Merge branch 'usb-move' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/netdev-2.6

* 'usb-move' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/netdev-2.6:
  Move USB network drivers to drivers/net/usb.

1 files changed, 1504 insertions, 0 deletions

diff --git a/drivers/net/usb/pegasus.c b/drivers/net/usb/pegasus.c
new file mode 100644
index 00000000000..a05fd97e5bc
--- /dev/null
+++ b/drivers/net/usb/pegasus.c
@@ -0,0 +1,1504 @@
+/*
+ *  Copyright (c) 1999-2005 Petko Manolov (petkan@users.sourceforge.net)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ *	ChangeLog:
+ *		....	Most of the time spent on reading sources & docs.
+ *		v0.2.x	First official release for the Linux kernel.
+ *		v0.3.0	Beutified and structured, some bugs fixed.
+ *		v0.3.x	URBifying bulk requests and bugfixing. First relatively
+ *			stable release. Still can touch device's registers only
+ *			from top-halves.
+ *		v0.4.0	Control messages remained unurbified are now URBs.
+ *			Now we can touch the HW at any time.
+ *		v0.4.9	Control urbs again use process context to wait. Argh...
+ *			Some long standing bugs (enable_net_traffic) fixed.
+ *			Also nasty trick about resubmiting control urb from
+ *			interrupt context used. Please let me know how it
+ *			behaves. Pegasus II support added since this version.
+ *			TODO: suppressing HCD warnings spewage on disconnect.
+ *		v0.4.13	Ethernet address is now set at probe(), not at open()
+ *			time as this seems to break dhcpd. 
+ *		v0.5.0	branch to 2.5.x kernels
+ *		v0.5.1	ethtool support added
+ *		v0.5.5	rx socket buffers are in a pool and the their allocation
+ * 			is out of the interrupt routine.
+ */
+
+#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 <asm/uaccess.h>
+#include "pegasus.h"
+
+/*
+ * Version Information
+ */
+#define DRIVER_VERSION "v0.6.14 (2006/09/27)"
+#define DRIVER_AUTHOR "Petko Manolov <petkan@users.sourceforge.net>"
+#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)
+
+static int loopback = 0;
+static int mii_mode = 0;
+static char *devid=NULL;
+
+static struct usb_eth_dev usb_dev_id[] = {
+#define	PEGASUS_DEV(pn, vid, pid, flags)	\
+	{.name = pn, .vendor = vid, .device = pid, .private = flags},
+#include "pegasus.h"
+#undef	PEGASUS_DEV
+	{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},
+#include "pegasus.h"
+#undef	PEGASUS_DEV
+	{},
+	{}
+};
+
+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 int update_eth_regs_async(pegasus_t *);
+/* Aargh!!! I _really_ hate such tweaks */
+static void ctrl_callback(struct urb *urb)
+{
+	pegasus_t *pegasus = urb->context;
+
+	if (!pegasus)
+		return;
+
+	switch (urb->status) {
+	case 0:
+		if (pegasus->flags & ETH_REGS_CHANGE) {
+			pegasus->flags &= ~ETH_REGS_CHANGE;
+			pegasus->flags |= ETH_REGS_CHANGED;
+			update_eth_regs_async(pegasus);
+			return;
+		}
+		break;
+	case -EINPROGRESS:
+		return;
+	case -ENOENT:
+		break;
+	default:
+		if (netif_msg_drv(pegasus))
+			dev_dbg(&pegasus->intf->dev, "%s, status %d\n",
+				__FUNCTION__, urb->status);
+	}
+	pegasus->flags &= ~ETH_REGS_CHANGED;
+	wake_up(&pegasus->ctrl_wait);
+}
+
+static int get_registers(pegasus_t * pegasus, __u16 indx, __u16 size,
+			 void *data)
+{
+	int ret;
+	char *buffer;
+	DECLARE_WAITQUEUE(wait, current);
+
+	buffer = kmalloc(size, GFP_KERNEL);
+	if (!buffer) {
+		if (netif_msg_drv(pegasus))
+			dev_warn(&pegasus->intf->dev, "out of memory in %s\n",
+					__FUNCTION__);
+		return -ENOMEM;
+	}
+	add_wait_queue(&pegasus->ctrl_wait, &wait);
+	set_current_state(TASK_UNINTERRUPTIBLE);
+	while (pegasus->flags & ETH_REGS_CHANGED)
+		schedule();
+	remove_wait_queue(&pegasus->ctrl_wait, &wait);
+	set_current_state(TASK_RUNNING);
+
+	pegasus->dr.bRequestType = PEGASUS_REQT_READ;
+	pegasus->dr.bRequest = PEGASUS_REQ_GET_REGS;
+	pegasus->dr.wValue = cpu_to_le16(0);
+	pegasus->dr.wIndex = cpu_to_le16p(&indx);
+	pegasus->dr.wLength = cpu_to_le16p(&size);
+	pegasus->ctrl_urb->transfer_buffer_length = size;
+
+	usb_fill_control_urb(pegasus->ctrl_urb, pegasus->usb,
+			     usb_rcvctrlpipe(pegasus->usb, 0),
+			     (char *) &pegasus->dr,
+			     buffer, size, ctrl_callback, pegasus);
+
+	add_wait_queue(&pegasus->ctrl_wait, &wait);
+	set_current_state(TASK_UNINTERRUPTIBLE);
+
+	/* using ATOMIC, we'd never wake up if we slept */
+	if ((ret = usb_submit_urb(pegasus->ctrl_urb, GFP_ATOMIC))) {
+		set_current_state(TASK_RUNNING);
+		if (ret == -ENODEV)
+			netif_device_detach(pegasus->net);
+		if (netif_msg_drv(pegasus))
+			dev_err(&pegasus->intf->dev, "%s, status %d\n",
+					__FUNCTION__, ret);
+		goto out;
+	}
+
+	schedule();
+out:
+	remove_wait_queue(&pegasus->ctrl_wait, &wait);
+	memcpy(data, buffer, size);
+	kfree(buffer);
+
+	return ret;
+}
+
+static int set_registers(pegasus_t * pegasus, __u16 indx, __u16 size,
+			 void *data)
+{
+	int ret;
+	char *buffer;
+	DECLARE_WAITQUEUE(wait, current);
+
+	buffer = kmalloc(size, GFP_KERNEL);
+	if (!buffer) {
+		if (netif_msg_drv(pegasus))
+			dev_warn(&pegasus->intf->dev, "out of memory in %s\n",
+					__FUNCTION__);
+		return -ENOMEM;
+	}
+	memcpy(buffer, data, size);
+
+	add_wait_queue(&pegasus->ctrl_wait, &wait);
+	set_current_state(TASK_UNINTERRUPTIBLE);
+	while (pegasus->flags & ETH_REGS_CHANGED)
+		schedule();
+	remove_wait_queue(&pegasus->ctrl_wait, &wait);
+	set_current_state(TASK_RUNNING);
+
+	pegasus->dr.bRequestType = PEGASUS_REQT_WRITE;
+	pegasus->dr.bRequest = PEGASUS_REQ_SET_REGS;
+	pegasus->dr.wValue = cpu_to_le16(0);
+	pegasus->dr.wIndex = cpu_to_le16p(&indx);
+	pegasus->dr.wLength = cpu_to_le16p(&size);
+	pegasus->ctrl_urb->transfer_buffer_length = size;
+
+	usb_fill_control_urb(pegasus->ctrl_urb, pegasus->usb,
+			     usb_sndctrlpipe(pegasus->usb, 0),
+			     (char *) &pegasus->dr,
+			     buffer, size, ctrl_callback, pegasus);
+
+	add_wait_queue(&pegasus->ctrl_wait, &wait);
+	set_current_state(TASK_UNINTERRUPTIBLE);
+
+	if ((ret = usb_submit_urb(pegasus->ctrl_urb, GFP_ATOMIC))) {
+		if (ret == -ENODEV)
+			netif_device_detach(pegasus->net);
+		if (netif_msg_drv(pegasus))
+			dev_err(&pegasus->intf->dev, "%s, status %d\n",
+					__FUNCTION__, ret);
+		goto out;
+	}
+
+	schedule();
+out:
+	remove_wait_queue(&pegasus->ctrl_wait, &wait);
+	kfree(buffer);
+
+	return ret;
+}
+
+static int set_register(pegasus_t * pegasus, __u16 indx, __u8 data)
+{
+	int ret;
+	char *tmp;
+	DECLARE_WAITQUEUE(wait, current);
+
+	tmp = kmalloc(1, GFP_KERNEL);
+	if (!tmp) {
+		if (netif_msg_drv(pegasus))
+			dev_warn(&pegasus->intf->dev, "out of memory in %s\n",
+					__FUNCTION__);
+		return -ENOMEM;
+	}
+	memcpy(tmp, &data, 1);
+	add_wait_queue(&pegasus->ctrl_wait, &wait);
+	set_current_state(TASK_UNINTERRUPTIBLE);
+	while (pegasus->flags & ETH_REGS_CHANGED)
+		schedule();
+	remove_wait_queue(&pegasus->ctrl_wait, &wait);
+	set_current_state(TASK_RUNNING);
+
+	pegasus->dr.bRequestType = PEGASUS_REQT_WRITE;
+	pegasus->dr.bRequest = PEGASUS_REQ_SET_REG;
+	pegasus->dr.wValue = cpu_to_le16(data);
+	pegasus->dr.wIndex = cpu_to_le16p(&indx);
+	pegasus->dr.wLength = cpu_to_le16(1);
+	pegasus->ctrl_urb->transfer_buffer_length = 1;
+
+	usb_fill_control_urb(pegasus->ctrl_urb, pegasus->usb,
+			     usb_sndctrlpipe(pegasus->usb, 0),
+			     (char *) &pegasus->dr,
+			     tmp, 1, ctrl_callback, pegasus);
+
+	add_wait_queue(&pegasus->ctrl_wait, &wait);
+	set_current_state(TASK_UNINTERRUPTIBLE);
+
+	if ((ret = usb_submit_urb(pegasus->ctrl_urb, GFP_ATOMIC))) {
+		if (ret == -ENODEV)
+			netif_device_detach(pegasus->net);
+		if (netif_msg_drv(pegasus))
+			dev_err(&pegasus->intf->dev, "%s, status %d\n",
+					__FUNCTION__, ret);
+		goto out;
+	}
+
+	schedule();
+out:
+	remove_wait_queue(&pegasus->ctrl_wait, &wait);
+	kfree(tmp);
+
+	return ret;
+}
+
+static int update_eth_regs_async(pegasus_t * pegasus)
+{
+	int ret;
+
+	pegasus->dr.bRequestType = PEGASUS_REQT_WRITE;
+	pegasus->dr.bRequest = PEGASUS_REQ_SET_REGS;
+	pegasus->dr.wValue = 0;
+	pegasus->dr.wIndex = cpu_to_le16(EthCtrl0);
+	pegasus->dr.wLength = cpu_to_le16(3);
+	pegasus->ctrl_urb->transfer_buffer_length = 3;
+
+	usb_fill_control_urb(pegasus->ctrl_urb, pegasus->usb,
+			     usb_sndctrlpipe(pegasus->usb, 0),
+			     (char *) &pegasus->dr,
+			     pegasus->eth_regs, 3, ctrl_callback, pegasus);
+
+	if ((ret = usb_submit_urb(pegasus->ctrl_urb, GFP_ATOMIC))) {
+		if (ret == -ENODEV)
+			netif_device_detach(pegasus->net);
+		if (netif_msg_drv(pegasus))
+			dev_err(&pegasus->intf->dev, "%s, status %d\n",
+					__FUNCTION__, ret);
+	}
+
+	return ret;
+}
+
+/* Returns 0 on success, error on failure */
+static int read_mii_word(pegasus_t * pegasus, __u8 phy, __u8 indx, __u16 * regd)
+{
+	int i;
+	__u8 data[4] = { phy, 0, 0, indx };
+	__le16 regdi;
+	int ret;
+
+	set_register(pegasus, PhyCtrl, 0);
+	set_registers(pegasus, PhyAddr, sizeof (data), data);
+	set_register(pegasus, PhyCtrl, (indx | PHY_READ));
+	for (i = 0; i < REG_TIMEOUT; i++) {
+		ret = get_registers(pegasus, PhyCtrl, 1, data);
+		if (ret == -ESHUTDOWN)
+			goto fail;
+		if (data[0] & PHY_DONE)
+			break;
+	}
+	if (i < REG_TIMEOUT) {
+		ret = get_registers(pegasus, PhyData, 2, &regdi);
+		*regd = le16_to_cpu(regdi);
+		return ret;
+	}
+fail:
+	if (netif_msg_drv(pegasus))
+		dev_warn(&pegasus->intf->dev, "%s failed\n", __FUNCTION__);
+
+	return ret;
+}
+
+static int mdio_read(struct net_device *dev, int phy_id, int loc)
+{
+	pegasus_t *pegasus = (pegasus_t *) netdev_priv(dev);
+	u16 res;
+
+	read_mii_word(pegasus, phy_id, loc, &res);
+	return (int)res;
+}
+
+static int write_mii_word(pegasus_t * pegasus, __u8 phy, __u8 indx, __u16 regd)
+{
+	int i;
+	__u8 data[4] = { phy, 0, 0, indx };
+	int ret;
+
+	data[1] = (u8) regd;
+	data[2] = (u8) (regd >> 8);
+	set_register(pegasus, PhyCtrl, 0);
+	set_registers(pegasus, PhyAddr, sizeof(data), data);
+	set_register(pegasus, PhyCtrl, (indx | PHY_WRITE));
+	for (i = 0; i < REG_TIMEOUT; i++) {
+		ret = get_registers(pegasus, PhyCtrl, 1, data);
+		if (ret == -ESHUTDOWN)
+			goto fail;
+		if (data[0] & PHY_DONE)
+			break;
+	}
+	if (i < REG_TIMEOUT)
+		return ret;
+
+fail:
+	if (netif_msg_drv(pegasus))
+		dev_warn(&pegasus->intf->dev, "%s failed\n", __FUNCTION__);
+	return -ETIMEDOUT;
+}
+
+static void mdio_write(struct net_device *dev, int phy_id, int loc, int val)
+{
+	pegasus_t *pegasus = (pegasus_t *) netdev_priv(dev);
+
+	write_mii_word(pegasus, phy_id, loc, val);
+}
+
+static int read_eprom_word(pegasus_t * pegasus, __u8 index, __u16 * retdata)
+{
+	int i;
+	__u8 tmp;
+	__le16 retdatai;
+	int ret;
+
+	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 (tmp & EPROM_DONE)
+			break;
+		if (ret == -ESHUTDOWN)
+			goto fail;
+	}
+	if (i < REG_TIMEOUT) {
+		ret = get_registers(pegasus, EpromData, 2, &retdatai);
+		*retdata = le16_to_cpu(retdatai);
+		return ret;
+	}
+
+fail:
+	if (netif_msg_drv(pegasus))
+		dev_warn(&pegasus->intf->dev, "%s failed\n", __FUNCTION__);
+	return -ETIMEDOUT;
+}
+
+#ifdef	PEGASUS_WRITE_EEPROM
+static inline void enable_eprom_write(pegasus_t * pegasus)
+{
+	__u8 tmp;
+	int ret;
+
+	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;
+	int ret;
+
+	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;
+
+	set_registers(pegasus, EpromOffset, 4, d);
+	enable_eprom_write(pegasus);
+	set_register(pegasus, EpromOffset, index);
+	set_registers(pegasus, EpromData, 2, &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)
+		return ret;
+fail:
+	if (netif_msg_drv(pegasus))
+		dev_warn(&pegasus->intf->dev, "%s failed\n", __FUNCTION__);
+	return -ETIMEDOUT;
+}
+#endif				/* PEGASUS_WRITE_EEPROM */
+
+static inline void get_node_id(pegasus_t * pegasus, __u8 * id)
+{
+	int i;
+	__u16 w16;
+
+	for (i = 0; i < 3; i++) {
+		read_eprom_word(pegasus, i, &w16);
+		((__le16 *) id)[i] = cpu_to_le16p(&w16);
+	}
+}
+
+static void set_ethernet_addr(pegasus_t * pegasus)
+{
+	__u8 node_id[6];
+
+	if (pegasus->features & PEGASUS_II) {
+		get_registers(pegasus, 0x10, sizeof(node_id), node_id);
+	} else {
+		get_node_id(pegasus, node_id);
+		set_registers(pegasus, EthID, sizeof (node_id), node_id);
+	}
+	memcpy(pegasus->net->dev_addr, node_id, sizeof (node_id));
+}
+
+static inline int reset_mac(pegasus_t * pegasus)
+{
+	__u8 data = 0x8;
+	int i;
+
+	set_register(pegasus, EthCtrl1, data);
+	for (i = 0; i < REG_TIMEOUT; i++) {
+		get_registers(pegasus, EthCtrl1, 1, &data);
+		if (~data & 0x08) {
+			if (loopback & 1)
+				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;
+		read_mii_word(pegasus, 3, 0x1b, &auxmode);
+		write_mii_word(pegasus, 3, 0x1b, auxmode | 4);
+	}
+
+	return 0;
+}
+
+static int enable_net_traffic(struct net_device *dev, struct usb_device *usb)
+{
+	__u16 linkpart;
+	__u8 data[4];
+	pegasus_t *pegasus = netdev_priv(dev);
+	int ret;
+
+	read_mii_word(pegasus, pegasus->phy, MII_LPA, &linkpart);
+	data[0] = 0xc9;
+	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 & 1) ? 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;
+		read_mii_word(pegasus, 0, 0x1b, &auxmode);
+		write_mii_word(pegasus, 0, 0x1b, auxmode | 4);
+	}
+
+	return ret;
+}
+
+static void fill_skb_pool(pegasus_t * pegasus)
+{
+	int i;
+
+	for (i = 0; i < RX_SKBS; i++) {
+		if (pegasus->rx_pool[i])
+			continue;
+		pegasus->rx_pool[i] = dev_alloc_skb(PEGASUS_MTU + 2);
+		/*
+		 ** we give up if the allocation fail. the tasklet will be
+		 ** rescheduled again anyway...
+		 */
+		if (pegasus->rx_pool[i] == NULL)
+			return;
+		skb_reserve(pegasus->rx_pool[i], 2);
+	}
+}
+
+static void free_skb_pool(pegasus_t * pegasus)
+{
+	int i;
+
+	for (i = 0; i < RX_SKBS; i++) {
+		if (pegasus->rx_pool[i]) {
+			dev_kfree_skb(pegasus->rx_pool[i]);
+			pegasus->rx_pool[i] = NULL;
+		}
+	}
+}
+
+static inline struct sk_buff *pull_skb(pegasus_t * pegasus)
+{
+	int i;
+	struct sk_buff *skb;
+
+	for (i = 0; i < RX_SKBS; i++) {
+		if (likely(pegasus->rx_pool[i] != NULL)) {
+			skb = pegasus->rx_pool[i];
+			pegasus->rx_pool[i] = NULL;
+			return skb;
+		}
+	}
+	return NULL;
+}
+
+static void read_bulk_callback(struct urb *urb)
+{
+	pegasus_t *pegasus = urb->context;
+	struct net_device *net;
+	int rx_status, count = urb->actual_length;
+	u8 *buf = urb->transfer_buffer;
+	__u16 pkt_len;
+
+	if (!pegasus)
+		return;
+
+	net = pegasus->net;
+	if (!netif_device_present(net) || !netif_running(net))
+		return;
+
+	switch (urb->status) {
+	case 0:
+		break;
+	case -ETIME:
+		if (netif_msg_rx_err(pegasus))
+			pr_debug("%s: reset MAC\n", net->name);
+		pegasus->flags &= ~PEGASUS_RX_BUSY;
+		break;
+	case -EPIPE:		/* stall, or disconnect from TT */
+		/* FIXME schedule work to clear the halt */
+		if (netif_msg_rx_err(pegasus))
+			printk(KERN_WARNING "%s: no rx stall recovery\n",
+					net->name);
+		return;
+	case -ENOENT:
+	case -ECONNRESET:
+	case -ESHUTDOWN:
+		if (netif_msg_ifdown(pegasus))
+			pr_debug("%s: rx unlink, %d\n", net->name, urb->status);
+		return;
+	default:
+		if (netif_msg_rx_err(pegasus))
+			pr_debug("%s: RX status %d\n", net->name, urb->status);
+		goto goon;
+	}
+
+	if (!count || count < 4)
+		goto goon;
+
+	rx_status = buf[count - 2];
+	if (rx_status & 0x1e) {
+		if (netif_msg_rx_err(pegasus))
+			pr_debug("%s: RX packet error %x\n",
+					net->name, rx_status);
+		pegasus->stats.rx_errors++;
+		if (rx_status & 0x06)	// long or runt
+			pegasus->stats.rx_length_errors++;
+		if (rx_status & 0x08)
+			pegasus->stats.rx_crc_errors++;
+		if (rx_status & 0x10)	// extra bits
+			pegasus->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 -= 8;
+	}
+
+	/*
+	 * 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);
+	pegasus->stats.rx_packets++;
+	pegasus->stats.rx_bytes += pkt_len;
+
+	if (pegasus->flags & PEGASUS_UNPLUG)
+		return;
+
+	spin_lock(&pegasus->rx_pool_lock);
+	pegasus->rx_skb = pull_skb(pegasus);
+	spin_unlock(&pegasus->rx_pool_lock);
+
+	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 + 8,
+			  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(unsigned long data)
+{
+	pegasus_t *pegasus;
+	unsigned long flags;
+	int status;
+
+	pegasus = (pegasus_t *) data;
+	if (pegasus->flags & PEGASUS_UNPLUG)
+		return;
+
+	spin_lock_irqsave(&pegasus->rx_pool_lock, flags);
+	fill_skb_pool(pegasus);
+	if (pegasus->flags & PEGASUS_RX_URB_FAIL)
+		if (pegasus->rx_skb)
+			goto try_again;
+	if (pegasus->rx_skb == NULL) {
+		pegasus->rx_skb = pull_skb(pegasus);
+	}
+	if (pegasus->rx_skb == NULL) {
+		if (netif_msg_rx_err(pegasus))
+			printk(KERN_WARNING "%s: low on memory\n",
+					pegasus->net->name);
+		tasklet_schedule(&pegasus->rx_tl);
+		goto done;
+	}
+	usb_fill_bulk_urb(pegasus->rx_urb, pegasus->usb,
+			  usb_rcvbulkpipe(pegasus->usb, 1),
+			  pegasus->rx_skb->data, PEGASUS_MTU + 8,
+			  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;
+	}
+done:
+	spin_unlock_irqrestore(&pegasus->rx_pool_lock, flags);
+}
+
+static void write_bulk_callback(struct urb *urb)
+{
+	pegasus_t *pegasus = urb->context;
+	struct net_device *net = pegasus->net;
+
+	if (!pegasus)
+		return;
+
+	if (!netif_device_present(net) || !netif_running(net))
+		return;
+
+	switch (urb->status) {
+	case -EPIPE:
+		/* FIXME schedule_work() to clear the tx halt */
+		netif_stop_queue(net);
+		if (netif_msg_tx_err(pegasus))
+			printk(KERN_WARNING "%s: no tx stall recovery\n",
+					net->name);
+		return;
+	case -ENOENT:
+	case -ECONNRESET:
+	case -ESHUTDOWN:
+		if (netif_msg_ifdown(pegasus))
+			pr_debug("%s: tx unlink, %d\n", net->name, urb->status);
+		return;
+	default:
+		if (netif_msg_tx_err(pegasus))
+			pr_info("%s: TX status %d\n", net->name, urb->status);
+		/* FALL THROUGH */
+	case 0:
+		break;
+	}
+
+	net->trans_start = jiffies;
+	netif_wake_queue(net);
+}
+
+static void intr_callback(struct urb *urb)
+{
+	pegasus_t *pegasus = urb->context;
+	struct net_device *net;
+	int status;
+
+	if (!pegasus)
+		return;
+	net = pegasus->net;
+
+	switch (urb->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
+		 */
+		if (netif_msg_timer(pegasus))
+			pr_debug("%s: intr status %d\n", net->name,
+					urb->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)) {
+			pegasus->stats.tx_errors++;
+			if (d[0] & TX_UNDERRUN)
+				pegasus->stats.tx_fifo_errors++;
+			if (d[0] & (EXCESSIVE_COL | JABBER_TIMEOUT))
+				pegasus->stats.tx_aborted_errors++;
+			if (d[0] & LATE_COL)
+				pegasus->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 */
+		pegasus->stats.rx_missed_errors += ((d[3] & 0x7f) << 8) | d[4];
+	}
+
+	status = usb_submit_urb(urb, GFP_ATOMIC);
+	if (status == -ENODEV)
+		netif_device_detach(pegasus->net);
+	if (status && netif_msg_timer(pegasus))
+		printk(KERN_ERR "%s: can't resubmit interrupt urb, %d\n",
+				net->name, status);
+}
+
+static void pegasus_tx_timeout(struct net_device *net)
+{
+	pegasus_t *pegasus = netdev_priv(net);
+	if (netif_msg_timer(pegasus))
+		printk(KERN_WARNING "%s: tx timeout\n", net->name);
+	usb_unlink_urb(pegasus->tx_urb);
+	pegasus->stats.tx_errors++;
+}
+
+static int 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))) {
+		if (netif_msg_tx_err(pegasus))
+			printk(KERN_WARNING "%s: fail tx, %d\n",
+					net->name, res);
+		switch (res) {
+		case -EPIPE:		/* stall, or disconnect from TT */
+			/* cleanup should already have been scheduled */
+			break;
+		case -ENODEV:		/* disconnect() upcoming */
+			netif_device_detach(pegasus->net);
+			break;
+		default:
+			pegasus->stats.tx_errors++;
+			netif_start_queue(net);
+		}
+	} else {
+		pegasus->stats.tx_packets++;
+		pegasus->stats.tx_bytes += skb->len;
+		net->trans_start = jiffies;
+	}
+	dev_kfree_skb(skb);
+
+	return 0;
+}
+
+static struct net_device_stats *pegasus_netdev_stats(struct net_device *dev)
+{
+	return &((pegasus_t *) netdev_priv(dev))->stats;
+}
+
+static inline void disable_net_traffic(pegasus_t * pegasus)
+{
+	int tmp = 0;
+
+	set_registers(pegasus, EthCtrl0, 2, &tmp);
+}
+
+static inline void get_interrupt_interval(pegasus_t * pegasus)
+{
+	__u8 data[2];
+
+	read_eprom_word(pegasus, 4, (__u16 *) data);
+	if (pegasus->usb->speed != USB_SPEED_HIGH) {
+		if (data[1] < 0x80) {
+			if (netif_msg_timer(pegasus))
+				dev_info(&pegasus->intf->dev, "intr interval "
+					"changed from %ums to %ums\n",
+					data[1], 0x80);
+			data[1] = 0x80;
+#ifdef PEGASUS_WRITE_EEPROM
+			write_eprom_word(pegasus, 4, *(__u16 *) data);
+#endif
+		}
+	}
+	pegasus->intr_interval = data[1];
+}
+
+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);
+	usb_free_urb(pegasus->ctrl_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);
+	usb_kill_urb(pegasus->ctrl_urb);
+}
+
+static int alloc_urbs(pegasus_t * pegasus)
+{
+	pegasus->ctrl_urb = usb_alloc_urb(0, GFP_KERNEL);
+	if (!pegasus->ctrl_urb) {
+		return 0;
+	}
+	pegasus->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
+	if (!pegasus->rx_urb) {
+		usb_free_urb(pegasus->ctrl_urb);
+		return 0;
+	}
+	pegasus->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
+	if (!pegasus->tx_urb) {
+		usb_free_urb(pegasus->rx_urb);
+		usb_free_urb(pegasus->ctrl_urb);
+		return 0;
+	}
+	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);
+		usb_free_urb(pegasus->ctrl_urb);
+		return 0;
+	}
+
+	return 1;
+}
+
+static int pegasus_open(struct net_device *net)
+{
+	pegasus_t *pegasus = netdev_priv(net);
+	int res;
+
+	if (pegasus->rx_skb == NULL)
+		pegasus->rx_skb = pull_skb(pegasus);
+	/*
+	 ** Note: no point to free the pool.  it is empty :-)
+	 */
+	if (!pegasus->rx_skb)
+		return -ENOMEM;
+
+	res = 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 + 8,
+			  read_bulk_callback, pegasus);
+	if ((res = usb_submit_urb(pegasus->rx_urb, GFP_KERNEL))) {
+		if (res == -ENODEV)
+			netif_device_detach(pegasus->net);
+		if (netif_msg_ifup(pegasus))
+			pr_debug("%s: failed rx_urb, %d", net->name, 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);
+		if (netif_msg_ifup(pegasus))
+			pr_debug("%s: failed intr_urb, %d\n", net->name, res);
+		usb_kill_urb(pegasus->rx_urb);
+		goto exit;
+	}
+	if ((res = enable_net_traffic(net, pegasus->usb))) {
+		if (netif_msg_ifup(pegasus))
+			pr_debug("%s: can't enable_net_traffic() - %d\n",
+					net->name, res);
+		res = -EIO;
+		usb_kill_urb(pegasus->rx_urb);
+		usb_kill_urb(pegasus->intr_urb);
+		free_skb_pool(pegasus);
+		goto exit;
+	}
+	set_carrier(net);
+	netif_start_queue(net);
+	if (netif_msg_ifup(pegasus))
+		pr_debug("%s: open\n", net->name);
+	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);
+	strncpy(info->driver, driver_name, sizeof (info->driver) - 1);
+	strncpy(info->version, DRIVER_VERSION, sizeof (info->version) - 1);
+	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;
+	
+	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;
+	return set_register(pegasus, WakeupControl, reg78);
+}
+
+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_settings(struct net_device *dev, struct ethtool_cmd *ecmd)
+{
+	pegasus_t *pegasus;
+
+	if (in_atomic())
+		return 0;
+
+	pegasus = netdev_priv(dev);
+	mii_ethtool_gset(&pegasus->mii, ecmd);
+
+	return 0;
+}
+
+static int
+pegasus_set_settings(struct net_device *dev, struct ethtool_cmd *ecmd)
+{
+	pegasus_t *pegasus = netdev_priv(dev);
+	return mii_ethtool_sset(&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;
+}