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             "1.0.6"
  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 chip_id;
  68         u32 mac_cr;
  69         u32 hash_hi;
  70         u32 hash_lo;
  71         u32 wolopts;
  72         spinlock_t mac_cr_lock;
  73         u8 features;
  74         u8 suspend_flags;
  75         u8 mdix_ctrl;
  76         bool link_ok;
  77         struct delayed_work carrier_check;
  78         struct usbnet *dev;
  79 };
  80
  81 static bool turbo_mode = true;
  82 module_param(turbo_mode, bool, 0644);
  83 MODULE_PARM_DESC(turbo_mode, "Enable multiple frames per Rx transaction");
  84
  85 static int __must_check __smsc95xx_read_reg(struct usbnet *dev, u32 index,
  86                                             u32 *data, int in_pm)
  87 {
  88         u32 buf;
  89         int ret;
  90         int (*fn)(struct usbnet *, u8, u8, u16, u16, void *, u16);
  91
  92         BUG_ON(!dev);
  93
  94         if (!in_pm)
  95                 fn = usbnet_read_cmd;
  96         else
  97                 fn = usbnet_read_cmd_nopm;
  98
  99         ret = fn(dev, USB_VENDOR_REQUEST_READ_REGISTER, USB_DIR_IN
 100                  | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 101                  0, index, &buf, 4);
 102         if (unlikely(ret < 0)) {
 103                 netdev_warn(dev->net, "Failed to read reg index 0x%08x: %d\n",
 104                             index, ret);
 105                 return ret;
 106         }
 107
 108         le32_to_cpus(&buf);
 109         *data = buf;
 110
 111         return ret;
 112 }
 113
 114 static int __must_check __smsc95xx_write_reg(struct usbnet *dev, u32 index,
 115                                              u32 data, int in_pm)
 116 {
 117         u32 buf;
 118         int ret;
 119         int (*fn)(struct usbnet *, u8, u8, u16, u16, const void *, u16);
 120
 121         BUG_ON(!dev);
 122
 123         if (!in_pm)
 124                 fn = usbnet_write_cmd;
 125         else
 126                 fn = usbnet_write_cmd_nopm;
 127
 128         buf = data;
 129         cpu_to_le32s(&buf);
 130
 131         ret = fn(dev, USB_VENDOR_REQUEST_WRITE_REGISTER, USB_DIR_OUT
 132                  | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 133                  0, index, &buf, 4);
 134         if (unlikely(ret < 0))
 135                 netdev_warn(dev->net, "Failed to write reg index 0x%08x: %d\n",
 136                             index, ret);
 137
 138         return ret;
 139 }
 140
 141 static int __must_check smsc95xx_read_reg_nopm(struct usbnet *dev, u32 index,
 142                                                u32 *data)
 143 {
 144         return __smsc95xx_read_reg(dev, index, data, 1);
 145 }
 146
 147 static int __must_check smsc95xx_write_reg_nopm(struct usbnet *dev, u32 index,
 148                                                 u32 data)
 149 {
 150         return __smsc95xx_write_reg(dev, index, data, 1);
 151 }
 152
 153 static int __must_check smsc95xx_read_reg(struct usbnet *dev, u32 index,
 154                                           u32 *data)
 155 {
 156         return __smsc95xx_read_reg(dev, index, data, 0);
 157 }
 158
 159 static int __must_check smsc95xx_write_reg(struct usbnet *dev, u32 index,
 160                                            u32 data)
 161 {
 162         return __smsc95xx_write_reg(dev, index, data, 0);
 163 }
 164
 165 /* Loop until the read is completed with timeout
 166  * called with phy_mutex held */
 167 static int __must_check __smsc95xx_phy_wait_not_busy(struct usbnet *dev,
 168                                                      int in_pm)
 169 {
 170         unsigned long start_time = jiffies;
 171         u32 val;
 172         int ret;
 173
 174         do {
 175                 ret = __smsc95xx_read_reg(dev, MII_ADDR, &val, in_pm);
 176                 if (ret < 0) {
 177                         netdev_warn(dev->net, "Error reading MII_ACCESS\n");
 178                         return ret;
 179                 }
 180
 181                 if (!(val & MII_BUSY_))
 182                         return 0;
 183         } while (!time_after(jiffies, start_time + HZ));
 184
 185         return -EIO;
 186 }
 187
 188 static int __smsc95xx_mdio_read(struct net_device *netdev, int phy_id, int idx,
 189                                 int in_pm)
 190 {
 191         struct usbnet *dev = netdev_priv(netdev);
 192         u32 val, addr;
 193         int ret;
 194
 195         mutex_lock(&dev->phy_mutex);
 196
 197         /* confirm MII not busy */
 198         ret = __smsc95xx_phy_wait_not_busy(dev, in_pm);
 199         if (ret < 0) {
 200                 netdev_warn(dev->net, "MII is busy in smsc95xx_mdio_read\n");
 201                 goto done;
 202         }
 203
 204         /* set the address, index & direction (read from PHY) */
 205         phy_id &= dev->mii.phy_id_mask;
 206         idx &= dev->mii.reg_num_mask;
 207         addr = (phy_id << 11) | (idx << 6) | MII_READ_ | MII_BUSY_;
 208         ret = __smsc95xx_write_reg(dev, MII_ADDR, addr, in_pm);
 209         if (ret < 0) {
 210                 netdev_warn(dev->net, "Error writing MII_ADDR\n");
 211                 goto done;
 212         }
 213
 214         ret = __smsc95xx_phy_wait_not_busy(dev, in_pm);
 215         if (ret < 0) {
 216                 netdev_warn(dev->net, "Timed out reading MII reg %02X\n", idx);
 217                 goto done;
 218         }
 219
 220         ret = __smsc95xx_read_reg(dev, MII_DATA, &val, in_pm);
 221         if (ret < 0) {
 222                 netdev_warn(dev->net, "Error reading MII_DATA\n");
 223                 goto done;
 224         }
 225
 226         ret = (u16)(val & 0xFFFF);
 227
 228 done:
 229         mutex_unlock(&dev->phy_mutex);
 230         return ret;
 231 }
 232
 233 static void __smsc95xx_mdio_write(struct net_device *netdev, int phy_id,
 234                                   int idx, int regval, int in_pm)
 235 {
 236         struct usbnet *dev = netdev_priv(netdev);
 237         u32 val, addr;
 238         int ret;
 239
 240         mutex_lock(&dev->phy_mutex);
 241
 242         /* confirm MII not busy */
 243         ret = __smsc95xx_phy_wait_not_busy(dev, in_pm);
 244         if (ret < 0) {
 245                 netdev_warn(dev->net, "MII is busy in smsc95xx_mdio_write\n");
 246                 goto done;
 247         }
 248
 249         val = regval;
 250         ret = __smsc95xx_write_reg(dev, MII_DATA, val, in_pm);
 251         if (ret < 0) {
 252                 netdev_warn(dev->net, "Error writing MII_DATA\n");
 253                 goto done;
 254         }
 255
 256         /* set the address, index & direction (write to PHY) */
 257         phy_id &= dev->mii.phy_id_mask;
 258         idx &= dev->mii.reg_num_mask;
 259         addr = (phy_id << 11) | (idx << 6) | MII_WRITE_ | MII_BUSY_;
 260         ret = __smsc95xx_write_reg(dev, MII_ADDR, addr, in_pm);
 261         if (ret < 0) {
 262                 netdev_warn(dev->net, "Error writing MII_ADDR\n");
 263                 goto done;
 264         }
 265
 266         ret = __smsc95xx_phy_wait_not_busy(dev, in_pm);
 267         if (ret < 0) {
 268                 netdev_warn(dev->net, "Timed out writing MII reg %02X\n", idx);
 269                 goto done;
 270         }
 271
 272 done:
 273         mutex_unlock(&dev->phy_mutex);
 274 }
 275
 276 static int smsc95xx_mdio_read_nopm(struct net_device *netdev, int phy_id,
 277                                    int idx)
 278 {
 279         return __smsc95xx_mdio_read(netdev, phy_id, idx, 1);
 280 }
 281
 282 static void smsc95xx_mdio_write_nopm(struct net_device *netdev, int phy_id,
 283                                      int idx, int regval)
 284 {
 285         __smsc95xx_mdio_write(netdev, phy_id, idx, regval, 1);
 286 }
 287
 288 static int smsc95xx_mdio_read(struct net_device *netdev, int phy_id, int idx)
 289 {
 290         return __smsc95xx_mdio_read(netdev, phy_id, idx, 0);
 291 }
 292
 293 static void smsc95xx_mdio_write(struct net_device *netdev, int phy_id, int idx,
 294                                 int regval)
 295 {
 296         __smsc95xx_mdio_write(netdev, phy_id, idx, regval, 0);
 297 }
 298
 299 static int __must_check smsc95xx_wait_eeprom(struct usbnet *dev)
 300 {
 301         unsigned long start_time = jiffies;
 302         u32 val;
 303         int ret;
 304
 305         do {
 306                 ret = smsc95xx_read_reg(dev, E2P_CMD, &val);
 307                 if (ret < 0) {
 308                         netdev_warn(dev->net, "Error reading E2P_CMD\n");
 309                         return ret;
 310                 }
 311
 312                 if (!(val & E2P_CMD_BUSY_) || (val & E2P_CMD_TIMEOUT_))
 313                         break;
 314                 udelay(40);
 315         } while (!time_after(jiffies, start_time + HZ));
 316
 317         if (val & (E2P_CMD_TIMEOUT_ | E2P_CMD_BUSY_)) {
 318                 netdev_warn(dev->net, "EEPROM read operation timeout\n");
 319                 return -EIO;
 320         }
 321
 322         return 0;
 323 }
 324
 325 static int __must_check smsc95xx_eeprom_confirm_not_busy(struct usbnet *dev)
 326 {
 327         unsigned long start_time = jiffies;
 328         u32 val;
 329         int ret;
 330
 331         do {
 332                 ret = smsc95xx_read_reg(dev, E2P_CMD, &val);
 333                 if (ret < 0) {
 334                         netdev_warn(dev->net, "Error reading E2P_CMD\n");
 335                         return ret;
 336                 }
 337
 338                 if (!(val & E2P_CMD_BUSY_))
 339                         return 0;
 340
 341                 udelay(40);
 342         } while (!time_after(jiffies, start_time + HZ));
 343
 344         netdev_warn(dev->net, "EEPROM is busy\n");
 345         return -EIO;
 346 }
 347
 348 static int smsc95xx_read_eeprom(struct usbnet *dev, u32 offset, u32 length,
 349                                 u8 *data)
 350 {
 351         u32 val;
 352         int i, ret;
 353
 354         BUG_ON(!dev);
 355         BUG_ON(!data);
 356
 357         ret = smsc95xx_eeprom_confirm_not_busy(dev);
 358         if (ret)
 359                 return ret;
 360
 361         for (i = 0; i < length; i++) {
 362                 val = E2P_CMD_BUSY_ | E2P_CMD_READ_ | (offset & E2P_CMD_ADDR_);
 363                 ret = smsc95xx_write_reg(dev, E2P_CMD, val);
 364                 if (ret < 0) {
 365                         netdev_warn(dev->net, "Error writing E2P_CMD\n");
 366                         return ret;
 367                 }
 368
 369                 ret = smsc95xx_wait_eeprom(dev);
 370                 if (ret < 0)
 371                         return ret;
 372
 373                 ret = smsc95xx_read_reg(dev, E2P_DATA, &val);
 374                 if (ret < 0) {
 375                         netdev_warn(dev->net, "Error reading E2P_DATA\n");
 376                         return ret;
 377                 }
 378
 379                 data[i] = val & 0xFF;
 380                 offset++;
 381         }
 382
 383         return 0;
 384 }
 385
 386 static int smsc95xx_write_eeprom(struct usbnet *dev, u32 offset, u32 length,
 387                                  u8 *data)
 388 {
 389         u32 val;
 390         int i, ret;
 391
 392         BUG_ON(!dev);
 393         BUG_ON(!data);
 394
 395         ret = smsc95xx_eeprom_confirm_not_busy(dev);
 396         if (ret)
 397                 return ret;
 398
 399         /* Issue write/erase enable command */
 400         val = E2P_CMD_BUSY_ | E2P_CMD_EWEN_;
 401         ret = smsc95xx_write_reg(dev, E2P_CMD, val);
 402         if (ret < 0) {
 403                 netdev_warn(dev->net, "Error writing E2P_DATA\n");
 404                 return ret;
 405         }
 406
 407         ret = smsc95xx_wait_eeprom(dev);
 408         if (ret < 0)
 409                 return ret;
 410
 411         for (i = 0; i < length; i++) {
 412
 413                 /* Fill data register */
 414                 val = data[i];
 415                 ret = smsc95xx_write_reg(dev, E2P_DATA, val);
 416                 if (ret < 0) {
 417                         netdev_warn(dev->net, "Error writing E2P_DATA\n");
 418                         return ret;
 419                 }
 420
 421                 /* Send "write" command */
 422                 val = E2P_CMD_BUSY_ | E2P_CMD_WRITE_ | (offset & E2P_CMD_ADDR_);
 423                 ret = smsc95xx_write_reg(dev, E2P_CMD, val);
 424                 if (ret < 0) {
 425                         netdev_warn(dev->net, "Error writing E2P_CMD\n");
 426                         return ret;
 427                 }
 428
 429                 ret = smsc95xx_wait_eeprom(dev);
 430                 if (ret < 0)
 431                         return ret;
 432
 433                 offset++;
 434         }
 435
 436         return 0;
 437 }
 438
 439 static int __must_check smsc95xx_write_reg_async(struct usbnet *dev, u16 index,
 440                                                  u32 data)
 441 {
 442         const u16 size = 4;
 443         u32 buf;
 444         int ret;
 445
 446         buf = data;
 447         cpu_to_le32s(&buf);
 448
 449         ret = usbnet_write_cmd_async(dev, USB_VENDOR_REQUEST_WRITE_REGISTER,
 450                                      USB_DIR_OUT | USB_TYPE_VENDOR |
 451                                      USB_RECIP_DEVICE,
 452                                      0, index, &buf, size);
 453         if (ret < 0)
 454                 netdev_warn(dev->net, "Error write async cmd, sts=%d\n",
 455                             ret);
 456         return ret;
 457 }
 458
 459 /* returns hash bit number for given MAC address
 460  * example:
 461  * 01 00 5E 00 00 01 -> returns bit number 31 */
 462 static unsigned int smsc95xx_hash(char addr[ETH_ALEN])
 463 {
 464         return (ether_crc(ETH_ALEN, addr) >> 26) & 0x3f;
 465 }
 466
 467 static void smsc95xx_set_multicast(struct net_device *netdev)
 468 {
 469         struct usbnet *dev = netdev_priv(netdev);
 470         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
 471         unsigned long flags;
 472         int ret;
 473
 474         pdata->hash_hi = 0;
 475         pdata->hash_lo = 0;
 476
 477         spin_lock_irqsave(&pdata->mac_cr_lock, flags);
 478
 479         if (dev->net->flags & IFF_PROMISC) {
 480                 netif_dbg(dev, drv, dev->net, "promiscuous mode enabled\n");
 481                 pdata->mac_cr |= MAC_CR_PRMS_;
 482                 pdata->mac_cr &= ~(MAC_CR_MCPAS_ | MAC_CR_HPFILT_);
 483         } else if (dev->net->flags & IFF_ALLMULTI) {
 484                 netif_dbg(dev, drv, dev->net, "receive all multicast enabled\n");
 485                 pdata->mac_cr |= MAC_CR_MCPAS_;
 486                 pdata->mac_cr &= ~(MAC_CR_PRMS_ | MAC_CR_HPFILT_);
 487         } else if (!netdev_mc_empty(dev->net)) {
 488                 struct netdev_hw_addr *ha;
 489
 490                 pdata->mac_cr |= MAC_CR_HPFILT_;
 491                 pdata->mac_cr &= ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_);
 492
 493                 netdev_for_each_mc_addr(ha, netdev) {
 494                         u32 bitnum = smsc95xx_hash(ha->addr);
 495                         u32 mask = 0x01 << (bitnum & 0x1F);
 496                         if (bitnum & 0x20)
 497                                 pdata->hash_hi |= mask;
 498                         else
 499                                 pdata->hash_lo |= mask;
 500                 }
 501
 502                 netif_dbg(dev, drv, dev->net, "HASHH=0x%08X, HASHL=0x%08X\n",
 503                                    pdata->hash_hi, pdata->hash_lo);
 504         } else {
 505                 netif_dbg(dev, drv, dev->net, "receive own packets only\n");
 506                 pdata->mac_cr &=
 507                         ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_ | MAC_CR_HPFILT_);
 508         }
 509
 510         spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
 511
 512         /* Initiate async writes, as we can't wait for completion here */
 513         ret = smsc95xx_write_reg_async(dev, HASHH, pdata->hash_hi);
 514         if (ret < 0)
 515                 netdev_warn(dev->net, "failed to initiate async write to HASHH\n");
 516
 517         ret = smsc95xx_write_reg_async(dev, HASHL, pdata->hash_lo);
 518         if (ret < 0)
 519                 netdev_warn(dev->net, "failed to initiate async write to HASHL\n");
 520
 521         ret = smsc95xx_write_reg_async(dev, MAC_CR, pdata->mac_cr);
 522         if (ret < 0)
 523                 netdev_warn(dev->net, "failed to initiate async write to MAC_CR\n");
 524 }
 525
 526 static int smsc95xx_phy_update_flowcontrol(struct usbnet *dev, u8 duplex,
 527                                            u16 lcladv, u16 rmtadv)
 528 {
 529         u32 flow, afc_cfg = 0;
 530
 531         int ret = smsc95xx_read_reg(dev, AFC_CFG, &afc_cfg);
 532         if (ret < 0)
 533                 return ret;
 534
 535         if (duplex == DUPLEX_FULL) {
 536                 u8 cap = mii_resolve_flowctrl_fdx(lcladv, rmtadv);
 537
 538                 if (cap & FLOW_CTRL_RX)
 539                         flow = 0xFFFF0002;
 540                 else
 541                         flow = 0;
 542
 543                 if (cap & FLOW_CTRL_TX)
 544                         afc_cfg |= 0xF;
 545                 else
 546                         afc_cfg &= ~0xF;
 547
 548                 netif_dbg(dev, link, dev->net, "rx pause %s, tx pause %s\n",
 549                                    cap & FLOW_CTRL_RX ? "enabled" : "disabled",
 550                                    cap & FLOW_CTRL_TX ? "enabled" : "disabled");
 551         } else {
 552                 netif_dbg(dev, link, dev->net, "half duplex\n");
 553                 flow = 0;
 554                 afc_cfg |= 0xF;
 555         }
 556
 557         ret = smsc95xx_write_reg(dev, FLOW, flow);
 558         if (ret < 0)
 559                 return ret;
 560
 561         return smsc95xx_write_reg(dev, AFC_CFG, afc_cfg);
 562 }
 563
 564 static int smsc95xx_link_reset(struct usbnet *dev)
 565 {
 566         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
 567         struct mii_if_info *mii = &dev->mii;
 568         struct ethtool_cmd ecmd = { .cmd = ETHTOOL_GSET };
 569         unsigned long flags;
 570         u16 lcladv, rmtadv;
 571         int ret;
 572
 573         /* clear interrupt status */
 574         ret = smsc95xx_mdio_read(dev->net, mii->phy_id, PHY_INT_SRC);
 575         if (ret < 0)
 576                 return ret;
 577
 578         ret = smsc95xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL_);
 579         if (ret < 0)
 580                 return ret;
 581
 582         mii_check_media(mii, 1, 1);
 583         mii_ethtool_gset(&dev->mii, &ecmd);
 584         lcladv = smsc95xx_mdio_read(dev->net, mii->phy_id, MII_ADVERTISE);
 585         rmtadv = smsc95xx_mdio_read(dev->net, mii->phy_id, MII_LPA);
 586
 587         netif_dbg(dev, link, dev->net,
 588                   "speed: %u duplex: %d lcladv: %04x rmtadv: %04x\n",
 589                   ethtool_cmd_speed(&ecmd), ecmd.duplex, lcladv, rmtadv);
 590
 591         spin_lock_irqsave(&pdata->mac_cr_lock, flags);
 592         if (ecmd.duplex != DUPLEX_FULL) {
 593                 pdata->mac_cr &= ~MAC_CR_FDPX_;
 594                 pdata->mac_cr |= MAC_CR_RCVOWN_;
 595         } else {
 596                 pdata->mac_cr &= ~MAC_CR_RCVOWN_;
 597                 pdata->mac_cr |= MAC_CR_FDPX_;
 598         }
 599         spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
 600
 601         ret = smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr);
 602         if (ret < 0)
 603                 return ret;
 604
 605         ret = smsc95xx_phy_update_flowcontrol(dev, ecmd.duplex, lcladv, rmtadv);
 606         if (ret < 0)
 607                 netdev_warn(dev->net, "Error updating PHY flow control\n");
 608
 609         return ret;
 610 }
 611
 612 static void smsc95xx_status(struct usbnet *dev, struct urb *urb)
 613 {
 614         u32 intdata;
 615
 616         if (urb->actual_length != 4) {
 617                 netdev_warn(dev->net, "unexpected urb length %d\n",
 618                             urb->actual_length);
 619                 return;
 620         }
 621
 622         memcpy(&intdata, urb->transfer_buffer, 4);
 623         le32_to_cpus(&intdata);
 624
 625         netif_dbg(dev, link, dev->net, "intdata: 0x%08X\n", intdata);
 626
 627         if (intdata & INT_ENP_PHY_INT_)
 628                 usbnet_defer_kevent(dev, EVENT_LINK_RESET);
 629         else
 630                 netdev_warn(dev->net, "unexpected interrupt, intdata=0x%08X\n",
 631                             intdata);
 632 }
 633
 634 static void set_carrier(struct usbnet *dev, bool link)
 635 {
 636         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
 637
 638         if (pdata->link_ok == link)
 639                 return;
 640
 641         pdata->link_ok = link;
 642
 643         if (link)
 644                 usbnet_link_change(dev, 1, 0);
 645         else
 646                 usbnet_link_change(dev, 0, 0);
 647 }
 648
 649 static void check_carrier(struct work_struct *work)
 650 {
 651         struct smsc95xx_priv *pdata = container_of(work, struct smsc95xx_priv,
 652                                                 carrier_check.work);
 653         struct usbnet *dev = pdata->dev;
 654         int ret;
 655
 656         if (pdata->suspend_flags != 0)
 657                 return;
 658
 659         ret = smsc95xx_mdio_read(dev->net, dev->mii.phy_id, MII_BMSR);
 660         if (ret < 0) {
 661                 netdev_warn(dev->net, "Failed to read MII_BMSR\n");
 662                 return;
 663         }
 664         if (ret & BMSR_LSTATUS)
 665                 set_carrier(dev, 1);
 666         else
 667                 set_carrier(dev, 0);
 668
 669         schedule_delayed_work(&pdata->carrier_check, CARRIER_CHECK_DELAY);
 670 }
 671
 672 /* Enable or disable Tx & Rx checksum offload engines */
 673 static int smsc95xx_set_features(struct net_device *netdev,
 674         netdev_features_t features)
 675 {
 676         struct usbnet *dev = netdev_priv(netdev);
 677         u32 read_buf;
 678         int ret;
 679
 680         ret = smsc95xx_read_reg(dev, COE_CR, &read_buf);
 681         if (ret < 0)
 682                 return ret;
 683
 684         if (features & NETIF_F_IP_CSUM)
 685                 read_buf |= Tx_COE_EN_;
 686         else
 687                 read_buf &= ~Tx_COE_EN_;
 688
 689         if (features & NETIF_F_RXCSUM)
 690                 read_buf |= Rx_COE_EN_;
 691         else
 692                 read_buf &= ~Rx_COE_EN_;
 693
 694         ret = smsc95xx_write_reg(dev, COE_CR, read_buf);
 695         if (ret < 0)
 696                 return ret;
 697
 698         netif_dbg(dev, hw, dev->net, "COE_CR = 0x%08x\n", read_buf);
 699         return 0;
 700 }
 701
 702 static int smsc95xx_ethtool_get_eeprom_len(struct net_device *net)
 703 {
 704         return MAX_EEPROM_SIZE;
 705 }
 706
 707 static int smsc95xx_ethtool_get_eeprom(struct net_device *netdev,
 708                                        struct ethtool_eeprom *ee, u8 *data)
 709 {
 710         struct usbnet *dev = netdev_priv(netdev);
 711
 712         ee->magic = LAN95XX_EEPROM_MAGIC;
 713
 714         return smsc95xx_read_eeprom(dev, ee->offset, ee->len, data);
 715 }
 716
 717 static int smsc95xx_ethtool_set_eeprom(struct net_device *netdev,
 718                                        struct ethtool_eeprom *ee, u8 *data)
 719 {
 720         struct usbnet *dev = netdev_priv(netdev);
 721
 722         if (ee->magic != LAN95XX_EEPROM_MAGIC) {
 723                 netdev_warn(dev->net, "EEPROM: magic value mismatch, magic = 0x%x\n",
 724                             ee->magic);
 725                 return -EINVAL;
 726         }
 727
 728         return smsc95xx_write_eeprom(dev, ee->offset, ee->len, data);
 729 }
 730
 731 static int smsc95xx_ethtool_getregslen(struct net_device *netdev)
 732 {
 733         /* all smsc95xx registers */
 734         return COE_CR - ID_REV + sizeof(u32);
 735 }
 736
 737 static void
 738 smsc95xx_ethtool_getregs(struct net_device *netdev, struct ethtool_regs *regs,
 739                          void *buf)
 740 {
 741         struct usbnet *dev = netdev_priv(netdev);
 742         unsigned int i, j;
 743         int retval;
 744         u32 *data = buf;
 745
 746         retval = smsc95xx_read_reg(dev, ID_REV, &regs->version);
 747         if (retval < 0) {
 748                 netdev_warn(netdev, "REGS: cannot read ID_REV\n");
 749                 return;
 750         }
 751
 752         for (i = ID_REV, j = 0; i <= COE_CR; i += (sizeof(u32)), j++) {
 753                 retval = smsc95xx_read_reg(dev, i, &data[j]);
 754                 if (retval < 0) {
 755                         netdev_warn(netdev, "REGS: cannot read reg[%x]\n", i);
 756                         return;
 757                 }
 758         }
 759 }
 760
 761 static void smsc95xx_ethtool_get_wol(struct net_device *net,
 762                                      struct ethtool_wolinfo *wolinfo)
 763 {
 764         struct usbnet *dev = netdev_priv(net);
 765         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
 766
 767         wolinfo->supported = SUPPORTED_WAKE;
 768         wolinfo->wolopts = pdata->wolopts;
 769 }
 770
 771 static int smsc95xx_ethtool_set_wol(struct net_device *net,
 772                                     struct ethtool_wolinfo *wolinfo)
 773 {
 774         struct usbnet *dev = netdev_priv(net);
 775         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
 776         int ret;
 777
 778         pdata->wolopts = wolinfo->wolopts & SUPPORTED_WAKE;
 779
 780         ret = device_set_wakeup_enable(&dev->udev->dev, pdata->wolopts);
 781         if (ret < 0)
 782                 netdev_warn(dev->net, "device_set_wakeup_enable error %d\n", ret);
 783
 784         return ret;
 785 }
 786
 787 static int get_mdix_status(struct net_device *net)
 788 {
 789         struct usbnet *dev = netdev_priv(net);
 790         u32 val;
 791         int buf;
 792
 793         buf = smsc95xx_mdio_read(dev->net, dev->mii.phy_id, SPECIAL_CTRL_STS);
 794         if (buf & SPECIAL_CTRL_STS_OVRRD_AMDIX_) {
 795                 if (buf & SPECIAL_CTRL_STS_AMDIX_ENABLE_)
 796                         return ETH_TP_MDI_AUTO;
 797                 else if (buf & SPECIAL_CTRL_STS_AMDIX_STATE_)
 798                         return ETH_TP_MDI_X;
 799         } else {
 800                 buf = smsc95xx_read_reg(dev, STRAP_STATUS, &val);
 801                 if (val & STRAP_STATUS_AMDIX_EN_)
 802                         return ETH_TP_MDI_AUTO;
 803         }
 804
 805         return ETH_TP_MDI;
 806 }
 807
 808 static void set_mdix_status(struct net_device *net, __u8 mdix_ctrl)
 809 {
 810         struct usbnet *dev = netdev_priv(net);
 811         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
 812         int buf;
 813
 814         if ((pdata->chip_id == ID_REV_CHIP_ID_9500A_) ||
 815             (pdata->chip_id == ID_REV_CHIP_ID_9530_) ||
 816             (pdata->chip_id == ID_REV_CHIP_ID_89530_) ||
 817             (pdata->chip_id == ID_REV_CHIP_ID_9730_)) {
 818                 /* Extend Manual AutoMDIX timer for 9500A/9500Ai */
 819                 buf = smsc95xx_mdio_read(dev->net, dev->mii.phy_id,
 820                                          PHY_EDPD_CONFIG);
 821                 buf |= PHY_EDPD_CONFIG_EXT_CROSSOVER_;
 822                 smsc95xx_mdio_write(dev->net, dev->mii.phy_id,
 823                                     PHY_EDPD_CONFIG, buf);
 824         }
 825
 826         if (mdix_ctrl == ETH_TP_MDI) {
 827                 buf = smsc95xx_mdio_read(dev->net, dev->mii.phy_id,
 828                                          SPECIAL_CTRL_STS);
 829                 buf |= SPECIAL_CTRL_STS_OVRRD_AMDIX_;
 830                 buf &= ~(SPECIAL_CTRL_STS_AMDIX_ENABLE_ |
 831                          SPECIAL_CTRL_STS_AMDIX_STATE_);
 832                 smsc95xx_mdio_write(dev->net, dev->mii.phy_id,
 833                                     SPECIAL_CTRL_STS, buf);
 834         } else if (mdix_ctrl == ETH_TP_MDI_X) {
 835                 buf = smsc95xx_mdio_read(dev->net, dev->mii.phy_id,
 836                                          SPECIAL_CTRL_STS);
 837                 buf |= SPECIAL_CTRL_STS_OVRRD_AMDIX_;
 838                 buf &= ~(SPECIAL_CTRL_STS_AMDIX_ENABLE_ |
 839                          SPECIAL_CTRL_STS_AMDIX_STATE_);
 840                 buf |= SPECIAL_CTRL_STS_AMDIX_STATE_;
 841                 smsc95xx_mdio_write(dev->net, dev->mii.phy_id,
 842                                     SPECIAL_CTRL_STS, buf);
 843         } else if (mdix_ctrl == ETH_TP_MDI_AUTO) {
 844                 buf = smsc95xx_mdio_read(dev->net, dev->mii.phy_id,
 845                                          SPECIAL_CTRL_STS);
 846                 buf &= ~SPECIAL_CTRL_STS_OVRRD_AMDIX_;
 847                 buf &= ~(SPECIAL_CTRL_STS_AMDIX_ENABLE_ |
 848                          SPECIAL_CTRL_STS_AMDIX_STATE_);
 849                 buf |= SPECIAL_CTRL_STS_AMDIX_ENABLE_;
 850                 smsc95xx_mdio_write(dev->net, dev->mii.phy_id,
 851                                     SPECIAL_CTRL_STS, buf);
 852         }
 853         pdata->mdix_ctrl = mdix_ctrl;
 854 }
 855
 856 static int smsc95xx_get_link_ksettings(struct net_device *net,
 857                                        struct ethtool_link_ksettings *cmd)
 858 {
 859         struct usbnet *dev = netdev_priv(net);
 860         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
 861         int retval;
 862
 863         retval = usbnet_get_link_ksettings(net, cmd);
 864
 865         cmd->base.eth_tp_mdix = pdata->mdix_ctrl;
 866         cmd->base.eth_tp_mdix_ctrl = pdata->mdix_ctrl;
 867
 868         return retval;
 869 }
 870
 871 static int smsc95xx_set_link_ksettings(struct net_device *net,
 872                                        const struct ethtool_link_ksettings *cmd)
 873 {
 874         struct usbnet *dev = netdev_priv(net);
 875         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
 876         int retval;
 877
 878         if (pdata->mdix_ctrl != cmd->base.eth_tp_mdix_ctrl)
 879                 set_mdix_status(net, cmd->base.eth_tp_mdix_ctrl);
 880
 881         retval = usbnet_set_link_ksettings(net, cmd);
 882
 883         return retval;
 884 }
 885
 886 static const struct ethtool_ops smsc95xx_ethtool_ops = {
 887         .get_link       = usbnet_get_link,
 888         .nway_reset     = usbnet_nway_reset,
 889         .get_drvinfo    = usbnet_get_drvinfo,
 890         .get_msglevel   = usbnet_get_msglevel,
 891         .set_msglevel   = usbnet_set_msglevel,
 892         .get_eeprom_len = smsc95xx_ethtool_get_eeprom_len,
 893         .get_eeprom     = smsc95xx_ethtool_get_eeprom,
 894         .set_eeprom     = smsc95xx_ethtool_set_eeprom,
 895         .get_regs_len   = smsc95xx_ethtool_getregslen,
 896         .get_regs       = smsc95xx_ethtool_getregs,
 897         .get_wol        = smsc95xx_ethtool_get_wol,
 898         .set_wol        = smsc95xx_ethtool_set_wol,
 899         .get_link_ksettings     = smsc95xx_get_link_ksettings,
 900         .set_link_ksettings     = smsc95xx_set_link_ksettings,
 901 };
 902
 903 static int smsc95xx_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
 904 {
 905         struct usbnet *dev = netdev_priv(netdev);
 906
 907         if (!netif_running(netdev))
 908                 return -EINVAL;
 909
 910         return generic_mii_ioctl(&dev->mii, if_mii(rq), cmd, NULL);
 911 }
 912
 913 static void smsc95xx_init_mac_address(struct usbnet *dev)
 914 {
 915         const u8 *mac_addr;
 916
 917         /* maybe the boot loader passed the MAC address in devicetree */
 918         mac_addr = of_get_mac_address(dev->udev->dev.of_node);
 919         if (mac_addr) {
 920                 memcpy(dev->net->dev_addr, mac_addr, ETH_ALEN);
 921                 return;
 922         }
 923
 924         /* try reading mac address from EEPROM */
 925         if (smsc95xx_read_eeprom(dev, EEPROM_MAC_OFFSET, ETH_ALEN,
 926                         dev->net->dev_addr) == 0) {
 927                 if (is_valid_ether_addr(dev->net->dev_addr)) {
 928                         /* eeprom values are valid so use them */
 929                         netif_dbg(dev, ifup, dev->net, "MAC address read from EEPROM\n");
 930                         return;
 931                 }
 932         }
 933
 934         /* no useful static MAC address found. generate a random one */
 935         eth_hw_addr_random(dev->net);
 936         netif_dbg(dev, ifup, dev->net, "MAC address set to eth_random_addr\n");
 937 }
 938
 939 static int smsc95xx_set_mac_address(struct usbnet *dev)
 940 {
 941         u32 addr_lo = dev->net->dev_addr[0] | dev->net->dev_addr[1] << 8 |
 942                 dev->net->dev_addr[2] << 16 | dev->net->dev_addr[3] << 24;
 943         u32 addr_hi = dev->net->dev_addr[4] | dev->net->dev_addr[5] << 8;
 944         int ret;
 945
 946         ret = smsc95xx_write_reg(dev, ADDRL, addr_lo);
 947         if (ret < 0)
 948                 return ret;
 949
 950         return smsc95xx_write_reg(dev, ADDRH, addr_hi);
 951 }
 952
 953 /* starts the TX path */
 954 static int smsc95xx_start_tx_path(struct usbnet *dev)
 955 {
 956         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
 957         unsigned long flags;
 958         int ret;
 959
 960         /* Enable Tx at MAC */
 961         spin_lock_irqsave(&pdata->mac_cr_lock, flags);
 962         pdata->mac_cr |= MAC_CR_TXEN_;
 963         spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
 964
 965         ret = smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr);
 966         if (ret < 0)
 967                 return ret;
 968
 969         /* Enable Tx at SCSRs */
 970         return smsc95xx_write_reg(dev, TX_CFG, TX_CFG_ON_);
 971 }
 972
 973 /* Starts the Receive path */
 974 static int smsc95xx_start_rx_path(struct usbnet *dev, int in_pm)
 975 {
 976         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
 977         unsigned long flags;
 978
 979         spin_lock_irqsave(&pdata->mac_cr_lock, flags);
 980         pdata->mac_cr |= MAC_CR_RXEN_;
 981         spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
 982
 983         return __smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr, in_pm);
 984 }
 985
 986 static int smsc95xx_phy_initialize(struct usbnet *dev)
 987 {
 988         int bmcr, ret, timeout = 0;
 989
 990         /* Initialize MII structure */
 991         dev->mii.dev = dev->net;
 992         dev->mii.mdio_read = smsc95xx_mdio_read;
 993         dev->mii.mdio_write = smsc95xx_mdio_write;
 994         dev->mii.phy_id_mask = 0x1f;
 995         dev->mii.reg_num_mask = 0x1f;
 996         dev->mii.phy_id = SMSC95XX_INTERNAL_PHY_ID;
 997
 998         /* reset phy and wait for reset to complete */
 999         smsc95xx_mdio_write(dev->net, dev->mii.phy_id, MII_BMCR, BMCR_RESET);
1000
1001         do {
1002                 msleep(10);
1003                 bmcr = smsc95xx_mdio_read(dev->net, dev->mii.phy_id, MII_BMCR);
1004                 timeout++;
1005         } while ((bmcr & BMCR_RESET) && (timeout < 100));
1006
1007         if (timeout >= 100) {
1008                 netdev_warn(dev->net, "timeout on PHY Reset");
1009                 return -EIO;
1010         }
1011
1012         smsc95xx_mdio_write(dev->net, dev->mii.phy_id, MII_ADVERTISE,
1013                 ADVERTISE_ALL | ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP |
1014                 ADVERTISE_PAUSE_ASYM);
1015
1016         /* read to clear */
1017         ret = smsc95xx_mdio_read(dev->net, dev->mii.phy_id, PHY_INT_SRC);
1018         if (ret < 0) {
1019                 netdev_warn(dev->net, "Failed to read PHY_INT_SRC during init\n");
1020                 return ret;
1021         }
1022
1023         smsc95xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_MASK,
1024                 PHY_INT_MASK_DEFAULT_);
1025         mii_nway_restart(&dev->mii);
1026
1027         netif_dbg(dev, ifup, dev->net, "phy initialised successfully\n");
1028         return 0;
1029 }
1030
1031 static int smsc95xx_reset(struct usbnet *dev)
1032 {
1033         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1034         u32 read_buf, write_buf, burst_cap;
1035         int ret = 0, timeout;
1036
1037         netif_dbg(dev, ifup, dev->net, "entering smsc95xx_reset\n");
1038
1039         ret = smsc95xx_write_reg(dev, HW_CFG, HW_CFG_LRST_);
1040         if (ret < 0)
1041                 return ret;
1042
1043         timeout = 0;
1044         do {
1045                 msleep(10);
1046                 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
1047                 if (ret < 0)
1048                         return ret;
1049                 timeout++;
1050         } while ((read_buf & HW_CFG_LRST_) && (timeout < 100));
1051
1052         if (timeout >= 100) {
1053                 netdev_warn(dev->net, "timeout waiting for completion of Lite Reset\n");
1054                 return ret;
1055         }
1056
1057         ret = smsc95xx_write_reg(dev, PM_CTRL, PM_CTL_PHY_RST_);
1058         if (ret < 0)
1059                 return ret;
1060
1061         timeout = 0;
1062         do {
1063                 msleep(10);
1064                 ret = smsc95xx_read_reg(dev, PM_CTRL, &read_buf);
1065                 if (ret < 0)
1066                         return ret;
1067                 timeout++;
1068         } while ((read_buf & PM_CTL_PHY_RST_) && (timeout < 100));
1069
1070         if (timeout >= 100) {
1071                 netdev_warn(dev->net, "timeout waiting for PHY Reset\n");
1072                 return ret;
1073         }
1074
1075         ret = smsc95xx_set_mac_address(dev);
1076         if (ret < 0)
1077                 return ret;
1078
1079         netif_dbg(dev, ifup, dev->net, "MAC Address: %pM\n",
1080                   dev->net->dev_addr);
1081
1082         ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
1083         if (ret < 0)
1084                 return ret;
1085
1086         netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG : 0x%08x\n",
1087                   read_buf);
1088
1089         read_buf |= HW_CFG_BIR_;
1090
1091         ret = smsc95xx_write_reg(dev, HW_CFG, read_buf);
1092         if (ret < 0)
1093                 return ret;
1094
1095         ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
1096         if (ret < 0)
1097                 return ret;
1098
1099         netif_dbg(dev, ifup, dev->net,
1100                   "Read Value from HW_CFG after writing HW_CFG_BIR_: 0x%08x\n",
1101                   read_buf);
1102
1103         if (!turbo_mode) {
1104                 burst_cap = 0;
1105                 dev->rx_urb_size = MAX_SINGLE_PACKET_SIZE;
1106         } else if (dev->udev->speed == USB_SPEED_HIGH) {
1107                 burst_cap = DEFAULT_HS_BURST_CAP_SIZE / HS_USB_PKT_SIZE;
1108                 dev->rx_urb_size = DEFAULT_HS_BURST_CAP_SIZE;
1109         } else {
1110                 burst_cap = DEFAULT_FS_BURST_CAP_SIZE / FS_USB_PKT_SIZE;
1111                 dev->rx_urb_size = DEFAULT_FS_BURST_CAP_SIZE;
1112         }
1113
1114         netif_dbg(dev, ifup, dev->net, "rx_urb_size=%ld\n",
1115                   (ulong)dev->rx_urb_size);
1116
1117         ret = smsc95xx_write_reg(dev, BURST_CAP, burst_cap);
1118         if (ret < 0)
1119                 return ret;
1120
1121         ret = smsc95xx_read_reg(dev, BURST_CAP, &read_buf);
1122         if (ret < 0)
1123                 return ret;
1124
1125         netif_dbg(dev, ifup, dev->net,
1126                   "Read Value from BURST_CAP after writing: 0x%08x\n",
1127                   read_buf);
1128
1129         ret = smsc95xx_write_reg(dev, BULK_IN_DLY, DEFAULT_BULK_IN_DELAY);
1130         if (ret < 0)
1131                 return ret;
1132
1133         ret = smsc95xx_read_reg(dev, BULK_IN_DLY, &read_buf);
1134         if (ret < 0)
1135                 return ret;
1136
1137         netif_dbg(dev, ifup, dev->net,
1138                   "Read Value from BULK_IN_DLY after writing: 0x%08x\n",
1139                   read_buf);
1140
1141         ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
1142         if (ret < 0)
1143                 return ret;
1144
1145         netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG: 0x%08x\n",
1146                   read_buf);
1147
1148         if (turbo_mode)
1149                 read_buf |= (HW_CFG_MEF_ | HW_CFG_BCE_);
1150
1151         read_buf &= ~HW_CFG_RXDOFF_;
1152
1153         /* set Rx data offset=2, Make IP header aligns on word boundary. */
1154         read_buf |= NET_IP_ALIGN << 9;
1155
1156         ret = smsc95xx_write_reg(dev, HW_CFG, read_buf);
1157         if (ret < 0)
1158                 return ret;
1159
1160         ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
1161         if (ret < 0)
1162                 return ret;
1163
1164         netif_dbg(dev, ifup, dev->net,
1165                   "Read Value from HW_CFG after writing: 0x%08x\n", read_buf);
1166
1167         ret = smsc95xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL_);
1168         if (ret < 0)
1169                 return ret;
1170
1171         ret = smsc95xx_read_reg(dev, ID_REV, &read_buf);
1172         if (ret < 0)
1173                 return ret;
1174         netif_dbg(dev, ifup, dev->net, "ID_REV = 0x%08x\n", read_buf);
1175
1176         /* Configure GPIO pins as LED outputs */
1177         write_buf = LED_GPIO_CFG_SPD_LED | LED_GPIO_CFG_LNK_LED |
1178                 LED_GPIO_CFG_FDX_LED;
1179         ret = smsc95xx_write_reg(dev, LED_GPIO_CFG, write_buf);
1180         if (ret < 0)
1181                 return ret;
1182
1183         /* Init Tx */
1184         ret = smsc95xx_write_reg(dev, FLOW, 0);
1185         if (ret < 0)
1186                 return ret;
1187
1188         ret = smsc95xx_write_reg(dev, AFC_CFG, AFC_CFG_DEFAULT);
1189         if (ret < 0)
1190                 return ret;
1191
1192         /* Don't need mac_cr_lock during initialisation */
1193         ret = smsc95xx_read_reg(dev, MAC_CR, &pdata->mac_cr);
1194         if (ret < 0)
1195                 return ret;
1196
1197         /* Init Rx */
1198         /* Set Vlan */
1199         ret = smsc95xx_write_reg(dev, VLAN1, (u32)ETH_P_8021Q);
1200         if (ret < 0)
1201                 return ret;
1202
1203         /* Enable or disable checksum offload engines */
1204         ret = smsc95xx_set_features(dev->net, dev->net->features);
1205         if (ret < 0) {
1206                 netdev_warn(dev->net, "Failed to set checksum offload features\n");
1207                 return ret;
1208         }
1209
1210         smsc95xx_set_multicast(dev->net);
1211
1212         ret = smsc95xx_phy_initialize(dev);
1213         if (ret < 0) {
1214                 netdev_warn(dev->net, "Failed to init PHY\n");
1215                 return ret;
1216         }
1217
1218         ret = smsc95xx_read_reg(dev, INT_EP_CTL, &read_buf);
1219         if (ret < 0)
1220                 return ret;
1221
1222         /* enable PHY interrupts */
1223         read_buf |= INT_EP_CTL_PHY_INT_;
1224
1225         ret = smsc95xx_write_reg(dev, INT_EP_CTL, read_buf);
1226         if (ret < 0)
1227                 return ret;
1228
1229         ret = smsc95xx_start_tx_path(dev);
1230         if (ret < 0) {
1231                 netdev_warn(dev->net, "Failed to start TX path\n");
1232                 return ret;
1233         }
1234
1235         ret = smsc95xx_start_rx_path(dev, 0);
1236         if (ret < 0) {
1237                 netdev_warn(dev->net, "Failed to start RX path\n");
1238                 return ret;
1239         }
1240
1241         netif_dbg(dev, ifup, dev->net, "smsc95xx_reset, return 0\n");
1242         return 0;
1243 }
1244
1245 static const struct net_device_ops smsc95xx_netdev_ops = {
1246         .ndo_open               = usbnet_open,
1247         .ndo_stop               = usbnet_stop,
1248         .ndo_start_xmit         = usbnet_start_xmit,
1249         .ndo_tx_timeout         = usbnet_tx_timeout,
1250         .ndo_change_mtu         = usbnet_change_mtu,
1251         .ndo_get_stats64        = usbnet_get_stats64,
1252         .ndo_set_mac_address    = eth_mac_addr,
1253         .ndo_validate_addr      = eth_validate_addr,
1254         .ndo_do_ioctl           = smsc95xx_ioctl,
1255         .ndo_set_rx_mode        = smsc95xx_set_multicast,
1256         .ndo_set_features       = smsc95xx_set_features,
1257 };
1258
1259 static int smsc95xx_bind(struct usbnet *dev, struct usb_interface *intf)
1260 {
1261         struct smsc95xx_priv *pdata = NULL;
1262         u32 val;
1263         int ret;
1264
1265         printk(KERN_INFO SMSC_CHIPNAME " v" SMSC_DRIVER_VERSION "\n");
1266
1267         ret = usbnet_get_endpoints(dev, intf);
1268         if (ret < 0) {
1269                 netdev_warn(dev->net, "usbnet_get_endpoints failed: %d\n", ret);
1270                 return ret;
1271         }
1272
1273         dev->data[0] = (unsigned long)kzalloc(sizeof(struct smsc95xx_priv),
1274                                               GFP_KERNEL);
1275
1276         pdata = (struct smsc95xx_priv *)(dev->data[0]);
1277         if (!pdata)
1278                 return -ENOMEM;
1279
1280         spin_lock_init(&pdata->mac_cr_lock);
1281
1282         /* LAN95xx devices do not alter the computed checksum of 0 to 0xffff.
1283          * RFC 2460, ipv6 UDP calculated checksum yields a result of zero must
1284          * be changed to 0xffff. RFC 768, ipv4 UDP computed checksum is zero,
1285          * it is transmitted as all ones. The zero transmitted checksum means
1286          * transmitter generated no checksum. Hence, enable csum offload only
1287          * for ipv4 packets.
1288          */
1289         if (DEFAULT_TX_CSUM_ENABLE)
1290                 dev->net->features |= NETIF_F_IP_CSUM;
1291         if (DEFAULT_RX_CSUM_ENABLE)
1292                 dev->net->features |= NETIF_F_RXCSUM;
1293
1294         dev->net->hw_features = NETIF_F_IP_CSUM | NETIF_F_RXCSUM;
1295
1296         smsc95xx_init_mac_address(dev);
1297
1298         /* Init all registers */
1299         ret = smsc95xx_reset(dev);
1300
1301         /* detect device revision as different features may be available */
1302         ret = smsc95xx_read_reg(dev, ID_REV, &val);
1303         if (ret < 0)
1304                 return ret;
1305         val >>= 16;
1306         pdata->chip_id = val;
1307         pdata->mdix_ctrl = get_mdix_status(dev->net);
1308
1309         if ((val == ID_REV_CHIP_ID_9500A_) || (val == ID_REV_CHIP_ID_9530_) ||
1310             (val == ID_REV_CHIP_ID_89530_) || (val == ID_REV_CHIP_ID_9730_))
1311                 pdata->features = (FEATURE_8_WAKEUP_FILTERS |
1312                         FEATURE_PHY_NLP_CROSSOVER |
1313                         FEATURE_REMOTE_WAKEUP);
1314         else if (val == ID_REV_CHIP_ID_9512_)
1315                 pdata->features = FEATURE_8_WAKEUP_FILTERS;
1316
1317         dev->net->netdev_ops = &smsc95xx_netdev_ops;
1318         dev->net->ethtool_ops = &smsc95xx_ethtool_ops;
1319         dev->net->flags |= IFF_MULTICAST;
1320         dev->net->hard_header_len += SMSC95XX_TX_OVERHEAD_CSUM;
1321         dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len;
1322
1323         pdata->dev = dev;
1324         INIT_DELAYED_WORK(&pdata->carrier_check, check_carrier);
1325         schedule_delayed_work(&pdata->carrier_check, CARRIER_CHECK_DELAY);
1326
1327         return 0;
1328 }
1329
1330 static void smsc95xx_unbind(struct usbnet *dev, struct usb_interface *intf)
1331 {
1332         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1333
1334         if (pdata) {
1335                 cancel_delayed_work(&pdata->carrier_check);
1336                 netif_dbg(dev, ifdown, dev->net, "free pdata\n");
1337                 kfree(pdata);
1338                 pdata = NULL;
1339                 dev->data[0] = 0;
1340         }
1341 }
1342
1343 static u32 smsc_crc(const u8 *buffer, size_t len, int filter)
1344 {
1345         u32 crc = bitrev16(crc16(0xFFFF, buffer, len));
1346         return crc << ((filter % 2) * 16);
1347 }
1348
1349 static int smsc95xx_enable_phy_wakeup_interrupts(struct usbnet *dev, u16 mask)
1350 {
1351         struct mii_if_info *mii = &dev->mii;
1352         int ret;
1353
1354         netdev_dbg(dev->net, "enabling PHY wakeup interrupts\n");
1355
1356         /* read to clear */
1357         ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_SRC);
1358         if (ret < 0)
1359                 return ret;
1360
1361         /* enable interrupt source */
1362         ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_MASK);
1363         if (ret < 0)
1364                 return ret;
1365
1366         ret |= mask;
1367
1368         smsc95xx_mdio_write_nopm(dev->net, mii->phy_id, PHY_INT_MASK, ret);
1369
1370         return 0;
1371 }
1372
1373 static int smsc95xx_link_ok_nopm(struct usbnet *dev)
1374 {
1375         struct mii_if_info *mii = &dev->mii;
1376         int ret;
1377
1378         /* first, a dummy read, needed to latch some MII phys */
1379         ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR);
1380         if (ret < 0)
1381                 return ret;
1382
1383         ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR);
1384         if (ret < 0)
1385                 return ret;
1386
1387         return !!(ret & BMSR_LSTATUS);
1388 }
1389
1390 static int smsc95xx_enter_suspend0(struct usbnet *dev)
1391 {
1392         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1393         u32 val;
1394         int ret;
1395
1396         ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1397         if (ret < 0)
1398                 return ret;
1399
1400         val &= (~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_));
1401         val |= PM_CTL_SUS_MODE_0;
1402
1403         ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1404         if (ret < 0)
1405                 return ret;
1406
1407         /* clear wol status */
1408         val &= ~PM_CTL_WUPS_;
1409         val |= PM_CTL_WUPS_WOL_;
1410
1411         /* enable energy detection */
1412         if (pdata->wolopts & WAKE_PHY)
1413                 val |= PM_CTL_WUPS_ED_;
1414
1415         ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1416         if (ret < 0)
1417                 return ret;
1418
1419         /* read back PM_CTRL */
1420         ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1421         if (ret < 0)
1422                 return ret;
1423
1424         pdata->suspend_flags |= SUSPEND_SUSPEND0;
1425
1426         return 0;
1427 }
1428
1429 static int smsc95xx_enter_suspend1(struct usbnet *dev)
1430 {
1431         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1432         struct mii_if_info *mii = &dev->mii;
1433         u32 val;
1434         int ret;
1435
1436         /* reconfigure link pulse detection timing for
1437          * compatibility with non-standard link partners
1438          */
1439         if (pdata->features & FEATURE_PHY_NLP_CROSSOVER)
1440                 smsc95xx_mdio_write_nopm(dev->net, mii->phy_id, PHY_EDPD_CONFIG,
1441                         PHY_EDPD_CONFIG_DEFAULT);
1442
1443         /* enable energy detect power-down mode */
1444         ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_MODE_CTRL_STS);
1445         if (ret < 0)
1446                 return ret;
1447
1448         ret |= MODE_CTRL_STS_EDPWRDOWN_;
1449
1450         smsc95xx_mdio_write_nopm(dev->net, mii->phy_id, PHY_MODE_CTRL_STS, ret);
1451
1452         /* enter SUSPEND1 mode */
1453         ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1454         if (ret < 0)
1455                 return ret;
1456
1457         val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_);
1458         val |= PM_CTL_SUS_MODE_1;
1459
1460         ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1461         if (ret < 0)
1462                 return ret;
1463
1464         /* clear wol status, enable energy detection */
1465         val &= ~PM_CTL_WUPS_;
1466         val |= (PM_CTL_WUPS_ED_ | PM_CTL_ED_EN_);
1467
1468         ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1469         if (ret < 0)
1470                 return ret;
1471
1472         pdata->suspend_flags |= SUSPEND_SUSPEND1;
1473
1474         return 0;
1475 }
1476
1477 static int smsc95xx_enter_suspend2(struct usbnet *dev)
1478 {
1479         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1480         u32 val;
1481         int ret;
1482
1483         ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1484         if (ret < 0)
1485                 return ret;
1486
1487         val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_);
1488         val |= PM_CTL_SUS_MODE_2;
1489
1490         ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1491         if (ret < 0)
1492                 return ret;
1493
1494         pdata->suspend_flags |= SUSPEND_SUSPEND2;
1495
1496         return 0;
1497 }
1498
1499 static int smsc95xx_enter_suspend3(struct usbnet *dev)
1500 {
1501         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1502         u32 val;
1503         int ret;
1504
1505         ret = smsc95xx_read_reg_nopm(dev, RX_FIFO_INF, &val);
1506         if (ret < 0)
1507                 return ret;
1508
1509         if (val & RX_FIFO_INF_USED_) {
1510                 netdev_info(dev->net, "rx fifo not empty in autosuspend\n");
1511                 return -EBUSY;
1512         }
1513
1514         ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1515         if (ret < 0)
1516                 return ret;
1517
1518         val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_);
1519         val |= PM_CTL_SUS_MODE_3 | PM_CTL_RES_CLR_WKP_STS;
1520
1521         ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1522         if (ret < 0)
1523                 return ret;
1524
1525         /* clear wol status */
1526         val &= ~PM_CTL_WUPS_;
1527         val |= PM_CTL_WUPS_WOL_;
1528
1529         ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1530         if (ret < 0)
1531                 return ret;
1532
1533         pdata->suspend_flags |= SUSPEND_SUSPEND3;
1534
1535         return 0;
1536 }
1537
1538 static int smsc95xx_autosuspend(struct usbnet *dev, u32 link_up)
1539 {
1540         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1541         int ret;
1542
1543         if (!netif_running(dev->net)) {
1544                 /* interface is ifconfig down so fully power down hw */
1545                 netdev_dbg(dev->net, "autosuspend entering SUSPEND2\n");
1546                 return smsc95xx_enter_suspend2(dev);
1547         }
1548
1549         if (!link_up) {
1550                 /* link is down so enter EDPD mode, but only if device can
1551                  * reliably resume from it.  This check should be redundant
1552                  * as current FEATURE_REMOTE_WAKEUP parts also support
1553                  * FEATURE_PHY_NLP_CROSSOVER but it's included for clarity */
1554                 if (!(pdata->features & FEATURE_PHY_NLP_CROSSOVER)) {
1555                         netdev_warn(dev->net, "EDPD not supported\n");
1556                         return -EBUSY;
1557                 }
1558
1559                 netdev_dbg(dev->net, "autosuspend entering SUSPEND1\n");
1560
1561                 /* enable PHY wakeup events for if cable is attached */
1562                 ret = smsc95xx_enable_phy_wakeup_interrupts(dev,
1563                         PHY_INT_MASK_ANEG_COMP_);
1564                 if (ret < 0) {
1565                         netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1566                         return ret;
1567                 }
1568
1569                 netdev_info(dev->net, "entering SUSPEND1 mode\n");
1570                 return smsc95xx_enter_suspend1(dev);
1571         }
1572
1573         /* enable PHY wakeup events so we remote wakeup if cable is pulled */
1574         ret = smsc95xx_enable_phy_wakeup_interrupts(dev,
1575                 PHY_INT_MASK_LINK_DOWN_);
1576         if (ret < 0) {
1577                 netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1578                 return ret;
1579         }
1580
1581         netdev_dbg(dev->net, "autosuspend entering SUSPEND3\n");
1582         return smsc95xx_enter_suspend3(dev);
1583 }
1584
1585 static int smsc95xx_suspend(struct usb_interface *intf, pm_message_t message)
1586 {
1587         struct usbnet *dev = usb_get_intfdata(intf);
1588         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1589         u32 val, link_up;
1590         int ret;
1591
1592         ret = usbnet_suspend(intf, message);
1593         if (ret < 0) {
1594                 netdev_warn(dev->net, "usbnet_suspend error\n");
1595                 return ret;
1596         }
1597
1598         if (pdata->suspend_flags) {
1599                 netdev_warn(dev->net, "error during last resume\n");
1600                 pdata->suspend_flags = 0;
1601         }
1602
1603         /* determine if link is up using only _nopm functions */
1604         link_up = smsc95xx_link_ok_nopm(dev);
1605
1606         if (message.event == PM_EVENT_AUTO_SUSPEND &&
1607             (pdata->features & FEATURE_REMOTE_WAKEUP)) {
1608                 ret = smsc95xx_autosuspend(dev, link_up);
1609                 goto done;
1610         }
1611
1612         /* if we get this far we're not autosuspending */
1613         /* if no wol options set, or if link is down and we're not waking on
1614          * PHY activity, enter lowest power SUSPEND2 mode
1615          */
1616         if (!(pdata->wolopts & SUPPORTED_WAKE) ||
1617                 !(link_up || (pdata->wolopts & WAKE_PHY))) {
1618                 netdev_info(dev->net, "entering SUSPEND2 mode\n");
1619
1620                 /* disable energy detect (link up) & wake up events */
1621                 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val);
1622                 if (ret < 0)
1623                         goto done;
1624
1625                 val &= ~(WUCSR_MPEN_ | WUCSR_WAKE_EN_);
1626
1627                 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val);
1628                 if (ret < 0)
1629                         goto done;
1630
1631                 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1632                 if (ret < 0)
1633                         goto done;
1634
1635                 val &= ~(PM_CTL_ED_EN_ | PM_CTL_WOL_EN_);
1636
1637                 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1638                 if (ret < 0)
1639                         goto done;
1640
1641                 ret = smsc95xx_enter_suspend2(dev);
1642                 goto done;
1643         }
1644
1645         if (pdata->wolopts & WAKE_PHY) {
1646                 ret = smsc95xx_enable_phy_wakeup_interrupts(dev,
1647                         (PHY_INT_MASK_ANEG_COMP_ | PHY_INT_MASK_LINK_DOWN_));
1648                 if (ret < 0) {
1649                         netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1650                         goto done;
1651                 }
1652
1653                 /* if link is down then configure EDPD and enter SUSPEND1,
1654                  * otherwise enter SUSPEND0 below
1655                  */
1656                 if (!link_up) {
1657                         netdev_info(dev->net, "entering SUSPEND1 mode\n");
1658                         ret = smsc95xx_enter_suspend1(dev);
1659                         goto done;
1660                 }
1661         }
1662
1663         if (pdata->wolopts & (WAKE_BCAST | WAKE_MCAST | WAKE_ARP | WAKE_UCAST)) {
1664                 u32 *filter_mask = kzalloc(sizeof(u32) * 32, GFP_KERNEL);
1665                 u32 command[2];
1666                 u32 offset[2];
1667                 u32 crc[4];
1668                 int wuff_filter_count =
1669                         (pdata->features & FEATURE_8_WAKEUP_FILTERS) ?
1670                         LAN9500A_WUFF_NUM : LAN9500_WUFF_NUM;
1671                 int i, filter = 0;
1672
1673                 if (!filter_mask) {
1674                         netdev_warn(dev->net, "Unable to allocate filter_mask\n");
1675                         ret = -ENOMEM;
1676                         goto done;
1677                 }
1678
1679                 memset(command, 0, sizeof(command));
1680                 memset(offset, 0, sizeof(offset));
1681                 memset(crc, 0, sizeof(crc));
1682
1683                 if (pdata->wolopts & WAKE_BCAST) {
1684                         const u8 bcast[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
1685                         netdev_info(dev->net, "enabling broadcast detection\n");
1686                         filter_mask[filter * 4] = 0x003F;
1687                         filter_mask[filter * 4 + 1] = 0x00;
1688                         filter_mask[filter * 4 + 2] = 0x00;
1689                         filter_mask[filter * 4 + 3] = 0x00;
1690                         command[filter/4] |= 0x05UL << ((filter % 4) * 8);
1691                         offset[filter/4] |= 0x00 << ((filter % 4) * 8);
1692                         crc[filter/2] |= smsc_crc(bcast, 6, filter);
1693                         filter++;
1694                 }
1695
1696                 if (pdata->wolopts & WAKE_MCAST) {
1697                         const u8 mcast[] = {0x01, 0x00, 0x5E};
1698                         netdev_info(dev->net, "enabling multicast detection\n");
1699                         filter_mask[filter * 4] = 0x0007;
1700                         filter_mask[filter * 4 + 1] = 0x00;
1701                         filter_mask[filter * 4 + 2] = 0x00;
1702                         filter_mask[filter * 4 + 3] = 0x00;
1703                         command[filter/4] |= 0x09UL << ((filter % 4) * 8);
1704                         offset[filter/4] |= 0x00  << ((filter % 4) * 8);
1705                         crc[filter/2] |= smsc_crc(mcast, 3, filter);
1706                         filter++;
1707                 }
1708
1709                 if (pdata->wolopts & WAKE_ARP) {
1710                         const u8 arp[] = {0x08, 0x06};
1711                         netdev_info(dev->net, "enabling ARP detection\n");
1712                         filter_mask[filter * 4] = 0x0003;
1713                         filter_mask[filter * 4 + 1] = 0x00;
1714                         filter_mask[filter * 4 + 2] = 0x00;
1715                         filter_mask[filter * 4 + 3] = 0x00;
1716                         command[filter/4] |= 0x05UL << ((filter % 4) * 8);
1717                         offset[filter/4] |= 0x0C << ((filter % 4) * 8);
1718                         crc[filter/2] |= smsc_crc(arp, 2, filter);
1719                         filter++;
1720                 }
1721
1722                 if (pdata->wolopts & WAKE_UCAST) {
1723                         netdev_info(dev->net, "enabling unicast detection\n");
1724                         filter_mask[filter * 4] = 0x003F;
1725                         filter_mask[filter * 4 + 1] = 0x00;
1726                         filter_mask[filter * 4 + 2] = 0x00;
1727                         filter_mask[filter * 4 + 3] = 0x00;
1728                         command[filter/4] |= 0x01UL << ((filter % 4) * 8);
1729                         offset[filter/4] |= 0x00 << ((filter % 4) * 8);
1730                         crc[filter/2] |= smsc_crc(dev->net->dev_addr, ETH_ALEN, filter);
1731                         filter++;
1732                 }
1733
1734                 for (i = 0; i < (wuff_filter_count * 4); i++) {
1735                         ret = smsc95xx_write_reg_nopm(dev, WUFF, filter_mask[i]);
1736                         if (ret < 0) {
1737                                 kfree(filter_mask);
1738                                 goto done;
1739                         }
1740                 }
1741                 kfree(filter_mask);
1742
1743                 for (i = 0; i < (wuff_filter_count / 4); i++) {
1744                         ret = smsc95xx_write_reg_nopm(dev, WUFF, command[i]);
1745                         if (ret < 0)
1746                                 goto done;
1747                 }
1748
1749                 for (i = 0; i < (wuff_filter_count / 4); i++) {
1750                         ret = smsc95xx_write_reg_nopm(dev, WUFF, offset[i]);
1751                         if (ret < 0)
1752                                 goto done;
1753                 }
1754
1755                 for (i = 0; i < (wuff_filter_count / 2); i++) {
1756                         ret = smsc95xx_write_reg_nopm(dev, WUFF, crc[i]);
1757                         if (ret < 0)
1758                                 goto done;
1759                 }
1760
1761                 /* clear any pending pattern match packet status */
1762                 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val);
1763                 if (ret < 0)
1764                         goto done;
1765
1766                 val |= WUCSR_WUFR_;
1767
1768                 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val);
1769                 if (ret < 0)
1770                         goto done;
1771         }
1772
1773         if (pdata->wolopts & WAKE_MAGIC) {
1774                 /* clear any pending magic packet status */
1775                 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val);
1776                 if (ret < 0)
1777                         goto done;
1778
1779                 val |= WUCSR_MPR_;
1780
1781                 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val);
1782                 if (ret < 0)
1783                         goto done;
1784         }
1785
1786         /* enable/disable wakeup sources */
1787         ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val);
1788         if (ret < 0)
1789                 goto done;
1790
1791         if (pdata->wolopts & (WAKE_BCAST | WAKE_MCAST | WAKE_ARP | WAKE_UCAST)) {
1792                 netdev_info(dev->net, "enabling pattern match wakeup\n");
1793                 val |= WUCSR_WAKE_EN_;
1794         } else {
1795                 netdev_info(dev->net, "disabling pattern match wakeup\n");
1796                 val &= ~WUCSR_WAKE_EN_;
1797         }
1798
1799         if (pdata->wolopts & WAKE_MAGIC) {
1800                 netdev_info(dev->net, "enabling magic packet wakeup\n");
1801                 val |= WUCSR_MPEN_;
1802         } else {
1803                 netdev_info(dev->net, "disabling magic packet wakeup\n");
1804                 val &= ~WUCSR_MPEN_;
1805         }
1806
1807         ret = smsc95xx_write_reg_nopm(dev, WUCSR, val);
1808         if (ret < 0)
1809                 goto done;
1810
1811         /* enable wol wakeup source */
1812         ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1813         if (ret < 0)
1814                 goto done;
1815
1816         val |= PM_CTL_WOL_EN_;
1817
1818         /* phy energy detect wakeup source */
1819         if (pdata->wolopts & WAKE_PHY)
1820                 val |= PM_CTL_ED_EN_;
1821
1822         ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1823         if (ret < 0)
1824                 goto done;
1825
1826         /* enable receiver to enable frame reception */
1827         smsc95xx_start_rx_path(dev, 1);
1828
1829         /* some wol options are enabled, so enter SUSPEND0 */
1830         netdev_info(dev->net, "entering SUSPEND0 mode\n");
1831         ret = smsc95xx_enter_suspend0(dev);
1832
1833 done:
1834         /*
1835          * TODO: resume() might need to handle the suspend failure
1836          * in system sleep
1837          */
1838         if (ret && PMSG_IS_AUTO(message))
1839                 usbnet_resume(intf);
1840         return ret;
1841 }
1842
1843 static int smsc95xx_resume(struct usb_interface *intf)
1844 {
1845         struct usbnet *dev = usb_get_intfdata(intf);
1846         struct smsc95xx_priv *pdata;
1847         u8 suspend_flags;
1848         int ret;
1849         u32 val;
1850
1851         BUG_ON(!dev);
1852         pdata = (struct smsc95xx_priv *)(dev->data[0]);
1853         suspend_flags = pdata->suspend_flags;
1854
1855         netdev_dbg(dev->net, "resume suspend_flags=0x%02x\n", suspend_flags);
1856
1857         /* do this first to ensure it's cleared even in error case */
1858         pdata->suspend_flags = 0;
1859         schedule_delayed_work(&pdata->carrier_check, CARRIER_CHECK_DELAY);
1860
1861         if (suspend_flags & SUSPEND_ALLMODES) {
1862                 /* clear wake-up sources */
1863                 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val);
1864                 if (ret < 0)
1865                         return ret;
1866
1867                 val &= ~(WUCSR_WAKE_EN_ | WUCSR_MPEN_);
1868
1869                 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val);
1870                 if (ret < 0)
1871                         return ret;
1872
1873                 /* clear wake-up status */
1874                 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1875                 if (ret < 0)
1876                         return ret;
1877
1878                 val &= ~PM_CTL_WOL_EN_;
1879                 val |= PM_CTL_WUPS_;
1880
1881                 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1882                 if (ret < 0)
1883                         return ret;
1884         }
1885
1886         ret = usbnet_resume(intf);
1887         if (ret < 0)
1888                 netdev_warn(dev->net, "usbnet_resume error\n");
1889
1890         return ret;
1891 }
1892
1893 static int smsc95xx_reset_resume(struct usb_interface *intf)
1894 {
1895         struct usbnet *dev = usb_get_intfdata(intf);
1896         int ret;
1897
1898         ret = smsc95xx_reset(dev);
1899         if (ret < 0)
1900                 return ret;
1901
1902         return smsc95xx_resume(intf);
1903 }
1904
1905 static void smsc95xx_rx_csum_offload(struct sk_buff *skb)
1906 {
1907         skb->csum = *(u16 *)(skb_tail_pointer(skb) - 2);
1908         skb->ip_summed = CHECKSUM_COMPLETE;
1909         skb_trim(skb, skb->len - 2);
1910 }
1911
1912 static int smsc95xx_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
1913 {
1914         /* This check is no longer done by usbnet */
1915         if (skb->len < dev->net->hard_header_len)
1916                 return 0;
1917
1918         while (skb->len > 0) {
1919                 u32 header, align_count;
1920                 struct sk_buff *ax_skb;
1921                 unsigned char *packet;
1922                 u16 size;
1923
1924                 memcpy(&header, skb->data, sizeof(header));
1925                 le32_to_cpus(&header);
1926                 skb_pull(skb, 4 + NET_IP_ALIGN);
1927                 packet = skb->data;
1928
1929                 /* get the packet length */
1930                 size = (u16)((header & RX_STS_FL_) >> 16);
1931                 align_count = (4 - ((size + NET_IP_ALIGN) % 4)) % 4;
1932
1933                 if (unlikely(header & RX_STS_ES_)) {
1934                         netif_dbg(dev, rx_err, dev->net,
1935                                   "Error header=0x%08x\n", header);
1936                         dev->net->stats.rx_errors++;
1937                         dev->net->stats.rx_dropped++;
1938
1939                         if (header & RX_STS_CRC_) {
1940                                 dev->net->stats.rx_crc_errors++;
1941                         } else {
1942                                 if (header & (RX_STS_TL_ | RX_STS_RF_))
1943                                         dev->net->stats.rx_frame_errors++;
1944
1945                                 if ((header & RX_STS_LE_) &&
1946                                         (!(header & RX_STS_FT_)))
1947                                         dev->net->stats.rx_length_errors++;
1948                         }
1949                 } else {
1950                         /* ETH_FRAME_LEN + 4(CRC) + 2(COE) + 4(Vlan) */
1951                         if (unlikely(size > (ETH_FRAME_LEN + 12))) {
1952                                 netif_dbg(dev, rx_err, dev->net,
1953                                           "size err header=0x%08x\n", header);
1954                                 return 0;
1955                         }
1956
1957                         /* last frame in this batch */
1958                         if (skb->len == size) {
1959                                 if (dev->net->features & NETIF_F_RXCSUM)
1960                                         smsc95xx_rx_csum_offload(skb);
1961                                 skb_trim(skb, skb->len - 4); /* remove fcs */
1962                                 skb->truesize = size + sizeof(struct sk_buff);
1963
1964                                 return 1;
1965                         }
1966
1967                         ax_skb = skb_clone(skb, GFP_ATOMIC);
1968                         if (unlikely(!ax_skb)) {
1969                                 netdev_warn(dev->net, "Error allocating skb\n");
1970                                 return 0;
1971                         }
1972
1973                         ax_skb->len = size;
1974                         ax_skb->data = packet;
1975                         skb_set_tail_pointer(ax_skb, size);
1976
1977                         if (dev->net->features & NETIF_F_RXCSUM)
1978                                 smsc95xx_rx_csum_offload(ax_skb);
1979                         skb_trim(ax_skb, ax_skb->len - 4); /* remove fcs */
1980                         ax_skb->truesize = size + sizeof(struct sk_buff);
1981
1982                         usbnet_skb_return(dev, ax_skb);
1983                 }
1984
1985                 skb_pull(skb, size);
1986
1987                 /* padding bytes before the next frame starts */
1988                 if (skb->len)
1989                         skb_pull(skb, align_count);
1990         }
1991
1992         return 1;
1993 }
1994
1995 static u32 smsc95xx_calc_csum_preamble(struct sk_buff *skb)
1996 {
1997         u16 low_16 = (u16)skb_checksum_start_offset(skb);
1998         u16 high_16 = low_16 + skb->csum_offset;
1999         return (high_16 << 16) | low_16;
2000 }
2001
2002 static struct sk_buff *smsc95xx_tx_fixup(struct usbnet *dev,
2003                                          struct sk_buff *skb, gfp_t flags)
2004 {
2005         bool csum = skb->ip_summed == CHECKSUM_PARTIAL;
2006         int overhead = csum ? SMSC95XX_TX_OVERHEAD_CSUM : SMSC95XX_TX_OVERHEAD;
2007         u32 tx_cmd_a, tx_cmd_b;
2008
2009         /* We do not advertise SG, so skbs should be already linearized */
2010         BUG_ON(skb_shinfo(skb)->nr_frags);
2011
2012         /* Make writable and expand header space by overhead if required */
2013         if (skb_cow_head(skb, overhead)) {
2014                 /* Must deallocate here as returning NULL to indicate error
2015                  * means the skb won't be deallocated in the caller.
2016                  */
2017                 dev_kfree_skb_any(skb);
2018                 return NULL;
2019         }
2020
2021         if (csum) {
2022                 if (skb->len <= 45) {
2023                         /* workaround - hardware tx checksum does not work
2024                          * properly with extremely small packets */
2025                         long csstart = skb_checksum_start_offset(skb);
2026                         __wsum calc = csum_partial(skb->data + csstart,
2027                                 skb->len - csstart, 0);
2028                         *((__sum16 *)(skb->data + csstart
2029                                 + skb->csum_offset)) = csum_fold(calc);
2030
2031                         csum = false;
2032                 } else {
2033                         u32 csum_preamble = smsc95xx_calc_csum_preamble(skb);
2034                         skb_push(skb, 4);
2035                         cpu_to_le32s(&csum_preamble);
2036                         memcpy(skb->data, &csum_preamble, 4);
2037                 }
2038         }
2039
2040         skb_push(skb, 4);
2041         tx_cmd_b = (u32)(skb->len - 4);
2042         if (csum)
2043                 tx_cmd_b |= TX_CMD_B_CSUM_ENABLE;
2044         cpu_to_le32s(&tx_cmd_b);
2045         memcpy(skb->data, &tx_cmd_b, 4);
2046
2047         skb_push(skb, 4);
2048         tx_cmd_a = (u32)(skb->len - 8) | TX_CMD_A_FIRST_SEG_ |
2049                 TX_CMD_A_LAST_SEG_;
2050         cpu_to_le32s(&tx_cmd_a);
2051         memcpy(skb->data, &tx_cmd_a, 4);
2052
2053         return skb;
2054 }
2055
2056 static int smsc95xx_manage_power(struct usbnet *dev, int on)
2057 {
2058         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
2059
2060         dev->intf->needs_remote_wakeup = on;
2061
2062         if (pdata->features & FEATURE_REMOTE_WAKEUP)
2063                 return 0;
2064
2065         /* this chip revision isn't capable of remote wakeup */
2066         netdev_info(dev->net, "hardware isn't capable of remote wakeup\n");
2067
2068         if (on)
2069                 usb_autopm_get_interface_no_resume(dev->intf);
2070         else
2071                 usb_autopm_put_interface(dev->intf);
2072
2073         return 0;
2074 }
2075
2076 static const struct driver_info smsc95xx_info = {
2077         .description    = "smsc95xx USB 2.0 Ethernet",
2078         .bind           = smsc95xx_bind,
2079         .unbind         = smsc95xx_unbind,
2080         .link_reset     = smsc95xx_link_reset,
2081         .reset          = smsc95xx_reset,
2082         .rx_fixup       = smsc95xx_rx_fixup,
2083         .tx_fixup       = smsc95xx_tx_fixup,
2084         .status         = smsc95xx_status,
2085         .manage_power   = smsc95xx_manage_power,
2086         .flags          = FLAG_ETHER | FLAG_SEND_ZLP | FLAG_LINK_INTR,
2087 };
2088
2089 static const struct usb_device_id products[] = {
2090         {
2091                 /* SMSC9500 USB Ethernet Device */
2092                 USB_DEVICE(0x0424, 0x9500),
2093                 .driver_info = (unsigned long) &smsc95xx_info,
2094         },
2095         {
2096                 /* SMSC9505 USB Ethernet Device */
2097                 USB_DEVICE(0x0424, 0x9505),
2098                 .driver_info = (unsigned long) &smsc95xx_info,
2099         },
2100         {
2101                 /* SMSC9500A USB Ethernet Device */
2102                 USB_DEVICE(0x0424, 0x9E00),
2103                 .driver_info = (unsigned long) &smsc95xx_info,
2104         },
2105         {
2106                 /* SMSC9505A USB Ethernet Device */
2107                 USB_DEVICE(0x0424, 0x9E01),
2108                 .driver_info = (unsigned long) &smsc95xx_info,
2109         },
2110         {
2111                 /* SMSC9512/9514 USB Hub & Ethernet Device */
2112                 USB_DEVICE(0x0424, 0xec00),
2113                 .driver_info = (unsigned long) &smsc95xx_info,
2114         },
2115         {
2116                 /* SMSC9500 USB Ethernet Device (SAL10) */
2117                 USB_DEVICE(0x0424, 0x9900),
2118                 .driver_info = (unsigned long) &smsc95xx_info,
2119         },
2120         {
2121                 /* SMSC9505 USB Ethernet Device (SAL10) */
2122                 USB_DEVICE(0x0424, 0x9901),
2123                 .driver_info = (unsigned long) &smsc95xx_info,
2124         },
2125         {
2126                 /* SMSC9500A USB Ethernet Device (SAL10) */
2127                 USB_DEVICE(0x0424, 0x9902),
2128                 .driver_info = (unsigned long) &smsc95xx_info,
2129         },
2130         {
2131                 /* SMSC9505A USB Ethernet Device (SAL10) */
2132                 USB_DEVICE(0x0424, 0x9903),
2133                 .driver_info = (unsigned long) &smsc95xx_info,
2134         },
2135         {
2136                 /* SMSC9512/9514 USB Hub & Ethernet Device (SAL10) */
2137                 USB_DEVICE(0x0424, 0x9904),
2138                 .driver_info = (unsigned long) &smsc95xx_info,
2139         },
2140         {
2141                 /* SMSC9500A USB Ethernet Device (HAL) */
2142                 USB_DEVICE(0x0424, 0x9905),
2143                 .driver_info = (unsigned long) &smsc95xx_info,
2144         },
2145         {
2146                 /* SMSC9505A USB Ethernet Device (HAL) */
2147                 USB_DEVICE(0x0424, 0x9906),
2148                 .driver_info = (unsigned long) &smsc95xx_info,
2149         },
2150         {
2151                 /* SMSC9500 USB Ethernet Device (Alternate ID) */
2152                 USB_DEVICE(0x0424, 0x9907),
2153                 .driver_info = (unsigned long) &smsc95xx_info,
2154         },
2155         {
2156                 /* SMSC9500A USB Ethernet Device (Alternate ID) */
2157                 USB_DEVICE(0x0424, 0x9908),
2158                 .driver_info = (unsigned long) &smsc95xx_info,
2159         },
2160         {
2161                 /* SMSC9512/9514 USB Hub & Ethernet Device (Alternate ID) */
2162                 USB_DEVICE(0x0424, 0x9909),
2163                 .driver_info = (unsigned long) &smsc95xx_info,
2164         },
2165         {
2166                 /* SMSC LAN9530 USB Ethernet Device */
2167                 USB_DEVICE(0x0424, 0x9530),
2168                 .driver_info = (unsigned long) &smsc95xx_info,
2169         },
2170         {
2171                 /* SMSC LAN9730 USB Ethernet Device */
2172                 USB_DEVICE(0x0424, 0x9730),
2173                 .driver_info = (unsigned long) &smsc95xx_info,
2174         },
2175         {
2176                 /* SMSC LAN89530 USB Ethernet Device */
2177                 USB_DEVICE(0x0424, 0x9E08),
2178                 .driver_info = (unsigned long) &smsc95xx_info,
2179         },
2180         { },            /* END */
2181 };
2182 MODULE_DEVICE_TABLE(usb, products);
2183
2184 static struct usb_driver smsc95xx_driver = {
2185         .name           = "smsc95xx",
2186         .id_table       = products,
2187         .probe          = usbnet_probe,
2188         .suspend        = smsc95xx_suspend,
2189         .resume         = smsc95xx_resume,
2190         .reset_resume   = smsc95xx_reset_resume,
2191         .disconnect     = usbnet_disconnect,
2192         .disable_hub_initiated_lpm = 1,
2193         .supports_autosuspend = 1,
2194 };
2195
2196 module_usb_driver(smsc95xx_driver);
2197
2198 MODULE_AUTHOR("Nancy Lin");
2199 MODULE_AUTHOR("Steve Glendinning <steve.glendinning@shawell.net>");
2200 MODULE_DESCRIPTION("SMSC95XX USB 2.0 Ethernet Devices");
2201 MODULE_LICENSE("GPL");