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 "smsc75xx.h"
  33
  34 #define SMSC_CHIPNAME                   "smsc75xx"
  35 #define SMSC_DRIVER_VERSION             "1.0.0"
  36 #define HS_USB_PKT_SIZE                 (512)
  37 #define FS_USB_PKT_SIZE                 (64)
  38 #define DEFAULT_HS_BURST_CAP_SIZE       (16 * 1024 + 5 * HS_USB_PKT_SIZE)
  39 #define DEFAULT_FS_BURST_CAP_SIZE       (6 * 1024 + 33 * FS_USB_PKT_SIZE)
  40 #define DEFAULT_BULK_IN_DELAY           (0x00002000)
  41 #define MAX_SINGLE_PACKET_SIZE          (9000)
  42 #define LAN75XX_EEPROM_MAGIC            (0x7500)
  43 #define EEPROM_MAC_OFFSET               (0x01)
  44 #define DEFAULT_TX_CSUM_ENABLE          (true)
  45 #define DEFAULT_RX_CSUM_ENABLE          (true)
  46 #define SMSC75XX_INTERNAL_PHY_ID        (1)
  47 #define SMSC75XX_TX_OVERHEAD            (8)
  48 #define MAX_RX_FIFO_SIZE                (20 * 1024)
  49 #define MAX_TX_FIFO_SIZE                (12 * 1024)
  50 #define USB_VENDOR_ID_SMSC              (0x0424)
  51 #define USB_PRODUCT_ID_LAN7500          (0x7500)
  52 #define USB_PRODUCT_ID_LAN7505          (0x7505)
  53 #define RXW_PADDING                     2
  54 #define SUPPORTED_WAKE                  (WAKE_PHY | WAKE_UCAST | WAKE_BCAST | \
  55                                          WAKE_MCAST | WAKE_ARP | WAKE_MAGIC)
  56
  57 #define SUSPEND_SUSPEND0                (0x01)
  58 #define SUSPEND_SUSPEND1                (0x02)
  59 #define SUSPEND_SUSPEND2                (0x04)
  60 #define SUSPEND_SUSPEND3                (0x08)
  61 #define SUSPEND_ALLMODES                (SUSPEND_SUSPEND0 | SUSPEND_SUSPEND1 | \
  62                                          SUSPEND_SUSPEND2 | SUSPEND_SUSPEND3)
  63
  64 struct smsc75xx_priv {
  65         struct usbnet *dev;
  66         u32 rfe_ctl;
  67         u32 wolopts;
  68         u32 multicast_hash_table[DP_SEL_VHF_HASH_LEN];
  69         struct mutex dataport_mutex;
  70         spinlock_t rfe_ctl_lock;
  71         struct work_struct set_multicast;
  72         u8 suspend_flags;
  73 };
  74
  75 struct usb_context {
  76         struct usb_ctrlrequest req;
  77         struct usbnet *dev;
  78 };
  79
  80 static bool turbo_mode = true;
  81 module_param(turbo_mode, bool, 0644);
  82 MODULE_PARM_DESC(turbo_mode, "Enable multiple frames per Rx transaction");
  83
  84 static int smsc75xx_link_ok_nopm(struct usbnet *dev);
  85 static int smsc75xx_phy_gig_workaround(struct usbnet *dev);
  86
  87 static int __must_check __smsc75xx_read_reg(struct usbnet *dev, u32 index,
  88                                             u32 *data, int in_pm)
  89 {
  90         u32 buf;
  91         int ret;
  92         int (*fn)(struct usbnet *, u8, u8, u16, u16, void *, u16);
  93
  94         BUG_ON(!dev);
  95
  96         if (!in_pm)
  97                 fn = usbnet_read_cmd;
  98         else
  99                 fn = usbnet_read_cmd_nopm;
 100
 101         ret = fn(dev, USB_VENDOR_REQUEST_READ_REGISTER, USB_DIR_IN
 102                  | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 103                  0, index, &buf, 4);
 104         if (unlikely(ret < 0))
 105                 netdev_warn(dev->net, "Failed to read reg index 0x%08x: %d\n",
 106                             index, ret);
 107
 108         le32_to_cpus(&buf);
 109         *data = buf;
 110
 111         return ret;
 112 }
 113
 114 static int __must_check __smsc75xx_write_reg(struct usbnet *dev, u32 index,
 115                                              u32 data, int in_pm)
 116 {
 117         u32 buf;
 118         int ret;
 119         int (*fn)(struct usbnet *, u8, u8, u16, u16, const void *, u16);
 120
 121         BUG_ON(!dev);
 122
 123         if (!in_pm)
 124                 fn = usbnet_write_cmd;
 125         else
 126                 fn = usbnet_write_cmd_nopm;
 127
 128         buf = data;
 129         cpu_to_le32s(&buf);
 130
 131         ret = fn(dev, USB_VENDOR_REQUEST_WRITE_REGISTER, USB_DIR_OUT
 132                  | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 133                  0, index, &buf, 4);
 134         if (unlikely(ret < 0))
 135                 netdev_warn(dev->net, "Failed to write reg index 0x%08x: %d\n",
 136                             index, ret);
 137
 138         return ret;
 139 }
 140
 141 static int __must_check smsc75xx_read_reg_nopm(struct usbnet *dev, u32 index,
 142                                                u32 *data)
 143 {
 144         return __smsc75xx_read_reg(dev, index, data, 1);
 145 }
 146
 147 static int __must_check smsc75xx_write_reg_nopm(struct usbnet *dev, u32 index,
 148                                                 u32 data)
 149 {
 150         return __smsc75xx_write_reg(dev, index, data, 1);
 151 }
 152
 153 static int __must_check smsc75xx_read_reg(struct usbnet *dev, u32 index,
 154                                           u32 *data)
 155 {
 156         return __smsc75xx_read_reg(dev, index, data, 0);
 157 }
 158
 159 static int __must_check smsc75xx_write_reg(struct usbnet *dev, u32 index,
 160                                            u32 data)
 161 {
 162         return __smsc75xx_write_reg(dev, index, data, 0);
 163 }
 164
 165 /* Loop until the read is completed with timeout
 166  * called with phy_mutex held */
 167 static __must_check int __smsc75xx_phy_wait_not_busy(struct usbnet *dev,
 168                                                      int in_pm)
 169 {
 170         unsigned long start_time = jiffies;
 171         u32 val;
 172         int ret;
 173
 174         do {
 175                 ret = __smsc75xx_read_reg(dev, MII_ACCESS, &val, in_pm);
 176                 if (ret < 0) {
 177                         netdev_warn(dev->net, "Error reading MII_ACCESS\n");
 178                         return ret;
 179                 }
 180
 181                 if (!(val & MII_ACCESS_BUSY))
 182                         return 0;
 183         } while (!time_after(jiffies, start_time + HZ));
 184
 185         return -EIO;
 186 }
 187
 188 static int __smsc75xx_mdio_read(struct net_device *netdev, int phy_id, int idx,
 189                                 int in_pm)
 190 {
 191         struct usbnet *dev = netdev_priv(netdev);
 192         u32 val, addr;
 193         int ret;
 194
 195         mutex_lock(&dev->phy_mutex);
 196
 197         /* confirm MII not busy */
 198         ret = __smsc75xx_phy_wait_not_busy(dev, in_pm);
 199         if (ret < 0) {
 200                 netdev_warn(dev->net, "MII is busy in smsc75xx_mdio_read\n");
 201                 goto done;
 202         }
 203
 204         /* set the address, index & direction (read from PHY) */
 205         phy_id &= dev->mii.phy_id_mask;
 206         idx &= dev->mii.reg_num_mask;
 207         addr = ((phy_id << MII_ACCESS_PHY_ADDR_SHIFT) & MII_ACCESS_PHY_ADDR)
 208                 | ((idx << MII_ACCESS_REG_ADDR_SHIFT) & MII_ACCESS_REG_ADDR)
 209                 | MII_ACCESS_READ | MII_ACCESS_BUSY;
 210         ret = __smsc75xx_write_reg(dev, MII_ACCESS, addr, in_pm);
 211         if (ret < 0) {
 212                 netdev_warn(dev->net, "Error writing MII_ACCESS\n");
 213                 goto done;
 214         }
 215
 216         ret = __smsc75xx_phy_wait_not_busy(dev, in_pm);
 217         if (ret < 0) {
 218                 netdev_warn(dev->net, "Timed out reading MII reg %02X\n", idx);
 219                 goto done;
 220         }
 221
 222         ret = __smsc75xx_read_reg(dev, MII_DATA, &val, in_pm);
 223         if (ret < 0) {
 224                 netdev_warn(dev->net, "Error reading MII_DATA\n");
 225                 goto done;
 226         }
 227
 228         ret = (u16)(val & 0xFFFF);
 229
 230 done:
 231         mutex_unlock(&dev->phy_mutex);
 232         return ret;
 233 }
 234
 235 static void __smsc75xx_mdio_write(struct net_device *netdev, int phy_id,
 236                                   int idx, int regval, int in_pm)
 237 {
 238         struct usbnet *dev = netdev_priv(netdev);
 239         u32 val, addr;
 240         int ret;
 241
 242         mutex_lock(&dev->phy_mutex);
 243
 244         /* confirm MII not busy */
 245         ret = __smsc75xx_phy_wait_not_busy(dev, in_pm);
 246         if (ret < 0) {
 247                 netdev_warn(dev->net, "MII is busy in smsc75xx_mdio_write\n");
 248                 goto done;
 249         }
 250
 251         val = regval;
 252         ret = __smsc75xx_write_reg(dev, MII_DATA, val, in_pm);
 253         if (ret < 0) {
 254                 netdev_warn(dev->net, "Error writing MII_DATA\n");
 255                 goto done;
 256         }
 257
 258         /* set the address, index & direction (write to PHY) */
 259         phy_id &= dev->mii.phy_id_mask;
 260         idx &= dev->mii.reg_num_mask;
 261         addr = ((phy_id << MII_ACCESS_PHY_ADDR_SHIFT) & MII_ACCESS_PHY_ADDR)
 262                 | ((idx << MII_ACCESS_REG_ADDR_SHIFT) & MII_ACCESS_REG_ADDR)
 263                 | MII_ACCESS_WRITE | MII_ACCESS_BUSY;
 264         ret = __smsc75xx_write_reg(dev, MII_ACCESS, addr, in_pm);
 265         if (ret < 0) {
 266                 netdev_warn(dev->net, "Error writing MII_ACCESS\n");
 267                 goto done;
 268         }
 269
 270         ret = __smsc75xx_phy_wait_not_busy(dev, in_pm);
 271         if (ret < 0) {
 272                 netdev_warn(dev->net, "Timed out writing MII reg %02X\n", idx);
 273                 goto done;
 274         }
 275
 276 done:
 277         mutex_unlock(&dev->phy_mutex);
 278 }
 279
 280 static int smsc75xx_mdio_read_nopm(struct net_device *netdev, int phy_id,
 281                                    int idx)
 282 {
 283         return __smsc75xx_mdio_read(netdev, phy_id, idx, 1);
 284 }
 285
 286 static void smsc75xx_mdio_write_nopm(struct net_device *netdev, int phy_id,
 287                                      int idx, int regval)
 288 {
 289         __smsc75xx_mdio_write(netdev, phy_id, idx, regval, 1);
 290 }
 291
 292 static int smsc75xx_mdio_read(struct net_device *netdev, int phy_id, int idx)
 293 {
 294         return __smsc75xx_mdio_read(netdev, phy_id, idx, 0);
 295 }
 296
 297 static void smsc75xx_mdio_write(struct net_device *netdev, int phy_id, int idx,
 298                                 int regval)
 299 {
 300         __smsc75xx_mdio_write(netdev, phy_id, idx, regval, 0);
 301 }
 302
 303 static int smsc75xx_wait_eeprom(struct usbnet *dev)
 304 {
 305         unsigned long start_time = jiffies;
 306         u32 val;
 307         int ret;
 308
 309         do {
 310                 ret = smsc75xx_read_reg(dev, E2P_CMD, &val);
 311                 if (ret < 0) {
 312                         netdev_warn(dev->net, "Error reading E2P_CMD\n");
 313                         return ret;
 314                 }
 315
 316                 if (!(val & E2P_CMD_BUSY) || (val & E2P_CMD_TIMEOUT))
 317                         break;
 318                 udelay(40);
 319         } while (!time_after(jiffies, start_time + HZ));
 320
 321         if (val & (E2P_CMD_TIMEOUT | E2P_CMD_BUSY)) {
 322                 netdev_warn(dev->net, "EEPROM read operation timeout\n");
 323                 return -EIO;
 324         }
 325
 326         return 0;
 327 }
 328
 329 static int smsc75xx_eeprom_confirm_not_busy(struct usbnet *dev)
 330 {
 331         unsigned long start_time = jiffies;
 332         u32 val;
 333         int ret;
 334
 335         do {
 336                 ret = smsc75xx_read_reg(dev, E2P_CMD, &val);
 337                 if (ret < 0) {
 338                         netdev_warn(dev->net, "Error reading E2P_CMD\n");
 339                         return ret;
 340                 }
 341
 342                 if (!(val & E2P_CMD_BUSY))
 343                         return 0;
 344
 345                 udelay(40);
 346         } while (!time_after(jiffies, start_time + HZ));
 347
 348         netdev_warn(dev->net, "EEPROM is busy\n");
 349         return -EIO;
 350 }
 351
 352 static int smsc75xx_read_eeprom(struct usbnet *dev, u32 offset, u32 length,
 353                                 u8 *data)
 354 {
 355         u32 val;
 356         int i, ret;
 357
 358         BUG_ON(!dev);
 359         BUG_ON(!data);
 360
 361         ret = smsc75xx_eeprom_confirm_not_busy(dev);
 362         if (ret)
 363                 return ret;
 364
 365         for (i = 0; i < length; i++) {
 366                 val = E2P_CMD_BUSY | E2P_CMD_READ | (offset & E2P_CMD_ADDR);
 367                 ret = smsc75xx_write_reg(dev, E2P_CMD, val);
 368                 if (ret < 0) {
 369                         netdev_warn(dev->net, "Error writing E2P_CMD\n");
 370                         return ret;
 371                 }
 372
 373                 ret = smsc75xx_wait_eeprom(dev);
 374                 if (ret < 0)
 375                         return ret;
 376
 377                 ret = smsc75xx_read_reg(dev, E2P_DATA, &val);
 378                 if (ret < 0) {
 379                         netdev_warn(dev->net, "Error reading E2P_DATA\n");
 380                         return ret;
 381                 }
 382
 383                 data[i] = val & 0xFF;
 384                 offset++;
 385         }
 386
 387         return 0;
 388 }
 389
 390 static int smsc75xx_write_eeprom(struct usbnet *dev, u32 offset, u32 length,
 391                                  u8 *data)
 392 {
 393         u32 val;
 394         int i, ret;
 395
 396         BUG_ON(!dev);
 397         BUG_ON(!data);
 398
 399         ret = smsc75xx_eeprom_confirm_not_busy(dev);
 400         if (ret)
 401                 return ret;
 402
 403         /* Issue write/erase enable command */
 404         val = E2P_CMD_BUSY | E2P_CMD_EWEN;
 405         ret = smsc75xx_write_reg(dev, E2P_CMD, val);
 406         if (ret < 0) {
 407                 netdev_warn(dev->net, "Error writing E2P_CMD\n");
 408                 return ret;
 409         }
 410
 411         ret = smsc75xx_wait_eeprom(dev);
 412         if (ret < 0)
 413                 return ret;
 414
 415         for (i = 0; i < length; i++) {
 416
 417                 /* Fill data register */
 418                 val = data[i];
 419                 ret = smsc75xx_write_reg(dev, E2P_DATA, val);
 420                 if (ret < 0) {
 421                         netdev_warn(dev->net, "Error writing E2P_DATA\n");
 422                         return ret;
 423                 }
 424
 425                 /* Send "write" command */
 426                 val = E2P_CMD_BUSY | E2P_CMD_WRITE | (offset & E2P_CMD_ADDR);
 427                 ret = smsc75xx_write_reg(dev, E2P_CMD, val);
 428                 if (ret < 0) {
 429                         netdev_warn(dev->net, "Error writing E2P_CMD\n");
 430                         return ret;
 431                 }
 432
 433                 ret = smsc75xx_wait_eeprom(dev);
 434                 if (ret < 0)
 435                         return ret;
 436
 437                 offset++;
 438         }
 439
 440         return 0;
 441 }
 442
 443 static int smsc75xx_dataport_wait_not_busy(struct usbnet *dev)
 444 {
 445         int i, ret;
 446
 447         for (i = 0; i < 100; i++) {
 448                 u32 dp_sel;
 449                 ret = smsc75xx_read_reg(dev, DP_SEL, &dp_sel);
 450                 if (ret < 0) {
 451                         netdev_warn(dev->net, "Error reading DP_SEL\n");
 452                         return ret;
 453                 }
 454
 455                 if (dp_sel & DP_SEL_DPRDY)
 456                         return 0;
 457
 458                 udelay(40);
 459         }
 460
 461         netdev_warn(dev->net, "smsc75xx_dataport_wait_not_busy timed out\n");
 462
 463         return -EIO;
 464 }
 465
 466 static int smsc75xx_dataport_write(struct usbnet *dev, u32 ram_select, u32 addr,
 467                                    u32 length, u32 *buf)
 468 {
 469         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 470         u32 dp_sel;
 471         int i, ret;
 472
 473         mutex_lock(&pdata->dataport_mutex);
 474
 475         ret = smsc75xx_dataport_wait_not_busy(dev);
 476         if (ret < 0) {
 477                 netdev_warn(dev->net, "smsc75xx_dataport_write busy on entry\n");
 478                 goto done;
 479         }
 480
 481         ret = smsc75xx_read_reg(dev, DP_SEL, &dp_sel);
 482         if (ret < 0) {
 483                 netdev_warn(dev->net, "Error reading DP_SEL\n");
 484                 goto done;
 485         }
 486
 487         dp_sel &= ~DP_SEL_RSEL;
 488         dp_sel |= ram_select;
 489         ret = smsc75xx_write_reg(dev, DP_SEL, dp_sel);
 490         if (ret < 0) {
 491                 netdev_warn(dev->net, "Error writing DP_SEL\n");
 492                 goto done;
 493         }
 494
 495         for (i = 0; i < length; i++) {
 496                 ret = smsc75xx_write_reg(dev, DP_ADDR, addr + i);
 497                 if (ret < 0) {
 498                         netdev_warn(dev->net, "Error writing DP_ADDR\n");
 499                         goto done;
 500                 }
 501
 502                 ret = smsc75xx_write_reg(dev, DP_DATA, buf[i]);
 503                 if (ret < 0) {
 504                         netdev_warn(dev->net, "Error writing DP_DATA\n");
 505                         goto done;
 506                 }
 507
 508                 ret = smsc75xx_write_reg(dev, DP_CMD, DP_CMD_WRITE);
 509                 if (ret < 0) {
 510                         netdev_warn(dev->net, "Error writing DP_CMD\n");
 511                         goto done;
 512                 }
 513
 514                 ret = smsc75xx_dataport_wait_not_busy(dev);
 515                 if (ret < 0) {
 516                         netdev_warn(dev->net, "smsc75xx_dataport_write timeout\n");
 517                         goto done;
 518                 }
 519         }
 520
 521 done:
 522         mutex_unlock(&pdata->dataport_mutex);
 523         return ret;
 524 }
 525
 526 /* returns hash bit number for given MAC address */
 527 static u32 smsc75xx_hash(char addr[ETH_ALEN])
 528 {
 529         return (ether_crc(ETH_ALEN, addr) >> 23) & 0x1ff;
 530 }
 531
 532 static void smsc75xx_deferred_multicast_write(struct work_struct *param)
 533 {
 534         struct smsc75xx_priv *pdata =
 535                 container_of(param, struct smsc75xx_priv, set_multicast);
 536         struct usbnet *dev = pdata->dev;
 537         int ret;
 538
 539         netif_dbg(dev, drv, dev->net, "deferred multicast write 0x%08x\n",
 540                   pdata->rfe_ctl);
 541
 542         smsc75xx_dataport_write(dev, DP_SEL_VHF, DP_SEL_VHF_VLAN_LEN,
 543                 DP_SEL_VHF_HASH_LEN, pdata->multicast_hash_table);
 544
 545         ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
 546         if (ret < 0)
 547                 netdev_warn(dev->net, "Error writing RFE_CRL\n");
 548 }
 549
 550 static void smsc75xx_set_multicast(struct net_device *netdev)
 551 {
 552         struct usbnet *dev = netdev_priv(netdev);
 553         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 554         unsigned long flags;
 555         int i;
 556
 557         spin_lock_irqsave(&pdata->rfe_ctl_lock, flags);
 558
 559         pdata->rfe_ctl &=
 560                 ~(RFE_CTL_AU | RFE_CTL_AM | RFE_CTL_DPF | RFE_CTL_MHF);
 561         pdata->rfe_ctl |= RFE_CTL_AB;
 562
 563         for (i = 0; i < DP_SEL_VHF_HASH_LEN; i++)
 564                 pdata->multicast_hash_table[i] = 0;
 565
 566         if (dev->net->flags & IFF_PROMISC) {
 567                 netif_dbg(dev, drv, dev->net, "promiscuous mode enabled\n");
 568                 pdata->rfe_ctl |= RFE_CTL_AM | RFE_CTL_AU;
 569         } else if (dev->net->flags & IFF_ALLMULTI) {
 570                 netif_dbg(dev, drv, dev->net, "receive all multicast enabled\n");
 571                 pdata->rfe_ctl |= RFE_CTL_AM | RFE_CTL_DPF;
 572         } else if (!netdev_mc_empty(dev->net)) {
 573                 struct netdev_hw_addr *ha;
 574
 575                 netif_dbg(dev, drv, dev->net, "receive multicast hash filter\n");
 576
 577                 pdata->rfe_ctl |= RFE_CTL_MHF | RFE_CTL_DPF;
 578
 579                 netdev_for_each_mc_addr(ha, netdev) {
 580                         u32 bitnum = smsc75xx_hash(ha->addr);
 581                         pdata->multicast_hash_table[bitnum / 32] |=
 582                                 (1 << (bitnum % 32));
 583                 }
 584         } else {
 585                 netif_dbg(dev, drv, dev->net, "receive own packets only\n");
 586                 pdata->rfe_ctl |= RFE_CTL_DPF;
 587         }
 588
 589         spin_unlock_irqrestore(&pdata->rfe_ctl_lock, flags);
 590
 591         /* defer register writes to a sleepable context */
 592         schedule_work(&pdata->set_multicast);
 593 }
 594
 595 static int smsc75xx_update_flowcontrol(struct usbnet *dev, u8 duplex,
 596                                             u16 lcladv, u16 rmtadv)
 597 {
 598         u32 flow = 0, fct_flow = 0;
 599         int ret;
 600
 601         if (duplex == DUPLEX_FULL) {
 602                 u8 cap = mii_resolve_flowctrl_fdx(lcladv, rmtadv);
 603
 604                 if (cap & FLOW_CTRL_TX) {
 605                         flow = (FLOW_TX_FCEN | 0xFFFF);
 606                         /* set fct_flow thresholds to 20% and 80% */
 607                         fct_flow = (8 << 8) | 32;
 608                 }
 609
 610                 if (cap & FLOW_CTRL_RX)
 611                         flow |= FLOW_RX_FCEN;
 612
 613                 netif_dbg(dev, link, dev->net, "rx pause %s, tx pause %s\n",
 614                           (cap & FLOW_CTRL_RX ? "enabled" : "disabled"),
 615                           (cap & FLOW_CTRL_TX ? "enabled" : "disabled"));
 616         } else {
 617                 netif_dbg(dev, link, dev->net, "half duplex\n");
 618         }
 619
 620         ret = smsc75xx_write_reg(dev, FLOW, flow);
 621         if (ret < 0) {
 622                 netdev_warn(dev->net, "Error writing FLOW\n");
 623                 return ret;
 624         }
 625
 626         ret = smsc75xx_write_reg(dev, FCT_FLOW, fct_flow);
 627         if (ret < 0) {
 628                 netdev_warn(dev->net, "Error writing FCT_FLOW\n");
 629                 return ret;
 630         }
 631
 632         return 0;
 633 }
 634
 635 static int smsc75xx_link_reset(struct usbnet *dev)
 636 {
 637         struct mii_if_info *mii = &dev->mii;
 638         struct ethtool_cmd ecmd = { .cmd = ETHTOOL_GSET };
 639         u16 lcladv, rmtadv;
 640         int ret;
 641
 642         /* write to clear phy interrupt status */
 643         smsc75xx_mdio_write(dev->net, mii->phy_id, PHY_INT_SRC,
 644                 PHY_INT_SRC_CLEAR_ALL);
 645
 646         ret = smsc75xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL);
 647         if (ret < 0) {
 648                 netdev_warn(dev->net, "Error writing INT_STS\n");
 649                 return ret;
 650         }
 651
 652         mii_check_media(mii, 1, 1);
 653         mii_ethtool_gset(&dev->mii, &ecmd);
 654         lcladv = smsc75xx_mdio_read(dev->net, mii->phy_id, MII_ADVERTISE);
 655         rmtadv = smsc75xx_mdio_read(dev->net, mii->phy_id, MII_LPA);
 656
 657         netif_dbg(dev, link, dev->net, "speed: %u duplex: %d lcladv: %04x rmtadv: %04x\n",
 658                   ethtool_cmd_speed(&ecmd), ecmd.duplex, lcladv, rmtadv);
 659
 660         return smsc75xx_update_flowcontrol(dev, ecmd.duplex, lcladv, rmtadv);
 661 }
 662
 663 static void smsc75xx_status(struct usbnet *dev, struct urb *urb)
 664 {
 665         u32 intdata;
 666
 667         if (urb->actual_length != 4) {
 668                 netdev_warn(dev->net, "unexpected urb length %d\n",
 669                             urb->actual_length);
 670                 return;
 671         }
 672
 673         memcpy(&intdata, urb->transfer_buffer, 4);
 674         le32_to_cpus(&intdata);
 675
 676         netif_dbg(dev, link, dev->net, "intdata: 0x%08X\n", intdata);
 677
 678         if (intdata & INT_ENP_PHY_INT)
 679                 usbnet_defer_kevent(dev, EVENT_LINK_RESET);
 680         else
 681                 netdev_warn(dev->net, "unexpected interrupt, intdata=0x%08X\n",
 682                             intdata);
 683 }
 684
 685 static int smsc75xx_ethtool_get_eeprom_len(struct net_device *net)
 686 {
 687         return MAX_EEPROM_SIZE;
 688 }
 689
 690 static int smsc75xx_ethtool_get_eeprom(struct net_device *netdev,
 691                                        struct ethtool_eeprom *ee, u8 *data)
 692 {
 693         struct usbnet *dev = netdev_priv(netdev);
 694
 695         ee->magic = LAN75XX_EEPROM_MAGIC;
 696
 697         return smsc75xx_read_eeprom(dev, ee->offset, ee->len, data);
 698 }
 699
 700 static int smsc75xx_ethtool_set_eeprom(struct net_device *netdev,
 701                                        struct ethtool_eeprom *ee, u8 *data)
 702 {
 703         struct usbnet *dev = netdev_priv(netdev);
 704
 705         if (ee->magic != LAN75XX_EEPROM_MAGIC) {
 706                 netdev_warn(dev->net, "EEPROM: magic value mismatch: 0x%x\n",
 707                             ee->magic);
 708                 return -EINVAL;
 709         }
 710
 711         return smsc75xx_write_eeprom(dev, ee->offset, ee->len, data);
 712 }
 713
 714 static void smsc75xx_ethtool_get_wol(struct net_device *net,
 715                                      struct ethtool_wolinfo *wolinfo)
 716 {
 717         struct usbnet *dev = netdev_priv(net);
 718         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 719
 720         wolinfo->supported = SUPPORTED_WAKE;
 721         wolinfo->wolopts = pdata->wolopts;
 722 }
 723
 724 static int smsc75xx_ethtool_set_wol(struct net_device *net,
 725                                     struct ethtool_wolinfo *wolinfo)
 726 {
 727         struct usbnet *dev = netdev_priv(net);
 728         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 729         int ret;
 730
 731         if (wolinfo->wolopts & ~SUPPORTED_WAKE)
 732                 return -EINVAL;
 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_settings   = usbnet_get_settings,
 750         .set_settings   = usbnet_set_settings,
 751         .get_eeprom_len = smsc75xx_ethtool_get_eeprom_len,
 752         .get_eeprom     = smsc75xx_ethtool_get_eeprom,
 753         .set_eeprom     = smsc75xx_ethtool_set_eeprom,
 754         .get_wol        = smsc75xx_ethtool_get_wol,
 755         .set_wol        = smsc75xx_ethtool_set_wol,
 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         /* try reading mac address from EEPROM */
 771         if (smsc75xx_read_eeprom(dev, EEPROM_MAC_OFFSET, ETH_ALEN,
 772                         dev->net->dev_addr) == 0) {
 773                 if (is_valid_ether_addr(dev->net->dev_addr)) {
 774                         /* eeprom values are valid so use them */
 775                         netif_dbg(dev, ifup, dev->net,
 776                                   "MAC address read from EEPROM\n");
 777                         return;
 778                 }
 779         }
 780
 781         /* no eeprom, or eeprom values are invalid. generate random MAC */
 782         eth_hw_addr_random(dev->net);
 783         netif_dbg(dev, ifup, dev->net, "MAC address set to eth_random_addr\n");
 784 }
 785
 786 static int smsc75xx_set_mac_address(struct usbnet *dev)
 787 {
 788         u32 addr_lo = dev->net->dev_addr[0] | dev->net->dev_addr[1] << 8 |
 789                 dev->net->dev_addr[2] << 16 | dev->net->dev_addr[3] << 24;
 790         u32 addr_hi = dev->net->dev_addr[4] | dev->net->dev_addr[5] << 8;
 791
 792         int ret = smsc75xx_write_reg(dev, RX_ADDRH, addr_hi);
 793         if (ret < 0) {
 794                 netdev_warn(dev->net, "Failed to write RX_ADDRH: %d\n", ret);
 795                 return ret;
 796         }
 797
 798         ret = smsc75xx_write_reg(dev, RX_ADDRL, addr_lo);
 799         if (ret < 0) {
 800                 netdev_warn(dev->net, "Failed to write RX_ADDRL: %d\n", ret);
 801                 return ret;
 802         }
 803
 804         addr_hi |= ADDR_FILTX_FB_VALID;
 805         ret = smsc75xx_write_reg(dev, ADDR_FILTX, addr_hi);
 806         if (ret < 0) {
 807                 netdev_warn(dev->net, "Failed to write ADDR_FILTX: %d\n", ret);
 808                 return ret;
 809         }
 810
 811         ret = smsc75xx_write_reg(dev, ADDR_FILTX + 4, addr_lo);
 812         if (ret < 0)
 813                 netdev_warn(dev->net, "Failed to write ADDR_FILTX+4: %d\n", ret);
 814
 815         return ret;
 816 }
 817
 818 static int smsc75xx_phy_initialize(struct usbnet *dev)
 819 {
 820         int bmcr, ret, timeout = 0;
 821
 822         /* Initialize MII structure */
 823         dev->mii.dev = dev->net;
 824         dev->mii.mdio_read = smsc75xx_mdio_read;
 825         dev->mii.mdio_write = smsc75xx_mdio_write;
 826         dev->mii.phy_id_mask = 0x1f;
 827         dev->mii.reg_num_mask = 0x1f;
 828         dev->mii.supports_gmii = 1;
 829         dev->mii.phy_id = SMSC75XX_INTERNAL_PHY_ID;
 830
 831         /* reset phy and wait for reset to complete */
 832         smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_BMCR, BMCR_RESET);
 833
 834         do {
 835                 msleep(10);
 836                 bmcr = smsc75xx_mdio_read(dev->net, dev->mii.phy_id, MII_BMCR);
 837                 if (bmcr < 0) {
 838                         netdev_warn(dev->net, "Error reading MII_BMCR\n");
 839                         return bmcr;
 840                 }
 841                 timeout++;
 842         } while ((bmcr & BMCR_RESET) && (timeout < 100));
 843
 844         if (timeout >= 100) {
 845                 netdev_warn(dev->net, "timeout on PHY Reset\n");
 846                 return -EIO;
 847         }
 848
 849         /* phy workaround for gig link */
 850         smsc75xx_phy_gig_workaround(dev);
 851
 852         smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_ADVERTISE,
 853                 ADVERTISE_ALL | ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP |
 854                 ADVERTISE_PAUSE_ASYM);
 855         smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_CTRL1000,
 856                 ADVERTISE_1000FULL);
 857
 858         /* read and write to clear phy interrupt status */
 859         ret = smsc75xx_mdio_read(dev->net, dev->mii.phy_id, PHY_INT_SRC);
 860         if (ret < 0) {
 861                 netdev_warn(dev->net, "Error reading PHY_INT_SRC\n");
 862                 return ret;
 863         }
 864
 865         smsc75xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_SRC, 0xffff);
 866
 867         smsc75xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_MASK,
 868                 PHY_INT_MASK_DEFAULT);
 869         mii_nway_restart(&dev->mii);
 870
 871         netif_dbg(dev, ifup, dev->net, "phy initialised successfully\n");
 872         return 0;
 873 }
 874
 875 static int smsc75xx_set_rx_max_frame_length(struct usbnet *dev, int size)
 876 {
 877         int ret = 0;
 878         u32 buf;
 879         bool rxenabled;
 880
 881         ret = smsc75xx_read_reg(dev, MAC_RX, &buf);
 882         if (ret < 0) {
 883                 netdev_warn(dev->net, "Failed to read MAC_RX: %d\n", ret);
 884                 return ret;
 885         }
 886
 887         rxenabled = ((buf & MAC_RX_RXEN) != 0);
 888
 889         if (rxenabled) {
 890                 buf &= ~MAC_RX_RXEN;
 891                 ret = smsc75xx_write_reg(dev, MAC_RX, buf);
 892                 if (ret < 0) {
 893                         netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
 894                         return ret;
 895                 }
 896         }
 897
 898         /* add 4 to size for FCS */
 899         buf &= ~MAC_RX_MAX_SIZE;
 900         buf |= (((size + 4) << MAC_RX_MAX_SIZE_SHIFT) & MAC_RX_MAX_SIZE);
 901
 902         ret = smsc75xx_write_reg(dev, MAC_RX, buf);
 903         if (ret < 0) {
 904                 netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
 905                 return ret;
 906         }
 907
 908         if (rxenabled) {
 909                 buf |= MAC_RX_RXEN;
 910                 ret = smsc75xx_write_reg(dev, MAC_RX, buf);
 911                 if (ret < 0) {
 912                         netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
 913                         return ret;
 914                 }
 915         }
 916
 917         return 0;
 918 }
 919
 920 static int smsc75xx_change_mtu(struct net_device *netdev, int new_mtu)
 921 {
 922         struct usbnet *dev = netdev_priv(netdev);
 923         int ret;
 924
 925         if (new_mtu > MAX_SINGLE_PACKET_SIZE)
 926                 return -EINVAL;
 927
 928         ret = smsc75xx_set_rx_max_frame_length(dev, new_mtu + ETH_HLEN);
 929         if (ret < 0) {
 930                 netdev_warn(dev->net, "Failed to set mac rx frame length\n");
 931                 return ret;
 932         }
 933
 934         return usbnet_change_mtu(netdev, new_mtu);
 935 }
 936
 937 /* Enable or disable Rx checksum offload engine */
 938 static int smsc75xx_set_features(struct net_device *netdev,
 939         netdev_features_t features)
 940 {
 941         struct usbnet *dev = netdev_priv(netdev);
 942         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 943         unsigned long flags;
 944         int ret;
 945
 946         spin_lock_irqsave(&pdata->rfe_ctl_lock, flags);
 947
 948         if (features & NETIF_F_RXCSUM)
 949                 pdata->rfe_ctl |= RFE_CTL_TCPUDP_CKM | RFE_CTL_IP_CKM;
 950         else
 951                 pdata->rfe_ctl &= ~(RFE_CTL_TCPUDP_CKM | RFE_CTL_IP_CKM);
 952
 953         spin_unlock_irqrestore(&pdata->rfe_ctl_lock, flags);
 954         /* it's racing here! */
 955
 956         ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
 957         if (ret < 0) {
 958                 netdev_warn(dev->net, "Error writing RFE_CTL\n");
 959                 return ret;
 960         }
 961         return 0;
 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_phy_gig_workaround(struct usbnet *dev)
 991 {
 992         struct mii_if_info *mii = &dev->mii;
 993         int ret = 0, timeout = 0;
 994         u32 buf, link_up = 0;
 995
 996         /* Set the phy in Gig loopback */
 997         smsc75xx_mdio_write(dev->net, mii->phy_id, MII_BMCR, 0x4040);
 998
 999         /* Wait for the link up */
1000         do {
1001                 link_up = smsc75xx_link_ok_nopm(dev);
1002                 usleep_range(10000, 20000);
1003                 timeout++;
1004         } while ((!link_up) && (timeout < 1000));
1005
1006         if (timeout >= 1000) {
1007                 netdev_warn(dev->net, "Timeout waiting for PHY link up\n");
1008                 return -EIO;
1009         }
1010
1011         /* phy reset */
1012         ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
1013         if (ret < 0) {
1014                 netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret);
1015                 return ret;
1016         }
1017
1018         buf |= PMT_CTL_PHY_RST;
1019
1020         ret = smsc75xx_write_reg(dev, PMT_CTL, buf);
1021         if (ret < 0) {
1022                 netdev_warn(dev->net, "Failed to write PMT_CTL: %d\n", ret);
1023                 return ret;
1024         }
1025
1026         timeout = 0;
1027         do {
1028                 usleep_range(10000, 20000);
1029                 ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
1030                 if (ret < 0) {
1031                         netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n",
1032                                     ret);
1033                         return ret;
1034                 }
1035                 timeout++;
1036         } while ((buf & PMT_CTL_PHY_RST) && (timeout < 100));
1037
1038         if (timeout >= 100) {
1039                 netdev_warn(dev->net, "timeout waiting for PHY Reset\n");
1040                 return -EIO;
1041         }
1042
1043         return 0;
1044 }
1045
1046 static int smsc75xx_reset(struct usbnet *dev)
1047 {
1048         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1049         u32 buf;
1050         int ret = 0, timeout;
1051
1052         netif_dbg(dev, ifup, dev->net, "entering smsc75xx_reset\n");
1053
1054         ret = smsc75xx_wait_ready(dev, 0);
1055         if (ret < 0) {
1056                 netdev_warn(dev->net, "device not ready in smsc75xx_reset\n");
1057                 return ret;
1058         }
1059
1060         ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1061         if (ret < 0) {
1062                 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1063                 return ret;
1064         }
1065
1066         buf |= HW_CFG_LRST;
1067
1068         ret = smsc75xx_write_reg(dev, HW_CFG, buf);
1069         if (ret < 0) {
1070                 netdev_warn(dev->net, "Failed to write HW_CFG: %d\n", ret);
1071                 return ret;
1072         }
1073
1074         timeout = 0;
1075         do {
1076                 msleep(10);
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                 timeout++;
1083         } while ((buf & HW_CFG_LRST) && (timeout < 100));
1084
1085         if (timeout >= 100) {
1086                 netdev_warn(dev->net, "timeout on completion of Lite Reset\n");
1087                 return -EIO;
1088         }
1089
1090         netif_dbg(dev, ifup, dev->net, "Lite reset complete, resetting PHY\n");
1091
1092         ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
1093         if (ret < 0) {
1094                 netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret);
1095                 return ret;
1096         }
1097
1098         buf |= PMT_CTL_PHY_RST;
1099
1100         ret = smsc75xx_write_reg(dev, PMT_CTL, buf);
1101         if (ret < 0) {
1102                 netdev_warn(dev->net, "Failed to write PMT_CTL: %d\n", ret);
1103                 return ret;
1104         }
1105
1106         timeout = 0;
1107         do {
1108                 msleep(10);
1109                 ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
1110                 if (ret < 0) {
1111                         netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret);
1112                         return ret;
1113                 }
1114                 timeout++;
1115         } while ((buf & PMT_CTL_PHY_RST) && (timeout < 100));
1116
1117         if (timeout >= 100) {
1118                 netdev_warn(dev->net, "timeout waiting for PHY Reset\n");
1119                 return -EIO;
1120         }
1121
1122         netif_dbg(dev, ifup, dev->net, "PHY reset complete\n");
1123
1124         ret = smsc75xx_set_mac_address(dev);
1125         if (ret < 0) {
1126                 netdev_warn(dev->net, "Failed to set mac address\n");
1127                 return ret;
1128         }
1129
1130         netif_dbg(dev, ifup, dev->net, "MAC Address: %pM\n",
1131                   dev->net->dev_addr);
1132
1133         ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1134         if (ret < 0) {
1135                 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1136                 return ret;
1137         }
1138
1139         netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG : 0x%08x\n",
1140                   buf);
1141
1142         buf |= HW_CFG_BIR;
1143
1144         ret = smsc75xx_write_reg(dev, HW_CFG, buf);
1145         if (ret < 0) {
1146                 netdev_warn(dev->net,  "Failed to write HW_CFG: %d\n", ret);
1147                 return ret;
1148         }
1149
1150         ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1151         if (ret < 0) {
1152                 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1153                 return ret;
1154         }
1155
1156         netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG after writing HW_CFG_BIR: 0x%08x\n",
1157                   buf);
1158
1159         if (!turbo_mode) {
1160                 buf = 0;
1161                 dev->rx_urb_size = MAX_SINGLE_PACKET_SIZE;
1162         } else if (dev->udev->speed == USB_SPEED_HIGH) {
1163                 buf = DEFAULT_HS_BURST_CAP_SIZE / HS_USB_PKT_SIZE;
1164                 dev->rx_urb_size = DEFAULT_HS_BURST_CAP_SIZE;
1165         } else {
1166                 buf = DEFAULT_FS_BURST_CAP_SIZE / FS_USB_PKT_SIZE;
1167                 dev->rx_urb_size = DEFAULT_FS_BURST_CAP_SIZE;
1168         }
1169
1170         netif_dbg(dev, ifup, dev->net, "rx_urb_size=%ld\n",
1171                   (ulong)dev->rx_urb_size);
1172
1173         ret = smsc75xx_write_reg(dev, BURST_CAP, buf);
1174         if (ret < 0) {
1175                 netdev_warn(dev->net, "Failed to write BURST_CAP: %d\n", ret);
1176                 return ret;
1177         }
1178
1179         ret = smsc75xx_read_reg(dev, BURST_CAP, &buf);
1180         if (ret < 0) {
1181                 netdev_warn(dev->net, "Failed to read BURST_CAP: %d\n", ret);
1182                 return ret;
1183         }
1184
1185         netif_dbg(dev, ifup, dev->net,
1186                   "Read Value from BURST_CAP after writing: 0x%08x\n", buf);
1187
1188         ret = smsc75xx_write_reg(dev, BULK_IN_DLY, DEFAULT_BULK_IN_DELAY);
1189         if (ret < 0) {
1190                 netdev_warn(dev->net, "Failed to write BULK_IN_DLY: %d\n", ret);
1191                 return ret;
1192         }
1193
1194         ret = smsc75xx_read_reg(dev, BULK_IN_DLY, &buf);
1195         if (ret < 0) {
1196                 netdev_warn(dev->net, "Failed to read BULK_IN_DLY: %d\n", ret);
1197                 return ret;
1198         }
1199
1200         netif_dbg(dev, ifup, dev->net,
1201                   "Read Value from BULK_IN_DLY after writing: 0x%08x\n", buf);
1202
1203         if (turbo_mode) {
1204                 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1205                 if (ret < 0) {
1206                         netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1207                         return ret;
1208                 }
1209
1210                 netif_dbg(dev, ifup, dev->net, "HW_CFG: 0x%08x\n", buf);
1211
1212                 buf |= (HW_CFG_MEF | HW_CFG_BCE);
1213
1214                 ret = smsc75xx_write_reg(dev, HW_CFG, buf);
1215                 if (ret < 0) {
1216                         netdev_warn(dev->net, "Failed to write HW_CFG: %d\n", ret);
1217                         return ret;
1218                 }
1219
1220                 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1221                 if (ret < 0) {
1222                         netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1223                         return ret;
1224                 }
1225
1226                 netif_dbg(dev, ifup, dev->net, "HW_CFG: 0x%08x\n", buf);
1227         }
1228
1229         /* set FIFO sizes */
1230         buf = (MAX_RX_FIFO_SIZE - 512) / 512;
1231         ret = smsc75xx_write_reg(dev, FCT_RX_FIFO_END, buf);
1232         if (ret < 0) {
1233                 netdev_warn(dev->net, "Failed to write FCT_RX_FIFO_END: %d\n", ret);
1234                 return ret;
1235         }
1236
1237         netif_dbg(dev, ifup, dev->net, "FCT_RX_FIFO_END set to 0x%08x\n", buf);
1238
1239         buf = (MAX_TX_FIFO_SIZE - 512) / 512;
1240         ret = smsc75xx_write_reg(dev, FCT_TX_FIFO_END, buf);
1241         if (ret < 0) {
1242                 netdev_warn(dev->net, "Failed to write FCT_TX_FIFO_END: %d\n", ret);
1243                 return ret;
1244         }
1245
1246         netif_dbg(dev, ifup, dev->net, "FCT_TX_FIFO_END set to 0x%08x\n", buf);
1247
1248         ret = smsc75xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL);
1249         if (ret < 0) {
1250                 netdev_warn(dev->net, "Failed to write INT_STS: %d\n", ret);
1251                 return ret;
1252         }
1253
1254         ret = smsc75xx_read_reg(dev, ID_REV, &buf);
1255         if (ret < 0) {
1256                 netdev_warn(dev->net, "Failed to read ID_REV: %d\n", ret);
1257                 return ret;
1258         }
1259
1260         netif_dbg(dev, ifup, dev->net, "ID_REV = 0x%08x\n", buf);
1261
1262         ret = smsc75xx_read_reg(dev, E2P_CMD, &buf);
1263         if (ret < 0) {
1264                 netdev_warn(dev->net, "Failed to read E2P_CMD: %d\n", ret);
1265                 return ret;
1266         }
1267
1268         /* only set default GPIO/LED settings if no EEPROM is detected */
1269         if (!(buf & E2P_CMD_LOADED)) {
1270                 ret = smsc75xx_read_reg(dev, LED_GPIO_CFG, &buf);
1271                 if (ret < 0) {
1272                         netdev_warn(dev->net, "Failed to read LED_GPIO_CFG: %d\n", ret);
1273                         return ret;
1274                 }
1275
1276                 buf &= ~(LED_GPIO_CFG_LED2_FUN_SEL | LED_GPIO_CFG_LED10_FUN_SEL);
1277                 buf |= LED_GPIO_CFG_LEDGPIO_EN | LED_GPIO_CFG_LED2_FUN_SEL;
1278
1279                 ret = smsc75xx_write_reg(dev, LED_GPIO_CFG, buf);
1280                 if (ret < 0) {
1281                         netdev_warn(dev->net, "Failed to write LED_GPIO_CFG: %d\n", ret);
1282                         return ret;
1283                 }
1284         }
1285
1286         ret = smsc75xx_write_reg(dev, FLOW, 0);
1287         if (ret < 0) {
1288                 netdev_warn(dev->net, "Failed to write FLOW: %d\n", ret);
1289                 return ret;
1290         }
1291
1292         ret = smsc75xx_write_reg(dev, FCT_FLOW, 0);
1293         if (ret < 0) {
1294                 netdev_warn(dev->net, "Failed to write FCT_FLOW: %d\n", ret);
1295                 return ret;
1296         }
1297
1298         /* Don't need rfe_ctl_lock during initialisation */
1299         ret = smsc75xx_read_reg(dev, RFE_CTL, &pdata->rfe_ctl);
1300         if (ret < 0) {
1301                 netdev_warn(dev->net, "Failed to read RFE_CTL: %d\n", ret);
1302                 return ret;
1303         }
1304
1305         pdata->rfe_ctl |= RFE_CTL_AB | RFE_CTL_DPF;
1306
1307         ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
1308         if (ret < 0) {
1309                 netdev_warn(dev->net, "Failed to write RFE_CTL: %d\n", ret);
1310                 return ret;
1311         }
1312
1313         ret = smsc75xx_read_reg(dev, RFE_CTL, &pdata->rfe_ctl);
1314         if (ret < 0) {
1315                 netdev_warn(dev->net, "Failed to read RFE_CTL: %d\n", ret);
1316                 return ret;
1317         }
1318
1319         netif_dbg(dev, ifup, dev->net, "RFE_CTL set to 0x%08x\n",
1320                   pdata->rfe_ctl);
1321
1322         /* Enable or disable checksum offload engines */
1323         smsc75xx_set_features(dev->net, dev->net->features);
1324
1325         smsc75xx_set_multicast(dev->net);
1326
1327         ret = smsc75xx_phy_initialize(dev);
1328         if (ret < 0) {
1329                 netdev_warn(dev->net, "Failed to initialize PHY: %d\n", ret);
1330                 return ret;
1331         }
1332
1333         ret = smsc75xx_read_reg(dev, INT_EP_CTL, &buf);
1334         if (ret < 0) {
1335                 netdev_warn(dev->net, "Failed to read INT_EP_CTL: %d\n", ret);
1336                 return ret;
1337         }
1338
1339         /* enable PHY interrupts */
1340         buf |= INT_ENP_PHY_INT;
1341
1342         ret = smsc75xx_write_reg(dev, INT_EP_CTL, buf);
1343         if (ret < 0) {
1344                 netdev_warn(dev->net, "Failed to write INT_EP_CTL: %d\n", ret);
1345                 return ret;
1346         }
1347
1348         /* allow mac to detect speed and duplex from phy */
1349         ret = smsc75xx_read_reg(dev, MAC_CR, &buf);
1350         if (ret < 0) {
1351                 netdev_warn(dev->net, "Failed to read MAC_CR: %d\n", ret);
1352                 return ret;
1353         }
1354
1355         buf |= (MAC_CR_ADD | MAC_CR_ASD);
1356         ret = smsc75xx_write_reg(dev, MAC_CR, buf);
1357         if (ret < 0) {
1358                 netdev_warn(dev->net, "Failed to write MAC_CR: %d\n", ret);
1359                 return ret;
1360         }
1361
1362         ret = smsc75xx_read_reg(dev, MAC_TX, &buf);
1363         if (ret < 0) {
1364                 netdev_warn(dev->net, "Failed to read MAC_TX: %d\n", ret);
1365                 return ret;
1366         }
1367
1368         buf |= MAC_TX_TXEN;
1369
1370         ret = smsc75xx_write_reg(dev, MAC_TX, buf);
1371         if (ret < 0) {
1372                 netdev_warn(dev->net, "Failed to write MAC_TX: %d\n", ret);
1373                 return ret;
1374         }
1375
1376         netif_dbg(dev, ifup, dev->net, "MAC_TX set to 0x%08x\n", buf);
1377
1378         ret = smsc75xx_read_reg(dev, FCT_TX_CTL, &buf);
1379         if (ret < 0) {
1380                 netdev_warn(dev->net, "Failed to read FCT_TX_CTL: %d\n", ret);
1381                 return ret;
1382         }
1383
1384         buf |= FCT_TX_CTL_EN;
1385
1386         ret = smsc75xx_write_reg(dev, FCT_TX_CTL, buf);
1387         if (ret < 0) {
1388                 netdev_warn(dev->net, "Failed to write FCT_TX_CTL: %d\n", ret);
1389                 return ret;
1390         }
1391
1392         netif_dbg(dev, ifup, dev->net, "FCT_TX_CTL set to 0x%08x\n", buf);
1393
1394         ret = smsc75xx_set_rx_max_frame_length(dev, dev->net->mtu + ETH_HLEN);
1395         if (ret < 0) {
1396                 netdev_warn(dev->net, "Failed to set max rx frame length\n");
1397                 return ret;
1398         }
1399
1400         ret = smsc75xx_read_reg(dev, MAC_RX, &buf);
1401         if (ret < 0) {
1402                 netdev_warn(dev->net, "Failed to read MAC_RX: %d\n", ret);
1403                 return ret;
1404         }
1405
1406         buf |= MAC_RX_RXEN;
1407
1408         ret = smsc75xx_write_reg(dev, MAC_RX, buf);
1409         if (ret < 0) {
1410                 netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
1411                 return ret;
1412         }
1413
1414         netif_dbg(dev, ifup, dev->net, "MAC_RX set to 0x%08x\n", buf);
1415
1416         ret = smsc75xx_read_reg(dev, FCT_RX_CTL, &buf);
1417         if (ret < 0) {
1418                 netdev_warn(dev->net, "Failed to read FCT_RX_CTL: %d\n", ret);
1419                 return ret;
1420         }
1421
1422         buf |= FCT_RX_CTL_EN;
1423
1424         ret = smsc75xx_write_reg(dev, FCT_RX_CTL, buf);
1425         if (ret < 0) {
1426                 netdev_warn(dev->net, "Failed to write FCT_RX_CTL: %d\n", ret);
1427                 return ret;
1428         }
1429
1430         netif_dbg(dev, ifup, dev->net, "FCT_RX_CTL set to 0x%08x\n", buf);
1431
1432         netif_dbg(dev, ifup, dev->net, "smsc75xx_reset, return 0\n");
1433         return 0;
1434 }
1435
1436 static const struct net_device_ops smsc75xx_netdev_ops = {
1437         .ndo_open               = usbnet_open,
1438         .ndo_stop               = usbnet_stop,
1439         .ndo_start_xmit         = usbnet_start_xmit,
1440         .ndo_tx_timeout         = usbnet_tx_timeout,
1441         .ndo_change_mtu         = smsc75xx_change_mtu,
1442         .ndo_set_mac_address    = eth_mac_addr,
1443         .ndo_validate_addr      = eth_validate_addr,
1444         .ndo_do_ioctl           = smsc75xx_ioctl,
1445         .ndo_set_rx_mode        = smsc75xx_set_multicast,
1446         .ndo_set_features       = smsc75xx_set_features,
1447 };
1448
1449 static int smsc75xx_bind(struct usbnet *dev, struct usb_interface *intf)
1450 {
1451         struct smsc75xx_priv *pdata = NULL;
1452         int ret;
1453
1454         printk(KERN_INFO SMSC_CHIPNAME " v" SMSC_DRIVER_VERSION "\n");
1455
1456         ret = usbnet_get_endpoints(dev, intf);
1457         if (ret < 0) {
1458                 netdev_warn(dev->net, "usbnet_get_endpoints failed: %d\n", ret);
1459                 return ret;
1460         }
1461
1462         dev->data[0] = (unsigned long)kzalloc(sizeof(struct smsc75xx_priv),
1463                                               GFP_KERNEL);
1464
1465         pdata = (struct smsc75xx_priv *)(dev->data[0]);
1466         if (!pdata)
1467                 return -ENOMEM;
1468
1469         pdata->dev = dev;
1470
1471         spin_lock_init(&pdata->rfe_ctl_lock);
1472         mutex_init(&pdata->dataport_mutex);
1473
1474         INIT_WORK(&pdata->set_multicast, smsc75xx_deferred_multicast_write);
1475
1476         if (DEFAULT_TX_CSUM_ENABLE)
1477                 dev->net->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
1478
1479         if (DEFAULT_RX_CSUM_ENABLE)
1480                 dev->net->features |= NETIF_F_RXCSUM;
1481
1482         dev->net->hw_features = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
1483                                 NETIF_F_RXCSUM;
1484
1485         ret = smsc75xx_wait_ready(dev, 0);
1486         if (ret < 0) {
1487                 netdev_warn(dev->net, "device not ready in smsc75xx_bind\n");
1488                 goto free_pdata;
1489         }
1490
1491         smsc75xx_init_mac_address(dev);
1492
1493         /* Init all registers */
1494         ret = smsc75xx_reset(dev);
1495         if (ret < 0) {
1496                 netdev_warn(dev->net, "smsc75xx_reset error %d\n", ret);
1497                 goto cancel_work;
1498         }
1499
1500         dev->net->netdev_ops = &smsc75xx_netdev_ops;
1501         dev->net->ethtool_ops = &smsc75xx_ethtool_ops;
1502         dev->net->flags |= IFF_MULTICAST;
1503         dev->net->hard_header_len += SMSC75XX_TX_OVERHEAD;
1504         dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len;
1505         return 0;
1506
1507 cancel_work:
1508         cancel_work_sync(&pdata->set_multicast);
1509 free_pdata:
1510         kfree(pdata);
1511         dev->data[0] = 0;
1512         return ret;
1513 }
1514
1515 static void smsc75xx_unbind(struct usbnet *dev, struct usb_interface *intf)
1516 {
1517         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1518         if (pdata) {
1519                 cancel_work_sync(&pdata->set_multicast);
1520                 netif_dbg(dev, ifdown, dev->net, "free pdata\n");
1521                 kfree(pdata);
1522                 dev->data[0] = 0;
1523         }
1524 }
1525
1526 static u16 smsc_crc(const u8 *buffer, size_t len)
1527 {
1528         return bitrev16(crc16(0xFFFF, buffer, len));
1529 }
1530
1531 static int smsc75xx_write_wuff(struct usbnet *dev, int filter, u32 wuf_cfg,
1532                                u32 wuf_mask1)
1533 {
1534         int cfg_base = WUF_CFGX + filter * 4;
1535         int mask_base = WUF_MASKX + filter * 16;
1536         int ret;
1537
1538         ret = smsc75xx_write_reg(dev, cfg_base, wuf_cfg);
1539         if (ret < 0) {
1540                 netdev_warn(dev->net, "Error writing WUF_CFGX\n");
1541                 return ret;
1542         }
1543
1544         ret = smsc75xx_write_reg(dev, mask_base, wuf_mask1);
1545         if (ret < 0) {
1546                 netdev_warn(dev->net, "Error writing WUF_MASKX\n");
1547                 return ret;
1548         }
1549
1550         ret = smsc75xx_write_reg(dev, mask_base + 4, 0);
1551         if (ret < 0) {
1552                 netdev_warn(dev->net, "Error writing WUF_MASKX\n");
1553                 return ret;
1554         }
1555
1556         ret = smsc75xx_write_reg(dev, mask_base + 8, 0);
1557         if (ret < 0) {
1558                 netdev_warn(dev->net, "Error writing WUF_MASKX\n");
1559                 return ret;
1560         }
1561
1562         ret = smsc75xx_write_reg(dev, mask_base + 12, 0);
1563         if (ret < 0) {
1564                 netdev_warn(dev->net, "Error writing WUF_MASKX\n");
1565                 return ret;
1566         }
1567
1568         return 0;
1569 }
1570
1571 static int smsc75xx_enter_suspend0(struct usbnet *dev)
1572 {
1573         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1574         u32 val;
1575         int ret;
1576
1577         ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1578         if (ret < 0) {
1579                 netdev_warn(dev->net, "Error reading PMT_CTL\n");
1580                 return ret;
1581         }
1582
1583         val &= (~(PMT_CTL_SUS_MODE | PMT_CTL_PHY_RST));
1584         val |= PMT_CTL_SUS_MODE_0 | PMT_CTL_WOL_EN | PMT_CTL_WUPS;
1585
1586         ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1587         if (ret < 0) {
1588                 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1589                 return ret;
1590         }
1591
1592         pdata->suspend_flags |= SUSPEND_SUSPEND0;
1593
1594         return 0;
1595 }
1596
1597 static int smsc75xx_enter_suspend1(struct usbnet *dev)
1598 {
1599         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1600         u32 val;
1601         int ret;
1602
1603         ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1604         if (ret < 0) {
1605                 netdev_warn(dev->net, "Error reading PMT_CTL\n");
1606                 return ret;
1607         }
1608
1609         val &= ~(PMT_CTL_SUS_MODE | PMT_CTL_WUPS | PMT_CTL_PHY_RST);
1610         val |= PMT_CTL_SUS_MODE_1;
1611
1612         ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1613         if (ret < 0) {
1614                 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1615                 return ret;
1616         }
1617
1618         /* clear wol status, enable energy detection */
1619         val &= ~PMT_CTL_WUPS;
1620         val |= (PMT_CTL_WUPS_ED | PMT_CTL_ED_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         pdata->suspend_flags |= SUSPEND_SUSPEND1;
1629
1630         return 0;
1631 }
1632
1633 static int smsc75xx_enter_suspend2(struct usbnet *dev)
1634 {
1635         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1636         u32 val;
1637         int ret;
1638
1639         ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1640         if (ret < 0) {
1641                 netdev_warn(dev->net, "Error reading PMT_CTL\n");
1642                 return ret;
1643         }
1644
1645         val &= ~(PMT_CTL_SUS_MODE | PMT_CTL_WUPS | PMT_CTL_PHY_RST);
1646         val |= PMT_CTL_SUS_MODE_2;
1647
1648         ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1649         if (ret < 0) {
1650                 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1651                 return ret;
1652         }
1653
1654         pdata->suspend_flags |= SUSPEND_SUSPEND2;
1655
1656         return 0;
1657 }
1658
1659 static int smsc75xx_enter_suspend3(struct usbnet *dev)
1660 {
1661         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1662         u32 val;
1663         int ret;
1664
1665         ret = smsc75xx_read_reg_nopm(dev, FCT_RX_CTL, &val);
1666         if (ret < 0) {
1667                 netdev_warn(dev->net, "Error reading FCT_RX_CTL\n");
1668                 return ret;
1669         }
1670
1671         if (val & FCT_RX_CTL_RXUSED) {
1672                 netdev_dbg(dev->net, "rx fifo not empty in autosuspend\n");
1673                 return -EBUSY;
1674         }
1675
1676         ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1677         if (ret < 0) {
1678                 netdev_warn(dev->net, "Error reading PMT_CTL\n");
1679                 return ret;
1680         }
1681
1682         val &= ~(PMT_CTL_SUS_MODE | PMT_CTL_WUPS | PMT_CTL_PHY_RST);
1683         val |= PMT_CTL_SUS_MODE_3 | PMT_CTL_RES_CLR_WKP_EN;
1684
1685         ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1686         if (ret < 0) {
1687                 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1688                 return ret;
1689         }
1690
1691         /* clear wol status */
1692         val &= ~PMT_CTL_WUPS;
1693         val |= PMT_CTL_WUPS_WOL;
1694
1695         ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1696         if (ret < 0) {
1697                 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1698                 return ret;
1699         }
1700
1701         pdata->suspend_flags |= SUSPEND_SUSPEND3;
1702
1703         return 0;
1704 }
1705
1706 static int smsc75xx_enable_phy_wakeup_interrupts(struct usbnet *dev, u16 mask)
1707 {
1708         struct mii_if_info *mii = &dev->mii;
1709         int ret;
1710
1711         netdev_dbg(dev->net, "enabling PHY wakeup interrupts\n");
1712
1713         /* read to clear */
1714         ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_SRC);
1715         if (ret < 0) {
1716                 netdev_warn(dev->net, "Error reading PHY_INT_SRC\n");
1717                 return ret;
1718         }
1719
1720         /* enable interrupt source */
1721         ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_MASK);
1722         if (ret < 0) {
1723                 netdev_warn(dev->net, "Error reading PHY_INT_MASK\n");
1724                 return ret;
1725         }
1726
1727         ret |= mask;
1728
1729         smsc75xx_mdio_write_nopm(dev->net, mii->phy_id, PHY_INT_MASK, ret);
1730
1731         return 0;
1732 }
1733
1734 static int smsc75xx_link_ok_nopm(struct usbnet *dev)
1735 {
1736         struct mii_if_info *mii = &dev->mii;
1737         int ret;
1738
1739         /* first, a dummy read, needed to latch some MII phys */
1740         ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR);
1741         if (ret < 0) {
1742                 netdev_warn(dev->net, "Error reading MII_BMSR\n");
1743                 return ret;
1744         }
1745
1746         ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR);
1747         if (ret < 0) {
1748                 netdev_warn(dev->net, "Error reading MII_BMSR\n");
1749                 return ret;
1750         }
1751
1752         return !!(ret & BMSR_LSTATUS);
1753 }
1754
1755 static int smsc75xx_autosuspend(struct usbnet *dev, u32 link_up)
1756 {
1757         int ret;
1758
1759         if (!netif_running(dev->net)) {
1760                 /* interface is ifconfig down so fully power down hw */
1761                 netdev_dbg(dev->net, "autosuspend entering SUSPEND2\n");
1762                 return smsc75xx_enter_suspend2(dev);
1763         }
1764
1765         if (!link_up) {
1766                 /* link is down so enter EDPD mode */
1767                 netdev_dbg(dev->net, "autosuspend entering SUSPEND1\n");
1768
1769                 /* enable PHY wakeup events for if cable is attached */
1770                 ret = smsc75xx_enable_phy_wakeup_interrupts(dev,
1771                         PHY_INT_MASK_ANEG_COMP);
1772                 if (ret < 0) {
1773                         netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1774                         return ret;
1775                 }
1776
1777                 netdev_info(dev->net, "entering SUSPEND1 mode\n");
1778                 return smsc75xx_enter_suspend1(dev);
1779         }
1780
1781         /* enable PHY wakeup events so we remote wakeup if cable is pulled */
1782         ret = smsc75xx_enable_phy_wakeup_interrupts(dev,
1783                 PHY_INT_MASK_LINK_DOWN);
1784         if (ret < 0) {
1785                 netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1786                 return ret;
1787         }
1788
1789         netdev_dbg(dev->net, "autosuspend entering SUSPEND3\n");
1790         return smsc75xx_enter_suspend3(dev);
1791 }
1792
1793 static int smsc75xx_suspend(struct usb_interface *intf, pm_message_t message)
1794 {
1795         struct usbnet *dev = usb_get_intfdata(intf);
1796         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1797         u32 val, link_up;
1798         int ret;
1799
1800         ret = usbnet_suspend(intf, message);
1801         if (ret < 0) {
1802                 netdev_warn(dev->net, "usbnet_suspend error\n");
1803                 return ret;
1804         }
1805
1806         if (pdata->suspend_flags) {
1807                 netdev_warn(dev->net, "error during last resume\n");
1808                 pdata->suspend_flags = 0;
1809         }
1810
1811         /* determine if link is up using only _nopm functions */
1812         link_up = smsc75xx_link_ok_nopm(dev);
1813
1814         if (message.event == PM_EVENT_AUTO_SUSPEND) {
1815                 ret = smsc75xx_autosuspend(dev, link_up);
1816                 goto done;
1817         }
1818
1819         /* if we get this far we're not autosuspending */
1820         /* if no wol options set, or if link is down and we're not waking on
1821          * PHY activity, enter lowest power SUSPEND2 mode
1822          */
1823         if (!(pdata->wolopts & SUPPORTED_WAKE) ||
1824                 !(link_up || (pdata->wolopts & WAKE_PHY))) {
1825                 netdev_info(dev->net, "entering SUSPEND2 mode\n");
1826
1827                 /* disable energy detect (link up) & wake up events */
1828                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1829                 if (ret < 0) {
1830                         netdev_warn(dev->net, "Error reading WUCSR\n");
1831                         goto done;
1832                 }
1833
1834                 val &= ~(WUCSR_MPEN | WUCSR_WUEN);
1835
1836                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1837                 if (ret < 0) {
1838                         netdev_warn(dev->net, "Error writing WUCSR\n");
1839                         goto done;
1840                 }
1841
1842                 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1843                 if (ret < 0) {
1844                         netdev_warn(dev->net, "Error reading PMT_CTL\n");
1845                         goto done;
1846                 }
1847
1848                 val &= ~(PMT_CTL_ED_EN | PMT_CTL_WOL_EN);
1849
1850                 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1851                 if (ret < 0) {
1852                         netdev_warn(dev->net, "Error writing PMT_CTL\n");
1853                         goto done;
1854                 }
1855
1856                 ret = smsc75xx_enter_suspend2(dev);
1857                 goto done;
1858         }
1859
1860         if (pdata->wolopts & WAKE_PHY) {
1861                 ret = smsc75xx_enable_phy_wakeup_interrupts(dev,
1862                         (PHY_INT_MASK_ANEG_COMP | PHY_INT_MASK_LINK_DOWN));
1863                 if (ret < 0) {
1864                         netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1865                         goto done;
1866                 }
1867
1868                 /* if link is down then configure EDPD and enter SUSPEND1,
1869                  * otherwise enter SUSPEND0 below
1870                  */
1871                 if (!link_up) {
1872                         struct mii_if_info *mii = &dev->mii;
1873                         netdev_info(dev->net, "entering SUSPEND1 mode\n");
1874
1875                         /* enable energy detect power-down mode */
1876                         ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id,
1877                                 PHY_MODE_CTRL_STS);
1878                         if (ret < 0) {
1879                                 netdev_warn(dev->net, "Error reading PHY_MODE_CTRL_STS\n");
1880                                 goto done;
1881                         }
1882
1883                         ret |= MODE_CTRL_STS_EDPWRDOWN;
1884
1885                         smsc75xx_mdio_write_nopm(dev->net, mii->phy_id,
1886                                 PHY_MODE_CTRL_STS, ret);
1887
1888                         /* enter SUSPEND1 mode */
1889                         ret = smsc75xx_enter_suspend1(dev);
1890                         goto done;
1891                 }
1892         }
1893
1894         if (pdata->wolopts & (WAKE_MCAST | WAKE_ARP)) {
1895                 int i, filter = 0;
1896
1897                 /* disable all filters */
1898                 for (i = 0; i < WUF_NUM; i++) {
1899                         ret = smsc75xx_write_reg_nopm(dev, WUF_CFGX + i * 4, 0);
1900                         if (ret < 0) {
1901                                 netdev_warn(dev->net, "Error writing WUF_CFGX\n");
1902                                 goto done;
1903                         }
1904                 }
1905
1906                 if (pdata->wolopts & WAKE_MCAST) {
1907                         const u8 mcast[] = {0x01, 0x00, 0x5E};
1908                         netdev_info(dev->net, "enabling multicast detection\n");
1909
1910                         val = WUF_CFGX_EN | WUF_CFGX_ATYPE_MULTICAST
1911                                 | smsc_crc(mcast, 3);
1912                         ret = smsc75xx_write_wuff(dev, filter++, val, 0x0007);
1913                         if (ret < 0) {
1914                                 netdev_warn(dev->net, "Error writing wakeup filter\n");
1915                                 goto done;
1916                         }
1917                 }
1918
1919                 if (pdata->wolopts & WAKE_ARP) {
1920                         const u8 arp[] = {0x08, 0x06};
1921                         netdev_info(dev->net, "enabling ARP detection\n");
1922
1923                         val = WUF_CFGX_EN | WUF_CFGX_ATYPE_ALL | (0x0C << 16)
1924                                 | smsc_crc(arp, 2);
1925                         ret = smsc75xx_write_wuff(dev, filter++, val, 0x0003);
1926                         if (ret < 0) {
1927                                 netdev_warn(dev->net, "Error writing wakeup filter\n");
1928                                 goto done;
1929                         }
1930                 }
1931
1932                 /* clear any pending pattern match packet status */
1933                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1934                 if (ret < 0) {
1935                         netdev_warn(dev->net, "Error reading WUCSR\n");
1936                         goto done;
1937                 }
1938
1939                 val |= WUCSR_WUFR;
1940
1941                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1942                 if (ret < 0) {
1943                         netdev_warn(dev->net, "Error writing WUCSR\n");
1944                         goto done;
1945                 }
1946
1947                 netdev_info(dev->net, "enabling packet match detection\n");
1948                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1949                 if (ret < 0) {
1950                         netdev_warn(dev->net, "Error reading WUCSR\n");
1951                         goto done;
1952                 }
1953
1954                 val |= WUCSR_WUEN;
1955
1956                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1957                 if (ret < 0) {
1958                         netdev_warn(dev->net, "Error writing WUCSR\n");
1959                         goto done;
1960                 }
1961         } else {
1962                 netdev_info(dev->net, "disabling packet match detection\n");
1963                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1964                 if (ret < 0) {
1965                         netdev_warn(dev->net, "Error reading WUCSR\n");
1966                         goto done;
1967                 }
1968
1969                 val &= ~WUCSR_WUEN;
1970
1971                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1972                 if (ret < 0) {
1973                         netdev_warn(dev->net, "Error writing WUCSR\n");
1974                         goto done;
1975                 }
1976         }
1977
1978         /* disable magic, bcast & unicast wakeup sources */
1979         ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1980         if (ret < 0) {
1981                 netdev_warn(dev->net, "Error reading WUCSR\n");
1982                 goto done;
1983         }
1984
1985         val &= ~(WUCSR_MPEN | WUCSR_BCST_EN | WUCSR_PFDA_EN);
1986
1987         ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1988         if (ret < 0) {
1989                 netdev_warn(dev->net, "Error writing WUCSR\n");
1990                 goto done;
1991         }
1992
1993         if (pdata->wolopts & WAKE_PHY) {
1994                 netdev_info(dev->net, "enabling PHY wakeup\n");
1995
1996                 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1997                 if (ret < 0) {
1998                         netdev_warn(dev->net, "Error reading PMT_CTL\n");
1999                         goto done;
2000                 }
2001
2002                 /* clear wol status, enable energy detection */
2003                 val &= ~PMT_CTL_WUPS;
2004                 val |= (PMT_CTL_WUPS_ED | PMT_CTL_ED_EN);
2005
2006                 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
2007                 if (ret < 0) {
2008                         netdev_warn(dev->net, "Error writing PMT_CTL\n");
2009                         goto done;
2010                 }
2011         }
2012
2013         if (pdata->wolopts & WAKE_MAGIC) {
2014                 netdev_info(dev->net, "enabling magic packet wakeup\n");
2015                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
2016                 if (ret < 0) {
2017                         netdev_warn(dev->net, "Error reading WUCSR\n");
2018                         goto done;
2019                 }
2020
2021                 /* clear any pending magic packet status */
2022                 val |= WUCSR_MPR | WUCSR_MPEN;
2023
2024                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
2025                 if (ret < 0) {
2026                         netdev_warn(dev->net, "Error writing WUCSR\n");
2027                         goto done;
2028                 }
2029         }
2030
2031         if (pdata->wolopts & WAKE_BCAST) {
2032                 netdev_info(dev->net, "enabling broadcast detection\n");
2033                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
2034                 if (ret < 0) {
2035                         netdev_warn(dev->net, "Error reading WUCSR\n");
2036                         goto done;
2037                 }
2038
2039                 val |= WUCSR_BCAST_FR | WUCSR_BCST_EN;
2040
2041                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
2042                 if (ret < 0) {
2043                         netdev_warn(dev->net, "Error writing WUCSR\n");
2044                         goto done;
2045                 }
2046         }
2047
2048         if (pdata->wolopts & WAKE_UCAST) {
2049                 netdev_info(dev->net, "enabling unicast detection\n");
2050                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
2051                 if (ret < 0) {
2052                         netdev_warn(dev->net, "Error reading WUCSR\n");
2053                         goto done;
2054                 }
2055
2056                 val |= WUCSR_WUFR | WUCSR_PFDA_EN;
2057
2058                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
2059                 if (ret < 0) {
2060                         netdev_warn(dev->net, "Error writing WUCSR\n");
2061                         goto done;
2062                 }
2063         }
2064
2065         /* enable receiver to enable frame reception */
2066         ret = smsc75xx_read_reg_nopm(dev, MAC_RX, &val);
2067         if (ret < 0) {
2068                 netdev_warn(dev->net, "Failed to read MAC_RX: %d\n", ret);
2069                 goto done;
2070         }
2071
2072         val |= MAC_RX_RXEN;
2073
2074         ret = smsc75xx_write_reg_nopm(dev, MAC_RX, val);
2075         if (ret < 0) {
2076                 netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
2077                 goto done;
2078         }
2079
2080         /* some wol options are enabled, so enter SUSPEND0 */
2081         netdev_info(dev->net, "entering SUSPEND0 mode\n");
2082         ret = smsc75xx_enter_suspend0(dev);
2083
2084 done:
2085         /*
2086          * TODO: resume() might need to handle the suspend failure
2087          * in system sleep
2088          */
2089         if (ret && PMSG_IS_AUTO(message))
2090                 usbnet_resume(intf);
2091         return ret;
2092 }
2093
2094 static int smsc75xx_resume(struct usb_interface *intf)
2095 {
2096         struct usbnet *dev = usb_get_intfdata(intf);
2097         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
2098         u8 suspend_flags = pdata->suspend_flags;
2099         int ret;
2100         u32 val;
2101
2102         netdev_dbg(dev->net, "resume suspend_flags=0x%02x\n", suspend_flags);
2103
2104         /* do this first to ensure it's cleared even in error case */
2105         pdata->suspend_flags = 0;
2106
2107         if (suspend_flags & SUSPEND_ALLMODES) {
2108                 /* Disable wakeup sources */
2109                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
2110                 if (ret < 0) {
2111                         netdev_warn(dev->net, "Error reading WUCSR\n");
2112                         return ret;
2113                 }
2114
2115                 val &= ~(WUCSR_WUEN | WUCSR_MPEN | WUCSR_PFDA_EN
2116                         | WUCSR_BCST_EN);
2117
2118                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
2119                 if (ret < 0) {
2120                         netdev_warn(dev->net, "Error writing WUCSR\n");
2121                         return ret;
2122                 }
2123
2124                 /* clear wake-up status */
2125                 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
2126                 if (ret < 0) {
2127                         netdev_warn(dev->net, "Error reading PMT_CTL\n");
2128                         return ret;
2129                 }
2130
2131                 val &= ~PMT_CTL_WOL_EN;
2132                 val |= PMT_CTL_WUPS;
2133
2134                 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
2135                 if (ret < 0) {
2136                         netdev_warn(dev->net, "Error writing PMT_CTL\n");
2137                         return ret;
2138                 }
2139         }
2140
2141         if (suspend_flags & SUSPEND_SUSPEND2) {
2142                 netdev_info(dev->net, "resuming from SUSPEND2\n");
2143
2144                 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
2145                 if (ret < 0) {
2146                         netdev_warn(dev->net, "Error reading PMT_CTL\n");
2147                         return ret;
2148                 }
2149
2150                 val |= PMT_CTL_PHY_PWRUP;
2151
2152                 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
2153                 if (ret < 0) {
2154                         netdev_warn(dev->net, "Error writing PMT_CTL\n");
2155                         return ret;
2156                 }
2157         }
2158
2159         ret = smsc75xx_wait_ready(dev, 1);
2160         if (ret < 0) {
2161                 netdev_warn(dev->net, "device not ready in smsc75xx_resume\n");
2162                 return ret;
2163         }
2164
2165         return usbnet_resume(intf);
2166 }
2167
2168 static void smsc75xx_rx_csum_offload(struct usbnet *dev, struct sk_buff *skb,
2169                                      u32 rx_cmd_a, u32 rx_cmd_b)
2170 {
2171         if (!(dev->net->features & NETIF_F_RXCSUM) ||
2172             unlikely(rx_cmd_a & RX_CMD_A_LCSM)) {
2173                 skb->ip_summed = CHECKSUM_NONE;
2174         } else {
2175                 skb->csum = ntohs((u16)(rx_cmd_b >> RX_CMD_B_CSUM_SHIFT));
2176                 skb->ip_summed = CHECKSUM_COMPLETE;
2177         }
2178 }
2179
2180 static int smsc75xx_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
2181 {
2182         /* This check is no longer done by usbnet */
2183         if (skb->len < dev->net->hard_header_len)
2184                 return 0;
2185
2186         while (skb->len > 0) {
2187                 u32 rx_cmd_a, rx_cmd_b, align_count, size;
2188                 struct sk_buff *ax_skb;
2189                 unsigned char *packet;
2190
2191                 memcpy(&rx_cmd_a, skb->data, sizeof(rx_cmd_a));
2192                 le32_to_cpus(&rx_cmd_a);
2193                 skb_pull(skb, 4);
2194
2195                 memcpy(&rx_cmd_b, skb->data, sizeof(rx_cmd_b));
2196                 le32_to_cpus(&rx_cmd_b);
2197                 skb_pull(skb, 4 + RXW_PADDING);
2198
2199                 packet = skb->data;
2200
2201                 /* get the packet length */
2202                 size = (rx_cmd_a & RX_CMD_A_LEN) - RXW_PADDING;
2203                 align_count = (4 - ((size + RXW_PADDING) % 4)) % 4;
2204
2205                 if (unlikely(rx_cmd_a & RX_CMD_A_RED)) {
2206                         netif_dbg(dev, rx_err, dev->net,
2207                                   "Error rx_cmd_a=0x%08x\n", rx_cmd_a);
2208                         dev->net->stats.rx_errors++;
2209                         dev->net->stats.rx_dropped++;
2210
2211                         if (rx_cmd_a & RX_CMD_A_FCS)
2212                                 dev->net->stats.rx_crc_errors++;
2213                         else if (rx_cmd_a & (RX_CMD_A_LONG | RX_CMD_A_RUNT))
2214                                 dev->net->stats.rx_frame_errors++;
2215                 } else {
2216                         /* MAX_SINGLE_PACKET_SIZE + 4(CRC) + 2(COE) + 4(Vlan) */
2217                         if (unlikely(size > (MAX_SINGLE_PACKET_SIZE + ETH_HLEN + 12))) {
2218                                 netif_dbg(dev, rx_err, dev->net,
2219                                           "size err rx_cmd_a=0x%08x\n",
2220                                           rx_cmd_a);
2221                                 return 0;
2222                         }
2223
2224                         /* last frame in this batch */
2225                         if (skb->len == size) {
2226                                 smsc75xx_rx_csum_offload(dev, skb, rx_cmd_a,
2227                                         rx_cmd_b);
2228
2229                                 skb_trim(skb, skb->len - 4); /* remove fcs */
2230                                 skb->truesize = size + sizeof(struct sk_buff);
2231
2232                                 return 1;
2233                         }
2234
2235                         ax_skb = skb_clone(skb, GFP_ATOMIC);
2236                         if (unlikely(!ax_skb)) {
2237                                 netdev_warn(dev->net, "Error allocating skb\n");
2238                                 return 0;
2239                         }
2240
2241                         ax_skb->len = size;
2242                         ax_skb->data = packet;
2243                         skb_set_tail_pointer(ax_skb, size);
2244
2245                         smsc75xx_rx_csum_offload(dev, ax_skb, rx_cmd_a,
2246                                 rx_cmd_b);
2247
2248                         skb_trim(ax_skb, ax_skb->len - 4); /* remove fcs */
2249                         ax_skb->truesize = size + sizeof(struct sk_buff);
2250
2251                         usbnet_skb_return(dev, ax_skb);
2252                 }
2253
2254                 skb_pull(skb, size);
2255
2256                 /* padding bytes before the next frame starts */
2257                 if (skb->len)
2258                         skb_pull(skb, align_count);
2259         }
2260
2261         return 1;
2262 }
2263
2264 static struct sk_buff *smsc75xx_tx_fixup(struct usbnet *dev,
2265                                          struct sk_buff *skb, gfp_t flags)
2266 {
2267         u32 tx_cmd_a, tx_cmd_b;
2268
2269         if (skb_cow_head(skb, SMSC75XX_TX_OVERHEAD)) {
2270                 dev_kfree_skb_any(skb);
2271                 return NULL;
2272         }
2273
2274         tx_cmd_a = (u32)(skb->len & TX_CMD_A_LEN) | TX_CMD_A_FCS;
2275
2276         if (skb->ip_summed == CHECKSUM_PARTIAL)
2277                 tx_cmd_a |= TX_CMD_A_IPE | TX_CMD_A_TPE;
2278
2279         if (skb_is_gso(skb)) {
2280                 u16 mss = max(skb_shinfo(skb)->gso_size, TX_MSS_MIN);
2281                 tx_cmd_b = (mss << TX_CMD_B_MSS_SHIFT) & TX_CMD_B_MSS;
2282
2283                 tx_cmd_a |= TX_CMD_A_LSO;
2284         } else {
2285                 tx_cmd_b = 0;
2286         }
2287
2288         skb_push(skb, 4);
2289         cpu_to_le32s(&tx_cmd_b);
2290         memcpy(skb->data, &tx_cmd_b, 4);
2291
2292         skb_push(skb, 4);
2293         cpu_to_le32s(&tx_cmd_a);
2294         memcpy(skb->data, &tx_cmd_a, 4);
2295
2296         return skb;
2297 }
2298
2299 static int smsc75xx_manage_power(struct usbnet *dev, int on)
2300 {
2301         dev->intf->needs_remote_wakeup = on;
2302         return 0;
2303 }
2304
2305 static const struct driver_info smsc75xx_info = {
2306         .description    = "smsc75xx USB 2.0 Gigabit Ethernet",
2307         .bind           = smsc75xx_bind,
2308         .unbind         = smsc75xx_unbind,
2309         .link_reset     = smsc75xx_link_reset,
2310         .reset          = smsc75xx_reset,
2311         .rx_fixup       = smsc75xx_rx_fixup,
2312         .tx_fixup       = smsc75xx_tx_fixup,
2313         .status         = smsc75xx_status,
2314         .manage_power   = smsc75xx_manage_power,
2315         .flags          = FLAG_ETHER | FLAG_SEND_ZLP | FLAG_LINK_INTR,
2316 };
2317
2318 static const struct usb_device_id products[] = {
2319         {
2320                 /* SMSC7500 USB Gigabit Ethernet Device */
2321                 USB_DEVICE(USB_VENDOR_ID_SMSC, USB_PRODUCT_ID_LAN7500),
2322                 .driver_info = (unsigned long) &smsc75xx_info,
2323         },
2324         {
2325                 /* SMSC7500 USB Gigabit Ethernet Device */
2326                 USB_DEVICE(USB_VENDOR_ID_SMSC, USB_PRODUCT_ID_LAN7505),
2327                 .driver_info = (unsigned long) &smsc75xx_info,
2328         },
2329         { },            /* END */
2330 };
2331 MODULE_DEVICE_TABLE(usb, products);
2332
2333 static struct usb_driver smsc75xx_driver = {
2334         .name           = SMSC_CHIPNAME,
2335         .id_table       = products,
2336         .probe          = usbnet_probe,
2337         .suspend        = smsc75xx_suspend,
2338         .resume         = smsc75xx_resume,
2339         .reset_resume   = smsc75xx_resume,
2340         .disconnect     = usbnet_disconnect,
2341         .disable_hub_initiated_lpm = 1,
2342         .supports_autosuspend = 1,
2343 };
2344
2345 module_usb_driver(smsc75xx_driver);
2346
2347 MODULE_AUTHOR("Nancy Lin");
2348 MODULE_AUTHOR("Steve Glendinning <steve.glendinning@shawell.net>");
2349 MODULE_DESCRIPTION("SMSC75XX USB 2.0 Gigabit Ethernet Devices");
2350 MODULE_LICENSE("GPL");