drivers/net/usb/smsc75xx.c

   1  /***************************************************************************
   2  *
   3  * Copyright (C) 2007-2010 SMSC
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License
   7  * as published by the Free Software Foundation; either version 2
   8  * of the License, or (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  18  *
  19  *****************************************************************************/
  20
  21 #include <linux/module.h>
  22 #include <linux/kmod.h>
  23 #include <linux/init.h>
  24 #include <linux/netdevice.h>
  25 #include <linux/etherdevice.h>
  26 #include <linux/ethtool.h>
  27 #include <linux/mii.h>
  28 #include <linux/usb.h>
  29 #include <linux/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 DEFAULT_TSO_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_MAGIC)
  56
  57 #define check_warn(ret, fmt, args...) \
  58         ({ if (ret < 0) netdev_warn(dev->net, fmt, ##args); })
  59
  60 #define check_warn_return(ret, fmt, args...) \
  61         ({ if (ret < 0) { netdev_warn(dev->net, fmt, ##args); return ret; } })
  62
  63 #define check_warn_goto_done(ret, fmt, args...) \
  64         ({ if (ret < 0) { netdev_warn(dev->net, fmt, ##args); goto done; } })
  65
  66 struct smsc75xx_priv {
  67         struct usbnet *dev;
  68         u32 rfe_ctl;
  69         u32 wolopts;
  70         u32 multicast_hash_table[DP_SEL_VHF_HASH_LEN];
  71         struct mutex dataport_mutex;
  72         spinlock_t rfe_ctl_lock;
  73         struct work_struct set_multicast;
  74 };
  75
  76 struct usb_context {
  77         struct usb_ctrlrequest req;
  78         struct usbnet *dev;
  79 };
  80
  81 static bool turbo_mode = true;
  82 module_param(turbo_mode, bool, 0644);
  83 MODULE_PARM_DESC(turbo_mode, "Enable multiple frames per Rx transaction");
  84
  85 static int __must_check smsc75xx_read_reg(struct usbnet *dev, u32 index,
  86                                           u32 *data)
  87 {
  88         u32 buf;
  89         int ret;
  90
  91         BUG_ON(!dev);
  92
  93         ret = usbnet_read_cmd(dev, USB_VENDOR_REQUEST_READ_REGISTER,
  94                               USB_DIR_IN | USB_TYPE_VENDOR |
  95                               USB_RECIP_DEVICE,
  96                               0, index, &buf, 4);
  97         if (unlikely(ret < 0))
  98                 netdev_warn(dev->net,
  99                         "Failed to read reg index 0x%08x: %d", index, ret);
 100
 101         le32_to_cpus(&buf);
 102         *data = buf;
 103
 104         return ret;
 105 }
 106
 107 static int __must_check smsc75xx_write_reg(struct usbnet *dev, u32 index,
 108                                            u32 data)
 109 {
 110         u32 buf;
 111         int ret;
 112
 113         BUG_ON(!dev);
 114
 115         buf = data;
 116         cpu_to_le32s(&buf);
 117
 118         ret = usbnet_write_cmd(dev, USB_VENDOR_REQUEST_WRITE_REGISTER,
 119                                USB_DIR_OUT | USB_TYPE_VENDOR |
 120                                USB_RECIP_DEVICE,
 121                                0, index, &buf, 4);
 122         if (unlikely(ret < 0))
 123                 netdev_warn(dev->net,
 124                         "Failed to write reg index 0x%08x: %d", index, ret);
 125
 126         return ret;
 127 }
 128
 129 static int smsc75xx_set_feature(struct usbnet *dev, u32 feature)
 130 {
 131         if (WARN_ON_ONCE(!dev))
 132                 return -EINVAL;
 133
 134         cpu_to_le32s(&feature);
 135
 136         return usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0),
 137                 USB_REQ_SET_FEATURE, USB_RECIP_DEVICE, feature, 0, NULL, 0,
 138                 USB_CTRL_SET_TIMEOUT);
 139 }
 140
 141 static int smsc75xx_clear_feature(struct usbnet *dev, u32 feature)
 142 {
 143         if (WARN_ON_ONCE(!dev))
 144                 return -EINVAL;
 145
 146         cpu_to_le32s(&feature);
 147
 148         return usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0),
 149                 USB_REQ_CLEAR_FEATURE, USB_RECIP_DEVICE, feature, 0, NULL, 0,
 150                 USB_CTRL_SET_TIMEOUT);
 151 }
 152
 153 /* Loop until the read is completed with timeout
 154  * called with phy_mutex held */
 155 static int smsc75xx_phy_wait_not_busy(struct usbnet *dev)
 156 {
 157         unsigned long start_time = jiffies;
 158         u32 val;
 159         int ret;
 160
 161         do {
 162                 ret = smsc75xx_read_reg(dev, MII_ACCESS, &val);
 163                 check_warn_return(ret, "Error reading MII_ACCESS");
 164
 165                 if (!(val & MII_ACCESS_BUSY))
 166                         return 0;
 167         } while (!time_after(jiffies, start_time + HZ));
 168
 169         return -EIO;
 170 }
 171
 172 static int smsc75xx_mdio_read(struct net_device *netdev, int phy_id, int idx)
 173 {
 174         struct usbnet *dev = netdev_priv(netdev);
 175         u32 val, addr;
 176         int ret;
 177
 178         mutex_lock(&dev->phy_mutex);
 179
 180         /* confirm MII not busy */
 181         ret = smsc75xx_phy_wait_not_busy(dev);
 182         check_warn_goto_done(ret, "MII is busy in smsc75xx_mdio_read");
 183
 184         /* set the address, index & direction (read from PHY) */
 185         phy_id &= dev->mii.phy_id_mask;
 186         idx &= dev->mii.reg_num_mask;
 187         addr = ((phy_id << MII_ACCESS_PHY_ADDR_SHIFT) & MII_ACCESS_PHY_ADDR)
 188                 | ((idx << MII_ACCESS_REG_ADDR_SHIFT) & MII_ACCESS_REG_ADDR)
 189                 | MII_ACCESS_READ | MII_ACCESS_BUSY;
 190         ret = smsc75xx_write_reg(dev, MII_ACCESS, addr);
 191         check_warn_goto_done(ret, "Error writing MII_ACCESS");
 192
 193         ret = smsc75xx_phy_wait_not_busy(dev);
 194         check_warn_goto_done(ret, "Timed out reading MII reg %02X", idx);
 195
 196         ret = smsc75xx_read_reg(dev, MII_DATA, &val);
 197         check_warn_goto_done(ret, "Error reading MII_DATA");
 198
 199         ret = (u16)(val & 0xFFFF);
 200
 201 done:
 202         mutex_unlock(&dev->phy_mutex);
 203         return ret;
 204 }
 205
 206 static void smsc75xx_mdio_write(struct net_device *netdev, int phy_id, int idx,
 207                                 int regval)
 208 {
 209         struct usbnet *dev = netdev_priv(netdev);
 210         u32 val, addr;
 211         int ret;
 212
 213         mutex_lock(&dev->phy_mutex);
 214
 215         /* confirm MII not busy */
 216         ret = smsc75xx_phy_wait_not_busy(dev);
 217         check_warn_goto_done(ret, "MII is busy in smsc75xx_mdio_write");
 218
 219         val = regval;
 220         ret = smsc75xx_write_reg(dev, MII_DATA, val);
 221         check_warn_goto_done(ret, "Error writing MII_DATA");
 222
 223         /* set the address, index & direction (write to PHY) */
 224         phy_id &= dev->mii.phy_id_mask;
 225         idx &= dev->mii.reg_num_mask;
 226         addr = ((phy_id << MII_ACCESS_PHY_ADDR_SHIFT) & MII_ACCESS_PHY_ADDR)
 227                 | ((idx << MII_ACCESS_REG_ADDR_SHIFT) & MII_ACCESS_REG_ADDR)
 228                 | MII_ACCESS_WRITE | MII_ACCESS_BUSY;
 229         ret = smsc75xx_write_reg(dev, MII_ACCESS, addr);
 230         check_warn_goto_done(ret, "Error writing MII_ACCESS");
 231
 232         ret = smsc75xx_phy_wait_not_busy(dev);
 233         check_warn_goto_done(ret, "Timed out writing MII reg %02X", idx);
 234
 235 done:
 236         mutex_unlock(&dev->phy_mutex);
 237 }
 238
 239 static int smsc75xx_wait_eeprom(struct usbnet *dev)
 240 {
 241         unsigned long start_time = jiffies;
 242         u32 val;
 243         int ret;
 244
 245         do {
 246                 ret = smsc75xx_read_reg(dev, E2P_CMD, &val);
 247                 check_warn_return(ret, "Error reading E2P_CMD");
 248
 249                 if (!(val & E2P_CMD_BUSY) || (val & E2P_CMD_TIMEOUT))
 250                         break;
 251                 udelay(40);
 252         } while (!time_after(jiffies, start_time + HZ));
 253
 254         if (val & (E2P_CMD_TIMEOUT | E2P_CMD_BUSY)) {
 255                 netdev_warn(dev->net, "EEPROM read operation timeout");
 256                 return -EIO;
 257         }
 258
 259         return 0;
 260 }
 261
 262 static int smsc75xx_eeprom_confirm_not_busy(struct usbnet *dev)
 263 {
 264         unsigned long start_time = jiffies;
 265         u32 val;
 266         int ret;
 267
 268         do {
 269                 ret = smsc75xx_read_reg(dev, E2P_CMD, &val);
 270                 check_warn_return(ret, "Error reading E2P_CMD");
 271
 272                 if (!(val & E2P_CMD_BUSY))
 273                         return 0;
 274
 275                 udelay(40);
 276         } while (!time_after(jiffies, start_time + HZ));
 277
 278         netdev_warn(dev->net, "EEPROM is busy");
 279         return -EIO;
 280 }
 281
 282 static int smsc75xx_read_eeprom(struct usbnet *dev, u32 offset, u32 length,
 283                                 u8 *data)
 284 {
 285         u32 val;
 286         int i, ret;
 287
 288         BUG_ON(!dev);
 289         BUG_ON(!data);
 290
 291         ret = smsc75xx_eeprom_confirm_not_busy(dev);
 292         if (ret)
 293                 return ret;
 294
 295         for (i = 0; i < length; i++) {
 296                 val = E2P_CMD_BUSY | E2P_CMD_READ | (offset & E2P_CMD_ADDR);
 297                 ret = smsc75xx_write_reg(dev, E2P_CMD, val);
 298                 check_warn_return(ret, "Error writing E2P_CMD");
 299
 300                 ret = smsc75xx_wait_eeprom(dev);
 301                 if (ret < 0)
 302                         return ret;
 303
 304                 ret = smsc75xx_read_reg(dev, E2P_DATA, &val);
 305                 check_warn_return(ret, "Error reading E2P_DATA");
 306
 307                 data[i] = val & 0xFF;
 308                 offset++;
 309         }
 310
 311         return 0;
 312 }
 313
 314 static int smsc75xx_write_eeprom(struct usbnet *dev, u32 offset, u32 length,
 315                                  u8 *data)
 316 {
 317         u32 val;
 318         int i, ret;
 319
 320         BUG_ON(!dev);
 321         BUG_ON(!data);
 322
 323         ret = smsc75xx_eeprom_confirm_not_busy(dev);
 324         if (ret)
 325                 return ret;
 326
 327         /* Issue write/erase enable command */
 328         val = E2P_CMD_BUSY | E2P_CMD_EWEN;
 329         ret = smsc75xx_write_reg(dev, E2P_CMD, val);
 330         check_warn_return(ret, "Error writing E2P_CMD");
 331
 332         ret = smsc75xx_wait_eeprom(dev);
 333         if (ret < 0)
 334                 return ret;
 335
 336         for (i = 0; i < length; i++) {
 337
 338                 /* Fill data register */
 339                 val = data[i];
 340                 ret = smsc75xx_write_reg(dev, E2P_DATA, val);
 341                 check_warn_return(ret, "Error writing E2P_DATA");
 342
 343                 /* Send "write" command */
 344                 val = E2P_CMD_BUSY | E2P_CMD_WRITE | (offset & E2P_CMD_ADDR);
 345                 ret = smsc75xx_write_reg(dev, E2P_CMD, val);
 346                 check_warn_return(ret, "Error writing E2P_CMD");
 347
 348                 ret = smsc75xx_wait_eeprom(dev);
 349                 if (ret < 0)
 350                         return ret;
 351
 352                 offset++;
 353         }
 354
 355         return 0;
 356 }
 357
 358 static int smsc75xx_dataport_wait_not_busy(struct usbnet *dev)
 359 {
 360         int i, ret;
 361
 362         for (i = 0; i < 100; i++) {
 363                 u32 dp_sel;
 364                 ret = smsc75xx_read_reg(dev, DP_SEL, &dp_sel);
 365                 check_warn_return(ret, "Error reading DP_SEL");
 366
 367                 if (dp_sel & DP_SEL_DPRDY)
 368                         return 0;
 369
 370                 udelay(40);
 371         }
 372
 373         netdev_warn(dev->net, "smsc75xx_dataport_wait_not_busy timed out");
 374
 375         return -EIO;
 376 }
 377
 378 static int smsc75xx_dataport_write(struct usbnet *dev, u32 ram_select, u32 addr,
 379                                    u32 length, u32 *buf)
 380 {
 381         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 382         u32 dp_sel;
 383         int i, ret;
 384
 385         mutex_lock(&pdata->dataport_mutex);
 386
 387         ret = smsc75xx_dataport_wait_not_busy(dev);
 388         check_warn_goto_done(ret, "smsc75xx_dataport_write busy on entry");
 389
 390         ret = smsc75xx_read_reg(dev, DP_SEL, &dp_sel);
 391         check_warn_goto_done(ret, "Error reading DP_SEL");
 392
 393         dp_sel &= ~DP_SEL_RSEL;
 394         dp_sel |= ram_select;
 395         ret = smsc75xx_write_reg(dev, DP_SEL, dp_sel);
 396         check_warn_goto_done(ret, "Error writing DP_SEL");
 397
 398         for (i = 0; i < length; i++) {
 399                 ret = smsc75xx_write_reg(dev, DP_ADDR, addr + i);
 400                 check_warn_goto_done(ret, "Error writing DP_ADDR");
 401
 402                 ret = smsc75xx_write_reg(dev, DP_DATA, buf[i]);
 403                 check_warn_goto_done(ret, "Error writing DP_DATA");
 404
 405                 ret = smsc75xx_write_reg(dev, DP_CMD, DP_CMD_WRITE);
 406                 check_warn_goto_done(ret, "Error writing DP_CMD");
 407
 408                 ret = smsc75xx_dataport_wait_not_busy(dev);
 409                 check_warn_goto_done(ret, "smsc75xx_dataport_write timeout");
 410         }
 411
 412 done:
 413         mutex_unlock(&pdata->dataport_mutex);
 414         return ret;
 415 }
 416
 417 /* returns hash bit number for given MAC address */
 418 static u32 smsc75xx_hash(char addr[ETH_ALEN])
 419 {
 420         return (ether_crc(ETH_ALEN, addr) >> 23) & 0x1ff;
 421 }
 422
 423 static void smsc75xx_deferred_multicast_write(struct work_struct *param)
 424 {
 425         struct smsc75xx_priv *pdata =
 426                 container_of(param, struct smsc75xx_priv, set_multicast);
 427         struct usbnet *dev = pdata->dev;
 428         int ret;
 429
 430         netif_dbg(dev, drv, dev->net, "deferred multicast write 0x%08x",
 431                 pdata->rfe_ctl);
 432
 433         smsc75xx_dataport_write(dev, DP_SEL_VHF, DP_SEL_VHF_VLAN_LEN,
 434                 DP_SEL_VHF_HASH_LEN, pdata->multicast_hash_table);
 435
 436         ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
 437         check_warn(ret, "Error writing RFE_CRL");
 438 }
 439
 440 static void smsc75xx_set_multicast(struct net_device *netdev)
 441 {
 442         struct usbnet *dev = netdev_priv(netdev);
 443         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 444         unsigned long flags;
 445         int i;
 446
 447         spin_lock_irqsave(&pdata->rfe_ctl_lock, flags);
 448
 449         pdata->rfe_ctl &=
 450                 ~(RFE_CTL_AU | RFE_CTL_AM | RFE_CTL_DPF | RFE_CTL_MHF);
 451         pdata->rfe_ctl |= RFE_CTL_AB;
 452
 453         for (i = 0; i < DP_SEL_VHF_HASH_LEN; i++)
 454                 pdata->multicast_hash_table[i] = 0;
 455
 456         if (dev->net->flags & IFF_PROMISC) {
 457                 netif_dbg(dev, drv, dev->net, "promiscuous mode enabled");
 458                 pdata->rfe_ctl |= RFE_CTL_AM | RFE_CTL_AU;
 459         } else if (dev->net->flags & IFF_ALLMULTI) {
 460                 netif_dbg(dev, drv, dev->net, "receive all multicast enabled");
 461                 pdata->rfe_ctl |= RFE_CTL_AM | RFE_CTL_DPF;
 462         } else if (!netdev_mc_empty(dev->net)) {
 463                 struct netdev_hw_addr *ha;
 464
 465                 netif_dbg(dev, drv, dev->net, "receive multicast hash filter");
 466
 467                 pdata->rfe_ctl |= RFE_CTL_MHF | RFE_CTL_DPF;
 468
 469                 netdev_for_each_mc_addr(ha, netdev) {
 470                         u32 bitnum = smsc75xx_hash(ha->addr);
 471                         pdata->multicast_hash_table[bitnum / 32] |=
 472                                 (1 << (bitnum % 32));
 473                 }
 474         } else {
 475                 netif_dbg(dev, drv, dev->net, "receive own packets only");
 476                 pdata->rfe_ctl |= RFE_CTL_DPF;
 477         }
 478
 479         spin_unlock_irqrestore(&pdata->rfe_ctl_lock, flags);
 480
 481         /* defer register writes to a sleepable context */
 482         schedule_work(&pdata->set_multicast);
 483 }
 484
 485 static int smsc75xx_update_flowcontrol(struct usbnet *dev, u8 duplex,
 486                                             u16 lcladv, u16 rmtadv)
 487 {
 488         u32 flow = 0, fct_flow = 0;
 489         int ret;
 490
 491         if (duplex == DUPLEX_FULL) {
 492                 u8 cap = mii_resolve_flowctrl_fdx(lcladv, rmtadv);
 493
 494                 if (cap & FLOW_CTRL_TX) {
 495                         flow = (FLOW_TX_FCEN | 0xFFFF);
 496                         /* set fct_flow thresholds to 20% and 80% */
 497                         fct_flow = (8 << 8) | 32;
 498                 }
 499
 500                 if (cap & FLOW_CTRL_RX)
 501                         flow |= FLOW_RX_FCEN;
 502
 503                 netif_dbg(dev, link, dev->net, "rx pause %s, tx pause %s",
 504                         (cap & FLOW_CTRL_RX ? "enabled" : "disabled"),
 505                         (cap & FLOW_CTRL_TX ? "enabled" : "disabled"));
 506         } else {
 507                 netif_dbg(dev, link, dev->net, "half duplex");
 508         }
 509
 510         ret = smsc75xx_write_reg(dev, FLOW, flow);
 511         check_warn_return(ret, "Error writing FLOW");
 512
 513         ret = smsc75xx_write_reg(dev, FCT_FLOW, fct_flow);
 514         check_warn_return(ret, "Error writing FCT_FLOW");
 515
 516         return 0;
 517 }
 518
 519 static int smsc75xx_link_reset(struct usbnet *dev)
 520 {
 521         struct mii_if_info *mii = &dev->mii;
 522         struct ethtool_cmd ecmd = { .cmd = ETHTOOL_GSET };
 523         u16 lcladv, rmtadv;
 524         int ret;
 525
 526         /* write to clear phy interrupt status */
 527         smsc75xx_mdio_write(dev->net, mii->phy_id, PHY_INT_SRC,
 528                 PHY_INT_SRC_CLEAR_ALL);
 529
 530         ret = smsc75xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL);
 531         check_warn_return(ret, "Error writing INT_STS");
 532
 533         mii_check_media(mii, 1, 1);
 534         mii_ethtool_gset(&dev->mii, &ecmd);
 535         lcladv = smsc75xx_mdio_read(dev->net, mii->phy_id, MII_ADVERTISE);
 536         rmtadv = smsc75xx_mdio_read(dev->net, mii->phy_id, MII_LPA);
 537
 538         netif_dbg(dev, link, dev->net, "speed: %u duplex: %d lcladv: %04x"
 539                   " rmtadv: %04x", ethtool_cmd_speed(&ecmd),
 540                   ecmd.duplex, lcladv, rmtadv);
 541
 542         return smsc75xx_update_flowcontrol(dev, ecmd.duplex, lcladv, rmtadv);
 543 }
 544
 545 static void smsc75xx_status(struct usbnet *dev, struct urb *urb)
 546 {
 547         u32 intdata;
 548
 549         if (urb->actual_length != 4) {
 550                 netdev_warn(dev->net,
 551                         "unexpected urb length %d", urb->actual_length);
 552                 return;
 553         }
 554
 555         memcpy(&intdata, urb->transfer_buffer, 4);
 556         le32_to_cpus(&intdata);
 557
 558         netif_dbg(dev, link, dev->net, "intdata: 0x%08X", intdata);
 559
 560         if (intdata & INT_ENP_PHY_INT)
 561                 usbnet_defer_kevent(dev, EVENT_LINK_RESET);
 562         else
 563                 netdev_warn(dev->net,
 564                         "unexpected interrupt, intdata=0x%08X", intdata);
 565 }
 566
 567 static int smsc75xx_ethtool_get_eeprom_len(struct net_device *net)
 568 {
 569         return MAX_EEPROM_SIZE;
 570 }
 571
 572 static int smsc75xx_ethtool_get_eeprom(struct net_device *netdev,
 573                                        struct ethtool_eeprom *ee, u8 *data)
 574 {
 575         struct usbnet *dev = netdev_priv(netdev);
 576
 577         ee->magic = LAN75XX_EEPROM_MAGIC;
 578
 579         return smsc75xx_read_eeprom(dev, ee->offset, ee->len, data);
 580 }
 581
 582 static int smsc75xx_ethtool_set_eeprom(struct net_device *netdev,
 583                                        struct ethtool_eeprom *ee, u8 *data)
 584 {
 585         struct usbnet *dev = netdev_priv(netdev);
 586
 587         if (ee->magic != LAN75XX_EEPROM_MAGIC) {
 588                 netdev_warn(dev->net,
 589                         "EEPROM: magic value mismatch: 0x%x", ee->magic);
 590                 return -EINVAL;
 591         }
 592
 593         return smsc75xx_write_eeprom(dev, ee->offset, ee->len, data);
 594 }
 595
 596 static void smsc75xx_ethtool_get_wol(struct net_device *net,
 597                                      struct ethtool_wolinfo *wolinfo)
 598 {
 599         struct usbnet *dev = netdev_priv(net);
 600         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 601
 602         wolinfo->supported = SUPPORTED_WAKE;
 603         wolinfo->wolopts = pdata->wolopts;
 604 }
 605
 606 static int smsc75xx_ethtool_set_wol(struct net_device *net,
 607                                     struct ethtool_wolinfo *wolinfo)
 608 {
 609         struct usbnet *dev = netdev_priv(net);
 610         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 611
 612         pdata->wolopts = wolinfo->wolopts & SUPPORTED_WAKE;
 613         return 0;
 614 }
 615
 616 static const struct ethtool_ops smsc75xx_ethtool_ops = {
 617         .get_link       = usbnet_get_link,
 618         .nway_reset     = usbnet_nway_reset,
 619         .get_drvinfo    = usbnet_get_drvinfo,
 620         .get_msglevel   = usbnet_get_msglevel,
 621         .set_msglevel   = usbnet_set_msglevel,
 622         .get_settings   = usbnet_get_settings,
 623         .set_settings   = usbnet_set_settings,
 624         .get_eeprom_len = smsc75xx_ethtool_get_eeprom_len,
 625         .get_eeprom     = smsc75xx_ethtool_get_eeprom,
 626         .set_eeprom     = smsc75xx_ethtool_set_eeprom,
 627         .get_wol        = smsc75xx_ethtool_get_wol,
 628         .set_wol        = smsc75xx_ethtool_set_wol,
 629 };
 630
 631 static int smsc75xx_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
 632 {
 633         struct usbnet *dev = netdev_priv(netdev);
 634
 635         if (!netif_running(netdev))
 636                 return -EINVAL;
 637
 638         return generic_mii_ioctl(&dev->mii, if_mii(rq), cmd, NULL);
 639 }
 640
 641 static void smsc75xx_init_mac_address(struct usbnet *dev)
 642 {
 643         /* try reading mac address from EEPROM */
 644         if (smsc75xx_read_eeprom(dev, EEPROM_MAC_OFFSET, ETH_ALEN,
 645                         dev->net->dev_addr) == 0) {
 646                 if (is_valid_ether_addr(dev->net->dev_addr)) {
 647                         /* eeprom values are valid so use them */
 648                         netif_dbg(dev, ifup, dev->net,
 649                                 "MAC address read from EEPROM");
 650                         return;
 651                 }
 652         }
 653
 654         /* no eeprom, or eeprom values are invalid. generate random MAC */
 655         eth_hw_addr_random(dev->net);
 656         netif_dbg(dev, ifup, dev->net, "MAC address set to eth_random_addr");
 657 }
 658
 659 static int smsc75xx_set_mac_address(struct usbnet *dev)
 660 {
 661         u32 addr_lo = dev->net->dev_addr[0] | dev->net->dev_addr[1] << 8 |
 662                 dev->net->dev_addr[2] << 16 | dev->net->dev_addr[3] << 24;
 663         u32 addr_hi = dev->net->dev_addr[4] | dev->net->dev_addr[5] << 8;
 664
 665         int ret = smsc75xx_write_reg(dev, RX_ADDRH, addr_hi);
 666         check_warn_return(ret, "Failed to write RX_ADDRH: %d", ret);
 667
 668         ret = smsc75xx_write_reg(dev, RX_ADDRL, addr_lo);
 669         check_warn_return(ret, "Failed to write RX_ADDRL: %d", ret);
 670
 671         addr_hi |= ADDR_FILTX_FB_VALID;
 672         ret = smsc75xx_write_reg(dev, ADDR_FILTX, addr_hi);
 673         check_warn_return(ret, "Failed to write ADDR_FILTX: %d", ret);
 674
 675         ret = smsc75xx_write_reg(dev, ADDR_FILTX + 4, addr_lo);
 676         check_warn_return(ret, "Failed to write ADDR_FILTX+4: %d", ret);
 677
 678         return 0;
 679 }
 680
 681 static int smsc75xx_phy_initialize(struct usbnet *dev)
 682 {
 683         int bmcr, ret, timeout = 0;
 684
 685         /* Initialize MII structure */
 686         dev->mii.dev = dev->net;
 687         dev->mii.mdio_read = smsc75xx_mdio_read;
 688         dev->mii.mdio_write = smsc75xx_mdio_write;
 689         dev->mii.phy_id_mask = 0x1f;
 690         dev->mii.reg_num_mask = 0x1f;
 691         dev->mii.supports_gmii = 1;
 692         dev->mii.phy_id = SMSC75XX_INTERNAL_PHY_ID;
 693
 694         /* reset phy and wait for reset to complete */
 695         smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_BMCR, BMCR_RESET);
 696
 697         do {
 698                 msleep(10);
 699                 bmcr = smsc75xx_mdio_read(dev->net, dev->mii.phy_id, MII_BMCR);
 700                 check_warn_return(bmcr, "Error reading MII_BMCR");
 701                 timeout++;
 702         } while ((bmcr & BMCR_RESET) && (timeout < 100));
 703
 704         if (timeout >= 100) {
 705                 netdev_warn(dev->net, "timeout on PHY Reset");
 706                 return -EIO;
 707         }
 708
 709         smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_ADVERTISE,
 710                 ADVERTISE_ALL | ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP |
 711                 ADVERTISE_PAUSE_ASYM);
 712         smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_CTRL1000,
 713                 ADVERTISE_1000FULL);
 714
 715         /* read and write to clear phy interrupt status */
 716         ret = smsc75xx_mdio_read(dev->net, dev->mii.phy_id, PHY_INT_SRC);
 717         check_warn_return(ret, "Error reading PHY_INT_SRC");
 718         smsc75xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_SRC, 0xffff);
 719
 720         smsc75xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_MASK,
 721                 PHY_INT_MASK_DEFAULT);
 722         mii_nway_restart(&dev->mii);
 723
 724         netif_dbg(dev, ifup, dev->net, "phy initialised successfully");
 725         return 0;
 726 }
 727
 728 static int smsc75xx_set_rx_max_frame_length(struct usbnet *dev, int size)
 729 {
 730         int ret = 0;
 731         u32 buf;
 732         bool rxenabled;
 733
 734         ret = smsc75xx_read_reg(dev, MAC_RX, &buf);
 735         check_warn_return(ret, "Failed to read MAC_RX: %d", ret);
 736
 737         rxenabled = ((buf & MAC_RX_RXEN) != 0);
 738
 739         if (rxenabled) {
 740                 buf &= ~MAC_RX_RXEN;
 741                 ret = smsc75xx_write_reg(dev, MAC_RX, buf);
 742                 check_warn_return(ret, "Failed to write MAC_RX: %d", ret);
 743         }
 744
 745         /* add 4 to size for FCS */
 746         buf &= ~MAC_RX_MAX_SIZE;
 747         buf |= (((size + 4) << MAC_RX_MAX_SIZE_SHIFT) & MAC_RX_MAX_SIZE);
 748
 749         ret = smsc75xx_write_reg(dev, MAC_RX, buf);
 750         check_warn_return(ret, "Failed to write MAC_RX: %d", ret);
 751
 752         if (rxenabled) {
 753                 buf |= MAC_RX_RXEN;
 754                 ret = smsc75xx_write_reg(dev, MAC_RX, buf);
 755                 check_warn_return(ret, "Failed to write MAC_RX: %d", ret);
 756         }
 757
 758         return 0;
 759 }
 760
 761 static int smsc75xx_change_mtu(struct net_device *netdev, int new_mtu)
 762 {
 763         struct usbnet *dev = netdev_priv(netdev);
 764
 765         int ret = smsc75xx_set_rx_max_frame_length(dev, new_mtu);
 766         check_warn_return(ret, "Failed to set mac rx frame length");
 767
 768         return usbnet_change_mtu(netdev, new_mtu);
 769 }
 770
 771 /* Enable or disable Rx checksum offload engine */
 772 static int smsc75xx_set_features(struct net_device *netdev,
 773         netdev_features_t features)
 774 {
 775         struct usbnet *dev = netdev_priv(netdev);
 776         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 777         unsigned long flags;
 778         int ret;
 779
 780         spin_lock_irqsave(&pdata->rfe_ctl_lock, flags);
 781
 782         if (features & NETIF_F_RXCSUM)
 783                 pdata->rfe_ctl |= RFE_CTL_TCPUDP_CKM | RFE_CTL_IP_CKM;
 784         else
 785                 pdata->rfe_ctl &= ~(RFE_CTL_TCPUDP_CKM | RFE_CTL_IP_CKM);
 786
 787         spin_unlock_irqrestore(&pdata->rfe_ctl_lock, flags);
 788         /* it's racing here! */
 789
 790         ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
 791         check_warn_return(ret, "Error writing RFE_CTL");
 792
 793         return 0;
 794 }
 795
 796 static int smsc75xx_wait_ready(struct usbnet *dev)
 797 {
 798         int timeout = 0;
 799
 800         do {
 801                 u32 buf;
 802                 int ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
 803                 check_warn_return(ret, "Failed to read PMT_CTL: %d", ret);
 804
 805                 if (buf & PMT_CTL_DEV_RDY)
 806                         return 0;
 807
 808                 msleep(10);
 809                 timeout++;
 810         } while (timeout < 100);
 811
 812         netdev_warn(dev->net, "timeout waiting for device ready");
 813         return -EIO;
 814 }
 815
 816 static int smsc75xx_reset(struct usbnet *dev)
 817 {
 818         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 819         u32 buf;
 820         int ret = 0, timeout;
 821
 822         netif_dbg(dev, ifup, dev->net, "entering smsc75xx_reset");
 823
 824         ret = smsc75xx_wait_ready(dev);
 825         check_warn_return(ret, "device not ready in smsc75xx_reset");
 826
 827         ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
 828         check_warn_return(ret, "Failed to read HW_CFG: %d", ret);
 829
 830         buf |= HW_CFG_LRST;
 831
 832         ret = smsc75xx_write_reg(dev, HW_CFG, buf);
 833         check_warn_return(ret, "Failed to write HW_CFG: %d", ret);
 834
 835         timeout = 0;
 836         do {
 837                 msleep(10);
 838                 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
 839                 check_warn_return(ret, "Failed to read HW_CFG: %d", ret);
 840                 timeout++;
 841         } while ((buf & HW_CFG_LRST) && (timeout < 100));
 842
 843         if (timeout >= 100) {
 844                 netdev_warn(dev->net, "timeout on completion of Lite Reset");
 845                 return -EIO;
 846         }
 847
 848         netif_dbg(dev, ifup, dev->net, "Lite reset complete, resetting PHY");
 849
 850         ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
 851         check_warn_return(ret, "Failed to read PMT_CTL: %d", ret);
 852
 853         buf |= PMT_CTL_PHY_RST;
 854
 855         ret = smsc75xx_write_reg(dev, PMT_CTL, buf);
 856         check_warn_return(ret, "Failed to write PMT_CTL: %d", ret);
 857
 858         timeout = 0;
 859         do {
 860                 msleep(10);
 861                 ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
 862                 check_warn_return(ret, "Failed to read PMT_CTL: %d", ret);
 863                 timeout++;
 864         } while ((buf & PMT_CTL_PHY_RST) && (timeout < 100));
 865
 866         if (timeout >= 100) {
 867                 netdev_warn(dev->net, "timeout waiting for PHY Reset");
 868                 return -EIO;
 869         }
 870
 871         netif_dbg(dev, ifup, dev->net, "PHY reset complete");
 872
 873         smsc75xx_init_mac_address(dev);
 874
 875         ret = smsc75xx_set_mac_address(dev);
 876         check_warn_return(ret, "Failed to set mac address");
 877
 878         netif_dbg(dev, ifup, dev->net, "MAC Address: %pM", dev->net->dev_addr);
 879
 880         ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
 881         check_warn_return(ret, "Failed to read HW_CFG: %d", ret);
 882
 883         netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG : 0x%08x", buf);
 884
 885         buf |= HW_CFG_BIR;
 886
 887         ret = smsc75xx_write_reg(dev, HW_CFG, buf);
 888         check_warn_return(ret, "Failed to write HW_CFG: %d", ret);
 889
 890         ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
 891         check_warn_return(ret, "Failed to read HW_CFG: %d", ret);
 892
 893         netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG after "
 894                         "writing HW_CFG_BIR: 0x%08x", buf);
 895
 896         if (!turbo_mode) {
 897                 buf = 0;
 898                 dev->rx_urb_size = MAX_SINGLE_PACKET_SIZE;
 899         } else if (dev->udev->speed == USB_SPEED_HIGH) {
 900                 buf = DEFAULT_HS_BURST_CAP_SIZE / HS_USB_PKT_SIZE;
 901                 dev->rx_urb_size = DEFAULT_HS_BURST_CAP_SIZE;
 902         } else {
 903                 buf = DEFAULT_FS_BURST_CAP_SIZE / FS_USB_PKT_SIZE;
 904                 dev->rx_urb_size = DEFAULT_FS_BURST_CAP_SIZE;
 905         }
 906
 907         netif_dbg(dev, ifup, dev->net, "rx_urb_size=%ld",
 908                 (ulong)dev->rx_urb_size);
 909
 910         ret = smsc75xx_write_reg(dev, BURST_CAP, buf);
 911         check_warn_return(ret, "Failed to write BURST_CAP: %d", ret);
 912
 913         ret = smsc75xx_read_reg(dev, BURST_CAP, &buf);
 914         check_warn_return(ret, "Failed to read BURST_CAP: %d", ret);
 915
 916         netif_dbg(dev, ifup, dev->net,
 917                 "Read Value from BURST_CAP after writing: 0x%08x", buf);
 918
 919         ret = smsc75xx_write_reg(dev, BULK_IN_DLY, DEFAULT_BULK_IN_DELAY);
 920         check_warn_return(ret, "Failed to write BULK_IN_DLY: %d", ret);
 921
 922         ret = smsc75xx_read_reg(dev, BULK_IN_DLY, &buf);
 923         check_warn_return(ret, "Failed to read BULK_IN_DLY: %d", ret);
 924
 925         netif_dbg(dev, ifup, dev->net,
 926                 "Read Value from BULK_IN_DLY after writing: 0x%08x", buf);
 927
 928         if (turbo_mode) {
 929                 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
 930                 check_warn_return(ret, "Failed to read HW_CFG: %d", ret);
 931
 932                 netif_dbg(dev, ifup, dev->net, "HW_CFG: 0x%08x", buf);
 933
 934                 buf |= (HW_CFG_MEF | HW_CFG_BCE);
 935
 936                 ret = smsc75xx_write_reg(dev, HW_CFG, buf);
 937                 check_warn_return(ret, "Failed to write HW_CFG: %d", ret);
 938
 939                 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
 940                 check_warn_return(ret, "Failed to read HW_CFG: %d", ret);
 941
 942                 netif_dbg(dev, ifup, dev->net, "HW_CFG: 0x%08x", buf);
 943         }
 944
 945         /* set FIFO sizes */
 946         buf = (MAX_RX_FIFO_SIZE - 512) / 512;
 947         ret = smsc75xx_write_reg(dev, FCT_RX_FIFO_END, buf);
 948         check_warn_return(ret, "Failed to write FCT_RX_FIFO_END: %d", ret);
 949
 950         netif_dbg(dev, ifup, dev->net, "FCT_RX_FIFO_END set to 0x%08x", buf);
 951
 952         buf = (MAX_TX_FIFO_SIZE - 512) / 512;
 953         ret = smsc75xx_write_reg(dev, FCT_TX_FIFO_END, buf);
 954         check_warn_return(ret, "Failed to write FCT_TX_FIFO_END: %d", ret);
 955
 956         netif_dbg(dev, ifup, dev->net, "FCT_TX_FIFO_END set to 0x%08x", buf);
 957
 958         ret = smsc75xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL);
 959         check_warn_return(ret, "Failed to write INT_STS: %d", ret);
 960
 961         ret = smsc75xx_read_reg(dev, ID_REV, &buf);
 962         check_warn_return(ret, "Failed to read ID_REV: %d", ret);
 963
 964         netif_dbg(dev, ifup, dev->net, "ID_REV = 0x%08x", buf);
 965
 966         ret = smsc75xx_read_reg(dev, E2P_CMD, &buf);
 967         check_warn_return(ret, "Failed to read E2P_CMD: %d", ret);
 968
 969         /* only set default GPIO/LED settings if no EEPROM is detected */
 970         if (!(buf & E2P_CMD_LOADED)) {
 971                 ret = smsc75xx_read_reg(dev, LED_GPIO_CFG, &buf);
 972                 check_warn_return(ret, "Failed to read LED_GPIO_CFG: %d", ret);
 973
 974                 buf &= ~(LED_GPIO_CFG_LED2_FUN_SEL | LED_GPIO_CFG_LED10_FUN_SEL);
 975                 buf |= LED_GPIO_CFG_LEDGPIO_EN | LED_GPIO_CFG_LED2_FUN_SEL;
 976
 977                 ret = smsc75xx_write_reg(dev, LED_GPIO_CFG, buf);
 978                 check_warn_return(ret, "Failed to write LED_GPIO_CFG: %d", ret);
 979         }
 980
 981         ret = smsc75xx_write_reg(dev, FLOW, 0);
 982         check_warn_return(ret, "Failed to write FLOW: %d", ret);
 983
 984         ret = smsc75xx_write_reg(dev, FCT_FLOW, 0);
 985         check_warn_return(ret, "Failed to write FCT_FLOW: %d", ret);
 986
 987         /* Don't need rfe_ctl_lock during initialisation */
 988         ret = smsc75xx_read_reg(dev, RFE_CTL, &pdata->rfe_ctl);
 989         check_warn_return(ret, "Failed to read RFE_CTL: %d", ret);
 990
 991         pdata->rfe_ctl |= RFE_CTL_AB | RFE_CTL_DPF;
 992
 993         ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
 994         check_warn_return(ret, "Failed to write RFE_CTL: %d", ret);
 995
 996         ret = smsc75xx_read_reg(dev, RFE_CTL, &pdata->rfe_ctl);
 997         check_warn_return(ret, "Failed to read RFE_CTL: %d", ret);
 998
 999         netif_dbg(dev, ifup, dev->net, "RFE_CTL set to 0x%08x", pdata->rfe_ctl);
1000
1001         /* Enable or disable checksum offload engines */
1002         smsc75xx_set_features(dev->net, dev->net->features);
1003
1004         smsc75xx_set_multicast(dev->net);
1005
1006         ret = smsc75xx_phy_initialize(dev);
1007         check_warn_return(ret, "Failed to initialize PHY: %d", ret);
1008
1009         ret = smsc75xx_read_reg(dev, INT_EP_CTL, &buf);
1010         check_warn_return(ret, "Failed to read INT_EP_CTL: %d", ret);
1011
1012         /* enable PHY interrupts */
1013         buf |= INT_ENP_PHY_INT;
1014
1015         ret = smsc75xx_write_reg(dev, INT_EP_CTL, buf);
1016         check_warn_return(ret, "Failed to write INT_EP_CTL: %d", ret);
1017
1018         /* allow mac to detect speed and duplex from phy */
1019         ret = smsc75xx_read_reg(dev, MAC_CR, &buf);
1020         check_warn_return(ret, "Failed to read MAC_CR: %d", ret);
1021
1022         buf |= (MAC_CR_ADD | MAC_CR_ASD);
1023         ret = smsc75xx_write_reg(dev, MAC_CR, buf);
1024         check_warn_return(ret, "Failed to write MAC_CR: %d", ret);
1025
1026         ret = smsc75xx_read_reg(dev, MAC_TX, &buf);
1027         check_warn_return(ret, "Failed to read MAC_TX: %d", ret);
1028
1029         buf |= MAC_TX_TXEN;
1030
1031         ret = smsc75xx_write_reg(dev, MAC_TX, buf);
1032         check_warn_return(ret, "Failed to write MAC_TX: %d", ret);
1033
1034         netif_dbg(dev, ifup, dev->net, "MAC_TX set to 0x%08x", buf);
1035
1036         ret = smsc75xx_read_reg(dev, FCT_TX_CTL, &buf);
1037         check_warn_return(ret, "Failed to read FCT_TX_CTL: %d", ret);
1038
1039         buf |= FCT_TX_CTL_EN;
1040
1041         ret = smsc75xx_write_reg(dev, FCT_TX_CTL, buf);
1042         check_warn_return(ret, "Failed to write FCT_TX_CTL: %d", ret);
1043
1044         netif_dbg(dev, ifup, dev->net, "FCT_TX_CTL set to 0x%08x", buf);
1045
1046         ret = smsc75xx_set_rx_max_frame_length(dev, 1514);
1047         check_warn_return(ret, "Failed to set max rx frame length");
1048
1049         ret = smsc75xx_read_reg(dev, MAC_RX, &buf);
1050         check_warn_return(ret, "Failed to read MAC_RX: %d", ret);
1051
1052         buf |= MAC_RX_RXEN;
1053
1054         ret = smsc75xx_write_reg(dev, MAC_RX, buf);
1055         check_warn_return(ret, "Failed to write MAC_RX: %d", ret);
1056
1057         netif_dbg(dev, ifup, dev->net, "MAC_RX set to 0x%08x", buf);
1058
1059         ret = smsc75xx_read_reg(dev, FCT_RX_CTL, &buf);
1060         check_warn_return(ret, "Failed to read FCT_RX_CTL: %d", ret);
1061
1062         buf |= FCT_RX_CTL_EN;
1063
1064         ret = smsc75xx_write_reg(dev, FCT_RX_CTL, buf);
1065         check_warn_return(ret, "Failed to write FCT_RX_CTL: %d", ret);
1066
1067         netif_dbg(dev, ifup, dev->net, "FCT_RX_CTL set to 0x%08x", buf);
1068
1069         netif_dbg(dev, ifup, dev->net, "smsc75xx_reset, return 0");
1070         return 0;
1071 }
1072
1073 static const struct net_device_ops smsc75xx_netdev_ops = {
1074         .ndo_open               = usbnet_open,
1075         .ndo_stop               = usbnet_stop,
1076         .ndo_start_xmit         = usbnet_start_xmit,
1077         .ndo_tx_timeout         = usbnet_tx_timeout,
1078         .ndo_change_mtu         = smsc75xx_change_mtu,
1079         .ndo_set_mac_address    = eth_mac_addr,
1080         .ndo_validate_addr      = eth_validate_addr,
1081         .ndo_do_ioctl           = smsc75xx_ioctl,
1082         .ndo_set_rx_mode        = smsc75xx_set_multicast,
1083         .ndo_set_features       = smsc75xx_set_features,
1084 };
1085
1086 static int smsc75xx_bind(struct usbnet *dev, struct usb_interface *intf)
1087 {
1088         struct smsc75xx_priv *pdata = NULL;
1089         int ret;
1090
1091         printk(KERN_INFO SMSC_CHIPNAME " v" SMSC_DRIVER_VERSION "\n");
1092
1093         ret = usbnet_get_endpoints(dev, intf);
1094         check_warn_return(ret, "usbnet_get_endpoints failed: %d", ret);
1095
1096         dev->data[0] = (unsigned long)kzalloc(sizeof(struct smsc75xx_priv),
1097                 GFP_KERNEL);
1098
1099         pdata = (struct smsc75xx_priv *)(dev->data[0]);
1100         if (!pdata) {
1101                 netdev_warn(dev->net, "Unable to allocate smsc75xx_priv");
1102                 return -ENOMEM;
1103         }
1104
1105         pdata->dev = dev;
1106
1107         spin_lock_init(&pdata->rfe_ctl_lock);
1108         mutex_init(&pdata->dataport_mutex);
1109
1110         INIT_WORK(&pdata->set_multicast, smsc75xx_deferred_multicast_write);
1111
1112         if (DEFAULT_TX_CSUM_ENABLE) {
1113                 dev->net->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
1114                 if (DEFAULT_TSO_ENABLE)
1115                         dev->net->features |= NETIF_F_SG |
1116                                 NETIF_F_TSO | NETIF_F_TSO6;
1117         }
1118         if (DEFAULT_RX_CSUM_ENABLE)
1119                 dev->net->features |= NETIF_F_RXCSUM;
1120
1121         dev->net->hw_features = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
1122                 NETIF_F_SG | NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_RXCSUM;
1123
1124         /* Init all registers */
1125         ret = smsc75xx_reset(dev);
1126
1127         dev->net->netdev_ops = &smsc75xx_netdev_ops;
1128         dev->net->ethtool_ops = &smsc75xx_ethtool_ops;
1129         dev->net->flags |= IFF_MULTICAST;
1130         dev->net->hard_header_len += SMSC75XX_TX_OVERHEAD;
1131         dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len;
1132         return 0;
1133 }
1134
1135 static void smsc75xx_unbind(struct usbnet *dev, struct usb_interface *intf)
1136 {
1137         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1138         if (pdata) {
1139                 netif_dbg(dev, ifdown, dev->net, "free pdata");
1140                 kfree(pdata);
1141                 pdata = NULL;
1142                 dev->data[0] = 0;
1143         }
1144 }
1145
1146 static int smsc75xx_suspend(struct usb_interface *intf, pm_message_t message)
1147 {
1148         struct usbnet *dev = usb_get_intfdata(intf);
1149         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1150         int ret;
1151         u32 val;
1152
1153         ret = usbnet_suspend(intf, message);
1154         check_warn_return(ret, "usbnet_suspend error");
1155
1156         /* if no wol options set, enter lowest power SUSPEND2 mode */
1157         if (!(pdata->wolopts & SUPPORTED_WAKE)) {
1158                 netdev_info(dev->net, "entering SUSPEND2 mode");
1159
1160                 /* disable energy detect (link up) & wake up events */
1161                 ret = smsc75xx_read_reg(dev, WUCSR, &val);
1162                 check_warn_return(ret, "Error reading WUCSR");
1163
1164                 val &= ~(WUCSR_MPEN | WUCSR_WUEN);
1165
1166                 ret = smsc75xx_write_reg(dev, WUCSR, val);
1167                 check_warn_return(ret, "Error writing WUCSR");
1168
1169                 ret = smsc75xx_read_reg(dev, PMT_CTL, &val);
1170                 check_warn_return(ret, "Error reading PMT_CTL");
1171
1172                 val &= ~(PMT_CTL_ED_EN | PMT_CTL_WOL_EN);
1173
1174                 ret = smsc75xx_write_reg(dev, PMT_CTL, val);
1175                 check_warn_return(ret, "Error writing PMT_CTL");
1176
1177                 /* enter suspend2 mode */
1178                 ret = smsc75xx_read_reg(dev, PMT_CTL, &val);
1179                 check_warn_return(ret, "Error reading PMT_CTL");
1180
1181                 val &= ~(PMT_CTL_SUS_MODE | PMT_CTL_WUPS | PMT_CTL_PHY_RST);
1182                 val |= PMT_CTL_SUS_MODE_2;
1183
1184                 ret = smsc75xx_write_reg(dev, PMT_CTL, val);
1185                 check_warn_return(ret, "Error writing PMT_CTL");
1186
1187                 return 0;
1188         }
1189
1190         if (pdata->wolopts & WAKE_MAGIC) {
1191                 /* clear any pending magic packet status */
1192                 ret = smsc75xx_read_reg(dev, WUCSR, &val);
1193                 check_warn_return(ret, "Error reading WUCSR");
1194
1195                 val |= WUCSR_MPR;
1196
1197                 ret = smsc75xx_write_reg(dev, WUCSR, val);
1198                 check_warn_return(ret, "Error writing WUCSR");
1199         }
1200
1201         /* enable/disable magic packup wake */
1202         ret = smsc75xx_read_reg(dev, WUCSR, &val);
1203         check_warn_return(ret, "Error reading WUCSR");
1204
1205         if (pdata->wolopts & WAKE_MAGIC) {
1206                 netdev_info(dev->net, "enabling magic packet wakeup");
1207                 val |= WUCSR_MPEN;
1208         } else {
1209                 netdev_info(dev->net, "disabling magic packet wakeup");
1210                 val &= ~WUCSR_MPEN;
1211         }
1212
1213         ret = smsc75xx_write_reg(dev, WUCSR, val);
1214         check_warn_return(ret, "Error writing WUCSR");
1215
1216         /* enable wol wakeup source */
1217         ret = smsc75xx_read_reg(dev, PMT_CTL, &val);
1218         check_warn_return(ret, "Error reading PMT_CTL");
1219
1220         val |= PMT_CTL_WOL_EN;
1221
1222         ret = smsc75xx_write_reg(dev, PMT_CTL, val);
1223         check_warn_return(ret, "Error writing PMT_CTL");
1224
1225         /* enable receiver */
1226         ret = smsc75xx_read_reg(dev, MAC_RX, &val);
1227         check_warn_return(ret, "Failed to read MAC_RX: %d", ret);
1228
1229         val |= MAC_RX_RXEN;
1230
1231         ret = smsc75xx_write_reg(dev, MAC_RX, val);
1232         check_warn_return(ret, "Failed to write MAC_RX: %d", ret);
1233
1234         /* some wol options are enabled, so enter SUSPEND0 */
1235         netdev_info(dev->net, "entering SUSPEND0 mode");
1236
1237         ret = smsc75xx_read_reg(dev, PMT_CTL, &val);
1238         check_warn_return(ret, "Error reading PMT_CTL");
1239
1240         val &= (~(PMT_CTL_SUS_MODE | PMT_CTL_WUPS | PMT_CTL_PHY_RST));
1241         val |= PMT_CTL_SUS_MODE_0;
1242
1243         ret = smsc75xx_write_reg(dev, PMT_CTL, val);
1244         check_warn_return(ret, "Error writing PMT_CTL");
1245
1246         /* clear wol status */
1247         val &= ~PMT_CTL_WUPS;
1248         val |= PMT_CTL_WUPS_WOL;
1249         ret = smsc75xx_write_reg(dev, PMT_CTL, val);
1250         check_warn_return(ret, "Error writing PMT_CTL");
1251
1252         /* read back PMT_CTL */
1253         ret = smsc75xx_read_reg(dev, PMT_CTL, &val);
1254         check_warn_return(ret, "Error reading PMT_CTL");
1255
1256         smsc75xx_set_feature(dev, USB_DEVICE_REMOTE_WAKEUP);
1257
1258         return 0;
1259 }
1260
1261 static int smsc75xx_resume(struct usb_interface *intf)
1262 {
1263         struct usbnet *dev = usb_get_intfdata(intf);
1264         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1265         int ret;
1266         u32 val;
1267
1268         if (pdata->wolopts & WAKE_MAGIC) {
1269                 netdev_info(dev->net, "resuming from SUSPEND0");
1270
1271                 smsc75xx_clear_feature(dev, USB_DEVICE_REMOTE_WAKEUP);
1272
1273                 /* Disable magic packup wake */
1274                 ret = smsc75xx_read_reg(dev, WUCSR, &val);
1275                 check_warn_return(ret, "Error reading WUCSR");
1276
1277                 val &= ~WUCSR_MPEN;
1278
1279                 ret = smsc75xx_write_reg(dev, WUCSR, val);
1280                 check_warn_return(ret, "Error writing WUCSR");
1281
1282                 /* clear wake-up status */
1283                 ret = smsc75xx_read_reg(dev, PMT_CTL, &val);
1284                 check_warn_return(ret, "Error reading PMT_CTL");
1285
1286                 val &= ~PMT_CTL_WOL_EN;
1287                 val |= PMT_CTL_WUPS;
1288
1289                 ret = smsc75xx_write_reg(dev, PMT_CTL, val);
1290                 check_warn_return(ret, "Error writing PMT_CTL");
1291         } else {
1292                 netdev_info(dev->net, "resuming from SUSPEND2");
1293
1294                 ret = smsc75xx_read_reg(dev, PMT_CTL, &val);
1295                 check_warn_return(ret, "Error reading PMT_CTL");
1296
1297                 val |= PMT_CTL_PHY_PWRUP;
1298
1299                 ret = smsc75xx_write_reg(dev, PMT_CTL, val);
1300                 check_warn_return(ret, "Error writing PMT_CTL");
1301         }
1302
1303         ret = smsc75xx_wait_ready(dev);
1304         check_warn_return(ret, "device not ready in smsc75xx_resume");
1305
1306         return usbnet_resume(intf);
1307 }
1308
1309 static void smsc75xx_rx_csum_offload(struct usbnet *dev, struct sk_buff *skb,
1310                                      u32 rx_cmd_a, u32 rx_cmd_b)
1311 {
1312         if (!(dev->net->features & NETIF_F_RXCSUM) ||
1313             unlikely(rx_cmd_a & RX_CMD_A_LCSM)) {
1314                 skb->ip_summed = CHECKSUM_NONE;
1315         } else {
1316                 skb->csum = ntohs((u16)(rx_cmd_b >> RX_CMD_B_CSUM_SHIFT));
1317                 skb->ip_summed = CHECKSUM_COMPLETE;
1318         }
1319 }
1320
1321 static int smsc75xx_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
1322 {
1323         while (skb->len > 0) {
1324                 u32 rx_cmd_a, rx_cmd_b, align_count, size;
1325                 struct sk_buff *ax_skb;
1326                 unsigned char *packet;
1327
1328                 memcpy(&rx_cmd_a, skb->data, sizeof(rx_cmd_a));
1329                 le32_to_cpus(&rx_cmd_a);
1330                 skb_pull(skb, 4);
1331
1332                 memcpy(&rx_cmd_b, skb->data, sizeof(rx_cmd_b));
1333                 le32_to_cpus(&rx_cmd_b);
1334                 skb_pull(skb, 4 + RXW_PADDING);
1335
1336                 packet = skb->data;
1337
1338                 /* get the packet length */
1339                 size = (rx_cmd_a & RX_CMD_A_LEN) - RXW_PADDING;
1340                 align_count = (4 - ((size + RXW_PADDING) % 4)) % 4;
1341
1342                 if (unlikely(rx_cmd_a & RX_CMD_A_RED)) {
1343                         netif_dbg(dev, rx_err, dev->net,
1344                                 "Error rx_cmd_a=0x%08x", rx_cmd_a);
1345                         dev->net->stats.rx_errors++;
1346                         dev->net->stats.rx_dropped++;
1347
1348                         if (rx_cmd_a & RX_CMD_A_FCS)
1349                                 dev->net->stats.rx_crc_errors++;
1350                         else if (rx_cmd_a & (RX_CMD_A_LONG | RX_CMD_A_RUNT))
1351                                 dev->net->stats.rx_frame_errors++;
1352                 } else {
1353                         /* ETH_FRAME_LEN + 4(CRC) + 2(COE) + 4(Vlan) */
1354                         if (unlikely(size > (ETH_FRAME_LEN + 12))) {
1355                                 netif_dbg(dev, rx_err, dev->net,
1356                                         "size err rx_cmd_a=0x%08x", rx_cmd_a);
1357                                 return 0;
1358                         }
1359
1360                         /* last frame in this batch */
1361                         if (skb->len == size) {
1362                                 smsc75xx_rx_csum_offload(dev, skb, rx_cmd_a,
1363                                         rx_cmd_b);
1364
1365                                 skb_trim(skb, skb->len - 4); /* remove fcs */
1366                                 skb->truesize = size + sizeof(struct sk_buff);
1367
1368                                 return 1;
1369                         }
1370
1371                         ax_skb = skb_clone(skb, GFP_ATOMIC);
1372                         if (unlikely(!ax_skb)) {
1373                                 netdev_warn(dev->net, "Error allocating skb");
1374                                 return 0;
1375                         }
1376
1377                         ax_skb->len = size;
1378                         ax_skb->data = packet;
1379                         skb_set_tail_pointer(ax_skb, size);
1380
1381                         smsc75xx_rx_csum_offload(dev, ax_skb, rx_cmd_a,
1382                                 rx_cmd_b);
1383
1384                         skb_trim(ax_skb, ax_skb->len - 4); /* remove fcs */
1385                         ax_skb->truesize = size + sizeof(struct sk_buff);
1386
1387                         usbnet_skb_return(dev, ax_skb);
1388                 }
1389
1390                 skb_pull(skb, size);
1391
1392                 /* padding bytes before the next frame starts */
1393                 if (skb->len)
1394                         skb_pull(skb, align_count);
1395         }
1396
1397         if (unlikely(skb->len < 0)) {
1398                 netdev_warn(dev->net, "invalid rx length<0 %d", skb->len);
1399                 return 0;
1400         }
1401
1402         return 1;
1403 }
1404
1405 static struct sk_buff *smsc75xx_tx_fixup(struct usbnet *dev,
1406                                          struct sk_buff *skb, gfp_t flags)
1407 {
1408         u32 tx_cmd_a, tx_cmd_b;
1409
1410         skb_linearize(skb);
1411
1412         if (skb_headroom(skb) < SMSC75XX_TX_OVERHEAD) {
1413                 struct sk_buff *skb2 =
1414                         skb_copy_expand(skb, SMSC75XX_TX_OVERHEAD, 0, flags);
1415                 dev_kfree_skb_any(skb);
1416                 skb = skb2;
1417                 if (!skb)
1418                         return NULL;
1419         }
1420
1421         tx_cmd_a = (u32)(skb->len & TX_CMD_A_LEN) | TX_CMD_A_FCS;
1422
1423         if (skb->ip_summed == CHECKSUM_PARTIAL)
1424                 tx_cmd_a |= TX_CMD_A_IPE | TX_CMD_A_TPE;
1425
1426         if (skb_is_gso(skb)) {
1427                 u16 mss = max(skb_shinfo(skb)->gso_size, TX_MSS_MIN);
1428                 tx_cmd_b = (mss << TX_CMD_B_MSS_SHIFT) & TX_CMD_B_MSS;
1429
1430                 tx_cmd_a |= TX_CMD_A_LSO;
1431         } else {
1432                 tx_cmd_b = 0;
1433         }
1434
1435         skb_push(skb, 4);
1436         cpu_to_le32s(&tx_cmd_b);
1437         memcpy(skb->data, &tx_cmd_b, 4);
1438
1439         skb_push(skb, 4);
1440         cpu_to_le32s(&tx_cmd_a);
1441         memcpy(skb->data, &tx_cmd_a, 4);
1442
1443         return skb;
1444 }
1445
1446 static const struct driver_info smsc75xx_info = {
1447         .description    = "smsc75xx USB 2.0 Gigabit Ethernet",
1448         .bind           = smsc75xx_bind,
1449         .unbind         = smsc75xx_unbind,
1450         .link_reset     = smsc75xx_link_reset,
1451         .reset          = smsc75xx_reset,
1452         .rx_fixup       = smsc75xx_rx_fixup,
1453         .tx_fixup       = smsc75xx_tx_fixup,
1454         .status         = smsc75xx_status,
1455         .flags          = FLAG_ETHER | FLAG_SEND_ZLP | FLAG_LINK_INTR,
1456 };
1457
1458 static const struct usb_device_id products[] = {
1459         {
1460                 /* SMSC7500 USB Gigabit Ethernet Device */
1461                 USB_DEVICE(USB_VENDOR_ID_SMSC, USB_PRODUCT_ID_LAN7500),
1462                 .driver_info = (unsigned long) &smsc75xx_info,
1463         },
1464         {
1465                 /* SMSC7500 USB Gigabit Ethernet Device */
1466                 USB_DEVICE(USB_VENDOR_ID_SMSC, USB_PRODUCT_ID_LAN7505),
1467                 .driver_info = (unsigned long) &smsc75xx_info,
1468         },
1469         { },            /* END */
1470 };
1471 MODULE_DEVICE_TABLE(usb, products);
1472
1473 static struct usb_driver smsc75xx_driver = {
1474         .name           = SMSC_CHIPNAME,
1475         .id_table       = products,
1476         .probe          = usbnet_probe,
1477         .suspend        = smsc75xx_suspend,
1478         .resume         = smsc75xx_resume,
1479         .reset_resume   = smsc75xx_resume,
1480         .disconnect     = usbnet_disconnect,
1481         .disable_hub_initiated_lpm = 1,
1482 };
1483
1484 module_usb_driver(smsc75xx_driver);
1485
1486 MODULE_AUTHOR("Nancy Lin");
1487 MODULE_AUTHOR("Steve Glendinning <steve.glendinning@shawell.net>");
1488 MODULE_DESCRIPTION("SMSC75XX USB 2.0 Gigabit Ethernet Devices");
1489 MODULE_LICENSE("GPL");