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
 918         int ret = smsc75xx_set_rx_max_frame_length(dev, new_mtu);
 919         if (ret < 0) {
 920                 netdev_warn(dev->net, "Failed to set mac rx frame length\n");
 921                 return ret;
 922         }
 923
 924         return usbnet_change_mtu(netdev, new_mtu);
 925 }
 926
 927 /* Enable or disable Rx checksum offload engine */
 928 static int smsc75xx_set_features(struct net_device *netdev,
 929         netdev_features_t features)
 930 {
 931         struct usbnet *dev = netdev_priv(netdev);
 932         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 933         unsigned long flags;
 934         int ret;
 935
 936         spin_lock_irqsave(&pdata->rfe_ctl_lock, flags);
 937
 938         if (features & NETIF_F_RXCSUM)
 939                 pdata->rfe_ctl |= RFE_CTL_TCPUDP_CKM | RFE_CTL_IP_CKM;
 940         else
 941                 pdata->rfe_ctl &= ~(RFE_CTL_TCPUDP_CKM | RFE_CTL_IP_CKM);
 942
 943         spin_unlock_irqrestore(&pdata->rfe_ctl_lock, flags);
 944         /* it's racing here! */
 945
 946         ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
 947         if (ret < 0)
 948                 netdev_warn(dev->net, "Error writing RFE_CTL\n");
 949
 950         return ret;
 951 }
 952
 953 static int smsc75xx_wait_ready(struct usbnet *dev, int in_pm)
 954 {
 955         int timeout = 0;
 956
 957         do {
 958                 u32 buf;
 959                 int ret;
 960
 961                 ret = __smsc75xx_read_reg(dev, PMT_CTL, &buf, in_pm);
 962
 963                 if (ret < 0) {
 964                         netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret);
 965                         return ret;
 966                 }
 967
 968                 if (buf & PMT_CTL_DEV_RDY)
 969                         return 0;
 970
 971                 msleep(10);
 972                 timeout++;
 973         } while (timeout < 100);
 974
 975         netdev_warn(dev->net, "timeout waiting for device ready\n");
 976         return -EIO;
 977 }
 978
 979 static int smsc75xx_reset(struct usbnet *dev)
 980 {
 981         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 982         u32 buf;
 983         int ret = 0, timeout;
 984
 985         netif_dbg(dev, ifup, dev->net, "entering smsc75xx_reset\n");
 986
 987         ret = smsc75xx_wait_ready(dev, 0);
 988         if (ret < 0) {
 989                 netdev_warn(dev->net, "device not ready in smsc75xx_reset\n");
 990                 return ret;
 991         }
 992
 993         ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
 994         if (ret < 0) {
 995                 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
 996                 return ret;
 997         }
 998
 999         buf |= HW_CFG_LRST;
1000
1001         ret = smsc75xx_write_reg(dev, HW_CFG, buf);
1002         if (ret < 0) {
1003                 netdev_warn(dev->net, "Failed to write HW_CFG: %d\n", ret);
1004                 return ret;
1005         }
1006
1007         timeout = 0;
1008         do {
1009                 msleep(10);
1010                 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1011                 if (ret < 0) {
1012                         netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1013                         return ret;
1014                 }
1015                 timeout++;
1016         } while ((buf & HW_CFG_LRST) && (timeout < 100));
1017
1018         if (timeout >= 100) {
1019                 netdev_warn(dev->net, "timeout on completion of Lite Reset\n");
1020                 return -EIO;
1021         }
1022
1023         netif_dbg(dev, ifup, dev->net, "Lite reset complete, resetting PHY\n");
1024
1025         ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
1026         if (ret < 0) {
1027                 netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret);
1028                 return ret;
1029         }
1030
1031         buf |= PMT_CTL_PHY_RST;
1032
1033         ret = smsc75xx_write_reg(dev, PMT_CTL, buf);
1034         if (ret < 0) {
1035                 netdev_warn(dev->net, "Failed to write PMT_CTL: %d\n", ret);
1036                 return ret;
1037         }
1038
1039         timeout = 0;
1040         do {
1041                 msleep(10);
1042                 ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
1043                 if (ret < 0) {
1044                         netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret);
1045                         return ret;
1046                 }
1047                 timeout++;
1048         } while ((buf & PMT_CTL_PHY_RST) && (timeout < 100));
1049
1050         if (timeout >= 100) {
1051                 netdev_warn(dev->net, "timeout waiting for PHY Reset\n");
1052                 return -EIO;
1053         }
1054
1055         netif_dbg(dev, ifup, dev->net, "PHY reset complete\n");
1056
1057         ret = smsc75xx_set_mac_address(dev);
1058         if (ret < 0) {
1059                 netdev_warn(dev->net, "Failed to set mac address\n");
1060                 return ret;
1061         }
1062
1063         netif_dbg(dev, ifup, dev->net, "MAC Address: %pM\n",
1064                   dev->net->dev_addr);
1065
1066         ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1067         if (ret < 0) {
1068                 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1069                 return ret;
1070         }
1071
1072         netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG : 0x%08x\n",
1073                   buf);
1074
1075         buf |= HW_CFG_BIR;
1076
1077         ret = smsc75xx_write_reg(dev, HW_CFG, buf);
1078         if (ret < 0) {
1079                 netdev_warn(dev->net,  "Failed to write HW_CFG: %d\n", ret);
1080                 return ret;
1081         }
1082
1083         ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1084         if (ret < 0) {
1085                 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1086                 return ret;
1087         }
1088
1089         netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG after writing HW_CFG_BIR: 0x%08x\n",
1090                   buf);
1091
1092         if (!turbo_mode) {
1093                 buf = 0;
1094                 dev->rx_urb_size = MAX_SINGLE_PACKET_SIZE;
1095         } else if (dev->udev->speed == USB_SPEED_HIGH) {
1096                 buf = DEFAULT_HS_BURST_CAP_SIZE / HS_USB_PKT_SIZE;
1097                 dev->rx_urb_size = DEFAULT_HS_BURST_CAP_SIZE;
1098         } else {
1099                 buf = DEFAULT_FS_BURST_CAP_SIZE / FS_USB_PKT_SIZE;
1100                 dev->rx_urb_size = DEFAULT_FS_BURST_CAP_SIZE;
1101         }
1102
1103         netif_dbg(dev, ifup, dev->net, "rx_urb_size=%ld\n",
1104                   (ulong)dev->rx_urb_size);
1105
1106         ret = smsc75xx_write_reg(dev, BURST_CAP, buf);
1107         if (ret < 0) {
1108                 netdev_warn(dev->net, "Failed to write BURST_CAP: %d\n", ret);
1109                 return ret;
1110         }
1111
1112         ret = smsc75xx_read_reg(dev, BURST_CAP, &buf);
1113         if (ret < 0) {
1114                 netdev_warn(dev->net, "Failed to read BURST_CAP: %d\n", ret);
1115                 return ret;
1116         }
1117
1118         netif_dbg(dev, ifup, dev->net,
1119                   "Read Value from BURST_CAP after writing: 0x%08x\n", buf);
1120
1121         ret = smsc75xx_write_reg(dev, BULK_IN_DLY, DEFAULT_BULK_IN_DELAY);
1122         if (ret < 0) {
1123                 netdev_warn(dev->net, "Failed to write BULK_IN_DLY: %d\n", ret);
1124                 return ret;
1125         }
1126
1127         ret = smsc75xx_read_reg(dev, BULK_IN_DLY, &buf);
1128         if (ret < 0) {
1129                 netdev_warn(dev->net, "Failed to read BULK_IN_DLY: %d\n", ret);
1130                 return ret;
1131         }
1132
1133         netif_dbg(dev, ifup, dev->net,
1134                   "Read Value from BULK_IN_DLY after writing: 0x%08x\n", buf);
1135
1136         if (turbo_mode) {
1137                 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1138                 if (ret < 0) {
1139                         netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1140                         return ret;
1141                 }
1142
1143                 netif_dbg(dev, ifup, dev->net, "HW_CFG: 0x%08x\n", buf);
1144
1145                 buf |= (HW_CFG_MEF | HW_CFG_BCE);
1146
1147                 ret = smsc75xx_write_reg(dev, HW_CFG, buf);
1148                 if (ret < 0) {
1149                         netdev_warn(dev->net, "Failed to write HW_CFG: %d\n", ret);
1150                         return ret;
1151                 }
1152
1153                 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1154                 if (ret < 0) {
1155                         netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1156                         return ret;
1157                 }
1158
1159                 netif_dbg(dev, ifup, dev->net, "HW_CFG: 0x%08x\n", buf);
1160         }
1161
1162         /* set FIFO sizes */
1163         buf = (MAX_RX_FIFO_SIZE - 512) / 512;
1164         ret = smsc75xx_write_reg(dev, FCT_RX_FIFO_END, buf);
1165         if (ret < 0) {
1166                 netdev_warn(dev->net, "Failed to write FCT_RX_FIFO_END: %d\n", ret);
1167                 return ret;
1168         }
1169
1170         netif_dbg(dev, ifup, dev->net, "FCT_RX_FIFO_END set to 0x%08x\n", buf);
1171
1172         buf = (MAX_TX_FIFO_SIZE - 512) / 512;
1173         ret = smsc75xx_write_reg(dev, FCT_TX_FIFO_END, buf);
1174         if (ret < 0) {
1175                 netdev_warn(dev->net, "Failed to write FCT_TX_FIFO_END: %d\n", ret);
1176                 return ret;
1177         }
1178
1179         netif_dbg(dev, ifup, dev->net, "FCT_TX_FIFO_END set to 0x%08x\n", buf);
1180
1181         ret = smsc75xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL);
1182         if (ret < 0) {
1183                 netdev_warn(dev->net, "Failed to write INT_STS: %d\n", ret);
1184                 return ret;
1185         }
1186
1187         ret = smsc75xx_read_reg(dev, ID_REV, &buf);
1188         if (ret < 0) {
1189                 netdev_warn(dev->net, "Failed to read ID_REV: %d\n", ret);
1190                 return ret;
1191         }
1192
1193         netif_dbg(dev, ifup, dev->net, "ID_REV = 0x%08x\n", buf);
1194
1195         ret = smsc75xx_read_reg(dev, E2P_CMD, &buf);
1196         if (ret < 0) {
1197                 netdev_warn(dev->net, "Failed to read E2P_CMD: %d\n", ret);
1198                 return ret;
1199         }
1200
1201         /* only set default GPIO/LED settings if no EEPROM is detected */
1202         if (!(buf & E2P_CMD_LOADED)) {
1203                 ret = smsc75xx_read_reg(dev, LED_GPIO_CFG, &buf);
1204                 if (ret < 0) {
1205                         netdev_warn(dev->net, "Failed to read LED_GPIO_CFG: %d\n", ret);
1206                         return ret;
1207                 }
1208
1209                 buf &= ~(LED_GPIO_CFG_LED2_FUN_SEL | LED_GPIO_CFG_LED10_FUN_SEL);
1210                 buf |= LED_GPIO_CFG_LEDGPIO_EN | LED_GPIO_CFG_LED2_FUN_SEL;
1211
1212                 ret = smsc75xx_write_reg(dev, LED_GPIO_CFG, buf);
1213                 if (ret < 0) {
1214                         netdev_warn(dev->net, "Failed to write LED_GPIO_CFG: %d\n", ret);
1215                         return ret;
1216                 }
1217         }
1218
1219         ret = smsc75xx_write_reg(dev, FLOW, 0);
1220         if (ret < 0) {
1221                 netdev_warn(dev->net, "Failed to write FLOW: %d\n", ret);
1222                 return ret;
1223         }
1224
1225         ret = smsc75xx_write_reg(dev, FCT_FLOW, 0);
1226         if (ret < 0) {
1227                 netdev_warn(dev->net, "Failed to write FCT_FLOW: %d\n", ret);
1228                 return ret;
1229         }
1230
1231         /* Don't need rfe_ctl_lock during initialisation */
1232         ret = smsc75xx_read_reg(dev, RFE_CTL, &pdata->rfe_ctl);
1233         if (ret < 0) {
1234                 netdev_warn(dev->net, "Failed to read RFE_CTL: %d\n", ret);
1235                 return ret;
1236         }
1237
1238         pdata->rfe_ctl |= RFE_CTL_AB | RFE_CTL_DPF;
1239
1240         ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
1241         if (ret < 0) {
1242                 netdev_warn(dev->net, "Failed to write RFE_CTL: %d\n", ret);
1243                 return ret;
1244         }
1245
1246         ret = smsc75xx_read_reg(dev, RFE_CTL, &pdata->rfe_ctl);
1247         if (ret < 0) {
1248                 netdev_warn(dev->net, "Failed to read RFE_CTL: %d\n", ret);
1249                 return ret;
1250         }
1251
1252         netif_dbg(dev, ifup, dev->net, "RFE_CTL set to 0x%08x\n",
1253                   pdata->rfe_ctl);
1254
1255         /* Enable or disable checksum offload engines */
1256         smsc75xx_set_features(dev->net, dev->net->features);
1257
1258         smsc75xx_set_multicast(dev->net);
1259
1260         ret = smsc75xx_phy_initialize(dev);
1261         if (ret < 0) {
1262                 netdev_warn(dev->net, "Failed to initialize PHY: %d\n", ret);
1263                 return ret;
1264         }
1265
1266         ret = smsc75xx_read_reg(dev, INT_EP_CTL, &buf);
1267         if (ret < 0) {
1268                 netdev_warn(dev->net, "Failed to read INT_EP_CTL: %d\n", ret);
1269                 return ret;
1270         }
1271
1272         /* enable PHY interrupts */
1273         buf |= INT_ENP_PHY_INT;
1274
1275         ret = smsc75xx_write_reg(dev, INT_EP_CTL, buf);
1276         if (ret < 0) {
1277                 netdev_warn(dev->net, "Failed to write INT_EP_CTL: %d\n", ret);
1278                 return ret;
1279         }
1280
1281         /* allow mac to detect speed and duplex from phy */
1282         ret = smsc75xx_read_reg(dev, MAC_CR, &buf);
1283         if (ret < 0) {
1284                 netdev_warn(dev->net, "Failed to read MAC_CR: %d\n", ret);
1285                 return ret;
1286         }
1287
1288         buf |= (MAC_CR_ADD | MAC_CR_ASD);
1289         ret = smsc75xx_write_reg(dev, MAC_CR, buf);
1290         if (ret < 0) {
1291                 netdev_warn(dev->net, "Failed to write MAC_CR: %d\n", ret);
1292                 return ret;
1293         }
1294
1295         ret = smsc75xx_read_reg(dev, MAC_TX, &buf);
1296         if (ret < 0) {
1297                 netdev_warn(dev->net, "Failed to read MAC_TX: %d\n", ret);
1298                 return ret;
1299         }
1300
1301         buf |= MAC_TX_TXEN;
1302
1303         ret = smsc75xx_write_reg(dev, MAC_TX, buf);
1304         if (ret < 0) {
1305                 netdev_warn(dev->net, "Failed to write MAC_TX: %d\n", ret);
1306                 return ret;
1307         }
1308
1309         netif_dbg(dev, ifup, dev->net, "MAC_TX set to 0x%08x\n", buf);
1310
1311         ret = smsc75xx_read_reg(dev, FCT_TX_CTL, &buf);
1312         if (ret < 0) {
1313                 netdev_warn(dev->net, "Failed to read FCT_TX_CTL: %d\n", ret);
1314                 return ret;
1315         }
1316
1317         buf |= FCT_TX_CTL_EN;
1318
1319         ret = smsc75xx_write_reg(dev, FCT_TX_CTL, buf);
1320         if (ret < 0) {
1321                 netdev_warn(dev->net, "Failed to write FCT_TX_CTL: %d\n", ret);
1322                 return ret;
1323         }
1324
1325         netif_dbg(dev, ifup, dev->net, "FCT_TX_CTL set to 0x%08x\n", buf);
1326
1327         ret = smsc75xx_set_rx_max_frame_length(dev, 1514);
1328         if (ret < 0) {
1329                 netdev_warn(dev->net, "Failed to set max rx frame length\n");
1330                 return ret;
1331         }
1332
1333         ret = smsc75xx_read_reg(dev, MAC_RX, &buf);
1334         if (ret < 0) {
1335                 netdev_warn(dev->net, "Failed to read MAC_RX: %d\n", ret);
1336                 return ret;
1337         }
1338
1339         buf |= MAC_RX_RXEN;
1340
1341         ret = smsc75xx_write_reg(dev, MAC_RX, buf);
1342         if (ret < 0) {
1343                 netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
1344                 return ret;
1345         }
1346
1347         netif_dbg(dev, ifup, dev->net, "MAC_RX set to 0x%08x\n", buf);
1348
1349         ret = smsc75xx_read_reg(dev, FCT_RX_CTL, &buf);
1350         if (ret < 0) {
1351                 netdev_warn(dev->net, "Failed to read FCT_RX_CTL: %d\n", ret);
1352                 return ret;
1353         }
1354
1355         buf |= FCT_RX_CTL_EN;
1356
1357         ret = smsc75xx_write_reg(dev, FCT_RX_CTL, buf);
1358         if (ret < 0) {
1359                 netdev_warn(dev->net, "Failed to write FCT_RX_CTL: %d\n", ret);
1360                 return ret;
1361         }
1362
1363         netif_dbg(dev, ifup, dev->net, "FCT_RX_CTL set to 0x%08x\n", buf);
1364
1365         netif_dbg(dev, ifup, dev->net, "smsc75xx_reset, return 0\n");
1366         return 0;
1367 }
1368
1369 static const struct net_device_ops smsc75xx_netdev_ops = {
1370         .ndo_open               = usbnet_open,
1371         .ndo_stop               = usbnet_stop,
1372         .ndo_start_xmit         = usbnet_start_xmit,
1373         .ndo_tx_timeout         = usbnet_tx_timeout,
1374         .ndo_change_mtu         = smsc75xx_change_mtu,
1375         .ndo_set_mac_address    = eth_mac_addr,
1376         .ndo_validate_addr      = eth_validate_addr,
1377         .ndo_do_ioctl           = smsc75xx_ioctl,
1378         .ndo_set_rx_mode        = smsc75xx_set_multicast,
1379         .ndo_set_features       = smsc75xx_set_features,
1380 };
1381
1382 static int smsc75xx_bind(struct usbnet *dev, struct usb_interface *intf)
1383 {
1384         struct smsc75xx_priv *pdata = NULL;
1385         int ret;
1386
1387         printk(KERN_INFO SMSC_CHIPNAME " v" SMSC_DRIVER_VERSION "\n");
1388
1389         ret = usbnet_get_endpoints(dev, intf);
1390         if (ret < 0) {
1391                 netdev_warn(dev->net, "usbnet_get_endpoints failed: %d\n", ret);
1392                 return ret;
1393         }
1394
1395         dev->data[0] = (unsigned long)kzalloc(sizeof(struct smsc75xx_priv),
1396                                               GFP_KERNEL);
1397
1398         pdata = (struct smsc75xx_priv *)(dev->data[0]);
1399         if (!pdata)
1400                 return -ENOMEM;
1401
1402         pdata->dev = dev;
1403
1404         spin_lock_init(&pdata->rfe_ctl_lock);
1405         mutex_init(&pdata->dataport_mutex);
1406
1407         INIT_WORK(&pdata->set_multicast, smsc75xx_deferred_multicast_write);
1408
1409         if (DEFAULT_TX_CSUM_ENABLE) {
1410                 dev->net->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
1411                 if (DEFAULT_TSO_ENABLE)
1412                         dev->net->features |= NETIF_F_SG |
1413                                 NETIF_F_TSO | NETIF_F_TSO6;
1414         }
1415         if (DEFAULT_RX_CSUM_ENABLE)
1416                 dev->net->features |= NETIF_F_RXCSUM;
1417
1418         dev->net->hw_features = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
1419                 NETIF_F_SG | NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_RXCSUM;
1420
1421         ret = smsc75xx_wait_ready(dev, 0);
1422         if (ret < 0) {
1423                 netdev_warn(dev->net, "device not ready in smsc75xx_bind\n");
1424                 return ret;
1425         }
1426
1427         smsc75xx_init_mac_address(dev);
1428
1429         /* Init all registers */
1430         ret = smsc75xx_reset(dev);
1431         if (ret < 0) {
1432                 netdev_warn(dev->net, "smsc75xx_reset error %d\n", ret);
1433                 return ret;
1434         }
1435
1436         dev->net->netdev_ops = &smsc75xx_netdev_ops;
1437         dev->net->ethtool_ops = &smsc75xx_ethtool_ops;
1438         dev->net->flags |= IFF_MULTICAST;
1439         dev->net->hard_header_len += SMSC75XX_TX_OVERHEAD;
1440         dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len;
1441         return 0;
1442 }
1443
1444 static void smsc75xx_unbind(struct usbnet *dev, struct usb_interface *intf)
1445 {
1446         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1447         if (pdata) {
1448                 netif_dbg(dev, ifdown, dev->net, "free pdata\n");
1449                 kfree(pdata);
1450                 pdata = NULL;
1451                 dev->data[0] = 0;
1452         }
1453 }
1454
1455 static u16 smsc_crc(const u8 *buffer, size_t len)
1456 {
1457         return bitrev16(crc16(0xFFFF, buffer, len));
1458 }
1459
1460 static int smsc75xx_write_wuff(struct usbnet *dev, int filter, u32 wuf_cfg,
1461                                u32 wuf_mask1)
1462 {
1463         int cfg_base = WUF_CFGX + filter * 4;
1464         int mask_base = WUF_MASKX + filter * 16;
1465         int ret;
1466
1467         ret = smsc75xx_write_reg(dev, cfg_base, wuf_cfg);
1468         if (ret < 0) {
1469                 netdev_warn(dev->net, "Error writing WUF_CFGX\n");
1470                 return ret;
1471         }
1472
1473         ret = smsc75xx_write_reg(dev, mask_base, wuf_mask1);
1474         if (ret < 0) {
1475                 netdev_warn(dev->net, "Error writing WUF_MASKX\n");
1476                 return ret;
1477         }
1478
1479         ret = smsc75xx_write_reg(dev, mask_base + 4, 0);
1480         if (ret < 0) {
1481                 netdev_warn(dev->net, "Error writing WUF_MASKX\n");
1482                 return ret;
1483         }
1484
1485         ret = smsc75xx_write_reg(dev, mask_base + 8, 0);
1486         if (ret < 0) {
1487                 netdev_warn(dev->net, "Error writing WUF_MASKX\n");
1488                 return ret;
1489         }
1490
1491         ret = smsc75xx_write_reg(dev, mask_base + 12, 0);
1492         if (ret < 0) {
1493                 netdev_warn(dev->net, "Error writing WUF_MASKX\n");
1494                 return ret;
1495         }
1496
1497         return 0;
1498 }
1499
1500 static int smsc75xx_enter_suspend0(struct usbnet *dev)
1501 {
1502         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1503         u32 val;
1504         int ret;
1505
1506         ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1507         if (ret < 0) {
1508                 netdev_warn(dev->net, "Error reading PMT_CTL\n");
1509                 return ret;
1510         }
1511
1512         val &= (~(PMT_CTL_SUS_MODE | PMT_CTL_PHY_RST));
1513         val |= PMT_CTL_SUS_MODE_0 | PMT_CTL_WOL_EN | PMT_CTL_WUPS;
1514
1515         ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1516         if (ret < 0) {
1517                 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1518                 return ret;
1519         }
1520
1521         pdata->suspend_flags |= SUSPEND_SUSPEND0;
1522
1523         return 0;
1524 }
1525
1526 static int smsc75xx_enter_suspend1(struct usbnet *dev)
1527 {
1528         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1529         u32 val;
1530         int ret;
1531
1532         ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1533         if (ret < 0) {
1534                 netdev_warn(dev->net, "Error reading PMT_CTL\n");
1535                 return ret;
1536         }
1537
1538         val &= ~(PMT_CTL_SUS_MODE | PMT_CTL_WUPS | PMT_CTL_PHY_RST);
1539         val |= PMT_CTL_SUS_MODE_1;
1540
1541         ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1542         if (ret < 0) {
1543                 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1544                 return ret;
1545         }
1546
1547         /* clear wol status, enable energy detection */
1548         val &= ~PMT_CTL_WUPS;
1549         val |= (PMT_CTL_WUPS_ED | PMT_CTL_ED_EN);
1550
1551         ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1552         if (ret < 0) {
1553                 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1554                 return ret;
1555         }
1556
1557         pdata->suspend_flags |= SUSPEND_SUSPEND1;
1558
1559         return 0;
1560 }
1561
1562 static int smsc75xx_enter_suspend2(struct usbnet *dev)
1563 {
1564         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1565         u32 val;
1566         int ret;
1567
1568         ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1569         if (ret < 0) {
1570                 netdev_warn(dev->net, "Error reading PMT_CTL\n");
1571                 return ret;
1572         }
1573
1574         val &= ~(PMT_CTL_SUS_MODE | PMT_CTL_WUPS | PMT_CTL_PHY_RST);
1575         val |= PMT_CTL_SUS_MODE_2;
1576
1577         ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1578         if (ret < 0) {
1579                 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1580                 return ret;
1581         }
1582
1583         pdata->suspend_flags |= SUSPEND_SUSPEND2;
1584
1585         return 0;
1586 }
1587
1588 static int smsc75xx_enter_suspend3(struct usbnet *dev)
1589 {
1590         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1591         u32 val;
1592         int ret;
1593
1594         ret = smsc75xx_read_reg_nopm(dev, FCT_RX_CTL, &val);
1595         if (ret < 0) {
1596                 netdev_warn(dev->net, "Error reading FCT_RX_CTL\n");
1597                 return ret;
1598         }
1599
1600         if (val & FCT_RX_CTL_RXUSED) {
1601                 netdev_dbg(dev->net, "rx fifo not empty in autosuspend\n");
1602                 return -EBUSY;
1603         }
1604
1605         ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1606         if (ret < 0) {
1607                 netdev_warn(dev->net, "Error reading PMT_CTL\n");
1608                 return ret;
1609         }
1610
1611         val &= ~(PMT_CTL_SUS_MODE | PMT_CTL_WUPS | PMT_CTL_PHY_RST);
1612         val |= PMT_CTL_SUS_MODE_3 | PMT_CTL_RES_CLR_WKP_EN;
1613
1614         ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1615         if (ret < 0) {
1616                 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1617                 return ret;
1618         }
1619
1620         /* clear wol status */
1621         val &= ~PMT_CTL_WUPS;
1622         val |= PMT_CTL_WUPS_WOL;
1623
1624         ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1625         if (ret < 0) {
1626                 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1627                 return ret;
1628         }
1629
1630         pdata->suspend_flags |= SUSPEND_SUSPEND3;
1631
1632         return 0;
1633 }
1634
1635 static int smsc75xx_enable_phy_wakeup_interrupts(struct usbnet *dev, u16 mask)
1636 {
1637         struct mii_if_info *mii = &dev->mii;
1638         int ret;
1639
1640         netdev_dbg(dev->net, "enabling PHY wakeup interrupts\n");
1641
1642         /* read to clear */
1643         ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_SRC);
1644         if (ret < 0) {
1645                 netdev_warn(dev->net, "Error reading PHY_INT_SRC\n");
1646                 return ret;
1647         }
1648
1649         /* enable interrupt source */
1650         ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_MASK);
1651         if (ret < 0) {
1652                 netdev_warn(dev->net, "Error reading PHY_INT_MASK\n");
1653                 return ret;
1654         }
1655
1656         ret |= mask;
1657
1658         smsc75xx_mdio_write_nopm(dev->net, mii->phy_id, PHY_INT_MASK, ret);
1659
1660         return 0;
1661 }
1662
1663 static int smsc75xx_link_ok_nopm(struct usbnet *dev)
1664 {
1665         struct mii_if_info *mii = &dev->mii;
1666         int ret;
1667
1668         /* first, a dummy read, needed to latch some MII phys */
1669         ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR);
1670         if (ret < 0) {
1671                 netdev_warn(dev->net, "Error reading MII_BMSR\n");
1672                 return ret;
1673         }
1674
1675         ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR);
1676         if (ret < 0) {
1677                 netdev_warn(dev->net, "Error reading MII_BMSR\n");
1678                 return ret;
1679         }
1680
1681         return !!(ret & BMSR_LSTATUS);
1682 }
1683
1684 static int smsc75xx_autosuspend(struct usbnet *dev, u32 link_up)
1685 {
1686         int ret;
1687
1688         if (!netif_running(dev->net)) {
1689                 /* interface is ifconfig down so fully power down hw */
1690                 netdev_dbg(dev->net, "autosuspend entering SUSPEND2\n");
1691                 return smsc75xx_enter_suspend2(dev);
1692         }
1693
1694         if (!link_up) {
1695                 /* link is down so enter EDPD mode */
1696                 netdev_dbg(dev->net, "autosuspend entering SUSPEND1\n");
1697
1698                 /* enable PHY wakeup events for if cable is attached */
1699                 ret = smsc75xx_enable_phy_wakeup_interrupts(dev,
1700                         PHY_INT_MASK_ANEG_COMP);
1701                 if (ret < 0) {
1702                         netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1703                         return ret;
1704                 }
1705
1706                 netdev_info(dev->net, "entering SUSPEND1 mode\n");
1707                 return smsc75xx_enter_suspend1(dev);
1708         }
1709
1710         /* enable PHY wakeup events so we remote wakeup if cable is pulled */
1711         ret = smsc75xx_enable_phy_wakeup_interrupts(dev,
1712                 PHY_INT_MASK_LINK_DOWN);
1713         if (ret < 0) {
1714                 netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1715                 return ret;
1716         }
1717
1718         netdev_dbg(dev->net, "autosuspend entering SUSPEND3\n");
1719         return smsc75xx_enter_suspend3(dev);
1720 }
1721
1722 static int smsc75xx_suspend(struct usb_interface *intf, pm_message_t message)
1723 {
1724         struct usbnet *dev = usb_get_intfdata(intf);
1725         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1726         u32 val, link_up;
1727         int ret;
1728
1729         ret = usbnet_suspend(intf, message);
1730         if (ret < 0) {
1731                 netdev_warn(dev->net, "usbnet_suspend error\n");
1732                 return ret;
1733         }
1734
1735         if (pdata->suspend_flags) {
1736                 netdev_warn(dev->net, "error during last resume\n");
1737                 pdata->suspend_flags = 0;
1738         }
1739
1740         /* determine if link is up using only _nopm functions */
1741         link_up = smsc75xx_link_ok_nopm(dev);
1742
1743         if (message.event == PM_EVENT_AUTO_SUSPEND) {
1744                 ret = smsc75xx_autosuspend(dev, link_up);
1745                 goto done;
1746         }
1747
1748         /* if we get this far we're not autosuspending */
1749         /* if no wol options set, or if link is down and we're not waking on
1750          * PHY activity, enter lowest power SUSPEND2 mode
1751          */
1752         if (!(pdata->wolopts & SUPPORTED_WAKE) ||
1753                 !(link_up || (pdata->wolopts & WAKE_PHY))) {
1754                 netdev_info(dev->net, "entering SUSPEND2 mode\n");
1755
1756                 /* disable energy detect (link up) & wake up events */
1757                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1758                 if (ret < 0) {
1759                         netdev_warn(dev->net, "Error reading WUCSR\n");
1760                         goto done;
1761                 }
1762
1763                 val &= ~(WUCSR_MPEN | WUCSR_WUEN);
1764
1765                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1766                 if (ret < 0) {
1767                         netdev_warn(dev->net, "Error writing WUCSR\n");
1768                         goto done;
1769                 }
1770
1771                 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1772                 if (ret < 0) {
1773                         netdev_warn(dev->net, "Error reading PMT_CTL\n");
1774                         goto done;
1775                 }
1776
1777                 val &= ~(PMT_CTL_ED_EN | PMT_CTL_WOL_EN);
1778
1779                 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1780                 if (ret < 0) {
1781                         netdev_warn(dev->net, "Error writing PMT_CTL\n");
1782                         goto done;
1783                 }
1784
1785                 ret = smsc75xx_enter_suspend2(dev);
1786                 goto done;
1787         }
1788
1789         if (pdata->wolopts & WAKE_PHY) {
1790                 ret = smsc75xx_enable_phy_wakeup_interrupts(dev,
1791                         (PHY_INT_MASK_ANEG_COMP | PHY_INT_MASK_LINK_DOWN));
1792                 if (ret < 0) {
1793                         netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1794                         goto done;
1795                 }
1796
1797                 /* if link is down then configure EDPD and enter SUSPEND1,
1798                  * otherwise enter SUSPEND0 below
1799                  */
1800                 if (!link_up) {
1801                         struct mii_if_info *mii = &dev->mii;
1802                         netdev_info(dev->net, "entering SUSPEND1 mode\n");
1803
1804                         /* enable energy detect power-down mode */
1805                         ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id,
1806                                 PHY_MODE_CTRL_STS);
1807                         if (ret < 0) {
1808                                 netdev_warn(dev->net, "Error reading PHY_MODE_CTRL_STS\n");
1809                                 goto done;
1810                         }
1811
1812                         ret |= MODE_CTRL_STS_EDPWRDOWN;
1813
1814                         smsc75xx_mdio_write_nopm(dev->net, mii->phy_id,
1815                                 PHY_MODE_CTRL_STS, ret);
1816
1817                         /* enter SUSPEND1 mode */
1818                         ret = smsc75xx_enter_suspend1(dev);
1819                         goto done;
1820                 }
1821         }
1822
1823         if (pdata->wolopts & (WAKE_MCAST | WAKE_ARP)) {
1824                 int i, filter = 0;
1825
1826                 /* disable all filters */
1827                 for (i = 0; i < WUF_NUM; i++) {
1828                         ret = smsc75xx_write_reg_nopm(dev, WUF_CFGX + i * 4, 0);
1829                         if (ret < 0) {
1830                                 netdev_warn(dev->net, "Error writing WUF_CFGX\n");
1831                                 goto done;
1832                         }
1833                 }
1834
1835                 if (pdata->wolopts & WAKE_MCAST) {
1836                         const u8 mcast[] = {0x01, 0x00, 0x5E};
1837                         netdev_info(dev->net, "enabling multicast detection\n");
1838
1839                         val = WUF_CFGX_EN | WUF_CFGX_ATYPE_MULTICAST
1840                                 | smsc_crc(mcast, 3);
1841                         ret = smsc75xx_write_wuff(dev, filter++, val, 0x0007);
1842                         if (ret < 0) {
1843                                 netdev_warn(dev->net, "Error writing wakeup filter\n");
1844                                 goto done;
1845                         }
1846                 }
1847
1848                 if (pdata->wolopts & WAKE_ARP) {
1849                         const u8 arp[] = {0x08, 0x06};
1850                         netdev_info(dev->net, "enabling ARP detection\n");
1851
1852                         val = WUF_CFGX_EN | WUF_CFGX_ATYPE_ALL | (0x0C << 16)
1853                                 | smsc_crc(arp, 2);
1854                         ret = smsc75xx_write_wuff(dev, filter++, val, 0x0003);
1855                         if (ret < 0) {
1856                                 netdev_warn(dev->net, "Error writing wakeup filter\n");
1857                                 goto done;
1858                         }
1859                 }
1860
1861                 /* clear any pending pattern match packet status */
1862                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1863                 if (ret < 0) {
1864                         netdev_warn(dev->net, "Error reading WUCSR\n");
1865                         goto done;
1866                 }
1867
1868                 val |= WUCSR_WUFR;
1869
1870                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1871                 if (ret < 0) {
1872                         netdev_warn(dev->net, "Error writing WUCSR\n");
1873                         goto done;
1874                 }
1875
1876                 netdev_info(dev->net, "enabling packet match detection\n");
1877                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1878                 if (ret < 0) {
1879                         netdev_warn(dev->net, "Error reading WUCSR\n");
1880                         goto done;
1881                 }
1882
1883                 val |= WUCSR_WUEN;
1884
1885                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1886                 if (ret < 0) {
1887                         netdev_warn(dev->net, "Error writing WUCSR\n");
1888                         goto done;
1889                 }
1890         } else {
1891                 netdev_info(dev->net, "disabling packet match detection\n");
1892                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1893                 if (ret < 0) {
1894                         netdev_warn(dev->net, "Error reading WUCSR\n");
1895                         goto done;
1896                 }
1897
1898                 val &= ~WUCSR_WUEN;
1899
1900                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1901                 if (ret < 0) {
1902                         netdev_warn(dev->net, "Error writing WUCSR\n");
1903                         goto done;
1904                 }
1905         }
1906
1907         /* disable magic, bcast & unicast wakeup sources */
1908         ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1909         if (ret < 0) {
1910                 netdev_warn(dev->net, "Error reading WUCSR\n");
1911                 goto done;
1912         }
1913
1914         val &= ~(WUCSR_MPEN | WUCSR_BCST_EN | WUCSR_PFDA_EN);
1915
1916         ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1917         if (ret < 0) {
1918                 netdev_warn(dev->net, "Error writing WUCSR\n");
1919                 goto done;
1920         }
1921
1922         if (pdata->wolopts & WAKE_PHY) {
1923                 netdev_info(dev->net, "enabling PHY wakeup\n");
1924
1925                 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1926                 if (ret < 0) {
1927                         netdev_warn(dev->net, "Error reading PMT_CTL\n");
1928                         goto done;
1929                 }
1930
1931                 /* clear wol status, enable energy detection */
1932                 val &= ~PMT_CTL_WUPS;
1933                 val |= (PMT_CTL_WUPS_ED | PMT_CTL_ED_EN);
1934
1935                 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1936                 if (ret < 0) {
1937                         netdev_warn(dev->net, "Error writing PMT_CTL\n");
1938                         goto done;
1939                 }
1940         }
1941
1942         if (pdata->wolopts & WAKE_MAGIC) {
1943                 netdev_info(dev->net, "enabling magic packet wakeup\n");
1944                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1945                 if (ret < 0) {
1946                         netdev_warn(dev->net, "Error reading WUCSR\n");
1947                         goto done;
1948                 }
1949
1950                 /* clear any pending magic packet status */
1951                 val |= WUCSR_MPR | WUCSR_MPEN;
1952
1953                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1954                 if (ret < 0) {
1955                         netdev_warn(dev->net, "Error writing WUCSR\n");
1956                         goto done;
1957                 }
1958         }
1959
1960         if (pdata->wolopts & WAKE_BCAST) {
1961                 netdev_info(dev->net, "enabling broadcast detection\n");
1962                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1963                 if (ret < 0) {
1964                         netdev_warn(dev->net, "Error reading WUCSR\n");
1965                         goto done;
1966                 }
1967
1968                 val |= WUCSR_BCAST_FR | WUCSR_BCST_EN;
1969
1970                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1971                 if (ret < 0) {
1972                         netdev_warn(dev->net, "Error writing WUCSR\n");
1973                         goto done;
1974                 }
1975         }
1976
1977         if (pdata->wolopts & WAKE_UCAST) {
1978                 netdev_info(dev->net, "enabling unicast detection\n");
1979                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1980                 if (ret < 0) {
1981                         netdev_warn(dev->net, "Error reading WUCSR\n");
1982                         goto done;
1983                 }
1984
1985                 val |= WUCSR_WUFR | WUCSR_PFDA_EN;
1986
1987                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1988                 if (ret < 0) {
1989                         netdev_warn(dev->net, "Error writing WUCSR\n");
1990                         goto done;
1991                 }
1992         }
1993
1994         /* enable receiver to enable frame reception */
1995         ret = smsc75xx_read_reg_nopm(dev, MAC_RX, &val);
1996         if (ret < 0) {
1997                 netdev_warn(dev->net, "Failed to read MAC_RX: %d\n", ret);
1998                 goto done;
1999         }
2000
2001         val |= MAC_RX_RXEN;
2002
2003         ret = smsc75xx_write_reg_nopm(dev, MAC_RX, val);
2004         if (ret < 0) {
2005                 netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
2006                 goto done;
2007         }
2008
2009         /* some wol options are enabled, so enter SUSPEND0 */
2010         netdev_info(dev->net, "entering SUSPEND0 mode\n");
2011         ret = smsc75xx_enter_suspend0(dev);
2012
2013 done:
2014         if (ret)
2015                 usbnet_resume(intf);
2016         return ret;
2017 }
2018
2019 static int smsc75xx_resume(struct usb_interface *intf)
2020 {
2021         struct usbnet *dev = usb_get_intfdata(intf);
2022         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
2023         u8 suspend_flags = pdata->suspend_flags;
2024         int ret;
2025         u32 val;
2026
2027         netdev_dbg(dev->net, "resume suspend_flags=0x%02x\n", suspend_flags);
2028
2029         /* do this first to ensure it's cleared even in error case */
2030         pdata->suspend_flags = 0;
2031
2032         if (suspend_flags & SUSPEND_ALLMODES) {
2033                 /* Disable wakeup sources */
2034                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
2035                 if (ret < 0) {
2036                         netdev_warn(dev->net, "Error reading WUCSR\n");
2037                         return ret;
2038                 }
2039
2040                 val &= ~(WUCSR_WUEN | WUCSR_MPEN | WUCSR_PFDA_EN
2041                         | WUCSR_BCST_EN);
2042
2043                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
2044                 if (ret < 0) {
2045                         netdev_warn(dev->net, "Error writing WUCSR\n");
2046                         return ret;
2047                 }
2048
2049                 /* clear wake-up status */
2050                 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
2051                 if (ret < 0) {
2052                         netdev_warn(dev->net, "Error reading PMT_CTL\n");
2053                         return ret;
2054                 }
2055
2056                 val &= ~PMT_CTL_WOL_EN;
2057                 val |= PMT_CTL_WUPS;
2058
2059                 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
2060                 if (ret < 0) {
2061                         netdev_warn(dev->net, "Error writing PMT_CTL\n");
2062                         return ret;
2063                 }
2064         }
2065
2066         if (suspend_flags & SUSPEND_SUSPEND2) {
2067                 netdev_info(dev->net, "resuming from SUSPEND2\n");
2068
2069                 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
2070                 if (ret < 0) {
2071                         netdev_warn(dev->net, "Error reading PMT_CTL\n");
2072                         return ret;
2073                 }
2074
2075                 val |= PMT_CTL_PHY_PWRUP;
2076
2077                 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
2078                 if (ret < 0) {
2079                         netdev_warn(dev->net, "Error writing PMT_CTL\n");
2080                         return ret;
2081                 }
2082         }
2083
2084         ret = smsc75xx_wait_ready(dev, 1);
2085         if (ret < 0) {
2086                 netdev_warn(dev->net, "device not ready in smsc75xx_resume\n");
2087                 return ret;
2088         }
2089
2090         return usbnet_resume(intf);
2091 }
2092
2093 static void smsc75xx_rx_csum_offload(struct usbnet *dev, struct sk_buff *skb,
2094                                      u32 rx_cmd_a, u32 rx_cmd_b)
2095 {
2096         if (!(dev->net->features & NETIF_F_RXCSUM) ||
2097             unlikely(rx_cmd_a & RX_CMD_A_LCSM)) {
2098                 skb->ip_summed = CHECKSUM_NONE;
2099         } else {
2100                 skb->csum = ntohs((u16)(rx_cmd_b >> RX_CMD_B_CSUM_SHIFT));
2101                 skb->ip_summed = CHECKSUM_COMPLETE;
2102         }
2103 }
2104
2105 static int smsc75xx_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
2106 {
2107         while (skb->len > 0) {
2108                 u32 rx_cmd_a, rx_cmd_b, align_count, size;
2109                 struct sk_buff *ax_skb;
2110                 unsigned char *packet;
2111
2112                 memcpy(&rx_cmd_a, skb->data, sizeof(rx_cmd_a));
2113                 le32_to_cpus(&rx_cmd_a);
2114                 skb_pull(skb, 4);
2115
2116                 memcpy(&rx_cmd_b, skb->data, sizeof(rx_cmd_b));
2117                 le32_to_cpus(&rx_cmd_b);
2118                 skb_pull(skb, 4 + RXW_PADDING);
2119
2120                 packet = skb->data;
2121
2122                 /* get the packet length */
2123                 size = (rx_cmd_a & RX_CMD_A_LEN) - RXW_PADDING;
2124                 align_count = (4 - ((size + RXW_PADDING) % 4)) % 4;
2125
2126                 if (unlikely(rx_cmd_a & RX_CMD_A_RED)) {
2127                         netif_dbg(dev, rx_err, dev->net,
2128                                   "Error rx_cmd_a=0x%08x\n", rx_cmd_a);
2129                         dev->net->stats.rx_errors++;
2130                         dev->net->stats.rx_dropped++;
2131
2132                         if (rx_cmd_a & RX_CMD_A_FCS)
2133                                 dev->net->stats.rx_crc_errors++;
2134                         else if (rx_cmd_a & (RX_CMD_A_LONG | RX_CMD_A_RUNT))
2135                                 dev->net->stats.rx_frame_errors++;
2136                 } else {
2137                         /* ETH_FRAME_LEN + 4(CRC) + 2(COE) + 4(Vlan) */
2138                         if (unlikely(size > (ETH_FRAME_LEN + 12))) {
2139                                 netif_dbg(dev, rx_err, dev->net,
2140                                           "size err rx_cmd_a=0x%08x\n",
2141                                           rx_cmd_a);
2142                                 return 0;
2143                         }
2144
2145                         /* last frame in this batch */
2146                         if (skb->len == size) {
2147                                 smsc75xx_rx_csum_offload(dev, skb, rx_cmd_a,
2148                                         rx_cmd_b);
2149
2150                                 skb_trim(skb, skb->len - 4); /* remove fcs */
2151                                 skb->truesize = size + sizeof(struct sk_buff);
2152
2153                                 return 1;
2154                         }
2155
2156                         ax_skb = skb_clone(skb, GFP_ATOMIC);
2157                         if (unlikely(!ax_skb)) {
2158                                 netdev_warn(dev->net, "Error allocating skb\n");
2159                                 return 0;
2160                         }
2161
2162                         ax_skb->len = size;
2163                         ax_skb->data = packet;
2164                         skb_set_tail_pointer(ax_skb, size);
2165
2166                         smsc75xx_rx_csum_offload(dev, ax_skb, rx_cmd_a,
2167                                 rx_cmd_b);
2168
2169                         skb_trim(ax_skb, ax_skb->len - 4); /* remove fcs */
2170                         ax_skb->truesize = size + sizeof(struct sk_buff);
2171
2172                         usbnet_skb_return(dev, ax_skb);
2173                 }
2174
2175                 skb_pull(skb, size);
2176
2177                 /* padding bytes before the next frame starts */
2178                 if (skb->len)
2179                         skb_pull(skb, align_count);
2180         }
2181
2182         if (unlikely(skb->len < 0)) {
2183                 netdev_warn(dev->net, "invalid rx length<0 %d\n", skb->len);
2184                 return 0;
2185         }
2186
2187         return 1;
2188 }
2189
2190 static struct sk_buff *smsc75xx_tx_fixup(struct usbnet *dev,
2191                                          struct sk_buff *skb, gfp_t flags)
2192 {
2193         u32 tx_cmd_a, tx_cmd_b;
2194
2195         skb_linearize(skb);
2196
2197         if (skb_headroom(skb) < SMSC75XX_TX_OVERHEAD) {
2198                 struct sk_buff *skb2 =
2199                         skb_copy_expand(skb, SMSC75XX_TX_OVERHEAD, 0, flags);
2200                 dev_kfree_skb_any(skb);
2201                 skb = skb2;
2202                 if (!skb)
2203                         return NULL;
2204         }
2205
2206         tx_cmd_a = (u32)(skb->len & TX_CMD_A_LEN) | TX_CMD_A_FCS;
2207
2208         if (skb->ip_summed == CHECKSUM_PARTIAL)
2209                 tx_cmd_a |= TX_CMD_A_IPE | TX_CMD_A_TPE;
2210
2211         if (skb_is_gso(skb)) {
2212                 u16 mss = max(skb_shinfo(skb)->gso_size, TX_MSS_MIN);
2213                 tx_cmd_b = (mss << TX_CMD_B_MSS_SHIFT) & TX_CMD_B_MSS;
2214
2215                 tx_cmd_a |= TX_CMD_A_LSO;
2216         } else {
2217                 tx_cmd_b = 0;
2218         }
2219
2220         skb_push(skb, 4);
2221         cpu_to_le32s(&tx_cmd_b);
2222         memcpy(skb->data, &tx_cmd_b, 4);
2223
2224         skb_push(skb, 4);
2225         cpu_to_le32s(&tx_cmd_a);
2226         memcpy(skb->data, &tx_cmd_a, 4);
2227
2228         return skb;
2229 }
2230
2231 static int smsc75xx_manage_power(struct usbnet *dev, int on)
2232 {
2233         dev->intf->needs_remote_wakeup = on;
2234         return 0;
2235 }
2236
2237 static const struct driver_info smsc75xx_info = {
2238         .description    = "smsc75xx USB 2.0 Gigabit Ethernet",
2239         .bind           = smsc75xx_bind,
2240         .unbind         = smsc75xx_unbind,
2241         .link_reset     = smsc75xx_link_reset,
2242         .reset          = smsc75xx_reset,
2243         .rx_fixup       = smsc75xx_rx_fixup,
2244         .tx_fixup       = smsc75xx_tx_fixup,
2245         .status         = smsc75xx_status,
2246         .manage_power   = smsc75xx_manage_power,
2247         .flags          = FLAG_ETHER | FLAG_SEND_ZLP | FLAG_LINK_INTR,
2248 };
2249
2250 static const struct usb_device_id products[] = {
2251         {
2252                 /* SMSC7500 USB Gigabit Ethernet Device */
2253                 USB_DEVICE(USB_VENDOR_ID_SMSC, USB_PRODUCT_ID_LAN7500),
2254                 .driver_info = (unsigned long) &smsc75xx_info,
2255         },
2256         {
2257                 /* SMSC7500 USB Gigabit Ethernet Device */
2258                 USB_DEVICE(USB_VENDOR_ID_SMSC, USB_PRODUCT_ID_LAN7505),
2259                 .driver_info = (unsigned long) &smsc75xx_info,
2260         },
2261         { },            /* END */
2262 };
2263 MODULE_DEVICE_TABLE(usb, products);
2264
2265 static struct usb_driver smsc75xx_driver = {
2266         .name           = SMSC_CHIPNAME,
2267         .id_table       = products,
2268         .probe          = usbnet_probe,
2269         .suspend        = smsc75xx_suspend,
2270         .resume         = smsc75xx_resume,
2271         .reset_resume   = smsc75xx_resume,
2272         .disconnect     = usbnet_disconnect,
2273         .disable_hub_initiated_lpm = 1,
2274         .supports_autosuspend = 1,
2275 };
2276
2277 module_usb_driver(smsc75xx_driver);
2278
2279 MODULE_AUTHOR("Nancy Lin");
2280 MODULE_AUTHOR("Steve Glendinning <steve.glendinning@shawell.net>");
2281 MODULE_DESCRIPTION("SMSC75XX USB 2.0 Gigabit Ethernet Devices");
2282 MODULE_LICENSE("GPL");