linux/drivers/net/usb/mcs7830.c
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   1/*
   2 * MOSCHIP MCS7830 based (7730/7830/7832) USB 2.0 Ethernet Devices
   3 *
   4 * based on usbnet.c, asix.c and the vendor provided mcs7830 driver
   5 *
   6 * Copyright (C) 2010 Andreas Mohr <andi@lisas.de>
   7 * Copyright (C) 2006 Arnd Bergmann <arnd@arndb.de>
   8 * Copyright (C) 2003-2005 David Hollis <dhollis@davehollis.com>
   9 * Copyright (C) 2005 Phil Chang <pchang23@sbcglobal.net>
  10 * Copyright (c) 2002-2003 TiVo Inc.
  11 *
  12 * Definitions gathered from MOSCHIP, Data Sheet_7830DA.pdf (thanks!).
  13 *
  14 * 2010-12-19: add 7832 USB PID ("functionality same as MCS7830"),
  15 *             per active notification by manufacturer
  16 *
  17 * TODO:
  18 * - support HIF_REG_CONFIG_SLEEPMODE/HIF_REG_CONFIG_TXENABLE (via autopm?)
  19 * - implement ethtool_ops get_pauseparam/set_pauseparam
  20 *   via HIF_REG_PAUSE_THRESHOLD (>= revision C only!)
  21 * - implement get_eeprom/[set_eeprom]
  22 * - switch PHY on/off on ifup/ifdown (perhaps in usbnet.c, via MII)
  23 * - mcs7830_get_regs() handling is weird: for rev 2 we return 32 regs,
  24 *   can access only ~ 24, remaining user buffer is uninitialized garbage
  25 * - anything else?
  26 *
  27 *
  28 * This program is free software; you can redistribute it and/or modify
  29 * it under the terms of the GNU General Public License as published by
  30 * the Free Software Foundation; either version 2 of the License, or
  31 * (at your option) any later version.
  32 *
  33 * This program is distributed in the hope that it will be useful,
  34 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  35 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  36 * GNU General Public License for more details.
  37 *
  38 * You should have received a copy of the GNU General Public License
  39 * along with this program; if not, write to the Free Software
  40 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  41 */
  42
  43#include <linux/crc32.h>
  44#include <linux/etherdevice.h>
  45#include <linux/ethtool.h>
  46#include <linux/init.h>
  47#include <linux/mii.h>
  48#include <linux/module.h>
  49#include <linux/netdevice.h>
  50#include <linux/slab.h>
  51#include <linux/usb.h>
  52#include <linux/usb/usbnet.h>
  53
  54/* requests */
  55#define MCS7830_RD_BMREQ        (USB_DIR_IN  | USB_TYPE_VENDOR | \
  56                                 USB_RECIP_DEVICE)
  57#define MCS7830_WR_BMREQ        (USB_DIR_OUT | USB_TYPE_VENDOR | \
  58                                 USB_RECIP_DEVICE)
  59#define MCS7830_RD_BREQ         0x0E
  60#define MCS7830_WR_BREQ         0x0D
  61
  62#define MCS7830_CTRL_TIMEOUT    1000
  63#define MCS7830_MAX_MCAST       64
  64
  65#define MCS7830_VENDOR_ID       0x9710
  66#define MCS7832_PRODUCT_ID      0x7832
  67#define MCS7830_PRODUCT_ID      0x7830
  68#define MCS7730_PRODUCT_ID      0x7730
  69
  70#define SITECOM_VENDOR_ID       0x0DF6
  71#define LN_030_PRODUCT_ID       0x0021
  72
  73#define MCS7830_MII_ADVERTISE   (ADVERTISE_PAUSE_CAP | ADVERTISE_100FULL | \
  74                                 ADVERTISE_100HALF | ADVERTISE_10FULL | \
  75                                 ADVERTISE_10HALF | ADVERTISE_CSMA)
  76
  77/* HIF_REG_XX corresponding index value */
  78enum {
  79        HIF_REG_MULTICAST_HASH                  = 0x00,
  80        HIF_REG_PACKET_GAP1                     = 0x08,
  81        HIF_REG_PACKET_GAP2                     = 0x09,
  82        HIF_REG_PHY_DATA                        = 0x0a,
  83        HIF_REG_PHY_CMD1                        = 0x0c,
  84           HIF_REG_PHY_CMD1_READ                = 0x40,
  85           HIF_REG_PHY_CMD1_WRITE               = 0x20,
  86           HIF_REG_PHY_CMD1_PHYADDR             = 0x01,
  87        HIF_REG_PHY_CMD2                        = 0x0d,
  88           HIF_REG_PHY_CMD2_PEND_FLAG_BIT       = 0x80,
  89           HIF_REG_PHY_CMD2_READY_FLAG_BIT      = 0x40,
  90        HIF_REG_CONFIG                          = 0x0e,
  91        /* hmm, spec sez: "R/W", "Except bit 3" (likely TXENABLE). */
  92           HIF_REG_CONFIG_CFG                   = 0x80,
  93           HIF_REG_CONFIG_SPEED100              = 0x40,
  94           HIF_REG_CONFIG_FULLDUPLEX_ENABLE     = 0x20,
  95           HIF_REG_CONFIG_RXENABLE              = 0x10,
  96           HIF_REG_CONFIG_TXENABLE              = 0x08,
  97           HIF_REG_CONFIG_SLEEPMODE             = 0x04,
  98           HIF_REG_CONFIG_ALLMULTICAST          = 0x02,
  99           HIF_REG_CONFIG_PROMISCUOUS           = 0x01,
 100        HIF_REG_ETHERNET_ADDR                   = 0x0f,
 101        HIF_REG_FRAME_DROP_COUNTER              = 0x15, /* 0..ff; reset: 0 */
 102        HIF_REG_PAUSE_THRESHOLD                 = 0x16,
 103           HIF_REG_PAUSE_THRESHOLD_DEFAULT      = 0,
 104};
 105
 106/* Trailing status byte in Ethernet Rx frame */
 107enum {
 108        MCS7830_RX_SHORT_FRAME          = 0x01, /* < 64 bytes */
 109        MCS7830_RX_LENGTH_ERROR         = 0x02, /* framelen != Ethernet length field */
 110        MCS7830_RX_ALIGNMENT_ERROR      = 0x04, /* non-even number of nibbles */
 111        MCS7830_RX_CRC_ERROR            = 0x08,
 112        MCS7830_RX_LARGE_FRAME          = 0x10, /* > 1518 bytes */
 113        MCS7830_RX_FRAME_CORRECT        = 0x20, /* frame is correct */
 114        /* [7:6] reserved */
 115};
 116
 117struct mcs7830_data {
 118        u8 multi_filter[8];
 119        u8 config;
 120        u8 link_counter;
 121};
 122
 123static const char driver_name[] = "MOSCHIP usb-ethernet driver";
 124
 125static int mcs7830_get_reg(struct usbnet *dev, u16 index, u16 size, void *data)
 126{
 127        return usbnet_read_cmd(dev, MCS7830_RD_BREQ, MCS7830_RD_BMREQ,
 128                                0x0000, index, data, size);
 129}
 130
 131static int mcs7830_set_reg(struct usbnet *dev, u16 index, u16 size, const void *data)
 132{
 133        return usbnet_write_cmd(dev, MCS7830_WR_BREQ, MCS7830_WR_BMREQ,
 134                                0x0000, index, data, size);
 135}
 136
 137static void mcs7830_set_reg_async(struct usbnet *dev, u16 index, u16 size, void *data)
 138{
 139        usbnet_write_cmd_async(dev, MCS7830_WR_BREQ, MCS7830_WR_BMREQ,
 140                                0x0000, index, data, size);
 141}
 142
 143static int mcs7830_hif_get_mac_address(struct usbnet *dev, unsigned char *addr)
 144{
 145        int ret = mcs7830_get_reg(dev, HIF_REG_ETHERNET_ADDR, ETH_ALEN, addr);
 146        if (ret < 0)
 147                return ret;
 148        return 0;
 149}
 150
 151static int mcs7830_hif_set_mac_address(struct usbnet *dev, unsigned char *addr)
 152{
 153        int ret = mcs7830_set_reg(dev, HIF_REG_ETHERNET_ADDR, ETH_ALEN, addr);
 154
 155        if (ret < 0)
 156                return ret;
 157        return 0;
 158}
 159
 160static int mcs7830_set_mac_address(struct net_device *netdev, void *p)
 161{
 162        int ret;
 163        struct usbnet *dev = netdev_priv(netdev);
 164        struct sockaddr *addr = p;
 165
 166        if (netif_running(netdev))
 167                return -EBUSY;
 168
 169        if (!is_valid_ether_addr(addr->sa_data))
 170                return -EADDRNOTAVAIL;
 171
 172        ret = mcs7830_hif_set_mac_address(dev, addr->sa_data);
 173
 174        if (ret < 0)
 175                return ret;
 176
 177        /* it worked --> adopt it on netdev side */
 178        memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
 179
 180        return 0;
 181}
 182
 183static int mcs7830_read_phy(struct usbnet *dev, u8 index)
 184{
 185        int ret;
 186        int i;
 187        __le16 val;
 188
 189        u8 cmd[2] = {
 190                HIF_REG_PHY_CMD1_READ | HIF_REG_PHY_CMD1_PHYADDR,
 191                HIF_REG_PHY_CMD2_PEND_FLAG_BIT | index,
 192        };
 193
 194        mutex_lock(&dev->phy_mutex);
 195        /* write the MII command */
 196        ret = mcs7830_set_reg(dev, HIF_REG_PHY_CMD1, 2, cmd);
 197        if (ret < 0)
 198                goto out;
 199
 200        /* wait for the data to become valid, should be within < 1ms */
 201        for (i = 0; i < 10; i++) {
 202                ret = mcs7830_get_reg(dev, HIF_REG_PHY_CMD1, 2, cmd);
 203                if ((ret < 0) || (cmd[1] & HIF_REG_PHY_CMD2_READY_FLAG_BIT))
 204                        break;
 205                ret = -EIO;
 206                msleep(1);
 207        }
 208        if (ret < 0)
 209                goto out;
 210
 211        /* read actual register contents */
 212        ret = mcs7830_get_reg(dev, HIF_REG_PHY_DATA, 2, &val);
 213        if (ret < 0)
 214                goto out;
 215        ret = le16_to_cpu(val);
 216        dev_dbg(&dev->udev->dev, "read PHY reg %02x: %04x (%d tries)\n",
 217                index, val, i);
 218out:
 219        mutex_unlock(&dev->phy_mutex);
 220        return ret;
 221}
 222
 223static int mcs7830_write_phy(struct usbnet *dev, u8 index, u16 val)
 224{
 225        int ret;
 226        int i;
 227        __le16 le_val;
 228
 229        u8 cmd[2] = {
 230                HIF_REG_PHY_CMD1_WRITE | HIF_REG_PHY_CMD1_PHYADDR,
 231                HIF_REG_PHY_CMD2_PEND_FLAG_BIT | (index & 0x1F),
 232        };
 233
 234        mutex_lock(&dev->phy_mutex);
 235
 236        /* write the new register contents */
 237        le_val = cpu_to_le16(val);
 238        ret = mcs7830_set_reg(dev, HIF_REG_PHY_DATA, 2, &le_val);
 239        if (ret < 0)
 240                goto out;
 241
 242        /* write the MII command */
 243        ret = mcs7830_set_reg(dev, HIF_REG_PHY_CMD1, 2, cmd);
 244        if (ret < 0)
 245                goto out;
 246
 247        /* wait for the command to be accepted by the PHY */
 248        for (i = 0; i < 10; i++) {
 249                ret = mcs7830_get_reg(dev, HIF_REG_PHY_CMD1, 2, cmd);
 250                if ((ret < 0) || (cmd[1] & HIF_REG_PHY_CMD2_READY_FLAG_BIT))
 251                        break;
 252                ret = -EIO;
 253                msleep(1);
 254        }
 255        if (ret < 0)
 256                goto out;
 257
 258        ret = 0;
 259        dev_dbg(&dev->udev->dev, "write PHY reg %02x: %04x (%d tries)\n",
 260                index, val, i);
 261out:
 262        mutex_unlock(&dev->phy_mutex);
 263        return ret;
 264}
 265
 266/*
 267 * This algorithm comes from the original mcs7830 version 1.4 driver,
 268 * not sure if it is needed.
 269 */
 270static int mcs7830_set_autoneg(struct usbnet *dev, int ptrUserPhyMode)
 271{
 272        int ret;
 273        /* Enable all media types */
 274        ret = mcs7830_write_phy(dev, MII_ADVERTISE, MCS7830_MII_ADVERTISE);
 275
 276        /* First reset BMCR */
 277        if (!ret)
 278                ret = mcs7830_write_phy(dev, MII_BMCR, 0x0000);
 279        /* Enable Auto Neg */
 280        if (!ret)
 281                ret = mcs7830_write_phy(dev, MII_BMCR, BMCR_ANENABLE);
 282        /* Restart Auto Neg (Keep the Enable Auto Neg Bit Set) */
 283        if (!ret)
 284                ret = mcs7830_write_phy(dev, MII_BMCR,
 285                                BMCR_ANENABLE | BMCR_ANRESTART  );
 286        return ret;
 287}
 288
 289
 290/*
 291 * if we can read register 22, the chip revision is C or higher
 292 */
 293static int mcs7830_get_rev(struct usbnet *dev)
 294{
 295        u8 dummy[2];
 296        int ret;
 297        ret = mcs7830_get_reg(dev, HIF_REG_FRAME_DROP_COUNTER, 2, dummy);
 298        if (ret > 0)
 299                return 2; /* Rev C or later */
 300        return 1; /* earlier revision */
 301}
 302
 303/*
 304 * On rev. C we need to set the pause threshold
 305 */
 306static void mcs7830_rev_C_fixup(struct usbnet *dev)
 307{
 308        u8 pause_threshold = HIF_REG_PAUSE_THRESHOLD_DEFAULT;
 309        int retry;
 310
 311        for (retry = 0; retry < 2; retry++) {
 312                if (mcs7830_get_rev(dev) == 2) {
 313                        dev_info(&dev->udev->dev, "applying rev.C fixup\n");
 314                        mcs7830_set_reg(dev, HIF_REG_PAUSE_THRESHOLD,
 315                                        1, &pause_threshold);
 316                }
 317                msleep(1);
 318        }
 319}
 320
 321static int mcs7830_mdio_read(struct net_device *netdev, int phy_id,
 322                             int location)
 323{
 324        struct usbnet *dev = netdev_priv(netdev);
 325        return mcs7830_read_phy(dev, location);
 326}
 327
 328static void mcs7830_mdio_write(struct net_device *netdev, int phy_id,
 329                                int location, int val)
 330{
 331        struct usbnet *dev = netdev_priv(netdev);
 332        mcs7830_write_phy(dev, location, val);
 333}
 334
 335static int mcs7830_ioctl(struct net_device *net, struct ifreq *rq, int cmd)
 336{
 337        struct usbnet *dev = netdev_priv(net);
 338        return generic_mii_ioctl(&dev->mii, if_mii(rq), cmd, NULL);
 339}
 340
 341static inline struct mcs7830_data *mcs7830_get_data(struct usbnet *dev)
 342{
 343        return (struct mcs7830_data *)&dev->data;
 344}
 345
 346static void mcs7830_hif_update_multicast_hash(struct usbnet *dev)
 347{
 348        struct mcs7830_data *data = mcs7830_get_data(dev);
 349        mcs7830_set_reg_async(dev, HIF_REG_MULTICAST_HASH,
 350                                sizeof data->multi_filter,
 351                                data->multi_filter);
 352}
 353
 354static void mcs7830_hif_update_config(struct usbnet *dev)
 355{
 356        /* implementation specific to data->config
 357           (argument needs to be heap-based anyway - USB DMA!) */
 358        struct mcs7830_data *data = mcs7830_get_data(dev);
 359        mcs7830_set_reg_async(dev, HIF_REG_CONFIG, 1, &data->config);
 360}
 361
 362static void mcs7830_data_set_multicast(struct net_device *net)
 363{
 364        struct usbnet *dev = netdev_priv(net);
 365        struct mcs7830_data *data = mcs7830_get_data(dev);
 366
 367        memset(data->multi_filter, 0, sizeof data->multi_filter);
 368
 369        data->config = HIF_REG_CONFIG_TXENABLE;
 370
 371        /* this should not be needed, but it doesn't work otherwise */
 372        data->config |= HIF_REG_CONFIG_ALLMULTICAST;
 373
 374        if (net->flags & IFF_PROMISC) {
 375                data->config |= HIF_REG_CONFIG_PROMISCUOUS;
 376        } else if (net->flags & IFF_ALLMULTI ||
 377                   netdev_mc_count(net) > MCS7830_MAX_MCAST) {
 378                data->config |= HIF_REG_CONFIG_ALLMULTICAST;
 379        } else if (netdev_mc_empty(net)) {
 380                /* just broadcast and directed */
 381        } else {
 382                /* We use the 20 byte dev->data
 383                 * for our 8 byte filter buffer
 384                 * to avoid allocating memory that
 385                 * is tricky to free later */
 386                struct netdev_hw_addr *ha;
 387                u32 crc_bits;
 388
 389                /* Build the multicast hash filter. */
 390                netdev_for_each_mc_addr(ha, net) {
 391                        crc_bits = ether_crc(ETH_ALEN, ha->addr) >> 26;
 392                        data->multi_filter[crc_bits >> 3] |= 1 << (crc_bits & 7);
 393                }
 394        }
 395}
 396
 397static int mcs7830_apply_base_config(struct usbnet *dev)
 398{
 399        int ret;
 400
 401        /* re-configure known MAC (suspend case etc.) */
 402        ret = mcs7830_hif_set_mac_address(dev, dev->net->dev_addr);
 403        if (ret) {
 404                dev_info(&dev->udev->dev, "Cannot set MAC address\n");
 405                goto out;
 406        }
 407
 408        /* Set up PHY */
 409        ret = mcs7830_set_autoneg(dev, 0);
 410        if (ret) {
 411                dev_info(&dev->udev->dev, "Cannot set autoneg\n");
 412                goto out;
 413        }
 414
 415        mcs7830_hif_update_multicast_hash(dev);
 416        mcs7830_hif_update_config(dev);
 417
 418        mcs7830_rev_C_fixup(dev);
 419        ret = 0;
 420out:
 421        return ret;
 422}
 423
 424/* credits go to asix_set_multicast */
 425static void mcs7830_set_multicast(struct net_device *net)
 426{
 427        struct usbnet *dev = netdev_priv(net);
 428
 429        mcs7830_data_set_multicast(net);
 430
 431        mcs7830_hif_update_multicast_hash(dev);
 432        mcs7830_hif_update_config(dev);
 433}
 434
 435static int mcs7830_get_regs_len(struct net_device *net)
 436{
 437        struct usbnet *dev = netdev_priv(net);
 438
 439        switch (mcs7830_get_rev(dev)) {
 440        case 1:
 441                return 21;
 442        case 2:
 443                return 32;
 444        }
 445        return 0;
 446}
 447
 448static void mcs7830_get_drvinfo(struct net_device *net, struct ethtool_drvinfo *drvinfo)
 449{
 450        usbnet_get_drvinfo(net, drvinfo);
 451        drvinfo->regdump_len = mcs7830_get_regs_len(net);
 452}
 453
 454static void mcs7830_get_regs(struct net_device *net, struct ethtool_regs *regs, void *data)
 455{
 456        struct usbnet *dev = netdev_priv(net);
 457
 458        regs->version = mcs7830_get_rev(dev);
 459        mcs7830_get_reg(dev, 0, regs->len, data);
 460}
 461
 462static const struct ethtool_ops mcs7830_ethtool_ops = {
 463        .get_drvinfo            = mcs7830_get_drvinfo,
 464        .get_regs_len           = mcs7830_get_regs_len,
 465        .get_regs               = mcs7830_get_regs,
 466
 467        /* common usbnet calls */
 468        .get_link               = usbnet_get_link,
 469        .get_msglevel           = usbnet_get_msglevel,
 470        .set_msglevel           = usbnet_set_msglevel,
 471        .get_settings           = usbnet_get_settings,
 472        .set_settings           = usbnet_set_settings,
 473        .nway_reset             = usbnet_nway_reset,
 474};
 475
 476static const struct net_device_ops mcs7830_netdev_ops = {
 477        .ndo_open               = usbnet_open,
 478        .ndo_stop               = usbnet_stop,
 479        .ndo_start_xmit         = usbnet_start_xmit,
 480        .ndo_tx_timeout         = usbnet_tx_timeout,
 481        .ndo_change_mtu         = usbnet_change_mtu,
 482        .ndo_validate_addr      = eth_validate_addr,
 483        .ndo_do_ioctl           = mcs7830_ioctl,
 484        .ndo_set_rx_mode        = mcs7830_set_multicast,
 485        .ndo_set_mac_address    = mcs7830_set_mac_address,
 486};
 487
 488static int mcs7830_bind(struct usbnet *dev, struct usb_interface *udev)
 489{
 490        struct net_device *net = dev->net;
 491        int ret;
 492        int retry;
 493
 494        /* Initial startup: Gather MAC address setting from EEPROM */
 495        ret = -EINVAL;
 496        for (retry = 0; retry < 5 && ret; retry++)
 497                ret = mcs7830_hif_get_mac_address(dev, net->dev_addr);
 498        if (ret) {
 499                dev_warn(&dev->udev->dev, "Cannot read MAC address\n");
 500                goto out;
 501        }
 502
 503        mcs7830_data_set_multicast(net);
 504
 505        ret = mcs7830_apply_base_config(dev);
 506        if (ret)
 507                goto out;
 508
 509        net->ethtool_ops = &mcs7830_ethtool_ops;
 510        net->netdev_ops = &mcs7830_netdev_ops;
 511
 512        /* reserve space for the status byte on rx */
 513        dev->rx_urb_size = ETH_FRAME_LEN + 1;
 514
 515        dev->mii.mdio_read = mcs7830_mdio_read;
 516        dev->mii.mdio_write = mcs7830_mdio_write;
 517        dev->mii.dev = net;
 518        dev->mii.phy_id_mask = 0x3f;
 519        dev->mii.reg_num_mask = 0x1f;
 520        dev->mii.phy_id = *((u8 *) net->dev_addr + 1);
 521
 522        ret = usbnet_get_endpoints(dev, udev);
 523out:
 524        return ret;
 525}
 526
 527/* The chip always appends a status byte that we need to strip */
 528static int mcs7830_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
 529{
 530        u8 status;
 531
 532        if (skb->len == 0) {
 533                dev_err(&dev->udev->dev, "unexpected empty rx frame\n");
 534                return 0;
 535        }
 536
 537        skb_trim(skb, skb->len - 1);
 538        status = skb->data[skb->len];
 539
 540        if (status != MCS7830_RX_FRAME_CORRECT) {
 541                dev_dbg(&dev->udev->dev, "rx fixup status %x\n", status);
 542
 543                /* hmm, perhaps usbnet.c already sees a globally visible
 544                   frame error and increments rx_errors on its own already? */
 545                dev->net->stats.rx_errors++;
 546
 547                if (status &    (MCS7830_RX_SHORT_FRAME
 548                                |MCS7830_RX_LENGTH_ERROR
 549                                |MCS7830_RX_LARGE_FRAME))
 550                        dev->net->stats.rx_length_errors++;
 551                if (status & MCS7830_RX_ALIGNMENT_ERROR)
 552                        dev->net->stats.rx_frame_errors++;
 553                if (status & MCS7830_RX_CRC_ERROR)
 554                        dev->net->stats.rx_crc_errors++;
 555        }
 556
 557        return skb->len > 0;
 558}
 559
 560static void mcs7830_status(struct usbnet *dev, struct urb *urb)
 561{
 562        u8 *buf = urb->transfer_buffer;
 563        bool link, link_changed;
 564        struct mcs7830_data *data = mcs7830_get_data(dev);
 565
 566        if (urb->actual_length < 16)
 567                return;
 568
 569        link = !(buf[1] & 0x20);
 570        link_changed = netif_carrier_ok(dev->net) != link;
 571        if (link_changed) {
 572                data->link_counter++;
 573                /*
 574                   track link state 20 times to guard against erroneous
 575                   link state changes reported sometimes by the chip
 576                 */
 577                if (data->link_counter > 20) {
 578                        data->link_counter = 0;
 579                        usbnet_link_change(dev, link, 0);
 580                        netdev_dbg(dev->net, "Link Status is: %d\n", link);
 581                }
 582        } else
 583                data->link_counter = 0;
 584}
 585
 586static const struct driver_info moschip_info = {
 587        .description    = "MOSCHIP 7830/7832/7730 usb-NET adapter",
 588        .bind           = mcs7830_bind,
 589        .rx_fixup       = mcs7830_rx_fixup,
 590        .flags          = FLAG_ETHER | FLAG_LINK_INTR,
 591        .status         = mcs7830_status,
 592        .in             = 1,
 593        .out            = 2,
 594};
 595
 596static const struct driver_info sitecom_info = {
 597        .description    = "Sitecom LN-30 usb-NET adapter",
 598        .bind           = mcs7830_bind,
 599        .rx_fixup       = mcs7830_rx_fixup,
 600        .flags          = FLAG_ETHER | FLAG_LINK_INTR,
 601        .status         = mcs7830_status,
 602        .in             = 1,
 603        .out            = 2,
 604};
 605
 606static const struct usb_device_id products[] = {
 607        {
 608                USB_DEVICE(MCS7830_VENDOR_ID, MCS7832_PRODUCT_ID),
 609                .driver_info = (unsigned long) &moschip_info,
 610        },
 611        {
 612                USB_DEVICE(MCS7830_VENDOR_ID, MCS7830_PRODUCT_ID),
 613                .driver_info = (unsigned long) &moschip_info,
 614        },
 615        {
 616                USB_DEVICE(MCS7830_VENDOR_ID, MCS7730_PRODUCT_ID),
 617                .driver_info = (unsigned long) &moschip_info,
 618        },
 619        {
 620                USB_DEVICE(SITECOM_VENDOR_ID, LN_030_PRODUCT_ID),
 621                .driver_info = (unsigned long) &sitecom_info,
 622        },
 623        {},
 624};
 625MODULE_DEVICE_TABLE(usb, products);
 626
 627static int mcs7830_reset_resume (struct usb_interface *intf)
 628{
 629        /* YES, this function is successful enough that ethtool -d
 630           does show same output pre-/post-suspend */
 631
 632        struct usbnet           *dev = usb_get_intfdata(intf);
 633
 634        mcs7830_apply_base_config(dev);
 635
 636        usbnet_resume(intf);
 637
 638        return 0;
 639}
 640
 641static struct usb_driver mcs7830_driver = {
 642        .name = driver_name,
 643        .id_table = products,
 644        .probe = usbnet_probe,
 645        .disconnect = usbnet_disconnect,
 646        .suspend = usbnet_suspend,
 647        .resume = usbnet_resume,
 648        .reset_resume = mcs7830_reset_resume,
 649        .disable_hub_initiated_lpm = 1,
 650};
 651
 652module_usb_driver(mcs7830_driver);
 653
 654MODULE_DESCRIPTION("USB to network adapter MCS7830)");
 655MODULE_LICENSE("GPL");
 656