drivers/net/usb/smsc95xx.c

   1  /***************************************************************************
   2  *
   3  * Copyright (C) 2007-2008 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, see <http://www.gnu.org/licenses/>.
  17  *
  18  *****************************************************************************/
  19
  20 #include <linux/module.h>
  21 #include <linux/kmod.h>
  22 #include <linux/netdevice.h>
  23 #include <linux/etherdevice.h>
  24 #include <linux/ethtool.h>
  25 #include <linux/mii.h>
  26 #include <linux/usb.h>
  27 #include <linux/bitrev.h>
  28 #include <linux/crc16.h>
  29 #include <linux/crc32.h>
  30 #include <linux/usb/usbnet.h>
  31 #include <linux/slab.h>
  32 #include "smsc95xx.h"
  33
  34 #define SMSC_CHIPNAME                   "smsc95xx"
  35 #define SMSC_DRIVER_VERSION             "1.0.4"
  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          (2048)
  42 #define LAN95XX_EEPROM_MAGIC            (0x9500)
  43 #define EEPROM_MAC_OFFSET               (0x01)
  44 #define DEFAULT_TX_CSUM_ENABLE          (true)
  45 #define DEFAULT_RX_CSUM_ENABLE          (true)
  46 #define SMSC95XX_INTERNAL_PHY_ID        (1)
  47 #define SMSC95XX_TX_OVERHEAD            (8)
  48 #define SMSC95XX_TX_OVERHEAD_CSUM       (12)
  49 #define SUPPORTED_WAKE                  (WAKE_PHY | WAKE_UCAST | WAKE_BCAST | \
  50                                          WAKE_MCAST | WAKE_ARP | WAKE_MAGIC)
  51
  52 #define FEATURE_8_WAKEUP_FILTERS        (0x01)
  53 #define FEATURE_PHY_NLP_CROSSOVER       (0x02)
  54 #define FEATURE_REMOTE_WAKEUP           (0x04)
  55
  56 #define SUSPEND_SUSPEND0                (0x01)
  57 #define SUSPEND_SUSPEND1                (0x02)
  58 #define SUSPEND_SUSPEND2                (0x04)
  59 #define SUSPEND_SUSPEND3                (0x08)
  60 #define SUSPEND_ALLMODES                (SUSPEND_SUSPEND0 | SUSPEND_SUSPEND1 | \
  61                                          SUSPEND_SUSPEND2 | SUSPEND_SUSPEND3)
  62
  63 struct smsc95xx_priv {
  64         u32 mac_cr;
  65         u32 hash_hi;
  66         u32 hash_lo;
  67         u32 wolopts;
  68         spinlock_t mac_cr_lock;
  69         u8 features;
  70         u8 suspend_flags;
  71 };
  72
  73 static bool turbo_mode = true;
  74 module_param(turbo_mode, bool, 0644);
  75 MODULE_PARM_DESC(turbo_mode, "Enable multiple frames per Rx transaction");
  76
  77 static int __must_check __smsc95xx_read_reg(struct usbnet *dev, u32 index,
  78                                             u32 *data, int in_pm)
  79 {
  80         u32 buf;
  81         int ret;
  82         int (*fn)(struct usbnet *, u8, u8, u16, u16, void *, u16);
  83
  84         BUG_ON(!dev);
  85
  86         if (!in_pm)
  87                 fn = usbnet_read_cmd;
  88         else
  89                 fn = usbnet_read_cmd_nopm;
  90
  91         ret = fn(dev, USB_VENDOR_REQUEST_READ_REGISTER, USB_DIR_IN
  92                  | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
  93                  0, index, &buf, 4);
  94         if (unlikely(ret < 0))
  95                 netdev_warn(dev->net, "Failed to read reg index 0x%08x: %d\n",
  96                             index, ret);
  97
  98         le32_to_cpus(&buf);
  99         *data = buf;
 100
 101         return ret;
 102 }
 103
 104 static int __must_check __smsc95xx_write_reg(struct usbnet *dev, u32 index,
 105                                              u32 data, int in_pm)
 106 {
 107         u32 buf;
 108         int ret;
 109         int (*fn)(struct usbnet *, u8, u8, u16, u16, const void *, u16);
 110
 111         BUG_ON(!dev);
 112
 113         if (!in_pm)
 114                 fn = usbnet_write_cmd;
 115         else
 116                 fn = usbnet_write_cmd_nopm;
 117
 118         buf = data;
 119         cpu_to_le32s(&buf);
 120
 121         ret = fn(dev, USB_VENDOR_REQUEST_WRITE_REGISTER, USB_DIR_OUT
 122                  | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 123                  0, index, &buf, 4);
 124         if (unlikely(ret < 0))
 125                 netdev_warn(dev->net, "Failed to write reg index 0x%08x: %d\n",
 126                             index, ret);
 127
 128         return ret;
 129 }
 130
 131 static int __must_check smsc95xx_read_reg_nopm(struct usbnet *dev, u32 index,
 132                                                u32 *data)
 133 {
 134         return __smsc95xx_read_reg(dev, index, data, 1);
 135 }
 136
 137 static int __must_check smsc95xx_write_reg_nopm(struct usbnet *dev, u32 index,
 138                                                 u32 data)
 139 {
 140         return __smsc95xx_write_reg(dev, index, data, 1);
 141 }
 142
 143 static int __must_check smsc95xx_read_reg(struct usbnet *dev, u32 index,
 144                                           u32 *data)
 145 {
 146         return __smsc95xx_read_reg(dev, index, data, 0);
 147 }
 148
 149 static int __must_check smsc95xx_write_reg(struct usbnet *dev, u32 index,
 150                                            u32 data)
 151 {
 152         return __smsc95xx_write_reg(dev, index, data, 0);
 153 }
 154
 155 /* Loop until the read is completed with timeout
 156  * called with phy_mutex held */
 157 static int __must_check __smsc95xx_phy_wait_not_busy(struct usbnet *dev,
 158                                                      int in_pm)
 159 {
 160         unsigned long start_time = jiffies;
 161         u32 val;
 162         int ret;
 163
 164         do {
 165                 ret = __smsc95xx_read_reg(dev, MII_ADDR, &val, in_pm);
 166                 if (ret < 0) {
 167                         netdev_warn(dev->net, "Error reading MII_ACCESS\n");
 168                         return ret;
 169                 }
 170
 171                 if (!(val & MII_BUSY_))
 172                         return 0;
 173         } while (!time_after(jiffies, start_time + HZ));
 174
 175         return -EIO;
 176 }
 177
 178 static int __smsc95xx_mdio_read(struct net_device *netdev, int phy_id, int idx,
 179                                 int in_pm)
 180 {
 181         struct usbnet *dev = netdev_priv(netdev);
 182         u32 val, addr;
 183         int ret;
 184
 185         mutex_lock(&dev->phy_mutex);
 186
 187         /* confirm MII not busy */
 188         ret = __smsc95xx_phy_wait_not_busy(dev, in_pm);
 189         if (ret < 0) {
 190                 netdev_warn(dev->net, "MII is busy in smsc95xx_mdio_read\n");
 191                 goto done;
 192         }
 193
 194         /* set the address, index & direction (read from PHY) */
 195         phy_id &= dev->mii.phy_id_mask;
 196         idx &= dev->mii.reg_num_mask;
 197         addr = (phy_id << 11) | (idx << 6) | MII_READ_ | MII_BUSY_;
 198         ret = __smsc95xx_write_reg(dev, MII_ADDR, addr, in_pm);
 199         if (ret < 0) {
 200                 netdev_warn(dev->net, "Error writing MII_ADDR\n");
 201                 goto done;
 202         }
 203
 204         ret = __smsc95xx_phy_wait_not_busy(dev, in_pm);
 205         if (ret < 0) {
 206                 netdev_warn(dev->net, "Timed out reading MII reg %02X\n", idx);
 207                 goto done;
 208         }
 209
 210         ret = __smsc95xx_read_reg(dev, MII_DATA, &val, in_pm);
 211         if (ret < 0) {
 212                 netdev_warn(dev->net, "Error reading MII_DATA\n");
 213                 goto done;
 214         }
 215
 216         ret = (u16)(val & 0xFFFF);
 217
 218 done:
 219         mutex_unlock(&dev->phy_mutex);
 220         return ret;
 221 }
 222
 223 static void __smsc95xx_mdio_write(struct net_device *netdev, int phy_id,
 224                                   int idx, int regval, int in_pm)
 225 {
 226         struct usbnet *dev = netdev_priv(netdev);
 227         u32 val, addr;
 228         int ret;
 229
 230         mutex_lock(&dev->phy_mutex);
 231
 232         /* confirm MII not busy */
 233         ret = __smsc95xx_phy_wait_not_busy(dev, in_pm);
 234         if (ret < 0) {
 235                 netdev_warn(dev->net, "MII is busy in smsc95xx_mdio_write\n");
 236                 goto done;
 237         }
 238
 239         val = regval;
 240         ret = __smsc95xx_write_reg(dev, MII_DATA, val, in_pm);
 241         if (ret < 0) {
 242                 netdev_warn(dev->net, "Error writing MII_DATA\n");
 243                 goto done;
 244         }
 245
 246         /* set the address, index & direction (write to PHY) */
 247         phy_id &= dev->mii.phy_id_mask;
 248         idx &= dev->mii.reg_num_mask;
 249         addr = (phy_id << 11) | (idx << 6) | MII_WRITE_ | MII_BUSY_;
 250         ret = __smsc95xx_write_reg(dev, MII_ADDR, addr, in_pm);
 251         if (ret < 0) {
 252                 netdev_warn(dev->net, "Error writing MII_ADDR\n");
 253                 goto done;
 254         }
 255
 256         ret = __smsc95xx_phy_wait_not_busy(dev, in_pm);
 257         if (ret < 0) {
 258                 netdev_warn(dev->net, "Timed out writing MII reg %02X\n", idx);
 259                 goto done;
 260         }
 261
 262 done:
 263         mutex_unlock(&dev->phy_mutex);
 264 }
 265
 266 static int smsc95xx_mdio_read_nopm(struct net_device *netdev, int phy_id,
 267                                    int idx)
 268 {
 269         return __smsc95xx_mdio_read(netdev, phy_id, idx, 1);
 270 }
 271
 272 static void smsc95xx_mdio_write_nopm(struct net_device *netdev, int phy_id,
 273                                      int idx, int regval)
 274 {
 275         __smsc95xx_mdio_write(netdev, phy_id, idx, regval, 1);
 276 }
 277
 278 static int smsc95xx_mdio_read(struct net_device *netdev, int phy_id, int idx)
 279 {
 280         return __smsc95xx_mdio_read(netdev, phy_id, idx, 0);
 281 }
 282
 283 static void smsc95xx_mdio_write(struct net_device *netdev, int phy_id, int idx,
 284                                 int regval)
 285 {
 286         __smsc95xx_mdio_write(netdev, phy_id, idx, regval, 0);
 287 }
 288
 289 static int __must_check smsc95xx_wait_eeprom(struct usbnet *dev)
 290 {
 291         unsigned long start_time = jiffies;
 292         u32 val;
 293         int ret;
 294
 295         do {
 296                 ret = smsc95xx_read_reg(dev, E2P_CMD, &val);
 297                 if (ret < 0) {
 298                         netdev_warn(dev->net, "Error reading E2P_CMD\n");
 299                         return ret;
 300                 }
 301
 302                 if (!(val & E2P_CMD_BUSY_) || (val & E2P_CMD_TIMEOUT_))
 303                         break;
 304                 udelay(40);
 305         } while (!time_after(jiffies, start_time + HZ));
 306
 307         if (val & (E2P_CMD_TIMEOUT_ | E2P_CMD_BUSY_)) {
 308                 netdev_warn(dev->net, "EEPROM read operation timeout\n");
 309                 return -EIO;
 310         }
 311
 312         return 0;
 313 }
 314
 315 static int __must_check smsc95xx_eeprom_confirm_not_busy(struct usbnet *dev)
 316 {
 317         unsigned long start_time = jiffies;
 318         u32 val;
 319         int ret;
 320
 321         do {
 322                 ret = smsc95xx_read_reg(dev, E2P_CMD, &val);
 323                 if (ret < 0) {
 324                         netdev_warn(dev->net, "Error reading E2P_CMD\n");
 325                         return ret;
 326                 }
 327
 328                 if (!(val & E2P_CMD_BUSY_))
 329                         return 0;
 330
 331                 udelay(40);
 332         } while (!time_after(jiffies, start_time + HZ));
 333
 334         netdev_warn(dev->net, "EEPROM is busy\n");
 335         return -EIO;
 336 }
 337
 338 static int smsc95xx_read_eeprom(struct usbnet *dev, u32 offset, u32 length,
 339                                 u8 *data)
 340 {
 341         u32 val;
 342         int i, ret;
 343
 344         BUG_ON(!dev);
 345         BUG_ON(!data);
 346
 347         ret = smsc95xx_eeprom_confirm_not_busy(dev);
 348         if (ret)
 349                 return ret;
 350
 351         for (i = 0; i < length; i++) {
 352                 val = E2P_CMD_BUSY_ | E2P_CMD_READ_ | (offset & E2P_CMD_ADDR_);
 353                 ret = smsc95xx_write_reg(dev, E2P_CMD, val);
 354                 if (ret < 0) {
 355                         netdev_warn(dev->net, "Error writing E2P_CMD\n");
 356                         return ret;
 357                 }
 358
 359                 ret = smsc95xx_wait_eeprom(dev);
 360                 if (ret < 0)
 361                         return ret;
 362
 363                 ret = smsc95xx_read_reg(dev, E2P_DATA, &val);
 364                 if (ret < 0) {
 365                         netdev_warn(dev->net, "Error reading E2P_DATA\n");
 366                         return ret;
 367                 }
 368
 369                 data[i] = val & 0xFF;
 370                 offset++;
 371         }
 372
 373         return 0;
 374 }
 375
 376 static int smsc95xx_write_eeprom(struct usbnet *dev, u32 offset, u32 length,
 377                                  u8 *data)
 378 {
 379         u32 val;
 380         int i, ret;
 381
 382         BUG_ON(!dev);
 383         BUG_ON(!data);
 384
 385         ret = smsc95xx_eeprom_confirm_not_busy(dev);
 386         if (ret)
 387                 return ret;
 388
 389         /* Issue write/erase enable command */
 390         val = E2P_CMD_BUSY_ | E2P_CMD_EWEN_;
 391         ret = smsc95xx_write_reg(dev, E2P_CMD, val);
 392         if (ret < 0) {
 393                 netdev_warn(dev->net, "Error writing E2P_DATA\n");
 394                 return ret;
 395         }
 396
 397         ret = smsc95xx_wait_eeprom(dev);
 398         if (ret < 0)
 399                 return ret;
 400
 401         for (i = 0; i < length; i++) {
 402
 403                 /* Fill data register */
 404                 val = data[i];
 405                 ret = smsc95xx_write_reg(dev, E2P_DATA, val);
 406                 if (ret < 0) {
 407                         netdev_warn(dev->net, "Error writing E2P_DATA\n");
 408                         return ret;
 409                 }
 410
 411                 /* Send "write" command */
 412                 val = E2P_CMD_BUSY_ | E2P_CMD_WRITE_ | (offset & E2P_CMD_ADDR_);
 413                 ret = smsc95xx_write_reg(dev, E2P_CMD, val);
 414                 if (ret < 0) {
 415                         netdev_warn(dev->net, "Error writing E2P_CMD\n");
 416                         return ret;
 417                 }
 418
 419                 ret = smsc95xx_wait_eeprom(dev);
 420                 if (ret < 0)
 421                         return ret;
 422
 423                 offset++;
 424         }
 425
 426         return 0;
 427 }
 428
 429 static int __must_check smsc95xx_write_reg_async(struct usbnet *dev, u16 index,
 430                                                  u32 data)
 431 {
 432         const u16 size = 4;
 433         u32 buf;
 434         int ret;
 435
 436         buf = data;
 437         cpu_to_le32s(&buf);
 438
 439         ret = usbnet_write_cmd_async(dev, USB_VENDOR_REQUEST_WRITE_REGISTER,
 440                                      USB_DIR_OUT | USB_TYPE_VENDOR |
 441                                      USB_RECIP_DEVICE,
 442                                      0, index, &buf, size);
 443         if (ret < 0)
 444                 netdev_warn(dev->net, "Error write async cmd, sts=%d\n",
 445                             ret);
 446         return ret;
 447 }
 448
 449 /* returns hash bit number for given MAC address
 450  * example:
 451  * 01 00 5E 00 00 01 -> returns bit number 31 */
 452 static unsigned int smsc95xx_hash(char addr[ETH_ALEN])
 453 {
 454         return (ether_crc(ETH_ALEN, addr) >> 26) & 0x3f;
 455 }
 456
 457 static void smsc95xx_set_multicast(struct net_device *netdev)
 458 {
 459         struct usbnet *dev = netdev_priv(netdev);
 460         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
 461         unsigned long flags;
 462         int ret;
 463
 464         pdata->hash_hi = 0;
 465         pdata->hash_lo = 0;
 466
 467         spin_lock_irqsave(&pdata->mac_cr_lock, flags);
 468
 469         if (dev->net->flags & IFF_PROMISC) {
 470                 netif_dbg(dev, drv, dev->net, "promiscuous mode enabled\n");
 471                 pdata->mac_cr |= MAC_CR_PRMS_;
 472                 pdata->mac_cr &= ~(MAC_CR_MCPAS_ | MAC_CR_HPFILT_);
 473         } else if (dev->net->flags & IFF_ALLMULTI) {
 474                 netif_dbg(dev, drv, dev->net, "receive all multicast enabled\n");
 475                 pdata->mac_cr |= MAC_CR_MCPAS_;
 476                 pdata->mac_cr &= ~(MAC_CR_PRMS_ | MAC_CR_HPFILT_);
 477         } else if (!netdev_mc_empty(dev->net)) {
 478                 struct netdev_hw_addr *ha;
 479
 480                 pdata->mac_cr |= MAC_CR_HPFILT_;
 481                 pdata->mac_cr &= ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_);
 482
 483                 netdev_for_each_mc_addr(ha, netdev) {
 484                         u32 bitnum = smsc95xx_hash(ha->addr);
 485                         u32 mask = 0x01 << (bitnum & 0x1F);
 486                         if (bitnum & 0x20)
 487                                 pdata->hash_hi |= mask;
 488                         else
 489                                 pdata->hash_lo |= mask;
 490                 }
 491
 492                 netif_dbg(dev, drv, dev->net, "HASHH=0x%08X, HASHL=0x%08X\n",
 493                                    pdata->hash_hi, pdata->hash_lo);
 494         } else {
 495                 netif_dbg(dev, drv, dev->net, "receive own packets only\n");
 496                 pdata->mac_cr &=
 497                         ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_ | MAC_CR_HPFILT_);
 498         }
 499
 500         spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
 501
 502         /* Initiate async writes, as we can't wait for completion here */
 503         ret = smsc95xx_write_reg_async(dev, HASHH, pdata->hash_hi);
 504         if (ret < 0)
 505                 netdev_warn(dev->net, "failed to initiate async write to HASHH\n");
 506
 507         ret = smsc95xx_write_reg_async(dev, HASHL, pdata->hash_lo);
 508         if (ret < 0)
 509                 netdev_warn(dev->net, "failed to initiate async write to HASHL\n");
 510
 511         ret = smsc95xx_write_reg_async(dev, MAC_CR, pdata->mac_cr);
 512         if (ret < 0)
 513                 netdev_warn(dev->net, "failed to initiate async write to MAC_CR\n");
 514 }
 515
 516 static int smsc95xx_phy_update_flowcontrol(struct usbnet *dev, u8 duplex,
 517                                            u16 lcladv, u16 rmtadv)
 518 {
 519         u32 flow, afc_cfg = 0;
 520
 521         int ret = smsc95xx_read_reg(dev, AFC_CFG, &afc_cfg);
 522         if (ret < 0)
 523                 return ret;
 524
 525         if (duplex == DUPLEX_FULL) {
 526                 u8 cap = mii_resolve_flowctrl_fdx(lcladv, rmtadv);
 527
 528                 if (cap & FLOW_CTRL_RX)
 529                         flow = 0xFFFF0002;
 530                 else
 531                         flow = 0;
 532
 533                 if (cap & FLOW_CTRL_TX)
 534                         afc_cfg |= 0xF;
 535                 else
 536                         afc_cfg &= ~0xF;
 537
 538                 netif_dbg(dev, link, dev->net, "rx pause %s, tx pause %s\n",
 539                                    cap & FLOW_CTRL_RX ? "enabled" : "disabled",
 540                                    cap & FLOW_CTRL_TX ? "enabled" : "disabled");
 541         } else {
 542                 netif_dbg(dev, link, dev->net, "half duplex\n");
 543                 flow = 0;
 544                 afc_cfg |= 0xF;
 545         }
 546
 547         ret = smsc95xx_write_reg(dev, FLOW, flow);
 548         if (ret < 0)
 549                 return ret;
 550
 551         return smsc95xx_write_reg(dev, AFC_CFG, afc_cfg);
 552 }
 553
 554 static int smsc95xx_link_reset(struct usbnet *dev)
 555 {
 556         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
 557         struct mii_if_info *mii = &dev->mii;
 558         struct ethtool_cmd ecmd = { .cmd = ETHTOOL_GSET };
 559         unsigned long flags;
 560         u16 lcladv, rmtadv;
 561         int ret;
 562
 563         /* clear interrupt status */
 564         ret = smsc95xx_mdio_read(dev->net, mii->phy_id, PHY_INT_SRC);
 565         if (ret < 0)
 566                 return ret;
 567
 568         ret = smsc95xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL_);
 569         if (ret < 0)
 570                 return ret;
 571
 572         mii_check_media(mii, 1, 1);
 573         mii_ethtool_gset(&dev->mii, &ecmd);
 574         lcladv = smsc95xx_mdio_read(dev->net, mii->phy_id, MII_ADVERTISE);
 575         rmtadv = smsc95xx_mdio_read(dev->net, mii->phy_id, MII_LPA);
 576
 577         netif_dbg(dev, link, dev->net,
 578                   "speed: %u duplex: %d lcladv: %04x rmtadv: %04x\n",
 579                   ethtool_cmd_speed(&ecmd), ecmd.duplex, lcladv, rmtadv);
 580
 581         spin_lock_irqsave(&pdata->mac_cr_lock, flags);
 582         if (ecmd.duplex != DUPLEX_FULL) {
 583                 pdata->mac_cr &= ~MAC_CR_FDPX_;
 584                 pdata->mac_cr |= MAC_CR_RCVOWN_;
 585         } else {
 586                 pdata->mac_cr &= ~MAC_CR_RCVOWN_;
 587                 pdata->mac_cr |= MAC_CR_FDPX_;
 588         }
 589         spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
 590
 591         ret = smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr);
 592         if (ret < 0)
 593                 return ret;
 594
 595         ret = smsc95xx_phy_update_flowcontrol(dev, ecmd.duplex, lcladv, rmtadv);
 596         if (ret < 0)
 597                 netdev_warn(dev->net, "Error updating PHY flow control\n");
 598
 599         return ret;
 600 }
 601
 602 static void smsc95xx_status(struct usbnet *dev, struct urb *urb)
 603 {
 604         u32 intdata;
 605
 606         if (urb->actual_length != 4) {
 607                 netdev_warn(dev->net, "unexpected urb length %d\n",
 608                             urb->actual_length);
 609                 return;
 610         }
 611
 612         memcpy(&intdata, urb->transfer_buffer, 4);
 613         le32_to_cpus(&intdata);
 614
 615         netif_dbg(dev, link, dev->net, "intdata: 0x%08X\n", intdata);
 616
 617         if (intdata & INT_ENP_PHY_INT_)
 618                 usbnet_defer_kevent(dev, EVENT_LINK_RESET);
 619         else
 620                 netdev_warn(dev->net, "unexpected interrupt, intdata=0x%08X\n",
 621                             intdata);
 622 }
 623
 624 /* Enable or disable Tx & Rx checksum offload engines */
 625 static int smsc95xx_set_features(struct net_device *netdev,
 626         netdev_features_t features)
 627 {
 628         struct usbnet *dev = netdev_priv(netdev);
 629         u32 read_buf;
 630         int ret;
 631
 632         ret = smsc95xx_read_reg(dev, COE_CR, &read_buf);
 633         if (ret < 0)
 634                 return ret;
 635
 636         if (features & NETIF_F_HW_CSUM)
 637                 read_buf |= Tx_COE_EN_;
 638         else
 639                 read_buf &= ~Tx_COE_EN_;
 640
 641         if (features & NETIF_F_RXCSUM)
 642                 read_buf |= Rx_COE_EN_;
 643         else
 644                 read_buf &= ~Rx_COE_EN_;
 645
 646         ret = smsc95xx_write_reg(dev, COE_CR, read_buf);
 647         if (ret < 0)
 648                 return ret;
 649
 650         netif_dbg(dev, hw, dev->net, "COE_CR = 0x%08x\n", read_buf);
 651         return 0;
 652 }
 653
 654 static int smsc95xx_ethtool_get_eeprom_len(struct net_device *net)
 655 {
 656         return MAX_EEPROM_SIZE;
 657 }
 658
 659 static int smsc95xx_ethtool_get_eeprom(struct net_device *netdev,
 660                                        struct ethtool_eeprom *ee, u8 *data)
 661 {
 662         struct usbnet *dev = netdev_priv(netdev);
 663
 664         ee->magic = LAN95XX_EEPROM_MAGIC;
 665
 666         return smsc95xx_read_eeprom(dev, ee->offset, ee->len, data);
 667 }
 668
 669 static int smsc95xx_ethtool_set_eeprom(struct net_device *netdev,
 670                                        struct ethtool_eeprom *ee, u8 *data)
 671 {
 672         struct usbnet *dev = netdev_priv(netdev);
 673
 674         if (ee->magic != LAN95XX_EEPROM_MAGIC) {
 675                 netdev_warn(dev->net, "EEPROM: magic value mismatch, magic = 0x%x\n",
 676                             ee->magic);
 677                 return -EINVAL;
 678         }
 679
 680         return smsc95xx_write_eeprom(dev, ee->offset, ee->len, data);
 681 }
 682
 683 static int smsc95xx_ethtool_getregslen(struct net_device *netdev)
 684 {
 685         /* all smsc95xx registers */
 686         return COE_CR - ID_REV + sizeof(u32);
 687 }
 688
 689 static void
 690 smsc95xx_ethtool_getregs(struct net_device *netdev, struct ethtool_regs *regs,
 691                          void *buf)
 692 {
 693         struct usbnet *dev = netdev_priv(netdev);
 694         unsigned int i, j;
 695         int retval;
 696         u32 *data = buf;
 697
 698         retval = smsc95xx_read_reg(dev, ID_REV, &regs->version);
 699         if (retval < 0) {
 700                 netdev_warn(netdev, "REGS: cannot read ID_REV\n");
 701                 return;
 702         }
 703
 704         for (i = ID_REV, j = 0; i <= COE_CR; i += (sizeof(u32)), j++) {
 705                 retval = smsc95xx_read_reg(dev, i, &data[j]);
 706                 if (retval < 0) {
 707                         netdev_warn(netdev, "REGS: cannot read reg[%x]\n", i);
 708                         return;
 709                 }
 710         }
 711 }
 712
 713 static void smsc95xx_ethtool_get_wol(struct net_device *net,
 714                                      struct ethtool_wolinfo *wolinfo)
 715 {
 716         struct usbnet *dev = netdev_priv(net);
 717         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
 718
 719         wolinfo->supported = SUPPORTED_WAKE;
 720         wolinfo->wolopts = pdata->wolopts;
 721 }
 722
 723 static int smsc95xx_ethtool_set_wol(struct net_device *net,
 724                                     struct ethtool_wolinfo *wolinfo)
 725 {
 726         struct usbnet *dev = netdev_priv(net);
 727         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
 728         int ret;
 729
 730         pdata->wolopts = wolinfo->wolopts & SUPPORTED_WAKE;
 731
 732         ret = device_set_wakeup_enable(&dev->udev->dev, pdata->wolopts);
 733         if (ret < 0)
 734                 netdev_warn(dev->net, "device_set_wakeup_enable error %d\n", ret);
 735
 736         return ret;
 737 }
 738
 739 static const struct ethtool_ops smsc95xx_ethtool_ops = {
 740         .get_link       = usbnet_get_link,
 741         .nway_reset     = usbnet_nway_reset,
 742         .get_drvinfo    = usbnet_get_drvinfo,
 743         .get_msglevel   = usbnet_get_msglevel,
 744         .set_msglevel   = usbnet_set_msglevel,
 745         .get_settings   = usbnet_get_settings,
 746         .set_settings   = usbnet_set_settings,
 747         .get_eeprom_len = smsc95xx_ethtool_get_eeprom_len,
 748         .get_eeprom     = smsc95xx_ethtool_get_eeprom,
 749         .set_eeprom     = smsc95xx_ethtool_set_eeprom,
 750         .get_regs_len   = smsc95xx_ethtool_getregslen,
 751         .get_regs       = smsc95xx_ethtool_getregs,
 752         .get_wol        = smsc95xx_ethtool_get_wol,
 753         .set_wol        = smsc95xx_ethtool_set_wol,
 754 };
 755
 756 static int smsc95xx_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
 757 {
 758         struct usbnet *dev = netdev_priv(netdev);
 759
 760         if (!netif_running(netdev))
 761                 return -EINVAL;
 762
 763         return generic_mii_ioctl(&dev->mii, if_mii(rq), cmd, NULL);
 764 }
 765
 766 static void smsc95xx_init_mac_address(struct usbnet *dev)
 767 {
 768         /* try reading mac address from EEPROM */
 769         if (smsc95xx_read_eeprom(dev, EEPROM_MAC_OFFSET, ETH_ALEN,
 770                         dev->net->dev_addr) == 0) {
 771                 if (is_valid_ether_addr(dev->net->dev_addr)) {
 772                         /* eeprom values are valid so use them */
 773                         netif_dbg(dev, ifup, dev->net, "MAC address read from EEPROM\n");
 774                         return;
 775                 }
 776         }
 777
 778         /* no eeprom, or eeprom values are invalid. generate random MAC */
 779         eth_hw_addr_random(dev->net);
 780         netif_dbg(dev, ifup, dev->net, "MAC address set to eth_random_addr\n");
 781 }
 782
 783 static int smsc95xx_set_mac_address(struct usbnet *dev)
 784 {
 785         u32 addr_lo = dev->net->dev_addr[0] | dev->net->dev_addr[1] << 8 |
 786                 dev->net->dev_addr[2] << 16 | dev->net->dev_addr[3] << 24;
 787         u32 addr_hi = dev->net->dev_addr[4] | dev->net->dev_addr[5] << 8;
 788         int ret;
 789
 790         ret = smsc95xx_write_reg(dev, ADDRL, addr_lo);
 791         if (ret < 0)
 792                 return ret;
 793
 794         return smsc95xx_write_reg(dev, ADDRH, addr_hi);
 795 }
 796
 797 /* starts the TX path */
 798 static int smsc95xx_start_tx_path(struct usbnet *dev)
 799 {
 800         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
 801         unsigned long flags;
 802         int ret;
 803
 804         /* Enable Tx at MAC */
 805         spin_lock_irqsave(&pdata->mac_cr_lock, flags);
 806         pdata->mac_cr |= MAC_CR_TXEN_;
 807         spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
 808
 809         ret = smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr);
 810         if (ret < 0)
 811                 return ret;
 812
 813         /* Enable Tx at SCSRs */
 814         return smsc95xx_write_reg(dev, TX_CFG, TX_CFG_ON_);
 815 }
 816
 817 /* Starts the Receive path */
 818 static int smsc95xx_start_rx_path(struct usbnet *dev, int in_pm)
 819 {
 820         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
 821         unsigned long flags;
 822
 823         spin_lock_irqsave(&pdata->mac_cr_lock, flags);
 824         pdata->mac_cr |= MAC_CR_RXEN_;
 825         spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
 826
 827         return __smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr, in_pm);
 828 }
 829
 830 static int smsc95xx_phy_initialize(struct usbnet *dev)
 831 {
 832         int bmcr, ret, timeout = 0;
 833
 834         /* Initialize MII structure */
 835         dev->mii.dev = dev->net;
 836         dev->mii.mdio_read = smsc95xx_mdio_read;
 837         dev->mii.mdio_write = smsc95xx_mdio_write;
 838         dev->mii.phy_id_mask = 0x1f;
 839         dev->mii.reg_num_mask = 0x1f;
 840         dev->mii.phy_id = SMSC95XX_INTERNAL_PHY_ID;
 841
 842         /* reset phy and wait for reset to complete */
 843         smsc95xx_mdio_write(dev->net, dev->mii.phy_id, MII_BMCR, BMCR_RESET);
 844
 845         do {
 846                 msleep(10);
 847                 bmcr = smsc95xx_mdio_read(dev->net, dev->mii.phy_id, MII_BMCR);
 848                 timeout++;
 849         } while ((bmcr & BMCR_RESET) && (timeout < 100));
 850
 851         if (timeout >= 100) {
 852                 netdev_warn(dev->net, "timeout on PHY Reset");
 853                 return -EIO;
 854         }
 855
 856         smsc95xx_mdio_write(dev->net, dev->mii.phy_id, MII_ADVERTISE,
 857                 ADVERTISE_ALL | ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP |
 858                 ADVERTISE_PAUSE_ASYM);
 859
 860         /* read to clear */
 861         ret = smsc95xx_mdio_read(dev->net, dev->mii.phy_id, PHY_INT_SRC);
 862         if (ret < 0) {
 863                 netdev_warn(dev->net, "Failed to read PHY_INT_SRC during init\n");
 864                 return ret;
 865         }
 866
 867         smsc95xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_MASK,
 868                 PHY_INT_MASK_DEFAULT_);
 869         mii_nway_restart(&dev->mii);
 870
 871         netif_dbg(dev, ifup, dev->net, "phy initialised successfully\n");
 872         return 0;
 873 }
 874
 875 static int smsc95xx_reset(struct usbnet *dev)
 876 {
 877         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
 878         u32 read_buf, write_buf, burst_cap;
 879         int ret = 0, timeout;
 880
 881         netif_dbg(dev, ifup, dev->net, "entering smsc95xx_reset\n");
 882
 883         ret = smsc95xx_write_reg(dev, HW_CFG, HW_CFG_LRST_);
 884         if (ret < 0)
 885                 return ret;
 886
 887         timeout = 0;
 888         do {
 889                 msleep(10);
 890                 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
 891                 if (ret < 0)
 892                         return ret;
 893                 timeout++;
 894         } while ((read_buf & HW_CFG_LRST_) && (timeout < 100));
 895
 896         if (timeout >= 100) {
 897                 netdev_warn(dev->net, "timeout waiting for completion of Lite Reset\n");
 898                 return ret;
 899         }
 900
 901         ret = smsc95xx_write_reg(dev, PM_CTRL, PM_CTL_PHY_RST_);
 902         if (ret < 0)
 903                 return ret;
 904
 905         timeout = 0;
 906         do {
 907                 msleep(10);
 908                 ret = smsc95xx_read_reg(dev, PM_CTRL, &read_buf);
 909                 if (ret < 0)
 910                         return ret;
 911                 timeout++;
 912         } while ((read_buf & PM_CTL_PHY_RST_) && (timeout < 100));
 913
 914         if (timeout >= 100) {
 915                 netdev_warn(dev->net, "timeout waiting for PHY Reset\n");
 916                 return ret;
 917         }
 918
 919         ret = smsc95xx_set_mac_address(dev);
 920         if (ret < 0)
 921                 return ret;
 922
 923         netif_dbg(dev, ifup, dev->net, "MAC Address: %pM\n",
 924                   dev->net->dev_addr);
 925
 926         ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
 927         if (ret < 0)
 928                 return ret;
 929
 930         netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG : 0x%08x\n",
 931                   read_buf);
 932
 933         read_buf |= HW_CFG_BIR_;
 934
 935         ret = smsc95xx_write_reg(dev, HW_CFG, read_buf);
 936         if (ret < 0)
 937                 return ret;
 938
 939         ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
 940         if (ret < 0)
 941                 return ret;
 942
 943         netif_dbg(dev, ifup, dev->net,
 944                   "Read Value from HW_CFG after writing HW_CFG_BIR_: 0x%08x\n",
 945                   read_buf);
 946
 947         if (!turbo_mode) {
 948                 burst_cap = 0;
 949                 dev->rx_urb_size = MAX_SINGLE_PACKET_SIZE;
 950         } else if (dev->udev->speed == USB_SPEED_HIGH) {
 951                 burst_cap = DEFAULT_HS_BURST_CAP_SIZE / HS_USB_PKT_SIZE;
 952                 dev->rx_urb_size = DEFAULT_HS_BURST_CAP_SIZE;
 953         } else {
 954                 burst_cap = DEFAULT_FS_BURST_CAP_SIZE / FS_USB_PKT_SIZE;
 955                 dev->rx_urb_size = DEFAULT_FS_BURST_CAP_SIZE;
 956         }
 957
 958         netif_dbg(dev, ifup, dev->net, "rx_urb_size=%ld\n",
 959                   (ulong)dev->rx_urb_size);
 960
 961         ret = smsc95xx_write_reg(dev, BURST_CAP, burst_cap);
 962         if (ret < 0)
 963                 return ret;
 964
 965         ret = smsc95xx_read_reg(dev, BURST_CAP, &read_buf);
 966         if (ret < 0)
 967                 return ret;
 968
 969         netif_dbg(dev, ifup, dev->net,
 970                   "Read Value from BURST_CAP after writing: 0x%08x\n",
 971                   read_buf);
 972
 973         ret = smsc95xx_write_reg(dev, BULK_IN_DLY, DEFAULT_BULK_IN_DELAY);
 974         if (ret < 0)
 975                 return ret;
 976
 977         ret = smsc95xx_read_reg(dev, BULK_IN_DLY, &read_buf);
 978         if (ret < 0)
 979                 return ret;
 980
 981         netif_dbg(dev, ifup, dev->net,
 982                   "Read Value from BULK_IN_DLY after writing: 0x%08x\n",
 983                   read_buf);
 984
 985         ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
 986         if (ret < 0)
 987                 return ret;
 988
 989         netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG: 0x%08x\n",
 990                   read_buf);
 991
 992         if (turbo_mode)
 993                 read_buf |= (HW_CFG_MEF_ | HW_CFG_BCE_);
 994
 995         read_buf &= ~HW_CFG_RXDOFF_;
 996
 997         /* set Rx data offset=2, Make IP header aligns on word boundary. */
 998         read_buf |= NET_IP_ALIGN << 9;
 999
1000         ret = smsc95xx_write_reg(dev, HW_CFG, read_buf);
1001         if (ret < 0)
1002                 return ret;
1003
1004         ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
1005         if (ret < 0)
1006                 return ret;
1007
1008         netif_dbg(dev, ifup, dev->net,
1009                   "Read Value from HW_CFG after writing: 0x%08x\n", read_buf);
1010
1011         ret = smsc95xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL_);
1012         if (ret < 0)
1013                 return ret;
1014
1015         ret = smsc95xx_read_reg(dev, ID_REV, &read_buf);
1016         if (ret < 0)
1017                 return ret;
1018         netif_dbg(dev, ifup, dev->net, "ID_REV = 0x%08x\n", read_buf);
1019
1020         /* Configure GPIO pins as LED outputs */
1021         write_buf = LED_GPIO_CFG_SPD_LED | LED_GPIO_CFG_LNK_LED |
1022                 LED_GPIO_CFG_FDX_LED;
1023         ret = smsc95xx_write_reg(dev, LED_GPIO_CFG, write_buf);
1024         if (ret < 0)
1025                 return ret;
1026
1027         /* Init Tx */
1028         ret = smsc95xx_write_reg(dev, FLOW, 0);
1029         if (ret < 0)
1030                 return ret;
1031
1032         ret = smsc95xx_write_reg(dev, AFC_CFG, AFC_CFG_DEFAULT);
1033         if (ret < 0)
1034                 return ret;
1035
1036         /* Don't need mac_cr_lock during initialisation */
1037         ret = smsc95xx_read_reg(dev, MAC_CR, &pdata->mac_cr);
1038         if (ret < 0)
1039                 return ret;
1040
1041         /* Init Rx */
1042         /* Set Vlan */
1043         ret = smsc95xx_write_reg(dev, VLAN1, (u32)ETH_P_8021Q);
1044         if (ret < 0)
1045                 return ret;
1046
1047         /* Enable or disable checksum offload engines */
1048         ret = smsc95xx_set_features(dev->net, dev->net->features);
1049         if (ret < 0) {
1050                 netdev_warn(dev->net, "Failed to set checksum offload features\n");
1051                 return ret;
1052         }
1053
1054         smsc95xx_set_multicast(dev->net);
1055
1056         ret = smsc95xx_phy_initialize(dev);
1057         if (ret < 0) {
1058                 netdev_warn(dev->net, "Failed to init PHY\n");
1059                 return ret;
1060         }
1061
1062         ret = smsc95xx_read_reg(dev, INT_EP_CTL, &read_buf);
1063         if (ret < 0)
1064                 return ret;
1065
1066         /* enable PHY interrupts */
1067         read_buf |= INT_EP_CTL_PHY_INT_;
1068
1069         ret = smsc95xx_write_reg(dev, INT_EP_CTL, read_buf);
1070         if (ret < 0)
1071                 return ret;
1072
1073         ret = smsc95xx_start_tx_path(dev);
1074         if (ret < 0) {
1075                 netdev_warn(dev->net, "Failed to start TX path\n");
1076                 return ret;
1077         }
1078
1079         ret = smsc95xx_start_rx_path(dev, 0);
1080         if (ret < 0) {
1081                 netdev_warn(dev->net, "Failed to start RX path\n");
1082                 return ret;
1083         }
1084
1085         netif_dbg(dev, ifup, dev->net, "smsc95xx_reset, return 0\n");
1086         return 0;
1087 }
1088
1089 static const struct net_device_ops smsc95xx_netdev_ops = {
1090         .ndo_open               = usbnet_open,
1091         .ndo_stop               = usbnet_stop,
1092         .ndo_start_xmit         = usbnet_start_xmit,
1093         .ndo_tx_timeout         = usbnet_tx_timeout,
1094         .ndo_change_mtu         = usbnet_change_mtu,
1095         .ndo_set_mac_address    = eth_mac_addr,
1096         .ndo_validate_addr      = eth_validate_addr,
1097         .ndo_do_ioctl           = smsc95xx_ioctl,
1098         .ndo_set_rx_mode        = smsc95xx_set_multicast,
1099         .ndo_set_features       = smsc95xx_set_features,
1100 };
1101
1102 static int smsc95xx_bind(struct usbnet *dev, struct usb_interface *intf)
1103 {
1104         struct smsc95xx_priv *pdata = NULL;
1105         u32 val;
1106         int ret;
1107
1108         printk(KERN_INFO SMSC_CHIPNAME " v" SMSC_DRIVER_VERSION "\n");
1109
1110         ret = usbnet_get_endpoints(dev, intf);
1111         if (ret < 0) {
1112                 netdev_warn(dev->net, "usbnet_get_endpoints failed: %d\n", ret);
1113                 return ret;
1114         }
1115
1116         dev->data[0] = (unsigned long)kzalloc(sizeof(struct smsc95xx_priv),
1117                                               GFP_KERNEL);
1118
1119         pdata = (struct smsc95xx_priv *)(dev->data[0]);
1120         if (!pdata)
1121                 return -ENOMEM;
1122
1123         spin_lock_init(&pdata->mac_cr_lock);
1124
1125         if (DEFAULT_TX_CSUM_ENABLE)
1126                 dev->net->features |= NETIF_F_HW_CSUM;
1127         if (DEFAULT_RX_CSUM_ENABLE)
1128                 dev->net->features |= NETIF_F_RXCSUM;
1129
1130         dev->net->hw_features = NETIF_F_HW_CSUM | NETIF_F_RXCSUM;
1131
1132         smsc95xx_init_mac_address(dev);
1133
1134         /* Init all registers */
1135         ret = smsc95xx_reset(dev);
1136
1137         /* detect device revision as different features may be available */
1138         ret = smsc95xx_read_reg(dev, ID_REV, &val);
1139         if (ret < 0)
1140                 return ret;
1141         val >>= 16;
1142
1143         if ((val == ID_REV_CHIP_ID_9500A_) || (val == ID_REV_CHIP_ID_9530_) ||
1144             (val == ID_REV_CHIP_ID_89530_) || (val == ID_REV_CHIP_ID_9730_))
1145                 pdata->features = (FEATURE_8_WAKEUP_FILTERS |
1146                         FEATURE_PHY_NLP_CROSSOVER |
1147                         FEATURE_REMOTE_WAKEUP);
1148         else if (val == ID_REV_CHIP_ID_9512_)
1149                 pdata->features = FEATURE_8_WAKEUP_FILTERS;
1150
1151         dev->net->netdev_ops = &smsc95xx_netdev_ops;
1152         dev->net->ethtool_ops = &smsc95xx_ethtool_ops;
1153         dev->net->flags |= IFF_MULTICAST;
1154         dev->net->hard_header_len += SMSC95XX_TX_OVERHEAD_CSUM;
1155         dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len;
1156         return 0;
1157 }
1158
1159 static void smsc95xx_unbind(struct usbnet *dev, struct usb_interface *intf)
1160 {
1161         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1162         if (pdata) {
1163                 netif_dbg(dev, ifdown, dev->net, "free pdata\n");
1164                 kfree(pdata);
1165                 pdata = NULL;
1166                 dev->data[0] = 0;
1167         }
1168 }
1169
1170 static u32 smsc_crc(const u8 *buffer, size_t len, int filter)
1171 {
1172         u32 crc = bitrev16(crc16(0xFFFF, buffer, len));
1173         return crc << ((filter % 2) * 16);
1174 }
1175
1176 static int smsc95xx_enable_phy_wakeup_interrupts(struct usbnet *dev, u16 mask)
1177 {
1178         struct mii_if_info *mii = &dev->mii;
1179         int ret;
1180
1181         netdev_dbg(dev->net, "enabling PHY wakeup interrupts\n");
1182
1183         /* read to clear */
1184         ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_SRC);
1185         if (ret < 0)
1186                 return ret;
1187
1188         /* enable interrupt source */
1189         ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_MASK);
1190         if (ret < 0)
1191                 return ret;
1192
1193         ret |= mask;
1194
1195         smsc95xx_mdio_write_nopm(dev->net, mii->phy_id, PHY_INT_MASK, ret);
1196
1197         return 0;
1198 }
1199
1200 static int smsc95xx_link_ok_nopm(struct usbnet *dev)
1201 {
1202         struct mii_if_info *mii = &dev->mii;
1203         int ret;
1204
1205         /* first, a dummy read, needed to latch some MII phys */
1206         ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR);
1207         if (ret < 0)
1208                 return ret;
1209
1210         ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR);
1211         if (ret < 0)
1212                 return ret;
1213
1214         return !!(ret & BMSR_LSTATUS);
1215 }
1216
1217 static int smsc95xx_enter_suspend0(struct usbnet *dev)
1218 {
1219         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1220         u32 val;
1221         int ret;
1222
1223         ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1224         if (ret < 0)
1225                 return ret;
1226
1227         val &= (~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_));
1228         val |= PM_CTL_SUS_MODE_0;
1229
1230         ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1231         if (ret < 0)
1232                 return ret;
1233
1234         /* clear wol status */
1235         val &= ~PM_CTL_WUPS_;
1236         val |= PM_CTL_WUPS_WOL_;
1237
1238         /* enable energy detection */
1239         if (pdata->wolopts & WAKE_PHY)
1240                 val |= PM_CTL_WUPS_ED_;
1241
1242         ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1243         if (ret < 0)
1244                 return ret;
1245
1246         /* read back PM_CTRL */
1247         ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1248         if (ret < 0)
1249                 return ret;
1250
1251         pdata->suspend_flags |= SUSPEND_SUSPEND0;
1252
1253         return 0;
1254 }
1255
1256 static int smsc95xx_enter_suspend1(struct usbnet *dev)
1257 {
1258         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1259         struct mii_if_info *mii = &dev->mii;
1260         u32 val;
1261         int ret;
1262
1263         /* reconfigure link pulse detection timing for
1264          * compatibility with non-standard link partners
1265          */
1266         if (pdata->features & FEATURE_PHY_NLP_CROSSOVER)
1267                 smsc95xx_mdio_write_nopm(dev->net, mii->phy_id, PHY_EDPD_CONFIG,
1268                         PHY_EDPD_CONFIG_DEFAULT);
1269
1270         /* enable energy detect power-down mode */
1271         ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_MODE_CTRL_STS);
1272         if (ret < 0)
1273                 return ret;
1274
1275         ret |= MODE_CTRL_STS_EDPWRDOWN_;
1276
1277         smsc95xx_mdio_write_nopm(dev->net, mii->phy_id, PHY_MODE_CTRL_STS, ret);
1278
1279         /* enter SUSPEND1 mode */
1280         ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1281         if (ret < 0)
1282                 return ret;
1283
1284         val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_);
1285         val |= PM_CTL_SUS_MODE_1;
1286
1287         ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1288         if (ret < 0)
1289                 return ret;
1290
1291         /* clear wol status, enable energy detection */
1292         val &= ~PM_CTL_WUPS_;
1293         val |= (PM_CTL_WUPS_ED_ | PM_CTL_ED_EN_);
1294
1295         ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1296         if (ret < 0)
1297                 return ret;
1298
1299         pdata->suspend_flags |= SUSPEND_SUSPEND1;
1300
1301         return 0;
1302 }
1303
1304 static int smsc95xx_enter_suspend2(struct usbnet *dev)
1305 {
1306         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1307         u32 val;
1308         int ret;
1309
1310         ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1311         if (ret < 0)
1312                 return ret;
1313
1314         val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_);
1315         val |= PM_CTL_SUS_MODE_2;
1316
1317         ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1318         if (ret < 0)
1319                 return ret;
1320
1321         pdata->suspend_flags |= SUSPEND_SUSPEND2;
1322
1323         return 0;
1324 }
1325
1326 static int smsc95xx_enter_suspend3(struct usbnet *dev)
1327 {
1328         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1329         u32 val;
1330         int ret;
1331
1332         ret = smsc95xx_read_reg_nopm(dev, RX_FIFO_INF, &val);
1333         if (ret < 0)
1334                 return ret;
1335
1336         if (val & 0xFFFF) {
1337                 netdev_info(dev->net, "rx fifo not empty in autosuspend\n");
1338                 return -EBUSY;
1339         }
1340
1341         ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1342         if (ret < 0)
1343                 return ret;
1344
1345         val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_);
1346         val |= PM_CTL_SUS_MODE_3 | PM_CTL_RES_CLR_WKP_STS;
1347
1348         ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1349         if (ret < 0)
1350                 return ret;
1351
1352         /* clear wol status */
1353         val &= ~PM_CTL_WUPS_;
1354         val |= PM_CTL_WUPS_WOL_;
1355
1356         ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1357         if (ret < 0)
1358                 return ret;
1359
1360         pdata->suspend_flags |= SUSPEND_SUSPEND3;
1361
1362         return 0;
1363 }
1364
1365 static int smsc95xx_autosuspend(struct usbnet *dev, u32 link_up)
1366 {
1367         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1368         int ret;
1369
1370         if (!netif_running(dev->net)) {
1371                 /* interface is ifconfig down so fully power down hw */
1372                 netdev_dbg(dev->net, "autosuspend entering SUSPEND2\n");
1373                 return smsc95xx_enter_suspend2(dev);
1374         }
1375
1376         if (!link_up) {
1377                 /* link is down so enter EDPD mode, but only if device can
1378                  * reliably resume from it.  This check should be redundant
1379                  * as current FEATURE_REMOTE_WAKEUP parts also support
1380                  * FEATURE_PHY_NLP_CROSSOVER but it's included for clarity */
1381                 if (!(pdata->features & FEATURE_PHY_NLP_CROSSOVER)) {
1382                         netdev_warn(dev->net, "EDPD not supported\n");
1383                         return -EBUSY;
1384                 }
1385
1386                 netdev_dbg(dev->net, "autosuspend entering SUSPEND1\n");
1387
1388                 /* enable PHY wakeup events for if cable is attached */
1389                 ret = smsc95xx_enable_phy_wakeup_interrupts(dev,
1390                         PHY_INT_MASK_ANEG_COMP_);
1391                 if (ret < 0) {
1392                         netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1393                         return ret;
1394                 }
1395
1396                 netdev_info(dev->net, "entering SUSPEND1 mode\n");
1397                 return smsc95xx_enter_suspend1(dev);
1398         }
1399
1400         /* enable PHY wakeup events so we remote wakeup if cable is pulled */
1401         ret = smsc95xx_enable_phy_wakeup_interrupts(dev,
1402                 PHY_INT_MASK_LINK_DOWN_);
1403         if (ret < 0) {
1404                 netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1405                 return ret;
1406         }
1407
1408         netdev_dbg(dev->net, "autosuspend entering SUSPEND3\n");
1409         return smsc95xx_enter_suspend3(dev);
1410 }
1411
1412 static int smsc95xx_suspend(struct usb_interface *intf, pm_message_t message)
1413 {
1414         struct usbnet *dev = usb_get_intfdata(intf);
1415         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1416         u32 val, link_up;
1417         int ret;
1418
1419         ret = usbnet_suspend(intf, message);
1420         if (ret < 0) {
1421                 netdev_warn(dev->net, "usbnet_suspend error\n");
1422                 return ret;
1423         }
1424
1425         if (pdata->suspend_flags) {
1426                 netdev_warn(dev->net, "error during last resume\n");
1427                 pdata->suspend_flags = 0;
1428         }
1429
1430         /* determine if link is up using only _nopm functions */
1431         link_up = smsc95xx_link_ok_nopm(dev);
1432
1433         if (message.event == PM_EVENT_AUTO_SUSPEND &&
1434             (pdata->features & FEATURE_REMOTE_WAKEUP)) {
1435                 ret = smsc95xx_autosuspend(dev, link_up);
1436                 goto done;
1437         }
1438
1439         /* if we get this far we're not autosuspending */
1440         /* if no wol options set, or if link is down and we're not waking on
1441          * PHY activity, enter lowest power SUSPEND2 mode
1442          */
1443         if (!(pdata->wolopts & SUPPORTED_WAKE) ||
1444                 !(link_up || (pdata->wolopts & WAKE_PHY))) {
1445                 netdev_info(dev->net, "entering SUSPEND2 mode\n");
1446
1447                 /* disable energy detect (link up) & wake up events */
1448                 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val);
1449                 if (ret < 0)
1450                         goto done;
1451
1452                 val &= ~(WUCSR_MPEN_ | WUCSR_WAKE_EN_);
1453
1454                 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val);
1455                 if (ret < 0)
1456                         goto done;
1457
1458                 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1459                 if (ret < 0)
1460                         goto done;
1461
1462                 val &= ~(PM_CTL_ED_EN_ | PM_CTL_WOL_EN_);
1463
1464                 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1465                 if (ret < 0)
1466                         goto done;
1467
1468                 ret = smsc95xx_enter_suspend2(dev);
1469                 goto done;
1470         }
1471
1472         if (pdata->wolopts & WAKE_PHY) {
1473                 ret = smsc95xx_enable_phy_wakeup_interrupts(dev,
1474                         (PHY_INT_MASK_ANEG_COMP_ | PHY_INT_MASK_LINK_DOWN_));
1475                 if (ret < 0) {
1476                         netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1477                         goto done;
1478                 }
1479
1480                 /* if link is down then configure EDPD and enter SUSPEND1,
1481                  * otherwise enter SUSPEND0 below
1482                  */
1483                 if (!link_up) {
1484                         netdev_info(dev->net, "entering SUSPEND1 mode\n");
1485                         ret = smsc95xx_enter_suspend1(dev);
1486                         goto done;
1487                 }
1488         }
1489
1490         if (pdata->wolopts & (WAKE_BCAST | WAKE_MCAST | WAKE_ARP | WAKE_UCAST)) {
1491                 u32 *filter_mask = kzalloc(sizeof(u32) * 32, GFP_KERNEL);
1492                 u32 command[2];
1493                 u32 offset[2];
1494                 u32 crc[4];
1495                 int wuff_filter_count =
1496                         (pdata->features & FEATURE_8_WAKEUP_FILTERS) ?
1497                         LAN9500A_WUFF_NUM : LAN9500_WUFF_NUM;
1498                 int i, filter = 0;
1499
1500                 if (!filter_mask) {
1501                         netdev_warn(dev->net, "Unable to allocate filter_mask\n");
1502                         ret = -ENOMEM;
1503                         goto done;
1504                 }
1505
1506                 memset(command, 0, sizeof(command));
1507                 memset(offset, 0, sizeof(offset));
1508                 memset(crc, 0, sizeof(crc));
1509
1510                 if (pdata->wolopts & WAKE_BCAST) {
1511                         const u8 bcast[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
1512                         netdev_info(dev->net, "enabling broadcast detection\n");
1513                         filter_mask[filter * 4] = 0x003F;
1514                         filter_mask[filter * 4 + 1] = 0x00;
1515                         filter_mask[filter * 4 + 2] = 0x00;
1516                         filter_mask[filter * 4 + 3] = 0x00;
1517                         command[filter/4] |= 0x05UL << ((filter % 4) * 8);
1518                         offset[filter/4] |= 0x00 << ((filter % 4) * 8);
1519                         crc[filter/2] |= smsc_crc(bcast, 6, filter);
1520                         filter++;
1521                 }
1522
1523                 if (pdata->wolopts & WAKE_MCAST) {
1524                         const u8 mcast[] = {0x01, 0x00, 0x5E};
1525                         netdev_info(dev->net, "enabling multicast detection\n");
1526                         filter_mask[filter * 4] = 0x0007;
1527                         filter_mask[filter * 4 + 1] = 0x00;
1528                         filter_mask[filter * 4 + 2] = 0x00;
1529                         filter_mask[filter * 4 + 3] = 0x00;
1530                         command[filter/4] |= 0x09UL << ((filter % 4) * 8);
1531                         offset[filter/4] |= 0x00  << ((filter % 4) * 8);
1532                         crc[filter/2] |= smsc_crc(mcast, 3, filter);
1533                         filter++;
1534                 }
1535
1536                 if (pdata->wolopts & WAKE_ARP) {
1537                         const u8 arp[] = {0x08, 0x06};
1538                         netdev_info(dev->net, "enabling ARP detection\n");
1539                         filter_mask[filter * 4] = 0x0003;
1540                         filter_mask[filter * 4 + 1] = 0x00;
1541                         filter_mask[filter * 4 + 2] = 0x00;
1542                         filter_mask[filter * 4 + 3] = 0x00;
1543                         command[filter/4] |= 0x05UL << ((filter % 4) * 8);
1544                         offset[filter/4] |= 0x0C << ((filter % 4) * 8);
1545                         crc[filter/2] |= smsc_crc(arp, 2, filter);
1546                         filter++;
1547                 }
1548
1549                 if (pdata->wolopts & WAKE_UCAST) {
1550                         netdev_info(dev->net, "enabling unicast detection\n");
1551                         filter_mask[filter * 4] = 0x003F;
1552                         filter_mask[filter * 4 + 1] = 0x00;
1553                         filter_mask[filter * 4 + 2] = 0x00;
1554                         filter_mask[filter * 4 + 3] = 0x00;
1555                         command[filter/4] |= 0x01UL << ((filter % 4) * 8);
1556                         offset[filter/4] |= 0x00 << ((filter % 4) * 8);
1557                         crc[filter/2] |= smsc_crc(dev->net->dev_addr, ETH_ALEN, filter);
1558                         filter++;
1559                 }
1560
1561                 for (i = 0; i < (wuff_filter_count * 4); i++) {
1562                         ret = smsc95xx_write_reg_nopm(dev, WUFF, filter_mask[i]);
1563                         if (ret < 0) {
1564                                 kfree(filter_mask);
1565                                 goto done;
1566                         }
1567                 }
1568                 kfree(filter_mask);
1569
1570                 for (i = 0; i < (wuff_filter_count / 4); i++) {
1571                         ret = smsc95xx_write_reg_nopm(dev, WUFF, command[i]);
1572                         if (ret < 0)
1573                                 goto done;
1574                 }
1575
1576                 for (i = 0; i < (wuff_filter_count / 4); i++) {
1577                         ret = smsc95xx_write_reg_nopm(dev, WUFF, offset[i]);
1578                         if (ret < 0)
1579                                 goto done;
1580                 }
1581
1582                 for (i = 0; i < (wuff_filter_count / 2); i++) {
1583                         ret = smsc95xx_write_reg_nopm(dev, WUFF, crc[i]);
1584                         if (ret < 0)
1585                                 goto done;
1586                 }
1587
1588                 /* clear any pending pattern match packet status */
1589                 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val);
1590                 if (ret < 0)
1591                         goto done;
1592
1593                 val |= WUCSR_WUFR_;
1594
1595                 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val);
1596                 if (ret < 0)
1597                         goto done;
1598         }
1599
1600         if (pdata->wolopts & WAKE_MAGIC) {
1601                 /* clear any pending magic packet status */
1602                 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val);
1603                 if (ret < 0)
1604                         goto done;
1605
1606                 val |= WUCSR_MPR_;
1607
1608                 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val);
1609                 if (ret < 0)
1610                         goto done;
1611         }
1612
1613         /* enable/disable wakeup sources */
1614         ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val);
1615         if (ret < 0)
1616                 goto done;
1617
1618         if (pdata->wolopts & (WAKE_BCAST | WAKE_MCAST | WAKE_ARP | WAKE_UCAST)) {
1619                 netdev_info(dev->net, "enabling pattern match wakeup\n");
1620                 val |= WUCSR_WAKE_EN_;
1621         } else {
1622                 netdev_info(dev->net, "disabling pattern match wakeup\n");
1623                 val &= ~WUCSR_WAKE_EN_;
1624         }
1625
1626         if (pdata->wolopts & WAKE_MAGIC) {
1627                 netdev_info(dev->net, "enabling magic packet wakeup\n");
1628                 val |= WUCSR_MPEN_;
1629         } else {
1630                 netdev_info(dev->net, "disabling magic packet wakeup\n");
1631                 val &= ~WUCSR_MPEN_;
1632         }
1633
1634         ret = smsc95xx_write_reg_nopm(dev, WUCSR, val);
1635         if (ret < 0)
1636                 goto done;
1637
1638         /* enable wol wakeup source */
1639         ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1640         if (ret < 0)
1641                 goto done;
1642
1643         val |= PM_CTL_WOL_EN_;
1644
1645         /* phy energy detect wakeup source */
1646         if (pdata->wolopts & WAKE_PHY)
1647                 val |= PM_CTL_ED_EN_;
1648
1649         ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1650         if (ret < 0)
1651                 goto done;
1652
1653         /* enable receiver to enable frame reception */
1654         smsc95xx_start_rx_path(dev, 1);
1655
1656         /* some wol options are enabled, so enter SUSPEND0 */
1657         netdev_info(dev->net, "entering SUSPEND0 mode\n");
1658         ret = smsc95xx_enter_suspend0(dev);
1659
1660 done:
1661         /*
1662          * TODO: resume() might need to handle the suspend failure
1663          * in system sleep
1664          */
1665         if (ret && PMSG_IS_AUTO(message))
1666                 usbnet_resume(intf);
1667         return ret;
1668 }
1669
1670 static int smsc95xx_resume(struct usb_interface *intf)
1671 {
1672         struct usbnet *dev = usb_get_intfdata(intf);
1673         struct smsc95xx_priv *pdata;
1674         u8 suspend_flags;
1675         int ret;
1676         u32 val;
1677
1678         BUG_ON(!dev);
1679         pdata = (struct smsc95xx_priv *)(dev->data[0]);
1680         suspend_flags = pdata->suspend_flags;
1681
1682         netdev_dbg(dev->net, "resume suspend_flags=0x%02x\n", suspend_flags);
1683
1684         /* do this first to ensure it's cleared even in error case */
1685         pdata->suspend_flags = 0;
1686
1687         if (suspend_flags & SUSPEND_ALLMODES) {
1688                 /* clear wake-up sources */
1689                 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val);
1690                 if (ret < 0)
1691                         return ret;
1692
1693                 val &= ~(WUCSR_WAKE_EN_ | WUCSR_MPEN_);
1694
1695                 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val);
1696                 if (ret < 0)
1697                         return ret;
1698
1699                 /* clear wake-up status */
1700                 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1701                 if (ret < 0)
1702                         return ret;
1703
1704                 val &= ~PM_CTL_WOL_EN_;
1705                 val |= PM_CTL_WUPS_;
1706
1707                 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1708                 if (ret < 0)
1709                         return ret;
1710         }
1711
1712         ret = usbnet_resume(intf);
1713         if (ret < 0)
1714                 netdev_warn(dev->net, "usbnet_resume error\n");
1715
1716         return ret;
1717 }
1718
1719 static int smsc95xx_reset_resume(struct usb_interface *intf)
1720 {
1721         struct usbnet *dev = usb_get_intfdata(intf);
1722         int ret;
1723
1724         ret = smsc95xx_reset(dev);
1725         if (ret < 0)
1726                 return ret;
1727
1728         return smsc95xx_resume(intf);
1729 }
1730
1731 static void smsc95xx_rx_csum_offload(struct sk_buff *skb)
1732 {
1733         skb->csum = *(u16 *)(skb_tail_pointer(skb) - 2);
1734         skb->ip_summed = CHECKSUM_COMPLETE;
1735         skb_trim(skb, skb->len - 2);
1736 }
1737
1738 static int smsc95xx_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
1739 {
1740         /* This check is no longer done by usbnet */
1741         if (skb->len < dev->net->hard_header_len)
1742                 return 0;
1743
1744         while (skb->len > 0) {
1745                 u32 header, align_count;
1746                 struct sk_buff *ax_skb;
1747                 unsigned char *packet;
1748                 u16 size;
1749
1750                 memcpy(&header, skb->data, sizeof(header));
1751                 le32_to_cpus(&header);
1752                 skb_pull(skb, 4 + NET_IP_ALIGN);
1753                 packet = skb->data;
1754
1755                 /* get the packet length */
1756                 size = (u16)((header & RX_STS_FL_) >> 16);
1757                 align_count = (4 - ((size + NET_IP_ALIGN) % 4)) % 4;
1758
1759                 if (unlikely(header & RX_STS_ES_)) {
1760                         netif_dbg(dev, rx_err, dev->net,
1761                                   "Error header=0x%08x\n", header);
1762                         dev->net->stats.rx_errors++;
1763                         dev->net->stats.rx_dropped++;
1764
1765                         if (header & RX_STS_CRC_) {
1766                                 dev->net->stats.rx_crc_errors++;
1767                         } else {
1768                                 if (header & (RX_STS_TL_ | RX_STS_RF_))
1769                                         dev->net->stats.rx_frame_errors++;
1770
1771                                 if ((header & RX_STS_LE_) &&
1772                                         (!(header & RX_STS_FT_)))
1773                                         dev->net->stats.rx_length_errors++;
1774                         }
1775                 } else {
1776                         /* ETH_FRAME_LEN + 4(CRC) + 2(COE) + 4(Vlan) */
1777                         if (unlikely(size > (ETH_FRAME_LEN + 12))) {
1778                                 netif_dbg(dev, rx_err, dev->net,
1779                                           "size err header=0x%08x\n", header);
1780                                 return 0;
1781                         }
1782
1783                         /* last frame in this batch */
1784                         if (skb->len == size) {
1785                                 if (dev->net->features & NETIF_F_RXCSUM)
1786                                         smsc95xx_rx_csum_offload(skb);
1787                                 skb_trim(skb, skb->len - 4); /* remove fcs */
1788                                 skb->truesize = size + sizeof(struct sk_buff);
1789
1790                                 return 1;
1791                         }
1792
1793                         ax_skb = skb_clone(skb, GFP_ATOMIC);
1794                         if (unlikely(!ax_skb)) {
1795                                 netdev_warn(dev->net, "Error allocating skb\n");
1796                                 return 0;
1797                         }
1798
1799                         ax_skb->len = size;
1800                         ax_skb->data = packet;
1801                         skb_set_tail_pointer(ax_skb, size);
1802
1803                         if (dev->net->features & NETIF_F_RXCSUM)
1804                                 smsc95xx_rx_csum_offload(ax_skb);
1805                         skb_trim(ax_skb, ax_skb->len - 4); /* remove fcs */
1806                         ax_skb->truesize = size + sizeof(struct sk_buff);
1807
1808                         usbnet_skb_return(dev, ax_skb);
1809                 }
1810
1811                 skb_pull(skb, size);
1812
1813                 /* padding bytes before the next frame starts */
1814                 if (skb->len)
1815                         skb_pull(skb, align_count);
1816         }
1817
1818         return 1;
1819 }
1820
1821 static u32 smsc95xx_calc_csum_preamble(struct sk_buff *skb)
1822 {
1823         u16 low_16 = (u16)skb_checksum_start_offset(skb);
1824         u16 high_16 = low_16 + skb->csum_offset;
1825         return (high_16 << 16) | low_16;
1826 }
1827
1828 static struct sk_buff *smsc95xx_tx_fixup(struct usbnet *dev,
1829                                          struct sk_buff *skb, gfp_t flags)
1830 {
1831         bool csum = skb->ip_summed == CHECKSUM_PARTIAL;
1832         int overhead = csum ? SMSC95XX_TX_OVERHEAD_CSUM : SMSC95XX_TX_OVERHEAD;
1833         u32 tx_cmd_a, tx_cmd_b;
1834
1835         /* We do not advertise SG, so skbs should be already linearized */
1836         BUG_ON(skb_shinfo(skb)->nr_frags);
1837
1838         if (skb_headroom(skb) < overhead) {
1839                 struct sk_buff *skb2 = skb_copy_expand(skb,
1840                         overhead, 0, flags);
1841                 dev_kfree_skb_any(skb);
1842                 skb = skb2;
1843                 if (!skb)
1844                         return NULL;
1845         }
1846
1847         if (csum) {
1848                 if (skb->len <= 45) {
1849                         /* workaround - hardware tx checksum does not work
1850                          * properly with extremely small packets */
1851                         long csstart = skb_checksum_start_offset(skb);
1852                         __wsum calc = csum_partial(skb->data + csstart,
1853                                 skb->len - csstart, 0);
1854                         *((__sum16 *)(skb->data + csstart
1855                                 + skb->csum_offset)) = csum_fold(calc);
1856
1857                         csum = false;
1858                 } else {
1859                         u32 csum_preamble = smsc95xx_calc_csum_preamble(skb);
1860                         skb_push(skb, 4);
1861                         cpu_to_le32s(&csum_preamble);
1862                         memcpy(skb->data, &csum_preamble, 4);
1863                 }
1864         }
1865
1866         skb_push(skb, 4);
1867         tx_cmd_b = (u32)(skb->len - 4);
1868         if (csum)
1869                 tx_cmd_b |= TX_CMD_B_CSUM_ENABLE;
1870         cpu_to_le32s(&tx_cmd_b);
1871         memcpy(skb->data, &tx_cmd_b, 4);
1872
1873         skb_push(skb, 4);
1874         tx_cmd_a = (u32)(skb->len - 8) | TX_CMD_A_FIRST_SEG_ |
1875                 TX_CMD_A_LAST_SEG_;
1876         cpu_to_le32s(&tx_cmd_a);
1877         memcpy(skb->data, &tx_cmd_a, 4);
1878
1879         return skb;
1880 }
1881
1882 static int smsc95xx_manage_power(struct usbnet *dev, int on)
1883 {
1884         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1885
1886         dev->intf->needs_remote_wakeup = on;
1887
1888         if (pdata->features & FEATURE_REMOTE_WAKEUP)
1889                 return 0;
1890
1891         /* this chip revision isn't capable of remote wakeup */
1892         netdev_info(dev->net, "hardware isn't capable of remote wakeup\n");
1893
1894         if (on)
1895                 usb_autopm_get_interface_no_resume(dev->intf);
1896         else
1897                 usb_autopm_put_interface(dev->intf);
1898
1899         return 0;
1900 }
1901
1902 static const struct driver_info smsc95xx_info = {
1903         .description    = "smsc95xx USB 2.0 Ethernet",
1904         .bind           = smsc95xx_bind,
1905         .unbind         = smsc95xx_unbind,
1906         .link_reset     = smsc95xx_link_reset,
1907         .reset          = smsc95xx_reset,
1908         .rx_fixup       = smsc95xx_rx_fixup,
1909         .tx_fixup       = smsc95xx_tx_fixup,
1910         .status         = smsc95xx_status,
1911         .manage_power   = smsc95xx_manage_power,
1912         .flags          = FLAG_ETHER | FLAG_SEND_ZLP | FLAG_LINK_INTR,
1913 };
1914
1915 static const struct usb_device_id products[] = {
1916         {
1917                 /* SMSC9500 USB Ethernet Device */
1918                 USB_DEVICE(0x0424, 0x9500),
1919                 .driver_info = (unsigned long) &smsc95xx_info,
1920         },
1921         {
1922                 /* SMSC9505 USB Ethernet Device */
1923                 USB_DEVICE(0x0424, 0x9505),
1924                 .driver_info = (unsigned long) &smsc95xx_info,
1925         },
1926         {
1927                 /* SMSC9500A USB Ethernet Device */
1928                 USB_DEVICE(0x0424, 0x9E00),
1929                 .driver_info = (unsigned long) &smsc95xx_info,
1930         },
1931         {
1932                 /* SMSC9505A USB Ethernet Device */
1933                 USB_DEVICE(0x0424, 0x9E01),
1934                 .driver_info = (unsigned long) &smsc95xx_info,
1935         },
1936         {
1937                 /* SMSC9512/9514 USB Hub & Ethernet Device */
1938                 USB_DEVICE(0x0424, 0xec00),
1939                 .driver_info = (unsigned long) &smsc95xx_info,
1940         },
1941         {
1942                 /* SMSC9500 USB Ethernet Device (SAL10) */
1943                 USB_DEVICE(0x0424, 0x9900),
1944                 .driver_info = (unsigned long) &smsc95xx_info,
1945         },
1946         {
1947                 /* SMSC9505 USB Ethernet Device (SAL10) */
1948                 USB_DEVICE(0x0424, 0x9901),
1949                 .driver_info = (unsigned long) &smsc95xx_info,
1950         },
1951         {
1952                 /* SMSC9500A USB Ethernet Device (SAL10) */
1953                 USB_DEVICE(0x0424, 0x9902),
1954                 .driver_info = (unsigned long) &smsc95xx_info,
1955         },
1956         {
1957                 /* SMSC9505A USB Ethernet Device (SAL10) */
1958                 USB_DEVICE(0x0424, 0x9903),
1959                 .driver_info = (unsigned long) &smsc95xx_info,
1960         },
1961         {
1962                 /* SMSC9512/9514 USB Hub & Ethernet Device (SAL10) */
1963                 USB_DEVICE(0x0424, 0x9904),
1964                 .driver_info = (unsigned long) &smsc95xx_info,
1965         },
1966         {
1967                 /* SMSC9500A USB Ethernet Device (HAL) */
1968                 USB_DEVICE(0x0424, 0x9905),
1969                 .driver_info = (unsigned long) &smsc95xx_info,
1970         },
1971         {
1972                 /* SMSC9505A USB Ethernet Device (HAL) */
1973                 USB_DEVICE(0x0424, 0x9906),
1974                 .driver_info = (unsigned long) &smsc95xx_info,
1975         },
1976         {
1977                 /* SMSC9500 USB Ethernet Device (Alternate ID) */
1978                 USB_DEVICE(0x0424, 0x9907),
1979                 .driver_info = (unsigned long) &smsc95xx_info,
1980         },
1981         {
1982                 /* SMSC9500A USB Ethernet Device (Alternate ID) */
1983                 USB_DEVICE(0x0424, 0x9908),
1984                 .driver_info = (unsigned long) &smsc95xx_info,
1985         },
1986         {
1987                 /* SMSC9512/9514 USB Hub & Ethernet Device (Alternate ID) */
1988                 USB_DEVICE(0x0424, 0x9909),
1989                 .driver_info = (unsigned long) &smsc95xx_info,
1990         },
1991         {
1992                 /* SMSC LAN9530 USB Ethernet Device */
1993                 USB_DEVICE(0x0424, 0x9530),
1994                 .driver_info = (unsigned long) &smsc95xx_info,
1995         },
1996         {
1997                 /* SMSC LAN9730 USB Ethernet Device */
1998                 USB_DEVICE(0x0424, 0x9730),
1999                 .driver_info = (unsigned long) &smsc95xx_info,
2000         },
2001         {
2002                 /* SMSC LAN89530 USB Ethernet Device */
2003                 USB_DEVICE(0x0424, 0x9E08),
2004                 .driver_info = (unsigned long) &smsc95xx_info,
2005         },
2006         { },            /* END */
2007 };
2008 MODULE_DEVICE_TABLE(usb, products);
2009
2010 static struct usb_driver smsc95xx_driver = {
2011         .name           = "smsc95xx",
2012         .id_table       = products,
2013         .probe          = usbnet_probe,
2014         .suspend        = smsc95xx_suspend,
2015         .resume         = smsc95xx_resume,
2016         .reset_resume   = smsc95xx_reset_resume,
2017         .disconnect     = usbnet_disconnect,
2018         .disable_hub_initiated_lpm = 1,
2019         .supports_autosuspend = 1,
2020 };
2021
2022 module_usb_driver(smsc95xx_driver);
2023
2024 MODULE_AUTHOR("Nancy Lin");
2025 MODULE_AUTHOR("Steve Glendinning <steve.glendinning@shawell.net>");
2026 MODULE_DESCRIPTION("SMSC95XX USB 2.0 Ethernet Devices");
2027 MODULE_LICENSE("GPL");