| // SPDX-License-Identifier: GPL-2.0-or-later |
| /* |
| * 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. |
| */ |
| |
| #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 < ETH_ALEN) { |
| 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, |
| }; |