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 SMSC75XX_INTERNAL_PHY_ID        (1)
  49 #define SMSC75XX_TX_OVERHEAD            (8)
  50 #define MAX_RX_FIFO_SIZE                (20 * 1024)
  51 #define MAX_TX_FIFO_SIZE                (12 * 1024)
  52 #define USB_VENDOR_ID_SMSC              (0x0424)
  53 #define USB_PRODUCT_ID_LAN7500          (0x7500)
  54 #define USB_PRODUCT_ID_LAN7505          (0x7505)
  55 #define RXW_PADDING                     2
  56 #define SUPPORTED_WAKE                  (WAKE_PHY | WAKE_UCAST | WAKE_BCAST | \
  57                                          WAKE_MCAST | WAKE_ARP | WAKE_MAGIC)
  58
  59 #define SUSPEND_SUSPEND0                (0x01)
  60 #define SUSPEND_SUSPEND1                (0x02)
  61 #define SUSPEND_SUSPEND2                (0x04)
  62 #define SUSPEND_SUSPEND3                (0x08)
  63 #define SUSPEND_ALLMODES                (SUSPEND_SUSPEND0 | SUSPEND_SUSPEND1 | \
  64                                          SUSPEND_SUSPEND2 | SUSPEND_SUSPEND3)
  65
  66 struct smsc75xx_priv {
  67         struct usbnet *dev;
  68         u32 rfe_ctl;
  69         u32 wolopts;
  70         u32 multicast_hash_table[DP_SEL_VHF_HASH_LEN];
  71         struct mutex dataport_mutex;
  72         spinlock_t rfe_ctl_lock;
  73         struct work_struct set_multicast;
  74         u8 suspend_flags;
  75 };
  76
  77 struct usb_context {
  78         struct usb_ctrlrequest req;
  79         struct usbnet *dev;
  80 };
  81
  82 static bool turbo_mode = true;
  83 module_param(turbo_mode, bool, 0644);
  84 MODULE_PARM_DESC(turbo_mode, "Enable multiple frames per Rx transaction");
  85
  86 static int __must_check __smsc75xx_read_reg(struct usbnet *dev, u32 index,
  87                                             u32 *data, int in_pm)
  88 {
  89         u32 buf;
  90         int ret;
  91         int (*fn)(struct usbnet *, u8, u8, u16, u16, void *, u16);
  92
  93         BUG_ON(!dev);
  94
  95         if (!in_pm)
  96                 fn = usbnet_read_cmd;
  97         else
  98                 fn = usbnet_read_cmd_nopm;
  99
 100         ret = fn(dev, USB_VENDOR_REQUEST_READ_REGISTER, USB_DIR_IN
 101                  | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 102                  0, index, &buf, 4);
 103         if (unlikely(ret < 0))
 104                 netdev_warn(dev->net, "Failed to read reg index 0x%08x: %d\n",
 105                             index, ret);
 106
 107         le32_to_cpus(&buf);
 108         *data = buf;
 109
 110         return ret;
 111 }
 112
 113 static int __must_check __smsc75xx_write_reg(struct usbnet *dev, u32 index,
 114                                              u32 data, int in_pm)
 115 {
 116         u32 buf;
 117         int ret;
 118         int (*fn)(struct usbnet *, u8, u8, u16, u16, const void *, u16);
 119
 120         BUG_ON(!dev);
 121
 122         if (!in_pm)
 123                 fn = usbnet_write_cmd;
 124         else
 125                 fn = usbnet_write_cmd_nopm;
 126
 127         buf = data;
 128         cpu_to_le32s(&buf);
 129
 130         ret = fn(dev, USB_VENDOR_REQUEST_WRITE_REGISTER, USB_DIR_OUT
 131                  | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 132                  0, index, &buf, 4);
 133         if (unlikely(ret < 0))
 134                 netdev_warn(dev->net, "Failed to write reg index 0x%08x: %d\n",
 135                             index, ret);
 136
 137         return ret;
 138 }
 139
 140 static int __must_check smsc75xx_read_reg_nopm(struct usbnet *dev, u32 index,
 141                                                u32 *data)
 142 {
 143         return __smsc75xx_read_reg(dev, index, data, 1);
 144 }
 145
 146 static int __must_check smsc75xx_write_reg_nopm(struct usbnet *dev, u32 index,
 147                                                 u32 data)
 148 {
 149         return __smsc75xx_write_reg(dev, index, data, 1);
 150 }
 151
 152 static int __must_check smsc75xx_read_reg(struct usbnet *dev, u32 index,
 153                                           u32 *data)
 154 {
 155         return __smsc75xx_read_reg(dev, index, data, 0);
 156 }
 157
 158 static int __must_check smsc75xx_write_reg(struct usbnet *dev, u32 index,
 159                                            u32 data)
 160 {
 161         return __smsc75xx_write_reg(dev, index, data, 0);
 162 }
 163
 164 /* Loop until the read is completed with timeout
 165  * called with phy_mutex held */
 166 static __must_check int __smsc75xx_phy_wait_not_busy(struct usbnet *dev,
 167                                                      int in_pm)
 168 {
 169         unsigned long start_time = jiffies;
 170         u32 val;
 171         int ret;
 172
 173         do {
 174                 ret = __smsc75xx_read_reg(dev, MII_ACCESS, &val, in_pm);
 175                 if (ret < 0) {
 176                         netdev_warn(dev->net, "Error reading MII_ACCESS\n");
 177                         return ret;
 178                 }
 179
 180                 if (!(val & MII_ACCESS_BUSY))
 181                         return 0;
 182         } while (!time_after(jiffies, start_time + HZ));
 183
 184         return -EIO;
 185 }
 186
 187 static int __smsc75xx_mdio_read(struct net_device *netdev, int phy_id, int idx,
 188                                 int in_pm)
 189 {
 190         struct usbnet *dev = netdev_priv(netdev);
 191         u32 val, addr;
 192         int ret;
 193
 194         mutex_lock(&dev->phy_mutex);
 195
 196         /* confirm MII not busy */
 197         ret = __smsc75xx_phy_wait_not_busy(dev, in_pm);
 198         if (ret < 0) {
 199                 netdev_warn(dev->net, "MII is busy in smsc75xx_mdio_read\n");
 200                 goto done;
 201         }
 202
 203         /* set the address, index & direction (read from PHY) */
 204         phy_id &= dev->mii.phy_id_mask;
 205         idx &= dev->mii.reg_num_mask;
 206         addr = ((phy_id << MII_ACCESS_PHY_ADDR_SHIFT) & MII_ACCESS_PHY_ADDR)
 207                 | ((idx << MII_ACCESS_REG_ADDR_SHIFT) & MII_ACCESS_REG_ADDR)
 208                 | MII_ACCESS_READ | MII_ACCESS_BUSY;
 209         ret = __smsc75xx_write_reg(dev, MII_ACCESS, addr, in_pm);
 210         if (ret < 0) {
 211                 netdev_warn(dev->net, "Error writing MII_ACCESS\n");
 212                 goto done;
 213         }
 214
 215         ret = __smsc75xx_phy_wait_not_busy(dev, in_pm);
 216         if (ret < 0) {
 217                 netdev_warn(dev->net, "Timed out reading MII reg %02X\n", idx);
 218                 goto done;
 219         }
 220
 221         ret = __smsc75xx_read_reg(dev, MII_DATA, &val, in_pm);
 222         if (ret < 0) {
 223                 netdev_warn(dev->net, "Error reading MII_DATA\n");
 224                 goto done;
 225         }
 226
 227         ret = (u16)(val & 0xFFFF);
 228
 229 done:
 230         mutex_unlock(&dev->phy_mutex);
 231         return ret;
 232 }
 233
 234 static void __smsc75xx_mdio_write(struct net_device *netdev, int phy_id,
 235                                   int idx, int regval, int in_pm)
 236 {
 237         struct usbnet *dev = netdev_priv(netdev);
 238         u32 val, addr;
 239         int ret;
 240
 241         mutex_lock(&dev->phy_mutex);
 242
 243         /* confirm MII not busy */
 244         ret = __smsc75xx_phy_wait_not_busy(dev, in_pm);
 245         if (ret < 0) {
 246                 netdev_warn(dev->net, "MII is busy in smsc75xx_mdio_write\n");
 247                 goto done;
 248         }
 249
 250         val = regval;
 251         ret = __smsc75xx_write_reg(dev, MII_DATA, val, in_pm);
 252         if (ret < 0) {
 253                 netdev_warn(dev->net, "Error writing MII_DATA\n");
 254                 goto done;
 255         }
 256
 257         /* set the address, index & direction (write to PHY) */
 258         phy_id &= dev->mii.phy_id_mask;
 259         idx &= dev->mii.reg_num_mask;
 260         addr = ((phy_id << MII_ACCESS_PHY_ADDR_SHIFT) & MII_ACCESS_PHY_ADDR)
 261                 | ((idx << MII_ACCESS_REG_ADDR_SHIFT) & MII_ACCESS_REG_ADDR)
 262                 | MII_ACCESS_WRITE | MII_ACCESS_BUSY;
 263         ret = __smsc75xx_write_reg(dev, MII_ACCESS, addr, in_pm);
 264         if (ret < 0) {
 265                 netdev_warn(dev->net, "Error writing MII_ACCESS\n");
 266                 goto done;
 267         }
 268
 269         ret = __smsc75xx_phy_wait_not_busy(dev, in_pm);
 270         if (ret < 0) {
 271                 netdev_warn(dev->net, "Timed out writing MII reg %02X\n", idx);
 272                 goto done;
 273         }
 274
 275 done:
 276         mutex_unlock(&dev->phy_mutex);
 277 }
 278
 279 static int smsc75xx_mdio_read_nopm(struct net_device *netdev, int phy_id,
 280                                    int idx)
 281 {
 282         return __smsc75xx_mdio_read(netdev, phy_id, idx, 1);
 283 }
 284
 285 static void smsc75xx_mdio_write_nopm(struct net_device *netdev, int phy_id,
 286                                      int idx, int regval)
 287 {
 288         __smsc75xx_mdio_write(netdev, phy_id, idx, regval, 1);
 289 }
 290
 291 static int smsc75xx_mdio_read(struct net_device *netdev, int phy_id, int idx)
 292 {
 293         return __smsc75xx_mdio_read(netdev, phy_id, idx, 0);
 294 }
 295
 296 static void smsc75xx_mdio_write(struct net_device *netdev, int phy_id, int idx,
 297                                 int regval)
 298 {
 299         __smsc75xx_mdio_write(netdev, phy_id, idx, regval, 0);
 300 }
 301
 302 static int smsc75xx_wait_eeprom(struct usbnet *dev)
 303 {
 304         unsigned long start_time = jiffies;
 305         u32 val;
 306         int ret;
 307
 308         do {
 309                 ret = smsc75xx_read_reg(dev, E2P_CMD, &val);
 310                 if (ret < 0) {
 311                         netdev_warn(dev->net, "Error reading E2P_CMD\n");
 312                         return ret;
 313                 }
 314
 315                 if (!(val & E2P_CMD_BUSY) || (val & E2P_CMD_TIMEOUT))
 316                         break;
 317                 udelay(40);
 318         } while (!time_after(jiffies, start_time + HZ));
 319
 320         if (val & (E2P_CMD_TIMEOUT | E2P_CMD_BUSY)) {
 321                 netdev_warn(dev->net, "EEPROM read operation timeout\n");
 322                 return -EIO;
 323         }
 324
 325         return 0;
 326 }
 327
 328 static int smsc75xx_eeprom_confirm_not_busy(struct usbnet *dev)
 329 {
 330         unsigned long start_time = jiffies;
 331         u32 val;
 332         int ret;
 333
 334         do {
 335                 ret = smsc75xx_read_reg(dev, E2P_CMD, &val);
 336                 if (ret < 0) {
 337                         netdev_warn(dev->net, "Error reading E2P_CMD\n");
 338                         return ret;
 339                 }
 340
 341                 if (!(val & E2P_CMD_BUSY))
 342                         return 0;
 343
 344                 udelay(40);
 345         } while (!time_after(jiffies, start_time + HZ));
 346
 347         netdev_warn(dev->net, "EEPROM is busy\n");
 348         return -EIO;
 349 }
 350
 351 static int smsc75xx_read_eeprom(struct usbnet *dev, u32 offset, u32 length,
 352                                 u8 *data)
 353 {
 354         u32 val;
 355         int i, ret;
 356
 357         BUG_ON(!dev);
 358         BUG_ON(!data);
 359
 360         ret = smsc75xx_eeprom_confirm_not_busy(dev);
 361         if (ret)
 362                 return ret;
 363
 364         for (i = 0; i < length; i++) {
 365                 val = E2P_CMD_BUSY | E2P_CMD_READ | (offset & E2P_CMD_ADDR);
 366                 ret = smsc75xx_write_reg(dev, E2P_CMD, val);
 367                 if (ret < 0) {
 368                         netdev_warn(dev->net, "Error writing E2P_CMD\n");
 369                         return ret;
 370                 }
 371
 372                 ret = smsc75xx_wait_eeprom(dev);
 373                 if (ret < 0)
 374                         return ret;
 375
 376                 ret = smsc75xx_read_reg(dev, E2P_DATA, &val);
 377                 if (ret < 0) {
 378                         netdev_warn(dev->net, "Error reading E2P_DATA\n");
 379                         return ret;
 380                 }
 381
 382                 data[i] = val & 0xFF;
 383                 offset++;
 384         }
 385
 386         return 0;
 387 }
 388
 389 static int smsc75xx_write_eeprom(struct usbnet *dev, u32 offset, u32 length,
 390                                  u8 *data)
 391 {
 392         u32 val;
 393         int i, ret;
 394
 395         BUG_ON(!dev);
 396         BUG_ON(!data);
 397
 398         ret = smsc75xx_eeprom_confirm_not_busy(dev);
 399         if (ret)
 400                 return ret;
 401
 402         /* Issue write/erase enable command */
 403         val = E2P_CMD_BUSY | E2P_CMD_EWEN;
 404         ret = smsc75xx_write_reg(dev, E2P_CMD, val);
 405         if (ret < 0) {
 406                 netdev_warn(dev->net, "Error writing E2P_CMD\n");
 407                 return ret;
 408         }
 409
 410         ret = smsc75xx_wait_eeprom(dev);
 411         if (ret < 0)
 412                 return ret;
 413
 414         for (i = 0; i < length; i++) {
 415
 416                 /* Fill data register */
 417                 val = data[i];
 418                 ret = smsc75xx_write_reg(dev, E2P_DATA, val);
 419                 if (ret < 0) {
 420                         netdev_warn(dev->net, "Error writing E2P_DATA\n");
 421                         return ret;
 422                 }
 423
 424                 /* Send "write" command */
 425                 val = E2P_CMD_BUSY | E2P_CMD_WRITE | (offset & E2P_CMD_ADDR);
 426                 ret = smsc75xx_write_reg(dev, E2P_CMD, val);
 427                 if (ret < 0) {
 428                         netdev_warn(dev->net, "Error writing E2P_CMD\n");
 429                         return ret;
 430                 }
 431
 432                 ret = smsc75xx_wait_eeprom(dev);
 433                 if (ret < 0)
 434                         return ret;
 435
 436                 offset++;
 437         }
 438
 439         return 0;
 440 }
 441
 442 static int smsc75xx_dataport_wait_not_busy(struct usbnet *dev)
 443 {
 444         int i, ret;
 445
 446         for (i = 0; i < 100; i++) {
 447                 u32 dp_sel;
 448                 ret = smsc75xx_read_reg(dev, DP_SEL, &dp_sel);
 449                 if (ret < 0) {
 450                         netdev_warn(dev->net, "Error reading DP_SEL\n");
 451                         return ret;
 452                 }
 453
 454                 if (dp_sel & DP_SEL_DPRDY)
 455                         return 0;
 456
 457                 udelay(40);
 458         }
 459
 460         netdev_warn(dev->net, "smsc75xx_dataport_wait_not_busy timed out\n");
 461
 462         return -EIO;
 463 }
 464
 465 static int smsc75xx_dataport_write(struct usbnet *dev, u32 ram_select, u32 addr,
 466                                    u32 length, u32 *buf)
 467 {
 468         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 469         u32 dp_sel;
 470         int i, ret;
 471
 472         mutex_lock(&pdata->dataport_mutex);
 473
 474         ret = smsc75xx_dataport_wait_not_busy(dev);
 475         if (ret < 0) {
 476                 netdev_warn(dev->net, "smsc75xx_dataport_write busy on entry\n");
 477                 goto done;
 478         }
 479
 480         ret = smsc75xx_read_reg(dev, DP_SEL, &dp_sel);
 481         if (ret < 0) {
 482                 netdev_warn(dev->net, "Error reading DP_SEL\n");
 483                 goto done;
 484         }
 485
 486         dp_sel &= ~DP_SEL_RSEL;
 487         dp_sel |= ram_select;
 488         ret = smsc75xx_write_reg(dev, DP_SEL, dp_sel);
 489         if (ret < 0) {
 490                 netdev_warn(dev->net, "Error writing DP_SEL\n");
 491                 goto done;
 492         }
 493
 494         for (i = 0; i < length; i++) {
 495                 ret = smsc75xx_write_reg(dev, DP_ADDR, addr + i);
 496                 if (ret < 0) {
 497                         netdev_warn(dev->net, "Error writing DP_ADDR\n");
 498                         goto done;
 499                 }
 500
 501                 ret = smsc75xx_write_reg(dev, DP_DATA, buf[i]);
 502                 if (ret < 0) {
 503                         netdev_warn(dev->net, "Error writing DP_DATA\n");
 504                         goto done;
 505                 }
 506
 507                 ret = smsc75xx_write_reg(dev, DP_CMD, DP_CMD_WRITE);
 508                 if (ret < 0) {
 509                         netdev_warn(dev->net, "Error writing DP_CMD\n");
 510                         goto done;
 511                 }
 512
 513                 ret = smsc75xx_dataport_wait_not_busy(dev);
 514                 if (ret < 0) {
 515                         netdev_warn(dev->net, "smsc75xx_dataport_write timeout\n");
 516                         goto done;
 517                 }
 518         }
 519
 520 done:
 521         mutex_unlock(&pdata->dataport_mutex);
 522         return ret;
 523 }
 524
 525 /* returns hash bit number for given MAC address */
 526 static u32 smsc75xx_hash(char addr[ETH_ALEN])
 527 {
 528         return (ether_crc(ETH_ALEN, addr) >> 23) & 0x1ff;
 529 }
 530
 531 static void smsc75xx_deferred_multicast_write(struct work_struct *param)
 532 {
 533         struct smsc75xx_priv *pdata =
 534                 container_of(param, struct smsc75xx_priv, set_multicast);
 535         struct usbnet *dev = pdata->dev;
 536         int ret;
 537
 538         netif_dbg(dev, drv, dev->net, "deferred multicast write 0x%08x\n",
 539                   pdata->rfe_ctl);
 540
 541         smsc75xx_dataport_write(dev, DP_SEL_VHF, DP_SEL_VHF_VLAN_LEN,
 542                 DP_SEL_VHF_HASH_LEN, pdata->multicast_hash_table);
 543
 544         ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
 545         if (ret < 0)
 546                 netdev_warn(dev->net, "Error writing RFE_CRL\n");
 547 }
 548
 549 static void smsc75xx_set_multicast(struct net_device *netdev)
 550 {
 551         struct usbnet *dev = netdev_priv(netdev);
 552         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 553         unsigned long flags;
 554         int i;
 555
 556         spin_lock_irqsave(&pdata->rfe_ctl_lock, flags);
 557
 558         pdata->rfe_ctl &=
 559                 ~(RFE_CTL_AU | RFE_CTL_AM | RFE_CTL_DPF | RFE_CTL_MHF);
 560         pdata->rfe_ctl |= RFE_CTL_AB;
 561
 562         for (i = 0; i < DP_SEL_VHF_HASH_LEN; i++)
 563                 pdata->multicast_hash_table[i] = 0;
 564
 565         if (dev->net->flags & IFF_PROMISC) {
 566                 netif_dbg(dev, drv, dev->net, "promiscuous mode enabled\n");
 567                 pdata->rfe_ctl |= RFE_CTL_AM | RFE_CTL_AU;
 568         } else if (dev->net->flags & IFF_ALLMULTI) {
 569                 netif_dbg(dev, drv, dev->net, "receive all multicast enabled\n");
 570                 pdata->rfe_ctl |= RFE_CTL_AM | RFE_CTL_DPF;
 571         } else if (!netdev_mc_empty(dev->net)) {
 572                 struct netdev_hw_addr *ha;
 573
 574                 netif_dbg(dev, drv, dev->net, "receive multicast hash filter\n");
 575
 576                 pdata->rfe_ctl |= RFE_CTL_MHF | RFE_CTL_DPF;
 577
 578                 netdev_for_each_mc_addr(ha, netdev) {
 579                         u32 bitnum = smsc75xx_hash(ha->addr);
 580                         pdata->multicast_hash_table[bitnum / 32] |=
 581                                 (1 << (bitnum % 32));
 582                 }
 583         } else {
 584                 netif_dbg(dev, drv, dev->net, "receive own packets only\n");
 585                 pdata->rfe_ctl |= RFE_CTL_DPF;
 586         }
 587
 588         spin_unlock_irqrestore(&pdata->rfe_ctl_lock, flags);
 589
 590         /* defer register writes to a sleepable context */
 591         schedule_work(&pdata->set_multicast);
 592 }
 593
 594 static int smsc75xx_update_flowcontrol(struct usbnet *dev, u8 duplex,
 595                                             u16 lcladv, u16 rmtadv)
 596 {
 597         u32 flow = 0, fct_flow = 0;
 598         int ret;
 599
 600         if (duplex == DUPLEX_FULL) {
 601                 u8 cap = mii_resolve_flowctrl_fdx(lcladv, rmtadv);
 602
 603                 if (cap & FLOW_CTRL_TX) {
 604                         flow = (FLOW_TX_FCEN | 0xFFFF);
 605                         /* set fct_flow thresholds to 20% and 80% */
 606                         fct_flow = (8 << 8) | 32;
 607                 }
 608
 609                 if (cap & FLOW_CTRL_RX)
 610                         flow |= FLOW_RX_FCEN;
 611
 612                 netif_dbg(dev, link, dev->net, "rx pause %s, tx pause %s\n",
 613                           (cap & FLOW_CTRL_RX ? "enabled" : "disabled"),
 614                           (cap & FLOW_CTRL_TX ? "enabled" : "disabled"));
 615         } else {
 616                 netif_dbg(dev, link, dev->net, "half duplex\n");
 617         }
 618
 619         ret = smsc75xx_write_reg(dev, FLOW, flow);
 620         if (ret < 0) {
 621                 netdev_warn(dev->net, "Error writing FLOW\n");
 622                 return ret;
 623         }
 624
 625         ret = smsc75xx_write_reg(dev, FCT_FLOW, fct_flow);
 626         if (ret < 0) {
 627                 netdev_warn(dev->net, "Error writing FCT_FLOW\n");
 628                 return ret;
 629         }
 630
 631         return 0;
 632 }
 633
 634 static int smsc75xx_link_reset(struct usbnet *dev)
 635 {
 636         struct mii_if_info *mii = &dev->mii;
 637         struct ethtool_cmd ecmd = { .cmd = ETHTOOL_GSET };
 638         u16 lcladv, rmtadv;
 639         int ret;
 640
 641         /* write to clear phy interrupt status */
 642         smsc75xx_mdio_write(dev->net, mii->phy_id, PHY_INT_SRC,
 643                 PHY_INT_SRC_CLEAR_ALL);
 644
 645         ret = smsc75xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL);
 646         if (ret < 0) {
 647                 netdev_warn(dev->net, "Error writing INT_STS\n");
 648                 return ret;
 649         }
 650
 651         mii_check_media(mii, 1, 1);
 652         mii_ethtool_gset(&dev->mii, &ecmd);
 653         lcladv = smsc75xx_mdio_read(dev->net, mii->phy_id, MII_ADVERTISE);
 654         rmtadv = smsc75xx_mdio_read(dev->net, mii->phy_id, MII_LPA);
 655
 656         netif_dbg(dev, link, dev->net, "speed: %u duplex: %d lcladv: %04x rmtadv: %04x\n",
 657                   ethtool_cmd_speed(&ecmd), ecmd.duplex, lcladv, rmtadv);
 658
 659         return smsc75xx_update_flowcontrol(dev, ecmd.duplex, lcladv, rmtadv);
 660 }
 661
 662 static void smsc75xx_status(struct usbnet *dev, struct urb *urb)
 663 {
 664         u32 intdata;
 665
 666         if (urb->actual_length != 4) {
 667                 netdev_warn(dev->net, "unexpected urb length %d\n",
 668                             urb->actual_length);
 669                 return;
 670         }
 671
 672         memcpy(&intdata, urb->transfer_buffer, 4);
 673         le32_to_cpus(&intdata);
 674
 675         netif_dbg(dev, link, dev->net, "intdata: 0x%08X\n", intdata);
 676
 677         if (intdata & INT_ENP_PHY_INT)
 678                 usbnet_defer_kevent(dev, EVENT_LINK_RESET);
 679         else
 680                 netdev_warn(dev->net, "unexpected interrupt, intdata=0x%08X\n",
 681                             intdata);
 682 }
 683
 684 static int smsc75xx_ethtool_get_eeprom_len(struct net_device *net)
 685 {
 686         return MAX_EEPROM_SIZE;
 687 }
 688
 689 static int smsc75xx_ethtool_get_eeprom(struct net_device *netdev,
 690                                        struct ethtool_eeprom *ee, u8 *data)
 691 {
 692         struct usbnet *dev = netdev_priv(netdev);
 693
 694         ee->magic = LAN75XX_EEPROM_MAGIC;
 695
 696         return smsc75xx_read_eeprom(dev, ee->offset, ee->len, data);
 697 }
 698
 699 static int smsc75xx_ethtool_set_eeprom(struct net_device *netdev,
 700                                        struct ethtool_eeprom *ee, u8 *data)
 701 {
 702         struct usbnet *dev = netdev_priv(netdev);
 703
 704         if (ee->magic != LAN75XX_EEPROM_MAGIC) {
 705                 netdev_warn(dev->net, "EEPROM: magic value mismatch: 0x%x\n",
 706                             ee->magic);
 707                 return -EINVAL;
 708         }
 709
 710         return smsc75xx_write_eeprom(dev, ee->offset, ee->len, data);
 711 }
 712
 713 static void smsc75xx_ethtool_get_wol(struct net_device *net,
 714                                      struct ethtool_wolinfo *wolinfo)
 715 {
 716         struct usbnet *dev = netdev_priv(net);
 717         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 718
 719         wolinfo->supported = SUPPORTED_WAKE;
 720         wolinfo->wolopts = pdata->wolopts;
 721 }
 722
 723 static int smsc75xx_ethtool_set_wol(struct net_device *net,
 724                                     struct ethtool_wolinfo *wolinfo)
 725 {
 726         struct usbnet *dev = netdev_priv(net);
 727         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 728         int ret;
 729
 730         pdata->wolopts = wolinfo->wolopts & SUPPORTED_WAKE;
 731
 732         ret = device_set_wakeup_enable(&dev->udev->dev, pdata->wolopts);
 733         if (ret < 0)
 734                 netdev_warn(dev->net, "device_set_wakeup_enable error %d\n", ret);
 735
 736         return ret;
 737 }
 738
 739 static const struct ethtool_ops smsc75xx_ethtool_ops = {
 740         .get_link       = usbnet_get_link,
 741         .nway_reset     = usbnet_nway_reset,
 742         .get_drvinfo    = usbnet_get_drvinfo,
 743         .get_msglevel   = usbnet_get_msglevel,
 744         .set_msglevel   = usbnet_set_msglevel,
 745         .get_settings   = usbnet_get_settings,
 746         .set_settings   = usbnet_set_settings,
 747         .get_eeprom_len = smsc75xx_ethtool_get_eeprom_len,
 748         .get_eeprom     = smsc75xx_ethtool_get_eeprom,
 749         .set_eeprom     = smsc75xx_ethtool_set_eeprom,
 750         .get_wol        = smsc75xx_ethtool_get_wol,
 751         .set_wol        = smsc75xx_ethtool_set_wol,
 752 };
 753
 754 static int smsc75xx_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
 755 {
 756         struct usbnet *dev = netdev_priv(netdev);
 757
 758         if (!netif_running(netdev))
 759                 return -EINVAL;
 760
 761         return generic_mii_ioctl(&dev->mii, if_mii(rq), cmd, NULL);
 762 }
 763
 764 static void smsc75xx_init_mac_address(struct usbnet *dev)
 765 {
 766         /* try reading mac address from EEPROM */
 767         if (smsc75xx_read_eeprom(dev, EEPROM_MAC_OFFSET, ETH_ALEN,
 768                         dev->net->dev_addr) == 0) {
 769                 if (is_valid_ether_addr(dev->net->dev_addr)) {
 770                         /* eeprom values are valid so use them */
 771                         netif_dbg(dev, ifup, dev->net,
 772                                   "MAC address read from EEPROM\n");
 773                         return;
 774                 }
 775         }
 776
 777         /* no eeprom, or eeprom values are invalid. generate random MAC */
 778         eth_hw_addr_random(dev->net);
 779         netif_dbg(dev, ifup, dev->net, "MAC address set to eth_random_addr\n");
 780 }
 781
 782 static int smsc75xx_set_mac_address(struct usbnet *dev)
 783 {
 784         u32 addr_lo = dev->net->dev_addr[0] | dev->net->dev_addr[1] << 8 |
 785                 dev->net->dev_addr[2] << 16 | dev->net->dev_addr[3] << 24;
 786         u32 addr_hi = dev->net->dev_addr[4] | dev->net->dev_addr[5] << 8;
 787
 788         int ret = smsc75xx_write_reg(dev, RX_ADDRH, addr_hi);
 789         if (ret < 0) {
 790                 netdev_warn(dev->net, "Failed to write RX_ADDRH: %d\n", ret);
 791                 return ret;
 792         }
 793
 794         ret = smsc75xx_write_reg(dev, RX_ADDRL, addr_lo);
 795         if (ret < 0) {
 796                 netdev_warn(dev->net, "Failed to write RX_ADDRL: %d\n", ret);
 797                 return ret;
 798         }
 799
 800         addr_hi |= ADDR_FILTX_FB_VALID;
 801         ret = smsc75xx_write_reg(dev, ADDR_FILTX, addr_hi);
 802         if (ret < 0) {
 803                 netdev_warn(dev->net, "Failed to write ADDR_FILTX: %d\n", ret);
 804                 return ret;
 805         }
 806
 807         ret = smsc75xx_write_reg(dev, ADDR_FILTX + 4, addr_lo);
 808         if (ret < 0)
 809                 netdev_warn(dev->net, "Failed to write ADDR_FILTX+4: %d\n", ret);
 810
 811         return ret;
 812 }
 813
 814 static int smsc75xx_phy_initialize(struct usbnet *dev)
 815 {
 816         int bmcr, ret, timeout = 0;
 817
 818         /* Initialize MII structure */
 819         dev->mii.dev = dev->net;
 820         dev->mii.mdio_read = smsc75xx_mdio_read;
 821         dev->mii.mdio_write = smsc75xx_mdio_write;
 822         dev->mii.phy_id_mask = 0x1f;
 823         dev->mii.reg_num_mask = 0x1f;
 824         dev->mii.supports_gmii = 1;
 825         dev->mii.phy_id = SMSC75XX_INTERNAL_PHY_ID;
 826
 827         /* reset phy and wait for reset to complete */
 828         smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_BMCR, BMCR_RESET);
 829
 830         do {
 831                 msleep(10);
 832                 bmcr = smsc75xx_mdio_read(dev->net, dev->mii.phy_id, MII_BMCR);
 833                 if (bmcr < 0) {
 834                         netdev_warn(dev->net, "Error reading MII_BMCR\n");
 835                         return bmcr;
 836                 }
 837                 timeout++;
 838         } while ((bmcr & BMCR_RESET) && (timeout < 100));
 839
 840         if (timeout >= 100) {
 841                 netdev_warn(dev->net, "timeout on PHY Reset\n");
 842                 return -EIO;
 843         }
 844
 845         smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_ADVERTISE,
 846                 ADVERTISE_ALL | ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP |
 847                 ADVERTISE_PAUSE_ASYM);
 848         smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_CTRL1000,
 849                 ADVERTISE_1000FULL);
 850
 851         /* read and write to clear phy interrupt status */
 852         ret = smsc75xx_mdio_read(dev->net, dev->mii.phy_id, PHY_INT_SRC);
 853         if (ret < 0) {
 854                 netdev_warn(dev->net, "Error reading PHY_INT_SRC\n");
 855                 return ret;
 856         }
 857
 858         smsc75xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_SRC, 0xffff);
 859
 860         smsc75xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_MASK,
 861                 PHY_INT_MASK_DEFAULT);
 862         mii_nway_restart(&dev->mii);
 863
 864         netif_dbg(dev, ifup, dev->net, "phy initialised successfully\n");
 865         return 0;
 866 }
 867
 868 static int smsc75xx_set_rx_max_frame_length(struct usbnet *dev, int size)
 869 {
 870         int ret = 0;
 871         u32 buf;
 872         bool rxenabled;
 873
 874         ret = smsc75xx_read_reg(dev, MAC_RX, &buf);
 875         if (ret < 0) {
 876                 netdev_warn(dev->net, "Failed to read MAC_RX: %d\n", ret);
 877                 return ret;
 878         }
 879
 880         rxenabled = ((buf & MAC_RX_RXEN) != 0);
 881
 882         if (rxenabled) {
 883                 buf &= ~MAC_RX_RXEN;
 884                 ret = smsc75xx_write_reg(dev, MAC_RX, buf);
 885                 if (ret < 0) {
 886                         netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
 887                         return ret;
 888                 }
 889         }
 890
 891         /* add 4 to size for FCS */
 892         buf &= ~MAC_RX_MAX_SIZE;
 893         buf |= (((size + 4) << MAC_RX_MAX_SIZE_SHIFT) & MAC_RX_MAX_SIZE);
 894
 895         ret = smsc75xx_write_reg(dev, MAC_RX, buf);
 896         if (ret < 0) {
 897                 netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
 898                 return ret;
 899         }
 900
 901         if (rxenabled) {
 902                 buf |= MAC_RX_RXEN;
 903                 ret = smsc75xx_write_reg(dev, MAC_RX, buf);
 904                 if (ret < 0) {
 905                         netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
 906                         return ret;
 907                 }
 908         }
 909
 910         return 0;
 911 }
 912
 913 static int smsc75xx_change_mtu(struct net_device *netdev, int new_mtu)
 914 {
 915         struct usbnet *dev = netdev_priv(netdev);
 916         int ret;
 917
 918         if (new_mtu > MAX_SINGLE_PACKET_SIZE)
 919                 return -EINVAL;
 920
 921         ret = smsc75xx_set_rx_max_frame_length(dev, new_mtu + ETH_HLEN);
 922         if (ret < 0) {
 923                 netdev_warn(dev->net, "Failed to set mac rx frame length\n");
 924                 return ret;
 925         }
 926
 927         return usbnet_change_mtu(netdev, new_mtu);
 928 }
 929
 930 /* Enable or disable Rx checksum offload engine */
 931 static int smsc75xx_set_features(struct net_device *netdev,
 932         netdev_features_t features)
 933 {
 934         struct usbnet *dev = netdev_priv(netdev);
 935         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 936         unsigned long flags;
 937         int ret;
 938
 939         spin_lock_irqsave(&pdata->rfe_ctl_lock, flags);
 940
 941         if (features & NETIF_F_RXCSUM)
 942                 pdata->rfe_ctl |= RFE_CTL_TCPUDP_CKM | RFE_CTL_IP_CKM;
 943         else
 944                 pdata->rfe_ctl &= ~(RFE_CTL_TCPUDP_CKM | RFE_CTL_IP_CKM);
 945
 946         spin_unlock_irqrestore(&pdata->rfe_ctl_lock, flags);
 947         /* it's racing here! */
 948
 949         ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
 950         if (ret < 0)
 951                 netdev_warn(dev->net, "Error writing RFE_CTL\n");
 952
 953         return ret;
 954 }
 955
 956 static int smsc75xx_wait_ready(struct usbnet *dev, int in_pm)
 957 {
 958         int timeout = 0;
 959
 960         do {
 961                 u32 buf;
 962                 int ret;
 963
 964                 ret = __smsc75xx_read_reg(dev, PMT_CTL, &buf, in_pm);
 965
 966                 if (ret < 0) {
 967                         netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret);
 968                         return ret;
 969                 }
 970
 971                 if (buf & PMT_CTL_DEV_RDY)
 972                         return 0;
 973
 974                 msleep(10);
 975                 timeout++;
 976         } while (timeout < 100);
 977
 978         netdev_warn(dev->net, "timeout waiting for device ready\n");
 979         return -EIO;
 980 }
 981
 982 static int smsc75xx_reset(struct usbnet *dev)
 983 {
 984         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 985         u32 buf;
 986         int ret = 0, timeout;
 987
 988         netif_dbg(dev, ifup, dev->net, "entering smsc75xx_reset\n");
 989
 990         ret = smsc75xx_wait_ready(dev, 0);
 991         if (ret < 0) {
 992                 netdev_warn(dev->net, "device not ready in smsc75xx_reset\n");
 993                 return ret;
 994         }
 995
 996         ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
 997         if (ret < 0) {
 998                 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
 999                 return ret;
1000         }
1001
1002         buf |= HW_CFG_LRST;
1003
1004         ret = smsc75xx_write_reg(dev, HW_CFG, buf);
1005         if (ret < 0) {
1006                 netdev_warn(dev->net, "Failed to write HW_CFG: %d\n", ret);
1007                 return ret;
1008         }
1009
1010         timeout = 0;
1011         do {
1012                 msleep(10);
1013                 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1014                 if (ret < 0) {
1015                         netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1016                         return ret;
1017                 }
1018                 timeout++;
1019         } while ((buf & HW_CFG_LRST) && (timeout < 100));
1020
1021         if (timeout >= 100) {
1022                 netdev_warn(dev->net, "timeout on completion of Lite Reset\n");
1023                 return -EIO;
1024         }
1025
1026         netif_dbg(dev, ifup, dev->net, "Lite reset complete, resetting PHY\n");
1027
1028         ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
1029         if (ret < 0) {
1030                 netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret);
1031                 return ret;
1032         }
1033
1034         buf |= PMT_CTL_PHY_RST;
1035
1036         ret = smsc75xx_write_reg(dev, PMT_CTL, buf);
1037         if (ret < 0) {
1038                 netdev_warn(dev->net, "Failed to write PMT_CTL: %d\n", ret);
1039                 return ret;
1040         }
1041
1042         timeout = 0;
1043         do {
1044                 msleep(10);
1045                 ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
1046                 if (ret < 0) {
1047                         netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret);
1048                         return ret;
1049                 }
1050                 timeout++;
1051         } while ((buf & PMT_CTL_PHY_RST) && (timeout < 100));
1052
1053         if (timeout >= 100) {
1054                 netdev_warn(dev->net, "timeout waiting for PHY Reset\n");
1055                 return -EIO;
1056         }
1057
1058         netif_dbg(dev, ifup, dev->net, "PHY reset complete\n");
1059
1060         ret = smsc75xx_set_mac_address(dev);
1061         if (ret < 0) {
1062                 netdev_warn(dev->net, "Failed to set mac address\n");
1063                 return ret;
1064         }
1065
1066         netif_dbg(dev, ifup, dev->net, "MAC Address: %pM\n",
1067                   dev->net->dev_addr);
1068
1069         ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1070         if (ret < 0) {
1071                 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1072                 return ret;
1073         }
1074
1075         netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG : 0x%08x\n",
1076                   buf);
1077
1078         buf |= HW_CFG_BIR;
1079
1080         ret = smsc75xx_write_reg(dev, HW_CFG, buf);
1081         if (ret < 0) {
1082                 netdev_warn(dev->net,  "Failed to write HW_CFG: %d\n", ret);
1083                 return ret;
1084         }
1085
1086         ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1087         if (ret < 0) {
1088                 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1089                 return ret;
1090         }
1091
1092         netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG after writing HW_CFG_BIR: 0x%08x\n",
1093                   buf);
1094
1095         if (!turbo_mode) {
1096                 buf = 0;
1097                 dev->rx_urb_size = MAX_SINGLE_PACKET_SIZE;
1098         } else if (dev->udev->speed == USB_SPEED_HIGH) {
1099                 buf = DEFAULT_HS_BURST_CAP_SIZE / HS_USB_PKT_SIZE;
1100                 dev->rx_urb_size = DEFAULT_HS_BURST_CAP_SIZE;
1101         } else {
1102                 buf = DEFAULT_FS_BURST_CAP_SIZE / FS_USB_PKT_SIZE;
1103                 dev->rx_urb_size = DEFAULT_FS_BURST_CAP_SIZE;
1104         }
1105
1106         netif_dbg(dev, ifup, dev->net, "rx_urb_size=%ld\n",
1107                   (ulong)dev->rx_urb_size);
1108
1109         ret = smsc75xx_write_reg(dev, BURST_CAP, buf);
1110         if (ret < 0) {
1111                 netdev_warn(dev->net, "Failed to write BURST_CAP: %d\n", ret);
1112                 return ret;
1113         }
1114
1115         ret = smsc75xx_read_reg(dev, BURST_CAP, &buf);
1116         if (ret < 0) {
1117                 netdev_warn(dev->net, "Failed to read BURST_CAP: %d\n", ret);
1118                 return ret;
1119         }
1120
1121         netif_dbg(dev, ifup, dev->net,
1122                   "Read Value from BURST_CAP after writing: 0x%08x\n", buf);
1123
1124         ret = smsc75xx_write_reg(dev, BULK_IN_DLY, DEFAULT_BULK_IN_DELAY);
1125         if (ret < 0) {
1126                 netdev_warn(dev->net, "Failed to write BULK_IN_DLY: %d\n", ret);
1127                 return ret;
1128         }
1129
1130         ret = smsc75xx_read_reg(dev, BULK_IN_DLY, &buf);
1131         if (ret < 0) {
1132                 netdev_warn(dev->net, "Failed to read BULK_IN_DLY: %d\n", ret);
1133                 return ret;
1134         }
1135
1136         netif_dbg(dev, ifup, dev->net,
1137                   "Read Value from BULK_IN_DLY after writing: 0x%08x\n", buf);
1138
1139         if (turbo_mode) {
1140                 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1141                 if (ret < 0) {
1142                         netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1143                         return ret;
1144                 }
1145
1146                 netif_dbg(dev, ifup, dev->net, "HW_CFG: 0x%08x\n", buf);
1147
1148                 buf |= (HW_CFG_MEF | HW_CFG_BCE);
1149
1150                 ret = smsc75xx_write_reg(dev, HW_CFG, buf);
1151                 if (ret < 0) {
1152                         netdev_warn(dev->net, "Failed to write HW_CFG: %d\n", ret);
1153                         return ret;
1154                 }
1155
1156                 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1157                 if (ret < 0) {
1158                         netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1159                         return ret;
1160                 }
1161
1162                 netif_dbg(dev, ifup, dev->net, "HW_CFG: 0x%08x\n", buf);
1163         }
1164
1165         /* set FIFO sizes */
1166         buf = (MAX_RX_FIFO_SIZE - 512) / 512;
1167         ret = smsc75xx_write_reg(dev, FCT_RX_FIFO_END, buf);
1168         if (ret < 0) {
1169                 netdev_warn(dev->net, "Failed to write FCT_RX_FIFO_END: %d\n", ret);
1170                 return ret;
1171         }
1172
1173         netif_dbg(dev, ifup, dev->net, "FCT_RX_FIFO_END set to 0x%08x\n", buf);
1174
1175         buf = (MAX_TX_FIFO_SIZE - 512) / 512;
1176         ret = smsc75xx_write_reg(dev, FCT_TX_FIFO_END, buf);
1177         if (ret < 0) {
1178                 netdev_warn(dev->net, "Failed to write FCT_TX_FIFO_END: %d\n", ret);
1179                 return ret;
1180         }
1181
1182         netif_dbg(dev, ifup, dev->net, "FCT_TX_FIFO_END set to 0x%08x\n", buf);
1183
1184         ret = smsc75xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL);
1185         if (ret < 0) {
1186                 netdev_warn(dev->net, "Failed to write INT_STS: %d\n", ret);
1187                 return ret;
1188         }
1189
1190         ret = smsc75xx_read_reg(dev, ID_REV, &buf);
1191         if (ret < 0) {
1192                 netdev_warn(dev->net, "Failed to read ID_REV: %d\n", ret);
1193                 return ret;
1194         }
1195
1196         netif_dbg(dev, ifup, dev->net, "ID_REV = 0x%08x\n", buf);
1197
1198         ret = smsc75xx_read_reg(dev, E2P_CMD, &buf);
1199         if (ret < 0) {
1200                 netdev_warn(dev->net, "Failed to read E2P_CMD: %d\n", ret);
1201                 return ret;
1202         }
1203
1204         /* only set default GPIO/LED settings if no EEPROM is detected */
1205         if (!(buf & E2P_CMD_LOADED)) {
1206                 ret = smsc75xx_read_reg(dev, LED_GPIO_CFG, &buf);
1207                 if (ret < 0) {
1208                         netdev_warn(dev->net, "Failed to read LED_GPIO_CFG: %d\n", ret);
1209                         return ret;
1210                 }
1211
1212                 buf &= ~(LED_GPIO_CFG_LED2_FUN_SEL | LED_GPIO_CFG_LED10_FUN_SEL);
1213                 buf |= LED_GPIO_CFG_LEDGPIO_EN | LED_GPIO_CFG_LED2_FUN_SEL;
1214
1215                 ret = smsc75xx_write_reg(dev, LED_GPIO_CFG, buf);
1216                 if (ret < 0) {
1217                         netdev_warn(dev->net, "Failed to write LED_GPIO_CFG: %d\n", ret);
1218                         return ret;
1219                 }
1220         }
1221
1222         ret = smsc75xx_write_reg(dev, FLOW, 0);
1223         if (ret < 0) {
1224                 netdev_warn(dev->net, "Failed to write FLOW: %d\n", ret);
1225                 return ret;
1226         }
1227
1228         ret = smsc75xx_write_reg(dev, FCT_FLOW, 0);
1229         if (ret < 0) {
1230                 netdev_warn(dev->net, "Failed to write FCT_FLOW: %d\n", ret);
1231                 return ret;
1232         }
1233
1234         /* Don't need rfe_ctl_lock during initialisation */
1235         ret = smsc75xx_read_reg(dev, RFE_CTL, &pdata->rfe_ctl);
1236         if (ret < 0) {
1237                 netdev_warn(dev->net, "Failed to read RFE_CTL: %d\n", ret);
1238                 return ret;
1239         }
1240
1241         pdata->rfe_ctl |= RFE_CTL_AB | RFE_CTL_DPF;
1242
1243         ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
1244         if (ret < 0) {
1245                 netdev_warn(dev->net, "Failed to write RFE_CTL: %d\n", ret);
1246                 return ret;
1247         }
1248
1249         ret = smsc75xx_read_reg(dev, RFE_CTL, &pdata->rfe_ctl);
1250         if (ret < 0) {
1251                 netdev_warn(dev->net, "Failed to read RFE_CTL: %d\n", ret);
1252                 return ret;
1253         }
1254
1255         netif_dbg(dev, ifup, dev->net, "RFE_CTL set to 0x%08x\n",
1256                   pdata->rfe_ctl);
1257
1258         /* Enable or disable checksum offload engines */
1259         smsc75xx_set_features(dev->net, dev->net->features);
1260
1261         smsc75xx_set_multicast(dev->net);
1262
1263         ret = smsc75xx_phy_initialize(dev);
1264         if (ret < 0) {
1265                 netdev_warn(dev->net, "Failed to initialize PHY: %d\n", ret);
1266                 return ret;
1267         }
1268
1269         ret = smsc75xx_read_reg(dev, INT_EP_CTL, &buf);
1270         if (ret < 0) {
1271                 netdev_warn(dev->net, "Failed to read INT_EP_CTL: %d\n", ret);
1272                 return ret;
1273         }
1274
1275         /* enable PHY interrupts */
1276         buf |= INT_ENP_PHY_INT;
1277
1278         ret = smsc75xx_write_reg(dev, INT_EP_CTL, buf);
1279         if (ret < 0) {
1280                 netdev_warn(dev->net, "Failed to write INT_EP_CTL: %d\n", ret);
1281                 return ret;
1282         }
1283
1284         /* allow mac to detect speed and duplex from phy */
1285         ret = smsc75xx_read_reg(dev, MAC_CR, &buf);
1286         if (ret < 0) {
1287                 netdev_warn(dev->net, "Failed to read MAC_CR: %d\n", ret);
1288                 return ret;
1289         }
1290
1291         buf |= (MAC_CR_ADD | MAC_CR_ASD);
1292         ret = smsc75xx_write_reg(dev, MAC_CR, buf);
1293         if (ret < 0) {
1294                 netdev_warn(dev->net, "Failed to write MAC_CR: %d\n", ret);
1295                 return ret;
1296         }
1297
1298         ret = smsc75xx_read_reg(dev, MAC_TX, &buf);
1299         if (ret < 0) {
1300                 netdev_warn(dev->net, "Failed to read MAC_TX: %d\n", ret);
1301                 return ret;
1302         }
1303
1304         buf |= MAC_TX_TXEN;
1305
1306         ret = smsc75xx_write_reg(dev, MAC_TX, buf);
1307         if (ret < 0) {
1308                 netdev_warn(dev->net, "Failed to write MAC_TX: %d\n", ret);
1309                 return ret;
1310         }
1311
1312         netif_dbg(dev, ifup, dev->net, "MAC_TX set to 0x%08x\n", buf);
1313
1314         ret = smsc75xx_read_reg(dev, FCT_TX_CTL, &buf);
1315         if (ret < 0) {
1316                 netdev_warn(dev->net, "Failed to read FCT_TX_CTL: %d\n", ret);
1317                 return ret;
1318         }
1319
1320         buf |= FCT_TX_CTL_EN;
1321
1322         ret = smsc75xx_write_reg(dev, FCT_TX_CTL, buf);
1323         if (ret < 0) {
1324                 netdev_warn(dev->net, "Failed to write FCT_TX_CTL: %d\n", ret);
1325                 return ret;
1326         }
1327
1328         netif_dbg(dev, ifup, dev->net, "FCT_TX_CTL set to 0x%08x\n", buf);
1329
1330         ret = smsc75xx_set_rx_max_frame_length(dev, dev->net->mtu + ETH_HLEN);
1331         if (ret < 0) {
1332                 netdev_warn(dev->net, "Failed to set max rx frame length\n");
1333                 return ret;
1334         }
1335
1336         ret = smsc75xx_read_reg(dev, MAC_RX, &buf);
1337         if (ret < 0) {
1338                 netdev_warn(dev->net, "Failed to read MAC_RX: %d\n", ret);
1339                 return ret;
1340         }
1341
1342         buf |= MAC_RX_RXEN;
1343
1344         ret = smsc75xx_write_reg(dev, MAC_RX, buf);
1345         if (ret < 0) {
1346                 netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
1347                 return ret;
1348         }
1349
1350         netif_dbg(dev, ifup, dev->net, "MAC_RX set to 0x%08x\n", buf);
1351
1352         ret = smsc75xx_read_reg(dev, FCT_RX_CTL, &buf);
1353         if (ret < 0) {
1354                 netdev_warn(dev->net, "Failed to read FCT_RX_CTL: %d\n", ret);
1355                 return ret;
1356         }
1357
1358         buf |= FCT_RX_CTL_EN;
1359
1360         ret = smsc75xx_write_reg(dev, FCT_RX_CTL, buf);
1361         if (ret < 0) {
1362                 netdev_warn(dev->net, "Failed to write FCT_RX_CTL: %d\n", ret);
1363                 return ret;
1364         }
1365
1366         netif_dbg(dev, ifup, dev->net, "FCT_RX_CTL set to 0x%08x\n", buf);
1367
1368         netif_dbg(dev, ifup, dev->net, "smsc75xx_reset, return 0\n");
1369         return 0;
1370 }
1371
1372 static const struct net_device_ops smsc75xx_netdev_ops = {
1373         .ndo_open               = usbnet_open,
1374         .ndo_stop               = usbnet_stop,
1375         .ndo_start_xmit         = usbnet_start_xmit,
1376         .ndo_tx_timeout         = usbnet_tx_timeout,
1377         .ndo_change_mtu         = smsc75xx_change_mtu,
1378         .ndo_set_mac_address    = eth_mac_addr,
1379         .ndo_validate_addr      = eth_validate_addr,
1380         .ndo_do_ioctl           = smsc75xx_ioctl,
1381         .ndo_set_rx_mode        = smsc75xx_set_multicast,
1382         .ndo_set_features       = smsc75xx_set_features,
1383 };
1384
1385 static int smsc75xx_bind(struct usbnet *dev, struct usb_interface *intf)
1386 {
1387         struct smsc75xx_priv *pdata = NULL;
1388         int ret;
1389
1390         printk(KERN_INFO SMSC_CHIPNAME " v" SMSC_DRIVER_VERSION "\n");
1391
1392         ret = usbnet_get_endpoints(dev, intf);
1393         if (ret < 0) {
1394                 netdev_warn(dev->net, "usbnet_get_endpoints failed: %d\n", ret);
1395                 return ret;
1396         }
1397
1398         dev->data[0] = (unsigned long)kzalloc(sizeof(struct smsc75xx_priv),
1399                                               GFP_KERNEL);
1400
1401         pdata = (struct smsc75xx_priv *)(dev->data[0]);
1402         if (!pdata)
1403                 return -ENOMEM;
1404
1405         pdata->dev = dev;
1406
1407         spin_lock_init(&pdata->rfe_ctl_lock);
1408         mutex_init(&pdata->dataport_mutex);
1409
1410         INIT_WORK(&pdata->set_multicast, smsc75xx_deferred_multicast_write);
1411
1412         if (DEFAULT_TX_CSUM_ENABLE)
1413                 dev->net->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
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_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         /*
2015          * TODO: resume() might need to handle the suspend failure
2016          * in system sleep
2017          */
2018         if (ret && PMSG_IS_AUTO(message))
2019                 usbnet_resume(intf);
2020         return ret;
2021 }
2022
2023 static int smsc75xx_resume(struct usb_interface *intf)
2024 {
2025         struct usbnet *dev = usb_get_intfdata(intf);
2026         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
2027         u8 suspend_flags = pdata->suspend_flags;
2028         int ret;
2029         u32 val;
2030
2031         netdev_dbg(dev->net, "resume suspend_flags=0x%02x\n", suspend_flags);
2032
2033         /* do this first to ensure it's cleared even in error case */
2034         pdata->suspend_flags = 0;
2035
2036         if (suspend_flags & SUSPEND_ALLMODES) {
2037                 /* Disable wakeup sources */
2038                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
2039                 if (ret < 0) {
2040                         netdev_warn(dev->net, "Error reading WUCSR\n");
2041                         return ret;
2042                 }
2043
2044                 val &= ~(WUCSR_WUEN | WUCSR_MPEN | WUCSR_PFDA_EN
2045                         | WUCSR_BCST_EN);
2046
2047                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
2048                 if (ret < 0) {
2049                         netdev_warn(dev->net, "Error writing WUCSR\n");
2050                         return ret;
2051                 }
2052
2053                 /* clear wake-up status */
2054                 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
2055                 if (ret < 0) {
2056                         netdev_warn(dev->net, "Error reading PMT_CTL\n");
2057                         return ret;
2058                 }
2059
2060                 val &= ~PMT_CTL_WOL_EN;
2061                 val |= PMT_CTL_WUPS;
2062
2063                 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
2064                 if (ret < 0) {
2065                         netdev_warn(dev->net, "Error writing PMT_CTL\n");
2066                         return ret;
2067                 }
2068         }
2069
2070         if (suspend_flags & SUSPEND_SUSPEND2) {
2071                 netdev_info(dev->net, "resuming from SUSPEND2\n");
2072
2073                 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
2074                 if (ret < 0) {
2075                         netdev_warn(dev->net, "Error reading PMT_CTL\n");
2076                         return ret;
2077                 }
2078
2079                 val |= PMT_CTL_PHY_PWRUP;
2080
2081                 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
2082                 if (ret < 0) {
2083                         netdev_warn(dev->net, "Error writing PMT_CTL\n");
2084                         return ret;
2085                 }
2086         }
2087
2088         ret = smsc75xx_wait_ready(dev, 1);
2089         if (ret < 0) {
2090                 netdev_warn(dev->net, "device not ready in smsc75xx_resume\n");
2091                 return ret;
2092         }
2093
2094         return usbnet_resume(intf);
2095 }
2096
2097 static void smsc75xx_rx_csum_offload(struct usbnet *dev, struct sk_buff *skb,
2098                                      u32 rx_cmd_a, u32 rx_cmd_b)
2099 {
2100         if (!(dev->net->features & NETIF_F_RXCSUM) ||
2101             unlikely(rx_cmd_a & RX_CMD_A_LCSM)) {
2102                 skb->ip_summed = CHECKSUM_NONE;
2103         } else {
2104                 skb->csum = ntohs((u16)(rx_cmd_b >> RX_CMD_B_CSUM_SHIFT));
2105                 skb->ip_summed = CHECKSUM_COMPLETE;
2106         }
2107 }
2108
2109 static int smsc75xx_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
2110 {
2111         /* This check is no longer done by usbnet */
2112         if (skb->len < dev->net->hard_header_len)
2113                 return 0;
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         if (skb_headroom(skb) < SMSC75XX_TX_OVERHEAD) {
2204                 struct sk_buff *skb2 =
2205                         skb_copy_expand(skb, SMSC75XX_TX_OVERHEAD, 0, flags);
2206                 dev_kfree_skb_any(skb);
2207                 skb = skb2;
2208                 if (!skb)
2209                         return NULL;
2210         }
2211
2212         tx_cmd_a = (u32)(skb->len & TX_CMD_A_LEN) | TX_CMD_A_FCS;
2213
2214         if (skb->ip_summed == CHECKSUM_PARTIAL)
2215                 tx_cmd_a |= TX_CMD_A_IPE | TX_CMD_A_TPE;
2216
2217         if (skb_is_gso(skb)) {
2218                 u16 mss = max(skb_shinfo(skb)->gso_size, TX_MSS_MIN);
2219                 tx_cmd_b = (mss << TX_CMD_B_MSS_SHIFT) & TX_CMD_B_MSS;
2220
2221                 tx_cmd_a |= TX_CMD_A_LSO;
2222         } else {
2223                 tx_cmd_b = 0;
2224         }
2225
2226         skb_push(skb, 4);
2227         cpu_to_le32s(&tx_cmd_b);
2228         memcpy(skb->data, &tx_cmd_b, 4);
2229
2230         skb_push(skb, 4);
2231         cpu_to_le32s(&tx_cmd_a);
2232         memcpy(skb->data, &tx_cmd_a, 4);
2233
2234         return skb;
2235 }
2236
2237 static int smsc75xx_manage_power(struct usbnet *dev, int on)
2238 {
2239         dev->intf->needs_remote_wakeup = on;
2240         return 0;
2241 }
2242
2243 static const struct driver_info smsc75xx_info = {
2244         .description    = "smsc75xx USB 2.0 Gigabit Ethernet",
2245         .bind           = smsc75xx_bind,
2246         .unbind         = smsc75xx_unbind,
2247         .link_reset     = smsc75xx_link_reset,
2248         .reset          = smsc75xx_reset,
2249         .rx_fixup       = smsc75xx_rx_fixup,
2250         .tx_fixup       = smsc75xx_tx_fixup,
2251         .status         = smsc75xx_status,
2252         .manage_power   = smsc75xx_manage_power,
2253         .flags          = FLAG_ETHER | FLAG_SEND_ZLP | FLAG_LINK_INTR,
2254 };
2255
2256 static const struct usb_device_id products[] = {
2257         {
2258                 /* SMSC7500 USB Gigabit Ethernet Device */
2259                 USB_DEVICE(USB_VENDOR_ID_SMSC, USB_PRODUCT_ID_LAN7500),
2260                 .driver_info = (unsigned long) &smsc75xx_info,
2261         },
2262         {
2263                 /* SMSC7500 USB Gigabit Ethernet Device */
2264                 USB_DEVICE(USB_VENDOR_ID_SMSC, USB_PRODUCT_ID_LAN7505),
2265                 .driver_info = (unsigned long) &smsc75xx_info,
2266         },
2267         { },            /* END */
2268 };
2269 MODULE_DEVICE_TABLE(usb, products);
2270
2271 static struct usb_driver smsc75xx_driver = {
2272         .name           = SMSC_CHIPNAME,
2273         .id_table       = products,
2274         .probe          = usbnet_probe,
2275         .suspend        = smsc75xx_suspend,
2276         .resume         = smsc75xx_resume,
2277         .reset_resume   = smsc75xx_resume,
2278         .disconnect     = usbnet_disconnect,
2279         .disable_hub_initiated_lpm = 1,
2280         .supports_autosuspend = 1,
2281 };
2282
2283 module_usb_driver(smsc75xx_driver);
2284
2285 MODULE_AUTHOR("Nancy Lin");
2286 MODULE_AUTHOR("Steve Glendinning <steve.glendinning@shawell.net>");
2287 MODULE_DESCRIPTION("SMSC75XX USB 2.0 Gigabit Ethernet Devices");
2288 MODULE_LICENSE("GPL");