drivers/net/usb/smsc75xx.c

   1  /***************************************************************************
   2  *
   3  * Copyright (C) 2007-2010 SMSC
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License
   7  * as published by the Free Software Foundation; either version 2
   8  * of the License, or (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, see <http://www.gnu.org/licenses/>.
  17  *
  18  *****************************************************************************/
  19
  20 #include <linux/module.h>
  21 #include <linux/kmod.h>
  22 #include <linux/netdevice.h>
  23 #include <linux/etherdevice.h>
  24 #include <linux/ethtool.h>
  25 #include <linux/mii.h>
  26 #include <linux/usb.h>
  27 #include <linux/bitrev.h>
  28 #include <linux/crc16.h>
  29 #include <linux/crc32.h>
  30 #include <linux/usb/usbnet.h>
  31 #include <linux/slab.h>
  32 #include <linux/of_net.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         const u8 *mac_addr;
 766
 767         /* maybe the boot loader passed the MAC address in devicetree */
 768         mac_addr = of_get_mac_address(dev->udev->dev.of_node);
 769         if (mac_addr) {
 770                 memcpy(dev->net->dev_addr, mac_addr, ETH_ALEN);
 771                 return;
 772         }
 773
 774         /* try reading mac address from EEPROM */
 775         if (smsc75xx_read_eeprom(dev, EEPROM_MAC_OFFSET, ETH_ALEN,
 776                         dev->net->dev_addr) == 0) {
 777                 if (is_valid_ether_addr(dev->net->dev_addr)) {
 778                         /* eeprom values are valid so use them */
 779                         netif_dbg(dev, ifup, dev->net,
 780                                   "MAC address read from EEPROM\n");
 781                         return;
 782                 }
 783         }
 784
 785         /* no useful static MAC address found. generate a random one */
 786         eth_hw_addr_random(dev->net);
 787         netif_dbg(dev, ifup, dev->net, "MAC address set to eth_random_addr\n");
 788 }
 789
 790 static int smsc75xx_set_mac_address(struct usbnet *dev)
 791 {
 792         u32 addr_lo = dev->net->dev_addr[0] | dev->net->dev_addr[1] << 8 |
 793                 dev->net->dev_addr[2] << 16 | dev->net->dev_addr[3] << 24;
 794         u32 addr_hi = dev->net->dev_addr[4] | dev->net->dev_addr[5] << 8;
 795
 796         int ret = smsc75xx_write_reg(dev, RX_ADDRH, addr_hi);
 797         if (ret < 0) {
 798                 netdev_warn(dev->net, "Failed to write RX_ADDRH: %d\n", ret);
 799                 return ret;
 800         }
 801
 802         ret = smsc75xx_write_reg(dev, RX_ADDRL, addr_lo);
 803         if (ret < 0) {
 804                 netdev_warn(dev->net, "Failed to write RX_ADDRL: %d\n", ret);
 805                 return ret;
 806         }
 807
 808         addr_hi |= ADDR_FILTX_FB_VALID;
 809         ret = smsc75xx_write_reg(dev, ADDR_FILTX, addr_hi);
 810         if (ret < 0) {
 811                 netdev_warn(dev->net, "Failed to write ADDR_FILTX: %d\n", ret);
 812                 return ret;
 813         }
 814
 815         ret = smsc75xx_write_reg(dev, ADDR_FILTX + 4, addr_lo);
 816         if (ret < 0)
 817                 netdev_warn(dev->net, "Failed to write ADDR_FILTX+4: %d\n", ret);
 818
 819         return ret;
 820 }
 821
 822 static int smsc75xx_phy_initialize(struct usbnet *dev)
 823 {
 824         int bmcr, ret, timeout = 0;
 825
 826         /* Initialize MII structure */
 827         dev->mii.dev = dev->net;
 828         dev->mii.mdio_read = smsc75xx_mdio_read;
 829         dev->mii.mdio_write = smsc75xx_mdio_write;
 830         dev->mii.phy_id_mask = 0x1f;
 831         dev->mii.reg_num_mask = 0x1f;
 832         dev->mii.supports_gmii = 1;
 833         dev->mii.phy_id = SMSC75XX_INTERNAL_PHY_ID;
 834
 835         /* reset phy and wait for reset to complete */
 836         smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_BMCR, BMCR_RESET);
 837
 838         do {
 839                 msleep(10);
 840                 bmcr = smsc75xx_mdio_read(dev->net, dev->mii.phy_id, MII_BMCR);
 841                 if (bmcr < 0) {
 842                         netdev_warn(dev->net, "Error reading MII_BMCR\n");
 843                         return bmcr;
 844                 }
 845                 timeout++;
 846         } while ((bmcr & BMCR_RESET) && (timeout < 100));
 847
 848         if (timeout >= 100) {
 849                 netdev_warn(dev->net, "timeout on PHY Reset\n");
 850                 return -EIO;
 851         }
 852
 853         smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_ADVERTISE,
 854                 ADVERTISE_ALL | ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP |
 855                 ADVERTISE_PAUSE_ASYM);
 856         smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_CTRL1000,
 857                 ADVERTISE_1000FULL);
 858
 859         /* read and write to clear phy interrupt status */
 860         ret = smsc75xx_mdio_read(dev->net, dev->mii.phy_id, PHY_INT_SRC);
 861         if (ret < 0) {
 862                 netdev_warn(dev->net, "Error reading PHY_INT_SRC\n");
 863                 return ret;
 864         }
 865
 866         smsc75xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_SRC, 0xffff);
 867
 868         smsc75xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_MASK,
 869                 PHY_INT_MASK_DEFAULT);
 870         mii_nway_restart(&dev->mii);
 871
 872         netif_dbg(dev, ifup, dev->net, "phy initialised successfully\n");
 873         return 0;
 874 }
 875
 876 static int smsc75xx_set_rx_max_frame_length(struct usbnet *dev, int size)
 877 {
 878         int ret = 0;
 879         u32 buf;
 880         bool rxenabled;
 881
 882         ret = smsc75xx_read_reg(dev, MAC_RX, &buf);
 883         if (ret < 0) {
 884                 netdev_warn(dev->net, "Failed to read MAC_RX: %d\n", ret);
 885                 return ret;
 886         }
 887
 888         rxenabled = ((buf & MAC_RX_RXEN) != 0);
 889
 890         if (rxenabled) {
 891                 buf &= ~MAC_RX_RXEN;
 892                 ret = smsc75xx_write_reg(dev, MAC_RX, buf);
 893                 if (ret < 0) {
 894                         netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
 895                         return ret;
 896                 }
 897         }
 898
 899         /* add 4 to size for FCS */
 900         buf &= ~MAC_RX_MAX_SIZE;
 901         buf |= (((size + 4) << MAC_RX_MAX_SIZE_SHIFT) & MAC_RX_MAX_SIZE);
 902
 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         if (rxenabled) {
 910                 buf |= MAC_RX_RXEN;
 911                 ret = smsc75xx_write_reg(dev, MAC_RX, buf);
 912                 if (ret < 0) {
 913                         netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
 914                         return ret;
 915                 }
 916         }
 917
 918         return 0;
 919 }
 920
 921 static int smsc75xx_change_mtu(struct net_device *netdev, int new_mtu)
 922 {
 923         struct usbnet *dev = netdev_priv(netdev);
 924         int ret;
 925
 926         if (new_mtu > MAX_SINGLE_PACKET_SIZE)
 927                 return -EINVAL;
 928
 929         ret = smsc75xx_set_rx_max_frame_length(dev, new_mtu + ETH_HLEN);
 930         if (ret < 0) {
 931                 netdev_warn(dev->net, "Failed to set mac rx frame length\n");
 932                 return ret;
 933         }
 934
 935         return usbnet_change_mtu(netdev, new_mtu);
 936 }
 937
 938 /* Enable or disable Rx checksum offload engine */
 939 static int smsc75xx_set_features(struct net_device *netdev,
 940         netdev_features_t features)
 941 {
 942         struct usbnet *dev = netdev_priv(netdev);
 943         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 944         unsigned long flags;
 945         int ret;
 946
 947         spin_lock_irqsave(&pdata->rfe_ctl_lock, flags);
 948
 949         if (features & NETIF_F_RXCSUM)
 950                 pdata->rfe_ctl |= RFE_CTL_TCPUDP_CKM | RFE_CTL_IP_CKM;
 951         else
 952                 pdata->rfe_ctl &= ~(RFE_CTL_TCPUDP_CKM | RFE_CTL_IP_CKM);
 953
 954         spin_unlock_irqrestore(&pdata->rfe_ctl_lock, flags);
 955         /* it's racing here! */
 956
 957         ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
 958         if (ret < 0)
 959                 netdev_warn(dev->net, "Error writing RFE_CTL\n");
 960
 961         return ret;
 962 }
 963
 964 static int smsc75xx_wait_ready(struct usbnet *dev, int in_pm)
 965 {
 966         int timeout = 0;
 967
 968         do {
 969                 u32 buf;
 970                 int ret;
 971
 972                 ret = __smsc75xx_read_reg(dev, PMT_CTL, &buf, in_pm);
 973
 974                 if (ret < 0) {
 975                         netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret);
 976                         return ret;
 977                 }
 978
 979                 if (buf & PMT_CTL_DEV_RDY)
 980                         return 0;
 981
 982                 msleep(10);
 983                 timeout++;
 984         } while (timeout < 100);
 985
 986         netdev_warn(dev->net, "timeout waiting for device ready\n");
 987         return -EIO;
 988 }
 989
 990 static int smsc75xx_reset(struct usbnet *dev)
 991 {
 992         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 993         u32 buf;
 994         int ret = 0, timeout;
 995
 996         netif_dbg(dev, ifup, dev->net, "entering smsc75xx_reset\n");
 997
 998         ret = smsc75xx_wait_ready(dev, 0);
 999         if (ret < 0) {
1000                 netdev_warn(dev->net, "device not ready in smsc75xx_reset\n");
1001                 return ret;
1002         }
1003
1004         ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1005         if (ret < 0) {
1006                 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1007                 return ret;
1008         }
1009
1010         buf |= HW_CFG_LRST;
1011
1012         ret = smsc75xx_write_reg(dev, HW_CFG, buf);
1013         if (ret < 0) {
1014                 netdev_warn(dev->net, "Failed to write HW_CFG: %d\n", ret);
1015                 return ret;
1016         }
1017
1018         timeout = 0;
1019         do {
1020                 msleep(10);
1021                 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1022                 if (ret < 0) {
1023                         netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1024                         return ret;
1025                 }
1026                 timeout++;
1027         } while ((buf & HW_CFG_LRST) && (timeout < 100));
1028
1029         if (timeout >= 100) {
1030                 netdev_warn(dev->net, "timeout on completion of Lite Reset\n");
1031                 return -EIO;
1032         }
1033
1034         netif_dbg(dev, ifup, dev->net, "Lite reset complete, resetting PHY\n");
1035
1036         ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
1037         if (ret < 0) {
1038                 netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret);
1039                 return ret;
1040         }
1041
1042         buf |= PMT_CTL_PHY_RST;
1043
1044         ret = smsc75xx_write_reg(dev, PMT_CTL, buf);
1045         if (ret < 0) {
1046                 netdev_warn(dev->net, "Failed to write PMT_CTL: %d\n", ret);
1047                 return ret;
1048         }
1049
1050         timeout = 0;
1051         do {
1052                 msleep(10);
1053                 ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
1054                 if (ret < 0) {
1055                         netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret);
1056                         return ret;
1057                 }
1058                 timeout++;
1059         } while ((buf & PMT_CTL_PHY_RST) && (timeout < 100));
1060
1061         if (timeout >= 100) {
1062                 netdev_warn(dev->net, "timeout waiting for PHY Reset\n");
1063                 return -EIO;
1064         }
1065
1066         netif_dbg(dev, ifup, dev->net, "PHY reset complete\n");
1067
1068         ret = smsc75xx_set_mac_address(dev);
1069         if (ret < 0) {
1070                 netdev_warn(dev->net, "Failed to set mac address\n");
1071                 return ret;
1072         }
1073
1074         netif_dbg(dev, ifup, dev->net, "MAC Address: %pM\n",
1075                   dev->net->dev_addr);
1076
1077         ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1078         if (ret < 0) {
1079                 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1080                 return ret;
1081         }
1082
1083         netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG : 0x%08x\n",
1084                   buf);
1085
1086         buf |= HW_CFG_BIR;
1087
1088         ret = smsc75xx_write_reg(dev, HW_CFG, buf);
1089         if (ret < 0) {
1090                 netdev_warn(dev->net,  "Failed to write HW_CFG: %d\n", ret);
1091                 return ret;
1092         }
1093
1094         ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1095         if (ret < 0) {
1096                 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1097                 return ret;
1098         }
1099
1100         netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG after writing HW_CFG_BIR: 0x%08x\n",
1101                   buf);
1102
1103         if (!turbo_mode) {
1104                 buf = 0;
1105                 dev->rx_urb_size = MAX_SINGLE_PACKET_SIZE;
1106         } else if (dev->udev->speed == USB_SPEED_HIGH) {
1107                 buf = DEFAULT_HS_BURST_CAP_SIZE / HS_USB_PKT_SIZE;
1108                 dev->rx_urb_size = DEFAULT_HS_BURST_CAP_SIZE;
1109         } else {
1110                 buf = DEFAULT_FS_BURST_CAP_SIZE / FS_USB_PKT_SIZE;
1111                 dev->rx_urb_size = DEFAULT_FS_BURST_CAP_SIZE;
1112         }
1113
1114         netif_dbg(dev, ifup, dev->net, "rx_urb_size=%ld\n",
1115                   (ulong)dev->rx_urb_size);
1116
1117         ret = smsc75xx_write_reg(dev, BURST_CAP, buf);
1118         if (ret < 0) {
1119                 netdev_warn(dev->net, "Failed to write BURST_CAP: %d\n", ret);
1120                 return ret;
1121         }
1122
1123         ret = smsc75xx_read_reg(dev, BURST_CAP, &buf);
1124         if (ret < 0) {
1125                 netdev_warn(dev->net, "Failed to read BURST_CAP: %d\n", ret);
1126                 return ret;
1127         }
1128
1129         netif_dbg(dev, ifup, dev->net,
1130                   "Read Value from BURST_CAP after writing: 0x%08x\n", buf);
1131
1132         ret = smsc75xx_write_reg(dev, BULK_IN_DLY, DEFAULT_BULK_IN_DELAY);
1133         if (ret < 0) {
1134                 netdev_warn(dev->net, "Failed to write BULK_IN_DLY: %d\n", ret);
1135                 return ret;
1136         }
1137
1138         ret = smsc75xx_read_reg(dev, BULK_IN_DLY, &buf);
1139         if (ret < 0) {
1140                 netdev_warn(dev->net, "Failed to read BULK_IN_DLY: %d\n", ret);
1141                 return ret;
1142         }
1143
1144         netif_dbg(dev, ifup, dev->net,
1145                   "Read Value from BULK_IN_DLY after writing: 0x%08x\n", buf);
1146
1147         if (turbo_mode) {
1148                 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1149                 if (ret < 0) {
1150                         netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1151                         return ret;
1152                 }
1153
1154                 netif_dbg(dev, ifup, dev->net, "HW_CFG: 0x%08x\n", buf);
1155
1156                 buf |= (HW_CFG_MEF | HW_CFG_BCE);
1157
1158                 ret = smsc75xx_write_reg(dev, HW_CFG, buf);
1159                 if (ret < 0) {
1160                         netdev_warn(dev->net, "Failed to write HW_CFG: %d\n", ret);
1161                         return ret;
1162                 }
1163
1164                 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1165                 if (ret < 0) {
1166                         netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1167                         return ret;
1168                 }
1169
1170                 netif_dbg(dev, ifup, dev->net, "HW_CFG: 0x%08x\n", buf);
1171         }
1172
1173         /* set FIFO sizes */
1174         buf = (MAX_RX_FIFO_SIZE - 512) / 512;
1175         ret = smsc75xx_write_reg(dev, FCT_RX_FIFO_END, buf);
1176         if (ret < 0) {
1177                 netdev_warn(dev->net, "Failed to write FCT_RX_FIFO_END: %d\n", ret);
1178                 return ret;
1179         }
1180
1181         netif_dbg(dev, ifup, dev->net, "FCT_RX_FIFO_END set to 0x%08x\n", buf);
1182
1183         buf = (MAX_TX_FIFO_SIZE - 512) / 512;
1184         ret = smsc75xx_write_reg(dev, FCT_TX_FIFO_END, buf);
1185         if (ret < 0) {
1186                 netdev_warn(dev->net, "Failed to write FCT_TX_FIFO_END: %d\n", ret);
1187                 return ret;
1188         }
1189
1190         netif_dbg(dev, ifup, dev->net, "FCT_TX_FIFO_END set to 0x%08x\n", buf);
1191
1192         ret = smsc75xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL);
1193         if (ret < 0) {
1194                 netdev_warn(dev->net, "Failed to write INT_STS: %d\n", ret);
1195                 return ret;
1196         }
1197
1198         ret = smsc75xx_read_reg(dev, ID_REV, &buf);
1199         if (ret < 0) {
1200                 netdev_warn(dev->net, "Failed to read ID_REV: %d\n", ret);
1201                 return ret;
1202         }
1203
1204         netif_dbg(dev, ifup, dev->net, "ID_REV = 0x%08x\n", buf);
1205
1206         ret = smsc75xx_read_reg(dev, E2P_CMD, &buf);
1207         if (ret < 0) {
1208                 netdev_warn(dev->net, "Failed to read E2P_CMD: %d\n", ret);
1209                 return ret;
1210         }
1211
1212         /* only set default GPIO/LED settings if no EEPROM is detected */
1213         if (!(buf & E2P_CMD_LOADED)) {
1214                 ret = smsc75xx_read_reg(dev, LED_GPIO_CFG, &buf);
1215                 if (ret < 0) {
1216                         netdev_warn(dev->net, "Failed to read LED_GPIO_CFG: %d\n", ret);
1217                         return ret;
1218                 }
1219
1220                 buf &= ~(LED_GPIO_CFG_LED2_FUN_SEL | LED_GPIO_CFG_LED10_FUN_SEL);
1221                 buf |= LED_GPIO_CFG_LEDGPIO_EN | LED_GPIO_CFG_LED2_FUN_SEL;
1222
1223                 ret = smsc75xx_write_reg(dev, LED_GPIO_CFG, buf);
1224                 if (ret < 0) {
1225                         netdev_warn(dev->net, "Failed to write LED_GPIO_CFG: %d\n", ret);
1226                         return ret;
1227                 }
1228         }
1229
1230         ret = smsc75xx_write_reg(dev, FLOW, 0);
1231         if (ret < 0) {
1232                 netdev_warn(dev->net, "Failed to write FLOW: %d\n", ret);
1233                 return ret;
1234         }
1235
1236         ret = smsc75xx_write_reg(dev, FCT_FLOW, 0);
1237         if (ret < 0) {
1238                 netdev_warn(dev->net, "Failed to write FCT_FLOW: %d\n", ret);
1239                 return ret;
1240         }
1241
1242         /* Don't need rfe_ctl_lock during initialisation */
1243         ret = smsc75xx_read_reg(dev, RFE_CTL, &pdata->rfe_ctl);
1244         if (ret < 0) {
1245                 netdev_warn(dev->net, "Failed to read RFE_CTL: %d\n", ret);
1246                 return ret;
1247         }
1248
1249         pdata->rfe_ctl |= RFE_CTL_AB | RFE_CTL_DPF;
1250
1251         ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
1252         if (ret < 0) {
1253                 netdev_warn(dev->net, "Failed to write RFE_CTL: %d\n", ret);
1254                 return ret;
1255         }
1256
1257         ret = smsc75xx_read_reg(dev, RFE_CTL, &pdata->rfe_ctl);
1258         if (ret < 0) {
1259                 netdev_warn(dev->net, "Failed to read RFE_CTL: %d\n", ret);
1260                 return ret;
1261         }
1262
1263         netif_dbg(dev, ifup, dev->net, "RFE_CTL set to 0x%08x\n",
1264                   pdata->rfe_ctl);
1265
1266         /* Enable or disable checksum offload engines */
1267         smsc75xx_set_features(dev->net, dev->net->features);
1268
1269         smsc75xx_set_multicast(dev->net);
1270
1271         ret = smsc75xx_phy_initialize(dev);
1272         if (ret < 0) {
1273                 netdev_warn(dev->net, "Failed to initialize PHY: %d\n", ret);
1274                 return ret;
1275         }
1276
1277         ret = smsc75xx_read_reg(dev, INT_EP_CTL, &buf);
1278         if (ret < 0) {
1279                 netdev_warn(dev->net, "Failed to read INT_EP_CTL: %d\n", ret);
1280                 return ret;
1281         }
1282
1283         /* enable PHY interrupts */
1284         buf |= INT_ENP_PHY_INT;
1285
1286         ret = smsc75xx_write_reg(dev, INT_EP_CTL, buf);
1287         if (ret < 0) {
1288                 netdev_warn(dev->net, "Failed to write INT_EP_CTL: %d\n", ret);
1289                 return ret;
1290         }
1291
1292         /* allow mac to detect speed and duplex from phy */
1293         ret = smsc75xx_read_reg(dev, MAC_CR, &buf);
1294         if (ret < 0) {
1295                 netdev_warn(dev->net, "Failed to read MAC_CR: %d\n", ret);
1296                 return ret;
1297         }
1298
1299         buf |= (MAC_CR_ADD | MAC_CR_ASD);
1300         ret = smsc75xx_write_reg(dev, MAC_CR, buf);
1301         if (ret < 0) {
1302                 netdev_warn(dev->net, "Failed to write MAC_CR: %d\n", ret);
1303                 return ret;
1304         }
1305
1306         ret = smsc75xx_read_reg(dev, MAC_TX, &buf);
1307         if (ret < 0) {
1308                 netdev_warn(dev->net, "Failed to read MAC_TX: %d\n", ret);
1309                 return ret;
1310         }
1311
1312         buf |= MAC_TX_TXEN;
1313
1314         ret = smsc75xx_write_reg(dev, MAC_TX, buf);
1315         if (ret < 0) {
1316                 netdev_warn(dev->net, "Failed to write MAC_TX: %d\n", ret);
1317                 return ret;
1318         }
1319
1320         netif_dbg(dev, ifup, dev->net, "MAC_TX set to 0x%08x\n", buf);
1321
1322         ret = smsc75xx_read_reg(dev, FCT_TX_CTL, &buf);
1323         if (ret < 0) {
1324                 netdev_warn(dev->net, "Failed to read FCT_TX_CTL: %d\n", ret);
1325                 return ret;
1326         }
1327
1328         buf |= FCT_TX_CTL_EN;
1329
1330         ret = smsc75xx_write_reg(dev, FCT_TX_CTL, buf);
1331         if (ret < 0) {
1332                 netdev_warn(dev->net, "Failed to write FCT_TX_CTL: %d\n", ret);
1333                 return ret;
1334         }
1335
1336         netif_dbg(dev, ifup, dev->net, "FCT_TX_CTL set to 0x%08x\n", buf);
1337
1338         ret = smsc75xx_set_rx_max_frame_length(dev, dev->net->mtu + ETH_HLEN);
1339         if (ret < 0) {
1340                 netdev_warn(dev->net, "Failed to set max rx frame length\n");
1341                 return ret;
1342         }
1343
1344         ret = smsc75xx_read_reg(dev, MAC_RX, &buf);
1345         if (ret < 0) {
1346                 netdev_warn(dev->net, "Failed to read MAC_RX: %d\n", ret);
1347                 return ret;
1348         }
1349
1350         buf |= MAC_RX_RXEN;
1351
1352         ret = smsc75xx_write_reg(dev, MAC_RX, buf);
1353         if (ret < 0) {
1354                 netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
1355                 return ret;
1356         }
1357
1358         netif_dbg(dev, ifup, dev->net, "MAC_RX set to 0x%08x\n", buf);
1359
1360         ret = smsc75xx_read_reg(dev, FCT_RX_CTL, &buf);
1361         if (ret < 0) {
1362                 netdev_warn(dev->net, "Failed to read FCT_RX_CTL: %d\n", ret);
1363                 return ret;
1364         }
1365
1366         buf |= FCT_RX_CTL_EN;
1367
1368         ret = smsc75xx_write_reg(dev, FCT_RX_CTL, buf);
1369         if (ret < 0) {
1370                 netdev_warn(dev->net, "Failed to write FCT_RX_CTL: %d\n", ret);
1371                 return ret;
1372         }
1373
1374         netif_dbg(dev, ifup, dev->net, "FCT_RX_CTL set to 0x%08x\n", buf);
1375
1376         netif_dbg(dev, ifup, dev->net, "smsc75xx_reset, return 0\n");
1377         return 0;
1378 }
1379
1380 static const struct net_device_ops smsc75xx_netdev_ops = {
1381         .ndo_open               = usbnet_open,
1382         .ndo_stop               = usbnet_stop,
1383         .ndo_start_xmit         = usbnet_start_xmit,
1384         .ndo_tx_timeout         = usbnet_tx_timeout,
1385         .ndo_change_mtu         = smsc75xx_change_mtu,
1386         .ndo_set_mac_address    = eth_mac_addr,
1387         .ndo_validate_addr      = eth_validate_addr,
1388         .ndo_do_ioctl           = smsc75xx_ioctl,
1389         .ndo_set_rx_mode        = smsc75xx_set_multicast,
1390         .ndo_set_features       = smsc75xx_set_features,
1391 };
1392
1393 static int smsc75xx_bind(struct usbnet *dev, struct usb_interface *intf)
1394 {
1395         struct smsc75xx_priv *pdata = NULL;
1396         int ret;
1397
1398         printk(KERN_INFO SMSC_CHIPNAME " v" SMSC_DRIVER_VERSION "\n");
1399
1400         ret = usbnet_get_endpoints(dev, intf);
1401         if (ret < 0) {
1402                 netdev_warn(dev->net, "usbnet_get_endpoints failed: %d\n", ret);
1403                 return ret;
1404         }
1405
1406         dev->data[0] = (unsigned long)kzalloc(sizeof(struct smsc75xx_priv),
1407                                               GFP_KERNEL);
1408
1409         pdata = (struct smsc75xx_priv *)(dev->data[0]);
1410         if (!pdata)
1411                 return -ENOMEM;
1412
1413         pdata->dev = dev;
1414
1415         spin_lock_init(&pdata->rfe_ctl_lock);
1416         mutex_init(&pdata->dataport_mutex);
1417
1418         INIT_WORK(&pdata->set_multicast, smsc75xx_deferred_multicast_write);
1419
1420         if (DEFAULT_TX_CSUM_ENABLE)
1421                 dev->net->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
1422
1423         if (DEFAULT_RX_CSUM_ENABLE)
1424                 dev->net->features |= NETIF_F_RXCSUM;
1425
1426         dev->net->hw_features = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
1427                                 NETIF_F_RXCSUM;
1428
1429         ret = smsc75xx_wait_ready(dev, 0);
1430         if (ret < 0) {
1431                 netdev_warn(dev->net, "device not ready in smsc75xx_bind\n");
1432                 return ret;
1433         }
1434
1435         smsc75xx_init_mac_address(dev);
1436
1437         /* Init all registers */
1438         ret = smsc75xx_reset(dev);
1439         if (ret < 0) {
1440                 netdev_warn(dev->net, "smsc75xx_reset error %d\n", ret);
1441                 return ret;
1442         }
1443
1444         dev->net->netdev_ops = &smsc75xx_netdev_ops;
1445         dev->net->ethtool_ops = &smsc75xx_ethtool_ops;
1446         dev->net->flags |= IFF_MULTICAST;
1447         dev->net->hard_header_len += SMSC75XX_TX_OVERHEAD;
1448         dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len;
1449         return 0;
1450 }
1451
1452 static void smsc75xx_unbind(struct usbnet *dev, struct usb_interface *intf)
1453 {
1454         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1455         if (pdata) {
1456                 netif_dbg(dev, ifdown, dev->net, "free pdata\n");
1457                 kfree(pdata);
1458                 pdata = NULL;
1459                 dev->data[0] = 0;
1460         }
1461 }
1462
1463 static u16 smsc_crc(const u8 *buffer, size_t len)
1464 {
1465         return bitrev16(crc16(0xFFFF, buffer, len));
1466 }
1467
1468 static int smsc75xx_write_wuff(struct usbnet *dev, int filter, u32 wuf_cfg,
1469                                u32 wuf_mask1)
1470 {
1471         int cfg_base = WUF_CFGX + filter * 4;
1472         int mask_base = WUF_MASKX + filter * 16;
1473         int ret;
1474
1475         ret = smsc75xx_write_reg(dev, cfg_base, wuf_cfg);
1476         if (ret < 0) {
1477                 netdev_warn(dev->net, "Error writing WUF_CFGX\n");
1478                 return ret;
1479         }
1480
1481         ret = smsc75xx_write_reg(dev, mask_base, wuf_mask1);
1482         if (ret < 0) {
1483                 netdev_warn(dev->net, "Error writing WUF_MASKX\n");
1484                 return ret;
1485         }
1486
1487         ret = smsc75xx_write_reg(dev, mask_base + 4, 0);
1488         if (ret < 0) {
1489                 netdev_warn(dev->net, "Error writing WUF_MASKX\n");
1490                 return ret;
1491         }
1492
1493         ret = smsc75xx_write_reg(dev, mask_base + 8, 0);
1494         if (ret < 0) {
1495                 netdev_warn(dev->net, "Error writing WUF_MASKX\n");
1496                 return ret;
1497         }
1498
1499         ret = smsc75xx_write_reg(dev, mask_base + 12, 0);
1500         if (ret < 0) {
1501                 netdev_warn(dev->net, "Error writing WUF_MASKX\n");
1502                 return ret;
1503         }
1504
1505         return 0;
1506 }
1507
1508 static int smsc75xx_enter_suspend0(struct usbnet *dev)
1509 {
1510         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1511         u32 val;
1512         int ret;
1513
1514         ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1515         if (ret < 0) {
1516                 netdev_warn(dev->net, "Error reading PMT_CTL\n");
1517                 return ret;
1518         }
1519
1520         val &= (~(PMT_CTL_SUS_MODE | PMT_CTL_PHY_RST));
1521         val |= PMT_CTL_SUS_MODE_0 | PMT_CTL_WOL_EN | PMT_CTL_WUPS;
1522
1523         ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1524         if (ret < 0) {
1525                 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1526                 return ret;
1527         }
1528
1529         pdata->suspend_flags |= SUSPEND_SUSPEND0;
1530
1531         return 0;
1532 }
1533
1534 static int smsc75xx_enter_suspend1(struct usbnet *dev)
1535 {
1536         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1537         u32 val;
1538         int ret;
1539
1540         ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1541         if (ret < 0) {
1542                 netdev_warn(dev->net, "Error reading PMT_CTL\n");
1543                 return ret;
1544         }
1545
1546         val &= ~(PMT_CTL_SUS_MODE | PMT_CTL_WUPS | PMT_CTL_PHY_RST);
1547         val |= PMT_CTL_SUS_MODE_1;
1548
1549         ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1550         if (ret < 0) {
1551                 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1552                 return ret;
1553         }
1554
1555         /* clear wol status, enable energy detection */
1556         val &= ~PMT_CTL_WUPS;
1557         val |= (PMT_CTL_WUPS_ED | PMT_CTL_ED_EN);
1558
1559         ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1560         if (ret < 0) {
1561                 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1562                 return ret;
1563         }
1564
1565         pdata->suspend_flags |= SUSPEND_SUSPEND1;
1566
1567         return 0;
1568 }
1569
1570 static int smsc75xx_enter_suspend2(struct usbnet *dev)
1571 {
1572         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1573         u32 val;
1574         int ret;
1575
1576         ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1577         if (ret < 0) {
1578                 netdev_warn(dev->net, "Error reading PMT_CTL\n");
1579                 return ret;
1580         }
1581
1582         val &= ~(PMT_CTL_SUS_MODE | PMT_CTL_WUPS | PMT_CTL_PHY_RST);
1583         val |= PMT_CTL_SUS_MODE_2;
1584
1585         ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1586         if (ret < 0) {
1587                 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1588                 return ret;
1589         }
1590
1591         pdata->suspend_flags |= SUSPEND_SUSPEND2;
1592
1593         return 0;
1594 }
1595
1596 static int smsc75xx_enter_suspend3(struct usbnet *dev)
1597 {
1598         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1599         u32 val;
1600         int ret;
1601
1602         ret = smsc75xx_read_reg_nopm(dev, FCT_RX_CTL, &val);
1603         if (ret < 0) {
1604                 netdev_warn(dev->net, "Error reading FCT_RX_CTL\n");
1605                 return ret;
1606         }
1607
1608         if (val & FCT_RX_CTL_RXUSED) {
1609                 netdev_dbg(dev->net, "rx fifo not empty in autosuspend\n");
1610                 return -EBUSY;
1611         }
1612
1613         ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1614         if (ret < 0) {
1615                 netdev_warn(dev->net, "Error reading PMT_CTL\n");
1616                 return ret;
1617         }
1618
1619         val &= ~(PMT_CTL_SUS_MODE | PMT_CTL_WUPS | PMT_CTL_PHY_RST);
1620         val |= PMT_CTL_SUS_MODE_3 | PMT_CTL_RES_CLR_WKP_EN;
1621
1622         ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1623         if (ret < 0) {
1624                 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1625                 return ret;
1626         }
1627
1628         /* clear wol status */
1629         val &= ~PMT_CTL_WUPS;
1630         val |= PMT_CTL_WUPS_WOL;
1631
1632         ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1633         if (ret < 0) {
1634                 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1635                 return ret;
1636         }
1637
1638         pdata->suspend_flags |= SUSPEND_SUSPEND3;
1639
1640         return 0;
1641 }
1642
1643 static int smsc75xx_enable_phy_wakeup_interrupts(struct usbnet *dev, u16 mask)
1644 {
1645         struct mii_if_info *mii = &dev->mii;
1646         int ret;
1647
1648         netdev_dbg(dev->net, "enabling PHY wakeup interrupts\n");
1649
1650         /* read to clear */
1651         ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_SRC);
1652         if (ret < 0) {
1653                 netdev_warn(dev->net, "Error reading PHY_INT_SRC\n");
1654                 return ret;
1655         }
1656
1657         /* enable interrupt source */
1658         ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_MASK);
1659         if (ret < 0) {
1660                 netdev_warn(dev->net, "Error reading PHY_INT_MASK\n");
1661                 return ret;
1662         }
1663
1664         ret |= mask;
1665
1666         smsc75xx_mdio_write_nopm(dev->net, mii->phy_id, PHY_INT_MASK, ret);
1667
1668         return 0;
1669 }
1670
1671 static int smsc75xx_link_ok_nopm(struct usbnet *dev)
1672 {
1673         struct mii_if_info *mii = &dev->mii;
1674         int ret;
1675
1676         /* first, a dummy read, needed to latch some MII phys */
1677         ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR);
1678         if (ret < 0) {
1679                 netdev_warn(dev->net, "Error reading MII_BMSR\n");
1680                 return ret;
1681         }
1682
1683         ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR);
1684         if (ret < 0) {
1685                 netdev_warn(dev->net, "Error reading MII_BMSR\n");
1686                 return ret;
1687         }
1688
1689         return !!(ret & BMSR_LSTATUS);
1690 }
1691
1692 static int smsc75xx_autosuspend(struct usbnet *dev, u32 link_up)
1693 {
1694         int ret;
1695
1696         if (!netif_running(dev->net)) {
1697                 /* interface is ifconfig down so fully power down hw */
1698                 netdev_dbg(dev->net, "autosuspend entering SUSPEND2\n");
1699                 return smsc75xx_enter_suspend2(dev);
1700         }
1701
1702         if (!link_up) {
1703                 /* link is down so enter EDPD mode */
1704                 netdev_dbg(dev->net, "autosuspend entering SUSPEND1\n");
1705
1706                 /* enable PHY wakeup events for if cable is attached */
1707                 ret = smsc75xx_enable_phy_wakeup_interrupts(dev,
1708                         PHY_INT_MASK_ANEG_COMP);
1709                 if (ret < 0) {
1710                         netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1711                         return ret;
1712                 }
1713
1714                 netdev_info(dev->net, "entering SUSPEND1 mode\n");
1715                 return smsc75xx_enter_suspend1(dev);
1716         }
1717
1718         /* enable PHY wakeup events so we remote wakeup if cable is pulled */
1719         ret = smsc75xx_enable_phy_wakeup_interrupts(dev,
1720                 PHY_INT_MASK_LINK_DOWN);
1721         if (ret < 0) {
1722                 netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1723                 return ret;
1724         }
1725
1726         netdev_dbg(dev->net, "autosuspend entering SUSPEND3\n");
1727         return smsc75xx_enter_suspend3(dev);
1728 }
1729
1730 static int smsc75xx_suspend(struct usb_interface *intf, pm_message_t message)
1731 {
1732         struct usbnet *dev = usb_get_intfdata(intf);
1733         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1734         u32 val, link_up;
1735         int ret;
1736
1737         ret = usbnet_suspend(intf, message);
1738         if (ret < 0) {
1739                 netdev_warn(dev->net, "usbnet_suspend error\n");
1740                 return ret;
1741         }
1742
1743         if (pdata->suspend_flags) {
1744                 netdev_warn(dev->net, "error during last resume\n");
1745                 pdata->suspend_flags = 0;
1746         }
1747
1748         /* determine if link is up using only _nopm functions */
1749         link_up = smsc75xx_link_ok_nopm(dev);
1750
1751         if (message.event == PM_EVENT_AUTO_SUSPEND) {
1752                 ret = smsc75xx_autosuspend(dev, link_up);
1753                 goto done;
1754         }
1755
1756         /* if we get this far we're not autosuspending */
1757         /* if no wol options set, or if link is down and we're not waking on
1758          * PHY activity, enter lowest power SUSPEND2 mode
1759          */
1760         if (!(pdata->wolopts & SUPPORTED_WAKE) ||
1761                 !(link_up || (pdata->wolopts & WAKE_PHY))) {
1762                 netdev_info(dev->net, "entering SUSPEND2 mode\n");
1763
1764                 /* disable energy detect (link up) & wake up events */
1765                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1766                 if (ret < 0) {
1767                         netdev_warn(dev->net, "Error reading WUCSR\n");
1768                         goto done;
1769                 }
1770
1771                 val &= ~(WUCSR_MPEN | WUCSR_WUEN);
1772
1773                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1774                 if (ret < 0) {
1775                         netdev_warn(dev->net, "Error writing WUCSR\n");
1776                         goto done;
1777                 }
1778
1779                 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1780                 if (ret < 0) {
1781                         netdev_warn(dev->net, "Error reading PMT_CTL\n");
1782                         goto done;
1783                 }
1784
1785                 val &= ~(PMT_CTL_ED_EN | PMT_CTL_WOL_EN);
1786
1787                 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1788                 if (ret < 0) {
1789                         netdev_warn(dev->net, "Error writing PMT_CTL\n");
1790                         goto done;
1791                 }
1792
1793                 ret = smsc75xx_enter_suspend2(dev);
1794                 goto done;
1795         }
1796
1797         if (pdata->wolopts & WAKE_PHY) {
1798                 ret = smsc75xx_enable_phy_wakeup_interrupts(dev,
1799                         (PHY_INT_MASK_ANEG_COMP | PHY_INT_MASK_LINK_DOWN));
1800                 if (ret < 0) {
1801                         netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1802                         goto done;
1803                 }
1804
1805                 /* if link is down then configure EDPD and enter SUSPEND1,
1806                  * otherwise enter SUSPEND0 below
1807                  */
1808                 if (!link_up) {
1809                         struct mii_if_info *mii = &dev->mii;
1810                         netdev_info(dev->net, "entering SUSPEND1 mode\n");
1811
1812                         /* enable energy detect power-down mode */
1813                         ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id,
1814                                 PHY_MODE_CTRL_STS);
1815                         if (ret < 0) {
1816                                 netdev_warn(dev->net, "Error reading PHY_MODE_CTRL_STS\n");
1817                                 goto done;
1818                         }
1819
1820                         ret |= MODE_CTRL_STS_EDPWRDOWN;
1821
1822                         smsc75xx_mdio_write_nopm(dev->net, mii->phy_id,
1823                                 PHY_MODE_CTRL_STS, ret);
1824
1825                         /* enter SUSPEND1 mode */
1826                         ret = smsc75xx_enter_suspend1(dev);
1827                         goto done;
1828                 }
1829         }
1830
1831         if (pdata->wolopts & (WAKE_MCAST | WAKE_ARP)) {
1832                 int i, filter = 0;
1833
1834                 /* disable all filters */
1835                 for (i = 0; i < WUF_NUM; i++) {
1836                         ret = smsc75xx_write_reg_nopm(dev, WUF_CFGX + i * 4, 0);
1837                         if (ret < 0) {
1838                                 netdev_warn(dev->net, "Error writing WUF_CFGX\n");
1839                                 goto done;
1840                         }
1841                 }
1842
1843                 if (pdata->wolopts & WAKE_MCAST) {
1844                         const u8 mcast[] = {0x01, 0x00, 0x5E};
1845                         netdev_info(dev->net, "enabling multicast detection\n");
1846
1847                         val = WUF_CFGX_EN | WUF_CFGX_ATYPE_MULTICAST
1848                                 | smsc_crc(mcast, 3);
1849                         ret = smsc75xx_write_wuff(dev, filter++, val, 0x0007);
1850                         if (ret < 0) {
1851                                 netdev_warn(dev->net, "Error writing wakeup filter\n");
1852                                 goto done;
1853                         }
1854                 }
1855
1856                 if (pdata->wolopts & WAKE_ARP) {
1857                         const u8 arp[] = {0x08, 0x06};
1858                         netdev_info(dev->net, "enabling ARP detection\n");
1859
1860                         val = WUF_CFGX_EN | WUF_CFGX_ATYPE_ALL | (0x0C << 16)
1861                                 | smsc_crc(arp, 2);
1862                         ret = smsc75xx_write_wuff(dev, filter++, val, 0x0003);
1863                         if (ret < 0) {
1864                                 netdev_warn(dev->net, "Error writing wakeup filter\n");
1865                                 goto done;
1866                         }
1867                 }
1868
1869                 /* clear any pending pattern match packet status */
1870                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1871                 if (ret < 0) {
1872                         netdev_warn(dev->net, "Error reading WUCSR\n");
1873                         goto done;
1874                 }
1875
1876                 val |= WUCSR_WUFR;
1877
1878                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1879                 if (ret < 0) {
1880                         netdev_warn(dev->net, "Error writing WUCSR\n");
1881                         goto done;
1882                 }
1883
1884                 netdev_info(dev->net, "enabling packet match detection\n");
1885                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1886                 if (ret < 0) {
1887                         netdev_warn(dev->net, "Error reading WUCSR\n");
1888                         goto done;
1889                 }
1890
1891                 val |= WUCSR_WUEN;
1892
1893                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1894                 if (ret < 0) {
1895                         netdev_warn(dev->net, "Error writing WUCSR\n");
1896                         goto done;
1897                 }
1898         } else {
1899                 netdev_info(dev->net, "disabling packet match detection\n");
1900                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1901                 if (ret < 0) {
1902                         netdev_warn(dev->net, "Error reading WUCSR\n");
1903                         goto done;
1904                 }
1905
1906                 val &= ~WUCSR_WUEN;
1907
1908                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1909                 if (ret < 0) {
1910                         netdev_warn(dev->net, "Error writing WUCSR\n");
1911                         goto done;
1912                 }
1913         }
1914
1915         /* disable magic, bcast & unicast wakeup sources */
1916         ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1917         if (ret < 0) {
1918                 netdev_warn(dev->net, "Error reading WUCSR\n");
1919                 goto done;
1920         }
1921
1922         val &= ~(WUCSR_MPEN | WUCSR_BCST_EN | WUCSR_PFDA_EN);
1923
1924         ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1925         if (ret < 0) {
1926                 netdev_warn(dev->net, "Error writing WUCSR\n");
1927                 goto done;
1928         }
1929
1930         if (pdata->wolopts & WAKE_PHY) {
1931                 netdev_info(dev->net, "enabling PHY wakeup\n");
1932
1933                 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1934                 if (ret < 0) {
1935                         netdev_warn(dev->net, "Error reading PMT_CTL\n");
1936                         goto done;
1937                 }
1938
1939                 /* clear wol status, enable energy detection */
1940                 val &= ~PMT_CTL_WUPS;
1941                 val |= (PMT_CTL_WUPS_ED | PMT_CTL_ED_EN);
1942
1943                 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1944                 if (ret < 0) {
1945                         netdev_warn(dev->net, "Error writing PMT_CTL\n");
1946                         goto done;
1947                 }
1948         }
1949
1950         if (pdata->wolopts & WAKE_MAGIC) {
1951                 netdev_info(dev->net, "enabling magic packet wakeup\n");
1952                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1953                 if (ret < 0) {
1954                         netdev_warn(dev->net, "Error reading WUCSR\n");
1955                         goto done;
1956                 }
1957
1958                 /* clear any pending magic packet status */
1959                 val |= WUCSR_MPR | WUCSR_MPEN;
1960
1961                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1962                 if (ret < 0) {
1963                         netdev_warn(dev->net, "Error writing WUCSR\n");
1964                         goto done;
1965                 }
1966         }
1967
1968         if (pdata->wolopts & WAKE_BCAST) {
1969                 netdev_info(dev->net, "enabling broadcast detection\n");
1970                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1971                 if (ret < 0) {
1972                         netdev_warn(dev->net, "Error reading WUCSR\n");
1973                         goto done;
1974                 }
1975
1976                 val |= WUCSR_BCAST_FR | WUCSR_BCST_EN;
1977
1978                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1979                 if (ret < 0) {
1980                         netdev_warn(dev->net, "Error writing WUCSR\n");
1981                         goto done;
1982                 }
1983         }
1984
1985         if (pdata->wolopts & WAKE_UCAST) {
1986                 netdev_info(dev->net, "enabling unicast detection\n");
1987                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1988                 if (ret < 0) {
1989                         netdev_warn(dev->net, "Error reading WUCSR\n");
1990                         goto done;
1991                 }
1992
1993                 val |= WUCSR_WUFR | WUCSR_PFDA_EN;
1994
1995                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1996                 if (ret < 0) {
1997                         netdev_warn(dev->net, "Error writing WUCSR\n");
1998                         goto done;
1999                 }
2000         }
2001
2002         /* enable receiver to enable frame reception */
2003         ret = smsc75xx_read_reg_nopm(dev, MAC_RX, &val);
2004         if (ret < 0) {
2005                 netdev_warn(dev->net, "Failed to read MAC_RX: %d\n", ret);
2006                 goto done;
2007         }
2008
2009         val |= MAC_RX_RXEN;
2010
2011         ret = smsc75xx_write_reg_nopm(dev, MAC_RX, val);
2012         if (ret < 0) {
2013                 netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
2014                 goto done;
2015         }
2016
2017         /* some wol options are enabled, so enter SUSPEND0 */
2018         netdev_info(dev->net, "entering SUSPEND0 mode\n");
2019         ret = smsc75xx_enter_suspend0(dev);
2020
2021 done:
2022         /*
2023          * TODO: resume() might need to handle the suspend failure
2024          * in system sleep
2025          */
2026         if (ret && PMSG_IS_AUTO(message))
2027                 usbnet_resume(intf);
2028         return ret;
2029 }
2030
2031 static int smsc75xx_resume(struct usb_interface *intf)
2032 {
2033         struct usbnet *dev = usb_get_intfdata(intf);
2034         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
2035         u8 suspend_flags = pdata->suspend_flags;
2036         int ret;
2037         u32 val;
2038
2039         netdev_dbg(dev->net, "resume suspend_flags=0x%02x\n", suspend_flags);
2040
2041         /* do this first to ensure it's cleared even in error case */
2042         pdata->suspend_flags = 0;
2043
2044         if (suspend_flags & SUSPEND_ALLMODES) {
2045                 /* Disable wakeup sources */
2046                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
2047                 if (ret < 0) {
2048                         netdev_warn(dev->net, "Error reading WUCSR\n");
2049                         return ret;
2050                 }
2051
2052                 val &= ~(WUCSR_WUEN | WUCSR_MPEN | WUCSR_PFDA_EN
2053                         | WUCSR_BCST_EN);
2054
2055                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
2056                 if (ret < 0) {
2057                         netdev_warn(dev->net, "Error writing WUCSR\n");
2058                         return ret;
2059                 }
2060
2061                 /* clear wake-up status */
2062                 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
2063                 if (ret < 0) {
2064                         netdev_warn(dev->net, "Error reading PMT_CTL\n");
2065                         return ret;
2066                 }
2067
2068                 val &= ~PMT_CTL_WOL_EN;
2069                 val |= PMT_CTL_WUPS;
2070
2071                 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
2072                 if (ret < 0) {
2073                         netdev_warn(dev->net, "Error writing PMT_CTL\n");
2074                         return ret;
2075                 }
2076         }
2077
2078         if (suspend_flags & SUSPEND_SUSPEND2) {
2079                 netdev_info(dev->net, "resuming from SUSPEND2\n");
2080
2081                 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
2082                 if (ret < 0) {
2083                         netdev_warn(dev->net, "Error reading PMT_CTL\n");
2084                         return ret;
2085                 }
2086
2087                 val |= PMT_CTL_PHY_PWRUP;
2088
2089                 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
2090                 if (ret < 0) {
2091                         netdev_warn(dev->net, "Error writing PMT_CTL\n");
2092                         return ret;
2093                 }
2094         }
2095
2096         ret = smsc75xx_wait_ready(dev, 1);
2097         if (ret < 0) {
2098                 netdev_warn(dev->net, "device not ready in smsc75xx_resume\n");
2099                 return ret;
2100         }
2101
2102         return usbnet_resume(intf);
2103 }
2104
2105 static void smsc75xx_rx_csum_offload(struct usbnet *dev, struct sk_buff *skb,
2106                                      u32 rx_cmd_a, u32 rx_cmd_b)
2107 {
2108         if (!(dev->net->features & NETIF_F_RXCSUM) ||
2109             unlikely(rx_cmd_a & RX_CMD_A_LCSM)) {
2110                 skb->ip_summed = CHECKSUM_NONE;
2111         } else {
2112                 skb->csum = ntohs((u16)(rx_cmd_b >> RX_CMD_B_CSUM_SHIFT));
2113                 skb->ip_summed = CHECKSUM_COMPLETE;
2114         }
2115 }
2116
2117 static int smsc75xx_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
2118 {
2119         /* This check is no longer done by usbnet */
2120         if (skb->len < dev->net->hard_header_len)
2121                 return 0;
2122
2123         while (skb->len > 0) {
2124                 u32 rx_cmd_a, rx_cmd_b, align_count, size;
2125                 struct sk_buff *ax_skb;
2126                 unsigned char *packet;
2127
2128                 memcpy(&rx_cmd_a, skb->data, sizeof(rx_cmd_a));
2129                 le32_to_cpus(&rx_cmd_a);
2130                 skb_pull(skb, 4);
2131
2132                 memcpy(&rx_cmd_b, skb->data, sizeof(rx_cmd_b));
2133                 le32_to_cpus(&rx_cmd_b);
2134                 skb_pull(skb, 4 + RXW_PADDING);
2135
2136                 packet = skb->data;
2137
2138                 /* get the packet length */
2139                 size = (rx_cmd_a & RX_CMD_A_LEN) - RXW_PADDING;
2140                 align_count = (4 - ((size + RXW_PADDING) % 4)) % 4;
2141
2142                 if (unlikely(rx_cmd_a & RX_CMD_A_RED)) {
2143                         netif_dbg(dev, rx_err, dev->net,
2144                                   "Error rx_cmd_a=0x%08x\n", rx_cmd_a);
2145                         dev->net->stats.rx_errors++;
2146                         dev->net->stats.rx_dropped++;
2147
2148                         if (rx_cmd_a & RX_CMD_A_FCS)
2149                                 dev->net->stats.rx_crc_errors++;
2150                         else if (rx_cmd_a & (RX_CMD_A_LONG | RX_CMD_A_RUNT))
2151                                 dev->net->stats.rx_frame_errors++;
2152                 } else {
2153                         /* MAX_SINGLE_PACKET_SIZE + 4(CRC) + 2(COE) + 4(Vlan) */
2154                         if (unlikely(size > (MAX_SINGLE_PACKET_SIZE + ETH_HLEN + 12))) {
2155                                 netif_dbg(dev, rx_err, dev->net,
2156                                           "size err rx_cmd_a=0x%08x\n",
2157                                           rx_cmd_a);
2158                                 return 0;
2159                         }
2160
2161                         /* last frame in this batch */
2162                         if (skb->len == size) {
2163                                 smsc75xx_rx_csum_offload(dev, skb, rx_cmd_a,
2164                                         rx_cmd_b);
2165
2166                                 skb_trim(skb, skb->len - 4); /* remove fcs */
2167                                 skb->truesize = size + sizeof(struct sk_buff);
2168
2169                                 return 1;
2170                         }
2171
2172                         ax_skb = skb_clone(skb, GFP_ATOMIC);
2173                         if (unlikely(!ax_skb)) {
2174                                 netdev_warn(dev->net, "Error allocating skb\n");
2175                                 return 0;
2176                         }
2177
2178                         ax_skb->len = size;
2179                         ax_skb->data = packet;
2180                         skb_set_tail_pointer(ax_skb, size);
2181
2182                         smsc75xx_rx_csum_offload(dev, ax_skb, rx_cmd_a,
2183                                 rx_cmd_b);
2184
2185                         skb_trim(ax_skb, ax_skb->len - 4); /* remove fcs */
2186                         ax_skb->truesize = size + sizeof(struct sk_buff);
2187
2188                         usbnet_skb_return(dev, ax_skb);
2189                 }
2190
2191                 skb_pull(skb, size);
2192
2193                 /* padding bytes before the next frame starts */
2194                 if (skb->len)
2195                         skb_pull(skb, align_count);
2196         }
2197
2198         return 1;
2199 }
2200
2201 static struct sk_buff *smsc75xx_tx_fixup(struct usbnet *dev,
2202                                          struct sk_buff *skb, gfp_t flags)
2203 {
2204         u32 tx_cmd_a, tx_cmd_b;
2205
2206         if (skb_headroom(skb) < SMSC75XX_TX_OVERHEAD) {
2207                 struct sk_buff *skb2 =
2208                         skb_copy_expand(skb, SMSC75XX_TX_OVERHEAD, 0, flags);
2209                 dev_kfree_skb_any(skb);
2210                 skb = skb2;
2211                 if (!skb)
2212                         return NULL;
2213         }
2214
2215         tx_cmd_a = (u32)(skb->len & TX_CMD_A_LEN) | TX_CMD_A_FCS;
2216
2217         if (skb->ip_summed == CHECKSUM_PARTIAL)
2218                 tx_cmd_a |= TX_CMD_A_IPE | TX_CMD_A_TPE;
2219
2220         if (skb_is_gso(skb)) {
2221                 u16 mss = max(skb_shinfo(skb)->gso_size, TX_MSS_MIN);
2222                 tx_cmd_b = (mss << TX_CMD_B_MSS_SHIFT) & TX_CMD_B_MSS;
2223
2224                 tx_cmd_a |= TX_CMD_A_LSO;
2225         } else {
2226                 tx_cmd_b = 0;
2227         }
2228
2229         skb_push(skb, 4);
2230         cpu_to_le32s(&tx_cmd_b);
2231         memcpy(skb->data, &tx_cmd_b, 4);
2232
2233         skb_push(skb, 4);
2234         cpu_to_le32s(&tx_cmd_a);
2235         memcpy(skb->data, &tx_cmd_a, 4);
2236
2237         return skb;
2238 }
2239
2240 static int smsc75xx_manage_power(struct usbnet *dev, int on)
2241 {
2242         dev->intf->needs_remote_wakeup = on;
2243         return 0;
2244 }
2245
2246 static const struct driver_info smsc75xx_info = {
2247         .description    = "smsc75xx USB 2.0 Gigabit Ethernet",
2248         .bind           = smsc75xx_bind,
2249         .unbind         = smsc75xx_unbind,
2250         .link_reset     = smsc75xx_link_reset,
2251         .reset          = smsc75xx_reset,
2252         .rx_fixup       = smsc75xx_rx_fixup,
2253         .tx_fixup       = smsc75xx_tx_fixup,
2254         .status         = smsc75xx_status,
2255         .manage_power   = smsc75xx_manage_power,
2256         .flags          = FLAG_ETHER | FLAG_SEND_ZLP | FLAG_LINK_INTR,
2257 };
2258
2259 static const struct usb_device_id products[] = {
2260         {
2261                 /* SMSC7500 USB Gigabit Ethernet Device */
2262                 USB_DEVICE(USB_VENDOR_ID_SMSC, USB_PRODUCT_ID_LAN7500),
2263                 .driver_info = (unsigned long) &smsc75xx_info,
2264         },
2265         {
2266                 /* SMSC7500 USB Gigabit Ethernet Device */
2267                 USB_DEVICE(USB_VENDOR_ID_SMSC, USB_PRODUCT_ID_LAN7505),
2268                 .driver_info = (unsigned long) &smsc75xx_info,
2269         },
2270         { },            /* END */
2271 };
2272 MODULE_DEVICE_TABLE(usb, products);
2273
2274 static struct usb_driver smsc75xx_driver = {
2275         .name           = SMSC_CHIPNAME,
2276         .id_table       = products,
2277         .probe          = usbnet_probe,
2278         .suspend        = smsc75xx_suspend,
2279         .resume         = smsc75xx_resume,
2280         .reset_resume   = smsc75xx_resume,
2281         .disconnect     = usbnet_disconnect,
2282         .disable_hub_initiated_lpm = 1,
2283         .supports_autosuspend = 1,
2284 };
2285
2286 module_usb_driver(smsc75xx_driver);
2287
2288 MODULE_AUTHOR("Nancy Lin");
2289 MODULE_AUTHOR("Steve Glendinning <steve.glendinning@shawell.net>");
2290 MODULE_DESCRIPTION("SMSC75XX USB 2.0 Gigabit Ethernet Devices");
2291 MODULE_LICENSE("GPL");