drivers/net/usb/ax88172a.c - kernel/msm-4.9 - Gitiles

 /*
  * ASIX AX88172A based USB 2.0 Ethernet Devices
  * Copyright (C) 2012 OMICRON electronics GmbH
  *
  * Supports external PHYs via phylib. Based on the driver for the
  * AX88772. Original copyrights follow:
  *
  * Copyright (C) 2003-2006 David Hollis <dhollis@davehollis.com>
  * Copyright (C) 2005 Phil Chang <pchang23@sbcglobal.net>
  * Copyright (C) 2006 James Painter <jamie.painter@iname.com>
  * 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
  */

 #include "asix.h"
 #include <linux/phy.h>

 struct ax88172a_private {
 	struct mii_bus *mdio;
 	struct phy_device *phydev;
 	char phy_name[20];
 	u16 phy_addr;
 	u16 oldmode;
 	int use_embdphy;
 	struct asix_rx_fixup_info rx_fixup_info;
 };

 /* MDIO read and write wrappers for phylib */
 static int asix_mdio_bus_read(struct mii_bus *bus, int phy_id, int regnum)
 {
 	return asix_mdio_read(((struct usbnet *)bus->priv)->net, phy_id,
 			      regnum);
 }

 static int asix_mdio_bus_write(struct mii_bus *bus, int phy_id, int regnum,
 			       u16 val)
 {
 	asix_mdio_write(((struct usbnet *)bus->priv)->net, phy_id, regnum, val);
 	return 0;
 }

 static int ax88172a_ioctl(struct net_device *net, struct ifreq *rq, int cmd)
 {
 	if (!netif_running(net))
 		return -EINVAL;

 	if (!net->phydev)
 		return -ENODEV;

 	return phy_mii_ioctl(net->phydev, rq, cmd);
 }

 /* set MAC link settings according to information from phylib */
 static void ax88172a_adjust_link(struct net_device *netdev)
 {
 	struct phy_device *phydev = netdev->phydev;
 	struct usbnet *dev = netdev_priv(netdev);
 	struct ax88172a_private *priv = dev->driver_priv;
 	u16 mode = 0;

 	if (phydev->link) {
 		mode = AX88772_MEDIUM_DEFAULT;

 		if (phydev->duplex == DUPLEX_HALF)
 			mode &= ~AX_MEDIUM_FD;

 		if (phydev->speed != SPEED_100)
 			mode &= ~AX_MEDIUM_PS;
 	}

 	if (mode != priv->oldmode) {
 		asix_write_medium_mode(dev, mode);
 		priv->oldmode = mode;
 		netdev_dbg(netdev, "speed %u duplex %d, setting mode to 0x%04x\n",
 			   phydev->speed, phydev->duplex, mode);
 		phy_print_status(phydev);
 	}
 }

 static void ax88172a_status(struct usbnet *dev, struct urb *urb)
 {
 	/* link changes are detected by polling the phy */
 }

 /* use phylib infrastructure */
 static int ax88172a_init_mdio(struct usbnet *dev)
 {
 	struct ax88172a_private *priv = dev->driver_priv;
 	int ret, i;

 	priv->mdio = mdiobus_alloc();
 	if (!priv->mdio) {
 		netdev_err(dev->net, "Could not allocate MDIO bus\n");
 		return -ENOMEM;
 	}

 	priv->mdio->priv = (void *)dev;
 	priv->mdio->read = &asix_mdio_bus_read;
 	priv->mdio->write = &asix_mdio_bus_write;
 	priv->mdio->name = "Asix MDIO Bus";
 	/* mii bus name is usb-<usb bus number>-<usb device number> */
 	snprintf(priv->mdio->id, MII_BUS_ID_SIZE, "usb-%03d:%03d",
 		 dev->udev->bus->busnum, dev->udev->devnum);

 	priv->mdio->irq = kzalloc(sizeof(int) * PHY_MAX_ADDR, GFP_KERNEL);
 	if (!priv->mdio->irq) {
 		ret = -ENOMEM;
 		goto mfree;
 	}
 	for (i = 0; i < PHY_MAX_ADDR; i++)
 		priv->mdio->irq[i] = PHY_POLL;

 	ret = mdiobus_register(priv->mdio);
 	if (ret) {
 		netdev_err(dev->net, "Could not register MDIO bus\n");
 		goto ifree;
 	}

 	netdev_info(dev->net, "registered mdio bus %s\n", priv->mdio->id);
 	return 0;

 ifree:
 	kfree(priv->mdio->irq);
 mfree:
 	mdiobus_free(priv->mdio);
 	return ret;
 }

 static void ax88172a_remove_mdio(struct usbnet *dev)
 {
 	struct ax88172a_private *priv = dev->driver_priv;

 	netdev_info(dev->net, "deregistering mdio bus %s\n", priv->mdio->id);
 	mdiobus_unregister(priv->mdio);
 	kfree(priv->mdio->irq);
 	mdiobus_free(priv->mdio);
 }

 static const struct net_device_ops ax88172a_netdev_ops = {
 	.ndo_open		= usbnet_open,
 	.ndo_stop		= usbnet_stop,
 	.ndo_start_xmit		= usbnet_start_xmit,
 	.ndo_tx_timeout		= usbnet_tx_timeout,
 	.ndo_change_mtu		= usbnet_change_mtu,
 	.ndo_set_mac_address	= asix_set_mac_address,
 	.ndo_validate_addr	= eth_validate_addr,
 	.ndo_do_ioctl		= ax88172a_ioctl,
 	.ndo_set_rx_mode        = asix_set_multicast,
 };

 static int ax88172a_get_settings(struct net_device *net,
 				 struct ethtool_cmd *cmd)
 {
 	if (!net->phydev)
 		return -ENODEV;

 	return phy_ethtool_gset(net->phydev, cmd);
 }

 static int ax88172a_set_settings(struct net_device *net,
 				 struct ethtool_cmd *cmd)
 {
 	if (!net->phydev)
 		return -ENODEV;

 	return phy_ethtool_sset(net->phydev, cmd);
 }

 static int ax88172a_nway_reset(struct net_device *net)
 {
 	if (!net->phydev)
 		return -ENODEV;

 	return phy_start_aneg(net->phydev);
 }

 static const struct ethtool_ops ax88172a_ethtool_ops = {
 	.get_drvinfo		= asix_get_drvinfo,
 	.get_link		= usbnet_get_link,
 	.get_msglevel		= usbnet_get_msglevel,
 	.set_msglevel		= usbnet_set_msglevel,
 	.get_wol		= asix_get_wol,
 	.set_wol		= asix_set_wol,
 	.get_eeprom_len		= asix_get_eeprom_len,
 	.get_eeprom		= asix_get_eeprom,
 	.set_eeprom		= asix_set_eeprom,
 	.get_settings		= ax88172a_get_settings,
 	.set_settings		= ax88172a_set_settings,
 	.nway_reset		= ax88172a_nway_reset,
 };

 static int ax88172a_reset_phy(struct usbnet *dev, int embd_phy)
 {
 	int ret;

 	ret = asix_sw_reset(dev, AX_SWRESET_IPPD);
 	if (ret < 0)
 		goto err;

 	msleep(150);
 	ret = asix_sw_reset(dev, AX_SWRESET_CLEAR);
 	if (ret < 0)
 		goto err;

 	msleep(150);

 	ret = asix_sw_reset(dev, embd_phy ? AX_SWRESET_IPRL : AX_SWRESET_IPPD);
 	if (ret < 0)
 		goto err;

 	return 0;

 err:
 	return ret;
 }


 static int ax88172a_bind(struct usbnet *dev, struct usb_interface *intf)
 {
 	int ret;
 	u8 buf[ETH_ALEN];
 	struct ax88172a_private *priv;

 	usbnet_get_endpoints(dev, intf);

 	priv = kzalloc(sizeof(*priv), GFP_KERNEL);
 	if (!priv)
 		return -ENOMEM;

 	dev->driver_priv = priv;

 	/* Get the MAC address */
 	ret = asix_read_cmd(dev, AX_CMD_READ_NODE_ID, 0, 0, ETH_ALEN, buf);
 	if (ret < 0) {
 		netdev_err(dev->net, "Failed to read MAC address: %d\n", ret);
 		goto free;
 	}
 	memcpy(dev->net->dev_addr, buf, ETH_ALEN);

 	dev->net->netdev_ops = &ax88172a_netdev_ops;
 	dev->net->ethtool_ops = &ax88172a_ethtool_ops;

 	/* are we using the internal or the external phy? */
 	ret = asix_read_cmd(dev, AX_CMD_SW_PHY_STATUS, 0, 0, 1, buf);
 	if (ret < 0) {
 		netdev_err(dev->net, "Failed to read software interface selection register: %d\n",
 			   ret);
 		goto free;
 	}

 	netdev_dbg(dev->net, "AX_CMD_SW_PHY_STATUS = 0x%02x\n", buf[0]);
 	switch (buf[0] & AX_PHY_SELECT_MASK) {
 	case AX_PHY_SELECT_INTERNAL:
 		netdev_dbg(dev->net, "use internal phy\n");
 		priv->use_embdphy = 1;
 		break;
 	case AX_PHY_SELECT_EXTERNAL:
 		netdev_dbg(dev->net, "use external phy\n");
 		priv->use_embdphy = 0;
 		break;
 	default:
 		netdev_err(dev->net, "Interface mode not supported by driver\n");
 		ret = -ENOTSUPP;
 		goto free;
 	}

 	priv->phy_addr = asix_read_phy_addr(dev, priv->use_embdphy);
 	ax88172a_reset_phy(dev, priv->use_embdphy);

 	/* 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;
 	}

 	/* init MDIO bus */
 	ret = ax88172a_init_mdio(dev);
 	if (ret)
 		goto free;

 	return 0;

 free:
 	kfree(priv);
 	return ret;
 }

 static int ax88172a_stop(struct usbnet *dev)
 {
 	struct ax88172a_private *priv = dev->driver_priv;

 	netdev_dbg(dev->net, "Stopping interface\n");

 	if (priv->phydev) {
 		netdev_info(dev->net, "Disconnecting from phy %s\n",
 			    priv->phy_name);
 		phy_stop(priv->phydev);
 		phy_disconnect(priv->phydev);
 	}

 	return 0;
 }

 static void ax88172a_unbind(struct usbnet *dev, struct usb_interface *intf)
 {
 	struct ax88172a_private *priv = dev->driver_priv;

 	ax88172a_remove_mdio(dev);
 	kfree(priv);
 }

 static int ax88172a_reset(struct usbnet *dev)
 {
 	struct asix_data *data = (struct asix_data *)&dev->data;
 	struct ax88172a_private *priv = dev->driver_priv;
 	int ret;
 	u16 rx_ctl;

 	ax88172a_reset_phy(dev, priv->use_embdphy);

 	msleep(150);
 	rx_ctl = asix_read_rx_ctl(dev);
 	netdev_dbg(dev->net, "RX_CTL is 0x%04x after software reset\n", rx_ctl);
 	ret = asix_write_rx_ctl(dev, 0x0000);
 	if (ret < 0)
 		goto out;

 	rx_ctl = asix_read_rx_ctl(dev);
 	netdev_dbg(dev->net, "RX_CTL is 0x%04x setting to 0x0000\n", rx_ctl);

 	msleep(150);

 	ret = asix_write_cmd(dev, AX_CMD_WRITE_IPG0,
 			     AX88772_IPG0_DEFAULT | AX88772_IPG1_DEFAULT,
 			     AX88772_IPG2_DEFAULT, 0, NULL);
 	if (ret < 0) {
 		netdev_err(dev->net, "Write IPG,IPG1,IPG2 failed: %d\n", ret);
 		goto out;
 	}

 	/* Rewrite MAC address */
 	memcpy(data->mac_addr, dev->net->dev_addr, ETH_ALEN);
 	ret = asix_write_cmd(dev, AX_CMD_WRITE_NODE_ID, 0, 0, ETH_ALEN,
 			     data->mac_addr);
 	if (ret < 0)
 		goto out;

 	/* Set RX_CTL to default values with 2k buffer, and enable cactus */
 	ret = asix_write_rx_ctl(dev, AX_DEFAULT_RX_CTL);
 	if (ret < 0)
 		goto out;

 	rx_ctl = asix_read_rx_ctl(dev);
 	netdev_dbg(dev->net, "RX_CTL is 0x%04x after all initializations\n",
 		   rx_ctl);

 	rx_ctl = asix_read_medium_status(dev);
 	netdev_dbg(dev->net, "Medium Status is 0x%04x after all initializations\n",
 		   rx_ctl);

 	/* Connect to PHY */
 	snprintf(priv->phy_name, 20, PHY_ID_FMT,
 		 priv->mdio->id, priv->phy_addr);

 	priv->phydev = phy_connect(dev->net, priv->phy_name,
 				   &ax88172a_adjust_link,
 				   PHY_INTERFACE_MODE_MII);
 	if (IS_ERR(priv->phydev)) {
 		netdev_err(dev->net, "Could not connect to PHY device %s\n",
 			   priv->phy_name);
 		ret = PTR_ERR(priv->phydev);
 		goto out;
 	}

 	netdev_info(dev->net, "Connected to phy %s\n", priv->phy_name);

 	/* During power-up, the AX88172A set the power down (BMCR_PDOWN)
 	 * bit of the PHY. Bring the PHY up again.
 	 */
 	genphy_resume(priv->phydev);
 	phy_start(priv->phydev);

 	return 0;

 out:
 	return ret;

 }

 static int ax88172a_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
 {
 	struct ax88172a_private *dp = dev->driver_priv;
 	struct asix_rx_fixup_info *rx = &dp->rx_fixup_info;

 	return asix_rx_fixup_internal(dev, skb, rx);
 }

 const struct driver_info ax88172a_info = {
 	.description = "ASIX AX88172A USB 2.0 Ethernet",
 	.bind = ax88172a_bind,
 	.reset = ax88172a_reset,
 	.stop = ax88172a_stop,
 	.unbind = ax88172a_unbind,
 	.status = ax88172a_status,
 	.flags = FLAG_ETHER | FLAG_FRAMING_AX | FLAG_LINK_INTR |
 		 FLAG_MULTI_PACKET,
 	.rx_fixup = ax88172a_rx_fixup,
 	.tx_fixup = asix_tx_fixup,
 };
	/*
	* ASIX AX88172A based USB 2.0 Ethernet Devices
	* Copyright (C) 2012 OMICRON electronics GmbH
	*
	* Supports external PHYs via phylib. Based on the driver for the
	* AX88772. Original copyrights follow:
	*
	* Copyright (C) 2003-2006 David Hollis <dhollis@davehollis.com>
	* Copyright (C) 2005 Phil Chang <pchang23@sbcglobal.net>
	* Copyright (C) 2006 James Painter <jamie.painter@iname.com>
	* 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
	*/

	#include "asix.h"
	#include <linux/phy.h>

	struct ax88172a_private {
	struct mii_bus *mdio;
	struct phy_device *phydev;
	char phy_name[20];
	u16 phy_addr;
	u16 oldmode;
	int use_embdphy;
	struct asix_rx_fixup_info rx_fixup_info;
	};

	/* MDIO read and write wrappers for phylib */
	static int asix_mdio_bus_read(struct mii_bus *bus, int phy_id, int regnum)
	{
	return asix_mdio_read(((struct usbnet *)bus->priv)->net, phy_id,
	regnum);
	}

	static int asix_mdio_bus_write(struct mii_bus *bus, int phy_id, int regnum,
	u16 val)
	{
	asix_mdio_write(((struct usbnet *)bus->priv)->net, phy_id, regnum, val);
	return 0;
	}

	static int ax88172a_ioctl(struct net_device net, struct ifreq rq, int cmd)
	{
	if (!netif_running(net))
	return -EINVAL;

	if (!net->phydev)
	return -ENODEV;

	return phy_mii_ioctl(net->phydev, rq, cmd);
	}

	/* set MAC link settings according to information from phylib */
	static void ax88172a_adjust_link(struct net_device *netdev)
	{
	struct phy_device *phydev = netdev->phydev;
	struct usbnet *dev = netdev_priv(netdev);
	struct ax88172a_private *priv = dev->driver_priv;
	u16 mode = 0;

	if (phydev->link) {
	mode = AX88772_MEDIUM_DEFAULT;

	if (phydev->duplex == DUPLEX_HALF)
	mode &= ~AX_MEDIUM_FD;

	if (phydev->speed != SPEED_100)
	mode &= ~AX_MEDIUM_PS;
	}

	if (mode != priv->oldmode) {
	asix_write_medium_mode(dev, mode);
	priv->oldmode = mode;
	netdev_dbg(netdev, "speed %u duplex %d, setting mode to 0x%04x\n",
	phydev->speed, phydev->duplex, mode);
	phy_print_status(phydev);
	}
	}

	static void ax88172a_status(struct usbnet dev, struct urb urb)
	{
	/* link changes are detected by polling the phy */
	}

	/* use phylib infrastructure */
	static int ax88172a_init_mdio(struct usbnet *dev)
	{
	struct ax88172a_private *priv = dev->driver_priv;
	int ret, i;

	priv->mdio = mdiobus_alloc();
	if (!priv->mdio) {
	netdev_err(dev->net, "Could not allocate MDIO bus\n");
	return -ENOMEM;
	}

	priv->mdio->priv = (void *)dev;
	priv->mdio->read = &asix_mdio_bus_read;
	priv->mdio->write = &asix_mdio_bus_write;
	priv->mdio->name = "Asix MDIO Bus";
	/* mii bus name is usb-<usb bus number>-<usb device number> */
	snprintf(priv->mdio->id, MII_BUS_ID_SIZE, "usb-%03d:%03d",
	dev->udev->bus->busnum, dev->udev->devnum);

	priv->mdio->irq = kzalloc(sizeof(int) * PHY_MAX_ADDR, GFP_KERNEL);
	if (!priv->mdio->irq) {
	ret = -ENOMEM;
	goto mfree;
	}
	for (i = 0; i < PHY_MAX_ADDR; i++)
	priv->mdio->irq[i] = PHY_POLL;

	ret = mdiobus_register(priv->mdio);
	if (ret) {
	netdev_err(dev->net, "Could not register MDIO bus\n");
	goto ifree;
	}

	netdev_info(dev->net, "registered mdio bus %s\n", priv->mdio->id);
	return 0;

	ifree:
	kfree(priv->mdio->irq);
	mfree:
	mdiobus_free(priv->mdio);
	return ret;
	}

	static void ax88172a_remove_mdio(struct usbnet *dev)
	{
	struct ax88172a_private *priv = dev->driver_priv;

	netdev_info(dev->net, "deregistering mdio bus %s\n", priv->mdio->id);
	mdiobus_unregister(priv->mdio);
	kfree(priv->mdio->irq);
	mdiobus_free(priv->mdio);
	}

	static const struct net_device_ops ax88172a_netdev_ops = {
	.ndo_open = usbnet_open,
	.ndo_stop = usbnet_stop,
	.ndo_start_xmit = usbnet_start_xmit,
	.ndo_tx_timeout = usbnet_tx_timeout,
	.ndo_change_mtu = usbnet_change_mtu,
	.ndo_set_mac_address = asix_set_mac_address,
	.ndo_validate_addr = eth_validate_addr,
	.ndo_do_ioctl = ax88172a_ioctl,
	.ndo_set_rx_mode = asix_set_multicast,
	};

	static int ax88172a_get_settings(struct net_device *net,
	struct ethtool_cmd *cmd)
	{
	if (!net->phydev)
	return -ENODEV;

	return phy_ethtool_gset(net->phydev, cmd);
	}

	static int ax88172a_set_settings(struct net_device *net,
	struct ethtool_cmd *cmd)
	{
	if (!net->phydev)
	return -ENODEV;

	return phy_ethtool_sset(net->phydev, cmd);
	}

	static int ax88172a_nway_reset(struct net_device *net)
	{
	if (!net->phydev)
	return -ENODEV;

	return phy_start_aneg(net->phydev);
	}

	static const struct ethtool_ops ax88172a_ethtool_ops = {
	.get_drvinfo = asix_get_drvinfo,
	.get_link = usbnet_get_link,
	.get_msglevel = usbnet_get_msglevel,
	.set_msglevel = usbnet_set_msglevel,
	.get_wol = asix_get_wol,
	.set_wol = asix_set_wol,
	.get_eeprom_len = asix_get_eeprom_len,
	.get_eeprom = asix_get_eeprom,
	.set_eeprom = asix_set_eeprom,
	.get_settings = ax88172a_get_settings,
	.set_settings = ax88172a_set_settings,
	.nway_reset = ax88172a_nway_reset,
	};

	static int ax88172a_reset_phy(struct usbnet *dev, int embd_phy)
	{
	int ret;

	ret = asix_sw_reset(dev, AX_SWRESET_IPPD);
	if (ret < 0)
	goto err;

	msleep(150);
	ret = asix_sw_reset(dev, AX_SWRESET_CLEAR);
	if (ret < 0)
	goto err;

	msleep(150);

	ret = asix_sw_reset(dev, embd_phy ? AX_SWRESET_IPRL : AX_SWRESET_IPPD);
	if (ret < 0)
	goto err;

	return 0;

	err:
	return ret;
	}


	static int ax88172a_bind(struct usbnet dev, struct usb_interface intf)
	{
	int ret;
	u8 buf[ETH_ALEN];
	struct ax88172a_private *priv;

	usbnet_get_endpoints(dev, intf);

	priv = kzalloc(sizeof(*priv), GFP_KERNEL);
	if (!priv)
	return -ENOMEM;

	dev->driver_priv = priv;

	/* Get the MAC address */
	ret = asix_read_cmd(dev, AX_CMD_READ_NODE_ID, 0, 0, ETH_ALEN, buf);
	if (ret < 0) {
	netdev_err(dev->net, "Failed to read MAC address: %d\n", ret);
	goto free;
	}
	memcpy(dev->net->dev_addr, buf, ETH_ALEN);

	dev->net->netdev_ops = &ax88172a_netdev_ops;
	dev->net->ethtool_ops = &ax88172a_ethtool_ops;

	/* are we using the internal or the external phy? */
	ret = asix_read_cmd(dev, AX_CMD_SW_PHY_STATUS, 0, 0, 1, buf);
	if (ret < 0) {
	netdev_err(dev->net, "Failed to read software interface selection register: %d\n",
	ret);
	goto free;
	}

	netdev_dbg(dev->net, "AX_CMD_SW_PHY_STATUS = 0x%02x\n", buf[0]);
	switch (buf[0] & AX_PHY_SELECT_MASK) {
	case AX_PHY_SELECT_INTERNAL:
	netdev_dbg(dev->net, "use internal phy\n");
	priv->use_embdphy = 1;
	break;
	case AX_PHY_SELECT_EXTERNAL:
	netdev_dbg(dev->net, "use external phy\n");
	priv->use_embdphy = 0;
	break;
	default:
	netdev_err(dev->net, "Interface mode not supported by driver\n");
	ret = -ENOTSUPP;
	goto free;
	}

	priv->phy_addr = asix_read_phy_addr(dev, priv->use_embdphy);
	ax88172a_reset_phy(dev, priv->use_embdphy);

	/* 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;
	}

	/* init MDIO bus */
	ret = ax88172a_init_mdio(dev);
	if (ret)
	goto free;

	return 0;

	free:
	kfree(priv);
	return ret;
	}

	static int ax88172a_stop(struct usbnet *dev)
	{
	struct ax88172a_private *priv = dev->driver_priv;

	netdev_dbg(dev->net, "Stopping interface\n");

	if (priv->phydev) {
	netdev_info(dev->net, "Disconnecting from phy %s\n",
	priv->phy_name);
	phy_stop(priv->phydev);
	phy_disconnect(priv->phydev);
	}

	return 0;
	}

	static void ax88172a_unbind(struct usbnet dev, struct usb_interface intf)
	{
	struct ax88172a_private *priv = dev->driver_priv;

	ax88172a_remove_mdio(dev);
	kfree(priv);
	}

	static int ax88172a_reset(struct usbnet *dev)
	{
	struct asix_data data = (struct asix_data )&dev->data;
	struct ax88172a_private *priv = dev->driver_priv;
	int ret;
	u16 rx_ctl;

	ax88172a_reset_phy(dev, priv->use_embdphy);

	msleep(150);
	rx_ctl = asix_read_rx_ctl(dev);
	netdev_dbg(dev->net, "RX_CTL is 0x%04x after software reset\n", rx_ctl);
	ret = asix_write_rx_ctl(dev, 0x0000);
	if (ret < 0)
	goto out;

	rx_ctl = asix_read_rx_ctl(dev);
	netdev_dbg(dev->net, "RX_CTL is 0x%04x setting to 0x0000\n", rx_ctl);

	msleep(150);

	ret = asix_write_cmd(dev, AX_CMD_WRITE_IPG0,
	AX88772_IPG0_DEFAULT \| AX88772_IPG1_DEFAULT,
	AX88772_IPG2_DEFAULT, 0, NULL);
	if (ret < 0) {
	netdev_err(dev->net, "Write IPG,IPG1,IPG2 failed: %d\n", ret);
	goto out;
	}

	/* Rewrite MAC address */
	memcpy(data->mac_addr, dev->net->dev_addr, ETH_ALEN);
	ret = asix_write_cmd(dev, AX_CMD_WRITE_NODE_ID, 0, 0, ETH_ALEN,
	data->mac_addr);
	if (ret < 0)
	goto out;

	/* Set RX_CTL to default values with 2k buffer, and enable cactus */
	ret = asix_write_rx_ctl(dev, AX_DEFAULT_RX_CTL);
	if (ret < 0)
	goto out;

	rx_ctl = asix_read_rx_ctl(dev);
	netdev_dbg(dev->net, "RX_CTL is 0x%04x after all initializations\n",
	rx_ctl);

	rx_ctl = asix_read_medium_status(dev);
	netdev_dbg(dev->net, "Medium Status is 0x%04x after all initializations\n",
	rx_ctl);

	/* Connect to PHY */
	snprintf(priv->phy_name, 20, PHY_ID_FMT,
	priv->mdio->id, priv->phy_addr);

	priv->phydev = phy_connect(dev->net, priv->phy_name,
	&ax88172a_adjust_link,
	PHY_INTERFACE_MODE_MII);
	if (IS_ERR(priv->phydev)) {
	netdev_err(dev->net, "Could not connect to PHY device %s\n",
	priv->phy_name);
	ret = PTR_ERR(priv->phydev);
	goto out;
	}

	netdev_info(dev->net, "Connected to phy %s\n", priv->phy_name);

	/* During power-up, the AX88172A set the power down (BMCR_PDOWN)
	* bit of the PHY. Bring the PHY up again.
	*/
	genphy_resume(priv->phydev);
	phy_start(priv->phydev);

	return 0;

	out:
	return ret;

	}

	static int ax88172a_rx_fixup(struct usbnet dev, struct sk_buff skb)
	{
	struct ax88172a_private *dp = dev->driver_priv;
	struct asix_rx_fixup_info *rx = &dp->rx_fixup_info;

	return asix_rx_fixup_internal(dev, skb, rx);
	}

	const struct driver_info ax88172a_info = {
	.description = "ASIX AX88172A USB 2.0 Ethernet",
	.bind = ax88172a_bind,
	.reset = ax88172a_reset,
	.stop = ax88172a_stop,
	.unbind = ax88172a_unbind,
	.status = ax88172a_status,
	.flags = FLAG_ETHER \| FLAG_FRAMING_AX \| FLAG_LINK_INTR \|
	FLAG_MULTI_PACKET,
	.rx_fixup = ax88172a_rx_fixup,
	.tx_fixup = asix_tx_fixup,
	};