patch-2.4.25 linux-2.4.25/drivers/usb/ax8817x.c

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diff -urN linux-2.4.24/drivers/usb/ax8817x.c linux-2.4.25/drivers/usb/ax8817x.c
@@ -1,1291 +0,0 @@
-/*
- * ASIX AX8817x USB 2.0 10/100/HomePNA Ethernet controller driver
- *
- * $Id: ax8817x.c,v 1.15 2003/06/15 18:45:21 dhollis Exp $
- *
- * Copyright (c) 2002-2003 TiVo Inc.
- *
- * This software may be used and distributed according to the terms
- * of the GNU General Public License, incorporated herein by reference.
- *
- * History 
- *
- *	2003-06-28 - Dave Hollis <dhollis@davehollis.com>  1.0.2
- *		* Added support for Intellinet
- *	2003-06-12 - Dave Hollis <dhollis@davehollis.com>  1.0.1
- *		* use usb_make_path for ethtool info
- *		* Use crc32.h for crc functions
- *		* Additional callback cases for other host ctrlrs
- *		* Force minimum default rcv buffers
- *
- *	2003-06-12 - Dave Hollis <dhollis@davehollis.com>  1.0.0
- *		* Backport removal of multiple tx_urb / lengthy 
- *		  start_xmit routines, etc.
- *		* ethtool driver name returns driver name, not
- *		  long description
- *
- *	2003-06-05 - Dave Hollis <dhollis@davehollis.com>  0.9.9
- *		* Cleanup unnecessary #if 0
- *		* Fix coding style to match kernel style
- *
- *	2003-05-31 - Dave Hollis <dhollis@davehollis.com>  0.9.8
- *		* Don't stop/start the queue in start_xmit
- *		* Swallow URB status upon hard removal
- *		* Cleanup remaining comments (kill // style)
- *
- *	2003-05-29 - Dave Hollis <dhollis@davehollis.com>  0.9.7
- *		* Set module owner
- *		* Follow-up on suggestions from David Brownell &
- *		  Oliver Neukum which should help with robustness
- *		* Use ether_crc from stock kernel if available
- *
- *	2003-05-28 - Dave Hollis <dhollis@davehollis.com>  0.9.6
- *		* Added basic ethtool & mii support
- *
- *	2003-05-28 - Dave Hollis <dhollis@davehollis.com>  0.9.5
- *		* Workout devrequest change to usb_ctrlrequest structure
- *		* Replace FILL_BULK_URB macros to non-deprecated 
- *		  usb_fill_bulk_urb macros
- *		* Replace printks with equivalent macros
- *		* Use defines for module description, version, author to
- *		  simplify future changes
- *
- * Known Issues
- *	usb-uhci.c: process_transfer: fixed toggle message to console
- *		Possible bug in usb-uhci or bug in this driver that
- *		makes it spit that out.  Doesn't seem to have harmful
- *		effects.
- *
- * Todo
- *	Fix mii/ethtool output
-*/
-
-#include <linux/slab.h>
-
-#include <linux/init.h>
-#include <linux/module.h>
-#include <linux/usb.h>
-
-#include <linux/netdevice.h>
-#include <linux/etherdevice.h>
-#include <linux/ethtool.h>
-#include <linux/skbuff.h>
-#include <linux/mii.h>
-#include <asm/uaccess.h>
-#include <linux/crc32.h>
-
-/* Version Information */
-#define DRIVER_VERSION "v1.0.0"
-#define DRIVER_AUTHOR "TiVo, Inc."
-#define DRIVER_DESC "ASIX AX8817x USB Ethernet driver"
-
-MODULE_DESCRIPTION(DRIVER_DESC);
-MODULE_AUTHOR(DRIVER_AUTHOR);
-MODULE_LICENSE("GPL");
-
-
-#define AX_REQ_READ         ( USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE )
-#define AX_REQ_WRITE        ( USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE )
-
-#define AX_CMD_SET_SW_MII           0x06
-#define AX_CMD_READ_MII_REG         0x07
-#define AX_CMD_WRITE_MII_REG        0x08
-#define AX_CMD_SET_HW_MII           0x0a
-#define AX_CMD_WRITE_RX_CTL         0x10
-#define AX_CMD_WRITE_MULTI_FILTER   0x16
-#define AX_CMD_READ_NODE_ID         0x17
-#define AX_CMD_READ_PHY_ID          0x19
-#define AX_CMD_WRITE_MEDIUM_MODE    0x1b
-#define AX_CMD_WRITE_GPIOS          0x1f
-
-#define AX_RX_MAX                   ETH_FRAME_LEN
-#define AX_TIMEOUT_CMD              ( HZ / 10 )
-#define AX_TIMEOUT_TX               ( HZ * 2 )
-#define AX_MAX_MCAST                64
-
-#define AX_DRV_STATE_INITIALIZING   0x00
-#define AX_DRV_STATE_RUNNING        0x01
-#define AX_DRV_STATE_EXITING        0x02
-
-#define AX_PHY_STATE_INITIALIZING   0x00
-#define AX_PHY_STATE_NO_LINK        0x01
-#define AX_PHY_STATE_POLLING_1      0x02
-#define AX_PHY_STATE_POLLING_2      0x03
-#define AX_PHY_STATE_POLLING_3      0x04
-#define AX_PHY_STATE_POLLING_4      0x05
-#define AX_PHY_STATE_SETTING_MAC    0x06
-#define AX_PHY_STATE_LINK           0x07
-#define AX_PHY_STATE_ABORT_POLL     0x08
-#define AX_PHY_STATE_ABORTING       0x09
-
-#define AX_MAX_PHY_RETRY            50
-
-#define AX_RX_URBS_DEFAULT	    2
-
-static const char driver_name[] = "ax8817x";
-static int n_rx_urbs = AX_RX_URBS_DEFAULT;
-
-MODULE_PARM(n_rx_urbs, "i");
-MODULE_PARM_DESC(n_rx_urbs,
-		 "Number of rx buffers to queue at once (def 2)");
-
-struct ax8817x_info;
-struct ax_cmd_req;
-typedef int (*ax_cmd_callback_t) (struct ax8817x_info *,
-				  struct ax_cmd_req *);
-
-struct ax_cmd_req {
-	struct list_head list;
-	ax_cmd_callback_t cmd_callback;
-	void *priv;
-	int status;
-	void *data;
-	int data_size;
-	int timeout;
-	struct usb_ctrlrequest devreq;
-};
-
-struct ax8817x_info {
-	struct usb_device *usb;
-	struct net_device *net;
-	struct urb **rx_urbs;
-	struct urb *tx_urb;
-	struct urb *int_urb;
-	u8 *int_buf;
-	struct urb *ctl_urb;
-	struct list_head ctl_queue;
-	spinlock_t ctl_lock;
-	atomic_t rx_refill_cnt;
-	int tx_head;
-	int tx_tail;
-	spinlock_t tx_lock;
-	struct net_device_stats stats;
-	struct ax_cmd_req phy_req;
-	u8 phy_id;
-	u8 phy_state;
-	u8 drv_state;
-};
-
-
-const struct usb_device_id ax8817x_id_table[] __devinitdata = {
-	/* Linksys USB200M */
-      {USB_DEVICE(0x077b, 0x2226), driver_info:0x00130103},
-	/* Hawking UF200, TRENDnet TU2-ET100 */
-      {USB_DEVICE(0x07b8, 0x420a), driver_info:0x001f1d1f},
-	/* NETGEAR FA120 */
-      {USB_DEVICE(0x0846, 0x1040), driver_info:0x00130103},
-	/* D-Link DUB-E100 */
-      {USB_DEVICE(0x2001, 0x1a00), driver_info:0x009f9d9f},
-	/* Intellinet USB Ethernet*/
-      {USB_DEVICE(0x0b95, 0x1720), driver_info:0x00130103},
-
-	{}
-};
-
-MODULE_DEVICE_TABLE(usb, ax8817x_id_table);
-
-static void ax_run_ctl_queue(struct ax8817x_info *, struct ax_cmd_req *,
-			     int);
-static void ax_rx_callback(struct urb *urb);
-
-static void ax_ctl_callback(struct urb *urb)
-{
-	struct ax8817x_info *ax_info =
-	    (struct ax8817x_info *) urb->context;
-
-	ax_run_ctl_queue(ax_info, NULL,
-			 urb->status ? urb->status : urb->actual_length);
-}
-
-/* 
- * Queue a new ctl request, or dequeue the first in the list
-*/
-static void ax_run_ctl_queue(struct ax8817x_info *ax_info,
-			     struct ax_cmd_req *req, int status)
-{
-	struct ax_cmd_req *next_req = NULL;
-	struct ax_cmd_req *last_req = NULL;
-	unsigned long flags;
-
-	/* Need to lock around queue list manipulation */
-	spin_lock_irqsave(&ax_info->ctl_lock, flags);
-
-	if (req == NULL) {
-		last_req =
-		    list_entry(ax_info->ctl_queue.next, struct ax_cmd_req,
-			       list);
-	} else {
-		if (list_empty(&ax_info->ctl_queue)) {
-			next_req = req;
-		}
-
-		req->status = -EINPROGRESS;
-		list_add_tail(&req->list, &ax_info->ctl_queue);
-	}
-
-	while (1) {
-		if (last_req != NULL) {
-			/* dequeue completed entry */
-			list_del(&last_req->list);
-
-			last_req->status = status;
-			if (last_req->cmd_callback(ax_info, last_req)) {
-				/* requeue if told to do so */
-				last_req->status = -EINPROGRESS;
-				list_add_tail(&last_req->list,
-					      &ax_info->ctl_queue);
-			}
-
-			if (list_empty(&ax_info->ctl_queue)) {
-				next_req = NULL;
-			} else {
-				next_req =
-				    list_entry(ax_info->ctl_queue.next,
-					       struct ax_cmd_req, list);
-			}
-		}
-
-		spin_unlock_irqrestore(&ax_info->ctl_lock, flags);
-
-		if (next_req == NULL) {
-			break;
-		}
-
-		/* XXX: do something with timeout */
-		usb_fill_control_urb(ax_info->ctl_urb, ax_info->usb,
-				     next_req->devreq.
-				     bRequestType & USB_DIR_IN ?
-				     usb_rcvctrlpipe(ax_info->usb,
-						     0) :
-				     usb_sndctrlpipe(ax_info->usb, 0),
-				     (void *) &next_req->devreq,
-				     next_req->data, next_req->data_size,
-				     ax_ctl_callback, ax_info);
-
-		status = usb_submit_urb(ax_info->ctl_urb);
-		if (status >= 0) {
-			break;
-		}
-
-		last_req = next_req;
-
-		spin_lock_irqsave(&ax_info->ctl_lock, flags);
-	}
-}
-
-static int ax_sync_cmd_callback(struct ax8817x_info *unused,
-				struct ax_cmd_req *req)
-{
-	wait_queue_head_t *wq = (wait_queue_head_t *) req->priv;
-
-	wake_up(wq);
-
-	return 0;
-}
-
-static int ax_async_cmd_callback(struct ax8817x_info *unused,
-				 struct ax_cmd_req *req)
-{
-	if (req->status < 0) {
-		err("%s: Async command %d failed: %d\n", __FUNCTION__,
-		    req->devreq.bRequest, req->status);
-	}
-
-	/* Nothing else to do here, just need to free the request (and its
-	   allocated data) */
-	if (req->data != NULL) {
-		kfree(req->data);
-	}
-	kfree(req);
-
-	return 0;
-}
-
-/*
- * This is mostly the same as usb_control_msg(), except that it is able
- * to queue control messages
-*/
-static int ax_control_msg(struct ax8817x_info *ax_info, u8 requesttype,
-			  u8 request, u16 value, u16 index, void *data,
-			  u16 size, int timeout)
-{
-	struct ax_cmd_req *req;
-	DECLARE_WAIT_QUEUE_HEAD(wq);
-	DECLARE_WAITQUEUE(wait, current);
-	int ret;
-
-	req = kmalloc(sizeof(struct ax_cmd_req), GFP_KERNEL);
-	if (req == NULL) {
-		return -ENOMEM;
-	}
-
-	req->devreq.bRequestType = requesttype;
-	req->devreq.bRequest = request;
-	req->devreq.wValue = cpu_to_le16(value);
-	req->devreq.wIndex = cpu_to_le16(index);
-	req->devreq.wLength = cpu_to_le16(size);
-	req->data = data;
-	req->data_size = size;
-	req->timeout = timeout;
-
-	req->priv = &wq;
-	set_current_state(TASK_UNINTERRUPTIBLE);
-	add_wait_queue(&wq, &wait);
-
-	req->cmd_callback = ax_sync_cmd_callback;
-
-	ax_run_ctl_queue(ax_info, req, 0);
-	schedule();
-
-	ret = req->status;
-
-	kfree(req);
-
-	return ret;
-}
-
-/*
- * Same, but can be used asynchronously, may fail, and returns no exit
- * status
-*/
-static void ax_control_msg_async(struct ax8817x_info *ax_info,
-				 u8 requesttype, u8 request, u16 value,
-				 u16 index, void *data, u16 size,
-				 int timeout)
-{
-	struct ax_cmd_req *req;
-
-	req = kmalloc(sizeof(struct ax_cmd_req), GFP_ATOMIC);
-	if (req == NULL) {
-		/* There's not much else we can do here... */
-		err("%s: Failed alloc\n", __FUNCTION__);
-		return;
-	}
-
-	req->devreq.bRequestType = requesttype;
-	req->devreq.bRequest = request;
-	req->devreq.wValue = cpu_to_le16(value);
-	req->devreq.wIndex = cpu_to_le16(index);
-	req->devreq.wLength = cpu_to_le16(size);
-	req->data = data;
-	req->data_size = size;
-	req->timeout = timeout;
-
-	req->cmd_callback = ax_async_cmd_callback;
-
-	ax_run_ctl_queue(ax_info, req, 0);
-}
-
-static inline int ax_read_cmd(struct ax8817x_info *ax_info, u8 cmd,
-			      u16 value, u16 index, u16 size, void *data)
-{
-	return ax_control_msg(ax_info, AX_REQ_READ, cmd, value, index,
-			      data, size, AX_TIMEOUT_CMD);
-}
-
-static inline int ax_write_cmd(struct ax8817x_info *ax_info, u8 cmd,
-			       u16 value, u16 index, u16 size, void *data)
-{
-	return ax_control_msg(ax_info, AX_REQ_WRITE, cmd, value, index,
-			      data, size, AX_TIMEOUT_CMD);
-}
-
-static inline void ax_write_cmd_async(struct ax8817x_info *ax_info, u8 cmd,
-				      u16 value, u16 index, u16 size,
-				      void *data)
-{
-	ax_control_msg_async(ax_info, AX_REQ_WRITE, cmd, value, index,
-			     data, size, AX_TIMEOUT_CMD);
-}
-
-static int ax_refill_rx_urb(struct ax8817x_info *ax_info, struct urb *urb)
-{
-	struct sk_buff *skb;
-	int ret;
-
-	skb = dev_alloc_skb(AX_RX_MAX + 2);
-	if (skb != NULL) {
-		skb_reserve(skb, 2);	/* for IP header alignment */
-		skb->dev = ax_info->net;
-
-		usb_fill_bulk_urb(urb, ax_info->usb,
-				  usb_rcvbulkpipe(ax_info->usb, 3),
-				  skb->data, AX_RX_MAX, ax_rx_callback,
-				  skb);
-
-		ret = usb_submit_urb(urb);
-		if (ret < 0) {
-			err("Failed submit rx URB (%d)\n", ret);
-			dev_kfree_skb_irq(skb);
-			urb->context = NULL;
-		} else {
-			ret = 0;
-		}
-	} else {
-		/* this just means we're low on memory at the moment. Try to
-		   handle it gracefully. */
-		urb->context = NULL;
-		ret = 1;
-	}
-
-	return ret;
-}
-
-static int ax_phy_cmd_callback(struct ax8817x_info *ax_info,
-			       struct ax_cmd_req *req)
-{
-	int full_duplex;
-	int flow_control;
-	u16 mii_data_le;
-
-	if (req->status < 0) {
-		err("%s: Failed at state %d: %d\n", __FUNCTION__,
-		    ax_info->phy_state, req->status);
-		/* Not sure what else we can do, so just bail */
-		ax_info->phy_state = AX_PHY_STATE_ABORTING;
-	}
-
-	switch (ax_info->phy_state) {
-		/* Now that we're in software MII mode, read the BMSR */
-	case AX_PHY_STATE_POLLING_1:
-		ax_info->phy_state = AX_PHY_STATE_POLLING_2;
-		req->devreq.bRequestType = AX_REQ_READ;
-		req->devreq.bRequest = AX_CMD_READ_MII_REG;
-		req->devreq.wValue = cpu_to_le16(ax_info->phy_id);
-		req->devreq.wIndex = cpu_to_le16(MII_BMSR);
-		req->devreq.wLength = cpu_to_le16(2);
-		req->data_size = 2;
-		(long) req->priv = 0;	/* This is the retry count */
-		return 1;
-
-		/* Done reading BMSR */
-	case AX_PHY_STATE_POLLING_2:
-		mii_data_le = *(u16 *) req->data;
-		if ((mii_data_le &
-		     cpu_to_le16(BMSR_LSTATUS | BMSR_ANEGCAPABLE))
-		    == cpu_to_le16(BMSR_LSTATUS | BMSR_ANEGCAPABLE)) {
-			if (mii_data_le & cpu_to_le16(BMSR_ANEGCOMPLETE)) {
-				/* Autonegotiation done, go on to read LPA */
-				ax_info->phy_state =
-				    AX_PHY_STATE_POLLING_3;
-				req->devreq.wIndex = cpu_to_le16(MII_LPA);
-				return 1;
-			} else if ((long) req->priv++ < AX_MAX_PHY_RETRY) {
-				/* Reread BMSR if it's still autonegotiating. This is
-				   probably unnecessary logic, I've never seen it take
-				   more than 1 try... */
-				return 1;
-			}
-			/* else fall through to abort */
-		}
-		/* XXX: should probably handle auto-neg failure better,
-		   by reverting to manual setting of something safe. (?) */
-
-		ax_info->phy_state = AX_PHY_STATE_ABORT_POLL;
-		/* and then fall through to set hw MII */
-
-		/* Got what we needed from PHY, set back to hardware MII mode
-		   (Do same for abort in mid-poll) */
-	case AX_PHY_STATE_POLLING_3:
-	case AX_PHY_STATE_ABORT_POLL:
-		ax_info->phy_state += 1;
-		req->devreq.bRequestType = AX_REQ_WRITE;
-		req->devreq.bRequest = AX_CMD_SET_HW_MII;
-		req->devreq.wValue = cpu_to_le16(0);
-		req->devreq.wIndex = cpu_to_le16(0);
-		req->devreq.wLength = cpu_to_le16(0);
-		req->data_size = 0;
-		return 1;
-
-		/* The end result, set the right duplex and flow control mode in the
-		   MAC (based on the PHY's LPA reg, which should still be in the data
-		   buffer) */
-	case AX_PHY_STATE_POLLING_4:
-		mii_data_le = *(u16 *) req->data;
-		ax_info->phy_state = AX_PHY_STATE_SETTING_MAC;
-		req->devreq.bRequest = AX_CMD_WRITE_MEDIUM_MODE;
-		full_duplex = mii_data_le & cpu_to_le16(LPA_DUPLEX);
-		flow_control = full_duplex &&
-		    (mii_data_le & cpu_to_le16(0x0400));
-		req->devreq.wValue = cpu_to_le16(0x04) |
-		    (full_duplex ? cpu_to_le16(0x02) : 0) |
-		    (flow_control ? cpu_to_le16(0x10) : 0);
-		info("%s: Link established, %s duplex, flow control %sabled\n", ax_info->net->name, full_duplex ? "full" : "half", flow_control ? "en" : "dis");
-		return 1;
-
-		/* All done */
-	case AX_PHY_STATE_SETTING_MAC:
-		ax_info->phy_state = AX_PHY_STATE_LINK;
-		netif_carrier_on(ax_info->net);
-		return 0;
-
-	default:
-		err("%s: Unknown state %d\n", __FUNCTION__,
-		    ax_info->phy_state);
-		/* fall through */
-	case AX_PHY_STATE_ABORTING:
-		ax_info->phy_state = AX_PHY_STATE_NO_LINK;
-		return 0;
-	}
-}
-
-static void ax_int_callback(struct urb *urb)
-{
-	struct ax8817x_info *ax_info =
-	    (struct ax8817x_info *) urb->context;
-	u8 phy_link;
-
-	if (ax_info->drv_state == AX_DRV_STATE_EXITING ||
-	    urb->actual_length < 3) {
-		return;
-	}
-
-	/* Ignore the first PHY link report, it will sometimes be reported as
-	   link active, even though we just told the PHY to reset. If it
-	   really has link, we'll pick it up next int callback.
-	 */
-	if (ax_info->phy_state == AX_PHY_STATE_INITIALIZING) {
-		netif_carrier_off(ax_info->net);
-		ax_info->phy_state = AX_PHY_STATE_NO_LINK;
-		return;
-	}
-
-	/* Assume we're only interested in the primary PHY for now. */
-	phy_link = ax_info->int_buf[2] & 1;
-
-	if (phy_link ==
-	    (ax_info->phy_state == AX_PHY_STATE_NO_LINK) ? 0 : 1) {
-		/* Common case, no change */
-		return;
-	}
-
-	if (phy_link == 0) {
-		netif_carrier_off(ax_info->net);
-		/* Abort an in-progress poll of the PHY if necessary */
-		switch (ax_info->phy_state) {
-		case AX_PHY_STATE_POLLING_1:
-		case AX_PHY_STATE_POLLING_2:
-		case AX_PHY_STATE_POLLING_3:
-			ax_info->phy_state = AX_PHY_STATE_ABORT_POLL;
-			break;
-
-		case AX_PHY_STATE_POLLING_4:
-		case AX_PHY_STATE_SETTING_MAC:
-			ax_info->phy_state = AX_PHY_STATE_ABORTING;
-			break;
-
-		case AX_PHY_STATE_LINK:
-			ax_info->phy_state = AX_PHY_STATE_NO_LINK;
-			break;
-
-		default:
-			/* If we're already aborting, continue aborting */
-			break;
-		}
-	} else {
-		/* Note that we only fall into this case if previous phy_state was
-		   AX_PHY_STATE_NO_LINK. When the link is reported active while
-		   we're still polling, or when we're aborting, the logic above
-		   will just return, and we'll check again next int callback. */
-
-		ax_info->phy_state = AX_PHY_STATE_POLLING_1;
-		ax_info->phy_req.devreq.bRequestType = AX_REQ_WRITE;
-		ax_info->phy_req.devreq.bRequest = AX_CMD_SET_SW_MII;
-		ax_info->phy_req.devreq.wValue = cpu_to_le16(0);
-		ax_info->phy_req.devreq.wIndex = cpu_to_le16(0);
-		ax_info->phy_req.devreq.wLength = cpu_to_le16(0);
-		ax_info->phy_req.data_size = 0;
-		ax_info->phy_req.timeout = AX_TIMEOUT_CMD;
-		ax_info->phy_req.cmd_callback = ax_phy_cmd_callback;
-
-		ax_run_ctl_queue(ax_info, &ax_info->phy_req, 0);
-	}
-}
-
-static void ax_rx_callback(struct urb *urb)
-{
-	struct sk_buff *skb = (struct sk_buff *) urb->context;
-	struct net_device *net = skb->dev;
-	struct ax8817x_info *ax_info = (struct ax8817x_info *) net->priv;
-	int ret, len, refill;
-
-	switch (urb->status) {
-	case 0:
-		break;
-
-	default:
-		err("%s: URB status %d\n", __FUNCTION__, urb->status);
-		/* It's not clear that we can do much in this case, the rx pipe
-		   doesn't ever seem to stall, so if we got -ETIMEDOUT, that
-		   usually means the device was unplugged, and we just haven't
-		   noticed yet.
-		   Just fall through and free skb without resubmitting urb. */
-	case -ENOENT:		/* */
-	case -ECONNRESET:	/* Async unlink */
-	case -ESHUTDOWN:	/* Hardware gone */
-	case -EILSEQ:		/* Get this when you yank it out on UHCI */
-	case -ETIMEDOUT:	/* OHCI */
-	case -EPROTO:		/* EHCI */
-	case -EPIPE:		
-		dev_kfree_skb_any(skb);
-		urb->context = NULL;
-		return;
-	}
-
-	if (ax_info->drv_state == AX_DRV_STATE_INITIALIZING) {
-		/* Not really expecting this to ever happen, since we haven't yet
-		   enabled receive in the rx_ctl register, but ya never know... */
-		goto refill_same;
-	} else if (ax_info->drv_state == AX_DRV_STATE_EXITING) {
-		dev_kfree_skb_any(skb);
-		urb->context = NULL;
-		return;
-	}
-
-	len = urb->actual_length;
-	if (len == 0) {
-		/* this shouldn't happen... */
-		goto refill_same;
-	}
-
-	refill = ax_refill_rx_urb(ax_info, urb);
-
-	if (refill == 0
-	    || atomic_read(&ax_info->rx_refill_cnt) < n_rx_urbs) {
-		/* Send the receive buffer up the network stack */
-		skb_put(skb, len);
-		skb->protocol = eth_type_trans(skb, net);
-		net->last_rx = jiffies;
-		ax_info->stats.rx_packets++;
-		ax_info->stats.rx_bytes += len;
-
-		netif_rx(skb);
-
-		if (refill == 0) {
-			int i;
-
-			/* This is the common case. This URB got refilled OK, and
-			   no other URBs need to be refilled. */
-			if (atomic_read(&ax_info->rx_refill_cnt) == 0) {
-				return;
-			}
-
-			for (i = 0; i < n_rx_urbs; i++) {
-				struct urb *urb = ax_info->rx_urbs[i];
-
-				if (urb->context == NULL) {
-					if (ax_refill_rx_urb(ax_info, urb)
-					    == 0) {
-						atomic_dec(&ax_info->
-							   rx_refill_cnt);
-					} else {
-						break;
-					}
-				}
-			}
-		} else {
-			/* remember to refill this one later */
-			atomic_inc(&ax_info->rx_refill_cnt);
-		}
-
-		return;
-	} else {
-		ax_info->stats.rx_dropped++;
-		if (refill < 0) {
-			/* the error code was already printk'ed in ax_refill_rx_urb()
-			   so just note the consequences here: */
-			warn("Halting rx due to error\n");
-			return;
-		}
-
-		/* fall through to resubmit this URB with the existing skb
-		   will try to reallocate skb's on next rx callback */
-	}
-
-      refill_same:
-	usb_fill_bulk_urb(urb, ax_info->usb,
-			  usb_rcvbulkpipe(ax_info->usb, 3), skb->data,
-			  AX_RX_MAX, ax_rx_callback, skb);
-
-	ret = usb_submit_urb(urb);
-	if (ret < 0) {
-		err("Failed submit rx URB (%d)\n", ret);
-	}
-}
-
-static int ax8817x_open(struct net_device *net)
-{
-	struct ax8817x_info *ax_info = (struct ax8817x_info *) net->priv;
-	u8 buf[4];
-	int i, ret;
-
-	ret = ax_write_cmd(ax_info, AX_CMD_WRITE_RX_CTL, 0x80, 0, 0, buf);
-	if (ret < 0) {
-		return ret;
-	}
-
-	ret = 0;
-
-	ax_info->tx_urb = usb_alloc_urb(0);
-	if (ax_info->tx_urb == NULL)
-		ret = -ENOMEM;
-
-	atomic_set(&ax_info->rx_refill_cnt, 0);
-
-	for (i = 0; i < n_rx_urbs && ret == 0; i++) {
-		struct urb *urb = ax_info->rx_urbs[i];
-
-		if (urb == NULL) {
-			urb = ax_info->rx_urbs[i] = usb_alloc_urb(0);
-			if (urb == NULL) {
-				ret = -ENOMEM;
-				break;
-			}
-			if (n_rx_urbs > 1) {
-				urb->transfer_flags |= USB_QUEUE_BULK;
-			}
-		}
-		ret = ax_refill_rx_urb(ax_info, urb);
-		if (ret == 1) {
-			atomic_inc(&ax_info->rx_refill_cnt);
-			ret = 0;
-		}
-	}
-
-	/* XXX: should handle the case where we couldn't allocate any skb's
-	   better. They get allocated with GFP_ATOMIC, so they may all fail... */
-	if (ret == 0 && atomic_read(&ax_info->rx_refill_cnt) < n_rx_urbs) {
-		netif_start_queue(net);
-	} else {
-		/* Error: clean up anything we allocated and bail. */
-		usb_free_urb(ax_info->tx_urb);
-
-		for (i = 0; i < n_rx_urbs; i++) {
-			struct urb *urb = ax_info->rx_urbs[i];
-
-			if (urb != NULL) {
-				/* skb gets freed in the URB callback */
-				usb_unlink_urb(urb);
-				usb_free_urb(urb);
-			}
-		}
-
-		err("%s: Failed start rx queue (%d)\n", __FUNCTION__, ret);
-	}
-	return ret;
-}
-
-static int ax8817x_stop(struct net_device *net)
-{
-	struct ax8817x_info *ax_info = (struct ax8817x_info *) net->priv;
-	u8 buf[4];
-	int i, ret;
-
-	netif_stop_queue(net);
-
-	ret = ax_write_cmd(ax_info, AX_CMD_WRITE_RX_CTL, 0x80, 0, 0, buf);
-	if (ret < 0 && ax_info->drv_state != AX_DRV_STATE_EXITING) {
-		err("%s: Failed cmd (%d)\n", __FUNCTION__, ret);
-	}
-
-	if (ax_info->tx_urb != NULL) {
-		usb_unlink_urb(ax_info->tx_urb);
-		usb_free_urb(ax_info->tx_urb);
-		ax_info->tx_urb = NULL;
-	}
-
-	for (i = 0; i < n_rx_urbs; i++) {
-		struct urb *urb = ax_info->rx_urbs[i];
-		if (urb != NULL) {
-			/* skb gets freed in the URB callback */
-			usb_unlink_urb(urb);
-			usb_free_urb(urb);
-			ax_info->rx_urbs[i] = NULL;
-		}
-	}
-
-	return 0;
-}
-
-static void write_bulk_callback(struct urb *urb)
-{
-	struct ax8817x_info *ax_info = urb->context;
-
-	if (!ax_info || (ax_info->drv_state == AX_DRV_STATE_EXITING))
-		return;
-
-	if (!netif_device_present(ax_info->net))
-		return;
-
-	if (urb->status)
-		info("%s: TX status %d", ax_info->net->name, urb->status);
-
-	ax_info->net->trans_start = jiffies;
-	netif_wake_queue(ax_info->net);
-}
-
-static int ax8817x_start_xmit(struct sk_buff *skb, struct net_device *net)
-{
-	struct ax8817x_info *ax_info = net->priv;
-	int res;
-
-	netif_stop_queue(net);
-
-	ax_info->tx_urb->transfer_flags |= USB_ZERO_PACKET;
-	usb_fill_bulk_urb(ax_info->tx_urb, ax_info->usb,
-			  usb_sndbulkpipe(ax_info->usb, 2),
-			  skb->data, skb->len, write_bulk_callback,
-			  ax_info);
-	if ((res = usb_submit_urb(ax_info->tx_urb))) {
-		warn("Failed tx_urb %d", res);
-		ax_info->stats.tx_errors++;
-		netif_start_queue(net);
-	} else {
-		ax_info->stats.tx_packets++;
-		ax_info->stats.tx_bytes += skb->len;
-		net->trans_start = jiffies;
-	}
-	dev_kfree_skb(skb);
-
-	return 0;
-}
-
-static void ax8817x_tx_timeout(struct net_device *net)
-{
-	struct ax8817x_info *ax_info = net->priv;
-
-	if (!ax_info)
-		return;
-
-	warn("%s: Tx timed out.", net->name);
-	ax_info->tx_urb->transfer_flags |= USB_ASYNC_UNLINK;
-	usb_unlink_urb(ax_info->tx_urb);
-	ax_info->stats.tx_errors++;
-}
-
-static struct net_device_stats *ax8817x_stats(struct net_device *net)
-{
-	struct ax8817x_info *ax_info = (struct ax8817x_info *) net->priv;
-
-	return &ax_info->stats;
-}
-
-static void ax8817x_set_multicast(struct net_device *net)
-{
-	struct ax8817x_info *ax_info = (struct ax8817x_info *) net->priv;
-	u8 rx_ctl = 0x8c;
-
-	if (net->flags & IFF_PROMISC) {
-		rx_ctl |= 0x01;
-	} else if (net->flags & IFF_ALLMULTI
-		   || net->mc_count > AX_MAX_MCAST) {
-		rx_ctl |= 0x02;
-	} else if (net->mc_count == 0) {
-		/* just broadcast and directed */
-	} else {
-		struct dev_mc_list *mc_list = net->mc_list;
-		u8 *multi_filter;
-		u32 crc_bits;
-		int i;
-
-		multi_filter = kmalloc(8, GFP_ATOMIC);
-		if (multi_filter == NULL) {
-			/* Oops, couldn't allocate a DMA buffer for setting the multicast
-			   filter. Try all multi mode, although the ax_write_cmd_async
-			   will almost certainly fail, too... (but it will printk). */
-			rx_ctl |= 0x02;
-		} else {
-			memset(multi_filter, 0, 8);
-
-			/* Build the multicast hash filter. */
-			for (i = 0; i < net->mc_count; i++) {
-				crc_bits =
-				    ether_crc(ETH_ALEN,
-					      mc_list->dmi_addr) >> 26;
-				multi_filter[crc_bits >> 3] |=
-				    1 << (crc_bits & 7);
-				mc_list = mc_list->next;
-			}
-
-			ax_write_cmd_async(ax_info,
-					   AX_CMD_WRITE_MULTI_FILTER, 0, 0,
-					   8, multi_filter);
-
-			rx_ctl |= 0x10;
-		}
-	}
-
-	ax_write_cmd_async(ax_info, AX_CMD_WRITE_RX_CTL, rx_ctl, 0, 0,
-			   NULL);
-}
-
-static int ax8817x_ethtool_ioctl(struct net_device *net, void *uaddr)
-{
-	struct ax8817x_info *ax_info;
-	int cmd;
-
-	ax_info = net->priv;
-	if (get_user(cmd, (int *) uaddr))
-		return -EFAULT;
-
-	switch (cmd) {
-	case ETHTOOL_GDRVINFO:{
-			struct ethtool_drvinfo info = { ETHTOOL_GDRVINFO };
-
-			strncpy(info.driver, driver_name,
-				ETHTOOL_BUSINFO_LEN);
-			strncpy(info.version, DRIVER_VERSION,
-				ETHTOOL_BUSINFO_LEN);
-			usb_make_path(ax_info->usb, info.bus_info,
-				      sizeof info.bus_info);
-			if (copy_to_user(uaddr, &info, sizeof(info)))
-				return -EFAULT;
-			return 0;
-		}
-	case ETHTOOL_GSET:{
-			struct ethtool_cmd ecmd;
-
-			if (copy_from_user(&ecmd, uaddr, sizeof(ecmd)))
-				return -EFAULT;
-			ecmd.supported = (SUPPORTED_10baseT_Half |
-					  SUPPORTED_10baseT_Full |
-					  SUPPORTED_100baseT_Half |
-					  SUPPORTED_100baseT_Full |
-					  SUPPORTED_Autoneg |
-					  SUPPORTED_TP | SUPPORTED_MII);
-			ecmd.port = PORT_TP;
-			ecmd.transceiver = XCVR_INTERNAL;
-			ecmd.phy_address = 0;	/* FIXME */
-
-			if (copy_to_user(uaddr, &ecmd, sizeof(ecmd)))
-				return -EFAULT;
-			return 0;
-		}
-	case ETHTOOL_SSET:
-		return -ENOTSUPP;
-	case ETHTOOL_GLINK:{
-			struct ethtool_value edata = { ETHTOOL_GLINK };
-
-			edata.data = netif_carrier_ok(net);
-			if (copy_to_user(uaddr, &edata, sizeof(edata)))
-				return -EFAULT;
-			return 0;
-		}
-	default:
-		return -EOPNOTSUPP;
-	}
-}
-
-static int ax8817x_mii_ioctl(struct net_device *net, struct ifreq *ifr,
-			     int cmd)
-{
-	struct ax8817x_info *ax_info;
-	struct mii_ioctl_data *data_ptr =
-	    (struct mii_ioctl_data *) &(ifr->ifr_data);
-
-	ax_info = net->priv;
-
-	switch (cmd) {
-	case SIOCGMIIPHY:
-		data_ptr->phy_id = ax_info->phy_id;
-		break;
-	case SIOCGMIIREG:
-		if (!capable(CAP_NET_ADMIN))
-			return -EPERM;
-
-		ax_read_cmd(ax_info, AX_CMD_READ_MII_REG, 0,
-			    data_ptr->reg_num & 0x1f, 2,
-			    &(data_ptr->val_out));
-		break;
-	default:
-		return -EOPNOTSUPP;
-	}
-	return 0;
-}
-
-static int ax8817x_ioctl(struct net_device *net, struct ifreq *ifr,
-			 int cmd)
-{
-	struct ax8817x_info *ax_info;
-	int res;
-
-	ax_info = net->priv;
-	res = 0;
-
-	switch (cmd) {
-	case SIOCETHTOOL:
-		res = ax8817x_ethtool_ioctl(net, ifr->ifr_data);
-		break;
-	case SIOCGMIIPHY:	/* Get address of PHY in use */
-	case SIOCGMIIREG:	/* Read from MII PHY register */
-	case SIOCSMIIREG:	/* Write to MII PHY register */
-		return ax8817x_mii_ioctl(net, ifr, cmd);
-	default:
-		res = -EOPNOTSUPP;
-	}
-
-	return res;
-}
-
-static int ax8817x_net_init(struct net_device *net)
-{
-	struct ax8817x_info *ax_info = (struct ax8817x_info *) net->priv;
-	u8 buf[6];
-	u16 *buf16 = (u16 *) buf;
-	int ret;
-
-	spin_lock_init(&ax_info->tx_lock);
-
-	ret = ax_write_cmd(ax_info, AX_CMD_WRITE_RX_CTL, 0x80, 0, 0, buf);
-	if (ret < 0) {
-		return ret;
-	}
-
-	memset(buf, 0, 6);
-
-	/* Get the MAC address */
-	ret = ax_read_cmd(ax_info, AX_CMD_READ_NODE_ID, 0, 0, 6, buf);
-	if (ret < 0) {
-		return ret;
-	}
-
-	memcpy(net->dev_addr, buf, 6);
-
-	/* Get the PHY id */
-	ret = ax_read_cmd(ax_info, AX_CMD_READ_PHY_ID, 0, 0, 2, buf);
-	if (ret < 0) {
-		return ret;
-	} else if (ret < 2) {
-		/* this should always return 2 bytes */
-		return -EIO;
-	}
-
-	/* Reset the PHY, and drop it into auto-negotiation mode */
-	ax_info->phy_id = buf[1];
-	ax_info->phy_state = AX_PHY_STATE_INITIALIZING;
-
-	ret = ax_write_cmd(ax_info, AX_CMD_SET_SW_MII, 0, 0, 0, &buf);
-	if (ret < 0) {
-		return ret;
-	}
-
-	*buf16 = cpu_to_le16(BMCR_RESET);
-	ret = ax_write_cmd(ax_info, AX_CMD_WRITE_MII_REG,
-			   ax_info->phy_id, MII_BMCR, 2, buf16);
-	if (ret < 0) {
-		return ret;
-	}
-
-	/* Advertise that we can do full-duplex pause */
-	*buf16 = cpu_to_le16(ADVERTISE_ALL | ADVERTISE_CSMA | 0x0400);
-	ret = ax_write_cmd(ax_info, AX_CMD_WRITE_MII_REG,
-			   ax_info->phy_id, MII_ADVERTISE, 2, buf16);
-	if (ret < 0) {
-		return ret;
-	}
-
-	*buf16 = cpu_to_le16(BMCR_ANENABLE | BMCR_ANRESTART);
-	ret = ax_write_cmd(ax_info, AX_CMD_WRITE_MII_REG,
-			   ax_info->phy_id, MII_BMCR, 2, buf16);
-	if (ret < 0) {
-		return ret;
-	}
-
-	ret = ax_write_cmd(ax_info, AX_CMD_SET_HW_MII, 0, 0, 0, &buf);
-	if (ret < 0) {
-		return ret;
-	}
-
-	net->open = ax8817x_open;
-	net->stop = ax8817x_stop;
-	net->hard_start_xmit = ax8817x_start_xmit;
-	net->tx_timeout = ax8817x_tx_timeout;
-	net->watchdog_timeo = AX_TIMEOUT_TX;
-	net->get_stats = ax8817x_stats;
-	net->do_ioctl = ax8817x_ioctl;
-	net->set_multicast_list = ax8817x_set_multicast;
-
-	return 0;
-}
-
-static void *ax8817x_bind(struct usb_device *usb, unsigned intf,
-			  const struct usb_device_id *id)
-{
-	struct ax8817x_info *ax_info;
-	struct net_device *net;
-	int i, ret;
-	unsigned long gpio_bits = id->driver_info;
-	u8 buf[2];
-
-	/* Allocate the URB lists along with the device info struct */
-	ax_info = kmalloc(sizeof(struct ax8817x_info) +
-			  n_rx_urbs * sizeof(struct urb *), GFP_KERNEL);
-	if (ax_info == NULL) {
-		err("%s: Failed ax alloc\n", __FUNCTION__);
-		goto exit_err;
-	}
-
-	memset(ax_info, 0, sizeof(struct ax8817x_info) +
-	       n_rx_urbs * sizeof(struct urb *));
-
-	ax_info->drv_state = AX_DRV_STATE_INITIALIZING;
-	ax_info->rx_urbs = (struct urb **) (ax_info + 1);
-	ax_info->usb = usb;
-
-	/* Set up the control URB queue */
-
-	INIT_LIST_HEAD(&ax_info->ctl_queue);
-	spin_lock_init(&ax_info->ctl_lock);
-	ax_info->ctl_urb = usb_alloc_urb(0);
-	if (ax_info->ctl_urb == NULL) {
-		goto exit_err_free_ax;
-	}
-
-	/* Toggle the GPIOs in a manufacturer/model specific way */
-
-	for (i = 2; i >= 0; i--) {
-		ret = ax_write_cmd(ax_info, AX_CMD_WRITE_GPIOS,
-				   (gpio_bits >> (i * 8)) & 0xff, 0, 0,
-				   buf);
-		if (ret < 0) {
-			goto exit_err_free_ax;
-		}
-		wait_ms(5);
-	}
-
-	/* Set up the net device */
-
-	net = alloc_etherdev(0);
-	if (net == NULL) {
-		err("%s: Failed net alloc\n", __FUNCTION__);
-		goto exit_err_free_ax;
-	}
-
-	ax_info->net = net;
-
-	SET_MODULE_OWNER(net);
-	net->init = ax8817x_net_init;
-	net->priv = ax_info;
-
-	ret = register_netdev(net);
-	if (ret < 0) {
-		err("%s: Failed net init (%d)\n", __FUNCTION__, ret);
-		goto exit_err_free_net;
-	}
-
-	/* Set up the interrupt URB, and start PHY state monitoring */
-
-	ax_info->int_urb = usb_alloc_urb(0);
-	if (ax_info->int_urb == NULL) {
-		goto exit_err_unregister_net;
-	}
-	ax_info->int_buf = kmalloc(8, GFP_KERNEL);
-	if (ax_info->int_buf == NULL) {
-		goto exit_err_free_int_urb;
-	}
-	ax_info->phy_req.data = kmalloc(2, GFP_KERNEL);
-	if (ax_info->phy_req.data == NULL) {
-		goto exit_err_free_int_buf;
-	}
-
-	usb_fill_int_urb(ax_info->int_urb, usb, usb_rcvintpipe(usb, 1),
-			 ax_info->int_buf, 8, ax_int_callback, ax_info,
-			 100);
-
-	ret = usb_submit_urb(ax_info->int_urb);
-	if (ret < 0) {
-		err("%s: Failed int URB submit (%d)\n", __FUNCTION__, ret);
-		goto exit_err_free_phy_buf;
-	}
-
-	ax_info->drv_state = AX_DRV_STATE_RUNNING;
-	return ax_info;
-
-      exit_err_free_phy_buf:
-	kfree(ax_info->phy_req.data);
-
-      exit_err_free_int_buf:
-	kfree(ax_info->int_buf);
-
-      exit_err_free_int_urb:
-	usb_free_urb(ax_info->int_urb);
-
-      exit_err_unregister_net:
-	ax_info->drv_state = AX_DRV_STATE_EXITING;
-	unregister_netdev(net);
-
-      exit_err_free_net:
-	kfree(net);
-
-      exit_err_free_ax:
-	if (ax_info->ctl_urb != NULL) {
-		/* no need to unlink, since there should not be any ctl URBs
-		   pending at this point */
-		usb_free_urb(ax_info->ctl_urb);
-	}
-
-	kfree(ax_info);
-
-      exit_err:
-	err("%s: Failed to initialize\n", __FUNCTION__);
-	return NULL;
-}
-
-static void ax8817x_disconnect(struct usb_device *usb, void *p)
-{
-	struct ax8817x_info *ax_info = (struct ax8817x_info *) p;
-
-	ax_info->drv_state = AX_DRV_STATE_EXITING;
-
-	if (ax_info->int_urb != NULL) {
-		usb_unlink_urb(ax_info->int_urb);
-		usb_free_urb(ax_info->int_urb);
-		kfree(ax_info->int_buf);
-	}
-
-	unregister_netdev(ax_info->net);
-
-	/* XXX: hmmm... need to go through and clear out the ctl queue, too... */
-	if (ax_info->ctl_urb != NULL) {
-		usb_unlink_urb(ax_info->ctl_urb);
-		usb_free_urb(ax_info->ctl_urb);
-	}
-
-	kfree(ax_info);
-}
-
-
-static struct usb_driver ax8817x_driver = {
-	.owner = THIS_MODULE,
-	.name = driver_name,
-	.probe = ax8817x_bind,
-	.disconnect = ax8817x_disconnect,
-	.id_table = ax8817x_id_table,
-};
-
-static int __init ax8817x_init(void)
-{
-	int ret;
-
-	if (n_rx_urbs < 1) 
-		n_rx_urbs = AX_RX_URBS_DEFAULT;
-
-	ret = usb_register(&ax8817x_driver);
-	if (ret < 0) {
-		err("%s: Failed to register\n", __FUNCTION__);
-	} else {
-		info(DRIVER_DESC " " DRIVER_VERSION);
-	}
-
-	return ret;
-}
-
-static void __exit ax8817x_exit(void)
-{
-	usb_deregister(&ax8817x_driver);
-}
-
-module_init(ax8817x_init);
-module_exit(ax8817x_exit);
-
-EXPORT_NO_SYMBOLS;

FUNET's LINUX-ADM group, linux-adm@nic.funet.fi
TCL-scripts by Sam Shen (who was at: slshen@lbl.gov)