[PATCH] USB: usbnet (3/9) module for ASIX Ethernet adapters

This patch moves the ASIX AX8817x driver into its own file, just using
the "usbnet" infrastructure as a utility library.

 - As with "cdc_subset" this involved minor Kconfig/kbuild tweaks,
   moving code from one file to another, and exporting a few functions.

 - This includes updates from Jamie Painter to add (and use) a new hook
   to handle the different maximum transfer sizes for rx and tx sides.

 - Also from Jamie, some bugfixes:
    * MDIO byteorder (to address some PPC media negotiation problems);
    * Force alignment at key spots when using ax88772 framing (on some
      embedded hardware, the network stack will break otherwise);
    * Address some link reset problems.

It also makes this driver use the standard (5 seconds vs half second)
control timeouts used elsewhere in USB; and wraps a few lines before
the 80th column (which previously needed it).

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 948 insertions, 0 deletions

diff --git a/drivers/usb/net/asix.c b/drivers/usb/net/asix.c
new file mode 100644
index 000000000000..861f00a43750
--- /dev/null
+++ b/drivers/usb/net/asix.c
@@ -0,0 +1,948 @@
+/*
+ * ASIX AX8817X based USB 2.0 Ethernet Devices
+ * Copyright (C) 2003-2005 David Hollis <dhollis@davehollis.com>
+ * Copyright (C) 2005 Phil Chang <pchang23@sbcglobal.net>
+ * Copyright (c) 2002-2003 TiVo Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+// #define	DEBUG			// error path messages, extra info
+// #define	VERBOSE			// more; success messages
+
+#include <linux/config.h>
+#ifdef	CONFIG_USB_DEBUG
+#   define DEBUG
+#endif
+#include <linux/module.h>
+#include <linux/kmod.h>
+#include <linux/sched.h>
+#include <linux/init.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/ethtool.h>
+#include <linux/workqueue.h>
+#include <linux/mii.h>
+#include <linux/usb.h>
+#include <linux/crc32.h>
+
+#include "usbnet.h"
+
+
+/* ASIX AX8817X based USB 2.0 Ethernet Devices */
+
+#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_READ_EEPROM		0x0b
+#define AX_CMD_WRITE_EEPROM		0x0c
+#define AX_CMD_WRITE_ENABLE		0x0d
+#define AX_CMD_WRITE_DISABLE		0x0e
+#define AX_CMD_WRITE_RX_CTL		0x10
+#define AX_CMD_READ_IPG012		0x11
+#define AX_CMD_WRITE_IPG0		0x12
+#define AX_CMD_WRITE_IPG1		0x13
+#define AX_CMD_WRITE_IPG2		0x14
+#define AX_CMD_WRITE_MULTI_FILTER	0x16
+#define AX_CMD_READ_NODE_ID		0x17
+#define AX_CMD_READ_PHY_ID		0x19
+#define AX_CMD_READ_MEDIUM_STATUS	0x1a
+#define AX_CMD_WRITE_MEDIUM_MODE	0x1b
+#define AX_CMD_READ_MONITOR_MODE	0x1c
+#define AX_CMD_WRITE_MONITOR_MODE	0x1d
+#define AX_CMD_WRITE_GPIOS		0x1f
+#define AX_CMD_SW_RESET			0x20
+#define AX_CMD_SW_PHY_STATUS		0x21
+#define AX_CMD_SW_PHY_SELECT		0x22
+#define AX88772_CMD_READ_NODE_ID	0x13
+
+#define AX_MONITOR_MODE			0x01
+#define AX_MONITOR_LINK			0x02
+#define AX_MONITOR_MAGIC		0x04
+#define AX_MONITOR_HSFS			0x10
+
+/* AX88172 Medium Status Register values */
+#define AX_MEDIUM_FULL_DUPLEX		0x02
+#define AX_MEDIUM_TX_ABORT_ALLOW	0x04
+#define AX_MEDIUM_FLOW_CONTROL_EN	0x10
+
+#define AX_MCAST_FILTER_SIZE		8
+#define AX_MAX_MCAST			64
+
+#define AX_EEPROM_LEN			0x40
+
+#define AX_SWRESET_CLEAR		0x00
+#define AX_SWRESET_RR			0x01
+#define AX_SWRESET_RT			0x02
+#define AX_SWRESET_PRTE			0x04
+#define AX_SWRESET_PRL			0x08
+#define AX_SWRESET_BZ			0x10
+#define AX_SWRESET_IPRL			0x20
+#define AX_SWRESET_IPPD			0x40
+
+#define AX88772_IPG0_DEFAULT		0x15
+#define AX88772_IPG1_DEFAULT		0x0c
+#define AX88772_IPG2_DEFAULT		0x12
+
+#define AX88772_MEDIUM_FULL_DUPLEX	0x0002
+#define AX88772_MEDIUM_RESERVED		0x0004
+#define AX88772_MEDIUM_RX_FC_ENABLE	0x0010
+#define AX88772_MEDIUM_TX_FC_ENABLE	0x0020
+#define AX88772_MEDIUM_PAUSE_FORMAT	0x0080
+#define AX88772_MEDIUM_RX_ENABLE	0x0100
+#define AX88772_MEDIUM_100MB		0x0200
+#define AX88772_MEDIUM_DEFAULT	\
+	(AX88772_MEDIUM_FULL_DUPLEX | AX88772_MEDIUM_RX_FC_ENABLE | \
+	 AX88772_MEDIUM_TX_FC_ENABLE | AX88772_MEDIUM_100MB | \
+	 AX88772_MEDIUM_RESERVED | AX88772_MEDIUM_RX_ENABLE )
+
+#define AX_EEPROM_MAGIC			0xdeadbeef
+
+/* This structure cannot exceed sizeof(unsigned long [5]) AKA 20 bytes */
+struct ax8817x_data {
+	u8 multi_filter[AX_MCAST_FILTER_SIZE];
+};
+
+struct ax88172_int_data {
+	u16 res1;
+	u8 link;
+	u16 res2;
+	u8 status;
+	u16 res3;
+} __attribute__ ((packed));
+
+static int ax8817x_read_cmd(struct usbnet *dev, u8 cmd, u16 value, u16 index,
+			    u16 size, void *data)
+{
+	return usb_control_msg(
+		dev->udev,
+		usb_rcvctrlpipe(dev->udev, 0),
+		cmd,
+		USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
+		value,
+		index,
+		data,
+		size,
+		USB_CTRL_GET_TIMEOUT);
+}
+
+static int ax8817x_write_cmd(struct usbnet *dev, u8 cmd, u16 value, u16 index,
+			     u16 size, void *data)
+{
+	return usb_control_msg(
+		dev->udev,
+		usb_sndctrlpipe(dev->udev, 0),
+		cmd,
+		USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
+		value,
+		index,
+		data,
+		size,
+		USB_CTRL_SET_TIMEOUT);
+}
+
+static void ax8817x_async_cmd_callback(struct urb *urb, struct pt_regs *regs)
+{
+	struct usb_ctrlrequest *req = (struct usb_ctrlrequest *)urb->context;
+
+	if (urb->status < 0)
+		printk(KERN_DEBUG "ax8817x_async_cmd_callback() failed with %d",
+			urb->status);
+
+	kfree(req);
+	usb_free_urb(urb);
+}
+
+static void ax8817x_status(struct usbnet *dev, struct urb *urb)
+{
+	struct ax88172_int_data *event;
+	int link;
+
+	if (urb->actual_length < 8)
+		return;
+
+	event = urb->transfer_buffer;
+	link = event->link & 0x01;
+	if (netif_carrier_ok(dev->net) != link) {
+		if (link) {
+			netif_carrier_on(dev->net);
+			usbnet_defer_kevent (dev, EVENT_LINK_RESET );
+		} else
+			netif_carrier_off(dev->net);
+		devdbg(dev, "ax8817x - Link Status is: %d", link);
+	}
+}
+
+static void
+ax8817x_write_cmd_async(struct usbnet *dev, u8 cmd, u16 value, u16 index,
+				    u16 size, void *data)
+{
+	struct usb_ctrlrequest *req;
+	int status;
+	struct urb *urb;
+
+	if ((urb = usb_alloc_urb(0, GFP_ATOMIC)) == NULL) {
+		devdbg(dev, "Error allocating URB in write_cmd_async!");
+		return;
+	}
+
+	if ((req = kmalloc(sizeof(struct usb_ctrlrequest), GFP_ATOMIC)) == NULL) {
+		deverr(dev, "Failed to allocate memory for control request");
+		usb_free_urb(urb);
+		return;
+	}
+
+	req->bRequestType = USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE;
+	req->bRequest = cmd;
+	req->wValue = cpu_to_le16(value);
+	req->wIndex = cpu_to_le16(index);
+	req->wLength = cpu_to_le16(size);
+
+	usb_fill_control_urb(urb, dev->udev,
+			     usb_sndctrlpipe(dev->udev, 0),
+			     (void *)req, data, size,
+			     ax8817x_async_cmd_callback, req);
+
+	if((status = usb_submit_urb(urb, GFP_ATOMIC)) < 0) {
+		deverr(dev, "Error submitting the control message: status=%d",
+				status);
+		kfree(req);
+		usb_free_urb(urb);
+	}
+}
+
+static void ax8817x_set_multicast(struct net_device *net)
+{
+	struct usbnet *dev = netdev_priv(net);
+	struct ax8817x_data *data = (struct ax8817x_data *)&dev->data;
+	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 {
+		/* We use the 20 byte dev->data
+		 * for our 8 byte filter buffer
+		 * to avoid allocating memory that
+		 * is tricky to free later */
+		struct dev_mc_list *mc_list = net->mc_list;
+		u32 crc_bits;
+		int i;
+
+		memset(data->multi_filter, 0, AX_MCAST_FILTER_SIZE);
+
+		/* Build the multicast hash filter. */
+		for (i = 0; i < net->mc_count; i++) {
+			crc_bits =
+			    ether_crc(ETH_ALEN,
+				      mc_list->dmi_addr) >> 26;
+			data->multi_filter[crc_bits >> 3] |=
+			    1 << (crc_bits & 7);
+			mc_list = mc_list->next;
+		}
+
+		ax8817x_write_cmd_async(dev, AX_CMD_WRITE_MULTI_FILTER, 0, 0,
+				   AX_MCAST_FILTER_SIZE, data->multi_filter);
+
+		rx_ctl |= 0x10;
+	}
+
+	ax8817x_write_cmd_async(dev, AX_CMD_WRITE_RX_CTL, rx_ctl, 0, 0, NULL);
+}
+
+static int ax8817x_mdio_read(struct net_device *netdev, int phy_id, int loc)
+{
+	struct usbnet *dev = netdev_priv(netdev);
+	u16 res;
+	u8 buf[1];
+
+	ax8817x_write_cmd(dev, AX_CMD_SET_SW_MII, 0, 0, 0, &buf);
+	ax8817x_read_cmd(dev, AX_CMD_READ_MII_REG, phy_id,
+				(__u16)loc, 2, (u16 *)&res);
+	ax8817x_write_cmd(dev, AX_CMD_SET_HW_MII, 0, 0, 0, &buf);
+
+	return res & 0xffff;
+}
+
+/* same as above, but converts resulting value to cpu byte order */
+static int ax8817x_mdio_read_le(struct net_device *netdev, int phy_id, int loc)
+{
+	return le16_to_cpu(ax8817x_mdio_read(netdev,phy_id, loc));
+}
+
+static void
+ax8817x_mdio_write(struct net_device *netdev, int phy_id, int loc, int val)
+{
+	struct usbnet *dev = netdev_priv(netdev);
+	u16 res = val;
+	u8 buf[1];
+
+	ax8817x_write_cmd(dev, AX_CMD_SET_SW_MII, 0, 0, 0, &buf);
+	ax8817x_write_cmd(dev, AX_CMD_WRITE_MII_REG, phy_id,
+				(__u16)loc, 2, (u16 *)&res);
+	ax8817x_write_cmd(dev, AX_CMD_SET_HW_MII, 0, 0, 0, &buf);
+}
+
+/* same as above, but converts new value to le16 byte order before writing */
+static void
+ax8817x_mdio_write_le(struct net_device *netdev, int phy_id, int loc, int val)
+{
+	ax8817x_mdio_write( netdev, phy_id, loc, cpu_to_le16(val) );
+}
+
+static int ax88172_link_reset(struct usbnet *dev)
+{
+	u16 lpa;
+	u16 adv;
+	u16 res;
+	u8 mode;
+
+	mode = AX_MEDIUM_TX_ABORT_ALLOW | AX_MEDIUM_FLOW_CONTROL_EN;
+	lpa = ax8817x_mdio_read_le(dev->net, dev->mii.phy_id, MII_LPA);
+	adv = ax8817x_mdio_read_le(dev->net, dev->mii.phy_id, MII_ADVERTISE);
+	res = mii_nway_result(lpa|adv);
+	if (res & LPA_DUPLEX)
+		mode |= AX_MEDIUM_FULL_DUPLEX;
+	ax8817x_write_cmd(dev, AX_CMD_WRITE_MEDIUM_MODE, mode, 0, 0, NULL);
+
+	return 0;
+}
+
+static void
+ax8817x_get_wol(struct net_device *net, struct ethtool_wolinfo *wolinfo)
+{
+	struct usbnet *dev = netdev_priv(net);
+	u8 opt;
+
+	if (ax8817x_read_cmd(dev, AX_CMD_READ_MONITOR_MODE, 0, 0, 1, &opt) < 0) {
+		wolinfo->supported = 0;
+		wolinfo->wolopts = 0;
+		return;
+	}
+	wolinfo->supported = WAKE_PHY | WAKE_MAGIC;
+	wolinfo->wolopts = 0;
+	if (opt & AX_MONITOR_MODE) {
+		if (opt & AX_MONITOR_LINK)
+			wolinfo->wolopts |= WAKE_PHY;
+		if (opt & AX_MONITOR_MAGIC)
+			wolinfo->wolopts |= WAKE_MAGIC;
+	}
+}
+
+static int
+ax8817x_set_wol(struct net_device *net, struct ethtool_wolinfo *wolinfo)
+{
+	struct usbnet *dev = netdev_priv(net);
+	u8 opt = 0;
+	u8 buf[1];
+
+	if (wolinfo->wolopts & WAKE_PHY)
+		opt |= AX_MONITOR_LINK;
+	if (wolinfo->wolopts & WAKE_MAGIC)
+		opt |= AX_MONITOR_MAGIC;
+	if (opt != 0)
+		opt |= AX_MONITOR_MODE;
+
+	if (ax8817x_write_cmd(dev, AX_CMD_WRITE_MONITOR_MODE,
+			      opt, 0, 0, &buf) < 0)
+		return -EINVAL;
+
+	return 0;
+}
+
+static int ax8817x_get_eeprom_len(struct net_device *net)
+{
+	return AX_EEPROM_LEN;
+}
+
+static int ax8817x_get_eeprom(struct net_device *net,
+			      struct ethtool_eeprom *eeprom, u8 *data)
+{
+	struct usbnet *dev = netdev_priv(net);
+	u16 *ebuf = (u16 *)data;
+	int i;
+
+	/* Crude hack to ensure that we don't overwrite memory
+	 * if an odd length is supplied
+	 */
+	if (eeprom->len % 2)
+		return -EINVAL;
+
+	eeprom->magic = AX_EEPROM_MAGIC;
+
+	/* ax8817x returns 2 bytes from eeprom on read */
+	for (i=0; i < eeprom->len / 2; i++) {
+		if (ax8817x_read_cmd(dev, AX_CMD_READ_EEPROM,
+			eeprom->offset + i, 0, 2, &ebuf[i]) < 0)
+			return -EINVAL;
+	}
+	return 0;
+}
+
+static void ax8817x_get_drvinfo (struct net_device *net,
+				 struct ethtool_drvinfo *info)
+{
+	/* Inherit standard device info */
+	usbnet_get_drvinfo(net, info);
+	info->eedump_len = 0x3e;
+}
+
+static int ax8817x_get_settings(struct net_device *net, struct ethtool_cmd *cmd)
+{
+	struct usbnet *dev = netdev_priv(net);
+
+	return mii_ethtool_gset(&dev->mii,cmd);
+}
+
+static int ax8817x_set_settings(struct net_device *net, struct ethtool_cmd *cmd)
+{
+	struct usbnet *dev = netdev_priv(net);
+
+	return mii_ethtool_sset(&dev->mii,cmd);
+}
+
+/* We need to override some ethtool_ops so we require our
+   own structure so we don't interfere with other usbnet
+   devices that may be connected at the same time. */
+static struct ethtool_ops ax8817x_ethtool_ops = {
+	.get_drvinfo		= ax8817x_get_drvinfo,
+	.get_link		= ethtool_op_get_link,
+	.get_msglevel		= usbnet_get_msglevel,
+	.set_msglevel		= usbnet_set_msglevel,
+	.get_wol		= ax8817x_get_wol,
+	.set_wol		= ax8817x_set_wol,
+	.get_eeprom_len		= ax8817x_get_eeprom_len,
+	.get_eeprom		= ax8817x_get_eeprom,
+	.get_settings		= ax8817x_get_settings,
+	.set_settings		= ax8817x_set_settings,
+};
+
+static int ax8817x_ioctl (struct net_device *net, struct ifreq *rq, int cmd)
+{
+	struct usbnet *dev = netdev_priv(net);
+
+	return generic_mii_ioctl(&dev->mii, if_mii(rq), cmd, NULL);
+}
+
+static int ax8817x_bind(struct usbnet *dev, struct usb_interface *intf)
+{
+	int ret = 0;
+	void *buf;
+	int i;
+	unsigned long gpio_bits = dev->driver_info->data;
+
+	usbnet_get_endpoints(dev,intf);
+
+	buf = kmalloc(ETH_ALEN, GFP_KERNEL);
+	if(!buf) {
+		ret = -ENOMEM;
+		goto out1;
+	}
+
+	/* Toggle the GPIOs in a manufacturer/model specific way */
+	for (i = 2; i >= 0; i--) {
+		if ((ret = ax8817x_write_cmd(dev, AX_CMD_WRITE_GPIOS,
+					(gpio_bits >> (i * 8)) & 0xff, 0, 0,
+					buf)) < 0)
+			goto out2;
+		msleep(5);
+	}
+
+	if ((ret = ax8817x_write_cmd(dev, AX_CMD_WRITE_RX_CTL,
+				0x80, 0, 0, buf)) < 0) {
+		dbg("send AX_CMD_WRITE_RX_CTL failed: %d", ret);
+		goto out2;
+	}
+
+	/* Get the MAC address */
+	memset(buf, 0, ETH_ALEN);
+	if ((ret = ax8817x_read_cmd(dev, AX_CMD_READ_NODE_ID,
+				0, 0, 6, buf)) < 0) {
+		dbg("read AX_CMD_READ_NODE_ID failed: %d", ret);
+		goto out2;
+	}
+	memcpy(dev->net->dev_addr, buf, ETH_ALEN);
+
+	/* Get the PHY id */
+	if ((ret = ax8817x_read_cmd(dev, AX_CMD_READ_PHY_ID,
+				0, 0, 2, buf)) < 0) {
+		dbg("error on read AX_CMD_READ_PHY_ID: %02x", ret);
+		goto out2;
+	} else if (ret < 2) {
+		/* this should always return 2 bytes */
+		dbg("AX_CMD_READ_PHY_ID returned less than 2 bytes: ret=%02x",
+				ret);
+		ret = -EIO;
+		goto out2;
+	}
+
+	/* Initialize MII structure */
+	dev->mii.dev = dev->net;
+	dev->mii.mdio_read = ax8817x_mdio_read;
+	dev->mii.mdio_write = ax8817x_mdio_write;
+	dev->mii.phy_id_mask = 0x3f;
+	dev->mii.reg_num_mask = 0x1f;
+	dev->mii.phy_id = *((u8 *)buf + 1);
+	dev->net->do_ioctl = ax8817x_ioctl;
+
+	dev->net->set_multicast_list = ax8817x_set_multicast;
+	dev->net->ethtool_ops = &ax8817x_ethtool_ops;
+
+	ax8817x_mdio_write_le(dev->net, dev->mii.phy_id, MII_BMCR, BMCR_RESET);
+	ax8817x_mdio_write_le(dev->net, dev->mii.phy_id, MII_ADVERTISE,
+		ADVERTISE_ALL | ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP);
+	mii_nway_restart(&dev->mii);
+
+	return 0;
+out2:
+	kfree(buf);
+out1:
+	return ret;
+}
+
+static struct ethtool_ops ax88772_ethtool_ops = {
+	.get_drvinfo		= ax8817x_get_drvinfo,
+	.get_link		= ethtool_op_get_link,
+	.get_msglevel		= usbnet_get_msglevel,
+	.set_msglevel		= usbnet_set_msglevel,
+	.get_wol		= ax8817x_get_wol,
+	.set_wol		= ax8817x_set_wol,
+	.get_eeprom_len		= ax8817x_get_eeprom_len,
+	.get_eeprom		= ax8817x_get_eeprom,
+	.get_settings		= ax8817x_get_settings,
+	.set_settings		= ax8817x_set_settings,
+};
+
+static int ax88772_bind(struct usbnet *dev, struct usb_interface *intf)
+{
+	int ret;
+	void *buf;
+
+	usbnet_get_endpoints(dev,intf);
+
+	buf = kmalloc(6, GFP_KERNEL);
+	if(!buf) {
+		dbg ("Cannot allocate memory for buffer");
+		ret = -ENOMEM;
+		goto out1;
+	}
+
+	if ((ret = ax8817x_write_cmd(dev, AX_CMD_WRITE_GPIOS,
+				     0x00B0, 0, 0, buf)) < 0)
+		goto out2;
+
+	msleep(5);
+	if ((ret = ax8817x_write_cmd(dev, AX_CMD_SW_PHY_SELECT,
+				0x0001, 0, 0, buf)) < 0) {
+		dbg("Select PHY #1 failed: %d", ret);
+		goto out2;
+	}
+
+	if ((ret = ax8817x_write_cmd(dev, AX_CMD_SW_RESET, AX_SWRESET_IPPD,
+				0, 0, buf)) < 0) {
+		dbg("Failed to power down internal PHY: %d", ret);
+		goto out2;
+	}
+
+	msleep(150);
+	if ((ret = ax8817x_write_cmd(dev, AX_CMD_SW_RESET, AX_SWRESET_CLEAR,
+				0, 0, buf)) < 0) {
+		dbg("Failed to perform software reset: %d", ret);
+		goto out2;
+	}
+
+	msleep(150);
+	if ((ret = ax8817x_write_cmd(dev, AX_CMD_SW_RESET,
+	     			AX_SWRESET_IPRL | AX_SWRESET_PRL,
+				0, 0, buf)) < 0) {
+		dbg("Failed to set Internal/External PHY reset control: %d",
+					ret);
+		goto out2;
+	}
+
+	msleep(150);
+	if ((ret = ax8817x_write_cmd(dev, AX_CMD_WRITE_RX_CTL,
+				0x0000, 0, 0, buf)) < 0) {
+		dbg("Failed to reset RX_CTL: %d", ret);
+		goto out2;
+	}
+
+	/* Get the MAC address */
+	memset(buf, 0, ETH_ALEN);
+	if ((ret = ax8817x_read_cmd(dev, AX88772_CMD_READ_NODE_ID,
+				0, 0, ETH_ALEN, buf)) < 0) {
+		dbg("Failed to read MAC address: %d", ret);
+		goto out2;
+	}
+	memcpy(dev->net->dev_addr, buf, ETH_ALEN);
+
+	if ((ret = ax8817x_write_cmd(dev, AX_CMD_SET_SW_MII,
+				0, 0, 0, buf)) < 0) {
+		dbg("Enabling software MII failed: %d", ret);
+		goto out2;
+	}
+
+	if (((ret = ax8817x_read_cmd(dev, AX_CMD_READ_MII_REG,
+	      			0x0010, 2, 2, buf)) < 0)
+			|| (*((u16 *)buf) != 0x003b)) {
+		dbg("Read PHY register 2 must be 0x3b00: %d", ret);
+		goto out2;
+	}
+
+	/* Initialize MII structure */
+	dev->mii.dev = dev->net;
+	dev->mii.mdio_read = ax8817x_mdio_read;
+	dev->mii.mdio_write = ax8817x_mdio_write;
+	dev->mii.phy_id_mask = 0xff;
+	dev->mii.reg_num_mask = 0xff;
+	dev->net->do_ioctl = ax8817x_ioctl;
+
+	/* Get the PHY id */
+	if ((ret = ax8817x_read_cmd(dev, AX_CMD_READ_PHY_ID,
+			0, 0, 2, buf)) < 0) {
+		dbg("Error reading PHY ID: %02x", ret);
+		goto out2;
+	} else if (ret < 2) {
+		/* this should always return 2 bytes */
+		dbg("AX_CMD_READ_PHY_ID returned less than 2 bytes: ret=%02x",
+		    ret);
+		ret = -EIO;
+		goto out2;
+	}
+	dev->mii.phy_id = *((u8 *)buf + 1);
+
+	if ((ret = ax8817x_write_cmd(dev, AX_CMD_SW_RESET, AX_SWRESET_PRL,
+				0, 0, buf)) < 0) {
+		dbg("Set external PHY reset pin level: %d", ret);
+		goto out2;
+	}
+	msleep(150);
+	if ((ret = ax8817x_write_cmd(dev, AX_CMD_SW_RESET,
+	     			AX_SWRESET_IPRL | AX_SWRESET_PRL,
+				0, 0, buf)) < 0) {
+		dbg("Set Internal/External PHY reset control: %d", ret);
+		goto out2;
+	}
+	msleep(150);
+
+
+	dev->net->set_multicast_list = ax8817x_set_multicast;
+	dev->net->ethtool_ops = &ax88772_ethtool_ops;
+
+	ax8817x_mdio_write_le(dev->net, dev->mii.phy_id, MII_BMCR, BMCR_RESET);
+	ax8817x_mdio_write_le(dev->net, dev->mii.phy_id, MII_ADVERTISE,
+			ADVERTISE_ALL | ADVERTISE_CSMA);
+	mii_nway_restart(&dev->mii);
+
+	if ((ret = ax8817x_write_cmd(dev, AX_CMD_WRITE_MEDIUM_MODE,
+				AX88772_MEDIUM_DEFAULT, 0, 0, buf)) < 0) {
+		dbg("Write medium mode register: %d", ret);
+		goto out2;
+	}
+
+	if ((ret = ax8817x_write_cmd(dev, AX_CMD_WRITE_IPG0,
+				AX88772_IPG0_DEFAULT | AX88772_IPG1_DEFAULT,
+				AX88772_IPG2_DEFAULT, 0, buf)) < 0) {
+		dbg("Write IPG,IPG1,IPG2 failed: %d", ret);
+		goto out2;
+	}
+	if ((ret =
+	     ax8817x_write_cmd(dev, AX_CMD_SET_HW_MII, 0, 0, 0, &buf)) < 0) {
+		dbg("Failed to set hardware MII: %02x", ret);
+		goto out2;
+	}
+
+	/* Set RX_CTL to default values with 2k buffer, and enable cactus */
+	if ((ret =
+	     ax8817x_write_cmd(dev, AX_CMD_WRITE_RX_CTL, 0x0088, 0, 0,
+			       buf)) < 0) {
+		dbg("Reset RX_CTL failed: %d", ret);
+		goto out2;
+	}
+
+	kfree(buf);
+
+	/* Asix framing packs multiple eth frames into a 2K usb bulk transfer */
+	if (dev->driver_info->flags & FLAG_FRAMING_AX) {
+		/* hard_mtu  is still the default - the device does not support
+		   jumbo eth frames */
+		dev->rx_urb_size = 2048;
+	}
+
+	return 0;
+
+out2:
+	kfree(buf);
+out1:
+	return ret;
+}
+
+static int ax88772_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
+{
+	u8  *head;
+	u32  header;
+	char *packet;
+	struct sk_buff *ax_skb;
+	u16 size;
+
+	head = (u8 *) skb->data;
+	memcpy(&header, head, sizeof(header));
+	le32_to_cpus(&header);
+	packet = head + sizeof(header);
+
+	skb_pull(skb, 4);
+
+	while (skb->len > 0) {
+		if ((short)(header & 0x0000ffff) !=
+		    ~((short)((header & 0xffff0000) >> 16))) {
+			devdbg(dev,"header length data is error");
+		}
+		/* get the packet length */
+		size = (u16) (header & 0x0000ffff);
+
+		if ((skb->len) - ((size + 1) & 0xfffe) == 0)
+			return 2;
+		if (size > ETH_FRAME_LEN) {
+			devdbg(dev,"invalid rx length %d", size);
+			return 0;
+		}
+		ax_skb = skb_clone(skb, GFP_ATOMIC);
+		if (ax_skb) {
+			ax_skb->len = size;
+			ax_skb->data = packet;
+			ax_skb->tail = packet + size;
+			usbnet_skb_return(dev, ax_skb);
+		} else {
+			return 0;
+		}
+
+		skb_pull(skb, (size + 1) & 0xfffe);
+
+		if (skb->len == 0)
+			break;
+
+		head = (u8 *) skb->data;
+		memcpy(&header, head, sizeof(header));
+		le32_to_cpus(&header);
+		packet = head + sizeof(header);
+		skb_pull(skb, 4);
+	}
+
+	if (skb->len < 0) {
+		devdbg(dev,"invalid rx length %d", skb->len);
+		return 0;
+	}
+	return 1;
+}
+
+static struct sk_buff *ax88772_tx_fixup(struct usbnet *dev, struct sk_buff *skb,
+					unsigned flags)
+{
+	int padlen;
+	int headroom = skb_headroom(skb);
+	int tailroom = skb_tailroom(skb);
+	u32 packet_len;
+	u32 padbytes = 0xffff0000;
+
+	padlen = ((skb->len + 4) % 512) ? 0 : 4;
+
+	if ((!skb_cloned(skb))
+	    && ((headroom + tailroom) >= (4 + padlen))) {
+		if ((headroom < 4) || (tailroom < padlen)) {
+			skb->data = memmove(skb->head + 4, skb->data, skb->len);
+			skb->tail = skb->data + skb->len;
+		}
+	} else {
+		struct sk_buff *skb2;
+		skb2 = skb_copy_expand(skb, 4, padlen, flags);
+		dev_kfree_skb_any(skb);
+		skb = skb2;
+		if (!skb)
+			return NULL;
+	}
+
+	skb_push(skb, 4);
+	packet_len = (((skb->len - 4) ^ 0x0000ffff) << 16) + (skb->len - 4);
+	memcpy(skb->data, &packet_len, sizeof(packet_len));
+
+	if ((skb->len % 512) == 0) {
+		memcpy( skb->tail, &padbytes, sizeof(padbytes));
+		skb_put(skb, sizeof(padbytes));
+	}
+	return skb;
+}
+
+static int ax88772_link_reset(struct usbnet *dev)
+{
+	u16 lpa;
+	u16 adv;
+	u16 res;
+	u16 mode;
+
+	mode = AX88772_MEDIUM_DEFAULT;
+	lpa = ax8817x_mdio_read_le(dev->net, dev->mii.phy_id, MII_LPA);
+	adv = ax8817x_mdio_read_le(dev->net, dev->mii.phy_id, MII_ADVERTISE);
+	res = mii_nway_result(lpa|adv);
+
+	if ((res & LPA_DUPLEX) == 0)
+		mode &= ~AX88772_MEDIUM_FULL_DUPLEX;
+	if ((res & LPA_100) == 0)
+		mode &= ~AX88772_MEDIUM_100MB;
+	ax8817x_write_cmd(dev, AX_CMD_WRITE_MEDIUM_MODE, mode, 0, 0, NULL);
+
+	return 0;
+}
+
+static const struct driver_info ax8817x_info = {
+	.description = "ASIX AX8817x USB 2.0 Ethernet",
+	.bind = ax8817x_bind,
+	.status = ax8817x_status,
+	.link_reset = ax88172_link_reset,
+	.reset = ax88172_link_reset,
+	.flags =  FLAG_ETHER,
+	.data = 0x00130103,
+};
+
+static const struct driver_info dlink_dub_e100_info = {
+	.description = "DLink DUB-E100 USB Ethernet",
+	.bind = ax8817x_bind,
+	.status = ax8817x_status,
+	.link_reset = ax88172_link_reset,
+	.reset = ax88172_link_reset,
+	.flags =  FLAG_ETHER,
+	.data = 0x009f9d9f,
+};
+
+static const struct driver_info netgear_fa120_info = {
+	.description = "Netgear FA-120 USB Ethernet",
+	.bind = ax8817x_bind,
+	.status = ax8817x_status,
+	.link_reset = ax88172_link_reset,
+	.reset = ax88172_link_reset,
+	.flags =  FLAG_ETHER,
+	.data = 0x00130103,
+};
+
+static const struct driver_info hawking_uf200_info = {
+	.description = "Hawking UF200 USB Ethernet",
+	.bind = ax8817x_bind,
+	.status = ax8817x_status,
+	.link_reset = ax88172_link_reset,
+	.reset = ax88172_link_reset,
+	.flags =  FLAG_ETHER,
+	.data = 0x001f1d1f,
+};
+
+static const struct driver_info ax88772_info = {
+	.description = "ASIX AX88772 USB 2.0 Ethernet",
+	.bind = ax88772_bind,
+	.status = ax8817x_status,
+	.link_reset = ax88772_link_reset,
+	.reset = ax88772_link_reset,
+	.flags = FLAG_ETHER | FLAG_FRAMING_AX,
+	.rx_fixup = ax88772_rx_fixup,
+	.tx_fixup = ax88772_tx_fixup,
+	.data = 0x00130103,
+};
+
+static const struct usb_device_id	products [] = {
+{
+	// Linksys USB200M
+	USB_DEVICE (0x077b, 0x2226),
+	.driver_info =	(unsigned long) &ax8817x_info,
+}, {
+	// Netgear FA120
+	USB_DEVICE (0x0846, 0x1040),
+	.driver_info =  (unsigned long) &netgear_fa120_info,
+}, {
+	// DLink DUB-E100
+	USB_DEVICE (0x2001, 0x1a00),
+	.driver_info =  (unsigned long) &dlink_dub_e100_info,
+}, {
+	// Intellinet, ST Lab USB Ethernet
+	USB_DEVICE (0x0b95, 0x1720),
+	.driver_info =  (unsigned long) &ax8817x_info,
+}, {
+	// Hawking UF200, TrendNet TU2-ET100
+	USB_DEVICE (0x07b8, 0x420a),
+	.driver_info =  (unsigned long) &hawking_uf200_info,
+}, {
+        // Billionton Systems, USB2AR
+        USB_DEVICE (0x08dd, 0x90ff),
+        .driver_info =  (unsigned long) &ax8817x_info,
+}, {
+	// ATEN UC210T
+	USB_DEVICE (0x0557, 0x2009),
+	.driver_info =  (unsigned long) &ax8817x_info,
+}, {
+	// Buffalo LUA-U2-KTX
+	USB_DEVICE (0x0411, 0x003d),
+	.driver_info =  (unsigned long) &ax8817x_info,
+}, {
+	// Sitecom LN-029 "USB 2.0 10/100 Ethernet adapter"
+	USB_DEVICE (0x6189, 0x182d),
+	.driver_info =  (unsigned long) &ax8817x_info,
+}, {
+	// corega FEther USB2-TX
+	USB_DEVICE (0x07aa, 0x0017),
+	.driver_info =  (unsigned long) &ax8817x_info,
+}, {
+	// Surecom EP-1427X-2
+	USB_DEVICE (0x1189, 0x0893),
+	.driver_info = (unsigned long) &ax8817x_info,
+}, {
+	// goodway corp usb gwusb2e
+	USB_DEVICE (0x1631, 0x6200),
+	.driver_info = (unsigned long) &ax8817x_info,
+}, {
+	// ASIX AX88772 10/100
+        USB_DEVICE (0x0b95, 0x7720),
+        .driver_info = (unsigned long) &ax88772_info,
+},
+	{ },		// END
+};
+MODULE_DEVICE_TABLE(usb, products);
+
+static struct usb_driver asix_driver = {
+	.owner =	THIS_MODULE,
+	.name =		"asix",
+	.id_table =	products,
+	.probe =	usbnet_probe,
+	.suspend =	usbnet_suspend,
+	.resume =	usbnet_resume,
+	.disconnect =	usbnet_disconnect,
+};
+
+static int __init asix_init(void)
+{
+ 	return usb_register(&asix_driver);
+}
+module_init(asix_init);
+
+static void __exit asix_exit(void)
+{
+ 	usb_deregister(&asix_driver);
+}
+module_exit(asix_exit);
+
+MODULE_AUTHOR("David Hollis");
+MODULE_DESCRIPTION("ASIX AX8817X based USB 2.0 Ethernet Devices");
+MODULE_LICENSE("GPL");
+