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/bitrev.h>
  30 #include <linux/crc16.h>
  31 #include <linux/crc32.h>
  32 #include <linux/usb/usbnet.h>
  33 #include <linux/slab.h>
  34 #include "smsc95xx.h"
  35
  36 #define SMSC_CHIPNAME                   "smsc95xx"
  37 #define SMSC_DRIVER_VERSION             "1.0.4"
  38 #define HS_USB_PKT_SIZE                 (512)
  39 #define FS_USB_PKT_SIZE                 (64)
  40 #define DEFAULT_HS_BURST_CAP_SIZE       (16 * 1024 + 5 * HS_USB_PKT_SIZE)
  41 #define DEFAULT_FS_BURST_CAP_SIZE       (6 * 1024 + 33 * FS_USB_PKT_SIZE)
  42 #define DEFAULT_BULK_IN_DELAY           (0x00002000)
  43 #define MAX_SINGLE_PACKET_SIZE          (2048)
  44 #define LAN95XX_EEPROM_MAGIC            (0x9500)
  45 #define EEPROM_MAC_OFFSET               (0x01)
  46 #define DEFAULT_TX_CSUM_ENABLE          (true)
  47 #define DEFAULT_RX_CSUM_ENABLE          (true)
  48 #define SMSC95XX_INTERNAL_PHY_ID        (1)
  49 #define SMSC95XX_TX_OVERHEAD            (8)
  50 #define SMSC95XX_TX_OVERHEAD_CSUM       (12)
  51 #define SUPPORTED_WAKE                  (WAKE_PHY | WAKE_UCAST | WAKE_BCAST | \
  52                                          WAKE_MCAST | WAKE_ARP | WAKE_MAGIC)
  53
  54 #define FEATURE_8_WAKEUP_FILTERS        (0x01)
  55 #define FEATURE_PHY_NLP_CROSSOVER       (0x02)
  56 #define FEATURE_AUTOSUSPEND             (0x04)
  57
  58 struct smsc95xx_priv {
  59         u32 mac_cr;
  60         u32 hash_hi;
  61         u32 hash_lo;
  62         u32 wolopts;
  63         spinlock_t mac_cr_lock;
  64         u8 features;
  65 };
  66
  67 static bool turbo_mode = true;
  68 module_param(turbo_mode, bool, 0644);
  69 MODULE_PARM_DESC(turbo_mode, "Enable multiple frames per Rx transaction");
  70
  71 static int __must_check __smsc95xx_read_reg(struct usbnet *dev, u32 index,
  72                                             u32 *data, int in_pm)
  73 {
  74         u32 buf;
  75         int ret;
  76         int (*fn)(struct usbnet *, u8, u8, u16, u16, void *, u16);
  77
  78         BUG_ON(!dev);
  79
  80         if (!in_pm)
  81                 fn = usbnet_read_cmd;
  82         else
  83                 fn = usbnet_read_cmd_nopm;
  84
  85         ret = fn(dev, USB_VENDOR_REQUEST_READ_REGISTER, USB_DIR_IN
  86                  | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
  87                  0, index, &buf, 4);
  88         if (unlikely(ret < 0))
  89                 netdev_warn(dev->net, "Failed to read reg index 0x%08x: %d\n",
  90                             index, ret);
  91
  92         le32_to_cpus(&buf);
  93         *data = buf;
  94
  95         return ret;
  96 }
  97
  98 static int __must_check __smsc95xx_write_reg(struct usbnet *dev, u32 index,
  99                                              u32 data, int in_pm)
 100 {
 101         u32 buf;
 102         int ret;
 103         int (*fn)(struct usbnet *, u8, u8, u16, u16, const void *, u16);
 104
 105         BUG_ON(!dev);
 106
 107         if (!in_pm)
 108                 fn = usbnet_write_cmd;
 109         else
 110                 fn = usbnet_write_cmd_nopm;
 111
 112         buf = data;
 113         cpu_to_le32s(&buf);
 114
 115         ret = fn(dev, USB_VENDOR_REQUEST_WRITE_REGISTER, USB_DIR_OUT
 116                  | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 117                  0, index, &buf, 4);
 118         if (unlikely(ret < 0))
 119                 netdev_warn(dev->net, "Failed to write reg index 0x%08x: %d\n",
 120                             index, ret);
 121
 122         return ret;
 123 }
 124
 125 static int __must_check smsc95xx_read_reg_nopm(struct usbnet *dev, u32 index,
 126                                                u32 *data)
 127 {
 128         return __smsc95xx_read_reg(dev, index, data, 1);
 129 }
 130
 131 static int __must_check smsc95xx_write_reg_nopm(struct usbnet *dev, u32 index,
 132                                                 u32 data)
 133 {
 134         return __smsc95xx_write_reg(dev, index, data, 1);
 135 }
 136
 137 static int __must_check smsc95xx_read_reg(struct usbnet *dev, u32 index,
 138                                           u32 *data)
 139 {
 140         return __smsc95xx_read_reg(dev, index, data, 0);
 141 }
 142
 143 static int __must_check smsc95xx_write_reg(struct usbnet *dev, u32 index,
 144                                            u32 data)
 145 {
 146         return __smsc95xx_write_reg(dev, index, data, 0);
 147 }
 148
 149 /* Loop until the read is completed with timeout
 150  * called with phy_mutex held */
 151 static int __must_check __smsc95xx_phy_wait_not_busy(struct usbnet *dev,
 152                                                      int in_pm)
 153 {
 154         unsigned long start_time = jiffies;
 155         u32 val;
 156         int ret;
 157
 158         do {
 159                 ret = __smsc95xx_read_reg(dev, MII_ADDR, &val, in_pm);
 160                 if (ret < 0) {
 161                         netdev_warn(dev->net, "Error reading MII_ACCESS\n");
 162                         return ret;
 163                 }
 164
 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                                 int in_pm)
 174 {
 175         struct usbnet *dev = netdev_priv(netdev);
 176         u32 val, addr;
 177         int ret;
 178
 179         mutex_lock(&dev->phy_mutex);
 180
 181         /* confirm MII not busy */
 182         ret = __smsc95xx_phy_wait_not_busy(dev, in_pm);
 183         if (ret < 0) {
 184                 netdev_warn(dev->net, "MII is busy in smsc95xx_mdio_read\n");
 185                 goto done;
 186         }
 187
 188         /* set the address, index & direction (read from PHY) */
 189         phy_id &= dev->mii.phy_id_mask;
 190         idx &= dev->mii.reg_num_mask;
 191         addr = (phy_id << 11) | (idx << 6) | MII_READ_ | MII_BUSY_;
 192         ret = __smsc95xx_write_reg(dev, MII_ADDR, addr, in_pm);
 193         if (ret < 0) {
 194                 netdev_warn(dev->net, "Error writing MII_ADDR\n");
 195                 goto done;
 196         }
 197
 198         ret = __smsc95xx_phy_wait_not_busy(dev, in_pm);
 199         if (ret < 0) {
 200                 netdev_warn(dev->net, "Timed out reading MII reg %02X\n", idx);
 201                 goto done;
 202         }
 203
 204         ret = __smsc95xx_read_reg(dev, MII_DATA, &val, in_pm);
 205         if (ret < 0) {
 206                 netdev_warn(dev->net, "Error reading MII_DATA\n");
 207                 goto done;
 208         }
 209
 210         ret = (u16)(val & 0xFFFF);
 211
 212 done:
 213         mutex_unlock(&dev->phy_mutex);
 214         return ret;
 215 }
 216
 217 static void __smsc95xx_mdio_write(struct net_device *netdev, int phy_id,
 218                                   int idx, int regval, int in_pm)
 219 {
 220         struct usbnet *dev = netdev_priv(netdev);
 221         u32 val, addr;
 222         int ret;
 223
 224         mutex_lock(&dev->phy_mutex);
 225
 226         /* confirm MII not busy */
 227         ret = __smsc95xx_phy_wait_not_busy(dev, in_pm);
 228         if (ret < 0) {
 229                 netdev_warn(dev->net, "MII is busy in smsc95xx_mdio_write\n");
 230                 goto done;
 231         }
 232
 233         val = regval;
 234         ret = __smsc95xx_write_reg(dev, MII_DATA, val, in_pm);
 235         if (ret < 0) {
 236                 netdev_warn(dev->net, "Error writing MII_DATA\n");
 237                 goto done;
 238         }
 239
 240         /* set the address, index & direction (write to PHY) */
 241         phy_id &= dev->mii.phy_id_mask;
 242         idx &= dev->mii.reg_num_mask;
 243         addr = (phy_id << 11) | (idx << 6) | MII_WRITE_ | MII_BUSY_;
 244         ret = __smsc95xx_write_reg(dev, MII_ADDR, addr, in_pm);
 245         if (ret < 0) {
 246                 netdev_warn(dev->net, "Error writing MII_ADDR\n");
 247                 goto done;
 248         }
 249
 250         ret = __smsc95xx_phy_wait_not_busy(dev, in_pm);
 251         if (ret < 0) {
 252                 netdev_warn(dev->net, "Timed out writing MII reg %02X\n", idx);
 253                 goto done;
 254         }
 255
 256 done:
 257         mutex_unlock(&dev->phy_mutex);
 258 }
 259
 260 static int smsc95xx_mdio_read_nopm(struct net_device *netdev, int phy_id,
 261                                    int idx)
 262 {
 263         return __smsc95xx_mdio_read(netdev, phy_id, idx, 1);
 264 }
 265
 266 static void smsc95xx_mdio_write_nopm(struct net_device *netdev, int phy_id,
 267                                      int idx, int regval)
 268 {
 269         __smsc95xx_mdio_write(netdev, phy_id, idx, regval, 1);
 270 }
 271
 272 static int smsc95xx_mdio_read(struct net_device *netdev, int phy_id, int idx)
 273 {
 274         return __smsc95xx_mdio_read(netdev, phy_id, idx, 0);
 275 }
 276
 277 static void smsc95xx_mdio_write(struct net_device *netdev, int phy_id, int idx,
 278                                 int regval)
 279 {
 280         __smsc95xx_mdio_write(netdev, phy_id, idx, regval, 0);
 281 }
 282
 283 static int __must_check smsc95xx_wait_eeprom(struct usbnet *dev)
 284 {
 285         unsigned long start_time = jiffies;
 286         u32 val;
 287         int ret;
 288
 289         do {
 290                 ret = smsc95xx_read_reg(dev, E2P_CMD, &val);
 291                 if (ret < 0) {
 292                         netdev_warn(dev->net, "Error reading E2P_CMD\n");
 293                         return ret;
 294                 }
 295
 296                 if (!(val & E2P_CMD_BUSY_) || (val & E2P_CMD_TIMEOUT_))
 297                         break;
 298                 udelay(40);
 299         } while (!time_after(jiffies, start_time + HZ));
 300
 301         if (val & (E2P_CMD_TIMEOUT_ | E2P_CMD_BUSY_)) {
 302                 netdev_warn(dev->net, "EEPROM read operation timeout\n");
 303                 return -EIO;
 304         }
 305
 306         return 0;
 307 }
 308
 309 static int __must_check smsc95xx_eeprom_confirm_not_busy(struct usbnet *dev)
 310 {
 311         unsigned long start_time = jiffies;
 312         u32 val;
 313         int ret;
 314
 315         do {
 316                 ret = smsc95xx_read_reg(dev, E2P_CMD, &val);
 317                 if (ret < 0) {
 318                         netdev_warn(dev->net, "Error reading E2P_CMD\n");
 319                         return ret;
 320                 }
 321
 322                 if (!(val & E2P_CMD_BUSY_))
 323                         return 0;
 324
 325                 udelay(40);
 326         } while (!time_after(jiffies, start_time + HZ));
 327
 328         netdev_warn(dev->net, "EEPROM is busy\n");
 329         return -EIO;
 330 }
 331
 332 static int smsc95xx_read_eeprom(struct usbnet *dev, u32 offset, u32 length,
 333                                 u8 *data)
 334 {
 335         u32 val;
 336         int i, ret;
 337
 338         BUG_ON(!dev);
 339         BUG_ON(!data);
 340
 341         ret = smsc95xx_eeprom_confirm_not_busy(dev);
 342         if (ret)
 343                 return ret;
 344
 345         for (i = 0; i < length; i++) {
 346                 val = E2P_CMD_BUSY_ | E2P_CMD_READ_ | (offset & E2P_CMD_ADDR_);
 347                 ret = smsc95xx_write_reg(dev, E2P_CMD, val);
 348                 if (ret < 0) {
 349                         netdev_warn(dev->net, "Error writing E2P_CMD\n");
 350                         return ret;
 351                 }
 352
 353                 ret = smsc95xx_wait_eeprom(dev);
 354                 if (ret < 0)
 355                         return ret;
 356
 357                 ret = smsc95xx_read_reg(dev, E2P_DATA, &val);
 358                 if (ret < 0) {
 359                         netdev_warn(dev->net, "Error reading E2P_DATA\n");
 360                         return ret;
 361                 }
 362
 363                 data[i] = val & 0xFF;
 364                 offset++;
 365         }
 366
 367         return 0;
 368 }
 369
 370 static int smsc95xx_write_eeprom(struct usbnet *dev, u32 offset, u32 length,
 371                                  u8 *data)
 372 {
 373         u32 val;
 374         int i, ret;
 375
 376         BUG_ON(!dev);
 377         BUG_ON(!data);
 378
 379         ret = smsc95xx_eeprom_confirm_not_busy(dev);
 380         if (ret)
 381                 return ret;
 382
 383         /* Issue write/erase enable command */
 384         val = E2P_CMD_BUSY_ | E2P_CMD_EWEN_;
 385         ret = smsc95xx_write_reg(dev, E2P_CMD, val);
 386         if (ret < 0) {
 387                 netdev_warn(dev->net, "Error writing E2P_DATA\n");
 388                 return ret;
 389         }
 390
 391         ret = smsc95xx_wait_eeprom(dev);
 392         if (ret < 0)
 393                 return ret;
 394
 395         for (i = 0; i < length; i++) {
 396
 397                 /* Fill data register */
 398                 val = data[i];
 399                 ret = smsc95xx_write_reg(dev, E2P_DATA, val);
 400                 if (ret < 0) {
 401                         netdev_warn(dev->net, "Error writing E2P_DATA\n");
 402                         return ret;
 403                 }
 404
 405                 /* Send "write" command */
 406                 val = E2P_CMD_BUSY_ | E2P_CMD_WRITE_ | (offset & E2P_CMD_ADDR_);
 407                 ret = smsc95xx_write_reg(dev, E2P_CMD, val);
 408                 if (ret < 0) {
 409                         netdev_warn(dev->net, "Error writing E2P_CMD\n");
 410                         return ret;
 411                 }
 412
 413                 ret = smsc95xx_wait_eeprom(dev);
 414                 if (ret < 0)
 415                         return ret;
 416
 417                 offset++;
 418         }
 419
 420         return 0;
 421 }
 422
 423 static int __must_check smsc95xx_write_reg_async(struct usbnet *dev, u16 index,
 424                                                  u32 data)
 425 {
 426         const u16 size = 4;
 427         u32 buf;
 428         int ret;
 429
 430         buf = data;
 431         cpu_to_le32s(&buf);
 432
 433         ret = usbnet_write_cmd_async(dev, USB_VENDOR_REQUEST_WRITE_REGISTER,
 434                                      USB_DIR_OUT | USB_TYPE_VENDOR |
 435                                      USB_RECIP_DEVICE,
 436                                      0, index, &buf, size);
 437         if (ret < 0)
 438                 netdev_warn(dev->net, "Error write async cmd, sts=%d\n",
 439                             ret);
 440         return ret;
 441 }
 442
 443 /* returns hash bit number for given MAC address
 444  * example:
 445  * 01 00 5E 00 00 01 -> returns bit number 31 */
 446 static unsigned int smsc95xx_hash(char addr[ETH_ALEN])
 447 {
 448         return (ether_crc(ETH_ALEN, addr) >> 26) & 0x3f;
 449 }
 450
 451 static void smsc95xx_set_multicast(struct net_device *netdev)
 452 {
 453         struct usbnet *dev = netdev_priv(netdev);
 454         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
 455         unsigned long flags;
 456         int ret;
 457
 458         pdata->hash_hi = 0;
 459         pdata->hash_lo = 0;
 460
 461         spin_lock_irqsave(&pdata->mac_cr_lock, flags);
 462
 463         if (dev->net->flags & IFF_PROMISC) {
 464                 netif_dbg(dev, drv, dev->net, "promiscuous mode enabled\n");
 465                 pdata->mac_cr |= MAC_CR_PRMS_;
 466                 pdata->mac_cr &= ~(MAC_CR_MCPAS_ | MAC_CR_HPFILT_);
 467         } else if (dev->net->flags & IFF_ALLMULTI) {
 468                 netif_dbg(dev, drv, dev->net, "receive all multicast enabled\n");
 469                 pdata->mac_cr |= MAC_CR_MCPAS_;
 470                 pdata->mac_cr &= ~(MAC_CR_PRMS_ | MAC_CR_HPFILT_);
 471         } else if (!netdev_mc_empty(dev->net)) {
 472                 struct netdev_hw_addr *ha;
 473
 474                 pdata->mac_cr |= MAC_CR_HPFILT_;
 475                 pdata->mac_cr &= ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_);
 476
 477                 netdev_for_each_mc_addr(ha, netdev) {
 478                         u32 bitnum = smsc95xx_hash(ha->addr);
 479                         u32 mask = 0x01 << (bitnum & 0x1F);
 480                         if (bitnum & 0x20)
 481                                 pdata->hash_hi |= mask;
 482                         else
 483                                 pdata->hash_lo |= mask;
 484                 }
 485
 486                 netif_dbg(dev, drv, dev->net, "HASHH=0x%08X, HASHL=0x%08X\n",
 487                                    pdata->hash_hi, pdata->hash_lo);
 488         } else {
 489                 netif_dbg(dev, drv, dev->net, "receive own packets only\n");
 490                 pdata->mac_cr &=
 491                         ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_ | MAC_CR_HPFILT_);
 492         }
 493
 494         spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
 495
 496         /* Initiate async writes, as we can't wait for completion here */
 497         ret = smsc95xx_write_reg_async(dev, HASHH, pdata->hash_hi);
 498         if (ret < 0)
 499                 netdev_warn(dev->net, "failed to initiate async write to HASHH\n");
 500
 501         ret = smsc95xx_write_reg_async(dev, HASHL, pdata->hash_lo);
 502         if (ret < 0)
 503                 netdev_warn(dev->net, "failed to initiate async write to HASHL\n");
 504
 505         ret = smsc95xx_write_reg_async(dev, MAC_CR, pdata->mac_cr);
 506         if (ret < 0)
 507                 netdev_warn(dev->net, "failed to initiate async write to MAC_CR\n");
 508 }
 509
 510 static int smsc95xx_phy_update_flowcontrol(struct usbnet *dev, u8 duplex,
 511                                            u16 lcladv, u16 rmtadv)
 512 {
 513         u32 flow, afc_cfg = 0;
 514
 515         int ret = smsc95xx_read_reg(dev, AFC_CFG, &afc_cfg);
 516         if (ret < 0) {
 517                 netdev_warn(dev->net, "Error reading AFC_CFG\n");
 518                 return ret;
 519         }
 520
 521         if (duplex == DUPLEX_FULL) {
 522                 u8 cap = mii_resolve_flowctrl_fdx(lcladv, rmtadv);
 523
 524                 if (cap & FLOW_CTRL_RX)
 525                         flow = 0xFFFF0002;
 526                 else
 527                         flow = 0;
 528
 529                 if (cap & FLOW_CTRL_TX)
 530                         afc_cfg |= 0xF;
 531                 else
 532                         afc_cfg &= ~0xF;
 533
 534                 netif_dbg(dev, link, dev->net, "rx pause %s, tx pause %s\n",
 535                                    cap & FLOW_CTRL_RX ? "enabled" : "disabled",
 536                                    cap & FLOW_CTRL_TX ? "enabled" : "disabled");
 537         } else {
 538                 netif_dbg(dev, link, dev->net, "half duplex\n");
 539                 flow = 0;
 540                 afc_cfg |= 0xF;
 541         }
 542
 543         ret = smsc95xx_write_reg(dev, FLOW, flow);
 544         if (ret < 0) {
 545                 netdev_warn(dev->net, "Error writing FLOW\n");
 546                 return ret;
 547         }
 548
 549         ret = smsc95xx_write_reg(dev, AFC_CFG, afc_cfg);
 550         if (ret < 0)
 551                 netdev_warn(dev->net, "Error writing AFC_CFG\n");
 552
 553         return ret;
 554 }
 555
 556 static int smsc95xx_link_reset(struct usbnet *dev)
 557 {
 558         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
 559         struct mii_if_info *mii = &dev->mii;
 560         struct ethtool_cmd ecmd = { .cmd = ETHTOOL_GSET };
 561         unsigned long flags;
 562         u16 lcladv, rmtadv;
 563         int ret;
 564
 565         /* clear interrupt status */
 566         ret = smsc95xx_mdio_read(dev->net, mii->phy_id, PHY_INT_SRC);
 567         if (ret < 0) {
 568                 netdev_warn(dev->net, "Error reading PHY_INT_SRC\n");
 569                 return ret;
 570         }
 571
 572         ret = smsc95xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL_);
 573         if (ret < 0) {
 574                 netdev_warn(dev->net, "Error writing INT_STS\n");
 575                 return ret;
 576         }
 577
 578         mii_check_media(mii, 1, 1);
 579         mii_ethtool_gset(&dev->mii, &ecmd);
 580         lcladv = smsc95xx_mdio_read(dev->net, mii->phy_id, MII_ADVERTISE);
 581         rmtadv = smsc95xx_mdio_read(dev->net, mii->phy_id, MII_LPA);
 582
 583         netif_dbg(dev, link, dev->net,
 584                   "speed: %u duplex: %d lcladv: %04x rmtadv: %04x\n",
 585                   ethtool_cmd_speed(&ecmd), ecmd.duplex, lcladv, rmtadv);
 586
 587         spin_lock_irqsave(&pdata->mac_cr_lock, flags);
 588         if (ecmd.duplex != DUPLEX_FULL) {
 589                 pdata->mac_cr &= ~MAC_CR_FDPX_;
 590                 pdata->mac_cr |= MAC_CR_RCVOWN_;
 591         } else {
 592                 pdata->mac_cr &= ~MAC_CR_RCVOWN_;
 593                 pdata->mac_cr |= MAC_CR_FDPX_;
 594         }
 595         spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
 596
 597         ret = smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr);
 598         if (ret < 0) {
 599                 netdev_warn(dev->net, "Error writing MAC_CR\n");
 600                 return ret;
 601         }
 602
 603         ret = smsc95xx_phy_update_flowcontrol(dev, ecmd.duplex, lcladv, rmtadv);
 604         if (ret < 0)
 605                 netdev_warn(dev->net, "Error updating PHY flow control\n");
 606
 607         return ret;
 608 }
 609
 610 static void smsc95xx_status(struct usbnet *dev, struct urb *urb)
 611 {
 612         u32 intdata;
 613
 614         if (urb->actual_length != 4) {
 615                 netdev_warn(dev->net, "unexpected urb length %d\n",
 616                             urb->actual_length);
 617                 return;
 618         }
 619
 620         memcpy(&intdata, urb->transfer_buffer, 4);
 621         le32_to_cpus(&intdata);
 622
 623         netif_dbg(dev, link, dev->net, "intdata: 0x%08X\n", intdata);
 624
 625         if (intdata & INT_ENP_PHY_INT_)
 626                 usbnet_defer_kevent(dev, EVENT_LINK_RESET);
 627         else
 628                 netdev_warn(dev->net, "unexpected interrupt, intdata=0x%08X\n",
 629                             intdata);
 630 }
 631
 632 /* Enable or disable Tx & Rx checksum offload engines */
 633 static int smsc95xx_set_features(struct net_device *netdev,
 634         netdev_features_t features)
 635 {
 636         struct usbnet *dev = netdev_priv(netdev);
 637         u32 read_buf;
 638         int ret;
 639
 640         ret = smsc95xx_read_reg(dev, COE_CR, &read_buf);
 641         if (ret < 0) {
 642                 netdev_warn(dev->net, "Failed to read COE_CR: %d\n", ret);
 643                 return ret;
 644         }
 645
 646         if (features & NETIF_F_HW_CSUM)
 647                 read_buf |= Tx_COE_EN_;
 648         else
 649                 read_buf &= ~Tx_COE_EN_;
 650
 651         if (features & NETIF_F_RXCSUM)
 652                 read_buf |= Rx_COE_EN_;
 653         else
 654                 read_buf &= ~Rx_COE_EN_;
 655
 656         ret = smsc95xx_write_reg(dev, COE_CR, read_buf);
 657         if (ret < 0) {
 658                 netdev_warn(dev->net, "Failed to write COE_CR: %d\n", ret);
 659                 return ret;
 660         }
 661
 662         netif_dbg(dev, hw, dev->net, "COE_CR = 0x%08x\n", read_buf);
 663         return 0;
 664 }
 665
 666 static int smsc95xx_ethtool_get_eeprom_len(struct net_device *net)
 667 {
 668         return MAX_EEPROM_SIZE;
 669 }
 670
 671 static int smsc95xx_ethtool_get_eeprom(struct net_device *netdev,
 672                                        struct ethtool_eeprom *ee, u8 *data)
 673 {
 674         struct usbnet *dev = netdev_priv(netdev);
 675
 676         ee->magic = LAN95XX_EEPROM_MAGIC;
 677
 678         return smsc95xx_read_eeprom(dev, ee->offset, ee->len, data);
 679 }
 680
 681 static int smsc95xx_ethtool_set_eeprom(struct net_device *netdev,
 682                                        struct ethtool_eeprom *ee, u8 *data)
 683 {
 684         struct usbnet *dev = netdev_priv(netdev);
 685
 686         if (ee->magic != LAN95XX_EEPROM_MAGIC) {
 687                 netdev_warn(dev->net, "EEPROM: magic value mismatch, magic = 0x%x\n",
 688                             ee->magic);
 689                 return -EINVAL;
 690         }
 691
 692         return smsc95xx_write_eeprom(dev, ee->offset, ee->len, data);
 693 }
 694
 695 static int smsc95xx_ethtool_getregslen(struct net_device *netdev)
 696 {
 697         /* all smsc95xx registers */
 698         return COE_CR - ID_REV + sizeof(u32);
 699 }
 700
 701 static void
 702 smsc95xx_ethtool_getregs(struct net_device *netdev, struct ethtool_regs *regs,
 703                          void *buf)
 704 {
 705         struct usbnet *dev = netdev_priv(netdev);
 706         unsigned int i, j;
 707         int retval;
 708         u32 *data = buf;
 709
 710         retval = smsc95xx_read_reg(dev, ID_REV, &regs->version);
 711         if (retval < 0) {
 712                 netdev_warn(netdev, "REGS: cannot read ID_REV\n");
 713                 return;
 714         }
 715
 716         for (i = ID_REV, j = 0; i <= COE_CR; i += (sizeof(u32)), j++) {
 717                 retval = smsc95xx_read_reg(dev, i, &data[j]);
 718                 if (retval < 0) {
 719                         netdev_warn(netdev, "REGS: cannot read reg[%x]\n", i);
 720                         return;
 721                 }
 722         }
 723 }
 724
 725 static void smsc95xx_ethtool_get_wol(struct net_device *net,
 726                                      struct ethtool_wolinfo *wolinfo)
 727 {
 728         struct usbnet *dev = netdev_priv(net);
 729         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
 730
 731         wolinfo->supported = SUPPORTED_WAKE;
 732         wolinfo->wolopts = pdata->wolopts;
 733 }
 734
 735 static int smsc95xx_ethtool_set_wol(struct net_device *net,
 736                                     struct ethtool_wolinfo *wolinfo)
 737 {
 738         struct usbnet *dev = netdev_priv(net);
 739         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
 740         int ret;
 741
 742         pdata->wolopts = wolinfo->wolopts & SUPPORTED_WAKE;
 743
 744         ret = device_set_wakeup_enable(&dev->udev->dev, pdata->wolopts);
 745         if (ret < 0)
 746                 netdev_warn(dev->net, "device_set_wakeup_enable error %d\n", ret);
 747
 748         return ret;
 749 }
 750
 751 static const struct ethtool_ops smsc95xx_ethtool_ops = {
 752         .get_link       = usbnet_get_link,
 753         .nway_reset     = usbnet_nway_reset,
 754         .get_drvinfo    = usbnet_get_drvinfo,
 755         .get_msglevel   = usbnet_get_msglevel,
 756         .set_msglevel   = usbnet_set_msglevel,
 757         .get_settings   = usbnet_get_settings,
 758         .set_settings   = usbnet_set_settings,
 759         .get_eeprom_len = smsc95xx_ethtool_get_eeprom_len,
 760         .get_eeprom     = smsc95xx_ethtool_get_eeprom,
 761         .set_eeprom     = smsc95xx_ethtool_set_eeprom,
 762         .get_regs_len   = smsc95xx_ethtool_getregslen,
 763         .get_regs       = smsc95xx_ethtool_getregs,
 764         .get_wol        = smsc95xx_ethtool_get_wol,
 765         .set_wol        = smsc95xx_ethtool_set_wol,
 766 };
 767
 768 static int smsc95xx_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
 769 {
 770         struct usbnet *dev = netdev_priv(netdev);
 771
 772         if (!netif_running(netdev))
 773                 return -EINVAL;
 774
 775         return generic_mii_ioctl(&dev->mii, if_mii(rq), cmd, NULL);
 776 }
 777
 778 static void smsc95xx_init_mac_address(struct usbnet *dev)
 779 {
 780         /* try reading mac address from EEPROM */
 781         if (smsc95xx_read_eeprom(dev, EEPROM_MAC_OFFSET, ETH_ALEN,
 782                         dev->net->dev_addr) == 0) {
 783                 if (is_valid_ether_addr(dev->net->dev_addr)) {
 784                         /* eeprom values are valid so use them */
 785                         netif_dbg(dev, ifup, dev->net, "MAC address read from EEPROM\n");
 786                         return;
 787                 }
 788         }
 789
 790         /* no eeprom, or eeprom values are invalid. generate random MAC */
 791         eth_hw_addr_random(dev->net);
 792         netif_dbg(dev, ifup, dev->net, "MAC address set to eth_random_addr\n");
 793 }
 794
 795 static int smsc95xx_set_mac_address(struct usbnet *dev)
 796 {
 797         u32 addr_lo = dev->net->dev_addr[0] | dev->net->dev_addr[1] << 8 |
 798                 dev->net->dev_addr[2] << 16 | dev->net->dev_addr[3] << 24;
 799         u32 addr_hi = dev->net->dev_addr[4] | dev->net->dev_addr[5] << 8;
 800         int ret;
 801
 802         ret = smsc95xx_write_reg(dev, ADDRL, addr_lo);
 803         if (ret < 0) {
 804                 netdev_warn(dev->net, "Failed to write ADDRL: %d\n", ret);
 805                 return ret;
 806         }
 807
 808         ret = smsc95xx_write_reg(dev, ADDRH, addr_hi);
 809         if (ret < 0)
 810                 netdev_warn(dev->net, "Failed to write ADDRH: %d\n", ret);
 811
 812         return ret;
 813 }
 814
 815 /* starts the TX path */
 816 static int smsc95xx_start_tx_path(struct usbnet *dev)
 817 {
 818         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
 819         unsigned long flags;
 820         int ret;
 821
 822         /* Enable Tx at MAC */
 823         spin_lock_irqsave(&pdata->mac_cr_lock, flags);
 824         pdata->mac_cr |= MAC_CR_TXEN_;
 825         spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
 826
 827         ret = smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr);
 828         if (ret < 0) {
 829                 netdev_warn(dev->net, "Failed to write MAC_CR: %d\n", ret);
 830                 return ret;
 831         }
 832
 833         /* Enable Tx at SCSRs */
 834         ret = smsc95xx_write_reg(dev, TX_CFG, TX_CFG_ON_);
 835         if (ret < 0)
 836                 netdev_warn(dev->net, "Failed to write TX_CFG: %d\n", ret);
 837
 838         return ret;
 839 }
 840
 841 /* Starts the Receive path */
 842 static int smsc95xx_start_rx_path(struct usbnet *dev, int in_pm)
 843 {
 844         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
 845         unsigned long flags;
 846         int ret;
 847
 848         spin_lock_irqsave(&pdata->mac_cr_lock, flags);
 849         pdata->mac_cr |= MAC_CR_RXEN_;
 850         spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
 851
 852         ret = __smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr, in_pm);
 853         if (ret < 0)
 854                 netdev_warn(dev->net, "Failed to write MAC_CR: %d\n", ret);
 855
 856         return ret;
 857 }
 858
 859 static int smsc95xx_phy_initialize(struct usbnet *dev)
 860 {
 861         int bmcr, ret, timeout = 0;
 862
 863         /* Initialize MII structure */
 864         dev->mii.dev = dev->net;
 865         dev->mii.mdio_read = smsc95xx_mdio_read;
 866         dev->mii.mdio_write = smsc95xx_mdio_write;
 867         dev->mii.phy_id_mask = 0x1f;
 868         dev->mii.reg_num_mask = 0x1f;
 869         dev->mii.phy_id = SMSC95XX_INTERNAL_PHY_ID;
 870
 871         /* reset phy and wait for reset to complete */
 872         smsc95xx_mdio_write(dev->net, dev->mii.phy_id, MII_BMCR, BMCR_RESET);
 873
 874         do {
 875                 msleep(10);
 876                 bmcr = smsc95xx_mdio_read(dev->net, dev->mii.phy_id, MII_BMCR);
 877                 timeout++;
 878         } while ((bmcr & BMCR_RESET) && (timeout < 100));
 879
 880         if (timeout >= 100) {
 881                 netdev_warn(dev->net, "timeout on PHY Reset");
 882                 return -EIO;
 883         }
 884
 885         smsc95xx_mdio_write(dev->net, dev->mii.phy_id, MII_ADVERTISE,
 886                 ADVERTISE_ALL | ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP |
 887                 ADVERTISE_PAUSE_ASYM);
 888
 889         /* read to clear */
 890         ret = smsc95xx_mdio_read(dev->net, dev->mii.phy_id, PHY_INT_SRC);
 891         if (ret < 0) {
 892                 netdev_warn(dev->net, "Failed to read PHY_INT_SRC during init\n");
 893                 return ret;
 894         }
 895
 896         smsc95xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_MASK,
 897                 PHY_INT_MASK_DEFAULT_);
 898         mii_nway_restart(&dev->mii);
 899
 900         netif_dbg(dev, ifup, dev->net, "phy initialised successfully\n");
 901         return 0;
 902 }
 903
 904 static int smsc95xx_reset(struct usbnet *dev)
 905 {
 906         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
 907         u32 read_buf, write_buf, burst_cap;
 908         int ret = 0, timeout;
 909
 910         netif_dbg(dev, ifup, dev->net, "entering smsc95xx_reset\n");
 911
 912         ret = smsc95xx_write_reg(dev, HW_CFG, HW_CFG_LRST_);
 913         if (ret < 0) {
 914                 netdev_warn(dev->net, "Failed to write HW_CFG_LRST_ bit in HW_CFG\n");
 915                 return ret;
 916         }
 917
 918         timeout = 0;
 919         do {
 920                 msleep(10);
 921                 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
 922                 if (ret < 0) {
 923                         netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
 924                         return ret;
 925                 }
 926                 timeout++;
 927         } while ((read_buf & HW_CFG_LRST_) && (timeout < 100));
 928
 929         if (timeout >= 100) {
 930                 netdev_warn(dev->net, "timeout waiting for completion of Lite Reset\n");
 931                 return ret;
 932         }
 933
 934         ret = smsc95xx_write_reg(dev, PM_CTRL, PM_CTL_PHY_RST_);
 935         if (ret < 0) {
 936                 netdev_warn(dev->net, "Failed to write PM_CTRL: %d\n", ret);
 937                 return ret;
 938         }
 939
 940         timeout = 0;
 941         do {
 942                 msleep(10);
 943                 ret = smsc95xx_read_reg(dev, PM_CTRL, &read_buf);
 944                 if (ret < 0) {
 945                         netdev_warn(dev->net, "Failed to read PM_CTRL: %d\n", ret);
 946                         return ret;
 947                 }
 948                 timeout++;
 949         } while ((read_buf & PM_CTL_PHY_RST_) && (timeout < 100));
 950
 951         if (timeout >= 100) {
 952                 netdev_warn(dev->net, "timeout waiting for PHY Reset\n");
 953                 return ret;
 954         }
 955
 956         ret = smsc95xx_set_mac_address(dev);
 957         if (ret < 0)
 958                 return ret;
 959
 960         netif_dbg(dev, ifup, dev->net, "MAC Address: %pM\n",
 961                   dev->net->dev_addr);
 962
 963         ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
 964         if (ret < 0) {
 965                 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
 966                 return ret;
 967         }
 968
 969         netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG : 0x%08x\n",
 970                   read_buf);
 971
 972         read_buf |= HW_CFG_BIR_;
 973
 974         ret = smsc95xx_write_reg(dev, HW_CFG, read_buf);
 975         if (ret < 0) {
 976                 netdev_warn(dev->net, "Failed to write HW_CFG_BIR_ bit in HW_CFG\n");
 977                 return ret;
 978         }
 979
 980         ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
 981         if (ret < 0) {
 982                 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
 983                 return ret;
 984         }
 985
 986         netif_dbg(dev, ifup, dev->net,
 987                   "Read Value from HW_CFG after writing HW_CFG_BIR_: 0x%08x\n",
 988                   read_buf);
 989
 990         if (!turbo_mode) {
 991                 burst_cap = 0;
 992                 dev->rx_urb_size = MAX_SINGLE_PACKET_SIZE;
 993         } else if (dev->udev->speed == USB_SPEED_HIGH) {
 994                 burst_cap = DEFAULT_HS_BURST_CAP_SIZE / HS_USB_PKT_SIZE;
 995                 dev->rx_urb_size = DEFAULT_HS_BURST_CAP_SIZE;
 996         } else {
 997                 burst_cap = DEFAULT_FS_BURST_CAP_SIZE / FS_USB_PKT_SIZE;
 998                 dev->rx_urb_size = DEFAULT_FS_BURST_CAP_SIZE;
 999         }
1000
1001         netif_dbg(dev, ifup, dev->net, "rx_urb_size=%ld\n",
1002                   (ulong)dev->rx_urb_size);
1003
1004         ret = smsc95xx_write_reg(dev, BURST_CAP, burst_cap);
1005         if (ret < 0) {
1006                 netdev_warn(dev->net, "Failed to write BURST_CAP: %d\n", ret);
1007                 return ret;
1008         }
1009
1010         ret = smsc95xx_read_reg(dev, BURST_CAP, &read_buf);
1011         if (ret < 0) {
1012                 netdev_warn(dev->net, "Failed to read BURST_CAP: %d\n", ret);
1013                 return ret;
1014         }
1015
1016         netif_dbg(dev, ifup, dev->net,
1017                   "Read Value from BURST_CAP after writing: 0x%08x\n",
1018                   read_buf);
1019
1020         ret = smsc95xx_write_reg(dev, BULK_IN_DLY, DEFAULT_BULK_IN_DELAY);
1021         if (ret < 0) {
1022                 netdev_warn(dev->net, "Failed to write BULK_IN_DLY: %d\n", ret);
1023                 return ret;
1024         }
1025
1026         ret = smsc95xx_read_reg(dev, BULK_IN_DLY, &read_buf);
1027         if (ret < 0) {
1028                 netdev_warn(dev->net, "Failed to read BULK_IN_DLY: %d\n", ret);
1029                 return ret;
1030         }
1031
1032         netif_dbg(dev, ifup, dev->net,
1033                   "Read Value from BULK_IN_DLY after writing: 0x%08x\n",
1034                   read_buf);
1035
1036         ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
1037         if (ret < 0) {
1038                 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1039                 return ret;
1040         }
1041
1042         netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG: 0x%08x\n",
1043                   read_buf);
1044
1045         if (turbo_mode)
1046                 read_buf |= (HW_CFG_MEF_ | HW_CFG_BCE_);
1047
1048         read_buf &= ~HW_CFG_RXDOFF_;
1049
1050         /* set Rx data offset=2, Make IP header aligns on word boundary. */
1051         read_buf |= NET_IP_ALIGN << 9;
1052
1053         ret = smsc95xx_write_reg(dev, HW_CFG, read_buf);
1054         if (ret < 0) {
1055                 netdev_warn(dev->net, "Failed to write HW_CFG: %d\n", ret);
1056                 return ret;
1057         }
1058
1059         ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
1060         if (ret < 0) {
1061                 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1062                 return ret;
1063         }
1064
1065         netif_dbg(dev, ifup, dev->net,
1066                   "Read Value from HW_CFG after writing: 0x%08x\n", read_buf);
1067
1068         ret = smsc95xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL_);
1069         if (ret < 0) {
1070                 netdev_warn(dev->net, "Failed to write INT_STS: %d\n", ret);
1071                 return ret;
1072         }
1073
1074         ret = smsc95xx_read_reg(dev, ID_REV, &read_buf);
1075         if (ret < 0) {
1076                 netdev_warn(dev->net, "Failed to read ID_REV: %d\n", ret);
1077                 return ret;
1078         }
1079         netif_dbg(dev, ifup, dev->net, "ID_REV = 0x%08x\n", read_buf);
1080
1081         /* Configure GPIO pins as LED outputs */
1082         write_buf = LED_GPIO_CFG_SPD_LED | LED_GPIO_CFG_LNK_LED |
1083                 LED_GPIO_CFG_FDX_LED;
1084         ret = smsc95xx_write_reg(dev, LED_GPIO_CFG, write_buf);
1085         if (ret < 0) {
1086                 netdev_warn(dev->net, "Failed to write LED_GPIO_CFG: %d\n", ret);
1087                 return ret;
1088         }
1089
1090         /* Init Tx */
1091         ret = smsc95xx_write_reg(dev, FLOW, 0);
1092         if (ret < 0) {
1093                 netdev_warn(dev->net, "Failed to write FLOW: %d\n", ret);
1094                 return ret;
1095         }
1096
1097         ret = smsc95xx_write_reg(dev, AFC_CFG, AFC_CFG_DEFAULT);
1098         if (ret < 0) {
1099                 netdev_warn(dev->net, "Failed to write AFC_CFG: %d\n", ret);
1100                 return ret;
1101         }
1102
1103         /* Don't need mac_cr_lock during initialisation */
1104         ret = smsc95xx_read_reg(dev, MAC_CR, &pdata->mac_cr);
1105         if (ret < 0) {
1106                 netdev_warn(dev->net, "Failed to read MAC_CR: %d\n", ret);
1107                 return ret;
1108         }
1109
1110         /* Init Rx */
1111         /* Set Vlan */
1112         ret = smsc95xx_write_reg(dev, VLAN1, (u32)ETH_P_8021Q);
1113         if (ret < 0) {
1114                 netdev_warn(dev->net, "Failed to write VLAN1: %d\n", ret);
1115                 return ret;
1116         }
1117
1118         /* Enable or disable checksum offload engines */
1119         ret = smsc95xx_set_features(dev->net, dev->net->features);
1120         if (ret < 0) {
1121                 netdev_warn(dev->net, "Failed to set checksum offload features\n");
1122                 return ret;
1123         }
1124
1125         smsc95xx_set_multicast(dev->net);
1126
1127         ret = smsc95xx_phy_initialize(dev);
1128         if (ret < 0) {
1129                 netdev_warn(dev->net, "Failed to init PHY\n");
1130                 return ret;
1131         }
1132
1133         ret = smsc95xx_read_reg(dev, INT_EP_CTL, &read_buf);
1134         if (ret < 0) {
1135                 netdev_warn(dev->net, "Failed to read INT_EP_CTL: %d\n", ret);
1136                 return ret;
1137         }
1138
1139         /* enable PHY interrupts */
1140         read_buf |= INT_EP_CTL_PHY_INT_;
1141
1142         ret = smsc95xx_write_reg(dev, INT_EP_CTL, read_buf);
1143         if (ret < 0) {
1144                 netdev_warn(dev->net, "Failed to write INT_EP_CTL: %d\n", ret);
1145                 return ret;
1146         }
1147
1148         ret = smsc95xx_start_tx_path(dev);
1149         if (ret < 0) {
1150                 netdev_warn(dev->net, "Failed to start TX path\n");
1151                 return ret;
1152         }
1153
1154         ret = smsc95xx_start_rx_path(dev, 0);
1155         if (ret < 0) {
1156                 netdev_warn(dev->net, "Failed to start RX path\n");
1157                 return ret;
1158         }
1159
1160         netif_dbg(dev, ifup, dev->net, "smsc95xx_reset, return 0\n");
1161         return 0;
1162 }
1163
1164 static const struct net_device_ops smsc95xx_netdev_ops = {
1165         .ndo_open               = usbnet_open,
1166         .ndo_stop               = usbnet_stop,
1167         .ndo_start_xmit         = usbnet_start_xmit,
1168         .ndo_tx_timeout         = usbnet_tx_timeout,
1169         .ndo_change_mtu         = usbnet_change_mtu,
1170         .ndo_set_mac_address    = eth_mac_addr,
1171         .ndo_validate_addr      = eth_validate_addr,
1172         .ndo_do_ioctl           = smsc95xx_ioctl,
1173         .ndo_set_rx_mode        = smsc95xx_set_multicast,
1174         .ndo_set_features       = smsc95xx_set_features,
1175 };
1176
1177 static int smsc95xx_bind(struct usbnet *dev, struct usb_interface *intf)
1178 {
1179         struct smsc95xx_priv *pdata = NULL;
1180         u32 val;
1181         int ret;
1182
1183         printk(KERN_INFO SMSC_CHIPNAME " v" SMSC_DRIVER_VERSION "\n");
1184
1185         ret = usbnet_get_endpoints(dev, intf);
1186         if (ret < 0) {
1187                 netdev_warn(dev->net, "usbnet_get_endpoints failed: %d\n", ret);
1188                 return ret;
1189         }
1190
1191         dev->data[0] = (unsigned long)kzalloc(sizeof(struct smsc95xx_priv),
1192                 GFP_KERNEL);
1193
1194         pdata = (struct smsc95xx_priv *)(dev->data[0]);
1195         if (!pdata) {
1196                 netdev_warn(dev->net, "Unable to allocate struct smsc95xx_priv\n");
1197                 return -ENOMEM;
1198         }
1199
1200         spin_lock_init(&pdata->mac_cr_lock);
1201
1202         if (DEFAULT_TX_CSUM_ENABLE)
1203                 dev->net->features |= NETIF_F_HW_CSUM;
1204         if (DEFAULT_RX_CSUM_ENABLE)
1205                 dev->net->features |= NETIF_F_RXCSUM;
1206
1207         dev->net->hw_features = NETIF_F_HW_CSUM | NETIF_F_RXCSUM;
1208
1209         smsc95xx_init_mac_address(dev);
1210
1211         /* Init all registers */
1212         ret = smsc95xx_reset(dev);
1213
1214         /* detect device revision as different features may be available */
1215         ret = smsc95xx_read_reg(dev, ID_REV, &val);
1216         if (ret < 0) {
1217                 netdev_warn(dev->net, "Failed to read ID_REV: %d\n", ret);
1218                 return ret;
1219         }
1220         val >>= 16;
1221
1222         if ((val == ID_REV_CHIP_ID_9500A_) || (val == ID_REV_CHIP_ID_9530_) ||
1223             (val == ID_REV_CHIP_ID_89530_) || (val == ID_REV_CHIP_ID_9730_))
1224                 pdata->features = (FEATURE_8_WAKEUP_FILTERS |
1225                         FEATURE_PHY_NLP_CROSSOVER |
1226                         FEATURE_AUTOSUSPEND);
1227         else if (val == ID_REV_CHIP_ID_9512_)
1228                 pdata->features = FEATURE_8_WAKEUP_FILTERS;
1229
1230         dev->net->netdev_ops = &smsc95xx_netdev_ops;
1231         dev->net->ethtool_ops = &smsc95xx_ethtool_ops;
1232         dev->net->flags |= IFF_MULTICAST;
1233         dev->net->hard_header_len += SMSC95XX_TX_OVERHEAD_CSUM;
1234         dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len;
1235         return 0;
1236 }
1237
1238 static void smsc95xx_unbind(struct usbnet *dev, struct usb_interface *intf)
1239 {
1240         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1241         if (pdata) {
1242                 netif_dbg(dev, ifdown, dev->net, "free pdata\n");
1243                 kfree(pdata);
1244                 pdata = NULL;
1245                 dev->data[0] = 0;
1246         }
1247 }
1248
1249 static u32 smsc_crc(const u8 *buffer, size_t len, int filter)
1250 {
1251         u32 crc = bitrev16(crc16(0xFFFF, buffer, len));
1252         return crc << ((filter % 2) * 16);
1253 }
1254
1255 static int smsc95xx_enable_phy_wakeup_interrupts(struct usbnet *dev, u16 mask)
1256 {
1257         struct mii_if_info *mii = &dev->mii;
1258         int ret;
1259
1260         netdev_dbg(dev->net, "enabling PHY wakeup interrupts\n");
1261
1262         /* read to clear */
1263         ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_SRC);
1264         if (ret < 0) {
1265                 netdev_warn(dev->net, "Error reading PHY_INT_SRC\n");
1266                 return ret;
1267         }
1268
1269         /* enable interrupt source */
1270         ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_MASK);
1271         if (ret < 0) {
1272                 netdev_warn(dev->net, "Error reading PHY_INT_MASK\n");
1273                 return ret;
1274         }
1275
1276         ret |= mask;
1277
1278         smsc95xx_mdio_write_nopm(dev->net, mii->phy_id, PHY_INT_MASK, ret);
1279
1280         return 0;
1281 }
1282
1283 static int smsc95xx_link_ok_nopm(struct usbnet *dev)
1284 {
1285         struct mii_if_info *mii = &dev->mii;
1286         int ret;
1287
1288         /* first, a dummy read, needed to latch some MII phys */
1289         ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR);
1290         if (ret < 0) {
1291                 netdev_warn(dev->net, "Error reading MII_BMSR\n");
1292                 return ret;
1293         }
1294
1295         ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR);
1296         if (ret < 0) {
1297                 netdev_warn(dev->net, "Error reading MII_BMSR\n");
1298                 return ret;
1299         }
1300
1301         return !!(ret & BMSR_LSTATUS);
1302 }
1303
1304 static int smsc95xx_enter_suspend0(struct usbnet *dev)
1305 {
1306         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1307         u32 val;
1308         int ret;
1309
1310         ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1311         if (ret < 0) {
1312                 netdev_warn(dev->net, "Error reading PM_CTRL\n");
1313                 return ret;
1314         }
1315
1316         val &= (~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_));
1317         val |= PM_CTL_SUS_MODE_0;
1318
1319         ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1320         if (ret < 0) {
1321                 netdev_warn(dev->net, "Error writing PM_CTRL\n");
1322                 return ret;
1323         }
1324
1325         /* clear wol status */
1326         val &= ~PM_CTL_WUPS_;
1327         val |= PM_CTL_WUPS_WOL_;
1328
1329         /* enable energy detection */
1330         if (pdata->wolopts & WAKE_PHY)
1331                 val |= PM_CTL_WUPS_ED_;
1332
1333         ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1334         if (ret < 0) {
1335                 netdev_warn(dev->net, "Error writing PM_CTRL\n");
1336                 return ret;
1337         }
1338
1339         /* read back PM_CTRL */
1340         ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1341         if (ret < 0)
1342                 netdev_warn(dev->net, "Error reading PM_CTRL\n");
1343
1344         return ret;
1345 }
1346
1347 static int smsc95xx_enter_suspend1(struct usbnet *dev)
1348 {
1349         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1350         struct mii_if_info *mii = &dev->mii;
1351         u32 val;
1352         int ret;
1353
1354         /* reconfigure link pulse detection timing for
1355          * compatibility with non-standard link partners
1356          */
1357         if (pdata->features & FEATURE_PHY_NLP_CROSSOVER)
1358                 smsc95xx_mdio_write_nopm(dev->net, mii->phy_id, PHY_EDPD_CONFIG,
1359                         PHY_EDPD_CONFIG_DEFAULT);
1360
1361         /* enable energy detect power-down mode */
1362         ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_MODE_CTRL_STS);
1363         if (ret < 0) {
1364                 netdev_warn(dev->net, "Error reading PHY_MODE_CTRL_STS\n");
1365                 return ret;
1366         }
1367
1368         ret |= MODE_CTRL_STS_EDPWRDOWN_;
1369
1370         smsc95xx_mdio_write_nopm(dev->net, mii->phy_id, PHY_MODE_CTRL_STS, ret);
1371
1372         /* enter SUSPEND1 mode */
1373         ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1374         if (ret < 0) {
1375                 netdev_warn(dev->net, "Error reading PM_CTRL\n");
1376                 return ret;
1377         }
1378
1379         val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_);
1380         val |= PM_CTL_SUS_MODE_1;
1381
1382         ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1383         if (ret < 0) {
1384                 netdev_warn(dev->net, "Error writing PM_CTRL\n");
1385                 return ret;
1386         }
1387
1388         /* clear wol status, enable energy detection */
1389         val &= ~PM_CTL_WUPS_;
1390         val |= (PM_CTL_WUPS_ED_ | PM_CTL_ED_EN_);
1391
1392         ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1393         if (ret < 0)
1394                 netdev_warn(dev->net, "Error writing PM_CTRL\n");
1395
1396         return ret;
1397 }
1398
1399 static int smsc95xx_enter_suspend2(struct usbnet *dev)
1400 {
1401         u32 val;
1402         int ret;
1403
1404         ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1405         if (ret < 0) {
1406                 netdev_warn(dev->net, "Error reading PM_CTRL\n");
1407                 return ret;
1408         }
1409
1410         val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_);
1411         val |= PM_CTL_SUS_MODE_2;
1412
1413         ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1414         if (ret < 0)
1415                 netdev_warn(dev->net, "Error writing PM_CTRL\n");
1416
1417         return ret;
1418 }
1419
1420 static int smsc95xx_suspend(struct usb_interface *intf, pm_message_t message)
1421 {
1422         struct usbnet *dev = usb_get_intfdata(intf);
1423         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1424         u32 val, link_up;
1425         int ret;
1426
1427         ret = usbnet_suspend(intf, message);
1428         if (ret < 0) {
1429                 netdev_warn(dev->net, "usbnet_suspend error\n");
1430                 return ret;
1431         }
1432
1433         /* determine if link is up using only _nopm functions */
1434         link_up = smsc95xx_link_ok_nopm(dev);
1435
1436         /* if no wol options set, or if link is down and we're not waking on
1437          * PHY activity, enter lowest power SUSPEND2 mode
1438          */
1439         if (!(pdata->wolopts & SUPPORTED_WAKE) ||
1440                 !(link_up || (pdata->wolopts & WAKE_PHY))) {
1441                 netdev_info(dev->net, "entering SUSPEND2 mode\n");
1442
1443                 /* disable energy detect (link up) & wake up events */
1444                 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val);
1445                 if (ret < 0) {
1446                         netdev_warn(dev->net, "Error reading WUCSR\n");
1447                         goto done;
1448                 }
1449
1450                 val &= ~(WUCSR_MPEN_ | WUCSR_WAKE_EN_);
1451
1452                 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val);
1453                 if (ret < 0) {
1454                         netdev_warn(dev->net, "Error writing WUCSR\n");
1455                         goto done;
1456                 }
1457
1458                 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1459                 if (ret < 0) {
1460                         netdev_warn(dev->net, "Error reading PM_CTRL\n");
1461                         goto done;
1462                 }
1463
1464                 val &= ~(PM_CTL_ED_EN_ | PM_CTL_WOL_EN_);
1465
1466                 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1467                 if (ret < 0) {
1468                         netdev_warn(dev->net, "Error writing PM_CTRL\n");
1469                         goto done;
1470                 }
1471
1472                 ret = smsc95xx_enter_suspend2(dev);
1473                 goto done;
1474         }
1475
1476         if (pdata->wolopts & WAKE_PHY) {
1477                 ret = smsc95xx_enable_phy_wakeup_interrupts(dev,
1478                         (PHY_INT_MASK_ANEG_COMP_ | PHY_INT_MASK_LINK_DOWN_));
1479                 if (ret < 0) {
1480                         netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1481                         goto done;
1482                 }
1483
1484                 /* if link is down then configure EDPD and enter SUSPEND1,
1485                  * otherwise enter SUSPEND0 below
1486                  */
1487                 if (!link_up) {
1488                         netdev_info(dev->net, "entering SUSPEND1 mode\n");
1489                         ret = smsc95xx_enter_suspend1(dev);
1490                         goto done;
1491                 }
1492         }
1493
1494         if (pdata->wolopts & (WAKE_BCAST | WAKE_MCAST | WAKE_ARP | WAKE_UCAST)) {
1495                 u32 *filter_mask = kzalloc(sizeof(u32) * 32, GFP_KERNEL);
1496                 u32 command[2];
1497                 u32 offset[2];
1498                 u32 crc[4];
1499                 int wuff_filter_count =
1500                         (pdata->features & FEATURE_8_WAKEUP_FILTERS) ?
1501                         LAN9500A_WUFF_NUM : LAN9500_WUFF_NUM;
1502                 int i, filter = 0;
1503
1504                 if (!filter_mask) {
1505                         netdev_warn(dev->net, "Unable to allocate filter_mask\n");
1506                         ret = -ENOMEM;
1507                         goto done;
1508                 }
1509
1510                 memset(command, 0, sizeof(command));
1511                 memset(offset, 0, sizeof(offset));
1512                 memset(crc, 0, sizeof(crc));
1513
1514                 if (pdata->wolopts & WAKE_BCAST) {
1515                         const u8 bcast[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
1516                         netdev_info(dev->net, "enabling broadcast detection\n");
1517                         filter_mask[filter * 4] = 0x003F;
1518                         filter_mask[filter * 4 + 1] = 0x00;
1519                         filter_mask[filter * 4 + 2] = 0x00;
1520                         filter_mask[filter * 4 + 3] = 0x00;
1521                         command[filter/4] |= 0x05UL << ((filter % 4) * 8);
1522                         offset[filter/4] |= 0x00 << ((filter % 4) * 8);
1523                         crc[filter/2] |= smsc_crc(bcast, 6, filter);
1524                         filter++;
1525                 }
1526
1527                 if (pdata->wolopts & WAKE_MCAST) {
1528                         const u8 mcast[] = {0x01, 0x00, 0x5E};
1529                         netdev_info(dev->net, "enabling multicast detection\n");
1530                         filter_mask[filter * 4] = 0x0007;
1531                         filter_mask[filter * 4 + 1] = 0x00;
1532                         filter_mask[filter * 4 + 2] = 0x00;
1533                         filter_mask[filter * 4 + 3] = 0x00;
1534                         command[filter/4] |= 0x09UL << ((filter % 4) * 8);
1535                         offset[filter/4] |= 0x00  << ((filter % 4) * 8);
1536                         crc[filter/2] |= smsc_crc(mcast, 3, filter);
1537                         filter++;
1538                 }
1539
1540                 if (pdata->wolopts & WAKE_ARP) {
1541                         const u8 arp[] = {0x08, 0x06};
1542                         netdev_info(dev->net, "enabling ARP detection\n");
1543                         filter_mask[filter * 4] = 0x0003;
1544                         filter_mask[filter * 4 + 1] = 0x00;
1545                         filter_mask[filter * 4 + 2] = 0x00;
1546                         filter_mask[filter * 4 + 3] = 0x00;
1547                         command[filter/4] |= 0x05UL << ((filter % 4) * 8);
1548                         offset[filter/4] |= 0x0C << ((filter % 4) * 8);
1549                         crc[filter/2] |= smsc_crc(arp, 2, filter);
1550                         filter++;
1551                 }
1552
1553                 if (pdata->wolopts & WAKE_UCAST) {
1554                         netdev_info(dev->net, "enabling unicast detection\n");
1555                         filter_mask[filter * 4] = 0x003F;
1556                         filter_mask[filter * 4 + 1] = 0x00;
1557                         filter_mask[filter * 4 + 2] = 0x00;
1558                         filter_mask[filter * 4 + 3] = 0x00;
1559                         command[filter/4] |= 0x01UL << ((filter % 4) * 8);
1560                         offset[filter/4] |= 0x00 << ((filter % 4) * 8);
1561                         crc[filter/2] |= smsc_crc(dev->net->dev_addr, ETH_ALEN, filter);
1562                         filter++;
1563                 }
1564
1565                 for (i = 0; i < (wuff_filter_count * 4); i++) {
1566                         ret = smsc95xx_write_reg_nopm(dev, WUFF, filter_mask[i]);
1567                         if (ret < 0) {
1568                                 netdev_warn(dev->net, "Error writing WUFF\n");
1569                                 kfree(filter_mask);
1570                                 goto done;
1571                         }
1572                 }
1573                 kfree(filter_mask);
1574
1575                 for (i = 0; i < (wuff_filter_count / 4); i++) {
1576                         ret = smsc95xx_write_reg_nopm(dev, WUFF, command[i]);
1577                         if (ret < 0) {
1578                                 netdev_warn(dev->net, "Error writing WUFF\n");
1579                                 goto done;
1580                         }
1581                 }
1582
1583                 for (i = 0; i < (wuff_filter_count / 4); i++) {
1584                         ret = smsc95xx_write_reg_nopm(dev, WUFF, offset[i]);
1585                         if (ret < 0) {
1586                                 netdev_warn(dev->net, "Error writing WUFF\n");
1587                                 goto done;
1588                         }
1589                 }
1590
1591                 for (i = 0; i < (wuff_filter_count / 2); i++) {
1592                         ret = smsc95xx_write_reg_nopm(dev, WUFF, crc[i]);
1593                         if (ret < 0) {
1594                                 netdev_warn(dev->net, "Error writing WUFF\n");
1595                                 goto done;
1596                         }
1597                 }
1598
1599                 /* clear any pending pattern match packet status */
1600                 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val);
1601                 if (ret < 0) {
1602                         netdev_warn(dev->net, "Error reading WUCSR\n");
1603                         goto done;
1604                 }
1605
1606                 val |= WUCSR_WUFR_;
1607
1608                 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val);
1609                 if (ret < 0) {
1610                         netdev_warn(dev->net, "Error writing WUCSR\n");
1611                         goto done;
1612                 }
1613         }
1614
1615         if (pdata->wolopts & WAKE_MAGIC) {
1616                 /* clear any pending magic packet status */
1617                 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val);
1618                 if (ret < 0) {
1619                         netdev_warn(dev->net, "Error reading WUCSR\n");
1620                         goto done;
1621                 }
1622
1623                 val |= WUCSR_MPR_;
1624
1625                 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val);
1626                 if (ret < 0) {
1627                         netdev_warn(dev->net, "Error writing WUCSR\n");
1628                         goto done;
1629                 }
1630         }
1631
1632         /* enable/disable wakeup sources */
1633         ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val);
1634         if (ret < 0) {
1635                 netdev_warn(dev->net, "Error reading WUCSR\n");
1636                 goto done;
1637         }
1638
1639         if (pdata->wolopts & (WAKE_BCAST | WAKE_MCAST | WAKE_ARP | WAKE_UCAST)) {
1640                 netdev_info(dev->net, "enabling pattern match wakeup\n");
1641                 val |= WUCSR_WAKE_EN_;
1642         } else {
1643                 netdev_info(dev->net, "disabling pattern match wakeup\n");
1644                 val &= ~WUCSR_WAKE_EN_;
1645         }
1646
1647         if (pdata->wolopts & WAKE_MAGIC) {
1648                 netdev_info(dev->net, "enabling magic packet wakeup\n");
1649                 val |= WUCSR_MPEN_;
1650         } else {
1651                 netdev_info(dev->net, "disabling magic packet wakeup\n");
1652                 val &= ~WUCSR_MPEN_;
1653         }
1654
1655         ret = smsc95xx_write_reg_nopm(dev, WUCSR, val);
1656         if (ret < 0) {
1657                 netdev_warn(dev->net, "Error writing WUCSR\n");
1658                 goto done;
1659         }
1660
1661         /* enable wol wakeup source */
1662         ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1663         if (ret < 0) {
1664                 netdev_warn(dev->net, "Error reading PM_CTRL\n");
1665                 goto done;
1666         }
1667
1668         val |= PM_CTL_WOL_EN_;
1669
1670         /* phy energy detect wakeup source */
1671         if (pdata->wolopts & WAKE_PHY)
1672                 val |= PM_CTL_ED_EN_;
1673
1674         ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1675         if (ret < 0) {
1676                 netdev_warn(dev->net, "Error writing PM_CTRL\n");
1677                 goto done;
1678         }
1679
1680         /* enable receiver to enable frame reception */
1681         smsc95xx_start_rx_path(dev, 1);
1682
1683         /* some wol options are enabled, so enter SUSPEND0 */
1684         netdev_info(dev->net, "entering SUSPEND0 mode\n");
1685         ret = smsc95xx_enter_suspend0(dev);
1686
1687 done:
1688         if (ret)
1689                 usbnet_resume(intf);
1690         return ret;
1691 }
1692
1693 static int smsc95xx_resume(struct usb_interface *intf)
1694 {
1695         struct usbnet *dev = usb_get_intfdata(intf);
1696         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1697         int ret;
1698         u32 val;
1699
1700         BUG_ON(!dev);
1701
1702         if (pdata->wolopts) {
1703                 /* clear wake-up sources */
1704                 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val);
1705                 if (ret < 0) {
1706                         netdev_warn(dev->net, "Error reading WUCSR\n");
1707                         return ret;
1708                 }
1709
1710                 val &= ~(WUCSR_WAKE_EN_ | WUCSR_MPEN_);
1711
1712                 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val);
1713                 if (ret < 0) {
1714                         netdev_warn(dev->net, "Error writing WUCSR\n");
1715                         return ret;
1716                 }
1717
1718                 /* clear wake-up status */
1719                 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1720                 if (ret < 0) {
1721                         netdev_warn(dev->net, "Error reading PM_CTRL\n");
1722                         return ret;
1723                 }
1724
1725                 val &= ~PM_CTL_WOL_EN_;
1726                 val |= PM_CTL_WUPS_;
1727
1728                 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1729                 if (ret < 0) {
1730                         netdev_warn(dev->net, "Error writing PM_CTRL\n");
1731                         return ret;
1732                 }
1733         }
1734
1735         ret = usbnet_resume(intf);
1736         if (ret < 0)
1737                 netdev_warn(dev->net, "usbnet_resume error\n");
1738
1739         return ret;
1740 }
1741
1742 static void smsc95xx_rx_csum_offload(struct sk_buff *skb)
1743 {
1744         skb->csum = *(u16 *)(skb_tail_pointer(skb) - 2);
1745         skb->ip_summed = CHECKSUM_COMPLETE;
1746         skb_trim(skb, skb->len - 2);
1747 }
1748
1749 static int smsc95xx_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
1750 {
1751         while (skb->len > 0) {
1752                 u32 header, align_count;
1753                 struct sk_buff *ax_skb;
1754                 unsigned char *packet;
1755                 u16 size;
1756
1757                 memcpy(&header, skb->data, sizeof(header));
1758                 le32_to_cpus(&header);
1759                 skb_pull(skb, 4 + NET_IP_ALIGN);
1760                 packet = skb->data;
1761
1762                 /* get the packet length */
1763                 size = (u16)((header & RX_STS_FL_) >> 16);
1764                 align_count = (4 - ((size + NET_IP_ALIGN) % 4)) % 4;
1765
1766                 if (unlikely(header & RX_STS_ES_)) {
1767                         netif_dbg(dev, rx_err, dev->net,
1768                                   "Error header=0x%08x\n", header);
1769                         dev->net->stats.rx_errors++;
1770                         dev->net->stats.rx_dropped++;
1771
1772                         if (header & RX_STS_CRC_) {
1773                                 dev->net->stats.rx_crc_errors++;
1774                         } else {
1775                                 if (header & (RX_STS_TL_ | RX_STS_RF_))
1776                                         dev->net->stats.rx_frame_errors++;
1777
1778                                 if ((header & RX_STS_LE_) &&
1779                                         (!(header & RX_STS_FT_)))
1780                                         dev->net->stats.rx_length_errors++;
1781                         }
1782                 } else {
1783                         /* ETH_FRAME_LEN + 4(CRC) + 2(COE) + 4(Vlan) */
1784                         if (unlikely(size > (ETH_FRAME_LEN + 12))) {
1785                                 netif_dbg(dev, rx_err, dev->net,
1786                                           "size err header=0x%08x\n", header);
1787                                 return 0;
1788                         }
1789
1790                         /* last frame in this batch */
1791                         if (skb->len == size) {
1792                                 if (dev->net->features & NETIF_F_RXCSUM)
1793                                         smsc95xx_rx_csum_offload(skb);
1794                                 skb_trim(skb, skb->len - 4); /* remove fcs */
1795                                 skb->truesize = size + sizeof(struct sk_buff);
1796
1797                                 return 1;
1798                         }
1799
1800                         ax_skb = skb_clone(skb, GFP_ATOMIC);
1801                         if (unlikely(!ax_skb)) {
1802                                 netdev_warn(dev->net, "Error allocating skb\n");
1803                                 return 0;
1804                         }
1805
1806                         ax_skb->len = size;
1807                         ax_skb->data = packet;
1808                         skb_set_tail_pointer(ax_skb, size);
1809
1810                         if (dev->net->features & NETIF_F_RXCSUM)
1811                                 smsc95xx_rx_csum_offload(ax_skb);
1812                         skb_trim(ax_skb, ax_skb->len - 4); /* remove fcs */
1813                         ax_skb->truesize = size + sizeof(struct sk_buff);
1814
1815                         usbnet_skb_return(dev, ax_skb);
1816                 }
1817
1818                 skb_pull(skb, size);
1819
1820                 /* padding bytes before the next frame starts */
1821                 if (skb->len)
1822                         skb_pull(skb, align_count);
1823         }
1824
1825         if (unlikely(skb->len < 0)) {
1826                 netdev_warn(dev->net, "invalid rx length<0 %d\n", skb->len);
1827                 return 0;
1828         }
1829
1830         return 1;
1831 }
1832
1833 static u32 smsc95xx_calc_csum_preamble(struct sk_buff *skb)
1834 {
1835         u16 low_16 = (u16)skb_checksum_start_offset(skb);
1836         u16 high_16 = low_16 + skb->csum_offset;
1837         return (high_16 << 16) | low_16;
1838 }
1839
1840 static struct sk_buff *smsc95xx_tx_fixup(struct usbnet *dev,
1841                                          struct sk_buff *skb, gfp_t flags)
1842 {
1843         bool csum = skb->ip_summed == CHECKSUM_PARTIAL;
1844         int overhead = csum ? SMSC95XX_TX_OVERHEAD_CSUM : SMSC95XX_TX_OVERHEAD;
1845         u32 tx_cmd_a, tx_cmd_b;
1846
1847         /* We do not advertise SG, so skbs should be already linearized */
1848         BUG_ON(skb_shinfo(skb)->nr_frags);
1849
1850         if (skb_headroom(skb) < overhead) {
1851                 struct sk_buff *skb2 = skb_copy_expand(skb,
1852                         overhead, 0, flags);
1853                 dev_kfree_skb_any(skb);
1854                 skb = skb2;
1855                 if (!skb)
1856                         return NULL;
1857         }
1858
1859         if (csum) {
1860                 if (skb->len <= 45) {
1861                         /* workaround - hardware tx checksum does not work
1862                          * properly with extremely small packets */
1863                         long csstart = skb_checksum_start_offset(skb);
1864                         __wsum calc = csum_partial(skb->data + csstart,
1865                                 skb->len - csstart, 0);
1866                         *((__sum16 *)(skb->data + csstart
1867                                 + skb->csum_offset)) = csum_fold(calc);
1868
1869                         csum = false;
1870                 } else {
1871                         u32 csum_preamble = smsc95xx_calc_csum_preamble(skb);
1872                         skb_push(skb, 4);
1873                         cpu_to_le32s(&csum_preamble);
1874                         memcpy(skb->data, &csum_preamble, 4);
1875                 }
1876         }
1877
1878         skb_push(skb, 4);
1879         tx_cmd_b = (u32)(skb->len - 4);
1880         if (csum)
1881                 tx_cmd_b |= TX_CMD_B_CSUM_ENABLE;
1882         cpu_to_le32s(&tx_cmd_b);
1883         memcpy(skb->data, &tx_cmd_b, 4);
1884
1885         skb_push(skb, 4);
1886         tx_cmd_a = (u32)(skb->len - 8) | TX_CMD_A_FIRST_SEG_ |
1887                 TX_CMD_A_LAST_SEG_;
1888         cpu_to_le32s(&tx_cmd_a);
1889         memcpy(skb->data, &tx_cmd_a, 4);
1890
1891         return skb;
1892 }
1893
1894 static const struct driver_info smsc95xx_info = {
1895         .description    = "smsc95xx USB 2.0 Ethernet",
1896         .bind           = smsc95xx_bind,
1897         .unbind         = smsc95xx_unbind,
1898         .link_reset     = smsc95xx_link_reset,
1899         .reset          = smsc95xx_reset,
1900         .rx_fixup       = smsc95xx_rx_fixup,
1901         .tx_fixup       = smsc95xx_tx_fixup,
1902         .status         = smsc95xx_status,
1903         .flags          = FLAG_ETHER | FLAG_SEND_ZLP | FLAG_LINK_INTR,
1904 };
1905
1906 static const struct usb_device_id products[] = {
1907         {
1908                 /* SMSC9500 USB Ethernet Device */
1909                 USB_DEVICE(0x0424, 0x9500),
1910                 .driver_info = (unsigned long) &smsc95xx_info,
1911         },
1912         {
1913                 /* SMSC9505 USB Ethernet Device */
1914                 USB_DEVICE(0x0424, 0x9505),
1915                 .driver_info = (unsigned long) &smsc95xx_info,
1916         },
1917         {
1918                 /* SMSC9500A USB Ethernet Device */
1919                 USB_DEVICE(0x0424, 0x9E00),
1920                 .driver_info = (unsigned long) &smsc95xx_info,
1921         },
1922         {
1923                 /* SMSC9505A USB Ethernet Device */
1924                 USB_DEVICE(0x0424, 0x9E01),
1925                 .driver_info = (unsigned long) &smsc95xx_info,
1926         },
1927         {
1928                 /* SMSC9512/9514 USB Hub & Ethernet Device */
1929                 USB_DEVICE(0x0424, 0xec00),
1930                 .driver_info = (unsigned long) &smsc95xx_info,
1931         },
1932         {
1933                 /* SMSC9500 USB Ethernet Device (SAL10) */
1934                 USB_DEVICE(0x0424, 0x9900),
1935                 .driver_info = (unsigned long) &smsc95xx_info,
1936         },
1937         {
1938                 /* SMSC9505 USB Ethernet Device (SAL10) */
1939                 USB_DEVICE(0x0424, 0x9901),
1940                 .driver_info = (unsigned long) &smsc95xx_info,
1941         },
1942         {
1943                 /* SMSC9500A USB Ethernet Device (SAL10) */
1944                 USB_DEVICE(0x0424, 0x9902),
1945                 .driver_info = (unsigned long) &smsc95xx_info,
1946         },
1947         {
1948                 /* SMSC9505A USB Ethernet Device (SAL10) */
1949                 USB_DEVICE(0x0424, 0x9903),
1950                 .driver_info = (unsigned long) &smsc95xx_info,
1951         },
1952         {
1953                 /* SMSC9512/9514 USB Hub & Ethernet Device (SAL10) */
1954                 USB_DEVICE(0x0424, 0x9904),
1955                 .driver_info = (unsigned long) &smsc95xx_info,
1956         },
1957         {
1958                 /* SMSC9500A USB Ethernet Device (HAL) */
1959                 USB_DEVICE(0x0424, 0x9905),
1960                 .driver_info = (unsigned long) &smsc95xx_info,
1961         },
1962         {
1963                 /* SMSC9505A USB Ethernet Device (HAL) */
1964                 USB_DEVICE(0x0424, 0x9906),
1965                 .driver_info = (unsigned long) &smsc95xx_info,
1966         },
1967         {
1968                 /* SMSC9500 USB Ethernet Device (Alternate ID) */
1969                 USB_DEVICE(0x0424, 0x9907),
1970                 .driver_info = (unsigned long) &smsc95xx_info,
1971         },
1972         {
1973                 /* SMSC9500A USB Ethernet Device (Alternate ID) */
1974                 USB_DEVICE(0x0424, 0x9908),
1975                 .driver_info = (unsigned long) &smsc95xx_info,
1976         },
1977         {
1978                 /* SMSC9512/9514 USB Hub & Ethernet Device (Alternate ID) */
1979                 USB_DEVICE(0x0424, 0x9909),
1980                 .driver_info = (unsigned long) &smsc95xx_info,
1981         },
1982         {
1983                 /* SMSC LAN9530 USB Ethernet Device */
1984                 USB_DEVICE(0x0424, 0x9530),
1985                 .driver_info = (unsigned long) &smsc95xx_info,
1986         },
1987         {
1988                 /* SMSC LAN9730 USB Ethernet Device */
1989                 USB_DEVICE(0x0424, 0x9730),
1990                 .driver_info = (unsigned long) &smsc95xx_info,
1991         },
1992         {
1993                 /* SMSC LAN89530 USB Ethernet Device */
1994                 USB_DEVICE(0x0424, 0x9E08),
1995                 .driver_info = (unsigned long) &smsc95xx_info,
1996         },
1997         { },            /* END */
1998 };
1999 MODULE_DEVICE_TABLE(usb, products);
2000
2001 static struct usb_driver smsc95xx_driver = {
2002         .name           = "smsc95xx",
2003         .id_table       = products,
2004         .probe          = usbnet_probe,
2005         .suspend        = smsc95xx_suspend,
2006         .resume         = smsc95xx_resume,
2007         .reset_resume   = smsc95xx_resume,
2008         .disconnect     = usbnet_disconnect,
2009         .disable_hub_initiated_lpm = 1,
2010 };
2011
2012 module_usb_driver(smsc95xx_driver);
2013
2014 MODULE_AUTHOR("Nancy Lin");
2015 MODULE_AUTHOR("Steve Glendinning <steve.glendinning@shawell.net>");
2016 MODULE_DESCRIPTION("SMSC95XX USB 2.0 Ethernet Devices");
2017 MODULE_LICENSE("GPL");