drivers/net/usb/smsc75xx.c

   1  /***************************************************************************
   2  *
   3  * Copyright (C) 2007-2010 SMSC
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License
   7  * as published by the Free Software Foundation; either version 2
   8  * of the License, or (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  18  *
  19  *****************************************************************************/
  20
  21 #include <linux/module.h>
  22 #include <linux/kmod.h>
  23 #include <linux/init.h>
  24 #include <linux/netdevice.h>
  25 #include <linux/etherdevice.h>
  26 #include <linux/ethtool.h>
  27 #include <linux/mii.h>
  28 #include <linux/usb.h>
  29 #include <linux/crc32.h>
  30 #include <linux/usb/usbnet.h>
  31 #include <linux/slab.h>
  32 #include "smsc75xx.h"
  33
  34 #define SMSC_CHIPNAME                   "smsc75xx"
  35 #define SMSC_DRIVER_VERSION             "1.0.0"
  36 #define HS_USB_PKT_SIZE                 (512)
  37 #define FS_USB_PKT_SIZE                 (64)
  38 #define DEFAULT_HS_BURST_CAP_SIZE       (16 * 1024 + 5 * HS_USB_PKT_SIZE)
  39 #define DEFAULT_FS_BURST_CAP_SIZE       (6 * 1024 + 33 * FS_USB_PKT_SIZE)
  40 #define DEFAULT_BULK_IN_DELAY           (0x00002000)
  41 #define MAX_SINGLE_PACKET_SIZE          (9000)
  42 #define LAN75XX_EEPROM_MAGIC            (0x7500)
  43 #define EEPROM_MAC_OFFSET               (0x01)
  44 #define DEFAULT_TX_CSUM_ENABLE          (true)
  45 #define DEFAULT_RX_CSUM_ENABLE          (true)
  46 #define DEFAULT_TSO_ENABLE              (true)
  47 #define SMSC75XX_INTERNAL_PHY_ID        (1)
  48 #define SMSC75XX_TX_OVERHEAD            (8)
  49 #define MAX_RX_FIFO_SIZE                (20 * 1024)
  50 #define MAX_TX_FIFO_SIZE                (12 * 1024)
  51 #define USB_VENDOR_ID_SMSC              (0x0424)
  52 #define USB_PRODUCT_ID_LAN7500          (0x7500)
  53 #define USB_PRODUCT_ID_LAN7505          (0x7505)
  54
  55 #define check_warn(ret, fmt, args...) \
  56         ({ if (ret < 0) netdev_warn(dev->net, fmt, ##args); })
  57
  58 #define check_warn_return(ret, fmt, args...) \
  59         ({ if (ret < 0) { netdev_warn(dev->net, fmt, ##args); return ret; } })
  60
  61 #define check_warn_goto_done(ret, fmt, args...) \
  62         ({ if (ret < 0) { netdev_warn(dev->net, fmt, ##args); goto done; } })
  63
  64 struct smsc75xx_priv {
  65         struct usbnet *dev;
  66         u32 rfe_ctl;
  67         u32 multicast_hash_table[DP_SEL_VHF_HASH_LEN];
  68         bool use_rx_csum;
  69         struct mutex dataport_mutex;
  70         spinlock_t rfe_ctl_lock;
  71         struct work_struct set_multicast;
  72 };
  73
  74 struct usb_context {
  75         struct usb_ctrlrequest req;
  76         struct usbnet *dev;
  77 };
  78
  79 static int turbo_mode = true;
  80 module_param(turbo_mode, bool, 0644);
  81 MODULE_PARM_DESC(turbo_mode, "Enable multiple frames per Rx transaction");
  82
  83 static int __must_check smsc75xx_read_reg(struct usbnet *dev, u32 index,
  84                                           u32 *data)
  85 {
  86         u32 *buf = kmalloc(4, GFP_KERNEL);
  87         int ret;
  88
  89         BUG_ON(!dev);
  90
  91         if (!buf)
  92                 return -ENOMEM;
  93
  94         ret = usb_control_msg(dev->udev, usb_rcvctrlpipe(dev->udev, 0),
  95                 USB_VENDOR_REQUEST_READ_REGISTER,
  96                 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
  97                 00, index, buf, 4, USB_CTRL_GET_TIMEOUT);
  98
  99         if (unlikely(ret < 0))
 100                 netdev_warn(dev->net,
 101                         "Failed to read register index 0x%08x", index);
 102
 103         le32_to_cpus(buf);
 104         *data = *buf;
 105         kfree(buf);
 106
 107         return ret;
 108 }
 109
 110 static int __must_check smsc75xx_write_reg(struct usbnet *dev, u32 index,
 111                                            u32 data)
 112 {
 113         u32 *buf = kmalloc(4, GFP_KERNEL);
 114         int ret;
 115
 116         BUG_ON(!dev);
 117
 118         if (!buf)
 119                 return -ENOMEM;
 120
 121         *buf = data;
 122         cpu_to_le32s(buf);
 123
 124         ret = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0),
 125                 USB_VENDOR_REQUEST_WRITE_REGISTER,
 126                 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 127                 00, index, buf, 4, USB_CTRL_SET_TIMEOUT);
 128
 129         if (unlikely(ret < 0))
 130                 netdev_warn(dev->net,
 131                         "Failed to write register index 0x%08x", index);
 132
 133         kfree(buf);
 134
 135         return ret;
 136 }
 137
 138 /* Loop until the read is completed with timeout
 139  * called with phy_mutex held */
 140 static int smsc75xx_phy_wait_not_busy(struct usbnet *dev)
 141 {
 142         unsigned long start_time = jiffies;
 143         u32 val;
 144         int ret;
 145
 146         do {
 147                 ret = smsc75xx_read_reg(dev, MII_ACCESS, &val);
 148                 check_warn_return(ret, "Error reading MII_ACCESS");
 149
 150                 if (!(val & MII_ACCESS_BUSY))
 151                         return 0;
 152         } while (!time_after(jiffies, start_time + HZ));
 153
 154         return -EIO;
 155 }
 156
 157 static int smsc75xx_mdio_read(struct net_device *netdev, int phy_id, int idx)
 158 {
 159         struct usbnet *dev = netdev_priv(netdev);
 160         u32 val, addr;
 161         int ret;
 162
 163         mutex_lock(&dev->phy_mutex);
 164
 165         /* confirm MII not busy */
 166         ret = smsc75xx_phy_wait_not_busy(dev);
 167         check_warn_goto_done(ret, "MII is busy in smsc75xx_mdio_read");
 168
 169         /* set the address, index & direction (read from PHY) */
 170         phy_id &= dev->mii.phy_id_mask;
 171         idx &= dev->mii.reg_num_mask;
 172         addr = ((phy_id << MII_ACCESS_PHY_ADDR_SHIFT) & MII_ACCESS_PHY_ADDR)
 173                 | ((idx << MII_ACCESS_REG_ADDR_SHIFT) & MII_ACCESS_REG_ADDR)
 174                 | MII_ACCESS_READ;
 175         ret = smsc75xx_write_reg(dev, MII_ACCESS, addr);
 176         check_warn_goto_done(ret, "Error writing MII_ACCESS");
 177
 178         ret = smsc75xx_phy_wait_not_busy(dev);
 179         check_warn_goto_done(ret, "Timed out reading MII reg %02X", idx);
 180
 181         ret = smsc75xx_read_reg(dev, MII_DATA, &val);
 182         check_warn_goto_done(ret, "Error reading MII_DATA");
 183
 184         ret = (u16)(val & 0xFFFF);
 185
 186 done:
 187         mutex_unlock(&dev->phy_mutex);
 188         return ret;
 189 }
 190
 191 static void smsc75xx_mdio_write(struct net_device *netdev, int phy_id, int idx,
 192                                 int regval)
 193 {
 194         struct usbnet *dev = netdev_priv(netdev);
 195         u32 val, addr;
 196         int ret;
 197
 198         mutex_lock(&dev->phy_mutex);
 199
 200         /* confirm MII not busy */
 201         ret = smsc75xx_phy_wait_not_busy(dev);
 202         check_warn_goto_done(ret, "MII is busy in smsc75xx_mdio_write");
 203
 204         val = regval;
 205         ret = smsc75xx_write_reg(dev, MII_DATA, val);
 206         check_warn_goto_done(ret, "Error writing MII_DATA");
 207
 208         /* set the address, index & direction (write to PHY) */
 209         phy_id &= dev->mii.phy_id_mask;
 210         idx &= dev->mii.reg_num_mask;
 211         addr = ((phy_id << MII_ACCESS_PHY_ADDR_SHIFT) & MII_ACCESS_PHY_ADDR)
 212                 | ((idx << MII_ACCESS_REG_ADDR_SHIFT) & MII_ACCESS_REG_ADDR)
 213                 | MII_ACCESS_WRITE;
 214         ret = smsc75xx_write_reg(dev, MII_ACCESS, addr);
 215         check_warn_goto_done(ret, "Error writing MII_ACCESS");
 216
 217         ret = smsc75xx_phy_wait_not_busy(dev);
 218         check_warn_goto_done(ret, "Timed out writing MII reg %02X", idx);
 219
 220 done:
 221         mutex_unlock(&dev->phy_mutex);
 222 }
 223
 224 static int smsc75xx_wait_eeprom(struct usbnet *dev)
 225 {
 226         unsigned long start_time = jiffies;
 227         u32 val;
 228         int ret;
 229
 230         do {
 231                 ret = smsc75xx_read_reg(dev, E2P_CMD, &val);
 232                 check_warn_return(ret, "Error reading E2P_CMD");
 233
 234                 if (!(val & E2P_CMD_BUSY) || (val & E2P_CMD_TIMEOUT))
 235                         break;
 236                 udelay(40);
 237         } while (!time_after(jiffies, start_time + HZ));
 238
 239         if (val & (E2P_CMD_TIMEOUT | E2P_CMD_BUSY)) {
 240                 netdev_warn(dev->net, "EEPROM read operation timeout");
 241                 return -EIO;
 242         }
 243
 244         return 0;
 245 }
 246
 247 static int smsc75xx_eeprom_confirm_not_busy(struct usbnet *dev)
 248 {
 249         unsigned long start_time = jiffies;
 250         u32 val;
 251         int ret;
 252
 253         do {
 254                 ret = smsc75xx_read_reg(dev, E2P_CMD, &val);
 255                 check_warn_return(ret, "Error reading E2P_CMD");
 256
 257                 if (!(val & E2P_CMD_BUSY))
 258                         return 0;
 259
 260                 udelay(40);
 261         } while (!time_after(jiffies, start_time + HZ));
 262
 263         netdev_warn(dev->net, "EEPROM is busy");
 264         return -EIO;
 265 }
 266
 267 static int smsc75xx_read_eeprom(struct usbnet *dev, u32 offset, u32 length,
 268                                 u8 *data)
 269 {
 270         u32 val;
 271         int i, ret;
 272
 273         BUG_ON(!dev);
 274         BUG_ON(!data);
 275
 276         ret = smsc75xx_eeprom_confirm_not_busy(dev);
 277         if (ret)
 278                 return ret;
 279
 280         for (i = 0; i < length; i++) {
 281                 val = E2P_CMD_BUSY | E2P_CMD_READ | (offset & E2P_CMD_ADDR);
 282                 ret = smsc75xx_write_reg(dev, E2P_CMD, val);
 283                 check_warn_return(ret, "Error writing E2P_CMD");
 284
 285                 ret = smsc75xx_wait_eeprom(dev);
 286                 if (ret < 0)
 287                         return ret;
 288
 289                 ret = smsc75xx_read_reg(dev, E2P_DATA, &val);
 290                 check_warn_return(ret, "Error reading E2P_DATA");
 291
 292                 data[i] = val & 0xFF;
 293                 offset++;
 294         }
 295
 296         return 0;
 297 }
 298
 299 static int smsc75xx_write_eeprom(struct usbnet *dev, u32 offset, u32 length,
 300                                  u8 *data)
 301 {
 302         u32 val;
 303         int i, ret;
 304
 305         BUG_ON(!dev);
 306         BUG_ON(!data);
 307
 308         ret = smsc75xx_eeprom_confirm_not_busy(dev);
 309         if (ret)
 310                 return ret;
 311
 312         /* Issue write/erase enable command */
 313         val = E2P_CMD_BUSY | E2P_CMD_EWEN;
 314         ret = smsc75xx_write_reg(dev, E2P_CMD, val);
 315         check_warn_return(ret, "Error writing E2P_CMD");
 316
 317         ret = smsc75xx_wait_eeprom(dev);
 318         if (ret < 0)
 319                 return ret;
 320
 321         for (i = 0; i < length; i++) {
 322
 323                 /* Fill data register */
 324                 val = data[i];
 325                 ret = smsc75xx_write_reg(dev, E2P_DATA, val);
 326                 check_warn_return(ret, "Error writing E2P_DATA");
 327
 328                 /* Send "write" command */
 329                 val = E2P_CMD_BUSY | E2P_CMD_WRITE | (offset & E2P_CMD_ADDR);
 330                 ret = smsc75xx_write_reg(dev, E2P_CMD, val);
 331                 check_warn_return(ret, "Error writing E2P_CMD");
 332
 333                 ret = smsc75xx_wait_eeprom(dev);
 334                 if (ret < 0)
 335                         return ret;
 336
 337                 offset++;
 338         }
 339
 340         return 0;
 341 }
 342
 343 static int smsc75xx_dataport_wait_not_busy(struct usbnet *dev)
 344 {
 345         int i, ret;
 346
 347         for (i = 0; i < 100; i++) {
 348                 u32 dp_sel;
 349                 ret = smsc75xx_read_reg(dev, DP_SEL, &dp_sel);
 350                 check_warn_return(ret, "Error reading DP_SEL");
 351
 352                 if (dp_sel & DP_SEL_DPRDY)
 353                         return 0;
 354
 355                 udelay(40);
 356         }
 357
 358         netdev_warn(dev->net, "smsc75xx_dataport_wait_not_busy timed out");
 359
 360         return -EIO;
 361 }
 362
 363 static int smsc75xx_dataport_write(struct usbnet *dev, u32 ram_select, u32 addr,
 364                                    u32 length, u32 *buf)
 365 {
 366         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 367         u32 dp_sel;
 368         int i, ret;
 369
 370         mutex_lock(&pdata->dataport_mutex);
 371
 372         ret = smsc75xx_dataport_wait_not_busy(dev);
 373         check_warn_goto_done(ret, "smsc75xx_dataport_write busy on entry");
 374
 375         ret = smsc75xx_read_reg(dev, DP_SEL, &dp_sel);
 376         check_warn_goto_done(ret, "Error reading DP_SEL");
 377
 378         dp_sel &= ~DP_SEL_RSEL;
 379         dp_sel |= ram_select;
 380         ret = smsc75xx_write_reg(dev, DP_SEL, dp_sel);
 381         check_warn_goto_done(ret, "Error writing DP_SEL");
 382
 383         for (i = 0; i < length; i++) {
 384                 ret = smsc75xx_write_reg(dev, DP_ADDR, addr + i);
 385                 check_warn_goto_done(ret, "Error writing DP_ADDR");
 386
 387                 ret = smsc75xx_write_reg(dev, DP_DATA, buf[i]);
 388                 check_warn_goto_done(ret, "Error writing DP_DATA");
 389
 390                 ret = smsc75xx_write_reg(dev, DP_CMD, DP_CMD_WRITE);
 391                 check_warn_goto_done(ret, "Error writing DP_CMD");
 392
 393                 ret = smsc75xx_dataport_wait_not_busy(dev);
 394                 check_warn_goto_done(ret, "smsc75xx_dataport_write timeout");
 395         }
 396
 397 done:
 398         mutex_unlock(&pdata->dataport_mutex);
 399         return ret;
 400 }
 401
 402 /* returns hash bit number for given MAC address */
 403 static u32 smsc75xx_hash(char addr[ETH_ALEN])
 404 {
 405         return (ether_crc(ETH_ALEN, addr) >> 23) & 0x1ff;
 406 }
 407
 408 static void smsc75xx_deferred_multicast_write(struct work_struct *param)
 409 {
 410         struct smsc75xx_priv *pdata =
 411                 container_of(param, struct smsc75xx_priv, set_multicast);
 412         struct usbnet *dev = pdata->dev;
 413         int ret;
 414
 415         netif_dbg(dev, drv, dev->net, "deferred multicast write 0x%08x",
 416                 pdata->rfe_ctl);
 417
 418         smsc75xx_dataport_write(dev, DP_SEL_VHF, DP_SEL_VHF_VLAN_LEN,
 419                 DP_SEL_VHF_HASH_LEN, pdata->multicast_hash_table);
 420
 421         ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
 422         check_warn(ret, "Error writing RFE_CRL");
 423 }
 424
 425 static void smsc75xx_set_multicast(struct net_device *netdev)
 426 {
 427         struct usbnet *dev = netdev_priv(netdev);
 428         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 429         unsigned long flags;
 430         int i;
 431
 432         spin_lock_irqsave(&pdata->rfe_ctl_lock, flags);
 433
 434         pdata->rfe_ctl &=
 435                 ~(RFE_CTL_AU | RFE_CTL_AM | RFE_CTL_DPF | RFE_CTL_MHF);
 436         pdata->rfe_ctl |= RFE_CTL_AB;
 437
 438         for (i = 0; i < DP_SEL_VHF_HASH_LEN; i++)
 439                 pdata->multicast_hash_table[i] = 0;
 440
 441         if (dev->net->flags & IFF_PROMISC) {
 442                 netif_dbg(dev, drv, dev->net, "promiscuous mode enabled");
 443                 pdata->rfe_ctl |= RFE_CTL_AM | RFE_CTL_AU;
 444         } else if (dev->net->flags & IFF_ALLMULTI) {
 445                 netif_dbg(dev, drv, dev->net, "receive all multicast enabled");
 446                 pdata->rfe_ctl |= RFE_CTL_AM | RFE_CTL_DPF;
 447         } else if (!netdev_mc_empty(dev->net)) {
 448                 struct dev_mc_list *mc_list;
 449
 450                 netif_dbg(dev, drv, dev->net, "receive multicast hash filter");
 451
 452                 pdata->rfe_ctl |= RFE_CTL_MHF | RFE_CTL_DPF;
 453
 454                 netdev_for_each_mc_addr(mc_list, netdev) {
 455                         u32 bitnum = smsc75xx_hash(mc_list->dmi_addr);
 456                         pdata->multicast_hash_table[bitnum / 32] |=
 457                                 (1 << (bitnum % 32));
 458                 }
 459         } else {
 460                 netif_dbg(dev, drv, dev->net, "receive own packets only");
 461                 pdata->rfe_ctl |= RFE_CTL_DPF;
 462         }
 463
 464         spin_unlock_irqrestore(&pdata->rfe_ctl_lock, flags);
 465
 466         /* defer register writes to a sleepable context */
 467         schedule_work(&pdata->set_multicast);
 468 }
 469
 470 static int smsc75xx_update_flowcontrol(struct usbnet *dev, u8 duplex,
 471                                             u16 lcladv, u16 rmtadv)
 472 {
 473         u32 flow = 0, fct_flow = 0;
 474         int ret;
 475
 476         if (duplex == DUPLEX_FULL) {
 477                 u8 cap = mii_resolve_flowctrl_fdx(lcladv, rmtadv);
 478
 479                 if (cap & FLOW_CTRL_TX) {
 480                         flow = (FLOW_TX_FCEN | 0xFFFF);
 481                         /* set fct_flow thresholds to 20% and 80% */
 482                         fct_flow = (8 << 8) | 32;
 483                 }
 484
 485                 if (cap & FLOW_CTRL_RX)
 486                         flow |= FLOW_RX_FCEN;
 487
 488                 netif_dbg(dev, link, dev->net, "rx pause %s, tx pause %s",
 489                         (cap & FLOW_CTRL_RX ? "enabled" : "disabled"),
 490                         (cap & FLOW_CTRL_TX ? "enabled" : "disabled"));
 491         } else {
 492                 netif_dbg(dev, link, dev->net, "half duplex");
 493         }
 494
 495         ret = smsc75xx_write_reg(dev, FLOW, flow);
 496         check_warn_return(ret, "Error writing FLOW");
 497
 498         ret = smsc75xx_write_reg(dev, FCT_FLOW, fct_flow);
 499         check_warn_return(ret, "Error writing FCT_FLOW");
 500
 501         return 0;
 502 }
 503
 504 static int smsc75xx_link_reset(struct usbnet *dev)
 505 {
 506         struct mii_if_info *mii = &dev->mii;
 507         struct ethtool_cmd ecmd;
 508         u16 lcladv, rmtadv;
 509         int ret;
 510
 511         /* clear interrupt status */
 512         ret = smsc75xx_mdio_read(dev->net, mii->phy_id, PHY_INT_SRC);
 513         check_warn_return(ret, "Error reading PHY_INT_SRC");
 514
 515         ret = smsc75xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL);
 516         check_warn_return(ret, "Error writing INT_STS");
 517
 518         mii_check_media(mii, 1, 1);
 519         mii_ethtool_gset(&dev->mii, &ecmd);
 520         lcladv = smsc75xx_mdio_read(dev->net, mii->phy_id, MII_ADVERTISE);
 521         rmtadv = smsc75xx_mdio_read(dev->net, mii->phy_id, MII_LPA);
 522
 523         netif_dbg(dev, link, dev->net, "speed: %d duplex: %d lcladv: %04x"
 524                 " rmtadv: %04x", ecmd.speed, ecmd.duplex, lcladv, rmtadv);
 525
 526         return smsc75xx_update_flowcontrol(dev, ecmd.duplex, lcladv, rmtadv);
 527 }
 528
 529 static void smsc75xx_status(struct usbnet *dev, struct urb *urb)
 530 {
 531         u32 intdata;
 532
 533         if (urb->actual_length != 4) {
 534                 netdev_warn(dev->net,
 535                         "unexpected urb length %d", urb->actual_length);
 536                 return;
 537         }
 538
 539         memcpy(&intdata, urb->transfer_buffer, 4);
 540         le32_to_cpus(&intdata);
 541
 542         netif_dbg(dev, link, dev->net, "intdata: 0x%08X", intdata);
 543
 544         if (intdata & INT_ENP_PHY_INT)
 545                 usbnet_defer_kevent(dev, EVENT_LINK_RESET);
 546         else
 547                 netdev_warn(dev->net,
 548                         "unexpected interrupt, intdata=0x%08X", intdata);
 549 }
 550
 551 /* Enable or disable Rx checksum offload engine */
 552 static int smsc75xx_set_rx_csum_offload(struct usbnet *dev)
 553 {
 554         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 555         unsigned long flags;
 556         int ret;
 557
 558         spin_lock_irqsave(&pdata->rfe_ctl_lock, flags);
 559
 560         if (pdata->use_rx_csum)
 561                 pdata->rfe_ctl |= RFE_CTL_TCPUDP_CKM | RFE_CTL_IP_CKM;
 562         else
 563                 pdata->rfe_ctl &= ~(RFE_CTL_TCPUDP_CKM | RFE_CTL_IP_CKM);
 564
 565         spin_unlock_irqrestore(&pdata->rfe_ctl_lock, flags);
 566
 567         ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
 568         check_warn_return(ret, "Error writing RFE_CTL");
 569
 570         return 0;
 571 }
 572
 573 static int smsc75xx_ethtool_get_eeprom_len(struct net_device *net)
 574 {
 575         return MAX_EEPROM_SIZE;
 576 }
 577
 578 static int smsc75xx_ethtool_get_eeprom(struct net_device *netdev,
 579                                        struct ethtool_eeprom *ee, u8 *data)
 580 {
 581         struct usbnet *dev = netdev_priv(netdev);
 582
 583         ee->magic = LAN75XX_EEPROM_MAGIC;
 584
 585         return smsc75xx_read_eeprom(dev, ee->offset, ee->len, data);
 586 }
 587
 588 static int smsc75xx_ethtool_set_eeprom(struct net_device *netdev,
 589                                        struct ethtool_eeprom *ee, u8 *data)
 590 {
 591         struct usbnet *dev = netdev_priv(netdev);
 592
 593         if (ee->magic != LAN75XX_EEPROM_MAGIC) {
 594                 netdev_warn(dev->net,
 595                         "EEPROM: magic value mismatch: 0x%x", ee->magic);
 596                 return -EINVAL;
 597         }
 598
 599         return smsc75xx_write_eeprom(dev, ee->offset, ee->len, data);
 600 }
 601
 602 static u32 smsc75xx_ethtool_get_rx_csum(struct net_device *netdev)
 603 {
 604         struct usbnet *dev = netdev_priv(netdev);
 605         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 606
 607         return pdata->use_rx_csum;
 608 }
 609
 610 static int smsc75xx_ethtool_set_rx_csum(struct net_device *netdev, u32 val)
 611 {
 612         struct usbnet *dev = netdev_priv(netdev);
 613         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 614
 615         pdata->use_rx_csum = !!val;
 616
 617         return smsc75xx_set_rx_csum_offload(dev);
 618 }
 619
 620 static int smsc75xx_ethtool_set_tso(struct net_device *netdev, u32 data)
 621 {
 622         if (data)
 623                 netdev->features |= NETIF_F_TSO | NETIF_F_TSO6;
 624         else
 625                 netdev->features &= ~(NETIF_F_TSO | NETIF_F_TSO6);
 626
 627         return 0;
 628 }
 629
 630 static const struct ethtool_ops smsc75xx_ethtool_ops = {
 631         .get_link       = usbnet_get_link,
 632         .nway_reset     = usbnet_nway_reset,
 633         .get_drvinfo    = usbnet_get_drvinfo,
 634         .get_msglevel   = usbnet_get_msglevel,
 635         .set_msglevel   = usbnet_set_msglevel,
 636         .get_settings   = usbnet_get_settings,
 637         .set_settings   = usbnet_set_settings,
 638         .get_eeprom_len = smsc75xx_ethtool_get_eeprom_len,
 639         .get_eeprom     = smsc75xx_ethtool_get_eeprom,
 640         .set_eeprom     = smsc75xx_ethtool_set_eeprom,
 641         .get_tx_csum    = ethtool_op_get_tx_csum,
 642         .set_tx_csum    = ethtool_op_set_tx_hw_csum,
 643         .get_rx_csum    = smsc75xx_ethtool_get_rx_csum,
 644         .set_rx_csum    = smsc75xx_ethtool_set_rx_csum,
 645         .get_tso        = ethtool_op_get_tso,
 646         .set_tso        = smsc75xx_ethtool_set_tso,
 647 };
 648
 649 static int smsc75xx_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
 650 {
 651         struct usbnet *dev = netdev_priv(netdev);
 652
 653         if (!netif_running(netdev))
 654                 return -EINVAL;
 655
 656         return generic_mii_ioctl(&dev->mii, if_mii(rq), cmd, NULL);
 657 }
 658
 659 static void smsc75xx_init_mac_address(struct usbnet *dev)
 660 {
 661         /* try reading mac address from EEPROM */
 662         if (smsc75xx_read_eeprom(dev, EEPROM_MAC_OFFSET, ETH_ALEN,
 663                         dev->net->dev_addr) == 0) {
 664                 if (is_valid_ether_addr(dev->net->dev_addr)) {
 665                         /* eeprom values are valid so use them */
 666                         netif_dbg(dev, ifup, dev->net,
 667                                 "MAC address read from EEPROM");
 668                         return;
 669                 }
 670         }
 671
 672         /* no eeprom, or eeprom values are invalid. generate random MAC */
 673         random_ether_addr(dev->net->dev_addr);
 674         netif_dbg(dev, ifup, dev->net, "MAC address set to random_ether_addr");
 675 }
 676
 677 static int smsc75xx_set_mac_address(struct usbnet *dev)
 678 {
 679         u32 addr_lo = dev->net->dev_addr[0] | dev->net->dev_addr[1] << 8 |
 680                 dev->net->dev_addr[2] << 16 | dev->net->dev_addr[3] << 24;
 681         u32 addr_hi = dev->net->dev_addr[4] | dev->net->dev_addr[5] << 8;
 682
 683         int ret = smsc75xx_write_reg(dev, RX_ADDRH, addr_hi);
 684         check_warn_return(ret, "Failed to write RX_ADDRH: %d", ret);
 685
 686         ret = smsc75xx_write_reg(dev, RX_ADDRL, addr_lo);
 687         check_warn_return(ret, "Failed to write RX_ADDRL: %d", ret);
 688
 689         addr_hi |= ADDR_FILTX_FB_VALID;
 690         ret = smsc75xx_write_reg(dev, ADDR_FILTX, addr_hi);
 691         check_warn_return(ret, "Failed to write ADDR_FILTX: %d", ret);
 692
 693         ret = smsc75xx_write_reg(dev, ADDR_FILTX + 4, addr_lo);
 694         check_warn_return(ret, "Failed to write ADDR_FILTX+4: %d", ret);
 695
 696         return 0;
 697 }
 698
 699 static int smsc75xx_phy_initialize(struct usbnet *dev)
 700 {
 701         int bmcr, timeout = 0;
 702
 703         /* Initialize MII structure */
 704         dev->mii.dev = dev->net;
 705         dev->mii.mdio_read = smsc75xx_mdio_read;
 706         dev->mii.mdio_write = smsc75xx_mdio_write;
 707         dev->mii.phy_id_mask = 0x1f;
 708         dev->mii.reg_num_mask = 0x1f;
 709         dev->mii.phy_id = SMSC75XX_INTERNAL_PHY_ID;
 710
 711         /* reset phy and wait for reset to complete */
 712         smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_BMCR, BMCR_RESET);
 713
 714         do {
 715                 msleep(10);
 716                 bmcr = smsc75xx_mdio_read(dev->net, dev->mii.phy_id, MII_BMCR);
 717                 check_warn_return(bmcr, "Error reading MII_BMCR");
 718                 timeout++;
 719         } while ((bmcr & MII_BMCR) && (timeout < 100));
 720
 721         if (timeout >= 100) {
 722                 netdev_warn(dev->net, "timeout on PHY Reset");
 723                 return -EIO;
 724         }
 725
 726         smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_ADVERTISE,
 727                 ADVERTISE_ALL | ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP |
 728                 ADVERTISE_PAUSE_ASYM);
 729
 730         /* read to clear */
 731         smsc75xx_mdio_read(dev->net, dev->mii.phy_id, PHY_INT_SRC);
 732         check_warn_return(bmcr, "Error reading PHY_INT_SRC");
 733
 734         smsc75xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_MASK,
 735                 PHY_INT_MASK_DEFAULT);
 736         mii_nway_restart(&dev->mii);
 737
 738         netif_dbg(dev, ifup, dev->net, "phy initialised successfully");
 739         return 0;
 740 }
 741
 742 static int smsc75xx_set_rx_max_frame_length(struct usbnet *dev, int size)
 743 {
 744         int ret = 0;
 745         u32 buf;
 746         bool rxenabled;
 747
 748         ret = smsc75xx_read_reg(dev, MAC_RX, &buf);
 749         check_warn_return(ret, "Failed to read MAC_RX: %d", ret);
 750
 751         rxenabled = ((buf & MAC_RX_RXEN) != 0);
 752
 753         if (rxenabled) {
 754                 buf &= ~MAC_RX_RXEN;
 755                 ret = smsc75xx_write_reg(dev, MAC_RX, buf);
 756                 check_warn_return(ret, "Failed to write MAC_RX: %d", ret);
 757         }
 758
 759         /* add 4 to size for FCS */
 760         buf &= ~MAC_RX_MAX_SIZE;
 761         buf |= (((size + 4) << MAC_RX_MAX_SIZE_SHIFT) & MAC_RX_MAX_SIZE);
 762
 763         ret = smsc75xx_write_reg(dev, MAC_RX, buf);
 764         check_warn_return(ret, "Failed to write MAC_RX: %d", ret);
 765
 766         if (rxenabled) {
 767                 buf |= MAC_RX_RXEN;
 768                 ret = smsc75xx_write_reg(dev, MAC_RX, buf);
 769                 check_warn_return(ret, "Failed to write MAC_RX: %d", ret);
 770         }
 771
 772         return 0;
 773 }
 774
 775 static int smsc75xx_change_mtu(struct net_device *netdev, int new_mtu)
 776 {
 777         struct usbnet *dev = netdev_priv(netdev);
 778
 779         int ret = smsc75xx_set_rx_max_frame_length(dev, new_mtu);
 780         check_warn_return(ret, "Failed to set mac rx frame length");
 781
 782         return usbnet_change_mtu(netdev, new_mtu);
 783 }
 784
 785 static int smsc75xx_reset(struct usbnet *dev)
 786 {
 787         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 788         u32 buf;
 789         int ret = 0, timeout;
 790
 791         netif_dbg(dev, ifup, dev->net, "entering smsc75xx_reset");
 792
 793         ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
 794         check_warn_return(ret, "Failed to read HW_CFG: %d", ret);
 795
 796         buf |= HW_CFG_LRST;
 797
 798         ret = smsc75xx_write_reg(dev, HW_CFG, buf);
 799         check_warn_return(ret, "Failed to write HW_CFG: %d", ret);
 800
 801         timeout = 0;
 802         do {
 803                 msleep(10);
 804                 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
 805                 check_warn_return(ret, "Failed to read HW_CFG: %d", ret);
 806                 timeout++;
 807         } while ((buf & HW_CFG_LRST) && (timeout < 100));
 808
 809         if (timeout >= 100) {
 810                 netdev_warn(dev->net, "timeout on completion of Lite Reset");
 811                 return -EIO;
 812         }
 813
 814         netif_dbg(dev, ifup, dev->net, "Lite reset complete, resetting PHY");
 815
 816         ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
 817         check_warn_return(ret, "Failed to read PMT_CTL: %d", ret);
 818
 819         buf |= PMT_CTL_PHY_RST;
 820
 821         ret = smsc75xx_write_reg(dev, PMT_CTL, buf);
 822         check_warn_return(ret, "Failed to write PMT_CTL: %d", ret);
 823
 824         timeout = 0;
 825         do {
 826                 msleep(10);
 827                 ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
 828                 check_warn_return(ret, "Failed to read PMT_CTL: %d", ret);
 829                 timeout++;
 830         } while ((buf & PMT_CTL_PHY_RST) && (timeout < 100));
 831
 832         if (timeout >= 100) {
 833                 netdev_warn(dev->net, "timeout waiting for PHY Reset");
 834                 return -EIO;
 835         }
 836
 837         netif_dbg(dev, ifup, dev->net, "PHY reset complete");
 838
 839         smsc75xx_init_mac_address(dev);
 840
 841         ret = smsc75xx_set_mac_address(dev);
 842         check_warn_return(ret, "Failed to set mac address");
 843
 844         netif_dbg(dev, ifup, dev->net, "MAC Address: %pM", dev->net->dev_addr);
 845
 846         ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
 847         check_warn_return(ret, "Failed to read HW_CFG: %d", ret);
 848
 849         netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG : 0x%08x", buf);
 850
 851         buf |= HW_CFG_BIR;
 852
 853         ret = smsc75xx_write_reg(dev, HW_CFG, buf);
 854         check_warn_return(ret, "Failed to write HW_CFG: %d", ret);
 855
 856         ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
 857         check_warn_return(ret, "Failed to read HW_CFG: %d", ret);
 858
 859         netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG after "
 860                         "writing HW_CFG_BIR: 0x%08x", buf);
 861
 862         if (!turbo_mode) {
 863                 buf = 0;
 864                 dev->rx_urb_size = MAX_SINGLE_PACKET_SIZE;
 865         } else if (dev->udev->speed == USB_SPEED_HIGH) {
 866                 buf = DEFAULT_HS_BURST_CAP_SIZE / HS_USB_PKT_SIZE;
 867                 dev->rx_urb_size = DEFAULT_HS_BURST_CAP_SIZE;
 868         } else {
 869                 buf = DEFAULT_FS_BURST_CAP_SIZE / FS_USB_PKT_SIZE;
 870                 dev->rx_urb_size = DEFAULT_FS_BURST_CAP_SIZE;
 871         }
 872
 873         netif_dbg(dev, ifup, dev->net, "rx_urb_size=%ld",
 874                 (ulong)dev->rx_urb_size);
 875
 876         ret = smsc75xx_write_reg(dev, BURST_CAP, buf);
 877         check_warn_return(ret, "Failed to write BURST_CAP: %d", ret);
 878
 879         ret = smsc75xx_read_reg(dev, BURST_CAP, &buf);
 880         check_warn_return(ret, "Failed to read BURST_CAP: %d", ret);
 881
 882         netif_dbg(dev, ifup, dev->net,
 883                 "Read Value from BURST_CAP after writing: 0x%08x", buf);
 884
 885         ret = smsc75xx_write_reg(dev, BULK_IN_DLY, DEFAULT_BULK_IN_DELAY);
 886         check_warn_return(ret, "Failed to write BULK_IN_DLY: %d", ret);
 887
 888         ret = smsc75xx_read_reg(dev, BULK_IN_DLY, &buf);
 889         check_warn_return(ret, "Failed to read BULK_IN_DLY: %d", ret);
 890
 891         netif_dbg(dev, ifup, dev->net,
 892                 "Read Value from BULK_IN_DLY after writing: 0x%08x", buf);
 893
 894         if (turbo_mode) {
 895                 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
 896                 check_warn_return(ret, "Failed to read HW_CFG: %d", ret);
 897
 898                 netif_dbg(dev, ifup, dev->net, "HW_CFG: 0x%08x", buf);
 899
 900                 buf |= (HW_CFG_MEF | HW_CFG_BCE);
 901
 902                 ret = smsc75xx_write_reg(dev, HW_CFG, buf);
 903                 check_warn_return(ret, "Failed to write HW_CFG: %d", ret);
 904
 905                 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
 906                 check_warn_return(ret, "Failed to read HW_CFG: %d", ret);
 907
 908                 netif_dbg(dev, ifup, dev->net, "HW_CFG: 0x%08x", buf);
 909         }
 910
 911         /* set FIFO sizes */
 912         buf = (MAX_RX_FIFO_SIZE - 512) / 512;
 913         ret = smsc75xx_write_reg(dev, FCT_RX_FIFO_END, buf);
 914         check_warn_return(ret, "Failed to write FCT_RX_FIFO_END: %d", ret);
 915
 916         netif_dbg(dev, ifup, dev->net, "FCT_RX_FIFO_END set to 0x%08x", buf);
 917
 918         buf = (MAX_TX_FIFO_SIZE - 512) / 512;
 919         ret = smsc75xx_write_reg(dev, FCT_TX_FIFO_END, buf);
 920         check_warn_return(ret, "Failed to write FCT_TX_FIFO_END: %d", ret);
 921
 922         netif_dbg(dev, ifup, dev->net, "FCT_TX_FIFO_END set to 0x%08x", buf);
 923
 924         ret = smsc75xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL);
 925         check_warn_return(ret, "Failed to write INT_STS: %d", ret);
 926
 927         ret = smsc75xx_read_reg(dev, ID_REV, &buf);
 928         check_warn_return(ret, "Failed to read ID_REV: %d", ret);
 929
 930         netif_dbg(dev, ifup, dev->net, "ID_REV = 0x%08x", buf);
 931
 932         /* Configure GPIO pins as LED outputs */
 933         ret = smsc75xx_read_reg(dev, LED_GPIO_CFG, &buf);
 934         check_warn_return(ret, "Failed to read LED_GPIO_CFG: %d", ret);
 935
 936         buf &= ~(LED_GPIO_CFG_LED2_FUN_SEL | LED_GPIO_CFG_LED10_FUN_SEL);
 937         buf |= LED_GPIO_CFG_LEDGPIO_EN | LED_GPIO_CFG_LED2_FUN_SEL;
 938
 939         ret = smsc75xx_write_reg(dev, LED_GPIO_CFG, buf);
 940         check_warn_return(ret, "Failed to write LED_GPIO_CFG: %d", ret);
 941
 942         ret = smsc75xx_write_reg(dev, FLOW, 0);
 943         check_warn_return(ret, "Failed to write FLOW: %d", ret);
 944
 945         ret = smsc75xx_write_reg(dev, FCT_FLOW, 0);
 946         check_warn_return(ret, "Failed to write FCT_FLOW: %d", ret);
 947
 948         /* Don't need rfe_ctl_lock during initialisation */
 949         ret = smsc75xx_read_reg(dev, RFE_CTL, &pdata->rfe_ctl);
 950         check_warn_return(ret, "Failed to read RFE_CTL: %d", ret);
 951
 952         pdata->rfe_ctl |= RFE_CTL_AB | RFE_CTL_DPF;
 953
 954         ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
 955         check_warn_return(ret, "Failed to write RFE_CTL: %d", ret);
 956
 957         ret = smsc75xx_read_reg(dev, RFE_CTL, &pdata->rfe_ctl);
 958         check_warn_return(ret, "Failed to read RFE_CTL: %d", ret);
 959
 960         netif_dbg(dev, ifup, dev->net, "RFE_CTL set to 0x%08x", pdata->rfe_ctl);
 961
 962         /* Enable or disable checksum offload engines */
 963         ethtool_op_set_tx_hw_csum(dev->net, DEFAULT_TX_CSUM_ENABLE);
 964         ret = smsc75xx_set_rx_csum_offload(dev);
 965         check_warn_return(ret, "Failed to set rx csum offload: %d", ret);
 966
 967         smsc75xx_ethtool_set_tso(dev->net, DEFAULT_TSO_ENABLE);
 968
 969         smsc75xx_set_multicast(dev->net);
 970
 971         ret = smsc75xx_phy_initialize(dev);
 972         check_warn_return(ret, "Failed to initialize PHY: %d", ret);
 973
 974         ret = smsc75xx_read_reg(dev, INT_EP_CTL, &buf);
 975         check_warn_return(ret, "Failed to read INT_EP_CTL: %d", ret);
 976
 977         /* enable PHY interrupts */
 978         buf |= INT_ENP_PHY_INT;
 979
 980         ret = smsc75xx_write_reg(dev, INT_EP_CTL, buf);
 981         check_warn_return(ret, "Failed to write INT_EP_CTL: %d", ret);
 982
 983         ret = smsc75xx_read_reg(dev, MAC_TX, &buf);
 984         check_warn_return(ret, "Failed to read MAC_TX: %d", ret);
 985
 986         buf |= MAC_TX_TXEN;
 987
 988         ret = smsc75xx_write_reg(dev, MAC_TX, buf);
 989         check_warn_return(ret, "Failed to write MAC_TX: %d", ret);
 990
 991         netif_dbg(dev, ifup, dev->net, "MAC_TX set to 0x%08x", buf);
 992
 993         ret = smsc75xx_read_reg(dev, FCT_TX_CTL, &buf);
 994         check_warn_return(ret, "Failed to read FCT_TX_CTL: %d", ret);
 995
 996         buf |= FCT_TX_CTL_EN;
 997
 998         ret = smsc75xx_write_reg(dev, FCT_TX_CTL, buf);
 999         check_warn_return(ret, "Failed to write FCT_TX_CTL: %d", ret);
1000
1001         netif_dbg(dev, ifup, dev->net, "FCT_TX_CTL set to 0x%08x", buf);
1002
1003         ret = smsc75xx_set_rx_max_frame_length(dev, 1514);
1004         check_warn_return(ret, "Failed to set max rx frame length");
1005
1006         ret = smsc75xx_read_reg(dev, MAC_RX, &buf);
1007         check_warn_return(ret, "Failed to read MAC_RX: %d", ret);
1008
1009         buf |= MAC_RX_RXEN;
1010
1011         ret = smsc75xx_write_reg(dev, MAC_RX, buf);
1012         check_warn_return(ret, "Failed to write MAC_RX: %d", ret);
1013
1014         netif_dbg(dev, ifup, dev->net, "MAC_RX set to 0x%08x", buf);
1015
1016         ret = smsc75xx_read_reg(dev, FCT_RX_CTL, &buf);
1017         check_warn_return(ret, "Failed to read FCT_RX_CTL: %d", ret);
1018
1019         buf |= FCT_RX_CTL_EN;
1020
1021         ret = smsc75xx_write_reg(dev, FCT_RX_CTL, buf);
1022         check_warn_return(ret, "Failed to write FCT_RX_CTL: %d", ret);
1023
1024         netif_dbg(dev, ifup, dev->net, "FCT_RX_CTL set to 0x%08x", buf);
1025
1026         netif_dbg(dev, ifup, dev->net, "smsc75xx_reset, return 0");
1027         return 0;
1028 }
1029
1030 static const struct net_device_ops smsc75xx_netdev_ops = {
1031         .ndo_open               = usbnet_open,
1032         .ndo_stop               = usbnet_stop,
1033         .ndo_start_xmit         = usbnet_start_xmit,
1034         .ndo_tx_timeout         = usbnet_tx_timeout,
1035         .ndo_change_mtu         = smsc75xx_change_mtu,
1036         .ndo_set_mac_address    = eth_mac_addr,
1037         .ndo_validate_addr      = eth_validate_addr,
1038         .ndo_do_ioctl           = smsc75xx_ioctl,
1039         .ndo_set_multicast_list = smsc75xx_set_multicast,
1040 };
1041
1042 static int smsc75xx_bind(struct usbnet *dev, struct usb_interface *intf)
1043 {
1044         struct smsc75xx_priv *pdata = NULL;
1045         int ret;
1046
1047         printk(KERN_INFO SMSC_CHIPNAME " v" SMSC_DRIVER_VERSION "\n");
1048
1049         ret = usbnet_get_endpoints(dev, intf);
1050         check_warn_return(ret, "usbnet_get_endpoints failed: %d", ret);
1051
1052         dev->data[0] = (unsigned long)kzalloc(sizeof(struct smsc75xx_priv),
1053                 GFP_KERNEL);
1054
1055         pdata = (struct smsc75xx_priv *)(dev->data[0]);
1056         if (!pdata) {
1057                 netdev_warn(dev->net, "Unable to allocate smsc75xx_priv");
1058                 return -ENOMEM;
1059         }
1060
1061         pdata->dev = dev;
1062
1063         spin_lock_init(&pdata->rfe_ctl_lock);
1064         mutex_init(&pdata->dataport_mutex);
1065
1066         INIT_WORK(&pdata->set_multicast, smsc75xx_deferred_multicast_write);
1067
1068         pdata->use_rx_csum = DEFAULT_RX_CSUM_ENABLE;
1069
1070         /* We have to advertise SG otherwise TSO cannot be enabled */
1071         dev->net->features |= NETIF_F_SG;
1072
1073         /* Init all registers */
1074         ret = smsc75xx_reset(dev);
1075
1076         dev->net->netdev_ops = &smsc75xx_netdev_ops;
1077         dev->net->ethtool_ops = &smsc75xx_ethtool_ops;
1078         dev->net->flags |= IFF_MULTICAST;
1079         dev->net->hard_header_len += SMSC75XX_TX_OVERHEAD;
1080         return 0;
1081 }
1082
1083 static void smsc75xx_unbind(struct usbnet *dev, struct usb_interface *intf)
1084 {
1085         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1086         if (pdata) {
1087                 netif_dbg(dev, ifdown, dev->net, "free pdata");
1088                 kfree(pdata);
1089                 pdata = NULL;
1090                 dev->data[0] = 0;
1091         }
1092 }
1093
1094 static void smsc75xx_rx_csum_offload(struct sk_buff *skb, u32 rx_cmd_a,
1095                                      u32 rx_cmd_b)
1096 {
1097         if (unlikely(rx_cmd_a & RX_CMD_A_LCSM)) {
1098                 skb->ip_summed = CHECKSUM_NONE;
1099         } else {
1100                 skb->csum = ntohs((u16)(rx_cmd_b >> RX_CMD_B_CSUM_SHIFT));
1101                 skb->ip_summed = CHECKSUM_COMPLETE;
1102         }
1103 }
1104
1105 static int smsc75xx_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
1106 {
1107         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1108
1109         while (skb->len > 0) {
1110                 u32 rx_cmd_a, rx_cmd_b, align_count, size;
1111                 struct sk_buff *ax_skb;
1112                 unsigned char *packet;
1113
1114                 memcpy(&rx_cmd_a, skb->data, sizeof(rx_cmd_a));
1115                 le32_to_cpus(&rx_cmd_a);
1116                 skb_pull(skb, 4);
1117
1118                 memcpy(&rx_cmd_b, skb->data, sizeof(rx_cmd_b));
1119                 le32_to_cpus(&rx_cmd_b);
1120                 skb_pull(skb, 4 + NET_IP_ALIGN);
1121
1122                 packet = skb->data;
1123
1124                 /* get the packet length */
1125                 size = (rx_cmd_a & RX_CMD_A_LEN) - NET_IP_ALIGN;
1126                 align_count = (4 - ((size + NET_IP_ALIGN) % 4)) % 4;
1127
1128                 if (unlikely(rx_cmd_a & RX_CMD_A_RED)) {
1129                         netif_dbg(dev, rx_err, dev->net,
1130                                 "Error rx_cmd_a=0x%08x", rx_cmd_a);
1131                         dev->net->stats.rx_errors++;
1132                         dev->net->stats.rx_dropped++;
1133
1134                         if (rx_cmd_a & RX_CMD_A_FCS)
1135                                 dev->net->stats.rx_crc_errors++;
1136                         else if (rx_cmd_a & (RX_CMD_A_LONG | RX_CMD_A_RUNT))
1137                                 dev->net->stats.rx_frame_errors++;
1138                 } else {
1139                         /* ETH_FRAME_LEN + 4(CRC) + 2(COE) + 4(Vlan) */
1140                         if (unlikely(size > (ETH_FRAME_LEN + 12))) {
1141                                 netif_dbg(dev, rx_err, dev->net,
1142                                         "size err rx_cmd_a=0x%08x", rx_cmd_a);
1143                                 return 0;
1144                         }
1145
1146                         /* last frame in this batch */
1147                         if (skb->len == size) {
1148                                 if (pdata->use_rx_csum)
1149                                         smsc75xx_rx_csum_offload(skb, rx_cmd_a,
1150                                                 rx_cmd_b);
1151                                 else
1152                                         skb->ip_summed = CHECKSUM_NONE;
1153
1154                                 skb_trim(skb, skb->len - 4); /* remove fcs */
1155                                 skb->truesize = size + sizeof(struct sk_buff);
1156
1157                                 return 1;
1158                         }
1159
1160                         ax_skb = skb_clone(skb, GFP_ATOMIC);
1161                         if (unlikely(!ax_skb)) {
1162                                 netdev_warn(dev->net, "Error allocating skb");
1163                                 return 0;
1164                         }
1165
1166                         ax_skb->len = size;
1167                         ax_skb->data = packet;
1168                         skb_set_tail_pointer(ax_skb, size);
1169
1170                         if (pdata->use_rx_csum)
1171                                 smsc75xx_rx_csum_offload(ax_skb, rx_cmd_a,
1172                                         rx_cmd_b);
1173                         else
1174                                 ax_skb->ip_summed = CHECKSUM_NONE;
1175
1176                         skb_trim(ax_skb, ax_skb->len - 4); /* remove fcs */
1177                         ax_skb->truesize = size + sizeof(struct sk_buff);
1178
1179                         usbnet_skb_return(dev, ax_skb);
1180                 }
1181
1182                 skb_pull(skb, size);
1183
1184                 /* padding bytes before the next frame starts */
1185                 if (skb->len)
1186                         skb_pull(skb, align_count);
1187         }
1188
1189         if (unlikely(skb->len < 0)) {
1190                 netdev_warn(dev->net, "invalid rx length<0 %d", skb->len);
1191                 return 0;
1192         }
1193
1194         return 1;
1195 }
1196
1197 static struct sk_buff *smsc75xx_tx_fixup(struct usbnet *dev,
1198                                          struct sk_buff *skb, gfp_t flags)
1199 {
1200         u32 tx_cmd_a, tx_cmd_b;
1201
1202         skb_linearize(skb);
1203
1204         if (skb_headroom(skb) < SMSC75XX_TX_OVERHEAD) {
1205                 struct sk_buff *skb2 =
1206                         skb_copy_expand(skb, SMSC75XX_TX_OVERHEAD, 0, flags);
1207                 dev_kfree_skb_any(skb);
1208                 skb = skb2;
1209                 if (!skb)
1210                         return NULL;
1211         }
1212
1213         tx_cmd_a = (u32)(skb->len & TX_CMD_A_LEN) | TX_CMD_A_FCS;
1214
1215         if (skb->ip_summed == CHECKSUM_PARTIAL)
1216                 tx_cmd_a |= TX_CMD_A_IPE | TX_CMD_A_TPE;
1217
1218         if (skb_is_gso(skb)) {
1219                 u16 mss = max(skb_shinfo(skb)->gso_size, TX_MSS_MIN);
1220                 tx_cmd_b = (mss << TX_CMD_B_MSS_SHIFT) & TX_CMD_B_MSS;
1221
1222                 tx_cmd_a |= TX_CMD_A_LSO;
1223         } else {
1224                 tx_cmd_b = 0;
1225         }
1226
1227         skb_push(skb, 4);
1228         cpu_to_le32s(&tx_cmd_b);
1229         memcpy(skb->data, &tx_cmd_b, 4);
1230
1231         skb_push(skb, 4);
1232         cpu_to_le32s(&tx_cmd_a);
1233         memcpy(skb->data, &tx_cmd_a, 4);
1234
1235         return skb;
1236 }
1237
1238 static const struct driver_info smsc75xx_info = {
1239         .description    = "smsc75xx USB 2.0 Gigabit Ethernet",
1240         .bind           = smsc75xx_bind,
1241         .unbind         = smsc75xx_unbind,
1242         .link_reset     = smsc75xx_link_reset,
1243         .reset          = smsc75xx_reset,
1244         .rx_fixup       = smsc75xx_rx_fixup,
1245         .tx_fixup       = smsc75xx_tx_fixup,
1246         .status         = smsc75xx_status,
1247         .flags          = FLAG_ETHER | FLAG_SEND_ZLP,
1248 };
1249
1250 static const struct usb_device_id products[] = {
1251         {
1252                 /* SMSC7500 USB Gigabit Ethernet Device */
1253                 USB_DEVICE(USB_VENDOR_ID_SMSC, USB_PRODUCT_ID_LAN7500),
1254                 .driver_info = (unsigned long) &smsc75xx_info,
1255         },
1256         {
1257                 /* SMSC7500 USB Gigabit Ethernet Device */
1258                 USB_DEVICE(USB_VENDOR_ID_SMSC, USB_PRODUCT_ID_LAN7505),
1259                 .driver_info = (unsigned long) &smsc75xx_info,
1260         },
1261         { },            /* END */
1262 };
1263 MODULE_DEVICE_TABLE(usb, products);
1264
1265 static struct usb_driver smsc75xx_driver = {
1266         .name           = SMSC_CHIPNAME,
1267         .id_table       = products,
1268         .probe          = usbnet_probe,
1269         .suspend        = usbnet_suspend,
1270         .resume         = usbnet_resume,
1271         .disconnect     = usbnet_disconnect,
1272 };
1273
1274 static int __init smsc75xx_init(void)
1275 {
1276         return usb_register(&smsc75xx_driver);
1277 }
1278 module_init(smsc75xx_init);
1279
1280 static void __exit smsc75xx_exit(void)
1281 {
1282         usb_deregister(&smsc75xx_driver);
1283 }
1284 module_exit(smsc75xx_exit);
1285
1286 MODULE_AUTHOR("Nancy Lin");
1287 MODULE_AUTHOR("Steve Glendinning <steve.glendinning@smsc.com>");
1288 MODULE_DESCRIPTION("SMSC75XX USB 2.0 Gigabit Ethernet Devices");
1289 MODULE_LICENSE("GPL");