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, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  18  *
  19  *****************************************************************************/
  20
  21 #include <linux/module.h>
  22 #include <linux/kmod.h>
  23 #include <linux/init.h>
  24 #include <linux/netdevice.h>
  25 #include <linux/etherdevice.h>
  26 #include <linux/ethtool.h>
  27 #include <linux/mii.h>
  28 #include <linux/usb.h>
  29 #include <linux/bitrev.h>
  30 #include <linux/crc16.h>
  31 #include <linux/crc32.h>
  32 #include <linux/usb/usbnet.h>
  33 #include <linux/slab.h>
  34 #include "smsc95xx.h"
  35
  36 #define SMSC_CHIPNAME                   "smsc95xx"
  37 #define SMSC_DRIVER_VERSION             "1.0.4"
  38 #define HS_USB_PKT_SIZE                 (512)
  39 #define FS_USB_PKT_SIZE                 (64)
  40 #define DEFAULT_HS_BURST_CAP_SIZE       (16 * 1024 + 5 * HS_USB_PKT_SIZE)
  41 #define DEFAULT_FS_BURST_CAP_SIZE       (6 * 1024 + 33 * FS_USB_PKT_SIZE)
  42 #define DEFAULT_BULK_IN_DELAY           (0x00002000)
  43 #define MAX_SINGLE_PACKET_SIZE          (2048)
  44 #define LAN95XX_EEPROM_MAGIC            (0x9500)
  45 #define EEPROM_MAC_OFFSET               (0x01)
  46 #define DEFAULT_TX_CSUM_ENABLE          (true)
  47 #define DEFAULT_RX_CSUM_ENABLE          (true)
  48 #define SMSC95XX_INTERNAL_PHY_ID        (1)
  49 #define SMSC95XX_TX_OVERHEAD            (8)
  50 #define SMSC95XX_TX_OVERHEAD_CSUM       (12)
  51 #define SUPPORTED_WAKE                  (WAKE_PHY | WAKE_UCAST | WAKE_BCAST | \
  52                                          WAKE_MCAST | WAKE_ARP | WAKE_MAGIC)
  53
  54 #define FEATURE_8_WAKEUP_FILTERS        (0x01)
  55 #define FEATURE_PHY_NLP_CROSSOVER       (0x02)
  56 #define FEATURE_REMOTE_WAKEUP           (0x04)
  57
  58 #define SUSPEND_SUSPEND0                (0x01)
  59 #define SUSPEND_SUSPEND1                (0x02)
  60 #define SUSPEND_SUSPEND2                (0x04)
  61 #define SUSPEND_SUSPEND3                (0x08)
  62 #define SUSPEND_ALLMODES                (SUSPEND_SUSPEND0 | SUSPEND_SUSPEND1 | \
  63                                          SUSPEND_SUSPEND2 | SUSPEND_SUSPEND3)
  64
  65 struct smsc95xx_priv {
  66         u32 mac_cr;
  67         u32 hash_hi;
  68         u32 hash_lo;
  69         u32 wolopts;
  70         spinlock_t mac_cr_lock;
  71         u8 features;
  72         u8 suspend_flags;
  73 };
  74
  75 static bool turbo_mode = true;
  76 module_param(turbo_mode, bool, 0644);
  77 MODULE_PARM_DESC(turbo_mode, "Enable multiple frames per Rx transaction");
  78
  79 static int __must_check __smsc95xx_read_reg(struct usbnet *dev, u32 index,
  80                                             u32 *data, int in_pm)
  81 {
  82         u32 buf;
  83         int ret;
  84         int (*fn)(struct usbnet *, u8, u8, u16, u16, void *, u16);
  85
  86         BUG_ON(!dev);
  87
  88         if (!in_pm)
  89                 fn = usbnet_read_cmd;
  90         else
  91                 fn = usbnet_read_cmd_nopm;
  92
  93         ret = fn(dev, USB_VENDOR_REQUEST_READ_REGISTER, USB_DIR_IN
  94                  | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
  95                  0, index, &buf, 4);
  96         if (unlikely(ret < 0))
  97                 netdev_warn(dev->net, "Failed to read reg index 0x%08x: %d\n",
  98                             index, ret);
  99
 100         le32_to_cpus(&buf);
 101         *data = buf;
 102
 103         return ret;
 104 }
 105
 106 static int __must_check __smsc95xx_write_reg(struct usbnet *dev, u32 index,
 107                                              u32 data, int in_pm)
 108 {
 109         u32 buf;
 110         int ret;
 111         int (*fn)(struct usbnet *, u8, u8, u16, u16, const void *, u16);
 112
 113         BUG_ON(!dev);
 114
 115         if (!in_pm)
 116                 fn = usbnet_write_cmd;
 117         else
 118                 fn = usbnet_write_cmd_nopm;
 119
 120         buf = data;
 121         cpu_to_le32s(&buf);
 122
 123         ret = fn(dev, USB_VENDOR_REQUEST_WRITE_REGISTER, USB_DIR_OUT
 124                  | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 125                  0, index, &buf, 4);
 126         if (unlikely(ret < 0))
 127                 netdev_warn(dev->net, "Failed to write reg index 0x%08x: %d\n",
 128                             index, ret);
 129
 130         return ret;
 131 }
 132
 133 static int __must_check smsc95xx_read_reg_nopm(struct usbnet *dev, u32 index,
 134                                                u32 *data)
 135 {
 136         return __smsc95xx_read_reg(dev, index, data, 1);
 137 }
 138
 139 static int __must_check smsc95xx_write_reg_nopm(struct usbnet *dev, u32 index,
 140                                                 u32 data)
 141 {
 142         return __smsc95xx_write_reg(dev, index, data, 1);
 143 }
 144
 145 static int __must_check smsc95xx_read_reg(struct usbnet *dev, u32 index,
 146                                           u32 *data)
 147 {
 148         return __smsc95xx_read_reg(dev, index, data, 0);
 149 }
 150
 151 static int __must_check smsc95xx_write_reg(struct usbnet *dev, u32 index,
 152                                            u32 data)
 153 {
 154         return __smsc95xx_write_reg(dev, index, data, 0);
 155 }
 156
 157 /* Loop until the read is completed with timeout
 158  * called with phy_mutex held */
 159 static int __must_check __smsc95xx_phy_wait_not_busy(struct usbnet *dev,
 160                                                      int in_pm)
 161 {
 162         unsigned long start_time = jiffies;
 163         u32 val;
 164         int ret;
 165
 166         do {
 167                 ret = __smsc95xx_read_reg(dev, MII_ADDR, &val, in_pm);
 168                 if (ret < 0) {
 169                         netdev_warn(dev->net, "Error reading MII_ACCESS\n");
 170                         return ret;
 171                 }
 172
 173                 if (!(val & MII_BUSY_))
 174                         return 0;
 175         } while (!time_after(jiffies, start_time + HZ));
 176
 177         return -EIO;
 178 }
 179
 180 static int __smsc95xx_mdio_read(struct net_device *netdev, int phy_id, int idx,
 181                                 int in_pm)
 182 {
 183         struct usbnet *dev = netdev_priv(netdev);
 184         u32 val, addr;
 185         int ret;
 186
 187         mutex_lock(&dev->phy_mutex);
 188
 189         /* confirm MII not busy */
 190         ret = __smsc95xx_phy_wait_not_busy(dev, in_pm);
 191         if (ret < 0) {
 192                 netdev_warn(dev->net, "MII is busy in smsc95xx_mdio_read\n");
 193                 goto done;
 194         }
 195
 196         /* set the address, index & direction (read from PHY) */
 197         phy_id &= dev->mii.phy_id_mask;
 198         idx &= dev->mii.reg_num_mask;
 199         addr = (phy_id << 11) | (idx << 6) | MII_READ_ | MII_BUSY_;
 200         ret = __smsc95xx_write_reg(dev, MII_ADDR, addr, in_pm);
 201         if (ret < 0) {
 202                 netdev_warn(dev->net, "Error writing MII_ADDR\n");
 203                 goto done;
 204         }
 205
 206         ret = __smsc95xx_phy_wait_not_busy(dev, in_pm);
 207         if (ret < 0) {
 208                 netdev_warn(dev->net, "Timed out reading MII reg %02X\n", idx);
 209                 goto done;
 210         }
 211
 212         ret = __smsc95xx_read_reg(dev, MII_DATA, &val, in_pm);
 213         if (ret < 0) {
 214                 netdev_warn(dev->net, "Error reading MII_DATA\n");
 215                 goto done;
 216         }
 217
 218         ret = (u16)(val & 0xFFFF);
 219
 220 done:
 221         mutex_unlock(&dev->phy_mutex);
 222         return ret;
 223 }
 224
 225 static void __smsc95xx_mdio_write(struct net_device *netdev, int phy_id,
 226                                   int idx, int regval, int in_pm)
 227 {
 228         struct usbnet *dev = netdev_priv(netdev);
 229         u32 val, addr;
 230         int ret;
 231
 232         mutex_lock(&dev->phy_mutex);
 233
 234         /* confirm MII not busy */
 235         ret = __smsc95xx_phy_wait_not_busy(dev, in_pm);
 236         if (ret < 0) {
 237                 netdev_warn(dev->net, "MII is busy in smsc95xx_mdio_write\n");
 238                 goto done;
 239         }
 240
 241         val = regval;
 242         ret = __smsc95xx_write_reg(dev, MII_DATA, val, in_pm);
 243         if (ret < 0) {
 244                 netdev_warn(dev->net, "Error writing MII_DATA\n");
 245                 goto done;
 246         }
 247
 248         /* set the address, index & direction (write to PHY) */
 249         phy_id &= dev->mii.phy_id_mask;
 250         idx &= dev->mii.reg_num_mask;
 251         addr = (phy_id << 11) | (idx << 6) | MII_WRITE_ | MII_BUSY_;
 252         ret = __smsc95xx_write_reg(dev, MII_ADDR, addr, in_pm);
 253         if (ret < 0) {
 254                 netdev_warn(dev->net, "Error writing MII_ADDR\n");
 255                 goto done;
 256         }
 257
 258         ret = __smsc95xx_phy_wait_not_busy(dev, in_pm);
 259         if (ret < 0) {
 260                 netdev_warn(dev->net, "Timed out writing MII reg %02X\n", idx);
 261                 goto done;
 262         }
 263
 264 done:
 265         mutex_unlock(&dev->phy_mutex);
 266 }
 267
 268 static int smsc95xx_mdio_read_nopm(struct net_device *netdev, int phy_id,
 269                                    int idx)
 270 {
 271         return __smsc95xx_mdio_read(netdev, phy_id, idx, 1);
 272 }
 273
 274 static void smsc95xx_mdio_write_nopm(struct net_device *netdev, int phy_id,
 275                                      int idx, int regval)
 276 {
 277         __smsc95xx_mdio_write(netdev, phy_id, idx, regval, 1);
 278 }
 279
 280 static int smsc95xx_mdio_read(struct net_device *netdev, int phy_id, int idx)
 281 {
 282         return __smsc95xx_mdio_read(netdev, phy_id, idx, 0);
 283 }
 284
 285 static void smsc95xx_mdio_write(struct net_device *netdev, int phy_id, int idx,
 286                                 int regval)
 287 {
 288         __smsc95xx_mdio_write(netdev, phy_id, idx, regval, 0);
 289 }
 290
 291 static int __must_check smsc95xx_wait_eeprom(struct usbnet *dev)
 292 {
 293         unsigned long start_time = jiffies;
 294         u32 val;
 295         int ret;
 296
 297         do {
 298                 ret = smsc95xx_read_reg(dev, E2P_CMD, &val);
 299                 if (ret < 0) {
 300                         netdev_warn(dev->net, "Error reading E2P_CMD\n");
 301                         return ret;
 302                 }
 303
 304                 if (!(val & E2P_CMD_BUSY_) || (val & E2P_CMD_TIMEOUT_))
 305                         break;
 306                 udelay(40);
 307         } while (!time_after(jiffies, start_time + HZ));
 308
 309         if (val & (E2P_CMD_TIMEOUT_ | E2P_CMD_BUSY_)) {
 310                 netdev_warn(dev->net, "EEPROM read operation timeout\n");
 311                 return -EIO;
 312         }
 313
 314         return 0;
 315 }
 316
 317 static int __must_check smsc95xx_eeprom_confirm_not_busy(struct usbnet *dev)
 318 {
 319         unsigned long start_time = jiffies;
 320         u32 val;
 321         int ret;
 322
 323         do {
 324                 ret = smsc95xx_read_reg(dev, E2P_CMD, &val);
 325                 if (ret < 0) {
 326                         netdev_warn(dev->net, "Error reading E2P_CMD\n");
 327                         return ret;
 328                 }
 329
 330                 if (!(val & E2P_CMD_BUSY_))
 331                         return 0;
 332
 333                 udelay(40);
 334         } while (!time_after(jiffies, start_time + HZ));
 335
 336         netdev_warn(dev->net, "EEPROM is busy\n");
 337         return -EIO;
 338 }
 339
 340 static int smsc95xx_read_eeprom(struct usbnet *dev, u32 offset, u32 length,
 341                                 u8 *data)
 342 {
 343         u32 val;
 344         int i, ret;
 345
 346         BUG_ON(!dev);
 347         BUG_ON(!data);
 348
 349         ret = smsc95xx_eeprom_confirm_not_busy(dev);
 350         if (ret)
 351                 return ret;
 352
 353         for (i = 0; i < length; i++) {
 354                 val = E2P_CMD_BUSY_ | E2P_CMD_READ_ | (offset & E2P_CMD_ADDR_);
 355                 ret = smsc95xx_write_reg(dev, E2P_CMD, val);
 356                 if (ret < 0) {
 357                         netdev_warn(dev->net, "Error writing E2P_CMD\n");
 358                         return ret;
 359                 }
 360
 361                 ret = smsc95xx_wait_eeprom(dev);
 362                 if (ret < 0)
 363                         return ret;
 364
 365                 ret = smsc95xx_read_reg(dev, E2P_DATA, &val);
 366                 if (ret < 0) {
 367                         netdev_warn(dev->net, "Error reading E2P_DATA\n");
 368                         return ret;
 369                 }
 370
 371                 data[i] = val & 0xFF;
 372                 offset++;
 373         }
 374
 375         return 0;
 376 }
 377
 378 static int smsc95xx_write_eeprom(struct usbnet *dev, u32 offset, u32 length,
 379                                  u8 *data)
 380 {
 381         u32 val;
 382         int i, ret;
 383
 384         BUG_ON(!dev);
 385         BUG_ON(!data);
 386
 387         ret = smsc95xx_eeprom_confirm_not_busy(dev);
 388         if (ret)
 389                 return ret;
 390
 391         /* Issue write/erase enable command */
 392         val = E2P_CMD_BUSY_ | E2P_CMD_EWEN_;
 393         ret = smsc95xx_write_reg(dev, E2P_CMD, val);
 394         if (ret < 0) {
 395                 netdev_warn(dev->net, "Error writing E2P_DATA\n");
 396                 return ret;
 397         }
 398
 399         ret = smsc95xx_wait_eeprom(dev);
 400         if (ret < 0)
 401                 return ret;
 402
 403         for (i = 0; i < length; i++) {
 404
 405                 /* Fill data register */
 406                 val = data[i];
 407                 ret = smsc95xx_write_reg(dev, E2P_DATA, val);
 408                 if (ret < 0) {
 409                         netdev_warn(dev->net, "Error writing E2P_DATA\n");
 410                         return ret;
 411                 }
 412
 413                 /* Send "write" command */
 414                 val = E2P_CMD_BUSY_ | E2P_CMD_WRITE_ | (offset & E2P_CMD_ADDR_);
 415                 ret = smsc95xx_write_reg(dev, E2P_CMD, val);
 416                 if (ret < 0) {
 417                         netdev_warn(dev->net, "Error writing E2P_CMD\n");
 418                         return ret;
 419                 }
 420
 421                 ret = smsc95xx_wait_eeprom(dev);
 422                 if (ret < 0)
 423                         return ret;
 424
 425                 offset++;
 426         }
 427
 428         return 0;
 429 }
 430
 431 static int __must_check smsc95xx_write_reg_async(struct usbnet *dev, u16 index,
 432                                                  u32 data)
 433 {
 434         const u16 size = 4;
 435         u32 buf;
 436         int ret;
 437
 438         buf = data;
 439         cpu_to_le32s(&buf);
 440
 441         ret = usbnet_write_cmd_async(dev, USB_VENDOR_REQUEST_WRITE_REGISTER,
 442                                      USB_DIR_OUT | USB_TYPE_VENDOR |
 443                                      USB_RECIP_DEVICE,
 444                                      0, index, &buf, size);
 445         if (ret < 0)
 446                 netdev_warn(dev->net, "Error write async cmd, sts=%d\n",
 447                             ret);
 448         return ret;
 449 }
 450
 451 /* returns hash bit number for given MAC address
 452  * example:
 453  * 01 00 5E 00 00 01 -> returns bit number 31 */
 454 static unsigned int smsc95xx_hash(char addr[ETH_ALEN])
 455 {
 456         return (ether_crc(ETH_ALEN, addr) >> 26) & 0x3f;
 457 }
 458
 459 static void smsc95xx_set_multicast(struct net_device *netdev)
 460 {
 461         struct usbnet *dev = netdev_priv(netdev);
 462         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
 463         unsigned long flags;
 464         int ret;
 465
 466         pdata->hash_hi = 0;
 467         pdata->hash_lo = 0;
 468
 469         spin_lock_irqsave(&pdata->mac_cr_lock, flags);
 470
 471         if (dev->net->flags & IFF_PROMISC) {
 472                 netif_dbg(dev, drv, dev->net, "promiscuous mode enabled\n");
 473                 pdata->mac_cr |= MAC_CR_PRMS_;
 474                 pdata->mac_cr &= ~(MAC_CR_MCPAS_ | MAC_CR_HPFILT_);
 475         } else if (dev->net->flags & IFF_ALLMULTI) {
 476                 netif_dbg(dev, drv, dev->net, "receive all multicast enabled\n");
 477                 pdata->mac_cr |= MAC_CR_MCPAS_;
 478                 pdata->mac_cr &= ~(MAC_CR_PRMS_ | MAC_CR_HPFILT_);
 479         } else if (!netdev_mc_empty(dev->net)) {
 480                 struct netdev_hw_addr *ha;
 481
 482                 pdata->mac_cr |= MAC_CR_HPFILT_;
 483                 pdata->mac_cr &= ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_);
 484
 485                 netdev_for_each_mc_addr(ha, netdev) {
 486                         u32 bitnum = smsc95xx_hash(ha->addr);
 487                         u32 mask = 0x01 << (bitnum & 0x1F);
 488                         if (bitnum & 0x20)
 489                                 pdata->hash_hi |= mask;
 490                         else
 491                                 pdata->hash_lo |= mask;
 492                 }
 493
 494                 netif_dbg(dev, drv, dev->net, "HASHH=0x%08X, HASHL=0x%08X\n",
 495                                    pdata->hash_hi, pdata->hash_lo);
 496         } else {
 497                 netif_dbg(dev, drv, dev->net, "receive own packets only\n");
 498                 pdata->mac_cr &=
 499                         ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_ | MAC_CR_HPFILT_);
 500         }
 501
 502         spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
 503
 504         /* Initiate async writes, as we can't wait for completion here */
 505         ret = smsc95xx_write_reg_async(dev, HASHH, pdata->hash_hi);
 506         if (ret < 0)
 507                 netdev_warn(dev->net, "failed to initiate async write to HASHH\n");
 508
 509         ret = smsc95xx_write_reg_async(dev, HASHL, pdata->hash_lo);
 510         if (ret < 0)
 511                 netdev_warn(dev->net, "failed to initiate async write to HASHL\n");
 512
 513         ret = smsc95xx_write_reg_async(dev, MAC_CR, pdata->mac_cr);
 514         if (ret < 0)
 515                 netdev_warn(dev->net, "failed to initiate async write to MAC_CR\n");
 516 }
 517
 518 static int smsc95xx_phy_update_flowcontrol(struct usbnet *dev, u8 duplex,
 519                                            u16 lcladv, u16 rmtadv)
 520 {
 521         u32 flow, afc_cfg = 0;
 522
 523         int ret = smsc95xx_read_reg(dev, AFC_CFG, &afc_cfg);
 524         if (ret < 0)
 525                 return ret;
 526
 527         if (duplex == DUPLEX_FULL) {
 528                 u8 cap = mii_resolve_flowctrl_fdx(lcladv, rmtadv);
 529
 530                 if (cap & FLOW_CTRL_RX)
 531                         flow = 0xFFFF0002;
 532                 else
 533                         flow = 0;
 534
 535                 if (cap & FLOW_CTRL_TX)
 536                         afc_cfg |= 0xF;
 537                 else
 538                         afc_cfg &= ~0xF;
 539
 540                 netif_dbg(dev, link, dev->net, "rx pause %s, tx pause %s\n",
 541                                    cap & FLOW_CTRL_RX ? "enabled" : "disabled",
 542                                    cap & FLOW_CTRL_TX ? "enabled" : "disabled");
 543         } else {
 544                 netif_dbg(dev, link, dev->net, "half duplex\n");
 545                 flow = 0;
 546                 afc_cfg |= 0xF;
 547         }
 548
 549         ret = smsc95xx_write_reg(dev, FLOW, flow);
 550         if (ret < 0)
 551                 return ret;
 552
 553         return smsc95xx_write_reg(dev, AFC_CFG, afc_cfg);
 554 }
 555
 556 static int smsc95xx_link_reset(struct usbnet *dev)
 557 {
 558         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
 559         struct mii_if_info *mii = &dev->mii;
 560         struct ethtool_cmd ecmd = { .cmd = ETHTOOL_GSET };
 561         unsigned long flags;
 562         u16 lcladv, rmtadv;
 563         int ret;
 564
 565         /* clear interrupt status */
 566         ret = smsc95xx_mdio_read(dev->net, mii->phy_id, PHY_INT_SRC);
 567         if (ret < 0)
 568                 return ret;
 569
 570         ret = smsc95xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL_);
 571         if (ret < 0)
 572                 return ret;
 573
 574         mii_check_media(mii, 1, 1);
 575         mii_ethtool_gset(&dev->mii, &ecmd);
 576         lcladv = smsc95xx_mdio_read(dev->net, mii->phy_id, MII_ADVERTISE);
 577         rmtadv = smsc95xx_mdio_read(dev->net, mii->phy_id, MII_LPA);
 578
 579         netif_dbg(dev, link, dev->net,
 580                   "speed: %u duplex: %d lcladv: %04x rmtadv: %04x\n",
 581                   ethtool_cmd_speed(&ecmd), ecmd.duplex, lcladv, rmtadv);
 582
 583         spin_lock_irqsave(&pdata->mac_cr_lock, flags);
 584         if (ecmd.duplex != DUPLEX_FULL) {
 585                 pdata->mac_cr &= ~MAC_CR_FDPX_;
 586                 pdata->mac_cr |= MAC_CR_RCVOWN_;
 587         } else {
 588                 pdata->mac_cr &= ~MAC_CR_RCVOWN_;
 589                 pdata->mac_cr |= MAC_CR_FDPX_;
 590         }
 591         spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
 592
 593         ret = smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr);
 594         if (ret < 0)
 595                 return ret;
 596
 597         ret = smsc95xx_phy_update_flowcontrol(dev, ecmd.duplex, lcladv, rmtadv);
 598         if (ret < 0)
 599                 netdev_warn(dev->net, "Error updating PHY flow control\n");
 600
 601         return ret;
 602 }
 603
 604 static void smsc95xx_status(struct usbnet *dev, struct urb *urb)
 605 {
 606         u32 intdata;
 607
 608         if (urb->actual_length != 4) {
 609                 netdev_warn(dev->net, "unexpected urb length %d\n",
 610                             urb->actual_length);
 611                 return;
 612         }
 613
 614         memcpy(&intdata, urb->transfer_buffer, 4);
 615         le32_to_cpus(&intdata);
 616
 617         netif_dbg(dev, link, dev->net, "intdata: 0x%08X\n", intdata);
 618
 619         if (intdata & INT_ENP_PHY_INT_)
 620                 usbnet_defer_kevent(dev, EVENT_LINK_RESET);
 621         else
 622                 netdev_warn(dev->net, "unexpected interrupt, intdata=0x%08X\n",
 623                             intdata);
 624 }
 625
 626 /* Enable or disable Tx & Rx checksum offload engines */
 627 static int smsc95xx_set_features(struct net_device *netdev,
 628         netdev_features_t features)
 629 {
 630         struct usbnet *dev = netdev_priv(netdev);
 631         u32 read_buf;
 632         int ret;
 633
 634         ret = smsc95xx_read_reg(dev, COE_CR, &read_buf);
 635         if (ret < 0)
 636                 return ret;
 637
 638         if (features & NETIF_F_HW_CSUM)
 639                 read_buf |= Tx_COE_EN_;
 640         else
 641                 read_buf &= ~Tx_COE_EN_;
 642
 643         if (features & NETIF_F_RXCSUM)
 644                 read_buf |= Rx_COE_EN_;
 645         else
 646                 read_buf &= ~Rx_COE_EN_;
 647
 648         ret = smsc95xx_write_reg(dev, COE_CR, read_buf);
 649         if (ret < 0)
 650                 return ret;
 651
 652         netif_dbg(dev, hw, dev->net, "COE_CR = 0x%08x\n", read_buf);
 653         return 0;
 654 }
 655
 656 static int smsc95xx_ethtool_get_eeprom_len(struct net_device *net)
 657 {
 658         return MAX_EEPROM_SIZE;
 659 }
 660
 661 static int smsc95xx_ethtool_get_eeprom(struct net_device *netdev,
 662                                        struct ethtool_eeprom *ee, u8 *data)
 663 {
 664         struct usbnet *dev = netdev_priv(netdev);
 665
 666         ee->magic = LAN95XX_EEPROM_MAGIC;
 667
 668         return smsc95xx_read_eeprom(dev, ee->offset, ee->len, data);
 669 }
 670
 671 static int smsc95xx_ethtool_set_eeprom(struct net_device *netdev,
 672                                        struct ethtool_eeprom *ee, u8 *data)
 673 {
 674         struct usbnet *dev = netdev_priv(netdev);
 675
 676         if (ee->magic != LAN95XX_EEPROM_MAGIC) {
 677                 netdev_warn(dev->net, "EEPROM: magic value mismatch, magic = 0x%x\n",
 678                             ee->magic);
 679                 return -EINVAL;
 680         }
 681
 682         return smsc95xx_write_eeprom(dev, ee->offset, ee->len, data);
 683 }
 684
 685 static int smsc95xx_ethtool_getregslen(struct net_device *netdev)
 686 {
 687         /* all smsc95xx registers */
 688         return COE_CR - ID_REV + sizeof(u32);
 689 }
 690
 691 static void
 692 smsc95xx_ethtool_getregs(struct net_device *netdev, struct ethtool_regs *regs,
 693                          void *buf)
 694 {
 695         struct usbnet *dev = netdev_priv(netdev);
 696         unsigned int i, j;
 697         int retval;
 698         u32 *data = buf;
 699
 700         retval = smsc95xx_read_reg(dev, ID_REV, &regs->version);
 701         if (retval < 0) {
 702                 netdev_warn(netdev, "REGS: cannot read ID_REV\n");
 703                 return;
 704         }
 705
 706         for (i = ID_REV, j = 0; i <= COE_CR; i += (sizeof(u32)), j++) {
 707                 retval = smsc95xx_read_reg(dev, i, &data[j]);
 708                 if (retval < 0) {
 709                         netdev_warn(netdev, "REGS: cannot read reg[%x]\n", i);
 710                         return;
 711                 }
 712         }
 713 }
 714
 715 static void smsc95xx_ethtool_get_wol(struct net_device *net,
 716                                      struct ethtool_wolinfo *wolinfo)
 717 {
 718         struct usbnet *dev = netdev_priv(net);
 719         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
 720
 721         wolinfo->supported = SUPPORTED_WAKE;
 722         wolinfo->wolopts = pdata->wolopts;
 723 }
 724
 725 static int smsc95xx_ethtool_set_wol(struct net_device *net,
 726                                     struct ethtool_wolinfo *wolinfo)
 727 {
 728         struct usbnet *dev = netdev_priv(net);
 729         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
 730         int ret;
 731
 732         pdata->wolopts = wolinfo->wolopts & SUPPORTED_WAKE;
 733
 734         ret = device_set_wakeup_enable(&dev->udev->dev, pdata->wolopts);
 735         if (ret < 0)
 736                 netdev_warn(dev->net, "device_set_wakeup_enable error %d\n", ret);
 737
 738         return ret;
 739 }
 740
 741 static const struct ethtool_ops smsc95xx_ethtool_ops = {
 742         .get_link       = usbnet_get_link,
 743         .nway_reset     = usbnet_nway_reset,
 744         .get_drvinfo    = usbnet_get_drvinfo,
 745         .get_msglevel   = usbnet_get_msglevel,
 746         .set_msglevel   = usbnet_set_msglevel,
 747         .get_settings   = usbnet_get_settings,
 748         .set_settings   = usbnet_set_settings,
 749         .get_eeprom_len = smsc95xx_ethtool_get_eeprom_len,
 750         .get_eeprom     = smsc95xx_ethtool_get_eeprom,
 751         .set_eeprom     = smsc95xx_ethtool_set_eeprom,
 752         .get_regs_len   = smsc95xx_ethtool_getregslen,
 753         .get_regs       = smsc95xx_ethtool_getregs,
 754         .get_wol        = smsc95xx_ethtool_get_wol,
 755         .set_wol        = smsc95xx_ethtool_set_wol,
 756 };
 757
 758 static int smsc95xx_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
 759 {
 760         struct usbnet *dev = netdev_priv(netdev);
 761
 762         if (!netif_running(netdev))
 763                 return -EINVAL;
 764
 765         return generic_mii_ioctl(&dev->mii, if_mii(rq), cmd, NULL);
 766 }
 767
 768 static void smsc95xx_init_mac_address(struct usbnet *dev)
 769 {
 770         /* try reading mac address from EEPROM */
 771         if (smsc95xx_read_eeprom(dev, EEPROM_MAC_OFFSET, ETH_ALEN,
 772                         dev->net->dev_addr) == 0) {
 773                 if (is_valid_ether_addr(dev->net->dev_addr)) {
 774                         /* eeprom values are valid so use them */
 775                         netif_dbg(dev, ifup, dev->net, "MAC address read from EEPROM\n");
 776                         return;
 777                 }
 778         }
 779
 780         /* no eeprom, or eeprom values are invalid. generate random MAC */
 781         eth_hw_addr_random(dev->net);
 782         netif_dbg(dev, ifup, dev->net, "MAC address set to eth_random_addr\n");
 783 }
 784
 785 static int smsc95xx_set_mac_address(struct usbnet *dev)
 786 {
 787         u32 addr_lo = dev->net->dev_addr[0] | dev->net->dev_addr[1] << 8 |
 788                 dev->net->dev_addr[2] << 16 | dev->net->dev_addr[3] << 24;
 789         u32 addr_hi = dev->net->dev_addr[4] | dev->net->dev_addr[5] << 8;
 790         int ret;
 791
 792         ret = smsc95xx_write_reg(dev, ADDRL, addr_lo);
 793         if (ret < 0)
 794                 return ret;
 795
 796         return smsc95xx_write_reg(dev, ADDRH, addr_hi);
 797 }
 798
 799 /* starts the TX path */
 800 static int smsc95xx_start_tx_path(struct usbnet *dev)
 801 {
 802         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
 803         unsigned long flags;
 804         int ret;
 805
 806         /* Enable Tx at MAC */
 807         spin_lock_irqsave(&pdata->mac_cr_lock, flags);
 808         pdata->mac_cr |= MAC_CR_TXEN_;
 809         spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
 810
 811         ret = smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr);
 812         if (ret < 0)
 813                 return ret;
 814
 815         /* Enable Tx at SCSRs */
 816         return smsc95xx_write_reg(dev, TX_CFG, TX_CFG_ON_);
 817 }
 818
 819 /* Starts the Receive path */
 820 static int smsc95xx_start_rx_path(struct usbnet *dev, int in_pm)
 821 {
 822         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
 823         unsigned long flags;
 824
 825         spin_lock_irqsave(&pdata->mac_cr_lock, flags);
 826         pdata->mac_cr |= MAC_CR_RXEN_;
 827         spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
 828
 829         return __smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr, in_pm);
 830 }
 831
 832 static int smsc95xx_phy_initialize(struct usbnet *dev)
 833 {
 834         int bmcr, ret, timeout = 0;
 835
 836         /* Initialize MII structure */
 837         dev->mii.dev = dev->net;
 838         dev->mii.mdio_read = smsc95xx_mdio_read;
 839         dev->mii.mdio_write = smsc95xx_mdio_write;
 840         dev->mii.phy_id_mask = 0x1f;
 841         dev->mii.reg_num_mask = 0x1f;
 842         dev->mii.phy_id = SMSC95XX_INTERNAL_PHY_ID;
 843
 844         /* reset phy and wait for reset to complete */
 845         smsc95xx_mdio_write(dev->net, dev->mii.phy_id, MII_BMCR, BMCR_RESET);
 846
 847         do {
 848                 msleep(10);
 849                 bmcr = smsc95xx_mdio_read(dev->net, dev->mii.phy_id, MII_BMCR);
 850                 timeout++;
 851         } while ((bmcr & BMCR_RESET) && (timeout < 100));
 852
 853         if (timeout >= 100) {
 854                 netdev_warn(dev->net, "timeout on PHY Reset");
 855                 return -EIO;
 856         }
 857
 858         smsc95xx_mdio_write(dev->net, dev->mii.phy_id, MII_ADVERTISE,
 859                 ADVERTISE_ALL | ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP |
 860                 ADVERTISE_PAUSE_ASYM);
 861
 862         /* read to clear */
 863         ret = smsc95xx_mdio_read(dev->net, dev->mii.phy_id, PHY_INT_SRC);
 864         if (ret < 0) {
 865                 netdev_warn(dev->net, "Failed to read PHY_INT_SRC during init\n");
 866                 return ret;
 867         }
 868
 869         smsc95xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_MASK,
 870                 PHY_INT_MASK_DEFAULT_);
 871         mii_nway_restart(&dev->mii);
 872
 873         netif_dbg(dev, ifup, dev->net, "phy initialised successfully\n");
 874         return 0;
 875 }
 876
 877 static int smsc95xx_reset(struct usbnet *dev)
 878 {
 879         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
 880         u32 read_buf, write_buf, burst_cap;
 881         int ret = 0, timeout;
 882
 883         netif_dbg(dev, ifup, dev->net, "entering smsc95xx_reset\n");
 884
 885         ret = smsc95xx_write_reg(dev, HW_CFG, HW_CFG_LRST_);
 886         if (ret < 0)
 887                 return ret;
 888
 889         timeout = 0;
 890         do {
 891                 msleep(10);
 892                 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
 893                 if (ret < 0)
 894                         return ret;
 895                 timeout++;
 896         } while ((read_buf & HW_CFG_LRST_) && (timeout < 100));
 897
 898         if (timeout >= 100) {
 899                 netdev_warn(dev->net, "timeout waiting for completion of Lite Reset\n");
 900                 return ret;
 901         }
 902
 903         ret = smsc95xx_write_reg(dev, PM_CTRL, PM_CTL_PHY_RST_);
 904         if (ret < 0)
 905                 return ret;
 906
 907         timeout = 0;
 908         do {
 909                 msleep(10);
 910                 ret = smsc95xx_read_reg(dev, PM_CTRL, &read_buf);
 911                 if (ret < 0)
 912                         return ret;
 913                 timeout++;
 914         } while ((read_buf & PM_CTL_PHY_RST_) && (timeout < 100));
 915
 916         if (timeout >= 100) {
 917                 netdev_warn(dev->net, "timeout waiting for PHY Reset\n");
 918                 return ret;
 919         }
 920
 921         ret = smsc95xx_set_mac_address(dev);
 922         if (ret < 0)
 923                 return ret;
 924
 925         netif_dbg(dev, ifup, dev->net, "MAC Address: %pM\n",
 926                   dev->net->dev_addr);
 927
 928         ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
 929         if (ret < 0)
 930                 return ret;
 931
 932         netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG : 0x%08x\n",
 933                   read_buf);
 934
 935         read_buf |= HW_CFG_BIR_;
 936
 937         ret = smsc95xx_write_reg(dev, HW_CFG, read_buf);
 938         if (ret < 0)
 939                 return ret;
 940
 941         ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
 942         if (ret < 0)
 943                 return ret;
 944
 945         netif_dbg(dev, ifup, dev->net,
 946                   "Read Value from HW_CFG after writing HW_CFG_BIR_: 0x%08x\n",
 947                   read_buf);
 948
 949         if (!turbo_mode) {
 950                 burst_cap = 0;
 951                 dev->rx_urb_size = MAX_SINGLE_PACKET_SIZE;
 952         } else if (dev->udev->speed == USB_SPEED_HIGH) {
 953                 burst_cap = DEFAULT_HS_BURST_CAP_SIZE / HS_USB_PKT_SIZE;
 954                 dev->rx_urb_size = DEFAULT_HS_BURST_CAP_SIZE;
 955         } else {
 956                 burst_cap = DEFAULT_FS_BURST_CAP_SIZE / FS_USB_PKT_SIZE;
 957                 dev->rx_urb_size = DEFAULT_FS_BURST_CAP_SIZE;
 958         }
 959
 960         netif_dbg(dev, ifup, dev->net, "rx_urb_size=%ld\n",
 961                   (ulong)dev->rx_urb_size);
 962
 963         ret = smsc95xx_write_reg(dev, BURST_CAP, burst_cap);
 964         if (ret < 0)
 965                 return ret;
 966
 967         ret = smsc95xx_read_reg(dev, BURST_CAP, &read_buf);
 968         if (ret < 0)
 969                 return ret;
 970
 971         netif_dbg(dev, ifup, dev->net,
 972                   "Read Value from BURST_CAP after writing: 0x%08x\n",
 973                   read_buf);
 974
 975         ret = smsc95xx_write_reg(dev, BULK_IN_DLY, DEFAULT_BULK_IN_DELAY);
 976         if (ret < 0)
 977                 return ret;
 978
 979         ret = smsc95xx_read_reg(dev, BULK_IN_DLY, &read_buf);
 980         if (ret < 0)
 981                 return ret;
 982
 983         netif_dbg(dev, ifup, dev->net,
 984                   "Read Value from BULK_IN_DLY after writing: 0x%08x\n",
 985                   read_buf);
 986
 987         ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
 988         if (ret < 0)
 989                 return ret;
 990
 991         netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG: 0x%08x\n",
 992                   read_buf);
 993
 994         if (turbo_mode)
 995                 read_buf |= (HW_CFG_MEF_ | HW_CFG_BCE_);
 996
 997         read_buf &= ~HW_CFG_RXDOFF_;
 998
 999         /* set Rx data offset=2, Make IP header aligns on word boundary. */
1000         read_buf |= NET_IP_ALIGN << 9;
1001
1002         ret = smsc95xx_write_reg(dev, HW_CFG, read_buf);
1003         if (ret < 0)
1004                 return ret;
1005
1006         ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
1007         if (ret < 0)
1008                 return ret;
1009
1010         netif_dbg(dev, ifup, dev->net,
1011                   "Read Value from HW_CFG after writing: 0x%08x\n", read_buf);
1012
1013         ret = smsc95xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL_);
1014         if (ret < 0)
1015                 return ret;
1016
1017         ret = smsc95xx_read_reg(dev, ID_REV, &read_buf);
1018         if (ret < 0)
1019                 return ret;
1020         netif_dbg(dev, ifup, dev->net, "ID_REV = 0x%08x\n", read_buf);
1021
1022         /* Configure GPIO pins as LED outputs */
1023         write_buf = LED_GPIO_CFG_SPD_LED | LED_GPIO_CFG_LNK_LED |
1024                 LED_GPIO_CFG_FDX_LED;
1025         ret = smsc95xx_write_reg(dev, LED_GPIO_CFG, write_buf);
1026         if (ret < 0)
1027                 return ret;
1028
1029         /* Init Tx */
1030         ret = smsc95xx_write_reg(dev, FLOW, 0);
1031         if (ret < 0)
1032                 return ret;
1033
1034         ret = smsc95xx_write_reg(dev, AFC_CFG, AFC_CFG_DEFAULT);
1035         if (ret < 0)
1036                 return ret;
1037
1038         /* Don't need mac_cr_lock during initialisation */
1039         ret = smsc95xx_read_reg(dev, MAC_CR, &pdata->mac_cr);
1040         if (ret < 0)
1041                 return ret;
1042
1043         /* Init Rx */
1044         /* Set Vlan */
1045         ret = smsc95xx_write_reg(dev, VLAN1, (u32)ETH_P_8021Q);
1046         if (ret < 0)
1047                 return ret;
1048
1049         /* Enable or disable checksum offload engines */
1050         ret = smsc95xx_set_features(dev->net, dev->net->features);
1051         if (ret < 0) {
1052                 netdev_warn(dev->net, "Failed to set checksum offload features\n");
1053                 return ret;
1054         }
1055
1056         smsc95xx_set_multicast(dev->net);
1057
1058         ret = smsc95xx_phy_initialize(dev);
1059         if (ret < 0) {
1060                 netdev_warn(dev->net, "Failed to init PHY\n");
1061                 return ret;
1062         }
1063
1064         ret = smsc95xx_read_reg(dev, INT_EP_CTL, &read_buf);
1065         if (ret < 0)
1066                 return ret;
1067
1068         /* enable PHY interrupts */
1069         read_buf |= INT_EP_CTL_PHY_INT_;
1070
1071         ret = smsc95xx_write_reg(dev, INT_EP_CTL, read_buf);
1072         if (ret < 0)
1073                 return ret;
1074
1075         ret = smsc95xx_start_tx_path(dev);
1076         if (ret < 0) {
1077                 netdev_warn(dev->net, "Failed to start TX path\n");
1078                 return ret;
1079         }
1080
1081         ret = smsc95xx_start_rx_path(dev, 0);
1082         if (ret < 0) {
1083                 netdev_warn(dev->net, "Failed to start RX path\n");
1084                 return ret;
1085         }
1086
1087         netif_dbg(dev, ifup, dev->net, "smsc95xx_reset, return 0\n");
1088         return 0;
1089 }
1090
1091 static const struct net_device_ops smsc95xx_netdev_ops = {
1092         .ndo_open               = usbnet_open,
1093         .ndo_stop               = usbnet_stop,
1094         .ndo_start_xmit         = usbnet_start_xmit,
1095         .ndo_tx_timeout         = usbnet_tx_timeout,
1096         .ndo_change_mtu         = usbnet_change_mtu,
1097         .ndo_set_mac_address    = eth_mac_addr,
1098         .ndo_validate_addr      = eth_validate_addr,
1099         .ndo_do_ioctl           = smsc95xx_ioctl,
1100         .ndo_set_rx_mode        = smsc95xx_set_multicast,
1101         .ndo_set_features       = smsc95xx_set_features,
1102 };
1103
1104 static int smsc95xx_bind(struct usbnet *dev, struct usb_interface *intf)
1105 {
1106         struct smsc95xx_priv *pdata = NULL;
1107         u32 val;
1108         int ret;
1109
1110         printk(KERN_INFO SMSC_CHIPNAME " v" SMSC_DRIVER_VERSION "\n");
1111
1112         ret = usbnet_get_endpoints(dev, intf);
1113         if (ret < 0) {
1114                 netdev_warn(dev->net, "usbnet_get_endpoints failed: %d\n", ret);
1115                 return ret;
1116         }
1117
1118         dev->data[0] = (unsigned long)kzalloc(sizeof(struct smsc95xx_priv),
1119                                               GFP_KERNEL);
1120
1121         pdata = (struct smsc95xx_priv *)(dev->data[0]);
1122         if (!pdata)
1123                 return -ENOMEM;
1124
1125         spin_lock_init(&pdata->mac_cr_lock);
1126
1127         if (DEFAULT_TX_CSUM_ENABLE)
1128                 dev->net->features |= NETIF_F_HW_CSUM;
1129         if (DEFAULT_RX_CSUM_ENABLE)
1130                 dev->net->features |= NETIF_F_RXCSUM;
1131
1132         dev->net->hw_features = NETIF_F_HW_CSUM | NETIF_F_RXCSUM;
1133
1134         smsc95xx_init_mac_address(dev);
1135
1136         /* Init all registers */
1137         ret = smsc95xx_reset(dev);
1138
1139         /* detect device revision as different features may be available */
1140         ret = smsc95xx_read_reg(dev, ID_REV, &val);
1141         if (ret < 0)
1142                 return ret;
1143         val >>= 16;
1144
1145         if ((val == ID_REV_CHIP_ID_9500A_) || (val == ID_REV_CHIP_ID_9530_) ||
1146             (val == ID_REV_CHIP_ID_89530_) || (val == ID_REV_CHIP_ID_9730_))
1147                 pdata->features = (FEATURE_8_WAKEUP_FILTERS |
1148                         FEATURE_PHY_NLP_CROSSOVER |
1149                         FEATURE_REMOTE_WAKEUP);
1150         else if (val == ID_REV_CHIP_ID_9512_)
1151                 pdata->features = FEATURE_8_WAKEUP_FILTERS;
1152
1153         dev->net->netdev_ops = &smsc95xx_netdev_ops;
1154         dev->net->ethtool_ops = &smsc95xx_ethtool_ops;
1155         dev->net->flags |= IFF_MULTICAST;
1156         dev->net->hard_header_len += SMSC95XX_TX_OVERHEAD_CSUM;
1157         dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len;
1158         return 0;
1159 }
1160
1161 static void smsc95xx_unbind(struct usbnet *dev, struct usb_interface *intf)
1162 {
1163         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1164         if (pdata) {
1165                 netif_dbg(dev, ifdown, dev->net, "free pdata\n");
1166                 kfree(pdata);
1167                 pdata = NULL;
1168                 dev->data[0] = 0;
1169         }
1170 }
1171
1172 static u32 smsc_crc(const u8 *buffer, size_t len, int filter)
1173 {
1174         u32 crc = bitrev16(crc16(0xFFFF, buffer, len));
1175         return crc << ((filter % 2) * 16);
1176 }
1177
1178 static int smsc95xx_enable_phy_wakeup_interrupts(struct usbnet *dev, u16 mask)
1179 {
1180         struct mii_if_info *mii = &dev->mii;
1181         int ret;
1182
1183         netdev_dbg(dev->net, "enabling PHY wakeup interrupts\n");
1184
1185         /* read to clear */
1186         ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_SRC);
1187         if (ret < 0)
1188                 return ret;
1189
1190         /* enable interrupt source */
1191         ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_MASK);
1192         if (ret < 0)
1193                 return ret;
1194
1195         ret |= mask;
1196
1197         smsc95xx_mdio_write_nopm(dev->net, mii->phy_id, PHY_INT_MASK, ret);
1198
1199         return 0;
1200 }
1201
1202 static int smsc95xx_link_ok_nopm(struct usbnet *dev)
1203 {
1204         struct mii_if_info *mii = &dev->mii;
1205         int ret;
1206
1207         /* first, a dummy read, needed to latch some MII phys */
1208         ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR);
1209         if (ret < 0)
1210                 return ret;
1211
1212         ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR);
1213         if (ret < 0)
1214                 return ret;
1215
1216         return !!(ret & BMSR_LSTATUS);
1217 }
1218
1219 static int smsc95xx_enter_suspend0(struct usbnet *dev)
1220 {
1221         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1222         u32 val;
1223         int ret;
1224
1225         ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1226         if (ret < 0)
1227                 return ret;
1228
1229         val &= (~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_));
1230         val |= PM_CTL_SUS_MODE_0;
1231
1232         ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1233         if (ret < 0)
1234                 return ret;
1235
1236         /* clear wol status */
1237         val &= ~PM_CTL_WUPS_;
1238         val |= PM_CTL_WUPS_WOL_;
1239
1240         /* enable energy detection */
1241         if (pdata->wolopts & WAKE_PHY)
1242                 val |= PM_CTL_WUPS_ED_;
1243
1244         ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1245         if (ret < 0)
1246                 return ret;
1247
1248         /* read back PM_CTRL */
1249         ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1250         if (ret < 0)
1251                 return ret;
1252
1253         pdata->suspend_flags |= SUSPEND_SUSPEND0;
1254
1255         return 0;
1256 }
1257
1258 static int smsc95xx_enter_suspend1(struct usbnet *dev)
1259 {
1260         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1261         struct mii_if_info *mii = &dev->mii;
1262         u32 val;
1263         int ret;
1264
1265         /* reconfigure link pulse detection timing for
1266          * compatibility with non-standard link partners
1267          */
1268         if (pdata->features & FEATURE_PHY_NLP_CROSSOVER)
1269                 smsc95xx_mdio_write_nopm(dev->net, mii->phy_id, PHY_EDPD_CONFIG,
1270                         PHY_EDPD_CONFIG_DEFAULT);
1271
1272         /* enable energy detect power-down mode */
1273         ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_MODE_CTRL_STS);
1274         if (ret < 0)
1275                 return ret;
1276
1277         ret |= MODE_CTRL_STS_EDPWRDOWN_;
1278
1279         smsc95xx_mdio_write_nopm(dev->net, mii->phy_id, PHY_MODE_CTRL_STS, ret);
1280
1281         /* enter SUSPEND1 mode */
1282         ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1283         if (ret < 0)
1284                 return ret;
1285
1286         val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_);
1287         val |= PM_CTL_SUS_MODE_1;
1288
1289         ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1290         if (ret < 0)
1291                 return ret;
1292
1293         /* clear wol status, enable energy detection */
1294         val &= ~PM_CTL_WUPS_;
1295         val |= (PM_CTL_WUPS_ED_ | PM_CTL_ED_EN_);
1296
1297         ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1298         if (ret < 0)
1299                 return ret;
1300
1301         pdata->suspend_flags |= SUSPEND_SUSPEND1;
1302
1303         return 0;
1304 }
1305
1306 static int smsc95xx_enter_suspend2(struct usbnet *dev)
1307 {
1308         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1309         u32 val;
1310         int ret;
1311
1312         ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1313         if (ret < 0)
1314                 return ret;
1315
1316         val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_);
1317         val |= PM_CTL_SUS_MODE_2;
1318
1319         ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1320         if (ret < 0)
1321                 return ret;
1322
1323         pdata->suspend_flags |= SUSPEND_SUSPEND2;
1324
1325         return 0;
1326 }
1327
1328 static int smsc95xx_enter_suspend3(struct usbnet *dev)
1329 {
1330         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1331         u32 val;
1332         int ret;
1333
1334         ret = smsc95xx_read_reg_nopm(dev, RX_FIFO_INF, &val);
1335         if (ret < 0)
1336                 return ret;
1337
1338         if (val & 0xFFFF) {
1339                 netdev_info(dev->net, "rx fifo not empty in autosuspend\n");
1340                 return -EBUSY;
1341         }
1342
1343         ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1344         if (ret < 0)
1345                 return ret;
1346
1347         val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_);
1348         val |= PM_CTL_SUS_MODE_3 | PM_CTL_RES_CLR_WKP_STS;
1349
1350         ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1351         if (ret < 0)
1352                 return ret;
1353
1354         /* clear wol status */
1355         val &= ~PM_CTL_WUPS_;
1356         val |= PM_CTL_WUPS_WOL_;
1357
1358         ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1359         if (ret < 0)
1360                 return ret;
1361
1362         pdata->suspend_flags |= SUSPEND_SUSPEND3;
1363
1364         return 0;
1365 }
1366
1367 static int smsc95xx_autosuspend(struct usbnet *dev, u32 link_up)
1368 {
1369         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1370         int ret;
1371
1372         if (!netif_running(dev->net)) {
1373                 /* interface is ifconfig down so fully power down hw */
1374                 netdev_dbg(dev->net, "autosuspend entering SUSPEND2\n");
1375                 return smsc95xx_enter_suspend2(dev);
1376         }
1377
1378         if (!link_up) {
1379                 /* link is down so enter EDPD mode, but only if device can
1380                  * reliably resume from it.  This check should be redundant
1381                  * as current FEATURE_REMOTE_WAKEUP parts also support
1382                  * FEATURE_PHY_NLP_CROSSOVER but it's included for clarity */
1383                 if (!(pdata->features & FEATURE_PHY_NLP_CROSSOVER)) {
1384                         netdev_warn(dev->net, "EDPD not supported\n");
1385                         return -EBUSY;
1386                 }
1387
1388                 netdev_dbg(dev->net, "autosuspend entering SUSPEND1\n");
1389
1390                 /* enable PHY wakeup events for if cable is attached */
1391                 ret = smsc95xx_enable_phy_wakeup_interrupts(dev,
1392                         PHY_INT_MASK_ANEG_COMP_);
1393                 if (ret < 0) {
1394                         netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1395                         return ret;
1396                 }
1397
1398                 netdev_info(dev->net, "entering SUSPEND1 mode\n");
1399                 return smsc95xx_enter_suspend1(dev);
1400         }
1401
1402         /* enable PHY wakeup events so we remote wakeup if cable is pulled */
1403         ret = smsc95xx_enable_phy_wakeup_interrupts(dev,
1404                 PHY_INT_MASK_LINK_DOWN_);
1405         if (ret < 0) {
1406                 netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1407                 return ret;
1408         }
1409
1410         netdev_dbg(dev->net, "autosuspend entering SUSPEND3\n");
1411         return smsc95xx_enter_suspend3(dev);
1412 }
1413
1414 static int smsc95xx_suspend(struct usb_interface *intf, pm_message_t message)
1415 {
1416         struct usbnet *dev = usb_get_intfdata(intf);
1417         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1418         u32 val, link_up;
1419         int ret;
1420
1421         ret = usbnet_suspend(intf, message);
1422         if (ret < 0) {
1423                 netdev_warn(dev->net, "usbnet_suspend error\n");
1424                 return ret;
1425         }
1426
1427         if (pdata->suspend_flags) {
1428                 netdev_warn(dev->net, "error during last resume\n");
1429                 pdata->suspend_flags = 0;
1430         }
1431
1432         /* determine if link is up using only _nopm functions */
1433         link_up = smsc95xx_link_ok_nopm(dev);
1434
1435         if (message.event == PM_EVENT_AUTO_SUSPEND &&
1436             (pdata->features & FEATURE_REMOTE_WAKEUP)) {
1437                 ret = smsc95xx_autosuspend(dev, link_up);
1438                 goto done;
1439         }
1440
1441         /* if we get this far we're not autosuspending */
1442         /* if no wol options set, or if link is down and we're not waking on
1443          * PHY activity, enter lowest power SUSPEND2 mode
1444          */
1445         if (!(pdata->wolopts & SUPPORTED_WAKE) ||
1446                 !(link_up || (pdata->wolopts & WAKE_PHY))) {
1447                 netdev_info(dev->net, "entering SUSPEND2 mode\n");
1448
1449                 /* disable energy detect (link up) & wake up events */
1450                 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val);
1451                 if (ret < 0)
1452                         goto done;
1453
1454                 val &= ~(WUCSR_MPEN_ | WUCSR_WAKE_EN_);
1455
1456                 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val);
1457                 if (ret < 0)
1458                         goto done;
1459
1460                 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1461                 if (ret < 0)
1462                         goto done;
1463
1464                 val &= ~(PM_CTL_ED_EN_ | PM_CTL_WOL_EN_);
1465
1466                 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1467                 if (ret < 0)
1468                         goto done;
1469
1470                 ret = smsc95xx_enter_suspend2(dev);
1471                 goto done;
1472         }
1473
1474         if (pdata->wolopts & WAKE_PHY) {
1475                 ret = smsc95xx_enable_phy_wakeup_interrupts(dev,
1476                         (PHY_INT_MASK_ANEG_COMP_ | PHY_INT_MASK_LINK_DOWN_));
1477                 if (ret < 0) {
1478                         netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1479                         goto done;
1480                 }
1481
1482                 /* if link is down then configure EDPD and enter SUSPEND1,
1483                  * otherwise enter SUSPEND0 below
1484                  */
1485                 if (!link_up) {
1486                         netdev_info(dev->net, "entering SUSPEND1 mode\n");
1487                         ret = smsc95xx_enter_suspend1(dev);
1488                         goto done;
1489                 }
1490         }
1491
1492         if (pdata->wolopts & (WAKE_BCAST | WAKE_MCAST | WAKE_ARP | WAKE_UCAST)) {
1493                 u32 *filter_mask = kzalloc(sizeof(u32) * 32, GFP_KERNEL);
1494                 u32 command[2];
1495                 u32 offset[2];
1496                 u32 crc[4];
1497                 int wuff_filter_count =
1498                         (pdata->features & FEATURE_8_WAKEUP_FILTERS) ?
1499                         LAN9500A_WUFF_NUM : LAN9500_WUFF_NUM;
1500                 int i, filter = 0;
1501
1502                 if (!filter_mask) {
1503                         netdev_warn(dev->net, "Unable to allocate filter_mask\n");
1504                         ret = -ENOMEM;
1505                         goto done;
1506                 }
1507
1508                 memset(command, 0, sizeof(command));
1509                 memset(offset, 0, sizeof(offset));
1510                 memset(crc, 0, sizeof(crc));
1511
1512                 if (pdata->wolopts & WAKE_BCAST) {
1513                         const u8 bcast[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
1514                         netdev_info(dev->net, "enabling broadcast detection\n");
1515                         filter_mask[filter * 4] = 0x003F;
1516                         filter_mask[filter * 4 + 1] = 0x00;
1517                         filter_mask[filter * 4 + 2] = 0x00;
1518                         filter_mask[filter * 4 + 3] = 0x00;
1519                         command[filter/4] |= 0x05UL << ((filter % 4) * 8);
1520                         offset[filter/4] |= 0x00 << ((filter % 4) * 8);
1521                         crc[filter/2] |= smsc_crc(bcast, 6, filter);
1522                         filter++;
1523                 }
1524
1525                 if (pdata->wolopts & WAKE_MCAST) {
1526                         const u8 mcast[] = {0x01, 0x00, 0x5E};
1527                         netdev_info(dev->net, "enabling multicast detection\n");
1528                         filter_mask[filter * 4] = 0x0007;
1529                         filter_mask[filter * 4 + 1] = 0x00;
1530                         filter_mask[filter * 4 + 2] = 0x00;
1531                         filter_mask[filter * 4 + 3] = 0x00;
1532                         command[filter/4] |= 0x09UL << ((filter % 4) * 8);
1533                         offset[filter/4] |= 0x00  << ((filter % 4) * 8);
1534                         crc[filter/2] |= smsc_crc(mcast, 3, filter);
1535                         filter++;
1536                 }
1537
1538                 if (pdata->wolopts & WAKE_ARP) {
1539                         const u8 arp[] = {0x08, 0x06};
1540                         netdev_info(dev->net, "enabling ARP detection\n");
1541                         filter_mask[filter * 4] = 0x0003;
1542                         filter_mask[filter * 4 + 1] = 0x00;
1543                         filter_mask[filter * 4 + 2] = 0x00;
1544                         filter_mask[filter * 4 + 3] = 0x00;
1545                         command[filter/4] |= 0x05UL << ((filter % 4) * 8);
1546                         offset[filter/4] |= 0x0C << ((filter % 4) * 8);
1547                         crc[filter/2] |= smsc_crc(arp, 2, filter);
1548                         filter++;
1549                 }
1550
1551                 if (pdata->wolopts & WAKE_UCAST) {
1552                         netdev_info(dev->net, "enabling unicast detection\n");
1553                         filter_mask[filter * 4] = 0x003F;
1554                         filter_mask[filter * 4 + 1] = 0x00;
1555                         filter_mask[filter * 4 + 2] = 0x00;
1556                         filter_mask[filter * 4 + 3] = 0x00;
1557                         command[filter/4] |= 0x01UL << ((filter % 4) * 8);
1558                         offset[filter/4] |= 0x00 << ((filter % 4) * 8);
1559                         crc[filter/2] |= smsc_crc(dev->net->dev_addr, ETH_ALEN, filter);
1560                         filter++;
1561                 }
1562
1563                 for (i = 0; i < (wuff_filter_count * 4); i++) {
1564                         ret = smsc95xx_write_reg_nopm(dev, WUFF, filter_mask[i]);
1565                         if (ret < 0) {
1566                                 kfree(filter_mask);
1567                                 goto done;
1568                         }
1569                 }
1570                 kfree(filter_mask);
1571
1572                 for (i = 0; i < (wuff_filter_count / 4); i++) {
1573                         ret = smsc95xx_write_reg_nopm(dev, WUFF, command[i]);
1574                         if (ret < 0)
1575                                 goto done;
1576                 }
1577
1578                 for (i = 0; i < (wuff_filter_count / 4); i++) {
1579                         ret = smsc95xx_write_reg_nopm(dev, WUFF, offset[i]);
1580                         if (ret < 0)
1581                                 goto done;
1582                 }
1583
1584                 for (i = 0; i < (wuff_filter_count / 2); i++) {
1585                         ret = smsc95xx_write_reg_nopm(dev, WUFF, crc[i]);
1586                         if (ret < 0)
1587                                 goto done;
1588                 }
1589
1590                 /* clear any pending pattern match packet status */
1591                 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val);
1592                 if (ret < 0)
1593                         goto done;
1594
1595                 val |= WUCSR_WUFR_;
1596
1597                 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val);
1598                 if (ret < 0)
1599                         goto done;
1600         }
1601
1602         if (pdata->wolopts & WAKE_MAGIC) {
1603                 /* clear any pending magic packet status */
1604                 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val);
1605                 if (ret < 0)
1606                         goto done;
1607
1608                 val |= WUCSR_MPR_;
1609
1610                 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val);
1611                 if (ret < 0)
1612                         goto done;
1613         }
1614
1615         /* enable/disable wakeup sources */
1616         ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val);
1617         if (ret < 0)
1618                 goto done;
1619
1620         if (pdata->wolopts & (WAKE_BCAST | WAKE_MCAST | WAKE_ARP | WAKE_UCAST)) {
1621                 netdev_info(dev->net, "enabling pattern match wakeup\n");
1622                 val |= WUCSR_WAKE_EN_;
1623         } else {
1624                 netdev_info(dev->net, "disabling pattern match wakeup\n");
1625                 val &= ~WUCSR_WAKE_EN_;
1626         }
1627
1628         if (pdata->wolopts & WAKE_MAGIC) {
1629                 netdev_info(dev->net, "enabling magic packet wakeup\n");
1630                 val |= WUCSR_MPEN_;
1631         } else {
1632                 netdev_info(dev->net, "disabling magic packet wakeup\n");
1633                 val &= ~WUCSR_MPEN_;
1634         }
1635
1636         ret = smsc95xx_write_reg_nopm(dev, WUCSR, val);
1637         if (ret < 0)
1638                 goto done;
1639
1640         /* enable wol wakeup source */
1641         ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1642         if (ret < 0)
1643                 goto done;
1644
1645         val |= PM_CTL_WOL_EN_;
1646
1647         /* phy energy detect wakeup source */
1648         if (pdata->wolopts & WAKE_PHY)
1649                 val |= PM_CTL_ED_EN_;
1650
1651         ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1652         if (ret < 0)
1653                 goto done;
1654
1655         /* enable receiver to enable frame reception */
1656         smsc95xx_start_rx_path(dev, 1);
1657
1658         /* some wol options are enabled, so enter SUSPEND0 */
1659         netdev_info(dev->net, "entering SUSPEND0 mode\n");
1660         ret = smsc95xx_enter_suspend0(dev);
1661
1662 done:
1663         /*
1664          * TODO: resume() might need to handle the suspend failure
1665          * in system sleep
1666          */
1667         if (ret && PMSG_IS_AUTO(message))
1668                 usbnet_resume(intf);
1669         return ret;
1670 }
1671
1672 static int smsc95xx_resume(struct usb_interface *intf)
1673 {
1674         struct usbnet *dev = usb_get_intfdata(intf);
1675         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1676         u8 suspend_flags = pdata->suspend_flags;
1677         int ret;
1678         u32 val;
1679
1680         BUG_ON(!dev);
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 void smsc95xx_rx_csum_offload(struct sk_buff *skb)
1720 {
1721         skb->csum = *(u16 *)(skb_tail_pointer(skb) - 2);
1722         skb->ip_summed = CHECKSUM_COMPLETE;
1723         skb_trim(skb, skb->len - 2);
1724 }
1725
1726 static int smsc95xx_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
1727 {
1728         while (skb->len > 0) {
1729                 u32 header, align_count;
1730                 struct sk_buff *ax_skb;
1731                 unsigned char *packet;
1732                 u16 size;
1733
1734                 memcpy(&header, skb->data, sizeof(header));
1735                 le32_to_cpus(&header);
1736                 skb_pull(skb, 4 + NET_IP_ALIGN);
1737                 packet = skb->data;
1738
1739                 /* get the packet length */
1740                 size = (u16)((header & RX_STS_FL_) >> 16);
1741                 align_count = (4 - ((size + NET_IP_ALIGN) % 4)) % 4;
1742
1743                 if (unlikely(header & RX_STS_ES_)) {
1744                         netif_dbg(dev, rx_err, dev->net,
1745                                   "Error header=0x%08x\n", header);
1746                         dev->net->stats.rx_errors++;
1747                         dev->net->stats.rx_dropped++;
1748
1749                         if (header & RX_STS_CRC_) {
1750                                 dev->net->stats.rx_crc_errors++;
1751                         } else {
1752                                 if (header & (RX_STS_TL_ | RX_STS_RF_))
1753                                         dev->net->stats.rx_frame_errors++;
1754
1755                                 if ((header & RX_STS_LE_) &&
1756                                         (!(header & RX_STS_FT_)))
1757                                         dev->net->stats.rx_length_errors++;
1758                         }
1759                 } else {
1760                         /* ETH_FRAME_LEN + 4(CRC) + 2(COE) + 4(Vlan) */
1761                         if (unlikely(size > (ETH_FRAME_LEN + 12))) {
1762                                 netif_dbg(dev, rx_err, dev->net,
1763                                           "size err header=0x%08x\n", header);
1764                                 return 0;
1765                         }
1766
1767                         /* last frame in this batch */
1768                         if (skb->len == size) {
1769                                 if (dev->net->features & NETIF_F_RXCSUM)
1770                                         smsc95xx_rx_csum_offload(skb);
1771                                 skb_trim(skb, skb->len - 4); /* remove fcs */
1772                                 skb->truesize = size + sizeof(struct sk_buff);
1773
1774                                 return 1;
1775                         }
1776
1777                         ax_skb = skb_clone(skb, GFP_ATOMIC);
1778                         if (unlikely(!ax_skb)) {
1779                                 netdev_warn(dev->net, "Error allocating skb\n");
1780                                 return 0;
1781                         }
1782
1783                         ax_skb->len = size;
1784                         ax_skb->data = packet;
1785                         skb_set_tail_pointer(ax_skb, size);
1786
1787                         if (dev->net->features & NETIF_F_RXCSUM)
1788                                 smsc95xx_rx_csum_offload(ax_skb);
1789                         skb_trim(ax_skb, ax_skb->len - 4); /* remove fcs */
1790                         ax_skb->truesize = size + sizeof(struct sk_buff);
1791
1792                         usbnet_skb_return(dev, ax_skb);
1793                 }
1794
1795                 skb_pull(skb, size);
1796
1797                 /* padding bytes before the next frame starts */
1798                 if (skb->len)
1799                         skb_pull(skb, align_count);
1800         }
1801
1802         if (unlikely(skb->len < 0)) {
1803                 netdev_warn(dev->net, "invalid rx length<0 %d\n", skb->len);
1804                 return 0;
1805         }
1806
1807         return 1;
1808 }
1809
1810 static u32 smsc95xx_calc_csum_preamble(struct sk_buff *skb)
1811 {
1812         u16 low_16 = (u16)skb_checksum_start_offset(skb);
1813         u16 high_16 = low_16 + skb->csum_offset;
1814         return (high_16 << 16) | low_16;
1815 }
1816
1817 static struct sk_buff *smsc95xx_tx_fixup(struct usbnet *dev,
1818                                          struct sk_buff *skb, gfp_t flags)
1819 {
1820         bool csum = skb->ip_summed == CHECKSUM_PARTIAL;
1821         int overhead = csum ? SMSC95XX_TX_OVERHEAD_CSUM : SMSC95XX_TX_OVERHEAD;
1822         u32 tx_cmd_a, tx_cmd_b;
1823
1824         /* We do not advertise SG, so skbs should be already linearized */
1825         BUG_ON(skb_shinfo(skb)->nr_frags);
1826
1827         if (skb_headroom(skb) < overhead) {
1828                 struct sk_buff *skb2 = skb_copy_expand(skb,
1829                         overhead, 0, flags);
1830                 dev_kfree_skb_any(skb);
1831                 skb = skb2;
1832                 if (!skb)
1833                         return NULL;
1834         }
1835
1836         if (csum) {
1837                 if (skb->len <= 45) {
1838                         /* workaround - hardware tx checksum does not work
1839                          * properly with extremely small packets */
1840                         long csstart = skb_checksum_start_offset(skb);
1841                         __wsum calc = csum_partial(skb->data + csstart,
1842                                 skb->len - csstart, 0);
1843                         *((__sum16 *)(skb->data + csstart
1844                                 + skb->csum_offset)) = csum_fold(calc);
1845
1846                         csum = false;
1847                 } else {
1848                         u32 csum_preamble = smsc95xx_calc_csum_preamble(skb);
1849                         skb_push(skb, 4);
1850                         cpu_to_le32s(&csum_preamble);
1851                         memcpy(skb->data, &csum_preamble, 4);
1852                 }
1853         }
1854
1855         skb_push(skb, 4);
1856         tx_cmd_b = (u32)(skb->len - 4);
1857         if (csum)
1858                 tx_cmd_b |= TX_CMD_B_CSUM_ENABLE;
1859         cpu_to_le32s(&tx_cmd_b);
1860         memcpy(skb->data, &tx_cmd_b, 4);
1861
1862         skb_push(skb, 4);
1863         tx_cmd_a = (u32)(skb->len - 8) | TX_CMD_A_FIRST_SEG_ |
1864                 TX_CMD_A_LAST_SEG_;
1865         cpu_to_le32s(&tx_cmd_a);
1866         memcpy(skb->data, &tx_cmd_a, 4);
1867
1868         return skb;
1869 }
1870
1871 static int smsc95xx_manage_power(struct usbnet *dev, int on)
1872 {
1873         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1874
1875         dev->intf->needs_remote_wakeup = on;
1876
1877         if (pdata->features & FEATURE_REMOTE_WAKEUP)
1878                 return 0;
1879
1880         /* this chip revision isn't capable of remote wakeup */
1881         netdev_info(dev->net, "hardware isn't capable of remote wakeup\n");
1882
1883         if (on)
1884                 usb_autopm_get_interface_no_resume(dev->intf);
1885         else
1886                 usb_autopm_put_interface(dev->intf);
1887
1888         return 0;
1889 }
1890
1891 static const struct driver_info smsc95xx_info = {
1892         .description    = "smsc95xx USB 2.0 Ethernet",
1893         .bind           = smsc95xx_bind,
1894         .unbind         = smsc95xx_unbind,
1895         .link_reset     = smsc95xx_link_reset,
1896         .reset          = smsc95xx_reset,
1897         .rx_fixup       = smsc95xx_rx_fixup,
1898         .tx_fixup       = smsc95xx_tx_fixup,
1899         .status         = smsc95xx_status,
1900         .manage_power   = smsc95xx_manage_power,
1901         .flags          = FLAG_ETHER | FLAG_SEND_ZLP | FLAG_LINK_INTR,
1902 };
1903
1904 static const struct usb_device_id products[] = {
1905         {
1906                 /* SMSC9500 USB Ethernet Device */
1907                 USB_DEVICE(0x0424, 0x9500),
1908                 .driver_info = (unsigned long) &smsc95xx_info,
1909         },
1910         {
1911                 /* SMSC9505 USB Ethernet Device */
1912                 USB_DEVICE(0x0424, 0x9505),
1913                 .driver_info = (unsigned long) &smsc95xx_info,
1914         },
1915         {
1916                 /* SMSC9500A USB Ethernet Device */
1917                 USB_DEVICE(0x0424, 0x9E00),
1918                 .driver_info = (unsigned long) &smsc95xx_info,
1919         },
1920         {
1921                 /* SMSC9505A USB Ethernet Device */
1922                 USB_DEVICE(0x0424, 0x9E01),
1923                 .driver_info = (unsigned long) &smsc95xx_info,
1924         },
1925         {
1926                 /* SMSC9512/9514 USB Hub & Ethernet Device */
1927                 USB_DEVICE(0x0424, 0xec00),
1928                 .driver_info = (unsigned long) &smsc95xx_info,
1929         },
1930         {
1931                 /* SMSC9500 USB Ethernet Device (SAL10) */
1932                 USB_DEVICE(0x0424, 0x9900),
1933                 .driver_info = (unsigned long) &smsc95xx_info,
1934         },
1935         {
1936                 /* SMSC9505 USB Ethernet Device (SAL10) */
1937                 USB_DEVICE(0x0424, 0x9901),
1938                 .driver_info = (unsigned long) &smsc95xx_info,
1939         },
1940         {
1941                 /* SMSC9500A USB Ethernet Device (SAL10) */
1942                 USB_DEVICE(0x0424, 0x9902),
1943                 .driver_info = (unsigned long) &smsc95xx_info,
1944         },
1945         {
1946                 /* SMSC9505A USB Ethernet Device (SAL10) */
1947                 USB_DEVICE(0x0424, 0x9903),
1948                 .driver_info = (unsigned long) &smsc95xx_info,
1949         },
1950         {
1951                 /* SMSC9512/9514 USB Hub & Ethernet Device (SAL10) */
1952                 USB_DEVICE(0x0424, 0x9904),
1953                 .driver_info = (unsigned long) &smsc95xx_info,
1954         },
1955         {
1956                 /* SMSC9500A USB Ethernet Device (HAL) */
1957                 USB_DEVICE(0x0424, 0x9905),
1958                 .driver_info = (unsigned long) &smsc95xx_info,
1959         },
1960         {
1961                 /* SMSC9505A USB Ethernet Device (HAL) */
1962                 USB_DEVICE(0x0424, 0x9906),
1963                 .driver_info = (unsigned long) &smsc95xx_info,
1964         },
1965         {
1966                 /* SMSC9500 USB Ethernet Device (Alternate ID) */
1967                 USB_DEVICE(0x0424, 0x9907),
1968                 .driver_info = (unsigned long) &smsc95xx_info,
1969         },
1970         {
1971                 /* SMSC9500A USB Ethernet Device (Alternate ID) */
1972                 USB_DEVICE(0x0424, 0x9908),
1973                 .driver_info = (unsigned long) &smsc95xx_info,
1974         },
1975         {
1976                 /* SMSC9512/9514 USB Hub & Ethernet Device (Alternate ID) */
1977                 USB_DEVICE(0x0424, 0x9909),
1978                 .driver_info = (unsigned long) &smsc95xx_info,
1979         },
1980         {
1981                 /* SMSC LAN9530 USB Ethernet Device */
1982                 USB_DEVICE(0x0424, 0x9530),
1983                 .driver_info = (unsigned long) &smsc95xx_info,
1984         },
1985         {
1986                 /* SMSC LAN9730 USB Ethernet Device */
1987                 USB_DEVICE(0x0424, 0x9730),
1988                 .driver_info = (unsigned long) &smsc95xx_info,
1989         },
1990         {
1991                 /* SMSC LAN89530 USB Ethernet Device */
1992                 USB_DEVICE(0x0424, 0x9E08),
1993                 .driver_info = (unsigned long) &smsc95xx_info,
1994         },
1995         { },            /* END */
1996 };
1997 MODULE_DEVICE_TABLE(usb, products);
1998
1999 static struct usb_driver smsc95xx_driver = {
2000         .name           = "smsc95xx",
2001         .id_table       = products,
2002         .probe          = usbnet_probe,
2003         .suspend        = smsc95xx_suspend,
2004         .resume         = smsc95xx_resume,
2005         .reset_resume   = smsc95xx_resume,
2006         .disconnect     = usbnet_disconnect,
2007         .disable_hub_initiated_lpm = 1,
2008         .supports_autosuspend = 1,
2009 };
2010
2011 module_usb_driver(smsc95xx_driver);
2012
2013 MODULE_AUTHOR("Nancy Lin");
2014 MODULE_AUTHOR("Steve Glendinning <steve.glendinning@shawell.net>");
2015 MODULE_DESCRIPTION("SMSC95XX USB 2.0 Ethernet Devices");
2016 MODULE_LICENSE("GPL");