Add the rt linux 4.1.3-rt3 as base

Import the rt linux 4.1.3-rt3 as OPNFV kvm base.

It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:

commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date:   Sat Jul 25 12:13:34 2015 +0200

    Prepare v4.1.3-rt3

    Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>

We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.

Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>

1 files changed, 2681 insertions, 0 deletions

diff --git a/kernel/drivers/net/ethernet/smsc/smsc911x.c b/kernel/drivers/net/ethernet/smsc/smsc911x.c
new file mode 100644
index 000000000..959aeeade
--- /dev/null
+++ b/kernel/drivers/net/ethernet/smsc/smsc911x.c
@@ -0,0 +1,2681 @@
+/***************************************************************************
+ *
+ * Copyright (C) 2004-2008 SMSC
+ * Copyright (C) 2005-2008 ARM
+ *
+ * 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/>.
+ *
+ ***************************************************************************
+ * Rewritten, heavily based on smsc911x simple driver by SMSC.
+ * Partly uses io macros from smc91x.c by Nicolas Pitre
+ *
+ * Supported devices:
+ *   LAN9115, LAN9116, LAN9117, LAN9118
+ *   LAN9215, LAN9216, LAN9217, LAN9218
+ *   LAN9210, LAN9211
+ *   LAN9220, LAN9221
+ *   LAN89218
+ *
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/crc32.h>
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/errno.h>
+#include <linux/etherdevice.h>
+#include <linux/ethtool.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/ioport.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/netdevice.h>
+#include <linux/platform_device.h>
+#include <linux/regulator/consumer.h>
+#include <linux/sched.h>
+#include <linux/timer.h>
+#include <linux/bug.h>
+#include <linux/bitops.h>
+#include <linux/irq.h>
+#include <linux/io.h>
+#include <linux/swab.h>
+#include <linux/phy.h>
+#include <linux/smsc911x.h>
+#include <linux/device.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/of_gpio.h>
+#include <linux/of_net.h>
+#include <linux/pm_runtime.h>
+
+#include "smsc911x.h"
+
+#define SMSC_CHIPNAME		"smsc911x"
+#define SMSC_MDIONAME		"smsc911x-mdio"
+#define SMSC_DRV_VERSION	"2008-10-21"
+
+MODULE_LICENSE("GPL");
+MODULE_VERSION(SMSC_DRV_VERSION);
+MODULE_ALIAS("platform:smsc911x");
+
+#if USE_DEBUG > 0
+static int debug = 16;
+#else
+static int debug = 3;
+#endif
+
+module_param(debug, int, 0);
+MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
+
+struct smsc911x_data;
+
+struct smsc911x_ops {
+	u32 (*reg_read)(struct smsc911x_data *pdata, u32 reg);
+	void (*reg_write)(struct smsc911x_data *pdata, u32 reg, u32 val);
+	void (*rx_readfifo)(struct smsc911x_data *pdata,
+				unsigned int *buf, unsigned int wordcount);
+	void (*tx_writefifo)(struct smsc911x_data *pdata,
+				unsigned int *buf, unsigned int wordcount);
+};
+
+#define SMSC911X_NUM_SUPPLIES 2
+
+struct smsc911x_data {
+	void __iomem *ioaddr;
+
+	unsigned int idrev;
+
+	/* used to decide which workarounds apply */
+	unsigned int generation;
+
+	/* device configuration (copied from platform_data during probe) */
+	struct smsc911x_platform_config config;
+
+	/* This needs to be acquired before calling any of below:
+	 * smsc911x_mac_read(), smsc911x_mac_write()
+	 */
+	spinlock_t mac_lock;
+
+	/* spinlock to ensure register accesses are serialised */
+	spinlock_t dev_lock;
+
+	struct phy_device *phy_dev;
+	struct mii_bus *mii_bus;
+	int phy_irq[PHY_MAX_ADDR];
+	unsigned int using_extphy;
+	int last_duplex;
+	int last_carrier;
+
+	u32 msg_enable;
+	unsigned int gpio_setting;
+	unsigned int gpio_orig_setting;
+	struct net_device *dev;
+	struct napi_struct napi;
+
+	unsigned int software_irq_signal;
+
+#ifdef USE_PHY_WORK_AROUND
+#define MIN_PACKET_SIZE (64)
+	char loopback_tx_pkt[MIN_PACKET_SIZE];
+	char loopback_rx_pkt[MIN_PACKET_SIZE];
+	unsigned int resetcount;
+#endif
+
+	/* Members for Multicast filter workaround */
+	unsigned int multicast_update_pending;
+	unsigned int set_bits_mask;
+	unsigned int clear_bits_mask;
+	unsigned int hashhi;
+	unsigned int hashlo;
+
+	/* register access functions */
+	const struct smsc911x_ops *ops;
+
+	/* regulators */
+	struct regulator_bulk_data supplies[SMSC911X_NUM_SUPPLIES];
+
+	/* clock */
+	struct clk *clk;
+};
+
+/* Easy access to information */
+#define __smsc_shift(pdata, reg) ((reg) << ((pdata)->config.shift))
+
+static inline u32 __smsc911x_reg_read(struct smsc911x_data *pdata, u32 reg)
+{
+	if (pdata->config.flags & SMSC911X_USE_32BIT)
+		return readl(pdata->ioaddr + reg);
+
+	if (pdata->config.flags & SMSC911X_USE_16BIT)
+		return ((readw(pdata->ioaddr + reg) & 0xFFFF) |
+			((readw(pdata->ioaddr + reg + 2) & 0xFFFF) << 16));
+
+	BUG();
+	return 0;
+}
+
+static inline u32
+__smsc911x_reg_read_shift(struct smsc911x_data *pdata, u32 reg)
+{
+	if (pdata->config.flags & SMSC911X_USE_32BIT)
+		return readl(pdata->ioaddr + __smsc_shift(pdata, reg));
+
+	if (pdata->config.flags & SMSC911X_USE_16BIT)
+		return (readw(pdata->ioaddr +
+				__smsc_shift(pdata, reg)) & 0xFFFF) |
+			((readw(pdata->ioaddr +
+			__smsc_shift(pdata, reg + 2)) & 0xFFFF) << 16);
+
+	BUG();
+	return 0;
+}
+
+static inline u32 smsc911x_reg_read(struct smsc911x_data *pdata, u32 reg)
+{
+	u32 data;
+	unsigned long flags;
+
+	spin_lock_irqsave(&pdata->dev_lock, flags);
+	data = pdata->ops->reg_read(pdata, reg);
+	spin_unlock_irqrestore(&pdata->dev_lock, flags);
+
+	return data;
+}
+
+static inline void __smsc911x_reg_write(struct smsc911x_data *pdata, u32 reg,
+					u32 val)
+{
+	if (pdata->config.flags & SMSC911X_USE_32BIT) {
+		writel(val, pdata->ioaddr + reg);
+		return;
+	}
+
+	if (pdata->config.flags & SMSC911X_USE_16BIT) {
+		writew(val & 0xFFFF, pdata->ioaddr + reg);
+		writew((val >> 16) & 0xFFFF, pdata->ioaddr + reg + 2);
+		return;
+	}
+
+	BUG();
+}
+
+static inline void
+__smsc911x_reg_write_shift(struct smsc911x_data *pdata, u32 reg, u32 val)
+{
+	if (pdata->config.flags & SMSC911X_USE_32BIT) {
+		writel(val, pdata->ioaddr + __smsc_shift(pdata, reg));
+		return;
+	}
+
+	if (pdata->config.flags & SMSC911X_USE_16BIT) {
+		writew(val & 0xFFFF,
+			pdata->ioaddr + __smsc_shift(pdata, reg));
+		writew((val >> 16) & 0xFFFF,
+			pdata->ioaddr + __smsc_shift(pdata, reg + 2));
+		return;
+	}
+
+	BUG();
+}
+
+static inline void smsc911x_reg_write(struct smsc911x_data *pdata, u32 reg,
+				      u32 val)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&pdata->dev_lock, flags);
+	pdata->ops->reg_write(pdata, reg, val);
+	spin_unlock_irqrestore(&pdata->dev_lock, flags);
+}
+
+/* Writes a packet to the TX_DATA_FIFO */
+static inline void
+smsc911x_tx_writefifo(struct smsc911x_data *pdata, unsigned int *buf,
+		      unsigned int wordcount)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&pdata->dev_lock, flags);
+
+	if (pdata->config.flags & SMSC911X_SWAP_FIFO) {
+		while (wordcount--)
+			__smsc911x_reg_write(pdata, TX_DATA_FIFO,
+					     swab32(*buf++));
+		goto out;
+	}
+
+	if (pdata->config.flags & SMSC911X_USE_32BIT) {
+		iowrite32_rep(pdata->ioaddr + TX_DATA_FIFO, buf, wordcount);
+		goto out;
+	}
+
+	if (pdata->config.flags & SMSC911X_USE_16BIT) {
+		while (wordcount--)
+			__smsc911x_reg_write(pdata, TX_DATA_FIFO, *buf++);
+		goto out;
+	}
+
+	BUG();
+out:
+	spin_unlock_irqrestore(&pdata->dev_lock, flags);
+}
+
+/* Writes a packet to the TX_DATA_FIFO - shifted version */
+static inline void
+smsc911x_tx_writefifo_shift(struct smsc911x_data *pdata, unsigned int *buf,
+		      unsigned int wordcount)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&pdata->dev_lock, flags);
+
+	if (pdata->config.flags & SMSC911X_SWAP_FIFO) {
+		while (wordcount--)
+			__smsc911x_reg_write_shift(pdata, TX_DATA_FIFO,
+					     swab32(*buf++));
+		goto out;
+	}
+
+	if (pdata->config.flags & SMSC911X_USE_32BIT) {
+		iowrite32_rep(pdata->ioaddr + __smsc_shift(pdata,
+						TX_DATA_FIFO), buf, wordcount);
+		goto out;
+	}
+
+	if (pdata->config.flags & SMSC911X_USE_16BIT) {
+		while (wordcount--)
+			__smsc911x_reg_write_shift(pdata,
+						 TX_DATA_FIFO, *buf++);
+		goto out;
+	}
+
+	BUG();
+out:
+	spin_unlock_irqrestore(&pdata->dev_lock, flags);
+}
+
+/* Reads a packet out of the RX_DATA_FIFO */
+static inline void
+smsc911x_rx_readfifo(struct smsc911x_data *pdata, unsigned int *buf,
+		     unsigned int wordcount)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&pdata->dev_lock, flags);
+
+	if (pdata->config.flags & SMSC911X_SWAP_FIFO) {
+		while (wordcount--)
+			*buf++ = swab32(__smsc911x_reg_read(pdata,
+							    RX_DATA_FIFO));
+		goto out;
+	}
+
+	if (pdata->config.flags & SMSC911X_USE_32BIT) {
+		ioread32_rep(pdata->ioaddr + RX_DATA_FIFO, buf, wordcount);
+		goto out;
+	}
+
+	if (pdata->config.flags & SMSC911X_USE_16BIT) {
+		while (wordcount--)
+			*buf++ = __smsc911x_reg_read(pdata, RX_DATA_FIFO);
+		goto out;
+	}
+
+	BUG();
+out:
+	spin_unlock_irqrestore(&pdata->dev_lock, flags);
+}
+
+/* Reads a packet out of the RX_DATA_FIFO - shifted version */
+static inline void
+smsc911x_rx_readfifo_shift(struct smsc911x_data *pdata, unsigned int *buf,
+		     unsigned int wordcount)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&pdata->dev_lock, flags);
+
+	if (pdata->config.flags & SMSC911X_SWAP_FIFO) {
+		while (wordcount--)
+			*buf++ = swab32(__smsc911x_reg_read_shift(pdata,
+							    RX_DATA_FIFO));
+		goto out;
+	}
+
+	if (pdata->config.flags & SMSC911X_USE_32BIT) {
+		ioread32_rep(pdata->ioaddr + __smsc_shift(pdata,
+						RX_DATA_FIFO), buf, wordcount);
+		goto out;
+	}
+
+	if (pdata->config.flags & SMSC911X_USE_16BIT) {
+		while (wordcount--)
+			*buf++ = __smsc911x_reg_read_shift(pdata,
+								RX_DATA_FIFO);
+		goto out;
+	}
+
+	BUG();
+out:
+	spin_unlock_irqrestore(&pdata->dev_lock, flags);
+}
+
+/*
+ * enable regulator and clock resources.
+ */
+static int smsc911x_enable_resources(struct platform_device *pdev)
+{
+	struct net_device *ndev = platform_get_drvdata(pdev);
+	struct smsc911x_data *pdata = netdev_priv(ndev);
+	int ret = 0;
+
+	ret = regulator_bulk_enable(ARRAY_SIZE(pdata->supplies),
+			pdata->supplies);
+	if (ret)
+		netdev_err(ndev, "failed to enable regulators %d\n",
+				ret);
+
+	if (!IS_ERR(pdata->clk)) {
+		ret = clk_prepare_enable(pdata->clk);
+		if (ret < 0)
+			netdev_err(ndev, "failed to enable clock %d\n", ret);
+	}
+
+	return ret;
+}
+
+/*
+ * disable resources, currently just regulators.
+ */
+static int smsc911x_disable_resources(struct platform_device *pdev)
+{
+	struct net_device *ndev = platform_get_drvdata(pdev);
+	struct smsc911x_data *pdata = netdev_priv(ndev);
+	int ret = 0;
+
+	ret = regulator_bulk_disable(ARRAY_SIZE(pdata->supplies),
+			pdata->supplies);
+
+	if (!IS_ERR(pdata->clk))
+		clk_disable_unprepare(pdata->clk);
+
+	return ret;
+}
+
+/*
+ * Request resources, currently just regulators.
+ *
+ * The SMSC911x has two power pins: vddvario and vdd33a, in designs where
+ * these are not always-on we need to request regulators to be turned on
+ * before we can try to access the device registers.
+ */
+static int smsc911x_request_resources(struct platform_device *pdev)
+{
+	struct net_device *ndev = platform_get_drvdata(pdev);
+	struct smsc911x_data *pdata = netdev_priv(ndev);
+	int ret = 0;
+
+	/* Request regulators */
+	pdata->supplies[0].supply = "vdd33a";
+	pdata->supplies[1].supply = "vddvario";
+	ret = regulator_bulk_get(&pdev->dev,
+			ARRAY_SIZE(pdata->supplies),
+			pdata->supplies);
+	if (ret)
+		netdev_err(ndev, "couldn't get regulators %d\n",
+				ret);
+
+	/* Request clock */
+	pdata->clk = clk_get(&pdev->dev, NULL);
+	if (IS_ERR(pdata->clk))
+		dev_dbg(&pdev->dev, "couldn't get clock %li\n",
+			PTR_ERR(pdata->clk));
+
+	return ret;
+}
+
+/*
+ * Free resources, currently just regulators.
+ *
+ */
+static void smsc911x_free_resources(struct platform_device *pdev)
+{
+	struct net_device *ndev = platform_get_drvdata(pdev);
+	struct smsc911x_data *pdata = netdev_priv(ndev);
+
+	/* Free regulators */
+	regulator_bulk_free(ARRAY_SIZE(pdata->supplies),
+			pdata->supplies);
+
+	/* Free clock */
+	if (!IS_ERR(pdata->clk)) {
+		clk_put(pdata->clk);
+		pdata->clk = NULL;
+	}
+}
+
+/* waits for MAC not busy, with timeout.  Only called by smsc911x_mac_read
+ * and smsc911x_mac_write, so assumes mac_lock is held */
+static int smsc911x_mac_complete(struct smsc911x_data *pdata)
+{
+	int i;
+	u32 val;
+
+	SMSC_ASSERT_MAC_LOCK(pdata);
+
+	for (i = 0; i < 40; i++) {
+		val = smsc911x_reg_read(pdata, MAC_CSR_CMD);
+		if (!(val & MAC_CSR_CMD_CSR_BUSY_))
+			return 0;
+	}
+	SMSC_WARN(pdata, hw, "Timed out waiting for MAC not BUSY. "
+		  "MAC_CSR_CMD: 0x%08X", val);
+	return -EIO;
+}
+
+/* Fetches a MAC register value. Assumes mac_lock is acquired */
+static u32 smsc911x_mac_read(struct smsc911x_data *pdata, unsigned int offset)
+{
+	unsigned int temp;
+
+	SMSC_ASSERT_MAC_LOCK(pdata);
+
+	temp = smsc911x_reg_read(pdata, MAC_CSR_CMD);
+	if (unlikely(temp & MAC_CSR_CMD_CSR_BUSY_)) {
+		SMSC_WARN(pdata, hw, "MAC busy at entry");
+		return 0xFFFFFFFF;
+	}
+
+	/* Send the MAC cmd */
+	smsc911x_reg_write(pdata, MAC_CSR_CMD, ((offset & 0xFF) |
+		MAC_CSR_CMD_CSR_BUSY_ | MAC_CSR_CMD_R_NOT_W_));
+
+	/* Workaround for hardware read-after-write restriction */
+	temp = smsc911x_reg_read(pdata, BYTE_TEST);
+
+	/* Wait for the read to complete */
+	if (likely(smsc911x_mac_complete(pdata) == 0))
+		return smsc911x_reg_read(pdata, MAC_CSR_DATA);
+
+	SMSC_WARN(pdata, hw, "MAC busy after read");
+	return 0xFFFFFFFF;
+}
+
+/* Set a mac register, mac_lock must be acquired before calling */
+static void smsc911x_mac_write(struct smsc911x_data *pdata,
+			       unsigned int offset, u32 val)
+{
+	unsigned int temp;
+
+	SMSC_ASSERT_MAC_LOCK(pdata);
+
+	temp = smsc911x_reg_read(pdata, MAC_CSR_CMD);
+	if (unlikely(temp & MAC_CSR_CMD_CSR_BUSY_)) {
+		SMSC_WARN(pdata, hw,
+			  "smsc911x_mac_write failed, MAC busy at entry");
+		return;
+	}
+
+	/* Send data to write */
+	smsc911x_reg_write(pdata, MAC_CSR_DATA, val);
+
+	/* Write the actual data */
+	smsc911x_reg_write(pdata, MAC_CSR_CMD, ((offset & 0xFF) |
+		MAC_CSR_CMD_CSR_BUSY_));
+
+	/* Workaround for hardware read-after-write restriction */
+	temp = smsc911x_reg_read(pdata, BYTE_TEST);
+
+	/* Wait for the write to complete */
+	if (likely(smsc911x_mac_complete(pdata) == 0))
+		return;
+
+	SMSC_WARN(pdata, hw, "smsc911x_mac_write failed, MAC busy after write");
+}
+
+/* Get a phy register */
+static int smsc911x_mii_read(struct mii_bus *bus, int phyaddr, int regidx)
+{
+	struct smsc911x_data *pdata = (struct smsc911x_data *)bus->priv;
+	unsigned long flags;
+	unsigned int addr;
+	int i, reg;
+
+	spin_lock_irqsave(&pdata->mac_lock, flags);
+
+	/* Confirm MII not busy */
+	if (unlikely(smsc911x_mac_read(pdata, MII_ACC) & MII_ACC_MII_BUSY_)) {
+		SMSC_WARN(pdata, hw, "MII is busy in smsc911x_mii_read???");
+		reg = -EIO;
+		goto out;
+	}
+
+	/* Set the address, index & direction (read from PHY) */
+	addr = ((phyaddr & 0x1F) << 11) | ((regidx & 0x1F) << 6);
+	smsc911x_mac_write(pdata, MII_ACC, addr);
+
+	/* Wait for read to complete w/ timeout */
+	for (i = 0; i < 100; i++)
+		if (!(smsc911x_mac_read(pdata, MII_ACC) & MII_ACC_MII_BUSY_)) {
+			reg = smsc911x_mac_read(pdata, MII_DATA);
+			goto out;
+		}
+
+	SMSC_WARN(pdata, hw, "Timed out waiting for MII read to finish");
+	reg = -EIO;
+
+out:
+	spin_unlock_irqrestore(&pdata->mac_lock, flags);
+	return reg;
+}
+
+/* Set a phy register */
+static int smsc911x_mii_write(struct mii_bus *bus, int phyaddr, int regidx,
+			   u16 val)
+{
+	struct smsc911x_data *pdata = (struct smsc911x_data *)bus->priv;
+	unsigned long flags;
+	unsigned int addr;
+	int i, reg;
+
+	spin_lock_irqsave(&pdata->mac_lock, flags);
+
+	/* Confirm MII not busy */
+	if (unlikely(smsc911x_mac_read(pdata, MII_ACC) & MII_ACC_MII_BUSY_)) {
+		SMSC_WARN(pdata, hw, "MII is busy in smsc911x_mii_write???");
+		reg = -EIO;
+		goto out;
+	}
+
+	/* Put the data to write in the MAC */
+	smsc911x_mac_write(pdata, MII_DATA, val);
+
+	/* Set the address, index & direction (write to PHY) */
+	addr = ((phyaddr & 0x1F) << 11) | ((regidx & 0x1F) << 6) |
+		MII_ACC_MII_WRITE_;
+	smsc911x_mac_write(pdata, MII_ACC, addr);
+
+	/* Wait for write to complete w/ timeout */
+	for (i = 0; i < 100; i++)
+		if (!(smsc911x_mac_read(pdata, MII_ACC) & MII_ACC_MII_BUSY_)) {
+			reg = 0;
+			goto out;
+		}
+
+	SMSC_WARN(pdata, hw, "Timed out waiting for MII write to finish");
+	reg = -EIO;
+
+out:
+	spin_unlock_irqrestore(&pdata->mac_lock, flags);
+	return reg;
+}
+
+/* Switch to external phy. Assumes tx and rx are stopped. */
+static void smsc911x_phy_enable_external(struct smsc911x_data *pdata)
+{
+	unsigned int hwcfg = smsc911x_reg_read(pdata, HW_CFG);
+
+	/* Disable phy clocks to the MAC */
+	hwcfg &= (~HW_CFG_PHY_CLK_SEL_);
+	hwcfg |= HW_CFG_PHY_CLK_SEL_CLK_DIS_;
+	smsc911x_reg_write(pdata, HW_CFG, hwcfg);
+	udelay(10);	/* Enough time for clocks to stop */
+
+	/* Switch to external phy */
+	hwcfg |= HW_CFG_EXT_PHY_EN_;
+	smsc911x_reg_write(pdata, HW_CFG, hwcfg);
+
+	/* Enable phy clocks to the MAC */
+	hwcfg &= (~HW_CFG_PHY_CLK_SEL_);
+	hwcfg |= HW_CFG_PHY_CLK_SEL_EXT_PHY_;
+	smsc911x_reg_write(pdata, HW_CFG, hwcfg);
+	udelay(10);	/* Enough time for clocks to restart */
+
+	hwcfg |= HW_CFG_SMI_SEL_;
+	smsc911x_reg_write(pdata, HW_CFG, hwcfg);
+}
+
+/* Autodetects and enables external phy if present on supported chips.
+ * autodetection can be overridden by specifying SMSC911X_FORCE_INTERNAL_PHY
+ * or SMSC911X_FORCE_EXTERNAL_PHY in the platform_data flags. */
+static void smsc911x_phy_initialise_external(struct smsc911x_data *pdata)
+{
+	unsigned int hwcfg = smsc911x_reg_read(pdata, HW_CFG);
+
+	if (pdata->config.flags & SMSC911X_FORCE_INTERNAL_PHY) {
+		SMSC_TRACE(pdata, hw, "Forcing internal PHY");
+		pdata->using_extphy = 0;
+	} else if (pdata->config.flags & SMSC911X_FORCE_EXTERNAL_PHY) {
+		SMSC_TRACE(pdata, hw, "Forcing external PHY");
+		smsc911x_phy_enable_external(pdata);
+		pdata->using_extphy = 1;
+	} else if (hwcfg & HW_CFG_EXT_PHY_DET_) {
+		SMSC_TRACE(pdata, hw,
+			   "HW_CFG EXT_PHY_DET set, using external PHY");
+		smsc911x_phy_enable_external(pdata);
+		pdata->using_extphy = 1;
+	} else {
+		SMSC_TRACE(pdata, hw,
+			   "HW_CFG EXT_PHY_DET clear, using internal PHY");
+		pdata->using_extphy = 0;
+	}
+}
+
+/* Fetches a tx status out of the status fifo */
+static unsigned int smsc911x_tx_get_txstatus(struct smsc911x_data *pdata)
+{
+	unsigned int result =
+	    smsc911x_reg_read(pdata, TX_FIFO_INF) & TX_FIFO_INF_TSUSED_;
+
+	if (result != 0)
+		result = smsc911x_reg_read(pdata, TX_STATUS_FIFO);
+
+	return result;
+}
+
+/* Fetches the next rx status */
+static unsigned int smsc911x_rx_get_rxstatus(struct smsc911x_data *pdata)
+{
+	unsigned int result =
+	    smsc911x_reg_read(pdata, RX_FIFO_INF) & RX_FIFO_INF_RXSUSED_;
+
+	if (result != 0)
+		result = smsc911x_reg_read(pdata, RX_STATUS_FIFO);
+
+	return result;
+}
+
+#ifdef USE_PHY_WORK_AROUND
+static int smsc911x_phy_check_loopbackpkt(struct smsc911x_data *pdata)
+{
+	unsigned int tries;
+	u32 wrsz;
+	u32 rdsz;
+	ulong bufp;
+
+	for (tries = 0; tries < 10; tries++) {
+		unsigned int txcmd_a;
+		unsigned int txcmd_b;
+		unsigned int status;
+		unsigned int pktlength;
+		unsigned int i;
+
+		/* Zero-out rx packet memory */
+		memset(pdata->loopback_rx_pkt, 0, MIN_PACKET_SIZE);
+
+		/* Write tx packet to 118 */
+		txcmd_a = (u32)((ulong)pdata->loopback_tx_pkt & 0x03) << 16;
+		txcmd_a |= TX_CMD_A_FIRST_SEG_ | TX_CMD_A_LAST_SEG_;
+		txcmd_a |= MIN_PACKET_SIZE;
+
+		txcmd_b = MIN_PACKET_SIZE << 16 | MIN_PACKET_SIZE;
+
+		smsc911x_reg_write(pdata, TX_DATA_FIFO, txcmd_a);
+		smsc911x_reg_write(pdata, TX_DATA_FIFO, txcmd_b);
+
+		bufp = (ulong)pdata->loopback_tx_pkt & (~0x3);
+		wrsz = MIN_PACKET_SIZE + 3;
+		wrsz += (u32)((ulong)pdata->loopback_tx_pkt & 0x3);
+		wrsz >>= 2;
+
+		pdata->ops->tx_writefifo(pdata, (unsigned int *)bufp, wrsz);
+
+		/* Wait till transmit is done */
+		i = 60;
+		do {
+			udelay(5);
+			status = smsc911x_tx_get_txstatus(pdata);
+		} while ((i--) && (!status));
+
+		if (!status) {
+			SMSC_WARN(pdata, hw,
+				  "Failed to transmit during loopback test");
+			continue;
+		}
+		if (status & TX_STS_ES_) {
+			SMSC_WARN(pdata, hw,
+				  "Transmit encountered errors during loopback test");
+			continue;
+		}
+
+		/* Wait till receive is done */
+		i = 60;
+		do {
+			udelay(5);
+			status = smsc911x_rx_get_rxstatus(pdata);
+		} while ((i--) && (!status));
+
+		if (!status) {
+			SMSC_WARN(pdata, hw,
+				  "Failed to receive during loopback test");
+			continue;
+		}
+		if (status & RX_STS_ES_) {
+			SMSC_WARN(pdata, hw,
+				  "Receive encountered errors during loopback test");
+			continue;
+		}
+
+		pktlength = ((status & 0x3FFF0000UL) >> 16);
+		bufp = (ulong)pdata->loopback_rx_pkt;
+		rdsz = pktlength + 3;
+		rdsz += (u32)((ulong)pdata->loopback_rx_pkt & 0x3);
+		rdsz >>= 2;
+
+		pdata->ops->rx_readfifo(pdata, (unsigned int *)bufp, rdsz);
+
+		if (pktlength != (MIN_PACKET_SIZE + 4)) {
+			SMSC_WARN(pdata, hw, "Unexpected packet size "
+				  "during loop back test, size=%d, will retry",
+				  pktlength);
+		} else {
+			unsigned int j;
+			int mismatch = 0;
+			for (j = 0; j < MIN_PACKET_SIZE; j++) {
+				if (pdata->loopback_tx_pkt[j]
+				    != pdata->loopback_rx_pkt[j]) {
+					mismatch = 1;
+					break;
+				}
+			}
+			if (!mismatch) {
+				SMSC_TRACE(pdata, hw, "Successfully verified "
+					   "loopback packet");
+				return 0;
+			} else {
+				SMSC_WARN(pdata, hw, "Data mismatch "
+					  "during loop back test, will retry");
+			}
+		}
+	}
+
+	return -EIO;
+}
+
+static int smsc911x_phy_reset(struct smsc911x_data *pdata)
+{
+	struct phy_device *phy_dev = pdata->phy_dev;
+	unsigned int temp;
+	unsigned int i = 100000;
+
+	BUG_ON(!phy_dev);
+	BUG_ON(!phy_dev->bus);
+
+	SMSC_TRACE(pdata, hw, "Performing PHY BCR Reset");
+	smsc911x_mii_write(phy_dev->bus, phy_dev->addr, MII_BMCR, BMCR_RESET);
+	do {
+		msleep(1);
+		temp = smsc911x_mii_read(phy_dev->bus, phy_dev->addr,
+			MII_BMCR);
+	} while ((i--) && (temp & BMCR_RESET));
+
+	if (temp & BMCR_RESET) {
+		SMSC_WARN(pdata, hw, "PHY reset failed to complete");
+		return -EIO;
+	}
+	/* Extra delay required because the phy may not be completed with
+	* its reset when BMCR_RESET is cleared. Specs say 256 uS is
+	* enough delay but using 1ms here to be safe */
+	msleep(1);
+
+	return 0;
+}
+
+static int smsc911x_phy_loopbacktest(struct net_device *dev)
+{
+	struct smsc911x_data *pdata = netdev_priv(dev);
+	struct phy_device *phy_dev = pdata->phy_dev;
+	int result = -EIO;
+	unsigned int i, val;
+	unsigned long flags;
+
+	/* Initialise tx packet using broadcast destination address */
+	eth_broadcast_addr(pdata->loopback_tx_pkt);
+
+	/* Use incrementing source address */
+	for (i = 6; i < 12; i++)
+		pdata->loopback_tx_pkt[i] = (char)i;
+
+	/* Set length type field */
+	pdata->loopback_tx_pkt[12] = 0x00;
+	pdata->loopback_tx_pkt[13] = 0x00;
+
+	for (i = 14; i < MIN_PACKET_SIZE; i++)
+		pdata->loopback_tx_pkt[i] = (char)i;
+
+	val = smsc911x_reg_read(pdata, HW_CFG);
+	val &= HW_CFG_TX_FIF_SZ_;
+	val |= HW_CFG_SF_;
+	smsc911x_reg_write(pdata, HW_CFG, val);
+
+	smsc911x_reg_write(pdata, TX_CFG, TX_CFG_TX_ON_);
+	smsc911x_reg_write(pdata, RX_CFG,
+		(u32)((ulong)pdata->loopback_rx_pkt & 0x03) << 8);
+
+	for (i = 0; i < 10; i++) {
+		/* Set PHY to 10/FD, no ANEG, and loopback mode */
+		smsc911x_mii_write(phy_dev->bus, phy_dev->addr,	MII_BMCR,
+			BMCR_LOOPBACK | BMCR_FULLDPLX);
+
+		/* Enable MAC tx/rx, FD */
+		spin_lock_irqsave(&pdata->mac_lock, flags);
+		smsc911x_mac_write(pdata, MAC_CR, MAC_CR_FDPX_
+				   | MAC_CR_TXEN_ | MAC_CR_RXEN_);
+		spin_unlock_irqrestore(&pdata->mac_lock, flags);
+
+		if (smsc911x_phy_check_loopbackpkt(pdata) == 0) {
+			result = 0;
+			break;
+		}
+		pdata->resetcount++;
+
+		/* Disable MAC rx */
+		spin_lock_irqsave(&pdata->mac_lock, flags);
+		smsc911x_mac_write(pdata, MAC_CR, 0);
+		spin_unlock_irqrestore(&pdata->mac_lock, flags);
+
+		smsc911x_phy_reset(pdata);
+	}
+
+	/* Disable MAC */
+	spin_lock_irqsave(&pdata->mac_lock, flags);
+	smsc911x_mac_write(pdata, MAC_CR, 0);
+	spin_unlock_irqrestore(&pdata->mac_lock, flags);
+
+	/* Cancel PHY loopback mode */
+	smsc911x_mii_write(phy_dev->bus, phy_dev->addr, MII_BMCR, 0);
+
+	smsc911x_reg_write(pdata, TX_CFG, 0);
+	smsc911x_reg_write(pdata, RX_CFG, 0);
+
+	return result;
+}
+#endif				/* USE_PHY_WORK_AROUND */
+
+static void smsc911x_phy_update_flowcontrol(struct smsc911x_data *pdata)
+{
+	struct phy_device *phy_dev = pdata->phy_dev;
+	u32 afc = smsc911x_reg_read(pdata, AFC_CFG);
+	u32 flow;
+	unsigned long flags;
+
+	if (phy_dev->duplex == DUPLEX_FULL) {
+		u16 lcladv = phy_read(phy_dev, MII_ADVERTISE);
+		u16 rmtadv = phy_read(phy_dev, MII_LPA);
+		u8 cap = mii_resolve_flowctrl_fdx(lcladv, rmtadv);
+
+		if (cap & FLOW_CTRL_RX)
+			flow = 0xFFFF0002;
+		else
+			flow = 0;
+
+		if (cap & FLOW_CTRL_TX)
+			afc |= 0xF;
+		else
+			afc &= ~0xF;
+
+		SMSC_TRACE(pdata, hw, "rx pause %s, tx pause %s",
+			   (cap & FLOW_CTRL_RX ? "enabled" : "disabled"),
+			   (cap & FLOW_CTRL_TX ? "enabled" : "disabled"));
+	} else {
+		SMSC_TRACE(pdata, hw, "half duplex");
+		flow = 0;
+		afc |= 0xF;
+	}
+
+	spin_lock_irqsave(&pdata->mac_lock, flags);
+	smsc911x_mac_write(pdata, FLOW, flow);
+	spin_unlock_irqrestore(&pdata->mac_lock, flags);
+
+	smsc911x_reg_write(pdata, AFC_CFG, afc);
+}
+
+/* Update link mode if anything has changed.  Called periodically when the
+ * PHY is in polling mode, even if nothing has changed. */
+static void smsc911x_phy_adjust_link(struct net_device *dev)
+{
+	struct smsc911x_data *pdata = netdev_priv(dev);
+	struct phy_device *phy_dev = pdata->phy_dev;
+	unsigned long flags;
+	int carrier;
+
+	if (phy_dev->duplex != pdata->last_duplex) {
+		unsigned int mac_cr;
+		SMSC_TRACE(pdata, hw, "duplex state has changed");
+
+		spin_lock_irqsave(&pdata->mac_lock, flags);
+		mac_cr = smsc911x_mac_read(pdata, MAC_CR);
+		if (phy_dev->duplex) {
+			SMSC_TRACE(pdata, hw,
+				   "configuring for full duplex mode");
+			mac_cr |= MAC_CR_FDPX_;
+		} else {
+			SMSC_TRACE(pdata, hw,
+				   "configuring for half duplex mode");
+			mac_cr &= ~MAC_CR_FDPX_;
+		}
+		smsc911x_mac_write(pdata, MAC_CR, mac_cr);
+		spin_unlock_irqrestore(&pdata->mac_lock, flags);
+
+		smsc911x_phy_update_flowcontrol(pdata);
+		pdata->last_duplex = phy_dev->duplex;
+	}
+
+	carrier = netif_carrier_ok(dev);
+	if (carrier != pdata->last_carrier) {
+		SMSC_TRACE(pdata, hw, "carrier state has changed");
+		if (carrier) {
+			SMSC_TRACE(pdata, hw, "configuring for carrier OK");
+			if ((pdata->gpio_orig_setting & GPIO_CFG_LED1_EN_) &&
+			    (!pdata->using_extphy)) {
+				/* Restore original GPIO configuration */
+				pdata->gpio_setting = pdata->gpio_orig_setting;
+				smsc911x_reg_write(pdata, GPIO_CFG,
+					pdata->gpio_setting);
+			}
+		} else {
+			SMSC_TRACE(pdata, hw, "configuring for no carrier");
+			/* Check global setting that LED1
+			 * usage is 10/100 indicator */
+			pdata->gpio_setting = smsc911x_reg_read(pdata,
+				GPIO_CFG);
+			if ((pdata->gpio_setting & GPIO_CFG_LED1_EN_) &&
+			    (!pdata->using_extphy)) {
+				/* Force 10/100 LED off, after saving
+				 * original GPIO configuration */
+				pdata->gpio_orig_setting = pdata->gpio_setting;
+
+				pdata->gpio_setting &= ~GPIO_CFG_LED1_EN_;
+				pdata->gpio_setting |= (GPIO_CFG_GPIOBUF0_
+							| GPIO_CFG_GPIODIR0_
+							| GPIO_CFG_GPIOD0_);
+				smsc911x_reg_write(pdata, GPIO_CFG,
+					pdata->gpio_setting);
+			}
+		}
+		pdata->last_carrier = carrier;
+	}
+}
+
+static int smsc911x_mii_probe(struct net_device *dev)
+{
+	struct smsc911x_data *pdata = netdev_priv(dev);
+	struct phy_device *phydev = NULL;
+	int ret;
+
+	/* find the first phy */
+	phydev = phy_find_first(pdata->mii_bus);
+	if (!phydev) {
+		netdev_err(dev, "no PHY found\n");
+		return -ENODEV;
+	}
+
+	SMSC_TRACE(pdata, probe, "PHY: addr %d, phy_id 0x%08X",
+		   phydev->addr, phydev->phy_id);
+
+	ret = phy_connect_direct(dev, phydev, &smsc911x_phy_adjust_link,
+				 pdata->config.phy_interface);
+
+	if (ret) {
+		netdev_err(dev, "Could not attach to PHY\n");
+		return ret;
+	}
+
+	netdev_info(dev,
+		    "attached PHY driver [%s] (mii_bus:phy_addr=%s, irq=%d)\n",
+		    phydev->drv->name, dev_name(&phydev->dev), phydev->irq);
+
+	/* mask with MAC supported features */
+	phydev->supported &= (PHY_BASIC_FEATURES | SUPPORTED_Pause |
+			      SUPPORTED_Asym_Pause);
+	phydev->advertising = phydev->supported;
+
+	pdata->phy_dev = phydev;
+	pdata->last_duplex = -1;
+	pdata->last_carrier = -1;
+
+#ifdef USE_PHY_WORK_AROUND
+	if (smsc911x_phy_loopbacktest(dev) < 0) {
+		SMSC_WARN(pdata, hw, "Failed Loop Back Test");
+		return -ENODEV;
+	}
+	SMSC_TRACE(pdata, hw, "Passed Loop Back Test");
+#endif				/* USE_PHY_WORK_AROUND */
+
+	SMSC_TRACE(pdata, hw, "phy initialised successfully");
+	return 0;
+}
+
+static int smsc911x_mii_init(struct platform_device *pdev,
+			     struct net_device *dev)
+{
+	struct smsc911x_data *pdata = netdev_priv(dev);
+	int err = -ENXIO, i;
+
+	pdata->mii_bus = mdiobus_alloc();
+	if (!pdata->mii_bus) {
+		err = -ENOMEM;
+		goto err_out_1;
+	}
+
+	pdata->mii_bus->name = SMSC_MDIONAME;
+	snprintf(pdata->mii_bus->id, MII_BUS_ID_SIZE, "%s-%x",
+		pdev->name, pdev->id);
+	pdata->mii_bus->priv = pdata;
+	pdata->mii_bus->read = smsc911x_mii_read;
+	pdata->mii_bus->write = smsc911x_mii_write;
+	pdata->mii_bus->irq = pdata->phy_irq;
+	for (i = 0; i < PHY_MAX_ADDR; ++i)
+		pdata->mii_bus->irq[i] = PHY_POLL;
+
+	pdata->mii_bus->parent = &pdev->dev;
+
+	switch (pdata->idrev & 0xFFFF0000) {
+	case 0x01170000:
+	case 0x01150000:
+	case 0x117A0000:
+	case 0x115A0000:
+		/* External PHY supported, try to autodetect */
+		smsc911x_phy_initialise_external(pdata);
+		break;
+	default:
+		SMSC_TRACE(pdata, hw, "External PHY is not supported, "
+			   "using internal PHY");
+		pdata->using_extphy = 0;
+		break;
+	}
+
+	if (!pdata->using_extphy) {
+		/* Mask all PHYs except ID 1 (internal) */
+		pdata->mii_bus->phy_mask = ~(1 << 1);
+	}
+
+	if (mdiobus_register(pdata->mii_bus)) {
+		SMSC_WARN(pdata, probe, "Error registering mii bus");
+		goto err_out_free_bus_2;
+	}
+
+	if (smsc911x_mii_probe(dev) < 0) {
+		SMSC_WARN(pdata, probe, "Error registering mii bus");
+		goto err_out_unregister_bus_3;
+	}
+
+	return 0;
+
+err_out_unregister_bus_3:
+	mdiobus_unregister(pdata->mii_bus);
+err_out_free_bus_2:
+	mdiobus_free(pdata->mii_bus);
+err_out_1:
+	return err;
+}
+
+/* Gets the number of tx statuses in the fifo */
+static unsigned int smsc911x_tx_get_txstatcount(struct smsc911x_data *pdata)
+{
+	return (smsc911x_reg_read(pdata, TX_FIFO_INF)
+		& TX_FIFO_INF_TSUSED_) >> 16;
+}
+
+/* Reads tx statuses and increments counters where necessary */
+static void smsc911x_tx_update_txcounters(struct net_device *dev)
+{
+	struct smsc911x_data *pdata = netdev_priv(dev);
+	unsigned int tx_stat;
+
+	while ((tx_stat = smsc911x_tx_get_txstatus(pdata)) != 0) {
+		if (unlikely(tx_stat & 0x80000000)) {
+			/* In this driver the packet tag is used as the packet
+			 * length. Since a packet length can never reach the
+			 * size of 0x8000, this bit is reserved. It is worth
+			 * noting that the "reserved bit" in the warning above
+			 * does not reference a hardware defined reserved bit
+			 * but rather a driver defined one.
+			 */
+			SMSC_WARN(pdata, hw, "Packet tag reserved bit is high");
+		} else {
+			if (unlikely(tx_stat & TX_STS_ES_)) {
+				dev->stats.tx_errors++;
+			} else {
+				dev->stats.tx_packets++;
+				dev->stats.tx_bytes += (tx_stat >> 16);
+			}
+			if (unlikely(tx_stat & TX_STS_EXCESS_COL_)) {
+				dev->stats.collisions += 16;
+				dev->stats.tx_aborted_errors += 1;
+			} else {
+				dev->stats.collisions +=
+				    ((tx_stat >> 3) & 0xF);
+			}
+			if (unlikely(tx_stat & TX_STS_LOST_CARRIER_))
+				dev->stats.tx_carrier_errors += 1;
+			if (unlikely(tx_stat & TX_STS_LATE_COL_)) {
+				dev->stats.collisions++;
+				dev->stats.tx_aborted_errors++;
+			}
+		}
+	}
+}
+
+/* Increments the Rx error counters */
+static void
+smsc911x_rx_counterrors(struct net_device *dev, unsigned int rxstat)
+{
+	int crc_err = 0;
+
+	if (unlikely(rxstat & RX_STS_ES_)) {
+		dev->stats.rx_errors++;
+		if (unlikely(rxstat & RX_STS_CRC_ERR_)) {
+			dev->stats.rx_crc_errors++;
+			crc_err = 1;
+		}
+	}
+	if (likely(!crc_err)) {
+		if (unlikely((rxstat & RX_STS_FRAME_TYPE_) &&
+			     (rxstat & RX_STS_LENGTH_ERR_)))
+			dev->stats.rx_length_errors++;
+		if (rxstat & RX_STS_MCAST_)
+			dev->stats.multicast++;
+	}
+}
+
+/* Quickly dumps bad packets */
+static void
+smsc911x_rx_fastforward(struct smsc911x_data *pdata, unsigned int pktwords)
+{
+	if (likely(pktwords >= 4)) {
+		unsigned int timeout = 500;
+		unsigned int val;
+		smsc911x_reg_write(pdata, RX_DP_CTRL, RX_DP_CTRL_RX_FFWD_);
+		do {
+			udelay(1);
+			val = smsc911x_reg_read(pdata, RX_DP_CTRL);
+		} while ((val & RX_DP_CTRL_RX_FFWD_) && --timeout);
+
+		if (unlikely(timeout == 0))
+			SMSC_WARN(pdata, hw, "Timed out waiting for "
+				  "RX FFWD to finish, RX_DP_CTRL: 0x%08X", val);
+	} else {
+		unsigned int temp;
+		while (pktwords--)
+			temp = smsc911x_reg_read(pdata, RX_DATA_FIFO);
+	}
+}
+
+/* NAPI poll function */
+static int smsc911x_poll(struct napi_struct *napi, int budget)
+{
+	struct smsc911x_data *pdata =
+		container_of(napi, struct smsc911x_data, napi);
+	struct net_device *dev = pdata->dev;
+	int npackets = 0;
+
+	while (npackets < budget) {
+		unsigned int pktlength;
+		unsigned int pktwords;
+		struct sk_buff *skb;
+		unsigned int rxstat = smsc911x_rx_get_rxstatus(pdata);
+
+		if (!rxstat) {
+			unsigned int temp;
+			/* We processed all packets available.  Tell NAPI it can
+			 * stop polling then re-enable rx interrupts */
+			smsc911x_reg_write(pdata, INT_STS, INT_STS_RSFL_);
+			napi_complete(napi);
+			temp = smsc911x_reg_read(pdata, INT_EN);
+			temp |= INT_EN_RSFL_EN_;
+			smsc911x_reg_write(pdata, INT_EN, temp);
+			break;
+		}
+
+		/* Count packet for NAPI scheduling, even if it has an error.
+		 * Error packets still require cycles to discard */
+		npackets++;
+
+		pktlength = ((rxstat & 0x3FFF0000) >> 16);
+		pktwords = (pktlength + NET_IP_ALIGN + 3) >> 2;
+		smsc911x_rx_counterrors(dev, rxstat);
+
+		if (unlikely(rxstat & RX_STS_ES_)) {
+			SMSC_WARN(pdata, rx_err,
+				  "Discarding packet with error bit set");
+			/* Packet has an error, discard it and continue with
+			 * the next */
+			smsc911x_rx_fastforward(pdata, pktwords);
+			dev->stats.rx_dropped++;
+			continue;
+		}
+
+		skb = netdev_alloc_skb(dev, pktwords << 2);
+		if (unlikely(!skb)) {
+			SMSC_WARN(pdata, rx_err,
+				  "Unable to allocate skb for rx packet");
+			/* Drop the packet and stop this polling iteration */
+			smsc911x_rx_fastforward(pdata, pktwords);
+			dev->stats.rx_dropped++;
+			break;
+		}
+
+		pdata->ops->rx_readfifo(pdata,
+				 (unsigned int *)skb->data, pktwords);
+
+		/* Align IP on 16B boundary */
+		skb_reserve(skb, NET_IP_ALIGN);
+		skb_put(skb, pktlength - 4);
+		skb->protocol = eth_type_trans(skb, dev);
+		skb_checksum_none_assert(skb);
+		netif_receive_skb(skb);
+
+		/* Update counters */
+		dev->stats.rx_packets++;
+		dev->stats.rx_bytes += (pktlength - 4);
+	}
+
+	/* Return total received packets */
+	return npackets;
+}
+
+/* Returns hash bit number for given MAC address
+ * Example:
+ * 01 00 5E 00 00 01 -> returns bit number 31 */
+static unsigned int smsc911x_hash(char addr[ETH_ALEN])
+{
+	return (ether_crc(ETH_ALEN, addr) >> 26) & 0x3f;
+}
+
+static void smsc911x_rx_multicast_update(struct smsc911x_data *pdata)
+{
+	/* Performs the multicast & mac_cr update.  This is called when
+	 * safe on the current hardware, and with the mac_lock held */
+	unsigned int mac_cr;
+
+	SMSC_ASSERT_MAC_LOCK(pdata);
+
+	mac_cr = smsc911x_mac_read(pdata, MAC_CR);
+	mac_cr |= pdata->set_bits_mask;
+	mac_cr &= ~(pdata->clear_bits_mask);
+	smsc911x_mac_write(pdata, MAC_CR, mac_cr);
+	smsc911x_mac_write(pdata, HASHH, pdata->hashhi);
+	smsc911x_mac_write(pdata, HASHL, pdata->hashlo);
+	SMSC_TRACE(pdata, hw, "maccr 0x%08X, HASHH 0x%08X, HASHL 0x%08X",
+		   mac_cr, pdata->hashhi, pdata->hashlo);
+}
+
+static void smsc911x_rx_multicast_update_workaround(struct smsc911x_data *pdata)
+{
+	unsigned int mac_cr;
+
+	/* This function is only called for older LAN911x devices
+	 * (revA or revB), where MAC_CR, HASHH and HASHL should not
+	 * be modified during Rx - newer devices immediately update the
+	 * registers.
+	 *
+	 * This is called from interrupt context */
+
+	spin_lock(&pdata->mac_lock);
+
+	/* Check Rx has stopped */
+	if (smsc911x_mac_read(pdata, MAC_CR) & MAC_CR_RXEN_)
+		SMSC_WARN(pdata, drv, "Rx not stopped");
+
+	/* Perform the update - safe to do now Rx has stopped */
+	smsc911x_rx_multicast_update(pdata);
+
+	/* Re-enable Rx */
+	mac_cr = smsc911x_mac_read(pdata, MAC_CR);
+	mac_cr |= MAC_CR_RXEN_;
+	smsc911x_mac_write(pdata, MAC_CR, mac_cr);
+
+	pdata->multicast_update_pending = 0;
+
+	spin_unlock(&pdata->mac_lock);
+}
+
+static int smsc911x_phy_general_power_up(struct smsc911x_data *pdata)
+{
+	int rc = 0;
+
+	if (!pdata->phy_dev)
+		return rc;
+
+	/* If the internal PHY is in General Power-Down mode, all, except the
+	 * management interface, is powered-down and stays in that condition as
+	 * long as Phy register bit 0.11 is HIGH.
+	 *
+	 * In that case, clear the bit 0.11, so the PHY powers up and we can
+	 * access to the phy registers.
+	 */
+	rc = phy_read(pdata->phy_dev, MII_BMCR);
+	if (rc < 0) {
+		SMSC_WARN(pdata, drv, "Failed reading PHY control reg");
+		return rc;
+	}
+
+	/* If the PHY general power-down bit is not set is not necessary to
+	 * disable the general power down-mode.
+	 */
+	if (rc & BMCR_PDOWN) {
+		rc = phy_write(pdata->phy_dev, MII_BMCR, rc & ~BMCR_PDOWN);
+		if (rc < 0) {
+			SMSC_WARN(pdata, drv, "Failed writing PHY control reg");
+			return rc;
+		}
+
+		usleep_range(1000, 1500);
+	}
+
+	return 0;
+}
+
+static int smsc911x_phy_disable_energy_detect(struct smsc911x_data *pdata)
+{
+	int rc = 0;
+
+	if (!pdata->phy_dev)
+		return rc;
+
+	rc = phy_read(pdata->phy_dev, MII_LAN83C185_CTRL_STATUS);
+
+	if (rc < 0) {
+		SMSC_WARN(pdata, drv, "Failed reading PHY control reg");
+		return rc;
+	}
+
+	/* Only disable if energy detect mode is already enabled */
+	if (rc & MII_LAN83C185_EDPWRDOWN) {
+		/* Disable energy detect mode for this SMSC Transceivers */
+		rc = phy_write(pdata->phy_dev, MII_LAN83C185_CTRL_STATUS,
+			       rc & (~MII_LAN83C185_EDPWRDOWN));
+
+		if (rc < 0) {
+			SMSC_WARN(pdata, drv, "Failed writing PHY control reg");
+			return rc;
+		}
+		/* Allow PHY to wakeup */
+		mdelay(2);
+	}
+
+	return 0;
+}
+
+static int smsc911x_phy_enable_energy_detect(struct smsc911x_data *pdata)
+{
+	int rc = 0;
+
+	if (!pdata->phy_dev)
+		return rc;
+
+	rc = phy_read(pdata->phy_dev, MII_LAN83C185_CTRL_STATUS);
+
+	if (rc < 0) {
+		SMSC_WARN(pdata, drv, "Failed reading PHY control reg");
+		return rc;
+	}
+
+	/* Only enable if energy detect mode is already disabled */
+	if (!(rc & MII_LAN83C185_EDPWRDOWN)) {
+		/* Enable energy detect mode for this SMSC Transceivers */
+		rc = phy_write(pdata->phy_dev, MII_LAN83C185_CTRL_STATUS,
+			       rc | MII_LAN83C185_EDPWRDOWN);
+
+		if (rc < 0) {
+			SMSC_WARN(pdata, drv, "Failed writing PHY control reg");
+			return rc;
+		}
+	}
+	return 0;
+}
+
+static int smsc911x_soft_reset(struct smsc911x_data *pdata)
+{
+	unsigned int timeout;
+	unsigned int temp;
+	int ret;
+
+	/*
+	 * Make sure to power-up the PHY chip before doing a reset, otherwise
+	 * the reset fails.
+	 */
+	ret = smsc911x_phy_general_power_up(pdata);
+	if (ret) {
+		SMSC_WARN(pdata, drv, "Failed to power-up the PHY chip");
+		return ret;
+	}
+
+	/*
+	 * LAN9210/LAN9211/LAN9220/LAN9221 chips have an internal PHY that
+	 * are initialized in a Energy Detect Power-Down mode that prevents
+	 * the MAC chip to be software reseted. So we have to wakeup the PHY
+	 * before.
+	 */
+	if (pdata->generation == 4) {
+		ret = smsc911x_phy_disable_energy_detect(pdata);
+
+		if (ret) {
+			SMSC_WARN(pdata, drv, "Failed to wakeup the PHY chip");
+			return ret;
+		}
+	}
+
+	/* Reset the LAN911x */
+	smsc911x_reg_write(pdata, HW_CFG, HW_CFG_SRST_);
+	timeout = 10;
+	do {
+		udelay(10);
+		temp = smsc911x_reg_read(pdata, HW_CFG);
+	} while ((--timeout) && (temp & HW_CFG_SRST_));
+
+	if (unlikely(temp & HW_CFG_SRST_)) {
+		SMSC_WARN(pdata, drv, "Failed to complete reset");
+		return -EIO;
+	}
+
+	if (pdata->generation == 4) {
+		ret = smsc911x_phy_enable_energy_detect(pdata);
+
+		if (ret) {
+			SMSC_WARN(pdata, drv, "Failed to wakeup the PHY chip");
+			return ret;
+		}
+	}
+
+	return 0;
+}
+
+/* Sets the device MAC address to dev_addr, called with mac_lock held */
+static void
+smsc911x_set_hw_mac_address(struct smsc911x_data *pdata, u8 dev_addr[6])
+{
+	u32 mac_high16 = (dev_addr[5] << 8) | dev_addr[4];
+	u32 mac_low32 = (dev_addr[3] << 24) | (dev_addr[2] << 16) |
+	    (dev_addr[1] << 8) | dev_addr[0];
+
+	SMSC_ASSERT_MAC_LOCK(pdata);
+
+	smsc911x_mac_write(pdata, ADDRH, mac_high16);
+	smsc911x_mac_write(pdata, ADDRL, mac_low32);
+}
+
+static void smsc911x_disable_irq_chip(struct net_device *dev)
+{
+	struct smsc911x_data *pdata = netdev_priv(dev);
+
+	smsc911x_reg_write(pdata, INT_EN, 0);
+	smsc911x_reg_write(pdata, INT_STS, 0xFFFFFFFF);
+}
+
+static int smsc911x_open(struct net_device *dev)
+{
+	struct smsc911x_data *pdata = netdev_priv(dev);
+	unsigned int timeout;
+	unsigned int temp;
+	unsigned int intcfg;
+
+	/* if the phy is not yet registered, retry later*/
+	if (!pdata->phy_dev) {
+		SMSC_WARN(pdata, hw, "phy_dev is NULL");
+		return -EAGAIN;
+	}
+
+	/* Reset the LAN911x */
+	if (smsc911x_soft_reset(pdata)) {
+		SMSC_WARN(pdata, hw, "soft reset failed");
+		return -EIO;
+	}
+
+	smsc911x_reg_write(pdata, HW_CFG, 0x00050000);
+	smsc911x_reg_write(pdata, AFC_CFG, 0x006E3740);
+
+	/* Increase the legal frame size of VLAN tagged frames to 1522 bytes */
+	spin_lock_irq(&pdata->mac_lock);
+	smsc911x_mac_write(pdata, VLAN1, ETH_P_8021Q);
+	spin_unlock_irq(&pdata->mac_lock);
+
+	/* Make sure EEPROM has finished loading before setting GPIO_CFG */
+	timeout = 50;
+	while ((smsc911x_reg_read(pdata, E2P_CMD) & E2P_CMD_EPC_BUSY_) &&
+	       --timeout) {
+		udelay(10);
+	}
+
+	if (unlikely(timeout == 0))
+		SMSC_WARN(pdata, ifup,
+			  "Timed out waiting for EEPROM busy bit to clear");
+
+	smsc911x_reg_write(pdata, GPIO_CFG, 0x70070000);
+
+	/* The soft reset above cleared the device's MAC address,
+	 * restore it from local copy (set in probe) */
+	spin_lock_irq(&pdata->mac_lock);
+	smsc911x_set_hw_mac_address(pdata, dev->dev_addr);
+	spin_unlock_irq(&pdata->mac_lock);
+
+	/* Initialise irqs, but leave all sources disabled */
+	smsc911x_disable_irq_chip(dev);
+
+	/* Set interrupt deassertion to 100uS */
+	intcfg = ((10 << 24) | INT_CFG_IRQ_EN_);
+
+	if (pdata->config.irq_polarity) {
+		SMSC_TRACE(pdata, ifup, "irq polarity: active high");
+		intcfg |= INT_CFG_IRQ_POL_;
+	} else {
+		SMSC_TRACE(pdata, ifup, "irq polarity: active low");
+	}
+
+	if (pdata->config.irq_type) {
+		SMSC_TRACE(pdata, ifup, "irq type: push-pull");
+		intcfg |= INT_CFG_IRQ_TYPE_;
+	} else {
+		SMSC_TRACE(pdata, ifup, "irq type: open drain");
+	}
+
+	smsc911x_reg_write(pdata, INT_CFG, intcfg);
+
+	SMSC_TRACE(pdata, ifup, "Testing irq handler using IRQ %d", dev->irq);
+	pdata->software_irq_signal = 0;
+	smp_wmb();
+
+	temp = smsc911x_reg_read(pdata, INT_EN);
+	temp |= INT_EN_SW_INT_EN_;
+	smsc911x_reg_write(pdata, INT_EN, temp);
+
+	timeout = 1000;
+	while (timeout--) {
+		if (pdata->software_irq_signal)
+			break;
+		msleep(1);
+	}
+
+	if (!pdata->software_irq_signal) {
+		netdev_warn(dev, "ISR failed signaling test (IRQ %d)\n",
+			    dev->irq);
+		return -ENODEV;
+	}
+	SMSC_TRACE(pdata, ifup, "IRQ handler passed test using IRQ %d",
+		   dev->irq);
+
+	netdev_info(dev, "SMSC911x/921x identified at %#08lx, IRQ: %d\n",
+		    (unsigned long)pdata->ioaddr, dev->irq);
+
+	/* Reset the last known duplex and carrier */
+	pdata->last_duplex = -1;
+	pdata->last_carrier = -1;
+
+	/* Bring the PHY up */
+	phy_start(pdata->phy_dev);
+
+	temp = smsc911x_reg_read(pdata, HW_CFG);
+	/* Preserve TX FIFO size and external PHY configuration */
+	temp &= (HW_CFG_TX_FIF_SZ_|0x00000FFF);
+	temp |= HW_CFG_SF_;
+	smsc911x_reg_write(pdata, HW_CFG, temp);
+
+	temp = smsc911x_reg_read(pdata, FIFO_INT);
+	temp |= FIFO_INT_TX_AVAIL_LEVEL_;
+	temp &= ~(FIFO_INT_RX_STS_LEVEL_);
+	smsc911x_reg_write(pdata, FIFO_INT, temp);
+
+	/* set RX Data offset to 2 bytes for alignment */
+	smsc911x_reg_write(pdata, RX_CFG, (NET_IP_ALIGN << 8));
+
+	/* enable NAPI polling before enabling RX interrupts */
+	napi_enable(&pdata->napi);
+
+	temp = smsc911x_reg_read(pdata, INT_EN);
+	temp |= (INT_EN_TDFA_EN_ | INT_EN_RSFL_EN_ | INT_EN_RXSTOP_INT_EN_);
+	smsc911x_reg_write(pdata, INT_EN, temp);
+
+	spin_lock_irq(&pdata->mac_lock);
+	temp = smsc911x_mac_read(pdata, MAC_CR);
+	temp |= (MAC_CR_TXEN_ | MAC_CR_RXEN_ | MAC_CR_HBDIS_);
+	smsc911x_mac_write(pdata, MAC_CR, temp);
+	spin_unlock_irq(&pdata->mac_lock);
+
+	smsc911x_reg_write(pdata, TX_CFG, TX_CFG_TX_ON_);
+
+	netif_start_queue(dev);
+	return 0;
+}
+
+/* Entry point for stopping the interface */
+static int smsc911x_stop(struct net_device *dev)
+{
+	struct smsc911x_data *pdata = netdev_priv(dev);
+	unsigned int temp;
+
+	/* Disable all device interrupts */
+	temp = smsc911x_reg_read(pdata, INT_CFG);
+	temp &= ~INT_CFG_IRQ_EN_;
+	smsc911x_reg_write(pdata, INT_CFG, temp);
+
+	/* Stop Tx and Rx polling */
+	netif_stop_queue(dev);
+	napi_disable(&pdata->napi);
+
+	/* At this point all Rx and Tx activity is stopped */
+	dev->stats.rx_dropped += smsc911x_reg_read(pdata, RX_DROP);
+	smsc911x_tx_update_txcounters(dev);
+
+	/* Bring the PHY down */
+	if (pdata->phy_dev)
+		phy_stop(pdata->phy_dev);
+
+	SMSC_TRACE(pdata, ifdown, "Interface stopped");
+	return 0;
+}
+
+/* Entry point for transmitting a packet */
+static int smsc911x_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+	struct smsc911x_data *pdata = netdev_priv(dev);
+	unsigned int freespace;
+	unsigned int tx_cmd_a;
+	unsigned int tx_cmd_b;
+	unsigned int temp;
+	u32 wrsz;
+	ulong bufp;
+
+	freespace = smsc911x_reg_read(pdata, TX_FIFO_INF) & TX_FIFO_INF_TDFREE_;
+
+	if (unlikely(freespace < TX_FIFO_LOW_THRESHOLD))
+		SMSC_WARN(pdata, tx_err,
+			  "Tx data fifo low, space available: %d", freespace);
+
+	/* Word alignment adjustment */
+	tx_cmd_a = (u32)((ulong)skb->data & 0x03) << 16;
+	tx_cmd_a |= TX_CMD_A_FIRST_SEG_ | TX_CMD_A_LAST_SEG_;
+	tx_cmd_a |= (unsigned int)skb->len;
+
+	tx_cmd_b = ((unsigned int)skb->len) << 16;
+	tx_cmd_b |= (unsigned int)skb->len;
+
+	smsc911x_reg_write(pdata, TX_DATA_FIFO, tx_cmd_a);
+	smsc911x_reg_write(pdata, TX_DATA_FIFO, tx_cmd_b);
+
+	bufp = (ulong)skb->data & (~0x3);
+	wrsz = (u32)skb->len + 3;
+	wrsz += (u32)((ulong)skb->data & 0x3);
+	wrsz >>= 2;
+
+	pdata->ops->tx_writefifo(pdata, (unsigned int *)bufp, wrsz);
+	freespace -= (skb->len + 32);
+	skb_tx_timestamp(skb);
+	dev_consume_skb_any(skb);
+
+	if (unlikely(smsc911x_tx_get_txstatcount(pdata) >= 30))
+		smsc911x_tx_update_txcounters(dev);
+
+	if (freespace < TX_FIFO_LOW_THRESHOLD) {
+		netif_stop_queue(dev);
+		temp = smsc911x_reg_read(pdata, FIFO_INT);
+		temp &= 0x00FFFFFF;
+		temp |= 0x32000000;
+		smsc911x_reg_write(pdata, FIFO_INT, temp);
+	}
+
+	return NETDEV_TX_OK;
+}
+
+/* Entry point for getting status counters */
+static struct net_device_stats *smsc911x_get_stats(struct net_device *dev)
+{
+	struct smsc911x_data *pdata = netdev_priv(dev);
+	smsc911x_tx_update_txcounters(dev);
+	dev->stats.rx_dropped += smsc911x_reg_read(pdata, RX_DROP);
+	return &dev->stats;
+}
+
+/* Entry point for setting addressing modes */
+static void smsc911x_set_multicast_list(struct net_device *dev)
+{
+	struct smsc911x_data *pdata = netdev_priv(dev);
+	unsigned long flags;
+
+	if (dev->flags & IFF_PROMISC) {
+		/* Enabling promiscuous mode */
+		pdata->set_bits_mask = MAC_CR_PRMS_;
+		pdata->clear_bits_mask = (MAC_CR_MCPAS_ | MAC_CR_HPFILT_);
+		pdata->hashhi = 0;
+		pdata->hashlo = 0;
+	} else if (dev->flags & IFF_ALLMULTI) {
+		/* Enabling all multicast mode */
+		pdata->set_bits_mask = MAC_CR_MCPAS_;
+		pdata->clear_bits_mask = (MAC_CR_PRMS_ | MAC_CR_HPFILT_);
+		pdata->hashhi = 0;
+		pdata->hashlo = 0;
+	} else if (!netdev_mc_empty(dev)) {
+		/* Enabling specific multicast addresses */
+		unsigned int hash_high = 0;
+		unsigned int hash_low = 0;
+		struct netdev_hw_addr *ha;
+
+		pdata->set_bits_mask = MAC_CR_HPFILT_;
+		pdata->clear_bits_mask = (MAC_CR_PRMS_ | MAC_CR_MCPAS_);
+
+		netdev_for_each_mc_addr(ha, dev) {
+			unsigned int bitnum = smsc911x_hash(ha->addr);
+			unsigned int mask = 0x01 << (bitnum & 0x1F);
+
+			if (bitnum & 0x20)
+				hash_high |= mask;
+			else
+				hash_low |= mask;
+		}
+
+		pdata->hashhi = hash_high;
+		pdata->hashlo = hash_low;
+	} else {
+		/* Enabling local MAC address only */
+		pdata->set_bits_mask = 0;
+		pdata->clear_bits_mask =
+		    (MAC_CR_PRMS_ | MAC_CR_MCPAS_ | MAC_CR_HPFILT_);
+		pdata->hashhi = 0;
+		pdata->hashlo = 0;
+	}
+
+	spin_lock_irqsave(&pdata->mac_lock, flags);
+
+	if (pdata->generation <= 1) {
+		/* Older hardware revision - cannot change these flags while
+		 * receiving data */
+		if (!pdata->multicast_update_pending) {
+			unsigned int temp;
+			SMSC_TRACE(pdata, hw, "scheduling mcast update");
+			pdata->multicast_update_pending = 1;
+
+			/* Request the hardware to stop, then perform the
+			 * update when we get an RX_STOP interrupt */
+			temp = smsc911x_mac_read(pdata, MAC_CR);
+			temp &= ~(MAC_CR_RXEN_);
+			smsc911x_mac_write(pdata, MAC_CR, temp);
+		} else {
+			/* There is another update pending, this should now
+			 * use the newer values */
+		}
+	} else {
+		/* Newer hardware revision - can write immediately */
+		smsc911x_rx_multicast_update(pdata);
+	}
+
+	spin_unlock_irqrestore(&pdata->mac_lock, flags);
+}
+
+static irqreturn_t smsc911x_irqhandler(int irq, void *dev_id)
+{
+	struct net_device *dev = dev_id;
+	struct smsc911x_data *pdata = netdev_priv(dev);
+	u32 intsts = smsc911x_reg_read(pdata, INT_STS);
+	u32 inten = smsc911x_reg_read(pdata, INT_EN);
+	int serviced = IRQ_NONE;
+	u32 temp;
+
+	if (unlikely(intsts & inten & INT_STS_SW_INT_)) {
+		temp = smsc911x_reg_read(pdata, INT_EN);
+		temp &= (~INT_EN_SW_INT_EN_);
+		smsc911x_reg_write(pdata, INT_EN, temp);
+		smsc911x_reg_write(pdata, INT_STS, INT_STS_SW_INT_);
+		pdata->software_irq_signal = 1;
+		smp_wmb();
+		serviced = IRQ_HANDLED;
+	}
+
+	if (unlikely(intsts & inten & INT_STS_RXSTOP_INT_)) {
+		/* Called when there is a multicast update scheduled and
+		 * it is now safe to complete the update */
+		SMSC_TRACE(pdata, intr, "RX Stop interrupt");
+		smsc911x_reg_write(pdata, INT_STS, INT_STS_RXSTOP_INT_);
+		if (pdata->multicast_update_pending)
+			smsc911x_rx_multicast_update_workaround(pdata);
+		serviced = IRQ_HANDLED;
+	}
+
+	if (intsts & inten & INT_STS_TDFA_) {
+		temp = smsc911x_reg_read(pdata, FIFO_INT);
+		temp |= FIFO_INT_TX_AVAIL_LEVEL_;
+		smsc911x_reg_write(pdata, FIFO_INT, temp);
+		smsc911x_reg_write(pdata, INT_STS, INT_STS_TDFA_);
+		netif_wake_queue(dev);
+		serviced = IRQ_HANDLED;
+	}
+
+	if (unlikely(intsts & inten & INT_STS_RXE_)) {
+		SMSC_TRACE(pdata, intr, "RX Error interrupt");
+		smsc911x_reg_write(pdata, INT_STS, INT_STS_RXE_);
+		serviced = IRQ_HANDLED;
+	}
+
+	if (likely(intsts & inten & INT_STS_RSFL_)) {
+		if (likely(napi_schedule_prep(&pdata->napi))) {
+			/* Disable Rx interrupts */
+			temp = smsc911x_reg_read(pdata, INT_EN);
+			temp &= (~INT_EN_RSFL_EN_);
+			smsc911x_reg_write(pdata, INT_EN, temp);
+			/* Schedule a NAPI poll */
+			__napi_schedule(&pdata->napi);
+		} else {
+			SMSC_WARN(pdata, rx_err, "napi_schedule_prep failed");
+		}
+		serviced = IRQ_HANDLED;
+	}
+
+	return serviced;
+}
+
+#ifdef CONFIG_NET_POLL_CONTROLLER
+static void smsc911x_poll_controller(struct net_device *dev)
+{
+	disable_irq(dev->irq);
+	smsc911x_irqhandler(0, dev);
+	enable_irq(dev->irq);
+}
+#endif				/* CONFIG_NET_POLL_CONTROLLER */
+
+static int smsc911x_set_mac_address(struct net_device *dev, void *p)
+{
+	struct smsc911x_data *pdata = netdev_priv(dev);
+	struct sockaddr *addr = p;
+
+	/* On older hardware revisions we cannot change the mac address
+	 * registers while receiving data.  Newer devices can safely change
+	 * this at any time. */
+	if (pdata->generation <= 1 && netif_running(dev))
+		return -EBUSY;
+
+	if (!is_valid_ether_addr(addr->sa_data))
+		return -EADDRNOTAVAIL;
+
+	memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
+
+	spin_lock_irq(&pdata->mac_lock);
+	smsc911x_set_hw_mac_address(pdata, dev->dev_addr);
+	spin_unlock_irq(&pdata->mac_lock);
+
+	netdev_info(dev, "MAC Address: %pM\n", dev->dev_addr);
+
+	return 0;
+}
+
+/* Standard ioctls for mii-tool */
+static int smsc911x_do_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
+{
+	struct smsc911x_data *pdata = netdev_priv(dev);
+
+	if (!netif_running(dev) || !pdata->phy_dev)
+		return -EINVAL;
+
+	return phy_mii_ioctl(pdata->phy_dev, ifr, cmd);
+}
+
+static int
+smsc911x_ethtool_getsettings(struct net_device *dev, struct ethtool_cmd *cmd)
+{
+	struct smsc911x_data *pdata = netdev_priv(dev);
+
+	cmd->maxtxpkt = 1;
+	cmd->maxrxpkt = 1;
+	return phy_ethtool_gset(pdata->phy_dev, cmd);
+}
+
+static int
+smsc911x_ethtool_setsettings(struct net_device *dev, struct ethtool_cmd *cmd)
+{
+	struct smsc911x_data *pdata = netdev_priv(dev);
+
+	return phy_ethtool_sset(pdata->phy_dev, cmd);
+}
+
+static void smsc911x_ethtool_getdrvinfo(struct net_device *dev,
+					struct ethtool_drvinfo *info)
+{
+	strlcpy(info->driver, SMSC_CHIPNAME, sizeof(info->driver));
+	strlcpy(info->version, SMSC_DRV_VERSION, sizeof(info->version));
+	strlcpy(info->bus_info, dev_name(dev->dev.parent),
+		sizeof(info->bus_info));
+}
+
+static int smsc911x_ethtool_nwayreset(struct net_device *dev)
+{
+	struct smsc911x_data *pdata = netdev_priv(dev);
+
+	return phy_start_aneg(pdata->phy_dev);
+}
+
+static u32 smsc911x_ethtool_getmsglevel(struct net_device *dev)
+{
+	struct smsc911x_data *pdata = netdev_priv(dev);
+	return pdata->msg_enable;
+}
+
+static void smsc911x_ethtool_setmsglevel(struct net_device *dev, u32 level)
+{
+	struct smsc911x_data *pdata = netdev_priv(dev);
+	pdata->msg_enable = level;
+}
+
+static int smsc911x_ethtool_getregslen(struct net_device *dev)
+{
+	return (((E2P_DATA - ID_REV) / 4 + 1) + (WUCSR - MAC_CR) + 1 + 32) *
+	    sizeof(u32);
+}
+
+static void
+smsc911x_ethtool_getregs(struct net_device *dev, struct ethtool_regs *regs,
+			 void *buf)
+{
+	struct smsc911x_data *pdata = netdev_priv(dev);
+	struct phy_device *phy_dev = pdata->phy_dev;
+	unsigned long flags;
+	unsigned int i;
+	unsigned int j = 0;
+	u32 *data = buf;
+
+	regs->version = pdata->idrev;
+	for (i = ID_REV; i <= E2P_DATA; i += (sizeof(u32)))
+		data[j++] = smsc911x_reg_read(pdata, i);
+
+	for (i = MAC_CR; i <= WUCSR; i++) {
+		spin_lock_irqsave(&pdata->mac_lock, flags);
+		data[j++] = smsc911x_mac_read(pdata, i);
+		spin_unlock_irqrestore(&pdata->mac_lock, flags);
+	}
+
+	for (i = 0; i <= 31; i++)
+		data[j++] = smsc911x_mii_read(phy_dev->bus, phy_dev->addr, i);
+}
+
+static void smsc911x_eeprom_enable_access(struct smsc911x_data *pdata)
+{
+	unsigned int temp = smsc911x_reg_read(pdata, GPIO_CFG);
+	temp &= ~GPIO_CFG_EEPR_EN_;
+	smsc911x_reg_write(pdata, GPIO_CFG, temp);
+	msleep(1);
+}
+
+static int smsc911x_eeprom_send_cmd(struct smsc911x_data *pdata, u32 op)
+{
+	int timeout = 100;
+	u32 e2cmd;
+
+	SMSC_TRACE(pdata, drv, "op 0x%08x", op);
+	if (smsc911x_reg_read(pdata, E2P_CMD) & E2P_CMD_EPC_BUSY_) {
+		SMSC_WARN(pdata, drv, "Busy at start");
+		return -EBUSY;
+	}
+
+	e2cmd = op | E2P_CMD_EPC_BUSY_;
+	smsc911x_reg_write(pdata, E2P_CMD, e2cmd);
+
+	do {
+		msleep(1);
+		e2cmd = smsc911x_reg_read(pdata, E2P_CMD);
+	} while ((e2cmd & E2P_CMD_EPC_BUSY_) && (--timeout));
+
+	if (!timeout) {
+		SMSC_TRACE(pdata, drv, "TIMED OUT");
+		return -EAGAIN;
+	}
+
+	if (e2cmd & E2P_CMD_EPC_TIMEOUT_) {
+		SMSC_TRACE(pdata, drv, "Error occurred during eeprom operation");
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int smsc911x_eeprom_read_location(struct smsc911x_data *pdata,
+					 u8 address, u8 *data)
+{
+	u32 op = E2P_CMD_EPC_CMD_READ_ | address;
+	int ret;
+
+	SMSC_TRACE(pdata, drv, "address 0x%x", address);
+	ret = smsc911x_eeprom_send_cmd(pdata, op);
+
+	if (!ret)
+		data[address] = smsc911x_reg_read(pdata, E2P_DATA);
+
+	return ret;
+}
+
+static int smsc911x_eeprom_write_location(struct smsc911x_data *pdata,
+					  u8 address, u8 data)
+{
+	u32 op = E2P_CMD_EPC_CMD_ERASE_ | address;
+	u32 temp;
+	int ret;
+
+	SMSC_TRACE(pdata, drv, "address 0x%x, data 0x%x", address, data);
+	ret = smsc911x_eeprom_send_cmd(pdata, op);
+
+	if (!ret) {
+		op = E2P_CMD_EPC_CMD_WRITE_ | address;
+		smsc911x_reg_write(pdata, E2P_DATA, (u32)data);
+
+		/* Workaround for hardware read-after-write restriction */
+		temp = smsc911x_reg_read(pdata, BYTE_TEST);
+
+		ret = smsc911x_eeprom_send_cmd(pdata, op);
+	}
+
+	return ret;
+}
+
+static int smsc911x_ethtool_get_eeprom_len(struct net_device *dev)
+{
+	return SMSC911X_EEPROM_SIZE;
+}
+
+static int smsc911x_ethtool_get_eeprom(struct net_device *dev,
+				       struct ethtool_eeprom *eeprom, u8 *data)
+{
+	struct smsc911x_data *pdata = netdev_priv(dev);
+	u8 eeprom_data[SMSC911X_EEPROM_SIZE];
+	int len;
+	int i;
+
+	smsc911x_eeprom_enable_access(pdata);
+
+	len = min(eeprom->len, SMSC911X_EEPROM_SIZE);
+	for (i = 0; i < len; i++) {
+		int ret = smsc911x_eeprom_read_location(pdata, i, eeprom_data);
+		if (ret < 0) {
+			eeprom->len = 0;
+			return ret;
+		}
+	}
+
+	memcpy(data, &eeprom_data[eeprom->offset], len);
+	eeprom->len = len;
+	return 0;
+}
+
+static int smsc911x_ethtool_set_eeprom(struct net_device *dev,
+				       struct ethtool_eeprom *eeprom, u8 *data)
+{
+	int ret;
+	struct smsc911x_data *pdata = netdev_priv(dev);
+
+	smsc911x_eeprom_enable_access(pdata);
+	smsc911x_eeprom_send_cmd(pdata, E2P_CMD_EPC_CMD_EWEN_);
+	ret = smsc911x_eeprom_write_location(pdata, eeprom->offset, *data);
+	smsc911x_eeprom_send_cmd(pdata, E2P_CMD_EPC_CMD_EWDS_);
+
+	/* Single byte write, according to man page */
+	eeprom->len = 1;
+
+	return ret;
+}
+
+static const struct ethtool_ops smsc911x_ethtool_ops = {
+	.get_settings = smsc911x_ethtool_getsettings,
+	.set_settings = smsc911x_ethtool_setsettings,
+	.get_link = ethtool_op_get_link,
+	.get_drvinfo = smsc911x_ethtool_getdrvinfo,
+	.nway_reset = smsc911x_ethtool_nwayreset,
+	.get_msglevel = smsc911x_ethtool_getmsglevel,
+	.set_msglevel = smsc911x_ethtool_setmsglevel,
+	.get_regs_len = smsc911x_ethtool_getregslen,
+	.get_regs = smsc911x_ethtool_getregs,
+	.get_eeprom_len = smsc911x_ethtool_get_eeprom_len,
+	.get_eeprom = smsc911x_ethtool_get_eeprom,
+	.set_eeprom = smsc911x_ethtool_set_eeprom,
+	.get_ts_info = ethtool_op_get_ts_info,
+};
+
+static const struct net_device_ops smsc911x_netdev_ops = {
+	.ndo_open		= smsc911x_open,
+	.ndo_stop		= smsc911x_stop,
+	.ndo_start_xmit		= smsc911x_hard_start_xmit,
+	.ndo_get_stats		= smsc911x_get_stats,
+	.ndo_set_rx_mode	= smsc911x_set_multicast_list,
+	.ndo_do_ioctl		= smsc911x_do_ioctl,
+	.ndo_change_mtu		= eth_change_mtu,
+	.ndo_validate_addr	= eth_validate_addr,
+	.ndo_set_mac_address 	= smsc911x_set_mac_address,
+#ifdef CONFIG_NET_POLL_CONTROLLER
+	.ndo_poll_controller	= smsc911x_poll_controller,
+#endif
+};
+
+/* copies the current mac address from hardware to dev->dev_addr */
+static void smsc911x_read_mac_address(struct net_device *dev)
+{
+	struct smsc911x_data *pdata = netdev_priv(dev);
+	u32 mac_high16 = smsc911x_mac_read(pdata, ADDRH);
+	u32 mac_low32 = smsc911x_mac_read(pdata, ADDRL);
+
+	dev->dev_addr[0] = (u8)(mac_low32);
+	dev->dev_addr[1] = (u8)(mac_low32 >> 8);
+	dev->dev_addr[2] = (u8)(mac_low32 >> 16);
+	dev->dev_addr[3] = (u8)(mac_low32 >> 24);
+	dev->dev_addr[4] = (u8)(mac_high16);
+	dev->dev_addr[5] = (u8)(mac_high16 >> 8);
+}
+
+/* Initializing private device structures, only called from probe */
+static int smsc911x_init(struct net_device *dev)
+{
+	struct smsc911x_data *pdata = netdev_priv(dev);
+	unsigned int byte_test, mask;
+	unsigned int to = 100;
+
+	SMSC_TRACE(pdata, probe, "Driver Parameters:");
+	SMSC_TRACE(pdata, probe, "LAN base: 0x%08lX",
+		   (unsigned long)pdata->ioaddr);
+	SMSC_TRACE(pdata, probe, "IRQ: %d", dev->irq);
+	SMSC_TRACE(pdata, probe, "PHY will be autodetected.");
+
+	spin_lock_init(&pdata->dev_lock);
+	spin_lock_init(&pdata->mac_lock);
+
+	if (pdata->ioaddr == NULL) {
+		SMSC_WARN(pdata, probe, "pdata->ioaddr: 0x00000000");
+		return -ENODEV;
+	}
+
+	/*
+	 * poll the READY bit in PMT_CTRL. Any other access to the device is
+	 * forbidden while this bit isn't set. Try for 100ms
+	 *
+	 * Note that this test is done before the WORD_SWAP register is
+	 * programmed. So in some configurations the READY bit is at 16 before
+	 * WORD_SWAP is written to. This issue is worked around by waiting
+	 * until either bit 0 or bit 16 gets set in PMT_CTRL.
+	 *
+	 * SMSC has confirmed that checking bit 16 (marked as reserved in
+	 * the datasheet) is fine since these bits "will either never be set
+	 * or can only go high after READY does (so also indicate the device
+	 * is ready)".
+	 */
+
+	mask = PMT_CTRL_READY_ | swahw32(PMT_CTRL_READY_);
+	while (!(smsc911x_reg_read(pdata, PMT_CTRL) & mask) && --to)
+		udelay(1000);
+
+	if (to == 0) {
+		netdev_err(dev, "Device not READY in 100ms aborting\n");
+		return -ENODEV;
+	}
+
+	/* Check byte ordering */
+	byte_test = smsc911x_reg_read(pdata, BYTE_TEST);
+	SMSC_TRACE(pdata, probe, "BYTE_TEST: 0x%08X", byte_test);
+	if (byte_test == 0x43218765) {
+		SMSC_TRACE(pdata, probe, "BYTE_TEST looks swapped, "
+			   "applying WORD_SWAP");
+		smsc911x_reg_write(pdata, WORD_SWAP, 0xffffffff);
+
+		/* 1 dummy read of BYTE_TEST is needed after a write to
+		 * WORD_SWAP before its contents are valid */
+		byte_test = smsc911x_reg_read(pdata, BYTE_TEST);
+
+		byte_test = smsc911x_reg_read(pdata, BYTE_TEST);
+	}
+
+	if (byte_test != 0x87654321) {
+		SMSC_WARN(pdata, drv, "BYTE_TEST: 0x%08X", byte_test);
+		if (((byte_test >> 16) & 0xFFFF) == (byte_test & 0xFFFF)) {
+			SMSC_WARN(pdata, probe,
+				  "top 16 bits equal to bottom 16 bits");
+			SMSC_TRACE(pdata, probe,
+				   "This may mean the chip is set "
+				   "for 32 bit while the bus is reading 16 bit");
+		}
+		return -ENODEV;
+	}
+
+	/* Default generation to zero (all workarounds apply) */
+	pdata->generation = 0;
+
+	pdata->idrev = smsc911x_reg_read(pdata, ID_REV);
+	switch (pdata->idrev & 0xFFFF0000) {
+	case 0x01180000:
+	case 0x01170000:
+	case 0x01160000:
+	case 0x01150000:
+	case 0x218A0000:
+		/* LAN911[5678] family */
+		pdata->generation = pdata->idrev & 0x0000FFFF;
+		break;
+
+	case 0x118A0000:
+	case 0x117A0000:
+	case 0x116A0000:
+	case 0x115A0000:
+		/* LAN921[5678] family */
+		pdata->generation = 3;
+		break;
+
+	case 0x92100000:
+	case 0x92110000:
+	case 0x92200000:
+	case 0x92210000:
+		/* LAN9210/LAN9211/LAN9220/LAN9221 */
+		pdata->generation = 4;
+		break;
+
+	default:
+		SMSC_WARN(pdata, probe, "LAN911x not identified, idrev: 0x%08X",
+			  pdata->idrev);
+		return -ENODEV;
+	}
+
+	SMSC_TRACE(pdata, probe,
+		   "LAN911x identified, idrev: 0x%08X, generation: %d",
+		   pdata->idrev, pdata->generation);
+
+	if (pdata->generation == 0)
+		SMSC_WARN(pdata, probe,
+			  "This driver is not intended for this chip revision");
+
+	/* workaround for platforms without an eeprom, where the mac address
+	 * is stored elsewhere and set by the bootloader.  This saves the
+	 * mac address before resetting the device */
+	if (pdata->config.flags & SMSC911X_SAVE_MAC_ADDRESS) {
+		spin_lock_irq(&pdata->mac_lock);
+		smsc911x_read_mac_address(dev);
+		spin_unlock_irq(&pdata->mac_lock);
+	}
+
+	/* Reset the LAN911x */
+	if (smsc911x_soft_reset(pdata))
+		return -ENODEV;
+
+	dev->flags |= IFF_MULTICAST;
+	netif_napi_add(dev, &pdata->napi, smsc911x_poll, SMSC_NAPI_WEIGHT);
+	dev->netdev_ops = &smsc911x_netdev_ops;
+	dev->ethtool_ops = &smsc911x_ethtool_ops;
+
+	return 0;
+}
+
+static int smsc911x_drv_remove(struct platform_device *pdev)
+{
+	struct net_device *dev;
+	struct smsc911x_data *pdata;
+	struct resource *res;
+
+	dev = platform_get_drvdata(pdev);
+	BUG_ON(!dev);
+	pdata = netdev_priv(dev);
+	BUG_ON(!pdata);
+	BUG_ON(!pdata->ioaddr);
+	BUG_ON(!pdata->phy_dev);
+
+	SMSC_TRACE(pdata, ifdown, "Stopping driver");
+
+	phy_disconnect(pdata->phy_dev);
+	pdata->phy_dev = NULL;
+	mdiobus_unregister(pdata->mii_bus);
+	mdiobus_free(pdata->mii_bus);
+
+	unregister_netdev(dev);
+	free_irq(dev->irq, dev);
+	res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
+					   "smsc911x-memory");
+	if (!res)
+		res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+
+	release_mem_region(res->start, resource_size(res));
+
+	iounmap(pdata->ioaddr);
+
+	(void)smsc911x_disable_resources(pdev);
+	smsc911x_free_resources(pdev);
+
+	free_netdev(dev);
+
+	pm_runtime_put(&pdev->dev);
+	pm_runtime_disable(&pdev->dev);
+
+	return 0;
+}
+
+/* standard register acces */
+static const struct smsc911x_ops standard_smsc911x_ops = {
+	.reg_read = __smsc911x_reg_read,
+	.reg_write = __smsc911x_reg_write,
+	.rx_readfifo = smsc911x_rx_readfifo,
+	.tx_writefifo = smsc911x_tx_writefifo,
+};
+
+/* shifted register access */
+static const struct smsc911x_ops shifted_smsc911x_ops = {
+	.reg_read = __smsc911x_reg_read_shift,
+	.reg_write = __smsc911x_reg_write_shift,
+	.rx_readfifo = smsc911x_rx_readfifo_shift,
+	.tx_writefifo = smsc911x_tx_writefifo_shift,
+};
+
+#ifdef CONFIG_OF
+static int smsc911x_probe_config_dt(struct smsc911x_platform_config *config,
+				    struct device_node *np)
+{
+	const char *mac;
+	u32 width = 0;
+
+	if (!np)
+		return -ENODEV;
+
+	config->phy_interface = of_get_phy_mode(np);
+
+	mac = of_get_mac_address(np);
+	if (mac)
+		memcpy(config->mac, mac, ETH_ALEN);
+
+	of_property_read_u32(np, "reg-shift", &config->shift);
+
+	of_property_read_u32(np, "reg-io-width", &width);
+	if (width == 4)
+		config->flags |= SMSC911X_USE_32BIT;
+	else
+		config->flags |= SMSC911X_USE_16BIT;
+
+	if (of_get_property(np, "smsc,irq-active-high", NULL))
+		config->irq_polarity = SMSC911X_IRQ_POLARITY_ACTIVE_HIGH;
+
+	if (of_get_property(np, "smsc,irq-push-pull", NULL))
+		config->irq_type = SMSC911X_IRQ_TYPE_PUSH_PULL;
+
+	if (of_get_property(np, "smsc,force-internal-phy", NULL))
+		config->flags |= SMSC911X_FORCE_INTERNAL_PHY;
+
+	if (of_get_property(np, "smsc,force-external-phy", NULL))
+		config->flags |= SMSC911X_FORCE_EXTERNAL_PHY;
+
+	if (of_get_property(np, "smsc,save-mac-address", NULL))
+		config->flags |= SMSC911X_SAVE_MAC_ADDRESS;
+
+	return 0;
+}
+#else
+static inline int smsc911x_probe_config_dt(
+				struct smsc911x_platform_config *config,
+				struct device_node *np)
+{
+	return -ENODEV;
+}
+#endif /* CONFIG_OF */
+
+static int smsc911x_drv_probe(struct platform_device *pdev)
+{
+	struct device_node *np = pdev->dev.of_node;
+	struct net_device *dev;
+	struct smsc911x_data *pdata;
+	struct smsc911x_platform_config *config = dev_get_platdata(&pdev->dev);
+	struct resource *res;
+	unsigned int intcfg = 0;
+	int res_size, irq, irq_flags;
+	int retval;
+
+	res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
+					   "smsc911x-memory");
+	if (!res)
+		res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (!res) {
+		pr_warn("Could not allocate resource\n");
+		retval = -ENODEV;
+		goto out_0;
+	}
+	res_size = resource_size(res);
+
+	irq = platform_get_irq(pdev, 0);
+	if (irq <= 0) {
+		pr_warn("Could not allocate irq resource\n");
+		retval = -ENODEV;
+		goto out_0;
+	}
+
+	if (!request_mem_region(res->start, res_size, SMSC_CHIPNAME)) {
+		retval = -EBUSY;
+		goto out_0;
+	}
+
+	dev = alloc_etherdev(sizeof(struct smsc911x_data));
+	if (!dev) {
+		retval = -ENOMEM;
+		goto out_release_io_1;
+	}
+
+	SET_NETDEV_DEV(dev, &pdev->dev);
+
+	pdata = netdev_priv(dev);
+	dev->irq = irq;
+	irq_flags = irq_get_trigger_type(irq);
+	pdata->ioaddr = ioremap_nocache(res->start, res_size);
+
+	pdata->dev = dev;
+	pdata->msg_enable = ((1 << debug) - 1);
+
+	platform_set_drvdata(pdev, dev);
+
+	retval = smsc911x_request_resources(pdev);
+	if (retval)
+		goto out_request_resources_fail;
+
+	retval = smsc911x_enable_resources(pdev);
+	if (retval)
+		goto out_enable_resources_fail;
+
+	if (pdata->ioaddr == NULL) {
+		SMSC_WARN(pdata, probe, "Error smsc911x base address invalid");
+		retval = -ENOMEM;
+		goto out_disable_resources;
+	}
+
+	retval = smsc911x_probe_config_dt(&pdata->config, np);
+	if (retval && config) {
+		/* copy config parameters across to pdata */
+		memcpy(&pdata->config, config, sizeof(pdata->config));
+		retval = 0;
+	}
+
+	if (retval) {
+		SMSC_WARN(pdata, probe, "Error smsc911x config not found");
+		goto out_disable_resources;
+	}
+
+	/* assume standard, non-shifted, access to HW registers */
+	pdata->ops = &standard_smsc911x_ops;
+	/* apply the right access if shifting is needed */
+	if (pdata->config.shift)
+		pdata->ops = &shifted_smsc911x_ops;
+
+	pm_runtime_enable(&pdev->dev);
+	pm_runtime_get_sync(&pdev->dev);
+
+	retval = smsc911x_init(dev);
+	if (retval < 0)
+		goto out_disable_resources;
+
+	/* configure irq polarity and type before connecting isr */
+	if (pdata->config.irq_polarity == SMSC911X_IRQ_POLARITY_ACTIVE_HIGH)
+		intcfg |= INT_CFG_IRQ_POL_;
+
+	if (pdata->config.irq_type == SMSC911X_IRQ_TYPE_PUSH_PULL)
+		intcfg |= INT_CFG_IRQ_TYPE_;
+
+	smsc911x_reg_write(pdata, INT_CFG, intcfg);
+
+	/* Ensure interrupts are globally disabled before connecting ISR */
+	smsc911x_disable_irq_chip(dev);
+
+	retval = request_irq(dev->irq, smsc911x_irqhandler,
+			     irq_flags | IRQF_SHARED, dev->name, dev);
+	if (retval) {
+		SMSC_WARN(pdata, probe,
+			  "Unable to claim requested irq: %d", dev->irq);
+		goto out_disable_resources;
+	}
+
+	netif_carrier_off(dev);
+
+	retval = register_netdev(dev);
+	if (retval) {
+		SMSC_WARN(pdata, probe, "Error %i registering device", retval);
+		goto out_free_irq;
+	} else {
+		SMSC_TRACE(pdata, probe,
+			   "Network interface: \"%s\"", dev->name);
+	}
+
+	retval = smsc911x_mii_init(pdev, dev);
+	if (retval) {
+		SMSC_WARN(pdata, probe, "Error %i initialising mii", retval);
+		goto out_unregister_netdev_5;
+	}
+
+	spin_lock_irq(&pdata->mac_lock);
+
+	/* Check if mac address has been specified when bringing interface up */
+	if (is_valid_ether_addr(dev->dev_addr)) {
+		smsc911x_set_hw_mac_address(pdata, dev->dev_addr);
+		SMSC_TRACE(pdata, probe,
+			   "MAC Address is specified by configuration");
+	} else if (is_valid_ether_addr(pdata->config.mac)) {
+		memcpy(dev->dev_addr, pdata->config.mac, ETH_ALEN);
+		SMSC_TRACE(pdata, probe,
+			   "MAC Address specified by platform data");
+	} else {
+		/* Try reading mac address from device. if EEPROM is present
+		 * it will already have been set */
+		smsc_get_mac(dev);
+
+		if (is_valid_ether_addr(dev->dev_addr)) {
+			/* eeprom values are valid  so use them */
+			SMSC_TRACE(pdata, probe,
+				   "Mac Address is read from LAN911x EEPROM");
+		} else {
+			/* eeprom values are invalid, generate random MAC */
+			eth_hw_addr_random(dev);
+			smsc911x_set_hw_mac_address(pdata, dev->dev_addr);
+			SMSC_TRACE(pdata, probe,
+				   "MAC Address is set to eth_random_addr");
+		}
+	}
+
+	spin_unlock_irq(&pdata->mac_lock);
+
+	netdev_info(dev, "MAC Address: %pM\n", dev->dev_addr);
+
+	return 0;
+
+out_unregister_netdev_5:
+	unregister_netdev(dev);
+out_free_irq:
+	free_irq(dev->irq, dev);
+out_disable_resources:
+	pm_runtime_put(&pdev->dev);
+	pm_runtime_disable(&pdev->dev);
+	(void)smsc911x_disable_resources(pdev);
+out_enable_resources_fail:
+	smsc911x_free_resources(pdev);
+out_request_resources_fail:
+	iounmap(pdata->ioaddr);
+	free_netdev(dev);
+out_release_io_1:
+	release_mem_region(res->start, resource_size(res));
+out_0:
+	return retval;
+}
+
+#ifdef CONFIG_PM
+/* This implementation assumes the devices remains powered on its VDDVARIO
+ * pins during suspend. */
+
+/* TODO: implement freeze/thaw callbacks for hibernation.*/
+
+static int smsc911x_suspend(struct device *dev)
+{
+	struct net_device *ndev = dev_get_drvdata(dev);
+	struct smsc911x_data *pdata = netdev_priv(ndev);
+
+	/* enable wake on LAN, energy detection and the external PME
+	 * signal. */
+	smsc911x_reg_write(pdata, PMT_CTRL,
+		PMT_CTRL_PM_MODE_D1_ | PMT_CTRL_WOL_EN_ |
+		PMT_CTRL_ED_EN_ | PMT_CTRL_PME_EN_);
+
+	return 0;
+}
+
+static int smsc911x_resume(struct device *dev)
+{
+	struct net_device *ndev = dev_get_drvdata(dev);
+	struct smsc911x_data *pdata = netdev_priv(ndev);
+	unsigned int to = 100;
+
+	/* Note 3.11 from the datasheet:
+	 * 	"When the LAN9220 is in a power saving state, a write of any
+	 * 	 data to the BYTE_TEST register will wake-up the device."
+	 */
+	smsc911x_reg_write(pdata, BYTE_TEST, 0);
+
+	/* poll the READY bit in PMT_CTRL. Any other access to the device is
+	 * forbidden while this bit isn't set. Try for 100ms and return -EIO
+	 * if it failed. */
+	while (!(smsc911x_reg_read(pdata, PMT_CTRL) & PMT_CTRL_READY_) && --to)
+		udelay(1000);
+
+	return (to == 0) ? -EIO : 0;
+}
+
+static const struct dev_pm_ops smsc911x_pm_ops = {
+	.suspend	= smsc911x_suspend,
+	.resume		= smsc911x_resume,
+};
+
+#define SMSC911X_PM_OPS (&smsc911x_pm_ops)
+
+#else
+#define SMSC911X_PM_OPS NULL
+#endif
+
+#ifdef CONFIG_OF
+static const struct of_device_id smsc911x_dt_ids[] = {
+	{ .compatible = "smsc,lan9115", },
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, smsc911x_dt_ids);
+#endif
+
+static struct platform_driver smsc911x_driver = {
+	.probe = smsc911x_drv_probe,
+	.remove = smsc911x_drv_remove,
+	.driver = {
+		.name	= SMSC_CHIPNAME,
+		.pm	= SMSC911X_PM_OPS,
+		.of_match_table = of_match_ptr(smsc911x_dt_ids),
+	},
+};
+
+/* Entry point for loading the module */
+static int __init smsc911x_init_module(void)
+{
+	SMSC_INITIALIZE();
+	return platform_driver_register(&smsc911x_driver);
+}
+
+/* entry point for unloading the module */
+static void __exit smsc911x_cleanup_module(void)
+{
+	platform_driver_unregister(&smsc911x_driver);
+}
+
+module_init(smsc911x_init_module);
+module_exit(smsc911x_cleanup_module);