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, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  18  *
  19  *****************************************************************************/
  20
  21 #include <linux/module.h>
  22 #include <linux/kmod.h>
  23 #include <linux/init.h>
  24 #include <linux/netdevice.h>
  25 #include <linux/etherdevice.h>
  26 #include <linux/ethtool.h>
  27 #include <linux/mii.h>
  28 #include <linux/usb.h>
  29 #include <linux/bitrev.h>
  30 #include <linux/crc16.h>
  31 #include <linux/crc32.h>
  32 #include <linux/usb/usbnet.h>
  33 #include <linux/slab.h>
  34 #include "smsc75xx.h"
  35
  36 #define SMSC_CHIPNAME                   "smsc75xx"
  37 #define SMSC_DRIVER_VERSION             "1.0.0"
  38 #define HS_USB_PKT_SIZE                 (512)
  39 #define FS_USB_PKT_SIZE                 (64)
  40 #define DEFAULT_HS_BURST_CAP_SIZE       (16 * 1024 + 5 * HS_USB_PKT_SIZE)
  41 #define DEFAULT_FS_BURST_CAP_SIZE       (6 * 1024 + 33 * FS_USB_PKT_SIZE)
  42 #define DEFAULT_BULK_IN_DELAY           (0x00002000)
  43 #define MAX_SINGLE_PACKET_SIZE          (9000)
  44 #define LAN75XX_EEPROM_MAGIC            (0x7500)
  45 #define EEPROM_MAC_OFFSET               (0x01)
  46 #define DEFAULT_TX_CSUM_ENABLE          (true)
  47 #define DEFAULT_RX_CSUM_ENABLE          (true)
  48 #define DEFAULT_TSO_ENABLE              (true)
  49 #define SMSC75XX_INTERNAL_PHY_ID        (1)
  50 #define SMSC75XX_TX_OVERHEAD            (8)
  51 #define MAX_RX_FIFO_SIZE                (20 * 1024)
  52 #define MAX_TX_FIFO_SIZE                (12 * 1024)
  53 #define USB_VENDOR_ID_SMSC              (0x0424)
  54 #define USB_PRODUCT_ID_LAN7500          (0x7500)
  55 #define USB_PRODUCT_ID_LAN7505          (0x7505)
  56 #define RXW_PADDING                     2
  57 #define SUPPORTED_WAKE                  (WAKE_PHY | WAKE_UCAST | WAKE_BCAST | \
  58                                          WAKE_MCAST | WAKE_ARP | WAKE_MAGIC)
  59
  60 #define SUSPEND_SUSPEND0                (0x01)
  61 #define SUSPEND_SUSPEND1                (0x02)
  62 #define SUSPEND_SUSPEND2                (0x04)
  63 #define SUSPEND_SUSPEND3                (0x08)
  64 #define SUSPEND_ALLMODES                (SUSPEND_SUSPEND0 | SUSPEND_SUSPEND1 | \
  65                                          SUSPEND_SUSPEND2 | SUSPEND_SUSPEND3)
  66
  67 struct smsc75xx_priv {
  68         struct usbnet *dev;
  69         u32 rfe_ctl;
  70         u32 wolopts;
  71         u32 multicast_hash_table[DP_SEL_VHF_HASH_LEN];
  72         struct mutex dataport_mutex;
  73         spinlock_t rfe_ctl_lock;
  74         struct work_struct set_multicast;
  75         u8 suspend_flags;
  76 };
  77
  78 struct usb_context {
  79         struct usb_ctrlrequest req;
  80         struct usbnet *dev;
  81 };
  82
  83 static bool turbo_mode = true;
  84 module_param(turbo_mode, bool, 0644);
  85 MODULE_PARM_DESC(turbo_mode, "Enable multiple frames per Rx transaction");
  86
  87 static int __must_check __smsc75xx_read_reg(struct usbnet *dev, u32 index,
  88                                             u32 *data, int in_pm)
  89 {
  90         u32 buf;
  91         int ret;
  92         int (*fn)(struct usbnet *, u8, u8, u16, u16, void *, u16);
  93
  94         BUG_ON(!dev);
  95
  96         if (!in_pm)
  97                 fn = usbnet_read_cmd;
  98         else
  99                 fn = usbnet_read_cmd_nopm;
 100
 101         ret = fn(dev, USB_VENDOR_REQUEST_READ_REGISTER, USB_DIR_IN
 102                  | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 103                  0, index, &buf, 4);
 104         if (unlikely(ret < 0))
 105                 netdev_warn(dev->net, "Failed to read reg index 0x%08x: %d\n",
 106                             index, ret);
 107
 108         le32_to_cpus(&buf);
 109         *data = buf;
 110
 111         return ret;
 112 }
 113
 114 static int __must_check __smsc75xx_write_reg(struct usbnet *dev, u32 index,
 115                                              u32 data, int in_pm)
 116 {
 117         u32 buf;
 118         int ret;
 119         int (*fn)(struct usbnet *, u8, u8, u16, u16, const void *, u16);
 120
 121         BUG_ON(!dev);
 122
 123         if (!in_pm)
 124                 fn = usbnet_write_cmd;
 125         else
 126                 fn = usbnet_write_cmd_nopm;
 127
 128         buf = data;
 129         cpu_to_le32s(&buf);
 130
 131         ret = fn(dev, USB_VENDOR_REQUEST_WRITE_REGISTER, USB_DIR_OUT
 132                  | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 133                  0, index, &buf, 4);
 134         if (unlikely(ret < 0))
 135                 netdev_warn(dev->net, "Failed to write reg index 0x%08x: %d\n",
 136                             index, ret);
 137
 138         return ret;
 139 }
 140
 141 static int __must_check smsc75xx_read_reg_nopm(struct usbnet *dev, u32 index,
 142                                                u32 *data)
 143 {
 144         return __smsc75xx_read_reg(dev, index, data, 1);
 145 }
 146
 147 static int __must_check smsc75xx_write_reg_nopm(struct usbnet *dev, u32 index,
 148                                                 u32 data)
 149 {
 150         return __smsc75xx_write_reg(dev, index, data, 1);
 151 }
 152
 153 static int __must_check smsc75xx_read_reg(struct usbnet *dev, u32 index,
 154                                           u32 *data)
 155 {
 156         return __smsc75xx_read_reg(dev, index, data, 0);
 157 }
 158
 159 static int __must_check smsc75xx_write_reg(struct usbnet *dev, u32 index,
 160                                            u32 data)
 161 {
 162         return __smsc75xx_write_reg(dev, index, data, 0);
 163 }
 164
 165 /* Loop until the read is completed with timeout
 166  * called with phy_mutex held */
 167 static __must_check int __smsc75xx_phy_wait_not_busy(struct usbnet *dev,
 168                                                      int in_pm)
 169 {
 170         unsigned long start_time = jiffies;
 171         u32 val;
 172         int ret;
 173
 174         do {
 175                 ret = __smsc75xx_read_reg(dev, MII_ACCESS, &val, in_pm);
 176                 if (ret < 0) {
 177                         netdev_warn(dev->net, "Error reading MII_ACCESS\n");
 178                         return ret;
 179                 }
 180
 181                 if (!(val & MII_ACCESS_BUSY))
 182                         return 0;
 183         } while (!time_after(jiffies, start_time + HZ));
 184
 185         return -EIO;
 186 }
 187
 188 static int __smsc75xx_mdio_read(struct net_device *netdev, int phy_id, int idx,
 189                                 int in_pm)
 190 {
 191         struct usbnet *dev = netdev_priv(netdev);
 192         u32 val, addr;
 193         int ret;
 194
 195         mutex_lock(&dev->phy_mutex);
 196
 197         /* confirm MII not busy */
 198         ret = __smsc75xx_phy_wait_not_busy(dev, in_pm);
 199         if (ret < 0) {
 200                 netdev_warn(dev->net, "MII is busy in smsc75xx_mdio_read\n");
 201                 goto done;
 202         }
 203
 204         /* set the address, index & direction (read from PHY) */
 205         phy_id &= dev->mii.phy_id_mask;
 206         idx &= dev->mii.reg_num_mask;
 207         addr = ((phy_id << MII_ACCESS_PHY_ADDR_SHIFT) & MII_ACCESS_PHY_ADDR)
 208                 | ((idx << MII_ACCESS_REG_ADDR_SHIFT) & MII_ACCESS_REG_ADDR)
 209                 | MII_ACCESS_READ | MII_ACCESS_BUSY;
 210         ret = __smsc75xx_write_reg(dev, MII_ACCESS, addr, in_pm);
 211         if (ret < 0) {
 212                 netdev_warn(dev->net, "Error writing MII_ACCESS\n");
 213                 goto done;
 214         }
 215
 216         ret = __smsc75xx_phy_wait_not_busy(dev, in_pm);
 217         if (ret < 0) {
 218                 netdev_warn(dev->net, "Timed out reading MII reg %02X\n", idx);
 219                 goto done;
 220         }
 221
 222         ret = __smsc75xx_read_reg(dev, MII_DATA, &val, in_pm);
 223         if (ret < 0) {
 224                 netdev_warn(dev->net, "Error reading MII_DATA\n");
 225                 goto done;
 226         }
 227
 228         ret = (u16)(val & 0xFFFF);
 229
 230 done:
 231         mutex_unlock(&dev->phy_mutex);
 232         return ret;
 233 }
 234
 235 static void __smsc75xx_mdio_write(struct net_device *netdev, int phy_id,
 236                                   int idx, int regval, int in_pm)
 237 {
 238         struct usbnet *dev = netdev_priv(netdev);
 239         u32 val, addr;
 240         int ret;
 241
 242         mutex_lock(&dev->phy_mutex);
 243
 244         /* confirm MII not busy */
 245         ret = __smsc75xx_phy_wait_not_busy(dev, in_pm);
 246         if (ret < 0) {
 247                 netdev_warn(dev->net, "MII is busy in smsc75xx_mdio_write\n");
 248                 goto done;
 249         }
 250
 251         val = regval;
 252         ret = __smsc75xx_write_reg(dev, MII_DATA, val, in_pm);
 253         if (ret < 0) {
 254                 netdev_warn(dev->net, "Error writing MII_DATA\n");
 255                 goto done;
 256         }
 257
 258         /* set the address, index & direction (write to PHY) */
 259         phy_id &= dev->mii.phy_id_mask;
 260         idx &= dev->mii.reg_num_mask;
 261         addr = ((phy_id << MII_ACCESS_PHY_ADDR_SHIFT) & MII_ACCESS_PHY_ADDR)
 262                 | ((idx << MII_ACCESS_REG_ADDR_SHIFT) & MII_ACCESS_REG_ADDR)
 263                 | MII_ACCESS_WRITE | MII_ACCESS_BUSY;
 264         ret = __smsc75xx_write_reg(dev, MII_ACCESS, addr, in_pm);
 265         if (ret < 0) {
 266                 netdev_warn(dev->net, "Error writing MII_ACCESS\n");
 267                 goto done;
 268         }
 269
 270         ret = __smsc75xx_phy_wait_not_busy(dev, in_pm);
 271         if (ret < 0) {
 272                 netdev_warn(dev->net, "Timed out writing MII reg %02X\n", idx);
 273                 goto done;
 274         }
 275
 276 done:
 277         mutex_unlock(&dev->phy_mutex);
 278 }
 279
 280 static int smsc75xx_mdio_read_nopm(struct net_device *netdev, int phy_id,
 281                                    int idx)
 282 {
 283         return __smsc75xx_mdio_read(netdev, phy_id, idx, 1);
 284 }
 285
 286 static void smsc75xx_mdio_write_nopm(struct net_device *netdev, int phy_id,
 287                                      int idx, int regval)
 288 {
 289         __smsc75xx_mdio_write(netdev, phy_id, idx, regval, 1);
 290 }
 291
 292 static int smsc75xx_mdio_read(struct net_device *netdev, int phy_id, int idx)
 293 {
 294         return __smsc75xx_mdio_read(netdev, phy_id, idx, 0);
 295 }
 296
 297 static void smsc75xx_mdio_write(struct net_device *netdev, int phy_id, int idx,
 298                                 int regval)
 299 {
 300         __smsc75xx_mdio_write(netdev, phy_id, idx, regval, 0);
 301 }
 302
 303 static int smsc75xx_wait_eeprom(struct usbnet *dev)
 304 {
 305         unsigned long start_time = jiffies;
 306         u32 val;
 307         int ret;
 308
 309         do {
 310                 ret = smsc75xx_read_reg(dev, E2P_CMD, &val);
 311                 if (ret < 0) {
 312                         netdev_warn(dev->net, "Error reading E2P_CMD\n");
 313                         return ret;
 314                 }
 315
 316                 if (!(val & E2P_CMD_BUSY) || (val & E2P_CMD_TIMEOUT))
 317                         break;
 318                 udelay(40);
 319         } while (!time_after(jiffies, start_time + HZ));
 320
 321         if (val & (E2P_CMD_TIMEOUT | E2P_CMD_BUSY)) {
 322                 netdev_warn(dev->net, "EEPROM read operation timeout\n");
 323                 return -EIO;
 324         }
 325
 326         return 0;
 327 }
 328
 329 static int smsc75xx_eeprom_confirm_not_busy(struct usbnet *dev)
 330 {
 331         unsigned long start_time = jiffies;
 332         u32 val;
 333         int ret;
 334
 335         do {
 336                 ret = smsc75xx_read_reg(dev, E2P_CMD, &val);
 337                 if (ret < 0) {
 338                         netdev_warn(dev->net, "Error reading E2P_CMD\n");
 339                         return ret;
 340                 }
 341
 342                 if (!(val & E2P_CMD_BUSY))
 343                         return 0;
 344
 345                 udelay(40);
 346         } while (!time_after(jiffies, start_time + HZ));
 347
 348         netdev_warn(dev->net, "EEPROM is busy\n");
 349         return -EIO;
 350 }
 351
 352 static int smsc75xx_read_eeprom(struct usbnet *dev, u32 offset, u32 length,
 353                                 u8 *data)
 354 {
 355         u32 val;
 356         int i, ret;
 357
 358         BUG_ON(!dev);
 359         BUG_ON(!data);
 360
 361         ret = smsc75xx_eeprom_confirm_not_busy(dev);
 362         if (ret)
 363                 return ret;
 364
 365         for (i = 0; i < length; i++) {
 366                 val = E2P_CMD_BUSY | E2P_CMD_READ | (offset & E2P_CMD_ADDR);
 367                 ret = smsc75xx_write_reg(dev, E2P_CMD, val);
 368                 if (ret < 0) {
 369                         netdev_warn(dev->net, "Error writing E2P_CMD\n");
 370                         return ret;
 371                 }
 372
 373                 ret = smsc75xx_wait_eeprom(dev);
 374                 if (ret < 0)
 375                         return ret;
 376
 377                 ret = smsc75xx_read_reg(dev, E2P_DATA, &val);
 378                 if (ret < 0) {
 379                         netdev_warn(dev->net, "Error reading E2P_DATA\n");
 380                         return ret;
 381                 }
 382
 383                 data[i] = val & 0xFF;
 384                 offset++;
 385         }
 386
 387         return 0;
 388 }
 389
 390 static int smsc75xx_write_eeprom(struct usbnet *dev, u32 offset, u32 length,
 391                                  u8 *data)
 392 {
 393         u32 val;
 394         int i, ret;
 395
 396         BUG_ON(!dev);
 397         BUG_ON(!data);
 398
 399         ret = smsc75xx_eeprom_confirm_not_busy(dev);
 400         if (ret)
 401                 return ret;
 402
 403         /* Issue write/erase enable command */
 404         val = E2P_CMD_BUSY | E2P_CMD_EWEN;
 405         ret = smsc75xx_write_reg(dev, E2P_CMD, val);
 406         if (ret < 0) {
 407                 netdev_warn(dev->net, "Error writing E2P_CMD\n");
 408                 return ret;
 409         }
 410
 411         ret = smsc75xx_wait_eeprom(dev);
 412         if (ret < 0)
 413                 return ret;
 414
 415         for (i = 0; i < length; i++) {
 416
 417                 /* Fill data register */
 418                 val = data[i];
 419                 ret = smsc75xx_write_reg(dev, E2P_DATA, val);
 420                 if (ret < 0) {
 421                         netdev_warn(dev->net, "Error writing E2P_DATA\n");
 422                         return ret;
 423                 }
 424
 425                 /* Send "write" command */
 426                 val = E2P_CMD_BUSY | E2P_CMD_WRITE | (offset & E2P_CMD_ADDR);
 427                 ret = smsc75xx_write_reg(dev, E2P_CMD, val);
 428                 if (ret < 0) {
 429                         netdev_warn(dev->net, "Error writing E2P_CMD\n");
 430                         return ret;
 431                 }
 432
 433                 ret = smsc75xx_wait_eeprom(dev);
 434                 if (ret < 0)
 435                         return ret;
 436
 437                 offset++;
 438         }
 439
 440         return 0;
 441 }
 442
 443 static int smsc75xx_dataport_wait_not_busy(struct usbnet *dev)
 444 {
 445         int i, ret;
 446
 447         for (i = 0; i < 100; i++) {
 448                 u32 dp_sel;
 449                 ret = smsc75xx_read_reg(dev, DP_SEL, &dp_sel);
 450                 if (ret < 0) {
 451                         netdev_warn(dev->net, "Error reading DP_SEL\n");
 452                         return ret;
 453                 }
 454
 455                 if (dp_sel & DP_SEL_DPRDY)
 456                         return 0;
 457
 458                 udelay(40);
 459         }
 460
 461         netdev_warn(dev->net, "smsc75xx_dataport_wait_not_busy timed out\n");
 462
 463         return -EIO;
 464 }
 465
 466 static int smsc75xx_dataport_write(struct usbnet *dev, u32 ram_select, u32 addr,
 467                                    u32 length, u32 *buf)
 468 {
 469         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 470         u32 dp_sel;
 471         int i, ret;
 472
 473         mutex_lock(&pdata->dataport_mutex);
 474
 475         ret = smsc75xx_dataport_wait_not_busy(dev);
 476         if (ret < 0) {
 477                 netdev_warn(dev->net, "smsc75xx_dataport_write busy on entry\n");
 478                 goto done;
 479         }
 480
 481         ret = smsc75xx_read_reg(dev, DP_SEL, &dp_sel);
 482         if (ret < 0) {
 483                 netdev_warn(dev->net, "Error reading DP_SEL\n");
 484                 goto done;
 485         }
 486
 487         dp_sel &= ~DP_SEL_RSEL;
 488         dp_sel |= ram_select;
 489         ret = smsc75xx_write_reg(dev, DP_SEL, dp_sel);
 490         if (ret < 0) {
 491                 netdev_warn(dev->net, "Error writing DP_SEL\n");
 492                 goto done;
 493         }
 494
 495         for (i = 0; i < length; i++) {
 496                 ret = smsc75xx_write_reg(dev, DP_ADDR, addr + i);
 497                 if (ret < 0) {
 498                         netdev_warn(dev->net, "Error writing DP_ADDR\n");
 499                         goto done;
 500                 }
 501
 502                 ret = smsc75xx_write_reg(dev, DP_DATA, buf[i]);
 503                 if (ret < 0) {
 504                         netdev_warn(dev->net, "Error writing DP_DATA\n");
 505                         goto done;
 506                 }
 507
 508                 ret = smsc75xx_write_reg(dev, DP_CMD, DP_CMD_WRITE);
 509                 if (ret < 0) {
 510                         netdev_warn(dev->net, "Error writing DP_CMD\n");
 511                         goto done;
 512                 }
 513
 514                 ret = smsc75xx_dataport_wait_not_busy(dev);
 515                 if (ret < 0) {
 516                         netdev_warn(dev->net, "smsc75xx_dataport_write timeout\n");
 517                         goto done;
 518                 }
 519         }
 520
 521 done:
 522         mutex_unlock(&pdata->dataport_mutex);
 523         return ret;
 524 }
 525
 526 /* returns hash bit number for given MAC address */
 527 static u32 smsc75xx_hash(char addr[ETH_ALEN])
 528 {
 529         return (ether_crc(ETH_ALEN, addr) >> 23) & 0x1ff;
 530 }
 531
 532 static void smsc75xx_deferred_multicast_write(struct work_struct *param)
 533 {
 534         struct smsc75xx_priv *pdata =
 535                 container_of(param, struct smsc75xx_priv, set_multicast);
 536         struct usbnet *dev = pdata->dev;
 537         int ret;
 538
 539         netif_dbg(dev, drv, dev->net, "deferred multicast write 0x%08x\n",
 540                   pdata->rfe_ctl);
 541
 542         smsc75xx_dataport_write(dev, DP_SEL_VHF, DP_SEL_VHF_VLAN_LEN,
 543                 DP_SEL_VHF_HASH_LEN, pdata->multicast_hash_table);
 544
 545         ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
 546         if (ret < 0)
 547                 netdev_warn(dev->net, "Error writing RFE_CRL\n");
 548 }
 549
 550 static void smsc75xx_set_multicast(struct net_device *netdev)
 551 {
 552         struct usbnet *dev = netdev_priv(netdev);
 553         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 554         unsigned long flags;
 555         int i;
 556
 557         spin_lock_irqsave(&pdata->rfe_ctl_lock, flags);
 558
 559         pdata->rfe_ctl &=
 560                 ~(RFE_CTL_AU | RFE_CTL_AM | RFE_CTL_DPF | RFE_CTL_MHF);
 561         pdata->rfe_ctl |= RFE_CTL_AB;
 562
 563         for (i = 0; i < DP_SEL_VHF_HASH_LEN; i++)
 564                 pdata->multicast_hash_table[i] = 0;
 565
 566         if (dev->net->flags & IFF_PROMISC) {
 567                 netif_dbg(dev, drv, dev->net, "promiscuous mode enabled\n");
 568                 pdata->rfe_ctl |= RFE_CTL_AM | RFE_CTL_AU;
 569         } else if (dev->net->flags & IFF_ALLMULTI) {
 570                 netif_dbg(dev, drv, dev->net, "receive all multicast enabled\n");
 571                 pdata->rfe_ctl |= RFE_CTL_AM | RFE_CTL_DPF;
 572         } else if (!netdev_mc_empty(dev->net)) {
 573                 struct netdev_hw_addr *ha;
 574
 575                 netif_dbg(dev, drv, dev->net, "receive multicast hash filter\n");
 576
 577                 pdata->rfe_ctl |= RFE_CTL_MHF | RFE_CTL_DPF;
 578
 579                 netdev_for_each_mc_addr(ha, netdev) {
 580                         u32 bitnum = smsc75xx_hash(ha->addr);
 581                         pdata->multicast_hash_table[bitnum / 32] |=
 582                                 (1 << (bitnum % 32));
 583                 }
 584         } else {
 585                 netif_dbg(dev, drv, dev->net, "receive own packets only\n");
 586                 pdata->rfe_ctl |= RFE_CTL_DPF;
 587         }
 588
 589         spin_unlock_irqrestore(&pdata->rfe_ctl_lock, flags);
 590
 591         /* defer register writes to a sleepable context */
 592         schedule_work(&pdata->set_multicast);
 593 }
 594
 595 static int smsc75xx_update_flowcontrol(struct usbnet *dev, u8 duplex,
 596                                             u16 lcladv, u16 rmtadv)
 597 {
 598         u32 flow = 0, fct_flow = 0;
 599         int ret;
 600
 601         if (duplex == DUPLEX_FULL) {
 602                 u8 cap = mii_resolve_flowctrl_fdx(lcladv, rmtadv);
 603
 604                 if (cap & FLOW_CTRL_TX) {
 605                         flow = (FLOW_TX_FCEN | 0xFFFF);
 606                         /* set fct_flow thresholds to 20% and 80% */
 607                         fct_flow = (8 << 8) | 32;
 608                 }
 609
 610                 if (cap & FLOW_CTRL_RX)
 611                         flow |= FLOW_RX_FCEN;
 612
 613                 netif_dbg(dev, link, dev->net, "rx pause %s, tx pause %s\n",
 614                           (cap & FLOW_CTRL_RX ? "enabled" : "disabled"),
 615                           (cap & FLOW_CTRL_TX ? "enabled" : "disabled"));
 616         } else {
 617                 netif_dbg(dev, link, dev->net, "half duplex\n");
 618         }
 619
 620         ret = smsc75xx_write_reg(dev, FLOW, flow);
 621         if (ret < 0) {
 622                 netdev_warn(dev->net, "Error writing FLOW\n");
 623                 return ret;
 624         }
 625
 626         ret = smsc75xx_write_reg(dev, FCT_FLOW, fct_flow);
 627         if (ret < 0) {
 628                 netdev_warn(dev->net, "Error writing FCT_FLOW\n");
 629                 return ret;
 630         }
 631
 632         return 0;
 633 }
 634
 635 static int smsc75xx_link_reset(struct usbnet *dev)
 636 {
 637         struct mii_if_info *mii = &dev->mii;
 638         struct ethtool_cmd ecmd = { .cmd = ETHTOOL_GSET };
 639         u16 lcladv, rmtadv;
 640         int ret;
 641
 642         /* write to clear phy interrupt status */
 643         smsc75xx_mdio_write(dev->net, mii->phy_id, PHY_INT_SRC,
 644                 PHY_INT_SRC_CLEAR_ALL);
 645
 646         ret = smsc75xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL);
 647         if (ret < 0) {
 648                 netdev_warn(dev->net, "Error writing INT_STS\n");
 649                 return ret;
 650         }
 651
 652         mii_check_media(mii, 1, 1);
 653         mii_ethtool_gset(&dev->mii, &ecmd);
 654         lcladv = smsc75xx_mdio_read(dev->net, mii->phy_id, MII_ADVERTISE);
 655         rmtadv = smsc75xx_mdio_read(dev->net, mii->phy_id, MII_LPA);
 656
 657         netif_dbg(dev, link, dev->net, "speed: %u duplex: %d lcladv: %04x rmtadv: %04x\n",
 658                   ethtool_cmd_speed(&ecmd), ecmd.duplex, lcladv, rmtadv);
 659
 660         return smsc75xx_update_flowcontrol(dev, ecmd.duplex, lcladv, rmtadv);
 661 }
 662
 663 static void smsc75xx_status(struct usbnet *dev, struct urb *urb)
 664 {
 665         u32 intdata;
 666
 667         if (urb->actual_length != 4) {
 668                 netdev_warn(dev->net, "unexpected urb length %d\n",
 669                             urb->actual_length);
 670                 return;
 671         }
 672
 673         memcpy(&intdata, urb->transfer_buffer, 4);
 674         le32_to_cpus(&intdata);
 675
 676         netif_dbg(dev, link, dev->net, "intdata: 0x%08X\n", intdata);
 677
 678         if (intdata & INT_ENP_PHY_INT)
 679                 usbnet_defer_kevent(dev, EVENT_LINK_RESET);
 680         else
 681                 netdev_warn(dev->net, "unexpected interrupt, intdata=0x%08X\n",
 682                             intdata);
 683 }
 684
 685 static int smsc75xx_ethtool_get_eeprom_len(struct net_device *net)
 686 {
 687         return MAX_EEPROM_SIZE;
 688 }
 689
 690 static int smsc75xx_ethtool_get_eeprom(struct net_device *netdev,
 691                                        struct ethtool_eeprom *ee, u8 *data)
 692 {
 693         struct usbnet *dev = netdev_priv(netdev);
 694
 695         ee->magic = LAN75XX_EEPROM_MAGIC;
 696
 697         return smsc75xx_read_eeprom(dev, ee->offset, ee->len, data);
 698 }
 699
 700 static int smsc75xx_ethtool_set_eeprom(struct net_device *netdev,
 701                                        struct ethtool_eeprom *ee, u8 *data)
 702 {
 703         struct usbnet *dev = netdev_priv(netdev);
 704
 705         if (ee->magic != LAN75XX_EEPROM_MAGIC) {
 706                 netdev_warn(dev->net, "EEPROM: magic value mismatch: 0x%x\n",
 707                             ee->magic);
 708                 return -EINVAL;
 709         }
 710
 711         return smsc75xx_write_eeprom(dev, ee->offset, ee->len, data);
 712 }
 713
 714 static void smsc75xx_ethtool_get_wol(struct net_device *net,
 715                                      struct ethtool_wolinfo *wolinfo)
 716 {
 717         struct usbnet *dev = netdev_priv(net);
 718         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 719
 720         wolinfo->supported = SUPPORTED_WAKE;
 721         wolinfo->wolopts = pdata->wolopts;
 722 }
 723
 724 static int smsc75xx_ethtool_set_wol(struct net_device *net,
 725                                     struct ethtool_wolinfo *wolinfo)
 726 {
 727         struct usbnet *dev = netdev_priv(net);
 728         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 729         int ret;
 730
 731         pdata->wolopts = wolinfo->wolopts & SUPPORTED_WAKE;
 732
 733         ret = device_set_wakeup_enable(&dev->udev->dev, pdata->wolopts);
 734         if (ret < 0)
 735                 netdev_warn(dev->net, "device_set_wakeup_enable error %d\n", ret);
 736
 737         return ret;
 738 }
 739
 740 static const struct ethtool_ops smsc75xx_ethtool_ops = {
 741         .get_link       = usbnet_get_link,
 742         .nway_reset     = usbnet_nway_reset,
 743         .get_drvinfo    = usbnet_get_drvinfo,
 744         .get_msglevel   = usbnet_get_msglevel,
 745         .set_msglevel   = usbnet_set_msglevel,
 746         .get_settings   = usbnet_get_settings,
 747         .set_settings   = usbnet_set_settings,
 748         .get_eeprom_len = smsc75xx_ethtool_get_eeprom_len,
 749         .get_eeprom     = smsc75xx_ethtool_get_eeprom,
 750         .set_eeprom     = smsc75xx_ethtool_set_eeprom,
 751         .get_wol        = smsc75xx_ethtool_get_wol,
 752         .set_wol        = smsc75xx_ethtool_set_wol,
 753 };
 754
 755 static int smsc75xx_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
 756 {
 757         struct usbnet *dev = netdev_priv(netdev);
 758
 759         if (!netif_running(netdev))
 760                 return -EINVAL;
 761
 762         return generic_mii_ioctl(&dev->mii, if_mii(rq), cmd, NULL);
 763 }
 764
 765 static void smsc75xx_init_mac_address(struct usbnet *dev)
 766 {
 767         /* try reading mac address from EEPROM */
 768         if (smsc75xx_read_eeprom(dev, EEPROM_MAC_OFFSET, ETH_ALEN,
 769                         dev->net->dev_addr) == 0) {
 770                 if (is_valid_ether_addr(dev->net->dev_addr)) {
 771                         /* eeprom values are valid so use them */
 772                         netif_dbg(dev, ifup, dev->net,
 773                                   "MAC address read from EEPROM\n");
 774                         return;
 775                 }
 776         }
 777
 778         /* no eeprom, or eeprom values are invalid. generate random MAC */
 779         eth_hw_addr_random(dev->net);
 780         netif_dbg(dev, ifup, dev->net, "MAC address set to eth_random_addr\n");
 781 }
 782
 783 static int smsc75xx_set_mac_address(struct usbnet *dev)
 784 {
 785         u32 addr_lo = dev->net->dev_addr[0] | dev->net->dev_addr[1] << 8 |
 786                 dev->net->dev_addr[2] << 16 | dev->net->dev_addr[3] << 24;
 787         u32 addr_hi = dev->net->dev_addr[4] | dev->net->dev_addr[5] << 8;
 788
 789         int ret = smsc75xx_write_reg(dev, RX_ADDRH, addr_hi);
 790         if (ret < 0) {
 791                 netdev_warn(dev->net, "Failed to write RX_ADDRH: %d\n", ret);
 792                 return ret;
 793         }
 794
 795         ret = smsc75xx_write_reg(dev, RX_ADDRL, addr_lo);
 796         if (ret < 0) {
 797                 netdev_warn(dev->net, "Failed to write RX_ADDRL: %d\n", ret);
 798                 return ret;
 799         }
 800
 801         addr_hi |= ADDR_FILTX_FB_VALID;
 802         ret = smsc75xx_write_reg(dev, ADDR_FILTX, addr_hi);
 803         if (ret < 0) {
 804                 netdev_warn(dev->net, "Failed to write ADDR_FILTX: %d\n", ret);
 805                 return ret;
 806         }
 807
 808         ret = smsc75xx_write_reg(dev, ADDR_FILTX + 4, addr_lo);
 809         if (ret < 0)
 810                 netdev_warn(dev->net, "Failed to write ADDR_FILTX+4: %d\n", ret);
 811
 812         return ret;
 813 }
 814
 815 static int smsc75xx_phy_initialize(struct usbnet *dev)
 816 {
 817         int bmcr, ret, timeout = 0;
 818
 819         /* Initialize MII structure */
 820         dev->mii.dev = dev->net;
 821         dev->mii.mdio_read = smsc75xx_mdio_read;
 822         dev->mii.mdio_write = smsc75xx_mdio_write;
 823         dev->mii.phy_id_mask = 0x1f;
 824         dev->mii.reg_num_mask = 0x1f;
 825         dev->mii.supports_gmii = 1;
 826         dev->mii.phy_id = SMSC75XX_INTERNAL_PHY_ID;
 827
 828         /* reset phy and wait for reset to complete */
 829         smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_BMCR, BMCR_RESET);
 830
 831         do {
 832                 msleep(10);
 833                 bmcr = smsc75xx_mdio_read(dev->net, dev->mii.phy_id, MII_BMCR);
 834                 if (bmcr < 0) {
 835                         netdev_warn(dev->net, "Error reading MII_BMCR\n");
 836                         return bmcr;
 837                 }
 838                 timeout++;
 839         } while ((bmcr & BMCR_RESET) && (timeout < 100));
 840
 841         if (timeout >= 100) {
 842                 netdev_warn(dev->net, "timeout on PHY Reset\n");
 843                 return -EIO;
 844         }
 845
 846         smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_ADVERTISE,
 847                 ADVERTISE_ALL | ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP |
 848                 ADVERTISE_PAUSE_ASYM);
 849         smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_CTRL1000,
 850                 ADVERTISE_1000FULL);
 851
 852         /* read and write to clear phy interrupt status */
 853         ret = smsc75xx_mdio_read(dev->net, dev->mii.phy_id, PHY_INT_SRC);
 854         if (ret < 0) {
 855                 netdev_warn(dev->net, "Error reading PHY_INT_SRC\n");
 856                 return ret;
 857         }
 858
 859         smsc75xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_SRC, 0xffff);
 860
 861         smsc75xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_MASK,
 862                 PHY_INT_MASK_DEFAULT);
 863         mii_nway_restart(&dev->mii);
 864
 865         netif_dbg(dev, ifup, dev->net, "phy initialised successfully\n");
 866         return 0;
 867 }
 868
 869 static int smsc75xx_set_rx_max_frame_length(struct usbnet *dev, int size)
 870 {
 871         int ret = 0;
 872         u32 buf;
 873         bool rxenabled;
 874
 875         ret = smsc75xx_read_reg(dev, MAC_RX, &buf);
 876         if (ret < 0) {
 877                 netdev_warn(dev->net, "Failed to read MAC_RX: %d\n", ret);
 878                 return ret;
 879         }
 880
 881         rxenabled = ((buf & MAC_RX_RXEN) != 0);
 882
 883         if (rxenabled) {
 884                 buf &= ~MAC_RX_RXEN;
 885                 ret = smsc75xx_write_reg(dev, MAC_RX, buf);
 886                 if (ret < 0) {
 887                         netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
 888                         return ret;
 889                 }
 890         }
 891
 892         /* add 4 to size for FCS */
 893         buf &= ~MAC_RX_MAX_SIZE;
 894         buf |= (((size + 4) << MAC_RX_MAX_SIZE_SHIFT) & MAC_RX_MAX_SIZE);
 895
 896         ret = smsc75xx_write_reg(dev, MAC_RX, buf);
 897         if (ret < 0) {
 898                 netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
 899                 return ret;
 900         }
 901
 902         if (rxenabled) {
 903                 buf |= MAC_RX_RXEN;
 904                 ret = smsc75xx_write_reg(dev, MAC_RX, buf);
 905                 if (ret < 0) {
 906                         netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
 907                         return ret;
 908                 }
 909         }
 910
 911         return 0;
 912 }
 913
 914 static int smsc75xx_change_mtu(struct net_device *netdev, int new_mtu)
 915 {
 916         struct usbnet *dev = netdev_priv(netdev);
 917         int ret;
 918
 919         if (new_mtu > MAX_SINGLE_PACKET_SIZE)
 920                 return -EINVAL;
 921
 922         ret = smsc75xx_set_rx_max_frame_length(dev, new_mtu + ETH_HLEN);
 923         if (ret < 0) {
 924                 netdev_warn(dev->net, "Failed to set mac rx frame length\n");
 925                 return ret;
 926         }
 927
 928         return usbnet_change_mtu(netdev, new_mtu);
 929 }
 930
 931 /* Enable or disable Rx checksum offload engine */
 932 static int smsc75xx_set_features(struct net_device *netdev,
 933         netdev_features_t features)
 934 {
 935         struct usbnet *dev = netdev_priv(netdev);
 936         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 937         unsigned long flags;
 938         int ret;
 939
 940         spin_lock_irqsave(&pdata->rfe_ctl_lock, flags);
 941
 942         if (features & NETIF_F_RXCSUM)
 943                 pdata->rfe_ctl |= RFE_CTL_TCPUDP_CKM | RFE_CTL_IP_CKM;
 944         else
 945                 pdata->rfe_ctl &= ~(RFE_CTL_TCPUDP_CKM | RFE_CTL_IP_CKM);
 946
 947         spin_unlock_irqrestore(&pdata->rfe_ctl_lock, flags);
 948         /* it's racing here! */
 949
 950         ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
 951         if (ret < 0)
 952                 netdev_warn(dev->net, "Error writing RFE_CTL\n");
 953
 954         return ret;
 955 }
 956
 957 static int smsc75xx_wait_ready(struct usbnet *dev, int in_pm)
 958 {
 959         int timeout = 0;
 960
 961         do {
 962                 u32 buf;
 963                 int ret;
 964
 965                 ret = __smsc75xx_read_reg(dev, PMT_CTL, &buf, in_pm);
 966
 967                 if (ret < 0) {
 968                         netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret);
 969                         return ret;
 970                 }
 971
 972                 if (buf & PMT_CTL_DEV_RDY)
 973                         return 0;
 974
 975                 msleep(10);
 976                 timeout++;
 977         } while (timeout < 100);
 978
 979         netdev_warn(dev->net, "timeout waiting for device ready\n");
 980         return -EIO;
 981 }
 982
 983 static int smsc75xx_reset(struct usbnet *dev)
 984 {
 985         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 986         u32 buf;
 987         int ret = 0, timeout;
 988
 989         netif_dbg(dev, ifup, dev->net, "entering smsc75xx_reset\n");
 990
 991         ret = smsc75xx_wait_ready(dev, 0);
 992         if (ret < 0) {
 993                 netdev_warn(dev->net, "device not ready in smsc75xx_reset\n");
 994                 return ret;
 995         }
 996
 997         ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
 998         if (ret < 0) {
 999                 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1000                 return ret;
1001         }
1002
1003         buf |= HW_CFG_LRST;
1004
1005         ret = smsc75xx_write_reg(dev, HW_CFG, buf);
1006         if (ret < 0) {
1007                 netdev_warn(dev->net, "Failed to write HW_CFG: %d\n", ret);
1008                 return ret;
1009         }
1010
1011         timeout = 0;
1012         do {
1013                 msleep(10);
1014                 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1015                 if (ret < 0) {
1016                         netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1017                         return ret;
1018                 }
1019                 timeout++;
1020         } while ((buf & HW_CFG_LRST) && (timeout < 100));
1021
1022         if (timeout >= 100) {
1023                 netdev_warn(dev->net, "timeout on completion of Lite Reset\n");
1024                 return -EIO;
1025         }
1026
1027         netif_dbg(dev, ifup, dev->net, "Lite reset complete, resetting PHY\n");
1028
1029         ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
1030         if (ret < 0) {
1031                 netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret);
1032                 return ret;
1033         }
1034
1035         buf |= PMT_CTL_PHY_RST;
1036
1037         ret = smsc75xx_write_reg(dev, PMT_CTL, buf);
1038         if (ret < 0) {
1039                 netdev_warn(dev->net, "Failed to write PMT_CTL: %d\n", ret);
1040                 return ret;
1041         }
1042
1043         timeout = 0;
1044         do {
1045                 msleep(10);
1046                 ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
1047                 if (ret < 0) {
1048                         netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret);
1049                         return ret;
1050                 }
1051                 timeout++;
1052         } while ((buf & PMT_CTL_PHY_RST) && (timeout < 100));
1053
1054         if (timeout >= 100) {
1055                 netdev_warn(dev->net, "timeout waiting for PHY Reset\n");
1056                 return -EIO;
1057         }
1058
1059         netif_dbg(dev, ifup, dev->net, "PHY reset complete\n");
1060
1061         ret = smsc75xx_set_mac_address(dev);
1062         if (ret < 0) {
1063                 netdev_warn(dev->net, "Failed to set mac address\n");
1064                 return ret;
1065         }
1066
1067         netif_dbg(dev, ifup, dev->net, "MAC Address: %pM\n",
1068                   dev->net->dev_addr);
1069
1070         ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1071         if (ret < 0) {
1072                 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1073                 return ret;
1074         }
1075
1076         netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG : 0x%08x\n",
1077                   buf);
1078
1079         buf |= HW_CFG_BIR;
1080
1081         ret = smsc75xx_write_reg(dev, HW_CFG, buf);
1082         if (ret < 0) {
1083                 netdev_warn(dev->net,  "Failed to write HW_CFG: %d\n", ret);
1084                 return ret;
1085         }
1086
1087         ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1088         if (ret < 0) {
1089                 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1090                 return ret;
1091         }
1092
1093         netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG after writing HW_CFG_BIR: 0x%08x\n",
1094                   buf);
1095
1096         if (!turbo_mode) {
1097                 buf = 0;
1098                 dev->rx_urb_size = MAX_SINGLE_PACKET_SIZE;
1099         } else if (dev->udev->speed == USB_SPEED_HIGH) {
1100                 buf = DEFAULT_HS_BURST_CAP_SIZE / HS_USB_PKT_SIZE;
1101                 dev->rx_urb_size = DEFAULT_HS_BURST_CAP_SIZE;
1102         } else {
1103                 buf = DEFAULT_FS_BURST_CAP_SIZE / FS_USB_PKT_SIZE;
1104                 dev->rx_urb_size = DEFAULT_FS_BURST_CAP_SIZE;
1105         }
1106
1107         netif_dbg(dev, ifup, dev->net, "rx_urb_size=%ld\n",
1108                   (ulong)dev->rx_urb_size);
1109
1110         ret = smsc75xx_write_reg(dev, BURST_CAP, buf);
1111         if (ret < 0) {
1112                 netdev_warn(dev->net, "Failed to write BURST_CAP: %d\n", ret);
1113                 return ret;
1114         }
1115
1116         ret = smsc75xx_read_reg(dev, BURST_CAP, &buf);
1117         if (ret < 0) {
1118                 netdev_warn(dev->net, "Failed to read BURST_CAP: %d\n", ret);
1119                 return ret;
1120         }
1121
1122         netif_dbg(dev, ifup, dev->net,
1123                   "Read Value from BURST_CAP after writing: 0x%08x\n", buf);
1124
1125         ret = smsc75xx_write_reg(dev, BULK_IN_DLY, DEFAULT_BULK_IN_DELAY);
1126         if (ret < 0) {
1127                 netdev_warn(dev->net, "Failed to write BULK_IN_DLY: %d\n", ret);
1128                 return ret;
1129         }
1130
1131         ret = smsc75xx_read_reg(dev, BULK_IN_DLY, &buf);
1132         if (ret < 0) {
1133                 netdev_warn(dev->net, "Failed to read BULK_IN_DLY: %d\n", ret);
1134                 return ret;
1135         }
1136
1137         netif_dbg(dev, ifup, dev->net,
1138                   "Read Value from BULK_IN_DLY after writing: 0x%08x\n", buf);
1139
1140         if (turbo_mode) {
1141                 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1142                 if (ret < 0) {
1143                         netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1144                         return ret;
1145                 }
1146
1147                 netif_dbg(dev, ifup, dev->net, "HW_CFG: 0x%08x\n", buf);
1148
1149                 buf |= (HW_CFG_MEF | HW_CFG_BCE);
1150
1151                 ret = smsc75xx_write_reg(dev, HW_CFG, buf);
1152                 if (ret < 0) {
1153                         netdev_warn(dev->net, "Failed to write HW_CFG: %d\n", ret);
1154                         return ret;
1155                 }
1156
1157                 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1158                 if (ret < 0) {
1159                         netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1160                         return ret;
1161                 }
1162
1163                 netif_dbg(dev, ifup, dev->net, "HW_CFG: 0x%08x\n", buf);
1164         }
1165
1166         /* set FIFO sizes */
1167         buf = (MAX_RX_FIFO_SIZE - 512) / 512;
1168         ret = smsc75xx_write_reg(dev, FCT_RX_FIFO_END, buf);
1169         if (ret < 0) {
1170                 netdev_warn(dev->net, "Failed to write FCT_RX_FIFO_END: %d\n", ret);
1171                 return ret;
1172         }
1173
1174         netif_dbg(dev, ifup, dev->net, "FCT_RX_FIFO_END set to 0x%08x\n", buf);
1175
1176         buf = (MAX_TX_FIFO_SIZE - 512) / 512;
1177         ret = smsc75xx_write_reg(dev, FCT_TX_FIFO_END, buf);
1178         if (ret < 0) {
1179                 netdev_warn(dev->net, "Failed to write FCT_TX_FIFO_END: %d\n", ret);
1180                 return ret;
1181         }
1182
1183         netif_dbg(dev, ifup, dev->net, "FCT_TX_FIFO_END set to 0x%08x\n", buf);
1184
1185         ret = smsc75xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL);
1186         if (ret < 0) {
1187                 netdev_warn(dev->net, "Failed to write INT_STS: %d\n", ret);
1188                 return ret;
1189         }
1190
1191         ret = smsc75xx_read_reg(dev, ID_REV, &buf);
1192         if (ret < 0) {
1193                 netdev_warn(dev->net, "Failed to read ID_REV: %d\n", ret);
1194                 return ret;
1195         }
1196
1197         netif_dbg(dev, ifup, dev->net, "ID_REV = 0x%08x\n", buf);
1198
1199         ret = smsc75xx_read_reg(dev, E2P_CMD, &buf);
1200         if (ret < 0) {
1201                 netdev_warn(dev->net, "Failed to read E2P_CMD: %d\n", ret);
1202                 return ret;
1203         }
1204
1205         /* only set default GPIO/LED settings if no EEPROM is detected */
1206         if (!(buf & E2P_CMD_LOADED)) {
1207                 ret = smsc75xx_read_reg(dev, LED_GPIO_CFG, &buf);
1208                 if (ret < 0) {
1209                         netdev_warn(dev->net, "Failed to read LED_GPIO_CFG: %d\n", ret);
1210                         return ret;
1211                 }
1212
1213                 buf &= ~(LED_GPIO_CFG_LED2_FUN_SEL | LED_GPIO_CFG_LED10_FUN_SEL);
1214                 buf |= LED_GPIO_CFG_LEDGPIO_EN | LED_GPIO_CFG_LED2_FUN_SEL;
1215
1216                 ret = smsc75xx_write_reg(dev, LED_GPIO_CFG, buf);
1217                 if (ret < 0) {
1218                         netdev_warn(dev->net, "Failed to write LED_GPIO_CFG: %d\n", ret);
1219                         return ret;
1220                 }
1221         }
1222
1223         ret = smsc75xx_write_reg(dev, FLOW, 0);
1224         if (ret < 0) {
1225                 netdev_warn(dev->net, "Failed to write FLOW: %d\n", ret);
1226                 return ret;
1227         }
1228
1229         ret = smsc75xx_write_reg(dev, FCT_FLOW, 0);
1230         if (ret < 0) {
1231                 netdev_warn(dev->net, "Failed to write FCT_FLOW: %d\n", ret);
1232                 return ret;
1233         }
1234
1235         /* Don't need rfe_ctl_lock during initialisation */
1236         ret = smsc75xx_read_reg(dev, RFE_CTL, &pdata->rfe_ctl);
1237         if (ret < 0) {
1238                 netdev_warn(dev->net, "Failed to read RFE_CTL: %d\n", ret);
1239                 return ret;
1240         }
1241
1242         pdata->rfe_ctl |= RFE_CTL_AB | RFE_CTL_DPF;
1243
1244         ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
1245         if (ret < 0) {
1246                 netdev_warn(dev->net, "Failed to write RFE_CTL: %d\n", ret);
1247                 return ret;
1248         }
1249
1250         ret = smsc75xx_read_reg(dev, RFE_CTL, &pdata->rfe_ctl);
1251         if (ret < 0) {
1252                 netdev_warn(dev->net, "Failed to read RFE_CTL: %d\n", ret);
1253                 return ret;
1254         }
1255
1256         netif_dbg(dev, ifup, dev->net, "RFE_CTL set to 0x%08x\n",
1257                   pdata->rfe_ctl);
1258
1259         /* Enable or disable checksum offload engines */
1260         smsc75xx_set_features(dev->net, dev->net->features);
1261
1262         smsc75xx_set_multicast(dev->net);
1263
1264         ret = smsc75xx_phy_initialize(dev);
1265         if (ret < 0) {
1266                 netdev_warn(dev->net, "Failed to initialize PHY: %d\n", ret);
1267                 return ret;
1268         }
1269
1270         ret = smsc75xx_read_reg(dev, INT_EP_CTL, &buf);
1271         if (ret < 0) {
1272                 netdev_warn(dev->net, "Failed to read INT_EP_CTL: %d\n", ret);
1273                 return ret;
1274         }
1275
1276         /* enable PHY interrupts */
1277         buf |= INT_ENP_PHY_INT;
1278
1279         ret = smsc75xx_write_reg(dev, INT_EP_CTL, buf);
1280         if (ret < 0) {
1281                 netdev_warn(dev->net, "Failed to write INT_EP_CTL: %d\n", ret);
1282                 return ret;
1283         }
1284
1285         /* allow mac to detect speed and duplex from phy */
1286         ret = smsc75xx_read_reg(dev, MAC_CR, &buf);
1287         if (ret < 0) {
1288                 netdev_warn(dev->net, "Failed to read MAC_CR: %d\n", ret);
1289                 return ret;
1290         }
1291
1292         buf |= (MAC_CR_ADD | MAC_CR_ASD);
1293         ret = smsc75xx_write_reg(dev, MAC_CR, buf);
1294         if (ret < 0) {
1295                 netdev_warn(dev->net, "Failed to write MAC_CR: %d\n", ret);
1296                 return ret;
1297         }
1298
1299         ret = smsc75xx_read_reg(dev, MAC_TX, &buf);
1300         if (ret < 0) {
1301                 netdev_warn(dev->net, "Failed to read MAC_TX: %d\n", ret);
1302                 return ret;
1303         }
1304
1305         buf |= MAC_TX_TXEN;
1306
1307         ret = smsc75xx_write_reg(dev, MAC_TX, buf);
1308         if (ret < 0) {
1309                 netdev_warn(dev->net, "Failed to write MAC_TX: %d\n", ret);
1310                 return ret;
1311         }
1312
1313         netif_dbg(dev, ifup, dev->net, "MAC_TX set to 0x%08x\n", buf);
1314
1315         ret = smsc75xx_read_reg(dev, FCT_TX_CTL, &buf);
1316         if (ret < 0) {
1317                 netdev_warn(dev->net, "Failed to read FCT_TX_CTL: %d\n", ret);
1318                 return ret;
1319         }
1320
1321         buf |= FCT_TX_CTL_EN;
1322
1323         ret = smsc75xx_write_reg(dev, FCT_TX_CTL, buf);
1324         if (ret < 0) {
1325                 netdev_warn(dev->net, "Failed to write FCT_TX_CTL: %d\n", ret);
1326                 return ret;
1327         }
1328
1329         netif_dbg(dev, ifup, dev->net, "FCT_TX_CTL set to 0x%08x\n", buf);
1330
1331         ret = smsc75xx_set_rx_max_frame_length(dev, dev->net->mtu + ETH_HLEN);
1332         if (ret < 0) {
1333                 netdev_warn(dev->net, "Failed to set max rx frame length\n");
1334                 return ret;
1335         }
1336
1337         ret = smsc75xx_read_reg(dev, MAC_RX, &buf);
1338         if (ret < 0) {
1339                 netdev_warn(dev->net, "Failed to read MAC_RX: %d\n", ret);
1340                 return ret;
1341         }
1342
1343         buf |= MAC_RX_RXEN;
1344
1345         ret = smsc75xx_write_reg(dev, MAC_RX, buf);
1346         if (ret < 0) {
1347                 netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
1348                 return ret;
1349         }
1350
1351         netif_dbg(dev, ifup, dev->net, "MAC_RX set to 0x%08x\n", buf);
1352
1353         ret = smsc75xx_read_reg(dev, FCT_RX_CTL, &buf);
1354         if (ret < 0) {
1355                 netdev_warn(dev->net, "Failed to read FCT_RX_CTL: %d\n", ret);
1356                 return ret;
1357         }
1358
1359         buf |= FCT_RX_CTL_EN;
1360
1361         ret = smsc75xx_write_reg(dev, FCT_RX_CTL, buf);
1362         if (ret < 0) {
1363                 netdev_warn(dev->net, "Failed to write FCT_RX_CTL: %d\n", ret);
1364                 return ret;
1365         }
1366
1367         netif_dbg(dev, ifup, dev->net, "FCT_RX_CTL set to 0x%08x\n", buf);
1368
1369         netif_dbg(dev, ifup, dev->net, "smsc75xx_reset, return 0\n");
1370         return 0;
1371 }
1372
1373 static const struct net_device_ops smsc75xx_netdev_ops = {
1374         .ndo_open               = usbnet_open,
1375         .ndo_stop               = usbnet_stop,
1376         .ndo_start_xmit         = usbnet_start_xmit,
1377         .ndo_tx_timeout         = usbnet_tx_timeout,
1378         .ndo_change_mtu         = smsc75xx_change_mtu,
1379         .ndo_set_mac_address    = eth_mac_addr,
1380         .ndo_validate_addr      = eth_validate_addr,
1381         .ndo_do_ioctl           = smsc75xx_ioctl,
1382         .ndo_set_rx_mode        = smsc75xx_set_multicast,
1383         .ndo_set_features       = smsc75xx_set_features,
1384 };
1385
1386 static int smsc75xx_bind(struct usbnet *dev, struct usb_interface *intf)
1387 {
1388         struct smsc75xx_priv *pdata = NULL;
1389         int ret;
1390
1391         printk(KERN_INFO SMSC_CHIPNAME " v" SMSC_DRIVER_VERSION "\n");
1392
1393         ret = usbnet_get_endpoints(dev, intf);
1394         if (ret < 0) {
1395                 netdev_warn(dev->net, "usbnet_get_endpoints failed: %d\n", ret);
1396                 return ret;
1397         }
1398
1399         dev->data[0] = (unsigned long)kzalloc(sizeof(struct smsc75xx_priv),
1400                                               GFP_KERNEL);
1401
1402         pdata = (struct smsc75xx_priv *)(dev->data[0]);
1403         if (!pdata)
1404                 return -ENOMEM;
1405
1406         pdata->dev = dev;
1407
1408         spin_lock_init(&pdata->rfe_ctl_lock);
1409         mutex_init(&pdata->dataport_mutex);
1410
1411         INIT_WORK(&pdata->set_multicast, smsc75xx_deferred_multicast_write);
1412
1413         if (DEFAULT_TX_CSUM_ENABLE) {
1414                 dev->net->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
1415                 if (DEFAULT_TSO_ENABLE)
1416                         dev->net->features |= NETIF_F_SG |
1417                                 NETIF_F_TSO | NETIF_F_TSO6;
1418         }
1419         if (DEFAULT_RX_CSUM_ENABLE)
1420                 dev->net->features |= NETIF_F_RXCSUM;
1421
1422         dev->net->hw_features = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
1423                 NETIF_F_SG | NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_RXCSUM;
1424
1425         ret = smsc75xx_wait_ready(dev, 0);
1426         if (ret < 0) {
1427                 netdev_warn(dev->net, "device not ready in smsc75xx_bind\n");
1428                 return ret;
1429         }
1430
1431         smsc75xx_init_mac_address(dev);
1432
1433         /* Init all registers */
1434         ret = smsc75xx_reset(dev);
1435         if (ret < 0) {
1436                 netdev_warn(dev->net, "smsc75xx_reset error %d\n", ret);
1437                 return ret;
1438         }
1439
1440         dev->net->netdev_ops = &smsc75xx_netdev_ops;
1441         dev->net->ethtool_ops = &smsc75xx_ethtool_ops;
1442         dev->net->flags |= IFF_MULTICAST;
1443         dev->net->hard_header_len += SMSC75XX_TX_OVERHEAD;
1444         dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len;
1445         return 0;
1446 }
1447
1448 static void smsc75xx_unbind(struct usbnet *dev, struct usb_interface *intf)
1449 {
1450         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1451         if (pdata) {
1452                 netif_dbg(dev, ifdown, dev->net, "free pdata\n");
1453                 kfree(pdata);
1454                 pdata = NULL;
1455                 dev->data[0] = 0;
1456         }
1457 }
1458
1459 static u16 smsc_crc(const u8 *buffer, size_t len)
1460 {
1461         return bitrev16(crc16(0xFFFF, buffer, len));
1462 }
1463
1464 static int smsc75xx_write_wuff(struct usbnet *dev, int filter, u32 wuf_cfg,
1465                                u32 wuf_mask1)
1466 {
1467         int cfg_base = WUF_CFGX + filter * 4;
1468         int mask_base = WUF_MASKX + filter * 16;
1469         int ret;
1470
1471         ret = smsc75xx_write_reg(dev, cfg_base, wuf_cfg);
1472         if (ret < 0) {
1473                 netdev_warn(dev->net, "Error writing WUF_CFGX\n");
1474                 return ret;
1475         }
1476
1477         ret = smsc75xx_write_reg(dev, mask_base, wuf_mask1);
1478         if (ret < 0) {
1479                 netdev_warn(dev->net, "Error writing WUF_MASKX\n");
1480                 return ret;
1481         }
1482
1483         ret = smsc75xx_write_reg(dev, mask_base + 4, 0);
1484         if (ret < 0) {
1485                 netdev_warn(dev->net, "Error writing WUF_MASKX\n");
1486                 return ret;
1487         }
1488
1489         ret = smsc75xx_write_reg(dev, mask_base + 8, 0);
1490         if (ret < 0) {
1491                 netdev_warn(dev->net, "Error writing WUF_MASKX\n");
1492                 return ret;
1493         }
1494
1495         ret = smsc75xx_write_reg(dev, mask_base + 12, 0);
1496         if (ret < 0) {
1497                 netdev_warn(dev->net, "Error writing WUF_MASKX\n");
1498                 return ret;
1499         }
1500
1501         return 0;
1502 }
1503
1504 static int smsc75xx_enter_suspend0(struct usbnet *dev)
1505 {
1506         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1507         u32 val;
1508         int ret;
1509
1510         ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1511         if (ret < 0) {
1512                 netdev_warn(dev->net, "Error reading PMT_CTL\n");
1513                 return ret;
1514         }
1515
1516         val &= (~(PMT_CTL_SUS_MODE | PMT_CTL_PHY_RST));
1517         val |= PMT_CTL_SUS_MODE_0 | PMT_CTL_WOL_EN | PMT_CTL_WUPS;
1518
1519         ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1520         if (ret < 0) {
1521                 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1522                 return ret;
1523         }
1524
1525         pdata->suspend_flags |= SUSPEND_SUSPEND0;
1526
1527         return 0;
1528 }
1529
1530 static int smsc75xx_enter_suspend1(struct usbnet *dev)
1531 {
1532         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1533         u32 val;
1534         int ret;
1535
1536         ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1537         if (ret < 0) {
1538                 netdev_warn(dev->net, "Error reading PMT_CTL\n");
1539                 return ret;
1540         }
1541
1542         val &= ~(PMT_CTL_SUS_MODE | PMT_CTL_WUPS | PMT_CTL_PHY_RST);
1543         val |= PMT_CTL_SUS_MODE_1;
1544
1545         ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1546         if (ret < 0) {
1547                 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1548                 return ret;
1549         }
1550
1551         /* clear wol status, enable energy detection */
1552         val &= ~PMT_CTL_WUPS;
1553         val |= (PMT_CTL_WUPS_ED | PMT_CTL_ED_EN);
1554
1555         ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1556         if (ret < 0) {
1557                 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1558                 return ret;
1559         }
1560
1561         pdata->suspend_flags |= SUSPEND_SUSPEND1;
1562
1563         return 0;
1564 }
1565
1566 static int smsc75xx_enter_suspend2(struct usbnet *dev)
1567 {
1568         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1569         u32 val;
1570         int ret;
1571
1572         ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1573         if (ret < 0) {
1574                 netdev_warn(dev->net, "Error reading PMT_CTL\n");
1575                 return ret;
1576         }
1577
1578         val &= ~(PMT_CTL_SUS_MODE | PMT_CTL_WUPS | PMT_CTL_PHY_RST);
1579         val |= PMT_CTL_SUS_MODE_2;
1580
1581         ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1582         if (ret < 0) {
1583                 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1584                 return ret;
1585         }
1586
1587         pdata->suspend_flags |= SUSPEND_SUSPEND2;
1588
1589         return 0;
1590 }
1591
1592 static int smsc75xx_enter_suspend3(struct usbnet *dev)
1593 {
1594         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1595         u32 val;
1596         int ret;
1597
1598         ret = smsc75xx_read_reg_nopm(dev, FCT_RX_CTL, &val);
1599         if (ret < 0) {
1600                 netdev_warn(dev->net, "Error reading FCT_RX_CTL\n");
1601                 return ret;
1602         }
1603
1604         if (val & FCT_RX_CTL_RXUSED) {
1605                 netdev_dbg(dev->net, "rx fifo not empty in autosuspend\n");
1606                 return -EBUSY;
1607         }
1608
1609         ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1610         if (ret < 0) {
1611                 netdev_warn(dev->net, "Error reading PMT_CTL\n");
1612                 return ret;
1613         }
1614
1615         val &= ~(PMT_CTL_SUS_MODE | PMT_CTL_WUPS | PMT_CTL_PHY_RST);
1616         val |= PMT_CTL_SUS_MODE_3 | PMT_CTL_RES_CLR_WKP_EN;
1617
1618         ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1619         if (ret < 0) {
1620                 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1621                 return ret;
1622         }
1623
1624         /* clear wol status */
1625         val &= ~PMT_CTL_WUPS;
1626         val |= PMT_CTL_WUPS_WOL;
1627
1628         ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1629         if (ret < 0) {
1630                 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1631                 return ret;
1632         }
1633
1634         pdata->suspend_flags |= SUSPEND_SUSPEND3;
1635
1636         return 0;
1637 }
1638
1639 static int smsc75xx_enable_phy_wakeup_interrupts(struct usbnet *dev, u16 mask)
1640 {
1641         struct mii_if_info *mii = &dev->mii;
1642         int ret;
1643
1644         netdev_dbg(dev->net, "enabling PHY wakeup interrupts\n");
1645
1646         /* read to clear */
1647         ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_SRC);
1648         if (ret < 0) {
1649                 netdev_warn(dev->net, "Error reading PHY_INT_SRC\n");
1650                 return ret;
1651         }
1652
1653         /* enable interrupt source */
1654         ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_MASK);
1655         if (ret < 0) {
1656                 netdev_warn(dev->net, "Error reading PHY_INT_MASK\n");
1657                 return ret;
1658         }
1659
1660         ret |= mask;
1661
1662         smsc75xx_mdio_write_nopm(dev->net, mii->phy_id, PHY_INT_MASK, ret);
1663
1664         return 0;
1665 }
1666
1667 static int smsc75xx_link_ok_nopm(struct usbnet *dev)
1668 {
1669         struct mii_if_info *mii = &dev->mii;
1670         int ret;
1671
1672         /* first, a dummy read, needed to latch some MII phys */
1673         ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR);
1674         if (ret < 0) {
1675                 netdev_warn(dev->net, "Error reading MII_BMSR\n");
1676                 return ret;
1677         }
1678
1679         ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR);
1680         if (ret < 0) {
1681                 netdev_warn(dev->net, "Error reading MII_BMSR\n");
1682                 return ret;
1683         }
1684
1685         return !!(ret & BMSR_LSTATUS);
1686 }
1687
1688 static int smsc75xx_autosuspend(struct usbnet *dev, u32 link_up)
1689 {
1690         int ret;
1691
1692         if (!netif_running(dev->net)) {
1693                 /* interface is ifconfig down so fully power down hw */
1694                 netdev_dbg(dev->net, "autosuspend entering SUSPEND2\n");
1695                 return smsc75xx_enter_suspend2(dev);
1696         }
1697
1698         if (!link_up) {
1699                 /* link is down so enter EDPD mode */
1700                 netdev_dbg(dev->net, "autosuspend entering SUSPEND1\n");
1701
1702                 /* enable PHY wakeup events for if cable is attached */
1703                 ret = smsc75xx_enable_phy_wakeup_interrupts(dev,
1704                         PHY_INT_MASK_ANEG_COMP);
1705                 if (ret < 0) {
1706                         netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1707                         return ret;
1708                 }
1709
1710                 netdev_info(dev->net, "entering SUSPEND1 mode\n");
1711                 return smsc75xx_enter_suspend1(dev);
1712         }
1713
1714         /* enable PHY wakeup events so we remote wakeup if cable is pulled */
1715         ret = smsc75xx_enable_phy_wakeup_interrupts(dev,
1716                 PHY_INT_MASK_LINK_DOWN);
1717         if (ret < 0) {
1718                 netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1719                 return ret;
1720         }
1721
1722         netdev_dbg(dev->net, "autosuspend entering SUSPEND3\n");
1723         return smsc75xx_enter_suspend3(dev);
1724 }
1725
1726 static int smsc75xx_suspend(struct usb_interface *intf, pm_message_t message)
1727 {
1728         struct usbnet *dev = usb_get_intfdata(intf);
1729         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1730         u32 val, link_up;
1731         int ret;
1732
1733         ret = usbnet_suspend(intf, message);
1734         if (ret < 0) {
1735                 netdev_warn(dev->net, "usbnet_suspend error\n");
1736                 return ret;
1737         }
1738
1739         if (pdata->suspend_flags) {
1740                 netdev_warn(dev->net, "error during last resume\n");
1741                 pdata->suspend_flags = 0;
1742         }
1743
1744         /* determine if link is up using only _nopm functions */
1745         link_up = smsc75xx_link_ok_nopm(dev);
1746
1747         if (message.event == PM_EVENT_AUTO_SUSPEND) {
1748                 ret = smsc75xx_autosuspend(dev, link_up);
1749                 goto done;
1750         }
1751
1752         /* if we get this far we're not autosuspending */
1753         /* if no wol options set, or if link is down and we're not waking on
1754          * PHY activity, enter lowest power SUSPEND2 mode
1755          */
1756         if (!(pdata->wolopts & SUPPORTED_WAKE) ||
1757                 !(link_up || (pdata->wolopts & WAKE_PHY))) {
1758                 netdev_info(dev->net, "entering SUSPEND2 mode\n");
1759
1760                 /* disable energy detect (link up) & wake up events */
1761                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1762                 if (ret < 0) {
1763                         netdev_warn(dev->net, "Error reading WUCSR\n");
1764                         goto done;
1765                 }
1766
1767                 val &= ~(WUCSR_MPEN | WUCSR_WUEN);
1768
1769                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1770                 if (ret < 0) {
1771                         netdev_warn(dev->net, "Error writing WUCSR\n");
1772                         goto done;
1773                 }
1774
1775                 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1776                 if (ret < 0) {
1777                         netdev_warn(dev->net, "Error reading PMT_CTL\n");
1778                         goto done;
1779                 }
1780
1781                 val &= ~(PMT_CTL_ED_EN | PMT_CTL_WOL_EN);
1782
1783                 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1784                 if (ret < 0) {
1785                         netdev_warn(dev->net, "Error writing PMT_CTL\n");
1786                         goto done;
1787                 }
1788
1789                 ret = smsc75xx_enter_suspend2(dev);
1790                 goto done;
1791         }
1792
1793         if (pdata->wolopts & WAKE_PHY) {
1794                 ret = smsc75xx_enable_phy_wakeup_interrupts(dev,
1795                         (PHY_INT_MASK_ANEG_COMP | PHY_INT_MASK_LINK_DOWN));
1796                 if (ret < 0) {
1797                         netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1798                         goto done;
1799                 }
1800
1801                 /* if link is down then configure EDPD and enter SUSPEND1,
1802                  * otherwise enter SUSPEND0 below
1803                  */
1804                 if (!link_up) {
1805                         struct mii_if_info *mii = &dev->mii;
1806                         netdev_info(dev->net, "entering SUSPEND1 mode\n");
1807
1808                         /* enable energy detect power-down mode */
1809                         ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id,
1810                                 PHY_MODE_CTRL_STS);
1811                         if (ret < 0) {
1812                                 netdev_warn(dev->net, "Error reading PHY_MODE_CTRL_STS\n");
1813                                 goto done;
1814                         }
1815
1816                         ret |= MODE_CTRL_STS_EDPWRDOWN;
1817
1818                         smsc75xx_mdio_write_nopm(dev->net, mii->phy_id,
1819                                 PHY_MODE_CTRL_STS, ret);
1820
1821                         /* enter SUSPEND1 mode */
1822                         ret = smsc75xx_enter_suspend1(dev);
1823                         goto done;
1824                 }
1825         }
1826
1827         if (pdata->wolopts & (WAKE_MCAST | WAKE_ARP)) {
1828                 int i, filter = 0;
1829
1830                 /* disable all filters */
1831                 for (i = 0; i < WUF_NUM; i++) {
1832                         ret = smsc75xx_write_reg_nopm(dev, WUF_CFGX + i * 4, 0);
1833                         if (ret < 0) {
1834                                 netdev_warn(dev->net, "Error writing WUF_CFGX\n");
1835                                 goto done;
1836                         }
1837                 }
1838
1839                 if (pdata->wolopts & WAKE_MCAST) {
1840                         const u8 mcast[] = {0x01, 0x00, 0x5E};
1841                         netdev_info(dev->net, "enabling multicast detection\n");
1842
1843                         val = WUF_CFGX_EN | WUF_CFGX_ATYPE_MULTICAST
1844                                 | smsc_crc(mcast, 3);
1845                         ret = smsc75xx_write_wuff(dev, filter++, val, 0x0007);
1846                         if (ret < 0) {
1847                                 netdev_warn(dev->net, "Error writing wakeup filter\n");
1848                                 goto done;
1849                         }
1850                 }
1851
1852                 if (pdata->wolopts & WAKE_ARP) {
1853                         const u8 arp[] = {0x08, 0x06};
1854                         netdev_info(dev->net, "enabling ARP detection\n");
1855
1856                         val = WUF_CFGX_EN | WUF_CFGX_ATYPE_ALL | (0x0C << 16)
1857                                 | smsc_crc(arp, 2);
1858                         ret = smsc75xx_write_wuff(dev, filter++, val, 0x0003);
1859                         if (ret < 0) {
1860                                 netdev_warn(dev->net, "Error writing wakeup filter\n");
1861                                 goto done;
1862                         }
1863                 }
1864
1865                 /* clear any pending pattern match packet status */
1866                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1867                 if (ret < 0) {
1868                         netdev_warn(dev->net, "Error reading WUCSR\n");
1869                         goto done;
1870                 }
1871
1872                 val |= WUCSR_WUFR;
1873
1874                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1875                 if (ret < 0) {
1876                         netdev_warn(dev->net, "Error writing WUCSR\n");
1877                         goto done;
1878                 }
1879
1880                 netdev_info(dev->net, "enabling packet match detection\n");
1881                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1882                 if (ret < 0) {
1883                         netdev_warn(dev->net, "Error reading WUCSR\n");
1884                         goto done;
1885                 }
1886
1887                 val |= WUCSR_WUEN;
1888
1889                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1890                 if (ret < 0) {
1891                         netdev_warn(dev->net, "Error writing WUCSR\n");
1892                         goto done;
1893                 }
1894         } else {
1895                 netdev_info(dev->net, "disabling packet match detection\n");
1896                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1897                 if (ret < 0) {
1898                         netdev_warn(dev->net, "Error reading WUCSR\n");
1899                         goto done;
1900                 }
1901
1902                 val &= ~WUCSR_WUEN;
1903
1904                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1905                 if (ret < 0) {
1906                         netdev_warn(dev->net, "Error writing WUCSR\n");
1907                         goto done;
1908                 }
1909         }
1910
1911         /* disable magic, bcast & unicast wakeup sources */
1912         ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1913         if (ret < 0) {
1914                 netdev_warn(dev->net, "Error reading WUCSR\n");
1915                 goto done;
1916         }
1917
1918         val &= ~(WUCSR_MPEN | WUCSR_BCST_EN | WUCSR_PFDA_EN);
1919
1920         ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1921         if (ret < 0) {
1922                 netdev_warn(dev->net, "Error writing WUCSR\n");
1923                 goto done;
1924         }
1925
1926         if (pdata->wolopts & WAKE_PHY) {
1927                 netdev_info(dev->net, "enabling PHY wakeup\n");
1928
1929                 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1930                 if (ret < 0) {
1931                         netdev_warn(dev->net, "Error reading PMT_CTL\n");
1932                         goto done;
1933                 }
1934
1935                 /* clear wol status, enable energy detection */
1936                 val &= ~PMT_CTL_WUPS;
1937                 val |= (PMT_CTL_WUPS_ED | PMT_CTL_ED_EN);
1938
1939                 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1940                 if (ret < 0) {
1941                         netdev_warn(dev->net, "Error writing PMT_CTL\n");
1942                         goto done;
1943                 }
1944         }
1945
1946         if (pdata->wolopts & WAKE_MAGIC) {
1947                 netdev_info(dev->net, "enabling magic packet wakeup\n");
1948                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1949                 if (ret < 0) {
1950                         netdev_warn(dev->net, "Error reading WUCSR\n");
1951                         goto done;
1952                 }
1953
1954                 /* clear any pending magic packet status */
1955                 val |= WUCSR_MPR | WUCSR_MPEN;
1956
1957                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1958                 if (ret < 0) {
1959                         netdev_warn(dev->net, "Error writing WUCSR\n");
1960                         goto done;
1961                 }
1962         }
1963
1964         if (pdata->wolopts & WAKE_BCAST) {
1965                 netdev_info(dev->net, "enabling broadcast detection\n");
1966                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1967                 if (ret < 0) {
1968                         netdev_warn(dev->net, "Error reading WUCSR\n");
1969                         goto done;
1970                 }
1971
1972                 val |= WUCSR_BCAST_FR | WUCSR_BCST_EN;
1973
1974                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1975                 if (ret < 0) {
1976                         netdev_warn(dev->net, "Error writing WUCSR\n");
1977                         goto done;
1978                 }
1979         }
1980
1981         if (pdata->wolopts & WAKE_UCAST) {
1982                 netdev_info(dev->net, "enabling unicast detection\n");
1983                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1984                 if (ret < 0) {
1985                         netdev_warn(dev->net, "Error reading WUCSR\n");
1986                         goto done;
1987                 }
1988
1989                 val |= WUCSR_WUFR | WUCSR_PFDA_EN;
1990
1991                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1992                 if (ret < 0) {
1993                         netdev_warn(dev->net, "Error writing WUCSR\n");
1994                         goto done;
1995                 }
1996         }
1997
1998         /* enable receiver to enable frame reception */
1999         ret = smsc75xx_read_reg_nopm(dev, MAC_RX, &val);
2000         if (ret < 0) {
2001                 netdev_warn(dev->net, "Failed to read MAC_RX: %d\n", ret);
2002                 goto done;
2003         }
2004
2005         val |= MAC_RX_RXEN;
2006
2007         ret = smsc75xx_write_reg_nopm(dev, MAC_RX, val);
2008         if (ret < 0) {
2009                 netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
2010                 goto done;
2011         }
2012
2013         /* some wol options are enabled, so enter SUSPEND0 */
2014         netdev_info(dev->net, "entering SUSPEND0 mode\n");
2015         ret = smsc75xx_enter_suspend0(dev);
2016
2017 done:
2018         /*
2019          * TODO: resume() might need to handle the suspend failure
2020          * in system sleep
2021          */
2022         if (ret && PMSG_IS_AUTO(message))
2023                 usbnet_resume(intf);
2024         return ret;
2025 }
2026
2027 static int smsc75xx_resume(struct usb_interface *intf)
2028 {
2029         struct usbnet *dev = usb_get_intfdata(intf);
2030         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
2031         u8 suspend_flags = pdata->suspend_flags;
2032         int ret;
2033         u32 val;
2034
2035         netdev_dbg(dev->net, "resume suspend_flags=0x%02x\n", suspend_flags);
2036
2037         /* do this first to ensure it's cleared even in error case */
2038         pdata->suspend_flags = 0;
2039
2040         if (suspend_flags & SUSPEND_ALLMODES) {
2041                 /* Disable wakeup sources */
2042                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
2043                 if (ret < 0) {
2044                         netdev_warn(dev->net, "Error reading WUCSR\n");
2045                         return ret;
2046                 }
2047
2048                 val &= ~(WUCSR_WUEN | WUCSR_MPEN | WUCSR_PFDA_EN
2049                         | WUCSR_BCST_EN);
2050
2051                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
2052                 if (ret < 0) {
2053                         netdev_warn(dev->net, "Error writing WUCSR\n");
2054                         return ret;
2055                 }
2056
2057                 /* clear wake-up status */
2058                 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
2059                 if (ret < 0) {
2060                         netdev_warn(dev->net, "Error reading PMT_CTL\n");
2061                         return ret;
2062                 }
2063
2064                 val &= ~PMT_CTL_WOL_EN;
2065                 val |= PMT_CTL_WUPS;
2066
2067                 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
2068                 if (ret < 0) {
2069                         netdev_warn(dev->net, "Error writing PMT_CTL\n");
2070                         return ret;
2071                 }
2072         }
2073
2074         if (suspend_flags & SUSPEND_SUSPEND2) {
2075                 netdev_info(dev->net, "resuming from SUSPEND2\n");
2076
2077                 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
2078                 if (ret < 0) {
2079                         netdev_warn(dev->net, "Error reading PMT_CTL\n");
2080                         return ret;
2081                 }
2082
2083                 val |= PMT_CTL_PHY_PWRUP;
2084
2085                 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
2086                 if (ret < 0) {
2087                         netdev_warn(dev->net, "Error writing PMT_CTL\n");
2088                         return ret;
2089                 }
2090         }
2091
2092         ret = smsc75xx_wait_ready(dev, 1);
2093         if (ret < 0) {
2094                 netdev_warn(dev->net, "device not ready in smsc75xx_resume\n");
2095                 return ret;
2096         }
2097
2098         return usbnet_resume(intf);
2099 }
2100
2101 static void smsc75xx_rx_csum_offload(struct usbnet *dev, struct sk_buff *skb,
2102                                      u32 rx_cmd_a, u32 rx_cmd_b)
2103 {
2104         if (!(dev->net->features & NETIF_F_RXCSUM) ||
2105             unlikely(rx_cmd_a & RX_CMD_A_LCSM)) {
2106                 skb->ip_summed = CHECKSUM_NONE;
2107         } else {
2108                 skb->csum = ntohs((u16)(rx_cmd_b >> RX_CMD_B_CSUM_SHIFT));
2109                 skb->ip_summed = CHECKSUM_COMPLETE;
2110         }
2111 }
2112
2113 static int smsc75xx_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
2114 {
2115         while (skb->len > 0) {
2116                 u32 rx_cmd_a, rx_cmd_b, align_count, size;
2117                 struct sk_buff *ax_skb;
2118                 unsigned char *packet;
2119
2120                 memcpy(&rx_cmd_a, skb->data, sizeof(rx_cmd_a));
2121                 le32_to_cpus(&rx_cmd_a);
2122                 skb_pull(skb, 4);
2123
2124                 memcpy(&rx_cmd_b, skb->data, sizeof(rx_cmd_b));
2125                 le32_to_cpus(&rx_cmd_b);
2126                 skb_pull(skb, 4 + RXW_PADDING);
2127
2128                 packet = skb->data;
2129
2130                 /* get the packet length */
2131                 size = (rx_cmd_a & RX_CMD_A_LEN) - RXW_PADDING;
2132                 align_count = (4 - ((size + RXW_PADDING) % 4)) % 4;
2133
2134                 if (unlikely(rx_cmd_a & RX_CMD_A_RED)) {
2135                         netif_dbg(dev, rx_err, dev->net,
2136                                   "Error rx_cmd_a=0x%08x\n", rx_cmd_a);
2137                         dev->net->stats.rx_errors++;
2138                         dev->net->stats.rx_dropped++;
2139
2140                         if (rx_cmd_a & RX_CMD_A_FCS)
2141                                 dev->net->stats.rx_crc_errors++;
2142                         else if (rx_cmd_a & (RX_CMD_A_LONG | RX_CMD_A_RUNT))
2143                                 dev->net->stats.rx_frame_errors++;
2144                 } else {
2145                         /* MAX_SINGLE_PACKET_SIZE + 4(CRC) + 2(COE) + 4(Vlan) */
2146                         if (unlikely(size > (MAX_SINGLE_PACKET_SIZE + ETH_HLEN + 12))) {
2147                                 netif_dbg(dev, rx_err, dev->net,
2148                                           "size err rx_cmd_a=0x%08x\n",
2149                                           rx_cmd_a);
2150                                 return 0;
2151                         }
2152
2153                         /* last frame in this batch */
2154                         if (skb->len == size) {
2155                                 smsc75xx_rx_csum_offload(dev, skb, rx_cmd_a,
2156                                         rx_cmd_b);
2157
2158                                 skb_trim(skb, skb->len - 4); /* remove fcs */
2159                                 skb->truesize = size + sizeof(struct sk_buff);
2160
2161                                 return 1;
2162                         }
2163
2164                         ax_skb = skb_clone(skb, GFP_ATOMIC);
2165                         if (unlikely(!ax_skb)) {
2166                                 netdev_warn(dev->net, "Error allocating skb\n");
2167                                 return 0;
2168                         }
2169
2170                         ax_skb->len = size;
2171                         ax_skb->data = packet;
2172                         skb_set_tail_pointer(ax_skb, size);
2173
2174                         smsc75xx_rx_csum_offload(dev, ax_skb, rx_cmd_a,
2175                                 rx_cmd_b);
2176
2177                         skb_trim(ax_skb, ax_skb->len - 4); /* remove fcs */
2178                         ax_skb->truesize = size + sizeof(struct sk_buff);
2179
2180                         usbnet_skb_return(dev, ax_skb);
2181                 }
2182
2183                 skb_pull(skb, size);
2184
2185                 /* padding bytes before the next frame starts */
2186                 if (skb->len)
2187                         skb_pull(skb, align_count);
2188         }
2189
2190         if (unlikely(skb->len < 0)) {
2191                 netdev_warn(dev->net, "invalid rx length<0 %d\n", skb->len);
2192                 return 0;
2193         }
2194
2195         return 1;
2196 }
2197
2198 static struct sk_buff *smsc75xx_tx_fixup(struct usbnet *dev,
2199                                          struct sk_buff *skb, gfp_t flags)
2200 {
2201         u32 tx_cmd_a, tx_cmd_b;
2202
2203         skb_linearize(skb);
2204
2205         if (skb_headroom(skb) < SMSC75XX_TX_OVERHEAD) {
2206                 struct sk_buff *skb2 =
2207                         skb_copy_expand(skb, SMSC75XX_TX_OVERHEAD, 0, flags);
2208                 dev_kfree_skb_any(skb);
2209                 skb = skb2;
2210                 if (!skb)
2211                         return NULL;
2212         }
2213
2214         tx_cmd_a = (u32)(skb->len & TX_CMD_A_LEN) | TX_CMD_A_FCS;
2215
2216         if (skb->ip_summed == CHECKSUM_PARTIAL)
2217                 tx_cmd_a |= TX_CMD_A_IPE | TX_CMD_A_TPE;
2218
2219         if (skb_is_gso(skb)) {
2220                 u16 mss = max(skb_shinfo(skb)->gso_size, TX_MSS_MIN);
2221                 tx_cmd_b = (mss << TX_CMD_B_MSS_SHIFT) & TX_CMD_B_MSS;
2222
2223                 tx_cmd_a |= TX_CMD_A_LSO;
2224         } else {
2225                 tx_cmd_b = 0;
2226         }
2227
2228         skb_push(skb, 4);
2229         cpu_to_le32s(&tx_cmd_b);
2230         memcpy(skb->data, &tx_cmd_b, 4);
2231
2232         skb_push(skb, 4);
2233         cpu_to_le32s(&tx_cmd_a);
2234         memcpy(skb->data, &tx_cmd_a, 4);
2235
2236         return skb;
2237 }
2238
2239 static int smsc75xx_manage_power(struct usbnet *dev, int on)
2240 {
2241         dev->intf->needs_remote_wakeup = on;
2242         return 0;
2243 }
2244
2245 static const struct driver_info smsc75xx_info = {
2246         .description    = "smsc75xx USB 2.0 Gigabit Ethernet",
2247         .bind           = smsc75xx_bind,
2248         .unbind         = smsc75xx_unbind,
2249         .link_reset     = smsc75xx_link_reset,
2250         .reset          = smsc75xx_reset,
2251         .rx_fixup       = smsc75xx_rx_fixup,
2252         .tx_fixup       = smsc75xx_tx_fixup,
2253         .status         = smsc75xx_status,
2254         .manage_power   = smsc75xx_manage_power,
2255         .flags          = FLAG_ETHER | FLAG_SEND_ZLP | FLAG_LINK_INTR,
2256 };
2257
2258 static const struct usb_device_id products[] = {
2259         {
2260                 /* SMSC7500 USB Gigabit Ethernet Device */
2261                 USB_DEVICE(USB_VENDOR_ID_SMSC, USB_PRODUCT_ID_LAN7500),
2262                 .driver_info = (unsigned long) &smsc75xx_info,
2263         },
2264         {
2265                 /* SMSC7500 USB Gigabit Ethernet Device */
2266                 USB_DEVICE(USB_VENDOR_ID_SMSC, USB_PRODUCT_ID_LAN7505),
2267                 .driver_info = (unsigned long) &smsc75xx_info,
2268         },
2269         { },            /* END */
2270 };
2271 MODULE_DEVICE_TABLE(usb, products);
2272
2273 static struct usb_driver smsc75xx_driver = {
2274         .name           = SMSC_CHIPNAME,
2275         .id_table       = products,
2276         .probe          = usbnet_probe,
2277         .suspend        = smsc75xx_suspend,
2278         .resume         = smsc75xx_resume,
2279         .reset_resume   = smsc75xx_resume,
2280         .disconnect     = usbnet_disconnect,
2281         .disable_hub_initiated_lpm = 1,
2282         .supports_autosuspend = 1,
2283 };
2284
2285 module_usb_driver(smsc75xx_driver);
2286
2287 MODULE_AUTHOR("Nancy Lin");
2288 MODULE_AUTHOR("Steve Glendinning <steve.glendinning@shawell.net>");
2289 MODULE_DESCRIPTION("SMSC75XX USB 2.0 Gigabit Ethernet Devices");
2290 MODULE_LICENSE("GPL");