Adding upstream version 6.1.76.upstream/6.1.76upstream

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

1 files changed, 5075 insertions, 0 deletions

diff --git a/drivers/net/usb/lan78xx.c b/drivers/net/usb/lan78xx.c
new file mode 100644
index 000000000..c458c030f
--- /dev/null
+++ b/drivers/net/usb/lan78xx.c
@@ -0,0 +1,5075 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2015 Microchip Technology
+ */
+#include <linux/module.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/ethtool.h>
+#include <linux/usb.h>
+#include <linux/crc32.h>
+#include <linux/signal.h>
+#include <linux/slab.h>
+#include <linux/if_vlan.h>
+#include <linux/uaccess.h>
+#include <linux/linkmode.h>
+#include <linux/list.h>
+#include <linux/ip.h>
+#include <linux/ipv6.h>
+#include <linux/mdio.h>
+#include <linux/phy.h>
+#include <net/ip6_checksum.h>
+#include <net/vxlan.h>
+#include <linux/interrupt.h>
+#include <linux/irqdomain.h>
+#include <linux/irq.h>
+#include <linux/irqchip/chained_irq.h>
+#include <linux/microchipphy.h>
+#include <linux/phy_fixed.h>
+#include <linux/of_mdio.h>
+#include <linux/of_net.h>
+#include "lan78xx.h"
+
+#define DRIVER_AUTHOR	"WOOJUNG HUH <woojung.huh@microchip.com>"
+#define DRIVER_DESC	"LAN78XX USB 3.0 Gigabit Ethernet Devices"
+#define DRIVER_NAME	"lan78xx"
+
+#define TX_TIMEOUT_JIFFIES		(5 * HZ)
+#define THROTTLE_JIFFIES		(HZ / 8)
+#define UNLINK_TIMEOUT_MS		3
+
+#define RX_MAX_QUEUE_MEMORY		(60 * 1518)
+
+#define SS_USB_PKT_SIZE			(1024)
+#define HS_USB_PKT_SIZE			(512)
+#define FS_USB_PKT_SIZE			(64)
+
+#define MAX_RX_FIFO_SIZE		(12 * 1024)
+#define MAX_TX_FIFO_SIZE		(12 * 1024)
+
+#define FLOW_THRESHOLD(n)		((((n) + 511) / 512) & 0x7F)
+#define FLOW_CTRL_THRESHOLD(on, off)	((FLOW_THRESHOLD(on)  << 0) | \
+					 (FLOW_THRESHOLD(off) << 8))
+
+/* Flow control turned on when Rx FIFO level rises above this level (bytes) */
+#define FLOW_ON_SS			9216
+#define FLOW_ON_HS			8704
+
+/* Flow control turned off when Rx FIFO level falls below this level (bytes) */
+#define FLOW_OFF_SS			4096
+#define FLOW_OFF_HS			1024
+
+#define DEFAULT_BURST_CAP_SIZE		(MAX_TX_FIFO_SIZE)
+#define DEFAULT_BULK_IN_DELAY		(0x0800)
+#define MAX_SINGLE_PACKET_SIZE		(9000)
+#define DEFAULT_TX_CSUM_ENABLE		(true)
+#define DEFAULT_RX_CSUM_ENABLE		(true)
+#define DEFAULT_TSO_CSUM_ENABLE		(true)
+#define DEFAULT_VLAN_FILTER_ENABLE	(true)
+#define DEFAULT_VLAN_RX_OFFLOAD		(true)
+#define TX_ALIGNMENT			(4)
+#define RXW_PADDING			2
+
+#define LAN78XX_USB_VENDOR_ID		(0x0424)
+#define LAN7800_USB_PRODUCT_ID		(0x7800)
+#define LAN7850_USB_PRODUCT_ID		(0x7850)
+#define LAN7801_USB_PRODUCT_ID		(0x7801)
+#define LAN78XX_EEPROM_MAGIC		(0x78A5)
+#define LAN78XX_OTP_MAGIC		(0x78F3)
+#define AT29M2AF_USB_VENDOR_ID		(0x07C9)
+#define AT29M2AF_USB_PRODUCT_ID	(0x0012)
+
+#define	MII_READ			1
+#define	MII_WRITE			0
+
+#define EEPROM_INDICATOR		(0xA5)
+#define EEPROM_MAC_OFFSET		(0x01)
+#define MAX_EEPROM_SIZE			512
+#define OTP_INDICATOR_1			(0xF3)
+#define OTP_INDICATOR_2			(0xF7)
+
+#define WAKE_ALL			(WAKE_PHY | WAKE_UCAST | \
+					 WAKE_MCAST | WAKE_BCAST | \
+					 WAKE_ARP | WAKE_MAGIC)
+
+#define TX_URB_NUM			10
+#define TX_SS_URB_NUM			TX_URB_NUM
+#define TX_HS_URB_NUM			TX_URB_NUM
+#define TX_FS_URB_NUM			TX_URB_NUM
+
+/* A single URB buffer must be large enough to hold a complete jumbo packet
+ */
+#define TX_SS_URB_SIZE			(32 * 1024)
+#define TX_HS_URB_SIZE			(16 * 1024)
+#define TX_FS_URB_SIZE			(10 * 1024)
+
+#define RX_SS_URB_NUM			30
+#define RX_HS_URB_NUM			10
+#define RX_FS_URB_NUM			10
+#define RX_SS_URB_SIZE			TX_SS_URB_SIZE
+#define RX_HS_URB_SIZE			TX_HS_URB_SIZE
+#define RX_FS_URB_SIZE			TX_FS_URB_SIZE
+
+#define SS_BURST_CAP_SIZE		RX_SS_URB_SIZE
+#define SS_BULK_IN_DELAY		0x2000
+#define HS_BURST_CAP_SIZE		RX_HS_URB_SIZE
+#define HS_BULK_IN_DELAY		0x2000
+#define FS_BURST_CAP_SIZE		RX_FS_URB_SIZE
+#define FS_BULK_IN_DELAY		0x2000
+
+#define TX_CMD_LEN			8
+#define TX_SKB_MIN_LEN			(TX_CMD_LEN + ETH_HLEN)
+#define LAN78XX_TSO_SIZE(dev)		((dev)->tx_urb_size - TX_SKB_MIN_LEN)
+
+#define RX_CMD_LEN			10
+#define RX_SKB_MIN_LEN			(RX_CMD_LEN + ETH_HLEN)
+#define RX_MAX_FRAME_LEN(mtu)		((mtu) + ETH_HLEN + VLAN_HLEN)
+
+/* USB related defines */
+#define BULK_IN_PIPE			1
+#define BULK_OUT_PIPE			2
+
+/* default autosuspend delay (mSec)*/
+#define DEFAULT_AUTOSUSPEND_DELAY	(10 * 1000)
+
+/* statistic update interval (mSec) */
+#define STAT_UPDATE_TIMER		(1 * 1000)
+
+/* time to wait for MAC or FCT to stop (jiffies) */
+#define HW_DISABLE_TIMEOUT		(HZ / 10)
+
+/* time to wait between polling MAC or FCT state (ms) */
+#define HW_DISABLE_DELAY_MS		1
+
+/* defines interrupts from interrupt EP */
+#define MAX_INT_EP			(32)
+#define INT_EP_INTEP			(31)
+#define INT_EP_OTP_WR_DONE		(28)
+#define INT_EP_EEE_TX_LPI_START		(26)
+#define INT_EP_EEE_TX_LPI_STOP		(25)
+#define INT_EP_EEE_RX_LPI		(24)
+#define INT_EP_MAC_RESET_TIMEOUT	(23)
+#define INT_EP_RDFO			(22)
+#define INT_EP_TXE			(21)
+#define INT_EP_USB_STATUS		(20)
+#define INT_EP_TX_DIS			(19)
+#define INT_EP_RX_DIS			(18)
+#define INT_EP_PHY			(17)
+#define INT_EP_DP			(16)
+#define INT_EP_MAC_ERR			(15)
+#define INT_EP_TDFU			(14)
+#define INT_EP_TDFO			(13)
+#define INT_EP_UTX			(12)
+#define INT_EP_GPIO_11			(11)
+#define INT_EP_GPIO_10			(10)
+#define INT_EP_GPIO_9			(9)
+#define INT_EP_GPIO_8			(8)
+#define INT_EP_GPIO_7			(7)
+#define INT_EP_GPIO_6			(6)
+#define INT_EP_GPIO_5			(5)
+#define INT_EP_GPIO_4			(4)
+#define INT_EP_GPIO_3			(3)
+#define INT_EP_GPIO_2			(2)
+#define INT_EP_GPIO_1			(1)
+#define INT_EP_GPIO_0			(0)
+
+static const char lan78xx_gstrings[][ETH_GSTRING_LEN] = {
+	"RX FCS Errors",
+	"RX Alignment Errors",
+	"Rx Fragment Errors",
+	"RX Jabber Errors",
+	"RX Undersize Frame Errors",
+	"RX Oversize Frame Errors",
+	"RX Dropped Frames",
+	"RX Unicast Byte Count",
+	"RX Broadcast Byte Count",
+	"RX Multicast Byte Count",
+	"RX Unicast Frames",
+	"RX Broadcast Frames",
+	"RX Multicast Frames",
+	"RX Pause Frames",
+	"RX 64 Byte Frames",
+	"RX 65 - 127 Byte Frames",
+	"RX 128 - 255 Byte Frames",
+	"RX 256 - 511 Bytes Frames",
+	"RX 512 - 1023 Byte Frames",
+	"RX 1024 - 1518 Byte Frames",
+	"RX Greater 1518 Byte Frames",
+	"EEE RX LPI Transitions",
+	"EEE RX LPI Time",
+	"TX FCS Errors",
+	"TX Excess Deferral Errors",
+	"TX Carrier Errors",
+	"TX Bad Byte Count",
+	"TX Single Collisions",
+	"TX Multiple Collisions",
+	"TX Excessive Collision",
+	"TX Late Collisions",
+	"TX Unicast Byte Count",
+	"TX Broadcast Byte Count",
+	"TX Multicast Byte Count",
+	"TX Unicast Frames",
+	"TX Broadcast Frames",
+	"TX Multicast Frames",
+	"TX Pause Frames",
+	"TX 64 Byte Frames",
+	"TX 65 - 127 Byte Frames",
+	"TX 128 - 255 Byte Frames",
+	"TX 256 - 511 Bytes Frames",
+	"TX 512 - 1023 Byte Frames",
+	"TX 1024 - 1518 Byte Frames",
+	"TX Greater 1518 Byte Frames",
+	"EEE TX LPI Transitions",
+	"EEE TX LPI Time",
+};
+
+struct lan78xx_statstage {
+	u32 rx_fcs_errors;
+	u32 rx_alignment_errors;
+	u32 rx_fragment_errors;
+	u32 rx_jabber_errors;
+	u32 rx_undersize_frame_errors;
+	u32 rx_oversize_frame_errors;
+	u32 rx_dropped_frames;
+	u32 rx_unicast_byte_count;
+	u32 rx_broadcast_byte_count;
+	u32 rx_multicast_byte_count;
+	u32 rx_unicast_frames;
+	u32 rx_broadcast_frames;
+	u32 rx_multicast_frames;
+	u32 rx_pause_frames;
+	u32 rx_64_byte_frames;
+	u32 rx_65_127_byte_frames;
+	u32 rx_128_255_byte_frames;
+	u32 rx_256_511_bytes_frames;
+	u32 rx_512_1023_byte_frames;
+	u32 rx_1024_1518_byte_frames;
+	u32 rx_greater_1518_byte_frames;
+	u32 eee_rx_lpi_transitions;
+	u32 eee_rx_lpi_time;
+	u32 tx_fcs_errors;
+	u32 tx_excess_deferral_errors;
+	u32 tx_carrier_errors;
+	u32 tx_bad_byte_count;
+	u32 tx_single_collisions;
+	u32 tx_multiple_collisions;
+	u32 tx_excessive_collision;
+	u32 tx_late_collisions;
+	u32 tx_unicast_byte_count;
+	u32 tx_broadcast_byte_count;
+	u32 tx_multicast_byte_count;
+	u32 tx_unicast_frames;
+	u32 tx_broadcast_frames;
+	u32 tx_multicast_frames;
+	u32 tx_pause_frames;
+	u32 tx_64_byte_frames;
+	u32 tx_65_127_byte_frames;
+	u32 tx_128_255_byte_frames;
+	u32 tx_256_511_bytes_frames;
+	u32 tx_512_1023_byte_frames;
+	u32 tx_1024_1518_byte_frames;
+	u32 tx_greater_1518_byte_frames;
+	u32 eee_tx_lpi_transitions;
+	u32 eee_tx_lpi_time;
+};
+
+struct lan78xx_statstage64 {
+	u64 rx_fcs_errors;
+	u64 rx_alignment_errors;
+	u64 rx_fragment_errors;
+	u64 rx_jabber_errors;
+	u64 rx_undersize_frame_errors;
+	u64 rx_oversize_frame_errors;
+	u64 rx_dropped_frames;
+	u64 rx_unicast_byte_count;
+	u64 rx_broadcast_byte_count;
+	u64 rx_multicast_byte_count;
+	u64 rx_unicast_frames;
+	u64 rx_broadcast_frames;
+	u64 rx_multicast_frames;
+	u64 rx_pause_frames;
+	u64 rx_64_byte_frames;
+	u64 rx_65_127_byte_frames;
+	u64 rx_128_255_byte_frames;
+	u64 rx_256_511_bytes_frames;
+	u64 rx_512_1023_byte_frames;
+	u64 rx_1024_1518_byte_frames;
+	u64 rx_greater_1518_byte_frames;
+	u64 eee_rx_lpi_transitions;
+	u64 eee_rx_lpi_time;
+	u64 tx_fcs_errors;
+	u64 tx_excess_deferral_errors;
+	u64 tx_carrier_errors;
+	u64 tx_bad_byte_count;
+	u64 tx_single_collisions;
+	u64 tx_multiple_collisions;
+	u64 tx_excessive_collision;
+	u64 tx_late_collisions;
+	u64 tx_unicast_byte_count;
+	u64 tx_broadcast_byte_count;
+	u64 tx_multicast_byte_count;
+	u64 tx_unicast_frames;
+	u64 tx_broadcast_frames;
+	u64 tx_multicast_frames;
+	u64 tx_pause_frames;
+	u64 tx_64_byte_frames;
+	u64 tx_65_127_byte_frames;
+	u64 tx_128_255_byte_frames;
+	u64 tx_256_511_bytes_frames;
+	u64 tx_512_1023_byte_frames;
+	u64 tx_1024_1518_byte_frames;
+	u64 tx_greater_1518_byte_frames;
+	u64 eee_tx_lpi_transitions;
+	u64 eee_tx_lpi_time;
+};
+
+static u32 lan78xx_regs[] = {
+	ID_REV,
+	INT_STS,
+	HW_CFG,
+	PMT_CTL,
+	E2P_CMD,
+	E2P_DATA,
+	USB_STATUS,
+	VLAN_TYPE,
+	MAC_CR,
+	MAC_RX,
+	MAC_TX,
+	FLOW,
+	ERR_STS,
+	MII_ACC,
+	MII_DATA,
+	EEE_TX_LPI_REQ_DLY,
+	EEE_TW_TX_SYS,
+	EEE_TX_LPI_REM_DLY,
+	WUCSR
+};
+
+#define PHY_REG_SIZE (32 * sizeof(u32))
+
+struct lan78xx_net;
+
+struct lan78xx_priv {
+	struct lan78xx_net *dev;
+	u32 rfe_ctl;
+	u32 mchash_table[DP_SEL_VHF_HASH_LEN]; /* multicast hash table */
+	u32 pfilter_table[NUM_OF_MAF][2]; /* perfect filter table */
+	u32 vlan_table[DP_SEL_VHF_VLAN_LEN];
+	struct mutex dataport_mutex; /* for dataport access */
+	spinlock_t rfe_ctl_lock; /* for rfe register access */
+	struct work_struct set_multicast;
+	struct work_struct set_vlan;
+	u32 wol;
+};
+
+enum skb_state {
+	illegal = 0,
+	tx_start,
+	tx_done,
+	rx_start,
+	rx_done,
+	rx_cleanup,
+	unlink_start
+};
+
+struct skb_data {		/* skb->cb is one of these */
+	struct urb *urb;
+	struct lan78xx_net *dev;
+	enum skb_state state;
+	size_t length;
+	int num_of_packet;
+};
+
+struct usb_context {
+	struct usb_ctrlrequest req;
+	struct lan78xx_net *dev;
+};
+
+#define EVENT_TX_HALT			0
+#define EVENT_RX_HALT			1
+#define EVENT_RX_MEMORY			2
+#define EVENT_STS_SPLIT			3
+#define EVENT_LINK_RESET		4
+#define EVENT_RX_PAUSED			5
+#define EVENT_DEV_WAKING		6
+#define EVENT_DEV_ASLEEP		7
+#define EVENT_DEV_OPEN			8
+#define EVENT_STAT_UPDATE		9
+#define EVENT_DEV_DISCONNECT		10
+
+struct statstage {
+	struct mutex			access_lock;	/* for stats access */
+	struct lan78xx_statstage	saved;
+	struct lan78xx_statstage	rollover_count;
+	struct lan78xx_statstage	rollover_max;
+	struct lan78xx_statstage64	curr_stat;
+};
+
+struct irq_domain_data {
+	struct irq_domain	*irqdomain;
+	unsigned int		phyirq;
+	struct irq_chip		*irqchip;
+	irq_flow_handler_t	irq_handler;
+	u32			irqenable;
+	struct mutex		irq_lock;		/* for irq bus access */
+};
+
+struct lan78xx_net {
+	struct net_device	*net;
+	struct usb_device	*udev;
+	struct usb_interface	*intf;
+	void			*driver_priv;
+
+	unsigned int		tx_pend_data_len;
+	size_t			n_tx_urbs;
+	size_t			n_rx_urbs;
+	size_t			tx_urb_size;
+	size_t			rx_urb_size;
+
+	struct sk_buff_head	rxq_free;
+	struct sk_buff_head	rxq;
+	struct sk_buff_head	rxq_done;
+	struct sk_buff_head	rxq_overflow;
+	struct sk_buff_head	txq_free;
+	struct sk_buff_head	txq;
+	struct sk_buff_head	txq_pend;
+
+	struct napi_struct	napi;
+
+	struct delayed_work	wq;
+
+	int			msg_enable;
+
+	struct urb		*urb_intr;
+	struct usb_anchor	deferred;
+
+	struct mutex		dev_mutex; /* serialise open/stop wrt suspend/resume */
+	struct mutex		phy_mutex; /* for phy access */
+	unsigned int		pipe_in, pipe_out, pipe_intr;
+
+	unsigned int		bulk_in_delay;
+	unsigned int		burst_cap;
+
+	unsigned long		flags;
+
+	wait_queue_head_t	*wait;
+	unsigned char		suspend_count;
+
+	unsigned int		maxpacket;
+	struct timer_list	stat_monitor;
+
+	unsigned long		data[5];
+
+	int			link_on;
+	u8			mdix_ctrl;
+
+	u32			chipid;
+	u32			chiprev;
+	struct mii_bus		*mdiobus;
+	phy_interface_t		interface;
+
+	int			fc_autoneg;
+	u8			fc_request_control;
+
+	int			delta;
+	struct statstage	stats;
+
+	struct irq_domain_data	domain_data;
+};
+
+/* define external phy id */
+#define	PHY_LAN8835			(0x0007C130)
+#define	PHY_KSZ9031RNX			(0x00221620)
+
+/* use ethtool to change the level for any given device */
+static int msg_level = -1;
+module_param(msg_level, int, 0);
+MODULE_PARM_DESC(msg_level, "Override default message level");
+
+static struct sk_buff *lan78xx_get_buf(struct sk_buff_head *buf_pool)
+{
+	if (skb_queue_empty(buf_pool))
+		return NULL;
+
+	return skb_dequeue(buf_pool);
+}
+
+static void lan78xx_release_buf(struct sk_buff_head *buf_pool,
+				struct sk_buff *buf)
+{
+	buf->data = buf->head;
+	skb_reset_tail_pointer(buf);
+
+	buf->len = 0;
+	buf->data_len = 0;
+
+	skb_queue_tail(buf_pool, buf);
+}
+
+static void lan78xx_free_buf_pool(struct sk_buff_head *buf_pool)
+{
+	struct skb_data *entry;
+	struct sk_buff *buf;
+
+	while (!skb_queue_empty(buf_pool)) {
+		buf = skb_dequeue(buf_pool);
+		if (buf) {
+			entry = (struct skb_data *)buf->cb;
+			usb_free_urb(entry->urb);
+			dev_kfree_skb_any(buf);
+		}
+	}
+}
+
+static int lan78xx_alloc_buf_pool(struct sk_buff_head *buf_pool,
+				  size_t n_urbs, size_t urb_size,
+				  struct lan78xx_net *dev)
+{
+	struct skb_data *entry;
+	struct sk_buff *buf;
+	struct urb *urb;
+	int i;
+
+	skb_queue_head_init(buf_pool);
+
+	for (i = 0; i < n_urbs; i++) {
+		buf = alloc_skb(urb_size, GFP_ATOMIC);
+		if (!buf)
+			goto error;
+
+		if (skb_linearize(buf) != 0) {
+			dev_kfree_skb_any(buf);
+			goto error;
+		}
+
+		urb = usb_alloc_urb(0, GFP_ATOMIC);
+		if (!urb) {
+			dev_kfree_skb_any(buf);
+			goto error;
+		}
+
+		entry = (struct skb_data *)buf->cb;
+		entry->urb = urb;
+		entry->dev = dev;
+		entry->length = 0;
+		entry->num_of_packet = 0;
+
+		skb_queue_tail(buf_pool, buf);
+	}
+
+	return 0;
+
+error:
+	lan78xx_free_buf_pool(buf_pool);
+
+	return -ENOMEM;
+}
+
+static struct sk_buff *lan78xx_get_rx_buf(struct lan78xx_net *dev)
+{
+	return lan78xx_get_buf(&dev->rxq_free);
+}
+
+static void lan78xx_release_rx_buf(struct lan78xx_net *dev,
+				   struct sk_buff *rx_buf)
+{
+	lan78xx_release_buf(&dev->rxq_free, rx_buf);
+}
+
+static void lan78xx_free_rx_resources(struct lan78xx_net *dev)
+{
+	lan78xx_free_buf_pool(&dev->rxq_free);
+}
+
+static int lan78xx_alloc_rx_resources(struct lan78xx_net *dev)
+{
+	return lan78xx_alloc_buf_pool(&dev->rxq_free,
+				      dev->n_rx_urbs, dev->rx_urb_size, dev);
+}
+
+static struct sk_buff *lan78xx_get_tx_buf(struct lan78xx_net *dev)
+{
+	return lan78xx_get_buf(&dev->txq_free);
+}
+
+static void lan78xx_release_tx_buf(struct lan78xx_net *dev,
+				   struct sk_buff *tx_buf)
+{
+	lan78xx_release_buf(&dev->txq_free, tx_buf);
+}
+
+static void lan78xx_free_tx_resources(struct lan78xx_net *dev)
+{
+	lan78xx_free_buf_pool(&dev->txq_free);
+}
+
+static int lan78xx_alloc_tx_resources(struct lan78xx_net *dev)
+{
+	return lan78xx_alloc_buf_pool(&dev->txq_free,
+				      dev->n_tx_urbs, dev->tx_urb_size, dev);
+}
+
+static int lan78xx_read_reg(struct lan78xx_net *dev, u32 index, u32 *data)
+{
+	u32 *buf;
+	int ret;
+
+	if (test_bit(EVENT_DEV_DISCONNECT, &dev->flags))
+		return -ENODEV;
+
+	buf = kmalloc(sizeof(u32), GFP_KERNEL);
+	if (!buf)
+		return -ENOMEM;
+
+	ret = usb_control_msg(dev->udev, usb_rcvctrlpipe(dev->udev, 0),
+			      USB_VENDOR_REQUEST_READ_REGISTER,
+			      USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
+			      0, index, buf, 4, USB_CTRL_GET_TIMEOUT);
+	if (likely(ret >= 0)) {
+		le32_to_cpus(buf);
+		*data = *buf;
+	} else if (net_ratelimit()) {
+		netdev_warn(dev->net,
+			    "Failed to read register index 0x%08x. ret = %d",
+			    index, ret);
+	}
+
+	kfree(buf);
+
+	return ret;
+}
+
+static int lan78xx_write_reg(struct lan78xx_net *dev, u32 index, u32 data)
+{
+	u32 *buf;
+	int ret;
+
+	if (test_bit(EVENT_DEV_DISCONNECT, &dev->flags))
+		return -ENODEV;
+
+	buf = kmalloc(sizeof(u32), GFP_KERNEL);
+	if (!buf)
+		return -ENOMEM;
+
+	*buf = data;
+	cpu_to_le32s(buf);
+
+	ret = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0),
+			      USB_VENDOR_REQUEST_WRITE_REGISTER,
+			      USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
+			      0, index, buf, 4, USB_CTRL_SET_TIMEOUT);
+	if (unlikely(ret < 0) &&
+	    net_ratelimit()) {
+		netdev_warn(dev->net,
+			    "Failed to write register index 0x%08x. ret = %d",
+			    index, ret);
+	}
+
+	kfree(buf);
+
+	return ret;
+}
+
+static int lan78xx_update_reg(struct lan78xx_net *dev, u32 reg, u32 mask,
+			      u32 data)
+{
+	int ret;
+	u32 buf;
+
+	ret = lan78xx_read_reg(dev, reg, &buf);
+	if (ret < 0)
+		return ret;
+
+	buf &= ~mask;
+	buf |= (mask & data);
+
+	ret = lan78xx_write_reg(dev, reg, buf);
+	if (ret < 0)
+		return ret;
+
+	return 0;
+}
+
+static int lan78xx_read_stats(struct lan78xx_net *dev,
+			      struct lan78xx_statstage *data)
+{
+	int ret = 0;
+	int i;
+	struct lan78xx_statstage *stats;
+	u32 *src;
+	u32 *dst;
+
+	stats = kmalloc(sizeof(*stats), GFP_KERNEL);
+	if (!stats)
+		return -ENOMEM;
+
+	ret = usb_control_msg(dev->udev,
+			      usb_rcvctrlpipe(dev->udev, 0),
+			      USB_VENDOR_REQUEST_GET_STATS,
+			      USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
+			      0,
+			      0,
+			      (void *)stats,
+			      sizeof(*stats),
+			      USB_CTRL_SET_TIMEOUT);
+	if (likely(ret >= 0)) {
+		src = (u32 *)stats;
+		dst = (u32 *)data;
+		for (i = 0; i < sizeof(*stats) / sizeof(u32); i++) {
+			le32_to_cpus(&src[i]);
+			dst[i] = src[i];
+		}
+	} else {
+		netdev_warn(dev->net,
+			    "Failed to read stat ret = %d", ret);
+	}
+
+	kfree(stats);
+
+	return ret;
+}
+
+#define check_counter_rollover(struct1, dev_stats, member)		\
+	do {								\
+		if ((struct1)->member < (dev_stats).saved.member)	\
+			(dev_stats).rollover_count.member++;		\
+	} while (0)
+
+static void lan78xx_check_stat_rollover(struct lan78xx_net *dev,
+					struct lan78xx_statstage *stats)
+{
+	check_counter_rollover(stats, dev->stats, rx_fcs_errors);
+	check_counter_rollover(stats, dev->stats, rx_alignment_errors);
+	check_counter_rollover(stats, dev->stats, rx_fragment_errors);
+	check_counter_rollover(stats, dev->stats, rx_jabber_errors);
+	check_counter_rollover(stats, dev->stats, rx_undersize_frame_errors);
+	check_counter_rollover(stats, dev->stats, rx_oversize_frame_errors);
+	check_counter_rollover(stats, dev->stats, rx_dropped_frames);
+	check_counter_rollover(stats, dev->stats, rx_unicast_byte_count);
+	check_counter_rollover(stats, dev->stats, rx_broadcast_byte_count);
+	check_counter_rollover(stats, dev->stats, rx_multicast_byte_count);
+	check_counter_rollover(stats, dev->stats, rx_unicast_frames);
+	check_counter_rollover(stats, dev->stats, rx_broadcast_frames);
+	check_counter_rollover(stats, dev->stats, rx_multicast_frames);
+	check_counter_rollover(stats, dev->stats, rx_pause_frames);
+	check_counter_rollover(stats, dev->stats, rx_64_byte_frames);
+	check_counter_rollover(stats, dev->stats, rx_65_127_byte_frames);
+	check_counter_rollover(stats, dev->stats, rx_128_255_byte_frames);
+	check_counter_rollover(stats, dev->stats, rx_256_511_bytes_frames);
+	check_counter_rollover(stats, dev->stats, rx_512_1023_byte_frames);
+	check_counter_rollover(stats, dev->stats, rx_1024_1518_byte_frames);
+	check_counter_rollover(stats, dev->stats, rx_greater_1518_byte_frames);
+	check_counter_rollover(stats, dev->stats, eee_rx_lpi_transitions);
+	check_counter_rollover(stats, dev->stats, eee_rx_lpi_time);
+	check_counter_rollover(stats, dev->stats, tx_fcs_errors);
+	check_counter_rollover(stats, dev->stats, tx_excess_deferral_errors);
+	check_counter_rollover(stats, dev->stats, tx_carrier_errors);
+	check_counter_rollover(stats, dev->stats, tx_bad_byte_count);
+	check_counter_rollover(stats, dev->stats, tx_single_collisions);
+	check_counter_rollover(stats, dev->stats, tx_multiple_collisions);
+	check_counter_rollover(stats, dev->stats, tx_excessive_collision);
+	check_counter_rollover(stats, dev->stats, tx_late_collisions);
+	check_counter_rollover(stats, dev->stats, tx_unicast_byte_count);
+	check_counter_rollover(stats, dev->stats, tx_broadcast_byte_count);
+	check_counter_rollover(stats, dev->stats, tx_multicast_byte_count);
+	check_counter_rollover(stats, dev->stats, tx_unicast_frames);
+	check_counter_rollover(stats, dev->stats, tx_broadcast_frames);
+	check_counter_rollover(stats, dev->stats, tx_multicast_frames);
+	check_counter_rollover(stats, dev->stats, tx_pause_frames);
+	check_counter_rollover(stats, dev->stats, tx_64_byte_frames);
+	check_counter_rollover(stats, dev->stats, tx_65_127_byte_frames);
+	check_counter_rollover(stats, dev->stats, tx_128_255_byte_frames);
+	check_counter_rollover(stats, dev->stats, tx_256_511_bytes_frames);
+	check_counter_rollover(stats, dev->stats, tx_512_1023_byte_frames);
+	check_counter_rollover(stats, dev->stats, tx_1024_1518_byte_frames);
+	check_counter_rollover(stats, dev->stats, tx_greater_1518_byte_frames);
+	check_counter_rollover(stats, dev->stats, eee_tx_lpi_transitions);
+	check_counter_rollover(stats, dev->stats, eee_tx_lpi_time);
+
+	memcpy(&dev->stats.saved, stats, sizeof(struct lan78xx_statstage));
+}
+
+static void lan78xx_update_stats(struct lan78xx_net *dev)
+{
+	u32 *p, *count, *max;
+	u64 *data;
+	int i;
+	struct lan78xx_statstage lan78xx_stats;
+
+	if (usb_autopm_get_interface(dev->intf) < 0)
+		return;
+
+	p = (u32 *)&lan78xx_stats;
+	count = (u32 *)&dev->stats.rollover_count;
+	max = (u32 *)&dev->stats.rollover_max;
+	data = (u64 *)&dev->stats.curr_stat;
+
+	mutex_lock(&dev->stats.access_lock);
+
+	if (lan78xx_read_stats(dev, &lan78xx_stats) > 0)
+		lan78xx_check_stat_rollover(dev, &lan78xx_stats);
+
+	for (i = 0; i < (sizeof(lan78xx_stats) / (sizeof(u32))); i++)
+		data[i] = (u64)p[i] + ((u64)count[i] * ((u64)max[i] + 1));
+
+	mutex_unlock(&dev->stats.access_lock);
+
+	usb_autopm_put_interface(dev->intf);
+}
+
+/* Loop until the read is completed with timeout called with phy_mutex held */
+static int lan78xx_phy_wait_not_busy(struct lan78xx_net *dev)
+{
+	unsigned long start_time = jiffies;
+	u32 val;
+	int ret;
+
+	do {
+		ret = lan78xx_read_reg(dev, MII_ACC, &val);
+		if (unlikely(ret < 0))
+			return -EIO;
+
+		if (!(val & MII_ACC_MII_BUSY_))
+			return 0;
+	} while (!time_after(jiffies, start_time + HZ));
+
+	return -EIO;
+}
+
+static inline u32 mii_access(int id, int index, int read)
+{
+	u32 ret;
+
+	ret = ((u32)id << MII_ACC_PHY_ADDR_SHIFT_) & MII_ACC_PHY_ADDR_MASK_;
+	ret |= ((u32)index << MII_ACC_MIIRINDA_SHIFT_) & MII_ACC_MIIRINDA_MASK_;
+	if (read)
+		ret |= MII_ACC_MII_READ_;
+	else
+		ret |= MII_ACC_MII_WRITE_;
+	ret |= MII_ACC_MII_BUSY_;
+
+	return ret;
+}
+
+static int lan78xx_wait_eeprom(struct lan78xx_net *dev)
+{
+	unsigned long start_time = jiffies;
+	u32 val;
+	int ret;
+
+	do {
+		ret = lan78xx_read_reg(dev, E2P_CMD, &val);
+		if (unlikely(ret < 0))
+			return -EIO;
+
+		if (!(val & E2P_CMD_EPC_BUSY_) ||
+		    (val & E2P_CMD_EPC_TIMEOUT_))
+			break;
+		usleep_range(40, 100);
+	} while (!time_after(jiffies, start_time + HZ));
+
+	if (val & (E2P_CMD_EPC_TIMEOUT_ | E2P_CMD_EPC_BUSY_)) {
+		netdev_warn(dev->net, "EEPROM read operation timeout");
+		return -EIO;
+	}
+
+	return 0;
+}
+
+static int lan78xx_eeprom_confirm_not_busy(struct lan78xx_net *dev)
+{
+	unsigned long start_time = jiffies;
+	u32 val;
+	int ret;
+
+	do {
+		ret = lan78xx_read_reg(dev, E2P_CMD, &val);
+		if (unlikely(ret < 0))
+			return -EIO;
+
+		if (!(val & E2P_CMD_EPC_BUSY_))
+			return 0;
+
+		usleep_range(40, 100);
+	} while (!time_after(jiffies, start_time + HZ));
+
+	netdev_warn(dev->net, "EEPROM is busy");
+	return -EIO;
+}
+
+static int lan78xx_read_raw_eeprom(struct lan78xx_net *dev, u32 offset,
+				   u32 length, u8 *data)
+{
+	u32 val;
+	u32 saved;
+	int i, ret;
+	int retval;
+
+	/* depends on chip, some EEPROM pins are muxed with LED function.
+	 * disable & restore LED function to access EEPROM.
+	 */
+	ret = lan78xx_read_reg(dev, HW_CFG, &val);
+	saved = val;
+	if (dev->chipid == ID_REV_CHIP_ID_7800_) {
+		val &= ~(HW_CFG_LED1_EN_ | HW_CFG_LED0_EN_);
+		ret = lan78xx_write_reg(dev, HW_CFG, val);
+	}
+
+	retval = lan78xx_eeprom_confirm_not_busy(dev);
+	if (retval)
+		return retval;
+
+	for (i = 0; i < length; i++) {
+		val = E2P_CMD_EPC_BUSY_ | E2P_CMD_EPC_CMD_READ_;
+		val |= (offset & E2P_CMD_EPC_ADDR_MASK_);
+		ret = lan78xx_write_reg(dev, E2P_CMD, val);
+		if (unlikely(ret < 0)) {
+			retval = -EIO;
+			goto exit;
+		}
+
+		retval = lan78xx_wait_eeprom(dev);
+		if (retval < 0)
+			goto exit;
+
+		ret = lan78xx_read_reg(dev, E2P_DATA, &val);
+		if (unlikely(ret < 0)) {
+			retval = -EIO;
+			goto exit;
+		}
+
+		data[i] = val & 0xFF;
+		offset++;
+	}
+
+	retval = 0;
+exit:
+	if (dev->chipid == ID_REV_CHIP_ID_7800_)
+		ret = lan78xx_write_reg(dev, HW_CFG, saved);
+
+	return retval;
+}
+
+static int lan78xx_read_eeprom(struct lan78xx_net *dev, u32 offset,
+			       u32 length, u8 *data)
+{
+	u8 sig;
+	int ret;
+
+	ret = lan78xx_read_raw_eeprom(dev, 0, 1, &sig);
+	if ((ret == 0) && (sig == EEPROM_INDICATOR))
+		ret = lan78xx_read_raw_eeprom(dev, offset, length, data);
+	else
+		ret = -EINVAL;
+
+	return ret;
+}
+
+static int lan78xx_write_raw_eeprom(struct lan78xx_net *dev, u32 offset,
+				    u32 length, u8 *data)
+{
+	u32 val;
+	u32 saved;
+	int i, ret;
+	int retval;
+
+	/* depends on chip, some EEPROM pins are muxed with LED function.
+	 * disable & restore LED function to access EEPROM.
+	 */
+	ret = lan78xx_read_reg(dev, HW_CFG, &val);
+	saved = val;
+	if (dev->chipid == ID_REV_CHIP_ID_7800_) {
+		val &= ~(HW_CFG_LED1_EN_ | HW_CFG_LED0_EN_);
+		ret = lan78xx_write_reg(dev, HW_CFG, val);
+	}
+
+	retval = lan78xx_eeprom_confirm_not_busy(dev);
+	if (retval)
+		goto exit;
+
+	/* Issue write/erase enable command */
+	val = E2P_CMD_EPC_BUSY_ | E2P_CMD_EPC_CMD_EWEN_;
+	ret = lan78xx_write_reg(dev, E2P_CMD, val);
+	if (unlikely(ret < 0)) {
+		retval = -EIO;
+		goto exit;
+	}
+
+	retval = lan78xx_wait_eeprom(dev);
+	if (retval < 0)
+		goto exit;
+
+	for (i = 0; i < length; i++) {
+		/* Fill data register */
+		val = data[i];
+		ret = lan78xx_write_reg(dev, E2P_DATA, val);
+		if (ret < 0) {
+			retval = -EIO;
+			goto exit;
+		}
+
+		/* Send "write" command */
+		val = E2P_CMD_EPC_BUSY_ | E2P_CMD_EPC_CMD_WRITE_;
+		val |= (offset & E2P_CMD_EPC_ADDR_MASK_);
+		ret = lan78xx_write_reg(dev, E2P_CMD, val);
+		if (ret < 0) {
+			retval = -EIO;
+			goto exit;
+		}
+
+		retval = lan78xx_wait_eeprom(dev);
+		if (retval < 0)
+			goto exit;
+
+		offset++;
+	}
+
+	retval = 0;
+exit:
+	if (dev->chipid == ID_REV_CHIP_ID_7800_)
+		ret = lan78xx_write_reg(dev, HW_CFG, saved);
+
+	return retval;
+}
+
+static int lan78xx_read_raw_otp(struct lan78xx_net *dev, u32 offset,
+				u32 length, u8 *data)
+{
+	int i;
+	u32 buf;
+	unsigned long timeout;
+
+	lan78xx_read_reg(dev, OTP_PWR_DN, &buf);
+
+	if (buf & OTP_PWR_DN_PWRDN_N_) {
+		/* clear it and wait to be cleared */
+		lan78xx_write_reg(dev, OTP_PWR_DN, 0);
+
+		timeout = jiffies + HZ;
+		do {
+			usleep_range(1, 10);
+			lan78xx_read_reg(dev, OTP_PWR_DN, &buf);
+			if (time_after(jiffies, timeout)) {
+				netdev_warn(dev->net,
+					    "timeout on OTP_PWR_DN");
+				return -EIO;
+			}
+		} while (buf & OTP_PWR_DN_PWRDN_N_);
+	}
+
+	for (i = 0; i < length; i++) {
+		lan78xx_write_reg(dev, OTP_ADDR1,
+				  ((offset + i) >> 8) & OTP_ADDR1_15_11);
+		lan78xx_write_reg(dev, OTP_ADDR2,
+				  ((offset + i) & OTP_ADDR2_10_3));
+
+		lan78xx_write_reg(dev, OTP_FUNC_CMD, OTP_FUNC_CMD_READ_);
+		lan78xx_write_reg(dev, OTP_CMD_GO, OTP_CMD_GO_GO_);
+
+		timeout = jiffies + HZ;
+		do {
+			udelay(1);
+			lan78xx_read_reg(dev, OTP_STATUS, &buf);
+			if (time_after(jiffies, timeout)) {
+				netdev_warn(dev->net,
+					    "timeout on OTP_STATUS");
+				return -EIO;
+			}
+		} while (buf & OTP_STATUS_BUSY_);
+
+		lan78xx_read_reg(dev, OTP_RD_DATA, &buf);
+
+		data[i] = (u8)(buf & 0xFF);
+	}
+
+	return 0;
+}
+
+static int lan78xx_write_raw_otp(struct lan78xx_net *dev, u32 offset,
+				 u32 length, u8 *data)
+{
+	int i;
+	u32 buf;
+	unsigned long timeout;
+
+	lan78xx_read_reg(dev, OTP_PWR_DN, &buf);
+
+	if (buf & OTP_PWR_DN_PWRDN_N_) {
+		/* clear it and wait to be cleared */
+		lan78xx_write_reg(dev, OTP_PWR_DN, 0);
+
+		timeout = jiffies + HZ;
+		do {
+			udelay(1);
+			lan78xx_read_reg(dev, OTP_PWR_DN, &buf);
+			if (time_after(jiffies, timeout)) {
+				netdev_warn(dev->net,
+					    "timeout on OTP_PWR_DN completion");
+				return -EIO;
+			}
+		} while (buf & OTP_PWR_DN_PWRDN_N_);
+	}
+
+	/* set to BYTE program mode */
+	lan78xx_write_reg(dev, OTP_PRGM_MODE, OTP_PRGM_MODE_BYTE_);
+
+	for (i = 0; i < length; i++) {
+		lan78xx_write_reg(dev, OTP_ADDR1,
+				  ((offset + i) >> 8) & OTP_ADDR1_15_11);
+		lan78xx_write_reg(dev, OTP_ADDR2,
+				  ((offset + i) & OTP_ADDR2_10_3));
+		lan78xx_write_reg(dev, OTP_PRGM_DATA, data[i]);
+		lan78xx_write_reg(dev, OTP_TST_CMD, OTP_TST_CMD_PRGVRFY_);
+		lan78xx_write_reg(dev, OTP_CMD_GO, OTP_CMD_GO_GO_);
+
+		timeout = jiffies + HZ;
+		do {
+			udelay(1);
+			lan78xx_read_reg(dev, OTP_STATUS, &buf);
+			if (time_after(jiffies, timeout)) {
+				netdev_warn(dev->net,
+					    "Timeout on OTP_STATUS completion");
+				return -EIO;
+			}
+		} while (buf & OTP_STATUS_BUSY_);
+	}
+
+	return 0;
+}
+
+static int lan78xx_read_otp(struct lan78xx_net *dev, u32 offset,
+			    u32 length, u8 *data)
+{
+	u8 sig;
+	int ret;
+
+	ret = lan78xx_read_raw_otp(dev, 0, 1, &sig);
+
+	if (ret == 0) {
+		if (sig == OTP_INDICATOR_2)
+			offset += 0x100;
+		else if (sig != OTP_INDICATOR_1)
+			ret = -EINVAL;
+		if (!ret)
+			ret = lan78xx_read_raw_otp(dev, offset, length, data);
+	}
+
+	return ret;
+}
+
+static int lan78xx_dataport_wait_not_busy(struct lan78xx_net *dev)
+{
+	int i, ret;
+
+	for (i = 0; i < 100; i++) {
+		u32 dp_sel;
+
+		ret = lan78xx_read_reg(dev, DP_SEL, &dp_sel);
+		if (unlikely(ret < 0))
+			return -EIO;
+
+		if (dp_sel & DP_SEL_DPRDY_)
+			return 0;
+
+		usleep_range(40, 100);
+	}
+
+	netdev_warn(dev->net, "%s timed out", __func__);
+
+	return -EIO;
+}
+
+static int lan78xx_dataport_write(struct lan78xx_net *dev, u32 ram_select,
+				  u32 addr, u32 length, u32 *buf)
+{
+	struct lan78xx_priv *pdata = (struct lan78xx_priv *)(dev->data[0]);
+	u32 dp_sel;
+	int i, ret;
+
+	if (usb_autopm_get_interface(dev->intf) < 0)
+		return 0;
+
+	mutex_lock(&pdata->dataport_mutex);
+
+	ret = lan78xx_dataport_wait_not_busy(dev);
+	if (ret < 0)
+		goto done;
+
+	ret = lan78xx_read_reg(dev, DP_SEL, &dp_sel);
+
+	dp_sel &= ~DP_SEL_RSEL_MASK_;
+	dp_sel |= ram_select;
+	ret = lan78xx_write_reg(dev, DP_SEL, dp_sel);
+
+	for (i = 0; i < length; i++) {
+		ret = lan78xx_write_reg(dev, DP_ADDR, addr + i);
+
+		ret = lan78xx_write_reg(dev, DP_DATA, buf[i]);
+
+		ret = lan78xx_write_reg(dev, DP_CMD, DP_CMD_WRITE_);
+
+		ret = lan78xx_dataport_wait_not_busy(dev);
+		if (ret < 0)
+			goto done;
+	}
+
+done:
+	mutex_unlock(&pdata->dataport_mutex);
+	usb_autopm_put_interface(dev->intf);
+
+	return ret;
+}
+
+static void lan78xx_set_addr_filter(struct lan78xx_priv *pdata,
+				    int index, u8 addr[ETH_ALEN])
+{
+	u32 temp;
+
+	if ((pdata) && (index > 0) && (index < NUM_OF_MAF)) {
+		temp = addr[3];
+		temp = addr[2] | (temp << 8);
+		temp = addr[1] | (temp << 8);
+		temp = addr[0] | (temp << 8);
+		pdata->pfilter_table[index][1] = temp;
+		temp = addr[5];
+		temp = addr[4] | (temp << 8);
+		temp |= MAF_HI_VALID_ | MAF_HI_TYPE_DST_;
+		pdata->pfilter_table[index][0] = temp;
+	}
+}
+
+/* returns hash bit number for given MAC address */
+static inline u32 lan78xx_hash(char addr[ETH_ALEN])
+{
+	return (ether_crc(ETH_ALEN, addr) >> 23) & 0x1ff;
+}
+
+static void lan78xx_deferred_multicast_write(struct work_struct *param)
+{
+	struct lan78xx_priv *pdata =
+			container_of(param, struct lan78xx_priv, set_multicast);
+	struct lan78xx_net *dev = pdata->dev;
+	int i;
+
+	netif_dbg(dev, drv, dev->net, "deferred multicast write 0x%08x\n",
+		  pdata->rfe_ctl);
+
+	lan78xx_dataport_write(dev, DP_SEL_RSEL_VLAN_DA_, DP_SEL_VHF_VLAN_LEN,
+			       DP_SEL_VHF_HASH_LEN, pdata->mchash_table);
+
+	for (i = 1; i < NUM_OF_MAF; i++) {
+		lan78xx_write_reg(dev, MAF_HI(i), 0);
+		lan78xx_write_reg(dev, MAF_LO(i),
+				  pdata->pfilter_table[i][1]);
+		lan78xx_write_reg(dev, MAF_HI(i),
+				  pdata->pfilter_table[i][0]);
+	}
+
+	lan78xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
+}
+
+static void lan78xx_set_multicast(struct net_device *netdev)
+{
+	struct lan78xx_net *dev = netdev_priv(netdev);
+	struct lan78xx_priv *pdata = (struct lan78xx_priv *)(dev->data[0]);
+	unsigned long flags;
+	int i;
+
+	spin_lock_irqsave(&pdata->rfe_ctl_lock, flags);
+
+	pdata->rfe_ctl &= ~(RFE_CTL_UCAST_EN_ | RFE_CTL_MCAST_EN_ |
+			    RFE_CTL_DA_PERFECT_ | RFE_CTL_MCAST_HASH_);
+
+	for (i = 0; i < DP_SEL_VHF_HASH_LEN; i++)
+		pdata->mchash_table[i] = 0;
+
+	/* pfilter_table[0] has own HW address */
+	for (i = 1; i < NUM_OF_MAF; i++) {
+		pdata->pfilter_table[i][0] = 0;
+		pdata->pfilter_table[i][1] = 0;
+	}
+
+	pdata->rfe_ctl |= RFE_CTL_BCAST_EN_;
+
+	if (dev->net->flags & IFF_PROMISC) {
+		netif_dbg(dev, drv, dev->net, "promiscuous mode enabled");
+		pdata->rfe_ctl |= RFE_CTL_MCAST_EN_ | RFE_CTL_UCAST_EN_;
+	} else {
+		if (dev->net->flags & IFF_ALLMULTI) {
+			netif_dbg(dev, drv, dev->net,
+				  "receive all multicast enabled");
+			pdata->rfe_ctl |= RFE_CTL_MCAST_EN_;
+		}
+	}
+
+	if (netdev_mc_count(dev->net)) {
+		struct netdev_hw_addr *ha;
+		int i;
+
+		netif_dbg(dev, drv, dev->net, "receive multicast hash filter");
+
+		pdata->rfe_ctl |= RFE_CTL_DA_PERFECT_;
+
+		i = 1;
+		netdev_for_each_mc_addr(ha, netdev) {
+			/* set first 32 into Perfect Filter */
+			if (i < 33) {
+				lan78xx_set_addr_filter(pdata, i, ha->addr);
+			} else {
+				u32 bitnum = lan78xx_hash(ha->addr);
+
+				pdata->mchash_table[bitnum / 32] |=
+							(1 << (bitnum % 32));
+				pdata->rfe_ctl |= RFE_CTL_MCAST_HASH_;
+			}
+			i++;
+		}
+	}
+
+	spin_unlock_irqrestore(&pdata->rfe_ctl_lock, flags);
+
+	/* defer register writes to a sleepable context */
+	schedule_work(&pdata->set_multicast);
+}
+
+static int lan78xx_update_flowcontrol(struct lan78xx_net *dev, u8 duplex,
+				      u16 lcladv, u16 rmtadv)
+{
+	u32 flow = 0, fct_flow = 0;
+	u8 cap;
+
+	if (dev->fc_autoneg)
+		cap = mii_resolve_flowctrl_fdx(lcladv, rmtadv);
+	else
+		cap = dev->fc_request_control;
+
+	if (cap & FLOW_CTRL_TX)
+		flow |= (FLOW_CR_TX_FCEN_ | 0xFFFF);
+
+	if (cap & FLOW_CTRL_RX)
+		flow |= FLOW_CR_RX_FCEN_;
+
+	if (dev->udev->speed == USB_SPEED_SUPER)
+		fct_flow = FLOW_CTRL_THRESHOLD(FLOW_ON_SS, FLOW_OFF_SS);
+	else if (dev->udev->speed == USB_SPEED_HIGH)
+		fct_flow = FLOW_CTRL_THRESHOLD(FLOW_ON_HS, FLOW_OFF_HS);
+
+	netif_dbg(dev, link, dev->net, "rx pause %s, tx pause %s",
+		  (cap & FLOW_CTRL_RX ? "enabled" : "disabled"),
+		  (cap & FLOW_CTRL_TX ? "enabled" : "disabled"));
+
+	lan78xx_write_reg(dev, FCT_FLOW, fct_flow);
+
+	/* threshold value should be set before enabling flow */
+	lan78xx_write_reg(dev, FLOW, flow);
+
+	return 0;
+}
+
+static void lan78xx_rx_urb_submit_all(struct lan78xx_net *dev);
+
+static int lan78xx_mac_reset(struct lan78xx_net *dev)
+{
+	unsigned long start_time = jiffies;
+	u32 val;
+	int ret;
+
+	mutex_lock(&dev->phy_mutex);
+
+	/* Resetting the device while there is activity on the MDIO
+	 * bus can result in the MAC interface locking up and not
+	 * completing register access transactions.
+	 */
+	ret = lan78xx_phy_wait_not_busy(dev);
+	if (ret < 0)
+		goto done;
+
+	ret = lan78xx_read_reg(dev, MAC_CR, &val);
+	if (ret < 0)
+		goto done;
+
+	val |= MAC_CR_RST_;
+	ret = lan78xx_write_reg(dev, MAC_CR, val);
+	if (ret < 0)
+		goto done;
+
+	/* Wait for the reset to complete before allowing any further
+	 * MAC register accesses otherwise the MAC may lock up.
+	 */
+	do {
+		ret = lan78xx_read_reg(dev, MAC_CR, &val);
+		if (ret < 0)
+			goto done;
+
+		if (!(val & MAC_CR_RST_)) {
+			ret = 0;
+			goto done;
+		}
+	} while (!time_after(jiffies, start_time + HZ));
+
+	ret = -ETIMEDOUT;
+done:
+	mutex_unlock(&dev->phy_mutex);
+
+	return ret;
+}
+
+static int lan78xx_link_reset(struct lan78xx_net *dev)
+{
+	struct phy_device *phydev = dev->net->phydev;
+	struct ethtool_link_ksettings ecmd;
+	int ladv, radv, ret, link;
+	u32 buf;
+
+	/* clear LAN78xx interrupt status */
+	ret = lan78xx_write_reg(dev, INT_STS, INT_STS_PHY_INT_);
+	if (unlikely(ret < 0))
+		return ret;
+
+	mutex_lock(&phydev->lock);
+	phy_read_status(phydev);
+	link = phydev->link;
+	mutex_unlock(&phydev->lock);
+
+	if (!link && dev->link_on) {
+		dev->link_on = false;
+
+		/* reset MAC */
+		ret = lan78xx_mac_reset(dev);
+		if (ret < 0)
+			return ret;
+
+		del_timer(&dev->stat_monitor);
+	} else if (link && !dev->link_on) {
+		dev->link_on = true;
+
+		phy_ethtool_ksettings_get(phydev, &ecmd);
+
+		if (dev->udev->speed == USB_SPEED_SUPER) {
+			if (ecmd.base.speed == 1000) {
+				/* disable U2 */
+				ret = lan78xx_read_reg(dev, USB_CFG1, &buf);
+				if (ret < 0)
+					return ret;
+				buf &= ~USB_CFG1_DEV_U2_INIT_EN_;
+				ret = lan78xx_write_reg(dev, USB_CFG1, buf);
+				if (ret < 0)
+					return ret;
+				/* enable U1 */
+				ret = lan78xx_read_reg(dev, USB_CFG1, &buf);
+				if (ret < 0)
+					return ret;
+				buf |= USB_CFG1_DEV_U1_INIT_EN_;
+				ret = lan78xx_write_reg(dev, USB_CFG1, buf);
+				if (ret < 0)
+					return ret;
+			} else {
+				/* enable U1 & U2 */
+				ret = lan78xx_read_reg(dev, USB_CFG1, &buf);
+				if (ret < 0)
+					return ret;
+				buf |= USB_CFG1_DEV_U2_INIT_EN_;
+				buf |= USB_CFG1_DEV_U1_INIT_EN_;
+				ret = lan78xx_write_reg(dev, USB_CFG1, buf);
+				if (ret < 0)
+					return ret;
+			}
+		}
+
+		ladv = phy_read(phydev, MII_ADVERTISE);
+		if (ladv < 0)
+			return ladv;
+
+		radv = phy_read(phydev, MII_LPA);
+		if (radv < 0)
+			return radv;
+
+		netif_dbg(dev, link, dev->net,
+			  "speed: %u duplex: %d anadv: 0x%04x anlpa: 0x%04x",
+			  ecmd.base.speed, ecmd.base.duplex, ladv, radv);
+
+		ret = lan78xx_update_flowcontrol(dev, ecmd.base.duplex, ladv,
+						 radv);
+		if (ret < 0)
+			return ret;
+
+		if (!timer_pending(&dev->stat_monitor)) {
+			dev->delta = 1;
+			mod_timer(&dev->stat_monitor,
+				  jiffies + STAT_UPDATE_TIMER);
+		}
+
+		lan78xx_rx_urb_submit_all(dev);
+
+		napi_schedule(&dev->napi);
+	}
+
+	return 0;
+}
+
+/* some work can't be done in tasklets, so we use keventd
+ *
+ * NOTE:  annoying asymmetry:  if it's active, schedule_work() fails,
+ * but tasklet_schedule() doesn't.	hope the failure is rare.
+ */
+static void lan78xx_defer_kevent(struct lan78xx_net *dev, int work)
+{
+	set_bit(work, &dev->flags);
+	if (!schedule_delayed_work(&dev->wq, 0))
+		netdev_err(dev->net, "kevent %d may have been dropped\n", work);
+}
+
+static void lan78xx_status(struct lan78xx_net *dev, struct urb *urb)
+{
+	u32 intdata;
+
+	if (urb->actual_length != 4) {
+		netdev_warn(dev->net,
+			    "unexpected urb length %d", urb->actual_length);
+		return;
+	}
+
+	intdata = get_unaligned_le32(urb->transfer_buffer);
+
+	if (intdata & INT_ENP_PHY_INT) {
+		netif_dbg(dev, link, dev->net, "PHY INTR: 0x%08x\n", intdata);
+		lan78xx_defer_kevent(dev, EVENT_LINK_RESET);
+
+		if (dev->domain_data.phyirq > 0)
+			generic_handle_irq_safe(dev->domain_data.phyirq);
+	} else {
+		netdev_warn(dev->net,
+			    "unexpected interrupt: 0x%08x\n", intdata);
+	}
+}
+
+static int lan78xx_ethtool_get_eeprom_len(struct net_device *netdev)
+{
+	return MAX_EEPROM_SIZE;
+}
+
+static int lan78xx_ethtool_get_eeprom(struct net_device *netdev,
+				      struct ethtool_eeprom *ee, u8 *data)
+{
+	struct lan78xx_net *dev = netdev_priv(netdev);
+	int ret;
+
+	ret = usb_autopm_get_interface(dev->intf);
+	if (ret)
+		return ret;
+
+	ee->magic = LAN78XX_EEPROM_MAGIC;
+
+	ret = lan78xx_read_raw_eeprom(dev, ee->offset, ee->len, data);
+
+	usb_autopm_put_interface(dev->intf);
+
+	return ret;
+}
+
+static int lan78xx_ethtool_set_eeprom(struct net_device *netdev,
+				      struct ethtool_eeprom *ee, u8 *data)
+{
+	struct lan78xx_net *dev = netdev_priv(netdev);
+	int ret;
+
+	ret = usb_autopm_get_interface(dev->intf);
+	if (ret)
+		return ret;
+
+	/* Invalid EEPROM_INDICATOR at offset zero will result in a failure
+	 * to load data from EEPROM
+	 */
+	if (ee->magic == LAN78XX_EEPROM_MAGIC)
+		ret = lan78xx_write_raw_eeprom(dev, ee->offset, ee->len, data);
+	else if ((ee->magic == LAN78XX_OTP_MAGIC) &&
+		 (ee->offset == 0) &&
+		 (ee->len == 512) &&
+		 (data[0] == OTP_INDICATOR_1))
+		ret = lan78xx_write_raw_otp(dev, ee->offset, ee->len, data);
+
+	usb_autopm_put_interface(dev->intf);
+
+	return ret;
+}
+
+static void lan78xx_get_strings(struct net_device *netdev, u32 stringset,
+				u8 *data)
+{
+	if (stringset == ETH_SS_STATS)
+		memcpy(data, lan78xx_gstrings, sizeof(lan78xx_gstrings));
+}
+
+static int lan78xx_get_sset_count(struct net_device *netdev, int sset)
+{
+	if (sset == ETH_SS_STATS)
+		return ARRAY_SIZE(lan78xx_gstrings);
+	else
+		return -EOPNOTSUPP;
+}
+
+static void lan78xx_get_stats(struct net_device *netdev,
+			      struct ethtool_stats *stats, u64 *data)
+{
+	struct lan78xx_net *dev = netdev_priv(netdev);
+
+	lan78xx_update_stats(dev);
+
+	mutex_lock(&dev->stats.access_lock);
+	memcpy(data, &dev->stats.curr_stat, sizeof(dev->stats.curr_stat));
+	mutex_unlock(&dev->stats.access_lock);
+}
+
+static void lan78xx_get_wol(struct net_device *netdev,
+			    struct ethtool_wolinfo *wol)
+{
+	struct lan78xx_net *dev = netdev_priv(netdev);
+	int ret;
+	u32 buf;
+	struct lan78xx_priv *pdata = (struct lan78xx_priv *)(dev->data[0]);
+
+	if (usb_autopm_get_interface(dev->intf) < 0)
+		return;
+
+	ret = lan78xx_read_reg(dev, USB_CFG0, &buf);
+	if (unlikely(ret < 0)) {
+		wol->supported = 0;
+		wol->wolopts = 0;
+	} else {
+		if (buf & USB_CFG_RMT_WKP_) {
+			wol->supported = WAKE_ALL;
+			wol->wolopts = pdata->wol;
+		} else {
+			wol->supported = 0;
+			wol->wolopts = 0;
+		}
+	}
+
+	usb_autopm_put_interface(dev->intf);
+}
+
+static int lan78xx_set_wol(struct net_device *netdev,
+			   struct ethtool_wolinfo *wol)
+{
+	struct lan78xx_net *dev = netdev_priv(netdev);
+	struct lan78xx_priv *pdata = (struct lan78xx_priv *)(dev->data[0]);
+	int ret;
+
+	ret = usb_autopm_get_interface(dev->intf);
+	if (ret < 0)
+		return ret;
+
+	if (wol->wolopts & ~WAKE_ALL)
+		return -EINVAL;
+
+	pdata->wol = wol->wolopts;
+
+	device_set_wakeup_enable(&dev->udev->dev, (bool)wol->wolopts);
+
+	phy_ethtool_set_wol(netdev->phydev, wol);
+
+	usb_autopm_put_interface(dev->intf);
+
+	return ret;
+}
+
+static int lan78xx_get_eee(struct net_device *net, struct ethtool_eee *edata)
+{
+	struct lan78xx_net *dev = netdev_priv(net);
+	struct phy_device *phydev = net->phydev;
+	int ret;
+	u32 buf;
+
+	ret = usb_autopm_get_interface(dev->intf);
+	if (ret < 0)
+		return ret;
+
+	ret = phy_ethtool_get_eee(phydev, edata);
+	if (ret < 0)
+		goto exit;
+
+	ret = lan78xx_read_reg(dev, MAC_CR, &buf);
+	if (buf & MAC_CR_EEE_EN_) {
+		edata->eee_enabled = true;
+		edata->eee_active = !!(edata->advertised &
+				       edata->lp_advertised);
+		edata->tx_lpi_enabled = true;
+		/* EEE_TX_LPI_REQ_DLY & tx_lpi_timer are same uSec unit */
+		ret = lan78xx_read_reg(dev, EEE_TX_LPI_REQ_DLY, &buf);
+		edata->tx_lpi_timer = buf;
+	} else {
+		edata->eee_enabled = false;
+		edata->eee_active = false;
+		edata->tx_lpi_enabled = false;
+		edata->tx_lpi_timer = 0;
+	}
+
+	ret = 0;
+exit:
+	usb_autopm_put_interface(dev->intf);
+
+	return ret;
+}
+
+static int lan78xx_set_eee(struct net_device *net, struct ethtool_eee *edata)
+{
+	struct lan78xx_net *dev = netdev_priv(net);
+	int ret;
+	u32 buf;
+
+	ret = usb_autopm_get_interface(dev->intf);
+	if (ret < 0)
+		return ret;
+
+	if (edata->eee_enabled) {
+		ret = lan78xx_read_reg(dev, MAC_CR, &buf);
+		buf |= MAC_CR_EEE_EN_;
+		ret = lan78xx_write_reg(dev, MAC_CR, buf);
+
+		phy_ethtool_set_eee(net->phydev, edata);
+
+		buf = (u32)edata->tx_lpi_timer;
+		ret = lan78xx_write_reg(dev, EEE_TX_LPI_REQ_DLY, buf);
+	} else {
+		ret = lan78xx_read_reg(dev, MAC_CR, &buf);
+		buf &= ~MAC_CR_EEE_EN_;
+		ret = lan78xx_write_reg(dev, MAC_CR, buf);
+	}
+
+	usb_autopm_put_interface(dev->intf);
+
+	return 0;
+}
+
+static u32 lan78xx_get_link(struct net_device *net)
+{
+	u32 link;
+
+	mutex_lock(&net->phydev->lock);
+	phy_read_status(net->phydev);
+	link = net->phydev->link;
+	mutex_unlock(&net->phydev->lock);
+
+	return link;
+}
+
+static void lan78xx_get_drvinfo(struct net_device *net,
+				struct ethtool_drvinfo *info)
+{
+	struct lan78xx_net *dev = netdev_priv(net);
+
+	strncpy(info->driver, DRIVER_NAME, sizeof(info->driver));
+	usb_make_path(dev->udev, info->bus_info, sizeof(info->bus_info));
+}
+
+static u32 lan78xx_get_msglevel(struct net_device *net)
+{
+	struct lan78xx_net *dev = netdev_priv(net);
+
+	return dev->msg_enable;
+}
+
+static void lan78xx_set_msglevel(struct net_device *net, u32 level)
+{
+	struct lan78xx_net *dev = netdev_priv(net);
+
+	dev->msg_enable = level;
+}
+
+static int lan78xx_get_link_ksettings(struct net_device *net,
+				      struct ethtool_link_ksettings *cmd)
+{
+	struct lan78xx_net *dev = netdev_priv(net);
+	struct phy_device *phydev = net->phydev;
+	int ret;
+
+	ret = usb_autopm_get_interface(dev->intf);
+	if (ret < 0)
+		return ret;
+
+	phy_ethtool_ksettings_get(phydev, cmd);
+
+	usb_autopm_put_interface(dev->intf);
+
+	return ret;
+}
+
+static int lan78xx_set_link_ksettings(struct net_device *net,
+				      const struct ethtool_link_ksettings *cmd)
+{
+	struct lan78xx_net *dev = netdev_priv(net);
+	struct phy_device *phydev = net->phydev;
+	int ret = 0;
+	int temp;
+
+	ret = usb_autopm_get_interface(dev->intf);
+	if (ret < 0)
+		return ret;
+
+	/* change speed & duplex */
+	ret = phy_ethtool_ksettings_set(phydev, cmd);
+
+	if (!cmd->base.autoneg) {
+		/* force link down */
+		temp = phy_read(phydev, MII_BMCR);
+		phy_write(phydev, MII_BMCR, temp | BMCR_LOOPBACK);
+		mdelay(1);
+		phy_write(phydev, MII_BMCR, temp);
+	}
+
+	usb_autopm_put_interface(dev->intf);
+
+	return ret;
+}
+
+static void lan78xx_get_pause(struct net_device *net,
+			      struct ethtool_pauseparam *pause)
+{
+	struct lan78xx_net *dev = netdev_priv(net);
+	struct phy_device *phydev = net->phydev;
+	struct ethtool_link_ksettings ecmd;
+
+	phy_ethtool_ksettings_get(phydev, &ecmd);
+
+	pause->autoneg = dev->fc_autoneg;
+
+	if (dev->fc_request_control & FLOW_CTRL_TX)
+		pause->tx_pause = 1;
+
+	if (dev->fc_request_control & FLOW_CTRL_RX)
+		pause->rx_pause = 1;
+}
+
+static int lan78xx_set_pause(struct net_device *net,
+			     struct ethtool_pauseparam *pause)
+{
+	struct lan78xx_net *dev = netdev_priv(net);
+	struct phy_device *phydev = net->phydev;
+	struct ethtool_link_ksettings ecmd;
+	int ret;
+
+	phy_ethtool_ksettings_get(phydev, &ecmd);
+
+	if (pause->autoneg && !ecmd.base.autoneg) {
+		ret = -EINVAL;
+		goto exit;
+	}
+
+	dev->fc_request_control = 0;
+	if (pause->rx_pause)
+		dev->fc_request_control |= FLOW_CTRL_RX;
+
+	if (pause->tx_pause)
+		dev->fc_request_control |= FLOW_CTRL_TX;
+
+	if (ecmd.base.autoneg) {
+		__ETHTOOL_DECLARE_LINK_MODE_MASK(fc) = { 0, };
+		u32 mii_adv;
+
+		linkmode_clear_bit(ETHTOOL_LINK_MODE_Pause_BIT,
+				   ecmd.link_modes.advertising);
+		linkmode_clear_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT,
+				   ecmd.link_modes.advertising);
+		mii_adv = (u32)mii_advertise_flowctrl(dev->fc_request_control);
+		mii_adv_to_linkmode_adv_t(fc, mii_adv);
+		linkmode_or(ecmd.link_modes.advertising, fc,
+			    ecmd.link_modes.advertising);
+
+		phy_ethtool_ksettings_set(phydev, &ecmd);
+	}
+
+	dev->fc_autoneg = pause->autoneg;
+
+	ret = 0;
+exit:
+	return ret;
+}
+
+static int lan78xx_get_regs_len(struct net_device *netdev)
+{
+	if (!netdev->phydev)
+		return (sizeof(lan78xx_regs));
+	else
+		return (sizeof(lan78xx_regs) + PHY_REG_SIZE);
+}
+
+static void
+lan78xx_get_regs(struct net_device *netdev, struct ethtool_regs *regs,
+		 void *buf)
+{
+	u32 *data = buf;
+	int i, j;
+	struct lan78xx_net *dev = netdev_priv(netdev);
+
+	/* Read Device/MAC registers */
+	for (i = 0; i < ARRAY_SIZE(lan78xx_regs); i++)
+		lan78xx_read_reg(dev, lan78xx_regs[i], &data[i]);
+
+	if (!netdev->phydev)
+		return;
+
+	/* Read PHY registers */
+	for (j = 0; j < 32; i++, j++)
+		data[i] = phy_read(netdev->phydev, j);
+}
+
+static const struct ethtool_ops lan78xx_ethtool_ops = {
+	.get_link	= lan78xx_get_link,
+	.nway_reset	= phy_ethtool_nway_reset,
+	.get_drvinfo	= lan78xx_get_drvinfo,
+	.get_msglevel	= lan78xx_get_msglevel,
+	.set_msglevel	= lan78xx_set_msglevel,
+	.get_eeprom_len = lan78xx_ethtool_get_eeprom_len,
+	.get_eeprom	= lan78xx_ethtool_get_eeprom,
+	.set_eeprom	= lan78xx_ethtool_set_eeprom,
+	.get_ethtool_stats = lan78xx_get_stats,
+	.get_sset_count = lan78xx_get_sset_count,
+	.get_strings	= lan78xx_get_strings,
+	.get_wol	= lan78xx_get_wol,
+	.set_wol	= lan78xx_set_wol,
+	.get_ts_info	= ethtool_op_get_ts_info,
+	.get_eee	= lan78xx_get_eee,
+	.set_eee	= lan78xx_set_eee,
+	.get_pauseparam	= lan78xx_get_pause,
+	.set_pauseparam	= lan78xx_set_pause,
+	.get_link_ksettings = lan78xx_get_link_ksettings,
+	.set_link_ksettings = lan78xx_set_link_ksettings,
+	.get_regs_len	= lan78xx_get_regs_len,
+	.get_regs	= lan78xx_get_regs,
+};
+
+static void lan78xx_init_mac_address(struct lan78xx_net *dev)
+{
+	u32 addr_lo, addr_hi;
+	u8 addr[6];
+
+	lan78xx_read_reg(dev, RX_ADDRL, &addr_lo);
+	lan78xx_read_reg(dev, RX_ADDRH, &addr_hi);
+
+	addr[0] = addr_lo & 0xFF;
+	addr[1] = (addr_lo >> 8) & 0xFF;
+	addr[2] = (addr_lo >> 16) & 0xFF;
+	addr[3] = (addr_lo >> 24) & 0xFF;
+	addr[4] = addr_hi & 0xFF;
+	addr[5] = (addr_hi >> 8) & 0xFF;
+
+	if (!is_valid_ether_addr(addr)) {
+		if (!eth_platform_get_mac_address(&dev->udev->dev, addr)) {
+			/* valid address present in Device Tree */
+			netif_dbg(dev, ifup, dev->net,
+				  "MAC address read from Device Tree");
+		} else if (((lan78xx_read_eeprom(dev, EEPROM_MAC_OFFSET,
+						 ETH_ALEN, addr) == 0) ||
+			    (lan78xx_read_otp(dev, EEPROM_MAC_OFFSET,
+					      ETH_ALEN, addr) == 0)) &&
+			   is_valid_ether_addr(addr)) {
+			/* eeprom values are valid so use them */
+			netif_dbg(dev, ifup, dev->net,
+				  "MAC address read from EEPROM");
+		} else {
+			/* generate random MAC */
+			eth_random_addr(addr);
+			netif_dbg(dev, ifup, dev->net,
+				  "MAC address set to random addr");
+		}
+
+		addr_lo = addr[0] | (addr[1] << 8) |
+			  (addr[2] << 16) | (addr[3] << 24);
+		addr_hi = addr[4] | (addr[5] << 8);
+
+		lan78xx_write_reg(dev, RX_ADDRL, addr_lo);
+		lan78xx_write_reg(dev, RX_ADDRH, addr_hi);
+	}
+
+	lan78xx_write_reg(dev, MAF_LO(0), addr_lo);
+	lan78xx_write_reg(dev, MAF_HI(0), addr_hi | MAF_HI_VALID_);
+
+	eth_hw_addr_set(dev->net, addr);
+}
+
+/* MDIO read and write wrappers for phylib */
+static int lan78xx_mdiobus_read(struct mii_bus *bus, int phy_id, int idx)
+{
+	struct lan78xx_net *dev = bus->priv;
+	u32 val, addr;
+	int ret;
+
+	ret = usb_autopm_get_interface(dev->intf);
+	if (ret < 0)
+		return ret;
+
+	mutex_lock(&dev->phy_mutex);
+
+	/* confirm MII not busy */
+	ret = lan78xx_phy_wait_not_busy(dev);
+	if (ret < 0)
+		goto done;
+
+	/* set the address, index & direction (read from PHY) */
+	addr = mii_access(phy_id, idx, MII_READ);
+	ret = lan78xx_write_reg(dev, MII_ACC, addr);
+
+	ret = lan78xx_phy_wait_not_busy(dev);
+	if (ret < 0)
+		goto done;
+
+	ret = lan78xx_read_reg(dev, MII_DATA, &val);
+
+	ret = (int)(val & 0xFFFF);
+
+done:
+	mutex_unlock(&dev->phy_mutex);
+	usb_autopm_put_interface(dev->intf);
+
+	return ret;
+}
+
+static int lan78xx_mdiobus_write(struct mii_bus *bus, int phy_id, int idx,
+				 u16 regval)
+{
+	struct lan78xx_net *dev = bus->priv;
+	u32 val, addr;
+	int ret;
+
+	ret = usb_autopm_get_interface(dev->intf);
+	if (ret < 0)
+		return ret;
+
+	mutex_lock(&dev->phy_mutex);
+
+	/* confirm MII not busy */
+	ret = lan78xx_phy_wait_not_busy(dev);
+	if (ret < 0)
+		goto done;
+
+	val = (u32)regval;
+	ret = lan78xx_write_reg(dev, MII_DATA, val);
+
+	/* set the address, index & direction (write to PHY) */
+	addr = mii_access(phy_id, idx, MII_WRITE);
+	ret = lan78xx_write_reg(dev, MII_ACC, addr);
+
+	ret = lan78xx_phy_wait_not_busy(dev);
+	if (ret < 0)
+		goto done;
+
+done:
+	mutex_unlock(&dev->phy_mutex);
+	usb_autopm_put_interface(dev->intf);
+	return 0;
+}
+
+static int lan78xx_mdio_init(struct lan78xx_net *dev)
+{
+	struct device_node *node;
+	int ret;
+
+	dev->mdiobus = mdiobus_alloc();
+	if (!dev->mdiobus) {
+		netdev_err(dev->net, "can't allocate MDIO bus\n");
+		return -ENOMEM;
+	}
+
+	dev->mdiobus->priv = (void *)dev;
+	dev->mdiobus->read = lan78xx_mdiobus_read;
+	dev->mdiobus->write = lan78xx_mdiobus_write;
+	dev->mdiobus->name = "lan78xx-mdiobus";
+	dev->mdiobus->parent = &dev->udev->dev;
+
+	snprintf(dev->mdiobus->id, MII_BUS_ID_SIZE, "usb-%03d:%03d",
+		 dev->udev->bus->busnum, dev->udev->devnum);
+
+	switch (dev->chipid) {
+	case ID_REV_CHIP_ID_7800_:
+	case ID_REV_CHIP_ID_7850_:
+		/* set to internal PHY id */
+		dev->mdiobus->phy_mask = ~(1 << 1);
+		break;
+	case ID_REV_CHIP_ID_7801_:
+		/* scan thru PHYAD[2..0] */
+		dev->mdiobus->phy_mask = ~(0xFF);
+		break;
+	}
+
+	node = of_get_child_by_name(dev->udev->dev.of_node, "mdio");
+	ret = of_mdiobus_register(dev->mdiobus, node);
+	of_node_put(node);
+	if (ret) {
+		netdev_err(dev->net, "can't register MDIO bus\n");
+		goto exit1;
+	}
+
+	netdev_dbg(dev->net, "registered mdiobus bus %s\n", dev->mdiobus->id);
+	return 0;
+exit1:
+	mdiobus_free(dev->mdiobus);
+	return ret;
+}
+
+static void lan78xx_remove_mdio(struct lan78xx_net *dev)
+{
+	mdiobus_unregister(dev->mdiobus);
+	mdiobus_free(dev->mdiobus);
+}
+
+static void lan78xx_link_status_change(struct net_device *net)
+{
+	struct phy_device *phydev = net->phydev;
+
+	phy_print_status(phydev);
+}
+
+static int irq_map(struct irq_domain *d, unsigned int irq,
+		   irq_hw_number_t hwirq)
+{
+	struct irq_domain_data *data = d->host_data;
+
+	irq_set_chip_data(irq, data);
+	irq_set_chip_and_handler(irq, data->irqchip, data->irq_handler);
+	irq_set_noprobe(irq);
+
+	return 0;
+}
+
+static void irq_unmap(struct irq_domain *d, unsigned int irq)
+{
+	irq_set_chip_and_handler(irq, NULL, NULL);
+	irq_set_chip_data(irq, NULL);
+}
+
+static const struct irq_domain_ops chip_domain_ops = {
+	.map	= irq_map,
+	.unmap	= irq_unmap,
+};
+
+static void lan78xx_irq_mask(struct irq_data *irqd)
+{
+	struct irq_domain_data *data = irq_data_get_irq_chip_data(irqd);
+
+	data->irqenable &= ~BIT(irqd_to_hwirq(irqd));
+}
+
+static void lan78xx_irq_unmask(struct irq_data *irqd)
+{
+	struct irq_domain_data *data = irq_data_get_irq_chip_data(irqd);
+
+	data->irqenable |= BIT(irqd_to_hwirq(irqd));
+}
+
+static void lan78xx_irq_bus_lock(struct irq_data *irqd)
+{
+	struct irq_domain_data *data = irq_data_get_irq_chip_data(irqd);
+
+	mutex_lock(&data->irq_lock);
+}
+
+static void lan78xx_irq_bus_sync_unlock(struct irq_data *irqd)
+{
+	struct irq_domain_data *data = irq_data_get_irq_chip_data(irqd);
+	struct lan78xx_net *dev =
+			container_of(data, struct lan78xx_net, domain_data);
+	u32 buf;
+
+	/* call register access here because irq_bus_lock & irq_bus_sync_unlock
+	 * are only two callbacks executed in non-atomic contex.
+	 */
+	lan78xx_read_reg(dev, INT_EP_CTL, &buf);
+	if (buf != data->irqenable)
+		lan78xx_write_reg(dev, INT_EP_CTL, data->irqenable);
+
+	mutex_unlock(&data->irq_lock);
+}
+
+static struct irq_chip lan78xx_irqchip = {
+	.name			= "lan78xx-irqs",
+	.irq_mask		= lan78xx_irq_mask,
+	.irq_unmask		= lan78xx_irq_unmask,
+	.irq_bus_lock		= lan78xx_irq_bus_lock,
+	.irq_bus_sync_unlock	= lan78xx_irq_bus_sync_unlock,
+};
+
+static int lan78xx_setup_irq_domain(struct lan78xx_net *dev)
+{
+	struct device_node *of_node;
+	struct irq_domain *irqdomain;
+	unsigned int irqmap = 0;
+	u32 buf;
+	int ret = 0;
+
+	of_node = dev->udev->dev.parent->of_node;
+
+	mutex_init(&dev->domain_data.irq_lock);
+
+	lan78xx_read_reg(dev, INT_EP_CTL, &buf);
+	dev->domain_data.irqenable = buf;
+
+	dev->domain_data.irqchip = &lan78xx_irqchip;
+	dev->domain_data.irq_handler = handle_simple_irq;
+
+	irqdomain = irq_domain_add_simple(of_node, MAX_INT_EP, 0,
+					  &chip_domain_ops, &dev->domain_data);
+	if (irqdomain) {
+		/* create mapping for PHY interrupt */
+		irqmap = irq_create_mapping(irqdomain, INT_EP_PHY);
+		if (!irqmap) {
+			irq_domain_remove(irqdomain);
+
+			irqdomain = NULL;
+			ret = -EINVAL;
+		}
+	} else {
+		ret = -EINVAL;
+	}
+
+	dev->domain_data.irqdomain = irqdomain;
+	dev->domain_data.phyirq = irqmap;
+
+	return ret;
+}
+
+static void lan78xx_remove_irq_domain(struct lan78xx_net *dev)
+{
+	if (dev->domain_data.phyirq > 0) {
+		irq_dispose_mapping(dev->domain_data.phyirq);
+
+		if (dev->domain_data.irqdomain)
+			irq_domain_remove(dev->domain_data.irqdomain);
+	}
+	dev->domain_data.phyirq = 0;
+	dev->domain_data.irqdomain = NULL;
+}
+
+static int lan8835_fixup(struct phy_device *phydev)
+{
+	int buf;
+	struct lan78xx_net *dev = netdev_priv(phydev->attached_dev);
+
+	/* LED2/PME_N/IRQ_N/RGMII_ID pin to IRQ_N mode */
+	buf = phy_read_mmd(phydev, MDIO_MMD_PCS, 0x8010);
+	buf &= ~0x1800;
+	buf |= 0x0800;
+	phy_write_mmd(phydev, MDIO_MMD_PCS, 0x8010, buf);
+
+	/* RGMII MAC TXC Delay Enable */
+	lan78xx_write_reg(dev, MAC_RGMII_ID,
+			  MAC_RGMII_ID_TXC_DELAY_EN_);
+
+	/* RGMII TX DLL Tune Adjust */
+	lan78xx_write_reg(dev, RGMII_TX_BYP_DLL, 0x3D00);
+
+	dev->interface = PHY_INTERFACE_MODE_RGMII_TXID;
+
+	return 1;
+}
+
+static int ksz9031rnx_fixup(struct phy_device *phydev)
+{
+	struct lan78xx_net *dev = netdev_priv(phydev->attached_dev);
+
+	/* Micrel9301RNX PHY configuration */
+	/* RGMII Control Signal Pad Skew */
+	phy_write_mmd(phydev, MDIO_MMD_WIS, 4, 0x0077);
+	/* RGMII RX Data Pad Skew */
+	phy_write_mmd(phydev, MDIO_MMD_WIS, 5, 0x7777);
+	/* RGMII RX Clock Pad Skew */
+	phy_write_mmd(phydev, MDIO_MMD_WIS, 8, 0x1FF);
+
+	dev->interface = PHY_INTERFACE_MODE_RGMII_RXID;
+
+	return 1;
+}
+
+static struct phy_device *lan7801_phy_init(struct lan78xx_net *dev)
+{
+	u32 buf;
+	int ret;
+	struct fixed_phy_status fphy_status = {
+		.link = 1,
+		.speed = SPEED_1000,
+		.duplex = DUPLEX_FULL,
+	};
+	struct phy_device *phydev;
+
+	phydev = phy_find_first(dev->mdiobus);
+	if (!phydev) {
+		netdev_dbg(dev->net, "PHY Not Found!! Registering Fixed PHY\n");
+		phydev = fixed_phy_register(PHY_POLL, &fphy_status, NULL);
+		if (IS_ERR(phydev)) {
+			netdev_err(dev->net, "No PHY/fixed_PHY found\n");
+			return NULL;
+		}
+		netdev_dbg(dev->net, "Registered FIXED PHY\n");
+		dev->interface = PHY_INTERFACE_MODE_RGMII;
+		ret = lan78xx_write_reg(dev, MAC_RGMII_ID,
+					MAC_RGMII_ID_TXC_DELAY_EN_);
+		ret = lan78xx_write_reg(dev, RGMII_TX_BYP_DLL, 0x3D00);
+		ret = lan78xx_read_reg(dev, HW_CFG, &buf);
+		buf |= HW_CFG_CLK125_EN_;
+		buf |= HW_CFG_REFCLK25_EN_;
+		ret = lan78xx_write_reg(dev, HW_CFG, buf);
+	} else {
+		if (!phydev->drv) {
+			netdev_err(dev->net, "no PHY driver found\n");
+			return NULL;
+		}
+		dev->interface = PHY_INTERFACE_MODE_RGMII;
+		/* external PHY fixup for KSZ9031RNX */
+		ret = phy_register_fixup_for_uid(PHY_KSZ9031RNX, 0xfffffff0,
+						 ksz9031rnx_fixup);
+		if (ret < 0) {
+			netdev_err(dev->net, "Failed to register fixup for PHY_KSZ9031RNX\n");
+			return NULL;
+		}
+		/* external PHY fixup for LAN8835 */
+		ret = phy_register_fixup_for_uid(PHY_LAN8835, 0xfffffff0,
+						 lan8835_fixup);
+		if (ret < 0) {
+			netdev_err(dev->net, "Failed to register fixup for PHY_LAN8835\n");
+			return NULL;
+		}
+		/* add more external PHY fixup here if needed */
+
+		phydev->is_internal = false;
+	}
+	return phydev;
+}
+
+static int lan78xx_phy_init(struct lan78xx_net *dev)
+{
+	__ETHTOOL_DECLARE_LINK_MODE_MASK(fc) = { 0, };
+	int ret;
+	u32 mii_adv;
+	struct phy_device *phydev;
+
+	switch (dev->chipid) {
+	case ID_REV_CHIP_ID_7801_:
+		phydev = lan7801_phy_init(dev);
+		if (!phydev) {
+			netdev_err(dev->net, "lan7801: PHY Init Failed");
+			return -EIO;
+		}
+		break;
+
+	case ID_REV_CHIP_ID_7800_:
+	case ID_REV_CHIP_ID_7850_:
+		phydev = phy_find_first(dev->mdiobus);
+		if (!phydev) {
+			netdev_err(dev->net, "no PHY found\n");
+			return -EIO;
+		}
+		phydev->is_internal = true;
+		dev->interface = PHY_INTERFACE_MODE_GMII;
+		break;
+
+	default:
+		netdev_err(dev->net, "Unknown CHIP ID found\n");
+		return -EIO;
+	}
+
+	/* if phyirq is not set, use polling mode in phylib */
+	if (dev->domain_data.phyirq > 0)
+		phydev->irq = dev->domain_data.phyirq;
+	else
+		phydev->irq = PHY_POLL;
+	netdev_dbg(dev->net, "phydev->irq = %d\n", phydev->irq);
+
+	/* set to AUTOMDIX */
+	phydev->mdix = ETH_TP_MDI_AUTO;
+
+	ret = phy_connect_direct(dev->net, phydev,
+				 lan78xx_link_status_change,
+				 dev->interface);
+	if (ret) {
+		netdev_err(dev->net, "can't attach PHY to %s\n",
+			   dev->mdiobus->id);
+		if (dev->chipid == ID_REV_CHIP_ID_7801_) {
+			if (phy_is_pseudo_fixed_link(phydev)) {
+				fixed_phy_unregister(phydev);
+			} else {
+				phy_unregister_fixup_for_uid(PHY_KSZ9031RNX,
+							     0xfffffff0);
+				phy_unregister_fixup_for_uid(PHY_LAN8835,
+							     0xfffffff0);
+			}
+		}
+		return -EIO;
+	}
+
+	/* MAC doesn't support 1000T Half */
+	phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_1000baseT_Half_BIT);
+
+	/* support both flow controls */
+	dev->fc_request_control = (FLOW_CTRL_RX | FLOW_CTRL_TX);
+	linkmode_clear_bit(ETHTOOL_LINK_MODE_Pause_BIT,
+			   phydev->advertising);
+	linkmode_clear_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT,
+			   phydev->advertising);
+	mii_adv = (u32)mii_advertise_flowctrl(dev->fc_request_control);
+	mii_adv_to_linkmode_adv_t(fc, mii_adv);
+	linkmode_or(phydev->advertising, fc, phydev->advertising);
+
+	if (phydev->mdio.dev.of_node) {
+		u32 reg;
+		int len;
+
+		len = of_property_count_elems_of_size(phydev->mdio.dev.of_node,
+						      "microchip,led-modes",
+						      sizeof(u32));
+		if (len >= 0) {
+			/* Ensure the appropriate LEDs are enabled */
+			lan78xx_read_reg(dev, HW_CFG, &reg);
+			reg &= ~(HW_CFG_LED0_EN_ |
+				 HW_CFG_LED1_EN_ |
+				 HW_CFG_LED2_EN_ |
+				 HW_CFG_LED3_EN_);
+			reg |= (len > 0) * HW_CFG_LED0_EN_ |
+				(len > 1) * HW_CFG_LED1_EN_ |
+				(len > 2) * HW_CFG_LED2_EN_ |
+				(len > 3) * HW_CFG_LED3_EN_;
+			lan78xx_write_reg(dev, HW_CFG, reg);
+		}
+	}
+
+	genphy_config_aneg(phydev);
+
+	dev->fc_autoneg = phydev->autoneg;
+
+	return 0;
+}
+
+static int lan78xx_set_rx_max_frame_length(struct lan78xx_net *dev, int size)
+{
+	u32 buf;
+	bool rxenabled;
+
+	lan78xx_read_reg(dev, MAC_RX, &buf);
+
+	rxenabled = ((buf & MAC_RX_RXEN_) != 0);
+
+	if (rxenabled) {
+		buf &= ~MAC_RX_RXEN_;
+		lan78xx_write_reg(dev, MAC_RX, buf);
+	}
+
+	/* add 4 to size for FCS */
+	buf &= ~MAC_RX_MAX_SIZE_MASK_;
+	buf |= (((size + 4) << MAC_RX_MAX_SIZE_SHIFT_) & MAC_RX_MAX_SIZE_MASK_);
+
+	lan78xx_write_reg(dev, MAC_RX, buf);
+
+	if (rxenabled) {
+		buf |= MAC_RX_RXEN_;
+		lan78xx_write_reg(dev, MAC_RX, buf);
+	}
+
+	return 0;
+}
+
+static int unlink_urbs(struct lan78xx_net *dev, struct sk_buff_head *q)
+{
+	struct sk_buff *skb;
+	unsigned long flags;
+	int count = 0;
+
+	spin_lock_irqsave(&q->lock, flags);
+	while (!skb_queue_empty(q)) {
+		struct skb_data	*entry;
+		struct urb *urb;
+		int ret;
+
+		skb_queue_walk(q, skb) {
+			entry = (struct skb_data *)skb->cb;
+			if (entry->state != unlink_start)
+				goto found;
+		}
+		break;
+found:
+		entry->state = unlink_start;
+		urb = entry->urb;
+
+		/* Get reference count of the URB to avoid it to be
+		 * freed during usb_unlink_urb, which may trigger
+		 * use-after-free problem inside usb_unlink_urb since
+		 * usb_unlink_urb is always racing with .complete
+		 * handler(include defer_bh).
+		 */
+		usb_get_urb(urb);
+		spin_unlock_irqrestore(&q->lock, flags);
+		/* during some PM-driven resume scenarios,
+		 * these (async) unlinks complete immediately
+		 */
+		ret = usb_unlink_urb(urb);
+		if (ret != -EINPROGRESS && ret != 0)
+			netdev_dbg(dev->net, "unlink urb err, %d\n", ret);
+		else
+			count++;
+		usb_put_urb(urb);
+		spin_lock_irqsave(&q->lock, flags);
+	}
+	spin_unlock_irqrestore(&q->lock, flags);
+	return count;
+}
+
+static int lan78xx_change_mtu(struct net_device *netdev, int new_mtu)
+{
+	struct lan78xx_net *dev = netdev_priv(netdev);
+	int max_frame_len = RX_MAX_FRAME_LEN(new_mtu);
+	int ret;
+
+	/* no second zero-length packet read wanted after mtu-sized packets */
+	if ((max_frame_len % dev->maxpacket) == 0)
+		return -EDOM;
+
+	ret = usb_autopm_get_interface(dev->intf);
+	if (ret < 0)
+		return ret;
+
+	ret = lan78xx_set_rx_max_frame_length(dev, max_frame_len);
+	if (!ret)
+		netdev->mtu = new_mtu;
+
+	usb_autopm_put_interface(dev->intf);
+
+	return ret;
+}
+
+static int lan78xx_set_mac_addr(struct net_device *netdev, void *p)
+{
+	struct lan78xx_net *dev = netdev_priv(netdev);
+	struct sockaddr *addr = p;
+	u32 addr_lo, addr_hi;
+
+	if (netif_running(netdev))
+		return -EBUSY;
+
+	if (!is_valid_ether_addr(addr->sa_data))
+		return -EADDRNOTAVAIL;
+
+	eth_hw_addr_set(netdev, addr->sa_data);
+
+	addr_lo = netdev->dev_addr[0] |
+		  netdev->dev_addr[1] << 8 |
+		  netdev->dev_addr[2] << 16 |
+		  netdev->dev_addr[3] << 24;
+	addr_hi = netdev->dev_addr[4] |
+		  netdev->dev_addr[5] << 8;
+
+	lan78xx_write_reg(dev, RX_ADDRL, addr_lo);
+	lan78xx_write_reg(dev, RX_ADDRH, addr_hi);
+
+	/* Added to support MAC address changes */
+	lan78xx_write_reg(dev, MAF_LO(0), addr_lo);
+	lan78xx_write_reg(dev, MAF_HI(0), addr_hi | MAF_HI_VALID_);
+
+	return 0;
+}
+
+/* Enable or disable Rx checksum offload engine */
+static int lan78xx_set_features(struct net_device *netdev,
+				netdev_features_t features)
+{
+	struct lan78xx_net *dev = netdev_priv(netdev);
+	struct lan78xx_priv *pdata = (struct lan78xx_priv *)(dev->data[0]);
+	unsigned long flags;
+
+	spin_lock_irqsave(&pdata->rfe_ctl_lock, flags);
+
+	if (features & NETIF_F_RXCSUM) {
+		pdata->rfe_ctl |= RFE_CTL_TCPUDP_COE_ | RFE_CTL_IP_COE_;
+		pdata->rfe_ctl |= RFE_CTL_ICMP_COE_ | RFE_CTL_IGMP_COE_;
+	} else {
+		pdata->rfe_ctl &= ~(RFE_CTL_TCPUDP_COE_ | RFE_CTL_IP_COE_);
+		pdata->rfe_ctl &= ~(RFE_CTL_ICMP_COE_ | RFE_CTL_IGMP_COE_);
+	}
+
+	if (features & NETIF_F_HW_VLAN_CTAG_RX)
+		pdata->rfe_ctl |= RFE_CTL_VLAN_STRIP_;
+	else
+		pdata->rfe_ctl &= ~RFE_CTL_VLAN_STRIP_;
+
+	if (features & NETIF_F_HW_VLAN_CTAG_FILTER)
+		pdata->rfe_ctl |= RFE_CTL_VLAN_FILTER_;
+	else
+		pdata->rfe_ctl &= ~RFE_CTL_VLAN_FILTER_;
+
+	spin_unlock_irqrestore(&pdata->rfe_ctl_lock, flags);
+
+	lan78xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
+
+	return 0;
+}
+
+static void lan78xx_deferred_vlan_write(struct work_struct *param)
+{
+	struct lan78xx_priv *pdata =
+			container_of(param, struct lan78xx_priv, set_vlan);
+	struct lan78xx_net *dev = pdata->dev;
+
+	lan78xx_dataport_write(dev, DP_SEL_RSEL_VLAN_DA_, 0,
+			       DP_SEL_VHF_VLAN_LEN, pdata->vlan_table);
+}
+
+static int lan78xx_vlan_rx_add_vid(struct net_device *netdev,
+				   __be16 proto, u16 vid)
+{
+	struct lan78xx_net *dev = netdev_priv(netdev);
+	struct lan78xx_priv *pdata = (struct lan78xx_priv *)(dev->data[0]);
+	u16 vid_bit_index;
+	u16 vid_dword_index;
+
+	vid_dword_index = (vid >> 5) & 0x7F;
+	vid_bit_index = vid & 0x1F;
+
+	pdata->vlan_table[vid_dword_index] |= (1 << vid_bit_index);
+
+	/* defer register writes to a sleepable context */
+	schedule_work(&pdata->set_vlan);
+
+	return 0;
+}
+
+static int lan78xx_vlan_rx_kill_vid(struct net_device *netdev,
+				    __be16 proto, u16 vid)
+{
+	struct lan78xx_net *dev = netdev_priv(netdev);
+	struct lan78xx_priv *pdata = (struct lan78xx_priv *)(dev->data[0]);
+	u16 vid_bit_index;
+	u16 vid_dword_index;
+
+	vid_dword_index = (vid >> 5) & 0x7F;
+	vid_bit_index = vid & 0x1F;
+
+	pdata->vlan_table[vid_dword_index] &= ~(1 << vid_bit_index);
+
+	/* defer register writes to a sleepable context */
+	schedule_work(&pdata->set_vlan);
+
+	return 0;
+}
+
+static void lan78xx_init_ltm(struct lan78xx_net *dev)
+{
+	int ret;
+	u32 buf;
+	u32 regs[6] = { 0 };
+
+	ret = lan78xx_read_reg(dev, USB_CFG1, &buf);
+	if (buf & USB_CFG1_LTM_ENABLE_) {
+		u8 temp[2];
+		/* Get values from EEPROM first */
+		if (lan78xx_read_eeprom(dev, 0x3F, 2, temp) == 0) {
+			if (temp[0] == 24) {
+				ret = lan78xx_read_raw_eeprom(dev,
+							      temp[1] * 2,
+							      24,
+							      (u8 *)regs);
+				if (ret < 0)
+					return;
+			}
+		} else if (lan78xx_read_otp(dev, 0x3F, 2, temp) == 0) {
+			if (temp[0] == 24) {
+				ret = lan78xx_read_raw_otp(dev,
+							   temp[1] * 2,
+							   24,
+							   (u8 *)regs);
+				if (ret < 0)
+					return;
+			}
+		}
+	}
+
+	lan78xx_write_reg(dev, LTM_BELT_IDLE0, regs[0]);
+	lan78xx_write_reg(dev, LTM_BELT_IDLE1, regs[1]);
+	lan78xx_write_reg(dev, LTM_BELT_ACT0, regs[2]);
+	lan78xx_write_reg(dev, LTM_BELT_ACT1, regs[3]);
+	lan78xx_write_reg(dev, LTM_INACTIVE0, regs[4]);
+	lan78xx_write_reg(dev, LTM_INACTIVE1, regs[5]);
+}
+
+static int lan78xx_urb_config_init(struct lan78xx_net *dev)
+{
+	int result = 0;
+
+	switch (dev->udev->speed) {
+	case USB_SPEED_SUPER:
+		dev->rx_urb_size = RX_SS_URB_SIZE;
+		dev->tx_urb_size = TX_SS_URB_SIZE;
+		dev->n_rx_urbs = RX_SS_URB_NUM;
+		dev->n_tx_urbs = TX_SS_URB_NUM;
+		dev->bulk_in_delay = SS_BULK_IN_DELAY;
+		dev->burst_cap = SS_BURST_CAP_SIZE / SS_USB_PKT_SIZE;
+		break;
+	case USB_SPEED_HIGH:
+		dev->rx_urb_size = RX_HS_URB_SIZE;
+		dev->tx_urb_size = TX_HS_URB_SIZE;
+		dev->n_rx_urbs = RX_HS_URB_NUM;
+		dev->n_tx_urbs = TX_HS_URB_NUM;
+		dev->bulk_in_delay = HS_BULK_IN_DELAY;
+		dev->burst_cap = HS_BURST_CAP_SIZE / HS_USB_PKT_SIZE;
+		break;
+	case USB_SPEED_FULL:
+		dev->rx_urb_size = RX_FS_URB_SIZE;
+		dev->tx_urb_size = TX_FS_URB_SIZE;
+		dev->n_rx_urbs = RX_FS_URB_NUM;
+		dev->n_tx_urbs = TX_FS_URB_NUM;
+		dev->bulk_in_delay = FS_BULK_IN_DELAY;
+		dev->burst_cap = FS_BURST_CAP_SIZE / FS_USB_PKT_SIZE;
+		break;
+	default:
+		netdev_warn(dev->net, "USB bus speed not supported\n");
+		result = -EIO;
+		break;
+	}
+
+	return result;
+}
+
+static int lan78xx_start_hw(struct lan78xx_net *dev, u32 reg, u32 hw_enable)
+{
+	return lan78xx_update_reg(dev, reg, hw_enable, hw_enable);
+}
+
+static int lan78xx_stop_hw(struct lan78xx_net *dev, u32 reg, u32 hw_enabled,
+			   u32 hw_disabled)
+{
+	unsigned long timeout;
+	bool stopped = true;
+	int ret;
+	u32 buf;
+
+	/* Stop the h/w block (if not already stopped) */
+
+	ret = lan78xx_read_reg(dev, reg, &buf);
+	if (ret < 0)
+		return ret;
+
+	if (buf & hw_enabled) {
+		buf &= ~hw_enabled;
+
+		ret = lan78xx_write_reg(dev, reg, buf);
+		if (ret < 0)
+			return ret;
+
+		stopped = false;
+		timeout = jiffies + HW_DISABLE_TIMEOUT;
+		do  {
+			ret = lan78xx_read_reg(dev, reg, &buf);
+			if (ret < 0)
+				return ret;
+
+			if (buf & hw_disabled)
+				stopped = true;
+			else
+				msleep(HW_DISABLE_DELAY_MS);
+		} while (!stopped && !time_after(jiffies, timeout));
+	}
+
+	ret = stopped ? 0 : -ETIME;
+
+	return ret;
+}
+
+static int lan78xx_flush_fifo(struct lan78xx_net *dev, u32 reg, u32 fifo_flush)
+{
+	return lan78xx_update_reg(dev, reg, fifo_flush, fifo_flush);
+}
+
+static int lan78xx_start_tx_path(struct lan78xx_net *dev)
+{
+	int ret;
+
+	netif_dbg(dev, drv, dev->net, "start tx path");
+
+	/* Start the MAC transmitter */
+
+	ret = lan78xx_start_hw(dev, MAC_TX, MAC_TX_TXEN_);
+	if (ret < 0)
+		return ret;
+
+	/* Start the Tx FIFO */
+
+	ret = lan78xx_start_hw(dev, FCT_TX_CTL, FCT_TX_CTL_EN_);
+	if (ret < 0)
+		return ret;
+
+	return 0;
+}
+
+static int lan78xx_stop_tx_path(struct lan78xx_net *dev)
+{
+	int ret;
+
+	netif_dbg(dev, drv, dev->net, "stop tx path");
+
+	/* Stop the Tx FIFO */
+
+	ret = lan78xx_stop_hw(dev, FCT_TX_CTL, FCT_TX_CTL_EN_, FCT_TX_CTL_DIS_);
+	if (ret < 0)
+		return ret;
+
+	/* Stop the MAC transmitter */
+
+	ret = lan78xx_stop_hw(dev, MAC_TX, MAC_TX_TXEN_, MAC_TX_TXD_);
+	if (ret < 0)
+		return ret;
+
+	return 0;
+}
+
+/* The caller must ensure the Tx path is stopped before calling
+ * lan78xx_flush_tx_fifo().
+ */
+static int lan78xx_flush_tx_fifo(struct lan78xx_net *dev)
+{
+	return lan78xx_flush_fifo(dev, FCT_TX_CTL, FCT_TX_CTL_RST_);
+}
+
+static int lan78xx_start_rx_path(struct lan78xx_net *dev)
+{
+	int ret;
+
+	netif_dbg(dev, drv, dev->net, "start rx path");
+
+	/* Start the Rx FIFO */
+
+	ret = lan78xx_start_hw(dev, FCT_RX_CTL, FCT_RX_CTL_EN_);
+	if (ret < 0)
+		return ret;
+
+	/* Start the MAC receiver*/
+
+	ret = lan78xx_start_hw(dev, MAC_RX, MAC_RX_RXEN_);
+	if (ret < 0)
+		return ret;
+
+	return 0;
+}
+
+static int lan78xx_stop_rx_path(struct lan78xx_net *dev)
+{
+	int ret;
+
+	netif_dbg(dev, drv, dev->net, "stop rx path");
+
+	/* Stop the MAC receiver */
+
+	ret = lan78xx_stop_hw(dev, MAC_RX, MAC_RX_RXEN_, MAC_RX_RXD_);
+	if (ret < 0)
+		return ret;
+
+	/* Stop the Rx FIFO */
+
+	ret = lan78xx_stop_hw(dev, FCT_RX_CTL, FCT_RX_CTL_EN_, FCT_RX_CTL_DIS_);
+	if (ret < 0)
+		return ret;
+
+	return 0;
+}
+
+/* The caller must ensure the Rx path is stopped before calling
+ * lan78xx_flush_rx_fifo().
+ */
+static int lan78xx_flush_rx_fifo(struct lan78xx_net *dev)
+{
+	return lan78xx_flush_fifo(dev, FCT_RX_CTL, FCT_RX_CTL_RST_);
+}
+
+static int lan78xx_reset(struct lan78xx_net *dev)
+{
+	struct lan78xx_priv *pdata = (struct lan78xx_priv *)(dev->data[0]);
+	unsigned long timeout;
+	int ret;
+	u32 buf;
+	u8 sig;
+
+	ret = lan78xx_read_reg(dev, HW_CFG, &buf);
+	if (ret < 0)
+		return ret;
+
+	buf |= HW_CFG_LRST_;
+
+	ret = lan78xx_write_reg(dev, HW_CFG, buf);
+	if (ret < 0)
+		return ret;
+
+	timeout = jiffies + HZ;
+	do {
+		mdelay(1);
+		ret = lan78xx_read_reg(dev, HW_CFG, &buf);
+		if (ret < 0)
+			return ret;
+
+		if (time_after(jiffies, timeout)) {
+			netdev_warn(dev->net,
+				    "timeout on completion of LiteReset");
+			ret = -ETIMEDOUT;
+			return ret;
+		}
+	} while (buf & HW_CFG_LRST_);
+
+	lan78xx_init_mac_address(dev);
+
+	/* save DEVID for later usage */
+	ret = lan78xx_read_reg(dev, ID_REV, &buf);
+	if (ret < 0)
+		return ret;
+
+	dev->chipid = (buf & ID_REV_CHIP_ID_MASK_) >> 16;
+	dev->chiprev = buf & ID_REV_CHIP_REV_MASK_;
+
+	/* Respond to the IN token with a NAK */
+	ret = lan78xx_read_reg(dev, USB_CFG0, &buf);
+	if (ret < 0)
+		return ret;
+
+	buf |= USB_CFG_BIR_;
+
+	ret = lan78xx_write_reg(dev, USB_CFG0, buf);
+	if (ret < 0)
+		return ret;
+
+	/* Init LTM */
+	lan78xx_init_ltm(dev);
+
+	ret = lan78xx_write_reg(dev, BURST_CAP, dev->burst_cap);
+	if (ret < 0)
+		return ret;
+
+	ret = lan78xx_write_reg(dev, BULK_IN_DLY, dev->bulk_in_delay);
+	if (ret < 0)
+		return ret;
+
+	ret = lan78xx_read_reg(dev, HW_CFG, &buf);
+	if (ret < 0)
+		return ret;
+
+	buf |= HW_CFG_MEF_;
+
+	ret = lan78xx_write_reg(dev, HW_CFG, buf);
+	if (ret < 0)
+		return ret;
+
+	ret = lan78xx_read_reg(dev, USB_CFG0, &buf);
+	if (ret < 0)
+		return ret;
+
+	buf |= USB_CFG_BCE_;
+
+	ret = lan78xx_write_reg(dev, USB_CFG0, buf);
+	if (ret < 0)
+		return ret;
+
+	/* set FIFO sizes */
+	buf = (MAX_RX_FIFO_SIZE - 512) / 512;
+
+	ret = lan78xx_write_reg(dev, FCT_RX_FIFO_END, buf);
+	if (ret < 0)
+		return ret;
+
+	buf = (MAX_TX_FIFO_SIZE - 512) / 512;
+
+	ret = lan78xx_write_reg(dev, FCT_TX_FIFO_END, buf);
+	if (ret < 0)
+		return ret;
+
+	ret = lan78xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL_);
+	if (ret < 0)
+		return ret;
+
+	ret = lan78xx_write_reg(dev, FLOW, 0);
+	if (ret < 0)
+		return ret;
+
+	ret = lan78xx_write_reg(dev, FCT_FLOW, 0);
+	if (ret < 0)
+		return ret;
+
+	/* Don't need rfe_ctl_lock during initialisation */
+	ret = lan78xx_read_reg(dev, RFE_CTL, &pdata->rfe_ctl);
+	if (ret < 0)
+		return ret;
+
+	pdata->rfe_ctl |= RFE_CTL_BCAST_EN_ | RFE_CTL_DA_PERFECT_;
+
+	ret = lan78xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
+	if (ret < 0)
+		return ret;
+
+	/* Enable or disable checksum offload engines */
+	ret = lan78xx_set_features(dev->net, dev->net->features);
+	if (ret < 0)
+		return ret;
+
+	lan78xx_set_multicast(dev->net);
+
+	/* reset PHY */
+	ret = lan78xx_read_reg(dev, PMT_CTL, &buf);
+	if (ret < 0)
+		return ret;
+
+	buf |= PMT_CTL_PHY_RST_;
+
+	ret = lan78xx_write_reg(dev, PMT_CTL, buf);
+	if (ret < 0)
+		return ret;
+
+	timeout = jiffies + HZ;
+	do {
+		mdelay(1);
+		ret = lan78xx_read_reg(dev, PMT_CTL, &buf);
+		if (ret < 0)
+			return ret;
+
+		if (time_after(jiffies, timeout)) {
+			netdev_warn(dev->net, "timeout waiting for PHY Reset");
+			ret = -ETIMEDOUT;
+			return ret;
+		}
+	} while ((buf & PMT_CTL_PHY_RST_) || !(buf & PMT_CTL_READY_));
+
+	ret = lan78xx_read_reg(dev, MAC_CR, &buf);
+	if (ret < 0)
+		return ret;
+
+	/* LAN7801 only has RGMII mode */
+	if (dev->chipid == ID_REV_CHIP_ID_7801_)
+		buf &= ~MAC_CR_GMII_EN_;
+
+	if (dev->chipid == ID_REV_CHIP_ID_7800_) {
+		ret = lan78xx_read_raw_eeprom(dev, 0, 1, &sig);
+		if (!ret && sig != EEPROM_INDICATOR) {
+			/* Implies there is no external eeprom. Set mac speed */
+			netdev_info(dev->net, "No External EEPROM. Setting MAC Speed\n");
+			buf |= MAC_CR_AUTO_DUPLEX_ | MAC_CR_AUTO_SPEED_;
+		}
+	}
+	ret = lan78xx_write_reg(dev, MAC_CR, buf);
+	if (ret < 0)
+		return ret;
+
+	ret = lan78xx_set_rx_max_frame_length(dev,
+					      RX_MAX_FRAME_LEN(dev->net->mtu));
+
+	return ret;
+}
+
+static void lan78xx_init_stats(struct lan78xx_net *dev)
+{
+	u32 *p;
+	int i;
+
+	/* initialize for stats update
+	 * some counters are 20bits and some are 32bits
+	 */
+	p = (u32 *)&dev->stats.rollover_max;
+	for (i = 0; i < (sizeof(dev->stats.rollover_max) / (sizeof(u32))); i++)
+		p[i] = 0xFFFFF;
+
+	dev->stats.rollover_max.rx_unicast_byte_count = 0xFFFFFFFF;
+	dev->stats.rollover_max.rx_broadcast_byte_count = 0xFFFFFFFF;
+	dev->stats.rollover_max.rx_multicast_byte_count = 0xFFFFFFFF;
+	dev->stats.rollover_max.eee_rx_lpi_transitions = 0xFFFFFFFF;
+	dev->stats.rollover_max.eee_rx_lpi_time = 0xFFFFFFFF;
+	dev->stats.rollover_max.tx_unicast_byte_count = 0xFFFFFFFF;
+	dev->stats.rollover_max.tx_broadcast_byte_count = 0xFFFFFFFF;
+	dev->stats.rollover_max.tx_multicast_byte_count = 0xFFFFFFFF;
+	dev->stats.rollover_max.eee_tx_lpi_transitions = 0xFFFFFFFF;
+	dev->stats.rollover_max.eee_tx_lpi_time = 0xFFFFFFFF;
+
+	set_bit(EVENT_STAT_UPDATE, &dev->flags);
+}
+
+static int lan78xx_open(struct net_device *net)
+{
+	struct lan78xx_net *dev = netdev_priv(net);
+	int ret;
+
+	netif_dbg(dev, ifup, dev->net, "open device");
+
+	ret = usb_autopm_get_interface(dev->intf);
+	if (ret < 0)
+		return ret;
+
+	mutex_lock(&dev->dev_mutex);
+
+	phy_start(net->phydev);
+
+	netif_dbg(dev, ifup, dev->net, "phy initialised successfully");
+
+	/* for Link Check */
+	if (dev->urb_intr) {
+		ret = usb_submit_urb(dev->urb_intr, GFP_KERNEL);
+		if (ret < 0) {
+			netif_err(dev, ifup, dev->net,
+				  "intr submit %d\n", ret);
+			goto done;
+		}
+	}
+
+	ret = lan78xx_flush_rx_fifo(dev);
+	if (ret < 0)
+		goto done;
+	ret = lan78xx_flush_tx_fifo(dev);
+	if (ret < 0)
+		goto done;
+
+	ret = lan78xx_start_tx_path(dev);
+	if (ret < 0)
+		goto done;
+	ret = lan78xx_start_rx_path(dev);
+	if (ret < 0)
+		goto done;
+
+	lan78xx_init_stats(dev);
+
+	set_bit(EVENT_DEV_OPEN, &dev->flags);
+
+	netif_start_queue(net);
+
+	dev->link_on = false;
+
+	napi_enable(&dev->napi);
+
+	lan78xx_defer_kevent(dev, EVENT_LINK_RESET);
+done:
+	mutex_unlock(&dev->dev_mutex);
+
+	usb_autopm_put_interface(dev->intf);
+
+	return ret;
+}
+
+static void lan78xx_terminate_urbs(struct lan78xx_net *dev)
+{
+	DECLARE_WAIT_QUEUE_HEAD_ONSTACK(unlink_wakeup);
+	DECLARE_WAITQUEUE(wait, current);
+	int temp;
+
+	/* ensure there are no more active urbs */
+	add_wait_queue(&unlink_wakeup, &wait);
+	set_current_state(TASK_UNINTERRUPTIBLE);
+	dev->wait = &unlink_wakeup;
+	temp = unlink_urbs(dev, &dev->txq) + unlink_urbs(dev, &dev->rxq);
+
+	/* maybe wait for deletions to finish. */
+	while (!skb_queue_empty(&dev->rxq) ||
+	       !skb_queue_empty(&dev->txq)) {
+		schedule_timeout(msecs_to_jiffies(UNLINK_TIMEOUT_MS));
+		set_current_state(TASK_UNINTERRUPTIBLE);
+		netif_dbg(dev, ifdown, dev->net,
+			  "waited for %d urb completions", temp);
+	}
+	set_current_state(TASK_RUNNING);
+	dev->wait = NULL;
+	remove_wait_queue(&unlink_wakeup, &wait);
+
+	/* empty Rx done, Rx overflow and Tx pend queues
+	 */
+	while (!skb_queue_empty(&dev->rxq_done)) {
+		struct sk_buff *skb = skb_dequeue(&dev->rxq_done);
+
+		lan78xx_release_rx_buf(dev, skb);
+	}
+
+	skb_queue_purge(&dev->rxq_overflow);
+	skb_queue_purge(&dev->txq_pend);
+}
+
+static int lan78xx_stop(struct net_device *net)
+{
+	struct lan78xx_net *dev = netdev_priv(net);
+
+	netif_dbg(dev, ifup, dev->net, "stop device");
+
+	mutex_lock(&dev->dev_mutex);
+
+	if (timer_pending(&dev->stat_monitor))
+		del_timer_sync(&dev->stat_monitor);
+
+	clear_bit(EVENT_DEV_OPEN, &dev->flags);
+	netif_stop_queue(net);
+	napi_disable(&dev->napi);
+
+	lan78xx_terminate_urbs(dev);
+
+	netif_info(dev, ifdown, dev->net,
+		   "stop stats: rx/tx %lu/%lu, errs %lu/%lu\n",
+		   net->stats.rx_packets, net->stats.tx_packets,
+		   net->stats.rx_errors, net->stats.tx_errors);
+
+	/* ignore errors that occur stopping the Tx and Rx data paths */
+	lan78xx_stop_tx_path(dev);
+	lan78xx_stop_rx_path(dev);
+
+	if (net->phydev)
+		phy_stop(net->phydev);
+
+	usb_kill_urb(dev->urb_intr);
+
+	/* deferred work (task, timer, softirq) must also stop.
+	 * can't flush_scheduled_work() until we drop rtnl (later),
+	 * else workers could deadlock; so make workers a NOP.
+	 */
+	clear_bit(EVENT_TX_HALT, &dev->flags);
+	clear_bit(EVENT_RX_HALT, &dev->flags);
+	clear_bit(EVENT_LINK_RESET, &dev->flags);
+	clear_bit(EVENT_STAT_UPDATE, &dev->flags);
+
+	cancel_delayed_work_sync(&dev->wq);
+
+	usb_autopm_put_interface(dev->intf);
+
+	mutex_unlock(&dev->dev_mutex);
+
+	return 0;
+}
+
+static enum skb_state defer_bh(struct lan78xx_net *dev, struct sk_buff *skb,
+			       struct sk_buff_head *list, enum skb_state state)
+{
+	unsigned long flags;
+	enum skb_state old_state;
+	struct skb_data *entry = (struct skb_data *)skb->cb;
+
+	spin_lock_irqsave(&list->lock, flags);
+	old_state = entry->state;
+	entry->state = state;
+
+	__skb_unlink(skb, list);
+	spin_unlock(&list->lock);
+	spin_lock(&dev->rxq_done.lock);
+
+	__skb_queue_tail(&dev->rxq_done, skb);
+	if (skb_queue_len(&dev->rxq_done) == 1)
+		napi_schedule(&dev->napi);
+
+	spin_unlock_irqrestore(&dev->rxq_done.lock, flags);
+
+	return old_state;
+}
+
+static void tx_complete(struct urb *urb)
+{
+	struct sk_buff *skb = (struct sk_buff *)urb->context;
+	struct skb_data *entry = (struct skb_data *)skb->cb;
+	struct lan78xx_net *dev = entry->dev;
+
+	if (urb->status == 0) {
+		dev->net->stats.tx_packets += entry->num_of_packet;
+		dev->net->stats.tx_bytes += entry->length;
+	} else {
+		dev->net->stats.tx_errors += entry->num_of_packet;
+
+		switch (urb->status) {
+		case -EPIPE:
+			lan78xx_defer_kevent(dev, EVENT_TX_HALT);
+			break;
+
+		/* software-driven interface shutdown */
+		case -ECONNRESET:
+		case -ESHUTDOWN:
+			netif_dbg(dev, tx_err, dev->net,
+				  "tx err interface gone %d\n",
+				  entry->urb->status);
+			break;
+
+		case -EPROTO:
+		case -ETIME:
+		case -EILSEQ:
+			netif_stop_queue(dev->net);
+			netif_dbg(dev, tx_err, dev->net,
+				  "tx err queue stopped %d\n",
+				  entry->urb->status);
+			break;
+		default:
+			netif_dbg(dev, tx_err, dev->net,
+				  "unknown tx err %d\n",
+				  entry->urb->status);
+			break;
+		}
+	}
+
+	usb_autopm_put_interface_async(dev->intf);
+
+	skb_unlink(skb, &dev->txq);
+
+	lan78xx_release_tx_buf(dev, skb);
+
+	/* Re-schedule NAPI if Tx data pending but no URBs in progress.
+	 */
+	if (skb_queue_empty(&dev->txq) &&
+	    !skb_queue_empty(&dev->txq_pend))
+		napi_schedule(&dev->napi);
+}
+
+static void lan78xx_queue_skb(struct sk_buff_head *list,
+			      struct sk_buff *newsk, enum skb_state state)
+{
+	struct skb_data *entry = (struct skb_data *)newsk->cb;
+
+	__skb_queue_tail(list, newsk);
+	entry->state = state;
+}
+
+static unsigned int lan78xx_tx_urb_space(struct lan78xx_net *dev)
+{
+	return skb_queue_len(&dev->txq_free) * dev->tx_urb_size;
+}
+
+static unsigned int lan78xx_tx_pend_data_len(struct lan78xx_net *dev)
+{
+	return dev->tx_pend_data_len;
+}
+
+static void lan78xx_tx_pend_skb_add(struct lan78xx_net *dev,
+				    struct sk_buff *skb,
+				    unsigned int *tx_pend_data_len)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&dev->txq_pend.lock, flags);
+
+	__skb_queue_tail(&dev->txq_pend, skb);
+
+	dev->tx_pend_data_len += skb->len;
+	*tx_pend_data_len = dev->tx_pend_data_len;
+
+	spin_unlock_irqrestore(&dev->txq_pend.lock, flags);
+}
+
+static void lan78xx_tx_pend_skb_head_add(struct lan78xx_net *dev,
+					 struct sk_buff *skb,
+					 unsigned int *tx_pend_data_len)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&dev->txq_pend.lock, flags);
+
+	__skb_queue_head(&dev->txq_pend, skb);
+
+	dev->tx_pend_data_len += skb->len;
+	*tx_pend_data_len = dev->tx_pend_data_len;
+
+	spin_unlock_irqrestore(&dev->txq_pend.lock, flags);
+}
+
+static void lan78xx_tx_pend_skb_get(struct lan78xx_net *dev,
+				    struct sk_buff **skb,
+				    unsigned int *tx_pend_data_len)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&dev->txq_pend.lock, flags);
+
+	*skb = __skb_dequeue(&dev->txq_pend);
+	if (*skb)
+		dev->tx_pend_data_len -= (*skb)->len;
+	*tx_pend_data_len = dev->tx_pend_data_len;
+
+	spin_unlock_irqrestore(&dev->txq_pend.lock, flags);
+}
+
+static netdev_tx_t
+lan78xx_start_xmit(struct sk_buff *skb, struct net_device *net)
+{
+	struct lan78xx_net *dev = netdev_priv(net);
+	unsigned int tx_pend_data_len;
+
+	if (test_bit(EVENT_DEV_ASLEEP, &dev->flags))
+		schedule_delayed_work(&dev->wq, 0);
+
+	skb_tx_timestamp(skb);
+
+	lan78xx_tx_pend_skb_add(dev, skb, &tx_pend_data_len);
+
+	/* Set up a Tx URB if none is in progress */
+
+	if (skb_queue_empty(&dev->txq))
+		napi_schedule(&dev->napi);
+
+	/* Stop stack Tx queue if we have enough data to fill
+	 * all the free Tx URBs.
+	 */
+	if (tx_pend_data_len > lan78xx_tx_urb_space(dev)) {
+		netif_stop_queue(net);
+
+		netif_dbg(dev, hw, dev->net, "tx data len: %u, urb space %u",
+			  tx_pend_data_len, lan78xx_tx_urb_space(dev));
+
+		/* Kick off transmission of pending data */
+
+		if (!skb_queue_empty(&dev->txq_free))
+			napi_schedule(&dev->napi);
+	}
+
+	return NETDEV_TX_OK;
+}
+
+static int lan78xx_bind(struct lan78xx_net *dev, struct usb_interface *intf)
+{
+	struct lan78xx_priv *pdata = NULL;
+	int ret;
+	int i;
+
+	dev->data[0] = (unsigned long)kzalloc(sizeof(*pdata), GFP_KERNEL);
+
+	pdata = (struct lan78xx_priv *)(dev->data[0]);
+	if (!pdata) {
+		netdev_warn(dev->net, "Unable to allocate lan78xx_priv");
+		return -ENOMEM;
+	}
+
+	pdata->dev = dev;
+
+	spin_lock_init(&pdata->rfe_ctl_lock);
+	mutex_init(&pdata->dataport_mutex);
+
+	INIT_WORK(&pdata->set_multicast, lan78xx_deferred_multicast_write);
+
+	for (i = 0; i < DP_SEL_VHF_VLAN_LEN; i++)
+		pdata->vlan_table[i] = 0;
+
+	INIT_WORK(&pdata->set_vlan, lan78xx_deferred_vlan_write);
+
+	dev->net->features = 0;
+
+	if (DEFAULT_TX_CSUM_ENABLE)
+		dev->net->features |= NETIF_F_HW_CSUM;
+
+	if (DEFAULT_RX_CSUM_ENABLE)
+		dev->net->features |= NETIF_F_RXCSUM;
+
+	if (DEFAULT_TSO_CSUM_ENABLE)
+		dev->net->features |= NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_SG;
+
+	if (DEFAULT_VLAN_RX_OFFLOAD)
+		dev->net->features |= NETIF_F_HW_VLAN_CTAG_RX;
+
+	if (DEFAULT_VLAN_FILTER_ENABLE)
+		dev->net->features |= NETIF_F_HW_VLAN_CTAG_FILTER;
+
+	dev->net->hw_features = dev->net->features;
+
+	ret = lan78xx_setup_irq_domain(dev);
+	if (ret < 0) {
+		netdev_warn(dev->net,
+			    "lan78xx_setup_irq_domain() failed : %d", ret);
+		goto out1;
+	}
+
+	/* Init all registers */
+	ret = lan78xx_reset(dev);
+	if (ret) {
+		netdev_warn(dev->net, "Registers INIT FAILED....");
+		goto out2;
+	}
+
+	ret = lan78xx_mdio_init(dev);
+	if (ret) {
+		netdev_warn(dev->net, "MDIO INIT FAILED.....");
+		goto out2;
+	}
+
+	dev->net->flags |= IFF_MULTICAST;
+
+	pdata->wol = WAKE_MAGIC;
+
+	return ret;
+
+out2:
+	lan78xx_remove_irq_domain(dev);
+
+out1:
+	netdev_warn(dev->net, "Bind routine FAILED");
+	cancel_work_sync(&pdata->set_multicast);
+	cancel_work_sync(&pdata->set_vlan);
+	kfree(pdata);
+	return ret;
+}
+
+static void lan78xx_unbind(struct lan78xx_net *dev, struct usb_interface *intf)
+{
+	struct lan78xx_priv *pdata = (struct lan78xx_priv *)(dev->data[0]);
+
+	lan78xx_remove_irq_domain(dev);
+
+	lan78xx_remove_mdio(dev);
+
+	if (pdata) {
+		cancel_work_sync(&pdata->set_multicast);
+		cancel_work_sync(&pdata->set_vlan);
+		netif_dbg(dev, ifdown, dev->net, "free pdata");
+		kfree(pdata);
+		pdata = NULL;
+		dev->data[0] = 0;
+	}
+}
+
+static void lan78xx_rx_csum_offload(struct lan78xx_net *dev,
+				    struct sk_buff *skb,
+				    u32 rx_cmd_a, u32 rx_cmd_b)
+{
+	/* HW Checksum offload appears to be flawed if used when not stripping
+	 * VLAN headers. Drop back to S/W checksums under these conditions.
+	 */
+	if (!(dev->net->features & NETIF_F_RXCSUM) ||
+	    unlikely(rx_cmd_a & RX_CMD_A_ICSM_) ||
+	    ((rx_cmd_a & RX_CMD_A_FVTG_) &&
+	     !(dev->net->features & NETIF_F_HW_VLAN_CTAG_RX))) {
+		skb->ip_summed = CHECKSUM_NONE;
+	} else {
+		skb->csum = ntohs((u16)(rx_cmd_b >> RX_CMD_B_CSUM_SHIFT_));
+		skb->ip_summed = CHECKSUM_COMPLETE;
+	}
+}
+
+static void lan78xx_rx_vlan_offload(struct lan78xx_net *dev,
+				    struct sk_buff *skb,
+				    u32 rx_cmd_a, u32 rx_cmd_b)
+{
+	if ((dev->net->features & NETIF_F_HW_VLAN_CTAG_RX) &&
+	    (rx_cmd_a & RX_CMD_A_FVTG_))
+		__vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
+				       (rx_cmd_b & 0xffff));
+}
+
+static void lan78xx_skb_return(struct lan78xx_net *dev, struct sk_buff *skb)
+{
+	dev->net->stats.rx_packets++;
+	dev->net->stats.rx_bytes += skb->len;
+
+	skb->protocol = eth_type_trans(skb, dev->net);
+
+	netif_dbg(dev, rx_status, dev->net, "< rx, len %zu, type 0x%x\n",
+		  skb->len + sizeof(struct ethhdr), skb->protocol);
+	memset(skb->cb, 0, sizeof(struct skb_data));
+
+	if (skb_defer_rx_timestamp(skb))
+		return;
+
+	napi_gro_receive(&dev->napi, skb);
+}
+
+static int lan78xx_rx(struct lan78xx_net *dev, struct sk_buff *skb,
+		      int budget, int *work_done)
+{
+	if (skb->len < RX_SKB_MIN_LEN)
+		return 0;
+
+	/* Extract frames from the URB buffer and pass each one to
+	 * the stack in a new NAPI SKB.
+	 */
+	while (skb->len > 0) {
+		u32 rx_cmd_a, rx_cmd_b, align_count, size;
+		u16 rx_cmd_c;
+		unsigned char *packet;
+
+		rx_cmd_a = get_unaligned_le32(skb->data);
+		skb_pull(skb, sizeof(rx_cmd_a));
+
+		rx_cmd_b = get_unaligned_le32(skb->data);
+		skb_pull(skb, sizeof(rx_cmd_b));
+
+		rx_cmd_c = get_unaligned_le16(skb->data);
+		skb_pull(skb, sizeof(rx_cmd_c));
+
+		packet = skb->data;
+
+		/* get the packet length */
+		size = (rx_cmd_a & RX_CMD_A_LEN_MASK_);
+		align_count = (4 - ((size + RXW_PADDING) % 4)) % 4;
+
+		if (unlikely(size > skb->len)) {
+			netif_dbg(dev, rx_err, dev->net,
+				  "size err rx_cmd_a=0x%08x\n",
+				  rx_cmd_a);
+			return 0;
+		}
+
+		if (unlikely(rx_cmd_a & RX_CMD_A_RED_)) {
+			netif_dbg(dev, rx_err, dev->net,
+				  "Error rx_cmd_a=0x%08x", rx_cmd_a);
+		} else {
+			u32 frame_len;
+			struct sk_buff *skb2;
+
+			if (unlikely(size < ETH_FCS_LEN)) {
+				netif_dbg(dev, rx_err, dev->net,
+					  "size err rx_cmd_a=0x%08x\n",
+					  rx_cmd_a);
+				return 0;
+			}
+
+			frame_len = size - ETH_FCS_LEN;
+
+			skb2 = napi_alloc_skb(&dev->napi, frame_len);
+			if (!skb2)
+				return 0;
+
+			memcpy(skb2->data, packet, frame_len);
+
+			skb_put(skb2, frame_len);
+
+			lan78xx_rx_csum_offload(dev, skb2, rx_cmd_a, rx_cmd_b);
+			lan78xx_rx_vlan_offload(dev, skb2, rx_cmd_a, rx_cmd_b);
+
+			/* Processing of the URB buffer must complete once
+			 * it has started. If the NAPI work budget is exhausted
+			 * while frames remain they are added to the overflow
+			 * queue for delivery in the next NAPI polling cycle.
+			 */
+			if (*work_done < budget) {
+				lan78xx_skb_return(dev, skb2);
+				++(*work_done);
+			} else {
+				skb_queue_tail(&dev->rxq_overflow, skb2);
+			}
+		}
+
+		skb_pull(skb, size);
+
+		/* skip padding bytes before the next frame starts */
+		if (skb->len)
+			skb_pull(skb, align_count);
+	}
+
+	return 1;
+}
+
+static inline void rx_process(struct lan78xx_net *dev, struct sk_buff *skb,
+			      int budget, int *work_done)
+{
+	if (!lan78xx_rx(dev, skb, budget, work_done)) {
+		netif_dbg(dev, rx_err, dev->net, "drop\n");
+		dev->net->stats.rx_errors++;
+	}
+}
+
+static void rx_complete(struct urb *urb)
+{
+	struct sk_buff	*skb = (struct sk_buff *)urb->context;
+	struct skb_data	*entry = (struct skb_data *)skb->cb;
+	struct lan78xx_net *dev = entry->dev;
+	int urb_status = urb->status;
+	enum skb_state state;
+
+	netif_dbg(dev, rx_status, dev->net,
+		  "rx done: status %d", urb->status);
+
+	skb_put(skb, urb->actual_length);
+	state = rx_done;
+
+	if (urb != entry->urb)
+		netif_warn(dev, rx_err, dev->net, "URB pointer mismatch");
+
+	switch (urb_status) {
+	case 0:
+		if (skb->len < RX_SKB_MIN_LEN) {
+			state = rx_cleanup;
+			dev->net->stats.rx_errors++;
+			dev->net->stats.rx_length_errors++;
+			netif_dbg(dev, rx_err, dev->net,
+				  "rx length %d\n", skb->len);
+		}
+		usb_mark_last_busy(dev->udev);
+		break;
+	case -EPIPE:
+		dev->net->stats.rx_errors++;
+		lan78xx_defer_kevent(dev, EVENT_RX_HALT);
+		fallthrough;
+	case -ECONNRESET:				/* async unlink */
+	case -ESHUTDOWN:				/* hardware gone */
+		netif_dbg(dev, ifdown, dev->net,
+			  "rx shutdown, code %d\n", urb_status);
+		state = rx_cleanup;
+		break;
+	case -EPROTO:
+	case -ETIME:
+	case -EILSEQ:
+		dev->net->stats.rx_errors++;
+		state = rx_cleanup;
+		break;
+
+	/* data overrun ... flush fifo? */
+	case -EOVERFLOW:
+		dev->net->stats.rx_over_errors++;
+		fallthrough;
+
+	default:
+		state = rx_cleanup;
+		dev->net->stats.rx_errors++;
+		netif_dbg(dev, rx_err, dev->net, "rx status %d\n", urb_status);
+		break;
+	}
+
+	state = defer_bh(dev, skb, &dev->rxq, state);
+}
+
+static int rx_submit(struct lan78xx_net *dev, struct sk_buff *skb, gfp_t flags)
+{
+	struct skb_data	*entry = (struct skb_data *)skb->cb;
+	size_t size = dev->rx_urb_size;
+	struct urb *urb = entry->urb;
+	unsigned long lockflags;
+	int ret = 0;
+
+	usb_fill_bulk_urb(urb, dev->udev, dev->pipe_in,
+			  skb->data, size, rx_complete, skb);
+
+	spin_lock_irqsave(&dev->rxq.lock, lockflags);
+
+	if (netif_device_present(dev->net) &&
+	    netif_running(dev->net) &&
+	    !test_bit(EVENT_RX_HALT, &dev->flags) &&
+	    !test_bit(EVENT_DEV_ASLEEP, &dev->flags)) {
+		ret = usb_submit_urb(urb, flags);
+		switch (ret) {
+		case 0:
+			lan78xx_queue_skb(&dev->rxq, skb, rx_start);
+			break;
+		case -EPIPE:
+			lan78xx_defer_kevent(dev, EVENT_RX_HALT);
+			break;
+		case -ENODEV:
+		case -ENOENT:
+			netif_dbg(dev, ifdown, dev->net, "device gone\n");
+			netif_device_detach(dev->net);
+			break;
+		case -EHOSTUNREACH:
+			ret = -ENOLINK;
+			napi_schedule(&dev->napi);
+			break;
+		default:
+			netif_dbg(dev, rx_err, dev->net,
+				  "rx submit, %d\n", ret);
+			napi_schedule(&dev->napi);
+			break;
+		}
+	} else {
+		netif_dbg(dev, ifdown, dev->net, "rx: stopped\n");
+		ret = -ENOLINK;
+	}
+	spin_unlock_irqrestore(&dev->rxq.lock, lockflags);
+
+	if (ret)
+		lan78xx_release_rx_buf(dev, skb);
+
+	return ret;
+}
+
+static void lan78xx_rx_urb_submit_all(struct lan78xx_net *dev)
+{
+	struct sk_buff *rx_buf;
+
+	/* Ensure the maximum number of Rx URBs is submitted
+	 */
+	while ((rx_buf = lan78xx_get_rx_buf(dev)) != NULL) {
+		if (rx_submit(dev, rx_buf, GFP_ATOMIC) != 0)
+			break;
+	}
+}
+
+static void lan78xx_rx_urb_resubmit(struct lan78xx_net *dev,
+				    struct sk_buff *rx_buf)
+{
+	/* reset SKB data pointers */
+
+	rx_buf->data = rx_buf->head;
+	skb_reset_tail_pointer(rx_buf);
+	rx_buf->len = 0;
+	rx_buf->data_len = 0;
+
+	rx_submit(dev, rx_buf, GFP_ATOMIC);
+}
+
+static void lan78xx_fill_tx_cmd_words(struct sk_buff *skb, u8 *buffer)
+{
+	u32 tx_cmd_a;
+	u32 tx_cmd_b;
+
+	tx_cmd_a = (u32)(skb->len & TX_CMD_A_LEN_MASK_) | TX_CMD_A_FCS_;
+
+	if (skb->ip_summed == CHECKSUM_PARTIAL)
+		tx_cmd_a |= TX_CMD_A_IPE_ | TX_CMD_A_TPE_;
+
+	tx_cmd_b = 0;
+	if (skb_is_gso(skb)) {
+		u16 mss = max(skb_shinfo(skb)->gso_size, TX_CMD_B_MSS_MIN_);
+
+		tx_cmd_b = (mss << TX_CMD_B_MSS_SHIFT_) & TX_CMD_B_MSS_MASK_;
+
+		tx_cmd_a |= TX_CMD_A_LSO_;
+	}
+
+	if (skb_vlan_tag_present(skb)) {
+		tx_cmd_a |= TX_CMD_A_IVTG_;
+		tx_cmd_b |= skb_vlan_tag_get(skb) & TX_CMD_B_VTAG_MASK_;
+	}
+
+	put_unaligned_le32(tx_cmd_a, buffer);
+	put_unaligned_le32(tx_cmd_b, buffer + 4);
+}
+
+static struct skb_data *lan78xx_tx_buf_fill(struct lan78xx_net *dev,
+					    struct sk_buff *tx_buf)
+{
+	struct skb_data *entry = (struct skb_data *)tx_buf->cb;
+	int remain = dev->tx_urb_size;
+	u8 *tx_data = tx_buf->data;
+	u32 urb_len = 0;
+
+	entry->num_of_packet = 0;
+	entry->length = 0;
+
+	/* Work through the pending SKBs and copy the data of each SKB into
+	 * the URB buffer if there room for all the SKB data.
+	 *
+	 * There must be at least DST+SRC+TYPE in the SKB (with padding enabled)
+	 */
+	while (remain >= TX_SKB_MIN_LEN) {
+		unsigned int pending_bytes;
+		unsigned int align_bytes;
+		struct sk_buff *skb;
+		unsigned int len;
+
+		lan78xx_tx_pend_skb_get(dev, &skb, &pending_bytes);
+
+		if (!skb)
+			break;
+
+		align_bytes = (TX_ALIGNMENT - (urb_len % TX_ALIGNMENT)) %
+			      TX_ALIGNMENT;
+		len = align_bytes + TX_CMD_LEN + skb->len;
+		if (len > remain) {
+			lan78xx_tx_pend_skb_head_add(dev, skb, &pending_bytes);
+			break;
+		}
+
+		tx_data += align_bytes;
+
+		lan78xx_fill_tx_cmd_words(skb, tx_data);
+		tx_data += TX_CMD_LEN;
+
+		len = skb->len;
+		if (skb_copy_bits(skb, 0, tx_data, len) < 0) {
+			struct net_device_stats *stats = &dev->net->stats;
+
+			stats->tx_dropped++;
+			dev_kfree_skb_any(skb);
+			tx_data -= TX_CMD_LEN;
+			continue;
+		}
+
+		tx_data += len;
+		entry->length += len;
+		entry->num_of_packet += skb_shinfo(skb)->gso_segs ?: 1;
+
+		dev_kfree_skb_any(skb);
+
+		urb_len = (u32)(tx_data - (u8 *)tx_buf->data);
+
+		remain = dev->tx_urb_size - urb_len;
+	}
+
+	skb_put(tx_buf, urb_len);
+
+	return entry;
+}
+
+static void lan78xx_tx_bh(struct lan78xx_net *dev)
+{
+	int ret;
+
+	/* Start the stack Tx queue if it was stopped
+	 */
+	netif_tx_lock(dev->net);
+	if (netif_queue_stopped(dev->net)) {
+		if (lan78xx_tx_pend_data_len(dev) < lan78xx_tx_urb_space(dev))
+			netif_wake_queue(dev->net);
+	}
+	netif_tx_unlock(dev->net);
+
+	/* Go through the Tx pending queue and set up URBs to transfer
+	 * the data to the device. Stop if no more pending data or URBs,
+	 * or if an error occurs when a URB is submitted.
+	 */
+	do {
+		struct skb_data *entry;
+		struct sk_buff *tx_buf;
+		unsigned long flags;
+
+		if (skb_queue_empty(&dev->txq_pend))
+			break;
+
+		tx_buf = lan78xx_get_tx_buf(dev);
+		if (!tx_buf)
+			break;
+
+		entry = lan78xx_tx_buf_fill(dev, tx_buf);
+
+		spin_lock_irqsave(&dev->txq.lock, flags);
+		ret = usb_autopm_get_interface_async(dev->intf);
+		if (ret < 0) {
+			spin_unlock_irqrestore(&dev->txq.lock, flags);
+			goto out;
+		}
+
+		usb_fill_bulk_urb(entry->urb, dev->udev, dev->pipe_out,
+				  tx_buf->data, tx_buf->len, tx_complete,
+				  tx_buf);
+
+		if (tx_buf->len % dev->maxpacket == 0) {
+			/* send USB_ZERO_PACKET */
+			entry->urb->transfer_flags |= URB_ZERO_PACKET;
+		}
+
+#ifdef CONFIG_PM
+		/* if device is asleep stop outgoing packet processing */
+		if (test_bit(EVENT_DEV_ASLEEP, &dev->flags)) {
+			usb_anchor_urb(entry->urb, &dev->deferred);
+			netif_stop_queue(dev->net);
+			spin_unlock_irqrestore(&dev->txq.lock, flags);
+			netdev_dbg(dev->net,
+				   "Delaying transmission for resumption\n");
+			return;
+		}
+#endif
+		ret = usb_submit_urb(entry->urb, GFP_ATOMIC);
+		switch (ret) {
+		case 0:
+			netif_trans_update(dev->net);
+			lan78xx_queue_skb(&dev->txq, tx_buf, tx_start);
+			break;
+		case -EPIPE:
+			netif_stop_queue(dev->net);
+			lan78xx_defer_kevent(dev, EVENT_TX_HALT);
+			usb_autopm_put_interface_async(dev->intf);
+			break;
+		case -ENODEV:
+		case -ENOENT:
+			netif_dbg(dev, tx_err, dev->net,
+				  "tx submit urb err %d (disconnected?)", ret);
+			netif_device_detach(dev->net);
+			break;
+		default:
+			usb_autopm_put_interface_async(dev->intf);
+			netif_dbg(dev, tx_err, dev->net,
+				  "tx submit urb err %d\n", ret);
+			break;
+		}
+
+		spin_unlock_irqrestore(&dev->txq.lock, flags);
+
+		if (ret) {
+			netdev_warn(dev->net, "failed to tx urb %d\n", ret);
+out:
+			dev->net->stats.tx_dropped += entry->num_of_packet;
+			lan78xx_release_tx_buf(dev, tx_buf);
+		}
+	} while (ret == 0);
+}
+
+static int lan78xx_bh(struct lan78xx_net *dev, int budget)
+{
+	struct sk_buff_head done;
+	struct sk_buff *rx_buf;
+	struct skb_data *entry;
+	unsigned long flags;
+	int work_done = 0;
+
+	/* Pass frames received in the last NAPI cycle before
+	 * working on newly completed URBs.
+	 */
+	while (!skb_queue_empty(&dev->rxq_overflow)) {
+		lan78xx_skb_return(dev, skb_dequeue(&dev->rxq_overflow));
+		++work_done;
+	}
+
+	/* Take a snapshot of the done queue and move items to a
+	 * temporary queue. Rx URB completions will continue to add
+	 * to the done queue.
+	 */
+	__skb_queue_head_init(&done);
+
+	spin_lock_irqsave(&dev->rxq_done.lock, flags);
+	skb_queue_splice_init(&dev->rxq_done, &done);
+	spin_unlock_irqrestore(&dev->rxq_done.lock, flags);
+
+	/* Extract receive frames from completed URBs and
+	 * pass them to the stack. Re-submit each completed URB.
+	 */
+	while ((work_done < budget) &&
+	       (rx_buf = __skb_dequeue(&done))) {
+		entry = (struct skb_data *)(rx_buf->cb);
+		switch (entry->state) {
+		case rx_done:
+			rx_process(dev, rx_buf, budget, &work_done);
+			break;
+		case rx_cleanup:
+			break;
+		default:
+			netdev_dbg(dev->net, "rx buf state %d\n",
+				   entry->state);
+			break;
+		}
+
+		lan78xx_rx_urb_resubmit(dev, rx_buf);
+	}
+
+	/* If budget was consumed before processing all the URBs put them
+	 * back on the front of the done queue. They will be first to be
+	 * processed in the next NAPI cycle.
+	 */
+	spin_lock_irqsave(&dev->rxq_done.lock, flags);
+	skb_queue_splice(&done, &dev->rxq_done);
+	spin_unlock_irqrestore(&dev->rxq_done.lock, flags);
+
+	if (netif_device_present(dev->net) && netif_running(dev->net)) {
+		/* reset update timer delta */
+		if (timer_pending(&dev->stat_monitor) && (dev->delta != 1)) {
+			dev->delta = 1;
+			mod_timer(&dev->stat_monitor,
+				  jiffies + STAT_UPDATE_TIMER);
+		}
+
+		/* Submit all free Rx URBs */
+
+		if (!test_bit(EVENT_RX_HALT, &dev->flags))
+			lan78xx_rx_urb_submit_all(dev);
+
+		/* Submit new Tx URBs */
+
+		lan78xx_tx_bh(dev);
+	}
+
+	return work_done;
+}
+
+static int lan78xx_poll(struct napi_struct *napi, int budget)
+{
+	struct lan78xx_net *dev = container_of(napi, struct lan78xx_net, napi);
+	int result = budget;
+	int work_done;
+
+	/* Don't do any work if the device is suspended */
+
+	if (test_bit(EVENT_DEV_ASLEEP, &dev->flags)) {
+		napi_complete_done(napi, 0);
+		return 0;
+	}
+
+	/* Process completed URBs and submit new URBs */
+
+	work_done = lan78xx_bh(dev, budget);
+
+	if (work_done < budget) {
+		napi_complete_done(napi, work_done);
+
+		/* Start a new polling cycle if data was received or
+		 * data is waiting to be transmitted.
+		 */
+		if (!skb_queue_empty(&dev->rxq_done)) {
+			napi_schedule(napi);
+		} else if (netif_carrier_ok(dev->net)) {
+			if (skb_queue_empty(&dev->txq) &&
+			    !skb_queue_empty(&dev->txq_pend)) {
+				napi_schedule(napi);
+			} else {
+				netif_tx_lock(dev->net);
+				if (netif_queue_stopped(dev->net)) {
+					netif_wake_queue(dev->net);
+					napi_schedule(napi);
+				}
+				netif_tx_unlock(dev->net);
+			}
+		}
+		result = work_done;
+	}
+
+	return result;
+}
+
+static void lan78xx_delayedwork(struct work_struct *work)
+{
+	int status;
+	struct lan78xx_net *dev;
+
+	dev = container_of(work, struct lan78xx_net, wq.work);
+
+	if (test_bit(EVENT_DEV_DISCONNECT, &dev->flags))
+		return;
+
+	if (usb_autopm_get_interface(dev->intf) < 0)
+		return;
+
+	if (test_bit(EVENT_TX_HALT, &dev->flags)) {
+		unlink_urbs(dev, &dev->txq);
+
+		status = usb_clear_halt(dev->udev, dev->pipe_out);
+		if (status < 0 &&
+		    status != -EPIPE &&
+		    status != -ESHUTDOWN) {
+			if (netif_msg_tx_err(dev))
+				netdev_err(dev->net,
+					   "can't clear tx halt, status %d\n",
+					   status);
+		} else {
+			clear_bit(EVENT_TX_HALT, &dev->flags);
+			if (status != -ESHUTDOWN)
+				netif_wake_queue(dev->net);
+		}
+	}
+
+	if (test_bit(EVENT_RX_HALT, &dev->flags)) {
+		unlink_urbs(dev, &dev->rxq);
+		status = usb_clear_halt(dev->udev, dev->pipe_in);
+		if (status < 0 &&
+		    status != -EPIPE &&
+		    status != -ESHUTDOWN) {
+			if (netif_msg_rx_err(dev))
+				netdev_err(dev->net,
+					   "can't clear rx halt, status %d\n",
+					   status);
+		} else {
+			clear_bit(EVENT_RX_HALT, &dev->flags);
+			napi_schedule(&dev->napi);
+		}
+	}
+
+	if (test_bit(EVENT_LINK_RESET, &dev->flags)) {
+		int ret = 0;
+
+		clear_bit(EVENT_LINK_RESET, &dev->flags);
+		if (lan78xx_link_reset(dev) < 0) {
+			netdev_info(dev->net, "link reset failed (%d)\n",
+				    ret);
+		}
+	}
+
+	if (test_bit(EVENT_STAT_UPDATE, &dev->flags)) {
+		lan78xx_update_stats(dev);
+
+		clear_bit(EVENT_STAT_UPDATE, &dev->flags);
+
+		mod_timer(&dev->stat_monitor,
+			  jiffies + (STAT_UPDATE_TIMER * dev->delta));
+
+		dev->delta = min((dev->delta * 2), 50);
+	}
+
+	usb_autopm_put_interface(dev->intf);
+}
+
+static void intr_complete(struct urb *urb)
+{
+	struct lan78xx_net *dev = urb->context;
+	int status = urb->status;
+
+	switch (status) {
+	/* success */
+	case 0:
+		lan78xx_status(dev, urb);
+		break;
+
+	/* software-driven interface shutdown */
+	case -ENOENT:			/* urb killed */
+	case -ENODEV:			/* hardware gone */
+	case -ESHUTDOWN:		/* hardware gone */
+		netif_dbg(dev, ifdown, dev->net,
+			  "intr shutdown, code %d\n", status);
+		return;
+
+	/* NOTE:  not throttling like RX/TX, since this endpoint
+	 * already polls infrequently
+	 */
+	default:
+		netdev_dbg(dev->net, "intr status %d\n", status);
+		break;
+	}
+
+	if (!netif_device_present(dev->net) ||
+	    !netif_running(dev->net)) {
+		netdev_warn(dev->net, "not submitting new status URB");
+		return;
+	}
+
+	memset(urb->transfer_buffer, 0, urb->transfer_buffer_length);
+	status = usb_submit_urb(urb, GFP_ATOMIC);
+
+	switch (status) {
+	case  0:
+		break;
+	case -ENODEV:
+	case -ENOENT:
+		netif_dbg(dev, timer, dev->net,
+			  "intr resubmit %d (disconnect?)", status);
+		netif_device_detach(dev->net);
+		break;
+	default:
+		netif_err(dev, timer, dev->net,
+			  "intr resubmit --> %d\n", status);
+		break;
+	}
+}
+
+static void lan78xx_disconnect(struct usb_interface *intf)
+{
+	struct lan78xx_net *dev;
+	struct usb_device *udev;
+	struct net_device *net;
+	struct phy_device *phydev;
+
+	dev = usb_get_intfdata(intf);
+	usb_set_intfdata(intf, NULL);
+	if (!dev)
+		return;
+
+	set_bit(EVENT_DEV_DISCONNECT, &dev->flags);
+
+	netif_napi_del(&dev->napi);
+
+	udev = interface_to_usbdev(intf);
+	net = dev->net;
+
+	unregister_netdev(net);
+
+	cancel_delayed_work_sync(&dev->wq);
+
+	phydev = net->phydev;
+
+	phy_unregister_fixup_for_uid(PHY_KSZ9031RNX, 0xfffffff0);
+	phy_unregister_fixup_for_uid(PHY_LAN8835, 0xfffffff0);
+
+	phy_disconnect(net->phydev);
+
+	if (phy_is_pseudo_fixed_link(phydev))
+		fixed_phy_unregister(phydev);
+
+	usb_scuttle_anchored_urbs(&dev->deferred);
+
+	if (timer_pending(&dev->stat_monitor))
+		del_timer_sync(&dev->stat_monitor);
+
+	lan78xx_unbind(dev, intf);
+
+	lan78xx_free_tx_resources(dev);
+	lan78xx_free_rx_resources(dev);
+
+	usb_kill_urb(dev->urb_intr);
+	usb_free_urb(dev->urb_intr);
+
+	free_netdev(net);
+	usb_put_dev(udev);
+}
+
+static void lan78xx_tx_timeout(struct net_device *net, unsigned int txqueue)
+{
+	struct lan78xx_net *dev = netdev_priv(net);
+
+	unlink_urbs(dev, &dev->txq);
+	napi_schedule(&dev->napi);
+}
+
+static netdev_features_t lan78xx_features_check(struct sk_buff *skb,
+						struct net_device *netdev,
+						netdev_features_t features)
+{
+	struct lan78xx_net *dev = netdev_priv(netdev);
+
+	if (skb->len > LAN78XX_TSO_SIZE(dev))
+		features &= ~NETIF_F_GSO_MASK;
+
+	features = vlan_features_check(skb, features);
+	features = vxlan_features_check(skb, features);
+
+	return features;
+}
+
+static const struct net_device_ops lan78xx_netdev_ops = {
+	.ndo_open		= lan78xx_open,
+	.ndo_stop		= lan78xx_stop,
+	.ndo_start_xmit		= lan78xx_start_xmit,
+	.ndo_tx_timeout		= lan78xx_tx_timeout,
+	.ndo_change_mtu		= lan78xx_change_mtu,
+	.ndo_set_mac_address	= lan78xx_set_mac_addr,
+	.ndo_validate_addr	= eth_validate_addr,
+	.ndo_eth_ioctl		= phy_do_ioctl_running,
+	.ndo_set_rx_mode	= lan78xx_set_multicast,
+	.ndo_set_features	= lan78xx_set_features,
+	.ndo_vlan_rx_add_vid	= lan78xx_vlan_rx_add_vid,
+	.ndo_vlan_rx_kill_vid	= lan78xx_vlan_rx_kill_vid,
+	.ndo_features_check	= lan78xx_features_check,
+};
+
+static void lan78xx_stat_monitor(struct timer_list *t)
+{
+	struct lan78xx_net *dev = from_timer(dev, t, stat_monitor);
+
+	lan78xx_defer_kevent(dev, EVENT_STAT_UPDATE);
+}
+
+static int lan78xx_probe(struct usb_interface *intf,
+			 const struct usb_device_id *id)
+{
+	struct usb_host_endpoint *ep_blkin, *ep_blkout, *ep_intr;
+	struct lan78xx_net *dev;
+	struct net_device *netdev;
+	struct usb_device *udev;
+	int ret;
+	unsigned int maxp;
+	unsigned int period;
+	u8 *buf = NULL;
+
+	udev = interface_to_usbdev(intf);
+	udev = usb_get_dev(udev);
+
+	netdev = alloc_etherdev(sizeof(struct lan78xx_net));
+	if (!netdev) {
+		dev_err(&intf->dev, "Error: OOM\n");
+		ret = -ENOMEM;
+		goto out1;
+	}
+
+	/* netdev_printk() needs this */
+	SET_NETDEV_DEV(netdev, &intf->dev);
+
+	dev = netdev_priv(netdev);
+	dev->udev = udev;
+	dev->intf = intf;
+	dev->net = netdev;
+	dev->msg_enable = netif_msg_init(msg_level, NETIF_MSG_DRV
+					| NETIF_MSG_PROBE | NETIF_MSG_LINK);
+
+	skb_queue_head_init(&dev->rxq);
+	skb_queue_head_init(&dev->txq);
+	skb_queue_head_init(&dev->rxq_done);
+	skb_queue_head_init(&dev->txq_pend);
+	skb_queue_head_init(&dev->rxq_overflow);
+	mutex_init(&dev->phy_mutex);
+	mutex_init(&dev->dev_mutex);
+
+	ret = lan78xx_urb_config_init(dev);
+	if (ret < 0)
+		goto out2;
+
+	ret = lan78xx_alloc_tx_resources(dev);
+	if (ret < 0)
+		goto out2;
+
+	ret = lan78xx_alloc_rx_resources(dev);
+	if (ret < 0)
+		goto out3;
+
+	/* MTU range: 68 - 9000 */
+	netdev->max_mtu = MAX_SINGLE_PACKET_SIZE;
+
+	netif_set_tso_max_size(netdev, LAN78XX_TSO_SIZE(dev));
+
+	netif_napi_add(netdev, &dev->napi, lan78xx_poll);
+
+	INIT_DELAYED_WORK(&dev->wq, lan78xx_delayedwork);
+	init_usb_anchor(&dev->deferred);
+
+	netdev->netdev_ops = &lan78xx_netdev_ops;
+	netdev->watchdog_timeo = TX_TIMEOUT_JIFFIES;
+	netdev->ethtool_ops = &lan78xx_ethtool_ops;
+
+	dev->delta = 1;
+	timer_setup(&dev->stat_monitor, lan78xx_stat_monitor, 0);
+
+	mutex_init(&dev->stats.access_lock);
+
+	if (intf->cur_altsetting->desc.bNumEndpoints < 3) {
+		ret = -ENODEV;
+		goto out4;
+	}
+
+	dev->pipe_in = usb_rcvbulkpipe(udev, BULK_IN_PIPE);
+	ep_blkin = usb_pipe_endpoint(udev, dev->pipe_in);
+	if (!ep_blkin || !usb_endpoint_is_bulk_in(&ep_blkin->desc)) {
+		ret = -ENODEV;
+		goto out4;
+	}
+
+	dev->pipe_out = usb_sndbulkpipe(udev, BULK_OUT_PIPE);
+	ep_blkout = usb_pipe_endpoint(udev, dev->pipe_out);
+	if (!ep_blkout || !usb_endpoint_is_bulk_out(&ep_blkout->desc)) {
+		ret = -ENODEV;
+		goto out4;
+	}
+
+	ep_intr = &intf->cur_altsetting->endpoint[2];
+	if (!usb_endpoint_is_int_in(&ep_intr->desc)) {
+		ret = -ENODEV;
+		goto out4;
+	}
+
+	dev->pipe_intr = usb_rcvintpipe(dev->udev,
+					usb_endpoint_num(&ep_intr->desc));
+
+	ret = lan78xx_bind(dev, intf);
+	if (ret < 0)
+		goto out4;
+
+	period = ep_intr->desc.bInterval;
+	maxp = usb_maxpacket(dev->udev, dev->pipe_intr);
+	buf = kmalloc(maxp, GFP_KERNEL);
+	if (!buf) {
+		ret = -ENOMEM;
+		goto out5;
+	}
+
+	dev->urb_intr = usb_alloc_urb(0, GFP_KERNEL);
+	if (!dev->urb_intr) {
+		ret = -ENOMEM;
+		goto out6;
+	} else {
+		usb_fill_int_urb(dev->urb_intr, dev->udev,
+				 dev->pipe_intr, buf, maxp,
+				 intr_complete, dev, period);
+		dev->urb_intr->transfer_flags |= URB_FREE_BUFFER;
+	}
+
+	dev->maxpacket = usb_maxpacket(dev->udev, dev->pipe_out);
+
+	/* Reject broken descriptors. */
+	if (dev->maxpacket == 0) {
+		ret = -ENODEV;
+		goto out6;
+	}
+
+	/* driver requires remote-wakeup capability during autosuspend. */
+	intf->needs_remote_wakeup = 1;
+
+	ret = lan78xx_phy_init(dev);
+	if (ret < 0)
+		goto out7;
+
+	ret = register_netdev(netdev);
+	if (ret != 0) {
+		netif_err(dev, probe, netdev, "couldn't register the device\n");
+		goto out8;
+	}
+
+	usb_set_intfdata(intf, dev);
+
+	ret = device_set_wakeup_enable(&udev->dev, true);
+
+	 /* Default delay of 2sec has more overhead than advantage.
+	  * Set to 10sec as default.
+	  */
+	pm_runtime_set_autosuspend_delay(&udev->dev,
+					 DEFAULT_AUTOSUSPEND_DELAY);
+
+	return 0;
+
+out8:
+	phy_disconnect(netdev->phydev);
+out7:
+	usb_free_urb(dev->urb_intr);
+out6:
+	kfree(buf);
+out5:
+	lan78xx_unbind(dev, intf);
+out4:
+	netif_napi_del(&dev->napi);
+	lan78xx_free_rx_resources(dev);
+out3:
+	lan78xx_free_tx_resources(dev);
+out2:
+	free_netdev(netdev);
+out1:
+	usb_put_dev(udev);
+
+	return ret;
+}
+
+static u16 lan78xx_wakeframe_crc16(const u8 *buf, int len)
+{
+	const u16 crc16poly = 0x8005;
+	int i;
+	u16 bit, crc, msb;
+	u8 data;
+
+	crc = 0xFFFF;
+	for (i = 0; i < len; i++) {
+		data = *buf++;
+		for (bit = 0; bit < 8; bit++) {
+			msb = crc >> 15;
+			crc <<= 1;
+
+			if (msb ^ (u16)(data & 1)) {
+				crc ^= crc16poly;
+				crc |= (u16)0x0001U;
+			}
+			data >>= 1;
+		}
+	}
+
+	return crc;
+}
+
+static int lan78xx_set_auto_suspend(struct lan78xx_net *dev)
+{
+	u32 buf;
+	int ret;
+
+	ret = lan78xx_stop_tx_path(dev);
+	if (ret < 0)
+		return ret;
+
+	ret = lan78xx_stop_rx_path(dev);
+	if (ret < 0)
+		return ret;
+
+	/* auto suspend (selective suspend) */
+
+	ret = lan78xx_write_reg(dev, WUCSR, 0);
+	if (ret < 0)
+		return ret;
+	ret = lan78xx_write_reg(dev, WUCSR2, 0);
+	if (ret < 0)
+		return ret;
+	ret = lan78xx_write_reg(dev, WK_SRC, 0xFFF1FF1FUL);
+	if (ret < 0)
+		return ret;
+
+	/* set goodframe wakeup */
+
+	ret = lan78xx_read_reg(dev, WUCSR, &buf);
+	if (ret < 0)
+		return ret;
+
+	buf |= WUCSR_RFE_WAKE_EN_;
+	buf |= WUCSR_STORE_WAKE_;
+
+	ret = lan78xx_write_reg(dev, WUCSR, buf);
+	if (ret < 0)
+		return ret;
+
+	ret = lan78xx_read_reg(dev, PMT_CTL, &buf);
+	if (ret < 0)
+		return ret;
+
+	buf &= ~PMT_CTL_RES_CLR_WKP_EN_;
+	buf |= PMT_CTL_RES_CLR_WKP_STS_;
+	buf |= PMT_CTL_PHY_WAKE_EN_;
+	buf |= PMT_CTL_WOL_EN_;
+	buf &= ~PMT_CTL_SUS_MODE_MASK_;
+	buf |= PMT_CTL_SUS_MODE_3_;
+
+	ret = lan78xx_write_reg(dev, PMT_CTL, buf);
+	if (ret < 0)
+		return ret;
+
+	ret = lan78xx_read_reg(dev, PMT_CTL, &buf);
+	if (ret < 0)
+		return ret;
+
+	buf |= PMT_CTL_WUPS_MASK_;
+
+	ret = lan78xx_write_reg(dev, PMT_CTL, buf);
+	if (ret < 0)
+		return ret;
+
+	ret = lan78xx_start_rx_path(dev);
+
+	return ret;
+}
+
+static int lan78xx_set_suspend(struct lan78xx_net *dev, u32 wol)
+{
+	const u8 ipv4_multicast[3] = { 0x01, 0x00, 0x5E };
+	const u8 ipv6_multicast[3] = { 0x33, 0x33 };
+	const u8 arp_type[2] = { 0x08, 0x06 };
+	u32 temp_pmt_ctl;
+	int mask_index;
+	u32 temp_wucsr;
+	u32 buf;
+	u16 crc;
+	int ret;
+
+	ret = lan78xx_stop_tx_path(dev);
+	if (ret < 0)
+		return ret;
+	ret = lan78xx_stop_rx_path(dev);
+	if (ret < 0)
+		return ret;
+
+	ret = lan78xx_write_reg(dev, WUCSR, 0);
+	if (ret < 0)
+		return ret;
+	ret = lan78xx_write_reg(dev, WUCSR2, 0);
+	if (ret < 0)
+		return ret;
+	ret = lan78xx_write_reg(dev, WK_SRC, 0xFFF1FF1FUL);
+	if (ret < 0)
+		return ret;
+
+	temp_wucsr = 0;
+
+	temp_pmt_ctl = 0;
+
+	ret = lan78xx_read_reg(dev, PMT_CTL, &temp_pmt_ctl);
+	if (ret < 0)
+		return ret;
+
+	temp_pmt_ctl &= ~PMT_CTL_RES_CLR_WKP_EN_;
+	temp_pmt_ctl |= PMT_CTL_RES_CLR_WKP_STS_;
+
+	for (mask_index = 0; mask_index < NUM_OF_WUF_CFG; mask_index++) {
+		ret = lan78xx_write_reg(dev, WUF_CFG(mask_index), 0);
+		if (ret < 0)
+			return ret;
+	}
+
+	mask_index = 0;
+	if (wol & WAKE_PHY) {
+		temp_pmt_ctl |= PMT_CTL_PHY_WAKE_EN_;
+
+		temp_pmt_ctl |= PMT_CTL_WOL_EN_;
+		temp_pmt_ctl &= ~PMT_CTL_SUS_MODE_MASK_;
+		temp_pmt_ctl |= PMT_CTL_SUS_MODE_0_;
+	}
+	if (wol & WAKE_MAGIC) {
+		temp_wucsr |= WUCSR_MPEN_;
+
+		temp_pmt_ctl |= PMT_CTL_WOL_EN_;
+		temp_pmt_ctl &= ~PMT_CTL_SUS_MODE_MASK_;
+		temp_pmt_ctl |= PMT_CTL_SUS_MODE_3_;
+	}
+	if (wol & WAKE_BCAST) {
+		temp_wucsr |= WUCSR_BCST_EN_;
+
+		temp_pmt_ctl |= PMT_CTL_WOL_EN_;
+		temp_pmt_ctl &= ~PMT_CTL_SUS_MODE_MASK_;
+		temp_pmt_ctl |= PMT_CTL_SUS_MODE_0_;
+	}
+	if (wol & WAKE_MCAST) {
+		temp_wucsr |= WUCSR_WAKE_EN_;
+
+		/* set WUF_CFG & WUF_MASK for IPv4 Multicast */
+		crc = lan78xx_wakeframe_crc16(ipv4_multicast, 3);
+		ret = lan78xx_write_reg(dev, WUF_CFG(mask_index),
+					WUF_CFGX_EN_ |
+					WUF_CFGX_TYPE_MCAST_ |
+					(0 << WUF_CFGX_OFFSET_SHIFT_) |
+					(crc & WUF_CFGX_CRC16_MASK_));
+		if (ret < 0)
+			return ret;
+
+		ret = lan78xx_write_reg(dev, WUF_MASK0(mask_index), 7);
+		if (ret < 0)
+			return ret;
+		ret = lan78xx_write_reg(dev, WUF_MASK1(mask_index), 0);
+		if (ret < 0)
+			return ret;
+		ret = lan78xx_write_reg(dev, WUF_MASK2(mask_index), 0);
+		if (ret < 0)
+			return ret;
+		ret = lan78xx_write_reg(dev, WUF_MASK3(mask_index), 0);
+		if (ret < 0)
+			return ret;
+
+		mask_index++;
+
+		/* for IPv6 Multicast */
+		crc = lan78xx_wakeframe_crc16(ipv6_multicast, 2);
+		ret = lan78xx_write_reg(dev, WUF_CFG(mask_index),
+					WUF_CFGX_EN_ |
+					WUF_CFGX_TYPE_MCAST_ |
+					(0 << WUF_CFGX_OFFSET_SHIFT_) |
+					(crc & WUF_CFGX_CRC16_MASK_));
+		if (ret < 0)
+			return ret;
+
+		ret = lan78xx_write_reg(dev, WUF_MASK0(mask_index), 3);
+		if (ret < 0)
+			return ret;
+		ret = lan78xx_write_reg(dev, WUF_MASK1(mask_index), 0);
+		if (ret < 0)
+			return ret;
+		ret = lan78xx_write_reg(dev, WUF_MASK2(mask_index), 0);
+		if (ret < 0)
+			return ret;
+		ret = lan78xx_write_reg(dev, WUF_MASK3(mask_index), 0);
+		if (ret < 0)
+			return ret;
+
+		mask_index++;
+
+		temp_pmt_ctl |= PMT_CTL_WOL_EN_;
+		temp_pmt_ctl &= ~PMT_CTL_SUS_MODE_MASK_;
+		temp_pmt_ctl |= PMT_CTL_SUS_MODE_0_;
+	}
+	if (wol & WAKE_UCAST) {
+		temp_wucsr |= WUCSR_PFDA_EN_;
+
+		temp_pmt_ctl |= PMT_CTL_WOL_EN_;
+		temp_pmt_ctl &= ~PMT_CTL_SUS_MODE_MASK_;
+		temp_pmt_ctl |= PMT_CTL_SUS_MODE_0_;
+	}
+	if (wol & WAKE_ARP) {
+		temp_wucsr |= WUCSR_WAKE_EN_;
+
+		/* set WUF_CFG & WUF_MASK
+		 * for packettype (offset 12,13) = ARP (0x0806)
+		 */
+		crc = lan78xx_wakeframe_crc16(arp_type, 2);
+		ret = lan78xx_write_reg(dev, WUF_CFG(mask_index),
+					WUF_CFGX_EN_ |
+					WUF_CFGX_TYPE_ALL_ |
+					(0 << WUF_CFGX_OFFSET_SHIFT_) |
+					(crc & WUF_CFGX_CRC16_MASK_));
+		if (ret < 0)
+			return ret;
+
+		ret = lan78xx_write_reg(dev, WUF_MASK0(mask_index), 0x3000);
+		if (ret < 0)
+			return ret;
+		ret = lan78xx_write_reg(dev, WUF_MASK1(mask_index), 0);
+		if (ret < 0)
+			return ret;
+		ret = lan78xx_write_reg(dev, WUF_MASK2(mask_index), 0);
+		if (ret < 0)
+			return ret;
+		ret = lan78xx_write_reg(dev, WUF_MASK3(mask_index), 0);
+		if (ret < 0)
+			return ret;
+
+		mask_index++;
+
+		temp_pmt_ctl |= PMT_CTL_WOL_EN_;
+		temp_pmt_ctl &= ~PMT_CTL_SUS_MODE_MASK_;
+		temp_pmt_ctl |= PMT_CTL_SUS_MODE_0_;
+	}
+
+	ret = lan78xx_write_reg(dev, WUCSR, temp_wucsr);
+	if (ret < 0)
+		return ret;
+
+	/* when multiple WOL bits are set */
+	if (hweight_long((unsigned long)wol) > 1) {
+		temp_pmt_ctl |= PMT_CTL_WOL_EN_;
+		temp_pmt_ctl &= ~PMT_CTL_SUS_MODE_MASK_;
+		temp_pmt_ctl |= PMT_CTL_SUS_MODE_0_;
+	}
+	ret = lan78xx_write_reg(dev, PMT_CTL, temp_pmt_ctl);
+	if (ret < 0)
+		return ret;
+
+	/* clear WUPS */
+	ret = lan78xx_read_reg(dev, PMT_CTL, &buf);
+	if (ret < 0)
+		return ret;
+
+	buf |= PMT_CTL_WUPS_MASK_;
+
+	ret = lan78xx_write_reg(dev, PMT_CTL, buf);
+	if (ret < 0)
+		return ret;
+
+	ret = lan78xx_start_rx_path(dev);
+
+	return ret;
+}
+
+static int lan78xx_suspend(struct usb_interface *intf, pm_message_t message)
+{
+	struct lan78xx_net *dev = usb_get_intfdata(intf);
+	bool dev_open;
+	int ret;
+
+	mutex_lock(&dev->dev_mutex);
+
+	netif_dbg(dev, ifdown, dev->net,
+		  "suspending: pm event %#x", message.event);
+
+	dev_open = test_bit(EVENT_DEV_OPEN, &dev->flags);
+
+	if (dev_open) {
+		spin_lock_irq(&dev->txq.lock);
+		/* don't autosuspend while transmitting */
+		if ((skb_queue_len(&dev->txq) ||
+		     skb_queue_len(&dev->txq_pend)) &&
+		    PMSG_IS_AUTO(message)) {
+			spin_unlock_irq(&dev->txq.lock);
+			ret = -EBUSY;
+			goto out;
+		} else {
+			set_bit(EVENT_DEV_ASLEEP, &dev->flags);
+			spin_unlock_irq(&dev->txq.lock);
+		}
+
+		/* stop RX */
+		ret = lan78xx_stop_rx_path(dev);
+		if (ret < 0)
+			goto out;
+
+		ret = lan78xx_flush_rx_fifo(dev);
+		if (ret < 0)
+			goto out;
+
+		/* stop Tx */
+		ret = lan78xx_stop_tx_path(dev);
+		if (ret < 0)
+			goto out;
+
+		/* empty out the Rx and Tx queues */
+		netif_device_detach(dev->net);
+		lan78xx_terminate_urbs(dev);
+		usb_kill_urb(dev->urb_intr);
+
+		/* reattach */
+		netif_device_attach(dev->net);
+
+		del_timer(&dev->stat_monitor);
+
+		if (PMSG_IS_AUTO(message)) {
+			ret = lan78xx_set_auto_suspend(dev);
+			if (ret < 0)
+				goto out;
+		} else {
+			struct lan78xx_priv *pdata;
+
+			pdata = (struct lan78xx_priv *)(dev->data[0]);
+			netif_carrier_off(dev->net);
+			ret = lan78xx_set_suspend(dev, pdata->wol);
+			if (ret < 0)
+				goto out;
+		}
+	} else {
+		/* Interface is down; don't allow WOL and PHY
+		 * events to wake up the host
+		 */
+		u32 buf;
+
+		set_bit(EVENT_DEV_ASLEEP, &dev->flags);
+
+		ret = lan78xx_write_reg(dev, WUCSR, 0);
+		if (ret < 0)
+			goto out;
+		ret = lan78xx_write_reg(dev, WUCSR2, 0);
+		if (ret < 0)
+			goto out;
+
+		ret = lan78xx_read_reg(dev, PMT_CTL, &buf);
+		if (ret < 0)
+			goto out;
+
+		buf &= ~PMT_CTL_RES_CLR_WKP_EN_;
+		buf |= PMT_CTL_RES_CLR_WKP_STS_;
+		buf &= ~PMT_CTL_SUS_MODE_MASK_;
+		buf |= PMT_CTL_SUS_MODE_3_;
+
+		ret = lan78xx_write_reg(dev, PMT_CTL, buf);
+		if (ret < 0)
+			goto out;
+
+		ret = lan78xx_read_reg(dev, PMT_CTL, &buf);
+		if (ret < 0)
+			goto out;
+
+		buf |= PMT_CTL_WUPS_MASK_;
+
+		ret = lan78xx_write_reg(dev, PMT_CTL, buf);
+		if (ret < 0)
+			goto out;
+	}
+
+	ret = 0;
+out:
+	mutex_unlock(&dev->dev_mutex);
+
+	return ret;
+}
+
+static bool lan78xx_submit_deferred_urbs(struct lan78xx_net *dev)
+{
+	bool pipe_halted = false;
+	struct urb *urb;
+
+	while ((urb = usb_get_from_anchor(&dev->deferred))) {
+		struct sk_buff *skb = urb->context;
+		int ret;
+
+		if (!netif_device_present(dev->net) ||
+		    !netif_carrier_ok(dev->net) ||
+		    pipe_halted) {
+			lan78xx_release_tx_buf(dev, skb);
+			continue;
+		}
+
+		ret = usb_submit_urb(urb, GFP_ATOMIC);
+
+		if (ret == 0) {
+			netif_trans_update(dev->net);
+			lan78xx_queue_skb(&dev->txq, skb, tx_start);
+		} else {
+			if (ret == -EPIPE) {
+				netif_stop_queue(dev->net);
+				pipe_halted = true;
+			} else if (ret == -ENODEV) {
+				netif_device_detach(dev->net);
+			}
+
+			lan78xx_release_tx_buf(dev, skb);
+		}
+	}
+
+	return pipe_halted;
+}
+
+static int lan78xx_resume(struct usb_interface *intf)
+{
+	struct lan78xx_net *dev = usb_get_intfdata(intf);
+	bool dev_open;
+	int ret;
+
+	mutex_lock(&dev->dev_mutex);
+
+	netif_dbg(dev, ifup, dev->net, "resuming device");
+
+	dev_open = test_bit(EVENT_DEV_OPEN, &dev->flags);
+
+	if (dev_open) {
+		bool pipe_halted = false;
+
+		ret = lan78xx_flush_tx_fifo(dev);
+		if (ret < 0)
+			goto out;
+
+		if (dev->urb_intr) {
+			int ret = usb_submit_urb(dev->urb_intr, GFP_KERNEL);
+
+			if (ret < 0) {
+				if (ret == -ENODEV)
+					netif_device_detach(dev->net);
+				netdev_warn(dev->net, "Failed to submit intr URB");
+			}
+		}
+
+		spin_lock_irq(&dev->txq.lock);
+
+		if (netif_device_present(dev->net)) {
+			pipe_halted = lan78xx_submit_deferred_urbs(dev);
+
+			if (pipe_halted)
+				lan78xx_defer_kevent(dev, EVENT_TX_HALT);
+		}
+
+		clear_bit(EVENT_DEV_ASLEEP, &dev->flags);
+
+		spin_unlock_irq(&dev->txq.lock);
+
+		if (!pipe_halted &&
+		    netif_device_present(dev->net) &&
+		    (lan78xx_tx_pend_data_len(dev) < lan78xx_tx_urb_space(dev)))
+			netif_start_queue(dev->net);
+
+		ret = lan78xx_start_tx_path(dev);
+		if (ret < 0)
+			goto out;
+
+		napi_schedule(&dev->napi);
+
+		if (!timer_pending(&dev->stat_monitor)) {
+			dev->delta = 1;
+			mod_timer(&dev->stat_monitor,
+				  jiffies + STAT_UPDATE_TIMER);
+		}
+
+	} else {
+		clear_bit(EVENT_DEV_ASLEEP, &dev->flags);
+	}
+
+	ret = lan78xx_write_reg(dev, WUCSR2, 0);
+	if (ret < 0)
+		goto out;
+	ret = lan78xx_write_reg(dev, WUCSR, 0);
+	if (ret < 0)
+		goto out;
+	ret = lan78xx_write_reg(dev, WK_SRC, 0xFFF1FF1FUL);
+	if (ret < 0)
+		goto out;
+
+	ret = lan78xx_write_reg(dev, WUCSR2, WUCSR2_NS_RCD_ |
+					     WUCSR2_ARP_RCD_ |
+					     WUCSR2_IPV6_TCPSYN_RCD_ |
+					     WUCSR2_IPV4_TCPSYN_RCD_);
+	if (ret < 0)
+		goto out;
+
+	ret = lan78xx_write_reg(dev, WUCSR, WUCSR_EEE_TX_WAKE_ |
+					    WUCSR_EEE_RX_WAKE_ |
+					    WUCSR_PFDA_FR_ |
+					    WUCSR_RFE_WAKE_FR_ |
+					    WUCSR_WUFR_ |
+					    WUCSR_MPR_ |
+					    WUCSR_BCST_FR_);
+	if (ret < 0)
+		goto out;
+
+	ret = 0;
+out:
+	mutex_unlock(&dev->dev_mutex);
+
+	return ret;
+}
+
+static int lan78xx_reset_resume(struct usb_interface *intf)
+{
+	struct lan78xx_net *dev = usb_get_intfdata(intf);
+	int ret;
+
+	netif_dbg(dev, ifup, dev->net, "(reset) resuming device");
+
+	ret = lan78xx_reset(dev);
+	if (ret < 0)
+		return ret;
+
+	phy_start(dev->net->phydev);
+
+	ret = lan78xx_resume(intf);
+
+	return ret;
+}
+
+static const struct usb_device_id products[] = {
+	{
+	/* LAN7800 USB Gigabit Ethernet Device */
+	USB_DEVICE(LAN78XX_USB_VENDOR_ID, LAN7800_USB_PRODUCT_ID),
+	},
+	{
+	/* LAN7850 USB Gigabit Ethernet Device */
+	USB_DEVICE(LAN78XX_USB_VENDOR_ID, LAN7850_USB_PRODUCT_ID),
+	},
+	{
+	/* LAN7801 USB Gigabit Ethernet Device */
+	USB_DEVICE(LAN78XX_USB_VENDOR_ID, LAN7801_USB_PRODUCT_ID),
+	},
+	{
+	/* ATM2-AF USB Gigabit Ethernet Device */
+	USB_DEVICE(AT29M2AF_USB_VENDOR_ID, AT29M2AF_USB_PRODUCT_ID),
+	},
+	{},
+};
+MODULE_DEVICE_TABLE(usb, products);
+
+static struct usb_driver lan78xx_driver = {
+	.name			= DRIVER_NAME,
+	.id_table		= products,
+	.probe			= lan78xx_probe,
+	.disconnect		= lan78xx_disconnect,
+	.suspend		= lan78xx_suspend,
+	.resume			= lan78xx_resume,
+	.reset_resume		= lan78xx_reset_resume,
+	.supports_autosuspend	= 1,
+	.disable_hub_initiated_lpm = 1,
+};
+
+module_usb_driver(lan78xx_driver);
+
+MODULE_AUTHOR(DRIVER_AUTHOR);
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_LICENSE("GPL");