0x00000020,
+	RIC0_FRE6	= 0x00000040,
+	RIC0_FRE7	= 0x00000080,
+	RIC0_FRE8	= 0x00000100,
+	RIC0_FRE9	= 0x00000200,
+	RIC0_FRE10	= 0x00000400,
+	RIC0_FRE11	= 0x00000800,
+	RIC0_FRE12	= 0x00001000,
+	RIC0_FRE13	= 0x00002000,
+	RIC0_FRE14	= 0x00004000,
+	RIC0_FRE15	= 0x00008000,
+	RIC0_FRE16	= 0x00010000,
+	RIC0_FRE17	= 0x00020000,
+};
+
+/* RIC0 */
+enum RIS0_BIT {
+	RIS0_FRF0	= 0x00000001,
+	RIS0_FRF1	= 0x00000002,
+	RIS0_FRF2	= 0x00000004,
+	RIS0_FRF3	= 0x00000008,
+	RIS0_FRF4	= 0x00000010,
+	RIS0_FRF5	= 0x00000020,
+	RIS0_FRF6	= 0x00000040,
+	RIS0_FRF7	= 0x00000080,
+	RIS0_FRF8	= 0x00000100,
+	RIS0_FRF9	= 0x00000200,
+	RIS0_FRF10	= 0x00000400,
+	RIS0_FRF11	= 0x00000800,
+	RIS0_FRF12	= 0x00001000,
+	RIS0_FRF13	= 0x00002000,
+	RIS0_FRF14	= 0x00004000,
+	RIS0_FRF15	= 0x00008000,
+	RIS0_FRF16	= 0x00010000,
+	RIS0_FRF17	= 0x00020000,
+};
+
+/* RIC1 */
+enum RIC1_BIT {
+	RIC1_RFWE	= 0x80000000,
+};
+
+/* RIS1 */
+enum RIS1_BIT {
+	RIS1_RFWF	= 0x80000000,
+};
+
+/* RIC2 */
+enum RIC2_BIT {
+	RIC2_QFE0	= 0x00000001,
+	RIC2_QFE1	= 0x00000002,
+	RIC2_QFE2	= 0x00000004,
+	RIC2_QFE3	= 0x00000008,
+	RIC2_QFE4	= 0x00000010,
+	RIC2_QFE5	= 0x00000020,
+	RIC2_QFE6	= 0x00000040,
+	RIC2_QFE7	= 0x00000080,
+	RIC2_QFE8	= 0x00000100,
+	RIC2_QFE9	= 0x00000200,
+	RIC2_QFE10	= 0x00000400,
+	RIC2_QFE11	= 0x00000800,
+	RIC2_QFE12	= 0x00001000,
+	RIC2_QFE13	= 0x00002000,
+	RIC2_QFE14	= 0x00004000,
+	RIC2_QFE15	= 0x00008000,
+	RIC2_QFE16	= 0x00010000,
+	RIC2_QFE17	= 0x00020000,
+	RIC2_RFFE	= 0x80000000,
+};
+
+/* RIS2 */
+enum RIS2_BIT {
+	RIS2_QFF0	= 0x00000001,
+	RIS2_QFF1	= 0x00000002,
+	RIS2_QFF2	= 0x00000004,
+	RIS2_QFF3	= 0x00000008,
+	RIS2_QFF4	= 0x00000010,
+	RIS2_QFF5	= 0x00000020,
+	RIS2_QFF6	= 0x00000040,
+	RIS2_QFF7	= 0x00000080,
+	RIS2_QFF8	= 0x00000100,
+	RIS2_QFF9	= 0x00000200,
+	RIS2_QFF10	= 0x00000400,
+	RIS2_QFF11	= 0x00000800,
+	RIS2_QFF12	= 0x00001000,
+	RIS2_QFF13	= 0x00002000,
+	RIS2_QFF14	= 0x00004000,
+	RIS2_QFF15	= 0x00008000,
+	RIS2_QFF16	= 0x00010000,
+	RIS2_QFF17	= 0x00020000,
+	RIS2_RFFF	= 0x80000000,
+};
+
+/* TIC */
+enum TIC_BIT {
+	TIC_FTE0	= 0x00000001,	/* Undocumented? */
+	TIC_FTE1	= 0x00000002,	/* Undocumented? */
+	TIC_TFUE	= 0x00000100,
+	TIC_TFWE	= 0x00000200,
+};
+
+/* TIS */
+enum TIS_BIT {
+	TIS_FTF0	= 0x00000001,	/* Undocumented? */
+	TIS_FTF1	= 0x00000002,	/* Undocumented? */
+	TIS_TFUF	= 0x00000100,
+	TIS_TFWF	= 0x00000200,
+};
+
+/* ISS */
+enum ISS_BIT {
+	ISS_FRS		= 0x00000001,	/* Undocumented? */
+	ISS_FTS		= 0x00000004,	/* Undocumented? */
+	ISS_ES		= 0x00000040,
+	ISS_MS		= 0x00000080,
+	ISS_TFUS	= 0x00000100,
+	ISS_TFWS	= 0x00000200,
+	ISS_RFWS	= 0x00001000,
+	ISS_CGIS	= 0x00002000,
+	ISS_DPS1	= 0x00020000,
+	ISS_DPS2	= 0x00040000,
+	ISS_DPS3	= 0x00080000,
+	ISS_DPS4	= 0x00100000,
+	ISS_DPS5	= 0x00200000,
+	ISS_DPS6	= 0x00400000,
+	ISS_DPS7	= 0x00800000,
+	ISS_DPS8	= 0x01000000,
+	ISS_DPS9	= 0x02000000,
+	ISS_DPS10	= 0x04000000,
+	ISS_DPS11	= 0x08000000,
+	ISS_DPS12	= 0x10000000,
+	ISS_DPS13	= 0x20000000,
+	ISS_DPS14	= 0x40000000,
+	ISS_DPS15	= 0x80000000,
+};
+
+/* GCCR */
+enum GCCR_BIT {
+	GCCR_TCR	= 0x00000003,
+	GCCR_TCR_NOREQ	= 0x00000000, /* No request */
+	GCCR_TCR_RESET	= 0x00000001, /* gPTP/AVTP presentation timer reset */
+	GCCR_TCR_CAPTURE = 0x00000003, /* Capture value set in GCCR.TCSS */
+	GCCR_LTO	= 0x00000004,
+	GCCR_LTI	= 0x00000008,
+	GCCR_LPTC	= 0x00000010,
+	GCCR_LMTT	= 0x00000020,
+	GCCR_TCSS	= 0x00000300,
+	GCCR_TCSS_GPTP	= 0x00000000,	/* gPTP timer value */
+	GCCR_TCSS_ADJGPTP = 0x00000100, /* Adjusted gPTP timer value */
+	GCCR_TCSS_AVTP	= 0x00000200,	/* AVTP presentation time value */
+};
+
+/* GTI */
+enum GTI_BIT {
+	GTI_TIV		= 0x0FFFFFFF,
+};
+
+/* GIC */
+enum GIC_BIT {
+	GIC_PTCE	= 0x00000001,	/* Undocumented? */
+	GIC_PTME	= 0x00000004,
+};
+
+/* GIS */
+enum GIS_BIT {
+	GIS_PTCF	= 0x00000001,	/* Undocumented? */
+	GIS_PTMF	= 0x00000004,
+};
+
+/* ECMR */
+enum ECMR_BIT {
+	ECMR_PRM	= 0x00000001,
+	ECMR_DM		= 0x00000002,
+	ECMR_TE		= 0x00000020,
+	ECMR_RE		= 0x00000040,
+	ECMR_MPDE	= 0x00000200,
+	ECMR_TXF	= 0x00010000,	/* Undocumented? */
+	ECMR_RXF	= 0x00020000,
+	ECMR_PFR	= 0x00040000,
+	ECMR_ZPF	= 0x00080000,	/* Undocumented? */
+	ECMR_RZPF	= 0x00100000,
+	ECMR_DPAD	= 0x00200000,
+	ECMR_RCSC	= 0x00800000,
+	ECMR_TRCCM	= 0x04000000,
+};
+
+/* ECSR */
+enum ECSR_BIT {
+	ECSR_ICD	= 0x00000001,
+	ECSR_MPD	= 0x00000002,
+	ECSR_LCHNG	= 0x00000004,
+	ECSR_PHYI	= 0x00000008,
+};
+
+/* ECSIPR */
+enum ECSIPR_BIT {
+	ECSIPR_ICDIP	= 0x00000001,
+	ECSIPR_MPDIP	= 0x00000002,
+	ECSIPR_LCHNGIP	= 0x00000004,	/* Undocumented? */
+};
+
+/* PIR */
+enum PIR_BIT {
+	PIR_MDC		= 0x00000001,
+	PIR_MMD		= 0x00000002,
+	PIR_MDO		= 0x00000004,
+	PIR_MDI		= 0x00000008,
+};
+
+/* PSR */
+enum PSR_BIT {
+	PSR_LMON	= 0x00000001,
+};
+
+/* PIPR */
+enum PIPR_BIT {
+	PIPR_PHYIP	= 0x00000001,
+};
+
+/* MPR */
+enum MPR_BIT {
+	MPR_MP		= 0x0000ffff,
+};
+
+/* GECMR */
+enum GECMR_BIT {
+	GECMR_SPEED	= 0x00000001,
+	GECMR_SPEED_100	= 0x00000000,
+	GECMR_SPEED_1000 = 0x00000001,
+};
+
+/* The Ethernet AVB descriptor definitions. */
+struct ravb_desc {
+	__le16 ds;		/* Descriptor size */
+	u8 cc;		/* Content control MSBs (reserved) */
+	u8 die_dt;	/* Descriptor interrupt enable and type */
+	__le32 dptr;	/* Descriptor pointer */
+};
+
+enum DIE_DT {
+	/* Frame data */
+	DT_FMID		= 0x40,
+	DT_FSTART	= 0x50,
+	DT_FEND		= 0x60,
+	DT_FSINGLE	= 0x70,
+	/* Chain control */
+	DT_LINK		= 0x80,
+	DT_LINKFIX	= 0x90,
+	DT_EOS		= 0xa0,
+	/* HW/SW arbitration */
+	DT_FEMPTY	= 0xc0,
+	DT_FEMPTY_IS	= 0xd0,
+	DT_FEMPTY_IC	= 0xe0,
+	DT_FEMPTY_ND	= 0xf0,
+	DT_LEMPTY	= 0x20,
+	DT_EEMPTY	= 0x30,
+};
+
+struct ravb_rx_desc {
+	__le16 ds_cc;	/* Descriptor size and content control LSBs */
+	u8 msc;		/* MAC status code */
+	u8 die_dt;	/* Descriptor interrupt enable and type */
+	__le32 dptr;	/* Descpriptor pointer */
+};
+
+struct ravb_ex_rx_desc {
+	__le16 ds_cc;	/* Descriptor size and content control lower bits */
+	u8 msc;		/* MAC status code */
+	u8 die_dt;	/* Descriptor interrupt enable and type */
+	__le32 dptr;	/* Descpriptor pointer */
+	__le32 ts_n;	/* Timestampe nsec */
+	__le32 ts_sl;	/* Timestamp low */
+	__le16 ts_sh;	/* Timestamp high */
+	__le16 res;	/* Reserved bits */
+};
+
+enum RX_DS_CC_BIT {
+	RX_DS		= 0x0fff, /* Data size */
+	RX_TR		= 0x1000, /* Truncation indication */
+	RX_EI		= 0x2000, /* Error indication */
+	RX_PS		= 0xc000, /* Padding selection */
+};
+
+/* E-MAC status code */
+enum MSC_BIT {
+	MSC_CRC		= 0x01, /* Frame CRC error */
+	MSC_RFE		= 0x02, /* Frame reception error (flagged by PHY) */
+	MSC_RTSF	= 0x04, /* Frame length error (frame too short) */
+	MSC_RTLF	= 0x08, /* Frame length error (frame too long) */
+	MSC_FRE		= 0x10, /* Fraction error (not a multiple of 8 bits) */
+	MSC_CRL		= 0x20, /* Carrier lost */
+	MSC_CEEF	= 0x40, /* Carrier extension error */
+	MSC_MC		= 0x80, /* Multicast frame reception */
+};
+
+struct ravb_tx_desc {
+	__le16 ds_tagl;	/* Descriptor size and frame tag LSBs */
+	u8 tagh_tsr;	/* Frame tag MSBs and timestamp storage request bit */
+	u8 die_dt;	/* Descriptor interrupt enable and type */
+	__le32 dptr;	/* Descpriptor pointer */
+};
+
+enum TX_DS_TAGL_BIT {
+	TX_DS		= 0x0fff, /* Data size */
+	TX_TAGL		= 0xf000, /* Frame tag LSBs */
+};
+
+enum TX_TAGH_TSR_BIT {
+	TX_TAGH		= 0x3f, /* Frame tag MSBs */
+	TX_TSR		= 0x40, /* Timestamp storage request */
+};
+enum RAVB_QUEUE {
+	RAVB_BE = 0,	/* Best Effort Queue */
+	RAVB_NC,	/* Network Control Queue */
+};
+
+#define DBAT_ENTRY_NUM	22
+#define RX_QUEUE_OFFSET	4
+#define NUM_RX_QUEUE	2
+#define NUM_TX_QUEUE	2
+
+struct ravb_tstamp_skb {
+	struct list_head list;
+	struct sk_buff *skb;
+	u16 tag;
+};
+
+struct ravb_private {
+	struct net_device *ndev;
+	struct platform_device *pdev;
+	void __iomem *addr;
+	struct mdiobb_ctrl mdiobb;
+	u32 num_rx_ring[NUM_RX_QUEUE];
+	u32 num_tx_ring[NUM_TX_QUEUE];
+	u32 desc_bat_size;
+	dma_addr_t desc_bat_dma;
+	struct ravb_desc *desc_bat;
+	dma_addr_t rx_desc_dma[NUM_RX_QUEUE];
+	dma_addr_t tx_desc_dma[NUM_TX_QUEUE];
+	struct ravb_ex_rx_desc *rx_ring[NUM_RX_QUEUE];
+	struct ravb_tx_desc *tx_ring[NUM_TX_QUEUE];
+	struct sk_buff **rx_skb[NUM_RX_QUEUE];
+	struct sk_buff **tx_skb[NUM_TX_QUEUE];
+	void **tx_buffers[NUM_TX_QUEUE];
+	u32 rx_over_errors;
+	u32 rx_fifo_errors;
+	struct net_device_stats stats[NUM_RX_QUEUE];
+	u32 tstamp_tx_ctrl;
+	u32 tstamp_rx_ctrl;
+	struct list_head ts_skb_list;
+	u32 ts_skb_tag;
+	spinlock_t lock;		/* Register access lock */
+	u32 cur_rx[NUM_RX_QUEUE];	/* Consumer ring indices */
+	u32 dirty_rx[NUM_RX_QUEUE];	/* Producer ring indices */
+	u32 cur_tx[NUM_TX_QUEUE];
+	u32 dirty_tx[NUM_TX_QUEUE];
+	struct napi_struct napi;
+	struct work_struct work;
+	/* MII transceiver section. */
+	struct mii_bus *mii_bus;	/* MDIO bus control */
+	struct phy_device *phydev;	/* PHY device control */
+	int link;
+	phy_interface_t phy_interface;
+	int msg_enable;
+	int speed;
+	int duplex;
+
+	unsigned no_avb_link:1;
+	unsigned avb_link_active_low:1;
+};
+
+static inline u32 ravb_read(struct net_device *ndev, enum ravb_reg reg)
+{
+	struct ravb_private *priv = netdev_priv(ndev);
+
+	return ioread32(priv->addr + reg);
+}
+
+static inline void ravb_write(struct net_device *ndev, u32 data,
+			      enum ravb_reg reg)
+{
+	struct ravb_private *priv = netdev_priv(ndev);
+
+	iowrite32(data, priv->addr + reg);
+}
+
+#endif	/* #ifndef __RAVB_H__ */