2 * ASIX AX88172A based USB 2.0 Ethernet Devices
3 * Copyright (C) 2012 OMICRON electronics GmbH
5 * Supports external PHYs via phylib. Based on the driver for the
6 * AX88772. Original copyrights follow:
11 * Copyright (c) 2002-2003 TiVo Inc.
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.
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.
23 * You should have received a copy of the GNU General Public License
24 * along with this program; if not, see <http://www.gnu.org/licenses/>.
28 #include <linux/phy.h>
30 struct ax88172a_private {
32 struct phy_device *phydev;
37 struct asix_rx_fixup_info rx_fixup_info;
40 /* MDIO read and write wrappers for phylib */
41 static int asix_mdio_bus_read(struct mii_bus *bus, int phy_id, int regnum)
43 return asix_mdio_read(((struct usbnet *)bus->priv)->net, phy_id,
47 static int asix_mdio_bus_write(struct mii_bus *bus, int phy_id, int regnum,
50 asix_mdio_write(((struct usbnet *)bus->priv)->net, phy_id, regnum, val);
54 static int ax88172a_ioctl(struct net_device *net, struct ifreq *rq, int cmd)
56 if (!netif_running(net))
62 return phy_mii_ioctl(net->phydev, rq, cmd);
65 /* set MAC link settings according to information from phylib */
66 static void ax88172a_adjust_link(struct net_device *netdev)
68 struct phy_device *phydev = netdev->phydev;
69 struct usbnet *dev = netdev_priv(netdev);
70 struct ax88172a_private *priv = dev->driver_priv;
74 mode = AX88772_MEDIUM_DEFAULT;
76 if (phydev->duplex == DUPLEX_HALF)
77 mode &= ~AX_MEDIUM_FD;
79 if (phydev->speed != SPEED_100)
80 mode &= ~AX_MEDIUM_PS;
83 if (mode != priv->oldmode) {
84 asix_write_medium_mode(dev, 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);
92 static void ax88172a_status(struct usbnet *dev, struct urb *urb)
94 /* link changes are detected by polling the phy */
97 /* use phylib infrastructure */
98 static int ax88172a_init_mdio(struct usbnet *dev)
100 struct ax88172a_private *priv = dev->driver_priv;
103 priv->mdio = mdiobus_alloc();
105 netdev_err(dev->net, "Could not allocate MDIO bus\n");
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);
117 ret = mdiobus_register(priv->mdio);
119 netdev_err(dev->net, "Could not register MDIO bus\n");
123 netdev_info(dev->net, "registered mdio bus %s\n", priv->mdio->id);
127 mdiobus_free(priv->mdio);
131 static void ax88172a_remove_mdio(struct usbnet *dev)
133 struct ax88172a_private *priv = dev->driver_priv;
135 netdev_info(dev->net, "deregistering mdio bus %s\n", priv->mdio->id);
136 mdiobus_unregister(priv->mdio);
137 mdiobus_free(priv->mdio);
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,
146 .ndo_set_mac_address = asix_set_mac_address,
147 .ndo_validate_addr = eth_validate_addr,
148 .ndo_do_ioctl = ax88172a_ioctl,
149 .ndo_set_rx_mode = asix_set_multicast,
152 static int ax88172a_nway_reset(struct net_device *net)
157 return phy_start_aneg(net->phydev);
160 static const struct ethtool_ops ax88172a_ethtool_ops = {
161 .get_drvinfo = asix_get_drvinfo,
162 .get_link = usbnet_get_link,
163 .get_msglevel = usbnet_get_msglevel,
164 .set_msglevel = usbnet_set_msglevel,
165 .get_wol = asix_get_wol,
166 .set_wol = asix_set_wol,
167 .get_eeprom_len = asix_get_eeprom_len,
168 .get_eeprom = asix_get_eeprom,
169 .set_eeprom = asix_set_eeprom,
170 .nway_reset = ax88172a_nway_reset,
171 .get_link_ksettings = phy_ethtool_get_link_ksettings,
172 .set_link_ksettings = phy_ethtool_set_link_ksettings,
175 static int ax88172a_reset_phy(struct usbnet *dev, int embd_phy)
179 ret = asix_sw_reset(dev, AX_SWRESET_IPPD);
184 ret = asix_sw_reset(dev, AX_SWRESET_CLEAR);
190 ret = asix_sw_reset(dev, embd_phy ? AX_SWRESET_IPRL : AX_SWRESET_IPPD);
201 static int ax88172a_bind(struct usbnet *dev, struct usb_interface *intf)
205 struct ax88172a_private *priv;
207 usbnet_get_endpoints(dev, intf);
209 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
213 dev->driver_priv = priv;
215 /* Get the MAC address */
216 ret = asix_read_cmd(dev, AX_CMD_READ_NODE_ID, 0, 0, ETH_ALEN, buf);
218 netdev_err(dev->net, "Failed to read MAC address: %d\n", ret);
221 memcpy(dev->net->dev_addr, buf, ETH_ALEN);
223 dev->net->netdev_ops = &ax88172a_netdev_ops;
224 dev->net->ethtool_ops = &ax88172a_ethtool_ops;
226 /* are we using the internal or the external phy? */
227 ret = asix_read_cmd(dev, AX_CMD_SW_PHY_STATUS, 0, 0, 1, buf);
229 netdev_err(dev->net, "Failed to read software interface selection register: %d\n",
234 netdev_dbg(dev->net, "AX_CMD_SW_PHY_STATUS = 0x%02x\n", buf[0]);
235 switch (buf[0] & AX_PHY_SELECT_MASK) {
236 case AX_PHY_SELECT_INTERNAL:
237 netdev_dbg(dev->net, "use internal phy\n");
238 priv->use_embdphy = 1;
240 case AX_PHY_SELECT_EXTERNAL:
241 netdev_dbg(dev->net, "use external phy\n");
242 priv->use_embdphy = 0;
245 netdev_err(dev->net, "Interface mode not supported by driver\n");
250 priv->phy_addr = asix_read_phy_addr(dev, priv->use_embdphy);
251 ax88172a_reset_phy(dev, priv->use_embdphy);
253 /* Asix framing packs multiple eth frames into a 2K usb bulk transfer */
254 if (dev->driver_info->flags & FLAG_FRAMING_AX) {
255 /* hard_mtu is still the default - the device does not support
257 dev->rx_urb_size = 2048;
261 ret = ax88172a_init_mdio(dev);
272 static int ax88172a_stop(struct usbnet *dev)
274 struct ax88172a_private *priv = dev->driver_priv;
276 netdev_dbg(dev->net, "Stopping interface\n");
279 netdev_info(dev->net, "Disconnecting from phy %s\n",
281 phy_stop(priv->phydev);
282 phy_disconnect(priv->phydev);
288 static void ax88172a_unbind(struct usbnet *dev, struct usb_interface *intf)
290 struct ax88172a_private *priv = dev->driver_priv;
292 ax88172a_remove_mdio(dev);
296 static int ax88172a_reset(struct usbnet *dev)
298 struct asix_data *data = (struct asix_data *)&dev->data;
299 struct ax88172a_private *priv = dev->driver_priv;
303 ax88172a_reset_phy(dev, priv->use_embdphy);
306 rx_ctl = asix_read_rx_ctl(dev);
307 netdev_dbg(dev->net, "RX_CTL is 0x%04x after software reset\n", rx_ctl);
308 ret = asix_write_rx_ctl(dev, 0x0000);
312 rx_ctl = asix_read_rx_ctl(dev);
313 netdev_dbg(dev->net, "RX_CTL is 0x%04x setting to 0x0000\n", rx_ctl);
317 ret = asix_write_cmd(dev, AX_CMD_WRITE_IPG0,
318 AX88772_IPG0_DEFAULT | AX88772_IPG1_DEFAULT,
319 AX88772_IPG2_DEFAULT, 0, NULL);
321 netdev_err(dev->net, "Write IPG,IPG1,IPG2 failed: %d\n", ret);
325 /* Rewrite MAC address */
326 memcpy(data->mac_addr, dev->net->dev_addr, ETH_ALEN);
327 ret = asix_write_cmd(dev, AX_CMD_WRITE_NODE_ID, 0, 0, ETH_ALEN,
332 /* Set RX_CTL to default values with 2k buffer, and enable cactus */
333 ret = asix_write_rx_ctl(dev, AX_DEFAULT_RX_CTL);
337 rx_ctl = asix_read_rx_ctl(dev);
338 netdev_dbg(dev->net, "RX_CTL is 0x%04x after all initializations\n",
341 rx_ctl = asix_read_medium_status(dev);
342 netdev_dbg(dev->net, "Medium Status is 0x%04x after all initializations\n",
346 snprintf(priv->phy_name, 20, PHY_ID_FMT,
347 priv->mdio->id, priv->phy_addr);
349 priv->phydev = phy_connect(dev->net, priv->phy_name,
350 &ax88172a_adjust_link,
351 PHY_INTERFACE_MODE_MII);
352 if (IS_ERR(priv->phydev)) {
353 netdev_err(dev->net, "Could not connect to PHY device %s\n",
355 ret = PTR_ERR(priv->phydev);
359 netdev_info(dev->net, "Connected to phy %s\n", priv->phy_name);
361 /* During power-up, the AX88172A set the power down (BMCR_PDOWN)
362 * bit of the PHY. Bring the PHY up again.
364 genphy_resume(priv->phydev);
365 phy_start(priv->phydev);
374 static int ax88172a_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
376 struct ax88172a_private *dp = dev->driver_priv;
377 struct asix_rx_fixup_info *rx = &dp->rx_fixup_info;
379 return asix_rx_fixup_internal(dev, skb, rx);
382 const struct driver_info ax88172a_info = {
383 .description = "ASIX AX88172A USB 2.0 Ethernet",
384 .bind = ax88172a_bind,
385 .reset = ax88172a_reset,
386 .stop = ax88172a_stop,
387 .unbind = ax88172a_unbind,
388 .status = ax88172a_status,
389 .flags = FLAG_ETHER | FLAG_FRAMING_AX | FLAG_LINK_INTR |
391 .rx_fixup = ax88172a_rx_fixup,
392 .tx_fixup = asix_tx_fixup,