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 #define CARRIER_CHECK_DELAY (2 * HZ)
  65
  66 struct smsc95xx_priv {
  67         u32 mac_cr;
  68         u32 hash_hi;
  69         u32 hash_lo;
  70         u32 wolopts;
  71         spinlock_t mac_cr_lock;
  72         u8 features;
  73         u8 suspend_flags;
  74         bool link_ok;
  75         struct delayed_work carrier_check;
  76         struct usbnet *dev;
  77 };
  78
  79 static bool turbo_mode = true;
  80 module_param(turbo_mode, bool, 0644);
  81 MODULE_PARM_DESC(turbo_mode, "Enable multiple frames per Rx transaction");
  82
  83 static int __must_check __smsc95xx_read_reg(struct usbnet *dev, u32 index,
  84                                             u32 *data, int in_pm)
  85 {
  86         u32 buf;
  87         int ret;
  88         int (*fn)(struct usbnet *, u8, u8, u16, u16, void *, u16);
  89
  90         BUG_ON(!dev);
  91
  92         if (!in_pm)
  93                 fn = usbnet_read_cmd;
  94         else
  95                 fn = usbnet_read_cmd_nopm;
  96
  97         ret = fn(dev, USB_VENDOR_REQUEST_READ_REGISTER, USB_DIR_IN
  98                  | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
  99                  0, index, &buf, 4);
 100         if (unlikely(ret < 0)) {
 101                 netdev_warn(dev->net, "Failed to read reg index 0x%08x: %d\n",
 102                             index, ret);
 103                 return ret;
 104         }
 105
 106         le32_to_cpus(&buf);
 107         *data = buf;
 108
 109         return ret;
 110 }
 111
 112 static int __must_check __smsc95xx_write_reg(struct usbnet *dev, u32 index,
 113                                              u32 data, int in_pm)
 114 {
 115         u32 buf;
 116         int ret;
 117         int (*fn)(struct usbnet *, u8, u8, u16, u16, const void *, u16);
 118
 119         BUG_ON(!dev);
 120
 121         if (!in_pm)
 122                 fn = usbnet_write_cmd;
 123         else
 124                 fn = usbnet_write_cmd_nopm;
 125
 126         buf = data;
 127         cpu_to_le32s(&buf);
 128
 129         ret = fn(dev, USB_VENDOR_REQUEST_WRITE_REGISTER, USB_DIR_OUT
 130                  | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 131                  0, index, &buf, 4);
 132         if (unlikely(ret < 0))
 133                 netdev_warn(dev->net, "Failed to write reg index 0x%08x: %d\n",
 134                             index, ret);
 135
 136         return ret;
 137 }
 138
 139 static int __must_check smsc95xx_read_reg_nopm(struct usbnet *dev, u32 index,
 140                                                u32 *data)
 141 {
 142         return __smsc95xx_read_reg(dev, index, data, 1);
 143 }
 144
 145 static int __must_check smsc95xx_write_reg_nopm(struct usbnet *dev, u32 index,
 146                                                 u32 data)
 147 {
 148         return __smsc95xx_write_reg(dev, index, data, 1);
 149 }
 150
 151 static int __must_check smsc95xx_read_reg(struct usbnet *dev, u32 index,
 152                                           u32 *data)
 153 {
 154         return __smsc95xx_read_reg(dev, index, data, 0);
 155 }
 156
 157 static int __must_check smsc95xx_write_reg(struct usbnet *dev, u32 index,
 158                                            u32 data)
 159 {
 160         return __smsc95xx_write_reg(dev, index, data, 0);
 161 }
 162
 163 /* Loop until the read is completed with timeout
 164  * called with phy_mutex held */
 165 static int __must_check __smsc95xx_phy_wait_not_busy(struct usbnet *dev,
 166                                                      int in_pm)
 167 {
 168         unsigned long start_time = jiffies;
 169         u32 val;
 170         int ret;
 171
 172         do {
 173                 ret = __smsc95xx_read_reg(dev, MII_ADDR, &val, in_pm);
 174                 if (ret < 0) {
 175                         netdev_warn(dev->net, "Error reading MII_ACCESS\n");
 176                         return ret;
 177                 }
 178
 179                 if (!(val & MII_BUSY_))
 180                         return 0;
 181         } while (!time_after(jiffies, start_time + HZ));
 182
 183         return -EIO;
 184 }
 185
 186 static int __smsc95xx_mdio_read(struct net_device *netdev, int phy_id, int idx,
 187                                 int in_pm)
 188 {
 189         struct usbnet *dev = netdev_priv(netdev);
 190         u32 val, addr;
 191         int ret;
 192
 193         mutex_lock(&dev->phy_mutex);
 194
 195         /* confirm MII not busy */
 196         ret = __smsc95xx_phy_wait_not_busy(dev, in_pm);
 197         if (ret < 0) {
 198                 netdev_warn(dev->net, "MII is busy in smsc95xx_mdio_read\n");
 199                 goto done;
 200         }
 201
 202         /* set the address, index & direction (read from PHY) */
 203         phy_id &= dev->mii.phy_id_mask;
 204         idx &= dev->mii.reg_num_mask;
 205         addr = (phy_id << 11) | (idx << 6) | MII_READ_ | MII_BUSY_;
 206         ret = __smsc95xx_write_reg(dev, MII_ADDR, addr, in_pm);
 207         if (ret < 0) {
 208                 netdev_warn(dev->net, "Error writing MII_ADDR\n");
 209                 goto done;
 210         }
 211
 212         ret = __smsc95xx_phy_wait_not_busy(dev, in_pm);
 213         if (ret < 0) {
 214                 netdev_warn(dev->net, "Timed out reading MII reg %02X\n", idx);
 215                 goto done;
 216         }
 217
 218         ret = __smsc95xx_read_reg(dev, MII_DATA, &val, in_pm);
 219         if (ret < 0) {
 220                 netdev_warn(dev->net, "Error reading MII_DATA\n");
 221                 goto done;
 222         }
 223
 224         ret = (u16)(val & 0xFFFF);
 225
 226 done:
 227         mutex_unlock(&dev->phy_mutex);
 228         return ret;
 229 }
 230
 231 static void __smsc95xx_mdio_write(struct net_device *netdev, int phy_id,
 232                                   int idx, int regval, int in_pm)
 233 {
 234         struct usbnet *dev = netdev_priv(netdev);
 235         u32 val, addr;
 236         int ret;
 237
 238         mutex_lock(&dev->phy_mutex);
 239
 240         /* confirm MII not busy */
 241         ret = __smsc95xx_phy_wait_not_busy(dev, in_pm);
 242         if (ret < 0) {
 243                 netdev_warn(dev->net, "MII is busy in smsc95xx_mdio_write\n");
 244                 goto done;
 245         }
 246
 247         val = regval;
 248         ret = __smsc95xx_write_reg(dev, MII_DATA, val, in_pm);
 249         if (ret < 0) {
 250                 netdev_warn(dev->net, "Error writing MII_DATA\n");
 251                 goto done;
 252         }
 253
 254         /* set the address, index & direction (write to PHY) */
 255         phy_id &= dev->mii.phy_id_mask;
 256         idx &= dev->mii.reg_num_mask;
 257         addr = (phy_id << 11) | (idx << 6) | MII_WRITE_ | MII_BUSY_;
 258         ret = __smsc95xx_write_reg(dev, MII_ADDR, addr, in_pm);
 259         if (ret < 0) {
 260                 netdev_warn(dev->net, "Error writing MII_ADDR\n");
 261                 goto done;
 262         }
 263
 264         ret = __smsc95xx_phy_wait_not_busy(dev, in_pm);
 265         if (ret < 0) {
 266                 netdev_warn(dev->net, "Timed out writing MII reg %02X\n", idx);
 267                 goto done;
 268         }
 269
 270 done:
 271         mutex_unlock(&dev->phy_mutex);
 272 }
 273
 274 static int smsc95xx_mdio_read_nopm(struct net_device *netdev, int phy_id,
 275                                    int idx)
 276 {
 277         return __smsc95xx_mdio_read(netdev, phy_id, idx, 1);
 278 }
 279
 280 static void smsc95xx_mdio_write_nopm(struct net_device *netdev, int phy_id,
 281                                      int idx, int regval)
 282 {
 283         __smsc95xx_mdio_write(netdev, phy_id, idx, regval, 1);
 284 }
 285
 286 static int smsc95xx_mdio_read(struct net_device *netdev, int phy_id, int idx)
 287 {
 288         return __smsc95xx_mdio_read(netdev, phy_id, idx, 0);
 289 }
 290
 291 static void smsc95xx_mdio_write(struct net_device *netdev, int phy_id, int idx,
 292                                 int regval)
 293 {
 294         __smsc95xx_mdio_write(netdev, phy_id, idx, regval, 0);
 295 }
 296
 297 static int __must_check smsc95xx_wait_eeprom(struct usbnet *dev)
 298 {
 299         unsigned long start_time = jiffies;
 300         u32 val;
 301         int ret;
 302
 303         do {
 304                 ret = smsc95xx_read_reg(dev, E2P_CMD, &val);
 305                 if (ret < 0) {
 306                         netdev_warn(dev->net, "Error reading E2P_CMD\n");
 307                         return ret;
 308                 }
 309
 310                 if (!(val & E2P_CMD_BUSY_) || (val & E2P_CMD_TIMEOUT_))
 311                         break;
 312                 udelay(40);
 313         } while (!time_after(jiffies, start_time + HZ));
 314
 315         if (val & (E2P_CMD_TIMEOUT_ | E2P_CMD_BUSY_)) {
 316                 netdev_warn(dev->net, "EEPROM read operation timeout\n");
 317                 return -EIO;
 318         }
 319
 320         return 0;
 321 }
 322
 323 static int __must_check smsc95xx_eeprom_confirm_not_busy(struct usbnet *dev)
 324 {
 325         unsigned long start_time = jiffies;
 326         u32 val;
 327         int ret;
 328
 329         do {
 330                 ret = smsc95xx_read_reg(dev, E2P_CMD, &val);
 331                 if (ret < 0) {
 332                         netdev_warn(dev->net, "Error reading E2P_CMD\n");
 333                         return ret;
 334                 }
 335
 336                 if (!(val & E2P_CMD_BUSY_))
 337                         return 0;
 338
 339                 udelay(40);
 340         } while (!time_after(jiffies, start_time + HZ));
 341
 342         netdev_warn(dev->net, "EEPROM is busy\n");
 343         return -EIO;
 344 }
 345
 346 static int smsc95xx_read_eeprom(struct usbnet *dev, u32 offset, u32 length,
 347                                 u8 *data)
 348 {
 349         u32 val;
 350         int i, ret;
 351
 352         BUG_ON(!dev);
 353         BUG_ON(!data);
 354
 355         ret = smsc95xx_eeprom_confirm_not_busy(dev);
 356         if (ret)
 357                 return ret;
 358
 359         for (i = 0; i < length; i++) {
 360                 val = E2P_CMD_BUSY_ | E2P_CMD_READ_ | (offset & E2P_CMD_ADDR_);
 361                 ret = smsc95xx_write_reg(dev, E2P_CMD, val);
 362                 if (ret < 0) {
 363                         netdev_warn(dev->net, "Error writing E2P_CMD\n");
 364                         return ret;
 365                 }
 366
 367                 ret = smsc95xx_wait_eeprom(dev);
 368                 if (ret < 0)
 369                         return ret;
 370
 371                 ret = smsc95xx_read_reg(dev, E2P_DATA, &val);
 372                 if (ret < 0) {
 373                         netdev_warn(dev->net, "Error reading E2P_DATA\n");
 374                         return ret;
 375                 }
 376
 377                 data[i] = val & 0xFF;
 378                 offset++;
 379         }
 380
 381         return 0;
 382 }
 383
 384 static int smsc95xx_write_eeprom(struct usbnet *dev, u32 offset, u32 length,
 385                                  u8 *data)
 386 {
 387         u32 val;
 388         int i, ret;
 389
 390         BUG_ON(!dev);
 391         BUG_ON(!data);
 392
 393         ret = smsc95xx_eeprom_confirm_not_busy(dev);
 394         if (ret)
 395                 return ret;
 396
 397         /* Issue write/erase enable command */
 398         val = E2P_CMD_BUSY_ | E2P_CMD_EWEN_;
 399         ret = smsc95xx_write_reg(dev, E2P_CMD, val);
 400         if (ret < 0) {
 401                 netdev_warn(dev->net, "Error writing E2P_DATA\n");
 402                 return ret;
 403         }
 404
 405         ret = smsc95xx_wait_eeprom(dev);
 406         if (ret < 0)
 407                 return ret;
 408
 409         for (i = 0; i < length; i++) {
 410
 411                 /* Fill data register */
 412                 val = data[i];
 413                 ret = smsc95xx_write_reg(dev, E2P_DATA, val);
 414                 if (ret < 0) {
 415                         netdev_warn(dev->net, "Error writing E2P_DATA\n");
 416                         return ret;
 417                 }
 418
 419                 /* Send "write" command */
 420                 val = E2P_CMD_BUSY_ | E2P_CMD_WRITE_ | (offset & E2P_CMD_ADDR_);
 421                 ret = smsc95xx_write_reg(dev, E2P_CMD, val);
 422                 if (ret < 0) {
 423                         netdev_warn(dev->net, "Error writing E2P_CMD\n");
 424                         return ret;
 425                 }
 426
 427                 ret = smsc95xx_wait_eeprom(dev);
 428                 if (ret < 0)
 429                         return ret;
 430
 431                 offset++;
 432         }
 433
 434         return 0;
 435 }
 436
 437 static int __must_check smsc95xx_write_reg_async(struct usbnet *dev, u16 index,
 438                                                  u32 data)
 439 {
 440         const u16 size = 4;
 441         u32 buf;
 442         int ret;
 443
 444         buf = data;
 445         cpu_to_le32s(&buf);
 446
 447         ret = usbnet_write_cmd_async(dev, USB_VENDOR_REQUEST_WRITE_REGISTER,
 448                                      USB_DIR_OUT | USB_TYPE_VENDOR |
 449                                      USB_RECIP_DEVICE,
 450                                      0, index, &buf, size);
 451         if (ret < 0)
 452                 netdev_warn(dev->net, "Error write async cmd, sts=%d\n",
 453                             ret);
 454         return ret;
 455 }
 456
 457 /* returns hash bit number for given MAC address
 458  * example:
 459  * 01 00 5E 00 00 01 -> returns bit number 31 */
 460 static unsigned int smsc95xx_hash(char addr[ETH_ALEN])
 461 {
 462         return (ether_crc(ETH_ALEN, addr) >> 26) & 0x3f;
 463 }
 464
 465 static void smsc95xx_set_multicast(struct net_device *netdev)
 466 {
 467         struct usbnet *dev = netdev_priv(netdev);
 468         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
 469         unsigned long flags;
 470         int ret;
 471
 472         pdata->hash_hi = 0;
 473         pdata->hash_lo = 0;
 474
 475         spin_lock_irqsave(&pdata->mac_cr_lock, flags);
 476
 477         if (dev->net->flags & IFF_PROMISC) {
 478                 netif_dbg(dev, drv, dev->net, "promiscuous mode enabled\n");
 479                 pdata->mac_cr |= MAC_CR_PRMS_;
 480                 pdata->mac_cr &= ~(MAC_CR_MCPAS_ | MAC_CR_HPFILT_);
 481         } else if (dev->net->flags & IFF_ALLMULTI) {
 482                 netif_dbg(dev, drv, dev->net, "receive all multicast enabled\n");
 483                 pdata->mac_cr |= MAC_CR_MCPAS_;
 484                 pdata->mac_cr &= ~(MAC_CR_PRMS_ | MAC_CR_HPFILT_);
 485         } else if (!netdev_mc_empty(dev->net)) {
 486                 struct netdev_hw_addr *ha;
 487
 488                 pdata->mac_cr |= MAC_CR_HPFILT_;
 489                 pdata->mac_cr &= ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_);
 490
 491                 netdev_for_each_mc_addr(ha, netdev) {
 492                         u32 bitnum = smsc95xx_hash(ha->addr);
 493                         u32 mask = 0x01 << (bitnum & 0x1F);
 494                         if (bitnum & 0x20)
 495                                 pdata->hash_hi |= mask;
 496                         else
 497                                 pdata->hash_lo |= mask;
 498                 }
 499
 500                 netif_dbg(dev, drv, dev->net, "HASHH=0x%08X, HASHL=0x%08X\n",
 501                                    pdata->hash_hi, pdata->hash_lo);
 502         } else {
 503                 netif_dbg(dev, drv, dev->net, "receive own packets only\n");
 504                 pdata->mac_cr &=
 505                         ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_ | MAC_CR_HPFILT_);
 506         }
 507
 508         spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
 509
 510         /* Initiate async writes, as we can't wait for completion here */
 511         ret = smsc95xx_write_reg_async(dev, HASHH, pdata->hash_hi);
 512         if (ret < 0)
 513                 netdev_warn(dev->net, "failed to initiate async write to HASHH\n");
 514
 515         ret = smsc95xx_write_reg_async(dev, HASHL, pdata->hash_lo);
 516         if (ret < 0)
 517                 netdev_warn(dev->net, "failed to initiate async write to HASHL\n");
 518
 519         ret = smsc95xx_write_reg_async(dev, MAC_CR, pdata->mac_cr);
 520         if (ret < 0)
 521                 netdev_warn(dev->net, "failed to initiate async write to MAC_CR\n");
 522 }
 523
 524 static int smsc95xx_phy_update_flowcontrol(struct usbnet *dev, u8 duplex,
 525                                            u16 lcladv, u16 rmtadv)
 526 {
 527         u32 flow, afc_cfg = 0;
 528
 529         int ret = smsc95xx_read_reg(dev, AFC_CFG, &afc_cfg);
 530         if (ret < 0)
 531                 return ret;
 532
 533         if (duplex == DUPLEX_FULL) {
 534                 u8 cap = mii_resolve_flowctrl_fdx(lcladv, rmtadv);
 535
 536                 if (cap & FLOW_CTRL_RX)
 537                         flow = 0xFFFF0002;
 538                 else
 539                         flow = 0;
 540
 541                 if (cap & FLOW_CTRL_TX)
 542                         afc_cfg |= 0xF;
 543                 else
 544                         afc_cfg &= ~0xF;
 545
 546                 netif_dbg(dev, link, dev->net, "rx pause %s, tx pause %s\n",
 547                                    cap & FLOW_CTRL_RX ? "enabled" : "disabled",
 548                                    cap & FLOW_CTRL_TX ? "enabled" : "disabled");
 549         } else {
 550                 netif_dbg(dev, link, dev->net, "half duplex\n");
 551                 flow = 0;
 552                 afc_cfg |= 0xF;
 553         }
 554
 555         ret = smsc95xx_write_reg(dev, FLOW, flow);
 556         if (ret < 0)
 557                 return ret;
 558
 559         return smsc95xx_write_reg(dev, AFC_CFG, afc_cfg);
 560 }
 561
 562 static int smsc95xx_link_reset(struct usbnet *dev)
 563 {
 564         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
 565         struct mii_if_info *mii = &dev->mii;
 566         struct ethtool_cmd ecmd = { .cmd = ETHTOOL_GSET };
 567         unsigned long flags;
 568         u16 lcladv, rmtadv;
 569         int ret;
 570
 571         /* clear interrupt status */
 572         ret = smsc95xx_mdio_read(dev->net, mii->phy_id, PHY_INT_SRC);
 573         if (ret < 0)
 574                 return ret;
 575
 576         ret = smsc95xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL_);
 577         if (ret < 0)
 578                 return ret;
 579
 580         mii_check_media(mii, 1, 1);
 581         mii_ethtool_gset(&dev->mii, &ecmd);
 582         lcladv = smsc95xx_mdio_read(dev->net, mii->phy_id, MII_ADVERTISE);
 583         rmtadv = smsc95xx_mdio_read(dev->net, mii->phy_id, MII_LPA);
 584
 585         netif_dbg(dev, link, dev->net,
 586                   "speed: %u duplex: %d lcladv: %04x rmtadv: %04x\n",
 587                   ethtool_cmd_speed(&ecmd), ecmd.duplex, lcladv, rmtadv);
 588
 589         spin_lock_irqsave(&pdata->mac_cr_lock, flags);
 590         if (ecmd.duplex != DUPLEX_FULL) {
 591                 pdata->mac_cr &= ~MAC_CR_FDPX_;
 592                 pdata->mac_cr |= MAC_CR_RCVOWN_;
 593         } else {
 594                 pdata->mac_cr &= ~MAC_CR_RCVOWN_;
 595                 pdata->mac_cr |= MAC_CR_FDPX_;
 596         }
 597         spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
 598
 599         ret = smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr);
 600         if (ret < 0)
 601                 return ret;
 602
 603         ret = smsc95xx_phy_update_flowcontrol(dev, ecmd.duplex, lcladv, rmtadv);
 604         if (ret < 0)
 605                 netdev_warn(dev->net, "Error updating PHY flow control\n");
 606
 607         return ret;
 608 }
 609
 610 static void smsc95xx_status(struct usbnet *dev, struct urb *urb)
 611 {
 612         u32 intdata;
 613
 614         if (urb->actual_length != 4) {
 615                 netdev_warn(dev->net, "unexpected urb length %d\n",
 616                             urb->actual_length);
 617                 return;
 618         }
 619
 620         memcpy(&intdata, urb->transfer_buffer, 4);
 621         le32_to_cpus(&intdata);
 622
 623         netif_dbg(dev, link, dev->net, "intdata: 0x%08X\n", intdata);
 624
 625         if (intdata & INT_ENP_PHY_INT_)
 626                 usbnet_defer_kevent(dev, EVENT_LINK_RESET);
 627         else
 628                 netdev_warn(dev->net, "unexpected interrupt, intdata=0x%08X\n",
 629                             intdata);
 630 }
 631
 632 static void set_carrier(struct usbnet *dev, bool link)
 633 {
 634         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
 635
 636         if (pdata->link_ok == link)
 637                 return;
 638
 639         pdata->link_ok = link;
 640
 641         if (link)
 642                 usbnet_link_change(dev, 1, 0);
 643         else
 644                 usbnet_link_change(dev, 0, 0);
 645 }
 646
 647 static void check_carrier(struct work_struct *work)
 648 {
 649         struct smsc95xx_priv *pdata = container_of(work, struct smsc95xx_priv,
 650                                                 carrier_check.work);
 651         struct usbnet *dev = pdata->dev;
 652         int ret;
 653
 654         if (pdata->suspend_flags != 0)
 655                 return;
 656
 657         ret = smsc95xx_mdio_read(dev->net, dev->mii.phy_id, MII_BMSR);
 658         if (ret < 0) {
 659                 netdev_warn(dev->net, "Failed to read MII_BMSR\n");
 660                 return;
 661         }
 662         if (ret & BMSR_LSTATUS)
 663                 set_carrier(dev, 1);
 664         else
 665                 set_carrier(dev, 0);
 666
 667         schedule_delayed_work(&pdata->carrier_check, CARRIER_CHECK_DELAY);
 668 }
 669
 670 /* Enable or disable Tx & Rx checksum offload engines */
 671 static int smsc95xx_set_features(struct net_device *netdev,
 672         netdev_features_t features)
 673 {
 674         struct usbnet *dev = netdev_priv(netdev);
 675         u32 read_buf;
 676         int ret;
 677
 678         ret = smsc95xx_read_reg(dev, COE_CR, &read_buf);
 679         if (ret < 0)
 680                 return ret;
 681
 682         if (features & NETIF_F_HW_CSUM)
 683                 read_buf |= Tx_COE_EN_;
 684         else
 685                 read_buf &= ~Tx_COE_EN_;
 686
 687         if (features & NETIF_F_RXCSUM)
 688                 read_buf |= Rx_COE_EN_;
 689         else
 690                 read_buf &= ~Rx_COE_EN_;
 691
 692         ret = smsc95xx_write_reg(dev, COE_CR, read_buf);
 693         if (ret < 0)
 694                 return ret;
 695
 696         netif_dbg(dev, hw, dev->net, "COE_CR = 0x%08x\n", read_buf);
 697         return 0;
 698 }
 699
 700 static int smsc95xx_ethtool_get_eeprom_len(struct net_device *net)
 701 {
 702         return MAX_EEPROM_SIZE;
 703 }
 704
 705 static int smsc95xx_ethtool_get_eeprom(struct net_device *netdev,
 706                                        struct ethtool_eeprom *ee, u8 *data)
 707 {
 708         struct usbnet *dev = netdev_priv(netdev);
 709
 710         ee->magic = LAN95XX_EEPROM_MAGIC;
 711
 712         return smsc95xx_read_eeprom(dev, ee->offset, ee->len, data);
 713 }
 714
 715 static int smsc95xx_ethtool_set_eeprom(struct net_device *netdev,
 716                                        struct ethtool_eeprom *ee, u8 *data)
 717 {
 718         struct usbnet *dev = netdev_priv(netdev);
 719
 720         if (ee->magic != LAN95XX_EEPROM_MAGIC) {
 721                 netdev_warn(dev->net, "EEPROM: magic value mismatch, magic = 0x%x\n",
 722                             ee->magic);
 723                 return -EINVAL;
 724         }
 725
 726         return smsc95xx_write_eeprom(dev, ee->offset, ee->len, data);
 727 }
 728
 729 static int smsc95xx_ethtool_getregslen(struct net_device *netdev)
 730 {
 731         /* all smsc95xx registers */
 732         return COE_CR - ID_REV + sizeof(u32);
 733 }
 734
 735 static void
 736 smsc95xx_ethtool_getregs(struct net_device *netdev, struct ethtool_regs *regs,
 737                          void *buf)
 738 {
 739         struct usbnet *dev = netdev_priv(netdev);
 740         unsigned int i, j;
 741         int retval;
 742         u32 *data = buf;
 743
 744         retval = smsc95xx_read_reg(dev, ID_REV, &regs->version);
 745         if (retval < 0) {
 746                 netdev_warn(netdev, "REGS: cannot read ID_REV\n");
 747                 return;
 748         }
 749
 750         for (i = ID_REV, j = 0; i <= COE_CR; i += (sizeof(u32)), j++) {
 751                 retval = smsc95xx_read_reg(dev, i, &data[j]);
 752                 if (retval < 0) {
 753                         netdev_warn(netdev, "REGS: cannot read reg[%x]\n", i);
 754                         return;
 755                 }
 756         }
 757 }
 758
 759 static void smsc95xx_ethtool_get_wol(struct net_device *net,
 760                                      struct ethtool_wolinfo *wolinfo)
 761 {
 762         struct usbnet *dev = netdev_priv(net);
 763         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
 764
 765         wolinfo->supported = SUPPORTED_WAKE;
 766         wolinfo->wolopts = pdata->wolopts;
 767 }
 768
 769 static int smsc95xx_ethtool_set_wol(struct net_device *net,
 770                                     struct ethtool_wolinfo *wolinfo)
 771 {
 772         struct usbnet *dev = netdev_priv(net);
 773         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
 774         int ret;
 775
 776         pdata->wolopts = wolinfo->wolopts & SUPPORTED_WAKE;
 777
 778         ret = device_set_wakeup_enable(&dev->udev->dev, pdata->wolopts);
 779         if (ret < 0)
 780                 netdev_warn(dev->net, "device_set_wakeup_enable error %d\n", ret);
 781
 782         return ret;
 783 }
 784
 785 static const struct ethtool_ops smsc95xx_ethtool_ops = {
 786         .get_link       = usbnet_get_link,
 787         .nway_reset     = usbnet_nway_reset,
 788         .get_drvinfo    = usbnet_get_drvinfo,
 789         .get_msglevel   = usbnet_get_msglevel,
 790         .set_msglevel   = usbnet_set_msglevel,
 791         .get_settings   = usbnet_get_settings,
 792         .set_settings   = usbnet_set_settings,
 793         .get_eeprom_len = smsc95xx_ethtool_get_eeprom_len,
 794         .get_eeprom     = smsc95xx_ethtool_get_eeprom,
 795         .set_eeprom     = smsc95xx_ethtool_set_eeprom,
 796         .get_regs_len   = smsc95xx_ethtool_getregslen,
 797         .get_regs       = smsc95xx_ethtool_getregs,
 798         .get_wol        = smsc95xx_ethtool_get_wol,
 799         .set_wol        = smsc95xx_ethtool_set_wol,
 800 };
 801
 802 static int smsc95xx_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
 803 {
 804         struct usbnet *dev = netdev_priv(netdev);
 805
 806         if (!netif_running(netdev))
 807                 return -EINVAL;
 808
 809         return generic_mii_ioctl(&dev->mii, if_mii(rq), cmd, NULL);
 810 }
 811
 812 static void smsc95xx_init_mac_address(struct usbnet *dev)
 813 {
 814         const u8 *mac_addr;
 815
 816         /* maybe the boot loader passed the MAC address in devicetree */
 817         mac_addr = of_get_mac_address(dev->udev->dev.of_node);
 818         if (mac_addr) {
 819                 memcpy(dev->net->dev_addr, mac_addr, ETH_ALEN);
 820                 return;
 821         }
 822
 823         /* try reading mac address from EEPROM */
 824         if (smsc95xx_read_eeprom(dev, EEPROM_MAC_OFFSET, ETH_ALEN,
 825                         dev->net->dev_addr) == 0) {
 826                 if (is_valid_ether_addr(dev->net->dev_addr)) {
 827                         /* eeprom values are valid so use them */
 828                         netif_dbg(dev, ifup, dev->net, "MAC address read from EEPROM\n");
 829                         return;
 830                 }
 831         }
 832
 833         /* no useful static MAC address found. generate a random one */
 834         eth_hw_addr_random(dev->net);
 835         netif_dbg(dev, ifup, dev->net, "MAC address set to eth_random_addr\n");
 836 }
 837
 838 static int smsc95xx_set_mac_address(struct usbnet *dev)
 839 {
 840         u32 addr_lo = dev->net->dev_addr[0] | dev->net->dev_addr[1] << 8 |
 841                 dev->net->dev_addr[2] << 16 | dev->net->dev_addr[3] << 24;
 842         u32 addr_hi = dev->net->dev_addr[4] | dev->net->dev_addr[5] << 8;
 843         int ret;
 844
 845         ret = smsc95xx_write_reg(dev, ADDRL, addr_lo);
 846         if (ret < 0)
 847                 return ret;
 848
 849         return smsc95xx_write_reg(dev, ADDRH, addr_hi);
 850 }
 851
 852 /* starts the TX path */
 853 static int smsc95xx_start_tx_path(struct usbnet *dev)
 854 {
 855         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
 856         unsigned long flags;
 857         int ret;
 858
 859         /* Enable Tx at MAC */
 860         spin_lock_irqsave(&pdata->mac_cr_lock, flags);
 861         pdata->mac_cr |= MAC_CR_TXEN_;
 862         spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
 863
 864         ret = smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr);
 865         if (ret < 0)
 866                 return ret;
 867
 868         /* Enable Tx at SCSRs */
 869         return smsc95xx_write_reg(dev, TX_CFG, TX_CFG_ON_);
 870 }
 871
 872 /* Starts the Receive path */
 873 static int smsc95xx_start_rx_path(struct usbnet *dev, int in_pm)
 874 {
 875         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
 876         unsigned long flags;
 877
 878         spin_lock_irqsave(&pdata->mac_cr_lock, flags);
 879         pdata->mac_cr |= MAC_CR_RXEN_;
 880         spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
 881
 882         return __smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr, in_pm);
 883 }
 884
 885 static int smsc95xx_phy_initialize(struct usbnet *dev)
 886 {
 887         int bmcr, ret, timeout = 0;
 888
 889         /* Initialize MII structure */
 890         dev->mii.dev = dev->net;
 891         dev->mii.mdio_read = smsc95xx_mdio_read;
 892         dev->mii.mdio_write = smsc95xx_mdio_write;
 893         dev->mii.phy_id_mask = 0x1f;
 894         dev->mii.reg_num_mask = 0x1f;
 895         dev->mii.phy_id = SMSC95XX_INTERNAL_PHY_ID;
 896
 897         /* reset phy and wait for reset to complete */
 898         smsc95xx_mdio_write(dev->net, dev->mii.phy_id, MII_BMCR, BMCR_RESET);
 899
 900         do {
 901                 msleep(10);
 902                 bmcr = smsc95xx_mdio_read(dev->net, dev->mii.phy_id, MII_BMCR);
 903                 timeout++;
 904         } while ((bmcr & BMCR_RESET) && (timeout < 100));
 905
 906         if (timeout >= 100) {
 907                 netdev_warn(dev->net, "timeout on PHY Reset");
 908                 return -EIO;
 909         }
 910
 911         smsc95xx_mdio_write(dev->net, dev->mii.phy_id, MII_ADVERTISE,
 912                 ADVERTISE_ALL | ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP |
 913                 ADVERTISE_PAUSE_ASYM);
 914
 915         /* read to clear */
 916         ret = smsc95xx_mdio_read(dev->net, dev->mii.phy_id, PHY_INT_SRC);
 917         if (ret < 0) {
 918                 netdev_warn(dev->net, "Failed to read PHY_INT_SRC during init\n");
 919                 return ret;
 920         }
 921
 922         smsc95xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_MASK,
 923                 PHY_INT_MASK_DEFAULT_);
 924         mii_nway_restart(&dev->mii);
 925
 926         netif_dbg(dev, ifup, dev->net, "phy initialised successfully\n");
 927         return 0;
 928 }
 929
 930 static int smsc95xx_reset(struct usbnet *dev)
 931 {
 932         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
 933         u32 read_buf, write_buf, burst_cap;
 934         int ret = 0, timeout;
 935
 936         netif_dbg(dev, ifup, dev->net, "entering smsc95xx_reset\n");
 937
 938         ret = smsc95xx_write_reg(dev, HW_CFG, HW_CFG_LRST_);
 939         if (ret < 0)
 940                 return ret;
 941
 942         timeout = 0;
 943         do {
 944                 msleep(10);
 945                 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
 946                 if (ret < 0)
 947                         return ret;
 948                 timeout++;
 949         } while ((read_buf & HW_CFG_LRST_) && (timeout < 100));
 950
 951         if (timeout >= 100) {
 952                 netdev_warn(dev->net, "timeout waiting for completion of Lite Reset\n");
 953                 return ret;
 954         }
 955
 956         ret = smsc95xx_write_reg(dev, PM_CTRL, PM_CTL_PHY_RST_);
 957         if (ret < 0)
 958                 return ret;
 959
 960         timeout = 0;
 961         do {
 962                 msleep(10);
 963                 ret = smsc95xx_read_reg(dev, PM_CTRL, &read_buf);
 964                 if (ret < 0)
 965                         return ret;
 966                 timeout++;
 967         } while ((read_buf & PM_CTL_PHY_RST_) && (timeout < 100));
 968
 969         if (timeout >= 100) {
 970                 netdev_warn(dev->net, "timeout waiting for PHY Reset\n");
 971                 return ret;
 972         }
 973
 974         ret = smsc95xx_set_mac_address(dev);
 975         if (ret < 0)
 976                 return ret;
 977
 978         netif_dbg(dev, ifup, dev->net, "MAC Address: %pM\n",
 979                   dev->net->dev_addr);
 980
 981         ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
 982         if (ret < 0)
 983                 return ret;
 984
 985         netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG : 0x%08x\n",
 986                   read_buf);
 987
 988         read_buf |= HW_CFG_BIR_;
 989
 990         ret = smsc95xx_write_reg(dev, HW_CFG, read_buf);
 991         if (ret < 0)
 992                 return ret;
 993
 994         ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
 995         if (ret < 0)
 996                 return ret;
 997
 998         netif_dbg(dev, ifup, dev->net,
 999                   "Read Value from HW_CFG after writing HW_CFG_BIR_: 0x%08x\n",
1000                   read_buf);
1001
1002         if (!turbo_mode) {
1003                 burst_cap = 0;
1004                 dev->rx_urb_size = MAX_SINGLE_PACKET_SIZE;
1005         } else if (dev->udev->speed == USB_SPEED_HIGH) {
1006                 burst_cap = DEFAULT_HS_BURST_CAP_SIZE / HS_USB_PKT_SIZE;
1007                 dev->rx_urb_size = DEFAULT_HS_BURST_CAP_SIZE;
1008         } else {
1009                 burst_cap = DEFAULT_FS_BURST_CAP_SIZE / FS_USB_PKT_SIZE;
1010                 dev->rx_urb_size = DEFAULT_FS_BURST_CAP_SIZE;
1011         }
1012
1013         netif_dbg(dev, ifup, dev->net, "rx_urb_size=%ld\n",
1014                   (ulong)dev->rx_urb_size);
1015
1016         ret = smsc95xx_write_reg(dev, BURST_CAP, burst_cap);
1017         if (ret < 0)
1018                 return ret;
1019
1020         ret = smsc95xx_read_reg(dev, BURST_CAP, &read_buf);
1021         if (ret < 0)
1022                 return ret;
1023
1024         netif_dbg(dev, ifup, dev->net,
1025                   "Read Value from BURST_CAP after writing: 0x%08x\n",
1026                   read_buf);
1027
1028         ret = smsc95xx_write_reg(dev, BULK_IN_DLY, DEFAULT_BULK_IN_DELAY);
1029         if (ret < 0)
1030                 return ret;
1031
1032         ret = smsc95xx_read_reg(dev, BULK_IN_DLY, &read_buf);
1033         if (ret < 0)
1034                 return ret;
1035
1036         netif_dbg(dev, ifup, dev->net,
1037                   "Read Value from BULK_IN_DLY after writing: 0x%08x\n",
1038                   read_buf);
1039
1040         ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
1041         if (ret < 0)
1042                 return ret;
1043
1044         netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG: 0x%08x\n",
1045                   read_buf);
1046
1047         if (turbo_mode)
1048                 read_buf |= (HW_CFG_MEF_ | HW_CFG_BCE_);
1049
1050         read_buf &= ~HW_CFG_RXDOFF_;
1051
1052         /* set Rx data offset=2, Make IP header aligns on word boundary. */
1053         read_buf |= NET_IP_ALIGN << 9;
1054
1055         ret = smsc95xx_write_reg(dev, HW_CFG, read_buf);
1056         if (ret < 0)
1057                 return ret;
1058
1059         ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
1060         if (ret < 0)
1061                 return ret;
1062
1063         netif_dbg(dev, ifup, dev->net,
1064                   "Read Value from HW_CFG after writing: 0x%08x\n", read_buf);
1065
1066         ret = smsc95xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL_);
1067         if (ret < 0)
1068                 return ret;
1069
1070         ret = smsc95xx_read_reg(dev, ID_REV, &read_buf);
1071         if (ret < 0)
1072                 return ret;
1073         netif_dbg(dev, ifup, dev->net, "ID_REV = 0x%08x\n", read_buf);
1074
1075         /* Configure GPIO pins as LED outputs */
1076         write_buf = LED_GPIO_CFG_SPD_LED | LED_GPIO_CFG_LNK_LED |
1077                 LED_GPIO_CFG_FDX_LED;
1078         ret = smsc95xx_write_reg(dev, LED_GPIO_CFG, write_buf);
1079         if (ret < 0)
1080                 return ret;
1081
1082         /* Init Tx */
1083         ret = smsc95xx_write_reg(dev, FLOW, 0);
1084         if (ret < 0)
1085                 return ret;
1086
1087         ret = smsc95xx_write_reg(dev, AFC_CFG, AFC_CFG_DEFAULT);
1088         if (ret < 0)
1089                 return ret;
1090
1091         /* Don't need mac_cr_lock during initialisation */
1092         ret = smsc95xx_read_reg(dev, MAC_CR, &pdata->mac_cr);
1093         if (ret < 0)
1094                 return ret;
1095
1096         /* Init Rx */
1097         /* Set Vlan */
1098         ret = smsc95xx_write_reg(dev, VLAN1, (u32)ETH_P_8021Q);
1099         if (ret < 0)
1100                 return ret;
1101
1102         /* Enable or disable checksum offload engines */
1103         ret = smsc95xx_set_features(dev->net, dev->net->features);
1104         if (ret < 0) {
1105                 netdev_warn(dev->net, "Failed to set checksum offload features\n");
1106                 return ret;
1107         }
1108
1109         smsc95xx_set_multicast(dev->net);
1110
1111         ret = smsc95xx_phy_initialize(dev);
1112         if (ret < 0) {
1113                 netdev_warn(dev->net, "Failed to init PHY\n");
1114                 return ret;
1115         }
1116
1117         ret = smsc95xx_read_reg(dev, INT_EP_CTL, &read_buf);
1118         if (ret < 0)
1119                 return ret;
1120
1121         /* enable PHY interrupts */
1122         read_buf |= INT_EP_CTL_PHY_INT_;
1123
1124         ret = smsc95xx_write_reg(dev, INT_EP_CTL, read_buf);
1125         if (ret < 0)
1126                 return ret;
1127
1128         ret = smsc95xx_start_tx_path(dev);
1129         if (ret < 0) {
1130                 netdev_warn(dev->net, "Failed to start TX path\n");
1131                 return ret;
1132         }
1133
1134         ret = smsc95xx_start_rx_path(dev, 0);
1135         if (ret < 0) {
1136                 netdev_warn(dev->net, "Failed to start RX path\n");
1137                 return ret;
1138         }
1139
1140         netif_dbg(dev, ifup, dev->net, "smsc95xx_reset, return 0\n");
1141         return 0;
1142 }
1143
1144 static const struct net_device_ops smsc95xx_netdev_ops = {
1145         .ndo_open               = usbnet_open,
1146         .ndo_stop               = usbnet_stop,
1147         .ndo_start_xmit         = usbnet_start_xmit,
1148         .ndo_tx_timeout         = usbnet_tx_timeout,
1149         .ndo_change_mtu         = usbnet_change_mtu,
1150         .ndo_set_mac_address    = eth_mac_addr,
1151         .ndo_validate_addr      = eth_validate_addr,
1152         .ndo_do_ioctl           = smsc95xx_ioctl,
1153         .ndo_set_rx_mode        = smsc95xx_set_multicast,
1154         .ndo_set_features       = smsc95xx_set_features,
1155 };
1156
1157 static int smsc95xx_bind(struct usbnet *dev, struct usb_interface *intf)
1158 {
1159         struct smsc95xx_priv *pdata = NULL;
1160         u32 val;
1161         int ret;
1162
1163         printk(KERN_INFO SMSC_CHIPNAME " v" SMSC_DRIVER_VERSION "\n");
1164
1165         ret = usbnet_get_endpoints(dev, intf);
1166         if (ret < 0) {
1167                 netdev_warn(dev->net, "usbnet_get_endpoints failed: %d\n", ret);
1168                 return ret;
1169         }
1170
1171         dev->data[0] = (unsigned long)kzalloc(sizeof(struct smsc95xx_priv),
1172                                               GFP_KERNEL);
1173
1174         pdata = (struct smsc95xx_priv *)(dev->data[0]);
1175         if (!pdata)
1176                 return -ENOMEM;
1177
1178         spin_lock_init(&pdata->mac_cr_lock);
1179
1180         if (DEFAULT_TX_CSUM_ENABLE)
1181                 dev->net->features |= NETIF_F_HW_CSUM;
1182         if (DEFAULT_RX_CSUM_ENABLE)
1183                 dev->net->features |= NETIF_F_RXCSUM;
1184
1185         dev->net->hw_features = NETIF_F_HW_CSUM | NETIF_F_RXCSUM;
1186
1187         smsc95xx_init_mac_address(dev);
1188
1189         /* Init all registers */
1190         ret = smsc95xx_reset(dev);
1191
1192         /* detect device revision as different features may be available */
1193         ret = smsc95xx_read_reg(dev, ID_REV, &val);
1194         if (ret < 0)
1195                 return ret;
1196         val >>= 16;
1197
1198         if ((val == ID_REV_CHIP_ID_9500A_) || (val == ID_REV_CHIP_ID_9530_) ||
1199             (val == ID_REV_CHIP_ID_89530_) || (val == ID_REV_CHIP_ID_9730_))
1200                 pdata->features = (FEATURE_8_WAKEUP_FILTERS |
1201                         FEATURE_PHY_NLP_CROSSOVER |
1202                         FEATURE_REMOTE_WAKEUP);
1203         else if (val == ID_REV_CHIP_ID_9512_)
1204                 pdata->features = FEATURE_8_WAKEUP_FILTERS;
1205
1206         dev->net->netdev_ops = &smsc95xx_netdev_ops;
1207         dev->net->ethtool_ops = &smsc95xx_ethtool_ops;
1208         dev->net->flags |= IFF_MULTICAST;
1209         dev->net->hard_header_len += SMSC95XX_TX_OVERHEAD_CSUM;
1210         dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len;
1211
1212         pdata->dev = dev;
1213         INIT_DELAYED_WORK(&pdata->carrier_check, check_carrier);
1214         schedule_delayed_work(&pdata->carrier_check, CARRIER_CHECK_DELAY);
1215
1216         return 0;
1217 }
1218
1219 static void smsc95xx_unbind(struct usbnet *dev, struct usb_interface *intf)
1220 {
1221         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1222
1223         if (pdata) {
1224                 cancel_delayed_work(&pdata->carrier_check);
1225                 netif_dbg(dev, ifdown, dev->net, "free pdata\n");
1226                 kfree(pdata);
1227                 pdata = NULL;
1228                 dev->data[0] = 0;
1229         }
1230 }
1231
1232 static u32 smsc_crc(const u8 *buffer, size_t len, int filter)
1233 {
1234         u32 crc = bitrev16(crc16(0xFFFF, buffer, len));
1235         return crc << ((filter % 2) * 16);
1236 }
1237
1238 static int smsc95xx_enable_phy_wakeup_interrupts(struct usbnet *dev, u16 mask)
1239 {
1240         struct mii_if_info *mii = &dev->mii;
1241         int ret;
1242
1243         netdev_dbg(dev->net, "enabling PHY wakeup interrupts\n");
1244
1245         /* read to clear */
1246         ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_SRC);
1247         if (ret < 0)
1248                 return ret;
1249
1250         /* enable interrupt source */
1251         ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_MASK);
1252         if (ret < 0)
1253                 return ret;
1254
1255         ret |= mask;
1256
1257         smsc95xx_mdio_write_nopm(dev->net, mii->phy_id, PHY_INT_MASK, ret);
1258
1259         return 0;
1260 }
1261
1262 static int smsc95xx_link_ok_nopm(struct usbnet *dev)
1263 {
1264         struct mii_if_info *mii = &dev->mii;
1265         int ret;
1266
1267         /* first, a dummy read, needed to latch some MII phys */
1268         ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR);
1269         if (ret < 0)
1270                 return ret;
1271
1272         ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR);
1273         if (ret < 0)
1274                 return ret;
1275
1276         return !!(ret & BMSR_LSTATUS);
1277 }
1278
1279 static int smsc95xx_enter_suspend0(struct usbnet *dev)
1280 {
1281         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1282         u32 val;
1283         int ret;
1284
1285         ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1286         if (ret < 0)
1287                 return ret;
1288
1289         val &= (~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_));
1290         val |= PM_CTL_SUS_MODE_0;
1291
1292         ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1293         if (ret < 0)
1294                 return ret;
1295
1296         /* clear wol status */
1297         val &= ~PM_CTL_WUPS_;
1298         val |= PM_CTL_WUPS_WOL_;
1299
1300         /* enable energy detection */
1301         if (pdata->wolopts & WAKE_PHY)
1302                 val |= PM_CTL_WUPS_ED_;
1303
1304         ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1305         if (ret < 0)
1306                 return ret;
1307
1308         /* read back PM_CTRL */
1309         ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1310         if (ret < 0)
1311                 return ret;
1312
1313         pdata->suspend_flags |= SUSPEND_SUSPEND0;
1314
1315         return 0;
1316 }
1317
1318 static int smsc95xx_enter_suspend1(struct usbnet *dev)
1319 {
1320         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1321         struct mii_if_info *mii = &dev->mii;
1322         u32 val;
1323         int ret;
1324
1325         /* reconfigure link pulse detection timing for
1326          * compatibility with non-standard link partners
1327          */
1328         if (pdata->features & FEATURE_PHY_NLP_CROSSOVER)
1329                 smsc95xx_mdio_write_nopm(dev->net, mii->phy_id, PHY_EDPD_CONFIG,
1330                         PHY_EDPD_CONFIG_DEFAULT);
1331
1332         /* enable energy detect power-down mode */
1333         ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_MODE_CTRL_STS);
1334         if (ret < 0)
1335                 return ret;
1336
1337         ret |= MODE_CTRL_STS_EDPWRDOWN_;
1338
1339         smsc95xx_mdio_write_nopm(dev->net, mii->phy_id, PHY_MODE_CTRL_STS, ret);
1340
1341         /* enter SUSPEND1 mode */
1342         ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1343         if (ret < 0)
1344                 return ret;
1345
1346         val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_);
1347         val |= PM_CTL_SUS_MODE_1;
1348
1349         ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1350         if (ret < 0)
1351                 return ret;
1352
1353         /* clear wol status, enable energy detection */
1354         val &= ~PM_CTL_WUPS_;
1355         val |= (PM_CTL_WUPS_ED_ | PM_CTL_ED_EN_);
1356
1357         ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1358         if (ret < 0)
1359                 return ret;
1360
1361         pdata->suspend_flags |= SUSPEND_SUSPEND1;
1362
1363         return 0;
1364 }
1365
1366 static int smsc95xx_enter_suspend2(struct usbnet *dev)
1367 {
1368         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1369         u32 val;
1370         int ret;
1371
1372         ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1373         if (ret < 0)
1374                 return ret;
1375
1376         val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_);
1377         val |= PM_CTL_SUS_MODE_2;
1378
1379         ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1380         if (ret < 0)
1381                 return ret;
1382
1383         pdata->suspend_flags |= SUSPEND_SUSPEND2;
1384
1385         return 0;
1386 }
1387
1388 static int smsc95xx_enter_suspend3(struct usbnet *dev)
1389 {
1390         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1391         u32 val;
1392         int ret;
1393
1394         ret = smsc95xx_read_reg_nopm(dev, RX_FIFO_INF, &val);
1395         if (ret < 0)
1396                 return ret;
1397
1398         if (val & 0xFFFF) {
1399                 netdev_info(dev->net, "rx fifo not empty in autosuspend\n");
1400                 return -EBUSY;
1401         }
1402
1403         ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1404         if (ret < 0)
1405                 return ret;
1406
1407         val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_);
1408         val |= PM_CTL_SUS_MODE_3 | PM_CTL_RES_CLR_WKP_STS;
1409
1410         ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1411         if (ret < 0)
1412                 return ret;
1413
1414         /* clear wol status */
1415         val &= ~PM_CTL_WUPS_;
1416         val |= PM_CTL_WUPS_WOL_;
1417
1418         ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1419         if (ret < 0)
1420                 return ret;
1421
1422         pdata->suspend_flags |= SUSPEND_SUSPEND3;
1423
1424         return 0;
1425 }
1426
1427 static int smsc95xx_autosuspend(struct usbnet *dev, u32 link_up)
1428 {
1429         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1430         int ret;
1431
1432         if (!netif_running(dev->net)) {
1433                 /* interface is ifconfig down so fully power down hw */
1434                 netdev_dbg(dev->net, "autosuspend entering SUSPEND2\n");
1435                 return smsc95xx_enter_suspend2(dev);
1436         }
1437
1438         if (!link_up) {
1439                 /* link is down so enter EDPD mode, but only if device can
1440                  * reliably resume from it.  This check should be redundant
1441                  * as current FEATURE_REMOTE_WAKEUP parts also support
1442                  * FEATURE_PHY_NLP_CROSSOVER but it's included for clarity */
1443                 if (!(pdata->features & FEATURE_PHY_NLP_CROSSOVER)) {
1444                         netdev_warn(dev->net, "EDPD not supported\n");
1445                         return -EBUSY;
1446                 }
1447
1448                 netdev_dbg(dev->net, "autosuspend entering SUSPEND1\n");
1449
1450                 /* enable PHY wakeup events for if cable is attached */
1451                 ret = smsc95xx_enable_phy_wakeup_interrupts(dev,
1452                         PHY_INT_MASK_ANEG_COMP_);
1453                 if (ret < 0) {
1454                         netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1455                         return ret;
1456                 }
1457
1458                 netdev_info(dev->net, "entering SUSPEND1 mode\n");
1459                 return smsc95xx_enter_suspend1(dev);
1460         }
1461
1462         /* enable PHY wakeup events so we remote wakeup if cable is pulled */
1463         ret = smsc95xx_enable_phy_wakeup_interrupts(dev,
1464                 PHY_INT_MASK_LINK_DOWN_);
1465         if (ret < 0) {
1466                 netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1467                 return ret;
1468         }
1469
1470         netdev_dbg(dev->net, "autosuspend entering SUSPEND3\n");
1471         return smsc95xx_enter_suspend3(dev);
1472 }
1473
1474 static int smsc95xx_suspend(struct usb_interface *intf, pm_message_t message)
1475 {
1476         struct usbnet *dev = usb_get_intfdata(intf);
1477         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1478         u32 val, link_up;
1479         int ret;
1480
1481         ret = usbnet_suspend(intf, message);
1482         if (ret < 0) {
1483                 netdev_warn(dev->net, "usbnet_suspend error\n");
1484                 return ret;
1485         }
1486
1487         if (pdata->suspend_flags) {
1488                 netdev_warn(dev->net, "error during last resume\n");
1489                 pdata->suspend_flags = 0;
1490         }
1491
1492         /* determine if link is up using only _nopm functions */
1493         link_up = smsc95xx_link_ok_nopm(dev);
1494
1495         if (message.event == PM_EVENT_AUTO_SUSPEND &&
1496             (pdata->features & FEATURE_REMOTE_WAKEUP)) {
1497                 ret = smsc95xx_autosuspend(dev, link_up);
1498                 goto done;
1499         }
1500
1501         /* if we get this far we're not autosuspending */
1502         /* if no wol options set, or if link is down and we're not waking on
1503          * PHY activity, enter lowest power SUSPEND2 mode
1504          */
1505         if (!(pdata->wolopts & SUPPORTED_WAKE) ||
1506                 !(link_up || (pdata->wolopts & WAKE_PHY))) {
1507                 netdev_info(dev->net, "entering SUSPEND2 mode\n");
1508
1509                 /* disable energy detect (link up) & wake up events */
1510                 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val);
1511                 if (ret < 0)
1512                         goto done;
1513
1514                 val &= ~(WUCSR_MPEN_ | WUCSR_WAKE_EN_);
1515
1516                 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val);
1517                 if (ret < 0)
1518                         goto done;
1519
1520                 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1521                 if (ret < 0)
1522                         goto done;
1523
1524                 val &= ~(PM_CTL_ED_EN_ | PM_CTL_WOL_EN_);
1525
1526                 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1527                 if (ret < 0)
1528                         goto done;
1529
1530                 ret = smsc95xx_enter_suspend2(dev);
1531                 goto done;
1532         }
1533
1534         if (pdata->wolopts & WAKE_PHY) {
1535                 ret = smsc95xx_enable_phy_wakeup_interrupts(dev,
1536                         (PHY_INT_MASK_ANEG_COMP_ | PHY_INT_MASK_LINK_DOWN_));
1537                 if (ret < 0) {
1538                         netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1539                         goto done;
1540                 }
1541
1542                 /* if link is down then configure EDPD and enter SUSPEND1,
1543                  * otherwise enter SUSPEND0 below
1544                  */
1545                 if (!link_up) {
1546                         netdev_info(dev->net, "entering SUSPEND1 mode\n");
1547                         ret = smsc95xx_enter_suspend1(dev);
1548                         goto done;
1549                 }
1550         }
1551
1552         if (pdata->wolopts & (WAKE_BCAST | WAKE_MCAST | WAKE_ARP | WAKE_UCAST)) {
1553                 u32 *filter_mask = kzalloc(sizeof(u32) * 32, GFP_KERNEL);
1554                 u32 command[2];
1555                 u32 offset[2];
1556                 u32 crc[4];
1557                 int wuff_filter_count =
1558                         (pdata->features & FEATURE_8_WAKEUP_FILTERS) ?
1559                         LAN9500A_WUFF_NUM : LAN9500_WUFF_NUM;
1560                 int i, filter = 0;
1561
1562                 if (!filter_mask) {
1563                         netdev_warn(dev->net, "Unable to allocate filter_mask\n");
1564                         ret = -ENOMEM;
1565                         goto done;
1566                 }
1567
1568                 memset(command, 0, sizeof(command));
1569                 memset(offset, 0, sizeof(offset));
1570                 memset(crc, 0, sizeof(crc));
1571
1572                 if (pdata->wolopts & WAKE_BCAST) {
1573                         const u8 bcast[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
1574                         netdev_info(dev->net, "enabling broadcast detection\n");
1575                         filter_mask[filter * 4] = 0x003F;
1576                         filter_mask[filter * 4 + 1] = 0x00;
1577                         filter_mask[filter * 4 + 2] = 0x00;
1578                         filter_mask[filter * 4 + 3] = 0x00;
1579                         command[filter/4] |= 0x05UL << ((filter % 4) * 8);
1580                         offset[filter/4] |= 0x00 << ((filter % 4) * 8);
1581                         crc[filter/2] |= smsc_crc(bcast, 6, filter);
1582                         filter++;
1583                 }
1584
1585                 if (pdata->wolopts & WAKE_MCAST) {
1586                         const u8 mcast[] = {0x01, 0x00, 0x5E};
1587                         netdev_info(dev->net, "enabling multicast detection\n");
1588                         filter_mask[filter * 4] = 0x0007;
1589                         filter_mask[filter * 4 + 1] = 0x00;
1590                         filter_mask[filter * 4 + 2] = 0x00;
1591                         filter_mask[filter * 4 + 3] = 0x00;
1592                         command[filter/4] |= 0x09UL << ((filter % 4) * 8);
1593                         offset[filter/4] |= 0x00  << ((filter % 4) * 8);
1594                         crc[filter/2] |= smsc_crc(mcast, 3, filter);
1595                         filter++;
1596                 }
1597
1598                 if (pdata->wolopts & WAKE_ARP) {
1599                         const u8 arp[] = {0x08, 0x06};
1600                         netdev_info(dev->net, "enabling ARP detection\n");
1601                         filter_mask[filter * 4] = 0x0003;
1602                         filter_mask[filter * 4 + 1] = 0x00;
1603                         filter_mask[filter * 4 + 2] = 0x00;
1604                         filter_mask[filter * 4 + 3] = 0x00;
1605                         command[filter/4] |= 0x05UL << ((filter % 4) * 8);
1606                         offset[filter/4] |= 0x0C << ((filter % 4) * 8);
1607                         crc[filter/2] |= smsc_crc(arp, 2, filter);
1608                         filter++;
1609                 }
1610
1611                 if (pdata->wolopts & WAKE_UCAST) {
1612                         netdev_info(dev->net, "enabling unicast detection\n");
1613                         filter_mask[filter * 4] = 0x003F;
1614                         filter_mask[filter * 4 + 1] = 0x00;
1615                         filter_mask[filter * 4 + 2] = 0x00;
1616                         filter_mask[filter * 4 + 3] = 0x00;
1617                         command[filter/4] |= 0x01UL << ((filter % 4) * 8);
1618                         offset[filter/4] |= 0x00 << ((filter % 4) * 8);
1619                         crc[filter/2] |= smsc_crc(dev->net->dev_addr, ETH_ALEN, filter);
1620                         filter++;
1621                 }
1622
1623                 for (i = 0; i < (wuff_filter_count * 4); i++) {
1624                         ret = smsc95xx_write_reg_nopm(dev, WUFF, filter_mask[i]);
1625                         if (ret < 0) {
1626                                 kfree(filter_mask);
1627                                 goto done;
1628                         }
1629                 }
1630                 kfree(filter_mask);
1631
1632                 for (i = 0; i < (wuff_filter_count / 4); i++) {
1633                         ret = smsc95xx_write_reg_nopm(dev, WUFF, command[i]);
1634                         if (ret < 0)
1635                                 goto done;
1636                 }
1637
1638                 for (i = 0; i < (wuff_filter_count / 4); i++) {
1639                         ret = smsc95xx_write_reg_nopm(dev, WUFF, offset[i]);
1640                         if (ret < 0)
1641                                 goto done;
1642                 }
1643
1644                 for (i = 0; i < (wuff_filter_count / 2); i++) {
1645                         ret = smsc95xx_write_reg_nopm(dev, WUFF, crc[i]);
1646                         if (ret < 0)
1647                                 goto done;
1648                 }
1649
1650                 /* clear any pending pattern match packet status */
1651                 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val);
1652                 if (ret < 0)
1653                         goto done;
1654
1655                 val |= WUCSR_WUFR_;
1656
1657                 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val);
1658                 if (ret < 0)
1659                         goto done;
1660         }
1661
1662         if (pdata->wolopts & WAKE_MAGIC) {
1663                 /* clear any pending magic packet status */
1664                 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val);
1665                 if (ret < 0)
1666                         goto done;
1667
1668                 val |= WUCSR_MPR_;
1669
1670                 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val);
1671                 if (ret < 0)
1672                         goto done;
1673         }
1674
1675         /* enable/disable wakeup sources */
1676         ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val);
1677         if (ret < 0)
1678                 goto done;
1679
1680         if (pdata->wolopts & (WAKE_BCAST | WAKE_MCAST | WAKE_ARP | WAKE_UCAST)) {
1681                 netdev_info(dev->net, "enabling pattern match wakeup\n");
1682                 val |= WUCSR_WAKE_EN_;
1683         } else {
1684                 netdev_info(dev->net, "disabling pattern match wakeup\n");
1685                 val &= ~WUCSR_WAKE_EN_;
1686         }
1687
1688         if (pdata->wolopts & WAKE_MAGIC) {
1689                 netdev_info(dev->net, "enabling magic packet wakeup\n");
1690                 val |= WUCSR_MPEN_;
1691         } else {
1692                 netdev_info(dev->net, "disabling magic packet wakeup\n");
1693                 val &= ~WUCSR_MPEN_;
1694         }
1695
1696         ret = smsc95xx_write_reg_nopm(dev, WUCSR, val);
1697         if (ret < 0)
1698                 goto done;
1699
1700         /* enable wol wakeup source */
1701         ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1702         if (ret < 0)
1703                 goto done;
1704
1705         val |= PM_CTL_WOL_EN_;
1706
1707         /* phy energy detect wakeup source */
1708         if (pdata->wolopts & WAKE_PHY)
1709                 val |= PM_CTL_ED_EN_;
1710
1711         ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1712         if (ret < 0)
1713                 goto done;
1714
1715         /* enable receiver to enable frame reception */
1716         smsc95xx_start_rx_path(dev, 1);
1717
1718         /* some wol options are enabled, so enter SUSPEND0 */
1719         netdev_info(dev->net, "entering SUSPEND0 mode\n");
1720         ret = smsc95xx_enter_suspend0(dev);
1721
1722 done:
1723         /*
1724          * TODO: resume() might need to handle the suspend failure
1725          * in system sleep
1726          */
1727         if (ret && PMSG_IS_AUTO(message))
1728                 usbnet_resume(intf);
1729         return ret;
1730 }
1731
1732 static int smsc95xx_resume(struct usb_interface *intf)
1733 {
1734         struct usbnet *dev = usb_get_intfdata(intf);
1735         struct smsc95xx_priv *pdata;
1736         u8 suspend_flags;
1737         int ret;
1738         u32 val;
1739
1740         BUG_ON(!dev);
1741         pdata = (struct smsc95xx_priv *)(dev->data[0]);
1742         suspend_flags = pdata->suspend_flags;
1743
1744         netdev_dbg(dev->net, "resume suspend_flags=0x%02x\n", suspend_flags);
1745
1746         /* do this first to ensure it's cleared even in error case */
1747         pdata->suspend_flags = 0;
1748         schedule_delayed_work(&pdata->carrier_check, CARRIER_CHECK_DELAY);
1749
1750         if (suspend_flags & SUSPEND_ALLMODES) {
1751                 /* clear wake-up sources */
1752                 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val);
1753                 if (ret < 0)
1754                         return ret;
1755
1756                 val &= ~(WUCSR_WAKE_EN_ | WUCSR_MPEN_);
1757
1758                 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val);
1759                 if (ret < 0)
1760                         return ret;
1761
1762                 /* clear wake-up status */
1763                 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1764                 if (ret < 0)
1765                         return ret;
1766
1767                 val &= ~PM_CTL_WOL_EN_;
1768                 val |= PM_CTL_WUPS_;
1769
1770                 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1771                 if (ret < 0)
1772                         return ret;
1773         }
1774
1775         ret = usbnet_resume(intf);
1776         if (ret < 0)
1777                 netdev_warn(dev->net, "usbnet_resume error\n");
1778
1779         return ret;
1780 }
1781
1782 static int smsc95xx_reset_resume(struct usb_interface *intf)
1783 {
1784         struct usbnet *dev = usb_get_intfdata(intf);
1785         int ret;
1786
1787         ret = smsc95xx_reset(dev);
1788         if (ret < 0)
1789                 return ret;
1790
1791         return smsc95xx_resume(intf);
1792 }
1793
1794 static void smsc95xx_rx_csum_offload(struct sk_buff *skb)
1795 {
1796         skb->csum = *(u16 *)(skb_tail_pointer(skb) - 2);
1797         skb->ip_summed = CHECKSUM_COMPLETE;
1798         skb_trim(skb, skb->len - 2);
1799 }
1800
1801 static int smsc95xx_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
1802 {
1803         /* This check is no longer done by usbnet */
1804         if (skb->len < dev->net->hard_header_len)
1805                 return 0;
1806
1807         while (skb->len > 0) {
1808                 u32 header, align_count;
1809                 struct sk_buff *ax_skb;
1810                 unsigned char *packet;
1811                 u16 size;
1812
1813                 memcpy(&header, skb->data, sizeof(header));
1814                 le32_to_cpus(&header);
1815                 skb_pull(skb, 4 + NET_IP_ALIGN);
1816                 packet = skb->data;
1817
1818                 /* get the packet length */
1819                 size = (u16)((header & RX_STS_FL_) >> 16);
1820                 align_count = (4 - ((size + NET_IP_ALIGN) % 4)) % 4;
1821
1822                 if (unlikely(header & RX_STS_ES_)) {
1823                         netif_dbg(dev, rx_err, dev->net,
1824                                   "Error header=0x%08x\n", header);
1825                         dev->net->stats.rx_errors++;
1826                         dev->net->stats.rx_dropped++;
1827
1828                         if (header & RX_STS_CRC_) {
1829                                 dev->net->stats.rx_crc_errors++;
1830                         } else {
1831                                 if (header & (RX_STS_TL_ | RX_STS_RF_))
1832                                         dev->net->stats.rx_frame_errors++;
1833
1834                                 if ((header & RX_STS_LE_) &&
1835                                         (!(header & RX_STS_FT_)))
1836                                         dev->net->stats.rx_length_errors++;
1837                         }
1838                 } else {
1839                         /* ETH_FRAME_LEN + 4(CRC) + 2(COE) + 4(Vlan) */
1840                         if (unlikely(size > (ETH_FRAME_LEN + 12))) {
1841                                 netif_dbg(dev, rx_err, dev->net,
1842                                           "size err header=0x%08x\n", header);
1843                                 return 0;
1844                         }
1845
1846                         /* last frame in this batch */
1847                         if (skb->len == size) {
1848                                 if (dev->net->features & NETIF_F_RXCSUM)
1849                                         smsc95xx_rx_csum_offload(skb);
1850                                 skb_trim(skb, skb->len - 4); /* remove fcs */
1851                                 skb->truesize = size + sizeof(struct sk_buff);
1852
1853                                 return 1;
1854                         }
1855
1856                         ax_skb = skb_clone(skb, GFP_ATOMIC);
1857                         if (unlikely(!ax_skb)) {
1858                                 netdev_warn(dev->net, "Error allocating skb\n");
1859                                 return 0;
1860                         }
1861
1862                         ax_skb->len = size;
1863                         ax_skb->data = packet;
1864                         skb_set_tail_pointer(ax_skb, size);
1865
1866                         if (dev->net->features & NETIF_F_RXCSUM)
1867                                 smsc95xx_rx_csum_offload(ax_skb);
1868                         skb_trim(ax_skb, ax_skb->len - 4); /* remove fcs */
1869                         ax_skb->truesize = size + sizeof(struct sk_buff);
1870
1871                         usbnet_skb_return(dev, ax_skb);
1872                 }
1873
1874                 skb_pull(skb, size);
1875
1876                 /* padding bytes before the next frame starts */
1877                 if (skb->len)
1878                         skb_pull(skb, align_count);
1879         }
1880
1881         return 1;
1882 }
1883
1884 static u32 smsc95xx_calc_csum_preamble(struct sk_buff *skb)
1885 {
1886         u16 low_16 = (u16)skb_checksum_start_offset(skb);
1887         u16 high_16 = low_16 + skb->csum_offset;
1888         return (high_16 << 16) | low_16;
1889 }
1890
1891 static struct sk_buff *smsc95xx_tx_fixup(struct usbnet *dev,
1892                                          struct sk_buff *skb, gfp_t flags)
1893 {
1894         bool csum = skb->ip_summed == CHECKSUM_PARTIAL;
1895         int overhead = csum ? SMSC95XX_TX_OVERHEAD_CSUM : SMSC95XX_TX_OVERHEAD;
1896         u32 tx_cmd_a, tx_cmd_b;
1897
1898         /* We do not advertise SG, so skbs should be already linearized */
1899         BUG_ON(skb_shinfo(skb)->nr_frags);
1900
1901         if (skb_headroom(skb) < overhead) {
1902                 struct sk_buff *skb2 = skb_copy_expand(skb,
1903                         overhead, 0, flags);
1904                 dev_kfree_skb_any(skb);
1905                 skb = skb2;
1906                 if (!skb)
1907                         return NULL;
1908         }
1909
1910         if (csum) {
1911                 if (skb->len <= 45) {
1912                         /* workaround - hardware tx checksum does not work
1913                          * properly with extremely small packets */
1914                         long csstart = skb_checksum_start_offset(skb);
1915                         __wsum calc = csum_partial(skb->data + csstart,
1916                                 skb->len - csstart, 0);
1917                         *((__sum16 *)(skb->data + csstart
1918                                 + skb->csum_offset)) = csum_fold(calc);
1919
1920                         csum = false;
1921                 } else {
1922                         u32 csum_preamble = smsc95xx_calc_csum_preamble(skb);
1923                         skb_push(skb, 4);
1924                         cpu_to_le32s(&csum_preamble);
1925                         memcpy(skb->data, &csum_preamble, 4);
1926                 }
1927         }
1928
1929         skb_push(skb, 4);
1930         tx_cmd_b = (u32)(skb->len - 4);
1931         if (csum)
1932                 tx_cmd_b |= TX_CMD_B_CSUM_ENABLE;
1933         cpu_to_le32s(&tx_cmd_b);
1934         memcpy(skb->data, &tx_cmd_b, 4);
1935
1936         skb_push(skb, 4);
1937         tx_cmd_a = (u32)(skb->len - 8) | TX_CMD_A_FIRST_SEG_ |
1938                 TX_CMD_A_LAST_SEG_;
1939         cpu_to_le32s(&tx_cmd_a);
1940         memcpy(skb->data, &tx_cmd_a, 4);
1941
1942         return skb;
1943 }
1944
1945 static int smsc95xx_manage_power(struct usbnet *dev, int on)
1946 {
1947         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1948
1949         dev->intf->needs_remote_wakeup = on;
1950
1951         if (pdata->features & FEATURE_REMOTE_WAKEUP)
1952                 return 0;
1953
1954         /* this chip revision isn't capable of remote wakeup */
1955         netdev_info(dev->net, "hardware isn't capable of remote wakeup\n");
1956
1957         if (on)
1958                 usb_autopm_get_interface_no_resume(dev->intf);
1959         else
1960                 usb_autopm_put_interface(dev->intf);
1961
1962         return 0;
1963 }
1964
1965 static const struct driver_info smsc95xx_info = {
1966         .description    = "smsc95xx USB 2.0 Ethernet",
1967         .bind           = smsc95xx_bind,
1968         .unbind         = smsc95xx_unbind,
1969         .link_reset     = smsc95xx_link_reset,
1970         .reset          = smsc95xx_reset,
1971         .rx_fixup       = smsc95xx_rx_fixup,
1972         .tx_fixup       = smsc95xx_tx_fixup,
1973         .status         = smsc95xx_status,
1974         .manage_power   = smsc95xx_manage_power,
1975         .flags          = FLAG_ETHER | FLAG_SEND_ZLP | FLAG_LINK_INTR,
1976 };
1977
1978 static const struct usb_device_id products[] = {
1979         {
1980                 /* SMSC9500 USB Ethernet Device */
1981                 USB_DEVICE(0x0424, 0x9500),
1982                 .driver_info = (unsigned long) &smsc95xx_info,
1983         },
1984         {
1985                 /* SMSC9505 USB Ethernet Device */
1986                 USB_DEVICE(0x0424, 0x9505),
1987                 .driver_info = (unsigned long) &smsc95xx_info,
1988         },
1989         {
1990                 /* SMSC9500A USB Ethernet Device */
1991                 USB_DEVICE(0x0424, 0x9E00),
1992                 .driver_info = (unsigned long) &smsc95xx_info,
1993         },
1994         {
1995                 /* SMSC9505A USB Ethernet Device */
1996                 USB_DEVICE(0x0424, 0x9E01),
1997                 .driver_info = (unsigned long) &smsc95xx_info,
1998         },
1999         {
2000                 /* SMSC9512/9514 USB Hub & Ethernet Device */
2001                 USB_DEVICE(0x0424, 0xec00),
2002                 .driver_info = (unsigned long) &smsc95xx_info,
2003         },
2004         {
2005                 /* SMSC9500 USB Ethernet Device (SAL10) */
2006                 USB_DEVICE(0x0424, 0x9900),
2007                 .driver_info = (unsigned long) &smsc95xx_info,
2008         },
2009         {
2010                 /* SMSC9505 USB Ethernet Device (SAL10) */
2011                 USB_DEVICE(0x0424, 0x9901),
2012                 .driver_info = (unsigned long) &smsc95xx_info,
2013         },
2014         {
2015                 /* SMSC9500A USB Ethernet Device (SAL10) */
2016                 USB_DEVICE(0x0424, 0x9902),
2017                 .driver_info = (unsigned long) &smsc95xx_info,
2018         },
2019         {
2020                 /* SMSC9505A USB Ethernet Device (SAL10) */
2021                 USB_DEVICE(0x0424, 0x9903),
2022                 .driver_info = (unsigned long) &smsc95xx_info,
2023         },
2024         {
2025                 /* SMSC9512/9514 USB Hub & Ethernet Device (SAL10) */
2026                 USB_DEVICE(0x0424, 0x9904),
2027                 .driver_info = (unsigned long) &smsc95xx_info,
2028         },
2029         {
2030                 /* SMSC9500A USB Ethernet Device (HAL) */
2031                 USB_DEVICE(0x0424, 0x9905),
2032                 .driver_info = (unsigned long) &smsc95xx_info,
2033         },
2034         {
2035                 /* SMSC9505A USB Ethernet Device (HAL) */
2036                 USB_DEVICE(0x0424, 0x9906),
2037                 .driver_info = (unsigned long) &smsc95xx_info,
2038         },
2039         {
2040                 /* SMSC9500 USB Ethernet Device (Alternate ID) */
2041                 USB_DEVICE(0x0424, 0x9907),
2042                 .driver_info = (unsigned long) &smsc95xx_info,
2043         },
2044         {
2045                 /* SMSC9500A USB Ethernet Device (Alternate ID) */
2046                 USB_DEVICE(0x0424, 0x9908),
2047                 .driver_info = (unsigned long) &smsc95xx_info,
2048         },
2049         {
2050                 /* SMSC9512/9514 USB Hub & Ethernet Device (Alternate ID) */
2051                 USB_DEVICE(0x0424, 0x9909),
2052                 .driver_info = (unsigned long) &smsc95xx_info,
2053         },
2054         {
2055                 /* SMSC LAN9530 USB Ethernet Device */
2056                 USB_DEVICE(0x0424, 0x9530),
2057                 .driver_info = (unsigned long) &smsc95xx_info,
2058         },
2059         {
2060                 /* SMSC LAN9730 USB Ethernet Device */
2061                 USB_DEVICE(0x0424, 0x9730),
2062                 .driver_info = (unsigned long) &smsc95xx_info,
2063         },
2064         {
2065                 /* SMSC LAN89530 USB Ethernet Device */
2066                 USB_DEVICE(0x0424, 0x9E08),
2067                 .driver_info = (unsigned long) &smsc95xx_info,
2068         },
2069         { },            /* END */
2070 };
2071 MODULE_DEVICE_TABLE(usb, products);
2072
2073 static struct usb_driver smsc95xx_driver = {
2074         .name           = "smsc95xx",
2075         .id_table       = products,
2076         .probe          = usbnet_probe,
2077         .suspend        = smsc95xx_suspend,
2078         .resume         = smsc95xx_resume,
2079         .reset_resume   = smsc95xx_reset_resume,
2080         .disconnect     = usbnet_disconnect,
2081         .disable_hub_initiated_lpm = 1,
2082         .supports_autosuspend = 1,
2083 };
2084
2085 module_usb_driver(smsc95xx_driver);
2086
2087 MODULE_AUTHOR("Nancy Lin");
2088 MODULE_AUTHOR("Steve Glendinning <steve.glendinning@shawell.net>");
2089 MODULE_DESCRIPTION("SMSC95XX USB 2.0 Ethernet Devices");
2090 MODULE_LICENSE("GPL");