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/bitrev.h>
  30 #include <linux/crc16.h>
  31 #include <linux/crc32.h>
  32 #include <linux/usb/usbnet.h>
  33 #include <linux/slab.h>
  34 #include "smsc75xx.h"
  35
  36 #define SMSC_CHIPNAME                   "smsc75xx"
  37 #define SMSC_DRIVER_VERSION             "1.0.0"
  38 #define HS_USB_PKT_SIZE                 (512)
  39 #define FS_USB_PKT_SIZE                 (64)
  40 #define DEFAULT_HS_BURST_CAP_SIZE       (16 * 1024 + 5 * HS_USB_PKT_SIZE)
  41 #define DEFAULT_FS_BURST_CAP_SIZE       (6 * 1024 + 33 * FS_USB_PKT_SIZE)
  42 #define DEFAULT_BULK_IN_DELAY           (0x00002000)
  43 #define MAX_SINGLE_PACKET_SIZE          (9000)
  44 #define LAN75XX_EEPROM_MAGIC            (0x7500)
  45 #define EEPROM_MAC_OFFSET               (0x01)
  46 #define DEFAULT_TX_CSUM_ENABLE          (true)
  47 #define DEFAULT_RX_CSUM_ENABLE          (true)
  48 #define DEFAULT_TSO_ENABLE              (true)
  49 #define SMSC75XX_INTERNAL_PHY_ID        (1)
  50 #define SMSC75XX_TX_OVERHEAD            (8)
  51 #define MAX_RX_FIFO_SIZE                (20 * 1024)
  52 #define MAX_TX_FIFO_SIZE                (12 * 1024)
  53 #define USB_VENDOR_ID_SMSC              (0x0424)
  54 #define USB_PRODUCT_ID_LAN7500          (0x7500)
  55 #define USB_PRODUCT_ID_LAN7505          (0x7505)
  56 #define RXW_PADDING                     2
  57 #define SUPPORTED_WAKE                  (WAKE_UCAST | WAKE_BCAST | \
  58                                          WAKE_MCAST | WAKE_ARP | WAKE_MAGIC)
  59
  60 #define check_warn(ret, fmt, args...) \
  61         ({ if (ret < 0) netdev_warn(dev->net, fmt, ##args); })
  62
  63 #define check_warn_return(ret, fmt, args...) \
  64         ({ if (ret < 0) { netdev_warn(dev->net, fmt, ##args); return ret; } })
  65
  66 #define check_warn_goto_done(ret, fmt, args...) \
  67         ({ if (ret < 0) { netdev_warn(dev->net, fmt, ##args); goto done; } })
  68
  69 struct smsc75xx_priv {
  70         struct usbnet *dev;
  71         u32 rfe_ctl;
  72         u32 wolopts;
  73         u32 multicast_hash_table[DP_SEL_VHF_HASH_LEN];
  74         struct mutex dataport_mutex;
  75         spinlock_t rfe_ctl_lock;
  76         struct work_struct set_multicast;
  77 };
  78
  79 struct usb_context {
  80         struct usb_ctrlrequest req;
  81         struct usbnet *dev;
  82 };
  83
  84 static bool turbo_mode = true;
  85 module_param(turbo_mode, bool, 0644);
  86 MODULE_PARM_DESC(turbo_mode, "Enable multiple frames per Rx transaction");
  87
  88 static int __must_check smsc75xx_read_reg(struct usbnet *dev, u32 index,
  89                                           u32 *data)
  90 {
  91         u32 buf;
  92         int ret;
  93
  94         BUG_ON(!dev);
  95
  96         ret = usbnet_read_cmd(dev, USB_VENDOR_REQUEST_READ_REGISTER,
  97                               USB_DIR_IN | USB_TYPE_VENDOR |
  98                               USB_RECIP_DEVICE,
  99                               0, index, &buf, 4);
 100         if (unlikely(ret < 0))
 101                 netdev_warn(dev->net,
 102                         "Failed to read reg index 0x%08x: %d", index, ret);
 103
 104         le32_to_cpus(&buf);
 105         *data = 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;
 114         int ret;
 115
 116         BUG_ON(!dev);
 117
 118         buf = data;
 119         cpu_to_le32s(&buf);
 120
 121         ret = usbnet_write_cmd(dev, USB_VENDOR_REQUEST_WRITE_REGISTER,
 122                                USB_DIR_OUT | USB_TYPE_VENDOR |
 123                                USB_RECIP_DEVICE,
 124                                0, index, &buf, 4);
 125         if (unlikely(ret < 0))
 126                 netdev_warn(dev->net,
 127                         "Failed to write reg index 0x%08x: %d", index, ret);
 128
 129         return ret;
 130 }
 131
 132 static int smsc75xx_set_feature(struct usbnet *dev, u32 feature)
 133 {
 134         if (WARN_ON_ONCE(!dev))
 135                 return -EINVAL;
 136
 137         cpu_to_le32s(&feature);
 138
 139         return usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0),
 140                 USB_REQ_SET_FEATURE, USB_RECIP_DEVICE, feature, 0, NULL, 0,
 141                 USB_CTRL_SET_TIMEOUT);
 142 }
 143
 144 static int smsc75xx_clear_feature(struct usbnet *dev, u32 feature)
 145 {
 146         if (WARN_ON_ONCE(!dev))
 147                 return -EINVAL;
 148
 149         cpu_to_le32s(&feature);
 150
 151         return usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0),
 152                 USB_REQ_CLEAR_FEATURE, USB_RECIP_DEVICE, feature, 0, NULL, 0,
 153                 USB_CTRL_SET_TIMEOUT);
 154 }
 155
 156 /* Loop until the read is completed with timeout
 157  * called with phy_mutex held */
 158 static int smsc75xx_phy_wait_not_busy(struct usbnet *dev)
 159 {
 160         unsigned long start_time = jiffies;
 161         u32 val;
 162         int ret;
 163
 164         do {
 165                 ret = smsc75xx_read_reg(dev, MII_ACCESS, &val);
 166                 check_warn_return(ret, "Error reading MII_ACCESS");
 167
 168                 if (!(val & MII_ACCESS_BUSY))
 169                         return 0;
 170         } while (!time_after(jiffies, start_time + HZ));
 171
 172         return -EIO;
 173 }
 174
 175 static int smsc75xx_mdio_read(struct net_device *netdev, int phy_id, int idx)
 176 {
 177         struct usbnet *dev = netdev_priv(netdev);
 178         u32 val, addr;
 179         int ret;
 180
 181         mutex_lock(&dev->phy_mutex);
 182
 183         /* confirm MII not busy */
 184         ret = smsc75xx_phy_wait_not_busy(dev);
 185         check_warn_goto_done(ret, "MII is busy in smsc75xx_mdio_read");
 186
 187         /* set the address, index & direction (read from PHY) */
 188         phy_id &= dev->mii.phy_id_mask;
 189         idx &= dev->mii.reg_num_mask;
 190         addr = ((phy_id << MII_ACCESS_PHY_ADDR_SHIFT) & MII_ACCESS_PHY_ADDR)
 191                 | ((idx << MII_ACCESS_REG_ADDR_SHIFT) & MII_ACCESS_REG_ADDR)
 192                 | MII_ACCESS_READ | MII_ACCESS_BUSY;
 193         ret = smsc75xx_write_reg(dev, MII_ACCESS, addr);
 194         check_warn_goto_done(ret, "Error writing MII_ACCESS");
 195
 196         ret = smsc75xx_phy_wait_not_busy(dev);
 197         check_warn_goto_done(ret, "Timed out reading MII reg %02X", idx);
 198
 199         ret = smsc75xx_read_reg(dev, MII_DATA, &val);
 200         check_warn_goto_done(ret, "Error reading MII_DATA");
 201
 202         ret = (u16)(val & 0xFFFF);
 203
 204 done:
 205         mutex_unlock(&dev->phy_mutex);
 206         return ret;
 207 }
 208
 209 static void smsc75xx_mdio_write(struct net_device *netdev, int phy_id, int idx,
 210                                 int regval)
 211 {
 212         struct usbnet *dev = netdev_priv(netdev);
 213         u32 val, addr;
 214         int ret;
 215
 216         mutex_lock(&dev->phy_mutex);
 217
 218         /* confirm MII not busy */
 219         ret = smsc75xx_phy_wait_not_busy(dev);
 220         check_warn_goto_done(ret, "MII is busy in smsc75xx_mdio_write");
 221
 222         val = regval;
 223         ret = smsc75xx_write_reg(dev, MII_DATA, val);
 224         check_warn_goto_done(ret, "Error writing MII_DATA");
 225
 226         /* set the address, index & direction (write to PHY) */
 227         phy_id &= dev->mii.phy_id_mask;
 228         idx &= dev->mii.reg_num_mask;
 229         addr = ((phy_id << MII_ACCESS_PHY_ADDR_SHIFT) & MII_ACCESS_PHY_ADDR)
 230                 | ((idx << MII_ACCESS_REG_ADDR_SHIFT) & MII_ACCESS_REG_ADDR)
 231                 | MII_ACCESS_WRITE | MII_ACCESS_BUSY;
 232         ret = smsc75xx_write_reg(dev, MII_ACCESS, addr);
 233         check_warn_goto_done(ret, "Error writing MII_ACCESS");
 234
 235         ret = smsc75xx_phy_wait_not_busy(dev);
 236         check_warn_goto_done(ret, "Timed out writing MII reg %02X", idx);
 237
 238 done:
 239         mutex_unlock(&dev->phy_mutex);
 240 }
 241
 242 static int smsc75xx_wait_eeprom(struct usbnet *dev)
 243 {
 244         unsigned long start_time = jiffies;
 245         u32 val;
 246         int ret;
 247
 248         do {
 249                 ret = smsc75xx_read_reg(dev, E2P_CMD, &val);
 250                 check_warn_return(ret, "Error reading E2P_CMD");
 251
 252                 if (!(val & E2P_CMD_BUSY) || (val & E2P_CMD_TIMEOUT))
 253                         break;
 254                 udelay(40);
 255         } while (!time_after(jiffies, start_time + HZ));
 256
 257         if (val & (E2P_CMD_TIMEOUT | E2P_CMD_BUSY)) {
 258                 netdev_warn(dev->net, "EEPROM read operation timeout");
 259                 return -EIO;
 260         }
 261
 262         return 0;
 263 }
 264
 265 static int smsc75xx_eeprom_confirm_not_busy(struct usbnet *dev)
 266 {
 267         unsigned long start_time = jiffies;
 268         u32 val;
 269         int ret;
 270
 271         do {
 272                 ret = smsc75xx_read_reg(dev, E2P_CMD, &val);
 273                 check_warn_return(ret, "Error reading E2P_CMD");
 274
 275                 if (!(val & E2P_CMD_BUSY))
 276                         return 0;
 277
 278                 udelay(40);
 279         } while (!time_after(jiffies, start_time + HZ));
 280
 281         netdev_warn(dev->net, "EEPROM is busy");
 282         return -EIO;
 283 }
 284
 285 static int smsc75xx_read_eeprom(struct usbnet *dev, u32 offset, u32 length,
 286                                 u8 *data)
 287 {
 288         u32 val;
 289         int i, ret;
 290
 291         BUG_ON(!dev);
 292         BUG_ON(!data);
 293
 294         ret = smsc75xx_eeprom_confirm_not_busy(dev);
 295         if (ret)
 296                 return ret;
 297
 298         for (i = 0; i < length; i++) {
 299                 val = E2P_CMD_BUSY | E2P_CMD_READ | (offset & E2P_CMD_ADDR);
 300                 ret = smsc75xx_write_reg(dev, E2P_CMD, val);
 301                 check_warn_return(ret, "Error writing E2P_CMD");
 302
 303                 ret = smsc75xx_wait_eeprom(dev);
 304                 if (ret < 0)
 305                         return ret;
 306
 307                 ret = smsc75xx_read_reg(dev, E2P_DATA, &val);
 308                 check_warn_return(ret, "Error reading E2P_DATA");
 309
 310                 data[i] = val & 0xFF;
 311                 offset++;
 312         }
 313
 314         return 0;
 315 }
 316
 317 static int smsc75xx_write_eeprom(struct usbnet *dev, u32 offset, u32 length,
 318                                  u8 *data)
 319 {
 320         u32 val;
 321         int i, ret;
 322
 323         BUG_ON(!dev);
 324         BUG_ON(!data);
 325
 326         ret = smsc75xx_eeprom_confirm_not_busy(dev);
 327         if (ret)
 328                 return ret;
 329
 330         /* Issue write/erase enable command */
 331         val = E2P_CMD_BUSY | E2P_CMD_EWEN;
 332         ret = smsc75xx_write_reg(dev, E2P_CMD, val);
 333         check_warn_return(ret, "Error writing E2P_CMD");
 334
 335         ret = smsc75xx_wait_eeprom(dev);
 336         if (ret < 0)
 337                 return ret;
 338
 339         for (i = 0; i < length; i++) {
 340
 341                 /* Fill data register */
 342                 val = data[i];
 343                 ret = smsc75xx_write_reg(dev, E2P_DATA, val);
 344                 check_warn_return(ret, "Error writing E2P_DATA");
 345
 346                 /* Send "write" command */
 347                 val = E2P_CMD_BUSY | E2P_CMD_WRITE | (offset & E2P_CMD_ADDR);
 348                 ret = smsc75xx_write_reg(dev, E2P_CMD, val);
 349                 check_warn_return(ret, "Error writing E2P_CMD");
 350
 351                 ret = smsc75xx_wait_eeprom(dev);
 352                 if (ret < 0)
 353                         return ret;
 354
 355                 offset++;
 356         }
 357
 358         return 0;
 359 }
 360
 361 static int smsc75xx_dataport_wait_not_busy(struct usbnet *dev)
 362 {
 363         int i, ret;
 364
 365         for (i = 0; i < 100; i++) {
 366                 u32 dp_sel;
 367                 ret = smsc75xx_read_reg(dev, DP_SEL, &dp_sel);
 368                 check_warn_return(ret, "Error reading DP_SEL");
 369
 370                 if (dp_sel & DP_SEL_DPRDY)
 371                         return 0;
 372
 373                 udelay(40);
 374         }
 375
 376         netdev_warn(dev->net, "smsc75xx_dataport_wait_not_busy timed out");
 377
 378         return -EIO;
 379 }
 380
 381 static int smsc75xx_dataport_write(struct usbnet *dev, u32 ram_select, u32 addr,
 382                                    u32 length, u32 *buf)
 383 {
 384         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 385         u32 dp_sel;
 386         int i, ret;
 387
 388         mutex_lock(&pdata->dataport_mutex);
 389
 390         ret = smsc75xx_dataport_wait_not_busy(dev);
 391         check_warn_goto_done(ret, "smsc75xx_dataport_write busy on entry");
 392
 393         ret = smsc75xx_read_reg(dev, DP_SEL, &dp_sel);
 394         check_warn_goto_done(ret, "Error reading DP_SEL");
 395
 396         dp_sel &= ~DP_SEL_RSEL;
 397         dp_sel |= ram_select;
 398         ret = smsc75xx_write_reg(dev, DP_SEL, dp_sel);
 399         check_warn_goto_done(ret, "Error writing DP_SEL");
 400
 401         for (i = 0; i < length; i++) {
 402                 ret = smsc75xx_write_reg(dev, DP_ADDR, addr + i);
 403                 check_warn_goto_done(ret, "Error writing DP_ADDR");
 404
 405                 ret = smsc75xx_write_reg(dev, DP_DATA, buf[i]);
 406                 check_warn_goto_done(ret, "Error writing DP_DATA");
 407
 408                 ret = smsc75xx_write_reg(dev, DP_CMD, DP_CMD_WRITE);
 409                 check_warn_goto_done(ret, "Error writing DP_CMD");
 410
 411                 ret = smsc75xx_dataport_wait_not_busy(dev);
 412                 check_warn_goto_done(ret, "smsc75xx_dataport_write timeout");
 413         }
 414
 415 done:
 416         mutex_unlock(&pdata->dataport_mutex);
 417         return ret;
 418 }
 419
 420 /* returns hash bit number for given MAC address */
 421 static u32 smsc75xx_hash(char addr[ETH_ALEN])
 422 {
 423         return (ether_crc(ETH_ALEN, addr) >> 23) & 0x1ff;
 424 }
 425
 426 static void smsc75xx_deferred_multicast_write(struct work_struct *param)
 427 {
 428         struct smsc75xx_priv *pdata =
 429                 container_of(param, struct smsc75xx_priv, set_multicast);
 430         struct usbnet *dev = pdata->dev;
 431         int ret;
 432
 433         netif_dbg(dev, drv, dev->net, "deferred multicast write 0x%08x",
 434                 pdata->rfe_ctl);
 435
 436         smsc75xx_dataport_write(dev, DP_SEL_VHF, DP_SEL_VHF_VLAN_LEN,
 437                 DP_SEL_VHF_HASH_LEN, pdata->multicast_hash_table);
 438
 439         ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
 440         check_warn(ret, "Error writing RFE_CRL");
 441 }
 442
 443 static void smsc75xx_set_multicast(struct net_device *netdev)
 444 {
 445         struct usbnet *dev = netdev_priv(netdev);
 446         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 447         unsigned long flags;
 448         int i;
 449
 450         spin_lock_irqsave(&pdata->rfe_ctl_lock, flags);
 451
 452         pdata->rfe_ctl &=
 453                 ~(RFE_CTL_AU | RFE_CTL_AM | RFE_CTL_DPF | RFE_CTL_MHF);
 454         pdata->rfe_ctl |= RFE_CTL_AB;
 455
 456         for (i = 0; i < DP_SEL_VHF_HASH_LEN; i++)
 457                 pdata->multicast_hash_table[i] = 0;
 458
 459         if (dev->net->flags & IFF_PROMISC) {
 460                 netif_dbg(dev, drv, dev->net, "promiscuous mode enabled");
 461                 pdata->rfe_ctl |= RFE_CTL_AM | RFE_CTL_AU;
 462         } else if (dev->net->flags & IFF_ALLMULTI) {
 463                 netif_dbg(dev, drv, dev->net, "receive all multicast enabled");
 464                 pdata->rfe_ctl |= RFE_CTL_AM | RFE_CTL_DPF;
 465         } else if (!netdev_mc_empty(dev->net)) {
 466                 struct netdev_hw_addr *ha;
 467
 468                 netif_dbg(dev, drv, dev->net, "receive multicast hash filter");
 469
 470                 pdata->rfe_ctl |= RFE_CTL_MHF | RFE_CTL_DPF;
 471
 472                 netdev_for_each_mc_addr(ha, netdev) {
 473                         u32 bitnum = smsc75xx_hash(ha->addr);
 474                         pdata->multicast_hash_table[bitnum / 32] |=
 475                                 (1 << (bitnum % 32));
 476                 }
 477         } else {
 478                 netif_dbg(dev, drv, dev->net, "receive own packets only");
 479                 pdata->rfe_ctl |= RFE_CTL_DPF;
 480         }
 481
 482         spin_unlock_irqrestore(&pdata->rfe_ctl_lock, flags);
 483
 484         /* defer register writes to a sleepable context */
 485         schedule_work(&pdata->set_multicast);
 486 }
 487
 488 static int smsc75xx_update_flowcontrol(struct usbnet *dev, u8 duplex,
 489                                             u16 lcladv, u16 rmtadv)
 490 {
 491         u32 flow = 0, fct_flow = 0;
 492         int ret;
 493
 494         if (duplex == DUPLEX_FULL) {
 495                 u8 cap = mii_resolve_flowctrl_fdx(lcladv, rmtadv);
 496
 497                 if (cap & FLOW_CTRL_TX) {
 498                         flow = (FLOW_TX_FCEN | 0xFFFF);
 499                         /* set fct_flow thresholds to 20% and 80% */
 500                         fct_flow = (8 << 8) | 32;
 501                 }
 502
 503                 if (cap & FLOW_CTRL_RX)
 504                         flow |= FLOW_RX_FCEN;
 505
 506                 netif_dbg(dev, link, dev->net, "rx pause %s, tx pause %s",
 507                         (cap & FLOW_CTRL_RX ? "enabled" : "disabled"),
 508                         (cap & FLOW_CTRL_TX ? "enabled" : "disabled"));
 509         } else {
 510                 netif_dbg(dev, link, dev->net, "half duplex");
 511         }
 512
 513         ret = smsc75xx_write_reg(dev, FLOW, flow);
 514         check_warn_return(ret, "Error writing FLOW");
 515
 516         ret = smsc75xx_write_reg(dev, FCT_FLOW, fct_flow);
 517         check_warn_return(ret, "Error writing FCT_FLOW");
 518
 519         return 0;
 520 }
 521
 522 static int smsc75xx_link_reset(struct usbnet *dev)
 523 {
 524         struct mii_if_info *mii = &dev->mii;
 525         struct ethtool_cmd ecmd = { .cmd = ETHTOOL_GSET };
 526         u16 lcladv, rmtadv;
 527         int ret;
 528
 529         /* write to clear phy interrupt status */
 530         smsc75xx_mdio_write(dev->net, mii->phy_id, PHY_INT_SRC,
 531                 PHY_INT_SRC_CLEAR_ALL);
 532
 533         ret = smsc75xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL);
 534         check_warn_return(ret, "Error writing INT_STS");
 535
 536         mii_check_media(mii, 1, 1);
 537         mii_ethtool_gset(&dev->mii, &ecmd);
 538         lcladv = smsc75xx_mdio_read(dev->net, mii->phy_id, MII_ADVERTISE);
 539         rmtadv = smsc75xx_mdio_read(dev->net, mii->phy_id, MII_LPA);
 540
 541         netif_dbg(dev, link, dev->net, "speed: %u duplex: %d lcladv: %04x"
 542                   " rmtadv: %04x", ethtool_cmd_speed(&ecmd),
 543                   ecmd.duplex, lcladv, rmtadv);
 544
 545         return smsc75xx_update_flowcontrol(dev, ecmd.duplex, lcladv, rmtadv);
 546 }
 547
 548 static void smsc75xx_status(struct usbnet *dev, struct urb *urb)
 549 {
 550         u32 intdata;
 551
 552         if (urb->actual_length != 4) {
 553                 netdev_warn(dev->net,
 554                         "unexpected urb length %d", urb->actual_length);
 555                 return;
 556         }
 557
 558         memcpy(&intdata, urb->transfer_buffer, 4);
 559         le32_to_cpus(&intdata);
 560
 561         netif_dbg(dev, link, dev->net, "intdata: 0x%08X", intdata);
 562
 563         if (intdata & INT_ENP_PHY_INT)
 564                 usbnet_defer_kevent(dev, EVENT_LINK_RESET);
 565         else
 566                 netdev_warn(dev->net,
 567                         "unexpected interrupt, intdata=0x%08X", intdata);
 568 }
 569
 570 static int smsc75xx_ethtool_get_eeprom_len(struct net_device *net)
 571 {
 572         return MAX_EEPROM_SIZE;
 573 }
 574
 575 static int smsc75xx_ethtool_get_eeprom(struct net_device *netdev,
 576                                        struct ethtool_eeprom *ee, u8 *data)
 577 {
 578         struct usbnet *dev = netdev_priv(netdev);
 579
 580         ee->magic = LAN75XX_EEPROM_MAGIC;
 581
 582         return smsc75xx_read_eeprom(dev, ee->offset, ee->len, data);
 583 }
 584
 585 static int smsc75xx_ethtool_set_eeprom(struct net_device *netdev,
 586                                        struct ethtool_eeprom *ee, u8 *data)
 587 {
 588         struct usbnet *dev = netdev_priv(netdev);
 589
 590         if (ee->magic != LAN75XX_EEPROM_MAGIC) {
 591                 netdev_warn(dev->net,
 592                         "EEPROM: magic value mismatch: 0x%x", ee->magic);
 593                 return -EINVAL;
 594         }
 595
 596         return smsc75xx_write_eeprom(dev, ee->offset, ee->len, data);
 597 }
 598
 599 static void smsc75xx_ethtool_get_wol(struct net_device *net,
 600                                      struct ethtool_wolinfo *wolinfo)
 601 {
 602         struct usbnet *dev = netdev_priv(net);
 603         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 604
 605         wolinfo->supported = SUPPORTED_WAKE;
 606         wolinfo->wolopts = pdata->wolopts;
 607 }
 608
 609 static int smsc75xx_ethtool_set_wol(struct net_device *net,
 610                                     struct ethtool_wolinfo *wolinfo)
 611 {
 612         struct usbnet *dev = netdev_priv(net);
 613         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 614
 615         pdata->wolopts = wolinfo->wolopts & SUPPORTED_WAKE;
 616         return 0;
 617 }
 618
 619 static const struct ethtool_ops smsc75xx_ethtool_ops = {
 620         .get_link       = usbnet_get_link,
 621         .nway_reset     = usbnet_nway_reset,
 622         .get_drvinfo    = usbnet_get_drvinfo,
 623         .get_msglevel   = usbnet_get_msglevel,
 624         .set_msglevel   = usbnet_set_msglevel,
 625         .get_settings   = usbnet_get_settings,
 626         .set_settings   = usbnet_set_settings,
 627         .get_eeprom_len = smsc75xx_ethtool_get_eeprom_len,
 628         .get_eeprom     = smsc75xx_ethtool_get_eeprom,
 629         .set_eeprom     = smsc75xx_ethtool_set_eeprom,
 630         .get_wol        = smsc75xx_ethtool_get_wol,
 631         .set_wol        = smsc75xx_ethtool_set_wol,
 632 };
 633
 634 static int smsc75xx_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
 635 {
 636         struct usbnet *dev = netdev_priv(netdev);
 637
 638         if (!netif_running(netdev))
 639                 return -EINVAL;
 640
 641         return generic_mii_ioctl(&dev->mii, if_mii(rq), cmd, NULL);
 642 }
 643
 644 static void smsc75xx_init_mac_address(struct usbnet *dev)
 645 {
 646         /* try reading mac address from EEPROM */
 647         if (smsc75xx_read_eeprom(dev, EEPROM_MAC_OFFSET, ETH_ALEN,
 648                         dev->net->dev_addr) == 0) {
 649                 if (is_valid_ether_addr(dev->net->dev_addr)) {
 650                         /* eeprom values are valid so use them */
 651                         netif_dbg(dev, ifup, dev->net,
 652                                 "MAC address read from EEPROM");
 653                         return;
 654                 }
 655         }
 656
 657         /* no eeprom, or eeprom values are invalid. generate random MAC */
 658         eth_hw_addr_random(dev->net);
 659         netif_dbg(dev, ifup, dev->net, "MAC address set to eth_random_addr");
 660 }
 661
 662 static int smsc75xx_set_mac_address(struct usbnet *dev)
 663 {
 664         u32 addr_lo = dev->net->dev_addr[0] | dev->net->dev_addr[1] << 8 |
 665                 dev->net->dev_addr[2] << 16 | dev->net->dev_addr[3] << 24;
 666         u32 addr_hi = dev->net->dev_addr[4] | dev->net->dev_addr[5] << 8;
 667
 668         int ret = smsc75xx_write_reg(dev, RX_ADDRH, addr_hi);
 669         check_warn_return(ret, "Failed to write RX_ADDRH: %d", ret);
 670
 671         ret = smsc75xx_write_reg(dev, RX_ADDRL, addr_lo);
 672         check_warn_return(ret, "Failed to write RX_ADDRL: %d", ret);
 673
 674         addr_hi |= ADDR_FILTX_FB_VALID;
 675         ret = smsc75xx_write_reg(dev, ADDR_FILTX, addr_hi);
 676         check_warn_return(ret, "Failed to write ADDR_FILTX: %d", ret);
 677
 678         ret = smsc75xx_write_reg(dev, ADDR_FILTX + 4, addr_lo);
 679         check_warn_return(ret, "Failed to write ADDR_FILTX+4: %d", ret);
 680
 681         return 0;
 682 }
 683
 684 static int smsc75xx_phy_initialize(struct usbnet *dev)
 685 {
 686         int bmcr, ret, timeout = 0;
 687
 688         /* Initialize MII structure */
 689         dev->mii.dev = dev->net;
 690         dev->mii.mdio_read = smsc75xx_mdio_read;
 691         dev->mii.mdio_write = smsc75xx_mdio_write;
 692         dev->mii.phy_id_mask = 0x1f;
 693         dev->mii.reg_num_mask = 0x1f;
 694         dev->mii.supports_gmii = 1;
 695         dev->mii.phy_id = SMSC75XX_INTERNAL_PHY_ID;
 696
 697         /* reset phy and wait for reset to complete */
 698         smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_BMCR, BMCR_RESET);
 699
 700         do {
 701                 msleep(10);
 702                 bmcr = smsc75xx_mdio_read(dev->net, dev->mii.phy_id, MII_BMCR);
 703                 check_warn_return(bmcr, "Error reading MII_BMCR");
 704                 timeout++;
 705         } while ((bmcr & BMCR_RESET) && (timeout < 100));
 706
 707         if (timeout >= 100) {
 708                 netdev_warn(dev->net, "timeout on PHY Reset");
 709                 return -EIO;
 710         }
 711
 712         smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_ADVERTISE,
 713                 ADVERTISE_ALL | ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP |
 714                 ADVERTISE_PAUSE_ASYM);
 715         smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_CTRL1000,
 716                 ADVERTISE_1000FULL);
 717
 718         /* read and write to clear phy interrupt status */
 719         ret = smsc75xx_mdio_read(dev->net, dev->mii.phy_id, PHY_INT_SRC);
 720         check_warn_return(ret, "Error reading PHY_INT_SRC");
 721         smsc75xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_SRC, 0xffff);
 722
 723         smsc75xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_MASK,
 724                 PHY_INT_MASK_DEFAULT);
 725         mii_nway_restart(&dev->mii);
 726
 727         netif_dbg(dev, ifup, dev->net, "phy initialised successfully");
 728         return 0;
 729 }
 730
 731 static int smsc75xx_set_rx_max_frame_length(struct usbnet *dev, int size)
 732 {
 733         int ret = 0;
 734         u32 buf;
 735         bool rxenabled;
 736
 737         ret = smsc75xx_read_reg(dev, MAC_RX, &buf);
 738         check_warn_return(ret, "Failed to read MAC_RX: %d", ret);
 739
 740         rxenabled = ((buf & MAC_RX_RXEN) != 0);
 741
 742         if (rxenabled) {
 743                 buf &= ~MAC_RX_RXEN;
 744                 ret = smsc75xx_write_reg(dev, MAC_RX, buf);
 745                 check_warn_return(ret, "Failed to write MAC_RX: %d", ret);
 746         }
 747
 748         /* add 4 to size for FCS */
 749         buf &= ~MAC_RX_MAX_SIZE;
 750         buf |= (((size + 4) << MAC_RX_MAX_SIZE_SHIFT) & MAC_RX_MAX_SIZE);
 751
 752         ret = smsc75xx_write_reg(dev, MAC_RX, buf);
 753         check_warn_return(ret, "Failed to write MAC_RX: %d", ret);
 754
 755         if (rxenabled) {
 756                 buf |= MAC_RX_RXEN;
 757                 ret = smsc75xx_write_reg(dev, MAC_RX, buf);
 758                 check_warn_return(ret, "Failed to write MAC_RX: %d", ret);
 759         }
 760
 761         return 0;
 762 }
 763
 764 static int smsc75xx_change_mtu(struct net_device *netdev, int new_mtu)
 765 {
 766         struct usbnet *dev = netdev_priv(netdev);
 767
 768         int ret = smsc75xx_set_rx_max_frame_length(dev, new_mtu);
 769         check_warn_return(ret, "Failed to set mac rx frame length");
 770
 771         return usbnet_change_mtu(netdev, new_mtu);
 772 }
 773
 774 /* Enable or disable Rx checksum offload engine */
 775 static int smsc75xx_set_features(struct net_device *netdev,
 776         netdev_features_t features)
 777 {
 778         struct usbnet *dev = netdev_priv(netdev);
 779         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 780         unsigned long flags;
 781         int ret;
 782
 783         spin_lock_irqsave(&pdata->rfe_ctl_lock, flags);
 784
 785         if (features & NETIF_F_RXCSUM)
 786                 pdata->rfe_ctl |= RFE_CTL_TCPUDP_CKM | RFE_CTL_IP_CKM;
 787         else
 788                 pdata->rfe_ctl &= ~(RFE_CTL_TCPUDP_CKM | RFE_CTL_IP_CKM);
 789
 790         spin_unlock_irqrestore(&pdata->rfe_ctl_lock, flags);
 791         /* it's racing here! */
 792
 793         ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
 794         check_warn_return(ret, "Error writing RFE_CTL");
 795
 796         return 0;
 797 }
 798
 799 static int smsc75xx_wait_ready(struct usbnet *dev)
 800 {
 801         int timeout = 0;
 802
 803         do {
 804                 u32 buf;
 805                 int ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
 806                 check_warn_return(ret, "Failed to read PMT_CTL: %d", ret);
 807
 808                 if (buf & PMT_CTL_DEV_RDY)
 809                         return 0;
 810
 811                 msleep(10);
 812                 timeout++;
 813         } while (timeout < 100);
 814
 815         netdev_warn(dev->net, "timeout waiting for device ready");
 816         return -EIO;
 817 }
 818
 819 static int smsc75xx_reset(struct usbnet *dev)
 820 {
 821         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 822         u32 buf;
 823         int ret = 0, timeout;
 824
 825         netif_dbg(dev, ifup, dev->net, "entering smsc75xx_reset");
 826
 827         ret = smsc75xx_wait_ready(dev);
 828         check_warn_return(ret, "device not ready in smsc75xx_reset");
 829
 830         ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
 831         check_warn_return(ret, "Failed to read HW_CFG: %d", ret);
 832
 833         buf |= HW_CFG_LRST;
 834
 835         ret = smsc75xx_write_reg(dev, HW_CFG, buf);
 836         check_warn_return(ret, "Failed to write HW_CFG: %d", ret);
 837
 838         timeout = 0;
 839         do {
 840                 msleep(10);
 841                 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
 842                 check_warn_return(ret, "Failed to read HW_CFG: %d", ret);
 843                 timeout++;
 844         } while ((buf & HW_CFG_LRST) && (timeout < 100));
 845
 846         if (timeout >= 100) {
 847                 netdev_warn(dev->net, "timeout on completion of Lite Reset");
 848                 return -EIO;
 849         }
 850
 851         netif_dbg(dev, ifup, dev->net, "Lite reset complete, resetting PHY");
 852
 853         ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
 854         check_warn_return(ret, "Failed to read PMT_CTL: %d", ret);
 855
 856         buf |= PMT_CTL_PHY_RST;
 857
 858         ret = smsc75xx_write_reg(dev, PMT_CTL, buf);
 859         check_warn_return(ret, "Failed to write PMT_CTL: %d", ret);
 860
 861         timeout = 0;
 862         do {
 863                 msleep(10);
 864                 ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
 865                 check_warn_return(ret, "Failed to read PMT_CTL: %d", ret);
 866                 timeout++;
 867         } while ((buf & PMT_CTL_PHY_RST) && (timeout < 100));
 868
 869         if (timeout >= 100) {
 870                 netdev_warn(dev->net, "timeout waiting for PHY Reset");
 871                 return -EIO;
 872         }
 873
 874         netif_dbg(dev, ifup, dev->net, "PHY reset complete");
 875
 876         smsc75xx_init_mac_address(dev);
 877
 878         ret = smsc75xx_set_mac_address(dev);
 879         check_warn_return(ret, "Failed to set mac address");
 880
 881         netif_dbg(dev, ifup, dev->net, "MAC Address: %pM", dev->net->dev_addr);
 882
 883         ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
 884         check_warn_return(ret, "Failed to read HW_CFG: %d", ret);
 885
 886         netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG : 0x%08x", buf);
 887
 888         buf |= HW_CFG_BIR;
 889
 890         ret = smsc75xx_write_reg(dev, HW_CFG, buf);
 891         check_warn_return(ret, "Failed to write HW_CFG: %d", ret);
 892
 893         ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
 894         check_warn_return(ret, "Failed to read HW_CFG: %d", ret);
 895
 896         netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG after "
 897                         "writing HW_CFG_BIR: 0x%08x", buf);
 898
 899         if (!turbo_mode) {
 900                 buf = 0;
 901                 dev->rx_urb_size = MAX_SINGLE_PACKET_SIZE;
 902         } else if (dev->udev->speed == USB_SPEED_HIGH) {
 903                 buf = DEFAULT_HS_BURST_CAP_SIZE / HS_USB_PKT_SIZE;
 904                 dev->rx_urb_size = DEFAULT_HS_BURST_CAP_SIZE;
 905         } else {
 906                 buf = DEFAULT_FS_BURST_CAP_SIZE / FS_USB_PKT_SIZE;
 907                 dev->rx_urb_size = DEFAULT_FS_BURST_CAP_SIZE;
 908         }
 909
 910         netif_dbg(dev, ifup, dev->net, "rx_urb_size=%ld",
 911                 (ulong)dev->rx_urb_size);
 912
 913         ret = smsc75xx_write_reg(dev, BURST_CAP, buf);
 914         check_warn_return(ret, "Failed to write BURST_CAP: %d", ret);
 915
 916         ret = smsc75xx_read_reg(dev, BURST_CAP, &buf);
 917         check_warn_return(ret, "Failed to read BURST_CAP: %d", ret);
 918
 919         netif_dbg(dev, ifup, dev->net,
 920                 "Read Value from BURST_CAP after writing: 0x%08x", buf);
 921
 922         ret = smsc75xx_write_reg(dev, BULK_IN_DLY, DEFAULT_BULK_IN_DELAY);
 923         check_warn_return(ret, "Failed to write BULK_IN_DLY: %d", ret);
 924
 925         ret = smsc75xx_read_reg(dev, BULK_IN_DLY, &buf);
 926         check_warn_return(ret, "Failed to read BULK_IN_DLY: %d", ret);
 927
 928         netif_dbg(dev, ifup, dev->net,
 929                 "Read Value from BULK_IN_DLY after writing: 0x%08x", buf);
 930
 931         if (turbo_mode) {
 932                 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
 933                 check_warn_return(ret, "Failed to read HW_CFG: %d", ret);
 934
 935                 netif_dbg(dev, ifup, dev->net, "HW_CFG: 0x%08x", buf);
 936
 937                 buf |= (HW_CFG_MEF | HW_CFG_BCE);
 938
 939                 ret = smsc75xx_write_reg(dev, HW_CFG, buf);
 940                 check_warn_return(ret, "Failed to write HW_CFG: %d", ret);
 941
 942                 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
 943                 check_warn_return(ret, "Failed to read HW_CFG: %d", ret);
 944
 945                 netif_dbg(dev, ifup, dev->net, "HW_CFG: 0x%08x", buf);
 946         }
 947
 948         /* set FIFO sizes */
 949         buf = (MAX_RX_FIFO_SIZE - 512) / 512;
 950         ret = smsc75xx_write_reg(dev, FCT_RX_FIFO_END, buf);
 951         check_warn_return(ret, "Failed to write FCT_RX_FIFO_END: %d", ret);
 952
 953         netif_dbg(dev, ifup, dev->net, "FCT_RX_FIFO_END set to 0x%08x", buf);
 954
 955         buf = (MAX_TX_FIFO_SIZE - 512) / 512;
 956         ret = smsc75xx_write_reg(dev, FCT_TX_FIFO_END, buf);
 957         check_warn_return(ret, "Failed to write FCT_TX_FIFO_END: %d", ret);
 958
 959         netif_dbg(dev, ifup, dev->net, "FCT_TX_FIFO_END set to 0x%08x", buf);
 960
 961         ret = smsc75xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL);
 962         check_warn_return(ret, "Failed to write INT_STS: %d", ret);
 963
 964         ret = smsc75xx_read_reg(dev, ID_REV, &buf);
 965         check_warn_return(ret, "Failed to read ID_REV: %d", ret);
 966
 967         netif_dbg(dev, ifup, dev->net, "ID_REV = 0x%08x", buf);
 968
 969         ret = smsc75xx_read_reg(dev, E2P_CMD, &buf);
 970         check_warn_return(ret, "Failed to read E2P_CMD: %d", ret);
 971
 972         /* only set default GPIO/LED settings if no EEPROM is detected */
 973         if (!(buf & E2P_CMD_LOADED)) {
 974                 ret = smsc75xx_read_reg(dev, LED_GPIO_CFG, &buf);
 975                 check_warn_return(ret, "Failed to read LED_GPIO_CFG: %d", ret);
 976
 977                 buf &= ~(LED_GPIO_CFG_LED2_FUN_SEL | LED_GPIO_CFG_LED10_FUN_SEL);
 978                 buf |= LED_GPIO_CFG_LEDGPIO_EN | LED_GPIO_CFG_LED2_FUN_SEL;
 979
 980                 ret = smsc75xx_write_reg(dev, LED_GPIO_CFG, buf);
 981                 check_warn_return(ret, "Failed to write LED_GPIO_CFG: %d", ret);
 982         }
 983
 984         ret = smsc75xx_write_reg(dev, FLOW, 0);
 985         check_warn_return(ret, "Failed to write FLOW: %d", ret);
 986
 987         ret = smsc75xx_write_reg(dev, FCT_FLOW, 0);
 988         check_warn_return(ret, "Failed to write FCT_FLOW: %d", ret);
 989
 990         /* Don't need rfe_ctl_lock during initialisation */
 991         ret = smsc75xx_read_reg(dev, RFE_CTL, &pdata->rfe_ctl);
 992         check_warn_return(ret, "Failed to read RFE_CTL: %d", ret);
 993
 994         pdata->rfe_ctl |= RFE_CTL_AB | RFE_CTL_DPF;
 995
 996         ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
 997         check_warn_return(ret, "Failed to write RFE_CTL: %d", ret);
 998
 999         ret = smsc75xx_read_reg(dev, RFE_CTL, &pdata->rfe_ctl);
1000         check_warn_return(ret, "Failed to read RFE_CTL: %d", ret);
1001
1002         netif_dbg(dev, ifup, dev->net, "RFE_CTL set to 0x%08x", pdata->rfe_ctl);
1003
1004         /* Enable or disable checksum offload engines */
1005         smsc75xx_set_features(dev->net, dev->net->features);
1006
1007         smsc75xx_set_multicast(dev->net);
1008
1009         ret = smsc75xx_phy_initialize(dev);
1010         check_warn_return(ret, "Failed to initialize PHY: %d", ret);
1011
1012         ret = smsc75xx_read_reg(dev, INT_EP_CTL, &buf);
1013         check_warn_return(ret, "Failed to read INT_EP_CTL: %d", ret);
1014
1015         /* enable PHY interrupts */
1016         buf |= INT_ENP_PHY_INT;
1017
1018         ret = smsc75xx_write_reg(dev, INT_EP_CTL, buf);
1019         check_warn_return(ret, "Failed to write INT_EP_CTL: %d", ret);
1020
1021         /* allow mac to detect speed and duplex from phy */
1022         ret = smsc75xx_read_reg(dev, MAC_CR, &buf);
1023         check_warn_return(ret, "Failed to read MAC_CR: %d", ret);
1024
1025         buf |= (MAC_CR_ADD | MAC_CR_ASD);
1026         ret = smsc75xx_write_reg(dev, MAC_CR, buf);
1027         check_warn_return(ret, "Failed to write MAC_CR: %d", ret);
1028
1029         ret = smsc75xx_read_reg(dev, MAC_TX, &buf);
1030         check_warn_return(ret, "Failed to read MAC_TX: %d", ret);
1031
1032         buf |= MAC_TX_TXEN;
1033
1034         ret = smsc75xx_write_reg(dev, MAC_TX, buf);
1035         check_warn_return(ret, "Failed to write MAC_TX: %d", ret);
1036
1037         netif_dbg(dev, ifup, dev->net, "MAC_TX set to 0x%08x", buf);
1038
1039         ret = smsc75xx_read_reg(dev, FCT_TX_CTL, &buf);
1040         check_warn_return(ret, "Failed to read FCT_TX_CTL: %d", ret);
1041
1042         buf |= FCT_TX_CTL_EN;
1043
1044         ret = smsc75xx_write_reg(dev, FCT_TX_CTL, buf);
1045         check_warn_return(ret, "Failed to write FCT_TX_CTL: %d", ret);
1046
1047         netif_dbg(dev, ifup, dev->net, "FCT_TX_CTL set to 0x%08x", buf);
1048
1049         ret = smsc75xx_set_rx_max_frame_length(dev, 1514);
1050         check_warn_return(ret, "Failed to set max rx frame length");
1051
1052         ret = smsc75xx_read_reg(dev, MAC_RX, &buf);
1053         check_warn_return(ret, "Failed to read MAC_RX: %d", ret);
1054
1055         buf |= MAC_RX_RXEN;
1056
1057         ret = smsc75xx_write_reg(dev, MAC_RX, buf);
1058         check_warn_return(ret, "Failed to write MAC_RX: %d", ret);
1059
1060         netif_dbg(dev, ifup, dev->net, "MAC_RX set to 0x%08x", buf);
1061
1062         ret = smsc75xx_read_reg(dev, FCT_RX_CTL, &buf);
1063         check_warn_return(ret, "Failed to read FCT_RX_CTL: %d", ret);
1064
1065         buf |= FCT_RX_CTL_EN;
1066
1067         ret = smsc75xx_write_reg(dev, FCT_RX_CTL, buf);
1068         check_warn_return(ret, "Failed to write FCT_RX_CTL: %d", ret);
1069
1070         netif_dbg(dev, ifup, dev->net, "FCT_RX_CTL set to 0x%08x", buf);
1071
1072         netif_dbg(dev, ifup, dev->net, "smsc75xx_reset, return 0");
1073         return 0;
1074 }
1075
1076 static const struct net_device_ops smsc75xx_netdev_ops = {
1077         .ndo_open               = usbnet_open,
1078         .ndo_stop               = usbnet_stop,
1079         .ndo_start_xmit         = usbnet_start_xmit,
1080         .ndo_tx_timeout         = usbnet_tx_timeout,
1081         .ndo_change_mtu         = smsc75xx_change_mtu,
1082         .ndo_set_mac_address    = eth_mac_addr,
1083         .ndo_validate_addr      = eth_validate_addr,
1084         .ndo_do_ioctl           = smsc75xx_ioctl,
1085         .ndo_set_rx_mode        = smsc75xx_set_multicast,
1086         .ndo_set_features       = smsc75xx_set_features,
1087 };
1088
1089 static int smsc75xx_bind(struct usbnet *dev, struct usb_interface *intf)
1090 {
1091         struct smsc75xx_priv *pdata = NULL;
1092         int ret;
1093
1094         printk(KERN_INFO SMSC_CHIPNAME " v" SMSC_DRIVER_VERSION "\n");
1095
1096         ret = usbnet_get_endpoints(dev, intf);
1097         check_warn_return(ret, "usbnet_get_endpoints failed: %d", ret);
1098
1099         dev->data[0] = (unsigned long)kzalloc(sizeof(struct smsc75xx_priv),
1100                 GFP_KERNEL);
1101
1102         pdata = (struct smsc75xx_priv *)(dev->data[0]);
1103         if (!pdata) {
1104                 netdev_warn(dev->net, "Unable to allocate smsc75xx_priv");
1105                 return -ENOMEM;
1106         }
1107
1108         pdata->dev = dev;
1109
1110         spin_lock_init(&pdata->rfe_ctl_lock);
1111         mutex_init(&pdata->dataport_mutex);
1112
1113         INIT_WORK(&pdata->set_multicast, smsc75xx_deferred_multicast_write);
1114
1115         if (DEFAULT_TX_CSUM_ENABLE) {
1116                 dev->net->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
1117                 if (DEFAULT_TSO_ENABLE)
1118                         dev->net->features |= NETIF_F_SG |
1119                                 NETIF_F_TSO | NETIF_F_TSO6;
1120         }
1121         if (DEFAULT_RX_CSUM_ENABLE)
1122                 dev->net->features |= NETIF_F_RXCSUM;
1123
1124         dev->net->hw_features = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
1125                 NETIF_F_SG | NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_RXCSUM;
1126
1127         /* Init all registers */
1128         ret = smsc75xx_reset(dev);
1129
1130         dev->net->netdev_ops = &smsc75xx_netdev_ops;
1131         dev->net->ethtool_ops = &smsc75xx_ethtool_ops;
1132         dev->net->flags |= IFF_MULTICAST;
1133         dev->net->hard_header_len += SMSC75XX_TX_OVERHEAD;
1134         dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len;
1135         return 0;
1136 }
1137
1138 static void smsc75xx_unbind(struct usbnet *dev, struct usb_interface *intf)
1139 {
1140         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1141         if (pdata) {
1142                 netif_dbg(dev, ifdown, dev->net, "free pdata");
1143                 kfree(pdata);
1144                 pdata = NULL;
1145                 dev->data[0] = 0;
1146         }
1147 }
1148
1149 static u16 smsc_crc(const u8 *buffer, size_t len)
1150 {
1151         return bitrev16(crc16(0xFFFF, buffer, len));
1152 }
1153
1154 static int smsc75xx_write_wuff(struct usbnet *dev, int filter, u32 wuf_cfg,
1155                                u32 wuf_mask1)
1156 {
1157         int cfg_base = WUF_CFGX + filter * 4;
1158         int mask_base = WUF_MASKX + filter * 16;
1159         int ret;
1160
1161         ret = smsc75xx_write_reg(dev, cfg_base, wuf_cfg);
1162         check_warn_return(ret, "Error writing WUF_CFGX");
1163
1164         ret = smsc75xx_write_reg(dev, mask_base, wuf_mask1);
1165         check_warn_return(ret, "Error writing WUF_MASKX");
1166
1167         ret = smsc75xx_write_reg(dev, mask_base + 4, 0);
1168         check_warn_return(ret, "Error writing WUF_MASKX");
1169
1170         ret = smsc75xx_write_reg(dev, mask_base + 8, 0);
1171         check_warn_return(ret, "Error writing WUF_MASKX");
1172
1173         ret = smsc75xx_write_reg(dev, mask_base + 12, 0);
1174         check_warn_return(ret, "Error writing WUF_MASKX");
1175
1176         return 0;
1177 }
1178
1179 static int smsc75xx_suspend(struct usb_interface *intf, pm_message_t message)
1180 {
1181         struct usbnet *dev = usb_get_intfdata(intf);
1182         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1183         int ret;
1184         u32 val;
1185
1186         ret = usbnet_suspend(intf, message);
1187         check_warn_return(ret, "usbnet_suspend error");
1188
1189         /* if no wol options set, enter lowest power SUSPEND2 mode */
1190         if (!(pdata->wolopts & SUPPORTED_WAKE)) {
1191                 netdev_info(dev->net, "entering SUSPEND2 mode");
1192
1193                 /* disable energy detect (link up) & wake up events */
1194                 ret = smsc75xx_read_reg(dev, WUCSR, &val);
1195                 check_warn_return(ret, "Error reading WUCSR");
1196
1197                 val &= ~(WUCSR_MPEN | WUCSR_WUEN);
1198
1199                 ret = smsc75xx_write_reg(dev, WUCSR, val);
1200                 check_warn_return(ret, "Error writing WUCSR");
1201
1202                 ret = smsc75xx_read_reg(dev, PMT_CTL, &val);
1203                 check_warn_return(ret, "Error reading PMT_CTL");
1204
1205                 val &= ~(PMT_CTL_ED_EN | PMT_CTL_WOL_EN);
1206
1207                 ret = smsc75xx_write_reg(dev, PMT_CTL, val);
1208                 check_warn_return(ret, "Error writing PMT_CTL");
1209
1210                 /* enter suspend2 mode */
1211                 ret = smsc75xx_read_reg(dev, PMT_CTL, &val);
1212                 check_warn_return(ret, "Error reading PMT_CTL");
1213
1214                 val &= ~(PMT_CTL_SUS_MODE | PMT_CTL_WUPS | PMT_CTL_PHY_RST);
1215                 val |= PMT_CTL_SUS_MODE_2;
1216
1217                 ret = smsc75xx_write_reg(dev, PMT_CTL, val);
1218                 check_warn_return(ret, "Error writing PMT_CTL");
1219
1220                 return 0;
1221         }
1222
1223         if (pdata->wolopts & (WAKE_MCAST | WAKE_ARP)) {
1224                 int i, filter = 0;
1225
1226                 /* disable all filters */
1227                 for (i = 0; i < WUF_NUM; i++) {
1228                         ret = smsc75xx_write_reg(dev, WUF_CFGX + i * 4, 0);
1229                         check_warn_return(ret, "Error writing WUF_CFGX");
1230                 }
1231
1232                 if (pdata->wolopts & WAKE_MCAST) {
1233                         const u8 mcast[] = {0x01, 0x00, 0x5E};
1234                         netdev_info(dev->net, "enabling multicast detection");
1235
1236                         val = WUF_CFGX_EN | WUF_CFGX_ATYPE_MULTICAST
1237                                 | smsc_crc(mcast, 3);
1238                         ret = smsc75xx_write_wuff(dev, filter++, val, 0x0007);
1239                         check_warn_return(ret, "Error writing wakeup filter");
1240                 }
1241
1242                 if (pdata->wolopts & WAKE_ARP) {
1243                         const u8 arp[] = {0x08, 0x06};
1244                         netdev_info(dev->net, "enabling ARP detection");
1245
1246                         val = WUF_CFGX_EN | WUF_CFGX_ATYPE_ALL | (0x0C << 16)
1247                                 | smsc_crc(arp, 2);
1248                         ret = smsc75xx_write_wuff(dev, filter++, val, 0x0003);
1249                         check_warn_return(ret, "Error writing wakeup filter");
1250                 }
1251
1252                 /* clear any pending pattern match packet status */
1253                 ret = smsc75xx_read_reg(dev, WUCSR, &val);
1254                 check_warn_return(ret, "Error reading WUCSR");
1255
1256                 val |= WUCSR_WUFR;
1257
1258                 ret = smsc75xx_write_reg(dev, WUCSR, val);
1259                 check_warn_return(ret, "Error writing WUCSR");
1260
1261                 netdev_info(dev->net, "enabling packet match detection");
1262                 ret = smsc75xx_read_reg(dev, WUCSR, &val);
1263                 check_warn_return(ret, "Error reading WUCSR");
1264
1265                 val |= WUCSR_WUEN;
1266
1267                 ret = smsc75xx_write_reg(dev, WUCSR, val);
1268                 check_warn_return(ret, "Error writing WUCSR");
1269         } else {
1270                 netdev_info(dev->net, "disabling packet match detection");
1271                 ret = smsc75xx_read_reg(dev, WUCSR, &val);
1272                 check_warn_return(ret, "Error reading WUCSR");
1273
1274                 val &= ~WUCSR_WUEN;
1275
1276                 ret = smsc75xx_write_reg(dev, WUCSR, val);
1277                 check_warn_return(ret, "Error writing WUCSR");
1278         }
1279
1280         /* disable magic, bcast & unicast wakeup sources */
1281         ret = smsc75xx_read_reg(dev, WUCSR, &val);
1282         check_warn_return(ret, "Error reading WUCSR");
1283
1284         val &= ~(WUCSR_MPEN | WUCSR_BCST_EN | WUCSR_PFDA_EN);
1285
1286         ret = smsc75xx_write_reg(dev, WUCSR, val);
1287         check_warn_return(ret, "Error writing WUCSR");
1288
1289         if (pdata->wolopts & WAKE_MAGIC) {
1290                 netdev_info(dev->net, "enabling magic packet wakeup");
1291                 ret = smsc75xx_read_reg(dev, WUCSR, &val);
1292                 check_warn_return(ret, "Error reading WUCSR");
1293
1294                 /* clear any pending magic packet status */
1295                 val |= WUCSR_MPR | WUCSR_MPEN;
1296
1297                 ret = smsc75xx_write_reg(dev, WUCSR, val);
1298                 check_warn_return(ret, "Error writing WUCSR");
1299         }
1300
1301         if (pdata->wolopts & WAKE_BCAST) {
1302                 netdev_info(dev->net, "enabling broadcast detection");
1303                 ret = smsc75xx_read_reg(dev, WUCSR, &val);
1304                 check_warn_return(ret, "Error reading WUCSR");
1305
1306                 val |= WUCSR_BCAST_FR | WUCSR_BCST_EN;
1307
1308                 ret = smsc75xx_write_reg(dev, WUCSR, val);
1309                 check_warn_return(ret, "Error writing WUCSR");
1310         }
1311
1312         if (pdata->wolopts & WAKE_UCAST) {
1313                 netdev_info(dev->net, "enabling unicast detection");
1314                 ret = smsc75xx_read_reg(dev, WUCSR, &val);
1315                 check_warn_return(ret, "Error reading WUCSR");
1316
1317                 val |= WUCSR_WUFR | WUCSR_PFDA_EN;
1318
1319                 ret = smsc75xx_write_reg(dev, WUCSR, val);
1320                 check_warn_return(ret, "Error writing WUCSR");
1321         }
1322
1323         /* enable receiver to enable frame reception */
1324         ret = smsc75xx_read_reg(dev, MAC_RX, &val);
1325         check_warn_return(ret, "Failed to read MAC_RX: %d", ret);
1326
1327         val |= MAC_RX_RXEN;
1328
1329         ret = smsc75xx_write_reg(dev, MAC_RX, val);
1330         check_warn_return(ret, "Failed to write MAC_RX: %d", ret);
1331
1332         /* some wol options are enabled, so enter SUSPEND0 */
1333         netdev_info(dev->net, "entering SUSPEND0 mode");
1334
1335         ret = smsc75xx_read_reg(dev, PMT_CTL, &val);
1336         check_warn_return(ret, "Error reading PMT_CTL");
1337
1338         val &= (~(PMT_CTL_SUS_MODE | PMT_CTL_PHY_RST));
1339         val |= PMT_CTL_SUS_MODE_0 | PMT_CTL_WOL_EN | PMT_CTL_WUPS;
1340
1341         ret = smsc75xx_write_reg(dev, PMT_CTL, val);
1342         check_warn_return(ret, "Error writing PMT_CTL");
1343
1344         smsc75xx_set_feature(dev, USB_DEVICE_REMOTE_WAKEUP);
1345
1346         return 0;
1347 }
1348
1349 static int smsc75xx_resume(struct usb_interface *intf)
1350 {
1351         struct usbnet *dev = usb_get_intfdata(intf);
1352         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1353         int ret;
1354         u32 val;
1355
1356         if (pdata->wolopts) {
1357                 netdev_info(dev->net, "resuming from SUSPEND0");
1358
1359                 smsc75xx_clear_feature(dev, USB_DEVICE_REMOTE_WAKEUP);
1360
1361                 /* Disable wakeup sources */
1362                 ret = smsc75xx_read_reg(dev, WUCSR, &val);
1363                 check_warn_return(ret, "Error reading WUCSR");
1364
1365                 val &= ~(WUCSR_WUEN | WUCSR_MPEN | WUCSR_PFDA_EN
1366                         | WUCSR_BCST_EN);
1367
1368                 ret = smsc75xx_write_reg(dev, WUCSR, val);
1369                 check_warn_return(ret, "Error writing WUCSR");
1370
1371                 /* clear wake-up status */
1372                 ret = smsc75xx_read_reg(dev, PMT_CTL, &val);
1373                 check_warn_return(ret, "Error reading PMT_CTL");
1374
1375                 val &= ~PMT_CTL_WOL_EN;
1376                 val |= PMT_CTL_WUPS;
1377
1378                 ret = smsc75xx_write_reg(dev, PMT_CTL, val);
1379                 check_warn_return(ret, "Error writing PMT_CTL");
1380         } else {
1381                 netdev_info(dev->net, "resuming from SUSPEND2");
1382
1383                 ret = smsc75xx_read_reg(dev, PMT_CTL, &val);
1384                 check_warn_return(ret, "Error reading PMT_CTL");
1385
1386                 val |= PMT_CTL_PHY_PWRUP;
1387
1388                 ret = smsc75xx_write_reg(dev, PMT_CTL, val);
1389                 check_warn_return(ret, "Error writing PMT_CTL");
1390         }
1391
1392         ret = smsc75xx_wait_ready(dev);
1393         check_warn_return(ret, "device not ready in smsc75xx_resume");
1394
1395         return usbnet_resume(intf);
1396 }
1397
1398 static void smsc75xx_rx_csum_offload(struct usbnet *dev, struct sk_buff *skb,
1399                                      u32 rx_cmd_a, u32 rx_cmd_b)
1400 {
1401         if (!(dev->net->features & NETIF_F_RXCSUM) ||
1402             unlikely(rx_cmd_a & RX_CMD_A_LCSM)) {
1403                 skb->ip_summed = CHECKSUM_NONE;
1404         } else {
1405                 skb->csum = ntohs((u16)(rx_cmd_b >> RX_CMD_B_CSUM_SHIFT));
1406                 skb->ip_summed = CHECKSUM_COMPLETE;
1407         }
1408 }
1409
1410 static int smsc75xx_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
1411 {
1412         while (skb->len > 0) {
1413                 u32 rx_cmd_a, rx_cmd_b, align_count, size;
1414                 struct sk_buff *ax_skb;
1415                 unsigned char *packet;
1416
1417                 memcpy(&rx_cmd_a, skb->data, sizeof(rx_cmd_a));
1418                 le32_to_cpus(&rx_cmd_a);
1419                 skb_pull(skb, 4);
1420
1421                 memcpy(&rx_cmd_b, skb->data, sizeof(rx_cmd_b));
1422                 le32_to_cpus(&rx_cmd_b);
1423                 skb_pull(skb, 4 + RXW_PADDING);
1424
1425                 packet = skb->data;
1426
1427                 /* get the packet length */
1428                 size = (rx_cmd_a & RX_CMD_A_LEN) - RXW_PADDING;
1429                 align_count = (4 - ((size + RXW_PADDING) % 4)) % 4;
1430
1431                 if (unlikely(rx_cmd_a & RX_CMD_A_RED)) {
1432                         netif_dbg(dev, rx_err, dev->net,
1433                                 "Error rx_cmd_a=0x%08x", rx_cmd_a);
1434                         dev->net->stats.rx_errors++;
1435                         dev->net->stats.rx_dropped++;
1436
1437                         if (rx_cmd_a & RX_CMD_A_FCS)
1438                                 dev->net->stats.rx_crc_errors++;
1439                         else if (rx_cmd_a & (RX_CMD_A_LONG | RX_CMD_A_RUNT))
1440                                 dev->net->stats.rx_frame_errors++;
1441                 } else {
1442                         /* ETH_FRAME_LEN + 4(CRC) + 2(COE) + 4(Vlan) */
1443                         if (unlikely(size > (ETH_FRAME_LEN + 12))) {
1444                                 netif_dbg(dev, rx_err, dev->net,
1445                                         "size err rx_cmd_a=0x%08x", rx_cmd_a);
1446                                 return 0;
1447                         }
1448
1449                         /* last frame in this batch */
1450                         if (skb->len == size) {
1451                                 smsc75xx_rx_csum_offload(dev, skb, rx_cmd_a,
1452                                         rx_cmd_b);
1453
1454                                 skb_trim(skb, skb->len - 4); /* remove fcs */
1455                                 skb->truesize = size + sizeof(struct sk_buff);
1456
1457                                 return 1;
1458                         }
1459
1460                         ax_skb = skb_clone(skb, GFP_ATOMIC);
1461                         if (unlikely(!ax_skb)) {
1462                                 netdev_warn(dev->net, "Error allocating skb");
1463                                 return 0;
1464                         }
1465
1466                         ax_skb->len = size;
1467                         ax_skb->data = packet;
1468                         skb_set_tail_pointer(ax_skb, size);
1469
1470                         smsc75xx_rx_csum_offload(dev, ax_skb, rx_cmd_a,
1471                                 rx_cmd_b);
1472
1473                         skb_trim(ax_skb, ax_skb->len - 4); /* remove fcs */
1474                         ax_skb->truesize = size + sizeof(struct sk_buff);
1475
1476                         usbnet_skb_return(dev, ax_skb);
1477                 }
1478
1479                 skb_pull(skb, size);
1480
1481                 /* padding bytes before the next frame starts */
1482                 if (skb->len)
1483                         skb_pull(skb, align_count);
1484         }
1485
1486         if (unlikely(skb->len < 0)) {
1487                 netdev_warn(dev->net, "invalid rx length<0 %d", skb->len);
1488                 return 0;
1489         }
1490
1491         return 1;
1492 }
1493
1494 static struct sk_buff *smsc75xx_tx_fixup(struct usbnet *dev,
1495                                          struct sk_buff *skb, gfp_t flags)
1496 {
1497         u32 tx_cmd_a, tx_cmd_b;
1498
1499         skb_linearize(skb);
1500
1501         if (skb_headroom(skb) < SMSC75XX_TX_OVERHEAD) {
1502                 struct sk_buff *skb2 =
1503                         skb_copy_expand(skb, SMSC75XX_TX_OVERHEAD, 0, flags);
1504                 dev_kfree_skb_any(skb);
1505                 skb = skb2;
1506                 if (!skb)
1507                         return NULL;
1508         }
1509
1510         tx_cmd_a = (u32)(skb->len & TX_CMD_A_LEN) | TX_CMD_A_FCS;
1511
1512         if (skb->ip_summed == CHECKSUM_PARTIAL)
1513                 tx_cmd_a |= TX_CMD_A_IPE | TX_CMD_A_TPE;
1514
1515         if (skb_is_gso(skb)) {
1516                 u16 mss = max(skb_shinfo(skb)->gso_size, TX_MSS_MIN);
1517                 tx_cmd_b = (mss << TX_CMD_B_MSS_SHIFT) & TX_CMD_B_MSS;
1518
1519                 tx_cmd_a |= TX_CMD_A_LSO;
1520         } else {
1521                 tx_cmd_b = 0;
1522         }
1523
1524         skb_push(skb, 4);
1525         cpu_to_le32s(&tx_cmd_b);
1526         memcpy(skb->data, &tx_cmd_b, 4);
1527
1528         skb_push(skb, 4);
1529         cpu_to_le32s(&tx_cmd_a);
1530         memcpy(skb->data, &tx_cmd_a, 4);
1531
1532         return skb;
1533 }
1534
1535 static const struct driver_info smsc75xx_info = {
1536         .description    = "smsc75xx USB 2.0 Gigabit Ethernet",
1537         .bind           = smsc75xx_bind,
1538         .unbind         = smsc75xx_unbind,
1539         .link_reset     = smsc75xx_link_reset,
1540         .reset          = smsc75xx_reset,
1541         .rx_fixup       = smsc75xx_rx_fixup,
1542         .tx_fixup       = smsc75xx_tx_fixup,
1543         .status         = smsc75xx_status,
1544         .flags          = FLAG_ETHER | FLAG_SEND_ZLP | FLAG_LINK_INTR,
1545 };
1546
1547 static const struct usb_device_id products[] = {
1548         {
1549                 /* SMSC7500 USB Gigabit Ethernet Device */
1550                 USB_DEVICE(USB_VENDOR_ID_SMSC, USB_PRODUCT_ID_LAN7500),
1551                 .driver_info = (unsigned long) &smsc75xx_info,
1552         },
1553         {
1554                 /* SMSC7500 USB Gigabit Ethernet Device */
1555                 USB_DEVICE(USB_VENDOR_ID_SMSC, USB_PRODUCT_ID_LAN7505),
1556                 .driver_info = (unsigned long) &smsc75xx_info,
1557         },
1558         { },            /* END */
1559 };
1560 MODULE_DEVICE_TABLE(usb, products);
1561
1562 static struct usb_driver smsc75xx_driver = {
1563         .name           = SMSC_CHIPNAME,
1564         .id_table       = products,
1565         .probe          = usbnet_probe,
1566         .suspend        = smsc75xx_suspend,
1567         .resume         = smsc75xx_resume,
1568         .reset_resume   = smsc75xx_resume,
1569         .disconnect     = usbnet_disconnect,
1570         .disable_hub_initiated_lpm = 1,
1571 };
1572
1573 module_usb_driver(smsc75xx_driver);
1574
1575 MODULE_AUTHOR("Nancy Lin");
1576 MODULE_AUTHOR("Steve Glendinning <steve.glendinning@shawell.net>");
1577 MODULE_DESCRIPTION("SMSC75XX USB 2.0 Gigabit Ethernet Devices");
1578 MODULE_LICENSE("GPL");