drivers/net/usb/mcs7830.c

   1 /*
   2  * MOSCHIP MCS7830 based 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  * TODO:
  15  * - support HIF_REG_CONFIG_SLEEPMODE/HIF_REG_CONFIG_TXENABLE (via autopm?)
  16  * - implement ethtool_ops get_pauseparam/set_pauseparam
  17  *   via HIF_REG_PAUSE_THRESHOLD (>= revision C only!)
  18  * - implement get_eeprom/[set_eeprom]
  19  * - switch PHY on/off on ifup/ifdown (perhaps in usbnet.c, via MII)
  20  * - mcs7830_get_regs() handling is weird: for rev 2 we return 32 regs,
  21  *   can access only ~ 24, remaining user buffer is uninitialized garbage
  22  * - anything else?
  23  *
  24  *
  25  * This program is free software; you can redistribute it and/or modify
  26  * it under the terms of the GNU General Public License as published by
  27  * the Free Software Foundation; either version 2 of the License, or
  28  * (at your option) any later version.
  29  *
  30  * This program is distributed in the hope that it will be useful,
  31  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  32  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  33  * GNU General Public License for more details.
  34  *
  35  * You should have received a copy of the GNU General Public License
  36  * along with this program; if not, write to the Free Software
  37  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  38  */
  39
  40 #include <linux/crc32.h>
  41 #include <linux/etherdevice.h>
  42 #include <linux/ethtool.h>
  43 #include <linux/init.h>
  44 #include <linux/mii.h>
  45 #include <linux/module.h>
  46 #include <linux/netdevice.h>
  47 #include <linux/slab.h>
  48 #include <linux/usb.h>
  49 #include <linux/usb/usbnet.h>
  50
  51 /* requests */
  52 #define MCS7830_RD_BMREQ        (USB_DIR_IN  | USB_TYPE_VENDOR | \
  53                                  USB_RECIP_DEVICE)
  54 #define MCS7830_WR_BMREQ        (USB_DIR_OUT | USB_TYPE_VENDOR | \
  55                                  USB_RECIP_DEVICE)
  56 #define MCS7830_RD_BREQ         0x0E
  57 #define MCS7830_WR_BREQ         0x0D
  58
  59 #define MCS7830_CTRL_TIMEOUT    1000
  60 #define MCS7830_MAX_MCAST       64
  61
  62 #define MCS7830_VENDOR_ID       0x9710
  63 #define MCS7830_PRODUCT_ID      0x7830
  64 #define MCS7730_PRODUCT_ID      0x7730
  65
  66 #define SITECOM_VENDOR_ID       0x0DF6
  67 #define LN_030_PRODUCT_ID       0x0021
  68
  69 #define MCS7830_MII_ADVERTISE   (ADVERTISE_PAUSE_CAP | ADVERTISE_100FULL | \
  70                                  ADVERTISE_100HALF | ADVERTISE_10FULL | \
  71                                  ADVERTISE_10HALF | ADVERTISE_CSMA)
  72
  73 /* HIF_REG_XX corresponding index value */
  74 enum {
  75         HIF_REG_MULTICAST_HASH                  = 0x00,
  76         HIF_REG_PACKET_GAP1                     = 0x08,
  77         HIF_REG_PACKET_GAP2                     = 0x09,
  78         HIF_REG_PHY_DATA                        = 0x0a,
  79         HIF_REG_PHY_CMD1                        = 0x0c,
  80            HIF_REG_PHY_CMD1_READ                = 0x40,
  81            HIF_REG_PHY_CMD1_WRITE               = 0x20,
  82            HIF_REG_PHY_CMD1_PHYADDR             = 0x01,
  83         HIF_REG_PHY_CMD2                        = 0x0d,
  84            HIF_REG_PHY_CMD2_PEND_FLAG_BIT       = 0x80,
  85            HIF_REG_PHY_CMD2_READY_FLAG_BIT      = 0x40,
  86         HIF_REG_CONFIG                          = 0x0e,
  87         /* hmm, spec sez: "R/W", "Except bit 3" (likely TXENABLE). */
  88            HIF_REG_CONFIG_CFG                   = 0x80,
  89            HIF_REG_CONFIG_SPEED100              = 0x40,
  90            HIF_REG_CONFIG_FULLDUPLEX_ENABLE     = 0x20,
  91            HIF_REG_CONFIG_RXENABLE              = 0x10,
  92            HIF_REG_CONFIG_TXENABLE              = 0x08,
  93            HIF_REG_CONFIG_SLEEPMODE             = 0x04,
  94            HIF_REG_CONFIG_ALLMULTICAST          = 0x02,
  95            HIF_REG_CONFIG_PROMISCUOUS           = 0x01,
  96         HIF_REG_ETHERNET_ADDR                   = 0x0f,
  97         HIF_REG_FRAME_DROP_COUNTER              = 0x15, /* 0..ff; reset: 0 */
  98         HIF_REG_PAUSE_THRESHOLD                 = 0x16,
  99            HIF_REG_PAUSE_THRESHOLD_DEFAULT      = 0,
 100 };
 101
 102 /* Trailing status byte in Ethernet Rx frame */
 103 enum {
 104         MCS7830_RX_SHORT_FRAME          = 0x01, /* < 64 bytes */
 105         MCS7830_RX_LENGTH_ERROR         = 0x02, /* framelen != Ethernet length field */
 106         MCS7830_RX_ALIGNMENT_ERROR      = 0x04, /* non-even number of nibbles */
 107         MCS7830_RX_CRC_ERROR            = 0x08,
 108         MCS7830_RX_LARGE_FRAME          = 0x10, /* > 1518 bytes */
 109         MCS7830_RX_FRAME_CORRECT        = 0x20, /* frame is correct */
 110         /* [7:6] reserved */
 111 };
 112
 113 struct mcs7830_data {
 114         u8 multi_filter[8];
 115         u8 config;
 116 };
 117
 118 static const char driver_name[] = "MOSCHIP usb-ethernet driver";
 119
 120 static int mcs7830_get_reg(struct usbnet *dev, u16 index, u16 size, void *data)
 121 {
 122         struct usb_device *xdev = dev->udev;
 123         int ret;
 124         void *buffer;
 125
 126         buffer = kmalloc(size, GFP_NOIO);
 127         if (buffer == NULL)
 128                 return -ENOMEM;
 129
 130         ret = usb_control_msg(xdev, usb_rcvctrlpipe(xdev, 0), MCS7830_RD_BREQ,
 131                               MCS7830_RD_BMREQ, 0x0000, index, buffer,
 132                               size, MCS7830_CTRL_TIMEOUT);
 133         memcpy(data, buffer, size);
 134         kfree(buffer);
 135
 136         return ret;
 137 }
 138
 139 static int mcs7830_set_reg(struct usbnet *dev, u16 index, u16 size, const void *data)
 140 {
 141         struct usb_device *xdev = dev->udev;
 142         int ret;
 143         void *buffer;
 144
 145         buffer = kmalloc(size, GFP_NOIO);
 146         if (buffer == NULL)
 147                 return -ENOMEM;
 148
 149         memcpy(buffer, data, size);
 150
 151         ret = usb_control_msg(xdev, usb_sndctrlpipe(xdev, 0), MCS7830_WR_BREQ,
 152                               MCS7830_WR_BMREQ, 0x0000, index, buffer,
 153                               size, MCS7830_CTRL_TIMEOUT);
 154         kfree(buffer);
 155         return ret;
 156 }
 157
 158 static void mcs7830_async_cmd_callback(struct urb *urb)
 159 {
 160         struct usb_ctrlrequest *req = (struct usb_ctrlrequest *)urb->context;
 161         int status = urb->status;
 162
 163         if (status < 0)
 164                 printk(KERN_DEBUG "%s() failed with %d\n",
 165                        __func__, status);
 166
 167         kfree(req);
 168         usb_free_urb(urb);
 169 }
 170
 171 static void mcs7830_set_reg_async(struct usbnet *dev, u16 index, u16 size, void *data)
 172 {
 173         struct usb_ctrlrequest *req;
 174         int ret;
 175         struct urb *urb;
 176
 177         urb = usb_alloc_urb(0, GFP_ATOMIC);
 178         if (!urb) {
 179                 dev_dbg(&dev->udev->dev,
 180                         "Error allocating URB in write_cmd_async!\n");
 181                 return;
 182         }
 183
 184         req = kmalloc(sizeof *req, GFP_ATOMIC);
 185         if (!req) {
 186                 dev_err(&dev->udev->dev,
 187                         "Failed to allocate memory for control request\n");
 188                 goto out;
 189         }
 190         req->bRequestType = MCS7830_WR_BMREQ;
 191         req->bRequest = MCS7830_WR_BREQ;
 192         req->wValue = 0;
 193         req->wIndex = cpu_to_le16(index);
 194         req->wLength = cpu_to_le16(size);
 195
 196         usb_fill_control_urb(urb, dev->udev,
 197                              usb_sndctrlpipe(dev->udev, 0),
 198                              (void *)req, data, size,
 199                              mcs7830_async_cmd_callback, req);
 200
 201         ret = usb_submit_urb(urb, GFP_ATOMIC);
 202         if (ret < 0) {
 203                 dev_err(&dev->udev->dev,
 204                         "Error submitting the control message: ret=%d\n", ret);
 205                 goto out;
 206         }
 207         return;
 208 out:
 209         kfree(req);
 210         usb_free_urb(urb);
 211 }
 212
 213 static int mcs7830_hif_get_mac_address(struct usbnet *dev, unsigned char *addr)
 214 {
 215         int ret = mcs7830_get_reg(dev, HIF_REG_ETHERNET_ADDR, ETH_ALEN, addr);
 216         if (ret < 0)
 217                 return ret;
 218         return 0;
 219 }
 220
 221 static int mcs7830_hif_set_mac_address(struct usbnet *dev, unsigned char *addr)
 222 {
 223         int ret = mcs7830_set_reg(dev, HIF_REG_ETHERNET_ADDR, ETH_ALEN, addr);
 224
 225         if (ret < 0)
 226                 return ret;
 227         return 0;
 228 }
 229
 230 static int mcs7830_set_mac_address(struct net_device *netdev, void *p)
 231 {
 232         int ret;
 233         struct usbnet *dev = netdev_priv(netdev);
 234         struct sockaddr *addr = p;
 235
 236         if (netif_running(netdev))
 237                 return -EBUSY;
 238
 239         if (!is_valid_ether_addr(addr->sa_data))
 240                 return -EINVAL;
 241
 242         ret = mcs7830_hif_set_mac_address(dev, addr->sa_data);
 243
 244         if (ret < 0)
 245                 return ret;
 246
 247         /* it worked --> adopt it on netdev side */
 248         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
 249
 250         return 0;
 251 }
 252
 253 static int mcs7830_read_phy(struct usbnet *dev, u8 index)
 254 {
 255         int ret;
 256         int i;
 257         __le16 val;
 258
 259         u8 cmd[2] = {
 260                 HIF_REG_PHY_CMD1_READ | HIF_REG_PHY_CMD1_PHYADDR,
 261                 HIF_REG_PHY_CMD2_PEND_FLAG_BIT | index,
 262         };
 263
 264         mutex_lock(&dev->phy_mutex);
 265         /* write the MII command */
 266         ret = mcs7830_set_reg(dev, HIF_REG_PHY_CMD1, 2, cmd);
 267         if (ret < 0)
 268                 goto out;
 269
 270         /* wait for the data to become valid, should be within < 1ms */
 271         for (i = 0; i < 10; i++) {
 272                 ret = mcs7830_get_reg(dev, HIF_REG_PHY_CMD1, 2, cmd);
 273                 if ((ret < 0) || (cmd[1] & HIF_REG_PHY_CMD2_READY_FLAG_BIT))
 274                         break;
 275                 ret = -EIO;
 276                 msleep(1);
 277         }
 278         if (ret < 0)
 279                 goto out;
 280
 281         /* read actual register contents */
 282         ret = mcs7830_get_reg(dev, HIF_REG_PHY_DATA, 2, &val);
 283         if (ret < 0)
 284                 goto out;
 285         ret = le16_to_cpu(val);
 286         dev_dbg(&dev->udev->dev, "read PHY reg %02x: %04x (%d tries)\n",
 287                 index, val, i);
 288 out:
 289         mutex_unlock(&dev->phy_mutex);
 290         return ret;
 291 }
 292
 293 static int mcs7830_write_phy(struct usbnet *dev, u8 index, u16 val)
 294 {
 295         int ret;
 296         int i;
 297         __le16 le_val;
 298
 299         u8 cmd[2] = {
 300                 HIF_REG_PHY_CMD1_WRITE | HIF_REG_PHY_CMD1_PHYADDR,
 301                 HIF_REG_PHY_CMD2_PEND_FLAG_BIT | (index & 0x1F),
 302         };
 303
 304         mutex_lock(&dev->phy_mutex);
 305
 306         /* write the new register contents */
 307         le_val = cpu_to_le16(val);
 308         ret = mcs7830_set_reg(dev, HIF_REG_PHY_DATA, 2, &le_val);
 309         if (ret < 0)
 310                 goto out;
 311
 312         /* write the MII command */
 313         ret = mcs7830_set_reg(dev, HIF_REG_PHY_CMD1, 2, cmd);
 314         if (ret < 0)
 315                 goto out;
 316
 317         /* wait for the command to be accepted by the PHY */
 318         for (i = 0; i < 10; i++) {
 319                 ret = mcs7830_get_reg(dev, HIF_REG_PHY_CMD1, 2, cmd);
 320                 if ((ret < 0) || (cmd[1] & HIF_REG_PHY_CMD2_READY_FLAG_BIT))
 321                         break;
 322                 ret = -EIO;
 323                 msleep(1);
 324         }
 325         if (ret < 0)
 326                 goto out;
 327
 328         ret = 0;
 329         dev_dbg(&dev->udev->dev, "write PHY reg %02x: %04x (%d tries)\n",
 330                 index, val, i);
 331 out:
 332         mutex_unlock(&dev->phy_mutex);
 333         return ret;
 334 }
 335
 336 /*
 337  * This algorithm comes from the original mcs7830 version 1.4 driver,
 338  * not sure if it is needed.
 339  */
 340 static int mcs7830_set_autoneg(struct usbnet *dev, int ptrUserPhyMode)
 341 {
 342         int ret;
 343         /* Enable all media types */
 344         ret = mcs7830_write_phy(dev, MII_ADVERTISE, MCS7830_MII_ADVERTISE);
 345
 346         /* First reset BMCR */
 347         if (!ret)
 348                 ret = mcs7830_write_phy(dev, MII_BMCR, 0x0000);
 349         /* Enable Auto Neg */
 350         if (!ret)
 351                 ret = mcs7830_write_phy(dev, MII_BMCR, BMCR_ANENABLE);
 352         /* Restart Auto Neg (Keep the Enable Auto Neg Bit Set) */
 353         if (!ret)
 354                 ret = mcs7830_write_phy(dev, MII_BMCR,
 355                                 BMCR_ANENABLE | BMCR_ANRESTART  );
 356         return ret < 0 ? : 0;
 357 }
 358
 359
 360 /*
 361  * if we can read register 22, the chip revision is C or higher
 362  */
 363 static int mcs7830_get_rev(struct usbnet *dev)
 364 {
 365         u8 dummy[2];
 366         int ret;
 367         ret = mcs7830_get_reg(dev, HIF_REG_FRAME_DROP_COUNTER, 2, dummy);
 368         if (ret > 0)
 369                 return 2; /* Rev C or later */
 370         return 1; /* earlier revision */
 371 }
 372
 373 /*
 374  * On rev. C we need to set the pause threshold
 375  */
 376 static void mcs7830_rev_C_fixup(struct usbnet *dev)
 377 {
 378         u8 pause_threshold = HIF_REG_PAUSE_THRESHOLD_DEFAULT;
 379         int retry;
 380
 381         for (retry = 0; retry < 2; retry++) {
 382                 if (mcs7830_get_rev(dev) == 2) {
 383                         dev_info(&dev->udev->dev, "applying rev.C fixup\n");
 384                         mcs7830_set_reg(dev, HIF_REG_PAUSE_THRESHOLD,
 385                                         1, &pause_threshold);
 386                 }
 387                 msleep(1);
 388         }
 389 }
 390
 391 static int mcs7830_mdio_read(struct net_device *netdev, int phy_id,
 392                              int location)
 393 {
 394         struct usbnet *dev = netdev_priv(netdev);
 395         return mcs7830_read_phy(dev, location);
 396 }
 397
 398 static void mcs7830_mdio_write(struct net_device *netdev, int phy_id,
 399                                 int location, int val)
 400 {
 401         struct usbnet *dev = netdev_priv(netdev);
 402         mcs7830_write_phy(dev, location, val);
 403 }
 404
 405 static int mcs7830_ioctl(struct net_device *net, struct ifreq *rq, int cmd)
 406 {
 407         struct usbnet *dev = netdev_priv(net);
 408         return generic_mii_ioctl(&dev->mii, if_mii(rq), cmd, NULL);
 409 }
 410
 411 static inline struct mcs7830_data *mcs7830_get_data(struct usbnet *dev)
 412 {
 413         return (struct mcs7830_data *)&dev->data;
 414 }
 415
 416 static void mcs7830_hif_update_multicast_hash(struct usbnet *dev)
 417 {
 418         struct mcs7830_data *data = mcs7830_get_data(dev);
 419         mcs7830_set_reg_async(dev, HIF_REG_MULTICAST_HASH,
 420                                 sizeof data->multi_filter,
 421                                 data->multi_filter);
 422 }
 423
 424 static void mcs7830_hif_update_config(struct usbnet *dev)
 425 {
 426         /* implementation specific to data->config
 427            (argument needs to be heap-based anyway - USB DMA!) */
 428         struct mcs7830_data *data = mcs7830_get_data(dev);
 429         mcs7830_set_reg_async(dev, HIF_REG_CONFIG, 1, &data->config);
 430 }
 431
 432 static void mcs7830_data_set_multicast(struct net_device *net)
 433 {
 434         struct usbnet *dev = netdev_priv(net);
 435         struct mcs7830_data *data = mcs7830_get_data(dev);
 436
 437         memset(data->multi_filter, 0, sizeof data->multi_filter);
 438
 439         data->config = HIF_REG_CONFIG_TXENABLE;
 440
 441         /* this should not be needed, but it doesn't work otherwise */
 442         data->config |= HIF_REG_CONFIG_ALLMULTICAST;
 443
 444         if (net->flags & IFF_PROMISC) {
 445                 data->config |= HIF_REG_CONFIG_PROMISCUOUS;
 446         } else if (net->flags & IFF_ALLMULTI ||
 447                    netdev_mc_count(net) > MCS7830_MAX_MCAST) {
 448                 data->config |= HIF_REG_CONFIG_ALLMULTICAST;
 449         } else if (netdev_mc_empty(net)) {
 450                 /* just broadcast and directed */
 451         } else {
 452                 /* We use the 20 byte dev->data
 453                  * for our 8 byte filter buffer
 454                  * to avoid allocating memory that
 455                  * is tricky to free later */
 456                 struct dev_mc_list *mc_list;
 457                 u32 crc_bits;
 458
 459                 /* Build the multicast hash filter. */
 460                 netdev_for_each_mc_addr(mc_list, net) {
 461                         crc_bits = ether_crc(ETH_ALEN, mc_list->dmi_addr) >> 26;
 462                         data->multi_filter[crc_bits >> 3] |= 1 << (crc_bits & 7);
 463                 }
 464         }
 465 }
 466
 467 static int mcs7830_apply_base_config(struct usbnet *dev)
 468 {
 469         int ret;
 470
 471         /* re-configure known MAC (suspend case etc.) */
 472         ret = mcs7830_hif_set_mac_address(dev, dev->net->dev_addr);
 473         if (ret) {
 474                 dev_info(&dev->udev->dev, "Cannot set MAC address\n");
 475                 goto out;
 476         }
 477
 478         /* Set up PHY */
 479         ret = mcs7830_set_autoneg(dev, 0);
 480         if (ret) {
 481                 dev_info(&dev->udev->dev, "Cannot set autoneg\n");
 482                 goto out;
 483         }
 484
 485         mcs7830_hif_update_multicast_hash(dev);
 486         mcs7830_hif_update_config(dev);
 487
 488         mcs7830_rev_C_fixup(dev);
 489         ret = 0;
 490 out:
 491         return ret;
 492 }
 493
 494 /* credits go to asix_set_multicast */
 495 static void mcs7830_set_multicast(struct net_device *net)
 496 {
 497         struct usbnet *dev = netdev_priv(net);
 498
 499         mcs7830_data_set_multicast(net);
 500
 501         mcs7830_hif_update_multicast_hash(dev);
 502         mcs7830_hif_update_config(dev);
 503 }
 504
 505 static int mcs7830_get_regs_len(struct net_device *net)
 506 {
 507         struct usbnet *dev = netdev_priv(net);
 508
 509         switch (mcs7830_get_rev(dev)) {
 510         case 1:
 511                 return 21;
 512         case 2:
 513                 return 32;
 514         }
 515         return 0;
 516 }
 517
 518 static void mcs7830_get_drvinfo(struct net_device *net, struct ethtool_drvinfo *drvinfo)
 519 {
 520         usbnet_get_drvinfo(net, drvinfo);
 521         drvinfo->regdump_len = mcs7830_get_regs_len(net);
 522 }
 523
 524 static void mcs7830_get_regs(struct net_device *net, struct ethtool_regs *regs, void *data)
 525 {
 526         struct usbnet *dev = netdev_priv(net);
 527
 528         regs->version = mcs7830_get_rev(dev);
 529         mcs7830_get_reg(dev, 0, regs->len, data);
 530 }
 531
 532 static const struct ethtool_ops mcs7830_ethtool_ops = {
 533         .get_drvinfo            = mcs7830_get_drvinfo,
 534         .get_regs_len           = mcs7830_get_regs_len,
 535         .get_regs               = mcs7830_get_regs,
 536
 537         /* common usbnet calls */
 538         .get_link               = usbnet_get_link,
 539         .get_msglevel           = usbnet_get_msglevel,
 540         .set_msglevel           = usbnet_set_msglevel,
 541         .get_settings           = usbnet_get_settings,
 542         .set_settings           = usbnet_set_settings,
 543         .nway_reset             = usbnet_nway_reset,
 544 };
 545
 546 static const struct net_device_ops mcs7830_netdev_ops = {
 547         .ndo_open               = usbnet_open,
 548         .ndo_stop               = usbnet_stop,
 549         .ndo_start_xmit         = usbnet_start_xmit,
 550         .ndo_tx_timeout         = usbnet_tx_timeout,
 551         .ndo_change_mtu         = usbnet_change_mtu,
 552         .ndo_validate_addr      = eth_validate_addr,
 553         .ndo_do_ioctl           = mcs7830_ioctl,
 554         .ndo_set_multicast_list = mcs7830_set_multicast,
 555         .ndo_set_mac_address    = mcs7830_set_mac_address,
 556 };
 557
 558 static int mcs7830_bind(struct usbnet *dev, struct usb_interface *udev)
 559 {
 560         struct net_device *net = dev->net;
 561         int ret;
 562         int retry;
 563
 564         /* Initial startup: Gather MAC address setting from EEPROM */
 565         ret = -EINVAL;
 566         for (retry = 0; retry < 5 && ret; retry++)
 567                 ret = mcs7830_hif_get_mac_address(dev, net->dev_addr);
 568         if (ret) {
 569                 dev_warn(&dev->udev->dev, "Cannot read MAC address\n");
 570                 goto out;
 571         }
 572
 573         mcs7830_data_set_multicast(net);
 574
 575         ret = mcs7830_apply_base_config(dev);
 576         if (ret)
 577                 goto out;
 578
 579         net->ethtool_ops = &mcs7830_ethtool_ops;
 580         net->netdev_ops = &mcs7830_netdev_ops;
 581
 582         /* reserve space for the status byte on rx */
 583         dev->rx_urb_size = ETH_FRAME_LEN + 1;
 584
 585         dev->mii.mdio_read = mcs7830_mdio_read;
 586         dev->mii.mdio_write = mcs7830_mdio_write;
 587         dev->mii.dev = net;
 588         dev->mii.phy_id_mask = 0x3f;
 589         dev->mii.reg_num_mask = 0x1f;
 590         dev->mii.phy_id = *((u8 *) net->dev_addr + 1);
 591
 592         ret = usbnet_get_endpoints(dev, udev);
 593 out:
 594         return ret;
 595 }
 596
 597 /* The chip always appends a status byte that we need to strip */
 598 static int mcs7830_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
 599 {
 600         u8 status;
 601
 602         if (skb->len == 0) {
 603                 dev_err(&dev->udev->dev, "unexpected empty rx frame\n");
 604                 return 0;
 605         }
 606
 607         skb_trim(skb, skb->len - 1);
 608         status = skb->data[skb->len];
 609
 610         if (status != MCS7830_RX_FRAME_CORRECT) {
 611                 dev_dbg(&dev->udev->dev, "rx fixup status %x\n", status);
 612
 613                 /* hmm, perhaps usbnet.c already sees a globally visible
 614                    frame error and increments rx_errors on its own already? */
 615                 dev->net->stats.rx_errors++;
 616
 617                 if (status &    (MCS7830_RX_SHORT_FRAME
 618                                 |MCS7830_RX_LENGTH_ERROR
 619                                 |MCS7830_RX_LARGE_FRAME))
 620                         dev->net->stats.rx_length_errors++;
 621                 if (status & MCS7830_RX_ALIGNMENT_ERROR)
 622                         dev->net->stats.rx_frame_errors++;
 623                 if (status & MCS7830_RX_CRC_ERROR)
 624                         dev->net->stats.rx_crc_errors++;
 625         }
 626
 627         return skb->len > 0;
 628 }
 629
 630 static const struct driver_info moschip_info = {
 631         .description    = "MOSCHIP 7830/7730 usb-NET adapter",
 632         .bind           = mcs7830_bind,
 633         .rx_fixup       = mcs7830_rx_fixup,
 634         .flags          = FLAG_ETHER,
 635         .in             = 1,
 636         .out            = 2,
 637 };
 638
 639 static const struct driver_info sitecom_info = {
 640         .description    = "Sitecom LN-30 usb-NET adapter",
 641         .bind           = mcs7830_bind,
 642         .rx_fixup       = mcs7830_rx_fixup,
 643         .flags          = FLAG_ETHER,
 644         .in             = 1,
 645         .out            = 2,
 646 };
 647
 648 static const struct usb_device_id products[] = {
 649         {
 650                 USB_DEVICE(MCS7830_VENDOR_ID, MCS7830_PRODUCT_ID),
 651                 .driver_info = (unsigned long) &moschip_info,
 652         },
 653         {
 654                 USB_DEVICE(MCS7830_VENDOR_ID, MCS7730_PRODUCT_ID),
 655                 .driver_info = (unsigned long) &moschip_info,
 656         },
 657         {
 658                 USB_DEVICE(SITECOM_VENDOR_ID, LN_030_PRODUCT_ID),
 659                 .driver_info = (unsigned long) &sitecom_info,
 660         },
 661         {},
 662 };
 663 MODULE_DEVICE_TABLE(usb, products);
 664
 665 static int mcs7830_reset_resume (struct usb_interface *intf)
 666 {
 667         /* YES, this function is successful enough that ethtool -d
 668            does show same output pre-/post-suspend */
 669
 670         struct usbnet           *dev = usb_get_intfdata(intf);
 671
 672         mcs7830_apply_base_config(dev);
 673
 674         usbnet_resume(intf);
 675
 676         return 0;
 677 }
 678
 679 static struct usb_driver mcs7830_driver = {
 680         .name = driver_name,
 681         .id_table = products,
 682         .probe = usbnet_probe,
 683         .disconnect = usbnet_disconnect,
 684         .suspend = usbnet_suspend,
 685         .resume = usbnet_resume,
 686         .reset_resume = mcs7830_reset_resume,
 687 };
 688
 689 static int __init mcs7830_init(void)
 690 {
 691         return usb_register(&mcs7830_driver);
 692 }
 693 module_init(mcs7830_init);
 694
 695 static void __exit mcs7830_exit(void)
 696 {
 697         usb_deregister(&mcs7830_driver);
 698 }
 699 module_exit(mcs7830_exit);
 700
 701 MODULE_DESCRIPTION("USB to network adapter MCS7830)");
 702 MODULE_LICENSE("GPL");