// SPDX-License-Identifier: GPL-2.0-or-later
 /***************************************************************************
 *
 * Copyright (C) 2007-2008 SMSC
 *
 *****************************************************************************/

#include <linux/module.h>
#include <linux/kmod.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/ethtool.h>
#include <linux/mii.h>
#include <linux/usb.h>
#include <linux/bitrev.h>
#include <linux/crc16.h>
#include <linux/crc32.h>
#include <linux/usb/usbnet.h>
#include <linux/slab.h>
#include <linux/of_net.h>
#include <linux/irq.h>
#include <linux/irqdomain.h>
#include <linux/mdio.h>
#include <linux/phy.h>
#include <net/selftests.h>

#include "smsc95xx.h"

#define SMSC_CHIPNAME                   "smsc95xx"
#define HS_USB_PKT_SIZE                 (512)
#define FS_USB_PKT_SIZE                 (64)
#define DEFAULT_HS_BURST_CAP_SIZE       (16 * 1024 + 5 * HS_USB_PKT_SIZE)
#define DEFAULT_FS_BURST_CAP_SIZE       (6 * 1024 + 33 * FS_USB_PKT_SIZE)
#define DEFAULT_BULK_IN_DELAY           (0x00002000)
#define MAX_SINGLE_PACKET_SIZE          (2048)
#define LAN95XX_EEPROM_MAGIC            (0x9500)
#define EEPROM_MAC_OFFSET               (0x01)
#define DEFAULT_TX_CSUM_ENABLE          (true)
#define DEFAULT_RX_CSUM_ENABLE          (true)
#define SMSC95XX_INTERNAL_PHY_ID        (1)
#define SMSC95XX_TX_OVERHEAD            (8)
#define SMSC95XX_TX_OVERHEAD_CSUM       (12)
#define SUPPORTED_WAKE                  (WAKE_PHY | WAKE_UCAST | WAKE_BCAST | \
                                         WAKE_MCAST | WAKE_ARP | WAKE_MAGIC)

#define FEATURE_8_WAKEUP_FILTERS        (0x01)
#define FEATURE_PHY_NLP_CROSSOVER       (0x02)
#define FEATURE_REMOTE_WAKEUP           (0x04)

#define SUSPEND_SUSPEND0                (0x01)
#define SUSPEND_SUSPEND1                (0x02)
#define SUSPEND_SUSPEND2                (0x04)
#define SUSPEND_SUSPEND3                (0x08)
#define SUSPEND_ALLMODES                (SUSPEND_SUSPEND0 | SUSPEND_SUSPEND1 | \
                                         SUSPEND_SUSPEND2 | SUSPEND_SUSPEND3)

#define SMSC95XX_NR_IRQS                (1) /* raise to 12 for GPIOs */
#define PHY_HWIRQ                       (SMSC95XX_NR_IRQS - 1)

struct smsc95xx_priv {
        u32 mac_cr;
        u32 hash_hi;
        u32 hash_lo;
        u32 wolopts;
        bool pause_rx;
        bool pause_tx;
        bool pause_autoneg;
        spinlock_t mac_cr_lock;
        u8 features;
        u8 suspend_flags;
        bool is_internal_phy;
        struct irq_chip irqchip;
        struct irq_domain *irqdomain;
        struct fwnode_handle *irqfwnode;
        struct mii_bus *mdiobus;
        struct phy_device *phydev;
        struct task_struct *pm_task;
};

static bool turbo_mode = true;
module_param(turbo_mode, bool, 0644);
MODULE_PARM_DESC(turbo_mode, "Enable multiple frames per Rx transaction");

static int __must_check smsc95xx_read_reg(struct usbnet *dev, u32 index,
                                          u32 *data)
{
        struct smsc95xx_priv *pdata = dev->driver_priv;
        u32 buf;
        int ret;
        int (*fn)(struct usbnet *, u8, u8, u16, u16, void *, u16);

        if (current != pdata->pm_task)
                fn = usbnet_read_cmd;
        else
                fn = usbnet_read_cmd_nopm;

        ret = fn(dev, USB_VENDOR_REQUEST_READ_REGISTER, USB_DIR_IN
                 | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
                 0, index, &buf, 4);
        if (ret < 4) {
                ret = ret < 0 ? ret : -ENODATA;

                if (ret != -ENODEV)
                        netdev_warn(dev->net, "Failed to read reg index 0x%08x: %d\n",
                                    index, ret);
                return ret;
        }

        le32_to_cpus(&buf);
        *data = buf;

        return ret;
}

static int __must_check smsc95xx_write_reg(struct usbnet *dev, u32 index,
                                           u32 data)
{
        struct smsc95xx_priv *pdata = dev->driver_priv;
        u32 buf;
        int ret;
        int (*fn)(struct usbnet *, u8, u8, u16, u16, const void *, u16);

        if (current != pdata->pm_task)
                fn = usbnet_write_cmd;
        else
                fn = usbnet_write_cmd_nopm;

        buf = data;
        cpu_to_le32s(&buf);

        ret = fn(dev, USB_VENDOR_REQUEST_WRITE_REGISTER, USB_DIR_OUT
                 | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
                 0, index, &buf, 4);
        if (ret < 0 && ret != -ENODEV)
                netdev_warn(dev->net, "Failed to write reg index 0x%08x: %d\n",
                            index, ret);

        return ret;
}

/* Loop until the read is completed with timeout
 * called with phy_mutex held */
static int __must_check smsc95xx_phy_wait_not_busy(struct usbnet *dev)
{
        unsigned long start_time = jiffies;
        u32 val;
        int ret;

        do {
                ret = smsc95xx_read_reg(dev, MII_ADDR, &val);
                if (ret < 0) {
                        /* Ignore -ENODEV error during disconnect() */
                        if (ret == -ENODEV)
                                return 0;
                        netdev_warn(dev->net, "Error reading MII_ACCESS\n");
                        return ret;
                }

                if (!(val & MII_BUSY_))
                        return 0;
        } while (!time_after(jiffies, start_time + HZ));

        return -EIO;
}

static u32 mii_address_cmd(int phy_id, int idx, u16 op)
{
        return (phy_id & 0x1f) << 11 | (idx & 0x1f) << 6 | op;
}

static int smsc95xx_mdio_read(struct usbnet *dev, int phy_id, int idx)
{
        u32 val, addr;
        int ret;

        mutex_lock(&dev->phy_mutex);

        /* confirm MII not busy */
        ret = smsc95xx_phy_wait_not_busy(dev);
        if (ret < 0) {
                netdev_warn(dev->net, "%s: MII is busy\n", __func__);
                goto done;
        }

        /* set the address, index & direction (read from PHY) */
        addr = mii_address_cmd(phy_id, idx, MII_READ_ | MII_BUSY_);
        ret = smsc95xx_write_reg(dev, MII_ADDR, addr);
        if (ret < 0) {
                if (ret != -ENODEV)
                        netdev_warn(dev->net, "Error writing MII_ADDR\n");
                goto done;
        }

        ret = smsc95xx_phy_wait_not_busy(dev);
        if (ret < 0) {
                netdev_warn(dev->net, "Timed out reading MII reg %02X\n", idx);
                goto done;
        }

        ret = smsc95xx_read_reg(dev, MII_DATA, &val);
        if (ret < 0) {
                if (ret != -ENODEV)
                        netdev_warn(dev->net, "Error reading MII_DATA\n");
                goto done;
        }

        ret = (u16)(val & 0xFFFF);

done:
        mutex_unlock(&dev->phy_mutex);

        /* Ignore -ENODEV error during disconnect() */
        if (ret == -ENODEV)
                return 0;
        return ret;
}

static void smsc95xx_mdio_write(struct usbnet *dev, int phy_id, int idx,
                                int regval)
{
        u32 val, addr;
        int ret;

        mutex_lock(&dev->phy_mutex);

        /* confirm MII not busy */
        ret = smsc95xx_phy_wait_not_busy(dev);
        if (ret < 0) {
                netdev_warn(dev->net, "%s: MII is busy\n", __func__);
                goto done;
        }

        val = regval;
        ret = smsc95xx_write_reg(dev, MII_DATA, val);
        if (ret < 0) {
                if (ret != -ENODEV)
                        netdev_warn(dev->net, "Error writing MII_DATA\n");
                goto done;
        }

        /* set the address, index & direction (write to PHY) */
        addr = mii_address_cmd(phy_id, idx, MII_WRITE_ | MII_BUSY_);
        ret = smsc95xx_write_reg(dev, MII_ADDR, addr);
        if (ret < 0) {
                if (ret != -ENODEV)
                        netdev_warn(dev->net, "Error writing MII_ADDR\n");
                goto done;
        }

        ret = smsc95xx_phy_wait_not_busy(dev);
        if (ret < 0) {
                netdev_warn(dev->net, "Timed out writing MII reg %02X\n", idx);
                goto done;
        }

done:
        mutex_unlock(&dev->phy_mutex);
}

static int smsc95xx_mdiobus_reset(struct mii_bus *bus)
{
        struct smsc95xx_priv *pdata;
        struct usbnet *dev;
        u32 val;
        int ret;

        dev = bus->priv;
        pdata = dev->driver_priv;

        if (pdata->is_internal_phy)
                return 0;

        mutex_lock(&dev->phy_mutex);

        ret = smsc95xx_read_reg(dev, PM_CTRL, &val);
        if (ret < 0)
                goto reset_out;

        val |= PM_CTL_PHY_RST_;

        ret = smsc95xx_write_reg(dev, PM_CTRL, val);
        if (ret < 0)
                goto reset_out;

        /* Driver has no knowledge at this point about the external PHY.
         * The 802.3 specifies that the reset process shall
         * be completed within 0.5 s.
         */
        fsleep(500000);

reset_out:
        mutex_unlock(&dev->phy_mutex);

        return 0;
}

static int smsc95xx_mdiobus_read(struct mii_bus *bus, int phy_id, int idx)
{
        struct usbnet *dev = bus->priv;

        return smsc95xx_mdio_read(dev, phy_id, idx);
}

static int smsc95xx_mdiobus_write(struct mii_bus *bus, int phy_id, int idx,
                                  u16 regval)
{
        struct usbnet *dev = bus->priv;

        smsc95xx_mdio_write(dev, phy_id, idx, regval);
        return 0;
}

static int __must_check smsc95xx_wait_eeprom(struct usbnet *dev)
{
        unsigned long start_time = jiffies;
        u32 val;
        int ret;

        do {
                ret = smsc95xx_read_reg(dev, E2P_CMD, &val);
                if (ret < 0) {
                        netdev_warn(dev->net, "Error reading E2P_CMD\n");
                        return ret;
                }

                if (!(val & E2P_CMD_BUSY_) || (val & E2P_CMD_TIMEOUT_))
                        break;
                udelay(40);
        } while (!time_after(jiffies, start_time + HZ));

        if (val & (E2P_CMD_TIMEOUT_ | E2P_CMD_BUSY_)) {
                netdev_warn(dev->net, "EEPROM read operation timeout\n");
                return -EIO;
        }

        return 0;
}

static int __must_check smsc95xx_eeprom_confirm_not_busy(struct usbnet *dev)
{
        unsigned long start_time = jiffies;
        u32 val;
        int ret;

        do {
                ret = smsc95xx_read_reg(dev, E2P_CMD, &val);
                if (ret < 0) {
                        netdev_warn(dev->net, "Error reading E2P_CMD\n");
                        return ret;
                }

                if (!(val & E2P_CMD_BUSY_))
                        return 0;

                udelay(40);
        } while (!time_after(jiffies, start_time + HZ));

        netdev_warn(dev->net, "EEPROM is busy\n");
        return -EIO;
}

static int smsc95xx_read_eeprom(struct usbnet *dev, u32 offset, u32 length,
                                u8 *data)
{
        u32 val;
        int i, ret;

        BUG_ON(!dev);
        BUG_ON(!data);

        ret = smsc95xx_eeprom_confirm_not_busy(dev);
        if (ret)
                return ret;

        for (i = 0; i < length; i++) {
                val = E2P_CMD_BUSY_ | E2P_CMD_READ_ | (offset & E2P_CMD_ADDR_);
                ret = smsc95xx_write_reg(dev, E2P_CMD, val);
                if (ret < 0) {
                        netdev_warn(dev->net, "Error writing E2P_CMD\n");
                        return ret;
                }

                ret = smsc95xx_wait_eeprom(dev);
                if (ret < 0)
                        return ret;

                ret = smsc95xx_read_reg(dev, E2P_DATA, &val);
                if (ret < 0) {
                        netdev_warn(dev->net, "Error reading E2P_DATA\n");
                        return ret;
                }

                data[i] = val & 0xFF;
                offset++;
        }

        return 0;
}

static int smsc95xx_write_eeprom(struct usbnet *dev, u32 offset, u32 length,
                                 u8 *data)
{
        u32 val;
        int i, ret;

        BUG_ON(!dev);
        BUG_ON(!data);

        ret = smsc95xx_eeprom_confirm_not_busy(dev);
        if (ret)
                return ret;

        /* Issue write/erase enable command */
        val = E2P_CMD_BUSY_ | E2P_CMD_EWEN_;
        ret = smsc95xx_write_reg(dev, E2P_CMD, val);
        if (ret < 0) {
                netdev_warn(dev->net, "Error writing E2P_DATA\n");
                return ret;
        }

        ret = smsc95xx_wait_eeprom(dev);
        if (ret < 0)
                return ret;

        for (i = 0; i < length; i++) {

                /* Fill data register */
                val = data[i];
                ret = smsc95xx_write_reg(dev, E2P_DATA, val);
                if (ret < 0) {
                        netdev_warn(dev->net, "Error writing E2P_DATA\n");
                        return ret;
                }

                /* Send "write" command */
                val = E2P_CMD_BUSY_ | E2P_CMD_WRITE_ | (offset & E2P_CMD_ADDR_);
                ret = smsc95xx_write_reg(dev, E2P_CMD, val);
                if (ret < 0) {
                        netdev_warn(dev->net, "Error writing E2P_CMD\n");
                        return ret;
                }

                ret = smsc95xx_wait_eeprom(dev);
                if (ret < 0)
                        return ret;

                offset++;
        }

        return 0;
}

static int __must_check smsc95xx_write_reg_async(struct usbnet *dev, u16 index,
                                                 u32 data)
{
        const u16 size = 4;
        u32 buf;
        int ret;

        buf = data;
        cpu_to_le32s(&buf);

        ret = usbnet_write_cmd_async(dev, USB_VENDOR_REQUEST_WRITE_REGISTER,
                                     USB_DIR_OUT | USB_TYPE_VENDOR |
                                     USB_RECIP_DEVICE,
                                     0, index, &buf, size);
        if (ret < 0)
                netdev_warn(dev->net, "Error write async cmd, sts=%d\n",
                            ret);
        return ret;
}

/* returns hash bit number for given MAC address
 * example:
 * 01 00 5E 00 00 01 -> returns bit number 31 */
static unsigned int smsc95xx_hash(char addr[ETH_ALEN])
{
        return (ether_crc(ETH_ALEN, addr) >> 26) & 0x3f;
}

static void smsc95xx_set_multicast(struct net_device *netdev)
{
        struct usbnet *dev = netdev_priv(netdev);
        struct smsc95xx_priv *pdata = dev->driver_priv;
        unsigned long flags;
        int ret;

        pdata->hash_hi = 0;
        pdata->hash_lo = 0;

        spin_lock_irqsave(&pdata->mac_cr_lock, flags);

        if (dev->net->flags & IFF_PROMISC) {
                netif_dbg(dev, drv, dev->net, "promiscuous mode enabled\n");
                pdata->mac_cr |= MAC_CR_PRMS_;
                pdata->mac_cr &= ~(MAC_CR_MCPAS_ | MAC_CR_HPFILT_);
        } else if (dev->net->flags & IFF_ALLMULTI) {
                netif_dbg(dev, drv, dev->net, "receive all multicast enabled\n");
                pdata->mac_cr |= MAC_CR_MCPAS_;
                pdata->mac_cr &= ~(MAC_CR_PRMS_ | MAC_CR_HPFILT_);
        } else if (!netdev_mc_empty(dev->net)) {
                struct netdev_hw_addr *ha;

                pdata->mac_cr |= MAC_CR_HPFILT_;
                pdata->mac_cr &= ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_);

                netdev_for_each_mc_addr(ha, netdev) {
                        u32 bitnum = smsc95xx_hash(ha->addr);
                        u32 mask = 0x01 << (bitnum & 0x1F);
                        if (bitnum & 0x20)
                                pdata->hash_hi |= mask;
                        else
                                pdata->hash_lo |= mask;
                }

                netif_dbg(dev, drv, dev->net, "HASHH=0x%08X, HASHL=0x%08X\n",
                                   pdata->hash_hi, pdata->hash_lo);
        } else {
                netif_dbg(dev, drv, dev->net, "receive own packets only\n");
                pdata->mac_cr &=
                        ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_ | MAC_CR_HPFILT_);
        }

        spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);

        /* Initiate async writes, as we can't wait for completion here */
        ret = smsc95xx_write_reg_async(dev, HASHH, pdata->hash_hi);
        if (ret < 0)
                netdev_warn(dev->net, "failed to initiate async write to HASHH\n");

        ret = smsc95xx_write_reg_async(dev, HASHL, pdata->hash_lo);
        if (ret < 0)
                netdev_warn(dev->net, "failed to initiate async write to HASHL\n");

        ret = smsc95xx_write_reg_async(dev, MAC_CR, pdata->mac_cr);
        if (ret < 0)
                netdev_warn(dev->net, "failed to initiate async write to MAC_CR\n");
}

static int smsc95xx_phy_update_flowcontrol(struct usbnet *dev)
{
        struct smsc95xx_priv *pdata = dev->driver_priv;
        u32 flow = 0, afc_cfg;

        int ret = smsc95xx_read_reg(dev, AFC_CFG, &afc_cfg);
        if (ret < 0)
                return ret;

        if (pdata->phydev->duplex == DUPLEX_FULL) {
                bool tx_pause, rx_pause;

                if (pdata->phydev->autoneg == AUTONEG_ENABLE &&
                    pdata->pause_autoneg) {
                        phy_get_pause(pdata->phydev, &tx_pause, &rx_pause);
                } else {
                        tx_pause = pdata->pause_tx;
                        rx_pause = pdata->pause_rx;
                }

                if (rx_pause)
                        flow = 0xFFFF0002;

                if (tx_pause) {
                        afc_cfg |= 0xF;
                        flow |= 0xFFFF0000;
                } else {
                        afc_cfg &= ~0xF;
                }

                netif_dbg(dev, link, dev->net, "rx pause %s, tx pause %s\n",
                          rx_pause ? "enabled" : "disabled",
                          tx_pause ? "enabled" : "disabled");
        } else {
                netif_dbg(dev, link, dev->net, "half duplex\n");
                afc_cfg |= 0xF;
        }

        ret = smsc95xx_write_reg(dev, FLOW, flow);
        if (ret < 0)
                return ret;

        return smsc95xx_write_reg(dev, AFC_CFG, afc_cfg);
}

static void smsc95xx_mac_update_fullduplex(struct usbnet *dev)
{
        struct smsc95xx_priv *pdata = dev->driver_priv;
        unsigned long flags;
        int ret;

        spin_lock_irqsave(&pdata->mac_cr_lock, flags);
        if (pdata->phydev->duplex != DUPLEX_FULL) {
                pdata->mac_cr &= ~MAC_CR_FDPX_;
                pdata->mac_cr |= MAC_CR_RCVOWN_;
        } else {
                pdata->mac_cr &= ~MAC_CR_RCVOWN_;
                pdata->mac_cr |= MAC_CR_FDPX_;
        }
        spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);

        ret = smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr);
        if (ret < 0) {
                if (ret != -ENODEV)
                        netdev_warn(dev->net,
                                    "Error updating MAC full duplex mode\n");
                return;
        }

        ret = smsc95xx_phy_update_flowcontrol(dev);
        if (ret < 0)
                netdev_warn(dev->net, "Error updating PHY flow control\n");
}

static void smsc95xx_status(struct usbnet *dev, struct urb *urb)
{
        struct smsc95xx_priv *pdata = dev->driver_priv;
        unsigned long flags;
        u32 intdata;

        if (urb->actual_length != 4) {
                netdev_warn(dev->net, "unexpected urb length %d\n",
                            urb->actual_length);
                return;
        }

        intdata = get_unaligned_le32(urb->transfer_buffer);
        netif_dbg(dev, link, dev->net, "intdata: 0x%08X\n", intdata);

        local_irq_save(flags);

        if (intdata & INT_ENP_PHY_INT_)
                generic_handle_domain_irq(pdata->irqdomain, PHY_HWIRQ);
        else
                netdev_warn(dev->net, "unexpected interrupt, intdata=0x%08X\n",
                            intdata);

        local_irq_restore(flags);
}

/* Enable or disable Tx & Rx checksum offload engines */
static int smsc95xx_set_features(struct net_device *netdev,
        netdev_features_t features)
{
        struct usbnet *dev = netdev_priv(netdev);
        u32 read_buf;
        int ret;

        ret = smsc95xx_read_reg(dev, COE_CR, &read_buf);
        if (ret < 0)
                return ret;

        if (features & NETIF_F_IP_CSUM)
                read_buf |= Tx_COE_EN_;
        else
                read_buf &= ~Tx_COE_EN_;

        if (features & NETIF_F_RXCSUM)
                read_buf |= Rx_COE_EN_;
        else
                read_buf &= ~Rx_COE_EN_;

        ret = smsc95xx_write_reg(dev, COE_CR, read_buf);
        if (ret < 0)
                return ret;

        netif_dbg(dev, hw, dev->net, "COE_CR = 0x%08x\n", read_buf);
        return 0;
}

static int smsc95xx_ethtool_get_eeprom_len(struct net_device *net)
{
        return MAX_EEPROM_SIZE;
}

static int smsc95xx_ethtool_get_eeprom(struct net_device *netdev,
                                       struct ethtool_eeprom *ee, u8 *data)
{
        struct usbnet *dev = netdev_priv(netdev);

        ee->magic = LAN95XX_EEPROM_MAGIC;

        return smsc95xx_read_eeprom(dev, ee->offset, ee->len, data);
}

static int smsc95xx_ethtool_set_eeprom(struct net_device *netdev,
                                       struct ethtool_eeprom *ee, u8 *data)
{
        struct usbnet *dev = netdev_priv(netdev);

        if (ee->magic != LAN95XX_EEPROM_MAGIC) {
                netdev_warn(dev->net, "EEPROM: magic value mismatch, magic = 0x%x\n",
                            ee->magic);
                return -EINVAL;
        }

        return smsc95xx_write_eeprom(dev, ee->offset, ee->len, data);
}

static int smsc95xx_ethtool_getregslen(struct net_device *netdev)
{
        /* all smsc95xx registers */
        return COE_CR - ID_REV + sizeof(u32);
}

static void
smsc95xx_ethtool_getregs(struct net_device *netdev, struct ethtool_regs *regs,
                         void *buf)
{
        struct usbnet *dev = netdev_priv(netdev);
        unsigned int i, j;
        int retval;
        u32 *data = buf;

        retval = smsc95xx_read_reg(dev, ID_REV, &regs->version);
        if (retval < 0) {
                netdev_warn(netdev, "REGS: cannot read ID_REV\n");
                return;
        }

        for (i = ID_REV, j = 0; i <= COE_CR; i += (sizeof(u32)), j++) {
                retval = smsc95xx_read_reg(dev, i, &data[j]);
                if (retval < 0) {
                        netdev_warn(netdev, "REGS: cannot read reg[%x]\n", i);
                        return;
                }
        }
}

static void smsc95xx_ethtool_get_wol(struct net_device *net,
                                     struct ethtool_wolinfo *wolinfo)
{
        struct usbnet *dev = netdev_priv(net);
        struct smsc95xx_priv *pdata = dev->driver_priv;

        wolinfo->supported = SUPPORTED_WAKE;
        wolinfo->wolopts = pdata->wolopts;
}

static int smsc95xx_ethtool_set_wol(struct net_device *net,
                                    struct ethtool_wolinfo *wolinfo)
{
        struct usbnet *dev = netdev_priv(net);
        struct smsc95xx_priv *pdata = dev->driver_priv;
        int ret;

        if (wolinfo->wolopts & ~SUPPORTED_WAKE)
                return -EINVAL;

        pdata->wolopts = wolinfo->wolopts & SUPPORTED_WAKE;

        ret = device_set_wakeup_enable(&dev->udev->dev, pdata->wolopts);
        if (ret < 0)
                netdev_warn(dev->net, "device_set_wakeup_enable error %d\n", ret);

        return ret;
}

static u32 smsc95xx_get_link(struct net_device *net)
{
        phy_read_status(net->phydev);
        return net->phydev->link;
}

static void smsc95xx_ethtool_get_strings(struct net_device *netdev, u32 sset,
                                        u8 *data)
{
        switch (sset) {
        case ETH_SS_TEST:
                net_selftest_get_strings(data);
                break;
        }
}

static int smsc95xx_ethtool_get_sset_count(struct net_device *ndev, int sset)
{
        switch (sset) {
        case ETH_SS_TEST:
                return net_selftest_get_count();
        default:
                return -EOPNOTSUPP;
        }
}

static void smsc95xx_get_pauseparam(struct net_device *ndev,
                                    struct ethtool_pauseparam *pause)
{
        struct smsc95xx_priv *pdata;
        struct usbnet *dev;

        dev = netdev_priv(ndev);
        pdata = dev->driver_priv;

        pause->autoneg = pdata->pause_autoneg;
        pause->rx_pause = pdata->pause_rx;
        pause->tx_pause = pdata->pause_tx;
}

static int smsc95xx_set_pauseparam(struct net_device *ndev,
                                   struct ethtool_pauseparam *pause)
{
        bool pause_autoneg_rx, pause_autoneg_tx;
        struct smsc95xx_priv *pdata;
        struct phy_device *phydev;
        struct usbnet *dev;

        dev = netdev_priv(ndev);
        pdata = dev->driver_priv;
        phydev = ndev->phydev;

        if (!phydev)
                return -ENODEV;

        pdata->pause_rx = pause->rx_pause;
        pdata->pause_tx = pause->tx_pause;
        pdata->pause_autoneg = pause->autoneg;

        if (pause->autoneg) {
                pause_autoneg_rx = pause->rx_pause;
                pause_autoneg_tx = pause->tx_pause;
        } else {
                pause_autoneg_rx = false;
                pause_autoneg_tx = false;
        }

        phy_set_asym_pause(ndev->phydev, pause_autoneg_rx, pause_autoneg_tx);
        if (phydev->link && (!pause->autoneg ||
                             phydev->autoneg == AUTONEG_DISABLE))
                smsc95xx_mac_update_fullduplex(dev);

        return 0;
}

static const struct ethtool_ops smsc95xx_ethtool_ops = {
        .get_link       = smsc95xx_get_link,
        .nway_reset     = phy_ethtool_nway_reset,
        .get_drvinfo    = usbnet_get_drvinfo,
        .get_msglevel   = usbnet_get_msglevel,
        .set_msglevel   = usbnet_set_msglevel,
        .get_eeprom_len = smsc95xx_ethtool_get_eeprom_len,
        .get_eeprom     = smsc95xx_ethtool_get_eeprom,
        .set_eeprom     = smsc95xx_ethtool_set_eeprom,
        .get_regs_len   = smsc95xx_ethtool_getregslen,
        .get_regs       = smsc95xx_ethtool_getregs,
        .get_wol        = smsc95xx_ethtool_get_wol,
        .set_wol        = smsc95xx_ethtool_set_wol,
        .get_link_ksettings     = phy_ethtool_get_link_ksettings,
        .set_link_ksettings     = phy_ethtool_set_link_ksettings,
        .get_ts_info    = ethtool_op_get_ts_info,
        .self_test      = net_selftest,
        .get_strings    = smsc95xx_ethtool_get_strings,
        .get_sset_count = smsc95xx_ethtool_get_sset_count,
        .get_pauseparam = smsc95xx_get_pauseparam,
        .set_pauseparam = smsc95xx_set_pauseparam,
};

static void smsc95xx_init_mac_address(struct usbnet *dev)
{
        u8 addr[ETH_ALEN];

        /* maybe the boot loader passed the MAC address in devicetree */
        if (!platform_get_ethdev_address(&dev->udev->dev, dev->net)) {
                if (is_valid_ether_addr(dev->net->dev_addr)) {
                        /* device tree values are valid so use them */
                        netif_dbg(dev, ifup, dev->net, "MAC address read from the device tree\n");
                        return;
                }
        }

        /* try reading mac address from EEPROM */
        if (smsc95xx_read_eeprom(dev, EEPROM_MAC_OFFSET, ETH_ALEN, addr) == 0) {
                eth_hw_addr_set(dev->net, addr);
                if (is_valid_ether_addr(dev->net->dev_addr)) {
                        /* eeprom values are valid so use them */
                        netif_dbg(dev, ifup, dev->net, "MAC address read from EEPROM\n");
                        return;
                }
        }

        /* no useful static MAC address found. generate a random one */
        eth_hw_addr_random(dev->net);
        netif_dbg(dev, ifup, dev->net, "MAC address set to eth_random_addr\n");
}

static int smsc95xx_set_mac_address(struct usbnet *dev)
{
        u32 addr_lo = dev->net->dev_addr[0] | dev->net->dev_addr[1] << 8 |
                dev->net->dev_addr[2] << 16 | dev->net->dev_addr[3] << 24;
        u32 addr_hi = dev->net->dev_addr[4] | dev->net->dev_addr[5] << 8;
        int ret;

        ret = smsc95xx_write_reg(dev, ADDRL, addr_lo);
        if (ret < 0)
                return ret;

        return smsc95xx_write_reg(dev, ADDRH, addr_hi);
}

/* starts the TX path */
static int smsc95xx_start_tx_path(struct usbnet *dev)
{
        struct smsc95xx_priv *pdata = dev->driver_priv;
        unsigned long flags;
        int ret;

        /* Enable Tx at MAC */
        spin_lock_irqsave(&pdata->mac_cr_lock, flags);
        pdata->mac_cr |= MAC_CR_TXEN_;
        spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);

        ret = smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr);
        if (ret < 0)
                return ret;

        /* Enable Tx at SCSRs */
        return smsc95xx_write_reg(dev, TX_CFG, TX_CFG_ON_);
}

/* Starts the Receive path */
static int smsc95xx_start_rx_path(struct usbnet *dev)
{
        struct smsc95xx_priv *pdata = dev->driver_priv;
        unsigned long flags;

        spin_lock_irqsave(&pdata->mac_cr_lock, flags);
        pdata->mac_cr |= MAC_CR_RXEN_;
        spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);

        return smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr);
}

static int smsc95xx_reset(struct usbnet *dev)
{
        struct smsc95xx_priv *pdata = dev->driver_priv;
        u32 read_buf, burst_cap;
        int ret = 0, timeout;

        netif_dbg(dev, ifup, dev->net, "entering smsc95xx_reset\n");

        ret = smsc95xx_write_reg(dev, HW_CFG, HW_CFG_LRST_);
        if (ret < 0)
                return ret;

        timeout = 0;
        do {
                msleep(10);
                ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
                if (ret < 0)
                        return ret;
                timeout++;
        } while ((read_buf & HW_CFG_LRST_) && (timeout < 100));

        if (timeout >= 100) {
                netdev_warn(dev->net, "timeout waiting for completion of Lite Reset\n");
                return -ETIMEDOUT;
        }

        ret = smsc95xx_set_mac_address(dev);
        if (ret < 0)
                return ret;

        netif_dbg(dev, ifup, dev->net, "MAC Address: %pM\n",
                  dev->net->dev_addr);

        ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
        if (ret < 0)
                return ret;

        netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG : 0x%08x\n",
                  read_buf);

        read_buf |= HW_CFG_BIR_;

        ret = smsc95xx_write_reg(dev, HW_CFG, read_buf);
        if (ret < 0)
                return ret;

        ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
        if (ret < 0)
                return ret;

        netif_dbg(dev, ifup, dev->net,
                  "Read Value from HW_CFG after writing HW_CFG_BIR_: 0x%08x\n",
                  read_buf);

        if (!turbo_mode) {
                burst_cap = 0;
                dev->rx_urb_size = MAX_SINGLE_PACKET_SIZE;
        } else if (dev->udev->speed == USB_SPEED_HIGH) {
                burst_cap = DEFAULT_HS_BURST_CAP_SIZE / HS_USB_PKT_SIZE;
                dev->rx_urb_size = DEFAULT_HS_BURST_CAP_SIZE;
        } else {
                burst_cap = DEFAULT_FS_BURST_CAP_SIZE / FS_USB_PKT_SIZE;
                dev->rx_urb_size = DEFAULT_FS_BURST_CAP_SIZE;
        }

        netif_dbg(dev, ifup, dev->net, "rx_urb_size=%ld\n",
                  (ulong)dev->rx_urb_size);

        ret = smsc95xx_write_reg(dev, BURST_CAP, burst_cap);
        if (ret < 0)
                return ret;

        ret = smsc95xx_read_reg(dev, BURST_CAP, &read_buf);
        if (ret < 0)
                return ret;

        netif_dbg(dev, ifup, dev->net,
                  "Read Value from BURST_CAP after writing: 0x%08x\n",
                  read_buf);

        ret = smsc95xx_write_reg(dev, BULK_IN_DLY, DEFAULT_BULK_IN_DELAY);
        if (ret < 0)
                return ret;

        ret = smsc95xx_read_reg(dev, BULK_IN_DLY, &read_buf);
        if (ret < 0)
                return ret;

        netif_dbg(dev, ifup, dev->net,
                  "Read Value from BULK_IN_DLY after writing: 0x%08x\n",
                  read_buf);

        ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
        if (ret < 0)
                return ret;

        netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG: 0x%08x\n",
                  read_buf);

        if (turbo_mode)
                read_buf |= (HW_CFG_MEF_ | HW_CFG_BCE_);

        read_buf &= ~HW_CFG_RXDOFF_;

        /* set Rx data offset=2, Make IP header aligns on word boundary. */
        read_buf |= NET_IP_ALIGN << 9;

        ret = smsc95xx_write_reg(dev, HW_CFG, read_buf);
        if (ret < 0)
                return ret;

        ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
        if (ret < 0)
                return ret;

        netif_dbg(dev, ifup, dev->net,
                  "Read Value from HW_CFG after writing: 0x%08x\n", read_buf);

        ret = smsc95xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL_);
        if (ret < 0)
                return ret;

        ret = smsc95xx_read_reg(dev, ID_REV, &read_buf);
        if (ret < 0)
                return ret;
        netif_dbg(dev, ifup, dev->net, "ID_REV = 0x%08x\n", read_buf);

        ret = smsc95xx_read_reg(dev, LED_GPIO_CFG, &read_buf);
        if (ret < 0)
                return ret;
        /* Configure GPIO pins as LED outputs */
        read_buf |= LED_GPIO_CFG_SPD_LED | LED_GPIO_CFG_LNK_LED |
                    LED_GPIO_CFG_FDX_LED;
        ret = smsc95xx_write_reg(dev, LED_GPIO_CFG, read_buf);
        if (ret < 0)
                return ret;

        /* Init Tx */
        ret = smsc95xx_write_reg(dev, FLOW, 0);
        if (ret < 0)
                return ret;

        ret = smsc95xx_write_reg(dev, AFC_CFG, AFC_CFG_DEFAULT);
        if (ret < 0)
                return ret;

        /* Don't need mac_cr_lock during initialisation */
        ret = smsc95xx_read_reg(dev, MAC_CR, &pdata->mac_cr);
        if (ret < 0)
                return ret;

        /* Init Rx */
        /* Set Vlan */
        ret = smsc95xx_write_reg(dev, VLAN1, (u32)ETH_P_8021Q);
        if (ret < 0)
                return ret;

        /* Enable or disable checksum offload engines */
        ret = smsc95xx_set_features(dev->net, dev->net->features);
        if (ret < 0) {
                netdev_warn(dev->net, "Failed to set checksum offload features\n");
                return ret;
        }

        smsc95xx_set_multicast(dev->net);

        ret = smsc95xx_read_reg(dev, INT_EP_CTL, &read_buf);
        if (ret < 0)
                return ret;

        /* enable PHY interrupts */
        read_buf |= INT_EP_CTL_PHY_INT_;

        ret = smsc95xx_write_reg(dev, INT_EP_CTL, read_buf);
        if (ret < 0)
                return ret;

        ret = smsc95xx_start_tx_path(dev);
        if (ret < 0) {
                netdev_warn(dev->net, "Failed to start TX path\n");
                return ret;
        }

        ret = smsc95xx_start_rx_path(dev);
        if (ret < 0) {
                netdev_warn(dev->net, "Failed to start RX path\n");
                return ret;
        }

        netif_dbg(dev, ifup, dev->net, "smsc95xx_reset, return 0\n");
        return 0;
}

static const struct net_device_ops smsc95xx_netdev_ops = {
        .ndo_open               = usbnet_open,
        .ndo_stop               = usbnet_stop,
        .ndo_start_xmit         = usbnet_start_xmit,
        .ndo_tx_timeout         = usbnet_tx_timeout,
        .ndo_change_mtu         = usbnet_change_mtu,
        .ndo_get_stats64        = dev_get_tstats64,
        .ndo_set_mac_address    = eth_mac_addr,
        .ndo_validate_addr      = eth_validate_addr,
        .ndo_eth_ioctl          = phy_do_ioctl_running,
        .ndo_set_rx_mode        = smsc95xx_set_multicast,
        .ndo_set_features       = smsc95xx_set_features,
};

static void smsc95xx_handle_link_change(struct net_device *net)
{
        struct usbnet *dev = netdev_priv(net);

        phy_print_status(net->phydev);
        smsc95xx_mac_update_fullduplex(dev);
        usbnet_defer_kevent(dev, EVENT_LINK_CHANGE);
}

static int smsc95xx_bind(struct usbnet *dev, struct usb_interface *intf)
{
        struct smsc95xx_priv *pdata;
        char usb_path[64];
        int ret, phy_irq;
        u32 val;

        ret = usbnet_get_endpoints(dev, intf);
        if (ret < 0) {
                netdev_warn(dev->net, "usbnet_get_endpoints failed: %d\n", ret);
                return ret;
        }

        pdata = kzalloc_obj(*pdata);
        if (!pdata)
                return -ENOMEM;

        dev->driver_priv = pdata;

        spin_lock_init(&pdata->mac_cr_lock);

        /* LAN95xx devices do not alter the computed checksum of 0 to 0xffff.
         * RFC 2460, ipv6 UDP calculated checksum yields a result of zero must
         * be changed to 0xffff. RFC 768, ipv4 UDP computed checksum is zero,
         * it is transmitted as all ones. The zero transmitted checksum means
         * transmitter generated no checksum. Hence, enable csum offload only
         * for ipv4 packets.
         */
        if (DEFAULT_TX_CSUM_ENABLE)
                dev->net->features |= NETIF_F_IP_CSUM;
        if (DEFAULT_RX_CSUM_ENABLE)
                dev->net->features |= NETIF_F_RXCSUM;

        dev->net->hw_features = NETIF_F_IP_CSUM | NETIF_F_RXCSUM;
        set_bit(EVENT_NO_IP_ALIGN, &dev->flags);

        smsc95xx_init_mac_address(dev);

        /* Init all registers */
        ret = smsc95xx_reset(dev);
        if (ret)
                goto free_pdata;

        /* create irq domain for use by PHY driver and GPIO consumers */
        usb_make_path(dev->udev, usb_path, sizeof(usb_path));
        pdata->irqfwnode = irq_domain_alloc_named_fwnode(usb_path);
        if (!pdata->irqfwnode) {
                ret = -ENOMEM;
                goto free_pdata;
        }

        pdata->irqdomain = irq_domain_create_linear(pdata->irqfwnode,
                                                    SMSC95XX_NR_IRQS,
                                                    &irq_domain_simple_ops,
                                                    pdata);
        if (!pdata->irqdomain) {
                ret = -ENOMEM;
                goto free_irqfwnode;
        }

        phy_irq = irq_create_mapping(pdata->irqdomain, PHY_HWIRQ);
        if (!phy_irq) {
                ret = -ENOENT;
                goto remove_irqdomain;
        }

        pdata->irqchip = dummy_irq_chip;
        pdata->irqchip.name = SMSC_CHIPNAME;
        irq_set_chip_and_handler_name(phy_irq, &pdata->irqchip,
                                      handle_simple_irq, "phy");

        pdata->mdiobus = mdiobus_alloc();
        if (!pdata->mdiobus) {
                ret = -ENOMEM;
                goto dispose_irq;
        }

        ret = smsc95xx_read_reg(dev, HW_CFG, &val);
        if (ret < 0)
                goto free_mdio;

        pdata->is_internal_phy = !(val & HW_CFG_PSEL_);
        if (pdata->is_internal_phy)
                pdata->mdiobus->phy_mask = ~(1u << SMSC95XX_INTERNAL_PHY_ID);

        pdata->mdiobus->priv = dev;
        pdata->mdiobus->read = smsc95xx_mdiobus_read;
        pdata->mdiobus->write = smsc95xx_mdiobus_write;
        pdata->mdiobus->reset = smsc95xx_mdiobus_reset;
        pdata->mdiobus->name = "smsc95xx-mdiobus";
        pdata->mdiobus->parent = &dev->udev->dev;

        snprintf(pdata->mdiobus->id, ARRAY_SIZE(pdata->mdiobus->id),
                 "usb-%03d:%03d", dev->udev->bus->busnum, dev->udev->devnum);

        ret = mdiobus_register(pdata->mdiobus);
        if (ret) {
                netdev_err(dev->net, "Could not register MDIO bus\n");
                goto free_mdio;
        }

        pdata->phydev = phy_find_first(pdata->mdiobus);
        if (!pdata->phydev) {
                netdev_err(dev->net, "no PHY found\n");
                ret = -ENODEV;
                goto unregister_mdio;
        }

        pdata->phydev->irq = phy_irq;
        pdata->phydev->is_internal = pdata->is_internal_phy;

        /* detect device revision as different features may be available */
        ret = smsc95xx_read_reg(dev, ID_REV, &val);
        if (ret < 0)
                goto unregister_mdio;

        val >>= 16;
        if ((val == ID_REV_CHIP_ID_9500A_) || (val == ID_REV_CHIP_ID_9530_) ||
            (val == ID_REV_CHIP_ID_89530_) || (val == ID_REV_CHIP_ID_9730_))
                pdata->features = (FEATURE_8_WAKEUP_FILTERS |
                        FEATURE_PHY_NLP_CROSSOVER |
                        FEATURE_REMOTE_WAKEUP);
        else if (val == ID_REV_CHIP_ID_9512_)
                pdata->features = FEATURE_8_WAKEUP_FILTERS;

        dev->net->netdev_ops = &smsc95xx_netdev_ops;
        dev->net->ethtool_ops = &smsc95xx_ethtool_ops;
        dev->net->flags |= IFF_MULTICAST;
        dev->net->hard_header_len += SMSC95XX_TX_OVERHEAD_CSUM;
        dev->net->min_mtu = ETH_MIN_MTU;
        dev->net->max_mtu = ETH_DATA_LEN;
        dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len;

        pdata->pause_tx = true;
        pdata->pause_rx = true;
        pdata->pause_autoneg = true;
        phy_support_asym_pause(pdata->phydev);

        ret = phy_connect_direct(dev->net, pdata->phydev,
                                 &smsc95xx_handle_link_change,
                                 PHY_INTERFACE_MODE_MII);
        if (ret) {
                netdev_err(dev->net, "can't attach PHY to %s\n", pdata->mdiobus->id);
                goto unregister_mdio;
        }

        phy_attached_info(dev->net->phydev);

        return 0;

unregister_mdio:
        mdiobus_unregister(pdata->mdiobus);

free_mdio:
        mdiobus_free(pdata->mdiobus);

dispose_irq:
        irq_dispose_mapping(phy_irq);

remove_irqdomain:
        irq_domain_remove(pdata->irqdomain);

free_irqfwnode:
        irq_domain_free_fwnode(pdata->irqfwnode);

free_pdata:
        kfree(pdata);
        return ret;
}

static void smsc95xx_unbind(struct usbnet *dev, struct usb_interface *intf)
{
        struct smsc95xx_priv *pdata = dev->driver_priv;

        phy_disconnect(dev->net->phydev);
        mdiobus_unregister(pdata->mdiobus);
        mdiobus_free(pdata->mdiobus);
        irq_dispose_mapping(irq_find_mapping(pdata->irqdomain, PHY_HWIRQ));
        irq_domain_remove(pdata->irqdomain);
        irq_domain_free_fwnode(pdata->irqfwnode);
        netif_dbg(dev, ifdown, dev->net, "free pdata\n");
        kfree(pdata);
}

static int smsc95xx_start_phy(struct usbnet *dev)
{
        phy_start(dev->net->phydev);

        return 0;
}

static int smsc95xx_stop(struct usbnet *dev)
{
        phy_stop(dev->net->phydev);

        return 0;
}

static u32 smsc_crc(const u8 *buffer, size_t len, int filter)
{
        u32 crc = bitrev16(crc16(0xFFFF, buffer, len));
        return crc << ((filter % 2) * 16);
}

static int smsc95xx_link_ok(struct usbnet *dev)
{
        struct smsc95xx_priv *pdata = dev->driver_priv;
        int ret;

        /* first, a dummy read, needed to latch some MII phys */
        ret = smsc95xx_mdio_read(dev, pdata->phydev->mdio.addr, MII_BMSR);
        if (ret < 0)
                return ret;

        ret = smsc95xx_mdio_read(dev, pdata->phydev->mdio.addr, MII_BMSR);
        if (ret < 0)
                return ret;

        return !!(ret & BMSR_LSTATUS);
}

static int smsc95xx_enter_suspend0(struct usbnet *dev)
{
        struct smsc95xx_priv *pdata = dev->driver_priv;
        u32 val;
        int ret;

        ret = smsc95xx_read_reg(dev, PM_CTRL, &val);
        if (ret < 0)
                return ret;

        val &= (~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_));
        val |= PM_CTL_SUS_MODE_0;

        ret = smsc95xx_write_reg(dev, PM_CTRL, val);
        if (ret < 0)
                return ret;

        /* clear wol status */
        val &= ~PM_CTL_WUPS_;
        val |= PM_CTL_WUPS_WOL_;

        /* enable energy detection */
        if (pdata->wolopts & WAKE_PHY)
                val |= PM_CTL_WUPS_ED_;

        ret = smsc95xx_write_reg(dev, PM_CTRL, val);
        if (ret < 0)
                return ret;

        /* read back PM_CTRL */
        ret = smsc95xx_read_reg(dev, PM_CTRL, &val);
        if (ret < 0)
                return ret;

        pdata->suspend_flags |= SUSPEND_SUSPEND0;

        return 0;
}

static int smsc95xx_enter_suspend1(struct usbnet *dev)
{
        struct smsc95xx_priv *pdata = dev->driver_priv;
        int ret, phy_id = pdata->phydev->mdio.addr;
        u32 val;

        /* reconfigure link pulse detection timing for
         * compatibility with non-standard link partners
         */
        if (pdata->features & FEATURE_PHY_NLP_CROSSOVER)
                smsc95xx_mdio_write(dev, phy_id, PHY_EDPD_CONFIG,
                                    PHY_EDPD_CONFIG_DEFAULT);

        /* enable energy detect power-down mode */
        ret = smsc95xx_mdio_read(dev, phy_id, PHY_MODE_CTRL_STS);
        if (ret < 0)
                return ret;

        ret |= MODE_CTRL_STS_EDPWRDOWN_;

        smsc95xx_mdio_write(dev, phy_id, PHY_MODE_CTRL_STS, ret);

        /* enter SUSPEND1 mode */
        ret = smsc95xx_read_reg(dev, PM_CTRL, &val);
        if (ret < 0)
                return ret;

        val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_);
        val |= PM_CTL_SUS_MODE_1;

        ret = smsc95xx_write_reg(dev, PM_CTRL, val);
        if (ret < 0)
                return ret;

        /* clear wol status, enable energy detection */
        val &= ~PM_CTL_WUPS_;
        val |= (PM_CTL_WUPS_ED_ | PM_CTL_ED_EN_);

        ret = smsc95xx_write_reg(dev, PM_CTRL, val);
        if (ret < 0)
                return ret;

        pdata->suspend_flags |= SUSPEND_SUSPEND1;

        return 0;
}

static int smsc95xx_enter_suspend2(struct usbnet *dev)
{
        struct smsc95xx_priv *pdata = dev->driver_priv;
        u32 val;
        int ret;

        ret = smsc95xx_read_reg(dev, PM_CTRL, &val);
        if (ret < 0)
                return ret;

        val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_);
        val |= PM_CTL_SUS_MODE_2;

        ret = smsc95xx_write_reg(dev, PM_CTRL, val);
        if (ret < 0)
                return ret;

        pdata->suspend_flags |= SUSPEND_SUSPEND2;

        return 0;
}

static int smsc95xx_enter_suspend3(struct usbnet *dev)
{
        struct smsc95xx_priv *pdata = dev->driver_priv;
        u32 val;
        int ret;

        ret = smsc95xx_read_reg(dev, RX_FIFO_INF, &val);
        if (ret < 0)
                return ret;

        if (val & RX_FIFO_INF_USED_) {
                netdev_info(dev->net, "rx fifo not empty in autosuspend\n");
                return -EBUSY;
        }

        ret = smsc95xx_read_reg(dev, PM_CTRL, &val);
        if (ret < 0)
                return ret;

        val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_);
        val |= PM_CTL_SUS_MODE_3 | PM_CTL_RES_CLR_WKP_STS;

        ret = smsc95xx_write_reg(dev, PM_CTRL, val);
        if (ret < 0)
                return ret;

        /* clear wol status */
        val &= ~PM_CTL_WUPS_;
        val |= PM_CTL_WUPS_WOL_;

        ret = smsc95xx_write_reg(dev, PM_CTRL, val);
        if (ret < 0)
                return ret;

        pdata->suspend_flags |= SUSPEND_SUSPEND3;

        return 0;
}

static int smsc95xx_autosuspend(struct usbnet *dev, u32 link_up)
{
        struct smsc95xx_priv *pdata = dev->driver_priv;

        if (!netif_running(dev->net)) {
                /* interface is ifconfig down so fully power down hw */
                netdev_dbg(dev->net, "autosuspend entering SUSPEND2\n");
                return smsc95xx_enter_suspend2(dev);
        }

        if (!link_up) {
                /* link is down so enter EDPD mode, but only if device can
                 * reliably resume from it.  This check should be redundant
                 * as current FEATURE_REMOTE_WAKEUP parts also support
                 * FEATURE_PHY_NLP_CROSSOVER but it's included for clarity */
                if (!(pdata->features & FEATURE_PHY_NLP_CROSSOVER)) {
                        netdev_warn(dev->net, "EDPD not supported\n");
                        return -EBUSY;
                }

                netdev_dbg(dev->net, "autosuspend entering SUSPEND1\n");
                netdev_info(dev->net, "entering SUSPEND1 mode\n");
                return smsc95xx_enter_suspend1(dev);
        }

        netdev_dbg(dev->net, "autosuspend entering SUSPEND3\n");
        return smsc95xx_enter_suspend3(dev);
}

static int smsc95xx_suspend(struct usb_interface *intf, pm_message_t message)
{
        struct usbnet *dev = usb_get_intfdata(intf);
        struct smsc95xx_priv *pdata = dev->driver_priv;
        u32 val, link_up;
        int ret;

        pdata->pm_task = current;

        ret = usbnet_suspend(intf, message);
        if (ret < 0) {
                netdev_warn(dev->net, "usbnet_suspend error\n");
                pdata->pm_task = NULL;
                return ret;
        }

        if (pdata->suspend_flags) {
                netdev_warn(dev->net, "error during last resume\n");
                pdata->suspend_flags = 0;
        }

        link_up = smsc95xx_link_ok(dev);

        if (message.event == PM_EVENT_AUTO_SUSPEND &&
            (pdata->features & FEATURE_REMOTE_WAKEUP)) {
                ret = smsc95xx_autosuspend(dev, link_up);
                goto done;
        }

        /* if we get this far we're not autosuspending */
        /* if no wol options set, or if link is down and we're not waking on
         * PHY activity, enter lowest power SUSPEND2 mode
         */
        if (!(pdata->wolopts & SUPPORTED_WAKE) ||
                !(link_up || (pdata->wolopts & WAKE_PHY))) {
                netdev_info(dev->net, "entering SUSPEND2 mode\n");

                /* disable energy detect (link up) & wake up events */
                ret = smsc95xx_read_reg(dev, WUCSR, &val);
                if (ret < 0)
                        goto done;

                val &= ~(WUCSR_MPEN_ | WUCSR_WAKE_EN_);

                ret = smsc95xx_write_reg(dev, WUCSR, val);
                if (ret < 0)
                        goto done;

                ret = smsc95xx_read_reg(dev, PM_CTRL, &val);
                if (ret < 0)
                        goto done;

                val &= ~(PM_CTL_ED_EN_ | PM_CTL_WOL_EN_);

                ret = smsc95xx_write_reg(dev, PM_CTRL, val);
                if (ret < 0)
                        goto done;

                ret = smsc95xx_enter_suspend2(dev);
                goto done;
        }

        if (pdata->wolopts & WAKE_PHY) {
                /* if link is down then configure EDPD and enter SUSPEND1,
                 * otherwise enter SUSPEND0 below
                 */
                if (!link_up) {
                        netdev_info(dev->net, "entering SUSPEND1 mode\n");
                        ret = smsc95xx_enter_suspend1(dev);
                        goto done;
                }
        }

        if (pdata->wolopts & (WAKE_BCAST | WAKE_MCAST | WAKE_ARP | WAKE_UCAST)) {
                u32 *filter_mask = kcalloc(32, sizeof(u32), GFP_KERNEL);
                u32 command[2];
                u32 offset[2];
                u32 crc[4];
                int wuff_filter_count =
                        (pdata->features & FEATURE_8_WAKEUP_FILTERS) ?
                        LAN9500A_WUFF_NUM : LAN9500_WUFF_NUM;
                int i, filter = 0;

                if (!filter_mask) {
                        netdev_warn(dev->net, "Unable to allocate filter_mask\n");
                        ret = -ENOMEM;
                        goto done;
                }

                memset(command, 0, sizeof(command));
                memset(offset, 0, sizeof(offset));
                memset(crc, 0, sizeof(crc));

                if (pdata->wolopts & WAKE_BCAST) {
                        const u8 bcast[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
                        netdev_info(dev->net, "enabling broadcast detection\n");
                        filter_mask[filter * 4] = 0x003F;
                        filter_mask[filter * 4 + 1] = 0x00;
                        filter_mask[filter * 4 + 2] = 0x00;
                        filter_mask[filter * 4 + 3] = 0x00;
                        command[filter/4] |= 0x05UL << ((filter % 4) * 8);
                        offset[filter/4] |= 0x00 << ((filter % 4) * 8);
                        crc[filter/2] |= smsc_crc(bcast, 6, filter);
                        filter++;
                }

                if (pdata->wolopts & WAKE_MCAST) {
                        const u8 mcast[] = {0x01, 0x00, 0x5E};
                        netdev_info(dev->net, "enabling multicast detection\n");
                        filter_mask[filter * 4] = 0x0007;
                        filter_mask[filter * 4 + 1] = 0x00;
                        filter_mask[filter * 4 + 2] = 0x00;
                        filter_mask[filter * 4 + 3] = 0x00;
                        command[filter/4] |= 0x09UL << ((filter % 4) * 8);
                        offset[filter/4] |= 0x00  << ((filter % 4) * 8);
                        crc[filter/2] |= smsc_crc(mcast, 3, filter);
                        filter++;
                }

                if (pdata->wolopts & WAKE_ARP) {
                        const u8 arp[] = {0x08, 0x06};
                        netdev_info(dev->net, "enabling ARP detection\n");
                        filter_mask[filter * 4] = 0x0003;
                        filter_mask[filter * 4 + 1] = 0x00;
                        filter_mask[filter * 4 + 2] = 0x00;
                        filter_mask[filter * 4 + 3] = 0x00;
                        command[filter/4] |= 0x05UL << ((filter % 4) * 8);
                        offset[filter/4] |= 0x0C << ((filter % 4) * 8);
                        crc[filter/2] |= smsc_crc(arp, 2, filter);
                        filter++;
                }

                if (pdata->wolopts & WAKE_UCAST) {
                        netdev_info(dev->net, "enabling unicast detection\n");
                        filter_mask[filter * 4] = 0x003F;
                        filter_mask[filter * 4 + 1] = 0x00;
                        filter_mask[filter * 4 + 2] = 0x00;
                        filter_mask[filter * 4 + 3] = 0x00;
                        command[filter/4] |= 0x01UL << ((filter % 4) * 8);
                        offset[filter/4] |= 0x00 << ((filter % 4) * 8);
                        crc[filter/2] |= smsc_crc(dev->net->dev_addr, ETH_ALEN, filter);
                        filter++;
                }

                for (i = 0; i < (wuff_filter_count * 4); i++) {
                        ret = smsc95xx_write_reg(dev, WUFF, filter_mask[i]);
                        if (ret < 0) {
                                kfree(filter_mask);
                                goto done;
                        }
                }
                kfree(filter_mask);

                for (i = 0; i < (wuff_filter_count / 4); i++) {
                        ret = smsc95xx_write_reg(dev, WUFF, command[i]);
                        if (ret < 0)
                                goto done;
                }

                for (i = 0; i < (wuff_filter_count / 4); i++) {
                        ret = smsc95xx_write_reg(dev, WUFF, offset[i]);
                        if (ret < 0)
                                goto done;
                }

                for (i = 0; i < (wuff_filter_count / 2); i++) {
                        ret = smsc95xx_write_reg(dev, WUFF, crc[i]);
                        if (ret < 0)
                                goto done;
                }

                /* clear any pending pattern match packet status */
                ret = smsc95xx_read_reg(dev, WUCSR, &val);
                if (ret < 0)
                        goto done;

                val |= WUCSR_WUFR_;

                ret = smsc95xx_write_reg(dev, WUCSR, val);
                if (ret < 0)
                        goto done;
        }

        if (pdata->wolopts & WAKE_MAGIC) {
                /* clear any pending magic packet status */
                ret = smsc95xx_read_reg(dev, WUCSR, &val);
                if (ret < 0)
                        goto done;

                val |= WUCSR_MPR_;

                ret = smsc95xx_write_reg(dev, WUCSR, val);
                if (ret < 0)
                        goto done;
        }

        /* enable/disable wakeup sources */
        ret = smsc95xx_read_reg(dev, WUCSR, &val);
        if (ret < 0)
                goto done;

        if (pdata->wolopts & (WAKE_BCAST | WAKE_MCAST | WAKE_ARP | WAKE_UCAST)) {
                netdev_info(dev->net, "enabling pattern match wakeup\n");
                val |= WUCSR_WAKE_EN_;
        } else {
                netdev_info(dev->net, "disabling pattern match wakeup\n");
                val &= ~WUCSR_WAKE_EN_;
        }

        if (pdata->wolopts & WAKE_MAGIC) {
                netdev_info(dev->net, "enabling magic packet wakeup\n");
                val |= WUCSR_MPEN_;
        } else {
                netdev_info(dev->net, "disabling magic packet wakeup\n");
                val &= ~WUCSR_MPEN_;
        }

        ret = smsc95xx_write_reg(dev, WUCSR, val);
        if (ret < 0)
                goto done;

        /* enable wol wakeup source */
        ret = smsc95xx_read_reg(dev, PM_CTRL, &val);
        if (ret < 0)
                goto done;

        val |= PM_CTL_WOL_EN_;

        /* phy energy detect wakeup source */
        if (pdata->wolopts & WAKE_PHY)
                val |= PM_CTL_ED_EN_;

        ret = smsc95xx_write_reg(dev, PM_CTRL, val);
        if (ret < 0)
                goto done;

        /* enable receiver to enable frame reception */
        smsc95xx_start_rx_path(dev);

        /* some wol options are enabled, so enter SUSPEND0 */
        netdev_info(dev->net, "entering SUSPEND0 mode\n");
        ret = smsc95xx_enter_suspend0(dev);

done:
        /*
         * TODO: resume() might need to handle the suspend failure
         * in system sleep
         */
        if (ret && PMSG_IS_AUTO(message))
                usbnet_resume(intf);

        pdata->pm_task = NULL;
        return ret;
}

static int smsc95xx_resume(struct usb_interface *intf)
{
        struct usbnet *dev = usb_get_intfdata(intf);
        struct smsc95xx_priv *pdata;
        u8 suspend_flags;
        int ret;
        u32 val;

        BUG_ON(!dev);
        pdata = dev->driver_priv;
        suspend_flags = pdata->suspend_flags;

        netdev_dbg(dev->net, "resume suspend_flags=0x%02x\n", suspend_flags);

        /* do this first to ensure it's cleared even in error case */
        pdata->suspend_flags = 0;

        pdata->pm_task = current;

        if (suspend_flags & SUSPEND_ALLMODES) {
                /* clear wake-up sources */
                ret = smsc95xx_read_reg(dev, WUCSR, &val);
                if (ret < 0)
                        goto done;

                val &= ~(WUCSR_WAKE_EN_ | WUCSR_MPEN_);

                ret = smsc95xx_write_reg(dev, WUCSR, val);
                if (ret < 0)
                        goto done;

                /* clear wake-up status */
                ret = smsc95xx_read_reg(dev, PM_CTRL, &val);
                if (ret < 0)
                        goto done;

                val &= ~PM_CTL_WOL_EN_;
                val |= PM_CTL_WUPS_;

                ret = smsc95xx_write_reg(dev, PM_CTRL, val);
                if (ret < 0)
                        goto done;
        }

        phy_init_hw(pdata->phydev);

        ret = usbnet_resume(intf);
        if (ret < 0)
                netdev_warn(dev->net, "usbnet_resume error\n");

done:
        pdata->pm_task = NULL;
        return ret;
}

static int smsc95xx_reset_resume(struct usb_interface *intf)
{
        struct usbnet *dev = usb_get_intfdata(intf);
        struct smsc95xx_priv *pdata = dev->driver_priv;
        int ret;

        pdata->pm_task = current;
        ret = smsc95xx_reset(dev);
        pdata->pm_task = NULL;
        if (ret < 0)
                return ret;

        return smsc95xx_resume(intf);
}

static void smsc95xx_rx_csum_offload(struct sk_buff *skb)
{
        u16 *csum_ptr = (u16 *)(skb_tail_pointer(skb) - 2);

        skb->csum = (__force __wsum)get_unaligned(csum_ptr);
        skb->ip_summed = CHECKSUM_COMPLETE;
        skb_trim(skb, skb->len - 2); /* remove csum */
}

static int smsc95xx_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
{
        /* This check is no longer done by usbnet */
        if (skb->len < dev->net->hard_header_len)
                return 0;

        while (skb->len > 0) {
                u32 header, align_count;
                struct sk_buff *ax_skb;
                unsigned char *packet;
                u16 size;

                header = get_unaligned_le32(skb->data);
                skb_pull(skb, 4 + NET_IP_ALIGN);
                packet = skb->data;

                /* get the packet length */
                size = (u16)((header & RX_STS_FL_) >> 16);
                align_count = (4 - ((size + NET_IP_ALIGN) % 4)) % 4;

                if (unlikely(size > skb->len)) {
                        netif_dbg(dev, rx_err, dev->net,
                                  "size err header=0x%08x\n", header);
                        return 0;
                }

                if (unlikely(header & RX_STS_ES_)) {
                        netif_dbg(dev, rx_err, dev->net,
                                  "Error header=0x%08x\n", header);
                        dev->net->stats.rx_errors++;
                        dev->net->stats.rx_dropped++;

                        if (header & RX_STS_CRC_) {
                                dev->net->stats.rx_crc_errors++;
                        } else {
                                if (header & (RX_STS_TL_ | RX_STS_RF_))
                                        dev->net->stats.rx_frame_errors++;

                                if ((header & RX_STS_LE_) &&
                                        (!(header & RX_STS_FT_)))
                                        dev->net->stats.rx_length_errors++;
                        }
                } else {
                        /* ETH_FRAME_LEN + 4(CRC) + 2(COE) + 4(Vlan) */
                        if (unlikely(size > (ETH_FRAME_LEN + 12))) {
                                netif_dbg(dev, rx_err, dev->net,
                                          "size err header=0x%08x\n", header);
                                return 0;
                        }

                        /* last frame in this batch */
                        if (skb->len == size) {
                                if (dev->net->features & NETIF_F_RXCSUM)
                                        smsc95xx_rx_csum_offload(skb);
                                skb_trim(skb, skb->len - 4); /* remove fcs */

                                return 1;
                        }

                        ax_skb = netdev_alloc_skb_ip_align(dev->net, size);
                        if (unlikely(!ax_skb)) {
                                netdev_warn(dev->net, "Error allocating skb\n");
                                return 0;
                        }

                        skb_put(ax_skb, size);
                        memcpy(ax_skb->data, packet, size);

                        if (dev->net->features & NETIF_F_RXCSUM)
                                smsc95xx_rx_csum_offload(ax_skb);
                        skb_trim(ax_skb, ax_skb->len - 4); /* remove fcs */

                        usbnet_skb_return(dev, ax_skb);
                }

                skb_pull(skb, size);

                /* padding bytes before the next frame starts */
                if (skb->len)
                        skb_pull(skb, align_count);
        }

        return 1;
}

static u32 smsc95xx_calc_csum_preamble(struct sk_buff *skb)
{
        u16 low_16 = (u16)skb_checksum_start_offset(skb);
        u16 high_16 = low_16 + skb->csum_offset;
        return (high_16 << 16) | low_16;
}

/* The TX CSUM won't work if the checksum lies in the last 4 bytes of the
 * transmission. This is fairly unlikely, only seems to trigger with some
 * short TCP ACK packets sent.
 *
 * Note, this calculation should probably check for the alignment of the
 * data as well, but a straight check for csum being in the last four bytes
 * of the packet should be ok for now.
 */
static bool smsc95xx_can_tx_checksum(struct sk_buff *skb)
{
       unsigned int len = skb->len - skb_checksum_start_offset(skb);

       if (skb->len <= 45)
               return false;
       return skb->csum_offset < (len - (4 + 1));
}

static struct sk_buff *smsc95xx_tx_fixup(struct usbnet *dev,
                                         struct sk_buff *skb, gfp_t flags)
{
        bool csum = skb->ip_summed == CHECKSUM_PARTIAL;
        int overhead = csum ? SMSC95XX_TX_OVERHEAD_CSUM : SMSC95XX_TX_OVERHEAD;
        u32 tx_cmd_a, tx_cmd_b;
        void *ptr;

        /* We do not advertise SG, so skbs should be already linearized */
        BUG_ON(skb_shinfo(skb)->nr_frags);

        /* Make writable and expand header space by overhead if required */
        if (skb_cow_head(skb, overhead)) {
                /* Must deallocate here as returning NULL to indicate error
                 * means the skb won't be deallocated in the caller.
                 */
                dev_kfree_skb_any(skb);
                return NULL;
        }

        tx_cmd_b = (u32)skb->len;
        tx_cmd_a = tx_cmd_b | TX_CMD_A_FIRST_SEG_ | TX_CMD_A_LAST_SEG_;

        if (csum) {
                if (!smsc95xx_can_tx_checksum(skb)) {
                        /* workaround - hardware tx checksum does not work
                         * properly with extremely small packets */
                        long csstart = skb_checksum_start_offset(skb);
                        __wsum calc = csum_partial(skb->data + csstart,
                                skb->len - csstart, 0);
                        *((__sum16 *)(skb->data + csstart
                                + skb->csum_offset)) = csum_fold(calc);

                        csum = false;
                } else {
                        u32 csum_preamble = smsc95xx_calc_csum_preamble(skb);
                        ptr = skb_push(skb, 4);
                        put_unaligned_le32(csum_preamble, ptr);

                        tx_cmd_a += 4;
                        tx_cmd_b += 4;
                        tx_cmd_b |= TX_CMD_B_CSUM_ENABLE;
                }
        }

        ptr = skb_push(skb, 8);
        put_unaligned_le32(tx_cmd_a, ptr);
        put_unaligned_le32(tx_cmd_b, ptr+4);

        return skb;
}

static int smsc95xx_manage_power(struct usbnet *dev, int on)
{
        struct smsc95xx_priv *pdata = dev->driver_priv;

        dev->intf->needs_remote_wakeup = on;

        if (pdata->features & FEATURE_REMOTE_WAKEUP)
                return 0;

        /* this chip revision isn't capable of remote wakeup */
        netdev_info(dev->net, "hardware isn't capable of remote wakeup\n");

        if (on)
                usb_autopm_get_interface_no_resume(dev->intf);
        else
                usb_autopm_put_interface(dev->intf);

        return 0;
}

static const struct driver_info smsc95xx_info = {
        .description    = "smsc95xx USB 2.0 Ethernet",
        .bind           = smsc95xx_bind,
        .unbind         = smsc95xx_unbind,
        .reset          = smsc95xx_reset,
        .check_connect  = smsc95xx_start_phy,
        .stop           = smsc95xx_stop,
        .rx_fixup       = smsc95xx_rx_fixup,
        .tx_fixup       = smsc95xx_tx_fixup,
        .status         = smsc95xx_status,
        .manage_power   = smsc95xx_manage_power,
        .flags          = FLAG_ETHER | FLAG_SEND_ZLP | FLAG_LINK_INTR,
};

static const struct usb_device_id products[] = {
        {
                /* SMSC9500 USB Ethernet Device */
                USB_DEVICE(0x0424, 0x9500),
                .driver_info = (unsigned long) &smsc95xx_info,
        },
        {
                /* SMSC9505 USB Ethernet Device */
                USB_DEVICE(0x0424, 0x9505),
                .driver_info = (unsigned long) &smsc95xx_info,
        },
        {
                /* SMSC9500A USB Ethernet Device */
                USB_DEVICE(0x0424, 0x9E00),
                .driver_info = (unsigned long) &smsc95xx_info,
        },
        {
                /* SMSC9505A USB Ethernet Device */
                USB_DEVICE(0x0424, 0x9E01),
                .driver_info = (unsigned long) &smsc95xx_info,
        },
        {
                /* SMSC9512/9514 USB Hub & Ethernet Device */
                USB_DEVICE(0x0424, 0xec00),
                .driver_info = (unsigned long) &smsc95xx_info,
        },
        {
                /* SMSC9500 USB Ethernet Device (SAL10) */
                USB_DEVICE(0x0424, 0x9900),
                .driver_info = (unsigned long) &smsc95xx_info,
        },
        {
                /* SMSC9505 USB Ethernet Device (SAL10) */
                USB_DEVICE(0x0424, 0x9901),
                .driver_info = (unsigned long) &smsc95xx_info,
        },
        {
                /* SMSC9500A USB Ethernet Device (SAL10) */
                USB_DEVICE(0x0424, 0x9902),
                .driver_info = (unsigned long) &smsc95xx_info,
        },
        {
                /* SMSC9505A USB Ethernet Device (SAL10) */
                USB_DEVICE(0x0424, 0x9903),
                .driver_info = (unsigned long) &smsc95xx_info,
        },
        {
                /* SMSC9512/9514 USB Hub & Ethernet Device (SAL10) */
                USB_DEVICE(0x0424, 0x9904),
                .driver_info = (unsigned long) &smsc95xx_info,
        },
        {
                /* SMSC9500A USB Ethernet Device (HAL) */
                USB_DEVICE(0x0424, 0x9905),
                .driver_info = (unsigned long) &smsc95xx_info,
        },
        {
                /* SMSC9505A USB Ethernet Device (HAL) */
                USB_DEVICE(0x0424, 0x9906),
                .driver_info = (unsigned long) &smsc95xx_info,
        },
        {
                /* SMSC9500 USB Ethernet Device (Alternate ID) */
                USB_DEVICE(0x0424, 0x9907),
                .driver_info = (unsigned long) &smsc95xx_info,
        },
        {
                /* SMSC9500A USB Ethernet Device (Alternate ID) */
                USB_DEVICE(0x0424, 0x9908),
                .driver_info = (unsigned long) &smsc95xx_info,
        },
        {
                /* SMSC9512/9514 USB Hub & Ethernet Device (Alternate ID) */
                USB_DEVICE(0x0424, 0x9909),
                .driver_info = (unsigned long) &smsc95xx_info,
        },
        {
                /* SMSC LAN9530 USB Ethernet Device */
                USB_DEVICE(0x0424, 0x9530),
                .driver_info = (unsigned long) &smsc95xx_info,
        },
        {
                /* SMSC LAN9730 USB Ethernet Device */
                USB_DEVICE(0x0424, 0x9730),
                .driver_info = (unsigned long) &smsc95xx_info,
        },
        {
                /* SMSC LAN89530 USB Ethernet Device */
                USB_DEVICE(0x0424, 0x9E08),
                .driver_info = (unsigned long) &smsc95xx_info,
        },
        {
                /* SYSTEC USB-SPEmodule1 10BASE-T1L Ethernet Device */
                USB_DEVICE(0x0878, 0x1400),
                .driver_info = (unsigned long)&smsc95xx_info,
        },
        {
                /* Microchip's EVB-LAN8670-USB 10BASE-T1S Ethernet Device */
                USB_DEVICE(0x184F, 0x0051),
                .driver_info = (unsigned long)&smsc95xx_info,
        },
        { },            /* END */
};
MODULE_DEVICE_TABLE(usb, products);

static struct usb_driver smsc95xx_driver = {
        .name           = "smsc95xx",
        .id_table       = products,
        .probe          = usbnet_probe,
        .suspend        = smsc95xx_suspend,
        .resume         = smsc95xx_resume,
        .reset_resume   = smsc95xx_reset_resume,
        .disconnect     = usbnet_disconnect,
        .disable_hub_initiated_lpm = 1,
        .supports_autosuspend = 1,
};

module_usb_driver(smsc95xx_driver);

MODULE_AUTHOR("Nancy Lin");
MODULE_AUTHOR("Steve Glendinning <steve.glendinning@shawell.net>");
MODULE_DESCRIPTION("SMSC95XX USB 2.0 Ethernet Devices");
MODULE_LICENSE("GPL");