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 <linux/of_net.h>
  33 #include "smsc95xx.h"
  34
  35 #define SMSC_CHIPNAME                   "smsc95xx"
  36 #define SMSC_DRIVER_VERSION             "1.0.4"
  37 #define HS_USB_PKT_SIZE                 (512)
  38 #define FS_USB_PKT_SIZE                 (64)
  39 #define DEFAULT_HS_BURST_CAP_SIZE       (16 * 1024 + 5 * HS_USB_PKT_SIZE)
  40 #define DEFAULT_FS_BURST_CAP_SIZE       (6 * 1024 + 33 * FS_USB_PKT_SIZE)
  41 #define DEFAULT_BULK_IN_DELAY           (0x00002000)
  42 #define MAX_SINGLE_PACKET_SIZE          (2048)
  43 #define LAN95XX_EEPROM_MAGIC            (0x9500)
  44 #define EEPROM_MAC_OFFSET               (0x01)
  45 #define DEFAULT_TX_CSUM_ENABLE          (true)
  46 #define DEFAULT_RX_CSUM_ENABLE          (true)
  47 #define SMSC95XX_INTERNAL_PHY_ID        (1)
  48 #define SMSC95XX_TX_OVERHEAD            (8)
  49 #define SMSC95XX_TX_OVERHEAD_CSUM       (12)
  50 #define SUPPORTED_WAKE                  (WAKE_PHY | WAKE_UCAST | WAKE_BCAST | \
  51                                          WAKE_MCAST | WAKE_ARP | WAKE_MAGIC)
  52
  53 #define FEATURE_8_WAKEUP_FILTERS        (0x01)
  54 #define FEATURE_PHY_NLP_CROSSOVER       (0x02)
  55 #define FEATURE_REMOTE_WAKEUP           (0x04)
  56
  57 #define SUSPEND_SUSPEND0                (0x01)
  58 #define SUSPEND_SUSPEND1                (0x02)
  59 #define SUSPEND_SUSPEND2                (0x04)
  60 #define SUSPEND_SUSPEND3                (0x08)
  61 #define SUSPEND_ALLMODES                (SUSPEND_SUSPEND0 | SUSPEND_SUSPEND1 | \
  62                                          SUSPEND_SUSPEND2 | SUSPEND_SUSPEND3)
  63
  64 struct smsc95xx_priv {
  65         u32 mac_cr;
  66         u32 hash_hi;
  67         u32 hash_lo;
  68         u32 wolopts;
  69         spinlock_t mac_cr_lock;
  70         u8 features;
  71         u8 suspend_flags;
  72 };
  73
  74 static bool turbo_mode = true;
  75 module_param(turbo_mode, bool, 0644);
  76 MODULE_PARM_DESC(turbo_mode, "Enable multiple frames per Rx transaction");
  77
  78 static int __must_check __smsc95xx_read_reg(struct usbnet *dev, u32 index,
  79                                             u32 *data, int in_pm)
  80 {
  81         u32 buf;
  82         int ret;
  83         int (*fn)(struct usbnet *, u8, u8, u16, u16, void *, u16);
  84
  85         BUG_ON(!dev);
  86
  87         if (!in_pm)
  88                 fn = usbnet_read_cmd;
  89         else
  90                 fn = usbnet_read_cmd_nopm;
  91
  92         ret = fn(dev, USB_VENDOR_REQUEST_READ_REGISTER, USB_DIR_IN
  93                  | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
  94                  0, index, &buf, 4);
  95         if (unlikely(ret < 0)) {
  96                 netdev_warn(dev->net, "Failed to read reg index 0x%08x: %d\n",
  97                             index, ret);
  98                 return ret;
  99         }
 100
 101         le32_to_cpus(&buf);
 102         *data = buf;
 103
 104         return ret;
 105 }
 106
 107 static int __must_check __smsc95xx_write_reg(struct usbnet *dev, u32 index,
 108                                              u32 data, int in_pm)
 109 {
 110         u32 buf;
 111         int ret;
 112         int (*fn)(struct usbnet *, u8, u8, u16, u16, const void *, u16);
 113
 114         BUG_ON(!dev);
 115
 116         if (!in_pm)
 117                 fn = usbnet_write_cmd;
 118         else
 119                 fn = usbnet_write_cmd_nopm;
 120
 121         buf = data;
 122         cpu_to_le32s(&buf);
 123
 124         ret = fn(dev, USB_VENDOR_REQUEST_WRITE_REGISTER, USB_DIR_OUT
 125                  | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 126                  0, index, &buf, 4);
 127         if (unlikely(ret < 0))
 128                 netdev_warn(dev->net, "Failed to write reg index 0x%08x: %d\n",
 129                             index, ret);
 130
 131         return ret;
 132 }
 133
 134 static int __must_check smsc95xx_read_reg_nopm(struct usbnet *dev, u32 index,
 135                                                u32 *data)
 136 {
 137         return __smsc95xx_read_reg(dev, index, data, 1);
 138 }
 139
 140 static int __must_check smsc95xx_write_reg_nopm(struct usbnet *dev, u32 index,
 141                                                 u32 data)
 142 {
 143         return __smsc95xx_write_reg(dev, index, data, 1);
 144 }
 145
 146 static int __must_check smsc95xx_read_reg(struct usbnet *dev, u32 index,
 147                                           u32 *data)
 148 {
 149         return __smsc95xx_read_reg(dev, index, data, 0);
 150 }
 151
 152 static int __must_check smsc95xx_write_reg(struct usbnet *dev, u32 index,
 153                                            u32 data)
 154 {
 155         return __smsc95xx_write_reg(dev, index, data, 0);
 156 }
 157
 158 /* Loop until the read is completed with timeout
 159  * called with phy_mutex held */
 160 static int __must_check __smsc95xx_phy_wait_not_busy(struct usbnet *dev,
 161                                                      int in_pm)
 162 {
 163         unsigned long start_time = jiffies;
 164         u32 val;
 165         int ret;
 166
 167         do {
 168                 ret = __smsc95xx_read_reg(dev, MII_ADDR, &val, in_pm);
 169                 if (ret < 0) {
 170                         netdev_warn(dev->net, "Error reading MII_ACCESS\n");
 171                         return ret;
 172                 }
 173
 174                 if (!(val & MII_BUSY_))
 175                         return 0;
 176         } while (!time_after(jiffies, start_time + HZ));
 177
 178         return -EIO;
 179 }
 180
 181 static int __smsc95xx_mdio_read(struct net_device *netdev, int phy_id, int idx,
 182                                 int in_pm)
 183 {
 184         struct usbnet *dev = netdev_priv(netdev);
 185         u32 val, addr;
 186         int ret;
 187
 188         mutex_lock(&dev->phy_mutex);
 189
 190         /* confirm MII not busy */
 191         ret = __smsc95xx_phy_wait_not_busy(dev, in_pm);
 192         if (ret < 0) {
 193                 netdev_warn(dev->net, "MII is busy in smsc95xx_mdio_read\n");
 194                 goto done;
 195         }
 196
 197         /* set the address, index & direction (read from PHY) */
 198         phy_id &= dev->mii.phy_id_mask;
 199         idx &= dev->mii.reg_num_mask;
 200         addr = (phy_id << 11) | (idx << 6) | MII_READ_ | MII_BUSY_;
 201         ret = __smsc95xx_write_reg(dev, MII_ADDR, addr, in_pm);
 202         if (ret < 0) {
 203                 netdev_warn(dev->net, "Error writing MII_ADDR\n");
 204                 goto done;
 205         }
 206
 207         ret = __smsc95xx_phy_wait_not_busy(dev, in_pm);
 208         if (ret < 0) {
 209                 netdev_warn(dev->net, "Timed out reading MII reg %02X\n", idx);
 210                 goto done;
 211         }
 212
 213         ret = __smsc95xx_read_reg(dev, MII_DATA, &val, in_pm);
 214         if (ret < 0) {
 215                 netdev_warn(dev->net, "Error reading MII_DATA\n");
 216                 goto done;
 217         }
 218
 219         ret = (u16)(val & 0xFFFF);
 220
 221 done:
 222         mutex_unlock(&dev->phy_mutex);
 223         return ret;
 224 }
 225
 226 static void __smsc95xx_mdio_write(struct net_device *netdev, int phy_id,
 227                                   int idx, int regval, int in_pm)
 228 {
 229         struct usbnet *dev = netdev_priv(netdev);
 230         u32 val, addr;
 231         int ret;
 232
 233         mutex_lock(&dev->phy_mutex);
 234
 235         /* confirm MII not busy */
 236         ret = __smsc95xx_phy_wait_not_busy(dev, in_pm);
 237         if (ret < 0) {
 238                 netdev_warn(dev->net, "MII is busy in smsc95xx_mdio_write\n");
 239                 goto done;
 240         }
 241
 242         val = regval;
 243         ret = __smsc95xx_write_reg(dev, MII_DATA, val, in_pm);
 244         if (ret < 0) {
 245                 netdev_warn(dev->net, "Error writing MII_DATA\n");
 246                 goto done;
 247         }
 248
 249         /* set the address, index & direction (write to PHY) */
 250         phy_id &= dev->mii.phy_id_mask;
 251         idx &= dev->mii.reg_num_mask;
 252         addr = (phy_id << 11) | (idx << 6) | MII_WRITE_ | MII_BUSY_;
 253         ret = __smsc95xx_write_reg(dev, MII_ADDR, addr, in_pm);
 254         if (ret < 0) {
 255                 netdev_warn(dev->net, "Error writing MII_ADDR\n");
 256                 goto done;
 257         }
 258
 259         ret = __smsc95xx_phy_wait_not_busy(dev, in_pm);
 260         if (ret < 0) {
 261                 netdev_warn(dev->net, "Timed out writing MII reg %02X\n", idx);
 262                 goto done;
 263         }
 264
 265 done:
 266         mutex_unlock(&dev->phy_mutex);
 267 }
 268
 269 static int smsc95xx_mdio_read_nopm(struct net_device *netdev, int phy_id,
 270                                    int idx)
 271 {
 272         return __smsc95xx_mdio_read(netdev, phy_id, idx, 1);
 273 }
 274
 275 static void smsc95xx_mdio_write_nopm(struct net_device *netdev, int phy_id,
 276                                      int idx, int regval)
 277 {
 278         __smsc95xx_mdio_write(netdev, phy_id, idx, regval, 1);
 279 }
 280
 281 static int smsc95xx_mdio_read(struct net_device *netdev, int phy_id, int idx)
 282 {
 283         return __smsc95xx_mdio_read(netdev, phy_id, idx, 0);
 284 }
 285
 286 static void smsc95xx_mdio_write(struct net_device *netdev, int phy_id, int idx,
 287                                 int regval)
 288 {
 289         __smsc95xx_mdio_write(netdev, phy_id, idx, regval, 0);
 290 }
 291
 292 static int __must_check smsc95xx_wait_eeprom(struct usbnet *dev)
 293 {
 294         unsigned long start_time = jiffies;
 295         u32 val;
 296         int ret;
 297
 298         do {
 299                 ret = smsc95xx_read_reg(dev, E2P_CMD, &val);
 300                 if (ret < 0) {
 301                         netdev_warn(dev->net, "Error reading E2P_CMD\n");
 302                         return ret;
 303                 }
 304
 305                 if (!(val & E2P_CMD_BUSY_) || (val & E2P_CMD_TIMEOUT_))
 306                         break;
 307                 udelay(40);
 308         } while (!time_after(jiffies, start_time + HZ));
 309
 310         if (val & (E2P_CMD_TIMEOUT_ | E2P_CMD_BUSY_)) {
 311                 netdev_warn(dev->net, "EEPROM read operation timeout\n");
 312                 return -EIO;
 313         }
 314
 315         return 0;
 316 }
 317
 318 static int __must_check smsc95xx_eeprom_confirm_not_busy(struct usbnet *dev)
 319 {
 320         unsigned long start_time = jiffies;
 321         u32 val;
 322         int ret;
 323
 324         do {
 325                 ret = smsc95xx_read_reg(dev, E2P_CMD, &val);
 326                 if (ret < 0) {
 327                         netdev_warn(dev->net, "Error reading E2P_CMD\n");
 328                         return ret;
 329                 }
 330
 331                 if (!(val & E2P_CMD_BUSY_))
 332                         return 0;
 333
 334                 udelay(40);
 335         } while (!time_after(jiffies, start_time + HZ));
 336
 337         netdev_warn(dev->net, "EEPROM is busy\n");
 338         return -EIO;
 339 }
 340
 341 static int smsc95xx_read_eeprom(struct usbnet *dev, u32 offset, u32 length,
 342                                 u8 *data)
 343 {
 344         u32 val;
 345         int i, ret;
 346
 347         BUG_ON(!dev);
 348         BUG_ON(!data);
 349
 350         ret = smsc95xx_eeprom_confirm_not_busy(dev);
 351         if (ret)
 352                 return ret;
 353
 354         for (i = 0; i < length; i++) {
 355                 val = E2P_CMD_BUSY_ | E2P_CMD_READ_ | (offset & E2P_CMD_ADDR_);
 356                 ret = smsc95xx_write_reg(dev, E2P_CMD, val);
 357                 if (ret < 0) {
 358                         netdev_warn(dev->net, "Error writing E2P_CMD\n");
 359                         return ret;
 360                 }
 361
 362                 ret = smsc95xx_wait_eeprom(dev);
 363                 if (ret < 0)
 364                         return ret;
 365
 366                 ret = smsc95xx_read_reg(dev, E2P_DATA, &val);
 367                 if (ret < 0) {
 368                         netdev_warn(dev->net, "Error reading E2P_DATA\n");
 369                         return ret;
 370                 }
 371
 372                 data[i] = val & 0xFF;
 373                 offset++;
 374         }
 375
 376         return 0;
 377 }
 378
 379 static int smsc95xx_write_eeprom(struct usbnet *dev, u32 offset, u32 length,
 380                                  u8 *data)
 381 {
 382         u32 val;
 383         int i, ret;
 384
 385         BUG_ON(!dev);
 386         BUG_ON(!data);
 387
 388         ret = smsc95xx_eeprom_confirm_not_busy(dev);
 389         if (ret)
 390                 return ret;
 391
 392         /* Issue write/erase enable command */
 393         val = E2P_CMD_BUSY_ | E2P_CMD_EWEN_;
 394         ret = smsc95xx_write_reg(dev, E2P_CMD, val);
 395         if (ret < 0) {
 396                 netdev_warn(dev->net, "Error writing E2P_DATA\n");
 397                 return ret;
 398         }
 399
 400         ret = smsc95xx_wait_eeprom(dev);
 401         if (ret < 0)
 402                 return ret;
 403
 404         for (i = 0; i < length; i++) {
 405
 406                 /* Fill data register */
 407                 val = data[i];
 408                 ret = smsc95xx_write_reg(dev, E2P_DATA, val);
 409                 if (ret < 0) {
 410                         netdev_warn(dev->net, "Error writing E2P_DATA\n");
 411                         return ret;
 412                 }
 413
 414                 /* Send "write" command */
 415                 val = E2P_CMD_BUSY_ | E2P_CMD_WRITE_ | (offset & E2P_CMD_ADDR_);
 416                 ret = smsc95xx_write_reg(dev, E2P_CMD, val);
 417                 if (ret < 0) {
 418                         netdev_warn(dev->net, "Error writing E2P_CMD\n");
 419                         return ret;
 420                 }
 421
 422                 ret = smsc95xx_wait_eeprom(dev);
 423                 if (ret < 0)
 424                         return ret;
 425
 426                 offset++;
 427         }
 428
 429         return 0;
 430 }
 431
 432 static int __must_check smsc95xx_write_reg_async(struct usbnet *dev, u16 index,
 433                                                  u32 data)
 434 {
 435         const u16 size = 4;
 436         u32 buf;
 437         int ret;
 438
 439         buf = data;
 440         cpu_to_le32s(&buf);
 441
 442         ret = usbnet_write_cmd_async(dev, USB_VENDOR_REQUEST_WRITE_REGISTER,
 443                                      USB_DIR_OUT | USB_TYPE_VENDOR |
 444                                      USB_RECIP_DEVICE,
 445                                      0, index, &buf, size);
 446         if (ret < 0)
 447                 netdev_warn(dev->net, "Error write async cmd, sts=%d\n",
 448                             ret);
 449         return ret;
 450 }
 451
 452 /* returns hash bit number for given MAC address
 453  * example:
 454  * 01 00 5E 00 00 01 -> returns bit number 31 */
 455 static unsigned int smsc95xx_hash(char addr[ETH_ALEN])
 456 {
 457         return (ether_crc(ETH_ALEN, addr) >> 26) & 0x3f;
 458 }
 459
 460 static void smsc95xx_set_multicast(struct net_device *netdev)
 461 {
 462         struct usbnet *dev = netdev_priv(netdev);
 463         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
 464         unsigned long flags;
 465         int ret;
 466
 467         pdata->hash_hi = 0;
 468         pdata->hash_lo = 0;
 469
 470         spin_lock_irqsave(&pdata->mac_cr_lock, flags);
 471
 472         if (dev->net->flags & IFF_PROMISC) {
 473                 netif_dbg(dev, drv, dev->net, "promiscuous mode enabled\n");
 474                 pdata->mac_cr |= MAC_CR_PRMS_;
 475                 pdata->mac_cr &= ~(MAC_CR_MCPAS_ | MAC_CR_HPFILT_);
 476         } else if (dev->net->flags & IFF_ALLMULTI) {
 477                 netif_dbg(dev, drv, dev->net, "receive all multicast enabled\n");
 478                 pdata->mac_cr |= MAC_CR_MCPAS_;
 479                 pdata->mac_cr &= ~(MAC_CR_PRMS_ | MAC_CR_HPFILT_);
 480         } else if (!netdev_mc_empty(dev->net)) {
 481                 struct netdev_hw_addr *ha;
 482
 483                 pdata->mac_cr |= MAC_CR_HPFILT_;
 484                 pdata->mac_cr &= ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_);
 485
 486                 netdev_for_each_mc_addr(ha, netdev) {
 487                         u32 bitnum = smsc95xx_hash(ha->addr);
 488                         u32 mask = 0x01 << (bitnum & 0x1F);
 489                         if (bitnum & 0x20)
 490                                 pdata->hash_hi |= mask;
 491                         else
 492                                 pdata->hash_lo |= mask;
 493                 }
 494
 495                 netif_dbg(dev, drv, dev->net, "HASHH=0x%08X, HASHL=0x%08X\n",
 496                                    pdata->hash_hi, pdata->hash_lo);
 497         } else {
 498                 netif_dbg(dev, drv, dev->net, "receive own packets only\n");
 499                 pdata->mac_cr &=
 500                         ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_ | MAC_CR_HPFILT_);
 501         }
 502
 503         spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
 504
 505         /* Initiate async writes, as we can't wait for completion here */
 506         ret = smsc95xx_write_reg_async(dev, HASHH, pdata->hash_hi);
 507         if (ret < 0)
 508                 netdev_warn(dev->net, "failed to initiate async write to HASHH\n");
 509
 510         ret = smsc95xx_write_reg_async(dev, HASHL, pdata->hash_lo);
 511         if (ret < 0)
 512                 netdev_warn(dev->net, "failed to initiate async write to HASHL\n");
 513
 514         ret = smsc95xx_write_reg_async(dev, MAC_CR, pdata->mac_cr);
 515         if (ret < 0)
 516                 netdev_warn(dev->net, "failed to initiate async write to MAC_CR\n");
 517 }
 518
 519 static int smsc95xx_phy_update_flowcontrol(struct usbnet *dev, u8 duplex,
 520                                            u16 lcladv, u16 rmtadv)
 521 {
 522         u32 flow, afc_cfg = 0;
 523
 524         int ret = smsc95xx_read_reg(dev, AFC_CFG, &afc_cfg);
 525         if (ret < 0)
 526                 return ret;
 527
 528         if (duplex == DUPLEX_FULL) {
 529                 u8 cap = mii_resolve_flowctrl_fdx(lcladv, rmtadv);
 530
 531                 if (cap & FLOW_CTRL_RX)
 532                         flow = 0xFFFF0002;
 533                 else
 534                         flow = 0;
 535
 536                 if (cap & FLOW_CTRL_TX)
 537                         afc_cfg |= 0xF;
 538                 else
 539                         afc_cfg &= ~0xF;
 540
 541                 netif_dbg(dev, link, dev->net, "rx pause %s, tx pause %s\n",
 542                                    cap & FLOW_CTRL_RX ? "enabled" : "disabled",
 543                                    cap & FLOW_CTRL_TX ? "enabled" : "disabled");
 544         } else {
 545                 netif_dbg(dev, link, dev->net, "half duplex\n");
 546                 flow = 0;
 547                 afc_cfg |= 0xF;
 548         }
 549
 550         ret = smsc95xx_write_reg(dev, FLOW, flow);
 551         if (ret < 0)
 552                 return ret;
 553
 554         return smsc95xx_write_reg(dev, AFC_CFG, afc_cfg);
 555 }
 556
 557 static int smsc95xx_link_reset(struct usbnet *dev)
 558 {
 559         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
 560         struct mii_if_info *mii = &dev->mii;
 561         struct ethtool_cmd ecmd = { .cmd = ETHTOOL_GSET };
 562         unsigned long flags;
 563         u16 lcladv, rmtadv;
 564         int ret;
 565
 566         /* clear interrupt status */
 567         ret = smsc95xx_mdio_read(dev->net, mii->phy_id, PHY_INT_SRC);
 568         if (ret < 0)
 569                 return ret;
 570
 571         ret = smsc95xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL_);
 572         if (ret < 0)
 573                 return ret;
 574
 575         mii_check_media(mii, 1, 1);
 576         mii_ethtool_gset(&dev->mii, &ecmd);
 577         lcladv = smsc95xx_mdio_read(dev->net, mii->phy_id, MII_ADVERTISE);
 578         rmtadv = smsc95xx_mdio_read(dev->net, mii->phy_id, MII_LPA);
 579
 580         netif_dbg(dev, link, dev->net,
 581                   "speed: %u duplex: %d lcladv: %04x rmtadv: %04x\n",
 582                   ethtool_cmd_speed(&ecmd), ecmd.duplex, lcladv, rmtadv);
 583
 584         spin_lock_irqsave(&pdata->mac_cr_lock, flags);
 585         if (ecmd.duplex != DUPLEX_FULL) {
 586                 pdata->mac_cr &= ~MAC_CR_FDPX_;
 587                 pdata->mac_cr |= MAC_CR_RCVOWN_;
 588         } else {
 589                 pdata->mac_cr &= ~MAC_CR_RCVOWN_;
 590                 pdata->mac_cr |= MAC_CR_FDPX_;
 591         }
 592         spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
 593
 594         ret = smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr);
 595         if (ret < 0)
 596                 return ret;
 597
 598         ret = smsc95xx_phy_update_flowcontrol(dev, ecmd.duplex, lcladv, rmtadv);
 599         if (ret < 0)
 600                 netdev_warn(dev->net, "Error updating PHY flow control\n");
 601
 602         return ret;
 603 }
 604
 605 static void smsc95xx_status(struct usbnet *dev, struct urb *urb)
 606 {
 607         u32 intdata;
 608
 609         if (urb->actual_length != 4) {
 610                 netdev_warn(dev->net, "unexpected urb length %d\n",
 611                             urb->actual_length);
 612                 return;
 613         }
 614
 615         memcpy(&intdata, urb->transfer_buffer, 4);
 616         le32_to_cpus(&intdata);
 617
 618         netif_dbg(dev, link, dev->net, "intdata: 0x%08X\n", intdata);
 619
 620         if (intdata & INT_ENP_PHY_INT_)
 621                 usbnet_defer_kevent(dev, EVENT_LINK_RESET);
 622         else
 623                 netdev_warn(dev->net, "unexpected interrupt, intdata=0x%08X\n",
 624                             intdata);
 625 }
 626
 627 /* Enable or disable Tx & Rx checksum offload engines */
 628 static int smsc95xx_set_features(struct net_device *netdev,
 629         netdev_features_t features)
 630 {
 631         struct usbnet *dev = netdev_priv(netdev);
 632         u32 read_buf;
 633         int ret;
 634
 635         ret = smsc95xx_read_reg(dev, COE_CR, &read_buf);
 636         if (ret < 0)
 637                 return ret;
 638
 639         if (features & NETIF_F_HW_CSUM)
 640                 read_buf |= Tx_COE_EN_;
 641         else
 642                 read_buf &= ~Tx_COE_EN_;
 643
 644         if (features & NETIF_F_RXCSUM)
 645                 read_buf |= Rx_COE_EN_;
 646         else
 647                 read_buf &= ~Rx_COE_EN_;
 648
 649         ret = smsc95xx_write_reg(dev, COE_CR, read_buf);
 650         if (ret < 0)
 651                 return ret;
 652
 653         netif_dbg(dev, hw, dev->net, "COE_CR = 0x%08x\n", read_buf);
 654         return 0;
 655 }
 656
 657 static int smsc95xx_ethtool_get_eeprom_len(struct net_device *net)
 658 {
 659         return MAX_EEPROM_SIZE;
 660 }
 661
 662 static int smsc95xx_ethtool_get_eeprom(struct net_device *netdev,
 663                                        struct ethtool_eeprom *ee, u8 *data)
 664 {
 665         struct usbnet *dev = netdev_priv(netdev);
 666
 667         ee->magic = LAN95XX_EEPROM_MAGIC;
 668
 669         return smsc95xx_read_eeprom(dev, ee->offset, ee->len, data);
 670 }
 671
 672 static int smsc95xx_ethtool_set_eeprom(struct net_device *netdev,
 673                                        struct ethtool_eeprom *ee, u8 *data)
 674 {
 675         struct usbnet *dev = netdev_priv(netdev);
 676
 677         if (ee->magic != LAN95XX_EEPROM_MAGIC) {
 678                 netdev_warn(dev->net, "EEPROM: magic value mismatch, magic = 0x%x\n",
 679                             ee->magic);
 680                 return -EINVAL;
 681         }
 682
 683         return smsc95xx_write_eeprom(dev, ee->offset, ee->len, data);
 684 }
 685
 686 static int smsc95xx_ethtool_getregslen(struct net_device *netdev)
 687 {
 688         /* all smsc95xx registers */
 689         return COE_CR - ID_REV + sizeof(u32);
 690 }
 691
 692 static void
 693 smsc95xx_ethtool_getregs(struct net_device *netdev, struct ethtool_regs *regs,
 694                          void *buf)
 695 {
 696         struct usbnet *dev = netdev_priv(netdev);
 697         unsigned int i, j;
 698         int retval;
 699         u32 *data = buf;
 700
 701         retval = smsc95xx_read_reg(dev, ID_REV, &regs->version);
 702         if (retval < 0) {
 703                 netdev_warn(netdev, "REGS: cannot read ID_REV\n");
 704                 return;
 705         }
 706
 707         for (i = ID_REV, j = 0; i <= COE_CR; i += (sizeof(u32)), j++) {
 708                 retval = smsc95xx_read_reg(dev, i, &data[j]);
 709                 if (retval < 0) {
 710                         netdev_warn(netdev, "REGS: cannot read reg[%x]\n", i);
 711                         return;
 712                 }
 713         }
 714 }
 715
 716 static void smsc95xx_ethtool_get_wol(struct net_device *net,
 717                                      struct ethtool_wolinfo *wolinfo)
 718 {
 719         struct usbnet *dev = netdev_priv(net);
 720         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
 721
 722         wolinfo->supported = SUPPORTED_WAKE;
 723         wolinfo->wolopts = pdata->wolopts;
 724 }
 725
 726 static int smsc95xx_ethtool_set_wol(struct net_device *net,
 727                                     struct ethtool_wolinfo *wolinfo)
 728 {
 729         struct usbnet *dev = netdev_priv(net);
 730         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
 731         int ret;
 732
 733         pdata->wolopts = wolinfo->wolopts & SUPPORTED_WAKE;
 734
 735         ret = device_set_wakeup_enable(&dev->udev->dev, pdata->wolopts);
 736         if (ret < 0)
 737                 netdev_warn(dev->net, "device_set_wakeup_enable error %d\n", ret);
 738
 739         return ret;
 740 }
 741
 742 static const struct ethtool_ops smsc95xx_ethtool_ops = {
 743         .get_link       = usbnet_get_link,
 744         .nway_reset     = usbnet_nway_reset,
 745         .get_drvinfo    = usbnet_get_drvinfo,
 746         .get_msglevel   = usbnet_get_msglevel,
 747         .set_msglevel   = usbnet_set_msglevel,
 748         .get_settings   = usbnet_get_settings,
 749         .set_settings   = usbnet_set_settings,
 750         .get_eeprom_len = smsc95xx_ethtool_get_eeprom_len,
 751         .get_eeprom     = smsc95xx_ethtool_get_eeprom,
 752         .set_eeprom     = smsc95xx_ethtool_set_eeprom,
 753         .get_regs_len   = smsc95xx_ethtool_getregslen,
 754         .get_regs       = smsc95xx_ethtool_getregs,
 755         .get_wol        = smsc95xx_ethtool_get_wol,
 756         .set_wol        = smsc95xx_ethtool_set_wol,
 757 };
 758
 759 static int smsc95xx_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
 760 {
 761         struct usbnet *dev = netdev_priv(netdev);
 762
 763         if (!netif_running(netdev))
 764                 return -EINVAL;
 765
 766         return generic_mii_ioctl(&dev->mii, if_mii(rq), cmd, NULL);
 767 }
 768
 769 static void smsc95xx_init_mac_address(struct usbnet *dev)
 770 {
 771         const u8 *mac_addr;
 772
 773         /* maybe the boot loader passed the MAC address in devicetree */
 774         mac_addr = of_get_mac_address(dev->udev->dev.of_node);
 775         if (mac_addr) {
 776                 memcpy(dev->net->dev_addr, mac_addr, ETH_ALEN);
 777                 return;
 778         }
 779
 780         /* try reading mac address from EEPROM */
 781         if (smsc95xx_read_eeprom(dev, EEPROM_MAC_OFFSET, ETH_ALEN,
 782                         dev->net->dev_addr) == 0) {
 783                 if (is_valid_ether_addr(dev->net->dev_addr)) {
 784                         /* eeprom values are valid so use them */
 785                         netif_dbg(dev, ifup, dev->net, "MAC address read from EEPROM\n");
 786                         return;
 787                 }
 788         }
 789
 790         /* no useful static MAC address found. generate a random one */
 791         eth_hw_addr_random(dev->net);
 792         netif_dbg(dev, ifup, dev->net, "MAC address set to eth_random_addr\n");
 793 }
 794
 795 static int smsc95xx_set_mac_address(struct usbnet *dev)
 796 {
 797         u32 addr_lo = dev->net->dev_addr[0] | dev->net->dev_addr[1] << 8 |
 798                 dev->net->dev_addr[2] << 16 | dev->net->dev_addr[3] << 24;
 799         u32 addr_hi = dev->net->dev_addr[4] | dev->net->dev_addr[5] << 8;
 800         int ret;
 801
 802         ret = smsc95xx_write_reg(dev, ADDRL, addr_lo);
 803         if (ret < 0)
 804                 return ret;
 805
 806         return smsc95xx_write_reg(dev, ADDRH, addr_hi);
 807 }
 808
 809 /* starts the TX path */
 810 static int smsc95xx_start_tx_path(struct usbnet *dev)
 811 {
 812         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
 813         unsigned long flags;
 814         int ret;
 815
 816         /* Enable Tx at MAC */
 817         spin_lock_irqsave(&pdata->mac_cr_lock, flags);
 818         pdata->mac_cr |= MAC_CR_TXEN_;
 819         spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
 820
 821         ret = smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr);
 822         if (ret < 0)
 823                 return ret;
 824
 825         /* Enable Tx at SCSRs */
 826         return smsc95xx_write_reg(dev, TX_CFG, TX_CFG_ON_);
 827 }
 828
 829 /* Starts the Receive path */
 830 static int smsc95xx_start_rx_path(struct usbnet *dev, int in_pm)
 831 {
 832         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
 833         unsigned long flags;
 834
 835         spin_lock_irqsave(&pdata->mac_cr_lock, flags);
 836         pdata->mac_cr |= MAC_CR_RXEN_;
 837         spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
 838
 839         return __smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr, in_pm);
 840 }
 841
 842 static int smsc95xx_phy_initialize(struct usbnet *dev)
 843 {
 844         int bmcr, ret, timeout = 0;
 845
 846         /* Initialize MII structure */
 847         dev->mii.dev = dev->net;
 848         dev->mii.mdio_read = smsc95xx_mdio_read;
 849         dev->mii.mdio_write = smsc95xx_mdio_write;
 850         dev->mii.phy_id_mask = 0x1f;
 851         dev->mii.reg_num_mask = 0x1f;
 852         dev->mii.phy_id = SMSC95XX_INTERNAL_PHY_ID;
 853
 854         /* reset phy and wait for reset to complete */
 855         smsc95xx_mdio_write(dev->net, dev->mii.phy_id, MII_BMCR, BMCR_RESET);
 856
 857         do {
 858                 msleep(10);
 859                 bmcr = smsc95xx_mdio_read(dev->net, dev->mii.phy_id, MII_BMCR);
 860                 timeout++;
 861         } while ((bmcr & BMCR_RESET) && (timeout < 100));
 862
 863         if (timeout >= 100) {
 864                 netdev_warn(dev->net, "timeout on PHY Reset");
 865                 return -EIO;
 866         }
 867
 868         smsc95xx_mdio_write(dev->net, dev->mii.phy_id, MII_ADVERTISE,
 869                 ADVERTISE_ALL | ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP |
 870                 ADVERTISE_PAUSE_ASYM);
 871
 872         /* read to clear */
 873         ret = smsc95xx_mdio_read(dev->net, dev->mii.phy_id, PHY_INT_SRC);
 874         if (ret < 0) {
 875                 netdev_warn(dev->net, "Failed to read PHY_INT_SRC during init\n");
 876                 return ret;
 877         }
 878
 879         smsc95xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_MASK,
 880                 PHY_INT_MASK_DEFAULT_);
 881         mii_nway_restart(&dev->mii);
 882
 883         netif_dbg(dev, ifup, dev->net, "phy initialised successfully\n");
 884         return 0;
 885 }
 886
 887 static int smsc95xx_reset(struct usbnet *dev)
 888 {
 889         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
 890         u32 read_buf, write_buf, burst_cap;
 891         int ret = 0, timeout;
 892
 893         netif_dbg(dev, ifup, dev->net, "entering smsc95xx_reset\n");
 894
 895         ret = smsc95xx_write_reg(dev, HW_CFG, HW_CFG_LRST_);
 896         if (ret < 0)
 897                 return ret;
 898
 899         timeout = 0;
 900         do {
 901                 msleep(10);
 902                 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
 903                 if (ret < 0)
 904                         return ret;
 905                 timeout++;
 906         } while ((read_buf & HW_CFG_LRST_) && (timeout < 100));
 907
 908         if (timeout >= 100) {
 909                 netdev_warn(dev->net, "timeout waiting for completion of Lite Reset\n");
 910                 return ret;
 911         }
 912
 913         ret = smsc95xx_write_reg(dev, PM_CTRL, PM_CTL_PHY_RST_);
 914         if (ret < 0)
 915                 return ret;
 916
 917         timeout = 0;
 918         do {
 919                 msleep(10);
 920                 ret = smsc95xx_read_reg(dev, PM_CTRL, &read_buf);
 921                 if (ret < 0)
 922                         return ret;
 923                 timeout++;
 924         } while ((read_buf & PM_CTL_PHY_RST_) && (timeout < 100));
 925
 926         if (timeout >= 100) {
 927                 netdev_warn(dev->net, "timeout waiting for PHY Reset\n");
 928                 return ret;
 929         }
 930
 931         ret = smsc95xx_set_mac_address(dev);
 932         if (ret < 0)
 933                 return ret;
 934
 935         netif_dbg(dev, ifup, dev->net, "MAC Address: %pM\n",
 936                   dev->net->dev_addr);
 937
 938         ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
 939         if (ret < 0)
 940                 return ret;
 941
 942         netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG : 0x%08x\n",
 943                   read_buf);
 944
 945         read_buf |= HW_CFG_BIR_;
 946
 947         ret = smsc95xx_write_reg(dev, HW_CFG, read_buf);
 948         if (ret < 0)
 949                 return ret;
 950
 951         ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
 952         if (ret < 0)
 953                 return ret;
 954
 955         netif_dbg(dev, ifup, dev->net,
 956                   "Read Value from HW_CFG after writing HW_CFG_BIR_: 0x%08x\n",
 957                   read_buf);
 958
 959         if (!turbo_mode) {
 960                 burst_cap = 0;
 961                 dev->rx_urb_size = MAX_SINGLE_PACKET_SIZE;
 962         } else if (dev->udev->speed == USB_SPEED_HIGH) {
 963                 burst_cap = DEFAULT_HS_BURST_CAP_SIZE / HS_USB_PKT_SIZE;
 964                 dev->rx_urb_size = DEFAULT_HS_BURST_CAP_SIZE;
 965         } else {
 966                 burst_cap = DEFAULT_FS_BURST_CAP_SIZE / FS_USB_PKT_SIZE;
 967                 dev->rx_urb_size = DEFAULT_FS_BURST_CAP_SIZE;
 968         }
 969
 970         netif_dbg(dev, ifup, dev->net, "rx_urb_size=%ld\n",
 971                   (ulong)dev->rx_urb_size);
 972
 973         ret = smsc95xx_write_reg(dev, BURST_CAP, burst_cap);
 974         if (ret < 0)
 975                 return ret;
 976
 977         ret = smsc95xx_read_reg(dev, BURST_CAP, &read_buf);
 978         if (ret < 0)
 979                 return ret;
 980
 981         netif_dbg(dev, ifup, dev->net,
 982                   "Read Value from BURST_CAP after writing: 0x%08x\n",
 983                   read_buf);
 984
 985         ret = smsc95xx_write_reg(dev, BULK_IN_DLY, DEFAULT_BULK_IN_DELAY);
 986         if (ret < 0)
 987                 return ret;
 988
 989         ret = smsc95xx_read_reg(dev, BULK_IN_DLY, &read_buf);
 990         if (ret < 0)
 991                 return ret;
 992
 993         netif_dbg(dev, ifup, dev->net,
 994                   "Read Value from BULK_IN_DLY after writing: 0x%08x\n",
 995                   read_buf);
 996
 997         ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
 998         if (ret < 0)
 999                 return ret;
1000
1001         netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG: 0x%08x\n",
1002                   read_buf);
1003
1004         if (turbo_mode)
1005                 read_buf |= (HW_CFG_MEF_ | HW_CFG_BCE_);
1006
1007         read_buf &= ~HW_CFG_RXDOFF_;
1008
1009         /* set Rx data offset=2, Make IP header aligns on word boundary. */
1010         read_buf |= NET_IP_ALIGN << 9;
1011
1012         ret = smsc95xx_write_reg(dev, HW_CFG, read_buf);
1013         if (ret < 0)
1014                 return ret;
1015
1016         ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
1017         if (ret < 0)
1018                 return ret;
1019
1020         netif_dbg(dev, ifup, dev->net,
1021                   "Read Value from HW_CFG after writing: 0x%08x\n", read_buf);
1022
1023         ret = smsc95xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL_);
1024         if (ret < 0)
1025                 return ret;
1026
1027         ret = smsc95xx_read_reg(dev, ID_REV, &read_buf);
1028         if (ret < 0)
1029                 return ret;
1030         netif_dbg(dev, ifup, dev->net, "ID_REV = 0x%08x\n", read_buf);
1031
1032         /* Configure GPIO pins as LED outputs */
1033         write_buf = LED_GPIO_CFG_SPD_LED | LED_GPIO_CFG_LNK_LED |
1034                 LED_GPIO_CFG_FDX_LED;
1035         ret = smsc95xx_write_reg(dev, LED_GPIO_CFG, write_buf);
1036         if (ret < 0)
1037                 return ret;
1038
1039         /* Init Tx */
1040         ret = smsc95xx_write_reg(dev, FLOW, 0);
1041         if (ret < 0)
1042                 return ret;
1043
1044         ret = smsc95xx_write_reg(dev, AFC_CFG, AFC_CFG_DEFAULT);
1045         if (ret < 0)
1046                 return ret;
1047
1048         /* Don't need mac_cr_lock during initialisation */
1049         ret = smsc95xx_read_reg(dev, MAC_CR, &pdata->mac_cr);
1050         if (ret < 0)
1051                 return ret;
1052
1053         /* Init Rx */
1054         /* Set Vlan */
1055         ret = smsc95xx_write_reg(dev, VLAN1, (u32)ETH_P_8021Q);
1056         if (ret < 0)
1057                 return ret;
1058
1059         /* Enable or disable checksum offload engines */
1060         ret = smsc95xx_set_features(dev->net, dev->net->features);
1061         if (ret < 0) {
1062                 netdev_warn(dev->net, "Failed to set checksum offload features\n");
1063                 return ret;
1064         }
1065
1066         smsc95xx_set_multicast(dev->net);
1067
1068         ret = smsc95xx_phy_initialize(dev);
1069         if (ret < 0) {
1070                 netdev_warn(dev->net, "Failed to init PHY\n");
1071                 return ret;
1072         }
1073
1074         ret = smsc95xx_read_reg(dev, INT_EP_CTL, &read_buf);
1075         if (ret < 0)
1076                 return ret;
1077
1078         /* enable PHY interrupts */
1079         read_buf |= INT_EP_CTL_PHY_INT_;
1080
1081         ret = smsc95xx_write_reg(dev, INT_EP_CTL, read_buf);
1082         if (ret < 0)
1083                 return ret;
1084
1085         ret = smsc95xx_start_tx_path(dev);
1086         if (ret < 0) {
1087                 netdev_warn(dev->net, "Failed to start TX path\n");
1088                 return ret;
1089         }
1090
1091         ret = smsc95xx_start_rx_path(dev, 0);
1092         if (ret < 0) {
1093                 netdev_warn(dev->net, "Failed to start RX path\n");
1094                 return ret;
1095         }
1096
1097         netif_dbg(dev, ifup, dev->net, "smsc95xx_reset, return 0\n");
1098         return 0;
1099 }
1100
1101 static const struct net_device_ops smsc95xx_netdev_ops = {
1102         .ndo_open               = usbnet_open,
1103         .ndo_stop               = usbnet_stop,
1104         .ndo_start_xmit         = usbnet_start_xmit,
1105         .ndo_tx_timeout         = usbnet_tx_timeout,
1106         .ndo_change_mtu         = usbnet_change_mtu,
1107         .ndo_set_mac_address    = eth_mac_addr,
1108         .ndo_validate_addr      = eth_validate_addr,
1109         .ndo_do_ioctl           = smsc95xx_ioctl,
1110         .ndo_set_rx_mode        = smsc95xx_set_multicast,
1111         .ndo_set_features       = smsc95xx_set_features,
1112 };
1113
1114 static int smsc95xx_bind(struct usbnet *dev, struct usb_interface *intf)
1115 {
1116         struct smsc95xx_priv *pdata = NULL;
1117         u32 val;
1118         int ret;
1119
1120         printk(KERN_INFO SMSC_CHIPNAME " v" SMSC_DRIVER_VERSION "\n");
1121
1122         ret = usbnet_get_endpoints(dev, intf);
1123         if (ret < 0) {
1124                 netdev_warn(dev->net, "usbnet_get_endpoints failed: %d\n", ret);
1125                 return ret;
1126         }
1127
1128         dev->data[0] = (unsigned long)kzalloc(sizeof(struct smsc95xx_priv),
1129                                               GFP_KERNEL);
1130
1131         pdata = (struct smsc95xx_priv *)(dev->data[0]);
1132         if (!pdata)
1133                 return -ENOMEM;
1134
1135         spin_lock_init(&pdata->mac_cr_lock);
1136
1137         if (DEFAULT_TX_CSUM_ENABLE)
1138                 dev->net->features |= NETIF_F_HW_CSUM;
1139         if (DEFAULT_RX_CSUM_ENABLE)
1140                 dev->net->features |= NETIF_F_RXCSUM;
1141
1142         dev->net->hw_features = NETIF_F_HW_CSUM | NETIF_F_RXCSUM;
1143
1144         smsc95xx_init_mac_address(dev);
1145
1146         /* Init all registers */
1147         ret = smsc95xx_reset(dev);
1148
1149         /* detect device revision as different features may be available */
1150         ret = smsc95xx_read_reg(dev, ID_REV, &val);
1151         if (ret < 0)
1152                 return ret;
1153         val >>= 16;
1154
1155         if ((val == ID_REV_CHIP_ID_9500A_) || (val == ID_REV_CHIP_ID_9530_) ||
1156             (val == ID_REV_CHIP_ID_89530_) || (val == ID_REV_CHIP_ID_9730_))
1157                 pdata->features = (FEATURE_8_WAKEUP_FILTERS |
1158                         FEATURE_PHY_NLP_CROSSOVER |
1159                         FEATURE_REMOTE_WAKEUP);
1160         else if (val == ID_REV_CHIP_ID_9512_)
1161                 pdata->features = FEATURE_8_WAKEUP_FILTERS;
1162
1163         dev->net->netdev_ops = &smsc95xx_netdev_ops;
1164         dev->net->ethtool_ops = &smsc95xx_ethtool_ops;
1165         dev->net->flags |= IFF_MULTICAST;
1166         dev->net->hard_header_len += SMSC95XX_TX_OVERHEAD_CSUM;
1167         dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len;
1168         return 0;
1169 }
1170
1171 static void smsc95xx_unbind(struct usbnet *dev, struct usb_interface *intf)
1172 {
1173         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1174         if (pdata) {
1175                 netif_dbg(dev, ifdown, dev->net, "free pdata\n");
1176                 kfree(pdata);
1177                 pdata = NULL;
1178                 dev->data[0] = 0;
1179         }
1180 }
1181
1182 static u32 smsc_crc(const u8 *buffer, size_t len, int filter)
1183 {
1184         u32 crc = bitrev16(crc16(0xFFFF, buffer, len));
1185         return crc << ((filter % 2) * 16);
1186 }
1187
1188 static int smsc95xx_enable_phy_wakeup_interrupts(struct usbnet *dev, u16 mask)
1189 {
1190         struct mii_if_info *mii = &dev->mii;
1191         int ret;
1192
1193         netdev_dbg(dev->net, "enabling PHY wakeup interrupts\n");
1194
1195         /* read to clear */
1196         ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_SRC);
1197         if (ret < 0)
1198                 return ret;
1199
1200         /* enable interrupt source */
1201         ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_MASK);
1202         if (ret < 0)
1203                 return ret;
1204
1205         ret |= mask;
1206
1207         smsc95xx_mdio_write_nopm(dev->net, mii->phy_id, PHY_INT_MASK, ret);
1208
1209         return 0;
1210 }
1211
1212 static int smsc95xx_link_ok_nopm(struct usbnet *dev)
1213 {
1214         struct mii_if_info *mii = &dev->mii;
1215         int ret;
1216
1217         /* first, a dummy read, needed to latch some MII phys */
1218         ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR);
1219         if (ret < 0)
1220                 return ret;
1221
1222         ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR);
1223         if (ret < 0)
1224                 return ret;
1225
1226         return !!(ret & BMSR_LSTATUS);
1227 }
1228
1229 static int smsc95xx_enter_suspend0(struct usbnet *dev)
1230 {
1231         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1232         u32 val;
1233         int ret;
1234
1235         ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1236         if (ret < 0)
1237                 return ret;
1238
1239         val &= (~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_));
1240         val |= PM_CTL_SUS_MODE_0;
1241
1242         ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1243         if (ret < 0)
1244                 return ret;
1245
1246         /* clear wol status */
1247         val &= ~PM_CTL_WUPS_;
1248         val |= PM_CTL_WUPS_WOL_;
1249
1250         /* enable energy detection */
1251         if (pdata->wolopts & WAKE_PHY)
1252                 val |= PM_CTL_WUPS_ED_;
1253
1254         ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1255         if (ret < 0)
1256                 return ret;
1257
1258         /* read back PM_CTRL */
1259         ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1260         if (ret < 0)
1261                 return ret;
1262
1263         pdata->suspend_flags |= SUSPEND_SUSPEND0;
1264
1265         return 0;
1266 }
1267
1268 static int smsc95xx_enter_suspend1(struct usbnet *dev)
1269 {
1270         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1271         struct mii_if_info *mii = &dev->mii;
1272         u32 val;
1273         int ret;
1274
1275         /* reconfigure link pulse detection timing for
1276          * compatibility with non-standard link partners
1277          */
1278         if (pdata->features & FEATURE_PHY_NLP_CROSSOVER)
1279                 smsc95xx_mdio_write_nopm(dev->net, mii->phy_id, PHY_EDPD_CONFIG,
1280                         PHY_EDPD_CONFIG_DEFAULT);
1281
1282         /* enable energy detect power-down mode */
1283         ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_MODE_CTRL_STS);
1284         if (ret < 0)
1285                 return ret;
1286
1287         ret |= MODE_CTRL_STS_EDPWRDOWN_;
1288
1289         smsc95xx_mdio_write_nopm(dev->net, mii->phy_id, PHY_MODE_CTRL_STS, ret);
1290
1291         /* enter SUSPEND1 mode */
1292         ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1293         if (ret < 0)
1294                 return ret;
1295
1296         val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_);
1297         val |= PM_CTL_SUS_MODE_1;
1298
1299         ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1300         if (ret < 0)
1301                 return ret;
1302
1303         /* clear wol status, enable energy detection */
1304         val &= ~PM_CTL_WUPS_;
1305         val |= (PM_CTL_WUPS_ED_ | PM_CTL_ED_EN_);
1306
1307         ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1308         if (ret < 0)
1309                 return ret;
1310
1311         pdata->suspend_flags |= SUSPEND_SUSPEND1;
1312
1313         return 0;
1314 }
1315
1316 static int smsc95xx_enter_suspend2(struct usbnet *dev)
1317 {
1318         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1319         u32 val;
1320         int ret;
1321
1322         ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1323         if (ret < 0)
1324                 return ret;
1325
1326         val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_);
1327         val |= PM_CTL_SUS_MODE_2;
1328
1329         ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1330         if (ret < 0)
1331                 return ret;
1332
1333         pdata->suspend_flags |= SUSPEND_SUSPEND2;
1334
1335         return 0;
1336 }
1337
1338 static int smsc95xx_enter_suspend3(struct usbnet *dev)
1339 {
1340         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1341         u32 val;
1342         int ret;
1343
1344         ret = smsc95xx_read_reg_nopm(dev, RX_FIFO_INF, &val);
1345         if (ret < 0)
1346                 return ret;
1347
1348         if (val & 0xFFFF) {
1349                 netdev_info(dev->net, "rx fifo not empty in autosuspend\n");
1350                 return -EBUSY;
1351         }
1352
1353         ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1354         if (ret < 0)
1355                 return ret;
1356
1357         val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_);
1358         val |= PM_CTL_SUS_MODE_3 | PM_CTL_RES_CLR_WKP_STS;
1359
1360         ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1361         if (ret < 0)
1362                 return ret;
1363
1364         /* clear wol status */
1365         val &= ~PM_CTL_WUPS_;
1366         val |= PM_CTL_WUPS_WOL_;
1367
1368         ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1369         if (ret < 0)
1370                 return ret;
1371
1372         pdata->suspend_flags |= SUSPEND_SUSPEND3;
1373
1374         return 0;
1375 }
1376
1377 static int smsc95xx_autosuspend(struct usbnet *dev, u32 link_up)
1378 {
1379         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1380         int ret;
1381
1382         if (!netif_running(dev->net)) {
1383                 /* interface is ifconfig down so fully power down hw */
1384                 netdev_dbg(dev->net, "autosuspend entering SUSPEND2\n");
1385                 return smsc95xx_enter_suspend2(dev);
1386         }
1387
1388         if (!link_up) {
1389                 /* link is down so enter EDPD mode, but only if device can
1390                  * reliably resume from it.  This check should be redundant
1391                  * as current FEATURE_REMOTE_WAKEUP parts also support
1392                  * FEATURE_PHY_NLP_CROSSOVER but it's included for clarity */
1393                 if (!(pdata->features & FEATURE_PHY_NLP_CROSSOVER)) {
1394                         netdev_warn(dev->net, "EDPD not supported\n");
1395                         return -EBUSY;
1396                 }
1397
1398                 netdev_dbg(dev->net, "autosuspend entering SUSPEND1\n");
1399
1400                 /* enable PHY wakeup events for if cable is attached */
1401                 ret = smsc95xx_enable_phy_wakeup_interrupts(dev,
1402                         PHY_INT_MASK_ANEG_COMP_);
1403                 if (ret < 0) {
1404                         netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1405                         return ret;
1406                 }
1407
1408                 netdev_info(dev->net, "entering SUSPEND1 mode\n");
1409                 return smsc95xx_enter_suspend1(dev);
1410         }
1411
1412         /* enable PHY wakeup events so we remote wakeup if cable is pulled */
1413         ret = smsc95xx_enable_phy_wakeup_interrupts(dev,
1414                 PHY_INT_MASK_LINK_DOWN_);
1415         if (ret < 0) {
1416                 netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1417                 return ret;
1418         }
1419
1420         netdev_dbg(dev->net, "autosuspend entering SUSPEND3\n");
1421         return smsc95xx_enter_suspend3(dev);
1422 }
1423
1424 static int smsc95xx_suspend(struct usb_interface *intf, pm_message_t message)
1425 {
1426         struct usbnet *dev = usb_get_intfdata(intf);
1427         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1428         u32 val, link_up;
1429         int ret;
1430
1431         ret = usbnet_suspend(intf, message);
1432         if (ret < 0) {
1433                 netdev_warn(dev->net, "usbnet_suspend error\n");
1434                 return ret;
1435         }
1436
1437         if (pdata->suspend_flags) {
1438                 netdev_warn(dev->net, "error during last resume\n");
1439                 pdata->suspend_flags = 0;
1440         }
1441
1442         /* determine if link is up using only _nopm functions */
1443         link_up = smsc95xx_link_ok_nopm(dev);
1444
1445         if (message.event == PM_EVENT_AUTO_SUSPEND &&
1446             (pdata->features & FEATURE_REMOTE_WAKEUP)) {
1447                 ret = smsc95xx_autosuspend(dev, link_up);
1448                 goto done;
1449         }
1450
1451         /* if we get this far we're not autosuspending */
1452         /* if no wol options set, or if link is down and we're not waking on
1453          * PHY activity, enter lowest power SUSPEND2 mode
1454          */
1455         if (!(pdata->wolopts & SUPPORTED_WAKE) ||
1456                 !(link_up || (pdata->wolopts & WAKE_PHY))) {
1457                 netdev_info(dev->net, "entering SUSPEND2 mode\n");
1458
1459                 /* disable energy detect (link up) & wake up events */
1460                 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val);
1461                 if (ret < 0)
1462                         goto done;
1463
1464                 val &= ~(WUCSR_MPEN_ | WUCSR_WAKE_EN_);
1465
1466                 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val);
1467                 if (ret < 0)
1468                         goto done;
1469
1470                 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1471                 if (ret < 0)
1472                         goto done;
1473
1474                 val &= ~(PM_CTL_ED_EN_ | PM_CTL_WOL_EN_);
1475
1476                 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1477                 if (ret < 0)
1478                         goto done;
1479
1480                 ret = smsc95xx_enter_suspend2(dev);
1481                 goto done;
1482         }
1483
1484         if (pdata->wolopts & WAKE_PHY) {
1485                 ret = smsc95xx_enable_phy_wakeup_interrupts(dev,
1486                         (PHY_INT_MASK_ANEG_COMP_ | PHY_INT_MASK_LINK_DOWN_));
1487                 if (ret < 0) {
1488                         netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1489                         goto done;
1490                 }
1491
1492                 /* if link is down then configure EDPD and enter SUSPEND1,
1493                  * otherwise enter SUSPEND0 below
1494                  */
1495                 if (!link_up) {
1496                         netdev_info(dev->net, "entering SUSPEND1 mode\n");
1497                         ret = smsc95xx_enter_suspend1(dev);
1498                         goto done;
1499                 }
1500         }
1501
1502         if (pdata->wolopts & (WAKE_BCAST | WAKE_MCAST | WAKE_ARP | WAKE_UCAST)) {
1503                 u32 *filter_mask = kzalloc(sizeof(u32) * 32, GFP_KERNEL);
1504                 u32 command[2];
1505                 u32 offset[2];
1506                 u32 crc[4];
1507                 int wuff_filter_count =
1508                         (pdata->features & FEATURE_8_WAKEUP_FILTERS) ?
1509                         LAN9500A_WUFF_NUM : LAN9500_WUFF_NUM;
1510                 int i, filter = 0;
1511
1512                 if (!filter_mask) {
1513                         netdev_warn(dev->net, "Unable to allocate filter_mask\n");
1514                         ret = -ENOMEM;
1515                         goto done;
1516                 }
1517
1518                 memset(command, 0, sizeof(command));
1519                 memset(offset, 0, sizeof(offset));
1520                 memset(crc, 0, sizeof(crc));
1521
1522                 if (pdata->wolopts & WAKE_BCAST) {
1523                         const u8 bcast[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
1524                         netdev_info(dev->net, "enabling broadcast detection\n");
1525                         filter_mask[filter * 4] = 0x003F;
1526                         filter_mask[filter * 4 + 1] = 0x00;
1527                         filter_mask[filter * 4 + 2] = 0x00;
1528                         filter_mask[filter * 4 + 3] = 0x00;
1529                         command[filter/4] |= 0x05UL << ((filter % 4) * 8);
1530                         offset[filter/4] |= 0x00 << ((filter % 4) * 8);
1531                         crc[filter/2] |= smsc_crc(bcast, 6, filter);
1532                         filter++;
1533                 }
1534
1535                 if (pdata->wolopts & WAKE_MCAST) {
1536                         const u8 mcast[] = {0x01, 0x00, 0x5E};
1537                         netdev_info(dev->net, "enabling multicast detection\n");
1538                         filter_mask[filter * 4] = 0x0007;
1539                         filter_mask[filter * 4 + 1] = 0x00;
1540                         filter_mask[filter * 4 + 2] = 0x00;
1541                         filter_mask[filter * 4 + 3] = 0x00;
1542                         command[filter/4] |= 0x09UL << ((filter % 4) * 8);
1543                         offset[filter/4] |= 0x00  << ((filter % 4) * 8);
1544                         crc[filter/2] |= smsc_crc(mcast, 3, filter);
1545                         filter++;
1546                 }
1547
1548                 if (pdata->wolopts & WAKE_ARP) {
1549                         const u8 arp[] = {0x08, 0x06};
1550                         netdev_info(dev->net, "enabling ARP detection\n");
1551                         filter_mask[filter * 4] = 0x0003;
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] |= 0x05UL << ((filter % 4) * 8);
1556                         offset[filter/4] |= 0x0C << ((filter % 4) * 8);
1557                         crc[filter/2] |= smsc_crc(arp, 2, filter);
1558                         filter++;
1559                 }
1560
1561                 if (pdata->wolopts & WAKE_UCAST) {
1562                         netdev_info(dev->net, "enabling unicast detection\n");
1563                         filter_mask[filter * 4] = 0x003F;
1564                         filter_mask[filter * 4 + 1] = 0x00;
1565                         filter_mask[filter * 4 + 2] = 0x00;
1566                         filter_mask[filter * 4 + 3] = 0x00;
1567                         command[filter/4] |= 0x01UL << ((filter % 4) * 8);
1568                         offset[filter/4] |= 0x00 << ((filter % 4) * 8);
1569                         crc[filter/2] |= smsc_crc(dev->net->dev_addr, ETH_ALEN, filter);
1570                         filter++;
1571                 }
1572
1573                 for (i = 0; i < (wuff_filter_count * 4); i++) {
1574                         ret = smsc95xx_write_reg_nopm(dev, WUFF, filter_mask[i]);
1575                         if (ret < 0) {
1576                                 kfree(filter_mask);
1577                                 goto done;
1578                         }
1579                 }
1580                 kfree(filter_mask);
1581
1582                 for (i = 0; i < (wuff_filter_count / 4); i++) {
1583                         ret = smsc95xx_write_reg_nopm(dev, WUFF, command[i]);
1584                         if (ret < 0)
1585                                 goto done;
1586                 }
1587
1588                 for (i = 0; i < (wuff_filter_count / 4); i++) {
1589                         ret = smsc95xx_write_reg_nopm(dev, WUFF, offset[i]);
1590                         if (ret < 0)
1591                                 goto done;
1592                 }
1593
1594                 for (i = 0; i < (wuff_filter_count / 2); i++) {
1595                         ret = smsc95xx_write_reg_nopm(dev, WUFF, crc[i]);
1596                         if (ret < 0)
1597                                 goto done;
1598                 }
1599
1600                 /* clear any pending pattern match packet status */
1601                 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val);
1602                 if (ret < 0)
1603                         goto done;
1604
1605                 val |= WUCSR_WUFR_;
1606
1607                 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val);
1608                 if (ret < 0)
1609                         goto done;
1610         }
1611
1612         if (pdata->wolopts & WAKE_MAGIC) {
1613                 /* clear any pending magic packet status */
1614                 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val);
1615                 if (ret < 0)
1616                         goto done;
1617
1618                 val |= WUCSR_MPR_;
1619
1620                 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val);
1621                 if (ret < 0)
1622                         goto done;
1623         }
1624
1625         /* enable/disable wakeup sources */
1626         ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val);
1627         if (ret < 0)
1628                 goto done;
1629
1630         if (pdata->wolopts & (WAKE_BCAST | WAKE_MCAST | WAKE_ARP | WAKE_UCAST)) {
1631                 netdev_info(dev->net, "enabling pattern match wakeup\n");
1632                 val |= WUCSR_WAKE_EN_;
1633         } else {
1634                 netdev_info(dev->net, "disabling pattern match wakeup\n");
1635                 val &= ~WUCSR_WAKE_EN_;
1636         }
1637
1638         if (pdata->wolopts & WAKE_MAGIC) {
1639                 netdev_info(dev->net, "enabling magic packet wakeup\n");
1640                 val |= WUCSR_MPEN_;
1641         } else {
1642                 netdev_info(dev->net, "disabling magic packet wakeup\n");
1643                 val &= ~WUCSR_MPEN_;
1644         }
1645
1646         ret = smsc95xx_write_reg_nopm(dev, WUCSR, val);
1647         if (ret < 0)
1648                 goto done;
1649
1650         /* enable wol wakeup source */
1651         ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1652         if (ret < 0)
1653                 goto done;
1654
1655         val |= PM_CTL_WOL_EN_;
1656
1657         /* phy energy detect wakeup source */
1658         if (pdata->wolopts & WAKE_PHY)
1659                 val |= PM_CTL_ED_EN_;
1660
1661         ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1662         if (ret < 0)
1663                 goto done;
1664
1665         /* enable receiver to enable frame reception */
1666         smsc95xx_start_rx_path(dev, 1);
1667
1668         /* some wol options are enabled, so enter SUSPEND0 */
1669         netdev_info(dev->net, "entering SUSPEND0 mode\n");
1670         ret = smsc95xx_enter_suspend0(dev);
1671
1672 done:
1673         /*
1674          * TODO: resume() might need to handle the suspend failure
1675          * in system sleep
1676          */
1677         if (ret && PMSG_IS_AUTO(message))
1678                 usbnet_resume(intf);
1679         return ret;
1680 }
1681
1682 static int smsc95xx_resume(struct usb_interface *intf)
1683 {
1684         struct usbnet *dev = usb_get_intfdata(intf);
1685         struct smsc95xx_priv *pdata;
1686         u8 suspend_flags;
1687         int ret;
1688         u32 val;
1689
1690         BUG_ON(!dev);
1691         pdata = (struct smsc95xx_priv *)(dev->data[0]);
1692         suspend_flags = pdata->suspend_flags;
1693
1694         netdev_dbg(dev->net, "resume suspend_flags=0x%02x\n", suspend_flags);
1695
1696         /* do this first to ensure it's cleared even in error case */
1697         pdata->suspend_flags = 0;
1698
1699         if (suspend_flags & SUSPEND_ALLMODES) {
1700                 /* clear wake-up sources */
1701                 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val);
1702                 if (ret < 0)
1703                         return ret;
1704
1705                 val &= ~(WUCSR_WAKE_EN_ | WUCSR_MPEN_);
1706
1707                 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val);
1708                 if (ret < 0)
1709                         return ret;
1710
1711                 /* clear wake-up status */
1712                 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1713                 if (ret < 0)
1714                         return ret;
1715
1716                 val &= ~PM_CTL_WOL_EN_;
1717                 val |= PM_CTL_WUPS_;
1718
1719                 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1720                 if (ret < 0)
1721                         return ret;
1722         }
1723
1724         ret = usbnet_resume(intf);
1725         if (ret < 0)
1726                 netdev_warn(dev->net, "usbnet_resume error\n");
1727
1728         return ret;
1729 }
1730
1731 static int smsc95xx_reset_resume(struct usb_interface *intf)
1732 {
1733         struct usbnet *dev = usb_get_intfdata(intf);
1734         int ret;
1735
1736         ret = smsc95xx_reset(dev);
1737         if (ret < 0)
1738                 return ret;
1739
1740         return smsc95xx_resume(intf);
1741 }
1742
1743 static void smsc95xx_rx_csum_offload(struct sk_buff *skb)
1744 {
1745         skb->csum = *(u16 *)(skb_tail_pointer(skb) - 2);
1746         skb->ip_summed = CHECKSUM_COMPLETE;
1747         skb_trim(skb, skb->len - 2);
1748 }
1749
1750 static int smsc95xx_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
1751 {
1752         /* This check is no longer done by usbnet */
1753         if (skb->len < dev->net->hard_header_len)
1754                 return 0;
1755
1756         while (skb->len > 0) {
1757                 u32 header, align_count;
1758                 struct sk_buff *ax_skb;
1759                 unsigned char *packet;
1760                 u16 size;
1761
1762                 memcpy(&header, skb->data, sizeof(header));
1763                 le32_to_cpus(&header);
1764                 skb_pull(skb, 4 + NET_IP_ALIGN);
1765                 packet = skb->data;
1766
1767                 /* get the packet length */
1768                 size = (u16)((header & RX_STS_FL_) >> 16);
1769                 align_count = (4 - ((size + NET_IP_ALIGN) % 4)) % 4;
1770
1771                 if (unlikely(header & RX_STS_ES_)) {
1772                         netif_dbg(dev, rx_err, dev->net,
1773                                   "Error header=0x%08x\n", header);
1774                         dev->net->stats.rx_errors++;
1775                         dev->net->stats.rx_dropped++;
1776
1777                         if (header & RX_STS_CRC_) {
1778                                 dev->net->stats.rx_crc_errors++;
1779                         } else {
1780                                 if (header & (RX_STS_TL_ | RX_STS_RF_))
1781                                         dev->net->stats.rx_frame_errors++;
1782
1783                                 if ((header & RX_STS_LE_) &&
1784                                         (!(header & RX_STS_FT_)))
1785                                         dev->net->stats.rx_length_errors++;
1786                         }
1787                 } else {
1788                         /* ETH_FRAME_LEN + 4(CRC) + 2(COE) + 4(Vlan) */
1789                         if (unlikely(size > (ETH_FRAME_LEN + 12))) {
1790                                 netif_dbg(dev, rx_err, dev->net,
1791                                           "size err header=0x%08x\n", header);
1792                                 return 0;
1793                         }
1794
1795                         /* last frame in this batch */
1796                         if (skb->len == size) {
1797                                 if (dev->net->features & NETIF_F_RXCSUM)
1798                                         smsc95xx_rx_csum_offload(skb);
1799                                 skb_trim(skb, skb->len - 4); /* remove fcs */
1800                                 skb->truesize = size + sizeof(struct sk_buff);
1801
1802                                 return 1;
1803                         }
1804
1805                         ax_skb = skb_clone(skb, GFP_ATOMIC);
1806                         if (unlikely(!ax_skb)) {
1807                                 netdev_warn(dev->net, "Error allocating skb\n");
1808                                 return 0;
1809                         }
1810
1811                         ax_skb->len = size;
1812                         ax_skb->data = packet;
1813                         skb_set_tail_pointer(ax_skb, size);
1814
1815                         if (dev->net->features & NETIF_F_RXCSUM)
1816                                 smsc95xx_rx_csum_offload(ax_skb);
1817                         skb_trim(ax_skb, ax_skb->len - 4); /* remove fcs */
1818                         ax_skb->truesize = size + sizeof(struct sk_buff);
1819
1820                         usbnet_skb_return(dev, ax_skb);
1821                 }
1822
1823                 skb_pull(skb, size);
1824
1825                 /* padding bytes before the next frame starts */
1826                 if (skb->len)
1827                         skb_pull(skb, align_count);
1828         }
1829
1830         return 1;
1831 }
1832
1833 static u32 smsc95xx_calc_csum_preamble(struct sk_buff *skb)
1834 {
1835         u16 low_16 = (u16)skb_checksum_start_offset(skb);
1836         u16 high_16 = low_16 + skb->csum_offset;
1837         return (high_16 << 16) | low_16;
1838 }
1839
1840 static struct sk_buff *smsc95xx_tx_fixup(struct usbnet *dev,
1841                                          struct sk_buff *skb, gfp_t flags)
1842 {
1843         bool csum = skb->ip_summed == CHECKSUM_PARTIAL;
1844         int overhead = csum ? SMSC95XX_TX_OVERHEAD_CSUM : SMSC95XX_TX_OVERHEAD;
1845         u32 tx_cmd_a, tx_cmd_b;
1846
1847         /* We do not advertise SG, so skbs should be already linearized */
1848         BUG_ON(skb_shinfo(skb)->nr_frags);
1849
1850         if (skb_headroom(skb) < overhead) {
1851                 struct sk_buff *skb2 = skb_copy_expand(skb,
1852                         overhead, 0, flags);
1853                 dev_kfree_skb_any(skb);
1854                 skb = skb2;
1855                 if (!skb)
1856                         return NULL;
1857         }
1858
1859         if (csum) {
1860                 if (skb->len <= 45) {
1861                         /* workaround - hardware tx checksum does not work
1862                          * properly with extremely small packets */
1863                         long csstart = skb_checksum_start_offset(skb);
1864                         __wsum calc = csum_partial(skb->data + csstart,
1865                                 skb->len - csstart, 0);
1866                         *((__sum16 *)(skb->data + csstart
1867                                 + skb->csum_offset)) = csum_fold(calc);
1868
1869                         csum = false;
1870                 } else {
1871                         u32 csum_preamble = smsc95xx_calc_csum_preamble(skb);
1872                         skb_push(skb, 4);
1873                         cpu_to_le32s(&csum_preamble);
1874                         memcpy(skb->data, &csum_preamble, 4);
1875                 }
1876         }
1877
1878         skb_push(skb, 4);
1879         tx_cmd_b = (u32)(skb->len - 4);
1880         if (csum)
1881                 tx_cmd_b |= TX_CMD_B_CSUM_ENABLE;
1882         cpu_to_le32s(&tx_cmd_b);
1883         memcpy(skb->data, &tx_cmd_b, 4);
1884
1885         skb_push(skb, 4);
1886         tx_cmd_a = (u32)(skb->len - 8) | TX_CMD_A_FIRST_SEG_ |
1887                 TX_CMD_A_LAST_SEG_;
1888         cpu_to_le32s(&tx_cmd_a);
1889         memcpy(skb->data, &tx_cmd_a, 4);
1890
1891         return skb;
1892 }
1893
1894 static int smsc95xx_manage_power(struct usbnet *dev, int on)
1895 {
1896         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1897
1898         dev->intf->needs_remote_wakeup = on;
1899
1900         if (pdata->features & FEATURE_REMOTE_WAKEUP)
1901                 return 0;
1902
1903         /* this chip revision isn't capable of remote wakeup */
1904         netdev_info(dev->net, "hardware isn't capable of remote wakeup\n");
1905
1906         if (on)
1907                 usb_autopm_get_interface_no_resume(dev->intf);
1908         else
1909                 usb_autopm_put_interface(dev->intf);
1910
1911         return 0;
1912 }
1913
1914 static const struct driver_info smsc95xx_info = {
1915         .description    = "smsc95xx USB 2.0 Ethernet",
1916         .bind           = smsc95xx_bind,
1917         .unbind         = smsc95xx_unbind,
1918         .link_reset     = smsc95xx_link_reset,
1919         .reset          = smsc95xx_reset,
1920         .rx_fixup       = smsc95xx_rx_fixup,
1921         .tx_fixup       = smsc95xx_tx_fixup,
1922         .status         = smsc95xx_status,
1923         .manage_power   = smsc95xx_manage_power,
1924         .flags          = FLAG_ETHER | FLAG_SEND_ZLP | FLAG_LINK_INTR,
1925 };
1926
1927 static const struct usb_device_id products[] = {
1928         {
1929                 /* SMSC9500 USB Ethernet Device */
1930                 USB_DEVICE(0x0424, 0x9500),
1931                 .driver_info = (unsigned long) &smsc95xx_info,
1932         },
1933         {
1934                 /* SMSC9505 USB Ethernet Device */
1935                 USB_DEVICE(0x0424, 0x9505),
1936                 .driver_info = (unsigned long) &smsc95xx_info,
1937         },
1938         {
1939                 /* SMSC9500A USB Ethernet Device */
1940                 USB_DEVICE(0x0424, 0x9E00),
1941                 .driver_info = (unsigned long) &smsc95xx_info,
1942         },
1943         {
1944                 /* SMSC9505A USB Ethernet Device */
1945                 USB_DEVICE(0x0424, 0x9E01),
1946                 .driver_info = (unsigned long) &smsc95xx_info,
1947         },
1948         {
1949                 /* SMSC9512/9514 USB Hub & Ethernet Device */
1950                 USB_DEVICE(0x0424, 0xec00),
1951                 .driver_info = (unsigned long) &smsc95xx_info,
1952         },
1953         {
1954                 /* SMSC9500 USB Ethernet Device (SAL10) */
1955                 USB_DEVICE(0x0424, 0x9900),
1956                 .driver_info = (unsigned long) &smsc95xx_info,
1957         },
1958         {
1959                 /* SMSC9505 USB Ethernet Device (SAL10) */
1960                 USB_DEVICE(0x0424, 0x9901),
1961                 .driver_info = (unsigned long) &smsc95xx_info,
1962         },
1963         {
1964                 /* SMSC9500A USB Ethernet Device (SAL10) */
1965                 USB_DEVICE(0x0424, 0x9902),
1966                 .driver_info = (unsigned long) &smsc95xx_info,
1967         },
1968         {
1969                 /* SMSC9505A USB Ethernet Device (SAL10) */
1970                 USB_DEVICE(0x0424, 0x9903),
1971                 .driver_info = (unsigned long) &smsc95xx_info,
1972         },
1973         {
1974                 /* SMSC9512/9514 USB Hub & Ethernet Device (SAL10) */
1975                 USB_DEVICE(0x0424, 0x9904),
1976                 .driver_info = (unsigned long) &smsc95xx_info,
1977         },
1978         {
1979                 /* SMSC9500A USB Ethernet Device (HAL) */
1980                 USB_DEVICE(0x0424, 0x9905),
1981                 .driver_info = (unsigned long) &smsc95xx_info,
1982         },
1983         {
1984                 /* SMSC9505A USB Ethernet Device (HAL) */
1985                 USB_DEVICE(0x0424, 0x9906),
1986                 .driver_info = (unsigned long) &smsc95xx_info,
1987         },
1988         {
1989                 /* SMSC9500 USB Ethernet Device (Alternate ID) */
1990                 USB_DEVICE(0x0424, 0x9907),
1991                 .driver_info = (unsigned long) &smsc95xx_info,
1992         },
1993         {
1994                 /* SMSC9500A USB Ethernet Device (Alternate ID) */
1995                 USB_DEVICE(0x0424, 0x9908),
1996                 .driver_info = (unsigned long) &smsc95xx_info,
1997         },
1998         {
1999                 /* SMSC9512/9514 USB Hub & Ethernet Device (Alternate ID) */
2000                 USB_DEVICE(0x0424, 0x9909),
2001                 .driver_info = (unsigned long) &smsc95xx_info,
2002         },
2003         {
2004                 /* SMSC LAN9530 USB Ethernet Device */
2005                 USB_DEVICE(0x0424, 0x9530),
2006                 .driver_info = (unsigned long) &smsc95xx_info,
2007         },
2008         {
2009                 /* SMSC LAN9730 USB Ethernet Device */
2010                 USB_DEVICE(0x0424, 0x9730),
2011                 .driver_info = (unsigned long) &smsc95xx_info,
2012         },
2013         {
2014                 /* SMSC LAN89530 USB Ethernet Device */
2015                 USB_DEVICE(0x0424, 0x9E08),
2016                 .driver_info = (unsigned long) &smsc95xx_info,
2017         },
2018         { },            /* END */
2019 };
2020 MODULE_DEVICE_TABLE(usb, products);
2021
2022 static struct usb_driver smsc95xx_driver = {
2023         .name           = "smsc95xx",
2024         .id_table       = products,
2025         .probe          = usbnet_probe,
2026         .suspend        = smsc95xx_suspend,
2027         .resume         = smsc95xx_resume,
2028         .reset_resume   = smsc95xx_reset_resume,
2029         .disconnect     = usbnet_disconnect,
2030         .disable_hub_initiated_lpm = 1,
2031         .supports_autosuspend = 1,
2032 };
2033
2034 module_usb_driver(smsc95xx_driver);
2035
2036 MODULE_AUTHOR("Nancy Lin");
2037 MODULE_AUTHOR("Steve Glendinning <steve.glendinning@shawell.net>");
2038 MODULE_DESCRIPTION("SMSC95XX USB 2.0 Ethernet Devices");
2039 MODULE_LICENSE("GPL");