drivers/net/usb/smsc95xx.c

   1  /***************************************************************************
   2  *
   3  * Copyright (C) 2007-2008 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 "smsc95xx.h"
  33
  34 #define SMSC_CHIPNAME                   "smsc95xx"
  35 #define SMSC_DRIVER_VERSION             "1.0.4"
  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          (2048)
  42 #define LAN95XX_EEPROM_MAGIC            (0x9500)
  43 #define EEPROM_MAC_OFFSET               (0x01)
  44 #define DEFAULT_TX_CSUM_ENABLE          (true)
  45 #define DEFAULT_RX_CSUM_ENABLE          (true)
  46 #define SMSC95XX_INTERNAL_PHY_ID        (1)
  47 #define SMSC95XX_TX_OVERHEAD            (8)
  48 #define SMSC95XX_TX_OVERHEAD_CSUM       (12)
  49 #define SUPPORTED_WAKE                  (WAKE_MAGIC)
  50
  51 #define check_warn(ret, fmt, args...) \
  52         ({ if (ret < 0) netdev_warn(dev->net, fmt, ##args); })
  53
  54 #define check_warn_return(ret, fmt, args...) \
  55         ({ if (ret < 0) { netdev_warn(dev->net, fmt, ##args); return ret; } })
  56
  57 #define check_warn_goto_done(ret, fmt, args...) \
  58         ({ if (ret < 0) { netdev_warn(dev->net, fmt, ##args); goto done; } })
  59
  60 struct smsc95xx_priv {
  61         u32 mac_cr;
  62         u32 hash_hi;
  63         u32 hash_lo;
  64         u32 wolopts;
  65         spinlock_t mac_cr_lock;
  66 };
  67
  68 struct usb_context {
  69         struct usb_ctrlrequest req;
  70         struct usbnet *dev;
  71 };
  72
  73 static bool turbo_mode = true;
  74 module_param(turbo_mode, bool, 0644);
  75 MODULE_PARM_DESC(turbo_mode, "Enable multiple frames per Rx transaction");
  76
  77 static int __must_check smsc95xx_read_reg(struct usbnet *dev, u32 index,
  78                                           u32 *data)
  79 {
  80         u32 *buf = kmalloc(4, GFP_KERNEL);
  81         int ret;
  82
  83         BUG_ON(!dev);
  84
  85         if (!buf)
  86                 return -ENOMEM;
  87
  88         ret = usb_control_msg(dev->udev, usb_rcvctrlpipe(dev->udev, 0),
  89                 USB_VENDOR_REQUEST_READ_REGISTER,
  90                 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
  91                 00, index, buf, 4, USB_CTRL_GET_TIMEOUT);
  92
  93         if (unlikely(ret < 0))
  94                 netdev_warn(dev->net, "Failed to read register index 0x%08x\n", index);
  95
  96         le32_to_cpus(buf);
  97         *data = *buf;
  98         kfree(buf);
  99
 100         return ret;
 101 }
 102
 103 static int __must_check smsc95xx_write_reg(struct usbnet *dev, u32 index,
 104                                            u32 data)
 105 {
 106         u32 *buf = kmalloc(4, GFP_KERNEL);
 107         int ret;
 108
 109         BUG_ON(!dev);
 110
 111         if (!buf)
 112                 return -ENOMEM;
 113
 114         *buf = data;
 115         cpu_to_le32s(buf);
 116
 117         ret = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0),
 118                 USB_VENDOR_REQUEST_WRITE_REGISTER,
 119                 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 120                 00, index, buf, 4, USB_CTRL_SET_TIMEOUT);
 121
 122         if (unlikely(ret < 0))
 123                 netdev_warn(dev->net, "Failed to write register index 0x%08x\n", index);
 124
 125         kfree(buf);
 126
 127         return ret;
 128 }
 129
 130 static int smsc95xx_set_feature(struct usbnet *dev, u32 feature)
 131 {
 132         if (WARN_ON_ONCE(!dev))
 133                 return -EINVAL;
 134
 135         cpu_to_le32s(&feature);
 136
 137         return usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0),
 138                 USB_REQ_SET_FEATURE, USB_RECIP_DEVICE, feature, 0, NULL, 0,
 139                 USB_CTRL_SET_TIMEOUT);
 140 }
 141
 142 static int smsc95xx_clear_feature(struct usbnet *dev, u32 feature)
 143 {
 144         if (WARN_ON_ONCE(!dev))
 145                 return -EINVAL;
 146
 147         cpu_to_le32s(&feature);
 148
 149         return usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0),
 150                 USB_REQ_CLEAR_FEATURE, USB_RECIP_DEVICE, feature, 0, NULL, 0,
 151                 USB_CTRL_SET_TIMEOUT);
 152 }
 153
 154 /* Loop until the read is completed with timeout
 155  * called with phy_mutex held */
 156 static int __must_check smsc95xx_phy_wait_not_busy(struct usbnet *dev)
 157 {
 158         unsigned long start_time = jiffies;
 159         u32 val;
 160         int ret;
 161
 162         do {
 163                 ret = smsc95xx_read_reg(dev, MII_ADDR, &val);
 164                 check_warn_return(ret, "Error reading MII_ACCESS");
 165                 if (!(val & MII_BUSY_))
 166                         return 0;
 167         } while (!time_after(jiffies, start_time + HZ));
 168
 169         return -EIO;
 170 }
 171
 172 static int smsc95xx_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 = smsc95xx_phy_wait_not_busy(dev);
 182         check_warn_goto_done(ret, "MII is busy in smsc95xx_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 << 11) | (idx << 6) | MII_READ_;
 188         ret = smsc95xx_write_reg(dev, MII_ADDR, addr);
 189         check_warn_goto_done(ret, "Error writing MII_ADDR");
 190
 191         ret = smsc95xx_phy_wait_not_busy(dev);
 192         check_warn_goto_done(ret, "Timed out reading MII reg %02X", idx);
 193
 194         ret = smsc95xx_read_reg(dev, MII_DATA, &val);
 195         check_warn_goto_done(ret, "Error reading MII_DATA");
 196
 197         ret = (u16)(val & 0xFFFF);
 198
 199 done:
 200         mutex_unlock(&dev->phy_mutex);
 201         return ret;
 202 }
 203
 204 static void smsc95xx_mdio_write(struct net_device *netdev, int phy_id, int idx,
 205                                 int regval)
 206 {
 207         struct usbnet *dev = netdev_priv(netdev);
 208         u32 val, addr;
 209         int ret;
 210
 211         mutex_lock(&dev->phy_mutex);
 212
 213         /* confirm MII not busy */
 214         ret = smsc95xx_phy_wait_not_busy(dev);
 215         check_warn_goto_done(ret, "MII is busy in smsc95xx_mdio_write");
 216
 217         val = regval;
 218         ret = smsc95xx_write_reg(dev, MII_DATA, val);
 219         check_warn_goto_done(ret, "Error writing MII_DATA");
 220
 221         /* set the address, index & direction (write to PHY) */
 222         phy_id &= dev->mii.phy_id_mask;
 223         idx &= dev->mii.reg_num_mask;
 224         addr = (phy_id << 11) | (idx << 6) | MII_WRITE_;
 225         ret = smsc95xx_write_reg(dev, MII_ADDR, addr);
 226         check_warn_goto_done(ret, "Error writing MII_ADDR");
 227
 228         ret = smsc95xx_phy_wait_not_busy(dev);
 229         check_warn_goto_done(ret, "Timed out writing MII reg %02X", idx);
 230
 231 done:
 232         mutex_unlock(&dev->phy_mutex);
 233 }
 234
 235 static int __must_check smsc95xx_wait_eeprom(struct usbnet *dev)
 236 {
 237         unsigned long start_time = jiffies;
 238         u32 val;
 239         int ret;
 240
 241         do {
 242                 ret = smsc95xx_read_reg(dev, E2P_CMD, &val);
 243                 check_warn_return(ret, "Error reading E2P_CMD");
 244                 if (!(val & E2P_CMD_BUSY_) || (val & E2P_CMD_TIMEOUT_))
 245                         break;
 246                 udelay(40);
 247         } while (!time_after(jiffies, start_time + HZ));
 248
 249         if (val & (E2P_CMD_TIMEOUT_ | E2P_CMD_BUSY_)) {
 250                 netdev_warn(dev->net, "EEPROM read operation timeout\n");
 251                 return -EIO;
 252         }
 253
 254         return 0;
 255 }
 256
 257 static int __must_check smsc95xx_eeprom_confirm_not_busy(struct usbnet *dev)
 258 {
 259         unsigned long start_time = jiffies;
 260         u32 val;
 261         int ret;
 262
 263         do {
 264                 ret = smsc95xx_read_reg(dev, E2P_CMD, &val);
 265                 check_warn_return(ret, "Error reading E2P_CMD");
 266
 267                 if (!(val & E2P_CMD_BUSY_))
 268                         return 0;
 269
 270                 udelay(40);
 271         } while (!time_after(jiffies, start_time + HZ));
 272
 273         netdev_warn(dev->net, "EEPROM is busy\n");
 274         return -EIO;
 275 }
 276
 277 static int smsc95xx_read_eeprom(struct usbnet *dev, u32 offset, u32 length,
 278                                 u8 *data)
 279 {
 280         u32 val;
 281         int i, ret;
 282
 283         BUG_ON(!dev);
 284         BUG_ON(!data);
 285
 286         ret = smsc95xx_eeprom_confirm_not_busy(dev);
 287         if (ret)
 288                 return ret;
 289
 290         for (i = 0; i < length; i++) {
 291                 val = E2P_CMD_BUSY_ | E2P_CMD_READ_ | (offset & E2P_CMD_ADDR_);
 292                 ret = smsc95xx_write_reg(dev, E2P_CMD, val);
 293                 check_warn_return(ret, "Error writing E2P_CMD");
 294
 295                 ret = smsc95xx_wait_eeprom(dev);
 296                 if (ret < 0)
 297                         return ret;
 298
 299                 ret = smsc95xx_read_reg(dev, E2P_DATA, &val);
 300                 check_warn_return(ret, "Error reading E2P_DATA");
 301
 302                 data[i] = val & 0xFF;
 303                 offset++;
 304         }
 305
 306         return 0;
 307 }
 308
 309 static int smsc95xx_write_eeprom(struct usbnet *dev, u32 offset, u32 length,
 310                                  u8 *data)
 311 {
 312         u32 val;
 313         int i, ret;
 314
 315         BUG_ON(!dev);
 316         BUG_ON(!data);
 317
 318         ret = smsc95xx_eeprom_confirm_not_busy(dev);
 319         if (ret)
 320                 return ret;
 321
 322         /* Issue write/erase enable command */
 323         val = E2P_CMD_BUSY_ | E2P_CMD_EWEN_;
 324         ret = smsc95xx_write_reg(dev, E2P_CMD, val);
 325         check_warn_return(ret, "Error writing E2P_DATA");
 326
 327         ret = smsc95xx_wait_eeprom(dev);
 328         if (ret < 0)
 329                 return ret;
 330
 331         for (i = 0; i < length; i++) {
 332
 333                 /* Fill data register */
 334                 val = data[i];
 335                 ret = smsc95xx_write_reg(dev, E2P_DATA, val);
 336                 check_warn_return(ret, "Error writing E2P_DATA");
 337
 338                 /* Send "write" command */
 339                 val = E2P_CMD_BUSY_ | E2P_CMD_WRITE_ | (offset & E2P_CMD_ADDR_);
 340                 ret = smsc95xx_write_reg(dev, E2P_CMD, val);
 341                 check_warn_return(ret, "Error writing E2P_CMD");
 342
 343                 ret = smsc95xx_wait_eeprom(dev);
 344                 if (ret < 0)
 345                         return ret;
 346
 347                 offset++;
 348         }
 349
 350         return 0;
 351 }
 352
 353 static void smsc95xx_async_cmd_callback(struct urb *urb)
 354 {
 355         struct usb_context *usb_context = urb->context;
 356         struct usbnet *dev = usb_context->dev;
 357         int status = urb->status;
 358
 359         check_warn(status, "async callback failed with %d\n", status);
 360
 361         kfree(usb_context);
 362         usb_free_urb(urb);
 363 }
 364
 365 static int __must_check smsc95xx_write_reg_async(struct usbnet *dev, u16 index,
 366                                                  u32 *data)
 367 {
 368         struct usb_context *usb_context;
 369         int status;
 370         struct urb *urb;
 371         const u16 size = 4;
 372
 373         urb = usb_alloc_urb(0, GFP_ATOMIC);
 374         if (!urb) {
 375                 netdev_warn(dev->net, "Error allocating URB\n");
 376                 return -ENOMEM;
 377         }
 378
 379         usb_context = kmalloc(sizeof(struct usb_context), GFP_ATOMIC);
 380         if (usb_context == NULL) {
 381                 netdev_warn(dev->net, "Error allocating control msg\n");
 382                 usb_free_urb(urb);
 383                 return -ENOMEM;
 384         }
 385
 386         usb_context->req.bRequestType =
 387                 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE;
 388         usb_context->req.bRequest = USB_VENDOR_REQUEST_WRITE_REGISTER;
 389         usb_context->req.wValue = 00;
 390         usb_context->req.wIndex = cpu_to_le16(index);
 391         usb_context->req.wLength = cpu_to_le16(size);
 392
 393         usb_fill_control_urb(urb, dev->udev, usb_sndctrlpipe(dev->udev, 0),
 394                 (void *)&usb_context->req, data, size,
 395                 smsc95xx_async_cmd_callback,
 396                 (void *)usb_context);
 397
 398         status = usb_submit_urb(urb, GFP_ATOMIC);
 399         if (status < 0) {
 400                 netdev_warn(dev->net, "Error submitting control msg, sts=%d\n",
 401                             status);
 402                 kfree(usb_context);
 403                 usb_free_urb(urb);
 404         }
 405
 406         return status;
 407 }
 408
 409 /* returns hash bit number for given MAC address
 410  * example:
 411  * 01 00 5E 00 00 01 -> returns bit number 31 */
 412 static unsigned int smsc95xx_hash(char addr[ETH_ALEN])
 413 {
 414         return (ether_crc(ETH_ALEN, addr) >> 26) & 0x3f;
 415 }
 416
 417 static void smsc95xx_set_multicast(struct net_device *netdev)
 418 {
 419         struct usbnet *dev = netdev_priv(netdev);
 420         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
 421         unsigned long flags;
 422         int ret;
 423
 424         pdata->hash_hi = 0;
 425         pdata->hash_lo = 0;
 426
 427         spin_lock_irqsave(&pdata->mac_cr_lock, flags);
 428
 429         if (dev->net->flags & IFF_PROMISC) {
 430                 netif_dbg(dev, drv, dev->net, "promiscuous mode enabled\n");
 431                 pdata->mac_cr |= MAC_CR_PRMS_;
 432                 pdata->mac_cr &= ~(MAC_CR_MCPAS_ | MAC_CR_HPFILT_);
 433         } else if (dev->net->flags & IFF_ALLMULTI) {
 434                 netif_dbg(dev, drv, dev->net, "receive all multicast enabled\n");
 435                 pdata->mac_cr |= MAC_CR_MCPAS_;
 436                 pdata->mac_cr &= ~(MAC_CR_PRMS_ | MAC_CR_HPFILT_);
 437         } else if (!netdev_mc_empty(dev->net)) {
 438                 struct netdev_hw_addr *ha;
 439
 440                 pdata->mac_cr |= MAC_CR_HPFILT_;
 441                 pdata->mac_cr &= ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_);
 442
 443                 netdev_for_each_mc_addr(ha, netdev) {
 444                         u32 bitnum = smsc95xx_hash(ha->addr);
 445                         u32 mask = 0x01 << (bitnum & 0x1F);
 446                         if (bitnum & 0x20)
 447                                 pdata->hash_hi |= mask;
 448                         else
 449                                 pdata->hash_lo |= mask;
 450                 }
 451
 452                 netif_dbg(dev, drv, dev->net, "HASHH=0x%08X, HASHL=0x%08X\n",
 453                                    pdata->hash_hi, pdata->hash_lo);
 454         } else {
 455                 netif_dbg(dev, drv, dev->net, "receive own packets only\n");
 456                 pdata->mac_cr &=
 457                         ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_ | MAC_CR_HPFILT_);
 458         }
 459
 460         spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
 461
 462         /* Initiate async writes, as we can't wait for completion here */
 463         ret = smsc95xx_write_reg_async(dev, HASHH, &pdata->hash_hi);
 464         check_warn(ret, "failed to initiate async write to HASHH");
 465
 466         ret = smsc95xx_write_reg_async(dev, HASHL, &pdata->hash_lo);
 467         check_warn(ret, "failed to initiate async write to HASHL");
 468
 469         ret = smsc95xx_write_reg_async(dev, MAC_CR, &pdata->mac_cr);
 470         check_warn(ret, "failed to initiate async write to MAC_CR");
 471 }
 472
 473 static int smsc95xx_phy_update_flowcontrol(struct usbnet *dev, u8 duplex,
 474                                            u16 lcladv, u16 rmtadv)
 475 {
 476         u32 flow, afc_cfg = 0;
 477
 478         int ret = smsc95xx_read_reg(dev, AFC_CFG, &afc_cfg);
 479         check_warn_return(ret, "Error reading AFC_CFG");
 480
 481         if (duplex == DUPLEX_FULL) {
 482                 u8 cap = mii_resolve_flowctrl_fdx(lcladv, rmtadv);
 483
 484                 if (cap & FLOW_CTRL_RX)
 485                         flow = 0xFFFF0002;
 486                 else
 487                         flow = 0;
 488
 489                 if (cap & FLOW_CTRL_TX)
 490                         afc_cfg |= 0xF;
 491                 else
 492                         afc_cfg &= ~0xF;
 493
 494                 netif_dbg(dev, link, dev->net, "rx pause %s, tx pause %s\n",
 495                                    cap & FLOW_CTRL_RX ? "enabled" : "disabled",
 496                                    cap & FLOW_CTRL_TX ? "enabled" : "disabled");
 497         } else {
 498                 netif_dbg(dev, link, dev->net, "half duplex\n");
 499                 flow = 0;
 500                 afc_cfg |= 0xF;
 501         }
 502
 503         ret = smsc95xx_write_reg(dev, FLOW, flow);
 504         check_warn_return(ret, "Error writing FLOW");
 505
 506         ret = smsc95xx_write_reg(dev, AFC_CFG, afc_cfg);
 507         check_warn_return(ret, "Error writing AFC_CFG");
 508
 509         return 0;
 510 }
 511
 512 static int smsc95xx_link_reset(struct usbnet *dev)
 513 {
 514         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
 515         struct mii_if_info *mii = &dev->mii;
 516         struct ethtool_cmd ecmd = { .cmd = ETHTOOL_GSET };
 517         unsigned long flags;
 518         u16 lcladv, rmtadv;
 519         int ret;
 520
 521         /* clear interrupt status */
 522         ret = smsc95xx_mdio_read(dev->net, mii->phy_id, PHY_INT_SRC);
 523         check_warn_return(ret, "Error reading PHY_INT_SRC");
 524
 525         ret = smsc95xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL_);
 526         check_warn_return(ret, "Error writing INT_STS");
 527
 528         mii_check_media(mii, 1, 1);
 529         mii_ethtool_gset(&dev->mii, &ecmd);
 530         lcladv = smsc95xx_mdio_read(dev->net, mii->phy_id, MII_ADVERTISE);
 531         rmtadv = smsc95xx_mdio_read(dev->net, mii->phy_id, MII_LPA);
 532
 533         netif_dbg(dev, link, dev->net,
 534                   "speed: %u duplex: %d lcladv: %04x rmtadv: %04x\n",
 535                   ethtool_cmd_speed(&ecmd), ecmd.duplex, lcladv, rmtadv);
 536
 537         spin_lock_irqsave(&pdata->mac_cr_lock, flags);
 538         if (ecmd.duplex != DUPLEX_FULL) {
 539                 pdata->mac_cr &= ~MAC_CR_FDPX_;
 540                 pdata->mac_cr |= MAC_CR_RCVOWN_;
 541         } else {
 542                 pdata->mac_cr &= ~MAC_CR_RCVOWN_;
 543                 pdata->mac_cr |= MAC_CR_FDPX_;
 544         }
 545         spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
 546
 547         ret = smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr);
 548         check_warn_return(ret, "Error writing MAC_CR");
 549
 550         ret = smsc95xx_phy_update_flowcontrol(dev, ecmd.duplex, lcladv, rmtadv);
 551         check_warn_return(ret, "Error updating PHY flow control");
 552
 553         return 0;
 554 }
 555
 556 static void smsc95xx_status(struct usbnet *dev, struct urb *urb)
 557 {
 558         u32 intdata;
 559
 560         if (urb->actual_length != 4) {
 561                 netdev_warn(dev->net, "unexpected urb length %d\n",
 562                             urb->actual_length);
 563                 return;
 564         }
 565
 566         memcpy(&intdata, urb->transfer_buffer, 4);
 567         le32_to_cpus(&intdata);
 568
 569         netif_dbg(dev, link, dev->net, "intdata: 0x%08X\n", intdata);
 570
 571         if (intdata & INT_ENP_PHY_INT_)
 572                 usbnet_defer_kevent(dev, EVENT_LINK_RESET);
 573         else
 574                 netdev_warn(dev->net, "unexpected interrupt, intdata=0x%08X\n",
 575                             intdata);
 576 }
 577
 578 /* Enable or disable Tx & Rx checksum offload engines */
 579 static int smsc95xx_set_features(struct net_device *netdev,
 580         netdev_features_t features)
 581 {
 582         struct usbnet *dev = netdev_priv(netdev);
 583         u32 read_buf;
 584         int ret;
 585
 586         ret = smsc95xx_read_reg(dev, COE_CR, &read_buf);
 587         check_warn_return(ret, "Failed to read COE_CR: %d\n", ret);
 588
 589         if (features & NETIF_F_HW_CSUM)
 590                 read_buf |= Tx_COE_EN_;
 591         else
 592                 read_buf &= ~Tx_COE_EN_;
 593
 594         if (features & NETIF_F_RXCSUM)
 595                 read_buf |= Rx_COE_EN_;
 596         else
 597                 read_buf &= ~Rx_COE_EN_;
 598
 599         ret = smsc95xx_write_reg(dev, COE_CR, read_buf);
 600         check_warn_return(ret, "Failed to write COE_CR: %d\n", ret);
 601
 602         netif_dbg(dev, hw, dev->net, "COE_CR = 0x%08x\n", read_buf);
 603         return 0;
 604 }
 605
 606 static int smsc95xx_ethtool_get_eeprom_len(struct net_device *net)
 607 {
 608         return MAX_EEPROM_SIZE;
 609 }
 610
 611 static int smsc95xx_ethtool_get_eeprom(struct net_device *netdev,
 612                                        struct ethtool_eeprom *ee, u8 *data)
 613 {
 614         struct usbnet *dev = netdev_priv(netdev);
 615
 616         ee->magic = LAN95XX_EEPROM_MAGIC;
 617
 618         return smsc95xx_read_eeprom(dev, ee->offset, ee->len, data);
 619 }
 620
 621 static int smsc95xx_ethtool_set_eeprom(struct net_device *netdev,
 622                                        struct ethtool_eeprom *ee, u8 *data)
 623 {
 624         struct usbnet *dev = netdev_priv(netdev);
 625
 626         if (ee->magic != LAN95XX_EEPROM_MAGIC) {
 627                 netdev_warn(dev->net, "EEPROM: magic value mismatch, magic = 0x%x\n",
 628                             ee->magic);
 629                 return -EINVAL;
 630         }
 631
 632         return smsc95xx_write_eeprom(dev, ee->offset, ee->len, data);
 633 }
 634
 635 static int smsc95xx_ethtool_getregslen(struct net_device *netdev)
 636 {
 637         /* all smsc95xx registers */
 638         return COE_CR - ID_REV + 1;
 639 }
 640
 641 static void
 642 smsc95xx_ethtool_getregs(struct net_device *netdev, struct ethtool_regs *regs,
 643                          void *buf)
 644 {
 645         struct usbnet *dev = netdev_priv(netdev);
 646         unsigned int i, j;
 647         int retval;
 648         u32 *data = buf;
 649
 650         retval = smsc95xx_read_reg(dev, ID_REV, &regs->version);
 651         if (retval < 0) {
 652                 netdev_warn(netdev, "REGS: cannot read ID_REV\n");
 653                 return;
 654         }
 655
 656         for (i = ID_REV, j = 0; i <= COE_CR; i += (sizeof(u32)), j++) {
 657                 retval = smsc95xx_read_reg(dev, i, &data[j]);
 658                 if (retval < 0) {
 659                         netdev_warn(netdev, "REGS: cannot read reg[%x]\n", i);
 660                         return;
 661                 }
 662         }
 663 }
 664
 665 static void smsc95xx_ethtool_get_wol(struct net_device *net,
 666                                      struct ethtool_wolinfo *wolinfo)
 667 {
 668         struct usbnet *dev = netdev_priv(net);
 669         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
 670
 671         wolinfo->supported = SUPPORTED_WAKE;
 672         wolinfo->wolopts = pdata->wolopts;
 673 }
 674
 675 static int smsc95xx_ethtool_set_wol(struct net_device *net,
 676                                     struct ethtool_wolinfo *wolinfo)
 677 {
 678         struct usbnet *dev = netdev_priv(net);
 679         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
 680
 681         pdata->wolopts = wolinfo->wolopts & SUPPORTED_WAKE;
 682         return 0;
 683 }
 684
 685 static const struct ethtool_ops smsc95xx_ethtool_ops = {
 686         .get_link       = usbnet_get_link,
 687         .nway_reset     = usbnet_nway_reset,
 688         .get_drvinfo    = usbnet_get_drvinfo,
 689         .get_msglevel   = usbnet_get_msglevel,
 690         .set_msglevel   = usbnet_set_msglevel,
 691         .get_settings   = usbnet_get_settings,
 692         .set_settings   = usbnet_set_settings,
 693         .get_eeprom_len = smsc95xx_ethtool_get_eeprom_len,
 694         .get_eeprom     = smsc95xx_ethtool_get_eeprom,
 695         .set_eeprom     = smsc95xx_ethtool_set_eeprom,
 696         .get_regs_len   = smsc95xx_ethtool_getregslen,
 697         .get_regs       = smsc95xx_ethtool_getregs,
 698         .get_wol        = smsc95xx_ethtool_get_wol,
 699         .set_wol        = smsc95xx_ethtool_set_wol,
 700 };
 701
 702 static int smsc95xx_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
 703 {
 704         struct usbnet *dev = netdev_priv(netdev);
 705
 706         if (!netif_running(netdev))
 707                 return -EINVAL;
 708
 709         return generic_mii_ioctl(&dev->mii, if_mii(rq), cmd, NULL);
 710 }
 711
 712 static void smsc95xx_init_mac_address(struct usbnet *dev)
 713 {
 714         /* try reading mac address from EEPROM */
 715         if (smsc95xx_read_eeprom(dev, EEPROM_MAC_OFFSET, ETH_ALEN,
 716                         dev->net->dev_addr) == 0) {
 717                 if (is_valid_ether_addr(dev->net->dev_addr)) {
 718                         /* eeprom values are valid so use them */
 719                         netif_dbg(dev, ifup, dev->net, "MAC address read from EEPROM\n");
 720                         return;
 721                 }
 722         }
 723
 724         /* no eeprom, or eeprom values are invalid. generate random MAC */
 725         eth_hw_addr_random(dev->net);
 726         netif_dbg(dev, ifup, dev->net, "MAC address set to eth_random_addr\n");
 727 }
 728
 729 static int smsc95xx_set_mac_address(struct usbnet *dev)
 730 {
 731         u32 addr_lo = dev->net->dev_addr[0] | dev->net->dev_addr[1] << 8 |
 732                 dev->net->dev_addr[2] << 16 | dev->net->dev_addr[3] << 24;
 733         u32 addr_hi = dev->net->dev_addr[4] | dev->net->dev_addr[5] << 8;
 734         int ret;
 735
 736         ret = smsc95xx_write_reg(dev, ADDRL, addr_lo);
 737         check_warn_return(ret, "Failed to write ADDRL: %d\n", ret);
 738
 739         ret = smsc95xx_write_reg(dev, ADDRH, addr_hi);
 740         check_warn_return(ret, "Failed to write ADDRH: %d\n", ret);
 741
 742         return 0;
 743 }
 744
 745 /* starts the TX path */
 746 static int smsc95xx_start_tx_path(struct usbnet *dev)
 747 {
 748         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
 749         unsigned long flags;
 750         int ret;
 751
 752         /* Enable Tx at MAC */
 753         spin_lock_irqsave(&pdata->mac_cr_lock, flags);
 754         pdata->mac_cr |= MAC_CR_TXEN_;
 755         spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
 756
 757         ret = smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr);
 758         check_warn_return(ret, "Failed to write MAC_CR: %d\n", ret);
 759
 760         /* Enable Tx at SCSRs */
 761         ret = smsc95xx_write_reg(dev, TX_CFG, TX_CFG_ON_);
 762         check_warn_return(ret, "Failed to write TX_CFG: %d\n", ret);
 763
 764         return 0;
 765 }
 766
 767 /* Starts the Receive path */
 768 static int smsc95xx_start_rx_path(struct usbnet *dev)
 769 {
 770         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
 771         unsigned long flags;
 772         int ret;
 773
 774         spin_lock_irqsave(&pdata->mac_cr_lock, flags);
 775         pdata->mac_cr |= MAC_CR_RXEN_;
 776         spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
 777
 778         ret = smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr);
 779         check_warn_return(ret, "Failed to write MAC_CR: %d\n", ret);
 780
 781         return 0;
 782 }
 783
 784 static int smsc95xx_phy_initialize(struct usbnet *dev)
 785 {
 786         int bmcr, ret, timeout = 0;
 787
 788         /* Initialize MII structure */
 789         dev->mii.dev = dev->net;
 790         dev->mii.mdio_read = smsc95xx_mdio_read;
 791         dev->mii.mdio_write = smsc95xx_mdio_write;
 792         dev->mii.phy_id_mask = 0x1f;
 793         dev->mii.reg_num_mask = 0x1f;
 794         dev->mii.phy_id = SMSC95XX_INTERNAL_PHY_ID;
 795
 796         /* reset phy and wait for reset to complete */
 797         smsc95xx_mdio_write(dev->net, dev->mii.phy_id, MII_BMCR, BMCR_RESET);
 798
 799         do {
 800                 msleep(10);
 801                 bmcr = smsc95xx_mdio_read(dev->net, dev->mii.phy_id, MII_BMCR);
 802                 timeout++;
 803         } while ((bmcr & BMCR_RESET) && (timeout < 100));
 804
 805         if (timeout >= 100) {
 806                 netdev_warn(dev->net, "timeout on PHY Reset");
 807                 return -EIO;
 808         }
 809
 810         smsc95xx_mdio_write(dev->net, dev->mii.phy_id, MII_ADVERTISE,
 811                 ADVERTISE_ALL | ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP |
 812                 ADVERTISE_PAUSE_ASYM);
 813
 814         /* read to clear */
 815         ret = smsc95xx_mdio_read(dev->net, dev->mii.phy_id, PHY_INT_SRC);
 816         check_warn_return(ret, "Failed to read PHY_INT_SRC during init");
 817
 818         smsc95xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_MASK,
 819                 PHY_INT_MASK_DEFAULT_);
 820         mii_nway_restart(&dev->mii);
 821
 822         netif_dbg(dev, ifup, dev->net, "phy initialised successfully\n");
 823         return 0;
 824 }
 825
 826 static int smsc95xx_reset(struct usbnet *dev)
 827 {
 828         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
 829         u32 read_buf, write_buf, burst_cap;
 830         int ret = 0, timeout;
 831
 832         netif_dbg(dev, ifup, dev->net, "entering smsc95xx_reset\n");
 833
 834         ret = smsc95xx_write_reg(dev, HW_CFG, HW_CFG_LRST_);
 835         check_warn_return(ret, "Failed to write HW_CFG_LRST_ bit in HW_CFG\n");
 836
 837         timeout = 0;
 838         do {
 839                 msleep(10);
 840                 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
 841                 check_warn_return(ret, "Failed to read HW_CFG: %d\n", ret);
 842                 timeout++;
 843         } while ((read_buf & HW_CFG_LRST_) && (timeout < 100));
 844
 845         if (timeout >= 100) {
 846                 netdev_warn(dev->net, "timeout waiting for completion of Lite Reset\n");
 847                 return ret;
 848         }
 849
 850         ret = smsc95xx_write_reg(dev, PM_CTRL, PM_CTL_PHY_RST_);
 851         check_warn_return(ret, "Failed to write PM_CTRL: %d\n", ret);
 852
 853         timeout = 0;
 854         do {
 855                 msleep(10);
 856                 ret = smsc95xx_read_reg(dev, PM_CTRL, &read_buf);
 857                 check_warn_return(ret, "Failed to read PM_CTRL: %d\n", ret);
 858                 timeout++;
 859         } while ((read_buf & PM_CTL_PHY_RST_) && (timeout < 100));
 860
 861         if (timeout >= 100) {
 862                 netdev_warn(dev->net, "timeout waiting for PHY Reset\n");
 863                 return ret;
 864         }
 865
 866         ret = smsc95xx_set_mac_address(dev);
 867         if (ret < 0)
 868                 return ret;
 869
 870         netif_dbg(dev, ifup, dev->net,
 871                   "MAC Address: %pM\n", dev->net->dev_addr);
 872
 873         ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
 874         check_warn_return(ret, "Failed to read HW_CFG: %d\n", ret);
 875
 876         netif_dbg(dev, ifup, dev->net,
 877                   "Read Value from HW_CFG : 0x%08x\n", read_buf);
 878
 879         read_buf |= HW_CFG_BIR_;
 880
 881         ret = smsc95xx_write_reg(dev, HW_CFG, read_buf);
 882         check_warn_return(ret, "Failed to write HW_CFG_BIR_ bit in HW_CFG\n");
 883
 884         ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
 885         check_warn_return(ret, "Failed to read HW_CFG: %d\n", ret);
 886         netif_dbg(dev, ifup, dev->net,
 887                   "Read Value from HW_CFG after writing HW_CFG_BIR_: 0x%08x\n",
 888                   read_buf);
 889
 890         if (!turbo_mode) {
 891                 burst_cap = 0;
 892                 dev->rx_urb_size = MAX_SINGLE_PACKET_SIZE;
 893         } else if (dev->udev->speed == USB_SPEED_HIGH) {
 894                 burst_cap = DEFAULT_HS_BURST_CAP_SIZE / HS_USB_PKT_SIZE;
 895                 dev->rx_urb_size = DEFAULT_HS_BURST_CAP_SIZE;
 896         } else {
 897                 burst_cap = DEFAULT_FS_BURST_CAP_SIZE / FS_USB_PKT_SIZE;
 898                 dev->rx_urb_size = DEFAULT_FS_BURST_CAP_SIZE;
 899         }
 900
 901         netif_dbg(dev, ifup, dev->net,
 902                   "rx_urb_size=%ld\n", (ulong)dev->rx_urb_size);
 903
 904         ret = smsc95xx_write_reg(dev, BURST_CAP, burst_cap);
 905         check_warn_return(ret, "Failed to write BURST_CAP: %d\n", ret);
 906
 907         ret = smsc95xx_read_reg(dev, BURST_CAP, &read_buf);
 908         check_warn_return(ret, "Failed to read BURST_CAP: %d\n", ret);
 909
 910         netif_dbg(dev, ifup, dev->net,
 911                   "Read Value from BURST_CAP after writing: 0x%08x\n",
 912                   read_buf);
 913
 914         ret = smsc95xx_write_reg(dev, BULK_IN_DLY, DEFAULT_BULK_IN_DELAY);
 915         check_warn_return(ret, "Failed to write BULK_IN_DLY: %d\n", ret);
 916
 917         ret = smsc95xx_read_reg(dev, BULK_IN_DLY, &read_buf);
 918         check_warn_return(ret, "Failed to read BULK_IN_DLY: %d\n", ret);
 919
 920         netif_dbg(dev, ifup, dev->net,
 921                   "Read Value from BULK_IN_DLY after writing: 0x%08x\n",
 922                   read_buf);
 923
 924         ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
 925         check_warn_return(ret, "Failed to read HW_CFG: %d\n", ret);
 926
 927         netif_dbg(dev, ifup, dev->net,
 928                   "Read Value from HW_CFG: 0x%08x\n", read_buf);
 929
 930         if (turbo_mode)
 931                 read_buf |= (HW_CFG_MEF_ | HW_CFG_BCE_);
 932
 933         read_buf &= ~HW_CFG_RXDOFF_;
 934
 935         /* set Rx data offset=2, Make IP header aligns on word boundary. */
 936         read_buf |= NET_IP_ALIGN << 9;
 937
 938         ret = smsc95xx_write_reg(dev, HW_CFG, read_buf);
 939         check_warn_return(ret, "Failed to write HW_CFG: %d\n", ret);
 940
 941         ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
 942         check_warn_return(ret, "Failed to read HW_CFG: %d\n", ret);
 943
 944         netif_dbg(dev, ifup, dev->net,
 945                   "Read Value from HW_CFG after writing: 0x%08x\n", read_buf);
 946
 947         ret = smsc95xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL_);
 948         check_warn_return(ret, "Failed to write INT_STS: %d\n", ret);
 949
 950         ret = smsc95xx_read_reg(dev, ID_REV, &read_buf);
 951         check_warn_return(ret, "Failed to read ID_REV: %d\n", ret);
 952         netif_dbg(dev, ifup, dev->net, "ID_REV = 0x%08x\n", read_buf);
 953
 954         /* Configure GPIO pins as LED outputs */
 955         write_buf = LED_GPIO_CFG_SPD_LED | LED_GPIO_CFG_LNK_LED |
 956                 LED_GPIO_CFG_FDX_LED;
 957         ret = smsc95xx_write_reg(dev, LED_GPIO_CFG, write_buf);
 958         check_warn_return(ret, "Failed to write LED_GPIO_CFG: %d\n", ret);
 959
 960         /* Init Tx */
 961         ret = smsc95xx_write_reg(dev, FLOW, 0);
 962         check_warn_return(ret, "Failed to write FLOW: %d\n", ret);
 963
 964         ret = smsc95xx_write_reg(dev, AFC_CFG, AFC_CFG_DEFAULT);
 965         check_warn_return(ret, "Failed to write AFC_CFG: %d\n", ret);
 966
 967         /* Don't need mac_cr_lock during initialisation */
 968         ret = smsc95xx_read_reg(dev, MAC_CR, &pdata->mac_cr);
 969         check_warn_return(ret, "Failed to read MAC_CR: %d\n", ret);
 970
 971         /* Init Rx */
 972         /* Set Vlan */
 973         ret = smsc95xx_write_reg(dev, VLAN1, (u32)ETH_P_8021Q);
 974         check_warn_return(ret, "Failed to write VLAN1: %d\n", ret);
 975
 976         /* Enable or disable checksum offload engines */
 977         ret = smsc95xx_set_features(dev->net, dev->net->features);
 978         check_warn_return(ret, "Failed to set checksum offload features");
 979
 980         smsc95xx_set_multicast(dev->net);
 981
 982         ret = smsc95xx_phy_initialize(dev);
 983         check_warn_return(ret, "Failed to init PHY");
 984
 985         ret = smsc95xx_read_reg(dev, INT_EP_CTL, &read_buf);
 986         check_warn_return(ret, "Failed to read INT_EP_CTL: %d\n", ret);
 987
 988         /* enable PHY interrupts */
 989         read_buf |= INT_EP_CTL_PHY_INT_;
 990
 991         ret = smsc95xx_write_reg(dev, INT_EP_CTL, read_buf);
 992         check_warn_return(ret, "Failed to write INT_EP_CTL: %d\n", ret);
 993
 994         ret = smsc95xx_start_tx_path(dev);
 995         check_warn_return(ret, "Failed to start TX path");
 996
 997         ret = smsc95xx_start_rx_path(dev);
 998         check_warn_return(ret, "Failed to start RX path");
 999
1000         netif_dbg(dev, ifup, dev->net, "smsc95xx_reset, return 0\n");
1001         return 0;
1002 }
1003
1004 static const struct net_device_ops smsc95xx_netdev_ops = {
1005         .ndo_open               = usbnet_open,
1006         .ndo_stop               = usbnet_stop,
1007         .ndo_start_xmit         = usbnet_start_xmit,
1008         .ndo_tx_timeout         = usbnet_tx_timeout,
1009         .ndo_change_mtu         = usbnet_change_mtu,
1010         .ndo_set_mac_address    = eth_mac_addr,
1011         .ndo_validate_addr      = eth_validate_addr,
1012         .ndo_do_ioctl           = smsc95xx_ioctl,
1013         .ndo_set_rx_mode        = smsc95xx_set_multicast,
1014         .ndo_set_features       = smsc95xx_set_features,
1015 };
1016
1017 static int smsc95xx_bind(struct usbnet *dev, struct usb_interface *intf)
1018 {
1019         struct smsc95xx_priv *pdata = NULL;
1020         int ret;
1021
1022         printk(KERN_INFO SMSC_CHIPNAME " v" SMSC_DRIVER_VERSION "\n");
1023
1024         ret = usbnet_get_endpoints(dev, intf);
1025         check_warn_return(ret, "usbnet_get_endpoints failed: %d\n", ret);
1026
1027         dev->data[0] = (unsigned long)kzalloc(sizeof(struct smsc95xx_priv),
1028                 GFP_KERNEL);
1029
1030         pdata = (struct smsc95xx_priv *)(dev->data[0]);
1031         if (!pdata) {
1032                 netdev_warn(dev->net, "Unable to allocate struct smsc95xx_priv\n");
1033                 return -ENOMEM;
1034         }
1035
1036         spin_lock_init(&pdata->mac_cr_lock);
1037
1038         if (DEFAULT_TX_CSUM_ENABLE)
1039                 dev->net->features |= NETIF_F_HW_CSUM;
1040         if (DEFAULT_RX_CSUM_ENABLE)
1041                 dev->net->features |= NETIF_F_RXCSUM;
1042
1043         dev->net->hw_features = NETIF_F_HW_CSUM | NETIF_F_RXCSUM;
1044
1045         smsc95xx_init_mac_address(dev);
1046
1047         /* Init all registers */
1048         ret = smsc95xx_reset(dev);
1049
1050         dev->net->netdev_ops = &smsc95xx_netdev_ops;
1051         dev->net->ethtool_ops = &smsc95xx_ethtool_ops;
1052         dev->net->flags |= IFF_MULTICAST;
1053         dev->net->hard_header_len += SMSC95XX_TX_OVERHEAD_CSUM;
1054         dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len;
1055         return 0;
1056 }
1057
1058 static void smsc95xx_unbind(struct usbnet *dev, struct usb_interface *intf)
1059 {
1060         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1061         if (pdata) {
1062                 netif_dbg(dev, ifdown, dev->net, "free pdata\n");
1063                 kfree(pdata);
1064                 pdata = NULL;
1065                 dev->data[0] = 0;
1066         }
1067 }
1068
1069 static int smsc95xx_suspend(struct usb_interface *intf, pm_message_t message)
1070 {
1071         struct usbnet *dev = usb_get_intfdata(intf);
1072         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1073         int ret;
1074         u32 val;
1075
1076         ret = usbnet_suspend(intf, message);
1077         check_warn_return(ret, "usbnet_suspend error");
1078
1079         /* if no wol options set, enter lowest power SUSPEND2 mode */
1080         if (!(pdata->wolopts & SUPPORTED_WAKE)) {
1081                 netdev_info(dev->net, "entering SUSPEND2 mode");
1082
1083                 /* disable energy detect (link up) & wake up events */
1084                 ret = smsc95xx_read_reg(dev, WUCSR, &val);
1085                 check_warn_return(ret, "Error reading WUCSR");
1086
1087                 val &= ~(WUCSR_MPEN_ | WUCSR_WAKE_EN_);
1088
1089                 ret = smsc95xx_write_reg(dev, WUCSR, val);
1090                 check_warn_return(ret, "Error writing WUCSR");
1091
1092                 ret = smsc95xx_read_reg(dev, PM_CTRL, &val);
1093                 check_warn_return(ret, "Error reading PM_CTRL");
1094
1095                 val &= ~(PM_CTL_ED_EN_ | PM_CTL_WOL_EN_);
1096
1097                 ret = smsc95xx_write_reg(dev, PM_CTRL, val);
1098                 check_warn_return(ret, "Error writing PM_CTRL");
1099
1100                 /* enter suspend2 mode */
1101                 ret = smsc95xx_read_reg(dev, PM_CTRL, &val);
1102                 check_warn_return(ret, "Error reading PM_CTRL");
1103
1104                 val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_);
1105                 val |= PM_CTL_SUS_MODE_2;
1106
1107                 ret = smsc95xx_write_reg(dev, PM_CTRL, val);
1108                 check_warn_return(ret, "Error writing PM_CTRL");
1109
1110                 return 0;
1111         }
1112
1113         if (pdata->wolopts & WAKE_MAGIC) {
1114                 /* clear any pending magic packet status */
1115                 ret = smsc95xx_read_reg(dev, WUCSR, &val);
1116                 check_warn_return(ret, "Error reading WUCSR");
1117
1118                 val |= WUCSR_MPR_;
1119
1120                 ret = smsc95xx_write_reg(dev, WUCSR, val);
1121                 check_warn_return(ret, "Error writing WUCSR");
1122         }
1123
1124         /* enable/disable magic packup wake */
1125         ret = smsc95xx_read_reg(dev, WUCSR, &val);
1126         check_warn_return(ret, "Error reading WUCSR");
1127
1128         if (pdata->wolopts & WAKE_MAGIC) {
1129                 netdev_info(dev->net, "enabling magic packet wakeup");
1130                 val |= WUCSR_MPEN_;
1131         } else {
1132                 netdev_info(dev->net, "disabling magic packet wakeup");
1133                 val &= ~WUCSR_MPEN_;
1134         }
1135
1136         ret = smsc95xx_write_reg(dev, WUCSR, val);
1137         check_warn_return(ret, "Error writing WUCSR");
1138
1139         /* enable wol wakeup source */
1140         ret = smsc95xx_read_reg(dev, PM_CTRL, &val);
1141         check_warn_return(ret, "Error reading PM_CTRL");
1142
1143         val |= PM_CTL_WOL_EN_;
1144
1145         ret = smsc95xx_write_reg(dev, PM_CTRL, val);
1146         check_warn_return(ret, "Error writing PM_CTRL");
1147
1148         /* enable receiver */
1149         smsc95xx_start_rx_path(dev);
1150
1151         /* some wol options are enabled, so enter SUSPEND0 */
1152         netdev_info(dev->net, "entering SUSPEND0 mode");
1153
1154         ret = smsc95xx_read_reg(dev, PM_CTRL, &val);
1155         check_warn_return(ret, "Error reading PM_CTRL");
1156
1157         val &= (~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_));
1158         val |= PM_CTL_SUS_MODE_0;
1159
1160         ret = smsc95xx_write_reg(dev, PM_CTRL, val);
1161         check_warn_return(ret, "Error writing PM_CTRL");
1162
1163         /* clear wol status */
1164         val &= ~PM_CTL_WUPS_;
1165         val |= PM_CTL_WUPS_WOL_;
1166         ret = smsc95xx_write_reg(dev, PM_CTRL, val);
1167         check_warn_return(ret, "Error writing PM_CTRL");
1168
1169         /* read back PM_CTRL */
1170         ret = smsc95xx_read_reg(dev, PM_CTRL, &val);
1171         check_warn_return(ret, "Error reading PM_CTRL");
1172
1173         smsc95xx_set_feature(dev, USB_DEVICE_REMOTE_WAKEUP);
1174
1175         return 0;
1176 }
1177
1178 static int smsc95xx_resume(struct usb_interface *intf)
1179 {
1180         struct usbnet *dev = usb_get_intfdata(intf);
1181         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1182         int ret;
1183         u32 val;
1184
1185         BUG_ON(!dev);
1186
1187         if (pdata->wolopts & WAKE_MAGIC) {
1188                 smsc95xx_clear_feature(dev, USB_DEVICE_REMOTE_WAKEUP);
1189
1190                 /* Disable magic packup wake */
1191                 ret = smsc95xx_read_reg(dev, WUCSR, &val);
1192                 check_warn_return(ret, "Error reading WUCSR");
1193
1194                 val &= ~WUCSR_MPEN_;
1195
1196                 ret = smsc95xx_write_reg(dev, WUCSR, val);
1197                 check_warn_return(ret, "Error writing WUCSR");
1198
1199                 /* clear wake-up status */
1200                 ret = smsc95xx_read_reg(dev, PM_CTRL, &val);
1201                 check_warn_return(ret, "Error reading PM_CTRL");
1202
1203                 val &= ~PM_CTL_WOL_EN_;
1204                 val |= PM_CTL_WUPS_;
1205
1206                 ret = smsc95xx_write_reg(dev, PM_CTRL, val);
1207                 check_warn_return(ret, "Error writing PM_CTRL");
1208         }
1209
1210         return usbnet_resume(intf);
1211         check_warn_return(ret, "usbnet_resume error");
1212
1213         return 0;
1214 }
1215
1216 static void smsc95xx_rx_csum_offload(struct sk_buff *skb)
1217 {
1218         skb->csum = *(u16 *)(skb_tail_pointer(skb) - 2);
1219         skb->ip_summed = CHECKSUM_COMPLETE;
1220         skb_trim(skb, skb->len - 2);
1221 }
1222
1223 static int smsc95xx_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
1224 {
1225         while (skb->len > 0) {
1226                 u32 header, align_count;
1227                 struct sk_buff *ax_skb;
1228                 unsigned char *packet;
1229                 u16 size;
1230
1231                 memcpy(&header, skb->data, sizeof(header));
1232                 le32_to_cpus(&header);
1233                 skb_pull(skb, 4 + NET_IP_ALIGN);
1234                 packet = skb->data;
1235
1236                 /* get the packet length */
1237                 size = (u16)((header & RX_STS_FL_) >> 16);
1238                 align_count = (4 - ((size + NET_IP_ALIGN) % 4)) % 4;
1239
1240                 if (unlikely(header & RX_STS_ES_)) {
1241                         netif_dbg(dev, rx_err, dev->net,
1242                                   "Error header=0x%08x\n", header);
1243                         dev->net->stats.rx_errors++;
1244                         dev->net->stats.rx_dropped++;
1245
1246                         if (header & RX_STS_CRC_) {
1247                                 dev->net->stats.rx_crc_errors++;
1248                         } else {
1249                                 if (header & (RX_STS_TL_ | RX_STS_RF_))
1250                                         dev->net->stats.rx_frame_errors++;
1251
1252                                 if ((header & RX_STS_LE_) &&
1253                                         (!(header & RX_STS_FT_)))
1254                                         dev->net->stats.rx_length_errors++;
1255                         }
1256                 } else {
1257                         /* ETH_FRAME_LEN + 4(CRC) + 2(COE) + 4(Vlan) */
1258                         if (unlikely(size > (ETH_FRAME_LEN + 12))) {
1259                                 netif_dbg(dev, rx_err, dev->net,
1260                                           "size err header=0x%08x\n", header);
1261                                 return 0;
1262                         }
1263
1264                         /* last frame in this batch */
1265                         if (skb->len == size) {
1266                                 if (dev->net->features & NETIF_F_RXCSUM)
1267                                         smsc95xx_rx_csum_offload(skb);
1268                                 skb_trim(skb, skb->len - 4); /* remove fcs */
1269                                 skb->truesize = size + sizeof(struct sk_buff);
1270
1271                                 return 1;
1272                         }
1273
1274                         ax_skb = skb_clone(skb, GFP_ATOMIC);
1275                         if (unlikely(!ax_skb)) {
1276                                 netdev_warn(dev->net, "Error allocating skb\n");
1277                                 return 0;
1278                         }
1279
1280                         ax_skb->len = size;
1281                         ax_skb->data = packet;
1282                         skb_set_tail_pointer(ax_skb, size);
1283
1284                         if (dev->net->features & NETIF_F_RXCSUM)
1285                                 smsc95xx_rx_csum_offload(ax_skb);
1286                         skb_trim(ax_skb, ax_skb->len - 4); /* remove fcs */
1287                         ax_skb->truesize = size + sizeof(struct sk_buff);
1288
1289                         usbnet_skb_return(dev, ax_skb);
1290                 }
1291
1292                 skb_pull(skb, size);
1293
1294                 /* padding bytes before the next frame starts */
1295                 if (skb->len)
1296                         skb_pull(skb, align_count);
1297         }
1298
1299         if (unlikely(skb->len < 0)) {
1300                 netdev_warn(dev->net, "invalid rx length<0 %d\n", skb->len);
1301                 return 0;
1302         }
1303
1304         return 1;
1305 }
1306
1307 static u32 smsc95xx_calc_csum_preamble(struct sk_buff *skb)
1308 {
1309         u16 low_16 = (u16)skb_checksum_start_offset(skb);
1310         u16 high_16 = low_16 + skb->csum_offset;
1311         return (high_16 << 16) | low_16;
1312 }
1313
1314 static struct sk_buff *smsc95xx_tx_fixup(struct usbnet *dev,
1315                                          struct sk_buff *skb, gfp_t flags)
1316 {
1317         bool csum = skb->ip_summed == CHECKSUM_PARTIAL;
1318         int overhead = csum ? SMSC95XX_TX_OVERHEAD_CSUM : SMSC95XX_TX_OVERHEAD;
1319         u32 tx_cmd_a, tx_cmd_b;
1320
1321         /* We do not advertise SG, so skbs should be already linearized */
1322         BUG_ON(skb_shinfo(skb)->nr_frags);
1323
1324         if (skb_headroom(skb) < overhead) {
1325                 struct sk_buff *skb2 = skb_copy_expand(skb,
1326                         overhead, 0, flags);
1327                 dev_kfree_skb_any(skb);
1328                 skb = skb2;
1329                 if (!skb)
1330                         return NULL;
1331         }
1332
1333         if (csum) {
1334                 if (skb->len <= 45) {
1335                         /* workaround - hardware tx checksum does not work
1336                          * properly with extremely small packets */
1337                         long csstart = skb_checksum_start_offset(skb);
1338                         __wsum calc = csum_partial(skb->data + csstart,
1339                                 skb->len - csstart, 0);
1340                         *((__sum16 *)(skb->data + csstart
1341                                 + skb->csum_offset)) = csum_fold(calc);
1342
1343                         csum = false;
1344                 } else {
1345                         u32 csum_preamble = smsc95xx_calc_csum_preamble(skb);
1346                         skb_push(skb, 4);
1347                         memcpy(skb->data, &csum_preamble, 4);
1348                 }
1349         }
1350
1351         skb_push(skb, 4);
1352         tx_cmd_b = (u32)(skb->len - 4);
1353         if (csum)
1354                 tx_cmd_b |= TX_CMD_B_CSUM_ENABLE;
1355         cpu_to_le32s(&tx_cmd_b);
1356         memcpy(skb->data, &tx_cmd_b, 4);
1357
1358         skb_push(skb, 4);
1359         tx_cmd_a = (u32)(skb->len - 8) | TX_CMD_A_FIRST_SEG_ |
1360                 TX_CMD_A_LAST_SEG_;
1361         cpu_to_le32s(&tx_cmd_a);
1362         memcpy(skb->data, &tx_cmd_a, 4);
1363
1364         return skb;
1365 }
1366
1367 static const struct driver_info smsc95xx_info = {
1368         .description    = "smsc95xx USB 2.0 Ethernet",
1369         .bind           = smsc95xx_bind,
1370         .unbind         = smsc95xx_unbind,
1371         .link_reset     = smsc95xx_link_reset,
1372         .reset          = smsc95xx_reset,
1373         .rx_fixup       = smsc95xx_rx_fixup,
1374         .tx_fixup       = smsc95xx_tx_fixup,
1375         .status         = smsc95xx_status,
1376         .flags          = FLAG_ETHER | FLAG_SEND_ZLP | FLAG_LINK_INTR,
1377 };
1378
1379 static const struct usb_device_id products[] = {
1380         {
1381                 /* SMSC9500 USB Ethernet Device */
1382                 USB_DEVICE(0x0424, 0x9500),
1383                 .driver_info = (unsigned long) &smsc95xx_info,
1384         },
1385         {
1386                 /* SMSC9505 USB Ethernet Device */
1387                 USB_DEVICE(0x0424, 0x9505),
1388                 .driver_info = (unsigned long) &smsc95xx_info,
1389         },
1390         {
1391                 /* SMSC9500A USB Ethernet Device */
1392                 USB_DEVICE(0x0424, 0x9E00),
1393                 .driver_info = (unsigned long) &smsc95xx_info,
1394         },
1395         {
1396                 /* SMSC9505A USB Ethernet Device */
1397                 USB_DEVICE(0x0424, 0x9E01),
1398                 .driver_info = (unsigned long) &smsc95xx_info,
1399         },
1400         {
1401                 /* SMSC9512/9514 USB Hub & Ethernet Device */
1402                 USB_DEVICE(0x0424, 0xec00),
1403                 .driver_info = (unsigned long) &smsc95xx_info,
1404         },
1405         {
1406                 /* SMSC9500 USB Ethernet Device (SAL10) */
1407                 USB_DEVICE(0x0424, 0x9900),
1408                 .driver_info = (unsigned long) &smsc95xx_info,
1409         },
1410         {
1411                 /* SMSC9505 USB Ethernet Device (SAL10) */
1412                 USB_DEVICE(0x0424, 0x9901),
1413                 .driver_info = (unsigned long) &smsc95xx_info,
1414         },
1415         {
1416                 /* SMSC9500A USB Ethernet Device (SAL10) */
1417                 USB_DEVICE(0x0424, 0x9902),
1418                 .driver_info = (unsigned long) &smsc95xx_info,
1419         },
1420         {
1421                 /* SMSC9505A USB Ethernet Device (SAL10) */
1422                 USB_DEVICE(0x0424, 0x9903),
1423                 .driver_info = (unsigned long) &smsc95xx_info,
1424         },
1425         {
1426                 /* SMSC9512/9514 USB Hub & Ethernet Device (SAL10) */
1427                 USB_DEVICE(0x0424, 0x9904),
1428                 .driver_info = (unsigned long) &smsc95xx_info,
1429         },
1430         {
1431                 /* SMSC9500A USB Ethernet Device (HAL) */
1432                 USB_DEVICE(0x0424, 0x9905),
1433                 .driver_info = (unsigned long) &smsc95xx_info,
1434         },
1435         {
1436                 /* SMSC9505A USB Ethernet Device (HAL) */
1437                 USB_DEVICE(0x0424, 0x9906),
1438                 .driver_info = (unsigned long) &smsc95xx_info,
1439         },
1440         {
1441                 /* SMSC9500 USB Ethernet Device (Alternate ID) */
1442                 USB_DEVICE(0x0424, 0x9907),
1443                 .driver_info = (unsigned long) &smsc95xx_info,
1444         },
1445         {
1446                 /* SMSC9500A USB Ethernet Device (Alternate ID) */
1447                 USB_DEVICE(0x0424, 0x9908),
1448                 .driver_info = (unsigned long) &smsc95xx_info,
1449         },
1450         {
1451                 /* SMSC9512/9514 USB Hub & Ethernet Device (Alternate ID) */
1452                 USB_DEVICE(0x0424, 0x9909),
1453                 .driver_info = (unsigned long) &smsc95xx_info,
1454         },
1455         {
1456                 /* SMSC LAN9530 USB Ethernet Device */
1457                 USB_DEVICE(0x0424, 0x9530),
1458                 .driver_info = (unsigned long) &smsc95xx_info,
1459         },
1460         {
1461                 /* SMSC LAN9730 USB Ethernet Device */
1462                 USB_DEVICE(0x0424, 0x9730),
1463                 .driver_info = (unsigned long) &smsc95xx_info,
1464         },
1465         {
1466                 /* SMSC LAN89530 USB Ethernet Device */
1467                 USB_DEVICE(0x0424, 0x9E08),
1468                 .driver_info = (unsigned long) &smsc95xx_info,
1469         },
1470         { },            /* END */
1471 };
1472 MODULE_DEVICE_TABLE(usb, products);
1473
1474 static struct usb_driver smsc95xx_driver = {
1475         .name           = "smsc95xx",
1476         .id_table       = products,
1477         .probe          = usbnet_probe,
1478         .suspend        = smsc95xx_suspend,
1479         .resume         = smsc95xx_resume,
1480         .reset_resume   = smsc95xx_resume,
1481         .disconnect     = usbnet_disconnect,
1482         .disable_hub_initiated_lpm = 1,
1483 };
1484
1485 module_usb_driver(smsc95xx_driver);
1486
1487 MODULE_AUTHOR("Nancy Lin");
1488 MODULE_AUTHOR("Steve Glendinning <steve.glendinning@shawell.net>");
1489 MODULE_DESCRIPTION("SMSC95XX USB 2.0 Ethernet Devices");
1490 MODULE_LICENSE("GPL");