Adding upstream version 6.1.76.upstream/6.1.76upstream

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

1 files changed, 957 insertions, 0 deletions

diff --git a/drivers/net/usb/rtl8150.c b/drivers/net/usb/rtl8150.c
new file mode 100644
index 000000000..97afd7335
--- /dev/null
+++ b/drivers/net/usb/rtl8150.c
@@ -0,0 +1,957 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ *  Copyright (c) 2002 Petko Manolov (petkan@users.sourceforge.net)
+ */
+
+#include <linux/signal.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/mii.h>
+#include <linux/ethtool.h>
+#include <linux/usb.h>
+#include <linux/uaccess.h>
+
+/* Version Information */
+#define DRIVER_VERSION "v0.6.2 (2004/08/27)"
+#define DRIVER_AUTHOR "Petko Manolov <petkan@users.sourceforge.net>"
+#define DRIVER_DESC "rtl8150 based usb-ethernet driver"
+
+#define	IDR			0x0120
+#define	MAR			0x0126
+#define	CR			0x012e
+#define	TCR			0x012f
+#define	RCR			0x0130
+#define	TSR			0x0132
+#define	RSR			0x0133
+#define	CON0			0x0135
+#define	CON1			0x0136
+#define	MSR			0x0137
+#define	PHYADD			0x0138
+#define	PHYDAT			0x0139
+#define	PHYCNT			0x013b
+#define	GPPC			0x013d
+#define	BMCR			0x0140
+#define	BMSR			0x0142
+#define	ANAR			0x0144
+#define	ANLP			0x0146
+#define	AER			0x0148
+#define CSCR			0x014C  /* This one has the link status */
+#define CSCR_LINK_STATUS	(1 << 3)
+
+#define	IDR_EEPROM		0x1202
+
+#define	PHY_READ		0
+#define	PHY_WRITE		0x20
+#define	PHY_GO			0x40
+
+#define	MII_TIMEOUT		10
+#define	INTBUFSIZE		8
+
+#define	RTL8150_REQT_READ	0xc0
+#define	RTL8150_REQT_WRITE	0x40
+#define	RTL8150_REQ_GET_REGS	0x05
+#define	RTL8150_REQ_SET_REGS	0x05
+
+
+/* Transmit status register errors */
+#define TSR_ECOL		(1<<5)
+#define TSR_LCOL		(1<<4)
+#define TSR_LOSS_CRS		(1<<3)
+#define TSR_JBR			(1<<2)
+#define TSR_ERRORS		(TSR_ECOL | TSR_LCOL | TSR_LOSS_CRS | TSR_JBR)
+/* Receive status register errors */
+#define RSR_CRC			(1<<2)
+#define RSR_FAE			(1<<1)
+#define RSR_ERRORS		(RSR_CRC | RSR_FAE)
+
+/* Media status register definitions */
+#define MSR_DUPLEX		(1<<4)
+#define MSR_SPEED		(1<<3)
+#define MSR_LINK		(1<<2)
+
+/* Interrupt pipe data */
+#define INT_TSR			0x00
+#define INT_RSR			0x01
+#define INT_MSR			0x02
+#define INT_WAKSR		0x03
+#define INT_TXOK_CNT		0x04
+#define INT_RXLOST_CNT		0x05
+#define INT_CRERR_CNT		0x06
+#define INT_COL_CNT		0x07
+
+
+#define	RTL8150_MTU		1540
+#define	RTL8150_TX_TIMEOUT	(HZ)
+#define	RX_SKB_POOL_SIZE	4
+
+/* rtl8150 flags */
+#define	RTL8150_HW_CRC		0
+#define	RX_REG_SET		1
+#define	RTL8150_UNPLUG		2
+#define	RX_URB_FAIL		3
+
+/* Define these values to match your device */
+#define	VENDOR_ID_REALTEK		0x0bda
+#define	VENDOR_ID_MELCO			0x0411
+#define	VENDOR_ID_MICRONET		0x3980
+#define	VENDOR_ID_LONGSHINE		0x07b8
+#define	VENDOR_ID_OQO			0x1557
+#define	VENDOR_ID_ZYXEL			0x0586
+
+#define PRODUCT_ID_RTL8150		0x8150
+#define	PRODUCT_ID_LUAKTX		0x0012
+#define	PRODUCT_ID_LCS8138TX		0x401a
+#define PRODUCT_ID_SP128AR		0x0003
+#define	PRODUCT_ID_PRESTIGE		0x401a
+
+#undef	EEPROM_WRITE
+
+/* table of devices that work with this driver */
+static const struct usb_device_id rtl8150_table[] = {
+	{USB_DEVICE(VENDOR_ID_REALTEK, PRODUCT_ID_RTL8150)},
+	{USB_DEVICE(VENDOR_ID_MELCO, PRODUCT_ID_LUAKTX)},
+	{USB_DEVICE(VENDOR_ID_MICRONET, PRODUCT_ID_SP128AR)},
+	{USB_DEVICE(VENDOR_ID_LONGSHINE, PRODUCT_ID_LCS8138TX)},
+	{USB_DEVICE(VENDOR_ID_OQO, PRODUCT_ID_RTL8150)},
+	{USB_DEVICE(VENDOR_ID_ZYXEL, PRODUCT_ID_PRESTIGE)},
+	{}
+};
+
+MODULE_DEVICE_TABLE(usb, rtl8150_table);
+
+struct rtl8150 {
+	unsigned long flags;
+	struct usb_device *udev;
+	struct tasklet_struct tl;
+	struct net_device *netdev;
+	struct urb *rx_urb, *tx_urb, *intr_urb;
+	struct sk_buff *tx_skb, *rx_skb;
+	struct sk_buff *rx_skb_pool[RX_SKB_POOL_SIZE];
+	spinlock_t rx_pool_lock;
+	struct usb_ctrlrequest dr;
+	int intr_interval;
+	u8 *intr_buff;
+	u8 phy;
+};
+
+typedef struct rtl8150 rtl8150_t;
+
+struct async_req {
+	struct usb_ctrlrequest dr;
+	u16 rx_creg;
+};
+
+static const char driver_name [] = "rtl8150";
+
+/*
+**
+**	device related part of the code
+**
+*/
+static int get_registers(rtl8150_t * dev, u16 indx, u16 size, void *data)
+{
+	return usb_control_msg_recv(dev->udev, 0, RTL8150_REQ_GET_REGS,
+				    RTL8150_REQT_READ, indx, 0, data, size,
+				    1000, GFP_NOIO);
+}
+
+static int set_registers(rtl8150_t * dev, u16 indx, u16 size, const void *data)
+{
+	return usb_control_msg_send(dev->udev, 0, RTL8150_REQ_SET_REGS,
+				    RTL8150_REQT_WRITE, indx, 0, data, size,
+				    1000, GFP_NOIO);
+}
+
+static void async_set_reg_cb(struct urb *urb)
+{
+	struct async_req *req = (struct async_req *)urb->context;
+	int status = urb->status;
+
+	if (status < 0)
+		dev_dbg(&urb->dev->dev, "%s failed with %d", __func__, status);
+	kfree(req);
+	usb_free_urb(urb);
+}
+
+static int async_set_registers(rtl8150_t *dev, u16 indx, u16 size, u16 reg)
+{
+	int res = -ENOMEM;
+	struct urb *async_urb;
+	struct async_req *req;
+
+	req = kmalloc(sizeof(struct async_req), GFP_ATOMIC);
+	if (req == NULL)
+		return res;
+	async_urb = usb_alloc_urb(0, GFP_ATOMIC);
+	if (async_urb == NULL) {
+		kfree(req);
+		return res;
+	}
+	req->rx_creg = cpu_to_le16(reg);
+	req->dr.bRequestType = RTL8150_REQT_WRITE;
+	req->dr.bRequest = RTL8150_REQ_SET_REGS;
+	req->dr.wIndex = 0;
+	req->dr.wValue = cpu_to_le16(indx);
+	req->dr.wLength = cpu_to_le16(size);
+	usb_fill_control_urb(async_urb, dev->udev,
+	                     usb_sndctrlpipe(dev->udev, 0), (void *)&req->dr,
+			     &req->rx_creg, size, async_set_reg_cb, req);
+	res = usb_submit_urb(async_urb, GFP_ATOMIC);
+	if (res) {
+		if (res == -ENODEV)
+			netif_device_detach(dev->netdev);
+		dev_err(&dev->udev->dev, "%s failed with %d\n", __func__, res);
+	}
+	return res;
+}
+
+static int read_mii_word(rtl8150_t * dev, u8 phy, __u8 indx, u16 * reg)
+{
+	int i;
+	u8 data[3], tmp;
+
+	data[0] = phy;
+	data[1] = data[2] = 0;
+	tmp = indx | PHY_READ | PHY_GO;
+	i = 0;
+
+	set_registers(dev, PHYADD, sizeof(data), data);
+	set_registers(dev, PHYCNT, 1, &tmp);
+	do {
+		get_registers(dev, PHYCNT, 1, data);
+	} while ((data[0] & PHY_GO) && (i++ < MII_TIMEOUT));
+
+	if (i <= MII_TIMEOUT) {
+		get_registers(dev, PHYDAT, 2, data);
+		*reg = data[0] | (data[1] << 8);
+		return 0;
+	} else
+		return 1;
+}
+
+static int write_mii_word(rtl8150_t * dev, u8 phy, __u8 indx, u16 reg)
+{
+	int i;
+	u8 data[3], tmp;
+
+	data[0] = phy;
+	data[1] = reg & 0xff;
+	data[2] = (reg >> 8) & 0xff;
+	tmp = indx | PHY_WRITE | PHY_GO;
+	i = 0;
+
+	set_registers(dev, PHYADD, sizeof(data), data);
+	set_registers(dev, PHYCNT, 1, &tmp);
+	do {
+		get_registers(dev, PHYCNT, 1, data);
+	} while ((data[0] & PHY_GO) && (i++ < MII_TIMEOUT));
+
+	if (i <= MII_TIMEOUT)
+		return 0;
+	else
+		return 1;
+}
+
+static void set_ethernet_addr(rtl8150_t *dev)
+{
+	u8 node_id[ETH_ALEN];
+	int ret;
+
+	ret = get_registers(dev, IDR, sizeof(node_id), node_id);
+
+	if (!ret) {
+		eth_hw_addr_set(dev->netdev, node_id);
+	} else {
+		eth_hw_addr_random(dev->netdev);
+		netdev_notice(dev->netdev, "Assigned a random MAC address: %pM\n",
+			      dev->netdev->dev_addr);
+	}
+}
+
+static int rtl8150_set_mac_address(struct net_device *netdev, void *p)
+{
+	struct sockaddr *addr = p;
+	rtl8150_t *dev = netdev_priv(netdev);
+
+	if (netif_running(netdev))
+		return -EBUSY;
+
+	eth_hw_addr_set(netdev, addr->sa_data);
+	netdev_dbg(netdev, "Setting MAC address to %pM\n", netdev->dev_addr);
+	/* Set the IDR registers. */
+	set_registers(dev, IDR, netdev->addr_len, netdev->dev_addr);
+#ifdef EEPROM_WRITE
+	{
+	int i;
+	u8 cr;
+	/* Get the CR contents. */
+	get_registers(dev, CR, 1, &cr);
+	/* Set the WEPROM bit (eeprom write enable). */
+	cr |= 0x20;
+	set_registers(dev, CR, 1, &cr);
+	/* Write the MAC address into eeprom. Eeprom writes must be word-sized,
+	   so we need to split them up. */
+	for (i = 0; i * 2 < netdev->addr_len; i++) {
+		set_registers(dev, IDR_EEPROM + (i * 2), 2,
+		netdev->dev_addr + (i * 2));
+	}
+	/* Clear the WEPROM bit (preventing accidental eeprom writes). */
+	cr &= 0xdf;
+	set_registers(dev, CR, 1, &cr);
+	}
+#endif
+	return 0;
+}
+
+static int rtl8150_reset(rtl8150_t * dev)
+{
+	u8 data = 0x10;
+	int i = HZ;
+
+	set_registers(dev, CR, 1, &data);
+	do {
+		get_registers(dev, CR, 1, &data);
+	} while ((data & 0x10) && --i);
+
+	return (i > 0) ? 1 : 0;
+}
+
+static int alloc_all_urbs(rtl8150_t * dev)
+{
+	dev->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
+	if (!dev->rx_urb)
+		return 0;
+	dev->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
+	if (!dev->tx_urb) {
+		usb_free_urb(dev->rx_urb);
+		return 0;
+	}
+	dev->intr_urb = usb_alloc_urb(0, GFP_KERNEL);
+	if (!dev->intr_urb) {
+		usb_free_urb(dev->rx_urb);
+		usb_free_urb(dev->tx_urb);
+		return 0;
+	}
+
+	return 1;
+}
+
+static void free_all_urbs(rtl8150_t * dev)
+{
+	usb_free_urb(dev->rx_urb);
+	usb_free_urb(dev->tx_urb);
+	usb_free_urb(dev->intr_urb);
+}
+
+static void unlink_all_urbs(rtl8150_t * dev)
+{
+	usb_kill_urb(dev->rx_urb);
+	usb_kill_urb(dev->tx_urb);
+	usb_kill_urb(dev->intr_urb);
+}
+
+static inline struct sk_buff *pull_skb(rtl8150_t *dev)
+{
+	struct sk_buff *skb;
+	int i;
+
+	for (i = 0; i < RX_SKB_POOL_SIZE; i++) {
+		if (dev->rx_skb_pool[i]) {
+			skb = dev->rx_skb_pool[i];
+			dev->rx_skb_pool[i] = NULL;
+			return skb;
+		}
+	}
+	return NULL;
+}
+
+static void read_bulk_callback(struct urb *urb)
+{
+	rtl8150_t *dev;
+	unsigned pkt_len, res;
+	struct sk_buff *skb;
+	struct net_device *netdev;
+	int status = urb->status;
+	int result;
+	unsigned long flags;
+
+	dev = urb->context;
+	if (!dev)
+		return;
+	if (test_bit(RTL8150_UNPLUG, &dev->flags))
+		return;
+	netdev = dev->netdev;
+	if (!netif_device_present(netdev))
+		return;
+
+	switch (status) {
+	case 0:
+		break;
+	case -ENOENT:
+		return;	/* the urb is in unlink state */
+	case -ETIME:
+		if (printk_ratelimit())
+			dev_warn(&urb->dev->dev, "may be reset is needed?..\n");
+		goto goon;
+	default:
+		if (printk_ratelimit())
+			dev_warn(&urb->dev->dev, "Rx status %d\n", status);
+		goto goon;
+	}
+
+	if (!dev->rx_skb)
+		goto resched;
+	/* protect against short packets (tell me why we got some?!?) */
+	if (urb->actual_length < 4)
+		goto goon;
+
+	res = urb->actual_length;
+	pkt_len = res - 4;
+
+	skb_put(dev->rx_skb, pkt_len);
+	dev->rx_skb->protocol = eth_type_trans(dev->rx_skb, netdev);
+	netif_rx(dev->rx_skb);
+	netdev->stats.rx_packets++;
+	netdev->stats.rx_bytes += pkt_len;
+
+	spin_lock_irqsave(&dev->rx_pool_lock, flags);
+	skb = pull_skb(dev);
+	spin_unlock_irqrestore(&dev->rx_pool_lock, flags);
+	if (!skb)
+		goto resched;
+
+	dev->rx_skb = skb;
+goon:
+	usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
+		      dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
+	result = usb_submit_urb(dev->rx_urb, GFP_ATOMIC);
+	if (result == -ENODEV)
+		netif_device_detach(dev->netdev);
+	else if (result) {
+		set_bit(RX_URB_FAIL, &dev->flags);
+		goto resched;
+	} else {
+		clear_bit(RX_URB_FAIL, &dev->flags);
+	}
+
+	return;
+resched:
+	tasklet_schedule(&dev->tl);
+}
+
+static void write_bulk_callback(struct urb *urb)
+{
+	rtl8150_t *dev;
+	int status = urb->status;
+
+	dev = urb->context;
+	if (!dev)
+		return;
+	dev_kfree_skb_irq(dev->tx_skb);
+	if (!netif_device_present(dev->netdev))
+		return;
+	if (status)
+		dev_info(&urb->dev->dev, "%s: Tx status %d\n",
+			 dev->netdev->name, status);
+	netif_trans_update(dev->netdev);
+	netif_wake_queue(dev->netdev);
+}
+
+static void intr_callback(struct urb *urb)
+{
+	rtl8150_t *dev;
+	__u8 *d;
+	int status = urb->status;
+	int res;
+
+	dev = urb->context;
+	if (!dev)
+		return;
+	switch (status) {
+	case 0:			/* success */
+		break;
+	case -ECONNRESET:	/* unlink */
+	case -ENOENT:
+	case -ESHUTDOWN:
+		return;
+	/* -EPIPE:  should clear the halt */
+	default:
+		dev_info(&urb->dev->dev, "%s: intr status %d\n",
+			 dev->netdev->name, status);
+		goto resubmit;
+	}
+
+	d = urb->transfer_buffer;
+	if (d[0] & TSR_ERRORS) {
+		dev->netdev->stats.tx_errors++;
+		if (d[INT_TSR] & (TSR_ECOL | TSR_JBR))
+			dev->netdev->stats.tx_aborted_errors++;
+		if (d[INT_TSR] & TSR_LCOL)
+			dev->netdev->stats.tx_window_errors++;
+		if (d[INT_TSR] & TSR_LOSS_CRS)
+			dev->netdev->stats.tx_carrier_errors++;
+	}
+	/* Report link status changes to the network stack */
+	if ((d[INT_MSR] & MSR_LINK) == 0) {
+		if (netif_carrier_ok(dev->netdev)) {
+			netif_carrier_off(dev->netdev);
+			netdev_dbg(dev->netdev, "%s: LINK LOST\n", __func__);
+		}
+	} else {
+		if (!netif_carrier_ok(dev->netdev)) {
+			netif_carrier_on(dev->netdev);
+			netdev_dbg(dev->netdev, "%s: LINK CAME BACK\n", __func__);
+		}
+	}
+
+resubmit:
+	res = usb_submit_urb (urb, GFP_ATOMIC);
+	if (res == -ENODEV)
+		netif_device_detach(dev->netdev);
+	else if (res)
+		dev_err(&dev->udev->dev,
+			"can't resubmit intr, %s-%s/input0, status %d\n",
+			dev->udev->bus->bus_name, dev->udev->devpath, res);
+}
+
+static int rtl8150_suspend(struct usb_interface *intf, pm_message_t message)
+{
+	rtl8150_t *dev = usb_get_intfdata(intf);
+
+	netif_device_detach(dev->netdev);
+
+	if (netif_running(dev->netdev)) {
+		usb_kill_urb(dev->rx_urb);
+		usb_kill_urb(dev->intr_urb);
+	}
+	return 0;
+}
+
+static int rtl8150_resume(struct usb_interface *intf)
+{
+	rtl8150_t *dev = usb_get_intfdata(intf);
+
+	netif_device_attach(dev->netdev);
+	if (netif_running(dev->netdev)) {
+		dev->rx_urb->status = 0;
+		dev->rx_urb->actual_length = 0;
+		read_bulk_callback(dev->rx_urb);
+
+		dev->intr_urb->status = 0;
+		dev->intr_urb->actual_length = 0;
+		intr_callback(dev->intr_urb);
+	}
+	return 0;
+}
+
+/*
+**
+**	network related part of the code
+**
+*/
+
+static void fill_skb_pool(rtl8150_t *dev)
+{
+	struct sk_buff *skb;
+	int i;
+
+	for (i = 0; i < RX_SKB_POOL_SIZE; i++) {
+		if (dev->rx_skb_pool[i])
+			continue;
+		skb = dev_alloc_skb(RTL8150_MTU + 2);
+		if (!skb) {
+			return;
+		}
+		skb_reserve(skb, 2);
+		dev->rx_skb_pool[i] = skb;
+	}
+}
+
+static void free_skb_pool(rtl8150_t *dev)
+{
+	int i;
+
+	for (i = 0; i < RX_SKB_POOL_SIZE; i++)
+		dev_kfree_skb(dev->rx_skb_pool[i]);
+}
+
+static void rx_fixup(struct tasklet_struct *t)
+{
+	struct rtl8150 *dev = from_tasklet(dev, t, tl);
+	struct sk_buff *skb;
+	int status;
+
+	spin_lock_irq(&dev->rx_pool_lock);
+	fill_skb_pool(dev);
+	spin_unlock_irq(&dev->rx_pool_lock);
+	if (test_bit(RX_URB_FAIL, &dev->flags))
+		if (dev->rx_skb)
+			goto try_again;
+	spin_lock_irq(&dev->rx_pool_lock);
+	skb = pull_skb(dev);
+	spin_unlock_irq(&dev->rx_pool_lock);
+	if (skb == NULL)
+		goto tlsched;
+	dev->rx_skb = skb;
+	usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
+		      dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
+try_again:
+	status = usb_submit_urb(dev->rx_urb, GFP_ATOMIC);
+	if (status == -ENODEV) {
+		netif_device_detach(dev->netdev);
+	} else if (status) {
+		set_bit(RX_URB_FAIL, &dev->flags);
+		goto tlsched;
+	} else {
+		clear_bit(RX_URB_FAIL, &dev->flags);
+	}
+
+	return;
+tlsched:
+	tasklet_schedule(&dev->tl);
+}
+
+static int enable_net_traffic(rtl8150_t * dev)
+{
+	u8 cr, tcr, rcr, msr;
+
+	if (!rtl8150_reset(dev)) {
+		dev_warn(&dev->udev->dev, "device reset failed\n");
+	}
+	/* RCR bit7=1 attach Rx info at the end;  =0 HW CRC (which is broken) */
+	rcr = 0x9e;
+	tcr = 0xd8;
+	cr = 0x0c;
+	if (!(rcr & 0x80))
+		set_bit(RTL8150_HW_CRC, &dev->flags);
+	set_registers(dev, RCR, 1, &rcr);
+	set_registers(dev, TCR, 1, &tcr);
+	set_registers(dev, CR, 1, &cr);
+	get_registers(dev, MSR, 1, &msr);
+
+	return 0;
+}
+
+static void disable_net_traffic(rtl8150_t * dev)
+{
+	u8 cr;
+
+	get_registers(dev, CR, 1, &cr);
+	cr &= 0xf3;
+	set_registers(dev, CR, 1, &cr);
+}
+
+static void rtl8150_tx_timeout(struct net_device *netdev, unsigned int txqueue)
+{
+	rtl8150_t *dev = netdev_priv(netdev);
+	dev_warn(&netdev->dev, "Tx timeout.\n");
+	usb_unlink_urb(dev->tx_urb);
+	netdev->stats.tx_errors++;
+}
+
+static void rtl8150_set_multicast(struct net_device *netdev)
+{
+	rtl8150_t *dev = netdev_priv(netdev);
+	u16 rx_creg = 0x9e;
+
+	netif_stop_queue(netdev);
+	if (netdev->flags & IFF_PROMISC) {
+		rx_creg |= 0x0001;
+		dev_info(&netdev->dev, "%s: promiscuous mode\n", netdev->name);
+	} else if (!netdev_mc_empty(netdev) ||
+		   (netdev->flags & IFF_ALLMULTI)) {
+		rx_creg &= 0xfffe;
+		rx_creg |= 0x0002;
+		dev_dbg(&netdev->dev, "%s: allmulti set\n", netdev->name);
+	} else {
+		/* ~RX_MULTICAST, ~RX_PROMISCUOUS */
+		rx_creg &= 0x00fc;
+	}
+	async_set_registers(dev, RCR, sizeof(rx_creg), rx_creg);
+	netif_wake_queue(netdev);
+}
+
+static netdev_tx_t rtl8150_start_xmit(struct sk_buff *skb,
+					    struct net_device *netdev)
+{
+	rtl8150_t *dev = netdev_priv(netdev);
+	int count, res;
+
+	netif_stop_queue(netdev);
+	count = (skb->len < 60) ? 60 : skb->len;
+	count = (count & 0x3f) ? count : count + 1;
+	dev->tx_skb = skb;
+	usb_fill_bulk_urb(dev->tx_urb, dev->udev, usb_sndbulkpipe(dev->udev, 2),
+		      skb->data, count, write_bulk_callback, dev);
+	if ((res = usb_submit_urb(dev->tx_urb, GFP_ATOMIC))) {
+		/* Can we get/handle EPIPE here? */
+		if (res == -ENODEV)
+			netif_device_detach(dev->netdev);
+		else {
+			dev_warn(&netdev->dev, "failed tx_urb %d\n", res);
+			netdev->stats.tx_errors++;
+			netif_start_queue(netdev);
+		}
+	} else {
+		netdev->stats.tx_packets++;
+		netdev->stats.tx_bytes += skb->len;
+		netif_trans_update(netdev);
+	}
+
+	return NETDEV_TX_OK;
+}
+
+
+static void set_carrier(struct net_device *netdev)
+{
+	rtl8150_t *dev = netdev_priv(netdev);
+	short tmp;
+
+	get_registers(dev, CSCR, 2, &tmp);
+	if (tmp & CSCR_LINK_STATUS)
+		netif_carrier_on(netdev);
+	else
+		netif_carrier_off(netdev);
+}
+
+static int rtl8150_open(struct net_device *netdev)
+{
+	rtl8150_t *dev = netdev_priv(netdev);
+	int res;
+
+	if (dev->rx_skb == NULL)
+		dev->rx_skb = pull_skb(dev);
+	if (!dev->rx_skb)
+		return -ENOMEM;
+
+	set_registers(dev, IDR, 6, netdev->dev_addr);
+
+	usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
+		      dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
+	if ((res = usb_submit_urb(dev->rx_urb, GFP_KERNEL))) {
+		if (res == -ENODEV)
+			netif_device_detach(dev->netdev);
+		dev_warn(&netdev->dev, "rx_urb submit failed: %d\n", res);
+		return res;
+	}
+	usb_fill_int_urb(dev->intr_urb, dev->udev, usb_rcvintpipe(dev->udev, 3),
+		     dev->intr_buff, INTBUFSIZE, intr_callback,
+		     dev, dev->intr_interval);
+	if ((res = usb_submit_urb(dev->intr_urb, GFP_KERNEL))) {
+		if (res == -ENODEV)
+			netif_device_detach(dev->netdev);
+		dev_warn(&netdev->dev, "intr_urb submit failed: %d\n", res);
+		usb_kill_urb(dev->rx_urb);
+		return res;
+	}
+	enable_net_traffic(dev);
+	set_carrier(netdev);
+	netif_start_queue(netdev);
+
+	return res;
+}
+
+static int rtl8150_close(struct net_device *netdev)
+{
+	rtl8150_t *dev = netdev_priv(netdev);
+
+	netif_stop_queue(netdev);
+	if (!test_bit(RTL8150_UNPLUG, &dev->flags))
+		disable_net_traffic(dev);
+	unlink_all_urbs(dev);
+
+	return 0;
+}
+
+static void rtl8150_get_drvinfo(struct net_device *netdev, struct ethtool_drvinfo *info)
+{
+	rtl8150_t *dev = netdev_priv(netdev);
+
+	strscpy(info->driver, driver_name, sizeof(info->driver));
+	strscpy(info->version, DRIVER_VERSION, sizeof(info->version));
+	usb_make_path(dev->udev, info->bus_info, sizeof(info->bus_info));
+}
+
+static int rtl8150_get_link_ksettings(struct net_device *netdev,
+				      struct ethtool_link_ksettings *ecmd)
+{
+	rtl8150_t *dev = netdev_priv(netdev);
+	short lpa, bmcr;
+	u32 supported;
+
+	supported = (SUPPORTED_10baseT_Half |
+			  SUPPORTED_10baseT_Full |
+			  SUPPORTED_100baseT_Half |
+			  SUPPORTED_100baseT_Full |
+			  SUPPORTED_Autoneg |
+			  SUPPORTED_TP | SUPPORTED_MII);
+	ecmd->base.port = PORT_TP;
+	ecmd->base.phy_address = dev->phy;
+	get_registers(dev, BMCR, 2, &bmcr);
+	get_registers(dev, ANLP, 2, &lpa);
+	if (bmcr & BMCR_ANENABLE) {
+		u32 speed = ((lpa & (LPA_100HALF | LPA_100FULL)) ?
+			     SPEED_100 : SPEED_10);
+		ecmd->base.speed = speed;
+		ecmd->base.autoneg = AUTONEG_ENABLE;
+		if (speed == SPEED_100)
+			ecmd->base.duplex = (lpa & LPA_100FULL) ?
+			    DUPLEX_FULL : DUPLEX_HALF;
+		else
+			ecmd->base.duplex = (lpa & LPA_10FULL) ?
+			    DUPLEX_FULL : DUPLEX_HALF;
+	} else {
+		ecmd->base.autoneg = AUTONEG_DISABLE;
+		ecmd->base.speed = ((bmcr & BMCR_SPEED100) ?
+					     SPEED_100 : SPEED_10);
+		ecmd->base.duplex = (bmcr & BMCR_FULLDPLX) ?
+		    DUPLEX_FULL : DUPLEX_HALF;
+	}
+
+	ethtool_convert_legacy_u32_to_link_mode(ecmd->link_modes.supported,
+						supported);
+
+	return 0;
+}
+
+static const struct ethtool_ops ops = {
+	.get_drvinfo = rtl8150_get_drvinfo,
+	.get_link = ethtool_op_get_link,
+	.get_link_ksettings = rtl8150_get_link_ksettings,
+};
+
+static int rtl8150_siocdevprivate(struct net_device *netdev, struct ifreq *rq,
+				  void __user *udata, int cmd)
+{
+	rtl8150_t *dev = netdev_priv(netdev);
+	u16 *data = (u16 *) & rq->ifr_ifru;
+	int res = 0;
+
+	switch (cmd) {
+	case SIOCDEVPRIVATE:
+		data[0] = dev->phy;
+		fallthrough;
+	case SIOCDEVPRIVATE + 1:
+		read_mii_word(dev, dev->phy, (data[1] & 0x1f), &data[3]);
+		break;
+	case SIOCDEVPRIVATE + 2:
+		if (!capable(CAP_NET_ADMIN))
+			return -EPERM;
+		write_mii_word(dev, dev->phy, (data[1] & 0x1f), data[2]);
+		break;
+	default:
+		res = -EOPNOTSUPP;
+	}
+
+	return res;
+}
+
+static const struct net_device_ops rtl8150_netdev_ops = {
+	.ndo_open		= rtl8150_open,
+	.ndo_stop		= rtl8150_close,
+	.ndo_siocdevprivate	= rtl8150_siocdevprivate,
+	.ndo_start_xmit		= rtl8150_start_xmit,
+	.ndo_tx_timeout		= rtl8150_tx_timeout,
+	.ndo_set_rx_mode	= rtl8150_set_multicast,
+	.ndo_set_mac_address	= rtl8150_set_mac_address,
+
+	.ndo_validate_addr	= eth_validate_addr,
+};
+
+static int rtl8150_probe(struct usb_interface *intf,
+			 const struct usb_device_id *id)
+{
+	struct usb_device *udev = interface_to_usbdev(intf);
+	rtl8150_t *dev;
+	struct net_device *netdev;
+
+	netdev = alloc_etherdev(sizeof(rtl8150_t));
+	if (!netdev)
+		return -ENOMEM;
+
+	dev = netdev_priv(netdev);
+
+	dev->intr_buff = kmalloc(INTBUFSIZE, GFP_KERNEL);
+	if (!dev->intr_buff) {
+		free_netdev(netdev);
+		return -ENOMEM;
+	}
+
+	tasklet_setup(&dev->tl, rx_fixup);
+	spin_lock_init(&dev->rx_pool_lock);
+
+	dev->udev = udev;
+	dev->netdev = netdev;
+	netdev->netdev_ops = &rtl8150_netdev_ops;
+	netdev->watchdog_timeo = RTL8150_TX_TIMEOUT;
+	netdev->ethtool_ops = &ops;
+	dev->intr_interval = 100;	/* 100ms */
+
+	if (!alloc_all_urbs(dev)) {
+		dev_err(&intf->dev, "out of memory\n");
+		goto out;
+	}
+	if (!rtl8150_reset(dev)) {
+		dev_err(&intf->dev, "couldn't reset the device\n");
+		goto out1;
+	}
+	fill_skb_pool(dev);
+	set_ethernet_addr(dev);
+
+	usb_set_intfdata(intf, dev);
+	SET_NETDEV_DEV(netdev, &intf->dev);
+	if (register_netdev(netdev) != 0) {
+		dev_err(&intf->dev, "couldn't register the device\n");
+		goto out2;
+	}
+
+	dev_info(&intf->dev, "%s: rtl8150 is detected\n", netdev->name);
+
+	return 0;
+
+out2:
+	usb_set_intfdata(intf, NULL);
+	free_skb_pool(dev);
+out1:
+	free_all_urbs(dev);
+out:
+	kfree(dev->intr_buff);
+	free_netdev(netdev);
+	return -EIO;
+}
+
+static void rtl8150_disconnect(struct usb_interface *intf)
+{
+	rtl8150_t *dev = usb_get_intfdata(intf);
+
+	usb_set_intfdata(intf, NULL);
+	if (dev) {
+		set_bit(RTL8150_UNPLUG, &dev->flags);
+		tasklet_kill(&dev->tl);
+		unregister_netdev(dev->netdev);
+		unlink_all_urbs(dev);
+		free_all_urbs(dev);
+		free_skb_pool(dev);
+		dev_kfree_skb(dev->rx_skb);
+		kfree(dev->intr_buff);
+		free_netdev(dev->netdev);
+	}
+}
+
+static struct usb_driver rtl8150_driver = {
+	.name		= driver_name,
+	.probe		= rtl8150_probe,
+	.disconnect	= rtl8150_disconnect,
+	.id_table	= rtl8150_table,
+	.suspend	= rtl8150_suspend,
+	.resume		= rtl8150_resume,
+	.disable_hub_initiated_lpm = 1,
+};
+
+module_usb_driver(rtl8150_driver);
+
+MODULE_AUTHOR(DRIVER_AUTHOR);
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_LICENSE("GPL");