drivers/net/usb/smsc75xx.c

   1  /***************************************************************************
   2  *
   3  * Copyright (C) 2007-2010 SMSC
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License
   7  * as published by the Free Software Foundation; either version 2
   8  * of the License, or (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, see <http://www.gnu.org/licenses/>.
  17  *
  18  *****************************************************************************/
  19
  20 #include <linux/module.h>
  21 #include <linux/kmod.h>
  22 #include <linux/netdevice.h>
  23 #include <linux/etherdevice.h>
  24 #include <linux/ethtool.h>
  25 #include <linux/mii.h>
  26 #include <linux/usb.h>
  27 #include <linux/bitrev.h>
  28 #include <linux/crc16.h>
  29 #include <linux/crc32.h>
  30 #include <linux/usb/usbnet.h>
  31 #include <linux/slab.h>
  32 #include "smsc75xx.h"
  33
  34 #define SMSC_CHIPNAME                   "smsc75xx"
  35 #define SMSC_DRIVER_VERSION             "1.0.0"
  36 #define HS_USB_PKT_SIZE                 (512)
  37 #define FS_USB_PKT_SIZE                 (64)
  38 #define DEFAULT_HS_BURST_CAP_SIZE       (16 * 1024 + 5 * HS_USB_PKT_SIZE)
  39 #define DEFAULT_FS_BURST_CAP_SIZE       (6 * 1024 + 33 * FS_USB_PKT_SIZE)
  40 #define DEFAULT_BULK_IN_DELAY           (0x00002000)
  41 #define MAX_SINGLE_PACKET_SIZE          (9000)
  42 #define LAN75XX_EEPROM_MAGIC            (0x7500)
  43 #define EEPROM_MAC_OFFSET               (0x01)
  44 #define DEFAULT_TX_CSUM_ENABLE          (true)
  45 #define DEFAULT_RX_CSUM_ENABLE          (true)
  46 #define SMSC75XX_INTERNAL_PHY_ID        (1)
  47 #define SMSC75XX_TX_OVERHEAD            (8)
  48 #define MAX_RX_FIFO_SIZE                (20 * 1024)
  49 #define MAX_TX_FIFO_SIZE                (12 * 1024)
  50 #define USB_VENDOR_ID_SMSC              (0x0424)
  51 #define USB_PRODUCT_ID_LAN7500          (0x7500)
  52 #define USB_PRODUCT_ID_LAN7505          (0x7505)
  53 #define RXW_PADDING                     2
  54 #define SUPPORTED_WAKE                  (WAKE_PHY | WAKE_UCAST | WAKE_BCAST | \
  55                                          WAKE_MCAST | WAKE_ARP | WAKE_MAGIC)
  56
  57 #define SUSPEND_SUSPEND0                (0x01)
  58 #define SUSPEND_SUSPEND1                (0x02)
  59 #define SUSPEND_SUSPEND2                (0x04)
  60 #define SUSPEND_SUSPEND3                (0x08)
  61 #define SUSPEND_ALLMODES                (SUSPEND_SUSPEND0 | SUSPEND_SUSPEND1 | \
  62                                          SUSPEND_SUSPEND2 | SUSPEND_SUSPEND3)
  63
  64 struct smsc75xx_priv {
  65         struct usbnet *dev;
  66         u32 rfe_ctl;
  67         u32 wolopts;
  68         u32 multicast_hash_table[DP_SEL_VHF_HASH_LEN];
  69         struct mutex dataport_mutex;
  70         spinlock_t rfe_ctl_lock;
  71         struct work_struct set_multicast;
  72         u8 suspend_flags;
  73 };
  74
  75 struct usb_context {
  76         struct usb_ctrlrequest req;
  77         struct usbnet *dev;
  78 };
  79
  80 static bool turbo_mode = true;
  81 module_param(turbo_mode, bool, 0644);
  82 MODULE_PARM_DESC(turbo_mode, "Enable multiple frames per Rx transaction");
  83
  84 static int __must_check __smsc75xx_read_reg(struct usbnet *dev, u32 index,
  85                                             u32 *data, int in_pm)
  86 {
  87         u32 buf;
  88         int ret;
  89         int (*fn)(struct usbnet *, u8, u8, u16, u16, void *, u16);
  90
  91         BUG_ON(!dev);
  92
  93         if (!in_pm)
  94                 fn = usbnet_read_cmd;
  95         else
  96                 fn = usbnet_read_cmd_nopm;
  97
  98         ret = fn(dev, USB_VENDOR_REQUEST_READ_REGISTER, USB_DIR_IN
  99                  | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 100                  0, index, &buf, 4);
 101         if (unlikely(ret < 0))
 102                 netdev_warn(dev->net, "Failed to read reg index 0x%08x: %d\n",
 103                             index, ret);
 104
 105         le32_to_cpus(&buf);
 106         *data = buf;
 107
 108         return ret;
 109 }
 110
 111 static int __must_check __smsc75xx_write_reg(struct usbnet *dev, u32 index,
 112                                              u32 data, int in_pm)
 113 {
 114         u32 buf;
 115         int ret;
 116         int (*fn)(struct usbnet *, u8, u8, u16, u16, const void *, u16);
 117
 118         BUG_ON(!dev);
 119
 120         if (!in_pm)
 121                 fn = usbnet_write_cmd;
 122         else
 123                 fn = usbnet_write_cmd_nopm;
 124
 125         buf = data;
 126         cpu_to_le32s(&buf);
 127
 128         ret = fn(dev, USB_VENDOR_REQUEST_WRITE_REGISTER, USB_DIR_OUT
 129                  | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 130                  0, index, &buf, 4);
 131         if (unlikely(ret < 0))
 132                 netdev_warn(dev->net, "Failed to write reg index 0x%08x: %d\n",
 133                             index, ret);
 134
 135         return ret;
 136 }
 137
 138 static int __must_check smsc75xx_read_reg_nopm(struct usbnet *dev, u32 index,
 139                                                u32 *data)
 140 {
 141         return __smsc75xx_read_reg(dev, index, data, 1);
 142 }
 143
 144 static int __must_check smsc75xx_write_reg_nopm(struct usbnet *dev, u32 index,
 145                                                 u32 data)
 146 {
 147         return __smsc75xx_write_reg(dev, index, data, 1);
 148 }
 149
 150 static int __must_check smsc75xx_read_reg(struct usbnet *dev, u32 index,
 151                                           u32 *data)
 152 {
 153         return __smsc75xx_read_reg(dev, index, data, 0);
 154 }
 155
 156 static int __must_check smsc75xx_write_reg(struct usbnet *dev, u32 index,
 157                                            u32 data)
 158 {
 159         return __smsc75xx_write_reg(dev, index, data, 0);
 160 }
 161
 162 /* Loop until the read is completed with timeout
 163  * called with phy_mutex held */
 164 static __must_check int __smsc75xx_phy_wait_not_busy(struct usbnet *dev,
 165                                                      int in_pm)
 166 {
 167         unsigned long start_time = jiffies;
 168         u32 val;
 169         int ret;
 170
 171         do {
 172                 ret = __smsc75xx_read_reg(dev, MII_ACCESS, &val, in_pm);
 173                 if (ret < 0) {
 174                         netdev_warn(dev->net, "Error reading MII_ACCESS\n");
 175                         return ret;
 176                 }
 177
 178                 if (!(val & MII_ACCESS_BUSY))
 179                         return 0;
 180         } while (!time_after(jiffies, start_time + HZ));
 181
 182         return -EIO;
 183 }
 184
 185 static int __smsc75xx_mdio_read(struct net_device *netdev, int phy_id, int idx,
 186                                 int in_pm)
 187 {
 188         struct usbnet *dev = netdev_priv(netdev);
 189         u32 val, addr;
 190         int ret;
 191
 192         mutex_lock(&dev->phy_mutex);
 193
 194         /* confirm MII not busy */
 195         ret = __smsc75xx_phy_wait_not_busy(dev, in_pm);
 196         if (ret < 0) {
 197                 netdev_warn(dev->net, "MII is busy in smsc75xx_mdio_read\n");
 198                 goto done;
 199         }
 200
 201         /* set the address, index & direction (read from PHY) */
 202         phy_id &= dev->mii.phy_id_mask;
 203         idx &= dev->mii.reg_num_mask;
 204         addr = ((phy_id << MII_ACCESS_PHY_ADDR_SHIFT) & MII_ACCESS_PHY_ADDR)
 205                 | ((idx << MII_ACCESS_REG_ADDR_SHIFT) & MII_ACCESS_REG_ADDR)
 206                 | MII_ACCESS_READ | MII_ACCESS_BUSY;
 207         ret = __smsc75xx_write_reg(dev, MII_ACCESS, addr, in_pm);
 208         if (ret < 0) {
 209                 netdev_warn(dev->net, "Error writing MII_ACCESS\n");
 210                 goto done;
 211         }
 212
 213         ret = __smsc75xx_phy_wait_not_busy(dev, in_pm);
 214         if (ret < 0) {
 215                 netdev_warn(dev->net, "Timed out reading MII reg %02X\n", idx);
 216                 goto done;
 217         }
 218
 219         ret = __smsc75xx_read_reg(dev, MII_DATA, &val, in_pm);
 220         if (ret < 0) {
 221                 netdev_warn(dev->net, "Error reading MII_DATA\n");
 222                 goto done;
 223         }
 224
 225         ret = (u16)(val & 0xFFFF);
 226
 227 done:
 228         mutex_unlock(&dev->phy_mutex);
 229         return ret;
 230 }
 231
 232 static void __smsc75xx_mdio_write(struct net_device *netdev, int phy_id,
 233                                   int idx, int regval, int in_pm)
 234 {
 235         struct usbnet *dev = netdev_priv(netdev);
 236         u32 val, addr;
 237         int ret;
 238
 239         mutex_lock(&dev->phy_mutex);
 240
 241         /* confirm MII not busy */
 242         ret = __smsc75xx_phy_wait_not_busy(dev, in_pm);
 243         if (ret < 0) {
 244                 netdev_warn(dev->net, "MII is busy in smsc75xx_mdio_write\n");
 245                 goto done;
 246         }
 247
 248         val = regval;
 249         ret = __smsc75xx_write_reg(dev, MII_DATA, val, in_pm);
 250         if (ret < 0) {
 251                 netdev_warn(dev->net, "Error writing MII_DATA\n");
 252                 goto done;
 253         }
 254
 255         /* set the address, index & direction (write to PHY) */
 256         phy_id &= dev->mii.phy_id_mask;
 257         idx &= dev->mii.reg_num_mask;
 258         addr = ((phy_id << MII_ACCESS_PHY_ADDR_SHIFT) & MII_ACCESS_PHY_ADDR)
 259                 | ((idx << MII_ACCESS_REG_ADDR_SHIFT) & MII_ACCESS_REG_ADDR)
 260                 | MII_ACCESS_WRITE | MII_ACCESS_BUSY;
 261         ret = __smsc75xx_write_reg(dev, MII_ACCESS, addr, in_pm);
 262         if (ret < 0) {
 263                 netdev_warn(dev->net, "Error writing MII_ACCESS\n");
 264                 goto done;
 265         }
 266
 267         ret = __smsc75xx_phy_wait_not_busy(dev, in_pm);
 268         if (ret < 0) {
 269                 netdev_warn(dev->net, "Timed out writing MII reg %02X\n", idx);
 270                 goto done;
 271         }
 272
 273 done:
 274         mutex_unlock(&dev->phy_mutex);
 275 }
 276
 277 static int smsc75xx_mdio_read_nopm(struct net_device *netdev, int phy_id,
 278                                    int idx)
 279 {
 280         return __smsc75xx_mdio_read(netdev, phy_id, idx, 1);
 281 }
 282
 283 static void smsc75xx_mdio_write_nopm(struct net_device *netdev, int phy_id,
 284                                      int idx, int regval)
 285 {
 286         __smsc75xx_mdio_write(netdev, phy_id, idx, regval, 1);
 287 }
 288
 289 static int smsc75xx_mdio_read(struct net_device *netdev, int phy_id, int idx)
 290 {
 291         return __smsc75xx_mdio_read(netdev, phy_id, idx, 0);
 292 }
 293
 294 static void smsc75xx_mdio_write(struct net_device *netdev, int phy_id, int idx,
 295                                 int regval)
 296 {
 297         __smsc75xx_mdio_write(netdev, phy_id, idx, regval, 0);
 298 }
 299
 300 static int smsc75xx_wait_eeprom(struct usbnet *dev)
 301 {
 302         unsigned long start_time = jiffies;
 303         u32 val;
 304         int ret;
 305
 306         do {
 307                 ret = smsc75xx_read_reg(dev, E2P_CMD, &val);
 308                 if (ret < 0) {
 309                         netdev_warn(dev->net, "Error reading E2P_CMD\n");
 310                         return ret;
 311                 }
 312
 313                 if (!(val & E2P_CMD_BUSY) || (val & E2P_CMD_TIMEOUT))
 314                         break;
 315                 udelay(40);
 316         } while (!time_after(jiffies, start_time + HZ));
 317
 318         if (val & (E2P_CMD_TIMEOUT | E2P_CMD_BUSY)) {
 319                 netdev_warn(dev->net, "EEPROM read operation timeout\n");
 320                 return -EIO;
 321         }
 322
 323         return 0;
 324 }
 325
 326 static int smsc75xx_eeprom_confirm_not_busy(struct usbnet *dev)
 327 {
 328         unsigned long start_time = jiffies;
 329         u32 val;
 330         int ret;
 331
 332         do {
 333                 ret = smsc75xx_read_reg(dev, E2P_CMD, &val);
 334                 if (ret < 0) {
 335                         netdev_warn(dev->net, "Error reading E2P_CMD\n");
 336                         return ret;
 337                 }
 338
 339                 if (!(val & E2P_CMD_BUSY))
 340                         return 0;
 341
 342                 udelay(40);
 343         } while (!time_after(jiffies, start_time + HZ));
 344
 345         netdev_warn(dev->net, "EEPROM is busy\n");
 346         return -EIO;
 347 }
 348
 349 static int smsc75xx_read_eeprom(struct usbnet *dev, u32 offset, u32 length,
 350                                 u8 *data)
 351 {
 352         u32 val;
 353         int i, ret;
 354
 355         BUG_ON(!dev);
 356         BUG_ON(!data);
 357
 358         ret = smsc75xx_eeprom_confirm_not_busy(dev);
 359         if (ret)
 360                 return ret;
 361
 362         for (i = 0; i < length; i++) {
 363                 val = E2P_CMD_BUSY | E2P_CMD_READ | (offset & E2P_CMD_ADDR);
 364                 ret = smsc75xx_write_reg(dev, E2P_CMD, val);
 365                 if (ret < 0) {
 366                         netdev_warn(dev->net, "Error writing E2P_CMD\n");
 367                         return ret;
 368                 }
 369
 370                 ret = smsc75xx_wait_eeprom(dev);
 371                 if (ret < 0)
 372                         return ret;
 373
 374                 ret = smsc75xx_read_reg(dev, E2P_DATA, &val);
 375                 if (ret < 0) {
 376                         netdev_warn(dev->net, "Error reading E2P_DATA\n");
 377                         return ret;
 378                 }
 379
 380                 data[i] = val & 0xFF;
 381                 offset++;
 382         }
 383
 384         return 0;
 385 }
 386
 387 static int smsc75xx_write_eeprom(struct usbnet *dev, u32 offset, u32 length,
 388                                  u8 *data)
 389 {
 390         u32 val;
 391         int i, ret;
 392
 393         BUG_ON(!dev);
 394         BUG_ON(!data);
 395
 396         ret = smsc75xx_eeprom_confirm_not_busy(dev);
 397         if (ret)
 398                 return ret;
 399
 400         /* Issue write/erase enable command */
 401         val = E2P_CMD_BUSY | E2P_CMD_EWEN;
 402         ret = smsc75xx_write_reg(dev, E2P_CMD, val);
 403         if (ret < 0) {
 404                 netdev_warn(dev->net, "Error writing E2P_CMD\n");
 405                 return ret;
 406         }
 407
 408         ret = smsc75xx_wait_eeprom(dev);
 409         if (ret < 0)
 410                 return ret;
 411
 412         for (i = 0; i < length; i++) {
 413
 414                 /* Fill data register */
 415                 val = data[i];
 416                 ret = smsc75xx_write_reg(dev, E2P_DATA, val);
 417                 if (ret < 0) {
 418                         netdev_warn(dev->net, "Error writing E2P_DATA\n");
 419                         return ret;
 420                 }
 421
 422                 /* Send "write" command */
 423                 val = E2P_CMD_BUSY | E2P_CMD_WRITE | (offset & E2P_CMD_ADDR);
 424                 ret = smsc75xx_write_reg(dev, E2P_CMD, val);
 425                 if (ret < 0) {
 426                         netdev_warn(dev->net, "Error writing E2P_CMD\n");
 427                         return ret;
 428                 }
 429
 430                 ret = smsc75xx_wait_eeprom(dev);
 431                 if (ret < 0)
 432                         return ret;
 433
 434                 offset++;
 435         }
 436
 437         return 0;
 438 }
 439
 440 static int smsc75xx_dataport_wait_not_busy(struct usbnet *dev)
 441 {
 442         int i, ret;
 443
 444         for (i = 0; i < 100; i++) {
 445                 u32 dp_sel;
 446                 ret = smsc75xx_read_reg(dev, DP_SEL, &dp_sel);
 447                 if (ret < 0) {
 448                         netdev_warn(dev->net, "Error reading DP_SEL\n");
 449                         return ret;
 450                 }
 451
 452                 if (dp_sel & DP_SEL_DPRDY)
 453                         return 0;
 454
 455                 udelay(40);
 456         }
 457
 458         netdev_warn(dev->net, "smsc75xx_dataport_wait_not_busy timed out\n");
 459
 460         return -EIO;
 461 }
 462
 463 static int smsc75xx_dataport_write(struct usbnet *dev, u32 ram_select, u32 addr,
 464                                    u32 length, u32 *buf)
 465 {
 466         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 467         u32 dp_sel;
 468         int i, ret;
 469
 470         mutex_lock(&pdata->dataport_mutex);
 471
 472         ret = smsc75xx_dataport_wait_not_busy(dev);
 473         if (ret < 0) {
 474                 netdev_warn(dev->net, "smsc75xx_dataport_write busy on entry\n");
 475                 goto done;
 476         }
 477
 478         ret = smsc75xx_read_reg(dev, DP_SEL, &dp_sel);
 479         if (ret < 0) {
 480                 netdev_warn(dev->net, "Error reading DP_SEL\n");
 481                 goto done;
 482         }
 483
 484         dp_sel &= ~DP_SEL_RSEL;
 485         dp_sel |= ram_select;
 486         ret = smsc75xx_write_reg(dev, DP_SEL, dp_sel);
 487         if (ret < 0) {
 488                 netdev_warn(dev->net, "Error writing DP_SEL\n");
 489                 goto done;
 490         }
 491
 492         for (i = 0; i < length; i++) {
 493                 ret = smsc75xx_write_reg(dev, DP_ADDR, addr + i);
 494                 if (ret < 0) {
 495                         netdev_warn(dev->net, "Error writing DP_ADDR\n");
 496                         goto done;
 497                 }
 498
 499                 ret = smsc75xx_write_reg(dev, DP_DATA, buf[i]);
 500                 if (ret < 0) {
 501                         netdev_warn(dev->net, "Error writing DP_DATA\n");
 502                         goto done;
 503                 }
 504
 505                 ret = smsc75xx_write_reg(dev, DP_CMD, DP_CMD_WRITE);
 506                 if (ret < 0) {
 507                         netdev_warn(dev->net, "Error writing DP_CMD\n");
 508                         goto done;
 509                 }
 510
 511                 ret = smsc75xx_dataport_wait_not_busy(dev);
 512                 if (ret < 0) {
 513                         netdev_warn(dev->net, "smsc75xx_dataport_write timeout\n");
 514                         goto done;
 515                 }
 516         }
 517
 518 done:
 519         mutex_unlock(&pdata->dataport_mutex);
 520         return ret;
 521 }
 522
 523 /* returns hash bit number for given MAC address */
 524 static u32 smsc75xx_hash(char addr[ETH_ALEN])
 525 {
 526         return (ether_crc(ETH_ALEN, addr) >> 23) & 0x1ff;
 527 }
 528
 529 static void smsc75xx_deferred_multicast_write(struct work_struct *param)
 530 {
 531         struct smsc75xx_priv *pdata =
 532                 container_of(param, struct smsc75xx_priv, set_multicast);
 533         struct usbnet *dev = pdata->dev;
 534         int ret;
 535
 536         netif_dbg(dev, drv, dev->net, "deferred multicast write 0x%08x\n",
 537                   pdata->rfe_ctl);
 538
 539         smsc75xx_dataport_write(dev, DP_SEL_VHF, DP_SEL_VHF_VLAN_LEN,
 540                 DP_SEL_VHF_HASH_LEN, pdata->multicast_hash_table);
 541
 542         ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
 543         if (ret < 0)
 544                 netdev_warn(dev->net, "Error writing RFE_CRL\n");
 545 }
 546
 547 static void smsc75xx_set_multicast(struct net_device *netdev)
 548 {
 549         struct usbnet *dev = netdev_priv(netdev);
 550         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 551         unsigned long flags;
 552         int i;
 553
 554         spin_lock_irqsave(&pdata->rfe_ctl_lock, flags);
 555
 556         pdata->rfe_ctl &=
 557                 ~(RFE_CTL_AU | RFE_CTL_AM | RFE_CTL_DPF | RFE_CTL_MHF);
 558         pdata->rfe_ctl |= RFE_CTL_AB;
 559
 560         for (i = 0; i < DP_SEL_VHF_HASH_LEN; i++)
 561                 pdata->multicast_hash_table[i] = 0;
 562
 563         if (dev->net->flags & IFF_PROMISC) {
 564                 netif_dbg(dev, drv, dev->net, "promiscuous mode enabled\n");
 565                 pdata->rfe_ctl |= RFE_CTL_AM | RFE_CTL_AU;
 566         } else if (dev->net->flags & IFF_ALLMULTI) {
 567                 netif_dbg(dev, drv, dev->net, "receive all multicast enabled\n");
 568                 pdata->rfe_ctl |= RFE_CTL_AM | RFE_CTL_DPF;
 569         } else if (!netdev_mc_empty(dev->net)) {
 570                 struct netdev_hw_addr *ha;
 571
 572                 netif_dbg(dev, drv, dev->net, "receive multicast hash filter\n");
 573
 574                 pdata->rfe_ctl |= RFE_CTL_MHF | RFE_CTL_DPF;
 575
 576                 netdev_for_each_mc_addr(ha, netdev) {
 577                         u32 bitnum = smsc75xx_hash(ha->addr);
 578                         pdata->multicast_hash_table[bitnum / 32] |=
 579                                 (1 << (bitnum % 32));
 580                 }
 581         } else {
 582                 netif_dbg(dev, drv, dev->net, "receive own packets only\n");
 583                 pdata->rfe_ctl |= RFE_CTL_DPF;
 584         }
 585
 586         spin_unlock_irqrestore(&pdata->rfe_ctl_lock, flags);
 587
 588         /* defer register writes to a sleepable context */
 589         schedule_work(&pdata->set_multicast);
 590 }
 591
 592 static int smsc75xx_update_flowcontrol(struct usbnet *dev, u8 duplex,
 593                                             u16 lcladv, u16 rmtadv)
 594 {
 595         u32 flow = 0, fct_flow = 0;
 596         int ret;
 597
 598         if (duplex == DUPLEX_FULL) {
 599                 u8 cap = mii_resolve_flowctrl_fdx(lcladv, rmtadv);
 600
 601                 if (cap & FLOW_CTRL_TX) {
 602                         flow = (FLOW_TX_FCEN | 0xFFFF);
 603                         /* set fct_flow thresholds to 20% and 80% */
 604                         fct_flow = (8 << 8) | 32;
 605                 }
 606
 607                 if (cap & FLOW_CTRL_RX)
 608                         flow |= FLOW_RX_FCEN;
 609
 610                 netif_dbg(dev, link, dev->net, "rx pause %s, tx pause %s\n",
 611                           (cap & FLOW_CTRL_RX ? "enabled" : "disabled"),
 612                           (cap & FLOW_CTRL_TX ? "enabled" : "disabled"));
 613         } else {
 614                 netif_dbg(dev, link, dev->net, "half duplex\n");
 615         }
 616
 617         ret = smsc75xx_write_reg(dev, FLOW, flow);
 618         if (ret < 0) {
 619                 netdev_warn(dev->net, "Error writing FLOW\n");
 620                 return ret;
 621         }
 622
 623         ret = smsc75xx_write_reg(dev, FCT_FLOW, fct_flow);
 624         if (ret < 0) {
 625                 netdev_warn(dev->net, "Error writing FCT_FLOW\n");
 626                 return ret;
 627         }
 628
 629         return 0;
 630 }
 631
 632 static int smsc75xx_link_reset(struct usbnet *dev)
 633 {
 634         struct mii_if_info *mii = &dev->mii;
 635         struct ethtool_cmd ecmd = { .cmd = ETHTOOL_GSET };
 636         u16 lcladv, rmtadv;
 637         int ret;
 638
 639         /* write to clear phy interrupt status */
 640         smsc75xx_mdio_write(dev->net, mii->phy_id, PHY_INT_SRC,
 641                 PHY_INT_SRC_CLEAR_ALL);
 642
 643         ret = smsc75xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL);
 644         if (ret < 0) {
 645                 netdev_warn(dev->net, "Error writing INT_STS\n");
 646                 return ret;
 647         }
 648
 649         mii_check_media(mii, 1, 1);
 650         mii_ethtool_gset(&dev->mii, &ecmd);
 651         lcladv = smsc75xx_mdio_read(dev->net, mii->phy_id, MII_ADVERTISE);
 652         rmtadv = smsc75xx_mdio_read(dev->net, mii->phy_id, MII_LPA);
 653
 654         netif_dbg(dev, link, dev->net, "speed: %u duplex: %d lcladv: %04x rmtadv: %04x\n",
 655                   ethtool_cmd_speed(&ecmd), ecmd.duplex, lcladv, rmtadv);
 656
 657         return smsc75xx_update_flowcontrol(dev, ecmd.duplex, lcladv, rmtadv);
 658 }
 659
 660 static void smsc75xx_status(struct usbnet *dev, struct urb *urb)
 661 {
 662         u32 intdata;
 663
 664         if (urb->actual_length != 4) {
 665                 netdev_warn(dev->net, "unexpected urb length %d\n",
 666                             urb->actual_length);
 667                 return;
 668         }
 669
 670         memcpy(&intdata, urb->transfer_buffer, 4);
 671         le32_to_cpus(&intdata);
 672
 673         netif_dbg(dev, link, dev->net, "intdata: 0x%08X\n", intdata);
 674
 675         if (intdata & INT_ENP_PHY_INT)
 676                 usbnet_defer_kevent(dev, EVENT_LINK_RESET);
 677         else
 678                 netdev_warn(dev->net, "unexpected interrupt, intdata=0x%08X\n",
 679                             intdata);
 680 }
 681
 682 static int smsc75xx_ethtool_get_eeprom_len(struct net_device *net)
 683 {
 684         return MAX_EEPROM_SIZE;
 685 }
 686
 687 static int smsc75xx_ethtool_get_eeprom(struct net_device *netdev,
 688                                        struct ethtool_eeprom *ee, u8 *data)
 689 {
 690         struct usbnet *dev = netdev_priv(netdev);
 691
 692         ee->magic = LAN75XX_EEPROM_MAGIC;
 693
 694         return smsc75xx_read_eeprom(dev, ee->offset, ee->len, data);
 695 }
 696
 697 static int smsc75xx_ethtool_set_eeprom(struct net_device *netdev,
 698                                        struct ethtool_eeprom *ee, u8 *data)
 699 {
 700         struct usbnet *dev = netdev_priv(netdev);
 701
 702         if (ee->magic != LAN75XX_EEPROM_MAGIC) {
 703                 netdev_warn(dev->net, "EEPROM: magic value mismatch: 0x%x\n",
 704                             ee->magic);
 705                 return -EINVAL;
 706         }
 707
 708         return smsc75xx_write_eeprom(dev, ee->offset, ee->len, data);
 709 }
 710
 711 static void smsc75xx_ethtool_get_wol(struct net_device *net,
 712                                      struct ethtool_wolinfo *wolinfo)
 713 {
 714         struct usbnet *dev = netdev_priv(net);
 715         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 716
 717         wolinfo->supported = SUPPORTED_WAKE;
 718         wolinfo->wolopts = pdata->wolopts;
 719 }
 720
 721 static int smsc75xx_ethtool_set_wol(struct net_device *net,
 722                                     struct ethtool_wolinfo *wolinfo)
 723 {
 724         struct usbnet *dev = netdev_priv(net);
 725         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 726         int ret;
 727
 728         pdata->wolopts = wolinfo->wolopts & SUPPORTED_WAKE;
 729
 730         ret = device_set_wakeup_enable(&dev->udev->dev, pdata->wolopts);
 731         if (ret < 0)
 732                 netdev_warn(dev->net, "device_set_wakeup_enable error %d\n", ret);
 733
 734         return ret;
 735 }
 736
 737 static const struct ethtool_ops smsc75xx_ethtool_ops = {
 738         .get_link       = usbnet_get_link,
 739         .nway_reset     = usbnet_nway_reset,
 740         .get_drvinfo    = usbnet_get_drvinfo,
 741         .get_msglevel   = usbnet_get_msglevel,
 742         .set_msglevel   = usbnet_set_msglevel,
 743         .get_settings   = usbnet_get_settings,
 744         .set_settings   = usbnet_set_settings,
 745         .get_eeprom_len = smsc75xx_ethtool_get_eeprom_len,
 746         .get_eeprom     = smsc75xx_ethtool_get_eeprom,
 747         .set_eeprom     = smsc75xx_ethtool_set_eeprom,
 748         .get_wol        = smsc75xx_ethtool_get_wol,
 749         .set_wol        = smsc75xx_ethtool_set_wol,
 750 };
 751
 752 static int smsc75xx_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
 753 {
 754         struct usbnet *dev = netdev_priv(netdev);
 755
 756         if (!netif_running(netdev))
 757                 return -EINVAL;
 758
 759         return generic_mii_ioctl(&dev->mii, if_mii(rq), cmd, NULL);
 760 }
 761
 762 static void smsc75xx_init_mac_address(struct usbnet *dev)
 763 {
 764         /* try reading mac address from EEPROM */
 765         if (smsc75xx_read_eeprom(dev, EEPROM_MAC_OFFSET, ETH_ALEN,
 766                         dev->net->dev_addr) == 0) {
 767                 if (is_valid_ether_addr(dev->net->dev_addr)) {
 768                         /* eeprom values are valid so use them */
 769                         netif_dbg(dev, ifup, dev->net,
 770                                   "MAC address read from EEPROM\n");
 771                         return;
 772                 }
 773         }
 774
 775         /* no eeprom, or eeprom values are invalid. generate random MAC */
 776         eth_hw_addr_random(dev->net);
 777         netif_dbg(dev, ifup, dev->net, "MAC address set to eth_random_addr\n");
 778 }
 779
 780 static int smsc75xx_set_mac_address(struct usbnet *dev)
 781 {
 782         u32 addr_lo = dev->net->dev_addr[0] | dev->net->dev_addr[1] << 8 |
 783                 dev->net->dev_addr[2] << 16 | dev->net->dev_addr[3] << 24;
 784         u32 addr_hi = dev->net->dev_addr[4] | dev->net->dev_addr[5] << 8;
 785
 786         int ret = smsc75xx_write_reg(dev, RX_ADDRH, addr_hi);
 787         if (ret < 0) {
 788                 netdev_warn(dev->net, "Failed to write RX_ADDRH: %d\n", ret);
 789                 return ret;
 790         }
 791
 792         ret = smsc75xx_write_reg(dev, RX_ADDRL, addr_lo);
 793         if (ret < 0) {
 794                 netdev_warn(dev->net, "Failed to write RX_ADDRL: %d\n", ret);
 795                 return ret;
 796         }
 797
 798         addr_hi |= ADDR_FILTX_FB_VALID;
 799         ret = smsc75xx_write_reg(dev, ADDR_FILTX, addr_hi);
 800         if (ret < 0) {
 801                 netdev_warn(dev->net, "Failed to write ADDR_FILTX: %d\n", ret);
 802                 return ret;
 803         }
 804
 805         ret = smsc75xx_write_reg(dev, ADDR_FILTX + 4, addr_lo);
 806         if (ret < 0)
 807                 netdev_warn(dev->net, "Failed to write ADDR_FILTX+4: %d\n", ret);
 808
 809         return ret;
 810 }
 811
 812 static int smsc75xx_phy_initialize(struct usbnet *dev)
 813 {
 814         int bmcr, ret, timeout = 0;
 815
 816         /* Initialize MII structure */
 817         dev->mii.dev = dev->net;
 818         dev->mii.mdio_read = smsc75xx_mdio_read;
 819         dev->mii.mdio_write = smsc75xx_mdio_write;
 820         dev->mii.phy_id_mask = 0x1f;
 821         dev->mii.reg_num_mask = 0x1f;
 822         dev->mii.supports_gmii = 1;
 823         dev->mii.phy_id = SMSC75XX_INTERNAL_PHY_ID;
 824
 825         /* reset phy and wait for reset to complete */
 826         smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_BMCR, BMCR_RESET);
 827
 828         do {
 829                 msleep(10);
 830                 bmcr = smsc75xx_mdio_read(dev->net, dev->mii.phy_id, MII_BMCR);
 831                 if (bmcr < 0) {
 832                         netdev_warn(dev->net, "Error reading MII_BMCR\n");
 833                         return bmcr;
 834                 }
 835                 timeout++;
 836         } while ((bmcr & BMCR_RESET) && (timeout < 100));
 837
 838         if (timeout >= 100) {
 839                 netdev_warn(dev->net, "timeout on PHY Reset\n");
 840                 return -EIO;
 841         }
 842
 843         smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_ADVERTISE,
 844                 ADVERTISE_ALL | ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP |
 845                 ADVERTISE_PAUSE_ASYM);
 846         smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_CTRL1000,
 847                 ADVERTISE_1000FULL);
 848
 849         /* read and write to clear phy interrupt status */
 850         ret = smsc75xx_mdio_read(dev->net, dev->mii.phy_id, PHY_INT_SRC);
 851         if (ret < 0) {
 852                 netdev_warn(dev->net, "Error reading PHY_INT_SRC\n");
 853                 return ret;
 854         }
 855
 856         smsc75xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_SRC, 0xffff);
 857
 858         smsc75xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_MASK,
 859                 PHY_INT_MASK_DEFAULT);
 860         mii_nway_restart(&dev->mii);
 861
 862         netif_dbg(dev, ifup, dev->net, "phy initialised successfully\n");
 863         return 0;
 864 }
 865
 866 static int smsc75xx_set_rx_max_frame_length(struct usbnet *dev, int size)
 867 {
 868         int ret = 0;
 869         u32 buf;
 870         bool rxenabled;
 871
 872         ret = smsc75xx_read_reg(dev, MAC_RX, &buf);
 873         if (ret < 0) {
 874                 netdev_warn(dev->net, "Failed to read MAC_RX: %d\n", ret);
 875                 return ret;
 876         }
 877
 878         rxenabled = ((buf & MAC_RX_RXEN) != 0);
 879
 880         if (rxenabled) {
 881                 buf &= ~MAC_RX_RXEN;
 882                 ret = smsc75xx_write_reg(dev, MAC_RX, buf);
 883                 if (ret < 0) {
 884                         netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
 885                         return ret;
 886                 }
 887         }
 888
 889         /* add 4 to size for FCS */
 890         buf &= ~MAC_RX_MAX_SIZE;
 891         buf |= (((size + 4) << MAC_RX_MAX_SIZE_SHIFT) & MAC_RX_MAX_SIZE);
 892
 893         ret = smsc75xx_write_reg(dev, MAC_RX, buf);
 894         if (ret < 0) {
 895                 netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
 896                 return ret;
 897         }
 898
 899         if (rxenabled) {
 900                 buf |= MAC_RX_RXEN;
 901                 ret = smsc75xx_write_reg(dev, MAC_RX, buf);
 902                 if (ret < 0) {
 903                         netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
 904                         return ret;
 905                 }
 906         }
 907
 908         return 0;
 909 }
 910
 911 static int smsc75xx_change_mtu(struct net_device *netdev, int new_mtu)
 912 {
 913         struct usbnet *dev = netdev_priv(netdev);
 914         int ret;
 915
 916         if (new_mtu > MAX_SINGLE_PACKET_SIZE)
 917                 return -EINVAL;
 918
 919         ret = smsc75xx_set_rx_max_frame_length(dev, new_mtu + ETH_HLEN);
 920         if (ret < 0) {
 921                 netdev_warn(dev->net, "Failed to set mac rx frame length\n");
 922                 return ret;
 923         }
 924
 925         return usbnet_change_mtu(netdev, new_mtu);
 926 }
 927
 928 /* Enable or disable Rx checksum offload engine */
 929 static int smsc75xx_set_features(struct net_device *netdev,
 930         netdev_features_t features)
 931 {
 932         struct usbnet *dev = netdev_priv(netdev);
 933         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 934         unsigned long flags;
 935         int ret;
 936
 937         spin_lock_irqsave(&pdata->rfe_ctl_lock, flags);
 938
 939         if (features & NETIF_F_RXCSUM)
 940                 pdata->rfe_ctl |= RFE_CTL_TCPUDP_CKM | RFE_CTL_IP_CKM;
 941         else
 942                 pdata->rfe_ctl &= ~(RFE_CTL_TCPUDP_CKM | RFE_CTL_IP_CKM);
 943
 944         spin_unlock_irqrestore(&pdata->rfe_ctl_lock, flags);
 945         /* it's racing here! */
 946
 947         ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
 948         if (ret < 0) {
 949                 netdev_warn(dev->net, "Error writing RFE_CTL\n");
 950                 return ret;
 951         }
 952         return 0;
 953 }
 954
 955 static int smsc75xx_wait_ready(struct usbnet *dev, int in_pm)
 956 {
 957         int timeout = 0;
 958
 959         do {
 960                 u32 buf;
 961                 int ret;
 962
 963                 ret = __smsc75xx_read_reg(dev, PMT_CTL, &buf, in_pm);
 964
 965                 if (ret < 0) {
 966                         netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret);
 967                         return ret;
 968                 }
 969
 970                 if (buf & PMT_CTL_DEV_RDY)
 971                         return 0;
 972
 973                 msleep(10);
 974                 timeout++;
 975         } while (timeout < 100);
 976
 977         netdev_warn(dev->net, "timeout waiting for device ready\n");
 978         return -EIO;
 979 }
 980
 981 static int smsc75xx_reset(struct usbnet *dev)
 982 {
 983         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 984         u32 buf;
 985         int ret = 0, timeout;
 986
 987         netif_dbg(dev, ifup, dev->net, "entering smsc75xx_reset\n");
 988
 989         ret = smsc75xx_wait_ready(dev, 0);
 990         if (ret < 0) {
 991                 netdev_warn(dev->net, "device not ready in smsc75xx_reset\n");
 992                 return ret;
 993         }
 994
 995         ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
 996         if (ret < 0) {
 997                 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
 998                 return ret;
 999         }
1000
1001         buf |= HW_CFG_LRST;
1002
1003         ret = smsc75xx_write_reg(dev, HW_CFG, buf);
1004         if (ret < 0) {
1005                 netdev_warn(dev->net, "Failed to write HW_CFG: %d\n", ret);
1006                 return ret;
1007         }
1008
1009         timeout = 0;
1010         do {
1011                 msleep(10);
1012                 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1013                 if (ret < 0) {
1014                         netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1015                         return ret;
1016                 }
1017                 timeout++;
1018         } while ((buf & HW_CFG_LRST) && (timeout < 100));
1019
1020         if (timeout >= 100) {
1021                 netdev_warn(dev->net, "timeout on completion of Lite Reset\n");
1022                 return -EIO;
1023         }
1024
1025         netif_dbg(dev, ifup, dev->net, "Lite reset complete, resetting PHY\n");
1026
1027         ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
1028         if (ret < 0) {
1029                 netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret);
1030                 return ret;
1031         }
1032
1033         buf |= PMT_CTL_PHY_RST;
1034
1035         ret = smsc75xx_write_reg(dev, PMT_CTL, buf);
1036         if (ret < 0) {
1037                 netdev_warn(dev->net, "Failed to write PMT_CTL: %d\n", ret);
1038                 return ret;
1039         }
1040
1041         timeout = 0;
1042         do {
1043                 msleep(10);
1044                 ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
1045                 if (ret < 0) {
1046                         netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret);
1047                         return ret;
1048                 }
1049                 timeout++;
1050         } while ((buf & PMT_CTL_PHY_RST) && (timeout < 100));
1051
1052         if (timeout >= 100) {
1053                 netdev_warn(dev->net, "timeout waiting for PHY Reset\n");
1054                 return -EIO;
1055         }
1056
1057         netif_dbg(dev, ifup, dev->net, "PHY reset complete\n");
1058
1059         ret = smsc75xx_set_mac_address(dev);
1060         if (ret < 0) {
1061                 netdev_warn(dev->net, "Failed to set mac address\n");
1062                 return ret;
1063         }
1064
1065         netif_dbg(dev, ifup, dev->net, "MAC Address: %pM\n",
1066                   dev->net->dev_addr);
1067
1068         ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1069         if (ret < 0) {
1070                 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1071                 return ret;
1072         }
1073
1074         netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG : 0x%08x\n",
1075                   buf);
1076
1077         buf |= HW_CFG_BIR;
1078
1079         ret = smsc75xx_write_reg(dev, HW_CFG, buf);
1080         if (ret < 0) {
1081                 netdev_warn(dev->net,  "Failed to write HW_CFG: %d\n", ret);
1082                 return ret;
1083         }
1084
1085         ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1086         if (ret < 0) {
1087                 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1088                 return ret;
1089         }
1090
1091         netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG after writing HW_CFG_BIR: 0x%08x\n",
1092                   buf);
1093
1094         if (!turbo_mode) {
1095                 buf = 0;
1096                 dev->rx_urb_size = MAX_SINGLE_PACKET_SIZE;
1097         } else if (dev->udev->speed == USB_SPEED_HIGH) {
1098                 buf = DEFAULT_HS_BURST_CAP_SIZE / HS_USB_PKT_SIZE;
1099                 dev->rx_urb_size = DEFAULT_HS_BURST_CAP_SIZE;
1100         } else {
1101                 buf = DEFAULT_FS_BURST_CAP_SIZE / FS_USB_PKT_SIZE;
1102                 dev->rx_urb_size = DEFAULT_FS_BURST_CAP_SIZE;
1103         }
1104
1105         netif_dbg(dev, ifup, dev->net, "rx_urb_size=%ld\n",
1106                   (ulong)dev->rx_urb_size);
1107
1108         ret = smsc75xx_write_reg(dev, BURST_CAP, buf);
1109         if (ret < 0) {
1110                 netdev_warn(dev->net, "Failed to write BURST_CAP: %d\n", ret);
1111                 return ret;
1112         }
1113
1114         ret = smsc75xx_read_reg(dev, BURST_CAP, &buf);
1115         if (ret < 0) {
1116                 netdev_warn(dev->net, "Failed to read BURST_CAP: %d\n", ret);
1117                 return ret;
1118         }
1119
1120         netif_dbg(dev, ifup, dev->net,
1121                   "Read Value from BURST_CAP after writing: 0x%08x\n", buf);
1122
1123         ret = smsc75xx_write_reg(dev, BULK_IN_DLY, DEFAULT_BULK_IN_DELAY);
1124         if (ret < 0) {
1125                 netdev_warn(dev->net, "Failed to write BULK_IN_DLY: %d\n", ret);
1126                 return ret;
1127         }
1128
1129         ret = smsc75xx_read_reg(dev, BULK_IN_DLY, &buf);
1130         if (ret < 0) {
1131                 netdev_warn(dev->net, "Failed to read BULK_IN_DLY: %d\n", ret);
1132                 return ret;
1133         }
1134
1135         netif_dbg(dev, ifup, dev->net,
1136                   "Read Value from BULK_IN_DLY after writing: 0x%08x\n", buf);
1137
1138         if (turbo_mode) {
1139                 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1140                 if (ret < 0) {
1141                         netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1142                         return ret;
1143                 }
1144
1145                 netif_dbg(dev, ifup, dev->net, "HW_CFG: 0x%08x\n", buf);
1146
1147                 buf |= (HW_CFG_MEF | HW_CFG_BCE);
1148
1149                 ret = smsc75xx_write_reg(dev, HW_CFG, buf);
1150                 if (ret < 0) {
1151                         netdev_warn(dev->net, "Failed to write HW_CFG: %d\n", ret);
1152                         return ret;
1153                 }
1154
1155                 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1156                 if (ret < 0) {
1157                         netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1158                         return ret;
1159                 }
1160
1161                 netif_dbg(dev, ifup, dev->net, "HW_CFG: 0x%08x\n", buf);
1162         }
1163
1164         /* set FIFO sizes */
1165         buf = (MAX_RX_FIFO_SIZE - 512) / 512;
1166         ret = smsc75xx_write_reg(dev, FCT_RX_FIFO_END, buf);
1167         if (ret < 0) {
1168                 netdev_warn(dev->net, "Failed to write FCT_RX_FIFO_END: %d\n", ret);
1169                 return ret;
1170         }
1171
1172         netif_dbg(dev, ifup, dev->net, "FCT_RX_FIFO_END set to 0x%08x\n", buf);
1173
1174         buf = (MAX_TX_FIFO_SIZE - 512) / 512;
1175         ret = smsc75xx_write_reg(dev, FCT_TX_FIFO_END, buf);
1176         if (ret < 0) {
1177                 netdev_warn(dev->net, "Failed to write FCT_TX_FIFO_END: %d\n", ret);
1178                 return ret;
1179         }
1180
1181         netif_dbg(dev, ifup, dev->net, "FCT_TX_FIFO_END set to 0x%08x\n", buf);
1182
1183         ret = smsc75xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL);
1184         if (ret < 0) {
1185                 netdev_warn(dev->net, "Failed to write INT_STS: %d\n", ret);
1186                 return ret;
1187         }
1188
1189         ret = smsc75xx_read_reg(dev, ID_REV, &buf);
1190         if (ret < 0) {
1191                 netdev_warn(dev->net, "Failed to read ID_REV: %d\n", ret);
1192                 return ret;
1193         }
1194
1195         netif_dbg(dev, ifup, dev->net, "ID_REV = 0x%08x\n", buf);
1196
1197         ret = smsc75xx_read_reg(dev, E2P_CMD, &buf);
1198         if (ret < 0) {
1199                 netdev_warn(dev->net, "Failed to read E2P_CMD: %d\n", ret);
1200                 return ret;
1201         }
1202
1203         /* only set default GPIO/LED settings if no EEPROM is detected */
1204         if (!(buf & E2P_CMD_LOADED)) {
1205                 ret = smsc75xx_read_reg(dev, LED_GPIO_CFG, &buf);
1206                 if (ret < 0) {
1207                         netdev_warn(dev->net, "Failed to read LED_GPIO_CFG: %d\n", ret);
1208                         return ret;
1209                 }
1210
1211                 buf &= ~(LED_GPIO_CFG_LED2_FUN_SEL | LED_GPIO_CFG_LED10_FUN_SEL);
1212                 buf |= LED_GPIO_CFG_LEDGPIO_EN | LED_GPIO_CFG_LED2_FUN_SEL;
1213
1214                 ret = smsc75xx_write_reg(dev, LED_GPIO_CFG, buf);
1215                 if (ret < 0) {
1216                         netdev_warn(dev->net, "Failed to write LED_GPIO_CFG: %d\n", ret);
1217                         return ret;
1218                 }
1219         }
1220
1221         ret = smsc75xx_write_reg(dev, FLOW, 0);
1222         if (ret < 0) {
1223                 netdev_warn(dev->net, "Failed to write FLOW: %d\n", ret);
1224                 return ret;
1225         }
1226
1227         ret = smsc75xx_write_reg(dev, FCT_FLOW, 0);
1228         if (ret < 0) {
1229                 netdev_warn(dev->net, "Failed to write FCT_FLOW: %d\n", ret);
1230                 return ret;
1231         }
1232
1233         /* Don't need rfe_ctl_lock during initialisation */
1234         ret = smsc75xx_read_reg(dev, RFE_CTL, &pdata->rfe_ctl);
1235         if (ret < 0) {
1236                 netdev_warn(dev->net, "Failed to read RFE_CTL: %d\n", ret);
1237                 return ret;
1238         }
1239
1240         pdata->rfe_ctl |= RFE_CTL_AB | RFE_CTL_DPF;
1241
1242         ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
1243         if (ret < 0) {
1244                 netdev_warn(dev->net, "Failed to write RFE_CTL: %d\n", ret);
1245                 return ret;
1246         }
1247
1248         ret = smsc75xx_read_reg(dev, RFE_CTL, &pdata->rfe_ctl);
1249         if (ret < 0) {
1250                 netdev_warn(dev->net, "Failed to read RFE_CTL: %d\n", ret);
1251                 return ret;
1252         }
1253
1254         netif_dbg(dev, ifup, dev->net, "RFE_CTL set to 0x%08x\n",
1255                   pdata->rfe_ctl);
1256
1257         /* Enable or disable checksum offload engines */
1258         smsc75xx_set_features(dev->net, dev->net->features);
1259
1260         smsc75xx_set_multicast(dev->net);
1261
1262         ret = smsc75xx_phy_initialize(dev);
1263         if (ret < 0) {
1264                 netdev_warn(dev->net, "Failed to initialize PHY: %d\n", ret);
1265                 return ret;
1266         }
1267
1268         ret = smsc75xx_read_reg(dev, INT_EP_CTL, &buf);
1269         if (ret < 0) {
1270                 netdev_warn(dev->net, "Failed to read INT_EP_CTL: %d\n", ret);
1271                 return ret;
1272         }
1273
1274         /* enable PHY interrupts */
1275         buf |= INT_ENP_PHY_INT;
1276
1277         ret = smsc75xx_write_reg(dev, INT_EP_CTL, buf);
1278         if (ret < 0) {
1279                 netdev_warn(dev->net, "Failed to write INT_EP_CTL: %d\n", ret);
1280                 return ret;
1281         }
1282
1283         /* allow mac to detect speed and duplex from phy */
1284         ret = smsc75xx_read_reg(dev, MAC_CR, &buf);
1285         if (ret < 0) {
1286                 netdev_warn(dev->net, "Failed to read MAC_CR: %d\n", ret);
1287                 return ret;
1288         }
1289
1290         buf |= (MAC_CR_ADD | MAC_CR_ASD);
1291         ret = smsc75xx_write_reg(dev, MAC_CR, buf);
1292         if (ret < 0) {
1293                 netdev_warn(dev->net, "Failed to write MAC_CR: %d\n", ret);
1294                 return ret;
1295         }
1296
1297         ret = smsc75xx_read_reg(dev, MAC_TX, &buf);
1298         if (ret < 0) {
1299                 netdev_warn(dev->net, "Failed to read MAC_TX: %d\n", ret);
1300                 return ret;
1301         }
1302
1303         buf |= MAC_TX_TXEN;
1304
1305         ret = smsc75xx_write_reg(dev, MAC_TX, buf);
1306         if (ret < 0) {
1307                 netdev_warn(dev->net, "Failed to write MAC_TX: %d\n", ret);
1308                 return ret;
1309         }
1310
1311         netif_dbg(dev, ifup, dev->net, "MAC_TX set to 0x%08x\n", buf);
1312
1313         ret = smsc75xx_read_reg(dev, FCT_TX_CTL, &buf);
1314         if (ret < 0) {
1315                 netdev_warn(dev->net, "Failed to read FCT_TX_CTL: %d\n", ret);
1316                 return ret;
1317         }
1318
1319         buf |= FCT_TX_CTL_EN;
1320
1321         ret = smsc75xx_write_reg(dev, FCT_TX_CTL, buf);
1322         if (ret < 0) {
1323                 netdev_warn(dev->net, "Failed to write FCT_TX_CTL: %d\n", ret);
1324                 return ret;
1325         }
1326
1327         netif_dbg(dev, ifup, dev->net, "FCT_TX_CTL set to 0x%08x\n", buf);
1328
1329         ret = smsc75xx_set_rx_max_frame_length(dev, dev->net->mtu + ETH_HLEN);
1330         if (ret < 0) {
1331                 netdev_warn(dev->net, "Failed to set max rx frame length\n");
1332                 return ret;
1333         }
1334
1335         ret = smsc75xx_read_reg(dev, MAC_RX, &buf);
1336         if (ret < 0) {
1337                 netdev_warn(dev->net, "Failed to read MAC_RX: %d\n", ret);
1338                 return ret;
1339         }
1340
1341         buf |= MAC_RX_RXEN;
1342
1343         ret = smsc75xx_write_reg(dev, MAC_RX, buf);
1344         if (ret < 0) {
1345                 netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
1346                 return ret;
1347         }
1348
1349         netif_dbg(dev, ifup, dev->net, "MAC_RX set to 0x%08x\n", buf);
1350
1351         ret = smsc75xx_read_reg(dev, FCT_RX_CTL, &buf);
1352         if (ret < 0) {
1353                 netdev_warn(dev->net, "Failed to read FCT_RX_CTL: %d\n", ret);
1354                 return ret;
1355         }
1356
1357         buf |= FCT_RX_CTL_EN;
1358
1359         ret = smsc75xx_write_reg(dev, FCT_RX_CTL, buf);
1360         if (ret < 0) {
1361                 netdev_warn(dev->net, "Failed to write FCT_RX_CTL: %d\n", ret);
1362                 return ret;
1363         }
1364
1365         netif_dbg(dev, ifup, dev->net, "FCT_RX_CTL set to 0x%08x\n", buf);
1366
1367         netif_dbg(dev, ifup, dev->net, "smsc75xx_reset, return 0\n");
1368         return 0;
1369 }
1370
1371 static const struct net_device_ops smsc75xx_netdev_ops = {
1372         .ndo_open               = usbnet_open,
1373         .ndo_stop               = usbnet_stop,
1374         .ndo_start_xmit         = usbnet_start_xmit,
1375         .ndo_tx_timeout         = usbnet_tx_timeout,
1376         .ndo_change_mtu         = smsc75xx_change_mtu,
1377         .ndo_set_mac_address    = eth_mac_addr,
1378         .ndo_validate_addr      = eth_validate_addr,
1379         .ndo_do_ioctl           = smsc75xx_ioctl,
1380         .ndo_set_rx_mode        = smsc75xx_set_multicast,
1381         .ndo_set_features       = smsc75xx_set_features,
1382 };
1383
1384 static int smsc75xx_bind(struct usbnet *dev, struct usb_interface *intf)
1385 {
1386         struct smsc75xx_priv *pdata = NULL;
1387         int ret;
1388
1389         printk(KERN_INFO SMSC_CHIPNAME " v" SMSC_DRIVER_VERSION "\n");
1390
1391         ret = usbnet_get_endpoints(dev, intf);
1392         if (ret < 0) {
1393                 netdev_warn(dev->net, "usbnet_get_endpoints failed: %d\n", ret);
1394                 return ret;
1395         }
1396
1397         dev->data[0] = (unsigned long)kzalloc(sizeof(struct smsc75xx_priv),
1398                                               GFP_KERNEL);
1399
1400         pdata = (struct smsc75xx_priv *)(dev->data[0]);
1401         if (!pdata)
1402                 return -ENOMEM;
1403
1404         pdata->dev = dev;
1405
1406         spin_lock_init(&pdata->rfe_ctl_lock);
1407         mutex_init(&pdata->dataport_mutex);
1408
1409         INIT_WORK(&pdata->set_multicast, smsc75xx_deferred_multicast_write);
1410
1411         if (DEFAULT_TX_CSUM_ENABLE)
1412                 dev->net->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
1413
1414         if (DEFAULT_RX_CSUM_ENABLE)
1415                 dev->net->features |= NETIF_F_RXCSUM;
1416
1417         dev->net->hw_features = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
1418                                 NETIF_F_RXCSUM;
1419
1420         ret = smsc75xx_wait_ready(dev, 0);
1421         if (ret < 0) {
1422                 netdev_warn(dev->net, "device not ready in smsc75xx_bind\n");
1423                 return ret;
1424         }
1425
1426         smsc75xx_init_mac_address(dev);
1427
1428         /* Init all registers */
1429         ret = smsc75xx_reset(dev);
1430         if (ret < 0) {
1431                 netdev_warn(dev->net, "smsc75xx_reset error %d\n", ret);
1432                 return ret;
1433         }
1434
1435         dev->net->netdev_ops = &smsc75xx_netdev_ops;
1436         dev->net->ethtool_ops = &smsc75xx_ethtool_ops;
1437         dev->net->flags |= IFF_MULTICAST;
1438         dev->net->hard_header_len += SMSC75XX_TX_OVERHEAD;
1439         dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len;
1440         return 0;
1441 }
1442
1443 static void smsc75xx_unbind(struct usbnet *dev, struct usb_interface *intf)
1444 {
1445         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1446         if (pdata) {
1447                 netif_dbg(dev, ifdown, dev->net, "free pdata\n");
1448                 kfree(pdata);
1449                 pdata = NULL;
1450                 dev->data[0] = 0;
1451         }
1452 }
1453
1454 static u16 smsc_crc(const u8 *buffer, size_t len)
1455 {
1456         return bitrev16(crc16(0xFFFF, buffer, len));
1457 }
1458
1459 static int smsc75xx_write_wuff(struct usbnet *dev, int filter, u32 wuf_cfg,
1460                                u32 wuf_mask1)
1461 {
1462         int cfg_base = WUF_CFGX + filter * 4;
1463         int mask_base = WUF_MASKX + filter * 16;
1464         int ret;
1465
1466         ret = smsc75xx_write_reg(dev, cfg_base, wuf_cfg);
1467         if (ret < 0) {
1468                 netdev_warn(dev->net, "Error writing WUF_CFGX\n");
1469                 return ret;
1470         }
1471
1472         ret = smsc75xx_write_reg(dev, mask_base, wuf_mask1);
1473         if (ret < 0) {
1474                 netdev_warn(dev->net, "Error writing WUF_MASKX\n");
1475                 return ret;
1476         }
1477
1478         ret = smsc75xx_write_reg(dev, mask_base + 4, 0);
1479         if (ret < 0) {
1480                 netdev_warn(dev->net, "Error writing WUF_MASKX\n");
1481                 return ret;
1482         }
1483
1484         ret = smsc75xx_write_reg(dev, mask_base + 8, 0);
1485         if (ret < 0) {
1486                 netdev_warn(dev->net, "Error writing WUF_MASKX\n");
1487                 return ret;
1488         }
1489
1490         ret = smsc75xx_write_reg(dev, mask_base + 12, 0);
1491         if (ret < 0) {
1492                 netdev_warn(dev->net, "Error writing WUF_MASKX\n");
1493                 return ret;
1494         }
1495
1496         return 0;
1497 }
1498
1499 static int smsc75xx_enter_suspend0(struct usbnet *dev)
1500 {
1501         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1502         u32 val;
1503         int ret;
1504
1505         ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1506         if (ret < 0) {
1507                 netdev_warn(dev->net, "Error reading PMT_CTL\n");
1508                 return ret;
1509         }
1510
1511         val &= (~(PMT_CTL_SUS_MODE | PMT_CTL_PHY_RST));
1512         val |= PMT_CTL_SUS_MODE_0 | PMT_CTL_WOL_EN | PMT_CTL_WUPS;
1513
1514         ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1515         if (ret < 0) {
1516                 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1517                 return ret;
1518         }
1519
1520         pdata->suspend_flags |= SUSPEND_SUSPEND0;
1521
1522         return 0;
1523 }
1524
1525 static int smsc75xx_enter_suspend1(struct usbnet *dev)
1526 {
1527         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1528         u32 val;
1529         int ret;
1530
1531         ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1532         if (ret < 0) {
1533                 netdev_warn(dev->net, "Error reading PMT_CTL\n");
1534                 return ret;
1535         }
1536
1537         val &= ~(PMT_CTL_SUS_MODE | PMT_CTL_WUPS | PMT_CTL_PHY_RST);
1538         val |= PMT_CTL_SUS_MODE_1;
1539
1540         ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1541         if (ret < 0) {
1542                 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1543                 return ret;
1544         }
1545
1546         /* clear wol status, enable energy detection */
1547         val &= ~PMT_CTL_WUPS;
1548         val |= (PMT_CTL_WUPS_ED | PMT_CTL_ED_EN);
1549
1550         ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1551         if (ret < 0) {
1552                 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1553                 return ret;
1554         }
1555
1556         pdata->suspend_flags |= SUSPEND_SUSPEND1;
1557
1558         return 0;
1559 }
1560
1561 static int smsc75xx_enter_suspend2(struct usbnet *dev)
1562 {
1563         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1564         u32 val;
1565         int ret;
1566
1567         ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1568         if (ret < 0) {
1569                 netdev_warn(dev->net, "Error reading PMT_CTL\n");
1570                 return ret;
1571         }
1572
1573         val &= ~(PMT_CTL_SUS_MODE | PMT_CTL_WUPS | PMT_CTL_PHY_RST);
1574         val |= PMT_CTL_SUS_MODE_2;
1575
1576         ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1577         if (ret < 0) {
1578                 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1579                 return ret;
1580         }
1581
1582         pdata->suspend_flags |= SUSPEND_SUSPEND2;
1583
1584         return 0;
1585 }
1586
1587 static int smsc75xx_enter_suspend3(struct usbnet *dev)
1588 {
1589         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1590         u32 val;
1591         int ret;
1592
1593         ret = smsc75xx_read_reg_nopm(dev, FCT_RX_CTL, &val);
1594         if (ret < 0) {
1595                 netdev_warn(dev->net, "Error reading FCT_RX_CTL\n");
1596                 return ret;
1597         }
1598
1599         if (val & FCT_RX_CTL_RXUSED) {
1600                 netdev_dbg(dev->net, "rx fifo not empty in autosuspend\n");
1601                 return -EBUSY;
1602         }
1603
1604         ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1605         if (ret < 0) {
1606                 netdev_warn(dev->net, "Error reading PMT_CTL\n");
1607                 return ret;
1608         }
1609
1610         val &= ~(PMT_CTL_SUS_MODE | PMT_CTL_WUPS | PMT_CTL_PHY_RST);
1611         val |= PMT_CTL_SUS_MODE_3 | PMT_CTL_RES_CLR_WKP_EN;
1612
1613         ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1614         if (ret < 0) {
1615                 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1616                 return ret;
1617         }
1618
1619         /* clear wol status */
1620         val &= ~PMT_CTL_WUPS;
1621         val |= PMT_CTL_WUPS_WOL;
1622
1623         ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1624         if (ret < 0) {
1625                 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1626                 return ret;
1627         }
1628
1629         pdata->suspend_flags |= SUSPEND_SUSPEND3;
1630
1631         return 0;
1632 }
1633
1634 static int smsc75xx_enable_phy_wakeup_interrupts(struct usbnet *dev, u16 mask)
1635 {
1636         struct mii_if_info *mii = &dev->mii;
1637         int ret;
1638
1639         netdev_dbg(dev->net, "enabling PHY wakeup interrupts\n");
1640
1641         /* read to clear */
1642         ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_SRC);
1643         if (ret < 0) {
1644                 netdev_warn(dev->net, "Error reading PHY_INT_SRC\n");
1645                 return ret;
1646         }
1647
1648         /* enable interrupt source */
1649         ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_MASK);
1650         if (ret < 0) {
1651                 netdev_warn(dev->net, "Error reading PHY_INT_MASK\n");
1652                 return ret;
1653         }
1654
1655         ret |= mask;
1656
1657         smsc75xx_mdio_write_nopm(dev->net, mii->phy_id, PHY_INT_MASK, ret);
1658
1659         return 0;
1660 }
1661
1662 static int smsc75xx_link_ok_nopm(struct usbnet *dev)
1663 {
1664         struct mii_if_info *mii = &dev->mii;
1665         int ret;
1666
1667         /* first, a dummy read, needed to latch some MII phys */
1668         ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR);
1669         if (ret < 0) {
1670                 netdev_warn(dev->net, "Error reading MII_BMSR\n");
1671                 return ret;
1672         }
1673
1674         ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR);
1675         if (ret < 0) {
1676                 netdev_warn(dev->net, "Error reading MII_BMSR\n");
1677                 return ret;
1678         }
1679
1680         return !!(ret & BMSR_LSTATUS);
1681 }
1682
1683 static int smsc75xx_autosuspend(struct usbnet *dev, u32 link_up)
1684 {
1685         int ret;
1686
1687         if (!netif_running(dev->net)) {
1688                 /* interface is ifconfig down so fully power down hw */
1689                 netdev_dbg(dev->net, "autosuspend entering SUSPEND2\n");
1690                 return smsc75xx_enter_suspend2(dev);
1691         }
1692
1693         if (!link_up) {
1694                 /* link is down so enter EDPD mode */
1695                 netdev_dbg(dev->net, "autosuspend entering SUSPEND1\n");
1696
1697                 /* enable PHY wakeup events for if cable is attached */
1698                 ret = smsc75xx_enable_phy_wakeup_interrupts(dev,
1699                         PHY_INT_MASK_ANEG_COMP);
1700                 if (ret < 0) {
1701                         netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1702                         return ret;
1703                 }
1704
1705                 netdev_info(dev->net, "entering SUSPEND1 mode\n");
1706                 return smsc75xx_enter_suspend1(dev);
1707         }
1708
1709         /* enable PHY wakeup events so we remote wakeup if cable is pulled */
1710         ret = smsc75xx_enable_phy_wakeup_interrupts(dev,
1711                 PHY_INT_MASK_LINK_DOWN);
1712         if (ret < 0) {
1713                 netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1714                 return ret;
1715         }
1716
1717         netdev_dbg(dev->net, "autosuspend entering SUSPEND3\n");
1718         return smsc75xx_enter_suspend3(dev);
1719 }
1720
1721 static int smsc75xx_suspend(struct usb_interface *intf, pm_message_t message)
1722 {
1723         struct usbnet *dev = usb_get_intfdata(intf);
1724         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1725         u32 val, link_up;
1726         int ret;
1727
1728         ret = usbnet_suspend(intf, message);
1729         if (ret < 0) {
1730                 netdev_warn(dev->net, "usbnet_suspend error\n");
1731                 return ret;
1732         }
1733
1734         if (pdata->suspend_flags) {
1735                 netdev_warn(dev->net, "error during last resume\n");
1736                 pdata->suspend_flags = 0;
1737         }
1738
1739         /* determine if link is up using only _nopm functions */
1740         link_up = smsc75xx_link_ok_nopm(dev);
1741
1742         if (message.event == PM_EVENT_AUTO_SUSPEND) {
1743                 ret = smsc75xx_autosuspend(dev, link_up);
1744                 goto done;
1745         }
1746
1747         /* if we get this far we're not autosuspending */
1748         /* if no wol options set, or if link is down and we're not waking on
1749          * PHY activity, enter lowest power SUSPEND2 mode
1750          */
1751         if (!(pdata->wolopts & SUPPORTED_WAKE) ||
1752                 !(link_up || (pdata->wolopts & WAKE_PHY))) {
1753                 netdev_info(dev->net, "entering SUSPEND2 mode\n");
1754
1755                 /* disable energy detect (link up) & wake up events */
1756                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1757                 if (ret < 0) {
1758                         netdev_warn(dev->net, "Error reading WUCSR\n");
1759                         goto done;
1760                 }
1761
1762                 val &= ~(WUCSR_MPEN | WUCSR_WUEN);
1763
1764                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1765                 if (ret < 0) {
1766                         netdev_warn(dev->net, "Error writing WUCSR\n");
1767                         goto done;
1768                 }
1769
1770                 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1771                 if (ret < 0) {
1772                         netdev_warn(dev->net, "Error reading PMT_CTL\n");
1773                         goto done;
1774                 }
1775
1776                 val &= ~(PMT_CTL_ED_EN | PMT_CTL_WOL_EN);
1777
1778                 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1779                 if (ret < 0) {
1780                         netdev_warn(dev->net, "Error writing PMT_CTL\n");
1781                         goto done;
1782                 }
1783
1784                 ret = smsc75xx_enter_suspend2(dev);
1785                 goto done;
1786         }
1787
1788         if (pdata->wolopts & WAKE_PHY) {
1789                 ret = smsc75xx_enable_phy_wakeup_interrupts(dev,
1790                         (PHY_INT_MASK_ANEG_COMP | PHY_INT_MASK_LINK_DOWN));
1791                 if (ret < 0) {
1792                         netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1793                         goto done;
1794                 }
1795
1796                 /* if link is down then configure EDPD and enter SUSPEND1,
1797                  * otherwise enter SUSPEND0 below
1798                  */
1799                 if (!link_up) {
1800                         struct mii_if_info *mii = &dev->mii;
1801                         netdev_info(dev->net, "entering SUSPEND1 mode\n");
1802
1803                         /* enable energy detect power-down mode */
1804                         ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id,
1805                                 PHY_MODE_CTRL_STS);
1806                         if (ret < 0) {
1807                                 netdev_warn(dev->net, "Error reading PHY_MODE_CTRL_STS\n");
1808                                 goto done;
1809                         }
1810
1811                         ret |= MODE_CTRL_STS_EDPWRDOWN;
1812
1813                         smsc75xx_mdio_write_nopm(dev->net, mii->phy_id,
1814                                 PHY_MODE_CTRL_STS, ret);
1815
1816                         /* enter SUSPEND1 mode */
1817                         ret = smsc75xx_enter_suspend1(dev);
1818                         goto done;
1819                 }
1820         }
1821
1822         if (pdata->wolopts & (WAKE_MCAST | WAKE_ARP)) {
1823                 int i, filter = 0;
1824
1825                 /* disable all filters */
1826                 for (i = 0; i < WUF_NUM; i++) {
1827                         ret = smsc75xx_write_reg_nopm(dev, WUF_CFGX + i * 4, 0);
1828                         if (ret < 0) {
1829                                 netdev_warn(dev->net, "Error writing WUF_CFGX\n");
1830                                 goto done;
1831                         }
1832                 }
1833
1834                 if (pdata->wolopts & WAKE_MCAST) {
1835                         const u8 mcast[] = {0x01, 0x00, 0x5E};
1836                         netdev_info(dev->net, "enabling multicast detection\n");
1837
1838                         val = WUF_CFGX_EN | WUF_CFGX_ATYPE_MULTICAST
1839                                 | smsc_crc(mcast, 3);
1840                         ret = smsc75xx_write_wuff(dev, filter++, val, 0x0007);
1841                         if (ret < 0) {
1842                                 netdev_warn(dev->net, "Error writing wakeup filter\n");
1843                                 goto done;
1844                         }
1845                 }
1846
1847                 if (pdata->wolopts & WAKE_ARP) {
1848                         const u8 arp[] = {0x08, 0x06};
1849                         netdev_info(dev->net, "enabling ARP detection\n");
1850
1851                         val = WUF_CFGX_EN | WUF_CFGX_ATYPE_ALL | (0x0C << 16)
1852                                 | smsc_crc(arp, 2);
1853                         ret = smsc75xx_write_wuff(dev, filter++, val, 0x0003);
1854                         if (ret < 0) {
1855                                 netdev_warn(dev->net, "Error writing wakeup filter\n");
1856                                 goto done;
1857                         }
1858                 }
1859
1860                 /* clear any pending pattern match packet status */
1861                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1862                 if (ret < 0) {
1863                         netdev_warn(dev->net, "Error reading WUCSR\n");
1864                         goto done;
1865                 }
1866
1867                 val |= WUCSR_WUFR;
1868
1869                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1870                 if (ret < 0) {
1871                         netdev_warn(dev->net, "Error writing WUCSR\n");
1872                         goto done;
1873                 }
1874
1875                 netdev_info(dev->net, "enabling packet match detection\n");
1876                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1877                 if (ret < 0) {
1878                         netdev_warn(dev->net, "Error reading WUCSR\n");
1879                         goto done;
1880                 }
1881
1882                 val |= WUCSR_WUEN;
1883
1884                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1885                 if (ret < 0) {
1886                         netdev_warn(dev->net, "Error writing WUCSR\n");
1887                         goto done;
1888                 }
1889         } else {
1890                 netdev_info(dev->net, "disabling packet match detection\n");
1891                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1892                 if (ret < 0) {
1893                         netdev_warn(dev->net, "Error reading WUCSR\n");
1894                         goto done;
1895                 }
1896
1897                 val &= ~WUCSR_WUEN;
1898
1899                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1900                 if (ret < 0) {
1901                         netdev_warn(dev->net, "Error writing WUCSR\n");
1902                         goto done;
1903                 }
1904         }
1905
1906         /* disable magic, bcast & unicast wakeup sources */
1907         ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1908         if (ret < 0) {
1909                 netdev_warn(dev->net, "Error reading WUCSR\n");
1910                 goto done;
1911         }
1912
1913         val &= ~(WUCSR_MPEN | WUCSR_BCST_EN | WUCSR_PFDA_EN);
1914
1915         ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1916         if (ret < 0) {
1917                 netdev_warn(dev->net, "Error writing WUCSR\n");
1918                 goto done;
1919         }
1920
1921         if (pdata->wolopts & WAKE_PHY) {
1922                 netdev_info(dev->net, "enabling PHY wakeup\n");
1923
1924                 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1925                 if (ret < 0) {
1926                         netdev_warn(dev->net, "Error reading PMT_CTL\n");
1927                         goto done;
1928                 }
1929
1930                 /* clear wol status, enable energy detection */
1931                 val &= ~PMT_CTL_WUPS;
1932                 val |= (PMT_CTL_WUPS_ED | PMT_CTL_ED_EN);
1933
1934                 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1935                 if (ret < 0) {
1936                         netdev_warn(dev->net, "Error writing PMT_CTL\n");
1937                         goto done;
1938                 }
1939         }
1940
1941         if (pdata->wolopts & WAKE_MAGIC) {
1942                 netdev_info(dev->net, "enabling magic packet wakeup\n");
1943                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1944                 if (ret < 0) {
1945                         netdev_warn(dev->net, "Error reading WUCSR\n");
1946                         goto done;
1947                 }
1948
1949                 /* clear any pending magic packet status */
1950                 val |= WUCSR_MPR | WUCSR_MPEN;
1951
1952                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1953                 if (ret < 0) {
1954                         netdev_warn(dev->net, "Error writing WUCSR\n");
1955                         goto done;
1956                 }
1957         }
1958
1959         if (pdata->wolopts & WAKE_BCAST) {
1960                 netdev_info(dev->net, "enabling broadcast detection\n");
1961                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1962                 if (ret < 0) {
1963                         netdev_warn(dev->net, "Error reading WUCSR\n");
1964                         goto done;
1965                 }
1966
1967                 val |= WUCSR_BCAST_FR | WUCSR_BCST_EN;
1968
1969                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1970                 if (ret < 0) {
1971                         netdev_warn(dev->net, "Error writing WUCSR\n");
1972                         goto done;
1973                 }
1974         }
1975
1976         if (pdata->wolopts & WAKE_UCAST) {
1977                 netdev_info(dev->net, "enabling unicast detection\n");
1978                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1979                 if (ret < 0) {
1980                         netdev_warn(dev->net, "Error reading WUCSR\n");
1981                         goto done;
1982                 }
1983
1984                 val |= WUCSR_WUFR | WUCSR_PFDA_EN;
1985
1986                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1987                 if (ret < 0) {
1988                         netdev_warn(dev->net, "Error writing WUCSR\n");
1989                         goto done;
1990                 }
1991         }
1992
1993         /* enable receiver to enable frame reception */
1994         ret = smsc75xx_read_reg_nopm(dev, MAC_RX, &val);
1995         if (ret < 0) {
1996                 netdev_warn(dev->net, "Failed to read MAC_RX: %d\n", ret);
1997                 goto done;
1998         }
1999
2000         val |= MAC_RX_RXEN;
2001
2002         ret = smsc75xx_write_reg_nopm(dev, MAC_RX, val);
2003         if (ret < 0) {
2004                 netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
2005                 goto done;
2006         }
2007
2008         /* some wol options are enabled, so enter SUSPEND0 */
2009         netdev_info(dev->net, "entering SUSPEND0 mode\n");
2010         ret = smsc75xx_enter_suspend0(dev);
2011
2012 done:
2013         /*
2014          * TODO: resume() might need to handle the suspend failure
2015          * in system sleep
2016          */
2017         if (ret && PMSG_IS_AUTO(message))
2018                 usbnet_resume(intf);
2019         return ret;
2020 }
2021
2022 static int smsc75xx_resume(struct usb_interface *intf)
2023 {
2024         struct usbnet *dev = usb_get_intfdata(intf);
2025         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
2026         u8 suspend_flags = pdata->suspend_flags;
2027         int ret;
2028         u32 val;
2029
2030         netdev_dbg(dev->net, "resume suspend_flags=0x%02x\n", suspend_flags);
2031
2032         /* do this first to ensure it's cleared even in error case */
2033         pdata->suspend_flags = 0;
2034
2035         if (suspend_flags & SUSPEND_ALLMODES) {
2036                 /* Disable wakeup sources */
2037                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
2038                 if (ret < 0) {
2039                         netdev_warn(dev->net, "Error reading WUCSR\n");
2040                         return ret;
2041                 }
2042
2043                 val &= ~(WUCSR_WUEN | WUCSR_MPEN | WUCSR_PFDA_EN
2044                         | WUCSR_BCST_EN);
2045
2046                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
2047                 if (ret < 0) {
2048                         netdev_warn(dev->net, "Error writing WUCSR\n");
2049                         return ret;
2050                 }
2051
2052                 /* clear wake-up status */
2053                 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
2054                 if (ret < 0) {
2055                         netdev_warn(dev->net, "Error reading PMT_CTL\n");
2056                         return ret;
2057                 }
2058
2059                 val &= ~PMT_CTL_WOL_EN;
2060                 val |= PMT_CTL_WUPS;
2061
2062                 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
2063                 if (ret < 0) {
2064                         netdev_warn(dev->net, "Error writing PMT_CTL\n");
2065                         return ret;
2066                 }
2067         }
2068
2069         if (suspend_flags & SUSPEND_SUSPEND2) {
2070                 netdev_info(dev->net, "resuming from SUSPEND2\n");
2071
2072                 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
2073                 if (ret < 0) {
2074                         netdev_warn(dev->net, "Error reading PMT_CTL\n");
2075                         return ret;
2076                 }
2077
2078                 val |= PMT_CTL_PHY_PWRUP;
2079
2080                 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
2081                 if (ret < 0) {
2082                         netdev_warn(dev->net, "Error writing PMT_CTL\n");
2083                         return ret;
2084                 }
2085         }
2086
2087         ret = smsc75xx_wait_ready(dev, 1);
2088         if (ret < 0) {
2089                 netdev_warn(dev->net, "device not ready in smsc75xx_resume\n");
2090                 return ret;
2091         }
2092
2093         return usbnet_resume(intf);
2094 }
2095
2096 static void smsc75xx_rx_csum_offload(struct usbnet *dev, struct sk_buff *skb,
2097                                      u32 rx_cmd_a, u32 rx_cmd_b)
2098 {
2099         if (!(dev->net->features & NETIF_F_RXCSUM) ||
2100             unlikely(rx_cmd_a & RX_CMD_A_LCSM)) {
2101                 skb->ip_summed = CHECKSUM_NONE;
2102         } else {
2103                 skb->csum = ntohs((u16)(rx_cmd_b >> RX_CMD_B_CSUM_SHIFT));
2104                 skb->ip_summed = CHECKSUM_COMPLETE;
2105         }
2106 }
2107
2108 static int smsc75xx_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
2109 {
2110         /* This check is no longer done by usbnet */
2111         if (skb->len < dev->net->hard_header_len)
2112                 return 0;
2113
2114         while (skb->len > 0) {
2115                 u32 rx_cmd_a, rx_cmd_b, align_count, size;
2116                 struct sk_buff *ax_skb;
2117                 unsigned char *packet;
2118
2119                 memcpy(&rx_cmd_a, skb->data, sizeof(rx_cmd_a));
2120                 le32_to_cpus(&rx_cmd_a);
2121                 skb_pull(skb, 4);
2122
2123                 memcpy(&rx_cmd_b, skb->data, sizeof(rx_cmd_b));
2124                 le32_to_cpus(&rx_cmd_b);
2125                 skb_pull(skb, 4 + RXW_PADDING);
2126
2127                 packet = skb->data;
2128
2129                 /* get the packet length */
2130                 size = (rx_cmd_a & RX_CMD_A_LEN) - RXW_PADDING;
2131                 align_count = (4 - ((size + RXW_PADDING) % 4)) % 4;
2132
2133                 if (unlikely(rx_cmd_a & RX_CMD_A_RED)) {
2134                         netif_dbg(dev, rx_err, dev->net,
2135                                   "Error rx_cmd_a=0x%08x\n", rx_cmd_a);
2136                         dev->net->stats.rx_errors++;
2137                         dev->net->stats.rx_dropped++;
2138
2139                         if (rx_cmd_a & RX_CMD_A_FCS)
2140                                 dev->net->stats.rx_crc_errors++;
2141                         else if (rx_cmd_a & (RX_CMD_A_LONG | RX_CMD_A_RUNT))
2142                                 dev->net->stats.rx_frame_errors++;
2143                 } else {
2144                         /* MAX_SINGLE_PACKET_SIZE + 4(CRC) + 2(COE) + 4(Vlan) */
2145                         if (unlikely(size > (MAX_SINGLE_PACKET_SIZE + ETH_HLEN + 12))) {
2146                                 netif_dbg(dev, rx_err, dev->net,
2147                                           "size err rx_cmd_a=0x%08x\n",
2148                                           rx_cmd_a);
2149                                 return 0;
2150                         }
2151
2152                         /* last frame in this batch */
2153                         if (skb->len == size) {
2154                                 smsc75xx_rx_csum_offload(dev, skb, rx_cmd_a,
2155                                         rx_cmd_b);
2156
2157                                 skb_trim(skb, skb->len - 4); /* remove fcs */
2158                                 skb->truesize = size + sizeof(struct sk_buff);
2159
2160                                 return 1;
2161                         }
2162
2163                         ax_skb = skb_clone(skb, GFP_ATOMIC);
2164                         if (unlikely(!ax_skb)) {
2165                                 netdev_warn(dev->net, "Error allocating skb\n");
2166                                 return 0;
2167                         }
2168
2169                         ax_skb->len = size;
2170                         ax_skb->data = packet;
2171                         skb_set_tail_pointer(ax_skb, size);
2172
2173                         smsc75xx_rx_csum_offload(dev, ax_skb, rx_cmd_a,
2174                                 rx_cmd_b);
2175
2176                         skb_trim(ax_skb, ax_skb->len - 4); /* remove fcs */
2177                         ax_skb->truesize = size + sizeof(struct sk_buff);
2178
2179                         usbnet_skb_return(dev, ax_skb);
2180                 }
2181
2182                 skb_pull(skb, size);
2183
2184                 /* padding bytes before the next frame starts */
2185                 if (skb->len)
2186                         skb_pull(skb, align_count);
2187         }
2188
2189         return 1;
2190 }
2191
2192 static struct sk_buff *smsc75xx_tx_fixup(struct usbnet *dev,
2193                                          struct sk_buff *skb, gfp_t flags)
2194 {
2195         u32 tx_cmd_a, tx_cmd_b;
2196
2197         if (skb_cow_head(skb, SMSC75XX_TX_OVERHEAD)) {
2198                 dev_kfree_skb_any(skb);
2199                 return NULL;
2200         }
2201
2202         tx_cmd_a = (u32)(skb->len & TX_CMD_A_LEN) | TX_CMD_A_FCS;
2203
2204         if (skb->ip_summed == CHECKSUM_PARTIAL)
2205                 tx_cmd_a |= TX_CMD_A_IPE | TX_CMD_A_TPE;
2206
2207         if (skb_is_gso(skb)) {
2208                 u16 mss = max(skb_shinfo(skb)->gso_size, TX_MSS_MIN);
2209                 tx_cmd_b = (mss << TX_CMD_B_MSS_SHIFT) & TX_CMD_B_MSS;
2210
2211                 tx_cmd_a |= TX_CMD_A_LSO;
2212         } else {
2213                 tx_cmd_b = 0;
2214         }
2215
2216         skb_push(skb, 4);
2217         cpu_to_le32s(&tx_cmd_b);
2218         memcpy(skb->data, &tx_cmd_b, 4);
2219
2220         skb_push(skb, 4);
2221         cpu_to_le32s(&tx_cmd_a);
2222         memcpy(skb->data, &tx_cmd_a, 4);
2223
2224         return skb;
2225 }
2226
2227 static int smsc75xx_manage_power(struct usbnet *dev, int on)
2228 {
2229         dev->intf->needs_remote_wakeup = on;
2230         return 0;
2231 }
2232
2233 static const struct driver_info smsc75xx_info = {
2234         .description    = "smsc75xx USB 2.0 Gigabit Ethernet",
2235         .bind           = smsc75xx_bind,
2236         .unbind         = smsc75xx_unbind,
2237         .link_reset     = smsc75xx_link_reset,
2238         .reset          = smsc75xx_reset,
2239         .rx_fixup       = smsc75xx_rx_fixup,
2240         .tx_fixup       = smsc75xx_tx_fixup,
2241         .status         = smsc75xx_status,
2242         .manage_power   = smsc75xx_manage_power,
2243         .flags          = FLAG_ETHER | FLAG_SEND_ZLP | FLAG_LINK_INTR,
2244 };
2245
2246 static const struct usb_device_id products[] = {
2247         {
2248                 /* SMSC7500 USB Gigabit Ethernet Device */
2249                 USB_DEVICE(USB_VENDOR_ID_SMSC, USB_PRODUCT_ID_LAN7500),
2250                 .driver_info = (unsigned long) &smsc75xx_info,
2251         },
2252         {
2253                 /* SMSC7500 USB Gigabit Ethernet Device */
2254                 USB_DEVICE(USB_VENDOR_ID_SMSC, USB_PRODUCT_ID_LAN7505),
2255                 .driver_info = (unsigned long) &smsc75xx_info,
2256         },
2257         { },            /* END */
2258 };
2259 MODULE_DEVICE_TABLE(usb, products);
2260
2261 static struct usb_driver smsc75xx_driver = {
2262         .name           = SMSC_CHIPNAME,
2263         .id_table       = products,
2264         .probe          = usbnet_probe,
2265         .suspend        = smsc75xx_suspend,
2266         .resume         = smsc75xx_resume,
2267         .reset_resume   = smsc75xx_resume,
2268         .disconnect     = usbnet_disconnect,
2269         .disable_hub_initiated_lpm = 1,
2270         .supports_autosuspend = 1,
2271 };
2272
2273 module_usb_driver(smsc75xx_driver);
2274
2275 MODULE_AUTHOR("Nancy Lin");
2276 MODULE_AUTHOR("Steve Glendinning <steve.glendinning@shawell.net>");
2277 MODULE_DESCRIPTION("SMSC75XX USB 2.0 Gigabit Ethernet Devices");
2278 MODULE_LICENSE("GPL");