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 smsc75xx_link_ok_nopm(struct usbnet *dev);
  86 static int smsc75xx_phy_gig_workaround(struct usbnet *dev);
  87
  88 static int __must_check __smsc75xx_read_reg(struct usbnet *dev, u32 index,
  89                                             u32 *data, int in_pm)
  90 {
  91         u32 buf;
  92         int ret;
  93         int (*fn)(struct usbnet *, u8, u8, u16, u16, void *, u16);
  94
  95         BUG_ON(!dev);
  96
  97         if (!in_pm)
  98                 fn = usbnet_read_cmd;
  99         else
 100                 fn = usbnet_read_cmd_nopm;
 101
 102         ret = fn(dev, USB_VENDOR_REQUEST_READ_REGISTER, USB_DIR_IN
 103                  | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 104                  0, index, &buf, 4);
 105         if (unlikely(ret < 0)) {
 106                 netdev_warn(dev->net, "Failed to read reg index 0x%08x: %d\n",
 107                             index, ret);
 108                 return ret;
 109         }
 110
 111         le32_to_cpus(&buf);
 112         *data = buf;
 113
 114         return ret;
 115 }
 116
 117 static int __must_check __smsc75xx_write_reg(struct usbnet *dev, u32 index,
 118                                              u32 data, int in_pm)
 119 {
 120         u32 buf;
 121         int ret;
 122         int (*fn)(struct usbnet *, u8, u8, u16, u16, const void *, u16);
 123
 124         BUG_ON(!dev);
 125
 126         if (!in_pm)
 127                 fn = usbnet_write_cmd;
 128         else
 129                 fn = usbnet_write_cmd_nopm;
 130
 131         buf = data;
 132         cpu_to_le32s(&buf);
 133
 134         ret = fn(dev, USB_VENDOR_REQUEST_WRITE_REGISTER, USB_DIR_OUT
 135                  | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 136                  0, index, &buf, 4);
 137         if (unlikely(ret < 0))
 138                 netdev_warn(dev->net, "Failed to write reg index 0x%08x: %d\n",
 139                             index, ret);
 140
 141         return ret;
 142 }
 143
 144 static int __must_check smsc75xx_read_reg_nopm(struct usbnet *dev, u32 index,
 145                                                u32 *data)
 146 {
 147         return __smsc75xx_read_reg(dev, index, data, 1);
 148 }
 149
 150 static int __must_check smsc75xx_write_reg_nopm(struct usbnet *dev, u32 index,
 151                                                 u32 data)
 152 {
 153         return __smsc75xx_write_reg(dev, index, data, 1);
 154 }
 155
 156 static int __must_check smsc75xx_read_reg(struct usbnet *dev, u32 index,
 157                                           u32 *data)
 158 {
 159         return __smsc75xx_read_reg(dev, index, data, 0);
 160 }
 161
 162 static int __must_check smsc75xx_write_reg(struct usbnet *dev, u32 index,
 163                                            u32 data)
 164 {
 165         return __smsc75xx_write_reg(dev, index, data, 0);
 166 }
 167
 168 /* Loop until the read is completed with timeout
 169  * called with phy_mutex held */
 170 static __must_check int __smsc75xx_phy_wait_not_busy(struct usbnet *dev,
 171                                                      int in_pm)
 172 {
 173         unsigned long start_time = jiffies;
 174         u32 val;
 175         int ret;
 176
 177         do {
 178                 ret = __smsc75xx_read_reg(dev, MII_ACCESS, &val, in_pm);
 179                 if (ret < 0) {
 180                         netdev_warn(dev->net, "Error reading MII_ACCESS\n");
 181                         return ret;
 182                 }
 183
 184                 if (!(val & MII_ACCESS_BUSY))
 185                         return 0;
 186         } while (!time_after(jiffies, start_time + HZ));
 187
 188         return -EIO;
 189 }
 190
 191 static int __smsc75xx_mdio_read(struct net_device *netdev, int phy_id, int idx,
 192                                 int in_pm)
 193 {
 194         struct usbnet *dev = netdev_priv(netdev);
 195         u32 val, addr;
 196         int ret;
 197
 198         mutex_lock(&dev->phy_mutex);
 199
 200         /* confirm MII not busy */
 201         ret = __smsc75xx_phy_wait_not_busy(dev, in_pm);
 202         if (ret < 0) {
 203                 netdev_warn(dev->net, "MII is busy in smsc75xx_mdio_read\n");
 204                 goto done;
 205         }
 206
 207         /* set the address, index & direction (read from PHY) */
 208         phy_id &= dev->mii.phy_id_mask;
 209         idx &= dev->mii.reg_num_mask;
 210         addr = ((phy_id << MII_ACCESS_PHY_ADDR_SHIFT) & MII_ACCESS_PHY_ADDR)
 211                 | ((idx << MII_ACCESS_REG_ADDR_SHIFT) & MII_ACCESS_REG_ADDR)
 212                 | MII_ACCESS_READ | MII_ACCESS_BUSY;
 213         ret = __smsc75xx_write_reg(dev, MII_ACCESS, addr, in_pm);
 214         if (ret < 0) {
 215                 netdev_warn(dev->net, "Error writing MII_ACCESS\n");
 216                 goto done;
 217         }
 218
 219         ret = __smsc75xx_phy_wait_not_busy(dev, in_pm);
 220         if (ret < 0) {
 221                 netdev_warn(dev->net, "Timed out reading MII reg %02X\n", idx);
 222                 goto done;
 223         }
 224
 225         ret = __smsc75xx_read_reg(dev, MII_DATA, &val, in_pm);
 226         if (ret < 0) {
 227                 netdev_warn(dev->net, "Error reading MII_DATA\n");
 228                 goto done;
 229         }
 230
 231         ret = (u16)(val & 0xFFFF);
 232
 233 done:
 234         mutex_unlock(&dev->phy_mutex);
 235         return ret;
 236 }
 237
 238 static void __smsc75xx_mdio_write(struct net_device *netdev, int phy_id,
 239                                   int idx, int regval, int in_pm)
 240 {
 241         struct usbnet *dev = netdev_priv(netdev);
 242         u32 val, addr;
 243         int ret;
 244
 245         mutex_lock(&dev->phy_mutex);
 246
 247         /* confirm MII not busy */
 248         ret = __smsc75xx_phy_wait_not_busy(dev, in_pm);
 249         if (ret < 0) {
 250                 netdev_warn(dev->net, "MII is busy in smsc75xx_mdio_write\n");
 251                 goto done;
 252         }
 253
 254         val = regval;
 255         ret = __smsc75xx_write_reg(dev, MII_DATA, val, in_pm);
 256         if (ret < 0) {
 257                 netdev_warn(dev->net, "Error writing MII_DATA\n");
 258                 goto done;
 259         }
 260
 261         /* set the address, index & direction (write to PHY) */
 262         phy_id &= dev->mii.phy_id_mask;
 263         idx &= dev->mii.reg_num_mask;
 264         addr = ((phy_id << MII_ACCESS_PHY_ADDR_SHIFT) & MII_ACCESS_PHY_ADDR)
 265                 | ((idx << MII_ACCESS_REG_ADDR_SHIFT) & MII_ACCESS_REG_ADDR)
 266                 | MII_ACCESS_WRITE | MII_ACCESS_BUSY;
 267         ret = __smsc75xx_write_reg(dev, MII_ACCESS, addr, in_pm);
 268         if (ret < 0) {
 269                 netdev_warn(dev->net, "Error writing MII_ACCESS\n");
 270                 goto done;
 271         }
 272
 273         ret = __smsc75xx_phy_wait_not_busy(dev, in_pm);
 274         if (ret < 0) {
 275                 netdev_warn(dev->net, "Timed out writing MII reg %02X\n", idx);
 276                 goto done;
 277         }
 278
 279 done:
 280         mutex_unlock(&dev->phy_mutex);
 281 }
 282
 283 static int smsc75xx_mdio_read_nopm(struct net_device *netdev, int phy_id,
 284                                    int idx)
 285 {
 286         return __smsc75xx_mdio_read(netdev, phy_id, idx, 1);
 287 }
 288
 289 static void smsc75xx_mdio_write_nopm(struct net_device *netdev, int phy_id,
 290                                      int idx, int regval)
 291 {
 292         __smsc75xx_mdio_write(netdev, phy_id, idx, regval, 1);
 293 }
 294
 295 static int smsc75xx_mdio_read(struct net_device *netdev, int phy_id, int idx)
 296 {
 297         return __smsc75xx_mdio_read(netdev, phy_id, idx, 0);
 298 }
 299
 300 static void smsc75xx_mdio_write(struct net_device *netdev, int phy_id, int idx,
 301                                 int regval)
 302 {
 303         __smsc75xx_mdio_write(netdev, phy_id, idx, regval, 0);
 304 }
 305
 306 static int smsc75xx_wait_eeprom(struct usbnet *dev)
 307 {
 308         unsigned long start_time = jiffies;
 309         u32 val;
 310         int ret;
 311
 312         do {
 313                 ret = smsc75xx_read_reg(dev, E2P_CMD, &val);
 314                 if (ret < 0) {
 315                         netdev_warn(dev->net, "Error reading E2P_CMD\n");
 316                         return ret;
 317                 }
 318
 319                 if (!(val & E2P_CMD_BUSY) || (val & E2P_CMD_TIMEOUT))
 320                         break;
 321                 udelay(40);
 322         } while (!time_after(jiffies, start_time + HZ));
 323
 324         if (val & (E2P_CMD_TIMEOUT | E2P_CMD_BUSY)) {
 325                 netdev_warn(dev->net, "EEPROM read operation timeout\n");
 326                 return -EIO;
 327         }
 328
 329         return 0;
 330 }
 331
 332 static int smsc75xx_eeprom_confirm_not_busy(struct usbnet *dev)
 333 {
 334         unsigned long start_time = jiffies;
 335         u32 val;
 336         int ret;
 337
 338         do {
 339                 ret = smsc75xx_read_reg(dev, E2P_CMD, &val);
 340                 if (ret < 0) {
 341                         netdev_warn(dev->net, "Error reading E2P_CMD\n");
 342                         return ret;
 343                 }
 344
 345                 if (!(val & E2P_CMD_BUSY))
 346                         return 0;
 347
 348                 udelay(40);
 349         } while (!time_after(jiffies, start_time + HZ));
 350
 351         netdev_warn(dev->net, "EEPROM is busy\n");
 352         return -EIO;
 353 }
 354
 355 static int smsc75xx_read_eeprom(struct usbnet *dev, u32 offset, u32 length,
 356                                 u8 *data)
 357 {
 358         u32 val;
 359         int i, ret;
 360
 361         BUG_ON(!dev);
 362         BUG_ON(!data);
 363
 364         ret = smsc75xx_eeprom_confirm_not_busy(dev);
 365         if (ret)
 366                 return ret;
 367
 368         for (i = 0; i < length; i++) {
 369                 val = E2P_CMD_BUSY | E2P_CMD_READ | (offset & E2P_CMD_ADDR);
 370                 ret = smsc75xx_write_reg(dev, E2P_CMD, val);
 371                 if (ret < 0) {
 372                         netdev_warn(dev->net, "Error writing E2P_CMD\n");
 373                         return ret;
 374                 }
 375
 376                 ret = smsc75xx_wait_eeprom(dev);
 377                 if (ret < 0)
 378                         return ret;
 379
 380                 ret = smsc75xx_read_reg(dev, E2P_DATA, &val);
 381                 if (ret < 0) {
 382                         netdev_warn(dev->net, "Error reading E2P_DATA\n");
 383                         return ret;
 384                 }
 385
 386                 data[i] = val & 0xFF;
 387                 offset++;
 388         }
 389
 390         return 0;
 391 }
 392
 393 static int smsc75xx_write_eeprom(struct usbnet *dev, u32 offset, u32 length,
 394                                  u8 *data)
 395 {
 396         u32 val;
 397         int i, ret;
 398
 399         BUG_ON(!dev);
 400         BUG_ON(!data);
 401
 402         ret = smsc75xx_eeprom_confirm_not_busy(dev);
 403         if (ret)
 404                 return ret;
 405
 406         /* Issue write/erase enable command */
 407         val = E2P_CMD_BUSY | E2P_CMD_EWEN;
 408         ret = smsc75xx_write_reg(dev, E2P_CMD, val);
 409         if (ret < 0) {
 410                 netdev_warn(dev->net, "Error writing E2P_CMD\n");
 411                 return ret;
 412         }
 413
 414         ret = smsc75xx_wait_eeprom(dev);
 415         if (ret < 0)
 416                 return ret;
 417
 418         for (i = 0; i < length; i++) {
 419
 420                 /* Fill data register */
 421                 val = data[i];
 422                 ret = smsc75xx_write_reg(dev, E2P_DATA, val);
 423                 if (ret < 0) {
 424                         netdev_warn(dev->net, "Error writing E2P_DATA\n");
 425                         return ret;
 426                 }
 427
 428                 /* Send "write" command */
 429                 val = E2P_CMD_BUSY | E2P_CMD_WRITE | (offset & E2P_CMD_ADDR);
 430                 ret = smsc75xx_write_reg(dev, E2P_CMD, val);
 431                 if (ret < 0) {
 432                         netdev_warn(dev->net, "Error writing E2P_CMD\n");
 433                         return ret;
 434                 }
 435
 436                 ret = smsc75xx_wait_eeprom(dev);
 437                 if (ret < 0)
 438                         return ret;
 439
 440                 offset++;
 441         }
 442
 443         return 0;
 444 }
 445
 446 static int smsc75xx_dataport_wait_not_busy(struct usbnet *dev)
 447 {
 448         int i, ret;
 449
 450         for (i = 0; i < 100; i++) {
 451                 u32 dp_sel;
 452                 ret = smsc75xx_read_reg(dev, DP_SEL, &dp_sel);
 453                 if (ret < 0) {
 454                         netdev_warn(dev->net, "Error reading DP_SEL\n");
 455                         return ret;
 456                 }
 457
 458                 if (dp_sel & DP_SEL_DPRDY)
 459                         return 0;
 460
 461                 udelay(40);
 462         }
 463
 464         netdev_warn(dev->net, "smsc75xx_dataport_wait_not_busy timed out\n");
 465
 466         return -EIO;
 467 }
 468
 469 static int smsc75xx_dataport_write(struct usbnet *dev, u32 ram_select, u32 addr,
 470                                    u32 length, u32 *buf)
 471 {
 472         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 473         u32 dp_sel;
 474         int i, ret;
 475
 476         mutex_lock(&pdata->dataport_mutex);
 477
 478         ret = smsc75xx_dataport_wait_not_busy(dev);
 479         if (ret < 0) {
 480                 netdev_warn(dev->net, "smsc75xx_dataport_write busy on entry\n");
 481                 goto done;
 482         }
 483
 484         ret = smsc75xx_read_reg(dev, DP_SEL, &dp_sel);
 485         if (ret < 0) {
 486                 netdev_warn(dev->net, "Error reading DP_SEL\n");
 487                 goto done;
 488         }
 489
 490         dp_sel &= ~DP_SEL_RSEL;
 491         dp_sel |= ram_select;
 492         ret = smsc75xx_write_reg(dev, DP_SEL, dp_sel);
 493         if (ret < 0) {
 494                 netdev_warn(dev->net, "Error writing DP_SEL\n");
 495                 goto done;
 496         }
 497
 498         for (i = 0; i < length; i++) {
 499                 ret = smsc75xx_write_reg(dev, DP_ADDR, addr + i);
 500                 if (ret < 0) {
 501                         netdev_warn(dev->net, "Error writing DP_ADDR\n");
 502                         goto done;
 503                 }
 504
 505                 ret = smsc75xx_write_reg(dev, DP_DATA, buf[i]);
 506                 if (ret < 0) {
 507                         netdev_warn(dev->net, "Error writing DP_DATA\n");
 508                         goto done;
 509                 }
 510
 511                 ret = smsc75xx_write_reg(dev, DP_CMD, DP_CMD_WRITE);
 512                 if (ret < 0) {
 513                         netdev_warn(dev->net, "Error writing DP_CMD\n");
 514                         goto done;
 515                 }
 516
 517                 ret = smsc75xx_dataport_wait_not_busy(dev);
 518                 if (ret < 0) {
 519                         netdev_warn(dev->net, "smsc75xx_dataport_write timeout\n");
 520                         goto done;
 521                 }
 522         }
 523
 524 done:
 525         mutex_unlock(&pdata->dataport_mutex);
 526         return ret;
 527 }
 528
 529 /* returns hash bit number for given MAC address */
 530 static u32 smsc75xx_hash(char addr[ETH_ALEN])
 531 {
 532         return (ether_crc(ETH_ALEN, addr) >> 23) & 0x1ff;
 533 }
 534
 535 static void smsc75xx_deferred_multicast_write(struct work_struct *param)
 536 {
 537         struct smsc75xx_priv *pdata =
 538                 container_of(param, struct smsc75xx_priv, set_multicast);
 539         struct usbnet *dev = pdata->dev;
 540         int ret;
 541
 542         netif_dbg(dev, drv, dev->net, "deferred multicast write 0x%08x\n",
 543                   pdata->rfe_ctl);
 544
 545         smsc75xx_dataport_write(dev, DP_SEL_VHF, DP_SEL_VHF_VLAN_LEN,
 546                 DP_SEL_VHF_HASH_LEN, pdata->multicast_hash_table);
 547
 548         ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
 549         if (ret < 0)
 550                 netdev_warn(dev->net, "Error writing RFE_CRL\n");
 551 }
 552
 553 static void smsc75xx_set_multicast(struct net_device *netdev)
 554 {
 555         struct usbnet *dev = netdev_priv(netdev);
 556         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 557         unsigned long flags;
 558         int i;
 559
 560         spin_lock_irqsave(&pdata->rfe_ctl_lock, flags);
 561
 562         pdata->rfe_ctl &=
 563                 ~(RFE_CTL_AU | RFE_CTL_AM | RFE_CTL_DPF | RFE_CTL_MHF);
 564         pdata->rfe_ctl |= RFE_CTL_AB;
 565
 566         for (i = 0; i < DP_SEL_VHF_HASH_LEN; i++)
 567                 pdata->multicast_hash_table[i] = 0;
 568
 569         if (dev->net->flags & IFF_PROMISC) {
 570                 netif_dbg(dev, drv, dev->net, "promiscuous mode enabled\n");
 571                 pdata->rfe_ctl |= RFE_CTL_AM | RFE_CTL_AU;
 572         } else if (dev->net->flags & IFF_ALLMULTI) {
 573                 netif_dbg(dev, drv, dev->net, "receive all multicast enabled\n");
 574                 pdata->rfe_ctl |= RFE_CTL_AM | RFE_CTL_DPF;
 575         } else if (!netdev_mc_empty(dev->net)) {
 576                 struct netdev_hw_addr *ha;
 577
 578                 netif_dbg(dev, drv, dev->net, "receive multicast hash filter\n");
 579
 580                 pdata->rfe_ctl |= RFE_CTL_MHF | RFE_CTL_DPF;
 581
 582                 netdev_for_each_mc_addr(ha, netdev) {
 583                         u32 bitnum = smsc75xx_hash(ha->addr);
 584                         pdata->multicast_hash_table[bitnum / 32] |=
 585                                 (1 << (bitnum % 32));
 586                 }
 587         } else {
 588                 netif_dbg(dev, drv, dev->net, "receive own packets only\n");
 589                 pdata->rfe_ctl |= RFE_CTL_DPF;
 590         }
 591
 592         spin_unlock_irqrestore(&pdata->rfe_ctl_lock, flags);
 593
 594         /* defer register writes to a sleepable context */
 595         schedule_work(&pdata->set_multicast);
 596 }
 597
 598 static int smsc75xx_update_flowcontrol(struct usbnet *dev, u8 duplex,
 599                                             u16 lcladv, u16 rmtadv)
 600 {
 601         u32 flow = 0, fct_flow = 0;
 602         int ret;
 603
 604         if (duplex == DUPLEX_FULL) {
 605                 u8 cap = mii_resolve_flowctrl_fdx(lcladv, rmtadv);
 606
 607                 if (cap & FLOW_CTRL_TX) {
 608                         flow = (FLOW_TX_FCEN | 0xFFFF);
 609                         /* set fct_flow thresholds to 20% and 80% */
 610                         fct_flow = (8 << 8) | 32;
 611                 }
 612
 613                 if (cap & FLOW_CTRL_RX)
 614                         flow |= FLOW_RX_FCEN;
 615
 616                 netif_dbg(dev, link, dev->net, "rx pause %s, tx pause %s\n",
 617                           (cap & FLOW_CTRL_RX ? "enabled" : "disabled"),
 618                           (cap & FLOW_CTRL_TX ? "enabled" : "disabled"));
 619         } else {
 620                 netif_dbg(dev, link, dev->net, "half duplex\n");
 621         }
 622
 623         ret = smsc75xx_write_reg(dev, FLOW, flow);
 624         if (ret < 0) {
 625                 netdev_warn(dev->net, "Error writing FLOW\n");
 626                 return ret;
 627         }
 628
 629         ret = smsc75xx_write_reg(dev, FCT_FLOW, fct_flow);
 630         if (ret < 0) {
 631                 netdev_warn(dev->net, "Error writing FCT_FLOW\n");
 632                 return ret;
 633         }
 634
 635         return 0;
 636 }
 637
 638 static int smsc75xx_link_reset(struct usbnet *dev)
 639 {
 640         struct mii_if_info *mii = &dev->mii;
 641         struct ethtool_cmd ecmd = { .cmd = ETHTOOL_GSET };
 642         u16 lcladv, rmtadv;
 643         int ret;
 644
 645         /* write to clear phy interrupt status */
 646         smsc75xx_mdio_write(dev->net, mii->phy_id, PHY_INT_SRC,
 647                 PHY_INT_SRC_CLEAR_ALL);
 648
 649         ret = smsc75xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL);
 650         if (ret < 0) {
 651                 netdev_warn(dev->net, "Error writing INT_STS\n");
 652                 return ret;
 653         }
 654
 655         mii_check_media(mii, 1, 1);
 656         mii_ethtool_gset(&dev->mii, &ecmd);
 657         lcladv = smsc75xx_mdio_read(dev->net, mii->phy_id, MII_ADVERTISE);
 658         rmtadv = smsc75xx_mdio_read(dev->net, mii->phy_id, MII_LPA);
 659
 660         netif_dbg(dev, link, dev->net, "speed: %u duplex: %d lcladv: %04x rmtadv: %04x\n",
 661                   ethtool_cmd_speed(&ecmd), ecmd.duplex, lcladv, rmtadv);
 662
 663         return smsc75xx_update_flowcontrol(dev, ecmd.duplex, lcladv, rmtadv);
 664 }
 665
 666 static void smsc75xx_status(struct usbnet *dev, struct urb *urb)
 667 {
 668         u32 intdata;
 669
 670         if (urb->actual_length != 4) {
 671                 netdev_warn(dev->net, "unexpected urb length %d\n",
 672                             urb->actual_length);
 673                 return;
 674         }
 675
 676         memcpy(&intdata, urb->transfer_buffer, 4);
 677         le32_to_cpus(&intdata);
 678
 679         netif_dbg(dev, link, dev->net, "intdata: 0x%08X\n", intdata);
 680
 681         if (intdata & INT_ENP_PHY_INT)
 682                 usbnet_defer_kevent(dev, EVENT_LINK_RESET);
 683         else
 684                 netdev_warn(dev->net, "unexpected interrupt, intdata=0x%08X\n",
 685                             intdata);
 686 }
 687
 688 static int smsc75xx_ethtool_get_eeprom_len(struct net_device *net)
 689 {
 690         return MAX_EEPROM_SIZE;
 691 }
 692
 693 static int smsc75xx_ethtool_get_eeprom(struct net_device *netdev,
 694                                        struct ethtool_eeprom *ee, u8 *data)
 695 {
 696         struct usbnet *dev = netdev_priv(netdev);
 697
 698         ee->magic = LAN75XX_EEPROM_MAGIC;
 699
 700         return smsc75xx_read_eeprom(dev, ee->offset, ee->len, data);
 701 }
 702
 703 static int smsc75xx_ethtool_set_eeprom(struct net_device *netdev,
 704                                        struct ethtool_eeprom *ee, u8 *data)
 705 {
 706         struct usbnet *dev = netdev_priv(netdev);
 707
 708         if (ee->magic != LAN75XX_EEPROM_MAGIC) {
 709                 netdev_warn(dev->net, "EEPROM: magic value mismatch: 0x%x\n",
 710                             ee->magic);
 711                 return -EINVAL;
 712         }
 713
 714         return smsc75xx_write_eeprom(dev, ee->offset, ee->len, data);
 715 }
 716
 717 static void smsc75xx_ethtool_get_wol(struct net_device *net,
 718                                      struct ethtool_wolinfo *wolinfo)
 719 {
 720         struct usbnet *dev = netdev_priv(net);
 721         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 722
 723         wolinfo->supported = SUPPORTED_WAKE;
 724         wolinfo->wolopts = pdata->wolopts;
 725 }
 726
 727 static int smsc75xx_ethtool_set_wol(struct net_device *net,
 728                                     struct ethtool_wolinfo *wolinfo)
 729 {
 730         struct usbnet *dev = netdev_priv(net);
 731         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 732         int ret;
 733
 734         pdata->wolopts = wolinfo->wolopts & SUPPORTED_WAKE;
 735
 736         ret = device_set_wakeup_enable(&dev->udev->dev, pdata->wolopts);
 737         if (ret < 0)
 738                 netdev_warn(dev->net, "device_set_wakeup_enable error %d\n", ret);
 739
 740         return ret;
 741 }
 742
 743 static const struct ethtool_ops smsc75xx_ethtool_ops = {
 744         .get_link       = usbnet_get_link,
 745         .nway_reset     = usbnet_nway_reset,
 746         .get_drvinfo    = usbnet_get_drvinfo,
 747         .get_msglevel   = usbnet_get_msglevel,
 748         .set_msglevel   = usbnet_set_msglevel,
 749         .get_eeprom_len = smsc75xx_ethtool_get_eeprom_len,
 750         .get_eeprom     = smsc75xx_ethtool_get_eeprom,
 751         .set_eeprom     = smsc75xx_ethtool_set_eeprom,
 752         .get_wol        = smsc75xx_ethtool_get_wol,
 753         .set_wol        = smsc75xx_ethtool_set_wol,
 754         .get_link_ksettings     = usbnet_get_link_ksettings,
 755         .set_link_ksettings     = usbnet_set_link_ksettings,
 756 };
 757
 758 static int smsc75xx_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
 759 {
 760         struct usbnet *dev = netdev_priv(netdev);
 761
 762         if (!netif_running(netdev))
 763                 return -EINVAL;
 764
 765         return generic_mii_ioctl(&dev->mii, if_mii(rq), cmd, NULL);
 766 }
 767
 768 static void smsc75xx_init_mac_address(struct usbnet *dev)
 769 {
 770         const u8 *mac_addr;
 771
 772         /* maybe the boot loader passed the MAC address in devicetree */
 773         mac_addr = of_get_mac_address(dev->udev->dev.of_node);
 774         if (mac_addr) {
 775                 memcpy(dev->net->dev_addr, mac_addr, ETH_ALEN);
 776                 return;
 777         }
 778
 779         /* try reading mac address from EEPROM */
 780         if (smsc75xx_read_eeprom(dev, EEPROM_MAC_OFFSET, ETH_ALEN,
 781                         dev->net->dev_addr) == 0) {
 782                 if (is_valid_ether_addr(dev->net->dev_addr)) {
 783                         /* eeprom values are valid so use them */
 784                         netif_dbg(dev, ifup, dev->net,
 785                                   "MAC address read from EEPROM\n");
 786                         return;
 787                 }
 788         }
 789
 790         /* no useful static MAC address found. generate a random one */
 791         eth_hw_addr_random(dev->net);
 792         netif_dbg(dev, ifup, dev->net, "MAC address set to eth_random_addr\n");
 793 }
 794
 795 static int smsc75xx_set_mac_address(struct usbnet *dev)
 796 {
 797         u32 addr_lo = dev->net->dev_addr[0] | dev->net->dev_addr[1] << 8 |
 798                 dev->net->dev_addr[2] << 16 | dev->net->dev_addr[3] << 24;
 799         u32 addr_hi = dev->net->dev_addr[4] | dev->net->dev_addr[5] << 8;
 800
 801         int ret = smsc75xx_write_reg(dev, RX_ADDRH, addr_hi);
 802         if (ret < 0) {
 803                 netdev_warn(dev->net, "Failed to write RX_ADDRH: %d\n", ret);
 804                 return ret;
 805         }
 806
 807         ret = smsc75xx_write_reg(dev, RX_ADDRL, addr_lo);
 808         if (ret < 0) {
 809                 netdev_warn(dev->net, "Failed to write RX_ADDRL: %d\n", ret);
 810                 return ret;
 811         }
 812
 813         addr_hi |= ADDR_FILTX_FB_VALID;
 814         ret = smsc75xx_write_reg(dev, ADDR_FILTX, addr_hi);
 815         if (ret < 0) {
 816                 netdev_warn(dev->net, "Failed to write ADDR_FILTX: %d\n", ret);
 817                 return ret;
 818         }
 819
 820         ret = smsc75xx_write_reg(dev, ADDR_FILTX + 4, addr_lo);
 821         if (ret < 0)
 822                 netdev_warn(dev->net, "Failed to write ADDR_FILTX+4: %d\n", ret);
 823
 824         return ret;
 825 }
 826
 827 static int smsc75xx_phy_initialize(struct usbnet *dev)
 828 {
 829         int bmcr, ret, timeout = 0;
 830
 831         /* Initialize MII structure */
 832         dev->mii.dev = dev->net;
 833         dev->mii.mdio_read = smsc75xx_mdio_read;
 834         dev->mii.mdio_write = smsc75xx_mdio_write;
 835         dev->mii.phy_id_mask = 0x1f;
 836         dev->mii.reg_num_mask = 0x1f;
 837         dev->mii.supports_gmii = 1;
 838         dev->mii.phy_id = SMSC75XX_INTERNAL_PHY_ID;
 839
 840         /* reset phy and wait for reset to complete */
 841         smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_BMCR, BMCR_RESET);
 842
 843         do {
 844                 msleep(10);
 845                 bmcr = smsc75xx_mdio_read(dev->net, dev->mii.phy_id, MII_BMCR);
 846                 if (bmcr < 0) {
 847                         netdev_warn(dev->net, "Error reading MII_BMCR\n");
 848                         return bmcr;
 849                 }
 850                 timeout++;
 851         } while ((bmcr & BMCR_RESET) && (timeout < 100));
 852
 853         if (timeout >= 100) {
 854                 netdev_warn(dev->net, "timeout on PHY Reset\n");
 855                 return -EIO;
 856         }
 857
 858         /* phy workaround for gig link */
 859         smsc75xx_phy_gig_workaround(dev);
 860
 861         smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_ADVERTISE,
 862                 ADVERTISE_ALL | ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP |
 863                 ADVERTISE_PAUSE_ASYM);
 864         smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_CTRL1000,
 865                 ADVERTISE_1000FULL);
 866
 867         /* read and write to clear phy interrupt status */
 868         ret = smsc75xx_mdio_read(dev->net, dev->mii.phy_id, PHY_INT_SRC);
 869         if (ret < 0) {
 870                 netdev_warn(dev->net, "Error reading PHY_INT_SRC\n");
 871                 return ret;
 872         }
 873
 874         smsc75xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_SRC, 0xffff);
 875
 876         smsc75xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_MASK,
 877                 PHY_INT_MASK_DEFAULT);
 878         mii_nway_restart(&dev->mii);
 879
 880         netif_dbg(dev, ifup, dev->net, "phy initialised successfully\n");
 881         return 0;
 882 }
 883
 884 static int smsc75xx_set_rx_max_frame_length(struct usbnet *dev, int size)
 885 {
 886         int ret = 0;
 887         u32 buf;
 888         bool rxenabled;
 889
 890         ret = smsc75xx_read_reg(dev, MAC_RX, &buf);
 891         if (ret < 0) {
 892                 netdev_warn(dev->net, "Failed to read MAC_RX: %d\n", ret);
 893                 return ret;
 894         }
 895
 896         rxenabled = ((buf & MAC_RX_RXEN) != 0);
 897
 898         if (rxenabled) {
 899                 buf &= ~MAC_RX_RXEN;
 900                 ret = smsc75xx_write_reg(dev, MAC_RX, buf);
 901                 if (ret < 0) {
 902                         netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
 903                         return ret;
 904                 }
 905         }
 906
 907         /* add 4 to size for FCS */
 908         buf &= ~MAC_RX_MAX_SIZE;
 909         buf |= (((size + 4) << MAC_RX_MAX_SIZE_SHIFT) & MAC_RX_MAX_SIZE);
 910
 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         if (rxenabled) {
 918                 buf |= MAC_RX_RXEN;
 919                 ret = smsc75xx_write_reg(dev, MAC_RX, buf);
 920                 if (ret < 0) {
 921                         netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
 922                         return ret;
 923                 }
 924         }
 925
 926         return 0;
 927 }
 928
 929 static int smsc75xx_change_mtu(struct net_device *netdev, int new_mtu)
 930 {
 931         struct usbnet *dev = netdev_priv(netdev);
 932         int ret;
 933
 934         ret = smsc75xx_set_rx_max_frame_length(dev, new_mtu + ETH_HLEN);
 935         if (ret < 0) {
 936                 netdev_warn(dev->net, "Failed to set mac rx frame length\n");
 937                 return ret;
 938         }
 939
 940         return usbnet_change_mtu(netdev, new_mtu);
 941 }
 942
 943 /* Enable or disable Rx checksum offload engine */
 944 static int smsc75xx_set_features(struct net_device *netdev,
 945         netdev_features_t features)
 946 {
 947         struct usbnet *dev = netdev_priv(netdev);
 948         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 949         unsigned long flags;
 950         int ret;
 951
 952         spin_lock_irqsave(&pdata->rfe_ctl_lock, flags);
 953
 954         if (features & NETIF_F_RXCSUM)
 955                 pdata->rfe_ctl |= RFE_CTL_TCPUDP_CKM | RFE_CTL_IP_CKM;
 956         else
 957                 pdata->rfe_ctl &= ~(RFE_CTL_TCPUDP_CKM | RFE_CTL_IP_CKM);
 958
 959         spin_unlock_irqrestore(&pdata->rfe_ctl_lock, flags);
 960         /* it's racing here! */
 961
 962         ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
 963         if (ret < 0) {
 964                 netdev_warn(dev->net, "Error writing RFE_CTL\n");
 965                 return ret;
 966         }
 967         return 0;
 968 }
 969
 970 static int smsc75xx_wait_ready(struct usbnet *dev, int in_pm)
 971 {
 972         int timeout = 0;
 973
 974         do {
 975                 u32 buf;
 976                 int ret;
 977
 978                 ret = __smsc75xx_read_reg(dev, PMT_CTL, &buf, in_pm);
 979
 980                 if (ret < 0) {
 981                         netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret);
 982                         return ret;
 983                 }
 984
 985                 if (buf & PMT_CTL_DEV_RDY)
 986                         return 0;
 987
 988                 msleep(10);
 989                 timeout++;
 990         } while (timeout < 100);
 991
 992         netdev_warn(dev->net, "timeout waiting for device ready\n");
 993         return -EIO;
 994 }
 995
 996 static int smsc75xx_phy_gig_workaround(struct usbnet *dev)
 997 {
 998         struct mii_if_info *mii = &dev->mii;
 999         int ret = 0, timeout = 0;
1000         u32 buf, link_up = 0;
1001
1002         /* Set the phy in Gig loopback */
1003         smsc75xx_mdio_write(dev->net, mii->phy_id, MII_BMCR, 0x4040);
1004
1005         /* Wait for the link up */
1006         do {
1007                 link_up = smsc75xx_link_ok_nopm(dev);
1008                 usleep_range(10000, 20000);
1009                 timeout++;
1010         } while ((!link_up) && (timeout < 1000));
1011
1012         if (timeout >= 1000) {
1013                 netdev_warn(dev->net, "Timeout waiting for PHY link up\n");
1014                 return -EIO;
1015         }
1016
1017         /* phy reset */
1018         ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
1019         if (ret < 0) {
1020                 netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret);
1021                 return ret;
1022         }
1023
1024         buf |= PMT_CTL_PHY_RST;
1025
1026         ret = smsc75xx_write_reg(dev, PMT_CTL, buf);
1027         if (ret < 0) {
1028                 netdev_warn(dev->net, "Failed to write PMT_CTL: %d\n", ret);
1029                 return ret;
1030         }
1031
1032         timeout = 0;
1033         do {
1034                 usleep_range(10000, 20000);
1035                 ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
1036                 if (ret < 0) {
1037                         netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n",
1038                                     ret);
1039                         return ret;
1040                 }
1041                 timeout++;
1042         } while ((buf & PMT_CTL_PHY_RST) && (timeout < 100));
1043
1044         if (timeout >= 100) {
1045                 netdev_warn(dev->net, "timeout waiting for PHY Reset\n");
1046                 return -EIO;
1047         }
1048
1049         return 0;
1050 }
1051
1052 static int smsc75xx_reset(struct usbnet *dev)
1053 {
1054         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1055         u32 buf;
1056         int ret = 0, timeout;
1057
1058         netif_dbg(dev, ifup, dev->net, "entering smsc75xx_reset\n");
1059
1060         ret = smsc75xx_wait_ready(dev, 0);
1061         if (ret < 0) {
1062                 netdev_warn(dev->net, "device not ready in smsc75xx_reset\n");
1063                 return ret;
1064         }
1065
1066         ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1067         if (ret < 0) {
1068                 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1069                 return ret;
1070         }
1071
1072         buf |= HW_CFG_LRST;
1073
1074         ret = smsc75xx_write_reg(dev, HW_CFG, buf);
1075         if (ret < 0) {
1076                 netdev_warn(dev->net, "Failed to write HW_CFG: %d\n", ret);
1077                 return ret;
1078         }
1079
1080         timeout = 0;
1081         do {
1082                 msleep(10);
1083                 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1084                 if (ret < 0) {
1085                         netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1086                         return ret;
1087                 }
1088                 timeout++;
1089         } while ((buf & HW_CFG_LRST) && (timeout < 100));
1090
1091         if (timeout >= 100) {
1092                 netdev_warn(dev->net, "timeout on completion of Lite Reset\n");
1093                 return -EIO;
1094         }
1095
1096         netif_dbg(dev, ifup, dev->net, "Lite reset complete, resetting PHY\n");
1097
1098         ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
1099         if (ret < 0) {
1100                 netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret);
1101                 return ret;
1102         }
1103
1104         buf |= PMT_CTL_PHY_RST;
1105
1106         ret = smsc75xx_write_reg(dev, PMT_CTL, buf);
1107         if (ret < 0) {
1108                 netdev_warn(dev->net, "Failed to write PMT_CTL: %d\n", ret);
1109                 return ret;
1110         }
1111
1112         timeout = 0;
1113         do {
1114                 msleep(10);
1115                 ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
1116                 if (ret < 0) {
1117                         netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret);
1118                         return ret;
1119                 }
1120                 timeout++;
1121         } while ((buf & PMT_CTL_PHY_RST) && (timeout < 100));
1122
1123         if (timeout >= 100) {
1124                 netdev_warn(dev->net, "timeout waiting for PHY Reset\n");
1125                 return -EIO;
1126         }
1127
1128         netif_dbg(dev, ifup, dev->net, "PHY reset complete\n");
1129
1130         ret = smsc75xx_set_mac_address(dev);
1131         if (ret < 0) {
1132                 netdev_warn(dev->net, "Failed to set mac address\n");
1133                 return ret;
1134         }
1135
1136         netif_dbg(dev, ifup, dev->net, "MAC Address: %pM\n",
1137                   dev->net->dev_addr);
1138
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, "Read Value from HW_CFG : 0x%08x\n",
1146                   buf);
1147
1148         buf |= HW_CFG_BIR;
1149
1150         ret = smsc75xx_write_reg(dev, HW_CFG, buf);
1151         if (ret < 0) {
1152                 netdev_warn(dev->net,  "Failed to write HW_CFG: %d\n", ret);
1153                 return ret;
1154         }
1155
1156         ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1157         if (ret < 0) {
1158                 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1159                 return ret;
1160         }
1161
1162         netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG after writing HW_CFG_BIR: 0x%08x\n",
1163                   buf);
1164
1165         if (!turbo_mode) {
1166                 buf = 0;
1167                 dev->rx_urb_size = MAX_SINGLE_PACKET_SIZE;
1168         } else if (dev->udev->speed == USB_SPEED_HIGH) {
1169                 buf = DEFAULT_HS_BURST_CAP_SIZE / HS_USB_PKT_SIZE;
1170                 dev->rx_urb_size = DEFAULT_HS_BURST_CAP_SIZE;
1171         } else {
1172                 buf = DEFAULT_FS_BURST_CAP_SIZE / FS_USB_PKT_SIZE;
1173                 dev->rx_urb_size = DEFAULT_FS_BURST_CAP_SIZE;
1174         }
1175
1176         netif_dbg(dev, ifup, dev->net, "rx_urb_size=%ld\n",
1177                   (ulong)dev->rx_urb_size);
1178
1179         ret = smsc75xx_write_reg(dev, BURST_CAP, buf);
1180         if (ret < 0) {
1181                 netdev_warn(dev->net, "Failed to write BURST_CAP: %d\n", ret);
1182                 return ret;
1183         }
1184
1185         ret = smsc75xx_read_reg(dev, BURST_CAP, &buf);
1186         if (ret < 0) {
1187                 netdev_warn(dev->net, "Failed to read BURST_CAP: %d\n", ret);
1188                 return ret;
1189         }
1190
1191         netif_dbg(dev, ifup, dev->net,
1192                   "Read Value from BURST_CAP after writing: 0x%08x\n", buf);
1193
1194         ret = smsc75xx_write_reg(dev, BULK_IN_DLY, DEFAULT_BULK_IN_DELAY);
1195         if (ret < 0) {
1196                 netdev_warn(dev->net, "Failed to write BULK_IN_DLY: %d\n", ret);
1197                 return ret;
1198         }
1199
1200         ret = smsc75xx_read_reg(dev, BULK_IN_DLY, &buf);
1201         if (ret < 0) {
1202                 netdev_warn(dev->net, "Failed to read BULK_IN_DLY: %d\n", ret);
1203                 return ret;
1204         }
1205
1206         netif_dbg(dev, ifup, dev->net,
1207                   "Read Value from BULK_IN_DLY after writing: 0x%08x\n", buf);
1208
1209         if (turbo_mode) {
1210                 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1211                 if (ret < 0) {
1212                         netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1213                         return ret;
1214                 }
1215
1216                 netif_dbg(dev, ifup, dev->net, "HW_CFG: 0x%08x\n", buf);
1217
1218                 buf |= (HW_CFG_MEF | HW_CFG_BCE);
1219
1220                 ret = smsc75xx_write_reg(dev, HW_CFG, buf);
1221                 if (ret < 0) {
1222                         netdev_warn(dev->net, "Failed to write HW_CFG: %d\n", ret);
1223                         return ret;
1224                 }
1225
1226                 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1227                 if (ret < 0) {
1228                         netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1229                         return ret;
1230                 }
1231
1232                 netif_dbg(dev, ifup, dev->net, "HW_CFG: 0x%08x\n", buf);
1233         }
1234
1235         /* set FIFO sizes */
1236         buf = (MAX_RX_FIFO_SIZE - 512) / 512;
1237         ret = smsc75xx_write_reg(dev, FCT_RX_FIFO_END, buf);
1238         if (ret < 0) {
1239                 netdev_warn(dev->net, "Failed to write FCT_RX_FIFO_END: %d\n", ret);
1240                 return ret;
1241         }
1242
1243         netif_dbg(dev, ifup, dev->net, "FCT_RX_FIFO_END set to 0x%08x\n", buf);
1244
1245         buf = (MAX_TX_FIFO_SIZE - 512) / 512;
1246         ret = smsc75xx_write_reg(dev, FCT_TX_FIFO_END, buf);
1247         if (ret < 0) {
1248                 netdev_warn(dev->net, "Failed to write FCT_TX_FIFO_END: %d\n", ret);
1249                 return ret;
1250         }
1251
1252         netif_dbg(dev, ifup, dev->net, "FCT_TX_FIFO_END set to 0x%08x\n", buf);
1253
1254         ret = smsc75xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL);
1255         if (ret < 0) {
1256                 netdev_warn(dev->net, "Failed to write INT_STS: %d\n", ret);
1257                 return ret;
1258         }
1259
1260         ret = smsc75xx_read_reg(dev, ID_REV, &buf);
1261         if (ret < 0) {
1262                 netdev_warn(dev->net, "Failed to read ID_REV: %d\n", ret);
1263                 return ret;
1264         }
1265
1266         netif_dbg(dev, ifup, dev->net, "ID_REV = 0x%08x\n", buf);
1267
1268         ret = smsc75xx_read_reg(dev, E2P_CMD, &buf);
1269         if (ret < 0) {
1270                 netdev_warn(dev->net, "Failed to read E2P_CMD: %d\n", ret);
1271                 return ret;
1272         }
1273
1274         /* only set default GPIO/LED settings if no EEPROM is detected */
1275         if (!(buf & E2P_CMD_LOADED)) {
1276                 ret = smsc75xx_read_reg(dev, LED_GPIO_CFG, &buf);
1277                 if (ret < 0) {
1278                         netdev_warn(dev->net, "Failed to read LED_GPIO_CFG: %d\n", ret);
1279                         return ret;
1280                 }
1281
1282                 buf &= ~(LED_GPIO_CFG_LED2_FUN_SEL | LED_GPIO_CFG_LED10_FUN_SEL);
1283                 buf |= LED_GPIO_CFG_LEDGPIO_EN | LED_GPIO_CFG_LED2_FUN_SEL;
1284
1285                 ret = smsc75xx_write_reg(dev, LED_GPIO_CFG, buf);
1286                 if (ret < 0) {
1287                         netdev_warn(dev->net, "Failed to write LED_GPIO_CFG: %d\n", ret);
1288                         return ret;
1289                 }
1290         }
1291
1292         ret = smsc75xx_write_reg(dev, FLOW, 0);
1293         if (ret < 0) {
1294                 netdev_warn(dev->net, "Failed to write FLOW: %d\n", ret);
1295                 return ret;
1296         }
1297
1298         ret = smsc75xx_write_reg(dev, FCT_FLOW, 0);
1299         if (ret < 0) {
1300                 netdev_warn(dev->net, "Failed to write FCT_FLOW: %d\n", ret);
1301                 return ret;
1302         }
1303
1304         /* Don't need rfe_ctl_lock during initialisation */
1305         ret = smsc75xx_read_reg(dev, RFE_CTL, &pdata->rfe_ctl);
1306         if (ret < 0) {
1307                 netdev_warn(dev->net, "Failed to read RFE_CTL: %d\n", ret);
1308                 return ret;
1309         }
1310
1311         pdata->rfe_ctl |= RFE_CTL_AB | RFE_CTL_DPF;
1312
1313         ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
1314         if (ret < 0) {
1315                 netdev_warn(dev->net, "Failed to write RFE_CTL: %d\n", ret);
1316                 return ret;
1317         }
1318
1319         ret = smsc75xx_read_reg(dev, RFE_CTL, &pdata->rfe_ctl);
1320         if (ret < 0) {
1321                 netdev_warn(dev->net, "Failed to read RFE_CTL: %d\n", ret);
1322                 return ret;
1323         }
1324
1325         netif_dbg(dev, ifup, dev->net, "RFE_CTL set to 0x%08x\n",
1326                   pdata->rfe_ctl);
1327
1328         /* Enable or disable checksum offload engines */
1329         smsc75xx_set_features(dev->net, dev->net->features);
1330
1331         smsc75xx_set_multicast(dev->net);
1332
1333         ret = smsc75xx_phy_initialize(dev);
1334         if (ret < 0) {
1335                 netdev_warn(dev->net, "Failed to initialize PHY: %d\n", ret);
1336                 return ret;
1337         }
1338
1339         ret = smsc75xx_read_reg(dev, INT_EP_CTL, &buf);
1340         if (ret < 0) {
1341                 netdev_warn(dev->net, "Failed to read INT_EP_CTL: %d\n", ret);
1342                 return ret;
1343         }
1344
1345         /* enable PHY interrupts */
1346         buf |= INT_ENP_PHY_INT;
1347
1348         ret = smsc75xx_write_reg(dev, INT_EP_CTL, buf);
1349         if (ret < 0) {
1350                 netdev_warn(dev->net, "Failed to write INT_EP_CTL: %d\n", ret);
1351                 return ret;
1352         }
1353
1354         /* allow mac to detect speed and duplex from phy */
1355         ret = smsc75xx_read_reg(dev, MAC_CR, &buf);
1356         if (ret < 0) {
1357                 netdev_warn(dev->net, "Failed to read MAC_CR: %d\n", ret);
1358                 return ret;
1359         }
1360
1361         buf |= (MAC_CR_ADD | MAC_CR_ASD);
1362         ret = smsc75xx_write_reg(dev, MAC_CR, buf);
1363         if (ret < 0) {
1364                 netdev_warn(dev->net, "Failed to write MAC_CR: %d\n", ret);
1365                 return ret;
1366         }
1367
1368         ret = smsc75xx_read_reg(dev, MAC_TX, &buf);
1369         if (ret < 0) {
1370                 netdev_warn(dev->net, "Failed to read MAC_TX: %d\n", ret);
1371                 return ret;
1372         }
1373
1374         buf |= MAC_TX_TXEN;
1375
1376         ret = smsc75xx_write_reg(dev, MAC_TX, buf);
1377         if (ret < 0) {
1378                 netdev_warn(dev->net, "Failed to write MAC_TX: %d\n", ret);
1379                 return ret;
1380         }
1381
1382         netif_dbg(dev, ifup, dev->net, "MAC_TX set to 0x%08x\n", buf);
1383
1384         ret = smsc75xx_read_reg(dev, FCT_TX_CTL, &buf);
1385         if (ret < 0) {
1386                 netdev_warn(dev->net, "Failed to read FCT_TX_CTL: %d\n", ret);
1387                 return ret;
1388         }
1389
1390         buf |= FCT_TX_CTL_EN;
1391
1392         ret = smsc75xx_write_reg(dev, FCT_TX_CTL, buf);
1393         if (ret < 0) {
1394                 netdev_warn(dev->net, "Failed to write FCT_TX_CTL: %d\n", ret);
1395                 return ret;
1396         }
1397
1398         netif_dbg(dev, ifup, dev->net, "FCT_TX_CTL set to 0x%08x\n", buf);
1399
1400         ret = smsc75xx_set_rx_max_frame_length(dev, dev->net->mtu + ETH_HLEN);
1401         if (ret < 0) {
1402                 netdev_warn(dev->net, "Failed to set max rx frame length\n");
1403                 return ret;
1404         }
1405
1406         ret = smsc75xx_read_reg(dev, MAC_RX, &buf);
1407         if (ret < 0) {
1408                 netdev_warn(dev->net, "Failed to read MAC_RX: %d\n", ret);
1409                 return ret;
1410         }
1411
1412         buf |= MAC_RX_RXEN;
1413
1414         ret = smsc75xx_write_reg(dev, MAC_RX, buf);
1415         if (ret < 0) {
1416                 netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
1417                 return ret;
1418         }
1419
1420         netif_dbg(dev, ifup, dev->net, "MAC_RX set to 0x%08x\n", buf);
1421
1422         ret = smsc75xx_read_reg(dev, FCT_RX_CTL, &buf);
1423         if (ret < 0) {
1424                 netdev_warn(dev->net, "Failed to read FCT_RX_CTL: %d\n", ret);
1425                 return ret;
1426         }
1427
1428         buf |= FCT_RX_CTL_EN;
1429
1430         ret = smsc75xx_write_reg(dev, FCT_RX_CTL, buf);
1431         if (ret < 0) {
1432                 netdev_warn(dev->net, "Failed to write FCT_RX_CTL: %d\n", ret);
1433                 return ret;
1434         }
1435
1436         netif_dbg(dev, ifup, dev->net, "FCT_RX_CTL set to 0x%08x\n", buf);
1437
1438         netif_dbg(dev, ifup, dev->net, "smsc75xx_reset, return 0\n");
1439         return 0;
1440 }
1441
1442 static const struct net_device_ops smsc75xx_netdev_ops = {
1443         .ndo_open               = usbnet_open,
1444         .ndo_stop               = usbnet_stop,
1445         .ndo_start_xmit         = usbnet_start_xmit,
1446         .ndo_tx_timeout         = usbnet_tx_timeout,
1447         .ndo_get_stats64        = usbnet_get_stats64,
1448         .ndo_change_mtu         = smsc75xx_change_mtu,
1449         .ndo_set_mac_address    = eth_mac_addr,
1450         .ndo_validate_addr      = eth_validate_addr,
1451         .ndo_do_ioctl           = smsc75xx_ioctl,
1452         .ndo_set_rx_mode        = smsc75xx_set_multicast,
1453         .ndo_set_features       = smsc75xx_set_features,
1454 };
1455
1456 static int smsc75xx_bind(struct usbnet *dev, struct usb_interface *intf)
1457 {
1458         struct smsc75xx_priv *pdata = NULL;
1459         int ret;
1460
1461         printk(KERN_INFO SMSC_CHIPNAME " v" SMSC_DRIVER_VERSION "\n");
1462
1463         ret = usbnet_get_endpoints(dev, intf);
1464         if (ret < 0) {
1465                 netdev_warn(dev->net, "usbnet_get_endpoints failed: %d\n", ret);
1466                 return ret;
1467         }
1468
1469         dev->data[0] = (unsigned long)kzalloc(sizeof(struct smsc75xx_priv),
1470                                               GFP_KERNEL);
1471
1472         pdata = (struct smsc75xx_priv *)(dev->data[0]);
1473         if (!pdata)
1474                 return -ENOMEM;
1475
1476         pdata->dev = dev;
1477
1478         spin_lock_init(&pdata->rfe_ctl_lock);
1479         mutex_init(&pdata->dataport_mutex);
1480
1481         INIT_WORK(&pdata->set_multicast, smsc75xx_deferred_multicast_write);
1482
1483         if (DEFAULT_TX_CSUM_ENABLE)
1484                 dev->net->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
1485
1486         if (DEFAULT_RX_CSUM_ENABLE)
1487                 dev->net->features |= NETIF_F_RXCSUM;
1488
1489         dev->net->hw_features = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
1490                                 NETIF_F_RXCSUM;
1491
1492         ret = smsc75xx_wait_ready(dev, 0);
1493         if (ret < 0) {
1494                 netdev_warn(dev->net, "device not ready in smsc75xx_bind\n");
1495                 return ret;
1496         }
1497
1498         smsc75xx_init_mac_address(dev);
1499
1500         /* Init all registers */
1501         ret = smsc75xx_reset(dev);
1502         if (ret < 0) {
1503                 netdev_warn(dev->net, "smsc75xx_reset error %d\n", ret);
1504                 return ret;
1505         }
1506
1507         dev->net->netdev_ops = &smsc75xx_netdev_ops;
1508         dev->net->ethtool_ops = &smsc75xx_ethtool_ops;
1509         dev->net->flags |= IFF_MULTICAST;
1510         dev->net->hard_header_len += SMSC75XX_TX_OVERHEAD;
1511         dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len;
1512         dev->net->max_mtu = MAX_SINGLE_PACKET_SIZE;
1513         return 0;
1514 }
1515
1516 static void smsc75xx_unbind(struct usbnet *dev, struct usb_interface *intf)
1517 {
1518         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1519         if (pdata) {
1520                 netif_dbg(dev, ifdown, dev->net, "free pdata\n");
1521                 kfree(pdata);
1522                 pdata = NULL;
1523                 dev->data[0] = 0;
1524         }
1525 }
1526
1527 static u16 smsc_crc(const u8 *buffer, size_t len)
1528 {
1529         return bitrev16(crc16(0xFFFF, buffer, len));
1530 }
1531
1532 static int smsc75xx_write_wuff(struct usbnet *dev, int filter, u32 wuf_cfg,
1533                                u32 wuf_mask1)
1534 {
1535         int cfg_base = WUF_CFGX + filter * 4;
1536         int mask_base = WUF_MASKX + filter * 16;
1537         int ret;
1538
1539         ret = smsc75xx_write_reg(dev, cfg_base, wuf_cfg);
1540         if (ret < 0) {
1541                 netdev_warn(dev->net, "Error writing WUF_CFGX\n");
1542                 return ret;
1543         }
1544
1545         ret = smsc75xx_write_reg(dev, mask_base, wuf_mask1);
1546         if (ret < 0) {
1547                 netdev_warn(dev->net, "Error writing WUF_MASKX\n");
1548                 return ret;
1549         }
1550
1551         ret = smsc75xx_write_reg(dev, mask_base + 4, 0);
1552         if (ret < 0) {
1553                 netdev_warn(dev->net, "Error writing WUF_MASKX\n");
1554                 return ret;
1555         }
1556
1557         ret = smsc75xx_write_reg(dev, mask_base + 8, 0);
1558         if (ret < 0) {
1559                 netdev_warn(dev->net, "Error writing WUF_MASKX\n");
1560                 return ret;
1561         }
1562
1563         ret = smsc75xx_write_reg(dev, mask_base + 12, 0);
1564         if (ret < 0) {
1565                 netdev_warn(dev->net, "Error writing WUF_MASKX\n");
1566                 return ret;
1567         }
1568
1569         return 0;
1570 }
1571
1572 static int smsc75xx_enter_suspend0(struct usbnet *dev)
1573 {
1574         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1575         u32 val;
1576         int ret;
1577
1578         ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1579         if (ret < 0) {
1580                 netdev_warn(dev->net, "Error reading PMT_CTL\n");
1581                 return ret;
1582         }
1583
1584         val &= (~(PMT_CTL_SUS_MODE | PMT_CTL_PHY_RST));
1585         val |= PMT_CTL_SUS_MODE_0 | PMT_CTL_WOL_EN | PMT_CTL_WUPS;
1586
1587         ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1588         if (ret < 0) {
1589                 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1590                 return ret;
1591         }
1592
1593         pdata->suspend_flags |= SUSPEND_SUSPEND0;
1594
1595         return 0;
1596 }
1597
1598 static int smsc75xx_enter_suspend1(struct usbnet *dev)
1599 {
1600         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1601         u32 val;
1602         int ret;
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_1;
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, enable energy detection */
1620         val &= ~PMT_CTL_WUPS;
1621         val |= (PMT_CTL_WUPS_ED | PMT_CTL_ED_EN);
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_SUSPEND1;
1630
1631         return 0;
1632 }
1633
1634 static int smsc75xx_enter_suspend2(struct usbnet *dev)
1635 {
1636         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1637         u32 val;
1638         int ret;
1639
1640         ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1641         if (ret < 0) {
1642                 netdev_warn(dev->net, "Error reading PMT_CTL\n");
1643                 return ret;
1644         }
1645
1646         val &= ~(PMT_CTL_SUS_MODE | PMT_CTL_WUPS | PMT_CTL_PHY_RST);
1647         val |= PMT_CTL_SUS_MODE_2;
1648
1649         ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1650         if (ret < 0) {
1651                 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1652                 return ret;
1653         }
1654
1655         pdata->suspend_flags |= SUSPEND_SUSPEND2;
1656
1657         return 0;
1658 }
1659
1660 static int smsc75xx_enter_suspend3(struct usbnet *dev)
1661 {
1662         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1663         u32 val;
1664         int ret;
1665
1666         ret = smsc75xx_read_reg_nopm(dev, FCT_RX_CTL, &val);
1667         if (ret < 0) {
1668                 netdev_warn(dev->net, "Error reading FCT_RX_CTL\n");
1669                 return ret;
1670         }
1671
1672         if (val & FCT_RX_CTL_RXUSED) {
1673                 netdev_dbg(dev->net, "rx fifo not empty in autosuspend\n");
1674                 return -EBUSY;
1675         }
1676
1677         ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1678         if (ret < 0) {
1679                 netdev_warn(dev->net, "Error reading PMT_CTL\n");
1680                 return ret;
1681         }
1682
1683         val &= ~(PMT_CTL_SUS_MODE | PMT_CTL_WUPS | PMT_CTL_PHY_RST);
1684         val |= PMT_CTL_SUS_MODE_3 | PMT_CTL_RES_CLR_WKP_EN;
1685
1686         ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1687         if (ret < 0) {
1688                 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1689                 return ret;
1690         }
1691
1692         /* clear wol status */
1693         val &= ~PMT_CTL_WUPS;
1694         val |= PMT_CTL_WUPS_WOL;
1695
1696         ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1697         if (ret < 0) {
1698                 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1699                 return ret;
1700         }
1701
1702         pdata->suspend_flags |= SUSPEND_SUSPEND3;
1703
1704         return 0;
1705 }
1706
1707 static int smsc75xx_enable_phy_wakeup_interrupts(struct usbnet *dev, u16 mask)
1708 {
1709         struct mii_if_info *mii = &dev->mii;
1710         int ret;
1711
1712         netdev_dbg(dev->net, "enabling PHY wakeup interrupts\n");
1713
1714         /* read to clear */
1715         ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_SRC);
1716         if (ret < 0) {
1717                 netdev_warn(dev->net, "Error reading PHY_INT_SRC\n");
1718                 return ret;
1719         }
1720
1721         /* enable interrupt source */
1722         ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_MASK);
1723         if (ret < 0) {
1724                 netdev_warn(dev->net, "Error reading PHY_INT_MASK\n");
1725                 return ret;
1726         }
1727
1728         ret |= mask;
1729
1730         smsc75xx_mdio_write_nopm(dev->net, mii->phy_id, PHY_INT_MASK, ret);
1731
1732         return 0;
1733 }
1734
1735 static int smsc75xx_link_ok_nopm(struct usbnet *dev)
1736 {
1737         struct mii_if_info *mii = &dev->mii;
1738         int ret;
1739
1740         /* first, a dummy read, needed to latch some MII phys */
1741         ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR);
1742         if (ret < 0) {
1743                 netdev_warn(dev->net, "Error reading MII_BMSR\n");
1744                 return ret;
1745         }
1746
1747         ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR);
1748         if (ret < 0) {
1749                 netdev_warn(dev->net, "Error reading MII_BMSR\n");
1750                 return ret;
1751         }
1752
1753         return !!(ret & BMSR_LSTATUS);
1754 }
1755
1756 static int smsc75xx_autosuspend(struct usbnet *dev, u32 link_up)
1757 {
1758         int ret;
1759
1760         if (!netif_running(dev->net)) {
1761                 /* interface is ifconfig down so fully power down hw */
1762                 netdev_dbg(dev->net, "autosuspend entering SUSPEND2\n");
1763                 return smsc75xx_enter_suspend2(dev);
1764         }
1765
1766         if (!link_up) {
1767                 /* link is down so enter EDPD mode */
1768                 netdev_dbg(dev->net, "autosuspend entering SUSPEND1\n");
1769
1770                 /* enable PHY wakeup events for if cable is attached */
1771                 ret = smsc75xx_enable_phy_wakeup_interrupts(dev,
1772                         PHY_INT_MASK_ANEG_COMP);
1773                 if (ret < 0) {
1774                         netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1775                         return ret;
1776                 }
1777
1778                 netdev_info(dev->net, "entering SUSPEND1 mode\n");
1779                 return smsc75xx_enter_suspend1(dev);
1780         }
1781
1782         /* enable PHY wakeup events so we remote wakeup if cable is pulled */
1783         ret = smsc75xx_enable_phy_wakeup_interrupts(dev,
1784                 PHY_INT_MASK_LINK_DOWN);
1785         if (ret < 0) {
1786                 netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1787                 return ret;
1788         }
1789
1790         netdev_dbg(dev->net, "autosuspend entering SUSPEND3\n");
1791         return smsc75xx_enter_suspend3(dev);
1792 }
1793
1794 static int smsc75xx_suspend(struct usb_interface *intf, pm_message_t message)
1795 {
1796         struct usbnet *dev = usb_get_intfdata(intf);
1797         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1798         u32 val, link_up;
1799         int ret;
1800
1801         ret = usbnet_suspend(intf, message);
1802         if (ret < 0) {
1803                 netdev_warn(dev->net, "usbnet_suspend error\n");
1804                 return ret;
1805         }
1806
1807         if (pdata->suspend_flags) {
1808                 netdev_warn(dev->net, "error during last resume\n");
1809                 pdata->suspend_flags = 0;
1810         }
1811
1812         /* determine if link is up using only _nopm functions */
1813         link_up = smsc75xx_link_ok_nopm(dev);
1814
1815         if (message.event == PM_EVENT_AUTO_SUSPEND) {
1816                 ret = smsc75xx_autosuspend(dev, link_up);
1817                 goto done;
1818         }
1819
1820         /* if we get this far we're not autosuspending */
1821         /* if no wol options set, or if link is down and we're not waking on
1822          * PHY activity, enter lowest power SUSPEND2 mode
1823          */
1824         if (!(pdata->wolopts & SUPPORTED_WAKE) ||
1825                 !(link_up || (pdata->wolopts & WAKE_PHY))) {
1826                 netdev_info(dev->net, "entering SUSPEND2 mode\n");
1827
1828                 /* disable energy detect (link up) & wake up events */
1829                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1830                 if (ret < 0) {
1831                         netdev_warn(dev->net, "Error reading WUCSR\n");
1832                         goto done;
1833                 }
1834
1835                 val &= ~(WUCSR_MPEN | WUCSR_WUEN);
1836
1837                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1838                 if (ret < 0) {
1839                         netdev_warn(dev->net, "Error writing WUCSR\n");
1840                         goto done;
1841                 }
1842
1843                 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1844                 if (ret < 0) {
1845                         netdev_warn(dev->net, "Error reading PMT_CTL\n");
1846                         goto done;
1847                 }
1848
1849                 val &= ~(PMT_CTL_ED_EN | PMT_CTL_WOL_EN);
1850
1851                 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1852                 if (ret < 0) {
1853                         netdev_warn(dev->net, "Error writing PMT_CTL\n");
1854                         goto done;
1855                 }
1856
1857                 ret = smsc75xx_enter_suspend2(dev);
1858                 goto done;
1859         }
1860
1861         if (pdata->wolopts & WAKE_PHY) {
1862                 ret = smsc75xx_enable_phy_wakeup_interrupts(dev,
1863                         (PHY_INT_MASK_ANEG_COMP | PHY_INT_MASK_LINK_DOWN));
1864                 if (ret < 0) {
1865                         netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1866                         goto done;
1867                 }
1868
1869                 /* if link is down then configure EDPD and enter SUSPEND1,
1870                  * otherwise enter SUSPEND0 below
1871                  */
1872                 if (!link_up) {
1873                         struct mii_if_info *mii = &dev->mii;
1874                         netdev_info(dev->net, "entering SUSPEND1 mode\n");
1875
1876                         /* enable energy detect power-down mode */
1877                         ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id,
1878                                 PHY_MODE_CTRL_STS);
1879                         if (ret < 0) {
1880                                 netdev_warn(dev->net, "Error reading PHY_MODE_CTRL_STS\n");
1881                                 goto done;
1882                         }
1883
1884                         ret |= MODE_CTRL_STS_EDPWRDOWN;
1885
1886                         smsc75xx_mdio_write_nopm(dev->net, mii->phy_id,
1887                                 PHY_MODE_CTRL_STS, ret);
1888
1889                         /* enter SUSPEND1 mode */
1890                         ret = smsc75xx_enter_suspend1(dev);
1891                         goto done;
1892                 }
1893         }
1894
1895         if (pdata->wolopts & (WAKE_MCAST | WAKE_ARP)) {
1896                 int i, filter = 0;
1897
1898                 /* disable all filters */
1899                 for (i = 0; i < WUF_NUM; i++) {
1900                         ret = smsc75xx_write_reg_nopm(dev, WUF_CFGX + i * 4, 0);
1901                         if (ret < 0) {
1902                                 netdev_warn(dev->net, "Error writing WUF_CFGX\n");
1903                                 goto done;
1904                         }
1905                 }
1906
1907                 if (pdata->wolopts & WAKE_MCAST) {
1908                         const u8 mcast[] = {0x01, 0x00, 0x5E};
1909                         netdev_info(dev->net, "enabling multicast detection\n");
1910
1911                         val = WUF_CFGX_EN | WUF_CFGX_ATYPE_MULTICAST
1912                                 | smsc_crc(mcast, 3);
1913                         ret = smsc75xx_write_wuff(dev, filter++, val, 0x0007);
1914                         if (ret < 0) {
1915                                 netdev_warn(dev->net, "Error writing wakeup filter\n");
1916                                 goto done;
1917                         }
1918                 }
1919
1920                 if (pdata->wolopts & WAKE_ARP) {
1921                         const u8 arp[] = {0x08, 0x06};
1922                         netdev_info(dev->net, "enabling ARP detection\n");
1923
1924                         val = WUF_CFGX_EN | WUF_CFGX_ATYPE_ALL | (0x0C << 16)
1925                                 | smsc_crc(arp, 2);
1926                         ret = smsc75xx_write_wuff(dev, filter++, val, 0x0003);
1927                         if (ret < 0) {
1928                                 netdev_warn(dev->net, "Error writing wakeup filter\n");
1929                                 goto done;
1930                         }
1931                 }
1932
1933                 /* clear any pending pattern match packet status */
1934                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1935                 if (ret < 0) {
1936                         netdev_warn(dev->net, "Error reading WUCSR\n");
1937                         goto done;
1938                 }
1939
1940                 val |= WUCSR_WUFR;
1941
1942                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1943                 if (ret < 0) {
1944                         netdev_warn(dev->net, "Error writing WUCSR\n");
1945                         goto done;
1946                 }
1947
1948                 netdev_info(dev->net, "enabling packet match detection\n");
1949                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1950                 if (ret < 0) {
1951                         netdev_warn(dev->net, "Error reading WUCSR\n");
1952                         goto done;
1953                 }
1954
1955                 val |= WUCSR_WUEN;
1956
1957                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1958                 if (ret < 0) {
1959                         netdev_warn(dev->net, "Error writing WUCSR\n");
1960                         goto done;
1961                 }
1962         } else {
1963                 netdev_info(dev->net, "disabling packet match detection\n");
1964                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1965                 if (ret < 0) {
1966                         netdev_warn(dev->net, "Error reading WUCSR\n");
1967                         goto done;
1968                 }
1969
1970                 val &= ~WUCSR_WUEN;
1971
1972                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1973                 if (ret < 0) {
1974                         netdev_warn(dev->net, "Error writing WUCSR\n");
1975                         goto done;
1976                 }
1977         }
1978
1979         /* disable magic, bcast & unicast wakeup sources */
1980         ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1981         if (ret < 0) {
1982                 netdev_warn(dev->net, "Error reading WUCSR\n");
1983                 goto done;
1984         }
1985
1986         val &= ~(WUCSR_MPEN | WUCSR_BCST_EN | WUCSR_PFDA_EN);
1987
1988         ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1989         if (ret < 0) {
1990                 netdev_warn(dev->net, "Error writing WUCSR\n");
1991                 goto done;
1992         }
1993
1994         if (pdata->wolopts & WAKE_PHY) {
1995                 netdev_info(dev->net, "enabling PHY wakeup\n");
1996
1997                 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1998                 if (ret < 0) {
1999                         netdev_warn(dev->net, "Error reading PMT_CTL\n");
2000                         goto done;
2001                 }
2002
2003                 /* clear wol status, enable energy detection */
2004                 val &= ~PMT_CTL_WUPS;
2005                 val |= (PMT_CTL_WUPS_ED | PMT_CTL_ED_EN);
2006
2007                 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
2008                 if (ret < 0) {
2009                         netdev_warn(dev->net, "Error writing PMT_CTL\n");
2010                         goto done;
2011                 }
2012         }
2013
2014         if (pdata->wolopts & WAKE_MAGIC) {
2015                 netdev_info(dev->net, "enabling magic packet wakeup\n");
2016                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
2017                 if (ret < 0) {
2018                         netdev_warn(dev->net, "Error reading WUCSR\n");
2019                         goto done;
2020                 }
2021
2022                 /* clear any pending magic packet status */
2023                 val |= WUCSR_MPR | WUCSR_MPEN;
2024
2025                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
2026                 if (ret < 0) {
2027                         netdev_warn(dev->net, "Error writing WUCSR\n");
2028                         goto done;
2029                 }
2030         }
2031
2032         if (pdata->wolopts & WAKE_BCAST) {
2033                 netdev_info(dev->net, "enabling broadcast detection\n");
2034                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
2035                 if (ret < 0) {
2036                         netdev_warn(dev->net, "Error reading WUCSR\n");
2037                         goto done;
2038                 }
2039
2040                 val |= WUCSR_BCAST_FR | WUCSR_BCST_EN;
2041
2042                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
2043                 if (ret < 0) {
2044                         netdev_warn(dev->net, "Error writing WUCSR\n");
2045                         goto done;
2046                 }
2047         }
2048
2049         if (pdata->wolopts & WAKE_UCAST) {
2050                 netdev_info(dev->net, "enabling unicast detection\n");
2051                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
2052                 if (ret < 0) {
2053                         netdev_warn(dev->net, "Error reading WUCSR\n");
2054                         goto done;
2055                 }
2056
2057                 val |= WUCSR_WUFR | WUCSR_PFDA_EN;
2058
2059                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
2060                 if (ret < 0) {
2061                         netdev_warn(dev->net, "Error writing WUCSR\n");
2062                         goto done;
2063                 }
2064         }
2065
2066         /* enable receiver to enable frame reception */
2067         ret = smsc75xx_read_reg_nopm(dev, MAC_RX, &val);
2068         if (ret < 0) {
2069                 netdev_warn(dev->net, "Failed to read MAC_RX: %d\n", ret);
2070                 goto done;
2071         }
2072
2073         val |= MAC_RX_RXEN;
2074
2075         ret = smsc75xx_write_reg_nopm(dev, MAC_RX, val);
2076         if (ret < 0) {
2077                 netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
2078                 goto done;
2079         }
2080
2081         /* some wol options are enabled, so enter SUSPEND0 */
2082         netdev_info(dev->net, "entering SUSPEND0 mode\n");
2083         ret = smsc75xx_enter_suspend0(dev);
2084
2085 done:
2086         /*
2087          * TODO: resume() might need to handle the suspend failure
2088          * in system sleep
2089          */
2090         if (ret && PMSG_IS_AUTO(message))
2091                 usbnet_resume(intf);
2092         return ret;
2093 }
2094
2095 static int smsc75xx_resume(struct usb_interface *intf)
2096 {
2097         struct usbnet *dev = usb_get_intfdata(intf);
2098         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
2099         u8 suspend_flags = pdata->suspend_flags;
2100         int ret;
2101         u32 val;
2102
2103         netdev_dbg(dev->net, "resume suspend_flags=0x%02x\n", suspend_flags);
2104
2105         /* do this first to ensure it's cleared even in error case */
2106         pdata->suspend_flags = 0;
2107
2108         if (suspend_flags & SUSPEND_ALLMODES) {
2109                 /* Disable wakeup sources */
2110                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
2111                 if (ret < 0) {
2112                         netdev_warn(dev->net, "Error reading WUCSR\n");
2113                         return ret;
2114                 }
2115
2116                 val &= ~(WUCSR_WUEN | WUCSR_MPEN | WUCSR_PFDA_EN
2117                         | WUCSR_BCST_EN);
2118
2119                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
2120                 if (ret < 0) {
2121                         netdev_warn(dev->net, "Error writing WUCSR\n");
2122                         return ret;
2123                 }
2124
2125                 /* clear wake-up status */
2126                 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
2127                 if (ret < 0) {
2128                         netdev_warn(dev->net, "Error reading PMT_CTL\n");
2129                         return ret;
2130                 }
2131
2132                 val &= ~PMT_CTL_WOL_EN;
2133                 val |= PMT_CTL_WUPS;
2134
2135                 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
2136                 if (ret < 0) {
2137                         netdev_warn(dev->net, "Error writing PMT_CTL\n");
2138                         return ret;
2139                 }
2140         }
2141
2142         if (suspend_flags & SUSPEND_SUSPEND2) {
2143                 netdev_info(dev->net, "resuming from SUSPEND2\n");
2144
2145                 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
2146                 if (ret < 0) {
2147                         netdev_warn(dev->net, "Error reading PMT_CTL\n");
2148                         return ret;
2149                 }
2150
2151                 val |= PMT_CTL_PHY_PWRUP;
2152
2153                 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
2154                 if (ret < 0) {
2155                         netdev_warn(dev->net, "Error writing PMT_CTL\n");
2156                         return ret;
2157                 }
2158         }
2159
2160         ret = smsc75xx_wait_ready(dev, 1);
2161         if (ret < 0) {
2162                 netdev_warn(dev->net, "device not ready in smsc75xx_resume\n");
2163                 return ret;
2164         }
2165
2166         return usbnet_resume(intf);
2167 }
2168
2169 static void smsc75xx_rx_csum_offload(struct usbnet *dev, struct sk_buff *skb,
2170                                      u32 rx_cmd_a, u32 rx_cmd_b)
2171 {
2172         if (!(dev->net->features & NETIF_F_RXCSUM) ||
2173             unlikely(rx_cmd_a & RX_CMD_A_LCSM)) {
2174                 skb->ip_summed = CHECKSUM_NONE;
2175         } else {
2176                 skb->csum = ntohs((u16)(rx_cmd_b >> RX_CMD_B_CSUM_SHIFT));
2177                 skb->ip_summed = CHECKSUM_COMPLETE;
2178         }
2179 }
2180
2181 static int smsc75xx_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
2182 {
2183         /* This check is no longer done by usbnet */
2184         if (skb->len < dev->net->hard_header_len)
2185                 return 0;
2186
2187         while (skb->len > 0) {
2188                 u32 rx_cmd_a, rx_cmd_b, align_count, size;
2189                 struct sk_buff *ax_skb;
2190                 unsigned char *packet;
2191
2192                 memcpy(&rx_cmd_a, skb->data, sizeof(rx_cmd_a));
2193                 le32_to_cpus(&rx_cmd_a);
2194                 skb_pull(skb, 4);
2195
2196                 memcpy(&rx_cmd_b, skb->data, sizeof(rx_cmd_b));
2197                 le32_to_cpus(&rx_cmd_b);
2198                 skb_pull(skb, 4 + RXW_PADDING);
2199
2200                 packet = skb->data;
2201
2202                 /* get the packet length */
2203                 size = (rx_cmd_a & RX_CMD_A_LEN) - RXW_PADDING;
2204                 align_count = (4 - ((size + RXW_PADDING) % 4)) % 4;
2205
2206                 if (unlikely(rx_cmd_a & RX_CMD_A_RED)) {
2207                         netif_dbg(dev, rx_err, dev->net,
2208                                   "Error rx_cmd_a=0x%08x\n", rx_cmd_a);
2209                         dev->net->stats.rx_errors++;
2210                         dev->net->stats.rx_dropped++;
2211
2212                         if (rx_cmd_a & RX_CMD_A_FCS)
2213                                 dev->net->stats.rx_crc_errors++;
2214                         else if (rx_cmd_a & (RX_CMD_A_LONG | RX_CMD_A_RUNT))
2215                                 dev->net->stats.rx_frame_errors++;
2216                 } else {
2217                         /* MAX_SINGLE_PACKET_SIZE + 4(CRC) + 2(COE) + 4(Vlan) */
2218                         if (unlikely(size > (MAX_SINGLE_PACKET_SIZE + ETH_HLEN + 12))) {
2219                                 netif_dbg(dev, rx_err, dev->net,
2220                                           "size err rx_cmd_a=0x%08x\n",
2221                                           rx_cmd_a);
2222                                 return 0;
2223                         }
2224
2225                         /* last frame in this batch */
2226                         if (skb->len == size) {
2227                                 smsc75xx_rx_csum_offload(dev, skb, rx_cmd_a,
2228                                         rx_cmd_b);
2229
2230                                 skb_trim(skb, skb->len - 4); /* remove fcs */
2231                                 skb->truesize = size + sizeof(struct sk_buff);
2232
2233                                 return 1;
2234                         }
2235
2236                         ax_skb = skb_clone(skb, GFP_ATOMIC);
2237                         if (unlikely(!ax_skb)) {
2238                                 netdev_warn(dev->net, "Error allocating skb\n");
2239                                 return 0;
2240                         }
2241
2242                         ax_skb->len = size;
2243                         ax_skb->data = packet;
2244                         skb_set_tail_pointer(ax_skb, size);
2245
2246                         smsc75xx_rx_csum_offload(dev, ax_skb, rx_cmd_a,
2247                                 rx_cmd_b);
2248
2249                         skb_trim(ax_skb, ax_skb->len - 4); /* remove fcs */
2250                         ax_skb->truesize = size + sizeof(struct sk_buff);
2251
2252                         usbnet_skb_return(dev, ax_skb);
2253                 }
2254
2255                 skb_pull(skb, size);
2256
2257                 /* padding bytes before the next frame starts */
2258                 if (skb->len)
2259                         skb_pull(skb, align_count);
2260         }
2261
2262         return 1;
2263 }
2264
2265 static struct sk_buff *smsc75xx_tx_fixup(struct usbnet *dev,
2266                                          struct sk_buff *skb, gfp_t flags)
2267 {
2268         u32 tx_cmd_a, tx_cmd_b;
2269
2270         if (skb_cow_head(skb, SMSC75XX_TX_OVERHEAD)) {
2271                 dev_kfree_skb_any(skb);
2272                 return NULL;
2273         }
2274
2275         tx_cmd_a = (u32)(skb->len & TX_CMD_A_LEN) | TX_CMD_A_FCS;
2276
2277         if (skb->ip_summed == CHECKSUM_PARTIAL)
2278                 tx_cmd_a |= TX_CMD_A_IPE | TX_CMD_A_TPE;
2279
2280         if (skb_is_gso(skb)) {
2281                 u16 mss = max(skb_shinfo(skb)->gso_size, TX_MSS_MIN);
2282                 tx_cmd_b = (mss << TX_CMD_B_MSS_SHIFT) & TX_CMD_B_MSS;
2283
2284                 tx_cmd_a |= TX_CMD_A_LSO;
2285         } else {
2286                 tx_cmd_b = 0;
2287         }
2288
2289         skb_push(skb, 4);
2290         cpu_to_le32s(&tx_cmd_b);
2291         memcpy(skb->data, &tx_cmd_b, 4);
2292
2293         skb_push(skb, 4);
2294         cpu_to_le32s(&tx_cmd_a);
2295         memcpy(skb->data, &tx_cmd_a, 4);
2296
2297         return skb;
2298 }
2299
2300 static int smsc75xx_manage_power(struct usbnet *dev, int on)
2301 {
2302         dev->intf->needs_remote_wakeup = on;
2303         return 0;
2304 }
2305
2306 static const struct driver_info smsc75xx_info = {
2307         .description    = "smsc75xx USB 2.0 Gigabit Ethernet",
2308         .bind           = smsc75xx_bind,
2309         .unbind         = smsc75xx_unbind,
2310         .link_reset     = smsc75xx_link_reset,
2311         .reset          = smsc75xx_reset,
2312         .rx_fixup       = smsc75xx_rx_fixup,
2313         .tx_fixup       = smsc75xx_tx_fixup,
2314         .status         = smsc75xx_status,
2315         .manage_power   = smsc75xx_manage_power,
2316         .flags          = FLAG_ETHER | FLAG_SEND_ZLP | FLAG_LINK_INTR,
2317 };
2318
2319 static const struct usb_device_id products[] = {
2320         {
2321                 /* SMSC7500 USB Gigabit Ethernet Device */
2322                 USB_DEVICE(USB_VENDOR_ID_SMSC, USB_PRODUCT_ID_LAN7500),
2323                 .driver_info = (unsigned long) &smsc75xx_info,
2324         },
2325         {
2326                 /* SMSC7500 USB Gigabit Ethernet Device */
2327                 USB_DEVICE(USB_VENDOR_ID_SMSC, USB_PRODUCT_ID_LAN7505),
2328                 .driver_info = (unsigned long) &smsc75xx_info,
2329         },
2330         { },            /* END */
2331 };
2332 MODULE_DEVICE_TABLE(usb, products);
2333
2334 static struct usb_driver smsc75xx_driver = {
2335         .name           = SMSC_CHIPNAME,
2336         .id_table       = products,
2337         .probe          = usbnet_probe,
2338         .suspend        = smsc75xx_suspend,
2339         .resume         = smsc75xx_resume,
2340         .reset_resume   = smsc75xx_resume,
2341         .disconnect     = usbnet_disconnect,
2342         .disable_hub_initiated_lpm = 1,
2343         .supports_autosuspend = 1,
2344 };
2345
2346 module_usb_driver(smsc75xx_driver);
2347
2348 MODULE_AUTHOR("Nancy Lin");
2349 MODULE_AUTHOR("Steve Glendinning <steve.glendinning@shawell.net>");
2350 MODULE_DESCRIPTION("SMSC75XX USB 2.0 Gigabit Ethernet Devices");
2351 MODULE_LICENSE("GPL");