drivers/net/usb/smsc75xx.c

   1  /***************************************************************************
   2  *
   3  * Copyright (C) 2007-2010 SMSC
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License
   7  * as published by the Free Software Foundation; either version 2
   8  * of the License, or (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, see <http://www.gnu.org/licenses/>.
  17  *
  18  *****************************************************************************/
  19
  20 #include <linux/module.h>
  21 #include <linux/kmod.h>
  22 #include <linux/init.h>
  23 #include <linux/netdevice.h>
  24 #include <linux/etherdevice.h>
  25 #include <linux/ethtool.h>
  26 #include <linux/mii.h>
  27 #include <linux/usb.h>
  28 #include <linux/bitrev.h>
  29 #include <linux/crc16.h>
  30 #include <linux/crc32.h>
  31 #include <linux/usb/usbnet.h>
  32 #include <linux/slab.h>
  33 #include "smsc75xx.h"
  34
  35 #define SMSC_CHIPNAME                   "smsc75xx"
  36 #define SMSC_DRIVER_VERSION             "1.0.0"
  37 #define HS_USB_PKT_SIZE                 (512)
  38 #define FS_USB_PKT_SIZE                 (64)
  39 #define DEFAULT_HS_BURST_CAP_SIZE       (16 * 1024 + 5 * HS_USB_PKT_SIZE)
  40 #define DEFAULT_FS_BURST_CAP_SIZE       (6 * 1024 + 33 * FS_USB_PKT_SIZE)
  41 #define DEFAULT_BULK_IN_DELAY           (0x00002000)
  42 #define MAX_SINGLE_PACKET_SIZE          (9000)
  43 #define LAN75XX_EEPROM_MAGIC            (0x7500)
  44 #define EEPROM_MAC_OFFSET               (0x01)
  45 #define DEFAULT_TX_CSUM_ENABLE          (true)
  46 #define DEFAULT_RX_CSUM_ENABLE          (true)
  47 #define SMSC75XX_INTERNAL_PHY_ID        (1)
  48 #define SMSC75XX_TX_OVERHEAD            (8)
  49 #define MAX_RX_FIFO_SIZE                (20 * 1024)
  50 #define MAX_TX_FIFO_SIZE                (12 * 1024)
  51 #define USB_VENDOR_ID_SMSC              (0x0424)
  52 #define USB_PRODUCT_ID_LAN7500          (0x7500)
  53 #define USB_PRODUCT_ID_LAN7505          (0x7505)
  54 #define RXW_PADDING                     2
  55 #define SUPPORTED_WAKE                  (WAKE_PHY | WAKE_UCAST | WAKE_BCAST | \
  56                                          WAKE_MCAST | WAKE_ARP | WAKE_MAGIC)
  57
  58 #define SUSPEND_SUSPEND0                (0x01)
  59 #define SUSPEND_SUSPEND1                (0x02)
  60 #define SUSPEND_SUSPEND2                (0x04)
  61 #define SUSPEND_SUSPEND3                (0x08)
  62 #define SUSPEND_ALLMODES                (SUSPEND_SUSPEND0 | SUSPEND_SUSPEND1 | \
  63                                          SUSPEND_SUSPEND2 | SUSPEND_SUSPEND3)
  64
  65 struct smsc75xx_priv {
  66         struct usbnet *dev;
  67         u32 rfe_ctl;
  68         u32 wolopts;
  69         u32 multicast_hash_table[DP_SEL_VHF_HASH_LEN];
  70         struct mutex dataport_mutex;
  71         spinlock_t rfe_ctl_lock;
  72         struct work_struct set_multicast;
  73         u8 suspend_flags;
  74 };
  75
  76 struct usb_context {
  77         struct usb_ctrlrequest req;
  78         struct usbnet *dev;
  79 };
  80
  81 static bool turbo_mode = true;
  82 module_param(turbo_mode, bool, 0644);
  83 MODULE_PARM_DESC(turbo_mode, "Enable multiple frames per Rx transaction");
  84
  85 static int __must_check __smsc75xx_read_reg(struct usbnet *dev, u32 index,
  86                                             u32 *data, int in_pm)
  87 {
  88         u32 buf;
  89         int ret;
  90         int (*fn)(struct usbnet *, u8, u8, u16, u16, void *, u16);
  91
  92         BUG_ON(!dev);
  93
  94         if (!in_pm)
  95                 fn = usbnet_read_cmd;
  96         else
  97                 fn = usbnet_read_cmd_nopm;
  98
  99         ret = fn(dev, USB_VENDOR_REQUEST_READ_REGISTER, USB_DIR_IN
 100                  | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 101                  0, index, &buf, 4);
 102         if (unlikely(ret < 0))
 103                 netdev_warn(dev->net, "Failed to read reg index 0x%08x: %d\n",
 104                             index, ret);
 105
 106         le32_to_cpus(&buf);
 107         *data = buf;
 108
 109         return ret;
 110 }
 111
 112 static int __must_check __smsc75xx_write_reg(struct usbnet *dev, u32 index,
 113                                              u32 data, int in_pm)
 114 {
 115         u32 buf;
 116         int ret;
 117         int (*fn)(struct usbnet *, u8, u8, u16, u16, const void *, u16);
 118
 119         BUG_ON(!dev);
 120
 121         if (!in_pm)
 122                 fn = usbnet_write_cmd;
 123         else
 124                 fn = usbnet_write_cmd_nopm;
 125
 126         buf = data;
 127         cpu_to_le32s(&buf);
 128
 129         ret = fn(dev, USB_VENDOR_REQUEST_WRITE_REGISTER, USB_DIR_OUT
 130                  | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 131                  0, index, &buf, 4);
 132         if (unlikely(ret < 0))
 133                 netdev_warn(dev->net, "Failed to write reg index 0x%08x: %d\n",
 134                             index, ret);
 135
 136         return ret;
 137 }
 138
 139 static int __must_check smsc75xx_read_reg_nopm(struct usbnet *dev, u32 index,
 140                                                u32 *data)
 141 {
 142         return __smsc75xx_read_reg(dev, index, data, 1);
 143 }
 144
 145 static int __must_check smsc75xx_write_reg_nopm(struct usbnet *dev, u32 index,
 146                                                 u32 data)
 147 {
 148         return __smsc75xx_write_reg(dev, index, data, 1);
 149 }
 150
 151 static int __must_check smsc75xx_read_reg(struct usbnet *dev, u32 index,
 152                                           u32 *data)
 153 {
 154         return __smsc75xx_read_reg(dev, index, data, 0);
 155 }
 156
 157 static int __must_check smsc75xx_write_reg(struct usbnet *dev, u32 index,
 158                                            u32 data)
 159 {
 160         return __smsc75xx_write_reg(dev, index, data, 0);
 161 }
 162
 163 /* Loop until the read is completed with timeout
 164  * called with phy_mutex held */
 165 static __must_check int __smsc75xx_phy_wait_not_busy(struct usbnet *dev,
 166                                                      int in_pm)
 167 {
 168         unsigned long start_time = jiffies;
 169         u32 val;
 170         int ret;
 171
 172         do {
 173                 ret = __smsc75xx_read_reg(dev, MII_ACCESS, &val, in_pm);
 174                 if (ret < 0) {
 175                         netdev_warn(dev->net, "Error reading MII_ACCESS\n");
 176                         return ret;
 177                 }
 178
 179                 if (!(val & MII_ACCESS_BUSY))
 180                         return 0;
 181         } while (!time_after(jiffies, start_time + HZ));
 182
 183         return -EIO;
 184 }
 185
 186 static int __smsc75xx_mdio_read(struct net_device *netdev, int phy_id, int idx,
 187                                 int in_pm)
 188 {
 189         struct usbnet *dev = netdev_priv(netdev);
 190         u32 val, addr;
 191         int ret;
 192
 193         mutex_lock(&dev->phy_mutex);
 194
 195         /* confirm MII not busy */
 196         ret = __smsc75xx_phy_wait_not_busy(dev, in_pm);
 197         if (ret < 0) {
 198                 netdev_warn(dev->net, "MII is busy in smsc75xx_mdio_read\n");
 199                 goto done;
 200         }
 201
 202         /* set the address, index & direction (read from PHY) */
 203         phy_id &= dev->mii.phy_id_mask;
 204         idx &= dev->mii.reg_num_mask;
 205         addr = ((phy_id << MII_ACCESS_PHY_ADDR_SHIFT) & MII_ACCESS_PHY_ADDR)
 206                 | ((idx << MII_ACCESS_REG_ADDR_SHIFT) & MII_ACCESS_REG_ADDR)
 207                 | MII_ACCESS_READ | MII_ACCESS_BUSY;
 208         ret = __smsc75xx_write_reg(dev, MII_ACCESS, addr, in_pm);
 209         if (ret < 0) {
 210                 netdev_warn(dev->net, "Error writing MII_ACCESS\n");
 211                 goto done;
 212         }
 213
 214         ret = __smsc75xx_phy_wait_not_busy(dev, in_pm);
 215         if (ret < 0) {
 216                 netdev_warn(dev->net, "Timed out reading MII reg %02X\n", idx);
 217                 goto done;
 218         }
 219
 220         ret = __smsc75xx_read_reg(dev, MII_DATA, &val, in_pm);
 221         if (ret < 0) {
 222                 netdev_warn(dev->net, "Error reading MII_DATA\n");
 223                 goto done;
 224         }
 225
 226         ret = (u16)(val & 0xFFFF);
 227
 228 done:
 229         mutex_unlock(&dev->phy_mutex);
 230         return ret;
 231 }
 232
 233 static void __smsc75xx_mdio_write(struct net_device *netdev, int phy_id,
 234                                   int idx, int regval, int in_pm)
 235 {
 236         struct usbnet *dev = netdev_priv(netdev);
 237         u32 val, addr;
 238         int ret;
 239
 240         mutex_lock(&dev->phy_mutex);
 241
 242         /* confirm MII not busy */
 243         ret = __smsc75xx_phy_wait_not_busy(dev, in_pm);
 244         if (ret < 0) {
 245                 netdev_warn(dev->net, "MII is busy in smsc75xx_mdio_write\n");
 246                 goto done;
 247         }
 248
 249         val = regval;
 250         ret = __smsc75xx_write_reg(dev, MII_DATA, val, in_pm);
 251         if (ret < 0) {
 252                 netdev_warn(dev->net, "Error writing MII_DATA\n");
 253                 goto done;
 254         }
 255
 256         /* set the address, index & direction (write to PHY) */
 257         phy_id &= dev->mii.phy_id_mask;
 258         idx &= dev->mii.reg_num_mask;
 259         addr = ((phy_id << MII_ACCESS_PHY_ADDR_SHIFT) & MII_ACCESS_PHY_ADDR)
 260                 | ((idx << MII_ACCESS_REG_ADDR_SHIFT) & MII_ACCESS_REG_ADDR)
 261                 | MII_ACCESS_WRITE | MII_ACCESS_BUSY;
 262         ret = __smsc75xx_write_reg(dev, MII_ACCESS, addr, in_pm);
 263         if (ret < 0) {
 264                 netdev_warn(dev->net, "Error writing MII_ACCESS\n");
 265                 goto done;
 266         }
 267
 268         ret = __smsc75xx_phy_wait_not_busy(dev, in_pm);
 269         if (ret < 0) {
 270                 netdev_warn(dev->net, "Timed out writing MII reg %02X\n", idx);
 271                 goto done;
 272         }
 273
 274 done:
 275         mutex_unlock(&dev->phy_mutex);
 276 }
 277
 278 static int smsc75xx_mdio_read_nopm(struct net_device *netdev, int phy_id,
 279                                    int idx)
 280 {
 281         return __smsc75xx_mdio_read(netdev, phy_id, idx, 1);
 282 }
 283
 284 static void smsc75xx_mdio_write_nopm(struct net_device *netdev, int phy_id,
 285                                      int idx, int regval)
 286 {
 287         __smsc75xx_mdio_write(netdev, phy_id, idx, regval, 1);
 288 }
 289
 290 static int smsc75xx_mdio_read(struct net_device *netdev, int phy_id, int idx)
 291 {
 292         return __smsc75xx_mdio_read(netdev, phy_id, idx, 0);
 293 }
 294
 295 static void smsc75xx_mdio_write(struct net_device *netdev, int phy_id, int idx,
 296                                 int regval)
 297 {
 298         __smsc75xx_mdio_write(netdev, phy_id, idx, regval, 0);
 299 }
 300
 301 static int smsc75xx_wait_eeprom(struct usbnet *dev)
 302 {
 303         unsigned long start_time = jiffies;
 304         u32 val;
 305         int ret;
 306
 307         do {
 308                 ret = smsc75xx_read_reg(dev, E2P_CMD, &val);
 309                 if (ret < 0) {
 310                         netdev_warn(dev->net, "Error reading E2P_CMD\n");
 311                         return ret;
 312                 }
 313
 314                 if (!(val & E2P_CMD_BUSY) || (val & E2P_CMD_TIMEOUT))
 315                         break;
 316                 udelay(40);
 317         } while (!time_after(jiffies, start_time + HZ));
 318
 319         if (val & (E2P_CMD_TIMEOUT | E2P_CMD_BUSY)) {
 320                 netdev_warn(dev->net, "EEPROM read operation timeout\n");
 321                 return -EIO;
 322         }
 323
 324         return 0;
 325 }
 326
 327 static int smsc75xx_eeprom_confirm_not_busy(struct usbnet *dev)
 328 {
 329         unsigned long start_time = jiffies;
 330         u32 val;
 331         int ret;
 332
 333         do {
 334                 ret = smsc75xx_read_reg(dev, E2P_CMD, &val);
 335                 if (ret < 0) {
 336                         netdev_warn(dev->net, "Error reading E2P_CMD\n");
 337                         return ret;
 338                 }
 339
 340                 if (!(val & E2P_CMD_BUSY))
 341                         return 0;
 342
 343                 udelay(40);
 344         } while (!time_after(jiffies, start_time + HZ));
 345
 346         netdev_warn(dev->net, "EEPROM is busy\n");
 347         return -EIO;
 348 }
 349
 350 static int smsc75xx_read_eeprom(struct usbnet *dev, u32 offset, u32 length,
 351                                 u8 *data)
 352 {
 353         u32 val;
 354         int i, ret;
 355
 356         BUG_ON(!dev);
 357         BUG_ON(!data);
 358
 359         ret = smsc75xx_eeprom_confirm_not_busy(dev);
 360         if (ret)
 361                 return ret;
 362
 363         for (i = 0; i < length; i++) {
 364                 val = E2P_CMD_BUSY | E2P_CMD_READ | (offset & E2P_CMD_ADDR);
 365                 ret = smsc75xx_write_reg(dev, E2P_CMD, val);
 366                 if (ret < 0) {
 367                         netdev_warn(dev->net, "Error writing E2P_CMD\n");
 368                         return ret;
 369                 }
 370
 371                 ret = smsc75xx_wait_eeprom(dev);
 372                 if (ret < 0)
 373                         return ret;
 374
 375                 ret = smsc75xx_read_reg(dev, E2P_DATA, &val);
 376                 if (ret < 0) {
 377                         netdev_warn(dev->net, "Error reading E2P_DATA\n");
 378                         return ret;
 379                 }
 380
 381                 data[i] = val & 0xFF;
 382                 offset++;
 383         }
 384
 385         return 0;
 386 }
 387
 388 static int smsc75xx_write_eeprom(struct usbnet *dev, u32 offset, u32 length,
 389                                  u8 *data)
 390 {
 391         u32 val;
 392         int i, ret;
 393
 394         BUG_ON(!dev);
 395         BUG_ON(!data);
 396
 397         ret = smsc75xx_eeprom_confirm_not_busy(dev);
 398         if (ret)
 399                 return ret;
 400
 401         /* Issue write/erase enable command */
 402         val = E2P_CMD_BUSY | E2P_CMD_EWEN;
 403         ret = smsc75xx_write_reg(dev, E2P_CMD, val);
 404         if (ret < 0) {
 405                 netdev_warn(dev->net, "Error writing E2P_CMD\n");
 406                 return ret;
 407         }
 408
 409         ret = smsc75xx_wait_eeprom(dev);
 410         if (ret < 0)
 411                 return ret;
 412
 413         for (i = 0; i < length; i++) {
 414
 415                 /* Fill data register */
 416                 val = data[i];
 417                 ret = smsc75xx_write_reg(dev, E2P_DATA, val);
 418                 if (ret < 0) {
 419                         netdev_warn(dev->net, "Error writing E2P_DATA\n");
 420                         return ret;
 421                 }
 422
 423                 /* Send "write" command */
 424                 val = E2P_CMD_BUSY | E2P_CMD_WRITE | (offset & E2P_CMD_ADDR);
 425                 ret = smsc75xx_write_reg(dev, E2P_CMD, val);
 426                 if (ret < 0) {
 427                         netdev_warn(dev->net, "Error writing E2P_CMD\n");
 428                         return ret;
 429                 }
 430
 431                 ret = smsc75xx_wait_eeprom(dev);
 432                 if (ret < 0)
 433                         return ret;
 434
 435                 offset++;
 436         }
 437
 438         return 0;
 439 }
 440
 441 static int smsc75xx_dataport_wait_not_busy(struct usbnet *dev)
 442 {
 443         int i, ret;
 444
 445         for (i = 0; i < 100; i++) {
 446                 u32 dp_sel;
 447                 ret = smsc75xx_read_reg(dev, DP_SEL, &dp_sel);
 448                 if (ret < 0) {
 449                         netdev_warn(dev->net, "Error reading DP_SEL\n");
 450                         return ret;
 451                 }
 452
 453                 if (dp_sel & DP_SEL_DPRDY)
 454                         return 0;
 455
 456                 udelay(40);
 457         }
 458
 459         netdev_warn(dev->net, "smsc75xx_dataport_wait_not_busy timed out\n");
 460
 461         return -EIO;
 462 }
 463
 464 static int smsc75xx_dataport_write(struct usbnet *dev, u32 ram_select, u32 addr,
 465                                    u32 length, u32 *buf)
 466 {
 467         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 468         u32 dp_sel;
 469         int i, ret;
 470
 471         mutex_lock(&pdata->dataport_mutex);
 472
 473         ret = smsc75xx_dataport_wait_not_busy(dev);
 474         if (ret < 0) {
 475                 netdev_warn(dev->net, "smsc75xx_dataport_write busy on entry\n");
 476                 goto done;
 477         }
 478
 479         ret = smsc75xx_read_reg(dev, DP_SEL, &dp_sel);
 480         if (ret < 0) {
 481                 netdev_warn(dev->net, "Error reading DP_SEL\n");
 482                 goto done;
 483         }
 484
 485         dp_sel &= ~DP_SEL_RSEL;
 486         dp_sel |= ram_select;
 487         ret = smsc75xx_write_reg(dev, DP_SEL, dp_sel);
 488         if (ret < 0) {
 489                 netdev_warn(dev->net, "Error writing DP_SEL\n");
 490                 goto done;
 491         }
 492
 493         for (i = 0; i < length; i++) {
 494                 ret = smsc75xx_write_reg(dev, DP_ADDR, addr + i);
 495                 if (ret < 0) {
 496                         netdev_warn(dev->net, "Error writing DP_ADDR\n");
 497                         goto done;
 498                 }
 499
 500                 ret = smsc75xx_write_reg(dev, DP_DATA, buf[i]);
 501                 if (ret < 0) {
 502                         netdev_warn(dev->net, "Error writing DP_DATA\n");
 503                         goto done;
 504                 }
 505
 506                 ret = smsc75xx_write_reg(dev, DP_CMD, DP_CMD_WRITE);
 507                 if (ret < 0) {
 508                         netdev_warn(dev->net, "Error writing DP_CMD\n");
 509                         goto done;
 510                 }
 511
 512                 ret = smsc75xx_dataport_wait_not_busy(dev);
 513                 if (ret < 0) {
 514                         netdev_warn(dev->net, "smsc75xx_dataport_write timeout\n");
 515                         goto done;
 516                 }
 517         }
 518
 519 done:
 520         mutex_unlock(&pdata->dataport_mutex);
 521         return ret;
 522 }
 523
 524 /* returns hash bit number for given MAC address */
 525 static u32 smsc75xx_hash(char addr[ETH_ALEN])
 526 {
 527         return (ether_crc(ETH_ALEN, addr) >> 23) & 0x1ff;
 528 }
 529
 530 static void smsc75xx_deferred_multicast_write(struct work_struct *param)
 531 {
 532         struct smsc75xx_priv *pdata =
 533                 container_of(param, struct smsc75xx_priv, set_multicast);
 534         struct usbnet *dev = pdata->dev;
 535         int ret;
 536
 537         netif_dbg(dev, drv, dev->net, "deferred multicast write 0x%08x\n",
 538                   pdata->rfe_ctl);
 539
 540         smsc75xx_dataport_write(dev, DP_SEL_VHF, DP_SEL_VHF_VLAN_LEN,
 541                 DP_SEL_VHF_HASH_LEN, pdata->multicast_hash_table);
 542
 543         ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
 544         if (ret < 0)
 545                 netdev_warn(dev->net, "Error writing RFE_CRL\n");
 546 }
 547
 548 static void smsc75xx_set_multicast(struct net_device *netdev)
 549 {
 550         struct usbnet *dev = netdev_priv(netdev);
 551         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 552         unsigned long flags;
 553         int i;
 554
 555         spin_lock_irqsave(&pdata->rfe_ctl_lock, flags);
 556
 557         pdata->rfe_ctl &=
 558                 ~(RFE_CTL_AU | RFE_CTL_AM | RFE_CTL_DPF | RFE_CTL_MHF);
 559         pdata->rfe_ctl |= RFE_CTL_AB;
 560
 561         for (i = 0; i < DP_SEL_VHF_HASH_LEN; i++)
 562                 pdata->multicast_hash_table[i] = 0;
 563
 564         if (dev->net->flags & IFF_PROMISC) {
 565                 netif_dbg(dev, drv, dev->net, "promiscuous mode enabled\n");
 566                 pdata->rfe_ctl |= RFE_CTL_AM | RFE_CTL_AU;
 567         } else if (dev->net->flags & IFF_ALLMULTI) {
 568                 netif_dbg(dev, drv, dev->net, "receive all multicast enabled\n");
 569                 pdata->rfe_ctl |= RFE_CTL_AM | RFE_CTL_DPF;
 570         } else if (!netdev_mc_empty(dev->net)) {
 571                 struct netdev_hw_addr *ha;
 572
 573                 netif_dbg(dev, drv, dev->net, "receive multicast hash filter\n");
 574
 575                 pdata->rfe_ctl |= RFE_CTL_MHF | RFE_CTL_DPF;
 576
 577                 netdev_for_each_mc_addr(ha, netdev) {
 578                         u32 bitnum = smsc75xx_hash(ha->addr);
 579                         pdata->multicast_hash_table[bitnum / 32] |=
 580                                 (1 << (bitnum % 32));
 581                 }
 582         } else {
 583                 netif_dbg(dev, drv, dev->net, "receive own packets only\n");
 584                 pdata->rfe_ctl |= RFE_CTL_DPF;
 585         }
 586
 587         spin_unlock_irqrestore(&pdata->rfe_ctl_lock, flags);
 588
 589         /* defer register writes to a sleepable context */
 590         schedule_work(&pdata->set_multicast);
 591 }
 592
 593 static int smsc75xx_update_flowcontrol(struct usbnet *dev, u8 duplex,
 594                                             u16 lcladv, u16 rmtadv)
 595 {
 596         u32 flow = 0, fct_flow = 0;
 597         int ret;
 598
 599         if (duplex == DUPLEX_FULL) {
 600                 u8 cap = mii_resolve_flowctrl_fdx(lcladv, rmtadv);
 601
 602                 if (cap & FLOW_CTRL_TX) {
 603                         flow = (FLOW_TX_FCEN | 0xFFFF);
 604                         /* set fct_flow thresholds to 20% and 80% */
 605                         fct_flow = (8 << 8) | 32;
 606                 }
 607
 608                 if (cap & FLOW_CTRL_RX)
 609                         flow |= FLOW_RX_FCEN;
 610
 611                 netif_dbg(dev, link, dev->net, "rx pause %s, tx pause %s\n",
 612                           (cap & FLOW_CTRL_RX ? "enabled" : "disabled"),
 613                           (cap & FLOW_CTRL_TX ? "enabled" : "disabled"));
 614         } else {
 615                 netif_dbg(dev, link, dev->net, "half duplex\n");
 616         }
 617
 618         ret = smsc75xx_write_reg(dev, FLOW, flow);
 619         if (ret < 0) {
 620                 netdev_warn(dev->net, "Error writing FLOW\n");
 621                 return ret;
 622         }
 623
 624         ret = smsc75xx_write_reg(dev, FCT_FLOW, fct_flow);
 625         if (ret < 0) {
 626                 netdev_warn(dev->net, "Error writing FCT_FLOW\n");
 627                 return ret;
 628         }
 629
 630         return 0;
 631 }
 632
 633 static int smsc75xx_link_reset(struct usbnet *dev)
 634 {
 635         struct mii_if_info *mii = &dev->mii;
 636         struct ethtool_cmd ecmd = { .cmd = ETHTOOL_GSET };
 637         u16 lcladv, rmtadv;
 638         int ret;
 639
 640         /* write to clear phy interrupt status */
 641         smsc75xx_mdio_write(dev->net, mii->phy_id, PHY_INT_SRC,
 642                 PHY_INT_SRC_CLEAR_ALL);
 643
 644         ret = smsc75xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL);
 645         if (ret < 0) {
 646                 netdev_warn(dev->net, "Error writing INT_STS\n");
 647                 return ret;
 648         }
 649
 650         mii_check_media(mii, 1, 1);
 651         mii_ethtool_gset(&dev->mii, &ecmd);
 652         lcladv = smsc75xx_mdio_read(dev->net, mii->phy_id, MII_ADVERTISE);
 653         rmtadv = smsc75xx_mdio_read(dev->net, mii->phy_id, MII_LPA);
 654
 655         netif_dbg(dev, link, dev->net, "speed: %u duplex: %d lcladv: %04x rmtadv: %04x\n",
 656                   ethtool_cmd_speed(&ecmd), ecmd.duplex, lcladv, rmtadv);
 657
 658         return smsc75xx_update_flowcontrol(dev, ecmd.duplex, lcladv, rmtadv);
 659 }
 660
 661 static void smsc75xx_status(struct usbnet *dev, struct urb *urb)
 662 {
 663         u32 intdata;
 664
 665         if (urb->actual_length != 4) {
 666                 netdev_warn(dev->net, "unexpected urb length %d\n",
 667                             urb->actual_length);
 668                 return;
 669         }
 670
 671         memcpy(&intdata, urb->transfer_buffer, 4);
 672         le32_to_cpus(&intdata);
 673
 674         netif_dbg(dev, link, dev->net, "intdata: 0x%08X\n", intdata);
 675
 676         if (intdata & INT_ENP_PHY_INT)
 677                 usbnet_defer_kevent(dev, EVENT_LINK_RESET);
 678         else
 679                 netdev_warn(dev->net, "unexpected interrupt, intdata=0x%08X\n",
 680                             intdata);
 681 }
 682
 683 static int smsc75xx_ethtool_get_eeprom_len(struct net_device *net)
 684 {
 685         return MAX_EEPROM_SIZE;
 686 }
 687
 688 static int smsc75xx_ethtool_get_eeprom(struct net_device *netdev,
 689                                        struct ethtool_eeprom *ee, u8 *data)
 690 {
 691         struct usbnet *dev = netdev_priv(netdev);
 692
 693         ee->magic = LAN75XX_EEPROM_MAGIC;
 694
 695         return smsc75xx_read_eeprom(dev, ee->offset, ee->len, data);
 696 }
 697
 698 static int smsc75xx_ethtool_set_eeprom(struct net_device *netdev,
 699                                        struct ethtool_eeprom *ee, u8 *data)
 700 {
 701         struct usbnet *dev = netdev_priv(netdev);
 702
 703         if (ee->magic != LAN75XX_EEPROM_MAGIC) {
 704                 netdev_warn(dev->net, "EEPROM: magic value mismatch: 0x%x\n",
 705                             ee->magic);
 706                 return -EINVAL;
 707         }
 708
 709         return smsc75xx_write_eeprom(dev, ee->offset, ee->len, data);
 710 }
 711
 712 static void smsc75xx_ethtool_get_wol(struct net_device *net,
 713                                      struct ethtool_wolinfo *wolinfo)
 714 {
 715         struct usbnet *dev = netdev_priv(net);
 716         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 717
 718         wolinfo->supported = SUPPORTED_WAKE;
 719         wolinfo->wolopts = pdata->wolopts;
 720 }
 721
 722 static int smsc75xx_ethtool_set_wol(struct net_device *net,
 723                                     struct ethtool_wolinfo *wolinfo)
 724 {
 725         struct usbnet *dev = netdev_priv(net);
 726         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 727         int ret;
 728
 729         pdata->wolopts = wolinfo->wolopts & SUPPORTED_WAKE;
 730
 731         ret = device_set_wakeup_enable(&dev->udev->dev, pdata->wolopts);
 732         if (ret < 0)
 733                 netdev_warn(dev->net, "device_set_wakeup_enable error %d\n", ret);
 734
 735         return ret;
 736 }
 737
 738 static const struct ethtool_ops smsc75xx_ethtool_ops = {
 739         .get_link       = usbnet_get_link,
 740         .nway_reset     = usbnet_nway_reset,
 741         .get_drvinfo    = usbnet_get_drvinfo,
 742         .get_msglevel   = usbnet_get_msglevel,
 743         .set_msglevel   = usbnet_set_msglevel,
 744         .get_settings   = usbnet_get_settings,
 745         .set_settings   = usbnet_set_settings,
 746         .get_eeprom_len = smsc75xx_ethtool_get_eeprom_len,
 747         .get_eeprom     = smsc75xx_ethtool_get_eeprom,
 748         .set_eeprom     = smsc75xx_ethtool_set_eeprom,
 749         .get_wol        = smsc75xx_ethtool_get_wol,
 750         .set_wol        = smsc75xx_ethtool_set_wol,
 751 };
 752
 753 static int smsc75xx_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
 754 {
 755         struct usbnet *dev = netdev_priv(netdev);
 756
 757         if (!netif_running(netdev))
 758                 return -EINVAL;
 759
 760         return generic_mii_ioctl(&dev->mii, if_mii(rq), cmd, NULL);
 761 }
 762
 763 static void smsc75xx_init_mac_address(struct usbnet *dev)
 764 {
 765         /* try reading mac address from EEPROM */
 766         if (smsc75xx_read_eeprom(dev, EEPROM_MAC_OFFSET, ETH_ALEN,
 767                         dev->net->dev_addr) == 0) {
 768                 if (is_valid_ether_addr(dev->net->dev_addr)) {
 769                         /* eeprom values are valid so use them */
 770                         netif_dbg(dev, ifup, dev->net,
 771                                   "MAC address read from EEPROM\n");
 772                         return;
 773                 }
 774         }
 775
 776         /* no eeprom, or eeprom values are invalid. generate random MAC */
 777         eth_hw_addr_random(dev->net);
 778         netif_dbg(dev, ifup, dev->net, "MAC address set to eth_random_addr\n");
 779 }
 780
 781 static int smsc75xx_set_mac_address(struct usbnet *dev)
 782 {
 783         u32 addr_lo = dev->net->dev_addr[0] | dev->net->dev_addr[1] << 8 |
 784                 dev->net->dev_addr[2] << 16 | dev->net->dev_addr[3] << 24;
 785         u32 addr_hi = dev->net->dev_addr[4] | dev->net->dev_addr[5] << 8;
 786
 787         int ret = smsc75xx_write_reg(dev, RX_ADDRH, addr_hi);
 788         if (ret < 0) {
 789                 netdev_warn(dev->net, "Failed to write RX_ADDRH: %d\n", ret);
 790                 return ret;
 791         }
 792
 793         ret = smsc75xx_write_reg(dev, RX_ADDRL, addr_lo);
 794         if (ret < 0) {
 795                 netdev_warn(dev->net, "Failed to write RX_ADDRL: %d\n", ret);
 796                 return ret;
 797         }
 798
 799         addr_hi |= ADDR_FILTX_FB_VALID;
 800         ret = smsc75xx_write_reg(dev, ADDR_FILTX, addr_hi);
 801         if (ret < 0) {
 802                 netdev_warn(dev->net, "Failed to write ADDR_FILTX: %d\n", ret);
 803                 return ret;
 804         }
 805
 806         ret = smsc75xx_write_reg(dev, ADDR_FILTX + 4, addr_lo);
 807         if (ret < 0)
 808                 netdev_warn(dev->net, "Failed to write ADDR_FILTX+4: %d\n", ret);
 809
 810         return ret;
 811 }
 812
 813 static int smsc75xx_phy_initialize(struct usbnet *dev)
 814 {
 815         int bmcr, ret, timeout = 0;
 816
 817         /* Initialize MII structure */
 818         dev->mii.dev = dev->net;
 819         dev->mii.mdio_read = smsc75xx_mdio_read;
 820         dev->mii.mdio_write = smsc75xx_mdio_write;
 821         dev->mii.phy_id_mask = 0x1f;
 822         dev->mii.reg_num_mask = 0x1f;
 823         dev->mii.supports_gmii = 1;
 824         dev->mii.phy_id = SMSC75XX_INTERNAL_PHY_ID;
 825
 826         /* reset phy and wait for reset to complete */
 827         smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_BMCR, BMCR_RESET);
 828
 829         do {
 830                 msleep(10);
 831                 bmcr = smsc75xx_mdio_read(dev->net, dev->mii.phy_id, MII_BMCR);
 832                 if (bmcr < 0) {
 833                         netdev_warn(dev->net, "Error reading MII_BMCR\n");
 834                         return bmcr;
 835                 }
 836                 timeout++;
 837         } while ((bmcr & BMCR_RESET) && (timeout < 100));
 838
 839         if (timeout >= 100) {
 840                 netdev_warn(dev->net, "timeout on PHY Reset\n");
 841                 return -EIO;
 842         }
 843
 844         smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_ADVERTISE,
 845                 ADVERTISE_ALL | ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP |
 846                 ADVERTISE_PAUSE_ASYM);
 847         smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_CTRL1000,
 848                 ADVERTISE_1000FULL);
 849
 850         /* read and write to clear phy interrupt status */
 851         ret = smsc75xx_mdio_read(dev->net, dev->mii.phy_id, PHY_INT_SRC);
 852         if (ret < 0) {
 853                 netdev_warn(dev->net, "Error reading PHY_INT_SRC\n");
 854                 return ret;
 855         }
 856
 857         smsc75xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_SRC, 0xffff);
 858
 859         smsc75xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_MASK,
 860                 PHY_INT_MASK_DEFAULT);
 861         mii_nway_restart(&dev->mii);
 862
 863         netif_dbg(dev, ifup, dev->net, "phy initialised successfully\n");
 864         return 0;
 865 }
 866
 867 static int smsc75xx_set_rx_max_frame_length(struct usbnet *dev, int size)
 868 {
 869         int ret = 0;
 870         u32 buf;
 871         bool rxenabled;
 872
 873         ret = smsc75xx_read_reg(dev, MAC_RX, &buf);
 874         if (ret < 0) {
 875                 netdev_warn(dev->net, "Failed to read MAC_RX: %d\n", ret);
 876                 return ret;
 877         }
 878
 879         rxenabled = ((buf & MAC_RX_RXEN) != 0);
 880
 881         if (rxenabled) {
 882                 buf &= ~MAC_RX_RXEN;
 883                 ret = smsc75xx_write_reg(dev, MAC_RX, buf);
 884                 if (ret < 0) {
 885                         netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
 886                         return ret;
 887                 }
 888         }
 889
 890         /* add 4 to size for FCS */
 891         buf &= ~MAC_RX_MAX_SIZE;
 892         buf |= (((size + 4) << MAC_RX_MAX_SIZE_SHIFT) & MAC_RX_MAX_SIZE);
 893
 894         ret = smsc75xx_write_reg(dev, MAC_RX, buf);
 895         if (ret < 0) {
 896                 netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
 897                 return ret;
 898         }
 899
 900         if (rxenabled) {
 901                 buf |= MAC_RX_RXEN;
 902                 ret = smsc75xx_write_reg(dev, MAC_RX, buf);
 903                 if (ret < 0) {
 904                         netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
 905                         return ret;
 906                 }
 907         }
 908
 909         return 0;
 910 }
 911
 912 static int smsc75xx_change_mtu(struct net_device *netdev, int new_mtu)
 913 {
 914         struct usbnet *dev = netdev_priv(netdev);
 915         int ret;
 916
 917         if (new_mtu > MAX_SINGLE_PACKET_SIZE)
 918                 return -EINVAL;
 919
 920         ret = smsc75xx_set_rx_max_frame_length(dev, new_mtu + ETH_HLEN);
 921         if (ret < 0) {
 922                 netdev_warn(dev->net, "Failed to set mac rx frame length\n");
 923                 return ret;
 924         }
 925
 926         return usbnet_change_mtu(netdev, new_mtu);
 927 }
 928
 929 /* Enable or disable Rx checksum offload engine */
 930 static int smsc75xx_set_features(struct net_device *netdev,
 931         netdev_features_t features)
 932 {
 933         struct usbnet *dev = netdev_priv(netdev);
 934         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 935         unsigned long flags;
 936         int ret;
 937
 938         spin_lock_irqsave(&pdata->rfe_ctl_lock, flags);
 939
 940         if (features & NETIF_F_RXCSUM)
 941                 pdata->rfe_ctl |= RFE_CTL_TCPUDP_CKM | RFE_CTL_IP_CKM;
 942         else
 943                 pdata->rfe_ctl &= ~(RFE_CTL_TCPUDP_CKM | RFE_CTL_IP_CKM);
 944
 945         spin_unlock_irqrestore(&pdata->rfe_ctl_lock, flags);
 946         /* it's racing here! */
 947
 948         ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
 949         if (ret < 0)
 950                 netdev_warn(dev->net, "Error writing RFE_CTL\n");
 951
 952         return ret;
 953 }
 954
 955 static int smsc75xx_wait_ready(struct usbnet *dev, int in_pm)
 956 {
 957         int timeout = 0;
 958
 959         do {
 960                 u32 buf;
 961                 int ret;
 962
 963                 ret = __smsc75xx_read_reg(dev, PMT_CTL, &buf, in_pm);
 964
 965                 if (ret < 0) {
 966                         netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret);
 967                         return ret;
 968                 }
 969
 970                 if (buf & PMT_CTL_DEV_RDY)
 971                         return 0;
 972
 973                 msleep(10);
 974                 timeout++;
 975         } while (timeout < 100);
 976
 977         netdev_warn(dev->net, "timeout waiting for device ready\n");
 978         return -EIO;
 979 }
 980
 981 static int smsc75xx_reset(struct usbnet *dev)
 982 {
 983         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 984         u32 buf;
 985         int ret = 0, timeout;
 986
 987         netif_dbg(dev, ifup, dev->net, "entering smsc75xx_reset\n");
 988
 989         ret = smsc75xx_wait_ready(dev, 0);
 990         if (ret < 0) {
 991                 netdev_warn(dev->net, "device not ready in smsc75xx_reset\n");
 992                 return ret;
 993         }
 994
 995         ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
 996         if (ret < 0) {
 997                 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
 998                 return ret;
 999         }
1000
1001         buf |= HW_CFG_LRST;
1002
1003         ret = smsc75xx_write_reg(dev, HW_CFG, buf);
1004         if (ret < 0) {
1005                 netdev_warn(dev->net, "Failed to write HW_CFG: %d\n", ret);
1006                 return ret;
1007         }
1008
1009         timeout = 0;
1010         do {
1011                 msleep(10);
1012                 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1013                 if (ret < 0) {
1014                         netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1015                         return ret;
1016                 }
1017                 timeout++;
1018         } while ((buf & HW_CFG_LRST) && (timeout < 100));
1019
1020         if (timeout >= 100) {
1021                 netdev_warn(dev->net, "timeout on completion of Lite Reset\n");
1022                 return -EIO;
1023         }
1024
1025         netif_dbg(dev, ifup, dev->net, "Lite reset complete, resetting PHY\n");
1026
1027         ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
1028         if (ret < 0) {
1029                 netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret);
1030                 return ret;
1031         }
1032
1033         buf |= PMT_CTL_PHY_RST;
1034
1035         ret = smsc75xx_write_reg(dev, PMT_CTL, buf);
1036         if (ret < 0) {
1037                 netdev_warn(dev->net, "Failed to write PMT_CTL: %d\n", ret);
1038                 return ret;
1039         }
1040
1041         timeout = 0;
1042         do {
1043                 msleep(10);
1044                 ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
1045                 if (ret < 0) {
1046                         netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret);
1047                         return ret;
1048                 }
1049                 timeout++;
1050         } while ((buf & PMT_CTL_PHY_RST) && (timeout < 100));
1051
1052         if (timeout >= 100) {
1053                 netdev_warn(dev->net, "timeout waiting for PHY Reset\n");
1054                 return -EIO;
1055         }
1056
1057         netif_dbg(dev, ifup, dev->net, "PHY reset complete\n");
1058
1059         ret = smsc75xx_set_mac_address(dev);
1060         if (ret < 0) {
1061                 netdev_warn(dev->net, "Failed to set mac address\n");
1062                 return ret;
1063         }
1064
1065         netif_dbg(dev, ifup, dev->net, "MAC Address: %pM\n",
1066                   dev->net->dev_addr);
1067
1068         ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1069         if (ret < 0) {
1070                 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1071                 return ret;
1072         }
1073
1074         netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG : 0x%08x\n",
1075                   buf);
1076
1077         buf |= HW_CFG_BIR;
1078
1079         ret = smsc75xx_write_reg(dev, HW_CFG, buf);
1080         if (ret < 0) {
1081                 netdev_warn(dev->net,  "Failed to write HW_CFG: %d\n", ret);
1082                 return ret;
1083         }
1084
1085         ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1086         if (ret < 0) {
1087                 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1088                 return ret;
1089         }
1090
1091         netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG after writing HW_CFG_BIR: 0x%08x\n",
1092                   buf);
1093
1094         if (!turbo_mode) {
1095                 buf = 0;
1096                 dev->rx_urb_size = MAX_SINGLE_PACKET_SIZE;
1097         } else if (dev->udev->speed == USB_SPEED_HIGH) {
1098                 buf = DEFAULT_HS_BURST_CAP_SIZE / HS_USB_PKT_SIZE;
1099                 dev->rx_urb_size = DEFAULT_HS_BURST_CAP_SIZE;
1100         } else {
1101                 buf = DEFAULT_FS_BURST_CAP_SIZE / FS_USB_PKT_SIZE;
1102                 dev->rx_urb_size = DEFAULT_FS_BURST_CAP_SIZE;
1103         }
1104
1105         netif_dbg(dev, ifup, dev->net, "rx_urb_size=%ld\n",
1106                   (ulong)dev->rx_urb_size);
1107
1108         ret = smsc75xx_write_reg(dev, BURST_CAP, buf);
1109         if (ret < 0) {
1110                 netdev_warn(dev->net, "Failed to write BURST_CAP: %d\n", ret);
1111                 return ret;
1112         }
1113
1114         ret = smsc75xx_read_reg(dev, BURST_CAP, &buf);
1115         if (ret < 0) {
1116                 netdev_warn(dev->net, "Failed to read BURST_CAP: %d\n", ret);
1117                 return ret;
1118         }
1119
1120         netif_dbg(dev, ifup, dev->net,
1121                   "Read Value from BURST_CAP after writing: 0x%08x\n", buf);
1122
1123         ret = smsc75xx_write_reg(dev, BULK_IN_DLY, DEFAULT_BULK_IN_DELAY);
1124         if (ret < 0) {
1125                 netdev_warn(dev->net, "Failed to write BULK_IN_DLY: %d\n", ret);
1126                 return ret;
1127         }
1128
1129         ret = smsc75xx_read_reg(dev, BULK_IN_DLY, &buf);
1130         if (ret < 0) {
1131                 netdev_warn(dev->net, "Failed to read BULK_IN_DLY: %d\n", ret);
1132                 return ret;
1133         }
1134
1135         netif_dbg(dev, ifup, dev->net,
1136                   "Read Value from BULK_IN_DLY after writing: 0x%08x\n", buf);
1137
1138         if (turbo_mode) {
1139                 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1140                 if (ret < 0) {
1141                         netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1142                         return ret;
1143                 }
1144
1145                 netif_dbg(dev, ifup, dev->net, "HW_CFG: 0x%08x\n", buf);
1146
1147                 buf |= (HW_CFG_MEF | HW_CFG_BCE);
1148
1149                 ret = smsc75xx_write_reg(dev, HW_CFG, buf);
1150                 if (ret < 0) {
1151                         netdev_warn(dev->net, "Failed to write HW_CFG: %d\n", ret);
1152                         return ret;
1153                 }
1154
1155                 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1156                 if (ret < 0) {
1157                         netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1158                         return ret;
1159                 }
1160
1161                 netif_dbg(dev, ifup, dev->net, "HW_CFG: 0x%08x\n", buf);
1162         }
1163
1164         /* set FIFO sizes */
1165         buf = (MAX_RX_FIFO_SIZE - 512) / 512;
1166         ret = smsc75xx_write_reg(dev, FCT_RX_FIFO_END, buf);
1167         if (ret < 0) {
1168                 netdev_warn(dev->net, "Failed to write FCT_RX_FIFO_END: %d\n", ret);
1169                 return ret;
1170         }
1171
1172         netif_dbg(dev, ifup, dev->net, "FCT_RX_FIFO_END set to 0x%08x\n", buf);
1173
1174         buf = (MAX_TX_FIFO_SIZE - 512) / 512;
1175         ret = smsc75xx_write_reg(dev, FCT_TX_FIFO_END, buf);
1176         if (ret < 0) {
1177                 netdev_warn(dev->net, "Failed to write FCT_TX_FIFO_END: %d\n", ret);
1178                 return ret;
1179         }
1180
1181         netif_dbg(dev, ifup, dev->net, "FCT_TX_FIFO_END set to 0x%08x\n", buf);
1182
1183         ret = smsc75xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL);
1184         if (ret < 0) {
1185                 netdev_warn(dev->net, "Failed to write INT_STS: %d\n", ret);
1186                 return ret;
1187         }
1188
1189         ret = smsc75xx_read_reg(dev, ID_REV, &buf);
1190         if (ret < 0) {
1191                 netdev_warn(dev->net, "Failed to read ID_REV: %d\n", ret);
1192                 return ret;
1193         }
1194
1195         netif_dbg(dev, ifup, dev->net, "ID_REV = 0x%08x\n", buf);
1196
1197         ret = smsc75xx_read_reg(dev, E2P_CMD, &buf);
1198         if (ret < 0) {
1199                 netdev_warn(dev->net, "Failed to read E2P_CMD: %d\n", ret);
1200                 return ret;
1201         }
1202
1203         /* only set default GPIO/LED settings if no EEPROM is detected */
1204         if (!(buf & E2P_CMD_LOADED)) {
1205                 ret = smsc75xx_read_reg(dev, LED_GPIO_CFG, &buf);
1206                 if (ret < 0) {
1207                         netdev_warn(dev->net, "Failed to read LED_GPIO_CFG: %d\n", ret);
1208                         return ret;
1209                 }
1210
1211                 buf &= ~(LED_GPIO_CFG_LED2_FUN_SEL | LED_GPIO_CFG_LED10_FUN_SEL);
1212                 buf |= LED_GPIO_CFG_LEDGPIO_EN | LED_GPIO_CFG_LED2_FUN_SEL;
1213
1214                 ret = smsc75xx_write_reg(dev, LED_GPIO_CFG, buf);
1215                 if (ret < 0) {
1216                         netdev_warn(dev->net, "Failed to write LED_GPIO_CFG: %d\n", ret);
1217                         return ret;
1218                 }
1219         }
1220
1221         ret = smsc75xx_write_reg(dev, FLOW, 0);
1222         if (ret < 0) {
1223                 netdev_warn(dev->net, "Failed to write FLOW: %d\n", ret);
1224                 return ret;
1225         }
1226
1227         ret = smsc75xx_write_reg(dev, FCT_FLOW, 0);
1228         if (ret < 0) {
1229                 netdev_warn(dev->net, "Failed to write FCT_FLOW: %d\n", ret);
1230                 return ret;
1231         }
1232
1233         /* Don't need rfe_ctl_lock during initialisation */
1234         ret = smsc75xx_read_reg(dev, RFE_CTL, &pdata->rfe_ctl);
1235         if (ret < 0) {
1236                 netdev_warn(dev->net, "Failed to read RFE_CTL: %d\n", ret);
1237                 return ret;
1238         }
1239
1240         pdata->rfe_ctl |= RFE_CTL_AB | RFE_CTL_DPF;
1241
1242         ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
1243         if (ret < 0) {
1244                 netdev_warn(dev->net, "Failed to write RFE_CTL: %d\n", ret);
1245                 return ret;
1246         }
1247
1248         ret = smsc75xx_read_reg(dev, RFE_CTL, &pdata->rfe_ctl);
1249         if (ret < 0) {
1250                 netdev_warn(dev->net, "Failed to read RFE_CTL: %d\n", ret);
1251                 return ret;
1252         }
1253
1254         netif_dbg(dev, ifup, dev->net, "RFE_CTL set to 0x%08x\n",
1255                   pdata->rfe_ctl);
1256
1257         /* Enable or disable checksum offload engines */
1258         smsc75xx_set_features(dev->net, dev->net->features);
1259
1260         smsc75xx_set_multicast(dev->net);
1261
1262         ret = smsc75xx_phy_initialize(dev);
1263         if (ret < 0) {
1264                 netdev_warn(dev->net, "Failed to initialize PHY: %d\n", ret);
1265                 return ret;
1266         }
1267
1268         ret = smsc75xx_read_reg(dev, INT_EP_CTL, &buf);
1269         if (ret < 0) {
1270                 netdev_warn(dev->net, "Failed to read INT_EP_CTL: %d\n", ret);
1271                 return ret;
1272         }
1273
1274         /* enable PHY interrupts */
1275         buf |= INT_ENP_PHY_INT;
1276
1277         ret = smsc75xx_write_reg(dev, INT_EP_CTL, buf);
1278         if (ret < 0) {
1279                 netdev_warn(dev->net, "Failed to write INT_EP_CTL: %d\n", ret);
1280                 return ret;
1281         }
1282
1283         /* allow mac to detect speed and duplex from phy */
1284         ret = smsc75xx_read_reg(dev, MAC_CR, &buf);
1285         if (ret < 0) {
1286                 netdev_warn(dev->net, "Failed to read MAC_CR: %d\n", ret);
1287                 return ret;
1288         }
1289
1290         buf |= (MAC_CR_ADD | MAC_CR_ASD);
1291         ret = smsc75xx_write_reg(dev, MAC_CR, buf);
1292         if (ret < 0) {
1293                 netdev_warn(dev->net, "Failed to write MAC_CR: %d\n", ret);
1294                 return ret;
1295         }
1296
1297         ret = smsc75xx_read_reg(dev, MAC_TX, &buf);
1298         if (ret < 0) {
1299                 netdev_warn(dev->net, "Failed to read MAC_TX: %d\n", ret);
1300                 return ret;
1301         }
1302
1303         buf |= MAC_TX_TXEN;
1304
1305         ret = smsc75xx_write_reg(dev, MAC_TX, buf);
1306         if (ret < 0) {
1307                 netdev_warn(dev->net, "Failed to write MAC_TX: %d\n", ret);
1308                 return ret;
1309         }
1310
1311         netif_dbg(dev, ifup, dev->net, "MAC_TX set to 0x%08x\n", buf);
1312
1313         ret = smsc75xx_read_reg(dev, FCT_TX_CTL, &buf);
1314         if (ret < 0) {
1315                 netdev_warn(dev->net, "Failed to read FCT_TX_CTL: %d\n", ret);
1316                 return ret;
1317         }
1318
1319         buf |= FCT_TX_CTL_EN;
1320
1321         ret = smsc75xx_write_reg(dev, FCT_TX_CTL, buf);
1322         if (ret < 0) {
1323                 netdev_warn(dev->net, "Failed to write FCT_TX_CTL: %d\n", ret);
1324                 return ret;
1325         }
1326
1327         netif_dbg(dev, ifup, dev->net, "FCT_TX_CTL set to 0x%08x\n", buf);
1328
1329         ret = smsc75xx_set_rx_max_frame_length(dev, dev->net->mtu + ETH_HLEN);
1330         if (ret < 0) {
1331                 netdev_warn(dev->net, "Failed to set max rx frame length\n");
1332                 return ret;
1333         }
1334
1335         ret = smsc75xx_read_reg(dev, MAC_RX, &buf);
1336         if (ret < 0) {
1337                 netdev_warn(dev->net, "Failed to read MAC_RX: %d\n", ret);
1338                 return ret;
1339         }
1340
1341         buf |= MAC_RX_RXEN;
1342
1343         ret = smsc75xx_write_reg(dev, MAC_RX, buf);
1344         if (ret < 0) {
1345                 netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
1346                 return ret;
1347         }
1348
1349         netif_dbg(dev, ifup, dev->net, "MAC_RX set to 0x%08x\n", buf);
1350
1351         ret = smsc75xx_read_reg(dev, FCT_RX_CTL, &buf);
1352         if (ret < 0) {
1353                 netdev_warn(dev->net, "Failed to read FCT_RX_CTL: %d\n", ret);
1354                 return ret;
1355         }
1356
1357         buf |= FCT_RX_CTL_EN;
1358
1359         ret = smsc75xx_write_reg(dev, FCT_RX_CTL, buf);
1360         if (ret < 0) {
1361                 netdev_warn(dev->net, "Failed to write FCT_RX_CTL: %d\n", ret);
1362                 return ret;
1363         }
1364
1365         netif_dbg(dev, ifup, dev->net, "FCT_RX_CTL set to 0x%08x\n", buf);
1366
1367         netif_dbg(dev, ifup, dev->net, "smsc75xx_reset, return 0\n");
1368         return 0;
1369 }
1370
1371 static const struct net_device_ops smsc75xx_netdev_ops = {
1372         .ndo_open               = usbnet_open,
1373         .ndo_stop               = usbnet_stop,
1374         .ndo_start_xmit         = usbnet_start_xmit,
1375         .ndo_tx_timeout         = usbnet_tx_timeout,
1376         .ndo_change_mtu         = smsc75xx_change_mtu,
1377         .ndo_set_mac_address    = eth_mac_addr,
1378         .ndo_validate_addr      = eth_validate_addr,
1379         .ndo_do_ioctl           = smsc75xx_ioctl,
1380         .ndo_set_rx_mode        = smsc75xx_set_multicast,
1381         .ndo_set_features       = smsc75xx_set_features,
1382 };
1383
1384 static int smsc75xx_bind(struct usbnet *dev, struct usb_interface *intf)
1385 {
1386         struct smsc75xx_priv *pdata = NULL;
1387         int ret;
1388
1389         printk(KERN_INFO SMSC_CHIPNAME " v" SMSC_DRIVER_VERSION "\n");
1390
1391         ret = usbnet_get_endpoints(dev, intf);
1392         if (ret < 0) {
1393                 netdev_warn(dev->net, "usbnet_get_endpoints failed: %d\n", ret);
1394                 return ret;
1395         }
1396
1397         dev->data[0] = (unsigned long)kzalloc(sizeof(struct smsc75xx_priv),
1398                                               GFP_KERNEL);
1399
1400         pdata = (struct smsc75xx_priv *)(dev->data[0]);
1401         if (!pdata)
1402                 return -ENOMEM;
1403
1404         pdata->dev = dev;
1405
1406         spin_lock_init(&pdata->rfe_ctl_lock);
1407         mutex_init(&pdata->dataport_mutex);
1408
1409         INIT_WORK(&pdata->set_multicast, smsc75xx_deferred_multicast_write);
1410
1411         if (DEFAULT_TX_CSUM_ENABLE)
1412                 dev->net->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
1413
1414         if (DEFAULT_RX_CSUM_ENABLE)
1415                 dev->net->features |= NETIF_F_RXCSUM;
1416
1417         dev->net->hw_features = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
1418                                 NETIF_F_RXCSUM;
1419
1420         ret = smsc75xx_wait_ready(dev, 0);
1421         if (ret < 0) {
1422                 netdev_warn(dev->net, "device not ready in smsc75xx_bind\n");
1423                 return ret;
1424         }
1425
1426         smsc75xx_init_mac_address(dev);
1427
1428         /* Init all registers */
1429         ret = smsc75xx_reset(dev);
1430         if (ret < 0) {
1431                 netdev_warn(dev->net, "smsc75xx_reset error %d\n", ret);
1432                 return ret;
1433         }
1434
1435         dev->net->netdev_ops = &smsc75xx_netdev_ops;
1436         dev->net->ethtool_ops = &smsc75xx_ethtool_ops;
1437         dev->net->flags |= IFF_MULTICAST;
1438         dev->net->hard_header_len += SMSC75XX_TX_OVERHEAD;
1439         dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len;
1440         return 0;
1441 }
1442
1443 static void smsc75xx_unbind(struct usbnet *dev, struct usb_interface *intf)
1444 {
1445         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1446         if (pdata) {
1447                 netif_dbg(dev, ifdown, dev->net, "free pdata\n");
1448                 kfree(pdata);
1449                 pdata = NULL;
1450                 dev->data[0] = 0;
1451         }
1452 }
1453
1454 static u16 smsc_crc(const u8 *buffer, size_t len)
1455 {
1456         return bitrev16(crc16(0xFFFF, buffer, len));
1457 }
1458
1459 static int smsc75xx_write_wuff(struct usbnet *dev, int filter, u32 wuf_cfg,
1460                                u32 wuf_mask1)
1461 {
1462         int cfg_base = WUF_CFGX + filter * 4;
1463         int mask_base = WUF_MASKX + filter * 16;
1464         int ret;
1465
1466         ret = smsc75xx_write_reg(dev, cfg_base, wuf_cfg);
1467         if (ret < 0) {
1468                 netdev_warn(dev->net, "Error writing WUF_CFGX\n");
1469                 return ret;
1470         }
1471
1472         ret = smsc75xx_write_reg(dev, mask_base, wuf_mask1);
1473         if (ret < 0) {
1474                 netdev_warn(dev->net, "Error writing WUF_MASKX\n");
1475                 return ret;
1476         }
1477
1478         ret = smsc75xx_write_reg(dev, mask_base + 4, 0);
1479         if (ret < 0) {
1480                 netdev_warn(dev->net, "Error writing WUF_MASKX\n");
1481                 return ret;
1482         }
1483
1484         ret = smsc75xx_write_reg(dev, mask_base + 8, 0);
1485         if (ret < 0) {
1486                 netdev_warn(dev->net, "Error writing WUF_MASKX\n");
1487                 return ret;
1488         }
1489
1490         ret = smsc75xx_write_reg(dev, mask_base + 12, 0);
1491         if (ret < 0) {
1492                 netdev_warn(dev->net, "Error writing WUF_MASKX\n");
1493                 return ret;
1494         }
1495
1496         return 0;
1497 }
1498
1499 static int smsc75xx_enter_suspend0(struct usbnet *dev)
1500 {
1501         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1502         u32 val;
1503         int ret;
1504
1505         ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1506         if (ret < 0) {
1507                 netdev_warn(dev->net, "Error reading PMT_CTL\n");
1508                 return ret;
1509         }
1510
1511         val &= (~(PMT_CTL_SUS_MODE | PMT_CTL_PHY_RST));
1512         val |= PMT_CTL_SUS_MODE_0 | PMT_CTL_WOL_EN | PMT_CTL_WUPS;
1513
1514         ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1515         if (ret < 0) {
1516                 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1517                 return ret;
1518         }
1519
1520         pdata->suspend_flags |= SUSPEND_SUSPEND0;
1521
1522         return 0;
1523 }
1524
1525 static int smsc75xx_enter_suspend1(struct usbnet *dev)
1526 {
1527         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1528         u32 val;
1529         int ret;
1530
1531         ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1532         if (ret < 0) {
1533                 netdev_warn(dev->net, "Error reading PMT_CTL\n");
1534                 return ret;
1535         }
1536
1537         val &= ~(PMT_CTL_SUS_MODE | PMT_CTL_WUPS | PMT_CTL_PHY_RST);
1538         val |= PMT_CTL_SUS_MODE_1;
1539
1540         ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1541         if (ret < 0) {
1542                 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1543                 return ret;
1544         }
1545
1546         /* clear wol status, enable energy detection */
1547         val &= ~PMT_CTL_WUPS;
1548         val |= (PMT_CTL_WUPS_ED | PMT_CTL_ED_EN);
1549
1550         ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1551         if (ret < 0) {
1552                 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1553                 return ret;
1554         }
1555
1556         pdata->suspend_flags |= SUSPEND_SUSPEND1;
1557
1558         return 0;
1559 }
1560
1561 static int smsc75xx_enter_suspend2(struct usbnet *dev)
1562 {
1563         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1564         u32 val;
1565         int ret;
1566
1567         ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1568         if (ret < 0) {
1569                 netdev_warn(dev->net, "Error reading PMT_CTL\n");
1570                 return ret;
1571         }
1572
1573         val &= ~(PMT_CTL_SUS_MODE | PMT_CTL_WUPS | PMT_CTL_PHY_RST);
1574         val |= PMT_CTL_SUS_MODE_2;
1575
1576         ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1577         if (ret < 0) {
1578                 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1579                 return ret;
1580         }
1581
1582         pdata->suspend_flags |= SUSPEND_SUSPEND2;
1583
1584         return 0;
1585 }
1586
1587 static int smsc75xx_enter_suspend3(struct usbnet *dev)
1588 {
1589         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1590         u32 val;
1591         int ret;
1592
1593         ret = smsc75xx_read_reg_nopm(dev, FCT_RX_CTL, &val);
1594         if (ret < 0) {
1595                 netdev_warn(dev->net, "Error reading FCT_RX_CTL\n");
1596                 return ret;
1597         }
1598
1599         if (val & FCT_RX_CTL_RXUSED) {
1600                 netdev_dbg(dev->net, "rx fifo not empty in autosuspend\n");
1601                 return -EBUSY;
1602         }
1603
1604         ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1605         if (ret < 0) {
1606                 netdev_warn(dev->net, "Error reading PMT_CTL\n");
1607                 return ret;
1608         }
1609
1610         val &= ~(PMT_CTL_SUS_MODE | PMT_CTL_WUPS | PMT_CTL_PHY_RST);
1611         val |= PMT_CTL_SUS_MODE_3 | PMT_CTL_RES_CLR_WKP_EN;
1612
1613         ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1614         if (ret < 0) {
1615                 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1616                 return ret;
1617         }
1618
1619         /* clear wol status */
1620         val &= ~PMT_CTL_WUPS;
1621         val |= PMT_CTL_WUPS_WOL;
1622
1623         ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1624         if (ret < 0) {
1625                 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1626                 return ret;
1627         }
1628
1629         pdata->suspend_flags |= SUSPEND_SUSPEND3;
1630
1631         return 0;
1632 }
1633
1634 static int smsc75xx_enable_phy_wakeup_interrupts(struct usbnet *dev, u16 mask)
1635 {
1636         struct mii_if_info *mii = &dev->mii;
1637         int ret;
1638
1639         netdev_dbg(dev->net, "enabling PHY wakeup interrupts\n");
1640
1641         /* read to clear */
1642         ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_SRC);
1643         if (ret < 0) {
1644                 netdev_warn(dev->net, "Error reading PHY_INT_SRC\n");
1645                 return ret;
1646         }
1647
1648         /* enable interrupt source */
1649         ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_MASK);
1650         if (ret < 0) {
1651                 netdev_warn(dev->net, "Error reading PHY_INT_MASK\n");
1652                 return ret;
1653         }
1654
1655         ret |= mask;
1656
1657         smsc75xx_mdio_write_nopm(dev->net, mii->phy_id, PHY_INT_MASK, ret);
1658
1659         return 0;
1660 }
1661
1662 static int smsc75xx_link_ok_nopm(struct usbnet *dev)
1663 {
1664         struct mii_if_info *mii = &dev->mii;
1665         int ret;
1666
1667         /* first, a dummy read, needed to latch some MII phys */
1668         ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR);
1669         if (ret < 0) {
1670                 netdev_warn(dev->net, "Error reading MII_BMSR\n");
1671                 return ret;
1672         }
1673
1674         ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR);
1675         if (ret < 0) {
1676                 netdev_warn(dev->net, "Error reading MII_BMSR\n");
1677                 return ret;
1678         }
1679
1680         return !!(ret & BMSR_LSTATUS);
1681 }
1682
1683 static int smsc75xx_autosuspend(struct usbnet *dev, u32 link_up)
1684 {
1685         int ret;
1686
1687         if (!netif_running(dev->net)) {
1688                 /* interface is ifconfig down so fully power down hw */
1689                 netdev_dbg(dev->net, "autosuspend entering SUSPEND2\n");
1690                 return smsc75xx_enter_suspend2(dev);
1691         }
1692
1693         if (!link_up) {
1694                 /* link is down so enter EDPD mode */
1695                 netdev_dbg(dev->net, "autosuspend entering SUSPEND1\n");
1696
1697                 /* enable PHY wakeup events for if cable is attached */
1698                 ret = smsc75xx_enable_phy_wakeup_interrupts(dev,
1699                         PHY_INT_MASK_ANEG_COMP);
1700                 if (ret < 0) {
1701                         netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1702                         return ret;
1703                 }
1704
1705                 netdev_info(dev->net, "entering SUSPEND1 mode\n");
1706                 return smsc75xx_enter_suspend1(dev);
1707         }
1708
1709         /* enable PHY wakeup events so we remote wakeup if cable is pulled */
1710         ret = smsc75xx_enable_phy_wakeup_interrupts(dev,
1711                 PHY_INT_MASK_LINK_DOWN);
1712         if (ret < 0) {
1713                 netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1714                 return ret;
1715         }
1716
1717         netdev_dbg(dev->net, "autosuspend entering SUSPEND3\n");
1718         return smsc75xx_enter_suspend3(dev);
1719 }
1720
1721 static int smsc75xx_suspend(struct usb_interface *intf, pm_message_t message)
1722 {
1723         struct usbnet *dev = usb_get_intfdata(intf);
1724         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1725         u32 val, link_up;
1726         int ret;
1727
1728         ret = usbnet_suspend(intf, message);
1729         if (ret < 0) {
1730                 netdev_warn(dev->net, "usbnet_suspend error\n");
1731                 return ret;
1732         }
1733
1734         if (pdata->suspend_flags) {
1735                 netdev_warn(dev->net, "error during last resume\n");
1736                 pdata->suspend_flags = 0;
1737         }
1738
1739         /* determine if link is up using only _nopm functions */
1740         link_up = smsc75xx_link_ok_nopm(dev);
1741
1742         if (message.event == PM_EVENT_AUTO_SUSPEND) {
1743                 ret = smsc75xx_autosuspend(dev, link_up);
1744                 goto done;
1745         }
1746
1747         /* if we get this far we're not autosuspending */
1748         /* if no wol options set, or if link is down and we're not waking on
1749          * PHY activity, enter lowest power SUSPEND2 mode
1750          */
1751         if (!(pdata->wolopts & SUPPORTED_WAKE) ||
1752                 !(link_up || (pdata->wolopts & WAKE_PHY))) {
1753                 netdev_info(dev->net, "entering SUSPEND2 mode\n");
1754
1755                 /* disable energy detect (link up) & wake up events */
1756                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1757                 if (ret < 0) {
1758                         netdev_warn(dev->net, "Error reading WUCSR\n");
1759                         goto done;
1760                 }
1761
1762                 val &= ~(WUCSR_MPEN | WUCSR_WUEN);
1763
1764                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1765                 if (ret < 0) {
1766                         netdev_warn(dev->net, "Error writing WUCSR\n");
1767                         goto done;
1768                 }
1769
1770                 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1771                 if (ret < 0) {
1772                         netdev_warn(dev->net, "Error reading PMT_CTL\n");
1773                         goto done;
1774                 }
1775
1776                 val &= ~(PMT_CTL_ED_EN | PMT_CTL_WOL_EN);
1777
1778                 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1779                 if (ret < 0) {
1780                         netdev_warn(dev->net, "Error writing PMT_CTL\n");
1781                         goto done;
1782                 }
1783
1784                 ret = smsc75xx_enter_suspend2(dev);
1785                 goto done;
1786         }
1787
1788         if (pdata->wolopts & WAKE_PHY) {
1789                 ret = smsc75xx_enable_phy_wakeup_interrupts(dev,
1790                         (PHY_INT_MASK_ANEG_COMP | PHY_INT_MASK_LINK_DOWN));
1791                 if (ret < 0) {
1792                         netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1793                         goto done;
1794                 }
1795
1796                 /* if link is down then configure EDPD and enter SUSPEND1,
1797                  * otherwise enter SUSPEND0 below
1798                  */
1799                 if (!link_up) {
1800                         struct mii_if_info *mii = &dev->mii;
1801                         netdev_info(dev->net, "entering SUSPEND1 mode\n");
1802
1803                         /* enable energy detect power-down mode */
1804                         ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id,
1805                                 PHY_MODE_CTRL_STS);
1806                         if (ret < 0) {
1807                                 netdev_warn(dev->net, "Error reading PHY_MODE_CTRL_STS\n");
1808                                 goto done;
1809                         }
1810
1811                         ret |= MODE_CTRL_STS_EDPWRDOWN;
1812
1813                         smsc75xx_mdio_write_nopm(dev->net, mii->phy_id,
1814                                 PHY_MODE_CTRL_STS, ret);
1815
1816                         /* enter SUSPEND1 mode */
1817                         ret = smsc75xx_enter_suspend1(dev);
1818                         goto done;
1819                 }
1820         }
1821
1822         if (pdata->wolopts & (WAKE_MCAST | WAKE_ARP)) {
1823                 int i, filter = 0;
1824
1825                 /* disable all filters */
1826                 for (i = 0; i < WUF_NUM; i++) {
1827                         ret = smsc75xx_write_reg_nopm(dev, WUF_CFGX + i * 4, 0);
1828                         if (ret < 0) {
1829                                 netdev_warn(dev->net, "Error writing WUF_CFGX\n");
1830                                 goto done;
1831                         }
1832                 }
1833
1834                 if (pdata->wolopts & WAKE_MCAST) {
1835                         const u8 mcast[] = {0x01, 0x00, 0x5E};
1836                         netdev_info(dev->net, "enabling multicast detection\n");
1837
1838                         val = WUF_CFGX_EN | WUF_CFGX_ATYPE_MULTICAST
1839                                 | smsc_crc(mcast, 3);
1840                         ret = smsc75xx_write_wuff(dev, filter++, val, 0x0007);
1841                         if (ret < 0) {
1842                                 netdev_warn(dev->net, "Error writing wakeup filter\n");
1843                                 goto done;
1844                         }
1845                 }
1846
1847                 if (pdata->wolopts & WAKE_ARP) {
1848                         const u8 arp[] = {0x08, 0x06};
1849                         netdev_info(dev->net, "enabling ARP detection\n");
1850
1851                         val = WUF_CFGX_EN | WUF_CFGX_ATYPE_ALL | (0x0C << 16)
1852                                 | smsc_crc(arp, 2);
1853                         ret = smsc75xx_write_wuff(dev, filter++, val, 0x0003);
1854                         if (ret < 0) {
1855                                 netdev_warn(dev->net, "Error writing wakeup filter\n");
1856                                 goto done;
1857                         }
1858                 }
1859
1860                 /* clear any pending pattern match packet status */
1861                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1862                 if (ret < 0) {
1863                         netdev_warn(dev->net, "Error reading WUCSR\n");
1864                         goto done;
1865                 }
1866
1867                 val |= WUCSR_WUFR;
1868
1869                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1870                 if (ret < 0) {
1871                         netdev_warn(dev->net, "Error writing WUCSR\n");
1872                         goto done;
1873                 }
1874
1875                 netdev_info(dev->net, "enabling packet match detection\n");
1876                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1877                 if (ret < 0) {
1878                         netdev_warn(dev->net, "Error reading WUCSR\n");
1879                         goto done;
1880                 }
1881
1882                 val |= WUCSR_WUEN;
1883
1884                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1885                 if (ret < 0) {
1886                         netdev_warn(dev->net, "Error writing WUCSR\n");
1887                         goto done;
1888                 }
1889         } else {
1890                 netdev_info(dev->net, "disabling packet match detection\n");
1891                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1892                 if (ret < 0) {
1893                         netdev_warn(dev->net, "Error reading WUCSR\n");
1894                         goto done;
1895                 }
1896
1897                 val &= ~WUCSR_WUEN;
1898
1899                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1900                 if (ret < 0) {
1901                         netdev_warn(dev->net, "Error writing WUCSR\n");
1902                         goto done;
1903                 }
1904         }
1905
1906         /* disable magic, bcast & unicast wakeup sources */
1907         ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1908         if (ret < 0) {
1909                 netdev_warn(dev->net, "Error reading WUCSR\n");
1910                 goto done;
1911         }
1912
1913         val &= ~(WUCSR_MPEN | WUCSR_BCST_EN | WUCSR_PFDA_EN);
1914
1915         ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1916         if (ret < 0) {
1917                 netdev_warn(dev->net, "Error writing WUCSR\n");
1918                 goto done;
1919         }
1920
1921         if (pdata->wolopts & WAKE_PHY) {
1922                 netdev_info(dev->net, "enabling PHY wakeup\n");
1923
1924                 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1925                 if (ret < 0) {
1926                         netdev_warn(dev->net, "Error reading PMT_CTL\n");
1927                         goto done;
1928                 }
1929
1930                 /* clear wol status, enable energy detection */
1931                 val &= ~PMT_CTL_WUPS;
1932                 val |= (PMT_CTL_WUPS_ED | PMT_CTL_ED_EN);
1933
1934                 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1935                 if (ret < 0) {
1936                         netdev_warn(dev->net, "Error writing PMT_CTL\n");
1937                         goto done;
1938                 }
1939         }
1940
1941         if (pdata->wolopts & WAKE_MAGIC) {
1942                 netdev_info(dev->net, "enabling magic packet wakeup\n");
1943                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1944                 if (ret < 0) {
1945                         netdev_warn(dev->net, "Error reading WUCSR\n");
1946                         goto done;
1947                 }
1948
1949                 /* clear any pending magic packet status */
1950                 val |= WUCSR_MPR | WUCSR_MPEN;
1951
1952                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1953                 if (ret < 0) {
1954                         netdev_warn(dev->net, "Error writing WUCSR\n");
1955                         goto done;
1956                 }
1957         }
1958
1959         if (pdata->wolopts & WAKE_BCAST) {
1960                 netdev_info(dev->net, "enabling broadcast detection\n");
1961                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1962                 if (ret < 0) {
1963                         netdev_warn(dev->net, "Error reading WUCSR\n");
1964                         goto done;
1965                 }
1966
1967                 val |= WUCSR_BCAST_FR | WUCSR_BCST_EN;
1968
1969                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1970                 if (ret < 0) {
1971                         netdev_warn(dev->net, "Error writing WUCSR\n");
1972                         goto done;
1973                 }
1974         }
1975
1976         if (pdata->wolopts & WAKE_UCAST) {
1977                 netdev_info(dev->net, "enabling unicast detection\n");
1978                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1979                 if (ret < 0) {
1980                         netdev_warn(dev->net, "Error reading WUCSR\n");
1981                         goto done;
1982                 }
1983
1984                 val |= WUCSR_WUFR | WUCSR_PFDA_EN;
1985
1986                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1987                 if (ret < 0) {
1988                         netdev_warn(dev->net, "Error writing WUCSR\n");
1989                         goto done;
1990                 }
1991         }
1992
1993         /* enable receiver to enable frame reception */
1994         ret = smsc75xx_read_reg_nopm(dev, MAC_RX, &val);
1995         if (ret < 0) {
1996                 netdev_warn(dev->net, "Failed to read MAC_RX: %d\n", ret);
1997                 goto done;
1998         }
1999
2000         val |= MAC_RX_RXEN;
2001
2002         ret = smsc75xx_write_reg_nopm(dev, MAC_RX, val);
2003         if (ret < 0) {
2004                 netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
2005                 goto done;
2006         }
2007
2008         /* some wol options are enabled, so enter SUSPEND0 */
2009         netdev_info(dev->net, "entering SUSPEND0 mode\n");
2010         ret = smsc75xx_enter_suspend0(dev);
2011
2012 done:
2013         /*
2014          * TODO: resume() might need to handle the suspend failure
2015          * in system sleep
2016          */
2017         if (ret && PMSG_IS_AUTO(message))
2018                 usbnet_resume(intf);
2019         return ret;
2020 }
2021
2022 static int smsc75xx_resume(struct usb_interface *intf)
2023 {
2024         struct usbnet *dev = usb_get_intfdata(intf);
2025         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
2026         u8 suspend_flags = pdata->suspend_flags;
2027         int ret;
2028         u32 val;
2029
2030         netdev_dbg(dev->net, "resume suspend_flags=0x%02x\n", suspend_flags);
2031
2032         /* do this first to ensure it's cleared even in error case */
2033         pdata->suspend_flags = 0;
2034
2035         if (suspend_flags & SUSPEND_ALLMODES) {
2036                 /* Disable wakeup sources */
2037                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
2038                 if (ret < 0) {
2039                         netdev_warn(dev->net, "Error reading WUCSR\n");
2040                         return ret;
2041                 }
2042
2043                 val &= ~(WUCSR_WUEN | WUCSR_MPEN | WUCSR_PFDA_EN
2044                         | WUCSR_BCST_EN);
2045
2046                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
2047                 if (ret < 0) {
2048                         netdev_warn(dev->net, "Error writing WUCSR\n");
2049                         return ret;
2050                 }
2051
2052                 /* clear wake-up status */
2053                 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
2054                 if (ret < 0) {
2055                         netdev_warn(dev->net, "Error reading PMT_CTL\n");
2056                         return ret;
2057                 }
2058
2059                 val &= ~PMT_CTL_WOL_EN;
2060                 val |= PMT_CTL_WUPS;
2061
2062                 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
2063                 if (ret < 0) {
2064                         netdev_warn(dev->net, "Error writing PMT_CTL\n");
2065                         return ret;
2066                 }
2067         }
2068
2069         if (suspend_flags & SUSPEND_SUSPEND2) {
2070                 netdev_info(dev->net, "resuming from SUSPEND2\n");
2071
2072                 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
2073                 if (ret < 0) {
2074                         netdev_warn(dev->net, "Error reading PMT_CTL\n");
2075                         return ret;
2076                 }
2077
2078                 val |= PMT_CTL_PHY_PWRUP;
2079
2080                 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
2081                 if (ret < 0) {
2082                         netdev_warn(dev->net, "Error writing PMT_CTL\n");
2083                         return ret;
2084                 }
2085         }
2086
2087         ret = smsc75xx_wait_ready(dev, 1);
2088         if (ret < 0) {
2089                 netdev_warn(dev->net, "device not ready in smsc75xx_resume\n");
2090                 return ret;
2091         }
2092
2093         return usbnet_resume(intf);
2094 }
2095
2096 static void smsc75xx_rx_csum_offload(struct usbnet *dev, struct sk_buff *skb,
2097                                      u32 rx_cmd_a, u32 rx_cmd_b)
2098 {
2099         if (!(dev->net->features & NETIF_F_RXCSUM) ||
2100             unlikely(rx_cmd_a & RX_CMD_A_LCSM)) {
2101                 skb->ip_summed = CHECKSUM_NONE;
2102         } else {
2103                 skb->csum = ntohs((u16)(rx_cmd_b >> RX_CMD_B_CSUM_SHIFT));
2104                 skb->ip_summed = CHECKSUM_COMPLETE;
2105         }
2106 }
2107
2108 static int smsc75xx_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
2109 {
2110         while (skb->len > 0) {
2111                 u32 rx_cmd_a, rx_cmd_b, align_count, size;
2112                 struct sk_buff *ax_skb;
2113                 unsigned char *packet;
2114
2115                 memcpy(&rx_cmd_a, skb->data, sizeof(rx_cmd_a));
2116                 le32_to_cpus(&rx_cmd_a);
2117                 skb_pull(skb, 4);
2118
2119                 memcpy(&rx_cmd_b, skb->data, sizeof(rx_cmd_b));
2120                 le32_to_cpus(&rx_cmd_b);
2121                 skb_pull(skb, 4 + RXW_PADDING);
2122
2123                 packet = skb->data;
2124
2125                 /* get the packet length */
2126                 size = (rx_cmd_a & RX_CMD_A_LEN) - RXW_PADDING;
2127                 align_count = (4 - ((size + RXW_PADDING) % 4)) % 4;
2128
2129                 if (unlikely(rx_cmd_a & RX_CMD_A_RED)) {
2130                         netif_dbg(dev, rx_err, dev->net,
2131                                   "Error rx_cmd_a=0x%08x\n", rx_cmd_a);
2132                         dev->net->stats.rx_errors++;
2133                         dev->net->stats.rx_dropped++;
2134
2135                         if (rx_cmd_a & RX_CMD_A_FCS)
2136                                 dev->net->stats.rx_crc_errors++;
2137                         else if (rx_cmd_a & (RX_CMD_A_LONG | RX_CMD_A_RUNT))
2138                                 dev->net->stats.rx_frame_errors++;
2139                 } else {
2140                         /* MAX_SINGLE_PACKET_SIZE + 4(CRC) + 2(COE) + 4(Vlan) */
2141                         if (unlikely(size > (MAX_SINGLE_PACKET_SIZE + ETH_HLEN + 12))) {
2142                                 netif_dbg(dev, rx_err, dev->net,
2143                                           "size err rx_cmd_a=0x%08x\n",
2144                                           rx_cmd_a);
2145                                 return 0;
2146                         }
2147
2148                         /* last frame in this batch */
2149                         if (skb->len == size) {
2150                                 smsc75xx_rx_csum_offload(dev, skb, rx_cmd_a,
2151                                         rx_cmd_b);
2152
2153                                 skb_trim(skb, skb->len - 4); /* remove fcs */
2154                                 skb->truesize = size + sizeof(struct sk_buff);
2155
2156                                 return 1;
2157                         }
2158
2159                         ax_skb = skb_clone(skb, GFP_ATOMIC);
2160                         if (unlikely(!ax_skb)) {
2161                                 netdev_warn(dev->net, "Error allocating skb\n");
2162                                 return 0;
2163                         }
2164
2165                         ax_skb->len = size;
2166                         ax_skb->data = packet;
2167                         skb_set_tail_pointer(ax_skb, size);
2168
2169                         smsc75xx_rx_csum_offload(dev, ax_skb, rx_cmd_a,
2170                                 rx_cmd_b);
2171
2172                         skb_trim(ax_skb, ax_skb->len - 4); /* remove fcs */
2173                         ax_skb->truesize = size + sizeof(struct sk_buff);
2174
2175                         usbnet_skb_return(dev, ax_skb);
2176                 }
2177
2178                 skb_pull(skb, size);
2179
2180                 /* padding bytes before the next frame starts */
2181                 if (skb->len)
2182                         skb_pull(skb, align_count);
2183         }
2184
2185         if (unlikely(skb->len < 0)) {
2186                 netdev_warn(dev->net, "invalid rx length<0 %d\n", skb->len);
2187                 return 0;
2188         }
2189
2190         return 1;
2191 }
2192
2193 static struct sk_buff *smsc75xx_tx_fixup(struct usbnet *dev,
2194                                          struct sk_buff *skb, gfp_t flags)
2195 {
2196         u32 tx_cmd_a, tx_cmd_b;
2197
2198         if (skb_headroom(skb) < SMSC75XX_TX_OVERHEAD) {
2199                 struct sk_buff *skb2 =
2200                         skb_copy_expand(skb, SMSC75XX_TX_OVERHEAD, 0, flags);
2201                 dev_kfree_skb_any(skb);
2202                 skb = skb2;
2203                 if (!skb)
2204                         return NULL;
2205         }
2206
2207         tx_cmd_a = (u32)(skb->len & TX_CMD_A_LEN) | TX_CMD_A_FCS;
2208
2209         if (skb->ip_summed == CHECKSUM_PARTIAL)
2210                 tx_cmd_a |= TX_CMD_A_IPE | TX_CMD_A_TPE;
2211
2212         if (skb_is_gso(skb)) {
2213                 u16 mss = max(skb_shinfo(skb)->gso_size, TX_MSS_MIN);
2214                 tx_cmd_b = (mss << TX_CMD_B_MSS_SHIFT) & TX_CMD_B_MSS;
2215
2216                 tx_cmd_a |= TX_CMD_A_LSO;
2217         } else {
2218                 tx_cmd_b = 0;
2219         }
2220
2221         skb_push(skb, 4);
2222         cpu_to_le32s(&tx_cmd_b);
2223         memcpy(skb->data, &tx_cmd_b, 4);
2224
2225         skb_push(skb, 4);
2226         cpu_to_le32s(&tx_cmd_a);
2227         memcpy(skb->data, &tx_cmd_a, 4);
2228
2229         return skb;
2230 }
2231
2232 static int smsc75xx_manage_power(struct usbnet *dev, int on)
2233 {
2234         dev->intf->needs_remote_wakeup = on;
2235         return 0;
2236 }
2237
2238 static const struct driver_info smsc75xx_info = {
2239         .description    = "smsc75xx USB 2.0 Gigabit Ethernet",
2240         .bind           = smsc75xx_bind,
2241         .unbind         = smsc75xx_unbind,
2242         .link_reset     = smsc75xx_link_reset,
2243         .reset          = smsc75xx_reset,
2244         .rx_fixup       = smsc75xx_rx_fixup,
2245         .tx_fixup       = smsc75xx_tx_fixup,
2246         .status         = smsc75xx_status,
2247         .manage_power   = smsc75xx_manage_power,
2248         .flags          = FLAG_ETHER | FLAG_SEND_ZLP | FLAG_LINK_INTR,
2249 };
2250
2251 static const struct usb_device_id products[] = {
2252         {
2253                 /* SMSC7500 USB Gigabit Ethernet Device */
2254                 USB_DEVICE(USB_VENDOR_ID_SMSC, USB_PRODUCT_ID_LAN7500),
2255                 .driver_info = (unsigned long) &smsc75xx_info,
2256         },
2257         {
2258                 /* SMSC7500 USB Gigabit Ethernet Device */
2259                 USB_DEVICE(USB_VENDOR_ID_SMSC, USB_PRODUCT_ID_LAN7505),
2260                 .driver_info = (unsigned long) &smsc75xx_info,
2261         },
2262         { },            /* END */
2263 };
2264 MODULE_DEVICE_TABLE(usb, products);
2265
2266 static struct usb_driver smsc75xx_driver = {
2267         .name           = SMSC_CHIPNAME,
2268         .id_table       = products,
2269         .probe          = usbnet_probe,
2270         .suspend        = smsc75xx_suspend,
2271         .resume         = smsc75xx_resume,
2272         .reset_resume   = smsc75xx_resume,
2273         .disconnect     = usbnet_disconnect,
2274         .disable_hub_initiated_lpm = 1,
2275         .supports_autosuspend = 1,
2276 };
2277
2278 module_usb_driver(smsc75xx_driver);
2279
2280 MODULE_AUTHOR("Nancy Lin");
2281 MODULE_AUTHOR("Steve Glendinning <steve.glendinning@shawell.net>");
2282 MODULE_DESCRIPTION("SMSC75XX USB 2.0 Gigabit Ethernet Devices");
2283 MODULE_LICENSE("GPL");