drivers/net/usb/smsc95xx.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2  /***************************************************************************
   3  *
   4  * Copyright (C) 2007-2008 SMSC
   5  *
   6  *****************************************************************************/
   7
   8 #include <linux/module.h>
   9 #include <linux/kmod.h>
  10 #include <linux/netdevice.h>
  11 #include <linux/etherdevice.h>
  12 #include <linux/ethtool.h>
  13 #include <linux/mii.h>
  14 #include <linux/usb.h>
  15 #include <linux/bitrev.h>
  16 #include <linux/crc16.h>
  17 #include <linux/crc32.h>
  18 #include <linux/usb/usbnet.h>
  19 #include <linux/slab.h>
  20 #include <linux/of_net.h>
  21 #include "smsc95xx.h"
  22
  23 #define SMSC_CHIPNAME                   "smsc95xx"
  24 #define SMSC_DRIVER_VERSION             "1.0.6"
  25 #define HS_USB_PKT_SIZE                 (512)
  26 #define FS_USB_PKT_SIZE                 (64)
  27 #define DEFAULT_HS_BURST_CAP_SIZE       (16 * 1024 + 5 * HS_USB_PKT_SIZE)
  28 #define DEFAULT_FS_BURST_CAP_SIZE       (6 * 1024 + 33 * FS_USB_PKT_SIZE)
  29 #define DEFAULT_BULK_IN_DELAY           (0x00002000)
  30 #define MAX_SINGLE_PACKET_SIZE          (2048)
  31 #define LAN95XX_EEPROM_MAGIC            (0x9500)
  32 #define EEPROM_MAC_OFFSET               (0x01)
  33 #define DEFAULT_TX_CSUM_ENABLE          (true)
  34 #define DEFAULT_RX_CSUM_ENABLE          (true)
  35 #define SMSC95XX_INTERNAL_PHY_ID        (1)
  36 #define SMSC95XX_TX_OVERHEAD            (8)
  37 #define SMSC95XX_TX_OVERHEAD_CSUM       (12)
  38 #define SUPPORTED_WAKE                  (WAKE_PHY | WAKE_UCAST | WAKE_BCAST | \
  39                                          WAKE_MCAST | WAKE_ARP | WAKE_MAGIC)
  40
  41 #define FEATURE_8_WAKEUP_FILTERS        (0x01)
  42 #define FEATURE_PHY_NLP_CROSSOVER       (0x02)
  43 #define FEATURE_REMOTE_WAKEUP           (0x04)
  44
  45 #define SUSPEND_SUSPEND0                (0x01)
  46 #define SUSPEND_SUSPEND1                (0x02)
  47 #define SUSPEND_SUSPEND2                (0x04)
  48 #define SUSPEND_SUSPEND3                (0x08)
  49 #define SUSPEND_ALLMODES                (SUSPEND_SUSPEND0 | SUSPEND_SUSPEND1 | \
  50                                          SUSPEND_SUSPEND2 | SUSPEND_SUSPEND3)
  51
  52 #define CARRIER_CHECK_DELAY (2 * HZ)
  53
  54 struct smsc95xx_priv {
  55         u32 chip_id;
  56         u32 mac_cr;
  57         u32 hash_hi;
  58         u32 hash_lo;
  59         u32 wolopts;
  60         spinlock_t mac_cr_lock;
  61         u8 features;
  62         u8 suspend_flags;
  63         u8 mdix_ctrl;
  64         bool link_ok;
  65         struct delayed_work carrier_check;
  66         struct usbnet *dev;
  67 };
  68
  69 static bool turbo_mode = true;
  70 module_param(turbo_mode, bool, 0644);
  71 MODULE_PARM_DESC(turbo_mode, "Enable multiple frames per Rx transaction");
  72
  73 static int __must_check __smsc95xx_read_reg(struct usbnet *dev, u32 index,
  74                                             u32 *data, int in_pm)
  75 {
  76         u32 buf;
  77         int ret;
  78         int (*fn)(struct usbnet *, u8, u8, u16, u16, void *, u16);
  79
  80         BUG_ON(!dev);
  81
  82         if (!in_pm)
  83                 fn = usbnet_read_cmd;
  84         else
  85                 fn = usbnet_read_cmd_nopm;
  86
  87         ret = fn(dev, USB_VENDOR_REQUEST_READ_REGISTER, USB_DIR_IN
  88                  | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
  89                  0, index, &buf, 4);
  90         if (unlikely(ret < 0)) {
  91                 netdev_warn(dev->net, "Failed to read reg index 0x%08x: %d\n",
  92                             index, ret);
  93                 return ret;
  94         }
  95
  96         le32_to_cpus(&buf);
  97         *data = buf;
  98
  99         return ret;
 100 }
 101
 102 static int __must_check __smsc95xx_write_reg(struct usbnet *dev, u32 index,
 103                                              u32 data, int in_pm)
 104 {
 105         u32 buf;
 106         int ret;
 107         int (*fn)(struct usbnet *, u8, u8, u16, u16, const void *, u16);
 108
 109         BUG_ON(!dev);
 110
 111         if (!in_pm)
 112                 fn = usbnet_write_cmd;
 113         else
 114                 fn = usbnet_write_cmd_nopm;
 115
 116         buf = data;
 117         cpu_to_le32s(&buf);
 118
 119         ret = fn(dev, USB_VENDOR_REQUEST_WRITE_REGISTER, USB_DIR_OUT
 120                  | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 121                  0, index, &buf, 4);
 122         if (unlikely(ret < 0))
 123                 netdev_warn(dev->net, "Failed to write reg index 0x%08x: %d\n",
 124                             index, ret);
 125
 126         return ret;
 127 }
 128
 129 static int __must_check smsc95xx_read_reg_nopm(struct usbnet *dev, u32 index,
 130                                                u32 *data)
 131 {
 132         return __smsc95xx_read_reg(dev, index, data, 1);
 133 }
 134
 135 static int __must_check smsc95xx_write_reg_nopm(struct usbnet *dev, u32 index,
 136                                                 u32 data)
 137 {
 138         return __smsc95xx_write_reg(dev, index, data, 1);
 139 }
 140
 141 static int __must_check smsc95xx_read_reg(struct usbnet *dev, u32 index,
 142                                           u32 *data)
 143 {
 144         return __smsc95xx_read_reg(dev, index, data, 0);
 145 }
 146
 147 static int __must_check smsc95xx_write_reg(struct usbnet *dev, u32 index,
 148                                            u32 data)
 149 {
 150         return __smsc95xx_write_reg(dev, index, data, 0);
 151 }
 152
 153 /* Loop until the read is completed with timeout
 154  * called with phy_mutex held */
 155 static int __must_check __smsc95xx_phy_wait_not_busy(struct usbnet *dev,
 156                                                      int in_pm)
 157 {
 158         unsigned long start_time = jiffies;
 159         u32 val;
 160         int ret;
 161
 162         do {
 163                 ret = __smsc95xx_read_reg(dev, MII_ADDR, &val, in_pm);
 164                 if (ret < 0) {
 165                         netdev_warn(dev->net, "Error reading MII_ACCESS\n");
 166                         return ret;
 167                 }
 168
 169                 if (!(val & MII_BUSY_))
 170                         return 0;
 171         } while (!time_after(jiffies, start_time + HZ));
 172
 173         return -EIO;
 174 }
 175
 176 static int __smsc95xx_mdio_read(struct net_device *netdev, int phy_id, int idx,
 177                                 int in_pm)
 178 {
 179         struct usbnet *dev = netdev_priv(netdev);
 180         u32 val, addr;
 181         int ret;
 182
 183         mutex_lock(&dev->phy_mutex);
 184
 185         /* confirm MII not busy */
 186         ret = __smsc95xx_phy_wait_not_busy(dev, in_pm);
 187         if (ret < 0) {
 188                 netdev_warn(dev->net, "MII is busy in smsc95xx_mdio_read\n");
 189                 goto done;
 190         }
 191
 192         /* set the address, index & direction (read from PHY) */
 193         phy_id &= dev->mii.phy_id_mask;
 194         idx &= dev->mii.reg_num_mask;
 195         addr = (phy_id << 11) | (idx << 6) | MII_READ_ | MII_BUSY_;
 196         ret = __smsc95xx_write_reg(dev, MII_ADDR, addr, in_pm);
 197         if (ret < 0) {
 198                 netdev_warn(dev->net, "Error writing MII_ADDR\n");
 199                 goto done;
 200         }
 201
 202         ret = __smsc95xx_phy_wait_not_busy(dev, in_pm);
 203         if (ret < 0) {
 204                 netdev_warn(dev->net, "Timed out reading MII reg %02X\n", idx);
 205                 goto done;
 206         }
 207
 208         ret = __smsc95xx_read_reg(dev, MII_DATA, &val, in_pm);
 209         if (ret < 0) {
 210                 netdev_warn(dev->net, "Error reading MII_DATA\n");
 211                 goto done;
 212         }
 213
 214         ret = (u16)(val & 0xFFFF);
 215
 216 done:
 217         mutex_unlock(&dev->phy_mutex);
 218         return ret;
 219 }
 220
 221 static void __smsc95xx_mdio_write(struct net_device *netdev, int phy_id,
 222                                   int idx, int regval, int in_pm)
 223 {
 224         struct usbnet *dev = netdev_priv(netdev);
 225         u32 val, addr;
 226         int ret;
 227
 228         mutex_lock(&dev->phy_mutex);
 229
 230         /* confirm MII not busy */
 231         ret = __smsc95xx_phy_wait_not_busy(dev, in_pm);
 232         if (ret < 0) {
 233                 netdev_warn(dev->net, "MII is busy in smsc95xx_mdio_write\n");
 234                 goto done;
 235         }
 236
 237         val = regval;
 238         ret = __smsc95xx_write_reg(dev, MII_DATA, val, in_pm);
 239         if (ret < 0) {
 240                 netdev_warn(dev->net, "Error writing MII_DATA\n");
 241                 goto done;
 242         }
 243
 244         /* set the address, index & direction (write to PHY) */
 245         phy_id &= dev->mii.phy_id_mask;
 246         idx &= dev->mii.reg_num_mask;
 247         addr = (phy_id << 11) | (idx << 6) | MII_WRITE_ | MII_BUSY_;
 248         ret = __smsc95xx_write_reg(dev, MII_ADDR, addr, in_pm);
 249         if (ret < 0) {
 250                 netdev_warn(dev->net, "Error writing MII_ADDR\n");
 251                 goto done;
 252         }
 253
 254         ret = __smsc95xx_phy_wait_not_busy(dev, in_pm);
 255         if (ret < 0) {
 256                 netdev_warn(dev->net, "Timed out writing MII reg %02X\n", idx);
 257                 goto done;
 258         }
 259
 260 done:
 261         mutex_unlock(&dev->phy_mutex);
 262 }
 263
 264 static int smsc95xx_mdio_read_nopm(struct net_device *netdev, int phy_id,
 265                                    int idx)
 266 {
 267         return __smsc95xx_mdio_read(netdev, phy_id, idx, 1);
 268 }
 269
 270 static void smsc95xx_mdio_write_nopm(struct net_device *netdev, int phy_id,
 271                                      int idx, int regval)
 272 {
 273         __smsc95xx_mdio_write(netdev, phy_id, idx, regval, 1);
 274 }
 275
 276 static int smsc95xx_mdio_read(struct net_device *netdev, int phy_id, int idx)
 277 {
 278         return __smsc95xx_mdio_read(netdev, phy_id, idx, 0);
 279 }
 280
 281 static void smsc95xx_mdio_write(struct net_device *netdev, int phy_id, int idx,
 282                                 int regval)
 283 {
 284         __smsc95xx_mdio_write(netdev, phy_id, idx, regval, 0);
 285 }
 286
 287 static int __must_check smsc95xx_wait_eeprom(struct usbnet *dev)
 288 {
 289         unsigned long start_time = jiffies;
 290         u32 val;
 291         int ret;
 292
 293         do {
 294                 ret = smsc95xx_read_reg(dev, E2P_CMD, &val);
 295                 if (ret < 0) {
 296                         netdev_warn(dev->net, "Error reading E2P_CMD\n");
 297                         return ret;
 298                 }
 299
 300                 if (!(val & E2P_CMD_BUSY_) || (val & E2P_CMD_TIMEOUT_))
 301                         break;
 302                 udelay(40);
 303         } while (!time_after(jiffies, start_time + HZ));
 304
 305         if (val & (E2P_CMD_TIMEOUT_ | E2P_CMD_BUSY_)) {
 306                 netdev_warn(dev->net, "EEPROM read operation timeout\n");
 307                 return -EIO;
 308         }
 309
 310         return 0;
 311 }
 312
 313 static int __must_check smsc95xx_eeprom_confirm_not_busy(struct usbnet *dev)
 314 {
 315         unsigned long start_time = jiffies;
 316         u32 val;
 317         int ret;
 318
 319         do {
 320                 ret = smsc95xx_read_reg(dev, E2P_CMD, &val);
 321                 if (ret < 0) {
 322                         netdev_warn(dev->net, "Error reading E2P_CMD\n");
 323                         return ret;
 324                 }
 325
 326                 if (!(val & E2P_CMD_BUSY_))
 327                         return 0;
 328
 329                 udelay(40);
 330         } while (!time_after(jiffies, start_time + HZ));
 331
 332         netdev_warn(dev->net, "EEPROM is busy\n");
 333         return -EIO;
 334 }
 335
 336 static int smsc95xx_read_eeprom(struct usbnet *dev, u32 offset, u32 length,
 337                                 u8 *data)
 338 {
 339         u32 val;
 340         int i, ret;
 341
 342         BUG_ON(!dev);
 343         BUG_ON(!data);
 344
 345         ret = smsc95xx_eeprom_confirm_not_busy(dev);
 346         if (ret)
 347                 return ret;
 348
 349         for (i = 0; i < length; i++) {
 350                 val = E2P_CMD_BUSY_ | E2P_CMD_READ_ | (offset & E2P_CMD_ADDR_);
 351                 ret = smsc95xx_write_reg(dev, E2P_CMD, val);
 352                 if (ret < 0) {
 353                         netdev_warn(dev->net, "Error writing E2P_CMD\n");
 354                         return ret;
 355                 }
 356
 357                 ret = smsc95xx_wait_eeprom(dev);
 358                 if (ret < 0)
 359                         return ret;
 360
 361                 ret = smsc95xx_read_reg(dev, E2P_DATA, &val);
 362                 if (ret < 0) {
 363                         netdev_warn(dev->net, "Error reading E2P_DATA\n");
 364                         return ret;
 365                 }
 366
 367                 data[i] = val & 0xFF;
 368                 offset++;
 369         }
 370
 371         return 0;
 372 }
 373
 374 static int smsc95xx_write_eeprom(struct usbnet *dev, u32 offset, u32 length,
 375                                  u8 *data)
 376 {
 377         u32 val;
 378         int i, ret;
 379
 380         BUG_ON(!dev);
 381         BUG_ON(!data);
 382
 383         ret = smsc95xx_eeprom_confirm_not_busy(dev);
 384         if (ret)
 385                 return ret;
 386
 387         /* Issue write/erase enable command */
 388         val = E2P_CMD_BUSY_ | E2P_CMD_EWEN_;
 389         ret = smsc95xx_write_reg(dev, E2P_CMD, val);
 390         if (ret < 0) {
 391                 netdev_warn(dev->net, "Error writing E2P_DATA\n");
 392                 return ret;
 393         }
 394
 395         ret = smsc95xx_wait_eeprom(dev);
 396         if (ret < 0)
 397                 return ret;
 398
 399         for (i = 0; i < length; i++) {
 400
 401                 /* Fill data register */
 402                 val = data[i];
 403                 ret = smsc95xx_write_reg(dev, E2P_DATA, val);
 404                 if (ret < 0) {
 405                         netdev_warn(dev->net, "Error writing E2P_DATA\n");
 406                         return ret;
 407                 }
 408
 409                 /* Send "write" command */
 410                 val = E2P_CMD_BUSY_ | E2P_CMD_WRITE_ | (offset & E2P_CMD_ADDR_);
 411                 ret = smsc95xx_write_reg(dev, E2P_CMD, val);
 412                 if (ret < 0) {
 413                         netdev_warn(dev->net, "Error writing E2P_CMD\n");
 414                         return ret;
 415                 }
 416
 417                 ret = smsc95xx_wait_eeprom(dev);
 418                 if (ret < 0)
 419                         return ret;
 420
 421                 offset++;
 422         }
 423
 424         return 0;
 425 }
 426
 427 static int __must_check smsc95xx_write_reg_async(struct usbnet *dev, u16 index,
 428                                                  u32 data)
 429 {
 430         const u16 size = 4;
 431         u32 buf;
 432         int ret;
 433
 434         buf = data;
 435         cpu_to_le32s(&buf);
 436
 437         ret = usbnet_write_cmd_async(dev, USB_VENDOR_REQUEST_WRITE_REGISTER,
 438                                      USB_DIR_OUT | USB_TYPE_VENDOR |
 439                                      USB_RECIP_DEVICE,
 440                                      0, index, &buf, size);
 441         if (ret < 0)
 442                 netdev_warn(dev->net, "Error write async cmd, sts=%d\n",
 443                             ret);
 444         return ret;
 445 }
 446
 447 /* returns hash bit number for given MAC address
 448  * example:
 449  * 01 00 5E 00 00 01 -> returns bit number 31 */
 450 static unsigned int smsc95xx_hash(char addr[ETH_ALEN])
 451 {
 452         return (ether_crc(ETH_ALEN, addr) >> 26) & 0x3f;
 453 }
 454
 455 static void smsc95xx_set_multicast(struct net_device *netdev)
 456 {
 457         struct usbnet *dev = netdev_priv(netdev);
 458         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
 459         unsigned long flags;
 460         int ret;
 461
 462         pdata->hash_hi = 0;
 463         pdata->hash_lo = 0;
 464
 465         spin_lock_irqsave(&pdata->mac_cr_lock, flags);
 466
 467         if (dev->net->flags & IFF_PROMISC) {
 468                 netif_dbg(dev, drv, dev->net, "promiscuous mode enabled\n");
 469                 pdata->mac_cr |= MAC_CR_PRMS_;
 470                 pdata->mac_cr &= ~(MAC_CR_MCPAS_ | MAC_CR_HPFILT_);
 471         } else if (dev->net->flags & IFF_ALLMULTI) {
 472                 netif_dbg(dev, drv, dev->net, "receive all multicast enabled\n");
 473                 pdata->mac_cr |= MAC_CR_MCPAS_;
 474                 pdata->mac_cr &= ~(MAC_CR_PRMS_ | MAC_CR_HPFILT_);
 475         } else if (!netdev_mc_empty(dev->net)) {
 476                 struct netdev_hw_addr *ha;
 477
 478                 pdata->mac_cr |= MAC_CR_HPFILT_;
 479                 pdata->mac_cr &= ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_);
 480
 481                 netdev_for_each_mc_addr(ha, netdev) {
 482                         u32 bitnum = smsc95xx_hash(ha->addr);
 483                         u32 mask = 0x01 << (bitnum & 0x1F);
 484                         if (bitnum & 0x20)
 485                                 pdata->hash_hi |= mask;
 486                         else
 487                                 pdata->hash_lo |= mask;
 488                 }
 489
 490                 netif_dbg(dev, drv, dev->net, "HASHH=0x%08X, HASHL=0x%08X\n",
 491                                    pdata->hash_hi, pdata->hash_lo);
 492         } else {
 493                 netif_dbg(dev, drv, dev->net, "receive own packets only\n");
 494                 pdata->mac_cr &=
 495                         ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_ | MAC_CR_HPFILT_);
 496         }
 497
 498         spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
 499
 500         /* Initiate async writes, as we can't wait for completion here */
 501         ret = smsc95xx_write_reg_async(dev, HASHH, pdata->hash_hi);
 502         if (ret < 0)
 503                 netdev_warn(dev->net, "failed to initiate async write to HASHH\n");
 504
 505         ret = smsc95xx_write_reg_async(dev, HASHL, pdata->hash_lo);
 506         if (ret < 0)
 507                 netdev_warn(dev->net, "failed to initiate async write to HASHL\n");
 508
 509         ret = smsc95xx_write_reg_async(dev, MAC_CR, pdata->mac_cr);
 510         if (ret < 0)
 511                 netdev_warn(dev->net, "failed to initiate async write to MAC_CR\n");
 512 }
 513
 514 static int smsc95xx_phy_update_flowcontrol(struct usbnet *dev, u8 duplex,
 515                                            u16 lcladv, u16 rmtadv)
 516 {
 517         u32 flow = 0, afc_cfg;
 518
 519         int ret = smsc95xx_read_reg(dev, AFC_CFG, &afc_cfg);
 520         if (ret < 0)
 521                 return ret;
 522
 523         if (duplex == DUPLEX_FULL) {
 524                 u8 cap = mii_resolve_flowctrl_fdx(lcladv, rmtadv);
 525
 526                 if (cap & FLOW_CTRL_RX)
 527                         flow = 0xFFFF0002;
 528
 529                 if (cap & FLOW_CTRL_TX) {
 530                         afc_cfg |= 0xF;
 531                         flow |= 0xFFFF0000;
 532                 } else {
 533                         afc_cfg &= ~0xF;
 534                 }
 535
 536                 netif_dbg(dev, link, dev->net, "rx pause %s, tx pause %s\n",
 537                                    cap & FLOW_CTRL_RX ? "enabled" : "disabled",
 538                                    cap & FLOW_CTRL_TX ? "enabled" : "disabled");
 539         } else {
 540                 netif_dbg(dev, link, dev->net, "half duplex\n");
 541                 afc_cfg |= 0xF;
 542         }
 543
 544         ret = smsc95xx_write_reg(dev, FLOW, flow);
 545         if (ret < 0)
 546                 return ret;
 547
 548         return smsc95xx_write_reg(dev, AFC_CFG, afc_cfg);
 549 }
 550
 551 static int smsc95xx_link_reset(struct usbnet *dev)
 552 {
 553         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
 554         struct mii_if_info *mii = &dev->mii;
 555         struct ethtool_cmd ecmd = { .cmd = ETHTOOL_GSET };
 556         unsigned long flags;
 557         u16 lcladv, rmtadv;
 558         int ret;
 559
 560         /* clear interrupt status */
 561         ret = smsc95xx_mdio_read(dev->net, mii->phy_id, PHY_INT_SRC);
 562         if (ret < 0)
 563                 return ret;
 564
 565         ret = smsc95xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL_);
 566         if (ret < 0)
 567                 return ret;
 568
 569         mii_check_media(mii, 1, 1);
 570         mii_ethtool_gset(&dev->mii, &ecmd);
 571         lcladv = smsc95xx_mdio_read(dev->net, mii->phy_id, MII_ADVERTISE);
 572         rmtadv = smsc95xx_mdio_read(dev->net, mii->phy_id, MII_LPA);
 573
 574         netif_dbg(dev, link, dev->net,
 575                   "speed: %u duplex: %d lcladv: %04x rmtadv: %04x\n",
 576                   ethtool_cmd_speed(&ecmd), ecmd.duplex, lcladv, rmtadv);
 577
 578         spin_lock_irqsave(&pdata->mac_cr_lock, flags);
 579         if (ecmd.duplex != DUPLEX_FULL) {
 580                 pdata->mac_cr &= ~MAC_CR_FDPX_;
 581                 pdata->mac_cr |= MAC_CR_RCVOWN_;
 582         } else {
 583                 pdata->mac_cr &= ~MAC_CR_RCVOWN_;
 584                 pdata->mac_cr |= MAC_CR_FDPX_;
 585         }
 586         spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
 587
 588         ret = smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr);
 589         if (ret < 0)
 590                 return ret;
 591
 592         ret = smsc95xx_phy_update_flowcontrol(dev, ecmd.duplex, lcladv, rmtadv);
 593         if (ret < 0)
 594                 netdev_warn(dev->net, "Error updating PHY flow control\n");
 595
 596         return ret;
 597 }
 598
 599 static void smsc95xx_status(struct usbnet *dev, struct urb *urb)
 600 {
 601         u32 intdata;
 602
 603         if (urb->actual_length != 4) {
 604                 netdev_warn(dev->net, "unexpected urb length %d\n",
 605                             urb->actual_length);
 606                 return;
 607         }
 608
 609         intdata = get_unaligned_le32(urb->transfer_buffer);
 610         netif_dbg(dev, link, dev->net, "intdata: 0x%08X\n", intdata);
 611
 612         if (intdata & INT_ENP_PHY_INT_)
 613                 usbnet_defer_kevent(dev, EVENT_LINK_RESET);
 614         else
 615                 netdev_warn(dev->net, "unexpected interrupt, intdata=0x%08X\n",
 616                             intdata);
 617 }
 618
 619 static void set_carrier(struct usbnet *dev, bool link)
 620 {
 621         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
 622
 623         if (pdata->link_ok == link)
 624                 return;
 625
 626         pdata->link_ok = link;
 627
 628         if (link)
 629                 usbnet_link_change(dev, 1, 0);
 630         else
 631                 usbnet_link_change(dev, 0, 0);
 632 }
 633
 634 static void check_carrier(struct work_struct *work)
 635 {
 636         struct smsc95xx_priv *pdata = container_of(work, struct smsc95xx_priv,
 637                                                 carrier_check.work);
 638         struct usbnet *dev = pdata->dev;
 639         int ret;
 640
 641         if (pdata->suspend_flags != 0)
 642                 return;
 643
 644         ret = smsc95xx_mdio_read(dev->net, dev->mii.phy_id, MII_BMSR);
 645         if (ret < 0) {
 646                 netdev_warn(dev->net, "Failed to read MII_BMSR\n");
 647                 return;
 648         }
 649         if (ret & BMSR_LSTATUS)
 650                 set_carrier(dev, 1);
 651         else
 652                 set_carrier(dev, 0);
 653
 654         schedule_delayed_work(&pdata->carrier_check, CARRIER_CHECK_DELAY);
 655 }
 656
 657 /* Enable or disable Tx & Rx checksum offload engines */
 658 static int smsc95xx_set_features(struct net_device *netdev,
 659         netdev_features_t features)
 660 {
 661         struct usbnet *dev = netdev_priv(netdev);
 662         u32 read_buf;
 663         int ret;
 664
 665         ret = smsc95xx_read_reg(dev, COE_CR, &read_buf);
 666         if (ret < 0)
 667                 return ret;
 668
 669         if (features & NETIF_F_IP_CSUM)
 670                 read_buf |= Tx_COE_EN_;
 671         else
 672                 read_buf &= ~Tx_COE_EN_;
 673
 674         if (features & NETIF_F_RXCSUM)
 675                 read_buf |= Rx_COE_EN_;
 676         else
 677                 read_buf &= ~Rx_COE_EN_;
 678
 679         ret = smsc95xx_write_reg(dev, COE_CR, read_buf);
 680         if (ret < 0)
 681                 return ret;
 682
 683         netif_dbg(dev, hw, dev->net, "COE_CR = 0x%08x\n", read_buf);
 684         return 0;
 685 }
 686
 687 static int smsc95xx_ethtool_get_eeprom_len(struct net_device *net)
 688 {
 689         return MAX_EEPROM_SIZE;
 690 }
 691
 692 static int smsc95xx_ethtool_get_eeprom(struct net_device *netdev,
 693                                        struct ethtool_eeprom *ee, u8 *data)
 694 {
 695         struct usbnet *dev = netdev_priv(netdev);
 696
 697         ee->magic = LAN95XX_EEPROM_MAGIC;
 698
 699         return smsc95xx_read_eeprom(dev, ee->offset, ee->len, data);
 700 }
 701
 702 static int smsc95xx_ethtool_set_eeprom(struct net_device *netdev,
 703                                        struct ethtool_eeprom *ee, u8 *data)
 704 {
 705         struct usbnet *dev = netdev_priv(netdev);
 706
 707         if (ee->magic != LAN95XX_EEPROM_MAGIC) {
 708                 netdev_warn(dev->net, "EEPROM: magic value mismatch, magic = 0x%x\n",
 709                             ee->magic);
 710                 return -EINVAL;
 711         }
 712
 713         return smsc95xx_write_eeprom(dev, ee->offset, ee->len, data);
 714 }
 715
 716 static int smsc95xx_ethtool_getregslen(struct net_device *netdev)
 717 {
 718         /* all smsc95xx registers */
 719         return COE_CR - ID_REV + sizeof(u32);
 720 }
 721
 722 static void
 723 smsc95xx_ethtool_getregs(struct net_device *netdev, struct ethtool_regs *regs,
 724                          void *buf)
 725 {
 726         struct usbnet *dev = netdev_priv(netdev);
 727         unsigned int i, j;
 728         int retval;
 729         u32 *data = buf;
 730
 731         retval = smsc95xx_read_reg(dev, ID_REV, &regs->version);
 732         if (retval < 0) {
 733                 netdev_warn(netdev, "REGS: cannot read ID_REV\n");
 734                 return;
 735         }
 736
 737         for (i = ID_REV, j = 0; i <= COE_CR; i += (sizeof(u32)), j++) {
 738                 retval = smsc95xx_read_reg(dev, i, &data[j]);
 739                 if (retval < 0) {
 740                         netdev_warn(netdev, "REGS: cannot read reg[%x]\n", i);
 741                         return;
 742                 }
 743         }
 744 }
 745
 746 static void smsc95xx_ethtool_get_wol(struct net_device *net,
 747                                      struct ethtool_wolinfo *wolinfo)
 748 {
 749         struct usbnet *dev = netdev_priv(net);
 750         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
 751
 752         wolinfo->supported = SUPPORTED_WAKE;
 753         wolinfo->wolopts = pdata->wolopts;
 754 }
 755
 756 static int smsc95xx_ethtool_set_wol(struct net_device *net,
 757                                     struct ethtool_wolinfo *wolinfo)
 758 {
 759         struct usbnet *dev = netdev_priv(net);
 760         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
 761         int ret;
 762
 763         if (wolinfo->wolopts & ~SUPPORTED_WAKE)
 764                 return -EINVAL;
 765
 766         pdata->wolopts = wolinfo->wolopts & SUPPORTED_WAKE;
 767
 768         ret = device_set_wakeup_enable(&dev->udev->dev, pdata->wolopts);
 769         if (ret < 0)
 770                 netdev_warn(dev->net, "device_set_wakeup_enable error %d\n", ret);
 771
 772         return ret;
 773 }
 774
 775 static int get_mdix_status(struct net_device *net)
 776 {
 777         struct usbnet *dev = netdev_priv(net);
 778         u32 val;
 779         int buf;
 780
 781         buf = smsc95xx_mdio_read(dev->net, dev->mii.phy_id, SPECIAL_CTRL_STS);
 782         if (buf & SPECIAL_CTRL_STS_OVRRD_AMDIX_) {
 783                 if (buf & SPECIAL_CTRL_STS_AMDIX_ENABLE_)
 784                         return ETH_TP_MDI_AUTO;
 785                 else if (buf & SPECIAL_CTRL_STS_AMDIX_STATE_)
 786                         return ETH_TP_MDI_X;
 787         } else {
 788                 buf = smsc95xx_read_reg(dev, STRAP_STATUS, &val);
 789                 if (val & STRAP_STATUS_AMDIX_EN_)
 790                         return ETH_TP_MDI_AUTO;
 791         }
 792
 793         return ETH_TP_MDI;
 794 }
 795
 796 static void set_mdix_status(struct net_device *net, __u8 mdix_ctrl)
 797 {
 798         struct usbnet *dev = netdev_priv(net);
 799         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
 800         int buf;
 801
 802         if ((pdata->chip_id == ID_REV_CHIP_ID_9500A_) ||
 803             (pdata->chip_id == ID_REV_CHIP_ID_9530_) ||
 804             (pdata->chip_id == ID_REV_CHIP_ID_89530_) ||
 805             (pdata->chip_id == ID_REV_CHIP_ID_9730_)) {
 806                 /* Extend Manual AutoMDIX timer for 9500A/9500Ai */
 807                 buf = smsc95xx_mdio_read(dev->net, dev->mii.phy_id,
 808                                          PHY_EDPD_CONFIG);
 809                 buf |= PHY_EDPD_CONFIG_EXT_CROSSOVER_;
 810                 smsc95xx_mdio_write(dev->net, dev->mii.phy_id,
 811                                     PHY_EDPD_CONFIG, buf);
 812         }
 813
 814         if (mdix_ctrl == ETH_TP_MDI) {
 815                 buf = smsc95xx_mdio_read(dev->net, dev->mii.phy_id,
 816                                          SPECIAL_CTRL_STS);
 817                 buf |= SPECIAL_CTRL_STS_OVRRD_AMDIX_;
 818                 buf &= ~(SPECIAL_CTRL_STS_AMDIX_ENABLE_ |
 819                          SPECIAL_CTRL_STS_AMDIX_STATE_);
 820                 smsc95xx_mdio_write(dev->net, dev->mii.phy_id,
 821                                     SPECIAL_CTRL_STS, buf);
 822         } else if (mdix_ctrl == ETH_TP_MDI_X) {
 823                 buf = smsc95xx_mdio_read(dev->net, dev->mii.phy_id,
 824                                          SPECIAL_CTRL_STS);
 825                 buf |= SPECIAL_CTRL_STS_OVRRD_AMDIX_;
 826                 buf &= ~(SPECIAL_CTRL_STS_AMDIX_ENABLE_ |
 827                          SPECIAL_CTRL_STS_AMDIX_STATE_);
 828                 buf |= SPECIAL_CTRL_STS_AMDIX_STATE_;
 829                 smsc95xx_mdio_write(dev->net, dev->mii.phy_id,
 830                                     SPECIAL_CTRL_STS, buf);
 831         } else if (mdix_ctrl == ETH_TP_MDI_AUTO) {
 832                 buf = smsc95xx_mdio_read(dev->net, dev->mii.phy_id,
 833                                          SPECIAL_CTRL_STS);
 834                 buf &= ~SPECIAL_CTRL_STS_OVRRD_AMDIX_;
 835                 buf &= ~(SPECIAL_CTRL_STS_AMDIX_ENABLE_ |
 836                          SPECIAL_CTRL_STS_AMDIX_STATE_);
 837                 buf |= SPECIAL_CTRL_STS_AMDIX_ENABLE_;
 838                 smsc95xx_mdio_write(dev->net, dev->mii.phy_id,
 839                                     SPECIAL_CTRL_STS, buf);
 840         }
 841         pdata->mdix_ctrl = mdix_ctrl;
 842 }
 843
 844 static int smsc95xx_get_link_ksettings(struct net_device *net,
 845                                        struct ethtool_link_ksettings *cmd)
 846 {
 847         struct usbnet *dev = netdev_priv(net);
 848         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
 849         int retval;
 850
 851         retval = usbnet_get_link_ksettings(net, cmd);
 852
 853         cmd->base.eth_tp_mdix = pdata->mdix_ctrl;
 854         cmd->base.eth_tp_mdix_ctrl = pdata->mdix_ctrl;
 855
 856         return retval;
 857 }
 858
 859 static int smsc95xx_set_link_ksettings(struct net_device *net,
 860                                        const struct ethtool_link_ksettings *cmd)
 861 {
 862         struct usbnet *dev = netdev_priv(net);
 863         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
 864         int retval;
 865
 866         if (pdata->mdix_ctrl != cmd->base.eth_tp_mdix_ctrl)
 867                 set_mdix_status(net, cmd->base.eth_tp_mdix_ctrl);
 868
 869         retval = usbnet_set_link_ksettings(net, cmd);
 870
 871         return retval;
 872 }
 873
 874 static const struct ethtool_ops smsc95xx_ethtool_ops = {
 875         .get_link       = usbnet_get_link,
 876         .nway_reset     = usbnet_nway_reset,
 877         .get_drvinfo    = usbnet_get_drvinfo,
 878         .get_msglevel   = usbnet_get_msglevel,
 879         .set_msglevel   = usbnet_set_msglevel,
 880         .get_eeprom_len = smsc95xx_ethtool_get_eeprom_len,
 881         .get_eeprom     = smsc95xx_ethtool_get_eeprom,
 882         .set_eeprom     = smsc95xx_ethtool_set_eeprom,
 883         .get_regs_len   = smsc95xx_ethtool_getregslen,
 884         .get_regs       = smsc95xx_ethtool_getregs,
 885         .get_wol        = smsc95xx_ethtool_get_wol,
 886         .set_wol        = smsc95xx_ethtool_set_wol,
 887         .get_link_ksettings     = smsc95xx_get_link_ksettings,
 888         .set_link_ksettings     = smsc95xx_set_link_ksettings,
 889         .get_ts_info    = ethtool_op_get_ts_info,
 890 };
 891
 892 static int smsc95xx_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
 893 {
 894         struct usbnet *dev = netdev_priv(netdev);
 895
 896         if (!netif_running(netdev))
 897                 return -EINVAL;
 898
 899         return generic_mii_ioctl(&dev->mii, if_mii(rq), cmd, NULL);
 900 }
 901
 902 static void smsc95xx_init_mac_address(struct usbnet *dev)
 903 {
 904         const u8 *mac_addr;
 905
 906         /* maybe the boot loader passed the MAC address in devicetree */
 907         mac_addr = of_get_mac_address(dev->udev->dev.of_node);
 908         if (!IS_ERR(mac_addr)) {
 909                 ether_addr_copy(dev->net->dev_addr, mac_addr);
 910                 return;
 911         }
 912
 913         /* try reading mac address from EEPROM */
 914         if (smsc95xx_read_eeprom(dev, EEPROM_MAC_OFFSET, ETH_ALEN,
 915                         dev->net->dev_addr) == 0) {
 916                 if (is_valid_ether_addr(dev->net->dev_addr)) {
 917                         /* eeprom values are valid so use them */
 918                         netif_dbg(dev, ifup, dev->net, "MAC address read from EEPROM\n");
 919                         return;
 920                 }
 921         }
 922
 923         /* no useful static MAC address found. generate a random one */
 924         eth_hw_addr_random(dev->net);
 925         netif_dbg(dev, ifup, dev->net, "MAC address set to eth_random_addr\n");
 926 }
 927
 928 static int smsc95xx_set_mac_address(struct usbnet *dev)
 929 {
 930         u32 addr_lo = dev->net->dev_addr[0] | dev->net->dev_addr[1] << 8 |
 931                 dev->net->dev_addr[2] << 16 | dev->net->dev_addr[3] << 24;
 932         u32 addr_hi = dev->net->dev_addr[4] | dev->net->dev_addr[5] << 8;
 933         int ret;
 934
 935         ret = smsc95xx_write_reg(dev, ADDRL, addr_lo);
 936         if (ret < 0)
 937                 return ret;
 938
 939         return smsc95xx_write_reg(dev, ADDRH, addr_hi);
 940 }
 941
 942 /* starts the TX path */
 943 static int smsc95xx_start_tx_path(struct usbnet *dev)
 944 {
 945         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
 946         unsigned long flags;
 947         int ret;
 948
 949         /* Enable Tx at MAC */
 950         spin_lock_irqsave(&pdata->mac_cr_lock, flags);
 951         pdata->mac_cr |= MAC_CR_TXEN_;
 952         spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
 953
 954         ret = smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr);
 955         if (ret < 0)
 956                 return ret;
 957
 958         /* Enable Tx at SCSRs */
 959         return smsc95xx_write_reg(dev, TX_CFG, TX_CFG_ON_);
 960 }
 961
 962 /* Starts the Receive path */
 963 static int smsc95xx_start_rx_path(struct usbnet *dev, int in_pm)
 964 {
 965         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
 966         unsigned long flags;
 967
 968         spin_lock_irqsave(&pdata->mac_cr_lock, flags);
 969         pdata->mac_cr |= MAC_CR_RXEN_;
 970         spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
 971
 972         return __smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr, in_pm);
 973 }
 974
 975 static int smsc95xx_phy_initialize(struct usbnet *dev)
 976 {
 977         int bmcr, ret, timeout = 0;
 978
 979         /* Initialize MII structure */
 980         dev->mii.dev = dev->net;
 981         dev->mii.mdio_read = smsc95xx_mdio_read;
 982         dev->mii.mdio_write = smsc95xx_mdio_write;
 983         dev->mii.phy_id_mask = 0x1f;
 984         dev->mii.reg_num_mask = 0x1f;
 985         dev->mii.phy_id = SMSC95XX_INTERNAL_PHY_ID;
 986
 987         /* reset phy and wait for reset to complete */
 988         smsc95xx_mdio_write(dev->net, dev->mii.phy_id, MII_BMCR, BMCR_RESET);
 989
 990         do {
 991                 msleep(10);
 992                 bmcr = smsc95xx_mdio_read(dev->net, dev->mii.phy_id, MII_BMCR);
 993                 timeout++;
 994         } while ((bmcr & BMCR_RESET) && (timeout < 100));
 995
 996         if (timeout >= 100) {
 997                 netdev_warn(dev->net, "timeout on PHY Reset");
 998                 return -EIO;
 999         }
1000
1001         smsc95xx_mdio_write(dev->net, dev->mii.phy_id, MII_ADVERTISE,
1002                 ADVERTISE_ALL | ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP |
1003                 ADVERTISE_PAUSE_ASYM);
1004
1005         /* read to clear */
1006         ret = smsc95xx_mdio_read(dev->net, dev->mii.phy_id, PHY_INT_SRC);
1007         if (ret < 0) {
1008                 netdev_warn(dev->net, "Failed to read PHY_INT_SRC during init\n");
1009                 return ret;
1010         }
1011
1012         smsc95xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_MASK,
1013                 PHY_INT_MASK_DEFAULT_);
1014         mii_nway_restart(&dev->mii);
1015
1016         netif_dbg(dev, ifup, dev->net, "phy initialised successfully\n");
1017         return 0;
1018 }
1019
1020 static int smsc95xx_reset(struct usbnet *dev)
1021 {
1022         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1023         u32 read_buf, write_buf, burst_cap;
1024         int ret = 0, timeout;
1025
1026         netif_dbg(dev, ifup, dev->net, "entering smsc95xx_reset\n");
1027
1028         ret = smsc95xx_write_reg(dev, HW_CFG, HW_CFG_LRST_);
1029         if (ret < 0)
1030                 return ret;
1031
1032         timeout = 0;
1033         do {
1034                 msleep(10);
1035                 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
1036                 if (ret < 0)
1037                         return ret;
1038                 timeout++;
1039         } while ((read_buf & HW_CFG_LRST_) && (timeout < 100));
1040
1041         if (timeout >= 100) {
1042                 netdev_warn(dev->net, "timeout waiting for completion of Lite Reset\n");
1043                 return ret;
1044         }
1045
1046         ret = smsc95xx_write_reg(dev, PM_CTRL, PM_CTL_PHY_RST_);
1047         if (ret < 0)
1048                 return ret;
1049
1050         timeout = 0;
1051         do {
1052                 msleep(10);
1053                 ret = smsc95xx_read_reg(dev, PM_CTRL, &read_buf);
1054                 if (ret < 0)
1055                         return ret;
1056                 timeout++;
1057         } while ((read_buf & PM_CTL_PHY_RST_) && (timeout < 100));
1058
1059         if (timeout >= 100) {
1060                 netdev_warn(dev->net, "timeout waiting for PHY Reset\n");
1061                 return ret;
1062         }
1063
1064         ret = smsc95xx_set_mac_address(dev);
1065         if (ret < 0)
1066                 return ret;
1067
1068         netif_dbg(dev, ifup, dev->net, "MAC Address: %pM\n",
1069                   dev->net->dev_addr);
1070
1071         ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
1072         if (ret < 0)
1073                 return ret;
1074
1075         netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG : 0x%08x\n",
1076                   read_buf);
1077
1078         read_buf |= HW_CFG_BIR_;
1079
1080         ret = smsc95xx_write_reg(dev, HW_CFG, read_buf);
1081         if (ret < 0)
1082                 return ret;
1083
1084         ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
1085         if (ret < 0)
1086                 return ret;
1087
1088         netif_dbg(dev, ifup, dev->net,
1089                   "Read Value from HW_CFG after writing HW_CFG_BIR_: 0x%08x\n",
1090                   read_buf);
1091
1092         if (!turbo_mode) {
1093                 burst_cap = 0;
1094                 dev->rx_urb_size = MAX_SINGLE_PACKET_SIZE;
1095         } else if (dev->udev->speed == USB_SPEED_HIGH) {
1096                 burst_cap = DEFAULT_HS_BURST_CAP_SIZE / HS_USB_PKT_SIZE;
1097                 dev->rx_urb_size = DEFAULT_HS_BURST_CAP_SIZE;
1098         } else {
1099                 burst_cap = DEFAULT_FS_BURST_CAP_SIZE / FS_USB_PKT_SIZE;
1100                 dev->rx_urb_size = DEFAULT_FS_BURST_CAP_SIZE;
1101         }
1102
1103         netif_dbg(dev, ifup, dev->net, "rx_urb_size=%ld\n",
1104                   (ulong)dev->rx_urb_size);
1105
1106         ret = smsc95xx_write_reg(dev, BURST_CAP, burst_cap);
1107         if (ret < 0)
1108                 return ret;
1109
1110         ret = smsc95xx_read_reg(dev, BURST_CAP, &read_buf);
1111         if (ret < 0)
1112                 return ret;
1113
1114         netif_dbg(dev, ifup, dev->net,
1115                   "Read Value from BURST_CAP after writing: 0x%08x\n",
1116                   read_buf);
1117
1118         ret = smsc95xx_write_reg(dev, BULK_IN_DLY, DEFAULT_BULK_IN_DELAY);
1119         if (ret < 0)
1120                 return ret;
1121
1122         ret = smsc95xx_read_reg(dev, BULK_IN_DLY, &read_buf);
1123         if (ret < 0)
1124                 return ret;
1125
1126         netif_dbg(dev, ifup, dev->net,
1127                   "Read Value from BULK_IN_DLY after writing: 0x%08x\n",
1128                   read_buf);
1129
1130         ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
1131         if (ret < 0)
1132                 return ret;
1133
1134         netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG: 0x%08x\n",
1135                   read_buf);
1136
1137         if (turbo_mode)
1138                 read_buf |= (HW_CFG_MEF_ | HW_CFG_BCE_);
1139
1140         read_buf &= ~HW_CFG_RXDOFF_;
1141
1142         /* set Rx data offset=2, Make IP header aligns on word boundary. */
1143         read_buf |= NET_IP_ALIGN << 9;
1144
1145         ret = smsc95xx_write_reg(dev, HW_CFG, read_buf);
1146         if (ret < 0)
1147                 return ret;
1148
1149         ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
1150         if (ret < 0)
1151                 return ret;
1152
1153         netif_dbg(dev, ifup, dev->net,
1154                   "Read Value from HW_CFG after writing: 0x%08x\n", read_buf);
1155
1156         ret = smsc95xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL_);
1157         if (ret < 0)
1158                 return ret;
1159
1160         ret = smsc95xx_read_reg(dev, ID_REV, &read_buf);
1161         if (ret < 0)
1162                 return ret;
1163         netif_dbg(dev, ifup, dev->net, "ID_REV = 0x%08x\n", read_buf);
1164
1165         /* Configure GPIO pins as LED outputs */
1166         write_buf = LED_GPIO_CFG_SPD_LED | LED_GPIO_CFG_LNK_LED |
1167                 LED_GPIO_CFG_FDX_LED;
1168         ret = smsc95xx_write_reg(dev, LED_GPIO_CFG, write_buf);
1169         if (ret < 0)
1170                 return ret;
1171
1172         /* Init Tx */
1173         ret = smsc95xx_write_reg(dev, FLOW, 0);
1174         if (ret < 0)
1175                 return ret;
1176
1177         ret = smsc95xx_write_reg(dev, AFC_CFG, AFC_CFG_DEFAULT);
1178         if (ret < 0)
1179                 return ret;
1180
1181         /* Don't need mac_cr_lock during initialisation */
1182         ret = smsc95xx_read_reg(dev, MAC_CR, &pdata->mac_cr);
1183         if (ret < 0)
1184                 return ret;
1185
1186         /* Init Rx */
1187         /* Set Vlan */
1188         ret = smsc95xx_write_reg(dev, VLAN1, (u32)ETH_P_8021Q);
1189         if (ret < 0)
1190                 return ret;
1191
1192         /* Enable or disable checksum offload engines */
1193         ret = smsc95xx_set_features(dev->net, dev->net->features);
1194         if (ret < 0) {
1195                 netdev_warn(dev->net, "Failed to set checksum offload features\n");
1196                 return ret;
1197         }
1198
1199         smsc95xx_set_multicast(dev->net);
1200
1201         ret = smsc95xx_phy_initialize(dev);
1202         if (ret < 0) {
1203                 netdev_warn(dev->net, "Failed to init PHY\n");
1204                 return ret;
1205         }
1206
1207         ret = smsc95xx_read_reg(dev, INT_EP_CTL, &read_buf);
1208         if (ret < 0)
1209                 return ret;
1210
1211         /* enable PHY interrupts */
1212         read_buf |= INT_EP_CTL_PHY_INT_;
1213
1214         ret = smsc95xx_write_reg(dev, INT_EP_CTL, read_buf);
1215         if (ret < 0)
1216                 return ret;
1217
1218         ret = smsc95xx_start_tx_path(dev);
1219         if (ret < 0) {
1220                 netdev_warn(dev->net, "Failed to start TX path\n");
1221                 return ret;
1222         }
1223
1224         ret = smsc95xx_start_rx_path(dev, 0);
1225         if (ret < 0) {
1226                 netdev_warn(dev->net, "Failed to start RX path\n");
1227                 return ret;
1228         }
1229
1230         netif_dbg(dev, ifup, dev->net, "smsc95xx_reset, return 0\n");
1231         return 0;
1232 }
1233
1234 static const struct net_device_ops smsc95xx_netdev_ops = {
1235         .ndo_open               = usbnet_open,
1236         .ndo_stop               = usbnet_stop,
1237         .ndo_start_xmit         = usbnet_start_xmit,
1238         .ndo_tx_timeout         = usbnet_tx_timeout,
1239         .ndo_change_mtu         = usbnet_change_mtu,
1240         .ndo_get_stats64        = usbnet_get_stats64,
1241         .ndo_set_mac_address    = eth_mac_addr,
1242         .ndo_validate_addr      = eth_validate_addr,
1243         .ndo_do_ioctl           = smsc95xx_ioctl,
1244         .ndo_set_rx_mode        = smsc95xx_set_multicast,
1245         .ndo_set_features       = smsc95xx_set_features,
1246 };
1247
1248 static int smsc95xx_bind(struct usbnet *dev, struct usb_interface *intf)
1249 {
1250         struct smsc95xx_priv *pdata = NULL;
1251         u32 val;
1252         int ret;
1253
1254         printk(KERN_INFO SMSC_CHIPNAME " v" SMSC_DRIVER_VERSION "\n");
1255
1256         ret = usbnet_get_endpoints(dev, intf);
1257         if (ret < 0) {
1258                 netdev_warn(dev->net, "usbnet_get_endpoints failed: %d\n", ret);
1259                 return ret;
1260         }
1261
1262         dev->data[0] = (unsigned long)kzalloc(sizeof(struct smsc95xx_priv),
1263                                               GFP_KERNEL);
1264
1265         pdata = (struct smsc95xx_priv *)(dev->data[0]);
1266         if (!pdata)
1267                 return -ENOMEM;
1268
1269         spin_lock_init(&pdata->mac_cr_lock);
1270
1271         /* LAN95xx devices do not alter the computed checksum of 0 to 0xffff.
1272          * RFC 2460, ipv6 UDP calculated checksum yields a result of zero must
1273          * be changed to 0xffff. RFC 768, ipv4 UDP computed checksum is zero,
1274          * it is transmitted as all ones. The zero transmitted checksum means
1275          * transmitter generated no checksum. Hence, enable csum offload only
1276          * for ipv4 packets.
1277          */
1278         if (DEFAULT_TX_CSUM_ENABLE)
1279                 dev->net->features |= NETIF_F_IP_CSUM;
1280         if (DEFAULT_RX_CSUM_ENABLE)
1281                 dev->net->features |= NETIF_F_RXCSUM;
1282
1283         dev->net->hw_features = NETIF_F_IP_CSUM | NETIF_F_RXCSUM;
1284         set_bit(EVENT_NO_IP_ALIGN, &dev->flags);
1285
1286         smsc95xx_init_mac_address(dev);
1287
1288         /* Init all registers */
1289         ret = smsc95xx_reset(dev);
1290
1291         /* detect device revision as different features may be available */
1292         ret = smsc95xx_read_reg(dev, ID_REV, &val);
1293         if (ret < 0)
1294                 return ret;
1295         val >>= 16;
1296         pdata->chip_id = val;
1297         pdata->mdix_ctrl = get_mdix_status(dev->net);
1298
1299         if ((val == ID_REV_CHIP_ID_9500A_) || (val == ID_REV_CHIP_ID_9530_) ||
1300             (val == ID_REV_CHIP_ID_89530_) || (val == ID_REV_CHIP_ID_9730_))
1301                 pdata->features = (FEATURE_8_WAKEUP_FILTERS |
1302                         FEATURE_PHY_NLP_CROSSOVER |
1303                         FEATURE_REMOTE_WAKEUP);
1304         else if (val == ID_REV_CHIP_ID_9512_)
1305                 pdata->features = FEATURE_8_WAKEUP_FILTERS;
1306
1307         dev->net->netdev_ops = &smsc95xx_netdev_ops;
1308         dev->net->ethtool_ops = &smsc95xx_ethtool_ops;
1309         dev->net->flags |= IFF_MULTICAST;
1310         dev->net->hard_header_len += SMSC95XX_TX_OVERHEAD_CSUM;
1311         dev->net->min_mtu = ETH_MIN_MTU;
1312         dev->net->max_mtu = ETH_DATA_LEN;
1313         dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len;
1314
1315         pdata->dev = dev;
1316         INIT_DELAYED_WORK(&pdata->carrier_check, check_carrier);
1317         schedule_delayed_work(&pdata->carrier_check, CARRIER_CHECK_DELAY);
1318
1319         return 0;
1320 }
1321
1322 static void smsc95xx_unbind(struct usbnet *dev, struct usb_interface *intf)
1323 {
1324         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1325
1326         if (pdata) {
1327                 cancel_delayed_work(&pdata->carrier_check);
1328                 netif_dbg(dev, ifdown, dev->net, "free pdata\n");
1329                 kfree(pdata);
1330                 pdata = NULL;
1331                 dev->data[0] = 0;
1332         }
1333 }
1334
1335 static u32 smsc_crc(const u8 *buffer, size_t len, int filter)
1336 {
1337         u32 crc = bitrev16(crc16(0xFFFF, buffer, len));
1338         return crc << ((filter % 2) * 16);
1339 }
1340
1341 static int smsc95xx_enable_phy_wakeup_interrupts(struct usbnet *dev, u16 mask)
1342 {
1343         struct mii_if_info *mii = &dev->mii;
1344         int ret;
1345
1346         netdev_dbg(dev->net, "enabling PHY wakeup interrupts\n");
1347
1348         /* read to clear */
1349         ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_SRC);
1350         if (ret < 0)
1351                 return ret;
1352
1353         /* enable interrupt source */
1354         ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_MASK);
1355         if (ret < 0)
1356                 return ret;
1357
1358         ret |= mask;
1359
1360         smsc95xx_mdio_write_nopm(dev->net, mii->phy_id, PHY_INT_MASK, ret);
1361
1362         return 0;
1363 }
1364
1365 static int smsc95xx_link_ok_nopm(struct usbnet *dev)
1366 {
1367         struct mii_if_info *mii = &dev->mii;
1368         int ret;
1369
1370         /* first, a dummy read, needed to latch some MII phys */
1371         ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR);
1372         if (ret < 0)
1373                 return ret;
1374
1375         ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR);
1376         if (ret < 0)
1377                 return ret;
1378
1379         return !!(ret & BMSR_LSTATUS);
1380 }
1381
1382 static int smsc95xx_enter_suspend0(struct usbnet *dev)
1383 {
1384         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1385         u32 val;
1386         int ret;
1387
1388         ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1389         if (ret < 0)
1390                 return ret;
1391
1392         val &= (~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_));
1393         val |= PM_CTL_SUS_MODE_0;
1394
1395         ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1396         if (ret < 0)
1397                 return ret;
1398
1399         /* clear wol status */
1400         val &= ~PM_CTL_WUPS_;
1401         val |= PM_CTL_WUPS_WOL_;
1402
1403         /* enable energy detection */
1404         if (pdata->wolopts & WAKE_PHY)
1405                 val |= PM_CTL_WUPS_ED_;
1406
1407         ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1408         if (ret < 0)
1409                 return ret;
1410
1411         /* read back PM_CTRL */
1412         ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1413         if (ret < 0)
1414                 return ret;
1415
1416         pdata->suspend_flags |= SUSPEND_SUSPEND0;
1417
1418         return 0;
1419 }
1420
1421 static int smsc95xx_enter_suspend1(struct usbnet *dev)
1422 {
1423         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1424         struct mii_if_info *mii = &dev->mii;
1425         u32 val;
1426         int ret;
1427
1428         /* reconfigure link pulse detection timing for
1429          * compatibility with non-standard link partners
1430          */
1431         if (pdata->features & FEATURE_PHY_NLP_CROSSOVER)
1432                 smsc95xx_mdio_write_nopm(dev->net, mii->phy_id, PHY_EDPD_CONFIG,
1433                         PHY_EDPD_CONFIG_DEFAULT);
1434
1435         /* enable energy detect power-down mode */
1436         ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_MODE_CTRL_STS);
1437         if (ret < 0)
1438                 return ret;
1439
1440         ret |= MODE_CTRL_STS_EDPWRDOWN_;
1441
1442         smsc95xx_mdio_write_nopm(dev->net, mii->phy_id, PHY_MODE_CTRL_STS, ret);
1443
1444         /* enter SUSPEND1 mode */
1445         ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1446         if (ret < 0)
1447                 return ret;
1448
1449         val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_);
1450         val |= PM_CTL_SUS_MODE_1;
1451
1452         ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1453         if (ret < 0)
1454                 return ret;
1455
1456         /* clear wol status, enable energy detection */
1457         val &= ~PM_CTL_WUPS_;
1458         val |= (PM_CTL_WUPS_ED_ | PM_CTL_ED_EN_);
1459
1460         ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1461         if (ret < 0)
1462                 return ret;
1463
1464         pdata->suspend_flags |= SUSPEND_SUSPEND1;
1465
1466         return 0;
1467 }
1468
1469 static int smsc95xx_enter_suspend2(struct usbnet *dev)
1470 {
1471         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1472         u32 val;
1473         int ret;
1474
1475         ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1476         if (ret < 0)
1477                 return ret;
1478
1479         val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_);
1480         val |= PM_CTL_SUS_MODE_2;
1481
1482         ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1483         if (ret < 0)
1484                 return ret;
1485
1486         pdata->suspend_flags |= SUSPEND_SUSPEND2;
1487
1488         return 0;
1489 }
1490
1491 static int smsc95xx_enter_suspend3(struct usbnet *dev)
1492 {
1493         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1494         u32 val;
1495         int ret;
1496
1497         ret = smsc95xx_read_reg_nopm(dev, RX_FIFO_INF, &val);
1498         if (ret < 0)
1499                 return ret;
1500
1501         if (val & RX_FIFO_INF_USED_) {
1502                 netdev_info(dev->net, "rx fifo not empty in autosuspend\n");
1503                 return -EBUSY;
1504         }
1505
1506         ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1507         if (ret < 0)
1508                 return ret;
1509
1510         val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_);
1511         val |= PM_CTL_SUS_MODE_3 | PM_CTL_RES_CLR_WKP_STS;
1512
1513         ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1514         if (ret < 0)
1515                 return ret;
1516
1517         /* clear wol status */
1518         val &= ~PM_CTL_WUPS_;
1519         val |= PM_CTL_WUPS_WOL_;
1520
1521         ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1522         if (ret < 0)
1523                 return ret;
1524
1525         pdata->suspend_flags |= SUSPEND_SUSPEND3;
1526
1527         return 0;
1528 }
1529
1530 static int smsc95xx_autosuspend(struct usbnet *dev, u32 link_up)
1531 {
1532         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1533         int ret;
1534
1535         if (!netif_running(dev->net)) {
1536                 /* interface is ifconfig down so fully power down hw */
1537                 netdev_dbg(dev->net, "autosuspend entering SUSPEND2\n");
1538                 return smsc95xx_enter_suspend2(dev);
1539         }
1540
1541         if (!link_up) {
1542                 /* link is down so enter EDPD mode, but only if device can
1543                  * reliably resume from it.  This check should be redundant
1544                  * as current FEATURE_REMOTE_WAKEUP parts also support
1545                  * FEATURE_PHY_NLP_CROSSOVER but it's included for clarity */
1546                 if (!(pdata->features & FEATURE_PHY_NLP_CROSSOVER)) {
1547                         netdev_warn(dev->net, "EDPD not supported\n");
1548                         return -EBUSY;
1549                 }
1550
1551                 netdev_dbg(dev->net, "autosuspend entering SUSPEND1\n");
1552
1553                 /* enable PHY wakeup events for if cable is attached */
1554                 ret = smsc95xx_enable_phy_wakeup_interrupts(dev,
1555                         PHY_INT_MASK_ANEG_COMP_);
1556                 if (ret < 0) {
1557                         netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1558                         return ret;
1559                 }
1560
1561                 netdev_info(dev->net, "entering SUSPEND1 mode\n");
1562                 return smsc95xx_enter_suspend1(dev);
1563         }
1564
1565         /* enable PHY wakeup events so we remote wakeup if cable is pulled */
1566         ret = smsc95xx_enable_phy_wakeup_interrupts(dev,
1567                 PHY_INT_MASK_LINK_DOWN_);
1568         if (ret < 0) {
1569                 netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1570                 return ret;
1571         }
1572
1573         netdev_dbg(dev->net, "autosuspend entering SUSPEND3\n");
1574         return smsc95xx_enter_suspend3(dev);
1575 }
1576
1577 static int smsc95xx_suspend(struct usb_interface *intf, pm_message_t message)
1578 {
1579         struct usbnet *dev = usb_get_intfdata(intf);
1580         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1581         u32 val, link_up;
1582         int ret;
1583
1584         ret = usbnet_suspend(intf, message);
1585         if (ret < 0) {
1586                 netdev_warn(dev->net, "usbnet_suspend error\n");
1587                 return ret;
1588         }
1589
1590         cancel_delayed_work_sync(&pdata->carrier_check);
1591
1592         if (pdata->suspend_flags) {
1593                 netdev_warn(dev->net, "error during last resume\n");
1594                 pdata->suspend_flags = 0;
1595         }
1596
1597         /* determine if link is up using only _nopm functions */
1598         link_up = smsc95xx_link_ok_nopm(dev);
1599
1600         if (message.event == PM_EVENT_AUTO_SUSPEND &&
1601             (pdata->features & FEATURE_REMOTE_WAKEUP)) {
1602                 ret = smsc95xx_autosuspend(dev, link_up);
1603                 goto done;
1604         }
1605
1606         /* if we get this far we're not autosuspending */
1607         /* if no wol options set, or if link is down and we're not waking on
1608          * PHY activity, enter lowest power SUSPEND2 mode
1609          */
1610         if (!(pdata->wolopts & SUPPORTED_WAKE) ||
1611                 !(link_up || (pdata->wolopts & WAKE_PHY))) {
1612                 netdev_info(dev->net, "entering SUSPEND2 mode\n");
1613
1614                 /* disable energy detect (link up) & wake up events */
1615                 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val);
1616                 if (ret < 0)
1617                         goto done;
1618
1619                 val &= ~(WUCSR_MPEN_ | WUCSR_WAKE_EN_);
1620
1621                 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val);
1622                 if (ret < 0)
1623                         goto done;
1624
1625                 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1626                 if (ret < 0)
1627                         goto done;
1628
1629                 val &= ~(PM_CTL_ED_EN_ | PM_CTL_WOL_EN_);
1630
1631                 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1632                 if (ret < 0)
1633                         goto done;
1634
1635                 ret = smsc95xx_enter_suspend2(dev);
1636                 goto done;
1637         }
1638
1639         if (pdata->wolopts & WAKE_PHY) {
1640                 ret = smsc95xx_enable_phy_wakeup_interrupts(dev,
1641                         (PHY_INT_MASK_ANEG_COMP_ | PHY_INT_MASK_LINK_DOWN_));
1642                 if (ret < 0) {
1643                         netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1644                         goto done;
1645                 }
1646
1647                 /* if link is down then configure EDPD and enter SUSPEND1,
1648                  * otherwise enter SUSPEND0 below
1649                  */
1650                 if (!link_up) {
1651                         netdev_info(dev->net, "entering SUSPEND1 mode\n");
1652                         ret = smsc95xx_enter_suspend1(dev);
1653                         goto done;
1654                 }
1655         }
1656
1657         if (pdata->wolopts & (WAKE_BCAST | WAKE_MCAST | WAKE_ARP | WAKE_UCAST)) {
1658                 u32 *filter_mask = kcalloc(32, sizeof(u32), GFP_KERNEL);
1659                 u32 command[2];
1660                 u32 offset[2];
1661                 u32 crc[4];
1662                 int wuff_filter_count =
1663                         (pdata->features & FEATURE_8_WAKEUP_FILTERS) ?
1664                         LAN9500A_WUFF_NUM : LAN9500_WUFF_NUM;
1665                 int i, filter = 0;
1666
1667                 if (!filter_mask) {
1668                         netdev_warn(dev->net, "Unable to allocate filter_mask\n");
1669                         ret = -ENOMEM;
1670                         goto done;
1671                 }
1672
1673                 memset(command, 0, sizeof(command));
1674                 memset(offset, 0, sizeof(offset));
1675                 memset(crc, 0, sizeof(crc));
1676
1677                 if (pdata->wolopts & WAKE_BCAST) {
1678                         const u8 bcast[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
1679                         netdev_info(dev->net, "enabling broadcast detection\n");
1680                         filter_mask[filter * 4] = 0x003F;
1681                         filter_mask[filter * 4 + 1] = 0x00;
1682                         filter_mask[filter * 4 + 2] = 0x00;
1683                         filter_mask[filter * 4 + 3] = 0x00;
1684                         command[filter/4] |= 0x05UL << ((filter % 4) * 8);
1685                         offset[filter/4] |= 0x00 << ((filter % 4) * 8);
1686                         crc[filter/2] |= smsc_crc(bcast, 6, filter);
1687                         filter++;
1688                 }
1689
1690                 if (pdata->wolopts & WAKE_MCAST) {
1691                         const u8 mcast[] = {0x01, 0x00, 0x5E};
1692                         netdev_info(dev->net, "enabling multicast detection\n");
1693                         filter_mask[filter * 4] = 0x0007;
1694                         filter_mask[filter * 4 + 1] = 0x00;
1695                         filter_mask[filter * 4 + 2] = 0x00;
1696                         filter_mask[filter * 4 + 3] = 0x00;
1697                         command[filter/4] |= 0x09UL << ((filter % 4) * 8);
1698                         offset[filter/4] |= 0x00  << ((filter % 4) * 8);
1699                         crc[filter/2] |= smsc_crc(mcast, 3, filter);
1700                         filter++;
1701                 }
1702
1703                 if (pdata->wolopts & WAKE_ARP) {
1704                         const u8 arp[] = {0x08, 0x06};
1705                         netdev_info(dev->net, "enabling ARP detection\n");
1706                         filter_mask[filter * 4] = 0x0003;
1707                         filter_mask[filter * 4 + 1] = 0x00;
1708                         filter_mask[filter * 4 + 2] = 0x00;
1709                         filter_mask[filter * 4 + 3] = 0x00;
1710                         command[filter/4] |= 0x05UL << ((filter % 4) * 8);
1711                         offset[filter/4] |= 0x0C << ((filter % 4) * 8);
1712                         crc[filter/2] |= smsc_crc(arp, 2, filter);
1713                         filter++;
1714                 }
1715
1716                 if (pdata->wolopts & WAKE_UCAST) {
1717                         netdev_info(dev->net, "enabling unicast detection\n");
1718                         filter_mask[filter * 4] = 0x003F;
1719                         filter_mask[filter * 4 + 1] = 0x00;
1720                         filter_mask[filter * 4 + 2] = 0x00;
1721                         filter_mask[filter * 4 + 3] = 0x00;
1722                         command[filter/4] |= 0x01UL << ((filter % 4) * 8);
1723                         offset[filter/4] |= 0x00 << ((filter % 4) * 8);
1724                         crc[filter/2] |= smsc_crc(dev->net->dev_addr, ETH_ALEN, filter);
1725                         filter++;
1726                 }
1727
1728                 for (i = 0; i < (wuff_filter_count * 4); i++) {
1729                         ret = smsc95xx_write_reg_nopm(dev, WUFF, filter_mask[i]);
1730                         if (ret < 0) {
1731                                 kfree(filter_mask);
1732                                 goto done;
1733                         }
1734                 }
1735                 kfree(filter_mask);
1736
1737                 for (i = 0; i < (wuff_filter_count / 4); i++) {
1738                         ret = smsc95xx_write_reg_nopm(dev, WUFF, command[i]);
1739                         if (ret < 0)
1740                                 goto done;
1741                 }
1742
1743                 for (i = 0; i < (wuff_filter_count / 4); i++) {
1744                         ret = smsc95xx_write_reg_nopm(dev, WUFF, offset[i]);
1745                         if (ret < 0)
1746                                 goto done;
1747                 }
1748
1749                 for (i = 0; i < (wuff_filter_count / 2); i++) {
1750                         ret = smsc95xx_write_reg_nopm(dev, WUFF, crc[i]);
1751                         if (ret < 0)
1752                                 goto done;
1753                 }
1754
1755                 /* clear any pending pattern match packet status */
1756                 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val);
1757                 if (ret < 0)
1758                         goto done;
1759
1760                 val |= WUCSR_WUFR_;
1761
1762                 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val);
1763                 if (ret < 0)
1764                         goto done;
1765         }
1766
1767         if (pdata->wolopts & WAKE_MAGIC) {
1768                 /* clear any pending magic packet status */
1769                 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val);
1770                 if (ret < 0)
1771                         goto done;
1772
1773                 val |= WUCSR_MPR_;
1774
1775                 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val);
1776                 if (ret < 0)
1777                         goto done;
1778         }
1779
1780         /* enable/disable wakeup sources */
1781         ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val);
1782         if (ret < 0)
1783                 goto done;
1784
1785         if (pdata->wolopts & (WAKE_BCAST | WAKE_MCAST | WAKE_ARP | WAKE_UCAST)) {
1786                 netdev_info(dev->net, "enabling pattern match wakeup\n");
1787                 val |= WUCSR_WAKE_EN_;
1788         } else {
1789                 netdev_info(dev->net, "disabling pattern match wakeup\n");
1790                 val &= ~WUCSR_WAKE_EN_;
1791         }
1792
1793         if (pdata->wolopts & WAKE_MAGIC) {
1794                 netdev_info(dev->net, "enabling magic packet wakeup\n");
1795                 val |= WUCSR_MPEN_;
1796         } else {
1797                 netdev_info(dev->net, "disabling magic packet wakeup\n");
1798                 val &= ~WUCSR_MPEN_;
1799         }
1800
1801         ret = smsc95xx_write_reg_nopm(dev, WUCSR, val);
1802         if (ret < 0)
1803                 goto done;
1804
1805         /* enable wol wakeup source */
1806         ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1807         if (ret < 0)
1808                 goto done;
1809
1810         val |= PM_CTL_WOL_EN_;
1811
1812         /* phy energy detect wakeup source */
1813         if (pdata->wolopts & WAKE_PHY)
1814                 val |= PM_CTL_ED_EN_;
1815
1816         ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1817         if (ret < 0)
1818                 goto done;
1819
1820         /* enable receiver to enable frame reception */
1821         smsc95xx_start_rx_path(dev, 1);
1822
1823         /* some wol options are enabled, so enter SUSPEND0 */
1824         netdev_info(dev->net, "entering SUSPEND0 mode\n");
1825         ret = smsc95xx_enter_suspend0(dev);
1826
1827 done:
1828         /*
1829          * TODO: resume() might need to handle the suspend failure
1830          * in system sleep
1831          */
1832         if (ret && PMSG_IS_AUTO(message))
1833                 usbnet_resume(intf);
1834
1835         if (ret)
1836                 schedule_delayed_work(&pdata->carrier_check,
1837                                       CARRIER_CHECK_DELAY);
1838
1839         return ret;
1840 }
1841
1842 static int smsc95xx_resume(struct usb_interface *intf)
1843 {
1844         struct usbnet *dev = usb_get_intfdata(intf);
1845         struct smsc95xx_priv *pdata;
1846         u8 suspend_flags;
1847         int ret;
1848         u32 val;
1849
1850         BUG_ON(!dev);
1851         pdata = (struct smsc95xx_priv *)(dev->data[0]);
1852         suspend_flags = pdata->suspend_flags;
1853
1854         netdev_dbg(dev->net, "resume suspend_flags=0x%02x\n", suspend_flags);
1855
1856         /* do this first to ensure it's cleared even in error case */
1857         pdata->suspend_flags = 0;
1858         schedule_delayed_work(&pdata->carrier_check, CARRIER_CHECK_DELAY);
1859
1860         if (suspend_flags & SUSPEND_ALLMODES) {
1861                 /* clear wake-up sources */
1862                 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val);
1863                 if (ret < 0)
1864                         return ret;
1865
1866                 val &= ~(WUCSR_WAKE_EN_ | WUCSR_MPEN_);
1867
1868                 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val);
1869                 if (ret < 0)
1870                         return ret;
1871
1872                 /* clear wake-up status */
1873                 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1874                 if (ret < 0)
1875                         return ret;
1876
1877                 val &= ~PM_CTL_WOL_EN_;
1878                 val |= PM_CTL_WUPS_;
1879
1880                 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1881                 if (ret < 0)
1882                         return ret;
1883         }
1884
1885         ret = usbnet_resume(intf);
1886         if (ret < 0)
1887                 netdev_warn(dev->net, "usbnet_resume error\n");
1888
1889         return ret;
1890 }
1891
1892 static int smsc95xx_reset_resume(struct usb_interface *intf)
1893 {
1894         struct usbnet *dev = usb_get_intfdata(intf);
1895         int ret;
1896
1897         ret = smsc95xx_reset(dev);
1898         if (ret < 0)
1899                 return ret;
1900
1901         return smsc95xx_resume(intf);
1902 }
1903
1904 static void smsc95xx_rx_csum_offload(struct sk_buff *skb)
1905 {
1906         skb->csum = *(u16 *)(skb_tail_pointer(skb) - 2);
1907         skb->ip_summed = CHECKSUM_COMPLETE;
1908         skb_trim(skb, skb->len - 2);
1909 }
1910
1911 static int smsc95xx_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
1912 {
1913         /* This check is no longer done by usbnet */
1914         if (skb->len < dev->net->hard_header_len)
1915                 return 0;
1916
1917         while (skb->len > 0) {
1918                 u32 header, align_count;
1919                 struct sk_buff *ax_skb;
1920                 unsigned char *packet;
1921                 u16 size;
1922
1923                 header = get_unaligned_le32(skb->data);
1924                 skb_pull(skb, 4 + NET_IP_ALIGN);
1925                 packet = skb->data;
1926
1927                 /* get the packet length */
1928                 size = (u16)((header & RX_STS_FL_) >> 16);
1929                 align_count = (4 - ((size + NET_IP_ALIGN) % 4)) % 4;
1930
1931                 if (unlikely(header & RX_STS_ES_)) {
1932                         netif_dbg(dev, rx_err, dev->net,
1933                                   "Error header=0x%08x\n", header);
1934                         dev->net->stats.rx_errors++;
1935                         dev->net->stats.rx_dropped++;
1936
1937                         if (header & RX_STS_CRC_) {
1938                                 dev->net->stats.rx_crc_errors++;
1939                         } else {
1940                                 if (header & (RX_STS_TL_ | RX_STS_RF_))
1941                                         dev->net->stats.rx_frame_errors++;
1942
1943                                 if ((header & RX_STS_LE_) &&
1944                                         (!(header & RX_STS_FT_)))
1945                                         dev->net->stats.rx_length_errors++;
1946                         }
1947                 } else {
1948                         /* ETH_FRAME_LEN + 4(CRC) + 2(COE) + 4(Vlan) */
1949                         if (unlikely(size > (ETH_FRAME_LEN + 12))) {
1950                                 netif_dbg(dev, rx_err, dev->net,
1951                                           "size err header=0x%08x\n", header);
1952                                 return 0;
1953                         }
1954
1955                         /* last frame in this batch */
1956                         if (skb->len == size) {
1957                                 if (dev->net->features & NETIF_F_RXCSUM)
1958                                         smsc95xx_rx_csum_offload(skb);
1959                                 skb_trim(skb, skb->len - 4); /* remove fcs */
1960                                 skb->truesize = size + sizeof(struct sk_buff);
1961
1962                                 return 1;
1963                         }
1964
1965                         ax_skb = skb_clone(skb, GFP_ATOMIC);
1966                         if (unlikely(!ax_skb)) {
1967                                 netdev_warn(dev->net, "Error allocating skb\n");
1968                                 return 0;
1969                         }
1970
1971                         ax_skb->len = size;
1972                         ax_skb->data = packet;
1973                         skb_set_tail_pointer(ax_skb, size);
1974
1975                         if (dev->net->features & NETIF_F_RXCSUM)
1976                                 smsc95xx_rx_csum_offload(ax_skb);
1977                         skb_trim(ax_skb, ax_skb->len - 4); /* remove fcs */
1978                         ax_skb->truesize = size + sizeof(struct sk_buff);
1979
1980                         usbnet_skb_return(dev, ax_skb);
1981                 }
1982
1983                 skb_pull(skb, size);
1984
1985                 /* padding bytes before the next frame starts */
1986                 if (skb->len)
1987                         skb_pull(skb, align_count);
1988         }
1989
1990         return 1;
1991 }
1992
1993 static u32 smsc95xx_calc_csum_preamble(struct sk_buff *skb)
1994 {
1995         u16 low_16 = (u16)skb_checksum_start_offset(skb);
1996         u16 high_16 = low_16 + skb->csum_offset;
1997         return (high_16 << 16) | low_16;
1998 }
1999
2000 /* The TX CSUM won't work if the checksum lies in the last 4 bytes of the
2001  * transmission. This is fairly unlikely, only seems to trigger with some
2002  * short TCP ACK packets sent.
2003  *
2004  * Note, this calculation should probably check for the alignment of the
2005  * data as well, but a straight check for csum being in the last four bytes
2006  * of the packet should be ok for now.
2007  */
2008 static bool smsc95xx_can_tx_checksum(struct sk_buff *skb)
2009 {
2010        unsigned int len = skb->len - skb_checksum_start_offset(skb);
2011
2012        if (skb->len <= 45)
2013                return false;
2014        return skb->csum_offset < (len - (4 + 1));
2015 }
2016
2017 static struct sk_buff *smsc95xx_tx_fixup(struct usbnet *dev,
2018                                          struct sk_buff *skb, gfp_t flags)
2019 {
2020         bool csum = skb->ip_summed == CHECKSUM_PARTIAL;
2021         int overhead = csum ? SMSC95XX_TX_OVERHEAD_CSUM : SMSC95XX_TX_OVERHEAD;
2022         u32 tx_cmd_a, tx_cmd_b;
2023         void *ptr;
2024
2025         /* We do not advertise SG, so skbs should be already linearized */
2026         BUG_ON(skb_shinfo(skb)->nr_frags);
2027
2028         /* Make writable and expand header space by overhead if required */
2029         if (skb_cow_head(skb, overhead)) {
2030                 /* Must deallocate here as returning NULL to indicate error
2031                  * means the skb won't be deallocated in the caller.
2032                  */
2033                 dev_kfree_skb_any(skb);
2034                 return NULL;
2035         }
2036
2037         tx_cmd_b = (u32)skb->len;
2038         tx_cmd_a = tx_cmd_b | TX_CMD_A_FIRST_SEG_ | TX_CMD_A_LAST_SEG_;
2039
2040         if (csum) {
2041                 if (!smsc95xx_can_tx_checksum(skb)) {
2042                         /* workaround - hardware tx checksum does not work
2043                          * properly with extremely small packets */
2044                         long csstart = skb_checksum_start_offset(skb);
2045                         __wsum calc = csum_partial(skb->data + csstart,
2046                                 skb->len - csstart, 0);
2047                         *((__sum16 *)(skb->data + csstart
2048                                 + skb->csum_offset)) = csum_fold(calc);
2049
2050                         csum = false;
2051                 } else {
2052                         u32 csum_preamble = smsc95xx_calc_csum_preamble(skb);
2053                         ptr = skb_push(skb, 4);
2054                         put_unaligned_le32(csum_preamble, ptr);
2055
2056                         tx_cmd_a += 4;
2057                         tx_cmd_b += 4;
2058                         tx_cmd_b |= TX_CMD_B_CSUM_ENABLE;
2059                 }
2060         }
2061
2062         ptr = skb_push(skb, 8);
2063         put_unaligned_le32(tx_cmd_a, ptr);
2064         put_unaligned_le32(tx_cmd_b, ptr+4);
2065
2066         return skb;
2067 }
2068
2069 static int smsc95xx_manage_power(struct usbnet *dev, int on)
2070 {
2071         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
2072
2073         dev->intf->needs_remote_wakeup = on;
2074
2075         if (pdata->features & FEATURE_REMOTE_WAKEUP)
2076                 return 0;
2077
2078         /* this chip revision isn't capable of remote wakeup */
2079         netdev_info(dev->net, "hardware isn't capable of remote wakeup\n");
2080
2081         if (on)
2082                 usb_autopm_get_interface_no_resume(dev->intf);
2083         else
2084                 usb_autopm_put_interface(dev->intf);
2085
2086         return 0;
2087 }
2088
2089 static const struct driver_info smsc95xx_info = {
2090         .description    = "smsc95xx USB 2.0 Ethernet",
2091         .bind           = smsc95xx_bind,
2092         .unbind         = smsc95xx_unbind,
2093         .link_reset     = smsc95xx_link_reset,
2094         .reset          = smsc95xx_reset,
2095         .rx_fixup       = smsc95xx_rx_fixup,
2096         .tx_fixup       = smsc95xx_tx_fixup,
2097         .status         = smsc95xx_status,
2098         .manage_power   = smsc95xx_manage_power,
2099         .flags          = FLAG_ETHER | FLAG_SEND_ZLP | FLAG_LINK_INTR,
2100 };
2101
2102 static const struct usb_device_id products[] = {
2103         {
2104                 /* SMSC9500 USB Ethernet Device */
2105                 USB_DEVICE(0x0424, 0x9500),
2106                 .driver_info = (unsigned long) &smsc95xx_info,
2107         },
2108         {
2109                 /* SMSC9505 USB Ethernet Device */
2110                 USB_DEVICE(0x0424, 0x9505),
2111                 .driver_info = (unsigned long) &smsc95xx_info,
2112         },
2113         {
2114                 /* SMSC9500A USB Ethernet Device */
2115                 USB_DEVICE(0x0424, 0x9E00),
2116                 .driver_info = (unsigned long) &smsc95xx_info,
2117         },
2118         {
2119                 /* SMSC9505A USB Ethernet Device */
2120                 USB_DEVICE(0x0424, 0x9E01),
2121                 .driver_info = (unsigned long) &smsc95xx_info,
2122         },
2123         {
2124                 /* SMSC9512/9514 USB Hub & Ethernet Device */
2125                 USB_DEVICE(0x0424, 0xec00),
2126                 .driver_info = (unsigned long) &smsc95xx_info,
2127         },
2128         {
2129                 /* SMSC9500 USB Ethernet Device (SAL10) */
2130                 USB_DEVICE(0x0424, 0x9900),
2131                 .driver_info = (unsigned long) &smsc95xx_info,
2132         },
2133         {
2134                 /* SMSC9505 USB Ethernet Device (SAL10) */
2135                 USB_DEVICE(0x0424, 0x9901),
2136                 .driver_info = (unsigned long) &smsc95xx_info,
2137         },
2138         {
2139                 /* SMSC9500A USB Ethernet Device (SAL10) */
2140                 USB_DEVICE(0x0424, 0x9902),
2141                 .driver_info = (unsigned long) &smsc95xx_info,
2142         },
2143         {
2144                 /* SMSC9505A USB Ethernet Device (SAL10) */
2145                 USB_DEVICE(0x0424, 0x9903),
2146                 .driver_info = (unsigned long) &smsc95xx_info,
2147         },
2148         {
2149                 /* SMSC9512/9514 USB Hub & Ethernet Device (SAL10) */
2150                 USB_DEVICE(0x0424, 0x9904),
2151                 .driver_info = (unsigned long) &smsc95xx_info,
2152         },
2153         {
2154                 /* SMSC9500A USB Ethernet Device (HAL) */
2155                 USB_DEVICE(0x0424, 0x9905),
2156                 .driver_info = (unsigned long) &smsc95xx_info,
2157         },
2158         {
2159                 /* SMSC9505A USB Ethernet Device (HAL) */
2160                 USB_DEVICE(0x0424, 0x9906),
2161                 .driver_info = (unsigned long) &smsc95xx_info,
2162         },
2163         {
2164                 /* SMSC9500 USB Ethernet Device (Alternate ID) */
2165                 USB_DEVICE(0x0424, 0x9907),
2166                 .driver_info = (unsigned long) &smsc95xx_info,
2167         },
2168         {
2169                 /* SMSC9500A USB Ethernet Device (Alternate ID) */
2170                 USB_DEVICE(0x0424, 0x9908),
2171                 .driver_info = (unsigned long) &smsc95xx_info,
2172         },
2173         {
2174                 /* SMSC9512/9514 USB Hub & Ethernet Device (Alternate ID) */
2175                 USB_DEVICE(0x0424, 0x9909),
2176                 .driver_info = (unsigned long) &smsc95xx_info,
2177         },
2178         {
2179                 /* SMSC LAN9530 USB Ethernet Device */
2180                 USB_DEVICE(0x0424, 0x9530),
2181                 .driver_info = (unsigned long) &smsc95xx_info,
2182         },
2183         {
2184                 /* SMSC LAN9730 USB Ethernet Device */
2185                 USB_DEVICE(0x0424, 0x9730),
2186                 .driver_info = (unsigned long) &smsc95xx_info,
2187         },
2188         {
2189                 /* SMSC LAN89530 USB Ethernet Device */
2190                 USB_DEVICE(0x0424, 0x9E08),
2191                 .driver_info = (unsigned long) &smsc95xx_info,
2192         },
2193         { },            /* END */
2194 };
2195 MODULE_DEVICE_TABLE(usb, products);
2196
2197 static struct usb_driver smsc95xx_driver = {
2198         .name           = "smsc95xx",
2199         .id_table       = products,
2200         .probe          = usbnet_probe,
2201         .suspend        = smsc95xx_suspend,
2202         .resume         = smsc95xx_resume,
2203         .reset_resume   = smsc95xx_reset_resume,
2204         .disconnect     = usbnet_disconnect,
2205         .disable_hub_initiated_lpm = 1,
2206         .supports_autosuspend = 1,
2207 };
2208
2209 module_usb_driver(smsc95xx_driver);
2210
2211 MODULE_AUTHOR("Nancy Lin");
2212 MODULE_AUTHOR("Steve Glendinning <steve.glendinning@shawell.net>");
2213 MODULE_DESCRIPTION("SMSC95XX USB 2.0 Ethernet Devices");
2214 MODULE_LICENSE("GPL");