Adding upstream version 6.6.15.upstream/6.6.15

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

1 files changed, 1336 insertions, 0 deletions

diff --git a/drivers/net/usb/pegasus.c b/drivers/net/usb/pegasus.c
new file mode 100644
index 0000000000..81ca64debc
--- /dev/null
+++ b/drivers/net/usb/pegasus.c
@@ -0,0 +1,1336 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ *  Copyright (c) 1999-2021 Petko Manolov (petkan@nucleusys.com)
+ *
+ */
+
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/ethtool.h>
+#include <linux/mii.h>
+#include <linux/usb.h>
+#include <linux/module.h>
+#include <asm/byteorder.h>
+#include <linux/uaccess.h>
+#include "pegasus.h"
+
+/*
+ * Version Information
+ */
+#define DRIVER_AUTHOR "Petko Manolov <petkan@nucleusys.com>"
+#define DRIVER_DESC "Pegasus/Pegasus II USB Ethernet driver"
+
+static const char driver_name[] = "pegasus";
+
+#undef	PEGASUS_WRITE_EEPROM
+#define	BMSR_MEDIA	(BMSR_10HALF | BMSR_10FULL | BMSR_100HALF | \
+			BMSR_100FULL | BMSR_ANEGCAPABLE)
+#define CARRIER_CHECK_DELAY (2 * HZ)
+
+static bool loopback;
+static bool mii_mode;
+static char *devid;
+
+static struct usb_eth_dev usb_dev_id[] = {
+#define	PEGASUS_DEV(pn, vid, pid, flags)	\
+	{.name = pn, .vendor = vid, .device = pid, .private = flags},
+#define PEGASUS_DEV_CLASS(pn, vid, pid, dclass, flags) \
+	PEGASUS_DEV(pn, vid, pid, flags)
+#include "pegasus.h"
+#undef	PEGASUS_DEV
+#undef	PEGASUS_DEV_CLASS
+	{NULL, 0, 0, 0},
+	{NULL, 0, 0, 0}
+};
+
+static struct usb_device_id pegasus_ids[] = {
+#define	PEGASUS_DEV(pn, vid, pid, flags) \
+	{.match_flags = USB_DEVICE_ID_MATCH_DEVICE, .idVendor = vid, .idProduct = pid},
+/*
+ * The Belkin F8T012xx1 bluetooth adaptor has the same vendor and product
+ * IDs as the Belkin F5D5050, so we need to teach the pegasus driver to
+ * ignore adaptors belonging to the "Wireless" class 0xE0. For this one
+ * case anyway, seeing as the pegasus is for "Wired" adaptors.
+ */
+#define PEGASUS_DEV_CLASS(pn, vid, pid, dclass, flags) \
+	{.match_flags = (USB_DEVICE_ID_MATCH_DEVICE | USB_DEVICE_ID_MATCH_DEV_CLASS), \
+	.idVendor = vid, .idProduct = pid, .bDeviceClass = dclass},
+#include "pegasus.h"
+#undef	PEGASUS_DEV
+#undef	PEGASUS_DEV_CLASS
+	{},
+	{}
+};
+
+MODULE_AUTHOR(DRIVER_AUTHOR);
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_LICENSE("GPL");
+module_param(loopback, bool, 0);
+module_param(mii_mode, bool, 0);
+module_param(devid, charp, 0);
+MODULE_PARM_DESC(loopback, "Enable MAC loopback mode (bit 0)");
+MODULE_PARM_DESC(mii_mode, "Enable HomePNA mode (bit 0),default=MII mode = 0");
+MODULE_PARM_DESC(devid, "The format is: 'DEV_name:VendorID:DeviceID:Flags'");
+
+/* 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");
+
+MODULE_DEVICE_TABLE(usb, pegasus_ids);
+static const struct net_device_ops pegasus_netdev_ops;
+
+/*****/
+
+static void async_ctrl_callback(struct urb *urb)
+{
+	struct usb_ctrlrequest *req = (struct usb_ctrlrequest *)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 get_registers(pegasus_t *pegasus, __u16 indx, __u16 size, void *data)
+{
+	return usb_control_msg_recv(pegasus->usb, 0, PEGASUS_REQ_GET_REGS,
+				   PEGASUS_REQT_READ, 0, indx, data, size,
+				   1000, GFP_NOIO);
+}
+
+static int set_registers(pegasus_t *pegasus, __u16 indx, __u16 size,
+			 const void *data)
+{
+	int ret;
+
+	ret = usb_control_msg_send(pegasus->usb, 0, PEGASUS_REQ_SET_REGS,
+				    PEGASUS_REQT_WRITE, 0, indx, data, size,
+				    1000, GFP_NOIO);
+	if (ret < 0)
+		netif_dbg(pegasus, drv, pegasus->net, "%s failed with %d\n", __func__, ret);
+
+	return ret;
+}
+
+/*
+ * There is only one way to write to a single ADM8511 register and this is via
+ * specific control request.  'data' is ignored by the device, but it is here to
+ * not break the API.
+ */
+static int set_register(pegasus_t *pegasus, __u16 indx, __u8 data)
+{
+	void *buf = &data;
+	int ret;
+
+	ret = usb_control_msg_send(pegasus->usb, 0, PEGASUS_REQ_SET_REG,
+				    PEGASUS_REQT_WRITE, data, indx, buf, 1,
+				    1000, GFP_NOIO);
+	if (ret < 0)
+		netif_dbg(pegasus, drv, pegasus->net, "%s failed with %d\n", __func__, ret);
+
+	return ret;
+}
+
+static int update_eth_regs_async(pegasus_t *pegasus)
+{
+	int ret = -ENOMEM;
+	struct urb *async_urb;
+	struct usb_ctrlrequest *req;
+
+	req = kmalloc(sizeof(struct usb_ctrlrequest), GFP_ATOMIC);
+	if (req == NULL)
+		return ret;
+
+	async_urb = usb_alloc_urb(0, GFP_ATOMIC);
+	if (async_urb == NULL) {
+		kfree(req);
+		return ret;
+	}
+	req->bRequestType = PEGASUS_REQT_WRITE;
+	req->bRequest = PEGASUS_REQ_SET_REGS;
+	req->wValue = cpu_to_le16(0);
+	req->wIndex = cpu_to_le16(EthCtrl0);
+	req->wLength = cpu_to_le16(3);
+
+	usb_fill_control_urb(async_urb, pegasus->usb,
+			     usb_sndctrlpipe(pegasus->usb, 0), (void *)req,
+			     pegasus->eth_regs, 3, async_ctrl_callback, req);
+
+	ret = usb_submit_urb(async_urb, GFP_ATOMIC);
+	if (ret) {
+		if (ret == -ENODEV)
+			netif_device_detach(pegasus->net);
+		netif_err(pegasus, drv, pegasus->net,
+			  "%s returned %d\n", __func__, ret);
+	}
+	return ret;
+}
+
+static int __mii_op(pegasus_t *p, __u8 phy, __u8 indx, __u16 *regd, __u8 cmd)
+{
+	int i, ret;
+	__le16 regdi;
+	__u8 data[4] = { phy, 0, 0, indx };
+
+	if (cmd & PHY_WRITE) {
+		__le16 *t = (__le16 *) & data[1];
+		*t = cpu_to_le16(*regd);
+	}
+	set_register(p, PhyCtrl, 0);
+	set_registers(p, PhyAddr, sizeof(data), data);
+	set_register(p, PhyCtrl, (indx | cmd));
+	for (i = 0; i < REG_TIMEOUT; i++) {
+		ret = get_registers(p, PhyCtrl, 1, data);
+		if (ret < 0)
+			goto fail;
+		if (data[0] & PHY_DONE)
+			break;
+	}
+	if (i >= REG_TIMEOUT) {
+		ret = -ETIMEDOUT;
+		goto fail;
+	}
+	if (cmd & PHY_READ) {
+		ret = get_registers(p, PhyData, 2, &regdi);
+		if (ret < 0)
+			goto fail;
+		*regd = le16_to_cpu(regdi);
+	}
+	return 0;
+fail:
+	netif_dbg(p, drv, p->net, "%s failed\n", __func__);
+	return ret;
+}
+
+/* Returns non-negative int on success, error on failure */
+static int read_mii_word(pegasus_t *pegasus, __u8 phy, __u8 indx, __u16 *regd)
+{
+	return __mii_op(pegasus, phy, indx, regd, PHY_READ);
+}
+
+/* Returns zero on success, error on failure */
+static int write_mii_word(pegasus_t *pegasus, __u8 phy, __u8 indx, __u16 *regd)
+{
+	return __mii_op(pegasus, phy, indx, regd, PHY_WRITE);
+}
+
+static int mdio_read(struct net_device *dev, int phy_id, int loc)
+{
+	pegasus_t *pegasus = netdev_priv(dev);
+	int ret;
+	u16 res;
+
+	ret = read_mii_word(pegasus, phy_id, loc, &res);
+	if (ret < 0)
+		return ret;
+
+	return (int)res;
+}
+
+static void mdio_write(struct net_device *dev, int phy_id, int loc, int val)
+{
+	pegasus_t *pegasus = netdev_priv(dev);
+	u16 data = val;
+
+	write_mii_word(pegasus, phy_id, loc, &data);
+}
+
+static int read_eprom_word(pegasus_t *pegasus, __u8 index, __u16 *retdata)
+{
+	int ret, i;
+	__le16 retdatai;
+	__u8 tmp = 0;
+
+	set_register(pegasus, EpromCtrl, 0);
+	set_register(pegasus, EpromOffset, index);
+	set_register(pegasus, EpromCtrl, EPROM_READ);
+
+	for (i = 0; i < REG_TIMEOUT; i++) {
+		ret = get_registers(pegasus, EpromCtrl, 1, &tmp);
+		if (ret < 0)
+			goto fail;
+		if (tmp & EPROM_DONE)
+			break;
+	}
+	if (i >= REG_TIMEOUT) {
+		ret = -ETIMEDOUT;
+		goto fail;
+	}
+
+	ret = get_registers(pegasus, EpromData, 2, &retdatai);
+	if (ret < 0)
+		goto fail;
+	*retdata = le16_to_cpu(retdatai);
+	return ret;
+
+fail:
+	netif_dbg(pegasus, drv, pegasus->net, "%s failed\n", __func__);
+	return ret;
+}
+
+#ifdef	PEGASUS_WRITE_EEPROM
+static inline void enable_eprom_write(pegasus_t *pegasus)
+{
+	__u8 tmp;
+
+	get_registers(pegasus, EthCtrl2, 1, &tmp);
+	set_register(pegasus, EthCtrl2, tmp | EPROM_WR_ENABLE);
+}
+
+static inline void disable_eprom_write(pegasus_t *pegasus)
+{
+	__u8 tmp;
+
+	get_registers(pegasus, EthCtrl2, 1, &tmp);
+	set_register(pegasus, EpromCtrl, 0);
+	set_register(pegasus, EthCtrl2, tmp & ~EPROM_WR_ENABLE);
+}
+
+static int write_eprom_word(pegasus_t *pegasus, __u8 index, __u16 data)
+{
+	int i;
+	__u8 tmp, d[4] = { 0x3f, 0, 0, EPROM_WRITE };
+	int ret;
+	__le16 le_data = cpu_to_le16(data);
+
+	set_registers(pegasus, EpromOffset, 4, d);
+	enable_eprom_write(pegasus);
+	set_register(pegasus, EpromOffset, index);
+	set_registers(pegasus, EpromData, 2, &le_data);
+	set_register(pegasus, EpromCtrl, EPROM_WRITE);
+
+	for (i = 0; i < REG_TIMEOUT; i++) {
+		ret = get_registers(pegasus, EpromCtrl, 1, &tmp);
+		if (ret == -ESHUTDOWN)
+			goto fail;
+		if (tmp & EPROM_DONE)
+			break;
+	}
+	disable_eprom_write(pegasus);
+	if (i >= REG_TIMEOUT)
+		goto fail;
+
+	return ret;
+
+fail:
+	netif_dbg(pegasus, drv, pegasus->net, "%s failed\n", __func__);
+	return -ETIMEDOUT;
+}
+#endif	/* PEGASUS_WRITE_EEPROM */
+
+static inline int get_node_id(pegasus_t *pegasus, u8 *id)
+{
+	int i, ret;
+	u16 w16;
+
+	for (i = 0; i < 3; i++) {
+		ret = read_eprom_word(pegasus, i, &w16);
+		if (ret < 0)
+			return ret;
+		((__le16 *) id)[i] = cpu_to_le16(w16);
+	}
+
+	return 0;
+}
+
+static void set_ethernet_addr(pegasus_t *pegasus)
+{
+	int ret;
+	u8 node_id[6];
+
+	if (pegasus->features & PEGASUS_II) {
+		ret = get_registers(pegasus, 0x10, sizeof(node_id), node_id);
+		if (ret < 0)
+			goto err;
+	} else {
+		ret = get_node_id(pegasus, node_id);
+		if (ret < 0)
+			goto err;
+		ret = set_registers(pegasus, EthID, sizeof(node_id), node_id);
+		if (ret < 0)
+			goto err;
+	}
+
+	eth_hw_addr_set(pegasus->net, node_id);
+
+	return;
+err:
+	eth_hw_addr_random(pegasus->net);
+	netif_dbg(pegasus, drv, pegasus->net, "software assigned MAC address.\n");
+
+	return;
+}
+
+static inline int reset_mac(pegasus_t *pegasus)
+{
+	int ret, i;
+	__u8 data = 0x8;
+
+	set_register(pegasus, EthCtrl1, data);
+	for (i = 0; i < REG_TIMEOUT; i++) {
+		ret = get_registers(pegasus, EthCtrl1, 1, &data);
+		if (ret < 0)
+			goto fail;
+		if (~data & 0x08) {
+			if (loopback)
+				break;
+			if (mii_mode && (pegasus->features & HAS_HOME_PNA))
+				set_register(pegasus, Gpio1, 0x34);
+			else
+				set_register(pegasus, Gpio1, 0x26);
+			set_register(pegasus, Gpio0, pegasus->features);
+			set_register(pegasus, Gpio0, DEFAULT_GPIO_SET);
+			break;
+		}
+	}
+	if (i == REG_TIMEOUT)
+		return -ETIMEDOUT;
+
+	if (usb_dev_id[pegasus->dev_index].vendor == VENDOR_LINKSYS ||
+	    usb_dev_id[pegasus->dev_index].vendor == VENDOR_DLINK) {
+		set_register(pegasus, Gpio0, 0x24);
+		set_register(pegasus, Gpio0, 0x26);
+	}
+	if (usb_dev_id[pegasus->dev_index].vendor == VENDOR_ELCON) {
+		__u16 auxmode;
+		ret = read_mii_word(pegasus, 3, 0x1b, &auxmode);
+		if (ret < 0)
+			goto fail;
+		auxmode |= 4;
+		write_mii_word(pegasus, 3, 0x1b, &auxmode);
+	}
+
+	return 0;
+fail:
+	netif_dbg(pegasus, drv, pegasus->net, "%s failed\n", __func__);
+	return ret;
+}
+
+static int enable_net_traffic(struct net_device *dev, struct usb_device *usb)
+{
+	pegasus_t *pegasus = netdev_priv(dev);
+	int ret;
+	__u16 linkpart;
+	__u8 data[4];
+
+	ret = read_mii_word(pegasus, pegasus->phy, MII_LPA, &linkpart);
+	if (ret < 0)
+		goto fail;
+	data[0] = 0xc8; /* TX & RX enable, append status, no CRC */
+	data[1] = 0;
+	if (linkpart & (ADVERTISE_100FULL | ADVERTISE_10FULL))
+		data[1] |= 0x20;	/* set full duplex */
+	if (linkpart & (ADVERTISE_100FULL | ADVERTISE_100HALF))
+		data[1] |= 0x10;	/* set 100 Mbps */
+	if (mii_mode)
+		data[1] = 0;
+	data[2] = loopback ? 0x09 : 0x01;
+
+	memcpy(pegasus->eth_regs, data, sizeof(data));
+	ret = set_registers(pegasus, EthCtrl0, 3, data);
+
+	if (usb_dev_id[pegasus->dev_index].vendor == VENDOR_LINKSYS ||
+	    usb_dev_id[pegasus->dev_index].vendor == VENDOR_LINKSYS2 ||
+	    usb_dev_id[pegasus->dev_index].vendor == VENDOR_DLINK) {
+		u16 auxmode;
+		ret = read_mii_word(pegasus, 0, 0x1b, &auxmode);
+		if (ret < 0)
+			goto fail;
+		auxmode |= 4;
+		write_mii_word(pegasus, 0, 0x1b, &auxmode);
+	}
+
+	return ret;
+fail:
+	netif_dbg(pegasus, drv, pegasus->net, "%s failed\n", __func__);
+	return ret;
+}
+
+static void read_bulk_callback(struct urb *urb)
+{
+	pegasus_t *pegasus = urb->context;
+	struct net_device *net;
+	u8 *buf = urb->transfer_buffer;
+	int rx_status, count = urb->actual_length;
+	int status = urb->status;
+	__u16 pkt_len;
+
+	if (!pegasus)
+		return;
+
+	net = pegasus->net;
+	if (!netif_device_present(net) || !netif_running(net))
+		return;
+
+	switch (status) {
+	case 0:
+		break;
+	case -ETIME:
+		netif_dbg(pegasus, rx_err, net, "reset MAC\n");
+		pegasus->flags &= ~PEGASUS_RX_BUSY;
+		break;
+	case -EPIPE:		/* stall, or disconnect from TT */
+		/* FIXME schedule work to clear the halt */
+		netif_warn(pegasus, rx_err, net, "no rx stall recovery\n");
+		return;
+	case -ENOENT:
+	case -ECONNRESET:
+	case -ESHUTDOWN:
+		netif_dbg(pegasus, ifdown, net, "rx unlink, %d\n", status);
+		return;
+	default:
+		netif_dbg(pegasus, rx_err, net, "RX status %d\n", status);
+		goto goon;
+	}
+
+	if (count < 4)
+		goto goon;
+
+	rx_status = buf[count - 2];
+	if (rx_status & 0x1c) {
+		netif_dbg(pegasus, rx_err, net,
+			  "RX packet error %x\n", rx_status);
+		net->stats.rx_errors++;
+		if (rx_status & 0x04)	/* runt	*/
+			net->stats.rx_length_errors++;
+		if (rx_status & 0x08)
+			net->stats.rx_crc_errors++;
+		if (rx_status & 0x10)	/* extra bits	*/
+			net->stats.rx_frame_errors++;
+		goto goon;
+	}
+	if (pegasus->chip == 0x8513) {
+		pkt_len = le32_to_cpu(*(__le32 *)urb->transfer_buffer);
+		pkt_len &= 0x0fff;
+		pegasus->rx_skb->data += 2;
+	} else {
+		pkt_len = buf[count - 3] << 8;
+		pkt_len += buf[count - 4];
+		pkt_len &= 0xfff;
+		pkt_len -= 4;
+	}
+
+	/*
+	 * If the packet is unreasonably long, quietly drop it rather than
+	 * kernel panicing by calling skb_put.
+	 */
+	if (pkt_len > PEGASUS_MTU)
+		goto goon;
+
+	/*
+	 * at this point we are sure pegasus->rx_skb != NULL
+	 * so we go ahead and pass up the packet.
+	 */
+	skb_put(pegasus->rx_skb, pkt_len);
+	pegasus->rx_skb->protocol = eth_type_trans(pegasus->rx_skb, net);
+	netif_rx(pegasus->rx_skb);
+	net->stats.rx_packets++;
+	net->stats.rx_bytes += pkt_len;
+
+	if (pegasus->flags & PEGASUS_UNPLUG)
+		return;
+
+	pegasus->rx_skb = __netdev_alloc_skb_ip_align(pegasus->net, PEGASUS_MTU,
+						      GFP_ATOMIC);
+
+	if (pegasus->rx_skb == NULL)
+		goto tl_sched;
+goon:
+	usb_fill_bulk_urb(pegasus->rx_urb, pegasus->usb,
+			  usb_rcvbulkpipe(pegasus->usb, 1),
+			  pegasus->rx_skb->data, PEGASUS_MTU,
+			  read_bulk_callback, pegasus);
+	rx_status = usb_submit_urb(pegasus->rx_urb, GFP_ATOMIC);
+	if (rx_status == -ENODEV)
+		netif_device_detach(pegasus->net);
+	else if (rx_status) {
+		pegasus->flags |= PEGASUS_RX_URB_FAIL;
+		goto tl_sched;
+	} else {
+		pegasus->flags &= ~PEGASUS_RX_URB_FAIL;
+	}
+
+	return;
+
+tl_sched:
+	tasklet_schedule(&pegasus->rx_tl);
+}
+
+static void rx_fixup(struct tasklet_struct *t)
+{
+	pegasus_t *pegasus = from_tasklet(pegasus, t, rx_tl);
+	int status;
+
+	if (pegasus->flags & PEGASUS_UNPLUG)
+		return;
+
+	if (pegasus->flags & PEGASUS_RX_URB_FAIL)
+		if (pegasus->rx_skb)
+			goto try_again;
+	if (pegasus->rx_skb == NULL)
+		pegasus->rx_skb = __netdev_alloc_skb_ip_align(pegasus->net,
+							      PEGASUS_MTU,
+							      GFP_ATOMIC);
+	if (pegasus->rx_skb == NULL) {
+		netif_warn(pegasus, rx_err, pegasus->net, "low on memory\n");
+		tasklet_schedule(&pegasus->rx_tl);
+		return;
+	}
+	usb_fill_bulk_urb(pegasus->rx_urb, pegasus->usb,
+			  usb_rcvbulkpipe(pegasus->usb, 1),
+			  pegasus->rx_skb->data, PEGASUS_MTU,
+			  read_bulk_callback, pegasus);
+try_again:
+	status = usb_submit_urb(pegasus->rx_urb, GFP_ATOMIC);
+	if (status == -ENODEV)
+		netif_device_detach(pegasus->net);
+	else if (status) {
+		pegasus->flags |= PEGASUS_RX_URB_FAIL;
+		tasklet_schedule(&pegasus->rx_tl);
+	} else {
+		pegasus->flags &= ~PEGASUS_RX_URB_FAIL;
+	}
+}
+
+static void write_bulk_callback(struct urb *urb)
+{
+	pegasus_t *pegasus = urb->context;
+	struct net_device *net;
+	int status = urb->status;
+
+	if (!pegasus)
+		return;
+
+	net = pegasus->net;
+
+	if (!netif_device_present(net) || !netif_running(net))
+		return;
+
+	switch (status) {
+	case -EPIPE:
+		/* FIXME schedule_work() to clear the tx halt */
+		netif_stop_queue(net);
+		netif_warn(pegasus, tx_err, net, "no tx stall recovery\n");
+		return;
+	case -ENOENT:
+	case -ECONNRESET:
+	case -ESHUTDOWN:
+		netif_dbg(pegasus, ifdown, net, "tx unlink, %d\n", status);
+		return;
+	default:
+		netif_info(pegasus, tx_err, net, "TX status %d\n", status);
+		fallthrough;
+	case 0:
+		break;
+	}
+
+	netif_trans_update(net); /* prevent tx timeout */
+	netif_wake_queue(net);
+}
+
+static void intr_callback(struct urb *urb)
+{
+	pegasus_t *pegasus = urb->context;
+	struct net_device *net;
+	int res, status = urb->status;
+
+	if (!pegasus)
+		return;
+	net = pegasus->net;
+
+	switch (status) {
+	case 0:
+		break;
+	case -ECONNRESET:	/* unlink */
+	case -ENOENT:
+	case -ESHUTDOWN:
+		return;
+	default:
+		/* some Pegasus-I products report LOTS of data
+		 * toggle errors... avoid log spamming
+		 */
+		netif_dbg(pegasus, timer, net, "intr status %d\n", status);
+	}
+
+	if (urb->actual_length >= 6) {
+		u8 *d = urb->transfer_buffer;
+
+		/* byte 0 == tx_status1, reg 2B */
+		if (d[0] & (TX_UNDERRUN|EXCESSIVE_COL
+					|LATE_COL|JABBER_TIMEOUT)) {
+			net->stats.tx_errors++;
+			if (d[0] & TX_UNDERRUN)
+				net->stats.tx_fifo_errors++;
+			if (d[0] & (EXCESSIVE_COL | JABBER_TIMEOUT))
+				net->stats.tx_aborted_errors++;
+			if (d[0] & LATE_COL)
+				net->stats.tx_window_errors++;
+		}
+
+		/* d[5].LINK_STATUS lies on some adapters.
+		 * d[0].NO_CARRIER kicks in only with failed TX.
+		 * ... so monitoring with MII may be safest.
+		 */
+
+		/* bytes 3-4 == rx_lostpkt, reg 2E/2F */
+		net->stats.rx_missed_errors += ((d[3] & 0x7f) << 8) | d[4];
+	}
+
+	res = usb_submit_urb(urb, GFP_ATOMIC);
+	if (res == -ENODEV)
+		netif_device_detach(pegasus->net);
+	if (res)
+		netif_err(pegasus, timer, net,
+			  "can't resubmit interrupt urb, %d\n", res);
+}
+
+static void pegasus_tx_timeout(struct net_device *net, unsigned int txqueue)
+{
+	pegasus_t *pegasus = netdev_priv(net);
+	netif_warn(pegasus, timer, net, "tx timeout\n");
+	usb_unlink_urb(pegasus->tx_urb);
+	net->stats.tx_errors++;
+}
+
+static netdev_tx_t pegasus_start_xmit(struct sk_buff *skb,
+					    struct net_device *net)
+{
+	pegasus_t *pegasus = netdev_priv(net);
+	int count = ((skb->len + 2) & 0x3f) ? skb->len + 2 : skb->len + 3;
+	int res;
+	__u16 l16 = skb->len;
+
+	netif_stop_queue(net);
+
+	((__le16 *) pegasus->tx_buff)[0] = cpu_to_le16(l16);
+	skb_copy_from_linear_data(skb, pegasus->tx_buff + 2, skb->len);
+	usb_fill_bulk_urb(pegasus->tx_urb, pegasus->usb,
+			  usb_sndbulkpipe(pegasus->usb, 2),
+			  pegasus->tx_buff, count,
+			  write_bulk_callback, pegasus);
+	if ((res = usb_submit_urb(pegasus->tx_urb, GFP_ATOMIC))) {
+		netif_warn(pegasus, tx_err, net, "fail tx, %d\n", res);
+		switch (res) {
+		case -EPIPE:		/* stall, or disconnect from TT */
+			/* cleanup should already have been scheduled */
+			break;
+		case -ENODEV:		/* disconnect() upcoming */
+		case -EPERM:
+			netif_device_detach(pegasus->net);
+			break;
+		default:
+			net->stats.tx_errors++;
+			netif_start_queue(net);
+		}
+	} else {
+		net->stats.tx_packets++;
+		net->stats.tx_bytes += skb->len;
+	}
+	dev_kfree_skb(skb);
+
+	return NETDEV_TX_OK;
+}
+
+static inline void disable_net_traffic(pegasus_t *pegasus)
+{
+	__le16 tmp = cpu_to_le16(0);
+
+	set_registers(pegasus, EthCtrl0, sizeof(tmp), &tmp);
+}
+
+static inline int get_interrupt_interval(pegasus_t *pegasus)
+{
+	u16 data;
+	u8 interval;
+	int ret;
+
+	ret = read_eprom_word(pegasus, 4, &data);
+	if (ret < 0)
+		return ret;
+
+	interval = data >> 8;
+	if (pegasus->usb->speed != USB_SPEED_HIGH) {
+		if (interval < 0x80) {
+			netif_info(pegasus, timer, pegasus->net,
+				   "intr interval changed from %ums to %ums\n",
+				   interval, 0x80);
+			interval = 0x80;
+			data = (data & 0x00FF) | ((u16)interval << 8);
+#ifdef PEGASUS_WRITE_EEPROM
+			write_eprom_word(pegasus, 4, data);
+#endif
+		}
+	}
+	pegasus->intr_interval = interval;
+
+	return 0;
+}
+
+static void set_carrier(struct net_device *net)
+{
+	pegasus_t *pegasus = netdev_priv(net);
+	u16 tmp;
+
+	if (read_mii_word(pegasus, pegasus->phy, MII_BMSR, &tmp))
+		return;
+
+	if (tmp & BMSR_LSTATUS)
+		netif_carrier_on(net);
+	else
+		netif_carrier_off(net);
+}
+
+static void free_all_urbs(pegasus_t *pegasus)
+{
+	usb_free_urb(pegasus->intr_urb);
+	usb_free_urb(pegasus->tx_urb);
+	usb_free_urb(pegasus->rx_urb);
+}
+
+static void unlink_all_urbs(pegasus_t *pegasus)
+{
+	usb_kill_urb(pegasus->intr_urb);
+	usb_kill_urb(pegasus->tx_urb);
+	usb_kill_urb(pegasus->rx_urb);
+}
+
+static int alloc_urbs(pegasus_t *pegasus)
+{
+	int res = -ENOMEM;
+
+	pegasus->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
+	if (!pegasus->rx_urb) {
+		return res;
+	}
+	pegasus->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
+	if (!pegasus->tx_urb) {
+		usb_free_urb(pegasus->rx_urb);
+		return res;
+	}
+	pegasus->intr_urb = usb_alloc_urb(0, GFP_KERNEL);
+	if (!pegasus->intr_urb) {
+		usb_free_urb(pegasus->tx_urb);
+		usb_free_urb(pegasus->rx_urb);
+		return res;
+	}
+
+	return 0;
+}
+
+static int pegasus_open(struct net_device *net)
+{
+	pegasus_t *pegasus = netdev_priv(net);
+	int res=-ENOMEM;
+
+	if (pegasus->rx_skb == NULL)
+		pegasus->rx_skb = __netdev_alloc_skb_ip_align(pegasus->net,
+							      PEGASUS_MTU,
+							      GFP_KERNEL);
+	if (!pegasus->rx_skb)
+		goto exit;
+
+	set_registers(pegasus, EthID, 6, net->dev_addr);
+
+	usb_fill_bulk_urb(pegasus->rx_urb, pegasus->usb,
+			  usb_rcvbulkpipe(pegasus->usb, 1),
+			  pegasus->rx_skb->data, PEGASUS_MTU,
+			  read_bulk_callback, pegasus);
+	if ((res = usb_submit_urb(pegasus->rx_urb, GFP_KERNEL))) {
+		if (res == -ENODEV)
+			netif_device_detach(pegasus->net);
+		netif_dbg(pegasus, ifup, net, "failed rx_urb, %d\n", res);
+		goto exit;
+	}
+
+	usb_fill_int_urb(pegasus->intr_urb, pegasus->usb,
+			 usb_rcvintpipe(pegasus->usb, 3),
+			 pegasus->intr_buff, sizeof(pegasus->intr_buff),
+			 intr_callback, pegasus, pegasus->intr_interval);
+	if ((res = usb_submit_urb(pegasus->intr_urb, GFP_KERNEL))) {
+		if (res == -ENODEV)
+			netif_device_detach(pegasus->net);
+		netif_dbg(pegasus, ifup, net, "failed intr_urb, %d\n", res);
+		usb_kill_urb(pegasus->rx_urb);
+		goto exit;
+	}
+	res = enable_net_traffic(net, pegasus->usb);
+	if (res < 0) {
+		netif_dbg(pegasus, ifup, net,
+			  "can't enable_net_traffic() - %d\n", res);
+		res = -EIO;
+		usb_kill_urb(pegasus->rx_urb);
+		usb_kill_urb(pegasus->intr_urb);
+		goto exit;
+	}
+	set_carrier(net);
+	netif_start_queue(net);
+	netif_dbg(pegasus, ifup, net, "open\n");
+	res = 0;
+exit:
+	return res;
+}
+
+static int pegasus_close(struct net_device *net)
+{
+	pegasus_t *pegasus = netdev_priv(net);
+
+	netif_stop_queue(net);
+	if (!(pegasus->flags & PEGASUS_UNPLUG))
+		disable_net_traffic(pegasus);
+	tasklet_kill(&pegasus->rx_tl);
+	unlink_all_urbs(pegasus);
+
+	return 0;
+}
+
+static void pegasus_get_drvinfo(struct net_device *dev,
+				struct ethtool_drvinfo *info)
+{
+	pegasus_t *pegasus = netdev_priv(dev);
+
+	strscpy(info->driver, driver_name, sizeof(info->driver));
+	usb_make_path(pegasus->usb, info->bus_info, sizeof(info->bus_info));
+}
+
+/* also handles three patterns of some kind in hardware */
+#define	WOL_SUPPORTED	(WAKE_MAGIC|WAKE_PHY)
+
+static void
+pegasus_get_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
+{
+	pegasus_t	*pegasus = netdev_priv(dev);
+
+	wol->supported = WAKE_MAGIC | WAKE_PHY;
+	wol->wolopts = pegasus->wolopts;
+}
+
+static int
+pegasus_set_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
+{
+	pegasus_t	*pegasus = netdev_priv(dev);
+	u8		reg78 = 0x04;
+	int		ret;
+
+	if (wol->wolopts & ~WOL_SUPPORTED)
+		return -EINVAL;
+
+	if (wol->wolopts & WAKE_MAGIC)
+		reg78 |= 0x80;
+	if (wol->wolopts & WAKE_PHY)
+		reg78 |= 0x40;
+	/* FIXME this 0x10 bit still needs to get set in the chip... */
+	if (wol->wolopts)
+		pegasus->eth_regs[0] |= 0x10;
+	else
+		pegasus->eth_regs[0] &= ~0x10;
+	pegasus->wolopts = wol->wolopts;
+
+	ret = set_register(pegasus, WakeupControl, reg78);
+	if (!ret)
+		ret = device_set_wakeup_enable(&pegasus->usb->dev,
+						wol->wolopts);
+	return ret;
+}
+
+static inline void pegasus_reset_wol(struct net_device *dev)
+{
+	struct ethtool_wolinfo wol;
+
+	memset(&wol, 0, sizeof wol);
+	(void) pegasus_set_wol(dev, &wol);
+}
+
+static int
+pegasus_get_link_ksettings(struct net_device *dev,
+			   struct ethtool_link_ksettings *ecmd)
+{
+	pegasus_t *pegasus;
+
+	pegasus = netdev_priv(dev);
+	mii_ethtool_get_link_ksettings(&pegasus->mii, ecmd);
+	return 0;
+}
+
+static int
+pegasus_set_link_ksettings(struct net_device *dev,
+			   const struct ethtool_link_ksettings *ecmd)
+{
+	pegasus_t *pegasus = netdev_priv(dev);
+	return mii_ethtool_set_link_ksettings(&pegasus->mii, ecmd);
+}
+
+static int pegasus_nway_reset(struct net_device *dev)
+{
+	pegasus_t *pegasus = netdev_priv(dev);
+	return mii_nway_restart(&pegasus->mii);
+}
+
+static u32 pegasus_get_link(struct net_device *dev)
+{
+	pegasus_t *pegasus = netdev_priv(dev);
+	return mii_link_ok(&pegasus->mii);
+}
+
+static u32 pegasus_get_msglevel(struct net_device *dev)
+{
+	pegasus_t *pegasus = netdev_priv(dev);
+	return pegasus->msg_enable;
+}
+
+static void pegasus_set_msglevel(struct net_device *dev, u32 v)
+{
+	pegasus_t *pegasus = netdev_priv(dev);
+	pegasus->msg_enable = v;
+}
+
+static const struct ethtool_ops ops = {
+	.get_drvinfo = pegasus_get_drvinfo,
+	.nway_reset = pegasus_nway_reset,
+	.get_link = pegasus_get_link,
+	.get_msglevel = pegasus_get_msglevel,
+	.set_msglevel = pegasus_set_msglevel,
+	.get_wol = pegasus_get_wol,
+	.set_wol = pegasus_set_wol,
+	.get_link_ksettings = pegasus_get_link_ksettings,
+	.set_link_ksettings = pegasus_set_link_ksettings,
+};
+
+static int pegasus_siocdevprivate(struct net_device *net, struct ifreq *rq,
+				  void __user *udata, int cmd)
+{
+	__u16 *data = (__u16 *) &rq->ifr_ifru;
+	pegasus_t *pegasus = netdev_priv(net);
+	int res;
+
+	switch (cmd) {
+	case SIOCDEVPRIVATE:
+		data[0] = pegasus->phy;
+		fallthrough;
+	case SIOCDEVPRIVATE + 1:
+		res = read_mii_word(pegasus, data[0], data[1] & 0x1f, &data[3]);
+		break;
+	case SIOCDEVPRIVATE + 2:
+		if (!capable(CAP_NET_ADMIN))
+			return -EPERM;
+		write_mii_word(pegasus, pegasus->phy, data[1] & 0x1f, &data[2]);
+		res = 0;
+		break;
+	default:
+		res = -EOPNOTSUPP;
+	}
+	return res;
+}
+
+static void pegasus_set_multicast(struct net_device *net)
+{
+	pegasus_t *pegasus = netdev_priv(net);
+
+	if (net->flags & IFF_PROMISC) {
+		pegasus->eth_regs[EthCtrl2] |= RX_PROMISCUOUS;
+		netif_info(pegasus, link, net, "Promiscuous mode enabled\n");
+	} else if (!netdev_mc_empty(net) || (net->flags & IFF_ALLMULTI)) {
+		pegasus->eth_regs[EthCtrl0] |= RX_MULTICAST;
+		pegasus->eth_regs[EthCtrl2] &= ~RX_PROMISCUOUS;
+		netif_dbg(pegasus, link, net, "set allmulti\n");
+	} else {
+		pegasus->eth_regs[EthCtrl0] &= ~RX_MULTICAST;
+		pegasus->eth_regs[EthCtrl2] &= ~RX_PROMISCUOUS;
+	}
+	update_eth_regs_async(pegasus);
+}
+
+static __u8 mii_phy_probe(pegasus_t *pegasus)
+{
+	int i, ret;
+	__u16 tmp;
+
+	for (i = 0; i < 32; i++) {
+		ret = read_mii_word(pegasus, i, MII_BMSR, &tmp);
+		if (ret < 0)
+			goto fail;
+		if (tmp == 0 || tmp == 0xffff || (tmp & BMSR_MEDIA) == 0)
+			continue;
+		else
+			return i;
+	}
+fail:
+	return 0xff;
+}
+
+static inline void setup_pegasus_II(pegasus_t *pegasus)
+{
+	int ret;
+	__u8 data = 0xa5;
+
+	set_register(pegasus, Reg1d, 0);
+	set_register(pegasus, Reg7b, 1);
+	msleep(100);
+	if ((pegasus->features & HAS_HOME_PNA) && mii_mode)
+		set_register(pegasus, Reg7b, 0);
+	else
+		set_register(pegasus, Reg7b, 2);
+
+	set_register(pegasus, 0x83, data);
+	ret = get_registers(pegasus, 0x83, 1, &data);
+	if (ret < 0)
+		goto fail;
+
+	if (data == 0xa5)
+		pegasus->chip = 0x8513;
+	else
+		pegasus->chip = 0;
+
+	set_register(pegasus, 0x80, 0xc0);
+	set_register(pegasus, 0x83, 0xff);
+	set_register(pegasus, 0x84, 0x01);
+
+	if (pegasus->features & HAS_HOME_PNA && mii_mode)
+		set_register(pegasus, Reg81, 6);
+	else
+		set_register(pegasus, Reg81, 2);
+
+	return;
+fail:
+	netif_dbg(pegasus, drv, pegasus->net, "%s failed\n", __func__);
+}
+
+static void check_carrier(struct work_struct *work)
+{
+	pegasus_t *pegasus = container_of(work, pegasus_t, carrier_check.work);
+	set_carrier(pegasus->net);
+	if (!(pegasus->flags & PEGASUS_UNPLUG)) {
+		queue_delayed_work(system_long_wq, &pegasus->carrier_check,
+			CARRIER_CHECK_DELAY);
+	}
+}
+
+static int pegasus_blacklisted(struct usb_device *udev)
+{
+	struct usb_device_descriptor *udd = &udev->descriptor;
+
+	/* Special quirk to keep the driver from handling the Belkin Bluetooth
+	 * dongle which happens to have the same ID.
+	 */
+	if ((udd->idVendor == cpu_to_le16(VENDOR_BELKIN)) &&
+	    (udd->idProduct == cpu_to_le16(0x0121)) &&
+	    (udd->bDeviceClass == USB_CLASS_WIRELESS_CONTROLLER) &&
+	    (udd->bDeviceProtocol == 1))
+		return 1;
+
+	return 0;
+}
+
+static int pegasus_probe(struct usb_interface *intf,
+			 const struct usb_device_id *id)
+{
+	struct usb_device *dev = interface_to_usbdev(intf);
+	struct net_device *net;
+	pegasus_t *pegasus;
+	int dev_index = id - pegasus_ids;
+	int res = -ENOMEM;
+
+	if (pegasus_blacklisted(dev))
+		return -ENODEV;
+
+	net = alloc_etherdev(sizeof(struct pegasus));
+	if (!net)
+		goto out;
+
+	pegasus = netdev_priv(net);
+	pegasus->dev_index = dev_index;
+
+	res = alloc_urbs(pegasus);
+	if (res < 0) {
+		dev_err(&intf->dev, "can't allocate %s\n", "urbs");
+		goto out1;
+	}
+
+	tasklet_setup(&pegasus->rx_tl, rx_fixup);
+
+	INIT_DELAYED_WORK(&pegasus->carrier_check, check_carrier);
+
+	pegasus->intf = intf;
+	pegasus->usb = dev;
+	pegasus->net = net;
+
+
+	net->watchdog_timeo = PEGASUS_TX_TIMEOUT;
+	net->netdev_ops = &pegasus_netdev_ops;
+	net->ethtool_ops = &ops;
+	pegasus->mii.dev = net;
+	pegasus->mii.mdio_read = mdio_read;
+	pegasus->mii.mdio_write = mdio_write;
+	pegasus->mii.phy_id_mask = 0x1f;
+	pegasus->mii.reg_num_mask = 0x1f;
+	pegasus->msg_enable = netif_msg_init(msg_level, NETIF_MSG_DRV
+				| NETIF_MSG_PROBE | NETIF_MSG_LINK);
+
+	pegasus->features = usb_dev_id[dev_index].private;
+	res = get_interrupt_interval(pegasus);
+	if (res)
+		goto out2;
+	if (reset_mac(pegasus)) {
+		dev_err(&intf->dev, "can't reset MAC\n");
+		res = -EIO;
+		goto out2;
+	}
+	set_ethernet_addr(pegasus);
+	if (pegasus->features & PEGASUS_II) {
+		dev_info(&intf->dev, "setup Pegasus II specific registers\n");
+		setup_pegasus_II(pegasus);
+	}
+	pegasus->phy = mii_phy_probe(pegasus);
+	if (pegasus->phy == 0xff) {
+		dev_warn(&intf->dev, "can't locate MII phy, using default\n");
+		pegasus->phy = 1;
+	}
+	pegasus->mii.phy_id = pegasus->phy;
+	usb_set_intfdata(intf, pegasus);
+	SET_NETDEV_DEV(net, &intf->dev);
+	pegasus_reset_wol(net);
+	res = register_netdev(net);
+	if (res)
+		goto out3;
+	queue_delayed_work(system_long_wq, &pegasus->carrier_check,
+			   CARRIER_CHECK_DELAY);
+	dev_info(&intf->dev, "%s, %s, %pM\n", net->name,
+		 usb_dev_id[dev_index].name, net->dev_addr);
+	return 0;
+
+out3:
+	usb_set_intfdata(intf, NULL);
+out2:
+	free_all_urbs(pegasus);
+out1:
+	free_netdev(net);
+out:
+	return res;
+}
+
+static void pegasus_disconnect(struct usb_interface *intf)
+{
+	struct pegasus *pegasus = usb_get_intfdata(intf);
+
+	usb_set_intfdata(intf, NULL);
+	if (!pegasus) {
+		dev_dbg(&intf->dev, "unregistering non-bound device?\n");
+		return;
+	}
+
+	pegasus->flags |= PEGASUS_UNPLUG;
+	cancel_delayed_work_sync(&pegasus->carrier_check);
+	unregister_netdev(pegasus->net);
+	unlink_all_urbs(pegasus);
+	free_all_urbs(pegasus);
+	if (pegasus->rx_skb != NULL) {
+		dev_kfree_skb(pegasus->rx_skb);
+		pegasus->rx_skb = NULL;
+	}
+	free_netdev(pegasus->net);
+}
+
+static int pegasus_suspend(struct usb_interface *intf, pm_message_t message)
+{
+	struct pegasus *pegasus = usb_get_intfdata(intf);
+
+	netif_device_detach(pegasus->net);
+	cancel_delayed_work_sync(&pegasus->carrier_check);
+	if (netif_running(pegasus->net)) {
+		usb_kill_urb(pegasus->rx_urb);
+		usb_kill_urb(pegasus->intr_urb);
+	}
+	return 0;
+}
+
+static int pegasus_resume(struct usb_interface *intf)
+{
+	struct pegasus *pegasus = usb_get_intfdata(intf);
+
+	netif_device_attach(pegasus->net);
+	if (netif_running(pegasus->net)) {
+		pegasus->rx_urb->status = 0;
+		pegasus->rx_urb->actual_length = 0;
+		read_bulk_callback(pegasus->rx_urb);
+
+		pegasus->intr_urb->status = 0;
+		pegasus->intr_urb->actual_length = 0;
+		intr_callback(pegasus->intr_urb);
+	}
+	queue_delayed_work(system_long_wq, &pegasus->carrier_check,
+				CARRIER_CHECK_DELAY);
+	return 0;
+}
+
+static const struct net_device_ops pegasus_netdev_ops = {
+	.ndo_open =			pegasus_open,
+	.ndo_stop =			pegasus_close,
+	.ndo_siocdevprivate =		pegasus_siocdevprivate,
+	.ndo_start_xmit =		pegasus_start_xmit,
+	.ndo_set_rx_mode =		pegasus_set_multicast,
+	.ndo_tx_timeout =		pegasus_tx_timeout,
+	.ndo_set_mac_address =		eth_mac_addr,
+	.ndo_validate_addr =		eth_validate_addr,
+};
+
+static struct usb_driver pegasus_driver = {
+	.name = driver_name,
+	.probe = pegasus_probe,
+	.disconnect = pegasus_disconnect,
+	.id_table = pegasus_ids,
+	.suspend = pegasus_suspend,
+	.resume = pegasus_resume,
+	.disable_hub_initiated_lpm = 1,
+};
+
+static void __init parse_id(char *id)
+{
+	unsigned int vendor_id = 0, device_id = 0, flags = 0, i = 0;
+	char *token, *name = NULL;
+
+	if ((token = strsep(&id, ":")) != NULL)
+		name = token;
+	/* name now points to a null terminated string*/
+	if ((token = strsep(&id, ":")) != NULL)
+		vendor_id = simple_strtoul(token, NULL, 16);
+	if ((token = strsep(&id, ":")) != NULL)
+		device_id = simple_strtoul(token, NULL, 16);
+	flags = simple_strtoul(id, NULL, 16);
+	pr_info("%s: new device %s, vendor ID 0x%04x, device ID 0x%04x, flags: 0x%x\n",
+		driver_name, name, vendor_id, device_id, flags);
+
+	if (vendor_id > 0x10000 || vendor_id == 0)
+		return;
+	if (device_id > 0x10000 || device_id == 0)
+		return;
+
+	for (i = 0; usb_dev_id[i].name; i++);
+	usb_dev_id[i].name = name;
+	usb_dev_id[i].vendor = vendor_id;
+	usb_dev_id[i].device = device_id;
+	usb_dev_id[i].private = flags;
+	pegasus_ids[i].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
+	pegasus_ids[i].idVendor = vendor_id;
+	pegasus_ids[i].idProduct = device_id;
+}
+
+static int __init pegasus_init(void)
+{
+	pr_info("%s: " DRIVER_DESC "\n", driver_name);
+	if (devid)
+		parse_id(devid);
+	return usb_register(&pegasus_driver);
+}
+
+static void __exit pegasus_exit(void)
+{
+	usb_deregister(&pegasus_driver);
+}
+
+module_init(pegasus_init);
+module_exit(pegasus_exit);