[linux-block.git] / drivers / net / usb / ax88172a.c

/*
 * 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, see <http://www.gnu.org/licenses/>.
 */

#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, 0);
		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;

	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);

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

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

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);
	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_get_stats64	= usbnet_get_stats64,
	.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 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,
	.nway_reset		= phy_ethtool_nway_reset,
	.get_link_ksettings	= phy_ethtool_get_link_ksettings,
	.set_link_ksettings	= phy_ethtool_set_link_ksettings,
};

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

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

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

	msleep(150);

	ret = asix_sw_reset(dev, embd_phy ? AX_SWRESET_IPRL : AX_SWRESET_IPPD,
			    0);
	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, 0);
	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, 0);
	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, 0);
	netdev_dbg(dev->net, "RX_CTL is 0x%04x after software reset\n", rx_ctl);
	ret = asix_write_rx_ctl(dev, 0x0000, 0);
	if (ret < 0)
		goto out;

	rx_ctl = asix_read_rx_ctl(dev, 0);
	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, 0);
	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, 0);
	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, 0);
	if (ret < 0)
		goto out;

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

	rx_ctl = asix_read_medium_status(dev, 0);
	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,
};
Commit	Line	Data
16626b0c CR	1	/*
	2	* ASIX AX88172A based USB 2.0 Ethernet Devices
	3	* Copyright (C) 2012 OMICRON electronics GmbH
	4	*
	5	* Supports external PHYs via phylib. Based on the driver for the
	6	* AX88772. Original copyrights follow:
	7	*
	8	* Copyright (C) 2003-2006 David Hollis <dhollis@davehollis.com>
	9	* Copyright (C) 2005 Phil Chang <pchang23@sbcglobal.net>
	10	* Copyright (C) 2006 James Painter <jamie.painter@iname.com>
	11	* Copyright (c) 2002-2003 TiVo Inc.
	12	*
	13	* This program is free software; you can redistribute it and/or modify
	14	* it under the terms of the GNU General Public License as published by
	15	* the Free Software Foundation; either version 2 of the License, or
	16	* (at your option) any later version.
	17	*
	18	* This program is distributed in the hope that it will be useful,
	19	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	20	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	21	* GNU General Public License for more details.
	22	*
	23	* You should have received a copy of the GNU General Public License
9cb00073	24	* along with this program; if not, see <http://www.gnu.org/licenses/>.
16626b0c CR	25	*/
	26
	27	#include "asix.h"
	28	#include <linux/phy.h>
	29
	30	struct ax88172a_private {
	31	struct mii_bus *mdio;
	32	struct phy_device *phydev;
	33	char phy_name[20];
	34	u16 phy_addr;
	35	u16 oldmode;
	36	int use_embdphy;
8b5b6f54	37	struct asix_rx_fixup_info rx_fixup_info;
16626b0c CR	38	};
	39
	40	/* MDIO read and write wrappers for phylib */
	41	static int asix_mdio_bus_read(struct mii_bus *bus, int phy_id, int regnum)
	42	{
	43	return asix_mdio_read(((struct usbnet *)bus->priv)->net, phy_id,
	44	regnum);
	45	}
	46
	47	static int asix_mdio_bus_write(struct mii_bus *bus, int phy_id, int regnum,
	48	u16 val)
	49	{
	50	asix_mdio_write(((struct usbnet *)bus->priv)->net, phy_id, regnum, val);
	51	return 0;
	52	}
	53
	54	static int ax88172a_ioctl(struct net_device net, struct ifreq rq, int cmd)
	55	{
	56	if (!netif_running(net))
	57	return -EINVAL;
	58
	59	if (!net->phydev)
	60	return -ENODEV;
	61
	62	return phy_mii_ioctl(net->phydev, rq, cmd);
	63	}
	64
	65	/* set MAC link settings according to information from phylib */
	66	static void ax88172a_adjust_link(struct net_device *netdev)
	67	{
	68	struct phy_device *phydev = netdev->phydev;
	69	struct usbnet *dev = netdev_priv(netdev);
	70	struct ax88172a_private *priv = dev->driver_priv;
	71	u16 mode = 0;
	72
	73	if (phydev->link) {
	74	mode = AX88772_MEDIUM_DEFAULT;
	75
	76	if (phydev->duplex == DUPLEX_HALF)
	77	mode &= ~AX_MEDIUM_FD;
	78
	79	if (phydev->speed != SPEED_100)
	80	mode &= ~AX_MEDIUM_PS;
	81	}
	82
	83	if (mode != priv->oldmode) {
d9fe64e5	84	asix_write_medium_mode(dev, mode, 0);
16626b0c CR	85	priv->oldmode = mode;
	86	netdev_dbg(netdev, "speed %u duplex %d, setting mode to 0x%04x\n",
	87	phydev->speed, phydev->duplex, mode);
	88	phy_print_status(phydev);
	89	}
	90	}
	91
	92	static void ax88172a_status(struct usbnet dev, struct urb urb)
	93	{
	94	/* link changes are detected by polling the phy */
	95	}
	96
	97	/* use phylib infrastructure */
	98	static int ax88172a_init_mdio(struct usbnet *dev)
	99	{
	100	struct ax88172a_private *priv = dev->driver_priv;
e7f4dc35	101	int ret;
16626b0c CR	102
	103	priv->mdio = mdiobus_alloc();
	104	if (!priv->mdio) {
	105	netdev_err(dev->net, "Could not allocate MDIO bus\n");
	106	return -ENOMEM;
	107	}
	108
	109	priv->mdio->priv = (void *)dev;
	110	priv->mdio->read = &asix_mdio_bus_read;
	111	priv->mdio->write = &asix_mdio_bus_write;
	112	priv->mdio->name = "Asix MDIO Bus";
	113	/* mii bus name is usb-<usb bus number>-<usb device number> */
	114	snprintf(priv->mdio->id, MII_BUS_ID_SIZE, "usb-%03d:%03d",
	115	dev->udev->bus->busnum, dev->udev->devnum);
	116
16626b0c CR	117	ret = mdiobus_register(priv->mdio);
	118	if (ret) {
	119	netdev_err(dev->net, "Could not register MDIO bus\n");
e7f4dc35	120	goto mfree;
16626b0c CR	121	}
	122
	123	netdev_info(dev->net, "registered mdio bus %s\n", priv->mdio->id);
	124	return 0;
	125
16626b0c CR	126	mfree:
	127	mdiobus_free(priv->mdio);
	128	return ret;
	129	}
	130
	131	static void ax88172a_remove_mdio(struct usbnet *dev)
	132	{
	133	struct ax88172a_private *priv = dev->driver_priv;
	134
	135	netdev_info(dev->net, "deregistering mdio bus %s\n", priv->mdio->id);
	136	mdiobus_unregister(priv->mdio);
16626b0c CR	137	mdiobus_free(priv->mdio);
	138	}
	139
	140	static const struct net_device_ops ax88172a_netdev_ops = {
	141	.ndo_open = usbnet_open,
	142	.ndo_stop = usbnet_stop,
	143	.ndo_start_xmit = usbnet_start_xmit,
	144	.ndo_tx_timeout = usbnet_tx_timeout,
	145	.ndo_change_mtu = usbnet_change_mtu,
c8b5d129	146	.ndo_get_stats64 = usbnet_get_stats64,
16626b0c CR	147	.ndo_set_mac_address = asix_set_mac_address,
	148	.ndo_validate_addr = eth_validate_addr,
	149	.ndo_do_ioctl = ax88172a_ioctl,
	150	.ndo_set_rx_mode = asix_set_multicast,
	151	};
	152
16626b0c CR	153	static const struct ethtool_ops ax88172a_ethtool_ops = {
	154	.get_drvinfo = asix_get_drvinfo,
	155	.get_link = usbnet_get_link,
	156	.get_msglevel = usbnet_get_msglevel,
	157	.set_msglevel = usbnet_set_msglevel,
	158	.get_wol = asix_get_wol,
	159	.set_wol = asix_set_wol,
	160	.get_eeprom_len = asix_get_eeprom_len,
	161	.get_eeprom = asix_get_eeprom,
cb7b24cd	162	.set_eeprom = asix_set_eeprom,
eea16da8	163	.nway_reset = phy_ethtool_nway_reset,
b3f2cf8f PR	164	.get_link_ksettings = phy_ethtool_get_link_ksettings,
b3f2cf8f PR	165	.set_link_ksettings = phy_ethtool_set_link_ksettings,
16626b0c CR	166	};
	167
	168	static int ax88172a_reset_phy(struct usbnet *dev, int embd_phy)
	169	{
	170	int ret;
	171
d9fe64e5	172	ret = asix_sw_reset(dev, AX_SWRESET_IPPD, 0);
16626b0c CR	173	if (ret < 0)
	174	goto err;
	175
	176	msleep(150);
d9fe64e5	177	ret = asix_sw_reset(dev, AX_SWRESET_CLEAR, 0);
16626b0c CR	178	if (ret < 0)
	179	goto err;
	180
	181	msleep(150);
	182
d9fe64e5 RF	183	ret = asix_sw_reset(dev, embd_phy ? AX_SWRESET_IPRL : AX_SWRESET_IPPD,
d9fe64e5 RF	184	0);
16626b0c CR	185	if (ret < 0)
	186	goto err;
	187
	188	return 0;
	189
	190	err:
	191	return ret;
	192	}
	193
	194
	195	static int ax88172a_bind(struct usbnet dev, struct usb_interface intf)
	196	{
	197	int ret;
16626b0c CR	198	u8 buf[ETH_ALEN];
	199	struct ax88172a_private *priv;
	200
16626b0c CR	201	usbnet_get_endpoints(dev, intf);
	202
	203	priv = kzalloc(sizeof(*priv), GFP_KERNEL);
38673c82	204	if (!priv)
16626b0c	205	return -ENOMEM;
38673c82	206
16626b0c CR	207	dev->driver_priv = priv;
	208
	209	/* Get the MAC address */
d9fe64e5	210	ret = asix_read_cmd(dev, AX_CMD_READ_NODE_ID, 0, 0, ETH_ALEN, buf, 0);
16626b0c CR	211	if (ret < 0) {
	212	netdev_err(dev->net, "Failed to read MAC address: %d\n", ret);
	213	goto free;
	214	}
	215	memcpy(dev->net->dev_addr, buf, ETH_ALEN);
	216
	217	dev->net->netdev_ops = &ax88172a_netdev_ops;
	218	dev->net->ethtool_ops = &ax88172a_ethtool_ops;
	219
	220	/* are we using the internal or the external phy? */
d9fe64e5	221	ret = asix_read_cmd(dev, AX_CMD_SW_PHY_STATUS, 0, 0, 1, buf, 0);
16626b0c CR	222	if (ret < 0) {
	223	netdev_err(dev->net, "Failed to read software interface selection register: %d\n",
	224	ret);
	225	goto free;
	226	}
	227
	228	netdev_dbg(dev->net, "AX_CMD_SW_PHY_STATUS = 0x%02x\n", buf[0]);
	229	switch (buf[0] & AX_PHY_SELECT_MASK) {
	230	case AX_PHY_SELECT_INTERNAL:
	231	netdev_dbg(dev->net, "use internal phy\n");
	232	priv->use_embdphy = 1;
	233	break;
	234	case AX_PHY_SELECT_EXTERNAL:
	235	netdev_dbg(dev->net, "use external phy\n");
	236	priv->use_embdphy = 0;
	237	break;
	238	default:
	239	netdev_err(dev->net, "Interface mode not supported by driver\n");
fcc24db5	240	ret = -ENOTSUPP;
16626b0c CR	241	goto free;
	242	}
	243
	244	priv->phy_addr = asix_read_phy_addr(dev, priv->use_embdphy);
	245	ax88172a_reset_phy(dev, priv->use_embdphy);
	246
	247	/* Asix framing packs multiple eth frames into a 2K usb bulk transfer */
	248	if (dev->driver_info->flags & FLAG_FRAMING_AX) {
	249	/* hard_mtu is still the default - the device does not support
	250	jumbo eth frames */
	251	dev->rx_urb_size = 2048;
	252	}
	253
	254	/* init MDIO bus */
	255	ret = ax88172a_init_mdio(dev);
	256	if (ret)
	257	goto free;
	258
	259	return 0;
	260
	261	free:
	262	kfree(priv);
	263	return ret;
	264	}
	265
	266	static int ax88172a_stop(struct usbnet *dev)
	267	{
	268	struct ax88172a_private *priv = dev->driver_priv;
	269
	270	netdev_dbg(dev->net, "Stopping interface\n");
	271
	272	if (priv->phydev) {
	273	netdev_info(dev->net, "Disconnecting from phy %s\n",
	274	priv->phy_name);
	275	phy_stop(priv->phydev);
	276	phy_disconnect(priv->phydev);
	277	}
	278
	279	return 0;
	280	}
	281
	282	static void ax88172a_unbind(struct usbnet dev, struct usb_interface intf)
	283	{
	284	struct ax88172a_private *priv = dev->driver_priv;
	285
	286	ax88172a_remove_mdio(dev);
	287	kfree(priv);
	288	}
	289
	290	static int ax88172a_reset(struct usbnet *dev)
	291	{
	292	struct asix_data data = (struct asix_data )&dev->data;
	293	struct ax88172a_private *priv = dev->driver_priv;
	294	int ret;
	295	u16 rx_ctl;
	296
	297	ax88172a_reset_phy(dev, priv->use_embdphy);
	298
	299	msleep(150);
d9fe64e5	300	rx_ctl = asix_read_rx_ctl(dev, 0);
16626b0c	301	netdev_dbg(dev->net, "RX_CTL is 0x%04x after software reset\n", rx_ctl);
d9fe64e5	302	ret = asix_write_rx_ctl(dev, 0x0000, 0);
16626b0c CR	303	if (ret < 0)
	304	goto out;
	305
d9fe64e5	306	rx_ctl = asix_read_rx_ctl(dev, 0);
16626b0c CR	307	netdev_dbg(dev->net, "RX_CTL is 0x%04x setting to 0x0000\n", rx_ctl);
	308
	309	msleep(150);
	310
	311	ret = asix_write_cmd(dev, AX_CMD_WRITE_IPG0,
	312	AX88772_IPG0_DEFAULT \| AX88772_IPG1_DEFAULT,
d9fe64e5	313	AX88772_IPG2_DEFAULT, 0, NULL, 0);
16626b0c CR	314	if (ret < 0) {
	315	netdev_err(dev->net, "Write IPG,IPG1,IPG2 failed: %d\n", ret);
	316	goto out;
	317	}
	318
	319	/* Rewrite MAC address */
	320	memcpy(data->mac_addr, dev->net->dev_addr, ETH_ALEN);
	321	ret = asix_write_cmd(dev, AX_CMD_WRITE_NODE_ID, 0, 0, ETH_ALEN,
d9fe64e5	322	data->mac_addr, 0);
16626b0c CR	323	if (ret < 0)
	324	goto out;
	325
	326	/* Set RX_CTL to default values with 2k buffer, and enable cactus */
d9fe64e5	327	ret = asix_write_rx_ctl(dev, AX_DEFAULT_RX_CTL, 0);
16626b0c CR	328	if (ret < 0)
	329	goto out;
	330
d9fe64e5	331	rx_ctl = asix_read_rx_ctl(dev, 0);
16626b0c CR	332	netdev_dbg(dev->net, "RX_CTL is 0x%04x after all initializations\n",
	333	rx_ctl);
	334
d9fe64e5	335	rx_ctl = asix_read_medium_status(dev, 0);
16626b0c CR	336	netdev_dbg(dev->net, "Medium Status is 0x%04x after all initializations\n",
	337	rx_ctl);
	338
	339	/* Connect to PHY */
	340	snprintf(priv->phy_name, 20, PHY_ID_FMT,
	341	priv->mdio->id, priv->phy_addr);
	342
	343	priv->phydev = phy_connect(dev->net, priv->phy_name,
	344	&ax88172a_adjust_link,
f9a8f83b	345	PHY_INTERFACE_MODE_MII);
16626b0c CR	346	if (IS_ERR(priv->phydev)) {
	347	netdev_err(dev->net, "Could not connect to PHY device %s\n",
	348	priv->phy_name);
	349	ret = PTR_ERR(priv->phydev);
	350	goto out;
	351	}
	352
	353	netdev_info(dev->net, "Connected to phy %s\n", priv->phy_name);
	354
	355	/* During power-up, the AX88172A set the power down (BMCR_PDOWN)
	356	* bit of the PHY. Bring the PHY up again.
	357	*/
	358	genphy_resume(priv->phydev);
	359	phy_start(priv->phydev);
	360
	361	return 0;
	362
	363	out:
	364	return ret;
	365
	366	}
	367
8b5b6f54 LS	368	static int ax88172a_rx_fixup(struct usbnet dev, struct sk_buff skb)
	369	{
	370	struct ax88172a_private *dp = dev->driver_priv;
	371	struct asix_rx_fixup_info *rx = &dp->rx_fixup_info;
	372
	373	return asix_rx_fixup_internal(dev, skb, rx);
	374	}
	375
16626b0c CR	376	const struct driver_info ax88172a_info = {
	377	.description = "ASIX AX88172A USB 2.0 Ethernet",
	378	.bind = ax88172a_bind,
	379	.reset = ax88172a_reset,
	380	.stop = ax88172a_stop,
	381	.unbind = ax88172a_unbind,
	382	.status = ax88172a_status,
	383	.flags = FLAG_ETHER \| FLAG_FRAMING_AX \| FLAG_LINK_INTR \|
	384	FLAG_MULTI_PACKET,
8b5b6f54	385	.rx_fixup = ax88172a_rx_fixup,
16626b0c CR	386	.tx_fixup = asix_tx_fixup,
16626b0c CR	387	};