asix: Add a new driver for the AX88172A
The Asix AX88172A is a USB 2.0 Ethernet interface that supports both an internal PHY as well as an external PHY (connected via MII). This patch adds a driver for the AX88172A and provides support for both modes and the phylib. Signed-off-by: Christian Riesch <christian.riesch@omicron.at> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Christian Riesch
David S. Miller
parent
607740bc16
commit
16626b0cc3
@ -8,7 +8,7 @@ obj-$(CONFIG_USB_PEGASUS) += pegasus.o
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obj-$(CONFIG_USB_RTL8150) += rtl8150.o
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obj-$(CONFIG_USB_HSO) += hso.o
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obj-$(CONFIG_USB_NET_AX8817X) += asix.o
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asix-y := asix_devices.o asix_common.o
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asix-y := asix_devices.o asix_common.o ax88172a.o
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obj-$(CONFIG_USB_NET_CDCETHER) += cdc_ether.o
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obj-$(CONFIG_USB_NET_CDC_EEM) += cdc_eem.o
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obj-$(CONFIG_USB_NET_DM9601) += dm9601.o
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@ -74,6 +74,10 @@
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#define AX_CMD_SW_PHY_STATUS 0x21
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#define AX_CMD_SW_PHY_SELECT 0x22
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#define AX_PHY_SELECT_MASK (BIT(3) | BIT(2))
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#define AX_PHY_SELECT_INTERNAL 0
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#define AX_PHY_SELECT_EXTERNAL BIT(2)
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#define AX_MONITOR_MODE 0x01
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#define AX_MONITOR_LINK 0x02
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#define AX_MONITOR_MAGIC 0x04
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@ -181,6 +185,7 @@ struct sk_buff *asix_tx_fixup(struct usbnet *dev, struct sk_buff *skb,
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int asix_set_sw_mii(struct usbnet *dev);
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int asix_set_hw_mii(struct usbnet *dev);
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int asix_read_phy_addr(struct usbnet *dev, int internal);
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int asix_get_phy_addr(struct usbnet *dev);
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int asix_sw_reset(struct usbnet *dev, u8 flags);
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@ -258,8 +258,9 @@ int asix_set_hw_mii(struct usbnet *dev)
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return ret;
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}
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int asix_get_phy_addr(struct usbnet *dev)
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int asix_read_phy_addr(struct usbnet *dev, int internal)
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{
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int offset = (internal ? 1 : 0);
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u8 buf[2];
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int ret = asix_read_cmd(dev, AX_CMD_READ_PHY_ID, 0, 0, 2, buf);
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@ -271,12 +272,19 @@ int asix_get_phy_addr(struct usbnet *dev)
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}
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netdev_dbg(dev->net, "asix_get_phy_addr() returning 0x%04x\n",
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*((__le16 *)buf));
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ret = buf[1];
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ret = buf[offset];
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out:
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return ret;
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}
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int asix_get_phy_addr(struct usbnet *dev)
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{
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/* return the address of the internal phy */
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return asix_read_phy_addr(dev, 1);
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}
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int asix_sw_reset(struct usbnet *dev, u8 flags)
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{
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int ret;
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@ -872,6 +872,8 @@ static const struct driver_info ax88178_info = {
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.tx_fixup = asix_tx_fixup,
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};
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extern const struct driver_info ax88172a_info;
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static const struct usb_device_id products [] = {
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{
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// Linksys USB200M
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@ -997,6 +999,10 @@ static const struct usb_device_id products [] = {
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// Asus USB Ethernet Adapter
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USB_DEVICE (0x0b95, 0x7e2b),
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.driver_info = (unsigned long) &ax88772_info,
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}, {
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/* ASIX 88172a demo board */
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USB_DEVICE(0x0b95, 0x172a),
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.driver_info = (unsigned long) &ax88172a_info,
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},
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{ }, // END
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};
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415
drivers/net/usb/ax88172a.c
Normal file
415
drivers/net/usb/ax88172a.c
Normal file
@ -0,0 +1,415 @@
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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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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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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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};
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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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static int ax88172a_ioctl(struct net_device *net, struct ifreq *rq, int cmd)
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{
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if (!netif_running(net))
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return -EINVAL;
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if (!net->phydev)
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return -ENODEV;
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return phy_mii_ioctl(net->phydev, rq, cmd);
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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);
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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, i;
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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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priv->mdio->irq = kzalloc(sizeof(int) * PHY_MAX_ADDR, GFP_KERNEL);
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if (!priv->mdio->irq) {
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netdev_err(dev->net, "Could not allocate mdio->irq\n");
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ret = -ENOMEM;
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goto mfree;
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}
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for (i = 0; i < PHY_MAX_ADDR; i++)
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priv->mdio->irq[i] = PHY_POLL;
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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 ifree;
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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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ifree:
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kfree(priv->mdio->irq);
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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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kfree(priv->mdio->irq);
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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_set_mac_address = asix_set_mac_address,
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.ndo_validate_addr = eth_validate_addr,
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.ndo_do_ioctl = ax88172a_ioctl,
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.ndo_set_rx_mode = asix_set_multicast,
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};
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int ax88172a_get_settings(struct net_device *net, struct ethtool_cmd *cmd)
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{
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if (!net->phydev)
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return -ENODEV;
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return phy_ethtool_gset(net->phydev, cmd);
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}
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int ax88172a_set_settings(struct net_device *net, struct ethtool_cmd *cmd)
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{
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if (!net->phydev)
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return -ENODEV;
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return phy_ethtool_sset(net->phydev, cmd);
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}
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int ax88172a_nway_reset(struct net_device *net)
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{
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if (!net->phydev)
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return -ENODEV;
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return phy_start_aneg(net->phydev);
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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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.get_settings = ax88172a_get_settings,
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.set_settings = ax88172a_set_settings,
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.nway_reset = ax88172a_nway_reset,
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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);
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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);
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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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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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struct asix_data *data = (struct asix_data *)&dev->data;
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u8 buf[ETH_ALEN];
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struct ax88172a_private *priv;
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data->eeprom_len = AX88772_EEPROM_LEN;
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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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netdev_err(dev->net, "Could not allocate memory for private data\n");
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return -ENOMEM;
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}
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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);
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if (ret < 0) {
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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);
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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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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);
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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);
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if (ret < 0)
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goto out;
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rx_ctl = asix_read_rx_ctl(dev);
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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);
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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);
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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);
|
||||
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,
|
||||
0, 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;
|
||||
|
||||
}
|
||||
|
||||
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 = asix_rx_fixup,
|
||||
.tx_fixup = asix_tx_fixup,
|
||||
};
|
||||
Loading…
Reference in New Issue
Block a user