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 <linux/mdio.h>
  22 #include <linux/phy.h>
  23 #include "smsc95xx.h"
  24
  25 #define SMSC_CHIPNAME                   "smsc95xx"
  26 #define SMSC_DRIVER_VERSION             "2.0.0"
  27 #define HS_USB_PKT_SIZE                 (512)
  28 #define FS_USB_PKT_SIZE                 (64)
  29 #define DEFAULT_HS_BURST_CAP_SIZE       (16 * 1024 + 5 * HS_USB_PKT_SIZE)
  30 #define DEFAULT_FS_BURST_CAP_SIZE       (6 * 1024 + 33 * FS_USB_PKT_SIZE)
  31 #define DEFAULT_BULK_IN_DELAY           (0x00002000)
  32 #define MAX_SINGLE_PACKET_SIZE          (2048)
  33 #define LAN95XX_EEPROM_MAGIC            (0x9500)
  34 #define EEPROM_MAC_OFFSET               (0x01)
  35 #define DEFAULT_TX_CSUM_ENABLE          (true)
  36 #define DEFAULT_RX_CSUM_ENABLE          (true)
  37 #define SMSC95XX_INTERNAL_PHY_ID        (1)
  38 #define SMSC95XX_TX_OVERHEAD            (8)
  39 #define SMSC95XX_TX_OVERHEAD_CSUM       (12)
  40 #define SUPPORTED_WAKE                  (WAKE_PHY | WAKE_UCAST | WAKE_BCAST | \
  41                                          WAKE_MCAST | WAKE_ARP | WAKE_MAGIC)
  42
  43 #define FEATURE_8_WAKEUP_FILTERS        (0x01)
  44 #define FEATURE_PHY_NLP_CROSSOVER       (0x02)
  45 #define FEATURE_REMOTE_WAKEUP           (0x04)
  46
  47 #define SUSPEND_SUSPEND0                (0x01)
  48 #define SUSPEND_SUSPEND1                (0x02)
  49 #define SUSPEND_SUSPEND2                (0x04)
  50 #define SUSPEND_SUSPEND3                (0x08)
  51 #define SUSPEND_ALLMODES                (SUSPEND_SUSPEND0 | SUSPEND_SUSPEND1 | \
  52                                          SUSPEND_SUSPEND2 | SUSPEND_SUSPEND3)
  53 #define MAC_ADDR_LEN                    (6)
  54
  55 struct smsc95xx_priv {
  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         struct mii_bus *mdiobus;
  64         struct phy_device *phydev;
  65 };
  66
  67 static bool turbo_mode = true;
  68 module_param(turbo_mode, bool, 0644);
  69 MODULE_PARM_DESC(turbo_mode, "Enable multiple frames per Rx transaction");
  70
  71 static bool truesize_mode = false;
  72 module_param(truesize_mode, bool, 0644);
  73 MODULE_PARM_DESC(truesize_mode, "Report larger truesize value");
  74
  75 static int packetsize = 2560;
  76 module_param(packetsize, int, 0644);
  77 MODULE_PARM_DESC(packetsize, "Override the RX URB packet size");
  78
  79 static char *macaddr = ":";
  80 module_param(macaddr, charp, 0);
  81 MODULE_PARM_DESC(macaddr, "MAC address");
  82
  83 static int __must_check __smsc95xx_read_reg(struct usbnet *dev, u32 index,
  84                                             u32 *data, int in_pm)
  85 {
  86         u32 buf;
  87         int ret;
  88         int (*fn)(struct usbnet *, u8, u8, u16, u16, void *, u16);
  89
  90         BUG_ON(!dev);
  91
  92         if (!in_pm)
  93                 fn = usbnet_read_cmd;
  94         else
  95                 fn = usbnet_read_cmd_nopm;
  96
  97         ret = fn(dev, USB_VENDOR_REQUEST_READ_REGISTER, USB_DIR_IN
  98                  | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
  99                  0, index, &buf, 4);
 100         if (ret < 0) {
 101                 if (ret != -ENODEV)
 102                         netdev_warn(dev->net, "Failed to read reg index 0x%08x: %d\n",
 103                                     index, ret);
 104                 return ret;
 105         }
 106
 107         le32_to_cpus(&buf);
 108         *data = buf;
 109
 110         return ret;
 111 }
 112
 113 static int __must_check __smsc95xx_write_reg(struct usbnet *dev, u32 index,
 114                                              u32 data, int in_pm)
 115 {
 116         u32 buf;
 117         int ret;
 118         int (*fn)(struct usbnet *, u8, u8, u16, u16, const void *, u16);
 119
 120         BUG_ON(!dev);
 121
 122         if (!in_pm)
 123                 fn = usbnet_write_cmd;
 124         else
 125                 fn = usbnet_write_cmd_nopm;
 126
 127         buf = data;
 128         cpu_to_le32s(&buf);
 129
 130         ret = fn(dev, USB_VENDOR_REQUEST_WRITE_REGISTER, USB_DIR_OUT
 131                  | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 132                  0, index, &buf, 4);
 133         if (ret < 0 && ret != -ENODEV)
 134                 netdev_warn(dev->net, "Failed to write reg index 0x%08x: %d\n",
 135                             index, ret);
 136
 137         return ret;
 138 }
 139
 140 static int __must_check smsc95xx_read_reg_nopm(struct usbnet *dev, u32 index,
 141                                                u32 *data)
 142 {
 143         return __smsc95xx_read_reg(dev, index, data, 1);
 144 }
 145
 146 static int __must_check smsc95xx_write_reg_nopm(struct usbnet *dev, u32 index,
 147                                                 u32 data)
 148 {
 149         return __smsc95xx_write_reg(dev, index, data, 1);
 150 }
 151
 152 static int __must_check smsc95xx_read_reg(struct usbnet *dev, u32 index,
 153                                           u32 *data)
 154 {
 155         return __smsc95xx_read_reg(dev, index, data, 0);
 156 }
 157
 158 static int __must_check smsc95xx_write_reg(struct usbnet *dev, u32 index,
 159                                            u32 data)
 160 {
 161         return __smsc95xx_write_reg(dev, index, data, 0);
 162 }
 163
 164 /* Loop until the read is completed with timeout
 165  * called with phy_mutex held */
 166 static int __must_check __smsc95xx_phy_wait_not_busy(struct usbnet *dev,
 167                                                      int in_pm)
 168 {
 169         unsigned long start_time = jiffies;
 170         u32 val;
 171         int ret;
 172
 173         do {
 174                 ret = __smsc95xx_read_reg(dev, MII_ADDR, &val, in_pm);
 175                 if (ret < 0) {
 176                         /* Ignore -ENODEV error during disconnect() */
 177                         if (ret == -ENODEV)
 178                                 return 0;
 179                         netdev_warn(dev->net, "Error reading MII_ACCESS\n");
 180                         return ret;
 181                 }
 182
 183                 if (!(val & MII_BUSY_))
 184                         return 0;
 185         } while (!time_after(jiffies, start_time + HZ));
 186
 187         return -EIO;
 188 }
 189
 190 static u32 mii_address_cmd(int phy_id, int idx, u16 op)
 191 {
 192         return (phy_id & 0x1f) << 11 | (idx & 0x1f) << 6 | op;
 193 }
 194
 195 static int __smsc95xx_mdio_read(struct usbnet *dev, int phy_id, int idx,
 196                                 int in_pm)
 197 {
 198         u32 val, addr;
 199         int ret;
 200
 201         mutex_lock(&dev->phy_mutex);
 202
 203         /* confirm MII not busy */
 204         ret = __smsc95xx_phy_wait_not_busy(dev, in_pm);
 205         if (ret < 0) {
 206                 netdev_warn(dev->net, "%s: MII is busy\n", __func__);
 207                 goto done;
 208         }
 209
 210         /* set the address, index & direction (read from PHY) */
 211         addr = mii_address_cmd(phy_id, idx, MII_READ_ | MII_BUSY_);
 212         ret = __smsc95xx_write_reg(dev, MII_ADDR, addr, in_pm);
 213         if (ret < 0) {
 214                 if (ret != -ENODEV)
 215                         netdev_warn(dev->net, "Error writing MII_ADDR\n");
 216                 goto done;
 217         }
 218
 219         ret = __smsc95xx_phy_wait_not_busy(dev, in_pm);
 220         if (ret < 0) {
 221                 netdev_warn(dev->net, "Timed out reading MII reg %02X\n", idx);
 222                 goto done;
 223         }
 224
 225         ret = __smsc95xx_read_reg(dev, MII_DATA, &val, in_pm);
 226         if (ret < 0) {
 227                 if (ret != -ENODEV)
 228                         netdev_warn(dev->net, "Error reading MII_DATA\n");
 229                 goto done;
 230         }
 231
 232         ret = (u16)(val & 0xFFFF);
 233
 234 done:
 235         mutex_unlock(&dev->phy_mutex);
 236
 237         /* Ignore -ENODEV error during disconnect() */
 238         if (ret == -ENODEV)
 239                 return 0;
 240         return ret;
 241 }
 242
 243 static void __smsc95xx_mdio_write(struct usbnet *dev, int phy_id,
 244                                   int idx, int regval, int in_pm)
 245 {
 246         u32 val, addr;
 247         int ret;
 248
 249         mutex_lock(&dev->phy_mutex);
 250
 251         /* confirm MII not busy */
 252         ret = __smsc95xx_phy_wait_not_busy(dev, in_pm);
 253         if (ret < 0) {
 254                 netdev_warn(dev->net, "%s: MII is busy\n", __func__);
 255                 goto done;
 256         }
 257
 258         val = regval;
 259         ret = __smsc95xx_write_reg(dev, MII_DATA, val, in_pm);
 260         if (ret < 0) {
 261                 if (ret != -ENODEV)
 262                         netdev_warn(dev->net, "Error writing MII_DATA\n");
 263                 goto done;
 264         }
 265
 266         /* set the address, index & direction (write to PHY) */
 267         addr = mii_address_cmd(phy_id, idx, MII_WRITE_ | MII_BUSY_);
 268         ret = __smsc95xx_write_reg(dev, MII_ADDR, addr, in_pm);
 269         if (ret < 0) {
 270                 if (ret != -ENODEV)
 271                         netdev_warn(dev->net, "Error writing MII_ADDR\n");
 272                 goto done;
 273         }
 274
 275         ret = __smsc95xx_phy_wait_not_busy(dev, in_pm);
 276         if (ret < 0) {
 277                 netdev_warn(dev->net, "Timed out writing MII reg %02X\n", idx);
 278                 goto done;
 279         }
 280
 281 done:
 282         mutex_unlock(&dev->phy_mutex);
 283 }
 284
 285 static int smsc95xx_mdio_read_nopm(struct usbnet *dev, int idx)
 286 {
 287         struct smsc95xx_priv *pdata = dev->driver_priv;
 288
 289         return __smsc95xx_mdio_read(dev, pdata->phydev->mdio.addr, idx, 1);
 290 }
 291
 292 static void smsc95xx_mdio_write_nopm(struct usbnet *dev, int idx, int regval)
 293 {
 294         struct smsc95xx_priv *pdata = dev->driver_priv;
 295
 296         __smsc95xx_mdio_write(dev, pdata->phydev->mdio.addr, idx, regval, 1);
 297 }
 298
 299 static int smsc95xx_mdiobus_read(struct mii_bus *bus, int phy_id, int idx)
 300 {
 301         struct usbnet *dev = bus->priv;
 302
 303         return __smsc95xx_mdio_read(dev, phy_id, idx, 0);
 304 }
 305
 306 static int smsc95xx_mdiobus_write(struct mii_bus *bus, int phy_id, int idx,
 307                                   u16 regval)
 308 {
 309         struct usbnet *dev = bus->priv;
 310
 311         __smsc95xx_mdio_write(dev, phy_id, idx, regval, 0);
 312         return 0;
 313 }
 314
 315 static int __must_check smsc95xx_wait_eeprom(struct usbnet *dev)
 316 {
 317         unsigned long start_time = jiffies;
 318         u32 val;
 319         int ret;
 320
 321         do {
 322                 ret = smsc95xx_read_reg(dev, E2P_CMD, &val);
 323                 if (ret < 0) {
 324                         netdev_warn(dev->net, "Error reading E2P_CMD\n");
 325                         return ret;
 326                 }
 327
 328                 if (!(val & E2P_CMD_BUSY_) || (val & E2P_CMD_TIMEOUT_))
 329                         break;
 330                 udelay(40);
 331         } while (!time_after(jiffies, start_time + HZ));
 332
 333         if (val & (E2P_CMD_TIMEOUT_ | E2P_CMD_BUSY_)) {
 334                 netdev_warn(dev->net, "EEPROM read operation timeout\n");
 335                 return -EIO;
 336         }
 337
 338         return 0;
 339 }
 340
 341 static int __must_check smsc95xx_eeprom_confirm_not_busy(struct usbnet *dev)
 342 {
 343         unsigned long start_time = jiffies;
 344         u32 val;
 345         int ret;
 346
 347         do {
 348                 ret = smsc95xx_read_reg(dev, E2P_CMD, &val);
 349                 if (ret < 0) {
 350                         netdev_warn(dev->net, "Error reading E2P_CMD\n");
 351                         return ret;
 352                 }
 353
 354                 if (!(val & E2P_CMD_BUSY_))
 355                         return 0;
 356
 357                 udelay(40);
 358         } while (!time_after(jiffies, start_time + HZ));
 359
 360         netdev_warn(dev->net, "EEPROM is busy\n");
 361         return -EIO;
 362 }
 363
 364 static int smsc95xx_read_eeprom(struct usbnet *dev, u32 offset, u32 length,
 365                                 u8 *data)
 366 {
 367         u32 val;
 368         int i, ret;
 369
 370         BUG_ON(!dev);
 371         BUG_ON(!data);
 372
 373         ret = smsc95xx_eeprom_confirm_not_busy(dev);
 374         if (ret)
 375                 return ret;
 376
 377         for (i = 0; i < length; i++) {
 378                 val = E2P_CMD_BUSY_ | E2P_CMD_READ_ | (offset & E2P_CMD_ADDR_);
 379                 ret = smsc95xx_write_reg(dev, E2P_CMD, val);
 380                 if (ret < 0) {
 381                         netdev_warn(dev->net, "Error writing E2P_CMD\n");
 382                         return ret;
 383                 }
 384
 385                 ret = smsc95xx_wait_eeprom(dev);
 386                 if (ret < 0)
 387                         return ret;
 388
 389                 ret = smsc95xx_read_reg(dev, E2P_DATA, &val);
 390                 if (ret < 0) {
 391                         netdev_warn(dev->net, "Error reading E2P_DATA\n");
 392                         return ret;
 393                 }
 394
 395                 data[i] = val & 0xFF;
 396                 offset++;
 397         }
 398
 399         return 0;
 400 }
 401
 402 static int smsc95xx_write_eeprom(struct usbnet *dev, u32 offset, u32 length,
 403                                  u8 *data)
 404 {
 405         u32 val;
 406         int i, ret;
 407
 408         BUG_ON(!dev);
 409         BUG_ON(!data);
 410
 411         ret = smsc95xx_eeprom_confirm_not_busy(dev);
 412         if (ret)
 413                 return ret;
 414
 415         /* Issue write/erase enable command */
 416         val = E2P_CMD_BUSY_ | E2P_CMD_EWEN_;
 417         ret = smsc95xx_write_reg(dev, E2P_CMD, val);
 418         if (ret < 0) {
 419                 netdev_warn(dev->net, "Error writing E2P_DATA\n");
 420                 return ret;
 421         }
 422
 423         ret = smsc95xx_wait_eeprom(dev);
 424         if (ret < 0)
 425                 return ret;
 426
 427         for (i = 0; i < length; i++) {
 428
 429                 /* Fill data register */
 430                 val = data[i];
 431                 ret = smsc95xx_write_reg(dev, E2P_DATA, val);
 432                 if (ret < 0) {
 433                         netdev_warn(dev->net, "Error writing E2P_DATA\n");
 434                         return ret;
 435                 }
 436
 437                 /* Send "write" command */
 438                 val = E2P_CMD_BUSY_ | E2P_CMD_WRITE_ | (offset & E2P_CMD_ADDR_);
 439                 ret = smsc95xx_write_reg(dev, E2P_CMD, val);
 440                 if (ret < 0) {
 441                         netdev_warn(dev->net, "Error writing E2P_CMD\n");
 442                         return ret;
 443                 }
 444
 445                 ret = smsc95xx_wait_eeprom(dev);
 446                 if (ret < 0)
 447                         return ret;
 448
 449                 offset++;
 450         }
 451
 452         return 0;
 453 }
 454
 455 static int __must_check smsc95xx_write_reg_async(struct usbnet *dev, u16 index,
 456                                                  u32 data)
 457 {
 458         const u16 size = 4;
 459         u32 buf;
 460         int ret;
 461
 462         buf = data;
 463         cpu_to_le32s(&buf);
 464
 465         ret = usbnet_write_cmd_async(dev, USB_VENDOR_REQUEST_WRITE_REGISTER,
 466                                      USB_DIR_OUT | USB_TYPE_VENDOR |
 467                                      USB_RECIP_DEVICE,
 468                                      0, index, &buf, size);
 469         if (ret < 0)
 470                 netdev_warn(dev->net, "Error write async cmd, sts=%d\n",
 471                             ret);
 472         return ret;
 473 }
 474
 475 /* returns hash bit number for given MAC address
 476  * example:
 477  * 01 00 5E 00 00 01 -> returns bit number 31 */
 478 static unsigned int smsc95xx_hash(char addr[ETH_ALEN])
 479 {
 480         return (ether_crc(ETH_ALEN, addr) >> 26) & 0x3f;
 481 }
 482
 483 static void smsc95xx_set_multicast(struct net_device *netdev)
 484 {
 485         struct usbnet *dev = netdev_priv(netdev);
 486         struct smsc95xx_priv *pdata = dev->driver_priv;
 487         unsigned long flags;
 488         int ret;
 489
 490         pdata->hash_hi = 0;
 491         pdata->hash_lo = 0;
 492
 493         spin_lock_irqsave(&pdata->mac_cr_lock, flags);
 494
 495         if (dev->net->flags & IFF_PROMISC) {
 496                 netif_dbg(dev, drv, dev->net, "promiscuous mode enabled\n");
 497                 pdata->mac_cr |= MAC_CR_PRMS_;
 498                 pdata->mac_cr &= ~(MAC_CR_MCPAS_ | MAC_CR_HPFILT_);
 499         } else if (dev->net->flags & IFF_ALLMULTI) {
 500                 netif_dbg(dev, drv, dev->net, "receive all multicast enabled\n");
 501                 pdata->mac_cr |= MAC_CR_MCPAS_;
 502                 pdata->mac_cr &= ~(MAC_CR_PRMS_ | MAC_CR_HPFILT_);
 503         } else if (!netdev_mc_empty(dev->net)) {
 504                 struct netdev_hw_addr *ha;
 505
 506                 pdata->mac_cr |= MAC_CR_HPFILT_;
 507                 pdata->mac_cr &= ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_);
 508
 509                 netdev_for_each_mc_addr(ha, netdev) {
 510                         u32 bitnum = smsc95xx_hash(ha->addr);
 511                         u32 mask = 0x01 << (bitnum & 0x1F);
 512                         if (bitnum & 0x20)
 513                                 pdata->hash_hi |= mask;
 514                         else
 515                                 pdata->hash_lo |= mask;
 516                 }
 517
 518                 netif_dbg(dev, drv, dev->net, "HASHH=0x%08X, HASHL=0x%08X\n",
 519                                    pdata->hash_hi, pdata->hash_lo);
 520         } else {
 521                 netif_dbg(dev, drv, dev->net, "receive own packets only\n");
 522                 pdata->mac_cr &=
 523                         ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_ | MAC_CR_HPFILT_);
 524         }
 525
 526         spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
 527
 528         /* Initiate async writes, as we can't wait for completion here */
 529         ret = smsc95xx_write_reg_async(dev, HASHH, pdata->hash_hi);
 530         if (ret < 0)
 531                 netdev_warn(dev->net, "failed to initiate async write to HASHH\n");
 532
 533         ret = smsc95xx_write_reg_async(dev, HASHL, pdata->hash_lo);
 534         if (ret < 0)
 535                 netdev_warn(dev->net, "failed to initiate async write to HASHL\n");
 536
 537         ret = smsc95xx_write_reg_async(dev, MAC_CR, pdata->mac_cr);
 538         if (ret < 0)
 539                 netdev_warn(dev->net, "failed to initiate async write to MAC_CR\n");
 540 }
 541
 542 static int smsc95xx_phy_update_flowcontrol(struct usbnet *dev)
 543 {
 544         u32 flow = 0, afc_cfg;
 545         struct smsc95xx_priv *pdata = dev->driver_priv;
 546         bool tx_pause, rx_pause;
 547
 548         int ret = smsc95xx_read_reg(dev, AFC_CFG, &afc_cfg);
 549         if (ret < 0)
 550                 return ret;
 551
 552         if (pdata->phydev->duplex == DUPLEX_FULL) {
 553                 phy_get_pause(pdata->phydev, &tx_pause, &rx_pause);
 554
 555                 if (rx_pause)
 556                         flow = 0xFFFF0002;
 557
 558                 if (tx_pause) {
 559                         afc_cfg |= 0xF;
 560                         flow |= 0xFFFF0000;
 561                 } else {
 562                         afc_cfg &= ~0xF;
 563                 }
 564
 565                 netif_dbg(dev, link, dev->net, "rx pause %s, tx pause %s\n",
 566                           rx_pause ? "enabled" : "disabled",
 567                           tx_pause ? "enabled" : "disabled");
 568         } else {
 569                 netif_dbg(dev, link, dev->net, "half duplex\n");
 570                 afc_cfg |= 0xF;
 571         }
 572
 573         ret = smsc95xx_write_reg(dev, FLOW, flow);
 574         if (ret < 0)
 575                 return ret;
 576
 577         return smsc95xx_write_reg(dev, AFC_CFG, afc_cfg);
 578 }
 579
 580 static int smsc95xx_link_reset(struct usbnet *dev)
 581 {
 582         struct smsc95xx_priv *pdata = dev->driver_priv;
 583         unsigned long flags;
 584         int ret;
 585
 586         ret = smsc95xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL_);
 587         if (ret < 0)
 588                 return ret;
 589
 590         spin_lock_irqsave(&pdata->mac_cr_lock, flags);
 591         if (pdata->phydev->duplex != DUPLEX_FULL) {
 592                 pdata->mac_cr &= ~MAC_CR_FDPX_;
 593                 pdata->mac_cr |= MAC_CR_RCVOWN_;
 594         } else {
 595                 pdata->mac_cr &= ~MAC_CR_RCVOWN_;
 596                 pdata->mac_cr |= MAC_CR_FDPX_;
 597         }
 598         spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
 599
 600         ret = smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr);
 601         if (ret < 0)
 602                 return ret;
 603
 604         ret = smsc95xx_phy_update_flowcontrol(dev);
 605         if (ret < 0)
 606                 netdev_warn(dev->net, "Error updating PHY flow control\n");
 607
 608         return ret;
 609 }
 610
 611 static void smsc95xx_status(struct usbnet *dev, struct urb *urb)
 612 {
 613         u32 intdata;
 614
 615         if (urb->actual_length != 4) {
 616                 netdev_warn(dev->net, "unexpected urb length %d\n",
 617                             urb->actual_length);
 618                 return;
 619         }
 620
 621         intdata = get_unaligned_le32(urb->transfer_buffer);
 622         netif_dbg(dev, link, dev->net, "intdata: 0x%08X\n", intdata);
 623
 624         if (intdata & INT_ENP_PHY_INT_)
 625                 usbnet_defer_kevent(dev, EVENT_LINK_RESET);
 626         else
 627                 netdev_warn(dev->net, "unexpected interrupt, intdata=0x%08X\n",
 628                             intdata);
 629 }
 630
 631 /* Enable or disable Tx & Rx checksum offload engines */
 632 static int smsc95xx_set_features(struct net_device *netdev,
 633         netdev_features_t features)
 634 {
 635         struct usbnet *dev = netdev_priv(netdev);
 636         u32 read_buf;
 637         int ret;
 638
 639         ret = smsc95xx_read_reg(dev, COE_CR, &read_buf);
 640         if (ret < 0)
 641                 return ret;
 642
 643         if (features & NETIF_F_IP_CSUM)
 644                 read_buf |= Tx_COE_EN_;
 645         else
 646                 read_buf &= ~Tx_COE_EN_;
 647
 648         if (features & NETIF_F_RXCSUM)
 649                 read_buf |= Rx_COE_EN_;
 650         else
 651                 read_buf &= ~Rx_COE_EN_;
 652
 653         ret = smsc95xx_write_reg(dev, COE_CR, read_buf);
 654         if (ret < 0)
 655                 return ret;
 656
 657         netif_dbg(dev, hw, dev->net, "COE_CR = 0x%08x\n", read_buf);
 658         return 0;
 659 }
 660
 661 static int smsc95xx_ethtool_get_eeprom_len(struct net_device *net)
 662 {
 663         return MAX_EEPROM_SIZE;
 664 }
 665
 666 static int smsc95xx_ethtool_get_eeprom(struct net_device *netdev,
 667                                        struct ethtool_eeprom *ee, u8 *data)
 668 {
 669         struct usbnet *dev = netdev_priv(netdev);
 670
 671         ee->magic = LAN95XX_EEPROM_MAGIC;
 672
 673         return smsc95xx_read_eeprom(dev, ee->offset, ee->len, data);
 674 }
 675
 676 static int smsc95xx_ethtool_set_eeprom(struct net_device *netdev,
 677                                        struct ethtool_eeprom *ee, u8 *data)
 678 {
 679         struct usbnet *dev = netdev_priv(netdev);
 680
 681         if (ee->magic != LAN95XX_EEPROM_MAGIC) {
 682                 netdev_warn(dev->net, "EEPROM: magic value mismatch, magic = 0x%x\n",
 683                             ee->magic);
 684                 return -EINVAL;
 685         }
 686
 687         return smsc95xx_write_eeprom(dev, ee->offset, ee->len, data);
 688 }
 689
 690 static int smsc95xx_ethtool_getregslen(struct net_device *netdev)
 691 {
 692         /* all smsc95xx registers */
 693         return COE_CR - ID_REV + sizeof(u32);
 694 }
 695
 696 static void
 697 smsc95xx_ethtool_getregs(struct net_device *netdev, struct ethtool_regs *regs,
 698                          void *buf)
 699 {
 700         struct usbnet *dev = netdev_priv(netdev);
 701         unsigned int i, j;
 702         int retval;
 703         u32 *data = buf;
 704
 705         retval = smsc95xx_read_reg(dev, ID_REV, &regs->version);
 706         if (retval < 0) {
 707                 netdev_warn(netdev, "REGS: cannot read ID_REV\n");
 708                 return;
 709         }
 710
 711         for (i = ID_REV, j = 0; i <= COE_CR; i += (sizeof(u32)), j++) {
 712                 retval = smsc95xx_read_reg(dev, i, &data[j]);
 713                 if (retval < 0) {
 714                         netdev_warn(netdev, "REGS: cannot read reg[%x]\n", i);
 715                         return;
 716                 }
 717         }
 718 }
 719
 720 static void smsc95xx_ethtool_get_wol(struct net_device *net,
 721                                      struct ethtool_wolinfo *wolinfo)
 722 {
 723         struct usbnet *dev = netdev_priv(net);
 724         struct smsc95xx_priv *pdata = dev->driver_priv;
 725
 726         wolinfo->supported = SUPPORTED_WAKE;
 727         wolinfo->wolopts = pdata->wolopts;
 728 }
 729
 730 static int smsc95xx_ethtool_set_wol(struct net_device *net,
 731                                     struct ethtool_wolinfo *wolinfo)
 732 {
 733         struct usbnet *dev = netdev_priv(net);
 734         struct smsc95xx_priv *pdata = dev->driver_priv;
 735         int ret;
 736
 737         if (wolinfo->wolopts & ~SUPPORTED_WAKE)
 738                 return -EINVAL;
 739
 740         pdata->wolopts = wolinfo->wolopts & SUPPORTED_WAKE;
 741
 742         ret = device_set_wakeup_enable(&dev->udev->dev, pdata->wolopts);
 743         if (ret < 0)
 744                 netdev_warn(dev->net, "device_set_wakeup_enable error %d\n", ret);
 745
 746         return ret;
 747 }
 748
 749 static u32 smsc95xx_get_link(struct net_device *net)
 750 {
 751         phy_read_status(net->phydev);
 752         return net->phydev->link;
 753 }
 754
 755 static const struct ethtool_ops smsc95xx_ethtool_ops = {
 756         .get_link       = smsc95xx_get_link,
 757         .nway_reset     = phy_ethtool_nway_reset,
 758         .get_drvinfo    = usbnet_get_drvinfo,
 759         .get_msglevel   = usbnet_get_msglevel,
 760         .set_msglevel   = usbnet_set_msglevel,
 761         .get_eeprom_len = smsc95xx_ethtool_get_eeprom_len,
 762         .get_eeprom     = smsc95xx_ethtool_get_eeprom,
 763         .set_eeprom     = smsc95xx_ethtool_set_eeprom,
 764         .get_regs_len   = smsc95xx_ethtool_getregslen,
 765         .get_regs       = smsc95xx_ethtool_getregs,
 766         .get_wol        = smsc95xx_ethtool_get_wol,
 767         .set_wol        = smsc95xx_ethtool_set_wol,
 768         .get_link_ksettings     = phy_ethtool_get_link_ksettings,
 769         .set_link_ksettings     = phy_ethtool_set_link_ksettings,
 770         .get_ts_info    = ethtool_op_get_ts_info,
 771 };
 772
 773 static int smsc95xx_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
 774 {
 775         if (!netif_running(netdev))
 776                 return -EINVAL;
 777
 778         return phy_mii_ioctl(netdev->phydev, rq, cmd);
 779 }
 780
 781 /* Check the macaddr module parameter for a MAC address */
 782 static int smsc95xx_is_macaddr_param(struct usbnet *dev, u8 *dev_mac)
 783 {
 784        int i, j, got_num, num;
 785        u8 mtbl[MAC_ADDR_LEN];
 786
 787        if (macaddr[0] == ':')
 788                return 0;
 789
 790        i = 0;
 791        j = 0;
 792        num = 0;
 793        got_num = 0;
 794        while (j < MAC_ADDR_LEN) {
 795                if (macaddr[i] && macaddr[i] != ':') {
 796                        got_num++;
 797                        if ('0' <= macaddr[i] && macaddr[i] <= '9')
 798                                num = num * 16 + macaddr[i] - '0';
 799                        else if ('A' <= macaddr[i] && macaddr[i] <= 'F')
 800                                num = num * 16 + 10 + macaddr[i] - 'A';
 801                        else if ('a' <= macaddr[i] && macaddr[i] <= 'f')
 802                                num = num * 16 + 10 + macaddr[i] - 'a';
 803                        else
 804                                break;
 805                        i++;
 806                } else if (got_num == 2) {
 807                        mtbl[j++] = (u8) num;
 808                        num = 0;
 809                        got_num = 0;
 810                        i++;
 811                } else {
 812                        break;
 813                }
 814        }
 815
 816        if (j == MAC_ADDR_LEN) {
 817                netif_dbg(dev, ifup, dev->net, "Overriding MAC address with: "
 818                "%02x:%02x:%02x:%02x:%02x:%02x\n", mtbl[0], mtbl[1], mtbl[2],
 819                                                mtbl[3], mtbl[4], mtbl[5]);
 820                for (i = 0; i < MAC_ADDR_LEN; i++)
 821                        dev_mac[i] = mtbl[i];
 822                return 1;
 823        } else {
 824                return 0;
 825        }
 826 }
 827
 828 static void smsc95xx_init_mac_address(struct usbnet *dev)
 829 {
 830         /* maybe the boot loader passed the MAC address in devicetree */
 831         if (!eth_platform_get_mac_address(&dev->udev->dev,
 832                         dev->net->dev_addr)) {
 833                 if (is_valid_ether_addr(dev->net->dev_addr)) {
 834                         /* device tree values are valid so use them */
 835                         netif_dbg(dev, ifup, dev->net, "MAC address read from the device tree\n");
 836                         return;
 837                 }
 838         }
 839
 840         /* try reading mac address from EEPROM */
 841         if (smsc95xx_read_eeprom(dev, EEPROM_MAC_OFFSET, ETH_ALEN,
 842                         dev->net->dev_addr) == 0) {
 843                 if (is_valid_ether_addr(dev->net->dev_addr)) {
 844                         /* eeprom values are valid so use them */
 845                         netif_dbg(dev, ifup, dev->net, "MAC address read from EEPROM\n");
 846                         return;
 847                 }
 848         }
 849
 850         /* Check module parameters */
 851         if (smsc95xx_is_macaddr_param(dev, dev->net->dev_addr))
 852                 return;
 853
 854         /* no useful static MAC address found. generate a random one */
 855         eth_hw_addr_random(dev->net);
 856         netif_dbg(dev, ifup, dev->net, "MAC address set to eth_random_addr\n");
 857 }
 858
 859 static int smsc95xx_set_mac_address(struct usbnet *dev)
 860 {
 861         u32 addr_lo = dev->net->dev_addr[0] | dev->net->dev_addr[1] << 8 |
 862                 dev->net->dev_addr[2] << 16 | dev->net->dev_addr[3] << 24;
 863         u32 addr_hi = dev->net->dev_addr[4] | dev->net->dev_addr[5] << 8;
 864         int ret;
 865
 866         ret = smsc95xx_write_reg(dev, ADDRL, addr_lo);
 867         if (ret < 0)
 868                 return ret;
 869
 870         return smsc95xx_write_reg(dev, ADDRH, addr_hi);
 871 }
 872
 873 /* starts the TX path */
 874 static int smsc95xx_start_tx_path(struct usbnet *dev)
 875 {
 876         struct smsc95xx_priv *pdata = dev->driver_priv;
 877         unsigned long flags;
 878         int ret;
 879
 880         /* Enable Tx at MAC */
 881         spin_lock_irqsave(&pdata->mac_cr_lock, flags);
 882         pdata->mac_cr |= MAC_CR_TXEN_;
 883         spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
 884
 885         ret = smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr);
 886         if (ret < 0)
 887                 return ret;
 888
 889         /* Enable Tx at SCSRs */
 890         return smsc95xx_write_reg(dev, TX_CFG, TX_CFG_ON_);
 891 }
 892
 893 /* Starts the Receive path */
 894 static int smsc95xx_start_rx_path(struct usbnet *dev, int in_pm)
 895 {
 896         struct smsc95xx_priv *pdata = dev->driver_priv;
 897         unsigned long flags;
 898
 899         spin_lock_irqsave(&pdata->mac_cr_lock, flags);
 900         pdata->mac_cr |= MAC_CR_RXEN_;
 901         spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
 902
 903         return __smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr, in_pm);
 904 }
 905
 906 static int smsc95xx_reset(struct usbnet *dev)
 907 {
 908         struct smsc95xx_priv *pdata = dev->driver_priv;
 909         u32 read_buf, write_buf, burst_cap;
 910         int ret = 0, timeout;
 911
 912         netif_dbg(dev, ifup, dev->net, "entering smsc95xx_reset\n");
 913
 914         ret = smsc95xx_write_reg(dev, HW_CFG, HW_CFG_LRST_);
 915         if (ret < 0)
 916                 return ret;
 917
 918         timeout = 0;
 919         do {
 920                 msleep(10);
 921                 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
 922                 if (ret < 0)
 923                         return ret;
 924                 timeout++;
 925         } while ((read_buf & HW_CFG_LRST_) && (timeout < 100));
 926
 927         if (timeout >= 100) {
 928                 netdev_warn(dev->net, "timeout waiting for completion of Lite Reset\n");
 929                 return ret;
 930         }
 931
 932         ret = smsc95xx_write_reg(dev, PM_CTRL, PM_CTL_PHY_RST_);
 933         if (ret < 0)
 934                 return ret;
 935
 936         timeout = 0;
 937         do {
 938                 msleep(10);
 939                 ret = smsc95xx_read_reg(dev, PM_CTRL, &read_buf);
 940                 if (ret < 0)
 941                         return ret;
 942                 timeout++;
 943         } while ((read_buf & PM_CTL_PHY_RST_) && (timeout < 100));
 944
 945         if (timeout >= 100) {
 946                 netdev_warn(dev->net, "timeout waiting for PHY Reset\n");
 947                 return ret;
 948         }
 949
 950         ret = smsc95xx_set_mac_address(dev);
 951         if (ret < 0)
 952                 return ret;
 953
 954         netif_dbg(dev, ifup, dev->net, "MAC Address: %pM\n",
 955                   dev->net->dev_addr);
 956
 957         ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
 958         if (ret < 0)
 959                 return ret;
 960
 961         netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG : 0x%08x\n",
 962                   read_buf);
 963
 964         read_buf |= HW_CFG_BIR_;
 965
 966         ret = smsc95xx_write_reg(dev, HW_CFG, read_buf);
 967         if (ret < 0)
 968                 return ret;
 969
 970         ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
 971         if (ret < 0)
 972                 return ret;
 973
 974         netif_dbg(dev, ifup, dev->net,
 975                   "Read Value from HW_CFG after writing HW_CFG_BIR_: 0x%08x\n",
 976                   read_buf);
 977
 978         if (!turbo_mode) {
 979                 burst_cap = 0;
 980                 dev->rx_urb_size = packetsize ? packetsize : MAX_SINGLE_PACKET_SIZE;
 981         } else if (dev->udev->speed == USB_SPEED_HIGH) {
 982                 dev->rx_urb_size = packetsize ? packetsize : DEFAULT_HS_BURST_CAP_SIZE;
 983                 burst_cap = dev->rx_urb_size / HS_USB_PKT_SIZE;
 984         } else {
 985                 dev->rx_urb_size = packetsize ? packetsize : DEFAULT_FS_BURST_CAP_SIZE;
 986                 burst_cap = dev->rx_urb_size / FS_USB_PKT_SIZE;
 987         }
 988
 989         netif_dbg(dev, ifup, dev->net, "rx_urb_size=%ld\n",
 990                   (ulong)dev->rx_urb_size);
 991
 992         ret = smsc95xx_write_reg(dev, BURST_CAP, burst_cap);
 993         if (ret < 0)
 994                 return ret;
 995
 996         ret = smsc95xx_read_reg(dev, BURST_CAP, &read_buf);
 997         if (ret < 0)
 998                 return ret;
 999
1000         netif_dbg(dev, ifup, dev->net,
1001                   "Read Value from BURST_CAP after writing: 0x%08x\n",
1002                   read_buf);
1003
1004         ret = smsc95xx_write_reg(dev, BULK_IN_DLY, DEFAULT_BULK_IN_DELAY);
1005         if (ret < 0)
1006                 return ret;
1007
1008         ret = smsc95xx_read_reg(dev, BULK_IN_DLY, &read_buf);
1009         if (ret < 0)
1010                 return ret;
1011
1012         netif_dbg(dev, ifup, dev->net,
1013                   "Read Value from BULK_IN_DLY after writing: 0x%08x\n",
1014                   read_buf);
1015
1016         ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
1017         if (ret < 0)
1018                 return ret;
1019
1020         netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG: 0x%08x\n",
1021                   read_buf);
1022
1023         if (turbo_mode)
1024                 read_buf |= (HW_CFG_MEF_ | HW_CFG_BCE_);
1025
1026         read_buf &= ~HW_CFG_RXDOFF_;
1027
1028         /* set Rx data offset=2, Make IP header aligns on word boundary. */
1029         read_buf |= NET_IP_ALIGN << 9;
1030
1031         ret = smsc95xx_write_reg(dev, HW_CFG, read_buf);
1032         if (ret < 0)
1033                 return ret;
1034
1035         ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
1036         if (ret < 0)
1037                 return ret;
1038
1039         netif_dbg(dev, ifup, dev->net,
1040                   "Read Value from HW_CFG after writing: 0x%08x\n", read_buf);
1041
1042         ret = smsc95xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL_);
1043         if (ret < 0)
1044                 return ret;
1045
1046         ret = smsc95xx_read_reg(dev, ID_REV, &read_buf);
1047         if (ret < 0)
1048                 return ret;
1049         netif_dbg(dev, ifup, dev->net, "ID_REV = 0x%08x\n", read_buf);
1050
1051         /* Configure GPIO pins as LED outputs */
1052         write_buf = LED_GPIO_CFG_SPD_LED | LED_GPIO_CFG_LNK_LED |
1053                 LED_GPIO_CFG_FDX_LED;
1054         ret = smsc95xx_write_reg(dev, LED_GPIO_CFG, write_buf);
1055         if (ret < 0)
1056                 return ret;
1057
1058         /* Init Tx */
1059         ret = smsc95xx_write_reg(dev, FLOW, 0);
1060         if (ret < 0)
1061                 return ret;
1062
1063         ret = smsc95xx_write_reg(dev, AFC_CFG, AFC_CFG_DEFAULT);
1064         if (ret < 0)
1065                 return ret;
1066
1067         /* Don't need mac_cr_lock during initialisation */
1068         ret = smsc95xx_read_reg(dev, MAC_CR, &pdata->mac_cr);
1069         if (ret < 0)
1070                 return ret;
1071
1072         /* Init Rx */
1073         /* Set Vlan */
1074         ret = smsc95xx_write_reg(dev, VLAN1, (u32)ETH_P_8021Q);
1075         if (ret < 0)
1076                 return ret;
1077
1078         /* Enable or disable checksum offload engines */
1079         ret = smsc95xx_set_features(dev->net, dev->net->features);
1080         if (ret < 0) {
1081                 netdev_warn(dev->net, "Failed to set checksum offload features\n");
1082                 return ret;
1083         }
1084
1085         smsc95xx_set_multicast(dev->net);
1086
1087         ret = smsc95xx_read_reg(dev, INT_EP_CTL, &read_buf);
1088         if (ret < 0)
1089                 return ret;
1090
1091         /* enable PHY interrupts */
1092         read_buf |= INT_EP_CTL_PHY_INT_;
1093
1094         ret = smsc95xx_write_reg(dev, INT_EP_CTL, read_buf);
1095         if (ret < 0)
1096                 return ret;
1097
1098         ret = smsc95xx_start_tx_path(dev);
1099         if (ret < 0) {
1100                 netdev_warn(dev->net, "Failed to start TX path\n");
1101                 return ret;
1102         }
1103
1104         ret = smsc95xx_start_rx_path(dev, 0);
1105         if (ret < 0) {
1106                 netdev_warn(dev->net, "Failed to start RX path\n");
1107                 return ret;
1108         }
1109
1110         netif_dbg(dev, ifup, dev->net, "smsc95xx_reset, return 0\n");
1111         return 0;
1112 }
1113
1114 static const struct net_device_ops smsc95xx_netdev_ops = {
1115         .ndo_open               = usbnet_open,
1116         .ndo_stop               = usbnet_stop,
1117         .ndo_start_xmit         = usbnet_start_xmit,
1118         .ndo_tx_timeout         = usbnet_tx_timeout,
1119         .ndo_change_mtu         = usbnet_change_mtu,
1120         .ndo_get_stats64        = dev_get_tstats64,
1121         .ndo_set_mac_address    = eth_mac_addr,
1122         .ndo_validate_addr      = eth_validate_addr,
1123         .ndo_eth_ioctl          = smsc95xx_ioctl,
1124         .ndo_set_rx_mode        = smsc95xx_set_multicast,
1125         .ndo_set_features       = smsc95xx_set_features,
1126 };
1127
1128 static void smsc95xx_handle_link_change(struct net_device *net)
1129 {
1130         struct usbnet *dev = netdev_priv(net);
1131
1132         phy_print_status(net->phydev);
1133         usbnet_defer_kevent(dev, EVENT_LINK_CHANGE);
1134 }
1135
1136 static int smsc95xx_bind(struct usbnet *dev, struct usb_interface *intf)
1137 {
1138         struct smsc95xx_priv *pdata;
1139         bool is_internal_phy;
1140         u32 val;
1141         int ret;
1142
1143         printk(KERN_INFO SMSC_CHIPNAME " v" SMSC_DRIVER_VERSION "\n");
1144
1145         ret = usbnet_get_endpoints(dev, intf);
1146         if (ret < 0) {
1147                 netdev_warn(dev->net, "usbnet_get_endpoints failed: %d\n", ret);
1148                 return ret;
1149         }
1150
1151         pdata = kzalloc(sizeof(*pdata), GFP_KERNEL);
1152         if (!pdata)
1153                 return -ENOMEM;
1154
1155         dev->driver_priv = pdata;
1156
1157         spin_lock_init(&pdata->mac_cr_lock);
1158
1159         /* LAN95xx devices do not alter the computed checksum of 0 to 0xffff.
1160          * RFC 2460, ipv6 UDP calculated checksum yields a result of zero must
1161          * be changed to 0xffff. RFC 768, ipv4 UDP computed checksum is zero,
1162          * it is transmitted as all ones. The zero transmitted checksum means
1163          * transmitter generated no checksum. Hence, enable csum offload only
1164          * for ipv4 packets.
1165          */
1166         if (DEFAULT_TX_CSUM_ENABLE)
1167                 dev->net->features |= NETIF_F_IP_CSUM;
1168         if (DEFAULT_RX_CSUM_ENABLE)
1169                 dev->net->features |= NETIF_F_RXCSUM;
1170
1171         dev->net->hw_features = NETIF_F_IP_CSUM | NETIF_F_RXCSUM;
1172         set_bit(EVENT_NO_IP_ALIGN, &dev->flags);
1173
1174         smsc95xx_init_mac_address(dev);
1175
1176         /* Init all registers */
1177         ret = smsc95xx_reset(dev);
1178         if (ret)
1179                 goto free_pdata;
1180
1181         pdata->mdiobus = mdiobus_alloc();
1182         if (!pdata->mdiobus) {
1183                 ret = -ENOMEM;
1184                 goto free_pdata;
1185         }
1186
1187         ret = smsc95xx_read_reg(dev, HW_CFG, &val);
1188         if (ret < 0)
1189                 goto free_mdio;
1190
1191         is_internal_phy = !(val & HW_CFG_PSEL_);
1192         if (is_internal_phy)
1193                 pdata->mdiobus->phy_mask = ~(1u << SMSC95XX_INTERNAL_PHY_ID);
1194
1195         pdata->mdiobus->priv = dev;
1196         pdata->mdiobus->read = smsc95xx_mdiobus_read;
1197         pdata->mdiobus->write = smsc95xx_mdiobus_write;
1198         pdata->mdiobus->name = "smsc95xx-mdiobus";
1199         pdata->mdiobus->parent = &dev->udev->dev;
1200
1201         snprintf(pdata->mdiobus->id, ARRAY_SIZE(pdata->mdiobus->id),
1202                  "usb-%03d:%03d", dev->udev->bus->busnum, dev->udev->devnum);
1203
1204         ret = mdiobus_register(pdata->mdiobus);
1205         if (ret) {
1206                 netdev_err(dev->net, "Could not register MDIO bus\n");
1207                 goto free_mdio;
1208         }
1209
1210         pdata->phydev = phy_find_first(pdata->mdiobus);
1211         if (!pdata->phydev) {
1212                 netdev_err(dev->net, "no PHY found\n");
1213                 ret = -ENODEV;
1214                 goto unregister_mdio;
1215         }
1216
1217         pdata->phydev->is_internal = is_internal_phy;
1218
1219         /* detect device revision as different features may be available */
1220         ret = smsc95xx_read_reg(dev, ID_REV, &val);
1221         if (ret < 0)
1222                 goto unregister_mdio;
1223
1224         val >>= 16;
1225         if ((val == ID_REV_CHIP_ID_9500A_) || (val == ID_REV_CHIP_ID_9530_) ||
1226             (val == ID_REV_CHIP_ID_89530_) || (val == ID_REV_CHIP_ID_9730_))
1227                 pdata->features = (FEATURE_8_WAKEUP_FILTERS |
1228                         FEATURE_PHY_NLP_CROSSOVER |
1229                         FEATURE_REMOTE_WAKEUP);
1230         else if (val == ID_REV_CHIP_ID_9512_)
1231                 pdata->features = FEATURE_8_WAKEUP_FILTERS;
1232
1233         dev->net->netdev_ops = &smsc95xx_netdev_ops;
1234         dev->net->ethtool_ops = &smsc95xx_ethtool_ops;
1235         dev->net->flags |= IFF_MULTICAST;
1236         dev->net->hard_header_len += SMSC95XX_TX_OVERHEAD_CSUM;
1237         dev->net->min_mtu = ETH_MIN_MTU;
1238         dev->net->max_mtu = ETH_DATA_LEN;
1239         dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len;
1240
1241         ret = phy_connect_direct(dev->net, pdata->phydev,
1242                                  &smsc95xx_handle_link_change,
1243                                  PHY_INTERFACE_MODE_MII);
1244         if (ret) {
1245                 netdev_err(dev->net, "can't attach PHY to %s\n", pdata->mdiobus->id);
1246                 goto unregister_mdio;
1247         }
1248
1249         phy_attached_info(dev->net->phydev);
1250
1251         return 0;
1252
1253 unregister_mdio:
1254         mdiobus_unregister(pdata->mdiobus);
1255
1256 free_mdio:
1257         mdiobus_free(pdata->mdiobus);
1258
1259 free_pdata:
1260         kfree(pdata);
1261         return ret;
1262 }
1263
1264 static void smsc95xx_unbind(struct usbnet *dev, struct usb_interface *intf)
1265 {
1266         struct smsc95xx_priv *pdata = dev->driver_priv;
1267
1268         phy_disconnect(dev->net->phydev);
1269         mdiobus_unregister(pdata->mdiobus);
1270         mdiobus_free(pdata->mdiobus);
1271         netif_dbg(dev, ifdown, dev->net, "free pdata\n");
1272         kfree(pdata);
1273 }
1274
1275 static int smsc95xx_start_phy(struct usbnet *dev)
1276 {
1277         phy_start(dev->net->phydev);
1278
1279         return 0;
1280 }
1281
1282 static int smsc95xx_stop(struct usbnet *dev)
1283 {
1284         phy_stop(dev->net->phydev);
1285
1286         return 0;
1287 }
1288
1289 static u32 smsc_crc(const u8 *buffer, size_t len, int filter)
1290 {
1291         u32 crc = bitrev16(crc16(0xFFFF, buffer, len));
1292         return crc << ((filter % 2) * 16);
1293 }
1294
1295 static int smsc95xx_enable_phy_wakeup_interrupts(struct usbnet *dev, u16 mask)
1296 {
1297         int ret;
1298
1299         netdev_dbg(dev->net, "enabling PHY wakeup interrupts\n");
1300
1301         /* read to clear */
1302         ret = smsc95xx_mdio_read_nopm(dev, PHY_INT_SRC);
1303         if (ret < 0)
1304                 return ret;
1305
1306         /* enable interrupt source */
1307         ret = smsc95xx_mdio_read_nopm(dev, PHY_INT_MASK);
1308         if (ret < 0)
1309                 return ret;
1310
1311         ret |= mask;
1312
1313         smsc95xx_mdio_write_nopm(dev, PHY_INT_MASK, ret);
1314
1315         return 0;
1316 }
1317
1318 static int smsc95xx_link_ok_nopm(struct usbnet *dev)
1319 {
1320         int ret;
1321
1322         /* first, a dummy read, needed to latch some MII phys */
1323         ret = smsc95xx_mdio_read_nopm(dev, MII_BMSR);
1324         if (ret < 0)
1325                 return ret;
1326
1327         ret = smsc95xx_mdio_read_nopm(dev, MII_BMSR);
1328         if (ret < 0)
1329                 return ret;
1330
1331         return !!(ret & BMSR_LSTATUS);
1332 }
1333
1334 static int smsc95xx_enter_suspend0(struct usbnet *dev)
1335 {
1336         struct smsc95xx_priv *pdata = dev->driver_priv;
1337         u32 val;
1338         int ret;
1339
1340         ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1341         if (ret < 0)
1342                 return ret;
1343
1344         val &= (~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_));
1345         val |= PM_CTL_SUS_MODE_0;
1346
1347         ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1348         if (ret < 0)
1349                 return ret;
1350
1351         /* clear wol status */
1352         val &= ~PM_CTL_WUPS_;
1353         val |= PM_CTL_WUPS_WOL_;
1354
1355         /* enable energy detection */
1356         if (pdata->wolopts & WAKE_PHY)
1357                 val |= PM_CTL_WUPS_ED_;
1358
1359         ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1360         if (ret < 0)
1361                 return ret;
1362
1363         /* read back PM_CTRL */
1364         ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1365         if (ret < 0)
1366                 return ret;
1367
1368         pdata->suspend_flags |= SUSPEND_SUSPEND0;
1369
1370         return 0;
1371 }
1372
1373 static int smsc95xx_enter_suspend1(struct usbnet *dev)
1374 {
1375         struct smsc95xx_priv *pdata = dev->driver_priv;
1376         u32 val;
1377         int ret;
1378
1379         /* reconfigure link pulse detection timing for
1380          * compatibility with non-standard link partners
1381          */
1382         if (pdata->features & FEATURE_PHY_NLP_CROSSOVER)
1383                 smsc95xx_mdio_write_nopm(dev, PHY_EDPD_CONFIG,
1384                                          PHY_EDPD_CONFIG_DEFAULT);
1385
1386         /* enable energy detect power-down mode */
1387         ret = smsc95xx_mdio_read_nopm(dev, PHY_MODE_CTRL_STS);
1388         if (ret < 0)
1389                 return ret;
1390
1391         ret |= MODE_CTRL_STS_EDPWRDOWN_;
1392
1393         smsc95xx_mdio_write_nopm(dev, PHY_MODE_CTRL_STS, ret);
1394
1395         /* enter SUSPEND1 mode */
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_1;
1402
1403         ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1404         if (ret < 0)
1405                 return ret;
1406
1407         /* clear wol status, enable energy detection */
1408         val &= ~PM_CTL_WUPS_;
1409         val |= (PM_CTL_WUPS_ED_ | PM_CTL_ED_EN_);
1410
1411         ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1412         if (ret < 0)
1413                 return ret;
1414
1415         pdata->suspend_flags |= SUSPEND_SUSPEND1;
1416
1417         return 0;
1418 }
1419
1420 static int smsc95xx_enter_suspend2(struct usbnet *dev)
1421 {
1422         struct smsc95xx_priv *pdata = dev->driver_priv;
1423         u32 val;
1424         int ret;
1425
1426         ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1427         if (ret < 0)
1428                 return ret;
1429
1430         val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_);
1431         val |= PM_CTL_SUS_MODE_2;
1432
1433         ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1434         if (ret < 0)
1435                 return ret;
1436
1437         pdata->suspend_flags |= SUSPEND_SUSPEND2;
1438
1439         return 0;
1440 }
1441
1442 static int smsc95xx_enter_suspend3(struct usbnet *dev)
1443 {
1444         struct smsc95xx_priv *pdata = dev->driver_priv;
1445         u32 val;
1446         int ret;
1447
1448         ret = smsc95xx_read_reg_nopm(dev, RX_FIFO_INF, &val);
1449         if (ret < 0)
1450                 return ret;
1451
1452         if (val & RX_FIFO_INF_USED_) {
1453                 netdev_info(dev->net, "rx fifo not empty in autosuspend\n");
1454                 return -EBUSY;
1455         }
1456
1457         ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1458         if (ret < 0)
1459                 return ret;
1460
1461         val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_);
1462         val |= PM_CTL_SUS_MODE_3 | PM_CTL_RES_CLR_WKP_STS;
1463
1464         ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1465         if (ret < 0)
1466                 return ret;
1467
1468         /* clear wol status */
1469         val &= ~PM_CTL_WUPS_;
1470         val |= PM_CTL_WUPS_WOL_;
1471
1472         ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1473         if (ret < 0)
1474                 return ret;
1475
1476         pdata->suspend_flags |= SUSPEND_SUSPEND3;
1477
1478         return 0;
1479 }
1480
1481 static int smsc95xx_autosuspend(struct usbnet *dev, u32 link_up)
1482 {
1483         struct smsc95xx_priv *pdata = dev->driver_priv;
1484         int ret;
1485
1486         if (!netif_running(dev->net)) {
1487                 /* interface is ifconfig down so fully power down hw */
1488                 netdev_dbg(dev->net, "autosuspend entering SUSPEND2\n");
1489                 return smsc95xx_enter_suspend2(dev);
1490         }
1491
1492         if (!link_up) {
1493                 /* link is down so enter EDPD mode, but only if device can
1494                  * reliably resume from it.  This check should be redundant
1495                  * as current FEATURE_REMOTE_WAKEUP parts also support
1496                  * FEATURE_PHY_NLP_CROSSOVER but it's included for clarity */
1497                 if (!(pdata->features & FEATURE_PHY_NLP_CROSSOVER)) {
1498                         netdev_warn(dev->net, "EDPD not supported\n");
1499                         return -EBUSY;
1500                 }
1501
1502                 netdev_dbg(dev->net, "autosuspend entering SUSPEND1\n");
1503
1504                 /* enable PHY wakeup events for if cable is attached */
1505                 ret = smsc95xx_enable_phy_wakeup_interrupts(dev,
1506                         PHY_INT_MASK_ANEG_COMP_);
1507                 if (ret < 0) {
1508                         netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1509                         return ret;
1510                 }
1511
1512                 netdev_info(dev->net, "entering SUSPEND1 mode\n");
1513                 return smsc95xx_enter_suspend1(dev);
1514         }
1515
1516         /* enable PHY wakeup events so we remote wakeup if cable is pulled */
1517         ret = smsc95xx_enable_phy_wakeup_interrupts(dev,
1518                 PHY_INT_MASK_LINK_DOWN_);
1519         if (ret < 0) {
1520                 netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1521                 return ret;
1522         }
1523
1524         netdev_dbg(dev->net, "autosuspend entering SUSPEND3\n");
1525         return smsc95xx_enter_suspend3(dev);
1526 }
1527
1528 static int smsc95xx_suspend(struct usb_interface *intf, pm_message_t message)
1529 {
1530         struct usbnet *dev = usb_get_intfdata(intf);
1531         struct smsc95xx_priv *pdata = dev->driver_priv;
1532         u32 val, link_up;
1533         int ret;
1534
1535         ret = usbnet_suspend(intf, message);
1536         if (ret < 0) {
1537                 netdev_warn(dev->net, "usbnet_suspend error\n");
1538                 return ret;
1539         }
1540
1541         if (pdata->suspend_flags) {
1542                 netdev_warn(dev->net, "error during last resume\n");
1543                 pdata->suspend_flags = 0;
1544         }
1545
1546         /* determine if link is up using only _nopm functions */
1547         link_up = smsc95xx_link_ok_nopm(dev);
1548
1549         if (message.event == PM_EVENT_AUTO_SUSPEND &&
1550             (pdata->features & FEATURE_REMOTE_WAKEUP)) {
1551                 ret = smsc95xx_autosuspend(dev, link_up);
1552                 goto done;
1553         }
1554
1555         /* if we get this far we're not autosuspending */
1556         /* if no wol options set, or if link is down and we're not waking on
1557          * PHY activity, enter lowest power SUSPEND2 mode
1558          */
1559         if (!(pdata->wolopts & SUPPORTED_WAKE) ||
1560                 !(link_up || (pdata->wolopts & WAKE_PHY))) {
1561                 netdev_info(dev->net, "entering SUSPEND2 mode\n");
1562
1563                 /* disable energy detect (link up) & wake up events */
1564                 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val);
1565                 if (ret < 0)
1566                         goto done;
1567
1568                 val &= ~(WUCSR_MPEN_ | WUCSR_WAKE_EN_);
1569
1570                 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val);
1571                 if (ret < 0)
1572                         goto done;
1573
1574                 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1575                 if (ret < 0)
1576                         goto done;
1577
1578                 val &= ~(PM_CTL_ED_EN_ | PM_CTL_WOL_EN_);
1579
1580                 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1581                 if (ret < 0)
1582                         goto done;
1583
1584                 ret = smsc95xx_enter_suspend2(dev);
1585                 goto done;
1586         }
1587
1588         if (pdata->wolopts & WAKE_PHY) {
1589                 ret = smsc95xx_enable_phy_wakeup_interrupts(dev,
1590                         (PHY_INT_MASK_ANEG_COMP_ | PHY_INT_MASK_LINK_DOWN_));
1591                 if (ret < 0) {
1592                         netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1593                         goto done;
1594                 }
1595
1596                 /* if link is down then configure EDPD and enter SUSPEND1,
1597                  * otherwise enter SUSPEND0 below
1598                  */
1599                 if (!link_up) {
1600                         netdev_info(dev->net, "entering SUSPEND1 mode\n");
1601                         ret = smsc95xx_enter_suspend1(dev);
1602                         goto done;
1603                 }
1604         }
1605
1606         if (pdata->wolopts & (WAKE_BCAST | WAKE_MCAST | WAKE_ARP | WAKE_UCAST)) {
1607                 u32 *filter_mask = kcalloc(32, sizeof(u32), GFP_KERNEL);
1608                 u32 command[2];
1609                 u32 offset[2];
1610                 u32 crc[4];
1611                 int wuff_filter_count =
1612                         (pdata->features & FEATURE_8_WAKEUP_FILTERS) ?
1613                         LAN9500A_WUFF_NUM : LAN9500_WUFF_NUM;
1614                 int i, filter = 0;
1615
1616                 if (!filter_mask) {
1617                         netdev_warn(dev->net, "Unable to allocate filter_mask\n");
1618                         ret = -ENOMEM;
1619                         goto done;
1620                 }
1621
1622                 memset(command, 0, sizeof(command));
1623                 memset(offset, 0, sizeof(offset));
1624                 memset(crc, 0, sizeof(crc));
1625
1626                 if (pdata->wolopts & WAKE_BCAST) {
1627                         const u8 bcast[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
1628                         netdev_info(dev->net, "enabling broadcast detection\n");
1629                         filter_mask[filter * 4] = 0x003F;
1630                         filter_mask[filter * 4 + 1] = 0x00;
1631                         filter_mask[filter * 4 + 2] = 0x00;
1632                         filter_mask[filter * 4 + 3] = 0x00;
1633                         command[filter/4] |= 0x05UL << ((filter % 4) * 8);
1634                         offset[filter/4] |= 0x00 << ((filter % 4) * 8);
1635                         crc[filter/2] |= smsc_crc(bcast, 6, filter);
1636                         filter++;
1637                 }
1638
1639                 if (pdata->wolopts & WAKE_MCAST) {
1640                         const u8 mcast[] = {0x01, 0x00, 0x5E};
1641                         netdev_info(dev->net, "enabling multicast detection\n");
1642                         filter_mask[filter * 4] = 0x0007;
1643                         filter_mask[filter * 4 + 1] = 0x00;
1644                         filter_mask[filter * 4 + 2] = 0x00;
1645                         filter_mask[filter * 4 + 3] = 0x00;
1646                         command[filter/4] |= 0x09UL << ((filter % 4) * 8);
1647                         offset[filter/4] |= 0x00  << ((filter % 4) * 8);
1648                         crc[filter/2] |= smsc_crc(mcast, 3, filter);
1649                         filter++;
1650                 }
1651
1652                 if (pdata->wolopts & WAKE_ARP) {
1653                         const u8 arp[] = {0x08, 0x06};
1654                         netdev_info(dev->net, "enabling ARP detection\n");
1655                         filter_mask[filter * 4] = 0x0003;
1656                         filter_mask[filter * 4 + 1] = 0x00;
1657                         filter_mask[filter * 4 + 2] = 0x00;
1658                         filter_mask[filter * 4 + 3] = 0x00;
1659                         command[filter/4] |= 0x05UL << ((filter % 4) * 8);
1660                         offset[filter/4] |= 0x0C << ((filter % 4) * 8);
1661                         crc[filter/2] |= smsc_crc(arp, 2, filter);
1662                         filter++;
1663                 }
1664
1665                 if (pdata->wolopts & WAKE_UCAST) {
1666                         netdev_info(dev->net, "enabling unicast detection\n");
1667                         filter_mask[filter * 4] = 0x003F;
1668                         filter_mask[filter * 4 + 1] = 0x00;
1669                         filter_mask[filter * 4 + 2] = 0x00;
1670                         filter_mask[filter * 4 + 3] = 0x00;
1671                         command[filter/4] |= 0x01UL << ((filter % 4) * 8);
1672                         offset[filter/4] |= 0x00 << ((filter % 4) * 8);
1673                         crc[filter/2] |= smsc_crc(dev->net->dev_addr, ETH_ALEN, filter);
1674                         filter++;
1675                 }
1676
1677                 for (i = 0; i < (wuff_filter_count * 4); i++) {
1678                         ret = smsc95xx_write_reg_nopm(dev, WUFF, filter_mask[i]);
1679                         if (ret < 0) {
1680                                 kfree(filter_mask);
1681                                 goto done;
1682                         }
1683                 }
1684                 kfree(filter_mask);
1685
1686                 for (i = 0; i < (wuff_filter_count / 4); i++) {
1687                         ret = smsc95xx_write_reg_nopm(dev, WUFF, command[i]);
1688                         if (ret < 0)
1689                                 goto done;
1690                 }
1691
1692                 for (i = 0; i < (wuff_filter_count / 4); i++) {
1693                         ret = smsc95xx_write_reg_nopm(dev, WUFF, offset[i]);
1694                         if (ret < 0)
1695                                 goto done;
1696                 }
1697
1698                 for (i = 0; i < (wuff_filter_count / 2); i++) {
1699                         ret = smsc95xx_write_reg_nopm(dev, WUFF, crc[i]);
1700                         if (ret < 0)
1701                                 goto done;
1702                 }
1703
1704                 /* clear any pending pattern match packet status */
1705                 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val);
1706                 if (ret < 0)
1707                         goto done;
1708
1709                 val |= WUCSR_WUFR_;
1710
1711                 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val);
1712                 if (ret < 0)
1713                         goto done;
1714         }
1715
1716         if (pdata->wolopts & WAKE_MAGIC) {
1717                 /* clear any pending magic packet status */
1718                 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val);
1719                 if (ret < 0)
1720                         goto done;
1721
1722                 val |= WUCSR_MPR_;
1723
1724                 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val);
1725                 if (ret < 0)
1726                         goto done;
1727         }
1728
1729         /* enable/disable wakeup sources */
1730         ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val);
1731         if (ret < 0)
1732                 goto done;
1733
1734         if (pdata->wolopts & (WAKE_BCAST | WAKE_MCAST | WAKE_ARP | WAKE_UCAST)) {
1735                 netdev_info(dev->net, "enabling pattern match wakeup\n");
1736                 val |= WUCSR_WAKE_EN_;
1737         } else {
1738                 netdev_info(dev->net, "disabling pattern match wakeup\n");
1739                 val &= ~WUCSR_WAKE_EN_;
1740         }
1741
1742         if (pdata->wolopts & WAKE_MAGIC) {
1743                 netdev_info(dev->net, "enabling magic packet wakeup\n");
1744                 val |= WUCSR_MPEN_;
1745         } else {
1746                 netdev_info(dev->net, "disabling magic packet wakeup\n");
1747                 val &= ~WUCSR_MPEN_;
1748         }
1749
1750         ret = smsc95xx_write_reg_nopm(dev, WUCSR, val);
1751         if (ret < 0)
1752                 goto done;
1753
1754         /* enable wol wakeup source */
1755         ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1756         if (ret < 0)
1757                 goto done;
1758
1759         val |= PM_CTL_WOL_EN_;
1760
1761         /* phy energy detect wakeup source */
1762         if (pdata->wolopts & WAKE_PHY)
1763                 val |= PM_CTL_ED_EN_;
1764
1765         ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1766         if (ret < 0)
1767                 goto done;
1768
1769         /* enable receiver to enable frame reception */
1770         smsc95xx_start_rx_path(dev, 1);
1771
1772         /* some wol options are enabled, so enter SUSPEND0 */
1773         netdev_info(dev->net, "entering SUSPEND0 mode\n");
1774         ret = smsc95xx_enter_suspend0(dev);
1775
1776 done:
1777         /*
1778          * TODO: resume() might need to handle the suspend failure
1779          * in system sleep
1780          */
1781         if (ret && PMSG_IS_AUTO(message))
1782                 usbnet_resume(intf);
1783
1784         return ret;
1785 }
1786
1787 static int smsc95xx_resume(struct usb_interface *intf)
1788 {
1789         struct usbnet *dev = usb_get_intfdata(intf);
1790         struct smsc95xx_priv *pdata;
1791         u8 suspend_flags;
1792         int ret;
1793         u32 val;
1794
1795         BUG_ON(!dev);
1796         pdata = dev->driver_priv;
1797         suspend_flags = pdata->suspend_flags;
1798
1799         netdev_dbg(dev->net, "resume suspend_flags=0x%02x\n", suspend_flags);
1800
1801         /* do this first to ensure it's cleared even in error case */
1802         pdata->suspend_flags = 0;
1803
1804         if (suspend_flags & SUSPEND_ALLMODES) {
1805                 /* clear wake-up sources */
1806                 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val);
1807                 if (ret < 0)
1808                         return ret;
1809
1810                 val &= ~(WUCSR_WAKE_EN_ | WUCSR_MPEN_);
1811
1812                 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val);
1813                 if (ret < 0)
1814                         return ret;
1815
1816                 /* clear wake-up status */
1817                 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1818                 if (ret < 0)
1819                         return ret;
1820
1821                 val &= ~PM_CTL_WOL_EN_;
1822                 val |= PM_CTL_WUPS_;
1823
1824                 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1825                 if (ret < 0)
1826                         return ret;
1827         }
1828
1829         ret = usbnet_resume(intf);
1830         if (ret < 0)
1831                 netdev_warn(dev->net, "usbnet_resume error\n");
1832
1833         phy_init_hw(pdata->phydev);
1834         return ret;
1835 }
1836
1837 static int smsc95xx_reset_resume(struct usb_interface *intf)
1838 {
1839         struct usbnet *dev = usb_get_intfdata(intf);
1840         int ret;
1841
1842         ret = smsc95xx_reset(dev);
1843         if (ret < 0)
1844                 return ret;
1845
1846         return smsc95xx_resume(intf);
1847 }
1848
1849 static void smsc95xx_rx_csum_offload(struct sk_buff *skb)
1850 {
1851         skb->csum = *(u16 *)(skb_tail_pointer(skb) - 2);
1852         skb->ip_summed = CHECKSUM_COMPLETE;
1853         skb_trim(skb, skb->len - 2);
1854 }
1855
1856 static int smsc95xx_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
1857 {
1858         /* This check is no longer done by usbnet */
1859         if (skb->len < dev->net->hard_header_len)
1860                 return 0;
1861
1862         while (skb->len > 0) {
1863                 u32 header, align_count;
1864                 struct sk_buff *ax_skb;
1865                 unsigned char *packet;
1866                 u16 size;
1867
1868                 header = get_unaligned_le32(skb->data);
1869                 skb_pull(skb, 4 + NET_IP_ALIGN);
1870                 packet = skb->data;
1871
1872                 /* get the packet length */
1873                 size = (u16)((header & RX_STS_FL_) >> 16);
1874                 align_count = (4 - ((size + NET_IP_ALIGN) % 4)) % 4;
1875
1876                 if (unlikely(header & RX_STS_ES_)) {
1877                         netif_dbg(dev, rx_err, dev->net,
1878                                   "Error header=0x%08x\n", header);
1879                         dev->net->stats.rx_errors++;
1880                         dev->net->stats.rx_dropped++;
1881
1882                         if (header & RX_STS_CRC_) {
1883                                 dev->net->stats.rx_crc_errors++;
1884                         } else {
1885                                 if (header & (RX_STS_TL_ | RX_STS_RF_))
1886                                         dev->net->stats.rx_frame_errors++;
1887
1888                                 if ((header & RX_STS_LE_) &&
1889                                         (!(header & RX_STS_FT_)))
1890                                         dev->net->stats.rx_length_errors++;
1891                         }
1892                 } else {
1893                         /* ETH_FRAME_LEN + 4(CRC) + 2(COE) + 4(Vlan) */
1894                         if (unlikely(size > (ETH_FRAME_LEN + 12))) {
1895                                 netif_dbg(dev, rx_err, dev->net,
1896                                           "size err header=0x%08x\n", header);
1897                                 return 0;
1898                         }
1899
1900                         /* last frame in this batch */
1901                         if (skb->len == size) {
1902                                 if (dev->net->features & NETIF_F_RXCSUM)
1903                                         smsc95xx_rx_csum_offload(skb);
1904                                 skb_trim(skb, skb->len - 4); /* remove fcs */
1905                                 if (truesize_mode)
1906                                         skb->truesize = size + sizeof(struct sk_buff);
1907
1908                                 return 1;
1909                         }
1910
1911                         ax_skb = skb_clone(skb, GFP_ATOMIC);
1912                         if (unlikely(!ax_skb)) {
1913                                 netdev_warn(dev->net, "Error allocating skb\n");
1914                                 return 0;
1915                         }
1916
1917                         ax_skb->len = size;
1918                         ax_skb->data = packet;
1919                         skb_set_tail_pointer(ax_skb, size);
1920
1921                         if (dev->net->features & NETIF_F_RXCSUM)
1922                                 smsc95xx_rx_csum_offload(ax_skb);
1923                         skb_trim(ax_skb, ax_skb->len - 4); /* remove fcs */
1924                         if (truesize_mode)
1925                                 ax_skb->truesize = size + sizeof(struct sk_buff);
1926
1927                         usbnet_skb_return(dev, ax_skb);
1928                 }
1929
1930                 skb_pull(skb, size);
1931
1932                 /* padding bytes before the next frame starts */
1933                 if (skb->len)
1934                         skb_pull(skb, align_count);
1935         }
1936
1937         return 1;
1938 }
1939
1940 static u32 smsc95xx_calc_csum_preamble(struct sk_buff *skb)
1941 {
1942         u16 low_16 = (u16)skb_checksum_start_offset(skb);
1943         u16 high_16 = low_16 + skb->csum_offset;
1944         return (high_16 << 16) | low_16;
1945 }
1946
1947 /* The TX CSUM won't work if the checksum lies in the last 4 bytes of the
1948  * transmission. This is fairly unlikely, only seems to trigger with some
1949  * short TCP ACK packets sent.
1950  *
1951  * Note, this calculation should probably check for the alignment of the
1952  * data as well, but a straight check for csum being in the last four bytes
1953  * of the packet should be ok for now.
1954  */
1955 static bool smsc95xx_can_tx_checksum(struct sk_buff *skb)
1956 {
1957        unsigned int len = skb->len - skb_checksum_start_offset(skb);
1958
1959        if (skb->len <= 45)
1960                return false;
1961        return skb->csum_offset < (len - (4 + 1));
1962 }
1963
1964 static struct sk_buff *smsc95xx_tx_fixup(struct usbnet *dev,
1965                                          struct sk_buff *skb, gfp_t flags)
1966 {
1967         bool csum = skb->ip_summed == CHECKSUM_PARTIAL;
1968         int overhead = csum ? SMSC95XX_TX_OVERHEAD_CSUM : SMSC95XX_TX_OVERHEAD;
1969         u32 tx_cmd_a, tx_cmd_b;
1970         void *ptr;
1971
1972         /* We do not advertise SG, so skbs should be already linearized */
1973         BUG_ON(skb_shinfo(skb)->nr_frags);
1974
1975         /* Make writable and expand header space by overhead if required */
1976         if (skb_cow_head(skb, overhead)) {
1977                 /* Must deallocate here as returning NULL to indicate error
1978                  * means the skb won't be deallocated in the caller.
1979                  */
1980                 dev_kfree_skb_any(skb);
1981                 return NULL;
1982         }
1983
1984         tx_cmd_b = (u32)skb->len;
1985         tx_cmd_a = tx_cmd_b | TX_CMD_A_FIRST_SEG_ | TX_CMD_A_LAST_SEG_;
1986
1987         if (csum) {
1988                 if (!smsc95xx_can_tx_checksum(skb)) {
1989                         /* workaround - hardware tx checksum does not work
1990                          * properly with extremely small packets */
1991                         long csstart = skb_checksum_start_offset(skb);
1992                         __wsum calc = csum_partial(skb->data + csstart,
1993                                 skb->len - csstart, 0);
1994                         *((__sum16 *)(skb->data + csstart
1995                                 + skb->csum_offset)) = csum_fold(calc);
1996
1997                         csum = false;
1998                 } else {
1999                         u32 csum_preamble = smsc95xx_calc_csum_preamble(skb);
2000                         ptr = skb_push(skb, 4);
2001                         put_unaligned_le32(csum_preamble, ptr);
2002
2003                         tx_cmd_a += 4;
2004                         tx_cmd_b += 4;
2005                         tx_cmd_b |= TX_CMD_B_CSUM_ENABLE;
2006                 }
2007         }
2008
2009         ptr = skb_push(skb, 8);
2010         put_unaligned_le32(tx_cmd_a, ptr);
2011         put_unaligned_le32(tx_cmd_b, ptr+4);
2012
2013         return skb;
2014 }
2015
2016 static int smsc95xx_manage_power(struct usbnet *dev, int on)
2017 {
2018         struct smsc95xx_priv *pdata = dev->driver_priv;
2019
2020         dev->intf->needs_remote_wakeup = on;
2021
2022         if (pdata->features & FEATURE_REMOTE_WAKEUP)
2023                 return 0;
2024
2025         /* this chip revision isn't capable of remote wakeup */
2026         netdev_info(dev->net, "hardware isn't capable of remote wakeup\n");
2027
2028         if (on)
2029                 usb_autopm_get_interface_no_resume(dev->intf);
2030         else
2031                 usb_autopm_put_interface(dev->intf);
2032
2033         return 0;
2034 }
2035
2036 static const struct driver_info smsc95xx_info = {
2037         .description    = "smsc95xx USB 2.0 Ethernet",
2038         .bind           = smsc95xx_bind,
2039         .unbind         = smsc95xx_unbind,
2040         .link_reset     = smsc95xx_link_reset,
2041         .reset          = smsc95xx_reset,
2042         .check_connect  = smsc95xx_start_phy,
2043         .stop           = smsc95xx_stop,
2044         .rx_fixup       = smsc95xx_rx_fixup,
2045         .tx_fixup       = smsc95xx_tx_fixup,
2046         .status         = smsc95xx_status,
2047         .manage_power   = smsc95xx_manage_power,
2048         .flags          = FLAG_ETHER | FLAG_SEND_ZLP | FLAG_LINK_INTR,
2049 };
2050
2051 static const struct usb_device_id products[] = {
2052         {
2053                 /* SMSC9500 USB Ethernet Device */
2054                 USB_DEVICE(0x0424, 0x9500),
2055                 .driver_info = (unsigned long) &smsc95xx_info,
2056         },
2057         {
2058                 /* SMSC9505 USB Ethernet Device */
2059                 USB_DEVICE(0x0424, 0x9505),
2060                 .driver_info = (unsigned long) &smsc95xx_info,
2061         },
2062         {
2063                 /* SMSC9500A USB Ethernet Device */
2064                 USB_DEVICE(0x0424, 0x9E00),
2065                 .driver_info = (unsigned long) &smsc95xx_info,
2066         },
2067         {
2068                 /* SMSC9505A USB Ethernet Device */
2069                 USB_DEVICE(0x0424, 0x9E01),
2070                 .driver_info = (unsigned long) &smsc95xx_info,
2071         },
2072         {
2073                 /* SMSC9512/9514 USB Hub & Ethernet Device */
2074                 USB_DEVICE(0x0424, 0xec00),
2075                 .driver_info = (unsigned long) &smsc95xx_info,
2076         },
2077         {
2078                 /* SMSC9500 USB Ethernet Device (SAL10) */
2079                 USB_DEVICE(0x0424, 0x9900),
2080                 .driver_info = (unsigned long) &smsc95xx_info,
2081         },
2082         {
2083                 /* SMSC9505 USB Ethernet Device (SAL10) */
2084                 USB_DEVICE(0x0424, 0x9901),
2085                 .driver_info = (unsigned long) &smsc95xx_info,
2086         },
2087         {
2088                 /* SMSC9500A USB Ethernet Device (SAL10) */
2089                 USB_DEVICE(0x0424, 0x9902),
2090                 .driver_info = (unsigned long) &smsc95xx_info,
2091         },
2092         {
2093                 /* SMSC9505A USB Ethernet Device (SAL10) */
2094                 USB_DEVICE(0x0424, 0x9903),
2095                 .driver_info = (unsigned long) &smsc95xx_info,
2096         },
2097         {
2098                 /* SMSC9512/9514 USB Hub & Ethernet Device (SAL10) */
2099                 USB_DEVICE(0x0424, 0x9904),
2100                 .driver_info = (unsigned long) &smsc95xx_info,
2101         },
2102         {
2103                 /* SMSC9500A USB Ethernet Device (HAL) */
2104                 USB_DEVICE(0x0424, 0x9905),
2105                 .driver_info = (unsigned long) &smsc95xx_info,
2106         },
2107         {
2108                 /* SMSC9505A USB Ethernet Device (HAL) */
2109                 USB_DEVICE(0x0424, 0x9906),
2110                 .driver_info = (unsigned long) &smsc95xx_info,
2111         },
2112         {
2113                 /* SMSC9500 USB Ethernet Device (Alternate ID) */
2114                 USB_DEVICE(0x0424, 0x9907),
2115                 .driver_info = (unsigned long) &smsc95xx_info,
2116         },
2117         {
2118                 /* SMSC9500A USB Ethernet Device (Alternate ID) */
2119                 USB_DEVICE(0x0424, 0x9908),
2120                 .driver_info = (unsigned long) &smsc95xx_info,
2121         },
2122         {
2123                 /* SMSC9512/9514 USB Hub & Ethernet Device (Alternate ID) */
2124                 USB_DEVICE(0x0424, 0x9909),
2125                 .driver_info = (unsigned long) &smsc95xx_info,
2126         },
2127         {
2128                 /* SMSC LAN9530 USB Ethernet Device */
2129                 USB_DEVICE(0x0424, 0x9530),
2130                 .driver_info = (unsigned long) &smsc95xx_info,
2131         },
2132         {
2133                 /* SMSC LAN9730 USB Ethernet Device */
2134                 USB_DEVICE(0x0424, 0x9730),
2135                 .driver_info = (unsigned long) &smsc95xx_info,
2136         },
2137         {
2138                 /* SMSC LAN89530 USB Ethernet Device */
2139                 USB_DEVICE(0x0424, 0x9E08),
2140                 .driver_info = (unsigned long) &smsc95xx_info,
2141         },
2142         { },            /* END */
2143 };
2144 MODULE_DEVICE_TABLE(usb, products);
2145
2146 static struct usb_driver smsc95xx_driver = {
2147         .name           = "smsc95xx",
2148         .id_table       = products,
2149         .probe          = usbnet_probe,
2150         .suspend        = smsc95xx_suspend,
2151         .resume         = smsc95xx_resume,
2152         .reset_resume   = smsc95xx_reset_resume,
2153         .disconnect     = usbnet_disconnect,
2154         .disable_hub_initiated_lpm = 1,
2155         .supports_autosuspend = 1,
2156 };
2157
2158 module_usb_driver(smsc95xx_driver);
2159
2160 MODULE_AUTHOR("Nancy Lin");
2161 MODULE_AUTHOR("Steve Glendinning <steve.glendinning@shawell.net>");
2162 MODULE_DESCRIPTION("SMSC95XX USB 2.0 Ethernet Devices");
2163 MODULE_LICENSE("GPL");