365 lines
9.1 KiB
C
365 lines
9.1 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* ASIX AX88172A based USB 2.0 Ethernet Devices
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* Copyright (C) 2012 OMICRON electronics GmbH
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*
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* Supports external PHYs via phylib. Based on the driver for the
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* AX88772. Original copyrights follow:
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*
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* Copyright (C) 2003-2006 David Hollis <dhollis@davehollis.com>
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* Copyright (C) 2005 Phil Chang <pchang23@sbcglobal.net>
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* Copyright (C) 2006 James Painter <jamie.painter@iname.com>
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* Copyright (c) 2002-2003 TiVo Inc.
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*/
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#include "asix.h"
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#include <linux/phy.h>
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struct ax88172a_private {
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struct mii_bus *mdio;
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struct phy_device *phydev;
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char phy_name[20];
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u16 phy_addr;
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u16 oldmode;
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int use_embdphy;
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struct asix_rx_fixup_info rx_fixup_info;
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};
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/* MDIO read and write wrappers for phylib */
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static int asix_mdio_bus_read(struct mii_bus *bus, int phy_id, int regnum)
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{
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return asix_mdio_read(((struct usbnet *)bus->priv)->net, phy_id,
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regnum);
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}
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static int asix_mdio_bus_write(struct mii_bus *bus, int phy_id, int regnum,
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u16 val)
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{
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asix_mdio_write(((struct usbnet *)bus->priv)->net, phy_id, regnum, val);
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return 0;
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}
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/* set MAC link settings according to information from phylib */
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static void ax88172a_adjust_link(struct net_device *netdev)
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{
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struct phy_device *phydev = netdev->phydev;
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struct usbnet *dev = netdev_priv(netdev);
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struct ax88172a_private *priv = dev->driver_priv;
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u16 mode = 0;
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if (phydev->link) {
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mode = AX88772_MEDIUM_DEFAULT;
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if (phydev->duplex == DUPLEX_HALF)
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mode &= ~AX_MEDIUM_FD;
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if (phydev->speed != SPEED_100)
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mode &= ~AX_MEDIUM_PS;
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}
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if (mode != priv->oldmode) {
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asix_write_medium_mode(dev, mode, 0);
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priv->oldmode = mode;
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netdev_dbg(netdev, "speed %u duplex %d, setting mode to 0x%04x\n",
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phydev->speed, phydev->duplex, mode);
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phy_print_status(phydev);
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}
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}
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static void ax88172a_status(struct usbnet *dev, struct urb *urb)
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{
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/* link changes are detected by polling the phy */
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}
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/* use phylib infrastructure */
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static int ax88172a_init_mdio(struct usbnet *dev)
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{
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struct ax88172a_private *priv = dev->driver_priv;
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int ret;
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priv->mdio = mdiobus_alloc();
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if (!priv->mdio) {
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netdev_err(dev->net, "Could not allocate MDIO bus\n");
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return -ENOMEM;
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}
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priv->mdio->priv = (void *)dev;
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priv->mdio->read = &asix_mdio_bus_read;
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priv->mdio->write = &asix_mdio_bus_write;
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priv->mdio->name = "Asix MDIO Bus";
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/* mii bus name is usb-<usb bus number>-<usb device number> */
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snprintf(priv->mdio->id, MII_BUS_ID_SIZE, "usb-%03d:%03d",
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dev->udev->bus->busnum, dev->udev->devnum);
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ret = mdiobus_register(priv->mdio);
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if (ret) {
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netdev_err(dev->net, "Could not register MDIO bus\n");
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goto mfree;
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}
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netdev_info(dev->net, "registered mdio bus %s\n", priv->mdio->id);
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return 0;
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mfree:
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mdiobus_free(priv->mdio);
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return ret;
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}
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static void ax88172a_remove_mdio(struct usbnet *dev)
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{
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struct ax88172a_private *priv = dev->driver_priv;
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netdev_info(dev->net, "deregistering mdio bus %s\n", priv->mdio->id);
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mdiobus_unregister(priv->mdio);
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mdiobus_free(priv->mdio);
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}
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static const struct net_device_ops ax88172a_netdev_ops = {
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.ndo_open = usbnet_open,
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.ndo_stop = usbnet_stop,
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.ndo_start_xmit = usbnet_start_xmit,
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.ndo_tx_timeout = usbnet_tx_timeout,
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.ndo_change_mtu = usbnet_change_mtu,
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.ndo_get_stats64 = usbnet_get_stats64,
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.ndo_set_mac_address = asix_set_mac_address,
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.ndo_validate_addr = eth_validate_addr,
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.ndo_do_ioctl = phy_do_ioctl_running,
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.ndo_set_rx_mode = asix_set_multicast,
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};
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static const struct ethtool_ops ax88172a_ethtool_ops = {
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.get_drvinfo = asix_get_drvinfo,
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.get_link = usbnet_get_link,
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.get_msglevel = usbnet_get_msglevel,
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.set_msglevel = usbnet_set_msglevel,
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.get_wol = asix_get_wol,
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.set_wol = asix_set_wol,
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.get_eeprom_len = asix_get_eeprom_len,
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.get_eeprom = asix_get_eeprom,
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.set_eeprom = asix_set_eeprom,
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.nway_reset = phy_ethtool_nway_reset,
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.get_link_ksettings = phy_ethtool_get_link_ksettings,
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.set_link_ksettings = phy_ethtool_set_link_ksettings,
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};
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static int ax88172a_reset_phy(struct usbnet *dev, int embd_phy)
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{
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int ret;
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ret = asix_sw_reset(dev, AX_SWRESET_IPPD, 0);
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if (ret < 0)
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goto err;
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msleep(150);
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ret = asix_sw_reset(dev, AX_SWRESET_CLEAR, 0);
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if (ret < 0)
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goto err;
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msleep(150);
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ret = asix_sw_reset(dev, embd_phy ? AX_SWRESET_IPRL : AX_SWRESET_IPPD,
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0);
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if (ret < 0)
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goto err;
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return 0;
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err:
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return ret;
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}
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static int ax88172a_bind(struct usbnet *dev, struct usb_interface *intf)
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{
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int ret;
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u8 buf[ETH_ALEN];
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struct ax88172a_private *priv;
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usbnet_get_endpoints(dev, intf);
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priv = kzalloc(sizeof(*priv), GFP_KERNEL);
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if (!priv)
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return -ENOMEM;
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dev->driver_priv = priv;
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/* Get the MAC address */
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ret = asix_read_cmd(dev, AX_CMD_READ_NODE_ID, 0, 0, ETH_ALEN, buf, 0);
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if (ret < ETH_ALEN) {
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netdev_err(dev->net, "Failed to read MAC address: %d\n", ret);
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goto free;
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}
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memcpy(dev->net->dev_addr, buf, ETH_ALEN);
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dev->net->netdev_ops = &ax88172a_netdev_ops;
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dev->net->ethtool_ops = &ax88172a_ethtool_ops;
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/* are we using the internal or the external phy? */
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ret = asix_read_cmd(dev, AX_CMD_SW_PHY_STATUS, 0, 0, 1, buf, 0);
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if (ret < 0) {
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netdev_err(dev->net, "Failed to read software interface selection register: %d\n",
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ret);
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goto free;
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}
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netdev_dbg(dev->net, "AX_CMD_SW_PHY_STATUS = 0x%02x\n", buf[0]);
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switch (buf[0] & AX_PHY_SELECT_MASK) {
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case AX_PHY_SELECT_INTERNAL:
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netdev_dbg(dev->net, "use internal phy\n");
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priv->use_embdphy = 1;
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break;
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case AX_PHY_SELECT_EXTERNAL:
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netdev_dbg(dev->net, "use external phy\n");
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priv->use_embdphy = 0;
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break;
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default:
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netdev_err(dev->net, "Interface mode not supported by driver\n");
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ret = -ENOTSUPP;
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goto free;
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}
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priv->phy_addr = asix_read_phy_addr(dev, priv->use_embdphy);
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ax88172a_reset_phy(dev, priv->use_embdphy);
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/* Asix framing packs multiple eth frames into a 2K usb bulk transfer */
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if (dev->driver_info->flags & FLAG_FRAMING_AX) {
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/* hard_mtu is still the default - the device does not support
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jumbo eth frames */
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dev->rx_urb_size = 2048;
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}
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/* init MDIO bus */
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ret = ax88172a_init_mdio(dev);
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if (ret)
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goto free;
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return 0;
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free:
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kfree(priv);
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return ret;
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}
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static int ax88172a_stop(struct usbnet *dev)
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{
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struct ax88172a_private *priv = dev->driver_priv;
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netdev_dbg(dev->net, "Stopping interface\n");
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if (priv->phydev) {
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netdev_info(dev->net, "Disconnecting from phy %s\n",
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priv->phy_name);
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phy_stop(priv->phydev);
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phy_disconnect(priv->phydev);
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}
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return 0;
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}
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static void ax88172a_unbind(struct usbnet *dev, struct usb_interface *intf)
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{
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struct ax88172a_private *priv = dev->driver_priv;
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ax88172a_remove_mdio(dev);
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kfree(priv);
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}
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static int ax88172a_reset(struct usbnet *dev)
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{
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struct asix_data *data = (struct asix_data *)&dev->data;
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struct ax88172a_private *priv = dev->driver_priv;
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int ret;
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u16 rx_ctl;
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ax88172a_reset_phy(dev, priv->use_embdphy);
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msleep(150);
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rx_ctl = asix_read_rx_ctl(dev, 0);
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netdev_dbg(dev->net, "RX_CTL is 0x%04x after software reset\n", rx_ctl);
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ret = asix_write_rx_ctl(dev, 0x0000, 0);
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if (ret < 0)
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goto out;
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rx_ctl = asix_read_rx_ctl(dev, 0);
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netdev_dbg(dev->net, "RX_CTL is 0x%04x setting to 0x0000\n", rx_ctl);
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msleep(150);
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ret = asix_write_cmd(dev, AX_CMD_WRITE_IPG0,
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AX88772_IPG0_DEFAULT | AX88772_IPG1_DEFAULT,
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AX88772_IPG2_DEFAULT, 0, NULL, 0);
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if (ret < 0) {
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netdev_err(dev->net, "Write IPG,IPG1,IPG2 failed: %d\n", ret);
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goto out;
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}
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/* Rewrite MAC address */
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memcpy(data->mac_addr, dev->net->dev_addr, ETH_ALEN);
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ret = asix_write_cmd(dev, AX_CMD_WRITE_NODE_ID, 0, 0, ETH_ALEN,
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data->mac_addr, 0);
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if (ret < 0)
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goto out;
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/* Set RX_CTL to default values with 2k buffer, and enable cactus */
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ret = asix_write_rx_ctl(dev, AX_DEFAULT_RX_CTL, 0);
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if (ret < 0)
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goto out;
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rx_ctl = asix_read_rx_ctl(dev, 0);
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netdev_dbg(dev->net, "RX_CTL is 0x%04x after all initializations\n",
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rx_ctl);
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rx_ctl = asix_read_medium_status(dev, 0);
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netdev_dbg(dev->net, "Medium Status is 0x%04x after all initializations\n",
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rx_ctl);
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/* Connect to PHY */
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snprintf(priv->phy_name, 20, PHY_ID_FMT,
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priv->mdio->id, priv->phy_addr);
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priv->phydev = phy_connect(dev->net, priv->phy_name,
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&ax88172a_adjust_link,
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PHY_INTERFACE_MODE_MII);
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if (IS_ERR(priv->phydev)) {
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netdev_err(dev->net, "Could not connect to PHY device %s\n",
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priv->phy_name);
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ret = PTR_ERR(priv->phydev);
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goto out;
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}
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netdev_info(dev->net, "Connected to phy %s\n", priv->phy_name);
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/* During power-up, the AX88172A set the power down (BMCR_PDOWN)
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* bit of the PHY. Bring the PHY up again.
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*/
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genphy_resume(priv->phydev);
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phy_start(priv->phydev);
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return 0;
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out:
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return ret;
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}
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static int ax88172a_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
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{
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struct ax88172a_private *dp = dev->driver_priv;
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struct asix_rx_fixup_info *rx = &dp->rx_fixup_info;
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return asix_rx_fixup_internal(dev, skb, rx);
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}
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const struct driver_info ax88172a_info = {
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.description = "ASIX AX88172A USB 2.0 Ethernet",
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.bind = ax88172a_bind,
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.reset = ax88172a_reset,
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.stop = ax88172a_stop,
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.unbind = ax88172a_unbind,
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.status = ax88172a_status,
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.flags = FLAG_ETHER | FLAG_FRAMING_AX | FLAG_LINK_INTR |
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FLAG_MULTI_PACKET,
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.rx_fixup = ax88172a_rx_fixup,
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.tx_fixup = asix_tx_fixup,
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};
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